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Re: [Qemu-devel] RFC: fix run of 32 bits Linux executables on 64 bits ta


From: Fabrice Bellard
Subject: Re: [Qemu-devel] RFC: fix run of 32 bits Linux executables on 64 bits targets
Date: Wed, 10 Oct 2007 10:18:33 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20050922 Fedora/1.7.12-1.3.1

J. Mayer wrote:
Following the patches done for elfload32, it appeared to me that there
were still problems that would prevent 32 bits executables to run on 64
bits target in linux user mode emulation.
> [...]

Are you sure it is a good idea to try to add 32 bit executable support to a 64 bit target ? In the end you will need to write a 64 bit to 32 bit linux syscall converter which would mean duplicating all the linux-user code of the corresponding 32 bit target (think of ioctls with strutures, signals frames, etc...).

Fabrice.




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