* Debugger modules now have two methods: enter_debugger() and exit_debugger().

* The kernel now opens up to 8 debugger modules (and puts them into an array;
  maybe we'll want to switch to a doubly linked list when there is the need).
* Implemented an example debugger module that prints a stack trace of the
  current thread when the kernel debugger is entered (not included in the
  image).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23794 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/debug.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2007, Axel Dörfler, [email protected]
+ * Copyright 2002-2008, Axel Dörfler, [email protected]
  * Distributed under the terms of the Haiku License.
  *
  * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
@@ -10,6 +10,8 @@
 
 
 #include <KernelExport.h>
+#include <module.h>
+
 
 #define KDEBUG 1
 
@@ -18,7 +20,7 @@
  * The kernel debug level. 
  * Level 1 is usual asserts, > 1 should be used for very expensive runtime checks
  */
-#define KDEBUG 1
+#	define KDEBUG 1
 #endif
 
 #define ASSERT_ALWAYS(x) \
@@ -42,6 +44,13 @@
 
 #define B_KDEBUG_DONT_PARSE_ARGUMENTS	(0x01)
 
+struct debugger_module_info {
+	module_info info;
+
+	void (*enter_debugger)(void);
+	void (*exit_debugger)(void);
+};
+
 extern int dbg_register_file[B_MAX_CPU_COUNT][14];
 
 #ifdef __cplusplus