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 "../../../../include/linux/sizes.h"
17 
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