/**************************** elf.h ***********************************
* Author: Agner Fog
* Date created: 2006-07-18
* Last modified: 2009-07-15
* Project: objconv
* Module: elf.h
* Description:
* Header file for definition of structures in 32 and 64 bit ELF object file
* format.
*
* Copyright 2006-2009 GNU General Public License http://www.gnu.org/licenses
*****************************************************************************/
#ifndef ELF_H
#define ELF_H
/********************** FILE HEADER **********************/
struct Elf32_Ehdr {
uint8 e_ident[16]; // Magic number and other info
uint16 e_type; // Object file type
uint16 e_machine; // Architecture
uint32 e_version; // Object file version
uint32 e_entry; // Entry point virtual address
uint32 e_phoff; // Program header table file offset
uint32 e_shoff; // Section header table file offset
uint32 e_flags; // Processor-specific flags
uint16 e_ehsize; // ELF header size in bytes
uint16 e_phentsize; // Program header table entry size
uint16 e_phnum; // Program header table entry count
uint16 e_shentsize; // Section header table entry size
uint16 e_shnum; // Section header table entry count
uint16 e_shstrndx; // Section header string table index
};
struct Elf64_Ehdr {
uint8 e_ident[16]; // Magic number and other info
uint16 e_type; // Object file type
uint16 e_machine; // Architecture
uint32 e_version; // Object file version
uint64 e_entry; // Entry point virtual address
uint64 e_phoff; // Program header table file offset
uint64 e_shoff; // Section header table file offset
uint32 e_flags; // Processor-specific flags
uint16 e_ehsize; // ELF header size in bytes
uint16 e_phentsize; // Program header table entry size
uint16 e_phnum; // Program header table entry count
uint16 e_shentsize; // Section header table entry size
uint16 e_shnum; // Section header table entry count
uint16 e_shstrndx; // Section header string table index
};
/* Fields in the e_ident array. The EI_* macros are indices into the
array. The macros under each EI_* macro are the values the byte
may have. */
/* Conglomeration of the identification bytes, for easy testing as a word. */
#define ELFMAG "\177ELF"
#define EI_CLASS 4 /* File class byte index */
#define ELFCLASSNONE 0 /* Invalid class */
#define ELFCLASS32 1 /* 32-bit objects */
#define ELFCLASS64 2 /* 64-bit objects */
#define ELFCLASSNUM 3
#define EI_DATA 5 /* Data encoding byte index */
#define ELFDATANONE 0 /* Invalid data encoding */
#define ELFDATA2LSB 1 /* 2's complement, little endian */
#define ELFDATA2MSB 2 /* 2's complement, big endian */
#define ELFDATANUM 3
#define EI_VERSION 6 /* File version byte index */
/* Value must be EV_CURRENT */
#define EI_OSABI 7 /* OS ABI identification */
#define ELFOSABI_SYSV 0 /* UNIX System V ABI */
#define ELFOSABI_HPUX 1 /* HP-UX */
#define ELFOSABI_ARM 97 /* ARM */
#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
#define EI_ABIVERSION 8 /* ABI version */
#define EI_PAD 9 /* Byte index of padding bytes */
/* Legal values for e_type (object file type). */
#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_NUM 5 /* Number of defined types */
#define ET_LOOS 0xfe00 /* OS-specific range start */
#define ET_HIOS 0xfeff /* OS-specific range end */
#define ET_LOPROC 0xff00 /* Processor-specific range start */
#define ET_HIPROC 0xffff /* Processor-specific range end */
/* Legal values for e_machine (architecture). */
#define EM_NONE 0 /* No machine */
#define EM_M32 1 /* AT&T WE 32100 */
#define EM_SPARC 2 /* SUN SPARC */
#define EM_386 3 /* Intel 80386 */
#define EM_68K 4 /* Motorola m68k family */
#define EM_88K 5 /* Motorola m88k family */
#define EM_860 7 /* Intel 80860 */
#define EM_MIPS 8 /* MIPS R3000 big-endian */
#define EM_S370 9 /* IBM System/370 */
#define EM_MIPS_RS3_LE 10 /* MIPS R3000 little-endian */
#define EM_PARISC 15 /* HPPA */
#define EM_VPP500 17 /* Fujitsu VPP500 */
#define EM_SPARC32PLUS 18 /* Sun's "v8plus" */
#define EM_960 19 /* Intel 80960 */
#define EM_PPC 20 /* PowerPC */
#define EM_PPC64 21 /* PowerPC 64-bit */
#define EM_S390 22 /* IBM S390 */
