[net-next-2.6.git] / include / linux / kgdb.h

/*
 * This provides the callbacks and functions that KGDB needs to share between
 * the core, I/O and arch-specific portions.
 *
 * Author: Amit Kale <amitkale@linsyssoft.com> and
 *         Tom Rini <trini@kernel.crashing.org>
 *
 * 2001-2004 (c) Amit S. Kale and 2003-2005 (c) MontaVista Software, Inc.
 * 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 _KGDB_H_
#define _KGDB_H_

#include <linux/serial_8250.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/atomic.h>
#ifdef CONFIG_HAVE_ARCH_KGDB
#include <asm/kgdb.h>
#endif

#ifdef CONFIG_KGDB
struct pt_regs;

/**
 *	kgdb_skipexception - (optional) exit kgdb_handle_exception early
 *	@exception: Exception vector number
 *	@regs: Current &struct pt_regs.
 *
 *	On some architectures it is required to skip a breakpoint
 *	exception when it occurs after a breakpoint has been removed.
 *	This can be implemented in the architecture specific portion of kgdb.
 */
extern int kgdb_skipexception(int exception, struct pt_regs *regs);

/**
 *	kgdb_disable_hw_debug - (optional) Disable hardware debugging hook
 *	@regs: Current &struct pt_regs.
 *
 *	This function will be called if the particular architecture must
 *	disable hardware debugging while it is processing gdb packets or
 *	handling exception.
 */
extern void kgdb_disable_hw_debug(struct pt_regs *regs);

struct tasklet_struct;
struct task_struct;
struct uart_port;

/**
 *	kgdb_breakpoint - compiled in breakpoint
 *
 *	This will be implemented as a static inline per architecture.  This
 *	function is called by the kgdb core to execute an architecture
 *	specific trap to cause kgdb to enter the exception processing.
 *
 */
void kgdb_breakpoint(void);

extern int kgdb_connected;
extern int kgdb_io_module_registered;

extern atomic_t			kgdb_setting_breakpoint;
extern atomic_t			kgdb_cpu_doing_single_step;

extern struct task_struct	*kgdb_usethread;
extern struct task_struct	*kgdb_contthread;

enum kgdb_bptype {
	BP_BREAKPOINT = 0,
	BP_HARDWARE_BREAKPOINT,
	BP_WRITE_WATCHPOINT,
	BP_READ_WATCHPOINT,
	BP_ACCESS_WATCHPOINT
};

enum kgdb_bpstate {
	BP_UNDEFINED = 0,
	BP_REMOVED,
	BP_SET,
	BP_ACTIVE
};

struct kgdb_bkpt {
	unsigned long		bpt_addr;
	unsigned char		saved_instr[BREAK_INSTR_SIZE];
	enum kgdb_bptype	type;
	enum kgdb_bpstate	state;
};

struct dbg_reg_def_t {
	char *name;
	int size;
	int offset;
};

#ifndef DBG_MAX_REG_NUM
#define DBG_MAX_REG_NUM 0
#else
extern struct dbg_reg_def_t dbg_reg_def[];
extern char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs);
extern int dbg_set_reg(int regno, void *mem, struct pt_regs *regs);
#endif
#ifndef KGDB_MAX_BREAKPOINTS
# define KGDB_MAX_BREAKPOINTS	1000
#endif

#define KGDB_HW_BREAKPOINT	1

/*
 * Functions each KGDB-supporting architecture must provide:
 */

/**
 *	kgdb_arch_init - Perform any architecture specific initalization.
 *
 *	This function will handle the initalization of any architecture
 *	specific callbacks.
 */
extern int kgdb_arch_init(void);

/**
 *	kgdb_arch_exit - Perform any architecture specific uninitalization.
 *
 *	This function will handle the uninitalization of any architecture
 *	specific callbacks, for dynamic registration and unregistration.
 */
extern void kgdb_arch_exit(void);

/**
 *	pt_regs_to_gdb_regs - Convert ptrace regs to GDB regs
 *	@gdb_regs: A pointer to hold the registers in the order GDB wants.
 *	@regs: The &struct pt_regs of the current process.
 *
 *	Convert the pt_regs in @regs into the format for registers that
 *	GDB expects, stored in @gdb_regs.
 */
extern void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs);

