[edk2-devel] [PATCH v4 10/14] MdeModulePkg: Add NULL checks and Return Status to ImagePropertiesRecordLib
Taylor Beebe
t at taylorbeebe.com
Fri Aug 4 19:46:44 UTC 2023
From: Taylor Beebe <taylor.d.beebe at gmail.com>
Update function headers to clarify the contract of each function and
improve readability. Add NULL checks to all functions that take a
pointer as an argument. Add return status to functions that
may need to return early due to invalid input.
Cc: Jian J Wang <jian.j.wang at intel.com>
Cc: Liming Gao <gaoliming at byosoft.com.cn>
Cc: Dandan Bi <dandan.bi at intel.com>
---
MdeModulePkg/Library/ImagePropertiesRecordLib/ImagePropertiesRecordLib.c | 290 ++++++++++++--------
MdeModulePkg/Include/Library/ImagePropertiesRecordLib.h | 137 ++++-----
2 files changed, 246 insertions(+), 181 deletions(-)
diff --git a/MdeModulePkg/Library/ImagePropertiesRecordLib/ImagePropertiesRecordLib.c b/MdeModulePkg/Library/ImagePropertiesRecordLib/ImagePropertiesRecordLib.c
index 379eb0c6cccd..c9378679e7bb 100644
--- a/MdeModulePkg/Library/ImagePropertiesRecordLib/ImagePropertiesRecordLib.c
+++ b/MdeModulePkg/Library/ImagePropertiesRecordLib/ImagePropertiesRecordLib.c
@@ -22,14 +22,13 @@
((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) + (Size)))
/**
- Converts a number of EFI_PAGEs to a size in bytes.
+ Converts a number of pages to a size in bytes.
NOTE: Do not use EFI_PAGES_TO_SIZE because it handles UINTN only.
- @param Pages The number of EFI_PAGES.
+ @param[in] Pages The number of EFI_PAGES.
- @return The number of bytes associated with the number of EFI_PAGEs specified
- by Pages.
+ @retval The number of bytes associated with the input number of pages.
**/
STATIC
UINT64
@@ -45,10 +44,9 @@ EfiPagesToSize (
NOTE: Do not use EFI_SIZE_TO_PAGES because it handles UINTN only.
- @param Size A size in bytes.
+ @param[in] Size A size in bytes.
- @return The number of EFI_PAGESs associated with the number of bytes specified
- by Size.
+ @retval The number of pages associated with the input number of bytes.
**/
STATIC
@@ -61,12 +59,12 @@ EfiSizeToPages (
}
/**
- Sort memory map entries based upon PhysicalStart, from low to high.
+ Sort memory map entries based upon PhysicalStart from low to high.
- @param MemoryMap A pointer to the buffer in which firmware places
- the current memory map.
- @param MemoryMapSize Size, in bytes, of the MemoryMap buffer.
- @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
+ @param[in, out] MemoryMap A pointer to the buffer in which firmware places
+ the current memory map.
+ @param[in] MemoryMapSize Size, in bytes, of the MemoryMap buffer.
+ @param[in] DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
**/
STATIC
VOID
@@ -105,11 +103,12 @@ SortMemoryMap (
/**
Return the first image record, whose [ImageBase, ImageSize] covered by [Buffer, Length].
- @param Buffer Start Address
- @param Length Address length
- @param ImageRecordList Image record list
+ @param[in] Buffer Starting Address
+ @param[in] Length Length to check
+ @param[in] ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries to check against
+ the memory range Buffer -> Buffer + Length
- @return first image record covered by [buffer, length]
+ @retval The first image record covered by [Buffer, Length]
**/
STATIC
IMAGE_PROPERTIES_RECORD *
@@ -144,17 +143,19 @@ GetImageRecordByAddress (
}
/**
- Set the memory map to new entries, according to one old entry,
- based upon PE code section and data section in image record
+ Break up the input OldRecord into multiple new records based on the code
+ and data sections in the input ImageRecord.
- @param ImageRecord An image record whose [ImageBase, ImageSize] covered
- by old memory map entry.
- @param NewRecord A pointer to several new memory map entries.
- The caller gurantee the buffer size be 1 +
- (SplitRecordCount * DescriptorSize) calculated
- below.
- @param OldRecord A pointer to one old memory map entry.
- @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
+ @param[in] ImageRecord An IMAGE_PROPERTIES_RECORD whose ImageBase and
+ ImageSize is covered by by OldRecord.
+ @param[in, out] NewRecord A pointer to several new memory map entries.
+ The caller gurantee the buffer size be 1 +
+ (SplitRecordCount * DescriptorSize) calculated
+ below.
+ @param[in] OldRecord A pointer to one old memory map entry.
+ @param[in] DescriptorSize The size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
+
+ @retval The number of new descriptors created.
**/
STATIC
UINTN
@@ -244,16 +245,16 @@ SetNewRecord (
}
/**
- Return the max number of new splitted entries, according to one old entry,
- based upon PE code section and data section.
+ Return the maximum number of new entries required to describe the code and data sections
+ of all images covered by the input OldRecord.
- @param OldRecord A pointer to one old memory map entry.
- @param ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries used when searching
- for an image record contained by the memory range described in
- the existing EFI memory map descriptor OldRecord
+ @param[in] OldRecord A pointer to one old memory map entry.
+ @param[in] ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries used when searching
+ for an image record contained by the memory range described by
+ OldRecord
- @retval 0 no entry need to be splitted.
- @return the max number of new splitted entries
+ @retval The maximum number of new descriptors required to describe the code and data sections
+ of all images covered by OldRecord.
**/
STATIC
UINTN
@@ -289,22 +290,20 @@ GetMaxSplitRecordCount (
}
/**
- Split the memory map to new entries, according to one old entry,
- based upon PE code section and data section.
+ Split the memory map into new entries based upon the PE code and data sections
+ in ImageRecordList covered by the input OldRecord.
- @param OldRecord A pointer to one old memory map entry.
- @param NewRecord A pointer to several new memory map entries.
- The caller gurantee the buffer size be 1 +
- (SplitRecordCount * DescriptorSize) calculated
- below.
- @param MaxSplitRecordCount The max number of splitted entries
- @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
- @param ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries used when searching
- for an image record contained by the memory range described in
- the existing EFI memory map descriptor OldRecord
+ @param[in] OldRecord A pointer to one old memory map entry.
+ @param[in, out] NewRecord A pointer to several new memory map entries.
+ The caller gurantee the buffer size be
+ (SplitRecordCount * DescriptorSize).
+ @param[in] MaxSplitRecordCount The maximum number of entries post-split.
+ @param[in] DescriptorSize The size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
+ @param[in] ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries used when searching
+ for an image record contained by the memory range described in
+ the existing EFI memory map descriptor OldRecord
- @retval 0 no entry is splitted.
- @return the real number of splitted record.
+ @retval The number of split entries.
**/
STATIC
UINTN
@@ -402,56 +401,47 @@ SplitRecord (
}
/**
- Split the original memory map, and add more entries to describe PE code section and data section.
- This function will set EfiRuntimeServicesData to be EFI_MEMORY_XP.
- This function will merge entries with same attributes finally.
+ Split the original memory map and add more entries to describe PE code
+ and data sections for each image in the input ImageRecordList.
- NOTE: It assumes PE code/data section are page aligned.
- NOTE: It assumes enough entry is prepared for new memory map.
+ NOTE: This function assumes PE code/data section are page aligned.
+ NOTE: This function assumes there are enough entries for the new memory map.
- Split table:
- +---------------+
- | Record X |
- +---------------+
- | Record RtCode |
- +---------------+
- | Record Y |
- +---------------+
- ==>
- +---------------+
- | Record X |
- +---------------+ ----
- | Record RtData | |
- +---------------+ |
- | Record RtCode | |-> PE/COFF1
- +---------------+ |
- | Record RtData | |
- +---------------+ ----
- | Record RtData | |
- +---------------+ |
- | Record RtCode | |-> PE/COFF2
- +---------------+ |
- | Record RtData | |
- +---------------+ ----
- | Record Y |
- +---------------+
+ | | | | | | | |
+ | 4K PAGE | DATA | CODE | DATA | CODE | DATA | 4K PAGE |
+ | | | | | | | |
+ Assume the above memory region is the result of one split memory map descriptor. It's unlikely
+ that a linker will orient an image this way, but the caller must assume the worst case scenario.
