265 lines
7.1 KiB
C
265 lines
7.1 KiB
C
/*
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* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
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* RWTH Aachen University
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of MetalSVM.
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*/
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/**
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* @author Stefan Lankes
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* @file arch/x86/include/asm/elf.h
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* @brief Define constants and structures related to ELF
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*
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* This file keeps define constants for identification and definition of ELF files.\n
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* ELF files consist of up to five parts:
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* - ELF header
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* - program header table
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* - section header table
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* - ELF sections
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* - ELF segment
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*/
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#ifndef __ELF_H__
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#define __ELF_H__
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#include <metalsvm/config.h>
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#include <asm/stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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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 ELF_MAGIC 0x464C457F
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#define ELF_ET_NONE 0x0000 // no type
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#define ELF_ET_REL 0x0001 // relocatable
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#define ELF_ET_EXEC 0x0002 // executeable
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#define ELF_ET_DYN 0x0003 // Shared-Object-File
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#define ELF_ET_CORE 0x0004 // Corefile
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#define ELF_ET_LOPROC 0xFF00 // Processor-specific
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#define ELF_ET_HIPROC 0x00FF // Processor-specific
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#define ELF_EM_NONE 0x0000 // no type
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#define ELF_EM_M32 0x0001 // AT&T WE 32100
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#define ELF_EM_SPARC 0x0002 // SPARC
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#define ELF_EM_386 0x0003 // Intel 80386
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#define ELF_EM_68K 0x0004 // Motorola 68000
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#define ELF_EM_88K 0x0005 // Motorola 88000
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#define ELF_EM_860 0x0007 // Intel 80860
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#define ELF_EM_MIPS 0x0008 // MIPS RS3000
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#define ELF_EM_ARM 0x0032 // ARM
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#define ELF_EM_X86_64 0x003E // AMD/Intel x86_64
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#define ELF_CLASS_NONE 0x0000
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#define ELF_CLASS_32 0x0001 // 32bit file
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#define ELF_CLASS_64 0x0002 // 64bit file
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#define ELF_DATA_NONE 0x0000
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#define ELF_DATA_2LSB 0x0001
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#define ELF_DATA_2MSB 0x002
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/* Legal values for p_type (segment type). */
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#define ELF_PT_NULL 0 /* Program header table entry unused */
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#define ELF_PT_LOAD 1 /* Loadable program segment */
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#define ELF_PT_DYNAMIC 2 /* Dynamic linking information */
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#define ELF_PT_INTERP 3 /* Program interpreter */
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#define ELF_PT_NOTE 4 /* Auxiliary information */
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#define ELF_PT_SHLIB 5
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#define ELF_PT_PHDR 6 /* Entry for header table itself */
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#define ELF_PT_TLS 7 /* Thread-local storage segment */
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#define ELF_PT_NUM 8 /* Number of defined types */
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#define ELF_PT_LOOS 0x60000000 /* Start of OS-specific */
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#define ELF_PT_GNU_EH_FRAME 0x6474e550 /* GCC .eh_frame_hdr segment */
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#define ELF_PT_GNU_STACK 0x6474e551 /* Indicates stack executability */
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#define ELF_PT_GNU_RELRO 0x6474e552 /* Read-only after relocation */
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#define ELF_PT_LOSUNW 0x6ffffffa
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#define ELF_PT_SUNWBSS 0x6ffffffa /* Sun Specific segment */
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#define ELF_PT_SUNWSTACK 0x6ffffffb /* Stack segment */
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#define ELF_PT_HISUNW 0x6fffffff
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#define ELF_PT_HIOS 0x6fffffff /* End of OS-specific */
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#define ELF_PT_LOPROC 0x70000000 /* Start of processor-specific */
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#define ELF_PT_HIPROC 0x7fffffff /* End of processor-specific */
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/* These constants define the permissions on sections in the program
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header, p_flags. */
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#define PF_R 0x4
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#define PF_W 0x2
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#define PF_X 0x1
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/** @brief Identification part of an ELF-file's header
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*
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* This structure keeps information about the file format
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*/
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typedef struct {
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uint32_t magic;
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uint8_t _class;
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uint8_t data;
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uint8_t version;
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uint8_t pad[8];
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uint8_t nident;
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} __attribute__ ((packed)) elf_ident_t;
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/** @brief Information about the executable
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*
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* ELF32 header\n
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* This structure keeps information about the format of the executable itself.
