blob: 453a4f4ef39d441d1e047b2a06e6700bf1e51b21 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_OBJTOOL_TYPES_H
#define _LINUX_OBJTOOL_TYPES_H
#ifndef __ASSEMBLY__
#include <linux/types.h>
/*
* This struct is used by asm and inline asm code to manually annotate the
* location of registers on the stack.
*/
struct unwind_hint {
u32 ip;
s16 sp_offset;
u8 sp_reg;
u8 type;
u8 signal;
};
#endif /* __ASSEMBLY__ */
/*
* UNWIND_HINT_TYPE_UNDEFINED: A blind spot in ORC coverage which can result in
* a truncated and unreliable stack unwind.
*
* UNWIND_HINT_TYPE_END_OF_STACK: The end of the kernel stack unwind before
* hitting user entry, boot code, or fork entry (when there are no pt_regs
* available).
*
* UNWIND_HINT_TYPE_CALL: Indicates that sp_reg+sp_offset resolves to PREV_SP
* (the caller's SP right before it made the call). Used for all callable
* functions, i.e. all C code and all callable asm functions.
*
* UNWIND_HINT_TYPE_REGS: Used in entry code to indicate that sp_reg+sp_offset
* points to a fully populated pt_regs from a syscall, interrupt, or exception.
*
* UNWIND_HINT_TYPE_REGS_PARTIAL: Used in entry code to indicate that
* sp_reg+sp_offset points to the iret return frame.
*
* UNWIND_HINT_TYPE_FUNC: Generate the unwind metadata of a callable function.
* Useful for code which doesn't have an ELF function annotation.
*
* UNWIND_HINT_TYPE_{SAVE,RESTORE}: Save the unwind metadata at a certain
* location so that it can be restored later.
*/
#define UNWIND_HINT_TYPE_UNDEFINED 0
#define UNWIND_HINT_TYPE_END_OF_STACK 1
#define UNWIND_HINT_TYPE_CALL 2
#define UNWIND_HINT_TYPE_REGS 3
#define UNWIND_HINT_TYPE_REGS_PARTIAL 4
/* The below hint types don't have corresponding ORC types */
#define UNWIND_HINT_TYPE_FUNC 5
#define UNWIND_HINT_TYPE_SAVE 6
#define UNWIND_HINT_TYPE_RESTORE 7
#endif /* _LINUX_OBJTOOL_TYPES_H */
|
