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  * $FreeBSD$
  27  */
  28
  29 #include <sys/types.h>
  30 #include <sys/endian.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         htole16(ET_EXEC),                           /* e_type */
  48         htole16(EM_386),                            /* e_machine */
  49         htole32(EV_CURRENT),                        /* e_version */
  50         htole32(SET_ME),                            /* e_entry */
  51         htole32(offsetof(struct elfh, p)),          /* e_phoff */
  52         htole32(offsetof(struct elfh, sh)),         /* e_shoff */
  53         0,                                          /* e_flags */
  54         htole16(sizeof(elfhdr.e)),                  /* e_ehsize */
  55         htole16(sizeof(elfhdr.p[0])),               /* e_phentsize */
  56         htole16(sizeof(elfhdr.p) / sizeof(elfhdr.p[0])), /* e_phnum */
  57         htole16(sizeof(elfhdr.sh[0])),              /* e_shentsize */
  58         htole16(sizeof(elfhdr.sh) / sizeof(elfhdr.sh[0])), /* e_shnum */
  59         htole16(1)                                  /* e_shstrndx */
  60     },
  61     {
  62         {
  63             htole32(PT_LOAD),                       /* p_type */
  64             htole32(sizeof(elfhdr)),                /* p_offset */
  65             htole32(SET_ME),                        /* p_vaddr */
  66             htole32(SET_ME),                        /* p_paddr */
  67             htole32(SET_ME),                        /* p_filesz */
  68             htole32(SET_ME),                        /* p_memsz */
  69             htole32(PF_R | PF_X),                   /* p_flags */
  70             htole32(0x1000)                         /* p_align */
  71         },
  72         {
  73             htole32(PT_LOAD),                       /* p_type */
  74             htole32(SET_ME),                        /* p_offset */
  75             htole32(SET_ME),                        /* p_vaddr */
  76             htole32(SET_ME),                        /* p_paddr */
  77             htole32(SET_ME),                        /* p_filesz */
  78             htole32(SET_ME),                        /* p_memsz */
  79             htole32(PF_R | PF_W),                   /* p_flags */
  80             htole32(0x1000)                         /* p_align */
  81         }
  82     },
  83     {
  84         {
  85             0, htole32(SHT_NULL), 0, 0, 0, 0, htole32(SHN_UNDEF), 0, 0, 0
  86         },
  87         {
  88             htole32(1),                             /* sh_name */
  89             htole32(SHT_STRTAB),                    /* sh_type */
  90             0,                                      /* sh_flags */
  91             0,                                      /* sh_addr */
  92             htole32(offsetof(struct elfh, shstrtab)), /* sh_offset */
  93             htole32(sizeof(elfhdr.shstrtab)),       /* sh_size */
  94             htole32(SHN_UNDEF),                     /* sh_link */
  95             0,                                      /* sh_info */
  96             htole32(1),                             /* sh_addralign */
  97             0                                       /* sh_entsize */
  98         },
  99         {
 100             htole32(0xb),                           /* sh_name */
 101             htole32(SHT_PROGBITS),                  /* sh_type */
 102             htole32(SHF_EXECINSTR | SHF_ALLOC),     /* sh_flags */
 103             htole32(SET_ME),                        /* sh_addr */
 104             htole32(SET_ME),                        /* sh_offset */
 105             htole32(SET_ME),                        /* sh_size */
 106             htole32(SHN_UNDEF),                     /* sh_link */
 107             0,                                      /* sh_info */
 108             htole32(4),                             /* sh_addralign */
 109             0                                       /* sh_entsize */
 110         },
 111         {
 112             htole32(0x11),                          /* sh_name */
 113             htole32(SHT_PROGBITS),                  /* sh_type */
 114             htole32(SHF_ALLOC | SHF_WRITE),         /* sh_flags */
 115             htole32(SET_ME),                        /* sh_addr */
 116             htole32(SET_ME),                        /* sh_offset */
 117             htole32(SET_ME),                        /* sh_size */
 118             htole32(SHN_UNDEF),                     /* sh_link */
 119             0,                                      /* sh_info */
 120             htole32(4),                             /* sh_addralign */
 121             0                                       /* sh_entsize */
 122         }
 123     },
 124     "\0.shstrtab\0.text\0.data"                     /* shstrtab */
 125 };