5 * Kernel Debugger Architecture Independent Global Headers
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file "COPYING" in the main directory of this archive
11 * Copyright (c) 2000-2007 Silicon Graphics, Inc. All Rights Reserved.
12 * Copyright (C) 2000 Stephane Eranian <eranian@hpl.hp.com>
13 * Copyright (C) 2009 Jason Wessel <jason.wessel@windriver.com>
17 KDB_REPEAT_NONE
= 0, /* Do not repeat this command */
18 KDB_REPEAT_NO_ARGS
, /* Repeat the command without arguments */
19 KDB_REPEAT_WITH_ARGS
, /* Repeat the command including its arguments */
22 typedef int (*kdb_func_t
)(int, const char **);
24 #ifdef CONFIG_KGDB_KDB
25 #include <linux/init.h>
26 #include <linux/sched.h>
27 #include <linux/atomic.h>
29 #define KDB_POLL_FUNC_MAX 5
30 extern int kdb_poll_idx
;
33 * kdb_initial_cpu is initialized to -1, and is set to the cpu
34 * number whenever the kernel debugger is entered.
36 extern int kdb_initial_cpu
;
37 extern atomic_t kdb_event
;
39 /* Types and messages used for dynamically added kdb shell commands */
41 #define KDB_MAXARGS 16 /* Maximum number of arguments to a function */
43 /* KDB return codes from a command or internal kdb function */
44 #define KDB_NOTFOUND (-1)
45 #define KDB_ARGCOUNT (-2)
46 #define KDB_BADWIDTH (-3)
47 #define KDB_BADRADIX (-4)
48 #define KDB_NOTENV (-5)
49 #define KDB_NOENVVALUE (-6)
50 #define KDB_NOTIMP (-7)
51 #define KDB_ENVFULL (-8)
52 #define KDB_ENVBUFFULL (-9)
53 #define KDB_TOOMANYBPT (-10)
54 #define KDB_TOOMANYDBREGS (-11)
55 #define KDB_DUPBPT (-12)
56 #define KDB_BPTNOTFOUND (-13)
57 #define KDB_BADMODE (-14)
58 #define KDB_BADINT (-15)
59 #define KDB_INVADDRFMT (-16)
60 #define KDB_BADREG (-17)
61 #define KDB_BADCPUNUM (-18)
62 #define KDB_BADLENGTH (-19)
63 #define KDB_NOBP (-20)
64 #define KDB_BADADDR (-21)
69 * Contains a pointer to the last string supplied to the
70 * kernel 'die' panic function.
72 extern const char *kdb_diemsg
;
74 #define KDB_FLAG_EARLYKDB (1 << 0) /* set from boot parameter kdb=early */
75 #define KDB_FLAG_CATASTROPHIC (1 << 1) /* A catastrophic event has occurred */
76 #define KDB_FLAG_CMD_INTERRUPT (1 << 2) /* Previous command was interrupted */
77 #define KDB_FLAG_NOIPI (1 << 3) /* Do not send IPIs */
78 #define KDB_FLAG_NO_CONSOLE (1 << 5) /* No console is available,
80 #define KDB_FLAG_NO_VT_CONSOLE (1 << 6) /* No VT console is available, do
82 #define KDB_FLAG_NO_I8042 (1 << 7) /* No i8042 chip is available, do
85 extern int kdb_flags
; /* Global flags, see kdb_state for per cpu state */
87 DECLARE_PER_CPU(int, kdb_in_use
); /* Indicate if in kdb mode or not */
88 extern int check_timeout
; /* If user press any key in kdb, do not check timeout */
89 extern int force_panic
; /* Timeout and force kernel panic */
90 extern unsigned long long enter_time
; /* keep the time of entering kdb */
91 #define KE_TIMEOUT_SEC 120 /* default value : 120 seconds timeout */
92 extern int mtk_set_kgdboc_var(void);
95 extern void kdb_save_flags(void);
96 extern void kdb_restore_flags(void);
98 #define KDB_FLAG(flag) (kdb_flags & KDB_FLAG_##flag)
99 #define KDB_FLAG_SET(flag) ((void)(kdb_flags |= KDB_FLAG_##flag))
100 #define KDB_FLAG_CLEAR(flag) ((void)(kdb_flags &= ~KDB_FLAG_##flag))
103 * External entry point for the kernel debugger. The pt_regs
104 * at the time of entry are supplied along with the reason for
105 * entry to the kernel debugger.
109 KDB_REASON_ENTER
= 1, /* KDB_ENTER() trap/fault - regs valid */
110 KDB_REASON_ENTER_SLAVE
, /* KDB_ENTER_SLAVE() trap/fault - regs valid */
111 KDB_REASON_BREAK
, /* Breakpoint inst. - regs valid */
112 KDB_REASON_DEBUG
, /* Debug Fault - regs valid */
113 KDB_REASON_OOPS
, /* Kernel Oops - regs valid */
114 KDB_REASON_SWITCH
, /* CPU switch - regs valid*/
115 KDB_REASON_KEYBOARD
, /* Keyboard entry - regs valid */
116 KDB_REASON_NMI
, /* Non-maskable interrupt; regs valid */
117 KDB_REASON_RECURSE
, /* Recursive entry to kdb;
118 * regs probably valid */
119 KDB_REASON_SSTEP
, /* Single Step trap. - regs valid */
122 extern int kdb_trap_printk
;
123 extern __printf(1, 0) int vkdb_printf(const char *fmt
, va_list args
);
124 extern __printf(1, 2) int kdb_printf(const char *, ...);
125 typedef __printf(1, 2) int (*kdb_printf_t
)(const char *, ...);
127 extern void kdb_init(int level
);
129 /* Access to kdb specific polling devices */
130 typedef int (*get_char_func
)(void);
131 extern get_char_func kdb_poll_funcs
[];
132 extern int kdb_get_kbd_char(void);
135 int kdb_process_cpu(const struct task_struct
*p
)
137 unsigned int cpu
= task_thread_info(p
)->cpu
;
138 if (cpu
> num_possible_cpus())
143 /* kdb access to register set for stack dumping */
144 extern struct pt_regs
*kdb_current_regs
;
145 #ifdef CONFIG_KALLSYMS
146 extern const char *kdb_walk_kallsyms(loff_t
*pos
);
147 #else /* ! CONFIG_KALLSYMS */
148 static inline const char *kdb_walk_kallsyms(loff_t
*pos
)
152 #endif /* ! CONFIG_KALLSYMS */
154 /* Dynamic kdb shell command registration */
155 extern int kdb_register(char *, kdb_func_t
, char *, char *, short);
156 extern int kdb_register_repeat(char *, kdb_func_t
, char *, char *,
157 short, kdb_repeat_t
);
158 extern int kdb_unregister(char *);
159 #else /* ! CONFIG_KGDB_KDB */
160 static inline __printf(1, 2) int kdb_printf(const char *fmt
, ...) { return 0; }
161 static inline void kdb_init(int level
) {}
162 static inline int kdb_register(char *cmd
, kdb_func_t func
, char *usage
,
163 char *help
, short minlen
) { return 0; }
164 static inline int kdb_register_repeat(char *cmd
, kdb_func_t func
, char *usage
,
165 char *help
, short minlen
,
166 kdb_repeat_t repeat
) { return 0; }
167 static inline int kdb_unregister(char *cmd
) { return 0; }
168 #endif /* CONFIG_KGDB_KDB */
175 extern int kdbgetintenv(const char *, int *);
176 extern int kdb_set(int, const char **);