From aa7bc1be74beac674cc4feb4fece534de10379e3 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Wed, 25 Feb 2009 10:17:14 -0800 Subject: [PATCH] X86: Implement the LTR instruction. --- src/arch/x86/isa/decoder/two_byte_opcodes.isa | 2 +- src/arch/x86/isa/insts/system/segmentation.py | 48 +++++++++++++++++++ 2 files changed, 49 insertions(+), 1 deletion(-) diff --git a/src/arch/x86/isa/decoder/two_byte_opcodes.isa b/src/arch/x86/isa/decoder/two_byte_opcodes.isa index 3cdfa48bb..67845fe8d 100644 --- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa +++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa @@ -94,7 +94,7 @@ 0x0: sldt_Mw_or_Rv(); 0x1: str_Mw_or_Rv(); 0x2: lldt_Mw_or_Rv(); - 0x3: ltr_Mw_or_Rv(); + 0x3: Inst::LTR(Ew); 0x4: verr_Mw_or_Rv(); 0x5: verw_Mw_or_Rv(); //0x6: jmpe_Ev(); // IA-64 diff --git a/src/arch/x86/isa/insts/system/segmentation.py b/src/arch/x86/isa/insts/system/segmentation.py index 49d8eb110..c2bb46b7c 100644 --- a/src/arch/x86/isa/insts/system/segmentation.py +++ b/src/arch/x86/isa/insts/system/segmentation.py @@ -168,6 +168,54 @@ def macroop LIDT_16_P wrlimit idtr, t1 }; +def macroop LTR_R +{ + chks reg, t0, TRCheck + 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, TSSCheck + wrdh t3, t1, t2 + wrdl tr, t1, reg + wrbase tr, t3, dataSize=8 + ori t1, t1, (1 << 9) + st t1, tsg, [8, t4, t0], dataSize=8 +}; + +def macroop LTR_M +{ + ld t5, seg, sib, disp, dataSize=2 + chks t5, t0, TRCheck + 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, TSSCheck + wrdh t3, t1, t2 + wrdl tr, t1, t5 + wrbase tr, t3, dataSize=8 + ori t1, t1, (1 << 9) + st t1, tsg, [8, t4, t0], dataSize=8 +}; + +def macroop LTR_P +{ + rdip t7 + ld t5, seg, riprel, disp, dataSize=2 + chks t5, t0, TRCheck + 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, TSSCheck + wrdh t3, t1, t2 + wrdl tr, t1, t5 + wrbase tr, t3, dataSize=8 + ori t1, t1, (1 << 9) + st t1, tsg, [8, t4, t0], dataSize=8 +}; + def macroop SWAPGS { rdval t1, kernel_gs_base, dataSize=8 -- 2.30.2