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878ddf1f | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | ImageRead.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | --*/\r | |
19 | \r | |
20 | #include <DxeIpl.h>\r | |
21 | \r | |
22 | EFI_STATUS\r | |
23 | EFIAPI\r | |
24 | PeiImageRead (\r | |
25 | IN VOID *FileHandle,\r | |
26 | IN UINTN FileOffset,\r | |
27 | IN OUT UINTN *ReadSize,\r | |
28 | OUT VOID *Buffer\r | |
29 | )\r | |
30 | /*++\r | |
31 | \r | |
32 | Routine Description:\r | |
33 | \r | |
34 | Support routine for the PE/COFF Loader that reads a buffer from a PE/COFF file\r | |
35 | \r | |
36 | Arguments:\r | |
37 | \r | |
38 | FileHandle - The handle to the PE/COFF file\r | |
39 | \r | |
40 | FileOffset - The offset, in bytes, into the file to read\r | |
41 | \r | |
42 | ReadSize - The number of bytes to read from the file starting at FileOffset\r | |
43 | \r | |
44 | Buffer - A pointer to the buffer to read the data into.\r | |
45 | \r | |
46 | Returns:\r | |
47 | \r | |
48 | EFI_SUCCESS - ReadSize bytes of data were read into Buffer from the PE/COFF file starting at FileOffset\r | |
49 | \r | |
50 | --*/\r | |
51 | {\r | |
52 | CHAR8 *Destination8;\r | |
53 | CHAR8 *Source8;\r | |
54 | UINTN Length;\r | |
55 | \r | |
56 | Destination8 = Buffer;\r | |
57 | Source8 = (CHAR8 *) ((UINTN) FileHandle + FileOffset);\r | |
58 | Length = *ReadSize;\r | |
59 | while (Length--) {\r | |
60 | *(Destination8++) = *(Source8++);\r | |
61 | }\r | |
62 | \r | |
63 | return EFI_SUCCESS;\r | |
64 | }\r | |
65 | \r | |
66 | EFI_STATUS\r | |
67 | GetImageReadFunction (\r | |
68 | IN PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r | |
69 | )\r | |
70 | /*++\r | |
71 | \r | |
72 | Routine Description:\r | |
73 | \r | |
74 | Support routine to return the PE32 Image Reader.\r | |
75 | If the PeiImageRead() function is less than a page\r | |
76 | in legnth. If the function is more than a page the DXE IPL will crash!!!!\r | |
77 | \r | |
78 | Arguments:\r | |
79 | ImageContext - The context of the image being loaded\r | |
80 | \r | |
81 | Returns:\r | |
82 | \r | |
83 | EFI_SUCCESS - If Image function location is found\r | |
84 | \r | |
85 | --*/\r | |
86 | {\r | |
87 | VOID *MemoryBuffer;\r | |
88 | \r | |
89 | if (gInMemory) {\r | |
90 | ImageContext->ImageRead = PeiImageRead;\r | |
91 | return EFI_SUCCESS;\r | |
92 | }\r | |
93 | \r | |
94 | //\r | |
95 | // BugBug; This code assumes PeiImageRead() is less than a page in size!\r | |
96 | // Allocate a page so we can shaddow the read function from FLASH into \r | |
97 | // memory to increase performance. \r | |
98 | //\r | |
99 | \r | |
100 | MemoryBuffer = AllocateCopyPool (0x400, (VOID *)(UINTN) PeiImageRead);\r | |
101 | ASSERT (MemoryBuffer != NULL);\r | |
102 | \r | |
103 | ImageContext->ImageRead = (PE_COFF_LOADER_READ_FILE) (UINTN) MemoryBuffer;\r | |
104 | \r | |
105 | return EFI_SUCCESS;\r | |
106 | }\r |