1/* PowerPC64-specific support for 64-bit ELF.
2   Copyright (C) 2002-2022 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  void (*edit) (void);
31
32  /* Maximum size of a group of input sections that can be handled by
33     one stub section.  A value of +/-1 indicates the bfd back-end
34     should use a suitable default size.  */
35  bfd_signed_vma group_size;
36
37  /* Whether to use a special call stub for __tls_get_addr.  */
38  int tls_get_addr_opt;
39
40  /* Whether the special call stub should save r4..r12.  */
41  int no_tls_get_addr_regsave;
42
43  /* Whether to allow multiple toc sections.  */
44  int no_multi_toc;
45
46  /* Set if PLT call stubs should load r11.  */
47  int plt_static_chain;
48
49  /* Set if PLT call stubs need to be thread safe on power7+.  */
50  int plt_thread_safe;
51
52  /* Set if individual PLT call stubs should be aligned.  */
53  int plt_stub_align;
54
55  /* Set if PLT call stubs for localentry:0 functions should omit r2 save.  */
56  int plt_localentry0;
57
58  /* Whether to use power10 instructions in linkage stubs.  */
59  int power10_stubs;
60
61  /* Whether R_PPC64_PCREL_OPT should be ignored.  */
62  int no_pcrel_opt;
63
64  /* Whether to canonicalize .opd so that there are no overlapping
65     .opd entries.  */
66  int non_overlapping_opd;
67
68  /* Whether to emit symbols for stubs.  */
69  int emit_stub_syms;
70
71  /* Whether to generate out-of-line register save/restore for gcc -Os code.  */
72  int save_restore_funcs;
73
74  /* Set when a potential variable is detected in .toc.  */
75  int object_in_toc;
76};
77
78bool ppc64_elf_init_stub_bfd
79  (struct bfd_link_info *, struct ppc64_elf_params *);
80bool ppc64_elf_edit_opd
81  (struct bfd_link_info *);
82bool ppc64_elf_inline_plt
83  (struct bfd_link_info *);
84bool ppc64_elf_tls_setup
85  (struct bfd_link_info *);
86bool ppc64_elf_tls_optimize
87  (struct bfd_link_info *);
88bool ppc64_elf_edit_toc
89  (struct bfd_link_info *);
90bool ppc64_elf_has_small_toc_reloc
91  (asection *);
92bfd_vma ppc64_elf_set_toc
93  (struct bfd_link_info *, bfd *);
94int ppc64_elf_setup_section_lists
95  (struct bfd_link_info *);
96void ppc64_elf_start_multitoc_partition
97  (struct bfd_link_info *);
98bool ppc64_elf_next_toc_section
99  (struct bfd_link_info *, asection *);
100bool ppc64_elf_layout_multitoc
101  (struct bfd_link_info *);
102void ppc64_elf_finish_multitoc_partition
103  (struct bfd_link_info *);
104bool ppc64_elf_check_init_fini
105  (struct bfd_link_info *);
106bool ppc64_elf_next_input_section
107  (struct bfd_link_info *, asection *);
108bool ppc64_elf_size_stubs
109(struct bfd_link_info *);
110bool ppc64_elf_build_stubs
111  (struct bfd_link_info *, char **);
112