| #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 = 0x40000000, /* Repeat the command w/o arguments */ |
| KDB_REPEAT_WITH_ARGS = 0x80000000, /* 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_ENVBUFFULL (-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 */ |
| |
| 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_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; |
| } |
| |
| #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 **); |
| |
| #endif /* !_KDB_H */ |