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3a65329d SC |
1 | /* Motorola 68HC11/HC12-specific support for 32-bit ELF |
2 | Copyright 1999, 2000, 2001, 2002, 2003 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf32-m68hc1x.h" | |
27 | #include "elf/m68hc11.h" | |
28 | #include "opcode/m68hc11.h" | |
29 | ||
30 | ||
31 | #define m68hc12_stub_hash_lookup(table, string, create, copy) \ | |
32 | ((struct elf32_m68hc11_stub_hash_entry *) \ | |
33 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
34 | ||
35 | static struct elf32_m68hc11_stub_hash_entry* m68hc12_add_stub | |
36 | PARAMS((const char *stub_name, | |
37 | asection *section, | |
38 | struct m68hc11_elf_link_hash_table *htab)); | |
39 | ||
40 | static struct bfd_hash_entry *stub_hash_newfunc | |
41 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
42 | ||
43 | static void m68hc11_elf_set_symbol | |
44 | PARAMS ((bfd* abfd, struct bfd_link_info *info, | |
45 | const char* name, bfd_vma value, asection* sec)); | |
46 | ||
47 | static bfd_boolean m68hc11_elf_export_one_stub | |
48 | PARAMS((struct bfd_hash_entry *gen_entry, PTR in_arg)); | |
49 | ||
50 | static bfd_boolean m68hc11_get_relocation_value | |
51 | PARAMS ((bfd* abfd, | |
52 | struct bfd_link_info* info, | |
53 | asection **local_sections, | |
54 | Elf_Internal_Sym* local_syms, | |
55 | Elf_Internal_Rela* rel, | |
56 | const char** name, | |
57 | bfd_vma* relocation, | |
58 | bfd_boolean* is_far)); | |
59 | ||
60 | static void scan_sections_for_abi PARAMS ((bfd*, asection*, PTR)); | |
61 | ||
62 | struct m68hc11_scan_param | |
63 | { | |
64 | struct m68hc11_page_info* pinfo; | |
65 | bfd_boolean use_memory_banks; | |
66 | }; | |
67 | ||
68 | ||
69 | /* Create a 68HC11/68HC12 ELF linker hash table. */ | |
70 | ||
71 | struct m68hc11_elf_link_hash_table* | |
72 | m68hc11_elf_hash_table_create (abfd) | |
73 | bfd *abfd; | |
74 | { | |
75 | struct m68hc11_elf_link_hash_table *ret; | |
76 | bfd_size_type amt = sizeof (struct m68hc11_elf_link_hash_table); | |
77 | ||
78 | ret = (struct m68hc11_elf_link_hash_table *) bfd_zalloc (abfd, amt); | |
79 | if (ret == (struct m68hc11_elf_link_hash_table *) NULL) | |
80 | return NULL; | |
81 | ||
82 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
83 | _bfd_elf_link_hash_newfunc)) | |
84 | { | |
85 | bfd_release (abfd, ret); | |
86 | return NULL; | |
87 | } | |
88 | ||
89 | /* Init the stub hash table too. */ | |
90 | amt = sizeof (struct bfd_hash_table); | |
91 | ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt); | |
92 | if (ret->stub_hash_table == NULL) | |
93 | { | |
94 | bfd_release (abfd, ret); | |
95 | return NULL; | |
96 | } | |
97 | if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc)) | |
98 | return NULL; | |
99 | ||
100 | ret->stub_bfd = NULL; | |
101 | ret->stub_section = 0; | |
102 | ret->add_stub_section = NULL; | |
103 | ret->sym_sec.abfd = NULL; | |
104 | ||
105 | return ret; | |
106 | } | |
107 | ||
108 | /* Free the derived linker hash table. */ | |
109 | ||
110 | void | |
111 | m68hc11_elf_bfd_link_hash_table_free (hash) | |
112 | struct bfd_link_hash_table *hash; | |
113 | { | |
114 | struct m68hc11_elf_link_hash_table *ret | |
115 | = (struct m68hc11_elf_link_hash_table *) hash; | |
116 | ||
117 | bfd_hash_table_free (ret->stub_hash_table); | |
118 | free (ret->stub_hash_table); | |
119 | _bfd_generic_link_hash_table_free (hash); | |
120 | } | |
121 | ||
122 | /* Assorted hash table functions. */ | |
123 | ||
124 | /* Initialize an entry in the stub hash table. */ | |
125 | ||
126 | static struct bfd_hash_entry * | |
127 | stub_hash_newfunc (entry, table, string) | |
128 | struct bfd_hash_entry *entry; | |
129 | struct bfd_hash_table *table; | |
130 | const char *string; | |
131 | { | |
132 | /* Allocate the structure if it has not already been allocated by a | |
133 | subclass. */ | |
134 | if (entry == NULL) | |
135 | { | |
136 | entry = bfd_hash_allocate (table, | |
137 | sizeof (struct elf32_m68hc11_stub_hash_entry)); | |
138 | if (entry == NULL) | |
139 | return entry; | |
140 | } | |
141 | ||
142 | /* Call the allocation method of the superclass. */ | |
143 | entry = bfd_hash_newfunc (entry, table, string); | |
144 | if (entry != NULL) | |
145 | { | |
146 | struct elf32_m68hc11_stub_hash_entry *eh; | |
147 | ||
148 | /* Initialize the local fields. */ | |
149 | eh = (struct elf32_m68hc11_stub_hash_entry *) entry; | |
150 | eh->stub_sec = NULL; | |
151 | eh->stub_offset = 0; | |
152 | eh->target_value = 0; | |
153 | eh->target_section = NULL; | |
154 | } | |
155 | ||
156 | return entry; | |
157 | } | |
158 | ||
159 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
160 | stub entry are initialised. */ | |
161 | ||
162 | static struct elf32_m68hc11_stub_hash_entry * | |
163 | m68hc12_add_stub (stub_name, section, htab) | |
164 | const char *stub_name; | |
165 | asection *section; | |
166 | struct m68hc11_elf_link_hash_table *htab; | |
167 | { | |
168 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
169 | ||
170 | /* Enter this entry into the linker stub hash table. */ | |
171 | stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name, | |
172 | TRUE, FALSE); | |
173 | if (stub_entry == NULL) | |
174 | { | |
175 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), | |
176 | bfd_archive_filename (section->owner), | |
177 | stub_name); | |
178 | return NULL; | |
179 | } | |
180 | ||
181 | if (htab->stub_section == 0) | |
182 | { | |
183 | htab->stub_section = (*htab->add_stub_section) (".tramp", | |
184 | htab->tramp_section); | |
185 | } | |
186 | ||
187 | stub_entry->stub_sec = htab->stub_section; | |
188 | stub_entry->stub_offset = 0; | |
189 | return stub_entry; | |
190 | } | |
191 | ||
192 | /* Hook called by the linker routine which adds symbols from an object | |
193 | file. We use it for identify far symbols and force a loading of | |
194 | the trampoline handler. */ | |
195 | ||
196 | bfd_boolean | |
197 | elf32_m68hc11_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) | |
198 | bfd *abfd; | |
199 | struct bfd_link_info *info; | |
200 | const Elf_Internal_Sym *sym; | |
201 | const char **namep ATTRIBUTE_UNUSED; | |
202 | flagword *flagsp ATTRIBUTE_UNUSED; | |
203 | asection **secp ATTRIBUTE_UNUSED; | |
204 | bfd_vma *valp ATTRIBUTE_UNUSED; | |
205 | { | |
206 | if (sym->st_other & STO_M68HC12_FAR) | |
207 | { | |
208 | struct elf_link_hash_entry *h; | |
