Commit | Line | Data |
---|---|---|
252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
aef6203b AM |
2 | # Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
3 | # 2004, 2005 | |
41392f03 AM |
4 | # Free Software Foundation, Inc. |
5 | # | |
6 | # This file is part of GLD, the Gnu Linker. | |
7 | # | |
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. | |
12 | # | |
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. | |
17 | # | |
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 | |
75be928b | 20 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
41392f03 AM |
21 | # |
22 | ||
23 | # This file is sourced from elf32.em, and defines extra arm-elf | |
24 | # specific routines. | |
25 | # | |
a82644e2 | 26 | test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel" |
41392f03 | 27 | cat >>e${EMULATION_NAME}.c <<EOF |
7ca69e9e | 28 | |
1d022697 PB |
29 | #include "elf/arm.h" |
30 | ||
88f7bcd5 NC |
31 | static char *thumb_entry_symbol = NULL; |
32 | static bfd *bfd_for_interwork; | |
e489d0ae | 33 | static int byteswap_code = 0; |
9c504268 | 34 | static int target1_is_rel = 0${TARGET1_IS_REL}; |
3674e28a | 35 | static char *target2_type = "${TARGET2_TYPE}"; |
319850b4 | 36 | static int fix_v4bx = 0; |
33bfe774 | 37 | static int use_blx = 0; |
c6dd86c6 | 38 | static bfd_arm_vfp11_fix vfp11_denorm_fix = BFD_ARM_VFP11_FIX_DEFAULT; |
bf21ed78 | 39 | static int no_enum_size_warning = 0; |
27e55c4d | 40 | static int pic_veneer = 0; |
7ca69e9e | 41 | |
252b5132 | 42 | static void |
0c7a8e5a | 43 | gld${EMULATION_NAME}_before_parse (void) |
252b5132 RH |
44 | { |
45 | #ifndef TARGET_ /* I.e., if not generic. */ | |
5e2f1575 | 46 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
252b5132 | 47 | #endif /* not TARGET_ */ |
b34976b6 AM |
48 | config.dynamic_link = ${DYNAMIC_LINK-TRUE}; |
49 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`; | |
252b5132 RH |
50 | } |
51 | ||
1220a729 | 52 | static void |
0c7a8e5a | 53 | arm_elf_after_open (void) |
1220a729 | 54 | { |
f11523b0 | 55 | if (strstr (bfd_get_target (output_bfd), "arm") == NULL) |
1220a729 | 56 | { |
f11523b0 NC |
57 | /* The arm backend needs special fields in the output hash structure. |
58 | These will only be created if the output format is an arm format, | |
59 | hence we do not support linking and changing output formats at the | |
60 | same time. Use a link followed by objcopy to change output formats. */ | |
61 | einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n"); | |
62 | return; | |
1220a729 NC |
63 | } |
64 | ||
f11523b0 NC |
65 | { |
66 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
67 | { | |
8afb0e02 | 68 | bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info); |
f11523b0 NC |
69 | } |
70 | } | |
71 | ||
41392f03 AM |
72 | /* Call the standard elf routine. */ |
73 | gld${EMULATION_NAME}_after_open (); | |
1220a729 NC |
74 | } |
75 | ||
8afb0e02 | 76 | static void |
0c7a8e5a | 77 | arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement) |
8afb0e02 | 78 | { |
7b986e99 | 79 | if (statement->header.type == lang_input_section_enum) |
8afb0e02 | 80 | { |
88f7bcd5 | 81 | asection *i = statement->input_section.section; |
8afb0e02 | 82 | |
7b986e99 AM |
83 | if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag |
84 | && (i->flags & SEC_EXCLUDE) == 0) | |
8afb0e02 | 85 | { |
7b986e99 AM |
86 | asection *output_section = i->output_section; |
87 | ||
88 | ASSERT (output_section->owner == output_bfd); | |
89 | ||
90 | /* Don't attach the interworking stubs to a dynamic object, to | |
91 | an empty section, etc. */ | |
92 | if ((output_section->flags & SEC_HAS_CONTENTS) != 0 | |
93 | && (i->flags & SEC_NEVER_LOAD) == 0 | |
