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1 | /* BFD back-end for HP PA-RISC ELF files. | |
2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001, | |
3 | 2002, 2003 Free Software Foundation, Inc. | |
4 | ||
5 | Original code by | |
6 | Center for Software Science | |
7 | Department of Computer Science | |
8 | University of Utah | |
9 | Largely rewritten by Alan Modra <alan@linuxcare.com.au> | |
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" | |
29 | #include "libbfd.h" | |
30 | #include "elf-bfd.h" | |
31 | #include "elf/hppa.h" | |
32 | #include "libhppa.h" | |
33 | #include "elf32-hppa.h" | |
34 | #define ARCH_SIZE 32 | |
35 | #include "elf32-hppa.h" | |
36 | #include "elf-hppa.h" | |
37 | ||
38 | /* In order to gain some understanding of code in this file without | |
39 | knowing all the intricate details of the linker, note the | |
40 | following: | |
41 | ||
42 | Functions named elf32_hppa_* are called by external routines, other | |
43 | functions are only called locally. elf32_hppa_* functions appear | |
44 | in this file more or less in the order in which they are called | |
45 | from external routines. eg. elf32_hppa_check_relocs is called | |
46 | early in the link process, elf32_hppa_finish_dynamic_sections is | |
47 | one of the last functions. */ | |
48 | ||
49 | /* We use two hash tables to hold information for linking PA ELF objects. | |
50 | ||
51 | The first is the elf32_hppa_link_hash_table which is derived | |
52 | from the standard ELF linker hash table. We use this as a place to | |
53 | attach other hash tables and static information. | |
54 | ||
55 | The second is the stub hash table which is derived from the | |
56 | base BFD hash table. The stub hash table holds the information | |
57 | necessary to build the linker stubs during a link. | |
58 | ||
59 | There are a number of different stubs generated by the linker. | |
60 | ||
61 | Long branch stub: | |
62 | : ldil LR'X,%r1 | |
63 | : be,n RR'X(%sr4,%r1) | |
64 | ||
65 | PIC long branch stub: | |
66 | : b,l .+8,%r1 | |
67 | : addil LR'X - ($PIC_pcrel$0 - 4),%r1 | |
68 | : be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1) | |
69 | ||
70 | Import stub to call shared library routine from normal object file | |
71 | (single sub-space version) | |
72 | : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point | |
73 | : ldw RR'lt_ptr+ltoff(%r1),%r21 | |
74 | : bv %r0(%r21) | |
75 | : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. | |
76 | ||
77 | Import stub to call shared library routine from shared library | |
78 | (single sub-space version) | |
79 | : addil LR'ltoff,%r19 ; get procedure entry point | |
80 | : ldw RR'ltoff(%r1),%r21 | |
81 | : bv %r0(%r21) | |
82 | : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. | |
83 | ||
84 | Import stub to call shared library routine from normal object file | |
85 | (multiple sub-space support) | |
86 | : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point | |
87 | : ldw RR'lt_ptr+ltoff(%r1),%r21 | |
88 | : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. | |
89 | : ldsid (%r21),%r1 | |
90 | : mtsp %r1,%sr0 | |
91 | : be 0(%sr0,%r21) ; branch to target | |
92 | : stw %rp,-24(%sp) ; save rp | |
93 | ||
94 | Import stub to call shared library routine from shared library | |
95 | (multiple sub-space support) | |
96 | : addil LR'ltoff,%r19 ; get procedure entry point | |
97 | : ldw RR'ltoff(%r1),%r21 | |
98 | : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. | |
99 | : ldsid (%r21),%r1 | |
100 | : mtsp %r1,%sr0 | |
101 | : be 0(%sr0,%r21) ; branch to target | |
102 | : stw %rp,-24(%sp) ; save rp | |
103 | ||
104 | Export stub to return from shared lib routine (multiple sub-space support) | |
105 | One of these is created for each exported procedure in a shared | |
106 | library (and stored in the shared lib). Shared lib routines are | |
107 | called via the first instruction in the export stub so that we can | |
108 | do an inter-space return. Not required for single sub-space. | |
109 | : bl,n X,%rp ; trap the return | |
110 | : nop | |
111 | : ldw -24(%sp),%rp ; restore the original rp | |
112 | : ldsid (%rp),%r1 | |
113 | : mtsp %r1,%sr0 | |
114 | : be,n 0(%sr0,%rp) ; inter-space return. */ | |
115 | ||
116 | #define PLT_ENTRY_SIZE 8 | |
117 | #define GOT_ENTRY_SIZE 4 | |
118 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" | |
119 | ||
120 | static const bfd_byte plt_stub[] = | |
121 | { | |
122 | 0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */ | |
123 | 0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */ | |
124 | 0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */ | |
125 | #define PLT_STUB_ENTRY (3*4) | |
126 | 0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */ | |
127 | 0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */ | |
128 | 0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */ | |
129 | 0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */ | |
130 | }; | |
131 | ||
132 | /* Section name for stubs is the associated section name plus this | |
133 | string. */ | |
134 | #define STUB_SUFFIX ".stub" | |
135 | ||
136 | /* We don't need to copy certain PC- or GP-relative dynamic relocs | |
137 | into a shared object's dynamic section. All the relocs of the | |
138 | limited class we are interested in, are absolute. */ | |
139 | #ifndef RELATIVE_DYNRELOCS | |
140 | #define RELATIVE_DYNRELOCS 0 | |
141 | #define IS_ABSOLUTE_RELOC(r_type) 1 | |
142 | #endif | |
143 | ||
144 | enum elf32_hppa_stub_type { | |
145 | hppa_stub_long_branch, | |
146 | hppa_stub_long_branch_shared, | |
147 | hppa_stub_import, | |
148 | hppa_stub_import_shared, | |
149 | hppa_stub_export, | |
150 | hppa_stub_none | |
151 | }; | |
152 | ||
153 | struct elf32_hppa_stub_hash_entry { | |
154 | ||
155 | /* Base hash table entry structure. */ | |
156 | struct bfd_hash_entry root; | |
157 | ||
158 | /* The stub section. */ | |
159 | asection *stub_sec; | |
160 | ||
161 | /* Offset within stub_sec of the beginning of this stub. */ | |
162 | bfd_vma stub_offset; | |
163 | ||
164 | /* Given the symbol's value and its section we can determine its final | |
165 | value when building the stubs (so the stub knows where to jump. */ | |
166 | bfd_vma target_value; | |
167 | asection *target_section; | |
168 | ||
169 | enum elf32_hppa_stub_type stub_type; | |
170 | ||
171 | /* The symbol table entry, if any, that this was derived from. */ | |
172 | struct elf32_hppa_link_hash_entry *h; | |
173 | ||
174 | /* Where this stub is being called from, or, in the case of combined | |
175 | stub sections, the first input section in the group. */ | |
176 | asection *id_sec; | |
177 | }; | |
178 | ||
179 | struct elf32_hppa_link_hash_entry { | |
180 | ||
181 | struct elf_link_hash_entry elf; | |
182 | ||
183 | /* A pointer to the most recently used stub hash entry against this | |
184 | symbol. */ | |
185 | struct elf32_hppa_stub_hash_entry *stub_cache; | |
186 | ||
187 | /* Used to count relocations for delayed sizing of relocation | |
188 | sections. */ | |
189 | struct elf32_hppa_dyn_reloc_entry { | |
190 | ||
191 | /* Next relocation in the chain. */ | |
192 | struct elf32_hppa_dyn_reloc_entry *next; | |
193 | ||
194 | /* The input section of the reloc. */ | |
195 | asection *sec; | |
196 | ||
197 | /* Number of relocs copied in this section. */ | |
198 | bfd_size_type count; | |
199 | ||
200 | #if RELATIVE_DYNRELOCS | |
201 | /* Number of relative relocs copied for the input section. */ | |
202 | bfd_size_type relative_count; | |
203 | #endif | |
204 | } *dyn_relocs; | |
205 | ||
206 | /* Set if the only reason we need a .plt entry is for a non-PIC to | |
207 | PIC function call. */ | |
208 | unsigned int pic_call:1; | |
209 | ||
210 | /* Set if this symbol is used by a plabel reloc. */ | |
211 | unsigned int plabel:1; | |
212 | }; | |
213 | ||
214 | struct elf32_hppa_link_hash_table { | |
215 | ||
216 | /* The main hash table. */ | |
217 | struct elf_link_hash_table elf; | |
218 | ||
219 | /* The stub hash table. */ | |
220 | struct bfd_hash_table stub_hash_table; | |
221 | ||
222 | /* Linker stub bfd. */ | |
223 | bfd *stub_bfd; | |
224 | ||
225 | /* Linker call-backs. */ | |
226 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); | |
227 | void (*layout_sections_again) PARAMS ((void)); | |
228 | ||
229 | /* Array to keep track of which stub sections have been created, and | |
230 | information on stub grouping. */ | |
231 | struct map_stub { | |
232 | /* This is the section to which stubs in the group will be | |
233 | attached. */ | |
234 | asection *link_sec; | |
235 | /* The stub section. */ | |
236 | asection *stub_sec; | |
237 | } *stub_group; | |
238 | ||
239 | /* Assorted information used by elf32_hppa_size_stubs. */ | |
240 | unsigned int bfd_count; | |
241 | int top_index; | |
242 | asection **input_list; | |
243 | Elf_Internal_Sym **all_local_syms; | |
244 | ||
245 | /* Short-cuts to get to dynamic linker sections. */ | |
246 | asection *sgot; | |
247 | asection *srelgot; | |
248 | asection *splt; | |
249 | asection *srelplt; | |
250 | asection *sdynbss; | |
251 | asection *srelbss; | |
252 | ||
253 | /* Used during a final link to store the base of the text and data | |
254 | segments so that we can perform SEGREL relocations. */ | |
255 | bfd_vma text_segment_base; | |
256 | bfd_vma data_segment_base; | |
257 | ||
258 | /* Whether we support multiple sub-spaces for shared libs. */ | |
259 | unsigned int multi_subspace:1; | |
260 | ||
261 | /* Flags set when various size branches are detected. Used to | |
262 | select suitable defaults for the stub group size. */ | |
263 | unsigned int has_12bit_branch:1; | |
264 | unsigned int has_17bit_branch:1; | |
265 | unsigned int has_22bit_branch:1; | |
266 | ||
267 | /* Set if we need a .plt stub to support lazy dynamic linking. */ | |
268 | unsigned int need_plt_stub:1; | |
269 | ||
270 | /* Small local sym to section mapping cache. */ | |
271 | struct sym_sec_cache sym_sec; | |
272 | }; | |
273 | ||
274 | /* Various hash macros and functions. */ | |
275 | #define hppa_link_hash_table(p) \ | |
276 | ((struct elf32_hppa_link_hash_table *) ((p)->hash)) | |
277 | ||
278 | #define hppa_stub_hash_lookup(table, string, create, copy) \ | |
279 | ((struct elf32_hppa_stub_hash_entry *) \ | |
280 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
281 | ||
282 | static struct bfd_hash_entry *stub_hash_newfunc | |
283 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
284 | ||
285 | static struct bfd_hash_entry *hppa_link_hash_newfunc | |
286 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
287 | ||
288 | static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create | |
289 | PARAMS ((bfd *)); | |
290 | ||
291 | static void elf32_hppa_link_hash_table_free | |
292 | PARAMS ((struct bfd_link_hash_table *)); | |
293 | ||
294 | /* Stub handling functions. */ | |
295 | static char *hppa_stub_name | |
296 | PARAMS ((const asection *, const asection *, | |
297 | const struct elf32_hppa_link_hash_entry *, | |
298 | const Elf_Internal_Rela *)); | |
299 | ||
300 | static struct elf32_hppa_stub_hash_entry *hppa_get_stub_entry | |
301 | PARAMS ((const asection *, const asection *, | |
302 | struct elf32_hppa_link_hash_entry *, | |
303 | const Elf_Internal_Rela *, | |
304 | struct elf32_hppa_link_hash_table *)); | |
305 | ||
306 | static struct elf32_hppa_stub_hash_entry *hppa_add_stub | |
307 | PARAMS ((const char *, asection *, struct elf32_hppa_link_hash_table *)); | |
308 | ||
309 | static enum elf32_hppa_stub_type hppa_type_of_stub | |
310 | PARAMS ((asection *, const Elf_Internal_Rela *, | |
311 | struct elf32_hppa_link_hash_entry *, bfd_vma)); | |
312 | ||
313 | static bfd_boolean hppa_build_one_stub | |
314 | PARAMS ((struct bfd_hash_entry *, PTR)); | |
315 | ||
316 | static bfd_boolean hppa_size_one_stub | |
317 | PARAMS ((struct bfd_hash_entry *, PTR)); | |
318 | ||
319 | /* BFD and elf backend functions. */ | |
320 | static bfd_boolean elf32_hppa_object_p PARAMS ((bfd *)); | |
321 | ||
322 | static bfd_boolean elf32_hppa_add_symbol_hook | |
323 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
324 | const char **, flagword *, asection **, bfd_vma *)); | |
325 | ||
326 | static bfd_boolean elf32_hppa_create_dynamic_sections | |
327 | PARAMS ((bfd *, struct bfd_link_info *)); | |
328 | ||
329 | static void elf32_hppa_copy_indirect_symbol | |
330 | PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, | |
331 | struct elf_link_hash_entry *)); | |
332 | ||
333 | static bfd_boolean elf32_hppa_check_relocs | |
334 | PARAMS ((bfd *, struct bfd_link_info *, | |
335 | asection *, const Elf_Internal_Rela *)); | |
336 | ||
337 | static asection *elf32_hppa_gc_mark_hook | |
338 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, | |
339 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
340 | ||
341 | static bfd_boolean elf32_hppa_gc_sweep_hook | |
342 | PARAMS ((bfd *, struct bfd_link_info *, | |
343 | asection *, const Elf_Internal_Rela *)); | |
344 | ||
345 | static void elf32_hppa_hide_symbol | |
346 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean)); | |
347 | ||
348 | static bfd_boolean elf32_hppa_adjust_dynamic_symbol | |
349 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
350 | ||
351 | static bfd_boolean mark_PIC_calls | |
352 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
353 | ||
354 | static bfd_boolean allocate_plt_static | |
355 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
356 | ||
357 | static bfd_boolean allocate_dynrelocs | |
358 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
359 | ||
360 | static bfd_boolean readonly_dynrelocs | |
361 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
362 | ||
363 | static bfd_boolean clobber_millicode_symbols | |
364 | PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *)); | |
365 | ||
366 | static bfd_boolean elf32_hppa_size_dynamic_sections | |
367 | PARAMS ((bfd *, struct bfd_link_info *)); | |
368 | ||
369 | static void group_sections | |
370 | PARAMS ((struct elf32_hppa_link_hash_table *, bfd_size_type, bfd_boolean)); | |
371 | ||
372 | static int get_local_syms | |
373 | PARAMS ((bfd *, bfd *, struct bfd_link_info *)); | |
374 | ||
375 | static bfd_boolean elf32_hppa_final_link | |
376 | PARAMS ((bfd *, struct bfd_link_info *)); | |
377 | ||
378 | static void hppa_record_segment_addr | |
379 | PARAMS ((bfd *, asection *, PTR)); | |
380 | ||
381 | static bfd_reloc_status_type final_link_relocate | |
382 | PARAMS ((asection *, bfd_byte *, const Elf_Internal_Rela *, | |
383 | bfd_vma, struct elf32_hppa_link_hash_table *, asection *, | |
384 | struct elf32_hppa_link_hash_entry *)); | |
385 | ||
386 | static bfd_boolean elf32_hppa_relocate_section | |
387 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, | |
388 | bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
389 | ||
390 | static bfd_boolean elf32_hppa_finish_dynamic_symbol | |
391 | PARAMS ((bfd *, struct bfd_link_info *, | |
392 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
393 | ||
394 | static enum elf_reloc_type_class elf32_hppa_reloc_type_class | |
395 | PARAMS ((const Elf_Internal_Rela *)); | |
396 | ||
397 | static bfd_boolean elf32_hppa_finish_dynamic_sections | |
398 | PARAMS ((bfd *, struct bfd_link_info *)); | |
399 | ||
400 | static void elf32_hppa_post_process_headers | |
401 | PARAMS ((bfd *, struct bfd_link_info *)); | |
402 | ||
403 | static int elf32_hppa_elf_get_symbol_type | |
404 | PARAMS ((Elf_Internal_Sym *, int)); | |
405 | ||
406 | /* Assorted hash table functions. */ | |
407 | ||
408 | /* Initialize an entry in the stub hash table. */ | |
409 | ||
410 | static struct bfd_hash_entry * | |
411 | stub_hash_newfunc (entry, table, string) | |
412 | struct bfd_hash_entry *entry; | |
413 | struct bfd_hash_table *table; | |
414 | const char *string; | |
415 | { | |
416 | /* Allocate the structure if it has not already been allocated by a | |
417 | subclass. */ | |
418 | if (entry == NULL) | |
419 | { | |
420 | entry = bfd_hash_allocate (table, | |
421 | sizeof (struct elf32_hppa_stub_hash_entry)); | |
422 | if (entry == NULL) | |
423 | return entry; | |
424 | } | |
425 | ||
426 | /* Call the allocation method of the superclass. */ | |
427 | entry = bfd_hash_newfunc (entry, table, string); | |
428 | if (entry != NULL) | |
429 | { | |
430 | struct elf32_hppa_stub_hash_entry *eh; | |
431 | ||
432 | /* Initialize the local fields. */ | |
433 | eh = (struct elf32_hppa_stub_hash_entry *) entry; | |
434 | eh->stub_sec = NULL; | |
435 | eh->stub_offset = 0; | |
436 | eh->target_value = 0; | |
437 | eh->target_section = NULL; | |
438 | eh->stub_type = hppa_stub_long_branch; | |
439 | eh->h = NULL; | |
440 | eh->id_sec = NULL; | |
441 | } | |
442 | ||
443 | return entry; | |
444 | } | |
445 | ||
446 | /* Initialize an entry in the link hash table. */ | |
447 | ||
448 | static struct bfd_hash_entry * | |
449 | hppa_link_hash_newfunc (entry, table, string) | |
450 | struct bfd_hash_entry *entry; | |
451 | struct bfd_hash_table *table; | |
452 | const char *string; | |
453 | { | |
454 | /* Allocate the structure if it has not already been allocated by a | |
455 | subclass. */ | |
456 | if (entry == NULL) | |
457 | { | |
458 | entry = bfd_hash_allocate (table, | |
459 | sizeof (struct elf32_hppa_link_hash_entry)); | |
460 | if (entry == NULL) | |
461 | return entry; | |
462 | } | |
463 | ||
464 | /* Call the allocation method of the superclass. */ | |
465 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
466 | if (entry != NULL) | |
467 | { | |
468 | struct elf32_hppa_link_hash_entry *eh; | |
469 | ||
470 | /* Initialize the local fields. */ | |
471 | eh = (struct elf32_hppa_link_hash_entry *) entry; | |
472 | eh->stub_cache = NULL; | |
473 | eh->dyn_relocs = NULL; | |
474 | eh->pic_call = 0; | |
475 | eh->plabel = 0; | |
476 | } | |
477 | ||
478 | return entry; | |
479 | } | |
480 | ||
481 | /* Create the derived linker hash table. The PA ELF port uses the derived | |
482 | hash table to keep information specific to the PA ELF linker (without | |
483 | using static variables). */ | |
484 | ||
485 | static struct bfd_link_hash_table * | |
486 | elf32_hppa_link_hash_table_create (abfd) | |
487 | bfd *abfd; | |
488 | { | |
489 | struct elf32_hppa_link_hash_table *ret; | |
490 | bfd_size_type amt = sizeof (*ret); | |
491 | ||
492 | ret = (struct elf32_hppa_link_hash_table *) bfd_malloc (amt); | |
493 | if (ret == NULL) | |
494 | return NULL; | |
495 | ||
496 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, hppa_link_hash_newfunc)) | |
497 | { | |
498 | free (ret); | |
499 | return NULL; | |
500 | } | |
501 | ||
502 | /* Init the stub hash table too. */ | |
503 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc)) | |
504 | return NULL; | |
505 | ||
506 | ret->stub_bfd = NULL; | |
507 | ret->add_stub_section = NULL; | |
508 | ret->layout_sections_again = NULL; | |
509 | ret->stub_group = NULL; | |
510 | ret->sgot = NULL; | |
511 | ret->srelgot = NULL; | |
512 | ret->splt = NULL; | |
513 | ret->srelplt = NULL; | |
514 | ret->sdynbss = NULL; | |
515 | ret->srelbss = NULL; | |
516 | ret->text_segment_base = (bfd_vma) -1; | |
517 | ret->data_segment_base = (bfd_vma) -1; | |
518 | ret->multi_subspace = 0; | |
519 | ret->has_12bit_branch = 0; | |
520 | ret->has_17bit_branch = 0; | |
521 | ret->has_22bit_branch = 0; | |
522 | ret->need_plt_stub = 0; | |
523 | ret->sym_sec.abfd = NULL; | |
524 | ||
525 | return &ret->elf.root; | |
526 | } | |
527 | ||
528 | /* Free the derived linker hash table. */ | |
529 | ||
530 | static void | |
531 | elf32_hppa_link_hash_table_free (hash) | |
532 | struct bfd_link_hash_table *hash; | |
533 | { | |
534 | struct elf32_hppa_link_hash_table *ret | |
535 | = (struct elf32_hppa_link_hash_table *) hash; | |
536 | ||
537 | bfd_hash_table_free (&ret->stub_hash_table); | |
538 | _bfd_generic_link_hash_table_free (hash); | |
539 | } | |
540 | ||
541 | /* Build a name for an entry in the stub hash table. */ | |
542 | ||
543 | static char * | |
544 | hppa_stub_name (input_section, sym_sec, hash, rel) | |
545 | const asection *input_section; | |
546 | const asection *sym_sec; | |
