bfd/coff-aux.c

   1 /* BFD back-end for Apple M68K COFF A/UX 3.x files.
   2    Copyright 1996, 1997 Free Software Foundation, Inc.
   3    Written by Richard Henderson <rth@tamu.edu>.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #define TARGET_SYM      m68kaux_coff_vec
  22 #define TARGET_NAME     "coff-m68k-aux"
  23
  24 #ifndef TARG_AUX
  25 #define TARG_AUX
  26 #endif
  27
  28 #define COFF_LONG_FILENAMES
  29
  30 /* 4k pages */
  31 #define COFF_PAGE_SIZE 0x1000
  32
  33 /* On AUX, a STYP_NOLOAD|STYP_BSS section is part of a shared library. */
  34 #define BSS_NOLOAD_IS_SHARED_LIBRARY
  35
  36 #define STATIC_RELOCS
  37
  38 #define COFF_COMMON_ADDEND
  39
  40 #include "bfd.h"
  41 #include "sysdep.h"
  42
  43 static boolean coff_m68k_aux_link_add_one_symbol
  44   PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword,
  45            asection *, bfd_vma, const char *, boolean, boolean,
  46            struct bfd_link_hash_entry **));
  47
  48 #define coff_link_add_one_symbol coff_m68k_aux_link_add_one_symbol
  49
  50 #include "coff/aux-coff.h"  /* override coff/internal.h and coff/m68k.h */
  51 #include "coff-m68k.c"
  52
  53 /* We need non-absolute symbols to override absolute symbols.  This
  54    mirrors Apple's "solution" to let a static library symbol override
  55    a shared library symbol.  On the whole not a good thing, given how
  56    shared libraries work here, but can work if you are careful with
  57    what you include in the shared object. */
  58
  59 static boolean
  60 coff_m68k_aux_link_add_one_symbol (info, abfd, name, flags, section, value,
  61                                    string, copy, collect, hashp)
  62      struct bfd_link_info *info;
  63      bfd *abfd;
  64      const char *name;
  65      flagword flags;
  66      asection *section;
  67      bfd_vma value;
  68      const char *string;
  69      boolean copy;
  70      boolean collect;
  71      struct bfd_link_hash_entry **hashp;
  72 {
  73   struct bfd_link_hash_entry *h;
  74
  75   if ((flags & (BSF_WARNING | BSF_CONSTRUCTOR | BSF_WEAK)) == 0 &&
  76       !bfd_is_und_section (section) &&
  77       !bfd_is_com_section (section))
  78     {
  79       /* The new symbol is a definition or an indirect definition */
  80
  81       /* This bit copied from linker.c */
  82       if (hashp != NULL && *hashp != NULL)
  83         {
  84           h = *hashp;
  85           BFD_ASSERT (strcmp (h->root.string, name) == 0);
  86         }
  87       else
  88         {
  89           h = bfd_link_hash_lookup (info->hash, name, true, copy, false);
  90           if (h == NULL)
  91             {
  92               if (hashp != NULL)
  93                 *hashp = NULL;
  94               return false;
  95             }
  96         }
  97
  98       if (info->notice_hash != (struct bfd_hash_table *) NULL
  99           && (bfd_hash_lookup (info->notice_hash, name, false, false)
 100               != (struct bfd_hash_entry *) NULL))
 101         {
 102           if (! (*info->callbacks->notice) (info, name, abfd, section, value))
 103             return false;
 104         }
 105
 106       if (hashp != (struct bfd_link_hash_entry **) NULL)
 107         *hashp = h;
 108       /* end duplication from linker.c */
 109
 110       if (h->type == bfd_link_hash_defined
 111           || h->type == bfd_link_hash_indirect)
 112         {
 113           asection *msec;
 114
 115           if (h->type == bfd_link_hash_defined)
 116             msec = h->u.def.section;
 117           else
 118             msec = bfd_ind_section_ptr;
 119
 120           if (bfd_is_abs_section (msec) && !bfd_is_abs_section (section))
 121             {
 122               h->u.def.section = section;
 123               h->u.def.value = value;
 124               return true;
 125             }
 126           else if (bfd_is_abs_section (section) && !bfd_is_abs_section (msec))
 127             return true;
 128         }
 129     }
 130
 131   /* If we didn't exit early, finish processing in the generic routine */
 132   return _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 133                                            value, string, copy, collect,
 134                                            hashp);
 135 }