From mboxrd@z Thu Jan  1 00:00:00 1970
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
Date: Sat, 17 Aug 2013 14:57:51 +0100
Subject: Start symbol for an compressed kernel
In-Reply-To: <CANEcUBX8TNvTTbTP9+uLEeHNez_ofCfkFrduRA=WVaWxA6njBQ@mail.gmail.com>
References: <CANEcUBUg++5UcKPKy+uUfJkfZRqt3C-52gCTV0ov76=GSH2fYg@mail.gmail.com>
 <20130817134832.GJ23006@n2100.arm.linux.org.uk>
 <CANEcUBX8TNvTTbTP9+uLEeHNez_ofCfkFrduRA=WVaWxA6njBQ@mail.gmail.com>
Message-ID: <20130817135751.GL23006@n2100.arm.linux.org.uk>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Sat, Aug 17, 2013 at 09:56:14PM +0800, zhaobin xv wrote:
> 2013/8/17 Russell King - ARM Linux <linux@arm.linux.org.uk>:
> > On Sat, Aug 17, 2013 at 07:39:46PM +0800, zhaobin xv wrote:
> >> how to find Start symbol for an compressed kernel for arm
> >
> > The start address of a compressed kernel is the first byte of the image.
> >
> > Symbolically, that is 'start', which is a non-global symbol.  However,
> > this symbol is useless since it normally is zero, because the entire
> > image is relocatable and therefore built for address zero.
> >
> > However, it is normal to load the image not at address zero.
> 
> why do U define ENTRY(_start)?
> Is _start the Start symbol?
> how to explain _start

There is no _start symbol in the compressed kernel.