The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/elf.h

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    1 /*-
    2  * Copyright (c) 1996-1997 John D. Polstra.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #ifndef _MACHINE_ELF_H_
   30 #define _MACHINE_ELF_H_ 1
   31 
   32 /*
   33  * ELF definitions for the i386 architecture.
   34  */
   35 
   36 #include <sys/elf32.h>  /* Definitions common to all 32 bit architectures. */
   37 #if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64
   38 #include <sys/elf64.h>  /* Definitions common to all 64 bit architectures. */
   39 #endif
   40 
   41 #ifndef __ELF_WORD_SIZE
   42 #define __ELF_WORD_SIZE 32      /* Used by <sys/elf_generic.h> */
   43 #endif
   44 
   45 #include <sys/elf_generic.h>
   46 
   47 #define ELF_ARCH        EM_386
   48 
   49 #define ELF_MACHINE_OK(x) ((x) == EM_386 || (x) == EM_486)
   50 
   51 /*
   52  * Auxiliary vector entries for passing information to the interpreter.
   53  *
   54  * The i386 supplement to the SVR4 ABI specification names this "auxv_t",
   55  * but POSIX lays claim to all symbols ending with "_t".
   56  */
   57 
   58 typedef struct {        /* Auxiliary vector entry on initial stack */
   59         int     a_type;                 /* Entry type. */
   60         union {
   61                 long    a_val;          /* Integer value. */
   62                 void    *a_ptr;         /* Address. */
   63                 void    (*a_fcn)(void); /* Function pointer (not used). */
   64         } a_un;
   65 } Elf32_Auxinfo;
   66 
   67 #if __ELF_WORD_SIZE == 64
   68 /* Fake for amd64 loader support */
   69 typedef struct {
   70         int fake;
   71 } Elf64_Auxinfo;
   72 #endif
   73 
   74 __ElfType(Auxinfo);
   75 
   76 /* Values for a_type. */
   77 #define AT_NULL         0       /* Terminates the vector. */
   78 #define AT_IGNORE       1       /* Ignored entry. */
   79 #define AT_EXECFD       2       /* File descriptor of program to load. */
   80 #define AT_PHDR         3       /* Program header of program already loaded. */
   81 #define AT_PHENT        4       /* Size of each program header entry. */
   82 #define AT_PHNUM        5       /* Number of program header entries. */
   83 #define AT_PAGESZ       6       /* Page size in bytes. */
   84 #define AT_BASE         7       /* Interpreter's base address. */
   85 #define AT_FLAGS        8       /* Flags (unused for i386). */
   86 #define AT_ENTRY        9       /* Where interpreter should transfer control. */
   87 #define AT_NOTELF       10      /* Program is not ELF ?? */
   88 #define AT_UID          11      /* Real uid. */
   89 #define AT_EUID         12      /* Effective uid. */
   90 #define AT_GID          13      /* Real gid. */
   91 #define AT_EGID         14      /* Effective gid. */
   92 #define AT_EXECPATH     15      /* Path to the executable. */
   93 
   94 #define AT_COUNT        16      /* Count of defined aux entry types. */
   95 
   96 /*
   97  * Relocation types.
   98  */
   99 
  100 #define R_386_COUNT     38      /* Count of defined relocation types. */
  101 
  102 /* Define "machine" characteristics */
  103 #define ELF_TARG_CLASS  ELFCLASS32
  104 #define ELF_TARG_DATA   ELFDATA2LSB
  105 #define ELF_TARG_MACH   EM_386
  106 #define ELF_TARG_VER    1
  107 
  108 #define ET_DYN_LOAD_ADDR 0x01001000
  109 
  110 #endif /* !_MACHINE_ELF_H_ */

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