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/* x86-specific ELF linker support between ld and bfd.
Copyright (C) 2019-2020 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
/* Missing IBT, SHSTK and LAM property report control. */
enum elf_x86_prop_report
{
prop_report_none = 0, /* Do nothing. */
prop_report_warning = 1 << 0, /* Issue a warning. */
prop_report_error = 1 << 1, /* Issue an error. */
prop_report_ibt = 1 << 2, /* Report missing IBT property. */
prop_report_shstk = 1 << 3 /* Report missing SHSTK property. */
};
/* Used to pass x86-specific linker options from ld to bfd. */
struct elf_linker_x86_params
{
/* TRUE if BND prefix in PLT entries is always generated. */
unsigned int bndplt: 1;
/* TRUE if IBT-enabled PLT entries should be generated. */
unsigned int ibtplt: 1;
/* TRUE if GNU_PROPERTY_X86_FEATURE_1_IBT should be generated. */
unsigned int ibt: 1;
/* TRUE if GNU_PROPERTY_X86_FEATURE_1_SHSTK should be generated. */
unsigned int shstk: 1;
/* TRUE if GNU_PROPERTY_X86_FEATURE_1_LAM_U48 should be generated. */
unsigned int lam_u48: 1;
/* TRUE if GNU_PROPERTY_X86_FEATURE_1_LAM_U57 should be generated. */
unsigned int lam_u57: 1;
/* TRUE if we shouldn't check relocation overflow. */
unsigned int no_reloc_overflow_check: 1;
/* TRUE if generate a 1-byte NOP as suffix for x86 call instruction. */
unsigned int call_nop_as_suffix : 1;
/* TRUE if -static is passed at command-line before all input files. */
unsigned int static_before_all_inputs : 1;
/* TRUE if --dynamic-linker is passed at command-line. */
unsigned int has_dynamic_linker : 1;
/* X86-64 ISA level needed. */
unsigned int isa_level;
/* Report missing IBT and SHSTK properties. */
enum elf_x86_prop_report cet_report;
/* Report missing LAM_U48 property. */
enum elf_x86_prop_report lam_u48_report;
/* Report missing LAM_U57 property. */
enum elf_x86_prop_report lam_u57_report;
/* The 1-byte NOP for x86 call instruction. */
char call_nop_byte;
};
extern void _bfd_elf_linker_x86_set_options
(struct bfd_link_info *, struct elf_linker_x86_params *);
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