From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Subject: Re: [v6 PATCH 11/21] insn/eval: Incorporate segment base in address
 computation
Date: Wed, 26 Apr 2017 18:31:17 -0700
Message-ID: <1493256677.36058.84.camel@ranerica-desktop>
References: <20170308003254.27833-1-ricardo.neri-calderon@linux.intel.com>
         <20170308003254.27833-12-ricardo.neri-calderon@linux.intel.com>
         <20170421145533.fg32dcf2af7mksxa@pd.tnic>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Return-path: <linux-msdos-owner@vger.kernel.org>
In-Reply-To: <20170421145533.fg32dcf2af7mksxa@pd.tnic>
Sender: linux-msdos-owner@vger.kernel.org
List-ID: <linux-msdos.vger.kernel.org>
Content-Type: text/plain; charset="us-ascii"
To: Borislav Petkov <bp@suse.de>
Cc: Ingo Molnar <mingo@redhat.com>, Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>, Andrew Morton <akpm@linux-foundation.org>, Brian Gerst <brgerst@gmail.com>, Chris Metcalf <cmetcalf@mellanox.com>, Dave Hansen <dave.hansen@linux.intel.com>, Paolo Bonzini <pbonzini@redhat.com>, Masami Hiramatsu <mhiramat@kernel.org>, Huang Rui <ray.huang@amd.com>, Jiri Slaby <jslaby@suse.cz>, Jonathan Corbet <corbet@lwn.net>, "Michael S. Tsirkin" <mst@redhat.com>, Paul Gortmaker <paul.gortmaker@windriver.com>, Vlastimil Babka <vbabka@suse.cz>, Chen Yucong <slaoub@gmail.com>, Alexandre Julliard <julliard@winehq.org>, Stas Sergeev <stsp@list.ru>, Fenghua Yu <fenghua.yu>

On Fri, 2017-04-21 at 16:55 +0200, Borislav Petkov wrote:
> On Tue, Mar 07, 2017 at 04:32:44PM -0800, Ricardo Neri wrote:
> > insn_get_addr_ref returns the effective address as defined by the
> 
> Please end function names with parentheses.

Will do.
> 
> > section 3.7.5.1 Vol 1 of the Intel 64 and IA-32 Architectures Software
> > Developer's Manual. In order to compute the linear address, we must add
> > to the effective address the segment base address as set in the segment
> > descriptor. Furthermore, the segment descriptor to use depends on the
> > register that is used as the base of the effective address. The effective
> > base address varies depending on whether the operand is a register or a
> > memory address and on whether a SiB byte is used.
> > 
> > In most cases, the segment base address will be 0 if the USER_DS/USER32_DS
> > segment is used or if segmentation is not used. However, the base address
> > is not necessarily zero if a user programs defines its own segments. This
> > is possible by using a local descriptor table.
> > 
> > Since the effective address is a signed quantity, the unsigned segment
> > base address saved in a separate variable and added to the final effective
> 
> ".. is saved..."

I will correct this.

Thanks and BR,
Ricardo