[thirdparty/binutils-gdb.git] / ld / emultempl / aarch64elf.em

# This shell script emits a C file. -*- C -*-
#   Copyright (C) 2009-2019 Free Software Foundation, Inc.
#   Contributed by ARM Ltd.
#
# This file is part of the GNU Binutils.
#
# 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; see the file COPYING3. If not,
# see <http://www.gnu.org/licenses/>.
#

# This file is sourced from elf32.em, and defines extra aarch64-elf
# specific routines.
#
fragment <<EOF

#include "ldctor.h"
#include "elf/aarch64.h"

static int no_enum_size_warning = 0;
static int no_wchar_size_warning = 0;
static int pic_veneer = 0;
static int fix_erratum_835769 = 0;
static int fix_erratum_843419 = 0;
static int no_apply_dynamic_relocs = 0;

static void
gld${EMULATION_NAME}_before_parse (void)
{
#ifndef TARGET_			/* I.e., if not generic.  */
  ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
#endif /* not TARGET_ */
  input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
  config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
  config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
  link_info.check_relocs_after_open_input = TRUE;
  link_info.relro = DEFAULT_LD_Z_RELRO;
}

static void
aarch64_elf_before_allocation (void)
{
  /* We should be able to set the size of the interworking stub section.  We
     can't do it until later if we have dynamic sections, though.  */
  if (! elf_hash_table (&link_info)->dynamic_sections_created)
    {
      /* Here we rummage through the found bfds to collect information.  */
      LANG_FOR_EACH_INPUT_STATEMENT (is)
      {
	/* Initialise mapping tables for code/data.  */
	bfd_elf${ELFSIZE}_aarch64_init_maps (is->the_bfd);
      }
    }

  /* Call the standard elf routine.  */
  gld${EMULATION_NAME}_before_allocation ();
}

/* Fake input file for stubs.  */
static lang_input_statement_type *stub_file;

/* Whether we need to call gldarm_layout_sections_again.  */
static int need_laying_out = 0;

/* Maximum size of a group of input sections that can be handled by
   one stub section.  A value of +/-1 indicates the bfd back-end
   should use a suitable default size.  */
static bfd_signed_vma group_size = 1;

struct hook_stub_info
{
  lang_statement_list_type add;
  asection *input_section;
};

/* Traverse the linker tree to find the spot where the stub goes.  */

static bfd_boolean
hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
{
  lang_statement_union_type *l;
  bfd_boolean ret;

  for (; (l = *lp) != NULL; lp = &l->header.next)
    {
      switch (l->header.type)
	{
	case lang_constructors_statement_enum:
	  ret = hook_in_stub (info, &constructor_list.head);
	  if (ret)
	    return ret;
	  break;

	case lang_output_section_statement_enum:
	  ret = hook_in_stub (info,
			      &l->output_section_statement.children.head);
	  if (ret)
	    return ret;
	  break;

	case lang_wild_statement_enum:
	  ret = hook_in_stub (info, &l->wild_statement.children.head);
	  if (ret)
	    return ret;
	  break;

	case lang_group_statement_enum:
	  ret = hook_in_stub (info, &l->group_statement.children.head);
	  if (ret)
	    return ret;
	  break;

	case lang_input_section_enum:
	  if (l->input_section.section == info->input_section)
	    {
	      /* We've found our section.  Insert the stub immediately
		 after its associated input section.  */
	      *(info->add.tail) = l->header.next;
	      l->header.next = info->add.head;
	      return TRUE;
	    }
	  break;

	case lang_data_statement_enum:
	case lang_reloc_statement_enum:
	case lang_object_symbols_statement_enum:
	case lang_output_statement_enum:
	case lang_target_statement_enum:
	case lang_input_statement_enum:
	case lang_assignment_statement_enum:
	case lang_padding_statement_enum:
	case lang_address_statement_enum:
	case lang_fill_statement_enum:
	  break;

