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1 | /** @file\r | |
2 | Contains code that implements the virtual machine.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "EbcInt.h"\r | |
16 | #include "EbcExecute.h"\r | |
17 | #include "EbcDebuggerHook.h"\r | |
18 | \r | |
19 | \r | |
20 | //\r | |
21 | // Define some useful data size constants to allow switch statements based on\r | |
22 | // size of operands or data.\r | |
23 | //\r | |
24 | #define DATA_SIZE_INVALID 0\r | |
25 | #define DATA_SIZE_8 1\r | |
26 | #define DATA_SIZE_16 2\r | |
27 | #define DATA_SIZE_32 4\r | |
28 | #define DATA_SIZE_64 8\r | |
29 | #define DATA_SIZE_N 48 // 4 or 8\r | |
30 | //\r | |
31 | // Structure we'll use to dispatch opcodes to execute functions.\r | |
32 | //\r | |
33 | typedef struct {\r | |
34 | EFI_STATUS (*ExecuteFunction) (IN VM_CONTEXT * VmPtr);\r | |
35 | }\r | |
36 | VM_TABLE_ENTRY;\r | |
37 | \r | |
38 | typedef\r | |
39 | UINT64\r | |
40 | (*DATA_MANIP_EXEC_FUNCTION) (\r | |
41 | IN VM_CONTEXT * VmPtr,\r | |
42 | IN UINT64 Op1,\r | |
43 | IN UINT64 Op2\r | |
44 | );\r | |
45 | \r | |
46 | /**\r | |
47 | Decode a 16-bit index to determine the offset. Given an index value:\r | |
48 | \r | |
49 | b15 - sign bit\r | |
50 | b14:12 - number of bits in this index assigned to natural units (=a)\r | |
51 | ba:11 - constant units = ConstUnits\r | |
52 | b0:a - natural units = NaturalUnits\r | |
53 | \r | |
54 | Given this info, the offset can be computed by:\r | |
55 | offset = sign_bit * (ConstUnits + NaturalUnits * sizeof(UINTN))\r | |
56 | \r | |
57 | Max offset is achieved with index = 0x7FFF giving an offset of\r | |
58 | 0x27B (32-bit machine) or 0x477 (64-bit machine).\r | |
59 | Min offset is achieved with index =\r | |
60 | \r | |
61 | @param VmPtr A pointer to VM context.\r | |
62 | @param CodeOffset Offset from IP of the location of the 16-bit index\r | |
63 | to decode.\r | |
64 | \r | |
65 | @return The decoded offset.\r | |
66 | \r | |
67 | **/\r | |
68 | INT16\r | |
69 | VmReadIndex16 (\r | |
70 | IN VM_CONTEXT *VmPtr,\r | |
71 | IN UINT32 CodeOffset\r | |
72 | );\r | |
73 | \r | |
74 | /**\r | |
75 | Decode a 32-bit index to determine the offset.\r | |
76 | \r | |
77 | @param VmPtr A pointer to VM context.\r | |
78 | @param CodeOffset Offset from IP of the location of the 32-bit index\r | |
79 | to decode.\r | |
80 | \r | |
81 | @return Converted index per EBC VM specification.\r | |
82 | \r | |
83 | **/\r | |
84 | INT32\r | |
85 | VmReadIndex32 (\r | |
86 | IN VM_CONTEXT *VmPtr,\r | |
87 | IN UINT32 CodeOffset\r | |
88 | );\r | |
89 | \r | |
90 | /**\r | |
91 | Decode a 64-bit index to determine the offset.\r | |
92 | \r | |
93 | @param VmPtr A pointer to VM context.s\r | |
94 | @param CodeOffset Offset from IP of the location of the 64-bit index\r | |
95 | to decode.\r | |
96 | \r | |
97 | @return Converted index per EBC VM specification\r | |
98 | \r | |
99 | **/\r | |
100 | INT64\r | |
101 | VmReadIndex64 (\r | |
102 | IN VM_CONTEXT *VmPtr,\r | |
103 | IN UINT32 CodeOffset\r | |
104 | );\r | |
105 | \r | |
106 | /**\r | |
107 | Reads 8-bit data form the memory address.\r | |
108 | \r | |
109 | @param VmPtr A pointer to VM context.\r | |
110 | @param Addr The memory address.\r | |
111 | \r | |
112 | @return The 8-bit value from the memory address.\r | |
113 | \r | |
114 | **/\r | |
115 | UINT8\r | |
116 | VmReadMem8 (\r | |
117 | IN VM_CONTEXT *VmPtr,\r | |
118 | IN UINTN Addr\r | |
119 | );\r | |
120 | \r | |
121 | /**\r | |
122 | Reads 16-bit data form the memory address.\r | |
123 | \r | |
124 | @param VmPtr A pointer to VM context.\r | |
125 | @param Addr The memory address.\r | |
126 | \r | |
127 | @return The 16-bit value from the memory address.\r | |
128 | \r | |
129 | **/\r | |
130 | UINT16\r | |
131 | VmReadMem16 (\r | |
132 | IN VM_CONTEXT *VmPtr,\r | |
133 | IN UINTN Addr\r | |
134 | );\r | |
135 | \r | |
136 | /**\r | |
137 | Reads 32-bit data form the memory address.\r | |
138 | \r | |
139 | @param VmPtr A pointer to VM context.\r | |
140 | @param Addr The memory address.\r | |
141 | \r | |
142 | @return The 32-bit value from the memory address.\r | |
143 | \r | |
144 | **/\r | |
145 | UINT32\r | |
146 | VmReadMem32 (\r | |
147 | IN VM_CONTEXT *VmPtr,\r | |
148 | IN UINTN Addr\r | |
149 | );\r | |
150 | \r | |
151 | /**\r | |
152 | Reads 64-bit data form the memory address.\r | |
153 | \r | |
154 | @param VmPtr A pointer to VM context.\r | |
155 | @param Addr The memory address.\r | |
156 | \r | |
157 | @return The 64-bit value from the memory address.\r | |
158 | \r | |
159 | **/\r | |
160 | UINT64\r | |
161 | VmReadMem64 (\r | |
162 | IN VM_CONTEXT *VmPtr,\r | |
163 | IN UINTN Addr\r | |
164 | );\r | |
165 | \r | |
166 | /**\r | |
167 | Read a natural value from memory. May or may not be aligned.\r | |
168 | \r | |
169 | @param VmPtr current VM context\r | |
170 | @param Addr the address to read from\r | |
171 | \r | |
172 | @return The natural value at address Addr.\r | |
173 | \r | |
174 | **/\r | |
175 | UINTN\r | |
176 | VmReadMemN (\r | |
177 | IN VM_CONTEXT *VmPtr,\r | |
178 | IN UINTN Addr\r | |
179 | );\r | |
180 | \r | |
181 | /**\r | |
182 | Writes 8-bit data to memory address.\r | |
183 | \r | |
184 | This routine is called by the EBC data\r | |
185 | movement instructions that write to memory. Since these writes\r | |
186 | may be to the stack, which looks like (high address on top) this,\r | |
187 | \r | |
188 | [EBC entry point arguments]\r | |
189 | [VM stack]\r | |
190 | [EBC stack]\r | |
191 | \r | |
192 | we need to detect all attempts to write to the EBC entry point argument\r | |
193 | stack area and adjust the address (which will initially point into the\r | |
194 | VM stack) to point into the EBC entry point arguments.\r | |
195 | \r | |
196 | @param VmPtr A pointer to a VM context.\r | |
197 | @param Addr Address to write to.\r | |
198 | @param Data Value to write to Addr.\r | |
199 | \r | |
200 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
201 | @retval Other Some error occurs when writing data to the address.\r | |
202 | \r | |
203 | **/\r | |
204 | EFI_STATUS\r | |
205 | VmWriteMem8 (\r | |
206 | IN VM_CONTEXT *VmPtr,\r | |
207 | IN UINTN Addr,\r | |
208 | IN UINT8 Data\r | |
209 | );\r | |
210 | \r | |
211 | /**\r | |
212 | Writes 16-bit data to memory address.\r | |
213 | \r | |
214 | This routine is called by the EBC data\r | |
215 | movement instructions that write to memory. Since these writes\r | |
216 | may be to the stack, which looks like (high address on top) this,\r | |
217 | \r | |
218 | [EBC entry point arguments]\r | |
219 | [VM stack]\r | |
220 | [EBC stack]\r | |
221 | \r | |
222 | we need to detect all attempts to write to the EBC entry point argument\r | |
223 | stack area and adjust the address (which will initially point into the\r | |
224 | VM stack) to point into the EBC entry point arguments.\r | |
225 | \r | |
226 | @param VmPtr A pointer to a VM context.\r | |
227 | @param Addr Address to write to.\r | |
228 | @param Data Value to write to Addr.\r | |
229 | \r | |
230 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
231 | @retval Other Some error occurs when writing data to the address.\r | |
232 | \r | |
233 | **/\r | |
234 | EFI_STATUS\r | |
235 | VmWriteMem16 (\r | |
236 | IN VM_CONTEXT *VmPtr,\r | |
237 | IN UINTN Addr,\r | |
238 | IN UINT16 Data\r | |
239 | );\r | |
240 | \r | |
241 | /**\r | |
242 | Writes 32-bit data to memory address.\r | |
243 | \r | |
244 | This routine is called by the EBC data\r | |
245 | movement instructions that write to memory. Since these writes\r | |
246 | may be to the stack, which looks like (high address on top) this,\r | |
247 | \r | |
248 | [EBC entry point arguments]\r | |
249 | [VM stack]\r | |
250 | [EBC stack]\r | |
251 | \r | |
252 | we need to detect all attempts to write to the EBC entry point argument\r | |
253 | stack area and adjust the address (which will initially point into the\r | |
254 | VM stack) to point into the EBC entry point arguments.\r | |
255 | \r | |
256 | @param VmPtr A pointer to a VM context.\r | |
257 | @param Addr Address to write to.\r | |
258 | @param Data Value to write to Addr.\r | |
259 | \r | |
260 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
261 | @retval Other Some error occurs when writing data to the address.\r | |
262 | \r | |
263 | **/\r | |
264 | EFI_STATUS\r | |
265 | VmWriteMem32 (\r | |
266 | IN VM_CONTEXT *VmPtr,\r | |
267 | IN UINTN Addr,\r | |
268 | IN UINT32 Data\r | |
269 | );\r | |
270 | \r | |
271 | /**\r | |
272 | Reads 16-bit unsigned data from the code stream.\r | |
273 | \r | |
274 | This routine provides the ability to read raw unsigned data from the code\r | |
275 | stream.\r | |
276 | \r | |
277 | @param VmPtr A pointer to VM context\r | |
278 | @param Offset Offset from current IP to the raw data to read.\r | |
279 | \r | |
280 | @return The raw unsigned 16-bit value from the code stream.\r | |
281 | \r | |
282 | **/\r | |
283 | UINT16\r | |
284 | VmReadCode16 (\r | |
285 | IN VM_CONTEXT *VmPtr,\r | |
286 | IN UINT32 Offset\r | |
287 | );\r | |
288 | \r | |
289 | /**\r | |
290 | Reads 32-bit unsigned data from the code stream.\r | |
291 | \r | |
292 | This routine provides the ability to read raw unsigned data from the code\r | |
293 | stream.\r | |
294 | \r | |
295 | @param VmPtr A pointer to VM context\r | |
296 | @param Offset Offset from current IP to the raw data to read.\r | |
297 | \r | |
298 | @return The raw unsigned 32-bit value from the code stream.\r | |
299 | \r | |
300 | **/\r | |
301 | UINT32\r | |
302 | VmReadCode32 (\r | |
303 | IN VM_CONTEXT *VmPtr,\r | |
304 | IN UINT32 Offset\r | |
305 | );\r | |
306 | \r | |
307 | /**\r | |
308 | Reads 64-bit unsigned data from the code stream.\r | |
309 | \r | |
310 | This routine provides the ability to read raw unsigned data from the code\r | |
311 | stream.\r | |
312 | \r | |
313 | @param VmPtr A pointer to VM context\r | |
314 | @param Offset Offset from current IP to the raw data to read.\r | |
315 | \r | |
316 | @return The raw unsigned 64-bit value from the code stream.\r | |
317 | \r | |
318 | **/\r | |
319 | UINT64\r | |
320 | VmReadCode64 (\r | |
321 | IN VM_CONTEXT *VmPtr,\r | |
322 | IN UINT32 Offset\r | |
323 | );\r | |
324 | \r | |
325 | /**\r | |
326 | Reads 8-bit immediate value at the offset.\r | |
327 | \r | |
328 | This routine is called by the EBC execute\r | |
329 | functions to read EBC immediate values from the code stream.\r | |
330 | Since we can't assume alignment, each tries to read in the biggest\r | |
331 | chunks size available, but will revert to smaller reads if necessary.\r | |
332 | \r | |
333 | @param VmPtr A pointer to a VM context.\r | |
334 | @param Offset offset from IP of the code bytes to read.\r | |
335 | \r | |
336 | @return Signed data of the requested size from the specified address.\r | |
337 | \r | |
338 | **/\r | |
339 | INT8\r | |
340 | VmReadImmed8 (\r | |
341 | IN VM_CONTEXT *VmPtr,\r | |
342 | IN UINT32 Offset\r | |
343 | );\r | |
344 | \r | |
345 | /**\r | |
346 | Reads 16-bit immediate value at the offset.\r | |
347 | \r | |
348 | This routine is called by the EBC execute\r | |
349 | functions to read EBC immediate values from the code stream.\r | |
350 | Since we can't assume alignment, each tries to read in the biggest\r | |
351 | chunks size available, but will revert to smaller reads if necessary.\r | |
352 | \r | |
353 | @param VmPtr A pointer to a VM context.\r | |
354 | @param Offset offset from IP of the code bytes to read.\r | |
355 | \r | |
356 | @return Signed data of the requested size from the specified address.\r | |
357 | \r | |
358 | **/\r | |
359 | INT16\r | |
360 | VmReadImmed16 (\r | |
361 | IN VM_CONTEXT *VmPtr,\r | |
362 | IN UINT32 Offset\r | |
363 | );\r | |
364 | \r | |
365 | /**\r | |
366 | Reads 32-bit immediate value at the offset.\r | |
367 | \r | |
368 | This routine is called by the EBC execute\r | |
369 | functions to read EBC immediate values from the code stream.\r | |
370 | Since we can't assume alignment, each tries to read in the biggest\r | |
371 | chunks size available, but will revert to smaller reads if necessary.\r | |
372 | \r | |
373 | @param VmPtr A pointer to a VM context.\r | |
374 | @param Offset offset from IP of the code bytes to read.\r | |
375 | \r | |
376 | @return Signed data of the requested size from the specified address.\r | |
377 | \r | |
378 | **/\r | |
379 | INT32\r | |
380 | VmReadImmed32 (\r | |
381 | IN VM_CONTEXT *VmPtr,\r | |
382 | IN UINT32 Offset\r | |
383 | );\r | |
384 | \r | |
385 | /**\r | |
386 | Reads 64-bit immediate value at the offset.\r | |
387 | \r | |
388 | This routine is called by the EBC execute\r | |
389 | functions to read EBC immediate values from the code stream.\r | |
390 | Since we can't assume alignment, each tries to read in the biggest\r | |
391 | chunks size available, but will revert to smaller reads if necessary.\r | |
392 | \r | |
393 | @param VmPtr A pointer to a VM context.\r | |
394 | @param Offset offset from IP of the code bytes to read.\r | |
395 | \r | |
396 | @return Signed data of the requested size from the specified address.\r | |
397 | \r | |
398 | **/\r | |
399 | INT64\r | |
400 | VmReadImmed64 (\r | |
401 | IN VM_CONTEXT *VmPtr,\r | |
402 | IN UINT32 Offset\r | |
403 | );\r | |
404 | \r | |
405 | /**\r | |
406 | Given an address that EBC is going to read from or write to, return\r | |
407 | an appropriate address that accounts for a gap in the stack.\r | |
408 | The stack for this application looks like this (high addr on top)\r | |
409 | [EBC entry point arguments]\r | |
410 | [VM stack]\r | |
411 | [EBC stack]\r | |
412 | The EBC assumes that its arguments are at the top of its stack, which\r | |
413 | is where the VM stack is really. Therefore if the EBC does memory\r | |
414 | accesses into the VM stack area, then we need to convert the address\r | |
415 | to point to the EBC entry point arguments area. Do this here.\r | |
416 | \r | |
417 | @param VmPtr A Pointer to VM context.\r | |
418 | @param Addr Address of interest\r | |
419 | \r | |
420 | @return The unchanged address if it's not in the VM stack region. Otherwise,\r | |
421 | adjust for the stack gap and return the modified address.\r | |
422 | \r | |
423 | **/\r | |
424 | UINTN\r | |
425 | ConvertStackAddr (\r | |
426 | IN VM_CONTEXT *VmPtr,\r | |
427 | IN UINTN Addr\r | |
428 | );\r | |
429 | \r | |
430 | /**\r | |
431 | Execute all the EBC data manipulation instructions.\r | |
432 | Since the EBC data manipulation instructions all have the same basic form,\r | |
433 | they can share the code that does the fetch of operands and the write-back\r | |
434 | of the result. This function performs the fetch of the operands (even if\r | |
435 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
436 | appropriate subfunction, then writes back the returned result.\r | |
437 | \r | |
438 | Format:\r | |
439 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
440 | \r | |
441 | @param VmPtr A pointer to VM context.\r | |
442 | @param IsSignedOp Indicates whether the operand is signed or not.\r | |
443 | \r | |
444 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
445 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
446 | \r | |
447 | **/\r | |
448 | EFI_STATUS\r | |
449 | ExecuteDataManip (\r | |
450 | IN VM_CONTEXT *VmPtr,\r | |
451 | IN BOOLEAN IsSignedOp\r | |
452 | );\r | |
453 | \r | |
454 | //\r | |
455 | // Functions that execute VM opcodes\r | |
456 | //\r | |
457 | /**\r | |
458 | Execute the EBC BREAK instruction.\r | |
459 | \r | |
460 | @param VmPtr A pointer to a VM context.\r | |
461 | \r | |
462 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
463 | \r | |
464 | **/\r | |
465 | EFI_STATUS\r | |
466 | ExecuteBREAK (\r | |
467 | IN VM_CONTEXT *VmPtr\r | |
468 | );\r | |
469 | \r | |
470 | /**\r | |
471 | Execute the JMP instruction.\r | |
472 | \r | |
473 | Instruction syntax:\r | |
474 | JMP64{cs|cc} Immed64\r | |
475 | JMP32{cs|cc} {@}R1 {Immed32|Index32}\r | |
476 | \r | |
477 | Encoding:\r | |
478 | b0.7 - immediate data present\r | |
479 | b0.6 - 1 = 64 bit immediate data\r | |
480 | 0 = 32 bit immediate data\r | |
481 | b1.7 - 1 = conditional\r | |
482 | b1.6 1 = CS (condition set)\r | |
483 | 0 = CC (condition clear)\r | |
484 | b1.4 1 = relative address\r | |
485 | 0 = absolute address\r | |
486 | b1.3 1 = operand1 indirect\r | |
487 | b1.2-0 operand 1\r | |
488 | \r | |
489 | @param VmPtr A pointer to a VM context.\r | |
490 | \r | |
491 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
492 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
493 | \r | |
494 | **/\r | |
495 | EFI_STATUS\r | |
496 | ExecuteJMP (\r | |
497 | IN VM_CONTEXT *VmPtr\r | |
498 | );\r | |
499 | \r | |
500 | /**\r | |
501 | Execute the EBC JMP8 instruction.\r | |
502 | \r | |
503 | Instruction syntax:\r | |
504 | JMP8{cs|cc} Offset/2\r | |
505 | \r | |
506 | @param VmPtr A pointer to a VM context.\r | |
507 | \r | |
508 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
509 | \r | |
510 | **/\r | |
511 | EFI_STATUS\r | |
512 | ExecuteJMP8 (\r | |
513 | IN VM_CONTEXT *VmPtr\r | |
514 | );\r | |
515 | \r | |
516 | /**\r | |
517 | Implements the EBC CALL instruction.\r | |
518 | \r | |
519 | Instruction format:\r | |
520 | CALL64 Immed64\r | |
521 | CALL32 {@}R1 {Immed32|Index32}\r | |
522 | CALLEX64 Immed64\r | |
523 | CALLEX16 {@}R1 {Immed32}\r | |
524 | \r | |
525 | If Rx == R0, then it's a PC relative call to PC = PC + imm32.\r | |
526 | \r | |
527 | @param VmPtr A pointer to a VM context.\r | |
528 | \r | |
529 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
530 | \r | |
531 | **/\r | |
532 | EFI_STATUS\r | |
533 | ExecuteCALL (\r | |
534 | IN VM_CONTEXT *VmPtr\r | |
535 | );\r | |
536 | \r | |
537 | /**\r | |
538 | Execute the EBC RET instruction.\r | |
539 | \r | |
540 | Instruction syntax:\r | |
541 | RET\r | |
542 | \r | |
543 | @param VmPtr A pointer to a VM context.\r | |
544 | \r | |
545 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
546 | \r | |
547 | **/\r | |
548 | EFI_STATUS\r | |
549 | ExecuteRET (\r | |
550 | IN VM_CONTEXT *VmPtr\r | |
551 | );\r | |
552 | \r | |
553 | /**\r | |
554 | Execute the EBC CMP instruction.\r | |
555 | \r | |
556 | Instruction syntax:\r | |
557 | CMP[32|64][eq|lte|gte|ulte|ugte] R1, {@}R2 {Index16|Immed16}\r | |
558 | \r | |
559 | @param VmPtr A pointer to a VM context.\r | |
560 | \r | |
561 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
562 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
563 | \r | |
564 | **/\r | |
565 | EFI_STATUS\r | |
566 | ExecuteCMP (\r | |
567 | IN VM_CONTEXT *VmPtr\r | |
568 | );\r | |
569 | \r | |
570 | /**\r | |
571 | Execute the EBC CMPI instruction\r | |
572 | \r | |
573 | Instruction syntax:\r | |
574 | CMPI[32|64]{w|d}[eq|lte|gte|ulte|ugte] {@}Rx {Index16}, Immed16|Immed32\r | |
575 | \r | |
576 | @param VmPtr A pointer to a VM context.\r | |
577 | \r | |
578 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
579 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
580 | \r | |
581 | **/\r | |
582 | EFI_STATUS\r | |
583 | ExecuteCMPI (\r | |
584 | IN VM_CONTEXT *VmPtr\r | |
585 | );\r | |
586 | \r | |
587 | /**\r | |
588 | Execute the MOVxx instructions.\r | |
589 | \r | |
590 | Instruction format:\r | |
591 | \r | |
592 | MOV[b|w|d|q|n]{w|d} {@}R1 {Index16|32}, {@}R2 {Index16|32}\r | |
593 | MOVqq {@}R1 {Index64}, {@}R2 {Index64}\r | |
594 | \r | |
595 | Copies contents of [R2] -> [R1], zero extending where required.\r | |
596 | \r | |
597 | First character indicates the size of the move.\r | |
598 | Second character indicates the size of the index(s).\r | |
599 | \r | |
600 | Invalid to have R1 direct with index.\r | |
601 | \r | |
602 | @param VmPtr A pointer to a VM context.\r | |
603 | \r | |
604 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
605 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
606 | \r | |
607 | **/\r | |
608 | EFI_STATUS\r | |
609 | ExecuteMOVxx (\r | |
610 | IN VM_CONTEXT *VmPtr\r | |
611 | );\r | |
612 | \r | |
613 | /**\r | |
614 | Execute the EBC MOVI.\r | |
615 | \r | |
616 | Instruction syntax:\r | |
617 | \r | |
618 | MOVI[b|w|d|q][w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
619 | \r | |
620 | First variable character specifies the move size\r | |
621 | Second variable character specifies size of the immediate data\r | |
622 | \r | |
623 | Sign-extend the immediate data to the size of the operation, and zero-extend\r | |
624 | if storing to a register.\r | |
625 | \r | |
626 | Operand1 direct with index/immed is invalid.\r | |
627 | \r | |
628 | @param VmPtr A pointer to a VM context.\r | |
629 | \r | |
630 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
631 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
632 | \r | |
633 | **/\r | |
634 | EFI_STATUS\r | |
635 | ExecuteMOVI (\r | |
636 | IN VM_CONTEXT *VmPtr\r | |
637 | );\r | |
638 | \r | |
639 | /**\r | |
640 | Execute the EBC MOV immediate natural. This instruction moves an immediate\r | |
641 | index value into a register or memory location.\r | |
642 | \r | |
643 | Instruction syntax:\r | |
644 | \r | |
645 | MOVIn[w|d|q] {@}R1 {Index16}, Index16|32|64\r | |
646 | \r | |
647 | @param VmPtr A pointer to a VM context.\r | |
648 | \r | |
649 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
650 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
651 | \r | |
652 | **/\r | |
653 | EFI_STATUS\r | |
654 | ExecuteMOVIn (\r | |
655 | IN VM_CONTEXT *VmPtr\r | |
656 | );\r | |
657 | \r | |
658 | /**\r | |
659 | Execute the EBC MOVREL instruction.\r | |
660 | Dest <- Ip + ImmData\r | |
661 | \r | |
662 | Instruction syntax:\r | |
663 | \r | |
664 | MOVREL[w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
665 | \r | |
666 | @param VmPtr A pointer to a VM context.\r | |
667 | \r | |
668 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
669 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
670 | \r | |
671 | **/\r | |
672 | EFI_STATUS\r | |
673 | ExecuteMOVREL (\r | |
674 | IN VM_CONTEXT *VmPtr\r | |
675 | );\r | |
676 | \r | |
677 | /**\r | |
