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

# This shell script emits a C file. -*- C -*-
#   Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001
#   Free Software Foundation, Inc.
#
# This file is part of GLD, the Gnu Linker.
#
# 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 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

# This file is sourced from elf32.em, and defines extra hppa-elf
# specific routines.
#
cat >>e${EMULATION_NAME}.c <<EOF

#include "ldctor.h"
#include "elf32-hppa.h"

static void hppaelf_after_parse PARAMS((void));
static void hppaelf_create_output_section_statements PARAMS ((void));
static asection *hppaelf_add_stub_section
  PARAMS ((const char *, asection *));
static void hppaelf_layaout_sections_again PARAMS ((void));
static void hppaelf_finish PARAMS ((void));


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

/* Type of import/export stubs to build.  For a single sub-space model,
   we can build smaller import stubs and there is no need for export
   stubs.  */
static int multi_subspace = 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;

/* Stops the linker merging .text sections on a relocatable link,
   and adds millicode library to the list of input files.  */

static void
hppaelf_after_parse ()
{
  if (link_info.relocateable)
    lang_add_unique (".text");
#if 0 /* enable this once we split millicode stuff from libgcc */
  else
    lang_add_input_file ("milli",
			 lang_input_file_is_l_enum,
			 NULL);
#endif
}

/* This is called before the input files are opened.  We create a new
   fake input file to hold the stub sections.  */

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

  ldlang_add_file (stub_file);
}


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 boolean hook_in_stub
  PARAMS ((struct hook_stub_info *, lang_statement_union_type **));

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

  for (; (l = *lp) != NULL; lp = &l->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
		 before its associated input section.  */
	      *lp = info->add.head;
	      *(info->add.tail) = l;
	      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 elf32_hppa_size_stubs.  */

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

static asection *
hppaelf_add_stub_section (stub_sec_name, input_section)
     const char *stub_sec_name;
     asection *input_section;
{
  asection *stub_sec;
  flagword flags;
  asection *output_section;
  const char *secname;
  lang_output_section_statement_type *os;
  struct hook_stub_info info;

  stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
  if (stub_sec == NULL)
    goto err_ret;

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

  output_section = input_section->output_section;
  secname = bfd_get_section_name (output_section->owner, output_section);
  os = lang_output_section_find (secname);

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

  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 elf32_hppa_size_stubs.  */

static void
hppaelf_layaout_sections_again ()
{
  /* 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.  */

  /* Resize the sections.  */
  lang_size_sections (stat_ptr->head, abs_output_section,
		      &stat_ptr->head, 0, (bfd_vma) 0, false);

  /* Redo special stuff.  */
  ldemul_after_allocation ();

  /* Do the assignments again.  */
  lang_do_assignments (stat_ptr->head, abs_output_section,
		       (fill_type) 0, (bfd_vma) 0);
}


/* Final emulation specific call.  For the PA we use this opportunity
   to build linker stubs.  */

static void
hppaelf_finish ()
{
  /* If generating a relocatable output file, then we don't
     have to examine the relocs.  */
  if (link_info.relocateable)
    return;

  /* Call into the BFD backend to do the real work.  */
  if (! elf32_hppa_size_stubs (output_bfd,
			       stub_file->the_bfd,
			       &link_info,
			       multi_subspace,
			       group_size,
			       &hppaelf_add_stub_section,
			       &hppaelf_layaout_sections_again))
    {
      einfo ("%X%P: can not size stub section: %E\n");
      return;
    }

  /* Set the global data pointer.  */
  if (! elf32_hppa_set_gp (output_bfd, &link_info))
    {
      einfo ("%X%P: can not set gp\n");
      return;
    }

  /* Now build the linker stubs.  */
  if (stub_file->the_bfd->sections != NULL)
    {
      if (! elf32_hppa_build_stubs (&link_info))
	einfo ("%X%P: can not build stubs: %E\n");
    }
}


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

static void hppa_for_each_input_file_wrapper
  PARAMS ((lang_input_statement_type *));
static void hppa_lang_for_each_input_file
  PARAMS ((void (*) (lang_input_statement_type *)));

static void (*real_func) PARAMS ((lang_input_statement_type *));

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

static void
hppa_lang_for_each_input_file (func)
     void (*func) PARAMS ((lang_input_statement_type *));
{
  real_func = func;
  lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
}

#define lang_for_each_input_file hppa_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_MULTI_SUBSPACE		301
#define OPTION_STUBGROUP_SIZE		(OPTION_MULTI_SUBSPACE + 1)
'

