[src/trunk]: src/sys/kern Add a "ddb" command (if DDB is configured into the ...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f83e301991e0
branches:  trunk
changeset: 521891:f83e301991e0
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Fri Feb 08 00:58:58 2002 +0000

description:
Add a "ddb" command (if DDB is configured into the kernel) for
easy, convenient dropping into DDB at the "root device: " prompt.
Useful if your console can't do it w/o actually taking an interrupt
and you want to, say, look at the boot messages.

diffstat:

 sys/kern/kern_subr.c |  22 +++++++++++++++++++---
 1 files changed, 19 insertions(+), 3 deletions(-)

diffs (67 lines):

diff -r 13c360c2f698 -r f83e301991e0 sys/kern/kern_subr.c
--- a/sys/kern/kern_subr.c      Fri Feb 08 00:47:04 2002 +0000
+++ b/sys/kern/kern_subr.c      Fri Feb 08 00:58:58 2002 +0000
@@ -1,7 +1,7 @@
-/*     $NetBSD: kern_subr.c,v 1.77 2001/11/12 15:25:15 lukem Exp $     */
+/*     $NetBSD: kern_subr.c,v 1.78 2002/02/08 00:58:58 thorpej Exp $   */
 
 /*-
- * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
+ * Copyright (c) 1997, 1998, 1999, 2002 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
  * This code is derived from software contributed to The NetBSD Foundation
@@ -90,8 +90,9 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_subr.c,v 1.77 2001/11/12 15:25:15 lukem Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_subr.c,v 1.78 2002/02/08 00:58:58 thorpej Exp $");
 
+#include "opt_ddb.h"
 #include "opt_md.h"
 
 #include <sys/param.h>
@@ -775,6 +776,11 @@
                                cpu_reboot(RB_HALT, NULL);
                        else if (len == 6 && strcmp(buf, "reboot") == 0)
                                cpu_reboot(0, NULL);
+#if defined(DDB)
+                       else if (len == 3 && strcmp(buf, "ddb") == 0) {
+                               console_debugger();
+                       }
+#endif
                        else if (len == 7 && strcmp(buf, "generic") == 0) {
                                mountroot = NULL;
                                break;
@@ -788,6 +794,9 @@
                                        if (vops->vfs_mountroot != NULL)
                                                printf(" %s", vops->vfs_name);
                                }
+#if defined(DDB)
+                               printf(" ddb");
+#endif
                                printf(" halt reboot\n");
                        } else {
                                mountroot = vops->vfs_mountroot;
@@ -1013,6 +1022,9 @@
                }
                if (isdump)
                        printf(" none");
+#if defined(DDB)
+               printf(" ddb");
+#endif
                printf(" halt reboot\n");
        }
        return (dv);
@@ -1037,6 +1049,10 @@
                cpu_reboot(RB_HALT, NULL);
        else if (len == 6 && strcmp(str, "reboot") == 0)
                cpu_reboot(0, NULL);
+#if defined(DDB)
+       else if (len == 3 && strcmp(str, "ddb") == 0)
+               console_debugger();
+#endif
 
        cp = str + len - 1;
        c = *cp;