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UefiPayloadPkg: Add PayloadLoaderPeim which can load ELF payload 

Per universal payload spec, the payload is in ELF format.
The patch adds a payload loader that supports to load ELF image.

The location of extra data sections whose names start with "upld."
is stored in UNIVERSAL_PAYLOAD_EXTRA_DATA HOB.

Signed-off-by: Maurice Ma <maurice.ma@intel.com>
Signed-off-by: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
This commit is contained in:
Ray Ni 2021-05-01 20:24:55 +08:00 committed by mergify[bot]
parent c511426abe
commit fe471d4a57
10 changed files with 3350 additions and 0 deletions
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122
UefiPayloadPkg/PayloadLoaderPeim/ElfLib.h Normal file
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/** @file
ELF library
Copyright (c) 2018 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef ELF_LIB_H_
#define ELF_LIB_H_
#include <PiPei.h>
#define ELF_CLASS32 1
#define ELF_CLASS64 2
#define ELF_PT_LOAD 1
typedef struct {
RETURN_STATUS ParseStatus; ///< Return the status after ParseElfImage().
UINT8 *FileBase; ///< The source location in memory.
UINTN FileSize; ///< The size including sections that don't require loading.
UINT8 *PreferredImageAddress; ///< The preferred image to be loaded. No relocation is needed if loaded to this address.
BOOLEAN ReloadRequired; ///< The image needs a new memory location for running.
UINT8 *ImageAddress; ///< The destination memory address set by caller.
UINTN ImageSize; ///< The memory size for loading and execution.
UINT32 EiClass;
UINT32 ShNum;
UINT32 PhNum;
UINTN ShStrOff;
UINTN ShStrLen;
UINTN EntryPoint; ///< Return the actual entry point after LoadElfImage().
} ELF_IMAGE_CONTEXT;
typedef struct {
UINT32 PtType;
UINTN Offset;
UINTN Length;
UINTN MemLen;
UINTN MemAddr;
UINTN Alignment;
} SEGMENT_INFO;
/**
Parse the ELF image info.
@param[in] ImageBase Memory address of an image.
@param[out] ElfCt The EFL image context pointer.
@retval EFI_INVALID_PARAMETER Input parameters are not valid.
@retval EFI_UNSUPPORTED Unsupported binary type.
@retval EFI_LOAD_ERROR ELF binary loading error.
@retval EFI_SUCCESS ELF binary is loaded successfully.
**/
EFI_STATUS
EFIAPI
ParseElfImage (
IN VOID *ImageBase,
OUT ELF_IMAGE_CONTEXT *ElfCt
);
/**
Load the ELF segments to specified address in ELF header.
This function loads ELF image segments into memory address specified
in ELF program header.
@param[in] ElfCt ELF image context pointer.
@retval EFI_INVALID_PARAMETER Input parameters are not valid.
@retval EFI_UNSUPPORTED Unsupported binary type.
@retval EFI_LOAD_ERROR ELF binary loading error.
@retval EFI_SUCCESS ELF binary is loaded successfully.
**/
EFI_STATUS
EFIAPI
LoadElfImage (
IN ELF_IMAGE_CONTEXT *ElfCt
);
/**
Get a ELF section name from its index.
@param[in] ElfCt ELF image context pointer.
@param[in] SectionIndex ELF section index.
@param[out] SectionName The pointer to the section name.
@retval EFI_INVALID_PARAMETER ElfCt or SecName is NULL.
@retval EFI_NOT_FOUND Could not find the section.
@retval EFI_SUCCESS Section name was filled successfully.
**/
EFI_STATUS
EFIAPI
GetElfSectionName (
IN ELF_IMAGE_CONTEXT *ElfCt,
IN UINT32 SectionIndex,
OUT CHAR8 **SectionName
);
/**
Get the offset and size of x-th ELF section.
@param[in] ElfCt ELF image context pointer.
@param[in] Index ELF section index.
@param[out] Offset Return the offset of the specific section.
@param[out] Size Return the size of the specific section.
@retval EFI_INVALID_PARAMETER ImageBase, Offset or Size is NULL.
@retval EFI_INVALID_PARAMETER EiClass doesn't equal to ELFCLASS32 or ELFCLASS64.
@retval EFI_NOT_FOUND Could not find the section.
@retval EFI_SUCCESS Offset and Size are returned.
**/
EFI_STATUS
EFIAPI
GetElfSectionPos (
IN ELF_IMAGE_CONTEXT *ElfCt,
IN UINT32 Index,
OUT UINTN *Offset,
OUT UINTN *Size
);
#endif /* ELF_LIB_H_ */

252
UefiPayloadPkg/PayloadLoaderPeim/ElfLib/Elf32.h Normal file
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/** @file
Ported ELF include files from FreeBSD
Copyright (c) 2009 - 2010, Apple Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
/*-
* Copyright (c) 1996-1998 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/sys/elf32.h,v 1.8.14.2 2007/12/03 21:30:36 marius Exp $
*/
#ifndef _SYS_ELF32_H_
#define _SYS_ELF32_H_ 1
/*
* ELF definitions common to all 32-bit architectures.
*/
typedef UINT32 Elf32_Addr;
typedef UINT16 Elf32_Half;
typedef UINT32 Elf32_Off;
typedef INT32 Elf32_Sword;
typedef UINT32 Elf32_Word;
typedef UINT64 Elf32_Lword;
typedef Elf32_Word Elf32_Hashelt;
/* Non-standard class-dependent datatype used for abstraction. */
typedef Elf32_Word Elf32_Size;
typedef Elf32_Sword Elf32_Ssize;
/*
* ELF header.
*/
typedef struct {
unsigned char e_ident[EI_NIDENT]; /* File identification. */
Elf32_Half e_type; /* File type. */
Elf32_Half e_machine; /* Machine architecture. */
Elf32_Word e_version; /* ELF format version. */
Elf32_Addr e_entry; /* Entry point. */
Elf32_Off e_phoff; /* Program header file offset. */
Elf32_Off e_shoff; /* Section header file offset. */
Elf32_Word e_flags; /* Architecture-specific flags. */
Elf32_Half e_ehsize; /* Size of ELF header in bytes. */
Elf32_Half e_phentsize; /* Size of program header entry. */
Elf32_Half e_phnum; /* Number of program header entries. */
Elf32_Half e_shentsize; /* Size of section header entry. */
Elf32_Half e_shnum; /* Number of section header entries. */
Elf32_Half e_shstrndx; /* Section name strings section. */
} Elf32_Ehdr;
/*
* Section header.
*/
typedef struct {
Elf32_Word sh_name; /* Section name (index into the
section header string table). */
Elf32_Word sh_type; /* Section type. */
Elf32_Word sh_flags; /* Section flags. */
Elf32_Addr sh_addr; /* Address in memory image. */
Elf32_Off sh_offset; /* Offset in file. */
Elf32_Word sh_size; /* Size in bytes. */
Elf32_Word sh_link; /* Index of a related section. */
Elf32_Word sh_info; /* Depends on section type. */
Elf32_Word sh_addralign; /* Alignment in bytes. */
Elf32_Word sh_entsize; /* Size of each entry in section. */
} Elf32_Shdr;
/*
* Program header.
*/
typedef struct {
Elf32_Word p_type; /* Entry type. */
Elf32_Off p_offset; /* File offset of contents. */
Elf32_Addr p_vaddr; /* Virtual address in memory image. */
Elf32_Addr p_paddr; /* Physical address (not used). */
Elf32_Word p_filesz; /* Size of contents in file. */
Elf32_Word p_memsz; /* Size of contents in memory. */
Elf32_Word p_flags; /* Access permission flags. */
Elf32_Word p_align; /* Alignment in memory and file. */
} Elf32_Phdr;
/*
* Dynamic structure. The ".dynamic" section contains an array of them.
*/
typedef struct {
Elf32_Sword d_tag; /* Entry type. */
union {
Elf32_Word d_val; /* Integer value. */
Elf32_Addr d_ptr; /* Address value. */
} d_un;
} Elf32_Dyn;
/*
* Relocation entries.
*/
/* Relocations that don't need an addend field. */
typedef struct {
Elf32_Addr r_offset; /* Location to be relocated. */
Elf32_Word r_info; /* Relocation type and symbol index. */
} Elf32_Rel;
/* Relocations that need an addend field. */
typedef struct {
Elf32_Addr r_offset; /* Location to be relocated. */
Elf32_Word r_info; /* Relocation type and symbol index. */
Elf32_Sword r_addend; /* Addend. */
} Elf32_Rela;
/* Macros for accessing the fields of r_info. */
#define ELF32_R_SYM(info) ((info) >> 8)
#define ELF32_R_TYPE(info) ((unsigned char)(info))
/* Macro for constructing r_info from field values. */
#define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type))
/*
* Note entry header
*/
typedef Elf_Note Elf32_Nhdr;
/*
* Move entry
*/
typedef struct {
Elf32_Lword m_value; /* symbol value */
Elf32_Word m_info; /* size + index */
Elf32_Word m_poffset; /* symbol offset */
Elf32_Half m_repeat; /* repeat count */
Elf32_Half m_stride; /* stride info */
} Elf32_Move;
/*
* The macros compose and decompose values for Move.r_info
*
* sym = ELF32_M_SYM(M.m_info)
* size = ELF32_M_SIZE(M.m_info)
* M.m_info = ELF32_M_INFO(sym, size)
*/
#define ELF32_M_SYM(info) ((info)>>8)
#define ELF32_M_SIZE(info) ((unsigned char)(info))
#define ELF32_M_INFO(sym, size) (((sym)<<8)+(unsigned char)(size))
/*
* Hardware/Software capabilities entry
*/
typedef struct {
Elf32_Word c_tag; /* how to interpret value */
union {
Elf32_Word c_val;
Elf32_Addr c_ptr;
} c_un;
} Elf32_Cap;
/*
* Symbol table entries.
*/
typedef struct {
Elf32_Word st_name; /* String table index of name. */
Elf32_Addr st_value; /* Symbol value. */
Elf32_Word st_size; /* Size of associated object. */
unsigned char st_info; /* Type and binding information. */
unsigned char st_other; /* Reserved (not used). */
Elf32_Half st_shndx; /* Section index of symbol. */
} Elf32_Sym;
/* Macros for accessing the fields of st_info. */
#define ELF32_ST_BIND(info) ((info) >> 4)
#define ELF32_ST_TYPE(info) ((info) & 0xf)
/* Macro for constructing st_info from field values. */
#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
/* Macro for accessing the fields of st_other. */
#define ELF32_ST_VISIBILITY(oth) ((oth) & 0x3)
/* Structures used by Sun & GNU symbol versioning. */
typedef struct
{
Elf32_Half vd_version;
Elf32_Half vd_flags;
Elf32_Half vd_ndx;
Elf32_Half vd_cnt;
Elf32_Word vd_hash;
Elf32_Word vd_aux;
Elf32_Word vd_next;
} Elf32_Verdef;
typedef struct
{
Elf32_Word vda_name;
Elf32_Word vda_next;
} Elf32_Verdaux;
typedef struct
{
Elf32_Half vn_version;
Elf32_Half vn_cnt;
Elf32_Word vn_file;
Elf32_Word vn_aux;
Elf32_Word vn_next;
} Elf32_Verneed;
typedef struct
{
Elf32_Word vna_hash;
Elf32_Half vna_flags;
Elf32_Half vna_other;
Elf32_Word vna_name;
Elf32_Word vna_next;
} Elf32_Vernaux;
typedef Elf32_Half Elf32_Versym;
typedef struct {
Elf32_Half si_boundto; /* direct bindings - symbol bound to */
Elf32_Half si_flags; /* per symbol flags */
} Elf32_Syminfo;
#endif /* !_SYS_ELF32_H_ */

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UefiPayloadPkg/PayloadLoaderPeim/ElfLib/Elf32Lib.c Normal file
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/** @file
ELF library
Copyright (c) 2019 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "ElfLibInternal.h"
/**
Return the section header specified by Index.
@param ImageBase The image base.
@param Index The section index.
@return Pointer to the section header.
**/
Elf32_Shdr *
GetElf32SectionByIndex (
IN UINT8 *ImageBase,
IN UINT32 Index
)
{
Elf32_Ehdr *Ehdr;
Ehdr = (Elf32_Ehdr *)ImageBase;
if (Index >= Ehdr->e_shnum) {
return NULL;
}
return (Elf32_Shdr *)(ImageBase + Ehdr->e_shoff + Index * Ehdr->e_shentsize);
}
/**
Return the segment header specified by Index.
@param ImageBase The image base.
@param Index The segment index.
@return Pointer to the segment header.
**/
Elf32_Phdr *
GetElf32SegmentByIndex (
IN UINT8 *ImageBase,
IN UINT32 Index
)
{
Elf32_Ehdr *Ehdr;
Ehdr = (Elf32_Ehdr *)ImageBase;
if (Index >= Ehdr->e_phnum) {
return NULL;
}
return (Elf32_Phdr *)(ImageBase + Ehdr->e_phoff + Index * Ehdr->e_phentsize);
}
/**
Return the section header specified by the range.
@param ImageBase The image base.
@param Offset The section offset.
@param Size The section size.
@return Pointer to the section header.
**/
Elf32_Shdr *
GetElf32SectionByRange (
IN UINT8 *ImageBase,
IN UINT32 Offset,
IN UINT32 Size
)
{
UINT32 Index;
Elf32_Ehdr *Ehdr;
Elf32_Shdr *Shdr;
Ehdr = (Elf32_Ehdr *)ImageBase;
Shdr = (Elf32_Shdr *) (ImageBase + Ehdr->e_shoff);
for (Index = 0; Index < Ehdr->e_shnum; Index++) {
if ((Shdr->sh_offset == Offset) && (Shdr->sh_size == Size)) {
return Shdr;
}
Shdr = ELF_NEXT_ENTRY (Elf32_Shdr, Shdr, Ehdr->e_shentsize);
}
return NULL;
}
/**
Fix up the image based on the relocation entries.
@param Rela Relocation entries.
@param RelaSize Total size of relocation entries.
@param RelaEntrySize Relocation entry size.
@param RelaType Type of relocation entry.
@param Delta The delta between preferred image base and the actual image base.
@param DynamicLinking TRUE when fixing up according to dynamic relocation.
@retval EFI_SUCCESS The image fix up is processed successfully.
**/
EFI_STATUS
ProcessRelocation32 (
IN Elf32_Rela *Rela,
IN UINT32 RelaSize,
IN UINT32 RelaEntrySize,
IN UINT32 RelaType,
IN INTN Delta,
IN BOOLEAN DynamicLinking
)
{
UINTN Index;
UINT32 *Ptr;
UINT32 Type;
for ( Index = 0
; RelaEntrySize * Index < RelaSize
; Index++, Rela = ELF_NEXT_ENTRY (Elf32_Rela, Rela, RelaEntrySize)
) {
//
// r_offset is the virtual address of the storage unit affected by the relocation.
//
Ptr = (UINT32 *)(UINTN)(Rela->r_offset + Delta);
Type = ELF32_R_TYPE(Rela->r_info);
switch (Type) {
case R_386_NONE:
case R_386_PC32:
//
// No fixup entry required.
//
break;
case R_386_32:
if (DynamicLinking) {
//
// Dynamic section doesn't contain entries of this type.
//
DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
ASSERT (FALSE);
} else {
*Ptr += (UINT32) Delta;
}
break;
case R_386_RELATIVE:
if (DynamicLinking) {
//
// A: Represents the addend used to compute the value of the relocatable field.
// B: Represents the base address at which a shared object has been loaded into memory during execution.
// Generally, a shared object is built with a 0 base virtual address, but the execution address will be different.
