On Wed, Nov 01, 2017 at 06:56:42PM +0100, Borislav Petkov wrote: > On Fri, Oct 27, 2017 at 01:25:45PM -0700, Ricardo Neri wrote: > > insn_get_addr_ref() returns the effective address as defined by the > > section 3.7.5.1 Vol 1 of the Intel 64 and IA-32 Architectures Software > > Developer's Manual. In order to compute the linear address, we must add > > to the effective address the segment base address as set in the segment > > descriptor. The segment descriptor to use depends on the register used as > > operand and segment override prefixes, if any. > > > > In most cases, the segment base address will be 0 if the USER_DS/USER32_DS > > segment is used or if segmentation is not used. However, the base address > > is not necessarily zero if a user programs defines its own segments. This > > is possible by using a local descriptor table. > > > > Since the effective address is a signed quantity, the unsigned segment > > base address is saved in a separate variable and added to the final, > > unsigned, effective address. > > > > Cc: Dave Hansen <[email protected]> > > Cc: Adam Buchbinder <[email protected]> > > Cc: Colin Ian King <[email protected]> > > Cc: Lorenzo Stoakes <[email protected]> > > Cc: Qiaowei Ren <[email protected]> > > Cc: Arnaldo Carvalho de Melo <[email protected]> > > Cc: Masami Hiramatsu <[email protected]> > > Cc: Adrian Hunter <[email protected]> > > Cc: Kees Cook <[email protected]> > > Cc: Thomas Garnier <[email protected]> > > Cc: Peter Zijlstra <[email protected]> > > Cc: Borislav Petkov <[email protected]> > > Cc: Dmitry Vyukov <[email protected]> > > Cc: Ravi V. Shankar <[email protected]> > > Cc: [email protected] > > Signed-off-by: Ricardo Neri <[email protected]> > > --- > > arch/x86/lib/insn-eval.c | 55 > > +++++++++++++++++++++++++++++++++++++++++++++--- > > 1 file changed, 52 insertions(+), 3 deletions(-) > > Reviewed-by: Borislav Petkov <[email protected]>
Thank you Borislav! This should complete tne review of this series. As proposed earier [1], I guess that, if the tip maintainers are OK, this series can be merged in the tip tree? BR, Ricardo [1]. https://lkml.org/lkml/2017/10/20/851
