diff options
Diffstat (limited to 'util/mbchk.c')
| -rw-r--r-- | util/mbchk.c | 244 |
1 files changed, 0 insertions, 244 deletions
diff --git a/util/mbchk.c b/util/mbchk.c deleted file mode 100644 index fd71858..0000000 --- a/util/mbchk.c +++ /dev/null @@ -1,244 +0,0 @@ -/* mbchk - a simple checker for the format of a Multiboot kernel */ -/* - * Copyright (C) 1999,2001,2002 Free Software Foundation, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <config.h> - -#include <stdio.h> -#include <stdlib.h> -#include <getopt.h> -#include <multiboot.h> - -static int quiet = 0; -static char *optstring = "hvq"; -static struct option longopts[] = -{ - {"help", no_argument, 0, 'h'}, - {"version", no_argument, 0, 'v'}, - {"quiet", no_argument, 0, 'q'}, - {0} -}; - -static void -usage (int status) -{ - if (status) - fprintf (stderr, "Try ``mbchk --help'' for more information.\n"); - else - printf ("Usage: mbchk [OPTION]... [FILE]...\n" - "Check if the format of FILE complies with the Multiboot Specification.\n" - "\n" - "-q, --quiet suppress all normal output\n" - "-h, --help display this help and exit\n" - "-v, --version output version information and exit.\n" - "\n" - "Report bugs to <bug-grub@gnu.org>.\n"); - - exit (status); -} - -static int -check_multiboot (const char *filename, FILE *fp) -{ - multiboot_header_t *mbh = 0; - int i; - char buf[8192]; - - if (fread (buf, 1, 8192, fp) < 0) - { - fprintf (stderr, "%s: Read error.\n", filename); - return 0; - } - - for (i = 0; i < 8192 - sizeof (multiboot_header_t); i++) - { - unsigned long magic = *((unsigned long *) (buf + i)); - - if (magic == MULTIBOOT_HEADER_MAGIC) - { - mbh = (multiboot_header_t *) (buf + i); - break; - } - } - - if (! mbh) - { - fprintf (stderr, "%s: No Multiboot header.\n", filename); - return 0; - } - - if (! quiet) - printf ("%s: The Multiboot header is found at the offset %d.\n", - filename, i); - - /* Check for the checksum. */ - if (mbh->magic + mbh->flags + mbh->checksum != 0) - { - fprintf (stderr, - "%s: Bad checksum (0x%lx).\n", - filename, mbh->checksum); - return 0; - } - - /* Reserved flags must be zero. */ - if (mbh->flags & ~0x00010003) - { - fprintf (stderr, - "%s: Non-zero is found in reserved flags (0x%lx).\n", - filename, mbh->flags); - return 0; - } - - if (! quiet) - { - printf ("%s: Page alignment is turned %s.\n", - filename, (mbh->flags & 0x1)? "on" : "off"); - printf ("%s: Memory information is turned %s.\n", - filename, (mbh->flags & 0x2)? "on" : "off"); - printf ("%s: Address fields is turned %s.\n", - filename, (mbh->flags & 0x10000)? "on" : "off"); - } - - /* Check for the address fields. */ - if (mbh->flags & 0x10000) - { - if (mbh->header_addr < mbh->load_addr) - { - fprintf (stderr, - "%s: header_addr is less than " - "load_addr (0x%lx > 0x%lx).\n", - filename, mbh->header_addr, mbh->load_addr); - return 0; - } - - if (mbh->load_end_addr && mbh->load_addr >= mbh->load_end_addr) - { - fprintf (stderr, - "%s: load_addr is not less than load_end_addr" - " (0x%lx >= 0x%lx).\n", - filename, mbh->load_addr, mbh->load_end_addr); - return 0; - } - - if (mbh->bss_end_addr && mbh->load_end_addr > mbh->bss_end_addr) - { - fprintf (stderr, - "%s: load_end_addr is greater than bss_end_addr" - " (0x%lx > 0x%lx).\n", - filename, mbh->load_end_addr, mbh->bss_end_addr); - return 0; - } - - if (mbh->load_addr > mbh->entry_addr) - { - fprintf (stderr, - "%s: load_addr is greater than entry_addr" - " (0x%lx > 0x%lx).\n", - filename, mbh->load_addr, mbh->entry_addr); - return 0; - } - - /* FIXME: It is better to check if the entry address is within the - file, especially when the load end address is zero. */ - if (mbh->load_end_addr && mbh->load_end_addr <= mbh->entry_addr) - { - fprintf (stderr, - "%s: load_end_addr is not greater than entry_addr" - " (0x%lx <= 0x%lx).\n", - filename, mbh->load_end_addr, mbh->entry_addr); - return 0; - } - - /* This is a GRUB-specific limitation. */ - if (mbh->load_addr < 0x100000) - { - fprintf (stderr, - "%s: Cannot be loaded at less than 1MB by GRUB" - " (0x%lx).\n", - filename, mbh->load_addr); - return 0; - } - } - - if (! quiet) - printf ("%s: All checks passed.\n", filename); - - return 1; -} - -int -main (int argc, char *argv[]) -{ - int c; - - do - { - c = getopt_long (argc, argv, optstring, longopts, 0); - switch (c) - { - case EOF: - break; - - case 'h': - usage (0); - break; - - case 'v': - printf ("mbchk (GNU GRUB " VERSION ")\n"); - exit (0); - break; - - case 'q': - quiet = 1; - break; - - default: - usage (1); - break; - } - } - while (c != EOF); - - if (optind < argc) - { - while (optind < argc) - { - FILE *fp; - - fp = fopen (argv[optind], "r"); - if (! fp) - { - fprintf (stderr, "%s: No such file.\n", argv[optind]); - exit (1); - } - - if (! check_multiboot (argv[optind], fp)) - exit (1); - - fclose (fp); - optind++; - } - } - else - { - if (! check_multiboot ("<stdin>", stdin)) - exit (1); - } - - return 0; -} |