Commit | Line | Data |
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3a65329d | 1 | /* Motorola 68HC11/HC12-specific support for 32-bit ELF |
4b95cf5c | 2 | Copyright (C) 1999-2014 Free Software Foundation, Inc. |
3a65329d SC |
3 | Contributed by Stephane Carrez (stcarrez@nerim.fr) |
4 | ||
cd123cb7 NC |
5 | This file is part of BFD, the Binary File Descriptor library. |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
3a65329d | 21 | |
3a65329d | 22 | #include "sysdep.h" |
df7b86aa | 23 | #include "alloca-conf.h" |
3db64b00 | 24 | #include "bfd.h" |
3a65329d SC |
25 | #include "bfdlink.h" |
26 | #include "libbfd.h" | |
27 | #include "elf-bfd.h" | |
28 | #include "elf32-m68hc1x.h" | |
29 | #include "elf/m68hc11.h" | |
30 | #include "opcode/m68hc11.h" | |
31 | ||
32 | ||
33 | #define m68hc12_stub_hash_lookup(table, string, create, copy) \ | |
34 | ((struct elf32_m68hc11_stub_hash_entry *) \ | |
35 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
36 | ||
37 | static struct elf32_m68hc11_stub_hash_entry* m68hc12_add_stub | |
0a6a3ebe SC |
38 | (const char *stub_name, |
39 | asection *section, | |
40 | struct m68hc11_elf_link_hash_table *htab); | |
3a65329d SC |
41 | |
42 | static struct bfd_hash_entry *stub_hash_newfunc | |
0a6a3ebe | 43 | (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); |
3a65329d | 44 | |
0a6a3ebe SC |
45 | static void m68hc11_elf_set_symbol (bfd* abfd, struct bfd_link_info *info, |
46 | const char* name, bfd_vma value, | |
47 | asection* sec); | |
3a65329d SC |
48 | |
49 | static bfd_boolean m68hc11_elf_export_one_stub | |
0a6a3ebe | 50 | (struct bfd_hash_entry *gen_entry, void *in_arg); |
3a65329d | 51 | |
2c3fc389 | 52 | static void scan_sections_for_abi (bfd*, asection*, void *); |
3a65329d SC |
53 | |
54 | struct m68hc11_scan_param | |
55 | { | |
56 | struct m68hc11_page_info* pinfo; | |
57 | bfd_boolean use_memory_banks; | |
58 | }; | |
59 | ||
60 | ||
61 | /* Create a 68HC11/68HC12 ELF linker hash table. */ | |
62 | ||
63 | struct m68hc11_elf_link_hash_table* | |
0a6a3ebe | 64 | m68hc11_elf_hash_table_create (bfd *abfd) |
3a65329d SC |
65 | { |
66 | struct m68hc11_elf_link_hash_table *ret; | |
67 | bfd_size_type amt = sizeof (struct m68hc11_elf_link_hash_table); | |
68 | ||
7bf52ea2 | 69 | ret = (struct m68hc11_elf_link_hash_table *) bfd_zmalloc (amt); |
3a65329d SC |
70 | if (ret == (struct m68hc11_elf_link_hash_table *) NULL) |
71 | return NULL; | |
72 | ||
66eb6687 AM |
73 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
74 | _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
75 | sizeof (struct elf_link_hash_entry), |
76 | M68HC11_ELF_DATA)) | |
3a65329d | 77 | { |
47247ced | 78 | free (ret); |
3a65329d SC |
79 | return NULL; |
80 | } | |
81 | ||
82 | /* Init the stub hash table too. */ | |
83 | amt = sizeof (struct bfd_hash_table); | |
84 | ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt); | |
85 | if (ret->stub_hash_table == NULL) | |
86 | { | |
47247ced | 87 | free (ret); |
3a65329d SC |
88 | return NULL; |
89 | } | |
66eb6687 AM |
90 | if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc, |
91 | sizeof (struct elf32_m68hc11_stub_hash_entry))) | |
3a65329d SC |
92 | return NULL; |
93 | ||
3a65329d SC |
94 | return ret; |
95 | } | |
96 | ||
97 | /* Free the derived linker hash table. */ | |
98 | ||
99 | void | |
0a6a3ebe | 100 | m68hc11_elf_bfd_link_hash_table_free (struct bfd_link_hash_table *hash) |
3a65329d SC |
101 | { |
102 | struct m68hc11_elf_link_hash_table *ret | |
103 | = (struct m68hc11_elf_link_hash_table *) hash; | |
104 | ||
105 | bfd_hash_table_free (ret->stub_hash_table); | |
106 | free (ret->stub_hash_table); | |
9f7c3e5e | 107 | _bfd_elf_link_hash_table_free (hash); |
3a65329d SC |
108 | } |
109 | ||
110 | /* Assorted hash table functions. */ | |
111 | ||
112 | /* Initialize an entry in the stub hash table. */ | |
113 | ||
114 | static struct bfd_hash_entry * | |
0a6a3ebe SC |
115 | stub_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
116 | const char *string) | |
3a65329d SC |
117 | { |
118 | /* Allocate the structure if it has not already been allocated by a | |
119 | subclass. */ | |
120 | if (entry == NULL) | |
121 | { | |
122 | entry = bfd_hash_allocate (table, | |
123 | sizeof (struct elf32_m68hc11_stub_hash_entry)); | |
124 | if (entry == NULL) | |
125 | return entry; | |
126 | } | |
127 | ||
128 | /* Call the allocation method of the superclass. */ | |
129 | entry = bfd_hash_newfunc (entry, table, string); | |
130 | if (entry != NULL) | |
131 | { | |
132 | struct elf32_m68hc11_stub_hash_entry *eh; | |
133 | ||
134 | /* Initialize the local fields. */ | |
135 | eh = (struct elf32_m68hc11_stub_hash_entry *) entry; | |
136 | eh->stub_sec = NULL; | |
137 | eh->stub_offset = 0; | |
138 | eh->target_value = 0; | |
139 | eh->target_section = NULL; | |
140 | } | |
141 | ||
142 | return entry; | |
143 | } | |
144 | ||
145 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
146 | stub entry are initialised. */ | |
147 | ||
148 | static struct elf32_m68hc11_stub_hash_entry * | |
0a6a3ebe SC |
149 | m68hc12_add_stub (const char *stub_name, asection *section, |
150 | struct m68hc11_elf_link_hash_table *htab) | |
3a65329d SC |
151 | { |
152 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
153 | ||
154 | /* Enter this entry into the linker stub hash table. */ | |
155 | stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name, | |
156 | TRUE, FALSE); | |
157 | if (stub_entry == NULL) | |
158 | { | |
d003868e AM |
159 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), |
160 | section->owner, stub_name); | |
3a65329d SC |
161 | return NULL; |
162 | } | |
163 | ||
164 | if (htab->stub_section == 0) | |
165 | { | |
166 | htab->stub_section = (*htab->add_stub_section) (".tramp", | |
167 | htab->tramp_section); | |
168 | } | |
169 | ||
170 | stub_entry->stub_sec = htab->stub_section; | |
171 | stub_entry->stub_offset = 0; | |
172 | return stub_entry; | |
173 | } | |
174 | ||
175 | /* Hook called by the linker routine which adds symbols from an object | |
176 | file. We use it for identify far symbols and force a loading of | |
177 | the trampoline handler. */ | |
178 | ||
179 | bfd_boolean | |
0a6a3ebe | 180 | elf32_m68hc11_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, |
555cd476 | 181 | Elf_Internal_Sym *sym, |
0a6a3ebe SC |
182 | const char **namep ATTRIBUTE_UNUSED, |
183 | flagword *flagsp ATTRIBUTE_UNUSED, | |
184 | asection **secp ATTRIBUTE_UNUSED, | |
185 | bfd_vma *valp ATTRIBUTE_UNUSED) | |
3a65329d SC |
186 | { |
187 | if (sym->st_other & STO_M68HC12_FAR) | |
188 | { | |
189 | struct elf_link_hash_entry *h; | |
190 | ||
191 | h = (struct elf_link_hash_entry *) | |
192 | bfd_link_hash_lookup (info->hash, "__far_trampoline", | |
193 | FALSE, FALSE, FALSE); | |
194 | if (h == NULL) | |
195 | { | |
196 | struct bfd_link_hash_entry* entry = NULL; | |
