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audk/EdkCompatibilityPkg/Sample/Tools/Source/BootsectImage/bootsectimage.c

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/*++
Copyright 2006 - 2007, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
bootsectimage.c
Abstract:
Patch the BPB information in boot sector image file.
Patch the MBR code in MBR image file.
--*/
#include <windows.h>
#include <stdio.h>
#include "fat.h"
#include "mbr.h"
#include "EfiUtilityMsgs.h"
#define DEBUG_WARN 0x1
#define DEBUG_ERROR 0x2
int WriteToFile (
void *BootSector,
char *FileName
)
/*++
Routine Description:
Write 512 bytes boot sector to file.
Arguments:
BootSector - point to a buffer containing 512 bytes boot sector to write
FileName - file to write to
Return:
int - number of bytes wrote,
512 indicates write successful
0 indicates write failure
--*/
{
FILE *FileHandle;
int result;
FileHandle = fopen (FileName, "r+b");
if (FileHandle == NULL) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "Open file: %s", FileName);
return 0;
}
fseek (FileHandle, 0, SEEK_SET);
result = fwrite (BootSector, 1, 512, FileHandle);
if (result != 512) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "Write file: %s", FileName);
result = 0;
}
fclose (FileHandle);
return result;
}
int ReadFromFile (
void *BootSector,
char *FileName
)
/*++
Routine Description:
Read first 512 bytes from file.
Arguments:
BootSector - point to a buffer receiving the first 512 bytes data from file
FileName - file to read from
Return:
int - number of bytes read,
512 indicates read successful
0 indicates read failure
--*/
{
FILE *FileHandle;
int result;
FileHandle = fopen (FileName, "rb");
if (FileHandle == NULL) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "Open file: %s", FileName);
return 0;
}
result = fread (BootSector, 1, 512, FileHandle);
if (result != 512) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "Read file: %s", FileName);
result = 0;
}
fclose (FileHandle);
return result;
}
char *
FatTypeToString (
IN FAT_TYPE FatType
)
/*++
Routine Description:
Convert enum type of FatType to string
--*/
{
switch (FatType) {
case FatTypeFat12:
return "FAT12";
case FatTypeFat16:
return "FAT16";
case FatTypeFat32:
return "FAT32";
default:
break;
}
return "FAT Unknown";
}
FAT_TYPE
GetFatType (
IN FAT_BPB_STRUCT *FatBpb
)
/*++
Routine Description:
Determine the FAT type according to BIOS Paramater Block (BPB) data
Arguments:
FatBpb - BIOS Parameter Block (BPB) data, 512 Bytes
Return:
FatTypeUnknown - Cannot determine the FAT type
FatTypeFat12 - FAT12
FatTypeFat16 - FAT16
FatTypeFat32 - FAT32
--*/
{
FAT_TYPE FatType;
UINTN RootDirSectors;
UINTN FATSz;
UINTN TotSec;
UINTN DataSec;
UINTN CountOfClusters;
CHAR8 FilSysType[9];
FatType = FatTypeUnknown;
//
// Simple check
//
if (FatBpb->Fat12_16.Signature != FAT_BS_SIGNATURE) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: Signature Invalid - %04x, expected - %04x",
FatBpb->Fat12_16.Signature, FAT_BS_SIGNATURE);
return FatTypeUnknown;
}
//
// Check according to FAT spec
//
if ((FatBpb->Fat12_16.BS_jmpBoot[0] != FAT_BS_JMP1) &&
(FatBpb->Fat12_16.BS_jmpBoot[0] != FAT_BS_JMP2)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: BS_jmpBoot - %02x, expected - %02x or %02x",
FatBpb->Fat12_16.BS_jmpBoot[0], FAT_BS_JMP1, FAT_BS_JMP2);
return FatTypeUnknown;
}
if ((FatBpb->Fat12_16.BPB_BytsPerSec != 512) &&
(FatBpb->Fat12_16.BPB_BytsPerSec != 1024) &&
