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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/kernel/debug/debug_core.h
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/*

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 * Created by: Jason Wessel <[email protected]>

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 *

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

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 *

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

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

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 * warranty of any kind, whether express or implied.

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 */

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#ifndef _DEBUG_CORE_H_

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#define _DEBUG_CORE_H_

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/*

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 * These are the private implementation headers between the kernel

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 * debugger core and the debugger front end code.

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 */

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/* kernel debug core data structures */

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struct kgdb_state {

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	int			ex_vector;

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	int			signo;

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	int			err_code;

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	int			cpu;

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	int			pass_exception;

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	unsigned long		thr_query;

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	unsigned long		threadid;

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	long			kgdb_usethreadid;

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	struct pt_regs		*linux_regs;

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	atomic_t		*send_ready;

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};

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/* Exception state values */

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

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

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

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#define DCPU_WANT_BT     0x8 /* Slave cpu should backtrace then clear flag */

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struct debuggerinfo_struct {

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	void			*debuggerinfo;

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	struct task_struct	*task;

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	int			exception_state;

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	int			ret_state;

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	int			irq_depth;

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	int			enter_kgdb;

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	bool			rounding_up;

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};

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extern struct debuggerinfo_struct kgdb_info[];

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/* kernel debug core break point routines */

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extern int dbg_remove_all_break(void);

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extern int dbg_set_sw_break(unsigned long addr);

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extern int dbg_remove_sw_break(unsigned long addr);

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extern int dbg_activate_sw_breakpoints(void);

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extern int dbg_deactivate_sw_breakpoints(void);

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/* polled character access to i/o module */

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extern int dbg_io_get_char(void);

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/* stub return value for switching between the gdbstub and kdb */

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#define DBG_PASS_EVENT -12345

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/* Switch from one cpu to another */

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#define DBG_SWITCH_CPU_EVENT -123456

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extern int dbg_switch_cpu;

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/* gdbstub interface functions */

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extern int gdb_serial_stub(struct kgdb_state *ks);

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

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/* gdbstub functions used for kdb <-> gdbstub transition */

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extern int gdbstub_state(struct kgdb_state *ks, char *cmd);

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extern int dbg_kdb_mode;

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#ifdef CONFIG_KGDB_KDB

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extern int kdb_stub(struct kgdb_state *ks);

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extern int kdb_parse(const char *cmdstr);

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extern int kdb_common_init_state(struct kgdb_state *ks);

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extern int kdb_common_deinit_state(void);

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extern void kdb_dump_stack_on_cpu(int cpu);

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#else /* ! CONFIG_KGDB_KDB */

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static inline int kdb_stub(struct kgdb_state *ks)

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{

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	return DBG_PASS_EVENT;

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}

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#endif /* CONFIG_KGDB_KDB */

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#endif /* _DEBUG_CORE_H_ */

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