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

# This shell script emits a C file. -*- C -*-
#   Copyright (C) 2009-2014 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 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, 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 && !link_info.relocatable)
    {
      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${EMULATION_NAME}_finish (void)
{
  if (! link_info.relocatable)
    {
      /* Now build the linker stubs.  */
      if (stub_file->the_bfd->sections != NULL)
	{
	  if (! elf${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);

  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
'

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},
'

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"
		   ));
'

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_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${EMULATION_NAME}_finish
Commit	Line	Data
a06ea964	1	# This shell script emits a C file. -- C --
4b95cf5c	2	# Copyright (C) 2009-2014 Free Software Foundation, Inc.
a06ea964 NC	3	# Contributed by ARM Ltd.
	4	#
	5	# This file is part of the GNU Binutils.
	6	#
	7	# This program is free software; you can redistribute it and/or modify
	8	# it under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 3 of the license, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful,
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	# GNU General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; see the file COPYING3. If not,
	19	# see <http://www.gnu.org/licenses/>.
	20	#
	21
	22	# This file is sourced from elf32.em, and defines extra aarch64-elf
	23	# specific routines.
	24	#
	25	fragment <<EOF
	26
	27	#include "ldctor.h"
	28	#include "elf/aarch64.h"
	29
	30	static int no_enum_size_warning = 0;
	31	static int no_wchar_size_warning = 0;
	32	static int pic_veneer = 0;
	33
	34	static void
	35	gld${EMULATION_NAME}_before_parse (void)
	36	{
	37	#ifndef TARGET_ /* I.e., if not generic. */
	38	ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
	39	#endif /* not TARGET_ */
	40	input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
	41	config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
e2caaa1f	42	config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
a06ea964 NC	43	}
	44
	45	static void
	46	aarch64_elf_before_allocation (void)
	47	{
	48	/* We should be able to set the size of the interworking stub section. We
	49	can't do it until later if we have dynamic sections, though. */
	50	if (! elf_hash_table (&link_info)->dynamic_sections_created)
	51	{
	52	/* Here we rummage through the found bfds to collect information. */
	53	LANG_FOR_EACH_INPUT_STATEMENT (is)
	54	{
	55	/* Initialise mapping tables for code/data. */
4390599b	56	bfd_elf${ELFSIZE}_aarch64_init_maps (is->the_bfd);
a06ea964 NC	57	}
	58	}
	59
	60	/* Call the standard elf routine. */
	61	gld${EMULATION_NAME}_before_allocation ();
	62	}
	63
	64	/* Fake input file for stubs. */
	65	static lang_input_statement_type *stub_file;
	66
	67	/* Whether we need to call gldarm_layout_sections_again. */
	68	static int need_laying_out = 0;
	69
	70	/* Maximum size of a group of input sections that can be handled by
	71	one stub section. A value of +/-1 indicates the bfd back-end
	72	should use a suitable default size. */
	73	static bfd_signed_vma group_size = 1;
	74
	75	struct hook_stub_info
	76	{
	77	lang_statement_list_type add;
	78	asection *input_section;
	79	};
	80
	81	/* Traverse the linker tree to find the spot where the stub goes. */
	82
	83	static bfd_boolean
	84	hook_in_stub (struct hook_stub_info info, lang_statement_union_type *lp)
	85	{
	86	lang_statement_union_type *l;
	87	bfd_boolean ret;
	88
	89	for (; (l = *lp) != NULL; lp = &l->header.next)
	90	{
	91	switch (l->header.type)
	92	{
	93	case lang_constructors_statement_enum:
	94	ret = hook_in_stub (info, &constructor_list.head);
	95	if (ret)
	96	return ret;
	97	break;
	98
	99	case lang_output_section_statement_enum:
	100	ret = hook_in_stub (info,
	101	&l->output_section_statement.children.head);
	102	if (ret)
	103	return ret;
	104	break;
	105
	106	case lang_wild_statement_enum:
	107	ret = hook_in_stub (info, &l->wild_statement.children.head);
	108	if (ret)
	109	return ret;
	110	break;
	111
	112	case lang_group_statement_enum:
	113	ret = hook_in_stub (info, &l->group_statement.children.head);
	114	if (ret)
	115	return ret;
	116	break;
	117
	118	case lang_input_section_enum:
	119	if (l->input_section.section == info->input_section)
	120	{
121	/* We've found our section. Insert the stub immediately
122	after its associated input section. */
123	*(info->add.tail) = l->header.next;
124	l->header.next = info->add.head;
