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fb0b259e | 1 | /** @file\r |
2 | Contains code that implements the virtual machine.\r | |
53c71d09 | 3 | \r |
c8ad2d7a | 4 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r |
e5eed7d3 | 5 | This program and the accompanying materials\r |
fb0b259e | 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 | |
53c71d09 | 9 | \r |
fb0b259e | 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 | |
53c71d09 | 12 | \r |
fb0b259e | 13 | **/\r |
53c71d09 | 14 | \r |
15 | #include "EbcInt.h"\r | |
16 | #include "EbcExecute.h"\r | |
17 | \r | |
18 | \r | |
19 | //\r | |
20 | // Define some useful data size constants to allow switch statements based on\r | |
21 | // size of operands or data.\r | |
22 | //\r | |
23 | #define DATA_SIZE_INVALID 0\r | |
24 | #define DATA_SIZE_8 1\r | |
25 | #define DATA_SIZE_16 2\r | |
26 | #define DATA_SIZE_32 4\r | |
27 | #define DATA_SIZE_64 8\r | |
28 | #define DATA_SIZE_N 48 // 4 or 8\r | |
29 | //\r | |
30 | // Structure we'll use to dispatch opcodes to execute functions.\r | |
31 | //\r | |
32 | typedef struct {\r | |
33 | EFI_STATUS (*ExecuteFunction) (IN VM_CONTEXT * VmPtr);\r | |
34 | }\r | |
35 | VM_TABLE_ENTRY;\r | |
36 | \r | |
37 | typedef\r | |
38 | UINT64\r | |
39 | (*DATA_MANIP_EXEC_FUNCTION) (\r | |
40 | IN VM_CONTEXT * VmPtr,\r | |
41 | IN UINT64 Op1,\r | |
42 | IN UINT64 Op2\r | |
43 | );\r | |
44 | \r | |
8e3bc754 | 45 | /**\r |
46 | Decode a 16-bit index to determine the offset. Given an index value:\r | |
47 | \r | |
48 | b15 - sign bit\r | |
49 | b14:12 - number of bits in this index assigned to natural units (=a)\r | |
50 | ba:11 - constant units = ConstUnits\r | |
51 | b0:a - natural units = NaturalUnits\r | |
34e4e297 | 52 | \r |
8e3bc754 | 53 | Given this info, the offset can be computed by:\r |
54 | offset = sign_bit * (ConstUnits + NaturalUnits * sizeof(UINTN))\r | |
55 | \r | |
56 | Max offset is achieved with index = 0x7FFF giving an offset of\r | |
57 | 0x27B (32-bit machine) or 0x477 (64-bit machine).\r | |
34e4e297 | 58 | Min offset is achieved with index =\r |
8e3bc754 | 59 | \r |
60 | @param VmPtr A pointer to VM context.\r | |
61 | @param CodeOffset Offset from IP of the location of the 16-bit index\r | |
62 | to decode.\r | |
63 | \r | |
64 | @return The decoded offset.\r | |
65 | \r | |
66 | **/\r | |
53c71d09 | 67 | INT16\r |
68 | VmReadIndex16 (\r | |
ea7cb08c | 69 | IN VM_CONTEXT *VmPtr,\r |
70 | IN UINT32 CodeOffset\r | |
53c71d09 | 71 | );\r |
72 | \r | |
8e3bc754 | 73 | /**\r |
74 | Decode a 32-bit index to determine the offset.\r | |
75 | \r | |
76 | @param VmPtr A pointer to VM context.\r | |
77 | @param CodeOffset Offset from IP of the location of the 32-bit index\r | |
78 | to decode.\r | |
79 | \r | |
80 | @return Converted index per EBC VM specification.\r | |
81 | \r | |
82 | **/\r | |
53c71d09 | 83 | INT32\r |
84 | VmReadIndex32 (\r | |
ea7cb08c | 85 | IN VM_CONTEXT *VmPtr,\r |
86 | IN UINT32 CodeOffset\r | |
53c71d09 | 87 | );\r |
88 | \r | |
8e3bc754 | 89 | /**\r |
90 | Decode a 64-bit index to determine the offset.\r | |
91 | \r | |
92 | @param VmPtr A pointer to VM context.s\r | |
93 | @param CodeOffset Offset from IP of the location of the 64-bit index\r | |
94 | to decode.\r | |
95 | \r | |
96 | @return Converted index per EBC VM specification\r | |
97 | \r | |
98 | **/\r | |
53c71d09 | 99 | INT64\r |
100 | VmReadIndex64 (\r | |
ea7cb08c | 101 | IN VM_CONTEXT *VmPtr,\r |
102 | IN UINT32 CodeOffset\r | |
53c71d09 | 103 | );\r |
104 | \r | |
8e3bc754 | 105 | /**\r |
106 | Reads 8-bit data form the memory address.\r | |
107 | \r | |
108 | @param VmPtr A pointer to VM context.\r | |
109 | @param Addr The memory address.\r | |
110 | \r | |
48557c65 | 111 | @return The 8-bit value from the memory address.\r |
8e3bc754 | 112 | \r |
113 | **/\r | |
53c71d09 | 114 | UINT8\r |
115 | VmReadMem8 (\r | |
ea7cb08c | 116 | IN VM_CONTEXT *VmPtr,\r |
117 | IN UINTN Addr\r | |
53c71d09 | 118 | );\r |
119 | \r | |
8e3bc754 | 120 | /**\r |
121 | Reads 16-bit data form the memory address.\r | |
122 | \r | |
123 | @param VmPtr A pointer to VM context.\r | |
124 | @param Addr The memory address.\r | |
125 | \r | |
48557c65 | 126 | @return The 16-bit value from the memory address.\r |
8e3bc754 | 127 | \r |
128 | **/\r | |
53c71d09 | 129 | UINT16\r |
130 | VmReadMem16 (\r | |
131 | IN VM_CONTEXT *VmPtr,\r | |
132 | IN UINTN Addr\r | |
133 | );\r | |
134 | \r | |
8e3bc754 | 135 | /**\r |
136 | Reads 32-bit data form the memory address.\r | |
137 | \r | |
138 | @param VmPtr A pointer to VM context.\r | |
139 | @param Addr The memory address.\r | |
140 | \r | |
48557c65 | 141 | @return The 32-bit value from the memory address.\r |
8e3bc754 | 142 | \r |
143 | **/\r | |
53c71d09 | 144 | UINT32\r |
145 | VmReadMem32 (\r | |
146 | IN VM_CONTEXT *VmPtr,\r | |
147 | IN UINTN Addr\r | |
148 | );\r | |
149 | \r | |
8e3bc754 | 150 | /**\r |
151 | Reads 64-bit data form the memory address.\r | |
152 | \r | |
153 | @param VmPtr A pointer to VM context.\r | |
154 | @param Addr The memory address.\r | |
155 | \r | |
48557c65 | 156 | @return The 64-bit value from the memory address.\r |
8e3bc754 | 157 | \r |
158 | **/\r | |
53c71d09 | 159 | UINT64\r |
160 | VmReadMem64 (\r | |
ea7cb08c | 161 | IN VM_CONTEXT *VmPtr,\r |
162 | IN UINTN Addr\r | |
53c71d09 | 163 | );\r |
164 | \r | |
8e3bc754 | 165 | /**\r |
166 | Read a natural value from memory. May or may not be aligned.\r | |
167 | \r | |
168 | @param VmPtr current VM context\r | |
169 | @param Addr the address to read from\r | |
170 | \r | |
171 | @return The natural value at address Addr.\r | |
172 | \r | |
173 | **/\r | |
53c71d09 | 174 | UINTN\r |
175 | VmReadMemN (\r | |
ea7cb08c | 176 | IN VM_CONTEXT *VmPtr,\r |
177 | IN UINTN Addr\r | |
53c71d09 | 178 | );\r |
179 | \r | |
8e3bc754 | 180 | /**\r |
181 | Writes 8-bit data to memory address.\r | |
34e4e297 | 182 | \r |
8e3bc754 | 183 | This routine is called by the EBC data\r |
184 | movement instructions that write to memory. Since these writes\r | |
185 | may be to the stack, which looks like (high address on top) this,\r | |
186 | \r | |
187 | [EBC entry point arguments]\r | |
188 | [VM stack]\r | |
189 | [EBC stack]\r | |
190 | \r | |
191 | we need to detect all attempts to write to the EBC entry point argument\r | |
34e4e297 | 192 | stack area and adjust the address (which will initially point into the\r |
8e3bc754 | 193 | VM stack) to point into the EBC entry point arguments.\r |
194 | \r | |
195 | @param VmPtr A pointer to a VM context.\r | |
48557c65 | 196 | @param Addr Address to write to.\r |
8e3bc754 | 197 | @param Data Value to write to Addr.\r |
198 | \r | |
34e4e297 | 199 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
8e3bc754 | 200 | @retval Other Some error occurs when writing data to the address.\r |
201 | \r | |
202 | **/\r | |
53c71d09 | 203 | EFI_STATUS\r |
204 | VmWriteMem8 (\r | |
ea7cb08c | 205 | IN VM_CONTEXT *VmPtr,\r |
206 | IN UINTN Addr,\r | |
207 | IN UINT8 Data\r | |
53c71d09 | 208 | );\r |
209 | \r | |
8e3bc754 | 210 | /**\r |
211 | Writes 16-bit data to memory address.\r | |
34e4e297 | 212 | \r |
8e3bc754 | 213 | This routine is called by the EBC data\r |
214 | movement instructions that write to memory. Since these writes\r | |
215 | may be to the stack, which looks like (high address on top) this,\r | |
216 | \r | |
217 | [EBC entry point arguments]\r | |
218 | [VM stack]\r | |
219 | [EBC stack]\r | |
220 | \r | |
221 | we need to detect all attempts to write to the EBC entry point argument\r | |
34e4e297 | 222 | stack area and adjust the address (which will initially point into the\r |
8e3bc754 | 223 | VM stack) to point into the EBC entry point arguments.\r |
224 | \r | |
225 | @param VmPtr A pointer to a VM context.\r | |
48557c65 | 226 | @param Addr Address to write to.\r |
8e3bc754 | 227 | @param Data Value to write to Addr.\r |
228 | \r | |
34e4e297 | 229 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
8e3bc754 | 230 | @retval Other Some error occurs when writing data to the address.\r |
231 | \r | |
232 | **/\r | |
53c71d09 | 233 | EFI_STATUS\r |
234 | VmWriteMem16 (\r | |
ea7cb08c | 235 | IN VM_CONTEXT *VmPtr,\r |
236 | IN UINTN Addr,\r | |
237 | IN UINT16 Data\r | |
53c71d09 | 238 | );\r |
239 | \r | |
8e3bc754 | 240 | /**\r |
241 | Writes 32-bit data to memory address.\r | |
34e4e297 | 242 | \r |
8e3bc754 | 243 | This routine is called by the EBC data\r |
244 | movement instructions that write to memory. Since these writes\r | |
245 | may be to the stack, which looks like (high address on top) this,\r | |
246 | \r | |
247 | [EBC entry point arguments]\r | |
248 | [VM stack]\r | |
249 | [EBC stack]\r | |
250 | \r | |
251 | we need to detect all attempts to write to the EBC entry point argument\r | |
34e4e297 | 252 | stack area and adjust the address (which will initially point into the\r |
8e3bc754 | 253 | VM stack) to point into the EBC entry point arguments.\r |
254 | \r | |
255 | @param VmPtr A pointer to a VM context.\r | |
48557c65 | 256 | @param Addr Address to write to.\r |
8e3bc754 | 257 | @param Data Value to write to Addr.\r |
258 | \r | |
34e4e297 | 259 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
8e3bc754 | 260 | @retval Other Some error occurs when writing data to the address.\r |
261 | \r | |
262 | **/\r | |
53c71d09 | 263 | EFI_STATUS\r |
264 | VmWriteMem32 (\r | |
ea7cb08c | 265 | IN VM_CONTEXT *VmPtr,\r |
266 | IN UINTN Addr,\r | |
267 | IN UINT32 Data\r | |
53c71d09 | 268 | );\r |
269 | \r | |
8e3bc754 | 270 | /**\r |
48557c65 | 271 | Reads 16-bit unsigned data from the code stream.\r |
8e3bc754 | 272 | \r |
273 | This routine provides the ability to read raw unsigned data from the code\r | |
274 | stream.\r | |
275 | \r | |
276 | @param VmPtr A pointer to VM context\r | |
277 | @param Offset Offset from current IP to the raw data to read.\r | |
278 | \r | |
279 | @return The raw unsigned 16-bit value from the code stream.\r | |
280 | \r | |
281 | **/\r | |
53c71d09 | 282 | UINT16\r |
283 | VmReadCode16 (\r | |
284 | IN VM_CONTEXT *VmPtr,\r | |
285 | IN UINT32 Offset\r | |
286 | );\r | |
287 | \r | |
8e3bc754 | 288 | /**\r |
48557c65 | 289 | Reads 32-bit unsigned data from the code stream.\r |
8e3bc754 | 290 | \r |
291 | This routine provides the ability to read raw unsigned data from the code\r | |
292 | stream.\r | |
293 | \r | |
294 | @param VmPtr A pointer to VM context\r | |
295 | @param Offset Offset from current IP to the raw data to read.\r | |
296 | \r | |
297 | @return The raw unsigned 32-bit value from the code stream.\r | |
298 | \r | |
299 | **/\r | |
53c71d09 | 300 | UINT32\r |
301 | VmReadCode32 (\r | |
302 | IN VM_CONTEXT *VmPtr,\r | |
303 | IN UINT32 Offset\r | |
304 | );\r | |
305 | \r | |
8e3bc754 | 306 | /**\r |
48557c65 | 307 | Reads 64-bit unsigned data from the code stream.\r |
8e3bc754 | 308 | \r |
309 | This routine provides the ability to read raw unsigned data from the code\r | |
310 | stream.\r | |
311 | \r | |
312 | @param VmPtr A pointer to VM context\r | |
313 | @param Offset Offset from current IP to the raw data to read.\r | |
314 | \r | |
315 | @return The raw unsigned 64-bit value from the code stream.\r | |
316 | \r | |
317 | **/\r | |
53c71d09 | 318 | UINT64\r |
319 | VmReadCode64 (\r | |
320 | IN VM_CONTEXT *VmPtr,\r | |
321 | IN UINT32 Offset\r | |
322 | );\r | |
323 | \r | |
8e3bc754 | 324 | /**\r |
325 | Reads 8-bit immediate value at the offset.\r | |
326 | \r | |
327 | This routine is called by the EBC execute\r | |
328 | functions to read EBC immediate values from the code stream.\r | |
329 | Since we can't assume alignment, each tries to read in the biggest\r | |
330 | chunks size available, but will revert to smaller reads if necessary.\r | |
331 | \r | |
332 | @param VmPtr A pointer to a VM context.\r | |
333 | @param Offset offset from IP of the code bytes to read.\r | |
334 | \r | |
335 | @return Signed data of the requested size from the specified address.\r | |
336 | \r | |
337 | **/\r | |
53c71d09 | 338 | INT8\r |
339 | VmReadImmed8 (\r | |
340 | IN VM_CONTEXT *VmPtr,\r | |
341 | IN UINT32 Offset\r | |
342 | );\r | |
343 | \r | |
8e3bc754 | 344 | /**\r |
345 | Reads 16-bit immediate value at the offset.\r | |
346 | \r | |
347 | This routine is called by the EBC execute\r | |
348 | functions to read EBC immediate values from the code stream.\r | |
349 | Since we can't assume alignment, each tries to read in the biggest\r | |
350 | chunks size available, but will revert to smaller reads if necessary.\r | |
351 | \r | |
352 | @param VmPtr A pointer to a VM context.\r | |
353 | @param Offset offset from IP of the code bytes to read.\r | |
354 | \r | |
355 | @return Signed data of the requested size from the specified address.\r | |
356 | \r | |
357 | **/\r | |
53c71d09 | 358 | INT16\r |
359 | VmReadImmed16 (\r | |
360 | IN VM_CONTEXT *VmPtr,\r | |
361 | IN UINT32 Offset\r | |
362 | );\r | |
363 | \r | |
8e3bc754 | 364 | /**\r |
365 | Reads 32-bit immediate value at the offset.\r | |
366 | \r | |
367 | This routine is called by the EBC execute\r | |
368 | functions to read EBC immediate values from the code stream.\r | |
369 | Since we can't assume alignment, each tries to read in the biggest\r | |
370 | chunks size available, but will revert to smaller reads if necessary.\r | |
371 | \r | |
372 | @param VmPtr A pointer to a VM context.\r | |
373 | @param Offset offset from IP of the code bytes to read.\r | |
374 | \r | |
375 | @return Signed data of the requested size from the specified address.\r | |
376 | \r | |
377 | **/\r | |
53c71d09 | 378 | INT32\r |
379 | VmReadImmed32 (\r | |
380 | IN VM_CONTEXT *VmPtr,\r | |
381 | IN UINT32 Offset\r | |
382 | );\r | |
383 | \r | |
8e3bc754 | 384 | /**\r |
385 | Reads 64-bit immediate value at the offset.\r | |
386 | \r | |
387 | This routine is called by the EBC execute\r | |
388 | functions to read EBC immediate values from the code stream.\r | |
389 | Since we can't assume alignment, each tries to read in the biggest\r | |
390 | chunks size available, but will revert to smaller reads if necessary.\r | |
391 | \r | |
392 | @param VmPtr A pointer to a VM context.\r | |
393 | @param Offset offset from IP of the code bytes to read.\r | |
394 | \r | |
395 | @return Signed data of the requested size from the specified address.\r | |
396 | \r | |
397 | **/\r | |
53c71d09 | 398 | INT64\r |
399 | VmReadImmed64 (\r | |
400 | IN VM_CONTEXT *VmPtr,\r | |
401 | IN UINT32 Offset\r | |
402 | );\r | |
403 | \r | |
8e3bc754 | 404 | /**\r |
405 | Given an address that EBC is going to read from or write to, return\r | |
406 | an appropriate address that accounts for a gap in the stack.\r | |
407 | The stack for this application looks like this (high addr on top)\r | |
408 | [EBC entry point arguments]\r | |
409 | [VM stack]\r | |
410 | [EBC stack]\r | |
411 | The EBC assumes that its arguments are at the top of its stack, which\r | |
412 | is where the VM stack is really. Therefore if the EBC does memory\r | |
413 | accesses into the VM stack area, then we need to convert the address\r | |
414 | to point to the EBC entry point arguments area. Do this here.\r | |
415 | \r | |
416 | @param VmPtr A Pointer to VM context.\r | |
417 | @param Addr Address of interest\r | |
418 | \r | |
419 | @return The unchanged address if it's not in the VM stack region. Otherwise,\r | |
420 | adjust for the stack gap and return the modified address.\r | |
421 | \r | |
422 | **/\r | |
53c71d09 | 423 | UINTN\r |
424 | ConvertStackAddr (\r | |
ea7cb08c | 425 | IN VM_CONTEXT *VmPtr,\r |
426 | IN UINTN Addr\r | |
53c71d09 | 427 | );\r |
428 | \r | |
8e3bc754 | 429 | /**\r |
430 | Execute all the EBC data manipulation instructions.\r | |
431 | Since the EBC data manipulation instructions all have the same basic form,\r | |
432 | they can share the code that does the fetch of operands and the write-back\r | |
433 | of the result. This function performs the fetch of the operands (even if\r | |
434 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
435 | appropriate subfunction, then writes back the returned result.\r | |
436 | \r | |
437 | Format:\r | |
438 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
439 | \r | |
440 | @param VmPtr A pointer to VM context.\r | |
441 | @param IsSignedOp Indicates whether the operand is signed or not.\r | |
442 | \r | |
34e4e297 | 443 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 444 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
445 | \r | |
446 | **/\r | |
53c71d09 | 447 | EFI_STATUS\r |
448 | ExecuteDataManip (\r | |
449 | IN VM_CONTEXT *VmPtr,\r | |
8e3bc754 | 450 | IN BOOLEAN IsSignedOp\r |
53c71d09 | 451 | );\r |
452 | \r | |
453 | //\r | |
454 | // Functions that execute VM opcodes\r | |
455 | //\r | |
8e3bc754 | 456 | /**\r |
457 | Execute the EBC BREAK instruction.\r | |
458 | \r | |
459 | @param VmPtr A pointer to a VM context.\r | |
460 | \r | |
461 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
462 | \r | |
463 | **/\r | |
53c71d09 | 464 | EFI_STATUS\r |
465 | ExecuteBREAK (\r | |
466 | IN VM_CONTEXT *VmPtr\r | |
467 | );\r | |
468 | \r | |
8e3bc754 | 469 | /**\r |
470 | Execute the JMP instruction.\r | |
471 | \r | |
472 | Instruction syntax:\r | |
473 | JMP64{cs|cc} Immed64\r | |
474 | JMP32{cs|cc} {@}R1 {Immed32|Index32}\r | |
34e4e297 | 475 | \r |
8e3bc754 | 476 | Encoding:\r |
477 | b0.7 - immediate data present\r | |
478 | b0.6 - 1 = 64 bit immediate data\r | |
479 | 0 = 32 bit immediate data\r | |
480 | b1.7 - 1 = conditional\r | |
481 | b1.6 1 = CS (condition set)\r | |
482 | 0 = CC (condition clear)\r | |
483 | b1.4 1 = relative address\r | |
484 | 0 = absolute address\r | |
485 | b1.3 1 = operand1 indirect\r | |
486 | b1.2-0 operand 1\r | |
487 | \r | |
488 | @param VmPtr A pointer to a VM context.\r | |
489 | \r | |
490 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
491 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
492 | \r | |
493 | **/\r | |
53c71d09 | 494 | EFI_STATUS\r |
495 | ExecuteJMP (\r | |
496 | IN VM_CONTEXT *VmPtr\r | |
497 | );\r | |
498 | \r | |
8e3bc754 | 499 | /**\r |
500 | Execute the EBC JMP8 instruction.\r | |
501 | \r | |
502 | Instruction syntax:\r | |
503 | JMP8{cs|cc} Offset/2\r | |
504 | \r | |
505 | @param VmPtr A pointer to a VM context.\r | |
506 | \r | |
507 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
508 | \r | |
509 | **/\r | |
53c71d09 | 510 | EFI_STATUS\r |
511 | ExecuteJMP8 (\r | |
512 | IN VM_CONTEXT *VmPtr\r | |
513 | );\r | |
514 | \r | |
8e3bc754 | 515 | /**\r |
516 | Implements the EBC CALL instruction.\r | |
517 | \r | |
518 | Instruction format:\r | |
519 | CALL64 Immed64\r | |
520 | CALL32 {@}R1 {Immed32|Index32}\r | |
521 | CALLEX64 Immed64\r | |
522 | CALLEX16 {@}R1 {Immed32}\r | |
523 | \r | |
524 | If Rx == R0, then it's a PC relative call to PC = PC + imm32.\r | |
525 | \r | |
526 | @param VmPtr A pointer to a VM context.\r | |
527 | \r | |
528 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
529 | \r | |
530 | **/\r | |
53c71d09 | 531 | EFI_STATUS\r |
532 | ExecuteCALL (\r | |
533 | IN VM_CONTEXT *VmPtr\r | |
534 | );\r | |
535 | \r | |
8e3bc754 | 536 | /**\r |
537 | Execute the EBC RET instruction.\r | |
538 | \r | |
539 | Instruction syntax:\r | |
540 | RET\r | |
541 | \r | |
542 | @param VmPtr A pointer to a VM context.\r | |
543 | \r | |
544 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
545 | \r | |
546 | **/\r | |
53c71d09 | 547 | EFI_STATUS\r |
548 | ExecuteRET (\r | |
549 | IN VM_CONTEXT *VmPtr\r | |
550 | );\r | |
551 | \r | |
8e3bc754 | 552 | /**\r |
553 | Execute the EBC CMP instruction.\r | |
554 | \r | |
555 | Instruction syntax:\r | |
556 | CMP[32|64][eq|lte|gte|ulte|ugte] R1, {@}R2 {Index16|Immed16}\r | |
557 | \r | |
558 | @param VmPtr A pointer to a VM context.\r | |
559 | \r | |
34e4e297 | 560 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 561 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
562 | \r | |
563 | **/\r | |
53c71d09 | 564 | EFI_STATUS\r |
565 | ExecuteCMP (\r | |
566 | IN VM_CONTEXT *VmPtr\r | |
567 | );\r | |
568 | \r | |
8e3bc754 | 569 | /**\r |
570 | Execute the EBC CMPI instruction\r | |
571 | \r | |
572 | Instruction syntax:\r | |
573 | CMPI[32|64]{w|d}[eq|lte|gte|ulte|ugte] {@}Rx {Index16}, Immed16|Immed32\r | |
574 | \r | |
575 | @param VmPtr A pointer to a VM context.\r | |
576 | \r | |
34e4e297 | 577 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 578 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
579 | \r | |
580 | **/\r | |
53c71d09 | 581 | EFI_STATUS\r |
582 | ExecuteCMPI (\r | |
583 | IN VM_CONTEXT *VmPtr\r | |
584 | );\r | |
585 | \r | |
8e3bc754 | 586 | /**\r |
587 | Execute the MOVxx instructions.\r | |
588 | \r | |
589 | Instruction format:\r | |
34e4e297 | 590 | \r |
8e3bc754 | 591 | MOV[b|w|d|q|n]{w|d} {@}R1 {Index16|32}, {@}R2 {Index16|32}\r |
592 | MOVqq {@}R1 {Index64}, {@}R2 {Index64}\r | |
34e4e297 | 593 | \r |
8e3bc754 | 594 | Copies contents of [R2] -> [R1], zero extending where required.\r |
34e4e297 | 595 | \r |
8e3bc754 | 596 | First character indicates the size of the move.\r |
597 | Second character indicates the size of the index(s).\r | |
34e4e297 | 598 | \r |
8e3bc754 | 599 | Invalid to have R1 direct with index.\r |
600 | \r | |
601 | @param VmPtr A pointer to a VM context.\r | |
602 | \r | |
603 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
604 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
605 | \r | |
606 | **/\r | |
53c71d09 | 607 | EFI_STATUS\r |
608 | ExecuteMOVxx (\r | |
609 | IN VM_CONTEXT *VmPtr\r | |
610 | );\r | |
611 | \r | |
8e3bc754 | 612 | /**\r |
613 | Execute the EBC MOVI.\r | |
614 | \r | |
615 | Instruction syntax:\r | |
34e4e297 | 616 | \r |
8e3bc754 | 617 | MOVI[b|w|d|q][w|d|q] {@}R1 {Index16}, ImmData16|32|64\r |
34e4e297 | 618 | \r |
8e3bc754 | 619 | First variable character specifies the move size\r |
620 | Second variable character specifies size of the immediate data\r | |
34e4e297 | 621 | \r |
8e3bc754 | 622 | Sign-extend the immediate data to the size of the operation, and zero-extend\r |
623 | if storing to a register.\r | |
34e4e297 | 624 | \r |
8e3bc754 | 625 | Operand1 direct with index/immed is invalid.\r |
626 | \r | |
627 | @param VmPtr A pointer to a VM context.\r | |
628 | \r | |
34e4e297 | 629 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 630 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
631 | \r | |
632 | **/\r | |
53c71d09 | 633 | EFI_STATUS\r |
634 | ExecuteMOVI (\r | |
635 | IN VM_CONTEXT *VmPtr\r | |
636 | );\r | |
637 | \r | |
8e3bc754 | 638 | /**\r |
639 | Execute the EBC MOV immediate natural. This instruction moves an immediate\r | |
640 | index value into a register or memory location.\r | |
641 | \r | |
642 | Instruction syntax:\r | |
34e4e297 | 643 | \r |
8e3bc754 | 644 | MOVIn[w|d|q] {@}R1 {Index16}, Index16|32|64\r |
645 | \r | |
646 | @param VmPtr A pointer to a VM context.\r | |
647 | \r | |
34e4e297 | 648 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 649 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
650 | \r | |
651 | **/\r | |
53c71d09 | 652 | EFI_STATUS\r |
653 | ExecuteMOVIn (\r | |
654 | IN VM_CONTEXT *VmPtr\r | |
655 | );\r | |
656 | \r | |
8e3bc754 | 657 | /**\r |
658 | Execute the EBC MOVREL instruction.\r | |
659 | Dest <- Ip + ImmData\r | |
660 | \r | |
661 | Instruction syntax:\r | |
34e4e297 | 662 | \r |
8e3bc754 | 663 | MOVREL[w|d|q] {@}R1 {Index16}, ImmData16|32|64\r |
664 | \r | |
665 | @param VmPtr A pointer to a VM context.\r | |
666 | \r | |
34e4e297 | 667 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 668 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
669 | \r | |
670 | **/\r | |
53c71d09 | 671 | EFI_STATUS\r |
672 | ExecuteMOVREL (\r | |
673 | IN VM_CONTEXT *VmPtr\r | |
674 | );\r | |
675 | \r | |
8e3bc754 | 676 | /**\r |
677 | Execute the EBC PUSHn instruction\r | |
678 | \r | |
679 | Instruction syntax:\r | |
680 | PUSHn {@}R1 {Index16|Immed16}\r | |
681 | \r | |
682 | @param VmPtr A pointer to a VM context.\r | |
683 | \r | |
684 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
685 | \r | |
686 | **/\r | |
53c71d09 | 687 | EFI_STATUS\r |
688 | ExecutePUSHn (\r | |
689 | IN VM_CONTEXT *VmPtr\r | |
690 | );\r | |
691 | \r | |
8e3bc754 | 692 | /**\r |
693 | Execute the EBC PUSH instruction.\r | |
694 | \r | |
695 | Instruction syntax:\r | |
696 | PUSH[32|64] {@}R1 {Index16|Immed16}\r | |
697 | \r | |
698 | @param VmPtr A pointer to a VM context.\r | |
699 | \r | |
700 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
701 | \r | |
702 | **/\r | |
53c71d09 | 703 | EFI_STATUS\r |
704 | ExecutePUSH (\r | |
705 | IN VM_CONTEXT *VmPtr\r | |
706 | );\r | |
707 | \r | |
8e3bc754 | 708 | /**\r |
709 | Execute the EBC POPn instruction.\r | |
710 | \r | |
711 | Instruction syntax:\r | |
712 | POPn {@}R1 {Index16|Immed16}\r | |
713 | \r | |
714 | @param VmPtr A pointer to a VM context.\r | |
715 | \r | |
716 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
717 | \r | |
718 | **/\r | |
53c71d09 | 719 | EFI_STATUS\r |
720 | ExecutePOPn (\r | |
721 | IN VM_CONTEXT *VmPtr\r | |
722 | );\r | |
723 | \r | |
8e3bc754 | 724 | /**\r |
725 | Execute the EBC POP instruction.\r | |
726 | \r | |
727 | Instruction syntax:\r | |
728 | POPn {@}R1 {Index16|Immed16}\r | |
729 | \r | |
730 | @param VmPtr A pointer to a VM context.\r | |
731 | \r | |
732 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
733 | \r | |
734 | **/\r | |
53c71d09 | 735 | EFI_STATUS\r |
736 | ExecutePOP (\r | |
737 | IN VM_CONTEXT *VmPtr\r | |
738 | );\r | |
739 | \r | |
8e3bc754 | 740 | /**\r |
741 | Execute all the EBC signed data manipulation instructions.\r | |
742 | Since the EBC data manipulation instructions all have the same basic form,\r | |
743 | they can share the code that does the fetch of operands and the write-back\r | |
744 | of the result. This function performs the fetch of the operands (even if\r | |
745 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
746 | appropriate subfunction, then writes back the returned result.\r | |
747 | \r | |
748 | Format:\r | |
749 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
750 | \r | |
751 | @param VmPtr A pointer to VM context.\r | |
752 | \r | |
34e4e297 | 753 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 754 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
755 | \r | |
756 | **/\r | |
53c71d09 | 757 | EFI_STATUS\r |
758 | ExecuteSignedDataManip (\r | |
ea7cb08c | 759 | IN VM_CONTEXT *VmPtr\r |
53c71d09 | 760 | );\r |
761 | \r | |
8e3bc754 | 762 | /**\r |
763 | Execute all the EBC unsigned data manipulation instructions.\r | |
764 | Since the EBC data manipulation instructions all have the same basic form,\r | |
765 | they can share the code that does the fetch of operands and the write-back\r | |
766 | of the result. This function performs the fetch of the operands (even if\r | |
767 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
768 | appropriate subfunction, then writes back the returned result.\r | |
769 | \r | |
770 | Format:\r | |
771 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
772 | \r | |
773 | @param VmPtr A pointer to VM context.\r | |
774 | \r | |
34e4e297 | 775 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 776 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
777 | \r | |
778 | **/\r | |
53c71d09 | 779 | EFI_STATUS\r |
780 | ExecuteUnsignedDataManip (\r | |
ea7cb08c | 781 | IN VM_CONTEXT *VmPtr\r |
53c71d09 | 782 | );\r |
783 | \r | |
8e3bc754 | 784 | /**\r |
785 | Execute the EBC LOADSP instruction.\r | |
786 | \r | |
787 | Instruction syntax:\r | |
788 | LOADSP SP1, R2\r | |
789 | \r | |
790 | @param VmPtr A pointer to a VM context.\r | |
791 | \r | |
34e4e297 | 792 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 793 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
794 | \r | |
795 | **/\r | |
53c71d09 | 796 | EFI_STATUS\r |
797 | ExecuteLOADSP (\r | |
798 | IN VM_CONTEXT *VmPtr\r | |
799 | );\r | |
800 | \r | |
8e3bc754 | 801 | /**\r |
802 | Execute the EBC STORESP instruction.\r | |
803 | \r | |
804 | Instruction syntax:\r | |
805 | STORESP Rx, FLAGS|IP\r | |
806 | \r | |
807 | @param VmPtr A pointer to a VM context.\r | |
808 | \r | |
34e4e297 | 809 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 810 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
811 | \r | |
812 | **/\r | |
53c71d09 | 813 | EFI_STATUS\r |
814 | ExecuteSTORESP (\r | |
815 | IN VM_CONTEXT *VmPtr\r | |
816 | );\r | |
817 | \r | |
8e3bc754 | 818 | /**\r |
819 | Execute the EBC MOVsnw instruction. This instruction loads a signed\r | |
820 | natural value from memory or register to another memory or register. On\r | |
821 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
822 | is a register.\r | |
823 | \r | |
824 | Instruction syntax:\r | |
34e4e297 | 825 | \r |
8e3bc754 | 826 | MOVsnd {@}R1 {Indx32}, {@}R2 {Index32|Immed32}\r |
34e4e297 | 827 | \r |
8e3bc754 | 828 | 0:7 1=>operand1 index present\r |
829 | 0:6 1=>operand2 index present\r | |
830 | \r | |
831 | @param VmPtr A pointer to a VM context.\r | |
832 | \r | |
34e4e297 | 833 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 834 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
835 | \r | |
836 | **/\r | |
53c71d09 | 837 | EFI_STATUS\r |
838 | ExecuteMOVsnd (\r | |
839 | IN VM_CONTEXT *VmPtr\r | |
840 | );\r | |
841 | \r | |
8e3bc754 | 842 | /**\r |
843 | Execute the EBC MOVsnw instruction. This instruction loads a signed\r | |
844 | natural value from memory or register to another memory or register. On\r | |
845 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
846 | is a register.\r | |
847 | \r | |
848 | Instruction syntax:\r | |
34e4e297 | 849 | \r |
8e3bc754 | 850 | MOVsnw {@}R1 {Index16}, {@}R2 {Index16|Immed16}\r |
34e4e297 | 851 | \r |
8e3bc754 | 852 | 0:7 1=>operand1 index present\r |
853 | 0:6 1=>operand2 index present\r | |
854 | \r | |
855 | @param VmPtr A pointer to a VM context.\r | |
856 | \r | |
34e4e297 | 857 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 858 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
859 | \r | |
860 | **/\r | |
53c71d09 | 861 | EFI_STATUS\r |
862 | ExecuteMOVsnw (\r | |
863 | IN VM_CONTEXT *VmPtr\r | |
864 | );\r | |
865 | \r | |
866 | //\r | |
867 | // Data manipulation subfunctions\r | |
868 | //\r | |
8e3bc754 | 869 | /**\r |
870 | Execute the EBC NOT instruction.s\r | |
871 | \r | |
872 | Instruction syntax:\r | |
873 | NOT[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
874 | \r | |
875 | @param VmPtr A pointer to a VM context.\r | |
876 | @param Op1 Operand 1 from the instruction\r | |
877 | @param Op2 Operand 2 from the instruction\r | |
878 | \r | |
879 | @return ~Op2\r | |
880 | \r | |
881 | **/\r | |
53c71d09 | 882 | UINT64\r |
883 | ExecuteNOT (\r | |
ea7cb08c | 884 | IN VM_CONTEXT *VmPtr,\r |
885 | IN UINT64 Op1,\r | |
886 | IN UINT64 Op2\r | |
53c71d09 | 887 | );\r |
888 | \r | |
8e3bc754 | 889 | /**\r |
890 | Execute the EBC NEG instruction.\r | |
891 | \r | |
892 | Instruction syntax:\r | |
893 | NEG[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
894 | \r | |
895 | @param VmPtr A pointer to a VM context.\r | |
896 | @param Op1 Operand 1 from the instruction\r | |
897 | @param Op2 Operand 2 from the instruction\r | |
898 | \r | |
899 | @return Op2 * -1\r | |
900 | \r | |
901 | **/\r | |
53c71d09 | 902 | UINT64\r |
903 | ExecuteNEG (\r | |
ea7cb08c | 904 | IN VM_CONTEXT *VmPtr,\r |
905 | IN UINT64 Op1,\r | |
906 | IN UINT64 Op2\r | |
53c71d09 | 907 | );\r |
908 | \r | |
8e3bc754 | 909 | /**\r |
910 | Execute the EBC ADD instruction.\r | |
911 | \r | |
912 | Instruction syntax:\r | |
913 | ADD[32|64] {@}R1, {@}R2 {Index16}\r | |
914 | \r | |
915 | @param VmPtr A pointer to a VM context.\r | |
916 | @param Op1 Operand 1 from the instruction\r | |
917 | @param Op2 Operand 2 from the instruction\r | |
918 | \r | |
919 | @return Op1 + Op2\r | |
920 | \r | |
921 | **/\r | |
53c71d09 | 922 | UINT64\r |
923 | ExecuteADD (\r | |
ea7cb08c | 924 | IN VM_CONTEXT *VmPtr,\r |
925 | IN UINT64 Op1,\r | |
926 | IN UINT64 Op2\r | |
53c71d09 | 927 | );\r |
928 | \r | |
8e3bc754 | 929 | /**\r |
930 | Execute the EBC SUB instruction.\r | |
931 | \r | |
932 | Instruction syntax:\r | |
933 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
934 | \r | |
935 | @param VmPtr A pointer to a VM context.\r | |
936 | @param Op1 Operand 1 from the instruction\r | |
937 | @param Op2 Operand 2 from the instruction\r | |
938 | \r | |
939 | @return Op1 - Op2\r | |
940 | \r | |
941 | **/\r | |
53c71d09 | 942 | UINT64\r |
943 | ExecuteSUB (\r | |
ea7cb08c | 944 | IN VM_CONTEXT *VmPtr,\r |
945 | IN UINT64 Op1,\r | |
946 | IN UINT64 Op2\r | |
53c71d09 | 947 | );\r |
948 | \r | |
8e3bc754 | 949 | /**\r |
950 | Execute the EBC MUL instruction.\r | |
951 | \r | |
952 | Instruction syntax:\r | |
953 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
954 | \r | |
955 | @param VmPtr A pointer to a VM context.\r | |
956 | @param Op1 Operand 1 from the instruction\r | |
957 | @param Op2 Operand 2 from the instruction\r | |
958 | \r | |
959 | @return Op1 * Op2\r | |
960 | \r | |
961 | **/\r | |
53c71d09 | 962 | UINT64\r |
963 | ExecuteMUL (\r | |
ea7cb08c | 964 | IN VM_CONTEXT *VmPtr,\r |
965 | IN UINT64 Op1,\r | |
966 | IN UINT64 Op2\r | |
53c71d09 | 967 | );\r |
968 | \r | |
8e3bc754 | 969 | /**\r |
970 | Execute the EBC MULU instruction\r | |
971 | \r | |
972 | Instruction syntax:\r | |
973 | MULU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
974 | \r | |
975 | @param VmPtr A pointer to a VM context.\r | |
976 | @param Op1 Operand 1 from the instruction\r | |
977 | @param Op2 Operand 2 from the instruction\r | |
978 | \r | |
979 | @return (unsigned)Op1 * (unsigned)Op2\r | |
980 | \r | |
981 | **/\r | |
53c71d09 | 982 | UINT64\r |
983 | ExecuteMULU (\r | |
ea7cb08c | 984 | IN VM_CONTEXT *VmPtr,\r |
985 | IN UINT64 Op1,\r | |
986 | IN UINT64 Op2\r | |
53c71d09 | 987 | );\r |
988 | \r | |
8e3bc754 | 989 | /**\r |
990 | Execute the EBC DIV instruction.\r | |
991 | \r | |
992 | Instruction syntax:\r | |
993 | DIV[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
994 | \r | |
995 | @param VmPtr A pointer to a VM context.\r | |
996 | @param Op1 Operand 1 from the instruction\r | |
997 | @param Op2 Operand 2 from the instruction\r | |
998 | \r | |
999 | @return Op1 / Op2\r | |
1000 | \r | |
1001 | **/\r | |
53c71d09 | 1002 | UINT64\r |
1003 | ExecuteDIV (\r | |
ea7cb08c | 1004 | IN VM_CONTEXT *VmPtr,\r |
1005 | IN UINT64 Op1,\r | |
1006 | IN UINT64 Op2\r | |
53c71d09 | 1007 | );\r |
1008 | \r | |
8e3bc754 | 1009 | /**\r |
1010 | Execute the EBC DIVU instruction\r | |
1011 | \r | |
1012 | Instruction syntax:\r | |
1013 | DIVU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1014 | \r | |
1015 | @param VmPtr A pointer to a VM context.\r | |
1016 | @param Op1 Operand 1 from the instruction\r | |
1017 | @param Op2 Operand 2 from the instruction\r | |
1018 | \r | |
1019 | @return (unsigned)Op1 / (unsigned)Op2\r | |
1020 | \r | |
1021 | **/\r | |
53c71d09 | 1022 | UINT64\r |
1023 | ExecuteDIVU (\r | |
ea7cb08c | 1024 | IN VM_CONTEXT *VmPtr,\r |
1025 | IN UINT64 Op1,\r | |
1026 | IN UINT64 Op2\r | |
53c71d09 | 1027 | );\r |
1028 | \r | |
8e3bc754 | 1029 | /**\r |
1030 | Execute the EBC MOD instruction.\r | |
1031 | \r | |
1032 | Instruction syntax:\r | |
1033 | MOD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1034 | \r | |
1035 | @param VmPtr A pointer to a VM context.\r | |
1036 | @param Op1 Operand 1 from the instruction\r | |
1037 | @param Op2 Operand 2 from the instruction\r | |
1038 | \r | |
1039 | @return Op1 MODULUS Op2\r | |
1040 | \r | |
1041 | **/\r | |
53c71d09 | 1042 | UINT64\r |
1043 | ExecuteMOD (\r | |
ea7cb08c | 1044 | IN VM_CONTEXT *VmPtr,\r |
1045 | IN UINT64 Op1,\r | |
1046 | IN UINT64 Op2\r | |
53c71d09 | 1047 | );\r |
1048 | \r | |
8e3bc754 | 1049 | /**\r |
1050 | Execute the EBC MODU instruction.\r | |
1051 | \r | |
1052 | Instruction syntax:\r | |
1053 | MODU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1054 | \r | |
1055 | @param VmPtr A pointer to a VM context.\r | |
1056 | @param Op1 Operand 1 from the instruction\r | |
1057 | @param Op2 Operand 2 from the instruction\r | |
1058 | \r | |
1059 | @return Op1 UNSIGNED_MODULUS Op2\r | |
1060 | \r | |
1061 | **/\r | |
53c71d09 | 1062 | UINT64\r |
1063 | ExecuteMODU (\r | |
ea7cb08c | 1064 | IN VM_CONTEXT *VmPtr,\r |
1065 | IN UINT64 Op1,\r | |
1066 | IN UINT64 Op2\r | |
53c71d09 | 1067 | );\r |
1068 | \r | |
8e3bc754 | 1069 | /**\r |
1070 | Execute the EBC AND instruction.\r | |
1071 | \r | |
1072 | Instruction syntax:\r | |
1073 | AND[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1074 | \r | |
1075 | @param VmPtr A pointer to a VM context.\r | |
1076 | @param Op1 Operand 1 from the instruction\r | |
1077 | @param Op2 Operand 2 from the instruction\r | |
1078 | \r | |
1079 | @return Op1 AND Op2\r | |
1080 | \r | |
1081 | **/\r | |
53c71d09 | 1082 | UINT64\r |
1083 | ExecuteAND (\r | |
ea7cb08c | 1084 | IN VM_CONTEXT *VmPtr,\r |
1085 | IN UINT64 Op1,\r | |
1086 | IN UINT64 Op2\r | |
53c71d09 | 1087 | );\r |
1088 | \r | |
8e3bc754 | 1089 | /**\r |
1090 | Execute the EBC OR instruction.\r | |
1091 | \r | |
1092 | Instruction syntax:\r | |
1093 | OR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1094 | \r | |
1095 | @param VmPtr A pointer to a VM context.\r | |
1096 | @param Op1 Operand 1 from the instruction\r | |
1097 | @param Op2 Operand 2 from the instruction\r | |
1098 | \r | |
1099 | @return Op1 OR Op2\r | |
1100 | \r | |
1101 | **/\r | |
53c71d09 | 1102 | UINT64\r |
1103 | ExecuteOR (\r | |
ea7cb08c | 1104 | IN VM_CONTEXT *VmPtr,\r |
1105 | IN UINT64 Op1,\r | |
1106 | IN UINT64 Op2\r | |
53c71d09 | 1107 | );\r |
1108 | \r | |
8e3bc754 | 1109 | /**\r |
1110 | Execute the EBC XOR instruction.\r | |
1111 | \r | |
1112 | Instruction syntax:\r | |
1113 | XOR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1114 | \r | |
1115 | @param VmPtr A pointer to a VM context.\r | |
1116 | @param Op1 Operand 1 from the instruction\r | |
1117 | @param Op2 Operand 2 from the instruction\r | |
1118 | \r | |
1119 | @return Op1 XOR Op2\r | |
1120 | \r | |
1121 | **/\r | |
53c71d09 | 1122 | UINT64\r |
1123 | ExecuteXOR (\r | |
ea7cb08c | 1124 | IN VM_CONTEXT *VmPtr,\r |
1125 | IN UINT64 Op1,\r | |
1126 | IN UINT64 Op2\r | |
53c71d09 | 1127 | );\r |
1128 | \r | |
8e3bc754 | 1129 | /**\r |
1130 | Execute the EBC SHL shift left instruction.\r | |
1131 | \r | |
1132 | Instruction syntax:\r | |
1133 | SHL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1134 | \r | |
1135 | @param VmPtr A pointer to a VM context.\r | |
1136 | @param Op1 Operand 1 from the instruction\r | |
1137 | @param Op2 Operand 2 from the instruction\r | |
1138 | \r | |
1139 | @return Op1 << Op2\r | |
1140 | \r | |
1141 | **/\r | |
53c71d09 | 1142 | UINT64\r |
1143 | ExecuteSHL (\r | |
ea7cb08c | 1144 | IN VM_CONTEXT *VmPtr,\r |
1145 | IN UINT64 Op1,\r | |
1146 | IN UINT64 Op2\r | |
53c71d09 | 1147 | );\r |
1148 | \r | |
8e3bc754 | 1149 | /**\r |
1150 | Execute the EBC SHR instruction.\r | |
1151 | \r | |
1152 | Instruction syntax:\r | |
1153 | SHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1154 | \r | |
1155 | @param VmPtr A pointer to a VM context.\r | |
1156 | @param Op1 Operand 1 from the instruction\r | |
1157 | @param Op2 Operand 2 from the instruction\r | |
1158 | \r | |
1159 | @return Op1 >> Op2 (unsigned operands)\r | |
1160 | \r | |
1161 | **/\r | |
53c71d09 | 1162 | UINT64\r |
1163 | ExecuteSHR (\r | |
ea7cb08c | 1164 | IN VM_CONTEXT *VmPtr,\r |
1165 | IN UINT64 Op1,\r | |
1166 | IN UINT64 Op2\r | |
53c71d09 | 1167 | );\r |
1168 | \r | |
8e3bc754 | 1169 | /**\r |
1170 | Execute the EBC ASHR instruction.\r | |
1171 | \r | |
1172 | Instruction syntax:\r | |
1173 | ASHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1174 | \r | |
1175 | @param VmPtr A pointer to a VM context.\r | |
1176 | @param Op1 Operand 1 from the instruction\r | |
1177 | @param Op2 Operand 2 from the instruction\r | |
1178 | \r | |
1179 | @return Op1 >> Op2 (signed)\r | |
1180 | \r | |
1181 | **/\r | |
53c71d09 | 1182 | UINT64\r |
1183 | ExecuteASHR (\r | |
ea7cb08c | 1184 | IN VM_CONTEXT *VmPtr,\r |
1185 | IN UINT64 Op1,\r | |
1186 | IN UINT64 Op2\r | |
53c71d09 | 1187 | );\r |
1188 | \r | |
8e3bc754 | 1189 | /**\r |
1190 | Execute the EBC EXTNDB instruction to sign-extend a byte value.\r | |
1191 | \r | |
1192 | Instruction syntax:\r | |
1193 | EXTNDB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1194 | \r | |
1195 | @param VmPtr A pointer to a VM context.\r | |
1196 | @param Op1 Operand 1 from the instruction\r | |
1197 | @param Op2 Operand 2 from the instruction\r | |
1198 | \r | |
1199 | @return (INT64)(INT8)Op2\r | |
1200 | \r | |
1201 | **/\r | |
53c71d09 | 1202 | UINT64\r |
1203 | ExecuteEXTNDB (\r | |
ea7cb08c | 1204 | IN VM_CONTEXT *VmPtr,\r |
1205 | IN UINT64 Op1,\r | |
1206 | IN UINT64 Op2\r | |
53c71d09 | 1207 | );\r |
1208 | \r | |
8e3bc754 | 1209 | /**\r |
1210 | Execute the EBC EXTNDW instruction to sign-extend a 16-bit value.\r | |
1211 | \r | |
1212 | Instruction syntax:\r | |
1213 | EXTNDW[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1214 | \r | |
1215 | @param VmPtr A pointer to a VM context.\r | |
1216 | @param Op1 Operand 1 from the instruction\r | |
1217 | @param Op2 Operand 2 from the instruction\r | |
1218 | \r | |
1219 | @return (INT64)(INT16)Op2\r | |
1220 | \r | |
1221 | **/\r | |
53c71d09 | 1222 | UINT64\r |
1223 | ExecuteEXTNDW (\r | |
ea7cb08c | 1224 | IN VM_CONTEXT *VmPtr,\r |
1225 | IN UINT64 Op1,\r | |
1226 | IN UINT64 Op2\r | |
53c71d09 | 1227 | );\r |
1228 | \r | |
8e3bc754 | 1229 | /**\r |
1230 | Execute the EBC EXTNDD instruction to sign-extend a 32-bit value.\r | |
1231 | \r | |
1232 | Instruction syntax:\r | |
1233 | EXTNDD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
1234 | \r | |
1235 | @param VmPtr A pointer to a VM context.\r | |
1236 | @param Op1 Operand 1 from the instruction\r | |
1237 | @param Op2 Operand 2 from the instruction\r | |
1238 | \r | |
1239 | @return (INT64)(INT32)Op2\r | |
1240 | \r | |
1241 | **/\r | |
53c71d09 | 1242 | UINT64\r |
1243 | ExecuteEXTNDD (\r | |
ea7cb08c | 1244 | IN VM_CONTEXT *VmPtr,\r |
1245 | IN UINT64 Op1,\r | |
1246 | IN UINT64 Op2\r | |
53c71d09 | 1247 | );\r |
1248 | \r | |
1249 | //\r | |
1250 | // Once we retrieve the operands for the data manipulation instructions,\r | |
1251 | // call these functions to perform the operation.\r | |
1252 | //\r | |
34e4e297 | 1253 | CONST DATA_MANIP_EXEC_FUNCTION mDataManipDispatchTable[] = {\r |
53c71d09 | 1254 | ExecuteNOT,\r |
1255 | ExecuteNEG,\r | |
1256 | ExecuteADD,\r | |
1257 | ExecuteSUB,\r | |
1258 | ExecuteMUL,\r | |
1259 | ExecuteMULU,\r | |
1260 | ExecuteDIV,\r | |
1261 | ExecuteDIVU,\r | |
1262 | ExecuteMOD,\r | |
1263 | ExecuteMODU,\r | |
1264 | ExecuteAND,\r | |
1265 | ExecuteOR,\r | |
1266 | ExecuteXOR,\r | |
1267 | ExecuteSHL,\r | |
1268 | ExecuteSHR,\r | |
1269 | ExecuteASHR,\r | |
1270 | ExecuteEXTNDB,\r | |
1271 | ExecuteEXTNDW,\r | |
1272 | ExecuteEXTNDD,\r | |
1273 | };\r | |
1274 | \r | |
34e4e297 | 1275 | CONST VM_TABLE_ENTRY mVmOpcodeTable[] = {\r |
53c71d09 | 1276 | { ExecuteBREAK }, // opcode 0x00\r |
1277 | { ExecuteJMP }, // opcode 0x01\r | |
1278 | { ExecuteJMP8 }, // opcode 0x02\r | |
1279 | { ExecuteCALL }, // opcode 0x03\r | |
1280 | { ExecuteRET }, // opcode 0x04\r | |
1281 | { ExecuteCMP }, // opcode 0x05 CMPeq\r | |
1282 | { ExecuteCMP }, // opcode 0x06 CMPlte\r | |
1283 | { ExecuteCMP }, // opcode 0x07 CMPgte\r | |
1284 | { ExecuteCMP }, // opcode 0x08 CMPulte\r | |
1285 | { ExecuteCMP }, // opcode 0x09 CMPugte\r | |
1286 | { ExecuteUnsignedDataManip }, // opcode 0x0A NOT\r | |
1287 | { ExecuteSignedDataManip }, // opcode 0x0B NEG\r | |
1288 | { ExecuteSignedDataManip }, // opcode 0x0C ADD\r | |
1289 | { ExecuteSignedDataManip }, // opcode 0x0D SUB\r | |
1290 | { ExecuteSignedDataManip }, // opcode 0x0E MUL\r | |
1291 | { ExecuteUnsignedDataManip }, // opcode 0x0F MULU\r | |
1292 | { ExecuteSignedDataManip }, // opcode 0x10 DIV\r | |
1293 | { ExecuteUnsignedDataManip }, // opcode 0x11 DIVU\r | |
1294 | { ExecuteSignedDataManip }, // opcode 0x12 MOD\r | |
1295 | { ExecuteUnsignedDataManip }, // opcode 0x13 MODU\r | |
1296 | { ExecuteUnsignedDataManip }, // opcode 0x14 AND\r | |
1297 | { ExecuteUnsignedDataManip }, // opcode 0x15 OR\r | |
1298 | { ExecuteUnsignedDataManip }, // opcode 0x16 XOR\r | |
1299 | { ExecuteUnsignedDataManip }, // opcode 0x17 SHL\r | |
1300 | { ExecuteUnsignedDataManip }, // opcode 0x18 SHR\r | |
1301 | { ExecuteSignedDataManip }, // opcode 0x19 ASHR\r | |
1302 | { ExecuteUnsignedDataManip }, // opcode 0x1A EXTNDB\r | |
1303 | { ExecuteUnsignedDataManip }, // opcode 0x1B EXTNDW\r | |
1304 | { ExecuteUnsignedDataManip }, // opcode 0x1C EXTNDD\r | |
1305 | { ExecuteMOVxx }, // opcode 0x1D MOVBW\r | |
1306 | { ExecuteMOVxx }, // opcode 0x1E MOVWW\r | |
1307 | { ExecuteMOVxx }, // opcode 0x1F MOVDW\r | |
1308 | { ExecuteMOVxx }, // opcode 0x20 MOVQW\r | |
1309 | { ExecuteMOVxx }, // opcode 0x21 MOVBD\r | |
1310 | { ExecuteMOVxx }, // opcode 0x22 MOVWD\r | |
1311 | { ExecuteMOVxx }, // opcode 0x23 MOVDD\r | |
1312 | { ExecuteMOVxx }, // opcode 0x24 MOVQD\r | |
1313 | { ExecuteMOVsnw }, // opcode 0x25 MOVsnw\r | |
1314 | { ExecuteMOVsnd }, // opcode 0x26 MOVsnd\r | |
1315 | { NULL }, // opcode 0x27\r | |
1316 | { ExecuteMOVxx }, // opcode 0x28 MOVqq\r | |
1317 | { ExecuteLOADSP }, // opcode 0x29 LOADSP SP1, R2\r | |
1318 | { ExecuteSTORESP }, // opcode 0x2A STORESP R1, SP2\r | |
1319 | { ExecutePUSH }, // opcode 0x2B PUSH {@}R1 [imm16]\r | |
1320 | { ExecutePOP }, // opcode 0x2C POP {@}R1 [imm16]\r | |
1321 | { ExecuteCMPI }, // opcode 0x2D CMPIEQ\r | |
1322 | { ExecuteCMPI }, // opcode 0x2E CMPILTE\r | |
1323 | { ExecuteCMPI }, // opcode 0x2F CMPIGTE\r | |
1324 | { ExecuteCMPI }, // opcode 0x30 CMPIULTE\r | |
1325 | { ExecuteCMPI }, // opcode 0x31 CMPIUGTE\r | |
1326 | { ExecuteMOVxx }, // opcode 0x32 MOVN\r | |
1327 | { ExecuteMOVxx }, // opcode 0x33 MOVND\r | |
1328 | { NULL }, // opcode 0x34\r | |
1329 | { ExecutePUSHn }, // opcode 0x35\r | |
1330 | { ExecutePOPn }, // opcode 0x36\r | |
1331 | { ExecuteMOVI }, // opcode 0x37 - mov immediate data\r | |
1332 | { ExecuteMOVIn }, // opcode 0x38 - mov immediate natural\r | |
ead7e7dc | 1333 | { ExecuteMOVREL }, // opcode 0x39 - move data relative to PC\r |
1334 | { NULL }, // opcode 0x3a\r | |
1335 | { NULL }, // opcode 0x3b \r | |
1336 | { NULL }, // opcode 0x3c \r | |
1337 | { NULL }, // opcode 0x3d \r | |
1338 | { NULL }, // opcode 0x3e \r | |
