usr.sbin/kgzip/elfhdr.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 1999 Global Technology Associates, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
  21  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  22  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  23  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  24  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  25  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  26  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD$
  29  */
  30
  31 #include <sys/endian.h>
  32 #include <stddef.h>
  33 #include "elfhdr.h"
  34
  35 #define KGZ_FIX_NSIZE   0       /* Run-time fixup */
  36
  37 /*
  38  * Relocatable header template.
  39  */
  40 const struct kgz_elfhdr elfhdr = {
  41     /* ELF header */
  42     {
  43         {
  44             ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3,         /* e_ident */
  45             ELFCLASS32, ELFDATA2LSB, EV_CURRENT, 0,
  46             'F', 'r', 'e', 'e', 'B', 'S', 'D', 0
  47         },
  48         htole16(ET_EXEC),                               /* e_type */
  49         htole16(EM_386),                                /* e_machine */
  50         htole32(EV_CURRENT),                            /* e_version */
  51         0,                                              /* e_entry */
  52         0,                                              /* e_phoff */
  53         htole32(offsetof(struct kgz_elfhdr, sh)),       /* e_shoff */
  54         0,                                              /* e_flags */
  55         htole16(sizeof(Elf32_Ehdr)),                    /* e_ehsize */
  56         0,                                              /* e_phentsize */
  57         0,                                              /* e_phnum */
  58         htole16(sizeof(Elf32_Shdr)),                    /* e_shentsize */
  59         htole16(KGZ_SHNUM),                             /* e_shnum */
  60         htole16(KGZ_SH_SHSTRTAB)                        /* e_shstrndx */
  61     },
  62     /* Section header */
  63     {
  64         {
  65             0,                                          /* sh_name */
  66             htole32(SHT_NULL),                          /* sh_type */
  67             0,                                          /* sh_flags */
  68             0,                                          /* sh_addr */
  69             0,                                          /* sh_offset */
  70             0,                                          /* sh_size */
  71             htole32(SHN_UNDEF),                         /* sh_link */
  72             0,                                          /* sh_info */
  73             0,                                          /* sh_addralign */
  74             0                                           /* sh_entsize */
  75         },
  76         {
  77             htole32(offsetof(struct kgz_shstrtab, symtab)), /* sh_name */
  78             htole32(SHT_SYMTAB),                        /* sh_type */
  79             0,                                          /* sh_flags */
  80             0,                                          /* sh_addr */
  81             htole32(offsetof(struct kgz_elfhdr, st)),   /* sh_offset */
  82             htole32(sizeof(Elf32_Sym) * KGZ_STNUM),     /* sh_size */
  83             htole32(KGZ_SH_STRTAB),                     /* sh_link */
  84             htole32(1),                                 /* sh_info */
  85             htole32(4),                                 /* sh_addralign */
  86             htole32(sizeof(Elf32_Sym))                  /* sh_entsize */
  87         },
  88         {
  89             htole32(offsetof(struct kgz_shstrtab, shstrtab)), /* sh_name */
  90             htole32(SHT_STRTAB),                        /* sh_type */
  91             0,                                          /* sh_flags */
  92             0,                                          /* sh_addr */
  93             htole32(offsetof(struct kgz_elfhdr, shstrtab)), /* sh_offset */
  94             htole32(sizeof(struct kgz_shstrtab)),       /* sh_size */
  95             htole32(SHN_UNDEF),                         /* sh_link */
  96             0,                                          /* sh_info */
  97             htole32(1),                                 /* sh_addralign */
  98             0                                           /* sh_entsize */
  99         },
 100         {
 101             htole32(offsetof(struct kgz_shstrtab, strtab)), /* sh_name */
 102             htole32(SHT_STRTAB),                        /* sh_type */
 103             0,                                          /* sh_flags */
 104             0,                                          /* sh_addr */
 105             htole32(offsetof(struct kgz_elfhdr, strtab)), /* sh_offset */
 106             htole32(sizeof(struct kgz_strtab)),         /* sh_size */
 107             htole32(SHN_UNDEF),                         /* sh_link */
 108             0,                                          /* sh_info */
 109             htole32(1),                                 /* sh_addralign */
 110             0                                           /* sh_entsize */
 111         },
 112         {
 113             htole32(offsetof(struct kgz_shstrtab, data)), /* sh_name */
 114             htole32(SHT_PROGBITS),                      /* sh_type */
 115             htole32(SHF_ALLOC | SHF_WRITE),             /* sh_flags */
 116             0,                                          /* sh_addr */
 117             htole32(sizeof(struct kgz_elfhdr)),         /* sh_offset */
 118             htole32(sizeof(struct kgz_hdr) + KGZ_FIX_NSIZE), /* sh_size */
 119             htole32(SHN_UNDEF),                         /* sh_link */
 120             0,                                          /* sh_info */
 121             htole32(4),                                 /* sh_addralign */
 122             0                                           /* sh_entsize */
 123         }
 124     },
 125     /* Symbol table */
 126     {
 127         {
 128             0,                                          /* st_name */
 129             0,                                          /* st_value */
 130             0,                                          /* st_size */
 131             0,                                          /* st_info */
 132             0,                                          /* st_other */
 133             htole16(SHN_UNDEF)                          /* st_shndx */
 134         },
 135         {
 136             htole32(offsetof(struct kgz_strtab, kgz)),  /* st_name */
 137             0,                                          /* st_value */
 138             htole32(sizeof(struct kgz_hdr)),            /* st_size */
 139             ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT),      /* st_info */
 140             0,                                          /* st_other */
 141             htole16(KGZ_SH_DATA)                        /* st_shndx */
 142         },
 143         {
 144             htole32(offsetof(struct kgz_strtab, kgz_ndata)), /* st_name */
 145             htole32(sizeof(struct kgz_hdr)),            /* st_value */
 146             htole32(KGZ_FIX_NSIZE),                     /* st_size */
 147             ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT),      /* st_info */
 148             0,                                          /* st_other */
 149             htole16(KGZ_SH_DATA)                        /* st_shndx */
 150         }
 151     },
 152     /* Section header string table */
 153     {
 154         KGZ_SHSTR_ZERO,                                 /* zero */
 155         KGZ_SHSTR_SYMTAB,                               /* symtab */
 156         KGZ_SHSTR_SHSTRTAB,                             /* shstrtab */
 157         KGZ_SHSTR_STRTAB,                               /* strtab */
 158         KGZ_SHSTR_DATA                                  /* data */
 159     },
 160     /* String table */
 161     {
 162         KGZ_STR_ZERO,                                   /* zero */
 163         KGZ_STR_KGZ,                                    /* kgz */
 164         KGZ_STR_KGZ_NDATA                               /* kgz_ndata */
 165     }
 166 };