Line data    Source code

       1             : /* Report build ID information for a module.
       2             :    Copyright (C) 2007, 2008 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             : #include "libdwflP.h"
      30             : 
      31             : // XXX vs report changed module: punting old file
      32             : int
      33         107 : dwfl_module_report_build_id (Dwfl_Module *mod,
      34             :                              const unsigned char *bits, size_t len,
      35             :                              GElf_Addr vaddr)
      36             : {
      37         107 :   if (mod == NULL)
      38             :     return -1;
      39             : 
      40         107 :   if (mod->main.elf != NULL)
      41             :     {
      42             :       /* Once we know about a file, we won't take any lies about
      43             :          its contents.  The only permissible call is a no-op.  */
      44             : 
      45           0 :       if ((size_t) mod->build_id_len == len
      46           0 :           && (mod->build_id_vaddr == vaddr || vaddr == 0)
      47           0 :           && !memcmp (bits, mod->build_id_bits, len))
      48             :         return 0;
      49             : 
      50           0 :       __libdwfl_seterrno (DWFL_E_ALREADY_ELF);
      51           0 :       return -1;
      52             :     }
      53             : 
      54         107 :   if (vaddr != 0 && (vaddr < mod->low_addr || vaddr + len > mod->high_addr))
      55             :     {
      56           0 :       __libdwfl_seterrno (DWFL_E_ADDR_OUTOFRANGE);
      57           0 :       return -1;
      58             :     }
      59             : 
      60         107 :   void *copy = NULL;
      61         107 :   if (len > 0)
      62             :     {
      63         107 :       copy = malloc (len);
      64         107 :       if (unlikely (copy == NULL))
      65             :         {
      66           0 :           __libdwfl_seterrno (DWFL_E_NOMEM);
      67           0 :           return -1;
      68             :         }
      69         107 :       memcpy (copy, bits, len);
      70             :     }
      71             : 
      72         107 :   free (mod->build_id_bits);
      73             : 
      74         107 :   mod->build_id_bits = copy;
      75         107 :   mod->build_id_len = len;
      76         107 :   mod->build_id_vaddr = vaddr;
      77             : 
      78         107 :   return 0;
      79             : }
      80             : INTDEF (dwfl_module_report_build_id)