547 | const struct elf32_hppa_link_hash_entry *hash; | |
548 | const Elf_Internal_Rela *rel; | |
549 | { | |
550 | char *stub_name; | |
551 | bfd_size_type len; | |
552 | ||
553 | if (hash) | |
554 | { | |
555 | len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1; | |
556 | stub_name = bfd_malloc (len); | |
557 | if (stub_name != NULL) | |
558 | { | |
559 | sprintf (stub_name, "%08x_%s+%x", | |
560 | input_section->id & 0xffffffff, | |
561 | hash->elf.root.root.string, | |
562 | (int) rel->r_addend & 0xffffffff); | |
563 | } | |
564 | } | |
565 | else | |
566 | { | |
567 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; | |
568 | stub_name = bfd_malloc (len); | |
569 | if (stub_name != NULL) | |
570 | { | |
571 | sprintf (stub_name, "%08x_%x:%x+%x", | |
572 | input_section->id & 0xffffffff, | |
573 | sym_sec->id & 0xffffffff, | |
574 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, | |
575 | (int) rel->r_addend & 0xffffffff); | |
576 | } | |
577 | } | |
578 | return stub_name; | |
579 | } | |
580 | ||
581 | /* Look up an entry in the stub hash. Stub entries are cached because | |
582 | creating the stub name takes a bit of time. */ | |
583 | ||
584 | static struct elf32_hppa_stub_hash_entry * | |
585 | hppa_get_stub_entry (input_section, sym_sec, hash, rel, htab) | |
586 | const asection *input_section; | |
587 | const asection *sym_sec; | |
588 | struct elf32_hppa_link_hash_entry *hash; | |
589 | const Elf_Internal_Rela *rel; | |
590 | struct elf32_hppa_link_hash_table *htab; | |
591 | { | |
592 | struct elf32_hppa_stub_hash_entry *stub_entry; | |
593 | const asection *id_sec; | |
594 | ||
595 | /* If this input section is part of a group of sections sharing one | |
596 | stub section, then use the id of the first section in the group. | |
597 | Stub names need to include a section id, as there may well be | |
598 | more than one stub used to reach say, printf, and we need to | |
599 | distinguish between them. */ | |
600 | id_sec = htab->stub_group[input_section->id].link_sec; | |
601 | ||
602 | if (hash != NULL && hash->stub_cache != NULL | |
603 | && hash->stub_cache->h == hash | |
604 | && hash->stub_cache->id_sec == id_sec) | |
605 | { | |
606 | stub_entry = hash->stub_cache; | |
607 | } | |
608 | else | |
609 | { | |
610 | char *stub_name; | |
611 | ||
612 | stub_name = hppa_stub_name (id_sec, sym_sec, hash, rel); | |
613 | if (stub_name == NULL) | |
614 | return NULL; | |
615 | ||
616 | stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table, | |
617 | stub_name, FALSE, FALSE); | |
618 | if (hash != NULL) | |
619 | hash->stub_cache = stub_entry; | |
620 | ||
621 | free (stub_name); | |
622 | } | |
623 | ||
624 | return stub_entry; | |
625 | } | |
626 | ||
627 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
628 | stub entry are initialised. */ | |
629 | ||
630 | static struct elf32_hppa_stub_hash_entry * | |
631 | hppa_add_stub (stub_name, section, htab) | |
632 | const char *stub_name; | |
633 | asection *section; | |
634 | struct elf32_hppa_link_hash_table *htab; | |
635 | { | |
636 | asection *link_sec; | |
637 | asection *stub_sec; | |
638 | struct elf32_hppa_stub_hash_entry *stub_entry; | |
639 | ||
640 | link_sec = htab->stub_group[section->id].link_sec; | |
641 | stub_sec = htab->stub_group[section->id].stub_sec; | |
642 | if (stub_sec == NULL) | |
643 | { | |
644 | stub_sec = htab->stub_group[link_sec->id].stub_sec; | |
645 | if (stub_sec == NULL) | |
646 | { | |
647 | size_t namelen; | |
648 | bfd_size_type len; | |
649 | char *s_name; | |
650 | ||
651 | namelen = strlen (link_sec->name); | |
652 | len = namelen + sizeof (STUB_SUFFIX); | |
653 | s_name = bfd_alloc (htab->stub_bfd, len); | |
654 | if (s_name == NULL) | |
655 | return NULL; | |
656 | ||
657 | memcpy (s_name, link_sec->name, namelen); | |
658 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
659 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); | |
660 | if (stub_sec == NULL) | |
661 | return NULL; | |
662 | htab->stub_group[link_sec->id].stub_sec = stub_sec; | |
663 | } | |
664 | htab->stub_group[section->id].stub_sec = stub_sec; | |
665 | } | |
666 | ||
667 | /* Enter this entry into the linker stub hash table. */ | |
668 | stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
669 | TRUE, FALSE); | |
670 | if (stub_entry == NULL) | |
671 | { | |
672 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), | |
673 | bfd_archive_filename (section->owner), | |
674 | stub_name); | |
675 | return NULL; | |
676 | } | |
677 | ||
678 | stub_entry->stub_sec = stub_sec; | |
679 | stub_entry->stub_offset = 0; | |
680 | stub_entry->id_sec = link_sec; | |
681 | return stub_entry; | |
682 | } | |
683 | ||
684 | /* Determine the type of stub needed, if any, for a call. */ | |
685 | ||
686 | static enum elf32_hppa_stub_type | |
687 | hppa_type_of_stub (input_sec, rel, hash, destination) | |
688 | asection *input_sec; | |
689 | const Elf_Internal_Rela *rel; | |
690 | struct elf32_hppa_link_hash_entry *hash; | |
691 | bfd_vma destination; | |
692 | { | |
693 | bfd_vma location; | |
694 | bfd_vma branch_offset; | |
695 | bfd_vma max_branch_offset; | |
696 | unsigned int r_type; | |
697 | ||
698 | if (hash != NULL | |
699 | && hash->elf.plt.offset != (bfd_vma) -1 | |
700 | && (hash->elf.dynindx != -1 || hash->pic_call) | |
701 | && !hash->plabel) | |
702 | { | |
703 | /* We need an import stub. Decide between hppa_stub_import | |
704 | and hppa_stub_import_shared later. */ | |
705 | return hppa_stub_import; | |
706 | } | |
707 | ||
708 | /* Determine where the call point is. */ | |
709 | location = (input_sec->output_offset | |
710 | + input_sec->output_section->vma | |
711 | + rel->r_offset); | |
712 | ||
713 | branch_offset = destination - location - 8; | |
714 | r_type = ELF32_R_TYPE (rel->r_info); | |
715 | ||
716 | /* Determine if a long branch stub is needed. parisc branch offsets | |
717 | are relative to the second instruction past the branch, ie. +8 | |
718 | bytes on from the branch instruction location. The offset is | |
719 | signed and counts in units of 4 bytes. */ | |
720 | if (r_type == (unsigned int) R_PARISC_PCREL17F) | |
721 | { | |
722 | max_branch_offset = (1 << (17-1)) << 2; | |
723 | } | |
724 | else if (r_type == (unsigned int) R_PARISC_PCREL12F) | |
725 | { | |
726 | max_branch_offset = (1 << (12-1)) << 2; | |
727 | } | |
728 | else /* R_PARISC_PCREL22F. */ | |
729 | { | |
730 | max_branch_offset = (1 << (22-1)) << 2; | |
731 | } | |
732 | ||
733 | if (branch_offset + max_branch_offset >= 2*max_branch_offset) | |
734 | return hppa_stub_long_branch; | |
735 | ||
736 | return hppa_stub_none; | |
737 | } | |
738 | ||
739 | /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY. | |
740 | IN_ARG contains the link info pointer. */ | |
741 | ||
742 | #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */ | |
743 | #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */ | |
744 | ||
745 | #define BL_R1 0xe8200000 /* b,l .+8,%r1 */ | |
746 | #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */ | |
747 | #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */ | |
748 | ||
749 | #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */ | |
750 | #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */ | |
751 | #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */ | |
752 | #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */ | |
753 | ||
754 | #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */ | |
755 | #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */ | |
756 | ||
757 | #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */ | |
758 | #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */ | |
759 | #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */ | |
760 | #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */ | |
761 | ||
762 | #define BL22_RP 0xe800a002 /* b,l,n XXX,%rp */ | |
763 | #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */ | |
764 | #define NOP 0x08000240 /* nop */ | |
765 | #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */ | |
766 | #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */ | |
767 | #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */ | |
768 | ||
769 | #ifndef R19_STUBS | |
770 | #define R19_STUBS 1 | |
771 | #endif | |
772 | ||
773 | #if R19_STUBS | |
774 | #define LDW_R1_DLT LDW_R1_R19 | |
775 | #else | |
776 | #define LDW_R1_DLT LDW_R1_DP | |
777 | #endif | |
778 | ||
779 | static bfd_boolean | |
780 | hppa_build_one_stub (gen_entry, in_arg) | |
781 | struct bfd_hash_entry *gen_entry; | |
782 | PTR in_arg; | |
783 | { | |
784 | struct elf32_hppa_stub_hash_entry *stub_entry; | |
785 | struct bfd_link_info *info; | |
786 | struct elf32_hppa_link_hash_table *htab; | |
787 | asection *stub_sec; | |
788 | bfd *stub_bfd; | |
789 | bfd_byte *loc; | |
790 | bfd_vma sym_value; | |
791 | bfd_vma insn; | |
792 | bfd_vma off; | |
793 | int val; | |
794 | int size; | |
795 | ||
796 | /* Massage our args to the form they really have. */ | |
797 | stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry; | |
798 | info = (struct bfd_link_info *) in_arg; | |
799 | ||
800 | htab = hppa_link_hash_table (info); | |
801 | stub_sec = stub_entry->stub_sec; | |
802 | ||
803 | /* Make a note of the offset within the stubs for this entry. */ | |
804 | stub_entry->stub_offset = stub_sec->_raw_size; | |
805 | loc = stub_sec->contents + stub_entry->stub_offset; | |
806 | ||
807 | stub_bfd = stub_sec->owner; | |
808 | ||
809 | switch (stub_entry->stub_type) | |
810 | { | |
811 | case hppa_stub_long_branch: | |
812 | /* Create the long branch. A long branch is formed with "ldil" | |
813 | loading the upper bits of the target address into a register, | |
814 | then branching with "be" which adds in the lower bits. | |
815 | The "be" has its delay slot nullified. */ | |
816 | sym_value = (stub_entry->target_value | |
817 | + stub_entry->target_section->output_offset | |
818 | + stub_entry->target_section->output_section->vma); | |
819 | ||
820 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel); | |
821 | insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21); | |
822 | bfd_put_32 (stub_bfd, insn, loc); | |
823 | ||
824 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel) >> 2; | |
825 | insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); | |
826 | bfd_put_32 (stub_bfd, insn, loc + 4); | |
827 | ||
828 | size = 8; | |
829 | break; | |
830 | ||
831 | case hppa_stub_long_branch_shared: | |
832 | /* Branches are relative. This is where we are going to. */ | |
833 | sym_value = (stub_entry->target_value | |
834 | + stub_entry->target_section->output_offset | |
835 | + stub_entry->target_section->output_section->vma); | |
836 | ||
837 | /* And this is where we are coming from, more or less. */ | |
838 | sym_value -= (stub_entry->stub_offset | |
839 | + stub_sec->output_offset | |
840 | + stub_sec->output_section->vma); | |
841 | ||
842 | bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc); | |
843 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel); | |
844 | insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21); | |
845 | bfd_put_32 (stub_bfd, insn, loc + 4); | |
846 | ||
847 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2; | |
848 | insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); | |
849 | bfd_put_32 (stub_bfd, insn, loc + 8); | |
850 | size = 12; | |
851 | break; | |
852 | ||
853 | case hppa_stub_import: | |
854 | case hppa_stub_import_shared: | |
855 | off = stub_entry->h->elf.plt.offset; | |
856 | if (off >= (bfd_vma) -2) | |
857 | abort (); | |
858 | ||
859 | off &= ~ (bfd_vma) 1; | |
860 | sym_value = (off | |
861 | + htab->splt->output_offset | |
862 | + htab->splt->output_section->vma | |
863 | - elf_gp (htab->splt->output_section->owner)); | |
864 | ||
865 | insn = ADDIL_DP; | |
866 | #if R19_STUBS | |
867 | if (stub_entry->stub_type == hppa_stub_import_shared) | |
868 | insn = ADDIL_R19; | |
869 | #endif | |
870 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel), | |
871 | insn = hppa_rebuild_insn ((int) insn, val, 21); | |
872 | bfd_put_32 (stub_bfd, insn, loc); | |
873 | ||
874 | /* It is critical to use lrsel/rrsel here because we are using | |
875 | two different offsets (+0 and +4) from sym_value. If we use | |
876 | lsel/rsel then with unfortunate sym_values we will round | |
877 | sym_value+4 up to the next 2k block leading to a mis-match | |
878 | between the lsel and rsel value. */ | |
879 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel); | |
880 | insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14); | |
881 | bfd_put_32 (stub_bfd, insn, loc + 4); | |
882 | ||
883 | if (htab->multi_subspace) | |
884 | { | |
885 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); | |
886 | insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); | |
887 | bfd_put_32 (stub_bfd, insn, loc + 8); | |
888 | ||
889 | bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12); | |
890 | bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); | |
891 | bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20); | |
892 | bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24); | |
893 | ||
894 | size = 28; | |
895 | } | |
896 | else | |
897 | { | |
898 | bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8); | |
899 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); | |
900 | insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); | |
901 | bfd_put_32 (stub_bfd, insn, loc + 12); | |
902 | ||
903 | size = 16; | |
904 | } | |
905 | ||
906 | if (!info->shared | |
907 | && stub_entry->h != NULL | |
908 | && stub_entry->h->pic_call) | |
909 | { | |
910 | /* Build the .plt entry needed to call a PIC function from | |
911 | statically linked code. We don't need any relocs. */ | |
912 | bfd *dynobj; | |
913 | struct elf32_hppa_link_hash_entry *eh; | |
914 | bfd_vma value; | |
915 | ||
916 | dynobj = htab->elf.dynobj; | |
917 | eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h; | |
918 | ||
919 | if (eh->elf.root.type != bfd_link_hash_defined | |
920 | && eh->elf.root.type != bfd_link_hash_defweak) | |
921 | abort (); | |
922 | ||
923 | value = (eh->elf.root.u.def.value | |
924 | + eh->elf.root.u.def.section->output_offset | |
925 | + eh->elf.root.u.def.section->output_section->vma); | |
926 | ||
927 | /* Fill in the entry in the procedure linkage table. | |
928 | ||
929 | The format of a plt entry is | |
930 | <funcaddr> | |
931 | <__gp>. */ | |
932 | ||
933 | bfd_put_32 (htab->splt->owner, value, | |
934 | htab->splt->contents + off); | |
935 | value = elf_gp (htab->splt->output_section->owner); | |
936 | bfd_put_32 (htab->splt->owner, value, | |
937 | htab->splt->contents + off + 4); | |
938 | } | |
939 | break; | |
940 | ||
941 | case hppa_stub_export: | |
942 | /* Branches are relative. This is where we are going to. */ | |
943 | sym_value = (stub_entry->target_value | |
944 | + stub_entry->target_section->output_offset | |
945 | + stub_entry->target_section->output_section->vma); | |
946 | ||
947 | /* And this is where we are coming from. */ | |
948 | sym_value -= (stub_entry->stub_offset | |
949 | + stub_sec->output_offset | |
950 | + stub_sec->output_section->vma); | |
951 | ||
952 | if (sym_value - 8 + (1 << (17 + 1)) >= (1 << (17 + 2)) | |
953 | && (!htab->has_22bit_branch | |
954 | || sym_value - 8 + (1 << (22 + 1)) >= (1 << (22 + 2)))) | |
955 | { | |
956 | (*_bfd_error_handler) | |
957 | (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"), | |
958 | bfd_archive_filename (stub_entry->target_section->owner), | |
959 | stub_sec->name, | |
960 | (long) stub_entry->stub_offset, | |
961 | stub_entry->root.string); | |
962 | bfd_set_error (bfd_error_bad_value); | |
963 | return FALSE; | |
964 | } | |
965 | ||
966 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2; | |
967 | if (!htab->has_22bit_branch) | |
968 | insn = hppa_rebuild_insn ((int) BL_RP, val, 17); | |
969 | else | |
970 | insn = hppa_rebuild_insn ((int) BL22_RP, val, 22); | |
971 | bfd_put_32 (stub_bfd, insn, loc); | |
972 | ||
973 | bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4); | |
974 | bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8); | |
975 | bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12); | |
976 | bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); | |
977 | bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20); | |
978 | ||
979 | /* Point the function symbol at the stub. */ | |
980 | stub_entry->h->elf.root.u.def.section = stub_sec; | |
981 | stub_entry->h->elf.root.u.def.value = stub_sec->_raw_size; | |
982 | ||
983 | size = 24; | |
984 | break; | |
985 | ||
986 | default: | |
987 | BFD_FAIL (); | |
988 | return FALSE; | |
989 | } | |
990 | ||
991 | stub_sec->_raw_size += size; | |
992 | return TRUE; | |
993 | } | |
994 | ||
995 | #undef LDIL_R1 | |
996 | #undef BE_SR4_R1 | |
997 | #undef BL_R1 | |
998 | #undef ADDIL_R1 | |
999 | #undef DEPI_R1 | |
1000 | #undef ADDIL_DP | |
1001 | #undef LDW_R1_R21 | |
1002 | #undef LDW_R1_DLT | |
1003 | #undef LDW_R1_R19 | |
1004 | #undef ADDIL_R19 | |
1005 | #undef LDW_R1_DP | |
1006 | #undef LDSID_R21_R1 | |
1007 | #undef MTSP_R1 | |
1008 | #undef BE_SR0_R21 | |
1009 | #undef STW_RP | |
1010 | #undef BV_R0_R21 | |
1011 | #undef BL_RP | |
1012 | #undef NOP | |
1013 | #undef LDW_RP | |
1014 | #undef LDSID_RP_R1 | |
1015 | #undef BE_SR0_RP | |
1016 | ||
1017 | /* As above, but don't actually build the stub. Just bump offset so | |
1018 | we know stub section sizes. */ | |
1019 | ||
1020 | static bfd_boolean | |
1021 | hppa_size_one_stub (gen_entry, in_arg) | |
1022 | struct bfd_hash_entry *gen_entry; | |
1023 | PTR in_arg; | |
1024 | { | |
1025 | struct elf32_hppa_stub_hash_entry *stub_entry; | |
1026 | struct elf32_hppa_link_hash_table *htab; | |
1027 | int size; | |
1028 | ||
1029 | /* Massage our args to the form they really have. */ | |
1030 | stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry; | |
1031 | htab = (struct elf32_hppa_link_hash_table *) in_arg; | |
1032 | ||
1033 | if (stub_entry->stub_type == hppa_stub_long_branch) | |
1034 | size = 8; | |
1035 | else if (stub_entry->stub_type == hppa_stub_long_branch_shared) | |
1036 | size = 12; | |
1037 | else if (stub_entry->stub_type == hppa_stub_export) | |
1038 | size = 24; | |
1039 | else /* hppa_stub_import or hppa_stub_import_shared. */ | |
1040 | { | |
1041 | if (htab->multi_subspace) | |
1042 | size = 28; | |
1043 | else | |
1044 | size = 16; | |
1045 | } | |
1046 | ||
1047 | stub_entry->stub_sec->_raw_size += size; | |
1048 | return TRUE; | |
1049 | } | |
1050 | ||
1051 | /* Return nonzero if ABFD represents an HPPA ELF32 file. | |
1052 | Additionally we set the default architecture and machine. */ | |
1053 | ||
1054 | static bfd_boolean | |
1055 | elf32_hppa_object_p (abfd) | |
1056 | bfd *abfd; | |
1057 | { | |
1058 | Elf_Internal_Ehdr * i_ehdrp; | |
1059 | unsigned int flags; | |
1060 | ||
1061 | i_ehdrp = elf_elfheader (abfd); | |
1062 | if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0) | |
1063 | { | |
1064 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_LINUX) | |
1065 | return FALSE; | |
1066 | } | |
1067 | else | |
1068 | { | |
1069 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX) | |
1070 | return FALSE; | |
1071 | } | |
1072 | ||
1073 | flags = i_ehdrp->e_flags; | |
1074 | switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE)) | |
1075 | { | |
1076 | case EFA_PARISC_1_0: | |
1077 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10); | |
1078 | case EFA_PARISC_1_1: | |
1079 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11); | |
1080 | case EFA_PARISC_2_0: | |
1081 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20); | |
1082 | case EFA_PARISC_2_0 | EF_PARISC_WIDE: | |
1083 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25); | |
1084 | } | |
1085 | return TRUE; | |
1086 | } | |
1087 | ||
1088 | /* Undo the generic ELF code's subtraction of section->vma from the | |
1089 | value of each external symbol. */ | |
1090 | ||
1091 | static bfd_boolean | |
1092 | elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) | |
1093 | bfd *abfd ATTRIBUTE_UNUSED; | |
1094 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
