1# This shell script emits a C file. -*- C -*-
2# It does some substitutions.
3if [ -z "$MACHINE" ]; then
4  OUTPUT_ARCH=${ARCH}
5else
6  OUTPUT_ARCH=${ARCH}:${MACHINE}
7fi
8fragment <<EOF
9/* This file is generated by a shell script.  DO NOT EDIT! */
10
11/* Solaris 2 emulation code for ${EMULATION_NAME}
12   Copyright (C) 2010-2016 Free Software Foundation, Inc.
13   Written by Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
14
15   This file is part of the GNU Binutils.
16
17   This program is free software; you can redistribute it and/or modify
18   it under the terms of the GNU General Public License as published by
19   the Free Software Foundation; either version 3 of the License, or
20   (at your option) any later version.
21
22   This program is distributed in the hope that it will be useful,
23   but WITHOUT ANY WARRANTY; without even the implied warranty of
24   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25   GNU General Public License for more details.
26
27   You should have received a copy of the GNU General Public License
28   along with this program; if not, write to the Free Software
29   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
30   MA 02110-1301, USA.  */
31
32#define TARGET_IS_${EMULATION_NAME}
33
34/* The Solaris 2 ABI requires some global symbols to be present in the
35   .dynsym table of executables and shared objects.  If generating a
36   versioned shared object, they must always be bound to the base version.
37
38   Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
39   File, p.63.  */
40static void
41elf_solaris2_before_allocation (void)
42{
43  /* Global symbols required by the Solaris 2 ABI.  */
44  static const char *global_syms[] = {
45    "_DYNAMIC",
46    "_GLOBAL_OFFSET_TABLE_",
47    "_PROCEDURE_LINKAGE_TABLE_",
48    "_edata",
49    "_end",
50    "_etext",
51    NULL
52  };
53  const char **sym;
54
55  /* Do this for both executables and shared objects.  */
56  if (!bfd_link_relocatable (&link_info))
57    {
58      for (sym = global_syms; *sym != NULL; sym++)
59	{
60	  struct elf_link_hash_entry *h;
61
62	  /* Lookup symbol.  */
63	  h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym,
64				    FALSE, FALSE, FALSE);
65	  if (h == NULL)
66	    continue;
67
68	  /* Undo the hiding done by _bfd_elf_define_linkage_sym.  */
69	  h->forced_local = 0;
70	  h->other &= ~STV_HIDDEN;
71
72	  /* Emit it into the .dynamic section, too.  */
73	  bfd_elf_link_record_dynamic_symbol (&link_info, h);
74	}
75    }
76
77  /* Only do this if emitting a shared object and versioning is in place. */
78  if (bfd_link_dll (&link_info)
79      && (link_info.version_info != NULL
80	  || link_info.create_default_symver))
81    {
82      struct bfd_elf_version_expr *globals = NULL, *locals = NULL;
83      struct bfd_elf_version_tree *basever;
84      const char *soname;
85
86      for (sym = global_syms; *sym != NULL; sym++)
87	{
88	  /* Create a version pattern for this symbol.  Some of them start
89	     off as local, others as global, so try both.  */
90	  globals = lang_new_vers_pattern (globals, *sym, NULL, TRUE);
91	  locals = lang_new_vers_pattern (locals, *sym, NULL, TRUE);
92	}
93
94      /* New version node for those symbols.  */
95      basever = lang_new_vers_node (globals, locals);
96
97      /* The version name matches what bfd_elf_size_dynamic_sections uses
98	 for the base version.  */
99      soname = bfd_elf_get_dt_soname (link_info.output_bfd);
100      if (soname == NULL)
101	soname = lbasename (bfd_get_filename (link_info.output_bfd));
102
103      /* Register the node.  */
104      lang_register_vers_node (soname, basever, NULL);
105      /* Enforce base version.  The encoded vd_ndx is vernum + 1.  */
106      basever->vernum = 0;
107    }
108
109  gld${EMULATION_NAME}_before_allocation ();
110}
111
112/* The Solaris 2 ABI requires two local symbols to be emitted for every
113   executable and shared object.
114
115   Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
116   File, p.63.  */
117static void
118elf_solaris2_after_allocation (void)
119{
120  /* Local symbols required by the Solaris 2 ABI.  Already emitted by
121     emulparams/solaris2.sh.  */
122  static const char *local_syms[] = {
123    "_START_",
124    "_END_",
125    NULL
126  };
127  const char **sym;
128
129  /* Do this for both executables and shared objects.  */
130  if (!bfd_link_relocatable (&link_info))
131    {
132      for (sym = local_syms; *sym != NULL; sym++)
133	{
134	  struct elf_link_hash_entry *h;
135
136	  /* Lookup symbol.  */
137	  h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym,
138				    FALSE, FALSE, FALSE);
139	  if (h == NULL)
140	    continue;
141
142	  /* Turn it local.  */
143	  h->forced_local = 1;
144	  /* Type should be STT_OBJECT, not STT_NOTYPE.  */
145	  h->type = STT_OBJECT;
146	}
147    }
148
149  gld${EMULATION_NAME}_after_allocation ();
150}
151
152EOF
153
154LDEMUL_BEFORE_ALLOCATION=elf_solaris2_before_allocation
155LDEMUL_AFTER_ALLOCATION=elf_solaris2_after_allocation
156