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| author | Guo Ren <ren_guo@c-sky.com> | 2019-01-31 14:34:37 +0800 |
|---|---|---|
| committer | Guo Ren <ren_guo@c-sky.com> | 2019-02-13 09:48:14 +0800 |
| commit | 131aee8b9807bc98379fa5a0270389dbc7dcec90 (patch) | |
| tree | 7a627f509aec9f17e36bd540b44fd167ef0e0482 /arch/csky | |
| parent | 76d21d186a65523b08ea5f70302e2c29ee8f6a8d (diff) | |
| download | linux-131aee8b9807bc98379fa5a0270389dbc7dcec90.tar.bz2 | |
csky: Fixup dead loop in show_stack
When STACKTRACE is enabled, we must pass fp as stack for unwind,
otherwise random value in stack will casue a dead loop.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reported-by: Lu Baoquan <lu.baoquan@intellif.com>
Diffstat (limited to 'arch/csky')
| -rw-r--r-- | arch/csky/kernel/dumpstack.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/csky/kernel/dumpstack.c b/arch/csky/kernel/dumpstack.c index 659253e9989c..d67f9777cfd9 100644 --- a/arch/csky/kernel/dumpstack.c +++ b/arch/csky/kernel/dumpstack.c @@ -38,7 +38,11 @@ void show_stack(struct task_struct *task, unsigned long *stack) if (task) stack = (unsigned long *)thread_saved_fp(task); else +#ifdef CONFIG_STACKTRACE + asm volatile("mov %0, r8\n":"=r"(stack)::"memory"); +#else stack = (unsigned long *)&stack; +#endif } show_trace(stack); |