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BaseUeImageLib: Added support for Runtime chaining relocs.

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This commit is contained in:
Mikhail Krichanov 2023-09-12 14:08:49 +03:00 committed by MikhailKrichanov
parent c3ffeb1985
commit 33ef407f5e
2 changed files with 128 additions and 36 deletions
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3
BaseTools/ImageTool/UeEmit.c
View File

@ -822,8 +822,7 @@ ToolImageEmitUeFile (
LastSegmentIndex = (uint8_t)(Image->SegmentInfo.NumSegments - 1U);
Chaining = Image->HeaderInfo.BaseAddress == 0 &&
!Image->HeaderInfo.FixedAddress &&
Image->HeaderInfo.Subsystem != EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER;
!Image->HeaderInfo.FixedAddress;
UeHdr.Magic = UE_HEADER_MAGIC;

161
MdePkg/Library/BaseUeImageLib/UeImageLib.c
View File

@ -19,13 +19,14 @@
#include <Library/PeCoffLib2.h>
#include <Library/UefiImageLib.h>
#include <Library/UeImageLib.h>
#include <Library/PcdLib.h>
struct UE_LOADER_RUNTIME_CONTEXT_ {
UINT8 Machine;
UINT8 Reserved[7];
UINT32 FixupSize;
UINT64 *FixupData;
UINT32 UnchainedRelocsSize;
UINT8 *UnchainedRelocs;
UINT32 RelocTableSize;
UINT8 RelocTable[];
};
@ -461,8 +462,7 @@ InternalApplyRelocation (
IN UINT16 RelocType,
IN UINT32 *RelocTarget,
IN UINT64 Adjust,
OUT UINT64 *FixupData OPTIONAL,
IN BOOLEAN IsRuntime
IN UINT64 *FixupData
)
{
BOOLEAN Overflow;
@ -474,6 +474,8 @@ InternalApplyRelocation (
UINT8 FixupSize;
UE_RELOC_FIXUP_VALUE FixupValue;
ASSERT (FixupData != NULL);
FixupTarget = *RelocTarget;
//
// Verify the relocation fixup target address is in bounds of the image buffer.
@ -505,7 +507,7 @@ InternalApplyRelocation (
//
// If the Image relocation target value mismatches, skip or abort.
//
if (IsRuntime && (FixupValue.Value32 != (UINT32)*FixupData)) {
if (FixupValue.Value32 != (UINT32)*FixupData) {
if (PcdGetBool (PcdImageLoaderRtRelocAllowTargetMismatch)) {
return RETURN_SUCCESS;
}
@ -515,10 +517,6 @@ InternalApplyRelocation (
FixupValue.Value32 += (UINT32) Adjust;
WriteUnaligned32 (Fixup, FixupValue.Value32);
if (!IsRuntime) {
*FixupData = FixupValue.Value32;
}
} else {
ASSERT (RelocType == UeReloc64);
@ -538,7 +536,7 @@ InternalApplyRelocation (
//
// If the Image relocation target value mismatches, skip or abort.
