bfd/coff-aux.c

   1 /* BFD back-end for Apple M68K COFF A/UX 3.x files.
   2    Copyright 1996, 1997, 2000, 2002, 2007 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #define TARGET_SYM      m68kaux_coff_vec
  23 #define TARGET_NAME     "coff-m68k-aux"
  24
  25 #ifndef TARG_AUX
  26 #define TARG_AUX
  27 #endif
  28
  29 #define COFF_LONG_FILENAMES
  30
  31 /* 4k pages */
  32 #define COFF_PAGE_SIZE 0x1000
  33
  34 /* On AUX, a STYP_NOLOAD|STYP_BSS section is part of a shared library.  */
  35 #define BSS_NOLOAD_IS_SHARED_LIBRARY
  36
  37 #define STATIC_RELOCS
  38
  39 #define COFF_COMMON_ADDEND
  40
  41 #include "sysdep.h"
  42 #include "bfd.h"
  43
  44 static bfd_boolean coff_m68k_aux_link_add_one_symbol
  45   PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword,
  46            asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
  47            struct bfd_link_hash_entry **));
  48
  49 #define coff_link_add_one_symbol coff_m68k_aux_link_add_one_symbol
  50
  51 #include "coff/aux-coff.h"  /* override coff/internal.h and coff/m68k.h */
  52 #include "coff-m68k.c"
  53
  54 /* We need non-absolute symbols to override absolute symbols.  This
  55    mirrors Apple's "solution" to let a static library symbol override
  56    a shared library symbol.  On the whole not a good thing, given how
  57    shared libraries work here, but can work if you are careful with
  58    what you include in the shared object.  */
  59
  60 static bfd_boolean
  61 coff_m68k_aux_link_add_one_symbol (info, abfd, name, flags, section, value,
  62                                    string, copy, collect, hashp)
  63      struct bfd_link_info *info;
  64      bfd *abfd;
  65      const char *name;
  66      flagword flags;
  67      asection *section;
  68      bfd_vma value;
  69      const char *string;
  70      bfd_boolean copy;
  71      bfd_boolean collect;
  72      struct bfd_link_hash_entry **hashp;
  73 {
  74   struct bfd_link_hash_entry *h;
  75
  76   if ((flags & (BSF_WARNING | BSF_CONSTRUCTOR | BSF_WEAK)) == 0 &&
  77       !bfd_is_und_section (section) &&
  78       !bfd_is_com_section (section))
  79     {
  80       /* The new symbol is a definition or an indirect definition */
  81
  82       /* This bit copied from linker.c */
  83       if (hashp != NULL && *hashp != NULL)
  84         {
  85           h = *hashp;
  86           BFD_ASSERT (strcmp (h->root.string, name) == 0);
  87         }
  88       else
  89         {
  90           h = bfd_link_hash_lookup (info->hash, name, TRUE, copy, FALSE);
  91           if (h == NULL)
  92             {
  93               if (hashp != NULL)
  94                 *hashp = NULL;
  95               return FALSE;
  96             }
  97         }
  98
  99       if (info->notice_hash != (struct bfd_hash_table *) NULL
 100           && (bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE)
 101               != (struct bfd_hash_entry *) NULL))
 102         {
 103           if (! (*info->callbacks->notice) (info, name, abfd, section, value))
 104             return FALSE;
 105         }
 106
 107       if (hashp != (struct bfd_link_hash_entry **) NULL)
 108         *hashp = h;
 109       /* end duplication from linker.c */
 110
 111       if (h->type == bfd_link_hash_defined
 112           || h->type == bfd_link_hash_indirect)
 113         {
 114           asection *msec;
 115
 116           if (h->type == bfd_link_hash_defined)
 117             msec = h->u.def.section;
 118           else
 119             msec = bfd_ind_section_ptr;
 120
 121           if (bfd_is_abs_section (msec) && !bfd_is_abs_section (section))
 122             {
 123               h->u.def.section = section;
 124               h->u.def.value = value;
 125               return TRUE;
 126             }
 127           else if (bfd_is_abs_section (section) && !bfd_is_abs_section (msec))
 128             return TRUE;
 129         }
 130     }
 131
 132   /* If we didn't exit early, finish processing in the generic routine */
 133   return _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 134                                            value, string, copy, collect,
 135                                            hashp);
 136 }