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[Bug 1759333] Re: Illegal Instruction with HVF when encountering SSE ins
From: |
Thomas Huth |
Subject: |
[Bug 1759333] Re: Illegal Instruction with HVF when encountering SSE instructions in the emulator |
Date: |
Wed, 05 May 2021 08:19:25 -0000 |
This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:
https://gitlab.com/qemu-project/qemu/-/issues/150
** Changed in: qemu
Status: Triaged => Expired
** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #150
https://gitlab.com/qemu-project/qemu/-/issues/150
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https://bugs.launchpad.net/bugs/1759333
Title:
Illegal Instruction with HVF when encountering SSE instructions in the
emulator
Status in QEMU:
Expired
Bug description:
The latest version of QEMU doesn't seem to support emulated SSE instructions
with HVF acceleration on macOS.
The decoder will treat SSE instructions as invalid, get the instruction sizes
wrong and quickly crash the guest OS because of illegal instructions.
After having a quick look at target/i386/hvf/x86_decode.c, it seems that SSE
instruction emulation isn't implemented in the current version of the x86
emulator.
A way to reproduce the issue is to run a macOS 10.13 guest with HVF
acceleration enabled, this will crash in the guest once it's loading
up the GUI (and also print a "Unimplemented handler" warning from
target/i386/hvf/x86_emu.c).
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