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

# This shell script emits a C file. -*- C -*-
#   Copyright (C) 1991, 93, 94, 95, 97, 99, 2000
#   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_set_output_arch PARAMS ((void));
static void hppaelf_create_output_section_statements PARAMS ((void));
static void hppaelf_delete_padding_statements
  PARAMS ((lang_statement_list_type *));
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;


/* Set the output architecture and machine.  */

static void
hppaelf_set_output_arch ()
{
  unsigned long machine = 0;

  bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine);
}

/* 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);
}

/* Walk all the lang statements splicing out any padding statements from
   the list.  */

static void
hppaelf_delete_padding_statements (list)
     lang_statement_list_type *list;
{
  lang_statement_union_type *s;
  lang_statement_union_type **ps;
  for (ps = &list->head; (s = *ps) != NULL; ps = &s->next)
    {
      switch (s->header.type)
	{

	/* We want to recursively walk these sections.  */
	case lang_constructors_statement_enum:
	  hppaelf_delete_padding_statements (&constructor_list);
	  break;

	case lang_output_section_statement_enum:
	  hppaelf_delete_padding_statements (&s->output_section_statement.children);
	  break;

	case lang_group_statement_enum:
	  hppaelf_delete_padding_statements (&s->group_statement.children);
	  break;

	case lang_wild_statement_enum:
	  hppaelf_delete_padding_statements (&s->wild_statement.children);
	  break;

	/* Here's what we are really looking for.  Splice these out of
	   the list.  */
	case lang_padding_statement_enum:
	  *ps = s->next;
	  if (*ps == NULL)
	    list->tail = ps;
	  break;

	/* We don't care about these cases.  */
	case lang_data_statement_enum:
	case lang_object_symbols_statement_enum:
	case lang_output_statement_enum:
	case lang_target_statement_enum:
	case lang_input_section_enum:
	case lang_input_statement_enum:
	case lang_assignment_statement_enum:
	case lang_address_statement_enum:
	  break;

	default:
	  abort ();
	  break;
	}
    }
}


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_name, input_section)
     const char *stub_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_name);
  if (stub_sec == NULL)
    goto err_ret;

  flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
	   | SEC_HAS_CONTENTS | 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);
  wild_doit (&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.  */

  /* Delete all the padding statements, they're no longer valid.  */
  hppaelf_delete_padding_statements (stat_ptr);

  /* 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 relocateable 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 (stub_file->the_bfd,
			       &link_info,
			       &hppaelf_add_stub_section,
			       &hppaelf_layaout_sections_again))
    {
      einfo ("%X%P: can not size stub section: %E\n");
      return;
    }

