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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 | ||
47247ced | 78 | ret = (struct m68hc11_elf_link_hash_table *) bfd_malloc (amt); |
3a65329d SC |
79 | if (ret == (struct m68hc11_elf_link_hash_table *) NULL) |
80 | return NULL; | |
81 | ||
47247ced | 82 | memset (ret, 0, amt); |
3a65329d SC |
83 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, |
84 | _bfd_elf_link_hash_newfunc)) | |
85 | { | |
47247ced | 86 | free (ret); |
3a65329d SC |
87 | return NULL; |
88 | } | |
89 | ||
90 | /* Init the stub hash table too. */ | |
91 | amt = sizeof (struct bfd_hash_table); | |
92 | ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt); | |
93 | if (ret->stub_hash_table == NULL) | |
94 | { | |
47247ced | 95 | free (ret); |
3a65329d SC |
96 | return NULL; |
97 | } | |
98 | if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc)) | |
99 | return NULL; | |
100 | ||
101 | ret->stub_bfd = NULL; | |
102 | ret->stub_section = 0; | |
103 | ret->add_stub_section = NULL; | |
104 | ret->sym_sec.abfd = NULL; | |
105 | ||
106 | return ret; | |
107 | } | |
108 | ||
109 | /* Free the derived linker hash table. */ | |
110 | ||
111 | void | |
112 | m68hc11_elf_bfd_link_hash_table_free (hash) | |
113 | struct bfd_link_hash_table *hash; | |
114 | { | |
115 | struct m68hc11_elf_link_hash_table *ret | |
116 | = (struct m68hc11_elf_link_hash_table *) hash; | |
117 | ||
118 | bfd_hash_table_free (ret->stub_hash_table); | |
119 | free (ret->stub_hash_table); | |
120 | _bfd_generic_link_hash_table_free (hash); | |
121 | } | |
122 | ||
123 | /* Assorted hash table functions. */ | |
124 | ||
125 | /* Initialize an entry in the stub hash table. */ | |
126 | ||
127 | static struct bfd_hash_entry * | |
128 | stub_hash_newfunc (entry, table, string) | |
129 | struct bfd_hash_entry *entry; | |
130 | struct bfd_hash_table *table; | |
131 | const char *string; | |
132 | { | |
133 | /* Allocate the structure if it has not already been allocated by a | |
134 | subclass. */ | |
135 | if (entry == NULL) | |
136 | { | |
137 | entry = bfd_hash_allocate (table, | |
138 | sizeof (struct elf32_m68hc11_stub_hash_entry)); | |
139 | if (entry == NULL) | |
140 | return entry; | |
141 | } | |
142 | ||
143 | /* Call the allocation method of the superclass. */ | |
144 | entry = bfd_hash_newfunc (entry, table, string); | |
145 | if (entry != NULL) | |
146 | { | |
147 | struct elf32_m68hc11_stub_hash_entry *eh; | |
148 | ||
149 | /* Initialize the local fields. */ | |
150 | eh = (struct elf32_m68hc11_stub_hash_entry *) entry; | |
151 | eh->stub_sec = NULL; | |
152 | eh->stub_offset = 0; | |
153 | eh->target_value = 0; | |
154 | eh->target_section = NULL; | |
155 | } | |
156 | ||
157 | return entry; | |
158 | } | |
159 | ||
160 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
161 | stub entry are initialised. */ | |
162 | ||
163 | static struct elf32_m68hc11_stub_hash_entry * | |
164 | m68hc12_add_stub (stub_name, section, htab) | |
165 | const char *stub_name; | |
166 | asection *section; | |
167 | struct m68hc11_elf_link_hash_table *htab; | |
168 | { | |
169 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
170 | ||
171 | /* Enter this entry into the linker stub hash table. */ | |
172 | stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name, | |
173 | TRUE, FALSE); | |
174 | if (stub_entry == NULL) | |
175 | { | |
176 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), | |
177 | bfd_archive_filename (section->owner), | |
178 | stub_name); | |
179 | return NULL; | |
180 | } | |
181 | ||
182 | if (htab->stub_section == 0) | |
183 | { | |
184 | htab->stub_section = (*htab->add_stub_section) (".tramp", | |
185 | htab->tramp_section); | |
186 | } | |
187 | ||
188 | stub_entry->stub_sec = htab->stub_section; | |
189 | stub_entry->stub_offset = 0; | |
190 | return stub_entry; | |
191 | } | |
192 | ||
193 | /* Hook called by the linker routine which adds symbols from an object | |
194 | file. We use it for identify far symbols and force a loading of | |
195 | the trampoline handler. */ | |
196 | ||
197 | bfd_boolean | |
198 | elf32_m68hc11_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) | |
199 | bfd *abfd; | |
200 | struct bfd_link_info *info; | |
201 | const Elf_Internal_Sym *sym; | |
202 | const char **namep ATTRIBUTE_UNUSED; | |
203 | flagword *flagsp ATTRIBUTE_UNUSED; | |
204 | asection **secp ATTRIBUTE_UNUSED; | |
205 | bfd_vma *valp ATTRIBUTE_UNUSED; | |
206 | { | |
207 | if (sym->st_other & STO_M68HC12_FAR) | |
208 | { | |
209 | struct elf_link_hash_entry *h; | |
210 | ||
211 | h = (struct elf_link_hash_entry *) | |
212 | bfd_link_hash_lookup (info->hash, "__far_trampoline", | |
213 | FALSE, FALSE, FALSE); | |
214 | if (h == NULL) | |
215 | { | |
216 | struct bfd_link_hash_entry* entry = NULL; | |
217 | ||
218 | _bfd_generic_link_add_one_symbol (info, abfd, | |
219 | "__far_trampoline", | |
220 | BSF_GLOBAL, | |
221 | bfd_und_section_ptr, | |
222 | (bfd_vma) 0, (const char*) NULL, | |
223 | FALSE, FALSE, &entry); | |
224 | } | |
225 | ||
226 | } | |
227 | return TRUE; | |
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 (output_bfd, info) | |
238 | bfd *output_bfd; | |
239 | struct bfd_link_info *info; | |
240 | { | |
241 | bfd *input_bfd; | |
242 | unsigned int bfd_count; | |
243 | int top_id, top_index; | |
244 | asection *section; | |
245 | asection **input_list, **list; | |
246 | bfd_size_type amt; | |
247 | asection *text_section; | |
248 | struct m68hc11_elf_link_hash_table *htab; | |
249 | ||
250 | htab = m68hc11_elf_hash_table (info); | |
251 | ||
252 | if (htab->root.root.creator->flavour != 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_get_section_name (input_bfd, 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 | _bfd_strip_section_from_output 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 (output_bfd, stub_bfd, info, add_stub_section) | |
