188 lines
5.5 KiB
Plaintext
188 lines
5.5 KiB
Plaintext
# This shell script emits a C file. -*- C -*-
|
|
# Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000
|
|
# Free Software Foundation, Inc.
|
|
#
|
|
# 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.
|
|
#
|
|
|
|
# This file is sourced from elf32.em, and defines extra arm-elf
|
|
# specific routines.
|
|
#
|
|
cat >>e${EMULATION_NAME}.c <<EOF
|
|
|
|
static int no_pipeline_knowledge = 0;
|
|
static char *thumb_entry_symbol = NULL;
|
|
|
|
|
|
static void
|
|
gld${EMULATION_NAME}_before_parse ()
|
|
{
|
|
#ifndef TARGET_ /* I.e., if not generic. */
|
|
ldfile_set_output_arch ("`echo ${ARCH}`");
|
|
#endif /* not TARGET_ */
|
|
config.dynamic_link = ${DYNAMIC_LINK-true};
|
|
config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`;
|
|
}
|
|
|
|
|
|
static void arm_elf_after_open PARAMS((void));
|
|
|
|
static void
|
|
arm_elf_after_open ()
|
|
{
|
|
if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
|
|
{
|
|
/* The arm backend needs special fields in the output hash structure.
|
|
These will only be created if the output format is an arm format,
|
|
hence we do not support linking and changing output formats at the
|
|
same time. Use a link followed by objcopy to change output formats. */
|
|
einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
|
|
return;
|
|
}
|
|
|
|
{
|
|
LANG_FOR_EACH_INPUT_STATEMENT (is)
|
|
{
|
|
/* The interworking bfd must be the last one to be processed */
|
|
if (!is->next)
|
|
bfd_elf32_arm_get_bfd_for_interworking (is->the_bfd, & link_info);
|
|
}
|
|
}
|
|
|
|
/* Call the standard elf routine. */
|
|
gld${EMULATION_NAME}_after_open ();
|
|
}
|
|
|
|
|
|
static void arm_elf_before_allocation PARAMS ((void));
|
|
|
|
static void
|
|
arm_elf_before_allocation ()
|
|
{
|
|
/* Call the standard elf routine. */
|
|
gld${EMULATION_NAME}_before_allocation ();
|
|
|
|
/* We should be able to set the size of the interworking stub section */
|
|
|
|
/* Here we rummage through the found bfds to collect glue information */
|
|
/* FIXME: should this be based on a command line option? krk@cygnus.com */
|
|
{
|
|
LANG_FOR_EACH_INPUT_STATEMENT (is)
|
|
{
|
|
if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info,
|
|
no_pipeline_knowledge))
|
|
{
|
|
/* xgettext:c-format */
|
|
einfo (_("Errors encountered processing file %s"), is->filename);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We have seen it all. Allocate it, and carry on */
|
|
bfd_elf32_arm_allocate_interworking_sections (& link_info);
|
|
}
|
|
|
|
|
|
static void gld${EMULATION_NAME}_finish PARAMS ((void));
|
|
|
|
static void
|
|
gld${EMULATION_NAME}_finish PARAMS((void))
|
|
{
|
|
struct bfd_link_hash_entry * h;
|
|
|
|
if (thumb_entry_symbol == NULL)
|
|
return;
|
|
|
|
h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
|
|
false, false, true);
|
|
|
|
if (h != (struct bfd_link_hash_entry *) NULL
|
|
&& (h->type == bfd_link_hash_defined
|
|
|| h->type == bfd_link_hash_defweak)
|
|
&& h->u.def.section->output_section != NULL)
|
|
{
|
|
static char buffer[32];
|
|
bfd_vma val;
|
|
|
|
/* Special procesing is required for a Thumb entry symbol. The
|
|
bottom bit of its address must be set. */
|
|
val = (h->u.def.value
|
|
+ bfd_get_section_vma (output_bfd,
|
|
h->u.def.section->output_section)
|
|
+ h->u.def.section->output_offset);
|
|
|
|
val |= 1;
|
|
|
|
/* Now convert this value into a string and store it in entry_symbol
|
|
where the lang_finish() function will pick it up. */
|
|
buffer[0] = '0';
|
|
buffer[1] = 'x';
|
|
|
|
sprintf_vma (buffer + 2, val);
|
|
|
|
if (entry_symbol != NULL && entry_from_cmdline)
|
|
einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
|
|
thumb_entry_symbol, entry_symbol);
|
|
entry_symbol = buffer;
|
|
}
|
|
else
|
|
einfo (_("%P: warning: connot find thumb start symbol %s\n"),
|
|
thumb_entry_symbol);
|
|
}
|
|
|
|
EOF
|
|
|
|
# Define some shell vars to insert bits of code into the standard elf
|
|
# parse_args and list_options functions.
|
|
#
|
|
PARSE_AND_LIST_PROLOGUE='
|
|
#define OPTION_THUMB_ENTRY 301
|
|
'
|
|
|
|
PARSE_AND_LIST_SHORTOPTS=p
|
|
|
|
PARSE_AND_LIST_LONGOPTS='
|
|
{ "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
|
|
{ "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
|
|
'
|
|
|
|
PARSE_AND_LIST_OPTIONS='
|
|
fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n"));
|
|
fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n"));
|
|
'
|
|
|
|
PARSE_AND_LIST_ARGS_CASES='
|
|
case '\'p\'':
|
|
no_pipeline_knowledge = 1;
|
|
break;
|
|
|
|
case OPTION_THUMB_ENTRY:
|
|
thumb_entry_symbol = optarg;
|
|
break;
|
|
'
|
|
|
|
# We have our own after_open and before_allocation functions, but they call
|
|
# the standard routines, so give them a different name.
|
|
LDEMUL_AFTER_OPEN=arm_elf_after_open
|
|
LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation
|
|
|
|
# Replace the elf before_parse function with our own.
|
|
LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
|
|
|
|
# Call the extra arm-elf function
|
|
LDEMUL_FINISH=gld${EMULATION_NAME}_finish
|