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
|
/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "bootimg_utils.h"
#include "util.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static void bootimg_set_cmdline_v3_and_above(boot_img_hdr_v3* h, const std::string& cmdline) {
if (cmdline.size() >= sizeof(h->cmdline)) die("command line too large: %zu", cmdline.size());
strcpy(reinterpret_cast<char*>(h->cmdline), cmdline.c_str());
}
void bootimg_set_cmdline(boot_img_hdr_v2* h, const std::string& cmdline) {
if (h->header_version >= 3) {
return bootimg_set_cmdline_v3_and_above(reinterpret_cast<boot_img_hdr_v3*>(h), cmdline);
}
if (cmdline.size() >= sizeof(h->cmdline)) die("command line too large: %zu", cmdline.size());
strcpy(reinterpret_cast<char*>(h->cmdline), cmdline.c_str());
}
static void mkbootimg_v3_and_above(const std::vector<char>& kernel,
const std::vector<char>& ramdisk, const boot_img_hdr_v2& src,
std::vector<char>* out) {
#define V3_PAGE_SIZE 4096
const size_t page_mask = V3_PAGE_SIZE - 1;
int64_t kernel_actual = (kernel.size() + page_mask) & (~page_mask);
int64_t ramdisk_actual = (ramdisk.size() + page_mask) & (~page_mask);
int64_t bootimg_size = V3_PAGE_SIZE + kernel_actual + ramdisk_actual;
out->resize(bootimg_size);
boot_img_hdr_v3* hdr = reinterpret_cast<boot_img_hdr_v3*>(out->data());
memcpy(hdr->magic, BOOT_MAGIC, BOOT_MAGIC_SIZE);
hdr->kernel_size = kernel.size();
hdr->ramdisk_size = ramdisk.size();
hdr->os_version = src.os_version;
hdr->header_size = sizeof(boot_img_hdr_v3);
hdr->header_version = src.header_version;
if (src.header_version >= 4) {
auto hdr_v4 = reinterpret_cast<boot_img_hdr_v4*>(hdr);
hdr_v4->signature_size = 0;
}
memcpy(hdr->magic + V3_PAGE_SIZE, kernel.data(), kernel.size());
memcpy(hdr->magic + V3_PAGE_SIZE + kernel_actual, ramdisk.data(), ramdisk.size());
}
void mkbootimg(const std::vector<char>& kernel, const std::vector<char>& ramdisk,
const std::vector<char>& second, const std::vector<char>& dtb, size_t base,
const boot_img_hdr_v2& src, std::vector<char>* out) {
if (src.header_version >= 3) {
if (!second.empty() || !dtb.empty()) {
die("Second stage bootloader and dtb not supported in v%d boot image\n",
src.header_version);
}
mkbootimg_v3_and_above(kernel, ramdisk, src, out);
return;
}
const size_t page_mask = src.page_size - 1;
int64_t header_actual = (sizeof(boot_img_hdr_v1) + page_mask) & (~page_mask);
int64_t kernel_actual = (kernel.size() + page_mask) & (~page_mask);
int64_t ramdisk_actual = (ramdisk.size() + page_mask) & (~page_mask);
int64_t second_actual = (second.size() + page_mask) & (~page_mask);
int64_t dtb_actual = (dtb.size() + page_mask) & (~page_mask);
int64_t bootimg_size =
header_actual + kernel_actual + ramdisk_actual + second_actual + dtb_actual;
out->resize(bootimg_size);
boot_img_hdr_v2* hdr = reinterpret_cast<boot_img_hdr_v2*>(out->data());
*hdr = src;
memcpy(hdr->magic, BOOT_MAGIC, BOOT_MAGIC_SIZE);
hdr->kernel_size = kernel.size();
hdr->ramdisk_size = ramdisk.size();
hdr->second_size = second.size();
hdr->kernel_addr += base;
hdr->ramdisk_addr += base;
hdr->second_addr += base;
hdr->tags_addr += base;
if (hdr->header_version == 1) {
hdr->header_size = sizeof(boot_img_hdr_v1);
} else if (hdr->header_version == 2) {
hdr->header_size = sizeof(boot_img_hdr_v2);
hdr->dtb_size = dtb.size();
hdr->dtb_addr += base;
}
memcpy(hdr->magic + hdr->page_size, kernel.data(), kernel.size());
memcpy(hdr->magic + hdr->page_size + kernel_actual, ramdisk.data(), ramdisk.size());
memcpy(hdr->magic + hdr->page_size + kernel_actual + ramdisk_actual, second.data(),
second.size());
memcpy(hdr->magic + hdr->page_size + kernel_actual + ramdisk_actual + second_actual, dtb.data(),
dtb.size());
}
|