330 | bfd *output_bfd; | |
331 | bfd *stub_bfd; | |
332 | struct bfd_link_info *info; | |
333 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); | |
334 | { | |
335 | bfd *input_bfd; | |
336 | asection *section; | |
337 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
338 | unsigned int bfd_indx, bfd_count; | |
339 | bfd_size_type amt; | |
340 | asection *stub_sec; | |
341 | ||
342 | struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info); | |
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 | { | |
353 | bfd_count += 1; | |
354 | } | |
355 | ||
356 | /* We want to read in symbol extension records only once. To do this | |
357 | we need to read in the local symbols in parallel and save them for | |
358 | later use; so hold pointers to the local symbols in an array. */ | |
359 | amt = sizeof (Elf_Internal_Sym *) * bfd_count; | |
360 | all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); | |
361 | if (all_local_syms == NULL) | |
362 | return FALSE; | |
363 | ||
364 | /* Walk over all the input BFDs, swapping in local symbols. */ | |
365 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
366 | input_bfd != NULL; | |
367 | input_bfd = input_bfd->link_next, bfd_indx++) | |
368 | { | |
369 | Elf_Internal_Shdr *symtab_hdr; | |
370 | Elf_Internal_Shdr *shndx_hdr; | |
371 | Elf_Internal_Sym *isym; | |
372 | Elf32_External_Sym *extsyms, *esym, *end_sy; | |
373 | Elf_External_Sym_Shndx *shndx_buf, *shndx; | |
374 | bfd_size_type sec_size; | |
375 | ||
376 | /* We'll need the symbol table in a second. */ | |
377 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
378 | if (symtab_hdr->sh_info == 0) | |
379 | continue; | |
380 | ||
381 | /* We need an array of the local symbols attached to the input bfd. | |
382 | Unfortunately, we're going to have to read & swap them in. */ | |
383 | sec_size = symtab_hdr->sh_info; | |
384 | sec_size *= sizeof (Elf_Internal_Sym); | |
385 | local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size); | |
386 | if (local_syms == NULL) | |
387 | goto error_ret_free_local; | |
388 | ||
389 | all_local_syms[bfd_indx] = local_syms; | |
390 | sec_size = symtab_hdr->sh_info; | |
391 | sec_size *= sizeof (Elf32_External_Sym); | |
392 | ||
393 | /* Get the cached copy. */ | |
394 | if (symtab_hdr->contents != NULL) | |
395 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
396 | else | |
397 | { | |
398 | /* Go get them off disk. */ | |
399 | bfd_size_type amt = symtab_hdr->sh_size; | |
400 | extsyms = (Elf32_External_Sym *) bfd_malloc (amt); | |
401 | if (extsyms == NULL) | |
402 | goto error_ret_free_local; | |
403 | ||
404 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
405 | || bfd_bread ((PTR) extsyms, amt, input_bfd) != amt) | |
406 | { | |
407 | error_ret_free_ext_syms: | |
408 | free (extsyms); | |
409 | goto error_ret_free_local; | |
410 | } | |
411 | } | |
412 | shndx_buf = NULL; | |
413 | shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr; | |
414 | if (shndx_hdr->sh_size != 0) | |
415 | { | |
416 | bfd_size_type amt; | |
417 | ||
418 | amt = symtab_hdr->sh_info * sizeof (Elf_External_Sym_Shndx); | |
419 | shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
420 | if (shndx_buf == NULL) | |
421 | goto error_ret_free_ext_syms; | |
422 | if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0 | |
423 | || bfd_bread ((PTR) shndx_buf, amt, input_bfd) != amt) | |
424 | { | |
425 | free (shndx_buf); | |
426 | goto error_ret_free_ext_syms; | |
427 | } | |
428 | shndx_hdr->contents = (PTR) shndx_buf; | |
429 | } | |
430 | ||
431 | /* Swap the local symbols in. */ | |
432 | for (esym = extsyms, end_sy = esym + symtab_hdr->sh_info, | |
433 | isym = local_syms, shndx = shndx_buf; | |
434 | esym < end_sy; | |
435 | esym++, isym++, shndx = (shndx ? shndx + 1 : NULL)) | |
436 | bfd_elf32_swap_symbol_in (input_bfd, esym, shndx, isym); | |
437 | ||
438 | /* Now we can free the external symbols. */ | |
439 | free (shndx_buf); | |
440 | } | |
441 | ||
442 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
443 | input_bfd != NULL; | |
444 | input_bfd = input_bfd->link_next, bfd_indx++) | |
445 | { | |
446 | Elf_Internal_Shdr *symtab_hdr; | |
447 | Elf_Internal_Sym *local_syms; | |
448 | struct elf_link_hash_entry ** sym_hashes; | |
449 | ||
450 | sym_hashes = elf_sym_hashes (input_bfd); | |
451 | ||
452 | /* We'll need the symbol table in a second. */ | |
453 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
454 | if (symtab_hdr->sh_info == 0) | |
455 | continue; | |
456 | ||
457 | local_syms = all_local_syms[bfd_indx]; | |
458 | ||
459 | /* Walk over each section attached to the input bfd. */ | |
460 | for (section = input_bfd->sections; | |
461 | section != NULL; | |
462 | section = section->next) | |
463 | { | |
464 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
465 | ||
466 | /* If there aren't any relocs, then there's nothing more | |
467 | to do. */ | |
468 | if ((section->flags & SEC_RELOC) == 0 | |
469 | || section->reloc_count == 0) | |
470 | continue; | |
471 | ||
472 | /* If this section is a link-once section that will be | |
473 | discarded, then don't create any stubs. */ | |
474 | if (section->output_section == NULL | |
475 | || section->output_section->owner != output_bfd) | |
476 | continue; | |
477 | ||
478 | /* Get the relocs. */ | |
479 | internal_relocs | |
45d6a902 AM |
480 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
481 | (Elf_Internal_Rela *) NULL, | |
482 | info->keep_memory); | |
3a65329d SC |
483 | if (internal_relocs == NULL) |
484 | goto error_ret_free_local; | |
485 | ||
486 | /* Now examine each relocation. */ | |
487 | irela = internal_relocs; | |
488 | irelaend = irela + section->reloc_count; | |
489 | for (; irela < irelaend; irela++) | |
490 | { | |
491 | unsigned int r_type, r_indx; | |
492 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
493 | asection *sym_sec; | |
494 | bfd_vma sym_value; | |
495 | struct elf_link_hash_entry *hash; | |
496 | const char *stub_name; | |
497 | Elf_Internal_Sym *sym; | |
498 | ||
499 | r_type = ELF32_R_TYPE (irela->r_info); | |
500 | ||
501 | /* Only look at 16-bit relocs. */ | |
502 | if (r_type != (unsigned int) R_M68HC11_16) | |
503 | continue; | |
504 | ||
505 | /* Now determine the call target, its name, value, | |
506 | section. */ | |
507 | r_indx = ELF32_R_SYM (irela->r_info); | |
508 | if (r_indx < symtab_hdr->sh_info) | |
509 | { | |
510 | /* It's a local symbol. */ | |
511 | Elf_Internal_Shdr *hdr; | |
512 | bfd_boolean is_far; | |
513 | ||
514 | sym = local_syms + r_indx; | |
515 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
516 | sym_sec = hdr->bfd_section; | |
517 | is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); | |
518 | if (!is_far) | |
519 | continue; | |
520 | stub_name = (bfd_elf_string_from_elf_section | |
521 | (input_bfd, symtab_hdr->sh_link, | |
522 | sym->st_name)); | |
523 | sym_value = sym->st_value; | |
524 | hash = NULL; | |
525 | } | |
526 | else | |
527 | { | |
528 | /* It's an external symbol. */ | |
529 | int e_indx; | |
530 | ||
531 | e_indx = r_indx - symtab_hdr->sh_info; | |
532 | hash = (struct elf_link_hash_entry *) | |
533 | (sym_hashes[e_indx]); | |
534 | ||
535 | while (hash->root.type == bfd_link_hash_indirect | |
536 | || hash->root.type == bfd_link_hash_warning) | |
537 | hash = ((struct elf_link_hash_entry *) | |
538 | hash->root.u.i.link); | |
539 | ||
540 | if (hash->root.type == bfd_link_hash_defined | |
541 | || hash->root.type == bfd_link_hash_defweak) | |
542 | { | |
543 | if (!(hash->other & STO_M68HC12_FAR)) | |
544 | continue; | |
545 | } | |
546 | else if (hash->root.type == bfd_link_hash_undefweak) | |
547 | { | |
548 | continue; | |
549 | } | |
550 | else if (hash->root.type == bfd_link_hash_undefined) | |
551 | { | |
552 | continue; | |
553 | } | |
554 | else | |
555 | { | |
556 | bfd_set_error (bfd_error_bad_value); | |
557 | goto error_ret_free_internal; | |
558 | } | |
559 | sym_sec = hash->root.u.def.section; | |
560 | sym_value = hash->root.u.def.value; | |
561 | stub_name = hash->root.root.string; | |
562 | } | |
563 | ||
564 | if (!stub_name) | |
565 | goto error_ret_free_internal; | |
566 | ||
567 | stub_entry = m68hc12_stub_hash_lookup | |
568 | (htab->stub_hash_table, | |
569 | stub_name, | |
570 | FALSE, FALSE); | |
571 | if (stub_entry == NULL) | |
572 | { | |
573 | if (add_stub_section == 0) | |
574 | continue; | |
575 | ||
576 | stub_entry = m68hc12_add_stub (stub_name, section, htab); | |
577 | if (stub_entry == NULL) | |
578 | { | |
579 | error_ret_free_internal: | |
580 | if (elf_section_data (section)->relocs == NULL) | |
581 | free (internal_relocs); | |
582 | goto error_ret_free_local; | |
583 | } | |
584 | } | |
585 | ||
586 | stub_entry->target_value = sym_value; | |
587 | stub_entry->target_section = sym_sec; | |
588 | } | |
589 | ||
590 | /* We're done with the internal relocs, free them. */ | |
591 | if (elf_section_data (section)->relocs == NULL) | |
592 | free (internal_relocs); | |
593 | } | |
594 | } | |
595 | ||
596 | if (add_stub_section) | |
597 | { | |
598 | /* OK, we've added some stubs. Find out the new size of the | |
599 | stub sections. */ | |
600 | for (stub_sec = htab->stub_bfd->sections; | |
601 | stub_sec != NULL; | |
602 | stub_sec = stub_sec->next) | |
603 | { | |
604 | stub_sec->_raw_size = 0; | |
605 | stub_sec->_cooked_size = 0; | |
606 | } | |
607 | ||
608 | bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab); | |
609 | } | |
610 | free (htab->all_local_syms); | |
611 | return TRUE; | |
612 | ||
613 | error_ret_free_local: | |
614 | free (htab->all_local_syms); | |
615 | return FALSE; | |
616 | } | |
617 | ||
618 | /* Export the trampoline addresses in the symbol table. */ | |
619 | static bfd_boolean | |
620 | m68hc11_elf_export_one_stub (gen_entry, in_arg) | |
621 | struct bfd_hash_entry *gen_entry; | |
622 | PTR in_arg; | |
623 | { | |
624 | struct bfd_link_info *info; | |
625 | struct m68hc11_elf_link_hash_table *htab; | |
626 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
627 | char* name; | |
628 | bfd_boolean result; | |
629 | ||
630 | info = (struct bfd_link_info *) in_arg; | |
631 | htab = m68hc11_elf_hash_table (info); | |
632 | ||
633 | /* Massage our args to the form they really have. */ | |
634 | stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; | |
635 | ||
636 | /* Generate the trampoline according to HC11 or HC12. */ | |
637 | result = (* htab->build_one_stub) (gen_entry, in_arg); | |
638 | ||
639 | /* Make a printable name that does not conflict with the real function. */ | |
640 | name = alloca (strlen (stub_entry->root.string) + 16); | |
641 | sprintf (name, "tramp.%s", stub_entry->root.string); | |
642 | ||
643 | /* Export the symbol for debugging/disassembling. */ | |
644 | m68hc11_elf_set_symbol (htab->stub_bfd, info, name, | |
645 | stub_entry->stub_offset, | |
646 | stub_entry->stub_sec); | |
647 | return result; | |
648 | } | |
649 | ||
650 | /* Export a symbol or set its value and section. */ | |
651 | static void | |
652 | m68hc11_elf_set_symbol (abfd, info, name, value, sec) | |
653 | bfd* abfd; | |
654 | struct bfd_link_info *info; | |
655 | const char* name; | |
656 | bfd_vma value; | |
657 | asection* sec; | |
658 | { | |
659 | struct elf_link_hash_entry *h; | |
660 | ||
661 | h = (struct elf_link_hash_entry *) | |
662 | bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE); | |
663 | if (h == NULL) | |
664 | { | |
665 | _bfd_generic_link_add_one_symbol (info, abfd, | |
666 | name, | |
667 | BSF_GLOBAL, | |
668 | sec, | |
669 | value, | |
670 | (const char*) NULL, | |
671 | TRUE, FALSE, NULL); | |
