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hypervisor: x86: emulator: set IP properly for newly fetched stream

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The default value of IP is zero. If the decoder's state not set
properly, then the guest state is going to be wrong.

Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu 2024-07-03 18:46:35 +00:00 committed by Liu Wei
parent 9f3bea3e3f
commit 1eb4133034
1 changed files with 1 additions and 0 deletions
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hypervisor/src/arch/x86/emulator/mod.rs
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@ -588,6 +588,7 @@ impl<'a, T: CpuStateManager> Emulator<'a, T> {
// Once we have the new stream, we must create a new decoder // Once we have the new stream, we must create a new decoder
// and emulate one last instruction from the last decoded IP. // and emulate one last instruction from the last decoded IP.
decoder = Decoder::new(64, &fetched_insn_stream, DecoderOptions::NONE); decoder = Decoder::new(64, &fetched_insn_stream, DecoderOptions::NONE);
decoder.set_ip(last_decoded_ip);
decoder.decode_out(&mut insn); decoder.decode_out(&mut insn);
if decoder.last_error() != DecoderError::None { if decoder.last_error() != DecoderError::None {
return Err(EmulationError::InstructionFetchingError(anyhow!( return Err(EmulationError::InstructionFetchingError(anyhow!(