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- # This shell script emits a C file. -*- C -*-
- # It does some substitutions.
- cat >e${EMULATION_NAME}.c <<EOF
- /* This file is is generated by a shell script. DO NOT EDIT! */
-
- /* Handle embedded relocs for MIPS.
- Copyright 1994 Free Software Foundation, Inc.
- Written by Ian Lance Taylor <ian@cygnus.com> based on generic.em.
-
- This file is part of GLD, the Gnu Linker.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
- #define TARGET_IS_${EMULATION_NAME}
-
- #include "bfd.h"
- #include "sysdep.h"
- #include "bfdlink.h"
-
- #include "ld.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${EMULATION_NAME}_after_open ()
- {
- bfd *abfd;
-
- if (! command_line.embedded_relocs
- || link_info.relocateable)
- return;
-
- for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
- {
- asection *datasec;
-
- datasec = bfd_get_section_by_name (abfd, ".sdata");
-
- /* Note that we assume that the reloc_count field has already
- been set up. We could call bfd_get_reloc_upper_bound, but
- that returns the size of a memory buffer rather than a reloc
- count. We do not want to call bfd_canonicalize_reloc,
- because although it would always work it would force us to
- read in the relocs into BFD canonical form, which would waste
- a significant amount of time and memory. */
- if (datasec != NULL && datasec->reloc_count > 0)
- {
- asection *relsec;
-
- relsec = bfd_make_section (abfd, ".rel.sdata");
- if (relsec == NULL
- || ! bfd_set_section_flags (abfd, relsec,
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY))
- || ! bfd_set_section_alignment (abfd, relsec, 2)
- || ! bfd_set_section_size (abfd, relsec,
- datasec->reloc_count * 4))
- einfo ("%F%B: can not create .rel.sdata section: %E");
- }
-
- /* Double check that all other data sections are empty, as is
- required for embedded PIC code. */
- bfd_map_over_sections (abfd, check_sections, (PTR) datasec);
- }
- }
-
- /* Check that of the data sections, only the .sdata section has
- relocs. This is called via bfd_map_over_sections. */
-
- static void
- check_sections (abfd, sec, sdatasec)
- bfd *abfd;
- asection *sec;
- PTR sdatasec;
- {
- if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0
- && sec != (asection *) sdatasec
- && sec->reloc_count != 0)
- einfo ("%P%X: section %s has relocs; can not use --embedded-relocs",
- abfd, bfd_get_section_name (abfd, sec));
- }
-
- /* This function is called after the section sizes and offsets have
- been set. If we are generating embedded relocs, it calls a special
- BFD backend routine to do the work. */
-
- static void
- gld${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
-