From mboxrd@z Thu Jan  1 00:00:00 1970
From: arnd@arndb.de (Arnd Bergmann)
Date: Fri, 29 Apr 2016 19:30:19 +0200
Subject: [PATCH 24/25] arm64:ilp32: add vdso-ilp32 and use for signal
 return
In-Reply-To: <20160429160154.GC30316@e104818-lin.cambridge.arm.com>
References: <1459894127-17698-1-git-send-email-ynorov@caviumnetworks.com>
 <1459894127-17698-25-git-send-email-ynorov@caviumnetworks.com>
 <20160429160154.GC30316@e104818-lin.cambridge.arm.com>
Message-ID: <1554541.oDP7Ro5zB2@wuerfel>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Friday 29 April 2016 17:01:55 Catalin Marinas wrote:
> On Wed, Apr 06, 2016 at 01:08:46AM +0300, Yury Norov wrote:
> > ILP32 VDSO exports next symbols:
> >  __kernel_rt_sigreturn;
> >  __kernel_gettimeofday;
> >  __kernel_clock_gettime;
> >  __kernel_clock_getres;
> 
> [...]
> 
> > +$(obj)/gettimeofday-ilp32.o: $(src)/../vdso/gettimeofday.S
> > +	$(call if_changed_dep,vdso-ilp32as)
> 
> Are struct timeval and timespec the same between ILP32 and LP64? For
> example, __kernel_gettimeofday() assumes TVAL_TV_SEC offset defined in
> asm-offsets.c based on the LP64 timeval.

No, ilp32 uses the generic 32-bit data structures, which have a 32-bit
time_t. I guess that means it can work for little-endian but not
big-endian, right?

	Arnd