usr.sbin/btxld/elfh.c

   1 /*
   2  * Copyright (c) 1998 Robert Nordier
   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
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
  18  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
  19  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  20  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  21  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  22  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  23  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  24  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/usr.sbin/btxld/elfh.c,v 1.3 2000/01/04 14:10:36 marcel Exp $
  27  * $DragonFly: src/usr.sbin/btxld/elfh.c,v 1.2 2003/06/17 04:29:52 dillon Exp $
  28  */
  29
  30 #include <sys/types.h>
  31
  32 #include <stddef.h>
  33 #include "elfh.h"
  34
  35 #define SET_ME  0xeeeeeeee    /* filled in by btxld */
  36
  37 /*
  38  * ELF header template.
  39  */
  40 const struct elfh elfhdr = {
  41     {
  42         {
  43             ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3,     /* e_ident */
  44             ELFCLASS32, ELFDATA2LSB, EV_CURRENT, 0,
  45             'F', 'r', 'e', 'e', 'B', 'S', 'D', 0
  46         },
  47         ET_EXEC,                                    /* e_type */
  48         EM_386,                                     /* e_machine */
  49         EV_CURRENT,                                 /* e_version */
  50         SET_ME,                                     /* e_entry */
  51         offsetof(struct elfh, p),                   /* e_phoff */
  52         offsetof(struct elfh, sh),                  /* e_shoff */
  53         0,                                          /* e_flags */
  54         sizeof(elfhdr.e),                           /* e_ehsize */
  55         sizeof(elfhdr.p[0]),                        /* e_phentsize */
  56         sizeof(elfhdr.p) / sizeof(elfhdr.p[0]),     /* e_phnum */
  57         sizeof(elfhdr.sh[0]),                       /* e_shentsize */
  58         sizeof(elfhdr.sh) / sizeof(elfhdr.sh[0]),   /* e_shnum */
  59         1                                           /* e_shstrndx */
  60     },
  61     {
  62         {
  63             PT_LOAD,                                /* p_type */
  64             sizeof(elfhdr),                         /* p_offset */
  65             SET_ME,                                 /* p_vaddr */
  66             SET_ME,                                 /* p_paddr */
  67             SET_ME,                                 /* p_filesz */
  68             SET_ME,                                 /* p_memsz */
  69             PF_R | PF_X,                            /* p_flags */
  70             0x1000                                  /* p_align */
  71         },
  72         {
  73             PT_LOAD,                                /* p_type */
  74             SET_ME,                                 /* p_offset */
  75             SET_ME,                                 /* p_vaddr */
  76             SET_ME,                                 /* p_paddr */
  77             SET_ME,                                 /* p_filesz */
  78             SET_ME,                                 /* p_memsz */
  79             PF_R | PF_W,                            /* p_flags */
  80             0x1000                                  /* p_align */
  81         }
  82     },
  83     {
  84         {
  85             0, SHT_NULL, 0, 0, 0, 0, SHN_UNDEF, 0, 0, 0
  86         },
  87         {
  88             1,                                      /* sh_name */
  89             SHT_STRTAB,                             /* sh_type */
  90             0,                                      /* sh_flags */
  91             0,                                      /* sh_addr */
  92             offsetof(struct elfh, shstrtab),        /* sh_offset */
  93             sizeof(elfhdr.shstrtab),                /* sh_size */
  94             SHN_UNDEF,                              /* sh_link */
  95             0,                                      /* sh_info */
  96             1,                                      /* sh_addralign */
  97             0                                       /* sh_entsize */
  98         },
  99         {
 100             0xb,                                    /* sh_name */
 101             SHT_PROGBITS,                           /* sh_type */
 102             SHF_EXECINSTR | SHF_ALLOC,              /* sh_flags */
 103             SET_ME,                                 /* sh_addr */
 104             SET_ME,                                 /* sh_offset */
 105             SET_ME,                                 /* sh_size */
 106             SHN_UNDEF,                              /* sh_link */
 107             0,                                      /* sh_info */
 108             4,                                      /* sh_addralign */
 109             0                                       /* sh_entsize */
 110         },
 111         {
 112             0x11,                                   /* sh_name */
 113             SHT_PROGBITS,                           /* sh_type */
 114             SHF_ALLOC | SHF_WRITE,                  /* sh_flags */
 115             SET_ME,                                 /* sh_addr */
 116             SET_ME,                                 /* sh_offset */
 117             SET_ME,                                 /* sh_size */
 118             SHN_UNDEF,                              /* sh_link */
 119             0,                                      /* sh_info */
 120             4,                                      /* sh_addralign */
 121             0                                       /* sh_entsize */
 122         }
 123     },
 124     "\0.shstrtab\0.text\0.data"                     /* shstrtab */
 125 };