LCOV - code coverage report
Current view: top level - libelf - gelf_update_phdr.c (source / functions) Hit Total Coverage
Test: elfutils-0.190 Lines: 32 52 61.5 %
Date: 2023-11-14 21:22:18 Functions: 1 1 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 14 42 33.3 %

           Branch data     Line data    Source code
       1                 :            : /* Update program header program header table entry.
       2                 :            :    Copyright (C) 2000-2010 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 <string.h>
      36                 :            : 
      37                 :            : #include "libelfP.h"
      38                 :            : 
      39                 :            : 
      40                 :            : int
      41                 :       4416 : gelf_update_phdr (Elf *elf, int ndx, GElf_Phdr *src)
      42                 :            : {
      43                 :       4416 :   int result = 0;
      44                 :            : 
      45         [ -  + ]:       4416 :   if (elf == NULL)
      46                 :            :     return 0;
      47                 :            : 
      48         [ -  + ]:       4416 :   if (unlikely (elf->kind != ELF_K_ELF))
      49                 :            :     {
      50                 :          0 :       __libelf_seterrno (ELF_E_INVALID_HANDLE);
      51                 :          0 :       return 0;
      52                 :            :     }
      53                 :            : 
      54                 :       4416 :   rwlock_wrlock (elf->lock);
      55                 :            : 
      56         [ +  + ]:       4416 :   if (elf->class == ELFCLASS32)
      57                 :            :     {
      58                 :       1494 :       Elf32_Phdr *phdr = elf->state.elf32.phdr;
      59                 :            : 
      60                 :            :       /* We have to convert the data to the 32 bit format.  This might
      61                 :            :          overflow some fields so we have to test for this case before
      62                 :            :          copying.  */
      63         [ +  - ]:       1494 :       if (unlikely (src->p_offset > 0xffffffffull)
      64         [ +  - ]:       1494 :           || unlikely (src->p_vaddr > 0xffffffffull)
      65         [ +  - ]:       1494 :           || unlikely (src->p_paddr > 0xffffffffull)
      66         [ +  - ]:       1494 :           || unlikely (src->p_filesz > 0xffffffffull)
      67         [ +  - ]:       1494 :           || unlikely (src->p_memsz > 0xffffffffull)
      68         [ -  + ]:       1494 :           || unlikely (src->p_align > 0xffffffffull))
      69                 :            :         {
      70                 :          0 :           __libelf_seterrno (ELF_E_INVALID_DATA);
      71                 :          0 :           goto out;
      72                 :            :         }
      73                 :            : 
      74         [ -  + ]:       1494 :       if (phdr == NULL)
      75                 :            :         {
      76                 :          0 :           phdr = __elf32_getphdr_wrlock (elf);
      77         [ #  # ]:          0 :           if (phdr == NULL)
      78                 :            :             /* The error number is already set.  */
      79                 :          0 :             goto out;
      80                 :            :         }
      81                 :            : 
      82                 :            :       /* Test whether the index is ok.  */
      83                 :       1494 :       size_t phnum;
      84         [ -  + ]:       1494 :       if (ndx >= elf->state.elf32.ehdr->e_phnum
      85         [ #  # ]:          0 :           && (elf->state.elf32.ehdr->e_phnum != PN_XNUM
      86         [ #  # ]:          0 :               || __elf_getphdrnum_rdlock (elf, &phnum) != 0
      87         [ #  # ]:          0 :               || (size_t) ndx >= phnum))
      88                 :            :         {
      89                 :          0 :           __libelf_seterrno (ELF_E_INVALID_INDEX);
      90                 :          0 :           goto out;
      91                 :            :         }
      92                 :            : 
      93                 :            :       /* Now correct the pointer to point to the correct element.  */
      94                 :       1494 :       phdr += ndx;
      95                 :            : 
      96                 :            : #define COPY(name) \
      97                 :            :       phdr->name = src->name
      98                 :       1494 :       COPY (p_type);
      99                 :       1494 :       COPY (p_offset);
     100                 :       1494 :       COPY (p_vaddr);
     101                 :       1494 :       COPY (p_paddr);
     102                 :       1494 :       COPY (p_filesz);
     103                 :       1494 :       COPY (p_memsz);
     104                 :       1494 :       COPY (p_flags);
     105                 :       1494 :       COPY (p_align);
     106                 :            :     }
     107                 :            :   else
     108                 :            :     {
     109                 :       2922 :       Elf64_Phdr *phdr = elf->state.elf64.phdr;
     110                 :            : 
     111         [ -  + ]:       2922 :       if (phdr == NULL)
     112                 :            :         {
     113                 :          0 :           phdr = __elf64_getphdr_wrlock (elf);
     114         [ #  # ]:          0 :           if (phdr == NULL)
     115                 :            :             /* The error number is already set.  */
     116                 :          0 :             goto out;
     117                 :            :         }
     118                 :            : 
     119                 :            :       /* Test whether the index is ok.  */
     120                 :       2922 :       size_t phnum;
     121         [ -  + ]:       2922 :       if (ndx >= elf->state.elf64.ehdr->e_phnum
     122         [ #  # ]:          0 :           && (elf->state.elf64.ehdr->e_phnum != PN_XNUM
     123         [ #  # ]:          0 :               || __elf_getphdrnum_rdlock (elf, &phnum) != 0
     124         [ #  # ]:          0 :               || (size_t) ndx >= phnum))
     125                 :            :         {
     126                 :          0 :           __libelf_seterrno (ELF_E_INVALID_INDEX);
     127                 :          0 :           goto out;
     128                 :            :         }
     129                 :            : 
     130                 :            :       /* Just copy the data.  */
     131                 :       2922 :       memcpy (phdr + ndx, src, sizeof (Elf64_Phdr));
     132                 :            :     }
     133                 :            : 
     134                 :            :   /* Mark the program header as modified.  */
     135                 :       4416 :   elf->state.elf.phdr_flags |= ELF_F_DIRTY;
     136                 :            : 
     137                 :       4416 :   result = 1;
     138                 :            : 
     139                 :            :  out:
     140                 :            :   rwlock_unlock (elf->lock);
     141                 :            : 
     142                 :            :   return result;
     143                 :            : }

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