//
if (IsRuntime && (FixupValue.Value64 != *FixupData)) {
if (FixupValue.Value64 != *FixupData) {
if (PcdGetBool (PcdImageLoaderRtRelocAllowTargetMismatch)) {
return RETURN_SUCCESS;
}
@ -548,10 +546,6 @@ InternalApplyRelocation (
FixupValue.Value64 += Adjust;
WriteUnaligned64 (Fixup, FixupValue.Value64);
if (!IsRuntime) {
*FixupData = FixupValue.Value64;
}
}
} else {
#if 0
@ -606,6 +600,67 @@ InternalApplyRelocation (
return RETURN_SUCCESS;
}
STATIC
RETURN_STATUS
UnchainReloc (
IN OUT UE_LOADER_RUNTIME_CONTEXT *RuntimeContext OPTIONAL,
IN CONST UINT8 *MetaSource OPTIONAL,
IN UINT32 MetaSize,
IN BOOLEAN IsRuntime,
IN UINT16 RelocOffset,
IN UINT64 *FixupData
)
{
UINT32 OldSize;
UINT16 FixupHdr;
UINT32 FixupIndex;
if ((RuntimeContext != NULL) && !IsRuntime) {
if (MetaSource == NULL) {
FixupIndex = RuntimeContext->UnchainedRelocsSize - sizeof (UINT16);
FixupHdr = *(UINT16 *)&RuntimeContext->UnchainedRelocs[FixupIndex];
FixupHdr = (RelocOffset << 4U) | UE_RELOC_FIXUP_TYPE(FixupHdr);
*(UINT16 *)&RuntimeContext->UnchainedRelocs[FixupIndex] = FixupHdr;
return RETURN_SUCCESS;
}
OldSize = RuntimeContext->UnchainedRelocsSize;
RuntimeContext->UnchainedRelocs = ReallocateRuntimePool (
OldSize,
OldSize + MetaSize,
RuntimeContext->UnchainedRelocs
);
if (RuntimeContext->UnchainedRelocs == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
CopyMem (RuntimeContext->UnchainedRelocs + OldSize, MetaSource, MetaSize);
RuntimeContext->UnchainedRelocsSize += MetaSize;
if (FixupData != NULL) {
OldSize = RuntimeContext->FixupSize;
RuntimeContext->FixupData = ReallocateRuntimePool (
OldSize,
OldSize + sizeof (*FixupData),
RuntimeContext->FixupData
);
if (RuntimeContext->FixupData == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
CopyMem ((UINT8 *)RuntimeContext->FixupData + OldSize, FixupData, sizeof (*FixupData));
RuntimeContext->FixupSize += sizeof (*FixupData);
}
}
return RETURN_SUCCESS;
}
STATIC
RETURN_STATUS
InternalProcessRelocChain (
@ -614,9 +669,11 @@ InternalProcessRelocChain (
IN UINT8 Machine,
IN UINT16 FirstRelocType,
IN UINT32 *ChainStart,
IN UINT64 Adjust
IN UINT64 Adjust,
IN OUT UE_LOADER_RUNTIME_CONTEXT *RuntimeContext OPTIONAL
)
{
RETURN_STATUS Status;
UINT16 RelocType;
UINT16 RelocOffset;
UINT32 RelocTarget;
@ -628,6 +685,8 @@ InternalProcessRelocChain (
UE_RELOC_FIXUP_VALUE FixupInfo;
UINT8 FixupSize;
UE_RELOC_FIXUP_VALUE FixupValue;
UINT16 FixupHdr;
UINT64 FixupData;
RelocType = FirstRelocType;
RelocTarget = *ChainStart;
@ -658,6 +717,8 @@ InternalProcessRelocChain (
FixupValue.Value64 = UE_CHAINED_RELOC_FIXUP_VALUE (FixupInfo.Value64);
FixupValue.Value64 += Adjust;
WriteUnaligned64 ((VOID *)Fixup, FixupValue.Value64);
FixupData = FixupValue.Value64;
} else if (RelocType == UeReloc32) {
FixupSize = sizeof (UINT32);
//
@ -675,6 +736,8 @@ InternalProcessRelocChain (
FixupValue.Value32 = UE_CHAINED_RELOC_FIXUP_VALUE_32 (FixupInfo.Value32);
FixupValue.Value32 += (UINT32) Adjust;
WriteUnaligned32 ((VOID *)Fixup, FixupValue.Value32);
FixupData = FixupValue.Value32;
//
// Imitate the common header of UE chained relocation fixups,
// as for 32-bit files all relocs have the same type.
