bfd/coff-aux.c

   1 /* BFD back-end for Apple M68K COFF A/UX 3.x files.
   2    Copyright (C) 1996-2014 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 #define coff_link_add_one_symbol coff_m68k_aux_link_add_one_symbol
  45 static bfd_boolean
  46 coff_m68k_aux_link_add_one_symbol
  47   (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
  48    bfd_vma, const char *, bfd_boolean, bfd_boolean,
  49    struct bfd_link_hash_entry **);
  50
  51 #ifndef bfd_pe_print_pdata
  52 #define bfd_pe_print_pdata      NULL
  53 #endif
  54
  55 #include "coff/aux-coff.h"  /* override coff/internal.h and coff/m68k.h */
  56 #include "coff-m68k.c"
  57
  58 /* We need non-absolute symbols to override absolute symbols.  This
  59    mirrors Apple's "solution" to let a static library symbol override
  60    a shared library symbol.  On the whole not a good thing, given how
  61    shared libraries work here, but can work if you are careful with
  62    what you include in the shared object.  */
  63
  64 static bfd_boolean
  65 coff_m68k_aux_link_add_one_symbol (struct bfd_link_info *info,
  66                                    bfd *abfd,
  67                                    const char *name,
  68                                    flagword flags,
  69                                    asection *section,
  70                                    bfd_vma value,
  71                                    const char *string,
  72                                    bfd_boolean copy,
  73                                    bfd_boolean collect,
  74                                    struct bfd_link_hash_entry **hashp)
  75 {
  76   struct bfd_link_hash_entry *h;
  77
  78   if ((flags & (BSF_WARNING | BSF_CONSTRUCTOR | BSF_WEAK)) == 0 &&
  79       !bfd_is_und_section (section) &&
  80       !bfd_is_com_section (section))
  81     {
  82       /* The new symbol is a definition or an indirect definition */
  83
  84       /* This bit copied from linker.c */
  85       if (hashp != NULL && *hashp != NULL)
  86         {
  87           h = *hashp;
  88           BFD_ASSERT (strcmp (h->root.string, name) == 0);
  89         }
  90       else
  91         {
  92           h = bfd_link_hash_lookup (info->hash, name, TRUE, copy, FALSE);
  93           if (h == NULL)
  94             {
  95               if (hashp != NULL)
  96                 *hashp = NULL;
  97               return FALSE;
  98             }
  99         }
 100
 101       if (info->notice_hash != (struct bfd_hash_table *) NULL
 102           && (bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE)
 103               != (struct bfd_hash_entry *) NULL))
 104         {
 105           if (! (*info->callbacks->notice) (info, h, abfd, section, value,
 106                                             flags, string))
 107             return FALSE;
 108         }
 109
 110       if (hashp != (struct bfd_link_hash_entry **) NULL)
 111         *hashp = h;
 112       /* end duplication from linker.c */
 113
 114       if (h->type == bfd_link_hash_defined
 115           || h->type == bfd_link_hash_indirect)
 116         {
 117           asection *msec;
 118
 119           if (h->type == bfd_link_hash_defined)
 120             msec = h->u.def.section;
 121           else
 122             msec = bfd_ind_section_ptr;
 123
 124           if (bfd_is_abs_section (msec) && !bfd_is_abs_section (section))
 125             {
 126               h->u.def.section = section;
 127               h->u.def.value = value;
 128               return TRUE;
 129             }
 130           else if (bfd_is_abs_section (section) && !bfd_is_abs_section (msec))
 131             return TRUE;
 132         }
 133     }
 134
 135   /* If we didn't exit early, finish processing in the generic routine */
 136   return _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 137                                            value, string, copy, collect,
 138                                            hashp);
 139 }