--- /dev/null
+# Copyright 2002 Free Software Foundation, Inc.
+# Written by Mitch Lichtenberg <mpl@broadcom.com> and
+# Chris Demetriou <cgd@broadcom.com> based on m68kelf.em and mipsecoff.em.
+#
+# 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 shell script emits a C file. -*- C -*-
+
+
+# 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 ${target} in
+ mips*-*-elf)
+ echo "#define SUPPORT_EMBEDDED_RELOCS" >>e${EMULATION_NAME}.c
+ ;;
+esac
+
+cat >>e${EMULATION_NAME}.c <<EOF
+
+static void mips_elf${ELFSIZE}_after_open PARAMS ((void));
+#ifdef SUPPORT_EMBEDDED_RELOCS
+static void mips_elf${ELFSIZE}_check_sections PARAMS ((bfd *, asection *,
+ PTR));
+#endif
+static void mips_elf${ELFSIZE}_after_allocation PARAMS ((void));
+
+/* This function is run after all the input files have been opened. */
+
+static void
+mips_elf${ELFSIZE}_after_open()
+{
+ /* Call the standard elf routine. */
+ gld${EMULATION_NAME}_after_open ();
+
+#ifdef SUPPORT_EMBEDDED_RELOCS
+ if (command_line.embedded_relocs && (! link_info.relocateable))
+ {
+ bfd *abfd;
+
+ /* In the embedded relocs mode we create a .rel.sdata section for
+ each input file with a .sdata section which has has
+ relocations. 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
+ ELF. We need to call a special BFD backend function to
+ generate the embedded relocs, and we have that function
+ only for ELF */
+
+ if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
+ einfo ("%F%B: all input objects must be ELF for --embedded-relocs\n");
+
+ if (bfd_get_arch_size (abfd) != ${ELFSIZE})
+ einfo ("%F%B: all input objects must be ${ELFSIZE}-bit ELF for --embedded-relocs\n");
+
+ datasec = bfd_get_section_by_name (abfd, ".sdata");
+
+ /* Note that we assume that the reloc_count field has already
+ been set up. We could call bfd_get_reloc_upper_bound, but
+ that returns the size of a memory buffer rather than a reloc
+ count. We do not want to call bfd_canonicalize_reloc,
+ because although it would always work it would force us to
+ read in the relocs into BFD canonical form, which would waste
+ a significant amount of time and memory. */
+
+ if (datasec != NULL && datasec->reloc_count > 0)
+ {
+ asection *relsec;
+
+ relsec = bfd_make_section (abfd, ".rel.sdata");
+ if (relsec == NULL
+ || ! bfd_set_section_flags (abfd, relsec,
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY))
+ || ! bfd_set_section_alignment (abfd, relsec,
+ (${ELFSIZE} == 32) ? 2 : 3)
+ || ! bfd_set_section_size (abfd, relsec,
+ datasec->reloc_count
+ * ((${ELFSIZE} / 8) + 8)))
+ einfo ("%F%B: cannot create .rel.sdata section: %E\n");
+ }
+
+ /* Double check that all other data sections have no relocs,
+ as is required for embedded PIC code. */
+ bfd_map_over_sections (abfd, mips_elf${ELFSIZE}_check_sections,
+ (PTR) datasec);
+ }
+ }
+#endif /* SUPPORT_EMBEDDED_RELOCS */
+}
+
+#ifdef SUPPORT_EMBEDDED_RELOCS
+/* Check that of the data sections, only the .sdata section has
+ relocs. This is called via bfd_map_over_sections. */
+
+static void
+mips_elf${ELFSIZE}_check_sections (abfd, sec, sdatasec)
+ bfd *abfd;
+ asection *sec;
+ PTR sdatasec;
+{
+ if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0
+ && sec != (asection *) sdatasec
+ && sec->reloc_count != 0)
+ einfo ("%F%X: section %s has relocs; cannot use --embedded-relocs\n",
+ abfd, bfd_get_section_name (abfd, sec));
+}
+#endif /* SUPPORT_EMBEDDED_RELOCS */
+
+/* This function is called after the section sizes and offsets have
+ been set. If we are generating embedded relocs, it calls a special
+ BFD backend routine to do the work. */
+
+static void
+mips_elf${ELFSIZE}_after_allocation ()
+{
+ /* Call the standard elf routine. */
+ after_allocation_default ();
+
+#ifdef SUPPORT_EMBEDDED_RELOCS
+ if (command_line.embedded_relocs && (! link_info.relocateable))
+ {
+ bfd *abfd;
+
+ for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
+ {
+ asection *datasec, *relsec;
+ char *errmsg;
+
+ datasec = bfd_get_section_by_name (abfd, ".sdata");
+
+ if (datasec == NULL || datasec->reloc_count == 0)
+ continue;
+
+ relsec = bfd_get_section_by_name (abfd, ".rel.sdata");
+ ASSERT (relsec != NULL);
+
+ if (! bfd_mips_elf${ELFSIZE}_create_embedded_relocs (abfd,
+ &link_info,
+ datasec,
+ relsec,
+ &errmsg))
+ {
+ if (errmsg == NULL)
+ einfo ("%B%X: can not create runtime reloc information: %E\n",
+ abfd);
+ else
+ einfo ("%X%B: can not create runtime reloc information: %s\n",
+ abfd, errmsg);
+ }
+ }
+ }
+#endif /* SUPPORT_EMBEDDED_RELOCS */
+}
+
+EOF
+
+# We have our own after_open and after_allocation functions, but they call
+# the standard routines, so give them a different name.
+LDEMUL_AFTER_OPEN=mips_elf${ELFSIZE}_after_open
+LDEMUL_AFTER_ALLOCATION=mips_elf${ELFSIZE}_after_allocation
projects / binutils-gdb.git / commitdiff