LCOV - code coverage report
Current view: top level - backends - ppc64_resolve_sym.c (source / functions) Hit Total Coverage
Test: elfutils-0.179 Lines: 13 13 100.0 %
Date: 2020-03-30 14:24:38 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       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             : }

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