1339 | { NULL } // opcode 0x3f \r | |
53c71d09 | 1340 | };\r |
1341 | \r | |
1342 | //\r | |
1343 | // Length of JMP instructions, depending on upper two bits of opcode.\r | |
1344 | //\r | |
34e4e297 | 1345 | CONST UINT8 mJMPLen[] = { 2, 2, 6, 10 };\r |
53c71d09 | 1346 | \r |
fb0b259e | 1347 | /**\r |
53c71d09 | 1348 | Given a pointer to a new VM context, execute one or more instructions. This\r |
1349 | function is only used for test purposes via the EBC VM test protocol.\r | |
1350 | \r | |
8e3bc754 | 1351 | @param This A pointer to the EFI_EBC_VM_TEST_PROTOCOL structure.\r |
1352 | @param VmPtr A pointer to a VM context.\r | |
1353 | @param InstructionCount A pointer to a UINTN value holding the number of\r | |
1354 | instructions to execute. If it holds value of 0,\r | |
1355 | then the instruction to be executed is 1.\r | |
53c71d09 | 1356 | \r |
8e3bc754 | 1357 | @retval EFI_UNSUPPORTED At least one of the opcodes is not supported.\r |
1358 | @retval EFI_SUCCESS All of the instructions are executed successfully.\r | |
53c71d09 | 1359 | \r |
fb0b259e | 1360 | **/\r |
1361 | EFI_STATUS\r | |
c8ad2d7a | 1362 | EFIAPI\r |
fb0b259e | 1363 | EbcExecuteInstructions (\r |
1364 | IN EFI_EBC_VM_TEST_PROTOCOL *This,\r | |
1365 | IN VM_CONTEXT *VmPtr,\r | |
1366 | IN OUT UINTN *InstructionCount\r | |
1367 | )\r | |
53c71d09 | 1368 | {\r |
1369 | UINTN ExecFunc;\r | |
1370 | EFI_STATUS Status;\r | |
1371 | UINTN InstructionsLeft;\r | |
1372 | UINTN SavedInstructionCount;\r | |
1373 | \r | |
1374 | Status = EFI_SUCCESS;\r | |
1375 | \r | |
1376 | if (*InstructionCount == 0) {\r | |
1377 | InstructionsLeft = 1;\r | |
1378 | } else {\r | |
1379 | InstructionsLeft = *InstructionCount;\r | |
1380 | }\r | |
1381 | \r | |
1382 | SavedInstructionCount = *InstructionCount;\r | |
1383 | *InstructionCount = 0;\r | |
1384 | \r | |
1385 | //\r | |
1386 | // Index into the opcode table using the opcode byte for this instruction.\r | |
1387 | // This gives you the execute function, which we first test for null, then\r | |
1388 | // call it if it's not null.\r | |
1389 | //\r | |
1390 | while (InstructionsLeft != 0) {\r | |
ead7e7dc | 1391 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction;\r |
53c71d09 | 1392 | if (ExecFunc == (UINTN) NULL) {\r |
1393 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1394 | return EFI_UNSUPPORTED;\r | |
1395 | } else {\r | |
ead7e7dc | 1396 | mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction (VmPtr);\r |
53c71d09 | 1397 | *InstructionCount = *InstructionCount + 1;\r |
1398 | }\r | |
1399 | \r | |
1400 | //\r | |
1401 | // Decrement counter if applicable\r | |
1402 | //\r | |
1403 | if (SavedInstructionCount != 0) {\r | |
1404 | InstructionsLeft--;\r | |
1405 | }\r | |
1406 | }\r | |
1407 | \r | |
1408 | return Status;\r | |
1409 | }\r | |
1410 | \r | |
53c71d09 | 1411 | \r |
fb0b259e | 1412 | /**\r |
53c71d09 | 1413 | Execute an EBC image from an entry point or from a published protocol.\r |
1414 | \r | |
8e3bc754 | 1415 | @param VmPtr A pointer to a VM context.\r |
53c71d09 | 1416 | \r |
8e3bc754 | 1417 | @retval EFI_UNSUPPORTED At least one of the opcodes is not supported.\r |
1418 | @retval EFI_SUCCESS All of the instructions are executed successfully.\r | |
53c71d09 | 1419 | \r |
fb0b259e | 1420 | **/\r |
1421 | EFI_STATUS\r | |
1422 | EbcExecute (\r | |
1423 | IN VM_CONTEXT *VmPtr\r | |
1424 | )\r | |
53c71d09 | 1425 | {\r |
1426 | UINTN ExecFunc;\r | |
1427 | UINT8 StackCorrupted;\r | |
1428 | EFI_STATUS Status;\r | |
1429 | EFI_EBC_SIMPLE_DEBUGGER_PROTOCOL *EbcSimpleDebugger;\r | |
1430 | \r | |
1431 | mVmPtr = VmPtr;\r | |
1432 | EbcSimpleDebugger = NULL;\r | |
1433 | Status = EFI_SUCCESS;\r | |
1434 | StackCorrupted = 0;\r | |
1435 | \r | |
1436 | //\r | |
1437 | // Make sure the magic value has been put on the stack before we got here.\r | |
1438 | //\r | |
1439 | if (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE) {\r | |
1440 | StackCorrupted = 1;\r | |
1441 | }\r | |
1442 | \r | |
1ccdbf2a | 1443 | VmPtr->FramePtr = (VOID *) ((UINT8 *) (UINTN) VmPtr->Gpr[0] + 8);\r |
53c71d09 | 1444 | \r |
1445 | //\r | |
1446 | // Try to get the debug support for EBC\r | |
1447 | //\r | |
1448 | DEBUG_CODE_BEGIN ();\r | |
1449 | Status = gBS->LocateProtocol (\r | |
c8ad2d7a | 1450 | &gEfiEbcSimpleDebuggerProtocolGuid,\r |
53c71d09 | 1451 | NULL,\r |
1452 | (VOID **) &EbcSimpleDebugger\r | |
1453 | );\r | |
1454 | if (EFI_ERROR (Status)) {\r | |
1455 | EbcSimpleDebugger = NULL;\r | |
1456 | }\r | |
1457 | DEBUG_CODE_END ();\r | |
1458 | \r | |
1459 | //\r | |
1460 | // Save the start IP for debug. For example, if we take an exception we\r | |
1461 | // can print out the location of the exception relative to the entry point,\r | |
1462 | // which could then be used in a disassembly listing to find the problem.\r | |
1463 | //\r | |
1464 | VmPtr->EntryPoint = (VOID *) VmPtr->Ip;\r | |
1465 | \r | |
1466 | //\r | |
1467 | // We'll wait for this flag to know when we're done. The RET\r | |
1468 | // instruction sets it if it runs out of stack.\r | |
1469 | //\r | |
1470 | VmPtr->StopFlags = 0;\r | |
366219ab | 1471 | while ((VmPtr->StopFlags & STOPFLAG_APP_DONE) == 0) {\r |
53c71d09 | 1472 | //\r |
1473 | // If we've found a simple debugger protocol, call it\r | |
1474 | //\r | |
1475 | DEBUG_CODE_BEGIN ();\r | |
1476 | if (EbcSimpleDebugger != NULL) {\r | |
1477 | EbcSimpleDebugger->Debugger (EbcSimpleDebugger, VmPtr);\r | |
1478 | }\r | |
1479 | DEBUG_CODE_END ();\r | |
1480 | \r | |
53c71d09 | 1481 | //\r |
1482 | // Use the opcode bits to index into the opcode dispatch table. If the\r | |
1483 | // function pointer is null then generate an exception.\r | |
1484 | //\r | |
1485 | ExecFunc = (UINTN) mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction;\r | |
1486 | if (ExecFunc == (UINTN) NULL) {\r | |
1487 | EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1488 | Status = EFI_UNSUPPORTED;\r | |
1489 | goto Done;\r | |
1490 | }\r | |
1491 | //\r | |
1492 | // The EBC VM is a strongly ordered processor, so perform a fence operation before\r | |
1493 | // and after each instruction is executed.\r | |
1494 | //\r | |
1495 | MemoryFence ();\r | |
1496 | \r | |
1497 | mVmOpcodeTable[(*VmPtr->Ip & OPCODE_M_OPCODE)].ExecuteFunction (VmPtr);\r | |
1498 | \r | |
1499 | MemoryFence ();\r | |
1500 | \r | |
1501 | //\r | |
1502 | // If the step flag is set, signal an exception and continue. We don't\r | |
1503 | // clear it here. Assuming the debugger is responsible for clearing it.\r | |
1504 | //\r | |
1505 | if (VMFLAG_ISSET (VmPtr, VMFLAGS_STEP)) {\r | |
1506 | EbcDebugSignalException (EXCEPT_EBC_STEP, EXCEPTION_FLAG_NONE, VmPtr);\r | |
1507 | }\r | |
1508 | //\r | |
1509 | // Make sure stack has not been corrupted. Only report it once though.\r | |
1510 | //\r | |
366219ab | 1511 | if ((StackCorrupted == 0) && (*VmPtr->StackMagicPtr != (UINTN) VM_STACK_KEY_VALUE)) {\r |
53c71d09 | 1512 | EbcDebugSignalException (EXCEPT_EBC_STACK_FAULT, EXCEPTION_FLAG_FATAL, VmPtr);\r |
1513 | StackCorrupted = 1;\r | |
1514 | }\r | |
1ccdbf2a | 1515 | if ((StackCorrupted == 0) && ((UINT64)VmPtr->Gpr[0] <= (UINT64)(UINTN) VmPtr->StackTop)) {\r |
53c71d09 | 1516 | EbcDebugSignalException (EXCEPT_EBC_STACK_FAULT, EXCEPTION_FLAG_FATAL, VmPtr);\r |
1517 | StackCorrupted = 1;\r | |
1518 | }\r | |
1519 | }\r | |
1520 | \r | |
1521 | Done:\r | |
1522 | mVmPtr = NULL;\r | |
1523 | \r | |
1524 | return Status;\r | |
1525 | }\r | |
1526 | \r | |
53c71d09 | 1527 | \r |
fb0b259e | 1528 | /**\r |
53c71d09 | 1529 | Execute the MOVxx instructions.\r |
1530 | \r | |
8e3bc754 | 1531 | Instruction format:\r |
34e4e297 | 1532 | \r |
8e3bc754 | 1533 | MOV[b|w|d|q|n]{w|d} {@}R1 {Index16|32}, {@}R2 {Index16|32}\r |
1534 | MOVqq {@}R1 {Index64}, {@}R2 {Index64}\r | |
34e4e297 | 1535 | \r |
8e3bc754 | 1536 | Copies contents of [R2] -> [R1], zero extending where required.\r |
34e4e297 | 1537 | \r |
8e3bc754 | 1538 | First character indicates the size of the move.\r |
1539 | Second character indicates the size of the index(s).\r | |
34e4e297 | 1540 | \r |
8e3bc754 | 1541 | Invalid to have R1 direct with index.\r |
1542 | \r | |
1543 | @param VmPtr A pointer to a VM context.\r | |
1544 | \r | |
1545 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
1546 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
53c71d09 | 1547 | \r |
fb0b259e | 1548 | **/\r |
fb0b259e | 1549 | EFI_STATUS\r |
1550 | ExecuteMOVxx (\r | |
1551 | IN VM_CONTEXT *VmPtr\r | |
1552 | )\r | |
53c71d09 | 1553 | {\r |
1554 | UINT8 Opcode;\r | |
1555 | UINT8 OpcMasked;\r | |
1556 | UINT8 Operands;\r | |
1557 | UINT8 Size;\r | |
1558 | UINT8 MoveSize;\r | |
1559 | INT16 Index16;\r | |
1560 | INT32 Index32;\r | |
1561 | INT64 Index64Op1;\r | |
1562 | INT64 Index64Op2;\r | |
1563 | UINT64 Data64;\r | |
1564 | UINT64 DataMask;\r | |
1565 | UINTN Source;\r | |
1566 | \r | |
1567 | Opcode = GETOPCODE (VmPtr);\r | |
1568 | OpcMasked = (UINT8) (Opcode & OPCODE_M_OPCODE);\r | |
1569 | \r | |
1570 | //\r | |
1571 | // Get the operands byte so we can get R1 and R2\r | |
1572 | //\r | |
1573 | Operands = GETOPERANDS (VmPtr);\r | |
1574 | \r | |
1575 | //\r | |
1576 | // Assume no indexes\r | |
1577 | //\r | |
1578 | Index64Op1 = 0;\r | |
1579 | Index64Op2 = 0;\r | |
1580 | Data64 = 0;\r | |
1581 | \r | |
1582 | //\r | |
1583 | // Determine if we have an index/immediate data. Base instruction size\r | |
1584 | // is 2 (opcode + operands). Add to this size each index specified.\r | |
1585 | //\r | |
1586 | Size = 2;\r | |
366219ab | 1587 | if ((Opcode & (OPCODE_M_IMMED_OP1 | OPCODE_M_IMMED_OP2)) != 0) {\r |
53c71d09 | 1588 | //\r |
1589 | // Determine size of the index from the opcode. Then get it.\r | |
1590 | //\r | |
1591 | if ((OpcMasked <= OPCODE_MOVQW) || (OpcMasked == OPCODE_MOVNW)) {\r | |
1592 | //\r | |
1593 | // MOVBW, MOVWW, MOVDW, MOVQW, and MOVNW have 16-bit immediate index.\r | |
1594 | // Get one or both index values.\r | |
1595 | //\r | |
366219ab | 1596 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r |
53c71d09 | 1597 | Index16 = VmReadIndex16 (VmPtr, 2);\r |
1598 | Index64Op1 = (INT64) Index16;\r | |
1599 | Size += sizeof (UINT16);\r | |
1600 | }\r | |
1601 | \r | |
366219ab | 1602 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r |
53c71d09 | 1603 | Index16 = VmReadIndex16 (VmPtr, Size);\r |
1604 | Index64Op2 = (INT64) Index16;\r | |
1605 | Size += sizeof (UINT16);\r | |
1606 | }\r | |
1607 | } else if ((OpcMasked <= OPCODE_MOVQD) || (OpcMasked == OPCODE_MOVND)) {\r | |
1608 | //\r | |
1609 | // MOVBD, MOVWD, MOVDD, MOVQD, and MOVND have 32-bit immediate index\r | |
1610 | //\r | |
366219ab | 1611 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r |
53c71d09 | 1612 | Index32 = VmReadIndex32 (VmPtr, 2);\r |
1613 | Index64Op1 = (INT64) Index32;\r | |
1614 | Size += sizeof (UINT32);\r | |
1615 | }\r | |
1616 | \r | |
366219ab | 1617 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r |
53c71d09 | 1618 | Index32 = VmReadIndex32 (VmPtr, Size);\r |
1619 | Index64Op2 = (INT64) Index32;\r | |
1620 | Size += sizeof (UINT32);\r | |
1621 | }\r | |
1622 | } else if (OpcMasked == OPCODE_MOVQQ) {\r | |
1623 | //\r | |
1624 | // MOVqq -- only form with a 64-bit index\r | |
1625 | //\r | |
366219ab | 1626 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r |
53c71d09 | 1627 | Index64Op1 = VmReadIndex64 (VmPtr, 2);\r |
1628 | Size += sizeof (UINT64);\r | |
1629 | }\r | |
1630 | \r | |
366219ab | 1631 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r |
53c71d09 | 1632 | Index64Op2 = VmReadIndex64 (VmPtr, Size);\r |
1633 | Size += sizeof (UINT64);\r | |
1634 | }\r | |
1635 | } else {\r | |
1636 | //\r | |
1637 | // Obsolete MOVBQ, MOVWQ, MOVDQ, and MOVNQ have 64-bit immediate index\r | |
1638 | //\r | |
1639 | EbcDebugSignalException (\r | |
1640 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1641 | EXCEPTION_FLAG_FATAL,\r | |
1642 | VmPtr\r | |
1643 | );\r | |
1644 | return EFI_UNSUPPORTED;\r | |
1645 | }\r | |
1646 | }\r | |
1647 | //\r | |
1648 | // Determine the size of the move, and create a mask for it so we can\r | |
1649 | // clear unused bits.\r | |
1650 | //\r | |
1651 | if ((OpcMasked == OPCODE_MOVBW) || (OpcMasked == OPCODE_MOVBD)) {\r | |
1652 | MoveSize = DATA_SIZE_8;\r | |
1653 | DataMask = 0xFF;\r | |
1654 | } else if ((OpcMasked == OPCODE_MOVWW) || (OpcMasked == OPCODE_MOVWD)) {\r | |
1655 | MoveSize = DATA_SIZE_16;\r | |
1656 | DataMask = 0xFFFF;\r | |
1657 | } else if ((OpcMasked == OPCODE_MOVDW) || (OpcMasked == OPCODE_MOVDD)) {\r | |
1658 | MoveSize = DATA_SIZE_32;\r | |
1659 | DataMask = 0xFFFFFFFF;\r | |
1660 | } else if ((OpcMasked == OPCODE_MOVQW) || (OpcMasked == OPCODE_MOVQD) || (OpcMasked == OPCODE_MOVQQ)) {\r | |
1661 | MoveSize = DATA_SIZE_64;\r | |
1662 | DataMask = (UINT64)~0;\r | |
1663 | } else if ((OpcMasked == OPCODE_MOVNW) || (OpcMasked == OPCODE_MOVND)) {\r | |
1664 | MoveSize = DATA_SIZE_N;\r | |
1665 | DataMask = (UINT64)~0 >> (64 - 8 * sizeof (UINTN));\r | |
1666 | } else {\r | |
1667 | //\r | |
1668 | // We were dispatched to this function and we don't recognize the opcode\r | |
1669 | //\r | |
1670 | EbcDebugSignalException (EXCEPT_EBC_UNDEFINED, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1671 | return EFI_UNSUPPORTED;\r | |
1672 | }\r | |
1673 | //\r | |
1674 | // Now get the source address\r | |
1675 | //\r | |
1676 | if (OPERAND2_INDIRECT (Operands)) {\r | |
1677 | //\r | |
1678 | // Indirect form @R2. Compute address of operand2\r | |
1679 | //\r | |
1ccdbf2a | 1680 | Source = (UINTN) (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index64Op2);\r |
53c71d09 | 1681 | //\r |
1682 | // Now get the data from the source. Always 0-extend and let the compiler\r | |
1683 | // sign-extend where required.\r | |
1684 | //\r | |
1685 | switch (MoveSize) {\r | |
1686 | case DATA_SIZE_8:\r | |
1687 | Data64 = (UINT64) (UINT8) VmReadMem8 (VmPtr, Source);\r | |
1688 | break;\r | |
1689 | \r | |
1690 | case DATA_SIZE_16:\r | |
1691 | Data64 = (UINT64) (UINT16) VmReadMem16 (VmPtr, Source);\r | |
1692 | break;\r | |
1693 | \r | |
1694 | case DATA_SIZE_32:\r | |
1695 | Data64 = (UINT64) (UINT32) VmReadMem32 (VmPtr, Source);\r | |
1696 | break;\r | |
1697 | \r | |
1698 | case DATA_SIZE_64:\r | |
1699 | Data64 = (UINT64) VmReadMem64 (VmPtr, Source);\r | |
1700 | break;\r | |
1701 | \r | |
1702 | case DATA_SIZE_N:\r | |
1703 | Data64 = (UINT64) (UINTN) VmReadMemN (VmPtr, Source);\r | |
1704 | break;\r | |
1705 | \r | |
1706 | default:\r | |
1707 | //\r | |
1708 | // not reached\r | |
1709 | //\r | |
1710 | break;\r | |
1711 | }\r | |
1712 | } else {\r | |
1713 | //\r | |
1714 | // Not indirect source: MOVxx {@}Rx, Ry [Index]\r | |
1715 | //\r | |
c9325700 | 1716 | Data64 = (UINT64) (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index64Op2);\r |
53c71d09 | 1717 | //\r |
1718 | // Did Operand2 have an index? If so, treat as two signed values since\r | |
1719 | // indexes are signed values.\r | |
1720 | //\r | |
366219ab | 1721 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r |
53c71d09 | 1722 | //\r |
1723 | // NOTE: need to find a way to fix this, most likely by changing the VM\r | |
1724 | // implementation to remove the stack gap. To do that, we'd need to\r | |
1725 | // allocate stack space for the VM and actually set the system\r | |
1726 | // stack pointer to the allocated buffer when the VM starts.\r | |
1727 | //\r | |
1728 | // Special case -- if someone took the address of a function parameter\r | |
1729 | // then we need to make sure it's not in the stack gap. We can identify\r | |
1730 | // this situation if (Operand2 register == 0) && (Operand2 is direct)\r | |
1731 | // && (Index applies to Operand2) && (Index > 0) && (Operand1 register != 0)\r | |
1732 | // Situations that to be aware of:\r | |
1733 | // * stack adjustments at beginning and end of functions R0 = R0 += stacksize\r | |
1734 | //\r | |
1735 | if ((OPERAND2_REGNUM (Operands) == 0) &&\r | |
1736 | (!OPERAND2_INDIRECT (Operands)) &&\r | |
1737 | (Index64Op2 > 0) &&\r | |
1738 | (OPERAND1_REGNUM (Operands) == 0) &&\r | |
1739 | (OPERAND1_INDIRECT (Operands))\r | |
1740 | ) {\r | |
1741 | Data64 = (UINT64) ConvertStackAddr (VmPtr, (UINTN) (INT64) Data64);\r | |
1742 | }\r | |
1743 | }\r | |
1744 | }\r | |
1745 | //\r | |
1746 | // Now write it back\r | |
1747 | //\r | |
1748 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1749 | //\r | |
1750 | // Reuse the Source variable to now be dest.\r | |
1751 | //\r | |
1ccdbf2a | 1752 | Source = (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index64Op1);\r |
53c71d09 | 1753 | //\r |
1754 | // Do the write based on the size\r | |
1755 | //\r | |
1756 | switch (MoveSize) {\r | |
1757 | case DATA_SIZE_8:\r | |
1758 | VmWriteMem8 (VmPtr, Source, (UINT8) Data64);\r | |
1759 | break;\r | |
1760 | \r | |
1761 | case DATA_SIZE_16:\r | |
1762 | VmWriteMem16 (VmPtr, Source, (UINT16) Data64);\r | |
1763 | break;\r | |
1764 | \r | |
1765 | case DATA_SIZE_32:\r | |
1766 | VmWriteMem32 (VmPtr, Source, (UINT32) Data64);\r | |
1767 | break;\r | |
1768 | \r | |
1769 | case DATA_SIZE_64:\r | |
1770 | VmWriteMem64 (VmPtr, Source, Data64);\r | |
1771 | break;\r | |
1772 | \r | |
1773 | case DATA_SIZE_N:\r | |
1774 | VmWriteMemN (VmPtr, Source, (UINTN) Data64);\r | |
1775 | break;\r | |
1776 | \r | |
1777 | default:\r | |
1778 | //\r | |
1779 | // not reached\r | |
1780 | //\r | |
1781 | break;\r | |
1782 | }\r | |
1783 | } else {\r | |
1784 | //\r | |
1785 | // Operand1 direct.\r | |
1786 | // Make sure we didn't have an index on operand1.\r | |
1787 | //\r | |
366219ab | 1788 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r |
53c71d09 | 1789 | EbcDebugSignalException (\r |
1790 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1791 | EXCEPTION_FLAG_FATAL,\r | |
1792 | VmPtr\r | |
1793 | );\r | |
1794 | return EFI_UNSUPPORTED;\r | |
1795 | }\r | |
1796 | //\r | |
1797 | // Direct storage in register. Clear unused bits and store back to\r | |
1798 | // register.\r | |
1799 | //\r | |
1ccdbf2a | 1800 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Data64 & DataMask;\r |
53c71d09 | 1801 | }\r |
1802 | //\r | |
1803 | // Advance the instruction pointer\r | |
1804 | //\r | |
1805 | VmPtr->Ip += Size;\r | |
1806 | return EFI_SUCCESS;\r | |
1807 | }\r | |
1808 | \r | |
53c71d09 | 1809 | \r |
fb0b259e | 1810 | /**\r |
8e3bc754 | 1811 | Execute the EBC BREAK instruction.\r |
53c71d09 | 1812 | \r |
8e3bc754 | 1813 | @param VmPtr A pointer to a VM context.\r |
53c71d09 | 1814 | \r |
8e3bc754 | 1815 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 1816 | \r |
fb0b259e | 1817 | **/\r |
fb0b259e | 1818 | EFI_STATUS\r |
1819 | ExecuteBREAK (\r | |
1820 | IN VM_CONTEXT *VmPtr\r | |
1821 | )\r | |
53c71d09 | 1822 | {\r |
e618d0cb | 1823 | EFI_STATUS Status;\r |
53c71d09 | 1824 | UINT8 Operands;\r |
1825 | VOID *EbcEntryPoint;\r | |
1826 | VOID *Thunk;\r | |
1827 | UINT64 U64EbcEntryPoint;\r | |
1828 | INT32 Offset;\r | |
1829 | \r | |
1830 | Operands = GETOPERANDS (VmPtr);\r | |
1831 | switch (Operands) {\r | |
1832 | //\r | |
1833 | // Runaway program break. Generate an exception and terminate\r | |
1834 | //\r | |
1835 | case 0:\r | |
1836 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1837 | break;\r | |
1838 | \r | |
1839 | //\r | |
1840 | // Get VM version -- return VM revision number in R7\r | |
1841 | //\r | |
1842 | case 1:\r | |
1843 | //\r | |
1844 | // Bits:\r | |
1845 | // 63-17 = 0\r | |
1846 | // 16-8 = Major version\r | |
1847 | // 7-0 = Minor version\r | |
1848 | //\r | |
1ccdbf2a | 1849 | VmPtr->Gpr[7] = GetVmVersion ();\r |
53c71d09 | 1850 | break;\r |
1851 | \r | |
1852 | //\r | |
1853 | // Debugger breakpoint\r | |
1854 | //\r | |
1855 | case 3:\r | |
1856 | VmPtr->StopFlags |= STOPFLAG_BREAKPOINT;\r | |
1857 | //\r | |
1858 | // See if someone has registered a handler\r | |
1859 | //\r | |
1860 | EbcDebugSignalException (\r | |
1861 | EXCEPT_EBC_BREAKPOINT,\r | |
1862 | EXCEPTION_FLAG_NONE,\r | |
1863 | VmPtr\r | |
1864 | );\r | |
1865 | break;\r | |
1866 | \r | |
1867 | //\r | |
1868 | // System call, which there are none, so NOP it.\r | |
1869 | //\r | |
1870 | case 4:\r | |
1871 | break;\r | |
1872 | \r | |
1873 | //\r | |
1874 | // Create a thunk for EBC code. R7 points to a 32-bit (in a 64-bit slot)\r | |
1875 | // "offset from self" pointer to the EBC entry point.\r | |
1876 | // After we're done, *(UINT64 *)R7 will be the address of the new thunk.\r | |
1877 | //\r | |
1878 | case 5:\r | |
1ccdbf2a | 1879 | Offset = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->Gpr[7]);\r |
1880 | U64EbcEntryPoint = (UINT64) (VmPtr->Gpr[7] + Offset + 4);\r | |
53c71d09 | 1881 | EbcEntryPoint = (VOID *) (UINTN) U64EbcEntryPoint;\r |
1882 | \r | |
1883 | //\r | |
1884 | // Now create a new thunk\r | |
1885 | //\r | |
e618d0cb | 1886 | Status = EbcCreateThunks (VmPtr->ImageHandle, EbcEntryPoint, &Thunk, 0);\r |
1887 | if (EFI_ERROR (Status)) {\r | |
1888 | return Status;\r | |
1889 | }\r | |
53c71d09 | 1890 | \r |
1891 | //\r | |
1892 | // Finally replace the EBC entry point memory with the thunk address\r | |
1893 | //\r | |
1ccdbf2a | 1894 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[7], (UINT64) (UINTN) Thunk);\r |
53c71d09 | 1895 | break;\r |
1896 | \r | |
1897 | //\r | |
1898 | // Compiler setting version per value in R7\r | |
1899 | //\r | |
1900 | case 6:\r | |
1ccdbf2a | 1901 | VmPtr->CompilerVersion = (UINT32) VmPtr->Gpr[7];\r |
53c71d09 | 1902 | //\r |
1903 | // Check compiler version against VM version?\r | |
1904 | //\r | |
1905 | break;\r | |
1906 | \r | |
1907 | //\r | |
1908 | // Unhandled break code. Signal exception.\r | |
1909 | //\r | |
1910 | default:\r | |
1911 | EbcDebugSignalException (EXCEPT_EBC_BAD_BREAK, EXCEPTION_FLAG_FATAL, VmPtr);\r | |
1912 | break;\r | |
1913 | }\r | |
1914 | //\r | |
1915 | // Advance IP\r | |
1916 | //\r | |
1917 | VmPtr->Ip += 2;\r | |
1918 | return EFI_SUCCESS;\r | |
1919 | }\r | |
1920 | \r | |
fb0b259e | 1921 | \r |
1922 | /**\r | |
8e3bc754 | 1923 | Execute the JMP instruction.\r |
1924 | \r | |
1925 | Instruction syntax:\r | |
1926 | JMP64{cs|cc} Immed64\r | |
1927 | JMP32{cs|cc} {@}R1 {Immed32|Index32}\r | |
34e4e297 | 1928 | \r |
8e3bc754 | 1929 | Encoding:\r |
1930 | b0.7 - immediate data present\r | |
1931 | b0.6 - 1 = 64 bit immediate data\r | |
1932 | 0 = 32 bit immediate data\r | |
1933 | b1.7 - 1 = conditional\r | |
1934 | b1.6 1 = CS (condition set)\r | |
1935 | 0 = CC (condition clear)\r | |
1936 | b1.4 1 = relative address\r | |
1937 | 0 = absolute address\r | |
1938 | b1.3 1 = operand1 indirect\r | |
1939 | b1.2-0 operand 1\r | |
1940 | \r | |
1941 | @param VmPtr A pointer to a VM context.\r | |
1942 | \r | |
1943 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r | |
1944 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
fb0b259e | 1945 | \r |
1946 | **/\r | |
53c71d09 | 1947 | EFI_STATUS\r |
1948 | ExecuteJMP (\r | |
1949 | IN VM_CONTEXT *VmPtr\r | |
1950 | )\r | |
53c71d09 | 1951 | {\r |
1952 | UINT8 Opcode;\r | |
1953 | UINT8 CompareSet;\r | |
1954 | UINT8 ConditionFlag;\r | |
1955 | UINT8 Size;\r | |
1956 | UINT8 Operand;\r | |
1957 | UINT64 Data64;\r | |
1958 | INT32 Index32;\r | |
1959 | UINTN Addr;\r | |
1960 | \r | |
1961 | Operand = GETOPERANDS (VmPtr);\r | |
