s390: add current_stack_pointer() helper function
Implement current_stack_pointer() helper function and use it everywhere, instead of having several different inline assembly variants. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Tested-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
parent
77ec8a5451
commit
76737ce17a
@ -203,6 +203,14 @@ unsigned long get_wchan(struct task_struct *p);
|
|||||||
/* Has task runtime instrumentation enabled ? */
|
/* Has task runtime instrumentation enabled ? */
|
||||||
#define is_ri_task(tsk) (!!(tsk)->thread.ri_cb)
|
#define is_ri_task(tsk) (!!(tsk)->thread.ri_cb)
|
||||||
|
|
||||||
|
static inline unsigned long current_stack_pointer(void)
|
||||||
|
{
|
||||||
|
unsigned long sp;
|
||||||
|
|
||||||
|
asm volatile("la %0,0(15)" : "=a" (sp));
|
||||||
|
return sp;
|
||||||
|
}
|
||||||
|
|
||||||
static inline unsigned short stap(void)
|
static inline unsigned short stap(void)
|
||||||
{
|
{
|
||||||
unsigned short cpu_address;
|
unsigned short cpu_address;
|
||||||
|
@ -67,12 +67,11 @@ static void show_trace(struct task_struct *task, unsigned long *stack)
|
|||||||
{
|
{
|
||||||
const unsigned long frame_size =
|
const unsigned long frame_size =
|
||||||
STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
|
STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
|
||||||
register unsigned long __r15 asm ("15");
|
|
||||||
unsigned long sp;
|
unsigned long sp;
|
||||||
|
|
||||||
sp = (unsigned long) stack;
|
sp = (unsigned long) stack;
|
||||||
if (!sp)
|
if (!sp)
|
||||||
sp = task ? task->thread.ksp : __r15;
|
sp = task ? task->thread.ksp : current_stack_pointer();
|
||||||
printk("Call Trace:\n");
|
printk("Call Trace:\n");
|
||||||
#ifdef CONFIG_CHECK_STACK
|
#ifdef CONFIG_CHECK_STACK
|
||||||
sp = __show_trace(sp,
|
sp = __show_trace(sp,
|
||||||
@ -95,15 +94,16 @@ static void show_trace(struct task_struct *task, unsigned long *stack)
|
|||||||
|
|
||||||
void show_stack(struct task_struct *task, unsigned long *sp)
|
void show_stack(struct task_struct *task, unsigned long *sp)
|
||||||
{
|
{
|
||||||
register unsigned long *__r15 asm ("15");
|
|
||||||
unsigned long *stack;
|
unsigned long *stack;
|
||||||
int i;
|
int i;
|
||||||
|
|
||||||
if (!sp)
|
stack = sp;
|
||||||
stack = task ? (unsigned long *) task->thread.ksp : __r15;
|
if (!stack) {
|
||||||
else
|
if (!task)
|
||||||
stack = sp;
|
stack = (unsigned long *)current_stack_pointer();
|
||||||
|
else
|
||||||
|
stack = (unsigned long *)task->thread.ksp;
|
||||||
|
}
|
||||||
for (i = 0; i < 20; i++) {
|
for (i = 0; i < 20; i++) {
|
||||||
if (((addr_t) stack & (THREAD_SIZE-1)) == 0)
|
if (((addr_t) stack & (THREAD_SIZE-1)) == 0)
|
||||||
break;
|
break;
|
||||||
|
@ -164,8 +164,7 @@ void do_softirq_own_stack(void)
|
|||||||
{
|
{
|
||||||
unsigned long old, new;
|
unsigned long old, new;
|
||||||
|
|
||||||
/* Get current stack pointer. */
|
old = current_stack_pointer();
|
||||||
asm volatile("la %0,0(15)" : "=a" (old));
|
|
||||||
/* Check against async. stack address range. */
|
/* Check against async. stack address range. */
|
||||||
new = S390_lowcore.async_stack;
|
new = S390_lowcore.async_stack;
|
||||||
if (((new - old) >> (PAGE_SHIFT + THREAD_ORDER)) != 0) {
|
if (((new - old) >> (PAGE_SHIFT + THREAD_ORDER)) != 0) {
|
||||||
|
@ -77,10 +77,9 @@ static void __save_stack_trace(struct stack_trace *trace, unsigned long sp)
|
|||||||
|
|
||||||
void save_stack_trace(struct stack_trace *trace)
|
void save_stack_trace(struct stack_trace *trace)
|
||||||
{
|
{
|
||||||
register unsigned long r15 asm ("15");
|
|
||||||
unsigned long sp;
|
unsigned long sp;
|
||||||
|
|
||||||
sp = r15;
|
sp = current_stack_pointer();
|
||||||
__save_stack_trace(trace, sp);
|
__save_stack_trace(trace, sp);
|
||||||
if (trace->nr_entries < trace->max_entries)
|
if (trace->nr_entries < trace->max_entries)
|
||||||
trace->entries[trace->nr_entries++] = ULONG_MAX;
|
trace->entries[trace->nr_entries++] = ULONG_MAX;
|
||||||
@ -92,10 +91,8 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
|
|||||||
unsigned long sp, low, high;
|
unsigned long sp, low, high;
|
||||||
|
|
||||||
sp = tsk->thread.ksp;
|
sp = tsk->thread.ksp;
|
||||||
if (tsk == current) {
|
if (tsk == current)
|
||||||
/* Get current stack pointer. */
|
sp = current_stack_pointer();
|
||||||
asm volatile("la %0,0(15)" : "=a" (sp));
|
|
||||||
}
|
|
||||||
low = (unsigned long) task_stack_page(tsk);
|
low = (unsigned long) task_stack_page(tsk);
|
||||||
high = (unsigned long) task_pt_regs(tsk);
|
high = (unsigned long) task_pt_regs(tsk);
|
||||||
save_context_stack(trace, sp, low, high, 1);
|
save_context_stack(trace, sp, low, high, 1);
|
||||||
|
Loading…
Reference in New Issue
Block a user