Commit | Line | Data |
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3a65329d | 1 | /* Motorola 68HC11/HC12-specific support for 32-bit ELF |
8d25cc3d | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
5efbbc43 | 3 | 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
3a65329d SC |
4 | Contributed by Stephane Carrez (stcarrez@nerim.fr) |
5 | ||
cd123cb7 NC |
6 | This file is part of BFD, the Binary File Descriptor library. |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
3a65329d | 22 | |
3a65329d | 23 | #include "sysdep.h" |
df7b86aa | 24 | #include "alloca-conf.h" |
3db64b00 | 25 | #include "bfd.h" |
3a65329d SC |
26 | #include "bfdlink.h" |
27 | #include "libbfd.h" | |
28 | #include "elf-bfd.h" | |
29 | #include "elf32-m68hc1x.h" | |
30 | #include "elf/m68hc11.h" | |
31 | #include "opcode/m68hc11.h" | |
32 | ||
33 | ||
34 | #define m68hc12_stub_hash_lookup(table, string, create, copy) \ | |
35 | ((struct elf32_m68hc11_stub_hash_entry *) \ | |
36 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
37 | ||
38 | static struct elf32_m68hc11_stub_hash_entry* m68hc12_add_stub | |
0a6a3ebe SC |
39 | (const char *stub_name, |
40 | asection *section, | |
41 | struct m68hc11_elf_link_hash_table *htab); | |
3a65329d SC |
42 | |
43 | static struct bfd_hash_entry *stub_hash_newfunc | |
0a6a3ebe | 44 | (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); |
3a65329d | 45 | |
0a6a3ebe SC |
46 | static void m68hc11_elf_set_symbol (bfd* abfd, struct bfd_link_info *info, |
47 | const char* name, bfd_vma value, | |
48 | asection* sec); | |
3a65329d SC |
49 | |
50 | static bfd_boolean m68hc11_elf_export_one_stub | |
0a6a3ebe | 51 | (struct bfd_hash_entry *gen_entry, void *in_arg); |
3a65329d | 52 | |
2c3fc389 | 53 | static void scan_sections_for_abi (bfd*, asection*, void *); |
3a65329d SC |
54 | |
55 | struct m68hc11_scan_param | |
56 | { | |
57 | struct m68hc11_page_info* pinfo; | |
58 | bfd_boolean use_memory_banks; | |
59 | }; | |
60 | ||
61 | ||
62 | /* Create a 68HC11/68HC12 ELF linker hash table. */ | |
63 | ||
64 | struct m68hc11_elf_link_hash_table* | |
0a6a3ebe | 65 | m68hc11_elf_hash_table_create (bfd *abfd) |
3a65329d SC |
66 | { |
67 | struct m68hc11_elf_link_hash_table *ret; | |
68 | bfd_size_type amt = sizeof (struct m68hc11_elf_link_hash_table); | |
69 | ||
7bf52ea2 | 70 | ret = (struct m68hc11_elf_link_hash_table *) bfd_zmalloc (amt); |
3a65329d SC |
71 | if (ret == (struct m68hc11_elf_link_hash_table *) NULL) |
72 | return NULL; | |
73 | ||
66eb6687 AM |
74 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
75 | _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
76 | sizeof (struct elf_link_hash_entry), |
77 | M68HC11_ELF_DATA)) | |
3a65329d | 78 | { |
47247ced | 79 | free (ret); |
3a65329d SC |
80 | return NULL; |
81 | } | |
82 | ||
83 | /* Init the stub hash table too. */ | |
84 | amt = sizeof (struct bfd_hash_table); | |
85 | ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt); | |
86 | if (ret->stub_hash_table == NULL) | |
87 | { | |
47247ced | 88 | free (ret); |
3a65329d SC |
89 | return NULL; |
90 | } | |
66eb6687 AM |
91 | if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc, |
92 | sizeof (struct elf32_m68hc11_stub_hash_entry))) | |
3a65329d SC |
93 | return NULL; |
94 | ||
3a65329d SC |
95 | return ret; |
96 | } | |
97 | ||
98 | /* Free the derived linker hash table. */ | |
99 | ||
100 | void | |
0a6a3ebe | 101 | m68hc11_elf_bfd_link_hash_table_free (struct bfd_link_hash_table *hash) |
3a65329d SC |
102 | { |
103 | struct m68hc11_elf_link_hash_table *ret | |
104 | = (struct m68hc11_elf_link_hash_table *) hash; | |
105 | ||
106 | bfd_hash_table_free (ret->stub_hash_table); | |
107 | free (ret->stub_hash_table); | |
9f7c3e5e | 108 | _bfd_elf_link_hash_table_free (hash); |
3a65329d SC |
109 | } |
110 | ||
111 | /* Assorted hash table functions. */ | |
112 | ||
113 | /* Initialize an entry in the stub hash table. */ | |
114 | ||
115 | static struct bfd_hash_entry * | |
0a6a3ebe SC |
116 | stub_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
117 | const char *string) | |
3a65329d SC |
118 | { |
119 | /* Allocate the structure if it has not already been allocated by a | |
120 | subclass. */ | |
121 | if (entry == NULL) | |
122 | { | |
123 | entry = bfd_hash_allocate (table, | |
124 | sizeof (struct elf32_m68hc11_stub_hash_entry)); | |
125 | if (entry == NULL) | |
126 | return entry; | |
127 | } | |
128 | ||
129 | /* Call the allocation method of the superclass. */ | |
130 | entry = bfd_hash_newfunc (entry, table, string); | |
131 | if (entry != NULL) | |
132 | { | |
133 | struct elf32_m68hc11_stub_hash_entry *eh; | |
134 | ||
135 | /* Initialize the local fields. */ | |
136 | eh = (struct elf32_m68hc11_stub_hash_entry *) entry; | |
137 | eh->stub_sec = NULL; | |
138 | eh->stub_offset = 0; | |
139 | eh->target_value = 0; | |
140 | eh->target_section = NULL; | |
141 | } | |
142 | ||
143 | return entry; | |
144 | } | |
145 | ||
146 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
147 | stub entry are initialised. */ | |
148 | ||
149 | static struct elf32_m68hc11_stub_hash_entry * | |
0a6a3ebe SC |
150 | m68hc12_add_stub (const char *stub_name, asection *section, |
151 | struct m68hc11_elf_link_hash_table *htab) | |
3a65329d SC |
152 | { |
153 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
154 | ||
155 | /* Enter this entry into the linker stub hash table. */ | |
156 | stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name, | |
157 | TRUE, FALSE); | |
158 | if (stub_entry == NULL) | |
159 | { | |
d003868e AM |
160 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), |
161 | section->owner, stub_name); | |
3a65329d SC |
162 | return NULL; |
163 | } | |
164 | ||
165 | if (htab->stub_section == 0) | |
166 | { | |
167 | htab->stub_section = (*htab->add_stub_section) (".tramp", | |
168 | htab->tramp_section); | |
169 | } | |
170 | ||
171 | stub_entry->stub_sec = htab->stub_section; | |
172 | stub_entry->stub_offset = 0; | |
173 | return stub_entry; | |
174 | } | |
175 | ||
176 | /* Hook called by the linker routine which adds symbols from an object | |
177 | file. We use it for identify far symbols and force a loading of | |
178 | the trampoline handler. */ | |
179 | ||
180 | bfd_boolean | |
0a6a3ebe | 181 | elf32_m68hc11_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, |
555cd476 | 182 | Elf_Internal_Sym *sym, |
0a6a3ebe SC |
183 | const char **namep ATTRIBUTE_UNUSED, |
184 | flagword *flagsp ATTRIBUTE_UNUSED, | |
185 | asection **secp ATTRIBUTE_UNUSED, | |
186 | bfd_vma *valp ATTRIBUTE_UNUSED) | |
3a65329d SC |
187 | { |
188 | if (sym->st_other & STO_M68HC12_FAR) | |
189 | { | |
190 | struct elf_link_hash_entry *h; | |
191 | ||
192 | h = (struct elf_link_hash_entry *) | |
193 | bfd_link_hash_lookup (info->hash, "__far_trampoline", | |
194 | FALSE, FALSE, FALSE); | |
195 | if (h == NULL) | |
