[deliverable/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 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.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;

  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,
				 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 ("%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
#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"
		   "                                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"));
  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 (_("%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${EMULATION_NAME}_finish
Commit	Line	Data
a06ea964	1	# This shell script emits a C file. -- C --
6f2750fe	2	# Copyright (C) 2009-2016 Free Software Foundation, Inc.
a06ea964 NC	3	# Contributed by ARM Ltd.
	4	#
	5	# This file is part of the GNU Binutils.
	6	#
	7	# This program is free software; you can redistribute it and/or modify
	8	# it under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 3 of the license, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful,
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	# GNU General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; see the file COPYING3. If not,
	19	# see <http://www.gnu.org/licenses/>.
	20	#
	21
	22	# This file is sourced from elf32.em, and defines extra aarch64-elf
	23	# specific routines.
	24	#
	25	fragment <<EOF
	26
	27	#include "ldctor.h"
	28	#include "elf/aarch64.h"
	29
	30	static int no_enum_size_warning = 0;
	31	static int no_wchar_size_warning = 0;
	32	static int pic_veneer = 0;
68fcca92	33	static int fix_erratum_835769 = 0;
4106101c	34	static int fix_erratum_843419 = 0;
1f56df9d	35	static int no_apply_dynamic_relocs = 0;
a06ea964 NC	36
	37	static void
	38	gld${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${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
576438f0	46	link_info.relro = DEFAULT_LD_Z_RELRO;
a06ea964 NC	47	}
	48
	49	static void
	50	aarch64_elf_before_allocation (void)
	51	{
	52	/* We should be able to set the size of the interworking stub section. We
	53	can't do it until later if we have dynamic sections, though. */
	54	if (! elf_hash_table (&link_info)->dynamic_sections_created)
	55	{
	56	/* Here we rummage through the found bfds to collect information. */
	57	LANG_FOR_EACH_INPUT_STATEMENT (is)
	58	{
	59	/* Initialise mapping tables for code/data. */
4390599b	60	bfd_elf${ELFSIZE}_aarch64_init_maps (is->the_bfd);
a06ea964 NC	61	}
	62	}
	63
	64	/* Call the standard elf routine. */
	65	gld${EMULATION_NAME}_before_allocation ();
	66	}
	67
	68	/* Fake input file for stubs. */
	69	static lang_input_statement_type *stub_file;
	70
	71	/* Whether we need to call gldarm_layout_sections_again. */
	72	static int need_laying_out = 0;
	73
	74	/* Maximum size of a group of input sections that can be handled by
	75	one stub section. A value of +/-1 indicates the bfd back-end
	76	should use a suitable default size. */
	77	static bfd_signed_vma group_size = 1;
	78
	79	struct hook_stub_info
	80	{
	81	lang_statement_list_type add;
	82	asection *input_section;
	83	};
	84
	85	/* Traverse the linker tree to find the spot where the stub goes. */
	86
	87	static bfd_boolean
	88	hook_in_stub (struct hook_stub_info info, lang_statement_union_type *lp)
	89	{
	90	lang_statement_union_type *l;
	91	bfd_boolean ret;
	92
	93	for (; (l = *lp) != NULL; lp = &l->header.next)
	94	{
	95	switch (l->header.type)
	96	{
	97	case lang_constructors_statement_enum:
	98	ret = hook_in_stub (info, &constructor_list.head);
	99	if (ret)
	100	return ret;
	101	break;
	102
	103	case lang_output_section_statement_enum:
	104	ret = hook_in_stub (info,
	105	&l->output_section_statement.children.head);
	106	if (ret)
	107	return ret;
	108	break;
	109
	110	case lang_wild_statement_enum:
	111	ret = hook_in_stub (info, &l->wild_statement.children.head);
	112	if (ret)
	113	return ret;
	114	break;
	115
	116	case lang_group_statement_enum:
	117	ret = hook_in_stub (info, &l->group_statement.children.head);
	118	if (ret)
	119	return ret;
	120	break;
	121
	122	case lang_input_section_enum:
	123	if (l->input_section.section == info->input_section)
	124	{
125	/* We've found our section. Insert the stub immediately
126	after its associated input section. */
127	*(info->add.tail) = l->header.next;
128	l->header.next = info->add.head;
129	return TRUE;
130	}
131	break;
132
133	case lang_data_statement_enum:
134	case lang_reloc_statement_enum:
135	case lang_object_symbols_statement_enum:
136	case lang_output_statement_enum:
137	case lang_target_statement_enum:
138	case lang_input_statement_enum:
139	case lang_assignment_statement_enum:
140	case lang_padding_statement_enum:
141	case lang_address_statement_enum:
142	case lang_fill_statement_enum:
143	break;
144
145	default:
146	FAIL ();
147	break;
148	}
149	}
150	return FALSE;
151	}
152
153
4390599b	154	/* Call-back for elf${ELFSIZE}_aarch64_size_stubs. */
a06ea964 NC	155
	156	/* Create a new stub section, and arrange for it to be linked
	157	immediately after INPUT_SECTION. */
	158
	159	static asection *
4390599b	160	elf${ELFSIZE}_aarch64_add_stub_section (const char *stub_sec_name,
499c37b5	161	asection *input_section)
a06ea964 NC	162	{
	163	asection *stub_sec;
	164	flagword flags;
	165	asection *output_section;
a06ea964 NC	166	lang_output_section_statement_type *os;
	167	struct hook_stub_info info;
	168
	169	flags = (SEC_ALLOC \| SEC_LOAD \| SEC_READONLY \| SEC_CODE
	170	\| SEC_HAS_CONTENTS \| SEC_RELOC \| SEC_IN_MEMORY \| SEC_KEEP);
	171	stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
	172	stub_sec_name, flags);
	173	if (stub_sec == NULL)
	174	goto err_ret;
	175
d9ced15d	176	bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 2);
a06ea964 NC	177
a06ea964 NC	178	output_section = input_section->output_section;
24ef1aa7	179	os = lang_output_section_get (output_section);
a06ea964 NC	180
	181	info.input_section = input_section;
	182	lang_list_init (&info.add);
	183	lang_add_section (&info.add, stub_sec, NULL, os);
	184
	185	if (info.add.head == NULL)
	186	goto err_ret;
	187
	188	if (hook_in_stub (&info, &os->children.head))
	189	return stub_sec;
	190
	191	err_ret:
	192	einfo ("%X%P: can not make stub section: %E\n");
	193	return NULL;
	194	}
	195
4390599b	196	/* Another call-back for elf${ELFSIZE}_aarch64_size_stubs. */
a06ea964 NC	197
	198	static void
	199	gldaarch64_layout_sections_again (void)
	200	{
	201	/* If we have changed sizes of the stub sections, then we need
	202	to recalculate all the section offsets. This may mean we need to
	203	add even more stubs. */
	204	gld${EMULATION_NAME}_map_segments (TRUE);
	205	need_laying_out = -1;
	206	}
	207
	208	static void
	209	build_section_lists (lang_statement_union_type *statement)
	210	{
	211	if (statement->header.type == lang_input_section_enum)
	212	{
	213	asection *i = statement->input_section.section;
	214
	215	if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms
	216	&& (i->flags & SEC_EXCLUDE) == 0
	217	&& i->output_section != NULL
	218	&& i->output_section->owner == link_info.output_bfd)
4390599b	219	elf${ELFSIZE}_aarch64_next_input_section (& link_info, i);
a06ea964 NC	220	}
	221	}
	222
	223	static void
	224	gld${EMULATION_NAME}_after_allocation (void)
	225	{
75938853 AM	226	int ret;
75938853 AM	227
a06ea964 NC	228	/* bfd_elf32_discard_info just plays with debugging sections,
	229	ie. doesn't affect any code, so we can delay resizing the
	230	sections. It's likely we'll resize everything in the process of
	231	adding stubs. */
75938853 AM	232	ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
	233	if (ret < 0)
	234	{
	235	einfo ("%X%P: .eh_frame/.stab edit: %E\n");
