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/** @file
Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "AndroidFastbootApp.h"
// Find the kernel and ramdisk in an Android boot.img.
// return EFI_INVALID_PARAMETER if the boot.img is invalid (i.e. doesn't have the
// right magic value),
// return EFI_NOT_FOUND if there was no kernel in the boot.img.
// Note that the Ramdisk is optional - *Ramdisk won't be touched if it isn't
// present, but RamdiskSize will be set to 0.
EFI_STATUS
ParseAndroidBootImg (
IN VOID *BootImg,
OUT VOID **Kernel,
OUT UINTN *KernelSize,
OUT VOID **Ramdisk,
OUT UINTN *RamdiskSize,
OUT CHAR8 *KernelArgs
)
{
ANDROID_BOOTIMG_HEADER *Header;
UINT8 *BootImgBytePtr;
// Cast to UINT8 so we can do pointer arithmetic
BootImgBytePtr = (UINT8 *)BootImg;
Header = (ANDROID_BOOTIMG_HEADER *)BootImg;
if (AsciiStrnCmp (
(CONST CHAR8 *)Header->BootMagic,
ANDROID_BOOT_MAGIC,
ANDROID_BOOT_MAGIC_LENGTH
) != 0)
{
return EFI_INVALID_PARAMETER;
}
if (Header->KernelSize == 0) {
return EFI_NOT_FOUND;
}
ASSERT (IS_VALID_ANDROID_PAGE_SIZE (Header->PageSize));
*KernelSize = Header->KernelSize;
*Kernel = BootImgBytePtr + Header->PageSize;
*RamdiskSize = Header->RamdiskSize;
if (Header->RamdiskSize != 0) {
*Ramdisk = (VOID *)(BootImgBytePtr
+ Header->PageSize
+ ALIGN_VALUE (Header->KernelSize, Header->PageSize));
}
AsciiStrnCpyS (
KernelArgs,
ANDROID_BOOTIMG_KERNEL_ARGS_SIZE,
Header->KernelArgs,
ANDROID_BOOTIMG_KERNEL_ARGS_SIZE
);
return EFI_SUCCESS;
}
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