#define EM_V800 36 /* NEC V800 series */
#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_FAKE_ALPHA 41 /* Digital Alpha */
#define EM_SH 42 /* Hitachi SH */
#define EM_SPARCV9 43 /* SPARC v9 64-bit */
#define EM_TRICORE 44 /* Siemens Tricore */
#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_IA_64 50 /* Intel Merced */
#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 Multimedia Accelerator*/
#define EM_PCP 55 /* Siemens PCP */
#define EM_NCPU 56 /* Sony nCPU embeeded RISC */
#define EM_NDR1 57 /* Denso NDR1 microprocessor */
#define EM_STARCORE 58 /* Motorola Start*Core processor */
#define EM_ME16 59 /* Toyota ME16 processor */
#define EM_ST100 60 /* STMicroelectronic ST100 processor */
#define EM_TINYJ 61 /* Advanced Logic Corp. Tinyj emb.fam*/
#define EM_X86_64 62 /* AMD x86-64 architecture */
#define EM_PDSP 63 /* Sony DSP Processor */
#define EM_FX66 66 /* Siemens FX66 microcontroller */
#define EM_ST9PLUS 67 /* STMicroelectronics ST9+ 8/16 mc */
#define EM_ST7 68 /* STmicroelectronics ST7 8 bit mc */
#define EM_68HC16 69 /* Motorola MC68HC16 microcontroller */
#define EM_68HC11 70 /* Motorola MC68HC11 microcontroller */
#define EM_68HC08 71 /* Motorola MC68HC08 microcontroller */
#define EM_68HC05 72 /* Motorola MC68HC05 microcontroller */
#define EM_SVX 73 /* Silicon Graphics SVx */
#define EM_AT19 74 /* STMicroelectronics ST19 8 bit mc */
#define EM_VAX 75 /* Digital VAX */
#define EM_CRIS 76 /* Axis Communications 32-bit embedded processor */
#define EM_JAVELIN 77 /* Infineon Technologies 32-bit embedded processor */
#define EM_FIREPATH 78 /* Element 14 64-bit DSP Processor */
#define EM_ZSP 79 /* LSI Logic 16-bit DSP Processor */
#define EM_MMIX 80 /* Donald Knuth's educational 64-bit processor */
#define EM_HUANY 81 /* Harvard University machine-independent object files */
#define EM_PRISM 82 /* SiTera Prism */
#define EM_AVR 83 /* Atmel AVR 8-bit microcontroller */
#define EM_FR30 84 /* Fujitsu FR30 */
#define EM_D10V 85 /* Mitsubishi D10V */
#define EM_D30V 86 /* Mitsubishi D30V */
#define EM_V850 87 /* NEC v850 */
#define EM_M32R 88 /* Mitsubishi M32R */
#define EM_MN10300 89 /* Matsushita MN10300 */
#define EM_MN10200 90 /* Matsushita MN10200 */
#define EM_PJ 91 /* picoJava */
#define EM_NUM 92
#define EM_ALPHA 0x9026
/* Legal values for e_version (version). */
#define EV_NONE 0 /* Invalid ELF version */
#define EV_CURRENT 1 /* Current version */
#define EV_NUM 2
/* Section header. */
struct Elf32_Shdr {
uint32 sh_name; // Section name (string tbl index)
uint32 sh_type; // Section type
uint32 sh_flags; // Section flags
uint32 sh_addr; // Section virtual addr at execution
uint32 sh_offset; // Section file offset
uint32 sh_size; // Section size in bytes
uint32 sh_link; // Link to another section
uint32 sh_info; // Additional section information
uint32 sh_addralign; // Section alignment
uint32 sh_entsize; // Entry size if section holds table
};
struct Elf64_Shdr {
uint32 sh_name; // Section name (string tbl index)
uint32 sh_type; // Section type
uint64 sh_flags; // Section flags
uint64 sh_addr; // Section virtual addr at execution
uint64 sh_offset; // Section file offset
uint64 sh_size; // Section size in bytes
uint32 sh_link; // Link to another section
uint32 sh_info; // Additional section information
uint64 sh_addralign; // Section alignment
uint64 sh_entsize; // Entry size if section holds table
};
/* Special section indices. */
#define SHN_UNDEF 0 // Undefined section
#define SHN_LORESERVE ((int16)0xff00) // Start of reserved indices
#define SHN_LOPROC ((int16)0xff00) // Start of processor-specific
#define SHN_HIPROC ((int16)0xff1f) // End of processor-specific
#define SHN_LOOS ((int16)0xff20) // Start of OS-specific
#define SHN_HIOS ((int16)0xff3f) // End of OS-specific
#define SHN_ABS ((int16)0xfff1) // Associated symbol is absolute
#define SHN_COMMON ((int16)0xfff2) // Associated symbol is common
#define SHN_XINDEX ((int16)0xffff) // Index is in extra table
#define SHN_HIRESERVE ((int16)0xffff) // End of reserved indices
// Legal values for sh_type (section type).
#define SHT_NULL 0 // Section header table entry unused
#define SHT_PROGBITS 1 // Program data
#define SHT_SYMTAB 2 // Symbol table
#define SHT_STRTAB 3 // String table
#define SHT_RELA 4 // Relocation entries with addends. Warning: Works only in 64 bit mode in my tests!
#define SHT_HASH 5 // Symbol hash table
#define SHT_DYNAMIC 6 // Dynamic linking information
#define SHT_NOTE 7 // Notes
#define SHT_NOBITS 8 // Program space with no data (bss)
#define SHT_REL 9 // Relocation entries, no addends
#define SHT_SHLIB 10 // Reserved
#define SHT_DYNSYM 11 // Dynamic linker symbol table
#define SHT_INIT_ARRAY 14 // Array of constructors
#define SHT_FINI_ARRAY 15 // Array of destructors
#define SHT_PREINIT_ARRAY 16 // Array of pre-constructors
#define SHT_GROUP 17 // Section group
#define SHT_SYMTAB_SHNDX 18 // Extended section indeces
#define SHT_NUM 19 // Number of defined types.
#define SHT_LOOS 0x60000000 // Start OS-specific
#define SHT_CHECKSUM 0x6ffffff8 // Checksum for DSO content.
#define SHT_LOSUNW 0x6ffffffa // Sun-specific low bound.
#define SHT_SUNW_move 0x6ffffffa
#define SHT_SUNW_COMDAT 0x6ffffffb
#define SHT_SUNW_syminfo 0x6ffffffc
#define SHT_GNU_verdef 0x6ffffffd // Version definition section.
#define SHT_GNU_verneed 0x6ffffffe // Version needs section.
#define SHT_GNU_versym 0x6fffffff // Version symbol table.
#define SHT_HISUNW 0x6fffffff // Sun-specific high bound.
#define SHT_HIOS 0x6fffffff // End OS-specific type
#define SHT_LOPROC 0x70000000 // Start of processor-specific
#define SHT_HIPROC 0x7fffffff // End of processor-specific
#define SHT_LOUSER 0x80000000 // Start of application-specific
#define SHT_HIUSER 0x8fffffff // End of application-specific
#define SHT_REMOVE_ME 0xffffff99 // Specific to objconv program: Removed debug or exception handler section
// Legal values for sh_flags (section flags).
#define SHF_WRITE (1 << 0) // Writable
#define SHF_ALLOC (1 << 1) // Occupies memory during execution
#define SHF_EXECINSTR (1 << 2) // Executable
#define SHF_MERGE (1 << 4) // Might be merged
#define SHF_STRINGS (1 << 5) // Contains nul-terminated strings
#define SHF_INFO_LINK (1 << 6) // `sh_info' contains SHT index
#define SHF_LINK_ORDER (1 << 7) // Preserve order after combining
#define SHF_OS_NONCONFORMING (1 << 8) // Non-standard OS specific handling required
#define SHF_MASKOS 0x0ff00000 // OS-specific.
#define SHF_MASKPROC 0xf0000000 // Processor-specific
/* Section group handling. */
#define GRP_COMDAT 0x1 /* Mark group as COMDAT. */
/* Symbol table entry. */
struct Elf32_Sym {
uint32 st_name; // Symbol name (string tbl index)
uint32 st_value; // Symbol value
uint32 st_size; // Symbol size
uint8 st_type: 4, // Symbol type
st_bind: 4; // Symbol binding
uint8 st_other; // Symbol visibility
uint16 st_shndx; // Section index
};
struct Elf64_Sym {
uint32 st_name; // Symbol name (string tbl index)
uint8 st_type: 4, // Symbol type
st_bind: 4; // Symbol binding
uint8 st_other; // Symbol visibility
uint16 st_shndx; // Section index
uint64 st_value; // Symbol value
uint64 st_size; // Symbol size
};
/* The syminfo section if available contains additional information about
every dynamic symbol. */
struct Elf32_Syminfo {
uint16 si_boundto; /* Direct bindings, symbol bound to */
uint16 si_flags; /* Per symbol flags */
};
struct Elf64_Syminfo {
uint16 si_boundto; /* Direct bindings, symbol bound to */
uint16 si_flags; /* Per symbol flags */
};
/* Possible values for si_boundto. */
#define SYMINFO_BT_SELF 0xffff /* Symbol bound to self */
#define SYMINFO_BT_PARENT 0xfffe /* Symbol bound to parent */
#define SYMINFO_BT_LOWRESERVE 0xff00 /* Beginning of reserved entries */
/* Possible bitmasks for si_flags. */
#define SYMINFO_FLG_DIRECT 0x0001 /* Direct bound symbol */
#define SYMINFO_FLG_PASSTHRU 0x0002 /* Pass-thru symbol for translator */
#define SYMINFO_FLG_COPY 0x0004 /* Symbol is a copy-reloc */
#define SYMINFO_FLG_LAZYLOAD 0x0008 /* Symbol bound to object to be lazy loaded */
/* Syminfo version values. */
#define SYMINFO_NONE 0
#define SYMINFO_CURRENT 1
#define SYMINFO_NUM 2
/* Special section index. */
#define SHN_UNDEF 0 /* No section, undefined symbol. */
// How to extract and insert information held in the st_info field.
// Both Elf32_Sym and Elf64_Sym use the same one-byte st_info field.
//#define ELF32_ST_BIND(val) (((uint8) (val)) >> 4)
//#define ELF32_ST_TYPE(val) ((val) & 0xf)
//#define ELF32_ST_INFO(bind,type) (((bind) << 4) + ((type) & 0xf))
// Legal values for ST_BIND subfield of st_info (symbol binding).
#define STB_LOCAL 0 // Local symbol
#define STB_GLOBAL 1 // Global symbol
#define STB_WEAK 2 // Weak symbol
#define STB_NUM 3 // Number of defined types.
#define STB_LOOS 10 // Start of OS-specific
#define STB_HIOS 12 // End of OS-specific
#define STB_LOPROC 13 // Start of processor-specific
#define STB_HIPROC 15 // End of processor-specific
// Legal values for ST_TYPE subfield of st_info (symbol type).
#define STT_NOTYPE 0 // Symbol type is unspecified
#define STT_OBJECT 1 // Symbol is a data object
#define STT_FUNC 2 // Symbol is a code object
#define STT_SECTION 3 // Symbol associated with a section
#define STT_FILE 4 // Symbol's name is file name
#define STT_COMMON 5 // Symbol is a common data object
#define STT_NUM 6 // Number of defined types.
#define STT_LOOS 10 // Start of OS-specific
#define STT_GNU_IFUNC 10 // Symbol is an indirect code object (function dispatcher)
#define STT_HIOS 12 // End of OS-specific
#define STT_LOPROC 13 // Start of processor-specific
#define STT_HIPROC 15 // End of processor-specific
/* Symbol table indices are found in the hash buckets and chain table
of a symbol hash table section. This special index value indicates
the end of a chain, meaning no further symbols are found in that bucket. */
#define STN_UNDEF 0 /* End of a chain. */
/* How to extract and insert information held in the st_other field. */
#define ELF32_ST_VISIBILITY(o) ((o) & 0x03)
/* For ELF64 the definitions are the same. */
#define ELF64_ST_VISIBILITY(o) ELF32_ST_VISIBILITY (o)
/* Symbol visibility specification encoded in the st_other field. */
#define STV_DEFAULT 0 /* Default symbol visibility rules */
#define STV_INTERNAL 1 /* Processor specific hidden class */
#define STV_HIDDEN 2 /* Sym unavailable in other modules */
#define STV_PROTECTED 3 /* Not preemptible, not exported */
// Relocation table entry structures
// How to extract and insert information held in the r_info field.
//#define ELF32_R_SYM(val) ((val) >> 8)
//#define ELF32_R_TYPE(val) ((val) & 0xff)
//#define ELF32_R_INFO(sym,type) (((sym) << 8) + ((type) & 0xff))
//#define ELF64_R_SYM(i) ((uint32)((i) >> 32))
//#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
//#define ELF64_R_INFO(sym,type) ((((uint64) (sym)) << 32) + (type))
// Relocation table entry without addend (in section of type SHT_REL)
struct Elf32_Rel {
uint32 r_offset; // Address
uint32 r_type: 8, // Relocation type
r_sym: 24; // Symbol index
};
struct Elf64_Rel {
uint64 r_offset; // Address
uint32 r_type; // Relocation type
uint32 r_sym; // Symbol index
};
// Relocation table entry with addend (in section of type SHT_RELA)
// Warning: Elf32_Rela doesn't work in any of the systems I have tried.
// Use Elf32_Rel instead with addend in relocated field.
// Use Elf64_Rela in 64 bit mode. Elf64_Rel not accepted?
struct Elf32_Rela {
uint32 r_offset; // Address
uint32 r_type: 8, // Relocation type
r_sym: 24; // Symbol index
int32 r_addend; // Addend
};
struct Elf64_Rela {
uint64 r_offset; // Address
uint32 r_type; // Relocation type
uint32 r_sym; // Symbol index
int64 r_addend; // Addend
};
// i386 Relocation types
#define R_386_NONE 0 // No reloc
#define R_386_32 1 // Direct 32 bit
#define R_386_PC32 2 // Self-relative 32 bit (not EIP relative in the sense used in COFF files)
#define R_386_GOT32 3 // 32 bit GOT entry
#define R_386_PLT32 4 // 32 bit PLT address
#define R_386_COPY 5 // Copy symbol at runtime
#define R_386_GLOB_DAT 6 // Create GOT entry
#define R_386_JMP_SLOT 7 // Create PLT entry
#define R_386_RELATIVE 8 // Adjust by program base
#define R_386_GOTOFF 9 // 32 bit offset to GOT
#define R_386_GOTPC 10 // 32 bit self relative offset to GOT
#define R_386_IRELATIVE 42 // Reference to PLT entry of indirect function (STT_GNU_IFUNC)
//#define R_386_NUM 11 // Number of entries
// AMD x86-64 relocation types
#define R_X86_64_NONE 0 // No reloc
#define R_X86_64_64 1 // Direct 64 bit
#define R_X86_64_PC32 2 // Self relative 32 bit signed (not RIP relative in the sense used in COFF files)
#define R_X86_64_GOT32 3 // 32 bit GOT entry
#define R_X86_64_PLT32 4 // 32 bit PLT address
#define R_X86_64_COPY 5 // Copy symbol at runtime
#define R_X86_64_GLOB_DAT 6 // Create GOT entry
#define R_X86_64_JUMP_SLOT 7 // Create PLT entry
#define R_X86_64_RELATIVE 8 // Adjust by program base
#define R_X86_64_GOTPCREL 9 // 32 bit signed self relative offset to GOT
#define R_X86_64_32 10 // Direct 32 bit zero extended
#define R_X86_64_32S 11 // Direct 32 bit sign extended
#define R_X86_64_16 12 // Direct 16 bit zero extended
#define R_X86_64_PC16 13 // 16 bit sign extended self relative
#define R_X86_64_8 14 // Direct 8 bit sign extended
#define R_X86_64_PC8 15 // 8 bit sign extended self relative
#define R_X86_64_IRELATIVE 37 // Reference to PLT entry of indirect function (STT_GNU_IFUNC)
//#define R_X86_64_NUM 16 // Number of entries
// Pseudo-record when ELF is used as intermediary between COFF and MachO:
#define R_UNSUPPORTED_IMAGEREL 21 // Image-relative not supported
// Program segment header.
struct Elf32_Phdr {
uint32 p_type; /* Segment type */
uint32 p_offset; /* Segment file offset */
uint32 p_vaddr; /* Segment virtual address */
uint32 p_paddr; /* Segment physical address */
uint32 p_filesz; /* Segment size in file */
uint32 p_memsz; /* Segment size in memory */
uint32 p_flags; /* Segment flags */
uint32 p_align; /* Segment alignment */
};
struct Elf64_Phdr {
uint32 p_type; /* Segment type */
uint32 p_flags; /* Segment flags */
uint64 p_offset; /* Segment file offset */
uint64 p_vaddr; /* Segment virtual address */
uint64 p_paddr; /* Segment physical address */
uint64 p_filesz; /* Segment size in file */
uint64 p_memsz; /* Segment size in memory */
uint64 p_align; /* Segment alignment */
};
/* Legal values for p_type (segment type). */
#define PT_NULL 0 /* Program header table entry unused */
#define PT_LOAD 1 /* Loadable program segment */
#define PT_DYNAMIC 2 /* Dynamic linking information */
#define PT_INTERP 3 /* Program interpreter */
#define PT_NOTE 4 /* Auxiliary information */
#define PT_SHLIB 5 /* Reserved */
#define PT_PHDR 6 /* Entry for header table itself */
#define PT_NUM 7 /* Number of defined types */
#define PT_LOOS 0x60000000 /* Start of OS-specific */
#define PT_HIOS 0x6fffffff /* End of OS-specific */
#define PT_LOPROC 0x70000000 /* Start of processor-specific */
#define PT_HIPROC 0x7fffffff /* End of processor-specific */
/* Legal values for p_flags (segment flags). */
#define PF_X (1 << 0) /* Segment is executable */
#define PF_W (1 << 1) /* Segment is writable */
#define PF_R (1 << 2) /* Segment is readable */
#define PF_MASKOS 0x0ff00000 /* OS-specific */
#define PF_MASKPROC 0xf0000000 /* Processor-specific */
/* Legal values for note segment descriptor types for core files. */
#define NT_PRSTATUS 1 /* Contains copy of prstatus struct */
