LXR linux/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
  15struct module;
  16
  17struct unwind_frame_info {};
  18
  19static inline void unwind_init(void) {}
  20static inline void unwind_setup(void) {}
  21
  22#ifdef CONFIG_MODULES
  23
  24static inline void *unwind_add_table(struct module *mod,
  25                                     const void *table_start,
  26                                     unsigned long table_size)
  27{
  28        return NULL;
  29}
  30
  31static inline void unwind_remove_table(void *handle, int init_only)
  32{
  33}
  34
  35#endif
  36
  37static 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
  44static inline int unwind_init_blocked(struct unwind_frame_info *info,
  45                                      struct task_struct *tsk)
  46{
  47        return -ENOSYS;
  48}
  49
  50static 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
  58static inline int unwind(struct unwind_frame_info *info)
  59{
  60        return -ENOSYS;
  61}
  62
  63static inline int unwind_to_user(struct unwind_frame_info *info)
  64{
  65        return -ENOSYS;
  66}
  67
  68#endif /* _LINUX_UNWIND_H */
  69