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1 | /** @file\r |
2 | Try to load an EFI-stubbed ARM Linux kernel from QEMU's fw_cfg.\r | |
3 | \r | |
4 | This implementation differs from OvmfPkg/Library/LoadLinuxLib. An EFI\r | |
5 | stub in the subject kernel is a hard requirement here.\r | |
6 | \r | |
7 | Copyright (C) 2014-2016, Red Hat, Inc.\r | |
8 | \r | |
9 | This program and the accompanying materials are licensed and made available\r | |
10 | under the terms and conditions of the BSD License which accompanies this\r | |
11 | distribution. The full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
15 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | **/\r | |
17 | \r | |
18 | #include <Guid/FileInfo.h>\r | |
19 | #include <Guid/FileSystemInfo.h>\r | |
20 | #include <Guid/FileSystemVolumeLabelInfo.h>\r | |
21 | #include <Library/PrintLib.h>\r | |
22 | #include <Library/QemuFwCfgLib.h>\r | |
23 | #include <Protocol/DevicePath.h>\r | |
24 | #include <Protocol/LoadedImage.h>\r | |
25 | #include <Protocol/SimpleFileSystem.h>\r | |
26 | \r | |
27 | #include "PlatformBm.h"\r | |
28 | \r | |
29 | //\r | |
30 | // Static data that hosts the fw_cfg blobs and serves file requests.\r | |
31 | //\r | |
32 | typedef enum {\r | |
33 | KernelBlobTypeKernel,\r | |
34 | KernelBlobTypeInitrd,\r | |
35 | KernelBlobTypeCommandLine,\r | |
36 | KernelBlobTypeMax\r | |
37 | } KERNEL_BLOB_TYPE;\r | |
38 | \r | |
39 | typedef struct {\r | |
40 | FIRMWARE_CONFIG_ITEM CONST SizeKey;\r | |
41 | FIRMWARE_CONFIG_ITEM CONST DataKey;\r | |
42 | CONST CHAR16 * CONST Name;\r | |
43 | UINT32 Size;\r | |
44 | UINT8 *Data;\r | |
45 | } KERNEL_BLOB;\r | |
46 | \r | |
47 | STATIC KERNEL_BLOB mKernelBlob[KernelBlobTypeMax] = {\r | |
48 | { QemuFwCfgItemKernelSize, QemuFwCfgItemKernelData, L"kernel" },\r | |
49 | { QemuFwCfgItemInitrdSize, QemuFwCfgItemInitrdData, L"initrd" },\r | |
50 | { QemuFwCfgItemCommandLineSize, QemuFwCfgItemCommandLineData, L"cmdline" }\r | |
51 | };\r | |
52 | \r | |
53 | STATIC UINT64 mTotalBlobBytes;\r | |
54 | \r | |
55 | //\r | |
56 | // Device path for the handle that incorporates our "EFI stub filesystem". The\r | |
57 | // GUID is arbitrary and need not be standardized or advertized.\r | |
58 | //\r | |
59 | #pragma pack(1)\r | |
60 | typedef struct {\r | |
61 | VENDOR_DEVICE_PATH VenHwNode;\r | |
62 | EFI_DEVICE_PATH_PROTOCOL EndNode;\r | |
63 | } SINGLE_VENHW_NODE_DEVPATH;\r | |
64 | #pragma pack()\r | |
65 | \r | |
66 | STATIC CONST SINGLE_VENHW_NODE_DEVPATH mFileSystemDevicePath = {\r | |
67 | {\r | |
68 | { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, { sizeof (VENDOR_DEVICE_PATH) } },\r | |
69 | {\r | |
70 | 0xb0fae7e7, 0x6b07, 0x49d0,\r | |
71 | { 0x9e, 0x5b, 0x3b, 0xde, 0xc8, 0x3b, 0x03, 0x9d }\r | |
72 | }\r | |
73 | },\r | |
74 | \r | |
75 | {\r | |
76 | END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE,\r | |
77 | { sizeof (EFI_DEVICE_PATH_PROTOCOL) }\r | |
78 | }\r | |
79 | };\r | |
80 | \r | |
81 | //\r | |
82 | // The "file in the EFI stub filesystem" abstraction.\r | |
83 | //\r | |
84 | STATIC EFI_TIME mInitTime;\r | |
85 | \r | |
86 | #define STUB_FILE_SIG SIGNATURE_64 ('S', 'T', 'U', 'B', 'F', 'I', 'L', 'E')\r | |
87 | \r | |
88 | typedef struct {\r | |
89 | UINT64 Signature; // Carries STUB_FILE_SIG.\r | |
90 | \r | |
91 | KERNEL_BLOB_TYPE BlobType; // Index into mKernelBlob. KernelBlobTypeMax\r | |
92 | // denotes the root directory of the filesystem.\r | |
93 | \r | |
94 | UINT64 Position; // Byte position for regular files;\r | |
95 | // next directory entry to return for the root\r | |
96 | // directory.\r | |
97 | \r | |
98 | EFI_FILE_PROTOCOL File; // Standard protocol interface.\r | |
99 | } STUB_FILE;\r | |
100 | \r | |
101 | #define STUB_FILE_FROM_FILE(FilePointer) \\r | |
102 | CR (FilePointer, STUB_FILE, File, STUB_FILE_SIG)\r | |
103 | \r | |
104 | //\r | |
105 | // Tentative definition of the file protocol template. The initializer\r | |
106 | // (external definition) will be provided later.\r | |
107 | //\r | |
108 | STATIC CONST EFI_FILE_PROTOCOL mEfiFileProtocolTemplate;\r | |
109 | \r | |
110 | \r | |
111 | //\r | |
112 | // Protocol member functions for File.\r | |
113 | //\r | |
114 | \r | |
115 | /**\r | |
116 | Opens a new file relative to the source file's location.\r | |
117 | \r | |
118 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is\r | |
119 | the file handle to the source location. This would\r | |
120 | typically be an open handle to a directory.\r | |
121 | \r | |
122 | @param[out] NewHandle A pointer to the location to return the opened handle\r | |
123 | for the new file.\r | |
124 | \r | |
125 | @param[in] FileName The Null-terminated string of the name of the file to\r | |
126 | be opened. The file name may contain the following\r | |
127 | path modifiers: "\", ".", and "..".\r | |
128 | \r | |
129 | @param[in] OpenMode The mode to open the file. The only valid\r | |
130 | combinations that the file may be opened with are:\r | |
131 | Read, Read/Write, or Create/Read/Write.\r | |
132 | \r | |
133 | @param[in] Attributes Only valid for EFI_FILE_MODE_CREATE, in which case\r | |
