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       1                 :            : /* Resolve symbol values through .opd function descriptors.
       2                 :            :    Copyright (C) 2013 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                 :            : #ifdef HAVE_CONFIG_H
      30                 :            : # include <config.h>
      31                 :            : #endif
      32                 :            : 
      33                 :            : #define BACKEND ppc64_
      34                 :            : #include "libebl_CPU.h"
      35                 :            : 
      36                 :            : /* Resolve a function descriptor if addr points into the .opd section.
      37                 :            :    The .opd section contains function descriptors consisting of 3 addresses.
      38                 :            :    function, toc and chain. We are just interested in the first.
      39                 :            :    http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html#FUNC-DES
      40                 :            : 
      41                 :            :    Returns true if the given address could be resolved, false otherwise.
      42                 :            : */
      43                 :            : bool
      44                 :      20295 : ppc64_resolve_sym_value (Ebl *ebl, GElf_Addr *addr)
      45                 :            : {
      46   [ +  +  +  + ]:      20295 :   if (ebl->fd_data != NULL && *addr >= ebl->fd_addr
      47         [ -  + ]:        715 :       && *addr + sizeof (Elf64_Addr) <= ebl->fd_addr + ebl->fd_data->d_size)
      48                 :            :     {
      49                 :        715 :       GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (ebl->elf, &ehdr_mem);
      50         [ +  - ]:        715 :       if (ehdr != NULL)
      51                 :            :         {
      52                 :        715 :           Elf_Data opd_in, opd_out;
      53                 :        715 :           opd_in.d_buf = ebl->fd_data->d_buf + (*addr - ebl->fd_addr);
      54                 :        715 :           opd_out.d_buf = addr;
      55                 :        715 :           opd_out.d_size = opd_in.d_size = sizeof (Elf64_Addr);
      56                 :        715 :           opd_out.d_type = opd_in.d_type = ELF_T_ADDR;
      57         [ +  - ]:        715 :           if (elf64_xlatetom (&opd_out, &opd_in,
      58                 :        715 :                               ehdr->e_ident[EI_DATA]) != NULL)
      59                 :        715 :             return true;
      60                 :            :         }
      61                 :            :     }
      62                 :            :   return false;
      63                 :            : }