/**
 *	sleeping_thread_to_gdb_regs - Convert ptrace regs to GDB regs
 *	@gdb_regs: A pointer to hold the registers in the order GDB wants.
 *	@p: The &struct task_struct of the desired process.
 *
 *	Convert the register values of the sleeping process in @p to
 *	the format that GDB expects.
 *	This function is called when kgdb does not have access to the
 *	&struct pt_regs and therefore it should fill the gdb registers
 *	@gdb_regs with what has	been saved in &struct thread_struct
 *	thread field during switch_to.
 */
extern void
sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p);

/**
 *	gdb_regs_to_pt_regs - Convert GDB regs to ptrace regs.
 *	@gdb_regs: A pointer to hold the registers we've received from GDB.
 *	@regs: A pointer to a &struct pt_regs to hold these values in.
 *
 *	Convert the GDB regs in @gdb_regs into the pt_regs, and store them
 *	in @regs.
 */
extern void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs);

/**
 *	kgdb_arch_handle_exception - Handle architecture specific GDB packets.
 *	@vector: The error vector of the exception that happened.
 *	@signo: The signal number of the exception that happened.
 *	@err_code: The error code of the exception that happened.
 *	@remcom_in_buffer: The buffer of the packet we have read.
 *	@remcom_out_buffer: The buffer of %BUFMAX bytes to write a packet into.
 *	@regs: The &struct pt_regs of the current process.
 *
 *	This function MUST handle the 'c' and 's' command packets,
 *	as well packets to set / remove a hardware breakpoint, if used.
 *	If there are additional packets which the hardware needs to handle,
 *	they are handled here.  The code should return -1 if it wants to
 *	process more packets, and a %0 or %1 if it wants to exit from the
 *	kgdb callback.
 */
extern int
kgdb_arch_handle_exception(int vector, int signo, int err_code,
			   char *remcom_in_buffer,
			   char *remcom_out_buffer,
			   struct pt_regs *regs);

/**
 *	kgdb_roundup_cpus - Get other CPUs into a holding pattern
 *	@flags: Current IRQ state
 *
 *	On SMP systems, we need to get the attention of the other CPUs
 *	and get them into a known state.  This should do what is needed
 *	to get the other CPUs to call kgdb_wait(). Note that on some arches,
 *	the NMI approach is not used for rounding up all the CPUs. For example,
 *	in case of MIPS, smp_call_function() is used to roundup CPUs. In
 *	this case, we have to make sure that interrupts are enabled before
 *	calling smp_call_function(). The argument to this function is
 *	the flags that will be used when restoring the interrupts. There is
 *	local_irq_save() call before kgdb_roundup_cpus().
 *
 *	On non-SMP systems, this is not called.
 */
extern void kgdb_roundup_cpus(unsigned long flags);

/**
 *	kgdb_arch_set_pc - Generic call back to the program counter
 *	@regs: Current &struct pt_regs.
 *  @pc: The new value for the program counter
 *
 *	This function handles updating the program counter and requires an
 *	architecture specific implementation.
 */
extern void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc);


/* Optional functions. */
extern int kgdb_validate_break_address(unsigned long addr);
extern int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr);
extern int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle);

/**
 *	kgdb_arch_late - Perform any architecture specific initalization.
 *
 *	This function will handle the late initalization of any
 *	architecture specific callbacks.  This is an optional function for
 *	handling things like late initialization of hw breakpoints.  The
 *	default implementation does nothing.
 */
extern void kgdb_arch_late(void);


/**
 * struct kgdb_arch - Describe architecture specific values.
 * @gdb_bpt_instr: The instruction to trigger a breakpoint.
 * @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
 * @set_breakpoint: Allow an architecture to specify how to set a software
 * breakpoint.
 * @remove_breakpoint: Allow an architecture to specify how to remove a
 * software breakpoint.
 * @set_hw_breakpoint: Allow an architecture to specify how to set a hardware
 * breakpoint.
 * @remove_hw_breakpoint: Allow an architecture to specify how to remove a
 * hardware breakpoint.
 * @remove_all_hw_break: Allow an architecture to specify how to remove all
 * hardware breakpoints.
 * @correct_hw_break: Allow an architecture to specify how to correct the
 * hardware debug registers.
 */
struct kgdb_arch {
	unsigned char		gdb_bpt_instr[BREAK_INSTR_SIZE];
	unsigned long		flags;

	int	(*set_breakpoint)(unsigned long, char *);
	int	(*remove_breakpoint)(unsigned long, char *);
	int	(*set_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
	int	(*remove_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
	void	(*remove_all_hw_break)(void);
	void	(*correct_hw_break)(void);
};

