Gabe Black has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/55810 )
(
11 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the
submitted one.
)Change subject: arch-x86: Detect when entering virtual 8086 mode.
..
arch-x86: Detect when entering virtual 8086 mode.
If we're entering virtual 8086 mode, panic. Some aspects of that mode
may actually work, but since it's essentially untested, lets be extra
cautious.
Change-Id: I78bbfcb75db8370f4271c75caabc0ec53f75a884
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/55810
Reviewed-by: Matthew Poremba
Maintainer: Gabe Black
Tested-by: kokoro
---
M src/arch/x86/isa.cc
1 file changed, 23 insertions(+), 0 deletions(-)
Approvals:
Matthew Poremba: Looks good to me, approved
Gabe Black: Looks good to me, approved
kokoro: Regressions pass
diff --git a/src/arch/x86/isa.cc b/src/arch/x86/isa.cc
index 713346e..f426137 100644
--- a/src/arch/x86/isa.cc
+++ b/src/arch/x86/isa.cc
@@ -318,6 +318,12 @@
break;
case MISCREG_CR8:
break;
+ case MISCREG_RFLAGS:
+{
+RFLAGS rflags = val;
+panic_if(rflags.vm, "Virtual 8086 mode is not supported.");
+break;
+}
case MISCREG_CS_ATTR:
{
SegAttr toggled = regVal[miscReg] ^ val;
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I78bbfcb75db8370f4271c75caabc0ec53f75a884
Gerrit-Change-Number: 55810
Gerrit-PatchSet: 14
Gerrit-Owner: Gabe Black
Gerrit-Reviewer: Bradford Beckmann
Gerrit-Reviewer: Gabe Black
Gerrit-Reviewer: Matt Sinclair
Gerrit-Reviewer: Matthew Poremba
Gerrit-Reviewer: kokoro
Gerrit-MessageType: merged
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