| Date | Tue, 11 Apr 2017 23:56:01 +0200 | From | Borislav Petkov <> | Subject | Re: [v6 PATCH 01/21] x86/mpx: Use signed variables to compute effective addresses |
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On Tue, Mar 07, 2017 at 04:32:34PM -0800, Ricardo Neri wrote: > Even though memory addresses are unsigned. The operands used to compute the
... unsigned, the operands ...
> effective address do have a sign. This is true for the r/m part of the > ModRM byte, the base and index parts of the SiB byte as well as the > displacement. Thus, signed variables shall be used when computing the > effective address from these operands. Once the signed effective address > has been computed, it is casted to an unsigned long to determine the > linear address. > > Variables are renamed to better reflect the type of address being > computed.
-- Regards/Gruss, Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --
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