/**
 * struct kgdb_io - Describe the interface for an I/O driver to talk with KGDB.
 * @name: Name of the I/O driver.
 * @read_char: Pointer to a function that will return one char.
 * @write_char: Pointer to a function that will write one char.
 * @flush: Pointer to a function that will flush any pending writes.
 * @init: Pointer to a function that will initialize the device.
 * @pre_exception: Pointer to a function that will do any prep work for
 * the I/O driver.
 * @post_exception: Pointer to a function that will do any cleanup work
 * for the I/O driver.
 * @is_console: 1 if the end device is a console 0 if the I/O device is
 * not a console
 */
struct kgdb_io {
	const char		*name;
	int			(*read_char) (void);
	void			(*write_char) (u8);
	void			(*flush) (void);
	int			(*init) (void);
	void			(*pre_exception) (void);
	void			(*post_exception) (void);
	int			is_console;
};

extern struct kgdb_arch		arch_kgdb_ops;

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 char *kgdb_mem2hex(char *mem, char *buf, int count);
extern int kgdb_hex2mem(char *buf, char *mem, int count);

extern int kgdb_isremovedbreak(unsigned long addr);
extern void kgdb_schedule_breakpoint(void);

extern int
kgdb_handle_exception(int ex_vector, int signo, int err_code,
		      struct pt_regs *regs);
extern int kgdb_nmicallback(int cpu, void *regs);