#define NT_FPREGSET 2 /* Contains copy of fpregset struct */
#define NT_PRPSINFO 3 /* Contains copy of prpsinfo struct */
#define NT_PRXREG 4 /* Contains copy of prxregset struct */
#define NT_PLATFORM 5 /* String from sysinfo(SI_PLATFORM) */
#define NT_AUXV 6 /* Contains copy of auxv array */
#define NT_GWINDOWS 7 /* Contains copy of gwindows struct */
#define NT_PSTATUS 10 /* Contains copy of pstatus struct */
#define NT_PSINFO 13 /* Contains copy of psinfo struct */
#define NT_PRCRED 14 /* Contains copy of prcred struct */
#define NT_UTSNAME 15 /* Contains copy of utsname struct */
#define NT_LWPSTATUS 16 /* Contains copy of lwpstatus struct */
#define NT_LWPSINFO 17 /* Contains copy of lwpinfo struct */
#define NT_PRFPXREG 20 /* Contains copy of fprxregset struct*/
/* Legal values for the note segment descriptor types for object files. */
#define NT_VERSION 1 /* Contains a version string. */
/* Dynamic section entry. */
struct Elf32_Dyn {
int32 d_tag; /* Dynamic entry type */
union {
uint32 d_val; /* Integer value */
uint32 d_ptr; /* Address value */
} d_un;
};
struct Elf64_Dyn {
int64 d_tag; /* Dynamic entry type */
union {
uint64 d_val; /* Integer value */
uint64 d_ptr; /* Address value */
} d_un;
};
/* Legal values for d_tag (dynamic entry type). */
#define DT_NULL 0 /* Marks end of dynamic section */
#define DT_NEEDED 1 /* Name of needed library */
#define DT_PLTRELSZ 2 /* Size in bytes of PLT relocs */
#define DT_PLTGOT 3 /* Processor defined value */
#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 Rela relocs */
#define DT_RELASZ 8 /* Total size of Rela relocs */
#define DT_RELAENT 9 /* Size of one Rela reloc */
#define DT_STRSZ 10 /* Size of string table */
#define DT_SYMENT 11 /* Size of one symbol table entry */
#define DT_INIT 12 /* Address of init function */
#define DT_FINI 13 /* Address of termination function */
#define DT_SONAME 14 /* Name of shared object */
#define DT_RPATH 15 /* Library search path (deprecated) */
#define DT_SYMBOLIC 16 /* Start symbol search here */
#define DT_REL 17 /* Address of Rel relocs */
#define DT_RELSZ 18 /* Total size of Rel relocs */
#define DT_RELENT 19 /* Size of one Rel reloc */
#define DT_PLTREL 20 /* Type of reloc in PLT */
#define DT_DEBUG 21 /* For debugging; unspecified */
#define DT_TEXTREL 22 /* Reloc might modify .text */
#define DT_JMPREL 23 /* Address of PLT relocs */
#define DT_BIND_NOW 24 /* Process relocations of object */
#define DT_INIT_ARRAY 25 /* Array with addresses of init fct */
#define DT_FINI_ARRAY 26 /* Array with addresses of fini fct */
#define DT_INIT_ARRAYSZ 27 /* Size in bytes of DT_INIT_ARRAY */
#define DT_FINI_ARRAYSZ 28 /* Size in bytes of DT_FINI_ARRAY */
#define DT_RUNPATH 29 /* Library search path */
#define DT_FLAGS 30 /* Flags for the object being loaded */
#define DT_ENCODING 32 /* Start of encoded range */
#define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/
#define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */
#define DT_NUM 34 /* Number used */
#define DT_LOOS 0x60000000 /* Start of OS-specific */
#define DT_HIOS 0x6fffffff /* End of OS-specific */
#define DT_LOPROC 0x70000000 /* Start of processor-specific */
#define DT_HIPROC 0x7fffffff /* End of processor-specific */
#define DT_PROCNUM DT_MIPS_NUM /* Most used by any processor */
/* DT_* entries which fall between DT_VALRNGHI & DT_VALRNGLO use the
Dyn.d_un.d_val field of the Elf*_Dyn structure. This follows Sun's
approach. */
#define DT_VALRNGLO 0x6ffffd00
#define DT_CHECKSUM 0x6ffffdf8
#define DT_PLTPADSZ 0x6ffffdf9
#define DT_MOVEENT 0x6ffffdfa
#define DT_MOVESZ 0x6ffffdfb
#define DT_FEATURE_1 0x6ffffdfc /* Feature selection (DTF_*). */
#define DT_POSFLAG_1 0x6ffffdfd /* Flags for DT_* entries, effecting the following DT_* entry. */
#define DT_SYMINSZ 0x6ffffdfe /* Size of syminfo table (in bytes) */
#define DT_SYMINENT 0x6ffffdff /* Entry size of syminfo */
#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_SYMINFO 0x6ffffeff /* syminfo table */
#define DT_ADDRRNGHI 0x6ffffeff
