--- /dev/null
+# This shell script emits a C file. -*- C -*-
+# It does some substitutions.
+cat >e${EMULATION_NAME}.c <<EOF
+/* This file is is generated by a shell script. DO NOT EDIT! */
+
+/* Handle embedded relocs for MIPS.
+ Copyright 1994 Free Software Foundation, Inc.
+ Written by Ian Lance Taylor <ian@cygnus.com> based on generic.em.
+
+This file is part of GLD, the Gnu Linker.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#define TARGET_IS_${EMULATION_NAME}
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "bfdlink.h"
+
+#include "ld.h"
+#include "config.h"
+#include "ldmain.h"
+#include "ldemul.h"
+#include "ldfile.h"
+#include "ldmisc.h"
+
+static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
+static void gld${EMULATION_NAME}_after_open PARAMS ((void));
+static void check_sections PARAMS ((bfd *, asection *, PTR));
+static void gld${EMULATION_NAME}_after_allocation PARAMS ((void));
+static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
+
+static void
+gld${EMULATION_NAME}_before_parse()
+{
+#ifndef TARGET_ /* I.e., if not generic. */
+ ldfile_output_architecture = bfd_arch_${ARCH};
+#endif /* not TARGET_ */
+}
+
+/* This function is run after all the input files have been opened.
+ We create a .rel.sdata section for each input file with a non zero
+ .sdata 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 will only do the right thing if all the input files
+ have been compiled using -membedded-pic. */
+
+static void
+gld${EMULATION_NAME}_after_open ()
+{
+ bfd *abfd;
+
+ if (! command_line.embedded_relocs
+ || link_info.relocateable)
+ return;
+
+ for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
+ {
+ asection *datasec;
+
+ datasec = bfd_get_section_by_name (abfd, ".sdata");
+
+ /* Note that we assume that the reloc_count field has already
+ been set up. We could call bfd_get_reloc_upper_bound, but
+ that returns the size of a memory buffer rather than a reloc
+ count. We do not want to call bfd_canonicalize_reloc,
+ because although it would always work it would force us to
+ read in the relocs into BFD canonical form, which would waste
+ a significant amount of time and memory. */
+ if (datasec != NULL && datasec->reloc_count > 0)
+ {
+ asection *relsec;
+
+ relsec = bfd_make_section (abfd, ".rel.sdata");
+ if (relsec == NULL
+ || ! bfd_set_section_flags (abfd, relsec,
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY))
+ || ! bfd_set_section_alignment (abfd, relsec, 2)
+ || ! bfd_set_section_size (abfd, relsec,
+ datasec->reloc_count * 4))
+ einfo ("%F%B: can not create .rel.sdata section: %E");
+ }
+
+ /* Double check that all other data sections are empty, as is
+ required for embedded PIC code. */
+ bfd_map_over_sections (abfd, check_sections, (PTR) datasec);
+ }
+}
+
+/* Check that of the data sections, only the .sdata section has
+ relocs. This is called via bfd_map_over_sections. */
+
+static void
+check_sections (abfd, sec, sdatasec)
+ bfd *abfd;
+ asection *sec;
+ PTR sdatasec;
+{
+ if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0
+ && sec != (asection *) sdatasec
+ && sec->reloc_count != 0)
+ einfo ("%F%X: section %s has relocs; can not use --embedded-relocs",
+ abfd, bfd_get_section_name (abfd, sec));
+}
+
+/* This function is called after the section sizes and offsets have
+ been set. If we are generating embedded relocs, it calls a special
+ BFD backend routine to do the work. */
+
+static void
+gld${EMULATION_NAME}_after_allocation ()
+{
+ bfd *abfd;
+
+ if (! command_line.embedded_relocs
+ || link_info.relocateable)
+ return;
+
+ 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_ecoff_create_embedded_relocs (abfd, &link_info,
+ datasec, relsec,
+ &errmsg))
+ {
+ if (errmsg == NULL)
+ einfo ("%B%X: can not create runtime reloc information: %E",
+ abfd);
+ else
+ einfo ("%X%B: can not create runtime reloc information: %s",
+ abfd, errmsg);
+ }
+ }
+}
+
+static char *
+gld${EMULATION_NAME}_get_script(isfile)
+ int *isfile;
+EOF
+
+if test -n "$COMPILE_IN"
+then
+# Scripts compiled in.
+
+# sed commands to quote an ld script as a C string.
+sc="-f ${srcdir}/emultempl/stringify.sed"
+
+cat >>e${EMULATION_NAME}.c <<EOF
+{
+ *isfile = 0;
+
+ if (link_info.relocateable == true && config.build_constructors == true)
+ return
+EOF
+sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
+echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
+echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
+echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
+echo ' ; else return' >> e${EMULATION_NAME}.c
+sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
+echo '; }' >> e${EMULATION_NAME}.c
+
+else
+# Scripts read from the filesystem.
+
+cat >>e${EMULATION_NAME}.c <<EOF
+{
+ *isfile = 1;
+
+ if (link_info.relocateable == true && config.build_constructors == true)
+ return "ldscripts/${EMULATION_NAME}.xu";
+ else if (link_info.relocateable == true)
+ return "ldscripts/${EMULATION_NAME}.xr";
+ else if (!config.text_read_only)
+ return "ldscripts/${EMULATION_NAME}.xbn";
+ else if (!config.magic_demand_paged)
+ return "ldscripts/${EMULATION_NAME}.xn";
+ else
+ return "ldscripts/${EMULATION_NAME}.x";
+}
+EOF
+
+fi
+
+cat >>e${EMULATION_NAME}.c <<EOF
+
+struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
+{
+ gld${EMULATION_NAME}_before_parse,
+ syslib_default,
+ hll_default,
+ after_parse_default,
+ gld${EMULATION_NAME}_after_open,
+ gld${EMULATION_NAME}_after_allocation,
+ set_output_arch_default,
+ ldemul_default_target,
+ before_allocation_default,
+ gld${EMULATION_NAME}_get_script,
+ "${EMULATION_NAME}",
+ "${OUTPUT_FORMAT}"
+};
+EOF
projects / binutils-gdb.git / commitdiff