extern int			kgdb_single_step;
extern atomic_t			kgdb_active;
#define in_dbg_master() \
	(raw_smp_processor_id() == atomic_read(&kgdb_active))
extern bool dbg_is_early;
extern void __init dbg_late_init(void);
#else /* ! CONFIG_KGDB */
#define in_dbg_master() (0)
#define dbg_late_init()
#endif /* ! CONFIG_KGDB */
#endif /* _KGDB_H_ */
Commit	Line	Data
dc7d5527 JW	1	/*
	2	* This provides the callbacks and functions that KGDB needs to share between
	3	* the core, I/O and arch-specific portions.
	4	*
	5	* Author: Amit Kale <amitkale@linsyssoft.com> and
	6	* Tom Rini <trini@kernel.crashing.org>
	7	*
	8	* 2001-2004 (c) Amit S. Kale and 2003-2005 (c) MontaVista Software, Inc.
	9	* This file is licensed under the terms of the GNU General Public License
	10	* version 2. This program is licensed "as is" without any warranty of any
	11	* kind, whether express or implied.
	12	*/
	13	#ifndef _KGDB_H_
	14	#define _KGDB_H_
	15
	16	#include <linux/serial_8250.h>
	17	#include <linux/linkage.h>
	18	#include <linux/init.h>
dc7d5527	19	#include <asm/atomic.h>
dcc78711	20	#ifdef CONFIG_HAVE_ARCH_KGDB
dc7d5527	21	#include <asm/kgdb.h>
dcc78711	22	#endif
dc7d5527	23
dcc78711	24	#ifdef CONFIG_KGDB
dc7d5527 JW	25	struct pt_regs;
dc7d5527 JW	26
e3e2aaf7 JW	27	/**
e3e2aaf7 JW	28	* kgdb_skipexception - (optional) exit kgdb_handle_exception early
dc7d5527 JW	29	* @exception: Exception vector number
	30	* @regs: Current &struct pt_regs.
	31	*
e3e2aaf7 JW	32	* On some architectures it is required to skip a breakpoint
e3e2aaf7 JW	33	* exception when it occurs after a breakpoint has been removed.
b11e1eca	34	* This can be implemented in the architecture specific portion of kgdb.
dc7d5527 JW	35	*/
	36	extern int kgdb_skipexception(int exception, struct pt_regs *regs);
	37
e3e2aaf7 JW	38	/**
e3e2aaf7 JW	39	* kgdb_disable_hw_debug - (optional) Disable hardware debugging hook
dc7d5527 JW	40	* @regs: Current &struct pt_regs.
	41	*
	42	* This function will be called if the particular architecture must
	43	* disable hardware debugging while it is processing gdb packets or
	44	* handling exception.
	45	*/
	46	extern void kgdb_disable_hw_debug(struct pt_regs *regs);
	47
	48	struct tasklet_struct;
	49	struct task_struct;
	50	struct uart_port;
	51
e3e2aaf7 JW	52	/**
	53	* kgdb_breakpoint - compiled in breakpoint
	54	*
b11e1eca	55	* This will be implemented as a static inline per architecture. This
e3e2aaf7 JW	56	* function is called by the kgdb core to execute an architecture
	57	* specific trap to cause kgdb to enter the exception processing.
	58	*
	59	*/
dc7d5527 JW	60	void kgdb_breakpoint(void);
	61
	62	extern int kgdb_connected;
f503b5ae	63	extern int kgdb_io_module_registered;
dc7d5527 JW	64
	65	extern atomic_t kgdb_setting_breakpoint;
	66	extern atomic_t kgdb_cpu_doing_single_step;
	67
	68	extern struct task_struct *kgdb_usethread;
	69	extern struct task_struct *kgdb_contthread;
	70
	71	enum kgdb_bptype {
	72	BP_BREAKPOINT = 0,
	73	BP_HARDWARE_BREAKPOINT,
	74	BP_WRITE_WATCHPOINT,
	75	BP_READ_WATCHPOINT,
	76	BP_ACCESS_WATCHPOINT
	77	};
	78
	79	enum kgdb_bpstate {
	80	BP_UNDEFINED = 0,
	81	BP_REMOVED,
	82	BP_SET,
	83	BP_ACTIVE
	84	};
	85
	86	struct kgdb_bkpt {
	87	unsigned long bpt_addr;
	88	unsigned char saved_instr[BREAK_INSTR_SIZE];
	89	enum kgdb_bptype type;
	90	enum kgdb_bpstate state;
	91	};
	92
534af108 JW	93	struct dbg_reg_def_t {
	94	char *name;
	95	int size;
	96	int offset;
	97	};
	98
	99	#ifndef DBG_MAX_REG_NUM
	100	#define DBG_MAX_REG_NUM 0
	101	#else
	102	extern struct dbg_reg_def_t dbg_reg_def[];
	103	extern char dbg_get_reg(int regno, void mem, struct pt_regs *regs);
	104	extern int dbg_set_reg(int regno, void mem, struct pt_regs regs);
	105	#endif
dc7d5527 JW	106	#ifndef KGDB_MAX_BREAKPOINTS
	107	# define KGDB_MAX_BREAKPOINTS 1000
	108	#endif
	109
	110	#define KGDB_HW_BREAKPOINT 1
	111
	112	/*
	113	* Functions each KGDB-supporting architecture must provide:
	114	*/
	115
e3e2aaf7	116	/**
dc7d5527 JW	117	* kgdb_arch_init - Perform any architecture specific initalization.
	118	*
	119	* This function will handle the initalization of any architecture
	120	* specific callbacks.
	121	*/
	122	extern int kgdb_arch_init(void);
	123
e3e2aaf7	124	/**
dc7d5527 JW	125	* kgdb_arch_exit - Perform any architecture specific uninitalization.
