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 | UINT8 *Destination32;\r |
53 | UINT8 *Source32;\r |
54 | UINTN Length;\r |
55 | \r |
56 | \r |
57 | Destination32 = Buffer;\r |
58 | Source32 = (UINT8 *) ((UINTN) FileHandle + FileOffset);\r |
59 | \r |
60 | //\r |
61 | // This function assumes 32-bit alignment to increase performance\r |
62 | //\r |
63 | // ASSERT (ALIGN_POINTER (Destination32, sizeof (UINT32)) == Destination32);\r |
64 | // ASSERT (ALIGN_POINTER (Source32, sizeof (UINT32)) == Source32);\r |
65 | \r |
66 | Length = *ReadSize;\r |
67 | while (Length--) {\r |
68 | *(Destination32++) = *(Source32++);\r |
69 | }\r |
70 | \r |
71 | return EFI_SUCCESS;\r |
72 | }\r |
73 | \r |
74 | EFI_STATUS\r |
75 | GetImageReadFunction (\r |
76 | IN PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r |
77 | )\r |
78 | /*++\r |
79 | \r |
80 | Routine Description:\r |
81 | Support routine to return the PE32 Image Reader.\r |
82 | If the PeiImageRead() function is less than a page\r |
83 | in legnth. If the function is more than a page the DXE IPL will crash!!!!\r |
84 | \r |
85 | Arguments:\r |
86 | ImageContext - The context of the image being loaded\r |
87 | \r |
88 | Returns:\r |
89 | EFI_SUCCESS - If Image function location is found\r |
90 | \r |
91 | --*/\r |
92 | {\r |
93 | VOID *MemoryBuffer;\r |
94 | \r |
95 | if (gInMemory) {\r |
96 | ImageContext->ImageRead = PeiImageRead;\r |
97 | return EFI_SUCCESS;\r |
98 | }\r |
99 | \r |
100 | //\r |
101 | // BugBug; This code assumes PeiImageRead() is less than a page in size!\r |
102 | // Allocate a page so we can shaddow the read function from FLASH into \r |
103 | // memory to increase performance. \r |
104 | //\r |
105 | \r |
106 | MemoryBuffer = AllocateCopyPool (0x400, (VOID *)(UINTN) PeiImageRead);\r |
107 | ASSERT (MemoryBuffer != NULL);\r |
108 | \r |
109 | ImageContext->ImageRead = (PE_COFF_LOADER_READ_FILE) (UINTN) MemoryBuffer;\r |
110 | \r |
111 | return EFI_SUCCESS;\r |
112 | }\r |