197 | ||
198 | _bfd_generic_link_add_one_symbol (info, abfd, | |
199 | "__far_trampoline", | |
200 | BSF_GLOBAL, | |
201 | bfd_und_section_ptr, | |
202 | (bfd_vma) 0, (const char*) NULL, | |
203 | FALSE, FALSE, &entry); | |
204 | } | |
205 | ||
206 | } | |
207 | return TRUE; | |
208 | } | |
209 | ||
5efbbc43 AM |
210 | /* Merge non-visibility st_other attributes, STO_M68HC12_FAR and |
211 | STO_M68HC12_INTERRUPT. */ | |
212 | ||
213 | void | |
214 | elf32_m68hc11_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
215 | const Elf_Internal_Sym *isym, | |
216 | bfd_boolean definition, | |
217 | bfd_boolean dynamic ATTRIBUTE_UNUSED) | |
218 | { | |
219 | if (definition) | |
220 | h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) | |
221 | | ELF_ST_VISIBILITY (h->other)); | |
222 | } | |
223 | ||
3a65329d SC |
224 | /* External entry points for sizing and building linker stubs. */ |
225 | ||
226 | /* Set up various things so that we can make a list of input sections | |
227 | for each output section included in the link. Returns -1 on error, | |
228 | 0 when no stubs will be needed, and 1 on success. */ | |
229 | ||
230 | int | |
0a6a3ebe | 231 | elf32_m68hc11_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) |
3a65329d SC |
232 | { |
233 | bfd *input_bfd; | |
234 | unsigned int bfd_count; | |
235 | int top_id, top_index; | |
236 | asection *section; | |
237 | asection **input_list, **list; | |
238 | bfd_size_type amt; | |
239 | asection *text_section; | |
240 | struct m68hc11_elf_link_hash_table *htab; | |
241 | ||
242 | htab = m68hc11_elf_hash_table (info); | |
4dfe6ac6 NC |
243 | if (htab == NULL) |
244 | return -1; | |
3a65329d | 245 | |
f13a99db | 246 | if (bfd_get_flavour (info->output_bfd) != bfd_target_elf_flavour) |
3a65329d SC |
247 | return 0; |
248 | ||
249 | /* Count the number of input BFDs and find the top input section id. | |
250 | Also search for an existing ".tramp" section so that we know | |
251 | where generated trampolines must go. Default to ".text" if we | |
252 | can't find it. */ | |
253 | htab->tramp_section = 0; | |
254 | text_section = 0; | |
255 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
256 | input_bfd != NULL; | |
257 | input_bfd = input_bfd->link_next) | |
258 | { | |
259 | bfd_count += 1; | |
260 | for (section = input_bfd->sections; | |
261 | section != NULL; | |
262 | section = section->next) | |
263 | { | |
264 | const char* name = bfd_get_section_name (input_bfd, section); | |
265 | ||
266 | if (!strcmp (name, ".tramp")) | |
267 | htab->tramp_section = section; | |
268 | ||
269 | if (!strcmp (name, ".text")) | |
270 | text_section = section; | |
271 | ||
272 | if (top_id < section->id) | |
273 | top_id = section->id; | |
274 | } | |
275 | } | |
276 | htab->bfd_count = bfd_count; | |
277 | if (htab->tramp_section == 0) | |
278 | htab->tramp_section = text_section; | |
279 | ||
280 | /* We can't use output_bfd->section_count here to find the top output | |
281 | section index as some sections may have been removed, and | |
8423293d | 282 | strip_excluded_output_sections doesn't renumber the indices. */ |
3a65329d SC |
283 | for (section = output_bfd->sections, top_index = 0; |
284 | section != NULL; | |
285 | section = section->next) | |
286 | { | |
287 | if (top_index < section->index) | |
288 | top_index = section->index; | |
289 | } | |
290 | ||
291 | htab->top_index = top_index; | |
292 | amt = sizeof (asection *) * (top_index + 1); | |
293 | input_list = (asection **) bfd_malloc (amt); | |
294 | htab->input_list = input_list; | |
295 | if (input_list == NULL) | |
296 | return -1; | |
297 | ||
298 | /* For sections we aren't interested in, mark their entries with a | |
299 | value we can check later. */ | |
300 | list = input_list + top_index; | |
301 | do | |
302 | *list = bfd_abs_section_ptr; | |
303 | while (list-- != input_list); | |
304 | ||
305 | for (section = output_bfd->sections; | |
306 | section != NULL; | |
307 | section = section->next) | |
308 | { | |
309 | if ((section->flags & SEC_CODE) != 0) | |
310 | input_list[section->index] = NULL; | |
311 | } | |
312 | ||
313 | return 1; | |
314 | } | |
315 | ||
316 | /* Determine and set the size of the stub section for a final link. | |
317 | ||
318 | The basic idea here is to examine all the relocations looking for | |
319 | PC-relative calls to a target that is unreachable with a "bl" | |
320 | instruction. */ | |
321 | ||
322 | bfd_boolean | |
0a6a3ebe SC |
323 | elf32_m68hc11_size_stubs (bfd *output_bfd, bfd *stub_bfd, |
324 | struct bfd_link_info *info, | |
325 | asection * (*add_stub_section) (const char*, asection*)) | |
3a65329d SC |
326 | { |
327 | bfd *input_bfd; | |
328 | asection *section; | |
329 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
330 | unsigned int bfd_indx, bfd_count; | |
331 | bfd_size_type amt; | |
332 | asection *stub_sec; | |
3a65329d SC |
333 | struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info); |
334 | ||
4dfe6ac6 NC |
335 | if (htab == NULL) |
336 | return FALSE; | |
337 | ||
3a65329d SC |
338 | /* Stash our params away. */ |
339 | htab->stub_bfd = stub_bfd; | |
340 | htab->add_stub_section = add_stub_section; | |
341 | ||
342 | /* Count the number of input BFDs and find the top input section id. */ | |
343 | for (input_bfd = info->input_bfds, bfd_count = 0; | |
344 | input_bfd != NULL; | |
345 | input_bfd = input_bfd->link_next) | |
4dfe6ac6 | 346 | bfd_count += 1; |
3a65329d SC |
347 | |
348 | /* We want to read in symbol extension records only once. To do this | |
349 | we need to read in the local symbols in parallel and save them for | |
350 | later use; so hold pointers to the local symbols in an array. */ | |
351 | amt = sizeof (Elf_Internal_Sym *) * bfd_count; | |
352 | all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); | |
353 | if (all_local_syms == NULL) | |
354 | return FALSE; | |
355 | ||
356 | /* Walk over all the input BFDs, swapping in local symbols. */ | |
357 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
358 | input_bfd != NULL; | |
359 | input_bfd = input_bfd->link_next, bfd_indx++) | |
360 | { | |
361 | Elf_Internal_Shdr *symtab_hdr; | |
3a65329d SC |
362 | |
363 | /* We'll need the symbol table in a second. */ | |
364 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
365 | if (symtab_hdr->sh_info == 0) | |
366 | continue; | |
367 | ||
2a0e29b4 SC |
368 | /* We need an array of the local symbols attached to the input bfd. */ |
369 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
370 | if (local_syms == NULL) | |
371 | { | |
372 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
373 | symtab_hdr->sh_info, 0, | |
374 | NULL, NULL, NULL); | |
375 | /* Cache them for elf_link_input_bfd. */ | |
376 | symtab_hdr->contents = (unsigned char *) local_syms; | |
377 | } | |
3a65329d | 378 | if (local_syms == NULL) |
