1 /* x86-specific ELF linker support between ld and bfd.
2 Copyright (C) 2019 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
21 /* Missing IBT and SHSTK property report control. */
22 enum elf_x86_cet_report
24 cet_report_none = 0, /* Do nothing. */
25 cet_report_warning = 1 << 0, /* Issue a warning. */
26 cet_report_error = 1 << 1, /* Issue an error. */
27 cet_report_ibt = 1 << 2, /* Report missing IBT property. */
28 cet_report_shstk = 1 << 3 /* Report missing SHSTK property. */
31 /* Used to pass x86-specific linker options from ld to bfd. */
32 struct elf_linker_x86_params
34 /* TRUE if BND prefix in PLT entries is always generated. */
35 unsigned int bndplt: 1;
37 /* TRUE if IBT-enabled PLT entries should be generated. */
38 unsigned int ibtplt: 1;
40 /* TRUE if GNU_PROPERTY_X86_FEATURE_1_IBT should be generated. */
43 /* TRUE if GNU_PROPERTY_X86_FEATURE_1_SHSTK should be generated. */
44 unsigned int shstk: 1;
46 /* TRUE if we shouldn't check relocation overflow. */
47 unsigned int no_reloc_overflow_check: 1;
49 /* TRUE if generate a 1-byte NOP as suffix for x86 call instruction. */
50 unsigned int call_nop_as_suffix : 1;
52 /* Report missing IBT and SHSTK properties. */
53 enum elf_x86_cet_report cet_report;
55 /* The 1-byte NOP for x86 call instruction. */
59 extern void _bfd_elf_linker_x86_set_options
60 (struct bfd_link_info *, struct elf_linker_x86_params *);