1962 | Opcode = GETOPCODE (VmPtr);\r | |
1963 | \r | |
1964 | //\r | |
1965 | // Get instruction length from the opcode. The upper two bits are used here\r | |
1966 | // to index into the length array.\r | |
1967 | //\r | |
1968 | Size = mJMPLen[(Opcode >> 6) & 0x03];\r | |
1969 | \r | |
1970 | //\r | |
1971 | // Decode instruction conditions\r | |
1972 | // If we haven't met the condition, then simply advance the IP and return.\r | |
1973 | //\r | |
366219ab | 1974 | CompareSet = (UINT8) (((Operand & JMP_M_CS) != 0) ? 1 : 0);\r |
53c71d09 | 1975 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r |
366219ab | 1976 | if ((Operand & CONDITION_M_CONDITIONAL) != 0) {\r |
53c71d09 | 1977 | if (CompareSet != ConditionFlag) {\r |
1978 | VmPtr->Ip += Size;\r | |
1979 | return EFI_SUCCESS;\r | |
1980 | }\r | |
1981 | }\r | |
1982 | //\r | |
1983 | // Check for 64-bit form and do it right away since it's the most\r | |
1984 | // straight-forward form.\r | |
1985 | //\r | |
366219ab | 1986 | if ((Opcode & OPCODE_M_IMMDATA64) != 0) {\r |
53c71d09 | 1987 | //\r |
1988 | // Double check for immediate-data, which is required. If not there,\r | |
1989 | // then signal an exception\r | |
1990 | //\r | |
366219ab | 1991 | if ((Opcode & OPCODE_M_IMMDATA) == 0) {\r |
53c71d09 | 1992 | EbcDebugSignalException (\r |
1993 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
1994 | EXCEPTION_FLAG_ERROR,\r | |
1995 | VmPtr\r | |
1996 | );\r | |
1997 | return EFI_UNSUPPORTED;\r | |
1998 | }\r | |
1999 | //\r | |
2000 | // 64-bit immediate data is full address. Read the immediate data,\r | |
2001 | // check for alignment, and jump absolute.\r | |
2002 | //\r | |
c9325700 | 2003 | Data64 = (UINT64) VmReadImmed64 (VmPtr, 2);\r |
53c71d09 | 2004 | if (!IS_ALIGNED ((UINTN) Data64, sizeof (UINT16))) {\r |
2005 | EbcDebugSignalException (\r | |
2006 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2007 | EXCEPTION_FLAG_FATAL,\r | |
2008 | VmPtr\r | |
2009 | );\r | |
2010 | \r | |
2011 | return EFI_UNSUPPORTED;\r | |
2012 | }\r | |
2013 | \r | |
2014 | //\r | |
2015 | // Take jump -- relative or absolute\r | |
2016 | //\r | |
366219ab | 2017 | if ((Operand & JMP_M_RELATIVE) != 0) {\r |
53c71d09 | 2018 | VmPtr->Ip += (UINTN) Data64 + Size;\r |
2019 | } else {\r | |
2020 | VmPtr->Ip = (VMIP) (UINTN) Data64;\r | |
2021 | }\r | |
2022 | \r | |
2023 | return EFI_SUCCESS;\r | |
2024 | }\r | |
2025 | //\r | |
2026 | // 32-bit forms:\r | |
2027 | // Get the index if there is one. May be either an index, or an immediate\r | |
2028 | // offset depending on indirect operand.\r | |
2029 | // JMP32 @R1 Index32 -- immediate data is an index\r | |
2030 | // JMP32 R1 Immed32 -- immedate data is an offset\r | |
2031 | //\r | |
366219ab | 2032 | if ((Opcode & OPCODE_M_IMMDATA) != 0) {\r |
53c71d09 | 2033 | if (OPERAND1_INDIRECT (Operand)) {\r |
2034 | Index32 = VmReadIndex32 (VmPtr, 2);\r | |
2035 | } else {\r | |
2036 | Index32 = VmReadImmed32 (VmPtr, 2);\r | |
2037 | }\r | |
2038 | } else {\r | |
2039 | Index32 = 0;\r | |
2040 | }\r | |
2041 | //\r | |
2042 | // Get the register data. If R == 0, then special case where it's ignored.\r | |
2043 | //\r | |
2044 | if (OPERAND1_REGNUM (Operand) == 0) {\r | |
2045 | Data64 = 0;\r | |
2046 | } else {\r | |
c9325700 | 2047 | Data64 = (UINT64) OPERAND1_REGDATA (VmPtr, Operand);\r |
53c71d09 | 2048 | }\r |
2049 | //\r | |
2050 | // Decode the forms\r | |
2051 | //\r | |
2052 | if (OPERAND1_INDIRECT (Operand)) {\r | |
2053 | //\r | |
2054 | // Form: JMP32 @Rx {Index32}\r | |
2055 | //\r | |
2056 | Addr = VmReadMemN (VmPtr, (UINTN) Data64 + Index32);\r | |
2057 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
2058 | EbcDebugSignalException (\r | |
2059 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2060 | EXCEPTION_FLAG_FATAL,\r | |
2061 | VmPtr\r | |
2062 | );\r | |
2063 | \r | |
2064 | return EFI_UNSUPPORTED;\r | |
2065 | }\r | |
2066 | \r | |
366219ab | 2067 | if ((Operand & JMP_M_RELATIVE) != 0) {\r |
53c71d09 | 2068 | VmPtr->Ip += (UINTN) Addr + Size;\r |
2069 | } else {\r | |
2070 | VmPtr->Ip = (VMIP) Addr;\r | |
2071 | }\r | |
2072 | } else {\r | |
2073 | //\r | |
2074 | // Form: JMP32 Rx {Immed32}\r | |
2075 | //\r | |
2076 | Addr = (UINTN) (Data64 + Index32);\r | |
2077 | if (!IS_ALIGNED ((UINTN) Addr, sizeof (UINT16))) {\r | |
2078 | EbcDebugSignalException (\r | |
2079 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
2080 | EXCEPTION_FLAG_FATAL,\r | |
2081 | VmPtr\r | |
2082 | );\r | |
2083 | \r | |
2084 | return EFI_UNSUPPORTED;\r | |
2085 | }\r | |
2086 | \r | |
366219ab | 2087 | if ((Operand & JMP_M_RELATIVE) != 0) {\r |
53c71d09 | 2088 | VmPtr->Ip += (UINTN) Addr + Size;\r |
2089 | } else {\r | |
2090 | VmPtr->Ip = (VMIP) Addr;\r | |
2091 | }\r | |
2092 | }\r | |
2093 | \r | |
2094 | return EFI_SUCCESS;\r | |
2095 | }\r | |
2096 | \r | |
53c71d09 | 2097 | \r |
fb0b259e | 2098 | /**\r |
8e3bc754 | 2099 | Execute the EBC JMP8 instruction.\r |
53c71d09 | 2100 | \r |
8e3bc754 | 2101 | Instruction syntax:\r |
2102 | JMP8{cs|cc} Offset/2\r | |
53c71d09 | 2103 | \r |
8e3bc754 | 2104 | @param VmPtr A pointer to a VM context.\r |
2105 | \r | |
2106 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
53c71d09 | 2107 | \r |
fb0b259e | 2108 | **/\r |
fb0b259e | 2109 | EFI_STATUS\r |
2110 | ExecuteJMP8 (\r | |
2111 | IN VM_CONTEXT *VmPtr\r | |
2112 | )\r | |
53c71d09 | 2113 | {\r |
2114 | UINT8 Opcode;\r | |
2115 | UINT8 ConditionFlag;\r | |
2116 | UINT8 CompareSet;\r | |
2117 | INT8 Offset;\r | |
2118 | \r | |
2119 | //\r | |
2120 | // Decode instruction.\r | |
2121 | //\r | |
2122 | Opcode = GETOPCODE (VmPtr);\r | |
366219ab | 2123 | CompareSet = (UINT8) (((Opcode & JMP_M_CS) != 0) ? 1 : 0);\r |
53c71d09 | 2124 | ConditionFlag = (UINT8) VMFLAG_ISSET (VmPtr, VMFLAGS_CC);\r |
2125 | \r | |
2126 | //\r | |
2127 | // If we haven't met the condition, then simply advance the IP and return\r | |
2128 | //\r | |
366219ab | 2129 | if ((Opcode & CONDITION_M_CONDITIONAL) != 0) {\r |
53c71d09 | 2130 | if (CompareSet != ConditionFlag) {\r |
2131 | VmPtr->Ip += 2;\r | |
2132 | return EFI_SUCCESS;\r | |
2133 | }\r | |
2134 | }\r | |
2135 | //\r | |
2136 | // Get the offset from the instruction stream. It's relative to the\r | |
2137 | // following instruction, and divided by 2.\r | |
2138 | //\r | |
2139 | Offset = VmReadImmed8 (VmPtr, 1);\r | |
2140 | //\r | |
2141 | // Want to check for offset == -2 and then raise an exception?\r | |
2142 | //\r | |
2143 | VmPtr->Ip += (Offset * 2) + 2;\r | |
2144 | return EFI_SUCCESS;\r | |
2145 | }\r | |
2146 | \r | |
fb0b259e | 2147 | \r |
2148 | /**\r | |
8e3bc754 | 2149 | Execute the EBC MOVI.\r |
2150 | \r | |
2151 | Instruction syntax:\r | |
34e4e297 | 2152 | \r |
8e3bc754 | 2153 | MOVI[b|w|d|q][w|d|q] {@}R1 {Index16}, ImmData16|32|64\r |
34e4e297 | 2154 | \r |
8e3bc754 | 2155 | First variable character specifies the move size\r |
2156 | Second variable character specifies size of the immediate data\r | |
34e4e297 | 2157 | \r |
8e3bc754 | 2158 | Sign-extend the immediate data to the size of the operation, and zero-extend\r |
2159 | if storing to a register.\r | |
34e4e297 | 2160 | \r |
8e3bc754 | 2161 | Operand1 direct with index/immed is invalid.\r |
fb0b259e | 2162 | \r |
8e3bc754 | 2163 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 2164 | \r |
34e4e297 | 2165 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 2166 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
fb0b259e | 2167 | \r |
2168 | **/\r | |
53c71d09 | 2169 | EFI_STATUS\r |
2170 | ExecuteMOVI (\r | |
2171 | IN VM_CONTEXT *VmPtr\r | |
2172 | )\r | |
53c71d09 | 2173 | {\r |
2174 | UINT8 Opcode;\r | |
2175 | UINT8 Operands;\r | |
2176 | UINT8 Size;\r | |
2177 | INT16 Index16;\r | |
2178 | INT64 ImmData64;\r | |
2179 | UINT64 Op1;\r | |
2180 | UINT64 Mask64;\r | |
2181 | \r | |
2182 | //\r | |
2183 | // Get the opcode and operands byte so we can get R1 and R2\r | |
2184 | //\r | |
2185 | Opcode = GETOPCODE (VmPtr);\r | |
2186 | Operands = GETOPERANDS (VmPtr);\r | |
2187 | \r | |
2188 | //\r | |
2189 | // Get the index (16-bit) if present\r | |
2190 | //\r | |
366219ab | 2191 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r |
53c71d09 | 2192 | Index16 = VmReadIndex16 (VmPtr, 2);\r |
2193 | Size = 4;\r | |
2194 | } else {\r | |
2195 | Index16 = 0;\r | |
2196 | Size = 2;\r | |
2197 | }\r | |
2198 | //\r | |
2199 | // Extract the immediate data. Sign-extend always.\r | |
2200 | //\r | |
2201 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
2202 | ImmData64 = (INT64) (INT16) VmReadImmed16 (VmPtr, Size);\r | |
2203 | Size += 2;\r | |
2204 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
2205 | ImmData64 = (INT64) (INT32) VmReadImmed32 (VmPtr, Size);\r | |
2206 | Size += 4;\r | |
2207 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
2208 | ImmData64 = (INT64) VmReadImmed64 (VmPtr, Size);\r | |
2209 | Size += 8;\r | |
2210 | } else {\r | |
2211 | //\r | |
2212 | // Invalid encoding\r | |
2213 | //\r | |
2214 | EbcDebugSignalException (\r | |
2215 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2216 | EXCEPTION_FLAG_FATAL,\r | |
2217 | VmPtr\r | |
2218 | );\r | |
2219 | return EFI_UNSUPPORTED;\r | |
2220 | }\r | |
2221 | //\r | |
2222 | // Now write back the result\r | |
2223 | //\r | |
2224 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
2225 | //\r | |
2226 | // Operand1 direct. Make sure it didn't have an index.\r | |
2227 | //\r | |
366219ab | 2228 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r |
53c71d09 | 2229 | EbcDebugSignalException (\r |
2230 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2231 | EXCEPTION_FLAG_FATAL,\r | |
2232 | VmPtr\r | |
2233 | );\r | |
2234 | return EFI_UNSUPPORTED;\r | |
2235 | }\r | |
2236 | //\r | |
2237 | // Writing directly to a register. Clear unused bits.\r | |
2238 | //\r | |
2239 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r | |
2240 | Mask64 = 0x000000FF;\r | |
2241 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
2242 | Mask64 = 0x0000FFFF;\r | |
2243 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
2244 | Mask64 = 0x00000000FFFFFFFF;\r | |
2245 | } else {\r | |
2246 | Mask64 = (UINT64)~0;\r | |
2247 | }\r | |
2248 | \r | |
1ccdbf2a | 2249 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = ImmData64 & Mask64;\r |
53c71d09 | 2250 | } else {\r |
2251 | //\r | |
2252 | // Get the address then write back based on size of the move\r | |
2253 | //\r | |
1ccdbf2a | 2254 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r |
53c71d09 | 2255 | if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH8) {\r |
2256 | VmWriteMem8 (VmPtr, (UINTN) Op1, (UINT8) ImmData64);\r | |
2257 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH16) {\r | |
2258 | VmWriteMem16 (VmPtr, (UINTN) Op1, (UINT16) ImmData64);\r | |
2259 | } else if ((Operands & MOVI_M_MOVEWIDTH) == MOVI_MOVEWIDTH32) {\r | |
2260 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) ImmData64);\r | |
2261 | } else {\r | |
c9325700 | 2262 | VmWriteMem64 (VmPtr, (UINTN) Op1, (UINT64) ImmData64);\r |
53c71d09 | 2263 | }\r |
2264 | }\r | |
2265 | //\r | |
2266 | // Advance the instruction pointer\r | |
2267 | //\r | |
2268 | VmPtr->Ip += Size;\r | |
2269 | return EFI_SUCCESS;\r | |
2270 | }\r | |
2271 | \r | |
53c71d09 | 2272 | \r |
fb0b259e | 2273 | /**\r |
53c71d09 | 2274 | Execute the EBC MOV immediate natural. This instruction moves an immediate\r |
2275 | index value into a register or memory location.\r | |
2276 | \r | |
8e3bc754 | 2277 | Instruction syntax:\r |
34e4e297 | 2278 | \r |
8e3bc754 | 2279 | MOVIn[w|d|q] {@}R1 {Index16}, Index16|32|64\r |
53c71d09 | 2280 | \r |
8e3bc754 | 2281 | @param VmPtr A pointer to a VM context.\r |
2282 | \r | |
34e4e297 | 2283 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 2284 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 2285 | \r |
fb0b259e | 2286 | **/\r |
fb0b259e | 2287 | EFI_STATUS\r |
2288 | ExecuteMOVIn (\r | |
2289 | IN VM_CONTEXT *VmPtr\r | |
2290 | )\r | |
53c71d09 | 2291 | {\r |
2292 | UINT8 Opcode;\r | |
2293 | UINT8 Operands;\r | |
2294 | UINT8 Size;\r | |
2295 | INT16 Index16;\r | |
2296 | INT16 ImmedIndex16;\r | |
2297 | INT32 ImmedIndex32;\r | |
2298 | INT64 ImmedIndex64;\r | |
2299 | UINT64 Op1;\r | |
2300 | \r | |
2301 | //\r | |
2302 | // Get the opcode and operands byte so we can get R1 and R2\r | |
2303 | //\r | |
2304 | Opcode = GETOPCODE (VmPtr);\r | |
2305 | Operands = GETOPERANDS (VmPtr);\r | |
2306 | \r | |
2307 | //\r | |
2308 | // Get the operand1 index (16-bit) if present\r | |
2309 | //\r | |
366219ab | 2310 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r |
53c71d09 | 2311 | Index16 = VmReadIndex16 (VmPtr, 2);\r |
2312 | Size = 4;\r | |
2313 | } else {\r | |
2314 | Index16 = 0;\r | |
2315 | Size = 2;\r | |
2316 | }\r | |
2317 | //\r | |
2318 | // Extract the immediate data and convert to a 64-bit index.\r | |
2319 | //\r | |
2320 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
2321 | ImmedIndex16 = VmReadIndex16 (VmPtr, Size);\r | |
2322 | ImmedIndex64 = (INT64) ImmedIndex16;\r | |
2323 | Size += 2;\r | |
2324 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
2325 | ImmedIndex32 = VmReadIndex32 (VmPtr, Size);\r | |
2326 | ImmedIndex64 = (INT64) ImmedIndex32;\r | |
2327 | Size += 4;\r | |
2328 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
2329 | ImmedIndex64 = VmReadIndex64 (VmPtr, Size);\r | |
2330 | Size += 8;\r | |
2331 | } else {\r | |
2332 | //\r | |
2333 | // Invalid encoding\r | |
2334 | //\r | |
2335 | EbcDebugSignalException (\r | |
2336 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2337 | EXCEPTION_FLAG_FATAL,\r | |
2338 | VmPtr\r | |
2339 | );\r | |
2340 | return EFI_UNSUPPORTED;\r | |
2341 | }\r | |
2342 | //\r | |
2343 | // Now write back the result\r | |
2344 | //\r | |
2345 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
2346 | //\r | |
2347 | // Check for MOVIn R1 Index16, Immed (not indirect, with index), which\r | |
2348 | // is illegal\r | |
2349 | //\r | |
366219ab | 2350 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r |
53c71d09 | 2351 | EbcDebugSignalException (\r |
2352 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2353 | EXCEPTION_FLAG_FATAL,\r | |
2354 | VmPtr\r | |
2355 | );\r | |
2356 | return EFI_UNSUPPORTED;\r | |
2357 | }\r | |
2358 | \r | |
1ccdbf2a | 2359 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = ImmedIndex64;\r |
53c71d09 | 2360 | } else {\r |
2361 | //\r | |
2362 | // Get the address\r | |
2363 | //\r | |
1ccdbf2a | 2364 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r |
fbe12b79 | 2365 | VmWriteMemN (VmPtr, (UINTN) Op1, (UINTN)(INTN) ImmedIndex64);\r |
53c71d09 | 2366 | }\r |
2367 | //\r | |
2368 | // Advance the instruction pointer\r | |
2369 | //\r | |
2370 | VmPtr->Ip += Size;\r | |
2371 | return EFI_SUCCESS;\r | |
2372 | }\r | |
2373 | \r | |
53c71d09 | 2374 | \r |
fb0b259e | 2375 | /**\r |
53c71d09 | 2376 | Execute the EBC MOVREL instruction.\r |
2377 | Dest <- Ip + ImmData\r | |
2378 | \r | |
8e3bc754 | 2379 | Instruction syntax:\r |
34e4e297 | 2380 | \r |
8e3bc754 | 2381 | MOVREL[w|d|q] {@}R1 {Index16}, ImmData16|32|64\r |
2382 | \r | |
2383 | @param VmPtr A pointer to a VM context.\r | |
53c71d09 | 2384 | \r |
34e4e297 | 2385 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 2386 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 2387 | \r |
fb0b259e | 2388 | **/\r |
fb0b259e | 2389 | EFI_STATUS\r |
2390 | ExecuteMOVREL (\r | |
2391 | IN VM_CONTEXT *VmPtr\r | |
2392 | )\r | |
53c71d09 | 2393 | {\r |
2394 | UINT8 Opcode;\r | |
2395 | UINT8 Operands;\r | |
2396 | UINT8 Size;\r | |
2397 | INT16 Index16;\r | |
2398 | INT64 ImmData64;\r | |
2399 | UINT64 Op1;\r | |
2400 | UINT64 Op2;\r | |
2401 | \r | |
2402 | //\r | |
2403 | // Get the opcode and operands byte so we can get R1 and R2\r | |
2404 | //\r | |
2405 | Opcode = GETOPCODE (VmPtr);\r | |
2406 | Operands = GETOPERANDS (VmPtr);\r | |
2407 | \r | |
2408 | //\r | |
2409 | // Get the Operand 1 index (16-bit) if present\r | |
2410 | //\r | |
366219ab | 2411 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r |
53c71d09 | 2412 | Index16 = VmReadIndex16 (VmPtr, 2);\r |
2413 | Size = 4;\r | |
2414 | } else {\r | |
2415 | Index16 = 0;\r | |
2416 | Size = 2;\r | |
2417 | }\r | |
2418 | //\r | |
2419 | // Get the immediate data.\r | |
2420 | //\r | |
2421 | if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH16) {\r | |
2422 | ImmData64 = (INT64) VmReadImmed16 (VmPtr, Size);\r | |
2423 | Size += 2;\r | |
2424 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH32) {\r | |
2425 | ImmData64 = (INT64) VmReadImmed32 (VmPtr, Size);\r | |
2426 | Size += 4;\r | |
2427 | } else if ((Opcode & MOVI_M_DATAWIDTH) == MOVI_DATAWIDTH64) {\r | |
2428 | ImmData64 = VmReadImmed64 (VmPtr, Size);\r | |
2429 | Size += 8;\r | |
2430 | } else {\r | |
2431 | //\r | |
2432 | // Invalid encoding\r | |
2433 | //\r | |
2434 | EbcDebugSignalException (\r | |
2435 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2436 | EXCEPTION_FLAG_FATAL,\r | |
2437 | VmPtr\r | |
2438 | );\r | |
2439 | return EFI_UNSUPPORTED;\r | |
2440 | }\r | |
2441 | //\r | |
2442 | // Compute the value and write back the result\r | |
2443 | //\r | |
2444 | Op2 = (UINT64) ((INT64) ((UINT64) (UINTN) VmPtr->Ip) + (INT64) ImmData64 + Size);\r | |
2445 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
2446 | //\r | |
2447 | // Check for illegal combination of operand1 direct with immediate data\r | |
2448 | //\r | |
366219ab | 2449 | if ((Operands & MOVI_M_IMMDATA) != 0) {\r |
53c71d09 | 2450 | EbcDebugSignalException (\r |
2451 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2452 | EXCEPTION_FLAG_FATAL,\r | |
2453 | VmPtr\r | |
2454 | );\r | |
2455 | return EFI_UNSUPPORTED;\r | |
2456 | }\r | |
2457 | \r | |
1ccdbf2a | 2458 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (VM_REGISTER) Op2;\r |
53c71d09 | 2459 | } else {\r |
2460 | //\r | |
2461 | // Get the address = [Rx] + Index16\r | |
2462 | // Write back the result. Always a natural size write, since\r | |
2463 | // we're talking addresses here.\r | |
2464 | //\r | |
1ccdbf2a | 2465 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r |
53c71d09 | 2466 | VmWriteMemN (VmPtr, (UINTN) Op1, (UINTN) Op2);\r |
2467 | }\r | |
2468 | //\r | |
2469 | // Advance the instruction pointer\r | |
2470 | //\r | |
2471 | VmPtr->Ip += Size;\r | |
2472 | return EFI_SUCCESS;\r | |
2473 | }\r | |
2474 | \r | |
53c71d09 | 2475 | \r |
fb0b259e | 2476 | /**\r |
2477 | Execute the EBC MOVsnw instruction. This instruction loads a signed\r | |
53c71d09 | 2478 | natural value from memory or register to another memory or register. On\r |
2479 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
2480 | is a register.\r | |
2481 | \r | |
8e3bc754 | 2482 | Instruction syntax:\r |
34e4e297 | 2483 | \r |
8e3bc754 | 2484 | MOVsnw {@}R1 {Index16}, {@}R2 {Index16|Immed16}\r |
34e4e297 | 2485 | \r |
8e3bc754 | 2486 | 0:7 1=>operand1 index present\r |
2487 | 0:6 1=>operand2 index present\r | |
53c71d09 | 2488 | \r |
8e3bc754 | 2489 | @param VmPtr A pointer to a VM context.\r |
2490 | \r | |
34e4e297 | 2491 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 2492 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 2493 | \r |
fb0b259e | 2494 | **/\r |
fb0b259e | 2495 | EFI_STATUS\r |
2496 | ExecuteMOVsnw (\r | |
2497 | IN VM_CONTEXT *VmPtr\r | |
2498 | )\r | |
53c71d09 | 2499 | {\r |
2500 | UINT8 Opcode;\r | |
2501 | UINT8 Operands;\r | |
2502 | UINT8 Size;\r | |
2503 | INT16 Op1Index;\r | |
2504 | INT16 Op2Index;\r | |
2505 | UINT64 Op2;\r | |
2506 | \r | |
2507 | //\r | |
2508 | // Get the opcode and operand bytes\r | |
2509 | //\r | |
2510 | Opcode = GETOPCODE (VmPtr);\r | |
2511 | Operands = GETOPERANDS (VmPtr);\r | |
2512 | \r | |
2513 | Op1Index = Op2Index = 0;\r | |
2514 | \r | |
2515 | //\r | |
2516 | // Get the indexes if present.\r | |
2517 | //\r | |
2518 | Size = 2;\r | |
366219ab | 2519 | if ((Opcode & OPCODE_M_IMMED_OP1) !=0) {\r |
53c71d09 | 2520 | if (OPERAND1_INDIRECT (Operands)) {\r |
2521 | Op1Index = VmReadIndex16 (VmPtr, 2);\r | |
2522 | } else {\r | |
2523 | //\r | |
2524 | // Illegal form operand1 direct with index: MOVsnw R1 Index16, {@}R2\r | |
2525 | //\r | |
2526 | EbcDebugSignalException (\r | |
2527 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2528 | EXCEPTION_FLAG_FATAL,\r | |
2529 | VmPtr\r | |
2530 | );\r | |
2531 | return EFI_UNSUPPORTED;\r | |
2532 | }\r | |
2533 | \r | |
2534 | Size += sizeof (UINT16);\r | |
2535 | }\r | |
2536 | \r | |
366219ab | 2537 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r |
53c71d09 | 2538 | if (OPERAND2_INDIRECT (Operands)) {\r |
2539 | Op2Index = VmReadIndex16 (VmPtr, Size);\r | |
2540 | } else {\r | |
2541 | Op2Index = VmReadImmed16 (VmPtr, Size);\r | |
2542 | }\r | |
2543 | \r | |
2544 | Size += sizeof (UINT16);\r | |
2545 | }\r | |
2546 | //\r | |
2547 | // Get the data from the source.\r | |
2548 | //\r | |
fa97cbf4 | 2549 | Op2 = (UINT64)(INT64)(INTN)(VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Op2Index);\r |
53c71d09 | 2550 | if (OPERAND2_INDIRECT (Operands)) {\r |
fa97cbf4 | 2551 | Op2 = (UINT64)(INT64)(INTN)VmReadMemN (VmPtr, (UINTN) Op2);\r |
53c71d09 | 2552 | }\r |
2553 | //\r | |
2554 | // Now write back the result.\r | |
2555 | //\r | |
2556 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1ccdbf2a | 2557 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Op2;\r |
53c71d09 | 2558 | } else {\r |
1ccdbf2a | 2559 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r |
53c71d09 | 2560 | }\r |
2561 | //\r | |
2562 | // Advance the instruction pointer\r | |
2563 | //\r | |
2564 | VmPtr->Ip += Size;\r | |
2565 | return EFI_SUCCESS;\r | |
2566 | }\r | |
2567 | \r | |
53c71d09 | 2568 | \r |
fb0b259e | 2569 | /**\r |
2570 | Execute the EBC MOVsnw instruction. This instruction loads a signed\r | |
53c71d09 | 2571 | natural value from memory or register to another memory or register. On\r |
2572 | 32-bit machines, the value gets sign-extended to 64 bits if the destination\r | |
2573 | is a register.\r | |
2574 | \r | |
8e3bc754 | 2575 | Instruction syntax:\r |
34e4e297 | 2576 | \r |
8e3bc754 | 2577 | MOVsnd {@}R1 {Indx32}, {@}R2 {Index32|Immed32}\r |
34e4e297 | 2578 | \r |
8e3bc754 | 2579 | 0:7 1=>operand1 index present\r |
2580 | 0:6 1=>operand2 index present\r | |
2581 | \r | |
2582 | @param VmPtr A pointer to a VM context.\r | |
53c71d09 | 2583 | \r |
34e4e297 | 2584 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 2585 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 2586 | \r |
fb0b259e | 2587 | **/\r |
fb0b259e | 2588 | EFI_STATUS\r |
2589 | ExecuteMOVsnd (\r | |
2590 | IN VM_CONTEXT *VmPtr\r | |
2591 | )\r | |
53c71d09 | 2592 | {\r |
2593 | UINT8 Opcode;\r | |
2594 | UINT8 Operands;\r | |
2595 | UINT8 Size;\r | |
2596 | INT32 Op1Index;\r | |
2597 | INT32 Op2Index;\r | |
2598 | UINT64 Op2;\r | |
2599 | \r | |
2600 | //\r | |
2601 | // Get the opcode and operand bytes\r | |
2602 | //\r | |
2603 | Opcode = GETOPCODE (VmPtr);\r | |
2604 | Operands = GETOPERANDS (VmPtr);\r | |
2605 | \r | |
2606 | Op1Index = Op2Index = 0;\r | |
2607 | \r | |
2608 | //\r | |
2609 | // Get the indexes if present.\r | |
2610 | //\r | |
2611 | Size = 2;\r | |
366219ab | 2612 | if ((Opcode & OPCODE_M_IMMED_OP1) != 0) {\r |
