mirror of
https://github.com/Fennix-Project/Lynx.git
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477 lines
13 KiB
C
477 lines
13 KiB
C
#ifndef __FENNIX_KERNEL_ELF_H__
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#define __FENNIX_KERNEL_ELF_H__
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#include <types.h>
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// https://wiki.osdev.org/ELF_Tutorial
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// https://github.com/torvalds/linux/blob/master/include/uapi/linux/elf.h
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/* 32-bit ELF base types. */
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typedef uint32_t Elf32_Addr;
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typedef uint16_t Elf32_Half;
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typedef uint32_t Elf32_Off;
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typedef int32_t Elf32_Sword;
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typedef uint32_t Elf32_Word;
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/* 64-bit ELF base types. */
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typedef uint64_t Elf64_Addr;
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typedef uint16_t Elf64_Half;
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typedef int16_t Elf64_SHalf;
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typedef uint64_t Elf64_Off;
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typedef int32_t Elf64_Sword;
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typedef uint32_t Elf64_Word;
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typedef uint64_t Elf64_Xword;
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typedef int64_t Elf64_Sxword;
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#define EI_NIDENT 16
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typedef struct elf32_hdr
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{
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unsigned char e_ident[EI_NIDENT];
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Elf32_Half e_type;
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Elf32_Half e_machine;
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Elf32_Word e_version;
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Elf32_Addr e_entry;
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Elf32_Off e_phoff;
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Elf32_Off e_shoff;
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Elf32_Word e_flags;
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Elf32_Half e_ehsize;
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Elf32_Half e_phentsize;
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Elf32_Half e_phnum;
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Elf32_Half e_shentsize;
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Elf32_Half e_shnum;
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Elf32_Half e_shstrndx;
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} Elf32_Ehdr;
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typedef struct elf64_hdr
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{
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unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */
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Elf64_Half e_type;
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Elf64_Half e_machine;
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Elf64_Word e_version;
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Elf64_Addr e_entry; /* Entry point virtual address */
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Elf64_Off e_phoff; /* Program header table file offset */
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Elf64_Off e_shoff; /* Section header table file offset */
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Elf64_Word e_flags;
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Elf64_Half e_ehsize;
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Elf64_Half e_phentsize;
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Elf64_Half e_phnum;
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Elf64_Half e_shentsize;
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Elf64_Half e_shnum;
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Elf64_Half e_shstrndx;
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} Elf64_Ehdr;
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typedef struct elf32_shdr
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{
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Elf32_Word sh_name;
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Elf32_Word sh_type;
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Elf32_Word sh_flags;
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Elf32_Addr sh_addr;
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Elf32_Off sh_offset;
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Elf32_Word sh_size;
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Elf32_Word sh_link;
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Elf32_Word sh_info;
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Elf32_Word sh_addralign;
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Elf32_Word sh_entsize;
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} Elf32_Shdr;
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typedef struct elf64_shdr
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{
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Elf64_Word sh_name; /* Section name, index in string tbl */
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Elf64_Word sh_type; /* Type of section */
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Elf64_Xword sh_flags; /* Miscellaneous section attributes */
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Elf64_Addr sh_addr; /* Section virtual addr at execution */
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Elf64_Off sh_offset; /* Section file offset */
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Elf64_Xword sh_size; /* Size of section in bytes */
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Elf64_Word sh_link; /* Index of another section */
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Elf64_Word sh_info; /* Additional section information */
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Elf64_Xword sh_addralign; /* Section alignment */
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Elf64_Xword sh_entsize; /* Entry size if section holds table */
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} Elf64_Shdr;
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typedef struct {
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Elf32_Word p_type;
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Elf32_Off p_offset;
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Elf32_Addr p_vaddr;
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Elf32_Addr p_paddr;
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Elf32_Word p_filesz;
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Elf32_Word p_memsz;
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Elf32_Word p_flags;
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Elf32_Word p_align;
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} Elf32_Phdr;
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typedef struct
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{
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Elf64_Word p_type;
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Elf64_Word p_flags;
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Elf64_Off p_offset;
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Elf64_Addr p_vaddr;
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Elf64_Addr p_paddr;
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Elf64_Xword p_filesz;
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Elf64_Xword p_memsz;
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Elf64_Xword p_align;
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} Elf64_Phdr;
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typedef struct elf32_rel
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{
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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} Elf32_Rel;
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typedef struct elf64_rel
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{
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Elf64_Addr r_offset; /* Location at which to apply the action */
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Elf64_Xword r_info; /* index and type of relocation */
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} Elf64_Rel;
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typedef struct elf32_sym
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{
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Elf32_Word st_name;
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Elf32_Addr st_value;
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Elf32_Word st_size;
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unsigned char st_info;
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unsigned char st_other;
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Elf32_Half st_shndx;
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} Elf32_Sym;
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typedef struct elf64_sym
