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       1                 :            : /* Initialization of PPC64 specific backend library.
       2                 :            :    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013, 2014 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            :    Written by Ulrich Drepper <drepper@redhat.com>, 2004.
       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 <string.h>
      35                 :            : 
      36                 :            : #define BACKEND         ppc64_
      37                 :            : #define RELOC_PREFIX    R_PPC64_
      38                 :            : #include "libebl_CPU.h"
      39                 :            : 
      40                 :            : /* This defines the common reloc hooks based on ppc64_reloc.def.  */
      41                 :            : #include "common-reloc.c"
      42                 :            : 
      43                 :            : 
      44                 :            : Ebl *
      45                 :        456 : ppc64_init (Elf *elf __attribute__ ((unused)),
      46                 :            :             GElf_Half machine __attribute__ ((unused)),
      47                 :            :             Ebl *eh)
      48                 :            : {
      49                 :            :   /* We handle it.  */
      50         [ +  - ]:        456 :   ppc64_init_reloc (eh);
      51                 :        456 :   HOOK (eh, reloc_simple_type);
      52                 :        456 :   HOOK (eh, dynamic_tag_name);
      53                 :        456 :   HOOK (eh, dynamic_tag_check);
      54                 :        456 :   HOOK (eh, machine_flag_check);
      55                 :        456 :   HOOK (eh, copy_reloc_p);
      56                 :        456 :   HOOK (eh, check_special_symbol);
      57                 :        456 :   HOOK (eh, check_st_other_bits);
      58                 :        456 :   HOOK (eh, bss_plt_p);
      59                 :        456 :   HOOK (eh, return_value_location);
      60                 :        456 :   HOOK (eh, register_info);
      61                 :        456 :   HOOK (eh, core_note);
      62                 :        456 :   HOOK (eh, auxv_info);
      63                 :        456 :   HOOK (eh, check_object_attribute);
      64                 :        456 :   HOOK (eh, abi_cfi);
      65                 :            :   /* gcc/config/ #define DWARF_FRAME_REGISTERS.  */
      66                 :        456 :   eh->frame_nregs = (114 - 1) + 32;
      67                 :        456 :   HOOK (eh, set_initial_registers_tid);
      68                 :        456 :   HOOK (eh, dwarf_to_regno);
      69                 :        456 :   HOOK (eh, unwind);
      70                 :        456 :   HOOK (eh, resolve_sym_value);
      71                 :            : 
      72                 :            :   /* Find the function descriptor .opd table for resolve_sym_value.  */
      73         [ +  - ]:        456 :   if (elf != NULL)
      74                 :            :     {
      75                 :        456 :       GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
      76                 :        456 :       size_t shstrndx;
      77   [ +  -  +  + ]:        456 :       if (ehdr != NULL && ehdr->e_type != ET_REL
      78         [ +  - ]:        292 :           && elf_getshdrstrndx (elf, &shstrndx) == 0)
      79                 :            :         {
      80                 :            :           /* We could also try through DT_PPC64_OPD and DT_PPC64_OPDSZ. */
      81                 :            :           GElf_Shdr opd_shdr_mem, *opd_shdr;
      82                 :            :           Elf_Scn *scn = NULL;
      83         [ +  + ]:       4120 :           while ((scn = elf_nextscn (elf, scn)) != NULL)
      84                 :            :             {
      85                 :       3938 :               opd_shdr = gelf_getshdr (scn, &opd_shdr_mem);
      86         [ +  - ]:       3938 :               if (opd_shdr != NULL
      87         [ +  + ]:       3938 :                   && (opd_shdr->sh_flags & SHF_ALLOC) != 0
      88         [ +  + ]:       2854 :                   && opd_shdr->sh_type == SHT_PROGBITS
      89         [ +  + ]:       1448 :                   && opd_shdr->sh_size > 0)
      90                 :            :                 {
      91                 :       2596 :                   const char *name = elf_strptr (elf, shstrndx,
      92                 :       1298 :                                                  opd_shdr->sh_name);
      93   [ +  -  +  + ]:       1298 :                   if (name != NULL && strcmp (name, ".opd") == 0)
      94                 :            :                     {
      95                 :        110 :                       eh->fd_addr = opd_shdr->sh_addr;
      96                 :        110 :                       eh->fd_data = elf_getdata (scn, NULL);
      97                 :        110 :                       break;
      98                 :            :                     }
      99                 :            :                 }
     100                 :            :             }
     101                 :            :         }
     102                 :            :     }
     103                 :            : 
     104                 :        456 :   return eh;
     105                 :            : }