	126	*
	127	* This function will handle the uninitalization of any architecture
	128	* specific callbacks, for dynamic registration and unregistration.
	129	*/
	130	extern void kgdb_arch_exit(void);
	131
e3e2aaf7	132	/**
dc7d5527 JW	133	* pt_regs_to_gdb_regs - Convert ptrace regs to GDB regs
	134	* @gdb_regs: A pointer to hold the registers in the order GDB wants.
	135	* @regs: The &struct pt_regs of the current process.
	136	*
	137	* Convert the pt_regs in @regs into the format for registers that
	138	* GDB expects, stored in @gdb_regs.
	139	*/
	140	extern void pt_regs_to_gdb_regs(unsigned long gdb_regs, struct pt_regs regs);
	141
e3e2aaf7	142	/**
dc7d5527 JW	143	* sleeping_thread_to_gdb_regs - Convert ptrace regs to GDB regs
	144	* @gdb_regs: A pointer to hold the registers in the order GDB wants.
	145	* @p: The &struct task_struct of the desired process.
	146	*
	147	* Convert the register values of the sleeping process in @p to
	148	* the format that GDB expects.
	149	* This function is called when kgdb does not have access to the
	150	* &struct pt_regs and therefore it should fill the gdb registers
	151	* @gdb_regs with what has been saved in &struct thread_struct
	152	* thread field during switch_to.
	153	*/
	154	extern void
	155	sleeping_thread_to_gdb_regs(unsigned long gdb_regs, struct task_struct p);
	156
e3e2aaf7	157	/**
dc7d5527 JW	158	* gdb_regs_to_pt_regs - Convert GDB regs to ptrace regs.
	159	* @gdb_regs: A pointer to hold the registers we've received from GDB.
	160	* @regs: A pointer to a &struct pt_regs to hold these values in.
	161	*
	162	* Convert the GDB regs in @gdb_regs into the pt_regs, and store them
	163	* in @regs.
	164	*/
	165	extern void gdb_regs_to_pt_regs(unsigned long gdb_regs, struct pt_regs regs);
	166
e3e2aaf7	167	/**
dc7d5527 JW	168	* kgdb_arch_handle_exception - Handle architecture specific GDB packets.
	169	* @vector: The error vector of the exception that happened.
	170	* @signo: The signal number of the exception that happened.
	171	* @err_code: The error code of the exception that happened.
	172	* @remcom_in_buffer: The buffer of the packet we have read.
	173	* @remcom_out_buffer: The buffer of %BUFMAX bytes to write a packet into.
	174	* @regs: The &struct pt_regs of the current process.
	175	*
	176	* This function MUST handle the 'c' and 's' command packets,
	177	* as well packets to set / remove a hardware breakpoint, if used.
	178	* If there are additional packets which the hardware needs to handle,
	179	* they are handled here. The code should return -1 if it wants to
	180	* process more packets, and a %0 or %1 if it wants to exit from the
	181	* kgdb callback.
	182	*/
	183	extern int
	184	kgdb_arch_handle_exception(int vector, int signo, int err_code,
	185	char *remcom_in_buffer,
	186	char *remcom_out_buffer,
	187	struct pt_regs *regs);
	188
e3e2aaf7	189	/**
dc7d5527 JW	190	* kgdb_roundup_cpus - Get other CPUs into a holding pattern
	191	* @flags: Current IRQ state
	192	*
	193	* On SMP systems, we need to get the attention of the other CPUs
b11e1eca	194	* and get them into a known state. This should do what is needed
dc7d5527 JW	195	* to get the other CPUs to call kgdb_wait(). Note that on some arches,
	196	* the NMI approach is not used for rounding up all the CPUs. For example,
	197	* in case of MIPS, smp_call_function() is used to roundup CPUs. In
	198	* this case, we have to make sure that interrupts are enabled before
	199	* calling smp_call_function(). The argument to this function is
	200	* the flags that will be used when restoring the interrupts. There is
	201	* local_irq_save() call before kgdb_roundup_cpus().
	202	*
	203	* On non-SMP systems, this is not called.
	204	*/
	205	extern void kgdb_roundup_cpus(unsigned long flags);
	206
84c08fd6 JW	207	/**
	208	* kgdb_arch_set_pc - Generic call back to the program counter
	209	* @regs: Current &struct pt_regs.
	210	* @pc: The new value for the program counter
	211	*
	212	* This function handles updating the program counter and requires an
	213	* architecture specific implementation.
	214	*/
	215	extern void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc);
	216
	217
dc7d5527 JW	218	/* Optional functions. */
	219	extern int kgdb_validate_break_address(unsigned long addr);
