[deliverable/binutils-gdb.git] / ld / emultempl / m68kelf.em

# This shell script emits a C file. -*- C -*-
#   Copyright 2000, 2001, 2003, 2007 Free Software Foundation, Inc.
#   Written by Michael Sokolov <msokolov@ivan.Harhan.ORG>, based on armelf.em
#
# 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; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
# MA 02110-1301, USA.


# This file is sourced from elf32.em, and defines some extra routines for m68k
# embedded systems using ELF and for some other systems using m68k ELF.  While
# it is sourced from elf32.em for all m68k ELF configurations, here we include
# only the features we want depending on the configuration.

case ${target} in
  m68*-*-elf)
    echo "#define SUPPORT_EMBEDDED_RELOCS" >>e${EMULATION_NAME}.c
    ;;
esac

fragment <<EOF

#ifdef SUPPORT_EMBEDDED_RELOCS
static void check_sections (bfd *, asection *, void *);
#endif

/* This function is run after all the input files have been opened.  */

static void
m68k_elf_after_open (void)
{
  /* Call the standard elf routine.  */
  gld${EMULATION_NAME}_after_open ();

#ifdef SUPPORT_EMBEDDED_RELOCS
  if (command_line.embedded_relocs
      && (! link_info.relocatable))
    {
      bfd *abfd;

      /* In the embedded relocs mode we create a .emreloc section for each
	 input file with a nonzero .data section.  The BFD backend will fill in
	 these sections with magic numbers which can be used to relocate the
	 data section at run time.  */
      for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
	{
	  asection *datasec;

	  /* As first-order business, make sure that each input BFD is either
	     COFF or ELF.  We need to call a special BFD backend function to
	     generate the embedded relocs, and we have such functions only for
	     COFF and ELF.  */
	  if (bfd_get_flavour (abfd) != bfd_target_coff_flavour
	      && bfd_get_flavour (abfd) != bfd_target_elf_flavour)
	    einfo ("%F%B: all input objects must be COFF or ELF for --embedded-relocs\n");

	  datasec = bfd_get_section_by_name (abfd, ".data");

	  /* Note that we assume that the reloc_count field has already
	     been set up.  We could call bfd_get_reloc_upper_bound, but
	     that returns the size of a memory buffer rather than a reloc
	     count.  We do not want to call bfd_canonicalize_reloc,
	     because although it would always work it would force us to
	     read in the relocs into BFD canonical form, which would waste
	     a significant amount of time and memory.  */
	  if (datasec != NULL && datasec->reloc_count > 0)
	    {
	      asection *relsec;

	      relsec = bfd_make_section (abfd, ".emreloc");
	      if (relsec == NULL
		  || ! bfd_set_section_flags (abfd, relsec,
					      (SEC_ALLOC
					       | SEC_LOAD
					       | SEC_HAS_CONTENTS
					       | SEC_IN_MEMORY))
		  || ! bfd_set_section_alignment (abfd, relsec, 2)
		  || ! bfd_set_section_size (abfd, relsec,
					     datasec->reloc_count * 12))
		einfo ("%F%B: can not create .emreloc section: %E\n");
	    }

	  /* Double check that all other data sections are empty, as is
	     required for embedded PIC code.  */
	  bfd_map_over_sections (abfd, check_sections, datasec);
	}
    }
#endif /* SUPPORT_EMBEDDED_RELOCS */
}

#ifdef SUPPORT_EMBEDDED_RELOCS
/* Check that of the data sections, only the .data section has
   relocs.  This is called via bfd_map_over_sections.  */

static void
check_sections (bfd *abfd, asection *sec, void *datasec)
{
  if ((bfd_get_section_flags (abfd, sec) & SEC_DATA)
      && sec != datasec
      && sec->reloc_count != 0)
    einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n",
	   abfd, bfd_get_section_name (abfd, sec));
}

#endif /* SUPPORT_EMBEDDED_RELOCS */

/* This function is called after the section sizes and offsets have
   been set.  */

static void
m68k_elf_after_allocation (void)
{
  /* Call the standard elf routine.  */
  after_allocation_default ();

#ifdef SUPPORT_EMBEDDED_RELOCS
  if (command_line.embedded_relocs
      && (! link_info.relocatable))
    {
      bfd *abfd;

