1# This shell script emits a C file. -*- C -*-
2# It does some substitutions.
3cat >e${EMULATION_NAME}.c <<EOF
4/* This file is is generated by a shell script.  DO NOT EDIT! */
5
6/* emulate the original gld for the given ${EMULATION_NAME}
7   Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
8   2004, 2005, 2007 Free Software Foundation, Inc.
9   Written by Steve Chamberlain steve@cygnus.com
10
11This file is part of GLD, the Gnu Linker.
12
13This program is free software; you can redistribute it and/or modify
14it under the terms of the GNU General Public License as published by
15the Free Software Foundation; either version 2 of the License, or
16(at your option) any later version.
17
18This program is distributed in the hope that it will be useful,
19but WITHOUT ANY WARRANTY; without even the implied warranty of
20MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21GNU General Public License for more details.
22
23You should have received a copy of the GNU General Public License
24along with this program; if not, write to the Free Software
25Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
26
27#define TARGET_IS_${EMULATION_NAME}
28
29#include "sysdep.h"
30#include "bfd.h"
31#include "bfdlink.h"
32#include "getopt.h"
33
34#include "ld.h"
35#include "ldmain.h"
36#include "ldmisc.h"
37
38#include "ldexp.h"
39#include "ldlang.h"
40#include "ldfile.h"
41#include "ldemul.h"
42
43/* If TRUE, then interworking stubs which support calls to old,
44   non-interworking aware ARM code should be generated.  */
45
46static int support_old_code = 0;
47static char * thumb_entry_symbol = NULL;
48
49#define OPTION_SUPPORT_OLD_CODE		300
50#define OPTION_THUMB_ENTRY		301
51
52static void
53gld${EMULATION_NAME}_add_options
54  (int ns ATTRIBUTE_UNUSED, char **shortopts ATTRIBUTE_UNUSED, int nl,
55   struct option **longopts, int nrl ATTRIBUTE_UNUSED,
56   struct option **really_longopts ATTRIBUTE_UNUSED)
57{
58  static const struct option xtra_long[] = {
59    {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
60    {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
61    {NULL, no_argument, NULL, 0}
62  };
63
64  *longopts = xrealloc (*longopts,
65			nl * sizeof (struct option) + sizeof (xtra_long));
66  memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
67}
68
69static void
70gld${EMULATION_NAME}_list_options (FILE *file)
71{
72  fprintf (file, _("  --support-old-code   Support interworking with old code\n"));
73  fprintf (file, _("  --thumb-entry=<sym>  Set the entry point to be Thumb symbol <sym>\n"));
74}
75
76static bfd_boolean
77gld${EMULATION_NAME}_handle_option (int optc)
78{
79  switch (optc)
80    {
81    default:
82      return FALSE;
83
84    case OPTION_SUPPORT_OLD_CODE:
85      support_old_code = 1;
86      break;
87
88    case OPTION_THUMB_ENTRY:
89      thumb_entry_symbol = optarg;
90      break;
91    }
92
93  return TRUE;
94}
95
96static void
97gld${EMULATION_NAME}_before_parse (void)
98{
99#ifndef TARGET_			/* I.e., if not generic.  */
100  ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
101#endif /* not TARGET_ */
102}
103
104/* This is called after the sections have been attached to output
105   sections, but before any sizes or addresses have been set.  */
106
107static void
108gld${EMULATION_NAME}_before_allocation (void)
109{
110  /* we should be able to set the size of the interworking stub section */
111
112  /* Here we rummage through the found bfds to collect glue information */
113  /* FIXME: should this be based on a command line option? krk@cygnus.com */
114  {
115    LANG_FOR_EACH_INPUT_STATEMENT (is)
116      {
117	if (! bfd_arm_process_before_allocation
118	    (is->the_bfd, & link_info, support_old_code))
119	  {
120	    /* xgettext:c-format */
121	    einfo (_("Errors encountered processing file %s"), is->filename);
122	  }
123      }
124  }
125
126  /* We have seen it all. Allocate it, and carry on */
127  bfd_arm_allocate_interworking_sections (& link_info);
128
129  before_allocation_default ();
130}
131
132static void
133gld${EMULATION_NAME}_after_open (void)
134{
135  if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
136    {
137      /* The arm backend needs special fields in the output hash structure.