+ This image layout example contains code sections oriented in a way that maximizes the number of
+ descriptors which would be required to describe each section. To ensure we have enough space
+ for every descriptor of the broken up memory map, the caller must assume that every image will
+ have the maximum number of code sections oriented in a way which maximizes the number of data
+ sections with unrelated memory regions flanking each image within a single descriptor.
- @param MemoryMapSize A pointer to the size, in bytes, of the
- MemoryMap buffer. On input, this is the size of
- old MemoryMap before split. The actual buffer
- size of MemoryMap is MemoryMapSize +
- (AdditionalRecordCount * DescriptorSize) calculated
- below. On output, it is the size of new MemoryMap
- after split.
- @param MemoryMap A pointer to the buffer in which firmware places
- the current memory map.
- @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
- @param ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries used when searching
- for an image record contained by the memory range described in
- EFI memory map descriptors.
- @param NumberOfAdditionalDescriptors The number of unused descriptors at the end of the input MemoryMap.
+ Given an image record list, the caller should use the following formula when allocating extra descriptors:
+ NumberOfAdditionalDescriptors = (MemoryMapSize / DescriptorSize) +
+ ((2 * <Most Code Segments in a Single Image> + 3) * <Number of Images>)
+
+ @param[in, out] MemoryMapSize IN: The size, in bytes, of the old memory map before the split.
+ OUT: The size, in bytes, of the used descriptors of the split
+ memory map
+ @param[in, out] MemoryMap IN: A pointer to the buffer containing the current memory map.
+ This buffer must have enough space to accomodate the "worst case"
+ scenario where every image in ImageRecordList needs a new descriptor
+ to describe its code and data sections.
+ OUT: A pointer to the updated memory map with separated image section
+ descriptors.
+ @param[in] DescriptorSize The size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
+ @param[in] ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries used when searching
+ for an image record contained by the memory range described in
+ EFI memory map descriptors.
+ @param[in] NumberOfAdditionalDescriptors The number of unused descriptors at the end of the input MemoryMap.
+ The formula in the description should be used to calculate this value.
+
+ @retval EFI_SUCCESS The memory map was successfully split.
+ @retval EFI_INVALID_PARAMETER MemoryMapSize, MemoryMap, or ImageRecordList was NULL.
**/
-VOID
+EFI_STATUS
EFIAPI
SplitTable (
IN OUT UINTN *MemoryMapSize,
@@ -468,6 +458,10 @@ SplitTable (
UINTN RealSplitRecordCount;
UINTN TotalSkippedRecords;
+ if ((MemoryMapSize == NULL) || (MemoryMap == NULL) || (ImageRecordList == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
TotalSkippedRecords = 0;
//
// Let old record point to end of valid MemoryMap buffer.
@@ -518,16 +512,19 @@ SplitTable (
*MemoryMapSize = (IndexNewStarting - IndexNew - TotalSkippedRecords) * DescriptorSize;
- return;
+ return EFI_SUCCESS;
}
/**
- Swap two code sections in image record.
+ Swap two code sections in a single IMAGE_PROPERTIES_RECORD.
- @param FirstImageRecordCodeSection first code section in image record
- @param SecondImageRecordCodeSection second code section in image record
+ @param[in] FirstImageRecordCodeSection The first code section
+ @param[in] SecondImageRecordCodeSection The second code section
+
+ @retval EFI_SUCCESS The code sections were swapped successfully
+ @retval EFI_INVALID_PARAMETER FirstImageRecordCodeSection or SecondImageRecordCodeSection is NULL
**/
-VOID
+EFI_STATUS
EFIAPI
SwapImageRecordCodeSection (
IN IMAGE_PROPERTIES_RECORD_CODE_SECTION *FirstImageRecordCodeSection,
@@ -536,6 +533,10 @@ SwapImageRecordCodeSection (
{
IMAGE_PROPERTIES_RECORD_CODE_SECTION TempImageRecordCodeSection;
+ if ((FirstImageRecordCodeSection == NULL) || (SecondImageRecordCodeSection == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
TempImageRecordCodeSection.CodeSegmentBase = FirstImageRecordCodeSection->CodeSegmentBase;
TempImageRecordCodeSection.CodeSegmentSize = FirstImageRecordCodeSection->CodeSegmentSize;
@@ -544,19 +545,26 @@ SwapImageRecordCodeSection (
SecondImageRecordCodeSection->CodeSegmentBase = TempImageRecordCodeSection.CodeSegmentBase;
SecondImageRecordCodeSection->CodeSegmentSize = TempImageRecordCodeSection.CodeSegmentSize;
+
+ return EFI_SUCCESS;
}
/**
- Sort code section in image record, based upon CodeSegmentBase from low to high.