3a65329d | 379 | { |
2a0e29b4 SC |
380 | free (all_local_syms); |
381 | return FALSE; | |
3a65329d SC |
382 | } |
383 | ||
2a0e29b4 | 384 | all_local_syms[bfd_indx] = local_syms; |
3a65329d SC |
385 | } |
386 | ||
387 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
388 | input_bfd != NULL; | |
389 | input_bfd = input_bfd->link_next, bfd_indx++) | |
390 | { | |
391 | Elf_Internal_Shdr *symtab_hdr; | |
3a65329d SC |
392 | struct elf_link_hash_entry ** sym_hashes; |
393 | ||
394 | sym_hashes = elf_sym_hashes (input_bfd); | |
395 | ||
396 | /* We'll need the symbol table in a second. */ | |
397 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
398 | if (symtab_hdr->sh_info == 0) | |
399 | continue; | |
400 | ||
401 | local_syms = all_local_syms[bfd_indx]; | |
402 | ||
403 | /* Walk over each section attached to the input bfd. */ | |
404 | for (section = input_bfd->sections; | |
405 | section != NULL; | |
406 | section = section->next) | |
407 | { | |
408 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
409 | ||
410 | /* If there aren't any relocs, then there's nothing more | |
411 | to do. */ | |
412 | if ((section->flags & SEC_RELOC) == 0 | |
413 | || section->reloc_count == 0) | |
414 | continue; | |
415 | ||
416 | /* If this section is a link-once section that will be | |
417 | discarded, then don't create any stubs. */ | |
418 | if (section->output_section == NULL | |
419 | || section->output_section->owner != output_bfd) | |
420 | continue; | |
421 | ||
422 | /* Get the relocs. */ | |
423 | internal_relocs | |
45d6a902 AM |
424 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
425 | (Elf_Internal_Rela *) NULL, | |
426 | info->keep_memory); | |
3a65329d SC |
427 | if (internal_relocs == NULL) |
428 | goto error_ret_free_local; | |
429 | ||
430 | /* Now examine each relocation. */ | |
431 | irela = internal_relocs; | |
432 | irelaend = irela + section->reloc_count; | |
433 | for (; irela < irelaend; irela++) | |
434 | { | |
435 | unsigned int r_type, r_indx; | |
436 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
437 | asection *sym_sec; | |
438 | bfd_vma sym_value; | |
439 | struct elf_link_hash_entry *hash; | |
440 | const char *stub_name; | |
441 | Elf_Internal_Sym *sym; | |
442 | ||
443 | r_type = ELF32_R_TYPE (irela->r_info); | |
444 | ||
445 | /* Only look at 16-bit relocs. */ | |
446 | if (r_type != (unsigned int) R_M68HC11_16) | |
447 | continue; | |
448 | ||
449 | /* Now determine the call target, its name, value, | |
450 | section. */ | |
451 | r_indx = ELF32_R_SYM (irela->r_info); | |
452 | if (r_indx < symtab_hdr->sh_info) | |
453 | { | |
454 | /* It's a local symbol. */ | |
455 | Elf_Internal_Shdr *hdr; | |
456 | bfd_boolean is_far; | |
457 | ||
458 | sym = local_syms + r_indx; | |
3a65329d SC |
459 | is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); |
460 | if (!is_far) | |
461 | continue; | |
7f888330 | 462 | |
4fbb74a6 AM |
463 | if (sym->st_shndx >= elf_numsections (input_bfd)) |
464 | sym_sec = NULL; | |
465 | else | |
466 | { | |
467 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
468 | sym_sec = hdr->bfd_section; | |
469 | } | |
3a65329d SC |
470 | stub_name = (bfd_elf_string_from_elf_section |
471 | (input_bfd, symtab_hdr->sh_link, | |
472 | sym->st_name)); | |
473 | sym_value = sym->st_value; | |
474 | hash = NULL; | |
475 | } | |
476 | else | |
477 | { | |
478 | /* It's an external symbol. */ | |
479 | int e_indx; | |
480 | ||
481 | e_indx = r_indx - symtab_hdr->sh_info; | |
482 | hash = (struct elf_link_hash_entry *) | |
483 | (sym_hashes[e_indx]); | |
484 | ||
485 | while (hash->root.type == bfd_link_hash_indirect | |
486 | || hash->root.type == bfd_link_hash_warning) | |
487 | hash = ((struct elf_link_hash_entry *) | |
488 | hash->root.u.i.link); | |
489 | ||
490 | if (hash->root.type == bfd_link_hash_defined | |
83774818 SC |
491 | || hash->root.type == bfd_link_hash_defweak |
492 | || hash->root.type == bfd_link_hash_new) | |
3a65329d SC |
493 | { |
494 | if (!(hash->other & STO_M68HC12_FAR)) | |
495 | continue; | |
496 | } | |
497 | else if (hash->root.type == bfd_link_hash_undefweak) | |
498 | { | |
499 | continue; | |
500 | } | |
501 | else if (hash->root.type == bfd_link_hash_undefined) | |
502 | { | |
503 | continue; | |
504 | } | |
505 | else | |
506 | { | |
507 | bfd_set_error (bfd_error_bad_value); | |
508 | goto error_ret_free_internal; | |
509 | } | |
510 | sym_sec = hash->root.u.def.section; | |
511 | sym_value = hash->root.u.def.value; | |
512 | stub_name = hash->root.root.string; | |
513 | } | |
514 | ||
515 | if (!stub_name) | |
516 | goto error_ret_free_internal; | |
517 | ||
518 | stub_entry = m68hc12_stub_hash_lookup | |
519 | (htab->stub_hash_table, | |
520 | stub_name, | |
521 | FALSE, FALSE); | |
522 | if (stub_entry == NULL) | |
523 | { | |
524 | if (add_stub_section == 0) | |
525 | continue; | |
526 | ||
527 | stub_entry = m68hc12_add_stub (stub_name, section, htab); | |
528 | if (stub_entry == NULL) | |
529 | { | |
530 | error_ret_free_internal: | |
531 | if (elf_section_data (section)->relocs == NULL) | |
532 | free (internal_relocs); | |
533 | goto error_ret_free_local; | |
534 | } | |
535 | } | |
536 | ||
537 | stub_entry->target_value = sym_value; | |
538 | stub_entry->target_section = sym_sec; | |
539 | } | |
540 | ||
541 | /* We're done with the internal relocs, free them. */ | |
542 | if (elf_section_data (section)->relocs == NULL) | |
543 | free (internal_relocs); | |
544 | } | |
545 | } | |
546 | ||
547 | if (add_stub_section) | |
548 | { | |
549 | /* OK, we've added some stubs. Find out the new size of the | |
550 | stub sections. */ | |
551 | for (stub_sec = htab->stub_bfd->sections; | |
552 | stub_sec != NULL; | |
553 | stub_sec = stub_sec->next) | |
554 | { | |
eea6121a | 555 | stub_sec->size = 0; |
3a65329d SC |
556 | } |
557 | ||
558 | bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab); | |
559 | } | |
2a0e29b4 | 560 | free (all_local_syms); |
3a65329d SC |
561 | return TRUE; |
562 | ||
563 | error_ret_free_local: | |
2a0e29b4 | 564 | free (all_local_syms); |
3a65329d SC |
565 | return FALSE; |
566 | } | |
567 | ||
568 | /* Export the trampoline addresses in the symbol table. */ | |
569 | static bfd_boolean | |
0a6a3ebe | 570 | m68hc11_elf_export_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
3a65329d SC |
571 | { |
572 | struct bfd_link_info *info; | |
573 | struct m68hc11_elf_link_hash_table *htab; | |
574 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
575 | char* name; | |
576 | bfd_boolean result; | |
577 | ||
578 | info = (struct bfd_link_info *) in_arg; | |
579 | htab = m68hc11_elf_hash_table (info); | |
4dfe6ac6 NC |
580 | if (htab == NULL) |
581 | return FALSE; | |
3a65329d SC |
582 | |
583 | /* Massage our args to the form they really have. */ | |
584 | stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; | |
