1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_FRAME_H
 3#define _ASM_X86_FRAME_H
 4
 5#include <asm/asm.h>
 
 6
 7/*
 8 * These are stack frame creation macros.  They should be used by every
 9 * callable non-leaf asm function to make kernel stack traces more reliable.
10 */
11
12#ifdef CONFIG_FRAME_POINTER
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
13
14#ifdef __ASSEMBLY__
15
16.macro FRAME_BEGIN
17	push %_ASM_BP
18	_ASM_MOV %_ASM_SP, %_ASM_BP
19.endm
20
21.macro FRAME_END
22	pop %_ASM_BP
23.endm
24
25#else /* !__ASSEMBLY__ */
26
27#define FRAME_BEGIN				\
28	"push %" _ASM_BP "\n"			\
29	_ASM_MOV "%" _ASM_SP ", %" _ASM_BP "\n"
30
31#define FRAME_END "pop %" _ASM_BP "\n"
32
33#endif /* __ASSEMBLY__ */
34
35#define FRAME_OFFSET __ASM_SEL(4, 8)
36
37#else /* !CONFIG_FRAME_POINTER */
38
39#define FRAME_BEGIN
40#define FRAME_END
41#define FRAME_OFFSET 0
42
43#endif /* CONFIG_FRAME_POINTER */
44
45#endif /* _ASM_X86_FRAME_H */

 1#ifdef __ASSEMBLY__
 
 
 2
 3#include <asm/asm.h>
 4#include <asm/dwarf2.h>
 5
 6/* The annotation hides the frame from the unwinder and makes it look
 7   like a ordinary ebp save/restore. This avoids some special cases for
 8   frame pointer later */
 
 
 9#ifdef CONFIG_FRAME_POINTER
10	.macro FRAME
11	__ASM_SIZE(push,_cfi)	%__ASM_REG(bp)
12	CFI_REL_OFFSET		__ASM_REG(bp), 0
13	__ASM_SIZE(mov)		%__ASM_REG(sp), %__ASM_REG(bp)
14	.endm
15	.macro ENDFRAME
16	__ASM_SIZE(pop,_cfi)	%__ASM_REG(bp)
17	CFI_RESTORE		__ASM_REG(bp)
18	.endm
19#else
20	.macro FRAME
21	.endm
22	.macro ENDFRAME
23	.endm
24#endif
25
26#endif  /*  __ASSEMBLY__  */