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/Ethereal-msm8939-beta9/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c

https://bitbucket.org/MilosStamenkovic95/etherealos
C | 57 lines | 33 code | 11 blank | 13 comment | 8 complexity | b993269ab62c5533eaf96e7d716c9387 MD5 | raw file
 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
17int main(int argc, char *argv[])
18{
19	unsigned long long vmlinux_size, vmlinux_load_addr, vmlinuz_load_addr;
20	struct stat sb;
21
22	if (argc != 3) {
23		fprintf(stderr, "Usage: %s <pathname> <vmlinux_load_addr>\n",
24				argv[0]);
25		return EXIT_FAILURE;
26	}
27
28	if (stat(argv[1], &sb) == -1) {
29		perror("stat");
30		return EXIT_FAILURE;
31	}
32
33	/* Convert hex characters to dec number */
34	errno = 0;
35	if (sscanf(argv[2], "%llx", &vmlinux_load_addr) != 1) {
36		if (errno != 0)
37			perror("sscanf");
38		else
39			fprintf(stderr, "No matching characters\n");
40
41		return EXIT_FAILURE;
42	}
43
44	vmlinux_size = (uint64_t)sb.st_size;
45	vmlinuz_load_addr = vmlinux_load_addr + vmlinux_size;
46
47	/*
48	 * Align with 16 bytes: "greater than that used for any standard data
49	 * types by a MIPS compiler." -- See MIPS Run Linux (Second Edition).
50	 */
51
52	vmlinuz_load_addr += (16 - vmlinux_size % 16);
53
54	printf("0x%llx\n", vmlinuz_load_addr);
55
56	return EXIT_SUCCESS;
57}