mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-09 11:16:47 +00:00
360 lines
14 KiB
C
360 lines
14 KiB
C
#pragma once
|
||
#include <common/glib.h>
|
||
|
||
// --> begin ==============EHDR=====================
|
||
// Reference: https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-43405.html#scrolltoc
|
||
|
||
// ====== ELF32 Header中的数据类型定义 ====
|
||
typedef uint32_t Elf32_Addr;
|
||
typedef uint16_t Elf32_Half;
|
||
typedef uint32_t Elf32_Off;
|
||
typedef uint32_t Elf32_SWord;
|
||
typedef uint32_t Elf32_Word;
|
||
|
||
// ====== ELF64 Header中的数据类型定义 ====
|
||
typedef uint64_t Elf64_Addr;
|
||
typedef uint16_t Elf64_Half;
|
||
typedef uint64_t Elf64_Off;
|
||
typedef uint32_t Elf64_Sword;
|
||
typedef uint32_t Elf64_Word;
|
||
typedef uint64_t Elf64_Xword;
|
||
typedef uint64_t Elf64_Sxword;
|
||
|
||
// ====== ELF Identification Index ======
|
||
// Purpose: File identification
|
||
#define EI_MAG0 0
|
||
#define EI_MAG1 1
|
||
#define EI_MAG2 2
|
||
#define EI_MAG3 3
|
||
// Purpose: File class
|
||
#define EI_CLASS 4
|
||
// Purpose: Data encoding
|
||
#define EI_DATA 5
|
||
// Purpose: File version
|
||
#define EI_VERSION 6 // e_ident[EI_VERSION]指定了ELF header的版本号 当前这个值必须是EV_CURRENT
|
||
|
||
// Purpose: Operating system/ABI identification
|
||
#define EI_OSABI 7 // e_ident[EI_OSABI]指定了操作系统以及对象所对应的ABI
|
||
|
||
// Purpose: ABI version
|
||
#define EI_ABIVERSION 8 // e_ident[EI_ABIVERSION] 指定了对象所对应的ABI版本.
|
||
|
||
// Purpose: Start of padding bytes
|
||
#define EI_PAD 9 // 这个值标志了e_ident中未使用字节的的起始下标
|
||
// Purpose: Size of e_ident[]
|
||
#define EI_NIDENT 16
|
||
|
||
// EI_MAG0 - EI_MAG3 这是一个4byte的 magic number
|
||
#define ELFMAG0 0x7f
|
||
#define ELFMAG1 'E'
|
||
#define ELFMAG2 'L'
|
||
#define ELFMAG3 'F'
|
||
|
||
// EI_CLASS e_ident[EI_CLASS]指明了文件的类型或capacity
|
||
#define ELFCLASSNONE 0 // Invalid class
|
||
#define ELFCLASS32 1 // 32–bit objects
|
||
#define ELFCLASS64 2 // 64–bit objects
|
||
|
||
// EI_DATA e_ident[EI_DATA]指明了与处理器相关的数据的编码方式
|
||
#define ELFDATANONE 0
|
||
#define ELFDATA2LSB 1 // 小端对齐
|
||
#define ELFDATA2MSB 2 // 大端对齐
|
||
|
||
// ELF e_type的类型定义
|
||
#define ET_NONE 0 // No file type
|
||
#define ET_REL 1 // Relocatable file
|
||
#define ET_EXEC 2 // Executable file
|
||
#define ET_DYN 3 // Shared object file
|
||
#define ET_CORE 4 // Core file
|
||
#define ET_LOPROC 0xff00 // Processor-specific
|
||
#define ET_HIPROC 0xffff // Processor-specific
|
||
|
||
// e_machine的类型定义
|
||
#define EM_NONE 0 // No machine
|
||
#define EM_SPARC 2 // SPARC
|
||
#define EM_386 3 // Intel 80386
|
||
#define EM_SPARC32PLUS 18 // Sun SPARC 32+
|
||
#define EM_SPARCV9 43 // SPARC V9
|
||
#define EM_AMD64 62 // AMD 64
|
||
|
||
// e_version的类型定义
|
||
#define EV_NONE 0 // Invalid Version
|
||
// EV_CURRENT: Value>=1 means current version
|
||
|
||
// e_flags 定义
|
||
// e_flags for SPARC
|
||
#define EF_SPARC_EXT_MASK 0xffff00 // Vendor Extension mask
|
||
#define EF_SPARC_32PLUS 0x000100 // Generic V8+ features
|
||
