| 1 | /* PowerPC-specific support for 64-bit ELF. |
| 2 | Copyright (C) 2003-2016 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 | enum ppc_elf_plt_type |
| 22 | { |
| 23 | PLT_UNSET, |
| 24 | PLT_OLD, |
| 25 | PLT_NEW, |
| 26 | PLT_VXWORKS |
| 27 | }; |
| 28 | |
| 29 | /* Various options passed from the linker to bfd backend. */ |
| 30 | struct ppc_elf_params |
| 31 | { |
| 32 | /* Chooses the type of .plt. */ |
| 33 | enum ppc_elf_plt_type plt_style; |
| 34 | |
| 35 | /* Whether to emit symbols for stubs. */ |
| 36 | int emit_stub_syms; |
| 37 | |
| 38 | /* Whether to emit special stub for __tls_get_addr calls. */ |
| 39 | int no_tls_get_addr_opt; |
| 40 | |
| 41 | /* Insert trampolines for branches that won't reach their destination. */ |
| 42 | int branch_trampolines; |
| 43 | |
| 44 | /* Avoid execution falling into new page. */ |
| 45 | int ppc476_workaround; |
| 46 | unsigned int pagesize_p2; |
| 47 | |
| 48 | /* The bfd backend detected a non-PIC reference to a protected symbol |
| 49 | defined in a shared library. */ |
| 50 | int pic_fixup; |
| 51 | |
| 52 | bfd_vma pagesize; |
| 53 | }; |
| 54 | |
| 55 | void ppc_elf_link_params (struct bfd_link_info *, struct ppc_elf_params *); |
| 56 | int ppc_elf_select_plt_layout (bfd *, struct bfd_link_info *); |
| 57 | asection *ppc_elf_tls_setup (bfd *, struct bfd_link_info *); |
| 58 | bfd_boolean ppc_elf_tls_optimize (bfd *, struct bfd_link_info *); |
| 59 | void ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *); |
| 60 | extern bfd_boolean ppc_elf_modify_segment_map (bfd *, |
| 61 | struct bfd_link_info * ATTRIBUTE_UNUSED); |
| 62 | extern bfd_boolean ppc_elf_section_processing (bfd *, Elf_Internal_Shdr *); |