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

# This shell script emits a C file. -*- C -*-
# It does some substitutions.
cat >e${EMULATION_NAME}.c <<EOF
/* This file is is generated by a shell script.  DO NOT EDIT! */

/* Linux a.out emulation code for ${EMULATION_NAME}
   Copyright (C) 1991, 93, 94, 95, 96, 98, 1999 Free Software Foundation, Inc.
   Written by Steve Chamberlain <sac@cygnus.com>
   Linux support by Eric Youngdale <ericy@cais.cais.com>

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.  */

#define TARGET_IS_${EMULATION_NAME}

#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"

#include "ld.h"
#include "ldmain.h"
#include "ldemul.h"
#include "ldfile.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"

static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
static boolean gld${EMULATION_NAME}_open_dynamic_archive
  PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *));
static void gld${EMULATION_NAME}_find_address_statement
  PARAMS ((lang_statement_union_type *));
static void gld${EMULATION_NAME}_create_output_section_statements
  PARAMS ((void));
static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));

static void
gld${EMULATION_NAME}_before_parse()
{
  ldfile_output_architecture = bfd_arch_${ARCH};
  config.dynamic_link = true;
  config.has_shared = true;
}

/* Try to open a dynamic archive.  This is where we know that Linux
   dynamic libraries have an extension of .sa.  */

static boolean
gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
     const char *arch;
     search_dirs_type *search;
     lang_input_statement_type *entry;
{
  char *string;

  if (! entry->is_archive)
    return false;

  string = (char *) xmalloc (strlen (search->name)
			     + strlen (entry->filename)
			     + strlen (arch)
			     + sizeof "/lib.sa");

  sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch);

  if (! ldfile_try_open_bfd (string, entry))
    {
      free (string);
      return false;
    }

  entry->filename = string;

  return true;
}

/* This is called by the create_output_section_statements routine via
   lang_for_each_statement.  It locates any address assignment to
   .text, and modifies it to include the size of the headers.  This
   causes -Ttext to mean the starting address of the header, rather
   than the starting address of .text, which is compatible with other
   Linux tools.  */

static void
gld${EMULATION_NAME}_find_address_statement (s)
     lang_statement_union_type *s;
{
  if (s->header.type == lang_address_statement_enum
      && strcmp (s->address_statement.section_name, ".text") == 0)
    {
      ASSERT (s->address_statement.address->type.node_class == etree_value);
      s->address_statement.address->value.value += 0x20;
    }
}

/* This is called before opening the input BFD's.  */

static void
gld${EMULATION_NAME}_create_output_section_statements ()
{
  lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement);
}

/* This is called after the sections have been attached to output
   sections, but before any sizes or addresses have been set.  */

static void
gld${EMULATION_NAME}_before_allocation ()
{
  if (link_info.relocateable)
    return;

  /* Let the backend work out the sizes of any sections required by
     dynamic linking.  */
  if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info))
    einfo ("%P%F: failed to set dynamic section sizes: %E\n");
}

static char *
gld${EMULATION_NAME}_get_script(isfile)
     int *isfile;
EOF

if test -n "$COMPILE_IN"
then
# Scripts compiled in.

# sed commands to quote an ld script as a C string.
sc="-f stringify.sed"

cat >>e${EMULATION_NAME}.c <<EOF
{			     
  *isfile = 0;

  if (link_info.relocateable == true && config.build_constructors == true)
    return
EOF
sed $sc ldscripts/${EMULATION_NAME}.xu                     >> e${EMULATION_NAME}.c
echo '  ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xr                     >> e${EMULATION_NAME}.c
echo '  ; else if (!config.text_read_only) return'         >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xbn                    >> e${EMULATION_NAME}.c
echo '  ; else if (!config.magic_demand_paged) return'     >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xn                     >> e${EMULATION_NAME}.c
echo '  ; else return'                                     >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.x                      >> e${EMULATION_NAME}.c
echo '; }'                                                 >> e${EMULATION_NAME}.c

else
# Scripts read from the filesystem.

