[PATCH v6 06/17] arm64: stacktrace: Add description of stacktrace/common.h
From: Kalesh Singh <hidden>
Date: 2022-07-26 07:39:58
Also in:
kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Add brief description on how to use stacktrace/common.h to implement a stack unwinder. Signed-off-by: Kalesh Singh <redacted> Reviewed-by: Fuad Tabba <redacted> --- Changes in v6: - Add Fuad’s Reviewed-by tag Changes in v5: - Add short description of each required function, per Fuad and Marc arch/arm64/include/asm/stacktrace/common.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/arch/arm64/include/asm/stacktrace/common.h b/arch/arm64/include/asm/stacktrace/common.h
index 4b632141d91c..45474b383630 100644
--- a/arch/arm64/include/asm/stacktrace/common.h
+++ b/arch/arm64/include/asm/stacktrace/common.h@@ -2,6 +2,21 @@ /* * Common arm64 stack unwinder code. * + * To implement a new arm64 stack unwinder: + * 1) Include this header + * + * 2) Provide implementations for the following functions: + * on_overflow_stack(): Returns true if SP is on the overflow + * stack. + * on_accessible_stack(): Returns true is SP is on any accessible + * stack. + * unwind_next(): Performs validation checks on the frame + * pointer, and transitions unwind_state + * to the next frame. + * + * See: arch/arm64/include/asm/stacktrace.h for reference + * implementations. + * * Copyright (C) 2012 ARM Ltd. */ #ifndef __ASM_STACKTRACE_COMMON_H
--
2.37.1.359.gd136c6c3e2-goog
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