xt-sys/exectos
3
5
Fork 2
Code Issues 7 Pull Requests 1 Actions Projects 1 Releases Wiki Activity

Add support for transitioning PTE to invalid state
All checks were successful
Builds / ExectOS (amd64, release) (push) Successful in 35s
Details
Builds / ExectOS (i686, release) (push) Successful in 33s
Details
Builds / ExectOS (amd64, debug) (push) Successful in 44s
Details
Builds / ExectOS (i686, debug) (push) Successful in 41s
Details

Browse Source
This commit is contained in:
Aiken Harris
2026-01-03 00:41:56 +01:00
parent 0159262ee0
commit cc76ea40ee
7 changed files with 213 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
xtoskrnl/includes/mm/amd64/pagemap.hh
View File

@@ -44,6 +44,7 @@ namespace MM
PMMPTE StartPte);
XTAPI ULONG GetPteOffset(IN PVOID Address);
XTAPI ULONG GetPteSize(VOID);
XTAPI ULONG GetPteSoftwareProtection(IN PMMPTE PtePointer);
XTAPI ULONG GetPteSoftwarePrototype(IN PMMPTE PtePointer);
XTAPI ULONG GetPteSoftwareTransition(IN PMMPTE PtePointer);
VIRTUAL XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer) = 0;
@@ -65,6 +66,8 @@ namespace MM
XTAPI VOID SetPteCaching(IN PMMPTE PtePointer,
IN BOOLEAN CacheDisable,
IN BOOLEAN WriteThrough);
XTAPI VOID TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection);
XTAPI VOID WritePte(IN PMMPTE Pte,
IN MMPTE Value);
} PAGEMAP, *PPAGEMAP;

3
xtoskrnl/includes/mm/amd64/paging.hh
View File

@@ -41,6 +41,7 @@ namespace MM
STATIC XTAPI LONG GetPteDistance(PMMPTE EndPte,
PMMPTE StartPte);
STATIC XTAPI ULONG GetPteSize(VOID);
STATIC XTAPI ULONG GetPteSoftwareProtection(IN PMMPTE PtePointer);
STATIC XTAPI ULONG GetPteSoftwarePrototype(IN PMMPTE PtePointer);
STATIC XTAPI ULONG GetPteSoftwareTransition(IN PMMPTE PtePointer);
STATIC XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
@@ -63,6 +64,8 @@ namespace MM
IN BOOLEAN WriteThrough);
STATIC XTAPI VOID WritePte(IN PMMPTE Pte,
IN MMPTE Value);
STATIC XTAPI VOID TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection);
STATIC XTFASTCALL VOID ZeroPages(IN PVOID Address,
IN ULONG Size);

9
xtoskrnl/includes/mm/i686/pagemap.hh
View File

@@ -41,6 +41,7 @@ namespace MM
VIRTUAL XTAPI LONG GetPteDistance(PMMPTE EndPte,
PMMPTE StartPte) = 0;
VIRTUAL XTAPI ULONG GetPteSize(VOID) = 0;
VIRTUAL XTAPI ULONG GetPteSoftwareProtection(IN PMMPTE PtePointer) = 0;
VIRTUAL XTAPI ULONG GetPteSoftwarePrototype(IN PMMPTE PtePointer) = 0;
VIRTUAL XTAPI ULONG GetPteSoftwareTransition(IN PMMPTE PtePointer) = 0;
VIRTUAL XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer) = 0;
@@ -59,6 +60,8 @@ namespace MM
VIRTUAL XTAPI VOID SetPteCaching(IN PMMPTE PtePointer,
IN BOOLEAN CacheDisable,
IN BOOLEAN WriteThrough) = 0;
VIRTUAL XTAPI VOID TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection) = 0;
VIRTUAL XTAPI VOID WritePte(IN PMMPTE Pte,
IN MMPTE Value) = 0;
@@ -79,6 +82,7 @@ namespace MM
XTAPI LONG GetPteDistance(PMMPTE EndPte,
PMMPTE StartPte);
XTAPI ULONG GetPteSize(VOID);
XTAPI ULONG GetPteSoftwareProtection(IN PMMPTE PtePointer);
XTAPI ULONG GetPteSoftwarePrototype(IN PMMPTE PtePointer);
XTAPI ULONG GetPteSoftwareTransition(IN PMMPTE PtePointer);
XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
@@ -96,6 +100,8 @@ namespace MM
XTAPI VOID SetPteCaching(IN PMMPTE PtePointer,
IN BOOLEAN CacheDisable,
IN BOOLEAN WriteThrough);
XTAPI VOID TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection);
XTAPI VOID WritePte(IN PMMPTE Pte,
IN MMPTE Value);
};
@@ -115,6 +121,7 @@ namespace MM
XTAPI LONG GetPteDistance(PMMPTE EndPte,
PMMPTE StartPte);
XTAPI ULONG GetPteSize(VOID);
XTAPI ULONG GetPteSoftwareProtection(IN PMMPTE PtePointer);
XTAPI ULONG GetPteSoftwarePrototype(IN PMMPTE PtePointer);
XTAPI ULONG GetPteSoftwareTransition(IN PMMPTE PtePointer);
XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
@@ -132,6 +139,8 @@ namespace MM
XTAPI VOID SetPteCaching(IN PMMPTE PtePointer,
IN BOOLEAN CacheDisable,
IN BOOLEAN WriteThrough);
XTAPI VOID TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection);
XTAPI VOID WritePte(IN PMMPTE Pte,
IN MMPTE Value);
};

3
xtoskrnl/includes/mm/i686/paging.hh
View File

@@ -39,6 +39,7 @@ namespace MM
STATIC XTAPI LONG GetPteDistance(PMMPTE EndPte,
PMMPTE StartPte);
STATIC XTAPI ULONG GetPteSize(VOID);
STATIC XTAPI ULONG GetPteSoftwareProtection(IN PMMPTE PtePointer);
STATIC XTAPI ULONG GetPteSoftwarePrototype(IN PMMPTE PtePointer);
STATIC XTAPI ULONG GetPteSoftwareTransition(IN PMMPTE PtePointer);
STATIC XTAPI PVOID GetPteVirtualAddress(IN PMMPTE PtePointer);
@@ -59,6 +60,8 @@ namespace MM
IN BOOLEAN WriteThrough);
STATIC XTAPI VOID WritePte(IN PMMPTE Pte,
IN MMPTE Value);
STATIC XTAPI VOID TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection);
STATIC XTFASTCALL VOID ZeroPages(IN PVOID Address,
IN ULONG Size);

51
xtoskrnl/mm/amd64/pagemap.cc
View File

@@ -363,6 +363,24 @@ MM::PageMap::GetPteSize(VOID)
return sizeof(MMPTE);
}
/**
* Gets the software protection value of the corresponding Page Table Entry.
*
* @param PtePointer
* Specifies the address of the PTE.
*
* @return This routine returns the PTE software protection value.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMap::GetPteSoftwareProtection(IN PMMPTE PtePointer)
{
/* Return PTE software protection value */
return (ULONG)PtePointer->Software.Protection;
}
/**
* Gets the software prototype value of the corresponding Page Table Entry.
*
@@ -377,6 +395,7 @@ XTAPI
ULONG
MM::PageMap::GetPteSoftwarePrototype(IN PMMPTE PtePointer)
{
/* Return PTE software prototype value */
return (ULONG)PtePointer->Software.Prototype;
}
@@ -394,6 +413,7 @@ XTAPI
ULONG
MM::PageMap::GetPteSoftwareTransition(IN PMMPTE PtePointer)
{
/* Return PTE software transition value */
return (ULONG)PtePointer->Software.Transition;
}
@@ -588,6 +608,37 @@ MM::PageMap::SetPteCaching(IN PMMPTE PtePointer,
PtePointer->Hardware.WriteThrough = WriteThrough;
}
/**
* Transitions a Page Table Entry (PTE) to invalid state
*
* @param PointerPte
* Pointer to the page table entry (PTE) to transition.
*
* @param Protection
* Specifies the protection attribute to apply to the PTE.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMap::TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection)
{
MMPTE TempPte;
/* Set transition PTE */
TempPte = *PointerPte;
TempPte.Software.Protection = Protection;
TempPte.Software.Prototype = 0;
TempPte.Software.Transition = 1;
TempPte.Software.Valid = 0;
/* Write PTE value */
*PointerPte = TempPte;
}
/**
* Writes a Page Table Entry (PTE) with the specified value.
*

