Public bug reported:
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).
** Affects: qemu
Importance: Undecided
Status: New
** Summary changed:
- Illegal Instruction with HVF when encountering SSE instructions in Privileged
Mode
+ Illegal Instruction with HVF when encountering SSE instructions in the
emulator
** Description changed:
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 once it's loading up the GUI.
+ 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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https://bugs.launchpad.net/bugs/1759333
Title:
Illegal Instruction with HVF when encountering SSE instructions in the
emulator
Status in QEMU:
New
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).
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1759333/+subscriptions