/* The versioning entry types. The next are defined as part of the GNU extension. */
#define DT_VERSYM 0x6ffffff0
#define DT_RELACOUNT 0x6ffffff9
#define DT_RELCOUNT 0x6ffffffa
/* These were chosen by Sun. */
#define DT_FLAGS_1 0x6ffffffb /* State flags, see DF_1_* below. */
#define DT_VERDEF 0x6ffffffc /* Address of version definition table */
#define DT_VERDEFNUM 0x6ffffffd /* Number of version definitions */
#define DT_VERNEED 0x6ffffffe /* Address of table with needed versions */
#define DT_VERNEEDNUM 0x6fffffff /* Number of needed versions */
#define DT_VERSIONTAGIDX(tag) (DT_VERNEEDNUM - (tag)) /* Reverse order! */
#define DT_VERSIONTAGNUM 16
/* Sun added these machine-independent extensions in the "processor-specific"
range. Be compatible. */
#define DT_AUXILIARY 0x7ffffffd /* Shared object to load before self */
#define DT_FILTER 0x7fffffff /* Shared object to get values from */
#define DT_EXTRATAGIDX(tag) ((uint32)-((int32) (tag) <<1>>1)-1)
#define DT_EXTRANUM 3
/* Values of `d_un.d_val' in the DT_FLAGS entry. */
#define DF_ORIGIN 0x00000001 /* Object may use DF_ORIGIN */
#define DF_SYMBOLIC 0x00000002 /* Symbol resolutions starts here */
#define DF_TEXTREL 0x00000004 /* Object contains text relocations */
#define DF_BIND_NOW 0x00000008 /* No lazy binding for this object */
/* State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1
entry in the dynamic section. */
#define DF_1_NOW 0x00000001 /* Set RTLD_NOW for this object. */
#define DF_1_GLOBAL 0x00000002 /* Set RTLD_GLOBAL for this object. */
#define DF_1_GROUP 0x00000004 /* Set RTLD_GROUP for this object. */
#define DF_1_NODELETE 0x00000008 /* Set RTLD_NODELETE for this object.*/
#define DF_1_LOADFLTR 0x00000010 /* Trigger filtee loading at runtime.*/
#define DF_1_INITFIRST 0x00000020 /* Set RTLD_INITFIRST for this object*/
#define DF_1_NOOPEN 0x00000040 /* Set RTLD_NOOPEN for this object. */
#define DF_1_ORIGIN 0x00000080 /* $ORIGIN must be handled. */
#define DF_1_DIRECT 0x00000100 /* Direct binding enabled. */
#define DF_1_TRANS 0x00000200
#define DF_1_INTERPOSE 0x00000400 /* Object is used to interpose. */
#define DF_1_NODEFLIB 0x00000800 /* Ignore default lib search path. */
#define DF_1_NODUMP 0x00001000
#define DF_1_CONFALT 0x00002000
#define DF_1_ENDFILTEE 0x00004000
/* Flags for the feature selection in DT_FEATURE_1. */
#define DTF_1_PARINIT 0x00000001
#define DTF_1_CONFEXP 0x00000002
/* Flags in the DT_POSFLAG_1 entry effecting only the next DT_* entry. */
#define DF_P1_LAZYLOAD 0x00000001 /* Lazyload following object. */
#define DF_P1_GROUPPERM 0x00000002 /* Symbols from next object are not generally available. */
/* Version definition sections. */
struct Elf32_Verdef {
uint16 vd_version; /* Version revision */
uint16 vd_flags; /* Version information */
uint16 vd_ndx; /* Version Index */
uint16 vd_cnt; /* Number of associated aux entries */
uint32 vd_hash; /* Version name hash value */
uint32 vd_aux; /* Offset in bytes to verdaux array */
uint32 vd_next; /* Offset in bytes to next verdef entry */
};
struct Elf64_Verdef {
uint16 vd_version; /* Version revision */
uint16 vd_flags; /* Version information */
uint16 vd_ndx; /* Version Index */
uint16 vd_cnt; /* Number of associated aux entries */
uint32 vd_hash; /* Version name hash value */
uint32 vd_aux; /* Offset in bytes to verdaux array */
uint32 vd_next; /* Offset in bytes to next verdef entry */
};
/* Legal values for vd_version (version revision). */
#define VER_DEF_NONE 0 /* No version */
#define VER_DEF_CURRENT 1 /* Current version */
#define VER_DEF_NUM 2 /* Given version number */
/* Legal values for vd_flags (version information flags). */
#define VER_FLG_BASE 0x1 /* Version definition of file itself */
#define VER_FLG_WEAK 0x2 /* Weak version identifier */
/* Auxialiary version information. */
struct Elf32_Verdaux {
uint32 vda_name; /* Version or dependency names */
uint32 vda_next; /* Offset in bytes to next verdaux entry */
};
struct Elf64_Verdaux {
uint32 vda_name; /* Version or dependency names */