1095 | const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED; | |
1096 | const char **namep ATTRIBUTE_UNUSED; | |
1097 | flagword *flagsp ATTRIBUTE_UNUSED; | |
1098 | asection **secp; | |
1099 | bfd_vma *valp; | |
1100 | { | |
1101 | *valp += (*secp)->vma; | |
1102 | return TRUE; | |
1103 | } | |
1104 | ||
1105 | /* Create the .plt and .got sections, and set up our hash table | |
1106 | short-cuts to various dynamic sections. */ | |
1107 | ||
1108 | static bfd_boolean | |
1109 | elf32_hppa_create_dynamic_sections (abfd, info) | |
1110 | bfd *abfd; | |
1111 | struct bfd_link_info *info; | |
1112 | { | |
1113 | struct elf32_hppa_link_hash_table *htab; | |
1114 | ||
1115 | /* Don't try to create the .plt and .got twice. */ | |
1116 | htab = hppa_link_hash_table (info); | |
1117 | if (htab->splt != NULL) | |
1118 | return TRUE; | |
1119 | ||
1120 | /* Call the generic code to do most of the work. */ | |
1121 | if (! _bfd_elf_create_dynamic_sections (abfd, info)) | |
1122 | return FALSE; | |
1123 | ||
1124 | htab->splt = bfd_get_section_by_name (abfd, ".plt"); | |
1125 | htab->srelplt = bfd_get_section_by_name (abfd, ".rela.plt"); | |
1126 | ||
1127 | htab->sgot = bfd_get_section_by_name (abfd, ".got"); | |
1128 | htab->srelgot = bfd_make_section (abfd, ".rela.got"); | |
1129 | if (htab->srelgot == NULL | |
1130 | || ! bfd_set_section_flags (abfd, htab->srelgot, | |
1131 | (SEC_ALLOC | |
1132 | | SEC_LOAD | |
1133 | | SEC_HAS_CONTENTS | |
1134 | | SEC_IN_MEMORY | |
1135 | | SEC_LINKER_CREATED | |
1136 | | SEC_READONLY)) | |
1137 | || ! bfd_set_section_alignment (abfd, htab->srelgot, 2)) | |
1138 | return FALSE; | |
1139 | ||
1140 | htab->sdynbss = bfd_get_section_by_name (abfd, ".dynbss"); | |
1141 | htab->srelbss = bfd_get_section_by_name (abfd, ".rela.bss"); | |
1142 | ||
1143 | return TRUE; | |
1144 | } | |
1145 | ||
1146 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1147 | ||
1148 | static void | |
1149 | elf32_hppa_copy_indirect_symbol (bed, dir, ind) | |
1150 | struct elf_backend_data *bed; | |
1151 | struct elf_link_hash_entry *dir, *ind; | |
1152 | { | |
1153 | struct elf32_hppa_link_hash_entry *edir, *eind; | |
1154 | ||
1155 | edir = (struct elf32_hppa_link_hash_entry *) dir; | |
1156 | eind = (struct elf32_hppa_link_hash_entry *) ind; | |
1157 | ||
1158 | if (eind->dyn_relocs != NULL) | |
1159 | { | |
1160 | if (edir->dyn_relocs != NULL) | |
1161 | { | |
1162 | struct elf32_hppa_dyn_reloc_entry **pp; | |
1163 | struct elf32_hppa_dyn_reloc_entry *p; | |
1164 | ||
1165 | if (ind->root.type == bfd_link_hash_indirect) | |
1166 | abort (); | |
1167 | ||
1168 | /* Add reloc counts against the weak sym to the strong sym | |
1169 | list. Merge any entries against the same section. */ | |
1170 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1171 | { | |
1172 | struct elf32_hppa_dyn_reloc_entry *q; | |
1173 | ||
1174 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1175 | if (q->sec == p->sec) | |
1176 | { | |
1177 | #if RELATIVE_DYNRELOCS | |
1178 | q->relative_count += p->relative_count; | |
1179 | #endif | |
1180 | q->count += p->count; | |
1181 | *pp = p->next; | |
1182 | break; | |
1183 | } | |
1184 | if (q == NULL) | |
1185 | pp = &p->next; | |
1186 | } | |
1187 | *pp = edir->dyn_relocs; | |
1188 | } | |
1189 | ||
1190 | edir->dyn_relocs = eind->dyn_relocs; | |
1191 | eind->dyn_relocs = NULL; | |
1192 | } | |
1193 | ||
1194 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
1195 | } | |
1196 | ||
1197 | /* Look through the relocs for a section during the first phase, and | |
1198 | calculate needed space in the global offset table, procedure linkage | |
1199 | table, and dynamic reloc sections. At this point we haven't | |
1200 | necessarily read all the input files. */ | |
1201 | ||
1202 | static bfd_boolean | |
1203 | elf32_hppa_check_relocs (abfd, info, sec, relocs) | |
1204 | bfd *abfd; | |
1205 | struct bfd_link_info *info; | |
1206 | asection *sec; | |
1207 | const Elf_Internal_Rela *relocs; | |
1208 | { | |
1209 | Elf_Internal_Shdr *symtab_hdr; | |
1210 | struct elf_link_hash_entry **sym_hashes; | |
1211 | const Elf_Internal_Rela *rel; | |
1212 | const Elf_Internal_Rela *rel_end; | |
1213 | struct elf32_hppa_link_hash_table *htab; | |
1214 | asection *sreloc; | |
1215 | asection *stubreloc; | |
1216 | ||
1217 | if (info->relocatable) | |
1218 | return TRUE; | |
1219 | ||
1220 | htab = hppa_link_hash_table (info); | |
1221 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1222 | sym_hashes = elf_sym_hashes (abfd); | |
1223 | sreloc = NULL; | |
1224 | stubreloc = NULL; | |
1225 | ||
1226 | rel_end = relocs + sec->reloc_count; | |
1227 | for (rel = relocs; rel < rel_end; rel++) | |
1228 | { | |
1229 | enum { | |
1230 | NEED_GOT = 1, | |
1231 | NEED_PLT = 2, | |
1232 | NEED_DYNREL = 4, | |
1233 | PLT_PLABEL = 8 | |
1234 | }; | |
1235 | ||
1236 | unsigned int r_symndx, r_type; | |
1237 | struct elf32_hppa_link_hash_entry *h; | |
1238 | int need_entry; | |
1239 | ||
1240 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1241 | ||
1242 | if (r_symndx < symtab_hdr->sh_info) | |
1243 | h = NULL; | |
1244 | else | |
1245 | h = ((struct elf32_hppa_link_hash_entry *) | |
1246 | sym_hashes[r_symndx - symtab_hdr->sh_info]); | |
1247 | ||
1248 | r_type = ELF32_R_TYPE (rel->r_info); | |
1249 | ||
1250 | switch (r_type) | |
1251 | { | |
1252 | case R_PARISC_DLTIND14F: | |
1253 | case R_PARISC_DLTIND14R: | |
1254 | case R_PARISC_DLTIND21L: | |
1255 | /* This symbol requires a global offset table entry. */ | |
1256 | need_entry = NEED_GOT; | |
1257 | ||
1258 | /* Mark this section as containing PIC code. */ | |
1259 | sec->flags |= SEC_HAS_GOT_REF; | |
1260 | break; | |
1261 | ||
1262 | case R_PARISC_PLABEL14R: /* "Official" procedure labels. */ | |
1263 | case R_PARISC_PLABEL21L: | |
1264 | case R_PARISC_PLABEL32: | |
1265 | /* If the addend is non-zero, we break badly. */ | |
1266 | if (rel->r_addend != 0) | |
1267 | abort (); | |
1268 | ||
1269 | /* If we are creating a shared library, then we need to | |
1270 | create a PLT entry for all PLABELs, because PLABELs with | |
1271 | local symbols may be passed via a pointer to another | |
1272 | object. Additionally, output a dynamic relocation | |
1273 | pointing to the PLT entry. | |
1274 | For executables, the original 32-bit ABI allowed two | |
1275 | different styles of PLABELs (function pointers): For | |
1276 | global functions, the PLABEL word points into the .plt | |
1277 | two bytes past a (function address, gp) pair, and for | |
1278 | local functions the PLABEL points directly at the | |
1279 | function. The magic +2 for the first type allows us to | |
1280 | differentiate between the two. As you can imagine, this | |
1281 | is a real pain when it comes to generating code to call | |
1282 | functions indirectly or to compare function pointers. | |
1283 | We avoid the mess by always pointing a PLABEL into the | |
1284 | .plt, even for local functions. */ | |
1285 | need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL; | |
1286 | break; | |
1287 | ||
1288 | case R_PARISC_PCREL12F: | |
1289 | htab->has_12bit_branch = 1; | |
1290 | goto branch_common; | |
1291 | ||
1292 | case R_PARISC_PCREL17C: | |
1293 | case R_PARISC_PCREL17F: | |
1294 | htab->has_17bit_branch = 1; | |
1295 | goto branch_common; | |
1296 | ||
1297 | case R_PARISC_PCREL22F: | |
1298 | htab->has_22bit_branch = 1; | |
1299 | branch_common: | |
1300 | /* Function calls might need to go through the .plt, and | |
1301 | might require long branch stubs. */ | |
1302 | if (h == NULL) | |
1303 | { | |
1304 | /* We know local syms won't need a .plt entry, and if | |
1305 | they need a long branch stub we can't guarantee that | |
1306 | we can reach the stub. So just flag an error later | |
1307 | if we're doing a shared link and find we need a long | |
1308 | branch stub. */ | |
1309 | continue; | |
1310 | } | |
1311 | else | |
1312 | { | |
1313 | /* Global symbols will need a .plt entry if they remain | |
1314 | global, and in most cases won't need a long branch | |
1315 | stub. Unfortunately, we have to cater for the case | |
1316 | where a symbol is forced local by versioning, or due | |
1317 | to symbolic linking, and we lose the .plt entry. */ | |
1318 | need_entry = NEED_PLT; | |
1319 | if (h->elf.type == STT_PARISC_MILLI) | |
1320 | need_entry = 0; | |
1321 | } | |
1322 | break; | |
1323 | ||
1324 | case R_PARISC_SEGBASE: /* Used to set segment base. */ | |
1325 | case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */ | |
1326 | case R_PARISC_PCREL14F: /* PC relative load/store. */ | |
1327 | case R_PARISC_PCREL14R: | |
1328 | case R_PARISC_PCREL17R: /* External branches. */ | |
1329 | case R_PARISC_PCREL21L: /* As above, and for load/store too. */ | |
1330 | /* We don't need to propagate the relocation if linking a | |
1331 | shared object since these are section relative. */ | |
1332 | continue; | |
1333 | ||
1334 | case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */ | |
1335 | case R_PARISC_DPREL14R: | |
1336 | case R_PARISC_DPREL21L: | |
1337 | if (info->shared) | |
1338 | { | |
1339 | (*_bfd_error_handler) | |
1340 | (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), | |
1341 | bfd_archive_filename (abfd), | |
1342 | elf_hppa_howto_table[r_type].name); | |
1343 | bfd_set_error (bfd_error_bad_value); | |
1344 | return FALSE; | |
1345 | } | |
1346 | /* Fall through. */ | |
1347 | ||
1348 | case R_PARISC_DIR17F: /* Used for external branches. */ | |
1349 | case R_PARISC_DIR17R: | |
1350 | case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */ | |
1351 | case R_PARISC_DIR14R: | |
1352 | case R_PARISC_DIR21L: /* As above, and for ext branches too. */ | |
1353 | #if 0 | |
1354 | /* Help debug shared library creation. Any of the above | |
1355 | relocs can be used in shared libs, but they may cause | |
1356 | pages to become unshared. */ | |
1357 | if (info->shared) | |
1358 | { | |
1359 | (*_bfd_error_handler) | |
1360 | (_("%s: relocation %s should not be used when making a shared object; recompile with -fPIC"), | |
1361 | bfd_archive_filename (abfd), | |
1362 | elf_hppa_howto_table[r_type].name); | |
1363 | } | |
1364 | /* Fall through. */ | |
1365 | #endif | |
1366 | ||
1367 | case R_PARISC_DIR32: /* .word relocs. */ | |
1368 | /* We may want to output a dynamic relocation later. */ | |
1369 | need_entry = NEED_DYNREL; | |
1370 | break; | |
1371 | ||
1372 | /* This relocation describes the C++ object vtable hierarchy. | |
1373 | Reconstruct it for later use during GC. */ | |
1374 | case R_PARISC_GNU_VTINHERIT: | |
1375 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, | |
1376 | &h->elf, rel->r_offset)) | |
1377 | return FALSE; | |
1378 | continue; | |
1379 | ||
1380 | /* This relocation describes which C++ vtable entries are actually | |
1381 | used. Record for later use during GC. */ | |
1382 | case R_PARISC_GNU_VTENTRY: | |
1383 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, | |
1384 | &h->elf, rel->r_addend)) | |
1385 | return FALSE; | |
1386 | continue; | |
1387 | ||
1388 | default: | |
1389 | continue; | |
1390 | } | |
1391 | ||
1392 | /* Now carry out our orders. */ | |
1393 | if (need_entry & NEED_GOT) | |
1394 | { | |
1395 | /* Allocate space for a GOT entry, as well as a dynamic | |
1396 | relocation for this entry. */ | |
1397 | if (htab->sgot == NULL) | |
1398 | { | |
1399 | if (htab->elf.dynobj == NULL) | |
1400 | htab->elf.dynobj = abfd; | |
1401 | if (!elf32_hppa_create_dynamic_sections (htab->elf.dynobj, info)) | |
1402 | return FALSE; | |
1403 | } | |
1404 | ||
1405 | if (h != NULL) | |
1406 | { | |
1407 | h->elf.got.refcount += 1; | |
1408 | } | |
1409 | else | |
1410 | { | |
1411 | bfd_signed_vma *local_got_refcounts; | |
1412 | ||
1413 | /* This is a global offset table entry for a local symbol. */ | |
1414 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1415 | if (local_got_refcounts == NULL) | |
1416 | { | |
1417 | bfd_size_type size; | |
1418 | ||
1419 | /* Allocate space for local got offsets and local | |
1420 | plt offsets. Done this way to save polluting | |
1421 | elf_obj_tdata with another target specific | |
1422 | pointer. */ | |
1423 | size = symtab_hdr->sh_info; | |
1424 | size *= 2 * sizeof (bfd_signed_vma); | |
1425 | local_got_refcounts = ((bfd_signed_vma *) | |
1426 | bfd_zalloc (abfd, size)); | |
1427 | if (local_got_refcounts == NULL) | |
1428 | return FALSE; | |
1429 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
1430 | } | |
1431 | local_got_refcounts[r_symndx] += 1; | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | if (need_entry & NEED_PLT) | |
1436 | { | |
1437 | /* If we are creating a shared library, and this is a reloc | |
1438 | against a weak symbol or a global symbol in a dynamic | |
1439 | object, then we will be creating an import stub and a | |
1440 | .plt entry for the symbol. Similarly, on a normal link | |
1441 | to symbols defined in a dynamic object we'll need the | |
1442 | import stub and a .plt entry. We don't know yet whether | |
1443 | the symbol is defined or not, so make an entry anyway and | |
1444 | clean up later in adjust_dynamic_symbol. */ | |
1445 | if ((sec->flags & SEC_ALLOC) != 0) | |
1446 | { | |
1447 | if (h != NULL) | |
1448 | { | |
1449 | h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1450 | h->elf.plt.refcount += 1; | |
1451 | ||
1452 | /* If this .plt entry is for a plabel, mark it so | |
1453 | that adjust_dynamic_symbol will keep the entry | |
1454 | even if it appears to be local. */ | |
1455 | if (need_entry & PLT_PLABEL) | |
1456 | h->plabel = 1; | |
1457 | } | |
1458 | else if (need_entry & PLT_PLABEL) | |
1459 | { | |
1460 | bfd_signed_vma *local_got_refcounts; | |
1461 | bfd_signed_vma *local_plt_refcounts; | |
1462 | ||
1463 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1464 | if (local_got_refcounts == NULL) | |
1465 | { | |
1466 | bfd_size_type size; | |
1467 | ||
1468 | /* Allocate space for local got offsets and local | |
1469 | plt offsets. */ | |
1470 | size = symtab_hdr->sh_info; | |
1471 | size *= 2 * sizeof (bfd_signed_vma); | |
1472 | local_got_refcounts = ((bfd_signed_vma *) | |
1473 | bfd_zalloc (abfd, size)); | |
1474 | if (local_got_refcounts == NULL) | |
1475 | return FALSE; | |
1476 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
1477 | } | |
1478 | local_plt_refcounts = (local_got_refcounts | |
1479 | + symtab_hdr->sh_info); | |
1480 | local_plt_refcounts[r_symndx] += 1; | |
1481 | } | |
1482 | } | |
1483 | } | |
1484 | ||
1485 | if (need_entry & NEED_DYNREL) | |
1486 | { | |
1487 | /* Flag this symbol as having a non-got, non-plt reference | |
1488 | so that we generate copy relocs if it turns out to be | |
1489 | dynamic. */ | |
1490 | if (h != NULL && !info->shared) | |
1491 | h->elf.elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
1492 | ||
1493 | /* If we are creating a shared library then we need to copy | |
1494 | the reloc into the shared library. However, if we are | |
1495 | linking with -Bsymbolic, we need only copy absolute | |
1496 | relocs or relocs against symbols that are not defined in | |
1497 | an object we are including in the link. PC- or DP- or | |
1498 | DLT-relative relocs against any local sym or global sym | |
1499 | with DEF_REGULAR set, can be discarded. At this point we | |
1500 | have not seen all the input files, so it is possible that | |
1501 | DEF_REGULAR is not set now but will be set later (it is | |
1502 | never cleared). We account for that possibility below by | |
1503 | storing information in the dyn_relocs field of the | |
1504 | hash table entry. | |
1505 | ||
1506 | A similar situation to the -Bsymbolic case occurs when | |
1507 | creating shared libraries and symbol visibility changes | |
1508 | render the symbol local. | |
1509 | ||
1510 | As it turns out, all the relocs we will be creating here | |
1511 | are absolute, so we cannot remove them on -Bsymbolic | |
1512 | links or visibility changes anyway. A STUB_REL reloc | |
1513 | is absolute too, as in that case it is the reloc in the | |
1514 | stub we will be creating, rather than copying the PCREL | |
1515 | reloc in the branch. | |
1516 | ||
1517 | If on the other hand, we are creating an executable, we | |
1518 | may need to keep relocations for symbols satisfied by a | |
1519 | dynamic library if we manage to avoid copy relocs for the | |
1520 | symbol. */ | |
1521 | if ((info->shared | |
1522 | && (sec->flags & SEC_ALLOC) != 0 | |
1523 | && (IS_ABSOLUTE_RELOC (r_type) | |
1524 | || (h != NULL | |
1525 | && (!info->symbolic | |
1526 | || h->elf.root.type == bfd_link_hash_defweak | |
1527 | || (h->elf.elf_link_hash_flags | |
1528 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1529 | || (!info->shared | |
1530 | && (sec->flags & SEC_ALLOC) != 0 | |
1531 | && h != NULL | |
1532 | && (h->elf.root.type == bfd_link_hash_defweak | |
1533 | || (h->elf.elf_link_hash_flags | |
1534 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
1535 | { | |
1536 | struct elf32_hppa_dyn_reloc_entry *p; | |
1537 | struct elf32_hppa_dyn_reloc_entry **head; | |
1538 | ||
1539 | /* Create a reloc section in dynobj and make room for | |
1540 | this reloc. */ | |
1541 | if (sreloc == NULL) | |
1542 | { | |
1543 | char *name; | |
1544 | bfd *dynobj; | |
1545 | ||
1546 | name = (bfd_elf_string_from_elf_section | |
1547 | (abfd, | |
1548 | elf_elfheader (abfd)->e_shstrndx, | |
1549 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1550 | if (name == NULL) | |
1551 | { | |
1552 | (*_bfd_error_handler) | |
1553 | (_("Could not find relocation section for %s"), | |
1554 | sec->name); | |
1555 | bfd_set_error (bfd_error_bad_value); | |
1556 | return FALSE; | |
1557 | } | |
1558 | ||
1559 | if (htab->elf.dynobj == NULL) | |
1560 | htab->elf.dynobj = abfd; | |
1561 | ||
1562 | dynobj = htab->elf.dynobj; | |
1563 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1564 | if (sreloc == NULL) | |
1565 | { | |
1566 | flagword flags; | |
1567 | ||
1568 | sreloc = bfd_make_section (dynobj, name); | |
1569 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1570 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1571 | if ((sec->flags & SEC_ALLOC) != 0) | |
1572 | flags |= SEC_ALLOC | SEC_LOAD; | |
1573 | if (sreloc == NULL | |
1574 | || !bfd_set_section_flags (dynobj, sreloc, flags) | |
1575 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) | |
1576 | return FALSE; | |
1577 | } | |
1578 | ||
1579 | elf_section_data (sec)->sreloc = sreloc; | |
1580 | } | |
1581 | ||
1582 | /* If this is a global symbol, we count the number of | |
1583 | relocations we need for this symbol. */ | |
1584 | if (h != NULL) | |
1585 | { | |
1586 | head = &h->dyn_relocs; | |
1587 | } | |
1588 | else | |
1589 | { | |
1590 | /* Track dynamic relocs needed for local syms too. | |
1591 | We really need local syms available to do this | |
1592 | easily. Oh well. */ | |
1593 | ||
1594 | asection *s; | |
1595 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1596 | sec, r_symndx); | |
1597 | if (s == NULL) | |
1598 | return FALSE; | |
1599 | ||
1600 | head = ((struct elf32_hppa_dyn_reloc_entry **) | |
1601 | &elf_section_data (s)->local_dynrel); | |
1602 | } | |
1603 | ||
1604 | p = *head; | |
1605 | if (p == NULL || p->sec != sec) | |
1606 | { | |
1607 | p = ((struct elf32_hppa_dyn_reloc_entry *) | |
1608 | bfd_alloc (htab->elf.dynobj, | |
1609 | (bfd_size_type) sizeof *p)); | |
1610 | if (p == NULL) | |
1611 | return FALSE; | |
1612 | p->next = *head; | |
1613 | *head = p; | |
1614 | p->sec = sec; | |
1615 | p->count = 0; | |
1616 | #if RELATIVE_DYNRELOCS | |
1617 | p->relative_count = 0; | |
1618 | #endif | |
1619 | } | |
1620 | ||
1621 | p->count += 1; | |
1622 | #if RELATIVE_DYNRELOCS | |
1623 | if (!IS_ABSOLUTE_RELOC (rtype)) | |
1624 | p->relative_count += 1; | |
1625 | #endif | |
1626 | } | |
1627 | } | |
1628 | } | |
1629 | ||
1630 | return TRUE; | |
1631 | } | |
1632 | ||
1633 | /* Return the section that should be marked against garbage collection | |
1634 | for a given relocation. */ | |
1635 | ||
1636 | static asection * | |
1637 | elf32_hppa_gc_mark_hook (sec, info, rel, h, sym) | |
1638 | asection *sec; | |