672 | } | |
673 | else | |
674 | { | |
675 | h->root.type = bfd_link_hash_defined; | |
676 | h->root.u.def.value = value; | |
677 | h->root.u.def.section = sec; | |
678 | } | |
679 | } | |
680 | ||
681 | ||
682 | /* Build all the stubs associated with the current output file. The | |
683 | stubs are kept in a hash table attached to the main linker hash | |
684 | table. This function is called via m68hc12elf_finish in the | |
685 | linker. */ | |
686 | ||
687 | bfd_boolean | |
688 | elf32_m68hc11_build_stubs (abfd, info) | |
689 | bfd* abfd; | |
690 | struct bfd_link_info *info; | |
691 | { | |
692 | asection *stub_sec; | |
693 | struct bfd_hash_table *table; | |
694 | struct m68hc11_elf_link_hash_table *htab; | |
695 | struct m68hc11_scan_param param; | |
696 | ||
697 | m68hc11_elf_get_bank_parameters (info); | |
698 | htab = m68hc11_elf_hash_table (info); | |
699 | ||
700 | for (stub_sec = htab->stub_bfd->sections; | |
701 | stub_sec != NULL; | |
702 | stub_sec = stub_sec->next) | |
703 | { | |
704 | bfd_size_type size; | |
705 | ||
706 | /* Allocate memory to hold the linker stubs. */ | |
707 | size = stub_sec->_raw_size; | |
708 | stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); | |
709 | if (stub_sec->contents == NULL && size != 0) | |
710 | return FALSE; | |
711 | stub_sec->_raw_size = 0; | |
712 | } | |
713 | ||
714 | /* Build the stubs as directed by the stub hash table. */ | |
715 | table = htab->stub_hash_table; | |
716 | bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info); | |
717 | ||
718 | /* Scan the output sections to see if we use the memory banks. | |
719 | If so, export the symbols that define how the memory banks | |
720 | are mapped. This is used by gdb and the simulator to obtain | |
721 | the information. It can be used by programs to burn the eprom | |
722 | at the good addresses. */ | |
723 | param.use_memory_banks = FALSE; | |
724 | param.pinfo = &htab->pinfo; | |
725 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); | |
726 | if (param.use_memory_banks) | |
727 | { | |
728 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME, | |
729 | htab->pinfo.bank_physical, | |
730 | bfd_abs_section_ptr); | |
731 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
732 | htab->pinfo.bank_virtual, | |
733 | bfd_abs_section_ptr); | |
734 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME, | |
735 | htab->pinfo.bank_size, | |
736 | bfd_abs_section_ptr); | |
737 | } | |
738 | ||
739 | return TRUE; | |
740 | } | |
741 | ||
742 | void | |
743 | m68hc11_elf_get_bank_parameters (info) | |
744 | struct bfd_link_info *info; | |
745 | { | |
746 | unsigned i; | |
747 | struct m68hc11_page_info *pinfo; | |
748 | struct bfd_link_hash_entry *h; | |
749 | ||
750 | pinfo = &m68hc11_elf_hash_table (info)->pinfo; | |
751 | if (pinfo->bank_param_initialized) | |
752 | return; | |
753 | ||
754 | pinfo->bank_virtual = M68HC12_BANK_VIRT; | |
755 | pinfo->bank_mask = M68HC12_BANK_MASK; | |
756 | pinfo->bank_physical = M68HC12_BANK_BASE; | |
757 | pinfo->bank_shift = M68HC12_BANK_SHIFT; | |
758 | pinfo->bank_size = 1 << M68HC12_BANK_SHIFT; | |
759 | ||
760 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME, | |
761 | FALSE, FALSE, TRUE); | |
762 | if (h != (struct bfd_link_hash_entry*) NULL | |
763 | && h->type == bfd_link_hash_defined) | |
764 | pinfo->bank_physical = (h->u.def.value | |
765 | + h->u.def.section->output_section->vma | |
766 | + h->u.def.section->output_offset); | |
767 | ||
768 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
769 | FALSE, FALSE, TRUE); | |
770 | if (h != (struct bfd_link_hash_entry*) NULL | |
771 | && h->type == bfd_link_hash_defined) | |
772 | pinfo->bank_virtual = (h->u.def.value | |
773 | + h->u.def.section->output_section->vma | |
774 | + h->u.def.section->output_offset); | |
775 | ||
776 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME, | |
777 | FALSE, FALSE, TRUE); | |
778 | if (h != (struct bfd_link_hash_entry*) NULL | |
779 | && h->type == bfd_link_hash_defined) | |
780 | pinfo->bank_size = (h->u.def.value | |
781 | + h->u.def.section->output_section->vma | |
782 | + h->u.def.section->output_offset); | |
783 | ||
784 | pinfo->bank_shift = 0; | |
785 | for (i = pinfo->bank_size; i != 0; i >>= 1) | |
786 | pinfo->bank_shift++; | |
787 | pinfo->bank_shift--; | |
788 | pinfo->bank_mask = (1 << pinfo->bank_shift) - 1; | |
789 | pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size; | |
790 | pinfo->bank_param_initialized = 1; | |
791 | ||
792 | h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE, | |
793 | FALSE, TRUE); | |
794 | if (h != (struct bfd_link_hash_entry*) NULL | |
795 | && h->type == bfd_link_hash_defined) | |
796 | pinfo->trampoline_addr = (h->u.def.value | |
797 | + h->u.def.section->output_section->vma | |
798 | + h->u.def.section->output_offset); | |
799 | } | |
800 | ||
801 | /* Return 1 if the address is in banked memory. | |
802 | This can be applied to a virtual address and to a physical address. */ | |
803 | int | |
804 | m68hc11_addr_is_banked (pinfo, addr) | |
805 | struct m68hc11_page_info *pinfo; | |
806 | bfd_vma addr; | |
807 | { | |
808 | if (addr >= pinfo->bank_virtual) | |
809 | return 1; | |
810 | ||
811 | if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end) | |
812 | return 1; | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
817 | /* Return the physical address seen by the processor, taking | |
818 | into account banked memory. */ | |
819 | bfd_vma | |
820 | m68hc11_phys_addr (pinfo, addr) | |
821 | struct m68hc11_page_info *pinfo; | |
822 | bfd_vma addr; | |
823 | { | |
824 | if (addr < pinfo->bank_virtual) | |
825 | return addr; | |
826 | ||
827 | /* Map the address to the memory bank. */ | |
828 | addr -= pinfo->bank_virtual; | |
829 | addr &= pinfo->bank_mask; | |
830 | addr += pinfo->bank_physical; | |
831 | return addr; | |
