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2ef2b01e A |
1 | /** @file\r |
2 | Support a Semi Host file system over a debuggers JTAG\r | |
3 | \r | |
d6ebcab7 | 4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r |
d276ac10 | 5 | Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>\r |
c63626b7 | 6 | \r |
d6ebcab7 | 7 | This program and the accompanying materials\r |
2ef2b01e A |
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 | |
09f2cf82 | 21 | #include <Guid/FileSystemVolumeLabelInfo.h>\r |
2ef2b01e A |
22 | \r |
23 | #include <Library/BaseLib.h>\r | |
3402aac7 | 24 | #include <Library/BaseMemoryLib.h>\r |
2ef2b01e A |
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 | |
09f2cf82 | 36 | #define DEFAULT_SEMIHOST_FS_LABEL L"SemihostFs"\r |
37 | \r | |
38 | STATIC CHAR16 *mSemihostFsLabel;\r | |
2ef2b01e A |
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 | |
fdd12bd5 | 60 | // Device path for semi-hosting. It contains our autogened Caller ID GUID.\r |
2ef2b01e A |
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 | |
b0fdce95 | 69 | { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, { sizeof (VENDOR_DEVICE_PATH), 0 } },\r |
2ef2b01e A |
70 | EFI_CALLER_ID_GUID\r |
71 | },\r | |
b0fdce95 | 72 | { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 } }\r |
2ef2b01e A |
73 | };\r |
74 | \r | |
75 | typedef struct {\r | |
09f2cf82 | 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 | |
2ef2b01e A |
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 | |
3402aac7 | 132 | \r |
2ef2b01e A |
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 | |
3402aac7 | 141 | \r |
2ef2b01e | 142 | RootFcb->IsRoot = TRUE;\r |
09f2cf82 | 143 | RootFcb->Info.Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;\r |
2ef2b01e A |
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 | |
fdd12bd5 RC |
152 | /**\r |
153 | Open a file on the host system by means of the semihosting interface.\r | |
154 | \r | |
155 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is\r | |
156 | the file handle to source location.\r | |
157 | @param[out] NewHandle A pointer to the location to return the opened\r | |
158 | handle for the new file.\r | |
159 | @param[in] FileName The Null-terminated string of the name of the file\r | |
160 | to be opened.\r | |
161 | @param[in] OpenMode The mode to open the file : Read or Read/Write or\r | |
162 | Read/Write/Create\r | |
163 | @param[in] Attributes Only valid for EFI_FILE_MODE_CREATE, in which case these\r | |
164 | are the attribute bits for the newly created file. The\r | |
165 | mnemonics of the attribute bits are : EFI_FILE_READ_ONLY,\r | |
166 | EFI_FILE_HIDDEN, EFI_FILE_SYSTEM, EFI_FILE_RESERVED,\r | |
167 | EFI_FILE_DIRECTORY and EFI_FILE_ARCHIVE.\r | |
168 | \r | |
169 | @retval EFI_SUCCESS The file was open.\r | |
170 | @retval EFI_NOT_FOUND The specified file could not be found.\r | |