+ Sort the code sections in the input ImageRecord based upon CodeSegmentBase from low to high.
- @param ImageRecord image record to be sorted
+ @param[in] ImageRecord IMAGE_PROPERTIES_RECORD to be sorted
+
+ @retval EFI_SUCCESS The code sections in the input ImageRecord were sorted successfully
+ @retval EFI_ABORTED An error occurred while sorting the code sections in the input ImageRecord
+ @retval EFI_INVALID_PARAMETER ImageRecord is NULL
**/
-VOID
+EFI_STATUS
EFIAPI
SortImageRecordCodeSection (
IN IMAGE_PROPERTIES_RECORD *ImageRecord
)
{
+ EFI_STATUS Status;
IMAGE_PROPERTIES_RECORD_CODE_SECTION *ImageRecordCodeSection;
IMAGE_PROPERTIES_RECORD_CODE_SECTION *NextImageRecordCodeSection;
LIST_ENTRY *ImageRecordCodeSectionLink;
@@ -564,6 +572,10 @@ SortImageRecordCodeSection (
LIST_ENTRY *ImageRecordCodeSectionEndLink;
LIST_ENTRY *ImageRecordCodeSectionList;
+ if (ImageRecord == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
ImageRecordCodeSectionList = &ImageRecord->CodeSegmentList;
ImageRecordCodeSectionLink = ImageRecordCodeSectionList->ForwardLink;
@@ -584,7 +596,11 @@ SortImageRecordCodeSection (
IMAGE_PROPERTIES_RECORD_CODE_SECTION_SIGNATURE
);
if (ImageRecordCodeSection->CodeSegmentBase > NextImageRecordCodeSection->CodeSegmentBase) {
- SwapImageRecordCodeSection (ImageRecordCodeSection, NextImageRecordCodeSection);
+ Status = SwapImageRecordCodeSection (ImageRecordCodeSection, NextImageRecordCodeSection);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return EFI_ABORTED;
+ }
}
NextImageRecordCodeSectionLink = NextImageRecordCodeSectionLink->ForwardLink;
@@ -593,15 +609,20 @@ SortImageRecordCodeSection (
ImageRecordCodeSectionLink = ImageRecordCodeSectionLink->ForwardLink;
NextImageRecordCodeSectionLink = ImageRecordCodeSectionLink->ForwardLink;
}
+
+ return EFI_SUCCESS;
}
/**
- Check if code section in image record is valid.
+ Check if the code sections in the input ImageRecord are valid.
+ The code sections are valid if they don't overlap, are contained
+ within the the ImageRecord's ImageBase and ImageSize, and are
+ contained within the MAX_ADDRESS.
- @param ImageRecord image record to be checked
+ @param[in] ImageRecord IMAGE_PROPERTIES_RECORD to be checked
- @retval TRUE image record is valid
- @retval FALSE image record is invalid
+ @retval TRUE The code sections in the input ImageRecord are valid
+ @retval FALSE The code sections in the input ImageRecord are invalid
**/
BOOLEAN
EFIAPI
@@ -615,6 +636,10 @@ IsImageRecordCodeSectionValid (
LIST_ENTRY *ImageRecordCodeSectionEndLink;
LIST_ENTRY *ImageRecordCodeSectionList;
+ if (ImageRecord == NULL) {
+ return FALSE;
+ }
+
DEBUG ((DEBUG_VERBOSE, "ImageCode SegmentCount - 0x%x\n", ImageRecord->CodeSegmentCount));
ImageRecordCodeSectionList = &ImageRecord->CodeSegmentList;
@@ -661,10 +686,13 @@ IsImageRecordCodeSectionValid (
/**
Swap two image records.
