static ZVMSTATUS HvmSetupGdt (
PCPU Cpu
)
{
uint64_t GuestTssBase;
uint8_t GuestTssLimit;
PSEGMENT_DESCRIPTOR GuestTssDescriptor;
if (!Cpu || !Cpu->GdtArea)
return ZVM_INVALID_PARAMETER;
memcpy (Cpu->GdtArea, (void *) GetGdtBase(), GetGdtLimit());
CmReloadGdtr(Cpu->GdtArea, GetGdtLimit());//加载Cpu->GdtArea中的GDT表
return ZVMSUCCESS;
}
/**
* effects: Clone GDT into CPU Struct
*/
static NTSTATUS _HvmSetupGdt (
PCPU Cpu
)
{ //Finish
ULONG64 GuestTssBase;
USHORT GuestTssLimit;
PSEGMENT_DESCRIPTOR GuestTssDescriptor;
if (!Cpu || !Cpu->GdtArea)
return STATUS_INVALID_PARAMETER;
memcpy (Cpu->GdtArea, (PVOID) GetGdtBase(), GetGdtLimit());
CmReloadGdtr(Cpu->GdtArea, GetGdtLimit());
return STATUS_SUCCESS;
//#if DEBUG_LEVEL>2
// CmDumpGdt ((PUCHAR)GetGdtBase(), 0x67); //(USHORT)GetGdtLimit());
//#endif
//
// // set code and stack selectors the same with NT to simplify our unloading
// CmSetGdtEntry (Cpu->GdtArea,
// BP_GDT_LIMIT,
// BP_GDT64_CODE,
// 0, 0, LA_STANDARD | LA_DPL_0 | LA_CODE | LA_PRESENT | LA_READABLE | LA_ACCESSED, HA_LONG);
//
// // we don't want to have a separate segment for DS and ES. They will be equal to SS.
// CmSetGdtEntry (Cpu->GdtArea,
// BP_GDT_LIMIT,
// BP_GDT64_DATA,
// 0, 0xfffff, LA_STANDARD | LA_DPL_0 | LA_PRESENT | LA_WRITABLE | LA_ACCESSED, HA_GRANULARITY | HA_DB);
//
// // fs
// CmSetGdtEntry (Cpu->GdtArea,
// BP_GDT_LIMIT,
// KGDT64_R3_CMTEB, 0, 0x3c00, LA_STANDARD | LA_DPL_3 | LA_PRESENT | LA_WRITABLE | LA_ACCESSED, HA_DB);
//
// // gs
// CmSetGdtEntry (Cpu->GdtArea,
// BP_GDT_LIMIT,
// KGDT64_R3_DATA,
// 0, 0xfffff, LA_STANDARD | LA_DPL_3 | LA_PRESENT | LA_WRITABLE | LA_ACCESSED, HA_GRANULARITY | HA_DB);
//
// GuestTssDescriptor = (PSEGMENT_DESCRIPTOR) (GetGdtBase () + GetTrSelector ());
//
// GuestTssBase = GuestTssDescriptor->base0 | GuestTssDescriptor->base1 << 16 | GuestTssDescriptor->base2 << 24;
// GuestTssLimit = GuestTssDescriptor->limit0 | (GuestTssDescriptor->limit1attr1 & 0xf) << 16;
// if (GuestTssDescriptor->limit1attr1 & 0x80)
// // 4096-bit granularity is enabled for this segment, scale the limit
// GuestTssLimit <<= 12;
//
// if (!(GuestTssDescriptor->attr0 & 0x10))
// {
// GuestTssBase = (*(PULONG64) ((PUCHAR) GuestTssDescriptor + 4)) & 0xffffffffff000000;
// GuestTssBase |= (*(PULONG32) ((PUCHAR) GuestTssDescriptor + 2)) & 0x00ffffff;
// }
//#if DEBUG_LEVEL>2
// CmDumpTSS64 ((PTSS64) GuestTssBase, GuestTssLimit);
//#endif
//
// MmMapGuestTSS64 ((PTSS64) GuestTssBase, GuestTssLimit);
//
// // don't need to reload TR - we use 0x40, as in xp/vista.
// CmSetGdtEntry (Cpu->GdtArea, BP_GDT_LIMIT, BP_GDT64_SYS_TSS, (PVOID) GuestTssBase, GuestTssLimit, //BP_TSS_LIMIT,
// LA_BTSS64 | LA_DPL_0 | LA_PRESENT | LA_ACCESSED, 0);
//
// // so far, we have 5 GDT entries.
// // 0x10: CODE64 cpl0 CS
// // 0x18: DATA dpl0 DS, ES, SS
// // 0x28: DATA dpl3 GS
// // 0x40: Busy TSS64, base is equal to NT TSS TR
// // 0x50: DATA dpl3 FS
//
//#if DEBUG_LEVEL>2
// CmDumpGdt ((PUCHAR) Cpu->GdtArea, BP_GDT_LIMIT);
//#endif
//
// CmReloadGdtr (Cpu->GdtArea, BP_GDT_LIMIT);
//
// // set new DS and ES
// CmSetBluepillESDS ();
//
// // we will use GS as our PCR pointer; GS base will be set to the Cpu in HvmEventCallback
// // FIXME: but it is not?
//
// return STATUS_SUCCESS;
}