//
// B (Base Address) in ELF spec is slightly different:
// An executable or shared object file's base address (on platforms that support the concept) is calculated during
// execution from three values: the virtual memory load address, the maximum page size, and the lowest virtual address
// of a program's loadable segment. To compute the base address, one determines the memory address associated with the
// lowest p_vaddr value for a PT_LOAD segment. This address is truncated to the nearest multiple of the maximum page size.
// The corresponding p_vaddr value itself is also truncated to the nearest multiple of the maximum page size.
//
// *** The base address is the difference between the truncated memory address and the truncated p_vaddr value. ***
//
// Delta in this function is B.
//
// Calculation: B + A
//
if (RelaType == SHT_RELA) {
ASSERT (*Ptr == 0);
*Ptr = (UINT32) Delta + Rela->r_addend;
} else {
//
// A is stored in the field of relocation for REL type.
//
*Ptr = (UINT32) Delta + *Ptr;
}
} else {
//
// non-Dynamic section doesn't contain entries of this type.
//
DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
ASSERT (FALSE);
}
break;
default:
DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
}
}
return EFI_SUCCESS;
}
/**
Relocate the DYN type image.
@param ElfCt Point to image context.
@retval EFI_SUCCESS The relocation succeeds.
@retval EFI_UNSUPPORTED The image doesn't contain a dynamic section.
**/
EFI_STATUS
RelocateElf32Dynamic (
IN ELF_IMAGE_CONTEXT *ElfCt
)
{
UINT32 Index;
Elf32_Phdr *Phdr;
Elf32_Shdr *DynShdr;
Elf32_Shdr *RelShdr;
Elf32_Dyn *Dyn;
UINT32 RelaOffset;
UINT32 RelaCount;
UINT32 RelaSize;
UINT32 RelaEntrySize;
UINT32 RelaType;
//
// 1. Locate the dynamic section.
//
// If an object file participates in dynamic linking, its program header table
// will have an element of type PT_DYNAMIC.
// This ``segment'' contains the .dynamic section. A special symbol, _DYNAMIC,
// labels the section, which contains an array of Elf32_Dyn or Elf64_Dyn.
//
DynShdr = NULL;
for (Index = 0; Index < ElfCt->PhNum; Index++) {
Phdr = GetElf32SegmentByIndex (ElfCt->FileBase, Index);
ASSERT (Phdr != NULL);
if (Phdr->p_type == PT_DYNAMIC) {
//
// Verify the existence of the dynamic section.
//
DynShdr = GetElf32SectionByRange (ElfCt->FileBase, Phdr->p_offset, Phdr->p_filesz);
break;
}
}
//
// It's abnormal a DYN ELF doesn't contain a dynamic section.
//
ASSERT (DynShdr != NULL);
if (DynShdr == NULL) {
return EFI_UNSUPPORTED;
}
ASSERT (DynShdr->sh_type == SHT_DYNAMIC);
ASSERT (DynShdr->sh_entsize >= sizeof (*Dyn));
//
// 2. Locate the relocation section from the dynamic section.
//
RelaOffset = MAX_UINT32;
RelaSize = 0;
RelaCount = 0;
RelaEntrySize = 0;
RelaType = 0;
for ( Index = 0, Dyn = (Elf32_Dyn *) (ElfCt->FileBase + DynShdr->sh_offset)
; Index < DynShdr->sh_size / DynShdr->sh_entsize
; Index++, Dyn = ELF_NEXT_ENTRY (Elf32_Dyn, Dyn, DynShdr->sh_entsize)
) {
switch (Dyn->d_tag) {
case DT_RELA:
case DT_REL:
//
// DT_REL represent program virtual addresses.
// A file's virtual addresses might not match the memory virtual addresses during execution.
// When interpreting addresses contained in the dynamic structure, the dynamic linker computes actual addresses,
// based on the original file value and the memory base address.
// For consistency, files do not contain relocation entries to ``correct'' addresses in the dynamic structure.
//
RelaOffset = Dyn->d_un.d_ptr - (UINT32) (UINTN) ElfCt->PreferredImageAddress;
RelaType = (Dyn->d_tag == DT_RELA) ? SHT_RELA: SHT_REL;
break;
case DT_RELACOUNT:
case DT_RELCOUNT:
RelaCount = Dyn->d_un.d_val;
break;
case DT_RELENT:
case DT_RELAENT:
RelaEntrySize = Dyn->d_un.d_val;
break;
case DT_RELSZ:
case DT_RELASZ:
RelaSize = Dyn->d_un.d_val;
break;
default:
break;
}
}
if (RelaOffset == MAX_UINT64) {
ASSERT (RelaCount == 0);
ASSERT (RelaEntrySize == 0);
ASSERT (RelaSize == 0);
//
// It's fine that a DYN ELF doesn't contain relocation section.
//
return EFI_SUCCESS;
}
//
// Verify the existence of the relocation section.
//
RelShdr = GetElf32SectionByRange (ElfCt->FileBase, RelaOffset, RelaSize);
ASSERT (RelShdr != NULL);
if (RelShdr == NULL) {
return EFI_UNSUPPORTED;
}
ASSERT (RelShdr->sh_type == RelaType);
ASSERT (RelShdr->sh_entsize == RelaEntrySize);
//
// 3. Process the relocation section.
//
ProcessRelocation32 (
(Elf32_Rela *) (ElfCt->FileBase + RelShdr->sh_offset),
RelShdr->sh_size, RelShdr->sh_entsize, RelShdr->sh_type,
(UINTN) ElfCt->ImageAddress - (UINTN) ElfCt->PreferredImageAddress,
TRUE
);
return EFI_SUCCESS;
}
/**
Relocate all sections in a ELF image.
@param[in] ElfCt ELF image context pointer.
@retval EFI_UNSUPPORTED Relocation is not supported.
@retval EFI_SUCCESS ELF image was relocated successfully.
**/
EFI_STATUS
RelocateElf32Sections (
IN ELF_IMAGE_CONTEXT *ElfCt
)
{
EFI_STATUS Status;
Elf32_Ehdr *Ehdr;
Elf32_Shdr *RelShdr;
Elf32_Shdr *Shdr;
UINT32 Index;
UINTN Delta;
Ehdr = (Elf32_Ehdr *)ElfCt->FileBase;
if (Ehdr->e_machine != EM_386) {
return EFI_UNSUPPORTED;
}
Delta = (UINTN) ElfCt->ImageAddress - (UINTN) ElfCt->PreferredImageAddress;
ElfCt->EntryPoint = (UINTN)(Ehdr->e_entry + Delta);
//
// 1. Relocate dynamic ELF using the relocation section pointed by dynamic section
//
if (Ehdr->e_type == ET_DYN) {
DEBUG ((DEBUG_INFO, "DYN ELF: Relocate using dynamic sections...\n"));
Status = RelocateElf32Dynamic (ElfCt);
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// 2. Executable ELF: Fix up the delta between actual image address and preferred image address.
//
// Linker already fixed up EXEC ELF based on the preferred image address.
// A ELF loader in modern OS only loads it into the preferred image address.
// The below relocation is unneeded in that case.
// But the ELF loader in firmware supports to load the image to a different address.
// The below relocation is needed in this case.
//
DEBUG ((DEBUG_INFO, "EXEC ELF: Fix actual/preferred base address delta ...\n"));
for ( Index = 0, RelShdr = (Elf32_Shdr *) (ElfCt->FileBase + Ehdr->e_shoff)
; Index < Ehdr->e_shnum
; Index++, RelShdr = ELF_NEXT_ENTRY (Elf32_Shdr, RelShdr, Ehdr->e_shentsize)
) {
if ((RelShdr->sh_type != SHT_REL) && (RelShdr->sh_type != SHT_RELA)) {
continue;
}
Shdr = GetElf32SectionByIndex (ElfCt->FileBase, RelShdr->sh_info);
if ((Shdr->sh_flags & SHF_ALLOC) == SHF_ALLOC) {
//
// Only fix up sections that occupy memory during process execution.
//
ProcessRelocation32 (
(Elf32_Rela *)((UINT8*)Ehdr + RelShdr->sh_offset),
RelShdr->sh_size, RelShdr->sh_entsize, RelShdr->sh_type,
Delta, FALSE
);
}
}
return EFI_SUCCESS;
}
/**
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.
@param[in] ElfCt ELF image context pointer.
@retval EFI_SUCCESS ELF binary is loaded successfully.
@retval Others Loading ELF binary fails.
**/
EFI_STATUS
LoadElf32Image (
IN ELF_IMAGE_CONTEXT *ElfCt
)
{
Elf32_Ehdr *Ehdr;
Elf32_Phdr *Phdr;
UINT16 Index;
UINTN Delta;
ASSERT (ElfCt != NULL);
//
// Per the sprit of ELF, loading to memory only consumes info from program headers.
//
Ehdr = (Elf32_Ehdr *)ElfCt->FileBase;
for ( Index = 0, Phdr = (Elf32_Phdr *)(ElfCt->FileBase + Ehdr->e_phoff)
; Index < Ehdr->e_phnum
; Index++, Phdr = ELF_NEXT_ENTRY (Elf32_Phdr, Phdr, Ehdr->e_phentsize)
) {
//
// Skip segments that don't require load (type tells, or size is 0)
//
if ((Phdr->p_type != PT_LOAD) ||
(Phdr->p_memsz == 0)) {
continue;
}
//
// The memory offset of segment relative to the image base
// Note: CopyMem() does nothing when the dst equals to src.
//
Delta = Phdr->p_paddr - (UINT32) (UINTN) ElfCt->PreferredImageAddress;
CopyMem (ElfCt->ImageAddress + Delta, ElfCt->FileBase + Phdr->p_offset, Phdr->p_filesz);
ZeroMem (ElfCt->ImageAddress + Delta + Phdr->p_filesz, Phdr->p_memsz - Phdr->p_filesz);
}
//
// Relocate when new new image base is not the preferred image base.
//
if (ElfCt->ImageAddress != ElfCt->PreferredImageAddress) {
RelocateElf32Sections (ElfCt);
}
return EFI_SUCCESS;
}

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/** @file
Ported ELF include files from FreeBSD
Copyright (c) 2009 - 2010, Apple Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
/*-
* Copyright (c) 1996-1998 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/sys/elf64.h,v 1.10.14.2 2007/12/03 21:30:36 marius Exp $
*/
#ifndef _SYS_ELF64_H_
#define _SYS_ELF64_H_ 1
/*
* ELF definitions common to all 64-bit architectures.
*/
typedef UINT64 Elf64_Addr;
typedef UINT16 Elf64_Half;
typedef UINT64 Elf64_Off;
typedef INT32 Elf64_Sword;
typedef INT64 Elf64_Sxword;
typedef UINT32 Elf64_Word;
typedef UINT64 Elf64_Lword;
typedef UINT64 Elf64_Xword;
/*
* Types of dynamic symbol hash table bucket and chain elements.
*
* This is inconsistent among 64 bit architectures, so a machine dependent
* typedef is required.
*/
typedef Elf64_Word Elf64_Hashelt;
/* Non-standard class-dependent datatype used for abstraction. */
typedef Elf64_Xword Elf64_Size;
typedef Elf64_Sxword Elf64_Ssize;
/*
* ELF header.
*/
typedef struct {
unsigned char e_ident[EI_NIDENT]; /* File identification. */
Elf64_Half e_type; /* File type. */
Elf64_Half e_machine; /* Machine architecture. */
Elf64_Word e_version; /* ELF format version. */
Elf64_Addr e_entry; /* Entry point. */
Elf64_Off e_phoff; /* Program header file offset. */
Elf64_Off e_shoff; /* Section header file offset. */
Elf64_Word e_flags; /* Architecture-specific flags. */
Elf64_Half e_ehsize; /* Size of ELF header in bytes. */
Elf64_Half e_phentsize; /* Size of program header entry. */
Elf64_Half e_phnum; /* Number of program header entries. */
Elf64_Half e_shentsize; /* Size of section header entry. */
Elf64_Half e_shnum; /* Number of section header entries. */
Elf64_Half e_shstrndx; /* Section name strings section. */
} Elf64_Ehdr;
/*
* Section header.
*/
typedef struct {
Elf64_Word sh_name; /* Section name (index into the
section header string table). */
Elf64_Word sh_type; /* Section type. */
Elf64_Xword sh_flags; /* Section flags. */
Elf64_Addr sh_addr; /* Address in memory image. */
Elf64_Off sh_offset; /* Offset in file. */
Elf64_Xword sh_size; /* Size in bytes. */
Elf64_Word sh_link; /* Index of a related section. */
Elf64_Word sh_info; /* Depends on section type. */
Elf64_Xword sh_addralign; /* Alignment in bytes. */
Elf64_Xword sh_entsize; /* Size of each entry in section. */
} Elf64_Shdr;
/*
* Program header.
*/
typedef struct {
Elf64_Word p_type; /* Entry type. */
Elf64_Word p_flags; /* Access permission flags. */
Elf64_Off p_offset; /* File offset of contents. */
Elf64_Addr p_vaddr; /* Virtual address in memory image. */
Elf64_Addr p_paddr; /* Physical address (not used). */
Elf64_Xword p_filesz; /* Size of contents in file. */
Elf64_Xword p_memsz; /* Size of contents in memory. */
Elf64_Xword p_align; /* Alignment in memory and file. */
} Elf64_Phdr;
/*
* Dynamic structure. The ".dynamic" section contains an array of them.
*/
typedef struct {
Elf64_Sxword d_tag; /* Entry type. */
union {
Elf64_Xword d_val; /* Integer value. */
Elf64_Addr d_ptr; /* Address value. */
} d_un;
} Elf64_Dyn;
/*
* Relocation entries.
*/
/* Relocations that don't need an addend field. */
typedef struct {
Elf64_Addr r_offset; /* Location to be relocated. */
Elf64_Xword r_info; /* Relocation type and symbol index. */
} Elf64_Rel;
/* Relocations that need an addend field. */
typedef struct {
Elf64_Addr r_offset; /* Location to be relocated. */
Elf64_Xword r_info; /* Relocation type and symbol index. */
Elf64_Sxword r_addend; /* Addend. */
} Elf64_Rela;
/* Macros for accessing the fields of r_info. */
#define ELF64_R_SYM(info) ((UINT32) RShiftU64 ((info), 32))
#define ELF64_R_TYPE(info) ((info) & 0xffffffffL)
/* Macro for constructing r_info from field values. */
#define ELF64_R_INFO(sym, type) (((sym) << 32) + ((type) & 0xffffffffL))
#define ELF64_R_TYPE_DATA(info) (((Elf64_Xword)(info)<<32)>>40)
#define ELF64_R_TYPE_ID(info) (((Elf64_Xword)(info)<<56)>>56)
#define ELF64_R_TYPE_INFO(data, type) \
(((Elf64_Xword)(data)<<8)+(Elf64_Xword)(type))
/*
* Note entry header
*/
typedef Elf_Note Elf64_Nhdr;
/*
* Move entry
*/
typedef struct {
Elf64_Lword m_value; /* symbol value */
Elf64_Xword m_info; /* size + index */
Elf64_Xword m_poffset; /* symbol offset */
Elf64_Half m_repeat; /* repeat count */
Elf64_Half m_stride; /* stride info */
} Elf64_Move;
#define ELF64_M_SYM(info) ((info)>>8)
#define ELF64_M_SIZE(info) ((unsigned char)(info))
#define ELF64_M_INFO(sym, size) (((sym)<<8)+(unsigned char)(size))
/*
* Hardware/Software capabilities entry
*/
typedef struct {
Elf64_Xword c_tag; /* how to interpret value */
union {
Elf64_Xword c_val;
Elf64_Addr c_ptr;
} c_un;
} Elf64_Cap;
/*
* Symbol table entries.