	default:
	  FAIL ();
	  break;
	}
    }
  return FALSE;
}


/* Call-back for elf${ELFSIZE}_aarch64_size_stubs.  */

/* Create a new stub section, and arrange for it to be linked
   immediately after INPUT_SECTION.  */

static asection *
elf${ELFSIZE}_aarch64_add_stub_section (const char *stub_sec_name,
					asection *input_section)
{
  asection *stub_sec;
  flagword flags;
  asection *output_section;
  lang_output_section_statement_type *os;
  struct hook_stub_info info;

  flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
	   | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
  stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
						 stub_sec_name, flags);
  if (stub_sec == NULL)
    goto err_ret;

  /* Long branch stubs contain a 64-bit address, so the section requires
     8 byte alignment.  */
  bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 3);

  output_section = input_section->output_section;
  os = lang_output_section_get (output_section);

  info.input_section = input_section;
  lang_list_init (&info.add);
  lang_add_section (&info.add, stub_sec, NULL, os);

  if (info.add.head == NULL)
    goto err_ret;

  if (hook_in_stub (&info, &os->children.head))
    return stub_sec;

 err_ret:
  einfo (_("%X%P: can not make stub section: %E\n"));
  return NULL;
}

/* Another call-back for elf${ELFSIZE}_aarch64_size_stubs.  */

static void
gldaarch64_layout_sections_again (void)
{
  /* If we have changed sizes of the stub sections, then we need
     to recalculate all the section offsets.  This may mean we need to
     add even more stubs.  */
  gld${EMULATION_NAME}_map_segments (TRUE);
  need_laying_out = -1;
}

static void
build_section_lists (lang_statement_union_type *statement)
{
  if (statement->header.type == lang_input_section_enum)
    {
      asection *i = statement->input_section.section;

      if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms
	  && (i->flags & SEC_EXCLUDE) == 0
	  && i->output_section != NULL
	  && i->output_section->owner == link_info.output_bfd)
	elf${ELFSIZE}_aarch64_next_input_section (& link_info, i);
    }
}

static void
gld${EMULATION_NAME}_after_allocation (void)
{
  int ret;

  /* bfd_elf32_discard_info just plays with debugging sections,
     ie. doesn't affect any code, so we can delay resizing the
     sections.  It's likely we'll resize everything in the process of
     adding stubs.  */
  ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
  if (ret < 0)
    {
      einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
      return;
    }
  else if (ret > 0)
    need_laying_out = 1;

  /* If generating a relocatable output file, then we don't
     have to examine the relocs.  */
  if (stub_file != NULL && !bfd_link_relocatable (&link_info))
    {
      ret = elf${ELFSIZE}_aarch64_setup_section_lists (link_info.output_bfd,
						       &link_info);
      if (ret != 0)
	{
	  if (ret < 0)
	    {
	      einfo (_("%X%P: could not compute sections lists "
		       "for stub generation: %E\n"));
	      return;
	    }

	  lang_for_each_statement (build_section_lists);

	  /* Call into the BFD backend to do the real work.  */
	  if (! elf${ELFSIZE}_aarch64_size_stubs (link_info.output_bfd,
					  stub_file->the_bfd,
					  & link_info,
					  group_size,
					  & elf${ELFSIZE}_aarch64_add_stub_section,
					  & gldaarch64_layout_sections_again))
	    {
	      einfo (_("%X%P: can not size stub section: %E\n"));
	      return;
	    }
	}
    }

  if (need_laying_out != -1)
    gld${EMULATION_NAME}_map_segments (need_laying_out);
}

static void
gld${EMULATION_NAME}_finish (void)
{
  if (!bfd_link_relocatable (&link_info))
    {
      /* Now build the linker stubs.  */
      if (stub_file->the_bfd->sections != NULL)
	{
	  if (! elf${ELFSIZE}_aarch64_build_stubs (& link_info))
	    einfo (_("%X%P: can not build stubs: %E\n"));
	}
    }