(FatBpb->Fat12_16.BPB_BytsPerSec != 2048) &&
(FatBpb->Fat12_16.BPB_BytsPerSec != 4096)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: BPB_BytsPerSec - %04x, expected - %04x, %04x, %04x, or %04x",
FatBpb->Fat12_16.BPB_BytsPerSec, 512, 1024, 2048, 4096);
return FatTypeUnknown;
}
if (FatBpb->Fat12_16.BPB_BytsPerSec != 512) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT: BPB_BytsPerSec - %04x, expected - %04x",
FatBpb->Fat12_16.BPB_BytsPerSec, 512);
}
if ((FatBpb->Fat12_16.BPB_SecPerClus != 1) &&
(FatBpb->Fat12_16.BPB_SecPerClus != 2) &&
(FatBpb->Fat12_16.BPB_SecPerClus != 4) &&
(FatBpb->Fat12_16.BPB_SecPerClus != 8) &&
(FatBpb->Fat12_16.BPB_SecPerClus != 16) &&
(FatBpb->Fat12_16.BPB_SecPerClus != 32) &&
(FatBpb->Fat12_16.BPB_SecPerClus != 64) &&
(FatBpb->Fat12_16.BPB_SecPerClus != 128)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: BPB_SecPerClus - %02x, expected - %02x, %02x, %02x, %02x, %02x, %02x, %02x, or %02x",
FatBpb->Fat12_16.BPB_BytsPerSec, 1, 2, 4, 8, 16, 32, 64, 128);
return FatTypeUnknown;
}
if (FatBpb->Fat12_16.BPB_BytsPerSec * FatBpb->Fat12_16.BPB_SecPerClus > 32 * 1024) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: BPB_BytsPerSec * BPB_SecPerClus - %08x, expected <= %08x",
FatBpb->Fat12_16.BPB_BytsPerSec * FatBpb->Fat12_16.BPB_SecPerClus, 32 * 1024);
return FatTypeUnknown;
}
if (FatBpb->Fat12_16.BPB_RsvdSecCnt == 0) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: BPB_RsvdSecCnt - %04x, expected - Non-Zero",
FatBpb->Fat12_16.BPB_RsvdSecCnt);
return FatTypeUnknown;
}
if (FatBpb->Fat12_16.BPB_NumFATs != 2) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT: BPB_NumFATs - %02x, expected - %02x",
FatBpb->Fat12_16.BPB_NumFATs, 2);
}
if ((FatBpb->Fat12_16.BPB_Media != 0xF0) &&
(FatBpb->Fat12_16.BPB_Media != 0xF8) &&
(FatBpb->Fat12_16.BPB_Media != 0xF9) &&
(FatBpb->Fat12_16.BPB_Media != 0xFA) &&
(FatBpb->Fat12_16.BPB_Media != 0xFB) &&
(FatBpb->Fat12_16.BPB_Media != 0xFC) &&
(FatBpb->Fat12_16.BPB_Media != 0xFD) &&
(FatBpb->Fat12_16.BPB_Media != 0xFE) &&
(FatBpb->Fat12_16.BPB_Media != 0xFF)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: BPB_Media - %02x, expected - %02x, %02x, %02x, %02x, %02x, %02x, %02x, %02x, or %02x",
FatBpb->Fat12_16.BPB_Media, 0xF0, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF);
return FatTypeUnknown;
}
//
// Algo in FAT spec
//
RootDirSectors = ((FatBpb->Fat12_16.BPB_RootEntCnt * sizeof(FAT_DIRECTORY_ENTRY)) +
(FatBpb->Fat12_16.BPB_BytsPerSec - 1)) /
FatBpb->Fat12_16.BPB_BytsPerSec;
if (FatBpb->Fat12_16.BPB_FATSz16 != 0) {
FATSz = FatBpb->Fat12_16.BPB_FATSz16;
} else {
FATSz = FatBpb->Fat32.BPB_FATSz32;
}
if (FATSz == 0) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: BPB_FATSz16, BPB_FATSz32 - 0, expected - Non-Zero");
return FatTypeUnknown;
}
if (FatBpb->Fat12_16.BPB_TotSec16 != 0) {
TotSec = FatBpb->Fat12_16.BPB_TotSec16;
} else {
TotSec = FatBpb->Fat12_16.BPB_TotSec32;
}
if (TotSec == 0) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT: BPB_TotSec16, BPB_TotSec32 - 0, expected - Non-Zero");
return FatTypeUnknown;
}
DataSec = TotSec - (
FatBpb->Fat12_16.BPB_RsvdSecCnt +
FatBpb->Fat12_16.BPB_NumFATs * FATSz +
RootDirSectors
);
CountOfClusters = DataSec / FatBpb->Fat12_16.BPB_SecPerClus;
if (CountOfClusters < FAT_MAX_FAT12_CLUSTER) {
FatType = FatTypeFat12;
} else if (CountOfClusters < FAT_MAX_FAT16_CLUSTER) {
FatType = FatTypeFat16;
} else {
FatType = FatTypeFat32;
}
//
// Check according to FAT spec
