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From: Riku Voipio <riku.voipio@iki.fi>
To: MPRC <zhangheng@mprc.pku.edu.cn>
Cc: peter.maydell@linaro.org, Guan Xuetao <gxt@mprc.pku.edu.cn>,
	qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] proposal: drop linux-user unicore32 support from QEMU
Date: Fri, 23 Sep 2016 07:46:49 +0000	[thread overview]
Message-ID: <20160923074649.GA4827@kos.to> (raw)
In-Reply-To: <006C2BF7-5EF8-422A-A08C-4378D0E861F3@mprc.pku.edu.cn>

On Thu, Sep 22, 2016 at 11:09:55PM +0800, MPRC wrote:
> Hi, I'm fixing the syscall problem for linux-user/unicore32 in qemu.
> 
> I write a "hello world" program to test linux-user/unicore32 in qemu 2.7 with toolchain of uc4-1.0.5(you can download it through http://mprc.pku.edu.cn/~guanxuetao/linux/uc4-1.0.5-hard.tgz). And it's just OK.
> It goes well in the old version qemu that we using, also.
> 
> Can you discribe the bug more detailed? Or how do you find that the unicore32 don't use the real syscall numbers?
> How should test this? By Linux Test Project? It's not necessary to do all test in LTP.

The problem we see is that the system call numbers in qemus
unicore32/syscall_nr.h dont match what is linux mainline kernel. From the
toolchain linked, you seem to have kernel headers and syscall numbers 
based on a custom 2.6.32 fork. If one builds unicore32 binaries based on
Linux 4.4 kernel headers, they will not work qemu. OTOH the binary built
with the toolchain you linked, would not work with linux 4.4. This
disparity is what we'd like to get fixed.

Riku

  reply	other threads:[~2016-09-23  7:47 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-22 15:09 [Qemu-devel] proposal: drop linux-user unicore32 support from QEMU MPRC
2016-09-23  7:46 ` Riku Voipio [this message]
2016-09-26  5:45   ` Xuetao Guan
2016-09-28 16:18     ` Riku Voipio
2016-09-29  8:04       ` Xuetao Guan
  -- strict thread matches above, loose matches on Subject: below --
2016-05-12 14:34 Peter Maydell
2016-05-12 17:19 ` Richard Henderson
2016-05-20 12:48 ` Riku Voipio
2016-06-14 12:14   ` Peter Maydell
2016-06-14 13:43     ` Xuetao Guan
2016-09-11 15:08       ` Peter Maydell
2016-09-12  0:51         ` Xuetao Guan

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