209 | ||
210 | h = (struct elf_link_hash_entry *) | |
211 | bfd_link_hash_lookup (info->hash, "__far_trampoline", | |
212 | FALSE, FALSE, FALSE); | |
213 | if (h == NULL) | |
214 | { | |
215 | struct bfd_link_hash_entry* entry = NULL; | |
216 | ||
217 | _bfd_generic_link_add_one_symbol (info, abfd, | |
218 | "__far_trampoline", | |
219 | BSF_GLOBAL, | |
220 | bfd_und_section_ptr, | |
221 | (bfd_vma) 0, (const char*) NULL, | |
222 | FALSE, FALSE, &entry); | |
223 | } | |
224 | ||
225 | } | |
226 | return TRUE; | |
227 | } | |
228 | ||
229 | /* External entry points for sizing and building linker stubs. */ | |
230 | ||
231 | /* Set up various things so that we can make a list of input sections | |
232 | for each output section included in the link. Returns -1 on error, | |
233 | 0 when no stubs will be needed, and 1 on success. */ | |
234 | ||
235 | int | |
236 | elf32_m68hc11_setup_section_lists (output_bfd, info) | |
237 | bfd *output_bfd; | |
238 | struct bfd_link_info *info; | |
239 | { | |
240 | bfd *input_bfd; | |
241 | unsigned int bfd_count; | |
242 | int top_id, top_index; | |
243 | asection *section; | |
244 | asection **input_list, **list; | |
245 | bfd_size_type amt; | |
246 | asection *text_section; | |
247 | struct m68hc11_elf_link_hash_table *htab; | |
248 | ||
249 | htab = m68hc11_elf_hash_table (info); | |
250 | ||
251 | if (htab->root.root.creator->flavour != bfd_target_elf_flavour) | |
252 | return 0; | |
253 | ||
254 | /* Count the number of input BFDs and find the top input section id. | |
255 | Also search for an existing ".tramp" section so that we know | |
256 | where generated trampolines must go. Default to ".text" if we | |
257 | can't find it. */ | |
258 | htab->tramp_section = 0; | |
259 | text_section = 0; | |
260 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
261 | input_bfd != NULL; | |
262 | input_bfd = input_bfd->link_next) | |
263 | { | |
264 | bfd_count += 1; | |
265 | for (section = input_bfd->sections; | |
266 | section != NULL; | |
267 | section = section->next) | |
268 | { | |
269 | const char* name = bfd_get_section_name (input_bfd, section); | |
270 | ||
271 | if (!strcmp (name, ".tramp")) | |
272 | htab->tramp_section = section; | |
273 | ||
274 | if (!strcmp (name, ".text")) | |
275 | text_section = section; | |
276 | ||
277 | if (top_id < section->id) | |
278 | top_id = section->id; | |
279 | } | |
280 | } | |
281 | htab->bfd_count = bfd_count; | |
282 | if (htab->tramp_section == 0) | |
283 | htab->tramp_section = text_section; | |
284 | ||
285 | /* We can't use output_bfd->section_count here to find the top output | |
286 | section index as some sections may have been removed, and | |
287 | _bfd_strip_section_from_output doesn't renumber the indices. */ | |
288 | for (section = output_bfd->sections, top_index = 0; | |
289 | section != NULL; | |
290 | section = section->next) | |
291 | { | |
292 | if (top_index < section->index) | |
293 | top_index = section->index; | |
294 | } | |
295 | ||
296 | htab->top_index = top_index; | |
297 | amt = sizeof (asection *) * (top_index + 1); | |
298 | input_list = (asection **) bfd_malloc (amt); | |
299 | htab->input_list = input_list; | |
300 | if (input_list == NULL) | |
301 | return -1; | |
302 | ||
303 | /* For sections we aren't interested in, mark their entries with a | |
304 | value we can check later. */ | |
305 | list = input_list + top_index; | |
306 | do | |
307 | *list = bfd_abs_section_ptr; | |
308 | while (list-- != input_list); | |
309 | ||
310 | for (section = output_bfd->sections; | |
311 | section != NULL; | |
312 | section = section->next) | |
313 | { | |
314 | if ((section->flags & SEC_CODE) != 0) | |
315 | input_list[section->index] = NULL; | |
316 | } | |
317 | ||
318 | return 1; | |
319 | } | |
320 | ||
321 | /* Determine and set the size of the stub section for a final link. | |
322 | ||
323 | The basic idea here is to examine all the relocations looking for | |
324 | PC-relative calls to a target that is unreachable with a "bl" | |
325 | instruction. */ | |
326 | ||
327 | bfd_boolean | |
328 | elf32_m68hc11_size_stubs (output_bfd, stub_bfd, info, add_stub_section) | |
329 | bfd *output_bfd; | |
330 | bfd *stub_bfd; | |
331 | struct bfd_link_info *info; | |
332 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); | |
333 | { | |
334 | bfd *input_bfd; | |
335 | asection *section; | |
336 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
337 | unsigned int bfd_indx, bfd_count; | |
338 | bfd_size_type amt; | |
339 | asection *stub_sec; | |
340 | ||
341 | struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info); | |
342 | ||
343 | /* Stash our params away. */ | |
344 | htab->stub_bfd = stub_bfd; | |
345 | htab->add_stub_section = add_stub_section; | |
346 | ||
347 | /* Count the number of input BFDs and find the top input section id. */ | |
348 | for (input_bfd = info->input_bfds, bfd_count = 0; | |
349 | input_bfd != NULL; | |
350 | input_bfd = input_bfd->link_next) | |
351 | { | |
352 | bfd_count += 1; | |
353 | } | |
354 | ||
355 | /* We want to read in symbol extension records only once. To do this | |
356 | we need to read in the local symbols in parallel and save them for | |
357 | later use; so hold pointers to the local symbols in an array. */ | |
358 | amt = sizeof (Elf_Internal_Sym *) * bfd_count; | |
359 | all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); | |
360 | if (all_local_syms == NULL) | |
361 | return FALSE; | |
362 | ||
363 | /* Walk over all the input BFDs, swapping in local symbols. */ | |
364 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
365 | input_bfd != NULL; | |
366 | input_bfd = input_bfd->link_next, bfd_indx++) | |
367 | { | |
368 | Elf_Internal_Shdr *symtab_hdr; | |
369 | Elf_Internal_Shdr *shndx_hdr; | |
370 | Elf_Internal_Sym *isym; | |
371 | Elf32_External_Sym *extsyms, *esym, *end_sy; | |
372 | Elf_External_Sym_Shndx *shndx_buf, *shndx; | |
373 | bfd_size_type sec_size; | |
374 | ||
375 | /* We'll need the symbol table in a second. */ | |
376 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
377 | if (symtab_hdr->sh_info == 0) | |
378 | continue; | |
379 | ||
380 | /* We need an array of the local symbols attached to the input bfd. | |
381 | Unfortunately, we're going to have to read & swap them in. */ | |
382 | sec_size = symtab_hdr->sh_info; | |
383 | sec_size *= sizeof (Elf_Internal_Sym); | |