196 | { | |
197 | struct bfd_link_hash_entry* entry = NULL; | |
198 | ||
199 | _bfd_generic_link_add_one_symbol (info, abfd, | |
200 | "__far_trampoline", | |
201 | BSF_GLOBAL, | |
202 | bfd_und_section_ptr, | |
203 | (bfd_vma) 0, (const char*) NULL, | |
204 | FALSE, FALSE, &entry); | |
205 | } | |
206 | ||
207 | } | |
208 | return TRUE; | |
209 | } | |
210 | ||
5efbbc43 AM |
211 | /* Merge non-visibility st_other attributes, STO_M68HC12_FAR and |
212 | STO_M68HC12_INTERRUPT. */ | |
213 | ||
214 | void | |
215 | elf32_m68hc11_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
216 | const Elf_Internal_Sym *isym, | |
217 | bfd_boolean definition, | |
218 | bfd_boolean dynamic ATTRIBUTE_UNUSED) | |
219 | { | |
220 | if (definition) | |
221 | h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) | |
222 | | ELF_ST_VISIBILITY (h->other)); | |
223 | } | |
224 | ||
3a65329d SC |
225 | /* External entry points for sizing and building linker stubs. */ |
226 | ||
227 | /* Set up various things so that we can make a list of input sections | |
228 | for each output section included in the link. Returns -1 on error, | |
229 | 0 when no stubs will be needed, and 1 on success. */ | |
230 | ||
231 | int | |
0a6a3ebe | 232 | elf32_m68hc11_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) |
3a65329d SC |
233 | { |
234 | bfd *input_bfd; | |
235 | unsigned int bfd_count; | |
236 | int top_id, top_index; | |
237 | asection *section; | |
238 | asection **input_list, **list; | |
239 | bfd_size_type amt; | |
240 | asection *text_section; | |
241 | struct m68hc11_elf_link_hash_table *htab; | |
242 | ||
243 | htab = m68hc11_elf_hash_table (info); | |
4dfe6ac6 NC |
244 | if (htab == NULL) |
245 | return -1; | |
3a65329d | 246 | |
f13a99db | 247 | if (bfd_get_flavour (info->output_bfd) != bfd_target_elf_flavour) |
3a65329d SC |
248 | return 0; |
249 | ||
250 | /* Count the number of input BFDs and find the top input section id. | |
251 | Also search for an existing ".tramp" section so that we know | |
252 | where generated trampolines must go. Default to ".text" if we | |
253 | can't find it. */ | |
254 | htab->tramp_section = 0; | |
255 | text_section = 0; | |
256 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
257 | input_bfd != NULL; | |
258 | input_bfd = input_bfd->link_next) | |
259 | { | |
260 | bfd_count += 1; | |
261 | for (section = input_bfd->sections; | |
262 | section != NULL; | |
263 | section = section->next) | |
264 | { | |
265 | const char* name = bfd_get_section_name (input_bfd, section); | |
266 | ||
267 | if (!strcmp (name, ".tramp")) | |
268 | htab->tramp_section = section; | |
269 | ||
270 | if (!strcmp (name, ".text")) | |
271 | text_section = section; | |
272 | ||
273 | if (top_id < section->id) | |
274 | top_id = section->id; | |
275 | } | |
276 | } | |
277 | htab->bfd_count = bfd_count; | |
278 | if (htab->tramp_section == 0) | |
279 | htab->tramp_section = text_section; | |
280 | ||
281 | /* We can't use output_bfd->section_count here to find the top output | |
282 | section index as some sections may have been removed, and | |
8423293d | 283 | strip_excluded_output_sections doesn't renumber the indices. */ |
3a65329d SC |
284 | for (section = output_bfd->sections, top_index = 0; |
285 | section != NULL; | |
286 | section = section->next) | |
287 | { | |
288 | if (top_index < section->index) | |
289 | top_index = section->index; | |
290 | } | |
291 | ||
292 | htab->top_index = top_index; | |
293 | amt = sizeof (asection *) * (top_index + 1); | |
294 | input_list = (asection **) bfd_malloc (amt); | |
295 | htab->input_list = input_list; | |
296 | if (input_list == NULL) | |
297 | return -1; | |
298 | ||
299 | /* For sections we aren't interested in, mark their entries with a | |
300 | value we can check later. */ | |
301 | list = input_list + top_index; | |
302 | do | |
303 | *list = bfd_abs_section_ptr; | |
304 | while (list-- != input_list); | |
305 | ||
306 | for (section = output_bfd->sections; | |
307 | section != NULL; | |
308 | section = section->next) | |
309 | { | |
310 | if ((section->flags & SEC_CODE) != 0) | |
311 | input_list[section->index] = NULL; | |
312 | } | |
313 | ||
314 | return 1; | |
315 | } | |
316 | ||
317 | /* Determine and set the size of the stub section for a final link. | |
318 | ||
319 | The basic idea here is to examine all the relocations looking for | |
320 | PC-relative calls to a target that is unreachable with a "bl" | |
321 | instruction. */ | |
322 | ||
323 | bfd_boolean | |
0a6a3ebe SC |
324 | elf32_m68hc11_size_stubs (bfd *output_bfd, bfd *stub_bfd, |
325 | struct bfd_link_info *info, | |
326 | asection * (*add_stub_section) (const char*, asection*)) | |
3a65329d SC |
327 | { |
328 | bfd *input_bfd; | |
329 | asection *section; | |
330 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
331 | unsigned int bfd_indx, bfd_count; | |
332 | bfd_size_type amt; | |
333 | asection *stub_sec; | |
3a65329d SC |
334 | struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info); |
335 | ||
4dfe6ac6 NC |
336 | if (htab == NULL) |
337 | return FALSE; | |
338 | ||
3a65329d SC |
339 | /* Stash our params away. */ |
340 | htab->stub_bfd = stub_bfd; | |
341 | htab->add_stub_section = add_stub_section; | |
342 | ||
343 | /* Count the number of input BFDs and find the top input section id. */ | |
344 | for (input_bfd = info->input_bfds, bfd_count = 0; | |
345 | input_bfd != NULL; | |
346 | input_bfd = input_bfd->link_next) | |
4dfe6ac6 | 347 | bfd_count += 1; |
3a65329d SC |
348 | |
349 | /* We want to read in symbol extension records only once. To do this | |
350 | we need to read in the local symbols in parallel and save them for | |
351 | later use; so hold pointers to the local symbols in an array. */ | |
352 | amt = sizeof (Elf_Internal_Sym *) * bfd_count; | |
353 | all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); | |
354 | if (all_local_syms == NULL) | |
355 | return FALSE; | |
356 | ||
357 | /* Walk over all the input BFDs, swapping in local symbols. */ | |
358 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
359 | input_bfd != NULL; | |
360 | input_bfd = input_bfd->link_next, bfd_indx++) | |
361 | { | |
362 | Elf_Internal_Shdr *symtab_hdr; | |
3a65329d SC |
363 | |
364 | /* We'll need the symbol table in a second. */ | |
365 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
366 | if (symtab_hdr->sh_info == 0) | |
367 | continue; | |
368 | ||
2a0e29b4 SC |
369 | /* We need an array of the local symbols attached to the input bfd. */ |
370 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
371 | if (local_syms == NULL) | |
372 | { | |
373 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
374 | symtab_hdr->sh_info, 0, | |
375 | NULL, NULL, NULL); | |
376 | /* Cache them for elf_link_input_bfd. */ | |
377 | symtab_hdr->contents = (unsigned char *) local_syms; | |
378 | } | |
