Re: [PATCH v2] Fix linux personality syscall wrapper

["Dmitry V. Levin" <ldv at altlinux dot org>]

On Thu, Dec 31, 2015 at 07:06:57PM +0000, Joseph Myers wrote:
> On Wed, 30 Dec 2015, Dmitry V. Levin wrote:
> 
> > - for each 32-bit architecture that use negated errno semantics,
> > add a NOERRNO personality entry to their syscalls.list file;
> 
> What is your basis for counting MIPS n32 as such an architecture,

I suppose mips/mips64/n32/syscalls.list is for 64-bit MIPS kernel that
shouldn't have this issue because the value returned by sys_personality
is not negative in 64-bit kernels.

> but not  counting 32-bit SPARC as one?  As far as I can see. MIPS uses separate 
> errno return for all ABIs, while SPARC uses negated errno.

MIPS and SPARC both use a dedicated register to signal an error condition
on return from syscall.


-- 
ldv

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