- @param FirstImageRecord first image record.
- @param SecondImageRecord second image record.
+ @param[in] FirstImageRecord The first image record.
+ @param[in] SecondImageRecord The second image record.
+
+ @retval EFI_SUCCESS The image records were swapped successfully
+ @retval EFI_INVALID_PARAMETER FirstImageRecord or SecondImageRecord is NULL
**/
-VOID
+EFI_STATUS
EFIAPI
SwapImageRecord (
IN IMAGE_PROPERTIES_RECORD *FirstImageRecord,
@@ -673,6 +701,10 @@ SwapImageRecord (
{
IMAGE_PROPERTIES_RECORD TempImageRecord;
+ if ((FirstImageRecord == NULL) || (SecondImageRecord == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
TempImageRecord.ImageBase = FirstImageRecord->ImageBase;
TempImageRecord.ImageSize = FirstImageRecord->ImageSize;
TempImageRecord.CodeSegmentCount = FirstImageRecord->CodeSegmentCount;
@@ -686,14 +718,19 @@ SwapImageRecord (
SecondImageRecord->CodeSegmentCount = TempImageRecord.CodeSegmentCount;
SwapListEntries (&FirstImageRecord->CodeSegmentList, &SecondImageRecord->CodeSegmentList);
+ return EFI_SUCCESS;
}
/**
- Sort image record based upon the ImageBase from low to high.
+ Sort the input ImageRecordList based upon the ImageBase from low to high.
- @param ImageRecordList Image record list to be sorted
+ @param[in] ImageRecordList Image record list to be sorted
+
+ @retval EFI_SUCCESS The image record list was sorted successfully
+ @retval EFI_ABORTED An error occurred while sorting the image record list
+ @retval EFI_INVALID_PARAMETER ImageRecordList is NULL
**/
-VOID
+EFI_STATUS
EFIAPI
SortImageRecord (
IN LIST_ENTRY *ImageRecordList
@@ -704,6 +741,11 @@ SortImageRecord (
LIST_ENTRY *ImageRecordLink;
LIST_ENTRY *NextImageRecordLink;
LIST_ENTRY *ImageRecordEndLink;
+ EFI_STATUS Status;
+
+ if (ImageRecordList == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
ImageRecordLink = ImageRecordList->ForwardLink;
NextImageRecordLink = ImageRecordLink->ForwardLink;
@@ -724,7 +766,11 @@ SortImageRecord (
);
if (ImageRecord->ImageBase > NextImageRecord->ImageBase) {
- SwapImageRecord (ImageRecord, NextImageRecord);
+ Status = SwapImageRecord (ImageRecord, NextImageRecord);
+ if (EFI_ERROR (Status)) {
+ ASSERT_EFI_ERROR (Status);
+ return EFI_ABORTED;
+ }
}
NextImageRecordLink = NextImageRecordLink->ForwardLink;
@@ -733,16 +779,20 @@ SortImageRecord (
ImageRecordLink = ImageRecordLink->ForwardLink;
NextImageRecordLink = ImageRecordLink->ForwardLink;
}
+
+ return EFI_SUCCESS;
}
/**
Find image record according to image base and size.
- @param ImageBase Base of PE image
- @param ImageSize Size of PE image
- @param ImageRecordList Image record list to be searched
+ @param[in] ImageBase Base of PE image
+ @param[in] ImageSize Size of PE image
+ @param[in] ImageRecordList Image record list to be searched
- @return image record
+ @retval NULL No IMAGE_PROPERTIES_RECORD matches ImageBase
+ and ImageSize in the input ImageRecordList
+ @retval Other The found IMAGE_PROPERTIES_RECORD
**/
IMAGE_PROPERTIES_RECORD *
EFIAPI
@@ -755,6 +805,10 @@ FindImageRecord (
IMAGE_PROPERTIES_RECORD *ImageRecord;
LIST_ENTRY *ImageRecordLink;
+ if (ImageRecordList == NULL) {
+ return NULL;
+ }
+
for (ImageRecordLink = ImageRecordList->ForwardLink;
ImageRecordLink != ImageRecordList;
ImageRecordLink = ImageRecordLink->ForwardLink)
diff --git a/MdeModulePkg/Include/Library/ImagePropertiesRecordLib.h b/MdeModulePkg/Include/Library/ImagePropertiesRecordLib.h
index 9139c7b6c05d..b6365662646a 100644
--- a/MdeModulePkg/Include/Library/ImagePropertiesRecordLib.h
+++ b/MdeModulePkg/Include/Library/ImagePropertiesRecordLib.h
@@ -32,56 +32,47 @@ typedef struct {
} IMAGE_PROPERTIES_RECORD;
/**
- Split the original memory map, and add more entries to describe PE code section and data section.