384 | local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size); | |
385 | if (local_syms == NULL) | |
386 | goto error_ret_free_local; | |
387 | ||
388 | all_local_syms[bfd_indx] = local_syms; | |
389 | sec_size = symtab_hdr->sh_info; | |
390 | sec_size *= sizeof (Elf32_External_Sym); | |
391 | ||
392 | /* Get the cached copy. */ | |
393 | if (symtab_hdr->contents != NULL) | |
394 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
395 | else | |
396 | { | |
397 | /* Go get them off disk. */ | |
398 | bfd_size_type amt = symtab_hdr->sh_size; | |
399 | extsyms = (Elf32_External_Sym *) bfd_malloc (amt); | |
400 | if (extsyms == NULL) | |
401 | goto error_ret_free_local; | |
402 | ||
403 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
404 | || bfd_bread ((PTR) extsyms, amt, input_bfd) != amt) | |
405 | { | |
406 | error_ret_free_ext_syms: | |
407 | free (extsyms); | |
408 | goto error_ret_free_local; | |
409 | } | |
410 | } | |
411 | shndx_buf = NULL; | |
412 | shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr; | |
413 | if (shndx_hdr->sh_size != 0) | |
414 | { | |
415 | bfd_size_type amt; | |
416 | ||
417 | amt = symtab_hdr->sh_info * sizeof (Elf_External_Sym_Shndx); | |
418 | shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
419 | if (shndx_buf == NULL) | |
420 | goto error_ret_free_ext_syms; | |
421 | if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0 | |
422 | || bfd_bread ((PTR) shndx_buf, amt, input_bfd) != amt) | |
423 | { | |
424 | free (shndx_buf); | |
425 | goto error_ret_free_ext_syms; | |
426 | } | |
427 | shndx_hdr->contents = (PTR) shndx_buf; | |
428 | } | |
429 | ||
430 | /* Swap the local symbols in. */ | |
431 | for (esym = extsyms, end_sy = esym + symtab_hdr->sh_info, | |
432 | isym = local_syms, shndx = shndx_buf; | |
433 | esym < end_sy; | |
434 | esym++, isym++, shndx = (shndx ? shndx + 1 : NULL)) | |
435 | bfd_elf32_swap_symbol_in (input_bfd, esym, shndx, isym); | |
436 | ||
437 | /* Now we can free the external symbols. */ | |
438 | free (shndx_buf); | |
439 | } | |
440 | ||
441 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
442 | input_bfd != NULL; | |
443 | input_bfd = input_bfd->link_next, bfd_indx++) | |
444 | { | |
445 | Elf_Internal_Shdr *symtab_hdr; | |
446 | Elf_Internal_Sym *local_syms; | |
447 | struct elf_link_hash_entry ** sym_hashes; | |
448 | ||
449 | sym_hashes = elf_sym_hashes (input_bfd); | |
450 | ||
451 | /* We'll need the symbol table in a second. */ | |
452 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
453 | if (symtab_hdr->sh_info == 0) | |
454 | continue; | |
455 | ||
456 | local_syms = all_local_syms[bfd_indx]; | |
457 | ||
458 | /* Walk over each section attached to the input bfd. */ | |
459 | for (section = input_bfd->sections; | |
460 | section != NULL; | |
461 | section = section->next) | |
462 | { | |
463 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
464 | ||
465 | /* If there aren't any relocs, then there's nothing more | |
466 | to do. */ | |
467 | if ((section->flags & SEC_RELOC) == 0 | |
468 | || section->reloc_count == 0) | |
469 | continue; | |
470 | ||
471 | /* If this section is a link-once section that will be | |
472 | discarded, then don't create any stubs. */ | |
473 | if (section->output_section == NULL | |
474 | || section->output_section->owner != output_bfd) | |
475 | continue; | |
476 | ||
477 | /* Get the relocs. */ | |
478 | internal_relocs | |
45d6a902 AM |
479 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
480 | (Elf_Internal_Rela *) NULL, | |
481 | info->keep_memory); | |
3a65329d SC |
482 | if (internal_relocs == NULL) |
483 | goto error_ret_free_local; | |
484 | ||
485 | /* Now examine each relocation. */ | |
486 | irela = internal_relocs; | |
487 | irelaend = irela + section->reloc_count; | |
488 | for (; irela < irelaend; irela++) | |
489 | { | |
490 | unsigned int r_type, r_indx; | |
491 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
492 | asection *sym_sec; | |
493 | bfd_vma sym_value; | |
494 | struct elf_link_hash_entry *hash; | |
495 | const char *stub_name; | |
496 | Elf_Internal_Sym *sym; | |
497 | ||
498 | r_type = ELF32_R_TYPE (irela->r_info); | |
499 | ||
500 | /* Only look at 16-bit relocs. */ | |
501 | if (r_type != (unsigned int) R_M68HC11_16) | |
502 | continue; | |
503 | ||
504 | /* Now determine the call target, its name, value, | |
505 | section. */ | |
506 | r_indx = ELF32_R_SYM (irela->r_info); | |
507 | if (r_indx < symtab_hdr->sh_info) | |
508 | { | |
509 | /* It's a local symbol. */ | |
510 | Elf_Internal_Shdr *hdr; | |
511 | bfd_boolean is_far; | |
512 | ||
513 | sym = local_syms + r_indx; | |
514 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
515 | sym_sec = hdr->bfd_section; | |
516 | is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); | |
517 | if (!is_far) | |
518 | continue; | |
519 | stub_name = (bfd_elf_string_from_elf_section | |
520 | (input_bfd, symtab_hdr->sh_link, | |
521 | sym->st_name)); | |
522 | sym_value = sym->st_value; | |
523 | hash = NULL; | |
524 | } | |
525 | else | |
526 | { | |
527 | /* It's an external symbol. */ | |
528 | int e_indx; | |
529 | ||
530 | e_indx = r_indx - symtab_hdr->sh_info; | |
531 | hash = (struct elf_link_hash_entry *) | |
532 | (sym_hashes[e_indx]); | |
533 | ||
534 | while (hash->root.type == bfd_link_hash_indirect | |
535 | || hash->root.type == bfd_link_hash_warning) | |
536 | hash = ((struct elf_link_hash_entry *) | |
537 | hash->root.u.i.link); | |
538 | ||
539 | if (hash->root.type == bfd_link_hash_defined | |
540 | || hash->root.type == bfd_link_hash_defweak) | |
541 | { | |
542 | if (!(hash->other & STO_M68HC12_FAR)) | |
543 | continue; | |
544 | } | |
545 | else if (hash->root.type == bfd_link_hash_undefweak) | |
546 | { | |
547 | continue; | |
548 | } | |
549 | else if (hash->root.type == bfd_link_hash_undefined) | |
550 | { | |
551 | continue; | |
552 | } | |
553 | else | |
554 | { | |
555 | bfd_set_error (bfd_error_bad_value); | |
556 | goto error_ret_free_internal; | |
557 | } | |
558 | sym_sec = hash->root.u.def.section; | |
559 | sym_value = hash->root.u.def.value; | |
560 | stub_name = hash->root.root.string; | |
561 | } | |
562 | ||
563 | if (!stub_name) | |
564 | goto error_ret_free_internal; | |
565 | ||
566 | stub_entry = m68hc12_stub_hash_lookup | |
567 | (htab->stub_hash_table, | |
568 | stub_name, | |
569 | FALSE, FALSE); | |
570 | if (stub_entry == NULL) | |
