231 lines
7.1 KiB
Text
231 lines
7.1 KiB
Text
|
# 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
|