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Date: Wed, 17 Sep 2008 08:35:57 -0700
From: Julian Elischer <julian@elischer.org>
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To: "Andrew N. Below" <defan@zenon.net>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: amd64, COMPAT_IA32 & syscall diverts
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Andrew N. Below wrote:
> Hi all.
> 
> We have loadable kernel module with
> several syscall intercepting functions
> (e.g., sysent[SYS___sysctl].sy_call).
> Earlier, this module was built and used
> on i386 platform, now we have to run it
> on amd64. For some reasons we have to
> enable COMPAT_IA32 option in kernel.
> 
> Our syscall wrapper sucessfully receiving
> syscalls from amd64 binaries, but we have
> nothing from old i386 binaries.
> 
> Seems like these calls are made bypassing
> our kernel module.

x86 binaries use a separate syscall table, so you need to patch
both tables.

> 
> Is there any way to handle them?
> 
> OS is freebsd 6.3-stable.
> 
> Thanks, 
> --
> Andrew
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