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

# This shell script emits a C file. -*- C -*-
#   Copyright (C) 2009-2016 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 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`;
}

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;

  bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 2);

  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: cannot 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%X%P: error: Cannot change output format whilst linking AArch64 binaries.\n");
      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);

  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 ("%X%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
'

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},
'

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"
		   "                                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 can be\n\
                           handled by one stub section.  A negative value\n\
                           locates all stubs after their branches (with a\n\
                           group size of -N), while a positive value allows\n\
                           two groups of input sections, one before, and one\n\
                           after each stub section.  Values of +/-1 indicate\n\
                           the linker should choose suitable defaults.\n"
		   ));
  fprintf (file, _("  --fix-cortex-a53-835769      Fix erratum 835769\n"));
  fprintf (file, _("  --fix-cortex-a53-843419      Fix erratum 843419\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_STUBGROUP_SIZE:
      {
	const char *end;

        group_size = bfd_scan_vma (optarg, &end, 0);
        if (*end)
	  einfo (_("%P%F: 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${EMULATION_NAME}_finish
Commit	Line	Data
a06ea964	1	# This shell script emits a C file. -- C --
6f2750fe	2	# Copyright (C) 2009-2016 Free Software Foundation, Inc.
a06ea964 NC	3	# Contributed by ARM Ltd.
	4	#
	5	# This file is part of the GNU Binutils.
	6	#
	7	# This program is free software; you can redistribute it and/or modify
	8	# it under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 3 of the license, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful,
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	# GNU General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; see the file COPYING3. If not,
	19	# see <http://www.gnu.org/licenses/>.
	20	#
	21
	22	# This file is sourced from elf32.em, and defines extra aarch64-elf
	23	# specific routines.
	24	#
	25	fragment <<EOF
	26
	27	#include "ldctor.h"
	28	#include "elf/aarch64.h"
	29
	30	static int no_enum_size_warning = 0;
	31	static int no_wchar_size_warning = 0;
	32	static int pic_veneer = 0;
68fcca92	33	static int fix_erratum_835769 = 0;
4106101c	34	static int fix_erratum_843419 = 0;
a06ea964 NC	35
	36	static void
	37	gld${EMULATION_NAME}_before_parse (void)
	38	{
	39	#ifndef TARGET_ /* I.e., if not generic. */
	40	ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
	41	#endif /* not TARGET_ */
	42	input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
	43	config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
e2caaa1f	44	config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
a06ea964 NC	45	}
	46
	47	static void
	48	aarch64_elf_before_allocation (void)
	49	{
	50	/* We should be able to set the size of the interworking stub section. We
	51	can't do it until later if we have dynamic sections, though. */
	52	if (! elf_hash_table (&link_info)->dynamic_sections_created)
	53	{
	54	/* Here we rummage through the found bfds to collect information. */
	55	LANG_FOR_EACH_INPUT_STATEMENT (is)
	56	{
	57	/* Initialise mapping tables for code/data. */
4390599b	58	bfd_elf${ELFSIZE}_aarch64_init_maps (is->the_bfd);
a06ea964 NC	59	}
	60	}
	61
	62	/* Call the standard elf routine. */
	63	gld${EMULATION_NAME}_before_allocation ();
	64	}
	65
	66	/* Fake input file for stubs. */
	67	static lang_input_statement_type *stub_file;
	68
	69	/* Whether we need to call gldarm_layout_sections_again. */
	70	static int need_laying_out = 0;
	71
	72	/* Maximum size of a group of input sections that can be handled by
	73	one stub section. A value of +/-1 indicates the bfd back-end
	74	should use a suitable default size. */
	75	static bfd_signed_vma group_size = 1;
	76
	77	struct hook_stub_info
	78	{
	79	lang_statement_list_type add;
	80	asection *input_section;
	81	};
	82
	83	/* Traverse the linker tree to find the spot where the stub goes. */
	84
	85	static bfd_boolean
	86	hook_in_stub (struct hook_stub_info info, lang_statement_union_type *lp)
	87	{
	88	lang_statement_union_type *l;
	89	bfd_boolean ret;
	90
	91	for (; (l = *lp) != NULL; lp = &l->header.next)
	92	{
	93	switch (l->header.type)
	94	{
	95	case lang_constructors_statement_enum:
	96	ret = hook_in_stub (info, &constructor_list.head);
	97	if (ret)
	98	return ret;
	99	break;
	100
	101	case lang_output_section_statement_enum:
	102	ret = hook_in_stub (info,
	103	&l->output_section_statement.children.head);
	104	if (ret)
	105	return ret;
	106	break;
	107
	108	case lang_wild_statement_enum:
	109	ret = hook_in_stub (info, &l->wild_statement.children.head);
	110	if (ret)
	111	return ret;
	112	break;
	113
	114	case lang_group_statement_enum:
	115	ret = hook_in_stub (info, &l->group_statement.children.head);
	116	if (ret)
	117	return ret;
	118	break;
	119
	120	case lang_input_section_enum:
	121	if (l->input_section.section == info->input_section)
	122	{
123	/* We've found our section. Insert the stub immediately
124	after its associated input section. */
125	*(info->add.tail) = l->header.next;
126	l->header.next = info->add.head;
127	return TRUE;
128	}
129	break;
130
131	case lang_data_statement_enum:
132	case lang_reloc_statement_enum:
133	case lang_object_symbols_statement_enum:
134	case lang_output_statement_enum:
135	case lang_target_statement_enum:
136	case lang_input_statement_enum:
137	case lang_assignment_statement_enum:
138	case lang_padding_statement_enum:
139	case lang_address_statement_enum:
140	case lang_fill_statement_enum:
141	break;
142
143	default:
144	FAIL ();
145	break;
146	}
147	}
148	return FALSE;
149	}
150
151
4390599b	152	/* Call-back for elf${ELFSIZE}_aarch64_size_stubs. */
a06ea964 NC	153
	154	/* Create a new stub section, and arrange for it to be linked
	155	immediately after INPUT_SECTION. */
	156
	157	static asection *
4390599b	158	elf${ELFSIZE}_aarch64_add_stub_section (const char *stub_sec_name,
499c37b5	159	asection *input_section)
a06ea964 NC	160	{
	161	asection *stub_sec;
	162	flagword flags;
	163	asection *output_section;
a06ea964 NC	164	lang_output_section_statement_type *os;
	165	struct hook_stub_info info;
	166
	167	flags = (SEC_ALLOC \| SEC_LOAD \| SEC_READONLY \| SEC_CODE
	168	\| SEC_HAS_CONTENTS \| SEC_RELOC \| SEC_IN_MEMORY \| SEC_KEEP);
	169	stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
	170	stub_sec_name, flags);
	171	if (stub_sec == NULL)
	172	goto err_ret;
	173
d9ced15d	174	bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 2);
a06ea964 NC	175
a06ea964 NC	176	output_section = input_section->output_section;
24ef1aa7	177	os = lang_output_section_get (output_section);
a06ea964 NC	178
	179	info.input_section = input_section;
	180	lang_list_init (&info.add);
	181	lang_add_section (&info.add, stub_sec, NULL, os);
	182
	183	if (info.add.head == NULL)
	184	goto err_ret;
	185
	186	if (hook_in_stub (&info, &os->children.head))
	187	return stub_sec;
	188
	189	err_ret:
	190	einfo ("%X%P: can not make stub section: %E\n");
	191	return NULL;
	192	}
	193
4390599b	194	/* Another call-back for elf${ELFSIZE}_aarch64_size_stubs. */
a06ea964 NC	195
	196	static void
	197	gldaarch64_layout_sections_again (void)
	198	{
	199	/* If we have changed sizes of the stub sections, then we need
	200	to recalculate all the section offsets. This may mean we need to
	201	add even more stubs. */
	202	gld${EMULATION_NAME}_map_segments (TRUE);
	203	need_laying_out = -1;
	204	}
	205
	206	static void
	207	build_section_lists (lang_statement_union_type *statement)
	208	{
	209	if (statement->header.type == lang_input_section_enum)
	210	{
	211	asection *i = statement->input_section.section;
	212
	213	if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms
	214	&& (i->flags & SEC_EXCLUDE) == 0
	215	&& i->output_section != NULL
	216	&& i->output_section->owner == link_info.output_bfd)
4390599b	217	elf${ELFSIZE}_aarch64_next_input_section (& link_info, i);
a06ea964 NC	218	}
	219	}
	220
	221	static void
	222	gld${EMULATION_NAME}_after_allocation (void)
	223	{
75938853 AM	224	int ret;
75938853 AM	225
a06ea964 NC	226	/* bfd_elf32_discard_info just plays with debugging sections,
	227	ie. doesn't affect any code, so we can delay resizing the
	228	sections. It's likely we'll resize everything in the process of
	229	adding stubs. */
75938853 AM	230	ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
	231	if (ret < 0)
	232	{
	233	einfo ("%X%P: .eh_frame/.stab edit: %E\n");
	234	return;
	235	}
	236	else if (ret > 0)
a06ea964 NC	237	need_laying_out = 1;
	238
	239	/* If generating a relocatable output file, then we don't
	240	have to examine the relocs. */
0e1862bb	241	if (stub_file != NULL && !bfd_link_relocatable (&link_info))
a06ea964	242	{
75938853 AM	243	ret = elf${ELFSIZE}_aarch64_setup_section_lists (link_info.output_bfd,
75938853 AM	244	&link_info);
a06ea964 NC	245	if (ret != 0)
	246	{
	247	if (ret < 0)
	248	{
	249	einfo ("%X%P: could not compute sections lists for stub generation: %E\n");
	250	return;
	251	}
	252
	253	lang_for_each_statement (build_section_lists);
	254
	255	/* Call into the BFD backend to do the real work. */
4390599b	256	if (! elf${ELFSIZE}_aarch64_size_stubs (link_info.output_bfd,
a06ea964 NC	257	stub_file->the_bfd,
	258	& link_info,
	259	group_size,
4390599b	260	& elf${ELFSIZE}_aarch64_add_stub_section,
a06ea964 NC	261	& gldaarch64_layout_sections_again))
	262	{
	263	einfo ("%X%P: cannot size stub section: %E\n");
	264	return;
	265	}
	266	}
	267	}
	268
	269	if (need_laying_out != -1)
	270	gld${EMULATION_NAME}_map_segments (need_laying_out);
	271	}
	272
	273	static void
	274	gld${EMULATION_NAME}_finish (void)
	275	{
0e1862bb	276	if (!bfd_link_relocatable (&link_info))
a06ea964 NC	277	{
	278	/* Now build the linker stubs. */
	279	if (stub_file->the_bfd->sections != NULL)
	280	{
4390599b	281	if (! elf${ELFSIZE}_aarch64_build_stubs (& link_info))
a06ea964 NC	282	einfo ("%X%P: can not build stubs: %E\n");
	283	}
	284	}
	285
	286	finish_default ();
	287	}
	288
	289	/* This is a convenient point to tell BFD about target specific flags.
	290	After the output has been created, but before inputs are read. */
	291	static void
	292	aarch64_elf_create_output_section_statements (void)
	293	{
	294	if (strstr (bfd_get_target (link_info.output_bfd), "aarch64") == NULL)
	295	{
	296	/* The arm backend needs special fields in the output hash structure.
	297	These will only be created if the output format is an arm format,
	298	hence we do not support linking and changing output formats at the
	299	same time. Use a link followed by objcopy to change output formats. */
	300	einfo ("%F%X%P: error: Cannot change output format whilst linking AArch64 binaries.\n");
	301	return;
	302	}
	303
4390599b	304	bfd_elf${ELFSIZE}_aarch64_set_options (link_info.output_bfd, &link_info,
a06ea964 NC	305	no_enum_size_warning,
a06ea964 NC	306	no_wchar_size_warning,
4106101c MS	307	pic_veneer,
4106101c MS	308	fix_erratum_835769, fix_erratum_843419);
a06ea964 NC	309
	310	stub_file = lang_add_input_file ("linker stubs",
	311	lang_input_file_is_fake_enum,
	312	NULL);
	313	stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
	314	if (stub_file->the_bfd == NULL
	315	\|\| ! bfd_set_arch_mach (stub_file->the_bfd,
	316	bfd_get_arch (link_info.output_bfd),
	317	bfd_get_mach (link_info.output_bfd)))
	318	{
	319	einfo ("%X%P: can not create BFD %E\n");
	320	return;
	321	}
	322
	323	stub_file->the_bfd->flags \|= BFD_LINKER_CREATED;
	324	ldlang_add_file (stub_file);
	325	}
	326
	327	/* Avoid processing the fake stub_file in vercheck, stat_needed and
	328	check_needed routines. */
	329
	330	static void (real_func) (lang_input_statement_type );
	331
	332	static void aarch64_for_each_input_file_wrapper (lang_input_statement_type *l)
	333	{
	334	if (l != stub_file)
	335	(*real_func) (l);
	336	}
	337
	338	static void
	339	aarch64_lang_for_each_input_file (void (func) (lang_input_statement_type ))
	340	{
	341	real_func = func;
	342	lang_for_each_input_file (&aarch64_for_each_input_file_wrapper);
	343	}
	344
	345	#define lang_for_each_input_file aarch64_lang_for_each_input_file
	346
	347	EOF
	348
	349	# Define some shell vars to insert bits of code into the standard elf
	350	# parse_args and list_options functions.
	351	#
	352	PARSE_AND_LIST_PROLOGUE='
	353	#define OPTION_NO_ENUM_SIZE_WARNING 309
	354	#define OPTION_PIC_VENEER 310
	355	#define OPTION_STUBGROUP_SIZE 311
	356	#define OPTION_NO_WCHAR_SIZE_WARNING 312
68fcca92	357	#define OPTION_FIX_ERRATUM_835769 313
4106101c	358	#define OPTION_FIX_ERRATUM_843419 314
a06ea964 NC	359	'
	360
	361	PARSE_AND_LIST_SHORTOPTS=p
	362
	363	PARSE_AND_LIST_LONGOPTS='
	364	{ "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
	365	{ "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
	366	{ "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
	367	{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
	368	{ "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
68fcca92	369	{ "fix-cortex-a53-835769", no_argument, NULL, OPTION_FIX_ERRATUM_835769},
4106101c	370	{ "fix-cortex-a53-843419", no_argument, NULL, OPTION_FIX_ERRATUM_843419},
a06ea964 NC	371	'
	372
	373	PARSE_AND_LIST_OPTIONS='
	374	fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible\n"
	375	" enum sizes\n"));
	376	fprintf (file, _(" --no-wchar-size-warning Don'\''t warn about objects with incompatible"
	377	" wchar_t sizes\n"));
	378	fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n"));
	379	fprintf (file, _("\
	380	--stub-group-size=N Maximum size of a group of input sections that can be\n\
	381	handled by one stub section. A negative value\n\
	382	locates all stubs after their branches (with a\n\
	383	group size of -N), while a positive value allows\n\
	384	two groups of input sections, one before, and one\n\
	385	after each stub section. Values of +/-1 indicate\n\
	386	the linker should choose suitable defaults.\n"
	387	));
68fcca92	388	fprintf (file, _(" --fix-cortex-a53-835769 Fix erratum 835769\n"));
4106101c	389	fprintf (file, _(" --fix-cortex-a53-843419 Fix erratum 843419\n"));
a06ea964 NC	390	'
	391
	392	PARSE_AND_LIST_ARGS_CASES='
	393	case '\'p\'':
	394	/* Only here for backwards compatibility. */
	395	break;
	396
	397	case OPTION_NO_ENUM_SIZE_WARNING:
	398	no_enum_size_warning = 1;
	399	break;
	400
	401	case OPTION_NO_WCHAR_SIZE_WARNING:
	402	no_wchar_size_warning = 1;
	403	break;
	404
	405	case OPTION_PIC_VENEER:
	406	pic_veneer = 1;
	407	break;
	408
68fcca92 JW	409	case OPTION_FIX_ERRATUM_835769:
	410	fix_erratum_835769 = 1;
	411	break;
	412
4106101c MS	413	case OPTION_FIX_ERRATUM_843419:
	414	fix_erratum_843419 = 1;
	415	break;
	416
a06ea964 NC	417	case OPTION_STUBGROUP_SIZE:
	418	{
	419	const char *end;
	420
	421	group_size = bfd_scan_vma (optarg, &end, 0);
	422	if (*end)
	423	einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
	424	}
	425	break;
	426	'
	427
	428	# We have our own before_allocation etc. functions, but they call
	429	# the standard routines, so give them a different name.
	430	LDEMUL_BEFORE_ALLOCATION=aarch64_elf_before_allocation
	431	LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
	432	LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=aarch64_elf_create_output_section_statements
	433
	434	# Replace the elf before_parse function with our own.
	435	LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
	436
	437	# Call the extra arm-elf function
	438	LDEMUL_FINISH=gld${EMULATION_NAME}_finish