1 /* BFD back-end for Apple M68K COFF A/UX 3.x files.
2 Copyright (C) 1996-2016 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
coff_m68k_aux_link_add_one_symbol(struct bfd_link_info * info,bfd * abfd,const char * name,flagword flags,asection * section,bfd_vma value,const char * string,bfd_boolean copy,bfd_boolean collect,struct bfd_link_hash_entry ** hashp)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 }
146