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#ifndef CYGONCE_LOADER_ELF_H

#define CYGONCE_LOADER_ELF_H

//==========================================================================

//

//      elf.h

//

//      ELF file format definitions

//

//==========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####                                            

// -------------------------------------------                              

// This file is part of eCos, the Embedded Configurable Operating System.   

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// eCos 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 2 or (at your option) any later      

// version.                                                                 

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,    

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            

//

// As a special exception, if other files instantiate templates or use      

// macros or inline functions from this file, or you compile this file      

// and link it with other works to produce a work based on this file,       

// this file does not by itself cause the resulting work to be covered by   

// the GNU General Public License. However the source code for this file    

// must still be made available in accordance with section (3) of the GNU   

// General Public License v2.                                               

//

// This exception does not invalidate any other reasons why a work based    

// on this file might be covered by the GNU General Public License.         

// -------------------------------------------                              

// ####ECOSGPLCOPYRIGHTEND####                                              

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):           nickg

// Contributors:        nickg

// Date:                2000-11-15

// Purpose:             Define ELF file format

// Description:         The types defined here describe the ELF file format.

//              

// Usage:       #include <cyg/loader/elf.h>

//

//####DESCRIPTIONEND####

//

//==========================================================================

//

// Quite a lot of this file was taken from the BSD exec_elf.h header file.

// Hence we should show you this...

//

/*      $OpenBSD: exec_elf.h,v 1.20 1999/09/19 16:16:49 kstailey Exp $  */

/*

 * Copyright (c) 1995, 1996 Erik Theisen.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. 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.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.

 */

//==========================================================================

#include <cyg/infra/cyg_type.h>

// -------------------------------------------------------------------------

// Basic types:

typedef cyg_uint32 Elf32_Addr;

typedef cyg_uint32 Elf32_Off;

typedef cyg_uint16 Elf32_Half;

typedef cyg_uint32 Elf32_Word;

typedef cyg_int32  Elf32_Sword;

typedef cyg_uint64 Elf64_Addr;

typedef cyg_uint64 Elf64_Off;

typedef cyg_uint16 Elf64_Half;

typedef cyg_uint32 Elf64_Word;

typedef cyg_int32  Elf64_Sword;

typedef cyg_uint64 Elf64_Xword;

typedef cyg_int64  Elf64_Sxword;

// -------------------------------------------------------------------------

// ELF header

#define EI_NIDENT 16

typedef struct {

    unsigned char   e_ident[EI_NIDENT];

    Elf32_Half      e_type;

    Elf32_Half      e_machine;

    Elf32_Word      e_version;

    Elf32_Addr      e_entry;

    Elf32_Off       e_phoff;

    Elf32_Off       e_shoff;

    Elf32_Word      e_flags;

    Elf32_Half      e_ehsize;

    Elf32_Half      e_phentsize;

    Elf32_Half      e_phnum;

    Elf32_Half      e_shentsize;

    Elf32_Half      e_shnum;

    Elf32_Half      e_shtrndx;

} Elf32_Ehdr;

typedef struct {

    unsigned char   e_ident[EI_NIDENT];

    Elf64_Half      e_type;

    Elf64_Half      e_machine;

    Elf64_Word      e_version;

    Elf64_Addr      e_entry;

    Elf64_Off       e_phoff;

    Elf64_Off       e_shoff;

    Elf64_Word      e_flags;

    Elf64_Half      e_ehsize;

    Elf64_Half      e_phentsize;

    Elf64_Half      e_phnum;

    Elf64_Half      e_shentsize;

    Elf64_Half      e_shnum;

    Elf64_Half      e_shtrndx;

} Elf64_Ehdr;

// -------------------------------------------------------------------------

/* e_ident[] identification indexes */

#define EI_MAG0         0               /* file ID */

#define EI_MAG1         1               /* file ID */

#define EI_MAG2         2               /* file ID */

#define EI_MAG3         3               /* file ID */

#define EI_CLASS        4               /* file class */

#define EI_DATA         5               /* data encoding */

#define EI_VERSION      6               /* ELF header version */

#define EI_OSABI        7               /* Operating system/ABI identification */