171 | @retval EFI_DEVICE_ERROR The last issued semi-hosting operation failed.\r | |
172 | @retval EFI_WRITE_PROTECTED Attempt to create a directory. This is not possible\r | |
173 | with the semi-hosting interface.\r | |
174 | @retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the file.\r | |
175 | @retval EFI_INVALID_PARAMETER At least one of the parameters is invalid.\r | |
176 | \r | |
177 | **/\r | |
2ef2b01e A |
178 | EFI_STATUS\r |
179 | FileOpen (\r | |
fdd12bd5 RC |
180 | IN EFI_FILE *This,\r |
181 | OUT EFI_FILE **NewHandle,\r | |
182 | IN CHAR16 *FileName,\r | |
183 | IN UINT64 OpenMode,\r | |
184 | IN UINT64 Attributes\r | |
2ef2b01e A |
185 | )\r |
186 | {\r | |
fdd12bd5 RC |
187 | SEMIHOST_FCB *FileFcb;\r |
188 | RETURN_STATUS Return;\r | |
189 | EFI_STATUS Status;\r | |
190 | UINTN SemihostHandle;\r | |
191 | CHAR8 *AsciiFileName;\r | |
192 | UINT32 SemihostMode;\r | |
193 | UINTN Length;\r | |
2ef2b01e A |
194 | \r |
195 | if ((FileName == NULL) || (NewHandle == NULL)) {\r | |
196 | return EFI_INVALID_PARAMETER;\r | |
197 | }\r | |
198 | \r | |
fdd12bd5 RC |
199 | if ( (OpenMode != EFI_FILE_MODE_READ) &&\r |
200 | (OpenMode != (EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE)) &&\r | |
201 | (OpenMode != (EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE)) ) {\r | |
202 | return EFI_INVALID_PARAMETER;\r | |
203 | }\r | |
204 | \r | |
205 | if ((OpenMode & EFI_FILE_MODE_CREATE) &&\r | |
206 | (Attributes & EFI_FILE_DIRECTORY) ) {\r | |
207 | return EFI_WRITE_PROTECTED;\r | |
09f2cf82 | 208 | }\r |
209 | \r | |
fdd12bd5 | 210 | AsciiFileName = AllocatePool (StrLen (FileName) + 1);\r |
2ef2b01e A |
211 | if (AsciiFileName == NULL) {\r |
212 | return EFI_OUT_OF_RESOURCES;\r | |
213 | }\r | |
ed2405a0 | 214 | UnicodeStrToAsciiStr (FileName, AsciiFileName);\r |
2ef2b01e | 215 | \r |
fdd12bd5 | 216 | // Opening '/', '\', '.', or the NULL pathname is trying to open the root directory\r |
1ea31716 | 217 | if ((AsciiStrCmp (AsciiFileName, "\\") == 0) ||\r |
218 | (AsciiStrCmp (AsciiFileName, "/") == 0) ||\r | |
219 | (AsciiStrCmp (AsciiFileName, "") == 0) ||\r | |
fdd12bd5 | 220 | (AsciiStrCmp (AsciiFileName, ".") == 0) ) {\r |
2ef2b01e | 221 | FreePool (AsciiFileName);\r |
fdd12bd5 RC |
222 | return (VolumeOpen (&gSemihostFs, NewHandle));\r |
223 | }\r | |
224 | \r | |
225 | //\r | |
226 | // No control is done here concerning the file path. It is passed\r | |
227 | // as it is to the host operating system through the semi-hosting\r | |
228 | // interface. We first try to open the file in the read or update\r | |
229 | // mode even if the file creation has been asked for. That way, if\r | |
230 | // the file already exists, it is not truncated to zero length. In\r | |
231 | // write mode (bit SEMIHOST_FILE_MODE_WRITE up), if the file already\r | |
232 | // exists, it is reset to an empty file.\r | |
233 | //\r | |