*/
typedef struct {
Elf64_Word st_name; /* String table index of name. */
unsigned char st_info; /* Type and binding information. */
unsigned char st_other; /* Reserved (not used). */
Elf64_Half st_shndx; /* Section index of symbol. */
Elf64_Addr st_value; /* Symbol value. */
Elf64_Xword st_size; /* Size of associated object. */
} Elf64_Sym;
/* Macros for accessing the fields of st_info. */
#define ELF64_ST_BIND(info) ((info) >> 4)
#define ELF64_ST_TYPE(info) ((info) & 0xf)
/* Macro for constructing st_info from field values. */
#define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf))
/* Macro for accessing the fields of st_other. */
#define ELF64_ST_VISIBILITY(oth) ((oth) & 0x3)
/* Structures used by Sun & GNU-style symbol versioning. */
typedef struct {
Elf64_Half vd_version;
Elf64_Half vd_flags;
Elf64_Half vd_ndx;
Elf64_Half vd_cnt;
Elf64_Word vd_hash;
Elf64_Word vd_aux;
Elf64_Word vd_next;
} Elf64_Verdef;
typedef struct {
Elf64_Word vda_name;
Elf64_Word vda_next;
} Elf64_Verdaux;
typedef struct {
Elf64_Half vn_version;
Elf64_Half vn_cnt;
Elf64_Word vn_file;
Elf64_Word vn_aux;
Elf64_Word vn_next;
} Elf64_Verneed;
typedef struct {
Elf64_Word vna_hash;
Elf64_Half vna_flags;
Elf64_Half vna_other;
Elf64_Word vna_name;
Elf64_Word vna_next;
} Elf64_Vernaux;
typedef Elf64_Half Elf64_Versym;
typedef struct {
Elf64_Half si_boundto; /* direct bindings - symbol bound to */
Elf64_Half si_flags; /* per symbol flags */
} Elf64_Syminfo;
#endif /* !_SYS_ELF64_H_ */

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/** @file
ELF library
Copyright (c) 2019 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "ElfLibInternal.h"
/**
Return the section header specified by Index.
@param ImageBase The image base.
@param Index The section index.
@return Pointer to the section header.
**/
Elf64_Shdr *
GetElf64SectionByIndex (
IN UINT8 *ImageBase,
IN UINT32 Index
)
{
Elf64_Ehdr *Ehdr;
Ehdr = (Elf64_Ehdr *)ImageBase;
if (Index >= Ehdr->e_shnum) {
return NULL;
}
return (Elf64_Shdr *)(ImageBase + Ehdr->e_shoff + Index * Ehdr->e_shentsize);
}
/**
Return the segment header specified by Index.
@param ImageBase The image base.
@param Index The segment index.
@return Pointer to the segment header.
**/
Elf64_Phdr *
GetElf64SegmentByIndex (
IN UINT8 *ImageBase,
IN UINT32 Index
)
{
Elf64_Ehdr *Ehdr;
Ehdr = (Elf64_Ehdr *)ImageBase;
if (Index >= Ehdr->e_phnum) {
return NULL;
}
return (Elf64_Phdr *)(ImageBase + Ehdr->e_phoff + Index * Ehdr->e_phentsize);
}
/**
Return the section header specified by the range.
@param ImageBase The image base.
@param Offset The section offset.
@param Size The section size.
@return Pointer to the section header.
**/
Elf64_Shdr *
GetElf64SectionByRange (
IN UINT8 *ImageBase,
IN UINT64 Offset,
IN UINT64 Size
)
{
UINT32 Index;
Elf64_Ehdr *Ehdr;
Elf64_Shdr *Shdr;
Ehdr = (Elf64_Ehdr *)ImageBase;
Shdr = (Elf64_Shdr *) (ImageBase + Ehdr->e_shoff);
for (Index = 0; Index < Ehdr->e_shnum; Index++) {
if ((Shdr->sh_offset == Offset) && (Shdr->sh_size == Size)) {
return Shdr;
}
Shdr = ELF_NEXT_ENTRY (Elf64_Shdr, Shdr, Ehdr->e_shentsize);
}
return NULL;
}
/**
Fix up the image based on the relocation entries.
@param Rela Relocation entries.
@param RelaSize Total size of relocation entries.
@param RelaEntrySize Relocation entry size.
@param RelaType Type of relocation entry.
@param Delta The delta between preferred image base and the actual image base.
@param DynamicLinking TRUE when fixing up according to dynamic relocation.
@retval EFI_SUCCESS The image fix up is processed successfully.
**/
EFI_STATUS
ProcessRelocation64 (
IN Elf64_Rela *Rela,
IN UINT64 RelaSize,
IN UINT64 RelaEntrySize,
IN UINT64 RelaType,
IN INTN Delta,
IN BOOLEAN DynamicLinking
)
{
UINTN Index;
UINT64 *Ptr;
UINT32 Type;
for ( Index = 0
; MultU64x64 (RelaEntrySize, Index) < RelaSize
; Index++, Rela = ELF_NEXT_ENTRY (Elf64_Rela, Rela, RelaEntrySize)
) {
//
// r_offset is the virtual address of the storage unit affected by the relocation.
//
Ptr = (UINT64 *)(UINTN)(Rela->r_offset + Delta);
Type = ELF64_R_TYPE(Rela->r_info);
switch (Type) {
case R_X86_64_NONE:
case R_X86_64_PC32:
case R_X86_64_PLT32:
case R_X86_64_GOTPCREL:
case R_X86_64_GOTPCRELX:
case R_X86_64_REX_GOTPCRELX:
break;
case R_X86_64_64:
if (DynamicLinking) {
//
// Dynamic section doesn't contain entries of this type.
//
DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
ASSERT (FALSE);
} else {
*Ptr += Delta;
}
break;
case R_X86_64_32:
//
// Dynamic section doesn't contain entries of this type.
//
DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
ASSERT (FALSE);
break;
case R_X86_64_RELATIVE:
if (DynamicLinking) {
//
// A: Represents the addend used to compute the value of the relocatable field.
// B: Represents the base address at which a shared object has been loaded into memory during execution.
// Generally, a shared object is built with a 0 base virtual address, but the execution address will be different.
//
// B (Base Address) in ELF spec is slightly different:
// An executable or shared object file's base address (on platforms that support the concept) is calculated during
// execution from three values: the virtual memory load address, the maximum page size, and the lowest virtual address
// of a program's loadable segment. To compute the base address, one determines the memory address associated with the
// lowest p_vaddr value for a PT_LOAD segment. This address is truncated to the nearest multiple of the maximum page size.
// The corresponding p_vaddr value itself is also truncated to the nearest multiple of the maximum page size.
//
// *** The base address is the difference between the truncated memory address and the truncated p_vaddr value. ***
//
// Delta in this function is B.
//
// Calculation: B + A
//
if (RelaType == SHT_RELA) {
ASSERT (*Ptr == 0);
*Ptr = Delta + Rela->r_addend;
} else {
//
// A is stored in the field of relocation for REL type.
//
*Ptr = Delta + *Ptr;
}
} else {
//
// non-Dynamic section doesn't contain entries of this type.
//
DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
ASSERT (FALSE);
}
break;
default:
DEBUG ((DEBUG_INFO, "Unsupported relocation type %02X\n", Type));
}
}
return EFI_SUCCESS;
}
/**
Relocate the DYN type image.
@param ElfCt Point to image context.
@retval EFI_SUCCESS The relocation succeeds.
@retval EFI_UNSUPPORTED The image doesn't contain a dynamic section.
**/
EFI_STATUS
RelocateElf64Dynamic (
IN ELF_IMAGE_CONTEXT *ElfCt
)
{
UINT32 Index;
Elf64_Phdr *Phdr;
Elf64_Shdr *DynShdr;
Elf64_Shdr *RelShdr;
Elf64_Dyn *Dyn;
UINT64 RelaOffset;
UINT64 RelaCount;
UINT64 RelaSize;
UINT64 RelaEntrySize;
UINT64 RelaType;
//
// 1. Locate the dynamic section.
//
// If an object file participates in dynamic linking, its program header table
// will have an element of type PT_DYNAMIC.
// This ``segment'' contains the .dynamic section. A special symbol, _DYNAMIC,
// labels the section, which contains an array of Elf32_Dyn or Elf64_Dyn.
//
DynShdr = NULL;
for (Index = 0; Index < ElfCt->PhNum; Index++) {
Phdr = GetElf64SegmentByIndex (ElfCt->FileBase, Index);
ASSERT (Phdr != NULL);
if (Phdr->p_type == PT_DYNAMIC) {
//
// Verify the existence of the dynamic section.
//
DynShdr = GetElf64SectionByRange (ElfCt->FileBase, Phdr->p_offset, Phdr->p_filesz);
break;
}
}
//
// It's abnormal a DYN ELF doesn't contain a dynamic section.
//
ASSERT (DynShdr != NULL);
if (DynShdr == NULL) {
return EFI_UNSUPPORTED;
}
ASSERT (DynShdr->sh_type == SHT_DYNAMIC);
ASSERT (DynShdr->sh_entsize >= sizeof (*Dyn));
//
// 2. Locate the relocation section from the dynamic section.
//
RelaOffset = MAX_UINT64;
RelaSize = 0;
RelaCount = 0;
RelaEntrySize = 0;
RelaType = 0;
for ( Index = 0, Dyn = (Elf64_Dyn *) (ElfCt->FileBase + DynShdr->sh_offset)
; Index < DivU64x64Remainder (DynShdr->sh_size, DynShdr->sh_entsize, NULL)
; Index++, Dyn = ELF_NEXT_ENTRY (Elf64_Dyn, Dyn, DynShdr->sh_entsize)
) {
switch (Dyn->d_tag) {
case DT_RELA:
case DT_REL:
//
// DT_REL represent program virtual addresses.
// A file's virtual addresses might not match the memory virtual addresses during execution.
// When interpreting addresses contained in the dynamic structure, the dynamic linker computes actual addresses,
// based on the original file value and the memory base address.
// For consistency, files do not contain relocation entries to ``correct'' addresses in the dynamic structure.
//
RelaOffset = Dyn->d_un.d_ptr - (UINTN) ElfCt->PreferredImageAddress;
RelaType = (Dyn->d_tag == DT_RELA) ? SHT_RELA: SHT_REL;
break;
case DT_RELACOUNT:
case DT_RELCOUNT:
RelaCount = Dyn->d_un.d_val;
break;
case DT_RELENT:
case DT_RELAENT:
RelaEntrySize = Dyn->d_un.d_val;
break;
case DT_RELSZ:
case DT_RELASZ:
RelaSize = Dyn->d_un.d_val;
break;
default:
break;
}
}
if (RelaOffset == MAX_UINT64) {
ASSERT (RelaCount == 0);
ASSERT (RelaEntrySize == 0);
ASSERT (RelaSize == 0);
//
// It's fine that a DYN ELF doesn't contain relocation section.
//
return EFI_SUCCESS;
}
//
// Verify the existence of the relocation section.
//
RelShdr = GetElf64SectionByRange (ElfCt->FileBase, RelaOffset, RelaSize);
ASSERT (RelShdr != NULL);
if (RelShdr == NULL) {
return EFI_UNSUPPORTED;
}
ASSERT (RelShdr->sh_type == RelaType);
ASSERT (RelShdr->sh_entsize == RelaEntrySize);
//
// 3. Process the relocation section.
//
ProcessRelocation64 (
(Elf64_Rela *) (ElfCt->FileBase + RelShdr->sh_offset),
RelShdr->sh_size, RelShdr->sh_entsize, RelShdr->sh_type,
(UINTN) ElfCt->ImageAddress - (UINTN) ElfCt->PreferredImageAddress,
TRUE
);
return EFI_SUCCESS;
}
/**
Relocate all sections in a ELF image.
@param[in] ElfCt ELF image context pointer.
@retval EFI_UNSUPPORTED Relocation is not supported.
@retval EFI_SUCCESS ELF image was relocated successfully.
**/
EFI_STATUS
RelocateElf64Sections (
IN ELF_IMAGE_CONTEXT *ElfCt
)
{
EFI_STATUS Status;
Elf64_Ehdr *Ehdr;
Elf64_Shdr *RelShdr;
Elf64_Shdr *Shdr;
UINT32 Index;
UINTN Delta;
Ehdr = (Elf64_Ehdr *)ElfCt->FileBase;
if (Ehdr->e_machine != EM_X86_64) {
return EFI_UNSUPPORTED;
}
Delta = (UINTN) ElfCt->ImageAddress - (UINTN) ElfCt->PreferredImageAddress;
ElfCt->EntryPoint = (UINTN)(Ehdr->e_entry + Delta);
//
// 1. Relocate dynamic ELF using the relocation section pointed by dynamic section
//
if (Ehdr->e_type == ET_DYN) {
DEBUG ((DEBUG_INFO, "DYN ELF: Relocate using dynamic sections...\n"));
Status = RelocateElf64Dynamic (ElfCt);
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// 2. Executable ELF: Fix up the delta between actual image address and preferred image address.
//
// Linker already fixed up EXEC ELF based on the preferred image address.
// A ELF loader in modern OS only loads it into the preferred image address.
// The below relocation is unneeded in that case.
// But the ELF loader in firmware supports to load the image to a different address.
// The below relocation is needed in this case.
//
DEBUG ((DEBUG_INFO, "EXEC ELF: Fix actual/preferred base address delta ...\n"));
for ( Index = 0, RelShdr = (Elf64_Shdr *) (ElfCt->FileBase + Ehdr->e_shoff)
; Index < Ehdr->e_shnum
; Index++, RelShdr = ELF_NEXT_ENTRY (Elf64_Shdr, RelShdr, Ehdr->e_shentsize)
) {
if ((RelShdr->sh_type != SHT_REL) && (RelShdr->sh_type != SHT_RELA)) {
continue;
}
Shdr = GetElf64SectionByIndex (ElfCt->FileBase, RelShdr->sh_info);
if ((Shdr->sh_flags & SHF_ALLOC) == SHF_ALLOC) {
//
// Only fix up sections that occupy memory during process execution.
//
ProcessRelocation64 (
(Elf64_Rela *)((UINT8*)Ehdr + RelShdr->sh_offset),
RelShdr->sh_size, RelShdr->sh_entsize, RelShdr->sh_type,
Delta, FALSE
);
}
}
return EFI_SUCCESS;
}
/**
Load ELF image which has 64-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.
@param[in] ElfCt ELF image context pointer.
@retval EFI_SUCCESS ELF binary is loaded successfully.
@retval Others Loading ELF binary fails.
**/
EFI_STATUS
LoadElf64Image (
IN ELF_IMAGE_CONTEXT *ElfCt
)
{
Elf64_Ehdr *Ehdr;
Elf64_Phdr *Phdr;
UINT16 Index;
UINTN Delta;
ASSERT (ElfCt != NULL);
//
// Per the sprit of ELF, loading to memory only consumes info from program headers.
//
Ehdr = (Elf64_Ehdr *)ElfCt->FileBase;
for ( Index = 0, Phdr = (Elf64_Phdr *)(ElfCt->FileBase + Ehdr->e_phoff)
; Index < Ehdr->e_phnum
; Index++, Phdr = ELF_NEXT_ENTRY (Elf64_Phdr, Phdr, Ehdr->e_phentsize)
) {
//
// Skip segments that don't require load (type tells, or size is 0)
//
if ((Phdr->p_type != PT_LOAD) ||
(Phdr->p_memsz == 0)) {
continue;
}
//
// The memory offset of segment relative to the image base
// Note: CopyMem() does nothing when the dst equals to src.
