diff options
author | Tim Harris <tharris@microsoft.com> | 2011-02-07 15:05:28 -0800 |
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committer | Tim Harris <tharris@microsoft.com> | 2011-02-07 15:05:28 -0800 |
commit | 5810ab121c39f041aa6728696bc19e2e963eef90 (patch) | |
tree | fe4d1c6ea7e109d84c5516b4fa59361c732f8016 /src/arch/x86/isa | |
parent | 10b4b364d9d42bcefda7ff18e1de9152dc6456d1 (diff) | |
download | gem5-5810ab121c39f041aa6728696bc19e2e963eef90.tar.xz |
X86: Read the LDT/GDT at CPL0 when executing an iret.
During iret access LDT/GDT at CPL0 rather than after transition to user mode
(if I'm reading the Intel IA-64 architecture spec correctly, the contents of
the descriptor table are read before the CPL is updated).
Diffstat (limited to 'src/arch/x86/isa')
-rw-r--r-- | src/arch/x86/isa/insts/general_purpose/control_transfer/interrupts_and_exceptions.py | 8 |
1 files changed, 4 insertions, 4 deletions
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 f8bafa540..19a344008 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 @@ -102,10 +102,10 @@ protToVirtFallThrough: andi t6, t2, 0xF8, dataSize=8 andi t0, t2, 0x4, flags=(EZF,), dataSize=2 br label("globalCSDescriptor"), flags=(CEZF,) - ld t8, tsl, [1, t0, t6], dataSize=8 + ld t8, tsl, [1, t0, t6], dataSize=8, atCPL0=True br label("processCSDescriptor") globalCSDescriptor: - ld t8, tsg, [1, t0, t6], dataSize=8 + ld t8, tsg, [1, t0, t6], dataSize=8, atCPL0=True processCSDescriptor: chks t2, t6, dataSize=8 @@ -159,10 +159,10 @@ doPopStackStuff: andi t7, t9, 0xF8, dataSize=8 andi t0, t9, 0x4, flags=(EZF,), dataSize=2 br label("globalSSDescriptor"), flags=(CEZF,) - ld t7, tsl, [1, t0, t7], dataSize=8 + ld t7, tsl, [1, t0, t7], dataSize=8, atCPL0=True br label("processSSDescriptor") globalSSDescriptor: - ld t7, tsg, [1, t0, t7], dataSize=8 + ld t7, tsg, [1, t0, t7], dataSize=8, atCPL0=True processSSDescriptor: chks t9, t7, dataSize=8 |