/* vim: tabstop=4 shiftwidth=4 noexpandtab * * ELF Binary Executable headers * */ #pragma once /* * Different bits of our build environment * require different header files for definitions */ #ifdef _KERNEL_ # include #else # include #endif /* * Unless otherwise stated, the definitions herein * are sourced from the Portable Formats Specification, * version 1.1 - ELF: Executable and Linkable Format */ /* * ELF Magic Signature */ #define ELFMAG0 0x7f #define ELFMAG1 'E' #define ELFMAG2 'L' #define ELFMAG3 'F' #define EI_NIDENT 16 /* * ELF Datatypes */ typedef uint32_t Elf32_Word; typedef uint32_t Elf32_Addr; typedef uint32_t Elf32_Off; typedef uint32_t Elf32_Sword; typedef uint16_t Elf32_Half; /* * ELF Header */ 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_Header; /* * e_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_LOPROC 0xff0 /* [Processor Specific] */ #define ET_HIPROC 0xfff /* [Processor Specific] */ /* * Machine types */ #define EM_NONE 0 #define EM_386 3 #define EV_NONE 0 #define EV_CURRENT 1 /** Program Header */ 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; /* p_type values */ #define PT_NULL 0 /* Unused, skip me */ #define PT_LOAD 1 /* Loadable segment */ #define PT_DYNAMIC 2 /* Dynamic linking information */ #define PT_INTERP 3 /* Interpreter (null-terminated string, pathname) */ #define PT_NOTE 4 /* Auxillary information */ #define PT_SHLIB 5 /* Reserved. */ #define PT_PHDR 6 /* Oh, it's me. Hello! Back-reference to the header table itself */ #define PT_LOPROC 0x70000000 #define PT_HIPROC 0x7FFFFFFF /** Section Header */ 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 { uint32_t id; uintptr_t ptr; } Elf32_auxv; 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 { Elf32_Addr r_offset; Elf32_Word r_info; } Elf32_Rel; typedef struct { Elf32_Sword d_tag; union { Elf32_Word d_val; Elf32_Addr d_ptr; Elf32_Off d_off; } d_un; } Elf32_Dyn; /* sh_type values */ #define SHT_NONE 0 #define SHT_PROGBITS 1 #define SHT_SYMTAB 2 #define SHT_STRTAB 3 #define SHT_NOBITS 8 #define SHT_REL 9 #define ELF32_R_SYM(i) ((i) >> 8) #define ELF32_R_TYPE(i) ((unsigned char)(i)) #define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t)) #define ELF32_ST_BIND(i) ((i) >> 4) #define ELF32_ST_TYPE(i) ((i) & 0xf) #define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf)) #define STB_LOCAL 0 #define STB_GLOBAL 1 #define STB_WEAK 2 #define STB_NUM 3 #define STB_LOPROC 13 #define STB_HIPROC 15 #define STT_NOTYPE 0 #define STT_OBJECT 1 #define STT_FUNC 2 #define STT_SECTION 3 #define STT_FILE 4 #define STT_COMMON 5 #define STT_TLS 6 #define STT_NUM 7 #define STT_LOPROC 13 #define STT_HIPROC 15