234 | if (OpenMode == EFI_FILE_MODE_READ) {\r | |
235 | SemihostMode = SEMIHOST_FILE_MODE_READ | SEMIHOST_FILE_MODE_BINARY;\r | |
2ef2b01e | 236 | } else {\r |
fdd12bd5 RC |
237 | SemihostMode = SEMIHOST_FILE_MODE_READ | SEMIHOST_FILE_MODE_BINARY | SEMIHOST_FILE_MODE_UPDATE;\r |
238 | }\r | |
239 | Return = SemihostFileOpen (AsciiFileName, SemihostMode, &SemihostHandle);\r | |
2ef2b01e | 240 | \r |
fdd12bd5 | 241 | if (RETURN_ERROR (Return)) {\r |
2ef2b01e | 242 | if (OpenMode & EFI_FILE_MODE_CREATE) {\r |
fdd12bd5 RC |
243 | //\r |
244 | // In the create if does not exist case, if the opening in update\r | |
245 | // mode failed, create it and open it in update mode. The update\r | |
246 | // mode allows for both read and write from and to the file.\r | |
247 | //\r | |
248 | Return = SemihostFileOpen (\r | |
249 | AsciiFileName,\r | |
250 | SEMIHOST_FILE_MODE_WRITE | SEMIHOST_FILE_MODE_BINARY | SEMIHOST_FILE_MODE_UPDATE,\r | |
251 | &SemihostHandle\r | |
252 | );\r | |
253 | if (RETURN_ERROR (Return)) {\r | |
254 | Status = EFI_DEVICE_ERROR;\r | |
255 | goto Error;\r | |
256 | }\r | |
257 | } else {\r | |
258 | Status = EFI_NOT_FOUND;\r | |
259 | goto Error;\r | |
2ef2b01e | 260 | }\r |
2ef2b01e A |
261 | }\r |
262 | \r | |
263 | // Allocate a control block and fill it\r | |
264 | FileFcb = AllocateFCB ();\r | |
265 | if (FileFcb == NULL) {\r | |
fdd12bd5 RC |
266 | Status = EFI_OUT_OF_RESOURCES;\r |
267 | goto Error;\r | |
2ef2b01e A |
268 | }\r |
269 | \r | |
270 | FileFcb->FileName = AsciiFileName;\r | |
271 | FileFcb->SemihostHandle = SemihostHandle;\r | |
272 | FileFcb->Position = 0;\r | |
fdd12bd5 | 273 | FileFcb->IsRoot = 0;\r |
09f2cf82 | 274 | FileFcb->OpenMode = OpenMode;\r |
275 | \r | |
fdd12bd5 RC |
276 | Return = SemihostFileLength (SemihostHandle, &Length);\r |
277 | if (RETURN_ERROR (Return)) {\r | |
278 | Status = EFI_DEVICE_ERROR;\r | |
279 | FreeFCB (FileFcb);\r | |
280 | goto Error;\r | |
09f2cf82 | 281 | }\r |
2ef2b01e | 282 | \r |
fdd12bd5 RC |
283 | FileFcb->Info.FileSize = Length;\r |
284 | FileFcb->Info.PhysicalSize = Length;\r | |
285 | FileFcb->Info.Attribute = (OpenMode & EFI_FILE_MODE_CREATE) ? Attributes : 0;\r | |
286 | \r | |
2ef2b01e A |
287 | InsertTailList (&gFileList, &FileFcb->Link);\r |
288 | \r | |
289 | *NewHandle = &FileFcb->File;\r | |
290 | \r | |
fdd12bd5 RC |
291 | return EFI_SUCCESS;\r |
292 | \r | |
293 | Error:\r | |
294 | \r | |
295 | FreePool (AsciiFileName);\r | |
296 | \r | |
2ef2b01e A |
297 | return Status;\r |
298 | }\r | |
299 | \r | |
300 | \r | |
301 | EFI_STATUS\r | |
302 | FileClose (\r | |
303 | IN EFI_FILE *File\r | |
304 | )\r | |
305 | {\r | |
306 | SEMIHOST_FCB *Fcb = NULL;\r | |
307 | EFI_STATUS Status = EFI_SUCCESS;\r | |
308 | \r | |
309 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
310 | \r | |
311 | if (Fcb->IsRoot == TRUE) {\r | |
312 | FreeFCB (Fcb);\r | |