	236	return;
	237	}
	238	else if (ret > 0)
a06ea964 NC	239	need_laying_out = 1;
	240
	241	/* If generating a relocatable output file, then we don't
	242	have to examine the relocs. */
0e1862bb	243	if (stub_file != NULL && !bfd_link_relocatable (&link_info))
a06ea964	244	{
75938853 AM	245	ret = elf${ELFSIZE}_aarch64_setup_section_lists (link_info.output_bfd,
75938853 AM	246	&link_info);
a06ea964 NC	247	if (ret != 0)
	248	{
	249	if (ret < 0)
	250	{
	251	einfo ("%X%P: could not compute sections lists for stub generation: %E\n");
	252	return;
	253	}
	254
	255	lang_for_each_statement (build_section_lists);
	256
	257	/* Call into the BFD backend to do the real work. */
4390599b	258	if (! elf${ELFSIZE}_aarch64_size_stubs (link_info.output_bfd,
a06ea964 NC	259	stub_file->the_bfd,
	260	& link_info,
	261	group_size,
4390599b	262	& elf${ELFSIZE}_aarch64_add_stub_section,
a06ea964 NC	263	& gldaarch64_layout_sections_again))
	264	{
	265	einfo ("%X%P: cannot size stub section: %E\n");
	266	return;
	267	}
	268	}
	269	}
	270
	271	if (need_laying_out != -1)
	272	gld${EMULATION_NAME}_map_segments (need_laying_out);
	273	}
	274
	275	static void
	276	gld${EMULATION_NAME}_finish (void)
	277	{
0e1862bb	278	if (!bfd_link_relocatable (&link_info))
a06ea964 NC	279	{
	280	/* Now build the linker stubs. */
	281	if (stub_file->the_bfd->sections != NULL)
	282	{
4390599b	283	if (! elf${ELFSIZE}_aarch64_build_stubs (& link_info))
a06ea964 NC	284	einfo ("%X%P: can not build stubs: %E\n");
	285	}
	286	}
	287
	288	finish_default ();
	289	}
	290
	291	/* This is a convenient point to tell BFD about target specific flags.
	292	After the output has been created, but before inputs are read. */
	293	static void
	294	aarch64_elf_create_output_section_statements (void)
	295	{
	296	if (strstr (bfd_get_target (link_info.output_bfd), "aarch64") == NULL)
	297	{
	298	/* The arm backend needs special fields in the output hash structure.
	299	These will only be created if the output format is an arm format,
	300	hence we do not support linking and changing output formats at the
	301	same time. Use a link followed by objcopy to change output formats. */
	302	einfo ("%F%X%P: error: Cannot change output format whilst linking AArch64 binaries.\n");
	303	return;
	304	}
	305
4390599b	306	bfd_elf${ELFSIZE}_aarch64_set_options (link_info.output_bfd, &link_info,
a06ea964 NC	307	no_enum_size_warning,
a06ea964 NC	308	no_wchar_size_warning,
4106101c	309	pic_veneer,
1f56df9d JW	310	fix_erratum_835769, fix_erratum_843419,
1f56df9d JW	311	no_apply_dynamic_relocs);
a06ea964 NC	312
	313	stub_file = lang_add_input_file ("linker stubs",
	314	lang_input_file_is_fake_enum,
	315	NULL);
	316	stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
	317	if (stub_file->the_bfd == NULL
	318	\|\| ! bfd_set_arch_mach (stub_file->the_bfd,
	319	bfd_get_arch (link_info.output_bfd),
	320	bfd_get_mach (link_info.output_bfd)))
	321	{
	322	einfo ("%X%P: can not create BFD %E\n");
	323	return;
	324	}
	325
	326	stub_file->the_bfd->flags \|= BFD_LINKER_CREATED;
	327	ldlang_add_file (stub_file);
	328	}
	329
	330	/* Avoid processing the fake stub_file in vercheck, stat_needed and
	331	check_needed routines. */
	332
	333	static void (real_func) (lang_input_statement_type );
	334
	335	static void aarch64_for_each_input_file_wrapper (lang_input_statement_type *l)
	336	{
	337	if (l != stub_file)
	338	(*real_func) (l);
	339	}
	340
	341	static void
	342	aarch64_lang_for_each_input_file (void (func) (lang_input_statement_type ))
	343	{
	344	real_func = func;
	345	lang_for_each_input_file (&aarch64_for_each_input_file_wrapper);
	346	}
	347
	348	#define lang_for_each_input_file aarch64_lang_for_each_input_file
	349
	350	EOF
	351
	352	# Define some shell vars to insert bits of code into the standard elf
	353	# parse_args and list_options functions.
