projects/linux·blob 9b6c4ea9 · refs

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1/*
2 * Created by: Jason Wessel <[email protected]>
3 *
4 * Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved.
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10
11#ifndef _DEBUG_CORE_H_
12#define _DEBUG_CORE_H_
13/*
14 * These are the private implementation headers between the kernel
15 * debugger core and the debugger front end code.
16 */
17
18/* kernel debug core data structures */
19struct kgdb_state {
20 int ex_vector;
21 int signo;
22 int err_code;
23 int cpu;
24 int pass_exception;
25 unsigned long thr_query;
26 unsigned long threadid;
27 long kgdb_usethreadid;
28 struct pt_regs *linux_regs;
29 atomic_t *send_ready;
30};
31
32/* Exception state values */
33#define DCPU_WANT_MASTER 0x1 /* Waiting to become a master kgdb cpu */
34#define DCPU_NEXT_MASTER 0x2 /* Transition from one master cpu to another */
35#define DCPU_IS_SLAVE 0x4 /* Slave cpu enter exception */
36#define DCPU_SSTEP 0x8 /* CPU is single stepping */
37
38struct debuggerinfo_struct {
39 void *debuggerinfo;
40 struct task_struct *task;
41 int exception_state;
42 int ret_state;
43 int irq_depth;
44 int enter_kgdb;
45};
46
47extern struct debuggerinfo_struct kgdb_info[];
48
49/* kernel debug core break point routines */
50extern int dbg_remove_all_break(void);
51extern int dbg_set_sw_break(unsigned long addr);
52extern int dbg_remove_sw_break(unsigned long addr);
53extern int dbg_activate_sw_breakpoints(void);
54extern int dbg_deactivate_sw_breakpoints(void);
55
56/* polled character access to i/o module */
57extern int dbg_io_get_char(void);
58
59/* stub return value for switching between the gdbstub and kdb */
60#define DBG_PASS_EVENT -12345
61/* Switch from one cpu to another */
62#define DBG_SWITCH_CPU_EVENT -123456
63extern int dbg_switch_cpu;
64
65/* gdbstub interface functions */
66extern int gdb_serial_stub(struct kgdb_state *ks);
67extern void gdbstub_msg_write(const char *s, int len);
68
69/* gdbstub functions used for kdb <-> gdbstub transition */
70extern int gdbstub_state(struct kgdb_state *ks, char *cmd);
71extern int dbg_kdb_mode;
72
73#ifdef CONFIG_KGDB_KDB
74extern int kdb_stub(struct kgdb_state *ks);
75extern int kdb_parse(const char *cmdstr);
76extern int kdb_common_init_state(struct kgdb_state *ks);
77extern int kdb_common_deinit_state(void);
78#define KGDB_KDB_REASON_SYSTEM_NMI KDB_REASON_SYSTEM_NMI
79#else /* ! CONFIG_KGDB_KDB */
80static inline int kdb_stub(struct kgdb_state *ks)
81{
82 return DBG_PASS_EVENT;
83}
84#define KGDB_KDB_REASON_SYSTEM_NMI 0
85#endif /* CONFIG_KGDB_KDB */
86
87#endif /* _DEBUG_CORE_H_ */