Gabe Black has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/55887 )
Change subject: arch-x86: Fix a bug in the protected mode IRET.
......................................................................
arch-x86: Fix a bug in the protected mode IRET.
Fix the direction of the comparison which makes sure the new RIP will
fit within the new CS limit.
Change-Id: I3f3e66c185d0e1fbc430b0ae594d63cdd62b9dfd
---
M
src/arch/x86/isa/insts/general_purpose/control_transfer/interrupts_and_exceptions.py
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git
a/src/arch/x86/isa/insts/general_purpose/control_transfer/interrupts_and_exceptions.py
b/src/arch/x86/isa/insts/general_purpose/control_transfer/interrupts_and_exceptions.py
index 815f291..7184849 100644
---
a/src/arch/x86/isa/insts/general_purpose/control_transfer/interrupts_and_exceptions.py
+++
b/src/arch/x86/isa/insts/general_purpose/control_transfer/interrupts_and_exceptions.py
@@ -156,7 +156,7 @@
# appropriate/other RIP checks.
# if temp_RIP > CS.limit throw #GP(0)
rdlimit t6, cs, dataSize=8
- sub t0, t1, t6, flags=(ECF,)
+ sub t0, t6, t1, flags=(ECF,)
fault "std::make_shared<GeneralProtection>(0)", flags=(CECF,)
#(temp_CPL!=CPL)
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I3f3e66c185d0e1fbc430b0ae594d63cdd62b9dfd
Gerrit-Change-Number: 55887
Gerrit-PatchSet: 1
Gerrit-Owner: Gabe Black <gabe.bl...@gmail.com>
Gerrit-MessageType: newchange
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