#ifndef _KDB_H
#define _KDB_H
/*
* Kernel Debugger Architecture Independent Global Headers
*
* This file is subject to the terms and conditions of the GNU General Public
* License . See the file " COPYING " in the main directory of this archive
* for more details .
*
* Copyright ( c ) 2000 - 2007 Silicon Graphics , Inc . All Rights Reserved .
* Copyright ( C ) 2000 Stephane Eranian < eranian @ hpl . hp . com >
* Copyright ( C ) 2009 Jason Wessel < jason . wessel @ windriver . com >
*/
#include <linux/list.h>
/* Shifted versions of the command enable bits are be used if the command
* has no arguments ( see kdb_check_flags ) . This allows commands , such as
* go , to have different permissions depending upon whether it is called
* with an argument .
*/
#define KDB_ENABLE_NO_ARGS_SHIFT 10
typedef enum {
KDB_ENABLE_ALL = (1 << 0 ), /* Enable everything */
KDB_ENABLE_MEM_READ = (1 << 1 ),
KDB_ENABLE_MEM_WRITE = (1 << 2 ),
KDB_ENABLE_REG_READ = (1 << 3 ),
KDB_ENABLE_REG_WRITE = (1 << 4 ),
KDB_ENABLE_INSPECT = (1 << 5 ),
KDB_ENABLE_FLOW_CTRL = (1 << 6 ),
KDB_ENABLE_SIGNAL = (1 << 7 ),
KDB_ENABLE_REBOOT = (1 << 8 ),
/* User exposed values stop here, all remaining flags are
* exclusively used to describe a commands behaviour .
*/
KDB_ENABLE_ALWAYS_SAFE = (1 << 9 ),
KDB_ENABLE_MASK = (1 << KDB_ENABLE_NO_ARGS_SHIFT) - 1 ,
KDB_ENABLE_ALL_NO_ARGS = KDB_ENABLE_ALL << KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_MEM_READ_NO_ARGS = KDB_ENABLE_MEM_READ
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_MEM_WRITE_NO_ARGS = KDB_ENABLE_MEM_WRITE
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_REG_READ_NO_ARGS = KDB_ENABLE_REG_READ
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_REG_WRITE_NO_ARGS = KDB_ENABLE_REG_WRITE
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_INSPECT_NO_ARGS = KDB_ENABLE_INSPECT
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_FLOW_CTRL_NO_ARGS = KDB_ENABLE_FLOW_CTRL
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_SIGNAL_NO_ARGS = KDB_ENABLE_SIGNAL
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_REBOOT_NO_ARGS = KDB_ENABLE_REBOOT
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_ALWAYS_SAFE_NO_ARGS = KDB_ENABLE_ALWAYS_SAFE
<< KDB_ENABLE_NO_ARGS_SHIFT,
KDB_ENABLE_MASK_NO_ARGS = KDB_ENABLE_MASK << KDB_ENABLE_NO_ARGS_SHIFT,
KDB_REPEAT_NO_ARGS = 0 x40000000, /* Repeat the command w/o arguments */
KDB_REPEAT_WITH_ARGS = 0 x80000000, /* Repeat the command with args */
} kdb_cmdflags_t;
typedef int (*kdb_func_t)(int , const char **);
/* The KDB shell command table */
typedef struct _kdbtab {
char *name; /* Command name */
kdb_func_t func; /* Function to execute command */
char *usage; /* Usage String for this command */
char *help; /* Help message for this command */
short minlen; /* Minimum legal # cmd chars required */
kdb_cmdflags_t flags; /* Command behaviour flags */
struct list_head list_node; /* Command list */
} kdbtab_t;
#ifdef CONFIG_KGDB_KDB
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/atomic.h>
#define KDB_POLL_FUNC_MAX 5
extern int kdb_poll_idx;
/*
* kdb_initial_cpu is initialized to - 1 , and is set to the cpu
* number whenever the kernel debugger is entered .
*/
extern int kdb_initial_cpu;
/* Types and messages used for dynamically added kdb shell commands */
#define KDB_MAXARGS 16 /* Maximum number of arguments to a function */
/* KDB return codes from a command or internal kdb function */
#define KDB_NOTFOUND (-1 )
#define KDB_ARGCOUNT (-2 )
#define KDB_BADWIDTH (-3 )
#define KDB_BADRADIX (-4 )
#define KDB_NOTENV (-5 )
#define KDB_NOENVVALUE (-6 )
#define KDB_NOTIMP (-7 )
#define KDB_ENVFULL (-8 )
#define KDB_KMALLOCFAILED (-9 )
#define KDB_TOOMANYBPT (-10 )
#define KDB_TOOMANYDBREGS (-11 )
#define KDB_DUPBPT (-12 )
#define KDB_BPTNOTFOUND (-13 )
#define KDB_BADMODE (-14 )
#define KDB_BADINT (-15 )
#define KDB_INVADDRFMT (-16 )
#define KDB_BADREG (-17 )
#define KDB_BADCPUNUM (-18 )
#define KDB_BADLENGTH (-19 )
#define KDB_NOBP (-20 )
#define KDB_BADADDR (-21 )
#define KDB_NOPERM (-22 )
/*
* kdb_diemsg
*
* Contains a pointer to the last string supplied to the
* kernel ' die ' panic function .
*/
extern const char *kdb_diemsg;
#define KDB_FLAG_EARLYKDB (1 << 0 ) /* set from boot parameter kdb=early */
#define KDB_FLAG_CATASTROPHIC (1 << 1 ) /* A catastrophic event has occurred */
#define KDB_FLAG_CMD_INTERRUPT (1 << 2 ) /* Previous command was interrupted */
#define KDB_FLAG_NOIPI (1 << 3 ) /* Do not send IPIs */
#define KDB_FLAG_NO_CONSOLE (1 << 5 ) /* No console is available,
* kdb is disabled */
#define KDB_FLAG_NO_VT_CONSOLE (1 << 6 ) /* No VT console is available, do
* not use keyboard */
#define KDB_FLAG_NO_I8042 (1 << 7 ) /* No i8042 chip is available, do
* not use keyboard */
extern unsigned int kdb_flags; /* Global flags, see kdb_state for per cpu state */
#define KDB_FLAG(flag) (kdb_flags & KDB_FLAG_## flag)
#define KDB_FLAG_SET(flag) ((void )(kdb_flags |= KDB_FLAG_## flag))
#define KDB_FLAG_CLEAR(flag) ((void )(kdb_flags &= ~KDB_FLAG_## flag))
/*
* External entry point for the kernel debugger . The pt_regs
* at the time of entry are supplied along with the reason for
* entry to the kernel debugger .
*/
typedef enum {
KDB_REASON_ENTER = 1 , /* KDB_ENTER() trap/fault - regs valid */
KDB_REASON_ENTER_SLAVE, /* KDB_ENTER_SLAVE() trap/fault - regs valid */
KDB_REASON_BREAK, /* Breakpoint inst. - regs valid */
KDB_REASON_DEBUG, /* Debug Fault - regs valid */
KDB_REASON_OOPS, /* Kernel Oops - regs valid */
KDB_REASON_SWITCH, /* CPU switch - regs valid*/
KDB_REASON_KEYBOARD, /* Keyboard entry - regs valid */
KDB_REASON_NMI, /* Non-maskable interrupt; regs valid */
KDB_REASON_RECURSE, /* Recursive entry to kdb;
* regs probably valid */
KDB_REASON_SSTEP, /* Single Step trap. - regs valid */
KDB_REASON_SYSTEM_NMI, /* In NMI due to SYSTEM cmd; regs valid */
} kdb_reason_t;
enum kdb_msgsrc {
KDB_MSGSRC_INTERNAL, /* direct call to kdb_printf() */
KDB_MSGSRC_PRINTK, /* trapped from printk() */
};
extern int kdb_trap_printk;
extern int kdb_printf_cpu;
extern __printf(2 , 0 ) int vkdb_printf(enum kdb_msgsrc src, const char *fmt,
va_list args);
extern __printf(1 , 2 ) int kdb_printf(const char *, ...);
typedef __printf(1 , 2 ) int (*kdb_printf_t)(const char *, ...);
extern void kdb_init(int level);
/* Access to kdb specific polling devices */
typedef int (*get_char_func)(void );
extern get_char_func kdb_poll_funcs[];
extern int kdb_get_kbd_char(void );
static inline
int kdb_process_cpu(const struct task_struct *p)
{
unsigned int cpu = task_cpu(p);
if (cpu > num_possible_cpus())
cpu = 0 ;
return cpu;
}
extern void kdb_send_sig(struct task_struct *p, int sig);
#ifdef CONFIG_KALLSYMS
extern const char *kdb_walk_kallsyms(loff_t *pos);
#else /* ! CONFIG_KALLSYMS */
static inline const char *kdb_walk_kallsyms(loff_t *pos)
{
return NULL;
}
#endif /* ! CONFIG_KALLSYMS */
/* Dynamic kdb shell command registration */
extern int kdb_register(kdbtab_t *cmd);
extern void kdb_unregister(kdbtab_t *cmd);
#else /* ! CONFIG_KGDB_KDB */
static inline __printf(1 , 2 ) int kdb_printf(const char *fmt, ...) { return 0 ; }
static inline void kdb_init(int level) {}
static inline int kdb_register(kdbtab_t *cmd) { return 0 ; }
static inline void kdb_unregister(kdbtab_t *cmd) {}
#endif /* CONFIG_KGDB_KDB */
enum {
KDB_NOT_INITIALIZED,
KDB_INIT_EARLY,
KDB_INIT_FULL,
};
extern int kdbgetintenv(const char *, int *);
extern int kdb_set(int , const char **);
int kdb_lsmod(int argc, const char **argv);
#endif /* !_KDB_H */
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