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*/
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typedef struct {
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elf_ident_t ident;
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Elf32_Half type;
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Elf32_Half machine;
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Elf32_Word version;
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Elf32_Addr entry;
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Elf32_Off ph_offset;
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Elf32_Off sh_offset;
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Elf32_Word flags;
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Elf32_Half header_size;
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Elf32_Half ph_entry_size;
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Elf32_Half ph_entry_count;
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Elf32_Half sh_entry_size;
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Elf32_Half sh_entry_count;
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Elf32_Half sh_str_table_index;
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} __attribute__ ((packed)) elf32_header_t;
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/** @brief Information about the executable
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*
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* ELF64 header\n
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* This structure keeps information about the format of the executable itself.
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*/
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typedef struct {
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elf_ident_t ident;
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Elf64_Half type;
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Elf64_Half machine;
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Elf64_Word version;
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Elf64_Addr entry;
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Elf64_Off ph_offset;
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Elf64_Off sh_offset;
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Elf64_Word flags;
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Elf64_Half header_size;
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Elf64_Half ph_entry_size;
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Elf64_Half ph_entry_count;
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Elf64_Half sh_entry_size;
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Elf64_Half sh_entry_count;
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Elf64_Half sh_str_table_index;
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} __attribute__ ((packed)) elf64_header_t;
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#ifdef CONFIG_X86_32
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typedef elf32_header_t elf_header_t;
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#else
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typedef elf64_header_t elf_header_t;
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#endif
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/** @brief ELF32 program header information
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*
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* ELF32 program header table\n
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* This structure keeps information about the program header.
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*/
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typedef struct {
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Elf32_Word type;
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Elf32_Off offset;
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Elf32_Addr virt_addr;
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Elf32_Addr phys_addr;
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Elf32_Word file_size;
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Elf32_Word mem_size;
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Elf32_Word flags;
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Elf32_Word alignment;
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} __attribute__ ((packed)) elf32_program_header_t;
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/** @brief ELF64 program header information
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*
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* ELF64 program header table\n
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* This structure keeps information about the program header.
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*/
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typedef struct
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{
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Elf64_Word type;
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Elf64_Word flags;
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Elf64_Off offset;
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Elf64_Addr virt_addr;
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Elf64_Addr phys_addr;
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Elf64_Xword file_size;
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Elf64_Xword mem_size;
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Elf64_Xword alignment;
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} __attribute__ ((packed)) elf64_program_header_t;
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#ifdef CONFIG_X86_32
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typedef elf32_program_header_t elf_program_header_t;
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#else
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typedef elf64_program_header_t elf_program_header_t;
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#endif
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/** @brief Information about ELF32 section
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*
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* ELF32 section\n
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* This structure keeps information about a specific ELF section
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*/
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typedef struct {
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Elf32_Word name;
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Elf32_Word type;
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Elf32_Word flags;
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Elf32_Addr addr;
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Elf32_Off offset;
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Elf32_Word size;
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Elf32_Word link;
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Elf32_Word info;
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Elf32_Word align;
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Elf32_Word enttry_size;
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} __attribute__ ((packed)) elf32_section_header_t;
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/** @brief Information about ELF64 section
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*
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* ELF32 section\n
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* This structure keeps information about a specific ELF section
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*/
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typedef struct {
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Elf64_Word name;
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Elf64_Word type;
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Elf64_Xword flags;
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Elf64_Addr addr;
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Elf64_Off offset;
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Elf64_Xword size;
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Elf64_Word link;
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Elf64_Word info;
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Elf64_Xword align;
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Elf64_Xword enttry_size;
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} __attribute__ ((packed)) elf64_section_header_t;
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#ifdef CONFIG_X86_32
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typedef elf32_section_header_t elf_section_header_t;
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#else
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typedef elf64_section_header_t elf_section_header_t;
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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