53c71d09 | 2613 | if (OPERAND1_INDIRECT (Operands)) {\r |
2614 | Op1Index = VmReadIndex32 (VmPtr, 2);\r | |
2615 | } else {\r | |
2616 | //\r | |
2617 | // Illegal form operand1 direct with index: MOVsnd R1 Index16,..\r | |
2618 | //\r | |
2619 | EbcDebugSignalException (\r | |
2620 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
2621 | EXCEPTION_FLAG_FATAL,\r | |
2622 | VmPtr\r | |
2623 | );\r | |
2624 | return EFI_UNSUPPORTED;\r | |
2625 | }\r | |
2626 | \r | |
2627 | Size += sizeof (UINT32);\r | |
2628 | }\r | |
2629 | \r | |
366219ab | 2630 | if ((Opcode & OPCODE_M_IMMED_OP2) != 0) {\r |
53c71d09 | 2631 | if (OPERAND2_INDIRECT (Operands)) {\r |
2632 | Op2Index = VmReadIndex32 (VmPtr, Size);\r | |
2633 | } else {\r | |
2634 | Op2Index = VmReadImmed32 (VmPtr, Size);\r | |
2635 | }\r | |
2636 | \r | |
2637 | Size += sizeof (UINT32);\r | |
2638 | }\r | |
2639 | //\r | |
2640 | // Get the data from the source.\r | |
2641 | //\r | |
fa97cbf4 | 2642 | Op2 = (UINT64)(INT64)(INTN)(INT64)(VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Op2Index);\r |
53c71d09 | 2643 | if (OPERAND2_INDIRECT (Operands)) {\r |
fa97cbf4 | 2644 | Op2 = (UINT64)(INT64)(INTN)(INT64)VmReadMemN (VmPtr, (UINTN) Op2);\r |
53c71d09 | 2645 | }\r |
2646 | //\r | |
2647 | // Now write back the result.\r | |
2648 | //\r | |
2649 | if (!OPERAND1_INDIRECT (Operands)) {\r | |
1ccdbf2a | 2650 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Op2;\r |
53c71d09 | 2651 | } else {\r |
1ccdbf2a | 2652 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Op1Index), (UINTN) Op2);\r |
53c71d09 | 2653 | }\r |
2654 | //\r | |
2655 | // Advance the instruction pointer\r | |
2656 | //\r | |
2657 | VmPtr->Ip += Size;\r | |
2658 | return EFI_SUCCESS;\r | |
2659 | }\r | |
2660 | \r | |
53c71d09 | 2661 | \r |
fb0b259e | 2662 | /**\r |
53c71d09 | 2663 | Execute the EBC PUSHn instruction\r |
2664 | \r | |
8e3bc754 | 2665 | Instruction syntax:\r |
2666 | PUSHn {@}R1 {Index16|Immed16}\r | |
53c71d09 | 2667 | \r |
8e3bc754 | 2668 | @param VmPtr A pointer to a VM context.\r |
2669 | \r | |
2670 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
53c71d09 | 2671 | \r |
fb0b259e | 2672 | **/\r |
fb0b259e | 2673 | EFI_STATUS\r |
2674 | ExecutePUSHn (\r | |
2675 | IN VM_CONTEXT *VmPtr\r | |
2676 | )\r | |
53c71d09 | 2677 | {\r |
2678 | UINT8 Opcode;\r | |
2679 | UINT8 Operands;\r | |
2680 | INT16 Index16;\r | |
2681 | UINTN DataN;\r | |
2682 | \r | |
2683 | //\r | |
2684 | // Get opcode and operands\r | |
2685 | //\r | |
2686 | Opcode = GETOPCODE (VmPtr);\r | |
2687 | Operands = GETOPERANDS (VmPtr);\r | |
2688 | \r | |
2689 | //\r | |
2690 | // Get index if present\r | |
2691 | //\r | |
366219ab | 2692 | if ((Opcode & PUSHPOP_M_IMMDATA) != 0) {\r |
53c71d09 | 2693 | if (OPERAND1_INDIRECT (Operands)) {\r |
2694 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2695 | } else {\r | |
2696 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2697 | }\r | |
2698 | \r | |
2699 | VmPtr->Ip += 4;\r | |
2700 | } else {\r | |
2701 | Index16 = 0;\r | |
2702 | VmPtr->Ip += 2;\r | |
2703 | }\r | |
2704 | //\r | |
2705 | // Get the data to push\r | |
2706 | //\r | |
2707 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1ccdbf2a | 2708 | DataN = VmReadMemN (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16));\r |
53c71d09 | 2709 | } else {\r |
1ccdbf2a | 2710 | DataN = (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16);\r |
53c71d09 | 2711 | }\r |
2712 | //\r | |
2713 | // Adjust the stack down.\r | |
2714 | //\r | |
1ccdbf2a | 2715 | VmPtr->Gpr[0] -= sizeof (UINTN);\r |
2716 | VmWriteMemN (VmPtr, (UINTN) VmPtr->Gpr[0], DataN);\r | |
53c71d09 | 2717 | return EFI_SUCCESS;\r |
2718 | }\r | |
2719 | \r | |
53c71d09 | 2720 | \r |
fb0b259e | 2721 | /**\r |
8e3bc754 | 2722 | Execute the EBC PUSH instruction.\r |
2723 | \r | |
2724 | Instruction syntax:\r | |
2725 | PUSH[32|64] {@}R1 {Index16|Immed16}\r | |
53c71d09 | 2726 | \r |
8e3bc754 | 2727 | @param VmPtr A pointer to a VM context.\r |
53c71d09 | 2728 | \r |
8e3bc754 | 2729 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 2730 | \r |
fb0b259e | 2731 | **/\r |
fb0b259e | 2732 | EFI_STATUS\r |
2733 | ExecutePUSH (\r | |
2734 | IN VM_CONTEXT *VmPtr\r | |
2735 | )\r | |
53c71d09 | 2736 | {\r |
2737 | UINT8 Opcode;\r | |
2738 | UINT8 Operands;\r | |
2739 | UINT32 Data32;\r | |
2740 | UINT64 Data64;\r | |
2741 | INT16 Index16;\r | |
2742 | \r | |
2743 | //\r | |
2744 | // Get opcode and operands\r | |
2745 | //\r | |
2746 | Opcode = GETOPCODE (VmPtr);\r | |
2747 | Operands = GETOPERANDS (VmPtr);\r | |
2748 | //\r | |
2749 | // Get immediate index if present, then advance the IP.\r | |
2750 | //\r | |
366219ab | 2751 | if ((Opcode & PUSHPOP_M_IMMDATA) != 0) {\r |
53c71d09 | 2752 | if (OPERAND1_INDIRECT (Operands)) {\r |
2753 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2754 | } else {\r | |
2755 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2756 | }\r | |
2757 | \r | |
2758 | VmPtr->Ip += 4;\r | |
2759 | } else {\r | |
2760 | Index16 = 0;\r | |
2761 | VmPtr->Ip += 2;\r | |
2762 | }\r | |
2763 | //\r | |
2764 | // Get the data to push\r | |
2765 | //\r | |
366219ab | 2766 | if ((Opcode & PUSHPOP_M_64) != 0) {\r |
53c71d09 | 2767 | if (OPERAND1_INDIRECT (Operands)) {\r |
1ccdbf2a | 2768 | Data64 = VmReadMem64 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16));\r |
53c71d09 | 2769 | } else {\r |
1ccdbf2a | 2770 | Data64 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r |
53c71d09 | 2771 | }\r |
2772 | //\r | |
2773 | // Adjust the stack down, then write back the data\r | |
2774 | //\r | |
1ccdbf2a | 2775 | VmPtr->Gpr[0] -= sizeof (UINT64);\r |
2776 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], Data64);\r | |
53c71d09 | 2777 | } else {\r |
2778 | //\r | |
2779 | // 32-bit data\r | |
2780 | //\r | |
2781 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1ccdbf2a | 2782 | Data32 = VmReadMem32 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16));\r |
53c71d09 | 2783 | } else {\r |
1ccdbf2a | 2784 | Data32 = (UINT32) VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16;\r |
53c71d09 | 2785 | }\r |
2786 | //\r | |
2787 | // Adjust the stack down and write the data\r | |
2788 | //\r | |
1ccdbf2a | 2789 | VmPtr->Gpr[0] -= sizeof (UINT32);\r |
2790 | VmWriteMem32 (VmPtr, (UINTN) VmPtr->Gpr[0], Data32);\r | |
53c71d09 | 2791 | }\r |
2792 | \r | |
2793 | return EFI_SUCCESS;\r | |
2794 | }\r | |
2795 | \r | |
53c71d09 | 2796 | \r |
fb0b259e | 2797 | /**\r |
8e3bc754 | 2798 | Execute the EBC POPn instruction.\r |
53c71d09 | 2799 | \r |
8e3bc754 | 2800 | Instruction syntax:\r |
2801 | POPn {@}R1 {Index16|Immed16}\r | |
53c71d09 | 2802 | \r |
8e3bc754 | 2803 | @param VmPtr A pointer to a VM context.\r |
2804 | \r | |
2805 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
53c71d09 | 2806 | \r |
fb0b259e | 2807 | **/\r |
fb0b259e | 2808 | EFI_STATUS\r |
2809 | ExecutePOPn (\r | |
2810 | IN VM_CONTEXT *VmPtr\r | |
2811 | )\r | |
53c71d09 | 2812 | {\r |
2813 | UINT8 Opcode;\r | |
2814 | UINT8 Operands;\r | |
2815 | INT16 Index16;\r | |
2816 | UINTN DataN;\r | |
2817 | \r | |
2818 | //\r | |
2819 | // Get opcode and operands\r | |
2820 | //\r | |
2821 | Opcode = GETOPCODE (VmPtr);\r | |
2822 | Operands = GETOPERANDS (VmPtr);\r | |
2823 | //\r | |
2824 | // Get immediate data if present, and advance the IP\r | |
2825 | //\r | |
366219ab | 2826 | if ((Opcode & PUSHPOP_M_IMMDATA) != 0) {\r |
53c71d09 | 2827 | if (OPERAND1_INDIRECT (Operands)) {\r |
2828 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2829 | } else {\r | |
2830 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2831 | }\r | |
2832 | \r | |
2833 | VmPtr->Ip += 4;\r | |
2834 | } else {\r | |
2835 | Index16 = 0;\r | |
2836 | VmPtr->Ip += 2;\r | |
2837 | }\r | |
2838 | //\r | |
2839 | // Read the data off the stack, then adjust the stack pointer\r | |
2840 | //\r | |
1ccdbf2a | 2841 | DataN = VmReadMemN (VmPtr, (UINTN) VmPtr->Gpr[0]);\r |
2842 | VmPtr->Gpr[0] += sizeof (UINTN);\r | |
53c71d09 | 2843 | //\r |
2844 | // Do the write-back\r | |
2845 | //\r | |
2846 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1ccdbf2a | 2847 | VmWriteMemN (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16), DataN);\r |
53c71d09 | 2848 | } else {\r |
1ccdbf2a | 2849 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (INT64) (UINT64) ((UINTN) DataN + Index16);\r |
53c71d09 | 2850 | }\r |
2851 | \r | |
2852 | return EFI_SUCCESS;\r | |
2853 | }\r | |
2854 | \r | |
53c71d09 | 2855 | \r |
fb0b259e | 2856 | /**\r |
8e3bc754 | 2857 | Execute the EBC POP instruction.\r |
2858 | \r | |
2859 | Instruction syntax:\r | |
2860 | POPn {@}R1 {Index16|Immed16}\r | |
53c71d09 | 2861 | \r |
8e3bc754 | 2862 | @param VmPtr A pointer to a VM context.\r |
53c71d09 | 2863 | \r |
8e3bc754 | 2864 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 2865 | \r |
fb0b259e | 2866 | **/\r |
fb0b259e | 2867 | EFI_STATUS\r |
2868 | ExecutePOP (\r | |
2869 | IN VM_CONTEXT *VmPtr\r | |
2870 | )\r | |
53c71d09 | 2871 | {\r |
2872 | UINT8 Opcode;\r | |
2873 | UINT8 Operands;\r | |
2874 | INT16 Index16;\r | |
2875 | INT32 Data32;\r | |
2876 | UINT64 Data64;\r | |
2877 | \r | |
2878 | //\r | |
2879 | // Get opcode and operands\r | |
2880 | //\r | |
2881 | Opcode = GETOPCODE (VmPtr);\r | |
2882 | Operands = GETOPERANDS (VmPtr);\r | |
2883 | //\r | |
2884 | // Get immediate data if present, and advance the IP.\r | |
2885 | //\r | |
366219ab | 2886 | if ((Opcode & PUSHPOP_M_IMMDATA) != 0) {\r |
53c71d09 | 2887 | if (OPERAND1_INDIRECT (Operands)) {\r |
2888 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
2889 | } else {\r | |
2890 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
2891 | }\r | |
2892 | \r | |
2893 | VmPtr->Ip += 4;\r | |
2894 | } else {\r | |
2895 | Index16 = 0;\r | |
2896 | VmPtr->Ip += 2;\r | |
2897 | }\r | |
2898 | //\r | |
2899 | // Get the data off the stack, then write it to the appropriate location\r | |
2900 | //\r | |
366219ab | 2901 | if ((Opcode & PUSHPOP_M_64) != 0) {\r |
53c71d09 | 2902 | //\r |
2903 | // Read the data off the stack, then adjust the stack pointer\r | |
2904 | //\r | |
1ccdbf2a | 2905 | Data64 = VmReadMem64 (VmPtr, (UINTN) VmPtr->Gpr[0]);\r |
2906 | VmPtr->Gpr[0] += sizeof (UINT64);\r | |
53c71d09 | 2907 | //\r |
2908 | // Do the write-back\r | |
2909 | //\r | |
2910 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1ccdbf2a | 2911 | VmWriteMem64 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16), Data64);\r |
53c71d09 | 2912 | } else {\r |
1ccdbf2a | 2913 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Data64 + Index16;\r |
53c71d09 | 2914 | }\r |
2915 | } else {\r | |
2916 | //\r | |
2917 | // 32-bit pop. Read it off the stack and adjust the stack pointer\r | |
2918 | //\r | |
1ccdbf2a | 2919 | Data32 = (INT32) VmReadMem32 (VmPtr, (UINTN) VmPtr->Gpr[0]);\r |
2920 | VmPtr->Gpr[0] += sizeof (UINT32);\r | |
53c71d09 | 2921 | //\r |
2922 | // Do the write-back\r | |
2923 | //\r | |
2924 | if (OPERAND1_INDIRECT (Operands)) {\r | |
1ccdbf2a | 2925 | VmWriteMem32 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND1_REGNUM (Operands)] + Index16), Data32);\r |
53c71d09 | 2926 | } else {\r |
1ccdbf2a | 2927 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (INT64) Data32 + Index16;\r |
53c71d09 | 2928 | }\r |
2929 | }\r | |
2930 | \r | |
2931 | return EFI_SUCCESS;\r | |
2932 | }\r | |
2933 | \r | |
53c71d09 | 2934 | \r |
fb0b259e | 2935 | /**\r |
53c71d09 | 2936 | Implements the EBC CALL instruction.\r |
8e3bc754 | 2937 | \r |
fb0b259e | 2938 | Instruction format:\r |
8e3bc754 | 2939 | CALL64 Immed64\r |
2940 | CALL32 {@}R1 {Immed32|Index32}\r | |
2941 | CALLEX64 Immed64\r | |
2942 | CALLEX16 {@}R1 {Immed32}\r | |
2943 | \r | |
2944 | If Rx == R0, then it's a PC relative call to PC = PC + imm32.\r | |
53c71d09 | 2945 | \r |
8e3bc754 | 2946 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 2947 | \r |
8e3bc754 | 2948 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 2949 | \r |
fb0b259e | 2950 | **/\r |
fb0b259e | 2951 | EFI_STATUS\r |
2952 | ExecuteCALL (\r | |
2953 | IN VM_CONTEXT *VmPtr\r | |
2954 | )\r | |
53c71d09 | 2955 | {\r |
2956 | UINT8 Opcode;\r | |
2957 | UINT8 Operands;\r | |
2958 | INT32 Immed32;\r | |
2959 | UINT8 Size;\r | |
2960 | INT64 Immed64;\r | |
2961 | VOID *FramePtr;\r | |
2962 | \r | |
2963 | //\r | |
2964 | // Get opcode and operands\r | |
2965 | //\r | |
2966 | Opcode = GETOPCODE (VmPtr);\r | |
2967 | Operands = GETOPERANDS (VmPtr);\r | |
2968 | //\r | |
2969 | // Assign these as well to avoid compiler warnings\r | |
2970 | //\r | |
2971 | Immed64 = 0;\r | |
2972 | Immed32 = 0;\r | |
2973 | \r | |
2974 | FramePtr = VmPtr->FramePtr;\r | |
2975 | //\r | |
2976 | // Determine the instruction size, and get immediate data if present\r | |
2977 | //\r | |
366219ab | 2978 | if ((Opcode & OPCODE_M_IMMDATA) != 0) {\r |
2979 | if ((Opcode & OPCODE_M_IMMDATA64) != 0) {\r | |
53c71d09 | 2980 | Immed64 = VmReadImmed64 (VmPtr, 2);\r |
2981 | Size = 10;\r | |
2982 | } else {\r | |
2983 | //\r | |
2984 | // If register operand is indirect, then the immediate data is an index\r | |
2985 | //\r | |
2986 | if (OPERAND1_INDIRECT (Operands)) {\r | |
2987 | Immed32 = VmReadIndex32 (VmPtr, 2);\r | |
2988 | } else {\r | |
2989 | Immed32 = VmReadImmed32 (VmPtr, 2);\r | |
2990 | }\r | |
2991 | \r | |
2992 | Size = 6;\r | |
2993 | }\r | |
2994 | } else {\r | |
2995 | Size = 2;\r | |
2996 | }\r | |
2997 | //\r | |
2998 | // If it's a call to EBC, adjust the stack pointer down 16 bytes and\r | |
2999 | // put our return address and frame pointer on the VM stack.\r | |
3000 | //\r | |
3001 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
1ccdbf2a | 3002 | VmPtr->Gpr[0] -= 8;\r |
3003 | VmWriteMemN (VmPtr, (UINTN) VmPtr->Gpr[0], (UINTN) FramePtr);\r | |
3004 | VmPtr->FramePtr = (VOID *) (UINTN) VmPtr->Gpr[0];\r | |
3005 | VmPtr->Gpr[0] -= 8;\r | |
3006 | VmWriteMem64 (VmPtr, (UINTN) VmPtr->Gpr[0], (UINT64) (UINTN) (VmPtr->Ip + Size));\r | |
53c71d09 | 3007 | }\r |
3008 | //\r | |
3009 | // If 64-bit data, then absolute jump only\r | |
3010 | //\r | |
366219ab | 3011 | if ((Opcode & OPCODE_M_IMMDATA64) != 0) {\r |
53c71d09 | 3012 | //\r |
3013 | // Native or EBC call?\r | |
3014 | //\r | |
3015 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
3016 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
3017 | } else {\r | |
3018 | //\r | |
3019 | // Call external function, get the return value, and advance the IP\r | |
3020 | //\r | |
1ccdbf2a | 3021 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->Gpr[0], FramePtr, Size);\r |
53c71d09 | 3022 | }\r |
3023 | } else {\r | |
3024 | //\r | |
3025 | // Get the register data. If operand1 == 0, then ignore register and\r | |
3026 | // take immediate data as relative or absolute address.\r | |
3027 | // Compiler should take care of upper bits if 32-bit machine.\r | |
3028 | //\r | |
3029 | if (OPERAND1_REGNUM (Operands) != 0) {\r | |
1ccdbf2a | 3030 | Immed64 = (UINT64) (UINTN) VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r |
53c71d09 | 3031 | }\r |
3032 | //\r | |
3033 | // Get final address\r | |
3034 | //\r | |
3035 | if (OPERAND1_INDIRECT (Operands)) {\r | |
3036 | Immed64 = (INT64) (UINT64) (UINTN) VmReadMemN (VmPtr, (UINTN) (Immed64 + Immed32));\r | |
3037 | } else {\r | |
3038 | Immed64 += Immed32;\r | |
3039 | }\r | |
3040 | //\r | |
3041 | // Now determine if external call, and then if relative or absolute\r | |
3042 | //\r | |
3043 | if ((Operands & OPERAND_M_NATIVE_CALL) == 0) {\r | |
3044 | //\r | |
3045 | // EBC call. Relative or absolute? If relative, then it's relative to the\r | |
3046 | // start of the next instruction.\r | |
3047 | //\r | |
366219ab | 3048 | if ((Operands & OPERAND_M_RELATIVE_ADDR) != 0) {\r |
53c71d09 | 3049 | VmPtr->Ip += Immed64 + Size;\r |
3050 | } else {\r | |
3051 | VmPtr->Ip = (VMIP) (UINTN) Immed64;\r | |
3052 | }\r | |
3053 | } else {\r | |
3054 | //\r | |
3055 | // Native call. Relative or absolute?\r | |
3056 | //\r | |
366219ab | 3057 | if ((Operands & OPERAND_M_RELATIVE_ADDR) != 0) {\r |
1ccdbf2a | 3058 | EbcLLCALLEX (VmPtr, (UINTN) (Immed64 + VmPtr->Ip + Size), (UINTN) VmPtr->Gpr[0], FramePtr, Size);\r |
53c71d09 | 3059 | } else {\r |
366219ab | 3060 | if ((VmPtr->StopFlags & STOPFLAG_BREAK_ON_CALLEX) != 0) {\r |
53c71d09 | 3061 | CpuBreakpoint ();\r |
3062 | }\r | |
3063 | \r | |
1ccdbf2a | 3064 | EbcLLCALLEX (VmPtr, (UINTN) Immed64, (UINTN) VmPtr->Gpr[0], FramePtr, Size);\r |
53c71d09 | 3065 | }\r |
3066 | }\r | |
3067 | }\r | |
3068 | \r | |
3069 | return EFI_SUCCESS;\r | |
3070 | }\r | |
3071 | \r | |
53c71d09 | 3072 | \r |
fb0b259e | 3073 | /**\r |
8e3bc754 | 3074 | Execute the EBC RET instruction.\r |
53c71d09 | 3075 | \r |
8e3bc754 | 3076 | Instruction syntax:\r |
3077 | RET\r | |
53c71d09 | 3078 | \r |
8e3bc754 | 3079 | @param VmPtr A pointer to a VM context.\r |
3080 | \r | |
3081 | @retval EFI_SUCCESS The instruction is executed successfully.\r | |
53c71d09 | 3082 | \r |
fb0b259e | 3083 | **/\r |
fb0b259e | 3084 | EFI_STATUS\r |
3085 | ExecuteRET (\r | |
3086 | IN VM_CONTEXT *VmPtr\r | |
3087 | )\r | |
53c71d09 | 3088 | {\r |
3089 | //\r | |
3090 | // If we're at the top of the stack, then simply set the done\r | |
3091 | // flag and return\r | |
3092 | //\r | |
1ccdbf2a | 3093 | if (VmPtr->StackRetAddr == (UINT64) VmPtr->Gpr[0]) {\r |
53c71d09 | 3094 | VmPtr->StopFlags |= STOPFLAG_APP_DONE;\r |
3095 | } else {\r | |
3096 | //\r | |
3097 | // Pull the return address off the VM app's stack and set the IP\r | |
3098 | // to it\r | |
3099 | //\r | |
1ccdbf2a | 3100 | if (!IS_ALIGNED ((UINTN) VmPtr->Gpr[0], sizeof (UINT16))) {\r |
53c71d09 | 3101 | EbcDebugSignalException (\r |
3102 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
3103 | EXCEPTION_FLAG_FATAL,\r | |
3104 | VmPtr\r | |
3105 | );\r | |
3106 | }\r | |
3107 | //\r | |
3108 | // Restore the IP and frame pointer from the stack\r | |
3109 | //\r | |
1ccdbf2a | 3110 | VmPtr->Ip = (VMIP) (UINTN) VmReadMem64 (VmPtr, (UINTN) VmPtr->Gpr[0]);\r |
3111 | VmPtr->Gpr[0] += 8;\r | |
3112 | VmPtr->FramePtr = (VOID *) VmReadMemN (VmPtr, (UINTN) VmPtr->Gpr[0]);\r | |
3113 | VmPtr->Gpr[0] += 8;\r | |
53c71d09 | 3114 | }\r |
3115 | \r | |
3116 | return EFI_SUCCESS;\r | |
3117 | }\r | |
3118 | \r | |
53c71d09 | 3119 | \r |
fb0b259e | 3120 | /**\r |
8e3bc754 | 3121 | Execute the EBC CMP instruction.\r |
3122 | \r | |
3123 | Instruction syntax:\r | |
3124 | CMP[32|64][eq|lte|gte|ulte|ugte] R1, {@}R2 {Index16|Immed16}\r | |
53c71d09 | 3125 | \r |
8e3bc754 | 3126 | @param VmPtr A pointer to a VM context.\r |
53c71d09 | 3127 | \r |
34e4e297 | 3128 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 3129 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 3130 | \r |
fb0b259e | 3131 | **/\r |
fb0b259e | 3132 | EFI_STATUS\r |
3133 | ExecuteCMP (\r | |
3134 | IN VM_CONTEXT *VmPtr\r | |
3135 | )\r | |
53c71d09 | 3136 | {\r |
3137 | UINT8 Opcode;\r | |
3138 | UINT8 Operands;\r | |
3139 | UINT8 Size;\r | |
3140 | INT16 Index16;\r | |
3141 | UINT32 Flag;\r | |
3142 | INT64 Op2;\r | |
3143 | INT64 Op1;\r | |
3144 | \r | |
3145 | //\r | |
3146 | // Get opcode and operands\r | |
3147 | //\r | |
3148 | Opcode = GETOPCODE (VmPtr);\r | |
3149 | Operands = GETOPERANDS (VmPtr);\r | |
3150 | //\r | |
3151 | // Get the register data we're going to compare to\r | |
3152 | //\r | |
1ccdbf2a | 3153 | Op1 = VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r |
53c71d09 | 3154 | //\r |
3155 | // Get immediate data\r | |
3156 | //\r | |
366219ab | 3157 | if ((Opcode & OPCODE_M_IMMDATA) != 0) {\r |
53c71d09 | 3158 | if (OPERAND2_INDIRECT (Operands)) {\r |
3159 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
3160 | } else {\r | |
3161 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
3162 | }\r | |
3163 | \r | |
3164 | Size = 4;\r | |
3165 | } else {\r | |
3166 | Index16 = 0;\r | |
3167 | Size = 2;\r | |
3168 | }\r | |
3169 | //\r | |
3170 | // Now get Op2\r | |
3171 | //\r | |
3172 | if (OPERAND2_INDIRECT (Operands)) {\r | |
366219ab | 3173 | if ((Opcode & OPCODE_M_64BIT) != 0) {\r |
1ccdbf2a | 3174 | Op2 = (INT64) VmReadMem64 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index16));\r |
53c71d09 | 3175 | } else {\r |
3176 | //\r | |
3177 | // 32-bit operations. 0-extend the values for all cases.\r | |
3178 | //\r | |
1ccdbf2a | 3179 | Op2 = (INT64) (UINT64) ((UINT32) VmReadMem32 (VmPtr, (UINTN) (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index16)));\r |
53c71d09 | 3180 | }\r |
3181 | } else {\r | |
1ccdbf2a | 3182 | Op2 = VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index16;\r |
53c71d09 | 3183 | }\r |
3184 | //\r | |
3185 | // Now do the compare\r | |
3186 | //\r | |
3187 | Flag = 0;\r | |
366219ab | 3188 | if ((Opcode & OPCODE_M_64BIT) != 0) {\r |
53c71d09 | 3189 | //\r |
3190 | // 64-bit compares\r | |
3191 | //\r | |
3192 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
3193 | case OPCODE_CMPEQ:\r | |
3194 | if (Op1 == Op2) {\r | |
3195 | Flag = 1;\r | |
3196 | }\r | |
3197 | break;\r | |
3198 | \r | |
3199 | case OPCODE_CMPLTE:\r | |
3200 | if (Op1 <= Op2) {\r | |
3201 | Flag = 1;\r | |
3202 | }\r | |
3203 | break;\r | |
3204 | \r | |
3205 | case OPCODE_CMPGTE:\r | |
3206 | if (Op1 >= Op2) {\r | |
3207 | Flag = 1;\r | |
3208 | }\r | |
3209 | break;\r | |
3210 | \r | |
3211 | case OPCODE_CMPULTE:\r | |
3212 | if ((UINT64) Op1 <= (UINT64) Op2) {\r | |
3213 | Flag = 1;\r | |
3214 | }\r | |
3215 | break;\r | |
3216 | \r | |
3217 | case OPCODE_CMPUGTE:\r | |
3218 | if ((UINT64) Op1 >= (UINT64) Op2) {\r | |
3219 | Flag = 1;\r | |
3220 | }\r | |
3221 | break;\r | |
3222 | \r | |
3223 | default:\r | |
3224 | ASSERT (0);\r | |
3225 | }\r | |
3226 | } else {\r | |
3227 | //\r | |
3228 | // 32-bit compares\r | |
3229 | //\r | |
3230 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
3231 | case OPCODE_CMPEQ:\r | |
3232 | if ((INT32) Op1 == (INT32) Op2) {\r | |
3233 | Flag = 1;\r | |
3234 | }\r | |
3235 | break;\r | |
3236 | \r | |
3237 | case OPCODE_CMPLTE:\r | |
3238 | if ((INT32) Op1 <= (INT32) Op2) {\r | |
3239 | Flag = 1;\r | |
3240 | }\r | |
3241 | break;\r | |
3242 | \r | |
3243 | case OPCODE_CMPGTE:\r | |
3244 | if ((INT32) Op1 >= (INT32) Op2) {\r | |
3245 | Flag = 1;\r | |
3246 | }\r | |
3247 | break;\r | |
3248 | \r | |
3249 | case OPCODE_CMPULTE:\r | |
3250 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
3251 | Flag = 1;\r | |
3252 | }\r | |
3253 | break;\r | |
3254 | \r | |
3255 | case OPCODE_CMPUGTE:\r | |
3256 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
3257 | Flag = 1;\r | |
3258 | }\r | |
3259 | break;\r | |
3260 | \r | |
3261 | default:\r | |
3262 | ASSERT (0);\r | |
3263 | }\r | |
3264 | }\r | |
3265 | //\r | |
3266 | // Now set the flag accordingly for the comparison\r | |
3267 | //\r | |
366219ab | 3268 | if (Flag != 0) {\r |
53c71d09 | 3269 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r |
3270 | } else {\r | |
3271 | VMFLAG_CLEAR (VmPtr, VMFLAGS_CC);\r | |
3272 | }\r | |
3273 | //\r | |
3274 | // Advance the IP\r | |
3275 | //\r | |
3276 | VmPtr->Ip += Size;\r | |
3277 | return EFI_SUCCESS;\r | |
3278 | }\r | |
3279 | \r | |
53c71d09 | 3280 | \r |
fb0b259e | 3281 | /**\r |
53c71d09 | 3282 | Execute the EBC CMPI instruction\r |
3283 | \r | |
8e3bc754 | 3284 | Instruction syntax:\r |
3285 | CMPI[32|64]{w|d}[eq|lte|gte|ulte|ugte] {@}Rx {Index16}, Immed16|Immed32\r | |
53c71d09 | 3286 | \r |
8e3bc754 | 3287 | @param VmPtr A pointer to a VM context.\r |
3288 | \r | |
34e4e297 | 3289 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 3290 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 3291 | \r |
fb0b259e | 3292 | **/\r |
fb0b259e | 3293 | EFI_STATUS\r |
3294 | ExecuteCMPI (\r | |
3295 | IN VM_CONTEXT *VmPtr\r | |
3296 | )\r | |
53c71d09 | 3297 | {\r |
3298 | UINT8 Opcode;\r | |
3299 | UINT8 Operands;\r | |
3300 | UINT8 Size;\r | |
3301 | INT64 Op1;\r | |
3302 | INT64 Op2;\r | |
3303 | INT16 Index16;\r | |
3304 | UINT32 Flag;\r | |
3305 | \r | |
3306 | //\r | |
3307 | // Get opcode and operands\r | |
3308 | //\r | |
3309 | Opcode = GETOPCODE (VmPtr);\r | |
3310 | Operands = GETOPERANDS (VmPtr);\r | |
3311 | \r | |
3312 | //\r | |
3313 | // Get operand1 index if present\r | |
3314 | //\r | |
3315 | Size = 2;\r | |
366219ab | 3316 | if ((Operands & OPERAND_M_CMPI_INDEX) != 0) {\r |
53c71d09 | 3317 | Index16 = VmReadIndex16 (VmPtr, 2);\r |
3318 | Size += 2;\r | |
3319 | } else {\r | |
3320 | Index16 = 0;\r | |
3321 | }\r | |
3322 | //\r | |
3323 | // Get operand1 data we're going to compare to\r | |
3324 | //\r | |
1ccdbf2a | 3325 | Op1 = (INT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r |
53c71d09 | 3326 | if (OPERAND1_INDIRECT (Operands)) {\r |
3327 | //\r | |
3328 | // Indirect operand1. Fetch 32 or 64-bit value based on compare size.\r | |
3329 | //\r | |
366219ab | 3330 | if ((Opcode & OPCODE_M_CMPI64) != 0) {\r |
53c71d09 | 3331 | Op1 = (INT64) VmReadMem64 (VmPtr, (UINTN) Op1 + Index16);\r |
3332 | } else {\r | |
3333 | Op1 = (INT64) VmReadMem32 (VmPtr, (UINTN) Op1 + Index16);\r | |
3334 | }\r | |
3335 | } else {\r | |
3336 | //\r | |
3337 | // Better not have been an index with direct. That is, CMPI R1 Index,...\r | |
3338 | // is illegal.\r | |
3339 | //\r | |
366219ab | 3340 | if ((Operands & OPERAND_M_CMPI_INDEX) != 0) {\r |
53c71d09 | 3341 | EbcDebugSignalException (\r |
3342 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
3343 | EXCEPTION_FLAG_ERROR,\r | |
3344 | VmPtr\r | |
3345 | );\r | |
3346 | VmPtr->Ip += Size;\r | |
3347 | return EFI_UNSUPPORTED;\r | |
3348 | }\r | |
3349 | }\r | |
3350 | //\r | |
3351 | // Get immediate data -- 16- or 32-bit sign extended\r | |
3352 | //\r | |
366219ab | 3353 | if ((Opcode & OPCODE_M_CMPI32_DATA) != 0) {\r |
53c71d09 | 3354 | Op2 = (INT64) VmReadImmed32 (VmPtr, Size);\r |
3355 | Size += 4;\r | |
3356 | } else {\r | |
3357 | //\r | |
3358 | // 16-bit immediate data. Sign extend always.\r | |
3359 | //\r | |
3360 | Op2 = (INT64) ((INT16) VmReadImmed16 (VmPtr, Size));\r | |
3361 | Size += 2;\r | |
3362 | }\r | |
3363 | //\r | |
3364 | // Now do the compare\r | |
3365 | //\r | |
3366 | Flag = 0;\r | |
366219ab | 3367 | if ((Opcode & OPCODE_M_CMPI64) != 0) {\r |
53c71d09 | 3368 | //\r |
3369 | // 64 bit comparison\r | |
3370 | //\r | |
3371 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
3372 | case OPCODE_CMPIEQ:\r | |
3373 | if (Op1 == (INT64) Op2) {\r | |
3374 | Flag = 1;\r | |
3375 | }\r | |
3376 | break;\r | |
3377 | \r | |
3378 | case OPCODE_CMPILTE:\r | |
3379 | if (Op1 <= (INT64) Op2) {\r | |
3380 | Flag = 1;\r | |
3381 | }\r | |
3382 | break;\r | |
3383 | \r | |
3384 | case OPCODE_CMPIGTE:\r | |
3385 | if (Op1 >= (INT64) Op2) {\r | |
3386 | Flag = 1;\r | |
3387 | }\r | |
3388 | break;\r | |
3389 | \r | |
3390 | case OPCODE_CMPIULTE:\r | |
3391 | if ((UINT64) Op1 <= (UINT64) ((UINT32) Op2)) {\r | |
3392 | Flag = 1;\r | |
3393 | }\r | |
3394 | break;\r | |
3395 | \r | |
3396 | case OPCODE_CMPIUGTE:\r | |
3397 | if ((UINT64) Op1 >= (UINT64) ((UINT32) Op2)) {\r | |
3398 | Flag = 1;\r | |
3399 | }\r | |
3400 | break;\r | |
3401 | \r | |
3402 | default:\r | |
3403 | ASSERT (0);\r | |
3404 | }\r | |
3405 | } else {\r | |
3406 | //\r | |
3407 | // 32-bit comparisons\r | |
3408 | //\r | |
3409 | switch (Opcode & OPCODE_M_OPCODE) {\r | |
3410 | case OPCODE_CMPIEQ:\r | |
3411 | if ((INT32) Op1 == Op2) {\r | |
3412 | Flag = 1;\r | |
3413 | }\r | |
3414 | break;\r | |
3415 | \r | |
3416 | case OPCODE_CMPILTE:\r | |
3417 | if ((INT32) Op1 <= Op2) {\r | |
3418 | Flag = 1;\r | |
3419 | }\r | |
3420 | break;\r | |
3421 | \r | |
3422 | case OPCODE_CMPIGTE:\r | |
3423 | if ((INT32) Op1 >= Op2) {\r | |
3424 | Flag = 1;\r | |
3425 | }\r | |
3426 | break;\r | |
3427 | \r | |
3428 | case OPCODE_CMPIULTE:\r | |
3429 | if ((UINT32) Op1 <= (UINT32) Op2) {\r | |
3430 | Flag = 1;\r | |
3431 | }\r | |
3432 | break;\r | |
3433 | \r | |
3434 | case OPCODE_CMPIUGTE:\r | |
3435 | if ((UINT32) Op1 >= (UINT32) Op2) {\r | |
3436 | Flag = 1;\r | |
3437 | }\r | |
3438 | break;\r | |
3439 | \r | |
3440 | default:\r | |
3441 | ASSERT (0);\r | |
3442 | }\r | |
3443 | }\r | |
3444 | //\r | |
3445 | // Now set the flag accordingly for the comparison\r | |
3446 | //\r | |
366219ab | 3447 | if (Flag != 0) {\r |
53c71d09 | 3448 | VMFLAG_SET (VmPtr, VMFLAGS_CC);\r |
3449 | } else {\r | |
3450 | VMFLAG_CLEAR (VmPtr, VMFLAGS_CC);\r | |
3451 | }\r | |
3452 | //\r | |
3453 | // Advance the IP\r | |
3454 | //\r | |
3455 | VmPtr->Ip += Size;\r | |
3456 | return EFI_SUCCESS;\r | |
3457 | }\r | |
3458 | \r | |
fb0b259e | 3459 | \r |
3460 | /**\r | |
8e3bc754 | 3461 | Execute the EBC NOT instruction.s\r |
3462 | \r | |
3463 | Instruction syntax:\r | |
3464 | NOT[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
fb0b259e | 3465 | \r |
8e3bc754 | 3466 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 3467 | @param Op1 Operand 1 from the instruction\r |
3468 | @param Op2 Operand 2 from the instruction\r | |
3469 | \r | |
3470 | @return ~Op2\r | |
fb0b259e | 3471 | \r |
3472 | **/\r | |
53c71d09 | 3473 | UINT64\r |
3474 | ExecuteNOT (\r | |
3475 | IN VM_CONTEXT *VmPtr,\r | |
3476 | IN UINT64 Op1,\r | |
3477 | IN UINT64 Op2\r | |
3478 | )\r | |
fb0b259e | 3479 | {\r |
3480 | return ~Op2;\r | |
3481 | }\r | |
53c71d09 | 3482 | \r |
53c71d09 | 3483 | \r |
fb0b259e | 3484 | /**\r |
8e3bc754 | 3485 | Execute the EBC NEG instruction.\r |
53c71d09 | 3486 | \r |
8e3bc754 | 3487 | Instruction syntax:\r |
3488 | NEG[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3489 | \r | |
3490 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3491 | @param Op1 Operand 1 from the instruction\r |
3492 | @param Op2 Operand 2 from the instruction\r | |
53c71d09 | 3493 | \r |
fb0b259e | 3494 | @return Op2 * -1\r |
53c71d09 | 3495 | \r |
fb0b259e | 3496 | **/\r |
53c71d09 | 3497 | UINT64\r |
3498 | ExecuteNEG (\r | |
3499 | IN VM_CONTEXT *VmPtr,\r | |
3500 | IN UINT64 Op1,\r | |
3501 | IN UINT64 Op2\r | |
3502 | )\r | |
fb0b259e | 3503 | {\r |
3504 | return ~Op2 + 1;\r | |
3505 | }\r | |
53c71d09 | 3506 | \r |
53c71d09 | 3507 | \r |
fb0b259e | 3508 | /**\r |
8e3bc754 | 3509 | Execute the EBC ADD instruction.\r |
3510 | \r | |
3511 | Instruction syntax:\r | |
3512 | ADD[32|64] {@}R1, {@}R2 {Index16}\r | |
53c71d09 | 3513 | \r |
8e3bc754 | 3514 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 3515 | @param Op1 Operand 1 from the instruction\r |
3516 | @param Op2 Operand 2 from the instruction\r | |
53c71d09 | 3517 | \r |
fb0b259e | 3518 | @return Op1 + Op2\r |
53c71d09 | 3519 | \r |
fb0b259e | 3520 | **/\r |
53c71d09 | 3521 | UINT64\r |
3522 | ExecuteADD (\r | |
3523 | IN VM_CONTEXT *VmPtr,\r | |
3524 | IN UINT64 Op1,\r | |
3525 | IN UINT64 Op2\r | |
3526 | )\r | |
fb0b259e | 3527 | {\r |
3528 | return Op1 + Op2;\r | |
3529 | }\r | |
53c71d09 | 3530 | \r |
53c71d09 | 3531 | \r |
fb0b259e | 3532 | /**\r |
8e3bc754 | 3533 | Execute the EBC SUB instruction.\r |
53c71d09 | 3534 | \r |
8e3bc754 | 3535 | Instruction syntax:\r |
3536 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3537 | \r | |
3538 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3539 | @param Op1 Operand 1 from the instruction\r |
3540 | @param Op2 Operand 2 from the instruction\r | |
53c71d09 | 3541 | \r |
8e3bc754 | 3542 | @return Op1 - Op2\r |
53c71d09 | 3543 | \r |
fb0b259e | 3544 | **/\r |
53c71d09 | 3545 | UINT64\r |
3546 | ExecuteSUB (\r | |
3547 | IN VM_CONTEXT *VmPtr,\r | |
3548 | IN UINT64 Op1,\r | |
3549 | IN UINT64 Op2\r | |
3550 | )\r | |
53c71d09 | 3551 | {\r |
366219ab | 3552 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 3553 | return (UINT64) ((INT64) ((INT64) Op1 - (INT64) Op2));\r |
3554 | } else {\r | |
3555 | return (UINT64) ((INT64) ((INT32) Op1 - (INT32) Op2));\r | |
3556 | }\r | |
3557 | }\r | |
3558 | \r | |
fb0b259e | 3559 | \r |
3560 | /**\r | |
8e3bc754 | 3561 | Execute the EBC MUL instruction.\r |
3562 | \r | |
3563 | Instruction syntax:\r | |
3564 | SUB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
fb0b259e | 3565 | \r |
8e3bc754 | 3566 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 3567 | @param Op1 Operand 1 from the instruction\r |
3568 | @param Op2 Operand 2 from the instruction\r | |
3569 | \r | |
3570 | @return Op1 * Op2\r | |
fb0b259e | 3571 | \r |
3572 | **/\r | |
53c71d09 | 3573 | UINT64\r |
3574 | ExecuteMUL (\r | |
3575 | IN VM_CONTEXT *VmPtr,\r | |
3576 | IN UINT64 Op1,\r | |
3577 | IN UINT64 Op2\r | |
3578 | )\r | |
53c71d09 | 3579 | {\r |
366219ab | 3580 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 3581 | return MultS64x64 ((INT64)Op1, (INT64)Op2);\r |
3582 | } else {\r | |
3583 | return (UINT64) ((INT64) ((INT32) Op1 * (INT32) Op2));\r | |
3584 | }\r | |
3585 | }\r | |
3586 | \r | |
fb0b259e | 3587 | \r |
3588 | /**\r | |
3589 | Execute the EBC MULU instruction\r | |
3590 | \r | |
8e3bc754 | 3591 | Instruction syntax:\r |
3592 | MULU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3593 | \r | |
3594 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3595 | @param Op1 Operand 1 from the instruction\r |
3596 | @param Op2 Operand 2 from the instruction\r | |
3597 | \r | |
3598 | @return (unsigned)Op1 * (unsigned)Op2\r | |
fb0b259e | 3599 | \r |
3600 | **/\r | |
53c71d09 | 3601 | UINT64\r |
3602 | ExecuteMULU (\r | |
3603 | IN VM_CONTEXT *VmPtr,\r | |
3604 | IN UINT64 Op1,\r | |
3605 | IN UINT64 Op2\r | |
3606 | )\r | |
53c71d09 | 3607 | {\r |
366219ab | 3608 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 3609 | return MultU64x64 (Op1, Op2);\r |
3610 | } else {\r | |
3611 | return (UINT64) ((UINT32) Op1 * (UINT32) Op2);\r | |
3612 | }\r | |
3613 | }\r | |
3614 | \r | |
fb0b259e | 3615 | \r |
3616 | /**\r | |
8e3bc754 | 3617 | Execute the EBC DIV instruction.\r |
3618 | \r | |
3619 | Instruction syntax:\r | |
3620 | DIV[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
fb0b259e | 3621 | \r |
8e3bc754 | 3622 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 3623 | @param Op1 Operand 1 from the instruction\r |
3624 | @param Op2 Operand 2 from the instruction\r | |
3625 | \r | |
8e3bc754 | 3626 | @return Op1 / Op2\r |
fb0b259e | 3627 | \r |
3628 | **/\r | |
53c71d09 | 3629 | UINT64\r |
3630 | ExecuteDIV (\r | |
3631 | IN VM_CONTEXT *VmPtr,\r | |
3632 | IN UINT64 Op1,\r | |
3633 | IN UINT64 Op2\r | |
3634 | )\r | |
53c71d09 | 3635 | {\r |
3636 | INT64 Remainder;\r | |
3637 | \r | |
3638 | //\r | |
3639 | // Check for divide-by-0\r | |
3640 | //\r | |
3641 | if (Op2 == 0) {\r | |
3642 | EbcDebugSignalException (\r | |
3643 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3644 | EXCEPTION_FLAG_FATAL,\r | |
3645 | VmPtr\r | |
3646 | );\r | |
3647 | \r | |
3648 | return 0;\r | |
3649 | } else {\r | |
366219ab | 3650 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 3651 | return (UINT64) (DivS64x64Remainder (Op1, Op2, &Remainder));\r |
3652 | } else {\r | |
3653 | return (UINT64) ((INT64) ((INT32) Op1 / (INT32) Op2));\r | |
3654 | }\r | |
3655 | }\r | |
3656 | }\r | |
3657 | \r | |
fb0b259e | 3658 | \r |
3659 | /**\r | |
3660 | Execute the EBC DIVU instruction\r | |
3661 | \r | |
8e3bc754 | 3662 | Instruction syntax:\r |
3663 | DIVU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3664 | \r | |
3665 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3666 | @param Op1 Operand 1 from the instruction\r |
3667 | @param Op2 Operand 2 from the instruction\r | |
3668 | \r | |
3669 | @return (unsigned)Op1 / (unsigned)Op2\r | |
fb0b259e | 3670 | \r |
3671 | **/\r | |
53c71d09 | 3672 | UINT64\r |
3673 | ExecuteDIVU (\r | |
3674 | IN VM_CONTEXT *VmPtr,\r | |
3675 | IN UINT64 Op1,\r | |
3676 | IN UINT64 Op2\r | |
3677 | )\r | |
53c71d09 | 3678 | {\r |
3679 | UINT64 Remainder;\r | |
3680 | \r | |
3681 | //\r | |
3682 | // Check for divide-by-0\r | |
3683 | //\r | |
3684 | if (Op2 == 0) {\r | |
3685 | EbcDebugSignalException (\r | |
3686 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3687 | EXCEPTION_FLAG_FATAL,\r | |
3688 | VmPtr\r | |
3689 | );\r | |
3690 | return 0;\r | |
3691 | } else {\r | |
3692 | //\r | |
3693 | // Get the destination register\r | |
3694 | //\r | |
366219ab | 3695 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r |
c9325700 | 3696 | return (UINT64) (DivU64x64Remainder (Op1, Op2, &Remainder));\r |
53c71d09 | 3697 | } else {\r |
3698 | return (UINT64) ((UINT32) Op1 / (UINT32) Op2);\r | |
3699 | }\r | |
3700 | }\r | |
3701 | }\r | |
3702 | \r | |
fb0b259e | 3703 | \r |
3704 | /**\r | |
8e3bc754 | 3705 | Execute the EBC MOD instruction.\r |
3706 | \r | |
3707 | Instruction syntax:\r | |
3708 | MOD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
fb0b259e | 3709 | \r |
8e3bc754 | 3710 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 3711 | @param Op1 Operand 1 from the instruction\r |
3712 | @param Op2 Operand 2 from the instruction\r | |
3713 | \r | |
3714 | @return Op1 MODULUS Op2\r | |
fb0b259e | 3715 | \r |
3716 | **/\r | |
53c71d09 | 3717 | UINT64\r |
3718 | ExecuteMOD (\r | |
3719 | IN VM_CONTEXT *VmPtr,\r | |
3720 | IN UINT64 Op1,\r | |
3721 | IN UINT64 Op2\r | |
3722 | )\r | |
53c71d09 | 3723 | {\r |
3724 | INT64 Remainder;\r | |
3725 | \r | |
3726 | //\r | |
3727 | // Check for divide-by-0\r | |
3728 | //\r | |
3729 | if (Op2 == 0) {\r | |
3730 | EbcDebugSignalException (\r | |
3731 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3732 | EXCEPTION_FLAG_FATAL,\r | |
3733 | VmPtr\r | |
3734 | );\r | |
3735 | return 0;\r | |
3736 | } else {\r | |
3737 | DivS64x64Remainder ((INT64)Op1, (INT64)Op2, &Remainder);\r | |
3738 | return Remainder;\r | |
3739 | }\r | |
3740 | }\r | |
3741 | \r | |
fb0b259e | 3742 | \r |
3743 | /**\r | |
8e3bc754 | 3744 | Execute the EBC MODU instruction.\r |
fb0b259e | 3745 | \r |
8e3bc754 | 3746 | Instruction syntax:\r |
3747 | MODU[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3748 | \r | |
3749 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3750 | @param Op1 Operand 1 from the instruction\r |
3751 | @param Op2 Operand 2 from the instruction\r | |
3752 | \r | |
3753 | @return Op1 UNSIGNED_MODULUS Op2\r | |
fb0b259e | 3754 | \r |
3755 | **/\r | |
53c71d09 | 3756 | UINT64\r |
3757 | ExecuteMODU (\r | |
3758 | IN VM_CONTEXT *VmPtr,\r | |
3759 | IN UINT64 Op1,\r | |
3760 | IN UINT64 Op2\r | |
3761 | )\r | |
53c71d09 | 3762 | {\r |
3763 | UINT64 Remainder;\r | |
3764 | \r | |
3765 | //\r | |
3766 | // Check for divide-by-0\r | |
3767 | //\r | |
3768 | if (Op2 == 0) {\r | |
3769 | EbcDebugSignalException (\r | |
3770 | EXCEPT_EBC_DIVIDE_ERROR,\r | |
3771 | EXCEPTION_FLAG_FATAL,\r | |
3772 | VmPtr\r | |
3773 | );\r | |
3774 | return 0;\r | |
3775 | } else {\r | |
3776 | DivU64x64Remainder (Op1, Op2, &Remainder);\r | |
3777 | return Remainder;\r | |
3778 | }\r | |
3779 | }\r | |
3780 | \r | |
fb0b259e | 3781 | \r |
3782 | /**\r | |
8e3bc754 | 3783 | Execute the EBC AND instruction.\r |
3784 | \r | |
3785 | Instruction syntax:\r | |
3786 | AND[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
fb0b259e | 3787 | \r |
8e3bc754 | 3788 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 3789 | @param Op1 Operand 1 from the instruction\r |
3790 | @param Op2 Operand 2 from the instruction\r | |
3791 | \r | |
3792 | @return Op1 AND Op2\r | |
fb0b259e | 3793 | \r |
3794 | **/\r | |
53c71d09 | 3795 | UINT64\r |
3796 | ExecuteAND (\r | |
3797 | IN VM_CONTEXT *VmPtr,\r | |
3798 | IN UINT64 Op1,\r | |
3799 | IN UINT64 Op2\r | |
3800 | )\r | |
fb0b259e | 3801 | {\r |
3802 | return Op1 & Op2;\r | |
3803 | }\r | |
53c71d09 | 3804 | \r |
53c71d09 | 3805 | \r |
fb0b259e | 3806 | /**\r |
8e3bc754 | 3807 | Execute the EBC OR instruction.\r |
53c71d09 | 3808 | \r |
8e3bc754 | 3809 | Instruction syntax:\r |
3810 | OR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3811 | \r | |
3812 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3813 | @param Op1 Operand 1 from the instruction\r |
3814 | @param Op2 Operand 2 from the instruction\r | |
53c71d09 | 3815 | \r |
fb0b259e | 3816 | @return Op1 OR Op2\r |
53c71d09 | 3817 | \r |
fb0b259e | 3818 | **/\r |
53c71d09 | 3819 | UINT64\r |
3820 | ExecuteOR (\r | |
3821 | IN VM_CONTEXT *VmPtr,\r | |
3822 | IN UINT64 Op1,\r | |
3823 | IN UINT64 Op2\r | |
3824 | )\r | |
fb0b259e | 3825 | {\r |
3826 | return Op1 | Op2;\r | |
3827 | }\r | |
53c71d09 | 3828 | \r |
53c71d09 | 3829 | \r |
fb0b259e | 3830 | /**\r |
8e3bc754 | 3831 | Execute the EBC XOR instruction.\r |
3832 | \r | |
3833 | Instruction syntax:\r | |
3834 | XOR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
53c71d09 | 3835 | \r |
8e3bc754 | 3836 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 3837 | @param Op1 Operand 1 from the instruction\r |
3838 | @param Op2 Operand 2 from the instruction\r | |
53c71d09 | 3839 | \r |
fb0b259e | 3840 | @return Op1 XOR Op2\r |
53c71d09 | 3841 | \r |
fb0b259e | 3842 | **/\r |
53c71d09 | 3843 | UINT64\r |
3844 | ExecuteXOR (\r | |
3845 | IN VM_CONTEXT *VmPtr,\r | |
3846 | IN UINT64 Op1,\r | |
3847 | IN UINT64 Op2\r | |
3848 | )\r | |
fb0b259e | 3849 | {\r |
3850 | return Op1 ^ Op2;\r | |
3851 | }\r | |
53c71d09 | 3852 | \r |
53c71d09 | 3853 | \r |
fb0b259e | 3854 | /**\r |
8e3bc754 | 3855 | Execute the EBC SHL shift left instruction.\r |
53c71d09 | 3856 | \r |
8e3bc754 | 3857 | Instruction syntax:\r |
3858 | SHL[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3859 | \r | |
3860 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3861 | @param Op1 Operand 1 from the instruction\r |
3862 | @param Op2 Operand 2 from the instruction\r | |
53c71d09 | 3863 | \r |
fb0b259e | 3864 | @return Op1 << Op2\r |
53c71d09 | 3865 | \r |
fb0b259e | 3866 | **/\r |
53c71d09 | 3867 | UINT64\r |
3868 | ExecuteSHL (\r | |
3869 | IN VM_CONTEXT *VmPtr,\r | |
3870 | IN UINT64 Op1,\r | |
3871 | IN UINT64 Op2\r | |
3872 | )\r | |
53c71d09 | 3873 | {\r |
366219ab | 3874 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 3875 | return LShiftU64 (Op1, (UINTN)Op2);\r |
3876 | } else {\r | |
3877 | return (UINT64) ((UINT32) ((UINT32) Op1 << (UINT32) Op2));\r | |
3878 | }\r | |
3879 | }\r | |
3880 | \r | |
fb0b259e | 3881 | \r |
3882 | /**\r | |
8e3bc754 | 3883 | Execute the EBC SHR instruction.\r |
3884 | \r | |
3885 | Instruction syntax:\r | |
3886 | SHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
fb0b259e | 3887 | \r |
8e3bc754 | 3888 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 3889 | @param Op1 Operand 1 from the instruction\r |
3890 | @param Op2 Operand 2 from the instruction\r | |
3891 | \r | |
3892 | @return Op1 >> Op2 (unsigned operands)\r | |
fb0b259e | 3893 | \r |
3894 | **/\r | |
53c71d09 | 3895 | UINT64\r |
3896 | ExecuteSHR (\r | |
3897 | IN VM_CONTEXT *VmPtr,\r | |
3898 | IN UINT64 Op1,\r | |
3899 | IN UINT64 Op2\r | |
3900 | )\r | |
53c71d09 | 3901 | {\r |
366219ab | 3902 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 3903 | return RShiftU64 (Op1, (UINTN)Op2);\r |
3904 | } else {\r | |
3905 | return (UINT64) ((UINT32) Op1 >> (UINT32) Op2);\r | |
3906 | }\r | |
3907 | }\r | |
3908 | \r | |
fb0b259e | 3909 | \r |
3910 | /**\r | |
8e3bc754 | 3911 | Execute the EBC ASHR instruction.\r |
fb0b259e | 3912 | \r |
8e3bc754 | 3913 | Instruction syntax:\r |
3914 | ASHR[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3915 | \r | |
3916 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3917 | @param Op1 Operand 1 from the instruction\r |
3918 | @param Op2 Operand 2 from the instruction\r | |
3919 | \r | |
3920 | @return Op1 >> Op2 (signed)\r | |
fb0b259e | 3921 | \r |
3922 | **/\r | |
53c71d09 | 3923 | UINT64\r |
3924 | ExecuteASHR (\r | |
3925 | IN VM_CONTEXT *VmPtr,\r | |
3926 | IN UINT64 Op1,\r | |
3927 | IN UINT64 Op2\r | |
3928 | )\r | |
53c71d09 | 3929 | {\r |
366219ab | 3930 | if ((*VmPtr->Ip & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 3931 | return ARShiftU64 (Op1, (UINTN)Op2);\r |
3932 | } else {\r | |
3933 | return (UINT64) ((INT64) ((INT32) Op1 >> (UINT32) Op2));\r | |
3934 | }\r | |
3935 | }\r | |
3936 | \r | |
fb0b259e | 3937 | \r |
3938 | /**\r | |
3939 | Execute the EBC EXTNDB instruction to sign-extend a byte value.\r | |
3940 | \r | |
8e3bc754 | 3941 | Instruction syntax:\r |
3942 | EXTNDB[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3943 | \r | |
3944 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3945 | @param Op1 Operand 1 from the instruction\r |
3946 | @param Op2 Operand 2 from the instruction\r | |
3947 | \r | |
3948 | @return (INT64)(INT8)Op2\r | |
fb0b259e | 3949 | \r |
3950 | **/\r | |
53c71d09 | 3951 | UINT64\r |
3952 | ExecuteEXTNDB (\r | |
3953 | IN VM_CONTEXT *VmPtr,\r | |
3954 | IN UINT64 Op1,\r | |
3955 | IN UINT64 Op2\r | |
3956 | )\r | |
53c71d09 | 3957 | {\r |
3958 | INT8 Data8;\r | |
3959 | INT64 Data64;\r | |
3960 | //\r | |
3961 | // Convert to byte, then return as 64-bit signed value to let compiler\r | |
3962 | // sign-extend the value\r | |
3963 | //\r | |
3964 | Data8 = (INT8) Op2;\r | |
3965 | Data64 = (INT64) Data8;\r | |
3966 | \r | |
3967 | return (UINT64) Data64;\r | |
3968 | }\r | |
3969 | \r | |
fb0b259e | 3970 | \r |
3971 | /**\r | |
3972 | Execute the EBC EXTNDW instruction to sign-extend a 16-bit value.\r | |
3973 | \r | |
8e3bc754 | 3974 | Instruction syntax:\r |
3975 | EXTNDW[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
3976 | \r | |
3977 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 3978 | @param Op1 Operand 1 from the instruction\r |
3979 | @param Op2 Operand 2 from the instruction\r | |
3980 | \r | |
3981 | @return (INT64)(INT16)Op2\r | |
fb0b259e | 3982 | \r |
3983 | **/\r | |
53c71d09 | 3984 | UINT64\r |
3985 | ExecuteEXTNDW (\r | |
3986 | IN VM_CONTEXT *VmPtr,\r | |
3987 | IN UINT64 Op1,\r | |
3988 | IN UINT64 Op2\r | |
3989 | )\r | |
53c71d09 | 3990 | {\r |
3991 | INT16 Data16;\r | |
3992 | INT64 Data64;\r | |
3993 | //\r | |
3994 | // Convert to word, then return as 64-bit signed value to let compiler\r | |
3995 | // sign-extend the value\r | |
3996 | //\r | |
3997 | Data16 = (INT16) Op2;\r | |
3998 | Data64 = (INT64) Data16;\r | |
3999 | \r | |
4000 | return (UINT64) Data64;\r | |
4001 | }\r | |
4002 | //\r | |
4003 | // Execute the EBC EXTNDD instruction.\r | |
4004 | //\r | |
4005 | // Format: EXTNDD {@}Rx, {@}Ry [Index16|Immed16]\r | |
4006 | // EXTNDD Dest, Source\r | |
4007 | //\r | |
4008 | // Operation: Dest <- SignExtended((DWORD)Source))\r | |
4009 | //\r | |
fb0b259e | 4010 | \r |
4011 | /**\r | |
4012 | Execute the EBC EXTNDD instruction to sign-extend a 32-bit value.\r | |
4013 | \r | |
8e3bc754 | 4014 | Instruction syntax:\r |
4015 | EXTNDD[32|64] {@}R1, {@}R2 {Index16|Immed16}\r | |
4016 | \r | |
4017 | @param VmPtr A pointer to a VM context.\r | |
fb0b259e | 4018 | @param Op1 Operand 1 from the instruction\r |
