elf64.h

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/*-
 * Copyright (c) 1996-1998 John D. Polstra.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD: src/sys/sys/elf64.h,v 1.10 2002/05/30 08:32:18 dfr Exp $
 */

#ifndef _SYS_ELF64_H_
#define _SYS_ELF64_H_ 1

/*
 * ELF definitions common to all 64-bit architectures.
 */

typedef ULONG64 Elf64_Addr;
typedef ULONG32 Elf64_Half;
typedef ULONG64 Elf64_Off;
typedef LONG64  Elf64_Sword;
typedef ULONG64 Elf64_Word;
typedef ULONG64 Elf64_Size;
typedef USHORT  Elf64_Quarter;

/*
 * Types of dynamic symbol hash table bucket and chain elements.
 *
 * This is inconsistent among 64 bit architectures, so a machine dependent
 * typedef is required.
 */

#ifdef _ALPHA_
typedef Elf64_Off   Elf64_Hashelt;
#else
typedef Elf64_Half  Elf64_Hashelt;
#endif

/*
 * ELF header.
 */

typedef struct {
    unsigned char   e_ident[EI_NIDENT]; /* File identification. */
    Elf64_Quarter   e_type;     /* File type. */
    Elf64_Quarter   e_machine;  /* Machine architecture. */
    Elf64_Half  e_version;  /* ELF format version. */
    Elf64_Addr  e_entry;    /* Entry point. */
    Elf64_Off   e_phoff;    /* Program header file offset. */
    Elf64_Off   e_shoff;    /* Section header file offset. */
    Elf64_Half  e_flags;    /* Architecture-specific flags. */
    Elf64_Quarter   e_ehsize;   /* Size of ELF header in bytes. */
    Elf64_Quarter   e_phentsize;    /* Size of program header entry. */
    Elf64_Quarter   e_phnum;    /* Number of program header entries. */
    Elf64_Quarter   e_shentsize;    /* Size of section header entry. */
    Elf64_Quarter   e_shnum;    /* Number of section header entries. */
    Elf64_Quarter   e_shstrndx; /* Section name strings section. */
} Elf64_Ehdr;

/*
 * Section header.
 */

typedef struct {
    Elf64_Half  sh_name;    /* Section name (index into the
                       section header string table). */
    Elf64_Half  sh_type;    /* Section type. */
    Elf64_Size  sh_flags;   /* Section flags. */
    Elf64_Addr  sh_addr;    /* Address in memory image. */
    Elf64_Off   sh_offset;  /* Offset in file. */
    Elf64_Size  sh_size;    /* Size in bytes. */
    Elf64_Half  sh_link;    /* Index of a related section. */
    Elf64_Half  sh_info;    /* Depends on section type. */
    Elf64_Size  sh_addralign;   /* Alignment in bytes. */
    Elf64_Size  sh_entsize; /* Size of each entry in section. */
} Elf64_Shdr;

/*
 * Program header.
 */

typedef struct {
    Elf64_Half  p_type;     /* Entry type. */
    Elf64_Half  p_flags;    /* Access permission flags. */
    Elf64_Off   p_offset;   /* File offset of contents. */
    Elf64_Addr  p_vaddr;    /* Virtual address in memory image. */
    Elf64_Addr  p_paddr;    /* Physical address (not used). */
    Elf64_Size  p_filesz;   /* Size of contents in file. */
    Elf64_Size  p_memsz;    /* Size of contents in memory. */
    Elf64_Size  p_align;    /* Alignment in memory and file. */
} Elf64_Phdr;

/*
 * Dynamic structure.  The ".dynamic" section contains an array of them.
 */

typedef struct {
    Elf64_Size  d_tag;      /* Entry type. */
    union {
        Elf64_Size  d_val;  /* Integer value. */
        Elf64_Addr  d_ptr;  /* Address value. */
    } d_un;
} Elf64_Dyn;

/*
 * Relocation entries.
 */

/* Relocations that don't need an addend field. */
typedef struct {
    Elf64_Addr  r_offset;   /* Location to be relocated. */
    Elf64_Size  r_info;     /* Relocation type and symbol index. */
} Elf64_Rel;

/* Relocations that need an addend field. */
typedef struct {
    Elf64_Addr  r_offset;   /* Location to be relocated. */
    Elf64_Size  r_info;     /* Relocation type and symbol index. */
    Elf64_Off   r_addend;   /* Addend. */
} Elf64_Rela;

/* Macros for accessing the fields of r_info. */
#define ELF64_R_SYM(info)   ((info) >> 32)
#define ELF64_R_TYPE(info)  ((unsigned char)(info))

/* Macro for constructing r_info from field values. */
#define ELF64_R_INFO(sym, type) (((sym) << 32) + (unsigned char)(type))

/*
 * Symbol table entries.
 */

typedef struct {
    Elf64_Half  st_name;    /* String table index of name. */
    unsigned char   st_info;    /* Type and binding information. */
    unsigned char   st_other;   /* Reserved (not used). */
    Elf64_Quarter   st_shndx;   /* Section index of symbol. */
    Elf64_Addr  st_value;   /* Symbol value. */
    Elf64_Size  st_size;    /* Size of associated object. */
} Elf64_Sym;

/* Macros for accessing the fields of st_info. */
#define ELF64_ST_BIND(info)     ((info) >> 4)
#define ELF64_ST_TYPE(info)     ((info) & 0xf)

/* Macro for constructing st_info from field values. */
#define ELF64_ST_INFO(bind, type)   (((bind) << 4) + ((type) & 0xf))

#endif /* !_SYS_ELF64_H_ */