832 | } | |
833 | ||
834 | /* Return the page number corresponding to an address in banked memory. */ | |
835 | bfd_vma | |
836 | m68hc11_phys_page (pinfo, addr) | |
837 | struct m68hc11_page_info *pinfo; | |
838 | bfd_vma addr; | |
839 | { | |
840 | if (addr < pinfo->bank_virtual) | |
841 | return 0; | |
842 | ||
843 | /* Map the address to the memory bank. */ | |
844 | addr -= pinfo->bank_virtual; | |
845 | addr >>= pinfo->bank_shift; | |
846 | addr &= 0x0ff; | |
847 | return addr; | |
848 | } | |
849 | ||
850 | /* This function is used for relocs which are only used for relaxing, | |
851 | which the linker should otherwise ignore. */ | |
852 | ||
853 | bfd_reloc_status_type | |
854 | m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section, | |
855 | output_bfd, error_message) | |
856 | bfd *abfd ATTRIBUTE_UNUSED; | |
857 | arelent *reloc_entry; | |
858 | asymbol *symbol ATTRIBUTE_UNUSED; | |
859 | PTR data ATTRIBUTE_UNUSED; | |
860 | asection *input_section; | |
861 | bfd *output_bfd; | |
862 | char **error_message ATTRIBUTE_UNUSED; | |
863 | { | |
864 | if (output_bfd != NULL) | |
865 | reloc_entry->address += input_section->output_offset; | |
866 | return bfd_reloc_ok; | |
867 | } | |
868 | ||
869 | bfd_reloc_status_type | |
870 | m68hc11_elf_special_reloc (abfd, reloc_entry, symbol, data, input_section, | |
871 | output_bfd, error_message) | |
872 | bfd *abfd ATTRIBUTE_UNUSED; | |
873 | arelent *reloc_entry; | |
874 | asymbol *symbol; | |
875 | PTR data ATTRIBUTE_UNUSED; | |
876 | asection *input_section; | |
877 | bfd *output_bfd; | |
878 | char **error_message ATTRIBUTE_UNUSED; | |
879 | { | |
880 | if (output_bfd != (bfd *) NULL | |
881 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
882 | && (! reloc_entry->howto->partial_inplace | |
883 | || reloc_entry->addend == 0)) | |
884 | { | |
885 | reloc_entry->address += input_section->output_offset; | |
886 | return bfd_reloc_ok; | |
887 | } | |
888 | ||
889 | if (output_bfd != NULL) | |
890 | return bfd_reloc_continue; | |
891 | ||
892 | if (reloc_entry->address > input_section->_cooked_size) | |
893 | return bfd_reloc_outofrange; | |
894 | ||
895 | abort(); | |
896 | } | |
897 | ||
898 | asection * | |
899 | elf32_m68hc11_gc_mark_hook (sec, info, rel, h, sym) | |
900 | asection *sec; | |
901 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
902 | Elf_Internal_Rela *rel; | |
903 | struct elf_link_hash_entry *h; | |
904 | Elf_Internal_Sym *sym; | |
905 | { | |
906 | if (h != NULL) | |
907 | { | |
908 | switch (ELF32_R_TYPE (rel->r_info)) | |
909 | { | |
910 | default: | |
911 | switch (h->root.type) | |
912 | { | |
913 | case bfd_link_hash_defined: | |
914 | case bfd_link_hash_defweak: | |
915 | return h->root.u.def.section; | |
916 | ||
917 | case bfd_link_hash_common: | |
918 | return h->root.u.c.p->section; | |
919 | ||
920 | default: | |
921 | break; | |
922 | } | |
923 | } | |
924 | } | |
925 | else | |
926 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
927 | ||
928 | return NULL; | |
929 | } | |
930 | ||
931 | bfd_boolean | |
932 | elf32_m68hc11_gc_sweep_hook (abfd, info, sec, relocs) | |
933 | bfd *abfd ATTRIBUTE_UNUSED; | |
934 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
935 | asection *sec ATTRIBUTE_UNUSED; | |
936 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
937 | { | |
938 | /* We don't use got and plt entries for 68hc11/68hc12. */ | |
939 | return TRUE; | |
940 | } | |
941 | ||
942 | /* Look through the relocs for a section during the first phase. | |
943 | Since we don't do .gots or .plts, we just need to consider the | |
944 | virtual table relocs for gc. */ | |
945 | ||
946 | bfd_boolean | |
947 | elf32_m68hc11_check_relocs (abfd, info, sec, relocs) | |
948 | bfd * abfd; | |
949 | struct bfd_link_info * info; | |
950 | asection * sec; | |
951 | const Elf_Internal_Rela * relocs; | |
952 | { | |
953 | Elf_Internal_Shdr * symtab_hdr; | |
954 | struct elf_link_hash_entry ** sym_hashes; | |
955 | struct elf_link_hash_entry ** sym_hashes_end; | |
956 | const Elf_Internal_Rela * rel; | |
957 | const Elf_Internal_Rela * rel_end; | |
958 | ||
959 | if (info->relocateable) | |
960 | return TRUE; | |
961 | ||
962 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
963 | sym_hashes = elf_sym_hashes (abfd); | |
964 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
965 | if (!elf_bad_symtab (abfd)) | |
966 | sym_hashes_end -= symtab_hdr->sh_info; | |
967 | ||
968 | rel_end = relocs + sec->reloc_count; | |
969 | ||
970 | for (rel = relocs; rel < rel_end; rel++) | |
971 | { | |
972 | struct elf_link_hash_entry * h; | |
973 | unsigned long r_symndx; | |
974 | ||
975 | r_symndx = ELF32_R_SYM (rel->r_info); | |
976 | ||
977 | if (r_symndx < symtab_hdr->sh_info) | |
978 | h = NULL; | |
979 | else | |
980 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
981 | ||
982 | switch (ELF32_R_TYPE (rel->r_info)) | |
983 | { | |
984 | /* This relocation describes the C++ object vtable hierarchy. | |
985 | Reconstruct it for later use during GC. */ | |
986 | case R_M68HC11_GNU_VTINHERIT: | |
987 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
988 | return FALSE; | |
989 | break; | |
990 | ||
991 | /* This relocation describes which C++ vtable entries are actually | |
992 | used. Record for later use during GC. */ | |
993 | case R_M68HC11_GNU_VTENTRY: | |
994 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
995 | return FALSE; | |
996 | break; | |
997 | } | |
998 | } | |
999 | ||
1000 | return TRUE; | |
1001 | } | |
1002 | ||
1003 | static bfd_boolean | |
1004 | m68hc11_get_relocation_value (abfd, info, local_sections, local_syms, | |
1005 | rel, name, | |
1006 | relocation, is_far) | |
1007 | bfd *abfd; | |
1008 | struct bfd_link_info *info; | |
1009 | asection **local_sections; | |
1010 | Elf_Internal_Sym* local_syms; | |
1011 | Elf_Internal_Rela* rel; | |
