external/bsd/elftoolchain/dist/libelf/gelf_shdr.c

   1 /*      $NetBSD: gelf_shdr.c,v 1.2 2014/03/09 16:58:04 christos Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2006,2008 Joseph Koshy
   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 PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #if HAVE_NBTOOL_CONFIG_H
  30 # include "nbtool_config.h"
  31 #endif
  32
  33 #include <sys/cdefs.h>
  34
  35 #include <assert.h>
  36 #include <gelf.h>
  37 #include <libelf.h>
  38 #include <limits.h>
  39
  40 #include "_libelf.h"
  41
  42 __RCSID("$NetBSD: gelf_shdr.c,v 1.2 2014/03/09 16:58:04 christos Exp $");
  43 ELFTC_VCSID("Id: gelf_shdr.c 2268 2011-12-03 17:05:11Z jkoshy ");
  44
  45 Elf32_Shdr *
  46 elf32_getshdr(Elf_Scn *s)
  47 {
  48         return (_libelf_getshdr(s, ELFCLASS32));
  49 }
  50
  51 Elf64_Shdr *
  52 elf64_getshdr(Elf_Scn *s)
  53 {
  54         return (_libelf_getshdr(s, ELFCLASS64));
  55 }
  56
  57 GElf_Shdr *
  58 gelf_getshdr(Elf_Scn *s, GElf_Shdr *d)
  59 {
  60         int ec;
  61         void *sh;
  62         Elf32_Shdr *sh32;
  63         Elf64_Shdr *sh64;
  64
  65         if (d == NULL) {
  66                 LIBELF_SET_ERROR(ARGUMENT, 0);
  67                 return (NULL);
  68         }
  69
  70         if ((sh = _libelf_getshdr(s, ELFCLASSNONE)) == NULL)
  71                 return (NULL);
  72
  73         ec = s->s_elf->e_class;
  74         assert(ec == ELFCLASS32 || ec == ELFCLASS64);
  75
  76         if (ec == ELFCLASS32) {
  77                 sh32 = (Elf32_Shdr *) sh;
  78
  79                 d->sh_name      = sh32->sh_name;
  80                 d->sh_type      = sh32->sh_type;
  81                 d->sh_flags     = (Elf64_Xword) sh32->sh_flags;
  82                 d->sh_addr      = (Elf64_Addr) sh32->sh_addr;
  83                 d->sh_offset    = (Elf64_Off) sh32->sh_offset;
  84                 d->sh_size      = (Elf64_Xword) sh32->sh_size;
  85                 d->sh_link      = sh32->sh_link;
  86                 d->sh_info      = sh32->sh_info;
  87                 d->sh_addralign = (Elf64_Xword) sh32->sh_addralign;
  88                 d->sh_entsize   = (Elf64_Xword) sh32->sh_entsize;
  89         } else {
  90                 sh64 = (Elf64_Shdr *) sh;
  91                 *d = *sh64;
  92         }
  93
  94         return (d);
  95 }
  96
  97 int
  98 gelf_update_shdr(Elf_Scn *scn, GElf_Shdr *s)
  99 {
 100         int ec;
 101         Elf *e;
 102         Elf32_Shdr *sh32;
 103
 104
 105         if (s == NULL || scn == NULL || (e = scn->s_elf) == NULL ||
 106             e->e_kind != ELF_K_ELF ||
 107             ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
 108                 LIBELF_SET_ERROR(ARGUMENT, 0);
 109                 return (0);
 110         }
 111
 112         if (e->e_cmd == ELF_C_READ) {
 113                 LIBELF_SET_ERROR(MODE, 0);
 114                 return (0);
 115         }
 116
 117         (void) elf_flagscn(scn, ELF_C_SET, ELF_F_DIRTY);
 118
 119         if (ec == ELFCLASS64) {
 120                 scn->s_shdr.s_shdr64 = *s;
 121                 return (1);
 122         }
 123
 124         sh32 = &scn->s_shdr.s_shdr32;
 125
 126         sh32->sh_name    =  s->sh_name;
 127         sh32->sh_type    =  s->sh_type;
 128         LIBELF_COPY_U32(sh32, s, sh_flags);
 129         LIBELF_COPY_U32(sh32, s, sh_addr);
 130         LIBELF_COPY_U32(sh32, s, sh_offset);
 131         LIBELF_COPY_U32(sh32, s, sh_size);
 132         sh32->sh_link    =  s->sh_link;
 133         sh32->sh_info    =  s->sh_info;
 134         LIBELF_COPY_U32(sh32, s, sh_addralign);
 135         LIBELF_COPY_U32(sh32, s, sh_entsize);
 136
 137         return (1);
 138 }