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252b5132 | 1 | /* BFD back-end for HP PA-RISC ELF files. |
e049a0de | 2 | Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999 |
252b5132 RH |
3 | Free Software Foundation, Inc. |
4 | ||
5 | Written by | |
6 | ||
7 | Center for Software Science | |
8 | Department of Computer Science | |
9 | University of Utah | |
10 | ||
11 | This file is part of BFD, the Binary File Descriptor library. | |
12 | ||
13 | This program is free software; you can redistribute it and/or modify | |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation; either version 2 of the License, or | |
16 | (at your option) any later version. | |
17 | ||
18 | This program is distributed in the hope that it will be useful, | |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU General Public License | |
24 | along with this program; if not, write to the Free Software | |
25 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
26 | ||
27 | #include "bfd.h" | |
28 | #include "sysdep.h" | |
252b5132 RH |
29 | #include "libbfd.h" |
30 | #include "elf-bfd.h" | |
9e103c9c JL |
31 | #include "elf/hppa.h" |
32 | #include "libhppa.h" | |
33 | #include "elf32-hppa.h" | |
34 | #define ARCH_SIZE 32 | |
35 | #include "elf-hppa.h" | |
36 | ||
252b5132 | 37 | |
252b5132 RH |
38 | /* We use three different hash tables to hold information for |
39 | linking PA ELF objects. | |
40 | ||
41 | The first is the elf32_hppa_link_hash_table which is derived | |
42 | from the standard ELF linker hash table. We use this as a place to | |
43 | attach other hash tables and static information. | |
44 | ||
45 | The second is the stub hash table which is derived from the | |
46 | base BFD hash table. The stub hash table holds the information | |
31bd8f25 | 47 | necessary to build the linker stubs during a link. */ |
252b5132 RH |
48 | |
49 | /* Hash table for linker stubs. */ | |
50 | ||
51 | struct elf32_hppa_stub_hash_entry | |
52 | { | |
53 | /* Base hash table entry structure, we can get the name of the stub | |
54 | (and thus know exactly what actions it performs) from the base | |
55 | hash table entry. */ | |
56 | struct bfd_hash_entry root; | |
57 | ||
58 | /* Offset of the beginning of this stub. */ | |
59 | bfd_vma offset; | |
60 | ||
61 | /* Given the symbol's value and its section we can determine its final | |
62 | value when building the stubs (so the stub knows where to jump. */ | |
63 | symvalue target_value; | |
64 | asection *target_section; | |
65 | }; | |
66 | ||
67 | struct elf32_hppa_stub_hash_table | |
68 | { | |
69 | /* The hash table itself. */ | |
70 | struct bfd_hash_table root; | |
71 | ||
72 | /* The stub BFD. */ | |
73 | bfd *stub_bfd; | |
74 | ||
75 | /* Where to place the next stub. */ | |
76 | bfd_byte *location; | |
77 | ||
78 | /* Current offset in the stub section. */ | |
79 | unsigned int offset; | |
80 | ||
81 | }; | |
82 | ||
252b5132 RH |
83 | struct elf32_hppa_link_hash_entry |
84 | { | |
85 | struct elf_link_hash_entry root; | |
86 | }; | |
87 | ||
88 | struct elf32_hppa_link_hash_table | |
89 | { | |
90 | /* The main hash table. */ | |
91 | struct elf_link_hash_table root; | |
92 | ||
93 | /* The stub hash table. */ | |
94 | struct elf32_hppa_stub_hash_table *stub_hash_table; | |
95 | ||
252b5132 RH |
96 | /* A count of the number of output symbols. */ |
97 | unsigned int output_symbol_count; | |
98 | ||
99 | /* Stuff so we can handle DP relative relocations. */ | |
100 | long global_value; | |
101 | int global_sym_defined; | |
102 | }; | |
103 | ||
252b5132 RH |
104 | /* ELF32/HPPA relocation support |
105 | ||
106 | This file contains ELF32/HPPA relocation support as specified | |
107 | in the Stratus FTX/Golf Object File Format (SED-1762) dated | |
108 | February 1994. */ | |
109 | ||
110 | #include "elf32-hppa.h" | |
111 | #include "hppa_stubs.h" | |
112 | ||
252b5132 RH |
113 | static unsigned long hppa_elf_relocate_insn |
114 | PARAMS ((bfd *, asection *, unsigned long, unsigned long, long, | |
115 | long, unsigned long, unsigned long, unsigned long)); | |
116 | ||
252b5132 RH |
117 | static boolean hppa_elf_is_local_label_name PARAMS ((bfd *, const char *)); |
118 | ||
119 | static boolean elf32_hppa_add_symbol_hook | |
120 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
121 | const char **, flagword *, asection **, bfd_vma *)); | |
122 | ||
123 | static bfd_reloc_status_type elf32_hppa_bfd_final_link_relocate | |
124 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, | |
125 | bfd_byte *, bfd_vma, bfd_vma, bfd_vma, struct bfd_link_info *, | |
126 | asection *, const char *, int)); | |
127 | ||
128 | static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create | |
129 | PARAMS ((bfd *)); | |
130 | ||
131 | static struct bfd_hash_entry * | |
132 | elf32_hppa_stub_hash_newfunc | |
133 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
134 | ||
252b5132 RH |
135 | static boolean |
136 | elf32_hppa_relocate_section | |
137 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, | |
138 | bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
139 | ||
140 | static boolean | |
141 | elf32_hppa_stub_hash_table_init | |
142 | PARAMS ((struct elf32_hppa_stub_hash_table *, bfd *, | |
143 | struct bfd_hash_entry *(*) PARAMS ((struct bfd_hash_entry *, | |
144 | struct bfd_hash_table *, | |
145 | const char *)))); | |
146 | ||
147 | static boolean | |
148 | elf32_hppa_build_one_stub PARAMS ((struct bfd_hash_entry *, PTR)); | |
149 | ||
252b5132 | 150 | static unsigned int elf32_hppa_size_of_stub |
31bd8f25 | 151 | PARAMS ((bfd_vma, bfd_vma, const char *)); |
252b5132 RH |
152 | |
153 | static void elf32_hppa_name_of_stub | |
31bd8f25 | 154 | PARAMS ((bfd_vma, bfd_vma, char *)); |
252b5132 RH |
155 | |
156 | /* For linker stub hash tables. */ | |
157 | #define elf32_hppa_stub_hash_lookup(table, string, create, copy) \ | |
158 | ((struct elf32_hppa_stub_hash_entry *) \ | |
159 | bfd_hash_lookup (&(table)->root, (string), (create), (copy))) | |
160 | ||
161 | #define elf32_hppa_stub_hash_traverse(table, func, info) \ | |
