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
5This file is part of BFD, the Binary File Descriptor library.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program; if not, write to the Free Software
19Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 "sysdep.h"
41#include "bfd.h"
42
43static bfd_boolean coff_m68k_aux_link_add_one_symbol
44  PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword,
45           asection *, bfd_vma, const char *, bfd_boolean, bfd_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
59static bfd_boolean
60coff_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     bfd_boolean copy;
70     bfd_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}
136