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1 | /** @file\r | |
2 | Support a Semi Host file system over a debuggers JTAG\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
5 | Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>\r | |
6 | \r | |
7 | This program and the accompanying materials\r | |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include <Uefi.h>\r | |
18 | \r | |
19 | #include <Guid/FileInfo.h>\r | |
20 | #include <Guid/FileSystemInfo.h>\r | |
21 | #include <Guid/FileSystemVolumeLabelInfo.h>\r | |
22 | \r | |
23 | #include <Library/BaseLib.h>\r | |
24 | #include <Library/BaseMemoryLib.h> \r | |
25 | #include <Library/DebugLib.h>\r | |
26 | #include <Library/MemoryAllocationLib.h>\r | |
27 | #include <Library/SemihostLib.h>\r | |
28 | #include <Library/UefiBootServicesTableLib.h>\r | |
29 | #include <Library/UefiLib.h>\r | |
30 | \r | |
31 | #include <Protocol/DevicePath.h>\r | |
32 | #include <Protocol/SimpleFileSystem.h>\r | |
33 | \r | |
34 | #include "SemihostFs.h"\r | |
35 | \r | |
36 | #define DEFAULT_SEMIHOST_FS_LABEL L"SemihostFs"\r | |
37 | \r | |
38 | STATIC CHAR16 *mSemihostFsLabel;\r | |
39 | \r | |
40 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL gSemihostFs = {\r | |
41 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,\r | |
42 | VolumeOpen\r | |
43 | };\r | |
44 | \r | |
45 | EFI_FILE gSemihostFsFile = {\r | |
46 | EFI_FILE_PROTOCOL_REVISION,\r | |
47 | FileOpen,\r | |
48 | FileClose,\r | |
49 | FileDelete,\r | |
50 | FileRead,\r | |
51 | FileWrite,\r | |
52 | FileGetPosition,\r | |
53 | FileSetPosition,\r | |
54 | FileGetInfo,\r | |
55 | FileSetInfo,\r | |
56 | FileFlush\r | |
57 | };\r | |
58 | \r | |
59 | //\r | |
60 | // Device path for SemiHosting. It contains our autogened Caller ID GUID.\r | |
61 | //\r | |
62 | typedef struct {\r | |
63 | VENDOR_DEVICE_PATH Guid;\r | |
64 | EFI_DEVICE_PATH_PROTOCOL End;\r | |
65 | } SEMIHOST_DEVICE_PATH;\r | |
66 | \r | |
67 | SEMIHOST_DEVICE_PATH gDevicePath = {\r | |
68 | {\r | |
69 | { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, sizeof (VENDOR_DEVICE_PATH), 0 },\r | |
70 | EFI_CALLER_ID_GUID\r | |
71 | },\r | |
72 | { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, sizeof (EFI_DEVICE_PATH_PROTOCOL), 0}\r | |
73 | };\r | |
74 | \r | |
75 | typedef struct {\r | |
76 | LIST_ENTRY Link;\r | |
77 | UINT64 Signature;\r | |
78 | EFI_FILE File;\r | |
79 | CHAR8 *FileName;\r | |
80 | UINT64 OpenMode;\r | |
81 | UINT32 Position;\r | |
82 | UINTN SemihostHandle;\r | |
83 | BOOLEAN IsRoot;\r | |
84 | EFI_FILE_INFO Info;\r | |
85 | } SEMIHOST_FCB;\r | |
86 | \r | |
87 | #define SEMIHOST_FCB_SIGNATURE SIGNATURE_32( 'S', 'H', 'F', 'C' )\r | |
88 | #define SEMIHOST_FCB_FROM_THIS(a) CR(a, SEMIHOST_FCB, File, SEMIHOST_FCB_SIGNATURE)\r | |