571 | { | |
572 | if (add_stub_section == 0) | |
573 | continue; | |
574 | ||
575 | stub_entry = m68hc12_add_stub (stub_name, section, htab); | |
576 | if (stub_entry == NULL) | |
577 | { | |
578 | error_ret_free_internal: | |
579 | if (elf_section_data (section)->relocs == NULL) | |
580 | free (internal_relocs); | |
581 | goto error_ret_free_local; | |
582 | } | |
583 | } | |
584 | ||
585 | stub_entry->target_value = sym_value; | |
586 | stub_entry->target_section = sym_sec; | |
587 | } | |
588 | ||
589 | /* We're done with the internal relocs, free them. */ | |
590 | if (elf_section_data (section)->relocs == NULL) | |
591 | free (internal_relocs); | |
592 | } | |
593 | } | |
594 | ||
595 | if (add_stub_section) | |
596 | { | |
597 | /* OK, we've added some stubs. Find out the new size of the | |
598 | stub sections. */ | |
599 | for (stub_sec = htab->stub_bfd->sections; | |
600 | stub_sec != NULL; | |
601 | stub_sec = stub_sec->next) | |
602 | { | |
603 | stub_sec->_raw_size = 0; | |
604 | stub_sec->_cooked_size = 0; | |
605 | } | |
606 | ||
607 | bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab); | |
608 | } | |
609 | free (htab->all_local_syms); | |
610 | return TRUE; | |
611 | ||
612 | error_ret_free_local: | |
613 | free (htab->all_local_syms); | |
614 | return FALSE; | |
615 | } | |
616 | ||
617 | /* Export the trampoline addresses in the symbol table. */ | |
618 | static bfd_boolean | |
619 | m68hc11_elf_export_one_stub (gen_entry, in_arg) | |
620 | struct bfd_hash_entry *gen_entry; | |
621 | PTR in_arg; | |
622 | { | |
623 | struct bfd_link_info *info; | |
624 | struct m68hc11_elf_link_hash_table *htab; | |
625 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
626 | char* name; | |
627 | bfd_boolean result; | |
628 | ||
629 | info = (struct bfd_link_info *) in_arg; | |
630 | htab = m68hc11_elf_hash_table (info); | |
631 | ||
632 | /* Massage our args to the form they really have. */ | |
633 | stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; | |
634 | ||
635 | /* Generate the trampoline according to HC11 or HC12. */ | |
636 | result = (* htab->build_one_stub) (gen_entry, in_arg); | |
637 | ||
638 | /* Make a printable name that does not conflict with the real function. */ | |
639 | name = alloca (strlen (stub_entry->root.string) + 16); | |
640 | sprintf (name, "tramp.%s", stub_entry->root.string); | |
641 | ||
642 | /* Export the symbol for debugging/disassembling. */ | |
643 | m68hc11_elf_set_symbol (htab->stub_bfd, info, name, | |
644 | stub_entry->stub_offset, | |
645 | stub_entry->stub_sec); | |
646 | return result; | |
647 | } | |
648 | ||
649 | /* Export a symbol or set its value and section. */ | |
650 | static void | |
651 | m68hc11_elf_set_symbol (abfd, info, name, value, sec) | |
652 | bfd* abfd; | |
653 | struct bfd_link_info *info; | |
654 | const char* name; | |
655 | bfd_vma value; | |
656 | asection* sec; | |
657 | { | |
658 | struct elf_link_hash_entry *h; | |
659 | ||
660 | h = (struct elf_link_hash_entry *) | |
661 | bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE); | |
662 | if (h == NULL) | |
663 | { | |
664 | _bfd_generic_link_add_one_symbol (info, abfd, | |
665 | name, | |
666 | BSF_GLOBAL, | |
667 | sec, | |
668 | value, | |
669 | (const char*) NULL, | |
670 | TRUE, FALSE, NULL); | |
671 | } | |
672 | else | |
673 | { | |
674 | h->root.type = bfd_link_hash_defined; | |
675 | h->root.u.def.value = value; | |
676 | h->root.u.def.section = sec; | |
677 | } | |
678 | } | |
679 | ||
680 | ||
681 | /* Build all the stubs associated with the current output file. The | |
682 | stubs are kept in a hash table attached to the main linker hash | |
683 | table. This function is called via m68hc12elf_finish in the | |
684 | linker. */ | |
685 | ||
686 | bfd_boolean | |
687 | elf32_m68hc11_build_stubs (abfd, info) | |
688 | bfd* abfd; | |
689 | struct bfd_link_info *info; | |
690 | { | |
691 | asection *stub_sec; | |
692 | struct bfd_hash_table *table; | |
693 | struct m68hc11_elf_link_hash_table *htab; | |
694 | struct m68hc11_scan_param param; | |
695 | ||
696 | m68hc11_elf_get_bank_parameters (info); | |
697 | htab = m68hc11_elf_hash_table (info); | |
698 | ||
699 | for (stub_sec = htab->stub_bfd->sections; | |
700 | stub_sec != NULL; | |
701 | stub_sec = stub_sec->next) | |
702 | { | |
703 | bfd_size_type size; | |
704 | ||
705 | /* Allocate memory to hold the linker stubs. */ | |
706 | size = stub_sec->_raw_size; | |
707 | stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); | |
708 | if (stub_sec->contents == NULL && size != 0) | |
709 | return FALSE; | |
710 | stub_sec->_raw_size = 0; | |
711 | } | |
712 | ||
713 | /* Build the stubs as directed by the stub hash table. */ | |
714 | table = htab->stub_hash_table; | |
715 | bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info); | |
716 | ||
717 | /* Scan the output sections to see if we use the memory banks. | |
718 | If so, export the symbols that define how the memory banks | |
719 | are mapped. This is used by gdb and the simulator to obtain | |
720 | the information. It can be used by programs to burn the eprom | |
721 | at the good addresses. */ | |
722 | param.use_memory_banks = FALSE; | |
723 | param.pinfo = &htab->pinfo; | |
724 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); | |
725 | if (param.use_memory_banks) | |
726 | { | |
727 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME, | |
728 | htab->pinfo.bank_physical, | |
729 | bfd_abs_section_ptr); | |
730 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
731 | htab->pinfo.bank_virtual, | |
732 | bfd_abs_section_ptr); | |
733 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME, | |
734 | htab->pinfo.bank_size, | |
735 | bfd_abs_section_ptr); | |
736 | } | |
737 | ||
738 | return TRUE; | |
739 | } | |
740 | ||
741 | void | |
742 | m68hc11_elf_get_bank_parameters (info) | |
743 | struct bfd_link_info *info; | |
744 | { | |
745 | unsigned i; | |
746 | struct m68hc11_page_info *pinfo; | |
747 | struct bfd_link_hash_entry *h; | |
748 | ||
749 | pinfo = &m68hc11_elf_hash_table (info)->pinfo; | |
750 | if (pinfo->bank_param_initialized) | |
751 | return; | |
752 | ||
753 | pinfo->bank_virtual = M68HC12_BANK_VIRT; | |
754 | pinfo->bank_mask = M68HC12_BANK_MASK; | |
755 | pinfo->bank_physical = M68HC12_BANK_BASE; | |
756 | pinfo->bank_shift = M68HC12_BANK_SHIFT; | |
757 | pinfo->bank_size = 1 << M68HC12_BANK_SHIFT; | |
