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

Zero-initialize Page Directory entries before use
All checks were successful
Builds / ExectOS (amd64, debug) (push) Successful in 43s
Details
Builds / ExectOS (amd64, release) (push) Successful in 41s
Details
Builds / ExectOS (i686, debug) (push) Successful in 44s
Details
Builds / ExectOS (i686, release) (push) Successful in 41s
Details

Browse Source
This commit is contained in:
Aiken Harris 2025-07-30 16:49:49 +02:00 committed by CodingWorkshop Signing Team
parent c8787c3bd6
commit 3607a6d930
Signed by: CodingWorkshop Signing Team
GPG Key ID: 6DC88369C82795D2
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
xtldr/modules/xtos_o/i686/memory.c
View File

@ -24,6 +24,7 @@ EFI_STATUS
XtpMapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
{
EFI_PHYSICAL_ADDRESS Address;
PHARDWARE_LEGACY_PTE LegacyPdeBase;
PHARDWARE_PTE PdeBase;
XTSTATUS Status;
@ -45,6 +46,7 @@ XtpMapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
PdeBase = (PHARDWARE_PTE)(((PHARDWARE_PTE)PageMap->PtePointer)[MM_HARDWARE_VA_START >> MM_PPI_SHIFT].PageFrameNumber << MM_PAGE_SHIFT);
/* Make PDE valid */
RtlZeroMemory(&PdeBase[(MM_HARDWARE_VA_START >> MM_PDI_SHIFT) & 0x1FF], sizeof(HARDWARE_PTE));
PdeBase[(MM_HARDWARE_VA_START >> MM_PDI_SHIFT) & 0x1FF].PageFrameNumber = Address >> MM_PAGE_SHIFT;
PdeBase[(MM_HARDWARE_VA_START >> MM_PDI_SHIFT) & 0x1FF].Valid = 1;
PdeBase[(MM_HARDWARE_VA_START >> MM_PDI_SHIFT) & 0x1FF].Writable = 1;
@ -52,9 +54,11 @@ XtpMapHardwareMemoryPool(IN PXTBL_PAGE_MAPPING PageMap)
else
{
/* Make PDE valid (PAE disabled) */
((PHARDWARE_LEGACY_PTE)PageMap->PtePointer)[MM_HARDWARE_VA_START >> MM_PDI_LEGACY_SHIFT].Valid = 1;
((PHARDWARE_LEGACY_PTE)PageMap->PtePointer)[MM_HARDWARE_VA_START >> MM_PDI_LEGACY_SHIFT].PageFrameNumber = Address >> MM_PAGE_SHIFT;
((PHARDWARE_LEGACY_PTE)PageMap->PtePointer)[MM_HARDWARE_VA_START >> MM_PDI_LEGACY_SHIFT].Writable = 1;
LegacyPdeBase = (PHARDWARE_LEGACY_PTE)PageMap->PtePointer;
RtlZeroMemory(&LegacyPdeBase[MM_HARDWARE_VA_START >> MM_PDI_LEGACY_SHIFT], sizeof(HARDWARE_LEGACY_PTE));
LegacyPdeBase[MM_HARDWARE_VA_START >> MM_PDI_LEGACY_SHIFT].Valid = 1;
LegacyPdeBase[MM_HARDWARE_VA_START >> MM_PDI_LEGACY_SHIFT].PageFrameNumber = Address >> MM_PAGE_SHIFT;
LegacyPdeBase[MM_HARDWARE_VA_START >> MM_PDI_LEGACY_SHIFT].Writable = 1;
}
/* Return success */