| commit | af89ebaa64de726ca0a39bbb0bf0c81a1f43ad50 | [log] [tgz] |
|---|---|---|
| author | Guo Ren <guoren@linux.alibaba.com> | Fri Sep 24 15:33:38 2021 +0800 |
| committer | Guo Ren <guoren@linux.alibaba.com> | Sat Oct 16 07:20:12 2021 +0800 |
| tree | 42259e29611ea2266daeedb158aae45af783ba85 | |
| parent | fbd63c08cdcca5fb1315aca3172b3c9c272cfb4f [diff] |
csky: Fixup regs.sr broken in ptrace gpr_get() return the entire pt_regs (include sr) to userspace, if we don't restore the C bit in gpr_set, it may break the ALU result in that context. So the C flag bit is part of gpr context, that's why riscv totally remove the C bit in the ISA. That makes sr reg clear from userspace to supervisor privilege. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@vger.kernel.org