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
|
/*
* Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <image.h>
#include <android_image.h>
#include <malloc.h>
#include <errno.h>
#define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR 0x10008000
static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];
static ulong android_image_get_kernel_addr(const struct andr_img_hdr *hdr)
{
/*
* All the Android tools that generate a boot.img use this
* address as the default.
*
* Even though it doesn't really make a lot of sense, and it
* might be valid on some platforms, we treat that adress as
* the default value for this field, and try to execute the
* kernel in place in such a case.
*
* Otherwise, we will return the actual value set by the user.
*/
if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR)
return (ulong)hdr + hdr->page_size;
return hdr->kernel_addr;
}
/**
* android_image_get_kernel() - processes kernel part of Android boot images
* @hdr: Pointer to image header, which is at the start
* of the image.
* @verify: Checksum verification flag. Currently unimplemented.
* @os_data: Pointer to a ulong variable, will hold os data start
* address.
* @os_len: Pointer to a ulong variable, will hold os data length.
*
* This function returns the os image's start address and length. Also,
* it appends the kernel command line to the bootargs env variable.
*
* Return: Zero, os start address and length on success,
* otherwise on failure.
*/
int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify,
ulong *os_data, ulong *os_len)
{
u32 kernel_addr = android_image_get_kernel_addr(hdr);
/*
* Not all Android tools use the id field for signing the image with
* sha1 (or anything) so we don't check it. It is not obvious that the
* string is null terminated so we take care of this.
*/
strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE);
andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0';
if (strlen(andr_tmp_str))
printf("Android's image name: %s\n", andr_tmp_str);
printf("Kernel load addr 0x%08x size %u KiB\n",
kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024));
int len = 0;
if (*hdr->cmdline) {
printf("Kernel command line: %s\n", hdr->cmdline);
len += strlen(hdr->cmdline);
}
char *bootargs = env_get("bootargs");
if (bootargs)
len += strlen(bootargs);
char *newbootargs = malloc(len + 2);
if (!newbootargs) {
puts("Error: malloc in android_image_get_kernel failed!\n");
return -ENOMEM;
}
*newbootargs = '\0';
if (bootargs) {
strcpy(newbootargs, bootargs);
strcat(newbootargs, " ");
}
if (*hdr->cmdline)
strcat(newbootargs, hdr->cmdline);
env_set("bootargs", newbootargs);
if (os_data) {
*os_data = (ulong)hdr;
*os_data += hdr->page_size;
}
if (os_len)
*os_len = hdr->kernel_size;
return 0;
}
int android_image_check_header(const struct andr_img_hdr *hdr)
{
return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE);
}
ulong android_image_get_end(const struct andr_img_hdr *hdr)
{
ulong end;
/*
* The header takes a full page, the remaining components are aligned
* on page boundary
*/
end = (ulong)hdr;
end += hdr->page_size;
end += ALIGN(hdr->kernel_size, hdr->page_size);
end += ALIGN(hdr->ramdisk_size, hdr->page_size);
end += ALIGN(hdr->second_size, hdr->page_size);
return end;
}
ulong android_image_get_kload(const struct andr_img_hdr *hdr)
{
return android_image_get_kernel_addr(hdr);
}
int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
ulong *rd_data, ulong *rd_len)
{
if (!hdr->ramdisk_size) {
*rd_data = *rd_len = 0;
return -1;
}
printf("RAM disk load addr 0x%08x size %u KiB\n",
hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024));
*rd_data = (unsigned long)hdr;
*rd_data += hdr->page_size;
*rd_data += ALIGN(hdr->kernel_size, hdr->page_size);
*rd_len = hdr->ramdisk_size;
return 0;
}
#if !defined(CONFIG_SPL_BUILD)
/**
* android_print_contents - prints out the contents of the Android format image
* @hdr: pointer to the Android format image header
*
* android_print_contents() formats a multi line Android image contents
* description.
* The routine prints out Android image properties
*
* returns:
* no returned results
*/
void android_print_contents(const struct andr_img_hdr *hdr)
{
const char * const p = IMAGE_INDENT_STRING;
/* os_version = ver << 11 | lvl */
u32 os_ver = hdr->os_version >> 11;
u32 os_lvl = hdr->os_version & ((1U << 11) - 1);
printf("%skernel size: %x\n", p, hdr->kernel_size);
printf("%skernel address: %x\n", p, hdr->kernel_addr);
printf("%sramdisk size: %x\n", p, hdr->ramdisk_size);
printf("%sramdisk addrress: %x\n", p, hdr->ramdisk_addr);
printf("%ssecond size: %x\n", p, hdr->second_size);
printf("%ssecond address: %x\n", p, hdr->second_addr);
printf("%stags address: %x\n", p, hdr->tags_addr);
printf("%spage size: %x\n", p, hdr->page_size);
/* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C)
* lvl = ((Y - 2000) & 127) << 4 | M (7 bits for Y, 4 bits for M) */
printf("%sos_version: %x (ver: %u.%u.%u, level: %u.%u)\n",
p, hdr->os_version,
(os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
(os_lvl >> 4) + 2000, os_lvl & 0x0F);
printf("%sname: %s\n", p, hdr->name);
printf("%scmdline: %s\n", p, hdr->cmdline);
}
#endif
|