134 | these are the attribute bits for the newly created\r | |
135 | file.\r | |
136 | \r | |
137 | @retval EFI_SUCCESS The file was opened.\r | |
138 | @retval EFI_NOT_FOUND The specified file could not be found on the\r | |
139 | device.\r | |
140 | @retval EFI_NO_MEDIA The device has no medium.\r | |
141 | @retval EFI_MEDIA_CHANGED The device has a different medium in it or the\r | |
142 | medium is no longer supported.\r | |
143 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
144 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
145 | @retval EFI_WRITE_PROTECTED An attempt was made to create a file, or open a\r | |
146 | file for write when the media is\r | |
147 | write-protected.\r | |
148 | @retval EFI_ACCESS_DENIED The service denied access to the file.\r | |
149 | @retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the\r | |
150 | file.\r | |
151 | @retval EFI_VOLUME_FULL The volume is full.\r | |
152 | **/\r | |
153 | STATIC\r | |
154 | EFI_STATUS\r | |
155 | EFIAPI\r | |
156 | StubFileOpen (\r | |
157 | IN EFI_FILE_PROTOCOL *This,\r | |
158 | OUT EFI_FILE_PROTOCOL **NewHandle,\r | |
159 | IN CHAR16 *FileName,\r | |
160 | IN UINT64 OpenMode,\r | |
161 | IN UINT64 Attributes\r | |
162 | )\r | |
163 | {\r | |
164 | CONST STUB_FILE *StubFile;\r | |
165 | UINTN BlobType;\r | |
166 | STUB_FILE *NewStubFile;\r | |
167 | \r | |
168 | //\r | |
169 | // We're read-only.\r | |
170 | //\r | |
171 | switch (OpenMode) {\r | |
172 | case EFI_FILE_MODE_READ:\r | |
173 | break;\r | |
174 | \r | |
175 | case EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE:\r | |
176 | case EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE:\r | |
177 | return EFI_WRITE_PROTECTED;\r | |
178 | \r | |
179 | default:\r | |
180 | return EFI_INVALID_PARAMETER;\r | |
181 | }\r | |
182 | \r | |
183 | //\r | |
184 | // Only the root directory supports opening files in it.\r | |
185 | //\r | |
186 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
187 | if (StubFile->BlobType != KernelBlobTypeMax) {\r | |
188 | return EFI_UNSUPPORTED;\r | |
189 | }\r | |
190 | \r | |
191 | //\r | |
192 | // Locate the file.\r | |
193 | //\r | |
194 | for (BlobType = 0; BlobType < KernelBlobTypeMax; ++BlobType) {\r | |
195 | if (StrCmp (FileName, mKernelBlob[BlobType].Name) == 0) {\r | |
196 | break;\r | |
197 | }\r | |
198 | }\r | |
199 | if (BlobType == KernelBlobTypeMax) {\r | |
200 | return EFI_NOT_FOUND;\r | |
201 | }\r | |
202 | \r | |
203 | //\r | |
204 | // Found it.\r | |
205 | //\r | |
206 | NewStubFile = AllocatePool (sizeof *NewStubFile);\r | |
207 | if (NewStubFile == NULL) {\r | |
208 | return EFI_OUT_OF_RESOURCES;\r | |
209 | }\r | |
210 | \r | |
211 | NewStubFile->Signature = STUB_FILE_SIG;\r | |
212 | NewStubFile->BlobType = (KERNEL_BLOB_TYPE)BlobType;\r | |
213 | NewStubFile->Position = 0;\r | |
214 | CopyMem (&NewStubFile->File, &mEfiFileProtocolTemplate,\r | |
215 | sizeof mEfiFileProtocolTemplate);\r | |
216 | *NewHandle = &NewStubFile->File;\r | |
217 | \r | |
218 | return EFI_SUCCESS;\r | |
219 | }\r | |
220 | \r | |
221 | \r | |
222 | /**\r | |
223 | Closes a specified file handle.\r | |
224 | \r | |
225 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the file\r | |
226 | handle to close.\r | |
227 | \r | |
228 | @retval EFI_SUCCESS The file was closed.\r | |
229 | **/\r | |
230 | STATIC\r | |
231 | EFI_STATUS\r | |
232 | EFIAPI\r | |
233 | StubFileClose (\r | |
234 | IN EFI_FILE_PROTOCOL *This\r | |
235 | )\r | |
236 | {\r | |
237 | FreePool (STUB_FILE_FROM_FILE (This));\r | |
238 | return EFI_SUCCESS;\r | |
239 | }\r | |
240 | \r | |
241 | \r | |
242 | /**\r | |
243 | Close and delete the file handle.\r | |
244 | \r | |
245 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the\r | |
246 | handle to the file to delete.\r | |
247 | \r | |
248 | @retval EFI_SUCCESS The file was closed and deleted, and the\r | |
249 | handle was closed.\r | |
250 | @retval EFI_WARN_DELETE_FAILURE The handle was closed, but the file was not\r | |
251 | deleted.\r | |
252 | \r | |
253 | **/\r | |
254 | STATIC\r | |
255 | EFI_STATUS\r | |
256 | EFIAPI\r | |
257 | StubFileDelete (\r | |
258 | IN EFI_FILE_PROTOCOL *This\r | |
259 | )\r | |
260 | {\r | |
261 | FreePool (STUB_FILE_FROM_FILE (This));\r | |
262 | return EFI_WARN_DELETE_FAILURE;\r | |
263 | }\r | |
264 | \r | |
265 | \r | |
266 | /**\r | |
267 | Helper function that formats an EFI_FILE_INFO structure into the\r | |
268 | user-allocated buffer, for any valid KERNEL_BLOB_TYPE value (including\r | |
269 | KernelBlobTypeMax, which stands for the root directory).\r | |
270 | \r | |
271 | The interface follows the EFI_FILE_GET_INFO -- and for directories, the\r | |
272 | EFI_FILE_READ -- interfaces.\r | |
273 | \r | |
274 | @param[in] BlobType The KERNEL_BLOB_TYPE value identifying the fw_cfg\r | |
275 | blob backing the STUB_FILE that information is\r | |
276 | being requested about. If BlobType equals\r | |
277 | KernelBlobTypeMax, then information will be\r | |
278 | provided about the root directory of the\r | |
279 | filesystem.\r | |
280 | \r | |
