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Date: Mon, 14 May 2018 23:03:35 +0300
From: Alexey Dobriyan <adobriyan@gmail.com>
To: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
        open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] proc: test /proc/self/syscall
Message-ID: <20180514200335.GA2050@avx2>
References: <20180226212145.GB742@avx2>
 <CA+G9fYt0ymKKtk7mOgHyHiQHONMWK00Lo14FoRtd8tQM57ymsw@mail.gmail.com>
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On Tue, May 15, 2018 at 12:34:18AM +0530, Naresh Kamboju wrote:
> Hi Alexey,
> 
> On 27 February 2018 at 02:51, Alexey Dobriyan <adobriyan@gmail.com> wrote:
> > Read from /proc/self/syscall should yield read system call and correct
> > args in the output as current is reading /proc/self/syscall.
> 
> Is this test expected to work on arm32 bit architecture ?
> I have tested on arm32 devices and it returns 1 and reported as FAIL.
> 
> Strace output:
> <snip>
> munmap(0xb6f4a000, 13514)               = 0
> open("/proc/self/syscall", O_RDONLY)    = 3
> read(3, "3 0x3 0xbeacfbe0 0x40 0x3 0xbeac"..., 64) = 64

Yes! Obviously, it was tested on x86_64 only.

arch/arm/tools/syscall.tbl shows read is #3
and pointer looks 32-bit, so what's wrong?