//
if (((FatType == FatTypeFat12) || (FatType == FatTypeFat16)) &&
(FatBpb->Fat12_16.BPB_RsvdSecCnt != 1)) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT12_16: BPB_RsvdSecCnt - %04x, expected - %04x",
FatBpb->Fat12_16.BPB_RsvdSecCnt, 1);
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat12_16.BPB_RsvdSecCnt != 32)) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT32: BPB_RsvdSecCnt - %04x, expected - %04x",
FatBpb->Fat12_16.BPB_RsvdSecCnt, 32);
}
if ((FatType == FatTypeFat16) &&
(FatBpb->Fat12_16.BPB_RootEntCnt != 512)) {
printf ("WARNING: FAT16: BPB_RootEntCnt - %04x, expected - %04x\n",
FatBpb->Fat12_16.BPB_RootEntCnt, 512);
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat12_16.BPB_RootEntCnt != 0)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT32: BPB_RootEntCnt - %04x, expected - %04x",
FatBpb->Fat12_16.BPB_RootEntCnt, 0);
return FatTypeUnknown;
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat12_16.BPB_TotSec16 != 0)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT32: BPB_TotSec16 - %04x, expected - %04x",
FatBpb->Fat12_16.BPB_TotSec16, 0);
return FatTypeUnknown;
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat12_16.BPB_FATSz16 != 0)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT32: BPB_FATSz16 - %04x, expected - %04x",
FatBpb->Fat12_16.BPB_FATSz16, 0);
return FatTypeUnknown;
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat12_16.BPB_TotSec32 == 0)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT32: BPB_TotSec32 - %04x, expected - Non-Zero",
FatBpb->Fat12_16.BPB_TotSec32);
return FatTypeUnknown;
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat32.BPB_FATSz32 == 0)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT32: BPB_FATSz32 - %08x, expected - Non-Zero",
FatBpb->Fat32.BPB_FATSz32);
return FatTypeUnknown;
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat32.BPB_FSVer != 0)) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT32: BPB_FSVer - %08x, expected - %04x",
FatBpb->Fat32.BPB_FSVer, 0);
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat32.BPB_RootClus != 2)) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT32: BPB_RootClus - %08x, expected - %04x",
FatBpb->Fat32.BPB_RootClus, 2);
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat32.BPB_FSInfo != 1)) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT32: BPB_FSInfo - %08x, expected - %04x",
FatBpb->Fat32.BPB_FSInfo, 1);
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat32.BPB_BkBootSec != 6)) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT32: BPB_BkBootSec - %08x, expected - %04x",
FatBpb->Fat32.BPB_BkBootSec, 6);
}
if ((FatType == FatTypeFat32) &&
((*(UINT32 *)FatBpb->Fat32.BPB_Reserved != 0) ||
(*((UINT32 *)FatBpb->Fat32.BPB_Reserved + 1) != 0) ||
(*((UINT32 *)FatBpb->Fat32.BPB_Reserved + 2) != 0))) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT32: BPB_Reserved - %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x, expected - 0",
FatBpb->Fat32.BPB_Reserved[0],
FatBpb->Fat32.BPB_Reserved[1],
FatBpb->Fat32.BPB_Reserved[2],
FatBpb->Fat32.BPB_Reserved[3],
FatBpb->Fat32.BPB_Reserved[4],
FatBpb->Fat32.BPB_Reserved[5],
FatBpb->Fat32.BPB_Reserved[6],
FatBpb->Fat32.BPB_Reserved[7],
FatBpb->Fat32.BPB_Reserved[8],
FatBpb->Fat32.BPB_Reserved[9],
FatBpb->Fat32.BPB_Reserved[10],
FatBpb->Fat32.BPB_Reserved[11]);
return FatTypeUnknown;
}
if (((FatType == FatTypeFat12) || (FatType == FatTypeFat16)) &&
