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From: Richard Henderson <rth@twiddle.net>
To: Stefano Bonifazi <stefboombastic@gmail.com>
Cc: QEMU Developers <qemu-devel@nongnu.org>,
	Mike Frysinger <vapier.adi@gmail.com>
Subject: Re: [Qemu-devel] qemu-user: relocating target code weakness
Date: Tue, 25 Jan 2011 08:22:25 -0800	[thread overview]
Message-ID: <4D3EF8C1.8010507@twiddle.net> (raw)
In-Reply-To: <4D3EAA40.30300@gmail.com>

On 01/25/2011 02:47 AM, Stefano Bonifazi wrote:
> You keep getting the name of the dynamic linker from the PT_INTERP program segment, but that gives you the absolute position of the dynamic linker inside the machine the target binary was created in.
> Here qemu-user is an emultaor used for running that binary into another machine..
> Qemu default to usr/gnemul/ the path where the libs for the target machines are stored...
> So we need to patch the absolute dynamic linker name with the proper path..

In load_elf_interp,

    fd = open(path(filename), O_RDONLY);

Notice the path function call.  That does the translation into gnemul, given
the proper configure option, or -L command-line option.


r~

  reply	other threads:[~2011-01-25 16:22 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-24 11:34 [Qemu-devel] qemu-user: relocating target code weakness Stefano Bonifazi
2011-01-24 16:29 ` Mulyadi Santosa
2011-01-24 18:16   ` Stefano Bonifazi
2011-01-24 20:00     ` Mike Frysinger
2011-01-24 20:58       ` Stefano Bonifazi
2011-01-24 21:21         ` Mike Frysinger
2011-01-24 21:52           ` Stefano Bonifazi
2011-01-24 22:11             ` Mike Frysinger
2011-01-24 22:24               ` Stefano Bonifazi
2011-01-24 22:34                 ` Mike Frysinger
2011-01-25  0:06   ` Mike Frysinger
2011-01-25  0:18     ` Mike Frysinger
2011-01-25  8:49       ` Stefano Bonifazi
2011-01-25  8:26     ` Stefano Bonifazi
2011-01-24 19:46 ` Richard Henderson
2011-01-24 21:44   ` Stefano Bonifazi
2011-01-24 23:32     ` Mike Frysinger
2011-01-25  8:25       ` Stefano Bonifazi
2011-01-25  1:36     ` Richard Henderson
2011-01-25  8:47       ` Stefano Bonifazi
2011-01-25  8:53         ` Mike Frysinger
2011-01-25  9:58           ` Stefano Bonifazi
2011-01-25 10:47           ` Stefano Bonifazi
2011-01-25 16:22             ` Richard Henderson [this message]
2011-01-25 19:03               ` Stefano Bonifazi
2011-01-25 11:06           ` Stefano Bonifazi
2011-01-25 16:26             ` Richard Henderson
2011-01-25 19:49               ` Stefano Bonifazi
2011-01-25 20:53                 ` Lluís
2011-01-26 11:07       ` Stefano Bonifazi
2011-01-26 15:38         ` Richard Henderson
2011-01-26 17:44           ` Stefano Bonifazi
2011-01-26 20:17           ` Lluís
2011-01-26 20:19             ` Richard Henderson
2011-01-26 20:33               ` Stefano Bonifazi
2011-01-26 20:36               ` Lluís

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