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! */
6 /* emulate the original gld for the given ${EMULATION_NAME}
7 Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
8 2004 Free Software Foundation, Inc.
9 Written by Steve Chamberlain steve@cygnus.com
11 This file is part of GLD, the Gnu Linker.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #define TARGET_IS_${EMULATION_NAME}
43 /* If TRUE, then interworking stubs which support calls to old,
44 non-interworking aware ARM code should be generated. */
46 static int support_old_code = 0;
47 static char * thumb_entry_symbol = NULL;
49 #define OPTION_SUPPORT_OLD_CODE 300
50 #define OPTION_THUMB_ENTRY 301
53 gld${EMULATION_NAME}_add_options
54 (int ns ATTRIBUTE_UNUSED, char **shortopts ATTRIBUTE_UNUSED, int nl,
55 struct option **longopts, int nrl ATTRIBUTE_UNUSED,
56 struct option **really_longopts ATTRIBUTE_UNUSED)
58 static const struct option xtra_long[] = {
59 {"support-old-code", no_argument, NULL, OPTION_SUPPORT_OLD_CODE},
60 {"thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
61 {NULL, no_argument, NULL, 0}
64 *longopts = xrealloc (*longopts,
65 nl * sizeof (struct option) + sizeof (xtra_long));
66 memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
70 gld${EMULATION_NAME}_list_options (FILE *file)
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"));
77 gld${EMULATION_NAME}_handle_option (int optc)
84 case OPTION_SUPPORT_OLD_CODE:
88 case OPTION_THUMB_ENTRY:
89 thumb_entry_symbol = optarg;
97 gld${EMULATION_NAME}_before_parse (void)
99 #ifndef TARGET_ /* I.e., if not generic. */
100 ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
101 #endif /* not TARGET_ */
104 /* This is called after the sections have been attached to output
105 sections, but before any sizes or addresses have been set. */
108 gld${EMULATION_NAME}_before_allocation (void)
110 /* we should be able to set the size of the interworking stub section */
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 */
115 LANG_FOR_EACH_INPUT_STATEMENT (is)
117 if (! bfd_arm_process_before_allocation
118 (is->the_bfd, & link_info, support_old_code))
120 /* xgettext:c-format */
121 einfo (_("Errors encountered processing file %s"), is->filename);
126 /* We have seen it all. Allocate it, and carry on */
127 bfd_arm_allocate_interworking_sections (& link_info);
131 gld${EMULATION_NAME}_after_open (void)
133 if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
135 /* The arm backend needs special fields in the output hash structure.
136 These will only be created if the output format is an arm format,
137 hence we do not support linking and changing output formats at the
138 same time. Use a link followed by objcopy to change output formats. */
139 einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
144 LANG_FOR_EACH_INPUT_STATEMENT (is)
146 if (bfd_arm_get_bfd_for_interworking (is->the_bfd, & link_info))
153 gld${EMULATION_NAME}_finish (void)
155 struct bfd_link_hash_entry * h;
157 if (thumb_entry_symbol == NULL)
160 h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
163 if (h != (struct bfd_link_hash_entry *) NULL
164 && (h->type == bfd_link_hash_defined
165 || h->type == bfd_link_hash_defweak)
166 && h->u.def.section->output_section != NULL)
168 static char buffer[32];
171 /* Special procesing is required for a Thumb entry symbol. The
172 bottom bit of its address must be set. */
173 val = (h->u.def.value
174 + bfd_get_section_vma (output_bfd,
175 h->u.def.section->output_section)
176 + h->u.def.section->output_offset);
180 /* Now convert this value into a string and store it in entry_symbol
181 where the lang_finish() function will pick it up. */
185 sprintf_vma (buffer + 2, val);
187 if (entry_symbol.name != NULL && entry_from_cmdline)
188 einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
189 thumb_entry_symbol, entry_symbol.name);
190 entry_symbol.name = buffer;
193 einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol);
197 gld${EMULATION_NAME}_get_script (int *isfile)
200 if test -n "$COMPILE_IN"
202 # Scripts compiled in.
204 # sed commands to quote an ld script as a C string.
205 sc="-f stringify.sed"
207 cat >>e${EMULATION_NAME}.c <<EOF
211 if (link_info.relocatable && config.build_constructors)
214 sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
215 echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
216 sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
217 echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
218 sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
219 echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
220 sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
221 echo ' ; else return' >> e${EMULATION_NAME}.c
222 sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
223 echo '; }' >> e${EMULATION_NAME}.c
226 # Scripts read from the filesystem.
228 cat >>e${EMULATION_NAME}.c <<EOF
232 if (link_info.relocatable && config.build_constructors)
233 return "ldscripts/${EMULATION_NAME}.xu";
234 else if (link_info.relocatable)
235 return "ldscripts/${EMULATION_NAME}.xr";
236 else if (!config.text_read_only)
237 return "ldscripts/${EMULATION_NAME}.xbn";
238 else if (!config.magic_demand_paged)
239 return "ldscripts/${EMULATION_NAME}.xn";
241 return "ldscripts/${EMULATION_NAME}.x";
247 cat >>e${EMULATION_NAME}.c <<EOF
249 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
251 gld${EMULATION_NAME}_before_parse,
255 gld${EMULATION_NAME}_after_open,
256 after_allocation_default,
257 set_output_arch_default,
258 ldemul_default_target,
259 gld${EMULATION_NAME}_before_allocation,
260 gld${EMULATION_NAME}_get_script,
263 gld${EMULATION_NAME}_finish,
264 NULL, /* create output section statements */
265 NULL, /* open dynamic archive */
266 NULL, /* place orphan */
267 NULL, /* set symbols */
268 NULL, /* parse_args */
269 gld${EMULATION_NAME}_add_options,
270 gld${EMULATION_NAME}_handle_option,
271 NULL, /* unrecognised file */
272 gld${EMULATION_NAME}_list_options,
273 NULL, /* recognized file */
274 NULL, /* find_potential_libraries */
275 NULL /* new_vers_pattern */