678 | Execute the EBC PUSHn instruction\r | |
679 | \r | |
680 | Instruction syntax:\r | |
681 | PUSHn {@}R1 {Index16|Immed16}\r | |
682 | \r | |
683 | @param VmPtr A pointer to a VM context.\r | |
684 | \r | |
685 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
686 | \r | |
687 | **/\r | |
688 | EFI_STATUS\r | |
689 | ExecutePUSHn (\r | |
690 | IN VM_CONTEXT *VmPtr\r | |
691 | );\r | |
692 | \r | |
693 | /**\r | |
694 | Execute the EBC PUSH instruction.\r | |
695 | \r | |
696 | Instruction syntax:\r | |
697 | PUSH[32|64] {@}R1 {Index16|Immed16}\r | |
698 | \r | |
699 | @param VmPtr A pointer to a VM context.\r | |
700 | \r | |
701 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
702 | \r | |
703 | **/\r | |
704 | EFI_STATUS\r | |
705 | ExecutePUSH (\r | |
706 | IN VM_CONTEXT *VmPtr\r | |
707 | );\r | |
708 | \r | |
709 | /**\r | |
710 | Execute the EBC POPn instruction.\r | |
711 | \r | |
712 | Instruction syntax:\r | |
713 | POPn {@}R1 {Index16|Immed16}\r | |
714 | \r | |
715 | @param VmPtr A pointer to a VM context.\r | |
716 | \r | |
717 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
718 | \r | |
719 | **/\r | |
720 | EFI_STATUS\r | |
721 | ExecutePOPn (\r | |
722 | IN VM_CONTEXT *VmPtr\r | |
723 | );\r | |
724 | \r | |
725 | /**\r | |
726 | Execute the EBC POP instruction.\r | |
727 | \r | |
728 | Instruction syntax:\r | |
729 | POPn {@}R1 {Index16|Immed16}\r | |
730 | \r | |
731 | @param VmPtr A pointer to a VM context.\r | |
732 | \r | |
733 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
734 | \r | |
735 | **/\r | |
736 | EFI_STATUS\r | |
737 | ExecutePOP (\r | |
738 | IN VM_CONTEXT *VmPtr\r | |
739 | );\r | |
740 | \r | |
741 | /**\r | |
742 | Execute all the EBC signed data manipulation instructions.\r | |
743 | Since the EBC data manipulation instructions all have the same basic form,\r | |
744 | they can share the code that does the fetch of operands and the write-back\r | |
745 | of the result. This function performs the fetch of the operands (even if\r | |
746 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
747 | appropriate subfunction, then writes back the returned result.\r | |
748 | \r | |
749 | Format:\r | |
750 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
751 | \r | |
752 | @param VmPtr A pointer to VM context.\r | |
753 | \r | |
754 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
755 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
756 | \r | |
757 | **/\r | |
758 | EFI_STATUS\r | |
759 | ExecuteSignedDataManip (\r | |
760 | IN VM_CONTEXT *VmPtr\r | |
761 | );\r | |
762 | \r | |
763 | /**\r | |
764 | Execute all the EBC unsigned data manipulation instructions.\r | |
765 | Since the EBC data manipulation instructions all have the same basic form,\r | |
766 | they can share the code that does the fetch of operands and the write-back\r | |
767 | of the result. This function performs the fetch of the operands (even if\r | |
768 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
769 | appropriate subfunction, then writes back the returned result.\r | |
770 | \r | |
771 | Format:\r | |
772 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
773 | \r | |
774 | @param VmPtr A pointer to VM context.\r | |
775 | \r | |
776 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
777 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
778 | \r | |
779 | **/\r | |
780 | EFI_STATUS\r | |
781 | ExecuteUnsignedDataManip (\r | |
782 | IN VM_CONTEXT *VmPtr\r | |
783 | );\r | |
784 | \r | |
785 | /**\r | |
786 | Execute the EBC LOADSP instruction.\r | |
787 | \r | |
788 | Instruction syntax:\r | |
789 | LOADSP SP1, R2\r | |
790 | \r | |
791 | @param VmPtr A pointer to a VM context.\r | |
792 | \r | |
793 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
794 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
795 | \r | |
796 | **/\r | |
797 | EFI_STATUS\r | |
798 | ExecuteLOADSP (\r | |
799 | IN VM_CONTEXT *VmPtr\r | |
800 | );\r | |
801 | \r | |
802 | /**\r | |
803 | Execute the EBC STORESP instruction.\r | |
804 | \r | |
805 | Instruction syntax:\r | |
806 | STORESP Rx, FLAGS|IP\r | |
807 | \r | |
808 | @param VmPtr A pointer to a VM context.\r | |
809 | \r | |
810 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
811 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
812 | \r | |
813 | **/\r | |
814 | EFI_STATUS\r | |
815 | ExecuteSTORESP (\r | |
816 | IN VM_CONTEXT *VmPtr\r | |
817 | );\r | |
818 | \r | |
819 | /**\r | |
820 | Execute the EBC MOVsnw instruction. This instruction loads a signed\r | |
821 | natural value from memory or register to another memory or register. On\r | |
822 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
823 | is a register.\r | |
824 | \r | |
825 | Instruction syntax:\r | |
826 | \r | |
827 | MOVsnd {@}R1 {Indx32}, {@}R2 {Index32|Immed32}\r | |
828 | \r | |
829 | 0:7 1=>operand1 index present\r | |
830 | 0:6 1=>operand2 index present\r | |
831 | \r | |
832 | @param VmPtr A pointer to a VM context.\r | |
833 | \r | |
834 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
835 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
836 | \r | |
837 | **/\r | |
838 | EFI_STATUS\r | |
839 | ExecuteMOVsnd (\r | |
840 | IN VM_CONTEXT *VmPtr\r | |
841 | );\r | |
842 | \r | |
843 | /**\r | |
844 | Execute the EBC MOVsnw instruction. This instruction loads a signed\r | |
845 | natural value from memory or register to another memory or register. On\r | |
846 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
847 | is a register.\r | |
848 | \r | |
849 | Instruction syntax:\r | |
850 | \r | |
851 | MOVsnw {@}R1 {Index16}, {@}R2 {Index16|Immed16}\r | |
852 | \r | |
853 | 0:7 1=>operand1 index present\r | |
854 | 0:6 1=>operand2 index present\r | |
855 | \r | |
856 | @param VmPtr A pointer to a VM context.\r | |
857 | \r | |
858 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
859 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
860 | \r | |
861 | **/\r | |
862 | EFI_STATUS\r | |
863 | ExecuteMOVsnw (\r | |
864 | IN VM_CONTEXT *VmPtr\r | |
865 | );\r | |
866 | \r | |
867 | //\r | |
868 | // Data manipulation subfunctions\r | |
869 | //\r | |
870 | /**\r | |
871 | Execute the EBC NOT instruction.s\r | |
872 | \r | |
873 | Instruction syntax:\r | |
874 | NOT[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
875 | \r | |
876 | @param VmPtr A pointer to a VM context.\r | |
877 | @param Op1 Operand 1 from the instruction\r | |
878 | @param Op2 Operand 2 from the instruction\r | |
879 | \r | |
880 | @return ~Op2\r | |
881 | \r | |
882 | **/\r | |
883 | UINT64\r | |
884 | ExecuteNOT (\r | |
885 | IN VM_CONTEXT *VmPtr,\r | |
886 | IN UINT64 Op1,\r | |
887 | IN UINT64 Op2\r | |
888 | );\r | |
889 | \r | |
890 | /**\r | |
891 | Execute the EBC NEG instruction.\r | |
892 | \r | |
893 | Instruction syntax:\r | |
894 | NEG[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
895 | \r | |
896 | @param VmPtr A pointer to a VM context.\r | |
897 | @param Op1 Operand 1 from the instruction\r | |
898 | @param Op2 Operand 2 from the instruction\r | |
899 | \r | |
900 | @return Op2 * -1\r | |
901 | \r | |
902 | **/\r | |
903 | UINT64\r | |
904 | ExecuteNEG (\r | |
905 | IN VM_CONTEXT *VmPtr,\r | |
906 | IN UINT64 Op1,\r | |
907 | IN UINT64 Op2\r | |
908 | );\r | |
909 | \r | |
910 | /**\r | |
911 | Execute the EBC ADD instruction.\r | |
912 | \r | |
913 | Instruction syntax:\r | |
914 | ADD[32|64] {@}R1, {@}R2 {Index16}\r | |
915 | \r | |
916 | @param VmPtr A pointer to a VM context.\r | |
917 | @param Op1 Operand 1 from the instruction\r | |
918 | @param Op2 Operand 2 from the instruction\r | |
919 | \r | |
920 | @return Op1 + Op2\r | |
921 | \r | |
922 | **/\r | |
923 | UINT64\r | |
924 | ExecuteADD (\r | |
925 | IN VM_CONTEXT *VmPtr,\r | |
926 | IN UINT64 Op1,\r | |
927 | IN UINT64 Op2\r | |
928 | );\r | |
929 | \r | |
930 | /**\r | |
931 | Execute the EBC SUB instruction.\r | |
932 | \r | |
933 | Instruction syntax:\r | |
934 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
935 | \r | |
936 | @param VmPtr A pointer to a VM context.\r | |
937 | @param Op1 Operand 1 from the instruction\r | |
938 | @param Op2 Operand 2 from the instruction\r | |
939 | \r | |
940 | @return Op1 - Op2\r | |
941 | \r | |
942 | **/\r | |
943 | UINT64\r | |
944 | ExecuteSUB (\r | |
945 | IN VM_CONTEXT *VmPtr,\r | |
946 | IN UINT64 Op1,\r | |
947 | IN UINT64 Op2\r | |
948 | );\r | |
949 | \r | |
950 | /**\r | |
951 | Execute the EBC MUL instruction.\r | |
952 | \r | |
953 | Instruction syntax:\r | |
954 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
955 | \r | |
956 | @param VmPtr A pointer to a VM context.\r | |
957 | @param Op1 Operand 1 from the instruction\r | |
958 | @param Op2 Operand 2 from the instruction\r | |
959 | \r | |
960 | @return Op1 * Op2\r | |
961 | \r | |
962 | **/\r | |
963 | UINT64\r | |
964 | ExecuteMUL (\r | |
965 | IN VM_CONTEXT *VmPtr,\r | |
966 | IN UINT64 Op1,\r | |
967 | IN UINT64 Op2\r | |
968 | );\r | |
969 | \r | |
970 | /**\r | |
971 | Execute the EBC MULU instruction\r | |
972 | \r | |
973 | Instruction syntax:\r | |
974 | MULU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
975 | \r | |
976 | @param VmPtr A pointer to a VM context.\r | |
977 | @param Op1 Operand 1 from the instruction\r | |
978 | @param Op2 Operand 2 from the instruction\r | |
979 | \r | |
980 | @return (unsigned)Op1 * (unsigned)Op2\r | |
981 | \r | |
982 | **/\r | |
983 | UINT64\r | |
984 | ExecuteMULU (\r | |
985 | IN VM_CONTEXT *VmPtr,\r | |
986 | IN UINT64 Op1,\r | |
987 | IN UINT64 Op2\r | |
988 | );\r | |
989 | \r | |
990 | /**\r | |
991 | Execute the EBC DIV instruction.\r | |
992 | \r | |
993 | Instruction syntax:\r | |
994 | DIV[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
995 | \r | |
996 | @param VmPtr A pointer to a VM context.\r | |
997 | @param Op1 Operand 1 from the instruction\r | |
998 | @param Op2 Operand 2 from the instruction\r | |
999 | \r | |
1000 | @return Op1 / Op2\r | |
1001 | \r | |
1002 | **/\r | |
1003 | UINT64\r | |
1004 | ExecuteDIV (\r | |
1005 | IN VM_CONTEXT *VmPtr,\r | |
1006 | IN UINT64 Op1,\r | |
1007 | IN UINT64 Op2\r | |
1008 | );\r | |
1009 | \r | |
1010 | /**\r | |
1011 | Execute the EBC DIVU instruction\r | |
1012 | \r | |
1013 | Instruction syntax:\r | |
1014 | DIVU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1015 | \r | |
1016 | @param VmPtr A pointer to a VM context.\r | |
1017 | @param Op1 Operand 1 from the instruction\r | |
1018 | @param Op2 Operand 2 from the instruction\r | |
1019 | \r | |
1020 | @return (unsigned)Op1 / (unsigned)Op2\r | |
1021 | \r | |
1022 | **/\r | |
1023 | UINT64\r | |
1024 | ExecuteDIVU (\r | |
1025 | IN VM_CONTEXT *VmPtr,\r | |
1026 | IN UINT64 Op1,\r | |
1027 | IN UINT64 Op2\r | |
1028 | );\r | |
1029 | \r | |
1030 | /**\r | |
1031 | Execute the EBC MOD instruction.\r | |
1032 | \r | |
1033 | Instruction syntax:\r | |
1034 | MOD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1035 | \r | |
1036 | @param VmPtr A pointer to a VM context.\r | |
1037 | @param Op1 Operand 1 from the instruction\r | |
1038 | @param Op2 Operand 2 from the instruction\r | |
1039 | \r | |
1040 | @return Op1 MODULUS Op2\r | |
1041 | \r | |
1042 | **/\r | |
1043 | UINT64\r | |
1044 | ExecuteMOD (\r | |
1045 | IN VM_CONTEXT *VmPtr,\r | |
1046 | IN UINT64 Op1,\r | |
1047 | IN UINT64 Op2\r | |
1048 | );\r | |
1049 | \r | |
1050 | /**\r | |
1051 | Execute the EBC MODU instruction.\r | |
1052 | \r | |
1053 | Instruction syntax:\r | |
1054 | MODU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1055 | \r | |
1056 | @param VmPtr A pointer to a VM context.\r | |
1057 | @param Op1 Operand 1 from the instruction\r | |
1058 | @param Op2 Operand 2 from the instruction\r | |
1059 | \r | |
1060 | @return Op1 UNSIGNED_MODULUS Op2\r | |
1061 | \r | |
1062 | **/\r | |
1063 | UINT64\r | |
1064 | ExecuteMODU (\r | |
1065 | IN VM_CONTEXT *VmPtr,\r | |
1066 | IN UINT64 Op1,\r | |
1067 | IN UINT64 Op2\r | |
1068 | );\r | |
1069 | \r | |
1070 | /**\r | |
1071 | Execute the EBC AND instruction.\r | |
1072 | \r | |
1073 | Instruction syntax:\r | |
1074 | AND[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1075 | \r | |
1076 | @param VmPtr A pointer to a VM context.\r | |
1077 | @param Op1 Operand 1 from the instruction\r | |
1078 | @param Op2 Operand 2 from the instruction\r | |
1079 | \r | |
1080 | @return Op1 AND Op2\r | |
1081 | \r | |
1082 | **/\r | |
1083 | UINT64\r | |
1084 | ExecuteAND (\r | |
1085 | IN VM_CONTEXT *VmPtr,\r | |
1086 | IN UINT64 Op1,\r | |
1087 | IN UINT64 Op2\r | |
1088 | );\r | |
1089 | \r | |
1090 | /**\r | |
1091 | Execute the EBC OR instruction.\r | |
1092 | \r | |
1093 | Instruction syntax:\r | |
1094 | OR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1095 | \r | |
1096 | @param VmPtr A pointer to a VM context.\r | |
1097 | @param Op1 Operand 1 from the instruction\r | |
1098 | @param Op2 Operand 2 from the instruction\r | |
1099 | \r | |
1100 | @return Op1 OR Op2\r | |
1101 | \r | |
1102 | **/\r | |
1103 | UINT64\r | |
1104 | ExecuteOR (\r | |
1105 | IN VM_CONTEXT *VmPtr,\r | |
1106 | IN UINT64 Op1,\r | |
1107 | IN UINT64 Op2\r | |
1108 | );\r | |
1109 | \r | |
1110 | /**\r | |
1111 | Execute the EBC XOR instruction.\r | |
1112 | \r | |
1113 | Instruction syntax:\r | |
1114 | XOR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1115 | \r | |
1116 | @param VmPtr A pointer to a VM context.\r | |
1117 | @param Op1 Operand 1 from the instruction\r | |
1118 | @param Op2 Operand 2 from the instruction\r | |
1119 | \r | |
1120 | @return Op1 XOR Op2\r | |
1121 | \r | |
1122 | **/\r | |
1123 | UINT64\r | |
1124 | ExecuteXOR (\r | |
1125 | IN VM_CONTEXT *VmPtr,\r | |
1126 | IN UINT64 Op1,\r | |
1127 | IN UINT64 Op2\r | |
1128 | );\r | |
1129 | \r | |
1130 | /**\r | |
1131 | Execute the EBC SHL shift left instruction.\r | |
1132 | \r | |
1133 | Instruction syntax:\r | |
1134 | SHL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1135 | \r | |
1136 | @param VmPtr A pointer to a VM context.\r | |
1137 | @param Op1 Operand 1 from the instruction\r | |
1138 | @param Op2 Operand 2 from the instruction\r | |
1139 | \r | |
1140 | @return Op1 << Op2\r | |
1141 | \r | |
1142 | **/\r | |
1143 | UINT64\r | |
1144 | ExecuteSHL (\r | |
1145 | IN VM_CONTEXT *VmPtr,\r | |
1146 | IN UINT64 Op1,\r | |
1147 | IN UINT64 Op2\r | |
1148 | );\r | |
1149 | \r | |
1150 | /**\r | |
1151 | Execute the EBC SHR instruction.\r | |
1152 | \r | |
1153 | Instruction syntax:\r | |
1154 | SHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1155 | \r | |
1156 | @param VmPtr A pointer to a VM context.\r | |
1157 | @param Op1 Operand 1 from the instruction\r | |
1158 | @param Op2 Operand 2 from the instruction\r | |
1159 | \r | |
1160 | @return Op1 >> Op2 (unsigned operands)\r | |
1161 | \r | |
1162 | **/\r | |
1163 | UINT64\r | |
1164 | ExecuteSHR (\r | |
1165 | IN VM_CONTEXT *VmPtr,\r | |
1166 | IN UINT64 Op1,\r | |
1167 | IN UINT64 Op2\r | |
1168 | );\r | |
1169 | \r | |
1170 | /**\r | |
1171 | Execute the EBC ASHR instruction.\r | |
1172 | \r | |
1173 | Instruction syntax:\r | |
1174 | ASHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1175 | \r | |
1176 | @param VmPtr A pointer to a VM context.\r | |
1177 | @param Op1 Operand 1 from the instruction\r | |
1178 | @param Op2 Operand 2 from the instruction\r | |
1179 | \r | |
1180 | @return Op1 >> Op2 (signed)\r | |
1181 | \r | |
1182 | **/\r | |
1183 | UINT64\r | |
1184 | ExecuteASHR (\r | |
1185 | IN VM_CONTEXT *VmPtr,\r | |
1186 | IN UINT64 Op1,\r | |
1187 | IN UINT64 Op2\r | |
1188 | );\r | |
1189 | \r | |
1190 | /**\r | |
1191 | Execute the EBC EXTNDB instruction to sign-extend a byte value.\r | |
1192 | \r | |
1193 | Instruction syntax:\r | |
1194 | EXTNDB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1195 | \r | |
1196 | @param VmPtr A pointer to a VM context.\r | |
1197 | @param Op1 Operand 1 from the instruction\r | |
1198 | @param Op2 Operand 2 from the instruction\r | |
1199 | \r | |
1200 | @return (INT64)(INT8)Op2\r | |
1201 | \r | |
1202 | **/\r | |
1203 | UINT64\r | |
1204 | ExecuteEXTNDB (\r | |
1205 | IN VM_CONTEXT *VmPtr,\r | |
1206 | IN UINT64 Op1,\r | |
1207 | IN UINT64 Op2\r | |
1208 | );\r | |
1209 | \r | |
1210 | /**\r | |
1211 | Execute the EBC EXTNDW instruction to sign-extend a 16-bit value.\r | |
1212 | \r | |
1213 | Instruction syntax:\r | |
1214 | EXTNDW[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1215 | \r | |
1216 | @param VmPtr A pointer to a VM context.\r | |
1217 | @param Op1 Operand 1 from the instruction\r | |
1218 | @param Op2 Operand 2 from the instruction\r | |
1219 | \r | |
1220 | @return (INT64)(INT16)Op2\r | |
1221 | \r | |
1222 | **/\r | |
1223 | UINT64\r | |
1224 | ExecuteEXTNDW (\r | |
1225 | IN VM_CONTEXT *VmPtr,\r | |
1226 | IN UINT64 Op1,\r | |
1227 | IN UINT64 Op2\r | |
1228 | );\r | |
1229 | \r | |
1230 | /**\r | |
1231 | Execute the EBC EXTNDD instruction to sign-extend a 32-bit value.\r | |
1232 | \r | |
1233 | Instruction syntax:\r | |
1234 | EXTNDD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1235 | \r | |
1236 | @param VmPtr A pointer to a VM context.\r | |
1237 | @param Op1 Operand 1 from the instruction\r | |
1238 | @param Op2 Operand 2 from the instruction\r | |
1239 | \r | |
1240 | @return (INT64)(INT32)Op2\r | |
1241 | \r | |
1242 | **/\r | |
1243 | UINT64\r | |
1244 | ExecuteEXTNDD (\r | |
1245 | IN VM_CONTEXT *VmPtr,\r | |
1246 | IN UINT64 Op1,\r | |
1247 | IN UINT64 Op2\r | |
1248 | );\r | |
1249 | \r | |
1250 | //\r | |
1251 | // Once we retrieve the operands for the data manipulation instructions,\r | |
1252 | // call these functions to perform the operation.\r | |
1253 | //\r | |
1254 | CONST DATA_MANIP_EXEC_FUNCTION mDataManipDispatchTable[] = {\r | |
1255 | ExecuteNOT,\r | |
1256 | ExecuteNEG,\r | |
1257 | ExecuteADD,\r | |
1258 | ExecuteSUB,\r | |
1259 | ExecuteMUL,\r | |
1260 | ExecuteMULU,\r | |
1261 | ExecuteDIV,\r | |
1262 | ExecuteDIVU,\r | |
1263 | ExecuteMOD,\r | |
1264 | ExecuteMODU,\r | |
1265 | ExecuteAND,\r | |
1266 | ExecuteOR,\r | |
1267 | ExecuteXOR,\r | |
1268 | ExecuteSHL,\r | |
1269 | ExecuteSHR,\r | |
1270 | ExecuteASHR,\r | |
1271 | ExecuteEXTNDB,\r | |
1272 | ExecuteEXTNDW,\r | |
1273 | ExecuteEXTNDD,\r | |
1274 | };\r | |
1275 | \r | |
1276 | CONST VM_TABLE_ENTRY mVmOpcodeTable[] = {\r | |
1277 | { ExecuteBREAK }, // opcode 0x00\r | |
1278 | { ExecuteJMP }, // opcode 0x01\r | |
1279 | { ExecuteJMP8 }, // opcode 0x02\r | |
1280 | { ExecuteCALL }, // opcode 0x03\r | |
1281 | { ExecuteRET }, // opcode 0x04\r | |
1282 | { ExecuteCMP }, // opcode 0x05 CMPeq\r | |
1283 | { ExecuteCMP }, // opcode 0x06 CMPlte\r | |
1284 | { ExecuteCMP }, // opcode 0x07 CMPgte\r | |
1285 | { ExecuteCMP }, // opcode 0x08 CMPulte\r | |
1286 | { ExecuteCMP }, // opcode 0x09 CMPugte\r | |
1287 | { ExecuteUnsignedDataManip }, // opcode 0x0A NOT\r | |
1288 | { ExecuteSignedDataManip }, // opcode 0x0B NEG\r | |
1289 | { ExecuteSignedDataManip }, // opcode 0x0C ADD\r | |
1290 | { ExecuteSignedDataManip }, // opcode 0x0D SUB\r | |
1291 | { ExecuteSignedDataManip }, // opcode 0x0E MUL\r | |
1292 | { ExecuteUnsignedDataManip }, // opcode 0x0F MULU\r | |
1293 | { ExecuteSignedDataManip }, // opcode 0x10 DIV\r | |
1294 | { ExecuteUnsignedDataManip }, // opcode 0x11 DIVU\r | |
1295 | { ExecuteSignedDataManip }, // opcode 0x12 MOD\r | |
1296 | { ExecuteUnsignedDataManip }, // opcode 0x13 MODU\r | |
1297 | { ExecuteUnsignedDataManip }, // opcode 0x14 AND\r | |
1298 | { ExecuteUnsignedDataManip }, // opcode 0x15 OR\r | |
1299 | { ExecuteUnsignedDataManip }, // opcode 0x16 XOR\r | |
1300 | { ExecuteUnsignedDataManip }, // opcode 0x17 SHL\r | |
1301 | { ExecuteUnsignedDataManip }, // opcode 0x18 SHR\r | |
1302 | { ExecuteSignedDataManip }, // opcode 0x19 ASHR\r | |
1303 | { ExecuteUnsignedDataManip }, // opcode 0x1A EXTNDB\r | |
1304 | { ExecuteUnsignedDataManip }, // opcode 0x1B EXTNDW\r | |
1305 | { ExecuteUnsignedDataManip }, // opcode 0x1C EXTNDD\r | |
1306 | { ExecuteMOVxx }, // opcode 0x1D MOVBW\r | |
1307 | { ExecuteMOVxx }, // opcode 0x1E MOVWW\r | |
1308 | { ExecuteMOVxx }, // opcode 0x1F MOVDW\r | |
1309 | { ExecuteMOVxx }, // opcode 0x20 MOVQW\r | |
1310 | { ExecuteMOVxx }, // opcode 0x21 MOVBD\r | |
1311 | { ExecuteMOVxx }, // opcode 0x22 MOVWD\r | |
1312 | { ExecuteMOVxx }, // opcode 0x23 MOVDD\r | |
1313 | { ExecuteMOVxx }, // opcode 0x24 MOVQD\r | |
1314 | { ExecuteMOVsnw }, // opcode 0x25 MOVsnw\r | |
1315 | { ExecuteMOVsnd }, // opcode 0x26 MOVsnd\r | |
1316 | { NULL }, // opcode 0x27\r | |
1317 | { ExecuteMOVxx }, // opcode 0x28 MOVqq\r | |
1318 | { ExecuteLOADSP }, // opcode 0x29 LOADSP SP1, R2\r | |
1319 | { ExecuteSTORESP }, // opcode 0x2A STORESP R1, SP2\r | |
1320 | { ExecutePUSH }, // opcode 0x2B PUSH {@}R1 [imm16]\r | |
1321 | { ExecutePOP }, // opcode 0x2C POP {@}R1 [imm16]\r | |
1322 | { ExecuteCMPI }, // opcode 0x2D CMPIEQ\r | |
1323 | { ExecuteCMPI }, // opcode 0x2E CMPILTE\r | |
1324 | { ExecuteCMPI }, // opcode 0x2F CMPIGTE\r | |
1325 | { ExecuteCMPI }, // opcode 0x30 CMPIULTE\r | |
1326 | { ExecuteCMPI }, // opcode 0x31 CMPIUGTE\r | |
1327 | { ExecuteMOVxx }, // opcode 0x32 MOVN\r | |
1328 | { ExecuteMOVxx }, // opcode 0x33 MOVND\r | |
1329 | { NULL }, // opcode 0x34\r | |
1330 | { ExecutePUSHn }, // opcode 0x35\r | |
1331 | { ExecutePOPn }, // opcode 0x36\r | |
1332 | { ExecuteMOVI }, // opcode 0x37 - mov immediate data\r | |
1333 | { ExecuteMOVIn }, // opcode 0x38 - mov immediate natural\r | |
1334 | { ExecuteMOVREL }, // opcode 0x39 - move data relative to PC\r | |
1335 | { NULL }, // opcode 0x3a\r | |
1336 | { NULL }, // opcode 0x3b\r | |
1337 | { NULL }, // opcode 0x3c\r | |
1338 | { NULL }, // opcode 0x3d\r | |
1339 | { NULL }, // opcode 0x3e\r | |
1340 | { NULL } // opcode 0x3f\r | |
1341 | };\r | |
1342 | \r | |
1343 | //\r | |
1344 | // Length of JMP instructions, depending on upper two bits of opcode.\r | |
1345 | //\r | |
1346 | CONST UINT8 mJMPLen[] = { 2, 2, 6, 10 };\r | |
1347 | \r | |
1348 | /**\r | |
1349 | Given a pointer to a new VM context, execute one or more instructions. This\r | |
1350 | function is only used for test purposes via the EBC VM test protocol.\r | |
1351 | \r | |