89 | #define SEMIHOST_FCB_FROM_LINK(a) CR(a, SEMIHOST_FCB, Link, SEMIHOST_FCB_SIGNATURE);\r | |
90 | \r | |
91 | EFI_HANDLE gInstallHandle = NULL;\r | |
92 | LIST_ENTRY gFileList = INITIALIZE_LIST_HEAD_VARIABLE (gFileList);\r | |
93 | \r | |
94 | SEMIHOST_FCB *\r | |
95 | AllocateFCB (\r | |
96 | VOID\r | |
97 | )\r | |
98 | {\r | |
99 | SEMIHOST_FCB *Fcb = AllocateZeroPool (sizeof (SEMIHOST_FCB));\r | |
100 | \r | |
101 | if (Fcb != NULL) {\r | |
102 | CopyMem (&Fcb->File, &gSemihostFsFile, sizeof (gSemihostFsFile));\r | |
103 | Fcb->Signature = SEMIHOST_FCB_SIGNATURE;\r | |
104 | }\r | |
105 | \r | |
106 | return Fcb;\r | |
107 | }\r | |
108 | \r | |
109 | VOID\r | |
110 | FreeFCB (\r | |
111 | IN SEMIHOST_FCB *Fcb\r | |
112 | )\r | |
113 | {\r | |
114 | // Remove Fcb from gFileList.\r | |
115 | RemoveEntryList (&Fcb->Link);\r | |
116 | \r | |
117 | // To help debugging...\r | |
118 | Fcb->Signature = 0;\r | |
119 | \r | |
120 | FreePool (Fcb);\r | |
121 | }\r | |
122 | \r | |
123 | \r | |
124 | \r | |
125 | EFI_STATUS\r | |
126 | VolumeOpen (\r | |
127 | IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,\r | |
128 | OUT EFI_FILE **Root\r | |
129 | )\r | |
130 | {\r | |
131 | SEMIHOST_FCB *RootFcb = NULL;\r | |
132 | \r | |
133 | if (Root == NULL) {\r | |
134 | return EFI_INVALID_PARAMETER;\r | |
135 | }\r | |
136 | \r | |
137 | RootFcb = AllocateFCB ();\r | |
138 | if (RootFcb == NULL) {\r | |
139 | return EFI_OUT_OF_RESOURCES;\r | |
140 | }\r | |
141 | \r | |
142 | RootFcb->IsRoot = TRUE;\r | |
143 | RootFcb->Info.Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;\r | |
144 | \r | |
145 | InsertTailList (&gFileList, &RootFcb->Link);\r | |
146 | \r | |
147 | *Root = &RootFcb->File;\r | |
148 | \r | |
149 | return EFI_SUCCESS;\r | |
150 | }\r | |
151 | \r | |
152 | EFI_STATUS\r | |
153 | FileOpen (\r | |
154 | IN EFI_FILE *File,\r | |
155 | OUT EFI_FILE **NewHandle,\r | |
156 | IN CHAR16 *FileName,\r | |
157 | IN UINT64 OpenMode,\r | |
158 | IN UINT64 Attributes\r | |
159 | )\r | |
160 | {\r | |
161 | SEMIHOST_FCB *FileFcb = NULL;\r | |
162 | EFI_STATUS Status = EFI_SUCCESS;\r | |
163 | UINTN SemihostHandle;\r | |
164 | CHAR8 *AsciiFileName;\r | |
165 | UINT32 SemihostMode;\r | |
166 | BOOLEAN IsRoot;\r | |
167 | UINTN Length;\r | |
168 | \r | |
169 | if ((FileName == NULL) || (NewHandle == NULL)) {\r | |
170 | return EFI_INVALID_PARAMETER;\r | |
171 | }\r | |
172 | \r | |
173 | // Semihosting does not support directories\r | |
174 | if (Attributes & EFI_FILE_DIRECTORY) {\r | |
175 | return EFI_UNSUPPORTED;\r | |
176 | }\r | |
177 | \r | |
178 | // Semihost interface requires ASCII filenames\r | |
179 | AsciiFileName = AllocatePool ((StrLen (FileName) + 1) * sizeof (CHAR8));\r | |