1639 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
1640 | Elf_Internal_Rela *rel; | |
1641 | struct elf_link_hash_entry *h; | |
1642 | Elf_Internal_Sym *sym; | |
1643 | { | |
1644 | if (h != NULL) | |
1645 | { | |
1646 | switch ((unsigned int) ELF32_R_TYPE (rel->r_info)) | |
1647 | { | |
1648 | case R_PARISC_GNU_VTINHERIT: | |
1649 | case R_PARISC_GNU_VTENTRY: | |
1650 | break; | |
1651 | ||
1652 | default: | |
1653 | switch (h->root.type) | |
1654 | { | |
1655 | case bfd_link_hash_defined: | |
1656 | case bfd_link_hash_defweak: | |
1657 | return h->root.u.def.section; | |
1658 | ||
1659 | case bfd_link_hash_common: | |
1660 | return h->root.u.c.p->section; | |
1661 | ||
1662 | default: | |
1663 | break; | |
1664 | } | |
1665 | } | |
1666 | } | |
1667 | else | |
1668 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
1669 | ||
1670 | return NULL; | |
1671 | } | |
1672 | ||
1673 | /* Update the got and plt entry reference counts for the section being | |
1674 | removed. */ | |
1675 | ||
1676 | static bfd_boolean | |
1677 | elf32_hppa_gc_sweep_hook (abfd, info, sec, relocs) | |
1678 | bfd *abfd; | |
1679 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
1680 | asection *sec; | |
1681 | const Elf_Internal_Rela *relocs; | |
1682 | { | |
1683 | Elf_Internal_Shdr *symtab_hdr; | |
1684 | struct elf_link_hash_entry **sym_hashes; | |
1685 | bfd_signed_vma *local_got_refcounts; | |
1686 | bfd_signed_vma *local_plt_refcounts; | |
1687 | const Elf_Internal_Rela *rel, *relend; | |
1688 | ||
1689 | elf_section_data (sec)->local_dynrel = NULL; | |
1690 | ||
1691 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1692 | sym_hashes = elf_sym_hashes (abfd); | |
1693 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1694 | local_plt_refcounts = local_got_refcounts; | |
1695 | if (local_plt_refcounts != NULL) | |
1696 | local_plt_refcounts += symtab_hdr->sh_info; | |
1697 | ||
1698 | relend = relocs + sec->reloc_count; | |
1699 | for (rel = relocs; rel < relend; rel++) | |
1700 | { | |
1701 | unsigned long r_symndx; | |
1702 | unsigned int r_type; | |
1703 | struct elf_link_hash_entry *h = NULL; | |
1704 | ||
1705 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1706 | if (r_symndx >= symtab_hdr->sh_info) | |
1707 | { | |
1708 | struct elf32_hppa_link_hash_entry *eh; | |
1709 | struct elf32_hppa_dyn_reloc_entry **pp; | |
1710 | struct elf32_hppa_dyn_reloc_entry *p; | |
1711 | ||
1712 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1713 | eh = (struct elf32_hppa_link_hash_entry *) h; | |
1714 | ||
1715 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1716 | if (p->sec == sec) | |
1717 | { | |
1718 | /* Everything must go for SEC. */ | |
1719 | *pp = p->next; | |
1720 | break; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | r_type = ELF32_R_TYPE (rel->r_info); | |
1725 | switch (r_type) | |
1726 | { | |
1727 | case R_PARISC_DLTIND14F: | |
1728 | case R_PARISC_DLTIND14R: | |
1729 | case R_PARISC_DLTIND21L: | |
1730 | if (h != NULL) | |
1731 | { | |
1732 | if (h->got.refcount > 0) | |
1733 | h->got.refcount -= 1; | |
1734 | } | |
1735 | else if (local_got_refcounts != NULL) | |
1736 | { | |
1737 | if (local_got_refcounts[r_symndx] > 0) | |
1738 | local_got_refcounts[r_symndx] -= 1; | |
1739 | } | |
1740 | break; | |
1741 | ||
1742 | case R_PARISC_PCREL12F: | |
1743 | case R_PARISC_PCREL17C: | |
1744 | case R_PARISC_PCREL17F: | |
1745 | case R_PARISC_PCREL22F: | |
1746 | if (h != NULL) | |
1747 | { | |
1748 | if (h->plt.refcount > 0) | |
1749 | h->plt.refcount -= 1; | |
1750 | } | |
1751 | break; | |
1752 | ||
1753 | case R_PARISC_PLABEL14R: | |
1754 | case R_PARISC_PLABEL21L: | |
1755 | case R_PARISC_PLABEL32: | |
1756 | if (h != NULL) | |
1757 | { | |
1758 | if (h->plt.refcount > 0) | |
1759 | h->plt.refcount -= 1; | |
1760 | } | |
1761 | else if (local_plt_refcounts != NULL) | |
1762 | { | |
1763 | if (local_plt_refcounts[r_symndx] > 0) | |
1764 | local_plt_refcounts[r_symndx] -= 1; | |
1765 | } | |
1766 | break; | |
1767 | ||
1768 | default: | |
1769 | break; | |
1770 | } | |
1771 | } | |
1772 | ||
1773 | return TRUE; | |
1774 | } | |
1775 | ||
1776 | /* Our own version of hide_symbol, so that we can keep plt entries for | |
1777 | plabels. */ | |
1778 | ||
1779 | static void | |
1780 | elf32_hppa_hide_symbol (info, h, force_local) | |
1781 | struct bfd_link_info *info; | |
1782 | struct elf_link_hash_entry *h; | |
1783 | bfd_boolean force_local; | |
1784 | { | |
1785 | if (force_local) | |
1786 | { | |
1787 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; | |
1788 | if (h->dynindx != -1) | |
1789 | { | |
1790 | h->dynindx = -1; | |
1791 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
1792 | h->dynstr_index); | |
1793 | } | |
1794 | } | |
1795 | ||
1796 | if (! ((struct elf32_hppa_link_hash_entry *) h)->plabel) | |
1797 | { | |
1798 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
1799 | h->plt.offset = (bfd_vma) -1; | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | /* This is the condition under which elf32_hppa_finish_dynamic_symbol | |
1804 | will be called from elflink.h. If elflink.h doesn't call our | |
1805 | finish_dynamic_symbol routine, we'll need to do something about | |
1806 | initializing any .plt and .got entries in elf32_hppa_relocate_section. */ | |
1807 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ | |
1808 | ((DYN) \ | |
1809 | && ((INFO)->shared \ | |
1810 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
1811 | && ((H)->dynindx != -1 \ | |
1812 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1813 | ||
1814 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1815 | regular object. The current definition is in some section of the | |
1816 | dynamic object, but we're not including those sections. We have to | |
1817 | change the definition to something the rest of the link can | |
1818 | understand. */ | |
1819 | ||
1820 | static bfd_boolean | |
1821 | elf32_hppa_adjust_dynamic_symbol (info, h) | |
1822 | struct bfd_link_info *info; | |
1823 | struct elf_link_hash_entry *h; | |
1824 | { | |
1825 | struct elf32_hppa_link_hash_table *htab; | |
1826 | struct elf32_hppa_link_hash_entry *eh; | |
1827 | struct elf32_hppa_dyn_reloc_entry *p; | |
1828 | asection *s; | |
1829 | unsigned int power_of_two; | |
1830 | ||
1831 | /* If this is a function, put it in the procedure linkage table. We | |
1832 | will fill in the contents of the procedure linkage table later. */ | |
1833 | if (h->type == STT_FUNC | |
1834 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1835 | { | |
1836 | if (h->plt.refcount <= 0 | |
1837 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1838 | && h->root.type != bfd_link_hash_defweak | |
1839 | && ! ((struct elf32_hppa_link_hash_entry *) h)->plabel | |
1840 | && (!info->shared || info->symbolic))) | |
1841 | { | |
1842 | /* The .plt entry is not needed when: | |
1843 | a) Garbage collection has removed all references to the | |
1844 | symbol, or | |
1845 | b) We know for certain the symbol is defined in this | |
1846 | object, and it's not a weak definition, nor is the symbol | |
1847 | used by a plabel relocation. Either this object is the | |
1848 | application or we are doing a shared symbolic link. */ | |
1849 | ||
1850 | /* As a special sop to the hppa ABI, we keep a .plt entry | |
1851 | for functions in sections containing PIC code. */ | |
1852 | if (!info->shared | |
1853 | && h->plt.refcount > 0 | |
1854 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1855 | && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0) | |
1856 | ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1; | |
1857 | else | |
1858 | { | |
1859 | h->plt.offset = (bfd_vma) -1; | |
1860 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
1861 | } | |
1862 | } | |
1863 | ||
1864 | return TRUE; | |
1865 | } | |
1866 | else | |
1867 | h->plt.offset = (bfd_vma) -1; | |
1868 | ||
1869 | /* If this is a weak symbol, and there is a real definition, the | |
1870 | processor independent code will have arranged for us to see the | |
1871 | real definition first, and we can just use the same value. */ | |
1872 | if (h->weakdef != NULL) | |
1873 | { | |
1874 | if (h->weakdef->root.type != bfd_link_hash_defined | |
1875 | && h->weakdef->root.type != bfd_link_hash_defweak) | |
1876 | abort (); | |
1877 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1878 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
1879 | return TRUE; | |
1880 | } | |
1881 | ||
1882 | /* This is a reference to a symbol defined by a dynamic object which | |
1883 | is not a function. */ | |
1884 | ||
1885 | /* If we are creating a shared library, we must presume that the | |
1886 | only references to the symbol are via the global offset table. | |
1887 | For such cases we need not do anything here; the relocations will | |
1888 | be handled correctly by relocate_section. */ | |
1889 | if (info->shared) | |
1890 | return TRUE; | |
1891 | ||
1892 | /* If there are no references to this symbol that do not use the | |
1893 | GOT, we don't need to generate a copy reloc. */ | |
1894 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
1895 | return TRUE; | |
1896 | ||
1897 | eh = (struct elf32_hppa_link_hash_entry *) h; | |
1898 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1899 | { | |
1900 | s = p->sec->output_section; | |
1901 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1902 | break; | |
1903 | } | |
1904 | ||
1905 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1906 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1907 | if (p == NULL) | |
1908 | { | |
1909 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1910 | return TRUE; | |
1911 | } | |
1912 | ||
1913 | /* We must allocate the symbol in our .dynbss section, which will | |
1914 | become part of the .bss section of the executable. There will be | |
1915 | an entry for this symbol in the .dynsym section. The dynamic | |
1916 | object will contain position independent code, so all references | |
1917 | from the dynamic object to this symbol will go through the global | |
1918 | offset table. The dynamic linker will use the .dynsym entry to | |
1919 | determine the address it must put in the global offset table, so | |
1920 | both the dynamic object and the regular object will refer to the | |
1921 | same memory location for the variable. */ | |
1922 | ||
1923 | htab = hppa_link_hash_table (info); | |
1924 | ||
1925 | /* We must generate a COPY reloc to tell the dynamic linker to | |
1926 | copy the initial value out of the dynamic object and into the | |
1927 | runtime process image. */ | |
1928 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1929 | { | |
1930 | htab->srelbss->_raw_size += sizeof (Elf32_External_Rela); | |
1931 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
1932 | } | |
1933 | ||
1934 | /* We need to figure out the alignment required for this symbol. I | |
1935 | have no idea how other ELF linkers handle this. */ | |
1936 | ||
1937 | power_of_two = bfd_log2 (h->size); | |
1938 | if (power_of_two > 3) | |
1939 | power_of_two = 3; | |
1940 | ||
1941 | /* Apply the required alignment. */ | |
1942 | s = htab->sdynbss; | |
1943 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
1944 | (bfd_size_type) (1 << power_of_two)); | |
1945 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
1946 | { | |
1947 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) | |
1948 | return FALSE; | |
1949 | } | |
1950 | ||
1951 | /* Define the symbol as being at this point in the section. */ | |
1952 | h->root.u.def.section = s; | |
1953 | h->root.u.def.value = s->_raw_size; | |
1954 | ||
1955 | /* Increment the section size to make room for the symbol. */ | |
1956 | s->_raw_size += h->size; | |
1957 | ||
1958 | return TRUE; | |
1959 | } | |
1960 | ||
1961 | /* Called via elf_link_hash_traverse to create .plt entries for an | |
1962 | application that uses statically linked PIC functions. Similar to | |
1963 | the first part of elf32_hppa_adjust_dynamic_symbol. */ | |
1964 | ||
1965 | static bfd_boolean | |
1966 | mark_PIC_calls (h, inf) | |
1967 | struct elf_link_hash_entry *h; | |
1968 | PTR inf ATTRIBUTE_UNUSED; | |
1969 | { | |
1970 | if (h->root.type == bfd_link_hash_warning) | |
1971 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1972 | ||
1973 | if (! (h->plt.refcount > 0 | |
1974 | && (h->root.type == bfd_link_hash_defined | |
1975 | || h->root.type == bfd_link_hash_defweak) | |
1976 | && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0)) | |
1977 | { | |
1978 | h->plt.offset = (bfd_vma) -1; | |
1979 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
1980 | return TRUE; | |
1981 | } | |
1982 | ||
1983 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1984 | ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1; | |
1985 | ||
1986 | return TRUE; | |
1987 | } | |
1988 | ||
1989 | /* Allocate space in the .plt for entries that won't have relocations. | |
1990 | ie. pic_call and plabel entries. */ | |
1991 | ||
1992 | static bfd_boolean | |
1993 | allocate_plt_static (h, inf) | |
1994 | struct elf_link_hash_entry *h; | |
1995 | PTR inf; | |
1996 | { | |
1997 | struct bfd_link_info *info; | |
1998 | struct elf32_hppa_link_hash_table *htab; | |
1999 | asection *s; | |
2000 | ||
2001 | if (h->root.type == bfd_link_hash_indirect) | |
2002 | return TRUE; | |
2003 | ||
2004 | if (h->root.type == bfd_link_hash_warning) | |
2005 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2006 | ||
2007 | info = (struct bfd_link_info *) inf; | |
2008 | htab = hppa_link_hash_table (info); | |
2009 | if (((struct elf32_hppa_link_hash_entry *) h)->pic_call) | |
2010 | { | |
2011 | /* Make an entry in the .plt section for non-pic code that is | |
2012 | calling pic code. */ | |
2013 | ((struct elf32_hppa_link_hash_entry *) h)->plabel = 0; | |
2014 | s = htab->splt; | |
2015 | h->plt.offset = s->_raw_size; | |
2016 | s->_raw_size += PLT_ENTRY_SIZE; | |
2017 | } | |
2018 | else if (htab->elf.dynamic_sections_created | |
2019 | && h->plt.refcount > 0) | |
2020 | { | |
2021 | /* Make sure this symbol is output as a dynamic symbol. | |
2022 | Undefined weak syms won't yet be marked as dynamic. */ | |
2023 | if (h->dynindx == -1 | |
2024 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 | |
2025 | && h->type != STT_PARISC_MILLI) | |
2026 | { | |
2027 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2028 | return FALSE; | |
2029 | } | |
2030 | ||
2031 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) | |
2032 | { | |
2033 | /* Allocate these later. From this point on, h->plabel | |
2034 | means that the plt entry is only used by a plabel. | |
2035 | We'll be using a normal plt entry for this symbol, so | |
2036 | clear the plabel indicator. */ | |
2037 | ((struct elf32_hppa_link_hash_entry *) h)->plabel = 0; | |
2038 | } | |
2039 | else if (((struct elf32_hppa_link_hash_entry *) h)->plabel) | |
2040 | { | |
2041 | /* Make an entry in the .plt section for plabel references | |
2042 | that won't have a .plt entry for other reasons. */ | |
2043 | s = htab->splt; | |
2044 | h->plt.offset = s->_raw_size; | |
2045 | s->_raw_size += PLT_ENTRY_SIZE; | |
2046 | } | |
2047 | else | |
2048 | { | |
2049 | /* No .plt entry needed. */ | |
2050 | h->plt.offset = (bfd_vma) -1; | |
2051 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
2052 | } | |
2053 | } | |
2054 | else | |
2055 | { | |
2056 | h->plt.offset = (bfd_vma) -1; | |
2057 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
2058 | } | |
2059 | ||
2060 | return TRUE; | |
2061 | } | |
2062 | ||
2063 | /* Allocate space in .plt, .got and associated reloc sections for | |
2064 | global syms. */ | |
2065 | ||
2066 | static bfd_boolean | |
2067 | allocate_dynrelocs (h, inf) | |
2068 | struct elf_link_hash_entry *h; | |
2069 | PTR inf; | |
2070 | { | |
2071 | struct bfd_link_info *info; | |
2072 | struct elf32_hppa_link_hash_table *htab; | |
2073 | asection *s; | |
2074 | struct elf32_hppa_link_hash_entry *eh; | |
2075 | struct elf32_hppa_dyn_reloc_entry *p; | |
2076 | ||
2077 | if (h->root.type == bfd_link_hash_indirect) | |
2078 | return TRUE; | |
2079 | ||
2080 | if (h->root.type == bfd_link_hash_warning) | |
2081 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2082 | ||
2083 | info = (struct bfd_link_info *) inf; | |
2084 | htab = hppa_link_hash_table (info); | |
2085 | if (htab->elf.dynamic_sections_created | |
2086 | && h->plt.offset != (bfd_vma) -1 | |
2087 | && !((struct elf32_hppa_link_hash_entry *) h)->pic_call | |
2088 | && !((struct elf32_hppa_link_hash_entry *) h)->plabel) | |
2089 | { | |
2090 | /* Make an entry in the .plt section. */ | |
2091 | s = htab->splt; | |
2092 | h->plt.offset = s->_raw_size; | |
2093 | s->_raw_size += PLT_ENTRY_SIZE; | |
2094 | ||
2095 | /* We also need to make an entry in the .rela.plt section. */ | |
2096 | htab->srelplt->_raw_size += sizeof (Elf32_External_Rela); | |
2097 | htab->need_plt_stub = 1; | |
2098 | } | |
2099 | ||
2100 | if (h->got.refcount > 0) | |
2101 | { | |
2102 | /* Make sure this symbol is output as a dynamic symbol. | |
2103 | Undefined weak syms won't yet be marked as dynamic. */ | |
2104 | if (h->dynindx == -1 | |
2105 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 | |
2106 | && h->type != STT_PARISC_MILLI) | |
2107 | { | |
2108 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2109 | return FALSE; | |
2110 | } | |
2111 | ||
2112 | s = htab->sgot; | |
2113 | h->got.offset = s->_raw_size; | |
2114 | s->_raw_size += GOT_ENTRY_SIZE; | |
2115 | if (htab->elf.dynamic_sections_created | |
2116 | && (info->shared | |
2117 | || (h->dynindx != -1 | |
2118 | && h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)) | |
2119 | { | |
2120 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
2121 | } | |
2122 | } | |
2123 | else | |
2124 | h->got.offset = (bfd_vma) -1; | |
2125 | ||
2126 | eh = (struct elf32_hppa_link_hash_entry *) h; | |
2127 | if (eh->dyn_relocs == NULL) | |
2128 | return TRUE; | |
2129 | ||
2130 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
2131 | space allocated for dynamic pc-relative relocs against symbols | |
2132 | defined in a regular object. For the normal shared case, discard | |
2133 | space for relocs that have become local due to symbol visibility | |
2134 | changes. */ | |
2135 | if (info->shared) | |
2136 | { | |
2137 | #if RELATIVE_DYNRELOCS | |
2138 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
2139 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
2140 | || info->symbolic)) | |
2141 | { | |
2142 | struct elf32_hppa_dyn_reloc_entry **pp; | |
2143 | ||
2144 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2145 | { | |
2146 | p->count -= p->relative_count; | |
2147 | p->relative_count = 0; | |
2148 | if (p->count == 0) | |
2149 | *pp = p->next; | |
2150 | else | |
2151 | pp = &p->next; | |
2152 | } | |
2153 | } | |
2154 | #endif | |
2155 | } | |
2156 | else | |
2157 | { | |
2158 | /* For the non-shared case, discard space for relocs against | |
2159 | symbols which turn out to need copy relocs or are not | |
2160 | dynamic. */ | |
2161 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
2162 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2163 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2164 | || (htab->elf.dynamic_sections_created | |
2165 | && (h->root.type == bfd_link_hash_undefweak | |
2166 | || h->root.type == bfd_link_hash_undefined)))) | |
2167 | { | |
2168 | /* Make sure this symbol is output as a dynamic symbol. | |
2169 | Undefined weak syms won't yet be marked as dynamic. */ | |
2170 | if (h->dynindx == -1 | |
2171 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 | |
2172 | && h->type != STT_PARISC_MILLI) | |
2173 | { | |
2174 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
2175 | return FALSE; | |
2176 | } | |
2177 | ||
2178 | /* If that succeeded, we know we'll be keeping all the | |
2179 | relocs. */ | |
2180 | if (h->dynindx != -1) | |
2181 | goto keep; | |
2182 | } | |
2183 | ||
2184 | eh->dyn_relocs = NULL; | |
2185 | return TRUE; | |
2186 | ||
2187 | keep: ; | |
2188 | } | |
2189 | ||
2190 | /* Finally, allocate space. */ | |
2191 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2192 | { | |