1352 | @param This A pointer to the EFI_EBC_VM_TEST_PROTOCOL structure.\r | |
1353 | @param VmPtr A pointer to a VM context.\r | |
1354 | @param InstructionCount A pointer to a UINTN value holding the number of\r | |
1355 | instructions to execute. If it holds value of 0,\r | |
1356 | then the instruction to be executed is 1.\r | |
1357 | \r | |
1358 | @retval EFI_UNSUPPORTED At least one of the opcodes is not supported.\r | |
1359 | @retval EFI_SUCCESS All of the instructions are executed successfully.\r | |
1360 | \r | |
1361 | **/\r | |
1362 | EFI_STATUS\r | |
1363 | EFIAPI\r | |
1364 | EbcExecuteInstructions (\r | |
1365 | IN EFI_EBC_VM_TEST_PROTOCOL *This,\r | |
1366 | IN VM_CONTEXT *VmPtr,\r | |
1367 | IN OUT UINTN *InstructionCount\r | |
1368 | )\r | |
1369 | {\r | |
1370 | UINTN ExecFunc;\r | |
1371 | EFI_STATUS Status;\r | |
1372 | UINTN InstructionsLeft;\r | |
1373 | UINTN SavedInstructionCount;\r | |
1374 | \r | |
1375 | Status = EFI_SUCCESS;\r | |
1376 | \r | |
1377 | if (*InstructionCount == 0) {\r | |
1378 | InstructionsLeft = 1;\r | |
1379 | } else {\r | |
1380 | InstructionsLeft = *InstructionCount;\r | |
1381 | }\r | |
1382 | \r | |
1383 | SavedInstructionCount = *InstructionCount;\r | |
1384 | *InstructionCount = 0;\r | |
1385 | \r | |
1386 | //\r | |
1387 | // Index into the opcode table using the opcode byte for this instruction.\r | |
1388 | // This gives you the execute function, which we first test for null, then\r | |
1389 | // call it if it's not null.\r | |
1390 | //\r | |
1391 | while (InstructionsLeft != 0) {\r | |
1392 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction;\r | |
1393 | if (ExecFunc == (UINTN) NULL) {\r | |
1394 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1395 | return EFI_UNSUPPORTED;\r | |
1396 | } else {\r | |
1397 | mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction (VmPtr);\r | |
1398 | *InstructionCount = *InstructionCount + 1;\r | |
1399 | }\r | |
1400 | \r | |
1401 | //\r | |
1402 | // Decrement counter if applicable\r | |
1403 | //\r | |
1404 | if (SavedInstructionCount != 0) {\r | |
1405 | InstructionsLeft--;\r | |
1406 | }\r | |
1407 | }\r | |
1408 | \r | |
1409 | return Status;\r | |
1410 | }\r | |
1411 | \r | |
1412 | \r | |
1413 | /**\r | |
1414 | Execute an EBC image from an entry point or from a published protocol.\r | |
1415 | \r | |
1416 | @param VmPtr A pointer to a VM context.\r | |
1417 | \r | |
1418 | @retval EFI_UNSUPPORTED At least one of the opcodes is not supported.\r | |
1419 | @retval EFI_SUCCESS All of the instructions are executed successfully.\r | |
1420 | \r | |
1421 | **/\r | |
1422 | EFI_STATUS\r | |
1423 | EbcExecute (\r | |
1424 | IN VM_CONTEXT *VmPtr\r | |
1425 | )\r | |
1426 | {\r | |
1427 | UINTN ExecFunc;\r | |
1428 | UINT8 StackCorrupted;\r | |
1429 | EFI_STATUS Status;\r | |
1430 | EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL *EbcSimpleDebugger;\r | |
1431 | \r | |
1432 | mVmPtr = VmPtr;\r | |
1433 | EbcSimpleDebugger = NULL;\r | |
1434 | Status = EFI_SUCCESS;\r | |
1435 | StackCorrupted = 0;\r | |
1436 | \r | |
1437 | //\r | |
1438 | // Make sure the magic value has been put on the stack before we got here.\r | |
1439 | //\r | |
1440 | if (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE) {\r | |
1441 | StackCorrupted = 1;\r | |
1442 | }\r | |
1443 | \r | |
1444 | VmPtr->FramePtr = (VOID *) ((UINT8 *) (UINTN) VmPtr->Gpr[0] + 8);\r | |
1445 | \r | |
1446 | //\r | |
1447 | // Try to get the debug support for EBC\r | |
1448 | //\r | |
1449 | DEBUG_CODE_BEGIN ();\r | |
1450 | Status = gBS->LocateProtocol (\r | |
1451 | &gEfiEbcSimpleDebuggerProtocolGuid,\r | |
1452 | NULL,\r | |
1453 | (VOID **) &EbcSimpleDebugger\r | |
1454 | );\r | |
1455 | if (EFI_ERROR (Status)) {\r | |
1456 | EbcSimpleDebugger = NULL;\r | |
1457 | }\r | |
1458 | DEBUG_CODE_END ();\r | |
1459 | \r | |
1460 | //\r | |
1461 | // Save the start IP for debug. For example, if we take an exception we\r | |
1462 | // can print out the location of the exception relative to the entry point,\r | |
1463 | // which could then be used in a disassembly listing to find the problem.\r | |
1464 | //\r | |
1465 | VmPtr->EntryPoint = (VOID *) VmPtr->Ip;\r | |
1466 | \r | |
1467 | //\r | |
1468 | // We'll wait for this flag to know when we're done. The RET\r | |
1469 | // instruction sets it if it runs out of stack.\r | |
1470 | //\r | |
1471 | VmPtr->StopFlags = 0;\r | |
1472 | while ((VmPtr->StopFlags & STOPFLAG_APP_DONE) == 0) {\r | |
1473 | //\r | |
1474 | // If we've found a simple debugger protocol, call it\r | |
1475 | //\r | |
1476 | DEBUG_CODE_BEGIN ();\r | |
1477 | if (EbcSimpleDebugger != NULL) {\r | |
1478 | EbcSimpleDebugger->Debugger (EbcSimpleDebugger, VmPtr);\r | |
1479 | }\r | |
1480 | DEBUG_CODE_END ();\r | |
1481 | \r | |
1482 | //\r | |
1483 | // Use the opcode bits to index into the opcode dispatch table. If the\r | |
1484 | // function pointer is null then generate an exception.\r | |
1485 | //\r | |
1486 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction;\r | |
1487 | if (ExecFunc == (UINTN) NULL) {\r | |
1488 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1489 | Status = EFI_UNSUPPORTED;\r | |
1490 | goto Done;\r | |
1491 | }\r | |
1492 | \r | |
1493 | EbcDebuggerHookExecuteStart (VmPtr);\r | |
1494 | \r | |
1495 | //\r | |
1496 | // The EBC VM is a strongly ordered processor, so perform a fence operation before\r | |
1497 | // and after each instruction is executed.\r | |
1498 | //\r | |
1499 | MemoryFence ();\r | |
1500 | \r | |
1501 | mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction (VmPtr);\r | |
1502 | \r | |
1503 | MemoryFence ();\r | |
1504 | \r | |
1505 | EbcDebuggerHookExecuteEnd (VmPtr);\r | |
1506 | \r | |
1507 | //\r | |
1508 | // If the step flag is set, signal an exception and continue. We don't\r | |
1509 | // clear it here. Assuming the debugger is responsible for clearing it.\r | |
1510 | //\r | |
1511 | if (VMFLAG_ISSET (VmPtr, VMFLAGS_STEP)) {\r | |
1512 | EbcDebugSignalException (EXCEPT_EBC_STEP, EXCEPTION_FLAG_NONE, VmPtr);\r | |
1513 | }\r | |
1514 | //\r | |
1515 | // Make sure stack has not been corrupted. Only report it once though.\r | |
1516 | //\r | |
1517 | if ((StackCorrupted == 0) && (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE)) {\r | |
1518 | EbcDebugSignalException (EXCEPT_EBC_STACK_FAULT, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1519 | StackCorrupted = 1;\r | |
1520 | }\r | |
1521 | if ((StackCorrupted == 0) && ((UINT64)VmPtr->Gpr[0] <= (UINT64)(UINTN) VmPtr->StackTop)) {\r | |
1522 | EbcDebugSignalException (EXCEPT_EBC_STACK_FAULT, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1523 | StackCorrupted = 1;\r | |
1524 | }\r | |
1525 | }\r | |
1526 | \r | |
1527 | Done:\r | |
1528 | mVmPtr = NULL;\r | |
1529 | \r | |
1530 | return Status;\r | |
1531 | }\r | |
1532 | \r | |
1533 | \r | |
1534 | /**\r | |
1535 | Execute the MOVxx instructions.\r | |
1536 | \r | |
1537 | Instruction format:\r | |
1538 | \r | |
1539 | MOV[b|w|d|q|n]{w|d} {@}R1 {Index16|32}, {@}R2 {Index16|32}\r | |
1540 | MOVqq {@}R1 {Index64}, {@}R2 {Index64}\r | |
1541 | \r | |
1542 | Copies contents of [R2] -> [R1], zero extending where required.\r | |
1543 | \r | |
1544 | First character indicates the size of the move.\r | |
1545 | Second character indicates the size of the index(s).\r | |
1546 | \r | |
1547 | Invalid to have R1 direct with index.\r | |
1548 | \r | |
1549 | @param VmPtr A pointer to a VM context.\r | |
1550 | \r | |
1551 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
1552 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
1553 | \r | |
1554 | **/\r | |
1555 | EFI_STATUS\r | |
1556 | ExecuteMOVxx (\r | |
1557 | IN VM_CONTEXT *VmPtr\r | |
1558 | )\r | |
1559 | {\r | |
1560 | UINT8 Opcode;\r | |
1561 | UINT8 OpcMasked;\r | |
1562 | UINT8 Operands;\r | |
1563 | UINT8 Size;\r | |
1564 | UINT8 MoveSize;\r | |
1565 | INT16 Index16;\r | |
1566 | INT32 Index32;\r | |
1567 | INT64 Index64Op1;\r | |
1568 | INT64 Index64Op2;\r | |
1569 | UINT64 Data64;\r | |
1570 | UINT64 DataMask;\r | |
1571 | UINTN Source;\r | |
1572 | \r | |
1573 | Opcode = GETOPCODE (VmPtr);\r | |
1574 | OpcMasked = (UINT8) (Opcode & OPCODE_M_OPCODE);\r | |
1575 | \r | |
1576 | //\r | |
1577 | // Get the operands byte so we can get R1 and R2\r | |
1578 | //\r | |
1579 | Operands = GETOPERANDS (VmPtr);\r | |
1580 | \r | |
1581 | //\r | |
1582 | // Assume no indexes\r | |
1583 | //\r | |
1584 | Index64Op1 = 0;\r | |
1585 | Index64Op2 = 0;\r | |
1586 | Data64 = 0;\r | |
1587 | \r | |
1588 | //\r | |
1589 | // Determine if we have an index/immediate data. Base instruction size\r | |
1590 | // is 2 (opcode + operands). Add to this size each index specified.\r | |
1591 | //\r | |
1592 | Size = 2;\r | |
1593 | if ((Opcode & (OPCODE_M_IMMED_OP1 | OPCODE_M_IMMED_OP2)) != 0) {\r | |
1594 | //\r | |
1595 | // Determine size of the index from the opcode. Then get it.\r | |
1596 | //\r | |
1597 | if ((OpcMasked <= OPCODE_MOVQW) || (OpcMasked == OPCODE_MOVNW)) {\r | |
1598 | //\r | |
1599 | // MOVBW, MOVWW, MOVDW, MOVQW, and MOVNW have 16-bit immediate index.\r | |
1600 | // Get one or both index values.\r | |
1601 | //\r | |
1602 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r | |
1603 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
1604 | Index64Op1 = (INT64) Index16;\r | |
1605 | Size += sizeof (UINT16);\r | |
1606 | }\r | |
1607 | \r | |
1608 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r | |
1609 | Index16 = VmReadIndex16 (VmPtr, Size);\r | |
1610 | Index64Op2 = (INT64) Index16;\r | |
1611 | Size += sizeof (UINT16);\r | |
1612 | }\r | |
1613 | } else if ((OpcMasked <= OPCODE_MOVQD) || (OpcMasked == OPCODE_MOVND)) {\r | |
1614 | //\r | |
1615 | // MOVBD, MOVWD, MOVDD, MOVQD, and MOVND have 32-bit immediate index\r | |
1616 | //\r | |
1617 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r | |
1618 | Index32 = VmReadIndex32 (VmPtr, 2);\r | |
1619 | Index64Op1 = (INT64) Index32;\r | |
1620 | Size += sizeof (UINT32);\r | |
1621 | }\r | |
1622 | \r | |
1623 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r | |
1624 | Index32 = VmReadIndex32 (VmPtr, Size);\r | |
1625 | Index64Op2 = (INT64) Index32;\r | |
1626 | Size += sizeof (UINT32);\r | |
1627 | }\r | |
1628 | } else if (OpcMasked == OPCODE_MOVQQ) {\r | |
1629 | //\r | |
1630 | // MOVqq -- only form with a 64-bit index\r | |
1631 | //\r | |
1632 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r | |
1633 | Index64Op1 = VmReadIndex64 (VmPtr, 2);\r | |
1634 | Size += sizeof (UINT64);\r | |
1635 | }\r | |
1636 | \r | |
1637 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r | |
1638 | Index64Op2 = VmReadIndex64 (VmPtr, Size);\r | |
1639 | Size += sizeof (UINT64);\r | |
1640 | }\r | |
1641 | } else {\r | |
1642 | //\r | |
1643 | // Obsolete MOVBQ, MOVWQ, MOVDQ, and MOVNQ have 64-bit immediate index\r | |
1644 | //\r | |
1645 | EbcDebugSignalException (\r | |
1646 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1647 | EXCEPTION_FLAG_FATAL,\r | |
1648 | VmPtr\r | |
1649 | );\r | |
1650 | return EFI_UNSUPPORTED;\r | |
1651 | }\r | |
1652 | }\r | |
1653 | //\r | |
1654 | // Determine the size of the move, and create a mask for it so we can\r | |
1655 | // clear unused bits.\r | |
1656 | //\r | |
1657 | if ((OpcMasked == OPCODE_MOVBW) || (OpcMasked == OPCODE_MOVBD)) {\r | |
1658 | MoveSize = DATA_SIZE_8;\r | |
1659 | DataMask = 0xFF;\r | |
1660 | } else if ((OpcMasked == OPCODE_MOVWW) || (OpcMasked == OPCODE_MOVWD)) {\r | |
1661 | MoveSize = DATA_SIZE_16;\r | |
1662 | DataMask = 0xFFFF;\r | |
1663 | } else if ((OpcMasked == OPCODE_MOVDW) || (OpcMasked == OPCODE_MOVDD)) {\r | |
1664 | MoveSize = DATA_SIZE_32;\r | |
1665 | DataMask = 0xFFFFFFFF;\r | |
1666 | } else if ((OpcMasked == OPCODE_MOVQW) || (OpcMasked == OPCODE_MOVQD) || (OpcMasked == OPCODE_MOVQQ)) {\r | |
1667 | MoveSize = DATA_SIZE_64;\r | |
1668 | DataMask = (UINT64)~0;\r | |
1669 | } else if ((OpcMasked == OPCODE_MOVNW) || (OpcMasked == OPCODE_MOVND)) {\r | |
1670 | MoveSize = DATA_SIZE_N;\r | |
1671 | DataMask = (UINT64)~0 >> (64 - 8 * sizeof (UINTN));\r | |
1672 | } else {\r | |
1673 | //\r | |
1674 | // We were dispatched to this function and we don't recognize the opcode\r | |
1675 | //\r | |
1676 | EbcDebugSignalException (EXCEPT_EBC_UNDEFINED, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1677 | return EFI_UNSUPPORTED;\r | |
1678 | }\r | |
1679 | //\r | |
1680 | // Now get the source address\r | |
1681 | //\r | |
1682 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1683 | //\r | |
1684 | // Indirect form @R2. Compute address of operand2\r | |
1685 | //\r | |
1686 | Source = (UINTN) (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index64Op2);\r | |
1687 | //\r | |
1688 | // Now get the data from the source. Always 0-extend and let the compiler\r | |
1689 | // sign-extend where required.\r | |
1690 | //\r | |
1691 | switch (MoveSize) {\r | |
1692 | case DATA_SIZE_8:\r | |
1693 | Data64 = (UINT64) (UINT8) VmReadMem8 (VmPtr, Source);\r | |
1694 | break;\r | |
1695 | \r | |
1696 | case DATA_SIZE_16:\r | |
1697 | Data64 = (UINT64) (UINT16) VmReadMem16 (VmPtr, Source);\r | |
1698 | break;\r | |
1699 | \r | |
1700 | case DATA_SIZE_32:\r | |
1701 | Data64 = (UINT64) (UINT32) VmReadMem32 (VmPtr, Source);\r | |
1702 | break;\r | |
1703 | \r | |
1704 | case DATA_SIZE_64:\r | |
1705 | Data64 = (UINT64) VmReadMem64 (VmPtr, Source);\r | |
1706 | break;\r | |
1707 | \r | |
1708 | case DATA_SIZE_N:\r | |
1709 | Data64 = (UINT64) (UINTN) VmReadMemN (VmPtr, Source);\r | |
1710 | break;\r | |
1711 | \r | |
1712 | default:\r | |
1713 | //\r | |
1714 | // not reached\r | |
1715 | //\r | |
1716 | break;\r | |
1717 | }\r | |
1718 | } else {\r | |
1719 | //\r | |
1720 | // Not indirect source: MOVxx {@}Rx, Ry [Index]\r | |
1721 | //\r | |
1722 | Data64 = (UINT64) (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index64Op2);\r | |
1723 | //\r | |
1724 | // Did Operand2 have an index? If so, treat as two signed values since\r | |
1725 | // indexes are signed values.\r | |
1726 | //\r | |
1727 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r | |
1728 | //\r | |
1729 | // NOTE: need to find a way to fix this, most likely by changing the VM\r | |
1730 | // implementation to remove the stack gap. To do that, we'd need to\r | |
1731 | // allocate stack space for the VM and actually set the system\r | |
1732 | // stack pointer to the allocated buffer when the VM starts.\r | |
1733 | //\r | |
1734 | // Special case -- if someone took the address of a function parameter\r | |
1735 | // then we need to make sure it's not in the stack gap. We can identify\r | |
1736 | // this situation if (Operand2 register == 0) && (Operand2 is direct)\r | |
1737 | // && (Index applies to Operand2) && (Index > 0) && (Operand1 register != 0)\r | |
1738 | // Situations that to be aware of:\r | |
1739 | // * stack adjustments at beginning and end of functions R0 = R0 += stacksize\r | |
1740 | //\r | |
1741 | if ((OPERAND2_REGNUM (Operands) == 0) &&\r | |
1742 | (!OPERAND2_INDIRECT (Operands)) &&\r | |
1743 | (Index64Op2 > 0) &&\r | |
1744 | (OPERAND1_REGNUM (Operands) == 0) &&\r | |
1745 | (OPERAND1_INDIRECT (Operands))\r | |
1746 | ) {\r | |
1747 | Data64 = (UINT64) ConvertStackAddr (VmPtr, (UINTN) (INT64) Data64);\r | |
1748 | }\r | |
1749 | }\r | |
1750 | }\r | |
1751 | //\r | |
1752 | // Now write it back\r | |
1753 | //\r | |
1754 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1755 | //\r | |
1756 | // Reuse the Source variable to now be dest.\r | |
1757 | //\r | |
1758 | Source = (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index64Op1);\r | |
1759 | //\r | |
1760 | // Do the write based on the size\r | |
1761 | //\r | |
1762 | switch (MoveSize) {\r | |
1763 | case DATA_SIZE_8:\r | |
1764 | VmWriteMem8 (VmPtr, Source, (UINT8) Data64);\r | |
1765 | break;\r | |
1766 | \r | |
1767 | case DATA_SIZE_16:\r | |
1768 | VmWriteMem16 (VmPtr, Source, (UINT16) Data64);\r | |
1769 | break;\r | |
1770 | \r | |
1771 | case DATA_SIZE_32:\r | |
1772 | VmWriteMem32 (VmPtr, Source, (UINT32) Data64);\r | |
1773 | break;\r | |
1774 | \r | |
1775 | case DATA_SIZE_64:\r | |
1776 | VmWriteMem64 (VmPtr, Source, Data64);\r | |
1777 | break;\r | |
1778 | \r | |
1779 | case DATA_SIZE_N:\r | |
1780 | VmWriteMemN (VmPtr, Source, (UINTN) Data64);\r | |
1781 | break;\r | |
1782 | \r | |
1783 | default:\r | |
1784 | //\r | |
1785 | // not reached\r | |
1786 | //\r | |
1787 | break;\r | |
1788 | }\r | |
1789 | } else {\r | |
1790 | //\r | |
1791 | // Operand1 direct.\r | |
1792 | // Make sure we didn't have an index on operand1.\r | |
1793 | //\r | |
1794 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r | |
1795 | EbcDebugSignalException (\r | |
1796 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1797 | EXCEPTION_FLAG_FATAL,\r | |
1798 | VmPtr\r | |
1799 | );\r | |
1800 | return EFI_UNSUPPORTED;\r | |
1801 | }\r | |
1802 | //\r | |
1803 | // Direct storage in register. Clear unused bits and store back to\r | |
1804 | // register.\r | |
1805 | //\r | |
1806 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Data64 & DataMask;\r | |
1807 | }\r | |
1808 | //\r | |
1809 | // Advance the instruction pointer\r | |
1810 | //\r | |
1811 | VmPtr->Ip += Size;\r | |
1812 | return EFI_SUCCESS;\r | |
1813 | }\r | |
1814 | \r | |
1815 | \r | |
1816 | /**\r | |
1817 | Execute the EBC BREAK instruction.\r | |
1818 | \r | |
1819 | @param VmPtr A pointer to a VM context.\r | |
1820 | \r | |
1821 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
1822 | \r | |
1823 | **/\r | |
1824 | EFI_STATUS\r | |
1825 | ExecuteBREAK (\r | |
1826 | IN VM_CONTEXT *VmPtr\r | |
1827 | )\r | |
1828 | {\r | |
1829 | EFI_STATUS Status;\r | |
1830 | UINT8 Operands;\r | |
1831 | VOID *EbcEntryPoint;\r | |
1832 | VOID *Thunk;\r | |
1833 | UINT64 U64EbcEntryPoint;\r | |
1834 | INT32 Offset;\r | |
1835 | \r | |
1836 | Thunk = NULL;\r | |
1837 | Operands = GETOPERANDS (VmPtr);\r | |
1838 | switch (Operands) {\r | |
1839 | //\r | |
1840 | // Runaway program break. Generate an exception and terminate\r | |
1841 | //\r | |
1842 | case 0:\r | |
1843 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1844 | break;\r | |
1845 | \r | |
1846 | //\r | |
1847 | // Get VM version -- return VM revision number in R7\r | |
1848 | //\r | |
1849 | case 1:\r | |
1850 | //\r | |
1851 | // Bits:\r | |
1852 | // 63-17 = 0\r | |
1853 | // 16-8 = Major version\r | |
1854 | // 7-0 = Minor version\r | |
1855 | //\r | |
1856 | VmPtr->Gpr[7] = GetVmVersion ();\r | |
1857 | break;\r | |
1858 | \r | |
1859 | //\r | |
1860 | // Debugger breakpoint\r | |
1861 | //\r | |
1862 | case 3:\r | |
1863 | VmPtr->StopFlags |= STOPFLAG_BREAKPOINT;\r | |
1864 | //\r | |
1865 | // See if someone has registered a handler\r | |
1866 | //\r | |
1867 | EbcDebugSignalException (\r | |
1868 | EXCEPT_EBC_BREAKPOINT,\r | |
1869 | EXCEPTION_FLAG_NONE,\r | |
1870 | VmPtr\r | |
1871 | );\r | |
1872 | break;\r | |
1873 | \r | |
1874 | //\r | |
1875 | // System call, which there are none, so NOP it.\r | |
1876 | //\r | |
1877 | case 4:\r | |
1878 | break;\r | |
1879 | \r | |
1880 | //\r | |
1881 | // Create a thunk for EBC code. R7 points to a 32-bit (in a 64-bit slot)\r | |
1882 | // "offset from self" pointer to the EBC entry point.\r | |
1883 | // After we're done, *(UINT64 *)R7 will be the address of the new thunk.\r | |
1884 | //\r | |
1885 | case 5:\r | |
1886 | Offset = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->Gpr[7]);\r | |
1887 | U64EbcEntryPoint = (UINT64) (VmPtr->Gpr[7] + Offset + 4);\r | |
1888 | EbcEntryPoint = (VOID *) (UINTN) U64EbcEntryPoint;\r | |
1889 | \r | |
1890 | //\r | |
1891 | // Now create a new thunk\r | |
1892 | //\r | |
1893 | Status = EbcCreateThunks (VmPtr->ImageHandle, EbcEntryPoint, &Thunk, 0);\r | |
1894 | if (EFI_ERROR (Status)) {\r | |
1895 | return Status;\r | |
1896 | }\r | |
1897 | \r | |
1898 | //\r | |
1899 | // Finally replace the EBC entry point memory with the thunk address\r | |
1900 | //\r | |
1901 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[7], (UINT64) (UINTN) Thunk);\r | |
1902 | break;\r | |
1903 | \r | |
1904 | //\r | |
1905 | // Compiler setting version per value in R7\r | |
1906 | //\r | |
1907 | case 6:\r | |
1908 | VmPtr->CompilerVersion = (UINT32) VmPtr->Gpr[7];\r | |
1909 | //\r | |
1910 | // Check compiler version against VM version?\r | |
1911 | //\r | |
1912 | break;\r | |
1913 | \r | |
1914 | //\r | |
1915 | // Unhandled break code. Signal exception.\r | |
1916 | //\r | |
1917 | default:\r | |
1918 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1919 | break;\r | |
1920 | }\r | |
1921 | //\r | |
1922 | // Advance IP\r | |
1923 | //\r | |
1924 | VmPtr->Ip += 2;\r | |
1925 | return EFI_SUCCESS;\r | |
1926 | }\r | |
1927 | \r | |
1928 | \r | |
1929 | /**\r | |
1930 | Execute the JMP instruction.\r | |
1931 | \r | |
1932 | Instruction syntax:\r | |
1933 | JMP64{cs|cc} Immed64\r | |
1934 | JMP32{cs|cc} {@}R1 {Immed32|Index32}\r | |
1935 | \r | |
1936 | Encoding:\r | |
1937 | b0.7 - immediate data present\r | |
1938 | b0.6 - 1 = 64 bit immediate data\r | |
1939 | 0 = 32 bit immediate data\r | |
1940 | b1.7 - 1 = conditional\r | |
1941 | b1.6 1 = CS (condition set)\r | |
1942 | 0 = CC (condition clear)\r | |
1943 | b1.4 1 = relative address\r | |
1944 | 0 = absolute address\r | |
1945 | b1.3 1 = operand1 indirect\r | |
1946 | b1.2-0 operand 1\r | |
1947 | \r | |
1948 | @param VmPtr A pointer to a VM context.\r | |
1949 | \r | |
1950 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
1951 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
1952 | \r | |
1953 | **/\r | |
1954 | EFI_STATUS\r | |
1955 | ExecuteJMP (\r | |
1956 | IN VM_CONTEXT *VmPtr\r | |
1957 | )\r | |
1958 | {\r | |
1959 | UINT8 Opcode;\r | |
1960 | UINT8 CompareSet;\r | |
1961 | UINT8 ConditionFlag;\r | |
1962 | UINT8 Size;\r | |
1963 | UINT8 Operand;\r | |
1964 | UINT64 Data64;\r | |
1965 | INT32 Index32;\r | |
1966 | UINTN Addr;\r | |
1967 | \r | |
1968 | Operand = GETOPERANDS (VmPtr);\r | |
1969 | Opcode = GETOPCODE (VmPtr);\r | |
1970 | \r | |
1971 | //\r | |