281 | @param[in,out] BufferSize On input, the size of Buffer. On output, the\r | |
282 | amount of data returned in Buffer. In both cases,\r | |
283 | the size is measured in bytes.\r | |
284 | \r | |
285 | @param[out] Buffer A pointer to the data buffer to return. The\r | |
286 | buffer's type is EFI_FILE_INFO.\r | |
287 | \r | |
288 | @retval EFI_SUCCESS The information was returned.\r | |
289 | @retval EFI_BUFFER_TOO_SMALL BufferSize is too small to store the\r | |
290 | EFI_FILE_INFO structure. BufferSize has been\r | |
291 | updated with the size needed to complete the\r | |
292 | request.\r | |
293 | **/\r | |
294 | STATIC\r | |
295 | EFI_STATUS\r | |
296 | ConvertKernelBlobTypeToFileInfo (\r | |
297 | IN KERNEL_BLOB_TYPE BlobType,\r | |
298 | IN OUT UINTN *BufferSize,\r | |
299 | OUT VOID *Buffer\r | |
300 | )\r | |
301 | {\r | |
302 | CONST CHAR16 *Name;\r | |
303 | UINT64 FileSize;\r | |
304 | UINT64 Attribute;\r | |
305 | \r | |
306 | UINTN NameSize;\r | |
307 | UINTN FileInfoSize;\r | |
308 | EFI_FILE_INFO *FileInfo;\r | |
309 | UINTN OriginalBufferSize;\r | |
310 | \r | |
311 | if (BlobType == KernelBlobTypeMax) {\r | |
312 | //\r | |
313 | // getting file info about the root directory\r | |
314 | //\r | |
315 | Name = L"\\";\r | |
316 | FileSize = KernelBlobTypeMax;\r | |
317 | Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;\r | |
318 | } else {\r | |
319 | CONST KERNEL_BLOB *Blob;\r | |
320 | \r | |
321 | Blob = &mKernelBlob[BlobType];\r | |
322 | Name = Blob->Name;\r | |
323 | FileSize = Blob->Size;\r | |
324 | Attribute = EFI_FILE_READ_ONLY;\r | |
325 | }\r | |
326 | \r | |
327 | NameSize = (StrLen(Name) + 1) * 2;\r | |
328 | FileInfoSize = OFFSET_OF (EFI_FILE_INFO, FileName) + NameSize;\r | |
329 | ASSERT (FileInfoSize >= sizeof *FileInfo);\r | |
330 | \r | |
331 | OriginalBufferSize = *BufferSize;\r | |
332 | *BufferSize = FileInfoSize;\r | |
333 | if (OriginalBufferSize < *BufferSize) {\r | |
334 | return EFI_BUFFER_TOO_SMALL;\r | |
335 | }\r | |
336 | \r | |
337 | FileInfo = (EFI_FILE_INFO *)Buffer;\r | |
338 | FileInfo->Size = FileInfoSize;\r | |
339 | FileInfo->FileSize = FileSize;\r | |
340 | FileInfo->PhysicalSize = FileSize;\r | |
341 | FileInfo->Attribute = Attribute;\r | |
342 | \r | |
343 | CopyMem (&FileInfo->CreateTime, &mInitTime, sizeof mInitTime);\r | |
344 | CopyMem (&FileInfo->LastAccessTime, &mInitTime, sizeof mInitTime);\r | |
345 | CopyMem (&FileInfo->ModificationTime, &mInitTime, sizeof mInitTime);\r | |
346 | CopyMem (FileInfo->FileName, Name, NameSize);\r | |
347 | \r | |
348 | return EFI_SUCCESS;\r | |
349 | }\r | |
350 | \r | |
351 | \r | |
352 | /**\r | |
353 | Reads data from a file, or continues scanning a directory.\r | |
354 | \r | |
355 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that\r | |
356 | is the file handle to read data from.\r | |
357 | \r | |
358 | @param[in,out] BufferSize On input, the size of the Buffer. On output, the\r | |
359 | amount of data returned in Buffer. In both cases,\r | |
360 | the size is measured in bytes. If the read goes\r | |
361 | beyond the end of the file, the read length is\r | |
362 | truncated to the end of the file.\r | |
363 | \r | |
364 | If This is a directory, the function reads the\r | |
365 | directory entry at the current position and\r | |
366 | returns the entry (as EFI_FILE_INFO) in Buffer. If\r | |
367 | there are no more directory entries, the\r | |
368 | BufferSize is set to zero on output.\r | |
369 | \r | |
370 | @param[out] Buffer The buffer into which the data is read.\r | |
371 | \r | |
372 | @retval EFI_SUCCESS Data was read.\r | |
373 | @retval EFI_NO_MEDIA The device has no medium.\r | |
374 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
375 | @retval EFI_DEVICE_ERROR An attempt was made to read from a deleted\r | |
376 | file.\r | |
377 | @retval EFI_DEVICE_ERROR On entry, the current file position is beyond\r | |
378 | the end of the file.\r | |
379 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
380 | @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to store the\r | |
381 | current directory entry as a EFI_FILE_INFO\r | |
382 | structure. BufferSize has been updated with the\r | |
383 | size needed to complete the request, and the\r | |
384 | directory position has not been advanced.\r | |
385 | **/\r | |
386 | STATIC\r | |
387 | EFI_STATUS\r | |
388 | EFIAPI\r | |
389 | StubFileRead (\r | |
390 | IN EFI_FILE_PROTOCOL *This,\r | |
391 | IN OUT UINTN *BufferSize,\r | |
392 | OUT VOID *Buffer\r | |
393 | )\r | |
394 | {\r | |
395 | STUB_FILE *StubFile;\r | |
396 | CONST KERNEL_BLOB *Blob;\r | |
397 | UINT64 Left;\r | |
398 | \r | |
399 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
400 | \r | |
401 | //\r | |
402 | // Scanning the root directory?\r | |
403 | //\r | |
404 | if (StubFile->BlobType == KernelBlobTypeMax) {\r | |
405 | EFI_STATUS Status;\r | |
406 | \r | |
407 | if (StubFile->Position == KernelBlobTypeMax) {\r | |
408 | //\r | |
409 | // Scanning complete.\r | |
410 | //\r | |
411 | *BufferSize = 0;\r | |
412 | return EFI_SUCCESS;\r | |
413 | }\r | |
414 | \r | |
415 | Status = ConvertKernelBlobTypeToFileInfo (\r | |
