KVM: x86 emulator: don't depend on cr2 for mov abs emulation

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The 'mov abs' instruction family (opcodes 0xa0 - 0xa3) still depends on cr2
provided by the page fault handler.  This is wrong for several reasons:

- if an instruction accessed misaligned data that crosses a page boundary,
  and if the fault happened on the second page, cr2 will point at the
  second page, not the data itself.

- if we're emulating in real mode, or due to a FlexPriority exit, there
  is no cr2 generated.

So, this change adds decoding for this instruction form and drops reliance
on cr2.

Signed-off-by: Avi Kivity <avi@qumranet.com>

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This commit is contained in:

Avi Kivity 2007-10-28 16:34:25 +02:00

parent fe7935d49f

commit c7e75a3db4

1 changed files with 30 additions and 20 deletions

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drivers/kvm/x86_emulate.c

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