- This function will set EfiRuntimeServicesData to be EFI_MEMORY_XP.
- This function will merge entries with same attributes finally.
+ Split the original memory map and add more entries to describe PE code
+ and data sections for each image in the input ImageRecordList.
- NOTE: It assumes PE code/data section are page aligned.
- NOTE: It assumes enough entry is prepared for new memory map.
+ NOTE: This function assumes PE code/data section are page aligned.
+ NOTE: This function assumes there are enough entries for the new memory map.
- Split table:
- +---------------+
- | Record X |
- +---------------+
- | Record RtCode |
- +---------------+
- | Record Y |
- +---------------+
- ==>
- +---------------+
- | Record X |
- +---------------+ ----
- | Record RtData | |
- +---------------+ |
- | Record RtCode | |-> PE/COFF1
- +---------------+ |
- | Record RtData | |
- +---------------+ ----
- | Record RtData | |
- +---------------+ |
- | Record RtCode | |-> PE/COFF2
- +---------------+ |
- | Record RtData | |
- +---------------+ ----
- | Record Y |
- +---------------+
+ | | | | | | | |
+ | 4K PAGE | DATA | CODE | DATA | CODE | DATA | 4K PAGE |
+ | | | | | | | |
+ Assume the above memory region is the result of one split memory map descriptor. It's unlikely
+ that a linker will orient an image this way, but the caller must assume the worst case scenario.
+ This image layout example contains code sections oriented in a way that maximizes the number of
+ descriptors which would be required to describe each section. To ensure we have enough space
+ for every descriptor of the broken up memory map, the caller must assume that every image will
+ have the maximum number of code sections oriented in a way which maximizes the number of data
+ sections with unrelated memory regions flanking each image within a single descriptor.
- @param MemoryMapSize A pointer to the size, in bytes, of the
- MemoryMap buffer. On input, this is the size of
- old MemoryMap before split. The actual buffer
- size of MemoryMap is MemoryMapSize +
- (AdditionalRecordCount * DescriptorSize) calculated
- below. On output, it is the size of new MemoryMap
- after split.
- @param MemoryMap A pointer to the buffer in which firmware places
- the current memory map.
- @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
- @param ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries used when searching
- for an image record contained by the memory range described in
- EFI memory map descriptors.
- @param NumberOfAdditionalDescriptors The number of unused descriptors at the end of the input MemoryMap.
+ Given an image record list, the caller should use the following formula when allocating extra descriptors:
+ NumberOfAdditionalDescriptors = (MemoryMapSize / DescriptorSize) +
+ ((2 * <Most Code Segments in a Single Image> + 3) * <Number of Images>)
+
+ @param[in, out] MemoryMapSize IN: The size, in bytes, of the old memory map before the split.
+ OUT: The size, in bytes, of the used descriptors of the split
+ memory map
+ @param[in, out] MemoryMap IN: A pointer to the buffer containing the current memory map.
+ This buffer must have enough space to accomodate the "worst case"
+ scenario where every image in ImageRecordList needs a new descriptor
+ to describe its code and data sections.
+ OUT: A pointer to the updated memory map with separated image section
+ descriptors.
+ @param[in] DescriptorSize The size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
+ @param[in] ImageRecordList A list of IMAGE_PROPERTIES_RECORD entries used when searching
+ for an image record contained by the memory range described in
+ EFI memory map descriptors.
+ @param[in] NumberOfAdditionalDescriptors The number of unused descriptors at the end of the input MemoryMap.
+ The formula in the description should be used to calculate this value.
+
+ @retval EFI_SUCCESS The memory map was successfully split.
+ @retval EFI_INVALID_PARAMETER MemoryMapSize, MemoryMap, or ImageRecordList was NULL.