3a65329d | 379 | if (local_syms == NULL) |
3a65329d | 380 | { |
2a0e29b4 SC |
381 | free (all_local_syms); |
382 | return FALSE; | |
3a65329d SC |
383 | } |
384 | ||
2a0e29b4 | 385 | all_local_syms[bfd_indx] = local_syms; |
3a65329d SC |
386 | } |
387 | ||
388 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
389 | input_bfd != NULL; | |
390 | input_bfd = input_bfd->link_next, bfd_indx++) | |
391 | { | |
392 | Elf_Internal_Shdr *symtab_hdr; | |
3a65329d SC |
393 | struct elf_link_hash_entry ** sym_hashes; |
394 | ||
395 | sym_hashes = elf_sym_hashes (input_bfd); | |
396 | ||
397 | /* We'll need the symbol table in a second. */ | |
398 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
399 | if (symtab_hdr->sh_info == 0) | |
400 | continue; | |
401 | ||
402 | local_syms = all_local_syms[bfd_indx]; | |
403 | ||
404 | /* Walk over each section attached to the input bfd. */ | |
405 | for (section = input_bfd->sections; | |
406 | section != NULL; | |
407 | section = section->next) | |
408 | { | |
409 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
410 | ||
411 | /* If there aren't any relocs, then there's nothing more | |
412 | to do. */ | |
413 | if ((section->flags & SEC_RELOC) == 0 | |
414 | || section->reloc_count == 0) | |
415 | continue; | |
416 | ||
417 | /* If this section is a link-once section that will be | |
418 | discarded, then don't create any stubs. */ | |
419 | if (section->output_section == NULL | |
420 | || section->output_section->owner != output_bfd) | |
421 | continue; | |
422 | ||
423 | /* Get the relocs. */ | |
424 | internal_relocs | |
45d6a902 AM |
425 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
426 | (Elf_Internal_Rela *) NULL, | |
427 | info->keep_memory); | |
3a65329d SC |
428 | if (internal_relocs == NULL) |
429 | goto error_ret_free_local; | |
430 | ||
431 | /* Now examine each relocation. */ | |
432 | irela = internal_relocs; | |
433 | irelaend = irela + section->reloc_count; | |
434 | for (; irela < irelaend; irela++) | |
435 | { | |
436 | unsigned int r_type, r_indx; | |
437 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
438 | asection *sym_sec; | |
439 | bfd_vma sym_value; | |
440 | struct elf_link_hash_entry *hash; | |
441 | const char *stub_name; | |
442 | Elf_Internal_Sym *sym; | |
443 | ||
444 | r_type = ELF32_R_TYPE (irela->r_info); | |
445 | ||
446 | /* Only look at 16-bit relocs. */ | |
447 | if (r_type != (unsigned int) R_M68HC11_16) | |
448 | continue; | |
449 | ||
450 | /* Now determine the call target, its name, value, | |
451 | section. */ | |
452 | r_indx = ELF32_R_SYM (irela->r_info); | |
453 | if (r_indx < symtab_hdr->sh_info) | |
454 | { | |
455 | /* It's a local symbol. */ | |
456 | Elf_Internal_Shdr *hdr; | |
457 | bfd_boolean is_far; | |
458 | ||
459 | sym = local_syms + r_indx; | |
3a65329d SC |
460 | is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); |
461 | if (!is_far) | |
462 | continue; | |
7f888330 | 463 | |
4fbb74a6 AM |
464 | if (sym->st_shndx >= elf_numsections (input_bfd)) |
465 | sym_sec = NULL; | |
466 | else | |
467 | { | |
468 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
469 | sym_sec = hdr->bfd_section; | |
470 | } | |
3a65329d SC |
471 | stub_name = (bfd_elf_string_from_elf_section |
472 | (input_bfd, symtab_hdr->sh_link, | |
473 | sym->st_name)); | |
474 | sym_value = sym->st_value; | |
475 | hash = NULL; | |
476 | } | |
477 | else | |
478 | { | |
479 | /* It's an external symbol. */ | |
480 | int e_indx; | |
481 | ||
482 | e_indx = r_indx - symtab_hdr->sh_info; | |
483 | hash = (struct elf_link_hash_entry *) | |
484 | (sym_hashes[e_indx]); | |
485 | ||
486 | while (hash->root.type == bfd_link_hash_indirect | |
487 | || hash->root.type == bfd_link_hash_warning) | |
488 | hash = ((struct elf_link_hash_entry *) | |
489 | hash->root.u.i.link); | |
490 | ||
491 | if (hash->root.type == bfd_link_hash_defined | |
83774818 SC |
492 | || hash->root.type == bfd_link_hash_defweak |
493 | || hash->root.type == bfd_link_hash_new) | |
3a65329d SC |
494 | { |
495 | if (!(hash->other & STO_M68HC12_FAR)) | |
496 | continue; | |
497 | } | |
498 | else if (hash->root.type == bfd_link_hash_undefweak) | |
499 | { | |
500 | continue; | |
501 | } | |
502 | else if (hash->root.type == bfd_link_hash_undefined) | |
503 | { | |
504 | continue; | |
505 | } | |
506 | else | |
507 | { | |
508 | bfd_set_error (bfd_error_bad_value); | |
509 | goto error_ret_free_internal; | |
510 | } | |
511 | sym_sec = hash->root.u.def.section; | |
512 | sym_value = hash->root.u.def.value; | |
513 | stub_name = hash->root.root.string; | |
514 | } | |
515 | ||
516 | if (!stub_name) | |
517 | goto error_ret_free_internal; | |
518 | ||
519 | stub_entry = m68hc12_stub_hash_lookup | |
520 | (htab->stub_hash_table, | |
521 | stub_name, | |
522 | FALSE, FALSE); | |
523 | if (stub_entry == NULL) | |
524 | { | |
525 | if (add_stub_section == 0) | |
526 | continue; | |
527 | ||
528 | stub_entry = m68hc12_add_stub (stub_name, section, htab); | |
529 | if (stub_entry == NULL) | |
530 | { | |
531 | error_ret_free_internal: | |
532 | if (elf_section_data (section)->relocs == NULL) | |
533 | free (internal_relocs); | |
534 | goto error_ret_free_local; | |
535 | } | |
536 | } | |
537 | ||
538 | stub_entry->target_value = sym_value; | |
539 | stub_entry->target_section = sym_sec; | |
540 | } | |
541 | ||
542 | /* We're done with the internal relocs, free them. */ | |
543 | if (elf_section_data (section)->relocs == NULL) | |
544 | free (internal_relocs); | |
545 | } | |
546 | } | |
547 | ||
548 | if (add_stub_section) | |
549 | { | |
550 | /* OK, we've added some stubs. Find out the new size of the | |
551 | stub sections. */ | |
552 | for (stub_sec = htab->stub_bfd->sections; | |
553 | stub_sec != NULL; | |
554 | stub_sec = stub_sec->next) | |
555 | { | |
eea6121a | 556 | stub_sec->size = 0; |
3a65329d SC |
557 | } |
558 | ||
559 | bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab); | |
560 | } | |
2a0e29b4 | 561 | free (all_local_syms); |
3a65329d SC |
562 | return TRUE; |
563 | ||
564 | error_ret_free_local: | |
2a0e29b4 | 565 | free (all_local_syms); |
3a65329d SC |
566 | return FALSE; |
567 | } | |
568 | ||
569 | /* Export the trampoline addresses in the symbol table. */ | |
570 | static bfd_boolean | |
0a6a3ebe | 571 | m68hc11_elf_export_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
3a65329d SC |
572 | { |
573 | struct bfd_link_info *info; | |
574 | struct m68hc11_elf_link_hash_table *htab; | |
575 | struct elf32_m68hc11_stub_hash_entry *stub_entry; | |
576 | char* name; | |
577 | bfd_boolean result; | |
578 | ||
579 | info = (struct bfd_link_info *) in_arg; | |
580 | htab = m68hc11_elf_hash_table (info); | |
4dfe6ac6 NC |
581 | if (htab == NULL) |
582 | return FALSE; | |
3a65329d SC |
583 | |
584 | /* Massage our args to the form they really have. */ | |
585 | stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; | |
586 | ||
587 | /* Generate the trampoline according to HC11 or HC12. */ | |
588 | result = (* htab->build_one_stub) (gen_entry, in_arg); | |
589 | ||
590 | /* Make a printable name that does not conflict with the real function. */ | |
591 | name = alloca (strlen (stub_entry->root.string) + 16); | |
592 | sprintf (name, "tramp.%s", stub_entry->root.string); | |
593 | ||
594 | /* Export the symbol for debugging/disassembling. */ | |
595 | m68hc11_elf_set_symbol (htab->stub_bfd, info, name, | |
596 | stub_entry->stub_offset, | |
597 | stub_entry->stub_sec); | |
598 | return result; | |
599 | } | |
600 | ||
601 | /* Export a symbol or set its value and section. */ | |
602 | static void | |
0a6a3ebe SC |
603 | m68hc11_elf_set_symbol (bfd *abfd, struct bfd_link_info *info, |
604 | const char *name, bfd_vma value, asection *sec) | |
3a65329d SC |
605 | { |
606 | struct elf_link_hash_entry *h; | |
607 | ||
608 | h = (struct elf_link_hash_entry *) | |
609 | bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE); | |
610 | if (h == NULL) | |
611 | { | |
612 | _bfd_generic_link_add_one_symbol (info, abfd, | |
613 | name, | |
614 | BSF_GLOBAL, | |
615 | sec, | |
616 | value, | |
617 | (const char*) NULL, | |
618 | TRUE, FALSE, NULL); | |
619 | } | |
620 | else | |
621 | { | |
622 | h->root.type = bfd_link_hash_defined; | |
623 | h->root.u.def.value = value; | |
624 | h->root.u.def.section = sec; | |
625 | } | |
626 | } | |
627 | ||
628 | ||
629 | /* Build all the stubs associated with the current output file. The | |
630 | stubs are kept in a hash table attached to the main linker hash | |
631 | table. This function is called via m68hc12elf_finish in the | |
632 | linker. */ | |
633 | ||
634 | bfd_boolean | |
0a6a3ebe | 635 | elf32_m68hc11_build_stubs (bfd *abfd, struct bfd_link_info *info) |
3a65329d SC |
636 | { |
637 | asection *stub_sec; | |
638 | struct bfd_hash_table *table; | |
639 | struct m68hc11_elf_link_hash_table *htab; | |
640 | struct m68hc11_scan_param param; | |
641 | ||
642 | m68hc11_elf_get_bank_parameters (info); | |
643 | htab = m68hc11_elf_hash_table (info); | |
4dfe6ac6 NC |
644 | if (htab == NULL) |
645 | return FALSE; | |
3a65329d SC |
646 | |
647 | for (stub_sec = htab->stub_bfd->sections; | |
648 | stub_sec != NULL; | |
649 | stub_sec = stub_sec->next) | |
650 | { | |
651 | bfd_size_type size; | |
652 | ||
653 | /* Allocate memory to hold the linker stubs. */ | |
eea6121a | 654 | size = stub_sec->size; |
3a65329d SC |
655 | stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); |
656 | if (stub_sec->contents == NULL && size != 0) | |
657 | return FALSE; | |
eea6121a | 658 | stub_sec->size = 0; |
3a65329d SC |
659 | } |
660 | ||
661 | /* Build the stubs as directed by the stub hash table. */ | |
662 | table = htab->stub_hash_table; | |
663 | bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info); | |
68ffbac6 | 664 | |
3a65329d SC |
665 | /* Scan the output sections to see if we use the memory banks. |
666 | If so, export the symbols that define how the memory banks | |
667 | are mapped. This is used by gdb and the simulator to obtain | |
668 | the information. It can be used by programs to burn the eprom | |
669 | at the good addresses. */ | |
670 | param.use_memory_banks = FALSE; | |
671 | param.pinfo = &htab->pinfo; | |
672 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); | |
673 | if (param.use_memory_banks) | |
674 | { | |
675 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME, | |
676 | htab->pinfo.bank_physical, | |
677 | bfd_abs_section_ptr); | |
678 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
679 | htab->pinfo.bank_virtual, | |
680 | bfd_abs_section_ptr); | |
681 | m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME, | |
682 | htab->pinfo.bank_size, | |
683 | bfd_abs_section_ptr); | |
684 | } | |
685 | ||
686 | return TRUE; | |
687 | } | |
688 | ||
689 | void | |
0a6a3ebe | 690 | m68hc11_elf_get_bank_parameters (struct bfd_link_info *info) |
3a65329d SC |
691 | { |
692 | unsigned i; | |
693 | struct m68hc11_page_info *pinfo; | |
694 | struct bfd_link_hash_entry *h; | |
4dfe6ac6 NC |
695 | struct m68hc11_elf_link_hash_table *htab; |
696 | ||
697 | htab = m68hc11_elf_hash_table (info); | |
698 | if (htab == NULL) | |
699 | return; | |
3a65329d | 700 | |
4dfe6ac6 | 701 | pinfo = & htab->pinfo; |
3a65329d SC |
702 | if (pinfo->bank_param_initialized) |
703 | return; | |
704 | ||
705 | pinfo->bank_virtual = M68HC12_BANK_VIRT; | |
706 | pinfo->bank_mask = M68HC12_BANK_MASK; | |
707 | pinfo->bank_physical = M68HC12_BANK_BASE; | |
708 | pinfo->bank_shift = M68HC12_BANK_SHIFT; | |
709 | pinfo->bank_size = 1 << M68HC12_BANK_SHIFT; | |
710 | ||
711 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME, | |
712 | FALSE, FALSE, TRUE); | |
713 | if (h != (struct bfd_link_hash_entry*) NULL | |
714 | && h->type == bfd_link_hash_defined) | |
715 | pinfo->bank_physical = (h->u.def.value | |
716 | + h->u.def.section->output_section->vma | |
717 | + h->u.def.section->output_offset); | |
718 | ||
719 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME, | |
720 | FALSE, FALSE, TRUE); | |
721 | if (h != (struct bfd_link_hash_entry*) NULL | |
722 | && h->type == bfd_link_hash_defined) | |
723 | pinfo->bank_virtual = (h->u.def.value | |
724 | + h->u.def.section->output_section->vma | |
725 | + h->u.def.section->output_offset); | |
726 | ||
727 | h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME, | |
728 | FALSE, FALSE, TRUE); | |
729 | if (h != (struct bfd_link_hash_entry*) NULL | |
730 | && h->type == bfd_link_hash_defined) | |
731 | pinfo->bank_size = (h->u.def.value | |
732 | + h->u.def.section->output_section->vma | |
733 | + h->u.def.section->output_offset); | |
734 | ||
735 | pinfo->bank_shift = 0; | |
736 | for (i = pinfo->bank_size; i != 0; i >>= 1) | |
737 | pinfo->bank_shift++; | |
738 | pinfo->bank_shift--; | |
739 | pinfo->bank_mask = (1 << pinfo->bank_shift) - 1; | |
740 | pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size; | |
741 | pinfo->bank_param_initialized = 1; | |
742 | ||
743 | h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE, | |
744 | FALSE, TRUE); | |
745 | if (h != (struct bfd_link_hash_entry*) NULL | |
746 | && h->type == bfd_link_hash_defined) | |
747 | pinfo->trampoline_addr = (h->u.def.value | |
748 | + h->u.def.section->output_section->vma | |
749 | + h->u.def.section->output_offset); | |
750 | } | |
751 | ||
752 | /* Return 1 if the address is in banked memory. | |
753 | This can be applied to a virtual address and to a physical address. */ | |
754 | int | |
0a6a3ebe | 755 | m68hc11_addr_is_banked (struct m68hc11_page_info *pinfo, bfd_vma addr) |
3a65329d SC |
756 | { |
757 | if (addr >= pinfo->bank_virtual) | |
758 | return 1; | |
759 | ||
760 | if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end) | |
761 | return 1; | |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
766 | /* Return the physical address seen by the processor, taking | |
767 | into account banked memory. */ | |
768 | bfd_vma | |
0a6a3ebe | 769 | m68hc11_phys_addr (struct m68hc11_page_info *pinfo, bfd_vma addr) |
3a65329d SC |
770 | { |
771 | if (addr < pinfo->bank_virtual) | |
772 | return addr; | |
773 | ||
774 | /* Map the address to the memory bank. */ | |
775 | addr -= pinfo->bank_virtual; | |
776 | addr &= pinfo->bank_mask; | |
777 | addr += pinfo->bank_physical; | |
778 | return addr; | |
779 | } | |
780 | ||
781 | /* Return the page number corresponding to an address in banked memory. */ | |
782 | bfd_vma | |
0a6a3ebe | 783 | m68hc11_phys_page (struct m68hc11_page_info *pinfo, bfd_vma addr) |
3a65329d SC |
784 | { |
785 | if (addr < pinfo->bank_virtual) | |
786 | return 0; | |
787 | ||
788 | /* Map the address to the memory bank. */ | |
789 | addr -= pinfo->bank_virtual; | |
790 | addr >>= pinfo->bank_shift; | |
791 | addr &= 0x0ff; | |
792 | return addr; | |
793 | } | |
794 | ||
795 | /* This function is used for relocs which are only used for relaxing, | |
796 | which the linker should otherwise ignore. */ | |
797 | ||
798 | bfd_reloc_status_type | |
0a6a3ebe SC |
799 | m68hc11_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
800 | arelent *reloc_entry, | |
801 | asymbol *symbol ATTRIBUTE_UNUSED, | |
802 | void *data ATTRIBUTE_UNUSED, | |
803 | asection *input_section, | |
804 | bfd *output_bfd, | |
805 | char **error_message ATTRIBUTE_UNUSED) | |
3a65329d SC |
806 | { |
807 | if (output_bfd != NULL) | |
808 | reloc_entry->address += input_section->output_offset; | |
809 | return bfd_reloc_ok; | |
810 | } | |
811 | ||
812 | bfd_reloc_status_type | |
0a6a3ebe SC |
813 | m68hc11_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
814 | arelent *reloc_entry, | |
815 | asymbol *symbol, | |
816 | void *data ATTRIBUTE_UNUSED, | |
817 | asection *input_section, | |
818 | bfd *output_bfd, | |
819 | char **error_message ATTRIBUTE_UNUSED) | |
3a65329d SC |
820 | { |
821 | if (output_bfd != (bfd *) NULL | |
822 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
823 | && (! reloc_entry->howto->partial_inplace | |
824 | || reloc_entry->addend == 0)) | |
825 | { | |
826 | reloc_entry->address += input_section->output_offset; | |
827 | return bfd_reloc_ok; | |
828 | } | |
829 | ||
830 | if (output_bfd != NULL) | |
831 | return bfd_reloc_continue; | |
832 | ||
07515404 | 833 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
3a65329d SC |
834 | return bfd_reloc_outofrange; |
835 | ||
836 | abort(); | |
837 | } | |
838 | ||
3a65329d SC |
839 | /* Look through the relocs for a section during the first phase. |
840 | Since we don't do .gots or .plts, we just need to consider the | |
841 | virtual table relocs for gc. */ | |
842 | ||
843 | bfd_boolean | |
0a6a3ebe SC |
844 | elf32_m68hc11_check_relocs (bfd *abfd, struct bfd_link_info *info, |
845 | asection *sec, const Elf_Internal_Rela *relocs) | |
3a65329d SC |
846 | { |
847 | Elf_Internal_Shdr * symtab_hdr; | |
848 | struct elf_link_hash_entry ** sym_hashes; | |
3a65329d SC |
849 | const Elf_Internal_Rela * rel; |
850 | const Elf_Internal_Rela * rel_end; | |
851 | ||
1049f94e | 852 | if (info->relocatable) |
3a65329d SC |
853 | return TRUE; |
854 | ||
855 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
856 | sym_hashes = elf_sym_hashes (abfd); | |
3a65329d SC |
857 | rel_end = relocs + sec->reloc_count; |
858 | ||
859 | for (rel = relocs; rel < rel_end; rel++) | |
860 | { | |
861 | struct elf_link_hash_entry * h; | |
862 | unsigned long r_symndx; | |
863 | ||
864 | r_symndx = ELF32_R_SYM (rel->r_info); | |
865 | ||
866 | if (r_symndx < symtab_hdr->sh_info) | |
867 | h = NULL; | |
868 | else | |
973a3492 L |
869 | { |
870 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
871 | while (h->root.type == bfd_link_hash_indirect | |
872 | || h->root.type == bfd_link_hash_warning) | |
873 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
81fbe831 AM |
874 | |
875 | /* PR15323, ref flags aren't set for references in the same | |
876 | object. */ | |
877 | h->root.non_ir_ref = 1; | |
973a3492 | 878 | } |
3a65329d SC |
879 | |
880 | switch (ELF32_R_TYPE (rel->r_info)) | |
881 | { | |
882 | /* This relocation describes the C++ object vtable hierarchy. | |
883 | Reconstruct it for later use during GC. */ | |
884 | case R_M68HC11_GNU_VTINHERIT: | |
c152c796 | 885 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
3a65329d SC |
886 | return FALSE; |
887 | break; | |
888 | ||
889 | /* This relocation describes which C++ vtable entries are actually | |
890 | used. Record for later use during GC. */ | |
891 | case R_M68HC11_GNU_VTENTRY: | |
d17e0c6e JB |
892 | BFD_ASSERT (h != NULL); |
893 | if (h != NULL | |
894 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
3a65329d SC |
895 | return FALSE; |
896 | break; | |
897 | } | |
898 | } | |
899 | ||
900 | return TRUE; | |
901 | } | |
902 | ||
3a65329d SC |
903 | /* Relocate a 68hc11/68hc12 ELF section. */ |
904 | bfd_boolean | |
0a6a3ebe SC |
905 | elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
906 | struct bfd_link_info *info, | |
907 | bfd *input_bfd, asection *input_section, | |
908 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
909 | Elf_Internal_Sym *local_syms, | |
910 | asection **local_sections) | |
3a65329d SC |
911 | { |
912 | Elf_Internal_Shdr *symtab_hdr; | |
913 | struct elf_link_hash_entry **sym_hashes; | |
914 | Elf_Internal_Rela *rel, *relend; | |
9b69b847 | 915 | const char *name = NULL; |
3a65329d | 916 | struct m68hc11_page_info *pinfo; |
9c5bfbb7 | 917 | const struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd); |
4dfe6ac6 | 918 | struct m68hc11_elf_link_hash_table *htab; |
9a92d0ce | 919 | unsigned long e_flags; |
3a65329d SC |
920 | |
921 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
922 | sym_hashes = elf_sym_hashes (input_bfd); | |
9a92d0ce | 923 | e_flags = elf_elfheader (input_bfd)->e_flags; |
3a65329d | 924 | |
4dfe6ac6 NC |
925 | htab = m68hc11_elf_hash_table (info); |
926 | if (htab == NULL) | |
927 | return FALSE; | |
928 | ||
3a65329d SC |
929 | /* Get memory bank parameters. */ |
930 | m68hc11_elf_get_bank_parameters (info); | |
3a65329d | 931 | |
4dfe6ac6 | 932 | pinfo = & htab->pinfo; |
3a65329d SC |
933 | rel = relocs; |
934 | relend = relocs + input_section->reloc_count; | |
4dfe6ac6 | 935 | |
3a65329d SC |
936 | for (; rel < relend; rel++) |
937 | { | |
938 | int r_type; | |
939 | arelent arel; | |
940 | reloc_howto_type *howto; | |
941 | unsigned long r_symndx; | |
942 | Elf_Internal_Sym *sym; | |
943 | asection *sec; | |
9b69b847 | 944 | bfd_vma relocation = 0; |
3a65329d SC |
945 | bfd_reloc_status_type r = bfd_reloc_undefined; |
946 | bfd_vma phys_page; | |
947 | bfd_vma phys_addr; | |
948 | bfd_vma insn_addr; | |
949 | bfd_vma insn_page; | |
9b69b847 | 950 | bfd_boolean is_far = FALSE; |
082d1122 NC |
951 | bfd_boolean is_xgate_symbol = FALSE; |
952 | bfd_boolean is_section_symbol = FALSE; | |
ab96bf03 | 953 | struct elf_link_hash_entry *h; |
6927f982 | 954 | bfd_vma val; |
3a65329d SC |
955 | |
956 | r_symndx = ELF32_R_SYM (rel->r_info); | |
957 | r_type = ELF32_R_TYPE (rel->r_info); | |
958 | ||
959 | if (r_type == R_M68HC11_GNU_VTENTRY | |
082d1122 | 960 | || r_type == R_M68HC11_GNU_VTINHERIT) |
3a65329d SC |
961 | continue; |
962 | ||
ab96bf03 AM |
963 | (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel); |
964 | howto = arel.howto; | |
965 | ||
966 | h = NULL; | |
967 | sym = NULL; | |
968 | sec = NULL; | |
969 | if (r_symndx < symtab_hdr->sh_info) | |
970 | { | |
971 | sym = local_syms + r_symndx; | |
972 | sec = local_sections[r_symndx]; | |
973 | relocation = (sec->output_section->vma | |
974 | + sec->output_offset | |
975 | + sym->st_value); | |
976 | is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); | |
082d1122 NC |
977 | is_xgate_symbol = (sym && (sym->st_target_internal)); |
978 | is_section_symbol = ELF_ST_TYPE (sym->st_info) & STT_SECTION; | |
ab96bf03 AM |
979 | } |
980 | else | |
981 | { | |
62d887d4 | 982 | bfd_boolean unresolved_reloc, warned, ignored; |
ab96bf03 AM |
983 | |
984 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
985 | r_symndx, symtab_hdr, sym_hashes, | |
986 | h, sec, relocation, unresolved_reloc, | |
62d887d4 | 987 | warned, ignored); |
ab96bf03 AM |
988 | |
989 | is_far = (h && (h->other & STO_M68HC12_FAR)); | |
082d1122 | 990 | is_xgate_symbol = (h && (h->target_internal)); |
ab96bf03 AM |
991 | } |
992 | ||
dbaa2011 | 993 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 994 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 995 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 996 | |
1049f94e | 997 | if (info->relocatable) |
3a65329d | 998 | { |
1049f94e | 999 | /* This is a relocatable link. We don't have to change |
3a65329d SC |
1000 | anything, unless the reloc is against a section symbol, |
1001 | in which case we have to adjust according to where the | |
1002 | section symbol winds up in the output section. */ | |
ab96bf03 AM |
1003 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
1004 | rel->r_addend += sec->output_offset; | |
3a65329d SC |
1005 | continue; |
1006 | } | |
3a65329d | 1007 | |
ab96bf03 AM |
1008 | if (h != NULL) |
1009 | name = h->root.root.string; | |
1010 | else | |
1011 | { | |
1012 | name = (bfd_elf_string_from_elf_section | |
1013 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
1014 | if (name == NULL || *name == '\0') | |
1015 | name = bfd_section_name (input_bfd, sec); | |
1016 | } | |
1017 | ||
1018 | if (is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16) | |
1019 | { | |
1020 | struct elf32_m68hc11_stub_hash_entry* stub; | |
ab96bf03 | 1021 | |
ab96bf03 AM |
1022 | stub = m68hc12_stub_hash_lookup (htab->stub_hash_table, |
1023 | name, FALSE, FALSE); | |
1024 | if (stub) | |
1025 | { | |
1026 | relocation = stub->stub_offset | |
1027 | + stub->stub_sec->output_section->vma | |
1028 | + stub->stub_sec->output_offset; | |
1029 | is_far = FALSE; | |
1030 | } | |
1031 | } | |
3a65329d SC |
1032 | |
1033 | /* Do the memory bank mapping. */ | |
1034 | phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend); | |
1035 | phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend); | |
1036 | switch (r_type) | |
1037 | { | |
6927f982 NC |
1038 | case R_M68HC12_LO8XG: |
1039 | /* This relocation is specific to XGATE IMM16 calls and will precede | |
1040 | a HI8. tc-m68hc11 only generates them in pairs. | |
1041 | Leave the relocation to the HI8XG step. */ | |
1042 | r = bfd_reloc_ok; | |
1043 | r_type = R_M68HC11_NONE; | |
1044 | break; | |
1045 | ||
1046 | case R_M68HC12_HI8XG: | |
1047 | /* This relocation is specific to XGATE IMM16 calls and must follow | |
1048 | a LO8XG. Does not actually check that it was a LO8XG. | |
1049 | Adjusts high and low bytes. */ | |
1050 | relocation = phys_addr; | |
9a92d0ce | 1051 | if ((e_flags & E_M68HC11_XGATE_RAMOFFSET) |
6927f982 NC |
1052 | && (relocation >= 0x2000)) |
1053 | relocation += 0xc000; /* HARDCODED RAM offset for XGATE. */ | |
1054 | ||
1055 | /* Fetch 16 bit value including low byte in previous insn. */ | |
1056 | val = (bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset) << 8) | |
1057 | | bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset - 2); | |
1058 | ||
1059 | /* Add on value to preserve carry, then write zero to high byte. */ | |
1060 | relocation += val; | |
1061 | ||
1062 | /* Write out top byte. */ | |
1063 | bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, | |
1064 | (bfd_byte*) contents + rel->r_offset); | |
1065 | ||
1066 | /* Write out low byte to previous instruction. */ | |
1067 | bfd_put_8 (input_bfd, relocation & 0xff, | |
1068 | (bfd_byte*) contents + rel->r_offset - 2); | |
1069 | ||
1070 | /* Mark as relocation completed. */ | |
1071 | r = bfd_reloc_ok; | |
1072 | r_type = R_M68HC11_NONE; | |
1073 | break; | |
1074 | ||
1075 | /* The HI8 and LO8 relocs are generated by %hi(expr) %lo(expr) | |
1076 | assembler directives. %hi does not support carry. */ | |
1077 | case R_M68HC11_HI8: | |
1078 | case R_M68HC11_LO8: | |
1079 | relocation = phys_addr; | |
1080 | break; | |
1081 | ||
3a65329d SC |
1082 | case R_M68HC11_24: |
1083 | /* Reloc used by 68HC12 call instruction. */ | |
1084 | bfd_put_16 (input_bfd, phys_addr, | |
1085 | (bfd_byte*) contents + rel->r_offset); | |
1086 | bfd_put_8 (input_bfd, phys_page, | |
1087 | (bfd_byte*) contents + rel->r_offset + 2); | |
1088 | r = bfd_reloc_ok; | |
1089 | r_type = R_M68HC11_NONE; | |
1090 | break; | |
1091 | ||
1092 | case R_M68HC11_NONE: | |
1093 | r = bfd_reloc_ok; | |
1094 | break; | |
1095 | ||
1096 | case R_M68HC11_LO16: | |
1097 | /* Reloc generated by %addr(expr) gas to obtain the | |
1098 | address as mapped in the memory bank window. */ | |
1099 | relocation = phys_addr; | |
1100 | break; | |
1101 | ||
1102 | case R_M68HC11_PAGE: | |
1103 | /* Reloc generated by %page(expr) gas to obtain the | |
1104 | page number associated with the address. */ | |
1105 | relocation = phys_page; | |
1106 | break; | |
1107 | ||
1108 | case R_M68HC11_16: | |
1109 | /* Get virtual address of instruction having the relocation. */ | |
1110 | if (is_far) | |
1111 | { | |
1112 | const char* msg; | |
1113 | char* buf; | |
1114 | msg = _("Reference to the far symbol `%s' using a wrong " | |
1115 | "relocation may result in incorrect execution"); | |
1116 | buf = alloca (strlen (msg) + strlen (name) + 10); | |
1117 | sprintf (buf, msg, name); | |
68ffbac6 | 1118 | |
3a65329d SC |
1119 | (* info->callbacks->warning) |
1120 | (info, buf, name, input_bfd, NULL, rel->r_offset); | |
1121 | } | |
1122 | ||