313 | Status = EFI_SUCCESS;\r | |
314 | } else {\r | |
315 | Status = SemihostFileClose (Fcb->SemihostHandle);\r | |
316 | if (!EFI_ERROR(Status)) {\r | |
317 | FreePool (Fcb->FileName);\r | |
318 | FreeFCB (Fcb);\r | |
319 | }\r | |
320 | }\r | |
3402aac7 | 321 | \r |
2ef2b01e A |
322 | return Status;\r |
323 | }\r | |
324 | \r | |
325 | EFI_STATUS\r | |
326 | FileDelete (\r | |
327 | IN EFI_FILE *File\r | |
328 | )\r | |
329 | {\r | |
330 | SEMIHOST_FCB *Fcb = NULL;\r | |
331 | EFI_STATUS Status;\r | |
332 | CHAR8 *FileName;\r | |
333 | UINTN NameSize;\r | |
334 | \r | |
335 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
336 | \r | |
3bb46df2 | 337 | if (!Fcb->IsRoot) {\r |
338 | // Get the filename from the Fcb\r | |
339 | NameSize = AsciiStrLen (Fcb->FileName);\r | |
340 | FileName = AllocatePool (NameSize + 1);\r | |
2ef2b01e | 341 | \r |
3bb46df2 | 342 | AsciiStrCpy (FileName, Fcb->FileName);\r |
2ef2b01e | 343 | \r |
3bb46df2 | 344 | // Close the file if it's open. Disregard return status,\r |
345 | // since it might give an error if the file isn't open.\r | |
346 | File->Close (File);\r | |
347 | \r | |
348 | // Call the semihost interface to delete the file.\r | |
349 | Status = SemihostFileRemove (FileName);\r | |
09f2cf82 | 350 | if (EFI_ERROR(Status)) {\r |
351 | Status = EFI_WARN_DELETE_FAILURE;\r | |
352 | }\r | |
3bb46df2 | 353 | } else {\r |
09f2cf82 | 354 | Status = EFI_WARN_DELETE_FAILURE;\r |
3bb46df2 | 355 | }\r |
2ef2b01e A |
356 | \r |
357 | return Status;\r | |
358 | }\r | |
359 | \r | |
360 | EFI_STATUS\r | |
361 | FileRead (\r | |
362 | IN EFI_FILE *File,\r | |
363 | IN OUT UINTN *BufferSize,\r | |
364 | OUT VOID *Buffer\r | |
365 | )\r | |
366 | {\r | |
367 | SEMIHOST_FCB *Fcb = NULL;\r | |
368 | EFI_STATUS Status;\r | |
369 | \r | |
370 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
371 | \r | |
372 | if (Fcb->IsRoot == TRUE) {\r | |
b1cab81f | 373 | // By design, the Semihosting feature does not allow to list files on the host machine.\r |
2ef2b01e A |
374 | Status = EFI_UNSUPPORTED;\r |
375 | } else {\r | |
376 | Status = SemihostFileRead (Fcb->SemihostHandle, BufferSize, Buffer);\r | |
377 | if (!EFI_ERROR (Status)) {\r | |
378 | Fcb->Position += *BufferSize;\r | |
379 | }\r | |
380 | }\r | |
381 | \r | |
382 | return Status;\r | |
383 | }\r | |
384 | \r | |
385 | EFI_STATUS\r | |
386 | FileWrite (\r | |
387 | IN EFI_FILE *File,\r | |
388 | IN OUT UINTN *BufferSize,\r | |
389 | IN VOID *Buffer\r | |
390 | )\r | |
391 | {\r | |
392 | SEMIHOST_FCB *Fcb = NULL;\r | |
393 | EFI_STATUS Status;\r | |
394 | UINTN WriteSize = *BufferSize;\r | |
395 | \r | |
396 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
397 | \r | |
09f2cf82 | 398 | // We cannot write a read-only file\r |
cc271ec3 OM |
399 | if ((Fcb->Info.Attribute & EFI_FILE_READ_ONLY)\r |
400 | || !(Fcb->OpenMode & EFI_FILE_MODE_WRITE)) {\r | |
