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1  /*
2   * Copyright (C) 2008 The Android Open Source Project
3   * All rights reserved.
4   *
5   * Redistribution and use in source and binary forms, with or without
6   * modification, are permitted provided that the following conditions
7   * are met:
8   *  * Redistributions of source code must retain the above copyright
9   *    notice, this list of conditions and the following disclaimer.
10   *  * Redistributions in binary form must reproduce the above copyright
11   *    notice, this list of conditions and the following disclaimer in
12   *    the documentation and/or other materials provided with the
13   *    distribution.
14   *
15   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26   * SUCH DAMAGE.
27   */
28  
29  #include "bootimg_utils.h"
30  
31  #include <stdio.h>
32  #include <stdlib.h>
33  #include <string.h>
34  
bootimg_set_cmdline(boot_img_hdr * h,const char * cmdline)35  void bootimg_set_cmdline(boot_img_hdr* h, const char* cmdline)
36  {
37      strcpy((char*) h->cmdline, cmdline);
38  }
39  
mkbootimg(void * kernel,int64_t kernel_size,off_t kernel_offset,void * ramdisk,int64_t ramdisk_size,off_t ramdisk_offset,void * second,int64_t second_size,off_t second_offset,size_t page_size,size_t base,off_t tags_offset,int64_t * bootimg_size)40  boot_img_hdr* mkbootimg(void* kernel, int64_t kernel_size, off_t kernel_offset,
41                          void* ramdisk, int64_t ramdisk_size, off_t ramdisk_offset,
42                          void* second, int64_t second_size, off_t second_offset,
43                          size_t page_size, size_t base, off_t tags_offset,
44                          int64_t* bootimg_size)
45  {
46      size_t page_mask = page_size - 1;
47  
48      int64_t kernel_actual = (kernel_size + page_mask) & (~page_mask);
49      int64_t ramdisk_actual = (ramdisk_size + page_mask) & (~page_mask);
50      int64_t second_actual = (second_size + page_mask) & (~page_mask);
51  
52      *bootimg_size = page_size + kernel_actual + ramdisk_actual + second_actual;
53  
54      boot_img_hdr* hdr = reinterpret_cast<boot_img_hdr*>(calloc(*bootimg_size, 1));
55      if (hdr == nullptr) {
56          return hdr;
57      }
58  
59      memcpy(hdr->magic, BOOT_MAGIC, BOOT_MAGIC_SIZE);
60  
61      hdr->kernel_size =  kernel_size;
62      hdr->ramdisk_size = ramdisk_size;
63      hdr->second_size =  second_size;
64  
65      hdr->kernel_addr =  base + kernel_offset;
66      hdr->ramdisk_addr = base + ramdisk_offset;
67      hdr->second_addr =  base + second_offset;
68      hdr->tags_addr =    base + tags_offset;
69  
70      hdr->page_size =    page_size;
71  
72      memcpy(hdr->magic + page_size, kernel, kernel_size);
73      memcpy(hdr->magic + page_size + kernel_actual, ramdisk, ramdisk_size);
74      memcpy(hdr->magic + page_size + kernel_actual + ramdisk_actual, second, second_size);
75  
76      return hdr;
77  }
78