text: /* ELF support for BFD.
     Copyright (C) 1991-2015 Free Software Foundation, Inc.
  
     Written by Fred Fish @ Cygnus Support, from information published
     in "UNIX System V Release 4, Programmers Guide: ANSI C and
     Programming Support Tools".
  
     This file is part of BFD, the Binary File Descriptor library.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program 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 General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
     MA 02110-1301, USA.  */
  
  /* This file is part of ELF support for BFD, and contains the portions
     that describe how ELF is represented externally by the BFD library.
     I.E. it describes the in-file representation of ELF.  It requires
     the elf/common.h file which contains the portions that are common to
     both the internal and external representations.  */
  
  /* The 64-bit stuff is kind of random.  Perhaps someone will publish a
     spec someday.  */
  
  #ifndef _ELF_EXTERNAL_H
  #define _ELF_EXTERNAL_H
  
  /* Special section indices, which may show up in st_shndx fields, among
     other places.  */
  
  #define SHN_LORESERVE	0xFF00		/* Begin range of reserved indices */
  #define SHN_LOPROC	0xFF00		/* Begin range of appl-specific */
  #define SHN_HIPROC	0xFF1F		/* End range of appl-specific */
  #define SHN_LOOS	0xFF20		/* OS specific semantics, lo */
  #define SHN_HIOS	0xFF3F		/* OS specific semantics, hi */
  #define SHN_ABS		0xFFF1		/* Associated symbol is absolute */
  #define SHN_COMMON	0xFFF2		/* Associated symbol is in common */
  #define SHN_XINDEX	0xFFFF		/* Section index is held elsewhere */
  #define SHN_HIRESERVE	0xFFFF		/* End range of reserved indices */
  
  /* ELF Header (32-bit implementations) */
  
  typedef struct {
    unsigned char	e_ident[16];		/* ELF "magic number" */
    unsigned char	e_type[2];		/* Identifies object file type */
    unsigned char	e_machine[2];		/* Specifies required architecture */
    unsigned char	e_version[4];		/* Identifies object file version */
    unsigned char	e_entry[4];		/* Entry point virtual address */
    unsigned char	e_phoff[4];		/* Program header table file offset */
    unsigned char	e_shoff[4];		/* Section header table file offset */
    unsigned char	e_flags[4];		/* Processor-specific flags */
    unsigned char	e_ehsize[2];		/* ELF header size in bytes */
    unsigned char	e_phentsize[2];		/* Program header table entry size */
    unsigned char	e_phnum[2];		/* Program header table entry count */
    unsigned char	e_shentsize[2];		/* Section header table entry size */
    unsigned char	e_shnum[2];		/* Section header table entry count */
    unsigned char	e_shstrndx[2];		/* Section header string table index */
  } Elf32_External_Ehdr;
  
  typedef struct {
    unsigned char	e_ident[16];		/* ELF "magic number" */
    unsigned char	e_type[2];		/* Identifies object file type */
    unsigned char	e_machine[2];		/* Specifies required architecture */
    unsigned char	e_version[4];		/* Identifies object file version */
    unsigned char	e_entry[8];		/* Entry point virtual address */
    unsigned char	e_phoff[8];		/* Program header table file offset */
    unsigned char	e_shoff[8];		/* Section header table file offset */
    unsigned char	e_flags[4];		/* Processor-specific flags */
    unsigned char	e_ehsize[2];		/* ELF header size in bytes */
    unsigned char	e_phentsize[2];		/* Program header table entry size */
    unsigned char	e_phnum[2];		/* Program header table entry count */
    unsigned char	e_shentsize[2];		/* Section header table entry size */
    unsigned char	e_shnum[2];		/* Section header table entry count */
    unsigned char	e_shstrndx[2];		/* Section header string table index */
  } Elf64_External_Ehdr;
  
