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Commit 53197fc4 authored by Jason Wessel's avatar Jason Wessel
Browse files

Separate the gdbstub from the debug core 



Split the former kernel/kgdb.c into debug_core.c which contains the
kernel debugger exception logic and to the gdbstub.c which contains
the logic for allowing gdb to talk to the debug core.

This also created a private include file called debug_core.h which
contains all the definitions to glue the debug_core to any other
debugger connections.

CC: Ingo Molnar <mingo@elte.hu>
Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
parent c4338209

include/linux/kgdb.h

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Original line number Diff line number Diff line
@@ -264,6 +264,7 @@ extern unsigned long __weak kgdb_arch_pc(int exception, struct pt_regs *regs); 


extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops);

extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops);

extern struct kgdb_io *dbg_io_ops;



extern int kgdb_hex2long(char **ptr, unsigned long *long_val);

extern int kgdb_mem2hex(char *mem, char *buf, int count);

kernel/debug/Makefile

+1 −2
Original line number Diff line number Diff line
@@ -2,5 +2,4 @@ 
# Makefile for the linux kernel debugger

#



obj-$(CONFIG_KGDB) += debug_core.o

obj-$(CONFIG_KGDB) += debug_core.o gdbstub.o

kernel/debug/debug_core.c

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kernel/debug/debug_core.h

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Original line number Diff line number Diff line 
/*

 * Created by: Jason Wessel <jason.wessel@windriver.com>

 *

 * Copyright (c) 2009 Wind River Systems, Inc.  All Rights Reserved.

 *

 * This file is licensed under the terms of the GNU General Public

 * License version 2. This program is licensed "as is" without any

 * warranty of any kind, whether express or implied.

 */



#ifndef _DEBUG_CORE_H_

#define _DEBUG_CORE_H_

/*

 * These are the private implementation headers between the kernel

 * debugger core and the debugger front end code.

 */



/* kernel debug core data structures */

struct kgdb_state {

	int			ex_vector;

	int			signo;

	int			err_code;

	int			cpu;

	int			pass_exception;

	unsigned long		thr_query;

	unsigned long		threadid;

	long			kgdb_usethreadid;

	struct pt_regs		*linux_regs;

};



/* Exception state values */

#define DCPU_WANT_MASTER 0x1 /* Waiting to become a master kgdb cpu */

#define DCPU_NEXT_MASTER 0x2 /* Transition from one master cpu to another */

#define DCPU_IS_SLAVE    0x4 /* Slave cpu enter exception */

#define DCPU_SSTEP       0x8 /* CPU is single stepping */



struct debuggerinfo_struct {

	void			*debuggerinfo;

	struct task_struct	*task;

	int			exception_state;

};



extern struct debuggerinfo_struct kgdb_info[];



/* kernel debug core break point routines */

extern int dbg_remove_all_break(void);

extern int dbg_set_sw_break(unsigned long addr);

extern int dbg_remove_sw_break(unsigned long addr);

extern int dbg_activate_sw_breakpoints(void);



/* gdbstub interface functions */

extern int gdb_serial_stub(struct kgdb_state *ks);

extern void gdbstub_msg_write(const char *s, int len);



#endif /* _DEBUG_CORE_H_ */

kernel/debug/gdbstub.c

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