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.  */
22enum 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.  */
32struct elf_linker_x86_params
33{
34  /* TRUE if IBT-enabled PLT entries should be generated.  */
35  unsigned int ibtplt: 1;
36
37  /* TRUE if GNU_PROPERTY_X86_FEATURE_1_IBT should be generated.  */
38  unsigned int ibt: 1;
39
40  /* TRUE if GNU_PROPERTY_X86_FEATURE_1_SHSTK should be generated.  */
41  unsigned int shstk: 1;
42
43  /* TRUE if GNU_PROPERTY_X86_FEATURE_1_LAM_U48 should be generated.  */
44  unsigned int lam_u48: 1;
45
46  /* TRUE if GNU_PROPERTY_X86_FEATURE_1_LAM_U57 should be generated.  */
47  unsigned int lam_u57: 1;
48
49  /* TRUE if we shouldn't check relocation overflow.  */
50  unsigned int no_reloc_overflow_check: 1;
51
52  /* TRUE if generate a 1-byte NOP as suffix for x86 call instruction.  */
53  unsigned int call_nop_as_suffix : 1;
54
55  /* TRUE if -static is passed at command-line before all input files.  */
56  unsigned int static_before_all_inputs : 1;
57
58  /* TRUE if --dynamic-linker is passed at command-line.  */
59  unsigned int has_dynamic_linker : 1;
60
61  /* Report relative relocations.  */
62  unsigned int report_relative_reloc : 1;
63
64  /* X86-64 ISA level needed.  */
65  unsigned int isa_level;
66
67  /* Report missing IBT and SHSTK properties.  */
68  enum elf_x86_prop_report cet_report;
69
70  /* Report missing LAM_U48 property.  */
71  enum elf_x86_prop_report lam_u48_report;
72
73  /* Report missing LAM_U57 property.  */
74  enum elf_x86_prop_report lam_u57_report;
75
76  /* The 1-byte NOP for x86 call instruction.  */
77  char call_nop_byte;
78};
79
80extern void _bfd_elf_linker_x86_set_options
81  (struct bfd_link_info *, struct elf_linker_x86_params *);
82