180 | if (AsciiFileName == NULL) {\r | |
181 | return EFI_OUT_OF_RESOURCES;\r | |
182 | }\r | |
183 | UnicodeStrToAsciiStr (FileName, AsciiFileName);\r | |
184 | \r | |
185 | if ((AsciiStrCmp (AsciiFileName, "\\") == 0) ||\r | |
186 | (AsciiStrCmp (AsciiFileName, "/") == 0) ||\r | |
187 | (AsciiStrCmp (AsciiFileName, "") == 0) ||\r | |
188 | (AsciiStrCmp (AsciiFileName, ".") == 0)) {\r | |
189 | // Opening '/', '\', '.', or the NULL pathname is trying to open the root directory\r | |
190 | IsRoot = TRUE;\r | |
191 | \r | |
192 | // Root directory node doesn't have a name.\r | |
193 | FreePool (AsciiFileName);\r | |
194 | AsciiFileName = NULL;\r | |
195 | } else {\r | |
196 | // Translate EFI_FILE_MODE into Semihosting mode\r | |
197 | if (OpenMode & EFI_FILE_MODE_WRITE) {\r | |
198 | SemihostMode = SEMIHOST_FILE_MODE_WRITE | SEMIHOST_FILE_MODE_BINARY;\r | |
199 | } else if (OpenMode & EFI_FILE_MODE_READ) {\r | |
200 | SemihostMode = SEMIHOST_FILE_MODE_READ | SEMIHOST_FILE_MODE_BINARY;\r | |
201 | } else {\r | |
202 | return EFI_UNSUPPORTED;\r | |
203 | }\r | |
204 | \r | |
205 | // Add the creation flag if necessary\r | |
206 | if (OpenMode & EFI_FILE_MODE_CREATE) {\r | |
207 | SemihostMode |= SEMIHOST_FILE_MODE_CREATE;\r | |
208 | }\r | |
209 | \r | |
210 | // Call the semihosting interface to open the file.\r | |
211 | Status = SemihostFileOpen (AsciiFileName, SemihostMode, &SemihostHandle);\r | |
212 | if (EFI_ERROR(Status)) {\r | |
213 | return Status;\r | |
214 | }\r | |
215 | \r | |
216 | IsRoot = FALSE;\r | |
217 | }\r | |
218 | \r | |
219 | // Allocate a control block and fill it\r | |
220 | FileFcb = AllocateFCB ();\r | |
221 | if (FileFcb == NULL) {\r | |
222 | return EFI_OUT_OF_RESOURCES;\r | |
223 | }\r | |
224 | \r | |
225 | FileFcb->FileName = AsciiFileName;\r | |
226 | FileFcb->SemihostHandle = SemihostHandle;\r | |
227 | FileFcb->Position = 0;\r | |
228 | FileFcb->IsRoot = IsRoot;\r | |
229 | FileFcb->OpenMode = OpenMode;\r | |
230 | \r | |
231 | if (!IsRoot) {\r | |
232 | Status = SemihostFileLength (SemihostHandle, &Length);\r | |
233 | if (EFI_ERROR(Status)) {\r | |
234 | return Status;\r | |
235 | }\r | |
236 | \r | |
237 | FileFcb->Info.FileSize = Length;\r | |
238 | FileFcb->Info.PhysicalSize = Length;\r | |
239 | FileFcb->Info.Attribute = Attributes;\r | |
240 | }\r | |
241 | \r | |
242 | InsertTailList (&gFileList, &FileFcb->Link);\r | |
243 | \r | |
244 | *NewHandle = &FileFcb->File;\r | |
245 | \r | |
246 | return Status;\r | |
247 | }\r | |
248 | \r | |
249 | \r | |
250 | EFI_STATUS\r | |
251 | FileClose (\r | |
252 | IN EFI_FILE *File\r | |
253 | )\r | |
254 | {\r | |
255 | SEMIHOST_FCB *Fcb = NULL;\r | |
256 | EFI_STATUS Status = EFI_SUCCESS;\r | |
