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# This shell script emits a C file. -*- C -*-
# Copyright 2003, 2005 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
#
# This file is sourced from elf32.em, and defines extra powerpc32-elf
# specific routines.
#
cat >>e${EMULATION_NAME}.c <<EOF
#include "libbfd.h"
#include "elf32-ppc.h"
extern const bfd_target bfd_elf32_powerpc_vec;
extern const bfd_target bfd_elf32_powerpcle_vec;
extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
static inline int
is_ppc_elf32_vec(const bfd_target * vec)
{
return (vec == &bfd_elf32_powerpc_vec
|| vec == &bfd_elf32_powerpc_vxworks_vec
|| vec == &bfd_elf32_powerpcle_vec);
}
/* Whether to run tls optimization. */
static int notlsopt = 0;
/* Chooses the correct place for .plt and .got. */
static int old_plt = 0;
static int old_got = 0;
static void
ppc_after_open (void)
{
if (is_ppc_elf32_vec (link_info.hash->creator))
{
int new_plt;
int keep_new;
unsigned int num_plt;
unsigned int num_got;
lang_output_section_statement_type *os;
lang_output_section_statement_type *plt_os[2];
lang_output_section_statement_type *got_os[2];
new_plt = ppc_elf_select_plt_layout (output_bfd, &link_info, old_plt);
if (new_plt < 0)
einfo ("%X%P: select_plt_layout problem %E\n");
num_got = 0;
num_plt = 0;
for (os = &lang_output_section_statement.head->output_section_statement;
os != NULL;
os = os->next)
{
if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0)
{
if (num_plt < 2)
plt_os[num_plt] = os;
++num_plt;
}
if (os->constraint == SPECIAL && strcmp (os->name, ".got") == 0)
{
if (num_got < 2)
got_os[num_got] = os;
++num_got;
}
}
keep_new = new_plt == 1 ? 0 : -1;
if (num_plt == 2)
{
plt_os[0]->constraint = keep_new;
plt_os[1]->constraint = ~keep_new;
}
if (num_got == 2)
{
if (old_got)
keep_new = -1;
got_os[0]->constraint = keep_new;
got_os[1]->constraint = ~keep_new;
}
}
gld${EMULATION_NAME}_after_open ();
}
static void
ppc_before_allocation (void)
{
if (is_ppc_elf32_vec (link_info.hash->creator))
{
if (ppc_elf_tls_setup (output_bfd, &link_info) && !notlsopt)
{
if (!ppc_elf_tls_optimize (output_bfd, &link_info))
{
einfo ("%X%P: TLS problem %E\n");
return;
}
}
}
gld${EMULATION_NAME}_before_allocation ();
}
static void
ppc_do_assignments (void)
{
asection *s;
if (is_ppc_elf32_vec (link_info.hash->creator))
ppc_elf_set_sdata_syms (output_bfd, &link_info);
s = bfd_get_section_by_name (output_bfd, ".sbss");
_bfd_elf_provide_section_bound_symbols (&link_info, s,
"__sbss_start", "__sbss_end");
_bfd_elf_provide_section_bound_symbols (&link_info, s,
"___sbss_start", "___sbss_end");
gld${EMULATION_NAME}_provide_init_fini_syms ();
}
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_NO_TLS_OPT 301
#define OPTION_OLD_PLT 302
#define OPTION_OLD_GOT 303
'
PARSE_AND_LIST_LONGOPTS='
{ "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
{ "bss-plt", no_argument, NULL, OPTION_OLD_PLT },
{ "sdata-got", no_argument, NULL, OPTION_OLD_GOT },
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _("\
--no-tls-optimize Don'\''t try to optimize TLS accesses.\n\
--bss-plt Force old-style BSS PLT.\n\
--sdata-got Force GOT location just before .sdata.\n"
));
'
PARSE_AND_LIST_ARGS_CASES='
case OPTION_NO_TLS_OPT:
notlsopt = 1;
break;
case OPTION_OLD_PLT:
old_plt = 1;
break;
case OPTION_OLD_GOT:
old_got = 1;
break;
'
# Put these extra ppc32elf routines in ld_${EMULATION_NAME}_emulation
#
LDEMUL_AFTER_OPEN=ppc_after_open
LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
LDEMUL_DO_ASSIGNMENTS=ppc_do_assignments
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