From 7aa875f4f3598c8ca6e3ba8946cf6eb3697a7696 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Wed, 25 Feb 2009 10:21:27 -0800 Subject: X86: Implement the lldt instruction. --- src/arch/x86/isa/insts/system/segmentation.py | 51 +++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) (limited to 'src/arch/x86/isa/insts/system') diff --git a/src/arch/x86/isa/insts/system/segmentation.py b/src/arch/x86/isa/insts/system/segmentation.py index 7c13765ca..acbca9f6e 100644 --- a/src/arch/x86/isa/insts/system/segmentation.py +++ b/src/arch/x86/isa/insts/system/segmentation.py @@ -216,6 +216,57 @@ def macroop LTR_P st t1, tsg, [8, t4, t0], dataSize=8 }; +def macroop LLDT_R +{ + chks reg, t0, InGDTCheck, flags=(EZF,) + br label("end"), flags=(CEZF,) + limm t4, 0 + srli t4, reg, 3, dataSize=2 + ldst t1, tsg, [8, t4, t0], dataSize=8 + ld t2, tsg, [8, t4, t0], 8, dataSize=8 + chks reg, t1, LDTCheck + wrdh t3, t1, t2 + wrdl tr, t1, reg + wrbase tr, t3, dataSize=8 +end: + fault "NoFault" +}; + +def macroop LLDT_M +{ + ld t5, seg, sib, disp, dataSize=2 + chks t5, t0, InGDTCheck, flags=(EZF,) + br label("end"), flags=(CEZF,) + limm t4, 0 + srli t4, t5, 3, dataSize=2 + ldst t1, tsg, [8, t4, t0], dataSize=8 + ld t2, tsg, [8, t4, t0], 8, dataSize=8 + chks t5, t1, LDTCheck + wrdh t3, t1, t2 + wrdl tr, t1, t5 + wrbase tr, t3, dataSize=8 +end: + fault "NoFault" +}; + +def macroop LLDT_P +{ + rdip t7 + ld t5, seg, riprel, disp, dataSize=2 + chks t5, t0, InGDTCheck, flags=(EZF,) + br label("end"), flags=(CEZF,) + limm t4, 0 + srli t4, t5, 3, dataSize=2 + ldst t1, tsg, [8, t4, t0], dataSize=8 + ld t2, tsg, [8, t4, t0], 8, dataSize=8 + chks t5, t1, LDTCheck + wrdh t3, t1, t2 + wrdl tr, t1, t5 + wrbase tr, t3, dataSize=8 +end: + fault "NoFault" +}; + def macroop SWAPGS { rdval t1, kernel_gs_base, dataSize=8 -- cgit v1.2.3