2193 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
2194 | sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela); | |
2195 | } | |
2196 | ||
2197 | return TRUE; | |
2198 | } | |
2199 | ||
2200 | /* This function is called via elf_link_hash_traverse to force | |
2201 | millicode symbols local so they do not end up as globals in the | |
2202 | dynamic symbol table. We ought to be able to do this in | |
2203 | adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called | |
2204 | for all dynamic symbols. Arguably, this is a bug in | |
2205 | elf_adjust_dynamic_symbol. */ | |
2206 | ||
2207 | static bfd_boolean | |
2208 | clobber_millicode_symbols (h, info) | |
2209 | struct elf_link_hash_entry *h; | |
2210 | struct bfd_link_info *info; | |
2211 | { | |
2212 | if (h->root.type == bfd_link_hash_warning) | |
2213 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2214 | ||
2215 | if (h->type == STT_PARISC_MILLI | |
2216 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
2217 | { | |
2218 | elf32_hppa_hide_symbol (info, h, TRUE); | |
2219 | } | |
2220 | return TRUE; | |
2221 | } | |
2222 | ||
2223 | /* Find any dynamic relocs that apply to read-only sections. */ | |
2224 | ||
2225 | static bfd_boolean | |
2226 | readonly_dynrelocs (h, inf) | |
2227 | struct elf_link_hash_entry *h; | |
2228 | PTR inf; | |
2229 | { | |
2230 | struct elf32_hppa_link_hash_entry *eh; | |
2231 | struct elf32_hppa_dyn_reloc_entry *p; | |
2232 | ||
2233 | if (h->root.type == bfd_link_hash_warning) | |
2234 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2235 | ||
2236 | eh = (struct elf32_hppa_link_hash_entry *) h; | |
2237 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2238 | { | |
2239 | asection *s = p->sec->output_section; | |
2240 | ||
2241 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2242 | { | |
2243 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2244 | ||
2245 | info->flags |= DF_TEXTREL; | |
2246 | ||
2247 | /* Not an error, just cut short the traversal. */ | |
2248 | return FALSE; | |
2249 | } | |
2250 | } | |
2251 | return TRUE; | |
2252 | } | |
2253 | ||
2254 | /* Set the sizes of the dynamic sections. */ | |
2255 | ||
2256 | static bfd_boolean | |
2257 | elf32_hppa_size_dynamic_sections (output_bfd, info) | |
2258 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
2259 | struct bfd_link_info *info; | |
2260 | { | |
2261 | struct elf32_hppa_link_hash_table *htab; | |
2262 | bfd *dynobj; | |
2263 | bfd *ibfd; | |
2264 | asection *s; | |
2265 | bfd_boolean relocs; | |
2266 | ||
2267 | htab = hppa_link_hash_table (info); | |
2268 | dynobj = htab->elf.dynobj; | |
2269 | if (dynobj == NULL) | |
2270 | abort (); | |
2271 | ||
2272 | if (htab->elf.dynamic_sections_created) | |
2273 | { | |
2274 | /* Set the contents of the .interp section to the interpreter. */ | |
2275 | if (! info->shared) | |
2276 | { | |
2277 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2278 | if (s == NULL) | |
2279 | abort (); | |
2280 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
2281 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
2282 | } | |
2283 | ||
2284 | /* Force millicode symbols local. */ | |
2285 | elf_link_hash_traverse (&htab->elf, | |
2286 | clobber_millicode_symbols, | |
2287 | info); | |
2288 | } | |
2289 | else | |
2290 | { | |
2291 | /* Run through the function symbols, looking for any that are | |
2292 | PIC, and mark them as needing .plt entries so that %r19 will | |
2293 | be set up. */ | |
2294 | if (! info->shared) | |
2295 | elf_link_hash_traverse (&htab->elf, mark_PIC_calls, (PTR) info); | |
2296 | } | |
2297 | ||
2298 | /* Set up .got and .plt offsets for local syms, and space for local | |
2299 | dynamic relocs. */ | |
2300 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2301 | { | |
2302 | bfd_signed_vma *local_got; | |
2303 | bfd_signed_vma *end_local_got; | |
2304 | bfd_signed_vma *local_plt; | |
2305 | bfd_signed_vma *end_local_plt; | |
2306 | bfd_size_type locsymcount; | |
2307 | Elf_Internal_Shdr *symtab_hdr; | |
2308 | asection *srel; | |
2309 | ||
2310 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
2311 | continue; | |
2312 | ||
2313 | for (s = ibfd->sections; s != NULL; s = s->next) | |
2314 | { | |
2315 | struct elf32_hppa_dyn_reloc_entry *p; | |
2316 | ||
2317 | for (p = ((struct elf32_hppa_dyn_reloc_entry *) | |
2318 | elf_section_data (s)->local_dynrel); | |
2319 | p != NULL; | |
2320 | p = p->next) | |
2321 | { | |
2322 | if (!bfd_is_abs_section (p->sec) | |
2323 | && bfd_is_abs_section (p->sec->output_section)) | |
2324 | { | |
2325 | /* Input section has been discarded, either because | |
2326 | it is a copy of a linkonce section or due to | |
2327 | linker script /DISCARD/, so we'll be discarding | |
2328 | the relocs too. */ | |
2329 | } | |
2330 | else if (p->count != 0) | |
2331 | { | |
2332 | srel = elf_section_data (p->sec)->sreloc; | |
2333 | srel->_raw_size += p->count * sizeof (Elf32_External_Rela); | |
2334 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
2335 | info->flags |= DF_TEXTREL; | |
2336 | } | |
2337 | } | |
2338 | } | |
2339 | ||
2340 | local_got = elf_local_got_refcounts (ibfd); | |
2341 | if (!local_got) | |
2342 | continue; | |
2343 | ||
2344 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2345 | locsymcount = symtab_hdr->sh_info; | |
2346 | end_local_got = local_got + locsymcount; | |
2347 | s = htab->sgot; | |
2348 | srel = htab->srelgot; | |
2349 | for (; local_got < end_local_got; ++local_got) | |
2350 | { | |
2351 | if (*local_got > 0) | |
2352 | { | |
2353 | *local_got = s->_raw_size; | |
2354 | s->_raw_size += GOT_ENTRY_SIZE; | |
2355 | if (info->shared) | |
2356 | srel->_raw_size += sizeof (Elf32_External_Rela); | |
2357 | } | |
2358 | else | |
2359 | *local_got = (bfd_vma) -1; | |
2360 | } | |
2361 | ||
2362 | local_plt = end_local_got; | |
2363 | end_local_plt = local_plt + locsymcount; | |
2364 | if (! htab->elf.dynamic_sections_created) | |
2365 | { | |
2366 | /* Won't be used, but be safe. */ | |
2367 | for (; local_plt < end_local_plt; ++local_plt) | |
2368 | *local_plt = (bfd_vma) -1; | |
2369 | } | |
2370 | else | |
2371 | { | |
2372 | s = htab->splt; | |
2373 | srel = htab->srelplt; | |
2374 | for (; local_plt < end_local_plt; ++local_plt) | |
2375 | { | |
2376 | if (*local_plt > 0) | |
2377 | { | |
2378 | *local_plt = s->_raw_size; | |
2379 | s->_raw_size += PLT_ENTRY_SIZE; | |
2380 | if (info->shared) | |
2381 | srel->_raw_size += sizeof (Elf32_External_Rela); | |
2382 | } | |
2383 | else | |
2384 | *local_plt = (bfd_vma) -1; | |
2385 | } | |
2386 | } | |
2387 | } | |
2388 | ||
2389 | /* Do all the .plt entries without relocs first. The dynamic linker | |
2390 | uses the last .plt reloc to find the end of the .plt (and hence | |
2391 | the start of the .got) for lazy linking. */ | |
2392 | elf_link_hash_traverse (&htab->elf, allocate_plt_static, (PTR) info); | |
2393 | ||
2394 | /* Allocate global sym .plt and .got entries, and space for global | |
2395 | sym dynamic relocs. */ | |
2396 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2397 | ||
2398 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
2399 | determined the sizes of the various dynamic sections. Allocate | |
2400 | memory for them. */ | |
2401 | relocs = FALSE; | |
2402 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2403 | { | |
2404 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2405 | continue; | |
2406 | ||
2407 | if (s == htab->splt) | |
2408 | { | |
2409 | if (htab->need_plt_stub) | |
2410 | { | |
2411 | /* Make space for the plt stub at the end of the .plt | |
2412 | section. We want this stub right at the end, up | |
2413 | against the .got section. */ | |
2414 | int gotalign = bfd_section_alignment (dynobj, htab->sgot); | |
2415 | int pltalign = bfd_section_alignment (dynobj, s); | |
2416 | bfd_size_type mask; | |
2417 | ||
2418 | if (gotalign > pltalign) | |
2419 | bfd_set_section_alignment (dynobj, s, gotalign); | |
2420 | mask = ((bfd_size_type) 1 << gotalign) - 1; | |
2421 | s->_raw_size = (s->_raw_size + sizeof (plt_stub) + mask) & ~mask; | |
2422 | } | |
2423 | } | |
2424 | else if (s == htab->sgot) | |
2425 | ; | |
2426 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
2427 | { | |
2428 | if (s->_raw_size != 0) | |
2429 | { | |
2430 | /* Remember whether there are any reloc sections other | |
2431 | than .rela.plt. */ | |
2432 | if (s != htab->srelplt) | |
2433 | relocs = TRUE; | |
2434 | ||
2435 | /* We use the reloc_count field as a counter if we need | |
2436 | to copy relocs into the output file. */ | |
2437 | s->reloc_count = 0; | |
2438 | } | |
2439 | } | |
2440 | else | |
2441 | { | |
2442 | /* It's not one of our sections, so don't allocate space. */ | |
2443 | continue; | |
2444 | } | |
2445 | ||
2446 | if (s->_raw_size == 0) | |
2447 | { | |
2448 | /* If we don't need this section, strip it from the | |
2449 | output file. This is mostly to handle .rela.bss and | |
2450 | .rela.plt. We must create both sections in | |
2451 | create_dynamic_sections, because they must be created | |
2452 | before the linker maps input sections to output | |
2453 | sections. The linker does that before | |
2454 | adjust_dynamic_symbol is called, and it is that | |
2455 | function which decides whether anything needs to go | |
2456 | into these sections. */ | |
2457 | _bfd_strip_section_from_output (info, s); | |
2458 | continue; | |
2459 | } | |
2460 | ||
2461 | /* Allocate memory for the section contents. Zero it, because | |
2462 | we may not fill in all the reloc sections. */ | |
2463 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
2464 | if (s->contents == NULL && s->_raw_size != 0) | |
2465 | return FALSE; | |
2466 | } | |
2467 | ||
2468 | if (htab->elf.dynamic_sections_created) | |
2469 | { | |
2470 | /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It | |
2471 | actually has nothing to do with the PLT, it is how we | |
2472 | communicate the LTP value of a load module to the dynamic | |
2473 | linker. */ | |
2474 | #define add_dynamic_entry(TAG, VAL) \ | |
2475 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
2476 | ||
2477 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
2478 | return FALSE; | |
2479 | ||
2480 | /* Add some entries to the .dynamic section. We fill in the | |
2481 | values later, in elf32_hppa_finish_dynamic_sections, but we | |
2482 | must add the entries now so that we get the correct size for | |
2483 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2484 | dynamic linker and used by the debugger. */ | |
2485 | if (!info->shared) | |
2486 | { | |
2487 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
2488 | return FALSE; | |
2489 | } | |
2490 | ||
2491 | if (htab->srelplt->_raw_size != 0) | |
2492 | { | |
2493 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
2494 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2495 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
2496 | return FALSE; | |
2497 | } | |
2498 | ||
2499 | if (relocs) | |
2500 | { | |
2501 | if (!add_dynamic_entry (DT_RELA, 0) | |
2502 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2503 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
2504 | return FALSE; | |
2505 | ||
2506 | /* If any dynamic relocs apply to a read-only section, | |
2507 | then we need a DT_TEXTREL entry. */ | |
2508 | if ((info->flags & DF_TEXTREL) == 0) | |
2509 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2510 | (PTR) info); | |
2511 | ||
2512 | if ((info->flags & DF_TEXTREL) != 0) | |
2513 | { | |
2514 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
2515 | return FALSE; | |
2516 | } | |
2517 | } | |
2518 | } | |
2519 | #undef add_dynamic_entry | |
2520 | ||
2521 | return TRUE; | |
2522 | } | |
2523 | ||
2524 | /* External entry points for sizing and building linker stubs. */ | |
2525 | ||
2526 | /* Set up various things so that we can make a list of input sections | |
2527 | for each output section included in the link. Returns -1 on error, | |
2528 | 0 when no stubs will be needed, and 1 on success. */ | |
2529 | ||
2530 | int | |
2531 | elf32_hppa_setup_section_lists (output_bfd, info) | |
2532 | bfd *output_bfd; | |
2533 | struct bfd_link_info *info; | |
2534 | { | |
2535 | bfd *input_bfd; | |
2536 | unsigned int bfd_count; | |
2537 | int top_id, top_index; | |
2538 | asection *section; | |
2539 | asection **input_list, **list; | |
2540 | bfd_size_type amt; | |
2541 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); | |
2542 | ||
2543 | if (htab->elf.root.creator->flavour != bfd_target_elf_flavour) | |
2544 | return 0; | |
2545 | ||
2546 | /* Count the number of input BFDs and find the top input section id. */ | |
2547 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
2548 | input_bfd != NULL; | |
2549 | input_bfd = input_bfd->link_next) | |
2550 | { | |
2551 | bfd_count += 1; | |
2552 | for (section = input_bfd->sections; | |
2553 | section != NULL; | |
2554 | section = section->next) | |
2555 | { | |
2556 | if (top_id < section->id) | |
2557 | top_id = section->id; | |
2558 | } | |
2559 | } | |
2560 | htab->bfd_count = bfd_count; | |
2561 | ||
2562 | amt = sizeof (struct map_stub) * (top_id + 1); | |
2563 | htab->stub_group = (struct map_stub *) bfd_zmalloc (amt); | |
2564 | if (htab->stub_group == NULL) | |
2565 | return -1; | |
2566 | ||
2567 | /* We can't use output_bfd->section_count here to find the top output | |
2568 | section index as some sections may have been removed, and | |
2569 | _bfd_strip_section_from_output doesn't renumber the indices. */ | |
2570 | for (section = output_bfd->sections, top_index = 0; | |
2571 | section != NULL; | |
2572 | section = section->next) | |
2573 | { | |
2574 | if (top_index < section->index) | |
2575 | top_index = section->index; | |
2576 | } | |
2577 | ||
2578 | htab->top_index = top_index; | |
2579 | amt = sizeof (asection *) * (top_index + 1); | |
2580 | input_list = (asection **) bfd_malloc (amt); | |
2581 | htab->input_list = input_list; | |
2582 | if (input_list == NULL) | |
2583 | return -1; | |
2584 | ||
2585 | /* For sections we aren't interested in, mark their entries with a | |
2586 | value we can check later. */ | |
2587 | list = input_list + top_index; | |
2588 | do | |
2589 | *list = bfd_abs_section_ptr; | |
2590 | while (list-- != input_list); | |
2591 | ||
2592 | for (section = output_bfd->sections; | |
2593 | section != NULL; | |
2594 | section = section->next) | |
2595 | { | |
2596 | if ((section->flags & SEC_CODE) != 0) | |
2597 | input_list[section->index] = NULL; | |
2598 | } | |
2599 | ||
2600 | return 1; | |
2601 | } | |
2602 | ||
2603 | /* The linker repeatedly calls this function for each input section, | |
2604 | in the order that input sections are linked into output sections. | |
2605 | Build lists of input sections to determine groupings between which | |
2606 | we may insert linker stubs. */ | |
2607 | ||
2608 | void | |
2609 | elf32_hppa_next_input_section (info, isec) | |
2610 | struct bfd_link_info *info; | |
2611 | asection *isec; | |
2612 | { | |
2613 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); | |
2614 | ||
2615 | if (isec->output_section->index <= htab->top_index) | |
2616 | { | |
2617 | asection **list = htab->input_list + isec->output_section->index; | |
2618 | if (*list != bfd_abs_section_ptr) | |
2619 | { | |
2620 | /* Steal the link_sec pointer for our list. */ | |
2621 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) | |
2622 | /* This happens to make the list in reverse order, | |
2623 | which is what we want. */ | |
2624 | PREV_SEC (isec) = *list; | |
2625 | *list = isec; | |
2626 | } | |
2627 | } | |
2628 | } | |
2629 | ||
2630 | /* See whether we can group stub sections together. Grouping stub | |
2631 | sections may result in fewer stubs. More importantly, we need to | |
2632 | put all .init* and .fini* stubs at the beginning of the .init or | |
2633 | .fini output sections respectively, because glibc splits the | |
2634 | _init and _fini functions into multiple parts. Putting a stub in | |
2635 | the middle of a function is not a good idea. */ | |
2636 | ||
2637 | static void | |
2638 | group_sections (htab, stub_group_size, stubs_always_before_branch) | |
2639 | struct elf32_hppa_link_hash_table *htab; | |
2640 | bfd_size_type stub_group_size; | |
2641 | bfd_boolean stubs_always_before_branch; | |
2642 | { | |
2643 | asection **list = htab->input_list + htab->top_index; | |
2644 | do | |
2645 | { | |
2646 | asection *tail = *list; | |
2647 | if (tail == bfd_abs_section_ptr) | |
2648 | continue; | |
2649 | while (tail != NULL) | |
2650 | { | |
2651 | asection *curr; | |
2652 | asection *prev; | |
2653 | bfd_size_type total; | |
2654 | bfd_boolean big_sec; | |
2655 | ||
2656 | curr = tail; | |
2657 | if (tail->_cooked_size) | |
2658 | total = tail->_cooked_size; | |
2659 | else | |
2660 | total = tail->_raw_size; | |
2661 | big_sec = total >= stub_group_size; | |
2662 | ||
2663 | while ((prev = PREV_SEC (curr)) != NULL | |
2664 | && ((total += curr->output_offset - prev->output_offset) | |
2665 | < stub_group_size)) | |
2666 | curr = prev; | |
2667 | ||
2668 | /* OK, the size from the start of CURR to the end is less | |
2669 | than 240000 bytes and thus can be handled by one stub | |
2670 | section. (or the tail section is itself larger than | |
2671 | 240000 bytes, in which case we may be toast.) | |
2672 | We should really be keeping track of the total size of | |
2673 | stubs added here, as stubs contribute to the final output | |
2674 | section size. That's a little tricky, and this way will | |
2675 | only break if stubs added total more than 22144 bytes, or | |
2676 | 2768 long branch stubs. It seems unlikely for more than | |
2677 | 2768 different functions to be called, especially from | |
2678 | code only 240000 bytes long. This limit used to be | |
2679 | 250000, but c++ code tends to generate lots of little | |
2680 | functions, and sometimes violated the assumption. */ | |
2681 | do | |
2682 | { | |
2683 | prev = PREV_SEC (tail); | |
2684 | /* Set up this stub group. */ | |
2685 | htab->stub_group[tail->id].link_sec = curr; | |
2686 | } | |
2687 | while (tail != curr && (tail = prev) != NULL); | |
2688 | ||
2689 | /* But wait, there's more! Input sections up to 240000 | |
2690 | bytes before the stub section can be handled by it too. | |
2691 | Don't do this if we have a really large section after the | |
2692 | stubs, as adding more stubs increases the chance that | |
2693 | branches may not reach into the stub section. */ | |
2694 | if (!stubs_always_before_branch && !big_sec) | |
2695 | { | |
2696 | total = 0; | |
2697 | while (prev != NULL | |
2698 | && ((total += tail->output_offset - prev->output_offset) | |
2699 | < stub_group_size)) | |
2700 | { | |
2701 | tail = prev; | |
2702 | prev = PREV_SEC (tail); | |
2703 | htab->stub_group[tail->id].link_sec = curr; | |
2704 | } | |
2705 | } | |
2706 | tail = prev; | |
2707 | } | |
2708 | } | |
2709 | while (list-- != htab->input_list); | |
2710 | free (htab->input_list); | |
2711 | #undef PREV_SEC | |
2712 | } | |
2713 | ||
2714 | /* Read in all local syms for all input bfds, and create hash entries | |
2715 | for export stubs if we are building a multi-subspace shared lib. | |
2716 | Returns -1 on error, 1 if export stubs created, 0 otherwise. */ | |
2717 | ||
2718 | static int | |
2719 | get_local_syms (output_bfd, input_bfd, info) | |
2720 | bfd *output_bfd; | |
2721 | bfd *input_bfd; | |
2722 | struct bfd_link_info *info; | |
2723 | { | |
2724 | unsigned int bfd_indx; | |
2725 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
2726 | int stub_changed = 0; | |
2727 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); | |
2728 | ||
2729 | /* We want to read in symbol extension records only once. To do this | |
2730 | we need to read in the local symbols in parallel and save them for | |
2731 | later use; so hold pointers to the local symbols in an array. */ | |
2732 | bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; | |
2733 | all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); | |
2734 | htab->all_local_syms = all_local_syms; | |
2735 | if (all_local_syms == NULL) | |
2736 | return -1; | |
