source: kStuff/trunk/include/k/kLdrFmts/elf64.h@ 18

/*-
 * 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 ___k_kLdrFmts_elf64_h___
#define ___k_kLdrFmts_elf64_h___

#include <k/kDefs.h>
#include <k/kTypes.h>
#include <k/kLdrFmts/elf_common.h>

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

typedef KU64    Elf64_Addr;
typedef KU32    Elf64_Half;
typedef KU64    Elf64_Off;
typedef KI64    Elf64_Sword;
typedef KU64    Elf64_Word;
typedef KU64    Elf64_Size;
typedef KU16    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