  /* Program header */
  
  typedef struct {
    unsigned char	p_type[4];		/* Identifies program segment type */
    unsigned char	p_offset[4];		/* Segment file offset */
    unsigned char	p_vaddr[4];		/* Segment virtual address */
    unsigned char	p_paddr[4];		/* Segment physical address */
    unsigned char	p_filesz[4];		/* Segment size in file */
    unsigned char	p_memsz[4];		/* Segment size in memory */
    unsigned char	p_flags[4];		/* Segment flags */
    unsigned char	p_align[4];		/* Segment alignment, file & memory */
  } Elf32_External_Phdr;
  
  typedef struct {
    unsigned char	p_type[4];		/* Identifies program segment type */
    unsigned char	p_flags[4];		/* Segment flags */
    unsigned char	p_offset[8];		/* Segment file offset */
    unsigned char	p_vaddr[8];		/* Segment virtual address */
    unsigned char	p_paddr[8];		/* Segment physical address */
    unsigned char	p_filesz[8];		/* Segment size in file */
    unsigned char	p_memsz[8];		/* Segment size in memory */
    unsigned char	p_align[8];		/* Segment alignment, file & memory */
  } Elf64_External_Phdr;
  
  /* Section header */
  
  typedef struct {
    unsigned char	sh_name[4];		/* Section name, index in string tbl */
    unsigned char	sh_type[4];		/* Type of section */
    unsigned char	sh_flags[4];		/* Miscellaneous section attributes */
    unsigned char	sh_addr[4];		/* Section virtual addr at execution */
    unsigned char	sh_offset[4];		/* Section file offset */
    unsigned char	sh_size[4];		/* Size of section in bytes */
    unsigned char	sh_link[4];		/* Index of another section */
    unsigned char	sh_info[4];		/* Additional section information */
    unsigned char	sh_addralign[4];	/* Section alignment */
    unsigned char	sh_entsize[4];		/* Entry size if section holds table */
  } Elf32_External_Shdr;
  
  typedef struct {
    unsigned char	sh_name[4];		/* Section name, index in string tbl */
    unsigned char	sh_type[4];		/* Type of section */
    unsigned char	sh_flags[8];		/* Miscellaneous section attributes */
    unsigned char	sh_addr[8];		/* Section virtual addr at execution */
    unsigned char	sh_offset[8];		/* Section file offset */
    unsigned char	sh_size[8];		/* Size of section in bytes */
    unsigned char	sh_link[4];		/* Index of another section */
    unsigned char	sh_info[4];		/* Additional section information */
    unsigned char	sh_addralign[8];	/* Section alignment */
    unsigned char	sh_entsize[8];		/* Entry size if section holds table */
  } Elf64_External_Shdr;
  
  /* Symbol table entry */
  
  typedef struct {
    unsigned char	st_name[4];		/* Symbol name, index in string tbl */
    unsigned char	st_value[4];		/* Value of the symbol */
    unsigned char	st_size[4];		/* Associated symbol size */
    unsigned char	st_info[1];		/* Type and binding attributes */
    unsigned char	st_other[1];		/* No defined meaning, 0 */
    unsigned char	st_shndx[2];		/* Associated section index */
  } Elf32_External_Sym;
  
  typedef struct {
    unsigned char	st_name[4];		/* Symbol name, index in string tbl */
    unsigned char	st_info[1];		/* Type and binding attributes */
    unsigned char	st_other[1];		/* No defined meaning, 0 */
    unsigned char	st_shndx[2];		/* Associated section index */
    unsigned char	st_value[8];		/* Value of the symbol */
    unsigned char	st_size[8];		/* Associated symbol size */
  } Elf64_External_Sym;
  
  typedef struct {
    unsigned char est_shndx[4];		/* Section index */
  } Elf_External_Sym_Shndx;
  
  /* Note segments */
  
  typedef struct {
    unsigned char	namesz[4];		/* Size of entry's owner string */
    unsigned char	descsz[4];		/* Size of the note descriptor */
    unsigned char	type[4];		/* Interpretation of the descriptor */
    char		name[1];		/* Start of the name+desc data */
  } Elf_External_Note;
  