//
Delta = (UINTN) Phdr->p_paddr - (UINTN) ElfCt->PreferredImageAddress;
CopyMem (ElfCt->ImageAddress + Delta, ElfCt->FileBase + (UINTN) Phdr->p_offset, (UINTN) Phdr->p_filesz);
ZeroMem (ElfCt->ImageAddress + Delta + (UINTN) Phdr->p_filesz, (UINTN) (Phdr->p_memsz - Phdr->p_filesz));
}
//
// Relocate when new new image base is not the preferred image base.
//
if (ElfCt->ImageAddress != ElfCt->PreferredImageAddress) {
RelocateElf64Sections (ElfCt);
}
return EFI_SUCCESS;
}

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/** @file
Ported ELF include files from FreeBSD
Copyright (c) 2009 - 2010, Apple Inc. All rights reserved.<BR>
Portions Copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
/*-
* Copyright (c) 1998 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/sys/elf_common.h,v 1.15.8.2 2007/12/03 21:30:36 marius Exp $
*/
#ifndef _SYS_ELF_COMMON_H_
#define _SYS_ELF_COMMON_H_ 1
/*
* ELF definitions that are independent of architecture or word size.
*/
/*
* Note header. The ".note" section contains an array of notes. Each
* begins with this header, aligned to a word boundary. Immediately
* following the note header is n_namesz bytes of name, padded to the
* next word boundary. Then comes n_descsz bytes of descriptor, again
* padded to a word boundary. The values of n_namesz and n_descsz do
* not include the padding.
*/
typedef struct {
UINT32 n_namesz; /* Length of name. */
UINT32 n_descsz; /* Length of descriptor. */
UINT32 n_type; /* Type of this note. */
} Elf_Note;
/* Indexes into the e_ident array. Keep synced with
http://www.sco.com/developers/gabi/latest/ch4.eheader.html */
#define EI_MAG0 0 /* Magic number, byte 0. */
#define EI_MAG1 1 /* Magic number, byte 1. */
#define EI_MAG2 2 /* Magic number, byte 2. */
#define EI_MAG3 3 /* Magic number, byte 3. */
#define EI_CLASS 4 /* Class of machine. */
#define EI_DATA 5 /* Data format. */
#define EI_VERSION 6 /* ELF format version. */
#define EI_OSABI 7 /* Operating system / ABI identification */
#define EI_ABIVERSION 8 /* ABI version */
#define OLD_EI_BRAND 8 /* Start of architecture identification. */
#define EI_PAD 9 /* Start of padding (per SVR4 ABI). */
#define EI_NIDENT 16 /* Size of e_ident array. */
/* Values for the magic number bytes. */
#define ELFMAG0 0x7f
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
#define ELFMAG "\177ELF" /* magic string */
#define SELFMAG 4 /* magic string size */
/* Values for e_ident[EI_VERSION] and e_version. */
#define EV_NONE 0
#define EV_CURRENT 1
/* Values for e_ident[EI_CLASS]. */
#define ELFCLASSNONE 0 /* Unknown class. */
#define ELFCLASS32 1 /* 32-bit architecture. */
#define ELFCLASS64 2 /* 64-bit architecture. */
/* Values for e_ident[EI_DATA]. */
#define ELFDATANONE 0 /* Unknown data format. */
#define ELFDATA2LSB 1 /* 2's complement little-endian. */
#define ELFDATA2MSB 2 /* 2's complement big-endian. */
/* Values for e_ident[EI_OSABI]. */
#define ELFOSABI_NONE 0 /* UNIX System V ABI */
#define ELFOSABI_HPUX 1 /* HP-UX operating system */
#define ELFOSABI_NETBSD 2 /* NetBSD */
#define ELFOSABI_LINUX 3 /* GNU/Linux */
#define ELFOSABI_HURD 4 /* GNU/Hurd */
#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */
#define ELFOSABI_SOLARIS 6 /* Solaris */
#define ELFOSABI_AIX 7 /* AIX */
#define ELFOSABI_IRIX 8 /* IRIX */
#define ELFOSABI_FREEBSD 9 /* FreeBSD */
#define ELFOSABI_TRU64 10 /* TRU64 UNIX */
#define ELFOSABI_MODESTO 11 /* Novell Modesto */
#define ELFOSABI_OPENBSD 12 /* OpenBSD */
#define ELFOSABI_OPENVMS 13 /* Open VMS */
#define ELFOSABI_NSK 14 /* HP Non-Stop Kernel */
#define ELFOSABI_ARM 97 /* ARM */
#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
#define ELFOSABI_SYSV ELFOSABI_NONE /* symbol used in old spec */
#define ELFOSABI_MONTEREY ELFOSABI_AIX /* Monterey */
/* e_ident */
#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
(ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
(ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
(ehdr).e_ident[EI_MAG3] == ELFMAG3)
/* Values for e_type. */
#define ET_NONE 0 /* Unknown type. */
#define ET_REL 1 /* Relocatable. */
#define ET_EXEC 2 /* Executable. */
#define ET_DYN 3 /* Shared object. */
#define ET_CORE 4 /* Core file. */
#define ET_LOOS 0xfe00 /* First operating system specific. */
#define ET_HIOS 0xfeff /* Last operating system-specific. */
#define ET_LOPROC 0xff00 /* First processor-specific. */
#define ET_HIPROC 0xffff /* Last processor-specific. */
/* Values for e_machine. */
#define EM_NONE 0 /* Unknown machine. */
#define EM_M32 1 /* AT&T WE32100. */
#define EM_SPARC 2 /* Sun SPARC. */
#define EM_386 3 /* Intel i386. */
#define EM_68K 4 /* Motorola 68000. */
#define EM_88K 5 /* Motorola 88000. */
#define EM_860 7 /* Intel i860. */
#define EM_MIPS 8 /* MIPS R3000 Big-Endian only. */
#define EM_S370 9 /* IBM System/370. */
#define EM_MIPS_RS3_LE 10 /* MIPS R3000 Little-Endian. */
#define EM_PARISC 15 /* HP PA-RISC. */
#define EM_VPP500 17 /* Fujitsu VPP500. */
#define EM_SPARC32PLUS 18 /* SPARC v8plus. */
#define EM_960 19 /* Intel 80960. */
#define EM_PPC 20 /* PowerPC 32-bit. */
#define EM_PPC64 21 /* PowerPC 64-bit. */
#define EM_S390 22 /* IBM System/390. */
#define EM_V800 36 /* NEC V800. */
#define EM_FR20 37 /* Fujitsu FR20. */
#define EM_RH32 38 /* TRW RH-32. */
#define EM_RCE 39 /* Motorola RCE. */
#define EM_ARM 40 /* ARM. */
#define EM_SH 42 /* Hitachi SH. */
#define EM_SPARCV9 43 /* SPARC v9 64-bit. */
#define EM_TRICORE 44 /* Siemens TriCore embedded processor. */
#define EM_ARC 45 /* Argonaut RISC Core. */
#define EM_H8_300 46 /* Hitachi H8/300. */
#define EM_H8_300H 47 /* Hitachi H8/300H. */
#define EM_H8S 48 /* Hitachi H8S. */
#define EM_H8_500 49 /* Hitachi H8/500. */
#define EM_MIPS_X 51 /* Stanford MIPS-X. */
#define EM_COLDFIRE 52 /* Motorola ColdFire. */
#define EM_68HC12 53 /* Motorola M68HC12. */
#define EM_MMA 54 /* Fujitsu MMA. */
#define EM_PCP 55 /* Siemens PCP. */
#define EM_NCPU 56 /* Sony nCPU. */
#define EM_NDR1 57 /* Denso NDR1 microprocessor. */
#define EM_STARCORE 58 /* Motorola Star*Core processor. */
#define EM_ME16 59 /* Toyota ME16 processor. */
#define EM_ST100 60 /* STMicroelectronics ST100 processor. */
#define EM_TINYJ 61 /* Advanced Logic Corp. TinyJ processor. */
#define EM_X86_64 62 /* Advanced Micro Devices x86-64 */
#define EM_AMD64 EM_X86_64 /* Advanced Micro Devices x86-64 (compat) */
#define EM_AARCH64 183 /* ARM 64bit Architecture */
/* Non-standard or deprecated. */
#define EM_486 6 /* Intel i486. */
#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */
#define EM_ALPHA_STD 41 /* Digital Alpha (standard value). */
#define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI) */
/* Special section indexes. */
#define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */
#define SHN_LORESERVE 0xff00 /* First of reserved range. */
#define SHN_LOPROC 0xff00 /* First processor-specific. */
#define SHN_HIPROC 0xff1f /* Last processor-specific. */
#define SHN_LOOS 0xff20 /* First operating system-specific. */
#define SHN_HIOS 0xff3f /* Last operating system-specific. */
#define SHN_ABS 0xfff1 /* Absolute values. */
#define SHN_COMMON 0xfff2 /* Common data. */
#define SHN_XINDEX 0xffff /* Escape -- index stored elsewhere. */
#define SHN_HIRESERVE 0xffff /* Last of reserved range. */
/* sh_type */
#define SHT_NULL 0 /* inactive */
#define SHT_PROGBITS 1 /* program defined information */
#define SHT_SYMTAB 2 /* symbol table section */
#define SHT_STRTAB 3 /* string table section */
#define SHT_RELA 4 /* relocation section with addends */
#define SHT_HASH 5 /* symbol hash table section */
#define SHT_DYNAMIC 6 /* dynamic section */
#define SHT_NOTE 7 /* note section */
#define SHT_NOBITS 8 /* no space section */
#define SHT_REL 9 /* relocation section - no addends */
#define SHT_SHLIB 10 /* reserved - purpose unknown */
#define SHT_DYNSYM 11 /* dynamic symbol table section */
#define SHT_INIT_ARRAY 14 /* Initialization function pointers. */
#define SHT_FINI_ARRAY 15 /* Termination function pointers. */
#define SHT_PREINIT_ARRAY 16 /* Pre-initialization function ptrs. */
#define SHT_GROUP 17 /* Section group. */
#define SHT_SYMTAB_SHNDX 18 /* Section indexes (see SHN_XINDEX). */
#define SHT_LOOS 0x60000000 /* First of OS specific semantics */
#define SHT_LOSUNW 0x6ffffff4
#define SHT_SUNW_dof 0x6ffffff4
#define SHT_SUNW_cap 0x6ffffff5
#define SHT_SUNW_SIGNATURE 0x6ffffff6
#define SHT_SUNW_ANNOTATE 0x6ffffff7
#define SHT_SUNW_DEBUGSTR 0x6ffffff8
#define SHT_SUNW_DEBUG 0x6ffffff9
#define SHT_SUNW_move 0x6ffffffa
#define SHT_SUNW_COMDAT 0x6ffffffb
#define SHT_SUNW_syminfo 0x6ffffffc
#define SHT_SUNW_verdef 0x6ffffffd
#define SHT_GNU_verdef 0x6ffffffd /* Symbol versions provided */
#define SHT_SUNW_verneed 0x6ffffffe
#define SHT_GNU_verneed 0x6ffffffe /* Symbol versions required */
#define SHT_SUNW_versym 0x6fffffff
#define SHT_GNU_versym 0x6fffffff /* Symbol version table */
#define SHT_HISUNW 0x6fffffff
#define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */
#define SHT_LOPROC 0x70000000 /* reserved range for processor */
#define SHT_AMD64_UNWIND 0x70000001 /* unwind information */
#define SHT_HIPROC 0x7fffffff /* specific section header types */
#define SHT_LOUSER 0x80000000 /* reserved range for application */
#define SHT_HIUSER 0xffffffff /* specific indexes */
/* Flags for sh_flags. */
#define SHF_WRITE 0x1 /* Section contains writable data. */
#define SHF_ALLOC 0x2 /* Section occupies memory. */
#define SHF_EXECINSTR 0x4 /* Section contains instructions. */
#define SHF_MERGE 0x10 /* Section may be merged. */
#define SHF_STRINGS 0x20 /* Section contains strings. */
#define SHF_INFO_LINK 0x40 /* sh_info holds section index. */
#define SHF_LINK_ORDER 0x80 /* Special ordering requirements. */
#define SHF_OS_NONCONFORMING 0x100 /* OS-specific processing required. */
#define SHF_GROUP 0x200 /* Member of section group. */
#define SHF_TLS 0x400 /* Section contains TLS data. */
#define SHF_MASKOS 0x0ff00000 /* OS-specific semantics. */
#define SHF_MASKPROC 0xf0000000 /* Processor-specific semantics. */
/* Values for p_type. */
#define PT_NULL 0 /* Unused entry. */
#define PT_LOAD 1 /* Loadable segment. */
#define PT_DYNAMIC 2 /* Dynamic linking information segment. */
#define PT_INTERP 3 /* Pathname of interpreter. */
#define PT_NOTE 4 /* Auxiliary information. */
#define PT_SHLIB 5 /* Reserved (not used). */
#define PT_PHDR 6 /* Location of program header itself. */
#define PT_TLS 7 /* Thread local storage segment */
#define PT_LOOS 0x60000000 /* First OS-specific. */
#define PT_SUNW_UNWIND 0x6464e550 /* amd64 UNWIND program header */
#define PT_GNU_EH_FRAME 0x6474e550
#define PT_LOSUNW 0x6ffffffa
#define PT_SUNWBSS 0x6ffffffa /* Sun Specific segment */
#define PT_SUNWSTACK 0x6ffffffb /* describes the stack segment */
#define PT_SUNWDTRACE 0x6ffffffc /* private */
#define PT_SUNWCAP 0x6ffffffd /* hard/soft capabilities segment */
#define PT_HISUNW 0x6fffffff
#define PT_HIOS 0x6fffffff /* Last OS-specific. */
#define PT_LOPROC 0x70000000 /* First processor-specific type. */
#define PT_HIPROC 0x7fffffff /* Last processor-specific type. */
/* Values for p_flags. */
#define PF_X 0x1 /* Executable. */
#define PF_W 0x2 /* Writable. */
#define PF_R 0x4 /* Readable. */
#define PF_MASKOS 0x0ff00000 /* Operating system-specific. */
#define PF_MASKPROC 0xf0000000 /* Processor-specific. */
/* Extended program header index. */
#define PN_XNUM 0xffff
/* Values for d_tag. */
#define DT_NULL 0 /* Terminating entry. */
#define DT_NEEDED 1 /* String table offset of a needed shared
library. */
#define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */
#define DT_PLTGOT 3 /* Processor-dependent address. */
#define DT_HASH 4 /* Address of symbol hash table. */
#define DT_STRTAB 5 /* Address of string table. */
#define DT_SYMTAB 6 /* Address of symbol table. */
#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */
#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */
#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */
#define DT_STRSZ 10 /* Size of string table. */
#define DT_SYMENT 11 /* Size of each symbol table entry. */
#define DT_INIT 12 /* Address of initialization function. */
#define DT_FINI 13 /* Address of finalization function. */
#define DT_SONAME 14 /* String table offset of shared object
name. */
#define DT_RPATH 15 /* String table offset of library path. [sup] */
#define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. [sup] */
#define DT_REL 17 /* Address of ElfNN_Rel relocations. */
#define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */
#define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */
#define DT_PLTREL 20 /* Type of relocation used for PLT. */
#define DT_DEBUG 21 /* Reserved (not used). */
#define DT_TEXTREL 22 /* Indicates there may be relocations in
non-writable segments. [sup] */
#define DT_JMPREL 23 /* Address of PLT relocations. */
#define DT_BIND_NOW 24 /* [sup] */
#define DT_INIT_ARRAY 25 /* Address of the array of pointers to
initialization functions */
#define DT_FINI_ARRAY 26 /* Address of the array of pointers to
termination functions */
#define DT_INIT_ARRAYSZ 27 /* Size in bytes of the array of
initialization functions. */
#define DT_FINI_ARRAYSZ 28 /* Size in bytes of the array of
terminationfunctions. */
#define DT_RUNPATH 29 /* String table offset of a null-terminated
library search path string. */
#define DT_FLAGS 30 /* Object specific flag values. */
#define DT_ENCODING 32 /* Values greater than or equal to DT_ENCODING
and less than DT_LOOS follow the rules for
the interpretation of the d_un union
as follows: even == 'd_ptr', even == 'd_val'
or none */
#define DT_PREINIT_ARRAY 32 /* Address of the array of pointers to
pre-initialization functions. */
#define DT_PREINIT_ARRAYSZ 33 /* Size in bytes of the array of
pre-initialization functions. */
#define DT_MAXPOSTAGS 34 /* number of positive tags */
#define DT_LOOS 0x6000000d /* First OS-specific */
#define DT_SUNW_AUXILIARY 0x6000000d /* symbol auxiliary name */
#define DT_SUNW_RTLDINF 0x6000000e /* ld.so.1 info (private) */
#define DT_SUNW_FILTER 0x6000000f /* symbol filter name */
#define DT_SUNW_CAP 0x60000010 /* hardware/software */
#define DT_HIOS 0x6ffff000 /* Last OS-specific */
/*
* DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the
* Dyn.d_un.d_val field of the Elf*_Dyn structure.
