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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-04 11:00:08 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-05 17:36:20 +0200
commit9cc5c206d9b44b7763aab3082a5be72c78a3ef7a (patch)
treeafdc5bbb7921c5041678345ce7c62f40af608527 /arch/s390
parent338679f7ba4a81906b3fdfa6507824fdf704be80 (diff)
downloadop-kernel-dev-9cc5c206d9b44b7763aab3082a5be72c78a3ef7a.zip
op-kernel-dev-9cc5c206d9b44b7763aab3082a5be72c78a3ef7a.tar.gz
s390/dumpstack: fix address ranges for asynchronous and panic stack
git commit dc7ee00d4771b321 "s390: lowcore stack pointer offsets" introduced a regression in regard to show_stack(). The stack pointer for the asynchronous and the panic stack in the lowcore now have an additional offset applied to them. This offset needs to be taken into account in the calculation for the low and high address for the stacks. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/dumpstack.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c
index 2982974..87acc38 100644
--- a/arch/s390/kernel/dumpstack.c
+++ b/arch/s390/kernel/dumpstack.c
@@ -74,6 +74,8 @@ __show_trace(unsigned long sp, unsigned long low, unsigned long high)
static void show_trace(struct task_struct *task, unsigned long *stack)
{
+ const unsigned long frame_size =
+ STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
register unsigned long __r15 asm ("15");
unsigned long sp;
@@ -82,11 +84,13 @@ static void show_trace(struct task_struct *task, unsigned long *stack)
sp = task ? task->thread.ksp : __r15;
printk("Call Trace:\n");
#ifdef CONFIG_CHECK_STACK
- sp = __show_trace(sp, S390_lowcore.panic_stack - 4096,
- S390_lowcore.panic_stack);
+ sp = __show_trace(sp,
+ S390_lowcore.panic_stack + frame_size - 4096,
+ S390_lowcore.panic_stack + frame_size);
#endif
- sp = __show_trace(sp, S390_lowcore.async_stack - ASYNC_SIZE,
- S390_lowcore.async_stack);
+ sp = __show_trace(sp,
+ S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
+ S390_lowcore.async_stack + frame_size);
if (task)
__show_trace(sp, (unsigned long) task_stack_page(task),
(unsigned long) task_stack_page(task) + THREAD_SIZE);
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