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

EOF

# Put these routines in ld_${EMULATION_NAME}_emulation
#
LDEMUL_SET_OUTPUT_ARCH=hppaelf_set_output_arch
LDEMUL_FINISH=hppaelf_finish
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements
Commit	Line	Data
252b5132	1	# This shell script emits a C file. -- C --
41392f03 AM	2	# Copyright (C) 1991, 93, 94, 95, 97, 99, 2000
	3	# Free Software Foundation, Inc.
	4	#
	5	# This file is part of GLD, the Gnu Linker.
	6	#
	7	# This program is free software; you can redistribute it and/or modify
	8	# it under the terms of the GNU General Public License as published by
	9	# the Free Software Foundation; either version 2 of the License, or
	10	# (at your option) any later version.
	11	#
	12	# This program is distributed in the hope that it will be useful,
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	# GNU General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; if not, write to the Free Software
	19	# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	20	#
	21
	22	# This file is sourced from elf32.em, and defines extra hppa-elf
	23	# specific routines.
	24	#
	25	cat >>e${EMULATION_NAME}.c <<EOF
	26
252b5132	27	#include "ldctor.h"
4900fc06	28	#include "elf32-hppa.h"
252b5132	29
4900fc06 AM	30	static void hppaelf_set_output_arch PARAMS ((void));
	31	static void hppaelf_create_output_section_statements PARAMS ((void));
	32	static void hppaelf_delete_padding_statements
41392f03 AM	33	PARAMS ((lang_statement_list_type *));
	34	static asection *hppaelf_add_stub_section
	35	PARAMS ((const char , asection ));
	36	static void hppaelf_layaout_sections_again PARAMS ((void));
4900fc06	37	static void hppaelf_finish PARAMS ((void));
252b5132 RH	38
252b5132 RH	39
4900fc06 AM	40	/* Fake input file for stubs. */
4900fc06 AM	41	static lang_input_statement_type *stub_file;
252b5132	42
252b5132 RH	43
	44	/* Set the output architecture and machine. */
	45
	46	static void
41392f03	47	hppaelf_set_output_arch ()
252b5132 RH	48	{
	49	unsigned long machine = 0;
	50
	51	bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine);
	52	}
	53
	54	/* This is called before the input files are opened. We create a new
4900fc06	55	fake input file to hold the stub sections. */
252b5132 RH	56
	57	static void
	58	hppaelf_create_output_section_statements ()
	59	{
	60	stub_file = lang_add_input_file ("linker stubs",
	61	lang_input_file_is_fake_enum,
	62	NULL);
	63	stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
	64	if (stub_file->the_bfd == NULL
	65	\|\| ! bfd_set_arch_mach (stub_file->the_bfd,
	66	bfd_get_arch (output_bfd),
	67	bfd_get_mach (output_bfd)))
	68	{
	69	einfo ("%X%P: can not create BFD %E\n");
	70	return;
	71	}
	72
252b5132 RH	73	ldlang_add_file (stub_file);
	74	}
	75
4900fc06	76	/* Walk all the lang statements splicing out any padding statements from
252b5132 RH	77	the list. */
	78
	79	static void
4900fc06 AM	80	hppaelf_delete_padding_statements (list)
4900fc06 AM	81	lang_statement_list_type *list;
252b5132	82	{
4900fc06 AM	83	lang_statement_union_type *s;
	84	lang_statement_union_type **ps;
	85	for (ps = &list->head; (s = *ps) != NULL; ps = &s->next)
252b5132 RH	86	{
	87	switch (s->header.type)
	88	{
	89
4900fc06	90	/* We want to recursively walk these sections. */
252b5132	91	case lang_constructors_statement_enum:
4900fc06	92	hppaelf_delete_padding_statements (&constructor_list);
252b5132 RH	93	break;
	94
	95	case lang_output_section_statement_enum:
4900fc06 AM	96	hppaelf_delete_padding_statements (&s->output_section_statement.children);
	97	break;
	98
	99	case lang_group_statement_enum:
	100	hppaelf_delete_padding_statements (&s->group_statement.children);
252b5132 RH	101	break;
252b5132 RH	102
252b5132	103	case lang_wild_statement_enum:
4900fc06	104	hppaelf_delete_padding_statements (&s->wild_statement.children);
252b5132 RH	105	break;
	106
	107	/* Here's what we are really looking for. Splice these out of
	108	the list. */
	109	case lang_padding_statement_enum:
4900fc06 AM	110	*ps = s->next;
	111	if (*ps == NULL)
	112	list->tail = ps;
252b5132 RH	113	break;
	114
	115	/* We don't care about these cases. */
	116	case lang_data_statement_enum:
	117	case lang_object_symbols_statement_enum:
	118	case lang_output_statement_enum:
	119	case lang_target_statement_enum:
	120	case lang_input_section_enum:
	121	case lang_input_statement_enum:
	122	case lang_assignment_statement_enum:
	123	case lang_address_statement_enum:
	124	break;
	125
	126	default:
	127	abort ();
	128	break;
	129	}
252b5132 RH	130	}
	131	}
	132
4900fc06 AM	133
	134	struct hook_stub_info
	135	{
	136	lang_statement_list_type add;
	137	asection *input_section;
	138	};
	139
	140	/* Traverse the linker tree to find the spot where the stub goes. */
	141
41392f03 AM	142	static boolean hook_in_stub
	143	PARAMS ((struct hook_stub_info , lang_statement_union_type *));
	144
4900fc06 AM	145	static boolean
	146	hook_in_stub (info, lp)
	147	struct hook_stub_info *info;