*/
#define DT_VALRNGLO 0x6ffffd00
#define DT_CHECKSUM 0x6ffffdf8 /* elf checksum */
#define DT_PLTPADSZ 0x6ffffdf9 /* pltpadding size */
#define DT_MOVEENT 0x6ffffdfa /* move table entry size */
#define DT_MOVESZ 0x6ffffdfb /* move table size */
#define DT_FEATURE_1 0x6ffffdfc /* feature holder */
#define DT_POSFLAG_1 0x6ffffdfd /* flags for DT_* entries, effecting */
/* the following DT_* entry. */
/* See DF_P1_* definitions */
#define DT_SYMINSZ 0x6ffffdfe /* syminfo table size (in bytes) */
#define DT_SYMINENT 0x6ffffdff /* syminfo entry size (in bytes) */
#define DT_VALRNGHI 0x6ffffdff
/*
* DT_* entries which fall between DT_ADDRRNGHI & DT_ADDRRNGLO use the
* Dyn.d_un.d_ptr field of the Elf*_Dyn structure.
*
* If any adjustment is made to the ELF object after it has been
* built, these entries will need to be adjusted.
*/
#define DT_ADDRRNGLO 0x6ffffe00
#define DT_CONFIG 0x6ffffefa /* configuration information */
#define DT_DEPAUDIT 0x6ffffefb /* dependency auditing */
#define DT_AUDIT 0x6ffffefc /* object auditing */
#define DT_PLTPAD 0x6ffffefd /* pltpadding (sparcv9) */
#define DT_MOVETAB 0x6ffffefe /* move table */
#define DT_SYMINFO 0x6ffffeff /* syminfo table */
#define DT_ADDRRNGHI 0x6ffffeff
#define DT_VERSYM 0x6ffffff0 /* Address of versym section. */
#define DT_RELACOUNT 0x6ffffff9 /* number of RELATIVE relocations */
#define DT_RELCOUNT 0x6ffffffa /* number of RELATIVE relocations */
#define DT_FLAGS_1 0x6ffffffb /* state flags - see DF_1_* defs */
#define DT_VERDEF 0x6ffffffc /* Address of verdef section. */
#define DT_VERDEFNUM 0x6ffffffd /* Number of elems in verdef section */
#define DT_VERNEED 0x6ffffffe /* Address of verneed section. */
#define DT_VERNEEDNUM 0x6fffffff /* Number of elems in verneed section */
#define DT_LOPROC 0x70000000 /* First processor-specific type. */
#define DT_DEPRECATED_SPARC_REGISTER 0x7000001
#define DT_AUXILIARY 0x7ffffffd /* shared library auxiliary name */
#define DT_USED 0x7ffffffe /* ignored - same as needed */
#define DT_FILTER 0x7fffffff /* shared library filter name */
#define DT_HIPROC 0x7fffffff /* Last processor-specific type. */
/* Values for DT_FLAGS */
#define DF_ORIGIN 0x0001 /* Indicates that the object being loaded may
make reference to the $ORIGIN substitution
string */
#define DF_SYMBOLIC 0x0002 /* Indicates "symbolic" linking. */
#define DF_TEXTREL 0x0004 /* Indicates there may be relocations in
non-writable segments. */
#define DF_BIND_NOW 0x0008 /* Indicates that the dynamic linker should
process all relocations for the object
containing this entry before transferring
control to the program. */
#define DF_STATIC_TLS 0x0010 /* Indicates that the shared object or
executable contains code using a static
thread-local storage scheme. */
/* Values for n_type. Used in core files. */
#define NT_PRSTATUS 1 /* Process status. */
#define NT_FPREGSET 2 /* Floating point registers. */
#define NT_PRPSINFO 3 /* Process state info. */
/* Symbol Binding - ELFNN_ST_BIND - st_info */
#define STB_LOCAL 0 /* Local symbol */
#define STB_GLOBAL 1 /* Global symbol */
#define STB_WEAK 2 /* like global - lower precedence */
#define STB_LOOS 10 /* Reserved range for operating system */
#define STB_HIOS 12 /* specific semantics. */
#define STB_LOPROC 13 /* reserved range for processor */
#define STB_HIPROC 15 /* specific semantics. */
/* Symbol type - ELFNN_ST_TYPE - st_info */
#define STT_NOTYPE 0 /* Unspecified type. */
#define STT_OBJECT 1 /* Data object. */
#define STT_FUNC 2 /* Function. */
#define STT_SECTION 3 /* Section. */
#define STT_FILE 4 /* Source file. */
#define STT_COMMON 5 /* Uninitialized common block. */
#define STT_TLS 6 /* TLS object. */
#define STT_NUM 7
#define STT_LOOS 10 /* Reserved range for operating system */
#define STT_HIOS 12 /* specific semantics. */
#define STT_LOPROC 13 /* reserved range for processor */
#define STT_HIPROC 15 /* specific semantics. */
/* Symbol visibility - ELFNN_ST_VISIBILITY - st_other */
#define STV_DEFAULT 0x0 /* Default visibility (see binding). */
#define STV_INTERNAL 0x1 /* Special meaning in relocatable objects. */
#define STV_HIDDEN 0x2 /* Not visible. */
#define STV_PROTECTED 0x3 /* Visible but not preemptible. */
/* Special symbol table indexes. */
#define STN_UNDEF 0 /* Undefined symbol index. */
/* Symbol versioning flags. */
#define VER_DEF_CURRENT 1
#define VER_DEF_IDX(x) VER_NDX(x)
#define VER_FLG_BASE 0x01
#define VER_FLG_WEAK 0x02
#define VER_NEED_CURRENT 1
#define VER_NEED_WEAK (1u << 15)
#define VER_NEED_HIDDEN VER_NDX_HIDDEN
#define VER_NEED_IDX(x) VER_NDX(x)
#define VER_NDX_LOCAL 0
#define VER_NDX_GLOBAL 1
#define VER_NDX_GIVEN 2
#define VER_NDX_HIDDEN (1u << 15)
#define VER_NDX(x) ((x) & ~(1u << 15))
#define CA_SUNW_NULL 0
#define CA_SUNW_HW_1 1 /* first hardware capabilities entry */
#define CA_SUNW_SF_1 2 /* first software capabilities entry */
/*
* Syminfo flag values
*/
#define SYMINFO_FLG_DIRECT 0x0001 /* symbol ref has direct association */
/* to object containing defn. */
#define SYMINFO_FLG_PASSTHRU 0x0002 /* ignored - see SYMINFO_FLG_FILTER */
#define SYMINFO_FLG_COPY 0x0004 /* symbol is a copy-reloc */
#define SYMINFO_FLG_LAZYLOAD 0x0008 /* object containing defn should be */
/* lazily-loaded */
#define SYMINFO_FLG_DIRECTBIND 0x0010 /* ref should be bound directly to */
/* object containing defn. */
#define SYMINFO_FLG_NOEXTDIRECT 0x0020 /* don't let an external reference */
/* directly bind to this symbol */
#define SYMINFO_FLG_FILTER 0x0002 /* symbol ref is associated to a */
#define SYMINFO_FLG_AUXILIARY 0x0040 /* standard or auxiliary filter */
/*
* Syminfo.si_boundto values.
*/
#define SYMINFO_BT_SELF 0xffff /* symbol bound to self */
#define SYMINFO_BT_PARENT 0xfffe /* symbol bound to parent */
#define SYMINFO_BT_NONE 0xfffd /* no special symbol binding */
#define SYMINFO_BT_EXTERN 0xfffc /* symbol defined as external */
#define SYMINFO_BT_LOWRESERVE 0xff00 /* beginning of reserved entries */
/*
* Syminfo version values.
*/
#define SYMINFO_NONE 0 /* Syminfo version */
#define SYMINFO_CURRENT 1
#define SYMINFO_NUM 2
/*
* Relocation types.
*
* All machine architectures are defined here to allow tools on one to
* handle others.
*/
#define R_386_NONE 0 /* No relocation. */
#define R_386_32 1 /* Add symbol value. */
#define R_386_PC32 2 /* Add PC-relative symbol value. */
#define R_386_GOT32 3 /* Add PC-relative GOT offset. */
#define R_386_PLT32 4 /* Add PC-relative PLT offset. */
#define R_386_COPY 5 /* Copy data from shared object. */
#define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */
#define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */
#define R_386_RELATIVE 8 /* Add load address of shared object. */
#define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */
#define R_386_GOTPC 10 /* Add PC-relative GOT table address. */
#define R_386_TLS_TPOFF 14 /* Negative offset in static TLS block */
#define R_386_TLS_IE 15 /* Absolute address of GOT for -ve static TLS */
#define R_386_TLS_GOTIE 16 /* GOT entry for negative static TLS block */
#define R_386_TLS_LE 17 /* Negative offset relative to static TLS */
#define R_386_TLS_GD 18 /* 32 bit offset to GOT (index,off) pair */
#define R_386_TLS_LDM 19 /* 32 bit offset to GOT (index,zero) pair */
#define R_386_TLS_GD_32 24 /* 32 bit offset to GOT (index,off) pair */
#define R_386_TLS_GD_PUSH 25 /* pushl instruction for Sun ABI GD sequence */
#define R_386_TLS_GD_CALL 26 /* call instruction for Sun ABI GD sequence */
#define R_386_TLS_GD_POP 27 /* popl instruction for Sun ABI GD sequence */
#define R_386_TLS_LDM_32 28 /* 32 bit offset to GOT (index,zero) pair */
#define R_386_TLS_LDM_PUSH 29 /* pushl instruction for Sun ABI LD sequence */
#define R_386_TLS_LDM_CALL 30 /* call instruction for Sun ABI LD sequence */
#define R_386_TLS_LDM_POP 31 /* popl instruction for Sun ABI LD sequence */
#define R_386_TLS_LDO_32 32 /* 32 bit offset from start of TLS block */
#define R_386_TLS_IE_32 33 /* 32 bit offset to GOT static TLS offset entry */
#define R_386_TLS_LE_32 34 /* 32 bit offset within static TLS block */
#define R_386_TLS_DTPMOD32 35 /* GOT entry containing TLS index */
#define R_386_TLS_DTPOFF32 36 /* GOT entry containing TLS offset */
#define R_386_TLS_TPOFF32 37 /* GOT entry of -ve static TLS offset */
/* Null relocation */
#define R_AARCH64_NONE 256 /* No relocation */
/* Static AArch64 relocations */
/* Static data relocations */
#define R_AARCH64_ABS64 257 /* S + A */
#define R_AARCH64_ABS32 258 /* S + A */
#define R_AARCH64_ABS16 259 /* S + A */
#define R_AARCH64_PREL64 260 /* S + A - P */
#define R_AARCH64_PREL32 261 /* S + A - P */
#define R_AARCH64_PREL16 262 /* S + A - P */
/* Group relocations to create a 16, 32, 48, or 64 bit unsigned data value or address inline */
#define R_AARCH64_MOVW_UABS_G0 263 /* S + A */
#define R_AARCH64_MOVW_UABS_G0_NC 264 /* S + A */
#define R_AARCH64_MOVW_UABS_G1 265 /* S + A */
#define R_AARCH64_MOVW_UABS_G1_NC 266 /* S + A */
#define R_AARCH64_MOVW_UABS_G2 267 /* S + A */
#define R_AARCH64_MOVW_UABS_G2_NC 268 /* S + A */
#define R_AARCH64_MOVW_UABS_G3 269 /* S + A */
/* Group relocations to create a 16, 32, 48, or 64 bit signed data or offset value inline */
#define R_AARCH64_MOVW_SABS_G0 270 /* S + A */
#define R_AARCH64_MOVW_SABS_G1 271 /* S + A */
#define R_AARCH64_MOVW_SABS_G2 272 /* S + A */
/* Relocations to generate 19, 21 and 33 bit PC-relative addresses */
#define R_AARCH64_LD_PREL_LO19 273 /* S + A - P */
#define R_AARCH64_ADR_PREL_LO21 274 /* S + A - P */
#define R_AARCH64_ADR_PREL_PG_HI21 275 /* Page(S+A) - Page(P) */
#define R_AARCH64_ADR_PREL_PG_HI21_NC 276 /* Page(S+A) - Page(P) */
#define R_AARCH64_ADD_ABS_LO12_NC 277 /* S + A */
#define R_AARCH64_LDST8_ABS_LO12_NC 278 /* S + A */
#define R_AARCH64_LDST16_ABS_LO12_NC 284 /* S + A */
#define R_AARCH64_LDST32_ABS_LO12_NC 285 /* S + A */
#define R_AARCH64_LDST64_ABS_LO12_NC 286 /* S + A */
#define R_AARCH64_LDST128_ABS_LO12_NC 299 /* S + A */
/* Relocations for control-flow instructions - all offsets are a multiple of 4 */
#define R_AARCH64_TSTBR14 279 /* S+A-P */
#define R_AARCH64_CONDBR19 280 /* S+A-P */
#define R_AARCH64_JUMP26 282 /* S+A-P */
#define R_AARCH64_CALL26 283 /* S+A-P */
/* Group relocations to create a 16, 32, 48, or 64 bit PC-relative offset inline */
#define R_AARCH64_MOVW_PREL_G0 287 /* S+A-P */
#define R_AARCH64_MOVW_PREL_G0_NC 288 /* S+A-P */
#define R_AARCH64_MOVW_PREL_G1 289 /* S+A-P */
#define R_AARCH64_MOVW_PREL_G1_NC 290 /* S+A-P */