94 | && ! (i->owner->flags & DYNAMIC) | |
95 | && ! i->owner->output_has_begun) | |
96 | { | |
97 | bfd_for_interwork = i->owner; | |
98 | bfd_for_interwork->output_has_begun = TRUE; | |
99 | } | |
8afb0e02 NC |
100 | } |
101 | } | |
102 | } | |
1220a729 | 103 | |
1220a729 | 104 | static void |
0c7a8e5a | 105 | arm_elf_before_allocation (void) |
1220a729 | 106 | { |
88f7bcd5 | 107 | bfd *tem; |
8afb0e02 | 108 | |
2004afbc NC |
109 | if (link_info.input_bfds != NULL) |
110 | { | |
111 | /* The interworking bfd must be the last one in the link. */ | |
112 | bfd_for_interwork = NULL; | |
113 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) | |
b34976b6 | 114 | tem->output_has_begun = FALSE; |
252b5132 | 115 | |
2004afbc | 116 | lang_for_each_statement (arm_elf_set_bfd_for_interworking); |
2004afbc | 117 | for (tem = link_info.input_bfds; tem != NULL; tem = tem->link_next) |
b34976b6 | 118 | tem->output_has_begun = FALSE; |
8afb0e02 | 119 | |
06aa7234 NC |
120 | /* If bfd_for_interwork is NULL, then there are no loadable sections |
121 | with real contents to be linked, so we are not going to have to | |
122 | create any interworking stubs, so it is OK not to call | |
123 | bfd_elf32_arm_get_bfd_for_interworking. */ | |
124 | if (bfd_for_interwork != NULL) | |
125 | bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info); | |
2004afbc | 126 | } |
8afb0e02 | 127 | |
d504ffc8 DJ |
128 | bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code); |
129 | ||
c6dd86c6 JB |
130 | /* Choose type of VFP11 erratum fix, or warn if specified fix is unnecessary |
131 | due to architecture version. */ | |
132 | bfd_elf32_arm_set_vfp11_fix (output_bfd, &link_info); | |
133 | ||
d504ffc8 DJ |
134 | /* We should be able to set the size of the interworking stub section. We |
135 | can't do it until later if we have dynamic sections, though. */ | |
136 | if (! elf_hash_table (&link_info)->dynamic_sections_created) | |
137 | { | |
138 | /* Here we rummage through the found bfds to collect glue information. */ | |
139 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
140 | { | |
c6dd86c6 JB |
141 | /* Initialise mapping tables for code/data. */ |
142 | bfd_elf32_arm_init_maps (is->the_bfd); | |
143 | ||
d504ffc8 | 144 | if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, |
c6dd86c6 JB |
145 | &link_info) |
146 | || !bfd_elf32_arm_vfp11_erratum_scan (is->the_bfd, &link_info)) | |
252b5132 RH |
147 | /* xgettext:c-format */ |
148 | einfo (_("Errors encountered processing file %s"), is->filename); | |
d504ffc8 DJ |
149 | } |
150 | } | |
252b5132 | 151 | |
063d4ee1 AM |
152 | /* Call the standard elf routine. */ |
153 | gld${EMULATION_NAME}_before_allocation (); | |
154 | ||
8afb0e02 | 155 | /* We have seen it all. Allocate it, and carry on. */ |
252b5132 RH |
156 | bfd_elf32_arm_allocate_interworking_sections (& link_info); |
157 | } | |
158 | ||
c6dd86c6 JB |
159 | static void |
160 | arm_elf_after_allocation (void) | |
161 | { | |
162 | /* Call the standard elf routine. */ | |
163 | after_allocation_default (); | |
164 | ||
165 | { | |
166 | LANG_FOR_EACH_INPUT_STATEMENT (is) | |
167 | { | |
168 | /* Figure out where VFP11 erratum veneers (and the labels returning | |
169 | from same) have been placed. */ | |
170 | bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info); | |
171 | } | |
172 | } | |
173 | } | |
174 | ||
6f798e5c | 175 | static void |
0c7a8e5a | 176 | arm_elf_finish (void) |
6f798e5c NC |
177 | { |
178 | struct bfd_link_hash_entry * h; | |
179 | ||
c56feb2b AM |
180 | /* Call the elf32.em routine. */ |
181 | gld${EMULATION_NAME}_finish (); | |
182 | ||
1d022697 PB |
183 | if (thumb_entry_symbol) |
184 | { | |
185 | h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, | |
