# This shell script emits a C file. -*- C -*-
-# Copyright (C) 2000 Free Software Foundation, Inc.
+# Copyright (C) 2000-2020 Free Software Foundation, Inc.
# Written by Michael Sokolov <msokolov@ivan.Harhan.ORG>, based on armelf.em
#
-# This file is part of GLD, the Gnu Linker.
+# 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 2 of the License, or
+# 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,
#
# 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.
-#
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
-# This file is sourced from elf32.em, and defines extra m68k ELF
-# specific routines.
-#
-cat >>e${EMULATION_NAME}.c <<EOF
-static void m68k_elf_after_open PARAMS((void));
-static void check_sections PARAMS ((bfd *, asection *, PTR));
-static void m68k_elf_after_allocation PARAMS ((void));
+# This file is sourced from elf.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 elf.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
+
+case ${target} in
+ *-linux*)
+# Don't use multi-GOT by default due to glibc linker's assumption
+# that GOT pointer points to GOT[0].
+# got_handling_target_default=GOT_HANDLING_MULTIGOT
+ got_handling_target_default=GOT_HANDLING_SINGLE
+ ;;
+ *)
+ got_handling_target_default=GOT_HANDLING_SINGLE
+ ;;
+esac
+
+fragment <<EOF
+
+#include "elf32-m68k.h"
+
+#define GOT_HANDLING_SINGLE (0)
+#define GOT_HANDLING_NEGATIVE (1)
+#define GOT_HANDLING_MULTIGOT (2)
+#define GOT_HANDLING_TARGET_DEFAULT ${got_handling_target_default}
-/* This function is run after all the input files have been opened.
- We create a .emreloc section for each input file with a non zero
- .data section. The BFD backend will fill in these sections with
- magic numbers which can be used to relocate the data section at run
- time. */
+/* How to generate GOT. */
+static int got_handling = GOT_HANDLING_DEFAULT;
+
+#ifdef SUPPORT_EMBEDDED_RELOCS
+static void check_sections (bfd *, asection *, void *);
+#endif
+
+/* This function is run after all the input files have been opened. */
static void
-m68k_elf_after_open ()
+m68k_elf_after_open (void)
{
- bfd *abfd;
-
/* Call the standard elf routine. */
gld${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
+ && (!bfd_link_relocatable (&link_info)))
{
- asection *datasec;
-
- /* 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)
+ 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 *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");
+ asection *datasec;
+
+ if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
+ einfo (_("%F%P: %pB: 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)
+ {
+ asection *relsec;
+
+ relsec = bfd_make_section_with_flags (abfd, ".emreloc",
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY));
+ if (relsec == NULL
+ || !bfd_set_section_alignment (relsec, 2)
+ || !bfd_set_section_size (relsec, datasec->reloc_count * 12))
+ einfo (_("%F%P: %pB: 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);
}
-
- /* 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. */
static void
-check_sections (abfd, sec, datasec)
- bfd *abfd;
- asection *sec;
- PTR datasec;
+check_sections (bfd *abfd, asection *sec, void *datasec)
{
- if ((bfd_get_section_flags (abfd, sec) & SEC_DATA)
- && sec != (asection *) datasec
+ if ((bfd_section_flags (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));
+ einfo (_("%X%P: %pB: section %s has relocs; can not use --embedded-relocs\n"),
+ abfd, bfd_section_name (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 ()
+m68k_elf_after_allocation (void)
{
- bfd *abfd;
-
/* Call the standard elf routine. */
- gld${EMULATION_NAME}_before_allocation ();
+ gld${EMULATION_NAME}_after_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
+ && (!bfd_link_relocatable (&link_info)))
{
- asection *datasec, *relsec;
- char *errmsg;
-
- datasec = bfd_get_section_by_name (abfd, ".data");
+ bfd *abfd;
- 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_elf_flavour)
+ {
+ if (! bfd_m68k_elf32_create_embedded_relocs (abfd, &link_info,
+ datasec, relsec,
+ &errmsg))
+ {
+ if (errmsg == NULL)
+ einfo (_("%X%P: %pB: can not create "
+ "runtime reloc information: %E\n"),
+ abfd);
+ else
+ einfo (_("%X%P: %pB: 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 */
+}
+
+/* This is a convenient point to tell BFD about target specific flags.
+ After the output has been created, but before inputs are read. */
+
+static void
+elf_m68k_create_output_section_statements (void)
+{
+ bfd_elf_m68k_set_target_options (&link_info, got_handling);
}
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_GOT 301
+'
+
+PARSE_AND_LIST_LONGOPTS='
+ { "got", required_argument, NULL, OPTION_GOT},
+'
+
+PARSE_AND_LIST_OPTIONS='
+ fprintf (file, _(" --got=<type> Specify GOT handling scheme\n"));
+'
+
+PARSE_AND_LIST_ARGS_CASES='
+ case OPTION_GOT:
+ if (strcmp (optarg, "target") == 0)
+ got_handling = GOT_HANDLING_TARGET_DEFAULT;
+ else if (strcmp (optarg, "single") == 0)
+ got_handling = 0;
+ else if (strcmp (optarg, "negative") == 0)
+ got_handling = 1;
+ else if (strcmp (optarg, "multigot") == 0)
+ got_handling = 2;
+ else
+ einfo (_("%P: unrecognized --got argument '\''%s'\''\n"), optarg);
+ break;
+'
+
# 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
+LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=elf_m68k_create_output_section_statements
projects / binutils-gdb.git / blobdiff