From 15a59f19a015185bff90a68f601caec151dea4b4 Mon Sep 17 00:00:00 2001 From: Kalesh Singh Date: Tue, 26 Jul 2022 00:37:35 -0700 Subject: [PATCH] arm64: stacktrace: Factor out on_accessible_stack_common() Move common on_accessible_stack checks to stacktrace/common.h. This is used in the implementation of the nVHE hypervisor unwinder later in this series. Signed-off-by: Kalesh Singh Reviewed-by: Fuad Tabba Reviewed-by: Mark Brown Tested-by: Fuad Tabba Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220726073750.3219117-3-kaleshsingh@google.com --- arch/arm64/include/asm/stacktrace.h | 6 ++---- arch/arm64/include/asm/stacktrace/common.h | 18 ++++++++++++++++++ 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/stacktrace.h b/arch/arm64/include/asm/stacktrace.h index 79f455b37c84..43f4b4a6d383 100644 --- a/arch/arm64/include/asm/stacktrace.h +++ b/arch/arm64/include/asm/stacktrace.h @@ -65,8 +65,8 @@ static inline bool on_accessible_stack(const struct task_struct *tsk, unsigned long sp, unsigned long size, struct stack_info *info) { - if (info) - info->type = STACK_TYPE_UNKNOWN; + if (on_accessible_stack_common(tsk, sp, size, info)) + return true; if (on_task_stack(tsk, sp, size, info)) return true; @@ -74,8 +74,6 @@ static inline bool on_accessible_stack(const struct task_struct *tsk, return false; if (on_irq_stack(sp, size, info)) return true; - if (on_overflow_stack(sp, size, info)) - return true; if (on_sdei_stack(sp, size, info)) return true; diff --git a/arch/arm64/include/asm/stacktrace/common.h b/arch/arm64/include/asm/stacktrace/common.h index 64ae4f6b06fe..f58b786460d3 100644 --- a/arch/arm64/include/asm/stacktrace/common.h +++ b/arch/arm64/include/asm/stacktrace/common.h @@ -62,6 +62,9 @@ struct unwind_state { struct task_struct *task; }; +static inline bool on_overflow_stack(unsigned long sp, unsigned long size, + struct stack_info *info); + static inline bool on_stack(unsigned long sp, unsigned long size, unsigned long low, unsigned long high, enum stack_type type, struct stack_info *info) @@ -80,6 +83,21 @@ static inline bool on_stack(unsigned long sp, unsigned long size, return true; } +static inline bool on_accessible_stack_common(const struct task_struct *tsk, + unsigned long sp, + unsigned long size, + struct stack_info *info) +{ + if (info) + info->type = STACK_TYPE_UNKNOWN; + + /* + * Both the kernel and nvhe hypervisor make use of + * an overflow_stack + */ + return on_overflow_stack(sp, size, info); +} + static inline void unwind_init_common(struct unwind_state *state, struct task_struct *task) {