Branch data     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                 :         16 : dwfl_module_report_build_id (Dwfl_Module *mod,
      34                 :            :                              const unsigned char *bits, size_t len,
      35                 :            :                              GElf_Addr vaddr)
      36                 :            : {
      37         [ +  - ]:         16 :   if (mod == NULL)
      38                 :            :     return -1;
      39                 :            : 
      40         [ -  + ]:         16 :   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 [ +  - ][ +  - ]:         16 :   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                 :         16 :   void *copy = NULL;
      61         [ +  - ]:         16 :   if (len > 0)
      62                 :            :     {
      63                 :         16 :       copy = malloc (len);
      64         [ -  + ]:         16 :       if (unlikely (copy == NULL))
      65                 :            :         {
      66                 :          0 :           __libdwfl_seterrno (DWFL_E_NOMEM);
      67                 :          0 :           return -1;
      68                 :            :         }
      69                 :         16 :       memcpy (copy, bits, len);
      70                 :            :     }
      71                 :            : 
      72                 :         16 :   free (mod->build_id_bits);
      73                 :            : 
      74                 :         16 :   mod->build_id_bits = copy;
      75                 :         16 :   mod->build_id_len = len;
      76                 :         16 :   mod->build_id_vaddr = vaddr;
      77                 :            : 
      78                 :         16 :   return 0;
      79                 :            : }
      80                 :            : INTDEF (dwfl_module_report_build_id)