Re: [PATCH V4 14/22] LoongArch: Add signal handling support
From: Al Viro
Date: Sat Oct 02 2021 - 22:37:01 EST
On Mon, Sep 27, 2021 at 02:42:51PM +0800, Huacai Chen wrote:
> This patch adds signal handling support for LoongArch.
No matter what you get in regs[4] after sys_rt_sigreturn(),
you should *NOT* treat it as restartable. IOW, you need to set
regs[0] to 0 in there (or in restore_sigcontext()). See e.g.
653d48b22166 for details of similar bug on arm.