09f2cf82 | 401 | return EFI_ACCESS_DENIED;\r |
402 | }\r | |
403 | \r | |
2ef2b01e A |
404 | Status = SemihostFileWrite (Fcb->SemihostHandle, &WriteSize, Buffer);\r |
405 | \r | |
406 | if (!EFI_ERROR(Status)) {\r | |
407 | // Semihost write return the number of bytes *NOT* written.\r | |
408 | *BufferSize -= WriteSize;\r | |
409 | Fcb->Position += *BufferSize;\r | |
410 | }\r | |
3402aac7 | 411 | \r |
2ef2b01e A |
412 | return Status;\r |
413 | }\r | |
414 | \r | |
415 | EFI_STATUS\r | |
416 | FileGetPosition (\r | |
417 | IN EFI_FILE *File,\r | |
418 | OUT UINT64 *Position\r | |
419 | )\r | |
420 | {\r | |
421 | SEMIHOST_FCB *Fcb = NULL;\r | |
3402aac7 | 422 | \r |
2ef2b01e A |
423 | if (Position == NULL) {\r |
424 | return EFI_INVALID_PARAMETER;\r | |
425 | }\r | |
426 | \r | |
427 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
428 | \r | |
429 | *Position = Fcb->Position;\r | |
430 | \r | |
431 | return EFI_SUCCESS;\r | |
432 | }\r | |
433 | \r | |
434 | EFI_STATUS\r | |
435 | FileSetPosition (\r | |
436 | IN EFI_FILE *File,\r | |
437 | IN UINT64 Position\r | |
438 | )\r | |
439 | {\r | |
440 | SEMIHOST_FCB *Fcb = NULL;\r | |
c63626b7 | 441 | UINTN Length;\r |
2ef2b01e A |
442 | EFI_STATUS Status;\r |
443 | \r | |
444 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
445 | \r | |
3bb46df2 | 446 | if (!Fcb->IsRoot) {\r |
447 | Status = SemihostFileLength (Fcb->SemihostHandle, &Length);\r | |
448 | if (!EFI_ERROR(Status) && (Length < Position)) {\r | |
449 | Position = Length;\r | |
450 | }\r | |
2ef2b01e | 451 | \r |
3bb46df2 | 452 | Status = SemihostFileSeek (Fcb->SemihostHandle, (UINT32)Position);\r |
453 | if (!EFI_ERROR(Status)) {\r | |
454 | Fcb->Position = Position;\r | |
455 | }\r | |
456 | } else {\r | |
2ef2b01e | 457 | Fcb->Position = Position;\r |
3bb46df2 | 458 | Status = EFI_SUCCESS;\r |
2ef2b01e A |
459 | }\r |
460 | \r | |
461 | return Status;\r | |
462 | }\r | |
463 | \r | |
464 | STATIC\r | |
465 | EFI_STATUS\r | |
466 | GetFileInfo (\r | |
467 | IN SEMIHOST_FCB *Fcb,\r | |
468 | IN OUT UINTN *BufferSize,\r | |
469 | OUT VOID *Buffer\r | |
470 | )\r | |
471 | {\r | |
472 | EFI_FILE_INFO *Info = NULL;\r | |
473 | UINTN NameSize = 0;\r | |
474 | UINTN ResultSize;\r | |
475 | UINTN Index;\r | |
2ef2b01e A |
476 | \r |
477 | if (Fcb->IsRoot == TRUE) {\r | |
478 | ResultSize = SIZE_OF_EFI_FILE_INFO + sizeof(CHAR16);\r | |
479 | } else {\r | |
480 | NameSize = AsciiStrLen (Fcb->FileName) + 1;\r | |
481 | ResultSize = SIZE_OF_EFI_FILE_INFO + NameSize * sizeof (CHAR16);\r | |
482 | }\r | |
483 | \r | |
484 | if (*BufferSize < ResultSize) {\r | |
485 | *BufferSize = ResultSize;\r | |
486 | return EFI_BUFFER_TOO_SMALL;\r | |
487 | }\r | |
488 | \r | |
489 | Info = Buffer;\r | |
490 | \r | |
09f2cf82 | 491 | // Copy the current file info\r |
492 | CopyMem (Info, &Fcb->Info, SIZE_OF_EFI_FILE_INFO);\r | |
2ef2b01e A |
