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|
# This shell script emits a C file. -*- C -*-
# Copyright (C) 2011-2020 Free Software Foundation, Inc.
#
# 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.
#
# This file is sourced from elf.em, and defines extra C6X DSBT specific
# features.
#
fragment <<EOF
#include "ldctor.h"
#include "elf32-tic6x.h"
static struct elf32_tic6x_params params =
{
0, 64
};
static int merge_exidx_entries = -1;
static int
is_tic6x_target (void)
{
extern const bfd_target tic6x_elf32_le_vec;
extern const bfd_target tic6x_elf32_be_vec;
extern const bfd_target tic6x_elf32_linux_le_vec;
extern const bfd_target tic6x_elf32_linux_be_vec;
extern const bfd_target tic6x_elf32_c6000_le_vec;
extern const bfd_target tic6x_elf32_c6000_be_vec;
return (link_info.output_bfd->xvec == &tic6x_elf32_le_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_be_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_linux_le_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_linux_be_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_c6000_le_vec
|| link_info.output_bfd->xvec == &tic6x_elf32_c6000_be_vec);
}
/* Pass params to backend. */
static void
tic6x_after_open (void)
{
if (is_tic6x_target ())
{
if (params.dsbt_index >= params.dsbt_size)
{
einfo (_("%F%P: invalid --dsbt-index %d, outside DSBT size\n"),
params.dsbt_index);
}
elf32_tic6x_setup (&link_info, ¶ms);
}
gld${EMULATION_NAME}_after_open ();
}
static int
compare_output_sec_vma (const void *a, const void *b)
{
asection *asec = *(asection **) a, *bsec = *(asection **) b;
asection *aout = asec->output_section, *bout = bsec->output_section;
bfd_vma avma, bvma;
/* If there's no output section for some reason, compare equal. */
if (!aout || !bout)
return 0;
avma = aout->vma + asec->output_offset;
bvma = bout->vma + bsec->output_offset;
if (avma > bvma)
return 1;
else if (avma < bvma)
return -1;
return 0;
}
static void
gld${EMULATION_NAME}_after_allocation (void)
{
int layout_changed = 0;
int ret;
if (!bfd_link_relocatable (&link_info))
{
/* Build a sorted list of input text sections, then use that to process
the unwind table index. */
unsigned int list_size = 10;
asection **sec_list = (asection **)
xmalloc (list_size * sizeof (asection *));
unsigned int sec_count = 0;
LANG_FOR_EACH_INPUT_STATEMENT (is)
{
bfd *abfd = is->the_bfd;
asection *sec;
if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
continue;
for (sec = abfd->sections; sec != NULL; sec = sec->next)
{
asection *out_sec = sec->output_section;
if (out_sec
&& elf_section_data (sec)
&& elf_section_type (sec) == SHT_PROGBITS
&& (elf_section_flags (sec) & SHF_EXECINSTR) != 0
&& (sec->flags & SEC_EXCLUDE) == 0
&& sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
&& out_sec != bfd_abs_section_ptr)
{
if (sec_count == list_size)
{
list_size *= 2;
sec_list = (asection **)
xrealloc (sec_list, list_size * sizeof (asection *));
}
sec_list[sec_count++] = sec;
}
}
}
qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma);
if (elf32_tic6x_fix_exidx_coverage (sec_list, sec_count, &link_info,
merge_exidx_entries))
layout_changed = 1;
free (sec_list);
}
/* bfd_elf32_discard_info just plays with debugging sections,
ie. doesn't affect any code, so we can delay resizing the
sections. */
ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
if (ret < 0)
{
einfo (_("%X%P: .eh_frame/.stab edit: %E\n"));
return;
}
else if (ret > 0)
layout_changed = 1;
ldelf_map_segments (layout_changed);
}
EOF
# This code gets inserted into the generic elf32.sc linker script
# and allows us to define our own command line switches.
PARSE_AND_LIST_PROLOGUE='
#define OPTION_DSBT_INDEX 300
#define OPTION_DSBT_SIZE 301
#define OPTION_NO_MERGE_EXIDX_ENTRIES 302
'
PARSE_AND_LIST_LONGOPTS='
{"dsbt-index", required_argument, NULL, OPTION_DSBT_INDEX},
{"dsbt-size", required_argument, NULL, OPTION_DSBT_SIZE},
{ "no-merge-exidx-entries", no_argument, NULL, OPTION_NO_MERGE_EXIDX_ENTRIES },
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _(" --dsbt-index <index> Use this as the DSBT index for the output object\n"));
fprintf (file, _(" --dsbt-size <index> Use this as the number of entries in the DSBT table\n"));
fprintf (file, _(" --no-merge-exidx-entries\n"));
fprintf (file, _(" Disable merging exidx entries\n"));
'
PARSE_AND_LIST_ARGS_CASES='
case OPTION_DSBT_INDEX:
{
char *end;
params.dsbt_index = strtol (optarg, &end, 0);
if (*end == 0
&& params.dsbt_index >= 0 && params.dsbt_index < 0x7fff)
break;
einfo (_("%F%P: invalid --dsbt-index %s\n"), optarg);
}
break;
case OPTION_DSBT_SIZE:
{
char *end;
params.dsbt_size = strtol (optarg, &end, 0);
if (*end == 0
&& params.dsbt_size >= 0 && params.dsbt_size < 0x7fff)
break;
einfo (_("%F%P: invalid --dsbt-size %s\n"), optarg);
}
break;
case OPTION_NO_MERGE_EXIDX_ENTRIES:
merge_exidx_entries = 0;
'
LDEMUL_AFTER_OPEN=tic6x_after_open
LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
|
