FreeBSD/Linux Kernel Cross Reference
sys/sys/elf64.h

     /*-
      * 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _SYS_ELF64_H_
    #define _SYS_ELF64_H_ 1
    
    #include <sys/elf_common.h>
    
    /*
     * ELF definitions common to all 64-bit architectures.
     */
    
    typedef u_int64_t       Elf64_Addr;
    typedef u_int32_t       Elf64_Half;
    typedef u_int64_t       Elf64_Off;
    typedef int64_t         Elf64_Sword;
    typedef u_int64_t       Elf64_Word;
    typedef u_int64_t       Elf64_Size;
    typedef u_int16_t       Elf64_Quarter;
    
    /*
     * 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_ */

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