162 | (bfd_hash_traverse \ | |
163 | (&(table)->root, \ | |
164 | (boolean (*) PARAMS ((struct bfd_hash_entry *, PTR))) (func), \ | |
165 | (info))) | |
166 | ||
252b5132 RH |
167 | /* For HPPA linker hash table. */ |
168 | ||
169 | #define elf32_hppa_link_hash_lookup(table, string, create, copy, follow)\ | |
170 | ((struct elf32_hppa_link_hash_entry *) \ | |
171 | elf_link_hash_lookup (&(table)->root, (string), (create), \ | |
172 | (copy), (follow))) | |
173 | ||
174 | #define elf32_hppa_link_hash_traverse(table, func, info) \ | |
175 | (elf_link_hash_traverse \ | |
176 | (&(table)->root, \ | |
177 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
178 | (info))) | |
179 | ||
180 | /* Get the PA ELF linker hash table from a link_info structure. */ | |
181 | ||
182 | #define elf32_hppa_hash_table(p) \ | |
183 | ((struct elf32_hppa_link_hash_table *) ((p)->hash)) | |
184 | ||
185 | ||
252b5132 RH |
186 | /* Assorted hash table functions. */ |
187 | ||
188 | /* Initialize an entry in the stub hash table. */ | |
189 | ||
190 | static struct bfd_hash_entry * | |
191 | elf32_hppa_stub_hash_newfunc (entry, table, string) | |
192 | struct bfd_hash_entry *entry; | |
193 | struct bfd_hash_table *table; | |
194 | const char *string; | |
195 | { | |
196 | struct elf32_hppa_stub_hash_entry *ret; | |
197 | ||
198 | ret = (struct elf32_hppa_stub_hash_entry *) entry; | |
199 | ||
200 | /* Allocate the structure if it has not already been allocated by a | |
201 | subclass. */ | |
202 | if (ret == NULL) | |
203 | ret = ((struct elf32_hppa_stub_hash_entry *) | |
204 | bfd_hash_allocate (table, | |
205 | sizeof (struct elf32_hppa_stub_hash_entry))); | |
206 | if (ret == NULL) | |
207 | return NULL; | |
208 | ||
209 | /* Call the allocation method of the superclass. */ | |
210 | ret = ((struct elf32_hppa_stub_hash_entry *) | |
211 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); | |
212 | ||
213 | if (ret) | |
214 | { | |
215 | /* Initialize the local fields. */ | |
216 | ret->offset = 0; | |
217 | ret->target_value = 0; | |
218 | ret->target_section = NULL; | |
219 | } | |
220 | ||
221 | return (struct bfd_hash_entry *) ret; | |
222 | } | |
223 | ||
224 | /* Initialize a stub hash table. */ | |
225 | ||
226 | static boolean | |
227 | elf32_hppa_stub_hash_table_init (table, stub_bfd, newfunc) | |
228 | struct elf32_hppa_stub_hash_table *table; | |
229 | bfd *stub_bfd; | |
230 | struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, | |
231 | struct bfd_hash_table *, | |
232 | const char *)); | |
233 | { | |
234 | table->offset = 0; | |
235 | table->location = 0; | |
236 | table->stub_bfd = stub_bfd; | |
237 | return (bfd_hash_table_init (&table->root, newfunc)); | |
238 | } | |
239 | ||
252b5132 RH |
240 | /* Create the derived linker hash table. The PA ELF port uses the derived |
241 | hash table to keep information specific to the PA ELF linker (without | |
242 | using static variables). */ | |
243 | ||
244 | static struct bfd_link_hash_table * | |
245 | elf32_hppa_link_hash_table_create (abfd) | |
246 | bfd *abfd; | |
247 | { | |
248 | struct elf32_hppa_link_hash_table *ret; | |
249 | ||
250 | ret = ((struct elf32_hppa_link_hash_table *) | |
251 | bfd_alloc (abfd, sizeof (struct elf32_hppa_link_hash_table))); | |
252 | if (ret == NULL) | |
253 | return NULL; | |
254 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
255 | _bfd_elf_link_hash_newfunc)) | |
256 | { | |
257 | bfd_release (abfd, ret); | |
258 | return NULL; | |
259 | } | |
260 | ret->stub_hash_table = NULL; | |
252b5132 RH |
261 | ret->output_symbol_count = 0; |
262 | ret->global_value = 0; | |
263 | ret->global_sym_defined = 0; | |
264 | ||
265 | return &ret->root.root; | |
266 | } | |
267 | ||
268 | /* Relocate the given INSN given the various input parameters. | |
269 | ||
270 | FIXME: endianness and sizeof (long) issues abound here. */ | |
271 | ||
272 | static unsigned long | |
273 | hppa_elf_relocate_insn (abfd, input_sect, insn, address, sym_value, | |
274 | r_addend, r_format, r_field, pcrel) | |
275 | bfd *abfd; | |
276 | asection *input_sect; | |
277 | unsigned long insn; | |
278 | unsigned long address; | |
279 | long sym_value; | |
280 | long r_addend; | |
281 | unsigned long r_format; | |
282 | unsigned long r_field; | |
283 | unsigned long pcrel; | |
284 | { | |
285 | unsigned char opcode = get_opcode (insn); | |
286 | long constant_value; | |
287 | ||
288 | switch (opcode) | |
289 | { | |
290 | case LDO: | |
291 | case LDB: | |
292 | case LDH: | |
293 | case LDW: | |
294 | case LDWM: | |
295 | case STB: | |
296 | case STH: | |
297 | case STW: | |
298 | case STWM: | |
299 | case COMICLR: | |
300 | case SUBI: | |
301 | case ADDIT: | |
302 | case ADDI: | |
303 | case LDIL: | |
304 | case ADDIL: | |
305 | constant_value = HPPA_R_CONSTANT (r_addend); | |
306 | ||
307 | if (pcrel) | |
308 | sym_value -= address; | |
309 | ||
310 | sym_value = hppa_field_adjust (sym_value, constant_value, r_field); | |
311 | return hppa_rebuild_insn (abfd, insn, sym_value, r_format); | |
312 | ||
313 | case BL: | |
314 | case BE: | |
315 | case BLE: | |
316 | /* XXX computing constant_value is not needed??? */ | |
317 | constant_value = assemble_17 ((insn & 0x001f0000) >> 16, | |
318 | (insn & 0x00001ffc) >> 2, | |
319 | insn & 1); | |
320 | ||
321 | constant_value = (constant_value << 15) >> 15; | |
322 | if (pcrel) | |
323 | { | |
324 | sym_value -= | |
325 | address + input_sect->output_offset | |
326 | + input_sect->output_section->vma; | |
327 | sym_value = hppa_field_adjust (sym_value, -8, r_field); | |
328 | } | |
329 | else | |
330 | sym_value = hppa_field_adjust (sym_value, constant_value, r_field); | |
331 | ||
332 | return hppa_rebuild_insn (abfd, insn, sym_value >> 2, r_format); | |
333 | ||
334 | default: | |
335 | if (opcode == 0) | |
336 | { | |
337 | constant_value = HPPA_R_CONSTANT (r_addend); | |
338 | ||
339 | if (pcrel) | |
340 | sym_value -= address; | |
341 | ||
342 | return hppa_field_adjust (sym_value, constant_value, r_field); | |
343 | } | |
344 | else | |
345 | abort (); | |
346 | } | |
347 | } | |
348 | ||