#define EF_SPARC_SUN_US1 0x000200 // Sun UltraSPARC 1 Extensions
|
||
#define EF_SPARC_HAL_R1 0x000400 // HAL R1 Extensions
|
||
#define EF_SPARC_SUN_US3 0x000800 // Sun UltraSPARC 3 Extensions
|
||
#define EF_SPARCV9_MM 0x3 // Mask for Memory Model
|
||
#define EF_SPARCV9_TSO 0x0 // Total Store Ordering
|
||
#define EF_SPARCV9_PSO 0x1 // Partial Store Ordering
|
||
#define EF_SPARCV9_RMO 0x2 // Relaxed Memory Ordering
|
||
|
||
#define PN_XNUM 0xffff
|
||
|
||
typedef struct
|
||
{
|
||
unsigned char e_ident[EI_NIDENT];
|
||
Elf32_Half e_type;
|
||
Elf32_Half e_machine;
|
||
Elf32_Word e_version;
|
||
Elf32_Addr e_entry;
|
||
Elf32_Off e_phoff;
|
||
Elf32_Off e_shoff;
|
||
Elf32_Word e_flags;
|
||
Elf32_Half e_ehsize;
|
||
Elf32_Half e_phentsize;
|
||
Elf32_Half e_phnum;
|
||
Elf32_Half e_shentsize;
|
||
Elf32_Half e_shnum;
|
||
Elf32_Half e_shstrndx;
|
||
} Elf32_Ehdr;
|
||
|
||
typedef struct
|
||
{
|
||
unsigned char e_ident[EI_NIDENT]; // 标志字节，这些字节与机器架构类型无关。目的是为了告诉我们如何解析这个文件的内容
|
||
Elf64_Half e_type; // 文件类型标志符
|
||
Elf64_Half e_machine; // 该文件依赖的处理器架构类型
|
||
Elf64_Word e_version; // 对象文件的版本
|
||
Elf64_Addr e_entry; // 进程的虚拟地址入点，使用字节偏移量表示。如果没有entry point，则该值为0
|
||
Elf64_Off e_phoff; // The program header table's file offset in bytes. 若没有，则为0
|
||
Elf64_Off e_shoff; // The section header table's file offset in bytes. 若没有，则为0
|
||
Elf64_Word e_flags; // 与处理器相关联的flags。格式为： EF_machine_flag 如果是x86架构，那么该值为0
|
||
Elf64_Half e_ehsize; // ELF Header的大小（单位：字节）
|
||
Elf64_Half e_phentsize; // 程序的program header table中的一个entry的大小（所有的entry大小相同）
|
||
Elf64_Half e_phnum; // program header table的entry数量
|
||
// e_phentsize*e_phnum=program header table的大小
|
||
// 如果没有program header table，该值为0
|
||
// 如果entry num>=PN_XNUM(0xffff), 那么该值为0xffff，且真实的pht的entry数量存储在section header的sh_info中（index=0）
|
||
// 其他情况下，第一个section header entry的sh_info的值为0
|
||
|
||
Elf64_Half e_shentsize; // 每个section header的大小（字节
|
||
// 每个section header是section header table的一个entry
|
||
|
||
Elf64_Half e_shnum; // section header table的entry数量
|
||
// e_shentsize*e_shnum=section header table的大小
|
||
// 如果没有section header table，那么该值为0
|
||
// 如果section的数量>=SHN_LORESERVE(0xff00)，那么该值为0，且真实的section数量存储在
|
||
// section header at index 0的sh_size变量中，否则第一个sh_size为0
|
||
|
||
Elf64_Half e_shstrndx; // 与section name string表相关联的section header table的entry的索引下标
|
||
// 如果没有name string table,那么该值等于SHN_UNDEF
|
||
// 如果对应的index>=SHN_LORESERVE(0xff00)， 那么该变量值为SHN_XINDEX(0xffff)
|
||
// 且真正的section name string table的index被存放在section header的index=0处的sh_link变量中
|
||
// 否则初始section header entry的sh_link变量为0
|
||
} Elf64_Ehdr;
|
||
|
||
// --> end ==============EHDR=====================
|
||
|
||
// --> begin ==============SHDR=====================
|
||
|
||
// reference: https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-94076.html#scrolltoc
|
||
|
||
// ===== ELF Special Section Indexes =====
|
||
#define SHN_UNDEF 0 // An undefined, missing, irrelevant, or otherwise meaningless section reference.
