bfd/coff-aux.c

   1 /* BFD back-end for Apple M68K COFF A/UX 3.x files.
   2    Copyright 1996, 1997, 2000, 2002, 2005, 2007, 2008, 2011, 2012
   3    Free Software Foundation, Inc.
   4    Written by Richard Henderson <rth@tamu.edu>.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #define TARGET_SYM      m68kaux_coff_vec
  24 #define TARGET_NAME     "coff-m68k-aux"
  25
  26 #ifndef TARG_AUX
  27 #define TARG_AUX
  28 #endif
  29
  30 #define COFF_LONG_FILENAMES
  31
  32 /* 4k pages */
  33 #define COFF_PAGE_SIZE 0x1000
  34
  35 /* On AUX, a STYP_NOLOAD|STYP_BSS section is part of a shared library.  */
  36 #define BSS_NOLOAD_IS_SHARED_LIBRARY
  37
  38 #define STATIC_RELOCS
  39
  40 #define COFF_COMMON_ADDEND
  41
  42 #include "sysdep.h"
  43 #include "bfd.h"
  44
  45 #define coff_link_add_one_symbol coff_m68k_aux_link_add_one_symbol
  46 static bfd_boolean
  47 coff_m68k_aux_link_add_one_symbol
  48   (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
  49    bfd_vma, const char *, bfd_boolean, bfd_boolean,
  50    struct bfd_link_hash_entry **);
  51
  52 #ifndef bfd_pe_print_pdata
  53 #define bfd_pe_print_pdata      NULL
  54 #endif
  55
  56 #include "coff/aux-coff.h"  /* override coff/internal.h and coff/m68k.h */
  57 #include "coff-m68k.c"
  58
  59 /* We need non-absolute symbols to override absolute symbols.  This
  60    mirrors Apple's "solution" to let a static library symbol override
  61    a shared library symbol.  On the whole not a good thing, given how
  62    shared libraries work here, but can work if you are careful with
  63    what you include in the shared object.  */
  64
  65 static bfd_boolean
  66 coff_m68k_aux_link_add_one_symbol (struct bfd_link_info *info,
  67                                    bfd *abfd,
  68                                    const char *name,
  69                                    flagword flags,
  70                                    asection *section,
  71                                    bfd_vma value,
  72                                    const char *string,
  73                                    bfd_boolean copy,
  74                                    bfd_boolean collect,
  75                                    struct bfd_link_hash_entry **hashp)
  76 {
  77   struct bfd_link_hash_entry *h;
  78
  79   if ((flags & (BSF_WARNING | BSF_CONSTRUCTOR | BSF_WEAK)) == 0 &&
  80       !bfd_is_und_section (section) &&
  81       !bfd_is_com_section (section))
  82     {
  83       /* The new symbol is a definition or an indirect definition */
  84
  85       /* This bit copied from linker.c */
  86       if (hashp != NULL && *hashp != NULL)
  87         {
  88           h = *hashp;
  89           BFD_ASSERT (strcmp (h->root.string, name) == 0);
  90         }
  91       else
  92         {
  93           h = bfd_link_hash_lookup (info->hash, name, TRUE, copy, FALSE);
  94           if (h == NULL)
  95             {
  96               if (hashp != NULL)
  97                 *hashp = NULL;
  98               return FALSE;
  99             }
 100         }
 101
 102       if (info->notice_hash != (struct bfd_hash_table *) NULL
 103           && (bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE)
 104               != (struct bfd_hash_entry *) NULL))
 105         {
 106           if (! (*info->callbacks->notice) (info, h, abfd, section, value,
 107                                             flags, string))
 108             return FALSE;
 109         }
 110
 111       if (hashp != (struct bfd_link_hash_entry **) NULL)
 112         *hashp = h;
 113       /* end duplication from linker.c */
 114
 115       if (h->type == bfd_link_hash_defined
 116           || h->type == bfd_link_hash_indirect)
 117         {
 118           asection *msec;
 119
 120           if (h->type == bfd_link_hash_defined)
 121             msec = h->u.def.section;
 122           else
 123             msec = bfd_ind_section_ptr;
 124
 125           if (bfd_is_abs_section (msec) && !bfd_is_abs_section (section))
 126             {
 127               h->u.def.section = section;
 128               h->u.def.value = value;
 129               return TRUE;
 130             }
 131           else if (bfd_is_abs_section (section) && !bfd_is_abs_section (msec))
 132             return TRUE;
 133         }
 134     }
 135
 136   /* If we didn't exit early, finish processing in the generic routine */
 137   return _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 138                                            value, string, copy, collect,
 139                                            hashp);
 140 }