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{
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Elf64_Word st_name; /* Symbol name, index in string tbl */
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unsigned char st_info; /* Type and binding attributes */
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unsigned char st_other; /* No defined meaning, 0 */
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Elf64_Half st_shndx; /* Associated section index */
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Elf64_Addr st_value; /* Value of the symbol */
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Elf64_Xword st_size; /* Associated symbol size */
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} Elf64_Sym;
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struct Elf32_Dyn
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{
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Elf32_Sword d_tag; /* Type of dynamic table entry. */
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union
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{
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Elf32_Word d_val; /* Integer value of entry. */
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Elf32_Addr d_ptr; /* Pointer value of entry. */
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} d_un;
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};
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struct Elf64_Dyn
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{
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Elf64_Sxword d_tag; /* Type of dynamic table entry. */
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union
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{
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Elf64_Xword d_val; /* Integer value of entry. */
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Elf64_Addr d_ptr; /* Pointer value of entry. */
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} d_un;
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};
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typedef struct
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{
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Elf64_Addr r_offset;
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Elf64_Xword r_info;
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Elf64_Sxword r_addend;
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} Elf64_Rela;
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enum Elf_Ident
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{
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EI_MAG0 = 0, // 0x7F
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EI_MAG1 = 1, // 'E'
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EI_MAG2 = 2, // 'L'
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EI_MAG3 = 3, // 'F'
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EI_CLASS = 4, // Architecture (32/64)
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EI_DATA = 5, // Byte Order
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EI_VERSION = 6, // ELF Version
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EI_OSABI = 7, // OS Specific
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EI_ABIVERSION = 8, // OS Specific
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EI_PAD = 9 // Padding
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};
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enum Elf_OSABI
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{
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ELFOSABI_NONE = 0,
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ELFOSABI_HPUX = 1,
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ELFOSABI_NETBSD = 2,
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ELFOSABI_LINUX = 3,
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ELFOSABI_HURD = 4,
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ELFOSABI_SOLARIS = 6,
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ELFOSABI_AIX = 7,
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ELFOSABI_IRIX = 8,
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ELFOSABI_FREEBSD = 9,
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ELFOSABI_TRU64 = 10,
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ELFOSABI_MODESTO = 11,
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ELFOSABI_OPENBSD = 12,
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ELFOSABI_OPENVMS = 13,
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ELFOSABI_NSK = 14,
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ELFOSABI_AROS = 15,
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ELFOSABI_FENIXOS = 16,
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ELFOSABI_CLOUDABI = 17,
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ELFOSABI_OPENVOS = 18,
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ELFOSABI_C6000_ELFABI = 64,
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ELFOSABI_C6000_LINUX = 65,
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ELFOSABI_ARM = 97,
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ELFOSABI_STANDALONE = 255
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};
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enum Elf_Type
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{
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ET_NONE = 0, // Unknown Type
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ET_REL = 1, // Relocatable File
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ET_EXEC = 2, // Executable File
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ET_DYN = 3, // Shared Object File
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ET_CORE = 4, // Core File
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ET_LOPROC = 0xff00, // Processor Specific
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ET_HIPROC = 0xffff // Processor Specific
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};
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enum RtT_Types
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{
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R_386_NONE = 0, // No relocation
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R_386_32 = 1, // Symbol + Offset
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R_386_PC32 = 2, // Symbol + Offset - Section Offset
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R_X86_64_NONE = 0,
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R_X86_64_64 = 1,
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R_X86_64_PC32 = 2,
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R_X86_64_GOT32 = 3,
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R_X86_64_PLT32 = 4,
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R_X86_64_COPY = 5,
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R_X86_64_GLOB_DAT = 6,
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R_X86_64_JUMP_SLOT = 7,
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R_X86_64_RELATIVE = 8,
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R_X86_64_GOTPCREL = 9,
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R_X86_64_32 = 10,
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R_X86_64_32S = 11,
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R_X86_64_16 = 12,
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};
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enum ProgFlags_Types
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{
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PF_X = 1,
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PF_W = 2,
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PF_R = 4
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};
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enum StT_Bindings
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{
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/**
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* @brief Local symbol. Symbol is not visible outside the object file.
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*/
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STB_LOCAL = 0,
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/**
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* @brief Global symbol. These symbols are visible to all object files being combined.
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*/
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STB_GLOBAL = 1,
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/**
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* @brief Weak symbols. These symbols are like global symbols, but their definitions are not required. Weak symbols are not visible outside the object file containing their definition.
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*/
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STB_WEAK = 2,
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/**
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* @brief Values in this inclusive range are reserved for operating system-specific semantics.
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*/
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STB_LOOS = 10,
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/**
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* @brief Values in this inclusive range are reserved for operating system-specific semantics.
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*/
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STB_HIOS = 12,
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/**
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* @brief Values in this inclusive range are reserved for processor-specific semantics.
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*/
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STB_LOPROC = 13,
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/**
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* @brief Values in this inclusive range are reserved for processor-specific semantics.
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*/
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STB_HIPROC = 15
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};
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enum StT_Types
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{
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STT_NOTYPE = 0, // No type
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STT_OBJECT = 1, // Variables, arrays, etc.
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STT_FUNC = 2 // Methods or functions
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};
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enum SegmentTypes
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{
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PT_NULL = 0,
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PT_LOAD = 1,
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PT_DYNAMIC = 2,
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PT_INTERP = 3,
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PT_NOTE = 4,
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PT_SHLIB = 5,
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PT_PHDR = 6,
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PT_TLS = 7,
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PT_LOSUNW = 0x6ffffffa,
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PT_SUNWBSS = 0x6ffffffb,
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PT_SUNWSTACK = 0x6ffffffa,
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PT_HISUNW = 0x6fffffff,
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PT_LOPROC = 0x70000000,
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PT_HIPROC = 0x7fffffff
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};
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/* https://docs.oracle.com/cd/E19683-01/817-3677/chapter6-42444/index.html */
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enum DynamicArrayTags
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{
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DT_NULL = 0,
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DT_NEEDED = 1,
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DT_PLTRELSZ = 2,
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DT_PLTGOT = 3,
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DT_HASH = 4,
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DT_STRTAB = 5,
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DT_SYMTAB = 6,
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DT_RELA = 7,
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DT_RELASZ = 8,
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DT_RELAENT = 9,
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DT_STRSZ = 10,
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DT_SYMENT = 11,
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DT_INIT = 12,
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DT_FINI = 13,
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DT_SONAME = 14,
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DT_RPATH = 15,
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DT_SYMBOLIC = 16,
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DT_REL = 17,
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DT_RELSZ = 18,
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DT_RELENT = 19,
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DT_PLTREL = 20,
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DT_DEBUG = 21,
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DT_TEXTREL = 22,
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DT_JMPREL = 23,
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DT_BIND_NOW = 24,
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DT_INIT_ARRAY = 25,
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DT_FINI_ARRAY = 26,
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DT_INIT_ARRAYSZ = 27,
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DT_FINI_ARRAYSZ = 28,
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DT_RUNPATH = 29,
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DT_FLAGS = 30,
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DT_ENCODING = 32,
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DT_PREINIT_ARRAY = 32,
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DT_PREINIT_ARRAYSZ = 33,
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DT_LOOS = 0x6000000d,
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DT_SUNW_RTLDINF = 0x6000000e,
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DT_HIOS = 0x6ffff000,
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DT_VALRNGLO = 0x6ffffd00,
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DT_CHECKSUM = 0x6ffffdf8,
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DT_PLTPADSZ = 0x6ffffdf9,
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DT_MOVEENT = 0x6ffffdfa,
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DT_MOVESZ = 0x6ffffdfb,
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DT_FEATURE_1 = 0x6ffffdfc,
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DT_POSFLAG_1 = 0x6ffffdfd,
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DT_SYMINSZ = 0x6ffffdfe,
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DT_SYMINENT = 0x6ffffdff,
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DT_VALRNGHI = 0x6ffffdff,
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DT_ADDRRNGLO = 0x6ffffe00,
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DT_CONFIG = 0x6ffffefa,
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DT_DEPAUDIT = 0x6ffffefb,
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DT_AUDIT = 0x6ffffefc,
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DT_PLTPAD = 0x6ffffefd,
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DT_MOVETAB = 0x6ffffefe,
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DT_SYMINFO = 0x6ffffeff,
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DT_ADDRRNGHI = 0x6ffffeff,
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DT_RELACOUNT = 0x6ffffff9,
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DT_RELCOUNT = 0x6ffffffa,
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DT_FLAGS_1 = 0x6ffffffb,
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DT_VERDEF = 0x6ffffffc,
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DT_VERDEFNUM = 0x6ffffffd,
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DT_VERNEED = 0x6ffffffe,
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DT_VERNEEDNUM = 0x6fffffff,
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DT_LOPROC = 0x70000000,
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DT_SPARC_REGISTER = 0x70000001,
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DT_AUXILIARY = 0x7ffffffd,
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DT_USED = 0x7ffffffe,
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DT_FILTER = 0x7fffffff,
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DT_HIPROC = 0x7fffffff