**/
-VOID
+EFI_STATUS
EFIAPI
SplitTable (
IN OUT UINTN *MemoryMapSize,
@@ -92,23 +83,30 @@ SplitTable (
);
/**
- Sort code section in image record, based upon CodeSegmentBase from low to high.
+ Sort the code sections in the input ImageRecord based upon CodeSegmentBase from low to high.
- @param ImageRecord image record to be sorted
+ @param[in] ImageRecord IMAGE_PROPERTIES_RECORD to be sorted
+
+ @retval EFI_SUCCESS The code sections in the input ImageRecord were sorted successfully
+ @retval EFI_ABORTED An error occurred while sorting the code sections in the input ImageRecord
+ @retval EFI_INVALID_PARAMETER ImageRecord is NULL
**/
-VOID
+EFI_STATUS
EFIAPI
SortImageRecordCodeSection (
IN IMAGE_PROPERTIES_RECORD *ImageRecord
);
/**
- Check if code section in image record is valid.
+ Check if the code sections in the input ImageRecord are valid.
+ The code sections are valid if they don't overlap, are contained
+ within the the ImageRecord's ImageBase and ImageSize, and are
+ contained within the MAX_ADDRESS.
- @param ImageRecord image record to be checked
+ @param[in] ImageRecord IMAGE_PROPERTIES_RECORD to be checked
- @retval TRUE image record is valid
- @retval FALSE image record is invalid
+ @retval TRUE The code sections in the input ImageRecord are valid
+ @retval FALSE The code sections in the input ImageRecord are invalid
**/
BOOLEAN
EFIAPI
@@ -117,11 +115,15 @@ IsImageRecordCodeSectionValid (
);
/**
- Sort image record based upon the ImageBase from low to high.
+ Sort the input ImageRecordList based upon the ImageBase from low to high.
- @param ImageRecordList Image record list to be sorted
+ @param[in] ImageRecordList Image record list to be sorted
+
+ @retval EFI_SUCCESS The image record list was sorted successfully
+ @retval EFI_ABORTED An error occurred while sorting the image record list
+ @retval EFI_INVALID_PARAMETER ImageRecordList is NULL
**/
-VOID
+EFI_STATUS
EFIAPI
SortImageRecord (
IN LIST_ENTRY *ImageRecordList
@@ -132,8 +134,11 @@ SortImageRecord (
@param[in] FirstImageRecord The first image record.
@param[in] SecondImageRecord The second image record.
+
+ @retval EFI_SUCCESS The image records were swapped successfully
+ @retval EFI_INVALID_PARAMETER FirstImageRecord or SecondImageRecord is NULL
**/
-VOID
+EFI_STATUS
EFIAPI
SwapImageRecord (
IN IMAGE_PROPERTIES_RECORD *FirstImageRecord,
@@ -145,8 +150,11 @@ SwapImageRecord (
@param[in] FirstImageRecordCodeSection The first code section
@param[in] SecondImageRecordCodeSection The second code section
+
+ @retval EFI_SUCCESS The code sections were swapped successfully
+ @retval EFI_INVALID_PARAMETER FirstImageRecordCodeSection or SecondImageRecordCodeSection is NULL
**/
-VOID
+EFI_STATUS
EFIAPI
SwapImageRecordCodeSection (
IN IMAGE_PROPERTIES_RECORD_CODE_SECTION *FirstImageRecordCodeSection,
@@ -154,13 +162,16 @@ SwapImageRecordCodeSection (
);
/**
- Find image record according to image base and size.
+ Find image properties record according to image base and size in the
+ input ImageRecordList.
- @param ImageBase Base of PE image
- @param ImageSize Size of PE image
- @param ImageRecordList Image record list to be searched
+ @param[in] ImageBase Base of PE image
+ @param[in] ImageSize Size of PE image
+ @param[in] ImageRecordList Image record list to be searched
- @return image record
+ @retval NULL No IMAGE_PROPERTIES_RECORD matches ImageBase
+ and ImageSize in the input ImageRecordList
+ @retval Other The found IMAGE_PROPERTIES_RECORD
**/
IMAGE_PROPERTIES_RECORD *
EFIAPI
--
2.41.0.windows.3
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