old-cross-binutils/ld/emultempl/linux.em
Ian Lance Taylor 08f20f66c4 Thu Jun 16 14:25:22 1994 Eric Youngdale (ericy@cais.cais.com)
* emultempl/linux.em: New file providing support for linking
	against Linux shared libraries.
	* config/i386-linux.mt (ei386linux.c): Depend upon linux.em.
	* emulparams/i386linux.sh (TEMPLATE_NAME): Define as linux.
1994-06-16 18:36:40 +00:00

155 lines
4.3 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! */
/* Linux a.out emulation code for ${EMULATION_NAME}
Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
Written by Steve Chamberlain <sac@cygnus.com>
Linux support by Eric Youngdale <ericy@cais.cais.com>
This file is part of GLD, the Gnu Linker.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#define TARGET_IS_${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"
#include "ldexp.h"
#include "ldlang.h"
static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
static boolean gld${EMULATION_NAME}_open_dynamic_archive
PARAMS ((const char *, lang_input_statement_type *));
static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
static void
gld${EMULATION_NAME}_before_parse()
{
ldfile_output_architecture = bfd_arch_${ARCH};
config.dynamic_link = true;
}
/* Try to open a dynamic archive. This is where we know that Linux
dynamic libraries have an extension of .sa. */
static boolean
gld${EMULATION_NAME}_open_dynamic_archive (arch, entry)
const char *arch;
lang_input_statement_type *entry;
{
return ldfile_open_file_search (arch, entry, "lib", ".sa");
}
/* This is called after the sections have been attached to output
sections, but before any sizes or addresses have been set. */
static void
gld${EMULATION_NAME}_before_allocation ()
{
if (link_info.relocateable)
return;
/* Let the backend work out the sizes of any sections required by
dynamic linking. */
if (! bfd_linux_size_dynamic_sections (output_bfd, &link_info))
einfo ("%P%F: failed to set dynamic section sizes: %E\n");
}
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='s/["\\]/\\&/g
s/$/\\n\\/
1s/^/"/
$s/$/n"/
'
cat >>e${EMULATION_NAME}.c <<EOF
{
*isfile = 0;
if (link_info.relocateable == true && config.build_constructors == true)
return `sed "$sc" ldscripts/${EMULATION_NAME}.xu`;
else if (link_info.relocateable == true)
return `sed "$sc" ldscripts/${EMULATION_NAME}.xr`;
else if (!config.text_read_only)
return `sed "$sc" ldscripts/${EMULATION_NAME}.xbn`;
else if (!config.magic_demand_paged)
return `sed "$sc" ldscripts/${EMULATION_NAME}.xn`;
else
return `sed "$sc" ldscripts/${EMULATION_NAME}.x`;
}
EOF
else
# Scripts read from the filesystem.
cat >>e${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,
after_allocation_default,
set_output_arch_default,
ldemul_default_target,
gld${EMULATION_NAME}_before_allocation,
gld${EMULATION_NAME}_get_script,
"${EMULATION_NAME}",
"${OUTPUT_FORMAT}",
NULL,
NULL,
gld${EMULATION_NAME}_open_dynamic_archive
};
EOF