1972 | // Get instruction length from the opcode. The upper two bits are used here\r | |
1973 | // to index into the length array.\r | |
1974 | //\r | |
1975 | Size = mJMPLen[(Opcode >> 6) & 0x03];\r | |
1976 | \r | |
1977 | //\r | |
1978 | // Decode instruction conditions\r | |
1979 | // If we haven't met the condition, then simply advance the IP and return.\r | |
1980 | //\r | |
1981 | CompareSet = (UINT8) (((Operand & JMP_M_CS) != 0) ? 1 : 0);\r | |
1982 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r | |
1983 | if ((Operand & CONDITION_M_CONDITIONAL) != 0) {\r | |
1984 | if (CompareSet != ConditionFlag) {\r | |
1985 | EbcDebuggerHookJMPStart (VmPtr);\r | |
1986 | VmPtr->Ip += Size;\r | |
1987 | EbcDebuggerHookJMPEnd (VmPtr);\r | |
1988 | return EFI_SUCCESS;\r | |
1989 | }\r | |
1990 | }\r | |
1991 | //\r | |
1992 | // Check for 64-bit form and do it right away since it's the most\r | |
1993 | // straight-forward form.\r | |
1994 | //\r | |
1995 | if ((Opcode & OPCODE_M_IMMDATA64) != 0) {\r | |
1996 | //\r | |
1997 | // Double check for immediate-data, which is required. If not there,\r | |
1998 | // then signal an exception\r | |
1999 | //\r | |
2000 | if ((Opcode & OPCODE_M_IMMDATA) == 0) {\r | |
2001 | EbcDebugSignalException (\r | |
2002 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2003 | EXCEPTION_FLAG_ERROR,\r | |
2004 | VmPtr\r | |
2005 | );\r | |
2006 | return EFI_UNSUPPORTED;\r | |
2007 | }\r | |
2008 | //\r | |
2009 | // 64-bit immediate data is full address. Read the immediate data,\r | |
2010 | // check for alignment, and jump absolute.\r | |
2011 | //\r | |
2012 | Data64 = (UINT64) VmReadImmed64 (VmPtr, 2);\r | |
2013 | if (!IS_ALIGNED ((UINTN) Data64, sizeof (UINT16))) {\r | |
2014 | EbcDebugSignalException (\r | |
2015 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2016 | EXCEPTION_FLAG_FATAL,\r | |
2017 | VmPtr\r | |
2018 | );\r | |
2019 | \r | |
2020 | return EFI_UNSUPPORTED;\r | |
2021 | }\r | |
2022 | \r | |
2023 | //\r | |
2024 | // Take jump -- relative or absolute\r | |
2025 | //\r | |
2026 | EbcDebuggerHookJMPStart (VmPtr);\r | |
2027 | if ((Operand & JMP_M_RELATIVE) != 0) {\r | |
2028 | VmPtr->Ip += (UINTN) Data64 + Size;\r | |
2029 | } else {\r | |
2030 | VmPtr->Ip = (VMIP) (UINTN) Data64;\r | |
2031 | }\r | |
2032 | EbcDebuggerHookJMPEnd (VmPtr);\r | |
2033 | \r | |
2034 | return EFI_SUCCESS;\r | |
2035 | }\r | |
2036 | //\r | |
2037 | // 32-bit forms:\r | |
2038 | // Get the index if there is one. May be either an index, or an immediate\r | |
2039 | // offset depending on indirect operand.\r | |
2040 | // JMP32 @R1 Index32 -- immediate data is an index\r | |
2041 | // JMP32 R1 Immed32 -- immedate data is an offset\r | |
2042 | //\r | |
2043 | if ((Opcode & OPCODE_M_IMMDATA) != 0) {\r | |
2044 | if (OPERAND1_INDIRECT (Operand)) {\r | |
2045 | Index32 = VmReadIndex32 (VmPtr, 2);\r | |
2046 | } else {\r | |
2047 | Index32 = VmReadImmed32 (VmPtr, 2);\r | |
2048 | }\r | |
2049 | } else {\r | |
2050 | Index32 = 0;\r | |
2051 | }\r | |
2052 | //\r | |
2053 | // Get the register data. If R == 0, then special case where it's ignored.\r | |
2054 | //\r | |
2055 | if (OPERAND1_REGNUM (Operand) == 0) {\r | |
2056 | Data64 = 0;\r | |
2057 | } else {\r | |
2058 | Data64 = (UINT64) OPERAND1_REGDATA (VmPtr, Operand);\r | |
2059 | }\r | |
2060 | //\r | |
2061 | // Decode the forms\r | |
2062 | //\r | |
2063 | if (OPERAND1_INDIRECT (Operand)) {\r | |
2064 | //\r | |
2065 | // Form: JMP32 @Rx {Index32}\r | |
2066 | //\r | |
2067 | Addr = VmReadMemN (VmPtr, (UINTN) Data64 + Index32);\r | |
2068 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
2069 | EbcDebugSignalException (\r | |
2070 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2071 | EXCEPTION_FLAG_FATAL,\r | |
2072 | VmPtr\r | |
2073 | );\r | |
2074 | \r | |
2075 | return EFI_UNSUPPORTED;\r | |
2076 | }\r | |
2077 | \r | |
2078 | EbcDebuggerHookJMPStart (VmPtr);\r | |
2079 | if ((Operand & JMP_M_RELATIVE) != 0) {\r | |
2080 | VmPtr->Ip += (UINTN) Addr + Size;\r | |
2081 | } else {\r | |
2082 | VmPtr->Ip = (VMIP) Addr;\r | |
2083 | }\r | |
2084 | EbcDebuggerHookJMPEnd (VmPtr);\r | |
2085 | \r | |
2086 | } else {\r | |
2087 | //\r | |
2088 | // Form: JMP32 Rx {Immed32}\r | |
2089 | //\r | |
2090 | Addr = (UINTN) (Data64 + Index32);\r | |
2091 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
2092 | EbcDebugSignalException (\r | |
2093 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2094 | EXCEPTION_FLAG_FATAL,\r | |
2095 | VmPtr\r | |
2096 | );\r | |
2097 | \r | |
2098 | return EFI_UNSUPPORTED;\r | |
2099 | }\r | |
2100 | \r | |
2101 | EbcDebuggerHookJMPStart (VmPtr);\r | |
2102 | if ((Operand & JMP_M_RELATIVE) != 0) {\r | |
2103 | VmPtr->Ip += (UINTN) Addr + Size;\r | |
2104 | } else {\r | |
2105 | VmPtr->Ip = (VMIP) Addr;\r | |
2106 | }\r | |
2107 | EbcDebuggerHookJMPEnd (VmPtr);\r | |
2108 | \r | |
2109 | }\r | |
2110 | \r | |
2111 | return EFI_SUCCESS;\r | |
2112 | }\r | |
2113 | \r | |
2114 | \r | |
2115 | /**\r | |
2116 | Execute the EBC JMP8 instruction.\r | |
2117 | \r | |
2118 | Instruction syntax:\r | |
2119 | JMP8{cs|cc} Offset/2\r | |
2120 | \r | |
2121 | @param VmPtr A pointer to a VM context.\r | |
2122 | \r | |
2123 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2124 | \r | |
2125 | **/\r | |
2126 | EFI_STATUS\r | |
2127 | ExecuteJMP8 (\r | |
2128 | IN VM_CONTEXT *VmPtr\r | |
2129 | )\r | |
2130 | {\r | |
2131 | UINT8 Opcode;\r | |
2132 | UINT8 ConditionFlag;\r | |
2133 | UINT8 CompareSet;\r | |
2134 | INT8 Offset;\r | |
2135 | \r | |
2136 | //\r | |
2137 | // Decode instruction.\r | |
2138 | //\r | |
2139 | Opcode = GETOPCODE (VmPtr);\r | |
2140 | CompareSet = (UINT8) (((Opcode & JMP_M_CS) != 0) ? 1 : 0);\r | |
2141 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r | |
2142 | \r | |
2143 | //\r | |
2144 | // If we haven't met the condition, then simply advance the IP and return\r | |
2145 | //\r | |
2146 | if ((Opcode & CONDITION_M_CONDITIONAL) != 0) {\r | |
2147 | if (CompareSet != ConditionFlag) {\r | |
2148 | EbcDebuggerHookJMP8Start (VmPtr);\r | |
2149 | VmPtr->Ip += 2;\r | |
2150 | EbcDebuggerHookJMP8End (VmPtr);\r | |
2151 | return EFI_SUCCESS;\r | |
2152 | }\r | |
2153 | }\r | |
2154 | //\r | |
2155 | // Get the offset from the instruction stream. It's relative to the\r | |
2156 | // following instruction, and divided by 2.\r | |
2157 | //\r | |
2158 | Offset = VmReadImmed8 (VmPtr, 1);\r | |
2159 | //\r | |
2160 | // Want to check for offset == -2 and then raise an exception?\r | |
2161 | //\r | |
2162 | EbcDebuggerHookJMP8Start (VmPtr);\r | |
2163 | VmPtr->Ip += (Offset * 2) + 2;\r | |
2164 | EbcDebuggerHookJMP8End (VmPtr);\r | |
2165 | return EFI_SUCCESS;\r | |
2166 | }\r | |
2167 | \r | |
2168 | \r | |
2169 | /**\r | |
2170 | Execute the EBC MOVI.\r | |
2171 | \r | |
2172 | Instruction syntax:\r | |
2173 | \r | |
2174 | MOVI[b|w|d|q][w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
2175 | \r | |
2176 | First variable character specifies the move size\r | |
2177 | Second variable character specifies size of the immediate data\r | |
2178 | \r | |
2179 | Sign-extend the immediate data to the size of the operation, and zero-extend\r | |
2180 | if storing to a register.\r | |
2181 | \r | |
2182 | Operand1 direct with index/immed is invalid.\r | |
2183 | \r | |
2184 | @param VmPtr A pointer to a VM context.\r | |
2185 | \r | |
2186 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
2187 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2188 | \r | |
2189 | **/\r | |
2190 | EFI_STATUS\r | |
2191 | ExecuteMOVI (\r | |
2192 | IN VM_CONTEXT *VmPtr\r | |
2193 | )\r | |
2194 | {\r | |
2195 | UINT8 Opcode;\r | |
2196 | UINT8 Operands;\r | |
2197 | UINT8 Size;\r | |
2198 | INT16 Index16;\r | |
2199 | INT64 ImmData64;\r | |
2200 | UINT64 Op1;\r | |
2201 | UINT64 Mask64;\r | |
2202 | \r | |
2203 | //\r | |
2204 | // Get the opcode and operands byte so we can get R1 and R2\r | |
2205 | //\r | |
2206 | Opcode = GETOPCODE (VmPtr);\r | |
2207 | Operands = GETOPERANDS (VmPtr);\r | |
2208 | \r | |
2209 | //\r | |
2210 | // Get the index (16-bit) if present\r | |
2211 | //\r | |
2212 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r | |
2213 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2214 | Size = 4;\r | |
2215 | } else {\r | |
2216 | Index16 = 0;\r | |
2217 | Size = 2;\r | |
2218 | }\r | |
2219 | //\r | |
2220 | // Extract the immediate data. Sign-extend always.\r | |
2221 | //\r | |
2222 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
2223 | ImmData64 = (INT64) (INT16) VmReadImmed16 (VmPtr, Size);\r | |
2224 | Size += 2;\r | |
2225 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
2226 | ImmData64 = (INT64) (INT32) VmReadImmed32 (VmPtr, Size);\r | |
2227 | Size += 4;\r | |
2228 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
2229 | ImmData64 = (INT64) VmReadImmed64 (VmPtr, Size);\r | |
2230 | Size += 8;\r | |
2231 | } else {\r | |
2232 | //\r | |
2233 | // Invalid encoding\r | |
2234 | //\r | |
2235 | EbcDebugSignalException (\r | |
2236 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2237 | EXCEPTION_FLAG_FATAL,\r | |
2238 | VmPtr\r | |
2239 | );\r | |
2240 | return EFI_UNSUPPORTED;\r | |
2241 | }\r | |
2242 | //\r | |
2243 | // Now write back the result\r | |
2244 | //\r | |
2245 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
2246 | //\r | |
2247 | // Operand1 direct. Make sure it didn't have an index.\r | |
2248 | //\r | |
2249 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r | |
2250 | EbcDebugSignalException (\r | |
2251 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2252 | EXCEPTION_FLAG_FATAL,\r | |
2253 | VmPtr\r | |
2254 | );\r | |
2255 | return EFI_UNSUPPORTED;\r | |
2256 | }\r | |
2257 | //\r | |
2258 | // Writing directly to a register. Clear unused bits.\r | |
2259 | //\r | |
2260 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
2261 | Mask64 = 0x000000FF;\r | |
2262 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
2263 | Mask64 = 0x0000FFFF;\r | |
2264 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
2265 | Mask64 = 0x00000000FFFFFFFF;\r | |
2266 | } else {\r | |
2267 | Mask64 = (UINT64)~0;\r | |
2268 | }\r | |
2269 | \r | |
2270 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = ImmData64 & Mask64;\r | |
2271 | } else {\r | |
2272 | //\r | |
2273 | // Get the address then write back based on size of the move\r | |
2274 | //\r | |
2275 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2276 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
2277 | VmWriteMem8 (VmPtr, (UINTN) Op1, (UINT8) ImmData64);\r | |
2278 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
2279 | VmWriteMem16 (VmPtr, (UINTN) Op1, (UINT16) ImmData64);\r | |
2280 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
2281 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) ImmData64);\r | |
2282 | } else {\r | |
2283 | VmWriteMem64 (VmPtr, (UINTN) Op1, (UINT64) ImmData64);\r | |
2284 | }\r | |
2285 | }\r | |
2286 | //\r | |
2287 | // Advance the instruction pointer\r | |
2288 | //\r | |
2289 | VmPtr->Ip += Size;\r | |
2290 | return EFI_SUCCESS;\r | |
2291 | }\r | |
2292 | \r | |
2293 | \r | |
2294 | /**\r | |
2295 | Execute the EBC MOV immediate natural. This instruction moves an immediate\r | |
2296 | index value into a register or memory location.\r | |
2297 | \r | |
2298 | Instruction syntax:\r | |
2299 | \r | |
2300 | MOVIn[w|d|q] {@}R1 {Index16}, Index16|32|64\r | |
2301 | \r | |
2302 | @param VmPtr A pointer to a VM context.\r | |
2303 | \r | |
2304 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
2305 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2306 | \r | |
2307 | **/\r | |
2308 | EFI_STATUS\r | |
2309 | ExecuteMOVIn (\r | |
2310 | IN VM_CONTEXT *VmPtr\r | |
2311 | )\r | |
2312 | {\r | |
2313 | UINT8 Opcode;\r | |
2314 | UINT8 Operands;\r | |
2315 | UINT8 Size;\r | |
2316 | INT16 Index16;\r | |
2317 | INT16 ImmedIndex16;\r | |
2318 | INT32 ImmedIndex32;\r | |
2319 | INT64 ImmedIndex64;\r | |
2320 | UINT64 Op1;\r | |
2321 | \r | |
2322 | //\r | |
2323 | // Get the opcode and operands byte so we can get R1 and R2\r | |
2324 | //\r | |
2325 | Opcode = GETOPCODE (VmPtr);\r | |
2326 | Operands = GETOPERANDS (VmPtr);\r | |
2327 | \r | |
2328 | //\r | |
2329 | // Get the operand1 index (16-bit) if present\r | |
2330 | //\r | |
2331 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r | |
2332 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2333 | Size = 4;\r | |
2334 | } else {\r | |
2335 | Index16 = 0;\r | |
2336 | Size = 2;\r | |
2337 | }\r | |
2338 | //\r | |
2339 | // Extract the immediate data and convert to a 64-bit index.\r | |
2340 | //\r | |
2341 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
2342 | ImmedIndex16 = VmReadIndex16 (VmPtr, Size);\r | |
2343 | ImmedIndex64 = (INT64) ImmedIndex16;\r | |
2344 | Size += 2;\r | |
2345 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
2346 | ImmedIndex32 = VmReadIndex32 (VmPtr, Size);\r | |
2347 | ImmedIndex64 = (INT64) ImmedIndex32;\r | |
2348 | Size += 4;\r | |
2349 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
2350 | ImmedIndex64 = VmReadIndex64 (VmPtr, Size);\r | |
2351 | Size += 8;\r | |
2352 | } else {\r | |
2353 | //\r | |
2354 | // Invalid encoding\r | |
2355 | //\r | |
2356 | EbcDebugSignalException (\r | |
2357 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2358 | EXCEPTION_FLAG_FATAL,\r | |
2359 | VmPtr\r | |
2360 | );\r | |
2361 | return EFI_UNSUPPORTED;\r | |
2362 | }\r | |
2363 | //\r | |
2364 | // Now write back the result\r | |
2365 | //\r | |
2366 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
2367 | //\r | |
2368 | // Check for MOVIn R1 Index16, Immed (not indirect, with index), which\r | |
2369 | // is illegal\r | |
2370 | //\r | |
2371 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r | |
2372 | EbcDebugSignalException (\r | |
2373 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2374 | EXCEPTION_FLAG_FATAL,\r | |
2375 | VmPtr\r | |
2376 | );\r | |
2377 | return EFI_UNSUPPORTED;\r | |
2378 | }\r | |
2379 | \r | |
2380 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = ImmedIndex64;\r | |
2381 | } else {\r | |
2382 | //\r | |
2383 | // Get the address\r | |
2384 | //\r | |
2385 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2386 | VmWriteMemN (VmPtr, (UINTN) Op1, (UINTN)(INTN) ImmedIndex64);\r | |
2387 | }\r | |
2388 | //\r | |
2389 | // Advance the instruction pointer\r | |
2390 | //\r | |
2391 | VmPtr->Ip += Size;\r | |
2392 | return EFI_SUCCESS;\r | |
2393 | }\r | |
2394 | \r | |
2395 | \r | |
2396 | /**\r | |
2397 | Execute the EBC MOVREL instruction.\r | |
2398 | Dest <- Ip + ImmData\r | |
2399 | \r | |
2400 | Instruction syntax:\r | |
2401 | \r | |
2402 | MOVREL[w|d|q] {@}R1 {Index16}, ImmData16|32|64\r | |
2403 | \r | |
2404 | @param VmPtr A pointer to a VM context.\r | |
2405 | \r | |
2406 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
2407 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2408 | \r | |
2409 | **/\r | |
2410 | EFI_STATUS\r | |
2411 | ExecuteMOVREL (\r | |
2412 | IN VM_CONTEXT *VmPtr\r | |
2413 | )\r | |
2414 | {\r | |
2415 | UINT8 Opcode;\r | |
2416 | UINT8 Operands;\r | |
2417 | UINT8 Size;\r | |
2418 | INT16 Index16;\r | |
2419 | INT64 ImmData64;\r | |
2420 | UINT64 Op1;\r | |
2421 | UINT64 Op2;\r | |
2422 | \r | |
2423 | //\r | |
2424 | // Get the opcode and operands byte so we can get R1 and R2\r | |
2425 | //\r | |
2426 | Opcode = GETOPCODE (VmPtr);\r | |
2427 | Operands = GETOPERANDS (VmPtr);\r | |
2428 | \r | |
2429 | //\r | |
2430 | // Get the Operand 1 index (16-bit) if present\r | |
2431 | //\r | |
2432 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r | |
2433 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2434 | Size = 4;\r | |
2435 | } else {\r | |
2436 | Index16 = 0;\r | |
2437 | Size = 2;\r | |
2438 | }\r | |
2439 | //\r | |
2440 | // Get the immediate data.\r | |
2441 | //\r | |
2442 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
2443 | ImmData64 = (INT64) VmReadImmed16 (VmPtr, Size);\r | |
2444 | Size += 2;\r | |
2445 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
2446 | ImmData64 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
2447 | Size += 4;\r | |
2448 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
2449 | ImmData64 = VmReadImmed64 (VmPtr, Size);\r | |
2450 | Size += 8;\r | |
2451 | } else {\r | |
2452 | //\r | |
2453 | // Invalid encoding\r | |
2454 | //\r | |
2455 | EbcDebugSignalException (\r | |
2456 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2457 | EXCEPTION_FLAG_FATAL,\r | |
2458 | VmPtr\r | |
2459 | );\r | |
2460 | return EFI_UNSUPPORTED;\r | |
2461 | }\r | |
2462 | //\r | |
2463 | // Compute the value and write back the result\r | |
2464 | //\r | |
2465 | Op2 = (UINT64) ((INT64) ((UINT64) (UINTN) VmPtr->Ip) + (INT64) ImmData64 + Size);\r | |
2466 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
2467 | //\r | |
2468 | // Check for illegal combination of operand1 direct with immediate data\r | |
2469 | //\r | |
2470 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r | |
2471 | EbcDebugSignalException (\r | |
2472 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2473 | EXCEPTION_FLAG_FATAL,\r | |
2474 | VmPtr\r | |
2475 | );\r | |
2476 | return EFI_UNSUPPORTED;\r | |
2477 | }\r | |
2478 | \r | |
2479 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (VM_REGISTER) Op2;\r | |
2480 | } else {\r | |
2481 | //\r | |
2482 | // Get the address = [Rx] + Index16\r | |
2483 | // Write back the result. Always a natural size write, since\r | |
2484 | // we're talking addresses here.\r | |
2485 | //\r | |
2486 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2487 | VmWriteMemN (VmPtr, (UINTN) Op1, (UINTN) Op2);\r | |
2488 | }\r | |
2489 | //\r | |
2490 | // Advance the instruction pointer\r | |
2491 | //\r | |
2492 | VmPtr->Ip += Size;\r | |
2493 | return EFI_SUCCESS;\r | |
2494 | }\r | |
2495 | \r | |
2496 | \r | |
2497 | /**\r | |
2498 | Execute the EBC MOVsnw instruction. This instruction loads a signed\r | |
2499 | natural value from memory or register to another memory or register. On\r | |
2500 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
2501 | is a register.\r | |
2502 | \r | |
2503 | Instruction syntax:\r | |
2504 | \r | |
2505 | MOVsnw {@}R1 {Index16}, {@}R2 {Index16|Immed16}\r | |
2506 | \r | |
2507 | 0:7 1=>operand1 index present\r | |
2508 | 0:6 1=>operand2 index present\r | |
2509 | \r | |
2510 | @param VmPtr A pointer to a VM context.\r | |
2511 | \r | |
2512 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
2513 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2514 | \r | |
2515 | **/\r | |
2516 | EFI_STATUS\r | |
2517 | ExecuteMOVsnw (\r | |
2518 | IN VM_CONTEXT *VmPtr\r | |
2519 | )\r | |
2520 | {\r | |
2521 | UINT8 Opcode;\r | |
2522 | UINT8 Operands;\r | |
2523 | UINT8 Size;\r | |
2524 | INT16 Op1Index;\r | |
2525 | INT16 Op2Index;\r | |
2526 | UINT64 Op2;\r | |
2527 | \r | |
2528 | //\r | |
2529 | // Get the opcode and operand bytes\r | |
2530 | //\r | |
2531 | Opcode = GETOPCODE (VmPtr);\r | |
2532 | Operands = GETOPERANDS (VmPtr);\r | |
2533 | \r | |
2534 | Op1Index = Op2Index = 0;\r | |
2535 | \r | |
2536 | //\r | |
2537 | // Get the indexes if present.\r | |
2538 | //\r | |
2539 | Size = 2;\r | |
2540 | if ((Opcode & OPCODE_M_IMMED_OP1) !=0) {\r | |
2541 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2542 | Op1Index = VmReadIndex16 (VmPtr, 2);\r | |
2543 | } else {\r | |
2544 | //\r | |
2545 | // Illegal form operand1 direct with index: MOVsnw R1 Index16, {@}R2\r | |
2546 | //\r | |
2547 | EbcDebugSignalException (\r | |
2548 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2549 | EXCEPTION_FLAG_FATAL,\r | |
2550 | VmPtr\r | |
2551 | );\r | |
2552 | return EFI_UNSUPPORTED;\r | |
2553 | }\r | |
2554 | \r | |
2555 | Size += sizeof (UINT16);\r | |
2556 | }\r | |
2557 | \r | |
2558 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r | |
2559 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2560 | Op2Index = VmReadIndex16 (VmPtr, Size);\r | |
2561 | } else {\r | |
2562 | Op2Index = VmReadImmed16 (VmPtr, Size);\r | |
2563 | }\r | |
2564 | \r | |
2565 | Size += sizeof (UINT16);\r | |
2566 | }\r | |
2567 | //\r | |
2568 | // Get the data from the source.\r | |
2569 | //\r | |
2570 | Op2 = (UINT64)(INT64)(INTN)(VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Op2Index);\r | |
2571 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2572 | Op2 = (UINT64)(INT64)(INTN)VmReadMemN (VmPtr, (UINTN) Op2);\r | |
2573 | }\r | |
2574 | //\r | |
2575 | // Now write back the result.\r | |
2576 | //\r | |
2577 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
2578 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Op2;\r | |
2579 | } else {\r | |
2580 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r | |
2581 | }\r | |
2582 | //\r | |
2583 | // Advance the instruction pointer\r | |
2584 | //\r | |
2585 | VmPtr->Ip += Size;\r | |
2586 | return EFI_SUCCESS;\r | |
2587 | }\r | |
2588 | \r | |
2589 | \r | |
2590 | /**\r | |
2591 | Execute the EBC MOVsnw instruction. This instruction loads a signed\r | |
2592 | natural value from memory or register to another memory or register. On\r | |
2593 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
2594 | is a register.\r | |
2595 | \r | |
2596 | Instruction syntax:\r | |
2597 | \r | |
2598 | MOVsnd {@}R1 {Indx32}, {@}R2 {Index32|Immed32}\r | |
2599 | \r | |
2600 | 0:7 1=>operand1 index present\r | |
2601 | 0:6 1=>operand2 index present\r | |
2602 | \r | |
2603 | @param VmPtr A pointer to a VM context.\r | |
2604 | \r | |
2605 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
2606 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2607 | \r | |
2608 | **/\r | |
2609 | EFI_STATUS\r | |
2610 | ExecuteMOVsnd (\r | |
2611 | IN VM_CONTEXT *VmPtr\r | |
2612 | )\r | |
2613 | {\r | |
2614 | UINT8 Opcode;\r | |
2615 | UINT8 Operands;\r | |
2616 | UINT8 Size;\r | |
2617 | INT32 Op1Index;\r | |
2618 | INT32 Op2Index;\r | |
2619 | UINT64 Op2;\r | |
2620 | \r | |
2621 | //\r | |
2622 | // Get the opcode and operand bytes\r | |
2623 | //\r | |
2624 | Opcode = GETOPCODE (VmPtr);\r | |