4019 | @param Op2 Operand 2 from the instruction\r | |
4020 | \r | |
4021 | @return (INT64)(INT32)Op2\r | |
fb0b259e | 4022 | \r |
4023 | **/\r | |
53c71d09 | 4024 | UINT64\r |
4025 | ExecuteEXTNDD (\r | |
4026 | IN VM_CONTEXT *VmPtr,\r | |
4027 | IN UINT64 Op1,\r | |
4028 | IN UINT64 Op2\r | |
4029 | )\r | |
53c71d09 | 4030 | {\r |
4031 | INT32 Data32;\r | |
4032 | INT64 Data64;\r | |
4033 | //\r | |
4034 | // Convert to 32-bit value, then return as 64-bit signed value to let compiler\r | |
4035 | // sign-extend the value\r | |
4036 | //\r | |
4037 | Data32 = (INT32) Op2;\r | |
4038 | Data64 = (INT64) Data32;\r | |
4039 | \r | |
4040 | return (UINT64) Data64;\r | |
4041 | }\r | |
4042 | \r | |
8e3bc754 | 4043 | \r |
4044 | /**\r | |
4045 | Execute all the EBC signed data manipulation instructions.\r | |
4046 | Since the EBC data manipulation instructions all have the same basic form,\r | |
4047 | they can share the code that does the fetch of operands and the write-back\r | |
4048 | of the result. This function performs the fetch of the operands (even if\r | |
4049 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
4050 | appropriate subfunction, then writes back the returned result.\r | |
4051 | \r | |
4052 | Format:\r | |
4053 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
4054 | \r | |
4055 | @param VmPtr A pointer to VM context.\r | |
4056 | \r | |
34e4e297 | 4057 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 4058 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
4059 | \r | |
4060 | **/\r | |
53c71d09 | 4061 | EFI_STATUS\r |
4062 | ExecuteSignedDataManip (\r | |
4063 | IN VM_CONTEXT *VmPtr\r | |
4064 | )\r | |
4065 | {\r | |
4066 | //\r | |
4067 | // Just call the data manipulation function with a flag indicating this\r | |
4068 | // is a signed operation.\r | |
4069 | //\r | |
4070 | return ExecuteDataManip (VmPtr, TRUE);\r | |
4071 | }\r | |
4072 | \r | |
8e3bc754 | 4073 | \r |
4074 | /**\r | |
4075 | Execute all the EBC unsigned data manipulation instructions.\r | |
4076 | Since the EBC data manipulation instructions all have the same basic form,\r | |
4077 | they can share the code that does the fetch of operands and the write-back\r | |
4078 | of the result. This function performs the fetch of the operands (even if\r | |
4079 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
4080 | appropriate subfunction, then writes back the returned result.\r | |
4081 | \r | |
4082 | Format:\r | |
4083 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
4084 | \r | |
4085 | @param VmPtr A pointer to VM context.\r | |
4086 | \r | |
34e4e297 | 4087 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 4088 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
4089 | \r | |
4090 | **/\r | |
53c71d09 | 4091 | EFI_STATUS\r |
4092 | ExecuteUnsignedDataManip (\r | |
4093 | IN VM_CONTEXT *VmPtr\r | |
4094 | )\r | |
4095 | {\r | |
4096 | //\r | |
4097 | // Just call the data manipulation function with a flag indicating this\r | |
4098 | // is not a signed operation.\r | |
4099 | //\r | |
4100 | return ExecuteDataManip (VmPtr, FALSE);\r | |
4101 | }\r | |
4102 | \r | |
53c71d09 | 4103 | \r |
fb0b259e | 4104 | /**\r |
4105 | Execute all the EBC data manipulation instructions.\r | |
4106 | Since the EBC data manipulation instructions all have the same basic form,\r | |
53c71d09 | 4107 | they can share the code that does the fetch of operands and the write-back\r |
4108 | of the result. This function performs the fetch of the operands (even if\r | |
4109 | both are not needed to be fetched, like NOT instruction), dispatches to the\r | |
4110 | appropriate subfunction, then writes back the returned result.\r | |
4111 | \r | |
8e3bc754 | 4112 | Format:\r |
4113 | INSTRUCITON[32|64] {@}R1, {@}R2 {Immed16|Index16}\r | |
53c71d09 | 4114 | \r |
8e3bc754 | 4115 | @param VmPtr A pointer to VM context.\r |
4116 | @param IsSignedOp Indicates whether the operand is signed or not.\r | |
4117 | \r | |
34e4e297 | 4118 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 4119 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 4120 | \r |
fb0b259e | 4121 | **/\r |
fb0b259e | 4122 | EFI_STATUS\r |
4123 | ExecuteDataManip (\r | |
4124 | IN VM_CONTEXT *VmPtr,\r | |
4125 | IN BOOLEAN IsSignedOp\r | |
4126 | )\r | |
53c71d09 | 4127 | {\r |
4128 | UINT8 Opcode;\r | |
4129 | INT16 Index16;\r | |
4130 | UINT8 Operands;\r | |
4131 | UINT8 Size;\r | |
4132 | UINT64 Op1;\r | |
4133 | UINT64 Op2;\r | |
ead7e7dc | 4134 | INTN DataManipDispatchTableIndex;\r |
53c71d09 | 4135 | \r |
4136 | //\r | |
4137 | // Get opcode and operands\r | |
4138 | //\r | |
4139 | Opcode = GETOPCODE (VmPtr);\r | |
4140 | Operands = GETOPERANDS (VmPtr);\r | |
4141 | \r | |
4142 | //\r | |
4143 | // Determine if we have immediate data by the opcode\r | |
4144 | //\r | |
366219ab | 4145 | if ((Opcode & DATAMANIP_M_IMMDATA) != 0) {\r |
53c71d09 | 4146 | //\r |
4147 | // Index16 if Ry is indirect, or Immed16 if Ry direct.\r | |
4148 | //\r | |
4149 | if (OPERAND2_INDIRECT (Operands)) {\r | |
4150 | Index16 = VmReadIndex16 (VmPtr, 2);\r | |
4151 | } else {\r | |
4152 | Index16 = VmReadImmed16 (VmPtr, 2);\r | |
4153 | }\r | |
4154 | \r | |
4155 | Size = 4;\r | |
4156 | } else {\r | |
4157 | Index16 = 0;\r | |
4158 | Size = 2;\r | |
4159 | }\r | |
4160 | //\r | |
4161 | // Now get operand2 (source). It's of format {@}R2 {Index16|Immed16}\r | |
4162 | //\r | |
1ccdbf2a | 4163 | Op2 = (UINT64) VmPtr->Gpr[OPERAND2_REGNUM (Operands)] + Index16;\r |
53c71d09 | 4164 | if (OPERAND2_INDIRECT (Operands)) {\r |
4165 | //\r | |
4166 | // Indirect form: @R2 Index16. Fetch as 32- or 64-bit data\r | |
4167 | //\r | |
366219ab | 4168 | if ((Opcode & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 4169 | Op2 = VmReadMem64 (VmPtr, (UINTN) Op2);\r |
4170 | } else {\r | |
4171 | //\r | |
4172 | // Read as signed value where appropriate.\r | |
4173 | //\r | |
4174 | if (IsSignedOp) {\r | |
4175 | Op2 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op2));\r | |
4176 | } else {\r | |
4177 | Op2 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op2);\r | |
4178 | }\r | |
4179 | }\r | |
4180 | } else {\r | |
4181 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
4182 | if (IsSignedOp) {\r | |
4183 | Op2 = (UINT64) (INT64) ((INT32) Op2);\r | |
4184 | } else {\r | |
4185 | Op2 = (UINT64) ((UINT32) Op2);\r | |
4186 | }\r | |
4187 | }\r | |
4188 | }\r | |
4189 | //\r | |
4190 | // Get operand1 (destination and sometimes also an actual operand)\r | |
4191 | // of form {@}R1\r | |
4192 | //\r | |
c9325700 | 4193 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r |
53c71d09 | 4194 | if (OPERAND1_INDIRECT (Operands)) {\r |
366219ab | 4195 | if ((Opcode & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 4196 | Op1 = VmReadMem64 (VmPtr, (UINTN) Op1);\r |
4197 | } else {\r | |
4198 | if (IsSignedOp) {\r | |
4199 | Op1 = (UINT64) (INT64) ((INT32) VmReadMem32 (VmPtr, (UINTN) Op1));\r | |
4200 | } else {\r | |
4201 | Op1 = (UINT64) VmReadMem32 (VmPtr, (UINTN) Op1);\r | |
4202 | }\r | |
4203 | }\r | |
4204 | } else {\r | |
4205 | if ((Opcode & DATAMANIP_M_64) == 0) {\r | |
4206 | if (IsSignedOp) {\r | |
4207 | Op1 = (UINT64) (INT64) ((INT32) Op1);\r | |
4208 | } else {\r | |
4209 | Op1 = (UINT64) ((UINT32) Op1);\r | |
4210 | }\r | |
4211 | }\r | |
4212 | }\r | |
4213 | //\r | |
4214 | // Dispatch to the computation function\r | |
4215 | //\r | |
ead7e7dc | 4216 | DataManipDispatchTableIndex = (Opcode & OPCODE_M_OPCODE) - OPCODE_NOT;\r |
4217 | if ((DataManipDispatchTableIndex < 0) ||\r | |
4218 | (DataManipDispatchTableIndex >= sizeof (mDataManipDispatchTable) / sizeof (mDataManipDispatchTable[0]))) {\r | |
53c71d09 | 4219 | EbcDebugSignalException (\r |
4220 | EXCEPT_EBC_INVALID_OPCODE,\r | |
4221 | EXCEPTION_FLAG_ERROR,\r | |
4222 | VmPtr\r | |
4223 | );\r | |
4224 | //\r | |
4225 | // Advance and return\r | |
4226 | //\r | |
4227 | VmPtr->Ip += Size;\r | |
4228 | return EFI_UNSUPPORTED;\r | |
4229 | } else {\r | |
ead7e7dc | 4230 | Op2 = mDataManipDispatchTable[DataManipDispatchTableIndex](VmPtr, Op1, Op2);\r |
53c71d09 | 4231 | }\r |
4232 | //\r | |
4233 | // Write back the result.\r | |
4234 | //\r | |
4235 | if (OPERAND1_INDIRECT (Operands)) {\r | |
c9325700 | 4236 | Op1 = (UINT64) VmPtr->Gpr[OPERAND1_REGNUM (Operands)];\r |
366219ab | 4237 | if ((Opcode & DATAMANIP_M_64) != 0) {\r |
53c71d09 | 4238 | VmWriteMem64 (VmPtr, (UINTN) Op1, Op2);\r |
4239 | } else {\r | |
4240 | VmWriteMem32 (VmPtr, (UINTN) Op1, (UINT32) Op2);\r | |
4241 | }\r | |
4242 | } else {\r | |
4243 | //\r | |
4244 | // Storage back to a register. Write back, clearing upper bits (as per\r | |
4245 | // the specification) if 32-bit operation.\r | |
4246 | //\r | |
1ccdbf2a | 4247 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = Op2;\r |
53c71d09 | 4248 | if ((Opcode & DATAMANIP_M_64) == 0) {\r |
1ccdbf2a | 4249 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] &= 0xFFFFFFFF;\r |
53c71d09 | 4250 | }\r |
4251 | }\r | |
4252 | //\r | |
4253 | // Advance the instruction pointer\r | |
4254 | //\r | |
4255 | VmPtr->Ip += Size;\r | |
4256 | return EFI_SUCCESS;\r | |
4257 | }\r | |
4258 | \r | |
53c71d09 | 4259 | \r |
fb0b259e | 4260 | /**\r |
8e3bc754 | 4261 | Execute the EBC LOADSP instruction.\r |
4262 | \r | |
4263 | Instruction syntax:\r | |
4264 | LOADSP SP1, R2\r | |
53c71d09 | 4265 | \r |
8e3bc754 | 4266 | @param VmPtr A pointer to a VM context.\r |
53c71d09 | 4267 | \r |
34e4e297 | 4268 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 4269 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 4270 | \r |
fb0b259e | 4271 | **/\r |
fb0b259e | 4272 | EFI_STATUS\r |
4273 | ExecuteLOADSP (\r | |
4274 | IN VM_CONTEXT *VmPtr\r | |
4275 | )\r | |
53c71d09 | 4276 | {\r |
4277 | UINT8 Operands;\r | |
4278 | \r | |
4279 | //\r | |
4280 | // Get the operands\r | |
4281 | //\r | |
4282 | Operands = GETOPERANDS (VmPtr);\r | |
4283 | \r | |
4284 | //\r | |
4285 | // Do the operation\r | |
4286 | //\r | |
4287 | switch (OPERAND1_REGNUM (Operands)) {\r | |
4288 | //\r | |
4289 | // Set flags\r | |
4290 | //\r | |
4291 | case 0:\r | |
4292 | //\r | |
4293 | // Spec states that this instruction will not modify reserved bits in\r | |
4294 | // the flags register.\r | |
4295 | //\r | |
1ccdbf2a | 4296 | VmPtr->Flags = (VmPtr->Flags &~VMFLAGS_ALL_VALID) | (VmPtr->Gpr[OPERAND2_REGNUM (Operands)] & VMFLAGS_ALL_VALID);\r |
53c71d09 | 4297 | break;\r |
4298 | \r | |
4299 | default:\r | |
4300 | EbcDebugSignalException (\r | |
4301 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
4302 | EXCEPTION_FLAG_WARNING,\r | |
4303 | VmPtr\r | |
4304 | );\r | |
4305 | VmPtr->Ip += 2;\r | |
4306 | return EFI_UNSUPPORTED;\r | |
4307 | }\r | |
4308 | \r | |
4309 | VmPtr->Ip += 2;\r | |
4310 | return EFI_SUCCESS;\r | |
4311 | }\r | |
4312 | \r | |
53c71d09 | 4313 | \r |
fb0b259e | 4314 | /**\r |
8e3bc754 | 4315 | Execute the EBC STORESP instruction.\r |
53c71d09 | 4316 | \r |
8e3bc754 | 4317 | Instruction syntax:\r |
4318 | STORESP Rx, FLAGS|IP\r | |
53c71d09 | 4319 | \r |
8e3bc754 | 4320 | @param VmPtr A pointer to a VM context.\r |
4321 | \r | |
34e4e297 | 4322 | @retval EFI_UNSUPPORTED The opcodes/operands is not supported.\r |
8e3bc754 | 4323 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
53c71d09 | 4324 | \r |
fb0b259e | 4325 | **/\r |
fb0b259e | 4326 | EFI_STATUS\r |
4327 | ExecuteSTORESP (\r | |
4328 | IN VM_CONTEXT *VmPtr\r | |
4329 | )\r | |
53c71d09 | 4330 | {\r |
4331 | UINT8 Operands;\r | |
4332 | \r | |
4333 | //\r | |
4334 | // Get the operands\r | |
4335 | //\r | |
4336 | Operands = GETOPERANDS (VmPtr);\r | |
4337 | \r | |
4338 | //\r | |
4339 | // Do the operation\r | |
4340 | //\r | |
4341 | switch (OPERAND2_REGNUM (Operands)) {\r | |
4342 | //\r | |
4343 | // Get flags\r | |
4344 | //\r | |
4345 | case 0:\r | |
4346 | //\r | |
4347 | // Retrieve the value in the flags register, then clear reserved bits\r | |
4348 | //\r | |
1ccdbf2a | 4349 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (UINT64) (VmPtr->Flags & VMFLAGS_ALL_VALID);\r |
53c71d09 | 4350 | break;\r |
4351 | \r | |
4352 | //\r | |
4353 | // Get IP -- address of following instruction\r | |
4354 | //\r | |
4355 | case 1:\r | |
1ccdbf2a | 4356 | VmPtr->Gpr[OPERAND1_REGNUM (Operands)] = (UINT64) (UINTN) VmPtr->Ip + 2;\r |
53c71d09 | 4357 | break;\r |
4358 | \r | |
4359 | default:\r | |
4360 | EbcDebugSignalException (\r | |
4361 | EXCEPT_EBC_INSTRUCTION_ENCODING,\r | |
4362 | EXCEPTION_FLAG_WARNING,\r | |
4363 | VmPtr\r | |
4364 | );\r | |
4365 | VmPtr->Ip += 2;\r | |
4366 | return EFI_UNSUPPORTED;\r | |
4367 | break;\r | |
4368 | }\r | |
4369 | \r | |
4370 | VmPtr->Ip += 2;\r | |
4371 | return EFI_SUCCESS;\r | |
4372 | }\r | |
4373 | \r | |
fb0b259e | 4374 | \r |
4375 | /**\r | |
4376 | Decode a 16-bit index to determine the offset. Given an index value:\r | |
8e3bc754 | 4377 | \r |
4378 | b15 - sign bit\r | |
4379 | b14:12 - number of bits in this index assigned to natural units (=a)\r | |
4380 | ba:11 - constant units = ConstUnits\r | |
4381 | b0:a - natural units = NaturalUnits\r | |
34e4e297 | 4382 | \r |
fb0b259e | 4383 | Given this info, the offset can be computed by:\r |
8e3bc754 | 4384 | offset = sign_bit * (ConstUnits + NaturalUnits * sizeof(UINTN))\r |
4385 | \r | |
fb0b259e | 4386 | Max offset is achieved with index = 0x7FFF giving an offset of\r |
4387 | 0x27B (32-bit machine) or 0x477 (64-bit machine).\r | |
34e4e297 | 4388 | Min offset is achieved with index =\r |
fb0b259e | 4389 | \r |
8e3bc754 | 4390 | @param VmPtr A pointer to VM context.\r |
4391 | @param CodeOffset Offset from IP of the location of the 16-bit index\r | |
4392 | to decode.\r | |
fb0b259e | 4393 | \r |
4394 | @return The decoded offset.\r | |
4395 | \r | |
4396 | **/\r | |
53c71d09 | 4397 | INT16\r |
4398 | VmReadIndex16 (\r | |
4399 | IN VM_CONTEXT *VmPtr,\r | |
4400 | IN UINT32 CodeOffset\r | |
4401 | )\r | |
53c71d09 | 4402 | {\r |
4403 | UINT16 Index;\r | |
4404 | INT16 Offset;\r | |
8e3bc754 | 4405 | INT16 ConstUnits;\r |
4406 | INT16 NaturalUnits;\r | |
53c71d09 | 4407 | INT16 NBits;\r |
4408 | INT16 Mask;\r | |
4409 | \r | |
4410 | //\r | |
4411 | // First read the index from the code stream\r | |
4412 | //\r | |
4413 | Index = VmReadCode16 (VmPtr, CodeOffset);\r | |
4414 | \r | |
4415 | //\r | |
8e3bc754 | 4416 | // Get the mask for NaturalUnits. First get the number of bits from the index.\r |
53c71d09 | 4417 | //\r |
4418 | NBits = (INT16) ((Index & 0x7000) >> 12);\r | |
4419 | \r | |
4420 | //\r | |
4421 | // Scale it for 16-bit indexes\r | |
4422 | //\r | |
4423 | NBits *= 2;\r | |
4424 | \r | |
4425 | //\r | |
4426 | // Now using the number of bits, create a mask.\r | |
4427 | //\r | |
4428 | Mask = (INT16) ((INT16)~0 << NBits);\r | |
4429 | \r | |
4430 | //\r | |
8e3bc754 | 4431 | // Now using the mask, extract NaturalUnits from the lower bits of the index.\r |
53c71d09 | 4432 | //\r |
8e3bc754 | 4433 | NaturalUnits = (INT16) (Index &~Mask);\r |
53c71d09 | 4434 | \r |
4435 | //\r | |
8e3bc754 | 4436 | // Now compute ConstUnits\r |
53c71d09 | 4437 | //\r |
8e3bc754 | 4438 | ConstUnits = (INT16) (((Index &~0xF000) & Mask) >> NBits);\r |
53c71d09 | 4439 | \r |
8e3bc754 | 4440 | Offset = (INT16) (NaturalUnits * sizeof (UINTN) + ConstUnits);\r |
53c71d09 | 4441 | \r |
4442 | //\r | |
4443 | // Now set the sign\r | |
4444 | //\r | |
366219ab | 4445 | if ((Index & 0x8000) != 0) {\r |
53c71d09 | 4446 | //\r |
4447 | // Do it the hard way to work around a bogus compiler warning\r | |
4448 | //\r | |
4449 | // Offset = -1 * Offset;\r | |
4450 | //\r | |
4451 | Offset = (INT16) ((INT32) Offset * -1);\r | |
4452 | }\r | |
4453 | \r | |
4454 | return Offset;\r | |
4455 | }\r | |
4456 | \r | |
fb0b259e | 4457 | \r |
4458 | /**\r | |
4459 | Decode a 32-bit index to determine the offset.\r | |
4460 | \r | |
8e3bc754 | 4461 | @param VmPtr A pointer to VM context.\r |
4462 | @param CodeOffset Offset from IP of the location of the 32-bit index\r | |
4463 | to decode.\r | |
fb0b259e | 4464 | \r |
8e3bc754 | 4465 | @return Converted index per EBC VM specification.\r |
fb0b259e | 4466 | \r |
4467 | **/\r | |
53c71d09 | 4468 | INT32\r |
4469 | VmReadIndex32 (\r | |
4470 | IN VM_CONTEXT *VmPtr,\r | |
4471 | IN UINT32 CodeOffset\r | |
4472 | )\r | |
53c71d09 | 4473 | {\r |
4474 | UINT32 Index;\r | |
4475 | INT32 Offset;\r | |
8e3bc754 | 4476 | INT32 ConstUnits;\r |
4477 | INT32 NaturalUnits;\r | |
53c71d09 | 4478 | INT32 NBits;\r |
4479 | INT32 Mask;\r | |
4480 | \r | |
4481 | Index = VmReadImmed32 (VmPtr, CodeOffset);\r | |
4482 | \r | |
4483 | //\r | |
8e3bc754 | 4484 | // Get the mask for NaturalUnits. First get the number of bits from the index.\r |
53c71d09 | 4485 | //\r |
4486 | NBits = (Index & 0x70000000) >> 28;\r | |
4487 | \r | |
4488 | //\r | |
4489 | // Scale it for 32-bit indexes\r | |
4490 | //\r | |
4491 | NBits *= 4;\r | |
4492 | \r | |
4493 | //\r | |
4494 | // Now using the number of bits, create a mask.\r | |
4495 | //\r | |
4496 | Mask = (INT32)~0 << NBits;\r | |
4497 | \r | |
4498 | //\r | |
8e3bc754 | 4499 | // Now using the mask, extract NaturalUnits from the lower bits of the index.\r |
53c71d09 | 4500 | //\r |
8e3bc754 | 4501 | NaturalUnits = Index &~Mask;\r |
53c71d09 | 4502 | \r |
4503 | //\r | |
8e3bc754 | 4504 | // Now compute ConstUnits\r |
53c71d09 | 4505 | //\r |
8e3bc754 | 4506 | ConstUnits = ((Index &~0xF0000000) & Mask) >> NBits;\r |
53c71d09 | 4507 | \r |
8e3bc754 | 4508 | Offset = NaturalUnits * sizeof (UINTN) + ConstUnits;\r |
53c71d09 | 4509 | \r |
4510 | //\r | |
4511 | // Now set the sign\r | |
4512 | //\r | |
366219ab | 4513 | if ((Index & 0x80000000) != 0) {\r |
53c71d09 | 4514 | Offset = Offset * -1;\r |
4515 | }\r | |
4516 | \r | |
4517 | return Offset;\r | |
4518 | }\r | |
4519 | \r | |
fb0b259e | 4520 | \r |
4521 | /**\r | |
4522 | Decode a 64-bit index to determine the offset.\r | |
4523 | \r | |
8e3bc754 | 4524 | @param VmPtr A pointer to VM context.s\r |
4525 | @param CodeOffset Offset from IP of the location of the 64-bit index\r | |
4526 | to decode.\r | |
fb0b259e | 4527 | \r |
4528 | @return Converted index per EBC VM specification\r | |
4529 | \r | |
4530 | **/\r | |
53c71d09 | 4531 | INT64\r |
4532 | VmReadIndex64 (\r | |
4533 | IN VM_CONTEXT *VmPtr,\r | |
4534 | IN UINT32 CodeOffset\r | |
4535 | )\r | |
53c71d09 | 4536 | {\r |
4537 | UINT64 Index;\r | |
4538 | INT64 Offset;\r | |
8e3bc754 | 4539 | INT64 ConstUnits;\r |
4540 | INT64 NaturalUnits;\r | |
53c71d09 | 4541 | INT64 NBits;\r |
4542 | INT64 Mask;\r | |
4543 | \r | |
4544 | Index = VmReadCode64 (VmPtr, CodeOffset);\r | |
4545 | \r | |
4546 | //\r | |
8e3bc754 | 4547 | // Get the mask for NaturalUnits. First get the number of bits from the index.\r |
53c71d09 | 4548 | //\r |
4549 | NBits = RShiftU64 ((Index & 0x7000000000000000ULL), 60);\r | |
4550 | \r | |
4551 | //\r | |
4552 | // Scale it for 64-bit indexes (multiply by 8 by shifting left 3)\r | |
4553 | //\r | |
4554 | NBits = LShiftU64 ((UINT64)NBits, 3);\r | |
4555 | \r | |
4556 | //\r | |
4557 | // Now using the number of bits, create a mask.\r | |
4558 | //\r | |
4559 | Mask = (LShiftU64 ((UINT64)~0, (UINTN)NBits));\r | |
4560 | \r | |
4561 | //\r | |
8e3bc754 | 4562 | // Now using the mask, extract NaturalUnits from the lower bits of the index.\r |
53c71d09 | 4563 | //\r |
8e3bc754 | 4564 | NaturalUnits = Index &~Mask;\r |
53c71d09 | 4565 | \r |
4566 | //\r | |
8e3bc754 | 4567 | // Now compute ConstUnits\r |
53c71d09 | 4568 | //\r |
8e3bc754 | 4569 | ConstUnits = ARShiftU64 (((Index &~0xF000000000000000ULL) & Mask), (UINTN)NBits);\r |
53c71d09 | 4570 | \r |
c9325700 | 4571 | Offset = MultU64x64 ((UINT64) NaturalUnits, sizeof (UINTN)) + ConstUnits;\r |
53c71d09 | 4572 | \r |
4573 | //\r | |
4574 | // Now set the sign\r | |
4575 | //\r | |
366219ab | 4576 | if ((Index & 0x8000000000000000ULL) != 0) {\r |
53c71d09 | 4577 | Offset = MultS64x64 (Offset, -1);\r |
4578 | }\r | |
4579 | \r | |
4580 | return Offset;\r | |
4581 | }\r | |
4582 | \r | |
53c71d09 | 4583 | \r |
fb0b259e | 4584 | /**\r |
8e3bc754 | 4585 | Writes 8-bit data to memory address.\r |
34e4e297 | 4586 | \r |
8e3bc754 | 4587 | This routine is called by the EBC data\r |
53c71d09 | 4588 | movement instructions that write to memory. Since these writes\r |
4589 | may be to the stack, which looks like (high address on top) this,\r | |
8e3bc754 | 4590 | \r |
53c71d09 | 4591 | [EBC entry point arguments]\r |
4592 | [VM stack]\r | |
4593 | [EBC stack]\r | |
8e3bc754 | 4594 | \r |
53c71d09 | 4595 | we need to detect all attempts to write to the EBC entry point argument\r |
34e4e297 | 4596 | stack area and adjust the address (which will initially point into the\r |
53c71d09 | 4597 | VM stack) to point into the EBC entry point arguments.\r |
4598 | \r | |
8e3bc754 | 4599 | @param VmPtr A pointer to a VM context.\r |
48557c65 | 4600 | @param Addr Address to write to.\r |
8e3bc754 | 4601 | @param Data Value to write to Addr.\r |
fb0b259e | 4602 | \r |
34e4e297 | 4603 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
8e3bc754 | 4604 | @retval Other Some error occurs when writing data to the address.\r |
53c71d09 | 4605 | \r |
fb0b259e | 4606 | **/\r |
fb0b259e | 4607 | EFI_STATUS\r |
4608 | VmWriteMem8 (\r | |
4609 | IN VM_CONTEXT *VmPtr,\r | |
4610 | IN UINTN Addr,\r | |
4611 | IN UINT8 Data\r | |
4612 | )\r | |
53c71d09 | 4613 | {\r |
4614 | //\r | |
4615 | // Convert the address if it's in the stack gap\r | |
4616 | //\r | |
4617 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4618 | *(UINT8 *) Addr = Data;\r | |
4619 | return EFI_SUCCESS;\r | |
4620 | }\r | |
4621 | \r | |
8e3bc754 | 4622 | /**\r |
4623 | Writes 16-bit data to memory address.\r | |
34e4e297 | 4624 | \r |
8e3bc754 | 4625 | This routine is called by the EBC data\r |
4626 | movement instructions that write to memory. Since these writes\r | |
4627 | may be to the stack, which looks like (high address on top) this,\r | |
4628 | \r | |
4629 | [EBC entry point arguments]\r | |
4630 | [VM stack]\r | |
4631 | [EBC stack]\r | |
4632 | \r | |
4633 | we need to detect all attempts to write to the EBC entry point argument\r | |
34e4e297 | 4634 | stack area and adjust the address (which will initially point into the\r |
8e3bc754 | 4635 | VM stack) to point into the EBC entry point arguments.\r |
4636 | \r | |
4637 | @param VmPtr A pointer to a VM context.\r | |
48557c65 | 4638 | @param Addr Address to write to.\r |
8e3bc754 | 4639 | @param Data Value to write to Addr.\r |
4640 | \r | |
34e4e297 | 4641 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
8e3bc754 | 4642 | @retval Other Some error occurs when writing data to the address.\r |
4643 | \r | |
4644 | **/\r | |
53c71d09 | 4645 | EFI_STATUS\r |
4646 | VmWriteMem16 (\r | |
4647 | IN VM_CONTEXT *VmPtr,\r | |
4648 | IN UINTN Addr,\r | |
4649 | IN UINT16 Data\r | |
4650 | )\r | |
4651 | {\r | |
4652 | EFI_STATUS Status;\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 | \r | |
4659 | //\r | |
4660 | // Do a simple write if aligned\r | |
4661 | //\r | |
4662 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
4663 | *(UINT16 *) Addr = Data;\r | |
4664 | } else {\r | |
4665 | //\r | |
4666 | // Write as two bytes\r | |
4667 | //\r | |
4668 | MemoryFence ();\r | |
4669 | if ((Status = VmWriteMem8 (VmPtr, Addr, (UINT8) Data)) != EFI_SUCCESS) {\r | |