125	return TRUE;
126	}
127	break;
128
129	case lang_data_statement_enum:
130	case lang_reloc_statement_enum:
131	case lang_object_symbols_statement_enum:
132	case lang_output_statement_enum:
133	case lang_target_statement_enum:
134	case lang_input_statement_enum:
135	case lang_assignment_statement_enum:
136	case lang_padding_statement_enum:
137	case lang_address_statement_enum:
138	case lang_fill_statement_enum:
139	break;
140
141	default:
142	FAIL ();
143	break;
144	}
145	}
146	return FALSE;
147	}
148
149
4390599b	150	/* Call-back for elf${ELFSIZE}_aarch64_size_stubs. */
a06ea964 NC	151
	152	/* Create a new stub section, and arrange for it to be linked
	153	immediately after INPUT_SECTION. */
	154
	155	static asection *
4390599b	156	elf${ELFSIZE}_aarch64_add_stub_section (const char *stub_sec_name,
a06ea964 NC	157	asection *input_section)
	158	{
	159	asection *stub_sec;
	160	flagword flags;
	161	asection *output_section;
a06ea964 NC	162	lang_output_section_statement_type *os;
	163	struct hook_stub_info info;
	164
	165	flags = (SEC_ALLOC \| SEC_LOAD \| SEC_READONLY \| SEC_CODE
	166	\| SEC_HAS_CONTENTS \| SEC_RELOC \| SEC_IN_MEMORY \| SEC_KEEP);
	167	stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
	168	stub_sec_name, flags);
	169	if (stub_sec == NULL)
	170	goto err_ret;
	171
	172	bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 3);
	173
	174	output_section = input_section->output_section;
24ef1aa7	175	os = lang_output_section_get (output_section);
a06ea964 NC	176
	177	info.input_section = input_section;
	178	lang_list_init (&info.add);
	179	lang_add_section (&info.add, stub_sec, NULL, os);
	180
	181	if (info.add.head == NULL)
	182	goto err_ret;
	183
	184	if (hook_in_stub (&info, &os->children.head))
	185	return stub_sec;
	186
	187	err_ret:
	188	einfo ("%X%P: can not make stub section: %E\n");
	189	return NULL;
	190	}
	191
4390599b	192	/* Another call-back for elf${ELFSIZE}_aarch64_size_stubs. */
a06ea964 NC	193
	194	static void
	195	gldaarch64_layout_sections_again (void)
	196	{
	197	/* If we have changed sizes of the stub sections, then we need
	198	to recalculate all the section offsets. This may mean we need to
	199	add even more stubs. */
	200	gld${EMULATION_NAME}_map_segments (TRUE);
	201	need_laying_out = -1;
	202	}
	203
	204	static void
	205	build_section_lists (lang_statement_union_type *statement)
	206	{
	207	if (statement->header.type == lang_input_section_enum)
	208	{
	209	asection *i = statement->input_section.section;
	210
	211	if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms
	212	&& (i->flags & SEC_EXCLUDE) == 0
	213	&& i->output_section != NULL
	214	&& i->output_section->owner == link_info.output_bfd)
4390599b	215	elf${ELFSIZE}_aarch64_next_input_section (& link_info, i);
a06ea964 NC	216	}
	217	}
	218
	219	static void
	220	gld${EMULATION_NAME}_after_allocation (void)
	221	{
75938853 AM	222	int ret;
75938853 AM	223
a06ea964 NC	224	/* bfd_elf32_discard_info just plays with debugging sections,
	225	ie. doesn't affect any code, so we can delay resizing the
	226	sections. It's likely we'll resize everything in the process of
	227	adding stubs. */
75938853 AM	228	ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
	229	if (ret < 0)
	230	{
	231	einfo ("%X%P: .eh_frame/.stab edit: %E\n");
	232	return;
	233	}
	234	else if (ret > 0)
a06ea964 NC	235	need_laying_out = 1;
	236
	237	/* If generating a relocatable output file, then we don't
	238	have to examine the relocs. */
	239	if (stub_file != NULL && !link_info.relocatable)
	240	{
75938853 AM	241	ret = elf${ELFSIZE}_aarch64_setup_section_lists (link_info.output_bfd,
75938853 AM	242	&link_info);
a06ea964 NC	243	if (ret != 0)
	244	{
	245	if (ret < 0)
	246	{
	247	einfo ("%X%P: could not compute sections lists for stub generation: %E\n");
	248	return;
	249	}
	250
	251	lang_for_each_statement (build_section_lists);
	252
	253	/* Call into the BFD backend to do the real work. */
4390599b	254	if (! elf${ELFSIZE}_aarch64_size_stubs (link_info.output_bfd,
a06ea964 NC	255	stub_file->the_bfd,
	256	& link_info,
	257	group_size,
4390599b	258	& elf${ELFSIZE}_aarch64_add_stub_section,
a06ea964 NC	259	& gldaarch64_layout_sections_again))
	260	{
	261	einfo ("%X%P: cannot size stub section: %E\n");
	262	return;
	263	}
	264	}
	265	}
	266
	267	if (need_laying_out != -1)
	268	gld${EMULATION_NAME}_map_segments (need_laying_out);
	269	}
	270
	271	static void
	272	gld${EMULATION_NAME}_finish (void)
	273	{
	274	if (! link_info.relocatable)
	275	{
	276	/* Now build the linker stubs. */
	277	if (stub_file->the_bfd->sections != NULL)
	278	{
4390599b	279	if (! elf${ELFSIZE}_aarch64_build_stubs (& link_info))
a06ea964 NC	280	einfo ("%X%P: can not build stubs: %E\n");