  finish_default ();
}

/* This is a convenient point to tell BFD about target specific flags.
   After the output has been created, but before inputs are read.  */
static void
aarch64_elf_create_output_section_statements (void)
{
  if (strstr (bfd_get_target (link_info.output_bfd), "aarch64") == NULL)
    {
      /* The arm backend needs special fields in the output hash structure.
	 These will only be created if the output format is an arm format,
	 hence we do not support linking and changing output formats at the
	 same time.  Use a link followed by objcopy to change output formats.  */
      einfo (_("%F%P: error: cannot change output format "
	       "whilst linking %s binaries\n"), "AArch64");
      return;
    }

  bfd_elf${ELFSIZE}_aarch64_set_options (link_info.output_bfd, &link_info,
				 no_enum_size_warning,
				 no_wchar_size_warning,
				 pic_veneer,
				 fix_erratum_835769, fix_erratum_843419,
				 no_apply_dynamic_relocs);

  stub_file = lang_add_input_file ("linker stubs",
				   lang_input_file_is_fake_enum,
				   NULL);
  stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
  if (stub_file->the_bfd == NULL
      || ! bfd_set_arch_mach (stub_file->the_bfd,
			      bfd_get_arch (link_info.output_bfd),
			      bfd_get_mach (link_info.output_bfd)))
    {
      einfo (_("%F%P: can not create BFD: %E\n"));
      return;
    }

  stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
  ldlang_add_file (stub_file);
}

/* Avoid processing the fake stub_file in vercheck, stat_needed and
   check_needed routines.  */

static void (*real_func) (lang_input_statement_type *);

static void aarch64_for_each_input_file_wrapper (lang_input_statement_type *l)
{
  if (l != stub_file)
    (*real_func) (l);
}

static void
aarch64_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
{
  real_func = func;
  lang_for_each_input_file (&aarch64_for_each_input_file_wrapper);
}

#define lang_for_each_input_file aarch64_lang_for_each_input_file

EOF

# Define some shell vars to insert bits of code into the standard elf
# parse_args and list_options functions.
#
PARSE_AND_LIST_PROLOGUE='
#define OPTION_NO_ENUM_SIZE_WARNING	309
#define OPTION_PIC_VENEER		310
#define OPTION_STUBGROUP_SIZE		311
#define OPTION_NO_WCHAR_SIZE_WARNING	312
#define OPTION_FIX_ERRATUM_835769	313
#define OPTION_FIX_ERRATUM_843419	314
#define OPTION_NO_APPLY_DYNAMIC_RELOCS	315
'

PARSE_AND_LIST_SHORTOPTS=p

PARSE_AND_LIST_LONGOPTS='
  { "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
  { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
  { "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
  { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
  { "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
  { "fix-cortex-a53-835769", no_argument, NULL, OPTION_FIX_ERRATUM_835769},
  { "fix-cortex-a53-843419", no_argument, NULL, OPTION_FIX_ERRATUM_843419},
  { "no-apply-dynamic-relocs", no_argument, NULL, OPTION_NO_APPLY_DYNAMIC_RELOCS},
'

PARSE_AND_LIST_OPTIONS='
  fprintf (file, _("  --no-enum-size-warning      Don'\''t warn about objects with incompatible\n"
		   "                                enum sizes\n"));
  fprintf (file, _("  --no-wchar-size-warning     Don'\''t warn about objects with incompatible\n"
		   "                                wchar_t sizes\n"));
  fprintf (file, _("  --pic-veneer                Always generate PIC interworking veneers\n"));
  fprintf (file, _("\
  --stub-group-size=N         Maximum size of a group of input sections that\n\
                                can be handled by one stub section.  A negative\n\
                                value locates all stubs after their branches\n\
                                (with a group size of -N), while a positive\n\
                                value allows two groups of input sections, one\n\
                                before, and one after each stub section.\n\
                                Values of +/-1 indicate the linker should\n\
                                choose suitable defaults.\n"));
  fprintf (file, _("  --fix-cortex-a53-835769      Fix erratum 835769\n"));
  fprintf (file, _("  --fix-cortex-a53-843419      Fix erratum 843419\n"));
  fprintf (file, _("  --no-apply-dynamic-relocs    Do not apply link-time values for dynamic relocations\n"));
'

