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|
# This shell script emits a C file. -*- C -*-
# It does some substitutions.
if [ -z "$MACHINE" ]; then
OUTPUT_ARCH=${ARCH}
else
OUTPUT_ARCH=${ARCH}:${MACHINE}
fi
fragment <<EOF
/* This file is is generated by a shell script. DO NOT EDIT! */
/* Linux a.out emulation code for ${EMULATION_NAME}
Copyright (C) 1991-2021 Free Software Foundation, Inc.
Written by Steve Chamberlain <sac@cygnus.com>
Linux support by Eric Youngdale <ericy@cais.cais.com>
This file is part of the GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#define TARGET_IS_${EMULATION_NAME}
#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "ctf-api.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldemul.h"
static void
gld${EMULATION_NAME}_before_parse (void)
{
ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);
input_flags.dynamic = true;
config.has_shared = true;
link_info.check_relocs_after_open_input = true;
EOF
if test -n "$COMMONPAGESIZE"; then
fragment <<EOF
link_info.relro = DEFAULT_LD_Z_RELRO;
EOF
fi
fragment <<EOF
}
/* Try to open a dynamic archive. This is where we know that Linux
dynamic libraries have an extension of .sa. */
static bool
gld${EMULATION_NAME}_open_dynamic_archive
(const char *arch, search_dirs_type *search, lang_input_statement_type *entry)
{
char *string;
if (! entry->flags.maybe_archive || entry->flags.full_name_provided)
return false;
string = (char *) xmalloc (strlen (search->name)
+ strlen (entry->filename)
+ strlen (arch)
+ sizeof "/lib.sa");
sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch);
if (! ldfile_try_open_bfd (string, entry))
{
free (string);
return false;
}
entry->filename = string;
return true;
}
/* This is called by the create_output_section_statements routine via
lang_for_each_statement. It locates any address assignment to
.text, and modifies it to include the size of the headers. This
causes -Ttext to mean the starting address of the header, rather
than the starting address of .text, which is compatible with other
Linux tools. */
static void
gld${EMULATION_NAME}_find_address_statement (lang_statement_union_type *s)
{
if (s->header.type == lang_address_statement_enum
&& strcmp (s->address_statement.section_name, ".text") == 0)
{
ASSERT (s->address_statement.address->type.node_class == etree_value);
s->address_statement.address->value.value += 0x20;
}
}
/* This is called before opening the input BFD's. */
static void
gld${EMULATION_NAME}_create_output_section_statements (void)
{
lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement);
}
/* This is called after the sections have been attached to output
sections, but before any sizes or addresses have been set. */
static void
gld${EMULATION_NAME}_before_allocation (void)
{
if (bfd_link_relocatable (&link_info))
return;
/* Let the backend work out the sizes of any sections required by
dynamic linking. */
if (! bfd_${EMULATION_NAME}_size_dynamic_sections (link_info.output_bfd,
&link_info))
einfo (_("%F%P: failed to set dynamic section sizes: %E\n"));
before_allocation_default ();
}
static char *
gld${EMULATION_NAME}_get_script (int *isfile)
EOF
if test x"$COMPILE_IN" = xyes
then
# Scripts compiled in.
# sed commands to quote an ld script as a C string.
sc="-f stringify.sed"
fragment <<EOF
{
*isfile = 0;
if (bfd_link_relocatable (&link_info) && config.build_constructors)
return
EOF
sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${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.
fragment <<EOF
{
*isfile = 1;
if (bfd_link_relocatable (&link_info) && config.build_constructors)
return "ldscripts/${EMULATION_NAME}.xu";
else if (bfd_link_relocatable (&link_info))
return "ldscripts/${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/${EMULATION_NAME}.x";
}
EOF
fi
fragment <<EOF
struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
{
gld${EMULATION_NAME}_before_parse,
syslib_default,
hll_default,
after_parse_default,
after_open_default,
after_check_relocs_default,
before_place_orphans_default,
after_allocation_default,
set_output_arch_default,
ldemul_default_target,
gld${EMULATION_NAME}_before_allocation,
gld${EMULATION_NAME}_get_script,
"${EMULATION_NAME}",
"${OUTPUT_FORMAT}",
finish_default,
gld${EMULATION_NAME}_create_output_section_statements,
gld${EMULATION_NAME}_open_dynamic_archive,
NULL, /* place orphan */
NULL, /* set symbols */
NULL, /* parse args */
NULL, /* add_options */
NULL, /* handle_option */
NULL, /* unrecognized file */
NULL, /* list options */
NULL, /* recognized file */
NULL, /* find_potential_libraries */
NULL, /* new_vers_pattern */
NULL, /* extra_map_file_text */
${LDEMUL_EMIT_CTF_EARLY-NULL},
${LDEMUL_ACQUIRE_STRINGS_FOR_CTF-NULL},
${LDEMUL_NEW_DYNSYM_FOR_CTF-NULL},
${LDEMUL_PRINT_SYMBOL-NULL}
};
EOF
|
