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| author |  Qing Zhang <zhangqing@loongson.cn>
| 2022-12-10 22:40:21 +0800 |
|---|---|---|
| committer |  Huacai Chen <chenhuacai@loongson.cn>
| 2022-12-14 08:41:54 +0800 |
| commit | a51ac5246d2505b58229242959d2bc73d113ca50 (patch) | |
| tree | a51e352384af8317ace4baf429c9457ad25d9435 /arch/loongarch/include | |
| parent | LoongArch/ftrace: Add HAVE_DYNAMIC_FTRACE_WITH_ARGS support (diff) | |
| download | linux-a51ac5246d2505b58229242959d2bc73d113ca50.tar.gz linux-a51ac5246d2505b58229242959d2bc73d113ca50.tar.bz2 linux-a51ac5246d2505b58229242959d2bc73d113ca50.zip | |
LoongArch/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support
ftrace_graph_ret_addr() can be called by stack unwinding code to convert
a found stack return address ('ret') to its original value, in case the
function graph tracer has modified it to be 'return_to_handler'. If the
hasn't been modified, the unchanged value of 'ret' is returned.
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 | 3 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/unwind.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/ftrace.h b/arch/loongarch/include/asm/ftrace.h index ee7feface27a..8c7d137e4871 100644 --- a/arch/loongarch/include/asm/ftrace.h +++ b/arch/loongarch/include/asm/ftrace.h @@ -6,6 +6,8 @@ #ifndef _ASM_LOONGARCH_FTRACE_H #define _ASM_LOONGARCH_FTRACE_H +#define GRAPH_FAKE_OFFSET (sizeof(struct pt_regs) - offsetof(struct pt_regs, regs[1])) + #ifdef CONFIG_FUNCTION_TRACER #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ @@ -24,6 +26,7 @@ struct dyn_ftrace; struct dyn_arch_ftrace { }; #define ARCH_SUPPORTS_FTRACE_OPS 1 +#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR #define ftrace_init_nop ftrace_init_nop int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); diff --git a/arch/loongarch/include/asm/unwind.h b/arch/loongarch/include/asm/unwind.h index a51eec00efb8..f2b52b9ea93d 100644 --- a/arch/loongarch/include/asm/unwind.h +++ b/arch/loongarch/include/asm/unwind.h @@ -21,6 +21,7 @@ struct unwind_state { struct stack_info stack_info; struct task_struct *task; bool first, error, is_ftrace; + int graph_idx; unsigned long sp, pc, ra; }; |