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[Qemu-discuss] qemu x86 STI followed by RET fails to enable interrupts.
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From: |
alarson |
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Subject: |
[Qemu-discuss] qemu x86 STI followed by RET fails to enable interrupts. |
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Date: |
Tue, 17 Sep 2019 20:54:29 -0500 |
One of my developers has reported that when qemu x86 (version 3.0.0) sees
an STI instruction (enable interrupts, but defer one instruction before
doing so), and the next instruction is a RET (return from subroutine),
then interrupts are never enabled. If a "nop" is inserted between the STI
and the RET, then everything works as expected. I checked the changelog
from 4.1.0 back to 3.0.0 and I didn't see a fix for this.
If anyone has a quick patch, I'd be happy to check it out :-)
- [Qemu-discuss] qemu x86 STI followed by RET fails to enable interrupts.,
alarson <=