#define R_AARCH64_MOVW_PREL_G2 291 /* S+A-P */
#define R_AARCH64_MOVW_PREL_G2_NC 292 /* S+A-P */
#define R_AARCH64_MOVW_PREL_G3 293 /* S+A-P */
/* Group relocations to create a 16, 32, 48, or 64 bit GOT-relative offsets inline */
#define R_AARCH64_MOVW_GOTOFF_G0 300 /* G(S)-GOT */
#define R_AARCH64_MOVW_GOTOFF_G0_NC 301 /* G(S)-GOT */
#define R_AARCH64_MOVW_GOTOFF_G1 302 /* G(S)-GOT */
#define R_AARCH64_MOVW_GOTOFF_G1_NC 303 /* G(S)-GOT */
#define R_AARCH64_MOVW_GOTOFF_G2 304 /* G(S)-GOT */
#define R_AARCH64_MOVW_GOTOFF_G2_NC 305 /* G(S)-GOT */
#define R_AARCH64_MOVW_GOTOFF_G3 306 /* G(S)-GOT */
/* GOT-relative data relocations */
#define R_AARCH64_GOTREL64 307 /* S+A-GOT */
#define R_AARCH64_GOTREL32 308 /* S+A-GOT */
/* GOT-relative instruction relocations */
#define R_AARCH64_GOT_LD_PREL19 309 /* G(S)-P */
#define R_AARCH64_LD64_GOTOFF_LO15 310 /* G(S)-GOT */
#define R_AARCH64_ADR_GOT_PAGE 311 /* Page(G(S))-Page(P) */
#define R_AARCH64_LD64_GOT_LO12_NC 312 /* G(S) */
#define R_AARCH64_LD64_GOTPAGE_LO15 313 /* G(S)-Page(GOT) */
/* Relocations for thread-local storage */
/* General Dynamic TLS relocations */
#define R_AARCH64_TLSGD_ADR_PREL21 512 /* G(TLSIDX(S+A)) - P */
#define R_AARCH64_TLSGD_ADR_PAGE21 513 /* Page(G(TLSIDX(S+A))) - Page(P) */
#define R_AARCH64_TLSGD_ADD_LO12_NC 514 /* G(TLSIDX(S+A)) */
#define R_AARCH64_TLSGD_MOVW_G1 515 /* G(TLSIDX(S+A)) - GOT */
#define R_AARCH64_TLSGD_MOVW_G0_NC 516 /* G(TLSIDX(S+A)) - GOT */
/* Local Dynamic TLS relocations */
#define R_AARCH64_TLSLD_ADR_PREL21 517 /* G(LDM(S))) - P */
#define R_AARCH64_TLSLD_ADR_PAGE21 518 /* Page(G(LDM(S)))-Page(P) */
#define R_AARCH64_TLSLD_ADD_LO12_NC 519 /* G(LDM(S)) */
#define R_AARCH64_TLSLD_MOVW_G1 520 /* G(LDM(S)) - GOT */
#define R_AARCH64_TLSLD_MOVW_G0_NC 521 /* G(LDM(S)) - GOT */
#define R_AARCH64_TLSLD_LD_PREL19 522 /* G(LDM(S)) - P */
#define R_AARCH64_TLSLD_MOVW_DTPREL_G2 523 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_MOVW_DTPREL_G1 524 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC 525 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_MOVW_DTPREL_G0 526 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC 527 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_ADD_DTPREL_HI12 528 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_ADD_DTPREL_LO12 529 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC 530 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_LDST8_DTPREL_LO12 531 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC 532 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_LDST16_DTPREL_LO12 533 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC 534 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_LDST32_DTPREL_LO12 535 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC 536 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_LDST64_DTPREL_LO12 537 /* DTPREL(S+A) */
#define R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC 538 /* DTPREL(S+A) */
/* Initial Exec TLS relocations */
#define R_AARCH64_TLSIE_MOVW_GOTTPREL_G1 539 /* G(TPREL(S+A)) - GOT */
#define R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC 540 /* G(TPREL(S+A)) - GOT */
#define R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 541 /* Page(G(TPREL(S+A))) - Page(P) */
#define R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC 542 /* G(TPREL(S+A)) */
#define R_AARCH64_TLSIE_LD_GOTTPREL_PREL19 543 /* G(TPREL(S+A)) - P */
/* Local Exec TLS relocations */
#define R_AARCH64_TLSLE_MOVW_TPREL_G2 544 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_MOVW_TPREL_G1 545 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_MOVW_TPREL_G1_NC 546 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_MOVW_TPREL_G0 547 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_MOVW_TPREL_G0_NC 548 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_ADD_TPREL_HI12 549 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_ADD_TPREL_LO12 550 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_ADD_TPREL_LO12_NC 551 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_LDST8_TPREL_LO12 552 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC 553 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_LDST16_TPREL_LO12 554 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC 555 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_LDST32_TPREL_LO12 556 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC 557 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_LDST64_TPREL_LO12 558 /* TPREL(S+A) */
#define R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC 559 /* TPREL(S+A) */
/* Dynamic relocations */
/* Dynamic relocations */
#define R_AARCH64_COPY 1024
#define R_AARCH64_GLOB_DAT 1025 /* S + A */
#define R_AARCH64_JUMP_SLOT 1026 /* S + A */
#define R_AARCH64_RELATIVE 1027 /* Delta(S) + A , Delta(P) + A */
#define R_AARCH64_TLS_DTPREL64 1028 /* DTPREL(S+A) */
#define R_AARCH64_TLS_DTPMOD64 1029 /* LDM(S) */
#define R_AARCH64_TLS_TPREL64 1030 /* TPREL(S+A) */
#define R_AARCH64_TLS_DTPREL32 1031 /* DTPREL(S+A) */
#define R_AARCH64_TLS_DTPMOD32 1032 /* LDM(S) */
#define R_AARCH64_TLS_TPREL32 1033 /* DTPREL(S+A) */
#define R_ALPHA_NONE 0 /* No reloc */
#define R_ALPHA_REFLONG 1 /* Direct 32 bit */
#define R_ALPHA_REFQUAD 2 /* Direct 64 bit */
#define R_ALPHA_GPREL32 3 /* GP relative 32 bit */
#define R_ALPHA_LITERAL 4 /* GP relative 16 bit w/optimization */
#define R_ALPHA_LITUSE 5 /* Optimization hint for LITERAL */
#define R_ALPHA_GPDISP 6 /* Add displacement to GP */
#define R_ALPHA_BRADDR 7 /* PC+4 relative 23 bit shifted */
#define R_ALPHA_HINT 8 /* PC+4 relative 16 bit shifted */
#define R_ALPHA_SREL16 9 /* PC relative 16 bit */
#define R_ALPHA_SREL32 10 /* PC relative 32 bit */
#define R_ALPHA_SREL64 11 /* PC relative 64 bit */
#define R_ALPHA_OP_PUSH 12 /* OP stack push */
#define R_ALPHA_OP_STORE 13 /* OP stack pop and store */
#define R_ALPHA_OP_PSUB 14 /* OP stack subtract */
#define R_ALPHA_OP_PRSHIFT 15 /* OP stack right shift */
#define R_ALPHA_GPVALUE 16
#define R_ALPHA_GPRELHIGH 17
#define R_ALPHA_GPRELLOW 18
#define R_ALPHA_IMMED_GP_16 19
#define R_ALPHA_IMMED_GP_HI32 20
#define R_ALPHA_IMMED_SCN_HI32 21
#define R_ALPHA_IMMED_BR_HI32 22
#define R_ALPHA_IMMED_LO32 23
#define R_ALPHA_COPY 24 /* Copy symbol at runtime */
#define R_ALPHA_GLOB_DAT 25 /* Create GOT entry */
#define R_ALPHA_JMP_SLOT 26 /* Create PLT entry */
#define R_ALPHA_RELATIVE 27 /* Adjust by program base */
#define R_ARM_NONE 0 /* No relocation. */
#define R_ARM_PC24 1
#define R_ARM_ABS32 2
#define R_ARM_REL32 3
#define R_ARM_PC13 4
#define R_ARM_ABS16 5
#define R_ARM_ABS12 6
#define R_ARM_THM_ABS5 7
#define R_ARM_ABS8 8
#define R_ARM_SBREL32 9
#define R_ARM_THM_PC22 10
#define R_ARM_THM_PC8 11
#define R_ARM_AMP_VCALL9 12
#define R_ARM_SWI24 13
#define R_ARM_THM_SWI8 14
#define R_ARM_XPC25 15
#define R_ARM_THM_XPC22 16
#define R_ARM_COPY 20 /* Copy data from shared object. */
#define R_ARM_GLOB_DAT 21 /* Set GOT entry to data address. */
#define R_ARM_JUMP_SLOT 22 /* Set GOT entry to code address. */
#define R_ARM_RELATIVE 23 /* Add load address of shared object. */
#define R_ARM_GOTOFF 24 /* Add GOT-relative symbol address. */
#define R_ARM_GOTPC 25 /* Add PC-relative GOT table address. */
#define R_ARM_GOT32 26 /* Add PC-relative GOT offset. */
#define R_ARM_PLT32 27 /* Add PC-relative PLT offset. */
#define R_ARM_CALL 28
#define R_ARM_JMP24 29
#define R_ARM_THM_MOVW_ABS_NC 47
#define R_ARM_THM_MOVT_ABS 48
// Block of PC-relative relocations added to work around gcc putting
// object relocations in static executables.
#define R_ARM_THM_JUMP24 30
#define R_ARM_PREL31 42
#define R_ARM_MOVW_PREL_NC 45
#define R_ARM_MOVT_PREL 46
#define R_ARM_THM_MOVW_PREL_NC 49
#define R_ARM_THM_MOVT_PREL 50
#define R_ARM_THM_JMP6 52
#define R_ARM_THM_ALU_PREL_11_0 53
#define R_ARM_THM_PC12 54
#define R_ARM_REL32_NOI 56
#define R_ARM_ALU_PC_G0_NC 57
#define R_ARM_ALU_PC_G0 58
#define R_ARM_ALU_PC_G1_NC 59
#define R_ARM_ALU_PC_G1 60
#define R_ARM_ALU_PC_G2 61
#define R_ARM_LDR_PC_G1 62
#define R_ARM_LDR_PC_G2 63
#define R_ARM_LDRS_PC_G0 64
#define R_ARM_LDRS_PC_G1 65
#define R_ARM_LDRS_PC_G2 66
#define R_ARM_LDC_PC_G0 67
#define R_ARM_LDC_PC_G1 68
#define R_ARM_LDC_PC_G2 69
#define R_ARM_GOT_PREL 96
#define R_ARM_THM_JUMP11 102
#define R_ARM_THM_JUMP8 103
#define R_ARM_TLS_GD32 104
#define R_ARM_TLS_LDM32 105
#define R_ARM_TLS_IE32 107
#define R_ARM_THM_JUMP19 51
#define R_ARM_GNU_VTENTRY 100
#define R_ARM_GNU_VTINHERIT 101
#define R_ARM_RSBREL32 250
#define R_ARM_THM_RPC22 251
#define R_ARM_RREL32 252
#define R_ARM_RABS32 253
#define R_ARM_RPC24 254
#define R_ARM_RBASE 255
#define R_PPC_NONE 0 /* No relocation. */
#define R_PPC_ADDR32 1
#define R_PPC_ADDR24 2
#define R_PPC_ADDR16 3
#define R_PPC_ADDR16_LO 4
#define R_PPC_ADDR16_HI 5
#define R_PPC_ADDR16_HA 6
#define R_PPC_ADDR14 7
#define R_PPC_ADDR14_BRTAKEN 8
#define R_PPC_ADDR14_BRNTAKEN 9
#define R_PPC_REL24 10
#define R_PPC_REL14 11
#define R_PPC_REL14_BRTAKEN 12
#define R_PPC_REL14_BRNTAKEN 13
#define R_PPC_GOT16 14
#define R_PPC_GOT16_LO 15
#define R_PPC_GOT16_HI 16
#define R_PPC_GOT16_HA 17
#define R_PPC_PLTREL24 18
#define R_PPC_COPY 19
#define R_PPC_GLOB_DAT 20
#define R_PPC_JMP_SLOT 21
#define R_PPC_RELATIVE 22
#define R_PPC_LOCAL24PC 23
#define R_PPC_UADDR32 24
#define R_PPC_UADDR16 25
#define R_PPC_REL32 26
#define R_PPC_PLT32 27
#define R_PPC_PLTREL32 28
#define R_PPC_PLT16_LO 29
#define R_PPC_PLT16_HI 30
#define R_PPC_PLT16_HA 31
#define R_PPC_SDAREL16 32
#define R_PPC_SECTOFF 33
#define R_PPC_SECTOFF_LO 34
#define R_PPC_SECTOFF_HI 35
#define R_PPC_SECTOFF_HA 36
/*
* TLS relocations
*/
#define R_PPC_TLS 67
#define R_PPC_DTPMOD32 68
#define R_PPC_TPREL16 69
#define R_PPC_TPREL16_LO 70
#define R_PPC_TPREL16_HI 71
#define R_PPC_TPREL16_HA 72
#define R_PPC_TPREL32 73
#define R_PPC_DTPREL16 74
#define R_PPC_DTPREL16_LO 75
#define R_PPC_DTPREL16_HI 76
#define R_PPC_DTPREL16_HA 77
#define R_PPC_DTPREL32 78
#define R_PPC_GOT_TLSGD16 79
#define R_PPC_GOT_TLSGD16_LO 80
#define R_PPC_GOT_TLSGD16_HI 81
#define R_PPC_GOT_TLSGD16_HA 82
#define R_PPC_GOT_TLSLD16 83
#define R_PPC_GOT_TLSLD16_LO 84
#define R_PPC_GOT_TLSLD16_HI 85
#define R_PPC_GOT_TLSLD16_HA 86
#define R_PPC_GOT_TPREL16 87
#define R_PPC_GOT_TPREL16_LO 88
#define R_PPC_GOT_TPREL16_HI 89
#define R_PPC_GOT_TPREL16_HA 90
/*
* The remaining relocs are from the Embedded ELF ABI, and are not in the
* SVR4 ELF ABI.
