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# This shell script emits a C file. -*- C -*-
# Copyright (C) 2003-2019 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 elf32.em, and defines extra alpha
# specific routines.
#
fragment <<EOF
#include "elf/internal.h"
#include "elf/alpha.h"
#include "elf-bfd.h"
static bfd_boolean limit_32bit;
extern bfd_boolean elf64_alpha_use_secureplt;
/* Set the start address as in the Tru64 ld. */
#define ALPHA_TEXT_START_32BIT 0x12000000
static void
alpha_after_open (void)
{
if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
&& elf_object_id (link_info.output_bfd) == ALPHA_ELF_DATA)
{
unsigned int num_plt;
lang_output_section_statement_type *os;
lang_output_section_statement_type *plt_os[2];
num_plt = 0;
for (os = &lang_os_list.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 (num_plt == 2)
{
plt_os[0]->constraint = elf64_alpha_use_secureplt ? 0 : -1;
plt_os[1]->constraint = elf64_alpha_use_secureplt ? -1 : 0;
}
}
gld${EMULATION_NAME}_after_open ();
}
static void
alpha_after_parse (void)
{
link_info.relax_pass = 2;
if (limit_32bit
&& !bfd_link_pic (&link_info)
&& !bfd_link_relocatable (&link_info))
lang_section_start (".interp",
exp_binop ('+',
exp_intop (ALPHA_TEXT_START_32BIT),
exp_nameop (SIZEOF_HEADERS, NULL)),
NULL);
gld${EMULATION_NAME}_after_parse ();
}
static void
alpha_before_allocation (void)
{
/* Call main function; we're just extending it. */
gld${EMULATION_NAME}_before_allocation ();
/* Add -relax if -O, not -r, and not explicitly disabled. */
if (link_info.optimize
&& !bfd_link_relocatable (&link_info)
&& ! RELAXATION_DISABLED_BY_USER)
ENABLE_RELAXATION;
}
static void
alpha_finish (void)
{
if (limit_32bit)
elf_elfheader (link_info.output_bfd)->e_flags |= EF_ALPHA_32BIT;
finish_default ();
}
EOF
# Define some shell vars to insert bits of code into the standard elf
# parse_args and list_options functions.
#
PARSE_AND_LIST_PROLOGUE='
#define OPTION_TASO 300
#define OPTION_SECUREPLT (OPTION_TASO + 1)
#define OPTION_NO_SECUREPLT (OPTION_SECUREPLT + 1)
'
PARSE_AND_LIST_LONGOPTS='
{ "taso", no_argument, NULL, OPTION_TASO },
{ "secureplt", no_argument, NULL, OPTION_SECUREPLT },
{ "no-secureplt", no_argument, NULL, OPTION_NO_SECUREPLT },
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _("\
--taso Load executable in the lower 31-bit addressable\n\
virtual address range\n"));
fprintf (file, _("\
--secureplt Force PLT in text segment\n"));
fprintf (file, _("\
--no-secureplt Force PLT in data segment\n"));
'
PARSE_AND_LIST_ARGS_CASES='
case OPTION_TASO:
limit_32bit = 1;
break;
case OPTION_SECUREPLT:
elf64_alpha_use_secureplt = TRUE;
break;
case OPTION_NO_SECUREPLT:
elf64_alpha_use_secureplt = FALSE;
break;
'
# Put these extra alpha routines in ld_${EMULATION_NAME}_emulation
#
LDEMUL_AFTER_OPEN=alpha_after_open
LDEMUL_AFTER_PARSE=alpha_after_parse
LDEMUL_BEFORE_ALLOCATION=alpha_before_allocation
LDEMUL_FINISH=alpha_finish
|
