1 # This shell script emits a C file. -*- C -*-
2 # Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 # Free Software Foundation, Inc.
6 # This file is part of GLD, the Gnu Linker.
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2 of the License, or
11 # (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write to the Free Software
20 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
23 # This file is sourced from elf32.em, and defines extra arm-elf
26 test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel"
27 cat >>e${EMULATION_NAME}.c <<EOF
31 static char *thumb_entry_symbol = NULL;
32 static bfd *bfd_for_interwork;
33 static int byteswap_code = 0;
34 static int target1_is_rel = 0${TARGET1_IS_REL};
35 static char *target2_type = "${TARGET2_TYPE}";
36 static int fix_v4bx = 0;
37 static int use_blx = 0;
38 static bfd_arm_vfp11_fix vfp11_denorm_fix = BFD_ARM_VFP11_FIX_DEFAULT;
39 static int no_enum_size_warning = 0;
42 gld${EMULATION_NAME}_before_parse (void)
44 #ifndef TARGET_ /* I.e., if not generic. */
45 ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
46 #endif /* not TARGET_ */
47 config.dynamic_link = ${DYNAMIC_LINK-TRUE};
48 config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
52 arm_elf_after_open (void)
54 if (strstr (bfd_get_target (output_bfd), "arm") == NULL)
56 /* The arm backend needs special fields in the output hash structure.
57 These will only be created if the output format is an arm format,
58 hence we do not support linking and changing output formats at the
59 same time. Use a link followed by objcopy to change output formats. */
60 einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
65 LANG_FOR_EACH_INPUT_STATEMENT (is)
67 bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info);
71 /* Call the standard elf routine. */
72 gld${EMULATION_NAME}_after_open ();
76 arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement)
78 if (statement->header.type == lang_input_section_enum)
80 asection *i = statement->input_section.section;
82 if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
83 && (i->flags & SEC_EXCLUDE) == 0)
85 asection *output_section = i->output_section;
87 ASSERT (output_section->owner == output_bfd);
89 /* Don't attach the interworking stubs to a dynamic object, to
90 an empty section, etc. */
91 if ((output_section->flags & SEC_HAS_CONTENTS) != 0
92 && (i->flags & SEC_NEVER_LOAD) == 0
93 && ! (i->owner->flags & DYNAMIC)
94 && ! i->owner->output_has_begun)
96 bfd_for_interwork = i->owner;
97 bfd_for_interwork->output_has_begun = TRUE;
104 arm_elf_before_allocation (void)
108 if (link_info.input_bfds != NULL)
110 /* The interworking bfd must be the last one in the link. */
111 bfd_for_interwork = NULL;
112 for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next)
113 tem->output_has_begun = FALSE;
115 lang_for_each_statement (arm_elf_set_bfd_for_interworking);
116 for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next)
117 tem->output_has_begun = FALSE;
119 /* If bfd_for_interwork is NULL, then there are no loadable sections
120 with real contents to be linked, so we are not going to have to
121 create any interworking stubs, so it is OK not to call
122 bfd_elf32_arm_get_bfd_for_interworking. */
123 if (bfd_for_interwork != NULL)
124 bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info);
127 bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code);
129 /* Choose type of VFP11 erratum fix, or warn if specified fix is unnecessary
130 due to architecture version. */
131 bfd_elf32_arm_set_vfp11_fix (output_bfd, &link_info);
133 /* We should be able to set the size of the interworking stub section. We
134 can't do it until later if we have dynamic sections, though. */
135 if (! elf_hash_table (&link_info)->dynamic_sections_created)
137 /* Here we rummage through the found bfds to collect glue information. */
138 LANG_FOR_EACH_INPUT_STATEMENT (is)
140 /* Initialise mapping tables for code/data. */
141 bfd_elf32_arm_init_maps (is->the_bfd);
143 if (!bfd_elf32_arm_process_before_allocation (is->the_bfd,
145 || !bfd_elf32_arm_vfp11_erratum_scan (is->the_bfd, &link_info))
146 /* xgettext:c-format */
147 einfo (_("Errors encountered processing file %s"), is->filename);
151 /* Call the standard elf routine. */
152 gld${EMULATION_NAME}_before_allocation ();
154 /* We have seen it all. Allocate it, and carry on. */
155 bfd_elf32_arm_allocate_interworking_sections (& link_info);
159 arm_elf_after_allocation (void)
161 /* Call the standard elf routine. */
162 after_allocation_default ();
165 LANG_FOR_EACH_INPUT_STATEMENT (is)
167 /* Figure out where VFP11 erratum veneers (and the labels returning
168 from same) have been placed. */
169 bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info);
175 arm_elf_finish (void)
177 struct bfd_link_hash_entry * h;
179 /* Call the elf32.em routine. */
180 gld${EMULATION_NAME}_finish ();
182 if (thumb_entry_symbol)
184 h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
189 struct elf_link_hash_entry * eh;
191 if (!entry_symbol.name)
194 h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
196 eh = (struct elf_link_hash_entry *)h;
197 if (!h || ELF_ST_TYPE(eh->type) != STT_ARM_TFUNC)
202 if (h != (struct bfd_link_hash_entry *) NULL
203 && (h->type == bfd_link_hash_defined
204 || h->type == bfd_link_hash_defweak)
205 && h->u.def.section->output_section != NULL)
207 static char buffer[32];
210 /* Special procesing is required for a Thumb entry symbol. The
211 bottom bit of its address must be set. */
212 val = (h->u.def.value
213 + bfd_get_section_vma (output_bfd,
214 h->u.def.section->output_section)
215 + h->u.def.section->output_offset);
219 /* Now convert this value into a string and store it in entry_symbol
220 where the lang_finish() function will pick it up. */
224 sprintf_vma (buffer + 2, val);
226 if (thumb_entry_symbol != NULL && entry_symbol.name != NULL
227 && entry_from_cmdline)
228 einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
229 thumb_entry_symbol, entry_symbol.name);
230 entry_symbol.name = buffer;
233 einfo (_("%P: warning: connot find thumb start symbol %s\n"),
237 /* This is a convenient point to tell BFD about target specific flags.
