usr/src/tools/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/byteorder.h>
  31
  32 #include <stddef.h>
  33 #include "elfh.h"
  34
  35 #define SET_ME  0xeeeeeeee    /* filled in by btxld */
  36
  37 /*
  38  * Our endian.h is implementing functions, so need to use byteorder macros.
  39  */
  40 #ifndef htole16
  41 #define htole16 LE_16
  42 #endif
  43 #ifndef htole32
  44 #define htole32 LE_32
  45 #endif
  46
  47 /*
  48  * ELF header template.
  49  */
  50 const struct elfh elfhdr = {
  51     {
  52         {
  53             ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3,     /* e_ident */
  54             ELFCLASS32, ELFDATA2LSB, EV_CURRENT, 0,
  55             'F', 'r', 'e', 'e', 'B', 'S', 'D', 0
  56         },
  57         htole16(ET_EXEC),                           /* e_type */
  58         htole16(EM_386),                            /* e_machine */
  59         htole32(EV_CURRENT),                        /* e_version */
  60         htole32(SET_ME),                            /* e_entry */
  61         htole32(offsetof(struct elfh, p)),          /* e_phoff */
  62         htole32(offsetof(struct elfh, sh)),         /* e_shoff */
  63         0,                                          /* e_flags */
  64         htole16(sizeof(elfhdr.e)),                  /* e_ehsize */
  65         htole16(sizeof(elfhdr.p[0])),               /* e_phentsize */
  66         htole16(sizeof(elfhdr.p) / sizeof(elfhdr.p[0])), /* e_phnum */
  67         htole16(sizeof(elfhdr.sh[0])),              /* e_shentsize */
  68         htole16(sizeof(elfhdr.sh) / sizeof(elfhdr.sh[0])), /* e_shnum */
  69         htole16(1)                                  /* e_shstrndx */
  70     },
  71     {
  72         {
  73             htole32(PT_LOAD),                       /* p_type */
  74             htole32(sizeof(elfhdr)),                /* 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_X),                   /* p_flags */
  80             htole32(0x1000)                         /* p_align */
  81         },
  82         {
  83             htole32(PT_LOAD),                       /* p_type */
  84             htole32(SET_ME),                        /* p_offset */
  85             htole32(SET_ME),                        /* p_vaddr */
  86             htole32(SET_ME),                        /* p_paddr */
  87             htole32(SET_ME),                        /* p_filesz */
  88             htole32(SET_ME),                        /* p_memsz */
  89             htole32(PF_R | PF_W),                   /* p_flags */
  90             htole32(0x1000)                         /* p_align */
  91         }
  92     },
  93     {
  94         {
  95             0, htole32(SHT_NULL), 0, 0, 0, 0, htole32(SHN_UNDEF), 0, 0, 0
  96         },
  97         {
  98             htole32(1),                             /* sh_name */
  99             htole32(SHT_STRTAB),                    /* sh_type */
 100             0,                                      /* sh_flags */
 101             0,                                      /* sh_addr */
 102             htole32(offsetof(struct elfh, shstrtab)), /* sh_offset */
 103             htole32(sizeof(elfhdr.shstrtab)),       /* sh_size */
 104             htole32(SHN_UNDEF),                     /* sh_link */
 105             0,                                      /* sh_info */
 106             htole32(1),                             /* sh_addralign */
 107             0                                       /* sh_entsize */
 108         },
 109         {
 110             htole32(0xb),                           /* sh_name */
 111             htole32(SHT_PROGBITS),                  /* sh_type */
 112             htole32(SHF_EXECINSTR | SHF_ALLOC),     /* sh_flags */
 113             htole32(SET_ME),                        /* sh_addr */
 114             htole32(SET_ME),                        /* sh_offset */
 115             htole32(SET_ME),                        /* sh_size */
 116             htole32(SHN_UNDEF),                     /* sh_link */
 117             0,                                      /* sh_info */
 118             htole32(4),                             /* sh_addralign */
 119             0                                       /* sh_entsize */
 120         },
 121         {
 122             htole32(0x11),                          /* sh_name */
 123             htole32(SHT_PROGBITS),                  /* sh_type */
 124             htole32(SHF_ALLOC | SHF_WRITE),         /* sh_flags */
 125             htole32(SET_ME),                        /* sh_addr */
 126             htole32(SET_ME),                        /* sh_offset */
 127             htole32(SET_ME),                        /* sh_size */
 128             htole32(SHN_UNDEF),                     /* sh_link */
 129             0,                                      /* sh_info */
 130             htole32(4),                             /* sh_addralign */
 131             0                                       /* sh_entsize */
 132         }
 133     },
 134     "\0.shstrtab\0.text\0.data"                     /* shstrtab */
 135 };