2625 | Operands = GETOPERANDS (VmPtr);\r | |
2626 | \r | |
2627 | Op1Index = Op2Index = 0;\r | |
2628 | \r | |
2629 | //\r | |
2630 | // Get the indexes if present.\r | |
2631 | //\r | |
2632 | Size = 2;\r | |
2633 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r | |
2634 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2635 | Op1Index = VmReadIndex32 (VmPtr, 2);\r | |
2636 | } else {\r | |
2637 | //\r | |
2638 | // Illegal form operand1 direct with index: MOVsnd R1 Index16,..\r | |
2639 | //\r | |
2640 | EbcDebugSignalException (\r | |
2641 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2642 | EXCEPTION_FLAG_FATAL,\r | |
2643 | VmPtr\r | |
2644 | );\r | |
2645 | return EFI_UNSUPPORTED;\r | |
2646 | }\r | |
2647 | \r | |
2648 | Size += sizeof (UINT32);\r | |
2649 | }\r | |
2650 | \r | |
2651 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r | |
2652 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2653 | Op2Index = VmReadIndex32 (VmPtr, Size);\r | |
2654 | } else {\r | |
2655 | Op2Index = VmReadImmed32 (VmPtr, Size);\r | |
2656 | }\r | |
2657 | \r | |
2658 | Size += sizeof (UINT32);\r | |
2659 | }\r | |
2660 | //\r | |
2661 | // Get the data from the source.\r | |
2662 | //\r | |
2663 | Op2 = (UINT64)(INT64)(INTN)(INT64)(VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Op2Index);\r | |
2664 | if (OPERAND2_INDIRECT (Operands)) {\r | |
2665 | Op2 = (UINT64)(INT64)(INTN)(INT64)VmReadMemN (VmPtr, (UINTN) Op2);\r | |
2666 | }\r | |
2667 | //\r | |
2668 | // Now write back the result.\r | |
2669 | //\r | |
2670 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
2671 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Op2;\r | |
2672 | } else {\r | |
2673 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r | |
2674 | }\r | |
2675 | //\r | |
2676 | // Advance the instruction pointer\r | |
2677 | //\r | |
2678 | VmPtr->Ip += Size;\r | |
2679 | return EFI_SUCCESS;\r | |
2680 | }\r | |
2681 | \r | |
2682 | \r | |
2683 | /**\r | |
2684 | Execute the EBC PUSHn instruction\r | |
2685 | \r | |
2686 | Instruction syntax:\r | |
2687 | PUSHn {@}R1 {Index16|Immed16}\r | |
2688 | \r | |
2689 | @param VmPtr A pointer to a VM context.\r | |
2690 | \r | |
2691 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2692 | \r | |
2693 | **/\r | |
2694 | EFI_STATUS\r | |
2695 | ExecutePUSHn (\r | |
2696 | IN VM_CONTEXT *VmPtr\r | |
2697 | )\r | |
2698 | {\r | |
2699 | UINT8 Opcode;\r | |
2700 | UINT8 Operands;\r | |
2701 | INT16 Index16;\r | |
2702 | UINTN DataN;\r | |
2703 | \r | |
2704 | //\r | |
2705 | // Get opcode and operands\r | |
2706 | //\r | |
2707 | Opcode = GETOPCODE (VmPtr);\r | |
2708 | Operands = GETOPERANDS (VmPtr);\r | |
2709 | \r | |
2710 | //\r | |
2711 | // Get index if present\r | |
2712 | //\r | |
2713 | if ((Opcode & PUSHPOP_M_IMMDATA) != 0) {\r | |
2714 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2715 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2716 | } else {\r | |
2717 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2718 | }\r | |
2719 | \r | |
2720 | VmPtr->Ip += 4;\r | |
2721 | } else {\r | |
2722 | Index16 = 0;\r | |
2723 | VmPtr->Ip += 2;\r | |
2724 | }\r | |
2725 | //\r | |
2726 | // Get the data to push\r | |
2727 | //\r | |
2728 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2729 | DataN = VmReadMemN (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2730 | } else {\r | |
2731 | DataN = (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16);\r | |
2732 | }\r | |
2733 | //\r | |
2734 | // Adjust the stack down.\r | |
2735 | //\r | |
2736 | VmPtr->Gpr[0] -= sizeof (UINTN);\r | |
2737 | VmWriteMemN (VmPtr, (UINTN) VmPtr->Gpr[0], DataN);\r | |
2738 | return EFI_SUCCESS;\r | |
2739 | }\r | |
2740 | \r | |
2741 | \r | |
2742 | /**\r | |
2743 | Execute the EBC PUSH instruction.\r | |
2744 | \r | |
2745 | Instruction syntax:\r | |
2746 | PUSH[32|64] {@}R1 {Index16|Immed16}\r | |
2747 | \r | |
2748 | @param VmPtr A pointer to a VM context.\r | |
2749 | \r | |
2750 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2751 | \r | |
2752 | **/\r | |
2753 | EFI_STATUS\r | |
2754 | ExecutePUSH (\r | |
2755 | IN VM_CONTEXT *VmPtr\r | |
2756 | )\r | |
2757 | {\r | |
2758 | UINT8 Opcode;\r | |
2759 | UINT8 Operands;\r | |
2760 | UINT32 Data32;\r | |
2761 | UINT64 Data64;\r | |
2762 | INT16 Index16;\r | |
2763 | \r | |
2764 | //\r | |
2765 | // Get opcode and operands\r | |
2766 | //\r | |
2767 | Opcode = GETOPCODE (VmPtr);\r | |
2768 | Operands = GETOPERANDS (VmPtr);\r | |
2769 | //\r | |
2770 | // Get immediate index if present, then advance the IP.\r | |
2771 | //\r | |
2772 | if ((Opcode & PUSHPOP_M_IMMDATA) != 0) {\r | |
2773 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2774 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2775 | } else {\r | |
2776 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2777 | }\r | |
2778 | \r | |
2779 | VmPtr->Ip += 4;\r | |
2780 | } else {\r | |
2781 | Index16 = 0;\r | |
2782 | VmPtr->Ip += 2;\r | |
2783 | }\r | |
2784 | //\r | |
2785 | // Get the data to push\r | |
2786 | //\r | |
2787 | if ((Opcode & PUSHPOP_M_64) != 0) {\r | |
2788 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2789 | Data64 = VmReadMem64 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2790 | } else {\r | |
2791 | Data64 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2792 | }\r | |
2793 | //\r | |
2794 | // Adjust the stack down, then write back the data\r | |
2795 | //\r | |
2796 | VmPtr->Gpr[0] -= sizeof (UINT64);\r | |
2797 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], Data64);\r | |
2798 | } else {\r | |
2799 | //\r | |
2800 | // 32-bit data\r | |
2801 | //\r | |
2802 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2803 | Data32 = VmReadMem32 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16));\r | |
2804 | } else {\r | |
2805 | Data32 = (UINT32) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r | |
2806 | }\r | |
2807 | //\r | |
2808 | // Adjust the stack down and write the data\r | |
2809 | //\r | |
2810 | VmPtr->Gpr[0] -= sizeof (UINT32);\r | |
2811 | VmWriteMem32 (VmPtr, (UINTN) VmPtr->Gpr[0], Data32);\r | |
2812 | }\r | |
2813 | \r | |
2814 | return EFI_SUCCESS;\r | |
2815 | }\r | |
2816 | \r | |
2817 | \r | |
2818 | /**\r | |
2819 | Execute the EBC POPn instruction.\r | |
2820 | \r | |
2821 | Instruction syntax:\r | |
2822 | POPn {@}R1 {Index16|Immed16}\r | |
2823 | \r | |
2824 | @param VmPtr A pointer to a VM context.\r | |
2825 | \r | |
2826 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2827 | \r | |
2828 | **/\r | |
2829 | EFI_STATUS\r | |
2830 | ExecutePOPn (\r | |
2831 | IN VM_CONTEXT *VmPtr\r | |
2832 | )\r | |
2833 | {\r | |
2834 | UINT8 Opcode;\r | |
2835 | UINT8 Operands;\r | |
2836 | INT16 Index16;\r | |
2837 | UINTN DataN;\r | |
2838 | \r | |
2839 | //\r | |
2840 | // Get opcode and operands\r | |
2841 | //\r | |
2842 | Opcode = GETOPCODE (VmPtr);\r | |
2843 | Operands = GETOPERANDS (VmPtr);\r | |
2844 | //\r | |
2845 | // Get immediate data if present, and advance the IP\r | |
2846 | //\r | |
2847 | if ((Opcode & PUSHPOP_M_IMMDATA) != 0) {\r | |
2848 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2849 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2850 | } else {\r | |
2851 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2852 | }\r | |
2853 | \r | |
2854 | VmPtr->Ip += 4;\r | |
2855 | } else {\r | |
2856 | Index16 = 0;\r | |
2857 | VmPtr->Ip += 2;\r | |
2858 | }\r | |
2859 | //\r | |
2860 | // Read the data off the stack, then adjust the stack pointer\r | |
2861 | //\r | |
2862 | DataN = VmReadMemN (VmPtr, (UINTN) VmPtr->Gpr[0]);\r | |
2863 | VmPtr->Gpr[0] += sizeof (UINTN);\r | |
2864 | //\r | |
2865 | // Do the write-back\r | |
2866 | //\r | |
2867 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2868 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16), DataN);\r | |
2869 | } else {\r | |
2870 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (INT64) (UINT64) (UINTN) (DataN + Index16);\r | |
2871 | }\r | |
2872 | \r | |
2873 | return EFI_SUCCESS;\r | |
2874 | }\r | |
2875 | \r | |
2876 | \r | |
2877 | /**\r | |
2878 | Execute the EBC POP instruction.\r | |
2879 | \r | |
2880 | Instruction syntax:\r | |
2881 | POPn {@}R1 {Index16|Immed16}\r | |
2882 | \r | |
2883 | @param VmPtr A pointer to a VM context.\r | |
2884 | \r | |
2885 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2886 | \r | |
2887 | **/\r | |
2888 | EFI_STATUS\r | |
2889 | ExecutePOP (\r | |
2890 | IN VM_CONTEXT *VmPtr\r | |
2891 | )\r | |
2892 | {\r | |
2893 | UINT8 Opcode;\r | |
2894 | UINT8 Operands;\r | |
2895 | INT16 Index16;\r | |
2896 | INT32 Data32;\r | |
2897 | UINT64 Data64;\r | |
2898 | \r | |
2899 | //\r | |
2900 | // Get opcode and operands\r | |
2901 | //\r | |
2902 | Opcode = GETOPCODE (VmPtr);\r | |
2903 | Operands = GETOPERANDS (VmPtr);\r | |
2904 | //\r | |
2905 | // Get immediate data if present, and advance the IP.\r | |
2906 | //\r | |
2907 | if ((Opcode & PUSHPOP_M_IMMDATA) != 0) {\r | |
2908 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2909 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2910 | } else {\r | |
2911 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2912 | }\r | |
2913 | \r | |
2914 | VmPtr->Ip += 4;\r | |
2915 | } else {\r | |
2916 | Index16 = 0;\r | |
2917 | VmPtr->Ip += 2;\r | |
2918 | }\r | |
2919 | //\r | |
2920 | // Get the data off the stack, then write it to the appropriate location\r | |
2921 | //\r | |
2922 | if ((Opcode & PUSHPOP_M_64) != 0) {\r | |
2923 | //\r | |
2924 | // Read the data off the stack, then adjust the stack pointer\r | |
2925 | //\r | |
2926 | Data64 = VmReadMem64 (VmPtr, (UINTN) VmPtr->Gpr[0]);\r | |
2927 | VmPtr->Gpr[0] += sizeof (UINT64);\r | |
2928 | //\r | |
2929 | // Do the write-back\r | |
2930 | //\r | |
2931 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2932 | VmWriteMem64 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16), Data64);\r | |
2933 | } else {\r | |
2934 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Data64 + Index16;\r | |
2935 | }\r | |
2936 | } else {\r | |
2937 | //\r | |
2938 | // 32-bit pop. Read it off the stack and adjust the stack pointer\r | |
2939 | //\r | |
2940 | Data32 = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->Gpr[0]);\r | |
2941 | VmPtr->Gpr[0] += sizeof (UINT32);\r | |
2942 | //\r | |
2943 | // Do the write-back\r | |
2944 | //\r | |
2945 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2946 | VmWriteMem32 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16), Data32);\r | |
2947 | } else {\r | |
2948 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (INT64) Data32 + Index16;\r | |
2949 | }\r | |
2950 | }\r | |
2951 | \r | |
2952 | return EFI_SUCCESS;\r | |
2953 | }\r | |
2954 | \r | |
2955 | \r | |
2956 | /**\r | |
2957 | Implements the EBC CALL instruction.\r | |
2958 | \r | |
2959 | Instruction format:\r | |
2960 | CALL64 Immed64\r | |
2961 | CALL32 {@}R1 {Immed32|Index32}\r | |
2962 | CALLEX64 Immed64\r | |
2963 | CALLEX16 {@}R1 {Immed32}\r | |
2964 | \r | |
2965 | If Rx == R0, then it's a PC relative call to PC = PC + imm32.\r | |
2966 | \r | |
2967 | @param VmPtr A pointer to a VM context.\r | |
2968 | \r | |
2969 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
2970 | \r | |
2971 | **/\r | |
2972 | EFI_STATUS\r | |
2973 | ExecuteCALL (\r | |
2974 | IN VM_CONTEXT *VmPtr\r | |
2975 | )\r | |
2976 | {\r | |
2977 | UINT8 Opcode;\r | |
2978 | UINT8 Operands;\r | |
2979 | INT32 Immed32;\r | |
2980 | UINT8 Size;\r | |
2981 | INT64 Immed64;\r | |
2982 | VOID *FramePtr;\r | |
2983 | \r | |
2984 | //\r | |
2985 | // Get opcode and operands\r | |
2986 | //\r | |
2987 | Opcode = GETOPCODE (VmPtr);\r | |
2988 | Operands = GETOPERANDS (VmPtr);\r | |
2989 | \r | |
2990 | if ((Operands & OPERAND_M_NATIVE_CALL) != 0) {\r | |
2991 | EbcDebuggerHookCALLEXStart (VmPtr);\r | |
2992 | } else {\r | |
2993 | EbcDebuggerHookCALLStart (VmPtr);\r | |
2994 | }\r | |
2995 | \r | |
2996 | //\r | |
2997 | // Assign these as well to avoid compiler warnings\r | |
2998 | //\r | |
2999 | Immed64 = 0;\r | |
3000 | Immed32 = 0;\r | |
3001 | \r | |
3002 | FramePtr = VmPtr->FramePtr;\r | |
3003 | //\r | |
3004 | // Determine the instruction size, and get immediate data if present\r | |
3005 | //\r | |
3006 | if ((Opcode & OPCODE_M_IMMDATA) != 0) {\r | |
3007 | if ((Opcode & OPCODE_M_IMMDATA64) != 0) {\r | |
3008 | Immed64 = VmReadImmed64 (VmPtr, 2);\r | |
3009 | Size = 10;\r | |
3010 | } else {\r | |
3011 | //\r | |
3012 | // If register operand is indirect, then the immediate data is an index\r | |
3013 | //\r | |
3014 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3015 | Immed32 = VmReadIndex32 (VmPtr, 2);\r | |
3016 | } else {\r | |
3017 | Immed32 = VmReadImmed32 (VmPtr, 2);\r | |
3018 | }\r | |
3019 | \r | |
3020 | Size = 6;\r | |
3021 | }\r | |
3022 | } else {\r | |
3023 | Size = 2;\r | |
3024 | }\r | |
3025 | //\r | |
3026 | // If it's a call to EBC, adjust the stack pointer down 16 bytes and\r | |
3027 | // put our return address and frame pointer on the VM stack.\r | |
3028 | //\r | |
3029 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
3030 | VmPtr->Gpr[0] -= 8;\r | |
3031 | VmWriteMemN (VmPtr, (UINTN) VmPtr->Gpr[0], (UINTN) FramePtr);\r | |
3032 | VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->Gpr[0];\r | |
3033 | VmPtr->Gpr[0] -= 8;\r | |
3034 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (UINTN) (VmPtr->Ip + Size));\r | |
3035 | }\r | |
3036 | //\r | |
3037 | // If 64-bit data, then absolute jump only\r | |
3038 | //\r | |
3039 | if ((Opcode & OPCODE_M_IMMDATA64) != 0) {\r | |
3040 | //\r | |
3041 | // Native or EBC call?\r | |
3042 | //\r | |
3043 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
3044 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
3045 | } else {\r | |
3046 | //\r | |
3047 | // Call external function, get the return value, and advance the IP\r | |
3048 | //\r | |
3049 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->Gpr[0], FramePtr, Size);\r | |
3050 | }\r | |
3051 | } else {\r | |
3052 | //\r | |
3053 | // Get the register data. If operand1 == 0, then ignore register and\r | |
3054 | // take immediate data as relative or absolute address.\r | |
3055 | // Compiler should take care of upper bits if 32-bit machine.\r | |
3056 | //\r | |
3057 | if (OPERAND1_REGNUM (Operands) != 0) {\r | |
3058 | Immed64 = (UINT64) (UINTN) VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r | |
3059 | }\r | |
3060 | //\r | |
3061 | // Get final address\r | |
3062 | //\r | |
3063 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3064 | Immed64 = (INT64) (UINT64) (UINTN) VmReadMemN (VmPtr, (UINTN) (Immed64 + Immed32));\r | |
3065 | } else {\r | |
3066 | Immed64 += Immed32;\r | |
3067 | }\r | |
3068 | //\r | |
3069 | // Now determine if external call, and then if relative or absolute\r | |
3070 | //\r | |
3071 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
3072 | //\r | |
3073 | // EBC call. Relative or absolute? If relative, then it's relative to the\r | |
3074 | // start of the next instruction.\r | |
3075 | //\r | |
3076 | if ((Operands & OPERAND_M_RELATIVE_ADDR) != 0) {\r | |
3077 | VmPtr->Ip += Immed64 + Size;\r | |
3078 | } else {\r | |
3079 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
3080 | }\r | |
3081 | } else {\r | |
3082 | //\r | |
3083 | // Native call. Relative or absolute?\r | |
3084 | //\r | |
3085 | if ((Operands & OPERAND_M_RELATIVE_ADDR) != 0) {\r | |
3086 | EbcLLCALLEX (VmPtr, (UINTN) (Immed64 + VmPtr->Ip + Size), (UINTN) VmPtr->Gpr[0], FramePtr, Size);\r | |
3087 | } else {\r | |
3088 | if ((VmPtr->StopFlags & STOPFLAG_BREAK_ON_CALLEX) != 0) {\r | |
3089 | CpuBreakpoint ();\r | |
3090 | }\r | |
3091 | \r | |
3092 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->Gpr[0], FramePtr, Size);\r | |
3093 | }\r | |
3094 | }\r | |
3095 | }\r | |
3096 | \r | |
3097 | if ((Operands & OPERAND_M_NATIVE_CALL) != 0) {\r | |
3098 | EbcDebuggerHookCALLEXEnd (VmPtr);\r | |
3099 | } else {\r | |
3100 | EbcDebuggerHookCALLEnd (VmPtr);\r | |
3101 | }\r | |
3102 | \r | |
3103 | return EFI_SUCCESS;\r | |
3104 | }\r | |
3105 | \r | |
3106 | \r | |
3107 | /**\r | |
3108 | Execute the EBC RET instruction.\r | |
3109 | \r | |
3110 | Instruction syntax:\r | |
3111 | RET\r | |
3112 | \r | |
3113 | @param VmPtr A pointer to a VM context.\r | |
3114 | \r | |
3115 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
3116 | \r | |
3117 | **/\r | |
3118 | EFI_STATUS\r | |
3119 | ExecuteRET (\r | |
3120 | IN VM_CONTEXT *VmPtr\r | |
3121 | )\r | |
3122 | {\r | |
3123 | \r | |
3124 | EbcDebuggerHookRETStart (VmPtr);\r | |
3125 | \r | |
3126 | //\r | |
3127 | // If we're at the top of the stack, then simply set the done\r | |
3128 | // flag and return\r | |
3129 | //\r | |
3130 | if (VmPtr->StackRetAddr == (UINT64) VmPtr->Gpr[0]) {\r | |
3131 | VmPtr->StopFlags |= STOPFLAG_APP_DONE;\r | |
3132 | } else {\r | |
3133 | //\r | |
3134 | // Pull the return address off the VM app's stack and set the IP\r | |
3135 | // to it\r | |
3136 | //\r | |
3137 | if (!IS_ALIGNED ((UINTN) VmPtr->Gpr[0], sizeof (UINT16))) {\r | |
3138 | EbcDebugSignalException (\r | |
3139 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
3140 | EXCEPTION_FLAG_FATAL,\r | |
3141 | VmPtr\r | |
3142 | );\r | |
3143 | }\r | |
3144 | //\r | |
3145 | // Restore the IP and frame pointer from the stack\r | |
3146 | //\r | |
3147 | VmPtr->Ip = (VMIP) (UINTN) VmReadMem64 (VmPtr, (UINTN) VmPtr->Gpr[0]);\r | |
3148 | VmPtr->Gpr[0] += 8;\r | |
3149 | VmPtr->FramePtr = (VOID *) VmReadMemN (VmPtr, (UINTN) VmPtr->Gpr[0]);\r | |
3150 | VmPtr->Gpr[0] += 8;\r | |
3151 | }\r | |
3152 | \r | |
3153 | \r | |
3154 | EbcDebuggerHookRETEnd (VmPtr);\r | |
3155 | \r | |
3156 | return EFI_SUCCESS;\r | |
3157 | }\r | |
3158 | \r | |
3159 | \r | |
3160 | /**\r | |
3161 | Execute the EBC CMP instruction.\r | |
3162 | \r | |
3163 | Instruction syntax:\r | |
3164 | CMP[32|64][eq|lte|gte|ulte|ugte] R1, {@}R2 {Index16|Immed16}\r | |
3165 | \r | |
3166 | @param VmPtr A pointer to a VM context.\r | |
3167 | \r | |
3168 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
3169 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
3170 | \r | |
3171 | **/\r | |
3172 | EFI_STATUS\r | |
3173 | ExecuteCMP (\r | |
3174 | IN VM_CONTEXT *VmPtr\r | |
3175 | )\r | |
3176 | {\r | |
3177 | UINT8 Opcode;\r | |
3178 | UINT8 Operands;\r | |
3179 | UINT8 Size;\r | |
3180 | INT16 Index16;\r | |
3181 | UINT32 Flag;\r | |
3182 | INT64 Op2;\r | |
3183 | INT64 Op1;\r | |
3184 | \r | |
3185 | //\r | |
3186 | // Get opcode and operands\r | |
3187 | //\r | |
3188 | Opcode = GETOPCODE (VmPtr);\r | |
3189 | Operands = GETOPERANDS (VmPtr);\r | |
3190 | //\r | |
3191 | // Get the register data we're going to compare to\r | |
3192 | //\r | |
3193 | Op1 = VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r | |
3194 | //\r | |
3195 | // Get immediate data\r | |
3196 | //\r | |
3197 | if ((Opcode & OPCODE_M_IMMDATA) != 0) {\r | |
3198 | if (OPERAND2_INDIRECT (Operands)) {\r | |
3199 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
3200 | } else {\r | |
3201 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
3202 | }\r | |
3203 | \r | |
3204 | Size = 4;\r | |
3205 | } else {\r | |
3206 | Index16 = 0;\r | |
3207 | Size = 2;\r | |
3208 | }\r | |
3209 | //\r | |
3210 | // Now get Op2\r | |
3211 | //\r | |
3212 | if (OPERAND2_INDIRECT (Operands)) {\r | |
3213 | if ((Opcode & OPCODE_M_64BIT) != 0) {\r | |
3214 | Op2 = (INT64) VmReadMem64 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index16));\r | |
3215 | } else {\r | |
3216 | //\r | |
3217 | // 32-bit operations. 0-extend the values for all cases.\r | |
3218 | //\r | |
3219 | Op2 = (INT64) (UINT64) ((UINT32) VmReadMem32 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index16)));\r | |
3220 | }\r | |
3221 | } else {\r | |
3222 | Op2 = VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index16;\r | |
3223 | }\r | |
3224 | //\r | |
3225 | // Now do the compare\r | |
3226 | //\r | |
3227 | Flag = 0;\r | |
3228 | if ((Opcode & OPCODE_M_64BIT) != 0) {\r | |
3229 | //\r | |
3230 | // 64-bit compares\r | |
3231 | //\r | |
3232 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
3233 | case OPCODE_CMPEQ:\r | |
3234 | if (Op1 == Op2) {\r | |
3235 | Flag = 1;\r | |
3236 | }\r | |
3237 | break;\r | |
3238 | \r | |
3239 | case OPCODE_CMPLTE:\r | |
3240 | if (Op1 <= Op2) {\r | |
3241 | Flag = 1;\r | |
3242 | }\r | |
3243 | break;\r | |
3244 | \r | |
3245 | case OPCODE_CMPGTE:\r | |
3246 | if (Op1 >= Op2) {\r | |
3247 | Flag = 1;\r | |
3248 | }\r | |
3249 | break;\r | |
3250 | \r | |
3251 | case OPCODE_CMPULTE:\r | |
3252 | if ((UINT64) Op1 <= (UINT64) Op2) {\r | |
3253 | Flag = 1;\r | |
3254 | }\r | |
3255 | break;\r | |
3256 | \r | |
3257 | case OPCODE_CMPUGTE:\r | |
3258 | if ((UINT64) Op1 >= (UINT64) Op2) {\r | |
3259 | Flag = 1;\r | |
3260 | }\r | |
3261 | break;\r | |
3262 | \r | |
3263 | default:\r | |
3264 | ASSERT (0);\r | |
3265 | }\r | |
3266 | } else {\r | |
3267 | //\r | |
3268 | // 32-bit compares\r | |
3269 | //\r | |
3270 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
3271 | case OPCODE_CMPEQ:\r | |
3272 | if ((INT32) Op1 == (INT32) Op2) {\r | |
3273 | Flag = 1;\r | |
3274 | }\r | |
3275 | break;\r | |
3276 | \r | |
3277 | case OPCODE_CMPLTE:\r | |
3278 | if ((INT32) Op1 <= (INT32) Op2) {\r | |
3279 | Flag = 1;\r | |
3280 | }\r | |
3281 | break;\r | |
3282 | \r | |
3283 | case OPCODE_CMPGTE:\r | |
3284 | if ((INT32) Op1 >= (INT32) Op2) {\r | |
3285 | Flag = 1;\r | |
3286 | }\r | |
3287 | break;\r | |
3288 | \r | |
3289 | case OPCODE_CMPULTE:\r | |
3290 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
3291 | Flag = 1;\r | |
3292 | }\r | |
3293 | break;\r | |
3294 | \r | |
3295 | case OPCODE_CMPUGTE:\r | |
3296 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
3297 | Flag = 1;\r | |
3298 | }\r | |
3299 | break;\r | |
3300 | \r | |
3301 | default:\r | |
3302 | ASSERT (0);\r | |
3303 | }\r | |
3304 | }\r | |
3305 | //\r | |
3306 | // Now set the flag accordingly for the comparison\r | |
3307 | //\r | |
3308 | if (Flag != 0) {\r | |
3309 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r | |
