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Conditionalise the embedded relocs feature on the m68*-*-elf target

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This commit is contained in:
Nick Clifton 2000-09-22 00:41:50 +00:00
parent 0b7410c4da
commit 36bdbeeca5
2 changed files with 120 additions and 76 deletions
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5
ld/ChangeLog
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@ -1,3 +1,8 @@
2000-09-21 Michael Sokolov <msokolov@ivan.Harhan.ORG>
* emultempl/m68kelf.em: Conditionalise the embedded relocs feature
on the m68*-*-elf target. Make it support COFF input objects.
2000-09-21 Kazu Hirata <kazu@hxi.com>
* ldmain.c: Fix formatting.

191
ld/emultempl/m68kelf.em
View file

@ -17,76 +17,91 @@
# 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 m68k ELF
# specific routines.
#
# 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
cat >>e${EMULATION_NAME}.c <<EOF
static void m68k_elf_after_open PARAMS((void));
static void m68k_elf_after_open PARAMS ((void));
#ifdef SUPPORT_EMBEDDED_RELOCS
static void check_sections PARAMS ((bfd *, asection *, PTR));
#endif
static void m68k_elf_after_allocation PARAMS ((void));
/* This function is run after all the input files have been opened.
We create a .emreloc section for each input file with a non zero
.data section. The BFD backend will fill in these sections with
magic numbers which can be used to relocate the data section at run
time. */
/* This function is run after all the input files have been opened. */
static void
m68k_elf_after_open ()
{
bfd *abfd;
/* Call the standard elf routine. */
gld${EMULATION_NAME}_after_open ();
if (! command_line.embedded_relocs
|| link_info.relocateable)
return;
for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
#ifdef SUPPORT_EMBEDDED_RELOCS
if (command_line.embedded_relocs
&& (! link_info.relocateable))
{
asection *datasec;
bfd *abfd;
/* As first-order business, make sure that each input BFD is ELF. It
better be, as we are directly calling a ELF backend function. */
if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
einfo ("%F%B: all input objects must be 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)
/* 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 *relsec;
asection *datasec;
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");
/* 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, (PTR) datasec);
}
/* Double check that all other data sections are empty, as is
required for embedded PIC code. */
bfd_map_over_sections (abfd, check_sections, (PTR) 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. */
@ -103,47 +118,71 @@ check_sections (abfd, sec, datasec)
abfd, bfd_get_section_name (abfd, sec));
}
#endif /* SUPPORT_EMBEDDED_RELOCS */
/* This function is called after the section sizes and offsets have
been set. If we are generating embedded relocs, it calls a special
BFD backend routine to do the work. */
been set. */
static void
m68k_elf_after_allocation ()
{
bfd *abfd;
/* Call the standard elf routine. */
gld${EMULATION_NAME}_before_allocation ();
if (! command_line.embedded_relocs
|| link_info.relocateable)
return;
for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
#ifdef SUPPORT_EMBEDDED_RELOCS
if (command_line.embedded_relocs
&& (! link_info.relocateable))
{
asection *datasec, *relsec;
char *errmsg;
bfd *abfd;
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_m68k_elf32_create_embedded_relocs (abfd, &link_info,
datasec, relsec,
&errmsg))
/* 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)
{
if (errmsg == NULL)
einfo ("%B%X: can not create runtime reloc information: %E\n",
abfd);
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
einfo ("%X%B: can not create runtime reloc information: %s\n",
abfd, errmsg);
abort ();
}
}
#endif /* SUPPORT_EMBEDDED_RELOCS */
}
EOF