	354	#
	355	PARSE_AND_LIST_PROLOGUE='
	356	#define OPTION_NO_ENUM_SIZE_WARNING 309
	357	#define OPTION_PIC_VENEER 310
	358	#define OPTION_STUBGROUP_SIZE 311
	359	#define OPTION_NO_WCHAR_SIZE_WARNING 312
68fcca92	360	#define OPTION_FIX_ERRATUM_835769 313
4106101c	361	#define OPTION_FIX_ERRATUM_843419 314
1f56df9d	362	#define OPTION_NO_APPLY_DYNAMIC_RELOCS 315
a06ea964 NC	363	'
	364
	365	PARSE_AND_LIST_SHORTOPTS=p
	366
	367	PARSE_AND_LIST_LONGOPTS='
	368	{ "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
	369	{ "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
	370	{ "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
	371	{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
	372	{ "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
68fcca92	373	{ "fix-cortex-a53-835769", no_argument, NULL, OPTION_FIX_ERRATUM_835769},
4106101c	374	{ "fix-cortex-a53-843419", no_argument, NULL, OPTION_FIX_ERRATUM_843419},
1f56df9d	375	{ "no-apply-dynamic-relocs", no_argument, NULL, OPTION_NO_APPLY_DYNAMIC_RELOCS},
a06ea964 NC	376	'
	377
	378	PARSE_AND_LIST_OPTIONS='
	379	fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible\n"
	380	" enum sizes\n"));
	381	fprintf (file, _(" --no-wchar-size-warning Don'\''t warn about objects with incompatible"
	382	" wchar_t sizes\n"));
	383	fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n"));
	384	fprintf (file, _("\
	385	--stub-group-size=N Maximum size of a group of input sections that can be\n\
	386	handled by one stub section. A negative value\n\
	387	locates all stubs after their branches (with a\n\
	388	group size of -N), while a positive value allows\n\
	389	two groups of input sections, one before, and one\n\
	390	after each stub section. Values of +/-1 indicate\n\
	391	the linker should choose suitable defaults.\n"
	392	));
68fcca92	393	fprintf (file, _(" --fix-cortex-a53-835769 Fix erratum 835769\n"));
4106101c	394	fprintf (file, _(" --fix-cortex-a53-843419 Fix erratum 843419\n"));
1f56df9d	395	fprintf (file, _(" --no-apply-dynamic-relocs Do not apply link-time values for dynamic relocations\n"));
a06ea964 NC	396	'
	397
	398	PARSE_AND_LIST_ARGS_CASES='
	399	case '\'p\'':
	400	/* Only here for backwards compatibility. */
	401	break;
	402
	403	case OPTION_NO_ENUM_SIZE_WARNING:
	404	no_enum_size_warning = 1;
	405	break;
	406
	407	case OPTION_NO_WCHAR_SIZE_WARNING:
	408	no_wchar_size_warning = 1;
	409	break;
	410
	411	case OPTION_PIC_VENEER:
	412	pic_veneer = 1;
	413	break;
	414
68fcca92 JW	415	case OPTION_FIX_ERRATUM_835769:
	416	fix_erratum_835769 = 1;
	417	break;
	418
4106101c MS	419	case OPTION_FIX_ERRATUM_843419:
	420	fix_erratum_843419 = 1;
	421	break;
	422
1f56df9d JW	423	case OPTION_NO_APPLY_DYNAMIC_RELOCS:
	424	no_apply_dynamic_relocs = 1;
	425	break;
	426
a06ea964 NC	427	case OPTION_STUBGROUP_SIZE:
	428	{
	429	const char *end;
	430
	431	group_size = bfd_scan_vma (optarg, &end, 0);
	432	if (*end)
	433	einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
	434	}
	435	break;
	436	'
	437
	438	# We have our own before_allocation etc. functions, but they call
	439	# the standard routines, so give them a different name.
	440	LDEMUL_BEFORE_ALLOCATION=aarch64_elf_before_allocation
	441	LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
	442	LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=aarch64_elf_create_output_section_statements
	443
	444	# Replace the elf before_parse function with our own.
	445	LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
	446
	447	# Call the extra arm-elf function
	448	LDEMUL_FINISH=gld${EMULATION_NAME}_finish