mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 12:39:23 +00:00
d37d39ae3b
Certain calls from the kdb shell will call out to printk(), and any of these calls should get vectored back to the kdb_printf() so that the kdb pager and processing can be used, as well as to properly channel I/O to the polled I/O devices. CC: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Andrew Morton <akpm@linux-foundation.org>
118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
#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>
|
|
*/
|
|
|
|
#ifdef CONFIG_KGDB_KDB
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/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;
|
|
extern atomic_t kdb_event;
|
|
|
|
/*
|
|
* 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_ONLY_DO_DUMP (1 << 4) /* Only do a dump, used when
|
|
* kdb is off */
|
|
#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 int kdb_flags; /* Global flags, see kdb_state for per cpu state */
|
|
|
|
extern void kdb_save_flags(void);
|
|
extern void kdb_restore_flags(void);
|
|
|
|
#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_t;
|
|
|
|
extern int kdb_trap_printk;
|
|
extern int vkdb_printf(const char *fmt, va_list args)
|
|
__attribute__ ((format (printf, 1, 0)));
|
|
extern int kdb_printf(const char *, ...)
|
|
__attribute__ ((format (printf, 1, 2)));
|
|
typedef int (*kdb_printf_t)(const char *, ...)
|
|
__attribute__ ((format (printf, 1, 2)));
|
|
|
|
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_thread_info(p)->cpu;
|
|
if (cpu > num_possible_cpus())
|
|
cpu = 0;
|
|
return cpu;
|
|
}
|
|
|
|
/* kdb access to register set for stack dumping */
|
|
extern struct pt_regs *kdb_current_regs;
|
|
|
|
#else /* ! CONFIG_KGDB_KDB */
|
|
#define kdb_printf(...)
|
|
#define kdb_init(x)
|
|
#endif /* CONFIG_KGDB_KDB */
|
|
enum {
|
|
KDB_NOT_INITIALIZED,
|
|
KDB_INIT_EARLY,
|
|
KDB_INIT_FULL,
|
|
};
|
|
#endif /* !_KDB_H */
|