X86: Add a check to chks which raises #GP(selector) if selector is NULL or not in the GDT.
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2 changed files with 9 additions and 2 deletions
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@ -86,7 +86,8 @@ let {{
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# Add in symbols for the various checks of segment selectors.
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# Add in symbols for the various checks of segment selectors.
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for check in ("NoCheck", "CSCheck", "CallGateCheck", "IntGateCheck",
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for check in ("NoCheck", "CSCheck", "CallGateCheck", "IntGateCheck",
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"SoftIntGateCheck", "SSCheck", "IretCheck", "IntCSCheck"):
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"SoftIntGateCheck", "SSCheck", "IretCheck", "IntCSCheck",
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"TRCheck"):
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assembler.symbols[check] = "Seg%s" % check
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assembler.symbols[check] = "Seg%s" % check
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for reg in ("TR", "IDTR"):
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for reg in ("TR", "IDTR"):
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@ -234,7 +234,8 @@ output header {{
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enum SegmentSelectorCheck {
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enum SegmentSelectorCheck {
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SegNoCheck, SegCSCheck, SegCallGateCheck, SegIntGateCheck,
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SegNoCheck, SegCSCheck, SegCallGateCheck, SegIntGateCheck,
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SegSoftIntGateCheck, SegSSCheck, SegIretCheck, SegIntCSCheck
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SegSoftIntGateCheck, SegSSCheck, SegIretCheck, SegIntCSCheck,
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SegTRCheck
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};
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};
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enum LongModeDescriptorType {
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enum LongModeDescriptorType {
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@ -1118,6 +1119,11 @@ let {{
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"in legacy mode.\\n");
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"in legacy mode.\\n");
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}
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}
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break;
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break;
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case SegTRCheck:
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if (!selector.si || selector.ti) {
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fault = new GeneralProtection(selector);
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}
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break;
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default:
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default:
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panic("Undefined segment check type.\\n");
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panic("Undefined segment check type.\\n");
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}
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}
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