*/
#define R_PPC_EMB_NADDR32 101
#define R_PPC_EMB_NADDR16 102
#define R_PPC_EMB_NADDR16_LO 103
#define R_PPC_EMB_NADDR16_HI 104
#define R_PPC_EMB_NADDR16_HA 105
#define R_PPC_EMB_SDAI16 106
#define R_PPC_EMB_SDA2I16 107
#define R_PPC_EMB_SDA2REL 108
#define R_PPC_EMB_SDA21 109
#define R_PPC_EMB_MRKREF 110
#define R_PPC_EMB_RELSEC16 111
#define R_PPC_EMB_RELST_LO 112
#define R_PPC_EMB_RELST_HI 113
#define R_PPC_EMB_RELST_HA 114
#define R_PPC_EMB_BIT_FLD 115
#define R_PPC_EMB_RELSDA 116
#define R_SPARC_NONE 0
#define R_SPARC_8 1
#define R_SPARC_16 2
#define R_SPARC_32 3
#define R_SPARC_DISP8 4
#define R_SPARC_DISP16 5
#define R_SPARC_DISP32 6
#define R_SPARC_WDISP30 7
#define R_SPARC_WDISP22 8
#define R_SPARC_HI22 9
#define R_SPARC_22 10
#define R_SPARC_13 11
#define R_SPARC_LO10 12
#define R_SPARC_GOT10 13
#define R_SPARC_GOT13 14
#define R_SPARC_GOT22 15
#define R_SPARC_PC10 16
#define R_SPARC_PC22 17
#define R_SPARC_WPLT30 18
#define R_SPARC_COPY 19
#define R_SPARC_GLOB_DAT 20
#define R_SPARC_JMP_SLOT 21
#define R_SPARC_RELATIVE 22
#define R_SPARC_UA32 23
#define R_SPARC_PLT32 24
#define R_SPARC_HIPLT22 25
#define R_SPARC_LOPLT10 26
#define R_SPARC_PCPLT32 27
#define R_SPARC_PCPLT22 28
#define R_SPARC_PCPLT10 29
#define R_SPARC_10 30
#define R_SPARC_11 31
#define R_SPARC_64 32
#define R_SPARC_OLO10 33
#define R_SPARC_HH22 34
#define R_SPARC_HM10 35
#define R_SPARC_LM22 36
#define R_SPARC_PC_HH22 37
#define R_SPARC_PC_HM10 38
#define R_SPARC_PC_LM22 39
#define R_SPARC_WDISP16 40
#define R_SPARC_WDISP19 41
#define R_SPARC_GLOB_JMP 42
#define R_SPARC_7 43
#define R_SPARC_5 44
#define R_SPARC_6 45
#define R_SPARC_DISP64 46
#define R_SPARC_PLT64 47
#define R_SPARC_HIX22 48
#define R_SPARC_LOX10 49
#define R_SPARC_H44 50
#define R_SPARC_M44 51
#define R_SPARC_L44 52
#define R_SPARC_REGISTER 53
#define R_SPARC_UA64 54
#define R_SPARC_UA16 55
#define R_SPARC_TLS_GD_HI22 56
#define R_SPARC_TLS_GD_LO10 57
#define R_SPARC_TLS_GD_ADD 58
#define R_SPARC_TLS_GD_CALL 59
#define R_SPARC_TLS_LDM_HI22 60
#define R_SPARC_TLS_LDM_LO10 61
#define R_SPARC_TLS_LDM_ADD 62
#define R_SPARC_TLS_LDM_CALL 63
#define R_SPARC_TLS_LDO_HIX22 64
#define R_SPARC_TLS_LDO_LOX10 65
#define R_SPARC_TLS_LDO_ADD 66
#define R_SPARC_TLS_IE_HI22 67
#define R_SPARC_TLS_IE_LO10 68
#define R_SPARC_TLS_IE_LD 69
#define R_SPARC_TLS_IE_LDX 70
#define R_SPARC_TLS_IE_ADD 71
#define R_SPARC_TLS_LE_HIX22 72
#define R_SPARC_TLS_LE_LOX10 73
#define R_SPARC_TLS_DTPMOD32 74
#define R_SPARC_TLS_DTPMOD64 75
#define R_SPARC_TLS_DTPOFF32 76
#define R_SPARC_TLS_DTPOFF64 77
#define R_SPARC_TLS_TPOFF32 78
#define R_SPARC_TLS_TPOFF64 79
#define R_X86_64_NONE 0 /* No relocation. */
#define R_X86_64_64 1 /* Add 64 bit symbol value. */
#define R_X86_64_PC32 2 /* PC-relative 32 bit signed sym value. */
#define R_X86_64_GOT32 3 /* PC-relative 32 bit GOT offset. */
#define R_X86_64_PLT32 4 /* PC-relative 32 bit PLT offset. */
#define R_X86_64_COPY 5 /* Copy data from shared object. */
#define R_X86_64_GLOB_DAT 6 /* Set GOT entry to data address. */
#define R_X86_64_JMP_SLOT 7 /* Set GOT entry to code address. */
#define R_X86_64_RELATIVE 8 /* Add load address of shared object. */
#define R_X86_64_GOTPCREL 9 /* Add 32 bit signed pcrel offset to GOT. */
#define R_X86_64_32 10 /* Add 32 bit zero extended symbol value */
#define R_X86_64_32S 11 /* Add 32 bit sign extended symbol value */
#define R_X86_64_16 12 /* Add 16 bit zero extended symbol value */
#define R_X86_64_PC16 13 /* Add 16 bit signed extended pc relative symbol value */
#define R_X86_64_8 14 /* Add 8 bit zero extended symbol value */
#define R_X86_64_PC8 15 /* Add 8 bit signed extended pc relative symbol value */
#define R_X86_64_DTPMOD64 16 /* ID of module containing symbol */
#define R_X86_64_DTPOFF64 17 /* Offset in TLS block */
#define R_X86_64_TPOFF64 18 /* Offset in static TLS block */
#define R_X86_64_TLSGD 19 /* PC relative offset to GD GOT entry */
#define R_X86_64_TLSLD 20 /* PC relative offset to LD GOT entry */
#define R_X86_64_DTPOFF32 21 /* Offset in TLS block */
#define R_X86_64_GOTTPOFF 22 /* PC relative offset to IE GOT entry */
#define R_X86_64_TPOFF32 23 /* Offset in static TLS block */
#define R_X86_64_PC64 24 /* PC relative 64 bit */
#define R_X86_64_GOTOFF64 25 /* 64 bit offset to GOT */
#define R_X86_64_GOTPC3 26 /* 32 bit signed pc relative offset to GOT */
#define R_X86_64_GOT64 27 /* 64-bit GOT entry offset */
#define R_X86_64_GOTPCREL64 28 /* 64-bit PC relative offset to GOT entry */
#define R_X86_64_GOTPC64 29 /* 64-bit PC relative offset to GOT */
#define R_X86_64_GOTPLT64 30 /* like GOT64, says PLT entry needed */
#define R_X86_64_PLTOFF64 31 /* 64-bit GOT relative offset to PLT entry */
#define R_X86_64_SIZE32 32 /* Size of symbol plus 32-bit addend */
#define R_X86_64_SIZE64 33 /* Size of symbol plus 64-bit addend */
#define R_X86_64_GOTPC32_TLSDESC 34 /* GOT offset for TLS descriptor. */
#define R_X86_64_TLSDESC_CALL 35 /* Marker for call through TLS descriptor. */
#define R_X86_64_TLSDESC 36 /* TLS descriptor. */
#define R_X86_64_IRELATIVE 37 /* Adjust indirectly by program base */
#define R_X86_64_RELATIVE64 38 /* 64-bit adjust by program base */
#define R_X86_64_GOTPCRELX 41 /* Load from 32 bit signed pc relative offset to GOT entry without REX prefix, relaxable. */
#define R_X86_64_REX_GOTPCRELX 42 /* Load from 32 bit signed pc relative offset to GOT entry with REX prefix, relaxable. */
#endif /* !_SYS_ELF_COMMON_H_ */

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/** @file
ELF library
Copyright (c) 2019 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "ElfLibInternal.h"
/**
Check if the ELF image is valid.
@param[in] ImageBase Memory address of an image.
@retval TRUE if valid.
**/
BOOLEAN
IsElfFormat (
IN CONST UINT8 *ImageBase
)
{
Elf32_Ehdr *Elf32Hdr;
Elf64_Ehdr *Elf64Hdr;
ASSERT (ImageBase != NULL);
Elf32Hdr = (Elf32_Ehdr *)ImageBase;
//
// Start with correct signature "\7fELF"
//
if ((Elf32Hdr->e_ident[EI_MAG0] != ELFMAG0) ||
(Elf32Hdr->e_ident[EI_MAG1] != ELFMAG1) ||
(Elf32Hdr->e_ident[EI_MAG1] != ELFMAG1) ||
(Elf32Hdr->e_ident[EI_MAG2] != ELFMAG2)
) {
return FALSE;
}
//
// Support little-endian only
//
if (Elf32Hdr->e_ident[EI_DATA] != ELFDATA2LSB) {
return FALSE;
}
//
// Check 32/64-bit architecture
//
if (Elf32Hdr->e_ident[EI_CLASS] == ELFCLASS64) {
Elf64Hdr = (Elf64_Ehdr *)Elf32Hdr;
Elf32Hdr = NULL;
} else if (Elf32Hdr->e_ident[EI_CLASS] == ELFCLASS32) {
Elf64Hdr = NULL;
} else {
return FALSE;
}
if (Elf64Hdr != NULL) {
//
// Support intel architecture only for now
//
if (Elf64Hdr->e_machine != EM_X86_64) {
return FALSE;
}
//
// Support ELF types: EXEC (Executable file), DYN (Shared object file)
//
if ((Elf64Hdr->e_type != ET_EXEC) && (Elf64Hdr->e_type != ET_DYN)) {
return FALSE;
}
//
// Support current ELF version only
//
if (Elf64Hdr->e_version != EV_CURRENT) {
return FALSE;
}
} else {
//
// Support intel architecture only for now
//
if (Elf32Hdr->e_machine != EM_386) {
return FALSE;
}
//
// Support ELF types: EXEC (Executable file), DYN (Shared object file)
//
if ((Elf32Hdr->e_type != ET_EXEC) && (Elf32Hdr->e_type != ET_DYN)) {
return FALSE;
}
//
// Support current ELF version only
//
if (Elf32Hdr->e_version != EV_CURRENT) {
return FALSE;
}
}
return TRUE;
}
/**
Calculate a ELF file size.
@param[in] ElfCt ELF image context pointer.
@param[out] FileSize Return the file size.
@retval EFI_INVALID_PARAMETER ElfCt or SecPos is NULL.
@retval EFI_NOT_FOUND Could not find the section.
@retval EFI_SUCCESS Section posistion was filled successfully.
**/
EFI_STATUS
CalculateElfFileSize (
IN ELF_IMAGE_CONTEXT *ElfCt,
OUT UINTN *FileSize
)
{
EFI_STATUS Status;
UINTN FileSize1;
UINTN FileSize2;
Elf32_Ehdr *Elf32Hdr;
Elf64_Ehdr *Elf64Hdr;
UINTN Offset;
UINTN Size;
if ((ElfCt == NULL) || (FileSize == NULL)) {
return EFI_INVALID_PARAMETER;
}
// Use last section as end of file
Status = GetElfSectionPos (ElfCt, ElfCt->ShNum - 1, &Offset, &Size);
if (EFI_ERROR(Status)) {
return EFI_UNSUPPORTED;
}
FileSize1 = Offset + Size;
// Use end of section header as end of file
FileSize2 = 0;
if (ElfCt->EiClass == ELFCLASS32) {
Elf32Hdr = (Elf32_Ehdr *)ElfCt->FileBase;
FileSize2 = Elf32Hdr->e_shoff + Elf32Hdr->e_shentsize * Elf32Hdr->e_shnum;
} else if (ElfCt->EiClass == ELFCLASS64) {
Elf64Hdr = (Elf64_Ehdr *)ElfCt->FileBase;
FileSize2 = (UINTN)(Elf64Hdr->e_shoff + Elf64Hdr->e_shentsize * Elf64Hdr->e_shnum);
}
*FileSize = MAX(FileSize1, FileSize2);
return EFI_SUCCESS;
}
/**
Get a ELF program segment loading info.
@param[in] ImageBase Image base.
@param[in] EiClass ELF class.
@param[in] Index ELF segment index.
@param[out] SegInfo The pointer to the segment info.
@retval EFI_INVALID_PARAMETER ElfCt or SecPos is NULL.
@retval EFI_NOT_FOUND Could not find the section.
@retval EFI_SUCCESS Section posistion was filled successfully.
**/
EFI_STATUS
GetElfSegmentInfo (
IN UINT8 *ImageBase,
IN UINT32 EiClass,
IN UINT32 Index,
OUT SEGMENT_INFO *SegInfo
)
{
Elf32_Phdr *Elf32Phdr;
Elf64_Phdr *Elf64Phdr;
if ((ImageBase == NULL) || (SegInfo == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (EiClass == ELFCLASS32) {
Elf32Phdr = GetElf32SegmentByIndex (ImageBase, Index);
if (Elf32Phdr != NULL) {
SegInfo->PtType = Elf32Phdr->p_type;
SegInfo->Offset = Elf32Phdr->p_offset;
SegInfo->Length = Elf32Phdr->p_filesz;
SegInfo->MemLen = Elf32Phdr->p_memsz;
SegInfo->MemAddr = Elf32Phdr->p_paddr;
SegInfo->Alignment = Elf32Phdr->p_align;
return EFI_SUCCESS;
}
} else if (EiClass == ELFCLASS64) {
Elf64Phdr = GetElf64SegmentByIndex (ImageBase, Index);
if (Elf64Phdr != NULL) {
SegInfo->PtType = Elf64Phdr->p_type;
SegInfo->Offset = (UINTN)Elf64Phdr->p_offset;
SegInfo->Length = (UINTN)Elf64Phdr->p_filesz;
SegInfo->MemLen = (UINTN)Elf64Phdr->p_memsz;
SegInfo->MemAddr = (UINTN)Elf64Phdr->p_paddr;
SegInfo->Alignment = (UINTN)Elf64Phdr->p_align;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
Parse the ELF image info.
On return, all fields in ElfCt are updated except ImageAddress.
@param[in] ImageBase Memory address of an image.
@param[out] ElfCt The EFL image context pointer.
@retval EFI_INVALID_PARAMETER Input parameters are not valid.
@retval EFI_UNSUPPORTED Unsupported binary type.
@retval EFI_LOAD_ERROR ELF binary loading error.
@retval EFI_SUCCESS ELF binary is loaded successfully.
**/
EFI_STATUS
EFIAPI
ParseElfImage (
IN VOID *ImageBase,
OUT ELF_IMAGE_CONTEXT *ElfCt
)
{
Elf32_Ehdr *Elf32Hdr;
Elf64_Ehdr *Elf64Hdr;
Elf32_Shdr *Elf32Shdr;
Elf64_Shdr *Elf64Shdr;
EFI_STATUS Status;
UINT32 Index;
SEGMENT_INFO SegInfo;
UINTN End;
UINTN Base;
if (ElfCt == NULL) {
return EFI_INVALID_PARAMETER;
}
ZeroMem (ElfCt, sizeof(ELF_IMAGE_CONTEXT));
if (ImageBase == NULL) {
return (ElfCt->ParseStatus = EFI_INVALID_PARAMETER);
}
ElfCt->FileBase = (UINT8 *)ImageBase;
if (!IsElfFormat (ElfCt->FileBase)) {
return (ElfCt->ParseStatus = EFI_UNSUPPORTED);
}
Elf32Hdr = (Elf32_Ehdr *)ElfCt->FileBase;
ElfCt->EiClass = Elf32Hdr->e_ident[EI_CLASS];
if (ElfCt->EiClass == ELFCLASS32) {
if ((Elf32Hdr->e_type != ET_EXEC) && (Elf32Hdr->e_type != ET_DYN)) {
return (ElfCt->ParseStatus = EFI_UNSUPPORTED);
}
Elf32Shdr = (Elf32_Shdr *)GetElf32SectionByIndex (ElfCt->FileBase, Elf32Hdr->e_shstrndx);
if (Elf32Shdr == NULL) {
return (ElfCt->ParseStatus = EFI_UNSUPPORTED);
}
ElfCt->EntryPoint = (UINTN)Elf32Hdr->e_entry;
ElfCt->ShNum = Elf32Hdr->e_shnum;
ElfCt->PhNum = Elf32Hdr->e_phnum;
ElfCt->ShStrLen = Elf32Shdr->sh_size;
ElfCt->ShStrOff = Elf32Shdr->sh_offset;
} else {
Elf64Hdr = (Elf64_Ehdr *)Elf32Hdr;
if ((Elf64Hdr->e_type != ET_EXEC) && (Elf64Hdr->e_type != ET_DYN)) {
return (ElfCt->ParseStatus = EFI_UNSUPPORTED);
}
Elf64Shdr = (Elf64_Shdr *)GetElf64SectionByIndex (ElfCt->FileBase, Elf64Hdr->e_shstrndx);
if (Elf64Shdr == NULL) {
return (ElfCt->ParseStatus = EFI_UNSUPPORTED);
}
ElfCt->EntryPoint = (UINTN)Elf64Hdr->e_entry;
ElfCt->ShNum = Elf64Hdr->e_shnum;
ElfCt->PhNum = Elf64Hdr->e_phnum;
ElfCt->ShStrLen = (UINT32)Elf64Shdr->sh_size;
ElfCt->ShStrOff = (UINT32)Elf64Shdr->sh_offset;
}
//
// Get the preferred image base and required memory size when loaded to new location.
//
End = 0;
Base = MAX_UINT32;
ElfCt->ReloadRequired = FALSE;
for (Index = 0; Index < ElfCt->PhNum; Index++) {
Status = GetElfSegmentInfo (ElfCt->FileBase, ElfCt->EiClass, Index, &SegInfo);
ASSERT_EFI_ERROR (Status);
if (SegInfo.PtType != PT_LOAD) {
continue;
}
if (SegInfo.MemLen != SegInfo.Length) {
//
// Not enough space to execute at current location.