(FatBpb->Fat12_16.BS_Reserved1 != 0)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT12_16: BS_Reserved1 - %02x, expected - 0\n",
FatBpb->Fat12_16.BS_Reserved1);
return FatTypeUnknown;
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat32.BS_Reserved1 != 0)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT32: BS_Reserved1 - %02x, expected - 0\n",
FatBpb->Fat32.BS_Reserved1);
return FatTypeUnknown;
}
if (((FatType == FatTypeFat12) || (FatType == FatTypeFat16)) &&
(FatBpb->Fat12_16.BS_BootSig != FAT_BS_BOOTSIG)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT12_16: BS_BootSig - %02x, expected - %02x\n",
FatBpb->Fat12_16.BS_BootSig, FAT_BS_BOOTSIG);
return FatTypeUnknown;
}
if ((FatType == FatTypeFat32) &&
(FatBpb->Fat32.BS_BootSig != FAT_BS_BOOTSIG)) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT32: BS_BootSig - %02x, expected - %02x\n",
FatBpb->Fat32.BS_BootSig, FAT_BS_BOOTSIG);
return FatTypeUnknown;
}
if ((FatType == FatTypeFat12) || (FatType == FatTypeFat16)) {
memcpy (FilSysType, FatBpb->Fat12_16.BS_FilSysType, 8);
FilSysType[8] = 0;
if ((FatType == FatTypeFat12) &&
(strcmp (FilSysType, FAT12_FILSYSTYPE) != 0) &&
(strcmp (FilSysType, FAT_FILSYSTYPE) != 0)) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT12: BS_FilSysType - %s, expected - %s, or %s\n",
FilSysType, FAT12_FILSYSTYPE, FAT_FILSYSTYPE);
}
if ((FatType == FatTypeFat16) &&
(strcmp (FilSysType, FAT16_FILSYSTYPE) != 0) &&
(strcmp (FilSysType, FAT_FILSYSTYPE) != 0)) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT16: BS_FilSysType - %s, expected - %s, or %s\n",
FilSysType, FAT16_FILSYSTYPE, FAT_FILSYSTYPE);
}
}
if (FatType == FatTypeFat32) {
memcpy (FilSysType, FatBpb->Fat32.BS_FilSysType, 8);
FilSysType[8] = 0;
if (strcmp (FilSysType, FAT32_FILSYSTYPE) != 0) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT32: BS_FilSysType - %s, expected - %s\n",
FilSysType, FAT32_FILSYSTYPE);
}
}
//
// pass all check, get FAT type
//
return FatType;
}
void
ParseBootSector (
char *FileName
)
{
FAT_BPB_STRUCT FatBpb;
FAT_TYPE FatType;
if (ReadFromFile ((void *)&FatBpb, FileName) == 0) {
return ;
}
FatType = GetFatType (&FatBpb);
if (FatType <= FatTypeUnknown || FatType >= FatTypeMax) {
printf ("ERROR: Unknown Fat Type!\n");
return;
}
printf ("\nBoot Sector %s:\n", FatTypeToString (FatType));
printf ("\n");
printf (" Offset Title Data\n");
printf ("==================================================================\n");
printf (" 0 JMP instruction %02x %02x %02x\n",
FatBpb.Fat12_16.BS_jmpBoot[0],
FatBpb.Fat12_16.BS_jmpBoot[1],
FatBpb.Fat12_16.BS_jmpBoot[2]);
printf (" 3 OEM %c%c%c%c%c%c%c%c\n",
FatBpb.Fat12_16.BS_OEMName[0],
FatBpb.Fat12_16.BS_OEMName[1],
FatBpb.Fat12_16.BS_OEMName[2],
FatBpb.Fat12_16.BS_OEMName[3],
FatBpb.Fat12_16.BS_OEMName[4],
FatBpb.Fat12_16.BS_OEMName[5],
FatBpb.Fat12_16.BS_OEMName[6],
FatBpb.Fat12_16.BS_OEMName[7]);
printf ("\n");
printf ("BIOS Parameter Block\n");
printf (" B Bytes per sector %04x\n", FatBpb.Fat12_16.BPB_BytsPerSec);
printf (" D Sectors per cluster %02x\n", FatBpb.Fat12_16.BPB_SecPerClus);
printf (" E Reserved sectors %04x\n", FatBpb.Fat12_16.BPB_RsvdSecCnt);
printf (" 10 Number of FATs %02x\n", FatBpb.Fat12_16.BPB_NumFATs);
printf (" 11 Root entries %04x\n", FatBpb.Fat12_16.BPB_RootEntCnt);
printf (" 13 Sectors (under 32MB) %04x\n", FatBpb.Fat12_16.BPB_TotSec16);
printf (" 15 Media descriptor %02x\n", FatBpb.Fat12_16.BPB_Media);
printf (" 16 Sectors per FAT (small vol.) %04x\n", FatBpb.Fat12_16.BPB_FATSz16);
printf (" 18 Sectors per track %04x\n", FatBpb.Fat12_16.BPB_SecPerTrk);
printf (" 1A Heads %04x\n", FatBpb.Fat12_16.BPB_NumHeads);
printf (" 1C Hidden sectors %08x\n", FatBpb.Fat12_16.BPB_HiddSec);
printf (" 20 Sectors (over 32MB) %08x\n", FatBpb.Fat12_16.BPB_TotSec32);
printf ("\n");
if (FatType != FatTypeFat32) {
printf (" 24 BIOS drive %02x\n", FatBpb.Fat12_16.BS_DrvNum);
printf (" 25 (Unused) %02x\n", FatBpb.Fat12_16.BS_Reserved1);
printf (" 26 Ext. boot signature %02x\n", FatBpb.Fat12_16.BS_BootSig);
printf (" 27 Volume serial number %08x\n", FatBpb.Fat12_16.BS_VolID);
printf (" 2B Volume lable %c%c%c%c%c%c%c%c%c%c%c\n",
FatBpb.Fat12_16.BS_VolLab[0],
FatBpb.Fat12_16.BS_VolLab[1],
FatBpb.Fat12_16.BS_VolLab[2],
FatBpb.Fat12_16.BS_VolLab[3],
FatBpb.Fat12_16.BS_VolLab[4],
FatBpb.Fat12_16.BS_VolLab[5],
FatBpb.Fat12_16.BS_VolLab[6],
FatBpb.Fat12_16.BS_VolLab[7],
FatBpb.Fat12_16.BS_VolLab[8],
FatBpb.Fat12_16.BS_VolLab[9],
FatBpb.Fat12_16.BS_VolLab[10]);
printf (" 36 File system %c%c%c%c%c%c%c%c\n",
FatBpb.Fat12_16.BS_FilSysType[0],
FatBpb.Fat12_16.BS_FilSysType[1],
FatBpb.Fat12_16.BS_FilSysType[2],
FatBpb.Fat12_16.BS_FilSysType[3],
FatBpb.Fat12_16.BS_FilSysType[4],
FatBpb.Fat12_16.BS_FilSysType[5],
FatBpb.Fat12_16.BS_FilSysType[6],
FatBpb.Fat12_16.BS_FilSysType[7]);
printf ("\n");
} else {
printf ("FAT32 Section\n");
printf (" 24 Sectors per FAT (large vol.) %08x\n", FatBpb.Fat32.BPB_FATSz32);
printf (" 28 Flags %04x\n", FatBpb.Fat32.BPB_ExtFlags);
printf (" 2A Version %04x\n", FatBpb.Fat32.BPB_FSVer);
printf (" 2C Root dir 1st cluster %08x\n", FatBpb.Fat32.BPB_RootClus);
printf (" 30 FSInfo sector %04x\n", FatBpb.Fat32.BPB_FSInfo);
printf (" 32 Backup boot sector %04x\n", FatBpb.Fat32.BPB_BkBootSec);
printf (" 34 (Reserved) %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
FatBpb.Fat32.BPB_Reserved[0],
FatBpb.Fat32.BPB_Reserved[1],
FatBpb.Fat32.BPB_Reserved[2],
FatBpb.Fat32.BPB_Reserved[3],
FatBpb.Fat32.BPB_Reserved[4],
FatBpb.Fat32.BPB_Reserved[5],
FatBpb.Fat32.BPB_Reserved[6],
FatBpb.Fat32.BPB_Reserved[7],
FatBpb.Fat32.BPB_Reserved[8],
FatBpb.Fat32.BPB_Reserved[9],
FatBpb.Fat32.BPB_Reserved[10],
FatBpb.Fat32.BPB_Reserved[11]);
printf ("\n");
printf (" 40 BIOS drive %02x\n", FatBpb.Fat32.BS_DrvNum);
printf (" 41 (Unused) %02x\n", FatBpb.Fat32.BS_Reserved1);
printf (" 42 Ext. boot signature %02x\n", FatBpb.Fat32.BS_BootSig);
printf (" 43 Volume serial number %08x\n", FatBpb.Fat32.BS_VolID);
printf (" 47 Volume lable %c%c%c%c%c%c%c%c%c%c%c\n",
FatBpb.Fat32.BS_VolLab[0],
FatBpb.Fat32.BS_VolLab[1],
FatBpb.Fat32.BS_VolLab[2],
FatBpb.Fat32.BS_VolLab[3],
FatBpb.Fat32.BS_VolLab[4],
FatBpb.Fat32.BS_VolLab[5],
FatBpb.Fat32.BS_VolLab[6],
FatBpb.Fat32.BS_VolLab[7],
FatBpb.Fat32.BS_VolLab[8],
FatBpb.Fat32.BS_VolLab[9],
FatBpb.Fat32.BS_VolLab[10]);
printf (" 52 File system %c%c%c%c%c%c%c%c\n",
FatBpb.Fat32.BS_FilSysType[0],
FatBpb.Fat32.BS_FilSysType[1],
FatBpb.Fat32.BS_FilSysType[2],
FatBpb.Fat32.BS_FilSysType[3],
FatBpb.Fat32.BS_FilSysType[4],
FatBpb.Fat32.BS_FilSysType[5],
FatBpb.Fat32.BS_FilSysType[6],
FatBpb.Fat32.BS_FilSysType[7]);
printf ("\n");
}
printf (" 1FE Signature %04x\n", FatBpb.Fat12_16.Signature);
printf ("\n");
return ;
}
void
PatchBootSector (
char *DestFileName,
char *SourceFileName,
BOOL ForcePatch
)
/*++
Routine Description:
Patch destination file according to the information from source file.
Only patch BPB data but leave boot code un-touched.
Arguments:
DestFileName - Destination file to patch
SourceFileName - Source file where patch from
--*/
{
FAT_BPB_STRUCT DestFatBpb;
FAT_BPB_STRUCT SourceFatBpb;
FAT_TYPE DestFatType;
FAT_TYPE SourceFatType;
CHAR8 VolLab[11];
CHAR8 FilSysType[8];
if (ReadFromFile ((void *)&DestFatBpb, DestFileName) == 0) {
return ;
}
if (ReadFromFile ((void *)&SourceFatBpb, SourceFileName) == 0) {
return ;
}
DestFatType = GetFatType (&DestFatBpb);
SourceFatType = GetFatType (&SourceFatBpb);
if (DestFatType != SourceFatType) {
//
// FAT type mismatch
//
if (ForcePatch) {
DebugMsg (NULL, 0, DEBUG_WARN, NULL, "FAT type mismatch: Dest - %s, Source - %s",
FatTypeToString(DestFatType), FatTypeToString(SourceFatType));
} else {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "FAT type mismatch: Dest - %s, Source - %s",
FatTypeToString(DestFatType), FatTypeToString(SourceFatType));
return ;
}
}
if (SourceFatType <= FatTypeUnknown || SourceFatType >= FatTypeMax) {
DebugMsg (NULL, 0, DEBUG_ERROR, NULL, "Unknown Fat Type!\n");
return;
}
//
// Copy BPB/boot data (excluding BS_jmpBoot, BS_OEMName, BootCode and Signature) from SourceFatBpb to DestFatBpb
//
printf ("Patching %s BPB: ", FatTypeToString (SourceFatType));
if (SourceFatType != FatTypeFat32) {
memcpy (
&DestFatBpb.Fat12_16.BPB_BytsPerSec,
&SourceFatBpb.Fat12_16.BPB_BytsPerSec,
((UINTN)&DestFatBpb.Fat12_16.Reserved - (UINTN)&DestFatBpb.Fat12_16.BPB_BytsPerSec)
);
} else {
memcpy (
&DestFatBpb.Fat32.BPB_BytsPerSec,
&SourceFatBpb.Fat32.BPB_BytsPerSec,
((UINTN)&DestFatBpb.Fat32.Reserved - (UINTN)&DestFatBpb.Fat32.BPB_BytsPerSec)
);
}
//
// Set BS_VolLab and BS_FilSysType of DestFatBpb
//
// BS_VolLab BS_FilSysType
// FAT12: EFI FAT12 FAT12
// FAT16: EFI FAT16 FAT16
// FAT32: EFI FAT32 FAT32
//
if (SourceFatType == FatTypeFat32) {
memcpy (VolLab, "EFI FAT32 ", sizeof(VolLab));
memcpy (FilSysType, FAT32_FILSYSTYPE, sizeof(FilSysType));
} else if (SourceFatType == FatTypeFat16) {
memcpy (VolLab, "EFI FAT16 ", sizeof(VolLab));
memcpy (FilSysType, FAT16_FILSYSTYPE, sizeof(FilSysType));
} else {
memcpy (VolLab, "EFI FAT12 ", sizeof(VolLab));
memcpy (FilSysType, FAT12_FILSYSTYPE, sizeof(FilSysType));
}
if (SourceFatType != FatTypeFat32) {
memcpy (DestFatBpb.Fat12_16.BS_VolLab, VolLab, sizeof(VolLab));
memcpy (DestFatBpb.Fat12_16.BS_FilSysType, FilSysType, sizeof(FilSysType));
} else {
memcpy (DestFatBpb.Fat32.BS_VolLab, VolLab, sizeof(VolLab));
memcpy (DestFatBpb.Fat32.BS_FilSysType, FilSysType, sizeof(FilSysType));
}
//
// Set Signature of DestFatBpb to 55AA
//
DestFatBpb.Fat12_16.Signature = FAT_BS_SIGNATURE;
//
// Write DestFatBpb
//
if (WriteToFile ((void *)&DestFatBpb, DestFileName)) {
printf ("successfully!\n");
} else {
printf ("failed!\n");
}
return ;
}
void
ParseMbr (
char *FileName
)
{
MASTER_BOOT_RECORD Mbr;
if (ReadFromFile ((void *)&Mbr, FileName) == 0) {
return ;
}
printf ("\nMaster Boot Record:\n");
printf ("\n");
printf (" Offset Title Value\n");
printf ("==================================================================\n");
printf (" 0 Master bootstrap loader code (not list)\n");
printf (" 1B8 Windows disk signature %08x\n", Mbr.UniqueMbrSignature);
printf ("\n");
printf ("Partition Table Entry #1\n");
printf (" 1BE 80 = active partition %02x\n", Mbr.PartitionRecord[0].BootIndicator);
printf (" 1BF Start head %02x\n", Mbr.PartitionRecord[0].StartHead);
printf (" 1C0 Start sector %02x\n", Mbr.PartitionRecord[0].StartSector);
printf (" 1C1 Start cylinder %02x\n", Mbr.PartitionRecord[0].StartTrack);
printf (" 1C2 Partition type indicator %02x\n", Mbr.PartitionRecord[0].OSType);
printf (" 1C3 End head %02x\n", Mbr.PartitionRecord[0].EndHead);
printf (" 1C4 End sector %02x\n", Mbr.PartitionRecord[0].EndSector);
printf (" 1C5 End cylinder %02x\n", Mbr.PartitionRecord[0].EndTrack);
printf (" 1C6 Sectors preceding partition %08x\n", Mbr.PartitionRecord[0].StartingLBA);
printf (" 1CA Sectors in partition %08x\n", Mbr.PartitionRecord[0].SizeInLBA);
printf ("\n");
printf ("Partition Table Entry #2\n");
printf (" 1CE 80 = active partition %02x\n", Mbr.PartitionRecord[1].BootIndicator);
printf (" 1CF Start head %02x\n", Mbr.PartitionRecord[1].StartHead);
printf (" 1D0 Start sector %02x\n", Mbr.PartitionRecord[1].StartSector);
printf (" 1D1 Start cylinder %02x\n", Mbr.PartitionRecord[1].StartTrack);
printf (" 1D2 Partition type indicator %02x\n", Mbr.PartitionRecord[1].OSType);
printf (" 1D3 End head %02x\n", Mbr.PartitionRecord[1].EndHead);
printf (" 1D4 End sector %02x\n", Mbr.PartitionRecord[1].EndSector);
printf (" 1D5 End cylinder %02x\n", Mbr.PartitionRecord[1].EndTrack);
printf (" 1D6 Sectors preceding partition %08x\n", Mbr.PartitionRecord[1].StartingLBA);
printf (" 1DA Sectors in partition %08x\n", Mbr.PartitionRecord[1].SizeInLBA);
printf ("\n");
printf ("Partition Table Entry #3\n");
printf (" 1DE 80 = active partition %02x\n", Mbr.PartitionRecord[2].BootIndicator);
printf (" 1DF Start head %02x\n", Mbr.PartitionRecord[2].StartHead);
printf (" 1E0 Start sector %02x\n", Mbr.PartitionRecord[2].StartSector);
printf (" 1E1 Start cylinder %02x\n", Mbr.PartitionRecord[2].StartTrack);
printf (" 1E2 Partition type indicator %02x\n", Mbr.PartitionRecord[2].OSType);
printf (" 1E3 End head %02x\n", Mbr.PartitionRecord[2].EndHead);
printf (" 1E4 End sector %02x\n", Mbr.PartitionRecord[2].EndSector);
printf (" 1E5 End cylinder %02x\n", Mbr.PartitionRecord[2].EndTrack);
printf (" 1E6 Sectors preceding partition %08x\n", Mbr.PartitionRecord[2].StartingLBA);
printf (" 1EA Sectors in partition %08x\n", Mbr.PartitionRecord[2].SizeInLBA);
printf ("\n");
printf ("Partition Table Entry #4\n");
printf (" 1EE 80 = active partition %02x\n", Mbr.PartitionRecord[3].BootIndicator);
printf (" 1EF Start head %02x\n", Mbr.PartitionRecord[3].StartHead);
printf (" 1F0 Start sector %02x\n", Mbr.PartitionRecord[3].StartSector);
printf (" 1F1 Start cylinder %02x\n", Mbr.PartitionRecord[3].StartTrack);
printf (" 1F2 Partition type indicator %02x\n", Mbr.PartitionRecord[3].OSType);