3310 | } else {\r | |
3311 | VMFLAG_CLEAR (VmPtr, (UINT64)VMFLAGS_CC);\r | |
3312 | }\r | |
3313 | //\r | |
3314 | // Advance the IP\r | |
3315 | //\r | |
3316 | VmPtr->Ip += Size;\r | |
3317 | return EFI_SUCCESS;\r | |
3318 | }\r | |
3319 | \r | |
3320 | \r | |
3321 | /**\r | |
3322 | Execute the EBC CMPI instruction\r | |
3323 | \r | |
3324 | Instruction syntax:\r | |
3325 | CMPI[32|64]{w|d}[eq|lte|gte|ulte|ugte] {@}Rx {Index16}, Immed16|Immed32\r | |
3326 | \r | |
3327 | @param VmPtr A pointer to a VM context.\r | |
3328 | \r | |
3329 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
3330 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
3331 | \r | |
3332 | **/\r | |
3333 | EFI_STATUS\r | |
3334 | ExecuteCMPI (\r | |
3335 | IN VM_CONTEXT *VmPtr\r | |
3336 | )\r | |
3337 | {\r | |
3338 | UINT8 Opcode;\r | |
3339 | UINT8 Operands;\r | |
3340 | UINT8 Size;\r | |
3341 | INT64 Op1;\r | |
3342 | INT64 Op2;\r | |
3343 | INT16 Index16;\r | |
3344 | UINT32 Flag;\r | |
3345 | \r | |
3346 | //\r | |
3347 | // Get opcode and operands\r | |
3348 | //\r | |
3349 | Opcode = GETOPCODE (VmPtr);\r | |
3350 | Operands = GETOPERANDS (VmPtr);\r | |
3351 | \r | |
3352 | //\r | |
3353 | // Get operand1 index if present\r | |
3354 | //\r | |
3355 | Size = 2;\r | |
3356 | if ((Operands & OPERAND_M_CMPI_INDEX) != 0) {\r | |
3357 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
3358 | Size += 2;\r | |
3359 | } else {\r | |
3360 | Index16 = 0;\r | |
3361 | }\r | |
3362 | //\r | |
3363 | // Get operand1 data we're going to compare to\r | |
3364 | //\r | |
3365 | Op1 = (INT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r | |
3366 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3367 | //\r | |
3368 | // Indirect operand1. Fetch 32 or 64-bit value based on compare size.\r | |
3369 | //\r | |
3370 | if ((Opcode & OPCODE_M_CMPI64) != 0) {\r | |
3371 | Op1 = (INT64) VmReadMem64 (VmPtr, (UINTN) Op1 + Index16);\r | |
3372 | } else {\r | |
3373 | Op1 = (INT64) VmReadMem32 (VmPtr, (UINTN) Op1 + Index16);\r | |
3374 | }\r | |
3375 | } else {\r | |
3376 | //\r | |
3377 | // Better not have been an index with direct. That is, CMPI R1 Index,...\r | |
3378 | // is illegal.\r | |
3379 | //\r | |
3380 | if ((Operands & OPERAND_M_CMPI_INDEX) != 0) {\r | |
3381 | EbcDebugSignalException (\r | |
3382 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
3383 | EXCEPTION_FLAG_ERROR,\r | |
3384 | VmPtr\r | |
3385 | );\r | |
3386 | VmPtr->Ip += Size;\r | |
3387 | return EFI_UNSUPPORTED;\r | |
3388 | }\r | |
3389 | }\r | |
3390 | //\r | |
3391 | // Get immediate data -- 16- or 32-bit sign extended\r | |
3392 | //\r | |
3393 | if ((Opcode & OPCODE_M_CMPI32_DATA) != 0) {\r | |
3394 | Op2 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
3395 | Size += 4;\r | |
3396 | } else {\r | |
3397 | //\r | |
3398 | // 16-bit immediate data. Sign extend always.\r | |
3399 | //\r | |
3400 | Op2 = (INT64) ((INT16) VmReadImmed16 (VmPtr, Size));\r | |
3401 | Size += 2;\r | |
3402 | }\r | |
3403 | //\r | |
3404 | // Now do the compare\r | |
3405 | //\r | |
3406 | Flag = 0;\r | |
3407 | if ((Opcode & OPCODE_M_CMPI64) != 0) {\r | |
3408 | //\r | |
3409 | // 64 bit comparison\r | |
3410 | //\r | |
3411 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
3412 | case OPCODE_CMPIEQ:\r | |
3413 | if (Op1 == (INT64) Op2) {\r | |
3414 | Flag = 1;\r | |
3415 | }\r | |
3416 | break;\r | |
3417 | \r | |
3418 | case OPCODE_CMPILTE:\r | |
3419 | if (Op1 <= (INT64) Op2) {\r | |
3420 | Flag = 1;\r | |
3421 | }\r | |
3422 | break;\r | |
3423 | \r | |
3424 | case OPCODE_CMPIGTE:\r | |
3425 | if (Op1 >= (INT64) Op2) {\r | |
3426 | Flag = 1;\r | |
3427 | }\r | |
3428 | break;\r | |
3429 | \r | |
3430 | case OPCODE_CMPIULTE:\r | |
3431 | if ((UINT64) Op1 <= (UINT64) ((UINT32) Op2)) {\r | |
3432 | Flag = 1;\r | |
3433 | }\r | |
3434 | break;\r | |
3435 | \r | |
3436 | case OPCODE_CMPIUGTE:\r | |
3437 | if ((UINT64) Op1 >= (UINT64) ((UINT32) Op2)) {\r | |
3438 | Flag = 1;\r | |
3439 | }\r | |
3440 | break;\r | |
3441 | \r | |
3442 | default:\r | |
3443 | ASSERT (0);\r | |
3444 | }\r | |
3445 | } else {\r | |
3446 | //\r | |
3447 | // 32-bit comparisons\r | |
3448 | //\r | |
3449 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
3450 | case OPCODE_CMPIEQ:\r | |
3451 | if ((INT32) Op1 == Op2) {\r | |
3452 | Flag = 1;\r | |
3453 | }\r | |
3454 | break;\r | |
3455 | \r | |
3456 | case OPCODE_CMPILTE:\r | |
3457 | if ((INT32) Op1 <= Op2) {\r | |
3458 | Flag = 1;\r | |
3459 | }\r | |
3460 | break;\r | |
3461 | \r | |
3462 | case OPCODE_CMPIGTE:\r | |
3463 | if ((INT32) Op1 >= Op2) {\r | |
3464 | Flag = 1;\r | |
3465 | }\r | |
3466 | break;\r | |
3467 | \r | |
3468 | case OPCODE_CMPIULTE:\r | |
3469 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
3470 | Flag = 1;\r | |
3471 | }\r | |
3472 | break;\r | |
3473 | \r | |
3474 | case OPCODE_CMPIUGTE:\r | |
3475 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
3476 | Flag = 1;\r | |
3477 | }\r | |
3478 | break;\r | |
3479 | \r | |
3480 | default:\r | |
3481 | ASSERT (0);\r | |
3482 | }\r | |
3483 | }\r | |
3484 | //\r | |
3485 | // Now set the flag accordingly for the comparison\r | |
3486 | //\r | |
3487 | if (Flag != 0) {\r | |
3488 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r | |
3489 | } else {\r | |
3490 | VMFLAG_CLEAR (VmPtr, (UINT64)VMFLAGS_CC);\r | |
3491 | }\r | |
3492 | //\r | |
3493 | // Advance the IP\r | |
3494 | //\r | |
3495 | VmPtr->Ip += Size;\r | |
3496 | return EFI_SUCCESS;\r | |
3497 | }\r | |
3498 | \r | |
3499 | \r | |
3500 | /**\r | |
3501 | Execute the EBC NOT instruction.s\r | |
3502 | \r | |
3503 | Instruction syntax:\r | |
3504 | NOT[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3505 | \r | |
3506 | @param VmPtr A pointer to a VM context.\r | |
3507 | @param Op1 Operand 1 from the instruction\r | |
3508 | @param Op2 Operand 2 from the instruction\r | |
3509 | \r | |
3510 | @return ~Op2\r | |
3511 | \r | |
3512 | **/\r | |
3513 | UINT64\r | |
3514 | ExecuteNOT (\r | |
3515 | IN VM_CONTEXT *VmPtr,\r | |
3516 | IN UINT64 Op1,\r | |
3517 | IN UINT64 Op2\r | |
3518 | )\r | |
3519 | {\r | |
3520 | return ~Op2;\r | |
3521 | }\r | |
3522 | \r | |
3523 | \r | |
3524 | /**\r | |
3525 | Execute the EBC NEG instruction.\r | |
3526 | \r | |
3527 | Instruction syntax:\r | |
3528 | NEG[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3529 | \r | |
3530 | @param VmPtr A pointer to a VM context.\r | |
3531 | @param Op1 Operand 1 from the instruction\r | |
3532 | @param Op2 Operand 2 from the instruction\r | |
3533 | \r | |
3534 | @return Op2 * -1\r | |
3535 | \r | |
3536 | **/\r | |
3537 | UINT64\r | |
3538 | ExecuteNEG (\r | |
3539 | IN VM_CONTEXT *VmPtr,\r | |
3540 | IN UINT64 Op1,\r | |
3541 | IN UINT64 Op2\r | |
3542 | )\r | |
3543 | {\r | |
3544 | return ~Op2 + 1;\r | |
3545 | }\r | |
3546 | \r | |
3547 | \r | |
3548 | /**\r | |
3549 | Execute the EBC ADD instruction.\r | |
3550 | \r | |
3551 | Instruction syntax:\r | |
3552 | ADD[32|64] {@}R1, {@}R2 {Index16}\r | |
3553 | \r | |
3554 | @param VmPtr A pointer to a VM context.\r | |
3555 | @param Op1 Operand 1 from the instruction\r | |
3556 | @param Op2 Operand 2 from the instruction\r | |
3557 | \r | |
3558 | @return Op1 + Op2\r | |
3559 | \r | |
3560 | **/\r | |
3561 | UINT64\r | |
3562 | ExecuteADD (\r | |
3563 | IN VM_CONTEXT *VmPtr,\r | |
3564 | IN UINT64 Op1,\r | |
3565 | IN UINT64 Op2\r | |
3566 | )\r | |
3567 | {\r | |
3568 | return Op1 + Op2;\r | |
3569 | }\r | |
3570 | \r | |
3571 | \r | |
3572 | /**\r | |
3573 | Execute the EBC SUB instruction.\r | |
3574 | \r | |
3575 | Instruction syntax:\r | |
3576 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3577 | \r | |
3578 | @param VmPtr A pointer to a VM context.\r | |
3579 | @param Op1 Operand 1 from the instruction\r | |
3580 | @param Op2 Operand 2 from the instruction\r | |
3581 | \r | |
3582 | @return Op1 - Op2\r | |
3583 | \r | |
3584 | **/\r | |
3585 | UINT64\r | |
3586 | ExecuteSUB (\r | |
3587 | IN VM_CONTEXT *VmPtr,\r | |
3588 | IN UINT64 Op1,\r | |
3589 | IN UINT64 Op2\r | |
3590 | )\r | |
3591 | {\r | |
3592 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r | |
3593 | return (UINT64) ((INT64) ((INT64) Op1 - (INT64) Op2));\r | |
3594 | } else {\r | |
3595 | return (UINT64) ((INT64) ((INT32) ((INT32) Op1 - (INT32) Op2)));\r | |
3596 | }\r | |
3597 | }\r | |
3598 | \r | |
3599 | \r | |
3600 | /**\r | |
3601 | Execute the EBC MUL instruction.\r | |
3602 | \r | |
3603 | Instruction syntax:\r | |
3604 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3605 | \r | |
3606 | @param VmPtr A pointer to a VM context.\r | |
3607 | @param Op1 Operand 1 from the instruction\r | |
3608 | @param Op2 Operand 2 from the instruction\r | |
3609 | \r | |
3610 | @return Op1 * Op2\r | |
3611 | \r | |
3612 | **/\r | |
3613 | UINT64\r | |
3614 | ExecuteMUL (\r | |
3615 | IN VM_CONTEXT *VmPtr,\r | |
3616 | IN UINT64 Op1,\r | |
3617 | IN UINT64 Op2\r | |
3618 | )\r | |
3619 | {\r | |
3620 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r | |
3621 | return MultS64x64 ((INT64)Op1, (INT64)Op2);\r | |
3622 | } else {\r | |
3623 | return (UINT64) ((INT64) ((INT32) ((INT32) Op1 * (INT32) Op2)));\r | |
3624 | }\r | |
3625 | }\r | |
3626 | \r | |
3627 | \r | |
3628 | /**\r | |
3629 | Execute the EBC MULU instruction\r | |
3630 | \r | |
3631 | Instruction syntax:\r | |
3632 | MULU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3633 | \r | |
3634 | @param VmPtr A pointer to a VM context.\r | |
3635 | @param Op1 Operand 1 from the instruction\r | |
3636 | @param Op2 Operand 2 from the instruction\r | |
3637 | \r | |
3638 | @return (unsigned)Op1 * (unsigned)Op2\r | |
3639 | \r | |
3640 | **/\r | |
3641 | UINT64\r | |
3642 | ExecuteMULU (\r | |
3643 | IN VM_CONTEXT *VmPtr,\r | |
3644 | IN UINT64 Op1,\r | |
3645 | IN UINT64 Op2\r | |
3646 | )\r | |
3647 | {\r | |
3648 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r | |
3649 | return MultU64x64 (Op1, Op2);\r | |
3650 | } else {\r | |
3651 | return (UINT64) ((UINT32) ((UINT32) Op1 * (UINT32) Op2));\r | |
3652 | }\r | |
3653 | }\r | |
3654 | \r | |
3655 | \r | |
3656 | /**\r | |
3657 | Execute the EBC DIV instruction.\r | |
3658 | \r | |
3659 | Instruction syntax:\r | |
3660 | DIV[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3661 | \r | |
3662 | @param VmPtr A pointer to a VM context.\r | |
3663 | @param Op1 Operand 1 from the instruction\r | |
3664 | @param Op2 Operand 2 from the instruction\r | |
3665 | \r | |
3666 | @return Op1 / Op2\r | |
3667 | \r | |
3668 | **/\r | |
3669 | UINT64\r | |
3670 | ExecuteDIV (\r | |
3671 | IN VM_CONTEXT *VmPtr,\r | |
3672 | IN UINT64 Op1,\r | |
3673 | IN UINT64 Op2\r | |
3674 | )\r | |
3675 | {\r | |
3676 | INT64 Remainder;\r | |
3677 | \r | |
3678 | //\r | |
3679 | // Check for divide-by-0\r | |
3680 | //\r | |
3681 | if (Op2 == 0) {\r | |
3682 | EbcDebugSignalException (\r | |
3683 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3684 | EXCEPTION_FLAG_FATAL,\r | |
3685 | VmPtr\r | |
3686 | );\r | |
3687 | \r | |
3688 | return 0;\r | |
3689 | } else {\r | |
3690 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r | |
3691 | return (UINT64) (DivS64x64Remainder (Op1, Op2, &Remainder));\r | |
3692 | } else {\r | |
3693 | return (UINT64) ((INT64) ((INT32) Op1 / (INT32) Op2));\r | |
3694 | }\r | |
3695 | }\r | |
3696 | }\r | |
3697 | \r | |
3698 | \r | |
3699 | /**\r | |
3700 | Execute the EBC DIVU instruction\r | |
3701 | \r | |
3702 | Instruction syntax:\r | |
3703 | DIVU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3704 | \r | |
3705 | @param VmPtr A pointer to a VM context.\r | |
3706 | @param Op1 Operand 1 from the instruction\r | |
3707 | @param Op2 Operand 2 from the instruction\r | |
3708 | \r | |
3709 | @return (unsigned)Op1 / (unsigned)Op2\r | |
3710 | \r | |
3711 | **/\r | |
3712 | UINT64\r | |
3713 | ExecuteDIVU (\r | |
3714 | IN VM_CONTEXT *VmPtr,\r | |
3715 | IN UINT64 Op1,\r | |
3716 | IN UINT64 Op2\r | |
3717 | )\r | |
3718 | {\r | |
3719 | UINT64 Remainder;\r | |
3720 | \r | |
3721 | //\r | |
3722 | // Check for divide-by-0\r | |
3723 | //\r | |
3724 | if (Op2 == 0) {\r | |
3725 | EbcDebugSignalException (\r | |
3726 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3727 | EXCEPTION_FLAG_FATAL,\r | |
3728 | VmPtr\r | |
3729 | );\r | |
3730 | return 0;\r | |
3731 | } else {\r | |
3732 | //\r | |
3733 | // Get the destination register\r | |
3734 | //\r | |
3735 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r | |
3736 | return (UINT64) (DivU64x64Remainder (Op1, Op2, &Remainder));\r | |
3737 | } else {\r | |
3738 | return (UINT64) ((UINT32) Op1 / (UINT32) Op2);\r | |
3739 | }\r | |
3740 | }\r | |
3741 | }\r | |
3742 | \r | |
3743 | \r | |
3744 | /**\r | |
3745 | Execute the EBC MOD instruction.\r | |
3746 | \r | |
3747 | Instruction syntax:\r | |
3748 | MOD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3749 | \r | |
3750 | @param VmPtr A pointer to a VM context.\r | |
3751 | @param Op1 Operand 1 from the instruction\r | |
3752 | @param Op2 Operand 2 from the instruction\r | |
3753 | \r | |
3754 | @return Op1 MODULUS Op2\r | |
3755 | \r | |
3756 | **/\r | |
3757 | UINT64\r | |
3758 | ExecuteMOD (\r | |
3759 | IN VM_CONTEXT *VmPtr,\r | |
3760 | IN UINT64 Op1,\r | |
3761 | IN UINT64 Op2\r | |
3762 | )\r | |
3763 | {\r | |
3764 | INT64 Remainder;\r | |
3765 | \r | |
3766 | //\r | |
3767 | // Check for divide-by-0\r | |
3768 | //\r | |
3769 | if (Op2 == 0) {\r | |
3770 | EbcDebugSignalException (\r | |
3771 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3772 | EXCEPTION_FLAG_FATAL,\r | |
3773 | VmPtr\r | |
3774 | );\r | |
3775 | return 0;\r | |
3776 | } else {\r | |
3777 | DivS64x64Remainder ((INT64)Op1, (INT64)Op2, &Remainder);\r | |
3778 | return Remainder;\r | |
3779 | }\r | |
3780 | }\r | |
3781 | \r | |
3782 | \r | |
3783 | /**\r | |
3784 | Execute the EBC MODU instruction.\r | |
3785 | \r | |
3786 | Instruction syntax:\r | |
3787 | MODU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3788 | \r | |
3789 | @param VmPtr A pointer to a VM context.\r | |
3790 | @param Op1 Operand 1 from the instruction\r | |
3791 | @param Op2 Operand 2 from the instruction\r | |
3792 | \r | |
3793 | @return Op1 UNSIGNED_MODULUS Op2\r | |
3794 | \r | |
3795 | **/\r | |
3796 | UINT64\r | |
3797 | ExecuteMODU (\r | |
3798 | IN VM_CONTEXT *VmPtr,\r | |
3799 | IN UINT64 Op1,\r | |
3800 | IN UINT64 Op2\r | |
3801 | )\r | |
3802 | {\r | |
3803 | UINT64 Remainder;\r | |
3804 | \r | |
3805 | //\r | |
3806 | // Check for divide-by-0\r | |
3807 | //\r | |
3808 | if (Op2 == 0) {\r | |
3809 | EbcDebugSignalException (\r | |
3810 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3811 | EXCEPTION_FLAG_FATAL,\r | |
3812 | VmPtr\r | |
3813 | );\r | |
3814 | return 0;\r | |
3815 | } else {\r | |
3816 | DivU64x64Remainder (Op1, Op2, &Remainder);\r | |
3817 | return Remainder;\r | |
3818 | }\r | |
3819 | }\r | |
3820 | \r | |
3821 | \r | |
3822 | /**\r | |
3823 | Execute the EBC AND instruction.\r | |
3824 | \r | |
3825 | Instruction syntax:\r | |
3826 | AND[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3827 | \r | |
3828 | @param VmPtr A pointer to a VM context.\r | |
3829 | @param Op1 Operand 1 from the instruction\r | |
3830 | @param Op2 Operand 2 from the instruction\r | |
3831 | \r | |
3832 | @return Op1 AND Op2\r | |
3833 | \r | |
3834 | **/\r | |
3835 | UINT64\r | |
3836 | ExecuteAND (\r | |
3837 | IN VM_CONTEXT *VmPtr,\r | |
3838 | IN UINT64 Op1,\r | |
3839 | IN UINT64 Op2\r | |
3840 | )\r | |
3841 | {\r | |
3842 | return Op1 & Op2;\r | |
3843 | }\r | |
3844 | \r | |
3845 | \r | |
3846 | /**\r | |
3847 | Execute the EBC OR instruction.\r | |
3848 | \r | |
3849 | Instruction syntax:\r | |
3850 | OR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3851 | \r | |
3852 | @param VmPtr A pointer to a VM context.\r | |
3853 | @param Op1 Operand 1 from the instruction\r | |
3854 | @param Op2 Operand 2 from the instruction\r | |
3855 | \r | |
3856 | @return Op1 OR Op2\r | |
3857 | \r | |
3858 | **/\r | |
3859 | UINT64\r | |
3860 | ExecuteOR (\r | |
3861 | IN VM_CONTEXT *VmPtr,\r | |
3862 | IN UINT64 Op1,\r | |
3863 | IN UINT64 Op2\r | |
3864 | )\r | |
3865 | {\r | |
3866 | return Op1 | Op2;\r | |
3867 | }\r | |
3868 | \r | |
3869 | \r | |
3870 | /**\r | |
3871 | Execute the EBC XOR instruction.\r | |
3872 | \r | |
3873 | Instruction syntax:\r | |
3874 | XOR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3875 | \r | |
3876 | @param VmPtr A pointer to a VM context.\r | |
3877 | @param Op1 Operand 1 from the instruction\r | |
3878 | @param Op2 Operand 2 from the instruction\r | |
3879 | \r | |
3880 | @return Op1 XOR Op2\r | |
3881 | \r | |
3882 | **/\r | |
3883 | UINT64\r | |
3884 | ExecuteXOR (\r | |
3885 | IN VM_CONTEXT *VmPtr,\r | |
3886 | IN UINT64 Op1,\r | |
3887 | IN UINT64 Op2\r | |
3888 | )\r | |
3889 | {\r | |
3890 | return Op1 ^ Op2;\r | |
3891 | }\r | |
3892 | \r | |
3893 | \r | |
3894 | /**\r | |
3895 | Execute the EBC SHL shift left instruction.\r | |
3896 | \r | |
3897 | Instruction syntax:\r | |
3898 | SHL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3899 | \r | |
3900 | @param VmPtr A pointer to a VM context.\r | |
3901 | @param Op1 Operand 1 from the instruction\r | |
3902 | @param Op2 Operand 2 from the instruction\r | |
3903 | \r | |
3904 | @return Op1 << Op2\r | |
3905 | \r | |
3906 | **/\r | |
3907 | UINT64\r | |
3908 | ExecuteSHL (\r | |
3909 | IN VM_CONTEXT *VmPtr,\r | |
3910 | IN UINT64 Op1,\r | |
3911 | IN UINT64 Op2\r | |
3912 | )\r | |
3913 | {\r | |
3914 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r | |
3915 | return LShiftU64 (Op1, (UINTN)Op2);\r | |
3916 | } else {\r | |
3917 | return (UINT64) ((UINT32) ((UINT32) Op1 << (UINT32) Op2));\r | |
3918 | }\r | |
3919 | }\r | |
3920 | \r | |
3921 | \r | |
3922 | /**\r | |
3923 | Execute the EBC SHR instruction.\r | |
3924 | \r | |
3925 | Instruction syntax:\r | |
3926 | SHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3927 | \r | |
3928 | @param VmPtr A pointer to a VM context.\r | |
3929 | @param Op1 Operand 1 from the instruction\r | |
3930 | @param Op2 Operand 2 from the instruction\r | |
3931 | \r | |
3932 | @return Op1 >> Op2 (unsigned operands)\r | |
3933 | \r | |
3934 | **/\r | |
3935 | UINT64\r | |
3936 | ExecuteSHR (\r | |
3937 | IN VM_CONTEXT *VmPtr,\r | |
3938 | IN UINT64 Op1,\r | |
3939 | IN UINT64 Op2\r | |
3940 | )\r | |
3941 | {\r | |
3942 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r | |
3943 | return RShiftU64 (Op1, (UINTN)Op2);\r | |
3944 | } else {\r | |
3945 | return (UINT64) ((UINT32) Op1 >> (UINT32) Op2);\r | |
3946 | }\r | |
3947 | }\r | |
3948 | \r | |
3949 | \r | |
3950 | /**\r | |
3951 | Execute the EBC ASHR instruction.\r | |
3952 | \r | |
3953 | Instruction syntax:\r | |
3954 | ASHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3955 | \r | |
3956 | @param VmPtr A pointer to a VM context.\r | |
3957 | @param Op1 Operand 1 from the instruction\r | |
3958 | @param Op2 Operand 2 from the instruction\r | |
3959 | \r | |
3960 | @return Op1 >> Op2 (signed)\r | |
3961 | \r | |
3962 | **/\r | |
3963 | UINT64\r | |
3964 | ExecuteASHR (\r | |
3965 | IN VM_CONTEXT *VmPtr,\r | |
3966 | IN UINT64 Op1,\r | |
3967 | IN UINT64 Op2\r | |
3968 | )\r | |
3969 | {\r | |
3970 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r | |
3971 | return ARShiftU64 (Op1, (UINTN)Op2);\r | |
3972 | } else {\r | |
3973 | return (UINT64) ((INT64) ((INT32) Op1 >> (UINT32) Op2));\r | |
3974 | }\r | |
3975 | }\r | |
3976 | \r | |
3977 | \r | |
3978 | /**\r | |
3979 | Execute the EBC EXTNDB instruction to sign-extend a byte value.\r | |
3980 | \r | |
3981 | Instruction syntax:\r | |
3982 | EXTNDB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3983 | \r | |
3984 | @param VmPtr A pointer to a VM context.\r | |
3985 | @param Op1 Operand 1 from the instruction\r | |
3986 | @param Op2 Operand 2 from the instruction\r | |
3987 | \r | |
3988 | @return (INT64)(INT8)Op2\r | |
3989 | \r | |
3990 | **/\r | |
3991 | UINT64\r | |
3992 | ExecuteEXTNDB (\r | |
3993 | IN VM_CONTEXT *VmPtr,\r | |
3994 | IN UINT64 Op1,\r | |
3995 | IN UINT64 Op2\r | |
3996 | )\r | |
3997 | {\r | |
3998 | INT8 Data8;\r | |
3999 | INT64 Data64;\r | |
4000 | //\r | |
4001 | // Convert to byte, then return as 64-bit signed value to let compiler\r | |
4002 | // sign-extend the value\r | |
4003 | //\r | |
4004 | Data8 = (INT8) Op2;\r | |
4005 | Data64 = (INT64) Data8;\r | |
4006 | \r | |
4007 | return (UINT64) Data64;\r | |
4008 | }\r | |
4009 | \r | |
4010 | \r | |
4011 | /**\r | |
4012 | Execute the EBC EXTNDW instruction to sign-extend a 16-bit value.\r | |
4013 | \r | |
4014 | Instruction syntax:\r | |
4015 | EXTNDW[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
4016 | \r | |
4017 | @param VmPtr A pointer to a VM context.\r | |
4018 | @param Op1 Operand 1 from the instruction\r | |
4019 | @param Op2 Operand 2 from the instruction\r | |
4020 | \r | |
4021 | @return (INT64)(INT16)Op2\r | |
4022 | \r | |
4023 | **/\r | |
4024 | UINT64\r | |
4025 | ExecuteEXTNDW (\r | |
4026 | IN VM_CONTEXT *VmPtr,\r | |
4027 | IN UINT64 Op1,\r | |
4028 | IN UINT64 Op2\r | |
4029 | )\r | |
4030 | {\r | |
4031 | INT16 Data16;\r | |
4032 | INT64 Data64;\r | |
4033 | //\r | |
4034 | // Convert to word, then return as 64-bit signed value to let compiler\r | |
4035 | // sign-extend the value\r | |
4036 | //\r | |
4037 | Data16 = (INT16) Op2;\r | |
4038 | Data64 = (INT64) Data16;\r | |
4039 | \r | |
4040 | return (UINT64) Data64;\r | |
4041 | }\r | |
4042 | //\r | |
4043 | // Execute the EBC EXTNDD instruction.\r | |
4044 | //\r | |
4045 | // Format: EXTNDD {@}Rx, {@}Ry [Index16|Immed16]\r | |
4046 | // EXTNDD Dest, Source\r | |
4047 | //\r | |
4048 | // Operation: Dest <- SignExtended((DWORD)Source))\r | |
4049 | //\r | |
4050 | \r | |
4051 | /**\r | |
4052 | Execute the EBC EXTNDD instruction to sign-extend a 32-bit value.\r | |
4053 | \r | |
4054 | Instruction syntax:\r | |
4055 | EXTNDD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
4056 | \r | |
4057 | @param VmPtr A pointer to a VM context.\r | |
4058 | @param Op1 Operand 1 from the instruction\r | |
