include/linux/unwind.h

   1 #ifndef _LINUX_UNWIND_H
   2 #define _LINUX_UNWIND_H
   3
   4 /*
   5  * Copyright (C) 2002-2006 Novell, Inc.
   6  *      Jan Beulich <jbeulich@novell.com>
   7  * This code is released under version 2 of the GNU GPL.
   8  *
   9  * A simple API for unwinding kernel stacks.  This is used for
  10  * debugging and error reporting purposes.  The kernel doesn't need
  11  * full-blown stack unwinding with all the bells and whistles, so there
  12  * is not much point in implementing the full Dwarf2 unwind API.
  13  */
  14
  15 struct module;
  16
  17 struct unwind_frame_info {};
  18
  19 static inline void unwind_init(void) {}
  20 static inline void unwind_setup(void) {}
  21
  22 #ifdef CONFIG_MODULES
  23
  24 static inline void *unwind_add_table(struct module *mod,
  25                                      const void *table_start,
  26                                      unsigned long table_size)
  27 {
  28         return NULL;
  29 }
  30
  31 static inline void unwind_remove_table(void *handle, int init_only)
  32 {
  33 }
  34
  35 #endif
  36
  37 static inline int unwind_init_frame_info(struct unwind_frame_info *info,
  38                                          struct task_struct *tsk,
  39                                          const struct pt_regs *regs)
  40 {
  41         return -ENOSYS;
  42 }
  43
  44 static inline int unwind_init_blocked(struct unwind_frame_info *info,
  45                                       struct task_struct *tsk)
  46 {
  47         return -ENOSYS;
  48 }
  49
  50 static inline int unwind_init_running(struct unwind_frame_info *info,
  51                                       asmlinkage int (*cb)(struct unwind_frame_info *,
  52                                                            void *arg),
  53                                       void *arg)
  54 {
  55         return -ENOSYS;
  56 }
  57
  58 static inline int unwind(struct unwind_frame_info *info)
  59 {
  60         return -ENOSYS;
  61 }
  62
  63 static inline int unwind_to_user(struct unwind_frame_info *info)
  64 {
  65         return -ENOSYS;
  66 }
  67
  68 #endif /* _LINUX_UNWIND_H */