On Mon, Jun 22, 2009 at 10:52:13PM +0200, Robert Millan wrote:
> I don't think it's possible to use relative addresses
> with this particular instruction.
Uhm sorry, this was silly. Of course you can use addresses relative to a
segment in lgdt, but this doesn't change the fact that GAS always gives
you absolute ones.
Also, I'm not sure if it's possible to use a 16-bit field in this instruction,
it could be that the field is always 32-bit, even if it's relative to a
segment. This dump is from the i386-pc kernel.img:
836f: 2e 67 66 0f 01 15 68 addr32 lgdtl %cs:0x8368
8376: 83 00 00
a little-endian 0x00008368 is seen here, indicating the field is 32-bit.
--
Robert Millan
The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
how) you may access your data; but nobody's threatening your freedom: we
still allow you to remove your data and not access it at all."
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