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/*
* linux/arch/m68k/tools/amiga/dmesg.c -- Retrieve the kernel messages stored
* in Chip RAM with the kernel command
* line option `debug=mem'.
*
* © Copyright 1996 by Geert Uytterhoeven <geert@linux-m68k.org>
*
*
* Usage:
*
* dmesg
* dmesg <CHIPMEM_END>
*
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of the Linux
* distribution for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define CHIPMEM_START 0x00000000
#define CHIPMEM_END 0x00200000 /* overridden by argv[1] */
#define SAVEKMSG_MAGIC1 0x53415645 /* 'SAVE' */
#define SAVEKMSG_MAGIC2 0x4B4D5347 /* 'KMSG' */
struct savekmsg {
u_long magic1; /* SAVEKMSG_MAGIC1 */
u_long magic2; /* SAVEKMSG_MAGIC2 */
u_long magicptr; /* address of magic1 */
u_long size;
char data[0];
};
int main(int argc, char *argv[])
{
u_long start = CHIPMEM_START, end = CHIPMEM_END, p;
int found = 0;
struct savekmsg *m = NULL;
if (argc >= 2)
end = strtoul(argv[1], NULL, 0);
printf("Searching for SAVEKMSG magic...\n");
for (p = start; p <= end-sizeof(struct savekmsg); p += 4) {
m = (struct savekmsg *)p;
if ((m->magic1 == SAVEKMSG_MAGIC1) && (m->magic2 == SAVEKMSG_MAGIC2) &&
(m->magicptr == p)) {
found = 1;
break;
}
}
if (!found)
printf("Not found\n");
else {
printf("Found %ld bytes at 0x%08lx\n", m->size, (u_long)&m->data);
puts(">>>>>>>>>>>>>>>>>>>>");
fflush(stdout);
write(1, &m->data, m->size);
fflush(stdout);
puts("<<<<<<<<<<<<<<<<<<<<");
}
return(0);
}
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