Elf32Lib.c File Reference

#include "ElfLibInternal.h"

Go to the source code of this file.

Functions
Elf32_Shdr *	GetElf32SectionByIndex (IN UINT8 *ImageBase, IN UINT32 Index)
Elf32_Phdr *	GetElf32SegmentByIndex (IN UINT8 *ImageBase, IN UINT32 Index)
Elf32_Shdr *	GetElf32SectionByRange (IN UINT8 *ImageBase, IN UINT32 Offset, IN UINT32 Size)
EFI_STATUS	ProcessRelocation32 (IN Elf32_Rela *Rela, IN UINT32 RelaSize, IN UINT32 RelaEntrySize, IN UINT32 RelaType, IN INTN Delta, IN BOOLEAN DynamicLinking)
EFI_STATUS	RelocateElf32Dynamic (IN ELF_IMAGE_CONTEXT *ElfCt)
EFI_STATUS	RelocateElf32Sections (IN ELF_IMAGE_CONTEXT *ElfCt)
EFI_STATUS	LoadElf32Image (IN ELF_IMAGE_CONTEXT *ElfCt)

Detailed Description

ELF library

Copyright (c) 2019 - 2021, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file Elf32Lib.c.

Function Documentation

GetElf32SectionByIndex()

Elf32_Shdr * GetElf32SectionByIndex	(	IN UINT8 *	ImageBase,
		IN UINT32	Index
	)

Return the section header specified by Index.

Parameters

ImageBase	The image base.
Index	The section index.

Returns

Pointer to the section header.

Definition at line 20 of file Elf32Lib.c.

GetElf32SectionByRange()

Elf32_Shdr * GetElf32SectionByRange	(	IN UINT8 *	ImageBase,
		IN UINT32	Offset,
		IN UINT32	Size
	)

Return the section header specified by the range.

Parameters

ImageBase	The image base.
Offset	The section offset.
Size	The section size.

Returns

Pointer to the section header.

Definition at line 69 of file Elf32Lib.c.

GetElf32SegmentByIndex()

Elf32_Phdr * GetElf32SegmentByIndex	(	IN UINT8 *	ImageBase,
		IN UINT32	Index
	)

Return the segment header specified by Index.

Parameters

ImageBase	The image base.
Index	The segment index.

Returns

Pointer to the segment header.

Definition at line 44 of file Elf32Lib.c.

LoadElf32Image()

EFI_STATUS LoadElf32Image

(

IN ELF_IMAGE_CONTEXT *

ElfCt

)

Load ELF image which has 32-bit architecture.

Caller should set Context.ImageAddress to a proper value, either pointing to a new allocated memory whose size equal to Context.ImageSize, or pointing to Context.PreferredImageAddress.

Parameters

[in]

ElfCt

ELF image context pointer.

Return values

EFI_SUCCESS	ELF binary is loaded successfully.
Others	Loading ELF binary fails.

Definition at line 430 of file Elf32Lib.c.

ProcessRelocation32()

EFI_STATUS ProcessRelocation32	(	IN Elf32_Rela *	Rela,
		IN UINT32	RelaSize,
		IN UINT32	RelaEntrySize,
		IN UINT32	RelaType,
		IN INTN	Delta,
		IN BOOLEAN	DynamicLinking
	)

Fix up the image based on the relocation entries.

Parameters

Rela	Relocation entries.
RelaSize	Total size of relocation entries.
RelaEntrySize	Relocation entry size.
RelaType	Type of relocation entry.
Delta	The delta between preferred image base and the actual image base.
DynamicLinking	TRUE when fixing up according to dynamic relocation.

Return values

EFI_SUCCESS

The image fix up is processed successfully.

Definition at line 106 of file Elf32Lib.c.

RelocateElf32Dynamic()

EFI_STATUS RelocateElf32Dynamic

(

IN ELF_IMAGE_CONTEXT *

ElfCt

)

Relocate the DYN type image.

Parameters

ElfCt

Point to image context.

Return values

EFI_SUCCESS	The relocation succeeds.
EFI_UNSUPPORTED	The image doesn't contain a dynamic section.

Definition at line 205 of file Elf32Lib.c.

RelocateElf32Sections()

EFI_STATUS RelocateElf32Sections

(

IN ELF_IMAGE_CONTEXT *

ElfCt

)

Relocate all sections in a ELF image.

Parameters

[in]

ElfCt

ELF image context pointer.

Return values

EFI_UNSUPPORTED	Relocation is not supported.
EFI_SUCCESS	ELF image was relocated successfully.

Definition at line 349 of file Elf32Lib.c.