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(parent: 0c25450) | patch
csky: Set regs->usp to kernel sp, when the exception is from kernel
authorGuo Ren <guoren@linux.alibaba.com>
Tue, 17 Dec 2019 03:12:55 +0000 (11:12 +0800)
committerGuo Ren <guoren@linux.alibaba.com>
Fri, 21 Feb 2020 07:43:24 +0000 (15:43 +0800)
commit643f06033a865ce15cd1d7d1ede696e5ea7c6da3
tree0de930c6cf557570a44beb5c167384ca0692d791tree | snapshot
parent0c254501bbe3ce541b5b510e39f1031c5f626056commit | 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>
arch/csky/abiv1/inc/abi/entry.h diff | blob | history
arch/csky/abiv2/inc/abi/entry.h diff | blob | history
arch/csky/kernel/atomic.S diff | blob | history
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