diff options
Diffstat (limited to 'include/linux/kdb.h')
| -rw-r--r-- | include/linux/kdb.h | 55 |
1 files changed, 38 insertions, 17 deletions
diff --git a/include/linux/kdb.h b/include/linux/kdb.h index 68bd88223417..741c58e86431 100644 --- a/include/linux/kdb.h +++ b/include/linux/kdb.h @@ -13,6 +13,9 @@ * Copyright (C) 2009 Jason Wessel <jason.wessel@windriver.com> */ +#include <linux/list.h> +#include <linux/smp.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 @@ -64,6 +67,17 @@ typedef enum { 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> @@ -91,7 +105,7 @@ extern int kdb_initial_cpu; #define KDB_NOENVVALUE (-6) #define KDB_NOTIMP (-7) #define KDB_ENVFULL (-8) -#define KDB_ENVBUFFULL (-9) +#define KDB_KMALLOCFAILED (-9) #define KDB_TOOMANYBPT (-10) #define KDB_TOOMANYDBREGS (-11) #define KDB_DUPBPT (-12) @@ -125,10 +139,7 @@ extern const char *kdb_diemsg; #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); +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)) @@ -183,8 +194,8 @@ int kdb_process_cpu(const struct task_struct *p) return cpu; } -/* kdb access to register set for stack dumping */ -extern struct pt_regs *kdb_current_regs; +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 */ @@ -195,19 +206,28 @@ static inline const char *kdb_walk_kallsyms(loff_t *pos) #endif /* ! CONFIG_KALLSYMS */ /* Dynamic kdb shell command registration */ -extern int kdb_register(char *, kdb_func_t, char *, char *, short); -extern int kdb_register_flags(char *, kdb_func_t, char *, char *, - short, kdb_cmdflags_t); -extern int kdb_unregister(char *); +extern int kdb_register(kdbtab_t *cmd); +extern void kdb_unregister(kdbtab_t *cmd); + +/* Return true when KDB as locked for printing a message on this CPU. */ +static inline +bool kdb_printf_on_this_cpu(void) +{ + /* + * We can use raw_smp_processor_id() here because the task could + * not get migrated when KDB has locked for printing on this CPU. + */ + return unlikely(READ_ONCE(kdb_printf_cpu) == raw_smp_processor_id()); +} + #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(char *cmd, kdb_func_t func, char *usage, - char *help, short minlen) { return 0; } -static inline int kdb_register_flags(char *cmd, kdb_func_t func, char *usage, - char *help, short minlen, - kdb_cmdflags_t flags) { return 0; } -static inline int kdb_unregister(char *cmd) { return 0; } +static inline int kdb_register(kdbtab_t *cmd) { return 0; } +static inline void kdb_unregister(kdbtab_t *cmd) {} + +static inline bool kdb_printf_on_this_cpu(void) { return false; } + #endif /* CONFIG_KGDB_KDB */ enum { KDB_NOT_INITIALIZED, @@ -217,5 +237,6 @@ enum { extern int kdbgetintenv(const char *, int *); extern int kdb_set(int, const char **); +int kdb_lsmod(int argc, const char **argv); #endif /* !_KDB_H */ |