PARSE_AND_LIST_ARGS_CASES='
    case '\'p\'':
      /* Only here for backwards compatibility.  */
      break;

    case OPTION_NO_ENUM_SIZE_WARNING:
      no_enum_size_warning = 1;
      break;

    case OPTION_NO_WCHAR_SIZE_WARNING:
      no_wchar_size_warning = 1;
      break;

    case OPTION_PIC_VENEER:
      pic_veneer = 1;
      break;

    case OPTION_FIX_ERRATUM_835769:
      fix_erratum_835769 = 1;
      break;

    case OPTION_FIX_ERRATUM_843419:
      fix_erratum_843419 = 1;
      break;

    case OPTION_NO_APPLY_DYNAMIC_RELOCS:
      no_apply_dynamic_relocs = 1;
      break;

    case OPTION_STUBGROUP_SIZE:
      {
	const char *end;

	group_size = bfd_scan_vma (optarg, &end, 0);
	if (*end)
	  einfo (_("%F%P: invalid number `%s'\''\n"), optarg);
      }
      break;
'

# We have our own before_allocation etc. functions, but they call
# the standard routines, so give them a different name.
LDEMUL_BEFORE_ALLOCATION=aarch64_elf_before_allocation
LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=aarch64_elf_create_output_section_statements

# Replace the elf before_parse function with our own.
LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse

# Call the extra arm-elf function
LDEMUL_FINISH=gld${EMULATION_NAME}_finish
Commit	Line	Data
a06ea964	1	# This shell script emits a C file. -- C --
82704155	2	# Copyright (C) 2009-2019 Free Software Foundation, Inc.
a06ea964 NC	3	# Contributed by ARM Ltd.
	4	#
	5	# This file is part of the GNU Binutils.
	6	#
	7	# This program is free software; you can redistribute it and/or modify
	8	# it under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 3 of the license, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful,
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	# GNU General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; see the file COPYING3. If not,
	19	# see <http://www.gnu.org/licenses/>.
	20	#
	21
	22	# This file is sourced from elf32.em, and defines extra aarch64-elf
	23	# specific routines.
	24	#
	25	fragment <<EOF
	26
	27	#include "ldctor.h"
	28	#include "elf/aarch64.h"
	29
	30	static int no_enum_size_warning = 0;
	31	static int no_wchar_size_warning = 0;
	32	static int pic_veneer = 0;
68fcca92	33	static int fix_erratum_835769 = 0;
4106101c	34	static int fix_erratum_843419 = 0;
1f56df9d	35	static int no_apply_dynamic_relocs = 0;
a06ea964 NC	36
	37	static void
	38	gld${EMULATION_NAME}_before_parse (void)
	39	{
	40	#ifndef TARGET_ /* I.e., if not generic. */
	41	ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
	42	#endif /* not TARGET_ */
	43	input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
	44	config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
e2caaa1f	45	config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
5c3261b0	46	link_info.check_relocs_after_open_input = TRUE;
576438f0	47	link_info.relro = DEFAULT_LD_Z_RELRO;
a06ea964 NC	48	}
	49
	50	static void
	51	aarch64_elf_before_allocation (void)
	52	{
	53	/* We should be able to set the size of the interworking stub section. We
	54	can't do it until later if we have dynamic sections, though. */
	55	if (! elf_hash_table (&link_info)->dynamic_sections_created)
	56	{
	57	/* Here we rummage through the found bfds to collect information. */
	58	LANG_FOR_EACH_INPUT_STATEMENT (is)