349 | /* Relocate an HPPA ELF section. */ | |
350 | ||
351 | static boolean | |
352 | elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section, | |
353 | contents, relocs, local_syms, local_sections) | |
354 | bfd *output_bfd; | |
355 | struct bfd_link_info *info; | |
356 | bfd *input_bfd; | |
357 | asection *input_section; | |
358 | bfd_byte *contents; | |
359 | Elf_Internal_Rela *relocs; | |
360 | Elf_Internal_Sym *local_syms; | |
361 | asection **local_sections; | |
362 | { | |
363 | Elf_Internal_Shdr *symtab_hdr; | |
364 | Elf_Internal_Rela *rel; | |
365 | Elf_Internal_Rela *relend; | |
366 | ||
367 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
368 | ||
369 | rel = relocs; | |
370 | relend = relocs + input_section->reloc_count; | |
371 | for (; rel < relend; rel++) | |
372 | { | |
373 | int r_type; | |
374 | reloc_howto_type *howto; | |
375 | unsigned long r_symndx; | |
376 | struct elf_link_hash_entry *h; | |
377 | Elf_Internal_Sym *sym; | |
378 | asection *sym_sec; | |
379 | bfd_vma relocation; | |
380 | bfd_reloc_status_type r; | |
381 | const char *sym_name; | |
382 | ||
383 | r_type = ELF32_R_TYPE (rel->r_info); | |
384 | if (r_type < 0 || r_type >= (int) R_PARISC_UNIMPLEMENTED) | |
385 | { | |
386 | bfd_set_error (bfd_error_bad_value); | |
387 | return false; | |
388 | } | |
389 | howto = elf_hppa_howto_table + r_type; | |
390 | ||
391 | r_symndx = ELF32_R_SYM (rel->r_info); | |
392 | ||
393 | if (info->relocateable) | |
394 | { | |
395 | /* This is a relocateable link. We don't have to change | |
396 | anything, unless the reloc is against a section symbol, | |
397 | in which case we have to adjust according to where the | |
398 | section symbol winds up in the output section. */ | |
399 | if (r_symndx < symtab_hdr->sh_info) | |
400 | { | |
401 | sym = local_syms + r_symndx; | |
402 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
403 | { | |
404 | sym_sec = local_sections[r_symndx]; | |
405 | rel->r_addend += sym_sec->output_offset; | |
406 | } | |
407 | } | |
408 | ||
409 | continue; | |
410 | } | |
411 | ||
412 | /* This is a final link. */ | |
413 | h = NULL; | |
414 | sym = NULL; | |
415 | sym_sec = NULL; | |
416 | if (r_symndx < symtab_hdr->sh_info) | |
417 | { | |
418 | sym = local_syms + r_symndx; | |
419 | sym_sec = local_sections[r_symndx]; | |
420 | relocation = ((ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
421 | ? 0 : sym->st_value) | |
422 | + sym_sec->output_offset | |
423 | + sym_sec->output_section->vma); | |
424 | } | |
425 | else | |
426 | { | |
427 | long indx; | |
428 | ||
429 | indx = r_symndx - symtab_hdr->sh_info; | |
430 | h = elf_sym_hashes (input_bfd)[indx]; | |
431 | while (h->root.type == bfd_link_hash_indirect | |
432 | || h->root.type == bfd_link_hash_warning) | |
433 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
434 | if (h->root.type == bfd_link_hash_defined | |
435 | || h->root.type == bfd_link_hash_defweak) | |
436 | { | |
437 | sym_sec = h->root.u.def.section; | |
438 | relocation = (h->root.u.def.value | |
439 | + sym_sec->output_offset | |
440 | + sym_sec->output_section->vma); | |
441 | } | |
442 | else if (h->root.type == bfd_link_hash_undefweak) | |
443 | relocation = 0; | |
444 | else | |
445 | { | |
446 | if (!((*info->callbacks->undefined_symbol) | |
447 | (info, h->root.root.string, input_bfd, | |
448 | input_section, rel->r_offset))) | |
449 | return false; | |
450 | break; | |
451 | } | |
452 | } | |
453 | ||
454 | if (h != NULL) | |
455 | sym_name = h->root.root.string; | |
456 | else | |
457 | { | |
458 | sym_name = bfd_elf_string_from_elf_section (input_bfd, | |
459 | symtab_hdr->sh_link, | |
460 | sym->st_name); | |
461 | if (sym_name == NULL) | |
462 | return false; | |
463 | if (*sym_name == '\0') | |
464 | sym_name = bfd_section_name (input_bfd, sym_sec); | |
465 | } | |
466 | ||
252b5132 RH |
467 | r = elf32_hppa_bfd_final_link_relocate (howto, input_bfd, output_bfd, |
468 | input_section, contents, | |
469 | rel->r_offset, relocation, | |
470 | rel->r_addend, info, sym_sec, | |
471 | sym_name, h == NULL); | |
472 | ||
473 | if (r != bfd_reloc_ok) | |
474 | { | |
475 | switch (r) | |
476 | { | |
477 | /* This can happen for DP relative relocs if $global$ is | |
478 | undefined. This is a panic situation so we don't try | |
479 | to continue. */ | |
480 | case bfd_reloc_undefined: | |
481 | case bfd_reloc_notsupported: | |
482 | if (!((*info->callbacks->undefined_symbol) | |
483 | (info, "$global$", input_bfd, | |
484 | input_section, rel->r_offset))) | |
485 | return false; | |
486 | return false; | |
487 | case bfd_reloc_dangerous: | |
488 | { | |
489 | /* We use this return value to indicate that we performed | |
490 | a "dangerous" relocation. This doesn't mean we did | |
491 | the wrong thing, it just means there may be some cleanup | |
492 | that needs to be done here. | |
493 | ||
494 | In particular we had to swap the last call insn and its | |
495 | delay slot. If the delay slot insn needed a relocation, | |
496 | then we'll need to adjust the next relocation entry's | |
497 | offset to account for the fact that the insn moved. | |
498 | ||
499 | This hair wouldn't be necessary if we inserted stubs | |
500 | between procedures and used a "bl" to get to the stub. */ | |
501 | if (rel != relend) | |
502 | { | |
503 | Elf_Internal_Rela *next_rel = rel + 1; | |
504 | ||
505 | if (rel->r_offset + 4 == next_rel->r_offset) | |
506 | next_rel->r_offset -= 4; | |
507 | } | |
508 | break; | |
509 | } | |
510 | default: | |
511 | case bfd_reloc_outofrange: | |
512 | case bfd_reloc_overflow: | |
513 | { | |
514 | if (!((*info->callbacks->reloc_overflow) | |
515 | (info, sym_name, howto->name, (bfd_vma) 0, | |
516 | input_bfd, input_section, rel->r_offset))) | |
517 | return false; | |
518 | } | |
519 | break; | |
520 | } | |
521 | } | |
522 | } | |
523 | ||
524 | return true; | |
525 | } | |
526 | ||
252b5132 RH |
527 | /* Actually perform a relocation as part of a final link. This can get |
528 | rather hairy when linker stubs are needed. */ | |
529 | ||
530 | static bfd_reloc_status_type | |
531 | elf32_hppa_bfd_final_link_relocate (howto, input_bfd, output_bfd, | |
532 | input_section, contents, offset, value, | |
533 | addend, info, sym_sec, sym_name, is_local) | |
534 | reloc_howto_type *howto; | |
535 | bfd *input_bfd; | |
5f771d47 | 536 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
537 | asection *input_section; |
538 | bfd_byte *contents; | |
539 | bfd_vma offset; | |
540 | bfd_vma value; | |
541 | bfd_vma addend; | |
542 | struct bfd_link_info *info; | |
543 | asection *sym_sec; | |
544 | const char *sym_name; | |
545 | int is_local; | |
546 | { | |
547 | unsigned long insn; | |
548 | unsigned long r_type = howto->type; | |
549 | unsigned long r_format = howto->bitsize; | |
550 | unsigned long r_field = e_fsel; | |
551 | bfd_byte *hit_data = contents + offset; | |
552 | boolean r_pcrel = howto->pc_relative; | |
553 | ||
554 | insn = bfd_get_32 (input_bfd, hit_data); | |
555 | ||
556 | /* Make sure we have a value for $global$. FIXME isn't this effectively | |
557 | just like the gp pointer on MIPS? Can we use those routines for this | |
558 | purpose? */ | |
559 | if (!elf32_hppa_hash_table (info)->global_sym_defined) | |
560 | { | |
561 | struct elf_link_hash_entry *h; | |
562 | asection *sec; | |
563 | ||
564 | h = elf_link_hash_lookup (elf_hash_table (info), "$global$", false, | |
565 | false, false); | |
566 | ||
567 | /* If there isn't a $global$, then we're in deep trouble. */ | |
568 | if (h == NULL) | |
569 | return bfd_reloc_notsupported; | |
570 | ||
571 | /* If $global$ isn't a defined symbol, then we're still in deep | |
572 | trouble. */ | |
573 | if (h->root.type != bfd_link_hash_defined) | |
574 | return bfd_reloc_undefined; | |
575 | ||
576 | sec = h->root.u.def.section; | |
577 | elf32_hppa_hash_table (info)->global_value = (h->root.u.def.value | |
578 | + sec->output_section->vma | |
579 | + sec->output_offset); | |
580 | elf32_hppa_hash_table (info)->global_sym_defined = 1; | |
581 | } | |
582 | ||
583 | switch (r_type) | |
584 | { | |
585 | case R_PARISC_NONE: | |
586 | break; | |
587 | ||
588 | case R_PARISC_DIR32: | |
589 | case R_PARISC_DIR17F: | |
590 | case R_PARISC_PCREL17C: | |
591 | r_field = e_fsel; | |
592 | goto do_basic_type_1; | |
593 | case R_PARISC_DIR21L: | |
594 | case R_PARISC_PCREL21L: | |
595 | r_field = e_lrsel; | |
596 | goto do_basic_type_1; | |
597 | case R_PARISC_DIR17R: | |
598 | case R_PARISC_PCREL17R: | |
599 | case R_PARISC_DIR14R: | |
600 | case R_PARISC_PCREL14R: | |
601 | r_field = e_rrsel; | |
602 | goto do_basic_type_1; | |
603 | ||
604 | /* For all the DP relative relocations, we need to examine the symbol's | |
605 | section. If it's a code section, then "data pointer relative" makes | |
606 | no sense. In that case we don't adjust the "value", and for 21 bit | |
607 | addil instructions, we change the source addend register from %dp to | |
608 | %r0. */ | |
609 | case R_PARISC_DPREL21L: | |
610 | r_field = e_lrsel; | |
611 | if (sym_sec->flags & SEC_CODE) | |
612 | { | |
613 | if ((insn & 0xfc000000) >> 26 == 0xa | |
614 | && (insn & 0x03e00000) >> 21 == 0x1b) | |
615 | insn &= ~0x03e00000; | |
616 | } | |
617 | else | |
618 | value -= elf32_hppa_hash_table (info)->global_value; | |
619 | goto do_basic_type_1; | |
620 | case R_PARISC_DPREL14R: | |
621 | r_field = e_rrsel; | |
622 | if ((sym_sec->flags & SEC_CODE) == 0) | |
623 | value -= elf32_hppa_hash_table (info)->global_value; | |
624 | goto do_basic_type_1; | |
625 | case R_PARISC_DPREL14F: | |
626 | r_field = e_fsel; | |
627 | if ((sym_sec->flags & SEC_CODE) == 0) | |
628 | value -= elf32_hppa_hash_table (info)->global_value; | |
629 | goto do_basic_type_1; | |
630 | ||
631 | /* These cases are separate as they may involve a lot more work | |
632 | to deal with linker stubs. */ | |
633 | case R_PARISC_PLABEL32: | |
634 | case R_PARISC_PLABEL21L: | |
635 | case R_PARISC_PLABEL14R: | |
636 | case R_PARISC_PCREL17F: | |
637 | { | |
638 | bfd_vma location; | |
e049a0de | 639 | unsigned int len; |
252b5132 RH |
640 | char *new_name, *stub_name; |
641 | ||
642 | /* Get the field selector right. We'll need it in a minute. */ | |
643 | if (r_type == R_PARISC_PCREL17F | |
644 | || r_type == R_PARISC_PLABEL32) | |
645 | r_field = e_fsel; | |
646 | else if (r_type == R_PARISC_PLABEL21L) | |
647 | r_field = e_lrsel; | |
648 | else if (r_type == R_PARISC_PLABEL14R) | |
649 | r_field = e_rrsel; | |
650 | ||
651 | /* Find out where we are and where we're going. */ | |
652 | location = (offset + | |
653 | input_section->output_offset + | |
654 | input_section->output_section->vma); | |
655 | ||
252b5132 RH |
656 | len = strlen (sym_name) + 1; |
657 | if (is_local) | |
658 | len += 9; | |
659 | new_name = bfd_malloc (len); | |
660 | if (!new_name) | |
661 | return bfd_reloc_notsupported; | |
662 | strcpy (new_name, sym_name); | |
663 | ||
664 | /* Local symbols have unique IDs. */ | |
665 | if (is_local) | |
666 | sprintf (new_name + len - 10, "_%08x", (int)sym_sec); | |
667 | ||
252b5132 RH |
668 | /* Any kind of linker stub needed? */ |
669 | if (((int)(value - location) > 0x3ffff) | |
31bd8f25 | 670 | || ((int)(value - location) < (int)0xfffc0000)) |
252b5132 RH |
671 | { |
672 | struct elf32_hppa_stub_hash_table *stub_hash_table; | |
673 | struct elf32_hppa_stub_hash_entry *stub_hash; | |
674 | asection *stub_section; | |
675 | ||
676 | /* Build a name for the stub. */ | |
677 | ||
678 | len = strlen (new_name); | |
679 | len += 23; | |
680 | stub_name = bfd_malloc (len); | |
681 | if (!stub_name) | |
682 | return bfd_reloc_notsupported; | |
31bd8f25 | 683 | elf32_hppa_name_of_stub (location, value, stub_name); |
252b5132 RH |
684 | strcat (stub_name, new_name); |
685 | free (new_name); | |
686 | ||
687 | stub_hash_table = elf32_hppa_hash_table (info)->stub_hash_table; | |
688 | ||
689 | stub_hash | |
690 | = elf32_hppa_stub_hash_lookup (stub_hash_table, stub_name, | |
691 | false, false); | |
692 | ||
693 | /* We're done with that name. */ | |
694 | free (stub_name); | |
695 | ||
696 | /* The stub BFD only has one section. */ | |
