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/*
* VME Linux/m68k Loader
*
* Dump the contents of a boot loader file (for debugging)
*
* (C) Copyright 1996 by Geert Uytterhoeven
* (Geert.Uytterhoeven@cs.kuleuven.ac.be)
*
* --------------------------------------------------------------------------
*
* Usage:
*
* dumpmapfile [-v|--verbose] [<loaderfile>]
*
* With:
*
* <loaderfile> : path of the map file (default: `/boot/boot.loader')
*
* --------------------------------------------------------------------------
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING for more details.
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <dirent.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/fcntl.h>
#include "../loader.h"
#include "../vmelilo.h"
static const char *ProgramName;
void __attribute__ ((noreturn, format (printf, 1, 2))) Die(const char *fmt, ...)
{
va_list ap;
fflush(stdout);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
exit(1);
}
void __attribute__ ((noreturn)) Usage(void)
{
Die("Usage: %s [-v|--verbose] [loaderfile]\n", ProgramName);
}
int main(int argc, char *argv[])
{
int fh, size = 0;
u_char *data;
const TAGRECORD *tr;
u_long offset = 0;
const char *loaderfile = NULL;
int verbose = 0;
ProgramName = argv[0];
argc--;
argv++;
while (argc) {
if (!strcmp(argv[0], "-h") || !strcmp(argv[0], "--help"))
Usage();
else if (!strcmp(argv[0], "-v") || !strcmp(argv[0], "--verbose"))
verbose = 1;
else if (!loaderfile)
loaderfile = argv[0];
else
Usage();
argc--;
argv++;
}
if (!loaderfile)
loaderfile = LILO_LOADERFILE;
if ((fh = open(loaderfile, O_RDONLY)) == -1)
Die("open %s: %s\n", loaderfile, strerror(errno));
if ((size = lseek(fh, 0, SEEK_END)) == -1)
Die("lseek %s: %s\n", loaderfile, strerror(errno));
if (!(data = malloc(size)))
Die("No memory\n");
if (lseek(fh, 0, SEEK_SET) == -1)
Die("lseek %s: %s\n", loaderfile, strerror(errno));
if (read(fh, data, size) != size)
Die("read %s: %s\n", loaderfile, strerror(errno));
close(fh);
{
const u_long pattern[] = { LILO_ID, LILO_MAPDATAID };
int i;
for (i = 0; i < (size - sizeof(pattern) + 1); i++)
{
if (memcmp(&data[i], pattern, sizeof(pattern)) == 0)
{
/* get offset immediately following pattern */
offset = i + sizeof(pattern) + 4;
goto found_it;
}
}
Die("Couldn't find magic key in loader\n");
found_it:
}
while (1) {
tr = (TAGRECORD *)&data[offset];
if (verbose)
printf("0x%08lx: tag = 0x%08lx, size = 0x%08lx\n\t", offset,
tr->tagid, tr->size);
switch (tr->tagid) {
case TAG_LILO:
printf(" TAG_LILO: File Identification\n");
break;
case TAG_EOF:
printf(" TAG_EOF: End of File\n");
break;
case TAG_HEADER:
printf(" TAG_HEADER: Start of Boot Options\n");
break;
case TAG_HEADER_END:
printf(" TAG_HEADER_END: End of Boot Options\n");
break;
case TAG_DEFAULT:
printf(" TAG_DEFAULT: Default Boot Record = `%s'\n",
(char *)tr->data);
break;
case TAG_MESSAGE:
printf(" TAG_MESSAGE: Boot Message File = `%s'\n",
(char *)tr->data);
break;
case TAG_PROMPT:
printf(" TAG_PROMPT: Prompt = %ld\n", tr->data[0]);
break;
case TAG_RESTRICTED:
printf(" TAG_RESTRICTED: Restricted = %ld\n", tr->data[0]);
break;
case TAG_CALLMONITOR:
printf(" TAG_CALLMONITOR: Call monitor before boot = %ld\n", tr->data[0]);
break;
case TAG_DELAY:
printf(" TAG_DELAY: Delay = %ld seconds\n",
tr->data[0]);
break;
case TAG_TIMEOUT:
printf(" TAG_TIMEOUT: Timeout = %ld seconds\n",
tr->data[0]);
break;
case TAG_DEBUG:
printf(" TAG_DEBUG: Debug = %ld\n", tr->data[0]);
break;
case TAG_BOOT_RECORD:
printf(" TAG_BOOT_RECORD: Start of Boot Record `%s'\n",
(char *)tr->data);
break;
case TAG_BOOT_RECORD_END:
printf(" TAG_BOOT_RECORD_END: End of Boot Record\n");
break;
case TAG_ALIAS:
printf(" TAG_ALIAS: Alias Label = `%s'\n",
(char *)tr->data);
break;
case TAG_KERNEL:
printf(" TAG_KERNEL: Kernel Image = `%s'\n",
(char *)tr->data);
break;
case TAG_SYMTAB:
printf(" TAG_SYMTAB: Symbol File = `%s'\n",
(char *)tr->data);
break;
case TAG_ARGUMENTS:
printf(" TAG_ARGUMENTS: Boot Arguments = `%s'\n",
(char *)tr->data);
break;
case TAG_PASSWORD:
printf(" TAG_PASSWORD: Boot Record Password = `%s'\n",
(char *)tr->data);
break;
case TAG_RAMDISK:
printf(" TAG_RAMDISK: Ramdisk Image = `%s'\n",
(char *)tr->data);
break;
case TAG_MEMSIZE:
printf(" TAG_MEMSIZE: DRAM size = `%ld'\n",
tr->data[0]);
break;
case TAG_FILE_DEF:
printf(" TAG_FILE_DEF: Start of File Definition `%s'\n",
(char *)tr->data);
break;
case TAG_FILE_DEF_END:
printf(" TAG_FILE_DEF_END: End of File Definition\n");
break;
case TAG_FILEMAP:
printf(" TAG_FILEMAP: File map containing %ld bytes in %ld fragments\n",
tr->data[0], tr->data[1]);
break;
default:
printf(" <UNKNOWN>\n");
break;
}
offset += sizeof(TAGRECORD) + tr->size;
if (offset > size) {
puts("Warning: Beyond end of file");
break;
}
if (tr->tagid == TAG_EOF)
break;
}
if (offset < size)
printf("Warning: Left %ld bytes\n", size-offset);
return(0);
}
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