//
ElfCt->ReloadRequired = TRUE;
}
if (Base > (SegInfo.MemAddr & ~(EFI_PAGE_SIZE - 1))) {
Base = SegInfo.MemAddr & ~(EFI_PAGE_SIZE - 1);
}
if (End < ALIGN_VALUE (SegInfo.MemAddr + SegInfo.MemLen, EFI_PAGE_SIZE) - 1) {
End = ALIGN_VALUE (SegInfo.MemAddr + SegInfo.MemLen, EFI_PAGE_SIZE) - 1;
}
}
//
// 0 - MAX_UINT32 + 1 equals to 0.
//
ElfCt->ImageSize = End - Base + 1;
ElfCt->PreferredImageAddress = (VOID *) Base;
CalculateElfFileSize (ElfCt, &ElfCt->FileSize);
return (ElfCt->ParseStatus = EFI_SUCCESS);;
}
/**
Load the ELF image to Context.ImageAddress.
Context should be initialized by ParseElfImage().
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.
@param[in] ElfCt ELF image context pointer.
@retval EFI_INVALID_PARAMETER Input parameters are not valid.
@retval EFI_UNSUPPORTED Unsupported binary type.
@retval EFI_LOAD_ERROR ELF binary loading error.
@retval EFI_SUCCESS ELF binary is loaded successfully.
**/
EFI_STATUS
EFIAPI
LoadElfImage (
IN ELF_IMAGE_CONTEXT *ElfCt
)
{
EFI_STATUS Status;
if (ElfCt == NULL) {
return EFI_INVALID_PARAMETER;
}
if (EFI_ERROR (ElfCt->ParseStatus)) {
return ElfCt->ParseStatus;
}
if (ElfCt->ImageAddress == NULL) {
return EFI_INVALID_PARAMETER;
}
Status = EFI_UNSUPPORTED;
if (ElfCt->EiClass == ELFCLASS32) {
Status = LoadElf32Image (ElfCt);
} else if (ElfCt->EiClass == ELFCLASS64) {
Status = LoadElf64Image (ElfCt);
}
return Status;
}
/**
Get a ELF section name from its index.
@param[in] ElfCt ELF image context pointer.
@param[in] SectionIndex ELF section index.
@param[out] SectionName The pointer to the section name.
@retval EFI_INVALID_PARAMETER ElfCt or SecName is NULL.
@retval EFI_NOT_FOUND Could not find the section.
@retval EFI_SUCCESS Section name was filled successfully.
**/
EFI_STATUS
EFIAPI
GetElfSectionName (
IN ELF_IMAGE_CONTEXT *ElfCt,
IN UINT32 SectionIndex,
OUT CHAR8 **SectionName
)
{
Elf32_Shdr *Elf32Shdr;
Elf64_Shdr *Elf64Shdr;
CHAR8 *Name;
if ((ElfCt == NULL) || (SectionName == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (EFI_ERROR (ElfCt->ParseStatus)) {
return ElfCt->ParseStatus;
}
Name = NULL;
if (ElfCt->EiClass == ELFCLASS32) {
Elf32Shdr = GetElf32SectionByIndex (ElfCt->FileBase, SectionIndex);
if ((Elf32Shdr != NULL) && (Elf32Shdr->sh_name < ElfCt->ShStrLen)) {
Name = (CHAR8 *)(ElfCt->FileBase + ElfCt->ShStrOff + Elf32Shdr->sh_name);
}
} else if (ElfCt->EiClass == ELFCLASS64) {
Elf64Shdr = GetElf64SectionByIndex (ElfCt->FileBase, SectionIndex);
if ((Elf64Shdr != NULL) && (Elf64Shdr->sh_name < ElfCt->ShStrLen)) {
Name = (CHAR8 *)(ElfCt->FileBase + ElfCt->ShStrOff + Elf64Shdr->sh_name);
}
}
if (Name == NULL) {
return EFI_NOT_FOUND;
}
*SectionName = Name;
return EFI_SUCCESS;
}
/**
Get the offset and size of x-th ELF section.
@param[in] ElfCt ELF image context pointer.
@param[in] Index ELF section index.
@param[out] Offset Return the offset of the specific section.
@param[out] Size Return the size of the specific section.
@retval EFI_INVALID_PARAMETER ImageBase, Offset or Size is NULL.
@retval EFI_INVALID_PARAMETER EiClass doesn't equal to ELFCLASS32 or ELFCLASS64.
@retval EFI_NOT_FOUND Could not find the section.
@retval EFI_SUCCESS Offset and Size are returned.
**/
EFI_STATUS
EFIAPI
GetElfSectionPos (
IN ELF_IMAGE_CONTEXT *ElfCt,
IN UINT32 Index,
OUT UINTN *Offset,
OUT UINTN *Size
)
{
Elf32_Shdr *Elf32Shdr;
Elf64_Shdr *Elf64Shdr;
if ((ElfCt == NULL) || (Offset == NULL) || (Size == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (EFI_ERROR (ElfCt->ParseStatus)) {
return ElfCt->ParseStatus;
}
if (ElfCt->EiClass == ELFCLASS32) {
Elf32Shdr = GetElf32SectionByIndex (ElfCt->FileBase, Index);
if (Elf32Shdr != NULL) {
*Offset = (UINTN)Elf32Shdr->sh_offset;
*Size = (UINTN)Elf32Shdr->sh_size;
return EFI_SUCCESS;
}
} else if (ElfCt->EiClass == ELFCLASS64) {
Elf64Shdr = GetElf64SectionByIndex (ElfCt->FileBase, Index);
if (Elf64Shdr != NULL) {
*Offset = (UINTN)Elf64Shdr->sh_offset;
*Size = (UINTN)Elf64Shdr->sh_size;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}

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/** @file
ELF library
Copyright (c) 2019 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef EFI_LIB_INTERNAL_H_
#define EFI_LIB_INTERNAL_H_
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include "ElfLib.h"
#include "ElfCommon.h"
#include "Elf32.h"
#include "Elf64.h"
#define ELF_NEXT_ENTRY(EntryType, Current, EntrySize) \
((EntryType *) ((UINT8 *)Current + EntrySize))
/**
Return the section header specified by Index.
@param ImageBase The image base.
@param Index The section index.
@return Pointer to the section header.
**/
Elf32_Shdr *
GetElf32SectionByIndex (
IN UINT8 *ImageBase,
IN UINT32 Index
);
/**
Return the section header specified by Index.
@param ImageBase The image base.
@param Index The section index.
@return Pointer to the section header.
**/
Elf64_Shdr *
GetElf64SectionByIndex (
IN UINT8 *ImageBase,
IN UINT32 Index
);
/**
Return the segment header specified by Index.
@param ImageBase The image base.
@param Index The segment index.
@return Pointer to the segment header.
**/
Elf32_Phdr *
GetElf32SegmentByIndex (
IN UINT8 *ImageBase,
IN UINT32 Index
);
/**
Return the segment header specified by Index.
@param ImageBase The image base.
@param Index The segment index.
@return Pointer to the segment header.
**/
Elf64_Phdr *
GetElf64SegmentByIndex (
IN UINT8 *ImageBase,
IN UINT32 Index
);
/**
Load ELF image which has 32-bit architecture
@param[in] ElfCt ELF image context pointer.
@retval EFI_SUCCESS ELF binary is loaded successfully.
@retval Others Loading ELF binary fails.
**/
EFI_STATUS
LoadElf32Image (
IN ELF_IMAGE_CONTEXT *ElfCt
);
/**
Load ELF image which has 64-bit architecture
@param[in] ImageBase Memory address of an image.
@param[out] EntryPoint The entry point of loaded ELF image.
@retval EFI_SUCCESS ELF binary is loaded successfully.
@retval Others Loading ELF binary fails.
**/
EFI_STATUS
LoadElf64Image (
IN ELF_IMAGE_CONTEXT *ElfCt
);
#endif

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/** @file
ELF Load Image Support
Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <UniversalPayload/UniversalPayload.h>
#include <UniversalPayload/ExtraData.h>
#include <Ppi/LoadFile.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BaseMemoryLib.h>
#include "ElfLib.h"
/**
The wrapper function of PeiLoadImageLoadImage().
@param This - Pointer to EFI_PEI_LOAD_FILE_PPI.
@param FileHandle - Pointer to the FFS file header of the image.
@param ImageAddressArg - Pointer to PE/TE image.
@param ImageSizeArg - Size of PE/TE image.
@param EntryPoint - Pointer to entry point of specified image file for output.
@param AuthenticationState - Pointer to attestation authentication state of image.
@return Status of PeiLoadImageLoadImage().
**/
EFI_STATUS
EFIAPI
PeiLoadFileLoadPayload (
IN CONST EFI_PEI_LOAD_FILE_PPI *This,
IN EFI_PEI_FILE_HANDLE FileHandle,
OUT EFI_PHYSICAL_ADDRESS *ImageAddressArg, OPTIONAL
OUT UINT64 *ImageSizeArg, OPTIONAL
OUT EFI_PHYSICAL_ADDRESS *EntryPoint,
OUT UINT32 *AuthenticationState
)
{
EFI_STATUS Status;
VOID *Elf;
UNIVERSAL_PAYLOAD_EXTRA_DATA *ExtraData;
ELF_IMAGE_CONTEXT Context;
UNIVERSAL_PAYLOAD_INFO_HEADER *PldInfo;
UINT32 Index;
UINT16 ExtraDataIndex;
CHAR8 *SectionName;
UINTN Offset;
UINTN Size;
UINT32 ExtraDataCount;
UINTN Instance;
//
// ELF is added to file as RAW section for EDKII bootloader.
// But RAW section might be added by build tool before the ELF RAW section when alignment is specified for ELF RAW section.
// Below loop skips the RAW section that doesn't contain valid ELF image.
//
Instance = 0;
do {
Status = PeiServicesFfsFindSectionData3 (EFI_SECTION_RAW, Instance++, FileHandle, &Elf, AuthenticationState);
if (EFI_ERROR (Status)) {
return Status;
}
ZeroMem (&Context, sizeof (Context));
Status = ParseElfImage (Elf, &Context);
} while (EFI_ERROR (Status));
DEBUG ((
DEBUG_INFO, "Payload File Size: 0x%08X, Mem Size: 0x%08x, Reload: %d\n",
Context.FileSize, Context.ImageSize, Context.ReloadRequired
));
//
// Get UNIVERSAL_PAYLOAD_INFO_HEADER and number of additional PLD sections.
//
PldInfo = NULL;
ExtraDataCount = 0;
for (Index = 0; Index < Context.ShNum; Index++) {
Status = GetElfSectionName (&Context, Index, &SectionName);
if (EFI_ERROR(Status)) {
continue;
}
DEBUG ((DEBUG_INFO, "Payload Section[%d]: %a\n", Index, SectionName));
if (AsciiStrCmp(SectionName, UNIVERSAL_PAYLOAD_INFO_SEC_NAME) == 0) {
Status = GetElfSectionPos (&Context, Index, &Offset, &Size);
if (!EFI_ERROR(Status)) {
PldInfo = (UNIVERSAL_PAYLOAD_INFO_HEADER *)(Context.FileBase + Offset);
}
} else if (AsciiStrnCmp(SectionName, UNIVERSAL_PAYLOAD_EXTRA_SEC_NAME_PREFIX, UNIVERSAL_PAYLOAD_EXTRA_SEC_NAME_PREFIX_LENGTH) == 0) {
Status = GetElfSectionPos (&Context, Index, &Offset, &Size);
if (!EFI_ERROR (Status)) {
ExtraDataCount++;
}
}
}
//
// Report the additional PLD sections through HOB.
//
ExtraData = BuildGuidHob (
&gUniversalPayloadExtraDataGuid,
sizeof (UNIVERSAL_PAYLOAD_EXTRA_DATA) + ExtraDataCount * sizeof (UNIVERSAL_PAYLOAD_EXTRA_DATA_ENTRY)
);
ExtraData->Count = ExtraDataCount;
if (ExtraDataCount != 0) {
for (ExtraDataIndex = 0, Index = 0; Index < Context.ShNum; Index++) {
Status = GetElfSectionName (&Context, Index, &SectionName);
if (EFI_ERROR(Status)) {
continue;
}
if (AsciiStrnCmp(SectionName, UNIVERSAL_PAYLOAD_EXTRA_SEC_NAME_PREFIX, UNIVERSAL_PAYLOAD_EXTRA_SEC_NAME_PREFIX_LENGTH) == 0) {
Status = GetElfSectionPos (&Context, Index, &Offset, &Size);
if (!EFI_ERROR (Status)) {
ASSERT (ExtraDataIndex < ExtraDataCount);
AsciiStrCpyS (
ExtraData->Entry[ExtraDataIndex].Identifier,
sizeof(ExtraData->Entry[ExtraDataIndex].Identifier),
SectionName + UNIVERSAL_PAYLOAD_EXTRA_SEC_NAME_PREFIX_LENGTH
);
ExtraData->Entry[ExtraDataIndex].Base = (UINTN)(Context.FileBase + Offset);
ExtraData->Entry[ExtraDataIndex].Size = Size;
ExtraDataIndex++;
}
}
}
}
if (Context.ReloadRequired || Context.PreferredImageAddress != Context.FileBase) {
Context.ImageAddress = AllocatePages (EFI_SIZE_TO_PAGES (Context.ImageSize));
} else {
Context.ImageAddress = Context.FileBase;
}
//
// Load ELF into the required base
//
Status = LoadElfImage (&Context);
if (!EFI_ERROR(Status)) {
*ImageAddressArg = (UINTN) Context.ImageAddress;
*EntryPoint = Context.EntryPoint;
*ImageSizeArg = Context.ImageSize;
}
return Status;
}
EFI_PEI_LOAD_FILE_PPI mPeiLoadFilePpi = {
PeiLoadFileLoadPayload
};
EFI_PEI_PPI_DESCRIPTOR gPpiLoadFilePpiList = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPeiLoadFilePpiGuid,
&mPeiLoadFilePpi
};
/**
Install Pei Load File PPI.
@param FileHandle Handle of the file being invoked.
@param PeiServices Describes the list of possible PEI Services.
@retval EFI_SUCESS The entry point executes successfully.
@retval Others Some error occurs during the execution of this function.
**/
EFI_STATUS
EFIAPI
InitializePayloadLoaderPeim (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
Status = PeiServicesInstallPpi (&gPpiLoadFilePpiList);
return Status;
}

59
UefiPayloadPkg/PayloadLoaderPeim/PayloadLoaderPeim.inf Normal file
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## @file
# Produce LoadFile PPI for payload loading.
#
# Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
##
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = PayloadLoaderPeim
FILE_GUID = D071A3B4-3EC1-40C5-BEF8-D0BD4A2446F0
MODULE_TYPE = PEIM
VERSION_STRING = 1.0
ENTRY_POINT = InitializePayloadLoaderPeim
#
# The following information is for reference only and not required by the build tools.
#
# VALID_ARCHITECTURES = IA32 X64
#
[Sources]
PayloadLoaderPeim.c
ElfLib.h
ElfLib/ElfLibInternal.h
ElfLib/ElfCommon.h
ElfLib/Elf32.h
ElfLib/Elf64.h
ElfLib/ElfLibInternal.h
ElfLib/ElfLib.c
ElfLib/Elf32Lib.c
ElfLib/Elf64Lib.c
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
UefiPayloadPkg/UefiPayloadPkg.dec
[LibraryClasses]
PcdLib
MemoryAllocationLib
BaseMemoryLib
PeiServicesLib
HobLib
BaseLib
PeimEntryPoint
DebugLib
[Ppis]
gEfiPeiLoadFilePpiGuid ## PRODUCES
[Guids]
gUniversalPayloadExtraDataGuid ## PRODUCES
[Depex]
TRUE