Line data    Source code

       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             : const char *
      45         178 : ppc64_init (Elf *elf __attribute__ ((unused)),
      46             :             GElf_Half machine __attribute__ ((unused)),
      47             :             Ebl *eh,
      48             :             size_t ehlen)
      49             : {
      50             :   /* Check whether the Elf_BH object has a sufficent size.  */
      51         178 :   if (ehlen < sizeof (Ebl))
      52             :     return NULL;
      53             : 
      54             :   /* We handle it.  */
      55         178 :   ppc64_init_reloc (eh);
      56         178 :   HOOK (eh, reloc_simple_type);
      57         178 :   HOOK (eh, dynamic_tag_name);
      58         178 :   HOOK (eh, dynamic_tag_check);
      59         178 :   HOOK (eh, machine_flag_check);
      60         178 :   HOOK (eh, copy_reloc_p);
      61         178 :   HOOK (eh, check_special_symbol);
      62         178 :   HOOK (eh, check_st_other_bits);
      63         178 :   HOOK (eh, bss_plt_p);
      64         178 :   HOOK (eh, return_value_location);
      65         178 :   HOOK (eh, register_info);
      66         178 :   HOOK (eh, syscall_abi);
      67         178 :   HOOK (eh, core_note);
      68         178 :   HOOK (eh, auxv_info);
      69         178 :   HOOK (eh, check_object_attribute);
      70         178 :   HOOK (eh, abi_cfi);
      71             :   /* gcc/config/ #define DWARF_FRAME_REGISTERS.  */
      72         178 :   eh->frame_nregs = (114 - 1) + 32;
      73         178 :   HOOK (eh, set_initial_registers_tid);
      74         178 :   HOOK (eh, dwarf_to_regno);
      75         178 :   HOOK (eh, unwind);
      76         178 :   HOOK (eh, resolve_sym_value);
      77             : 
      78             :   /* Find the function descriptor .opd table for resolve_sym_value.  */
      79         178 :   if (elf != NULL)
      80             :     {
      81         178 :       GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem);
      82         178 :       size_t shstrndx;
      83         178 :       if (ehdr != NULL && ehdr->e_type != ET_REL
      84          80 :           && elf_getshdrstrndx (elf, &shstrndx) == 0)
      85             :         {
      86             :           /* We could also try through DT_PPC64_OPD and DT_PPC64_OPDSZ. */
      87             :           GElf_Shdr opd_shdr_mem, *opd_shdr;
      88             :           Elf_Scn *scn = NULL;
      89        1180 :           while ((scn = elf_nextscn (elf, scn)) != NULL)
      90             :             {
      91        1133 :               opd_shdr = gelf_getshdr (scn, &opd_shdr_mem);
      92        1133 :               if (opd_shdr != NULL
      93        1133 :                   && (opd_shdr->sh_flags & SHF_ALLOC) != 0
      94         877 :                   && opd_shdr->sh_type == SHT_PROGBITS
      95         416 :                   && opd_shdr->sh_size > 0)
      96             :                 {
      97        1155 :                   const char *name = elf_strptr (elf, shstrndx,
      98         385 :                                                  opd_shdr->sh_name);
      99         385 :                   if (name != NULL && strcmp (name, ".opd") == 0)
     100             :                     {
     101          33 :                       eh->fd_addr = opd_shdr->sh_addr;
     102          33 :                       eh->fd_data = elf_getdata (scn, NULL);
     103          33 :                       break;
     104             :                     }
     105             :                 }
     106             :             }
     107             :         }
     108             :     }
     109             : 
     110             :   return MODVERSION;
     111             : }