|
||
#define SHN_LORESERVE 0xff00 // The lower boundary of the range of reserved indexes.
|
||
// The system reserves indexes between SHN_LORESERVE and SHN_HIRESERVE, inclusive.
|
||
#define SHN_LOPROC 0xff00 // SHN_LOPROC - SHN_HIPROC 这个范围以内的数据为处理器特定的语义所保留
|
||
#define SHN_BEFORE 0xff00 // SHN_BEFORE, SHN_AFTER 与SHF_LINK_ORDER及SHF_ORDERED section flags一起，提供初始和终止section的
|
||
#define SHN_AFTER 0xff01
|
||
#define SHN_AMD64_LCOMMON 0xff02 // x64 specific common block label. This label is similar to SHN_COMMON, but provides for identifying a large common block.
|
||
#define SHN_HIPROC 0xff1f
|
||
#define SHN_LOOS 0xff20 // SHN_LOOS - SHN_HIOS 这个范围你的数为操作系统特定的语义所保留
|
||
#define SHN_LOSUNW 0xff3f // SHN_LOSUNW - SHN_HISUNW Values in this inclusive range are reserved for Sun-specific semantics.
|
||
#define SHN_SUNW_IGNORE 0xff3f // This section index provides a temporary symbol definition within relocatable objects. Reserved for internal use by dtrace(1M).
|
||
#define SHN_HISUNW 0xff3f
|
||
#define SHN_HIOS 0xff3f
|
||
#define SHN_ABS 0xfff1 // 对应的引用的绝对值。 举个例子，symbols defined relative to section number SHN_ABS have absolute values and are not affected by relocation.
|
||
#define SHN_COMMON 0xfff2 // Symbols defined relative to this section are common symbols
|
||
#define SHN_XINDEX 0xffff
|
||
#define SHN_HIRESERVE 0xffff // The upper boundary of the range of reserved indexes.
|
||
/*
|
||
Note -
|
||
Although index 0 is reserved as the undefined value,
|
||
the section header table contains an entry for index 0.
|
||
That is, if the e_shnum member of the ELF header indicates
|
||
a file has 6 entries in the section header table, the sections
|
||
have the indexes 0 through 5. The contents of the initial entry
|
||
are specified later in this section.
|
||
*/
|
||
|
||
typedef struct
|
||
{
|
||
Elf32_Word sh_name;
|
||
Elf32_Word sh_type;
|
||
Elf32_Word sh_flags;
|
||
Elf32_Addr sh_addr;
|
||
Elf32_Off sh_offset;
|
||
Elf32_Word sh_size;
|
||
Elf32_Word sh_link;
|
||
Elf32_Word sh_info;
|
||
Elf32_Word sh_addralign;
|
||
Elf32_Word sh_entsize;
|
||
} Elf32_Shdr;
|
||
|
||
typedef struct
|
||
{
|
||
Elf64_Word sh_name; // 段名
|
||
Elf64_Word sh_type; // 段的类型（按照内容和语义来分类）
|
||
Elf64_Xword sh_flags;
|
||
Elf64_Addr sh_addr; // 该section在进程的内存空间中的基地址。如果该段不需要出现在内存中，该值为0
|
||
Elf64_Off sh_offset; // The byte offset from the beginning of the file to the first byte in the section
|
||
// 对于一个 SHT_NOBITS section，这个变量指的是概念上的偏移量。因为这种段并不是真正存在于文件中
|
||
Elf64_Xword sh_size; // The section's size in bytes(如果是SHT_NOBITS类型的section，section不会在文件中真正占用sh_size的空间)
|
||
Elf64_Word sh_link; // A section header table index link, whose interpretation depends on the section type.
