1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/** @file
Firmware volume helper interfaces.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2021, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "StandaloneMmCore.h"
#include <Library/FvLib.h>
#include <Library/ExtractGuidedSectionLib.h>
//
// List of file types supported by dispatcher
//
EFI_FV_FILETYPE mMmFileTypes[] = {
EFI_FV_FILETYPE_MM,
0xE, // EFI_FV_FILETYPE_MM_STANDALONE,
//
// Note: DXE core will process the FV image file, so skip it in MM core
// EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE
//
};
EFI_STATUS
MmAddToDriverList (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader,
IN VOID *Pe32Data,
IN UINTN Pe32DataSize,
IN VOID *Depex,
IN UINTN DepexSize,
IN EFI_GUID *DriverName
);
BOOLEAN
FvHasBeenProcessed (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader
);
VOID
FvIsBeingProcessed (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader
);
/**
Given the pointer to the Firmware Volume Header find the
MM driver and return its PE32 image.
@param [in] FwVolHeader Pointer to memory mapped FV
@param [in] Depth Nesting depth of encapsulation sections. Callers
different from MmCoreFfsFindMmDriver() are
responsible for passing in a zero Depth.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_NOT_FOUND Could not find section data.
@retval EFI_OUT_OF_RESOURCES Out of resources.
@retval EFI_VOLUME_CORRUPTED Firmware volume is corrupted.
@retval EFI_UNSUPPORTED Operation not supported.
@retval EFI_ABORTED Recursion aborted because Depth has been
greater than or equal to
PcdFwVolMmMaxEncapsulationDepth.
**/
EFI_STATUS
MmCoreFfsFindMmDriver (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader,
IN UINT32 Depth
)
{
EFI_STATUS Status;
EFI_STATUS DepexStatus;
EFI_FFS_FILE_HEADER *FileHeader;
EFI_FV_FILETYPE FileType;
VOID *Pe32Data;
UINTN Pe32DataSize;
VOID *Depex;
UINTN DepexSize;
UINTN Index;
EFI_COMMON_SECTION_HEADER *Section;
UINT32 DstBufferSize;
VOID *ScratchBuffer;
UINT32 ScratchBufferSize;
VOID *AllocatedDstBuffer;
VOID *DstBuffer;
UINT16 SectionAttribute;
UINT32 AuthenticationStatus;
EFI_FIRMWARE_VOLUME_HEADER *InnerFvHeader;
DEBUG ((DEBUG_INFO, "MmCoreFfsFindMmDriver - 0x%x\n", FwVolHeader));
if (Depth >= PcdGet32 (PcdFwVolMmMaxEncapsulationDepth)) {
DEBUG ((DEBUG_ERROR, "%a: recursion aborted due to nesting depth\n", __func__));
return EFI_ABORTED;
}
if (FvHasBeenProcessed (FwVolHeader)) {
return EFI_SUCCESS;
}
FvIsBeingProcessed (FwVolHeader);
//
// First check for encapsulated compressed firmware volumes
//
FileHeader = NULL;
do {
Status = FfsFindNextFile (
EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE,
FwVolHeader,
&FileHeader
);
if (EFI_ERROR (Status)) {
break;
}
Status = FfsFindSection (
EFI_SECTION_GUID_DEFINED,
FileHeader,
&Section
);
if (EFI_ERROR (Status)) {
break;
}
Status = ExtractGuidedSectionGetInfo (
Section,
&DstBufferSize,
&ScratchBufferSize,
&SectionAttribute
);
if (EFI_ERROR (Status)) {
break;
}
//
// Allocate scratch buffer
//
ScratchBuffer = (VOID *)(UINTN)AllocatePages (EFI_SIZE_TO_PAGES (ScratchBufferSize));
if (ScratchBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Allocate destination buffer, extra one page for adjustment
//
AllocatedDstBuffer = (VOID *)(UINTN)AllocatePages (EFI_SIZE_TO_PAGES (DstBufferSize));
if (AllocatedDstBuffer == NULL) {
FreePages (ScratchBuffer, EFI_SIZE_TO_PAGES (ScratchBufferSize));
return EFI_OUT_OF_RESOURCES;
}
//
// Call decompress function
//
DstBuffer = AllocatedDstBuffer;
Status = ExtractGuidedSectionDecode (
Section,
&DstBuffer,
ScratchBuffer,
&AuthenticationStatus
);
FreePages (ScratchBuffer, EFI_SIZE_TO_PAGES (ScratchBufferSize));
if (EFI_ERROR (Status)) {
goto FreeDstBuffer;
}
//
// Free allocated DstBuffer if it is not used
//
if (DstBuffer != AllocatedDstBuffer) {
FreePages (AllocatedDstBuffer, EFI_SIZE_TO_PAGES (DstBufferSize));
AllocatedDstBuffer = NULL;
}
DEBUG ((
DEBUG_INFO,
"Processing compressed firmware volume (AuthenticationStatus == %x)\n",
AuthenticationStatus
));
Status = FindFfsSectionInSections (
DstBuffer,
DstBufferSize,
EFI_SECTION_FIRMWARE_VOLUME_IMAGE,
&Section
);
if (EFI_ERROR (Status)) {
goto FreeDstBuffer;
}
if (IS_SECTION2 (Section)) {
InnerFvHeader = (VOID *)((EFI_COMMON_SECTION_HEADER2 *)Section + 1);
} else {
InnerFvHeader = (VOID *)(Section + 1);
}
Status = MmCoreFfsFindMmDriver (InnerFvHeader, Depth + 1);
if (EFI_ERROR (Status)) {
goto FreeDstBuffer;
}
} while (TRUE);
for (Index = 0; Index < sizeof (mMmFileTypes) / sizeof (mMmFileTypes[0]); Index++) {
DEBUG ((DEBUG_INFO, "Check MmFileTypes - 0x%x\n", mMmFileTypes[Index]));
FileType = mMmFileTypes[Index];
FileHeader = NULL;
do {
Status = FfsFindNextFile (FileType, FwVolHeader, &FileHeader);
if (!EFI_ERROR (Status)) {
Status = FfsFindSectionData (EFI_SECTION_PE32, FileHeader, &Pe32Data, &Pe32DataSize);
DEBUG ((DEBUG_INFO, "Find PE data - 0x%x\n", Pe32Data));
DepexStatus = FfsFindSectionData (EFI_SECTION_MM_DEPEX, FileHeader, &Depex, &DepexSize);
if (!EFI_ERROR (DepexStatus)) {
MmAddToDriverList (FwVolHeader, Pe32Data, Pe32DataSize, Depex, DepexSize, &FileHeader->Name);
}
}
} while (!EFI_ERROR (Status));
}
return EFI_SUCCESS;
FreeDstBuffer:
if (AllocatedDstBuffer != NULL) {
FreePages (AllocatedDstBuffer, EFI_SIZE_TO_PAGES (DstBufferSize));
}
return Status;
}
|