585 | ||
586 | /* Generate the trampoline according to HC11 or HC12. */ | |
587 | result = (* htab->build_one_stub) (gen_entry, in_arg); | |
588 | ||
589 | /* Make a printable name that does not conflict with the real function. */ | |
590 | name = alloca (strlen (stub_entry->root.string) + 16); | |
591 | sprintf (name, "tramp.%s", stub_entry->root.string); | |
592 | ||
593 | /* Export the symbol for debugging/disassembling. */ | |
594 | m68hc11_elf_set_symbol (htab->stub_bfd, info, name, | |
595 | stub_entry->stub_offset, | |
596 | stub_entry->stub_sec); | |
597 | return result; | |
598 | } | |
599 | ||
600 | /* Export a symbol or set its value and section. */ | |
601 | static void | |
0a6a3ebe SC |
602 | m68hc11_elf_set_symbol (bfd *abfd, struct bfd_link_info *info, |
603 | const char *name, bfd_vma value, asection *sec) | |
3a65329d SC |
604 | { |
605 | struct elf_link_hash_entry *h; | |
606 | ||
607 | h = (struct elf_link_hash_entry *) | |
608 | bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE); | |
609 | if (h == NULL) | |
610 | { | |
611 | _bfd_generic_link_add_one_symbol (info, abfd, | |
612 | name, | |
613 | BSF_GLOBAL, | |
614 | sec, | |
615 | value, | |
616 | (const char*) NULL, | |
617 | TRUE, FALSE, NULL); | |
618 | } | |
619 | else | |
620 | { | |
621 | h->root.type = bfd_link_hash_defined; | |
622 | h->root.u.def.value = value; | |
623 | h->root.u.def.section = sec; | |
624 | } | |
625 | } | |
626 | ||
627 | ||
628 | /* Build all the stubs associated with the current output file. The | |
629 | stubs are kept in a hash table attached to the main linker hash | |
630 | table. This function is called via m68hc12elf_finish in the | |
631 | linker. */ | |
632 | ||
633 | bfd_boolean | |
0a6a3ebe | 634 | elf32_m68hc11_build_stubs (bfd *abfd, struct bfd_link_info *info) |
3a65329d SC |
635 | { |
636 | asection *stub_sec; | |
637 | struct bfd_hash_table *table; | |
638 | struct m68hc11_elf_link_hash_table *htab; | |
639 | struct m68hc11_scan_param param; | |
640 | ||
641 | m68hc11_elf_get_bank_parameters (info); | |
642 | htab = m68hc11_elf_hash_table (info); | |
4dfe6ac6 NC |
643 | if (htab == NULL) |
644 | return FALSE; | |
3a65329d SC |
645 | |
646 | for (stub_sec = htab->stub_bfd->sections; | |
647 | stub_sec != NULL; | |
648 | stub_sec = stub_sec->next) | |
649 | { | |
650 | bfd_size_type size; | |
651 | ||
652 | /* Allocate memory to hold the linker stubs. */ | |
eea6121a | 653 | size = stub_sec->size; |
3a65329d SC |
654 | stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); |
655 | if (stub_sec->contents == NULL && size != 0) | |
656 | return FALSE; | |
eea6121a | 657 | stub_sec->size = 0; |
3a65329d SC |
658 | } |
659 | ||
660 | /* Build the stubs as directed by the stub hash table. */ | |
661 | table = htab->stub_hash_table; | |
662 | bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info); | |
68ffbac6 | 663 | |
3a65329d SC |
664 | /* Scan the output sections to see if we use the memory banks. |
665 | If so, export the symbols that define how the memory banks | |
666 | are mapped. This is used by gdb and the simulator to obtain | |
667 | the information. It can be used by programs to burn the eprom | |
668 | at the good addresses. */ | |
669 | param.use_memory_banks = FALSE; | |
670 | param.pinfo = &htab->pinfo; | |
671 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); | |
672 | if (param.use_memory_banks) | |
673 | { | |
674 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME, | |
675 | htab->pinfo.bank_physical, | |
676 | bfd_abs_section_ptr); | |
677 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
678 | htab->pinfo.bank_virtual, | |
679 | bfd_abs_section_ptr); | |
680 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME, | |
681 | htab->pinfo.bank_size, | |
682 | bfd_abs_section_ptr); | |
683 | } | |
684 | ||
685 | return TRUE; | |
686 | } | |
687 | ||
688 | void | |
0a6a3ebe | 689 | m68hc11_elf_get_bank_parameters (struct bfd_link_info *info) |
3a65329d SC |
690 | { |
691 | unsigned i; | |
692 | struct m68hc11_page_info *pinfo; | |
693 | struct bfd_link_hash_entry *h; | |
4dfe6ac6 NC |
694 | struct m68hc11_elf_link_hash_table *htab; |
695 | ||
696 | htab = m68hc11_elf_hash_table (info); | |
697 | if (htab == NULL) | |
698 | return; | |
3a65329d | 699 | |
4dfe6ac6 | 700 | pinfo = & htab->pinfo; |
3a65329d SC |
701 | if (pinfo->bank_param_initialized) |
702 | return; | |
703 | ||
704 | pinfo->bank_virtual = M68HC12_BANK_VIRT; | |
705 | pinfo->bank_mask = M68HC12_BANK_MASK; | |
706 | pinfo->bank_physical = M68HC12_BANK_BASE; | |
707 | pinfo->bank_shift = M68HC12_BANK_SHIFT; | |
708 | pinfo->bank_size = 1 << M68HC12_BANK_SHIFT; | |
709 | ||
710 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME, | |
711 | FALSE, FALSE, TRUE); | |
712 | if (h != (struct bfd_link_hash_entry*) NULL | |
713 | && h->type == bfd_link_hash_defined) | |
714 | pinfo->bank_physical = (h->u.def.value | |
715 | + h->u.def.section->output_section->vma | |
716 | + h->u.def.section->output_offset); | |
717 | ||
718 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
719 | FALSE, FALSE, TRUE); | |
720 | if (h != (struct bfd_link_hash_entry*) NULL | |
721 | && h->type == bfd_link_hash_defined) | |
722 | pinfo->bank_virtual = (h->u.def.value | |
723 | + h->u.def.section->output_section->vma | |
724 | + h->u.def.section->output_offset); | |
725 | ||
726 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME, | |
727 | FALSE, FALSE, TRUE); | |
728 | if (h != (struct bfd_link_hash_entry*) NULL | |
729 | && h->type == bfd_link_hash_defined) | |
730 | pinfo->bank_size = (h->u.def.value | |
731 | + h->u.def.section->output_section->vma | |
732 | + h->u.def.section->output_offset); | |
733 | ||
734 | pinfo->bank_shift = 0; | |
735 | for (i = pinfo->bank_size; i != 0; i >>= 1) | |
736 | pinfo->bank_shift++; | |
737 | pinfo->bank_shift--; | |
738 | pinfo->bank_mask = (1 << pinfo->bank_shift) - 1; | |
739 | pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size; | |
740 | pinfo->bank_param_initialized = 1; | |
741 | ||
742 | h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE, | |
743 | FALSE, TRUE); | |
744 | if (h != (struct bfd_link_hash_entry*) NULL | |
745 | && h->type == bfd_link_hash_defined) | |
746 | pinfo->trampoline_addr = (h->u.def.value | |
747 | + h->u.def.section->output_section->vma | |
748 | + h->u.def.section->output_offset); | |
749 | } | |
750 | ||
751 | /* Return 1 if the address is in banked memory. | |
752 | This can be applied to a virtual address and to a physical address. */ | |
753 | int | |
0a6a3ebe | 754 | m68hc11_addr_is_banked (struct m68hc11_page_info *pinfo, bfd_vma addr) |
3a65329d SC |
755 | { |
756 | if (addr >= pinfo->bank_virtual) | |
757 | return 1; | |
758 | ||
759 | if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end) | |
