1/* PowerPC64-specific support for 64-bit ELF.
2   Copyright (C) 2002-2017 Free Software Foundation, Inc.
3
4   This file is part of BFD, the Binary File Descriptor library.
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 3 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software
18   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19   MA 02110-1301, USA.  */
20
21/* Used to pass info between ld and bfd.  */
22struct ppc64_elf_params
23{
24  /* Linker stub bfd.  */
25  bfd *stub_bfd;
26
27  /* Linker call-backs.  */
28  asection * (*add_stub_section) (const char *, asection *);
29  void (*layout_sections_again) (void);
30
31  /* Maximum size of a group of input sections that can be handled by
32     one stub section.  A value of +/-1 indicates the bfd back-end
33     should use a suitable default size.  */
34  bfd_signed_vma group_size;
35
36  /* Whether to use a special call stub for __tls_get_addr.  */
37  int tls_get_addr_opt;
38
39  /* Whether to allow multiple toc sections.  */
40  int no_multi_toc;
41
42  /* Set if PLT call stubs should load r11.  */
43  int plt_static_chain;
44
45  /* Set if PLT call stubs need to be thread safe on power7+.  */
46  int plt_thread_safe;
47
48  /* Set if individual PLT call stubs should be aligned.  */
49  int plt_stub_align;
50
51  /* Whether to canonicalize .opd so that there are no overlapping
52     .opd entries.  */
53  int non_overlapping_opd;
54
55  /* Whether to emit symbols for stubs.  */
56  int emit_stub_syms;
57
58  /* Whether to generate out-of-line register save/restore for gcc -Os code.  */
59  int save_restore_funcs;
60
61  /* Set when a potential variable is detected in .toc.  */
62  int object_in_toc;
63};
64
65bfd_boolean ppc64_elf_init_stub_bfd
66  (struct bfd_link_info *, struct ppc64_elf_params *);
67bfd_boolean ppc64_elf_edit_opd
68  (struct bfd_link_info *);
69asection *ppc64_elf_tls_setup
70  (struct bfd_link_info *);
71bfd_boolean ppc64_elf_tls_optimize
72  (struct bfd_link_info *);
73bfd_boolean ppc64_elf_edit_toc
74  (struct bfd_link_info *);
75bfd_boolean ppc64_elf_has_small_toc_reloc
76  (asection *);
77bfd_vma ppc64_elf_set_toc
78  (struct bfd_link_info *, bfd *);
79int ppc64_elf_setup_section_lists
80  (struct bfd_link_info *);
81void ppc64_elf_start_multitoc_partition
82  (struct bfd_link_info *);
83bfd_boolean ppc64_elf_next_toc_section
84  (struct bfd_link_info *, asection *);
85bfd_boolean ppc64_elf_layout_multitoc
86  (struct bfd_link_info *);
87void ppc64_elf_finish_multitoc_partition
88  (struct bfd_link_info *);
89bfd_boolean ppc64_elf_check_init_fini
90  (struct bfd_link_info *);
91bfd_boolean ppc64_elf_next_input_section
92  (struct bfd_link_info *, asection *);
93bfd_boolean ppc64_elf_size_stubs
94(struct bfd_link_info *);
95bfd_boolean ppc64_elf_build_stubs
96  (struct bfd_link_info *, char **);
97