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

From: "H. Peter Anvin" <hpa@zytor.com>
To: Brian Gerst <brgerst@gmail.com>
Cc: Tejun Heo <tj@kernel.org>, Ingo Molnar <mingo@elte.hu>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: pass in pt_regs pointer for syscalls that need it (take 2)
Date: Wed, 11 Feb 2009 14:06:57 -0800	[thread overview]
Message-ID: <49934C01.8000309@zytor.com> (raw)
In-Reply-To: <1234388638-13663-1-git-send-email-brgerst@gmail.com>

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@gmail.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