uint32 vda_next; /* Offset in bytes to next verdaux entry */
};
/* Version dependency section. */
struct Elf32_Verneed {
uint16 vn_version; /* Version of structure */
uint16 vn_cnt; /* Number of associated aux entries */
uint32 vn_file; /* Offset of filename for this dependency */
uint32 vn_aux; /* Offset in bytes to vernaux array */
uint32 vn_next; /* Offset in bytes to next verneed entry */
};
struct Elf64_Verneed {
uint16 vn_version; /* Version of structure */
uint16 vn_cnt; /* Number of associated aux entries */
uint32 vn_file; /* Offset of filename for this dependency */
uint32 vn_aux; /* Offset in bytes to vernaux array */
uint32 vn_next; /* Offset in bytes to next verneed entry */
};
/* Legal values for vn_version (version revision). */
#define VER_NEED_NONE 0 /* No version */
#define VER_NEED_CURRENT 1 /* Current version */
#define VER_NEED_NUM 2 /* Given version number */
/* Auxiliary needed version information. */
struct Elf32_Vernaux {
uint32 vna_hash; /* Hash value of dependency name */
uint16 vna_flags; /* Dependency specific information */
uint16 vna_other; /* Unused */
uint32 vna_name; /* Dependency name string offset */
uint32 vna_next; /* Offset in bytes to next vernaux entry */
};
struct Elf64_Vernaux {
uint32 vna_hash; /* Hash value of dependency name */
uint16 vna_flags; /* Dependency specific information */
uint16 vna_other; /* Unused */
uint32 vna_name; /* Dependency name string offset */
uint32 vna_next; /* Offset in bytes to next vernaux entry */
};
/* Legal values for vna_flags. */
#define VER_FLG_WEAK 0x2 /* Weak version identifier */
/* Note section contents. Each entry in the note section begins with
a header of a fixed form. */
struct Elf32_Nhdr {
uint32 n_namesz; /* Length of the note's name. */
uint32 n_descsz; /* Length of the note's descriptor. */
uint32 n_type; /* Type of the note. */
};
struct Elf64_Nhdr {
uint32 n_namesz; /* Length of the note's name. */
uint32 n_descsz; /* Length of the note's descriptor. */
uint32 n_type; /* Type of the note. */
};
/* Known names of notes. */
/* Solaris entries in the note section have this name. */
#define ELF_NOTE_SOLARIS "SUNW Solaris"
/* Note entries for GNU systems have this name. */
#define ELF_NOTE_GNU "GNU"
/* Defined types of notes for Solaris. */
/* Value of descriptor (one word) is desired pagesize for the binary. */
#define ELF_NOTE_PAGESIZE_HINT 1
/* Defined note types for GNU systems. */
/* ABI information. The descriptor consists of words:
word 0: OS descriptor
word 1: major version of the ABI
word 2: minor version of the ABI
word 3: subminor version of the ABI
*/
#define ELF_NOTE_ABI 1
/* Known OSes. These value can appear in word 0 of an ELF_NOTE_ABI
note section entry. */
#define ELF_NOTE_OS_LINUX 0
#define ELF_NOTE_OS_GNU 1
#define ELF_NOTE_OS_SOLARIS2 2
/* Move records. */
struct Elf32_Move {
uint64 m_value; /* Symbol value. */
uint32 m_info; /* Size and index. */
uint32 m_poffset; /* Symbol offset. */
uint16 m_repeat; /* Repeat count. */
uint16 m_stride; /* Stride info. */
};
struct Elf64_Move {
uint64 m_value; /* Symbol value. */
uint64 m_info; /* Size and index. */
uint64 m_poffset; /* Symbol offset. */
uint16 m_repeat; /* Repeat count. */
uint16 m_stride; /* Stride info. */
};
/* Macro to construct move records. */
#define ELF32_M_SYM(info) ((info) >> 8)
#define ELF32_M_SIZE(info) ((uint8) (info))
#define ELF32_M_INFO(sym, size) (((sym) << 8) + (uint8) (size))
#define ELF64_M_SYM(info) ELF32_M_SYM (info)
#define ELF64_M_SIZE(info) ELF32_M_SIZE (info)
#define ELF64_M_INFO(sym, size) ELF32_M_INFO (sym, size)
/********************** Strings **********************/
#define ELF_CONSTRUCTOR_NAME ".ctors" // Name of constructors segment
// Macros listing all word-size dependent structures, used as template parameter list
#define ELFSTRUCTURES TELF_Header, TELF_SectionHeader, TELF_Symbol, TELF_Relocation
#define ELF32STRUCTURES Elf32_Ehdr, Elf32_Shdr, Elf32_Sym, Elf32_Rela
#define ELF64STRUCTURES Elf64_Ehdr, Elf64_Shdr, Elf64_Sym, Elf64_Rela
#endif // #ifndef ELF_H