493 | \r |
494 | // Fill in the structure\r | |
495 | Info->Size = ResultSize;\r | |
496 | \r | |
497 | if (Fcb->IsRoot == TRUE) {\r | |
2ef2b01e A |
498 | Info->FileName[0] = L'\0';\r |
499 | } else {\r | |
2ef2b01e | 500 | for (Index = 0; Index < NameSize; Index++) {\r |
3402aac7 | 501 | Info->FileName[Index] = Fcb->FileName[Index];\r |
2ef2b01e A |
502 | }\r |
503 | }\r | |
504 | \r | |
3402aac7 | 505 | *BufferSize = ResultSize;\r |
2ef2b01e A |
506 | \r |
507 | return EFI_SUCCESS;\r | |
508 | }\r | |
509 | \r | |
510 | STATIC\r | |
511 | EFI_STATUS\r | |
512 | GetFilesystemInfo (\r | |
513 | IN SEMIHOST_FCB *Fcb,\r | |
514 | IN OUT UINTN *BufferSize,\r | |
515 | OUT VOID *Buffer\r | |
516 | )\r | |
517 | {\r | |
518 | EFI_FILE_SYSTEM_INFO *Info = NULL;\r | |
519 | EFI_STATUS Status;\r | |
09f2cf82 | 520 | UINTN ResultSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (mSemihostFsLabel);\r |
3402aac7 | 521 | \r |
09f2cf82 | 522 | if (*BufferSize >= ResultSize) {\r |
2ef2b01e A |
523 | ZeroMem (Buffer, ResultSize);\r |
524 | Status = EFI_SUCCESS;\r | |
3402aac7 | 525 | \r |
2ef2b01e A |
526 | Info = Buffer;\r |
527 | \r | |
528 | Info->Size = ResultSize;\r | |
529 | Info->ReadOnly = FALSE;\r | |
530 | Info->VolumeSize = 0;\r | |
531 | Info->FreeSpace = 0;\r | |
532 | Info->BlockSize = 0;\r | |
533 | \r | |
09f2cf82 | 534 | StrCpy (Info->VolumeLabel, mSemihostFsLabel);\r |
2ef2b01e A |
535 | } else {\r |
536 | Status = EFI_BUFFER_TOO_SMALL;\r | |
537 | }\r | |
538 | \r | |
3402aac7 | 539 | *BufferSize = ResultSize;\r |
2ef2b01e A |
540 | return Status;\r |
541 | }\r | |
542 | \r | |
543 | EFI_STATUS\r | |
544 | FileGetInfo (\r | |
545 | IN EFI_FILE *File,\r | |
546 | IN EFI_GUID *InformationType,\r | |
547 | IN OUT UINTN *BufferSize,\r | |
548 | OUT VOID *Buffer\r | |
549 | )\r | |
550 | {\r | |
09f2cf82 | 551 | SEMIHOST_FCB *Fcb;\r |
552 | EFI_STATUS Status;\r | |
553 | UINTN ResultSize;\r | |
3402aac7 | 554 | \r |
2ef2b01e | 555 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r |
3402aac7 | 556 | \r |
09f2cf82 | 557 | if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid) != 0) {\r |
558 | Status = GetFilesystemInfo (Fcb, BufferSize, Buffer);\r | |
559 | } else if (CompareGuid (InformationType, &gEfiFileInfoGuid) != 0) {\r | |
560 | Status = GetFileInfo (Fcb, BufferSize, Buffer);\r | |
561 | } else if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid) != 0) {\r | |
562 | ResultSize = StrSize (mSemihostFsLabel);\r | |
563 | \r | |
564 | if (*BufferSize >= ResultSize) {\r | |
565 | StrCpy (Buffer, mSemihostFsLabel);\r | |
566 | Status = EFI_SUCCESS;\r | |
567 | } else {\r | |
568 | Status = EFI_BUFFER_TOO_SMALL;\r | |
569 | }\r | |
570 | \r | |
571 | *BufferSize = ResultSize;\r | |
572 | } else {\r | |
573 | Status = EFI_UNSUPPORTED;\r | |
2ef2b01e | 574 | }\r |
09f2cf82 | 575 | \r |
2ef2b01e A |
576 | return Status;\r |