#define EI_ABIVERSION   8               /* ABI version */

#define EI_PAD          9               /* start of pad bytes */

// -------------------------------------------------------------------------

/* e_ident[] magic number */

#define ELFMAG0         0x7f            /* e_ident[EI_MAG0] */

#define ELFMAG1         'E'             /* e_ident[EI_MAG1] */

#define ELFMAG2         'L'             /* e_ident[EI_MAG2] */

#define ELFMAG3         'F'             /* e_ident[EI_MAG3] */

#define ELFMAG          "\177ELF"       /* magic */

#define SELFMAG         4               /* size of magic */

// -------------------------------------------------------------------------

/* e_ident[] file class */

#define ELFCLASSNONE    0               /* invalid */

#define ELFCLASS32      1               /* 32-bit objs */

#define ELFCLASS64      2               /* 64-bit objs */

#define ELFCLASSNUM     3               /* number of classes */

// -------------------------------------------------------------------------

/* e_ident[] data encoding */

#define ELFDATANONE     0               /* invalid */

#define ELFDATA2LSB     1               /* Little-Endian */

#define ELFDATA2MSB     2               /* Big-Endian */

#define ELFDATANUM      3               /* number of data encode defines */

// -------------------------------------------------------------------------

/* e_ident */

#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \

                      (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \

                      (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \

                      (ehdr).e_ident[EI_MAG3] == ELFMAG3)

// -------------------------------------------------------------------------

/* e_type */

#define ET_NONE         0               /* No file type */

#define ET_REL          1               /* relocatable file */

#define ET_EXEC         2               /* executable file */

#define ET_DYN          3               /* shared object file */

#define ET_CORE         4               /* core file */

#define ET_NUM          5               /* number of types */

#define ET_LOOS         0xfe00          /* Operating system-specific */

#define ET_HIOS         0xfeff          /* Operating system-specific */

#define ET_LOPROC       0xff00          /* reserved range for processor */

#define ET_HIPROC       0xffff          /*  specific e_type */

// -------------------------------------------------------------------------

/* e_machine */

// The following values taken from 22 June 2000 SysV ABI spec, updated with

// extra values from binutils elf/common.h.

#define EM_NONE                 0       // No machine

#define EM_M32                  1       // AT&T WE 32100

#define EM_SPARC                2       // SPARC

#define EM_386                  3       // Intel 80386

#define EM_68K                  4       // Motorola 68000

#define EM_88K                  5       // Motorola 88000

#define EM_860                  7       // Intel 80860

#define EM_MIPS                 8       // MIPS I Architecture

#define EM_S370                 9       // IBM System/370 Processor

#define EM_MIPS_RS3_LE          10      // MIPS RS3000 Little-endian

#define EM_PARISC               15      // Hewlett-Packard PA-RISC

#define EM_VPP500               17      // Fujitsu VPP500

#define EM_SPARC32PLUS          18      // Enhanced instruction set SPARC

#define EM_960                  19      // Intel 80960

#define EM_PPC                  20      // PowerPC

#define EM_PPC64                21      // 64-bit PowerPC

#define EM_V800                 36      // NEC V800

#define EM_FR20                 37      // Fujitsu FR20

#define EM_RH32                 38      // TRW RH-32

#define EM_RCE                  39      // Motorola RCE

#define EM_ARM                  40      // Advanced RISC Machines ARM

#define EM_ALPHA                41      // Digital Alpha

#define EM_SH                   42      // Hitachi SH

#define EM_SPARCV9              43      // SPARC Version 9

#define EM_TRICORE              44      // Siemens Tricore embedded processor

#define EM_ARC                  45      // Argonaut RISC Core, Argonaut Technologies Inc.

#define EM_H8_300               46      // Hitachi H8/300

#define EM_H8_300H              47      // Hitachi H8/300H

#define EM_H8S                  48      // Hitachi H8S

#define EM_H8_500               49      // Hitachi H8/500

#define EM_IA_64                50      // Intel IA-64 processor architecture

#define EM_MIPS_X               51      // Stanford MIPS-X

#define EM_COLDFIRE             52      // Motorola ColdFire

#define EM_68HC12               53      // Motorola M68HC12

#define EM_MMA                  54      // Fujitsu MMA Multimedia Accelerator

#define EM_PCP                  55      // Siemens PCP

#define EM_NCPU                 56      // Sony nCPU embedded RISC processor

#define EM_NDR1                 57      // Denso NDR1 microprocessor

#define EM_STARCORE             58      // Motorola Star*Core processor

#define EM_ME16                 59      // Toyota ME16 processor

#define EM_ST100                60      // STMicroelectronics ST100 processor

#define EM_TINYJ                61      // Advanced Logic Corp. TinyJ embedded processor family

#define EM_FX66                 66      // Siemens FX66 microcontroller

#define EM_ST9PLUS              67      // STMicroelectronics ST9+ 8/16 bit microcontroller

#define EM_ST7                  68      // STMicroelectronics ST7 8-bit microcontroller

#define EM_68HC16               69      // Motorola MC68HC16 Microcontroller

#define EM_68HC11               70      // Motorola MC68HC11 Microcontroller

#define EM_68HC08               71      // Motorola MC68HC08 Microcontroller

#define EM_68HC05               72      // Motorola MC68HC05 Microcontroller

#define EM_SVX                  73      // Silicon Graphics SVx

#define EM_ST19                 74      // STMicroelectronics ST19 8-bit microcontroller

#define EM_VAX                  75      // Digital VAX

#define EM_CRIS                 76      // Axis Communications 32-bit embedded processor

#define EM_JAVELIN              77      // Infineon Technologies 32-bit embedded processor

#define EM_FIREPATH             78      // Element 14 64-bit DSP Processor

#define EM_ZSP                  79      // LSI Logic 16-bit DSP Processor

#define EM_MMIX                 80      // Donald Knuth's educational 64-bit processor

#define EM_HUANY                81      // Harvard University machine-independent object files

#define EM_PRISM                82      // SiTera Prism

/* Cygnus PowerPC ELF backend.  Written in the absence of an ABI.  */

#define EM_CYGNUS_POWERPC 0x9025

/* Old version of Sparc v9, from before the ABI; this should be

   removed shortly.  */

#define EM_OLD_SPARCV9  11

/* Old version of PowerPC, this should be removed shortly. */

#define EM_PPC_OLD      17

/* Cygnus ARC ELF backend.  Written in the absence of an ABI.  */

#define EM_CYGNUS_ARC 0x9040

/* Cygnus M32R ELF backend.  Written in the absence of an ABI.  */

#define EM_CYGNUS_M32R 0x9041

/* Alpha backend magic number.  Written in the absence of an ABI.  */

//#define EM_ALPHA        0x9026

/* D10V backend magic number.  Written in the absence of an ABI.  */

#define EM_CYGNUS_D10V  0x7650

/* D30V backend magic number.  Written in the absence of an ABI.  */

#define EM_CYGNUS_D30V  0x7676

/* V850 backend magic number.  Written in the absense of an ABI.  */

#define EM_CYGNUS_V850  0x9080

/* mn10200 and mn10300 backend magic numbers.

   Written in the absense of an ABI.  */

#define EM_CYGNUS_MN10200       0xdead

#define EM_CYGNUS_MN10300       0xbeef

/* FR30 magic number - no EABI available.  */

#define EM_CYGNUS_FR30          0x3330

/* AVR magic number

   Written in the absense of an ABI.  */

#define EM_AVR                  0x1057

// -------------------------------------------------------------------------

/* Version */

#define EV_NONE         0               /* Invalid */

#define EV_CURRENT      1               /* Current */

#define EV_NUM          2               /* number of versions */

// -------------------------------------------------------------------------

/* Section Header */

typedef struct {

    Elf32_Word  sh_name;        /* name - index into section header

                                   string table section */

    Elf32_Word  sh_type;        /* type */

    Elf32_Word  sh_flags;       /* flags */

    Elf32_Addr  sh_addr;        /* address */

    Elf32_Off   sh_offset;      /* file offset */

    Elf32_Word  sh_size;        /* section size */

    Elf32_Word  sh_link;        /* section header table index link */

    Elf32_Word  sh_info;        /* extra information */

    Elf32_Word  sh_addralign;   /* address alignment */

    Elf32_Word  sh_entsize;     /* section entry size */

} Elf32_Shdr;

typedef struct {

    Elf64_Word  sh_name;        /* section name */

    Elf64_Word  sh_type;        /* section type */

    Elf64_Xword sh_flags;       /* section flags */

    Elf64_Addr  sh_addr;        /* virtual address */

    Elf64_Off   sh_offset;      /* file offset */

    Elf64_Xword sh_size;        /* section size */

    Elf64_Word  sh_link;        /* link to another */

    Elf64_Word  sh_info;        /* misc info */

    Elf64_Xword sh_addralign;   /* memory alignment */

    Elf64_Xword sh_entsize;     /* table entry size */

} Elf64_Shdr;

// -------------------------------------------------------------------------

/* Special Section Indexes */

#define SHN_UNDEF       0               /* undefined */

#define SHN_LORESERVE   0xff00          /* lower bounds of reserved indexes */

#define SHN_LOPROC      0xff00          /* reserved range for processor */

#define SHN_HIPROC      0xff1f          /*   specific section indexes */

#define SHN_LOOS        0xff20          /* reserved range for operating */

#define SHN_HIOS        0xff3f          /*   system specific section indexes */

#define SHN_ABS         0xfff1          /* absolute value */

#define SHN_COMMON      0xfff2          /* common symbol */

#define SHN_XINDEX      0xffff          /* escape value for oversize index */

#define SHN_HIRESERVE   0xffff          /* upper bounds of reserved indexes */

// -------------------------------------------------------------------------

/* sh_type */

#define SHT_NULL        0               /* inactive */

#define SHT_PROGBITS    1               /* program defined information */

#define SHT_SYMTAB      2               /* symbol table section */

#define SHT_STRTAB      3               /* string table section */

#define SHT_RELA        4               /* relocation section with addends*/

#define SHT_HASH        5               /* symbol hash table section */

#define SHT_DYNAMIC     6               /* dynamic section */

#define SHT_NOTE        7               /* note section */

#define SHT_NOBITS      8               /* no space section */

#define SHT_REL         9               /* relation section without addends */

#define SHT_SHLIB       10              /* reserved - purpose unknown */

#define SHT_DYNSYM      11              /* dynamic symbol table section */

#define SHT_INIT_ARRAY  14              /* init procedure array */

#define SHT_FINI_ARRAY  15              /* fini procedure array */

#define SHT_PREINIT_ARRAY 16            /* preinit procedure array */

#define SHT_GROUP       17              /* section group */

#define SHT_SYMTAB_SHNDX 18             /* oversize index table */

#define SHT_NUM         19              /* number of section types */

#define SHT_LOOS        0x60000000      /* reserved range for O/S */

#define SHT_HIOS        0x6fffffff      /*  specific section header types */

#define SHT_LOPROC      0x70000000      /* reserved range for processor */

#define SHT_HIPROC      0x7fffffff      /*  specific section header types */

#define SHT_LOUSER      0x80000000      /* reserved range for application */

#define SHT_HIUSER      0xffffffff      /*  specific indexes */

// -------------------------------------------------------------------------

/* Section names */

#define ELF_BSS         ".bss"          /* uninitialized data */

#define ELF_DATA        ".data"         /* initialized data */

#define ELF_DEBUG       ".debug"        /* debug */

#define ELF_DYNAMIC     ".dynamic"      /* dynamic linking information */

#define ELF_DYNSTR      ".dynstr"       /* dynamic string table */

#define ELF_DYNSYM      ".dynsym"       /* dynamic symbol table */

#define ELF_FINI        ".fini"         /* termination code */

#define ELF_GOT         ".got"          /* global offset table */

#define ELF_HASH        ".hash"         /* symbol hash table */

#define ELF_INIT        ".init"         /* initialization code */

#define ELF_REL_DATA    ".rel.data"     /* relocation data */

#define ELF_REL_FINI    ".rel.fini"     /* relocation termination code */

#define ELF_REL_INIT    ".rel.init"     /* relocation initialization code */

#define ELF_REL_DYN     ".rel.dyn"      /* relocaltion dynamic link info */

#define ELF_REL_RODATA  ".rel.rodata"   /* relocation read-only data */

#define ELF_REL_TEXT    ".rel.text"     /* relocation code */

#define ELF_RODATA      ".rodata"       /* read-only data */

#define ELF_SHSTRTAB    ".shstrtab"     /* section header string table */

#define ELF_STRTAB      ".strtab"       /* string table */

#define ELF_SYMTAB      ".symtab"       /* symbol table */

#define ELF_TEXT        ".text"         /* code */

// -------------------------------------------------------------------------

/* Section Attribute Flags - sh_flags */

#define SHF_WRITE               0x001           /* Writable */

#define SHF_ALLOC               0x002           /* occupies memory */

#define SHF_EXECINSTR           0x004           /* executable */

#define SHF_MERGE               0x010           /* merge data */

#define SHF_STRINGS             0x020           /* contains strings */

#define SHF_INFO_LINK           0x040           /* link in sh_info field */

#define SHF_LINK_ORDER          0x080           /* preserve link order */

#define SHF_OS_NONCONFORMING    0x100           /* special OS-specific */

                                                /*  processing needed */

#define SHF_GROUP               0x200           /* member of group */

#define SHF_MASKOS              0x0ff00000      /* reserved bits for OS */

                                                /*  specific section attributes */

#define SHF_MASKPROC            0xf0000000      /* reserved bits for processor */

                                                /*  specific section attributes */

// -------------------------------------------------------------------------

/* Symbol Table Entry */

typedef struct {

    Elf32_Word          st_name;        /* name - index into string table */

    Elf32_Addr          st_value;       /* symbol value */

    Elf32_Word          st_size;        /* symbol size */

    unsigned char       st_info;        /* type and binding */

    unsigned char       st_other;       /* visibility */

    Elf32_Half          st_shndx;       /* section header index */

} Elf32_Sym;

typedef struct {

    Elf64_Word          st_name;        /* Symbol name index in str table */

    unsigned char       st_info;        /* type / binding attrs */

    unsigned char       st_other;       /* visibility */

    Elf64_Half          st_shndx;       /* section index of symbol */

    Elf64_Addr          st_value;       /* value of symbol */

    Elf64_Xword          st_size;        /* size of symbol */

} Elf64_Sym;

// -------------------------------------------------------------------------

/* Symbol table index */

#define STN_UNDEF       0               /* undefined */

/* Extract symbol info - st_info */

#define ELF32_ST_BIND(x)        ((x) >> 4)

#define ELF32_ST_TYPE(x)        (((unsigned int) x) & 0xf)

#define ELF32_ST_INFO(b,t)      (((b) << 4) + ((t) & 0xf))

#define ELF64_ST_BIND(x)        ((x) >> 4)

#define ELF64_ST_TYPE(x)        (((unsigned int) x) & 0xf)

#define ELF64_ST_INFO(b,t)      (((b) << 4) + ((t) & 0xf))

#define ELF32_ST_VISIBILITY(o)  ((o)&0x3)

#define ELF64_ST_VISIBILITY(o)  ((o)&0x3)

// -------------------------------------------------------------------------

/* Symbol Binding - ELF32_ST_BIND - st_info */

#define STB_LOCAL       0               /* Local symbol */

#define STB_GLOBAL      1               /* Global symbol */

#define STB_WEAK        2               /* like global - lower precedence */

#define STB_NUM         3               /* number of symbol bindings */

#define STB_LOOS        10              /* reserved range for OS */

#define STB_HIOS        12              /*  specific symbol bindings */

#define STB_LOPROC      13              /* reserved range for processor */

#define STB_HIPROC      15              /*  specific symbol bindings */

// -------------------------------------------------------------------------

/* Symbol type - ELF32_ST_TYPE - st_info */

#define STT_NOTYPE      0               /* not specified */

#define STT_OBJECT      1               /* data object */

#define STT_FUNC        2               /* function */

#define STT_SECTION     3               /* section */

#define STT_FILE        4               /* file */

#define STT_COMMON      5               /* common block */

#define STT_NUM         6               /* number of symbol types */

#define STT_LOOS        10              /* reserved range for OS */

#define STT_HIOS        12              /*  specific symbol types */

#define STT_LOPROC      13              /* reserved range for processor */

#define STT_HIPROC      15              /*  specific symbol types */

// -------------------------------------------------------------------------

// symbol visibility in st_other

#define STV_DEFAULT     0               /* default to binding type */

#define STV_INTERNAL    1               /* processor specific */

#define STV_HIDDEN      2               /* invisible */

#define STV_PROTECTED   3               /* non-premptable */

// -------------------------------------------------------------------------

// 32 bit relocation records

/* Relocation entry with implicit addend */

typedef struct

{

        Elf32_Addr      r_offset;       /* offset of relocation */

        Elf32_Word      r_info;         /* symbol table index and type */

} Elf32_Rel;

/* Relocation entry with explicit addend */

typedef struct

{

        Elf32_Addr      r_offset;       /* offset of relocation */

        Elf32_Word      r_info;         /* symbol table index and type */

        Elf32_Sword     r_addend;

} Elf32_Rela;

/* Extract relocation info - r_info */

#define ELF32_R_SYM(i)          ((i) >> 8)

#define ELF32_R_TYPE(i)         ((unsigned char) (i))

#define ELF32_R_INFO(s,t)       (((s) << 8) + (unsigned char)(t))

// -------------------------------------------------------------------------

// 64 bit equivalents of above structures and macros.

typedef struct {

        Elf64_Addr      r_offset;       /* where to do it */

        Elf64_Xword     r_info;         /* index & type of relocation */

} Elf64_Rel;

typedef struct {

        Elf64_Addr      r_offset;       /* where to do it */

        Elf64_Xword     r_info;         /* index & type of relocation */

        Elf64_Sxword    r_addend;       /* adjustment value */

} Elf64_RelA;

#define ELF64_R_SYM(info)       ((info) >> 32)

#define ELF64_R_TYPE(info)      ((info) & 0xFFFFFFFF)

#define ELF64_R_INFO(s,t)       (((s) << 32) + (u_int32_t)(t))

// -------------------------------------------------------------------------

/* Program Header */

typedef struct {

    Elf32_Word  p_type;         /* segment type */

    Elf32_Off   p_offset;       /* segment offset */

    Elf32_Addr  p_vaddr;        /* virtual address of segment */

    Elf32_Addr  p_paddr;        /* physical address - ignored? */

    Elf32_Word  p_filesz;       /* number of bytes in file for seg. */

    Elf32_Word  p_memsz;        /* number of bytes in mem. for seg. */

    Elf32_Word  p_flags;        /* flags */

    Elf32_Word  p_align;        /* memory alignment */

} Elf32_Phdr;

typedef struct {

    Elf64_Word  p_type;         /* entry type */

    Elf64_Word  p_flags;        /* flags */

    Elf64_Off   p_offset;       /* offset */

    Elf64_Addr  p_vaddr;        /* virtual address */

    Elf64_Addr  p_paddr;        /* physical address */

    Elf64_Xword p_filesz;       /* file size */

    Elf64_Xword p_memsz;        /* memory size */

    Elf64_Xword p_align;        /* memory & file alignment */

} Elf64_Phdr;

// -------------------------------------------------------------------------

/* Segment types - p_type */

#define PT_NULL         0               /* unused */

#define PT_LOAD         1               /* loadable segment */

#define PT_DYNAMIC      2               /* dynamic linking section */

#define PT_INTERP       3               /* the RTLD */

#define PT_NOTE         4               /* auxiliary information */

#define PT_SHLIB        5               /* reserved - purpose undefined */

#define PT_PHDR         6               /* program header */

#define PT_NUM          7               /* Number of segment types */

#define PT_LOOS         0x60000000      /* reserved range for OS */

#define PT_HIOS         0x6fffffff      /*  specific segment types */

#define PT_LOPROC       0x70000000      /* reserved range for processor */

#define PT_HIPROC       0x7fffffff      /*  specific segment types */

// -------------------------------------------------------------------------

/* Segment flags - p_flags */

#define PF_X            0x1             /* Executable */

#define PF_W            0x2             /* Writable */

#define PF_R            0x4             /* Readable */

#define PF_MASKOS       0x0ff00000      /* reserved bits for OS */

                                        /*  specific segment flags */

#define PF_MASKPROC     0xf0000000      /* reserved bits for processor */

                                        /*  specific segment flags */

// -------------------------------------------------------------------------

/* Dynamic structure */

typedef struct {

    Elf32_Sword         d_tag;  /* controls meaning of d_val */

    union {

        Elf32_Word      d_val;  /* Multiple meanings - see d_tag */

        Elf32_Addr      d_ptr;  /* program virtual address */

    } d_un;

} Elf32_Dyn;

extern Elf32_Dyn        _DYNAMIC[];     /* XXX not 64-bit clean */

typedef struct {

    Elf64_Sxword        d_tag;  /* controls meaning of d_val */

    union {

        Elf64_Xword     d_val;

        Elf64_Addr      d_ptr;

    } d_un;

} Elf64_Dyn;

// -------------------------------------------------------------------------

/* Dynamic Array Tags - d_tag */

#define DT_NULL         0               /* marks end of _DYNAMIC array */

#define DT_NEEDED       1               /* string table offset of needed lib */

#define DT_PLTRELSZ     2               /* size of relocation entries in PLT */

#define DT_PLTGOT       3               /* address PLT/GOT */

#define DT_HASH         4               /* address of symbol hash table */

#define DT_STRTAB       5               /* address of string table */

#define DT_SYMTAB       6               /* address of symbol table */

#define DT_RELA         7               /* address of relocation table */

#define DT_RELASZ       8               /* size of relocation table */

#define DT_RELAENT      9               /* size of relocation entry */

#define DT_STRSZ        10              /* size of string table */

#define DT_SYMENT       11              /* size of symbol table entry */

#define DT_INIT         12              /* address of initialization func. */

#define DT_FINI         13              /* address of termination function */

#define DT_SONAME       14              /* string table offset of shared obj */

#define DT_RPATH        15              /* string table offset of library

                                           search path */

#define DT_SYMBOLIC     16              /* start sym search in shared obj. */

#define DT_REL          17              /* address of rel. tbl. w addends */

#define DT_RELSZ        18              /* size of DT_REL relocation table */

#define DT_RELENT       19              /* size of DT_REL relocation entry */

#define DT_PLTREL       20              /* PLT referenced relocation entry */

#define DT_DEBUG        21              /* bugger */

#define DT_TEXTREL      22              /* Allow rel. mod. to unwritable seg */

#define DT_JMPREL       23              /* add. of PLT's relocation entries */

#define DT_BIND_NOW     24              /* Bind now regardless of env setting */

#define DT_INIT_ARRAY   25              /* init array address */

#define DT_FINI_ARRAY   26              /* fini array address */

#define DT_INIT_ARRAYSZ 27              /* init array size */

#define DT_FINI_ARRAYSZ 28              /* fini array size */

#define DT_RUNPATH      29              /* library search path */

#define DT_FLAGS        30              /* flags */

#define DT_ENCODING     32              /* encoding rules start here */

#define DT_PREINIT_ARRAY 32             /* preinit array address */

#define DT_PREINIT_ARRAYSZ 33           /* preinit array size */

#define DT_NUM          26              /* Number used. */

#define DT_LOOS         0x60000000      /* reserved range for OS */

#define DT_HIOS         0x6fffffff      /*  specific dynamic array tags */

#define DT_LOPROC       0x70000000      /* reserved range for processor */

#define DT_HIPROC       0x7fffffff      /*  specific dynamic array tags */

// -------------------------------------------------------------------------

// Values for DT_FLAGS entry

#define DF_ORIGIN       0x1             /* Uses $ORIGIN substitution string */

#define DF_SYMBOLIC     0x2             /* search for symbols here first */

#define DF_TEXTREL      0x4             /* text may be relocatable */

#define DF_BIND_NOW     0x8             /* bind references now, dammit */

// -------------------------------------------------------------------------

/* Note Definitions */

typedef struct {

    Elf32_Word namesz;

    Elf32_Word descsz;

    Elf32_Word type;

} Elf32_Note;

typedef struct {

    Elf64_Word namesz;

    Elf64_Word descsz;

    Elf64_Word type;

} Elf64_Note;

// -------------------------------------------------------------------------

// Hash table structure

// The same structure is used by both 32 and 64 bit formats

typedef struct {

    Elf32_Word          nbucket;        /* number of buckets */

    Elf32_Word          nchain;         /* number of chains */

    /* The buckets follow this structure in memory and the chains

       follow those. */

} Elf_Hash;

// -------------------------------------------------------------------------

#endif // ifndef CYGONCE_LOADER_ELF_H

// EOF elf.h