2737 | ||
2738 | /* Walk over all the input BFDs, swapping in local symbols. | |
2739 | If we are creating a shared library, create hash entries for the | |
2740 | export stubs. */ | |
2741 | for (bfd_indx = 0; | |
2742 | input_bfd != NULL; | |
2743 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2744 | { | |
2745 | Elf_Internal_Shdr *symtab_hdr; | |
2746 | ||
2747 | /* We'll need the symbol table in a second. */ | |
2748 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2749 | if (symtab_hdr->sh_info == 0) | |
2750 | continue; | |
2751 | ||
2752 | /* We need an array of the local symbols attached to the input bfd. */ | |
2753 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2754 | if (local_syms == NULL) | |
2755 | { | |
2756 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2757 | symtab_hdr->sh_info, 0, | |
2758 | NULL, NULL, NULL); | |
2759 | /* Cache them for elf_link_input_bfd. */ | |
2760 | symtab_hdr->contents = (unsigned char *) local_syms; | |
2761 | } | |
2762 | if (local_syms == NULL) | |
2763 | return -1; | |
2764 | ||
2765 | all_local_syms[bfd_indx] = local_syms; | |
2766 | ||
2767 | if (info->shared && htab->multi_subspace) | |
2768 | { | |
2769 | struct elf_link_hash_entry **sym_hashes; | |
2770 | struct elf_link_hash_entry **end_hashes; | |
2771 | unsigned int symcount; | |
2772 | ||
2773 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
2774 | - symtab_hdr->sh_info); | |
2775 | sym_hashes = elf_sym_hashes (input_bfd); | |
2776 | end_hashes = sym_hashes + symcount; | |
2777 | ||
2778 | /* Look through the global syms for functions; We need to | |
2779 | build export stubs for all globally visible functions. */ | |
2780 | for (; sym_hashes < end_hashes; sym_hashes++) | |
2781 | { | |
2782 | struct elf32_hppa_link_hash_entry *hash; | |
2783 | ||
2784 | hash = (struct elf32_hppa_link_hash_entry *) *sym_hashes; | |
2785 | ||
2786 | while (hash->elf.root.type == bfd_link_hash_indirect | |
2787 | || hash->elf.root.type == bfd_link_hash_warning) | |
2788 | hash = ((struct elf32_hppa_link_hash_entry *) | |
2789 | hash->elf.root.u.i.link); | |
2790 | ||
2791 | /* At this point in the link, undefined syms have been | |
2792 | resolved, so we need to check that the symbol was | |
2793 | defined in this BFD. */ | |
2794 | if ((hash->elf.root.type == bfd_link_hash_defined | |
2795 | || hash->elf.root.type == bfd_link_hash_defweak) | |
2796 | && hash->elf.type == STT_FUNC | |
2797 | && hash->elf.root.u.def.section->output_section != NULL | |
2798 | && (hash->elf.root.u.def.section->output_section->owner | |
2799 | == output_bfd) | |
2800 | && hash->elf.root.u.def.section->owner == input_bfd | |
2801 | && (hash->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) | |
2802 | && !(hash->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) | |
2803 | && ELF_ST_VISIBILITY (hash->elf.other) == STV_DEFAULT) | |
2804 | { | |
2805 | asection *sec; | |
2806 | const char *stub_name; | |
2807 | struct elf32_hppa_stub_hash_entry *stub_entry; | |
2808 | ||
2809 | sec = hash->elf.root.u.def.section; | |
2810 | stub_name = hash->elf.root.root.string; | |
2811 | stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table, | |
2812 | stub_name, | |
2813 | FALSE, FALSE); | |
2814 | if (stub_entry == NULL) | |
2815 | { | |
2816 | stub_entry = hppa_add_stub (stub_name, sec, htab); | |
2817 | if (!stub_entry) | |
2818 | return -1; | |
2819 | ||
2820 | stub_entry->target_value = hash->elf.root.u.def.value; | |
2821 | stub_entry->target_section = hash->elf.root.u.def.section; | |
2822 | stub_entry->stub_type = hppa_stub_export; | |
2823 | stub_entry->h = hash; | |
2824 | stub_changed = 1; | |
2825 | } | |
2826 | else | |
2827 | { | |
2828 | (*_bfd_error_handler) (_("%s: duplicate export stub %s"), | |
2829 | bfd_archive_filename (input_bfd), | |
2830 | stub_name); | |
2831 | } | |
2832 | } | |
2833 | } | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | return stub_changed; | |
2838 | } | |
2839 | ||
2840 | /* Determine and set the size of the stub section for a final link. | |
2841 | ||
2842 | The basic idea here is to examine all the relocations looking for | |
2843 | PC-relative calls to a target that is unreachable with a "bl" | |
2844 | instruction. */ | |
2845 | ||
2846 | bfd_boolean | |
2847 | elf32_hppa_size_stubs (output_bfd, stub_bfd, info, multi_subspace, group_size, | |
2848 | add_stub_section, layout_sections_again) | |
2849 | bfd *output_bfd; | |
2850 | bfd *stub_bfd; | |
2851 | struct bfd_link_info *info; | |
2852 | bfd_boolean multi_subspace; | |
2853 | bfd_signed_vma group_size; | |
2854 | asection * (*add_stub_section) PARAMS ((const char *, asection *)); | |
2855 | void (*layout_sections_again) PARAMS ((void)); | |
2856 | { | |
2857 | bfd_size_type stub_group_size; | |
2858 | bfd_boolean stubs_always_before_branch; | |
2859 | bfd_boolean stub_changed; | |
2860 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); | |
2861 | ||
2862 | /* Stash our params away. */ | |
2863 | htab->stub_bfd = stub_bfd; | |
2864 | htab->multi_subspace = multi_subspace; | |
2865 | htab->add_stub_section = add_stub_section; | |
2866 | htab->layout_sections_again = layout_sections_again; | |
2867 | stubs_always_before_branch = group_size < 0; | |
2868 | if (group_size < 0) | |
2869 | stub_group_size = -group_size; | |
2870 | else | |
2871 | stub_group_size = group_size; | |
2872 | if (stub_group_size == 1) | |
2873 | { | |
2874 | /* Default values. */ | |
2875 | if (stubs_always_before_branch) | |
2876 | { | |
2877 | stub_group_size = 7680000; | |
2878 | if (htab->has_17bit_branch || htab->multi_subspace) | |
2879 | stub_group_size = 240000; | |
2880 | if (htab->has_12bit_branch) | |
2881 | stub_group_size = 7500; | |
2882 | } | |
2883 | else | |
2884 | { | |
2885 | stub_group_size = 6971392; | |
2886 | if (htab->has_17bit_branch || htab->multi_subspace) | |
2887 | stub_group_size = 217856; | |
2888 | if (htab->has_12bit_branch) | |
2889 | stub_group_size = 6808; | |
2890 | } | |
2891 | } | |
2892 | ||
2893 | group_sections (htab, stub_group_size, stubs_always_before_branch); | |
2894 | ||
2895 | switch (get_local_syms (output_bfd, info->input_bfds, info)) | |
2896 | { | |
2897 | default: | |
2898 | if (htab->all_local_syms) | |
2899 | goto error_ret_free_local; | |
2900 | return FALSE; | |
2901 | ||
2902 | case 0: | |
2903 | stub_changed = FALSE; | |
2904 | break; | |
2905 | ||
2906 | case 1: | |
2907 | stub_changed = TRUE; | |
2908 | break; | |
2909 | } | |
2910 | ||
2911 | while (1) | |
2912 | { | |
2913 | bfd *input_bfd; | |
2914 | unsigned int bfd_indx; | |
2915 | asection *stub_sec; | |
2916 | ||
2917 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
2918 | input_bfd != NULL; | |
2919 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2920 | { | |
2921 | Elf_Internal_Shdr *symtab_hdr; | |
2922 | asection *section; | |
2923 | Elf_Internal_Sym *local_syms; | |
2924 | ||
2925 | /* We'll need the symbol table in a second. */ | |
2926 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2927 | if (symtab_hdr->sh_info == 0) | |
2928 | continue; | |
2929 | ||
2930 | local_syms = htab->all_local_syms[bfd_indx]; | |
2931 | ||
2932 | /* Walk over each section attached to the input bfd. */ | |
2933 | for (section = input_bfd->sections; | |
2934 | section != NULL; | |
2935 | section = section->next) | |
2936 | { | |
2937 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2938 | ||
2939 | /* If there aren't any relocs, then there's nothing more | |
2940 | to do. */ | |
2941 | if ((section->flags & SEC_RELOC) == 0 | |
2942 | || section->reloc_count == 0) | |
2943 | continue; | |
2944 | ||
2945 | /* If this section is a link-once section that will be | |
2946 | discarded, then don't create any stubs. */ | |
2947 | if (section->output_section == NULL | |
2948 | || section->output_section->owner != output_bfd) | |
2949 | continue; | |
2950 | ||
2951 | /* Get the relocs. */ | |
2952 | internal_relocs | |
2953 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, | |
2954 | (Elf_Internal_Rela *) NULL, | |
2955 | info->keep_memory); | |
2956 | if (internal_relocs == NULL) | |
2957 | goto error_ret_free_local; | |
2958 | ||
2959 | /* Now examine each relocation. */ | |
2960 | irela = internal_relocs; | |
2961 | irelaend = irela + section->reloc_count; | |
2962 | for (; irela < irelaend; irela++) | |
2963 | { | |
2964 | unsigned int r_type, r_indx; | |
2965 | enum elf32_hppa_stub_type stub_type; | |
2966 | struct elf32_hppa_stub_hash_entry *stub_entry; | |
2967 | asection *sym_sec; | |
2968 | bfd_vma sym_value; | |
2969 | bfd_vma destination; | |
2970 | struct elf32_hppa_link_hash_entry *hash; | |
2971 | char *stub_name; | |
2972 | const asection *id_sec; | |
2973 | ||
2974 | r_type = ELF32_R_TYPE (irela->r_info); | |
2975 | r_indx = ELF32_R_SYM (irela->r_info); | |
2976 | ||
2977 | if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) | |
2978 | { | |
2979 | bfd_set_error (bfd_error_bad_value); | |
2980 | error_ret_free_internal: | |
2981 | if (elf_section_data (section)->relocs == NULL) | |
2982 | free (internal_relocs); | |
2983 | goto error_ret_free_local; | |
2984 | } | |
2985 | ||
2986 | /* Only look for stubs on call instructions. */ | |
2987 | if (r_type != (unsigned int) R_PARISC_PCREL12F | |
2988 | && r_type != (unsigned int) R_PARISC_PCREL17F | |
2989 | && r_type != (unsigned int) R_PARISC_PCREL22F) | |
2990 | continue; | |
2991 | ||
2992 | /* Now determine the call target, its name, value, | |
2993 | section. */ | |
2994 | sym_sec = NULL; | |
2995 | sym_value = 0; | |
2996 | destination = 0; | |
2997 | hash = NULL; | |
2998 | if (r_indx < symtab_hdr->sh_info) | |
2999 | { | |
3000 | /* It's a local symbol. */ | |
3001 | Elf_Internal_Sym *sym; | |
3002 | Elf_Internal_Shdr *hdr; | |
3003 | ||
3004 | sym = local_syms + r_indx; | |
3005 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
3006 | sym_sec = hdr->bfd_section; | |
3007 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
3008 | sym_value = sym->st_value; | |
3009 | destination = (sym_value + irela->r_addend | |
3010 | + sym_sec->output_offset | |
3011 | + sym_sec->output_section->vma); | |
3012 | } | |
3013 | else | |
3014 | { | |
3015 | /* It's an external symbol. */ | |
3016 | int e_indx; | |
3017 | ||
3018 | e_indx = r_indx - symtab_hdr->sh_info; | |
3019 | hash = ((struct elf32_hppa_link_hash_entry *) | |
3020 | elf_sym_hashes (input_bfd)[e_indx]); | |
3021 | ||
3022 | while (hash->elf.root.type == bfd_link_hash_indirect | |
3023 | || hash->elf.root.type == bfd_link_hash_warning) | |
3024 | hash = ((struct elf32_hppa_link_hash_entry *) | |
3025 | hash->elf.root.u.i.link); | |
3026 | ||
3027 | if (hash->elf.root.type == bfd_link_hash_defined | |
3028 | || hash->elf.root.type == bfd_link_hash_defweak) | |
3029 | { | |
3030 | sym_sec = hash->elf.root.u.def.section; | |
3031 | sym_value = hash->elf.root.u.def.value; | |
3032 | if (sym_sec->output_section != NULL) | |
3033 | destination = (sym_value + irela->r_addend | |
3034 | + sym_sec->output_offset | |
3035 | + sym_sec->output_section->vma); | |
3036 | } | |
3037 | else if (hash->elf.root.type == bfd_link_hash_undefweak) | |
3038 | { | |
3039 | if (! info->shared) | |
3040 | continue; | |
3041 | } | |
3042 | else if (hash->elf.root.type == bfd_link_hash_undefined) | |
3043 | { | |
3044 | if (! (info->shared | |
3045 | && !info->no_undefined | |
3046 | && (ELF_ST_VISIBILITY (hash->elf.other) | |
3047 | == STV_DEFAULT) | |
3048 | && hash->elf.type != STT_PARISC_MILLI)) | |
3049 | continue; | |
3050 | } | |
3051 | else | |
3052 | { | |
3053 | bfd_set_error (bfd_error_bad_value); | |
3054 | goto error_ret_free_internal; | |
3055 | } | |
3056 | } | |
3057 | ||
3058 | /* Determine what (if any) linker stub is needed. */ | |
3059 | stub_type = hppa_type_of_stub (section, irela, hash, | |
3060 | destination); | |
3061 | if (stub_type == hppa_stub_none) | |
3062 | continue; | |
3063 | ||
3064 | /* Support for grouping stub sections. */ | |
3065 | id_sec = htab->stub_group[section->id].link_sec; | |
3066 | ||
3067 | /* Get the name of this stub. */ | |
3068 | stub_name = hppa_stub_name (id_sec, sym_sec, hash, irela); | |
3069 | if (!stub_name) | |
3070 | goto error_ret_free_internal; | |
3071 | ||
3072 | stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table, | |
3073 | stub_name, | |
3074 | FALSE, FALSE); | |
3075 | if (stub_entry != NULL) | |
3076 | { | |
3077 | /* The proper stub has already been created. */ | |
3078 | free (stub_name); | |
3079 | continue; | |
3080 | } | |
3081 | ||
3082 | stub_entry = hppa_add_stub (stub_name, section, htab); | |
3083 | if (stub_entry == NULL) | |
3084 | { | |
3085 | free (stub_name); | |
3086 | goto error_ret_free_internal; | |
3087 | } | |
3088 | ||
3089 | stub_entry->target_value = sym_value; | |
3090 | stub_entry->target_section = sym_sec; | |
3091 | stub_entry->stub_type = stub_type; | |
3092 | if (info->shared) | |
3093 | { | |
3094 | if (stub_type == hppa_stub_import) | |
3095 | stub_entry->stub_type = hppa_stub_import_shared; | |
3096 | else if (stub_type == hppa_stub_long_branch) | |
3097 | stub_entry->stub_type = hppa_stub_long_branch_shared; | |
3098 | } | |
3099 | stub_entry->h = hash; | |
3100 | stub_changed = TRUE; | |
3101 | } | |
3102 | ||
3103 | /* We're done with the internal relocs, free them. */ | |
3104 | if (elf_section_data (section)->relocs == NULL) | |
3105 | free (internal_relocs); | |
3106 | } | |
3107 | } | |
3108 | ||
3109 | if (!stub_changed) | |
3110 | break; | |
3111 | ||
3112 | /* OK, we've added some stubs. Find out the new size of the | |
3113 | stub sections. */ | |
3114 | for (stub_sec = htab->stub_bfd->sections; | |
3115 | stub_sec != NULL; | |
3116 | stub_sec = stub_sec->next) | |
3117 | { | |
3118 | stub_sec->_raw_size = 0; | |
3119 | stub_sec->_cooked_size = 0; | |
3120 | } | |
3121 | ||
3122 | bfd_hash_traverse (&htab->stub_hash_table, hppa_size_one_stub, htab); | |
3123 | ||
3124 | /* Ask the linker to do its stuff. */ | |
3125 | (*htab->layout_sections_again) (); | |
3126 | stub_changed = FALSE; | |
3127 | } | |
3128 | ||
3129 | free (htab->all_local_syms); | |
3130 | return TRUE; | |
3131 | ||
3132 | error_ret_free_local: | |
3133 | free (htab->all_local_syms); | |
3134 | return FALSE; | |
3135 | } | |
3136 | ||
3137 | /* For a final link, this function is called after we have sized the | |
3138 | stubs to provide a value for __gp. */ | |
3139 | ||
3140 | bfd_boolean | |
3141 | elf32_hppa_set_gp (abfd, info) | |
3142 | bfd *abfd; | |
3143 | struct bfd_link_info *info; | |
3144 | { | |
3145 | struct bfd_link_hash_entry *h; | |
3146 | asection *sec = NULL; | |
3147 | bfd_vma gp_val = 0; | |
3148 | struct elf32_hppa_link_hash_table *htab; | |
3149 | ||
3150 | htab = hppa_link_hash_table (info); | |
3151 | h = bfd_link_hash_lookup (&htab->elf.root, "$global$", FALSE, FALSE, FALSE); | |
3152 | ||
3153 | if (h != NULL | |
3154 | && (h->type == bfd_link_hash_defined | |
3155 | || h->type == bfd_link_hash_defweak)) | |
3156 | { | |
3157 | gp_val = h->u.def.value; | |
3158 | sec = h->u.def.section; | |
3159 | } | |
3160 | else | |
3161 | { | |
3162 | asection *splt; | |
3163 | asection *sgot; | |
3164 | ||
3165 | if (htab->elf.root.creator->flavour == bfd_target_elf_flavour) | |
3166 | { | |
3167 | splt = htab->splt; | |
3168 | sgot = htab->sgot; | |
3169 | } | |
3170 | else | |
3171 | { | |
3172 | /* If we're not elf, look up the output sections in the | |
3173 | hope we may actually find them. */ | |
3174 | splt = bfd_get_section_by_name (abfd, ".plt"); | |
3175 | sgot = bfd_get_section_by_name (abfd, ".got"); | |
3176 | } | |
3177 | ||
3178 | /* Choose to point our LTP at, in this order, one of .plt, .got, | |
3179 | or .data, if these sections exist. In the case of choosing | |
3180 | .plt try to make the LTP ideal for addressing anywhere in the | |
3181 | .plt or .got with a 14 bit signed offset. Typically, the end | |
3182 | of the .plt is the start of the .got, so choose .plt + 0x2000 | |
3183 | if either the .plt or .got is larger than 0x2000. If both | |
3184 | the .plt and .got are smaller than 0x2000, choose the end of | |
3185 | the .plt section. */ | |
3186 | sec = splt; | |
3187 | if (sec != NULL) | |
3188 | { | |
3189 | gp_val = sec->_raw_size; | |
3190 | if (gp_val > 0x2000 || (sgot && sgot->_raw_size > 0x2000)) | |
3191 | { | |
3192 | gp_val = 0x2000; | |
3193 | } | |
3194 | } | |
3195 | else | |
3196 | { | |
3197 | sec = sgot; | |
3198 | if (sec != NULL) | |
3199 | { | |
3200 | /* We know we don't have a .plt. If .got is large, | |
3201 | offset our LTP. */ | |
3202 | if (sec->_raw_size > 0x2000) | |
3203 | gp_val = 0x2000; | |
3204 | } | |
3205 | else | |
3206 | { | |
3207 | /* No .plt or .got. Who cares what the LTP is? */ | |
3208 | sec = bfd_get_section_by_name (abfd, ".data"); | |
3209 | } | |
3210 | } | |
3211 | ||
3212 | if (h != NULL) | |
3213 | { | |
3214 | h->type = bfd_link_hash_defined; | |
3215 | h->u.def.value = gp_val; | |
3216 | if (sec != NULL) | |
3217 | h->u.def.section = sec; | |
3218 | else | |
3219 | h->u.def.section = bfd_abs_section_ptr; | |
3220 | } | |
3221 | } | |
3222 | ||
3223 | if (sec != NULL && sec->output_section != NULL) | |
3224 | gp_val += sec->output_section->vma + sec->output_offset; | |
3225 | ||
3226 | elf_gp (abfd) = gp_val; | |
3227 | return TRUE; | |
3228 | } | |
3229 | ||
3230 | /* Build all the stubs associated with the current output file. The | |
3231 | stubs are kept in a hash table attached to the main linker hash | |
3232 | table. We also set up the .plt entries for statically linked PIC | |
3233 | functions here. This function is called via hppaelf_finish in the | |
3234 | linker. */ | |
3235 | ||
3236 | bfd_boolean | |
3237 | elf32_hppa_build_stubs (info) | |
3238 | struct bfd_link_info *info; | |
3239 | { | |
3240 | asection *stub_sec; | |
3241 | struct bfd_hash_table *table; | |
3242 | struct elf32_hppa_link_hash_table *htab; | |
3243 | ||
3244 | htab = hppa_link_hash_table (info); | |
3245 | ||
3246 | for (stub_sec = htab->stub_bfd->sections; | |
3247 | stub_sec != NULL; | |
3248 | stub_sec = stub_sec->next) | |
3249 | { | |
3250 | bfd_size_type size; | |
3251 | ||
3252 | /* Allocate memory to hold the linker stubs. */ | |
3253 | size = stub_sec->_raw_size; | |
3254 | stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); | |
3255 | if (stub_sec->contents == NULL && size != 0) | |
3256 | return FALSE; | |
3257 | stub_sec->_raw_size = 0; | |
3258 | } | |
3259 | ||
3260 | /* Build the stubs as directed by the stub hash table. */ | |
3261 | table = &htab->stub_hash_table; | |
3262 | bfd_hash_traverse (table, hppa_build_one_stub, info); | |
3263 | ||
3264 | return TRUE; | |
3265 | } | |
3266 | ||
3267 | /* Perform a final link. */ | |
3268 | ||
3269 | static bfd_boolean | |
3270 | elf32_hppa_final_link (abfd, info) | |
3271 | bfd *abfd; | |
3272 | struct bfd_link_info *info; | |
3273 | { | |
3274 | /* Invoke the regular ELF linker to do all the work. */ | |
3275 | if (!bfd_elf32_bfd_final_link (abfd, info)) | |
3276 | return FALSE; | |
3277 | ||
3278 | /* If we're producing a final executable, sort the contents of the | |
3279 | unwind section. */ | |
3280 | return elf_hppa_sort_unwind (abfd); | |
3281 | } | |
3282 | ||
3283 | /* Record the lowest address for the data and text segments. */ | |
3284 | ||
3285 | static void | |
3286 | hppa_record_segment_addr (abfd, section, data) | |
3287 | bfd *abfd ATTRIBUTE_UNUSED; | |
3288 | asection *section; | |
3289 | PTR data; | |
3290 | { | |
3291 | struct elf32_hppa_link_hash_table *htab; | |
3292 | ||
3293 | htab = (struct elf32_hppa_link_hash_table *) data; | |
3294 | ||
3295 | if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) | |
3296 | { | |
3297 | bfd_vma value = section->vma - section->filepos; | |
3298 | ||
3299 | if ((section->flags & SEC_READONLY) != 0) | |
3300 | { | |
3301 | if (value < htab->text_segment_base) | |
3302 | htab->text_segment_base = value; | |
3303 | } | |
3304 | else | |
3305 | { | |
3306 | if (value < htab->data_segment_base) | |
3307 | htab->data_segment_base = value; | |
3308 | } | |
3309 | } | |
3310 | } | |
3311 | ||
3312 | /* Perform a relocation as part of a final link. */ | |
