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