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};
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// used for Elf64_Sym st_info
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#define ELF32_ST_BIND(info) ((info) >> 4)
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#define ELF32_ST_TYPE(info) ((info)&0xf)
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#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type)&0xf))
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#define ELF64_ST_BIND(info) ((info) >> 4)
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#define ELF64_ST_TYPE(info) ((info)&0xf)
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#define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type)&0xf))
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// used for Elf64_Sym st_other
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#define ELF32_ST_VISIBILITY(o) ((o)&0x3)
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#define ELF64_ST_VISIBILITY(o) ((o)&0x3)
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#define DO_386_32(S, A) ((S) + (A))
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#define DO_386_PC32(S, A, P) ((S) + (A) - (P))
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#define DO_64_64(S, A) ((S) + (A))
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#define DO_64_PC32(S, A, P) ((S) + (A) - (P))
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#define ELF32_R_SYM(i) ((i) >> 8)
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#define ELF32_R_TYPE(i) ((unsigned char)(i))
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#define ELF32_R_INFO(s, t) (((s) << 8) + (unsigned char)(t))
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#define ELF64_R_SYM(i) ((i) >> 32)
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#define ELF64_R_TYPE(i) ((i)&0xffffffffL)
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#define ELF64_R_INFO(s, t) (((s) << 32) + ((t)&0xffffffffL))
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#define SHN_UNDEF 0
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#define SHN_ABS 0xfff1
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#define SHT_NOBITS 8
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#define SHT_REL 9
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#define SHF_WRITE 0x1
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#define SHF_ALLOC 0x2
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#define EM_386 0x3 // x86 Machine Type
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#define EM_X86_64 0x3E // 64bit
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#define EM_ARM 0x28 // ARM
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#define EM_AARCH64 0xb7 // ARM64
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#define EV_CURRENT 0x1 // ELF Current Version
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#define ELFMAG0 0x7F // e_ident[EI_MAG0]
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#define ELFMAG1 'E' // e_ident[EI_MAG1]
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#define ELFMAG2 'L' // e_ident[EI_MAG2]
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#define ELFMAG3 'F' // e_ident[EI_MAG3]
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#define ELFDATANONE 0 /* e_ident[EI_DATA] */
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#define ELFDATA2LSB 1
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#define ELFDATA2MSB 2
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#define ELFCLASSNONE 0 /* EI_CLASS */
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#define ELFCLASS32 1
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#define ELFCLASS64 2
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#define ELFCLASSNUM 3
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#define SHT_NULL 0 /* Section header table entry unused */
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#define SHT_PROGBITS 1 /* Program data */
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#define SHT_SYMTAB 2 /* Symbol table */
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#define SHT_STRTAB 3 /* String table */
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#define SHT_RELA 4 /* Relocation entries with addends */
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#define SHT_HASH 5 /* Symbol hash table */
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#define SHT_DYNAMIC 6 /* Dynamic linking information */
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#define SHT_NOTE 7 /* Notes */
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#define SHT_NOBITS 8 /* Program space with no data (bss) */
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#define SHT_REL 9 /* Relocation entries, no addends */
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#define SHT_SHLIB 10 /* Reserved */
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#define SHT_DYNSYM 11 /* Dynamic linker symbol table */
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#define SHT_INIT_ARRAY 14 /* Array of constructors */
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#define SHT_FINI_ARRAY 15 /* Array of destructors */
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#define SHT_PREINIT_ARRAY 16 /* Array of pre-constructors */
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#define SHT_GROUP 17 /* Section group */
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#define SHT_SYMTAB_SHNDX 18 /* Extended section indeces */
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#define SHT_NUM 19 /* Number of defined types. */
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#define SHT_LOOS 0x60000000 /* Start OS-specific. */
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#define SHT_GNU_ATTRIBUTES 0x6ffffff5 /* Object attributes. */
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#define SHT_GNU_HASH 0x6ffffff6 /* GNU-style hash table. */
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#define SHT_GNU_LIBLIST 0x6ffffff7 /* Prelink library list */
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#define SHT_CHECKSUM 0x6ffffff8 /* Checksum for DSO content. */
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#define SHT_LOSUNW 0x6ffffffa /* Sun-specific low bound. */
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#define SHT_SUNW_move 0x6ffffffa
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#define SHT_SUNW_COMDAT 0x6ffffffb
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#define SHT_SUNW_syminfo 0x6ffffffc
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#define SHT_GNU_verdef 0x6ffffffd /* Version definition section. */
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#define SHT_GNU_verneed 0x6ffffffe /* Version needs section. */
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#define SHT_GNU_versym 0x6fffffff /* Version symbol table. */
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#define SHT_HISUNW 0x6fffffff /* Sun-specific high bound. */
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#define SHT_HIOS 0x6fffffff /* End OS-specific type */
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#define SHT_LOPROC 0x70000000 /* Start of processor-specific */
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#define SHT_HIPROC 0x7fffffff /* End of processor-specific */
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#define SHT_LOUSER 0x80000000 /* Start of application-specific */
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#define SHT_HIUSER 0x8fffffff /* End of application-specific */
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#endif // !__FENNIX_KERNEL_ELF_H__
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