3313 | ||
3314 | static bfd_reloc_status_type | |
3315 | final_link_relocate (input_section, contents, rel, value, htab, sym_sec, h) | |
3316 | asection *input_section; | |
3317 | bfd_byte *contents; | |
3318 | const Elf_Internal_Rela *rel; | |
3319 | bfd_vma value; | |
3320 | struct elf32_hppa_link_hash_table *htab; | |
3321 | asection *sym_sec; | |
3322 | struct elf32_hppa_link_hash_entry *h; | |
3323 | { | |
3324 | int insn; | |
3325 | unsigned int r_type = ELF32_R_TYPE (rel->r_info); | |
3326 | reloc_howto_type *howto = elf_hppa_howto_table + r_type; | |
3327 | int r_format = howto->bitsize; | |
3328 | enum hppa_reloc_field_selector_type_alt r_field; | |
3329 | bfd *input_bfd = input_section->owner; | |
3330 | bfd_vma offset = rel->r_offset; | |
3331 | bfd_vma max_branch_offset = 0; | |
3332 | bfd_byte *hit_data = contents + offset; | |
3333 | bfd_signed_vma addend = rel->r_addend; | |
3334 | bfd_vma location; | |
3335 | struct elf32_hppa_stub_hash_entry *stub_entry = NULL; | |
3336 | int val; | |
3337 | ||
3338 | if (r_type == R_PARISC_NONE) | |
3339 | return bfd_reloc_ok; | |
3340 | ||
3341 | insn = bfd_get_32 (input_bfd, hit_data); | |
3342 | ||
3343 | /* Find out where we are and where we're going. */ | |
3344 | location = (offset + | |
3345 | input_section->output_offset + | |
3346 | input_section->output_section->vma); | |
3347 | ||
3348 | switch (r_type) | |
3349 | { | |
3350 | case R_PARISC_PCREL12F: | |
3351 | case R_PARISC_PCREL17F: | |
3352 | case R_PARISC_PCREL22F: | |
3353 | /* If this call should go via the plt, find the import stub in | |
3354 | the stub hash. */ | |
3355 | if (sym_sec == NULL | |
3356 | || sym_sec->output_section == NULL | |
3357 | || (h != NULL | |
3358 | && h->elf.plt.offset != (bfd_vma) -1 | |
3359 | && (h->elf.dynindx != -1 || h->pic_call) | |
3360 | && !h->plabel)) | |
3361 | { | |
3362 | stub_entry = hppa_get_stub_entry (input_section, sym_sec, | |
3363 | h, rel, htab); | |
3364 | if (stub_entry != NULL) | |
3365 | { | |
3366 | value = (stub_entry->stub_offset | |
3367 | + stub_entry->stub_sec->output_offset | |
3368 | + stub_entry->stub_sec->output_section->vma); | |
3369 | addend = 0; | |
3370 | } | |
3371 | else if (sym_sec == NULL && h != NULL | |
3372 | && h->elf.root.type == bfd_link_hash_undefweak) | |
3373 | { | |
3374 | /* It's OK if undefined weak. Calls to undefined weak | |
3375 | symbols behave as if the "called" function | |
3376 | immediately returns. We can thus call to a weak | |
3377 | function without first checking whether the function | |
3378 | is defined. */ | |
3379 | value = location; | |
3380 | addend = 8; | |
3381 | } | |
3382 | else | |
3383 | return bfd_reloc_undefined; | |
3384 | } | |
3385 | /* Fall thru. */ | |
3386 | ||
3387 | case R_PARISC_PCREL21L: | |
3388 | case R_PARISC_PCREL17C: | |
3389 | case R_PARISC_PCREL17R: | |
3390 | case R_PARISC_PCREL14R: | |
3391 | case R_PARISC_PCREL14F: | |
3392 | /* Make it a pc relative offset. */ | |
3393 | value -= location; | |
3394 | addend -= 8; | |
3395 | break; | |
3396 | ||
3397 | case R_PARISC_DPREL21L: | |
3398 | case R_PARISC_DPREL14R: | |
3399 | case R_PARISC_DPREL14F: | |
3400 | /* For all the DP relative relocations, we need to examine the symbol's | |
3401 | section. If it has no section or if it's a code section, then | |
3402 | "data pointer relative" makes no sense. In that case we don't | |
3403 | adjust the "value", and for 21 bit addil instructions, we change the | |
3404 | source addend register from %dp to %r0. This situation commonly | |
3405 | arises for undefined weak symbols and when a variable's "constness" | |
3406 | is declared differently from the way the variable is defined. For | |
3407 | instance: "extern int foo" with foo defined as "const int foo". */ | |
3408 | if (sym_sec == NULL || (sym_sec->flags & SEC_CODE) != 0) | |
3409 | { | |
3410 | if ((insn & ((0x3f << 26) | (0x1f << 21))) | |
3411 | == (((int) OP_ADDIL << 26) | (27 << 21))) | |
3412 | { | |
3413 | insn &= ~ (0x1f << 21); | |
3414 | #if 0 /* debug them. */ | |
3415 | (*_bfd_error_handler) | |
3416 | (_("%s(%s+0x%lx): fixing %s"), | |
3417 | bfd_archive_filename (input_bfd), | |
3418 | input_section->name, | |
3419 | (long) rel->r_offset, | |
3420 | howto->name); | |
3421 | #endif | |
3422 | } | |
3423 | /* Now try to make things easy for the dynamic linker. */ | |
3424 | ||
3425 | break; | |
3426 | } | |
3427 | /* Fall thru. */ | |
3428 | ||
3429 | case R_PARISC_DLTIND21L: | |
3430 | case R_PARISC_DLTIND14R: | |
3431 | case R_PARISC_DLTIND14F: | |
3432 | value -= elf_gp (input_section->output_section->owner); | |
3433 | break; | |
3434 | ||
3435 | case R_PARISC_SEGREL32: | |
3436 | if ((sym_sec->flags & SEC_CODE) != 0) | |
3437 | value -= htab->text_segment_base; | |
3438 | else | |
3439 | value -= htab->data_segment_base; | |
3440 | break; | |
3441 | ||
3442 | default: | |
3443 | break; | |
3444 | } | |
3445 | ||
3446 | switch (r_type) | |
3447 | { | |
3448 | case R_PARISC_DIR32: | |
3449 | case R_PARISC_DIR14F: | |
3450 | case R_PARISC_DIR17F: | |
3451 | case R_PARISC_PCREL17C: | |
3452 | case R_PARISC_PCREL14F: | |
3453 | case R_PARISC_DPREL14F: | |
3454 | case R_PARISC_PLABEL32: | |
3455 | case R_PARISC_DLTIND14F: | |
3456 | case R_PARISC_SEGBASE: | |
3457 | case R_PARISC_SEGREL32: | |
3458 | r_field = e_fsel; | |
3459 | break; | |
3460 | ||
3461 | case R_PARISC_DLTIND21L: | |
3462 | case R_PARISC_PCREL21L: | |
3463 | case R_PARISC_PLABEL21L: | |
3464 | r_field = e_lsel; | |
3465 | break; | |
3466 | ||
3467 | case R_PARISC_DIR21L: | |
3468 | case R_PARISC_DPREL21L: | |
3469 | r_field = e_lrsel; | |
3470 | break; | |
3471 | ||
3472 | case R_PARISC_PCREL17R: | |
3473 | case R_PARISC_PCREL14R: | |
3474 | case R_PARISC_PLABEL14R: | |
3475 | case R_PARISC_DLTIND14R: | |
3476 | r_field = e_rsel; | |
3477 | break; | |
3478 | ||
3479 | case R_PARISC_DIR17R: | |
3480 | case R_PARISC_DIR14R: | |
3481 | case R_PARISC_DPREL14R: | |
3482 | r_field = e_rrsel; | |
3483 | break; | |
3484 | ||
3485 | case R_PARISC_PCREL12F: | |
3486 | case R_PARISC_PCREL17F: | |
3487 | case R_PARISC_PCREL22F: | |
3488 | r_field = e_fsel; | |
3489 | ||
3490 | if (r_type == (unsigned int) R_PARISC_PCREL17F) | |
3491 | { | |
3492 | max_branch_offset = (1 << (17-1)) << 2; | |
3493 | } | |
3494 | else if (r_type == (unsigned int) R_PARISC_PCREL12F) | |
3495 | { | |
3496 | max_branch_offset = (1 << (12-1)) << 2; | |
3497 | } | |
3498 | else | |
3499 | { | |
3500 | max_branch_offset = (1 << (22-1)) << 2; | |
3501 | } | |
3502 | ||
3503 | /* sym_sec is NULL on undefined weak syms or when shared on | |
3504 | undefined syms. We've already checked for a stub for the | |
3505 | shared undefined case. */ | |
3506 | if (sym_sec == NULL) | |
3507 | break; | |
3508 | ||
3509 | /* If the branch is out of reach, then redirect the | |
3510 | call to the local stub for this function. */ | |
3511 | if (value + addend + max_branch_offset >= 2*max_branch_offset) | |
3512 | { | |
3513 | stub_entry = hppa_get_stub_entry (input_section, sym_sec, | |
3514 | h, rel, htab); | |
3515 | if (stub_entry == NULL) | |
3516 | return bfd_reloc_undefined; | |
3517 | ||
3518 | /* Munge up the value and addend so that we call the stub | |
3519 | rather than the procedure directly. */ | |
3520 | value = (stub_entry->stub_offset | |
3521 | + stub_entry->stub_sec->output_offset | |
3522 | + stub_entry->stub_sec->output_section->vma | |
3523 | - location); | |
3524 | addend = -8; | |
3525 | } | |
3526 | break; | |
3527 | ||
3528 | /* Something we don't know how to handle. */ | |
3529 | default: | |
3530 | return bfd_reloc_notsupported; | |
3531 | } | |
3532 | ||
3533 | /* Make sure we can reach the stub. */ | |
3534 | if (max_branch_offset != 0 | |
3535 | && value + addend + max_branch_offset >= 2*max_branch_offset) | |
3536 | { | |
3537 | (*_bfd_error_handler) | |
3538 | (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"), | |
3539 | bfd_archive_filename (input_bfd), | |
3540 | input_section->name, | |
3541 | (long) rel->r_offset, | |
3542 | stub_entry->root.string); | |
3543 | bfd_set_error (bfd_error_bad_value); | |
3544 | return bfd_reloc_notsupported; | |
3545 | } | |
3546 | ||
3547 | val = hppa_field_adjust (value, addend, r_field); | |
3548 | ||
3549 | switch (r_type) | |
3550 | { | |
3551 | case R_PARISC_PCREL12F: | |
3552 | case R_PARISC_PCREL17C: | |
3553 | case R_PARISC_PCREL17F: | |
3554 | case R_PARISC_PCREL17R: | |
3555 | case R_PARISC_PCREL22F: | |
3556 | case R_PARISC_DIR17F: | |
3557 | case R_PARISC_DIR17R: | |
3558 | /* This is a branch. Divide the offset by four. | |
3559 | Note that we need to decide whether it's a branch or | |
3560 | otherwise by inspecting the reloc. Inspecting insn won't | |
3561 | work as insn might be from a .word directive. */ | |
3562 | val >>= 2; | |
3563 | break; | |
3564 | ||
3565 | default: | |
3566 | break; | |
3567 | } | |
3568 | ||
3569 | insn = hppa_rebuild_insn (insn, val, r_format); | |
3570 | ||
3571 | /* Update the instruction word. */ | |
3572 | bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data); | |
3573 | return bfd_reloc_ok; | |
3574 | } | |
3575 | ||
3576 | /* Relocate an HPPA ELF section. */ | |
3577 | ||
3578 | static bfd_boolean | |
3579 | elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section, | |
3580 | contents, relocs, local_syms, local_sections) | |
3581 | bfd *output_bfd; | |
3582 | struct bfd_link_info *info; | |
3583 | bfd *input_bfd; | |
3584 | asection *input_section; | |
3585 | bfd_byte *contents; | |
3586 | Elf_Internal_Rela *relocs; | |
3587 | Elf_Internal_Sym *local_syms; | |
3588 | asection **local_sections; | |
3589 | { | |
3590 | bfd_vma *local_got_offsets; | |
3591 | struct elf32_hppa_link_hash_table *htab; | |
3592 | Elf_Internal_Shdr *symtab_hdr; | |
3593 | Elf_Internal_Rela *rel; | |
3594 | Elf_Internal_Rela *relend; | |
3595 | ||
3596 | if (info->relocatable) | |
3597 | return TRUE; | |
3598 | ||
3599 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3600 | ||
3601 | htab = hppa_link_hash_table (info); | |
3602 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
3603 | ||
3604 | rel = relocs; | |
3605 | relend = relocs + input_section->reloc_count; | |
3606 | for (; rel < relend; rel++) | |
3607 | { | |
3608 | unsigned int r_type; | |
3609 | reloc_howto_type *howto; | |
3610 | unsigned int r_symndx; | |
3611 | struct elf32_hppa_link_hash_entry *h; | |
3612 | Elf_Internal_Sym *sym; | |
3613 | asection *sym_sec; | |
3614 | bfd_vma relocation; | |
3615 | bfd_reloc_status_type r; | |
3616 | const char *sym_name; | |
3617 | bfd_boolean plabel; | |
3618 | bfd_boolean warned_undef; | |
3619 | ||
3620 | r_type = ELF32_R_TYPE (rel->r_info); | |
3621 | if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) | |
3622 | { | |
3623 | bfd_set_error (bfd_error_bad_value); | |
3624 | return FALSE; | |
3625 | } | |
3626 | if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY | |
3627 | || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT) | |
3628 | continue; | |
3629 | ||
3630 | /* This is a final link. */ | |
3631 | r_symndx = ELF32_R_SYM (rel->r_info); | |
3632 | h = NULL; | |
3633 | sym = NULL; | |
3634 | sym_sec = NULL; | |
3635 | warned_undef = FALSE; | |
3636 | if (r_symndx < symtab_hdr->sh_info) | |
3637 | { | |
3638 | /* This is a local symbol, h defaults to NULL. */ | |
3639 | sym = local_syms + r_symndx; | |
3640 | sym_sec = local_sections[r_symndx]; | |
3641 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sym_sec, rel); | |
3642 | } | |
3643 | else | |
3644 | { | |
3645 | int indx; | |
3646 | ||
3647 | /* It's a global; Find its entry in the link hash. */ | |
3648 | indx = r_symndx - symtab_hdr->sh_info; | |
3649 | h = ((struct elf32_hppa_link_hash_entry *) | |
3650 | elf_sym_hashes (input_bfd)[indx]); | |
3651 | while (h->elf.root.type == bfd_link_hash_indirect | |
3652 | || h->elf.root.type == bfd_link_hash_warning) | |
3653 | h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link; | |
3654 | ||
3655 | relocation = 0; | |
3656 | if (h->elf.root.type == bfd_link_hash_defined | |
3657 | || h->elf.root.type == bfd_link_hash_defweak) | |
3658 | { | |
3659 | sym_sec = h->elf.root.u.def.section; | |
3660 | /* If sym_sec->output_section is NULL, then it's a | |
3661 | symbol defined in a shared library. */ | |
3662 | if (sym_sec->output_section != NULL) | |
3663 | relocation = (h->elf.root.u.def.value | |
3664 | + sym_sec->output_offset | |
3665 | + sym_sec->output_section->vma); | |
3666 | } | |
3667 | else if (h->elf.root.type == bfd_link_hash_undefweak) | |
3668 | ; | |
3669 | else if (info->shared | |
3670 | && !info->no_undefined | |
3671 | && ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT | |
3672 | && h->elf.type != STT_PARISC_MILLI) | |
3673 | ; | |
3674 | else | |
3675 | { | |
3676 | if (!((*info->callbacks->undefined_symbol) | |
3677 | (info, h->elf.root.root.string, input_bfd, | |
3678 | input_section, rel->r_offset, TRUE))) | |
3679 | return FALSE; | |
3680 | warned_undef = TRUE; | |
3681 | } | |
3682 | } | |
3683 | ||
3684 | /* Do any required modifications to the relocation value, and | |
3685 | determine what types of dynamic info we need to output, if | |
3686 | any. */ | |
3687 | plabel = 0; | |
3688 | switch (r_type) | |
3689 | { | |
3690 | case R_PARISC_DLTIND14F: | |
3691 | case R_PARISC_DLTIND14R: | |
3692 | case R_PARISC_DLTIND21L: | |
3693 | { | |
3694 | bfd_vma off; | |
3695 | bfd_boolean do_got = 0; | |
3696 | ||
3697 | /* Relocation is to the entry for this symbol in the | |
3698 | global offset table. */ | |
3699 | if (h != NULL) | |
3700 | { | |
3701 | bfd_boolean dyn; | |
3702 | ||
3703 | off = h->elf.got.offset; | |
3704 | dyn = htab->elf.dynamic_sections_created; | |
3705 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, &h->elf)) | |
3706 | { | |
3707 | /* If we aren't going to call finish_dynamic_symbol, | |
3708 | then we need to handle initialisation of the .got | |
3709 | entry and create needed relocs here. Since the | |
3710 | offset must always be a multiple of 4, we use the | |
3711 | least significant bit to record whether we have | |
3712 | initialised it already. */ | |
3713 | if ((off & 1) != 0) | |
3714 | off &= ~1; | |
3715 | else | |
3716 | { | |
3717 | h->elf.got.offset |= 1; | |
3718 | do_got = 1; | |
3719 | } | |
3720 | } | |
3721 | } | |
3722 | else | |
3723 | { | |
3724 | /* Local symbol case. */ | |
3725 | if (local_got_offsets == NULL) | |
3726 | abort (); | |
3727 | ||
3728 | off = local_got_offsets[r_symndx]; | |
3729 | ||
3730 | /* The offset must always be a multiple of 4. We use | |
3731 | the least significant bit to record whether we have | |
3732 | already generated the necessary reloc. */ | |
3733 | if ((off & 1) != 0) | |
3734 | off &= ~1; | |
3735 | else | |
3736 | { | |
3737 | local_got_offsets[r_symndx] |= 1; | |
3738 | do_got = 1; | |
3739 | } | |
3740 | } | |
3741 | ||
3742 | if (do_got) | |
3743 | { | |
3744 | if (info->shared) | |
3745 | { | |
3746 | /* Output a dynamic relocation for this GOT entry. | |
3747 | In this case it is relative to the base of the | |
3748 | object because the symbol index is zero. */ | |
3749 | Elf_Internal_Rela outrel; | |
3750 | bfd_byte *loc; | |
3751 | asection *s = htab->srelgot; | |
3752 | ||
3753 | outrel.r_offset = (off | |
3754 | + htab->sgot->output_offset | |
3755 | + htab->sgot->output_section->vma); | |
3756 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); | |
3757 | outrel.r_addend = relocation; | |
3758 | loc = s->contents; | |
3759 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
3760 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
3761 | } | |
3762 | else | |
3763 | bfd_put_32 (output_bfd, relocation, | |
3764 | htab->sgot->contents + off); | |
3765 | } | |
3766 | ||
3767 | if (off >= (bfd_vma) -2) | |
3768 | abort (); | |
3769 | ||
3770 | /* Add the base of the GOT to the relocation value. */ | |
3771 | relocation = (off | |
3772 | + htab->sgot->output_offset | |
3773 | + htab->sgot->output_section->vma); | |
3774 | } | |
3775 | break; | |
3776 | ||
3777 | case R_PARISC_SEGREL32: | |
3778 | /* If this is the first SEGREL relocation, then initialize | |
3779 | the segment base values. */ | |
3780 | if (htab->text_segment_base == (bfd_vma) -1) | |
3781 | bfd_map_over_sections (output_bfd, hppa_record_segment_addr, htab); | |
3782 | break; | |
3783 | ||
3784 | case R_PARISC_PLABEL14R: | |
3785 | case R_PARISC_PLABEL21L: | |
3786 | case R_PARISC_PLABEL32: | |
3787 | if (htab->elf.dynamic_sections_created) | |
3788 | { | |
3789 | bfd_vma off; | |
3790 | bfd_boolean do_plt = 0; | |
3791 | ||
3792 | /* If we have a global symbol with a PLT slot, then | |
3793 | redirect this relocation to it. */ | |
3794 | if (h != NULL) | |
3795 | { | |
3796 | off = h->elf.plt.offset; | |
3797 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, &h->elf)) | |
3798 | { | |
3799 | /* In a non-shared link, adjust_dynamic_symbols | |
3800 | isn't called for symbols forced local. We | |
3801 | need to write out the plt entry here. */ | |
3802 | if ((off & 1) != 0) | |
3803 | off &= ~1; | |
3804 | else | |
3805 | { | |
3806 | h->elf.plt.offset |= 1; | |
3807 | do_plt = 1; | |
3808 | } | |
3809 | } | |
3810 | } | |
3811 | else | |
3812 | { | |
3813 | bfd_vma *local_plt_offsets; | |
3814 | ||
3815 | if (local_got_offsets == NULL) | |
3816 | abort (); | |
3817 | ||
3818 | local_plt_offsets = local_got_offsets + symtab_hdr->sh_info; | |
3819 | off = local_plt_offsets[r_symndx]; | |
3820 | ||
3821 | /* As for the local .got entry case, we use the last | |
3822 | bit to record whether we've already initialised | |
3823 | this local .plt entry. */ | |
3824 | if ((off & 1) != 0) | |
3825 | off &= ~1; | |
3826 | else | |
3827 | { | |
3828 | local_plt_offsets[r_symndx] |= 1; | |
3829 | do_plt = 1; | |
3830 | } | |
3831 | } | |
3832 | ||
3833 | if (do_plt) | |
3834 | { | |
3835 | if (info->shared) | |
3836 | { | |
3837 | /* Output a dynamic IPLT relocation for this | |
3838 | PLT entry. */ | |
3839 | Elf_Internal_Rela outrel; | |
3840 | bfd_byte *loc; | |
3841 | asection *s = htab->srelplt; | |
3842 | ||
3843 | outrel.r_offset = (off | |
3844 | + htab->splt->output_offset | |
3845 | + htab->splt->output_section->vma); | |
3846 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); | |
3847 | outrel.r_addend = relocation; | |
3848 | loc = s->contents; | |
3849 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
3850 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
3851 | } | |
3852 | else | |
3853 | { | |
3854 | bfd_put_32 (output_bfd, | |
3855 | relocation, | |
3856 | htab->splt->contents + off); | |
3857 | bfd_put_32 (output_bfd, | |
3858 | elf_gp (htab->splt->output_section->owner), | |
3859 | htab->splt->contents + off + 4); | |
3860 | } | |
3861 | } | |
3862 | ||
3863 | if (off >= (bfd_vma) -2) | |
3864 | abort (); | |
3865 | ||
3866 | /* PLABELs contain function pointers. Relocation is to | |
3867 | the entry for the function in the .plt. The magic +2 | |
3868 | offset signals to $$dyncall that the function pointer | |
3869 | is in the .plt and thus has a gp pointer too. | |
3870 | Exception: Undefined PLABELs should have a value of | |
3871 | zero. */ | |
3872 | if (h == NULL | |
3873 | || (h->elf.root.type != bfd_link_hash_undefweak | |
3874 | && h->elf.root.type != bfd_link_hash_undefined)) | |
3875 | { | |
3876 | relocation = (off | |
3877 | + htab->splt->output_offset | |
3878 | + htab->splt->output_section->vma | |
3879 | + 2); | |
3880 | } | |
3881 | plabel = 1; | |
3882 | } | |
3883 | /* Fall through and possibly emit a dynamic relocation. */ | |
3884 | ||
3885 | case R_PARISC_DIR17F: | |
3886 | case R_PARISC_DIR17R: | |
3887 | case R_PARISC_DIR14F: | |
3888 | case R_PARISC_DIR14R: | |
3889 | case R_PARISC_DIR21L: | |
3890 | case R_PARISC_DPREL14F: | |
3891 | case R_PARISC_DPREL14R: | |
3892 | case R_PARISC_DPREL21L: | |
3893 | case R_PARISC_DIR32: | |
3894 | /* r_symndx will be zero only for relocs against symbols | |
3895 | from removed linkonce sections, or sections discarded by | |
3896 | a linker script. */ | |
3897 | if (r_symndx == 0 | |
3898 | || (input_section->flags & SEC_ALLOC) == 0) | |
3899 | break; | |
3900 | ||