|
||
Elf64_Word sh_info; // 依赖于section type来解析的额外的信息。如果sh_flags有SHF_INFO_LINK属性，那么这个变量代表一个section header table index.
|
||
Elf64_Xword sh_addralign; // 地址按照多少bytes对齐。只允许使用2的n次幂的值。如果值为0或1，则意味着地址没有对齐要求。
|
||
Elf64_Xword sh_entsize; // 如果某个段拥有指定size的entry，则在这里指定，否则为0
|
||
} Elf64_Shdr;
|
||
|
||
// ELF Section Types, sh_type
|
||
#define SHT_NULL 0
|
||
#define SHT_PROGBITS 1
|
||
#define SHT_SYMTAB 2 // Identifies a symbol table
|
||
#define SHT_STRTAB 3 // Identifies a string table.
|
||
#define SHT_RELA 4
|
||
#define SHT_HASH 5
|
||
#define SHT_DYNAMIC 6
|
||
#define SHT_NOTE 7
|
||
#define SHT_NOBITS 8
|
||
#define SHT_REL 9
|
||
#define SHT_SHLIB 10
|
||
#define SHT_DYNSYM 11 // Identifies a symbol table
|
||
#define SHT_INIT_ARRAY 14
|
||
#define SHT_FINI_ARRAY 15
|
||
#define SHT_PREINIT_ARRAY 16
|
||
#define SHT_GROUP 17
|
||
#define SHT_SYMTAB_SHNDX 18
|
||
#define SHT_LOOS 0x60000000
|
||
#define SHT_LOSUNW 0x6fffffef
|
||
#define SHT_SUNW_capchain 0x6fffffef
|
||
#define SHT_SUNW_capinfo 0x6ffffff0
|
||
#define SHT_SUNW_symsort 0x6ffffff1
|
||
#define SHT_SUNW_tlssort 0x6ffffff2
|
||
#define SHT_SUNW_LDYNSYM 0x6ffffff3 // Identifies a symbol table
|
||
#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_SUNW_verneed 0x6ffffffe
|
||
#define SHT_SUNW_versym 0x6fffffff
|
||
#define SHT_HISUNW 0x6fffffff
|
||
#define SHT_HIOS 0x6fffffff
|
||
#define SHT_LOPROC 0x70000000
|
||
#define SHT_SPARC_GOTDATA 0x70000000
|
||
#define SHT_AMD64_UNWIND 0x70000001
|
||
#define SHT_HIPROC 0x7fffffff
|
||
#define SHT_LOUSER 0x80000000
|
||
#define SHT_HIUSER 0xffffffff
|
||
|
||
// ELF Section Attribute Flags
|
||
#define SHF_WRITE 0x1 // Identifies a section that should be writable during process execution
|
||
#define SHF_ALLOC 0x2 // Identifies a section that occupies memory during process execution
|
||
#define SHF_EXECINSTR 0x4 // contains executable machine instructions
|
||
#define SHF_MERGE 0x10
|
||
#define SHF_STRINGS 0x20
|
||
#define SHF_INFO_LINK 0x40 // This section headers sh_info field holds a section header table index
|
||
#define SHF_LINK_ORDER 0x80 // This section adds special ordering requirements to the link-editor
|
||
#define SHF_OS_NONCONFORMING 0x100
|
||
#define SHF_GROUP 0x200
|
||
#define SHF_TLS 0x400
|
||
#define SHF_MASKOS 0x0ff00000
|
||
#define SHF_AMD64_LARGE 0x10000000 // identifies a section that can hold more than 2 Gbyte
|
||
#define SHF_ORDERED 0x40000000
|
||
#define SHF_EXCLUDE 0x80000000
|
||
#define SHF_MASKPROC 0xf0000000
|
||
|
||
// --> end ==============SHDR=====================