760 | return 1; | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | /* Return the physical address seen by the processor, taking | |
766 | into account banked memory. */ | |
767 | bfd_vma | |
0a6a3ebe | 768 | m68hc11_phys_addr (struct m68hc11_page_info *pinfo, bfd_vma addr) |
3a65329d SC |
769 | { |
770 | if (addr < pinfo->bank_virtual) | |
771 | return addr; | |
772 | ||
773 | /* Map the address to the memory bank. */ | |
774 | addr -= pinfo->bank_virtual; | |
775 | addr &= pinfo->bank_mask; | |
776 | addr += pinfo->bank_physical; | |
777 | return addr; | |
778 | } | |
779 | ||
780 | /* Return the page number corresponding to an address in banked memory. */ | |
781 | bfd_vma | |
0a6a3ebe | 782 | m68hc11_phys_page (struct m68hc11_page_info *pinfo, bfd_vma addr) |
3a65329d SC |
783 | { |
784 | if (addr < pinfo->bank_virtual) | |
785 | return 0; | |
786 | ||
787 | /* Map the address to the memory bank. */ | |
788 | addr -= pinfo->bank_virtual; | |
789 | addr >>= pinfo->bank_shift; | |
790 | addr &= 0x0ff; | |
791 | return addr; | |
792 | } | |
793 | ||
794 | /* This function is used for relocs which are only used for relaxing, | |
795 | which the linker should otherwise ignore. */ | |
796 | ||
797 | bfd_reloc_status_type | |
0a6a3ebe SC |
798 | m68hc11_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
799 | arelent *reloc_entry, | |
800 | asymbol *symbol ATTRIBUTE_UNUSED, | |
801 | void *data ATTRIBUTE_UNUSED, | |
802 | asection *input_section, | |
803 | bfd *output_bfd, | |
804 | char **error_message ATTRIBUTE_UNUSED) | |
3a65329d SC |
805 | { |
806 | if (output_bfd != NULL) | |
807 | reloc_entry->address += input_section->output_offset; | |
808 | return bfd_reloc_ok; | |
809 | } | |
810 | ||
811 | bfd_reloc_status_type | |
0a6a3ebe SC |
812 | m68hc11_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
813 | arelent *reloc_entry, | |
814 | asymbol *symbol, | |
815 | void *data ATTRIBUTE_UNUSED, | |
816 | asection *input_section, | |
817 | bfd *output_bfd, | |
818 | char **error_message ATTRIBUTE_UNUSED) | |
3a65329d SC |
819 | { |
820 | if (output_bfd != (bfd *) NULL | |
821 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
822 | && (! reloc_entry->howto->partial_inplace | |
823 | || reloc_entry->addend == 0)) | |
824 | { | |
825 | reloc_entry->address += input_section->output_offset; | |
826 | return bfd_reloc_ok; | |
827 | } | |
828 | ||
829 | if (output_bfd != NULL) | |
830 | return bfd_reloc_continue; | |
831 | ||
07515404 | 832 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
3a65329d SC |
833 | return bfd_reloc_outofrange; |
834 | ||
835 | abort(); | |
836 | } | |
837 | ||
3a65329d SC |
838 | /* Look through the relocs for a section during the first phase. |
839 | Since we don't do .gots or .plts, we just need to consider the | |
840 | virtual table relocs for gc. */ | |
841 | ||
842 | bfd_boolean | |
0a6a3ebe SC |
843 | elf32_m68hc11_check_relocs (bfd *abfd, struct bfd_link_info *info, |
844 | asection *sec, const Elf_Internal_Rela *relocs) | |
3a65329d SC |
845 | { |
846 | Elf_Internal_Shdr * symtab_hdr; | |
847 | struct elf_link_hash_entry ** sym_hashes; | |
3a65329d SC |
848 | const Elf_Internal_Rela * rel; |
849 | const Elf_Internal_Rela * rel_end; | |
850 | ||
1049f94e | 851 | if (info->relocatable) |
3a65329d SC |
852 | return TRUE; |
853 | ||
854 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
855 | sym_hashes = elf_sym_hashes (abfd); | |
3a65329d SC |
856 | rel_end = relocs + sec->reloc_count; |
857 | ||
858 | for (rel = relocs; rel < rel_end; rel++) | |
859 | { | |
860 | struct elf_link_hash_entry * h; | |
861 | unsigned long r_symndx; | |
862 | ||
863 | r_symndx = ELF32_R_SYM (rel->r_info); | |
864 | ||
865 | if (r_symndx < symtab_hdr->sh_info) | |
866 | h = NULL; | |
867 | else | |
973a3492 L |
868 | { |
869 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
870 | while (h->root.type == bfd_link_hash_indirect | |
871 | || h->root.type == bfd_link_hash_warning) | |
872 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
81fbe831 AM |
873 | |
874 | /* PR15323, ref flags aren't set for references in the same | |
875 | object. */ | |
876 | h->root.non_ir_ref = 1; | |
973a3492 | 877 | } |
3a65329d SC |
878 | |
879 | switch (ELF32_R_TYPE (rel->r_info)) | |
880 | { | |
881 | /* This relocation describes the C++ object vtable hierarchy. | |
882 | Reconstruct it for later use during GC. */ | |
883 | case R_M68HC11_GNU_VTINHERIT: | |
c152c796 | 884 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
3a65329d SC |
885 | return FALSE; |
886 | break; | |
887 | ||
888 | /* This relocation describes which C++ vtable entries are actually | |
889 | used. Record for later use during GC. */ | |
890 | case R_M68HC11_GNU_VTENTRY: | |
d17e0c6e JB |
891 | BFD_ASSERT (h != NULL); |
892 | if (h != NULL | |
893 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
3a65329d SC |
894 | return FALSE; |
895 | break; | |
896 | } | |
897 | } | |
898 | ||
899 | return TRUE; | |
900 | } | |
901 | ||
3a65329d SC |
902 | /* Relocate a 68hc11/68hc12 ELF section. */ |
903 | bfd_boolean | |
0a6a3ebe SC |
904 | elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
905 | struct bfd_link_info *info, | |
906 | bfd *input_bfd, asection *input_section, | |
907 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
908 | Elf_Internal_Sym *local_syms, | |
909 | asection **local_sections) | |
3a65329d SC |
910 | { |
911 | Elf_Internal_Shdr *symtab_hdr; | |
912 | struct elf_link_hash_entry **sym_hashes; | |
913 | Elf_Internal_Rela *rel, *relend; | |
9b69b847 | 914 | const char *name = NULL; |
3a65329d | 915 | struct m68hc11_page_info *pinfo; |
9c5bfbb7 | 916 | const struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd); |
4dfe6ac6 | 917 | struct m68hc11_elf_link_hash_table *htab; |
9a92d0ce | 918 | unsigned long e_flags; |
3a65329d SC |
919 | |
920 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
921 | sym_hashes = elf_sym_hashes (input_bfd); | |
9a92d0ce | 922 | e_flags = elf_elfheader (input_bfd)->e_flags; |
3a65329d | 923 | |
4dfe6ac6 NC |
924 | htab = m68hc11_elf_hash_table (info); |
925 | if (htab == NULL) | |
926 | return FALSE; | |
927 | ||
3a65329d SC |
928 | /* Get memory bank parameters. */ |
929 | m68hc11_elf_get_bank_parameters (info); | |
3a65329d | 930 | |
4dfe6ac6 | 931 | pinfo = & htab->pinfo; |
3a65329d SC |
932 | rel = relocs; |
933 | relend = relocs + input_section->reloc_count; | |
4dfe6ac6 | 934 | |
3a65329d SC |
935 | for (; rel < relend; rel++) |
936 | { | |
937 | int r_type; | |
938 | arelent arel; | |
939 | reloc_howto_type *howto; | |
940 | unsigned long r_symndx; | |
941 | Elf_Internal_Sym *sym; | |
942 | asection *sec; | |
9b69b847 | 943 | bfd_vma relocation = 0; |
3a65329d SC |
944 | bfd_reloc_status_type r = bfd_reloc_undefined; |
945 | bfd_vma phys_page; | |
946 | bfd_vma phys_addr; | |
947 | bfd_vma insn_addr; | |
948 | bfd_vma insn_page; | |