257 | \r | |
258 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
259 | \r | |
260 | if (Fcb->IsRoot == TRUE) {\r | |
261 | FreeFCB (Fcb);\r | |
262 | Status = EFI_SUCCESS;\r | |
263 | } else {\r | |
264 | Status = SemihostFileClose (Fcb->SemihostHandle);\r | |
265 | if (!EFI_ERROR(Status)) {\r | |
266 | FreePool (Fcb->FileName);\r | |
267 | FreeFCB (Fcb);\r | |
268 | }\r | |
269 | }\r | |
270 | \r | |
271 | return Status;\r | |
272 | }\r | |
273 | \r | |
274 | EFI_STATUS\r | |
275 | FileDelete (\r | |
276 | IN EFI_FILE *File\r | |
277 | )\r | |
278 | {\r | |
279 | SEMIHOST_FCB *Fcb = NULL;\r | |
280 | EFI_STATUS Status;\r | |
281 | CHAR8 *FileName;\r | |
282 | UINTN NameSize;\r | |
283 | \r | |
284 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
285 | \r | |
286 | if (!Fcb->IsRoot) {\r | |
287 | // Get the filename from the Fcb\r | |
288 | NameSize = AsciiStrLen (Fcb->FileName);\r | |
289 | FileName = AllocatePool (NameSize + 1);\r | |
290 | \r | |
291 | AsciiStrCpy (FileName, Fcb->FileName);\r | |
292 | \r | |
293 | // Close the file if it's open. Disregard return status,\r | |
294 | // since it might give an error if the file isn't open.\r | |
295 | File->Close (File);\r | |
296 | \r | |
297 | // Call the semihost interface to delete the file.\r | |
298 | Status = SemihostFileRemove (FileName);\r | |
299 | if (EFI_ERROR(Status)) {\r | |
300 | Status = EFI_WARN_DELETE_FAILURE;\r | |
301 | }\r | |
302 | } else {\r | |
303 | Status = EFI_WARN_DELETE_FAILURE;\r | |
304 | }\r | |
305 | \r | |
306 | return Status;\r | |
307 | }\r | |
308 | \r | |
309 | EFI_STATUS\r | |
310 | FileRead (\r | |
311 | IN EFI_FILE *File,\r | |
312 | IN OUT UINTN *BufferSize,\r | |
313 | OUT VOID *Buffer\r | |
314 | )\r | |
315 | {\r | |
316 | SEMIHOST_FCB *Fcb = NULL;\r | |
317 | EFI_STATUS Status;\r | |
318 | \r | |
319 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
320 | \r | |
321 | if (Fcb->IsRoot == TRUE) {\r | |
322 | // By design, the Semihosting feature does not allow to list files on the host machine.\r | |
323 | Status = EFI_UNSUPPORTED;\r | |
324 | } else {\r | |
325 | Status = SemihostFileRead (Fcb->SemihostHandle, BufferSize, Buffer);\r | |
326 | if (!EFI_ERROR (Status)) {\r | |
327 | Fcb->Position += *BufferSize;\r | |
328 | }\r | |
329 | }\r | |
330 | \r | |
331 | return Status;\r | |
332 | }\r | |
333 | \r | |
334 | EFI_STATUS\r | |
335 | FileWrite (\r | |
336 | IN EFI_FILE *File,\r | |
337 | IN OUT UINTN *BufferSize,\r | |
338 | IN VOID *Buffer\r | |
339 | )\r | |
340 | {\r | |
341 | SEMIHOST_FCB *Fcb = NULL;\r | |
342 | EFI_STATUS Status;\r | |
343 | UINTN WriteSize = *BufferSize;\r | |
344 | \r | |
345 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
346 | \r | |
347 | // We cannot write a read-only file\r | |
348 | if ((Fcb->Info.Attribute & EFI_FILE_READ_ONLY)\r | |
349 | || !(Fcb->OpenMode & EFI_FILE_MODE_WRITE)) {\r | |
350 | return EFI_ACCESS_DENIED;\r | |
351 | }\r | |
352 | \r | |
353 | Status = SemihostFileWrite (Fcb->SemihostHandle, &WriteSize, Buffer);\r | |
354 | \r | |
355 | if (!EFI_ERROR(Status)) {\r | |
356 | // Semihost write return the number of bytes *NOT* written.\r | |
357 | *BufferSize -= WriteSize;\r | |
358 | Fcb->Position += *BufferSize;\r | |
359 | }\r | |
360 | \r | |
361 | return Status;\r | |
362 | }\r | |
363 | \r | |
364 | EFI_STATUS\r | |
365 | FileGetPosition (\r | |
366 | IN EFI_FILE *File,\r | |
367 | OUT UINT64 *Position\r | |
368 | )\r | |
369 | {\r | |
370 | SEMIHOST_FCB *Fcb = NULL;\r | |
371 | \r | |
372 | if (Position == NULL) {\r | |
373 | return EFI_INVALID_PARAMETER;\r | |
374 | }\r | |
375 | \r | |
376 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
377 | \r | |
378 | *Position = Fcb->Position;\r | |
379 | \r | |
380 | return EFI_SUCCESS;\r | |
381 | }\r | |
382 | \r | |
383 | EFI_STATUS\r | |
384 | FileSetPosition (\r | |
385 | IN EFI_FILE *File,\r | |
386 | IN UINT64 Position\r | |
387 | )\r | |
388 | {\r | |
389 | SEMIHOST_FCB *Fcb = NULL;\r | |
390 | UINTN Length;\r | |
391 | EFI_STATUS Status;\r | |
392 | \r | |
393 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
394 | \r | |
395 | if (!Fcb->IsRoot) {\r | |
396 | Status = SemihostFileLength (Fcb->SemihostHandle, &Length);\r | |
397 | if (!EFI_ERROR(Status) && (Length < Position)) {\r | |
398 | Position = Length;\r | |
399 | }\r | |
400 | \r | |
401 | Status = SemihostFileSeek (Fcb->SemihostHandle, (UINT32)Position);\r | |
402 | if (!EFI_ERROR(Status)) {\r | |
403 | Fcb->Position = Position;\r | |
404 | }\r | |
405 | } else {\r | |
406 | Fcb->Position = Position;\r | |
407 | Status = EFI_SUCCESS;\r | |
408 | }\r | |
409 | \r | |
410 | return Status;\r | |
411 | }\r | |
412 | \r | |
413 | STATIC\r | |
414 | EFI_STATUS\r | |
415 | GetFileInfo (\r | |
416 | IN SEMIHOST_FCB *Fcb,\r | |
417 | IN OUT UINTN *BufferSize,\r | |
418 | OUT VOID *Buffer\r | |
419 | )\r | |
420 | {\r | |
421 | EFI_FILE_INFO *Info = NULL;\r | |
422 | UINTN NameSize = 0;\r | |
423 | UINTN ResultSize;\r | |
424 | UINTN Index;\r | |
425 | \r | |
426 | if (Fcb->IsRoot == TRUE) {\r | |
427 | ResultSize = SIZE_OF_EFI_FILE_INFO + sizeof(CHAR16);\r | |
428 | } else {\r | |
429 | NameSize = AsciiStrLen (Fcb->FileName) + 1;\r | |
430 | ResultSize = SIZE_OF_EFI_FILE_INFO + NameSize * sizeof (CHAR16);\r | |
431 | }\r | |
432 | \r | |
433 | if (*BufferSize < ResultSize) {\r | |
434 | *BufferSize = ResultSize;\r | |
435 | return EFI_BUFFER_TOO_SMALL;\r | |
436 | }\r | |
437 | \r | |
438 | Info = Buffer;\r | |
439 | \r | |
440 | // Copy the current file info\r | |
441 | CopyMem (Info, &Fcb->Info, SIZE_OF_EFI_FILE_INFO);\r | |
442 | \r | |
443 | // Fill in the structure\r | |
444 | Info->Size = ResultSize;\r | |
445 | \r | |
446 | if (Fcb->IsRoot == TRUE) {\r | |
447 | Info->FileName[0] = L'\0';\r | |
448 | } else {\r | |
449 | for (Index = 0; Index < NameSize; Index++) {\r | |
450 | Info->FileName[Index] = Fcb->FileName[Index]; \r | |
451 | }\r | |
452 | }\r | |
453 | \r | |
454 | *BufferSize = ResultSize; \r | |
455 | \r | |
456 | return EFI_SUCCESS;\r | |
457 | }\r | |
458 | \r | |
459 | STATIC\r | |
460 | EFI_STATUS\r | |
461 | GetFilesystemInfo (\r | |
462 | IN SEMIHOST_FCB *Fcb,\r | |
463 | IN OUT UINTN *BufferSize,\r | |
464 | OUT VOID *Buffer\r | |
465 | )\r | |
466 | {\r | |
467 | EFI_FILE_SYSTEM_INFO *Info = NULL;\r | |
468 | EFI_STATUS Status;\r | |
469 | UINTN ResultSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (mSemihostFsLabel);\r | |
470 | \r | |
471 | if (*BufferSize >= ResultSize) {\r | |
472 | ZeroMem (Buffer, ResultSize);\r | |
473 | Status = EFI_SUCCESS;\r | |
474 | \r | |
475 | Info = Buffer;\r | |
476 | \r | |
477 | Info->Size = ResultSize;\r | |
478 | Info->ReadOnly = FALSE;\r | |
479 | Info->VolumeSize = 0;\r | |
480 | Info->FreeSpace = 0;\r | |
481 | Info->BlockSize = 0;\r | |
482 | \r | |
483 | StrCpy (Info->VolumeLabel, mSemihostFsLabel);\r | |
484 | } else {\r | |
485 | Status = EFI_BUFFER_TOO_SMALL;\r | |
486 | }\r | |
487 | \r | |
488 | *BufferSize = ResultSize; \r | |
489 | return Status;\r | |
490 | }\r | |
491 | \r | |
492 | EFI_STATUS\r | |
493 | FileGetInfo (\r | |
494 | IN EFI_FILE *File,\r | |
495 | IN EFI_GUID *InformationType,\r | |
496 | IN OUT UINTN *BufferSize,\r | |
497 | OUT VOID *Buffer\r | |
498 | )\r | |
499 | {\r | |
500 | SEMIHOST_FCB *Fcb;\r | |
501 | EFI_STATUS Status;\r | |
502 | UINTN ResultSize;\r | |
503 | \r | |
504 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
505 | \r | |
506 | if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid) != 0) {\r | |
507 | Status = GetFilesystemInfo (Fcb, BufferSize, Buffer);\r | |
508 | } else if (CompareGuid (InformationType, &gEfiFileInfoGuid) != 0) {\r | |
509 | Status = GetFileInfo (Fcb, BufferSize, Buffer);\r | |
510 | } else if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid) != 0) {\r | |
511 | ResultSize = StrSize (mSemihostFsLabel);\r | |
512 | \r | |
513 | if (*BufferSize >= ResultSize) {\r | |
514 | StrCpy (Buffer, mSemihostFsLabel);\r | |
515 | Status = EFI_SUCCESS;\r | |
516 | } else {\r | |
517 | Status = EFI_BUFFER_TOO_SMALL;\r | |
518 | }\r | |
519 | \r | |
520 | *BufferSize = ResultSize;\r | |
521 | } else {\r | |
522 | Status = EFI_UNSUPPORTED;\r | |
523 | }\r | |
524 | \r | |