|
||
|
||
// --> begin ========== symbol table section ======
|
||
typedef struct
|
||
{
|
||
Elf32_Word st_name;
|
||
Elf32_Addr st_value;
|
||
Elf32_Word st_size;
|
||
unsigned char st_info;
|
||
unsigned char st_other;
|
||
Elf32_Half st_shndx;
|
||
} Elf32_Sym;
|
||
typedef struct
|
||
{
|
||
Elf64_Word st_name;
|
||
unsigned char st_info;
|
||
unsigned char st_other;
|
||
Elf64_Half st_shndx;
|
||
Elf64_Addr st_value;
|
||
Elf64_Xword st_size;
|
||
} Elf64_Sym;
|
||
|
||
// --> end ========== symbol table section ======
|
||
|
||
// --> begin ========== program header =========
|
||
// Ref: https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-83432.html#scrolltoc
|
||
|
||
typedef struct
|
||
{
|
||
Elf32_Word p_type;
|
||
Elf32_Off p_offset;
|
||
Elf32_Addr p_vaddr;
|
||
Elf32_Addr p_paddr;
|
||
Elf32_Word p_filesz;
|
||
Elf32_Word p_memsz;
|
||
Elf32_Word p_flags;
|
||
Elf32_Word p_align;
|
||
} Elf32_Phdr;
|
||
|
||
typedef struct
|
||
{
|
||
Elf64_Word p_type;
|
||
Elf64_Word p_flags;
|
||
Elf64_Off p_offset;
|
||
Elf64_Addr p_vaddr;
|
||
Elf64_Addr p_paddr;
|
||
Elf64_Xword p_filesz;
|
||
Elf64_Xword p_memsz;
|
||
Elf64_Xword p_align;
|
||
} Elf64_Phdr;
|
||
|
||
// ELF segment types
|
||
#define PT_NULL 0
|
||
#define PT_LOAD 1 // Specifies a loadable segment
|
||
#define PT_DYNAMIC 2 // Specifies dynamic linking information.
|
||
#define PT_INTERP 3 // Specifies the location and size of a null-terminated path name to invoke as an interpreter
|
||
#define PT_NOTE 4 // Specifies the location and size of auxiliary information
|
||
#define PT_SHLIB 5
|
||
#define PT_PHDR 6 // Specifies the location and size of the program header table
|
||
#define PT_TLS 7 // Specifies a thread-local storage template
|
||
/*
|
||
PT_LOOS - PT_HIOS
|
||
Values in this inclusive range are reserved for OS-specific semantics.
|
||
*/
|
||
#define PT_LOOS 0x60000000
|
||
#define PT_SUNW_UNWIND 0x6464e550
|
||
#define PT_SUNW_EH_FRAME 0x6474e550
|
||
#define PT_LOSUNW 0x6ffffffa
|
||
#define PT_SUNWBSS 0x6ffffffa
|
||
#define PT_SUNWSTACK 0x6ffffffb
|
||
#define PT_SUNWDTRACE 0x6ffffffc
|
||
#define PT_SUNWCAP 0x6ffffffd
|
||
#define PT_HISUNW 0x6fffffff
|
||
#define PT_HIOS 0x6fffffff
|
||
#define PT_LOPROC 0x70000000
|
||
#define PT_HIPROC 0x7fffffff
|
||
|
||
// ELF Segment Flags
|
||
#define PF_X 0x1 // Execute
|
||
#define PF_W 0x2 // Write
|
||
#define PF_R 0x4 // Read
|
||
#define PF_MASKPROC 0xf0000000 // Unspecified
|
||
|
||
|
||
// --> end ========== program header =========
|