[deliverable/binutils-gdb.git] / ld / emultempl / alphaelf.em

# This shell script emits a C file. -*- C -*-
#   Copyright (C) 2003-2020 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 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 = (void *) lang_os_list.head;
	   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);

  ldelf_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
Commit	Line	Data
	1	# This shell script emits a C file. -- C --
	2	# Copyright (C) 2003-2020 Free Software Foundation, Inc.
	3	#
	4	# This file is part of the GNU Binutils.
	5	#
	6	# This program is free software; you can redistribute it and/or modify
	7	# it under the terms of the GNU General Public License as published by
	8	# the Free Software Foundation; either version 3 of the License, or
	9	# (at your option) any later version.
	10	#
	11	# This program is distributed in the hope that it will be useful,
	12	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	# GNU General Public License for more details.
	15	#
	16	# You should have received a copy of the GNU General Public License
	17	# along with this program; if not, write to the Free Software
	18	# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
	19	# MA 02110-1301, USA.
	20	#
	21
	22	# This file is sourced from elf.em, and defines extra alpha
	23	# specific routines.
	24	#
	25	fragment <<EOF
	26
	27	#include "elf/internal.h"
	28	#include "elf/alpha.h"
	29	#include "elf-bfd.h"
	30
	31	static bfd_boolean limit_32bit;
	32
	33	extern bfd_boolean elf64_alpha_use_secureplt;
	34
	35
	36	/* Set the start address as in the Tru64 ld. */
	37	#define ALPHA_TEXT_START_32BIT 0x12000000
	38
	39	static void
	40	alpha_after_open (void)
	41	{
	42	if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour
	43	&& elf_object_id (link_info.output_bfd) == ALPHA_ELF_DATA)
	44	{
	45	unsigned int num_plt;
	46	lang_output_section_statement_type *os;
	47	lang_output_section_statement_type *plt_os[2];
	48
	49	num_plt = 0;
	50	for (os = (void *) lang_os_list.head;
	51	os != NULL;
	52	os = os->next)
	53	{
	54	if (os->constraint == SPECIAL && strcmp (os->name, ".plt") == 0)
	55	{
	56	if (num_plt < 2)
	57	plt_os[num_plt] = os;
	58	++num_plt;
	59	}
	60	}
	61
	62	if (num_plt == 2)
	63	{
	64	plt_os[0]->constraint = elf64_alpha_use_secureplt ? 0 : -1;
	65	plt_os[1]->constraint = elf64_alpha_use_secureplt ? -1 : 0;
	66	}
	67	}
	68
	69	gld${EMULATION_NAME}_after_open ();
	70	}
	71
	72	static void
	73	alpha_after_parse (void)
	74	{
	75	link_info.relax_pass = 2;
	76	if (limit_32bit
	77	&& !bfd_link_pic (&link_info)
	78	&& !bfd_link_relocatable (&link_info))
	79	lang_section_start (".interp",
	80	exp_binop ('+',
	81	exp_intop (ALPHA_TEXT_START_32BIT),
	82	exp_nameop (SIZEOF_HEADERS, NULL)),
	83	NULL);
	84
	85	ldelf_after_parse ();
	86	}
	87
	88	static void
	89	alpha_before_allocation (void)
	90	{
	91	/* Call main function; we're just extending it. */
	92	gld${EMULATION_NAME}_before_allocation ();
	93
	94	/* Add -relax if -O, not -r, and not explicitly disabled. */
	95	if (link_info.optimize
	96	&& !bfd_link_relocatable (&link_info)
	97	&& ! RELAXATION_DISABLED_BY_USER)
	98	ENABLE_RELAXATION;
	99	}
	100
	101	static void
	102	alpha_finish (void)
	103	{
	104	if (limit_32bit)
	105	elf_elfheader (link_info.output_bfd)->e_flags \|= EF_ALPHA_32BIT;
	106
	107	finish_default ();
	108	}
	109	EOF
	110
	111	# Define some shell vars to insert bits of code into the standard elf
	112	# parse_args and list_options functions.
	113	#
	114	PARSE_AND_LIST_PROLOGUE='
	115	#define OPTION_TASO 300
	116	#define OPTION_SECUREPLT (OPTION_TASO + 1)
	117	#define OPTION_NO_SECUREPLT (OPTION_SECUREPLT + 1)
	118	'
	119
	120	PARSE_AND_LIST_LONGOPTS='
	121	{ "taso", no_argument, NULL, OPTION_TASO },
	122	{ "secureplt", no_argument, NULL, OPTION_SECUREPLT },
	123	{ "no-secureplt", no_argument, NULL, OPTION_NO_SECUREPLT },
	124	'
	125
	126	PARSE_AND_LIST_OPTIONS='
	127	fprintf (file, _("\
	128	--taso Load executable in the lower 31-bit addressable\n\
	129	virtual address range\n"));
	130	fprintf (file, _("\
	131	--secureplt Force PLT in text segment\n"));
	132	fprintf (file, _("\
	133	--no-secureplt Force PLT in data segment\n"));
	134	'
	135
	136	PARSE_AND_LIST_ARGS_CASES='
	137	case OPTION_TASO:
	138	limit_32bit = 1;
	139	break;
	140	case OPTION_SECUREPLT:
	141	elf64_alpha_use_secureplt = TRUE;
	142	break;
	143	case OPTION_NO_SECUREPLT:
	144	elf64_alpha_use_secureplt = FALSE;
	145	break;
	146	'
	147
	148	# Put these extra alpha routines in ld_${EMULATION_NAME}_emulation
	149	#
	150	LDEMUL_AFTER_OPEN=alpha_after_open
	151	LDEMUL_AFTER_PARSE=alpha_after_parse
	152	LDEMUL_BEFORE_ALLOCATION=alpha_before_allocation
	153	LDEMUL_FINISH=alpha_finish