linux-kernel - Re: The 3G (or nG) Kernel Memory Space Offset

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Date:	Wed, 30 Aug 2006 08:11:18 +0200 (MEST)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
cc:	Peter Grandi <pg_lkm@....for.sabi.co.UK>,
	Linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: The 3G (or nG) Kernel Memory Space Offset

>
> The load address for ET_EXEC executables is defined as 0x08048000;
> you can use ET_DYN if you want to load them elsewhere.  Using lower
> addresses allows the use of instructions with smaller pointers and
> offsets (though this might be less important on x86).

Less on x86. HTE tells me there are only two ways (EB and E9):

      EB ??                 jmp OFFSET8     for 16/32/64
      E9 ?? ??              jmp OFFSET16    for 16-bit mode
      E9 ?? ?? ?? ??        jmp OFFSET32    for 32/64-bit mode



Jan Engelhardt
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