1 /*
2 * Copyright (C) 2010 "Wu Zhangjin" <wuzhangjin@gmail.com>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 */
9
10 #include <sys/types.h>
11 #include <sys/stat.h>
12 #include <errno.h>
13 #include <stdint.h>
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <linux/sizes.h>
17
main(int argc, char *argv[])18 int main(int argc, char *argv[])
19 {
20 unsigned long long vmlinux_size, vmlinux_load_addr, vmlinuz_load_addr;
21 struct stat sb;
22
23 if (argc != 3) {
24 fprintf(stderr, "Usage: %s <pathname> <vmlinux_load_addr>\n",
25 argv[0]);
26 return EXIT_FAILURE;
27 }
28
29 if (stat(argv[1], &sb) == -1) {
30 perror("stat");
31 return EXIT_FAILURE;
32 }
33
34 /* Convert hex characters to dec number */
35 errno = 0;
36 if (sscanf(argv[2], "%llx", &vmlinux_load_addr) != 1) {
37 if (errno != 0)
38 perror("sscanf");
39 else
40 fprintf(stderr, "No matching characters\n");
41
42 return EXIT_FAILURE;
43 }
44
45 vmlinux_size = (uint64_t)sb.st_size;
46 vmlinuz_load_addr = vmlinux_load_addr + vmlinux_size;
47
48 /*
49 * Align with 64KB: KEXEC needs load sections to be aligned to PAGE_SIZE,
50 * which may be as large as 64KB depending on the kernel configuration.
51 */
52
53 vmlinuz_load_addr += (SZ_64K - vmlinux_size % SZ_64K);
54
55 printf("0x%llx\n", vmlinuz_load_addr);
56
57 return EXIT_SUCCESS;
58 }
59