1123 | /* Get virtual address of instruction having the relocation. */ | |
1124 | insn_addr = input_section->output_section->vma | |
1125 | + input_section->output_offset | |
1126 | + rel->r_offset; | |
1127 | ||
1128 | insn_page = m68hc11_phys_page (pinfo, insn_addr); | |
1129 | ||
082d1122 NC |
1130 | /* If we are linking an S12 instruction against an XGATE symbol, we |
1131 | need to change the offset of the symbol value so that it's correct | |
1132 | from the S12's perspective. */ | |
1133 | if (is_xgate_symbol) | |
1134 | { | |
1135 | /* The ram in the global space is mapped to 0x2000 in the 16-bit | |
1136 | address space for S12 and 0xE000 in the 16-bit address space | |
1137 | for XGATE. */ | |
1138 | if (relocation >= 0xE000) | |
1139 | { | |
1140 | /* We offset the address by the difference | |
1141 | between these two mappings. */ | |
1142 | relocation -= 0xC000; | |
1143 | break; | |
1144 | } | |
1145 | else | |
1146 | { | |
1147 | const char * msg; | |
1148 | char * buf; | |
1149 | ||
1150 | msg = _("XGATE address (%lx) is not within shared RAM" | |
1151 | "(0xE000-0xFFFF), therefore you must manually offset " | |
1152 | "the address, and possibly manage the page, in your " | |
1153 | "code."); | |
1154 | buf = alloca (strlen (msg) + 128); | |
1155 | sprintf (buf, msg, phys_addr); | |
1156 | if (!((*info->callbacks->warning) (info, buf, name, input_bfd, | |
1157 | input_section, insn_addr))) | |
1158 | return FALSE; | |
1159 | break; | |
1160 | } | |
1161 | } | |
1162 | ||
3a65329d SC |
1163 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend) |
1164 | && m68hc11_addr_is_banked (pinfo, insn_addr) | |
9a92d0ce | 1165 | && phys_page != insn_page && !(e_flags & E_M68HC11_NO_BANK_WARNING)) |
3a65329d | 1166 | { |
082d1122 NC |
1167 | const char * msg; |
1168 | char * buf; | |
3a65329d SC |
1169 | |
1170 | msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank " | |
1171 | "as current banked address [%lx:%04lx] (%lx)"); | |
1172 | ||
1173 | buf = alloca (strlen (msg) + 128); | |
1174 | sprintf (buf, msg, phys_page, phys_addr, | |
1175 | (long) (relocation + rel->r_addend), | |
1176 | insn_page, m68hc11_phys_addr (pinfo, insn_addr), | |
1177 | (long) (insn_addr)); | |
1178 | if (!((*info->callbacks->warning) | |
1179 | (info, buf, name, input_bfd, input_section, | |
1180 | rel->r_offset))) | |
1181 | return FALSE; | |
1182 | break; | |
1183 | } | |
082d1122 | 1184 | |
3a65329d SC |
1185 | if (phys_page != 0 && insn_page == 0) |
1186 | { | |
082d1122 NC |
1187 | const char * msg; |
1188 | char * buf; | |
3a65329d SC |
1189 | |
1190 | msg = _("reference to a banked address [%lx:%04lx] in the " | |
1191 | "normal address space at %04lx"); | |
1192 | ||
1193 | buf = alloca (strlen (msg) + 128); | |
1194 | sprintf (buf, msg, phys_page, phys_addr, insn_addr); | |
1195 | if (!((*info->callbacks->warning) | |
1196 | (info, buf, name, input_bfd, input_section, | |
1197 | insn_addr))) | |
1198 | return FALSE; | |
1199 | ||
1200 | relocation = phys_addr; | |
1201 | break; | |
1202 | } | |
1203 | ||
1204 | /* If this is a banked address use the phys_addr so that | |
1205 | we stay in the banked window. */ | |
1206 | if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)) | |
1207 | relocation = phys_addr; | |
1208 | break; | |
1209 | } | |
6927f982 | 1210 | |
082d1122 NC |
1211 | /* If we are linking an XGATE instruction against an S12 symbol, we |
1212 | need to change the offset of the symbol value so that it's correct | |
1213 | from the XGATE's perspective. */ | |
1214 | if (!strcmp (howto->name, "R_XGATE_IMM8_LO") | |
1215 | || !strcmp (howto->name, "R_XGATE_IMM8_HI")) | |
1216 | { | |
1217 | /* We can only offset S12 addresses that lie within the non-paged | |
1218 | area of RAM. */ | |
1219 | if (!is_xgate_symbol && !is_section_symbol) | |
1220 | { | |
1221 | /* The ram in the global space is mapped to 0x2000 and stops at | |
1222 | 0x4000 in the 16-bit address space for S12 and 0xE000 in the | |
1223 | 16-bit address space for XGATE. */ | |
1224 | if (relocation >= 0x2000 && relocation < 0x4000) | |
1225 | /* We offset the address by the difference | |
1226 | between these two mappings. */ | |
1227 | relocation += 0xC000; | |
1228 | else | |
1229 | { | |
1230 | const char * msg; | |
1231 | char * buf; | |
1232 | ||
1233 | /* Get virtual address of instruction having the relocation. */ | |
1234 | insn_addr = input_section->output_section->vma | |
1235 | + input_section->output_offset + rel->r_offset; | |
1236 | ||
1237 | msg = _("S12 address (%lx) is not within shared RAM" | |
1238 | "(0x2000-0x4000), therefore you must manually " | |
1239 | "offset the address in your code"); | |
1240 | buf = alloca (strlen (msg) + 128); | |
1241 | sprintf (buf, msg, phys_addr); | |
1242 | if (!((*info->callbacks->warning) (info, buf, name, input_bfd, | |
1243 | input_section, insn_addr))) | |
1244 | return FALSE; | |
1245 | break; | |
1246 | } | |
1247 | } | |
1248 | } | |
1249 | ||
3a65329d | 1250 | if (r_type != R_M68HC11_NONE) |
6927f982 NC |
1251 | { |
1252 | if ((r_type == R_M68HC12_PCREL_9) || (r_type == R_M68HC12_PCREL_10)) | |
1253 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3a65329d | 1254 | contents, rel->r_offset, |
6927f982 NC |
1255 | relocation - 2, rel->r_addend); |
1256 | else | |
1257 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1258 | contents, rel->r_offset, | |
1259 | relocation, rel->r_addend); | |
1260 | } | |
3a65329d SC |
1261 | |
1262 | if (r != bfd_reloc_ok) | |
1263 | { | |
1264 | const char * msg = (const char *) 0; | |
1265 | ||
1266 | switch (r) | |
1267 | { | |
1268 | case bfd_reloc_overflow: | |
1269 | if (!((*info->callbacks->reloc_overflow) | |
dfeffb9f | 1270 | (info, NULL, name, howto->name, (bfd_vma) 0, |
3a65329d SC |
1271 | input_bfd, input_section, rel->r_offset))) |
1272 | return FALSE; | |
1273 | break; | |
1274 | ||
1275 | case bfd_reloc_undefined: | |
1276 | if (!((*info->callbacks->undefined_symbol) | |
1277 | (info, name, input_bfd, input_section, | |
1278 | rel->r_offset, TRUE))) | |
1279 | return FALSE; | |
1280 | break; | |
1281 | ||
1282 | case bfd_reloc_outofrange: | |
1283 | msg = _ ("internal error: out of range error"); | |
1284 | goto common_error; | |
1285 | ||
1286 | case bfd_reloc_notsupported: | |
1287 | msg = _ ("internal error: unsupported relocation error"); | |
1288 | goto common_error; | |
1289 | ||
1290 | case bfd_reloc_dangerous: | |
1291 | msg = _ ("internal error: dangerous error"); | |
1292 | goto common_error; | |
1293 | ||
1294 | default: | |
1295 | msg = _ ("internal error: unknown error"); | |
1296 | /* fall through */ | |
1297 | ||
1298 | common_error: | |
1299 | if (!((*info->callbacks->warning) | |
1300 | (info, msg, name, input_bfd, input_section, | |
1301 | rel->r_offset))) | |
1302 | return FALSE; | |
1303 | break; | |
1304 | } | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | return TRUE; | |
