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X86: Implement the lldt instruction.

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Gabe Black
2009-02-25 10:21:27 -08:00
parent bda7077c64
commit 7aa875f4f3
2 changed files with 52 additions and 1 deletions
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2
src/arch/x86/isa/decoder/two_byte_opcodes.isa
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@@ -93,7 +93,7 @@
0x00: decode MODRM_REG {
0x0: sldt_Mw_or_Rv();
0x1: str_Mw_or_Rv();
0x2: lldt_Mw_or_Rv();
0x2: Inst::LLDT(Ew);
0x3: Inst::LTR(Ew);
0x4: verr_Mw_or_Rv();
0x5: verw_Mw_or_Rv();

51
src/arch/x86/isa/insts/system/segmentation.py
View File

@@ -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