]>
Commit | Line | Data |
---|---|---|
1 | /* Motorola 68HC11/HC12-specific support for 32-bit ELF | |
2 | Copyright (C) 1999-2020 Free Software Foundation, Inc. | |
3 | Contributed by Stephane Carrez (stcarrez@nerim.fr) | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
22 | #include "sysdep.h" | |
23 | #include "alloca-conf.h" | |
24 | #include "bfd.h" | |
25 | #include "bfdlink.h" | |
26 | #include "libbfd.h" | |
27 | #include "elf-bfd.h" | |
28 | #include "elf32-m68hc1x.h" | |
29 | #include "elf/m68hc11.h" | |
30 | #include "opcode/m68hc11.h" | |
31 | #include "libiberty.h" | |
32 | ||
33 | #define m68hc12_stub_hash_lookup(table, string, create, copy) \ | |
34 | ((struct elf32_m68hc11_stub_hash_entry *) \ | |
35 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
36 | ||
37 | static struct elf32_m68hc11_stub_hash_entry* m68hc12_add_stub | |
38 | (const char *stub_name, | |
39 | asection *section, | |
40 | struct m68hc11_elf_link_hash_table *htab); | |
41 | ||
42 | static struct bfd_hash_entry *stub_hash_newfunc | |
43 | (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); | |
44 | ||
45 | static void m68hc11_elf_set_symbol (bfd* abfd, struct bfd_link_info *info, | |
46 | const char* name, bfd_vma value, | |
47 | asection* sec); | |
48 | ||
49 | static bfd_boolean m68hc11_elf_export_one_stub | |
50 | (struct bfd_hash_entry *gen_entry, void *in_arg); | |
51 | ||
52 | static void scan_sections_for_abi (bfd*, asection*, void *); | |
53 | ||
54 | struct m68hc11_scan_param | |
55 | { | |
56 | struct m68hc11_page_info* pinfo; | |
57 | bfd_boolean use_memory_banks; | |
58 | }; | |
59 | ||
60 | ||
61 | /* Destroy a 68HC11/68HC12 ELF linker hash table. */ | |
62 | ||
63 | static void | |
64 | m68hc11_elf_bfd_link_hash_table_free (bfd *obfd) | |
65 | { | |
66 | struct m68hc11_elf_link_hash_table *ret | |
67 | = (struct m68hc11_elf_link_hash_table *) obfd->link.hash; | |
68 | ||
69 | bfd_hash_table_free (ret->stub_hash_table); | |
70 | free (ret->stub_hash_table); | |
71 | _bfd_elf_link_hash_table_free (obfd); | |
72 | } | |
73 | ||
74 | /* Create a 68HC11/68HC12 ELF linker hash table. */ | |
75 | ||
76 | struct m68hc11_elf_link_hash_table* | |
77 | m68hc11_elf_hash_table_create (bfd *abfd) | |
78 | { | |
79 | struct m68hc11_elf_link_hash_table *ret; | |
80 | size_t amt = sizeof (struct m68hc11_elf_link_hash_table); | |
81 | ||
82 | ret = (struct m68hc11_elf_link_hash_table *) bfd_zmalloc (amt); | |
83 | if (ret == (struct m68hc11_elf_link_hash_table *) NULL) | |
84 | return NULL; | |
85 | ||
86 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
87 | _bfd_elf_link_hash_newfunc, | |
88 | sizeof (struct elf_link_hash_entry), | |
89 | M68HC11_ELF_DATA)) | |
90 | { | |
91 | free (ret); | |
92 | return NULL; | |
93 | } | |
94 | ||
95 | /* Init the stub hash table too. */ | |
96 | amt = sizeof (struct bfd_hash_table); | |
97 | ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt); | |
98 | if (ret->stub_hash_table == NULL) | |
99 | { | |
100 | _bfd_elf_link_hash_table_free (abfd); | |
101 | return NULL; | |
102 | } | |
103 | if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc, | |
104 | sizeof (struct elf32_m68hc11_stub_hash_entry))) | |
105 | { | |
106 | free (ret->stub_hash_table); | |
107 | _bfd_elf_link_hash_table_free (abfd); | |
108 | return NULL; | |
109 | } | |
110 | ret->root.root.hash_table_free = m68hc11_elf_bfd_link_hash_table_free; | |
111 | ||
112 | return ret; | |
113 | } | |
114 | ||
115 | /* Assorted hash table functions. */ | |
116 | ||
117 | /* Initialize an entry in the stub hash table. */ | |
118 | ||
119 | static struct bfd_hash_entry * | |
120 | stub_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, | |
121 | const char *string) | |
122 | { | |
123 | /* Allocate the structure if it has not already been allocated by a | |
124 | subclass. */ | |
125 | if (entry == NULL) | |
126 | { | |
127 | entry = bfd_hash_allocate (table, | |
128 | sizeof (struct elf32_m68hc11_stub_hash_entry)); | |
129 | if (entry == NULL) | |
130 | return entry; | |
131 | } | |
132 | ||
133 | /* Call the allocation method of the superclass. */ | |
134 | entry = bfd_hash_newfunc (entry, table, string); | |
135 | if (entry != NULL) | |
136 | { | |
137 | struct elf32_m68hc11_stub_hash_entry *eh; | |
138 | ||
139 | /* Initialize the local fields. */ | |
140 | eh = (struct elf32_m68hc11_stub_hash_entry *) entry; | |
141 | eh->stub_sec = NULL; | |
142 | eh->stub_offset = 0; | |
143 | eh->target_value = 0; | |
144 | eh->target_section = NULL; | |
145 | } | |
146 | ||
147 | return entry; | |
148 | } | |
149 | ||
150 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
151 | stub entry are initialised. */ | |
152 | ||
153 | static struct elf32_m68hc11_stub_hash_entry * | |
154 | m68hc12_add_stub (const char *stub_name, asection *section, | |
155 | struct m68hc11_elf_link_hash_table *htab) | |
156 | { | |
157 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
158 | ||
159 | /* Enter this entry into the linker stub hash table. */ | |
160 | stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name, | |
161 | TRUE, FALSE); | |
162 | if (stub_entry == NULL) | |
163 | { | |
164 | /* xgettext:c-format */ | |
165 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), | |
166 | section->owner, stub_name); | |
167 | return NULL; | |
168 | } | |
169 | ||
170 | if (htab->stub_section == 0) | |
171 | { | |
172 | htab->stub_section = (*htab->add_stub_section) (".tramp", | |
173 | htab->tramp_section); | |
174 | } | |
175 | ||
176 | stub_entry->stub_sec = htab->stub_section; | |
177 | stub_entry->stub_offset = 0; | |
178 | return stub_entry; | |
179 | } | |
180 | ||
181 | /* Hook called by the linker routine which adds symbols from an object | |
182 | file. We use it for identify far symbols and force a loading of | |
183 | the trampoline handler. */ | |
184 | ||
185 | bfd_boolean | |
186 | elf32_m68hc11_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, | |
187 | Elf_Internal_Sym *sym, | |
188 | const char **namep ATTRIBUTE_UNUSED, | |
189 | flagword *flagsp ATTRIBUTE_UNUSED, | |
190 | asection **secp ATTRIBUTE_UNUSED, | |
191 | bfd_vma *valp ATTRIBUTE_UNUSED) | |
192 | { | |
193 | if (sym->st_other & STO_M68HC12_FAR) | |
194 | { | |
195 | struct elf_link_hash_entry *h; | |
196 | ||
197 | h = (struct elf_link_hash_entry *) | |
198 | bfd_link_hash_lookup (info->hash, "__far_trampoline", | |
199 | FALSE, FALSE, FALSE); | |
200 | if (h == NULL) | |
201 | { | |
