On Mon, 2009-06-22 at 23:32 +0200, Robert Millan wrote: > 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.
But if I omit ADDR32, I get: 0000016e <real_to_prot>: 16e: fa cli 16f: 2e 66 0f 01 16 68 01 lgdtl %cs:0x168 176: 0f 20 c0 mov %cr0,%eax The address is 16-bit. -- Regards, Pavel Roskin _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