cat >>e${EMULATION_NAME}.c <<EOF
{			     
  *isfile = 1;

  if (link_info.relocateable == true && config.build_constructors == true)
    return "ldscripts/${EMULATION_NAME}.xu";
  else if (link_info.relocateable == true)
    return "ldscripts/${EMULATION_NAME}.xr";
  else if (!config.text_read_only)
    return "ldscripts/${EMULATION_NAME}.xbn";
  else if (!config.magic_demand_paged)
    return "ldscripts/${EMULATION_NAME}.xn";
  else
    return "ldscripts/${EMULATION_NAME}.x";
}
EOF

fi

cat >>e${EMULATION_NAME}.c <<EOF

struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 
{
  gld${EMULATION_NAME}_before_parse,
  syslib_default,
  hll_default,
  after_parse_default,
  after_open_default,
  after_allocation_default,
  set_output_arch_default,
  ldemul_default_target,
  gld${EMULATION_NAME}_before_allocation,
  gld${EMULATION_NAME}_get_script,
  "${EMULATION_NAME}",
  "${OUTPUT_FORMAT}",
  NULL,	/* finish */
  gld${EMULATION_NAME}_create_output_section_statements,
  gld${EMULATION_NAME}_open_dynamic_archive,
  NULL,	/* place orphan */
  NULL,	/* set symbols */
  NULL,	/* parse args */
  NULL,	/* unrecognized file */
  NULL,	/* list options */
  NULL,	/* recognized file */
  NULL 	/* find_potential_libraries */
};
EOF
Commit	Line	Data
252b5132 RH	1	# This shell script emits a C file. -- C --
	2	# It does some substitutions.
	3	cat >e${EMULATION_NAME}.c <<EOF
	4	/* This file is is generated by a shell script. DO NOT EDIT! */
	5
	6	/* Linux a.out emulation code for ${EMULATION_NAME}
597e2591	7	Copyright (C) 1991, 93, 94, 95, 96, 98, 1999 Free Software Foundation, Inc.
252b5132 RH	8	Written by Steve Chamberlain <sac@cygnus.com>
	9	Linux support by Eric Youngdale <ericy@cais.cais.com>
	10
	11	This file is part of GLD, the Gnu Linker.
	12
	13	This program is free software; you can redistribute it and/or modify
	14	it under the terms of the GNU General Public License as published by
	15	the Free Software Foundation; either version 2 of the License, or
	16	(at your option) any later version.
	17
	18	This program is distributed in the hope that it will be useful,
	19	but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	GNU General Public License for more details.
	22
	23	You should have received a copy of the GNU General Public License
	24	along with this program; if not, write to the Free Software
	25	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	26
	27	#define TARGET_IS_${EMULATION_NAME}
	28
	29	#include "bfd.h"
	30	#include "sysdep.h"
	31	#include "bfdlink.h"
	32
	33	#include "ld.h"
	34	#include "ldmain.h"
	35	#include "ldemul.h"
	36	#include "ldfile.h"
	37	#include "ldmisc.h"
	38	#include "ldexp.h"
	39	#include "ldlang.h"
	40
	41	static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
	42	static boolean gld${EMULATION_NAME}_open_dynamic_archive
	43	PARAMS ((const char , search_dirs_type , lang_input_statement_type *));
	44	static void gld${EMULATION_NAME}_find_address_statement
	45	PARAMS ((lang_statement_union_type *));
	46	static void gld${EMULATION_NAME}_create_output_section_statements
	47	PARAMS ((void));
	48	static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
	49	static char gld${EMULATION_NAME}_get_script PARAMS ((int isfile));
	50
	51	static void
	52	gld${EMULATION_NAME}_before_parse()
	53	{
	54	ldfile_output_architecture = bfd_arch_${ARCH};
	55	config.dynamic_link = true;
	56	config.has_shared = true;
	57	}
	58
	59	/* Try to open a dynamic archive. This is where we know that Linux
	60	dynamic libraries have an extension of .sa. */
	61
	62	static boolean
	63	gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry)
	64	const char *arch;
	65	search_dirs_type *search;
	66	lang_input_statement_type *entry;
	67	{
	68	char *string;
	69
	70	if (! entry->is_archive)
	71	return false;
72
73	string = (char *) xmalloc (strlen (search->name)
74	+ strlen (entry->filename)
75	+ strlen (arch)
76	+ sizeof "/lib.sa");
77
78	sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch);
79
80	if (! ldfile_try_open_bfd (string, entry))
81	{
82	free (string);
83	return false;
84	}
85