202 | struct bfd_link_hash_entry* entry = NULL; | |
203 | ||
204 | _bfd_generic_link_add_one_symbol (info, abfd, | |
205 | "__far_trampoline", | |
206 | BSF_GLOBAL, | |
207 | bfd_und_section_ptr, | |
208 | (bfd_vma) 0, (const char*) NULL, | |
209 | FALSE, FALSE, &entry); | |
210 | } | |
211 | ||
212 | } | |
213 | return TRUE; | |
214 | } | |
215 | ||
216 | /* Merge non-visibility st_other attributes, STO_M68HC12_FAR and | |
217 | STO_M68HC12_INTERRUPT. */ | |
218 | ||
219 | void | |
220 | elf32_m68hc11_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
221 | const Elf_Internal_Sym *isym, | |
222 | bfd_boolean definition, | |
223 | bfd_boolean dynamic ATTRIBUTE_UNUSED) | |
224 | { | |
225 | if (definition) | |
226 | h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) | |
227 | | ELF_ST_VISIBILITY (h->other)); | |
228 | } | |
229 | ||
230 | /* External entry points for sizing and building linker stubs. */ | |
231 | ||
232 | /* Set up various things so that we can make a list of input sections | |
233 | for each output section included in the link. Returns -1 on error, | |
234 | 0 when no stubs will be needed, and 1 on success. */ | |
235 | ||
236 | int | |
237 | elf32_m68hc11_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) | |
238 | { | |
239 | bfd *input_bfd; | |
240 | unsigned int bfd_count; | |
241 | unsigned int top_id, top_index; | |
242 | asection *section; | |
243 | asection **input_list, **list; | |
244 | size_t amt; | |
245 | asection *text_section; | |
246 | struct m68hc11_elf_link_hash_table *htab; | |
247 | ||
248 | htab = m68hc11_elf_hash_table (info); | |
249 | if (htab == NULL) | |
250 | return -1; | |
251 | ||
252 | if (bfd_get_flavour (info->output_bfd) != bfd_target_elf_flavour) | |
253 | return 0; | |
254 | ||
255 | /* Count the number of input BFDs and find the top input section id. | |
256 | Also search for an existing ".tramp" section so that we know | |
257 | where generated trampolines must go. Default to ".text" if we | |
258 | can't find it. */ | |
259 | htab->tramp_section = 0; | |
260 | text_section = 0; | |
261 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
262 | input_bfd != NULL; | |
263 | input_bfd = input_bfd->link.next) | |
264 | { | |
265 | bfd_count += 1; | |
266 | for (section = input_bfd->sections; | |
267 | section != NULL; | |
268 | section = section->next) | |
269 | { | |
270 | const char *name = bfd_section_name (section); | |
271 | ||
272 | if (!strcmp (name, ".tramp")) | |
273 | htab->tramp_section = section; | |
274 | ||
275 | if (!strcmp (name, ".text")) | |
276 | text_section = section; | |
277 | ||
278 | if (top_id < section->id) | |
279 | top_id = section->id; | |
280 | } | |
281 | } | |
282 | htab->bfd_count = bfd_count; | |
283 | if (htab->tramp_section == 0) | |
284 | htab->tramp_section = text_section; | |
285 | ||
286 | /* We can't use output_bfd->section_count here to find the top output | |
287 | section index as some sections may have been removed, and | |
288 | strip_excluded_output_sections doesn't renumber the indices. */ | |
289 | for (section = output_bfd->sections, top_index = 0; | |
290 | section != NULL; | |
291 | section = section->next) | |
292 | { | |
293 | if (top_index < section->index) | |
294 | top_index = section->index; | |
295 | } | |
296 | ||
297 | htab->top_index = top_index; | |
298 | amt = sizeof (asection *) * (top_index + 1); | |
299 | input_list = (asection **) bfd_malloc (amt); | |
300 | htab->input_list = input_list; | |
301 | if (input_list == NULL) | |
302 | return -1; | |
303 | ||
304 | /* For sections we aren't interested in, mark their entries with a | |
305 | value we can check later. */ | |
306 | list = input_list + top_index; | |
307 | do | |
308 | *list = bfd_abs_section_ptr; | |
309 | while (list-- != input_list); | |
310 | ||
311 | for (section = output_bfd->sections; | |
312 | section != NULL; | |
313 | section = section->next) | |
314 | { | |
315 | if ((section->flags & SEC_CODE) != 0) | |
316 | input_list[section->index] = NULL; | |
317 | } | |
318 | ||
319 | return 1; | |
320 | } | |
321 | ||
322 | /* Determine and set the size of the stub section for a final link. | |
323 | ||
324 | The basic idea here is to examine all the relocations looking for | |
325 | PC-relative calls to a target that is unreachable with a "bl" | |
326 | instruction. */ | |
327 | ||
328 | bfd_boolean | |
329 | elf32_m68hc11_size_stubs (bfd *output_bfd, bfd *stub_bfd, | |
330 | struct bfd_link_info *info, | |
331 | asection * (*add_stub_section) (const char*, asection*)) | |
332 | { | |
333 | bfd *input_bfd; | |
334 | asection *section; | |
335 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
336 | unsigned int bfd_indx, bfd_count; | |
337 | size_t amt; | |
338 | asection *stub_sec; | |
339 | struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info); | |
340 | ||
341 | if (htab == NULL) | |
342 | return FALSE; | |
343 | ||
344 | /* Stash our params away. */ | |
345 | htab->stub_bfd = stub_bfd; | |
346 | htab->add_stub_section = add_stub_section; | |
347 | ||
348 | /* Count the number of input BFDs and find the top input section id. */ | |
349 | for (input_bfd = info->input_bfds, bfd_count = 0; | |
350 | input_bfd != NULL; | |
351 | input_bfd = input_bfd->link.next) | |
352 | bfd_count += 1; | |
353 | ||
354 | /* We want to read in symbol extension records only once. To do this | |
355 | we need to read in the local symbols in parallel and save them for | |
356 | later use; so hold pointers to the local symbols in an array. */ | |
357 | amt = sizeof (Elf_Internal_Sym *) * bfd_count; | |
358 | all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); | |
359 | if (all_local_syms == NULL) | |
360 | return FALSE; | |
361 | ||
362 | /* Walk over all the input BFDs, swapping in local symbols. */ | |
363 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
364 | input_bfd != NULL; | |
365 | input_bfd = input_bfd->link.next, bfd_indx++) | |
366 | { | |
367 | Elf_Internal_Shdr *symtab_hdr; | |
368 | ||
369 | /* We'll need the symbol table in a second. */ | |
370 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
371 | if (symtab_hdr->sh_info == 0) | |
372 | continue; | |
373 | ||
374 | /* We need an array of the local symbols attached to the input bfd. */ | |
375 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
376 | if (local_syms == NULL) | |
377 | { | |
378 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
379 | symtab_hdr->sh_info, 0, | |
380 | NULL, NULL, NULL); | |