# The options are repeated below so that no abbreviations are allowed.
# Otherwise -s matches stub-group-size
PARSE_AND_LIST_LONGOPTS='
  { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
  { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
  { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
  { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
'

PARSE_AND_LIST_OPTIONS='
  fprintf (file, _("\
  --multi-subspace    Generate import and export stubs to support\n\
                        multiple sub-space shared libraries\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 before 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."
		   ));
'

PARSE_AND_LIST_ARGS_CASES='
    case OPTION_MULTI_SUBSPACE:
      multi_subspace = 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;
'

# Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
#
LDEMUL_AFTER_PARSE=hppaelf_after_parse
LDEMUL_FINISH=hppaelf_finish
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements
Commit	Line	Data
252b5132	1	# This shell script emits a C file. -- C --
a2b64bed	2	# Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001
41392f03 AM	3	# Free Software Foundation, Inc.
	4	#
	5	# This file is part of GLD, the Gnu Linker.
	6	#
	7	# This program is free software; you can redistribute it and/or modify
	8	# it under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 2 of the License, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful,
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	# GNU General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; if not, write to the Free Software
	19	# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	20	#
	21
	22	# This file is sourced from elf32.em, and defines extra hppa-elf
	23	# specific routines.
	24	#
	25	cat >>e${EMULATION_NAME}.c <<EOF
	26
252b5132	27	#include "ldctor.h"
4900fc06	28	#include "elf32-hppa.h"
252b5132	29
ffd6e9de	30	static void hppaelf_after_parse PARAMS((void));
4900fc06	31	static void hppaelf_create_output_section_statements PARAMS ((void));
41392f03 AM	32	static asection *hppaelf_add_stub_section
	33	PARAMS ((const char , asection ));
	34	static void hppaelf_layaout_sections_again PARAMS ((void));
4900fc06	35	static void hppaelf_finish PARAMS ((void));
252b5132 RH	36
252b5132 RH	37
4900fc06 AM	38	/* Fake input file for stubs. */
4900fc06 AM	39	static lang_input_statement_type *stub_file;
252b5132	40
3231d22e AM	41	/* Type of import/export stubs to build. For a single sub-space model,
	42	we can build smaller import stubs and there is no need for export
	43	stubs. */
	44	static int multi_subspace = 0;
252b5132	45
47d89dba AM	46	/* Maximum size of a group of input sections that can be handled by
	47	one stub section. A value of +/-1 indicates the bfd back-end
	48	should use a suitable default size. */
	49	static bfd_signed_vma group_size = 1;
252b5132	50
ffd6e9de AM	51	/* Stops the linker merging .text sections on a relocatable link,
	52	and adds millicode library to the list of input files. */
	53
	54	static void
	55	hppaelf_after_parse ()
	56	{
	57	if (link_info.relocateable)
	58	lang_add_unique (".text");
	59	#if 0 /* enable this once we split millicode stuff from libgcc */
	60	else
	61	lang_add_input_file ("milli",
	62	lang_input_file_is_l_enum,
	63	NULL);
	64	#endif
	65	}
	66
252b5132	67	/* This is called before the input files are opened. We create a new
4900fc06	68	fake input file to hold the stub sections. */
252b5132 RH	69
	70	static void
	71	hppaelf_create_output_section_statements ()
	72	{
	73	stub_file = lang_add_input_file ("linker stubs",
	74	lang_input_file_is_fake_enum,
	75	NULL);
	76	stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
	77	if (stub_file->the_bfd == NULL
	78	\|\| ! bfd_set_arch_mach (stub_file->the_bfd,
	79	bfd_get_arch (output_bfd),
	80	bfd_get_mach (output_bfd)))
	81	{
	82	einfo ("%X%P: can not create BFD %E\n");
	83	return;
	84	}
	85
252b5132 RH	86	ldlang_add_file (stub_file);
	87	}
	88
4900fc06 AM	89
	90	struct hook_stub_info
	91	{
	92	lang_statement_list_type add;
	93	asection *input_section;
	94	};
	95