	281	}
	282	}
	283
	284	finish_default ();
	285	}
	286
	287	/* This is a convenient point to tell BFD about target specific flags.
	288	After the output has been created, but before inputs are read. */
	289	static void
	290	aarch64_elf_create_output_section_statements (void)
	291	{
	292	if (strstr (bfd_get_target (link_info.output_bfd), "aarch64") == NULL)
	293	{
	294	/* The arm backend needs special fields in the output hash structure.
	295	These will only be created if the output format is an arm format,
	296	hence we do not support linking and changing output formats at the
	297	same time. Use a link followed by objcopy to change output formats. */
	298	einfo ("%F%X%P: error: Cannot change output format whilst linking AArch64 binaries.\n");
	299	return;
	300	}
	301
4390599b	302	bfd_elf${ELFSIZE}_aarch64_set_options (link_info.output_bfd, &link_info,
a06ea964 NC	303	no_enum_size_warning,
	304	no_wchar_size_warning,
	305	pic_veneer);
	306
	307	stub_file = lang_add_input_file ("linker stubs",
	308	lang_input_file_is_fake_enum,
	309	NULL);
	310	stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
	311	if (stub_file->the_bfd == NULL
	312	\|\| ! bfd_set_arch_mach (stub_file->the_bfd,
	313	bfd_get_arch (link_info.output_bfd),
	314	bfd_get_mach (link_info.output_bfd)))
	315	{
	316	einfo ("%X%P: can not create BFD %E\n");
	317	return;
	318	}
	319
	320	stub_file->the_bfd->flags \|= BFD_LINKER_CREATED;
	321	ldlang_add_file (stub_file);
	322	}
	323
	324	/* Avoid processing the fake stub_file in vercheck, stat_needed and
	325	check_needed routines. */
	326
	327	static void (real_func) (lang_input_statement_type );
	328
	329	static void aarch64_for_each_input_file_wrapper (lang_input_statement_type *l)
	330	{
	331	if (l != stub_file)
	332	(*real_func) (l);
	333	}
	334
	335	static void
	336	aarch64_lang_for_each_input_file (void (func) (lang_input_statement_type ))
	337	{
	338	real_func = func;
	339	lang_for_each_input_file (&aarch64_for_each_input_file_wrapper);
	340	}
	341
	342	#define lang_for_each_input_file aarch64_lang_for_each_input_file
	343
	344	EOF
	345
	346	# Define some shell vars to insert bits of code into the standard elf
	347	# parse_args and list_options functions.
	348	#
	349	PARSE_AND_LIST_PROLOGUE='
	350	#define OPTION_NO_ENUM_SIZE_WARNING 309
	351	#define OPTION_PIC_VENEER 310
	352	#define OPTION_STUBGROUP_SIZE 311
	353	#define OPTION_NO_WCHAR_SIZE_WARNING 312
	354	'
	355
	356	PARSE_AND_LIST_SHORTOPTS=p
	357
	358	PARSE_AND_LIST_LONGOPTS='
	359	{ "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
	360	{ "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
	361	{ "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
	362	{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
	363	{ "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
	364	'
	365
	366	PARSE_AND_LIST_OPTIONS='
367	fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible\n"
368	" enum sizes\n"));
369	fprintf (file, _(" --no-wchar-size-warning Don'\''t warn about objects with incompatible"
370	" wchar_t sizes\n"));
371	fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n"));
372	fprintf (file, _("\
373	--stub-group-size=N Maximum size of a group of input sections that can be\n\
374	handled by one stub section. A negative value\n\
375	locates all stubs after their branches (with a\n\
376	group size of -N), while a positive value allows\n\
377	two groups of input sections, one before, and one\n\
378	after each stub section. Values of +/-1 indicate\n\
379	the linker should choose suitable defaults.\n"
380	));
381	'
382
383	PARSE_AND_LIST_ARGS_CASES='
384	case '\'p\'':
385	/* Only here for backwards compatibility. */
386	break;
387
388	case OPTION_NO_ENUM_SIZE_WARNING:
389	no_enum_size_warning = 1;
390	break;
391
392	case OPTION_NO_WCHAR_SIZE_WARNING:
393	no_wchar_size_warning = 1;
394	break;
395
396	case OPTION_PIC_VENEER:
397	pic_veneer = 1;
398	break;
399
400	case OPTION_STUBGROUP_SIZE:
401	{
402	const char *end;
403
404	group_size = bfd_scan_vma (optarg, &end, 0);
405	if (*end)
406	einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
407	}
408	break;
409	'
410
411	# We have our own before_allocation etc. functions, but they call
412	# the standard routines, so give them a different name.
413	LDEMUL_BEFORE_ALLOCATION=aarch64_elf_before_allocation
414	LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
415	LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=aarch64_elf_create_output_section_statements
416
417	# Replace the elf before_parse function with our own.
418	LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
419
420	# Call the extra arm-elf function
421	LDEMUL_FINISH=gld${EMULATION_NAME}_finish