text: /*
   * Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *    * Redistributions of source code must retain the above copyright
   *      notice, this list of conditions and the following disclaimer.
   *    * Redistributions in binary form must reproduce the above copyright
   *      notice, this list of conditions and the following disclaimer in the
   *      documentation and/or other materials provided with the distribution.
   *    * Neither the name of the University nor the names of its contributors
   *      may be used to endorse or promote products derived from this
   *      software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  /**
   *
   * This file keeps define constants for identification and definition of ELF files.\n
   * ELF files consist of up to five parts:
   * - ELF header
   * - program header table
   * - section header table
   * - ELF sections
   * - ELF segment
   */
  #ifndef __ELF_H__
  #define __ELF_H__
  
  #include <stddef.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #define ELF_MAGIC 0x464C457F
  
  #define ELF_ET_NONE	0x0000	// no type
  #define ELF_ET_REL	0x0001	// relocatable
  #define ELF_ET_EXEC	0x0002	// executeable
  #define ELF_ET_DYN	0x0003	// Shared-Object-File
  #define ELF_ET_CORE	0x0004	// Corefile
  #define ELF_ET_LOPROC	0xFF00	// Processor-specific
  #define ELF_ET_HIPROC	0x00FF	// Processor-specific
   
  #define ELF_EM_NONE	0x0000	// no type
  #define ELF_EM_M32	0x0001	// AT&T WE 32100
  #define ELF_EM_SPARC	0x0002	// SPARC
  #define ELF_EM_386	0x0003	// Intel 80386
  #define ELF_EM_68K	0x0004	// Motorola 68000
  #define ELF_EM_88K	0x0005	// Motorola 88000
  #define ELF_EM_860	0x0007	// Intel 80860
  #define ELF_EM_MIPS	0x0008	// MIPS RS3000
  #define ELF_EM_X86_64 0x003e // Intel X86_64
  
  #define ELF_CLASS_NONE	0x0000
  #define ELF_CLASS_32	0x0001	// 32bit file
  #define ELF_CLASS_64	0x0002	// 64bit file
   
  #define ELF_DATA_NONE	0x0000
  #define ELF_DATA_2LSB	0x0001
  #define ELF_DATA_2MSB	0x002
   
  /* Legal values for p_type (segment type).  */
  
  #define ELF_PT_NULL		0	/* Program header table entry unused */
  #define ELF_PT_LOAD		1	/* Loadable program segment */
  #define ELF_PT_DYNAMIC		2	/* Dynamic linking information */
  #define ELF_PT_INTERP		3	/* Program interpreter */
  #define ELF_PT_NOTE		4	/* Auxiliary information */
  #define ELF_PT_SHLIB		5
  #define ELF_PT_PHDR		6	/* Entry for header table itself */
  #define ELF_PT_TLS		7	/* Thread-local storage segment */
  #define ELF_PT_NUM		8	/* Number of defined types */
  #define ELF_PT_LOOS		0x60000000	/* Start of OS-specific */
  #define ELF_PT_GNU_EH_FRAME	0x6474e550	/* GCC .eh_frame_hdr segment */
  #define ELF_PT_GNU_STACK	0x6474e551	/* Indicates stack executability */
  #define ELF_PT_GNU_RELRO	0x6474e552	/* Read-only after relocation */
  #define ELF_PT_LOSUNW		0x6ffffffa
  #define ELF_PT_SUNWBSS		0x6ffffffa	/* Sun Specific segment */
  #define ELF_PT_SUNWSTACK	0x6ffffffb	/* Stack segment */
  #define ELF_PT_HISUNW		0x6fffffff
  #define ELF_PT_HIOS		0x6fffffff	/* End of OS-specific */
  #define ELF_PT_LOPROC		0x70000000	/* Start of processor-specific */
  #define ELF_PT_HIPROC		0x7fffffff	/* End of processor-specific */
  
  /* These constants define the permissions on sections in the program
     header, p_flags. */
  #define PF_R			0x4
  #define PF_W			0x2
  #define PF_X			0x1
  
  /** @brief Identification part of an ELF-file's header
   *
   * This structure keeps information about the file format
   */
  typedef struct {
  	uint32_t magic;
  	uint8_t _class;
  	uint8_t data;
  	uint8_t version;
  	uint8_t pad[8];
  	uint8_t nident;
  } __attribute__ ((packed)) elf_ident_t;
  
  /** @brief Information about the executable
   *
   * ELF header\n
   * This structure keeps information about the format of the executable itself.
   */
  typedef struct {
  	elf_ident_t ident;
  	uint16_t type;
  	uint16_t machine;
  	uint32_t version;
  	size_t entry;
  	size_t ph_offset;
  	size_t sh_offset;
  	uint32_t flags;
  	uint16_t header_size;
  	uint16_t ph_entry_size;
  	uint16_t ph_entry_count;
  	uint16_t sh_entry_size;
  	uint16_t sh_entry_count;
  	uint16_t sh_str_table_index;
  } __attribute__ ((packed)) elf_header_t;
  
  /** @brief program header information
   *
   * program header table\n
   * This structure keeps information about the program header.
   */
  typedef struct
  {
  	uint32_t	type;
  	uint32_t	flags;
  	uint64_t	offset;
  	uint64_t	virt_addr;
  	uint64_t	phys_addr;
  	uint64_t	file_size;
  	uint64_t	mem_size;
  	uint64_t	alignment;
  } __attribute__ ((packed)) elf_program_header_t;
  
  /** @brief Information about ELF section
   *
   * ELF section\n
   * This structure keeps information about a specific ELF section
   */
  typedef struct {
  	uint32_t name;
  	uint32_t type;
  	uint64_t flags;
  	uint64_t addr;
  	uint64_t offset;
  	uint64_t size;
  	uint32_t link;
  	uint32_t info;
  	uint64_t align;
  	uint64_t enttry_size;
  } __attribute__ ((packed)) elf_section_header_t;
  
  #ifdef __cplusplus
  }
  #endif
  #endif
  