1012 | const char** name; | |
1013 | bfd_vma* relocation; | |
1014 | bfd_boolean* is_far; | |
1015 | { | |
1016 | Elf_Internal_Shdr *symtab_hdr; | |
1017 | struct elf_link_hash_entry **sym_hashes; | |
1018 | unsigned long r_symndx; | |
1019 | asection *sec; | |
1020 | struct elf_link_hash_entry *h; | |
1021 | Elf_Internal_Sym *sym; | |
1022 | const char* stub_name = 0; | |
1023 | ||
1024 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1025 | sym_hashes = elf_sym_hashes (abfd); | |
1026 | ||
1027 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1028 | ||
1029 | /* This is a final link. */ | |
1030 | h = NULL; | |
1031 | sym = NULL; | |
1032 | sec = NULL; | |
1033 | if (r_symndx < symtab_hdr->sh_info) | |
1034 | { | |
1035 | sym = local_syms + r_symndx; | |
1036 | sec = local_sections[r_symndx]; | |
1037 | *relocation = (sec->output_section->vma | |
1038 | + sec->output_offset | |
1039 | + sym->st_value); | |
1040 | *is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); | |
1041 | if (*is_far) | |
1042 | stub_name = (bfd_elf_string_from_elf_section | |
1043 | (abfd, symtab_hdr->sh_link, | |
1044 | sym->st_name)); | |
1045 | } | |
1046 | else | |
1047 | { | |
1048 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1049 | while (h->root.type == bfd_link_hash_indirect | |
1050 | || h->root.type == bfd_link_hash_warning) | |
1051 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1052 | if (h->root.type == bfd_link_hash_defined | |
1053 | || h->root.type == bfd_link_hash_defweak) | |
1054 | { | |
1055 | sec = h->root.u.def.section; | |
1056 | *relocation = (h->root.u.def.value | |
1057 | + sec->output_section->vma | |
1058 | + sec->output_offset); | |
1059 | } | |
1060 | else if (h->root.type == bfd_link_hash_undefweak) | |
1061 | *relocation = 0; | |
1062 | else | |
1063 | { | |
1064 | if (!((*info->callbacks->undefined_symbol) | |
1065 | (info, h->root.root.string, abfd, | |
1066 | sec, rel->r_offset, TRUE))) | |
1067 | return FALSE; | |
1068 | *relocation = 0; | |
1069 | } | |
1070 | *is_far = (h && (h->other & STO_M68HC12_FAR)); | |
1071 | stub_name = h->root.root.string; | |
1072 | } | |
1073 | ||
1074 | if (h != NULL) | |
1075 | *name = h->root.root.string; | |
1076 | else | |
1077 | { | |
1078 | *name = (bfd_elf_string_from_elf_section | |
1079 | (abfd, symtab_hdr->sh_link, sym->st_name)); | |
1080 | if (*name == NULL || **name == '\0') | |
1081 | *name = bfd_section_name (input_bfd, sec); | |
1082 | } | |
1083 | ||
1084 | if (*is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16) | |
1085 | { | |
1086 | struct elf32_m68hc11_stub_hash_entry* stub; | |
1087 | struct m68hc11_elf_link_hash_table *htab; | |
1088 | ||
1089 | htab = m68hc11_elf_hash_table (info); | |
1090 | stub = m68hc12_stub_hash_lookup (htab->stub_hash_table, | |
1091 | *name, FALSE, FALSE); | |
1092 | if (stub) | |
1093 | { | |
1094 | *relocation = stub->stub_offset | |
1095 | + stub->stub_sec->output_section->vma | |
1096 | + stub->stub_sec->output_offset; | |
1097 | *is_far = FALSE; | |
1098 | } | |
1099 | } | |
1100 | return TRUE; | |
1101 | } | |
1102 | ||
1103 | /* Relocate a 68hc11/68hc12 ELF section. */ | |
1104 | bfd_boolean | |
1105 | elf32_m68hc11_relocate_section (output_bfd, info, input_bfd, input_section, | |
1106 | contents, relocs, local_syms, local_sections) | |
1107 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
1108 | struct bfd_link_info *info; | |
1109 | bfd *input_bfd; | |
1110 | asection *input_section; | |
1111 | bfd_byte *contents; | |
1112 | Elf_Internal_Rela *relocs; | |
1113 | Elf_Internal_Sym *local_syms; | |
1114 | asection **local_sections; | |
1115 | { | |
1116 | Elf_Internal_Shdr *symtab_hdr; | |
1117 | struct elf_link_hash_entry **sym_hashes; | |
1118 | Elf_Internal_Rela *rel, *relend; | |
1119 | const char *name; | |
1120 | struct m68hc11_page_info *pinfo; | |
1121 | struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd); | |
1122 | ||
1123 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1124 | sym_hashes = elf_sym_hashes (input_bfd); | |
1125 | ||
1126 | /* Get memory bank parameters. */ | |
1127 | m68hc11_elf_get_bank_parameters (info); | |
1128 | pinfo = &m68hc11_elf_hash_table (info)->pinfo; | |
1129 | ||
1130 | rel = relocs; | |
1131 | relend = relocs + input_section->reloc_count; | |
1132 | for (; rel < relend; rel++) | |
1133 | { | |
1134 | int r_type; | |
1135 | arelent arel; | |
1136 | reloc_howto_type *howto; | |
1137 | unsigned long r_symndx; | |
1138 | Elf_Internal_Sym *sym; | |
1139 | asection *sec; | |
1140 | bfd_vma relocation; | |
1141 | bfd_reloc_status_type r = bfd_reloc_undefined; | |
1142 | bfd_vma phys_page; | |
1143 | bfd_vma phys_addr; | |
1144 | bfd_vma insn_addr; | |
1145 | bfd_vma insn_page; | |
1146 | bfd_boolean is_far; | |
1147 | ||
1148 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1149 | r_type = ELF32_R_TYPE (rel->r_info); | |
1150 | ||
1151 | if (r_type == R_M68HC11_GNU_VTENTRY | |
1152 | || r_type == R_M68HC11_GNU_VTINHERIT ) | |
1153 | continue; | |
1154 | ||
1155 | if (info->relocateable) | |
1156 | { | |
1157 | /* This is a relocateable link. We don't have to change | |
1158 | anything, unless the reloc is against a section symbol, | |
1159 | in which case we have to adjust according to where the | |
1160 | section symbol winds up in the output section. */ | |
1161 | if (r_symndx < symtab_hdr->sh_info) | |
1162 | { | |
1163 | sym = local_syms + r_symndx; | |
1164 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1165 | { | |
1166 | sec = local_sections[r_symndx]; | |
1167 | rel->r_addend += sec->output_offset + sym->st_value; | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | continue; | |
1172 | } | |
1173 | (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel); | |
1174 | howto = arel.howto; | |
1175 | ||
1176 | m68hc11_get_relocation_value (input_bfd, info, | |
