1 /* x86-specific ELF linker support between ld and bfd. 2 Copyright (C) 2019-2020 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 /* Missing IBT and SHSTK property report control. */ 22 enum elf_x86_cet_report 23 { 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. */ 29 }; 30 31 /* Used to pass x86-specific linker options from ld to bfd. */ 32 struct elf_linker_x86_params 33 { 34 /* TRUE if BND prefix in PLT entries is always generated. */ 35 unsigned int bndplt: 1; 36 37 /* TRUE if IBT-enabled PLT entries should be generated. */ 38 unsigned int ibtplt: 1; 39 40 /* TRUE if GNU_PROPERTY_X86_FEATURE_1_IBT should be generated. */ 41 unsigned int ibt: 1; 42 43 /* TRUE if GNU_PROPERTY_X86_FEATURE_1_SHSTK should be generated. */ 44 unsigned int shstk: 1; 45 46 /* TRUE if we shouldn't check relocation overflow. */ 47 unsigned int no_reloc_overflow_check: 1; 48 49 /* TRUE if generate a 1-byte NOP as suffix for x86 call instruction. */ 50 unsigned int call_nop_as_suffix : 1; 51 52 /* Report missing IBT and SHSTK properties. */ 53 enum elf_x86_cet_report cet_report; 54 55 /* The 1-byte NOP for x86 call instruction. */ 56 char call_nop_byte; 57 }; 58 59 extern void _bfd_elf_linker_x86_set_options 60 (struct bfd_link_info *, struct elf_linker_x86_params *); 61