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
   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 static bfd_boolean coff_m68k_aux_link_add_one_symbol
  46   PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword,
  47            asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
  48            struct bfd_link_hash_entry **));
  49
  50 #define coff_link_add_one_symbol coff_m68k_aux_link_add_one_symbol
  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 (info, abfd, name, flags, section, value,
  67                                    string, copy, collect, hashp)
  68      struct bfd_link_info *info;
  69      bfd *abfd;
  70      const char *name;
  71      flagword flags;
  72      asection *section;
  73      bfd_vma value;
  74      const char *string;
  75      bfd_boolean copy;
  76      bfd_boolean collect;
  77      struct bfd_link_hash_entry **hashp;
  78 {
  79   struct bfd_link_hash_entry *h;
  80
  81   if ((flags & (BSF_WARNING | BSF_CONSTRUCTOR | BSF_WEAK)) == 0 &&
  82       !bfd_is_und_section (section) &&
  83       !bfd_is_com_section (section))
  84     {
  85       /* The new symbol is a definition or an indirect definition */
  86
  87       /* This bit copied from linker.c */
  88       if (hashp != NULL && *hashp != NULL)
  89         {
  90           h = *hashp;
  91           BFD_ASSERT (strcmp (h->root.string, name) == 0);
  92         }
  93       else
  94         {
  95           h = bfd_link_hash_lookup (info->hash, name, TRUE, copy, FALSE);
  96           if (h == NULL)
  97             {
  98               if (hashp != NULL)
  99                 *hashp = NULL;
 100               return FALSE;
 101             }
 102         }
 103
 104       if (info->notice_hash != (struct bfd_hash_table *) NULL
 105           && (bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE)
 106               != (struct bfd_hash_entry *) NULL))
 107         {
 108           if (! (*info->callbacks->notice) (info, name, abfd, section, value))
 109             return FALSE;
 110         }
 111
 112       if (hashp != (struct bfd_link_hash_entry **) NULL)
 113         *hashp = h;
 114       /* end duplication from linker.c */
 115
 116       if (h->type == bfd_link_hash_defined
 117           || h->type == bfd_link_hash_indirect)
 118         {
 119           asection *msec;
 120
 121           if (h->type == bfd_link_hash_defined)
 122             msec = h->u.def.section;
 123           else
 124             msec = bfd_ind_section_ptr;
 125
 126           if (bfd_is_abs_section (msec) && !bfd_is_abs_section (section))
 127             {
 128               h->u.def.section = section;
 129               h->u.def.value = value;
 130               return TRUE;
 131             }
 132           else if (bfd_is_abs_section (section) && !bfd_is_abs_section (msec))
 133             return TRUE;
 134         }
 135     }
 136
 137   /* If we didn't exit early, finish processing in the generic routine */
 138   return _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 139                                            value, string, copy, collect,
 140                                            hashp);
 141 }