1177 | local_sections, local_syms, | |
1178 | rel, &name, &relocation, &is_far); | |
1179 | ||
1180 | /* Do the memory bank mapping. */ | |
1181 | phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend); | |
1182 | phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend); | |
1183 | switch (r_type) | |
1184 | { | |
1185 | case R_M68HC11_24: | |
1186 | /* Reloc used by 68HC12 call instruction. */ | |
1187 | bfd_put_16 (input_bfd, phys_addr, | |
1188 | (bfd_byte*) contents + rel->r_offset); | |
1189 | bfd_put_8 (input_bfd, phys_page, | |
1190 | (bfd_byte*) contents + rel->r_offset + 2); | |
1191 | r = bfd_reloc_ok; | |
1192 | r_type = R_M68HC11_NONE; | |
1193 | break; | |
1194 | ||
1195 | case R_M68HC11_NONE: | |
1196 | r = bfd_reloc_ok; | |
1197 | break; | |
1198 | ||
1199 | case R_M68HC11_LO16: | |
1200 | /* Reloc generated by %addr(expr) gas to obtain the | |
1201 | address as mapped in the memory bank window. */ | |
1202 | relocation = phys_addr; | |
1203 | break; | |
1204 | ||
1205 | case R_M68HC11_PAGE: | |
1206 | /* Reloc generated by %page(expr) gas to obtain the | |
1207 | page number associated with the address. */ | |
1208 | relocation = phys_page; | |
1209 | break; | |
1210 | ||
1211 | case R_M68HC11_16: | |
1212 | /* Get virtual address of instruction having the relocation. */ | |
1213 | if (is_far) | |
1214 | { | |
1215 | const char* msg; | |
1216 | char* buf; | |
1217 | msg = _("Reference to the far symbol `%s' using a wrong " | |
1218 | "relocation may result in incorrect execution"); | |
1219 | buf = alloca (strlen (msg) + strlen (name) + 10); | |
1220 | sprintf (buf, msg, name); | |
1221 | ||
1222 | (* info->callbacks->warning) | |
1223 | (info, buf, name, input_bfd, NULL, rel->r_offset); | |
1224 | } | |
1225 | ||
1226 | /* Get virtual address of instruction having the relocation. */ | |
1227 | insn_addr = input_section->output_section->vma | |
1228 | + input_section->output_offset | |
1229 | + rel->r_offset; | |
1230 | ||
1231 | insn_page = m68hc11_phys_page (pinfo, insn_addr); | |
1232 | ||
1233 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend) | |
1234 | && m68hc11_addr_is_banked (pinfo, insn_addr) | |
1235 | && phys_page != insn_page) | |
1236 | { | |
1237 | const char* msg; | |
1238 | char* buf; | |
1239 | ||
1240 | msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank " | |
1241 | "as current banked address [%lx:%04lx] (%lx)"); | |
1242 | ||
1243 | buf = alloca (strlen (msg) + 128); | |
1244 | sprintf (buf, msg, phys_page, phys_addr, | |
1245 | (long) (relocation + rel->r_addend), | |
1246 | insn_page, m68hc11_phys_addr (pinfo, insn_addr), | |
1247 | (long) (insn_addr)); | |
1248 | if (!((*info->callbacks->warning) | |
1249 | (info, buf, name, input_bfd, input_section, | |
1250 | rel->r_offset))) | |
1251 | return FALSE; | |
1252 | break; | |
1253 | } | |
1254 | if (phys_page != 0 && insn_page == 0) | |
1255 | { | |
1256 | const char* msg; | |
1257 | char* buf; | |
1258 | ||
1259 | msg = _("reference to a banked address [%lx:%04lx] in the " | |
1260 | "normal address space at %04lx"); | |
1261 | ||
1262 | buf = alloca (strlen (msg) + 128); | |
1263 | sprintf (buf, msg, phys_page, phys_addr, insn_addr); | |
1264 | if (!((*info->callbacks->warning) | |
1265 | (info, buf, name, input_bfd, input_section, | |
1266 | insn_addr))) | |
1267 | return FALSE; | |
1268 | ||
1269 | relocation = phys_addr; | |
1270 | break; | |
1271 | } | |
1272 | ||
1273 | /* If this is a banked address use the phys_addr so that | |
1274 | we stay in the banked window. */ | |
1275 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)) | |
1276 | relocation = phys_addr; | |
1277 | break; | |
1278 | } | |
1279 | if (r_type != R_M68HC11_NONE) | |
1280 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1281 | contents, rel->r_offset, | |
1282 | relocation, rel->r_addend); | |
1283 | ||
1284 | if (r != bfd_reloc_ok) | |
1285 | { | |
1286 | const char * msg = (const char *) 0; | |
1287 | ||
1288 | switch (r) | |
1289 | { | |
1290 | case bfd_reloc_overflow: | |
1291 | if (!((*info->callbacks->reloc_overflow) | |
1292 | (info, name, howto->name, (bfd_vma) 0, | |
1293 | input_bfd, input_section, rel->r_offset))) | |
1294 | return FALSE; | |
1295 | break; | |
1296 | ||
1297 | case bfd_reloc_undefined: | |
1298 | if (!((*info->callbacks->undefined_symbol) | |
1299 | (info, name, input_bfd, input_section, | |
1300 | rel->r_offset, TRUE))) | |
1301 | return FALSE; | |
1302 | break; | |
1303 | ||
1304 | case bfd_reloc_outofrange: | |
1305 | msg = _ ("internal error: out of range error"); | |
1306 | goto common_error; | |
1307 | ||
1308 | case bfd_reloc_notsupported: | |
1309 | msg = _ ("internal error: unsupported relocation error"); | |
1310 | goto common_error; | |
1311 | ||
1312 | case bfd_reloc_dangerous: | |
1313 | msg = _ ("internal error: dangerous error"); | |
1314 | goto common_error; | |
1315 | ||
1316 | default: | |
1317 | msg = _ ("internal error: unknown error"); | |
1318 | /* fall through */ | |
1319 | ||
1320 | common_error: | |
1321 | if (!((*info->callbacks->warning) | |
1322 | (info, msg, name, input_bfd, input_section, | |
1323 | rel->r_offset))) | |
1324 | return FALSE; | |
1325 | break; | |
1326 | } | |
1327 | } | |
1328 | } | |
1329 | ||
1330 | return TRUE; | |
1331 | } | |
1332 | ||
1333 | ||
1334 | \f | |
1335 | /* Set and control ELF flags in ELF header. */ | |
1336 | ||
1337 | bfd_boolean | |
1338 | _bfd_m68hc11_elf_set_private_flags (abfd, flags) | |
1339 | bfd *abfd; | |
1340 | flagword flags; | |
1341 | { | |
1342 | BFD_ASSERT (!elf_flags_init (abfd) | |
1343 | || elf_elfheader (abfd)->e_flags == flags); | |
1344 | ||
1345 | elf_elfheader (abfd)->e_flags = flags; | |
1346 | elf_flags_init (abfd) = TRUE; | |
1347 | return TRUE; | |
1348 | } | |
1349 | ||
1350 | /* Merge backend specific data from an object file to the output | |