138	 These will only be created if the output format is an arm format,
139	 hence we do not support linking and changing output formats at the
140	 same time.  Use a link followed by objcopy to change output formats.  */
141      einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
142      return;
143    }
144
145  {
146    LANG_FOR_EACH_INPUT_STATEMENT (is)
147      {
148	if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
149	  break;
150      }
151  }
152}
153
154static void
155gld${EMULATION_NAME}_finish (void)
156{
157  if (thumb_entry_symbol != NULL)
158    {
159      struct bfd_link_hash_entry * h;
160
161      h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
162				FALSE, FALSE, TRUE);
163
164      if (h != (struct bfd_link_hash_entry *) NULL
165	  && (h->type == bfd_link_hash_defined
166	      || h->type == bfd_link_hash_defweak)
167	  && h->u.def.section->output_section != NULL)
168	{
169	  static char buffer[32];
170	  bfd_vma val;
171
172	  /* Special procesing is required for a Thumb entry symbol.  The
173	     bottom bit of its address must be set.  */
174	  val = (h->u.def.value
175		 + bfd_get_section_vma (output_bfd,
176					h->u.def.section->output_section)
177		 + h->u.def.section->output_offset);
178
179	  val |= 1;
180
181	  /* Now convert this value into a string and store it in entry_symbol
182	     where the lang_finish() function will pick it up.  */
183	  buffer[0] = '0';
184	  buffer[1] = 'x';
185
186	  sprintf_vma (buffer + 2, val);
187
188	  if (entry_symbol.name != NULL && entry_from_cmdline)
189	    einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
190		   thumb_entry_symbol, entry_symbol.name);
191	  entry_symbol.name = buffer;
192	}
193      else
194	einfo (_("%P: warning: connot find thumb start symbol %s\n"),
195	       thumb_entry_symbol);
196    }
197
198  finish_default ();
199}
200
201static char *
202gld${EMULATION_NAME}_get_script (int *isfile)
203EOF
204
205if test -n "$COMPILE_IN"
206then
207# Scripts compiled in.
208
209# sed commands to quote an ld script as a C string.
210sc="-f stringify.sed"
211
212cat >>e${EMULATION_NAME}.c <<EOF
213{
214  *isfile = 0;
215
216  if (link_info.relocatable && config.build_constructors)
217    return
218EOF
219sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
220echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
221sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
222echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
223sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
224echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
225sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
226echo '  ; else return'                                 >> e${EMULATION_NAME}.c
227sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
228echo '; }'                                             >> e${EMULATION_NAME}.c
229
230else
231# Scripts read from the filesystem.
232
233cat >>e${EMULATION_NAME}.c <<EOF
234{
235  *isfile = 1;
236
237  if (link_info.relocatable && config.build_constructors)
238    return "ldscripts/${EMULATION_NAME}.xu";
239  else if (link_info.relocatable)
240    return "ldscripts/${EMULATION_NAME}.xr";
241  else if (!config.text_read_only)
242    return "ldscripts/${EMULATION_NAME}.xbn";
243  else if (!config.magic_demand_paged)
244    return "ldscripts/${EMULATION_NAME}.xn";
245  else
246    return "ldscripts/${EMULATION_NAME}.x";
247}
248EOF
249
250fi
251
252cat >>e${EMULATION_NAME}.c <<EOF
253
254struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
255{
256  gld${EMULATION_NAME}_before_parse,
257  syslib_default,
258  hll_default,
259  after_parse_default,
260  gld${EMULATION_NAME}_after_open,
261  after_allocation_default,
262  set_output_arch_default,
263  ldemul_default_target,
264  gld${EMULATION_NAME}_before_allocation,
265  gld${EMULATION_NAME}_get_script,
266  "${EMULATION_NAME}",
267  "${OUTPUT_FORMAT}",
268  gld${EMULATION_NAME}_finish,
269  NULL,	/* create output section statements */
270  NULL,	/* open dynamic archive */
271  NULL,	/* place orphan */
272  NULL,	/* set symbols */
273  NULL, /* parse_args */
274  gld${EMULATION_NAME}_add_options,
275  gld${EMULATION_NAME}_handle_option,
276  NULL,	/* unrecognised file */
277  gld${EMULATION_NAME}_list_options,
278  NULL,	/* recognized file */
279  NULL,	/* find_potential_libraries */
280  NULL	/* new_vers_pattern */
281};
282EOF
283