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Fix entries in Global Descriptor Table (GDT)

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This commit is contained in:
Rafal Kupiec
2023-02-01 20:24:55 +01:00
parent 21fbe6febe
commit e2813bcdaa
3 changed files with 30 additions and 33 deletions
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20
xtoskrnl/ar/amd64/procsup.c
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@@ -76,10 +76,10 @@ VOID
ArpInitializeGdt(IN PKPROCESSOR_BLOCK ProcessorBlock)
{
/* Initialize GDT entries */
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_NULL, 0x0, 0x0, KGDT_TYPE_NONE, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_CODE, 0x0, 0x0, KGDT_TYPE_CODE, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_DATA, 0x0, 0x0, KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CODE, 0x0, 0x0, KGDT_TYPE_CODE, KGDT_DPL_USER, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_NULL, 0x0, 0x0, KGDT_TYPE_NONE, KGDT_DPL_SYSTEM, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_CODE, 0x0, 0x0, KGDT_TYPE_CODE, KGDT_DPL_SYSTEM, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_DATA, 0x0, 0x0, KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CODE, 0x0, 0x0, KGDT_TYPE_CODE, KGDT_DPL_USER, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_DATA, 0x0, 0xFFFFFFFF, KGDT_TYPE_DATA, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CMCODE, 0x0, 0xFFFFFFFF, KGDT_TYPE_CODE, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CMTEB, 0x0, 0x0FFF, KGDT_TYPE_DATA, KGDT_DPL_USER, 2);
@@ -224,7 +224,7 @@ XTAPI
VOID
ArpSetGdtEntry(IN PKGDTENTRY Gdt,
IN USHORT Selector,
IN ULONGLONG Base,
IN ULONG_PTR Base,
IN ULONG Limit,
IN UCHAR Type,
IN UCHAR Dpl,
@@ -247,12 +247,12 @@ ArpSetGdtEntry(IN PKGDTENTRY Gdt,
}
/* Get GDT entry */
GdtEntry = (PKGDTENTRY)((ULONGLONG)Gdt + (Selector & ~RPL_MASK));
GdtEntry = (PKGDTENTRY)((ULONG_PTR)Gdt + (Selector & ~RPL_MASK));
/* Set GDT descriptor base */
GdtEntry->BaseLow = Base & 0xFFFF;
GdtEntry->Bits.BaseMiddle = (Base >> 16) & 0xFF;
GdtEntry->Bits.BaseHigh = (Base >> 24) & 0xFF;
GdtEntry->Bytes.BaseMiddle = (Base >> 16) & 0xFF;
GdtEntry->Bytes.BaseHigh = (Base >> 24) & 0xFF;
GdtEntry->BaseUpper = Base >> 32;
/* Set descriptor limit */
@@ -260,10 +260,10 @@ ArpSetGdtEntry(IN PKGDTENTRY Gdt,
GdtEntry->Bits.LimitHigh = (Limit >> 16) & 0xF;
/* Initialize GDT entry */
GdtEntry->Bits.DefaultBig = (SegmentMode & 2);
GdtEntry->Bits.DefaultBig = !!(SegmentMode & 2);
GdtEntry->Bits.Dpl = (Dpl & 0x3);
GdtEntry->Bits.Granularity = Granularity;
GdtEntry->Bits.LongMode = (SegmentMode & 1);
GdtEntry->Bits.LongMode = !!(SegmentMode & 1);
GdtEntry->Bits.Present = (Type != 0);
GdtEntry->Bits.System = 0;
GdtEntry->Bits.Type = (Type & 0x1F);