	148	lang_statement_union_type **lp;
	149	{
	150	lang_statement_union_type *l;
	151	boolean ret;
	152
	153	for (; (l = *lp) != NULL; lp = &l->next)
	154	{
	155	switch (l->header.type)
	156	{
	157	case lang_constructors_statement_enum:
	158	ret = hook_in_stub (info, &constructor_list.head);
	159	if (ret)
	160	return ret;
	161	break;
	162
	163	case lang_output_section_statement_enum:
	164	ret = hook_in_stub (info,
	165	&l->output_section_statement.children.head);
	166	if (ret)
	167	return ret;
	168	break;
	169
	170	case lang_wild_statement_enum:
	171	ret = hook_in_stub (info, &l->wild_statement.children.head);
	172	if (ret)
	173	return ret;
	174	break;
	175
	176	case lang_group_statement_enum:
	177	ret = hook_in_stub (info, &l->group_statement.children.head);
	178	if (ret)
	179	return ret;
	180	break;
	181
	182	case lang_input_section_enum:
	183	if (l->input_section.section == info->input_section)
	184	{
	185	/* We've found our section. Insert the stub immediately
	186	before its associated input section. */
	187	*lp = info->add.head;
	188	*(info->add.tail) = l;
	189	return true;
	190	}
	191	break;
	192
	193	case lang_data_statement_enum:
	194	case lang_reloc_statement_enum:
	195	case lang_object_symbols_statement_enum:
	196	case lang_output_statement_enum:
	197	case lang_target_statement_enum:
	198	case lang_input_statement_enum:
	199	case lang_assignment_statement_enum:
	200	case lang_padding_statement_enum:
	201	case lang_address_statement_enum:
	202	case lang_fill_statement_enum:
	203	break;
	204
	205	default:
	206	FAIL ();
	207	break;
	208	}
209	}
210	return false;
211	}
212
41392f03	213
4900fc06 AM	214	/* Call-back for elf32_hppa_size_stubs. */
	215
	216	/* Create a new stub section, and arrange for it to be linked
	217	immediately before INPUT_SECTION. */
	218
	219	static asection *
	220	hppaelf_add_stub_section (stub_name, input_section)
	221	const char *stub_name;
	222	asection *input_section;
	223	{
	224	asection *stub_sec;
	225	flagword flags;
	226	asection *output_section;
	227	const char *secname;
	228	lang_output_section_statement_type *os;
	229	struct hook_stub_info info;
	230
	231	stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_name);
	232	if (stub_sec == NULL)
	233	goto err_ret;
	234
	235	flags = (SEC_ALLOC \| SEC_LOAD \| SEC_READONLY \| SEC_CODE
	236	\| SEC_HAS_CONTENTS \| SEC_IN_MEMORY \| SEC_KEEP);
	237	if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
	238	goto err_ret;
	239
	240	output_section = input_section->output_section;
	241	secname = bfd_get_section_name (output_section->owner, output_section);
	242	os = lang_output_section_find (secname);
	243
	244	info.input_section = input_section;
	245	lang_list_init (&info.add);
	246	wild_doit (&info.add, stub_sec, os, stub_file);
	247
	248	if (info.add.head == NULL)
	249	goto err_ret;
	250
	251	if (hook_in_stub (&info, &os->children.head))
	252	return stub_sec;
	253
	254	err_ret:
	255	einfo ("%X%P: can not make stub section: %E\n");
	256	return NULL;
	257	}
	258
41392f03	259
4900fc06 AM	260	/* Another call-back for elf32_hppa_size_stubs. */
	261
	262	static void
	263	hppaelf_layaout_sections_again ()
	264	{
	265	/* If we have changed sizes of the stub sections, then we need
	266	to recalculate all the section offsets. This may mean we need to
	267	add even more stubs. */
	268
	269	/* Delete all the padding statements, they're no longer valid. */
	270	hppaelf_delete_padding_statements (stat_ptr);
	271
	272	/* Resize the sections. */
	273	lang_size_sections (stat_ptr->head, abs_output_section,
	274	&stat_ptr->head, 0, (bfd_vma) 0, false);
	275
	276	/* Redo special stuff. */
	277	ldemul_after_allocation ();
	278
	279	/* Do the assignments again. */
	280	lang_do_assignments (stat_ptr->head, abs_output_section,
	281	(fill_type) 0, (bfd_vma) 0);
	282	}
	283
	284
252b5132 RH	285	/* Final emulation specific call. For the PA we use this opportunity
	286	to build linker stubs. */
	287
	288	static void
	289	hppaelf_finish ()
	290	{
4900fc06 AM	291	/* If generating a relocateable output file, then we don't
	292	have to examine the relocs. */
	293	if (link_info.relocateable)
	294	return;
	295
252b5132	296	/* Call into the BFD backend to do the real work. */
41392f03 AM	297	if (! elf32_hppa_size_stubs (stub_file->the_bfd,
	298	&link_info,
	299	&hppaelf_add_stub_section,
	300	&hppaelf_layaout_sections_again))
252b5132 RH	301	{
	302	einfo ("%X%P: can not size stub section: %E\n");
	303	return;
	304	}
4900fc06 AM	305
	306	/* Now build the linker stubs. */
	307	if (stub_file->the_bfd->sections != NULL)
252b5132	308	{
41392f03	309	if (! elf32_hppa_build_stubs (stub_file->the_bfd, &link_info))
4900fc06 AM	310	einfo ("%X%P: can not build stubs: %E\n");
	311	}
	312	}
	313
252b5132 RH	314	EOF
252b5132 RH	315
41392f03 AM	316	# Put these routines in ld_${EMULATION_NAME}_emulation
	317	#
	318	LDEMUL_SET_OUTPUT_ARCH=hppaelf_set_output_arch
	319	LDEMUL_FINISH=hppaelf_finish
	320	LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements