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X86: Add segmentation checks for ldt related descriptors and selectors.

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This commit is contained in:
Gabe Black 2009-02-25 10:21:21 -08:00
parent e08d60389d
commit bda7077c64
2 changed files with 14 additions and 2 deletions
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2
src/arch/x86/isa/microasm.isa
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@ -87,7 +87,7 @@ let {{
# Add in symbols for the various checks of segment selectors.
for check in ("NoCheck", "CSCheck", "CallGateCheck", "IntGateCheck",
"SoftIntGateCheck", "SSCheck", "IretCheck", "IntCSCheck",
"TRCheck", "TSSCheck"):
"TRCheck", "TSSCheck", "InGDTCheck", "LDTCheck"):
assembler.symbols[check] = "Seg%s" % check
for reg in ("TR", "IDTR"):

14
src/arch/x86/isa/microops/regop.isa
View file

@ -235,7 +235,7 @@ output header {{
enum SegmentSelectorCheck {
SegNoCheck, SegCSCheck, SegCallGateCheck, SegIntGateCheck,
SegSoftIntGateCheck, SegSSCheck, SegIretCheck, SegIntCSCheck,
SegTRCheck, SegTSSCheck
SegTRCheck, SegTSSCheck, SegInGDTCheck, SegLDTCheck
};
enum LongModeDescriptorType {
@ -1174,6 +1174,18 @@ let {{
fault = new GeneralProtection(selector);
}
break;
case SegInGDTCheck:
if (selector.ti) {
fault = new GeneralProtection(selector);
}
break;
case SegLDTCheck:
if (!desc.p) {
fault = new SegmentNotPresent(selector);
} else if (desc.type != 0x2) {
fault = new GeneralProtection(selector);
}
break;
default:
panic("Undefined segment check type.\\n");
}