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arm64: stacktrace: Factor out some common code into on_stack() 

There are some common codes for stack checking, so factors it out into
the function on_stack().

No functional change.

Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
Link: https://lore.kernel.org/r/07b3b0e6-3f58-4fed-07ea-7d17b7508948@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Yunfeng Ye 2020-05-08 11:15:45 +08:00 committed by Will Deacon
parent b322c65f8c
commit bd4298c72b
2 changed files with 16 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
arch/arm64/include/asm/stacktrace.h
View File

@ -68,12 +68,10 @@ extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk);
DECLARE_PER_CPU(unsigned long *, irq_stack_ptr);
static inline bool on_irq_stack(unsigned long sp,
static inline bool on_stack(unsigned long sp, unsigned long low,
unsigned long high, enum stack_type type,
struct stack_info *info)
{
unsigned long low = (unsigned long)raw_cpu_read(irq_stack_ptr);
unsigned long high = low + IRQ_STACK_SIZE;
if (!low)
return false;
@ -83,12 +81,20 @@ static inline bool on_irq_stack(unsigned long sp,
if (info) {
info->low = low;
info->high = high;
info->type = STACK_TYPE_IRQ;
info->type = type;
}
return true;
}
static inline bool on_irq_stack(unsigned long sp,
struct stack_info *info)
{
unsigned long low = (unsigned long)raw_cpu_read(irq_stack_ptr);
unsigned long high = low + IRQ_STACK_SIZE;
return on_stack(sp, low, high, STACK_TYPE_IRQ, info);
}
static inline bool on_task_stack(const struct task_struct *tsk,
unsigned long sp,
struct stack_info *info)
@ -96,16 +102,7 @@ static inline bool on_task_stack(const struct task_struct *tsk,
unsigned long low = (unsigned long)task_stack_page(tsk);
unsigned long high = low + THREAD_SIZE;
if (sp < low || sp >= high)
return false;
if (info) {
info->low = low;
info->high = high;
info->type = STACK_TYPE_TASK;
}
return true;
return on_stack(sp, low, high, STACK_TYPE_TASK, info);
}
#ifdef CONFIG_VMAP_STACK
@ -117,16 +114,7 @@ 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;
if (sp < low || sp >= high)
return false;
if (info) {
info->low = low;
info->high = high;
info->type = STACK_TYPE_OVERFLOW;
}
return true;
return on_stack(sp, low, high, STACK_TYPE_OVERFLOW, info);
}
#else
static inline bool on_overflow_stack(unsigned long sp,

28
arch/arm64/kernel/sdei.c
View File

@ -95,19 +95,7 @@ static bool on_sdei_normal_stack(unsigned long sp, struct stack_info *info)
unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_normal_ptr);
unsigned long high = low + SDEI_STACK_SIZE;
if (!low)
return false;
if (sp < low || sp >= high)
return false;
if (info) {
info->low = low;
info->high = high;
info->type = STACK_TYPE_SDEI_NORMAL;
}
return true;
return on_stack(sp, low, high, STACK_TYPE_SDEI_NORMAL, info);
}
static bool on_sdei_critical_stack(unsigned long sp, struct stack_info *info)
@ -115,19 +103,7 @@ static bool on_sdei_critical_stack(unsigned long sp, struct stack_info *info)
unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_critical_ptr);
unsigned long high = low + SDEI_STACK_SIZE;
if (!low)
return false;
if (sp < low || sp >= high)
return false;
if (info) {
info->low = low;
info->high = high;
info->type = STACK_TYPE_SDEI_CRITICAL;
}
return true;
return on_stack(sp, low, high, STACK_TYPE_SDEI_CRITICAL, info);
}
bool _on_sdei_stack(unsigned long sp, struct stack_info *info)