4059 | @param Op2 Operand 2 from the instruction\r | |
4060 | \r | |
4061 | @return (INT64)(INT32)Op2\r | |
4062 | \r | |
4063 | **/\r | |
4064 | UINT64\r | |
4065 | ExecuteEXTNDD (\r | |
4066 | IN VM_CONTEXT *VmPtr,\r | |
4067 | IN UINT64 Op1,\r | |
4068 | IN UINT64 Op2\r | |
4069 | )\r | |
4070 | {\r | |
4071 | INT32 Data32;\r | |
4072 | INT64 Data64;\r | |
4073 | //\r | |
4074 | // Convert to 32-bit value, then return as 64-bit signed value to let compiler\r | |
4075 | // sign-extend the value\r | |
4076 | //\r | |
4077 | Data32 = (INT32) Op2;\r | |
4078 | Data64 = (INT64) Data32;\r | |
4079 | \r | |
4080 | return (UINT64) Data64;\r | |
4081 | }\r | |
4082 | \r | |
4083 | \r | |
4084 | /**\r | |
4085 | Execute all the EBC signed data manipulation instructions.\r | |
4086 | Since the EBC data manipulation instructions all have the same basic form,\r | |
4087 | they can share the code that does the fetch of operands and the write-back\r | |
4088 | of the result. This function performs the fetch of the operands (even if\r | |
4089 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
4090 | appropriate subfunction, then writes back the returned result.\r | |
4091 | \r | |
4092 | Format:\r | |
4093 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
4094 | \r | |
4095 | @param VmPtr A pointer to VM context.\r | |
4096 | \r | |
4097 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
4098 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4099 | \r | |
4100 | **/\r | |
4101 | EFI_STATUS\r | |
4102 | ExecuteSignedDataManip (\r | |
4103 | IN VM_CONTEXT *VmPtr\r | |
4104 | )\r | |
4105 | {\r | |
4106 | //\r | |
4107 | // Just call the data manipulation function with a flag indicating this\r | |
4108 | // is a signed operation.\r | |
4109 | //\r | |
4110 | return ExecuteDataManip (VmPtr, TRUE);\r | |
4111 | }\r | |
4112 | \r | |
4113 | \r | |
4114 | /**\r | |
4115 | Execute all the EBC unsigned data manipulation instructions.\r | |
4116 | Since the EBC data manipulation instructions all have the same basic form,\r | |
4117 | they can share the code that does the fetch of operands and the write-back\r | |
4118 | of the result. This function performs the fetch of the operands (even if\r | |
4119 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
4120 | appropriate subfunction, then writes back the returned result.\r | |
4121 | \r | |
4122 | Format:\r | |
4123 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
4124 | \r | |
4125 | @param VmPtr A pointer to VM context.\r | |
4126 | \r | |
4127 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
4128 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4129 | \r | |
4130 | **/\r | |
4131 | EFI_STATUS\r | |
4132 | ExecuteUnsignedDataManip (\r | |
4133 | IN VM_CONTEXT *VmPtr\r | |
4134 | )\r | |
4135 | {\r | |
4136 | //\r | |
4137 | // Just call the data manipulation function with a flag indicating this\r | |
4138 | // is not a signed operation.\r | |
4139 | //\r | |
4140 | return ExecuteDataManip (VmPtr, FALSE);\r | |
4141 | }\r | |
4142 | \r | |
4143 | \r | |
4144 | /**\r | |
4145 | Execute all the EBC data manipulation instructions.\r | |
4146 | Since the EBC data manipulation instructions all have the same basic form,\r | |
4147 | they can share the code that does the fetch of operands and the write-back\r | |
4148 | of the result. This function performs the fetch of the operands (even if\r | |
4149 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
4150 | appropriate subfunction, then writes back the returned result.\r | |
4151 | \r | |
4152 | Format:\r | |
4153 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
4154 | \r | |
4155 | @param VmPtr A pointer to VM context.\r | |
4156 | @param IsSignedOp Indicates whether the operand is signed or not.\r | |
4157 | \r | |
4158 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
4159 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4160 | \r | |
4161 | **/\r | |
4162 | EFI_STATUS\r | |
4163 | ExecuteDataManip (\r | |
4164 | IN VM_CONTEXT *VmPtr,\r | |
4165 | IN BOOLEAN IsSignedOp\r | |
4166 | )\r | |
4167 | {\r | |
4168 | UINT8 Opcode;\r | |
4169 | INT16 Index16;\r | |
4170 | UINT8 Operands;\r | |
4171 | UINT8 Size;\r | |
4172 | UINT64 Op1;\r | |
4173 | UINT64 Op2;\r | |
4174 | INTN DataManipDispatchTableIndex;\r | |
4175 | \r | |
4176 | //\r | |
4177 | // Get opcode and operands\r | |
4178 | //\r | |
4179 | Opcode = GETOPCODE (VmPtr);\r | |
4180 | Operands = GETOPERANDS (VmPtr);\r | |
4181 | \r | |
4182 | //\r | |
4183 | // Determine if we have immediate data by the opcode\r | |
4184 | //\r | |
4185 | if ((Opcode & DATAMANIP_M_IMMDATA) != 0) {\r | |
4186 | //\r | |
4187 | // Index16 if Ry is indirect, or Immed16 if Ry direct.\r | |
4188 | //\r | |
4189 | if (OPERAND2_INDIRECT (Operands)) {\r | |
4190 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
4191 | } else {\r | |
4192 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
4193 | }\r | |
4194 | \r | |
4195 | Size = 4;\r | |
4196 | } else {\r | |
4197 | Index16 = 0;\r | |
4198 | Size = 2;\r | |
4199 | }\r | |
4200 | //\r | |
4201 | // Now get operand2 (source). It's of format {@}R2 {Index16|Immed16}\r | |
4202 | //\r | |
4203 | Op2 = (UINT64) VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index16;\r | |
4204 | if (OPERAND2_INDIRECT (Operands)) {\r | |
4205 | //\r | |
4206 | // Indirect form: @R2 Index16. Fetch as 32- or 64-bit data\r | |
4207 | //\r | |
4208 | if ((Opcode & DATAMANIP_M_64) != 0) {\r | |
4209 | Op2 = VmReadMem64 (VmPtr, (UINTN) Op2);\r | |
4210 | } else {\r | |
4211 | //\r | |
4212 | // Read as signed value where appropriate.\r | |
4213 | //\r | |
4214 | if (IsSignedOp) {\r | |
4215 | Op2 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op2));\r | |
4216 | } else {\r | |
4217 | Op2 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op2);\r | |
4218 | }\r | |
4219 | }\r | |
4220 | } else {\r | |
4221 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
4222 | if (IsSignedOp) {\r | |
4223 | Op2 = (UINT64) (INT64) ((INT32) Op2);\r | |
4224 | } else {\r | |
4225 | Op2 = (UINT64) ((UINT32) Op2);\r | |
4226 | }\r | |
4227 | }\r | |
4228 | }\r | |
4229 | //\r | |
4230 | // Get operand1 (destination and sometimes also an actual operand)\r | |
4231 | // of form {@}R1\r | |
4232 | //\r | |
4233 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r | |
4234 | if (OPERAND1_INDIRECT (Operands)) {\r | |
4235 | if ((Opcode & DATAMANIP_M_64) != 0) {\r | |
4236 | Op1 = VmReadMem64 (VmPtr, (UINTN) Op1);\r | |
4237 | } else {\r | |
4238 | if (IsSignedOp) {\r | |
4239 | Op1 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op1));\r | |
4240 | } else {\r | |
4241 | Op1 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op1);\r | |
4242 | }\r | |
4243 | }\r | |
4244 | } else {\r | |
4245 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
4246 | if (IsSignedOp) {\r | |
4247 | Op1 = (UINT64) (INT64) ((INT32) Op1);\r | |
4248 | } else {\r | |
4249 | Op1 = (UINT64) ((UINT32) Op1);\r | |
4250 | }\r | |
4251 | }\r | |
4252 | }\r | |
4253 | //\r | |
4254 | // Dispatch to the computation function\r | |
4255 | //\r | |
4256 | DataManipDispatchTableIndex = (Opcode & OPCODE_M_OPCODE) - OPCODE_NOT;\r | |
4257 | if ((DataManipDispatchTableIndex < 0) ||\r | |
4258 | (DataManipDispatchTableIndex >= ARRAY_SIZE (mDataManipDispatchTable))) {\r | |
4259 | EbcDebugSignalException (\r | |
4260 | EXCEPT_EBC_INVALID_OPCODE,\r | |
4261 | EXCEPTION_FLAG_ERROR,\r | |
4262 | VmPtr\r | |
4263 | );\r | |
4264 | //\r | |
4265 | // Advance and return\r | |
4266 | //\r | |
4267 | VmPtr->Ip += Size;\r | |
4268 | return EFI_UNSUPPORTED;\r | |
4269 | } else {\r | |
4270 | Op2 = mDataManipDispatchTable[DataManipDispatchTableIndex](VmPtr, Op1, Op2);\r | |
4271 | }\r | |
4272 | //\r | |
4273 | // Write back the result.\r | |
4274 | //\r | |
4275 | if (OPERAND1_INDIRECT (Operands)) {\r | |
4276 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r | |
4277 | if ((Opcode & DATAMANIP_M_64) != 0) {\r | |
4278 | VmWriteMem64 (VmPtr, (UINTN) Op1, Op2);\r | |
4279 | } else {\r | |
4280 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) Op2);\r | |
4281 | }\r | |
4282 | } else {\r | |
4283 | //\r | |
4284 | // Storage back to a register. Write back, clearing upper bits (as per\r | |
4285 | // the specification) if 32-bit operation.\r | |
4286 | //\r | |
4287 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Op2;\r | |
4288 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
4289 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] &= 0xFFFFFFFF;\r | |
4290 | }\r | |
4291 | }\r | |
4292 | //\r | |
4293 | // Advance the instruction pointer\r | |
4294 | //\r | |
4295 | VmPtr->Ip += Size;\r | |
4296 | return EFI_SUCCESS;\r | |
4297 | }\r | |
4298 | \r | |
4299 | \r | |
4300 | /**\r | |
4301 | Execute the EBC LOADSP instruction.\r | |
4302 | \r | |
4303 | Instruction syntax:\r | |
4304 | LOADSP SP1, R2\r | |
4305 | \r | |
4306 | @param VmPtr A pointer to a VM context.\r | |
4307 | \r | |
4308 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
4309 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4310 | \r | |
4311 | **/\r | |
4312 | EFI_STATUS\r | |
4313 | ExecuteLOADSP (\r | |
4314 | IN VM_CONTEXT *VmPtr\r | |
4315 | )\r | |
4316 | {\r | |
4317 | UINT8 Operands;\r | |
4318 | \r | |
4319 | //\r | |
4320 | // Get the operands\r | |
4321 | //\r | |
4322 | Operands = GETOPERANDS (VmPtr);\r | |
4323 | \r | |
4324 | //\r | |
4325 | // Do the operation\r | |
4326 | //\r | |
4327 | switch (OPERAND1_REGNUM (Operands)) {\r | |
4328 | //\r | |
4329 | // Set flags\r | |
4330 | //\r | |
4331 | case 0:\r | |
4332 | //\r | |
4333 | // Spec states that this instruction will not modify reserved bits in\r | |
4334 | // the flags register.\r | |
4335 | //\r | |
4336 | VmPtr->Flags = (VmPtr->Flags &~VMFLAGS_ALL_VALID) | (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] & VMFLAGS_ALL_VALID);\r | |
4337 | break;\r | |
4338 | \r | |
4339 | default:\r | |
4340 | EbcDebugSignalException (\r | |
4341 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
4342 | EXCEPTION_FLAG_WARNING,\r | |
4343 | VmPtr\r | |
4344 | );\r | |
4345 | VmPtr->Ip += 2;\r | |
4346 | return EFI_UNSUPPORTED;\r | |
4347 | }\r | |
4348 | \r | |
4349 | VmPtr->Ip += 2;\r | |
4350 | return EFI_SUCCESS;\r | |
4351 | }\r | |
4352 | \r | |
4353 | \r | |
4354 | /**\r | |
4355 | Execute the EBC STORESP instruction.\r | |
4356 | \r | |
4357 | Instruction syntax:\r | |
4358 | STORESP Rx, FLAGS|IP\r | |
4359 | \r | |
4360 | @param VmPtr A pointer to a VM context.\r | |
4361 | \r | |
4362 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
4363 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4364 | \r | |
4365 | **/\r | |
4366 | EFI_STATUS\r | |
4367 | ExecuteSTORESP (\r | |
4368 | IN VM_CONTEXT *VmPtr\r | |
4369 | )\r | |
4370 | {\r | |
4371 | UINT8 Operands;\r | |
4372 | \r | |
4373 | //\r | |
4374 | // Get the operands\r | |
4375 | //\r | |
4376 | Operands = GETOPERANDS (VmPtr);\r | |
4377 | \r | |
4378 | //\r | |
4379 | // Do the operation\r | |
4380 | //\r | |
4381 | switch (OPERAND2_REGNUM (Operands)) {\r | |
4382 | //\r | |
4383 | // Get flags\r | |
4384 | //\r | |
4385 | case 0:\r | |
4386 | //\r | |
4387 | // Retrieve the value in the flags register, then clear reserved bits\r | |
4388 | //\r | |
4389 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (UINT64) (VmPtr->Flags & VMFLAGS_ALL_VALID);\r | |
4390 | break;\r | |
4391 | \r | |
4392 | //\r | |
4393 | // Get IP -- address of following instruction\r | |
4394 | //\r | |
4395 | case 1:\r | |
4396 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (UINT64) (UINTN) VmPtr->Ip + 2;\r | |
4397 | break;\r | |
4398 | \r | |
4399 | default:\r | |
4400 | EbcDebugSignalException (\r | |
4401 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
4402 | EXCEPTION_FLAG_WARNING,\r | |
4403 | VmPtr\r | |
4404 | );\r | |
4405 | VmPtr->Ip += 2;\r | |
4406 | return EFI_UNSUPPORTED;\r | |
4407 | break;\r | |
4408 | }\r | |
4409 | \r | |
4410 | VmPtr->Ip += 2;\r | |
4411 | return EFI_SUCCESS;\r | |
4412 | }\r | |
4413 | \r | |
4414 | \r | |
4415 | /**\r | |
4416 | Decode a 16-bit index to determine the offset. Given an index value:\r | |
4417 | \r | |
4418 | b15 - sign bit\r | |
4419 | b14:12 - number of bits in this index assigned to natural units (=a)\r | |
4420 | ba:11 - constant units = ConstUnits\r | |
4421 | b0:a - natural units = NaturalUnits\r | |
4422 | \r | |
4423 | Given this info, the offset can be computed by:\r | |
4424 | offset = sign_bit * (ConstUnits + NaturalUnits * sizeof(UINTN))\r | |
4425 | \r | |
4426 | Max offset is achieved with index = 0x7FFF giving an offset of\r | |
4427 | 0x27B (32-bit machine) or 0x477 (64-bit machine).\r | |
4428 | Min offset is achieved with index =\r | |
4429 | \r | |
4430 | @param VmPtr A pointer to VM context.\r | |
4431 | @param CodeOffset Offset from IP of the location of the 16-bit index\r | |
4432 | to decode.\r | |
4433 | \r | |
4434 | @return The decoded offset.\r | |
4435 | \r | |
4436 | **/\r | |
4437 | INT16\r | |
4438 | VmReadIndex16 (\r | |
4439 | IN VM_CONTEXT *VmPtr,\r | |
4440 | IN UINT32 CodeOffset\r | |
4441 | )\r | |
4442 | {\r | |
4443 | UINT16 Index;\r | |
4444 | INT16 Offset;\r | |
4445 | INT16 ConstUnits;\r | |
4446 | INT16 NaturalUnits;\r | |
4447 | INT16 NBits;\r | |
4448 | INT16 Mask;\r | |
4449 | \r | |
4450 | //\r | |
4451 | // First read the index from the code stream\r | |
4452 | //\r | |
4453 | Index = VmReadCode16 (VmPtr, CodeOffset);\r | |
4454 | \r | |
4455 | //\r | |
4456 | // Get the mask for NaturalUnits. First get the number of bits from the index.\r | |
4457 | //\r | |
4458 | NBits = (INT16) ((Index & 0x7000) >> 12);\r | |
4459 | \r | |
4460 | //\r | |
4461 | // Scale it for 16-bit indexes\r | |
4462 | //\r | |
4463 | NBits *= 2;\r | |
4464 | \r | |
4465 | //\r | |
4466 | // Now using the number of bits, create a mask.\r | |
4467 | //\r | |
4468 | Mask = (INT16) ((INT16)~0 << NBits);\r | |
4469 | \r | |
4470 | //\r | |
4471 | // Now using the mask, extract NaturalUnits from the lower bits of the index.\r | |
4472 | //\r | |
4473 | NaturalUnits = (INT16) (Index &~Mask);\r | |
4474 | \r | |
4475 | //\r | |
4476 | // Now compute ConstUnits\r | |
4477 | //\r | |
4478 | ConstUnits = (INT16) (((Index &~0xF000) & Mask) >> NBits);\r | |
4479 | \r | |
4480 | Offset = (INT16) (NaturalUnits * sizeof (UINTN) + ConstUnits);\r | |
4481 | \r | |
4482 | //\r | |
4483 | // Now set the sign\r | |
4484 | //\r | |
4485 | if ((Index & 0x8000) != 0) {\r | |
4486 | //\r | |
4487 | // Do it the hard way to work around a bogus compiler warning\r | |
4488 | //\r | |
4489 | // Offset = -1 * Offset;\r | |
4490 | //\r | |
4491 | Offset = (INT16) ((INT32) Offset * -1);\r | |
4492 | }\r | |
4493 | \r | |
4494 | return Offset;\r | |
4495 | }\r | |
4496 | \r | |
4497 | \r | |
4498 | /**\r | |
4499 | Decode a 32-bit index to determine the offset.\r | |
4500 | \r | |
4501 | @param VmPtr A pointer to VM context.\r | |
4502 | @param CodeOffset Offset from IP of the location of the 32-bit index\r | |
4503 | to decode.\r | |
4504 | \r | |
4505 | @return Converted index per EBC VM specification.\r | |
4506 | \r | |
4507 | **/\r | |
4508 | INT32\r | |
4509 | VmReadIndex32 (\r | |
4510 | IN VM_CONTEXT *VmPtr,\r | |
4511 | IN UINT32 CodeOffset\r | |
4512 | )\r | |
4513 | {\r | |
4514 | UINT32 Index;\r | |
4515 | INT32 Offset;\r | |
4516 | INT32 ConstUnits;\r | |
4517 | INT32 NaturalUnits;\r | |
4518 | INT32 NBits;\r | |
4519 | INT32 Mask;\r | |
4520 | \r | |
4521 | Index = VmReadImmed32 (VmPtr, CodeOffset);\r | |
4522 | \r | |
4523 | //\r | |
4524 | // Get the mask for NaturalUnits. First get the number of bits from the index.\r | |
4525 | //\r | |
4526 | NBits = (Index & 0x70000000) >> 28;\r | |
4527 | \r | |
4528 | //\r | |
4529 | // Scale it for 32-bit indexes\r | |
4530 | //\r | |
4531 | NBits *= 4;\r | |
4532 | \r | |
4533 | //\r | |
4534 | // Now using the number of bits, create a mask.\r | |
4535 | //\r | |
4536 | Mask = (INT32)~0 << NBits;\r | |
4537 | \r | |
4538 | //\r | |
4539 | // Now using the mask, extract NaturalUnits from the lower bits of the index.\r | |
4540 | //\r | |
4541 | NaturalUnits = Index &~Mask;\r | |
4542 | \r | |
4543 | //\r | |
4544 | // Now compute ConstUnits\r | |
4545 | //\r | |
4546 | ConstUnits = ((Index &~0xF0000000) & Mask) >> NBits;\r | |
4547 | \r | |
4548 | Offset = NaturalUnits * sizeof (UINTN) + ConstUnits;\r | |
4549 | \r | |
4550 | //\r | |
4551 | // Now set the sign\r | |
4552 | //\r | |
4553 | if ((Index & 0x80000000) != 0) {\r | |
4554 | Offset = Offset * -1;\r | |
4555 | }\r | |
4556 | \r | |
4557 | return Offset;\r | |
4558 | }\r | |
4559 | \r | |
4560 | \r | |
4561 | /**\r | |
4562 | Decode a 64-bit index to determine the offset.\r | |
4563 | \r | |
4564 | @param VmPtr A pointer to VM context.s\r | |
4565 | @param CodeOffset Offset from IP of the location of the 64-bit index\r | |
4566 | to decode.\r | |
4567 | \r | |
4568 | @return Converted index per EBC VM specification\r | |
4569 | \r | |
4570 | **/\r | |
4571 | INT64\r | |
4572 | VmReadIndex64 (\r | |
4573 | IN VM_CONTEXT *VmPtr,\r | |
4574 | IN UINT32 CodeOffset\r | |
4575 | )\r | |
4576 | {\r | |
4577 | UINT64 Index;\r | |
4578 | INT64 Offset;\r | |
4579 | INT64 ConstUnits;\r | |
4580 | INT64 NaturalUnits;\r | |
4581 | INT64 NBits;\r | |
4582 | INT64 Mask;\r | |
4583 | \r | |
4584 | Index = VmReadCode64 (VmPtr, CodeOffset);\r | |
4585 | \r | |
4586 | //\r | |
4587 | // Get the mask for NaturalUnits. First get the number of bits from the index.\r | |
4588 | //\r | |
4589 | NBits = RShiftU64 ((Index & 0x7000000000000000ULL), 60);\r | |
4590 | \r | |
4591 | //\r | |
4592 | // Scale it for 64-bit indexes (multiply by 8 by shifting left 3)\r | |
4593 | //\r | |
4594 | NBits = LShiftU64 ((UINT64)NBits, 3);\r | |
4595 | \r | |
4596 | //\r | |
4597 | // Now using the number of bits, create a mask.\r | |
4598 | //\r | |
4599 | Mask = (LShiftU64 ((UINT64)~0, (UINTN)NBits));\r | |
4600 | \r | |
4601 | //\r | |
4602 | // Now using the mask, extract NaturalUnits from the lower bits of the index.\r | |
4603 | //\r | |
4604 | NaturalUnits = Index &~Mask;\r | |
4605 | \r | |
4606 | //\r | |
4607 | // Now compute ConstUnits\r | |
4608 | //\r | |
4609 | ConstUnits = ARShiftU64 (((Index &~0xF000000000000000ULL) & Mask), (UINTN)NBits);\r | |
4610 | \r | |
4611 | Offset = MultU64x64 ((UINT64) NaturalUnits, sizeof (UINTN)) + ConstUnits;\r | |
4612 | \r | |
4613 | //\r | |
4614 | // Now set the sign\r | |
4615 | //\r | |
4616 | if ((Index & 0x8000000000000000ULL) != 0) {\r | |
4617 | Offset = MultS64x64 (Offset, -1);\r | |
4618 | }\r | |
4619 | \r | |
4620 | return Offset;\r | |
4621 | }\r | |
4622 | \r | |
4623 | \r | |
4624 | /**\r | |
4625 | Writes 8-bit data to memory address.\r | |
4626 | \r | |
4627 | This routine is called by the EBC data\r | |
4628 | movement instructions that write to memory. Since these writes\r | |
4629 | may be to the stack, which looks like (high address on top) this,\r | |
4630 | \r | |
4631 | [EBC entry point arguments]\r | |
4632 | [VM stack]\r | |
4633 | [EBC stack]\r | |
4634 | \r | |
4635 | we need to detect all attempts to write to the EBC entry point argument\r | |
4636 | stack area and adjust the address (which will initially point into the\r | |
4637 | VM stack) to point into the EBC entry point arguments.\r | |
4638 | \r | |
4639 | @param VmPtr A pointer to a VM context.\r | |
4640 | @param Addr Address to write to.\r | |
4641 | @param Data Value to write to Addr.\r | |
4642 | \r | |
4643 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4644 | @retval Other Some error occurs when writing data to the address.\r | |
4645 | \r | |
4646 | **/\r | |
4647 | EFI_STATUS\r | |
4648 | VmWriteMem8 (\r | |
4649 | IN VM_CONTEXT *VmPtr,\r | |
4650 | IN UINTN Addr,\r | |
4651 | IN UINT8 Data\r | |
4652 | )\r | |
4653 | {\r | |
4654 | //\r | |
4655 | // Convert the address if it's in the stack gap\r | |
4656 | //\r | |
4657 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4658 | *(UINT8 *) Addr = Data;\r | |
4659 | return EFI_SUCCESS;\r | |
4660 | }\r | |
4661 | \r | |
4662 | /**\r | |
4663 | Writes 16-bit data to memory address.\r | |
4664 | \r | |
4665 | This routine is called by the EBC data\r | |
4666 | movement instructions that write to memory. Since these writes\r | |
4667 | may be to the stack, which looks like (high address on top) this,\r | |
4668 | \r | |
4669 | [EBC entry point arguments]\r | |
4670 | [VM stack]\r | |
4671 | [EBC stack]\r | |
4672 | \r | |
4673 | we need to detect all attempts to write to the EBC entry point argument\r | |
4674 | stack area and adjust the address (which will initially point into the\r | |
4675 | VM stack) to point into the EBC entry point arguments.\r | |
4676 | \r | |
4677 | @param VmPtr A pointer to a VM context.\r | |
4678 | @param Addr Address to write to.\r | |
4679 | @param Data Value to write to Addr.\r | |
4680 | \r | |
4681 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4682 | @retval Other Some error occurs when writing data to the address.\r | |
4683 | \r | |
4684 | **/\r | |
4685 | EFI_STATUS\r | |
4686 | VmWriteMem16 (\r | |
4687 | IN VM_CONTEXT *VmPtr,\r | |
4688 | IN UINTN Addr,\r | |
4689 | IN UINT16 Data\r | |
4690 | )\r | |
4691 | {\r | |
4692 | EFI_STATUS Status;\r | |
4693 | \r | |
4694 | //\r | |
4695 | // Convert the address if it's in the stack gap\r | |
4696 | //\r | |
4697 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4698 | \r | |
4699 | //\r | |
4700 | // Do a simple write if aligned\r | |
4701 | //\r | |
4702 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
4703 | *(UINT16 *) Addr = Data;\r | |
4704 | } else {\r | |
4705 | //\r | |
4706 | // Write as two bytes\r | |
4707 | //\r | |
4708 | MemoryFence ();\r | |
4709 | if ((Status = VmWriteMem8 (VmPtr, Addr, (UINT8) Data)) != EFI_SUCCESS) {\r | |
4710 | return Status;\r | |
4711 | }\r | |
4712 | \r | |
4713 | MemoryFence ();\r | |
4714 | if ((Status = VmWriteMem8 (VmPtr, Addr + 1, (UINT8) (Data >> 8))) != EFI_SUCCESS) {\r | |
4715 | return Status;\r | |
4716 | }\r | |
4717 | \r | |
4718 | MemoryFence ();\r | |
4719 | }\r | |
4720 | \r | |