238 After the output has been created, but before inputs are read. */
240 arm_elf_create_output_section_statements (void)
242 bfd_elf32_arm_set_target_relocs (output_bfd, &link_info, target1_is_rel,
243 target2_type, fix_v4bx, use_blx,
244 vfp11_denorm_fix, no_enum_size_warning);
249 # Define some shell vars to insert bits of code into the standard elf
250 # parse_args and list_options functions.
252 PARSE_AND_LIST_PROLOGUE='
253 #define OPTION_THUMB_ENTRY 301
254 #define OPTION_BE8 302
255 #define OPTION_TARGET1_REL 303
256 #define OPTION_TARGET1_ABS 304
257 #define OPTION_TARGET2 305
258 #define OPTION_FIX_V4BX 306
259 #define OPTION_USE_BLX 307
260 #define OPTION_VFP11_DENORM_FIX 308
261 #define OPTION_NO_ENUM_SIZE_WARNING 309
264 PARSE_AND_LIST_SHORTOPTS=p
266 PARSE_AND_LIST_LONGOPTS='
267 { "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
268 { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
269 { "be8", no_argument, NULL, OPTION_BE8},
270 { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL},
271 { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS},
272 { "target2", required_argument, NULL, OPTION_TARGET2},
273 { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX},
274 { "use-blx", no_argument, NULL, OPTION_USE_BLX},
275 { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX},
276 { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
279 PARSE_AND_LIST_OPTIONS='
280 fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n"));
281 fprintf (file, _(" --be8 Oputput BE8 format image\n"));
282 fprintf (file, _(" --target1=rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n"));
283 fprintf (file, _(" --target1=abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
284 fprintf (file, _(" --target2=<type> Specify definition of R_ARM_TARGET2\n"));
285 fprintf (file, _(" --fix-v4bx Rewrite BX rn as MOV pc, rn for ARMv4\n"));
286 fprintf (file, _(" --use-blx Enable use of BLX instructions\n"));
287 fprintf (file, _(" --vfp11-denorm-fix Specify how to fix VFP11 denorm erratum\n"));
288 fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible enum sizes\n"));
291 PARSE_AND_LIST_ARGS_CASES='
293 /* Only here for backwards compatibility. */
296 case OPTION_THUMB_ENTRY:
297 thumb_entry_symbol = optarg;
304 case OPTION_TARGET1_REL:
308 case OPTION_TARGET1_ABS:
313 target2_type = optarg;
316 case OPTION_FIX_V4BX:
324 case OPTION_VFP11_DENORM_FIX:
325 if (strcmp (optarg, "none") == 0)
326 vfp11_denorm_fix = BFD_ARM_VFP11_FIX_NONE;
327 else if (strcmp (optarg, "scalar") == 0)
328 vfp11_denorm_fix = BFD_ARM_VFP11_FIX_SCALAR;
329 else if (strcmp (optarg, "vector") == 0)
330 vfp11_denorm_fix = BFD_ARM_VFP11_FIX_VECTOR;
332 einfo (_("Unrecognized VFP11 fix type '\''%s'\''.\n"), optarg);
335 case OPTION_NO_ENUM_SIZE_WARNING:
336 no_enum_size_warning = 1;
340 # We have our own after_open and before_allocation functions, but they call
341 # the standard routines, so give them a different name.
342 LDEMUL_AFTER_OPEN=arm_elf_after_open
343 LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation
344 LDEMUL_AFTER_ALLOCATION=arm_elf_after_allocation
345 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements
347 # Replace the elf before_parse function with our own.
348 LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
350 # Call the extra arm-elf function
351 LDEMUL_FINISH=arm_elf_finish