LXR linux/arch/mips/boot/compressed/calc_vmlinuz_load

   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}
  58