bfd/coff-aux.c

   1 /* BFD back-end for Apple M68K COFF A/UX 3.x files.
   2    Copyright (C) 1996-2017 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      m68k_coff_aux_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, *inh, *t;
  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         h = *hashp;
  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 (hashp != (struct bfd_link_hash_entry **) NULL)
  99         *hashp = h;
 100       /* end duplication from linker.c */
 101
 102       t = h;
 103       inh = NULL;
 104       if (h->type == bfd_link_hash_indirect)
 105         {
 106           inh = h->u.i.link;
 107           t = inh;
 108         }
 109
 110       if (t->type == bfd_link_hash_defined)
 111         {
 112           asection *msec = t->u.def.section;
 113           bfd_boolean special = FALSE;
 114
 115           if (bfd_is_abs_section (msec) && !bfd_is_abs_section (section))
 116             {
 117               t->u.def.section = section;
 118               t->u.def.value = value;
 119               special = TRUE;
 120             }
 121           else if (bfd_is_abs_section (section) && !bfd_is_abs_section (msec))
 122             special = TRUE;
 123
 124           if (special)
 125             {
 126               if (info->notice_all
 127                   || (info->notice_hash != NULL
 128                       && bfd_hash_lookup (info->notice_hash, name,
 129                                           FALSE, FALSE) != NULL))
 130                 {
 131                   if (!(*info->callbacks->notice) (info, h, inh,
 132                                                    abfd, section, value, flags))
 133                     return FALSE;
 134                 }
 135
 136               return TRUE;
 137             }
 138         }
 139     }
 140
 141   /* If we didn't exit early, finish processing in the generic routine */
 142   return _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
 143                                            value, string, copy, collect,
 144                                            hashp);
 145 }