printf (" 1F3 End head %02x\n", Mbr.PartitionRecord[3].EndHead);
printf (" 1F4 End sector %02x\n", Mbr.PartitionRecord[3].EndSector);
printf (" 1F5 End cylinder %02x\n", Mbr.PartitionRecord[3].EndTrack);
printf (" 1F6 Sectors preceding partition %08x\n", Mbr.PartitionRecord[3].StartingLBA);
printf (" 1FA Sectors in partition %08x\n", Mbr.PartitionRecord[3].SizeInLBA);
printf ("\n");
printf (" 1FE Signature %04x\n", Mbr.Signature);
printf ("\n");
return ;
}
void
PatchMbr (
char *DestFileName,
char *SourceFileName
)
{
MASTER_BOOT_RECORD DestMbr;
MASTER_BOOT_RECORD SourceMbr;
if (ReadFromFile ((void *)&DestMbr, DestFileName) == 0) {
return ;
}
if (ReadFromFile ((void *)&SourceMbr, SourceFileName) == 0) {
return ;
}
if (SourceMbr.Signature != MBR_SIGNATURE) {
printf ("ERROR: Invalid MBR!\n");
return;
}
printf ("Patching MBR:\n");
memcpy (
&DestMbr.PartitionRecord[0],
&SourceMbr.PartitionRecord[0],
sizeof(DestMbr.PartitionRecord)
);
DestMbr.Signature = MBR_SIGNATURE;
if (WriteToFile ((void *)&DestMbr, DestFileName)) {
printf ("\tsuccessfully!\n");
}
return ;
}
void
PrintUsage (
void
)
{
printf (
"Usage:\n"
"bootsectimage [-m] [-v] -p SrcImage\n"
"bootsectimage [-m] [-v] [-f] -g SrcImage DstImage\n"
"where\n"
" -p: parse SrcImage\n"
" -g: get info from SrcImage, and patch to DstImage\n"
" -f: force patch even FAT type of SrcImage and DstImage mismatch\n"
" -m: process MBR instead of boot sector\n"
" -v: verbose\n"
);
}
int
main (
int argc,
char *argv[]
)
{
char *SrcImage;
char *DstImage;
BOOL ForcePatch; // -f
BOOL ProcessMbr; // -m
BOOL DoParse; // -p SrcImage or -g SrcImage DstImage
BOOL Verbose; // -v
SrcImage = DstImage = NULL;
ForcePatch = FALSE;
ProcessMbr = FALSE;
DoParse = TRUE;
Verbose = FALSE;
SetUtilityName ("bootsectimage");
argc--; argv++;
if (argc == 0) {
PrintUsage ();
return -1;
}
while (argc != 0) {
if (strcmp (*argv, "-f") == 0) {
ForcePatch = TRUE;
} else if (strcmp (*argv, "-p") == 0) {
DoParse = TRUE;
argc--; argv++;
if (argc < 1) {
PrintUsage ();
return -1;
}
SrcImage = *argv;
} else if (strcmp (*argv, "-g") == 0) {
DoParse = FALSE;
argc--; argv++;
if (argc < 2) {
PrintUsage ();
return -1;
}
SrcImage = *argv;
argc--; argv++;
DstImage = *argv;
} else if (strcmp (*argv, "-m") == 0) {
ProcessMbr = TRUE;
} else if (strcmp (*argv, "-v") == 0) {
Verbose = TRUE;
} else {
PrintUsage ();
return -1;
}
argc--; argv++;
}
if (ForcePatch && DoParse) {
printf ("Cannot apply force(-f) to parse(-p)!\n");
PrintUsage ();
return -1;
}
if (ForcePatch && !DoParse && ProcessMbr) {
printf ("Cannot apply force(-f) to processing MBR (-g -m)!\n");
PrintUsage ();
return -1;
}
if (Verbose) {
SetDebugMsgMask (DEBUG_WARN | DEBUG_ERROR);
} else {
SetDebugMsgMask (0);
}
if (DoParse) {
if (ProcessMbr) {
ParseMbr (SrcImage);
} else {
ParseBootSector (SrcImage);
}
} else {
if (ProcessMbr) {
PatchMbr (DstImage, SrcImage);
} else {
PatchBootSector (DstImage, SrcImage, ForcePatch);
}
}
return 0;
}
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