Line data    Source code

       1             : /* Conversion functions for notes.
       2             :    Copyright (C) 2007, 2009, 2014 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             : 
       5             :    This file is free software; you can redistribute it and/or modify
       6             :    it under the terms of either
       7             : 
       8             :      * the GNU Lesser General Public License as published by the Free
       9             :        Software Foundation; either version 3 of the License, or (at
      10             :        your option) any later version
      11             : 
      12             :    or
      13             : 
      14             :      * the GNU General Public License as published by the Free
      15             :        Software Foundation; either version 2 of the License, or (at
      16             :        your option) any later version
      17             : 
      18             :    or both in parallel, as here.
      19             : 
      20             :    elfutils is distributed in the hope that it will be useful, but
      21             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      22             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      23             :    General Public License for more details.
      24             : 
      25             :    You should have received copies of the GNU General Public License and
      26             :    the GNU Lesser General Public License along with this program.  If
      27             :    not, see <http://www.gnu.org/licenses/>.  */
      28             : 
      29             : static void
      30         309 : elf_cvt_note (void *dest, const void *src, size_t len, int encode)
      31             : {
      32             :   assert (sizeof (Elf32_Nhdr) == sizeof (Elf64_Nhdr));
      33             : 
      34        1078 :   while (len >= sizeof (Elf32_Nhdr))
      35             :     {
      36             :       (1 ? Elf32_cvt_Nhdr : Elf64_cvt_Nhdr) (dest, src, sizeof (Elf32_Nhdr),
      37             :                                              encode);
      38         460 :       const Elf32_Nhdr *n = encode ? src : dest;
      39         460 :       Elf32_Word namesz = NOTE_ALIGN (n->n_namesz);
      40         460 :       Elf32_Word descsz = NOTE_ALIGN (n->n_descsz);
      41             : 
      42         460 :       len -= sizeof *n;
      43         460 :       src += sizeof *n;
      44         460 :       dest += sizeof *n;
      45             : 
      46         460 :       if (namesz > len)
      47             :         break;
      48         460 :       len -= namesz;
      49         460 :       if (descsz > len)
      50             :         break;
      51         460 :       len -= descsz;
      52             : 
      53         460 :       if (src != dest)
      54         458 :         memcpy (dest, src, namesz + descsz);
      55             : 
      56         460 :       src += namesz + descsz;
      57         460 :       dest += namesz + descsz;
      58             :     }
      59             : 
      60             :     /* Copy opver any leftover data unconcerted.  Probably part of
      61             :        truncated name/desc data.  */
      62         309 :     if (unlikely (len > 0) && src != dest)
      63             :       memcpy (dest, src, len);
      64         309 : }