      /* If we are generating embedded relocs, call a special BFD backend
	 routine to do the work.  */
      for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
	{
	  asection *datasec, *relsec;
	  char *errmsg;

	  datasec = bfd_get_section_by_name (abfd, ".data");

	  if (datasec == NULL || datasec->reloc_count == 0)
	    continue;

	  relsec = bfd_get_section_by_name (abfd, ".emreloc");
	  ASSERT (relsec != NULL);

	  if (bfd_get_flavour (abfd) == bfd_target_coff_flavour)
	    {
	      if (! bfd_m68k_coff_create_embedded_relocs (abfd, &link_info,
							  datasec, relsec,
							  &errmsg))
		{
		  if (errmsg == NULL)
		    einfo ("%B%X: can not create runtime reloc information: %E\n",
			   abfd);
		  else
		    einfo ("%X%B: can not create runtime reloc information: %s\n",
			   abfd, errmsg);
		}
	    }
	  else if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
	    {
	      if (! bfd_m68k_elf32_create_embedded_relocs (abfd, &link_info,
							   datasec, relsec,
							   &errmsg))
		{
		  if (errmsg == NULL)
		    einfo ("%B%X: can not create runtime reloc information: %E\n",
			   abfd);
		  else
		    einfo ("%X%B: can not create runtime reloc information: %s\n",
			   abfd, errmsg);
		}
	    }
	  else
	    abort ();
	}
    }
#endif /* SUPPORT_EMBEDDED_RELOCS */
}

EOF

# We have our own after_open and after_allocation functions, but they call
# the standard routines, so give them a different name.
LDEMUL_AFTER_OPEN=m68k_elf_after_open
LDEMUL_AFTER_ALLOCATION=m68k_elf_after_allocation
Commit	Line	Data
0752970e	1	# This shell script emits a C file. -- C --
f96b4a7b	2	# Copyright 2000, 2001, 2003, 2007 Free Software Foundation, Inc.
0752970e NC	3	# Written by Michael Sokolov <msokolov@ivan.Harhan.ORG>, based on armelf.em
0752970e NC	4	#
f96b4a7b	5	# This file is part of the GNU Binutils.
0752970e NC	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
f96b4a7b	9	# the Free Software Foundation; either version 3 of the License, or
0752970e NC	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
f96b4a7b NC	19	# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
	20	# MA 02110-1301, USA.
	21
0752970e	22
36bdbeec NC	23	# This file is sourced from elf32.em, and defines some extra routines for m68k
	24	# embedded systems using ELF and for some other systems using m68k ELF. While
	25	# it is sourced from elf32.em for all m68k ELF configurations, here we include
	26	# only the features we want depending on the configuration.
	27
	28	case ${target} in
	29	m68--elf)
	30	echo "#define SUPPORT_EMBEDDED_RELOCS" >>e${EMULATION_NAME}.c
	31	;;
	32	esac
	33
92b93329	34	fragment <<EOF
0752970e	35
36bdbeec	36	#ifdef SUPPORT_EMBEDDED_RELOCS
0c7a8e5a	37	static void check_sections (bfd , asection , void *);
36bdbeec	38	#endif
0752970e	39
36bdbeec	40	/* This function is run after all the input files have been opened. */
0752970e NC	41
0752970e NC	42	static void
0c7a8e5a	43	m68k_elf_after_open (void)
0752970e	44	{
0752970e NC	45	/* Call the standard elf routine. */
	46	gld${EMULATION_NAME}_after_open ();
	47
36bdbeec NC	48	#ifdef SUPPORT_EMBEDDED_RELOCS
36bdbeec NC	49	if (command_line.embedded_relocs
1049f94e	50	&& (! link_info.relocatable))
0752970e	51	{
36bdbeec NC	52	bfd *abfd;
	53
	54	/* In the embedded relocs mode we create a .emreloc section for each
	55	input file with a nonzero .data section. The BFD backend will fill in
	56	these sections with magic numbers which can be used to relocate the
	57	data section at run time. */
	58	for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
0752970e	59	{
36bdbeec NC	60	asection *datasec;
	61
	62	/* As first-order business, make sure that each input BFD is either
	63	COFF or ELF. We need to call a special BFD backend function to
	64	generate the embedded relocs, and we have such functions only for
	65	COFF and ELF. */
	66	if (bfd_get_flavour (abfd) != bfd_target_coff_flavour
	67	&& bfd_get_flavour (abfd) != bfd_target_elf_flavour)
	68	einfo ("%F%B: all input objects must be COFF or ELF for --embedded-relocs\n");
	69
	70	datasec = bfd_get_section_by_name (abfd, ".data");
	71
	72	/* Note that we assume that the reloc_count field has already
	73	been set up. We could call bfd_get_reloc_upper_bound, but
	74	that returns the size of a memory buffer rather than a reloc
	75	count. We do not want to call bfd_canonicalize_reloc,
	76	because although it would always work it would force us to
	77	read in the relocs into BFD canonical form, which would waste
	78	a significant amount of time and memory. */
	79	if (datasec != NULL && datasec->reloc_count > 0)
	80	{
	81	asection *relsec;
	82
	83	relsec = bfd_make_section (abfd, ".emreloc");
	84	if (relsec == NULL
	85	\|\| ! bfd_set_section_flags (abfd, relsec,
	86	(SEC_ALLOC
	87	\| SEC_LOAD
	88	\| SEC_HAS_CONTENTS
	89	\| SEC_IN_MEMORY))
	90	\|\| ! bfd_set_section_alignment (abfd, relsec, 2)
	91	\|\| ! bfd_set_section_size (abfd, relsec,
	92	datasec->reloc_count * 12))
	93	einfo ("%F%B: can not create .emreloc section: %E\n");
	94	}
	95
	96	/* Double check that all other data sections are empty, as is
	97	required for embedded PIC code. */
1579bae1	98	bfd_map_over_sections (abfd, check_sections, datasec);
0752970e	99	}
0752970e	100	}
36bdbeec	101	#endif /* SUPPORT_EMBEDDED_RELOCS */
0752970e NC	102	}
0752970e NC	103
36bdbeec	104	#ifdef SUPPORT_EMBEDDED_RELOCS
0752970e NC	105	/* Check that of the data sections, only the .data section has
	106	relocs. This is called via bfd_map_over_sections. */
	107
	108	static void
1579bae1	109	check_sections (bfd abfd, asection sec, void *datasec)
0752970e NC	110	{
0752970e NC	111	if ((bfd_get_section_flags (abfd, sec) & SEC_DATA)
1579bae1	112	&& sec != datasec
0752970e NC	113	&& sec->reloc_count != 0)
	114	einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n",
	115	abfd, bfd_get_section_name (abfd, sec));
	116	}
	117
36bdbeec NC	118	#endif /* SUPPORT_EMBEDDED_RELOCS */
36bdbeec NC	119
0752970e	120	/* This function is called after the section sizes and offsets have
36bdbeec	121	been set. */
0752970e NC	122
0752970e NC	123	static void
0c7a8e5a	124	m68k_elf_after_allocation (void)
0752970e	125	{
0752970e	126	/* Call the standard elf routine. */
1c7566d1	127	after_allocation_default ();
0752970e	128
36bdbeec NC	129	#ifdef SUPPORT_EMBEDDED_RELOCS
36bdbeec NC	130	if (command_line.embedded_relocs
1049f94e	131	&& (! link_info.relocatable))
0752970e	132	{
36bdbeec	133	bfd *abfd;
0752970e	134
36bdbeec NC	135	/* If we are generating embedded relocs, call a special BFD backend
	136	routine to do the work. */
	137	for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
0752970e	138	{
36bdbeec NC	139	asection datasec, relsec;
	140	char *errmsg;
	141
	142	datasec = bfd_get_section_by_name (abfd, ".data");
	143
	144	if (datasec == NULL \|\| datasec->reloc_count == 0)
	145	continue;
	146
	147	relsec = bfd_get_section_by_name (abfd, ".emreloc");
	148	ASSERT (relsec != NULL);
	149
	150	if (bfd_get_flavour (abfd) == bfd_target_coff_flavour)
	151	{
	152	if (! bfd_m68k_coff_create_embedded_relocs (abfd, &link_info,
	153	datasec, relsec,
	154	&errmsg))
	155	{
	156	if (errmsg == NULL)
	157	einfo ("%B%X: can not create runtime reloc information: %E\n",
	158	abfd);
	159	else
	160	einfo ("%X%B: can not create runtime reloc information: %s\n",
	161	abfd, errmsg);
	162	}
	163	}
	164	else if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
	165	{
	166	if (! bfd_m68k_elf32_create_embedded_relocs (abfd, &link_info,
	167	datasec, relsec,
	168	&errmsg))
	169	{
	170	if (errmsg == NULL)
	171	einfo ("%B%X: can not create runtime reloc information: %E\n",
	172	abfd);
	173	else
	174	einfo ("%X%B: can not create runtime reloc information: %s\n",
	175	abfd, errmsg);
	176	}
	177	}
0752970e	178	else
36bdbeec	179	abort ();
0752970e NC	180	}
0752970e NC	181	}
36bdbeec	182	#endif /* SUPPORT_EMBEDDED_RELOCS */
0752970e NC	183	}
	184
	185	EOF
	186
	187	# We have our own after_open and after_allocation functions, but they call
	188	# the standard routines, so give them a different name.
	189	LDEMUL_AFTER_OPEN=m68k_elf_after_open
	190	LDEMUL_AFTER_ALLOCATION=m68k_elf_after_allocation