381 | /* Cache them for elf_link_input_bfd. */ | |
382 | symtab_hdr->contents = (unsigned char *) local_syms; | |
383 | } | |
384 | if (local_syms == NULL) | |
385 | { | |
386 | free (all_local_syms); | |
387 | return FALSE; | |
388 | } | |
389 | ||
390 | all_local_syms[bfd_indx] = local_syms; | |
391 | } | |
392 | ||
393 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
394 | input_bfd != NULL; | |
395 | input_bfd = input_bfd->link.next, bfd_indx++) | |
396 | { | |
397 | Elf_Internal_Shdr *symtab_hdr; | |
398 | struct elf_link_hash_entry ** sym_hashes; | |
399 | ||
400 | sym_hashes = elf_sym_hashes (input_bfd); | |
401 | ||
402 | /* We'll need the symbol table in a second. */ | |
403 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
404 | if (symtab_hdr->sh_info == 0) | |
405 | continue; | |
406 | ||
407 | local_syms = all_local_syms[bfd_indx]; | |
408 | ||
409 | /* Walk over each section attached to the input bfd. */ | |
410 | for (section = input_bfd->sections; | |
411 | section != NULL; | |
412 | section = section->next) | |
413 | { | |
414 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
415 | ||
416 | /* If there aren't any relocs, then there's nothing more | |
417 | to do. */ | |
418 | if ((section->flags & SEC_RELOC) == 0 | |
419 | || section->reloc_count == 0) | |
420 | continue; | |
421 | ||
422 | /* If this section is a link-once section that will be | |
423 | discarded, then don't create any stubs. */ | |
424 | if (section->output_section == NULL | |
425 | || section->output_section->owner != output_bfd) | |
426 | continue; | |
427 | ||
428 | /* Get the relocs. */ | |
429 | internal_relocs | |
430 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, | |
431 | (Elf_Internal_Rela *) NULL, | |
432 | info->keep_memory); | |
433 | if (internal_relocs == NULL) | |
434 | goto error_ret_free_local; | |
435 | ||
436 | /* Now examine each relocation. */ | |
437 | irela = internal_relocs; | |
438 | irelaend = irela + section->reloc_count; | |
439 | for (; irela < irelaend; irela++) | |
440 | { | |
441 | unsigned int r_type, r_indx; | |
442 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
443 | asection *sym_sec; | |
444 | bfd_vma sym_value; | |
445 | struct elf_link_hash_entry *hash; | |
446 | const char *stub_name; | |
447 | Elf_Internal_Sym *sym; | |
448 | ||
449 | r_type = ELF32_R_TYPE (irela->r_info); | |
450 | ||
451 | /* Only look at 16-bit relocs. */ | |
452 | if (r_type != (unsigned int) R_M68HC11_16) | |
453 | continue; | |
454 | ||
455 | /* Now determine the call target, its name, value, | |
456 | section. */ | |
457 | r_indx = ELF32_R_SYM (irela->r_info); | |
458 | if (r_indx < symtab_hdr->sh_info) | |
459 | { | |
460 | /* It's a local symbol. */ | |
461 | Elf_Internal_Shdr *hdr; | |
462 | bfd_boolean is_far; | |
463 | ||
464 | sym = local_syms + r_indx; | |
465 | is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); | |
466 | if (!is_far) | |
467 | continue; | |
468 | ||
469 | if (sym->st_shndx >= elf_numsections (input_bfd)) | |
470 | sym_sec = NULL; | |
471 | else | |
472 | { | |
473 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
474 | sym_sec = hdr->bfd_section; | |
475 | } | |
476 | stub_name = (bfd_elf_string_from_elf_section | |
477 | (input_bfd, symtab_hdr->sh_link, | |
478 | sym->st_name)); | |
479 | sym_value = sym->st_value; | |
480 | hash = NULL; | |
481 | } | |
482 | else | |
483 | { | |
484 | /* It's an external symbol. */ | |
485 | int e_indx; | |
486 | ||
487 | e_indx = r_indx - symtab_hdr->sh_info; | |
488 | hash = (struct elf_link_hash_entry *) | |
489 | (sym_hashes[e_indx]); | |
490 | ||
491 | while (hash->root.type == bfd_link_hash_indirect | |
492 | || hash->root.type == bfd_link_hash_warning) | |
493 | hash = ((struct elf_link_hash_entry *) | |
494 | hash->root.u.i.link); | |
495 | ||
496 | if (hash->root.type == bfd_link_hash_defined | |
497 | || hash->root.type == bfd_link_hash_defweak | |
498 | || hash->root.type == bfd_link_hash_new) | |
499 | { | |
500 | if (!(hash->other & STO_M68HC12_FAR)) | |
501 | continue; | |
502 | } | |
503 | else if (hash->root.type == bfd_link_hash_undefweak) | |
504 | { | |
505 | continue; | |
506 | } | |
507 | else if (hash->root.type == bfd_link_hash_undefined) | |
508 | { | |
509 | continue; | |
510 | } | |
511 | else | |
512 | { | |
513 | bfd_set_error (bfd_error_bad_value); | |
514 | goto error_ret_free_internal; | |
515 | } | |
516 | sym_sec = hash->root.u.def.section; | |
517 | sym_value = hash->root.u.def.value; | |
518 | stub_name = hash->root.root.string; | |
519 | } | |
520 | ||
521 | if (!stub_name) | |
522 | goto error_ret_free_internal; | |
523 | ||
524 | stub_entry = m68hc12_stub_hash_lookup | |
525 | (htab->stub_hash_table, | |
526 | stub_name, | |
527 | FALSE, FALSE); | |
528 | if (stub_entry == NULL) | |
529 | { | |
530 | if (add_stub_section == 0) | |
531 | continue; | |
532 | ||
533 | stub_entry = m68hc12_add_stub (stub_name, section, htab); | |
534 | if (stub_entry == NULL) | |
535 | { | |
536 | error_ret_free_internal: | |
537 | if (elf_section_data (section)->relocs == NULL) | |
538 | free (internal_relocs); | |
539 | goto error_ret_free_local; | |
540 | } | |
541 | } | |
542 | ||
543 | stub_entry->target_value = sym_value; | |
544 | stub_entry->target_section = sym_sec; | |
545 | } | |
546 | ||
547 | /* We're done with the internal relocs, free them. */ | |
548 | if (elf_section_data (section)->relocs == NULL) | |
549 | free (internal_relocs); | |
550 | } | |
551 | } | |
552 | ||
553 | if (add_stub_section) | |
554 | { | |
555 | /* OK, we've added some stubs. Find out the new size of the | |
556 | stub sections. */ | |
557 | for (stub_sec = htab->stub_bfd->sections; | |
558 | stub_sec != NULL; | |
559 | stub_sec = stub_sec->next) | |
560 | { | |
561 | stub_sec->size = 0; | |
562 | } | |
563 | ||
564 | bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab); | |
565 | } | |
566 | free (all_local_syms); | |
567 | return TRUE; | |
568 | ||
569 | error_ret_free_local: | |
570 | free (all_local_syms); | |
571 | return FALSE; | |
572 | } | |
573 | ||
574 | /* Export the trampoline addresses in the symbol table. */ | |
575 | static bfd_boolean | |
576 | m68hc11_elf_export_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) | |
577 | { | |
578 | struct bfd_link_info *info; | |
579 | struct m68hc11_elf_link_hash_table *htab; | |
580 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
581 | char* name; | |
582 | bfd_boolean result; | |
