| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |