CloverBootloader/MemoryFix/AptioMemoryFix/CustomSlide.h
Sergey Isakov f35acfa5ab restructure sources, preliminary include AptioMemoryFix from OC
Signed-off-by: Sergey Isakov <isakov-sl@bk.ru>
2019-10-04 16:19:40 +03:00

78 lines
1.6 KiB
C

/**
Allows to choose a random KASLR slide offset,
when some offsets cannot be used.
by Download-Fritz & vit9696
**/
#ifndef APTIOFIX_CUSTOM_SLIDE_H
#define APTIOFIX_CUSTOM_SLIDE_H
#include "BootArgs.h"
//
// Base kernel address.
//
#define BASE_KERNEL_ADDR ((UINTN)0x100000)
//
// Slide offset per slide entry
//
#define SLIDE_GRANULARITY ((UINTN)0x200000)
//
// Total possible number of KASLR slide offsets.
//
#define TOTAL_SLIDE_NUM 256
/**
* Ensures that the original csr-active-config is passed to the kernel,
* and removes customised slide value for security reasons.
* @return VOID
*/
VOID
RestoreCustomSlideOverrides (
AMF_BOOT_ARGUMENTS *BA
);
/**
* Patches boot.efi to support random and passed slide values in safe mode.
* @param ImageBase
* @param ImageSize
* @return VOID
*/
VOID
UnlockSlideSupportForSafeMode (
UINT8 *ImageBase,
UINTN ImageSize
);
/**
* Custom gRT->GetVariable override used to return customised values
* for boot-args and csr-active-config variables.
* @return EFI_STATUS
*/
EFI_STATUS
EFIAPI
GetVariableCustomSlide (
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
OUT UINT32 *Attributes OPTIONAL,
IN OUT UINTN *DataSize,
OUT VOID *Data
);
/**
* Checks whether the area overlaps with a possible kernel image area.
* Returns TRUE if the given mem area overlaps, otherwise returns FALSE.
* @return TRUE or FALSE
*/
BOOLEAN
OverlapsWithSlide (
EFI_PHYSICAL_ADDRESS Address,
UINTN Size
);
#endif // APTIOFIX_CUSTOM_SLIDE_H