758 | ||
759 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME, | |
760 | FALSE, FALSE, TRUE); | |
761 | if (h != (struct bfd_link_hash_entry*) NULL | |
762 | && h->type == bfd_link_hash_defined) | |
763 | pinfo->bank_physical = (h->u.def.value | |
764 | + h->u.def.section->output_section->vma | |
765 | + h->u.def.section->output_offset); | |
766 | ||
767 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
768 | FALSE, FALSE, TRUE); | |
769 | if (h != (struct bfd_link_hash_entry*) NULL | |
770 | && h->type == bfd_link_hash_defined) | |
771 | pinfo->bank_virtual = (h->u.def.value | |
772 | + h->u.def.section->output_section->vma | |
773 | + h->u.def.section->output_offset); | |
774 | ||
775 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME, | |
776 | FALSE, FALSE, TRUE); | |
777 | if (h != (struct bfd_link_hash_entry*) NULL | |
778 | && h->type == bfd_link_hash_defined) | |
779 | pinfo->bank_size = (h->u.def.value | |
780 | + h->u.def.section->output_section->vma | |
781 | + h->u.def.section->output_offset); | |
782 | ||
783 | pinfo->bank_shift = 0; | |
784 | for (i = pinfo->bank_size; i != 0; i >>= 1) | |
785 | pinfo->bank_shift++; | |
786 | pinfo->bank_shift--; | |
787 | pinfo->bank_mask = (1 << pinfo->bank_shift) - 1; | |
788 | pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size; | |
789 | pinfo->bank_param_initialized = 1; | |
790 | ||
791 | h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE, | |
792 | FALSE, TRUE); | |
793 | if (h != (struct bfd_link_hash_entry*) NULL | |
794 | && h->type == bfd_link_hash_defined) | |
795 | pinfo->trampoline_addr = (h->u.def.value | |
796 | + h->u.def.section->output_section->vma | |
797 | + h->u.def.section->output_offset); | |
798 | } | |
799 | ||
800 | /* Return 1 if the address is in banked memory. | |
801 | This can be applied to a virtual address and to a physical address. */ | |
802 | int | |
803 | m68hc11_addr_is_banked (pinfo, addr) | |
804 | struct m68hc11_page_info *pinfo; | |
805 | bfd_vma addr; | |
806 | { | |
807 | if (addr >= pinfo->bank_virtual) | |
808 | return 1; | |
809 | ||
810 | if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end) | |
811 | return 1; | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | /* Return the physical address seen by the processor, taking | |
817 | into account banked memory. */ | |
818 | bfd_vma | |
819 | m68hc11_phys_addr (pinfo, addr) | |
820 | struct m68hc11_page_info *pinfo; | |
821 | bfd_vma addr; | |
822 | { | |
823 | if (addr < pinfo->bank_virtual) | |
824 | return addr; | |
825 | ||
826 | /* Map the address to the memory bank. */ | |
827 | addr -= pinfo->bank_virtual; | |
828 | addr &= pinfo->bank_mask; | |
829 | addr += pinfo->bank_physical; | |
830 | return addr; | |
831 | } | |
832 | ||
833 | /* Return the page number corresponding to an address in banked memory. */ | |
834 | bfd_vma | |
835 | m68hc11_phys_page (pinfo, addr) | |
836 | struct m68hc11_page_info *pinfo; | |
837 | bfd_vma addr; | |
838 | { | |
839 | if (addr < pinfo->bank_virtual) | |
840 | return 0; | |
841 | ||
842 | /* Map the address to the memory bank. */ | |
843 | addr -= pinfo->bank_virtual; | |
844 | addr >>= pinfo->bank_shift; | |
845 | addr &= 0x0ff; | |
846 | return addr; | |
847 | } | |
848 | ||
849 | /* This function is used for relocs which are only used for relaxing, | |
850 | which the linker should otherwise ignore. */ | |
851 | ||
852 | bfd_reloc_status_type | |
853 | m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section, | |
854 | output_bfd, error_message) | |
855 | bfd *abfd ATTRIBUTE_UNUSED; | |
856 | arelent *reloc_entry; | |
857 | asymbol *symbol ATTRIBUTE_UNUSED; | |
858 | PTR data ATTRIBUTE_UNUSED; | |
859 | asection *input_section; | |
860 | bfd *output_bfd; | |
861 | char **error_message ATTRIBUTE_UNUSED; | |
862 | { | |
863 | if (output_bfd != NULL) | |
864 | reloc_entry->address += input_section->output_offset; | |
865 | return bfd_reloc_ok; | |
866 | } | |
867 | ||
868 | bfd_reloc_status_type | |
869 | m68hc11_elf_special_reloc (abfd, reloc_entry, symbol, data, input_section, | |
870 | output_bfd, error_message) | |
871 | bfd *abfd ATTRIBUTE_UNUSED; | |
872 | arelent *reloc_entry; | |
873 | asymbol *symbol; | |
874 | PTR data ATTRIBUTE_UNUSED; | |
875 | asection *input_section; | |
876 | bfd *output_bfd; | |
877 | char **error_message ATTRIBUTE_UNUSED; | |
878 | { | |
879 | if (output_bfd != (bfd *) NULL | |
880 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
881 | && (! reloc_entry->howto->partial_inplace | |
882 | || reloc_entry->addend == 0)) | |
883 | { | |
884 | reloc_entry->address += input_section->output_offset; | |
885 | return bfd_reloc_ok; | |
886 | } | |
887 | ||
888 | if (output_bfd != NULL) | |
889 | return bfd_reloc_continue; | |
890 | ||
891 | if (reloc_entry->address > input_section->_cooked_size) | |
892 | return bfd_reloc_outofrange; | |
893 | ||
894 | abort(); | |
895 | } | |
896 | ||
897 | asection * | |
898 | elf32_m68hc11_gc_mark_hook (sec, info, rel, h, sym) | |
899 | asection *sec; | |
900 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
901 | Elf_Internal_Rela *rel; | |
902 | struct elf_link_hash_entry *h; | |
903 | Elf_Internal_Sym *sym; | |
904 | { | |
905 | if (h != NULL) | |
906 | { | |
907 | switch (ELF32_R_TYPE (rel->r_info)) | |
908 | { | |
909 | default: | |
910 | switch (h->root.type) | |
911 | { | |
912 | case bfd_link_hash_defined: | |
913 | case bfd_link_hash_defweak: | |
914 | return h->root.u.def.section; | |
915 | ||
916 | case bfd_link_hash_common: | |
917 | return h->root.u.c.p->section; | |
918 | ||
919 | default: | |
920 | break; | |
921 | } | |
922 | } | |
923 | } | |
924 | else | |
925 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
926 | ||
927 | return NULL; | |
928 | } | |
929 | ||
930 | bfd_boolean | |
931 | elf32_m68hc11_gc_sweep_hook (abfd, info, sec, relocs) | |
932 | bfd *abfd ATTRIBUTE_UNUSED; | |
933 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
934 | asection *sec ATTRIBUTE_UNUSED; | |
935 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
936 | { | |
937 | /* We don't use got and plt entries for 68hc11/68hc12. */ | |
938 | return TRUE; | |
939 | } | |
940 | ||
941 | /* Look through the relocs for a section during the first phase. | |
942 | Since we don't do .gots or .plts, we just need to consider the | |
943 | virtual table relocs for gc. */ | |
944 | ||