186 | FALSE, FALSE, TRUE); | |
187 | } | |
188 | else | |
189 | { | |
190 | struct elf_link_hash_entry * eh; | |
191 | ||
192 | if (!entry_symbol.name) | |
193 | return; | |
194 | ||
195 | h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name, | |
196 | FALSE, FALSE, TRUE); | |
197 | eh = (struct elf_link_hash_entry *)h; | |
198 | if (!h || ELF_ST_TYPE(eh->type) != STT_ARM_TFUNC) | |
199 | return; | |
200 | } | |
0c7a8e5a | 201 | |
6f798e5c NC |
202 | |
203 | if (h != (struct bfd_link_hash_entry *) NULL | |
204 | && (h->type == bfd_link_hash_defined | |
205 | || h->type == bfd_link_hash_defweak) | |
206 | && h->u.def.section->output_section != NULL) | |
207 | { | |
208 | static char buffer[32]; | |
88f7bcd5 | 209 | bfd_vma val; |
0c7a8e5a | 210 | |
88f7bcd5 NC |
211 | /* Special procesing is required for a Thumb entry symbol. The |
212 | bottom bit of its address must be set. */ | |
213 | val = (h->u.def.value | |
214 | + bfd_get_section_vma (output_bfd, | |
215 | h->u.def.section->output_section) | |
216 | + h->u.def.section->output_offset); | |
0c7a8e5a | 217 | |
88f7bcd5 | 218 | val |= 1; |
6f798e5c | 219 | |
88f7bcd5 | 220 | /* Now convert this value into a string and store it in entry_symbol |
0c7a8e5a | 221 | where the lang_finish() function will pick it up. */ |
88f7bcd5 NC |
222 | buffer[0] = '0'; |
223 | buffer[1] = 'x'; | |
0c7a8e5a | 224 | |
88f7bcd5 | 225 | sprintf_vma (buffer + 2, val); |
6f798e5c | 226 | |
1d022697 PB |
227 | if (thumb_entry_symbol != NULL && entry_symbol.name != NULL |
228 | && entry_from_cmdline) | |
88f7bcd5 NC |
229 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), |
230 | thumb_entry_symbol, entry_symbol.name); | |
231 | entry_symbol.name = buffer; | |
6f798e5c | 232 | } |
88f7bcd5 NC |
233 | else |
234 | einfo (_("%P: warning: connot find thumb start symbol %s\n"), | |
235 | thumb_entry_symbol); | |
6f798e5c NC |
236 | } |
237 | ||
bf21ed78 | 238 | /* This is a convenient point to tell BFD about target specific flags. |
3674e28a PB |
239 | After the output has been created, but before inputs are read. */ |
240 | static void | |
241 | arm_elf_create_output_section_statements (void) | |
242 | { | |
bf21ed78 MS |
243 | bfd_elf32_arm_set_target_relocs (output_bfd, &link_info, target1_is_rel, |
244 | target2_type, fix_v4bx, use_blx, | |
27e55c4d PB |
245 | vfp11_denorm_fix, no_enum_size_warning, |
246 | pic_veneer); | |
3674e28a PB |
247 | } |
248 | ||
252b5132 RH |
249 | EOF |
250 | ||
41392f03 AM |
251 | # Define some shell vars to insert bits of code into the standard elf |
252 | # parse_args and list_options functions. | |
253 | # | |
254 | PARSE_AND_LIST_PROLOGUE=' | |
255 | #define OPTION_THUMB_ENTRY 301 | |
e489d0ae | 256 | #define OPTION_BE8 302 |
9c504268 PB |
257 | #define OPTION_TARGET1_REL 303 |
258 | #define OPTION_TARGET1_ABS 304 | |
3674e28a | 259 | #define OPTION_TARGET2 305 |
33bfe774 JB |
260 | #define OPTION_FIX_V4BX 306 |
261 | #define OPTION_USE_BLX 307 | |
c6dd86c6 | 262 | #define OPTION_VFP11_DENORM_FIX 308 |
bf21ed78 | 263 | #define OPTION_NO_ENUM_SIZE_WARNING 309 |
27e55c4d | 264 | #define OPTION_PIC_VENEER 310 |
41392f03 | 265 | ' |
252b5132 | 266 | |
ef5bdbd1 | 267 | PARSE_AND_LIST_SHORTOPTS=p |
252b5132 | 268 | |
41392f03 AM |
269 | PARSE_AND_LIST_LONGOPTS=' |
270 | { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, | |
271 | { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, | |
e489d0ae | 272 | { "be8", no_argument, NULL, OPTION_BE8}, |
9c504268 PB |
273 | { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL}, |
274 | { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS}, | |
3674e28a | 275 | { "target2", required_argument, NULL, OPTION_TARGET2}, |
319850b4 | 276 | { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX}, |
33bfe774 | 277 | { "use-blx", no_argument, NULL, OPTION_USE_BLX}, |
c6dd86c6 | 278 | { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX}, |
bf21ed78 | 279 | { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING}, |
27e55c4d | 280 | { "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER}, |
41392f03 | 281 | ' |
252b5132 | 282 | |
41392f03 | 283 | PARSE_AND_LIST_OPTIONS=' |
41392f03 | 284 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); |
e489d0ae | 285 | fprintf (file, _(" --be8 Oputput BE8 format image\n")); |
3674e28a PB |
286 | fprintf (file, _(" --target1=rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n")); |
287 | fprintf (file, _(" --target1=abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n")); | |
288 | fprintf (file, _(" --target2=<type> Specify definition of R_ARM_TARGET2\n")); | |
319850b4 | 289 | fprintf (file, _(" --fix-v4bx Rewrite BX rn as MOV pc, rn for ARMv4\n")); |
33bfe774 | 290 | fprintf (file, _(" --use-blx Enable use of BLX instructions\n")); |
c6dd86c6 | 291 | fprintf (file, _(" --vfp11-denorm-fix Specify how to fix VFP11 denorm erratum\n")); |
bf21ed78 | 292 | fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible enum sizes\n")); |
27e55c4d | 293 | fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n")); |
41392f03 | 294 | ' |
252b5132 | 295 | |
41392f03 AM |
296 | PARSE_AND_LIST_ARGS_CASES=' |
297 | case '\'p\'': | |
dea514f5 | 298 | /* Only here for backwards compatibility. */ |
41392f03 | 299 | break; |
252b5132 | 300 | |
41392f03 AM |
301 | case OPTION_THUMB_ENTRY: |
302 | thumb_entry_symbol = optarg; | |
303 | break; | |
e489d0ae PB |
304 | |
305 | case OPTION_BE8: | |
306 | byteswap_code = 1; | |
307 | break; | |
9c504268 PB |
308 | |
309 | case OPTION_TARGET1_REL: | |
310 | target1_is_rel = 1; | |
311 | break; | |
312 | ||
313 | case OPTION_TARGET1_ABS: | |
314 | target1_is_rel = 0; | |
315 | break; | |
3674e28a PB |
316 | |
317 | case OPTION_TARGET2: | |
318 | target2_type = optarg; | |
319 | break; | |
319850b4 JB |
320 | |
321 | case OPTION_FIX_V4BX: | |
322 | fix_v4bx = 1; | |
323 | break; | |
33bfe774 JB |
324 | |
325 | case OPTION_USE_BLX: | |
326 | use_blx = 1; | |
327 | break; | |
c6dd86c6 JB |
328 | |
329 | case OPTION_VFP11_DENORM_FIX: | |
330 | if (strcmp (optarg, "none") == 0) | |
331 | vfp11_denorm_fix = BFD_ARM_VFP11_FIX_NONE; | |
332 | else if (strcmp (optarg, "scalar") == 0) | |
333 | vfp11_denorm_fix = BFD_ARM_VFP11_FIX_SCALAR; | |
334 | else if (strcmp (optarg, "vector") == 0) | |
335 | vfp11_denorm_fix = BFD_ARM_VFP11_FIX_VECTOR; | |
336 | else | |
337 | einfo (_("Unrecognized VFP11 fix type '\''%s'\''.\n"), optarg); | |
338 | break; | |
bf21ed78 MS |
339 | |
340 | case OPTION_NO_ENUM_SIZE_WARNING: | |
341 | no_enum_size_warning = 1; | |
342 | break; | |
27e55c4d PB |
343 | |
344 | case OPTION_PIC_VENEER: | |
345 | pic_veneer = 1; | |
346 | break; | |
41392f03 | 347 | ' |
252b5132 | 348 | |
41392f03 AM |
349 | # We have our own after_open and before_allocation functions, but they call |
350 | # the standard routines, so give them a different name. | |
351 | LDEMUL_AFTER_OPEN=arm_elf_after_open | |
352 | LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation | |
c6dd86c6 | 353 | LDEMUL_AFTER_ALLOCATION=arm_elf_after_allocation |
3674e28a | 354 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements |
252b5132 | 355 | |
41392f03 AM |
356 | # Replace the elf before_parse function with our own. |
357 | LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse | |
252b5132 | 358 | |
41392f03 | 359 | # Call the extra arm-elf function |
a48ca7f2 | 360 | LDEMUL_FINISH=arm_elf_finish |