416 | (KERNEL_BLOB_TYPE)StubFile->Position,\r | |
417 | BufferSize,\r | |
418 | Buffer);\r | |
419 | if (EFI_ERROR (Status)) {\r | |
420 | return Status;\r | |
421 | }\r | |
422 | \r | |
423 | ++StubFile->Position;\r | |
424 | return EFI_SUCCESS;\r | |
425 | }\r | |
426 | \r | |
427 | //\r | |
428 | // Reading a file.\r | |
429 | //\r | |
430 | Blob = &mKernelBlob[StubFile->BlobType];\r | |
431 | if (StubFile->Position > Blob->Size) {\r | |
432 | return EFI_DEVICE_ERROR;\r | |
433 | }\r | |
434 | \r | |
435 | Left = Blob->Size - StubFile->Position;\r | |
436 | if (*BufferSize > Left) {\r | |
437 | *BufferSize = (UINTN)Left;\r | |
438 | }\r | |
439 | if (Blob->Data != NULL) {\r | |
440 | CopyMem (Buffer, Blob->Data + StubFile->Position, *BufferSize);\r | |
441 | }\r | |
442 | StubFile->Position += *BufferSize;\r | |
443 | return EFI_SUCCESS;\r | |
444 | }\r | |
445 | \r | |
446 | \r | |
447 | /**\r | |
448 | Writes data to a file.\r | |
449 | \r | |
450 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that\r | |
451 | is the file handle to write data to.\r | |
452 | \r | |
453 | @param[in,out] BufferSize On input, the size of the Buffer. On output, the\r | |
454 | amount of data actually written. In both cases,\r | |
455 | the size is measured in bytes.\r | |
456 | \r | |
457 | @param[in] Buffer The buffer of data to write.\r | |
458 | \r | |
459 | @retval EFI_SUCCESS Data was written.\r | |
460 | @retval EFI_UNSUPPORTED Writes to open directory files are not\r | |
461 | supported.\r | |
462 | @retval EFI_NO_MEDIA The device has no medium.\r | |
463 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
464 | @retval EFI_DEVICE_ERROR An attempt was made to write to a deleted file.\r | |
465 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
466 | @retval EFI_WRITE_PROTECTED The file or medium is write-protected.\r | |
467 | @retval EFI_ACCESS_DENIED The file was opened read only.\r | |
468 | @retval EFI_VOLUME_FULL The volume is full.\r | |
469 | **/\r | |
470 | STATIC\r | |
471 | EFI_STATUS\r | |
472 | EFIAPI\r | |
473 | StubFileWrite (\r | |
474 | IN EFI_FILE_PROTOCOL *This,\r | |
475 | IN OUT UINTN *BufferSize,\r | |
476 | IN VOID *Buffer\r | |
477 | )\r | |
478 | {\r | |
479 | STUB_FILE *StubFile;\r | |
480 | \r | |
481 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
482 | return (StubFile->BlobType == KernelBlobTypeMax) ?\r | |
483 | EFI_UNSUPPORTED :\r | |
484 | EFI_WRITE_PROTECTED;\r | |
485 | }\r | |
486 | \r | |
487 | \r | |
488 | /**\r | |
489 | Returns a file's current position.\r | |
490 | \r | |
491 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the\r | |
492 | file handle to get the current position on.\r | |
493 | \r | |
494 | @param[out] Position The address to return the file's current position\r | |
495 | value.\r | |
496 | \r | |
497 | @retval EFI_SUCCESS The position was returned.\r | |
498 | @retval EFI_UNSUPPORTED The request is not valid on open directories.\r | |
499 | @retval EFI_DEVICE_ERROR An attempt was made to get the position from a\r | |
500 | deleted file.\r | |
501 | **/\r | |
502 | STATIC\r | |
503 | EFI_STATUS\r | |
504 | EFIAPI\r | |
505 | StubFileGetPosition (\r | |
506 | IN EFI_FILE_PROTOCOL *This,\r | |
507 | OUT UINT64 *Position\r | |
508 | )\r | |
509 | {\r | |
510 | STUB_FILE *StubFile;\r | |
511 | \r | |
512 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
513 | if (StubFile->BlobType == KernelBlobTypeMax) {\r | |
514 | return EFI_UNSUPPORTED;\r | |
515 | }\r | |
516 | \r | |
517 | *Position = StubFile->Position;\r | |
518 | return EFI_SUCCESS;\r | |
519 | }\r | |
520 | \r | |
521 | \r | |
522 | /**\r | |
523 | Sets a file's current position.\r | |
524 | \r | |
525 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the\r | |
526 | file handle to set the requested position on.\r | |
527 | \r | |
528 | @param[in] Position The byte position from the start of the file to set. For\r | |
529 | regular files, MAX_UINT64 means "seek to end". For\r | |
530 | directories, zero means "rewind directory scan".\r | |
531 | \r | |
532 | @retval EFI_SUCCESS The position was set.\r | |
533 | @retval EFI_UNSUPPORTED The seek request for nonzero is not valid on open\r | |
534 | directories.\r | |
535 | @retval EFI_DEVICE_ERROR An attempt was made to set the position of a\r | |
536 | deleted file.\r | |
537 | **/\r | |
538 | STATIC\r | |
539 | EFI_STATUS\r | |
540 | EFIAPI\r | |
541 | StubFileSetPosition (\r | |
542 | IN EFI_FILE_PROTOCOL *This,\r | |
543 | IN UINT64 Position\r | |
544 | )\r | |
545 | {\r | |
546 | STUB_FILE *StubFile;\r | |
547 | KERNEL_BLOB *Blob;\r | |
548 | \r | |
549 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
550 | \r | |
551 | if (StubFile->BlobType == KernelBlobTypeMax) {\r | |
552 | if (Position == 0) {\r | |
553 | //\r | |
554 | // rewinding a directory scan is allowed\r | |
555 | //\r | |
556 | StubFile->Position = 0;\r | |
557 | return EFI_SUCCESS;\r | |
558 | }\r | |
559 | return EFI_UNSUPPORTED;\r | |
560 | }\r | |
561 | \r | |
562 | //\r | |
563 | // regular file seek\r | |
564 | //\r | |
565 | Blob = &mKernelBlob[StubFile->BlobType];\r | |