945 | bfd_boolean | |
946 | elf32_m68hc11_check_relocs (abfd, info, sec, relocs) | |
947 | bfd * abfd; | |
948 | struct bfd_link_info * info; | |
949 | asection * sec; | |
950 | const Elf_Internal_Rela * relocs; | |
951 | { | |
952 | Elf_Internal_Shdr * symtab_hdr; | |
953 | struct elf_link_hash_entry ** sym_hashes; | |
954 | struct elf_link_hash_entry ** sym_hashes_end; | |
955 | const Elf_Internal_Rela * rel; | |
956 | const Elf_Internal_Rela * rel_end; | |
957 | ||
958 | if (info->relocateable) | |
959 | return TRUE; | |
960 | ||
961 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
962 | sym_hashes = elf_sym_hashes (abfd); | |
963 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
964 | if (!elf_bad_symtab (abfd)) | |
965 | sym_hashes_end -= symtab_hdr->sh_info; | |
966 | ||
967 | rel_end = relocs + sec->reloc_count; | |
968 | ||
969 | for (rel = relocs; rel < rel_end; rel++) | |
970 | { | |
971 | struct elf_link_hash_entry * h; | |
972 | unsigned long r_symndx; | |
973 | ||
974 | r_symndx = ELF32_R_SYM (rel->r_info); | |
975 | ||
976 | if (r_symndx < symtab_hdr->sh_info) | |
977 | h = NULL; | |
978 | else | |
979 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
980 | ||
981 | switch (ELF32_R_TYPE (rel->r_info)) | |
982 | { | |
983 | /* This relocation describes the C++ object vtable hierarchy. | |
984 | Reconstruct it for later use during GC. */ | |
985 | case R_M68HC11_GNU_VTINHERIT: | |
986 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
987 | return FALSE; | |
988 | break; | |
989 | ||
990 | /* This relocation describes which C++ vtable entries are actually | |
991 | used. Record for later use during GC. */ | |
992 | case R_M68HC11_GNU_VTENTRY: | |
993 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
994 | return FALSE; | |
995 | break; | |
996 | } | |
997 | } | |
998 | ||
999 | return TRUE; | |
1000 | } | |
1001 | ||
1002 | static bfd_boolean | |
1003 | m68hc11_get_relocation_value (abfd, info, local_sections, local_syms, | |
1004 | rel, name, | |
1005 | relocation, is_far) | |
1006 | bfd *abfd; | |
1007 | struct bfd_link_info *info; | |
1008 | asection **local_sections; | |
1009 | Elf_Internal_Sym* local_syms; | |
1010 | Elf_Internal_Rela* rel; | |
1011 | const char** name; | |
1012 | bfd_vma* relocation; | |
1013 | bfd_boolean* is_far; | |
1014 | { | |
1015 | Elf_Internal_Shdr *symtab_hdr; | |
1016 | struct elf_link_hash_entry **sym_hashes; | |
1017 | unsigned long r_symndx; | |
1018 | asection *sec; | |
1019 | struct elf_link_hash_entry *h; | |
1020 | Elf_Internal_Sym *sym; | |
1021 | const char* stub_name = 0; | |
1022 | ||
1023 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1024 | sym_hashes = elf_sym_hashes (abfd); | |
1025 | ||
1026 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1027 | ||
1028 | /* This is a final link. */ | |
1029 | h = NULL; | |
1030 | sym = NULL; | |
1031 | sec = NULL; | |
1032 | if (r_symndx < symtab_hdr->sh_info) | |
1033 | { | |
1034 | sym = local_syms + r_symndx; | |
1035 | sec = local_sections[r_symndx]; | |
1036 | *relocation = (sec->output_section->vma | |
1037 | + sec->output_offset | |
1038 | + sym->st_value); | |
1039 | *is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); | |
1040 | if (*is_far) | |
1041 | stub_name = (bfd_elf_string_from_elf_section | |
1042 | (abfd, symtab_hdr->sh_link, | |
1043 | sym->st_name)); | |
1044 | } | |
1045 | else | |
1046 | { | |
1047 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1048 | while (h->root.type == bfd_link_hash_indirect | |
1049 | || h->root.type == bfd_link_hash_warning) | |
1050 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1051 | if (h->root.type == bfd_link_hash_defined | |
1052 | || h->root.type == bfd_link_hash_defweak) | |
1053 | { | |
1054 | sec = h->root.u.def.section; | |
1055 | *relocation = (h->root.u.def.value | |
1056 | + sec->output_section->vma | |
1057 | + sec->output_offset); | |
1058 | } | |
1059 | else if (h->root.type == bfd_link_hash_undefweak) | |
1060 | *relocation = 0; | |
1061 | else | |
1062 | { | |
1063 | if (!((*info->callbacks->undefined_symbol) | |
1064 | (info, h->root.root.string, abfd, | |
1065 | sec, rel->r_offset, TRUE))) | |
1066 | return FALSE; | |
1067 | *relocation = 0; | |
1068 | } | |
1069 | *is_far = (h && (h->other & STO_M68HC12_FAR)); | |
1070 | stub_name = h->root.root.string; | |
1071 | } | |
1072 | ||
1073 | if (h != NULL) | |
1074 | *name = h->root.root.string; | |
1075 | else | |
1076 | { | |
1077 | *name = (bfd_elf_string_from_elf_section | |
1078 | (abfd, symtab_hdr->sh_link, sym->st_name)); | |
1079 | if (*name == NULL || **name == '\0') | |
1080 | *name = bfd_section_name (input_bfd, sec); | |
1081 | } | |
1082 | ||
1083 | if (*is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16) | |
1084 | { | |
1085 | struct elf32_m68hc11_stub_hash_entry* stub; | |
1086 | struct m68hc11_elf_link_hash_table *htab; | |
1087 | ||
1088 | htab = m68hc11_elf_hash_table (info); | |
1089 | stub = m68hc12_stub_hash_lookup (htab->stub_hash_table, | |
1090 | *name, FALSE, FALSE); | |
1091 | if (stub) | |
1092 | { | |
1093 | *relocation = stub->stub_offset | |
1094 | + stub->stub_sec->output_section->vma | |
1095 | + stub->stub_sec->output_offset; | |
1096 | *is_far = FALSE; | |
1097 | } | |
1098 | } | |
1099 | return TRUE; | |
1100 | } | |
1101 | ||
1102 | /* Relocate a 68hc11/68hc12 ELF section. */ | |
1103 | bfd_boolean | |
1104 | elf32_m68hc11_relocate_section (output_bfd, info, input_bfd, input_section, | |
1105 | contents, relocs, local_syms, local_sections) | |
1106 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
1107 | struct bfd_link_info *info; | |
1108 | bfd *input_bfd; | |
1109 | asection *input_section; | |
1110 | bfd_byte *contents; | |
1111 | Elf_Internal_Rela *relocs; | |
1112 | Elf_Internal_Sym *local_syms; | |
1113 | asection **local_sections; | |
1114 | { | |
1115 | Elf_Internal_Shdr *symtab_hdr; | |
1116 | struct elf_link_hash_entry **sym_hashes; | |
1117 | Elf_Internal_Rela *rel, *relend; | |
1118 | const char *name; | |
1119 | struct m68hc11_page_info *pinfo; | |
1120 | struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd); | |
1121 | ||
1122 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1123 | sym_hashes = elf_sym_hashes (input_bfd); | |
1124 | ||
1125 | /* Get memory bank parameters. */ | |
1126 | m68hc11_elf_get_bank_parameters (info); | |
1127 | pinfo = &m68hc11_elf_hash_table (info)->pinfo; | |