	96	/* Traverse the linker tree to find the spot where the stub goes. */
	97
41392f03 AM	98	static boolean hook_in_stub
	99	PARAMS ((struct hook_stub_info , lang_statement_union_type *));
	100
4900fc06 AM	101	static boolean
	102	hook_in_stub (info, lp)
	103	struct hook_stub_info *info;
	104	lang_statement_union_type **lp;
	105	{
	106	lang_statement_union_type *l;
	107	boolean ret;
	108
	109	for (; (l = *lp) != NULL; lp = &l->next)
	110	{
	111	switch (l->header.type)
	112	{
	113	case lang_constructors_statement_enum:
	114	ret = hook_in_stub (info, &constructor_list.head);
	115	if (ret)
	116	return ret;
	117	break;
	118
	119	case lang_output_section_statement_enum:
	120	ret = hook_in_stub (info,
	121	&l->output_section_statement.children.head);
	122	if (ret)
	123	return ret;
	124	break;
	125
	126	case lang_wild_statement_enum:
	127	ret = hook_in_stub (info, &l->wild_statement.children.head);
	128	if (ret)
	129	return ret;
	130	break;
	131
	132	case lang_group_statement_enum:
	133	ret = hook_in_stub (info, &l->group_statement.children.head);
	134	if (ret)
	135	return ret;
	136	break;
	137
	138	case lang_input_section_enum:
	139	if (l->input_section.section == info->input_section)
	140	{
	141	/* We've found our section. Insert the stub immediately
	142	before its associated input section. */
	143	*lp = info->add.head;
	144	*(info->add.tail) = l;
	145	return true;
	146	}
	147	break;
	148
	149	case lang_data_statement_enum:
	150	case lang_reloc_statement_enum:
	151	case lang_object_symbols_statement_enum:
	152	case lang_output_statement_enum:
	153	case lang_target_statement_enum:
	154	case lang_input_statement_enum:
	155	case lang_assignment_statement_enum:
	156	case lang_padding_statement_enum:
	157	case lang_address_statement_enum:
	158	case lang_fill_statement_enum:
	159	break;
	160
	161	default:
	162	FAIL ();
	163	break;
	164	}
165	}
166	return false;
167	}
168
41392f03	169
4900fc06 AM	170	/* Call-back for elf32_hppa_size_stubs. */
	171
	172	/* Create a new stub section, and arrange for it to be linked
	173	immediately before INPUT_SECTION. */
	174
	175	static asection *
25f72752 AM	176	hppaelf_add_stub_section (stub_sec_name, input_section)
25f72752 AM	177	const char *stub_sec_name;
4900fc06 AM	178	asection *input_section;
	179	{
	180	asection *stub_sec;
	181	flagword flags;
	182	asection *output_section;
	183	const char *secname;
	184	lang_output_section_statement_type *os;
	185	struct hook_stub_info info;
	186
25f72752	187	stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
4900fc06 AM	188	if (stub_sec == NULL)
	189	goto err_ret;
	190
	191	flags = (SEC_ALLOC \| SEC_LOAD \| SEC_READONLY \| SEC_CODE
3231d22e	192	\| SEC_HAS_CONTENTS \| SEC_RELOC \| SEC_IN_MEMORY \| SEC_KEEP);
4900fc06 AM	193	if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
	194	goto err_ret;
	195
	196	output_section = input_section->output_section;
	197	secname = bfd_get_section_name (output_section->owner, output_section);
	198	os = lang_output_section_find (secname);
	199
	200	info.input_section = input_section;
	201	lang_list_init (&info.add);
39dcfe18	202	lang_add_section (&info.add, stub_sec, os, stub_file);
4900fc06 AM	203
	204	if (info.add.head == NULL)
	205	goto err_ret;
	206
	207	if (hook_in_stub (&info, &os->children.head))
	208	return stub_sec;
	209
	210	err_ret:
	211	einfo ("%X%P: can not make stub section: %E\n");
	212	return NULL;
	213	}
	214
41392f03	215
4900fc06 AM	216	/* Another call-back for elf32_hppa_size_stubs. */
	217
	218	static void
	219	hppaelf_layaout_sections_again ()
	220	{
	221	/* If we have changed sizes of the stub sections, then we need
	222	to recalculate all the section offsets. This may mean we need to
	223	add even more stubs. */
	224
4900fc06 AM	225	/* Resize the sections. */
	226	lang_size_sections (stat_ptr->head, abs_output_section,
	227	&stat_ptr->head, 0, (bfd_vma) 0, false);
	228
	229	/* Redo special stuff. */
	230	ldemul_after_allocation ();
	231
	232	/* Do the assignments again. */
	233	lang_do_assignments (stat_ptr->head, abs_output_section,
	234	(fill_type) 0, (bfd_vma) 0);
	235	}
	236
	237