566 | if (Position == MAX_UINT64) {\r | |
567 | //\r | |
568 | // seek to end\r | |
569 | //\r | |
570 | StubFile->Position = Blob->Size;\r | |
571 | } else {\r | |
572 | //\r | |
573 | // absolute seek from beginning -- seeking past the end is allowed\r | |
574 | //\r | |
575 | StubFile->Position = Position;\r | |
576 | }\r | |
577 | return EFI_SUCCESS;\r | |
578 | }\r | |
579 | \r | |
580 | \r | |
581 | /**\r | |
582 | Returns information about a file.\r | |
583 | \r | |
584 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance\r | |
585 | that is the file handle the requested\r | |
586 | information is for.\r | |
587 | \r | |
588 | @param[in] InformationType The type identifier GUID for the information\r | |
589 | being requested. The following information\r | |
590 | types are supported, storing the\r | |
591 | corresponding structures in Buffer:\r | |
592 | \r | |
593 | - gEfiFileInfoGuid: EFI_FILE_INFO\r | |
594 | \r | |
595 | - gEfiFileSystemInfoGuid:\r | |
596 | EFI_FILE_SYSTEM_INFO\r | |
597 | \r | |
598 | - gEfiFileSystemVolumeLabelInfoIdGuid:\r | |
599 | EFI_FILE_SYSTEM_VOLUME_LABEL\r | |
600 | \r | |
601 | @param[in,out] BufferSize On input, the size of Buffer. On output, the\r | |
602 | amount of data returned in Buffer. In both\r | |
603 | cases, the size is measured in bytes.\r | |
604 | \r | |
605 | @param[out] Buffer A pointer to the data buffer to return. The\r | |
606 | buffer's type is indicated by\r | |
607 | InformationType.\r | |
608 | \r | |
609 | @retval EFI_SUCCESS The information was returned.\r | |
610 | @retval EFI_UNSUPPORTED The InformationType is not known.\r | |
611 | @retval EFI_NO_MEDIA The device has no medium.\r | |
612 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
613 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
614 | @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to store the\r | |
615 | information structure requested by\r | |
616 | InformationType. BufferSize has been updated\r | |
617 | with the size needed to complete the request.\r | |
618 | **/\r | |
619 | STATIC\r | |
620 | EFI_STATUS\r | |
621 | EFIAPI\r | |
622 | StubFileGetInfo (\r | |
623 | IN EFI_FILE_PROTOCOL *This,\r | |
624 | IN EFI_GUID *InformationType,\r | |
625 | IN OUT UINTN *BufferSize,\r | |
626 | OUT VOID *Buffer\r | |
627 | )\r | |
628 | {\r | |
629 | CONST STUB_FILE *StubFile;\r | |
630 | UINTN OriginalBufferSize;\r | |
631 | \r | |
632 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
633 | \r | |
634 | if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {\r | |
635 | return ConvertKernelBlobTypeToFileInfo (StubFile->BlobType, BufferSize,\r | |
636 | Buffer);\r | |
637 | }\r | |
638 | \r | |
639 | OriginalBufferSize = *BufferSize;\r | |
640 | \r | |
641 | if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {\r | |
642 | EFI_FILE_SYSTEM_INFO *FileSystemInfo;\r | |
643 | \r | |
644 | *BufferSize = sizeof *FileSystemInfo;\r | |
645 | if (OriginalBufferSize < *BufferSize) {\r | |
646 | return EFI_BUFFER_TOO_SMALL;\r | |
647 | }\r | |
648 | \r | |
649 | FileSystemInfo = (EFI_FILE_SYSTEM_INFO *)Buffer;\r | |
650 | FileSystemInfo->Size = sizeof *FileSystemInfo;\r | |
651 | FileSystemInfo->ReadOnly = TRUE;\r | |
652 | FileSystemInfo->VolumeSize = mTotalBlobBytes;\r | |
653 | FileSystemInfo->FreeSpace = 0;\r | |
654 | FileSystemInfo->BlockSize = 1;\r | |
655 | FileSystemInfo->VolumeLabel[0] = L'\0';\r | |
656 | \r | |
657 | return EFI_SUCCESS;\r | |
658 | }\r | |
659 | \r | |
660 | if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {\r | |
661 | EFI_FILE_SYSTEM_VOLUME_LABEL *FileSystemVolumeLabel;\r | |
662 | \r | |
663 | *BufferSize = sizeof *FileSystemVolumeLabel;\r | |
664 | if (OriginalBufferSize < *BufferSize) {\r | |
665 | return EFI_BUFFER_TOO_SMALL;\r | |
666 | }\r | |
667 | \r | |
668 | FileSystemVolumeLabel = (EFI_FILE_SYSTEM_VOLUME_LABEL *)Buffer;\r | |
669 | FileSystemVolumeLabel->VolumeLabel[0] = L'\0';\r | |
670 | \r | |
671 | return EFI_SUCCESS;\r | |
672 | }\r | |
673 | \r | |
674 | return EFI_UNSUPPORTED;\r | |
675 | }\r | |
676 | \r | |
677 | \r | |
678 | /**\r | |
679 | Sets information about a file.\r | |
680 | \r | |
681 | @param[in] File A pointer to the EFI_FILE_PROTOCOL instance that\r | |
682 | is the file handle the information is for.\r | |
683 | \r | |
684 | @param[in] InformationType The type identifier for the information being\r | |
685 | set.\r | |
686 | \r | |
687 | @param[in] BufferSize The size, in bytes, of Buffer.\r | |
688 | \r | |
689 | @param[in] Buffer A pointer to the data buffer to write. The\r | |
690 | buffer's type is indicated by InformationType.\r | |
691 | \r | |
692 | @retval EFI_SUCCESS The information was set.\r | |
693 | @retval EFI_UNSUPPORTED The InformationType is not known.\r | |
694 | @retval EFI_NO_MEDIA The device has no medium.\r | |
695 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
696 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
697 | @retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_INFO_ID and the\r | |
698 | media is read-only.\r | |
699 | @retval EFI_WRITE_PROTECTED InformationType is\r | |
700 | EFI_FILE_PROTOCOL_SYSTEM_INFO_ID and the media\r | |
701 | is read only.\r | |
702 | @retval EFI_WRITE_PROTECTED InformationType is\r | |
703 | EFI_FILE_SYSTEM_VOLUME_LABEL_ID and the media\r | |
704 | is read-only.\r | |
705 | @retval EFI_ACCESS_DENIED An attempt is made to change the name of a file\r | |
706 | to a file that is already present.\r | |
707 | @retval EFI_ACCESS_DENIED An attempt is being made to change the\r | |
708 | EFI_FILE_DIRECTORY Attribute.\r | |
709 | @retval EFI_ACCESS_DENIED An attempt is being made to change the size of\r | |
710 | a directory.\r | |
711 | @retval EFI_ACCESS_DENIED InformationType is EFI_FILE_INFO_ID and the\r | |
712 | file was opened read-only and an attempt is\r | |
713 | being made to modify a field other than\r | |
714 | Attribute.\r | |
715 | @retval EFI_VOLUME_FULL The volume is full.\r | |
716 | @retval EFI_BAD_BUFFER_SIZE BufferSize is smaller than the size of the type\r | |
717 | indicated by InformationType.\r | |
718 | **/\r | |
719 | STATIC\r | |
720 | EFI_STATUS\r | |
721 | EFIAPI\r | |
722 | StubFileSetInfo (\r | |
723 | IN EFI_FILE_PROTOCOL *This,\r | |
724 | IN EFI_GUID *InformationType,\r | |
725 | IN UINTN BufferSize,\r | |
726 | IN VOID *Buffer\r | |
727 | )\r | |
728 | {\r | |
729 | return EFI_WRITE_PROTECTED;\r | |
730 | }\r | |
731 | \r | |
732 | \r | |
733 | /**\r | |
734 | Flushes all modified data associated with a file to a device.\r | |
735 | \r | |
736 | @param [in] This A pointer to the EFI_FILE_PROTOCOL instance that is the\r | |
737 | file handle to flush.\r | |
738 | \r | |
739 | @retval EFI_SUCCESS The data was flushed.\r | |
740 | @retval EFI_NO_MEDIA The device has no medium.\r | |
741 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
742 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
743 | @retval EFI_WRITE_PROTECTED The file or medium is write-protected.\r | |
744 | @retval EFI_ACCESS_DENIED The file was opened read-only.\r | |
745 | @retval EFI_VOLUME_FULL The volume is full.\r | |
746 | **/\r | |
747 | STATIC\r | |
748 | EFI_STATUS\r | |
749 | EFIAPI\r | |
750 | StubFileFlush (\r | |
751 | IN EFI_FILE_PROTOCOL *This\r | |
752 | )\r | |
753 | {\r | |
754 | return EFI_WRITE_PROTECTED;\r | |
755 | }\r | |
756 | \r | |
757 | //\r | |
758 | // External definition of the file protocol template.\r | |
759 | //\r | |
760 | STATIC CONST EFI_FILE_PROTOCOL mEfiFileProtocolTemplate = {\r | |
761 | EFI_FILE_PROTOCOL_REVISION, // revision 1\r | |
762 | StubFileOpen,\r | |
763 | StubFileClose,\r | |
764 | StubFileDelete,\r | |
765 | StubFileRead,\r | |
766 | StubFileWrite,\r | |
767 | StubFileGetPosition,\r | |
768 | StubFileSetPosition,\r | |
769 | StubFileGetInfo,\r | |
770 | StubFileSetInfo,\r | |
771 | StubFileFlush,\r | |
772 | NULL, // OpenEx, revision 2\r | |
773 | NULL, // ReadEx, revision 2\r | |
774 | NULL, // WriteEx, revision 2\r | |
775 | NULL // FlushEx, revision 2\r | |
776 | };\r | |
777 | \r | |
778 | \r | |
779 | //\r | |
780 | // Protocol member functions for SimpleFileSystem.\r | |
781 | //\r | |
782 | \r | |
783 | /**\r | |
784 | Open the root directory on a volume.\r | |
785 | \r | |
786 | @param[in] This A pointer to the volume to open the root directory on.\r | |
787 | \r | |
788 | @param[out] Root A pointer to the location to return the opened file handle\r | |
789 | for the root directory in.\r | |
790 | \r | |
791 | @retval EFI_SUCCESS The device was opened.\r | |
792 | @retval EFI_UNSUPPORTED This volume does not support the requested file\r | |
793 | system type.\r | |
794 | @retval EFI_NO_MEDIA The device has no medium.\r | |
795 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
796 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
797 | @retval EFI_ACCESS_DENIED The service denied access to the file.\r | |
798 | @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of\r | |
799 | resources.\r | |
800 | @retval EFI_MEDIA_CHANGED The device has a different medium in it or the\r | |
801 | medium is no longer supported. Any existing\r | |
802 | file handles for this volume are no longer\r | |
803 | valid. To access the files on the new medium,\r | |
804 | the volume must be reopened with OpenVolume().\r | |
805 | **/\r | |
806 | STATIC\r | |
807 | EFI_STATUS\r | |
808 | EFIAPI\r | |
809 | StubFileSystemOpenVolume (\r | |
810 | IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,\r | |
811 | OUT EFI_FILE_PROTOCOL **Root\r | |
812 | )\r | |
813 | {\r | |
814 | STUB_FILE *StubFile;\r | |
815 | \r | |
816 | StubFile = AllocatePool (sizeof *StubFile);\r | |
817 | if (StubFile == NULL) {\r | |
818 | return EFI_OUT_OF_RESOURCES;\r | |
819 | }\r | |
820 | \r | |
821 | StubFile->Signature = STUB_FILE_SIG;\r | |
822 | StubFile->BlobType = KernelBlobTypeMax;\r | |
823 | StubFile->Position = 0;\r | |
824 | CopyMem (&StubFile->File, &mEfiFileProtocolTemplate,\r | |
825 | sizeof mEfiFileProtocolTemplate);\r | |
826 | *Root = &StubFile->File;\r | |
827 | \r | |
828 | return EFI_SUCCESS;\r | |
829 | }\r | |
830 | \r | |
831 | STATIC CONST EFI_SIMPLE_FILE_SYSTEM_PROTOCOL mFileSystem = {\r | |
832 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,\r | |