583 | ||
584 | info = (struct bfd_link_info *) in_arg; | |
585 | htab = m68hc11_elf_hash_table (info); | |
586 | if (htab == NULL) | |
587 | return FALSE; | |
588 | ||
589 | /* Massage our args to the form they really have. */ | |
590 | stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; | |
591 | ||
592 | /* Generate the trampoline according to HC11 or HC12. */ | |
593 | result = (* htab->build_one_stub) (gen_entry, in_arg); | |
594 | ||
595 | /* Make a printable name that does not conflict with the real function. */ | |
596 | name = concat ("tramp.", stub_entry->root.string, NULL); | |
597 | ||
598 | /* Export the symbol for debugging/disassembling. */ | |
599 | m68hc11_elf_set_symbol (htab->stub_bfd, info, name, | |
600 | stub_entry->stub_offset, | |
601 | stub_entry->stub_sec); | |
602 | free (name); | |
603 | return result; | |
604 | } | |
605 | ||
606 | /* Export a symbol or set its value and section. */ | |
607 | static void | |
608 | m68hc11_elf_set_symbol (bfd *abfd, struct bfd_link_info *info, | |
609 | const char *name, bfd_vma value, asection *sec) | |
610 | { | |
611 | struct elf_link_hash_entry *h; | |
612 | ||
613 | h = (struct elf_link_hash_entry *) | |
614 | bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE); | |
615 | if (h == NULL) | |
616 | { | |
617 | _bfd_generic_link_add_one_symbol (info, abfd, | |
618 | name, | |
619 | BSF_GLOBAL, | |
620 | sec, | |
621 | value, | |
622 | (const char*) NULL, | |
623 | TRUE, FALSE, NULL); | |
624 | } | |
625 | else | |
626 | { | |
627 | h->root.type = bfd_link_hash_defined; | |
628 | h->root.u.def.value = value; | |
629 | h->root.u.def.section = sec; | |
630 | } | |
631 | } | |
632 | ||
633 | ||
634 | /* Build all the stubs associated with the current output file. The | |
635 | stubs are kept in a hash table attached to the main linker hash | |
636 | table. This function is called via m68hc12elf_finish in the | |
637 | linker. */ | |
638 | ||
639 | bfd_boolean | |
640 | elf32_m68hc11_build_stubs (bfd *abfd, struct bfd_link_info *info) | |
641 | { | |
642 | asection *stub_sec; | |
643 | struct bfd_hash_table *table; | |
644 | struct m68hc11_elf_link_hash_table *htab; | |
645 | struct m68hc11_scan_param param; | |
646 | ||
647 | m68hc11_elf_get_bank_parameters (info); | |
648 | htab = m68hc11_elf_hash_table (info); | |
649 | if (htab == NULL) | |
650 | return FALSE; | |
651 | ||
652 | for (stub_sec = htab->stub_bfd->sections; | |
653 | stub_sec != NULL; | |
654 | stub_sec = stub_sec->next) | |
655 | { | |
656 | bfd_size_type size; | |
657 | ||
658 | /* Allocate memory to hold the linker stubs. */ | |
659 | size = stub_sec->size; | |
660 | stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); | |
661 | if (stub_sec->contents == NULL && size != 0) | |
662 | return FALSE; | |
663 | stub_sec->size = 0; | |
664 | } | |
665 | ||
666 | /* Build the stubs as directed by the stub hash table. */ | |
667 | table = htab->stub_hash_table; | |
668 | bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info); | |
669 | ||
670 | /* Scan the output sections to see if we use the memory banks. | |
671 | If so, export the symbols that define how the memory banks | |
672 | are mapped. This is used by gdb and the simulator to obtain | |
673 | the information. It can be used by programs to burn the eprom | |
674 | at the good addresses. */ | |
675 | param.use_memory_banks = FALSE; | |
676 | param.pinfo = &htab->pinfo; | |
677 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); | |
678 | if (param.use_memory_banks) | |
679 | { | |
680 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME, | |
681 | htab->pinfo.bank_physical, | |
682 | bfd_abs_section_ptr); | |
683 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
684 | htab->pinfo.bank_virtual, | |
685 | bfd_abs_section_ptr); | |
686 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME, | |
687 | htab->pinfo.bank_size, | |
688 | bfd_abs_section_ptr); | |
689 | } | |
690 | ||
691 | return TRUE; | |
692 | } | |
693 | ||
694 | void | |
695 | m68hc11_elf_get_bank_parameters (struct bfd_link_info *info) | |
696 | { | |
697 | unsigned i; | |
698 | struct m68hc11_page_info *pinfo; | |
699 | struct bfd_link_hash_entry *h; | |
700 | struct m68hc11_elf_link_hash_table *htab; | |
701 | ||
702 | htab = m68hc11_elf_hash_table (info); | |
703 | if (htab == NULL) | |
704 | return; | |
705 | ||
706 | pinfo = & htab->pinfo; | |
707 | if (pinfo->bank_param_initialized) | |
708 | return; | |
709 | ||
710 | pinfo->bank_virtual = M68HC12_BANK_VIRT; | |
711 | pinfo->bank_mask = M68HC12_BANK_MASK; | |
712 | pinfo->bank_physical = M68HC12_BANK_BASE; | |
713 | pinfo->bank_shift = M68HC12_BANK_SHIFT; | |
714 | pinfo->bank_size = 1 << M68HC12_BANK_SHIFT; | |
715 | ||
716 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME, | |
717 | FALSE, FALSE, TRUE); | |
718 | if (h != (struct bfd_link_hash_entry*) NULL | |
719 | && h->type == bfd_link_hash_defined) | |
720 | pinfo->bank_physical = (h->u.def.value | |
721 | + h->u.def.section->output_section->vma | |
722 | + h->u.def.section->output_offset); | |
723 | ||
724 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
725 | FALSE, FALSE, TRUE); | |
726 | if (h != (struct bfd_link_hash_entry*) NULL | |
727 | && h->type == bfd_link_hash_defined) | |
728 | pinfo->bank_virtual = (h->u.def.value | |
729 | + h->u.def.section->output_section->vma | |
730 | + h->u.def.section->output_offset); | |
731 | ||
732 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME, | |
733 | FALSE, FALSE, TRUE); | |
734 | if (h != (struct bfd_link_hash_entry*) NULL | |
735 | && h->type == bfd_link_hash_defined) | |
736 | pinfo->bank_size = (h->u.def.value | |
737 | + h->u.def.section->output_section->vma | |
738 | + h->u.def.section->output_offset); | |
739 | ||
740 | pinfo->bank_shift = 0; | |
741 | for (i = pinfo->bank_size; i != 0; i >>= 1) | |
742 | pinfo->bank_shift++; | |
743 | pinfo->bank_shift--; | |
744 | pinfo->bank_mask = (1 << pinfo->bank_shift) - 1; | |
745 | pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size; | |
746 | pinfo->bank_param_initialized = 1; | |
747 | ||
748 | h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE, | |
749 | FALSE, TRUE); | |
750 | if (h != (struct bfd_link_hash_entry*) NULL | |
751 | && h->type == bfd_link_hash_defined) | |
752 | pinfo->trampoline_addr = (h->u.def.value | |
753 | + h->u.def.section->output_section->vma | |
754 | + h->u.def.section->output_offset); | |
755 | } | |
756 | ||
757 | /* Return 1 if the address is in banked memory. | |
758 | This can be applied to a virtual address and to a physical address. */ | |
759 | int | |
760 | m68hc11_addr_is_banked (struct m68hc11_page_info *pinfo, bfd_vma addr) | |
761 | { | |
762 | if (addr >= pinfo->bank_virtual) | |
763 | return 1; | |
764 | ||
765 | if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end) | |
766 | return 1; | |
767 | ||
768 | return 0; | |
769 | } | |
770 | ||
771 | /* Return the physical address seen by the processor, taking | |
772 | into account banked memory. */ | |
773 | bfd_vma | |
774 | m68hc11_phys_addr (struct m68hc11_page_info *pinfo, bfd_vma addr) | |
775 | { | |
776 | if (addr < pinfo->bank_virtual) | |
777 | return addr; | |
778 | ||
779 | /* Map the address to the memory bank. */ | |
780 | addr -= pinfo->bank_virtual; | |
781 | addr &= pinfo->bank_mask; | |
782 | addr += pinfo->bank_physical; | |
783 | return addr; | |
784 | } | |
785 | ||
786 | /* Return the page number corresponding to an address in banked memory. */ | |
787 | bfd_vma | |
788 | m68hc11_phys_page (struct m68hc11_page_info *pinfo, bfd_vma addr) | |
789 | { | |
790 | if (addr < pinfo->bank_virtual) | |
791 | return 0; | |
792 | ||
793 | /* Map the address to the memory bank. */ | |
794 | addr -= pinfo->bank_virtual; | |
795 | addr >>= pinfo->bank_shift; | |
796 | addr &= 0x0ff; | |
797 | return addr; | |
798 | } | |
799 | ||
800 | /* This function is used for relocs which are only used for relaxing, | |
801 | which the linker should otherwise ignore. */ | |
802 | ||
803 | bfd_reloc_status_type | |
804 | m68hc11_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, | |
805 | arelent *reloc_entry, | |
806 | asymbol *symbol ATTRIBUTE_UNUSED, | |
807 | void *data ATTRIBUTE_UNUSED, | |
808 | asection *input_section, | |
809 | bfd *output_bfd, | |
810 | char **error_message ATTRIBUTE_UNUSED) | |
811 | { | |
812 | if (output_bfd != NULL) | |
813 | reloc_entry->address += input_section->output_offset; | |
814 | return bfd_reloc_ok; | |
815 | } | |
816 | ||
817 | bfd_reloc_status_type | |
818 | m68hc11_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED, | |
819 | arelent *reloc_entry, | |
820 | asymbol *symbol, | |
821 | void *data ATTRIBUTE_UNUSED, | |
822 | asection *input_section, | |
823 | bfd *output_bfd, | |
824 | char **error_message ATTRIBUTE_UNUSED) | |
825 | { | |
826 | if (output_bfd != (bfd *) NULL | |
827 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
828 | && (! reloc_entry->howto->partial_inplace | |
829 | || reloc_entry->addend == 0)) | |
830 | { | |
831 | reloc_entry->address += input_section->output_offset; | |
832 | return bfd_reloc_ok; | |
833 | } | |
834 | ||
835 | if (output_bfd != NULL) | |
836 | return bfd_reloc_continue; | |
837 | ||
838 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) | |
839 | return bfd_reloc_outofrange; | |
840 | ||
841 | abort(); | |
842 | } | |
843 | ||
844 | /* Look through the relocs for a section during the first phase. | |
845 | Since we don't do .gots or .plts, we just need to consider the | |
846 | virtual table relocs for gc. */ | |
847 | ||
848 | bfd_boolean | |
849 | elf32_m68hc11_check_relocs (bfd *abfd, struct bfd_link_info *info, | |
850 | asection *sec, const Elf_Internal_Rela *relocs) | |
851 | { | |
852 | Elf_Internal_Shdr * symtab_hdr; | |
853 | struct elf_link_hash_entry ** sym_hashes; | |
854 | const Elf_Internal_Rela * rel; | |
855 | const Elf_Internal_Rela * rel_end; | |
856 | ||
857 | if (bfd_link_relocatable (info)) | |
858 | return TRUE; | |
859 | ||
860 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
861 | sym_hashes = elf_sym_hashes (abfd); | |
862 | rel_end = relocs + sec->reloc_count; | |
863 | ||
864 | for (rel = relocs; rel < rel_end; rel++) | |
865 | { | |
866 | struct elf_link_hash_entry * h; | |
867 | unsigned long r_symndx; | |
868 | ||
869 | r_symndx = ELF32_R_SYM (rel->r_info); | |
870 | ||
871 | if (r_symndx < symtab_hdr->sh_info) | |
872 | h = NULL; | |
873 | else | |
874 | { | |
875 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
876 | while (h->root.type == bfd_link_hash_indirect | |
877 | || h->root.type == bfd_link_hash_warning) | |
878 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
879 | } | |
880 | ||
881 | switch (ELF32_R_TYPE (rel->r_info)) | |
882 | { | |
883 | /* This relocation describes the C++ object vtable hierarchy. | |
884 | Reconstruct it for later use during GC. */ | |
885 | case R_M68HC11_GNU_VTINHERIT: | |
886 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
887 | return FALSE; | |
888 | break; | |
889 | ||
890 | /* This relocation describes which C++ vtable entries are actually | |
891 | used. Record for later use during GC. */ | |
892 | case R_M68HC11_GNU_VTENTRY: | |
893 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
894 | return FALSE; | |
895 | break; | |
896 | } | |
897 | } | |
898 | ||
899 | return TRUE; | |
900 | } | |
901 | ||
902 | static bfd_boolean ATTRIBUTE_PRINTF (6, 7) | |
903 | reloc_warning (struct bfd_link_info *info, const char *name, bfd *input_bfd, | |
904 | asection *input_section, const Elf_Internal_Rela *rel, | |
905 | const char *fmt, ...) | |
906 | { | |
907 | va_list ap; | |
908 | char *buf; | |
909 | int ret; | |
910 | ||
911 | va_start (ap, fmt); | |
912 | ret = vasprintf (&buf, fmt, ap); | |
913 | va_end (ap); | |
914 | if (ret < 0) | |
915 | { | |
916 | bfd_set_error (bfd_error_no_memory); | |
917 | return FALSE; | |
918 | } | |
919 | info->callbacks->warning (info, buf, name, input_bfd, input_section, | |
920 | rel->r_offset); | |
921 | free (buf); | |
922 | return TRUE; | |
923 | } | |
924 | ||
925 | /* Relocate a 68hc11/68hc12 ELF section. */ | |
926 | bfd_boolean | |
927 | elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, | |
928 | struct bfd_link_info *info, | |
929 | bfd *input_bfd, asection *input_section, | |
930 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
931 | Elf_Internal_Sym *local_syms, | |
932 | asection **local_sections) | |
933 | { | |
934 | Elf_Internal_Shdr *symtab_hdr; | |
935 | struct elf_link_hash_entry **sym_hashes; | |
936 | Elf_Internal_Rela *rel, *relend; | |
937 | const char *name = NULL; | |
938 | struct m68hc11_page_info *pinfo; | |
939 | const struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd); | |
940 | struct m68hc11_elf_link_hash_table *htab; | |
941 | unsigned long e_flags; | |
942 | ||
943 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
944 | sym_hashes = elf_sym_hashes (input_bfd); | |
945 | e_flags = elf_elfheader (input_bfd)->e_flags; | |
946 | ||
947 | htab = m68hc11_elf_hash_table (info); | |
948 | if (htab == NULL) | |
949 | return FALSE; | |
950 | ||
951 | /* Get memory bank parameters. */ | |
952 | m68hc11_elf_get_bank_parameters (info); | |
953 | ||
954 | pinfo = & htab->pinfo; | |
955 | rel = relocs; | |
956 | relend = relocs + input_section->reloc_count; | |
957 | ||
958 | for (; rel < relend; rel++) | |
959 | { | |
960 | int r_type; | |
961 | arelent arel; | |
962 | reloc_howto_type *howto; | |
963 | unsigned long r_symndx; | |
964 | Elf_Internal_Sym *sym; | |
965 | asection *sec; | |
966 | bfd_vma relocation = 0; | |
967 | bfd_reloc_status_type r = bfd_reloc_undefined; | |
968 | bfd_vma phys_page; | |
969 | bfd_vma phys_addr; | |
970 | bfd_vma insn_addr; | |
971 | bfd_vma insn_page; | |
972 | bfd_boolean is_far = FALSE; | |
973 | bfd_boolean is_xgate_symbol = FALSE; | |
974 | bfd_boolean is_section_symbol = FALSE; | |
975 | struct elf_link_hash_entry *h; | |
976 | bfd_vma val; | |
977 | const char *msg; | |
978 | ||
979 | r_symndx = ELF32_R_SYM (rel->r_info); | |
980 | r_type = ELF32_R_TYPE (rel->r_info); | |
981 | ||
982 | if (r_type == R_M68HC11_GNU_VTENTRY | |
983 | || r_type == R_M68HC11_GNU_VTINHERIT) | |
984 | continue; | |
985 | ||
986 | if (! (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel)) | |
987 | continue; | |
988 | howto = arel.howto; | |
989 | ||
990 | h = NULL; | |
991 | sym = NULL; | |
992 | sec = NULL; | |
993 | if (r_symndx < symtab_hdr->sh_info) | |
994 | { | |
995 | sym = local_syms + r_symndx; | |
996 | sec = local_sections[r_symndx]; | |
997 | relocation = (sec->output_section->vma | |
998 | + sec->output_offset | |
999 | + sym->st_value); | |
1000 | is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); | |
1001 | is_xgate_symbol = (sym && (sym->st_target_internal)); | |
1002 | is_section_symbol = ELF_ST_TYPE (sym->st_info) & STT_SECTION; | |
1003 | } | |
1004 | else | |
1005 | { | |
1006 | bfd_boolean unresolved_reloc, warned, ignored; | |
1007 | ||
1008 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1009 | r_symndx, symtab_hdr, sym_hashes, | |
1010 | h, sec, relocation, unresolved_reloc, | |
1011 | warned, ignored); | |
1012 | ||
1013 | is_far = (h && (h->other & STO_M68HC12_FAR)); | |
1014 | is_xgate_symbol = (h && (h->target_internal)); | |
1015 | } | |
1016 | ||
1017 | if (sec != NULL && discarded_section (sec)) | |
1018 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
1019 | rel, 1, relend, howto, 0, contents); | |
1020 | ||
1021 | if (bfd_link_relocatable (info)) | |
1022 | { | |
1023 | /* This is a relocatable link. We don't have to change | |
1024 | anything, unless the reloc is against a section symbol, | |
1025 | in which case we have to adjust according to where the | |
1026 | section symbol winds up in the output section. */ | |
1027 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1028 | rel->r_addend += sec->output_offset; | |
1029 | continue; | |
1030 | } | |
1031 | ||
1032 | if (h != NULL) | |
1033 | name = h->root.root.string; | |
1034 | else | |
1035 | { | |
1036 | name = (bfd_elf_string_from_elf_section | |
1037 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
1038 | if (name == NULL || *name == '\0') | |
1039 | name = bfd_section_name (sec); | |
1040 | } | |
1041 | ||
1042 | if (is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16) | |
1043 | { | |
1044 | struct elf32_m68hc11_stub_hash_entry* stub; | |
1045 | ||
1046 | stub = m68hc12_stub_hash_lookup (htab->stub_hash_table, | |
1047 | name, FALSE, FALSE); | |
1048 | if (stub) | |
1049 | { | |
1050 | relocation = stub->stub_offset | |
1051 | + stub->stub_sec->output_section->vma | |
1052 | + stub->stub_sec->output_offset; | |
1053 | is_far = FALSE; | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | /* Do the memory bank mapping. */ | |
1058 | phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend); | |
1059 | phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend); | |
1060 | switch (r_type) | |
1061 | { | |
1062 | case R_M68HC12_LO8XG: | |
1063 | /* This relocation is specific to XGATE IMM16 calls and will precede | |
1064 | a HI8. tc-m68hc11 only generates them in pairs. | |
1065 | Leave the relocation to the HI8XG step. */ | |
1066 | r = bfd_reloc_ok; | |
1067 | r_type = R_M68HC11_NONE; | |
1068 | break; | |
1069 | ||
1070 | case R_M68HC12_HI8XG: | |
1071 | /* This relocation is specific to XGATE IMM16 calls and must follow | |
1072 | a LO8XG. Does not actually check that it was a LO8XG. | |
1073 | Adjusts high and low bytes. */ | |
1074 | relocation = phys_addr; | |
1075 | if ((e_flags & E_M68HC11_XGATE_RAMOFFSET) | |
1076 | && (relocation >= 0x2000)) | |
1077 | relocation += 0xc000; /* HARDCODED RAM offset for XGATE. */ | |
1078 | ||
1079 | /* Fetch 16 bit value including low byte in previous insn. */ | |
1080 | val = (bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset) << 8) | |
1081 | | bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset - 2); | |
1082 | ||
1083 | /* Add on value to preserve carry, then write zero to high byte. */ | |
1084 | relocation += val; | |
1085 | ||
1086 | /* Write out top byte. */ | |
1087 | bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, | |
1088 | (bfd_byte*) contents + rel->r_offset); | |
1089 | ||
1090 | /* Write out low byte to previous instruction. */ | |
1091 | bfd_put_8 (input_bfd, relocation & 0xff, | |
1092 | (bfd_byte*) contents + rel->r_offset - 2); | |
1093 | ||
1094 | /* Mark as relocation completed. */ | |
1095 | r = bfd_reloc_ok; | |
1096 | r_type = R_M68HC11_NONE; | |
1097 | break; | |
1098 | ||
1099 | /* The HI8 and LO8 relocs are generated by %hi(expr) %lo(expr) | |
1100 | assembler directives. %hi does not support carry. */ | |
1101 | case R_M68HC11_HI8: | |
1102 | case R_M68HC11_LO8: | |
1103 | relocation = phys_addr; | |
1104 | break; | |
1105 | ||
1106 | case R_M68HC11_24: | |
1107 | /* Reloc used by 68HC12 call instruction. */ | |
1108 | bfd_put_16 (input_bfd, phys_addr, | |
1109 | (bfd_byte*) contents + rel->r_offset); | |
1110 | bfd_put_8 (input_bfd, phys_page, | |
1111 | (bfd_byte*) contents + rel->r_offset + 2); | |
1112 | r = bfd_reloc_ok; | |
1113 | r_type = R_M68HC11_NONE; | |
1114 | break; | |
1115 | ||
1116 | case R_M68HC11_NONE: | |
1117 | r = bfd_reloc_ok; | |
1118 | break; | |
1119 | ||
1120 | case R_M68HC11_LO16: | |
1121 | /* Reloc generated by %addr(expr) gas to obtain the | |
1122 | address as mapped in the memory bank window. */ | |
1123 | relocation = phys_addr; | |
1124 | break; | |
1125 | ||
1126 | case R_M68HC11_PAGE: | |
1127 | /* Reloc generated by %page(expr) gas to obtain the | |
1128 | page number associated with the address. */ | |
1129 | relocation = phys_page; | |
1130 | break; | |
1131 | ||
1132 | case R_M68HC11_16: | |
1133 | if (is_far) | |
1134 | { | |
1135 | if (!reloc_warning (info, name, input_bfd, input_section, rel, | |
1136 | _("reference to the far symbol `%s' using a " | |
1137 | "wrong relocation may result in incorrect " | |
1138 | "execution"), name)) | |
1139 | return FALSE; | |
1140 | } | |
1141 | ||
1142 | /* Get virtual address of instruction having the relocation. */ | |
1143 | insn_addr = input_section->output_section->vma | |
1144 | + input_section->output_offset | |
1145 | + rel->r_offset; | |
1146 | ||
1147 | insn_page = m68hc11_phys_page (pinfo, insn_addr); | |
1148 | ||
1149 | /* If we are linking an S12 instruction against an XGATE symbol, we | |
1150 | need to change the offset of the symbol value so that it's correct | |
1151 | from the S12's perspective. */ | |
1152 | if (is_xgate_symbol) | |
1153 | { | |
1154 | /* The ram in the global space is mapped to 0x2000 in the 16-bit | |
1155 | address space for S12 and 0xE000 in the 16-bit address space | |
1156 | for XGATE. */ | |
1157 | if (relocation >= 0xE000) | |
1158 | { | |
1159 | /* We offset the address by the difference | |
1160 | between these two mappings. */ | |
1161 | relocation -= 0xC000; | |
1162 | break; | |
1163 | } | |
1164 | else | |
1165 | { | |
1166 | if (!reloc_warning (info, name, input_bfd, input_section, rel, | |
1167 | _("XGATE address (%lx) is not within " | |
1168 | "shared RAM(0xE000-0xFFFF), therefore " | |
1169 | "you must manually offset the address, " | |
1170 | "and possibly manage the page, in your " | |
1171 | "code."), (long) phys_addr)) | |
1172 | return FALSE; | |
1173 | break; | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend) | |
1178 | && m68hc11_addr_is_banked (pinfo, insn_addr) | |
1179 | && phys_page != insn_page | |
1180 | && !(e_flags & E_M68HC11_NO_BANK_WARNING)) | |
1181 | { | |
1182 | if (!reloc_warning (info, name, input_bfd, input_section, rel, | |
1183 | _("banked address [%lx:%04lx] (%lx) is not " | |
1184 | "in the same bank as current banked " | |
1185 | "address [%lx:%04lx] (%lx)"), | |
1186 | (long) phys_page, (long) phys_addr, | |
1187 | (long) (relocation + rel->r_addend), | |
1188 | (long) insn_page, | |
1189 | (long) m68hc11_phys_addr (pinfo, insn_addr), | |
1190 | (long) insn_addr)) | |
1191 | return FALSE; | |
1192 | break; | |
1193 | } | |
1194 | ||
1195 | if (phys_page != 0 && insn_page == 0) | |
1196 | { | |
1197 | if (!reloc_warning (info, name, input_bfd, input_section, rel, | |
1198 | _("reference to a banked address [%lx:%04lx] " | |
1199 | "in the normal address space at %04lx"), | |
1200 | (long) phys_page, (long) phys_addr, | |
1201 | (long) insn_addr)) | |
1202 | return FALSE; | |
1203 | relocation = phys_addr; | |
1204 | break; | |
1205 | } | |
1206 | ||
1207 | /* If this is a banked address use the phys_addr so that | |
1208 | we stay in the banked window. */ | |
1209 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)) | |
1210 | relocation = phys_addr; | |
1211 | break; | |
1212 | } | |
1213 | ||
1214 | /* If we are linking an XGATE instruction against an S12 symbol, we | |
1215 | need to change the offset of the symbol value so that it's correct | |
1216 | from the XGATE's perspective. */ | |
1217 | if (!strcmp (howto->name, "R_XGATE_IMM8_LO") | |
1218 | || !strcmp (howto->name, "R_XGATE_IMM8_HI")) | |
1219 | { | |
1220 | /* We can only offset S12 addresses that lie within the non-paged | |
1221 | area of RAM. */ | |
1222 | if (!is_xgate_symbol && !is_section_symbol) | |
1223 | { | |
1224 | /* The ram in the global space is mapped to 0x2000 and stops at | |
1225 | 0x4000 in the 16-bit address space for S12 and 0xE000 in the | |
1226 | 16-bit address space for XGATE. */ | |
1227 | if (relocation >= 0x2000 && relocation < 0x4000) | |
1228 | /* We offset the address by the difference | |
1229 | between these two mappings. */ | |
1230 | relocation += 0xC000; | |
1231 | else | |
1232 | { | |
1233 | if (!reloc_warning (info, name, input_bfd, input_section, rel, | |
1234 | _("S12 address (%lx) is not within " | |
1235 | "shared RAM(0x2000-0x4000), therefore " | |
1236 | "you must manually offset the address " | |
1237 | "in your code"), (long) phys_addr)) | |
1238 | return FALSE; | |
1239 | break; | |
1240 | } | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | if (r_type != R_M68HC11_NONE) | |
1245 | { | |
1246 | if ((r_type == R_M68HC12_PCREL_9) || (r_type == R_M68HC12_PCREL_10)) | |
1247 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1248 | contents, rel->r_offset, | |
1249 | relocation - 2, rel->r_addend); | |
1250 | else | |
1251 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1252 | contents, rel->r_offset, | |
1253 | relocation, rel->r_addend); | |
1254 | } | |
1255 | ||
1256 | if (r != bfd_reloc_ok) | |
1257 | { | |
1258 | switch (r) | |
1259 | { | |
1260 | case bfd_reloc_overflow: | |
1261 | (*info->callbacks->reloc_overflow) | |
1262 | (info, NULL, name, howto->name, (bfd_vma) 0, | |
1263 | input_bfd, input_section, rel->r_offset); | |
1264 | break; | |
1265 | ||
1266 | case bfd_reloc_undefined: | |
1267 | (*info->callbacks->undefined_symbol) | |
1268 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
1269 | break; | |
1270 | ||
1271 | case bfd_reloc_outofrange: | |
1272 | msg = _ ("internal error: out of range error"); | |
1273 | goto common_error; | |
1274 | ||
1275 | case bfd_reloc_notsupported: | |
1276 | msg = _ ("internal error: unsupported relocation error"); | |
1277 | goto common_error; | |
1278 | ||
1279 | case bfd_reloc_dangerous: | |
1280 | msg = _ ("internal error: dangerous error"); | |
1281 | goto common_error; | |
1282 | ||
1283 | default: | |
1284 | msg = _ ("internal error: unknown error"); | |
1285 | /* fall through */ | |
1286 | ||
1287 | common_error: | |
1288 | (*info->callbacks->warning) (info, msg, name, input_bfd, | |
1289 | input_section, rel->r_offset); | |
1290 | break; | |
1291 | } | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | return TRUE; | |
1296 | } | |
1297 | ||
1298 | ||
1299 | \f | |
1300 | /* Set and control ELF flags in ELF header. */ | |
1301 | ||
1302 | bfd_boolean | |
1303 | _bfd_m68hc11_elf_set_private_flags (bfd *abfd, flagword flags) | |
1304 | { | |
1305 | BFD_ASSERT (!elf_flags_init (abfd) | |
1306 | || elf_elfheader (abfd)->e_flags == flags); | |
1307 | ||
1308 | elf_elfheader (abfd)->e_flags = flags; | |
1309 | elf_flags_init (abfd) = TRUE; | |
1310 | return TRUE; | |
1311 | } | |
1312 | ||
1313 | /* Merge backend specific data from an object file to the output | |
1314 | object file when linking. */ | |
1315 | ||
1316 | bfd_boolean | |
1317 | _bfd_m68hc11_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) | |
1318 | { | |
1319 | bfd *obfd = info->output_bfd; | |
1320 | flagword old_flags; | |
1321 | flagword new_flags; | |
1322 | bfd_boolean ok = TRUE; | |
1323 | ||
1324 | /* Check if we have the same endianness */ | |
1325 | if (!_bfd_generic_verify_endian_match (ibfd, info)) | |
1326 | return FALSE; | |
1327 | ||
1328 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1329 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1330 | return TRUE; | |
1331 | ||
1332 | new_flags = elf_elfheader (ibfd)->e_flags; | |
1333 | elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI; | |
1334 | old_flags = elf_elfheader (obfd)->e_flags; | |
1335 | ||
1336 | if (! elf_flags_init (obfd)) | |
1337 | { | |
1338 | elf_flags_init (obfd) = TRUE; | |
1339 | elf_elfheader (obfd)->e_flags = new_flags; | |
1340 | elf_elfheader (obfd)->e_ident[EI_CLASS] | |
1341 | = elf_elfheader (ibfd)->e_ident[EI_CLASS]; | |
1342 | ||
1343 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
1344 | && bfd_get_arch_info (obfd)->the_default) | |
1345 | { | |
1346 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
1347 | bfd_get_mach (ibfd))) | |
1348 | return FALSE; | |
1349 | } | |
1350 | ||
1351 | return TRUE; | |
1352 | } | |
1353 | ||
1354 | /* Check ABI compatibility. */ | |
1355 | if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) | |
1356 | { | |
1357 | _bfd_error_handler | |
1358 | (_("%pB: linking files compiled for 16-bit integers (-mshort) " | |
1359 | "and others for 32-bit integers"), ibfd); | |
1360 | ok = FALSE; | |
1361 | } | |
1362 | if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) | |
1363 | { | |
1364 | _bfd_error_handler | |
1365 | (_("%pB: linking files compiled for 32-bit double (-fshort-double) " | |
1366 | "and others for 64-bit double"), ibfd); | |
1367 | ok = FALSE; | |
1368 | } | |
1369 | ||
1370 | /* Processor compatibility. */ | |
1371 | if (!EF_M68HC11_CAN_MERGE_MACH (new_flags, old_flags)) | |
1372 | { | |
1373 | _bfd_error_handler | |
1374 | (_("%pB: linking files compiled for HCS12 with " | |
1375 | "others compiled for HC12"), ibfd); | |
1376 | ok = FALSE; | |
1377 | } | |
1378 | new_flags = ((new_flags & ~EF_M68HC11_MACH_MASK) | |
1379 | | (EF_M68HC11_MERGE_MACH (new_flags, old_flags))); | |
1380 | ||
1381 | elf_elfheader (obfd)->e_flags = new_flags; | |
1382 | ||
1383 | new_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); | |
1384 | old_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); | |
1385 | ||
1386 | /* Warn about any other mismatches */ | |
1387 | if (new_flags != old_flags) | |
1388 | { | |
1389 | _bfd_error_handler | |
1390 | /* xgettext:c-format */ | |
1391 | (_("%pB: uses different e_flags (%#x) fields than previous modules (%#x)"), | |
1392 | ibfd, new_flags, old_flags); | |
1393 | ok = FALSE; | |
1394 | } | |
1395 | ||
1396 | if (! ok) | |
1397 | { | |
1398 | bfd_set_error (bfd_error_bad_value); | |
1399 | return FALSE; | |
1400 | } | |
1401 | ||
1402 | return TRUE; | |
1403 | } | |
1404 | ||
1405 | bfd_boolean | |
1406 | _bfd_m68hc11_elf_print_private_bfd_data (bfd *abfd, void *ptr) | |
1407 | { | |
1408 | FILE *file = (FILE *) ptr; | |
1409 | ||
1410 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
1411 | ||
1412 | /* Print normal ELF private data. */ | |
1413 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
1414 | ||
1415 | /* xgettext:c-format */ | |
1416 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
1417 | ||
1418 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) | |
1419 | fprintf (file, _("[abi=32-bit int, ")); | |
1420 | else | |
1421 | fprintf (file, _("[abi=16-bit int, ")); | |
1422 | ||
1423 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) | |
1424 | fprintf (file, _("64-bit double, ")); | |
1425 | else | |
1426 | fprintf (file, _("32-bit double, ")); | |
1427 | ||
1428 | if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0) | |
1429 | fprintf (file, _("cpu=HC11]")); | |
1430 | else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH) | |
1431 | fprintf (file, _("cpu=HCS12]")); | |
1432 | else | |
1433 | fprintf (file, _("cpu=HC12]")); | |
1434 | ||
1435 | if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS) | |
1436 | fprintf (file, _(" [memory=bank-model]")); | |
1437 | else | |
1438 | fprintf (file, _(" [memory=flat]")); | |
1439 | ||
1440 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_XGATE_RAMOFFSET) | |
1441 | fprintf (file, _(" [XGATE RAM offsetting]")); | |
1442 | ||
1443 | fputc ('\n', file); | |
1444 | ||
1445 | return TRUE; | |
1446 | } | |
1447 | ||
1448 | static void scan_sections_for_abi (bfd *abfd ATTRIBUTE_UNUSED, | |
1449 | asection *asect, void *arg) | |
1450 | { | |
1451 | struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg; | |
1452 | ||
1453 | if (asect->vma >= p->pinfo->bank_virtual) | |
1454 | p->use_memory_banks = TRUE; | |
1455 | } | |
1456 | ||
1457 | /* Tweak the OSABI field of the elf header. */ | |
1458 | ||
1459 | bfd_boolean | |
1460 | elf32_m68hc11_init_file_header (bfd *abfd, struct bfd_link_info *link_info) | |
1461 | { | |
1462 | struct m68hc11_scan_param param; | |
1463 | struct m68hc11_elf_link_hash_table *htab; | |
1464 | ||
1465 | if (!_bfd_elf_init_file_header (abfd, link_info)) | |
1466 | return FALSE; | |
1467 | ||
1468 | if (link_info == NULL) | |
1469 | return TRUE; | |
1470 | ||
1471 | htab = m68hc11_elf_hash_table (link_info); | |
1472 | if (htab == NULL) | |
1473 | return TRUE; | |
1474 | ||
1475 | m68hc11_elf_get_bank_parameters (link_info); | |
1476 | ||
1477 | param.use_memory_banks = FALSE; | |
1478 | param.pinfo = & htab->pinfo; | |
1479 | ||
1480 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); | |
1481 | ||
1482 | if (param.use_memory_banks) | |
1483 | { | |
1484 | Elf_Internal_Ehdr * i_ehdrp; | |
1485 | ||
1486 | i_ehdrp = elf_elfheader (abfd); | |
1487 | i_ehdrp->e_flags |= E_M68HC12_BANKS; | |
1488 | } | |
1489 | return TRUE; | |
1490 | } |