252b5132 RH	238	/* Final emulation specific call. For the PA we use this opportunity
	239	to build linker stubs. */
	240
	241	static void
	242	hppaelf_finish ()
	243	{
ffd6e9de	244	/* If generating a relocatable output file, then we don't
4900fc06 AM	245	have to examine the relocs. */
	246	if (link_info.relocateable)
	247	return;
	248
252b5132	249	/* Call into the BFD backend to do the real work. */
25f72752 AM	250	if (! elf32_hppa_size_stubs (output_bfd,
25f72752 AM	251	stub_file->the_bfd,
41392f03	252	&link_info,
25f72752	253	multi_subspace,
47d89dba	254	group_size,
41392f03 AM	255	&hppaelf_add_stub_section,
41392f03 AM	256	&hppaelf_layaout_sections_again))
252b5132 RH	257	{
	258	einfo ("%X%P: can not size stub section: %E\n");
	259	return;
	260	}
4900fc06	261
3231d22e AM	262	/* Set the global data pointer. */
	263	if (! elf32_hppa_set_gp (output_bfd, &link_info))
	264	{
	265	einfo ("%X%P: can not set gp\n");
	266	return;
	267	}
	268
4900fc06 AM	269	/* Now build the linker stubs. */
4900fc06 AM	270	if (stub_file->the_bfd->sections != NULL)
252b5132	271	{
3231d22e	272	if (! elf32_hppa_build_stubs (&link_info))
4900fc06 AM	273	einfo ("%X%P: can not build stubs: %E\n");
	274	}
	275	}
	276
3231d22e AM	277
	278	/* Avoid processing the fake stub_file in vercheck, stat_needed and
	279	check_needed routines. */
	280
	281	static void hppa_for_each_input_file_wrapper
	282	PARAMS ((lang_input_statement_type *));
	283	static void hppa_lang_for_each_input_file
	284	PARAMS ((void () (lang_input_statement_type )));
	285
	286	static void (real_func) PARAMS ((lang_input_statement_type ));
	287
	288	static void hppa_for_each_input_file_wrapper (l)
	289	lang_input_statement_type *l;
	290	{
	291	if (l != stub_file)
	292	(*real_func) (l);
	293	}
	294
	295	static void
	296	hppa_lang_for_each_input_file (func)
	297	void (func) PARAMS ((lang_input_statement_type ));
	298	{
	299	real_func = func;
	300	lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
	301	}
	302
	303	#define lang_for_each_input_file hppa_lang_for_each_input_file
	304
252b5132 RH	305	EOF
252b5132 RH	306
3231d22e AM	307	# Define some shell vars to insert bits of code into the standard elf
	308	# parse_args and list_options functions.
	309	#
	310	PARSE_AND_LIST_PROLOGUE='
	311	#define OPTION_MULTI_SUBSPACE 301
47d89dba	312	#define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
3231d22e AM	313	'
3231d22e AM	314
47d89dba AM	315	# The options are repeated below so that no abbreviations are allowed.
47d89dba AM	316	# Otherwise -s matches stub-group-size
3231d22e	317	PARSE_AND_LIST_LONGOPTS='
47d89dba AM	318	{ "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
	319	{ "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
	320	{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
	321	{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
3231d22e AM	322	'
	323
	324	PARSE_AND_LIST_OPTIONS='
	325	fprintf (file, _("\
47d89dba AM	326	--multi-subspace Generate import and export stubs to support\n\
	327	multiple sub-space shared libraries\n"
	328	));
	329	fprintf (file, _("\
	330	--stub-group-size=N Maximum size of a group of input sections that can be\n\
	331	handled by one stub section. A negative value\n\
	332	locates all stubs before their branches (with a\n\
	333	group size of -N), while a positive value allows\n\
	334	two groups of input sections, one before, and one\n\
	335	after each stub section. Values of +/-1 indicate\n\
	336	the linker should choose suitable defaults."
3231d22e AM	337	));
	338	'
	339
	340	PARSE_AND_LIST_ARGS_CASES='
	341	case OPTION_MULTI_SUBSPACE:
	342	multi_subspace = 1;
	343	break;
47d89dba AM	344
	345	case OPTION_STUBGROUP_SIZE:
	346	{
	347	const char *end;
	348	group_size = bfd_scan_vma (optarg, &end, 0);
	349	if (*end)
	350	einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
	351	}
	352	break;
3231d22e AM	353	'
	354
	355	# Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
41392f03	356	#
ffd6e9de	357	LDEMUL_AFTER_PARSE=hppaelf_after_parse
41392f03 AM	358	LDEMUL_FINISH=hppaelf_finish
41392f03 AM	359	LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements