1 /* x86-specific ELF linker support between ld and bfd. 2 Copyright (C) 2019-2022 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 /* Missing IBT, SHSTK and LAM property report control. */ 22 enum elf_x86_prop_report 23 { 24 prop_report_none = 0, /* Do nothing. */ 25 prop_report_warning = 1 << 0, /* Issue a warning. */ 26 prop_report_error = 1 << 1, /* Issue an error. */ 27 prop_report_ibt = 1 << 2, /* Report missing IBT property. */ 28 prop_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 GNU_PROPERTY_X86_FEATURE_1_LAM_U48 should be generated. */ 47 unsigned int lam_u48: 1; 48 49 /* TRUE if GNU_PROPERTY_X86_FEATURE_1_LAM_U57 should be generated. */ 50 unsigned int lam_u57: 1; 51 52 /* TRUE if we shouldn't check relocation overflow. */ 53 unsigned int no_reloc_overflow_check: 1; 54 55 /* TRUE if generate a 1-byte NOP as suffix for x86 call instruction. */ 56 unsigned int call_nop_as_suffix : 1; 57 58 /* TRUE if -static is passed at command-line before all input files. */ 59 unsigned int static_before_all_inputs : 1; 60 61 /* TRUE if --dynamic-linker is passed at command-line. */ 62 unsigned int has_dynamic_linker : 1; 63 64 /* Report relative relocations. */ 65 unsigned int report_relative_reloc : 1; 66 67 /* X86-64 ISA level needed. */ 68 unsigned int isa_level; 69 70 /* Report missing IBT and SHSTK properties. */ 71 enum elf_x86_prop_report cet_report; 72 73 /* Report missing LAM_U48 property. */ 74 enum elf_x86_prop_report lam_u48_report; 75 76 /* Report missing LAM_U57 property. */ 77 enum elf_x86_prop_report lam_u57_report; 78 79 /* The 1-byte NOP for x86 call instruction. */ 80 char call_nop_byte; 81 }; 82 83 extern void _bfd_elf_linker_x86_set_options 84 (struct bfd_link_info *, struct elf_linker_x86_params *); 85