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

   1 /*      $NetBSD: gelf_syminfo.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
  38 #include "_libelf.h"
  39
  40 __RCSID("$NetBSD: gelf_syminfo.c,v 1.2 2014/03/09 16:58:04 christos Exp $");
  41 ELFTC_VCSID("Id: gelf_syminfo.c 2272 2011-12-03 17:07:31Z jkoshy ");
  42
  43 GElf_Syminfo *
  44 gelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst)
  45 {
  46         int ec;
  47         Elf *e;
  48         size_t msz;
  49         Elf_Scn *scn;
  50         uint32_t sh_type;
  51         struct _Libelf_Data *d;
  52         Elf32_Syminfo *syminfo32;
  53         Elf64_Syminfo *syminfo64;
  54
  55         d = (struct _Libelf_Data *) ed;
  56
  57         if (d == NULL || ndx < 0 || dst == NULL ||
  58             (scn = d->d_scn) == NULL ||
  59             (e = scn->s_elf) == NULL) {
  60                 LIBELF_SET_ERROR(ARGUMENT, 0);
  61                 return (NULL);
  62         }
  63
  64         ec = e->e_class;
  65         assert(ec == ELFCLASS32 || ec == ELFCLASS64);
  66
  67         if (ec == ELFCLASS32)
  68                 sh_type = scn->s_shdr.s_shdr32.sh_type;
  69         else
  70                 sh_type = scn->s_shdr.s_shdr64.sh_type;
  71
  72         if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) {
  73                 LIBELF_SET_ERROR(ARGUMENT, 0);
  74                 return (NULL);
  75         }
  76
  77         msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version);
  78
  79         assert(msz > 0);
  80
  81         if (msz * ndx >= d->d_data.d_size) {
  82                 LIBELF_SET_ERROR(ARGUMENT, 0);
  83                 return (NULL);
  84         }
  85
  86         if (ec == ELFCLASS32) {
  87
  88                 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx;
  89
  90                 dst->si_boundto = syminfo32->si_boundto;
  91                 dst->si_flags   = syminfo32->si_flags;
  92
  93         } else {
  94
  95                 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx;
  96
  97                 *dst = *syminfo64;
  98         }
  99
 100         return (dst);
 101 }
 102
 103 int
 104 gelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs)
 105 {
 106         int ec;
 107         Elf *e;
 108         size_t msz;
 109         Elf_Scn *scn;
 110         uint32_t sh_type;
 111         struct _Libelf_Data *d;
 112         Elf32_Syminfo *syminfo32;
 113         Elf64_Syminfo *syminfo64;
 114
 115         d = (struct _Libelf_Data *) ed;
 116
 117         if (d == NULL || ndx < 0 || gs == NULL ||
 118             (scn = d->d_scn) == NULL ||
 119             (e = scn->s_elf) == NULL) {
 120                 LIBELF_SET_ERROR(ARGUMENT, 0);
 121                 return (0);
 122         }
 123
 124         ec = e->e_class;
 125         assert(ec == ELFCLASS32 || ec == ELFCLASS64);
 126
 127         if (ec == ELFCLASS32)
 128                 sh_type = scn->s_shdr.s_shdr32.sh_type;
 129         else
 130                 sh_type = scn->s_shdr.s_shdr64.sh_type;
 131
 132         if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) {
 133                 LIBELF_SET_ERROR(ARGUMENT, 0);
 134                 return (0);
 135         }
 136
 137         msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version);
 138         assert(msz > 0);
 139
 140         if (msz * ndx >= d->d_data.d_size) {
 141                 LIBELF_SET_ERROR(ARGUMENT, 0);
 142                 return (0);
 143         }
 144
 145         if (ec == ELFCLASS32) {
 146                 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx;
 147
 148                 syminfo32->si_boundto  = gs->si_boundto;
 149                 syminfo32->si_flags  = gs->si_flags;
 150
 151         } else {
 152                 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx;
 153
 154                 *syminfo64 = *gs;
 155         }
 156
 157         return (1);
 158 }