linux-kernel - Re: [PATCH] csky: Update syscall_trace

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Message-ID: <20190325124154.GA2653@guoren-Inspiron-7460>
Date:   Mon, 25 Mar 2019 20:41:54 +0800
From:   Guo Ren <guoren@...nel.org>
To:     "Dmitry V. Levin" <ldv@...linux.org>
Cc:     arnd@...db.de, linux-arch@...r.kernel.org,
        strace-devel@...ts.strace.io, linux-kernel@...r.kernel.org,
        ren_guo@...ky.com
Subject: Re: [PATCH] csky: Update syscall_trace_enter/exit implementation

Thx Dmitry,

On Mon, Mar 25, 2019 at 03:17:54PM +0300, Dmitry V. Levin wrote:
> On Mon, Mar 25, 2019 at 08:03:39PM +0800, guoren@...nel.org wrote:
> [...]
> > diff --git a/arch/csky/include/uapi/asm/ptrace.h b/arch/csky/include/uapi/asm/ptrace.h
> > index a4eaa8d..9bf5b1a 100644
> > --- a/arch/csky/include/uapi/asm/ptrace.h
> > +++ b/arch/csky/include/uapi/asm/ptrace.h
> > @@ -62,6 +62,11 @@ struct user_fp {
> >  #define instruction_pointer(regs) ((regs)->pc)
> >  #define profile_pc(regs) instruction_pointer(regs)
> >  
> > +static inline unsigned long regs_return_value(struct pt_regs *regs)
> > +{
> > +	return regs->a0;
> > +}
> > +
> >  #endif /* __KERNEL__ */
> >  #endif /* __ASSEMBLY__ */
> >  #endif /* _CSKY_PTRACE_H */
> 
> I wonder why we have this #ifdef __KERNEL__ code in the uapi namespace,
> it defeats the idea of uapi.  Doesn't it belong to non-uapi
> include/asm/ptrace.h namespace?

Yes, I should move __KERNEL__ codes into arch/csky/include/asm/ptrace.h.
But it'll be another patch for the modification. Any other problems?

Best Regards
 Guo Ren