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