summaryrefslogtreecommitdiff
path: root/arch/m68k/tools/amiga/dmesg.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/tools/amiga/dmesg.c')
-rw-r--r--arch/m68k/tools/amiga/dmesg.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/m68k/tools/amiga/dmesg.c b/arch/m68k/tools/amiga/dmesg.c
new file mode 100644
index 00000000000..e892748e738
--- /dev/null
+++ b/arch/m68k/tools/amiga/dmesg.c
@@ -0,0 +1,69 @@
+/*
+ * 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);
+}