1351 | object file when linking. */ | |
1352 | ||
1353 | bfd_boolean | |
1354 | _bfd_m68hc11_elf_merge_private_bfd_data (ibfd, obfd) | |
1355 | bfd *ibfd; | |
1356 | bfd *obfd; | |
1357 | { | |
1358 | flagword old_flags; | |
1359 | flagword new_flags; | |
1360 | bfd_boolean ok = TRUE; | |
1361 | ||
1362 | /* Check if we have the same endianess */ | |
1363 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) | |
1364 | return FALSE; | |
1365 | ||
1366 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1367 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1368 | return TRUE; | |
1369 | ||
1370 | new_flags = elf_elfheader (ibfd)->e_flags; | |
1371 | elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI; | |
1372 | old_flags = elf_elfheader (obfd)->e_flags; | |
1373 | ||
1374 | if (! elf_flags_init (obfd)) | |
1375 | { | |
1376 | elf_flags_init (obfd) = TRUE; | |
1377 | elf_elfheader (obfd)->e_flags = new_flags; | |
1378 | elf_elfheader (obfd)->e_ident[EI_CLASS] | |
1379 | = elf_elfheader (ibfd)->e_ident[EI_CLASS]; | |
1380 | ||
1381 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
1382 | && bfd_get_arch_info (obfd)->the_default) | |
1383 | { | |
1384 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
1385 | bfd_get_mach (ibfd))) | |
1386 | return FALSE; | |
1387 | } | |
1388 | ||
1389 | return TRUE; | |
1390 | } | |
1391 | ||
1392 | /* Check ABI compatibility. */ | |
1393 | if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) | |
1394 | { | |
1395 | (*_bfd_error_handler) | |
1396 | (_("%s: linking files compiled for 16-bit integers (-mshort) " | |
1397 | "and others for 32-bit integers"), | |
1398 | bfd_archive_filename (ibfd)); | |
1399 | ok = FALSE; | |
1400 | } | |
1401 | if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) | |
1402 | { | |
1403 | (*_bfd_error_handler) | |
1404 | (_("%s: linking files compiled for 32-bit double (-fshort-double) " | |
1405 | "and others for 64-bit double"), | |
1406 | bfd_archive_filename (ibfd)); | |
1407 | ok = FALSE; | |
1408 | } | |
47247ced SC |
1409 | |
1410 | /* Processor compatibility. */ | |
1411 | if (!EF_M68HC11_CAN_MERGE_MACH (new_flags, old_flags)) | |
1412 | { | |
1413 | (*_bfd_error_handler) | |
1414 | (_("%s: linking files compiled for HCS12 with " | |
1415 | "others compiled for HC12"), | |
1416 | bfd_archive_filename (ibfd)); | |
1417 | ok = FALSE; | |
1418 | } | |
1419 | new_flags = ((new_flags & ~EF_M68HC11_MACH_MASK) | |
1420 | | (EF_M68HC11_MERGE_MACH (new_flags, old_flags))); | |
1421 | ||
1422 | elf_elfheader (obfd)->e_flags = new_flags; | |
1423 | ||
3a65329d SC |
1424 | new_flags &= ~EF_M68HC11_ABI; |
1425 | old_flags &= ~EF_M68HC11_ABI; | |
1426 | ||
1427 | /* Warn about any other mismatches */ | |
1428 | if (new_flags != old_flags) | |
1429 | { | |
1430 | (*_bfd_error_handler) | |
1431 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), | |
1432 | bfd_archive_filename (ibfd), (unsigned long) new_flags, | |
1433 | (unsigned long) old_flags); | |
1434 | ok = FALSE; | |
1435 | } | |
1436 | ||
1437 | if (! ok) | |
1438 | { | |
1439 | bfd_set_error (bfd_error_bad_value); | |
1440 | return FALSE; | |
1441 | } | |
1442 | ||
1443 | return TRUE; | |
1444 | } | |
1445 | ||
1446 | bfd_boolean | |
1447 | _bfd_m68hc11_elf_print_private_bfd_data (abfd, ptr) | |
1448 | bfd *abfd; | |
1449 | PTR ptr; | |
1450 | { | |
1451 | FILE *file = (FILE *) ptr; | |
1452 | ||
1453 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
1454 | ||
1455 | /* Print normal ELF private data. */ | |
1456 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
1457 | ||
1458 | /* xgettext:c-format */ | |
1459 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
1460 | ||
1461 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) | |
1462 | fprintf (file, _("[abi=32-bit int, ")); | |
1463 | else | |
1464 | fprintf (file, _("[abi=16-bit int, ")); | |
1465 | ||
1466 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) | |
1467 | fprintf (file, _("64-bit double, ")); | |
1468 | else | |
1469 | fprintf (file, _("32-bit double, ")); | |
1470 | ||
1471 | if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0) | |
1472 | fprintf (file, _("cpu=HC11]")); | |
1473 | else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH) | |
1474 | fprintf (file, _("cpu=HCS12]")); | |
1475 | else | |
1476 | fprintf (file, _("cpu=HC12]")); | |
1477 | ||
1478 | if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS) | |
1479 | fprintf (file, _(" [memory=bank-model]")); | |
1480 | else | |
1481 | fprintf (file, _(" [memory=flat]")); | |
1482 | ||
1483 | fputc ('\n', file); | |
1484 | ||
1485 | return TRUE; | |
1486 | } | |
1487 | ||
1488 | static void scan_sections_for_abi (abfd, asect, arg) | |
1489 | bfd* abfd ATTRIBUTE_UNUSED; | |
1490 | asection* asect; | |
1491 | PTR arg; | |
1492 | { | |
1493 | struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg; | |
1494 | ||
1495 | if (asect->vma >= p->pinfo->bank_virtual) | |
1496 | p->use_memory_banks = TRUE; | |
1497 | } | |
1498 | ||
1499 | /* Tweak the OSABI field of the elf header. */ | |
1500 | ||
1501 | void | |
1502 | elf32_m68hc11_post_process_headers (abfd, link_info) | |
1503 | bfd *abfd; | |
1504 | struct bfd_link_info *link_info; | |
1505 | { | |
1506 | struct m68hc11_scan_param param; | |
1507 | ||
1508 | if (link_info == 0) | |
1509 | return; | |
1510 | ||
1511 | m68hc11_elf_get_bank_parameters (link_info); | |
1512 | ||
1513 | param.use_memory_banks = FALSE; | |
1514 | param.pinfo = &m68hc11_elf_hash_table (link_info)->pinfo; | |
1515 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); | |
1516 | if (param.use_memory_banks) | |
1517 | { | |
1518 | Elf_Internal_Ehdr * i_ehdrp; | |
1519 | ||
1520 | i_ehdrp = elf_elfheader (abfd); | |
1521 | i_ehdrp->e_flags |= E_M68HC12_BANKS; | |
1522 | } | |
1523 | } | |
1524 |