577 | }\r | |
578 | \r | |
579 | EFI_STATUS\r | |
580 | FileSetInfo (\r | |
581 | IN EFI_FILE *File,\r | |
582 | IN EFI_GUID *InformationType,\r | |
583 | IN UINTN BufferSize,\r | |
584 | IN VOID *Buffer\r | |
585 | )\r | |
586 | {\r | |
09f2cf82 | 587 | EFI_STATUS Status;\r |
588 | \r | |
589 | if (Buffer == NULL) {\r | |
590 | return EFI_INVALID_PARAMETER;\r | |
591 | }\r | |
592 | \r | |
593 | Status = EFI_UNSUPPORTED;\r | |
594 | \r | |
595 | if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid) != 0) {\r | |
596 | //Status = SetFilesystemInfo (Fcb, BufferSize, Buffer);\r | |
597 | } else if (CompareGuid (InformationType, &gEfiFileInfoGuid) != 0) {\r | |
d276ac10 HL |
598 | // Semihosting does not give us access to setting file info, but\r |
599 | // if we fail here we cannot create new files.\r | |
600 | Status = EFI_SUCCESS;\r | |
09f2cf82 | 601 | } else if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid) != 0) {\r |
602 | if (StrSize (Buffer) > 0) {\r | |
603 | FreePool (mSemihostFsLabel);\r | |
604 | mSemihostFsLabel = AllocateCopyPool (StrSize (Buffer), Buffer);\r | |
605 | Status = EFI_SUCCESS;\r | |
606 | }\r | |
607 | }\r | |
608 | \r | |
609 | return Status;\r | |
2ef2b01e A |
610 | }\r |
611 | \r | |
612 | EFI_STATUS\r | |
613 | FileFlush (\r | |
614 | IN EFI_FILE *File\r | |
615 | )\r | |
616 | {\r | |
09f2cf82 | 617 | SEMIHOST_FCB *Fcb;\r |
618 | \r | |
619 | Fcb = SEMIHOST_FCB_FROM_THIS(File);\r | |
620 | \r | |
621 | if (Fcb->IsRoot) {\r | |
622 | return EFI_SUCCESS;\r | |
623 | } else {\r | |
cc271ec3 OM |
624 | if ((Fcb->Info.Attribute & EFI_FILE_READ_ONLY)\r |
625 | || !(Fcb->OpenMode & EFI_FILE_MODE_WRITE)) {\r | |
09f2cf82 | 626 | return EFI_ACCESS_DENIED;\r |
627 | } else {\r | |
628 | return EFI_SUCCESS;\r | |
629 | }\r | |
630 | }\r | |
2ef2b01e A |
631 | }\r |
632 | \r | |
633 | EFI_STATUS\r | |
634 | SemihostFsEntryPoint (\r | |
635 | IN EFI_HANDLE ImageHandle,\r | |
636 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
637 | )\r | |
638 | {\r | |
09f2cf82 | 639 | EFI_STATUS Status;\r |
640 | \r | |
641 | Status = EFI_NOT_FOUND;\r | |
2ef2b01e A |
642 | \r |
643 | if (SemihostConnectionSupported ()) {\r | |
09f2cf82 | 644 | mSemihostFsLabel = AllocateCopyPool (StrSize (DEFAULT_SEMIHOST_FS_LABEL), DEFAULT_SEMIHOST_FS_LABEL);\r |
645 | if (mSemihostFsLabel == NULL) {\r | |
646 | return EFI_OUT_OF_RESOURCES;\r | |
647 | }\r | |
648 | \r | |
2ef2b01e | 649 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
3402aac7 RC |
650 | &gInstallHandle,\r |
651 | &gEfiSimpleFileSystemProtocolGuid, &gSemihostFs,\r | |
2ef2b01e A |
652 | &gEfiDevicePathProtocolGuid, &gDevicePath,\r |
653 | NULL\r | |
654 | );\r | |
09f2cf82 | 655 | \r |
656 | if (EFI_ERROR(Status)) {\r | |
657 | FreePool (mSemihostFsLabel);\r | |
658 | }\r | |
2ef2b01e | 659 | }\r |
3402aac7 | 660 | \r |
2ef2b01e A |
661 | return Status;\r |
662 | }\r |