Line data    Source code

       1             : /* Return section header.
       2             :    Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 1998.
       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 <gelf.h>
      35             : #include <string.h>
      36             : 
      37             : #include "libelfP.h"
      38             : 
      39             : 
      40             : GElf_Shdr *
      41  1786500570 : gelf_getshdr (Elf_Scn *scn, GElf_Shdr *dst)
      42             : {
      43  1786500570 :   GElf_Shdr *result = NULL;
      44             : 
      45  1786500570 :   if (scn == NULL)
      46             :     return NULL;
      47             : 
      48  1786500209 :   if (dst == NULL)
      49             :     {
      50           0 :       __libelf_seterrno (ELF_E_INVALID_OPERAND);
      51           0 :       return NULL;
      52             :     }
      53             : 
      54  1786500209 :   rwlock_rdlock (scn->elf->lock);
      55             : 
      56  1786500209 :   if (scn->elf->class == ELFCLASS32)
      57             :     {
      58             :       /* Copy the elements one-by-one.  */
      59    13010542 :       Elf32_Shdr *shdr
      60     6505271 :         = scn->shdr.e32 ?: __elf32_getshdr_rdlock (scn);
      61             : 
      62     6505271 :       if (shdr == NULL)
      63             :         {
      64           0 :           __libelf_seterrno (ELF_E_INVALID_OPERAND);
      65           0 :           goto out;
      66             :         }
      67             : 
      68             : #define COPY(name) \
      69             :       dst->name = shdr->name
      70     6505271 :       COPY (sh_name);
      71     6505271 :       COPY (sh_type);
      72     6505271 :       COPY (sh_flags);
      73     6505271 :       COPY (sh_addr);
      74     6505271 :       COPY (sh_offset);
      75     6505271 :       COPY (sh_size);
      76     6505271 :       COPY (sh_link);
      77     6505271 :       COPY (sh_info);
      78     6505271 :       COPY (sh_addralign);
      79     6505271 :       COPY (sh_entsize);
      80             : 
      81     6505271 :       result = dst;
      82             :     }
      83             :   else
      84             :     {
      85  3559989876 :       Elf64_Shdr *shdr
      86  1779994938 :         = scn->shdr.e64 ?: __elf64_getshdr_rdlock (scn);
      87             : 
      88  1779994938 :       if (shdr == NULL)
      89             :         {
      90           0 :           __libelf_seterrno (ELF_E_INVALID_OPERAND);
      91           0 :           goto out;
      92             :         }
      93             : 
      94             :       /* We only have to copy the data.  */
      95  3559989876 :       result = memcpy (dst, shdr, sizeof (GElf_Shdr));
      96             :     }
      97             : 
      98  1786500209 :  out:
      99  1786500209 :   rwlock_unlock (scn->elf->lock);
     100             : 
     101  1786500209 :   return result;
     102             : }
     103             : INTDEF(gelf_getshdr)