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
45static bfd_boolean
46coff_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
64static bfd_boolean
65coff_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}
146