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s390/oprofile: fix address range for asynchronous stack

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git commit dc7ee00d47 ("s390: lowcore stack pointer offsets")
introduced a regression in regard to s390_backtrace(). The stack
pointer for the asynchronous stack in the lowcore now has an
additional offset applied. This offset needs to be taken into account
in the calculation for the low and high address for the stack.

This bug was already partially fixed with commit 9cc5c206d9
("s390/dumpstack: fix address ranges for asynchronous and panic
stack"). This patch fixes it also for the oprofile code.

Fixes: dc7ee00d47 ("s390: lowcore stack pointer offsets")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2016-02-09 12:03:31 +01:00 committed by Martin Schwidefsky
parent 1f8cbb9c83
commit 232f5dd785
1 changed files with 5 additions and 3 deletions
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8
arch/s390/oprofile/backtrace.c
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@ -54,12 +54,13 @@ __show_trace(unsigned int *depth, unsigned long sp,
void s390_backtrace(struct pt_regs * const regs, unsigned int depth)
{
unsigned long head;
unsigned long head, frame_size;
struct stack_frame* head_sf;
if (user_mode(regs))
return;
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
head = regs->gprs[15];
head_sf = (struct stack_frame*)head;
@ -68,8 +69,9 @@ void s390_backtrace(struct pt_regs * const regs, unsigned int depth)
head = head_sf->back_chain;
head = __show_trace(&depth, head, S390_lowcore.async_stack - ASYNC_SIZE,
S390_lowcore.async_stack);
head = __show_trace(&depth, head,
S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
S390_lowcore.async_stack + frame_size);
__show_trace(&depth, head, S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);