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

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Date:   Mon, 25 Mar 2019 18:27:23 +0300
From:   "Dmitry V. Levin" <ldv@...linux.org>
To:     Guo Ren <guoren@...nel.org>
Cc:     linux-arch@...r.kernel.org, ren_guo@...ky.com,
        strace-devel@...ts.strace.io, arnd@...db.de,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] csky: Update syscall_trace_enter/exit implementation

On Mon, Mar 25, 2019 at 08:41:54PM +0800, Guo Ren wrote:
> 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?

From UAPI perspective?  No, I don't see any more UAPI issues with the patch.


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