diff options
Diffstat (limited to 'arch/arm64/include/asm/stacktrace.h')
| -rw-r--r-- | arch/arm64/include/asm/stacktrace.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/stacktrace.h b/arch/arm64/include/asm/stacktrace.h index 92ddb6d25cf3..6ad30776e984 100644 --- a/arch/arm64/include/asm/stacktrace.h +++ b/arch/arm64/include/asm/stacktrace.h @@ -57,6 +57,20 @@ static inline bool on_task_stack(struct task_struct *tsk, unsigned long sp) return (low <= sp && sp < high); } +#ifdef CONFIG_VMAP_STACK +DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack); + +static inline bool on_overflow_stack(unsigned long sp) +{ + unsigned long low = (unsigned long)raw_cpu_ptr(overflow_stack); + unsigned long high = low + OVERFLOW_STACK_SIZE; + + return (low <= sp && sp < high); +} +#else +static inline bool on_overflow_stack(unsigned long sp) { return false; } +#endif + /* * We can only safely access per-cpu stacks from current in a non-preemptible * context. @@ -69,6 +83,8 @@ static inline bool on_accessible_stack(struct task_struct *tsk, unsigned long sp return false; if (on_irq_stack(sp)) return true; + if (on_overflow_stack(sp)) + return true; return false; } |