diff options
| author | Zong Li <zong@andestech.com> | 2018-08-15 10:45:59 +0800 |
|---|---|---|
| committer | Greentime Hu <greentime@andestech.com> | 2018-09-04 14:45:17 +0800 |
| commit | a18082575c664847d36c6ca030b09ce8d93aec2f (patch) | |
| tree | 96070f10fadd478d6f644d639b899d9bb9311650 /arch/nds32/include/asm/ftrace.h | |
| parent | 487913ab18c215b06611c4c91c7e905fc0960eb8 (diff) | |
| download | linux-a18082575c664847d36c6ca030b09ce8d93aec2f.tar.gz | |
nds32/ftrace: Support static function tracer
This patch support the static function tracer. On nds32 ABI, we need to
always push return address to stack for __builtin_return_address can
work correctly, otherwise, it will get the wrong value of $lp at leaf
function.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Diffstat (limited to 'arch/nds32/include/asm/ftrace.h')
| -rw-r--r-- | arch/nds32/include/asm/ftrace.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/nds32/include/asm/ftrace.h b/arch/nds32/include/asm/ftrace.h new file mode 100644 index 000000000000..bac7657f576a --- /dev/null +++ b/arch/nds32/include/asm/ftrace.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_NDS32_FTRACE_H +#define __ASM_NDS32_FTRACE_H + +#ifdef CONFIG_FUNCTION_TRACER + +#define HAVE_FUNCTION_GRAPH_FP_TEST + +#define MCOUNT_ADDR ((unsigned long)(_mcount)) +/* mcount call is composed of three instructions: + * sethi + ori + jral + */ +#define MCOUNT_INSN_SIZE 12 + +extern void _mcount(unsigned long parent_ip); + +#endif /* CONFIG_FUNCTION_TRACER */ + +#endif /* __ASM_NDS32_FTRACE_H */ |