102
xtoskrnl/mm/i686/pagemap.cc
View File

@@ -355,6 +355,24 @@ MM::PageMapBasic::GetPteSize(VOID)
return sizeof(MMPML2_PTE);
}
/**
* Gets the software protection value of the corresponding Page Table Entry.
*
* @param PtePointer
* Specifies the address of the PTE.
*
* @return This routine returns the PTE software protection value.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMapBasic::GetPteSoftwareProtection(IN PMMPTE PtePointer)
{
/* Return PTE software protection value */
return (ULONG)PtePointer->Pml2.Software.Protection;
}
/**
* Gets the software prototype value of the corresponding Page Table Entry.
*
@@ -369,6 +387,7 @@ XTAPI
ULONG
MM::PageMapBasic::GetPteSoftwarePrototype(IN PMMPTE PtePointer)
{
/* Return PTE software prototype value */
return (ULONG)PtePointer->Pml2.Software.Prototype;
}
@@ -386,6 +405,7 @@ XTAPI
ULONG
MM::PageMapBasic::GetPteSoftwareTransition(IN PMMPTE PtePointer)
{
/* Return PTE software transition value */
return (ULONG)PtePointer->Pml2.Software.Transition;
}
@@ -571,6 +591,37 @@ MM::PageMapBasic::SetPteCaching(IN PMMPTE PtePointer,
PtePointer->Pml2.Hardware.WriteThrough = WriteThrough;
}
/**
* Transitions a Page Table Entry (PTE) to invalid state
*
* @param PointerPte
* Pointer to the page table entry (PTE) to transition.
*
* @param Protection
* Specifies the protection attribute to apply to the PTE.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMapBasic::TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection)
{
MMPTE TempPte;
/* Set transition PTE */
TempPte = *PointerPte;
TempPte.Pml2.Software.Protection = Protection;
TempPte.Pml2.Software.Prototype = 0;
TempPte.Pml2.Software.Transition = 1;
TempPte.Pml2.Software.Valid = 0;
/* Write PTE value */
*PointerPte = TempPte;
}
/**
* Writes a PML2 page table entry (PTE) with the specified value.
*
@@ -777,6 +828,24 @@ MM::PageMapXpa::GetPteSize(VOID)
return sizeof(MMPML3_PTE);
}
/**
* Gets the software protection value of the corresponding Page Table Entry.
*
* @param PtePointer
* Specifies the address of the PTE.
*
* @return This routine returns the PTE software protection value.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::PageMapXpa::GetPteSoftwareProtection(IN PMMPTE PtePointer)
{
/* Return PTE software protection value */
return (ULONG)PtePointer->Pml3.Software.Protection;
}
/**
* Gets the software prototype value of the corresponding Page Table Entry.
*
@@ -791,6 +860,7 @@ XTAPI
ULONG
MM::PageMapXpa::GetPteSoftwarePrototype(IN PMMPTE PtePointer)
{
/* Return PTE software prototype value */
return (ULONG)PtePointer->Pml3.Software.Prototype;
}
@@ -808,6 +878,7 @@ XTAPI
ULONG
MM::PageMapXpa::GetPteSoftwareTransition(IN PMMPTE PtePointer)
{
/* Return PTE software transition value */
return (ULONG)PtePointer->Pml3.Software.Transition;
}
@@ -992,6 +1063,37 @@ MM::PageMapXpa::SetPteCaching(IN PMMPTE PtePointer,
PtePointer->Pml3.Hardware.WriteThrough = WriteThrough;
}
/**
* Transitions a Page Table Entry (PTE) to invalid state
*
* @param PointerPte
* Pointer to the page table entry (PTE) to transition.
*
* @param Protection
* Specifies the protection attribute to apply to the PTE.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::PageMapXpa::TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection)
{
MMPTE TempPte;
/* Set transition PTE */
TempPte = *PointerPte;
TempPte.Pml3.Software.Protection = Protection;
TempPte.Pml3.Software.Prototype = 0;
TempPte.Pml3.Software.Transition = 1;
TempPte.Pml3.Software.Valid = 0;
/* Write PTE value */
*PointerPte = TempPte;
}
/**
* Writes a PML3 page table entry (PTE) with the specified value.
*

42
xtoskrnl/mm/paging.cc
View File

@@ -366,6 +366,24 @@ MM::Paging::GetPteSize(VOID)
return PmlRoutines->GetPteSize();
}
/**
* Gets the software protection value of the corresponding Page Table Entry.
*
* @param PtePointer
* Specifies the address of the PTE.
*
* @return This routine returns the PTE software protection value.
*
* @since XT 1.0
*/
XTAPI
ULONG
MM::Paging::GetPteSoftwareProtection(IN PMMPTE PtePointer)
{
/* Return PTE software protection value */
return PmlRoutines->GetPteSoftwareProtection(PtePointer);
}
/**
* Gets the software prototype value of the corresponding Page Table Entry.
*
@@ -380,6 +398,7 @@ XTAPI
ULONG
MM::Paging::GetPteSoftwarePrototype(IN PMMPTE PtePointer)
{
/* Return PTE software prototype value */
return PmlRoutines->GetPteSoftwarePrototype(PtePointer);
}
@@ -397,6 +416,7 @@ XTAPI
ULONG
MM::Paging::GetPteSoftwareTransition(IN PMMPTE PtePointer)
{
/* Return PTE software transition value */
return PmlRoutines->GetPteSoftwareTransition(PtePointer);
}
@@ -594,6 +614,28 @@ MM::Paging::SetPteCaching(IN PMMPTE PtePointer,
PmlRoutines->SetPteCaching(PtePointer, CacheDisable, WriteThrough);
}
/**
* Transitions a Page Table Entry (PTE) to invalid state
*
* @param PointerPte
* Pointer to the page table entry (PTE) to transition.
*
* @param Protection
* Specifies the protection attribute to apply to the PTE.
*
* @return This routine does not return any value.
*
* @since XT 1.0
*/
XTAPI
VOID
MM::Paging::TransitionPte(IN PMMPTE PointerPte,
IN ULONG_PTR Protection)
{
/* Transition PTE */
PmlRoutines->TransitionPte(PointerPte, Protection);
}
/**
* Writes a Page Table Entry (PTE) with the specified value.
*