6c19b93b AM	59	{
	60	/* Initialise mapping tables for code/data. */
	61	bfd_elf${ELFSIZE}_aarch64_init_maps (is->the_bfd);
	62	}
a06ea964 NC	63	}
	64
	65	/* Call the standard elf routine. */
	66	gld${EMULATION_NAME}_before_allocation ();
	67	}
	68
	69	/* Fake input file for stubs. */
	70	static lang_input_statement_type *stub_file;
	71
	72	/* Whether we need to call gldarm_layout_sections_again. */
	73	static int need_laying_out = 0;
	74
	75	/* Maximum size of a group of input sections that can be handled by
	76	one stub section. A value of +/-1 indicates the bfd back-end
	77	should use a suitable default size. */
	78	static bfd_signed_vma group_size = 1;
	79
	80	struct hook_stub_info
	81	{
	82	lang_statement_list_type add;
	83	asection *input_section;
	84	};
	85
	86	/* Traverse the linker tree to find the spot where the stub goes. */
	87
	88	static bfd_boolean
	89	hook_in_stub (struct hook_stub_info info, lang_statement_union_type *lp)
	90	{
	91	lang_statement_union_type *l;
	92	bfd_boolean ret;
	93
	94	for (; (l = *lp) != NULL; lp = &l->header.next)
	95	{
	96	switch (l->header.type)
	97	{
	98	case lang_constructors_statement_enum:
	99	ret = hook_in_stub (info, &constructor_list.head);
	100	if (ret)
	101	return ret;
	102	break;
	103
	104	case lang_output_section_statement_enum:
	105	ret = hook_in_stub (info,
	106	&l->output_section_statement.children.head);
	107	if (ret)
	108	return ret;
	109	break;
	110
	111	case lang_wild_statement_enum:
	112	ret = hook_in_stub (info, &l->wild_statement.children.head);
	113	if (ret)
	114	return ret;
	115	break;
	116
	117	case lang_group_statement_enum:
	118	ret = hook_in_stub (info, &l->group_statement.children.head);
	119	if (ret)
	120	return ret;
	121	break;
	122
	123	case lang_input_section_enum:
	124	if (l->input_section.section == info->input_section)
	125	{
	126	/* We've found our section. Insert the stub immediately
127	after its associated input section. */
128	*(info->add.tail) = l->header.next;
129	l->header.next = info->add.head;
130	return TRUE;
131	}
132	break;
133
134	case lang_data_statement_enum:
135	case lang_reloc_statement_enum:
136	case lang_object_symbols_statement_enum:
137	case lang_output_statement_enum:
138	case lang_target_statement_enum:
139	case lang_input_statement_enum:
140	case lang_assignment_statement_enum:
141	case lang_padding_statement_enum:
142	case lang_address_statement_enum:
143	case lang_fill_statement_enum:
144	break;
145
146	default:
147	FAIL ();
148	break;
149	}
150	}
151	return FALSE;
152	}
153
154
4390599b	155	/* Call-back for elf${ELFSIZE}_aarch64_size_stubs. */
a06ea964 NC	156
	157	/* Create a new stub section, and arrange for it to be linked
	158	immediately after INPUT_SECTION. */
	159
	160	static asection *
4390599b	161	elf${ELFSIZE}_aarch64_add_stub_section (const char *stub_sec_name,
499c37b5	162	asection *input_section)
a06ea964 NC	163	{
	164	asection *stub_sec;
	165	flagword flags;
	166	asection *output_section;
a06ea964 NC	167	lang_output_section_statement_type *os;
	168	struct hook_stub_info info;
	169
	170	flags = (SEC_ALLOC \| SEC_LOAD \| SEC_READONLY \| SEC_CODE
	171	\| SEC_HAS_CONTENTS \| SEC_RELOC \| SEC_IN_MEMORY \| SEC_KEEP);
	172	stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
	173	stub_sec_name, flags);
	174	if (stub_sec == NULL)
	175	goto err_ret;
	176
9a2ebffd JW	177	/* Long branch stubs contain a 64-bit address, so the section requires
	178	8 byte alignment. */
	179	bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 3);
a06ea964 NC	180
a06ea964 NC	181	output_section = input_section->output_section;
24ef1aa7	182	os = lang_output_section_get (output_section);
a06ea964 NC	183
	184	info.input_section = input_section;
	185	lang_list_init (&info.add);
	186	lang_add_section (&info.add, stub_sec, NULL, os);
	187
	188	if (info.add.head == NULL)
	189	goto err_ret;
	190
	191	if (hook_in_stub (&info, &os->children.head))
	192	return stub_sec;
	193
	194	err_ret:
d003af55	195	einfo (_("%X%P: can not make stub section: %E\n"));
a06ea964 NC	196	return NULL;
	197	}
	198
4390599b	199	/* Another call-back for elf${ELFSIZE}_aarch64_size_stubs. */
a06ea964 NC	200
	201	static void
	202	gldaarch64_layout_sections_again (void)
	203	{
	204	/* If we have changed sizes of the stub sections, then we need
	205	to recalculate all the section offsets. This may mean we need to
	206	add even more stubs. */
	207	gld${EMULATION_NAME}_map_segments (TRUE);
	208	need_laying_out = -1;
	209	}
	210
	211	static void
	212	build_section_lists (lang_statement_union_type *statement)
	213	{
	214	if (statement->header.type == lang_input_section_enum)
	215	{
	216	asection *i = statement->input_section.section;
	217
	218	if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms
	219	&& (i->flags & SEC_EXCLUDE) == 0
	220	&& i->output_section != NULL
	221	&& i->output_section->owner == link_info.output_bfd)
4390599b	222	elf${ELFSIZE}_aarch64_next_input_section (& link_info, i);
a06ea964 NC	223	}
	224	}
	225
	226	static void
	227	gld${EMULATION_NAME}_after_allocation (void)
	228	{
75938853 AM	229	int ret;
75938853 AM	230
a06ea964 NC	231	/* bfd_elf32_discard_info just plays with debugging sections,
	232	ie. doesn't affect any code, so we can delay resizing the
	233	sections. It's likely we'll resize everything in the process of
	234	adding stubs. */
75938853 AM	235	ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
	236	if (ret < 0)
	237	{
d003af55	238	einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
75938853 AM	239	return;
	240	}
	241	else if (ret > 0)
a06ea964 NC	242	need_laying_out = 1;
	243
	244	/* If generating a relocatable output file, then we don't
	245	have to examine the relocs. */
0e1862bb	246	if (stub_file != NULL && !bfd_link_relocatable (&link_info))
a06ea964	247	{
75938853 AM	248	ret = elf${ELFSIZE}_aarch64_setup_section_lists (link_info.output_bfd,
75938853 AM	249	&link_info);
a06ea964 NC	250	if (ret != 0)
	251	{
	252	if (ret < 0)
	253	{
d003af55 AM	254	einfo (_("%X%P: could not compute sections lists "
d003af55 AM	255	"for stub generation: %E\n"));
a06ea964 NC	256	return;
	257	}
	258
	259	lang_for_each_statement (build_section_lists);
	260
	261	/* Call into the BFD backend to do the real work. */
4390599b	262	if (! elf${ELFSIZE}_aarch64_size_stubs (link_info.output_bfd,
a06ea964 NC	263	stub_file->the_bfd,
	264	& link_info,
	265	group_size,
4390599b	266	& elf${ELFSIZE}_aarch64_add_stub_section,
a06ea964 NC	267	& gldaarch64_layout_sections_again))
a06ea964 NC	268	{
df5f2391	269	einfo (_("%X%P: can not size stub section: %E\n"));
a06ea964 NC	270	return;
	271	}
	272	}
	273	}
	274
	275	if (need_laying_out != -1)
	276	gld${EMULATION_NAME}_map_segments (need_laying_out);
	277	}
	278
	279	static void
	280	gld${EMULATION_NAME}_finish (void)
	281	{
0e1862bb	282	if (!bfd_link_relocatable (&link_info))
a06ea964 NC	283	{
	284	/* Now build the linker stubs. */
	285	if (stub_file->the_bfd->sections != NULL)
	286	{
4390599b	287	if (! elf${ELFSIZE}_aarch64_build_stubs (& link_info))
d003af55	288	einfo (_("%X%P: can not build stubs: %E\n"));
a06ea964 NC	289	}
	290	}
	291
	292	finish_default ();
	293	}
	294
	295	/* This is a convenient point to tell BFD about target specific flags.
	296	After the output has been created, but before inputs are read. */
	297	static void
	298	aarch64_elf_create_output_section_statements (void)
	299	{
	300	if (strstr (bfd_get_target (link_info.output_bfd), "aarch64") == NULL)
	301	{
	302	/* The arm backend needs special fields in the output hash structure.
	303	These will only be created if the output format is an arm format,
	304	hence we do not support linking and changing output formats at the
	305	same time. Use a link followed by objcopy to change output formats. */
df5f2391 AM	306	einfo (_("%F%P: error: cannot change output format "
df5f2391 AM	307	"whilst linking %s binaries\n"), "AArch64");
a06ea964 NC	308	return;
	309	}
	310
4390599b	311	bfd_elf${ELFSIZE}_aarch64_set_options (link_info.output_bfd, &link_info,
a06ea964 NC	312	no_enum_size_warning,
a06ea964 NC	313	no_wchar_size_warning,
4106101c	314	pic_veneer,
1f56df9d JW	315	fix_erratum_835769, fix_erratum_843419,
1f56df9d JW	316	no_apply_dynamic_relocs);
a06ea964 NC	317
	318	stub_file = lang_add_input_file ("linker stubs",
	319	lang_input_file_is_fake_enum,
	320	NULL);
	321	stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
	322	if (stub_file->the_bfd == NULL
	323	\|\| ! bfd_set_arch_mach (stub_file->the_bfd,
	324	bfd_get_arch (link_info.output_bfd),
	325	bfd_get_mach (link_info.output_bfd)))
	326	{
df5f2391	327	einfo (_("%F%P: can not create BFD: %E\n"));
a06ea964 NC	328	return;
	329	}
	330
	331	stub_file->the_bfd->flags \|= BFD_LINKER_CREATED;
	332	ldlang_add_file (stub_file);
	333	}
	334
	335	/* Avoid processing the fake stub_file in vercheck, stat_needed and
	336	check_needed routines. */
	337
	338	static void (real_func) (lang_input_statement_type );
	339
	340	static void aarch64_for_each_input_file_wrapper (lang_input_statement_type *l)
	341	{
	342	if (l != stub_file)
	343	(*real_func) (l);
	344	}
	345
	346	static void
	347	aarch64_lang_for_each_input_file (void (func) (lang_input_statement_type ))
	348	{
	349	real_func = func;
	350	lang_for_each_input_file (&aarch64_for_each_input_file_wrapper);
	351	}
	352
	353	#define lang_for_each_input_file aarch64_lang_for_each_input_file
	354
	355	EOF
	356
	357	# Define some shell vars to insert bits of code into the standard elf
	358	# parse_args and list_options functions.
	359	#
	360	PARSE_AND_LIST_PROLOGUE='
	361	#define OPTION_NO_ENUM_SIZE_WARNING 309
	362	#define OPTION_PIC_VENEER 310
6c19b93b	363	#define OPTION_STUBGROUP_SIZE 311
a06ea964	364	#define OPTION_NO_WCHAR_SIZE_WARNING 312
68fcca92	365	#define OPTION_FIX_ERRATUM_835769 313
4106101c	366	#define OPTION_FIX_ERRATUM_843419 314
1f56df9d	367	#define OPTION_NO_APPLY_DYNAMIC_RELOCS 315
a06ea964 NC	368	'
	369
	370	PARSE_AND_LIST_SHORTOPTS=p
	371
	372	PARSE_AND_LIST_LONGOPTS='
	373	{ "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
	374	{ "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
	375	{ "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
	376	{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
	377	{ "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
68fcca92	378	{ "fix-cortex-a53-835769", no_argument, NULL, OPTION_FIX_ERRATUM_835769},
4106101c	379	{ "fix-cortex-a53-843419", no_argument, NULL, OPTION_FIX_ERRATUM_843419},
1f56df9d	380	{ "no-apply-dynamic-relocs", no_argument, NULL, OPTION_NO_APPLY_DYNAMIC_RELOCS},
a06ea964 NC	381	'
	382
	383	PARSE_AND_LIST_OPTIONS='
	384	fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible\n"
	385	" enum sizes\n"));
eca4b721	386	fprintf (file, _(" --no-wchar-size-warning Don'\''t warn about objects with incompatible\n"
a06ea964 NC	387	" wchar_t sizes\n"));
	388	fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n"));
	389	fprintf (file, _("\
df5f2391 AM	390	--stub-group-size=N Maximum size of a group of input sections that\n\
	391	can be handled by one stub section. A negative\n\
	392	value locates all stubs after their branches\n\
	393	(with a group size of -N), while a positive\n\
	394	value allows two groups of input sections, one\n\
	395	before, and one after each stub section.\n\
	396	Values of +/-1 indicate the linker should\n\
	397	choose suitable defaults.\n"));
68fcca92	398	fprintf (file, _(" --fix-cortex-a53-835769 Fix erratum 835769\n"));
4106101c	399	fprintf (file, _(" --fix-cortex-a53-843419 Fix erratum 843419\n"));
df5f2391	400	fprintf (file, _(" --no-apply-dynamic-relocs Do not apply link-time values for dynamic relocations\n"));
a06ea964 NC	401	'
	402
	403	PARSE_AND_LIST_ARGS_CASES='
	404	case '\'p\'':
	405	/* Only here for backwards compatibility. */
	406	break;
	407
	408	case OPTION_NO_ENUM_SIZE_WARNING:
	409	no_enum_size_warning = 1;
	410	break;
	411
	412	case OPTION_NO_WCHAR_SIZE_WARNING:
	413	no_wchar_size_warning = 1;
	414	break;
	415
	416	case OPTION_PIC_VENEER:
	417	pic_veneer = 1;
	418	break;
	419
68fcca92 JW	420	case OPTION_FIX_ERRATUM_835769:
	421	fix_erratum_835769 = 1;
	422	break;
	423
4106101c MS	424	case OPTION_FIX_ERRATUM_843419:
	425	fix_erratum_843419 = 1;
	426	break;
	427
1f56df9d JW	428	case OPTION_NO_APPLY_DYNAMIC_RELOCS:
	429	no_apply_dynamic_relocs = 1;
	430	break;
	431
a06ea964 NC	432	case OPTION_STUBGROUP_SIZE:
	433	{
	434	const char *end;
	435
6c19b93b AM	436	group_size = bfd_scan_vma (optarg, &end, 0);
6c19b93b AM	437	if (*end)
df5f2391	438	einfo (_("%F%P: invalid number `%s'\''\n"), optarg);
a06ea964 NC	439	}
	440	break;
	441	'
	442
	443	# We have our own before_allocation etc. functions, but they call
	444	# the standard routines, so give them a different name.
	445	LDEMUL_BEFORE_ALLOCATION=aarch64_elf_before_allocation
	446	LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
	447	LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=aarch64_elf_create_output_section_statements
	448
	449	# Replace the elf before_parse function with our own.
	450	LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
	451
	452	# Call the extra arm-elf function
	453	LDEMUL_FINISH=gld${EMULATION_NAME}_finish