833 | StubFileSystemOpenVolume\r | |
834 | };\r | |
835 | \r | |
836 | \r | |
837 | //\r | |
838 | // Utility functions.\r | |
839 | //\r | |
840 | \r | |
841 | /**\r | |
842 | Populate a blob in mKernelBlob.\r | |
843 | \r | |
844 | param[in,out] Blob Pointer to the KERNEL_BLOB element in mKernelBlob that is\r | |
845 | to be filled from fw_cfg.\r | |
846 | \r | |
847 | @retval EFI_SUCCESS Blob has been populated. If fw_cfg reported a\r | |
848 | size of zero for the blob, then Blob->Data has\r | |
849 | been left unchanged.\r | |
850 | \r | |
851 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory for Blob->Data.\r | |
852 | **/\r | |
853 | STATIC\r | |
854 | EFI_STATUS\r | |
855 | FetchBlob (\r | |
856 | IN OUT KERNEL_BLOB *Blob\r | |
857 | )\r | |
858 | {\r | |
859 | UINT32 Left;\r | |
860 | \r | |
861 | //\r | |
862 | // Read blob size.\r | |
863 | //\r | |
864 | QemuFwCfgSelectItem (Blob->SizeKey);\r | |
865 | Blob->Size = QemuFwCfgRead32 ();\r | |
866 | if (Blob->Size == 0) {\r | |
867 | return EFI_SUCCESS;\r | |
868 | }\r | |
869 | \r | |
870 | //\r | |
871 | // Read blob.\r | |
872 | //\r | |
873 | Blob->Data = AllocatePool (Blob->Size);\r | |
874 | if (Blob->Data == NULL) {\r | |
875 | DEBUG ((EFI_D_ERROR, "%a: failed to allocate %Ld bytes for \"%s\"\n",\r | |
876 | __FUNCTION__, (INT64)Blob->Size, Blob->Name));\r | |
877 | return EFI_OUT_OF_RESOURCES;\r | |
878 | }\r | |
879 | \r | |
880 | DEBUG ((EFI_D_INFO, "%a: loading %Ld bytes for \"%s\"\n", __FUNCTION__,\r | |
881 | (INT64)Blob->Size, Blob->Name));\r | |
882 | QemuFwCfgSelectItem (Blob->DataKey);\r | |
883 | \r | |
884 | Left = Blob->Size;\r | |
885 | do {\r | |
886 | UINT32 Chunk;\r | |
887 | \r | |
888 | Chunk = (Left < SIZE_1MB) ? Left : SIZE_1MB;\r | |
889 | QemuFwCfgReadBytes (Chunk, Blob->Data + (Blob->Size - Left));\r | |
890 | Left -= Chunk;\r | |
891 | DEBUG ((EFI_D_VERBOSE, "%a: %Ld bytes remaining for \"%s\"\n",\r | |
892 | __FUNCTION__, (INT64)Left, Blob->Name));\r | |
893 | } while (Left > 0);\r | |
894 | return EFI_SUCCESS;\r | |
895 | }\r | |
896 | \r | |
897 | \r | |
898 | //\r | |
899 | // The entry point of the feature.\r | |
900 | //\r | |
901 | \r | |
902 | /**\r | |
903 | Download the kernel, the initial ramdisk, and the kernel command line from\r | |
904 | QEMU's fw_cfg. Construct a minimal SimpleFileSystem that contains the two\r | |
905 | image files, and load and start the kernel from it.\r | |
906 | \r | |
907 | The kernel will be instructed via its command line to load the initrd from\r | |
908 | the same Simple FileSystem.\r | |
909 | \r | |
910 | @retval EFI_NOT_FOUND Kernel image was not found.\r | |
911 | @retval EFI_OUT_OF_RESOURCES Memory allocation failed.\r | |
912 | @retval EFI_PROTOCOL_ERROR Unterminated kernel command line.\r | |
913 | \r | |
914 | @return Error codes from any of the underlying\r | |
915 | functions. On success, the function doesn't\r | |
916 | return.\r | |
917 | **/\r | |
918 | EFI_STATUS\r | |
919 | EFIAPI\r | |
920 | TryRunningQemuKernel (\r | |
921 | VOID\r | |
922 | )\r | |
923 | {\r | |
924 | UINTN BlobType;\r | |
925 | KERNEL_BLOB *CurrentBlob;\r | |
926 | KERNEL_BLOB *KernelBlob, *InitrdBlob, *CommandLineBlob;\r | |
927 | EFI_STATUS Status;\r | |
928 | EFI_HANDLE FileSystemHandle;\r | |
929 | EFI_DEVICE_PATH_PROTOCOL *KernelDevicePath;\r | |
930 | EFI_HANDLE KernelImageHandle;\r | |
931 | EFI_LOADED_IMAGE_PROTOCOL *KernelLoadedImage;\r | |
932 | \r | |
933 | Status = gRT->GetTime (&mInitTime, NULL /* Capabilities */);\r | |
934 | if (EFI_ERROR (Status)) {\r | |
935 | DEBUG ((EFI_D_ERROR, "%a: GetTime(): %r\n", __FUNCTION__, Status));\r | |
936 | return Status;\r | |
937 | }\r | |
938 | \r | |
939 | //\r | |
940 | // Fetch all blobs.\r | |
941 | //\r | |
942 | for (BlobType = 0; BlobType < KernelBlobTypeMax; ++BlobType) {\r | |
943 | CurrentBlob = &mKernelBlob[BlobType];\r | |
944 | Status = FetchBlob (CurrentBlob);\r | |
945 | if (EFI_ERROR (Status)) {\r | |
946 | goto FreeBlobs;\r | |
947 | }\r | |
948 | mTotalBlobBytes += CurrentBlob->Size;\r | |
949 | }\r | |
950 | KernelBlob = &mKernelBlob[KernelBlobTypeKernel];\r | |
951 | InitrdBlob = &mKernelBlob[KernelBlobTypeInitrd];\r | |
952 | CommandLineBlob = &mKernelBlob[KernelBlobTypeCommandLine];\r | |
953 | \r | |
954 | if (KernelBlob->Data == NULL) {\r | |
955 | Status = EFI_NOT_FOUND;\r | |
956 | goto FreeBlobs;\r | |
957 | }\r | |
958 | \r | |
959 | //\r | |
960 | // Create a new handle with a single VenHw() node device path protocol on it,\r | |
961 | // plus a custom SimpleFileSystem protocol on it.\r | |
962 | //\r | |
963 | FileSystemHandle = NULL;\r | |
964 | Status = gBS->InstallMultipleProtocolInterfaces (&FileSystemHandle,\r | |
965 | &gEfiDevicePathProtocolGuid, &mFileSystemDevicePath,\r | |
966 | &gEfiSimpleFileSystemProtocolGuid, &mFileSystem,\r | |
967 | NULL);\r | |
968 | if (EFI_ERROR (Status)) {\r | |
969 | DEBUG ((EFI_D_ERROR, "%a: InstallMultipleProtocolInterfaces(): %r\n",\r | |
970 | __FUNCTION__, Status));\r | |
971 | goto FreeBlobs;\r | |
972 | }\r | |
973 | \r | |
974 | //\r | |
