1 /* PowerPC64-specific support for 64-bit ELF. 2 Copyright (C) 2002-2016 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. */ 22 struct 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 65 bfd_boolean ppc64_elf_init_stub_bfd 66 (struct bfd_link_info *, struct ppc64_elf_params *); 67 bfd_boolean ppc64_elf_edit_opd 68 (struct bfd_link_info *); 69 asection *ppc64_elf_tls_setup 70 (struct bfd_link_info *); 71 bfd_boolean ppc64_elf_tls_optimize 72 (struct bfd_link_info *); 73 bfd_boolean ppc64_elf_edit_toc 74 (struct bfd_link_info *); 75 bfd_boolean ppc64_elf_has_small_toc_reloc 76 (asection *); 77 bfd_vma ppc64_elf_set_toc 78 (struct bfd_link_info *, bfd *); 79 int ppc64_elf_setup_section_lists 80 (struct bfd_link_info *); 81 void ppc64_elf_start_multitoc_partition 82 (struct bfd_link_info *); 83 bfd_boolean ppc64_elf_next_toc_section 84 (struct bfd_link_info *, asection *); 85 bfd_boolean ppc64_elf_layout_multitoc 86 (struct bfd_link_info *); 87 void ppc64_elf_finish_multitoc_partition 88 (struct bfd_link_info *); 89 bfd_boolean ppc64_elf_check_init_fini 90 (struct bfd_link_info *); 91 bfd_boolean ppc64_elf_next_input_section 92 (struct bfd_link_info *, asection *); 93 bfd_boolean ppc64_elf_size_stubs 94 (struct bfd_link_info *); 95 bfd_boolean ppc64_elf_build_stubs 96 (struct bfd_link_info *, char **); 97 void ppc64_elf_restore_symbols 98 (struct bfd_link_info *info); 99