@ -699,6 +762,20 @@ InternalProcessRelocChain (
RelocTarget += FixupSize;
RelocOffset = UE_CHAINED_RELOC_FIXUP_NEXT_OFFSET (FixupInfo.Value32);
FixupHdr = (RelocOffset << 4) | RelocType;
Status = UnchainReloc (
RuntimeContext,
(CONST UINT8 *)&FixupHdr,
sizeof (FixupHdr),
FALSE,
0,
&FixupData
);
if (RETURN_ERROR (Status)) {
return Status;
}
if (RelocOffset == UE_CHAINED_RELOC_FIXUP_OFFSET_END) {
*ChainStart = RelocTarget;
return RETURN_SUCCESS;
@ -727,7 +804,7 @@ InternaRelocateImage (
IN UINT32 RelocTableSize,
IN BOOLEAN Chaining,
IN UINT64 BaseAddress,
OUT UINT64 *FixupData OPTIONAL,
OUT UE_LOADER_RUNTIME_CONTEXT *RuntimeContext OPTIONAL,
IN BOOLEAN IsRuntime
)
{
@ -748,6 +825,7 @@ InternaRelocateImage (
UINT32 RelocTarget;
UINT32 OldTableOffset;
UINT64 *FixupData;
ASSERT (Image != NULL);
ASSERT (RelocTable != NULL || RelocTableSize == 0);
@ -773,6 +851,7 @@ InternaRelocateImage (
}
RelocTarget = 0;
FixupData = RuntimeContext != NULL ? RuntimeContext->FixupData : NULL;
STATIC_ASSERT (
MIN_SIZE_OF_UE_FIXUP_ROOT <= UE_LOAD_TABLE_ALIGNMENT,
@ -799,6 +878,18 @@ InternaRelocateImage (
DEBUG_RAISE ();
return RETURN_VOLUME_CORRUPTED;
}
Status = UnchainReloc (
RuntimeContext,
(CONST UINT8 *)RelocRoot,
sizeof (*RelocRoot),
IsRuntime,
0,
NULL
);
if (RETURN_ERROR (Status)) {
return Status;
}
//
// Process all relocation fixups of the current root.
//
@ -813,14 +904,15 @@ InternaRelocateImage (
//
RelocType = UE_RELOC_FIXUP_TYPE (FixupInfo);
if (Chaining) {
if (!IsRuntime) {
Status = InternalProcessRelocChain (
Image,
ImageSize,
Machine,
RelocType,
&RelocTarget,
Adjust
Adjust,
RuntimeContext
);
} else {
Status = InternalApplyRelocation (
@ -830,8 +922,7 @@ InternaRelocateImage (
RelocType,
&RelocTarget,
Adjust,
FixupData,
IsRuntime
FixupData
);
++FixupData;
@ -842,6 +933,19 @@ InternaRelocateImage (
}
RelocOffset = UE_RELOC_FIXUP_OFFSET (FixupInfo);
Status = UnchainReloc (
RuntimeContext,
NULL,
0,
IsRuntime,
RelocOffset,
NULL
);
if (RETURN_ERROR (Status)) {
return Status;
}
if (RelocOffset == UE_HEAD_FIXUP_OFFSET_END) {
break;
}
@ -901,11 +1005,6 @@ UeRelocateImage (
Chaining = (UeHdr->ImageInfo & UE_HEADER_IMAGE_INFO_CHAINED_FIXUPS) != 0;
if (RuntimeContext != NULL) {
if (Chaining) {
DEBUG_RAISE ();
return RETURN_VOLUME_CORRUPTED;
}
RuntimeContext->Machine = Context->Machine;
RuntimeContext->RelocTableSize = Context->RelocTableSize;
@ -915,12 +1014,6 @@ UeRelocateImage (
Context->FileBuffer + Context->LoadTablesFileOffset,
Context->RelocTableSize
);
RuntimeContext->FixupSize = Context->RelocTableSize / sizeof (UINT16) * sizeof (UINT64);
RuntimeContext->FixupData = AllocateRuntimeZeroPool (RuntimeContext->FixupSize);
if (RuntimeContext->FixupData == NULL) {
ASSERT (FALSE);
}
}
return InternaRelocateImage (
@ -932,7 +1025,7 @@ UeRelocateImage (
Context->RelocTableSize,
Chaining,
BaseAddress,
RuntimeContext != NULL ? RuntimeContext->FixupData : NULL,
RuntimeContext,
FALSE
);
}
@ -953,11 +1046,11 @@ UeRelocateImageForRuntime (
ImageSize,
RuntimeContext->Machine,
(UINTN)Image,
RuntimeContext->RelocTable,
RuntimeContext->RelocTableSize,
RuntimeContext->UnchainedRelocs,
RuntimeContext->UnchainedRelocsSize,
FALSE,
BaseAddress,
RuntimeContext->FixupData,
(UE_LOADER_RUNTIME_CONTEXT *)RuntimeContext,
TRUE
);
}