  /* Relocation Entries */
  typedef struct {
    unsigned char r_offset[4];	/* Location at which to apply the action */
    unsigned char	r_info[4];	/* index and type of relocation */
  } Elf32_External_Rel;
  
  typedef struct {
    unsigned char r_offset[4];	/* Location at which to apply the action */
    unsigned char	r_info[4];	/* index and type of relocation */
    unsigned char	r_addend[4];	/* Constant addend used to compute value */
  } Elf32_External_Rela;
  
  typedef struct {
    unsigned char r_offset[8];	/* Location at which to apply the action */
    unsigned char	r_info[8];	/* index and type of relocation */
  } Elf64_External_Rel;
  
  typedef struct {
    unsigned char r_offset[8];	/* Location at which to apply the action */
    unsigned char	r_info[8];	/* index and type of relocation */
    unsigned char	r_addend[8];	/* Constant addend used to compute value */
  } Elf64_External_Rela;
  
  /* dynamic section structure */
  
  typedef struct {
    unsigned char	d_tag[4];		/* entry tag value */
    union {
      unsigned char	d_val[4];
      unsigned char	d_ptr[4];
    } d_un;
  } Elf32_External_Dyn;
  
  typedef struct {
    unsigned char	d_tag[8];		/* entry tag value */
    union {
      unsigned char	d_val[8];
      unsigned char	d_ptr[8];
    } d_un;
  } Elf64_External_Dyn;
  
  /* The version structures are currently size independent.  They are
     named without a 32 or 64.  If that ever changes, these structures
     will need to be renamed.  */
  
  /* This structure appears in a SHT_GNU_verdef section.  */
  
  typedef struct {
    unsigned char		vd_version[2];
    unsigned char		vd_flags[2];
    unsigned char		vd_ndx[2];
    unsigned char		vd_cnt[2];
    unsigned char		vd_hash[4];
    unsigned char		vd_aux[4];
    unsigned char		vd_next[4];
  } Elf_External_Verdef;
  
  /* This structure appears in a SHT_GNU_verdef section.  */
  
  typedef struct {
    unsigned char		vda_name[4];
    unsigned char		vda_next[4];
  } Elf_External_Verdaux;
  
  /* This structure appears in a SHT_GNU_verneed section.  */
  
  typedef struct {
    unsigned char		vn_version[2];
    unsigned char		vn_cnt[2];
    unsigned char		vn_file[4];
    unsigned char		vn_aux[4];
    unsigned char		vn_next[4];
  } Elf_External_Verneed;
  
  /* This structure appears in a SHT_GNU_verneed section.  */
  
  typedef struct {
    unsigned char		vna_hash[4];
    unsigned char		vna_flags[2];
    unsigned char		vna_other[2];
    unsigned char		vna_name[4];
    unsigned char		vna_next[4];
  } Elf_External_Vernaux;
  
  /* This structure appears in a SHT_GNU_versym section.  This is not a
     standard ELF structure; ELF just uses Elf32_Half.  */
  
  typedef struct {
    unsigned char		vs_vers[2];
  } ATTRIBUTE_PACKED  Elf_External_Versym;
  
  /* Structure for syminfo section.  */
  typedef struct
  {
    unsigned char		si_boundto[2];
    unsigned char		si_flags[2];
  } Elf_External_Syminfo;
  
  
  /* This structure appears on the stack and in NT_AUXV core file notes.  */
  typedef struct
  {
    unsigned char		a_type[4];
    unsigned char		a_val[4];
  } Elf32_External_Auxv;
  
  typedef struct
  {
    unsigned char		a_type[8];
    unsigned char		a_val[8];
  } Elf64_External_Auxv;
  
  /* Size of SHT_GROUP section entry.  */
  
  #define GRP_ENTRY_SIZE		4
  
  #endif /* _ELF_EXTERNAL_H */
  