86	entry->filename = string;
87
88	return true;
89	}
90
91	/* This is called by the create_output_section_statements routine via
92	lang_for_each_statement. It locates any address assignment to
93	.text, and modifies it to include the size of the headers. This
94	causes -Ttext to mean the starting address of the header, rather
95	than the starting address of .text, which is compatible with other
96	Linux tools. */
97
98	static void
99	gld${EMULATION_NAME}_find_address_statement (s)
100	lang_statement_union_type *s;
101	{
102	if (s->header.type == lang_address_statement_enum
103	&& strcmp (s->address_statement.section_name, ".text") == 0)
104	{
105	ASSERT (s->address_statement.address->type.node_class == etree_value);
106	s->address_statement.address->value.value += 0x20;
107	}
108	}
109
110	/* This is called before opening the input BFD's. */
111
112	static void
113	gld${EMULATION_NAME}_create_output_section_statements ()
114	{
115	lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement);
116	}
117
118	/* This is called after the sections have been attached to output
119	sections, but before any sizes or addresses have been set. */
120
121	static void
122	gld${EMULATION_NAME}_before_allocation ()
123	{
124	if (link_info.relocateable)
125	return;
126
127	/* Let the backend work out the sizes of any sections required by
128	dynamic linking. */
129	if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info))
130	einfo ("%P%F: failed to set dynamic section sizes: %E\n");
131	}
132
133	static char *
134	gld${EMULATION_NAME}_get_script(isfile)
135	int *isfile;
136	EOF
137
138	if test -n "$COMPILE_IN"
139	then
140	# Scripts compiled in.
141
142	# sed commands to quote an ld script as a C string.
597e2591	143	sc="-f stringify.sed"
252b5132 RH	144
	145	cat >>e${EMULATION_NAME}.c <<EOF
	146	{
	147	*isfile = 0;
	148
	149	if (link_info.relocateable == true && config.build_constructors == true)
597e2591	150	return
252b5132	151	EOF
597e2591 ILT	152	sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
	153	echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
	154	sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
	155	echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
	156	sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
	157	echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
	158	sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
	159	echo ' ; else return' >> e${EMULATION_NAME}.c
	160	sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
	161	echo '; }' >> e${EMULATION_NAME}.c
252b5132 RH	162
	163	else
	164	# Scripts read from the filesystem.
	165
	166	cat >>e${EMULATION_NAME}.c <<EOF
	167	{
	168	*isfile = 1;
	169
	170	if (link_info.relocateable == true && config.build_constructors == true)
	171	return "ldscripts/${EMULATION_NAME}.xu";
	172	else if (link_info.relocateable == true)
	173	return "ldscripts/${EMULATION_NAME}.xr";
	174	else if (!config.text_read_only)
	175	return "ldscripts/${EMULATION_NAME}.xbn";
	176	else if (!config.magic_demand_paged)
	177	return "ldscripts/${EMULATION_NAME}.xn";
	178	else
	179	return "ldscripts/${EMULATION_NAME}.x";
	180	}
	181	EOF
	182
	183	fi
	184
	185	cat >>e${EMULATION_NAME}.c <<EOF
	186
	187	struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
	188	{
	189	gld${EMULATION_NAME}_before_parse,
	190	syslib_default,
	191	hll_default,
	192	after_parse_default,
	193	after_open_default,
	194	after_allocation_default,
	195	set_output_arch_default,
	196	ldemul_default_target,
	197	gld${EMULATION_NAME}_before_allocation,
	198	gld${EMULATION_NAME}_get_script,
	199	"${EMULATION_NAME}",
	200	"${OUTPUT_FORMAT}",
e1c47aa4	201	NULL, /* finish */
252b5132	202	gld${EMULATION_NAME}_create_output_section_statements,
49bdcdba	203	gld${EMULATION_NAME}_open_dynamic_archive,
e1c47aa4 AM	204	NULL, /* place orphan */
	205	NULL, /* set symbols */
	206	NULL, /* parse args */
	207	NULL, /* unrecognized file */
	208	NULL, /* list options */
40d109bf AM	209	NULL, /* recognized file */
40d109bf AM	210	NULL /* find_potential_libraries */
252b5132 RH	211	};
252b5132 RH	212	EOF