Line data    Source code

       1             : /* Return number of sections in the ELF file.
       2             :    Copyright (C) 2002, 2009, 2015 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 2002.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include <assert.h>
      35             : #include <gelf.h>
      36             : #include <stddef.h>
      37             : 
      38             : #include "libelfP.h"
      39             : 
      40             : 
      41             : int
      42             : internal_function
      43        2803 : __elf_getshdrnum_rdlock (Elf *elf, size_t *dst)
      44             : {
      45        2803 :   int result = 0;
      46             :   int idx;
      47             : 
      48        2803 :   if (elf == NULL)
      49             :     return -1;
      50             : 
      51        2803 :   if (unlikely (elf->kind != ELF_K_ELF))
      52             :     {
      53           0 :       __libelf_seterrno (ELF_E_INVALID_HANDLE);
      54           0 :       return -1;
      55             :     }
      56             : 
      57        2803 :   idx = elf->state.elf.scns_last->cnt;
      58        2803 :   if (idx != 0
      59          18 :       || (elf->state.elf.scns_last
      60             :           != (elf->class == ELFCLASS32
      61             :               || (offsetof (Elf, state.elf32.scns)
      62             :                   == offsetof (Elf, state.elf64.scns))
      63          18 :               ? &elf->state.elf32.scns : &elf->state.elf64.scns)))
      64             :     /* There is at least one section.  */
      65        2785 :     *dst = 1 + elf->state.elf.scns_last->data[idx - 1].index;
      66             :   else
      67          18 :     *dst = 0;
      68             : 
      69             :   return result;
      70             : }
      71             : 
      72             : int
      73        1498 : elf_getshdrnum (Elf *elf, size_t *dst)
      74             : {
      75             :   int result;
      76             : 
      77        1498 :   if (elf == NULL)
      78             :     return -1;
      79             : 
      80             :   rwlock_rdlock (elf->lock);
      81        1498 :   result = __elf_getshdrnum_rdlock (elf, dst);
      82             :   rwlock_unlock (elf->lock);
      83             : 
      84        1498 :   return result;
      85             : }
      86             : /* Alias for the deprecated name.  */
      87             : strong_alias (elf_getshdrnum, elf_getshnum)