4670 | return Status;\r | |
4671 | }\r | |
4672 | \r | |
4673 | MemoryFence ();\r | |
4674 | if ((Status = VmWriteMem8 (VmPtr, Addr + 1, (UINT8) (Data >> 8))) != EFI_SUCCESS) {\r | |
4675 | return Status;\r | |
4676 | }\r | |
4677 | \r | |
4678 | MemoryFence ();\r | |
4679 | }\r | |
4680 | \r | |
4681 | return EFI_SUCCESS;\r | |
4682 | }\r | |
4683 | \r | |
8e3bc754 | 4684 | \r |
4685 | /**\r | |
4686 | Writes 32-bit data to memory address.\r | |
34e4e297 | 4687 | \r |
8e3bc754 | 4688 | This routine is called by the EBC data\r |
4689 | movement instructions that write to memory. Since these writes\r | |
4690 | may be to the stack, which looks like (high address on top) this,\r | |
4691 | \r | |
4692 | [EBC entry point arguments]\r | |
4693 | [VM stack]\r | |
4694 | [EBC stack]\r | |
4695 | \r | |
4696 | we need to detect all attempts to write to the EBC entry point argument\r | |
34e4e297 | 4697 | stack area and adjust the address (which will initially point into the\r |
8e3bc754 | 4698 | VM stack) to point into the EBC entry point arguments.\r |
4699 | \r | |
4700 | @param VmPtr A pointer to a VM context.\r | |
48557c65 | 4701 | @param Addr Address to write to.\r |
8e3bc754 | 4702 | @param Data Value to write to Addr.\r |
4703 | \r | |
34e4e297 | 4704 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
8e3bc754 | 4705 | @retval Other Some error occurs when writing data to the address.\r |
4706 | \r | |
4707 | **/\r | |
53c71d09 | 4708 | EFI_STATUS\r |
4709 | VmWriteMem32 (\r | |
4710 | IN VM_CONTEXT *VmPtr,\r | |
4711 | IN UINTN Addr,\r | |
4712 | IN UINT32 Data\r | |
4713 | )\r | |
4714 | {\r | |
4715 | EFI_STATUS Status;\r | |
4716 | \r | |
4717 | //\r | |
4718 | // Convert the address if it's in the stack gap\r | |
4719 | //\r | |
4720 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4721 | \r | |
4722 | //\r | |
4723 | // Do a simple write if aligned\r | |
4724 | //\r | |
4725 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
4726 | *(UINT32 *) Addr = Data;\r | |
4727 | } else {\r | |
4728 | //\r | |
4729 | // Write as two words\r | |
4730 | //\r | |
4731 | MemoryFence ();\r | |
4732 | if ((Status = VmWriteMem16 (VmPtr, Addr, (UINT16) Data)) != EFI_SUCCESS) {\r | |
4733 | return Status;\r | |
4734 | }\r | |
4735 | \r | |
4736 | MemoryFence ();\r | |
4737 | if ((Status = VmWriteMem16 (VmPtr, Addr + sizeof (UINT16), (UINT16) (Data >> 16))) != EFI_SUCCESS) {\r | |
4738 | return Status;\r | |
4739 | }\r | |
4740 | \r | |
4741 | MemoryFence ();\r | |
4742 | }\r | |
4743 | \r | |
4744 | return EFI_SUCCESS;\r | |
4745 | }\r | |
4746 | \r | |
8e3bc754 | 4747 | \r |
4748 | /**\r | |
4749 | Writes 64-bit data to memory address.\r | |
34e4e297 | 4750 | \r |
8e3bc754 | 4751 | This routine is called by the EBC data\r |
4752 | movement instructions that write to memory. Since these writes\r | |
4753 | may be to the stack, which looks like (high address on top) this,\r | |
4754 | \r | |
4755 | [EBC entry point arguments]\r | |
4756 | [VM stack]\r | |
4757 | [EBC stack]\r | |
4758 | \r | |
4759 | we need to detect all attempts to write to the EBC entry point argument\r | |
34e4e297 | 4760 | stack area and adjust the address (which will initially point into the\r |
8e3bc754 | 4761 | VM stack) to point into the EBC entry point arguments.\r |
4762 | \r | |
4763 | @param VmPtr A pointer to a VM context.\r | |
48557c65 | 4764 | @param Addr Address to write to.\r |
8e3bc754 | 4765 | @param Data Value to write to Addr.\r |
4766 | \r | |
34e4e297 | 4767 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
8e3bc754 | 4768 | @retval Other Some error occurs when writing data to the address.\r |
4769 | \r | |
4770 | **/\r | |
53c71d09 | 4771 | EFI_STATUS\r |
4772 | VmWriteMem64 (\r | |
4773 | IN VM_CONTEXT *VmPtr,\r | |
4774 | IN UINTN Addr,\r | |
4775 | IN UINT64 Data\r | |
4776 | )\r | |
4777 | {\r | |
4778 | EFI_STATUS Status;\r | |
53c71d09 | 4779 | \r |
4780 | //\r | |
4781 | // Convert the address if it's in the stack gap\r | |
4782 | //\r | |
4783 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4784 | \r | |
4785 | //\r | |
4786 | // Do a simple write if aligned\r | |
4787 | //\r | |
4788 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
4789 | *(UINT64 *) Addr = Data;\r | |
4790 | } else {\r | |
4791 | //\r | |
4792 | // Write as two 32-bit words\r | |
4793 | //\r | |
4794 | MemoryFence ();\r | |
4795 | if ((Status = VmWriteMem32 (VmPtr, Addr, (UINT32) Data)) != EFI_SUCCESS) {\r | |
4796 | return Status;\r | |
4797 | }\r | |
4798 | \r | |
4799 | MemoryFence ();\r | |
c9325700 | 4800 | if ((Status = VmWriteMem32 (VmPtr, Addr + sizeof (UINT32), (UINT32) RShiftU64(Data, 32))) != EFI_SUCCESS) {\r |
53c71d09 | 4801 | return Status;\r |
4802 | }\r | |
4803 | \r | |
4804 | MemoryFence ();\r | |
4805 | }\r | |
4806 | \r | |
4807 | return EFI_SUCCESS;\r | |
4808 | }\r | |
4809 | \r | |
8e3bc754 | 4810 | \r |
4811 | /**\r | |
4812 | Writes UINTN data to memory address.\r | |
34e4e297 | 4813 | \r |
8e3bc754 | 4814 | This routine is called by the EBC data\r |
4815 | movement instructions that write to memory. Since these writes\r | |
4816 | may be to the stack, which looks like (high address on top) this,\r | |
4817 | \r | |
4818 | [EBC entry point arguments]\r | |
4819 | [VM stack]\r | |
4820 | [EBC stack]\r | |
4821 | \r | |
4822 | we need to detect all attempts to write to the EBC entry point argument\r | |
34e4e297 | 4823 | stack area and adjust the address (which will initially point into the\r |
8e3bc754 | 4824 | VM stack) to point into the EBC entry point arguments.\r |
4825 | \r | |
4826 | @param VmPtr A pointer to a VM context.\r | |
48557c65 | 4827 | @param Addr Address to write to.\r |
8e3bc754 | 4828 | @param Data Value to write to Addr.\r |
4829 | \r | |
34e4e297 | 4830 | @retval EFI_SUCCESS The instruction is executed successfully.\r |
8e3bc754 | 4831 | @retval Other Some error occurs when writing data to the address.\r |
4832 | \r | |
4833 | **/\r | |
53c71d09 | 4834 | EFI_STATUS\r |
4835 | VmWriteMemN (\r | |
4836 | IN VM_CONTEXT *VmPtr,\r | |
4837 | IN UINTN Addr,\r | |
4838 | IN UINTN Data\r | |
4839 | )\r | |
4840 | {\r | |
4841 | EFI_STATUS Status;\r | |
4842 | UINTN Index;\r | |
4843 | \r | |
4844 | Status = EFI_SUCCESS;\r | |
4845 | \r | |
4846 | //\r | |
4847 | // Convert the address if it's in the stack gap\r | |
4848 | //\r | |
4849 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
4850 | \r | |
4851 | //\r | |
4852 | // Do a simple write if aligned\r | |
4853 | //\r | |
4854 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
4855 | *(UINTN *) Addr = Data;\r | |
4856 | } else {\r | |
4857 | for (Index = 0; Index < sizeof (UINTN) / sizeof (UINT32); Index++) {\r | |
4858 | MemoryFence ();\r | |
4859 | Status = VmWriteMem32 (VmPtr, Addr + Index * sizeof (UINT32), (UINT32) Data);\r | |
4860 | MemoryFence ();\r | |
34e4e297 | 4861 | Data = (UINTN) RShiftU64 ((UINT64)Data, 32);\r |
53c71d09 | 4862 | }\r |
4863 | }\r | |
4864 | \r | |
4865 | return Status;\r | |
4866 | }\r | |
4867 | \r | |
53c71d09 | 4868 | \r |
fb0b259e | 4869 | /**\r |
8e3bc754 | 4870 | Reads 8-bit immediate value at the offset.\r |
4871 | \r | |
4872 | This routine is called by the EBC execute\r | |
53c71d09 | 4873 | functions to read EBC immediate values from the code stream.\r |
fb0b259e | 4874 | Since we can't assume alignment, each tries to read in the biggest\r |
53c71d09 | 4875 | chunks size available, but will revert to smaller reads if necessary.\r |
4876 | \r | |
8e3bc754 | 4877 | @param VmPtr A pointer to a VM context.\r |
fb0b259e | 4878 | @param Offset offset from IP of the code bytes to read.\r |
53c71d09 | 4879 | \r |
fb0b259e | 4880 | @return Signed data of the requested size from the specified address.\r |
53c71d09 | 4881 | \r |
fb0b259e | 4882 | **/\r |
fb0b259e | 4883 | INT8\r |
4884 | VmReadImmed8 (\r | |
4885 | IN VM_CONTEXT *VmPtr,\r | |
4886 | IN UINT32 Offset\r | |
4887 | )\r | |
53c71d09 | 4888 | {\r |
4889 | //\r | |
4890 | // Simply return the data in flat memory space\r | |
4891 | //\r | |
4892 | return * (INT8 *) (VmPtr->Ip + Offset);\r | |
4893 | }\r | |
4894 | \r | |
8e3bc754 | 4895 | /**\r |
4896 | Reads 16-bit immediate value at the offset.\r | |
4897 | \r | |
4898 | This routine is called by the EBC execute\r | |
4899 | functions to read EBC immediate values from the code stream.\r | |
4900 | Since we can't assume alignment, each tries to read in the biggest\r | |
4901 | chunks size available, but will revert to smaller reads if necessary.\r | |
4902 | \r | |
4903 | @param VmPtr A pointer to a VM context.\r | |
4904 | @param Offset offset from IP of the code bytes to read.\r | |
4905 | \r | |
4906 | @return Signed data of the requested size from the specified address.\r | |
4907 | \r | |
4908 | **/\r | |
53c71d09 | 4909 | INT16\r |
4910 | VmReadImmed16 (\r | |
4911 | IN VM_CONTEXT *VmPtr,\r | |
4912 | IN UINT32 Offset\r | |
4913 | )\r | |
4914 | {\r | |
4915 | //\r | |
4916 | // Read direct if aligned\r | |
4917 | //\r | |
4918 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (INT16))) {\r | |
4919 | return * (INT16 *) (VmPtr->Ip + Offset);\r | |
4920 | } else {\r | |
4921 | //\r | |
4922 | // All code word reads should be aligned\r | |
4923 | //\r | |
4924 | EbcDebugSignalException (\r | |
4925 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
4926 | EXCEPTION_FLAG_WARNING,\r | |
4927 | VmPtr\r | |
4928 | );\r | |
4929 | }\r | |
4930 | //\r | |
4931 | // Return unaligned data\r | |
4932 | //\r | |
4933 | return (INT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
4934 | }\r | |
4935 | \r | |
8e3bc754 | 4936 | \r |
4937 | /**\r | |
4938 | Reads 32-bit immediate value at the offset.\r | |
4939 | \r | |
4940 | This routine is called by the EBC execute\r | |
4941 | functions to read EBC immediate values from the code stream.\r | |
4942 | Since we can't assume alignment, each tries to read in the biggest\r | |
4943 | chunks size available, but will revert to smaller reads if necessary.\r | |
4944 | \r | |
4945 | @param VmPtr A pointer to a VM context.\r | |
4946 | @param Offset offset from IP of the code bytes to read.\r | |
4947 | \r | |
4948 | @return Signed data of the requested size from the specified address.\r | |
4949 | \r | |
4950 | **/\r | |
53c71d09 | 4951 | INT32\r |
4952 | VmReadImmed32 (\r | |
4953 | IN VM_CONTEXT *VmPtr,\r | |
4954 | IN UINT32 Offset\r | |
4955 | )\r | |
4956 | {\r | |
4957 | UINT32 Data;\r | |
4958 | \r | |
4959 | //\r | |
4960 | // Read direct if aligned\r | |
4961 | //\r | |
4962 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
4963 | return * (INT32 *) (VmPtr->Ip + Offset);\r | |
4964 | }\r | |
4965 | //\r | |
4966 | // Return unaligned data\r | |
4967 | //\r | |
34e4e297 | 4968 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r |
4969 | Data |= (UINT32)(VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
53c71d09 | 4970 | return Data;\r |
4971 | }\r | |
4972 | \r | |
8e3bc754 | 4973 | \r |
4974 | /**\r | |
4975 | Reads 64-bit immediate value at the offset.\r | |
4976 | \r | |
4977 | This routine is called by the EBC execute\r | |
4978 | functions to read EBC immediate values from the code stream.\r | |
4979 | Since we can't assume alignment, each tries to read in the biggest\r | |
4980 | chunks size available, but will revert to smaller reads if necessary.\r | |
4981 | \r | |
4982 | @param VmPtr A pointer to a VM context.\r | |
4983 | @param Offset offset from IP of the code bytes to read.\r | |
4984 | \r | |
4985 | @return Signed data of the requested size from the specified address.\r | |
4986 | \r | |
4987 | **/\r | |
53c71d09 | 4988 | INT64\r |
4989 | VmReadImmed64 (\r | |
4990 | IN VM_CONTEXT *VmPtr,\r | |
4991 | IN UINT32 Offset\r | |
4992 | )\r | |
4993 | {\r | |
4994 | UINT64 Data64;\r | |
4995 | UINT32 Data32;\r | |
4996 | UINT8 *Ptr;\r | |
4997 | \r | |
4998 | //\r | |
4999 | // Read direct if aligned\r | |
5000 | //\r | |
5001 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
5002 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
5003 | }\r | |
5004 | //\r | |
5005 | // Return unaligned data.\r | |
5006 | //\r | |
5007 | Ptr = (UINT8 *) &Data64;\r | |
5008 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
5009 | *(UINT32 *) Ptr = Data32;\r | |
34e4e297 | 5010 | Ptr += sizeof (Data32);\r |
53c71d09 | 5011 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r |
5012 | *(UINT32 *) Ptr = Data32;\r | |
5013 | return Data64;\r | |
5014 | }\r | |
5015 | \r | |
fb0b259e | 5016 | \r |
5017 | /**\r | |
48557c65 | 5018 | Reads 16-bit unsigned data from the code stream.\r |
8e3bc754 | 5019 | \r |
5020 | This routine provides the ability to read raw unsigned data from the code\r | |
5021 | stream.\r | |
fb0b259e | 5022 | \r |
8e3bc754 | 5023 | @param VmPtr A pointer to VM context\r |
5024 | @param Offset Offset from current IP to the raw data to read.\r | |
fb0b259e | 5025 | \r |
5026 | @return The raw unsigned 16-bit value from the code stream.\r | |
5027 | \r | |
5028 | **/\r | |
53c71d09 | 5029 | UINT16\r |
5030 | VmReadCode16 (\r | |
5031 | IN VM_CONTEXT *VmPtr,\r | |
5032 | IN UINT32 Offset\r | |
5033 | )\r | |
53c71d09 | 5034 | {\r |
5035 | //\r | |
5036 | // Read direct if aligned\r | |
5037 | //\r | |
5038 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT16))) {\r | |
5039 | return * (UINT16 *) (VmPtr->Ip + Offset);\r | |
5040 | } else {\r | |
5041 | //\r | |
5042 | // All code word reads should be aligned\r | |
5043 | //\r | |
5044 | EbcDebugSignalException (\r | |
5045 | EXCEPT_EBC_ALIGNMENT_CHECK,\r | |
5046 | EXCEPTION_FLAG_WARNING,\r | |
5047 | VmPtr\r | |
5048 | );\r | |
5049 | }\r | |
5050 | //\r | |
5051 | // Return unaligned data\r | |
5052 | //\r | |
5053 | return (UINT16) (*(UINT8 *) (VmPtr->Ip + Offset) + (*(UINT8 *) (VmPtr->Ip + Offset + 1) << 8));\r | |
5054 | }\r | |
5055 | \r | |
8e3bc754 | 5056 | \r |
5057 | /**\r | |
48557c65 | 5058 | Reads 32-bit unsigned data from the code stream.\r |
8e3bc754 | 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 32-bit value from the code stream.\r | |
5067 | \r | |
5068 | **/\r | |
53c71d09 | 5069 | UINT32\r |
5070 | VmReadCode32 (\r | |
5071 | IN VM_CONTEXT *VmPtr,\r | |
5072 | IN UINT32 Offset\r | |
5073 | )\r | |
5074 | {\r | |
5075 | UINT32 Data;\r | |
5076 | //\r | |
5077 | // Read direct if aligned\r | |
5078 | //\r | |
5079 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT32))) {\r | |
5080 | return * (UINT32 *) (VmPtr->Ip + Offset);\r | |
5081 | }\r | |
5082 | //\r | |
5083 | // Return unaligned data\r | |
5084 | //\r | |
5085 | Data = (UINT32) VmReadCode16 (VmPtr, Offset);\r | |
5086 | Data |= (VmReadCode16 (VmPtr, Offset + 2) << 16);\r | |
5087 | return Data;\r | |
5088 | }\r | |
5089 | \r | |
8e3bc754 | 5090 | \r |
5091 | /**\r | |
48557c65 | 5092 | Reads 64-bit unsigned data from the code stream.\r |
8e3bc754 | 5093 | \r |
5094 | This routine provides the ability to read raw unsigned data from the code\r | |
5095 | stream.\r | |
5096 | \r | |
5097 | @param VmPtr A pointer to VM context\r | |
5098 | @param Offset Offset from current IP to the raw data to read.\r | |
5099 | \r | |
5100 | @return The raw unsigned 64-bit value from the code stream.\r | |
5101 | \r | |
5102 | **/\r | |
53c71d09 | 5103 | UINT64\r |
5104 | VmReadCode64 (\r | |
5105 | IN VM_CONTEXT *VmPtr,\r | |
5106 | IN UINT32 Offset\r | |
5107 | )\r | |
5108 | {\r | |
5109 | UINT64 Data64;\r | |
5110 | UINT32 Data32;\r | |
5111 | UINT8 *Ptr;\r | |
5112 | \r | |
5113 | //\r | |
5114 | // Read direct if aligned\r | |
5115 | //\r | |
5116 | if (IS_ALIGNED ((UINTN) VmPtr->Ip + Offset, sizeof (UINT64))) {\r | |
5117 | return * (UINT64 *) (VmPtr->Ip + Offset);\r | |
5118 | }\r | |
5119 | //\r | |
5120 | // Return unaligned data.\r | |
5121 | //\r | |
5122 | Ptr = (UINT8 *) &Data64;\r | |
5123 | Data32 = VmReadCode32 (VmPtr, Offset);\r | |
5124 | *(UINT32 *) Ptr = Data32;\r | |
34e4e297 | 5125 | Ptr += sizeof (Data32);\r |
53c71d09 | 5126 | Data32 = VmReadCode32 (VmPtr, Offset + sizeof (UINT32));\r |
5127 | *(UINT32 *) Ptr = Data32;\r | |
5128 | return Data64;\r | |
5129 | }\r | |
5130 | \r | |
8e3bc754 | 5131 | \r |
5132 | /**\r | |
5133 | Reads 8-bit data form the memory address.\r | |
5134 | \r | |
5135 | @param VmPtr A pointer to VM context.\r | |
5136 | @param Addr The memory address.\r | |
5137 | \r | |
48557c65 | 5138 | @return The 8-bit value from the memory address.\r |
8e3bc754 | 5139 | \r |
5140 | **/\r | |
53c71d09 | 5141 | UINT8\r |
5142 | VmReadMem8 (\r | |
5143 | IN VM_CONTEXT *VmPtr,\r | |
5144 | IN UINTN Addr\r | |
5145 | )\r | |
5146 | {\r | |
5147 | //\r | |
5148 | // Convert the address if it's in the stack gap\r | |
5149 | //\r | |
5150 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5151 | //\r | |
5152 | // Simply return the data in flat memory space\r | |
5153 | //\r | |
5154 | return * (UINT8 *) Addr;\r | |
5155 | }\r | |
5156 | \r | |
8e3bc754 | 5157 | /**\r |
5158 | Reads 16-bit data form the memory address.\r | |
5159 | \r | |
5160 | @param VmPtr A pointer to VM context.\r | |
5161 | @param Addr The memory address.\r | |
5162 | \r | |
48557c65 | 5163 | @return The 16-bit value from the memory address.\r |
8e3bc754 | 5164 | \r |
5165 | **/\r | |
53c71d09 | 5166 | UINT16\r |
5167 | VmReadMem16 (\r | |
5168 | IN VM_CONTEXT *VmPtr,\r | |
5169 | IN UINTN Addr\r | |
5170 | )\r | |
5171 | {\r | |
5172 | //\r | |
5173 | // Convert the address if it's in the stack gap\r | |
5174 | //\r | |
5175 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5176 | //\r | |
5177 | // Read direct if aligned\r | |
5178 | //\r | |
5179 | if (IS_ALIGNED (Addr, sizeof (UINT16))) {\r | |
5180 | return * (UINT16 *) Addr;\r | |
5181 | }\r | |
5182 | //\r | |
5183 | // Return unaligned data\r | |
5184 | //\r | |
5185 | return (UINT16) (*(UINT8 *) Addr + (*(UINT8 *) (Addr + 1) << 8));\r | |
5186 | }\r | |
5187 | \r | |
8e3bc754 | 5188 | /**\r |
5189 | Reads 32-bit data form the memory address.\r | |
5190 | \r | |
5191 | @param VmPtr A pointer to VM context.\r | |
5192 | @param Addr The memory address.\r | |
5193 | \r | |
48557c65 | 5194 | @return The 32-bit value from the memory address.\r |
8e3bc754 | 5195 | \r |
5196 | **/\r | |
53c71d09 | 5197 | UINT32\r |
5198 | VmReadMem32 (\r | |
5199 | IN VM_CONTEXT *VmPtr,\r | |
5200 | IN UINTN Addr\r | |
5201 | )\r | |
5202 | {\r | |
5203 | UINT32 Data;\r | |
5204 | \r | |
5205 | //\r | |
5206 | // Convert the address if it's in the stack gap\r | |
5207 | //\r | |
5208 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5209 | //\r | |
5210 | // Read direct if aligned\r | |
5211 | //\r | |
5212 | if (IS_ALIGNED (Addr, sizeof (UINT32))) {\r | |
5213 | return * (UINT32 *) Addr;\r | |
5214 | }\r | |
5215 | //\r | |
5216 | // Return unaligned data\r | |
5217 | //\r | |
5218 | Data = (UINT32) VmReadMem16 (VmPtr, Addr);\r | |
5219 | Data |= (VmReadMem16 (VmPtr, Addr + 2) << 16);\r | |
5220 | return Data;\r | |
5221 | }\r | |
5222 | \r | |
8e3bc754 | 5223 | /**\r |
5224 | Reads 64-bit data form the memory address.\r | |
5225 | \r | |
5226 | @param VmPtr A pointer to VM context.\r | |
5227 | @param Addr The memory address.\r | |
5228 | \r | |
48557c65 | 5229 | @return The 64-bit value from the memory address.\r |
8e3bc754 | 5230 | \r |
5231 | **/\r | |
53c71d09 | 5232 | UINT64\r |
5233 | VmReadMem64 (\r | |
5234 | IN VM_CONTEXT *VmPtr,\r | |
5235 | IN UINTN Addr\r | |
5236 | )\r | |
5237 | {\r | |
5238 | UINT64 Data;\r | |
5239 | UINT32 Data32;\r | |
5240 | \r | |
5241 | //\r | |
5242 | // Convert the address if it's in the stack gap\r | |
5243 | //\r | |
5244 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5245 | \r | |
5246 | //\r | |
5247 | // Read direct if aligned\r | |
5248 | //\r | |
5249 | if (IS_ALIGNED (Addr, sizeof (UINT64))) {\r | |
5250 | return * (UINT64 *) Addr;\r | |
5251 | }\r | |
5252 | //\r | |
5253 | // Return unaligned data. Assume little endian.\r | |
5254 | //\r | |
c9325700 ED |
5255 | Data32 = VmReadMem32 (VmPtr, Addr);\r |
5256 | Data = (UINT64) VmReadMem32 (VmPtr, Addr + sizeof (UINT32));\r | |
5257 | Data = LShiftU64 (Data, 32) | Data32;\r | |
53c71d09 | 5258 | return Data;\r |
5259 | }\r | |
5260 | \r | |
53c71d09 | 5261 | \r |
fb0b259e | 5262 | /**\r |
53c71d09 | 5263 | Given an address that EBC is going to read from or write to, return\r |
5264 | an appropriate address that accounts for a gap in the stack.\r | |
53c71d09 | 5265 | The stack for this application looks like this (high addr on top)\r |
5266 | [EBC entry point arguments]\r | |
5267 | [VM stack]\r | |
5268 | [EBC stack]\r | |
53c71d09 | 5269 | The EBC assumes that its arguments are at the top of its stack, which\r |
5270 | is where the VM stack is really. Therefore if the EBC does memory\r | |
5271 | accesses into the VM stack area, then we need to convert the address\r | |
5272 | to point to the EBC entry point arguments area. Do this here.\r | |
5273 | \r | |
8e3bc754 | 5274 | @param VmPtr A Pointer to VM context.\r |
5275 | @param Addr Address of interest\r | |
53c71d09 | 5276 | \r |
fb0b259e | 5277 | @return The unchanged address if it's not in the VM stack region. Otherwise,\r |
8e3bc754 | 5278 | adjust for the stack gap and return the modified address.\r |
53c71d09 | 5279 | \r |
fb0b259e | 5280 | **/\r |
fb0b259e | 5281 | UINTN\r |
5282 | ConvertStackAddr (\r | |
5283 | IN VM_CONTEXT *VmPtr,\r | |
5284 | IN UINTN Addr\r | |
5285 | )\r | |
5286 | {\r | |
53c71d09 | 5287 | ASSERT(((Addr < VmPtr->LowStackTop) || (Addr > VmPtr->HighStackBottom)));\r |
5288 | return Addr;\r | |
5289 | }\r | |
5290 | \r | |
fb0b259e | 5291 | \r |
5292 | /**\r | |
5293 | Read a natural value from memory. May or may not be aligned.\r | |
5294 | \r | |
5295 | @param VmPtr current VM context\r | |
5296 | @param Addr the address to read from\r | |
5297 | \r | |
5298 | @return The natural value at address Addr.\r | |
5299 | \r | |
5300 | **/\r | |
53c71d09 | 5301 | UINTN\r |
5302 | VmReadMemN (\r | |
5303 | IN VM_CONTEXT *VmPtr,\r | |
5304 | IN UINTN Addr\r | |
5305 | )\r | |
53c71d09 | 5306 | {\r |
5307 | UINTN Data;\r | |
5308 | volatile UINT32 Size;\r | |
5309 | UINT8 *FromPtr;\r | |
5310 | UINT8 *ToPtr;\r | |
5311 | //\r | |
5312 | // Convert the address if it's in the stack gap\r | |
5313 | //\r | |
5314 | Addr = ConvertStackAddr (VmPtr, Addr);\r | |
5315 | //\r | |
5316 | // Read direct if aligned\r | |
5317 | //\r | |
5318 | if (IS_ALIGNED (Addr, sizeof (UINTN))) {\r | |
5319 | return * (UINTN *) Addr;\r | |
5320 | }\r | |
5321 | //\r | |
5322 | // Return unaligned data\r | |
5323 | //\r | |
5324 | Data = 0;\r | |
5325 | FromPtr = (UINT8 *) Addr;\r | |
5326 | ToPtr = (UINT8 *) &Data;\r | |
5327 | \r | |
5328 | for (Size = 0; Size < sizeof (Data); Size++) {\r | |
5329 | *ToPtr = *FromPtr;\r | |
5330 | ToPtr++;\r | |
5331 | FromPtr++;\r | |
5332 | }\r | |
5333 | \r | |
5334 | return Data;\r | |
5335 | }\r | |
5336 | \r | |
8e3bc754 | 5337 | /**\r |
5338 | Returns the version of the EBC virtual machine.\r | |
34e4e297 | 5339 | \r |
8e3bc754 | 5340 | @return The 64-bit version of EBC virtual machine.\r |
5341 | \r | |
5342 | **/\r | |
53c71d09 | 5343 | UINT64\r |
5344 | GetVmVersion (\r | |
5345 | VOID\r | |
5346 | )\r | |
5347 | {\r | |
5348 | return (UINT64) (((VM_MAJOR_VERSION & 0xFFFF) << 16) | ((VM_MINOR_VERSION & 0xFFFF)));\r | |
5349 | }\r |