From d5738f5104b3915d9a9672736c38ad9feb844fd0 Mon Sep 17 00:00:00 2001
From: dbj <dbj@NetBSD.org>
Date: Sat, 5 Jan 2002 22:57:38 +0000
Subject: [PATCH] add support for the `D' kgdb detach command add comment about
 minimum requirement for KGDB_BUFLEN

---
 sys/kern/kgdb_stub.c | 7 +++++--
 sys/sys/kgdb.h       | 3 ++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/sys/kern/kgdb_stub.c b/sys/kern/kgdb_stub.c
index 068b183b8e93..5baf4887d111 100644
--- a/sys/kern/kgdb_stub.c
+++ b/sys/kern/kgdb_stub.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: kgdb_stub.c,v 1.11 2001/11/20 08:43:46 lukem Exp $	*/
+/*	$NetBSD: kgdb_stub.c,v 1.12 2002/01/05 22:57:38 dbj Exp $	*/
 
 /*
  * Copyright (c) 1990, 1993
@@ -49,7 +49,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kgdb_stub.c,v 1.11 2001/11/20 08:43:46 lukem Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kgdb_stub.c,v 1.12 2002/01/05 22:57:38 dbj Exp $");
 
 #include "opt_kgdb.h"
 
@@ -88,6 +88,7 @@ static int (*kgdb_getc) __P((void *));
 static void (*kgdb_putc) __P((void *, int));
 static void *kgdb_ioarg;
 
+/* KGDB_BUFLEN must be at least (2*KGDB_NUMREGS*sizeof(kgdb_reg_t)+1) */
 static u_char buffer[KGDB_BUFLEN];
 static kgdb_reg_t gdb_regs[KGDB_NUMREGS];
 
@@ -497,10 +498,12 @@ kgdb_trap(type, regs)
 			kgdb_send("OK");
 			continue;
 
+		case KGDB_DETACH:
 		case KGDB_KILL:
 			kgdb_active = 0;
 			printf("kgdb detached\n");
 			db_clear_single_step(regs);
+			kgdb_send("OK");
 			goto out;
 
 		case KGDB_CONT:
diff --git a/sys/sys/kgdb.h b/sys/sys/kgdb.h
index 58c8fb2675e8..6e6b153cecd3 100644
--- a/sys/sys/kgdb.h
+++ b/sys/sys/kgdb.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: kgdb.h,v 1.5 1998/09/13 14:46:24 christos Exp $	*/
+/*	$NetBSD: kgdb.h,v 1.6 2002/01/05 22:57:38 dbj Exp $	*/
 
 /*
  * Copyright (c) 1992, 1993
@@ -64,6 +64,7 @@
 #define KGDB_CONT	'c'
 #define KGDB_STEP	's'
 #define KGDB_KILL	'k'
+#define KGDB_DETACH	'D'
 #define KGDB_SIGNAL	'?'
 #define KGDB_DEBUG	'd'