9b69b847 | 949 | bfd_boolean is_far = FALSE; |
082d1122 NC |
950 | bfd_boolean is_xgate_symbol = FALSE; |
951 | bfd_boolean is_section_symbol = FALSE; | |
ab96bf03 | 952 | struct elf_link_hash_entry *h; |
6927f982 | 953 | bfd_vma val; |
3a65329d SC |
954 | |
955 | r_symndx = ELF32_R_SYM (rel->r_info); | |
956 | r_type = ELF32_R_TYPE (rel->r_info); | |
957 | ||
958 | if (r_type == R_M68HC11_GNU_VTENTRY | |
082d1122 | 959 | || r_type == R_M68HC11_GNU_VTINHERIT) |
3a65329d SC |
960 | continue; |
961 | ||
ab96bf03 AM |
962 | (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel); |
963 | howto = arel.howto; | |
964 | ||
965 | h = NULL; | |
966 | sym = NULL; | |
967 | sec = NULL; | |
968 | if (r_symndx < symtab_hdr->sh_info) | |
969 | { | |
970 | sym = local_syms + r_symndx; | |
971 | sec = local_sections[r_symndx]; | |
972 | relocation = (sec->output_section->vma | |
973 | + sec->output_offset | |
974 | + sym->st_value); | |
975 | is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); | |
082d1122 NC |
976 | is_xgate_symbol = (sym && (sym->st_target_internal)); |
977 | is_section_symbol = ELF_ST_TYPE (sym->st_info) & STT_SECTION; | |
ab96bf03 AM |
978 | } |
979 | else | |
980 | { | |
62d887d4 | 981 | bfd_boolean unresolved_reloc, warned, ignored; |
ab96bf03 AM |
982 | |
983 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
984 | r_symndx, symtab_hdr, sym_hashes, | |
985 | h, sec, relocation, unresolved_reloc, | |
62d887d4 | 986 | warned, ignored); |
ab96bf03 AM |
987 | |
988 | is_far = (h && (h->other & STO_M68HC12_FAR)); | |
082d1122 | 989 | is_xgate_symbol = (h && (h->target_internal)); |
ab96bf03 AM |
990 | } |
991 | ||
dbaa2011 | 992 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 993 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 994 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 995 | |
1049f94e | 996 | if (info->relocatable) |
3a65329d | 997 | { |
1049f94e | 998 | /* This is a relocatable link. We don't have to change |
3a65329d SC |
999 | anything, unless the reloc is against a section symbol, |
1000 | in which case we have to adjust according to where the | |
1001 | section symbol winds up in the output section. */ | |
ab96bf03 AM |
1002 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
1003 | rel->r_addend += sec->output_offset; | |
3a65329d SC |
1004 | continue; |
1005 | } | |
3a65329d | 1006 | |
ab96bf03 AM |
1007 | if (h != NULL) |
1008 | name = h->root.root.string; | |
1009 | else | |
1010 | { | |
1011 | name = (bfd_elf_string_from_elf_section | |
1012 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
1013 | if (name == NULL || *name == '\0') | |
1014 | name = bfd_section_name (input_bfd, sec); | |
1015 | } | |
1016 | ||
1017 | if (is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16) | |
1018 | { | |
1019 | struct elf32_m68hc11_stub_hash_entry* stub; | |
ab96bf03 | 1020 | |
ab96bf03 AM |
1021 | stub = m68hc12_stub_hash_lookup (htab->stub_hash_table, |
1022 | name, FALSE, FALSE); | |
1023 | if (stub) | |
1024 | { | |
1025 | relocation = stub->stub_offset | |
1026 | + stub->stub_sec->output_section->vma | |
1027 | + stub->stub_sec->output_offset; | |
1028 | is_far = FALSE; | |
1029 | } | |
1030 | } | |
3a65329d SC |
1031 | |
1032 | /* Do the memory bank mapping. */ | |
1033 | phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend); | |
1034 | phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend); | |
1035 | switch (r_type) | |
1036 | { | |
6927f982 NC |
1037 | case R_M68HC12_LO8XG: |
1038 | /* This relocation is specific to XGATE IMM16 calls and will precede | |
1039 | a HI8. tc-m68hc11 only generates them in pairs. | |
1040 | Leave the relocation to the HI8XG step. */ | |
1041 | r = bfd_reloc_ok; | |
1042 | r_type = R_M68HC11_NONE; | |
1043 | break; | |
1044 | ||
1045 | case R_M68HC12_HI8XG: | |
1046 | /* This relocation is specific to XGATE IMM16 calls and must follow | |
1047 | a LO8XG. Does not actually check that it was a LO8XG. | |
1048 | Adjusts high and low bytes. */ | |
1049 | relocation = phys_addr; | |
9a92d0ce | 1050 | if ((e_flags & E_M68HC11_XGATE_RAMOFFSET) |
6927f982 NC |
1051 | && (relocation >= 0x2000)) |
1052 | relocation += 0xc000; /* HARDCODED RAM offset for XGATE. */ | |
1053 | ||
1054 | /* Fetch 16 bit value including low byte in previous insn. */ | |
1055 | val = (bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset) << 8) | |
1056 | | bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset - 2); | |
1057 | ||
1058 | /* Add on value to preserve carry, then write zero to high byte. */ | |
1059 | relocation += val; | |
1060 | ||
1061 | /* Write out top byte. */ | |
1062 | bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, | |
1063 | (bfd_byte*) contents + rel->r_offset); | |
1064 | ||
1065 | /* Write out low byte to previous instruction. */ | |
1066 | bfd_put_8 (input_bfd, relocation & 0xff, | |
1067 | (bfd_byte*) contents + rel->r_offset - 2); | |
1068 | ||
1069 | /* Mark as relocation completed. */ | |
1070 | r = bfd_reloc_ok; | |
1071 | r_type = R_M68HC11_NONE; | |
1072 | break; | |
1073 | ||
1074 | /* The HI8 and LO8 relocs are generated by %hi(expr) %lo(expr) | |
1075 | assembler directives. %hi does not support carry. */ | |
1076 | case R_M68HC11_HI8: | |
1077 | case R_M68HC11_LO8: | |
1078 | relocation = phys_addr; | |
1079 | break; | |
1080 | ||
3a65329d SC |
1081 | case R_M68HC11_24: |
1082 | /* Reloc used by 68HC12 call instruction. */ | |
1083 | bfd_put_16 (input_bfd, phys_addr, | |
1084 | (bfd_byte*) contents + rel->r_offset); | |
1085 | bfd_put_8 (input_bfd, phys_page, | |
1086 | (bfd_byte*) contents + rel->r_offset + 2); | |
1087 | r = bfd_reloc_ok; | |
1088 | r_type = R_M68HC11_NONE; | |
1089 | break; | |
1090 | ||
1091 | case R_M68HC11_NONE: | |
1092 | r = bfd_reloc_ok; | |
1093 | break; | |
1094 | ||
1095 | case R_M68HC11_LO16: | |
1096 | /* Reloc generated by %addr(expr) gas to obtain the | |
1097 | address as mapped in the memory bank window. */ | |
1098 | relocation = phys_addr; | |
1099 | break; | |
1100 | ||
1101 | case R_M68HC11_PAGE: | |
1102 | /* Reloc generated by %page(expr) gas to obtain the | |
1103 | page number associated with the address. */ | |
1104 | relocation = phys_page; | |
1105 | break; | |
1106 | ||
1107 | case R_M68HC11_16: | |
1108 | /* Get virtual address of instruction having the relocation. */ | |
1109 | if (is_far) | |
1110 | { | |
1111 | const char* msg; | |
1112 | char* buf; | |
1113 | msg = _("Reference to the far symbol `%s' using a wrong " | |
1114 | "relocation may result in incorrect execution"); | |
1115 | buf = alloca (strlen (msg) + strlen (name) + 10); | |
1116 | sprintf (buf, msg, name); | |
68ffbac6 | 1117 | |
3a65329d SC |
1118 | (* info->callbacks->warning) |
1119 | (info, buf, name, input_bfd, NULL, rel->r_offset); | |
1120 | } | |
1121 | ||
1122 | /* Get virtual address of instruction having the relocation. */ | |
