EmbeddedPkg/AndroidFastboot: eliminate deprecated string function calls
[mirror_edk2.git] / EmbeddedPkg / Application / AndroidFastboot / AndroidBootImg.c
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1/** @file\r
2\r
3 Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>\r
4\r
5 This program and the accompanying materials\r
6 are licensed and made available under the terms and conditions of the BSD License\r
7 which accompanies this distribution. The full text of the license may be found at\r
8 http://opensource.org/licenses/bsd-license.php\r
9\r
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
12\r
13**/\r
14\r
15#include "AndroidFastbootApp.h"\r
16\r
17#define BOOT_MAGIC "ANDROID!"\r
18#define BOOT_MAGIC_LENGTH sizeof (BOOT_MAGIC) - 1\r
19\r
20// Check Val (unsigned) is a power of 2 (has only one bit set)\r
21#define IS_POWER_OF_2(Val) (Val != 0 && ((Val & (Val - 1)) == 0))\r
22\r
23// No documentation for this really - sizes of fields has been determined\r
24// empirically.\r
25#pragma pack(1)\r
26typedef struct {\r
27 CHAR8 BootMagic[BOOT_MAGIC_LENGTH];\r
28 UINT32 KernelSize;\r
29 UINT32 KernelAddress;\r
30 UINT32 RamdiskSize;\r
31 UINT32 RamdiskAddress;\r
32 UINT32 SecondStageBootloaderSize;\r
33 UINT32 SecondStageBootloaderAddress;\r
34 UINT32 KernelTaggsAddress;\r
35 UINT32 PageSize;\r
36 UINT32 Reserved[2];\r
37 CHAR8 ProductName[16];\r
38 CHAR8 KernelArgs[BOOTIMG_KERNEL_ARGS_SIZE];\r
39 UINT32 Id[32];\r
40} ANDROID_BOOTIMG_HEADER;\r
41#pragma pack()\r
42\r
43// Find the kernel and ramdisk in an Android boot.img.\r
44// return EFI_INVALID_PARAMTER if the boot.img is invalid (i.e. doesn't have the\r
45// right magic value),\r
46// return EFI_NOT_FOUND if there was no kernel in the boot.img.\r
47// Note that the Ramdisk is optional - *Ramdisk won't be touched if it isn't\r
48// present, but RamdiskSize will be set to 0.\r
49EFI_STATUS\r
50ParseAndroidBootImg (\r
51 IN VOID *BootImg,\r
52 OUT VOID **Kernel,\r
53 OUT UINTN *KernelSize,\r
54 OUT VOID **Ramdisk,\r
55 OUT UINTN *RamdiskSize,\r
56 OUT CHAR8 *KernelArgs\r
57 )\r
58{\r
59 ANDROID_BOOTIMG_HEADER *Header;\r
60 UINT8 *BootImgBytePtr;\r
61\r
62 // Cast to UINT8 so we can do pointer arithmetic\r
63 BootImgBytePtr = (UINT8 *) BootImg;\r
64\r
65 Header = (ANDROID_BOOTIMG_HEADER *) BootImg;\r
66\r
67 if (AsciiStrnCmp (Header->BootMagic, BOOT_MAGIC, BOOT_MAGIC_LENGTH) != 0) {\r
68 return EFI_INVALID_PARAMETER;\r
69 }\r
70\r
71 if (Header->KernelSize == 0) {\r
72 return EFI_NOT_FOUND;\r
73 }\r
74\r
75 ASSERT (IS_POWER_OF_2 (Header->PageSize));\r
76\r
77 *KernelSize = Header->KernelSize;\r
78 *Kernel = BootImgBytePtr + Header->PageSize;\r
79 *RamdiskSize = Header->RamdiskSize;\r
80\r
81 if (Header->RamdiskSize != 0) {\r
82 *Ramdisk = (VOID *) (BootImgBytePtr\r
83 + Header->PageSize\r
84 + ALIGN_VALUE (Header->KernelSize, Header->PageSize));\r
85 }\r
86\r
31090876
AB
87 AsciiStrnCpyS (KernelArgs, BOOTIMG_KERNEL_ARGS_SIZE, Header->KernelArgs,\r
88 BOOTIMG_KERNEL_ARGS_SIZE);\r
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89\r
90 return EFI_SUCCESS;\r
91}\r