1128 | ||
1129 | rel = relocs; | |
1130 | relend = relocs + input_section->reloc_count; | |
1131 | for (; rel < relend; rel++) | |
1132 | { | |
1133 | int r_type; | |
1134 | arelent arel; | |
1135 | reloc_howto_type *howto; | |
1136 | unsigned long r_symndx; | |
1137 | Elf_Internal_Sym *sym; | |
1138 | asection *sec; | |
1139 | bfd_vma relocation; | |
1140 | bfd_reloc_status_type r = bfd_reloc_undefined; | |
1141 | bfd_vma phys_page; | |
1142 | bfd_vma phys_addr; | |
1143 | bfd_vma insn_addr; | |
1144 | bfd_vma insn_page; | |
1145 | bfd_boolean is_far; | |
1146 | ||
1147 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1148 | r_type = ELF32_R_TYPE (rel->r_info); | |
1149 | ||
1150 | if (r_type == R_M68HC11_GNU_VTENTRY | |
1151 | || r_type == R_M68HC11_GNU_VTINHERIT ) | |
1152 | continue; | |
1153 | ||
1154 | if (info->relocateable) | |
1155 | { | |
1156 | /* This is a relocateable link. We don't have to change | |
1157 | anything, unless the reloc is against a section symbol, | |
1158 | in which case we have to adjust according to where the | |
1159 | section symbol winds up in the output section. */ | |
1160 | if (r_symndx < symtab_hdr->sh_info) | |
1161 | { | |
1162 | sym = local_syms + r_symndx; | |
1163 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1164 | { | |
1165 | sec = local_sections[r_symndx]; | |
1166 | rel->r_addend += sec->output_offset + sym->st_value; | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | continue; | |
1171 | } | |
1172 | (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel); | |
1173 | howto = arel.howto; | |
1174 | ||
1175 | m68hc11_get_relocation_value (input_bfd, info, | |
1176 | local_sections, local_syms, | |
1177 | rel, &name, &relocation, &is_far); | |
1178 | ||
1179 | /* Do the memory bank mapping. */ | |
1180 | phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend); | |
1181 | phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend); | |
1182 | switch (r_type) | |
1183 | { | |
1184 | case R_M68HC11_24: | |
1185 | /* Reloc used by 68HC12 call instruction. */ | |
1186 | bfd_put_16 (input_bfd, phys_addr, | |
1187 | (bfd_byte*) contents + rel->r_offset); | |
1188 | bfd_put_8 (input_bfd, phys_page, | |
1189 | (bfd_byte*) contents + rel->r_offset + 2); | |
1190 | r = bfd_reloc_ok; | |
1191 | r_type = R_M68HC11_NONE; | |
1192 | break; | |
1193 | ||
1194 | case R_M68HC11_NONE: | |
1195 | r = bfd_reloc_ok; | |
1196 | break; | |
1197 | ||
1198 | case R_M68HC11_LO16: | |
1199 | /* Reloc generated by %addr(expr) gas to obtain the | |
1200 | address as mapped in the memory bank window. */ | |
1201 | relocation = phys_addr; | |
1202 | break; | |
1203 | ||
1204 | case R_M68HC11_PAGE: | |
1205 | /* Reloc generated by %page(expr) gas to obtain the | |
1206 | page number associated with the address. */ | |
1207 | relocation = phys_page; | |
1208 | break; | |
1209 | ||
1210 | case R_M68HC11_16: | |
1211 | /* Get virtual address of instruction having the relocation. */ | |
1212 | if (is_far) | |
1213 | { | |
1214 | const char* msg; | |
1215 | char* buf; | |
1216 | msg = _("Reference to the far symbol `%s' using a wrong " | |
1217 | "relocation may result in incorrect execution"); | |
1218 | buf = alloca (strlen (msg) + strlen (name) + 10); | |
1219 | sprintf (buf, msg, name); | |
1220 | ||
1221 | (* info->callbacks->warning) | |
1222 | (info, buf, name, input_bfd, NULL, rel->r_offset); | |
1223 | } | |
1224 | ||
1225 | /* Get virtual address of instruction having the relocation. */ | |
1226 | insn_addr = input_section->output_section->vma | |
1227 | + input_section->output_offset | |
1228 | + rel->r_offset; | |
1229 | ||
1230 | insn_page = m68hc11_phys_page (pinfo, insn_addr); | |
1231 | ||
1232 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend) | |
1233 | && m68hc11_addr_is_banked (pinfo, insn_addr) | |
1234 | && phys_page != insn_page) | |
1235 | { | |
1236 | const char* msg; | |
1237 | char* buf; | |
1238 | ||
1239 | msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank " | |
1240 | "as current banked address [%lx:%04lx] (%lx)"); | |
1241 | ||
1242 | buf = alloca (strlen (msg) + 128); | |
1243 | sprintf (buf, msg, phys_page, phys_addr, | |
1244 | (long) (relocation + rel->r_addend), | |
1245 | insn_page, m68hc11_phys_addr (pinfo, insn_addr), | |
1246 | (long) (insn_addr)); | |
1247 | if (!((*info->callbacks->warning) | |
1248 | (info, buf, name, input_bfd, input_section, | |
1249 | rel->r_offset))) | |
1250 | return FALSE; | |
1251 | break; | |
1252 | } | |
1253 | if (phys_page != 0 && insn_page == 0) | |
1254 | { | |
1255 | const char* msg; | |
1256 | char* buf; | |
1257 | ||
1258 | msg = _("reference to a banked address [%lx:%04lx] in the " | |
1259 | "normal address space at %04lx"); | |
1260 | ||
1261 | buf = alloca (strlen (msg) + 128); | |
1262 | sprintf (buf, msg, phys_page, phys_addr, insn_addr); | |
1263 | if (!((*info->callbacks->warning) | |
1264 | (info, buf, name, input_bfd, input_section, | |
1265 | insn_addr))) | |
1266 | return FALSE; | |
1267 | ||
1268 | relocation = phys_addr; | |
1269 | break; | |
1270 | } | |
1271 | ||
1272 | /* If this is a banked address use the phys_addr so that | |
1273 | we stay in the banked window. */ | |
1274 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)) | |
1275 | relocation = phys_addr; | |
1276 | break; | |
1277 | } | |
1278 | if (r_type != R_M68HC11_NONE) | |
1279 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1280 | contents, rel->r_offset, | |
1281 | relocation, rel->r_addend); | |
1282 | ||
1283 | if (r != bfd_reloc_ok) | |
1284 | { | |
1285 | const char * msg = (const char *) 0; | |
1286 | ||
1287 | switch (r) | |
1288 | { | |
1289 | case bfd_reloc_overflow: | |
1290 | if (!((*info->callbacks->reloc_overflow) | |
1291 | (info, name, howto->name, (bfd_vma) 0, | |
1292 | input_bfd, input_section, rel->r_offset))) | |
1293 | return FALSE; | |
1294 | break; | |
1295 | ||
1296 | case bfd_reloc_undefined: | |
1297 | if (!((*info->callbacks->undefined_symbol) | |
1298 | (info, name, input_bfd, input_section, | |
1299 | rel->r_offset, TRUE))) | |
1300 | return FALSE; | |
1301 | break; | |
1302 | ||
1303 | case bfd_reloc_outofrange: | |
1304 | msg = _ ("internal error: out of range error"); | |
1305 | goto common_error; | |
1306 | ||
1307 | case bfd_reloc_notsupported: | |
1308 | msg = _ ("internal error: unsupported relocation error"); | |