1123 | insn_addr = input_section->output_section->vma | |
1124 | + input_section->output_offset | |
1125 | + rel->r_offset; | |
1126 | ||
1127 | insn_page = m68hc11_phys_page (pinfo, insn_addr); | |
1128 | ||
082d1122 NC |
1129 | /* If we are linking an S12 instruction against an XGATE symbol, we |
1130 | need to change the offset of the symbol value so that it's correct | |
1131 | from the S12's perspective. */ | |
1132 | if (is_xgate_symbol) | |
1133 | { | |
1134 | /* The ram in the global space is mapped to 0x2000 in the 16-bit | |
1135 | address space for S12 and 0xE000 in the 16-bit address space | |
1136 | for XGATE. */ | |
1137 | if (relocation >= 0xE000) | |
1138 | { | |
1139 | /* We offset the address by the difference | |
1140 | between these two mappings. */ | |
1141 | relocation -= 0xC000; | |
1142 | break; | |
1143 | } | |
1144 | else | |
1145 | { | |
1146 | const char * msg; | |
1147 | char * buf; | |
1148 | ||
1149 | msg = _("XGATE address (%lx) is not within shared RAM" | |
1150 | "(0xE000-0xFFFF), therefore you must manually offset " | |
1151 | "the address, and possibly manage the page, in your " | |
1152 | "code."); | |
1153 | buf = alloca (strlen (msg) + 128); | |
1154 | sprintf (buf, msg, phys_addr); | |
1155 | if (!((*info->callbacks->warning) (info, buf, name, input_bfd, | |
1156 | input_section, insn_addr))) | |
1157 | return FALSE; | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | ||
3a65329d SC |
1162 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend) |
1163 | && m68hc11_addr_is_banked (pinfo, insn_addr) | |
9a92d0ce | 1164 | && phys_page != insn_page && !(e_flags & E_M68HC11_NO_BANK_WARNING)) |
3a65329d | 1165 | { |
082d1122 NC |
1166 | const char * msg; |
1167 | char * buf; | |
3a65329d SC |
1168 | |
1169 | msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank " | |
1170 | "as current banked address [%lx:%04lx] (%lx)"); | |
1171 | ||
1172 | buf = alloca (strlen (msg) + 128); | |
1173 | sprintf (buf, msg, phys_page, phys_addr, | |
1174 | (long) (relocation + rel->r_addend), | |
1175 | insn_page, m68hc11_phys_addr (pinfo, insn_addr), | |
1176 | (long) (insn_addr)); | |
1177 | if (!((*info->callbacks->warning) | |
1178 | (info, buf, name, input_bfd, input_section, | |
1179 | rel->r_offset))) | |
1180 | return FALSE; | |
1181 | break; | |
1182 | } | |
082d1122 | 1183 | |
3a65329d SC |
1184 | if (phys_page != 0 && insn_page == 0) |
1185 | { | |
082d1122 NC |
1186 | const char * msg; |
1187 | char * buf; | |
3a65329d SC |
1188 | |
1189 | msg = _("reference to a banked address [%lx:%04lx] in the " | |
1190 | "normal address space at %04lx"); | |
1191 | ||
1192 | buf = alloca (strlen (msg) + 128); | |
1193 | sprintf (buf, msg, phys_page, phys_addr, insn_addr); | |
1194 | if (!((*info->callbacks->warning) | |
1195 | (info, buf, name, input_bfd, input_section, | |
1196 | insn_addr))) | |
1197 | return FALSE; | |
1198 | ||
1199 | relocation = phys_addr; | |
1200 | break; | |
1201 | } | |
1202 | ||
1203 | /* If this is a banked address use the phys_addr so that | |
1204 | we stay in the banked window. */ | |
1205 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)) | |
1206 | relocation = phys_addr; | |
1207 | break; | |
1208 | } | |
6927f982 | 1209 | |
082d1122 NC |
1210 | /* If we are linking an XGATE instruction against an S12 symbol, we |
1211 | need to change the offset of the symbol value so that it's correct | |
1212 | from the XGATE's perspective. */ | |
1213 | if (!strcmp (howto->name, "R_XGATE_IMM8_LO") | |
1214 | || !strcmp (howto->name, "R_XGATE_IMM8_HI")) | |
1215 | { | |
1216 | /* We can only offset S12 addresses that lie within the non-paged | |
1217 | area of RAM. */ | |
1218 | if (!is_xgate_symbol && !is_section_symbol) | |
1219 | { | |
1220 | /* The ram in the global space is mapped to 0x2000 and stops at | |
1221 | 0x4000 in the 16-bit address space for S12 and 0xE000 in the | |
1222 | 16-bit address space for XGATE. */ | |
1223 | if (relocation >= 0x2000 && relocation < 0x4000) | |
1224 | /* We offset the address by the difference | |
1225 | between these two mappings. */ | |
1226 | relocation += 0xC000; | |
1227 | else | |
1228 | { | |
1229 | const char * msg; | |
1230 | char * buf; | |
1231 | ||
1232 | /* Get virtual address of instruction having the relocation. */ | |
1233 | insn_addr = input_section->output_section->vma | |
1234 | + input_section->output_offset + rel->r_offset; | |
1235 | ||
1236 | msg = _("S12 address (%lx) is not within shared RAM" | |
1237 | "(0x2000-0x4000), therefore you must manually " | |
1238 | "offset the address in your code"); | |
1239 | buf = alloca (strlen (msg) + 128); | |
1240 | sprintf (buf, msg, phys_addr); | |
1241 | if (!((*info->callbacks->warning) (info, buf, name, input_bfd, | |
1242 | input_section, insn_addr))) | |
1243 | return FALSE; | |
1244 | break; | |
1245 | } | |
1246 | } | |
1247 | } | |
1248 | ||
3a65329d | 1249 | if (r_type != R_M68HC11_NONE) |
6927f982 NC |
1250 | { |
1251 | if ((r_type == R_M68HC12_PCREL_9) || (r_type == R_M68HC12_PCREL_10)) | |
1252 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3a65329d | 1253 | contents, rel->r_offset, |
6927f982 NC |
1254 | relocation - 2, rel->r_addend); |
1255 | else | |
1256 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1257 | contents, rel->r_offset, | |
1258 | relocation, rel->r_addend); | |
1259 | } | |
3a65329d SC |
1260 | |
1261 | if (r != bfd_reloc_ok) | |
1262 | { | |
1263 | const char * msg = (const char *) 0; | |
1264 | ||
1265 | switch (r) | |
1266 | { | |
1267 | case bfd_reloc_overflow: | |
1268 | if (!((*info->callbacks->reloc_overflow) | |
dfeffb9f | 1269 | (info, NULL, name, howto->name, (bfd_vma) 0, |
3a65329d SC |
1270 | input_bfd, input_section, rel->r_offset))) |
1271 | return FALSE; | |
1272 | break; | |
1273 | ||
1274 | case bfd_reloc_undefined: | |
1275 | if (!((*info->callbacks->undefined_symbol) | |
1276 | (info, name, input_bfd, input_section, | |
1277 | rel->r_offset, TRUE))) | |
1278 | return FALSE; | |
1279 | break; | |
1280 | ||
1281 | case bfd_reloc_outofrange: | |
1282 | msg = _ ("internal error: out of range error"); | |
1283 | goto common_error; | |
1284 | ||
1285 | case bfd_reloc_notsupported: | |
1286 | msg = _ ("internal error: unsupported relocation error"); | |
1287 | goto common_error; | |
1288 | ||
1289 | case bfd_reloc_dangerous: | |
1290 | msg = _ ("internal error: dangerous error"); | |
1291 | goto common_error; | |
1292 | ||
1293 | default: | |
1294 | msg = _ ("internal error: unknown error"); | |
1295 | /* fall through */ | |
1296 | ||
1297 | common_error: | |
1298 | if (!((*info->callbacks->warning) | |
1299 | (info, msg, name, input_bfd, input_section, | |
1300 | rel->r_offset))) | |
1301 | return FALSE; | |
1302 | break; | |
1303 | } | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | return TRUE; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | \f | |
