projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 5d5314d6 JW |
1 | #ifndef _KDB_H |
| 2 | #define _KDB_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Kernel Debugger Architecture Independent Global Headers | |
| 6 | * | |
| 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 | |
| 9 | * for more details. | |
| 10 | * | |
| 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> | |
| 14 | */ | |
| 15 | ||
| 16 | #ifdef CONFIG_KGDB_KDB | |
| 17 | #include <linux/init.h> | |
| 18 | #include <linux/sched.h> | |
| 19 | #include <asm/atomic.h> | |
| 20 | ||
| 21 | #define KDB_POLL_FUNC_MAX 5 | |
| 22 | ||
| 23 | /* | |
| 24 | * kdb_initial_cpu is initialized to -1, and is set to the cpu | |
| 25 | * number whenever the kernel debugger is entered. | |
| 26 | */ | |
| 27 | extern int kdb_initial_cpu; | |
| 28 | extern atomic_t kdb_event; | |
| 29 | ||
| 30 | /* | |
| 31 | * kdb_diemsg | |
| 32 | * | |
| 33 | * Contains a pointer to the last string supplied to the | |
| 34 | * kernel 'die' panic function. | |
| 35 | */ | |
| 36 | extern const char *kdb_diemsg; | |
| 37 | ||
| 38 | #define KDB_FLAG_EARLYKDB (1 << 0) /* set from boot parameter kdb=early */ | |
| 39 | #define KDB_FLAG_CATASTROPHIC (1 << 1) /* A catastrophic event has occurred */ | |
| 40 | #define KDB_FLAG_CMD_INTERRUPT (1 << 2) /* Previous command was interrupted */ | |
| 41 | #define KDB_FLAG_NOIPI (1 << 3) /* Do not send IPIs */ | |
| 42 | #define KDB_FLAG_ONLY_DO_DUMP (1 << 4) /* Only do a dump, used when | |
| 43 | * kdb is off */ | |
| 44 | #define KDB_FLAG_NO_CONSOLE (1 << 5) /* No console is available, | |
| 45 | * kdb is disabled */ | |
| 46 | #define KDB_FLAG_NO_VT_CONSOLE (1 << 6) /* No VT console is available, do | |
| 47 | * not use keyboard */ | |
| 48 | #define KDB_FLAG_NO_I8042 (1 << 7) /* No i8042 chip is available, do | |
| 49 | * not use keyboard */ | |
| 50 | ||
| 51 | extern int kdb_flags; /* Global flags, see kdb_state for per cpu state */ | |
| 52 | ||
| 53 | extern void kdb_save_flags(void); | |
| 54 | extern void kdb_restore_flags(void); | |
| 55 | ||
| 56 | #define KDB_FLAG(flag) (kdb_flags & KDB_FLAG_##flag) | |
| 57 | #define KDB_FLAG_SET(flag) ((void)(kdb_flags |= KDB_FLAG_##flag)) | |
| 58 | #define KDB_FLAG_CLEAR(flag) ((void)(kdb_flags &= ~KDB_FLAG_##flag)) | |
| 59 | ||
| 60 | /* | |
| 61 | * External entry point for the kernel debugger. The pt_regs | |
| 62 | * at the time of entry are supplied along with the reason for | |
| 63 | * entry to the kernel debugger. | |
| 64 | */ | |
| 65 | ||
| 66 | typedef enum { | |
| 67 | KDB_REASON_ENTER = 1, /* KDB_ENTER() trap/fault - regs valid */ | |
| 68 | KDB_REASON_ENTER_SLAVE, /* KDB_ENTER_SLAVE() trap/fault - regs valid */ | |
| 69 | KDB_REASON_BREAK, /* Breakpoint inst. - regs valid */ | |
| 70 | KDB_REASON_DEBUG, /* Debug Fault - regs valid */ | |
| 71 | KDB_REASON_OOPS, /* Kernel Oops - regs valid */ | |
| 72 | KDB_REASON_SWITCH, /* CPU switch - regs valid*/ | |
| 73 | KDB_REASON_KEYBOARD, /* Keyboard entry - regs valid */ | |
| 74 | KDB_REASON_NMI, /* Non-maskable interrupt; regs valid */ | |
| 75 | KDB_REASON_RECURSE, /* Recursive entry to kdb; | |
| 76 | * regs probably valid */ | |
| 77 | KDB_REASON_SSTEP, /* Single Step trap. - regs valid */ | |
| 78 | } kdb_reason_t; | |
| 79 | ||
| 80 | extern int kdb_printf(const char *, ...) | |
| 81 | __attribute__ ((format (printf, 1, 2))); | |
| 82 | typedef int (*kdb_printf_t)(const char *, ...) | |
| 83 | __attribute__ ((format (printf, 1, 2))); | |
| 84 | ||
| 85 | extern void kdb_init(int level); | |
| 86 | ||
| 87 | /* Access to kdb specific polling devices */ | |
| 88 | typedef int (*get_char_func)(void); | |
| 89 | extern get_char_func kdb_poll_funcs[]; | |
| 90 | extern int kdb_get_kbd_char(void); | |
| 91 | ||
| 92 | static inline | |
| 93 | int kdb_process_cpu(const struct task_struct *p) | |
| 94 | { | |
| 95 | unsigned int cpu = task_thread_info(p)->cpu; | |
| 96 | if (cpu > num_possible_cpus()) | |
| 97 | cpu = 0; | |
| 98 | return cpu; | |
| 99 | } | |
| 100 | ||
| 101 | /* kdb access to register set for stack dumping */ | |
| 102 | extern struct pt_regs *kdb_current_regs; | |
| 103 | ||
| 104 | #else /* ! CONFIG_KGDB_KDB */ | |
| 105 | #define kdb_printf(...) | |
| 106 | #define kdb_init(x) | |
| 107 | #endif /* CONFIG_KGDB_KDB */ | |
| 108 | enum { | |
| 109 | KDB_NOT_INITIALIZED, | |
| 110 | KDB_INIT_EARLY, | |
| 111 | KDB_INIT_FULL, | |
| 112 | }; | |
| 113 | #endif /* !_KDB_H */ |