From: Christoph Hellwig <hch@sgi.com>
To: Andrew Clausen <clausen@melbourne.sgi.com>
Cc: linux-mips@linux-mips.org, gnb@melbourne.sgi.com
Subject: Re: debian's mips userland on mips64
Date: Wed, 22 Jan 2003 12:45:40 -0500 [thread overview]
Message-ID: <20030122124540.A31505@sgi.com> (raw)
In-Reply-To: <20030122073006.GF6262@pureza.melbourne.sgi.com>; from clausen@melbourne.sgi.com on Wed, Jan 22, 2003 at 06:30:06PM +1100
On Wed, Jan 22, 2003 at 06:30:06PM +1100, Andrew Clausen wrote:
> Hi all,
>
> I'm playing with Debian on an Origin 200 (aka ip27 - 64-bit mips).
> The current setup in the mips64-linux world is 64bit kernel +
> 32bit userland. So, a mips64-linux kernel can be mostly run a
> mips32-linux userland out of the box.
>
> Unfortunately, this doesn't apply to strace, as this play with
> the 64bit kernel's stack (eg: struct pt_regs), which is different in
> mips32 and mips64.
>
> So, I guess the solution is to hack (it's ugly as hell already...)
> strace to detect and understand the 64 bit stack from a 32 bit
> userland?
I don't think so. You should rather implement a sys32_ptrace and
reference it in the 32bit syscall vector. Look at the version in
arch/ia64/ia32/sys_ia32.c for an example.
next prev parent reply other threads:[~2003-01-22 10:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-22 7:30 debian's mips userland on mips64 Andrew Clausen
2003-01-22 17:45 ` Christoph Hellwig [this message]
2003-01-22 12:45 ` Ralf Baechle
2003-01-22 20:09 ` Christoph Hellwig
2003-01-23 3:05 ` Greg Banks
2003-01-23 5:04 ` Ralf Baechle
2003-01-22 21:47 ` Greg Lindahl
2003-01-28 7:00 ` Ralf Baechle
[not found] ` <002001c2cba5$ab641320$4437e183@fermi.win.fnal.gov>
2003-02-03 22:56 ` Andrew Clausen
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