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StandaloneMmPkg/StandaloneMmCoreEntryPoint: relocate StMM core on the fly

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Apply PE/COFF fixups when starting up the standalone MM core, so that
it can execute at any address regardless of the link time address.

Note that this requires the PE/COFF image to be emitted with its
relocation section preserved. Special care is taken to ensure that
TE images are dealt with correctly as well.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Acked-by: Jiewen Yao <Jiewen.yao@intel.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Tested-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Ard Biesheuvel
2020-06-09 10:34:27 +02:00
committed by mergify[bot]
parent cdc686223a
commit 493f2c6931
3 changed files with 34 additions and 3 deletions
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4
StandaloneMmPkg/Include/Library/AArch64/StandaloneMmCoreEntryPoint.h
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@@ -71,6 +71,7 @@ typedef RETURN_STATUS (*REGION_PERMISSION_UPDATE_FUNC) (
and make further progress in the boot process.
@param ImageContext Pointer to PE/COFF image context
@param ImageBase Base of image in memory
@param SectionHeaderOffset Offset of PE/COFF image section header
@param NumberOfSections Number of Sections
@param TextUpdater Function to change code permissions
@@ -82,6 +83,7 @@ EFI_STATUS
EFIAPI
UpdateMmFoundationPeCoffPermissions (
IN CONST PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext,
IN EFI_PHYSICAL_ADDRESS ImageBase,
IN UINT32 SectionHeaderOffset,
IN CONST UINT16 NumberOfSections,
IN REGION_PERMISSION_UPDATE_FUNC TextUpdater,
@@ -98,6 +100,7 @@ UpdateMmFoundationPeCoffPermissions (
@param TeData Pointer to PE/COFF image data
@param ImageContext Pointer to PE/COFF image context
@param ImageBase Pointer to ImageBase variable
@param SectionHeaderOffset Offset of PE/COFF image section header
@param NumberOfSections Number of Sections
@@ -107,6 +110,7 @@ EFIAPI
GetStandaloneMmCorePeCoffSections (
IN VOID *TeData,
IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext,
OUT EFI_PHYSICAL_ADDRESS *ImageBase,
IN OUT UINT32 *SectionHeaderOffset,
IN OUT UINT16 *NumberOfSections
);