usr.sbin/kgzip/elfhdr.c

   1 /*
   2  * Copyright (c) 1999 Global Technology Associates, Inc.
   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/kgzip/elfhdr.c,v 1.2 1999/08/28 01:16:43 peter Exp $
  27  * $DragonFly: src/usr.sbin/kgzip/elfhdr.c,v 1.2 2003/06/17 04:29:55 dillon Exp $
  28  */
  29
  30 #include <stddef.h>
  31 #include "elfhdr.h"
  32
  33 #define KGZ_FIX_NSIZE   0       /* Run-time fixup */
  34
  35 /*
  36  * Relocatable header template.
  37  */
  38 const struct kgz_elfhdr elfhdr = {
  39     /* ELF header */
  40     {
  41         {
  42             ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3,         /* e_ident */
  43             ELFCLASS32, ELFDATA2LSB, EV_CURRENT, 0,
  44             'F', 'r', 'e', 'e', 'B', 'S', 'D', 0
  45         },
  46         ET_EXEC,                                        /* e_type */
  47         EM_386,                                         /* e_machine */
  48         EV_CURRENT,                                     /* e_version */
  49         0,                                              /* e_entry */
  50         0,                                              /* e_phoff */
  51         offsetof(struct kgz_elfhdr, sh),                /* e_shoff */
  52         0,                                              /* e_flags */
  53         sizeof(Elf32_Ehdr),                             /* e_ehsize */
  54         0,                                              /* e_phentsize */
  55         0,                                              /* e_phnum */
  56         sizeof(Elf32_Shdr),                             /* e_shentsize */
  57         KGZ_SHNUM,                                      /* e_shnum */
  58         KGZ_SH_SHSTRTAB                                 /* e_shstrndx */
  59     },
  60     /* Section header */
  61     {
  62         {
  63             0,                                          /* sh_name */
  64             SHT_NULL,                                   /* sh_type */
  65             0,                                          /* sh_flags */
  66             0,                                          /* sh_addr */
  67             0,                                          /* sh_offset */
  68             0,                                          /* sh_size */
  69             SHN_UNDEF,                                  /* sh_link */
  70             0,                                          /* sh_info */
  71             0,                                          /* sh_addralign */
  72             0                                           /* sh_entsize */
  73         },
  74         {
  75             offsetof(struct kgz_shstrtab, symtab),      /* sh_name */
  76             SHT_SYMTAB,                                 /* sh_type */
  77             0,                                          /* sh_flags */
  78             0,                                          /* sh_addr */
  79             offsetof(struct kgz_elfhdr, st),            /* sh_offset */
  80             sizeof(Elf32_Sym) * KGZ_STNUM,              /* sh_size */
  81             KGZ_SH_STRTAB,                              /* sh_link */
  82             1,                                          /* sh_info */
  83             4,                                          /* sh_addralign */
  84             sizeof(Elf32_Sym)                           /* sh_entsize */
  85         },
  86         {
  87             offsetof(struct kgz_shstrtab, shstrtab),    /* sh_name */
  88             SHT_STRTAB,                                 /* sh_type */
  89             0,                                          /* sh_flags */
  90             0,                                          /* sh_addr */
  91             offsetof(struct kgz_elfhdr, shstrtab),      /* sh_offset */
  92             sizeof(struct kgz_shstrtab),                /* sh_size */
  93             SHN_UNDEF,                                  /* sh_link */
  94             0,                                          /* sh_info */
  95             1,                                          /* sh_addralign */
  96             0                                           /* sh_entsize */
  97         },
  98         {
  99             offsetof(struct kgz_shstrtab, strtab),      /* sh_name */
 100             SHT_STRTAB,                                 /* sh_type */
 101             0,                                          /* sh_flags */
 102             0,                                          /* sh_addr */
 103             offsetof(struct kgz_elfhdr, strtab),        /* sh_offset */
 104             sizeof(struct kgz_strtab),                  /* sh_size */
 105             SHN_UNDEF,                                  /* sh_link */
 106             0,                                          /* sh_info */
 107             1,                                          /* sh_addralign */
 108             0                                           /* sh_entsize */
 109         },
 110         {
 111             offsetof(struct kgz_shstrtab, data),        /* sh_name */
 112             SHT_PROGBITS,                               /* sh_type */
 113             SHF_ALLOC | SHF_WRITE,                      /* sh_flags */
 114             0,                                          /* sh_addr */
 115             sizeof(struct kgz_elfhdr),                  /* sh_offset */
 116             sizeof(struct kgz_hdr) + KGZ_FIX_NSIZE,     /* sh_size */
 117             SHN_UNDEF,                                  /* sh_link */
 118             0,                                          /* sh_info */
 119             4,                                          /* sh_addralign */
 120             0                                           /* sh_entsize */
 121         }
 122     },
 123     /* Symbol table */
 124     {
 125         {
 126             0,                                          /* st_name */
 127             0,                                          /* st_value */
 128             0,                                          /* st_size */
 129             0,                                          /* st_info */
 130             0,                                          /* st_other */
 131             SHN_UNDEF                                   /* st_shndx */
 132         },
 133         {
 134             offsetof(struct kgz_strtab, kgz),           /* st_name */
 135             0,                                          /* st_value */
 136             sizeof(struct kgz_hdr),                     /* st_size */
 137             ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT),      /* st_info */
 138             0,                                          /* st_other */
 139             KGZ_SH_DATA                                 /* st_shndx */
 140         },
 141         {
 142             offsetof(struct kgz_strtab, kgz_ndata),     /* st_name */
 143             sizeof(struct kgz_hdr),                     /* st_value */
 144             KGZ_FIX_NSIZE,                              /* st_size */
 145             ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT),      /* st_info */
 146             0,                                          /* st_other */
 147             KGZ_SH_DATA                                 /* st_shndx */
 148         }
 149     },
 150     /* Section header string table */
 151     {
 152         KGZ_SHSTR_ZERO,                                 /* zero */
 153         KGZ_SHSTR_SYMTAB,                               /* symtab */
 154         KGZ_SHSTR_SHSTRTAB,                             /* shstrtab */
 155         KGZ_SHSTR_STRTAB,                               /* strtab */
 156         KGZ_SHSTR_DATA                                  /* data */
 157     },
 158     /* String table */
 159     {
 160         KGZ_STR_ZERO,                                   /* zero */
 161         KGZ_STR_KGZ,                                    /* kgz */
 162         KGZ_STR_KGZ_NDATA                               /* kgz_ndata */
 163     }
 164 };