1309 | goto common_error; | |
1310 | ||
1311 | case bfd_reloc_dangerous: | |
1312 | msg = _ ("internal error: dangerous error"); | |
1313 | goto common_error; | |
1314 | ||
1315 | default: | |
1316 | msg = _ ("internal error: unknown error"); | |
1317 | /* fall through */ | |
1318 | ||
1319 | common_error: | |
1320 | if (!((*info->callbacks->warning) | |
1321 | (info, msg, name, input_bfd, input_section, | |
1322 | rel->r_offset))) | |
1323 | return FALSE; | |
1324 | break; | |
1325 | } | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | return TRUE; | |
1330 | } | |
1331 | ||
1332 | ||
1333 | \f | |
1334 | /* Set and control ELF flags in ELF header. */ | |
1335 | ||
1336 | bfd_boolean | |
1337 | _bfd_m68hc11_elf_set_private_flags (abfd, flags) | |
1338 | bfd *abfd; | |
1339 | flagword flags; | |
1340 | { | |
1341 | BFD_ASSERT (!elf_flags_init (abfd) | |
1342 | || elf_elfheader (abfd)->e_flags == flags); | |
1343 | ||
1344 | elf_elfheader (abfd)->e_flags = flags; | |
1345 | elf_flags_init (abfd) = TRUE; | |
1346 | return TRUE; | |
1347 | } | |
1348 | ||
1349 | /* Merge backend specific data from an object file to the output | |
1350 | object file when linking. */ | |
1351 | ||
1352 | bfd_boolean | |
1353 | _bfd_m68hc11_elf_merge_private_bfd_data (ibfd, obfd) | |
1354 | bfd *ibfd; | |
1355 | bfd *obfd; | |
1356 | { | |
1357 | flagword old_flags; | |
1358 | flagword new_flags; | |
1359 | bfd_boolean ok = TRUE; | |
1360 | ||
1361 | /* Check if we have the same endianess */ | |
1362 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) | |
1363 | return FALSE; | |
1364 | ||
1365 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1366 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1367 | return TRUE; | |
1368 | ||
1369 | new_flags = elf_elfheader (ibfd)->e_flags; | |
1370 | elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI; | |
1371 | old_flags = elf_elfheader (obfd)->e_flags; | |
1372 | ||
1373 | if (! elf_flags_init (obfd)) | |
1374 | { | |
1375 | elf_flags_init (obfd) = TRUE; | |
1376 | elf_elfheader (obfd)->e_flags = new_flags; | |
1377 | elf_elfheader (obfd)->e_ident[EI_CLASS] | |
1378 | = elf_elfheader (ibfd)->e_ident[EI_CLASS]; | |
1379 | ||
1380 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
1381 | && bfd_get_arch_info (obfd)->the_default) | |
1382 | { | |
1383 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
1384 | bfd_get_mach (ibfd))) | |
1385 | return FALSE; | |
1386 | } | |
1387 | ||
1388 | return TRUE; | |
1389 | } | |
1390 | ||
1391 | /* Check ABI compatibility. */ | |
1392 | if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) | |
1393 | { | |
1394 | (*_bfd_error_handler) | |
1395 | (_("%s: linking files compiled for 16-bit integers (-mshort) " | |
1396 | "and others for 32-bit integers"), | |
1397 | bfd_archive_filename (ibfd)); | |
1398 | ok = FALSE; | |
1399 | } | |
1400 | if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) | |
1401 | { | |
1402 | (*_bfd_error_handler) | |
1403 | (_("%s: linking files compiled for 32-bit double (-fshort-double) " | |
1404 | "and others for 64-bit double"), | |
1405 | bfd_archive_filename (ibfd)); | |
1406 | ok = FALSE; | |
1407 | } | |
1408 | new_flags &= ~EF_M68HC11_ABI; | |
1409 | old_flags &= ~EF_M68HC11_ABI; | |
1410 | ||
1411 | /* Warn about any other mismatches */ | |
1412 | if (new_flags != old_flags) | |
1413 | { | |
1414 | (*_bfd_error_handler) | |
1415 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), | |
1416 | bfd_archive_filename (ibfd), (unsigned long) new_flags, | |
1417 | (unsigned long) old_flags); | |
1418 | ok = FALSE; | |
1419 | } | |
1420 | ||
1421 | if (! ok) | |
1422 | { | |
1423 | bfd_set_error (bfd_error_bad_value); | |
1424 | return FALSE; | |
1425 | } | |
1426 | ||
1427 | return TRUE; | |
1428 | } | |
1429 | ||
1430 | bfd_boolean | |
1431 | _bfd_m68hc11_elf_print_private_bfd_data (abfd, ptr) | |
1432 | bfd *abfd; | |
1433 | PTR ptr; | |
1434 | { | |
1435 | FILE *file = (FILE *) ptr; | |
1436 | ||
1437 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
1438 | ||
1439 | /* Print normal ELF private data. */ | |
1440 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
1441 | ||
1442 | /* xgettext:c-format */ | |
1443 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
1444 | ||
1445 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) | |
1446 | fprintf (file, _("[abi=32-bit int, ")); | |
1447 | else | |
1448 | fprintf (file, _("[abi=16-bit int, ")); | |
1449 | ||
1450 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) | |
1451 | fprintf (file, _("64-bit double, ")); | |
1452 | else | |
1453 | fprintf (file, _("32-bit double, ")); | |
1454 | ||
1455 | if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0) | |
1456 | fprintf (file, _("cpu=HC11]")); | |
1457 | else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH) | |
1458 | fprintf (file, _("cpu=HCS12]")); | |
1459 | else | |
1460 | fprintf (file, _("cpu=HC12]")); | |
1461 | ||
1462 | if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS) | |
1463 | fprintf (file, _(" [memory=bank-model]")); | |
1464 | else | |
1465 | fprintf (file, _(" [memory=flat]")); | |
1466 | ||
1467 | fputc ('\n', file); | |
1468 | ||
1469 | return TRUE; | |
1470 | } | |
1471 | ||
1472 | static void scan_sections_for_abi (abfd, asect, arg) | |
1473 | bfd* abfd ATTRIBUTE_UNUSED; | |
1474 | asection* asect; | |
1475 | PTR arg; | |
1476 | { | |
1477 | struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg; | |
1478 | ||
1479 | if (asect->vma >= p->pinfo->bank_virtual) | |
1480 | p->use_memory_banks = TRUE; | |
1481 | } | |
1482 | ||
1483 | /* Tweak the OSABI field of the elf header. */ | |
1484 | ||
1485 | void | |
1486 | elf32_m68hc11_post_process_headers (abfd, link_info) | |
1487 | bfd *abfd; | |
1488 | struct bfd_link_info *link_info; | |
1489 | { | |
1490 | struct m68hc11_scan_param param; | |
1491 | ||
1492 | if (link_info == 0) | |
1493 | return; | |
1494 | ||
1495 | m68hc11_elf_get_bank_parameters (link_info); | |
1496 | ||
1497 | param.use_memory_banks = FALSE; | |
1498 | param.pinfo = &m68hc11_elf_hash_table (link_info)->pinfo; | |
1499 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); | |
1500 | if (param.use_memory_banks) | |
1501 | { | |
1502 | Elf_Internal_Ehdr * i_ehdrp; | |
1503 | ||
1504 | i_ehdrp = elf_elfheader (abfd); | |
1505 | i_ehdrp->e_flags |= E_M68HC12_BANKS; | |
1506 | } | |
1507 | } | |
1508 |