1309 | } | |
1310 | ||
1311 | ||
1312 | \f | |
1313 | /* Set and control ELF flags in ELF header. */ | |
1314 | ||
1315 | bfd_boolean | |
0a6a3ebe | 1316 | _bfd_m68hc11_elf_set_private_flags (bfd *abfd, flagword flags) |
3a65329d SC |
1317 | { |
1318 | BFD_ASSERT (!elf_flags_init (abfd) | |
1319 | || elf_elfheader (abfd)->e_flags == flags); | |
1320 | ||
1321 | elf_elfheader (abfd)->e_flags = flags; | |
1322 | elf_flags_init (abfd) = TRUE; | |
1323 | return TRUE; | |
1324 | } | |
1325 | ||
1326 | /* Merge backend specific data from an object file to the output | |
1327 | object file when linking. */ | |
1328 | ||
1329 | bfd_boolean | |
0a6a3ebe | 1330 | _bfd_m68hc11_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
3a65329d SC |
1331 | { |
1332 | flagword old_flags; | |
1333 | flagword new_flags; | |
1334 | bfd_boolean ok = TRUE; | |
1335 | ||
cc643b88 | 1336 | /* Check if we have the same endianness */ |
3a65329d SC |
1337 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) |
1338 | return FALSE; | |
1339 | ||
1340 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1341 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1342 | return TRUE; | |
1343 | ||
1344 | new_flags = elf_elfheader (ibfd)->e_flags; | |
1345 | elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI; | |
1346 | old_flags = elf_elfheader (obfd)->e_flags; | |
1347 | ||
1348 | if (! elf_flags_init (obfd)) | |
1349 | { | |
1350 | elf_flags_init (obfd) = TRUE; | |
1351 | elf_elfheader (obfd)->e_flags = new_flags; | |
1352 | elf_elfheader (obfd)->e_ident[EI_CLASS] | |
1353 | = elf_elfheader (ibfd)->e_ident[EI_CLASS]; | |
1354 | ||
1355 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
1356 | && bfd_get_arch_info (obfd)->the_default) | |
1357 | { | |
1358 | if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
1359 | bfd_get_mach (ibfd))) | |
1360 | return FALSE; | |
1361 | } | |
1362 | ||
1363 | return TRUE; | |
1364 | } | |
1365 | ||
1366 | /* Check ABI compatibility. */ | |
1367 | if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) | |
1368 | { | |
1369 | (*_bfd_error_handler) | |
d003868e AM |
1370 | (_("%B: linking files compiled for 16-bit integers (-mshort) " |
1371 | "and others for 32-bit integers"), ibfd); | |
3a65329d SC |
1372 | ok = FALSE; |
1373 | } | |
1374 | if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) | |
1375 | { | |
1376 | (*_bfd_error_handler) | |
d003868e AM |
1377 | (_("%B: linking files compiled for 32-bit double (-fshort-double) " |
1378 | "and others for 64-bit double"), ibfd); | |
3a65329d SC |
1379 | ok = FALSE; |
1380 | } | |
47247ced SC |
1381 | |
1382 | /* Processor compatibility. */ | |
1383 | if (!EF_M68HC11_CAN_MERGE_MACH (new_flags, old_flags)) | |
1384 | { | |
1385 | (*_bfd_error_handler) | |
d003868e AM |
1386 | (_("%B: linking files compiled for HCS12 with " |
1387 | "others compiled for HC12"), ibfd); | |
47247ced SC |
1388 | ok = FALSE; |
1389 | } | |
1390 | new_flags = ((new_flags & ~EF_M68HC11_MACH_MASK) | |
1391 | | (EF_M68HC11_MERGE_MACH (new_flags, old_flags))); | |
1392 | ||
1393 | elf_elfheader (obfd)->e_flags = new_flags; | |
1394 | ||
17e58af0 SC |
1395 | new_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); |
1396 | old_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); | |
3a65329d SC |
1397 | |
1398 | /* Warn about any other mismatches */ | |
1399 | if (new_flags != old_flags) | |
1400 | { | |
1401 | (*_bfd_error_handler) | |
d003868e AM |
1402 | (_("%B: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
1403 | ibfd, (unsigned long) new_flags, (unsigned long) old_flags); | |
3a65329d SC |
1404 | ok = FALSE; |
1405 | } | |
1406 | ||
1407 | if (! ok) | |
1408 | { | |
1409 | bfd_set_error (bfd_error_bad_value); | |
1410 | return FALSE; | |
1411 | } | |
1412 | ||
1413 | return TRUE; | |
1414 | } | |
1415 | ||
1416 | bfd_boolean | |
0a6a3ebe | 1417 | _bfd_m68hc11_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
3a65329d SC |
1418 | { |
1419 | FILE *file = (FILE *) ptr; | |
1420 | ||
1421 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
1422 | ||
1423 | /* Print normal ELF private data. */ | |
1424 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
1425 | ||
1426 | /* xgettext:c-format */ | |
1427 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
1428 | ||
1429 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) | |
1430 | fprintf (file, _("[abi=32-bit int, ")); | |
1431 | else | |
1432 | fprintf (file, _("[abi=16-bit int, ")); | |
1433 | ||
1434 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) | |
1435 | fprintf (file, _("64-bit double, ")); | |
1436 | else | |
1437 | fprintf (file, _("32-bit double, ")); | |
1438 | ||
1439 | if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0) | |
1440 | fprintf (file, _("cpu=HC11]")); | |
1441 | else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH) | |
1442 | fprintf (file, _("cpu=HCS12]")); | |
1443 | else | |
68ffbac6 | 1444 | fprintf (file, _("cpu=HC12]")); |
3a65329d SC |
1445 | |
1446 | if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS) | |
1447 | fprintf (file, _(" [memory=bank-model]")); | |
1448 | else | |
1449 | fprintf (file, _(" [memory=flat]")); | |
1450 | ||
6927f982 NC |
1451 | if (elf_elfheader (abfd)->e_flags & E_M68HC11_XGATE_RAMOFFSET) |
1452 | fprintf (file, _(" [XGATE RAM offsetting]")); | |
1453 | ||
3a65329d SC |
1454 | fputc ('\n', file); |
1455 | ||
1456 | return TRUE; | |
1457 | } | |
1458 | ||
0a6a3ebe SC |
1459 | static void scan_sections_for_abi (bfd *abfd ATTRIBUTE_UNUSED, |
1460 | asection *asect, void *arg) | |
3a65329d SC |
1461 | { |
1462 | struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg; | |
1463 | ||
1464 | if (asect->vma >= p->pinfo->bank_virtual) | |
1465 | p->use_memory_banks = TRUE; | |
1466 | } | |
68ffbac6 | 1467 | |
3a65329d SC |
1468 | /* Tweak the OSABI field of the elf header. */ |
1469 | ||
1470 | void | |
0a6a3ebe | 1471 | elf32_m68hc11_post_process_headers (bfd *abfd, struct bfd_link_info *link_info) |
3a65329d SC |
1472 | { |
1473 | struct m68hc11_scan_param param; | |
4dfe6ac6 NC |
1474 | struct m68hc11_elf_link_hash_table *htab; |
1475 | ||
1476 | if (link_info == NULL) | |
1477 | return; | |
3a65329d | 1478 | |
4dfe6ac6 NC |
1479 | htab = m68hc11_elf_hash_table (link_info); |
1480 | if (htab == NULL) | |
3a65329d SC |
1481 | return; |
1482 | ||
1483 | m68hc11_elf_get_bank_parameters (link_info); | |
1484 | ||
1485 | param.use_memory_banks = FALSE; | |
4dfe6ac6 NC |
1486 | param.pinfo = & htab->pinfo; |
1487 | ||
3a65329d | 1488 | bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); |
4dfe6ac6 | 1489 | |
3a65329d SC |
1490 | if (param.use_memory_banks) |
1491 | { | |
1492 | Elf_Internal_Ehdr * i_ehdrp; | |
1493 | ||
1494 | i_ehdrp = elf_elfheader (abfd); | |
1495 | i_ehdrp->e_flags |= E_M68HC12_BANKS; | |
1496 | } | |
1497 | } |