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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/linux/unwind.h
1 #ifndef _LINUX_UNWIND_H
2 #define _LINUX_UNWIND_H
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.
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.
17 #ifdef CONFIG_STACK_UNWIND
19 #include <asm/unwind.h>
21 #ifndef ARCH_UNWIND_SECTION_NAME
22 #define ARCH_UNWIND_SECTION_NAME ".eh_frame"
26 * Initialize unwind support.
28 extern void unwind_init(void);
32 extern void *unwind_add_table(struct module
*,
33 const void *table_start
,
34 unsigned long table_size
);
36 extern void unwind_remove_table(void *handle
, int init_only
);
40 extern int unwind_init_frame_info(struct unwind_frame_info
*,
42 /*const*/ struct pt_regs
*);
45 * Prepare to unwind a blocked task.
47 extern int unwind_init_blocked(struct unwind_frame_info
*,
48 struct task_struct
*);
51 * Prepare to unwind the currently running thread.
53 extern int unwind_init_running(struct unwind_frame_info
*,
54 asmlinkage
int (*callback
)(struct unwind_frame_info
*,
59 * Unwind to previous to frame. Returns 0 if successful, negative
60 * number in case of an error.
62 extern int unwind(struct unwind_frame_info
*);
65 * Unwind until the return pointer is in user-land (or until an error
66 * occurs). Returns 0 if successful, negative number in case of
69 extern int unwind_to_user(struct unwind_frame_info
*);
73 struct unwind_frame_info
{};
75 static inline void unwind_init(void) {}
79 static inline void *unwind_add_table(struct module
*mod
,
80 const void *table_start
,
81 unsigned long table_size
)
88 static inline void unwind_remove_table(void *handle
, int init_only
)
92 static inline int unwind_init_frame_info(struct unwind_frame_info
*info
,
93 struct task_struct
*tsk
,
94 const struct pt_regs
*regs
)
99 static inline int unwind_init_blocked(struct unwind_frame_info
*info
,
100 struct task_struct
*tsk
)
105 static inline int unwind_init_running(struct unwind_frame_info
*info
,
106 asmlinkage
int (*cb
)(struct unwind_frame_info
*,
113 static inline int unwind(struct unwind_frame_info
*info
)
118 static inline int unwind_to_user(struct unwind_frame_info
*info
)
125 #endif /* _LINUX_UNWIND_H */