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| author |  Qing Zhang <zhangqing@loongson.cn>
| 2022-12-10 22:40:16 +0800 |
|---|---|---|
| committer |  Huacai Chen <chenhuacai@loongson.cn>
| 2022-12-14 08:41:53 +0800 |
| commit | ac7127e1cc65aeb578998c992a05dbc80fa18f0f (patch) | |
| tree | 3cc8f20d43cf9a78558dfe799d3b4fe1bcad6fec /arch/loongarch/include | |
| parent | LoongArch/ftrace: Add HAVE_DYNAMIC_FTRACE_WITH_REGS support (diff) | |
| download | linux-ac7127e1cc65aeb578998c992a05dbc80fa18f0f.tar.gz linux-ac7127e1cc65aeb578998c992a05dbc80fa18f0f.tar.bz2 linux-ac7127e1cc65aeb578998c992a05dbc80fa18f0f.zip | |
LoongArch/ftrace: Add HAVE_DYNAMIC_FTRACE_WITH_ARGS support
Allow for arguments to be passed in to ftrace_regs by default. If this
is set, then arguments and stack can be found from the pt_regs.
1. HAVE_DYNAMIC_FTRACE_WITH_ARGS don't need special hook for graph
tracer entry point, but instead we can use graph_ops::func function to
install the return_hooker.
2. Livepatch requires this option in the future.
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include')
| -rw-r--r-- | arch/loongarch/include/asm/ftrace.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/ftrace.h b/arch/loongarch/include/asm/ftrace.h index dd4a0c8efd24..ee7feface27a 100644 --- a/arch/loongarch/include/asm/ftrace.h +++ b/arch/loongarch/include/asm/ftrace.h @@ -37,6 +37,23 @@ void prepare_ftrace_return(unsigned long self_addr, unsigned long *parent); #endif /* CONFIG_DYNAMIC_FTRACE */ +#ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS +struct ftrace_ops; + +struct ftrace_regs { + struct pt_regs regs; +}; + +static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) +{ + return &fregs->regs; +} + +#define ftrace_graph_func ftrace_graph_func +void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *op, struct ftrace_regs *fregs); +#endif + #endif /* __ASSEMBLY__ */ #endif /* CONFIG_FUNCTION_TRACER */ |