LCOV - code coverage report
Current view: top level - libelf - gelf_update_rel.c (source / functions) Hit Total Coverage
Test: elfutils-0.189 Lines: 22 32 68.8 %
Date: 2023-10-25 13:46:23 Functions: 1 1 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 7 16 43.8 %

           Branch data     Line data    Source code
       1                 :            : /* Update REL relocation information at given index.
       2                 :            :    Copyright (C) 2000, 2001, 2002, 2005, 2009, 2014 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            :    Written by Ulrich Drepper <drepper@redhat.com>, 2000.
       5                 :            : 
       6                 :            :    This file is free software; you can redistribute it and/or modify
       7                 :            :    it under the terms of either
       8                 :            : 
       9                 :            :      * the GNU Lesser General Public License as published by the Free
      10                 :            :        Software Foundation; either version 3 of the License, or (at
      11                 :            :        your option) any later version
      12                 :            : 
      13                 :            :    or
      14                 :            : 
      15                 :            :      * the GNU General Public License as published by the Free
      16                 :            :        Software Foundation; either version 2 of the License, or (at
      17                 :            :        your option) any later version
      18                 :            : 
      19                 :            :    or both in parallel, as here.
      20                 :            : 
      21                 :            :    elfutils is distributed in the hope that it will be useful, but
      22                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24                 :            :    General Public License for more details.
      25                 :            : 
      26                 :            :    You should have received copies of the GNU General Public License and
      27                 :            :    the GNU Lesser General Public License along with this program.  If
      28                 :            :    not, see <http://www.gnu.org/licenses/>.  */
      29                 :            : 
      30                 :            : #ifdef HAVE_CONFIG_H
      31                 :            : # include <config.h>
      32                 :            : #endif
      33                 :            : 
      34                 :            : #include <gelf.h>
      35                 :            : #include <stdlib.h>
      36                 :            : 
      37                 :            : #include "libelfP.h"
      38                 :            : 
      39                 :            : 
      40                 :            : int
      41                 :      50534 : gelf_update_rel (Elf_Data *dst, int ndx, GElf_Rel *src)
      42                 :            : {
      43                 :      50534 :   Elf_Data_Scn *data_scn = (Elf_Data_Scn *) dst;
      44                 :      50534 :   Elf_Scn *scn;
      45                 :      50534 :   int result = 0;
      46                 :            : 
      47         [ -  + ]:      50534 :   if (dst == NULL)
      48                 :            :     return 0;
      49                 :            : 
      50         [ -  + ]:      50534 :   if (unlikely (data_scn->d.d_type != ELF_T_REL))
      51                 :            :     {
      52                 :            :       /* The type of the data better should match.  */
      53                 :          0 :       __libelf_seterrno (ELF_E_DATA_MISMATCH);
      54                 :          0 :       return 0;
      55                 :            :     }
      56                 :            : 
      57                 :      50534 :   scn = data_scn->s;
      58                 :      50534 :   rwlock_wrlock (scn->elf->lock);
      59                 :            : 
      60         [ +  - ]:      50534 :   if (scn->elf->class == ELFCLASS32)
      61                 :            :     {
      62                 :      50534 :       Elf32_Rel *rel;
      63                 :            : 
      64                 :            :       /* There is the possibility that the values in the input are
      65                 :            :          too large.  */
      66         [ +  - ]:      50534 :       if (unlikely (src->r_offset > 0xffffffffull)
      67         [ +  - ]:      50534 :           || unlikely (GELF_R_SYM (src->r_info) > 0xffffff)
      68         [ -  + ]:      50534 :           || unlikely (GELF_R_TYPE (src->r_info) > 0xff))
      69                 :            :         {
      70                 :          0 :           __libelf_seterrno (ELF_E_INVALID_DATA);
      71                 :          0 :           goto out;
      72                 :            :         }
      73                 :            : 
      74                 :            :       /* Check whether we have to resize the data buffer.  */
      75         [ -  + ]:      50534 :       if (INVALID_NDX (ndx, Elf32_Rel, &data_scn->d))
      76                 :            :         {
      77                 :          0 :           __libelf_seterrno (ELF_E_INVALID_INDEX);
      78                 :          0 :           goto out;
      79                 :            :         }
      80                 :            : 
      81                 :      50534 :       rel = &((Elf32_Rel *) data_scn->d.d_buf)[ndx];
      82                 :            : 
      83                 :      50534 :       rel->r_offset = src->r_offset;
      84                 :      50534 :       rel->r_info = ELF32_R_INFO (GELF_R_SYM (src->r_info),
      85                 :            :                                   GELF_R_TYPE (src->r_info));
      86                 :            :     }
      87                 :            :   else
      88                 :            :     {
      89                 :            :       /* Check whether we have to resize the data buffer.  */
      90         [ #  # ]:          0 :       if (INVALID_NDX (ndx, Elf64_Rel, &data_scn->d))
      91                 :            :         {
      92                 :          0 :           __libelf_seterrno (ELF_E_INVALID_INDEX);
      93                 :          0 :           goto out;
      94                 :            :         }
      95                 :            : 
      96                 :          0 :       ((Elf64_Rel *) data_scn->d.d_buf)[ndx] = *src;
      97                 :            :     }
      98                 :            : 
      99                 :      50534 :   result = 1;
     100                 :            : 
     101                 :            :   /* Mark the section as modified.  */
     102                 :      50534 :   scn->flags |= ELF_F_DIRTY;
     103                 :            : 
     104                 :      50534 :  out:
     105                 :      50534 :   rwlock_unlock (scn->elf->lock);
     106                 :            : 
     107                 :      50534 :   return result;
     108                 :            : }

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