525 | return Status;\r | |
526 | }\r | |
527 | \r | |
528 | EFI_STATUS\r | |
529 | FileSetInfo (\r | |
530 | IN EFI_FILE *File,\r | |
531 | IN EFI_GUID *InformationType,\r | |
532 | IN UINTN BufferSize,\r | |
533 | IN VOID *Buffer\r | |
534 | )\r | |
535 | {\r | |
536 | EFI_STATUS Status;\r | |
537 | \r | |
538 | if (Buffer == NULL) {\r | |
539 | return EFI_INVALID_PARAMETER;\r | |
540 | }\r | |
541 | \r | |
542 | Status = EFI_UNSUPPORTED;\r | |
543 | \r | |
544 | if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid) != 0) {\r | |
545 | //Status = SetFilesystemInfo (Fcb, BufferSize, Buffer);\r | |
546 | } else if (CompareGuid (InformationType, &gEfiFileInfoGuid) != 0) {\r | |
547 | // Semihosting does not give us access to setting file info, but\r | |
548 | // if we fail here we cannot create new files.\r | |
549 | Status = EFI_SUCCESS;\r | |
550 | } else if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid) != 0) {\r | |
551 | if (StrSize (Buffer) > 0) {\r | |
552 | FreePool (mSemihostFsLabel);\r | |
553 | mSemihostFsLabel = AllocateCopyPool (StrSize (Buffer), Buffer);\r | |
554 | Status = EFI_SUCCESS;\r | |
555 | }\r | |
556 | }\r | |
557 | \r | |
558 | return Status;\r | |
559 | }\r | |
560 | \r | |
561 | EFI_STATUS\r | |
562 | FileFlush (\r | |
563 | IN EFI_FILE *File\r | |
564 | )\r | |
565 | {\r | |
566 | SEMIHOST_FCB *Fcb;\r | |
567 | \r | |
568 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
569 | \r | |
570 | if (Fcb->IsRoot) {\r | |
571 | return EFI_SUCCESS;\r | |
572 | } else {\r | |
573 | if ((Fcb->Info.Attribute & EFI_FILE_READ_ONLY)\r | |
574 | || !(Fcb->OpenMode & EFI_FILE_MODE_WRITE)) {\r | |
575 | return EFI_ACCESS_DENIED;\r | |
576 | } else {\r | |
577 | return EFI_SUCCESS;\r | |
578 | }\r | |
579 | }\r | |
580 | }\r | |
581 | \r | |
582 | EFI_STATUS\r | |
583 | SemihostFsEntryPoint (\r | |
584 | IN EFI_HANDLE ImageHandle,\r | |
585 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
586 | )\r | |
587 | {\r | |
588 | EFI_STATUS Status;\r | |
589 | \r | |
590 | Status = EFI_NOT_FOUND;\r | |
591 | \r | |
592 | if (SemihostConnectionSupported ()) {\r | |
593 | mSemihostFsLabel = AllocateCopyPool (StrSize (DEFAULT_SEMIHOST_FS_LABEL), DEFAULT_SEMIHOST_FS_LABEL);\r | |
594 | if (mSemihostFsLabel == NULL) {\r | |
595 | return EFI_OUT_OF_RESOURCES;\r | |
596 | }\r | |
597 | \r | |
598 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
599 | &gInstallHandle, \r | |
600 | &gEfiSimpleFileSystemProtocolGuid, &gSemihostFs, \r | |
601 | &gEfiDevicePathProtocolGuid, &gDevicePath,\r | |
602 | NULL\r | |
603 | );\r | |
604 | \r | |
605 | if (EFI_ERROR(Status)) {\r | |
606 | FreePool (mSemihostFsLabel);\r | |
607 | }\r | |
608 | }\r | |
609 | \r | |
610 | return Status;\r | |
611 | }\r |