4721 | return EFI_SUCCESS;\r | |
4722 | }\r | |
4723 | \r | |
4724 | \r | |
4725 | /**\r | |
4726 | Writes 32-bit data to memory address.\r | |
4727 | \r | |
4728 | This routine is called by the EBC data\r | |
4729 | movement instructions that write to memory. Since these writes\r | |
4730 | may be to the stack, which looks like (high address on top) this,\r | |
4731 | \r | |
4732 | [EBC entry point arguments]\r | |
4733 | [VM stack]\r | |
4734 | [EBC stack]\r | |
4735 | \r | |
4736 | we need to detect all attempts to write to the EBC entry point argument\r | |
4737 | stack area and adjust the address (which will initially point into the\r | |
4738 | VM stack) to point into the EBC entry point arguments.\r | |
4739 | \r | |
4740 | @param VmPtr A pointer to a VM context.\r | |
4741 | @param Addr Address to write to.\r | |
4742 | @param Data Value to write to Addr.\r | |
4743 | \r | |
4744 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4745 | @retval Other Some error occurs when writing data to the address.\r | |
4746 | \r | |
4747 | **/\r | |
4748 | EFI_STATUS\r | |
4749 | VmWriteMem32 (\r | |
4750 | IN VM_CONTEXT *VmPtr,\r | |
4751 | IN UINTN Addr,\r | |
4752 | IN UINT32 Data\r | |
4753 | )\r | |
4754 | {\r | |
4755 | EFI_STATUS Status;\r | |
4756 | \r | |
4757 | //\r | |
4758 | // Convert the address if it's in the stack gap\r | |
4759 | //\r | |
4760 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4761 | \r | |
4762 | //\r | |
4763 | // Do a simple write if aligned\r | |
4764 | //\r | |
4765 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
4766 | *(UINT32 *) Addr = Data;\r | |
4767 | } else {\r | |
4768 | //\r | |
4769 | // Write as two words\r | |
4770 | //\r | |
4771 | MemoryFence ();\r | |
4772 | if ((Status = VmWriteMem16 (VmPtr, Addr, (UINT16) Data)) != EFI_SUCCESS) {\r | |
4773 | return Status;\r | |
4774 | }\r | |
4775 | \r | |
4776 | MemoryFence ();\r | |
4777 | if ((Status = VmWriteMem16 (VmPtr, Addr + sizeof (UINT16), (UINT16) (Data >> 16))) != EFI_SUCCESS) {\r | |
4778 | return Status;\r | |
4779 | }\r | |
4780 | \r | |
4781 | MemoryFence ();\r | |
4782 | }\r | |
4783 | \r | |
4784 | return EFI_SUCCESS;\r | |
4785 | }\r | |
4786 | \r | |
4787 | \r | |
4788 | /**\r | |
4789 | Writes 64-bit data to memory address.\r | |
4790 | \r | |
4791 | This routine is called by the EBC data\r | |
4792 | movement instructions that write to memory. Since these writes\r | |
4793 | may be to the stack, which looks like (high address on top) this,\r | |
4794 | \r | |
4795 | [EBC entry point arguments]\r | |
4796 | [VM stack]\r | |
4797 | [EBC stack]\r | |
4798 | \r | |
4799 | we need to detect all attempts to write to the EBC entry point argument\r | |
4800 | stack area and adjust the address (which will initially point into the\r | |
4801 | VM stack) to point into the EBC entry point arguments.\r | |
4802 | \r | |
4803 | @param VmPtr A pointer to a VM context.\r | |
4804 | @param Addr Address to write to.\r | |
4805 | @param Data Value to write to Addr.\r | |
4806 | \r | |
4807 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4808 | @retval Other Some error occurs when writing data to the address.\r | |
4809 | \r | |
4810 | **/\r | |
4811 | EFI_STATUS\r | |
4812 | VmWriteMem64 (\r | |
4813 | IN VM_CONTEXT *VmPtr,\r | |
4814 | IN UINTN Addr,\r | |
4815 | IN UINT64 Data\r | |
4816 | )\r | |
4817 | {\r | |
4818 | EFI_STATUS Status;\r | |
4819 | \r | |
4820 | //\r | |
4821 | // Convert the address if it's in the stack gap\r | |
4822 | //\r | |
4823 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4824 | \r | |
4825 | //\r | |
4826 | // Do a simple write if aligned\r | |
4827 | //\r | |
4828 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
4829 | *(UINT64 *) Addr = Data;\r | |
4830 | } else {\r | |
4831 | //\r | |
4832 | // Write as two 32-bit words\r | |
4833 | //\r | |
4834 | MemoryFence ();\r | |
4835 | if ((Status = VmWriteMem32 (VmPtr, Addr, (UINT32) Data)) != EFI_SUCCESS) {\r | |
4836 | return Status;\r | |
4837 | }\r | |
4838 | \r | |
4839 | MemoryFence ();\r | |
4840 | if ((Status = VmWriteMem32 (VmPtr, Addr + sizeof (UINT32), (UINT32) RShiftU64(Data, 32))) != EFI_SUCCESS) {\r | |
4841 | return Status;\r | |
4842 | }\r | |
4843 | \r | |
4844 | MemoryFence ();\r | |
4845 | }\r | |
4846 | \r | |
4847 | return EFI_SUCCESS;\r | |
4848 | }\r | |
4849 | \r | |
4850 | \r | |
4851 | /**\r | |
4852 | Writes UINTN data to memory address.\r | |
4853 | \r | |
4854 | This routine is called by the EBC data\r | |
4855 | movement instructions that write to memory. Since these writes\r | |
4856 | may be to the stack, which looks like (high address on top) this,\r | |
4857 | \r | |
4858 | [EBC entry point arguments]\r | |
4859 | [VM stack]\r | |
4860 | [EBC stack]\r | |
4861 | \r | |
4862 | we need to detect all attempts to write to the EBC entry point argument\r | |
4863 | stack area and adjust the address (which will initially point into the\r | |
4864 | VM stack) to point into the EBC entry point arguments.\r | |
4865 | \r | |
4866 | @param VmPtr A pointer to a VM context.\r | |
4867 | @param Addr Address to write to.\r | |
4868 | @param Data Value to write to Addr.\r | |
4869 | \r | |
4870 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
4871 | @retval Other Some error occurs when writing data to the address.\r | |
4872 | \r | |
4873 | **/\r | |
4874 | EFI_STATUS\r | |
4875 | VmWriteMemN (\r | |
4876 | IN VM_CONTEXT *VmPtr,\r | |
4877 | IN UINTN Addr,\r | |
4878 | IN UINTN Data\r | |
4879 | )\r | |
4880 | {\r | |
4881 | EFI_STATUS Status;\r | |
4882 | UINTN Index;\r | |
4883 | \r | |
4884 | Status = EFI_SUCCESS;\r | |
4885 | \r | |
4886 | //\r | |
4887 | // Convert the address if it's in the stack gap\r | |
4888 | //\r | |
4889 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4890 | \r | |
4891 | //\r | |
4892 | // Do a simple write if aligned\r | |
4893 | //\r | |
4894 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
4895 | *(UINTN *) Addr = Data;\r | |
4896 | } else {\r | |
4897 | for (Index = 0; Index < sizeof (UINTN) / sizeof (UINT32); Index++) {\r | |
4898 | MemoryFence ();\r | |
4899 | Status = VmWriteMem32 (VmPtr, Addr + Index * sizeof (UINT32), (UINT32) Data);\r | |
4900 | MemoryFence ();\r | |
4901 | Data = (UINTN) RShiftU64 ((UINT64)Data, 32);\r | |
4902 | }\r | |
4903 | }\r | |
4904 | \r | |
4905 | return Status;\r | |
4906 | }\r | |
4907 | \r | |
4908 | \r | |
4909 | /**\r | |
4910 | Reads 8-bit immediate value at the offset.\r | |
4911 | \r | |
4912 | This routine is called by the EBC execute\r | |
4913 | functions to read EBC immediate values from the code stream.\r | |
4914 | Since we can't assume alignment, each tries to read in the biggest\r | |
4915 | chunks size available, but will revert to smaller reads if necessary.\r | |
4916 | \r | |
4917 | @param VmPtr A pointer to a VM context.\r | |
4918 | @param Offset offset from IP of the code bytes to read.\r | |
4919 | \r | |
4920 | @return Signed data of the requested size from the specified address.\r | |
4921 | \r | |
4922 | **/\r | |
4923 | INT8\r | |
4924 | VmReadImmed8 (\r | |
4925 | IN VM_CONTEXT *VmPtr,\r | |
4926 | IN UINT32 Offset\r | |
4927 | )\r | |
4928 | {\r | |
4929 | //\r | |
4930 | // Simply return the data in flat memory space\r | |
4931 | //\r | |
4932 | return * (INT8 *) (VmPtr->Ip + Offset);\r | |
4933 | }\r | |
4934 | \r | |
4935 | /**\r | |
4936 | Reads 16-bit immediate value at the offset.\r | |
4937 | \r | |
4938 | This routine is called by the EBC execute\r | |
4939 | functions to read EBC immediate values from the code stream.\r | |
4940 | Since we can't assume alignment, each tries to read in the biggest\r | |
4941 | chunks size available, but will revert to smaller reads if necessary.\r | |
4942 | \r | |
4943 | @param VmPtr A pointer to a VM context.\r | |
4944 | @param Offset offset from IP of the code bytes to read.\r | |
4945 | \r | |
4946 | @return Signed data of the requested size from the specified address.\r | |
4947 | \r | |
4948 | **/\r | |
4949 | INT16\r | |
4950 | VmReadImmed16 (\r | |
4951 | IN VM_CONTEXT *VmPtr,\r | |
4952 | IN UINT32 Offset\r | |
4953 | )\r | |
4954 | {\r | |
4955 | //\r | |
4956 | // Read direct if aligned\r | |
4957 | //\r | |
4958 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (INT16))) {\r | |
4959 | return * (INT16 *) (VmPtr->Ip + Offset);\r | |
4960 | } else {\r | |
4961 | //\r | |
4962 | // All code word reads should be aligned\r | |
4963 | //\r | |
4964 | EbcDebugSignalException (\r | |
4965 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
4966 | EXCEPTION_FLAG_WARNING,\r | |
4967 | VmPtr\r | |
4968 | );\r | |
4969 | }\r | |
4970 | //\r | |
4971 | // Return unaligned data\r | |
4972 | //\r | |
4973 | return (INT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
4974 | }\r | |
4975 | \r | |
4976 | \r | |
4977 | /**\r | |
4978 | Reads 32-bit immediate value at the offset.\r | |
4979 | \r | |
4980 | This routine is called by the EBC execute\r | |
4981 | functions to read EBC immediate values from the code stream.\r | |
4982 | Since we can't assume alignment, each tries to read in the biggest\r | |
4983 | chunks size available, but will revert to smaller reads if necessary.\r | |
4984 | \r | |
4985 | @param VmPtr A pointer to a VM context.\r | |
4986 | @param Offset offset from IP of the code bytes to read.\r | |
4987 | \r | |
4988 | @return Signed data of the requested size from the specified address.\r | |
4989 | \r | |
4990 | **/\r | |
4991 | INT32\r | |
4992 | VmReadImmed32 (\r | |
4993 | IN VM_CONTEXT *VmPtr,\r | |
4994 | IN UINT32 Offset\r | |
4995 | )\r | |
4996 | {\r | |
4997 | UINT32 Data;\r | |
4998 | \r | |
4999 | //\r | |
5000 | // Read direct if aligned\r | |
5001 | //\r | |
5002 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
5003 | return * (INT32 *) (VmPtr->Ip + Offset);\r | |
5004 | }\r | |
5005 | //\r | |
5006 | // Return unaligned data\r | |
5007 | //\r | |
5008 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
5009 | Data |= (UINT32)(VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
5010 | return Data;\r | |
5011 | }\r | |
5012 | \r | |
5013 | \r | |
5014 | /**\r | |
5015 | Reads 64-bit immediate value at the offset.\r | |
5016 | \r | |
5017 | This routine is called by the EBC execute\r | |
5018 | functions to read EBC immediate values from the code stream.\r | |
5019 | Since we can't assume alignment, each tries to read in the biggest\r | |
5020 | chunks size available, but will revert to smaller reads if necessary.\r | |
5021 | \r | |
5022 | @param VmPtr A pointer to a VM context.\r | |
5023 | @param Offset offset from IP of the code bytes to read.\r | |
5024 | \r | |
5025 | @return Signed data of the requested size from the specified address.\r | |
5026 | \r | |
5027 | **/\r | |
5028 | INT64\r | |
5029 | VmReadImmed64 (\r | |
5030 | IN VM_CONTEXT *VmPtr,\r | |
5031 | IN UINT32 Offset\r | |
5032 | )\r | |
5033 | {\r | |
5034 | UINT64 Data64;\r | |
5035 | UINT32 Data32;\r | |
5036 | UINT8 *Ptr;\r | |
5037 | \r | |
5038 | //\r | |
5039 | // Read direct if aligned\r | |
5040 | //\r | |
5041 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
5042 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
5043 | }\r | |
5044 | //\r | |
5045 | // Return unaligned data.\r | |
5046 | //\r | |
5047 | Ptr = (UINT8 *) &Data64;\r | |
5048 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
5049 | *(UINT32 *) Ptr = Data32;\r | |
5050 | Ptr += sizeof (Data32);\r | |
5051 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r | |
5052 | *(UINT32 *) Ptr = Data32;\r | |
5053 | return Data64;\r | |
5054 | }\r | |
5055 | \r | |
5056 | \r | |
5057 | /**\r | |
5058 | Reads 16-bit unsigned data from the code stream.\r | |
5059 | \r | |
5060 | This routine provides the ability to read raw unsigned data from the code\r | |
5061 | stream.\r | |
5062 | \r | |
5063 | @param VmPtr A pointer to VM context\r | |
5064 | @param Offset Offset from current IP to the raw data to read.\r | |
5065 | \r | |
5066 | @return The raw unsigned 16-bit value from the code stream.\r | |
5067 | \r | |
5068 | **/\r | |
5069 | UINT16\r | |
5070 | VmReadCode16 (\r | |
5071 | IN VM_CONTEXT *VmPtr,\r | |
5072 | IN UINT32 Offset\r | |
5073 | )\r | |
5074 | {\r | |
5075 | //\r | |
5076 | // Read direct if aligned\r | |
5077 | //\r | |
5078 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT16))) {\r | |
5079 | return * (UINT16 *) (VmPtr->Ip + Offset);\r | |
5080 | } else {\r | |
5081 | //\r | |
5082 | // All code word reads should be aligned\r | |
5083 | //\r | |
5084 | EbcDebugSignalException (\r | |
5085 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
5086 | EXCEPTION_FLAG_WARNING,\r | |
5087 | VmPtr\r | |
5088 | );\r | |
5089 | }\r | |
5090 | //\r | |
5091 | // Return unaligned data\r | |
5092 | //\r | |
5093 | return (UINT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
5094 | }\r | |
5095 | \r | |
5096 | \r | |
5097 | /**\r | |
5098 | Reads 32-bit unsigned data from the code stream.\r | |
5099 | \r | |
5100 | This routine provides the ability to read raw unsigned data from the code\r | |
5101 | stream.\r | |
5102 | \r | |
5103 | @param VmPtr A pointer to VM context\r | |
5104 | @param Offset Offset from current IP to the raw data to read.\r | |
5105 | \r | |
5106 | @return The raw unsigned 32-bit value from the code stream.\r | |
5107 | \r | |
5108 | **/\r | |
5109 | UINT32\r | |
5110 | VmReadCode32 (\r | |
5111 | IN VM_CONTEXT *VmPtr,\r | |
5112 | IN UINT32 Offset\r | |
5113 | )\r | |
5114 | {\r | |
5115 | UINT32 Data;\r | |
5116 | //\r | |
5117 | // Read direct if aligned\r | |
5118 | //\r | |
5119 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
5120 | return * (UINT32 *) (VmPtr->Ip + Offset);\r | |
5121 | }\r | |
5122 | //\r | |
5123 | // Return unaligned data\r | |
5124 | //\r | |
5125 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
5126 | Data |= (VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
5127 | return Data;\r | |
5128 | }\r | |
5129 | \r | |
5130 | \r | |
5131 | /**\r | |
5132 | Reads 64-bit unsigned data from the code stream.\r | |
5133 | \r | |
5134 | This routine provides the ability to read raw unsigned data from the code\r | |
5135 | stream.\r | |
5136 | \r | |
5137 | @param VmPtr A pointer to VM context\r | |
5138 | @param Offset Offset from current IP to the raw data to read.\r | |
5139 | \r | |
5140 | @return The raw unsigned 64-bit value from the code stream.\r | |
5141 | \r | |
5142 | **/\r | |
5143 | UINT64\r | |
5144 | VmReadCode64 (\r | |
5145 | IN VM_CONTEXT *VmPtr,\r | |
5146 | IN UINT32 Offset\r | |
5147 | )\r | |
5148 | {\r | |
5149 | UINT64 Data64;\r | |
5150 | UINT32 Data32;\r | |
5151 | UINT8 *Ptr;\r | |
5152 | \r | |
5153 | //\r | |
5154 | // Read direct if aligned\r | |
5155 | //\r | |
5156 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
5157 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
5158 | }\r | |
5159 | //\r | |
5160 | // Return unaligned data.\r | |
5161 | //\r | |
5162 | Ptr = (UINT8 *) &Data64;\r | |
5163 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
5164 | *(UINT32 *) Ptr = Data32;\r | |
5165 | Ptr += sizeof (Data32);\r | |
5166 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r | |
5167 | *(UINT32 *) Ptr = Data32;\r | |
5168 | return Data64;\r | |
5169 | }\r | |
5170 | \r | |
5171 | \r | |
5172 | /**\r | |
5173 | Reads 8-bit data form the memory address.\r | |
5174 | \r | |
5175 | @param VmPtr A pointer to VM context.\r | |
5176 | @param Addr The memory address.\r | |
5177 | \r | |
5178 | @return The 8-bit value from the memory address.\r | |
5179 | \r | |
5180 | **/\r | |
5181 | UINT8\r | |
5182 | VmReadMem8 (\r | |
5183 | IN VM_CONTEXT *VmPtr,\r | |
5184 | IN UINTN Addr\r | |
5185 | )\r | |
5186 | {\r | |
5187 | //\r | |
5188 | // Convert the address if it's in the stack gap\r | |
5189 | //\r | |
5190 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5191 | //\r | |
5192 | // Simply return the data in flat memory space\r | |
5193 | //\r | |
5194 | return * (UINT8 *) Addr;\r | |
5195 | }\r | |
5196 | \r | |
5197 | /**\r | |
5198 | Reads 16-bit data form the memory address.\r | |
5199 | \r | |
5200 | @param VmPtr A pointer to VM context.\r | |
5201 | @param Addr The memory address.\r | |
5202 | \r | |
5203 | @return The 16-bit value from the memory address.\r | |
5204 | \r | |
5205 | **/\r | |
5206 | UINT16\r | |
5207 | VmReadMem16 (\r | |
5208 | IN VM_CONTEXT *VmPtr,\r | |
5209 | IN UINTN Addr\r | |
5210 | )\r | |
5211 | {\r | |
5212 | //\r | |
5213 | // Convert the address if it's in the stack gap\r | |
5214 | //\r | |
5215 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5216 | //\r | |
5217 | // Read direct if aligned\r | |
5218 | //\r | |
5219 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
5220 | return * (UINT16 *) Addr;\r | |
5221 | }\r | |
5222 | //\r | |
5223 | // Return unaligned data\r | |
5224 | //\r | |
5225 | return (UINT16) (*(UINT8 *) Addr + (*(UINT8 *) (Addr + 1) << 8));\r | |
5226 | }\r | |
5227 | \r | |
5228 | /**\r | |
5229 | Reads 32-bit data form the memory address.\r | |
5230 | \r | |
5231 | @param VmPtr A pointer to VM context.\r | |
5232 | @param Addr The memory address.\r | |
5233 | \r | |
5234 | @return The 32-bit value from the memory address.\r | |
5235 | \r | |
5236 | **/\r | |
5237 | UINT32\r | |
5238 | VmReadMem32 (\r | |
5239 | IN VM_CONTEXT *VmPtr,\r | |
5240 | IN UINTN Addr\r | |
5241 | )\r | |
5242 | {\r | |
5243 | UINT32 Data;\r | |
5244 | \r | |
5245 | //\r | |
5246 | // Convert the address if it's in the stack gap\r | |
5247 | //\r | |
5248 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5249 | //\r | |
5250 | // Read direct if aligned\r | |
5251 | //\r | |
5252 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
5253 | return * (UINT32 *) Addr;\r | |
5254 | }\r | |
5255 | //\r | |
5256 | // Return unaligned data\r | |
5257 | //\r | |
5258 | Data = (UINT32) VmReadMem16 (VmPtr, Addr);\r | |
5259 | Data |= (VmReadMem16 (VmPtr, Addr + 2) << 16);\r | |
5260 | return Data;\r | |
5261 | }\r | |
5262 | \r | |
5263 | /**\r | |
5264 | Reads 64-bit data form the memory address.\r | |
5265 | \r | |
5266 | @param VmPtr A pointer to VM context.\r | |
5267 | @param Addr The memory address.\r | |
5268 | \r | |
5269 | @return The 64-bit value from the memory address.\r | |
5270 | \r | |
5271 | **/\r | |
5272 | UINT64\r | |
5273 | VmReadMem64 (\r | |
5274 | IN VM_CONTEXT *VmPtr,\r | |
5275 | IN UINTN Addr\r | |
5276 | )\r | |
5277 | {\r | |
5278 | UINT64 Data;\r | |
5279 | UINT32 Data32;\r | |
5280 | \r | |
5281 | //\r | |
5282 | // Convert the address if it's in the stack gap\r | |
5283 | //\r | |
5284 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5285 | \r | |
5286 | //\r | |
5287 | // Read direct if aligned\r | |
5288 | //\r | |
5289 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
5290 | return * (UINT64 *) Addr;\r | |
5291 | }\r | |
5292 | //\r | |
5293 | // Return unaligned data. Assume little endian.\r | |
5294 | //\r | |
5295 | Data32 = VmReadMem32 (VmPtr, Addr);\r | |
5296 | Data = (UINT64) VmReadMem32 (VmPtr, Addr + sizeof (UINT32));\r | |
5297 | Data = LShiftU64 (Data, 32) | Data32;\r | |
5298 | return Data;\r | |
5299 | }\r | |
5300 | \r | |
5301 | \r | |
5302 | /**\r | |
5303 | Given an address that EBC is going to read from or write to, return\r | |
5304 | an appropriate address that accounts for a gap in the stack.\r | |
5305 | The stack for this application looks like this (high addr on top)\r | |
5306 | [EBC entry point arguments]\r | |
5307 | [VM stack]\r | |
5308 | [EBC stack]\r | |
5309 | The EBC assumes that its arguments are at the top of its stack, which\r | |
5310 | is where the VM stack is really. Therefore if the EBC does memory\r | |
5311 | accesses into the VM stack area, then we need to convert the address\r | |
5312 | to point to the EBC entry point arguments area. Do this here.\r | |
5313 | \r | |
5314 | @param VmPtr A Pointer to VM context.\r | |
5315 | @param Addr Address of interest\r | |
5316 | \r | |
5317 | @return The unchanged address if it's not in the VM stack region. Otherwise,\r | |
5318 | adjust for the stack gap and return the modified address.\r | |
5319 | \r | |
5320 | **/\r | |
5321 | UINTN\r | |
5322 | ConvertStackAddr (\r | |
5323 | IN VM_CONTEXT *VmPtr,\r | |
5324 | IN UINTN Addr\r | |
5325 | )\r | |
5326 | {\r | |
5327 | ASSERT(((Addr < VmPtr->LowStackTop) || (Addr > VmPtr->HighStackBottom)));\r | |
5328 | return Addr;\r | |
5329 | }\r | |
5330 | \r | |
5331 | \r | |
5332 | /**\r | |
5333 | Read a natural value from memory. May or may not be aligned.\r | |
5334 | \r | |
5335 | @param VmPtr current VM context\r | |
5336 | @param Addr the address to read from\r | |
5337 | \r | |
5338 | @return The natural value at address Addr.\r | |
5339 | \r | |
5340 | **/\r | |
5341 | UINTN\r | |
5342 | VmReadMemN (\r | |
5343 | IN VM_CONTEXT *VmPtr,\r | |
5344 | IN UINTN Addr\r | |
5345 | )\r | |
5346 | {\r | |
5347 | UINTN Data;\r | |
5348 | volatile UINT32 Size;\r | |
5349 | UINT8 *FromPtr;\r | |
5350 | UINT8 *ToPtr;\r | |
5351 | //\r | |
5352 | // Convert the address if it's in the stack gap\r | |
5353 | //\r | |
5354 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5355 | //\r | |
5356 | // Read direct if aligned\r | |
5357 | //\r | |
5358 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
5359 | return * (UINTN *) Addr;\r | |
5360 | }\r | |
5361 | //\r | |
5362 | // Return unaligned data\r | |
5363 | //\r | |
5364 | Data = 0;\r | |
5365 | FromPtr = (UINT8 *) Addr;\r | |
5366 | ToPtr = (UINT8 *) &Data;\r | |
5367 | \r | |
5368 | for (Size = 0; Size < sizeof (Data); Size++) {\r | |
5369 | *ToPtr = *FromPtr;\r | |
5370 | ToPtr++;\r | |
5371 | FromPtr++;\r | |
5372 | }\r | |
5373 | \r | |
5374 | return Data;\r | |
5375 | }\r | |
5376 | \r | |
5377 | /**\r | |
5378 | Returns the version of the EBC virtual machine.\r | |
5379 | \r | |
5380 | @return The 64-bit version of EBC virtual machine.\r | |
5381 | \r | |
5382 | **/\r | |
5383 | UINT64\r | |
5384 | GetVmVersion (\r | |
5385 | VOID\r | |
5386 | )\r | |
5387 | {\r | |
5388 | return (UINT64) (((VM_MAJOR_VERSION & 0xFFFF) << 16) | ((VM_MINOR_VERSION & 0xFFFF)));\r | |
5389 | }\r |