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gdt.js: display segment attributes #4

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Oct 28, 2021
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gdt.js: display segment attributes #4

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16 changes: 10 additions & 6 deletions gdt/gdt.js
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Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,9 @@ class GdtEntry {
const BaseMiddle = Entry.Bytes.BaseMiddle.bitwiseShiftLeft(16);
const BaseLow = Entry.BaseLow;
this._Base = BaseUpper.add(BaseHigh).add(BaseMiddle).add(BaseLow);
const Flags1 = Entry.Bytes.Flags1;
const Flags2 = Entry.Bytes.Flags2.bitwiseShiftLeft(8);
this._Attrs = Flags2.add(Flags1);
}

toString() {
Expand All @@ -99,13 +102,14 @@ class GdtEntry {
// valid offsets from 0 to 4095.
const Size = this._Limit * Increments + (this._Granularity ? 0xfff : 0);
let S = `dt nt!_KGDTENTRY64 ${hex(this._Addr)}
Base: [${hex(this._Base)} -> ${hex(this._Base.add(Size))}]
Type: ${this._TypeS} (${hex(this._Type)})
DPL: ${hex(this._Dpl)}
Present: ${hex(this._Present)}`;
if (this._TypeS.startsWith('Code')) {
Base: [${hex(this._Base)} -> ${hex(this._Base.add(Size))}]
Type: ${this._TypeS} (${hex(this._Type)})
DPL: ${hex(this._Dpl)}
Present: ${hex(this._Present)}
Atributes: ${hex(this._Attrs)}`;
if (this._TypeS.startsWith('Code')) {
S += `
Mode: ${this._LongMode ? '64b' : (this._DefaultBig ? '32b Compat' : '16b Compat')}`
Mode: ${this._LongMode ? '64b' : (this._DefaultBig ? '32b Compat' : '16b Compat')}`
}
return S;
}
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