linux-kernel - Re: [PATCH] x86: pass in pt_regs pointer for syscalls that need it (take 2)

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Message-ID: <49934C01.8000309@zytor.com>
Date:	Wed, 11 Feb 2009 14:06:57 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Brian Gerst <brgerst@...il.com>
CC:	Tejun Heo <tj@...nel.org>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: pass in pt_regs pointer for syscalls that need it
 (take 2)

Brian Gerst wrote:
> Some syscalls need to access the pt_regs structure, either to copy
> user register state or to modifiy it.  This patch adds stubs to load
> the address of the pt_regs struct into the %eax register, and changes
> the syscalls to take the pointer as an argument instead of relying on
> the assumption that the pt_regs structure overlaps the function
> arguments.
> 
> Signed-off-by: Brian Gerst <brgerst@...il.com>

Testing this now, together with the do_rt_sigreturn -> sys_rt_sigreturn 
change.  If it works okay I'll commit it as an incremental diff to 
tip:core/percpu.

	-hpa
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