697 | stub_section = stub_hash_table->stub_bfd->sections; | |
698 | ||
699 | if (stub_hash != NULL) | |
700 | { | |
252b5132 RH |
701 | if (r_type == R_PARISC_PCREL17F) |
702 | { | |
703 | unsigned long delay_insn; | |
704 | unsigned int opcode, rtn_reg, ldo_target_reg, ldo_src_reg; | |
705 | ||
706 | /* We'll need to peek at the next insn. */ | |
707 | delay_insn = bfd_get_32 (input_bfd, hit_data + 4); | |
708 | opcode = get_opcode (delay_insn); | |
709 | ||
710 | /* We also need to know the return register for this | |
711 | call. */ | |
712 | rtn_reg = (insn & 0x03e00000) >> 21; | |
713 | ||
714 | ldo_src_reg = (delay_insn & 0x03e00000) >> 21; | |
715 | ldo_target_reg = (delay_insn & 0x001f0000) >> 16; | |
716 | ||
717 | /* Munge up the value and other parameters for | |
718 | hppa_elf_relocate_insn. */ | |
719 | ||
720 | value = (stub_hash->offset | |
721 | + stub_section->output_offset | |
722 | + stub_section->output_section->vma); | |
723 | ||
724 | r_format = 17; | |
725 | r_field = e_fsel; | |
726 | r_pcrel = 0; | |
727 | addend = 0; | |
728 | ||
729 | /* We need to peek at the delay insn and determine if | |
730 | we'll need to swap the branch and its delay insn. */ | |
731 | if ((insn & 2) | |
732 | || (opcode == LDO | |
733 | && ldo_target_reg == rtn_reg) | |
734 | || (delay_insn == 0x08000240)) | |
735 | { | |
736 | /* No need to swap the branch and its delay slot, but | |
737 | we do need to make sure to jump past the return | |
738 | pointer update in the stub. */ | |
739 | value += 4; | |
740 | ||
741 | /* If the delay insn does a return pointer adjustment, | |
742 | then we have to make sure it stays valid. */ | |
743 | if (opcode == LDO | |
744 | && ldo_target_reg == rtn_reg) | |
745 | { | |
746 | delay_insn &= 0xfc00ffff; | |
747 | delay_insn |= ((31 << 21) | (31 << 16)); | |
748 | bfd_put_32 (input_bfd, delay_insn, hit_data + 4); | |
749 | } | |
750 | /* Use a BLE to reach the stub. */ | |
751 | insn = BLE_SR4_R0; | |
752 | } | |
753 | else | |
754 | { | |
755 | /* Wonderful, we have to swap the call insn and its | |
756 | delay slot. */ | |
757 | bfd_put_32 (input_bfd, delay_insn, hit_data); | |
758 | /* Use a BLE,n to reach the stub. */ | |
759 | insn = (BLE_SR4_R0 | 0x2); | |
760 | bfd_put_32 (input_bfd, insn, hit_data + 4); | |
761 | insn = hppa_elf_relocate_insn (input_bfd, | |
762 | input_section, | |
763 | insn, offset + 4, | |
764 | value, addend, | |
765 | r_format, r_field, | |
766 | r_pcrel); | |
767 | /* Update the instruction word. */ | |
768 | bfd_put_32 (input_bfd, insn, hit_data + 4); | |
769 | return bfd_reloc_dangerous; | |
770 | } | |
771 | } | |
31bd8f25 JL |
772 | else |
773 | return bfd_reloc_notsupported; | |
774 | } | |
252b5132 RH |
775 | } |
776 | goto do_basic_type_1; | |
777 | } | |
778 | ||
779 | do_basic_type_1: | |
780 | insn = hppa_elf_relocate_insn (input_bfd, input_section, insn, | |
781 | offset, value, addend, r_format, | |
782 | r_field, r_pcrel); | |
783 | break; | |
784 | ||
785 | /* Something we don't know how to handle. */ | |
786 | default: | |
787 | return bfd_reloc_notsupported; | |
788 | } | |
789 | ||
790 | /* Update the instruction word. */ | |
791 | bfd_put_32 (input_bfd, insn, hit_data); | |
792 | return (bfd_reloc_ok); | |
793 | } | |
794 | ||
252b5132 RH |
795 | /* Return true if SYM represents a local label symbol. */ |
796 | ||
797 | static boolean | |
798 | hppa_elf_is_local_label_name (abfd, name) | |
5f771d47 | 799 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
800 | const char *name; |
801 | { | |
802 | return (name[0] == 'L' && name[1] == '$'); | |
803 | } | |
804 | ||
252b5132 RH |
805 | /* Undo the generic ELF code's subtraction of section->vma from the |
806 | value of each external symbol. */ | |
807 | ||
808 | static boolean | |
809 | elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) | |
5f771d47 ILT |
810 | bfd *abfd ATTRIBUTE_UNUSED; |
811 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
812 | const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED; | |
813 | const char **namep ATTRIBUTE_UNUSED; | |
814 | flagword *flagsp ATTRIBUTE_UNUSED; | |
252b5132 RH |
815 | asection **secp; |
816 | bfd_vma *valp; | |
817 | { | |
818 | *valp += (*secp)->vma; | |
819 | return true; | |
820 | } | |
821 | ||
822 | /* Determine the name of the stub needed to perform a call assuming the | |
823 | argument relocation bits for caller and callee are in CALLER and CALLEE | |
824 | for a call from LOCATION to DESTINATION. Copy the name into STUB_NAME. */ | |
825 | ||
826 | static void | |
31bd8f25 | 827 | elf32_hppa_name_of_stub (location, destination, stub_name) |
5f771d47 ILT |
828 | bfd_vma location ATTRIBUTE_UNUSED; |
829 | bfd_vma destination ATTRIBUTE_UNUSED; | |
252b5132 RH |
830 | char *stub_name; |
831 | { | |
31bd8f25 | 832 | strcpy (stub_name, "_____long_branch_stub_"); |
252b5132 RH |
833 | } |
834 | ||
835 | /* Compute the size of the stub needed to call from LOCATION to DESTINATION | |
836 | (a function named SYM_NAME), with argument relocation bits CALLER and | |
837 | CALLEE. Return zero if no stub is needed to perform such a call. */ | |
838 | ||
839 | static unsigned int | |
31bd8f25 | 840 | elf32_hppa_size_of_stub (location, destination, sym_name) |
252b5132 RH |
841 | bfd_vma location, destination; |
842 | const char *sym_name; | |
843 | { | |
31bd8f25 | 844 | /* Determine if a long branch stub is needed. */ |
252b5132 | 845 | if (!(((int)(location - destination) > 0x3ffff) |
31bd8f25 | 846 | || ((int)(location - destination) < (int)0xfffc0000))) |
252b5132 RH |
847 | return 0; |
848 | ||
31bd8f25 | 849 | if (!strncmp ("$$", sym_name, 2) |
252b5132 RH |
850 | && strcmp ("$$dyncall", sym_name)) |
851 | return 12; | |
852 | else | |
853 | return 16; | |
854 | } | |
855 | ||
856 | /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY. | |
857 | IN_ARGS contains the stub BFD and link info pointers. */ | |
858 | ||
859 | static boolean | |
860 | elf32_hppa_build_one_stub (gen_entry, in_args) | |
861 | struct bfd_hash_entry *gen_entry; | |
862 | PTR in_args; | |
863 | { | |
864 | void **args = (void **)in_args; | |
865 | bfd *stub_bfd = (bfd *)args[0]; | |
866 | struct bfd_link_info *info = (struct bfd_link_info *)args[1]; | |
867 | struct elf32_hppa_stub_hash_entry *entry; | |
868 | struct elf32_hppa_stub_hash_table *stub_hash_table; | |
869 | bfd_byte *loc; | |
870 | symvalue sym_value; | |
871 | const char *sym_name; | |
872 | ||
873 | /* Initialize pointers to the stub hash table, the particular entry we | |
874 | are building a stub for, and where (in memory) we should place the stub | |
875 | instructions. */ | |
876 | entry = (struct elf32_hppa_stub_hash_entry *)gen_entry; | |
877 | stub_hash_table = elf32_hppa_hash_table(info)->stub_hash_table; | |
878 | loc = stub_hash_table->location; | |
879 | ||
880 | /* Make a note of the offset within the stubs for this entry. */ | |
881 | entry->offset = stub_hash_table->offset; | |
882 | ||
883 | /* The symbol's name starts at offset 22. */ | |
884 | sym_name = entry->root.string + 22; | |
885 | ||
886 | sym_value = (entry->target_value | |
887 | + entry->target_section->output_offset | |
888 | + entry->target_section->output_section->vma); | |
889 | ||
31bd8f25 | 890 | if (1) |
252b5132 RH |
891 | { |
892 | /* Create one of two variant long branch stubs. One for $$dyncall and | |
893 | normal calls, the other for calls to millicode. */ | |
894 | unsigned long insn; | |
895 | int millicode_call = 0; | |
896 | ||
897 | if (!strncmp ("$$", sym_name, 2) && strcmp ("$$dyncall", sym_name)) | |
898 | millicode_call = 1; | |
899 | ||
900 | /* First the return pointer adjustment. Depending on exact calling | |
901 | sequence this instruction may be skipped. */ | |
902 | bfd_put_32 (stub_bfd, LDO_M4_R31_R31, loc); | |
903 | ||
904 | /* The next two instructions are the long branch itself. A long branch | |
905 | is formed with "ldil" loading the upper bits of the target address | |
906 | into a register, then branching with "be" which adds in the lower bits. | |
907 | Long branches to millicode nullify the delay slot of the "be". */ | |
908 | insn = hppa_rebuild_insn (stub_bfd, LDIL_R1, | |
909 | hppa_field_adjust (sym_value, 0, e_lrsel), 21); | |
910 | bfd_put_32 (stub_bfd, insn, loc + 4); | |
911 | insn = hppa_rebuild_insn (stub_bfd, BE_SR4_R1 | (millicode_call ? 2 : 0), | |
912 | hppa_field_adjust (sym_value, 0, e_rrsel) >> 2, | |
913 | 17); | |
914 | bfd_put_32 (stub_bfd, insn, loc + 8); | |
915 | ||
916 | if (!millicode_call) | |
917 | { | |
918 | /* The sequence to call this stub places the return pointer into %r31, | |
919 | the final target expects the return pointer in %r2, so copy the | |
920 | return pointer into the proper register. */ | |
921 | bfd_put_32 (stub_bfd, COPY_R31_R2, loc + 12); | |
922 | ||
923 | /* Update the location and offsets. */ | |
924 | stub_hash_table->location += 16; | |
925 | stub_hash_table->offset += 16; | |
926 | } | |
927 | else | |
928 | { | |
929 | /* Update the location and offsets. */ | |
930 | stub_hash_table->location += 12; | |
931 | stub_hash_table->offset += 12; | |
932 | } | |
933 | ||
934 | } | |
935 | return true; | |
936 | } | |
937 | ||
938 | /* External entry points for sizing and building linker stubs. */ | |
939 | ||
940 | /* Build all the stubs associated with the current output file. The | |
941 | stubs are kept in a hash table attached to the main linker hash | |
942 | table. This is called via hppaelf_finish in the linker. */ | |
943 | ||
944 | boolean | |
945 | elf32_hppa_build_stubs (stub_bfd, info) | |
946 | bfd *stub_bfd; | |
947 | struct bfd_link_info *info; | |
948 | { | |
949 | /* The stub BFD only has one section. */ | |
950 | asection *stub_sec = stub_bfd->sections; | |
951 | struct elf32_hppa_stub_hash_table *table; | |
952 | unsigned int size; | |
953 | void *args[2]; | |
954 | ||
955 | /* So we can pass both the BFD for the stubs and the link info | |
956 | structure to the routine which actually builds stubs. */ | |
957 | args[0] = stub_bfd; | |
958 | args[1] = info; | |
959 | ||
960 | /* Allocate memory to hold the linker stubs. */ | |
961 | size = bfd_section_size (stub_bfd, stub_sec); | |
962 | stub_sec->contents = (unsigned char *) bfd_zalloc (stub_bfd, size); | |
963 | if (stub_sec->contents == NULL) | |
964 | return false; | |
965 | table = elf32_hppa_hash_table(info)->stub_hash_table; | |
966 | table->location = stub_sec->contents; | |
967 | ||
968 | /* Build the stubs as directed by the stub hash table. */ | |
969 | elf32_hppa_stub_hash_traverse (table, elf32_hppa_build_one_stub, args); | |
970 | ||
971 | return true; | |
972 | } | |
973 | ||
974 | /* Determine and set the size of the stub section for a final link. | |
975 | ||
976 | The basic idea here is to examine all the relocations looking for | |
977 | PC-relative calls to a target that is unreachable with a "bl" | |
978 | instruction or calls where the caller and callee disagree on the | |
979 | location of their arguments or return value. */ | |
980 | ||
981 | boolean | |
982 | elf32_hppa_size_stubs (stub_bfd, output_bfd, link_info) | |
983 | bfd *stub_bfd; | |
5f771d47 | 984 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
985 | struct bfd_link_info *link_info; |
986 | { | |
987 | bfd *input_bfd; | |
988 | asection *section, *stub_sec = 0; | |
989 | Elf_Internal_Shdr *symtab_hdr; | |
e049a0de | 990 | Elf_Internal_Sym *local_syms, **all_local_syms; |
252b5132 RH |
991 | unsigned int i, index, bfd_count = 0; |
992 | struct elf32_hppa_stub_hash_table *stub_hash_table = 0; | |
252b5132 RH |
993 | |
994 | /* Create and initialize the stub hash table. */ | |
995 | stub_hash_table = ((struct elf32_hppa_stub_hash_table *) | |
996 | bfd_malloc (sizeof (struct elf32_hppa_stub_hash_table))); | |
997 | if (!stub_hash_table) | |
998 | goto error_return; | |
999 | ||
1000 | if (!elf32_hppa_stub_hash_table_init (stub_hash_table, stub_bfd, | |
1001 | elf32_hppa_stub_hash_newfunc)) | |
1002 | goto error_return; | |
1003 | ||
252b5132 RH |
1004 | /* Attach the hash tables to the main hash table. */ |
1005 | elf32_hppa_hash_table(link_info)->stub_hash_table = stub_hash_table; | |
252b5132 RH |
1006 | |
1007 | /* Count the number of input BFDs. */ | |
1008 | for (input_bfd = link_info->input_bfds; | |
1009 | input_bfd != NULL; | |
1010 | input_bfd = input_bfd->link_next) | |
1011 | bfd_count++; | |
1012 | ||
252b5132 RH |
1013 | /* Magic as we know the stub bfd only has one section. */ |
1014 | stub_sec = stub_bfd->sections; | |
1015 | ||
1016 | /* If generating a relocateable output file, then we don't | |
1017 | have to examine the relocs. */ | |
1018 | if (link_info->relocateable) | |
1019 | { | |
1020 | for (i = 0; i < bfd_count; i++) | |
1021 | if (all_local_syms[i]) | |
1022 | free (all_local_syms[i]); | |
1023 | free (all_local_syms); | |
1024 | return true; | |
1025 | } | |
1026 | ||
1027 | /* Now that we have argument location information for all the global | |
1028 | functions we can start looking for stubs. */ | |
1029 | for (input_bfd = link_info->input_bfds, index = 0; | |
1030 | input_bfd != NULL; | |
1031 | input_bfd = input_bfd->link_next, index++) | |
1032 | { | |
1033 | /* We'll need the symbol table in a second. */ | |
1034 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1035 | if (symtab_hdr->sh_info == 0) | |
1036 | continue; | |
1037 | ||
1038 | local_syms = all_local_syms[index]; | |
1039 | ||
1040 | /* Walk over each section attached to the input bfd. */ | |
1041 | for (section = input_bfd->sections; | |
1042 | section != NULL; | |
1043 | section = section->next) | |
1044 | { | |
1045 | Elf_Internal_Shdr *input_rel_hdr; | |
1046 | Elf32_External_Rela *external_relocs, *erelaend, *erela; | |
1047 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
1048 | ||
1049 | /* If there aren't any relocs, then there's nothing to do. */ | |
1050 | if ((section->flags & SEC_RELOC) == 0 | |
1051 | || section->reloc_count == 0) | |
1052 | continue; | |
1053 | ||
1054 | /* Allocate space for the external relocations. */ | |
1055 | external_relocs | |
1056 | = ((Elf32_External_Rela *) | |
1057 | bfd_malloc (section->reloc_count | |
1058 | * sizeof (Elf32_External_Rela))); | |
1059 | if (external_relocs == NULL) | |
1060 | { | |
1061 | for (i = 0; i < bfd_count; i++) | |
1062 | if (all_local_syms[i]) | |
1063 | free (all_local_syms[i]); | |
1064 | free (all_local_syms); | |
1065 | goto error_return; | |
1066 | } | |
1067 | ||
1068 | /* Likewise for the internal relocations. */ | |
1069 | internal_relocs | |
1070 | = ((Elf_Internal_Rela *) | |
1071 | bfd_malloc (section->reloc_count * sizeof (Elf_Internal_Rela))); | |
1072 | if (internal_relocs == NULL) | |
1073 | { | |
1074 | free (external_relocs); | |
1075 | for (i = 0; i < bfd_count; i++) | |
1076 | if (all_local_syms[i]) | |
1077 | free (all_local_syms[i]); | |
1078 | free (all_local_syms); | |
1079 | goto error_return; | |
1080 | } | |
1081 | ||
1082 | /* Read in the external relocs. */ | |
1083 | input_rel_hdr = &elf_section_data (section)->rel_hdr; | |
1084 | if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0 | |
1085 | || bfd_read (external_relocs, 1, input_rel_hdr->sh_size, | |
1086 | input_bfd) != input_rel_hdr->sh_size) | |
1087 | { | |
1088 | free (external_relocs); | |
1089 | free (internal_relocs); | |
1090 | for (i = 0; i < bfd_count; i++) | |
1091 | if (all_local_syms[i]) | |
1092 | free (all_local_syms[i]); | |
1093 | free (all_local_syms); | |
1094 | goto error_return; | |
1095 | } | |
1096 | ||
1097 | /* Swap in the relocs. */ | |
1098 | erela = external_relocs; | |
1099 | erelaend = erela + section->reloc_count; | |
1100 | irela = internal_relocs; | |
1101 | for (; erela < erelaend; erela++, irela++) | |
1102 | bfd_elf32_swap_reloca_in (input_bfd, erela, irela); | |
1103 | ||
1104 | /* We're done with the external relocs, free them. */ | |
1105 | free (external_relocs); | |
1106 | ||
1107 | /* Now examine each relocation. */ | |
1108 | irela = internal_relocs; | |
1109 | irelaend = irela + section->reloc_count; | |
1110 | for (; irela < irelaend; irela++) | |
1111 | { | |
31bd8f25 | 1112 | long r_type, size_of_stub; |
252b5132 RH |
1113 | unsigned long r_index; |
1114 | struct elf_link_hash_entry *hash; | |
1115 | struct elf32_hppa_stub_hash_entry *stub_hash; | |
252b5132 RH |
1116 | Elf_Internal_Sym *sym; |
1117 | asection *sym_sec; | |
1118 | const char *sym_name; | |
1119 | symvalue sym_value; | |
1120 | bfd_vma location, destination; | |
1121 | char *new_name = NULL; | |
1122 | ||
1123 | r_type = ELF32_R_TYPE (irela->r_info); | |
1124 | r_index = ELF32_R_SYM (irela->r_info); | |
1125 | ||
1126 | if (r_type < 0 || r_type >= (int) R_PARISC_UNIMPLEMENTED) | |
1127 | { | |
1128 | bfd_set_error (bfd_error_bad_value); | |
1129 | free (internal_relocs); | |
1130 | for (i = 0; i < bfd_count; i++) | |
1131 | if (all_local_syms[i]) | |
1132 | free (all_local_syms[i]); | |
1133 | free (all_local_syms); | |
1134 | goto error_return; | |
1135 | } | |
1136 | ||
1137 | /* Only look for stubs on call instructions or plabel | |
1138 | references. */ | |
1139 | if (r_type != R_PARISC_PCREL17F | |
1140 | && r_type != R_PARISC_PLABEL32 | |
1141 | && r_type != R_PARISC_PLABEL21L | |
1142 | && r_type != R_PARISC_PLABEL14R) | |
1143 | continue; | |
1144 | ||
1145 | /* Now determine the call target, its name, value, section | |
1146 | and argument relocation bits. */ | |
1147 | hash = NULL; | |
1148 | sym = NULL; | |
1149 | sym_sec = NULL; | |
1150 | if (r_index < symtab_hdr->sh_info) | |
1151 | { | |
1152 | /* It's a local symbol. */ | |
1153 | Elf_Internal_Shdr *hdr; | |
1154 | ||
1155 | sym = local_syms + r_index; | |
1156 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
1157 | sym_sec = hdr->bfd_section; | |
1158 | sym_name = bfd_elf_string_from_elf_section (input_bfd, | |
1159 | symtab_hdr->sh_link, | |
1160 | sym->st_name); | |
1161 | sym_value = (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
1162 | ? 0 : sym->st_value); | |
1163 | destination = (sym_value | |
1164 | + sym_sec->output_offset | |
1165 | + sym_sec->output_section->vma); | |
1166 | ||
1167 | /* Tack on an ID so we can uniquely identify this local | |
1168 | symbol in the stub or arg info hash tables. */ | |
1169 | new_name = bfd_malloc (strlen (sym_name) + 10); | |
1170 | if (new_name == 0) | |
1171 | { | |
1172 | free (internal_relocs); | |
1173 | for (i = 0; i < bfd_count; i++) | |
1174 | if (all_local_syms[i]) | |
1175 | free (all_local_syms[i]); | |
1176 | free (all_local_syms); | |
1177 | goto error_return; | |
1178 | } | |
1179 | sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec); | |
1180 | sym_name = new_name; | |
1181 | } | |
1182 | else | |
1183 | { | |
1184 | /* It's an external symbol. */ | |
1185 | long index; | |
1186 | ||
1187 | index = r_index - symtab_hdr->sh_info; | |
1188 | hash = elf_sym_hashes (input_bfd)[index]; | |
1189 | if (hash->root.type == bfd_link_hash_defined | |
1190 | || hash->root.type == bfd_link_hash_defweak) | |
1191 | { | |
1192 | sym_sec = hash->root.u.def.section; | |
1193 | sym_name = hash->root.root.string; | |
1194 | sym_value = hash->root.u.def.value; | |
1195 | destination = (sym_value | |
1196 | + sym_sec->output_offset | |
1197 | + sym_sec->output_section->vma); | |
1198 | } | |
1199 | else | |
1200 | { | |
1201 | bfd_set_error (bfd_error_bad_value); | |
1202 | free (internal_relocs); | |
1203 | for (i = 0; i < bfd_count; i++) | |
1204 | if (all_local_syms[i]) | |
1205 | free (all_local_syms[i]); | |
1206 | free (all_local_syms); | |
1207 | goto error_return; | |
1208 | } | |
1209 | } | |
1210 | ||
252b5132 RH |
1211 | /* Now determine where the call point is. */ |
1212 | location = (section->output_offset | |
1213 | + section->output_section->vma | |
1214 | + irela->r_offset); | |
1215 | ||
1216 | /* We only care about the destination for PCREL function | |
1217 | calls (eg. we don't care for PLABELS). */ | |
1218 | if (r_type != R_PARISC_PCREL17F) | |
1219 | location = destination; | |
1220 | ||
1221 | /* Determine what (if any) linker stub is needed and its | |
1222 | size (in bytes). */ | |
31bd8f25 | 1223 | size_of_stub = elf32_hppa_size_of_stub (location, |
252b5132 RH |
1224 | destination, |
1225 | sym_name); | |
1226 | if (size_of_stub != 0) | |
1227 | { | |
1228 | char *stub_name; | |
1229 | unsigned int len; | |
1230 | ||
1231 | /* Get the name of this stub. */ | |
1232 | len = strlen (sym_name); | |
1233 | len += 23; | |
1234 | ||
1235 | stub_name = bfd_malloc (len); | |
1236 | if (!stub_name) | |
1237 | { | |
1238 | /* Because sym_name was mallocd above for local | |
1239 | symbols. */ | |
1240 | if (r_index < symtab_hdr->sh_info) | |
1241 | free (new_name); | |
1242 | ||
1243 | free (internal_relocs); | |
1244 | for (i = 0; i < bfd_count; i++) | |
1245 | if (all_local_syms[i]) | |
1246 | free (all_local_syms[i]); | |
1247 | free (all_local_syms); | |
1248 | goto error_return; | |
1249 | } | |
31bd8f25 | 1250 | elf32_hppa_name_of_stub (location, destination, stub_name); |
252b5132 RH |
1251 | strcat (stub_name + 22, sym_name); |
1252 | ||
1253 | /* Because sym_name was malloced above for local symbols. */ | |
1254 | if (r_index < symtab_hdr->sh_info) | |
1255 | free (new_name); | |
1256 | ||
1257 | stub_hash | |
1258 | = elf32_hppa_stub_hash_lookup (stub_hash_table, stub_name, | |
1259 | false, false); | |
1260 | if (stub_hash != NULL) | |
1261 | { | |
1262 | /* The proper stub has already been created, nothing | |
1263 | else to do. */ | |
1264 | free (stub_name); | |
1265 | } | |
1266 | else | |
1267 | { | |
1268 | bfd_set_section_size (stub_bfd, stub_sec, | |
1269 | (bfd_section_size (stub_bfd, | |
1270 | stub_sec) | |
1271 | + size_of_stub)); | |
1272 | ||
1273 | /* Enter this entry into the linker stub hash table. */ | |
1274 | stub_hash | |
1275 | = elf32_hppa_stub_hash_lookup (stub_hash_table, | |
1276 | stub_name, true, true); | |
1277 | if (stub_hash == NULL) | |
1278 | { | |
1279 | free (stub_name); | |
1280 | free (internal_relocs); | |
1281 | for (i = 0; i < bfd_count; i++) | |
1282 | if (all_local_syms[i]) | |
1283 | free (all_local_syms[i]); | |
1284 | free (all_local_syms); | |
1285 | goto error_return; | |
1286 | } | |
1287 | ||
1288 | /* We'll need these to determine the address that the | |
1289 | stub will branch to. */ | |
1290 | stub_hash->target_value = sym_value; | |
1291 | stub_hash->target_section = sym_sec; | |
1292 | } | |
1293 | free (stub_name); | |
1294 | } | |
1295 | } | |
1296 | /* We're done with the internal relocs, free them. */ | |
1297 | free (internal_relocs); | |
1298 | } | |
1299 | } | |
1300 | /* We're done with the local symbols, free them. */ | |
1301 | for (i = 0; i < bfd_count; i++) | |
1302 | if (all_local_syms[i]) | |
1303 | free (all_local_syms[i]); | |
1304 | free (all_local_syms); | |
1305 | return true; | |
1306 | ||
1307 | error_return: | |
1308 | /* Return gracefully, avoiding dangling references to the hash tables. */ | |
1309 | if (stub_hash_table) | |
1310 | { | |
1311 | elf32_hppa_hash_table(link_info)->stub_hash_table = NULL; | |
1312 | free (stub_hash_table); | |
1313 | } | |
252b5132 RH |
1314 | /* Set the size of the stub section to zero since we're never going |
1315 | to create them. Avoids losing when we try to get its contents | |
1316 | too. */ | |
1317 | bfd_set_section_size (stub_bfd, stub_sec, 0); | |
1318 | return false; | |
1319 | } | |
1320 | ||
1321 | /* Misc BFD support code. */ | |
1322 | #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup | |
1323 | #define bfd_elf32_bfd_is_local_label_name hppa_elf_is_local_label_name | |
9e103c9c JL |
1324 | #define elf_info_to_howto elf_hppa_info_to_howto |
1325 | #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel | |
252b5132 | 1326 | |
252b5132 RH |
1327 | /* Stuff for the BFD linker. */ |
1328 | #define elf_backend_relocate_section elf32_hppa_relocate_section | |
1329 | #define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook | |
252b5132 RH |
1330 | #define bfd_elf32_bfd_link_hash_table_create \ |
1331 | elf32_hppa_link_hash_table_create | |
1332 | ||
1333 | #define TARGET_BIG_SYM bfd_elf32_hppa_vec | |
1334 | #define TARGET_BIG_NAME "elf32-hppa" | |
1335 | #define ELF_ARCH bfd_arch_hppa | |
1336 | #define ELF_MACHINE_CODE EM_PARISC | |
1337 | #define ELF_MAXPAGESIZE 0x1000 | |
1338 | ||
1339 | #include "elf32-target.h" |