	220	extern int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr);
	221	extern int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle);
	222
0b4b3827 JW	223	/**
	224	* kgdb_arch_late - Perform any architecture specific initalization.
	225	*
	226	* This function will handle the late initalization of any
	227	* architecture specific callbacks. This is an optional function for
	228	* handling things like late initialization of hw breakpoints. The
	229	* default implementation does nothing.
	230	*/
	231	extern void kgdb_arch_late(void);
	232
	233
e3e2aaf7	234	/**
dc7d5527 JW	235	* struct kgdb_arch - Describe architecture specific values.
	236	* @gdb_bpt_instr: The instruction to trigger a breakpoint.
	237	* @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
	238	* @set_breakpoint: Allow an architecture to specify how to set a software
	239	* breakpoint.
	240	* @remove_breakpoint: Allow an architecture to specify how to remove a
	241	* software breakpoint.
	242	* @set_hw_breakpoint: Allow an architecture to specify how to set a hardware
	243	* breakpoint.
	244	* @remove_hw_breakpoint: Allow an architecture to specify how to remove a
	245	* hardware breakpoint.
	246	* @remove_all_hw_break: Allow an architecture to specify how to remove all
	247	* hardware breakpoints.
	248	* @correct_hw_break: Allow an architecture to specify how to correct the
	249	* hardware debug registers.
	250	*/
	251	struct kgdb_arch {
	252	unsigned char gdb_bpt_instr[BREAK_INSTR_SIZE];
	253	unsigned long flags;
	254
	255	int (set_breakpoint)(unsigned long, char );
	256	int (remove_breakpoint)(unsigned long, char );
	257	int (*set_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
	258	int (*remove_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
	259	void (*remove_all_hw_break)(void);
	260	void (*correct_hw_break)(void);
	261	};
	262
e3e2aaf7	263	/**
dc7d5527 JW	264	* struct kgdb_io - Describe the interface for an I/O driver to talk with KGDB.
	265	* @name: Name of the I/O driver.
	266	* @read_char: Pointer to a function that will return one char.
	267	* @write_char: Pointer to a function that will write one char.
	268	* @flush: Pointer to a function that will flush any pending writes.
	269	* @init: Pointer to a function that will initialize the device.
	270	* @pre_exception: Pointer to a function that will do any prep work for
	271	* the I/O driver.
	272	* @post_exception: Pointer to a function that will do any cleanup work
	273	* for the I/O driver.
efe2f29e JW	274	* @is_console: 1 if the end device is a console 0 if the I/O device is
efe2f29e JW	275	* not a console
dc7d5527 JW	276	*/
	277	struct kgdb_io {
	278	const char *name;
	279	int (*read_char) (void);
	280	void (*write_char) (u8);
	281	void (*flush) (void);
	282	int (*init) (void);
	283	void (*pre_exception) (void);
	284	void (*post_exception) (void);
efe2f29e	285	int is_console;
dc7d5527 JW	286	};
	287
	288	extern struct kgdb_arch arch_kgdb_ops;
	289
688b744d HH	290	extern unsigned long __weak kgdb_arch_pc(int exception, struct pt_regs *regs);
688b744d HH	291
dc7d5527 JW	292	extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops);
dc7d5527 JW	293	extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops);
53197fc4	294	extern struct kgdb_io *dbg_io_ops;
dc7d5527	295
688b744d	296	extern int kgdb_hex2long(char *ptr, unsigned long long_val);
55751145	297	extern char kgdb_mem2hex(char mem, char *buf, int count);
dc7d5527 JW	298	extern int kgdb_hex2mem(char buf, char mem, int count);
	299
	300	extern int kgdb_isremovedbreak(unsigned long addr);
1cee5e35	301	extern void kgdb_schedule_breakpoint(void);
dc7d5527 JW	302
	303	extern int
	304	kgdb_handle_exception(int ex_vector, int signo, int err_code,
	305	struct pt_regs *regs);
	306	extern int kgdb_nmicallback(int cpu, void *regs);
	307
	308	extern int kgdb_single_step;
	309	extern atomic_t kgdb_active;
dcc78711 JW	310	#define in_dbg_master() \
dcc78711 JW	311	(raw_smp_processor_id() == atomic_read(&kgdb_active))
0b4b3827 JW	312	extern bool dbg_is_early;
0b4b3827 JW	313	extern void __init dbg_late_init(void);
dcc78711 JW	314	#else /* ! CONFIG_KGDB */
dcc78711 JW	315	#define in_dbg_master() (0)
0b4b3827	316	#define dbg_late_init()
dcc78711	317	#endif /* ! CONFIG_KGDB */
dc7d5527	318	#endif /* _KGDB_H_ */