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Support for _FDC and Fsys NVRAM formats

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- only one format remains - EVSA
- added scope to text search UI, because of NVRAM variables having texts
in headers
This commit is contained in:
Nikolaj Schlej 2016-04-05 00:47:34 +02:00
parent d648ce133e
commit 40200bca12
13 changed files with 426 additions and 76 deletions
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24
common/nvram.h
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@ -99,10 +99,9 @@ typedef struct _VSS_VARIABLE_STORE_HEADER {
// Apple Fsys store header
typedef struct _APPLE_FSYS_STORE_HEADER {
UINT32 Signature; // Fsys signature
UINT8 Unknown; // Still unknown
UINT32 Unknown2; // Still unknown
UINT16 Size; // Size of variable storage
UINT32 Signature; // Fsys signature
UINT8 Unknown[5]; // Still unknown
UINT16 Size; // Size of variable storage
} APPLE_FSYS_STORE_HEADER;
// Apple Fsys variable format
@ -110,8 +109,8 @@ typedef struct _APPLE_FSYS_STORE_HEADER {
// CHAR8 Name[];
// UINT16 DataLength;
// UINT8 Data[]
// End with a chunk named "EOF" without data
// All free bytes are zeros
// Storage ends with a chunk named "EOF" without data
// All free bytes in storage are zeroed
// Has CRC32 of the whole store without checksum field at the end
// Normal variable header
@ -168,6 +167,19 @@ typedef struct _VSS_AUTH_VARIABLE_HEADER {
#define NVRAM_VSS_VARIABLE_APPEND_WRITE 0x00000040
#define NVRAM_VSS_VARIABLE_APPLE_DATA_CHECKSUM 0x80000000
// FDC region can be found in some VSS volumes
// It has another VSS volume inside
// _FDC header structure
typedef struct _FDC_VOLUME_HEADER {
UINT32 Signature;
UINT32 Size;
//EFI_FIRMWARE_VOLUME_HEADER VolumeHeader;
//EFI_FV_BLOCK_MAP_ENTRY FvBlockMap[2];
//VSS_VARIABLE_STORE_HEADER VssHeader;
} FDC_VOLUME_HEADER;
#define NVRAM_FDC_VOLUME_SIGNATURE 0x4344465F
// Restore previous packing rules
#pragma pack(pop)