perikiyoxd/exectos
1
0
Fork 0
forked from xt-sys/exectos
Code Pull Requests Activity

Update PTE mapping to allocate from PFN database

Browse Source
This commit is contained in:
Aiken Harris
2026-06-12 08:54:51 +02:00
parent 32f0b747a1
commit b0d2868f82
3 changed files with 68 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
xtoskrnl/mm/amd64/pte.cc
View File

@@ -176,6 +176,7 @@ MM::Pte::MapP5E(IN PVOID StartAddress,
IN PMMP5E TemplateP5e)
{
PMMP5E EndSpace, PointerP5e;
PFN_NUMBER PageFrameNumber;
/* Get P5E addresses */
PointerP5e = MM::Paging::GetP5eAddress(StartAddress);
@@ -187,8 +188,18 @@ MM::Pte::MapP5E(IN PVOID StartAddress,
/* Check if P5E is already mapped */
if(!MM::Paging::PteValid(PointerP5e))
{
/* Map P5E */
MM::Paging::SetPte(TemplateP5e, MM::Pfn::AllocateBootstrapPages(1), 0);
/* Attempt to allocate a physical page from the PFN database */
PageFrameNumber = MM::Pfn::AllocatePhysicalPage(0);
/* Check if the primary allocation failed */
if(!PageFrameNumber)
{
/* Allocate a physical page from the fallback allocator */
PageFrameNumber = MM::Pfn::AllocateBootstrapPages(1);
}
/* Update the template with new page frame and write the PTE */
MM::Paging::SetPte(TemplateP5e, PageFrameNumber, 0);
*PointerP5e = *TemplateP5e;
/* Clear the page table */
@@ -223,6 +234,7 @@ MM::Pte::MapPPE(IN PVOID StartAddress,
IN PMMPPE TemplatePpe)
{
PMMPPE EndSpace, PointerPpe;
PFN_NUMBER PageFrameNumber;
/* Get PPE addresses */
PointerPpe = MM::Paging::GetPpeAddress(StartAddress);
@@ -234,8 +246,18 @@ MM::Pte::MapPPE(IN PVOID StartAddress,
/* Check if PPE is already mapped */
if(!MM::Paging::PteValid(PointerPpe))
{
/* Map PPE */
MM::Paging::SetPte(TemplatePpe, MM::Pfn::AllocateBootstrapPages(1), 0);
/* Attempt to allocate a physical page from the PFN database */
PageFrameNumber = MM::Pfn::AllocatePhysicalPage(0);
/* Check if the primary allocation failed */
if(!PageFrameNumber)
{
/* Allocate a physical page from the fallback allocator */
PageFrameNumber = MM::Pfn::AllocateBootstrapPages(1);
}
/* Update the template with new page frame and write the PTE */
MM::Paging::SetPte(TemplatePpe, PageFrameNumber, 0);
*PointerPpe = *TemplatePpe;
/* Clear the page table */
@@ -270,6 +292,7 @@ MM::Pte::MapPXE(IN PVOID StartAddress,
IN PMMPXE TemplatePxe)
{
PMMPXE EndSpace, PointerPxe;
PFN_NUMBER PageFrameNumber;
/* Get PXE addresses */
PointerPxe = MM::Paging::GetPxeAddress(StartAddress);
@@ -281,8 +304,18 @@ MM::Pte::MapPXE(IN PVOID StartAddress,
/* Check if PTE is already mapped */
if(!MM::Paging::PteValid(PointerPxe))
{
/* Map PTE */
MM::Paging::SetPte(TemplatePxe, MM::Pfn::AllocateBootstrapPages(1), 0);
/* Attempt to allocate a physical page from the PFN database */
PageFrameNumber = MM::Pfn::AllocatePhysicalPage(0);
/* Check if the primary allocation failed */
if(!PageFrameNumber)
{
/* Allocate a physical page from the fallback allocator */
PageFrameNumber = MM::Pfn::AllocateBootstrapPages(1);
}
/* Update the template with new page frame and write the PTE */
MM::Paging::SetPte(TemplatePxe, PageFrameNumber, 0);
*PointerPxe = *TemplatePxe;
/* Clear the page table */

6
xtoskrnl/mm/mmgr.cc
View File

@@ -256,6 +256,9 @@ MM::Manager::InitializeMemoryManager(VOID)
/* Initialize page table */
MM::Pte::InitializePageTable();
/* Initialize PFN database */
MM::Pfn::InitializePfnDatabase();
/* Initialize system PTE space */
MM::Pte::InitializeSystemPteSpace();
@@ -265,9 +268,6 @@ MM::Manager::InitializeMemoryManager(VOID)
/* Initialize non-paged pool */
MM::Pool::InitializeNonPagedPool();
/* Initialize PFN database */
MM::Pfn::InitializePfnDatabase();
/* Initialize allocations tracking tables */
MM::Allocator::InitializeAllocationsTracking();
MM::Allocator::InitializeBigAllocationsTracking();

31
xtoskrnl/mm/pte.cc
View File

@@ -242,6 +242,7 @@ MM::Pte::MapPDE(IN PVOID StartAddress,
IN PMMPDE TemplatePde)
{
PMMPDE EndSpace, PointerPde;
PFN_NUMBER PageFrameNumber;
/* Get PDE addresses */
PointerPde = MM::Paging::GetPdeAddress(StartAddress);
@@ -253,8 +254,18 @@ MM::Pte::MapPDE(IN PVOID StartAddress,
/* Check if PDE is already mapped */
if(!MM::Paging::PteValid(PointerPde))
{
/* Map PDE */
MM::Paging::SetPte(TemplatePde, MM::Pfn::AllocateBootstrapPages(1), 0);
/* Attempt to allocate a physical page from the PFN database */
PageFrameNumber = MM::Pfn::AllocatePhysicalPage(0);
/* Check if the primary allocation failed */
if(!PageFrameNumber)
{
/* Allocate a physical page from the fallback allocator */
PageFrameNumber = MM::Pfn::AllocateBootstrapPages(1);
}
/* Update the template with new page frame and write the PTE */
MM::Paging::SetPte(TemplatePde, PageFrameNumber, 0);
MM::Paging::WritePte(PointerPde, *TemplatePde);
/* Clear the page table */
@@ -289,6 +300,7 @@ MM::Pte::MapPTE(IN PVOID StartAddress,
IN PMMPTE TemplatePte)
{
PMMPTE EndSpace, PointerPte;
PFN_NUMBER PageFrameNumber;
/* Get PTE addresses */
PointerPte = MM::Paging::GetPteAddress(StartAddress);
@@ -300,8 +312,18 @@ MM::Pte::MapPTE(IN PVOID StartAddress,
/* Check if PTE is already mapped */
if(!MM::Paging::PteValid(PointerPte))
{
/* Map PTE */
MM::Paging::SetPte(TemplatePte, MM::Pfn::AllocateBootstrapPages(1), 0);
/* Attempt to allocate a physical page from the PFN database */
PageFrameNumber = MM::Pfn::AllocatePhysicalPage(0);
/* Check if the primary allocation failed */
if(!PageFrameNumber)
{
/* Allocate a physical page from the fallback allocator */
PageFrameNumber = MM::Pfn::AllocateBootstrapPages(1);
}
/* Update the template with new page frame and write the PTE */
MM::Paging::SetPte(TemplatePte, PageFrameNumber, 0);
MM::Paging::WritePte(PointerPte, *TemplatePte);
/* Clear the page table */
@@ -313,7 +335,6 @@ MM::Pte::MapPTE(IN PVOID StartAddress,
}
}
/**
* Releases a block of system PTEs into a specified pool.
*