975 | // Create a device path for the kernel image to be loaded from that will call\r | |
976 | // back into our file system.\r | |
977 | //\r | |
978 | KernelDevicePath = FileDevicePath (FileSystemHandle, KernelBlob->Name);\r | |
979 | if (KernelDevicePath == NULL) {\r | |
980 | DEBUG ((EFI_D_ERROR, "%a: failed to allocate kernel device path\n",\r | |
981 | __FUNCTION__));\r | |
982 | Status = EFI_OUT_OF_RESOURCES;\r | |
983 | goto UninstallProtocols;\r | |
984 | }\r | |
985 | \r | |
986 | //\r | |
987 | // Load the image. This should call back into our file system.\r | |
988 | //\r | |
989 | Status = gBS->LoadImage (\r | |
990 | FALSE, // BootPolicy: exact match required\r | |
991 | gImageHandle, // ParentImageHandle\r | |
992 | KernelDevicePath,\r | |
993 | NULL, // SourceBuffer\r | |
994 | 0, // SourceSize\r | |
995 | &KernelImageHandle\r | |
996 | );\r | |
997 | if (EFI_ERROR (Status)) {\r | |
998 | DEBUG ((EFI_D_ERROR, "%a: LoadImage(): %r\n", __FUNCTION__, Status));\r | |
999 | goto FreeKernelDevicePath;\r | |
1000 | }\r | |
1001 | \r | |
1002 | //\r | |
1003 | // Construct the kernel command line.\r | |
1004 | //\r | |
1005 | Status = gBS->OpenProtocol (\r | |
1006 | KernelImageHandle,\r | |
1007 | &gEfiLoadedImageProtocolGuid,\r | |
1008 | (VOID **)&KernelLoadedImage,\r | |
1009 | gImageHandle, // AgentHandle\r | |
1010 | NULL, // ControllerHandle\r | |
1011 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
1012 | );\r | |
1013 | ASSERT_EFI_ERROR (Status);\r | |
1014 | \r | |
1015 | if (CommandLineBlob->Data == NULL) {\r | |
1016 | KernelLoadedImage->LoadOptionsSize = 0;\r | |
1017 | } else {\r | |
1018 | //\r | |
1019 | // Verify NUL-termination of the command line.\r | |
1020 | //\r | |
1021 | if (CommandLineBlob->Data[CommandLineBlob->Size - 1] != '\0') {\r | |
1022 | DEBUG ((EFI_D_ERROR, "%a: kernel command line is not NUL-terminated\n",\r | |
1023 | __FUNCTION__));\r | |
1024 | Status = EFI_PROTOCOL_ERROR;\r | |
1025 | goto UnloadKernelImage;\r | |
1026 | }\r | |
1027 | \r | |
1028 | //\r | |
1029 | // Drop the terminating NUL, convert to UTF-16.\r | |
1030 | //\r | |
1031 | KernelLoadedImage->LoadOptionsSize = (CommandLineBlob->Size - 1) * 2;\r | |
1032 | }\r | |
1033 | \r | |
1034 | if (InitrdBlob->Data != NULL) {\r | |
1035 | //\r | |
1036 | // Append ' initrd=<name>' in UTF-16.\r | |
1037 | //\r | |
1038 | KernelLoadedImage->LoadOptionsSize +=\r | |
1039 | (8 + StrLen(InitrdBlob->Name)) * 2;\r | |
1040 | }\r | |
1041 | \r | |
1042 | if (KernelLoadedImage->LoadOptionsSize == 0) {\r | |
1043 | KernelLoadedImage->LoadOptions = NULL;\r | |
1044 | } else {\r | |
1045 | //\r | |
1046 | // NUL-terminate in UTF-16.\r | |
1047 | //\r | |
1048 | KernelLoadedImage->LoadOptionsSize += 2;\r | |
1049 | \r | |
1050 | KernelLoadedImage->LoadOptions = AllocatePool (\r | |
1051 | KernelLoadedImage->LoadOptionsSize);\r | |
1052 | if (KernelLoadedImage->LoadOptions == NULL) {\r | |
1053 | KernelLoadedImage->LoadOptionsSize = 0;\r | |
1054 | Status = EFI_OUT_OF_RESOURCES;\r | |
1055 | goto UnloadKernelImage;\r | |
1056 | }\r | |
1057 | \r | |
1058 | UnicodeSPrintAsciiFormat (\r | |
1059 | KernelLoadedImage->LoadOptions,\r | |
1060 | KernelLoadedImage->LoadOptionsSize,\r | |
1061 | "%a%a%s",\r | |
1062 | (CommandLineBlob->Data == NULL) ? "" : (CHAR8 *)CommandLineBlob->Data,\r | |
1063 | (InitrdBlob->Data == NULL) ? "" : " initrd=",\r | |
1064 | (InitrdBlob->Data == NULL) ? L"" : InitrdBlob->Name\r | |
1065 | );\r | |
1066 | DEBUG ((EFI_D_INFO, "%a: command line: \"%s\"\n", __FUNCTION__,\r | |
1067 | (CHAR16 *)KernelLoadedImage->LoadOptions));\r | |
1068 | }\r | |
1069 | \r | |
1070 | //\r | |
1071 | // Signal the EFI_EVENT_GROUP_READY_TO_BOOT event.\r | |
1072 | //\r | |
1073 | EfiSignalEventReadyToBoot();\r | |
1074 | \r | |
1075 | //\r | |
1076 | // Start the image.\r | |
1077 | //\r | |
1078 | Status = gBS->StartImage (\r | |
1079 | KernelImageHandle,\r | |
1080 | NULL, // ExitDataSize\r | |
1081 | NULL // ExitData\r | |
1082 | );\r | |
1083 | if (EFI_ERROR (Status)) {\r | |
1084 | DEBUG ((EFI_D_ERROR, "%a: StartImage(): %r\n", __FUNCTION__, Status));\r | |
1085 | }\r | |
1086 | \r | |
1087 | if (KernelLoadedImage->LoadOptions != NULL) {\r | |
1088 | FreePool (KernelLoadedImage->LoadOptions);\r | |
1089 | }\r | |
1090 | KernelLoadedImage->LoadOptionsSize = 0;\r | |
1091 | \r | |
1092 | UnloadKernelImage:\r | |
1093 | gBS->UnloadImage (KernelImageHandle);\r | |
1094 | \r | |
1095 | FreeKernelDevicePath:\r | |
1096 | FreePool (KernelDevicePath);\r | |
1097 | \r | |
1098 | UninstallProtocols:\r | |
1099 | gBS->UninstallMultipleProtocolInterfaces (FileSystemHandle,\r | |
1100 | &gEfiSimpleFileSystemProtocolGuid, &mFileSystem,\r | |
1101 | &gEfiDevicePathProtocolGuid, &mFileSystemDevicePath,\r | |
1102 | NULL);\r | |
1103 | \r | |
1104 | FreeBlobs:\r | |
1105 | while (BlobType > 0) {\r | |
1106 | CurrentBlob = &mKernelBlob[--BlobType];\r | |
1107 | if (CurrentBlob->Data != NULL) {\r | |
1108 | FreePool (CurrentBlob->Data);\r | |
1109 | CurrentBlob->Size = 0;\r | |
1110 | CurrentBlob->Data = NULL;\r | |
1111 | }\r | |
1112 | }\r | |
1113 | \r | |
1114 | return Status;\r | |
1115 | }\r |