/* This file defines standard ELF types, structures, and macros.
   Copyright (C) 1995-2023 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#ifndef _ELF_H
#define	_ELF_H 1

/* Standard ELF types.  */

#include <stdint.h>

/* Type for a 16-bit quantity.  */
typedef uint16_t Elf32_Half;

/* Types for signed and unsigned 32-bit quantities.  */
typedef uint32_t Elf32_Word;

/* Type of addresses.  */
typedef uint32_t Elf32_Addr;

/* Type of file offsets.  */
typedef uint32_t Elf32_Off;

/* The ELF file header.  This appears at the start of every ELF file.  */

#define EI_NIDENT (16)

typedef struct
{
  unsigned char	e_ident[EI_NIDENT];	/* Magic number and other info */
  Elf32_Half	e_type;			/* Object file type */
  Elf32_Half	e_machine;		/* Architecture */
  Elf32_Word	e_version;		/* Object file version */
  Elf32_Addr	e_entry;		/* Entry point virtual address */
  Elf32_Off	e_phoff;		/* Program header table file offset */
  Elf32_Off	e_shoff;		/* Section header table file offset */
  Elf32_Word	e_flags;		/* Processor-specific flags */
  Elf32_Half	e_ehsize;		/* ELF header size in bytes */
  Elf32_Half	e_phentsize;		/* Program header table entry size */
  Elf32_Half	e_phnum;		/* Program header table entry count */
  Elf32_Half	e_shentsize;		/* Section header table entry size */
  Elf32_Half	e_shnum;		/* Section header table entry count */
  Elf32_Half	e_shstrndx;		/* Section header string table index */
} Elf32_Ehdr;

/* 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.  */

#define EI_MAG0		0		/* File identification byte 0 index */
#define ELFMAG0		0x7f		/* Magic number byte 0 */

#define EI_MAG1		1		/* File identification byte 1 index */
#define ELFMAG1		'E'		/* Magic number byte 1 */

#define EI_MAG2		2		/* File identification byte 2 index */
#define ELFMAG2		'L'		/* Magic number byte 2 */

#define EI_MAG3		3		/* File identification byte 3 index */
#define ELFMAG3		'F'		/* Magic number byte 3 */

/* Conglomeration of the identification bytes, for easy testing as a word.  */
#define	ELFMAG		"\177ELF"
#define	SELFMAG		4

#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

/* Program segment header.  */

typedef struct
{
  Elf32_Word	p_type;			/* Segment type */
  Elf32_Off	p_offset;		/* Segment file offset */
  Elf32_Addr	p_vaddr;		/* Segment virtual address */
  Elf32_Addr	p_paddr;		/* Segment physical address */
  Elf32_Word	p_filesz;		/* Segment size in file */
  Elf32_Word	p_memsz;		/* Segment size in memory */
  Elf32_Word	p_flags;		/* Segment flags */
  Elf32_Word	p_align;		/* Segment alignment */
} Elf32_Phdr;

/* some elf.h defines */
#define EM_386		 3	/* Intel 80386 */
#define EM_ARM		40	/* ARM */
#define EM_X86_64	62	/* AMD x86-64 architecture */
#define EM_AARCH64	183	/* ARM AARCH64 */
#define EM_RISCV	243	/* RISC-V */

/* Legal values for p_type (segment type).  */

#define	PT_NULL		0		/* Program header table entry unused */
#define PT_LOAD		1		/* Loadable program segment */

/* rest of the file is removed by @stsp */

#endif	/* elf.h */
