| commit | f8e17c17b81070f38062dce79ca7f4541851dadd | [log] [tgz] |
|---|---|---|
| author | Guo Ren <guoren@linux.alibaba.com> | Tue Dec 17 11:12:55 2019 +0800 |
| committer | Guo Ren <guoren@linux.alibaba.com> | Fri Feb 21 15:43:24 2020 +0800 |
| tree | 0de930c6cf557570a44beb5c167384ca0692d791 | |
| parent | 7f4a567332f035ab16b29010fbd04a0f10183c77 [diff] |
csky: Set regs->usp to kernel sp, when the exception is from kernel In the past, we didn't care about kernel sp when saving pt_reg. But in some cases, we still need pt_reg->usp to represent the kernel stack before enter exception. For cmpxhg in atomic.S, we need save and restore usp for above. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>