3901 | /* The reloc types handled here and this conditional | |
3902 | expression must match the code in ..check_relocs and | |
3903 | allocate_dynrelocs. ie. We need exactly the same condition | |
3904 | as in ..check_relocs, with some extra conditions (dynindx | |
3905 | test in this case) to cater for relocs removed by | |
3906 | allocate_dynrelocs. If you squint, the non-shared test | |
3907 | here does indeed match the one in ..check_relocs, the | |
3908 | difference being that here we test DEF_DYNAMIC as well as | |
3909 | !DEF_REGULAR. All common syms end up with !DEF_REGULAR, | |
3910 | which is why we can't use just that test here. | |
3911 | Conversely, DEF_DYNAMIC can't be used in check_relocs as | |
3912 | there all files have not been loaded. */ | |
3913 | if ((info->shared | |
3914 | && (IS_ABSOLUTE_RELOC (r_type) | |
3915 | || (h != NULL | |
3916 | && h->elf.dynindx != -1 | |
3917 | && (!info->symbolic | |
3918 | || (h->elf.elf_link_hash_flags | |
3919 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
3920 | || (!info->shared | |
3921 | && h != NULL | |
3922 | && h->elf.dynindx != -1 | |
3923 | && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
3924 | && (((h->elf.elf_link_hash_flags | |
3925 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3926 | && (h->elf.elf_link_hash_flags | |
3927 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3928 | || h->elf.root.type == bfd_link_hash_undefweak | |
3929 | || h->elf.root.type == bfd_link_hash_undefined))) | |
3930 | { | |
3931 | Elf_Internal_Rela outrel; | |
3932 | bfd_boolean skip; | |
3933 | asection *sreloc; | |
3934 | bfd_byte *loc; | |
3935 | ||
3936 | /* When generating a shared object, these relocations | |
3937 | are copied into the output file to be resolved at run | |
3938 | time. */ | |
3939 | ||
3940 | outrel.r_addend = rel->r_addend; | |
3941 | outrel.r_offset = | |
3942 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3943 | rel->r_offset); | |
3944 | skip = (outrel.r_offset == (bfd_vma) -1 | |
3945 | || outrel.r_offset == (bfd_vma) -2); | |
3946 | outrel.r_offset += (input_section->output_offset | |
3947 | + input_section->output_section->vma); | |
3948 | ||
3949 | if (skip) | |
3950 | { | |
3951 | memset (&outrel, 0, sizeof (outrel)); | |
3952 | } | |
3953 | else if (h != NULL | |
3954 | && h->elf.dynindx != -1 | |
3955 | && (plabel | |
3956 | || !IS_ABSOLUTE_RELOC (r_type) | |
3957 | || !info->shared | |
3958 | || !info->symbolic | |
3959 | || (h->elf.elf_link_hash_flags | |
3960 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
3961 | { | |
3962 | outrel.r_info = ELF32_R_INFO (h->elf.dynindx, r_type); | |
3963 | } | |
3964 | else /* It's a local symbol, or one marked to become local. */ | |
3965 | { | |
3966 | int indx = 0; | |
3967 | ||
3968 | /* Add the absolute offset of the symbol. */ | |
3969 | outrel.r_addend += relocation; | |
3970 | ||
3971 | /* Global plabels need to be processed by the | |
3972 | dynamic linker so that functions have at most one | |
3973 | fptr. For this reason, we need to differentiate | |
3974 | between global and local plabels, which we do by | |
3975 | providing the function symbol for a global plabel | |
3976 | reloc, and no symbol for local plabels. */ | |
3977 | if (! plabel | |
3978 | && sym_sec != NULL | |
3979 | && sym_sec->output_section != NULL | |
3980 | && ! bfd_is_abs_section (sym_sec)) | |
3981 | { | |
3982 | indx = elf_section_data (sym_sec->output_section)->dynindx; | |
3983 | /* We are turning this relocation into one | |
3984 | against a section symbol, so subtract out the | |
3985 | output section's address but not the offset | |
3986 | of the input section in the output section. */ | |
3987 | outrel.r_addend -= sym_sec->output_section->vma; | |
3988 | } | |
3989 | ||
3990 | outrel.r_info = ELF32_R_INFO (indx, r_type); | |
3991 | } | |
3992 | #if 0 | |
3993 | /* EH info can cause unaligned DIR32 relocs. | |
3994 | Tweak the reloc type for the dynamic linker. */ | |
3995 | if (r_type == R_PARISC_DIR32 && (outrel.r_offset & 3) != 0) | |
3996 | outrel.r_info = ELF32_R_INFO (ELF32_R_SYM (outrel.r_info), | |
3997 | R_PARISC_DIR32U); | |
3998 | #endif | |
3999 | sreloc = elf_section_data (input_section)->sreloc; | |
4000 | if (sreloc == NULL) | |
4001 | abort (); | |
4002 | ||
4003 | loc = sreloc->contents; | |
4004 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
4005 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
4006 | } | |
4007 | break; | |
4008 | ||
4009 | default: | |
4010 | break; | |
4011 | } | |
4012 | ||
4013 | r = final_link_relocate (input_section, contents, rel, relocation, | |
4014 | htab, sym_sec, h); | |
4015 | ||
4016 | if (r == bfd_reloc_ok) | |
4017 | continue; | |
4018 | ||
4019 | if (h != NULL) | |
4020 | sym_name = h->elf.root.root.string; | |
4021 | else | |
4022 | { | |
4023 | sym_name = bfd_elf_string_from_elf_section (input_bfd, | |
4024 | symtab_hdr->sh_link, | |
4025 | sym->st_name); | |
4026 | if (sym_name == NULL) | |
4027 | return FALSE; | |
4028 | if (*sym_name == '\0') | |
4029 | sym_name = bfd_section_name (input_bfd, sym_sec); | |
4030 | } | |
4031 | ||
4032 | howto = elf_hppa_howto_table + r_type; | |
4033 | ||
4034 | if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported) | |
4035 | { | |
4036 | if (r == bfd_reloc_notsupported || !warned_undef) | |
4037 | { | |
4038 | (*_bfd_error_handler) | |
4039 | (_("%s(%s+0x%lx): cannot handle %s for %s"), | |
4040 | bfd_archive_filename (input_bfd), | |
4041 | input_section->name, | |
4042 | (long) rel->r_offset, | |
4043 | howto->name, | |
4044 | sym_name); | |
4045 | bfd_set_error (bfd_error_bad_value); | |
4046 | return FALSE; | |
4047 | } | |
4048 | } | |
4049 | else | |
4050 | { | |
4051 | if (!((*info->callbacks->reloc_overflow) | |
4052 | (info, sym_name, howto->name, (bfd_vma) 0, | |
4053 | input_bfd, input_section, rel->r_offset))) | |
4054 | return FALSE; | |
4055 | } | |
4056 | } | |
4057 | ||
4058 | return TRUE; | |
4059 | } | |
4060 | ||
4061 | /* Finish up dynamic symbol handling. We set the contents of various | |
4062 | dynamic sections here. */ | |
4063 | ||
4064 | static bfd_boolean | |
4065 | elf32_hppa_finish_dynamic_symbol (output_bfd, info, h, sym) | |
4066 | bfd *output_bfd; | |
4067 | struct bfd_link_info *info; | |
4068 | struct elf_link_hash_entry *h; | |
4069 | Elf_Internal_Sym *sym; | |
4070 | { | |
4071 | struct elf32_hppa_link_hash_table *htab; | |
4072 | ||
4073 | htab = hppa_link_hash_table (info); | |
4074 | ||
4075 | if (h->plt.offset != (bfd_vma) -1) | |
4076 | { | |
4077 | bfd_vma value; | |
4078 | ||
4079 | if (h->plt.offset & 1) | |
4080 | abort (); | |
4081 | ||
4082 | /* This symbol has an entry in the procedure linkage table. Set | |
4083 | it up. | |
4084 | ||
4085 | The format of a plt entry is | |
4086 | <funcaddr> | |
4087 | <__gp> | |
4088 | */ | |
4089 | value = 0; | |
4090 | if (h->root.type == bfd_link_hash_defined | |
4091 | || h->root.type == bfd_link_hash_defweak) | |
4092 | { | |
4093 | value = h->root.u.def.value; | |
4094 | if (h->root.u.def.section->output_section != NULL) | |
4095 | value += (h->root.u.def.section->output_offset | |
4096 | + h->root.u.def.section->output_section->vma); | |
4097 | } | |
4098 | ||
4099 | if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call) | |
4100 | { | |
4101 | Elf_Internal_Rela rel; | |
4102 | bfd_byte *loc; | |
4103 | ||
4104 | /* Create a dynamic IPLT relocation for this entry. */ | |
4105 | rel.r_offset = (h->plt.offset | |
4106 | + htab->splt->output_offset | |
4107 | + htab->splt->output_section->vma); | |
4108 | if (h->dynindx != -1) | |
4109 | { | |
4110 | rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT); | |
4111 | rel.r_addend = 0; | |
4112 | } | |
4113 | else | |
4114 | { | |
4115 | /* This symbol has been marked to become local, and is | |
4116 | used by a plabel so must be kept in the .plt. */ | |
4117 | rel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); | |
4118 | rel.r_addend = value; | |
4119 | } | |
4120 | ||
4121 | loc = htab->srelplt->contents; | |
4122 | loc += htab->srelplt->reloc_count++ * sizeof (Elf32_External_Rela); | |
4123 | bfd_elf32_swap_reloca_out (htab->splt->output_section->owner, | |
4124 | &rel, loc); | |
4125 | } | |
4126 | else | |
4127 | { | |
4128 | bfd_put_32 (htab->splt->owner, | |
4129 | value, | |
4130 | htab->splt->contents + h->plt.offset); | |
4131 | bfd_put_32 (htab->splt->owner, | |
4132 | elf_gp (htab->splt->output_section->owner), | |
4133 | htab->splt->contents + h->plt.offset + 4); | |
4134 | } | |
4135 | ||
4136 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
4137 | { | |
4138 | /* Mark the symbol as undefined, rather than as defined in | |
4139 | the .plt section. Leave the value alone. */ | |
4140 | sym->st_shndx = SHN_UNDEF; | |
4141 | } | |
4142 | } | |
4143 | ||
4144 | if (h->got.offset != (bfd_vma) -1) | |
4145 | { | |
4146 | Elf_Internal_Rela rel; | |
4147 | bfd_byte *loc; | |
4148 | ||
4149 | /* This symbol has an entry in the global offset table. Set it | |
4150 | up. */ | |
4151 | ||
4152 | rel.r_offset = ((h->got.offset &~ (bfd_vma) 1) | |
4153 | + htab->sgot->output_offset | |
4154 | + htab->sgot->output_section->vma); | |
4155 | ||
4156 | /* If this is a -Bsymbolic link and the symbol is defined | |
4157 | locally or was forced to be local because of a version file, | |
4158 | we just want to emit a RELATIVE reloc. The entry in the | |
4159 | global offset table will already have been initialized in the | |
4160 | relocate_section function. */ | |
4161 | if (info->shared | |
4162 | && (info->symbolic || h->dynindx == -1) | |
4163 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
4164 | { | |
4165 | rel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); | |
4166 | rel.r_addend = (h->root.u.def.value | |
4167 | + h->root.u.def.section->output_offset | |
4168 | + h->root.u.def.section->output_section->vma); | |
4169 | } | |
4170 | else | |
4171 | { | |
4172 | if ((h->got.offset & 1) != 0) | |
4173 | abort (); | |
4174 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
4175 | htab->sgot->contents + h->got.offset); | |
4176 | rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32); | |
4177 | rel.r_addend = 0; | |
4178 | } | |
4179 | ||
4180 | loc = htab->srelgot->contents; | |
4181 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
4182 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
4183 | } | |
4184 | ||
4185 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
4186 | { | |
4187 | asection *s; | |
4188 | Elf_Internal_Rela rel; | |
4189 | bfd_byte *loc; | |
4190 | ||
4191 | /* This symbol needs a copy reloc. Set it up. */ | |
4192 | ||
4193 | if (! (h->dynindx != -1 | |
4194 | && (h->root.type == bfd_link_hash_defined | |
4195 | || h->root.type == bfd_link_hash_defweak))) | |
4196 | abort (); | |
4197 | ||
4198 | s = htab->srelbss; | |
4199 | ||
4200 | rel.r_offset = (h->root.u.def.value | |
4201 | + h->root.u.def.section->output_offset | |
4202 | + h->root.u.def.section->output_section->vma); | |
4203 | rel.r_addend = 0; | |
4204 | rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_COPY); | |
4205 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); | |
4206 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
4207 | } | |
4208 | ||
4209 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
4210 | if (h->root.root.string[0] == '_' | |
4211 | && (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
4212 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)) | |
4213 | { | |
4214 | sym->st_shndx = SHN_ABS; | |
4215 | } | |
4216 | ||
4217 | return TRUE; | |
4218 | } | |
4219 | ||
4220 | /* Used to decide how to sort relocs in an optimal manner for the | |
4221 | dynamic linker, before writing them out. */ | |
4222 | ||
4223 | static enum elf_reloc_type_class | |
4224 | elf32_hppa_reloc_type_class (rela) | |
4225 | const Elf_Internal_Rela *rela; | |
4226 | { | |
4227 | if (ELF32_R_SYM (rela->r_info) == 0) | |
4228 | return reloc_class_relative; | |
4229 | ||
4230 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
4231 | { | |
4232 | case R_PARISC_IPLT: | |
4233 | return reloc_class_plt; | |
4234 | case R_PARISC_COPY: | |
4235 | return reloc_class_copy; | |
4236 | default: | |
4237 | return reloc_class_normal; | |
4238 | } | |
4239 | } | |
4240 | ||
4241 | /* Finish up the dynamic sections. */ | |
4242 | ||
4243 | static bfd_boolean | |
4244 | elf32_hppa_finish_dynamic_sections (output_bfd, info) | |
4245 | bfd *output_bfd; | |
4246 | struct bfd_link_info *info; | |
4247 | { | |
4248 | bfd *dynobj; | |
4249 | struct elf32_hppa_link_hash_table *htab; | |
4250 | asection *sdyn; | |
4251 | ||
4252 | htab = hppa_link_hash_table (info); | |
4253 | dynobj = htab->elf.dynobj; | |
4254 | ||
4255 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4256 | ||
4257 | if (htab->elf.dynamic_sections_created) | |
4258 | { | |
4259 | Elf32_External_Dyn *dyncon, *dynconend; | |
4260 | ||
4261 | if (sdyn == NULL) | |
4262 | abort (); | |
4263 | ||
4264 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
4265 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
4266 | for (; dyncon < dynconend; dyncon++) | |
4267 | { | |
4268 | Elf_Internal_Dyn dyn; | |
4269 | asection *s; | |
4270 | ||
4271 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4272 | ||
4273 | switch (dyn.d_tag) | |
4274 | { | |
4275 | default: | |
4276 | continue; | |
4277 | ||
4278 | case DT_PLTGOT: | |
4279 | /* Use PLTGOT to set the GOT register. */ | |
4280 | dyn.d_un.d_ptr = elf_gp (output_bfd); | |
4281 | break; | |
4282 | ||
4283 | case DT_JMPREL: | |
4284 | s = htab->srelplt; | |
4285 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
4286 | break; | |
4287 | ||
4288 | case DT_PLTRELSZ: | |
4289 | s = htab->srelplt; | |
4290 | dyn.d_un.d_val = s->_raw_size; | |
4291 | break; | |
4292 | ||
4293 | case DT_RELASZ: | |
4294 | /* Don't count procedure linkage table relocs in the | |
4295 | overall reloc count. */ | |
4296 | s = htab->srelplt; | |
4297 | if (s == NULL) | |
4298 | continue; | |
4299 | dyn.d_un.d_val -= s->_raw_size; | |
4300 | break; | |
4301 | ||
4302 | case DT_RELA: | |
4303 | /* We may not be using the standard ELF linker script. | |
4304 | If .rela.plt is the first .rela section, we adjust | |
4305 | DT_RELA to not include it. */ | |
4306 | s = htab->srelplt; | |
4307 | if (s == NULL) | |
4308 | continue; | |
4309 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
4310 | continue; | |
4311 | dyn.d_un.d_ptr += s->_raw_size; | |
4312 | break; | |
4313 | } | |
4314 | ||
4315 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
4316 | } | |
4317 | } | |
4318 | ||
4319 | if (htab->sgot != NULL && htab->sgot->_raw_size != 0) | |
4320 | { | |
4321 | /* Fill in the first entry in the global offset table. | |
4322 | We use it to point to our dynamic section, if we have one. */ | |
4323 | bfd_put_32 (output_bfd, | |
4324 | (sdyn != NULL | |
4325 | ? sdyn->output_section->vma + sdyn->output_offset | |
4326 | : (bfd_vma) 0), | |
4327 | htab->sgot->contents); | |
4328 | ||
4329 | /* The second entry is reserved for use by the dynamic linker. */ | |
4330 | memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE); | |
4331 | ||
4332 | /* Set .got entry size. */ | |
4333 | elf_section_data (htab->sgot->output_section) | |
4334 | ->this_hdr.sh_entsize = GOT_ENTRY_SIZE; | |
4335 | } | |
4336 | ||
4337 | if (htab->splt != NULL && htab->splt->_raw_size != 0) | |
4338 | { | |
4339 | /* Set plt entry size. */ | |
4340 | elf_section_data (htab->splt->output_section) | |
4341 | ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; | |
4342 | ||
4343 | if (htab->need_plt_stub) | |
4344 | { | |
4345 | /* Set up the .plt stub. */ | |
4346 | memcpy (htab->splt->contents | |
4347 | + htab->splt->_raw_size - sizeof (plt_stub), | |
4348 | plt_stub, sizeof (plt_stub)); | |
4349 | ||
4350 | if ((htab->splt->output_offset | |
4351 | + htab->splt->output_section->vma | |
4352 | + htab->splt->_raw_size) | |
4353 | != (htab->sgot->output_offset | |
4354 | + htab->sgot->output_section->vma)) | |
4355 | { | |
4356 | (*_bfd_error_handler) | |
4357 | (_(".got section not immediately after .plt section")); | |
4358 | return FALSE; | |
4359 | } | |
4360 | } | |
4361 | } | |
4362 | ||
4363 | return TRUE; | |
4364 | } | |
4365 | ||
4366 | /* Tweak the OSABI field of the elf header. */ | |
4367 | ||
4368 | static void | |
4369 | elf32_hppa_post_process_headers (abfd, link_info) | |
4370 | bfd *abfd; | |
4371 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED; | |
4372 | { | |
4373 | Elf_Internal_Ehdr * i_ehdrp; | |
4374 | ||
4375 | i_ehdrp = elf_elfheader (abfd); | |
4376 | ||
4377 | if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0) | |
4378 | { | |
4379 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX; | |
4380 | } | |
4381 | else | |
4382 | { | |
4383 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX; | |
4384 | } | |
4385 | } | |
4386 | ||
4387 | /* Called when writing out an object file to decide the type of a | |
4388 | symbol. */ | |
4389 | static int | |
4390 | elf32_hppa_elf_get_symbol_type (elf_sym, type) | |
4391 | Elf_Internal_Sym *elf_sym; | |
4392 | int type; | |
4393 | { | |
4394 | if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI) | |
4395 | return STT_PARISC_MILLI; | |
4396 | else | |
4397 | return type; | |
4398 | } | |
4399 | ||
4400 | /* Misc BFD support code. */ | |
4401 | #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name | |
4402 | #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup | |
4403 | #define elf_info_to_howto elf_hppa_info_to_howto | |
4404 | #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel | |
4405 | ||
4406 | /* Stuff for the BFD linker. */ | |
4407 | #define bfd_elf32_bfd_final_link elf32_hppa_final_link | |
4408 | #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create | |
4409 | #define bfd_elf32_bfd_link_hash_table_free elf32_hppa_link_hash_table_free | |
4410 | #define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook | |
4411 | #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol | |
4412 | #define elf_backend_copy_indirect_symbol elf32_hppa_copy_indirect_symbol | |
4413 | #define elf_backend_check_relocs elf32_hppa_check_relocs | |
4414 | #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections | |
4415 | #define elf_backend_fake_sections elf_hppa_fake_sections | |
4416 | #define elf_backend_relocate_section elf32_hppa_relocate_section | |
4417 | #define elf_backend_hide_symbol elf32_hppa_hide_symbol | |
4418 | #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol | |
4419 | #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections | |
4420 | #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections | |
4421 | #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook | |
4422 | #define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook | |
4423 | #define elf_backend_object_p elf32_hppa_object_p | |
4424 | #define elf_backend_final_write_processing elf_hppa_final_write_processing | |
4425 | #define elf_backend_post_process_headers elf32_hppa_post_process_headers | |
4426 | #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type | |
4427 | #define elf_backend_reloc_type_class elf32_hppa_reloc_type_class | |
4428 | ||
4429 | #define elf_backend_can_gc_sections 1 | |
4430 | #define elf_backend_can_refcount 1 | |
4431 | #define elf_backend_plt_alignment 2 | |
4432 | #define elf_backend_want_got_plt 0 | |
4433 | #define elf_backend_plt_readonly 0 | |
4434 | #define elf_backend_want_plt_sym 0 | |
4435 | #define elf_backend_got_header_size 8 | |
4436 | #define elf_backend_rela_normal 1 | |
4437 | ||
4438 | #define TARGET_BIG_SYM bfd_elf32_hppa_vec | |
4439 | #define TARGET_BIG_NAME "elf32-hppa" | |
4440 | #define ELF_ARCH bfd_arch_hppa | |
4441 | #define ELF_MACHINE_CODE EM_PARISC | |
4442 | #define ELF_MAXPAGESIZE 0x1000 | |
4443 | ||
4444 | #include "elf32-target.h" | |
4445 | ||
4446 | #undef TARGET_BIG_SYM | |
4447 | #define TARGET_BIG_SYM bfd_elf32_hppa_linux_vec | |
4448 | #undef TARGET_BIG_NAME | |
4449 | #define TARGET_BIG_NAME "elf32-hppa-linux" | |
4450 | ||
4451 | #define INCLUDED_TARGET_FILE 1 | |
4452 | #include "elf32-target.h" |