1312 | /* Set and control ELF flags in ELF header. */ | |
1313 | ||
1314 | bfd_boolean | |
0a6a3ebe | 1315 | _bfd_m68hc11_elf_set_private_flags (bfd *abfd, flagword flags) |
3a65329d SC |
1316 | { |
1317 | BFD_ASSERT (!elf_flags_init (abfd) | |
1318 | || elf_elfheader (abfd)->e_flags == flags); | |
1319 | ||
1320 | elf_elfheader (abfd)->e_flags = flags; | |
1321 | elf_flags_init (abfd) = TRUE; | |
1322 | return TRUE; | |
1323 | } | |
1324 | ||
1325 | /* Merge backend specific data from an object file to the output | |
1326 | object file when linking. */ | |
1327 | ||
1328 | bfd_boolean | |
0a6a3ebe | 1329 | _bfd_m68hc11_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
3a65329d SC |
1330 | { |
1331 | flagword old_flags; | |
1332 | flagword new_flags; | |
1333 | bfd_boolean ok = TRUE; | |
1334 | ||
cc643b88 | 1335 | /* Check if we have the same endianness */ |
3a65329d SC |
1336 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) |
1337 | return FALSE; | |
1338 | ||
1339 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1340 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1341 | return TRUE; | |
1342 | ||
1343 | new_flags = elf_elfheader (ibfd)->e_flags; | |
1344 | elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI; | |
1345 | old_flags = elf_elfheader (obfd)->e_flags; | |
1346 | ||
1347 | if (! elf_flags_init (obfd)) | |
1348 | { | |
1349 | elf_flags_init (obfd) = TRUE; | |
1350 | elf_elfheader (obfd)->e_flags = new_flags; | |
1351 | elf_elfheader (obfd)->e_ident[EI_CLASS] | |
1352 | = elf_elfheader (ibfd)->e_ident[EI_CLASS]; | |
1353 | ||
1354 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
1355 | && bfd_get_arch_info (obfd)->the_default) | |
1356 | { | |
1357 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
1358 | bfd_get_mach (ibfd))) | |
1359 | return FALSE; | |
1360 | } | |
1361 | ||
1362 | return TRUE; | |
1363 | } | |
1364 | ||
1365 | /* Check ABI compatibility. */ | |
1366 | if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) | |
1367 | { | |
1368 | (*_bfd_error_handler) | |
d003868e AM |
1369 | (_("%B: linking files compiled for 16-bit integers (-mshort) " |
1370 | "and others for 32-bit integers"), ibfd); | |
3a65329d SC |
1371 | ok = FALSE; |
1372 | } | |
1373 | if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) | |
1374 | { | |
1375 | (*_bfd_error_handler) | |
d003868e AM |
1376 | (_("%B: linking files compiled for 32-bit double (-fshort-double) " |
1377 | "and others for 64-bit double"), ibfd); | |
3a65329d SC |
1378 | ok = FALSE; |
1379 | } | |
47247ced SC |
1380 | |
1381 | /* Processor compatibility. */ | |
1382 | if (!EF_M68HC11_CAN_MERGE_MACH (new_flags, old_flags)) | |
1383 | { | |
1384 | (*_bfd_error_handler) | |
d003868e AM |
1385 | (_("%B: linking files compiled for HCS12 with " |
1386 | "others compiled for HC12"), ibfd); | |
47247ced SC |
1387 | ok = FALSE; |
1388 | } | |
1389 | new_flags = ((new_flags & ~EF_M68HC11_MACH_MASK) | |
1390 | | (EF_M68HC11_MERGE_MACH (new_flags, old_flags))); | |
1391 | ||
1392 | elf_elfheader (obfd)->e_flags = new_flags; | |
1393 | ||
17e58af0 SC |
1394 | new_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); |
1395 | old_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); | |
3a65329d SC |
1396 | |
1397 | /* Warn about any other mismatches */ | |
1398 | if (new_flags != old_flags) | |
1399 | { | |
1400 | (*_bfd_error_handler) | |
d003868e AM |
1401 | (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
1402 | ibfd, (unsigned long) new_flags, (unsigned long) old_flags); | |
3a65329d SC |
1403 | ok = FALSE; |
1404 | } | |
1405 | ||
1406 | if (! ok) | |
1407 | { | |
1408 | bfd_set_error (bfd_error_bad_value); | |
1409 | return FALSE; | |
1410 | } | |
1411 | ||
1412 | return TRUE; | |
1413 | } | |
1414 | ||
1415 | bfd_boolean | |
0a6a3ebe | 1416 | _bfd_m68hc11_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
3a65329d SC |
1417 | { |
1418 | FILE *file = (FILE *) ptr; | |
1419 | ||
1420 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
1421 | ||
1422 | /* Print normal ELF private data. */ | |
1423 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
1424 | ||
1425 | /* xgettext:c-format */ | |
1426 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
1427 | ||
1428 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) | |
1429 | fprintf (file, _("[abi=32-bit int, ")); | |
1430 | else | |
1431 | fprintf (file, _("[abi=16-bit int, ")); | |
1432 | ||
1433 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) | |
1434 | fprintf (file, _("64-bit double, ")); | |
1435 | else | |
1436 | fprintf (file, _("32-bit double, ")); | |
1437 | ||
1438 | if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0) | |
1439 | fprintf (file, _("cpu=HC11]")); | |
1440 | else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH) | |
1441 | fprintf (file, _("cpu=HCS12]")); | |
1442 | else | |
68ffbac6 | 1443 | fprintf (file, _("cpu=HC12]")); |
3a65329d SC |
1444 | |
1445 | if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS) | |
1446 | fprintf (file, _(" [memory=bank-model]")); | |
1447 | else | |
1448 | fprintf (file, _(" [memory=flat]")); | |
1449 | ||
6927f982 NC |
1450 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_XGATE_RAMOFFSET) |
1451 | fprintf (file, _(" [XGATE RAM offsetting]")); | |
1452 | ||
3a65329d SC |
1453 | fputc ('\n', file); |
1454 | ||
1455 | return TRUE; | |
1456 | } | |
1457 | ||
0a6a3ebe SC |
1458 | static void scan_sections_for_abi (bfd *abfd ATTRIBUTE_UNUSED, |
1459 | asection *asect, void *arg) | |
3a65329d SC |
1460 | { |
1461 | struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg; | |
1462 | ||
1463 | if (asect->vma >= p->pinfo->bank_virtual) | |
1464 | p->use_memory_banks = TRUE; | |
1465 | } | |
68ffbac6 | 1466 | |
3a65329d SC |
1467 | /* Tweak the OSABI field of the elf header. */ |
1468 | ||
1469 | void | |
0a6a3ebe | 1470 | elf32_m68hc11_post_process_headers (bfd *abfd, struct bfd_link_info *link_info) |
3a65329d SC |
1471 | { |
1472 | struct m68hc11_scan_param param; | |
4dfe6ac6 NC |
1473 | struct m68hc11_elf_link_hash_table *htab; |
1474 | ||
1475 | if (link_info == NULL) | |
1476 | return; | |
3a65329d | 1477 | |
4dfe6ac6 NC |
1478 | htab = m68hc11_elf_hash_table (link_info); |
1479 | if (htab == NULL) | |
3a65329d SC |
1480 | return; |
1481 | ||
1482 | m68hc11_elf_get_bank_parameters (link_info); | |
1483 | ||
1484 | param.use_memory_banks = FALSE; | |
4dfe6ac6 NC |
1485 | param.pinfo = & htab->pinfo; |
1486 | ||
3a65329d | 1487 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); |
4dfe6ac6 | 1488 | |
3a65329d SC |
1489 | if (param.use_memory_banks) |
1490 | { | |
1491 | Elf_Internal_Ehdr * i_ehdrp; | |
1492 | ||
1493 | i_ehdrp = elf_elfheader (abfd); | |
1494 | i_ehdrp->e_flags |= E_M68HC12_BANKS; | |
1495 | } | |
1496 | } |