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 ${EMULATION_NAME}
7   Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
8   2004, 2005 Free Software Foundation, Inc.
9   Written by Steve Chamberlain steve@cygnus.com
10
11This file is part of GLD, the Gnu Linker.
12
13This program is free software; you can redistribute it and/or modify
14it under the terms of the GNU General Public License as published by
15the Free Software Foundation; either version 2 of the License, or
16(at your option) any later version.
17
18This program is distributed in the hope that it will be useful,
19but WITHOUT ANY WARRANTY; without even the implied warranty of
20MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21GNU General Public License for more details.
22
23You should have received a copy of the GNU General Public License
24along with this program; if not, write to the Free Software
25Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
26
27#define TARGET_IS_${EMULATION_NAME}
28
29#include "bfd.h"
30#include "sysdep.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  struct bfd_link_hash_entry * h;
158
159  if (thumb_entry_symbol == NULL)
160    return;
161
162  h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
163			    FALSE, FALSE, TRUE);
164
165  if (h != (struct bfd_link_hash_entry *) NULL
166      && (h->type == bfd_link_hash_defined
167	  || h->type == bfd_link_hash_defweak)
168      && h->u.def.section->output_section != NULL)
169    {
170      static char buffer[32];
171      bfd_vma val;
172
173      /* Special procesing is required for a Thumb entry symbol.  The
174	 bottom bit of its address must be set.  */
175      val = (h->u.def.value
176	     + bfd_get_section_vma (output_bfd,
177				    h->u.def.section->output_section)
178	     + h->u.def.section->output_offset);
179
180      val |= 1;
181
182      /* Now convert this value into a string and store it in entry_symbol
183	 where the lang_finish() function will pick it up.  */
184      buffer[0] = '0';
185      buffer[1] = 'x';
186
187      sprintf_vma (buffer + 2, val);
188
189      if (entry_symbol.name != NULL && entry_from_cmdline)
190	einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
191	       thumb_entry_symbol, entry_symbol.name);
192      entry_symbol.name = buffer;
193    }
194  else
195    einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
196
197  finish_default ();
198}
199
200static char *
201gld${EMULATION_NAME}_get_script (int *isfile)
202EOF
203
204if test -n "$COMPILE_IN"
205then
206# Scripts compiled in.
207
208# sed commands to quote an ld script as a C string.
209sc="-f stringify.sed"
210
211cat >>e${EMULATION_NAME}.c <<EOF
212{
213  *isfile = 0;
214
215  if (link_info.relocatable && config.build_constructors)
216    return
217EOF
218sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
219echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
220sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
221echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
222sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
223echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
224sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
225echo '  ; else return'                                 >> e${EMULATION_NAME}.c
226sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
227echo '; }'                                             >> e${EMULATION_NAME}.c
228
229else
230# Scripts read from the filesystem.
231
232cat >>e${EMULATION_NAME}.c <<EOF
233{
234  *isfile = 1;
235
236  if (link_info.relocatable && config.build_constructors)
237    return "ldscripts/${EMULATION_NAME}.xu";
238  else if (link_info.relocatable)
239    return "ldscripts/${EMULATION_NAME}.xr";
240  else if (!config.text_read_only)
241    return "ldscripts/${EMULATION_NAME}.xbn";
242  else if (!config.magic_demand_paged)
243    return "ldscripts/${EMULATION_NAME}.xn";
244  else
245    return "ldscripts/${EMULATION_NAME}.x";
246}
247EOF
248
249fi
250
251cat >>e${EMULATION_NAME}.c <<EOF
252
253struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
254{
255  gld${EMULATION_NAME}_before_parse,
256  syslib_default,
257  hll_default,
258  after_parse_default,
259  gld${EMULATION_NAME}_after_open,
260  after_allocation_default,
261  set_output_arch_default,
262  ldemul_default_target,
263  gld${EMULATION_NAME}_before_allocation,
264  gld${EMULATION_NAME}_get_script,
265  "${EMULATION_NAME}",
266  "${OUTPUT_FORMAT}",
267  gld${EMULATION_NAME}_finish,
268  NULL,	/* create output section statements */
269  NULL,	/* open dynamic archive */
270  NULL,	/* place orphan */
271  NULL,	/* set symbols */
272  NULL, /* parse_args */
273  gld${EMULATION_NAME}_add_options,
274  gld${EMULATION_NAME}_handle_option,
275  NULL,	/* unrecognised file */
276  gld${EMULATION_NAME}_list_options,
277  NULL,	/* recognized file */
278  NULL,	/* find_potential_libraries */
279  NULL	/* new_vers_pattern */
280};
281EOF
282