Commit | Line | Data |
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252b5132 | 1 | /* Alpha specific support for 64-bit ELF |
73896efb | 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | Contributed by Richard Henderson <rth@tamu.edu>. |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* We need a published ABI spec for this. Until one comes out, don't | |
23 | assume this'll remain unchanged forever. */ | |
24 | ||
25 | #include "bfd.h" | |
26 | #include "sysdep.h" | |
27 | #include "libbfd.h" | |
28 | #include "elf-bfd.h" | |
29 | ||
30 | #include "elf/alpha.h" | |
31 | ||
32 | #define ALPHAECOFF | |
33 | ||
34 | #define NO_COFF_RELOCS | |
35 | #define NO_COFF_SYMBOLS | |
36 | #define NO_COFF_LINENOS | |
37 | ||
fe8bc63d | 38 | /* Get the ECOFF swapping routines. Needed for the debug information. */ |
252b5132 RH |
39 | #include "coff/internal.h" |
40 | #include "coff/sym.h" | |
41 | #include "coff/symconst.h" | |
42 | #include "coff/ecoff.h" | |
43 | #include "coff/alpha.h" | |
44 | #include "aout/ar.h" | |
45 | #include "libcoff.h" | |
46 | #include "libecoff.h" | |
47 | #define ECOFF_64 | |
48 | #include "ecoffswap.h" | |
49 | ||
8fb35fed RH |
50 | static int alpha_elf_dynamic_symbol_p |
51 | PARAMS((struct elf_link_hash_entry *, struct bfd_link_info *)); | |
252b5132 RH |
52 | static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc |
53 | PARAMS((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
54 | static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create | |
55 | PARAMS((bfd *)); | |
56 | ||
57 | static bfd_reloc_status_type elf64_alpha_reloc_nil | |
58 | PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
59 | static bfd_reloc_status_type elf64_alpha_reloc_bad | |
60 | PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
61 | static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp | |
62 | PARAMS((bfd *, bfd_vma, bfd_byte *, bfd_byte *)); | |
63 | static bfd_reloc_status_type elf64_alpha_reloc_gpdisp | |
64 | PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
65 | ||
66 | static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup | |
67 | PARAMS((bfd *, bfd_reloc_code_real_type)); | |
68 | static void elf64_alpha_info_to_howto | |
69 | PARAMS((bfd *, arelent *, Elf64_Internal_Rela *)); | |
70 | ||
8fb35fed RH |
71 | static boolean elf64_alpha_mkobject |
72 | PARAMS((bfd *)); | |
252b5132 RH |
73 | static boolean elf64_alpha_object_p |
74 | PARAMS((bfd *)); | |
75 | static boolean elf64_alpha_section_from_shdr | |
76 | PARAMS((bfd *, Elf64_Internal_Shdr *, char *)); | |
204692d7 RH |
77 | static boolean elf64_alpha_section_flags |
78 | PARAMS((flagword *, Elf64_Internal_Shdr *)); | |
252b5132 RH |
79 | static boolean elf64_alpha_fake_sections |
80 | PARAMS((bfd *, Elf64_Internal_Shdr *, asection *)); | |
81 | static boolean elf64_alpha_create_got_section | |
82 | PARAMS((bfd *, struct bfd_link_info *)); | |
83 | static boolean elf64_alpha_create_dynamic_sections | |
84 | PARAMS((bfd *, struct bfd_link_info *)); | |
85 | ||
86 | static boolean elf64_alpha_read_ecoff_info | |
87 | PARAMS((bfd *, asection *, struct ecoff_debug_info *)); | |
88 | static boolean elf64_alpha_is_local_label_name | |
89 | PARAMS((bfd *, const char *)); | |
90 | static boolean elf64_alpha_find_nearest_line | |
91 | PARAMS((bfd *, asection *, asymbol **, bfd_vma, const char **, | |
92 | const char **, unsigned int *)); | |
93 | ||
94 | #if defined(__STDC__) || defined(ALMOST_STDC) | |
95 | struct alpha_elf_link_hash_entry; | |
96 | #endif | |
97 | ||
98 | static boolean elf64_alpha_output_extsym | |
99 | PARAMS((struct alpha_elf_link_hash_entry *, PTR)); | |
100 | ||
101 | static boolean elf64_alpha_can_merge_gots | |
102 | PARAMS((bfd *, bfd *)); | |
103 | static void elf64_alpha_merge_gots | |
104 | PARAMS((bfd *, bfd *)); | |
105 | static boolean elf64_alpha_calc_got_offsets_for_symbol | |
106 | PARAMS ((struct alpha_elf_link_hash_entry *, PTR)); | |
107 | static void elf64_alpha_calc_got_offsets PARAMS ((struct bfd_link_info *)); | |
108 | static boolean elf64_alpha_size_got_sections | |
109 | PARAMS ((bfd *, struct bfd_link_info *)); | |
110 | static boolean elf64_alpha_always_size_sections | |
111 | PARAMS ((bfd *, struct bfd_link_info *)); | |
112 | static boolean elf64_alpha_calc_dynrel_sizes | |
113 | PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *)); | |
114 | static boolean elf64_alpha_add_symbol_hook | |
115 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
116 | const char **, flagword *, asection **, bfd_vma *)); | |
117 | static boolean elf64_alpha_check_relocs | |
118 | PARAMS((bfd *, struct bfd_link_info *, asection *sec, | |
119 | const Elf_Internal_Rela *)); | |
120 | static boolean elf64_alpha_adjust_dynamic_symbol | |
121 | PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
122 | static boolean elf64_alpha_size_dynamic_sections | |
123 | PARAMS((bfd *, struct bfd_link_info *)); | |
252b5132 RH |
124 | static boolean elf64_alpha_relocate_section |
125 | PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
126 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
127 | static boolean elf64_alpha_finish_dynamic_symbol | |
128 | PARAMS((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
129 | Elf_Internal_Sym *)); | |
130 | static boolean elf64_alpha_finish_dynamic_sections | |
131 | PARAMS((bfd *, struct bfd_link_info *)); | |
132 | static boolean elf64_alpha_final_link | |
133 | PARAMS((bfd *, struct bfd_link_info *)); | |
cd6f9321 L |
134 | static boolean elf64_alpha_merge_ind_symbols |
135 | PARAMS((struct alpha_elf_link_hash_entry *, PTR)); | |
136 | static Elf_Internal_Rela * elf64_alpha_find_reloc_at_ofs | |
137 | PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma, int)); | |
fcfbdf31 | 138 | static enum elf_reloc_type_class elf64_alpha_reloc_type_class |
f51e552e | 139 | PARAMS ((const Elf_Internal_Rela *)); |
252b5132 RH |
140 | \f |
141 | struct alpha_elf_link_hash_entry | |
142 | { | |
143 | struct elf_link_hash_entry root; | |
144 | ||
145 | /* External symbol information. */ | |
146 | EXTR esym; | |
147 | ||
148 | /* Cumulative flags for all the .got entries. */ | |
149 | int flags; | |
150 | ||
151 | /* Contexts (LITUSE) in which a literal was referenced. */ | |
152 | #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01 | |
153 | #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02 | |
154 | #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04 | |
155 | #define ALPHA_ELF_LINK_HASH_LU_FUNC 0x08 | |
156 | ||
157 | /* Used to implement multiple .got subsections. */ | |
158 | struct alpha_elf_got_entry | |
159 | { | |
160 | struct alpha_elf_got_entry *next; | |
161 | ||
162 | /* which .got subsection? */ | |
163 | bfd *gotobj; | |
164 | ||
165 | /* the addend in effect for this entry. */ | |
dc810e39 | 166 | bfd_vma addend; |
252b5132 RH |
167 | |
168 | /* the .got offset for this entry. */ | |
169 | int got_offset; | |
170 | ||
171 | int flags; | |
172 | ||
f7460f5f | 173 | /* Additional flags. */ |
252b5132 | 174 | #define ALPHA_ELF_GOT_ENTRY_RELOCS_DONE 0x10 |
f7460f5f | 175 | #define ALPHA_ELF_GOT_ENTRY_RELOCS_XLATED 0x20 |
252b5132 RH |
176 | |
177 | int use_count; | |
178 | } *got_entries; | |
179 | ||
180 | /* used to count non-got, non-plt relocations for delayed sizing | |
181 | of relocation sections. */ | |
182 | struct alpha_elf_reloc_entry | |
183 | { | |
184 | struct alpha_elf_reloc_entry *next; | |
185 | ||
186 | /* which .reloc section? */ | |
187 | asection *srel; | |
188 | ||
189 | /* what kind of relocation? */ | |
fcfbdf31 JJ |
190 | unsigned int rtype; |
191 | ||
192 | /* is this against read-only section? */ | |
193 | unsigned int reltext : 1; | |
252b5132 RH |
194 | |
195 | /* how many did we find? */ | |
196 | unsigned long count; | |
197 | } *reloc_entries; | |
198 | }; | |
199 | ||
200 | /* Alpha ELF linker hash table. */ | |
201 | ||
202 | struct alpha_elf_link_hash_table | |
203 | { | |
204 | struct elf_link_hash_table root; | |
205 | ||
206 | /* The head of a list of .got subsections linked through | |
207 | alpha_elf_tdata(abfd)->got_link_next. */ | |
208 | bfd *got_list; | |
209 | }; | |
210 | ||
211 | /* Look up an entry in a Alpha ELF linker hash table. */ | |
212 | ||
213 | #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \ | |
214 | ((struct alpha_elf_link_hash_entry *) \ | |
215 | elf_link_hash_lookup (&(table)->root, (string), (create), \ | |
216 | (copy), (follow))) | |
217 | ||
218 | /* Traverse a Alpha ELF linker hash table. */ | |
219 | ||
220 | #define alpha_elf_link_hash_traverse(table, func, info) \ | |
221 | (elf_link_hash_traverse \ | |
222 | (&(table)->root, \ | |
223 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
224 | (info))) | |
225 | ||
226 | /* Get the Alpha ELF linker hash table from a link_info structure. */ | |
227 | ||
228 | #define alpha_elf_hash_table(p) \ | |
229 | ((struct alpha_elf_link_hash_table *) ((p)->hash)) | |
230 | ||
231 | /* Get the object's symbols as our own entry type. */ | |
232 | ||
233 | #define alpha_elf_sym_hashes(abfd) \ | |
234 | ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd)) | |
235 | ||
236 | /* Should we do dynamic things to this symbol? */ | |
237 | ||
8fb35fed RH |
238 | static int |
239 | alpha_elf_dynamic_symbol_p (h, info) | |
240 | struct elf_link_hash_entry *h; | |
241 | struct bfd_link_info *info; | |
242 | { | |
243 | if (h == NULL) | |
244 | return false; | |
245 | ||
246 | while (h->root.type == bfd_link_hash_indirect | |
247 | || h->root.type == bfd_link_hash_warning) | |
248 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
249 | ||
250 | if (h->dynindx == -1) | |
251 | return false; | |
ca88208a RH |
252 | |
253 | if (h->root.type == bfd_link_hash_undefweak | |
254 | || h->root.type == bfd_link_hash_defweak) | |
255 | return true; | |
256 | ||
2719f880 L |
257 | switch (ELF_ST_VISIBILITY (h->other)) |
258 | { | |
ca88208a RH |
259 | case STV_DEFAULT: |
260 | break; | |
2719f880 | 261 | case STV_HIDDEN: |
ca88208a | 262 | case STV_INTERNAL: |
2719f880 | 263 | return false; |
ca88208a RH |
264 | case STV_PROTECTED: |
265 | if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) | |
266 | return false; | |
267 | break; | |
2719f880 | 268 | } |
8fb35fed | 269 | |
8fb35fed RH |
270 | if ((info->shared && !info->symbolic) |
271 | || ((h->elf_link_hash_flags | |
272 | & (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) | |
273 | == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR))) | |
274 | return true; | |
275 | ||
276 | return false; | |
277 | } | |
252b5132 RH |
278 | |
279 | /* Create an entry in a Alpha ELF linker hash table. */ | |
280 | ||
281 | static struct bfd_hash_entry * | |
282 | elf64_alpha_link_hash_newfunc (entry, table, string) | |
283 | struct bfd_hash_entry *entry; | |
284 | struct bfd_hash_table *table; | |
285 | const char *string; | |
286 | { | |
287 | struct alpha_elf_link_hash_entry *ret = | |
288 | (struct alpha_elf_link_hash_entry *) entry; | |
289 | ||
290 | /* Allocate the structure if it has not already been allocated by a | |
291 | subclass. */ | |
292 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) | |
293 | ret = ((struct alpha_elf_link_hash_entry *) | |
294 | bfd_hash_allocate (table, | |
295 | sizeof (struct alpha_elf_link_hash_entry))); | |
296 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) | |
297 | return (struct bfd_hash_entry *) ret; | |
298 | ||
299 | /* Call the allocation method of the superclass. */ | |
300 | ret = ((struct alpha_elf_link_hash_entry *) | |
301 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
302 | table, string)); | |
303 | if (ret != (struct alpha_elf_link_hash_entry *) NULL) | |
304 | { | |
305 | /* Set local fields. */ | |
306 | memset (&ret->esym, 0, sizeof (EXTR)); | |
307 | /* We use -2 as a marker to indicate that the information has | |
308 | not been set. -1 means there is no associated ifd. */ | |
309 | ret->esym.ifd = -2; | |
310 | ret->flags = 0; | |
311 | ret->got_entries = NULL; | |
312 | ret->reloc_entries = NULL; | |
313 | } | |
314 | ||
315 | return (struct bfd_hash_entry *) ret; | |
316 | } | |
317 | ||
318 | /* Create a Alpha ELF linker hash table. */ | |
319 | ||
320 | static struct bfd_link_hash_table * | |
321 | elf64_alpha_bfd_link_hash_table_create (abfd) | |
322 | bfd *abfd; | |
323 | { | |
324 | struct alpha_elf_link_hash_table *ret; | |
dc810e39 | 325 | bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table); |
252b5132 | 326 | |
dc810e39 | 327 | ret = (struct alpha_elf_link_hash_table *) bfd_zalloc (abfd, amt); |
252b5132 RH |
328 | if (ret == (struct alpha_elf_link_hash_table *) NULL) |
329 | return NULL; | |
330 | ||
331 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
332 | elf64_alpha_link_hash_newfunc)) | |
333 | { | |
334 | bfd_release (abfd, ret); | |
335 | return NULL; | |
336 | } | |
337 | ||
338 | return &ret->root.root; | |
339 | } | |
340 | \f | |
341 | /* We have some private fields hanging off of the elf_tdata structure. */ | |
342 | ||
343 | struct alpha_elf_obj_tdata | |
344 | { | |
345 | struct elf_obj_tdata root; | |
346 | ||
347 | /* For every input file, these are the got entries for that object's | |
348 | local symbols. */ | |
349 | struct alpha_elf_got_entry ** local_got_entries; | |
350 | ||
351 | /* For every input file, this is the object that owns the got that | |
352 | this input file uses. */ | |
353 | bfd *gotobj; | |
354 | ||
355 | /* For every got, this is a linked list through the objects using this got */ | |
356 | bfd *in_got_link_next; | |
357 | ||
358 | /* For every got, this is a link to the next got subsegment. */ | |
359 | bfd *got_link_next; | |
360 | ||
361 | /* For every got, this is the section. */ | |
362 | asection *got; | |
363 | ||
364 | /* For every got, this is it's total number of *entries*. */ | |
365 | int total_got_entries; | |
366 | ||
367 | /* For every got, this is the sum of the number of *entries* required | |
368 | to hold all of the member object's local got. */ | |
369 | int n_local_got_entries; | |
370 | }; | |
371 | ||
372 | #define alpha_elf_tdata(abfd) \ | |
373 | ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) | |
374 | ||
375 | static boolean | |
376 | elf64_alpha_mkobject (abfd) | |
377 | bfd *abfd; | |
378 | { | |
dc810e39 AM |
379 | bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata); |
380 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
252b5132 RH |
381 | if (abfd->tdata.any == NULL) |
382 | return false; | |
383 | return true; | |
384 | } | |
385 | ||
386 | static boolean | |
387 | elf64_alpha_object_p (abfd) | |
388 | bfd *abfd; | |
389 | { | |
390 | /* Allocate our special target data. */ | |
391 | struct alpha_elf_obj_tdata *new_tdata; | |
dc810e39 AM |
392 | bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata); |
393 | new_tdata = bfd_zalloc (abfd, amt); | |
252b5132 RH |
394 | if (new_tdata == NULL) |
395 | return false; | |
396 | new_tdata->root = *abfd->tdata.elf_obj_data; | |
397 | abfd->tdata.any = new_tdata; | |
398 | ||
399 | /* Set the right machine number for an Alpha ELF file. */ | |
400 | return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); | |
401 | } | |
402 | \f | |
403 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
404 | from smaller values. Start with zero, widen, *then* decrement. */ | |
405 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
406 | ||
dfe57ca0 RH |
407 | #define SKIP_HOWTO(N) \ |
408 | HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0) | |
409 | ||
252b5132 RH |
410 | static reloc_howto_type elf64_alpha_howto_table[] = |
411 | { | |
412 | HOWTO (R_ALPHA_NONE, /* type */ | |
413 | 0, /* rightshift */ | |
414 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
415 | 8, /* bitsize */ | |
416 | true, /* pc_relative */ | |
417 | 0, /* bitpos */ | |
418 | complain_overflow_dont, /* complain_on_overflow */ | |
419 | elf64_alpha_reloc_nil, /* special_function */ | |
420 | "NONE", /* name */ | |
421 | false, /* partial_inplace */ | |
422 | 0, /* src_mask */ | |
423 | 0, /* dst_mask */ | |
424 | true), /* pcrel_offset */ | |
425 | ||
426 | /* A 32 bit reference to a symbol. */ | |
427 | HOWTO (R_ALPHA_REFLONG, /* type */ | |
428 | 0, /* rightshift */ | |
429 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
430 | 32, /* bitsize */ | |
431 | false, /* pc_relative */ | |
432 | 0, /* bitpos */ | |
433 | complain_overflow_bitfield, /* complain_on_overflow */ | |
434 | 0, /* special_function */ | |
435 | "REFLONG", /* name */ | |
436 | false, /* partial_inplace */ | |
437 | 0xffffffff, /* src_mask */ | |
438 | 0xffffffff, /* dst_mask */ | |
439 | false), /* pcrel_offset */ | |
440 | ||
441 | /* A 64 bit reference to a symbol. */ | |
442 | HOWTO (R_ALPHA_REFQUAD, /* type */ | |
443 | 0, /* rightshift */ | |
444 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
445 | 64, /* bitsize */ | |
446 | false, /* pc_relative */ | |
447 | 0, /* bitpos */ | |
448 | complain_overflow_bitfield, /* complain_on_overflow */ | |
449 | 0, /* special_function */ | |
450 | "REFQUAD", /* name */ | |
451 | false, /* partial_inplace */ | |
452 | MINUS_ONE, /* src_mask */ | |
453 | MINUS_ONE, /* dst_mask */ | |
454 | false), /* pcrel_offset */ | |
455 | ||
456 | /* A 32 bit GP relative offset. This is just like REFLONG except | |
457 | that when the value is used the value of the gp register will be | |
458 | added in. */ | |
459 | HOWTO (R_ALPHA_GPREL32, /* type */ | |
460 | 0, /* rightshift */ | |
461 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
462 | 32, /* bitsize */ | |
463 | false, /* pc_relative */ | |
464 | 0, /* bitpos */ | |
465 | complain_overflow_bitfield, /* complain_on_overflow */ | |
466 | 0, /* special_function */ | |
467 | "GPREL32", /* name */ | |
468 | false, /* partial_inplace */ | |
469 | 0xffffffff, /* src_mask */ | |
470 | 0xffffffff, /* dst_mask */ | |
471 | false), /* pcrel_offset */ | |
472 | ||
473 | /* Used for an instruction that refers to memory off the GP register. */ | |
474 | HOWTO (R_ALPHA_LITERAL, /* type */ | |
475 | 0, /* rightshift */ | |
dfe57ca0 | 476 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
252b5132 RH |
477 | 16, /* bitsize */ |
478 | false, /* pc_relative */ | |
479 | 0, /* bitpos */ | |
480 | complain_overflow_signed, /* complain_on_overflow */ | |
481 | 0, /* special_function */ | |
482 | "ELF_LITERAL", /* name */ | |
483 | false, /* partial_inplace */ | |
484 | 0xffff, /* src_mask */ | |
485 | 0xffff, /* dst_mask */ | |
486 | false), /* pcrel_offset */ | |
487 | ||
488 | /* This reloc only appears immediately following an ELF_LITERAL reloc. | |
489 | It identifies a use of the literal. The symbol index is special: | |
490 | 1 means the literal address is in the base register of a memory | |
491 | format instruction; 2 means the literal address is in the byte | |
492 | offset register of a byte-manipulation instruction; 3 means the | |
493 | literal address is in the target register of a jsr instruction. | |
494 | This does not actually do any relocation. */ | |
495 | HOWTO (R_ALPHA_LITUSE, /* type */ | |
496 | 0, /* rightshift */ | |
dfe57ca0 | 497 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
252b5132 RH |
498 | 32, /* bitsize */ |
499 | false, /* pc_relative */ | |
500 | 0, /* bitpos */ | |
501 | complain_overflow_dont, /* complain_on_overflow */ | |
502 | elf64_alpha_reloc_nil, /* special_function */ | |
503 | "LITUSE", /* name */ | |
504 | false, /* partial_inplace */ | |
505 | 0, /* src_mask */ | |
506 | 0, /* dst_mask */ | |
507 | false), /* pcrel_offset */ | |
508 | ||
509 | /* Load the gp register. This is always used for a ldah instruction | |
510 | which loads the upper 16 bits of the gp register. The symbol | |
511 | index of the GPDISP instruction is an offset in bytes to the lda | |
512 | instruction that loads the lower 16 bits. The value to use for | |
513 | the relocation is the difference between the GP value and the | |
514 | current location; the load will always be done against a register | |
515 | holding the current address. | |
516 | ||
517 | NOTE: Unlike ECOFF, partial in-place relocation is not done. If | |
518 | any offset is present in the instructions, it is an offset from | |
519 | the register to the ldah instruction. This lets us avoid any | |
520 | stupid hackery like inventing a gp value to do partial relocation | |
521 | against. Also unlike ECOFF, we do the whole relocation off of | |
522 | the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd, | |
523 | space consuming bit, that, since all the information was present | |
524 | in the GPDISP_HI16 reloc. */ | |
525 | HOWTO (R_ALPHA_GPDISP, /* type */ | |
526 | 16, /* rightshift */ | |
527 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
528 | 16, /* bitsize */ | |
529 | false, /* pc_relative */ | |
530 | 0, /* bitpos */ | |
531 | complain_overflow_dont, /* complain_on_overflow */ | |
532 | elf64_alpha_reloc_gpdisp, /* special_function */ | |
533 | "GPDISP", /* name */ | |
534 | false, /* partial_inplace */ | |
535 | 0xffff, /* src_mask */ | |
536 | 0xffff, /* dst_mask */ | |
537 | true), /* pcrel_offset */ | |
538 | ||
539 | /* A 21 bit branch. */ | |
540 | HOWTO (R_ALPHA_BRADDR, /* type */ | |
541 | 2, /* rightshift */ | |
542 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
543 | 21, /* bitsize */ | |
544 | true, /* pc_relative */ | |
545 | 0, /* bitpos */ | |
546 | complain_overflow_signed, /* complain_on_overflow */ | |
547 | 0, /* special_function */ | |
548 | "BRADDR", /* name */ | |
549 | false, /* partial_inplace */ | |
550 | 0x1fffff, /* src_mask */ | |
551 | 0x1fffff, /* dst_mask */ | |
552 | true), /* pcrel_offset */ | |
553 | ||
554 | /* A hint for a jump to a register. */ | |
555 | HOWTO (R_ALPHA_HINT, /* type */ | |
556 | 2, /* rightshift */ | |
dfe57ca0 | 557 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
252b5132 RH |
558 | 14, /* bitsize */ |
559 | true, /* pc_relative */ | |
560 | 0, /* bitpos */ | |
561 | complain_overflow_dont, /* complain_on_overflow */ | |
562 | 0, /* special_function */ | |
563 | "HINT", /* name */ | |
564 | false, /* partial_inplace */ | |
565 | 0x3fff, /* src_mask */ | |
566 | 0x3fff, /* dst_mask */ | |
567 | true), /* pcrel_offset */ | |
568 | ||
569 | /* 16 bit PC relative offset. */ | |
570 | HOWTO (R_ALPHA_SREL16, /* type */ | |
571 | 0, /* rightshift */ | |
572 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
573 | 16, /* bitsize */ | |
574 | true, /* pc_relative */ | |
575 | 0, /* bitpos */ | |
576 | complain_overflow_signed, /* complain_on_overflow */ | |
577 | 0, /* special_function */ | |
578 | "SREL16", /* name */ | |
579 | false, /* partial_inplace */ | |
580 | 0xffff, /* src_mask */ | |
581 | 0xffff, /* dst_mask */ | |
16b65e4e | 582 | true), /* pcrel_offset */ |
252b5132 RH |
583 | |
584 | /* 32 bit PC relative offset. */ | |
585 | HOWTO (R_ALPHA_SREL32, /* type */ | |
586 | 0, /* rightshift */ | |
587 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
588 | 32, /* bitsize */ | |
589 | true, /* pc_relative */ | |
590 | 0, /* bitpos */ | |
591 | complain_overflow_signed, /* complain_on_overflow */ | |
592 | 0, /* special_function */ | |
593 | "SREL32", /* name */ | |
594 | false, /* partial_inplace */ | |
595 | 0xffffffff, /* src_mask */ | |
596 | 0xffffffff, /* dst_mask */ | |
16b65e4e | 597 | true), /* pcrel_offset */ |
252b5132 RH |
598 | |
599 | /* A 64 bit PC relative offset. */ | |
600 | HOWTO (R_ALPHA_SREL64, /* type */ | |
601 | 0, /* rightshift */ | |
602 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
603 | 64, /* bitsize */ | |
604 | true, /* pc_relative */ | |
605 | 0, /* bitpos */ | |
606 | complain_overflow_signed, /* complain_on_overflow */ | |
607 | 0, /* special_function */ | |
608 | "SREL64", /* name */ | |
609 | false, /* partial_inplace */ | |
610 | MINUS_ONE, /* src_mask */ | |
611 | MINUS_ONE, /* dst_mask */ | |
16b65e4e | 612 | true), /* pcrel_offset */ |
252b5132 | 613 | |
dfe57ca0 RH |
614 | /* Skip 12 - 16; deprecated ECOFF relocs. */ |
615 | SKIP_HOWTO (12), | |
616 | SKIP_HOWTO (13), | |
617 | SKIP_HOWTO (14), | |
618 | SKIP_HOWTO (15), | |
619 | SKIP_HOWTO (16), | |
252b5132 RH |
620 | |
621 | /* The high 16 bits of the displacement from GP to the target. */ | |
622 | HOWTO (R_ALPHA_GPRELHIGH, | |
623 | 0, /* rightshift */ | |
dfe57ca0 | 624 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
252b5132 RH |
625 | 16, /* bitsize */ |
626 | false, /* pc_relative */ | |
627 | 0, /* bitpos */ | |
628 | complain_overflow_signed, /* complain_on_overflow */ | |
dfe57ca0 | 629 | 0, /* special_function */ |
252b5132 RH |
630 | "GPRELHIGH", /* name */ |
631 | false, /* partial_inplace */ | |
632 | 0xffff, /* src_mask */ | |
633 | 0xffff, /* dst_mask */ | |
634 | false), /* pcrel_offset */ | |
635 | ||
636 | /* The low 16 bits of the displacement from GP to the target. */ | |
637 | HOWTO (R_ALPHA_GPRELLOW, | |
638 | 0, /* rightshift */ | |
dfe57ca0 | 639 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
252b5132 RH |
640 | 16, /* bitsize */ |
641 | false, /* pc_relative */ | |
642 | 0, /* bitpos */ | |
643 | complain_overflow_dont, /* complain_on_overflow */ | |
dfe57ca0 | 644 | 0, /* special_function */ |
252b5132 RH |
645 | "GPRELLOW", /* name */ |
646 | false, /* partial_inplace */ | |
647 | 0xffff, /* src_mask */ | |
648 | 0xffff, /* dst_mask */ | |
649 | false), /* pcrel_offset */ | |
650 | ||
651 | /* A 16-bit displacement from the GP to the target. */ | |
dfe57ca0 | 652 | HOWTO (R_ALPHA_GPREL16, |
252b5132 | 653 | 0, /* rightshift */ |
dfe57ca0 | 654 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
252b5132 RH |
655 | 16, /* bitsize */ |
656 | false, /* pc_relative */ | |
657 | 0, /* bitpos */ | |
658 | complain_overflow_signed, /* complain_on_overflow */ | |
659 | 0, /* special_function */ | |
dfe57ca0 | 660 | "GPREL16", /* name */ |
252b5132 RH |
661 | false, /* partial_inplace */ |
662 | 0xffff, /* src_mask */ | |
663 | 0xffff, /* dst_mask */ | |
664 | false), /* pcrel_offset */ | |
665 | ||
dfe57ca0 RH |
666 | /* Skip 20 - 23; deprecated ECOFF relocs. */ |
667 | SKIP_HOWTO (20), | |
668 | SKIP_HOWTO (21), | |
669 | SKIP_HOWTO (22), | |
670 | SKIP_HOWTO (23), | |
252b5132 | 671 | |
fe8bc63d | 672 | /* Misc ELF relocations. */ |
252b5132 RH |
673 | |
674 | /* A dynamic relocation to copy the target into our .dynbss section. */ | |
675 | /* Not generated, as all Alpha objects use PIC, so it is not needed. It | |
676 | is present because every other ELF has one, but should not be used | |
677 | because .dynbss is an ugly thing. */ | |
678 | HOWTO (R_ALPHA_COPY, | |
679 | 0, | |
680 | 0, | |
681 | 0, | |
682 | false, | |
683 | 0, | |
684 | complain_overflow_dont, | |
685 | bfd_elf_generic_reloc, | |
686 | "COPY", | |
687 | false, | |
688 | 0, | |
689 | 0, | |
690 | true), | |
691 | ||
692 | /* A dynamic relocation for a .got entry. */ | |
693 | HOWTO (R_ALPHA_GLOB_DAT, | |
694 | 0, | |
695 | 0, | |
696 | 0, | |
697 | false, | |
698 | 0, | |
699 | complain_overflow_dont, | |
700 | bfd_elf_generic_reloc, | |
701 | "GLOB_DAT", | |
702 | false, | |
703 | 0, | |
704 | 0, | |
705 | true), | |
706 | ||
707 | /* A dynamic relocation for a .plt entry. */ | |
708 | HOWTO (R_ALPHA_JMP_SLOT, | |
709 | 0, | |
710 | 0, | |
711 | 0, | |
712 | false, | |
713 | 0, | |
714 | complain_overflow_dont, | |
715 | bfd_elf_generic_reloc, | |
716 | "JMP_SLOT", | |
717 | false, | |
718 | 0, | |
719 | 0, | |
720 | true), | |
721 | ||
722 | /* A dynamic relocation to add the base of the DSO to a 64-bit field. */ | |
723 | HOWTO (R_ALPHA_RELATIVE, | |
724 | 0, | |
725 | 0, | |
726 | 0, | |
727 | false, | |
728 | 0, | |
729 | complain_overflow_dont, | |
730 | bfd_elf_generic_reloc, | |
731 | "RELATIVE", | |
732 | false, | |
733 | 0, | |
734 | 0, | |
7793f4d0 RH |
735 | true), |
736 | ||
737 | /* A 21 bit branch that adjusts for gp loads. */ | |
738 | HOWTO (R_ALPHA_BRSGP, /* type */ | |
739 | 2, /* rightshift */ | |
740 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
741 | 21, /* bitsize */ | |
742 | true, /* pc_relative */ | |
743 | 0, /* bitpos */ | |
744 | complain_overflow_signed, /* complain_on_overflow */ | |
745 | 0, /* special_function */ | |
746 | "BRSGP", /* name */ | |
747 | false, /* partial_inplace */ | |
748 | 0x1fffff, /* src_mask */ | |
749 | 0x1fffff, /* dst_mask */ | |
750 | true), /* pcrel_offset */ | |
252b5132 RH |
751 | }; |
752 | ||
753 | /* A relocation function which doesn't do anything. */ | |
754 | ||
755 | static bfd_reloc_status_type | |
756 | elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) | |
56fc028e | 757 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 758 | arelent *reloc; |
56fc028e AJ |
759 | asymbol *sym ATTRIBUTE_UNUSED; |
760 | PTR data ATTRIBUTE_UNUSED; | |
252b5132 RH |
761 | asection *sec; |
762 | bfd *output_bfd; | |
56fc028e | 763 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
764 | { |
765 | if (output_bfd) | |
766 | reloc->address += sec->output_offset; | |
767 | return bfd_reloc_ok; | |
768 | } | |
769 | ||
770 | /* A relocation function used for an unsupported reloc. */ | |
771 | ||
772 | static bfd_reloc_status_type | |
773 | elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message) | |
56fc028e | 774 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 | 775 | arelent *reloc; |
56fc028e AJ |
776 | asymbol *sym ATTRIBUTE_UNUSED; |
777 | PTR data ATTRIBUTE_UNUSED; | |
252b5132 RH |
778 | asection *sec; |
779 | bfd *output_bfd; | |
56fc028e | 780 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
781 | { |
782 | if (output_bfd) | |
783 | reloc->address += sec->output_offset; | |
784 | return bfd_reloc_notsupported; | |
785 | } | |
786 | ||
787 | /* Do the work of the GPDISP relocation. */ | |
788 | ||
789 | static bfd_reloc_status_type | |
790 | elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda) | |
791 | bfd *abfd; | |
792 | bfd_vma gpdisp; | |
793 | bfd_byte *p_ldah; | |
794 | bfd_byte *p_lda; | |
795 | { | |
796 | bfd_reloc_status_type ret = bfd_reloc_ok; | |
797 | bfd_vma addend; | |
798 | unsigned long i_ldah, i_lda; | |
799 | ||
800 | i_ldah = bfd_get_32 (abfd, p_ldah); | |
801 | i_lda = bfd_get_32 (abfd, p_lda); | |
802 | ||
803 | /* Complain if the instructions are not correct. */ | |
804 | if (((i_ldah >> 26) & 0x3f) != 0x09 | |
805 | || ((i_lda >> 26) & 0x3f) != 0x08) | |
806 | ret = bfd_reloc_dangerous; | |
807 | ||
808 | /* Extract the user-supplied offset, mirroring the sign extensions | |
809 | that the instructions perform. */ | |
810 | addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); | |
811 | addend = (addend ^ 0x80008000) - 0x80008000; | |
812 | ||
813 | gpdisp += addend; | |
814 | ||
815 | if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000 | |
816 | || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000) | |
817 | ret = bfd_reloc_overflow; | |
818 | ||
819 | /* compensate for the sign extension again. */ | |
820 | i_ldah = ((i_ldah & 0xffff0000) | |
821 | | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff)); | |
822 | i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff); | |
823 | ||
dc810e39 AM |
824 | bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah); |
825 | bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda); | |
252b5132 RH |
826 | |
827 | return ret; | |
828 | } | |
829 | ||
830 | /* The special function for the GPDISP reloc. */ | |
831 | ||
832 | static bfd_reloc_status_type | |
833 | elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section, | |
834 | output_bfd, err_msg) | |
835 | bfd *abfd; | |
836 | arelent *reloc_entry; | |
56fc028e | 837 | asymbol *sym ATTRIBUTE_UNUSED; |
252b5132 RH |
838 | PTR data; |
839 | asection *input_section; | |
840 | bfd *output_bfd; | |
841 | char **err_msg; | |
842 | { | |
843 | bfd_reloc_status_type ret; | |
844 | bfd_vma gp, relocation; | |
845 | bfd_byte *p_ldah, *p_lda; | |
846 | ||
847 | /* Don't do anything if we're not doing a final link. */ | |
848 | if (output_bfd) | |
849 | { | |
850 | reloc_entry->address += input_section->output_offset; | |
851 | return bfd_reloc_ok; | |
852 | } | |
853 | ||
854 | if (reloc_entry->address > input_section->_cooked_size || | |
855 | reloc_entry->address + reloc_entry->addend > input_section->_cooked_size) | |
856 | return bfd_reloc_outofrange; | |
857 | ||
858 | /* The gp used in the portion of the output object to which this | |
859 | input object belongs is cached on the input bfd. */ | |
860 | gp = _bfd_get_gp_value (abfd); | |
861 | ||
862 | relocation = (input_section->output_section->vma | |
863 | + input_section->output_offset | |
864 | + reloc_entry->address); | |
865 | ||
866 | p_ldah = (bfd_byte *) data + reloc_entry->address; | |
867 | p_lda = p_ldah + reloc_entry->addend; | |
868 | ||
869 | ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda); | |
870 | ||
871 | /* Complain if the instructions are not correct. */ | |
872 | if (ret == bfd_reloc_dangerous) | |
873 | *err_msg = _("GPDISP relocation did not find ldah and lda instructions"); | |
874 | ||
875 | return ret; | |
876 | } | |
877 | ||
878 | /* A mapping from BFD reloc types to Alpha ELF reloc types. */ | |
879 | ||
880 | struct elf_reloc_map | |
881 | { | |
882 | bfd_reloc_code_real_type bfd_reloc_val; | |
883 | int elf_reloc_val; | |
884 | }; | |
885 | ||
886 | static const struct elf_reloc_map elf64_alpha_reloc_map[] = | |
887 | { | |
dfe57ca0 RH |
888 | {BFD_RELOC_NONE, R_ALPHA_NONE}, |
889 | {BFD_RELOC_32, R_ALPHA_REFLONG}, | |
890 | {BFD_RELOC_64, R_ALPHA_REFQUAD}, | |
891 | {BFD_RELOC_CTOR, R_ALPHA_REFQUAD}, | |
892 | {BFD_RELOC_GPREL32, R_ALPHA_GPREL32}, | |
893 | {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL}, | |
894 | {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE}, | |
895 | {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP}, | |
896 | {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR}, | |
897 | {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT}, | |
898 | {BFD_RELOC_16_PCREL, R_ALPHA_SREL16}, | |
899 | {BFD_RELOC_32_PCREL, R_ALPHA_SREL32}, | |
900 | {BFD_RELOC_64_PCREL, R_ALPHA_SREL64}, | |
901 | {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH}, | |
902 | {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW}, | |
903 | {BFD_RELOC_GPREL16, R_ALPHA_GPREL16}, | |
7793f4d0 | 904 | {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP}, |
252b5132 RH |
905 | }; |
906 | ||
907 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
908 | ||
909 | static reloc_howto_type * | |
910 | elf64_alpha_bfd_reloc_type_lookup (abfd, code) | |
56fc028e | 911 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
912 | bfd_reloc_code_real_type code; |
913 | { | |
914 | const struct elf_reloc_map *i, *e; | |
915 | i = e = elf64_alpha_reloc_map; | |
916 | e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map); | |
917 | for (; i != e; ++i) | |
918 | { | |
919 | if (i->bfd_reloc_val == code) | |
920 | return &elf64_alpha_howto_table[i->elf_reloc_val]; | |
921 | } | |
922 | return 0; | |
923 | } | |
924 | ||
925 | /* Given an Alpha ELF reloc type, fill in an arelent structure. */ | |
926 | ||
927 | static void | |
928 | elf64_alpha_info_to_howto (abfd, cache_ptr, dst) | |
56fc028e | 929 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
930 | arelent *cache_ptr; |
931 | Elf64_Internal_Rela *dst; | |
932 | { | |
933 | unsigned r_type; | |
934 | ||
935 | r_type = ELF64_R_TYPE(dst->r_info); | |
936 | BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max); | |
937 | cache_ptr->howto = &elf64_alpha_howto_table[r_type]; | |
938 | } | |
939 | \f | |
fe8bc63d | 940 | /* These functions do relaxation for Alpha ELF. |
252b5132 RH |
941 | |
942 | Currently I'm only handling what I can do with existing compiler | |
943 | and assembler support, which means no instructions are removed, | |
944 | though some may be nopped. At this time GCC does not emit enough | |
945 | information to do all of the relaxing that is possible. It will | |
946 | take some not small amount of work for that to happen. | |
947 | ||
948 | There are a couple of interesting papers that I once read on this | |
949 | subject, that I cannot find references to at the moment, that | |
950 | related to Alpha in particular. They are by David Wall, then of | |
951 | DEC WRL. */ | |
952 | ||
953 | #define OP_LDA 0x08 | |
954 | #define OP_LDAH 0x09 | |
955 | #define INSN_JSR 0x68004000 | |
956 | #define INSN_JSR_MASK 0xfc00c000 | |
957 | #define OP_LDQ 0x29 | |
958 | #define OP_BR 0x30 | |
959 | #define OP_BSR 0x34 | |
f304919d | 960 | #define INSN_UNOP 0x2ffe0000 |
252b5132 RH |
961 | |
962 | struct alpha_relax_info | |
963 | { | |
964 | bfd *abfd; | |
965 | asection *sec; | |
966 | bfd_byte *contents; | |
967 | Elf_Internal_Rela *relocs, *relend; | |
968 | struct bfd_link_info *link_info; | |
969 | boolean changed_contents; | |
970 | boolean changed_relocs; | |
971 | bfd_vma gp; | |
972 | bfd *gotobj; | |
973 | asection *tsec; | |
974 | struct alpha_elf_link_hash_entry *h; | |
975 | struct alpha_elf_got_entry *gotent; | |
976 | unsigned char other; | |
977 | }; | |
978 | ||
979 | static Elf_Internal_Rela * elf64_alpha_relax_with_lituse | |
fe8bc63d | 980 | PARAMS((struct alpha_relax_info *info, bfd_vma symval, |
252b5132 RH |
981 | Elf_Internal_Rela *irel, Elf_Internal_Rela *irelend)); |
982 | ||
983 | static boolean elf64_alpha_relax_without_lituse | |
fe8bc63d | 984 | PARAMS((struct alpha_relax_info *info, bfd_vma symval, |
252b5132 RH |
985 | Elf_Internal_Rela *irel)); |
986 | ||
987 | static bfd_vma elf64_alpha_relax_opt_call | |
988 | PARAMS((struct alpha_relax_info *info, bfd_vma symval)); | |
989 | ||
990 | static boolean elf64_alpha_relax_section | |
991 | PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info, | |
992 | boolean *again)); | |
993 | ||
994 | static Elf_Internal_Rela * | |
995 | elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type) | |
996 | Elf_Internal_Rela *rel, *relend; | |
997 | bfd_vma offset; | |
998 | int type; | |
999 | { | |
1000 | while (rel < relend) | |
1001 | { | |
52b9d213 AM |
1002 | if (rel->r_offset == offset |
1003 | && ELF64_R_TYPE (rel->r_info) == (unsigned int) type) | |
252b5132 RH |
1004 | return rel; |
1005 | ++rel; | |
1006 | } | |
1007 | return NULL; | |
1008 | } | |
1009 | ||
1010 | static Elf_Internal_Rela * | |
1011 | elf64_alpha_relax_with_lituse (info, symval, irel, irelend) | |
1012 | struct alpha_relax_info *info; | |
1013 | bfd_vma symval; | |
1014 | Elf_Internal_Rela *irel, *irelend; | |
1015 | { | |
1016 | Elf_Internal_Rela *urel; | |
1017 | int flags, count, i; | |
1018 | bfd_signed_vma disp; | |
1019 | boolean fits16; | |
1020 | boolean fits32; | |
1021 | boolean lit_reused = false; | |
1022 | boolean all_optimized = true; | |
1023 | unsigned int lit_insn; | |
1024 | ||
1025 | lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); | |
1026 | if (lit_insn >> 26 != OP_LDQ) | |
1027 | { | |
1028 | ((*_bfd_error_handler) | |
1029 | ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn", | |
8f615d07 AM |
1030 | bfd_archive_filename (info->abfd), info->sec->name, |
1031 | (unsigned long) irel->r_offset)); | |
252b5132 RH |
1032 | return irel; |
1033 | } | |
1034 | ||
1035 | /* Summarize how this particular LITERAL is used. */ | |
1036 | for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count) | |
1037 | { | |
1038 | if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE) | |
1039 | break; | |
1e738b87 | 1040 | if (urel->r_addend <= 3) |
252b5132 RH |
1041 | flags |= 1 << urel->r_addend; |
1042 | } | |
1043 | ||
fe8bc63d | 1044 | /* A little preparation for the loop... */ |
252b5132 | 1045 | disp = symval - info->gp; |
252b5132 RH |
1046 | |
1047 | for (urel = irel+1, i = 0; i < count; ++i, ++urel) | |
1048 | { | |
1049 | unsigned int insn; | |
ffcb7aff NC |
1050 | int insn_disp; |
1051 | bfd_signed_vma xdisp; | |
1052 | ||
252b5132 RH |
1053 | insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset); |
1054 | ||
1055 | switch (urel->r_addend) | |
1056 | { | |
1057 | default: /* 0 = ADDRESS FORMAT */ | |
1058 | /* This type is really just a placeholder to note that all | |
1059 | uses cannot be optimized, but to still allow some. */ | |
1060 | all_optimized = false; | |
1061 | break; | |
1062 | ||
1063 | case 1: /* MEM FORMAT */ | |
1064 | /* We can always optimize 16-bit displacements. */ | |
ffcb7aff NC |
1065 | |
1066 | /* Extract the displacement from the instruction, sign-extending | |
1067 | it if necessary, then test whether it is within 16 or 32 bits | |
1068 | displacement from GP. */ | |
1069 | insn_disp = insn & 0x0000ffff; | |
1070 | if (insn_disp & 0x00008000) | |
1071 | insn_disp |= 0xffff0000; /* Negative: sign-extend. */ | |
1072 | ||
1073 | xdisp = disp + insn_disp; | |
1074 | fits16 = (xdisp >= - (bfd_signed_vma) 0x00008000 && xdisp < 0x00008000); | |
1075 | fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 && xdisp < 0x7fff8000); | |
1076 | ||
252b5132 RH |
1077 | if (fits16) |
1078 | { | |
ffcb7aff | 1079 | /* Take the op code and dest from this insn, take the base |
fe8bc63d | 1080 | register from the literal insn. Leave the offset alone. */ |
ffcb7aff | 1081 | insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000); |
252b5132 | 1082 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
dfe57ca0 | 1083 | R_ALPHA_GPREL16); |
252b5132 RH |
1084 | urel->r_addend = irel->r_addend; |
1085 | info->changed_relocs = true; | |
1086 | ||
dc810e39 AM |
1087 | bfd_put_32 (info->abfd, (bfd_vma) insn, |
1088 | info->contents + urel->r_offset); | |
252b5132 RH |
1089 | info->changed_contents = true; |
1090 | } | |
1091 | ||
1092 | /* If all mem+byte, we can optimize 32-bit mem displacements. */ | |
1093 | else if (fits32 && !(flags & ~6)) | |
1094 | { | |
ffcb7aff | 1095 | /* FIXME: sanity check that lit insn Ra is mem insn Rb. */ |
252b5132 RH |
1096 | |
1097 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), | |
1098 | R_ALPHA_GPRELHIGH); | |
1099 | lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000); | |
dc810e39 | 1100 | bfd_put_32 (info->abfd, (bfd_vma) lit_insn, |
252b5132 RH |
1101 | info->contents + irel->r_offset); |
1102 | lit_reused = true; | |
1103 | info->changed_contents = true; | |
1104 | ||
1105 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), | |
1106 | R_ALPHA_GPRELLOW); | |
1107 | urel->r_addend = irel->r_addend; | |
1108 | info->changed_relocs = true; | |
1109 | } | |
1110 | else | |
1111 | all_optimized = false; | |
1112 | break; | |
1113 | ||
1114 | case 2: /* BYTE OFFSET FORMAT */ | |
1115 | /* We can always optimize byte instructions. */ | |
1116 | ||
1117 | /* FIXME: sanity check the insn for byte op. Check that the | |
1118 | literal dest reg is indeed Rb in the byte insn. */ | |
1119 | ||
dc810e39 AM |
1120 | insn &= ~ (unsigned) 0x001ff000; |
1121 | insn |= ((symval & 7) << 13) | 0x1000; | |
252b5132 RH |
1122 | |
1123 | urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
1124 | urel->r_addend = 0; | |
1125 | info->changed_relocs = true; | |
1126 | ||
dc810e39 AM |
1127 | bfd_put_32 (info->abfd, (bfd_vma) insn, |
1128 | info->contents + urel->r_offset); | |
252b5132 RH |
1129 | info->changed_contents = true; |
1130 | break; | |
1131 | ||
1132 | case 3: /* CALL FORMAT */ | |
1133 | { | |
1134 | /* If not zero, place to jump without needing pv. */ | |
1135 | bfd_vma optdest = elf64_alpha_relax_opt_call (info, symval); | |
1136 | bfd_vma org = (info->sec->output_section->vma | |
1137 | + info->sec->output_offset | |
1138 | + urel->r_offset + 4); | |
1139 | bfd_signed_vma odisp; | |
1140 | ||
1141 | odisp = (optdest ? optdest : symval) - org; | |
1142 | if (odisp >= -0x400000 && odisp < 0x400000) | |
1143 | { | |
1144 | Elf_Internal_Rela *xrel; | |
1145 | ||
fe8bc63d | 1146 | /* Preserve branch prediction call stack when possible. */ |
252b5132 RH |
1147 | if ((insn & INSN_JSR_MASK) == INSN_JSR) |
1148 | insn = (OP_BSR << 26) | (insn & 0x03e00000); | |
1149 | else | |
1150 | insn = (OP_BR << 26) | (insn & 0x03e00000); | |
fe8bc63d | 1151 | |
252b5132 RH |
1152 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
1153 | R_ALPHA_BRADDR); | |
1154 | urel->r_addend = irel->r_addend; | |
1155 | ||
1156 | if (optdest) | |
1157 | urel->r_addend += optdest - symval; | |
1158 | else | |
1159 | all_optimized = false; | |
1160 | ||
dc810e39 AM |
1161 | bfd_put_32 (info->abfd, (bfd_vma) insn, |
1162 | info->contents + urel->r_offset); | |
252b5132 RH |
1163 | |
1164 | /* Kill any HINT reloc that might exist for this insn. */ | |
1165 | xrel = (elf64_alpha_find_reloc_at_ofs | |
fe8bc63d | 1166 | (info->relocs, info->relend, urel->r_offset, |
252b5132 RH |
1167 | R_ALPHA_HINT)); |
1168 | if (xrel) | |
1169 | xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
1170 | ||
1171 | info->changed_contents = true; | |
1172 | info->changed_relocs = true; | |
1173 | } | |
1174 | else | |
1175 | all_optimized = false; | |
1176 | ||
1cd6895c RH |
1177 | /* Even if the target is not in range for a direct branch, |
1178 | if we share a GP, we can eliminate the gp reload. */ | |
1179 | if (optdest) | |
1180 | { | |
1181 | Elf_Internal_Rela *gpdisp | |
1182 | = (elf64_alpha_find_reloc_at_ofs | |
1183 | (irel, irelend, urel->r_offset + 4, R_ALPHA_GPDISP)); | |
1184 | if (gpdisp) | |
1185 | { | |
1186 | bfd_byte *p_ldah = info->contents + gpdisp->r_offset; | |
1187 | bfd_byte *p_lda = p_ldah + gpdisp->r_addend; | |
1188 | unsigned int ldah = bfd_get_32 (info->abfd, p_ldah); | |
1189 | unsigned int lda = bfd_get_32 (info->abfd, p_lda); | |
1190 | ||
1191 | /* Verify that the instruction is "ldah $29,0($26)". | |
1192 | Consider a function that ends in a noreturn call, | |
1193 | and that the next function begins with an ldgp, | |
1194 | and that by accident there is no padding between. | |
1195 | In that case the insn would use $27 as the base. */ | |
1196 | if (ldah == 0x27ba0000 && lda == 0x23bd0000) | |
1197 | { | |
dc810e39 AM |
1198 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah); |
1199 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda); | |
1cd6895c RH |
1200 | |
1201 | gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
1202 | info->changed_contents = true; | |
1203 | info->changed_relocs = true; | |
1204 | } | |
1205 | } | |
1206 | } | |
252b5132 RH |
1207 | } |
1208 | break; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | /* If all cases were optimized, we can reduce the use count on this | |
1213 | got entry by one, possibly eliminating it. */ | |
1214 | if (all_optimized) | |
1215 | { | |
1216 | info->gotent->use_count -= 1; | |
1217 | alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1; | |
1218 | if (!info->h) | |
1219 | alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1; | |
1220 | ||
1221 | /* If the literal instruction is no longer needed (it may have been | |
1222 | reused. We can eliminate it. | |
1223 | ??? For now, I don't want to deal with compacting the section, | |
1224 | so just nop it out. */ | |
1225 | if (!lit_reused) | |
1226 | { | |
1227 | irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
1228 | info->changed_relocs = true; | |
1229 | ||
dc810e39 AM |
1230 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, |
1231 | info->contents + irel->r_offset); | |
252b5132 RH |
1232 | info->changed_contents = true; |
1233 | } | |
1234 | } | |
1235 | ||
1236 | return irel + count; | |
1237 | } | |
1238 | ||
1239 | static bfd_vma | |
1240 | elf64_alpha_relax_opt_call (info, symval) | |
1241 | struct alpha_relax_info *info; | |
1242 | bfd_vma symval; | |
1243 | { | |
1244 | /* If the function has the same gp, and we can identify that the | |
1245 | function does not use its function pointer, we can eliminate the | |
1246 | address load. */ | |
1247 | ||
1248 | /* If the symbol is marked NOPV, we are being told the function never | |
1249 | needs its procedure value. */ | |
c810873d | 1250 | if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV) |
252b5132 RH |
1251 | return symval; |
1252 | ||
1253 | /* If the symbol is marked STD_GP, we are being told the function does | |
fe8bc63d | 1254 | a normal ldgp in the first two words. */ |
c810873d | 1255 | else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD) |
252b5132 RH |
1256 | ; |
1257 | ||
1258 | /* Otherwise, we may be able to identify a GP load in the first two | |
1259 | words, which we can then skip. */ | |
fe8bc63d | 1260 | else |
252b5132 RH |
1261 | { |
1262 | Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; | |
1263 | bfd_vma ofs; | |
1264 | ||
fe8bc63d | 1265 | /* Load the relocations from the section that the target symbol is in. */ |
252b5132 RH |
1266 | if (info->sec == info->tsec) |
1267 | { | |
1268 | tsec_relocs = info->relocs; | |
1269 | tsec_relend = info->relend; | |
1270 | tsec_free = NULL; | |
1271 | } | |
1272 | else | |
1273 | { | |
1274 | tsec_relocs = (_bfd_elf64_link_read_relocs | |
1275 | (info->abfd, info->tsec, (PTR) NULL, | |
1276 | (Elf_Internal_Rela *) NULL, | |
1277 | info->link_info->keep_memory)); | |
1278 | if (tsec_relocs == NULL) | |
1279 | return 0; | |
1280 | tsec_relend = tsec_relocs + info->tsec->reloc_count; | |
1281 | tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs); | |
1282 | } | |
1283 | ||
1284 | /* Recover the symbol's offset within the section. */ | |
1285 | ofs = (symval - info->tsec->output_section->vma | |
1286 | - info->tsec->output_offset); | |
fe8bc63d | 1287 | |
252b5132 RH |
1288 | /* Look for a GPDISP reloc. */ |
1289 | gpdisp = (elf64_alpha_find_reloc_at_ofs | |
1290 | (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); | |
1291 | ||
1292 | if (!gpdisp || gpdisp->r_addend != 4) | |
1293 | { | |
1294 | if (tsec_free) | |
1295 | free (tsec_free); | |
1296 | return 0; | |
1297 | } | |
1298 | if (tsec_free) | |
1299 | free (tsec_free); | |
1300 | } | |
1301 | ||
fe8bc63d | 1302 | /* We've now determined that we can skip an initial gp load. Verify |
252b5132 RH |
1303 | that the call and the target use the same gp. */ |
1304 | if (info->link_info->hash->creator != info->tsec->owner->xvec | |
1305 | || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) | |
1306 | return 0; | |
1307 | ||
1308 | return symval + 8; | |
1309 | } | |
1310 | ||
1311 | static boolean | |
1312 | elf64_alpha_relax_without_lituse (info, symval, irel) | |
1313 | struct alpha_relax_info *info; | |
1314 | bfd_vma symval; | |
1315 | Elf_Internal_Rela *irel; | |
1316 | { | |
1317 | unsigned int insn; | |
1318 | bfd_signed_vma disp; | |
1319 | ||
1320 | /* Get the instruction. */ | |
1321 | insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); | |
1322 | ||
1323 | if (insn >> 26 != OP_LDQ) | |
1324 | { | |
1325 | ((*_bfd_error_handler) | |
1326 | ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn", | |
8f615d07 | 1327 | bfd_archive_filename (info->abfd), info->sec->name, |
252b5132 RH |
1328 | (unsigned long) irel->r_offset)); |
1329 | return true; | |
1330 | } | |
1331 | ||
1332 | /* So we aren't told much. Do what we can with the address load and | |
1333 | fake the rest. All of the optimizations here require that the | |
1334 | offset from the GP fit in 16 bits. */ | |
1335 | ||
1336 | disp = symval - info->gp; | |
1337 | if (disp < -0x8000 || disp >= 0x8000) | |
1338 | return true; | |
1339 | ||
1340 | /* On the LITERAL instruction itself, consider exchanging | |
1341 | `ldq R,X(gp)' for `lda R,Y(gp)'. */ | |
1342 | ||
1343 | insn = (OP_LDA << 26) | (insn & 0x03ff0000); | |
dc810e39 | 1344 | bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); |
252b5132 RH |
1345 | info->changed_contents = true; |
1346 | ||
dfe57ca0 | 1347 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), R_ALPHA_GPREL16); |
252b5132 RH |
1348 | info->changed_relocs = true; |
1349 | ||
1350 | /* Reduce the use count on this got entry by one, possibly | |
1351 | eliminating it. */ | |
1352 | info->gotent->use_count -= 1; | |
1353 | alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1; | |
1354 | if (!info->h) | |
1355 | alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1; | |
1356 | ||
1357 | /* ??? Search forward through this basic block looking for insns | |
1358 | that use the target register. Stop after an insn modifying the | |
1359 | register is seen, or after a branch or call. | |
1360 | ||
1361 | Any such memory load insn may be substituted by a load directly | |
1362 | off the GP. This allows the memory load insn to be issued before | |
fe8bc63d | 1363 | the calculated GP register would otherwise be ready. |
252b5132 RH |
1364 | |
1365 | Any such jsr insn can be replaced by a bsr if it is in range. | |
1366 | ||
1367 | This would mean that we'd have to _add_ relocations, the pain of | |
1368 | which gives one pause. */ | |
1369 | ||
1370 | return true; | |
1371 | } | |
1372 | ||
1373 | static boolean | |
1374 | elf64_alpha_relax_section (abfd, sec, link_info, again) | |
1375 | bfd *abfd; | |
1376 | asection *sec; | |
1377 | struct bfd_link_info *link_info; | |
1378 | boolean *again; | |
1379 | { | |
1380 | Elf_Internal_Shdr *symtab_hdr; | |
9ad5cbcf | 1381 | Elf_Internal_Shdr *shndx_hdr; |
252b5132 RH |
1382 | Elf_Internal_Rela *internal_relocs; |
1383 | Elf_Internal_Rela *free_relocs = NULL; | |
1384 | Elf_Internal_Rela *irel, *irelend; | |
1385 | bfd_byte *free_contents = NULL; | |
1386 | Elf64_External_Sym *extsyms = NULL; | |
1387 | Elf64_External_Sym *free_extsyms = NULL; | |
9ad5cbcf | 1388 | Elf_External_Sym_Shndx *shndx_buf = NULL; |
252b5132 RH |
1389 | struct alpha_elf_got_entry **local_got_entries; |
1390 | struct alpha_relax_info info; | |
1391 | ||
1392 | /* We are not currently changing any sizes, so only one pass. */ | |
1393 | *again = false; | |
1394 | ||
1395 | if (link_info->relocateable | |
1396 | || (sec->flags & SEC_RELOC) == 0 | |
1397 | || sec->reloc_count == 0) | |
1398 | return true; | |
1399 | ||
1400 | /* If this is the first time we have been called for this section, | |
1401 | initialize the cooked size. */ | |
1402 | if (sec->_cooked_size == 0) | |
1403 | sec->_cooked_size = sec->_raw_size; | |
1404 | ||
1405 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1406 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; | |
1407 | ||
1408 | /* Load the relocations for this section. */ | |
1409 | internal_relocs = (_bfd_elf64_link_read_relocs | |
1410 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
1411 | link_info->keep_memory)); | |
1412 | if (internal_relocs == NULL) | |
1413 | goto error_return; | |
1414 | if (! link_info->keep_memory) | |
1415 | free_relocs = internal_relocs; | |
1416 | ||
fe8bc63d | 1417 | memset(&info, 0, sizeof (info)); |
252b5132 RH |
1418 | info.abfd = abfd; |
1419 | info.sec = sec; | |
1420 | info.link_info = link_info; | |
1421 | info.relocs = internal_relocs; | |
1422 | info.relend = irelend = internal_relocs + sec->reloc_count; | |
1423 | ||
1424 | /* Find the GP for this object. */ | |
1425 | info.gotobj = alpha_elf_tdata (abfd)->gotobj; | |
1426 | if (info.gotobj) | |
1427 | { | |
1428 | asection *sgot = alpha_elf_tdata (info.gotobj)->got; | |
1429 | info.gp = _bfd_get_gp_value (info.gotobj); | |
1430 | if (info.gp == 0) | |
1431 | { | |
1432 | info.gp = (sgot->output_section->vma | |
1433 | + sgot->output_offset | |
1434 | + 0x8000); | |
1435 | _bfd_set_gp_value (info.gotobj, info.gp); | |
1436 | } | |
1437 | } | |
1438 | ||
1439 | for (irel = internal_relocs; irel < irelend; irel++) | |
1440 | { | |
1441 | bfd_vma symval; | |
1442 | Elf_Internal_Sym isym; | |
1443 | struct alpha_elf_got_entry *gotent; | |
1444 | ||
1445 | if (ELF64_R_TYPE (irel->r_info) != (int) R_ALPHA_LITERAL) | |
1446 | continue; | |
1447 | ||
1448 | /* Get the section contents. */ | |
1449 | if (info.contents == NULL) | |
1450 | { | |
1451 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1452 | info.contents = elf_section_data (sec)->this_hdr.contents; | |
1453 | else | |
1454 | { | |
1455 | info.contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
1456 | if (info.contents == NULL) | |
1457 | goto error_return; | |
1458 | free_contents = info.contents; | |
1459 | ||
1460 | if (! bfd_get_section_contents (abfd, sec, info.contents, | |
1461 | (file_ptr) 0, sec->_raw_size)) | |
1462 | goto error_return; | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | /* Read this BFD's symbols if we haven't done so already. */ | |
1467 | if (extsyms == NULL) | |
1468 | { | |
9ad5cbcf AM |
1469 | bfd_size_type amt; |
1470 | ||
252b5132 RH |
1471 | if (symtab_hdr->contents != NULL) |
1472 | extsyms = (Elf64_External_Sym *) symtab_hdr->contents; | |
1473 | else | |
1474 | { | |
9ad5cbcf AM |
1475 | amt = symtab_hdr->sh_info; |
1476 | amt *= sizeof (Elf64_External_Sym); | |
1477 | extsyms = (Elf64_External_Sym *) bfd_malloc (amt); | |
252b5132 RH |
1478 | if (extsyms == NULL) |
1479 | goto error_return; | |
1480 | free_extsyms = extsyms; | |
1481 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
9ad5cbcf AM |
1482 | || bfd_bread ((PTR) extsyms, amt, abfd) != amt) |
1483 | goto error_return; | |
1484 | } | |
1485 | ||
1486 | shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; | |
1487 | if (shndx_hdr->sh_size != 0) | |
1488 | { | |
1489 | amt = symtab_hdr->sh_info; | |
1490 | amt *= sizeof (Elf_External_Sym_Shndx); | |
1491 | shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
1492 | if (shndx_buf == NULL) | |
1493 | goto error_return; | |
1494 | if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 | |
1495 | || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt) | |
252b5132 RH |
1496 | goto error_return; |
1497 | } | |
1498 | } | |
1499 | ||
1500 | /* Get the value of the symbol referred to by the reloc. */ | |
1501 | if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1502 | { | |
1503 | /* A local symbol. */ | |
9ad5cbcf AM |
1504 | Elf64_External_Sym *esym; |
1505 | Elf_External_Sym_Shndx *shndx; | |
1506 | ||
1507 | esym = extsyms + ELF64_R_SYM (irel->r_info); | |
1508 | shndx = shndx_buf + (shndx_buf ? ELF64_R_SYM (irel->r_info) : 0); | |
1509 | bfd_elf64_swap_symbol_in (abfd, esym, shndx, &isym); | |
252b5132 RH |
1510 | if (isym.st_shndx == SHN_UNDEF) |
1511 | info.tsec = bfd_und_section_ptr; | |
252b5132 RH |
1512 | else if (isym.st_shndx == SHN_ABS) |
1513 | info.tsec = bfd_abs_section_ptr; | |
1514 | else if (isym.st_shndx == SHN_COMMON) | |
1515 | info.tsec = bfd_com_section_ptr; | |
fe8bc63d | 1516 | else |
9ad5cbcf | 1517 | info.tsec = bfd_section_from_elf_index (abfd, isym.st_shndx); |
252b5132 RH |
1518 | |
1519 | info.h = NULL; | |
1520 | info.other = isym.st_other; | |
1521 | gotent = local_got_entries[ELF64_R_SYM(irel->r_info)]; | |
1522 | symval = isym.st_value; | |
1523 | } | |
1524 | else | |
1525 | { | |
1526 | unsigned long indx; | |
1527 | struct alpha_elf_link_hash_entry *h; | |
1528 | ||
1529 | indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1530 | h = alpha_elf_sym_hashes (abfd)[indx]; | |
1531 | BFD_ASSERT (h != NULL); | |
1532 | ||
1533 | while (h->root.root.type == bfd_link_hash_indirect | |
1534 | || h->root.root.type == bfd_link_hash_warning) | |
1535 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
1536 | ||
1537 | /* We can't do anthing with undefined or dynamic symbols. */ | |
1538 | if (h->root.root.type == bfd_link_hash_undefined | |
1539 | || h->root.root.type == bfd_link_hash_undefweak | |
1540 | || alpha_elf_dynamic_symbol_p (&h->root, link_info)) | |
1541 | continue; | |
1542 | ||
1543 | info.h = h; | |
252b5132 RH |
1544 | info.tsec = h->root.root.u.def.section; |
1545 | info.other = h->root.other; | |
1546 | gotent = h->got_entries; | |
1547 | symval = h->root.root.u.def.value; | |
1548 | } | |
1549 | ||
1550 | /* Search for the got entry to be used by this relocation. */ | |
1551 | while (gotent->gotobj != info.gotobj || gotent->addend != irel->r_addend) | |
1552 | gotent = gotent->next; | |
1553 | info.gotent = gotent; | |
1554 | ||
1555 | symval += info.tsec->output_section->vma + info.tsec->output_offset; | |
1556 | symval += irel->r_addend; | |
1557 | ||
1558 | BFD_ASSERT(info.gotent != NULL); | |
1559 | ||
1560 | /* If there exist LITUSE relocations immediately following, this | |
1561 | opens up all sorts of interesting optimizations, because we | |
1562 | now know every location that this address load is used. */ | |
1563 | ||
1564 | if (irel+1 < irelend && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE) | |
1565 | { | |
1566 | irel = elf64_alpha_relax_with_lituse (&info, symval, irel, irelend); | |
1567 | if (irel == NULL) | |
1568 | goto error_return; | |
1569 | } | |
1570 | else | |
1571 | { | |
1572 | if (!elf64_alpha_relax_without_lituse (&info, symval, irel)) | |
1573 | goto error_return; | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | if (!elf64_alpha_size_got_sections (abfd, link_info)) | |
1578 | return false; | |
1579 | ||
1580 | if (info.changed_relocs) | |
1581 | { | |
1582 | elf_section_data (sec)->relocs = internal_relocs; | |
1583 | } | |
1584 | else if (free_relocs != NULL) | |
1585 | { | |
1586 | free (free_relocs); | |
1587 | } | |
1588 | ||
1589 | if (info.changed_contents) | |
1590 | { | |
1591 | elf_section_data (sec)->this_hdr.contents = info.contents; | |
1592 | } | |
1593 | else if (free_contents != NULL) | |
1594 | { | |
1595 | if (! link_info->keep_memory) | |
1596 | free (free_contents); | |
1597 | else | |
1598 | { | |
1599 | /* Cache the section contents for elf_link_input_bfd. */ | |
1600 | elf_section_data (sec)->this_hdr.contents = info.contents; | |
1601 | } | |
1602 | } | |
1603 | ||
9ad5cbcf AM |
1604 | if (shndx_buf != NULL) |
1605 | free (shndx_buf); | |
1606 | ||
252b5132 RH |
1607 | if (free_extsyms != NULL) |
1608 | { | |
1609 | if (! link_info->keep_memory) | |
1610 | free (free_extsyms); | |
1611 | else | |
1612 | { | |
1613 | /* Cache the symbols for elf_link_input_bfd. */ | |
973ffd63 | 1614 | symtab_hdr->contents = (unsigned char *) extsyms; |
252b5132 RH |
1615 | } |
1616 | } | |
1617 | ||
1618 | *again = info.changed_contents || info.changed_relocs; | |
1619 | ||
1620 | return true; | |
1621 | ||
1622 | error_return: | |
1623 | if (free_relocs != NULL) | |
1624 | free (free_relocs); | |
1625 | if (free_contents != NULL) | |
1626 | free (free_contents); | |
9ad5cbcf AM |
1627 | if (shndx_buf != NULL) |
1628 | free (shndx_buf); | |
252b5132 RH |
1629 | if (free_extsyms != NULL) |
1630 | free (free_extsyms); | |
1631 | return false; | |
1632 | } | |
1633 | \f | |
1634 | /* PLT/GOT Stuff */ | |
1635 | #define PLT_HEADER_SIZE 32 | |
dc810e39 AM |
1636 | #define PLT_HEADER_WORD1 (bfd_vma) 0xc3600000 /* br $27,.+4 */ |
1637 | #define PLT_HEADER_WORD2 (bfd_vma) 0xa77b000c /* ldq $27,12($27) */ | |
1638 | #define PLT_HEADER_WORD3 (bfd_vma) 0x47ff041f /* nop */ | |
1639 | #define PLT_HEADER_WORD4 (bfd_vma) 0x6b7b0000 /* jmp $27,($27) */ | |
252b5132 RH |
1640 | |
1641 | #define PLT_ENTRY_SIZE 12 | |
1642 | #define PLT_ENTRY_WORD1 0xc3800000 /* br $28, plt0 */ | |
1643 | #define PLT_ENTRY_WORD2 0 | |
1644 | #define PLT_ENTRY_WORD3 0 | |
1645 | ||
1646 | #define MAX_GOT_ENTRIES (64*1024 / 8) | |
1647 | ||
1648 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" | |
1649 | \f | |
1650 | /* Handle an Alpha specific section when reading an object file. This | |
1651 | is called when elfcode.h finds a section with an unknown type. | |
1652 | FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure | |
1653 | how to. */ | |
1654 | ||
1655 | static boolean | |
1656 | elf64_alpha_section_from_shdr (abfd, hdr, name) | |
1657 | bfd *abfd; | |
1658 | Elf64_Internal_Shdr *hdr; | |
1659 | char *name; | |
1660 | { | |
1661 | asection *newsect; | |
1662 | ||
1663 | /* There ought to be a place to keep ELF backend specific flags, but | |
1664 | at the moment there isn't one. We just keep track of the | |
1665 | sections by their name, instead. Fortunately, the ABI gives | |
1666 | suggested names for all the MIPS specific sections, so we will | |
1667 | probably get away with this. */ | |
1668 | switch (hdr->sh_type) | |
1669 | { | |
1670 | case SHT_ALPHA_DEBUG: | |
1671 | if (strcmp (name, ".mdebug") != 0) | |
1672 | return false; | |
1673 | break; | |
252b5132 RH |
1674 | default: |
1675 | return false; | |
1676 | } | |
1677 | ||
1678 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) | |
1679 | return false; | |
1680 | newsect = hdr->bfd_section; | |
1681 | ||
1682 | if (hdr->sh_type == SHT_ALPHA_DEBUG) | |
1683 | { | |
1684 | if (! bfd_set_section_flags (abfd, newsect, | |
1685 | (bfd_get_section_flags (abfd, newsect) | |
1686 | | SEC_DEBUGGING))) | |
1687 | return false; | |
1688 | } | |
1689 | ||
252b5132 RH |
1690 | return true; |
1691 | } | |
1692 | ||
204692d7 RH |
1693 | /* Convert Alpha specific section flags to bfd internal section flags. */ |
1694 | ||
1695 | static boolean | |
1696 | elf64_alpha_section_flags (flags, hdr) | |
1697 | flagword *flags; | |
1698 | Elf64_Internal_Shdr *hdr; | |
1699 | { | |
1700 | if (hdr->sh_flags & SHF_ALPHA_GPREL) | |
1701 | *flags |= SEC_SMALL_DATA; | |
1702 | ||
1703 | return true; | |
1704 | } | |
1705 | ||
252b5132 RH |
1706 | /* Set the correct type for an Alpha ELF section. We do this by the |
1707 | section name, which is a hack, but ought to work. */ | |
1708 | ||
1709 | static boolean | |
1710 | elf64_alpha_fake_sections (abfd, hdr, sec) | |
1711 | bfd *abfd; | |
1712 | Elf64_Internal_Shdr *hdr; | |
1713 | asection *sec; | |
1714 | { | |
1715 | register const char *name; | |
1716 | ||
1717 | name = bfd_get_section_name (abfd, sec); | |
1718 | ||
1719 | if (strcmp (name, ".mdebug") == 0) | |
1720 | { | |
1721 | hdr->sh_type = SHT_ALPHA_DEBUG; | |
1722 | /* In a shared object on Irix 5.3, the .mdebug section has an | |
1723 | entsize of 0. FIXME: Does this matter? */ | |
1724 | if ((abfd->flags & DYNAMIC) != 0 ) | |
1725 | hdr->sh_entsize = 0; | |
1726 | else | |
1727 | hdr->sh_entsize = 1; | |
1728 | } | |
204692d7 RH |
1729 | else if ((sec->flags & SEC_SMALL_DATA) |
1730 | || strcmp (name, ".sdata") == 0 | |
252b5132 RH |
1731 | || strcmp (name, ".sbss") == 0 |
1732 | || strcmp (name, ".lit4") == 0 | |
1733 | || strcmp (name, ".lit8") == 0) | |
1734 | hdr->sh_flags |= SHF_ALPHA_GPREL; | |
1735 | ||
1736 | return true; | |
1737 | } | |
1738 | ||
1739 | /* Hook called by the linker routine which adds symbols from an object | |
1740 | file. We use it to put .comm items in .sbss, and not .bss. */ | |
1741 | ||
1742 | static boolean | |
1743 | elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) | |
1744 | bfd *abfd; | |
1745 | struct bfd_link_info *info; | |
1746 | const Elf_Internal_Sym *sym; | |
56fc028e AJ |
1747 | const char **namep ATTRIBUTE_UNUSED; |
1748 | flagword *flagsp ATTRIBUTE_UNUSED; | |
252b5132 RH |
1749 | asection **secp; |
1750 | bfd_vma *valp; | |
1751 | { | |
1752 | if (sym->st_shndx == SHN_COMMON | |
1753 | && !info->relocateable | |
c0846b23 | 1754 | && sym->st_size <= elf_gp_size (abfd)) |
252b5132 RH |
1755 | { |
1756 | /* Common symbols less than or equal to -G nn bytes are | |
1757 | automatically put into .sbss. */ | |
1758 | ||
1759 | asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); | |
1760 | ||
1761 | if (scomm == NULL) | |
1762 | { | |
1763 | scomm = bfd_make_section (abfd, ".scommon"); | |
1764 | if (scomm == NULL | |
1765 | || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC | |
1766 | | SEC_IS_COMMON | |
1767 | | SEC_LINKER_CREATED))) | |
1768 | return false; | |
1769 | } | |
1770 | ||
1771 | *secp = scomm; | |
1772 | *valp = sym->st_size; | |
1773 | } | |
1774 | ||
1775 | return true; | |
1776 | } | |
1777 | ||
1778 | /* Create the .got section. */ | |
1779 | ||
1780 | static boolean | |
1781 | elf64_alpha_create_got_section(abfd, info) | |
1782 | bfd *abfd; | |
56fc028e | 1783 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
1784 | { |
1785 | asection *s; | |
1786 | ||
1787 | if (bfd_get_section_by_name (abfd, ".got")) | |
1788 | return true; | |
1789 | ||
1790 | s = bfd_make_section (abfd, ".got"); | |
1791 | if (s == NULL | |
1792 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD | |
1793 | | SEC_HAS_CONTENTS | |
1794 | | SEC_IN_MEMORY | |
1795 | | SEC_LINKER_CREATED)) | |
1796 | || !bfd_set_section_alignment (abfd, s, 3)) | |
1797 | return false; | |
1798 | ||
1799 | alpha_elf_tdata (abfd)->got = s; | |
1800 | ||
1801 | return true; | |
1802 | } | |
1803 | ||
1804 | /* Create all the dynamic sections. */ | |
1805 | ||
1806 | static boolean | |
1807 | elf64_alpha_create_dynamic_sections (abfd, info) | |
1808 | bfd *abfd; | |
1809 | struct bfd_link_info *info; | |
1810 | { | |
1811 | asection *s; | |
1812 | struct elf_link_hash_entry *h; | |
1813 | ||
1814 | /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ | |
1815 | ||
1816 | s = bfd_make_section (abfd, ".plt"); | |
1817 | if (s == NULL | |
1818 | || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD | |
1819 | | SEC_HAS_CONTENTS | |
1820 | | SEC_IN_MEMORY | |
1821 | | SEC_LINKER_CREATED | |
1822 | | SEC_CODE)) | |
1823 | || ! bfd_set_section_alignment (abfd, s, 3)) | |
1824 | return false; | |
1825 | ||
1826 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the | |
1827 | .plt section. */ | |
1828 | h = NULL; | |
1829 | if (! (_bfd_generic_link_add_one_symbol | |
1830 | (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, | |
1831 | (bfd_vma) 0, (const char *) NULL, false, | |
1832 | get_elf_backend_data (abfd)->collect, | |
1833 | (struct bfd_link_hash_entry **) &h))) | |
1834 | return false; | |
1835 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
1836 | h->type = STT_OBJECT; | |
1837 | ||
1838 | if (info->shared | |
1839 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1840 | return false; | |
1841 | ||
1842 | s = bfd_make_section (abfd, ".rela.plt"); | |
1843 | if (s == NULL | |
1844 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD | |
1845 | | SEC_HAS_CONTENTS | |
1846 | | SEC_IN_MEMORY | |
1847 | | SEC_LINKER_CREATED | |
1848 | | SEC_READONLY)) | |
1849 | || ! bfd_set_section_alignment (abfd, s, 3)) | |
1850 | return false; | |
1851 | ||
1852 | /* We may or may not have created a .got section for this object, but | |
1853 | we definitely havn't done the rest of the work. */ | |
1854 | ||
1855 | if (!elf64_alpha_create_got_section (abfd, info)) | |
1856 | return false; | |
1857 | ||
1858 | s = bfd_make_section(abfd, ".rela.got"); | |
1859 | if (s == NULL | |
1860 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD | |
1861 | | SEC_HAS_CONTENTS | |
1862 | | SEC_IN_MEMORY | |
1863 | | SEC_LINKER_CREATED | |
1864 | | SEC_READONLY)) | |
1865 | || !bfd_set_section_alignment (abfd, s, 3)) | |
1866 | return false; | |
1867 | ||
1868 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the | |
1869 | dynobj's .got section. We don't do this in the linker script | |
1870 | because we don't want to define the symbol if we are not creating | |
1871 | a global offset table. */ | |
1872 | h = NULL; | |
1873 | if (!(_bfd_generic_link_add_one_symbol | |
1874 | (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, | |
1875 | alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL, | |
1876 | false, get_elf_backend_data (abfd)->collect, | |
1877 | (struct bfd_link_hash_entry **) &h))) | |
1878 | return false; | |
1879 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
1880 | h->type = STT_OBJECT; | |
1881 | ||
1882 | if (info->shared | |
1883 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1884 | return false; | |
1885 | ||
1886 | elf_hash_table (info)->hgot = h; | |
1887 | ||
1888 | return true; | |
1889 | } | |
1890 | \f | |
1891 | /* Read ECOFF debugging information from a .mdebug section into a | |
1892 | ecoff_debug_info structure. */ | |
1893 | ||
1894 | static boolean | |
1895 | elf64_alpha_read_ecoff_info (abfd, section, debug) | |
1896 | bfd *abfd; | |
1897 | asection *section; | |
1898 | struct ecoff_debug_info *debug; | |
1899 | { | |
1900 | HDRR *symhdr; | |
1901 | const struct ecoff_debug_swap *swap; | |
1902 | char *ext_hdr = NULL; | |
1903 | ||
1904 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
fe8bc63d | 1905 | memset (debug, 0, sizeof (*debug)); |
252b5132 | 1906 | |
dc810e39 | 1907 | ext_hdr = (char *) bfd_malloc (swap->external_hdr_size); |
252b5132 RH |
1908 | if (ext_hdr == NULL && swap->external_hdr_size != 0) |
1909 | goto error_return; | |
1910 | ||
1911 | if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, | |
1912 | swap->external_hdr_size) | |
1913 | == false) | |
1914 | goto error_return; | |
1915 | ||
1916 | symhdr = &debug->symbolic_header; | |
1917 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); | |
1918 | ||
1919 | /* The symbolic header contains absolute file offsets and sizes to | |
1920 | read. */ | |
1921 | #define READ(ptr, offset, count, size, type) \ | |
1922 | if (symhdr->count == 0) \ | |
1923 | debug->ptr = NULL; \ | |
1924 | else \ | |
1925 | { \ | |
dc810e39 AM |
1926 | bfd_size_type amt = (bfd_size_type) size * symhdr->count; \ |
1927 | debug->ptr = (type) bfd_malloc (amt); \ | |
252b5132 RH |
1928 | if (debug->ptr == NULL) \ |
1929 | goto error_return; \ | |
1930 | if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ | |
dc810e39 | 1931 | || bfd_bread (debug->ptr, amt, abfd) != amt) \ |
252b5132 RH |
1932 | goto error_return; \ |
1933 | } | |
1934 | ||
1935 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); | |
1936 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR); | |
1937 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR); | |
1938 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR); | |
1939 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR); | |
1940 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), | |
1941 | union aux_ext *); | |
1942 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); | |
1943 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); | |
1944 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR); | |
1945 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR); | |
1946 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR); | |
1947 | #undef READ | |
1948 | ||
1949 | debug->fdr = NULL; | |
1950 | debug->adjust = NULL; | |
1951 | ||
1952 | return true; | |
1953 | ||
1954 | error_return: | |
1955 | if (ext_hdr != NULL) | |
1956 | free (ext_hdr); | |
1957 | if (debug->line != NULL) | |
1958 | free (debug->line); | |
1959 | if (debug->external_dnr != NULL) | |
1960 | free (debug->external_dnr); | |
1961 | if (debug->external_pdr != NULL) | |
1962 | free (debug->external_pdr); | |
1963 | if (debug->external_sym != NULL) | |
1964 | free (debug->external_sym); | |
1965 | if (debug->external_opt != NULL) | |
1966 | free (debug->external_opt); | |
1967 | if (debug->external_aux != NULL) | |
1968 | free (debug->external_aux); | |
1969 | if (debug->ss != NULL) | |
1970 | free (debug->ss); | |
1971 | if (debug->ssext != NULL) | |
1972 | free (debug->ssext); | |
1973 | if (debug->external_fdr != NULL) | |
1974 | free (debug->external_fdr); | |
1975 | if (debug->external_rfd != NULL) | |
1976 | free (debug->external_rfd); | |
1977 | if (debug->external_ext != NULL) | |
1978 | free (debug->external_ext); | |
1979 | return false; | |
1980 | } | |
1981 | ||
1982 | /* Alpha ELF local labels start with '$'. */ | |
1983 | ||
1984 | static boolean | |
1985 | elf64_alpha_is_local_label_name (abfd, name) | |
56fc028e | 1986 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1987 | const char *name; |
1988 | { | |
1989 | return name[0] == '$'; | |
1990 | } | |
1991 | ||
1992 | /* Alpha ELF follows MIPS ELF in using a special find_nearest_line | |
1993 | routine in order to handle the ECOFF debugging information. We | |
1994 | still call this mips_elf_find_line because of the slot | |
1995 | find_line_info in elf_obj_tdata is declared that way. */ | |
1996 | ||
1997 | struct mips_elf_find_line | |
1998 | { | |
1999 | struct ecoff_debug_info d; | |
2000 | struct ecoff_find_line i; | |
2001 | }; | |
2002 | ||
2003 | static boolean | |
2004 | elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr, | |
2005 | functionname_ptr, line_ptr) | |
2006 | bfd *abfd; | |
2007 | asection *section; | |
2008 | asymbol **symbols; | |
2009 | bfd_vma offset; | |
2010 | const char **filename_ptr; | |
2011 | const char **functionname_ptr; | |
2012 | unsigned int *line_ptr; | |
2013 | { | |
2014 | asection *msec; | |
2015 | ||
95404643 RH |
2016 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
2017 | filename_ptr, functionname_ptr, | |
2018 | line_ptr, 0, | |
2019 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
2020 | return true; | |
2021 | ||
252b5132 RH |
2022 | msec = bfd_get_section_by_name (abfd, ".mdebug"); |
2023 | if (msec != NULL) | |
2024 | { | |
2025 | flagword origflags; | |
2026 | struct mips_elf_find_line *fi; | |
2027 | const struct ecoff_debug_swap * const swap = | |
2028 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
2029 | ||
2030 | /* If we are called during a link, alpha_elf_final_link may have | |
2031 | cleared the SEC_HAS_CONTENTS field. We force it back on here | |
2032 | if appropriate (which it normally will be). */ | |
2033 | origflags = msec->flags; | |
2034 | if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) | |
2035 | msec->flags |= SEC_HAS_CONTENTS; | |
2036 | ||
2037 | fi = elf_tdata (abfd)->find_line_info; | |
2038 | if (fi == NULL) | |
2039 | { | |
2040 | bfd_size_type external_fdr_size; | |
2041 | char *fraw_src; | |
2042 | char *fraw_end; | |
2043 | struct fdr *fdr_ptr; | |
dc810e39 | 2044 | bfd_size_type amt = sizeof (struct mips_elf_find_line); |
252b5132 | 2045 | |
dc810e39 | 2046 | fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt); |
252b5132 RH |
2047 | if (fi == NULL) |
2048 | { | |
2049 | msec->flags = origflags; | |
2050 | return false; | |
2051 | } | |
2052 | ||
2053 | if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) | |
2054 | { | |
2055 | msec->flags = origflags; | |
2056 | return false; | |
2057 | } | |
2058 | ||
2059 | /* Swap in the FDR information. */ | |
dc810e39 AM |
2060 | amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr); |
2061 | fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt); | |
252b5132 RH |
2062 | if (fi->d.fdr == NULL) |
2063 | { | |
2064 | msec->flags = origflags; | |
2065 | return false; | |
2066 | } | |
2067 | external_fdr_size = swap->external_fdr_size; | |
2068 | fdr_ptr = fi->d.fdr; | |
2069 | fraw_src = (char *) fi->d.external_fdr; | |
2070 | fraw_end = (fraw_src | |
2071 | + fi->d.symbolic_header.ifdMax * external_fdr_size); | |
2072 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) | |
2073 | (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr); | |
2074 | ||
2075 | elf_tdata (abfd)->find_line_info = fi; | |
2076 | ||
2077 | /* Note that we don't bother to ever free this information. | |
2078 | find_nearest_line is either called all the time, as in | |
2079 | objdump -l, so the information should be saved, or it is | |
2080 | rarely called, as in ld error messages, so the memory | |
2081 | wasted is unimportant. Still, it would probably be a | |
2082 | good idea for free_cached_info to throw it away. */ | |
2083 | } | |
2084 | ||
2085 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, | |
2086 | &fi->i, filename_ptr, functionname_ptr, | |
2087 | line_ptr)) | |
2088 | { | |
2089 | msec->flags = origflags; | |
2090 | return true; | |
2091 | } | |
2092 | ||
2093 | msec->flags = origflags; | |
2094 | } | |
2095 | ||
2096 | /* Fall back on the generic ELF find_nearest_line routine. */ | |
2097 | ||
2098 | return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, | |
2099 | filename_ptr, functionname_ptr, | |
2100 | line_ptr); | |
2101 | } | |
2102 | \f | |
2103 | /* Structure used to pass information to alpha_elf_output_extsym. */ | |
2104 | ||
2105 | struct extsym_info | |
2106 | { | |
2107 | bfd *abfd; | |
2108 | struct bfd_link_info *info; | |
2109 | struct ecoff_debug_info *debug; | |
2110 | const struct ecoff_debug_swap *swap; | |
2111 | boolean failed; | |
2112 | }; | |
2113 | ||
2114 | static boolean | |
2115 | elf64_alpha_output_extsym (h, data) | |
2116 | struct alpha_elf_link_hash_entry *h; | |
2117 | PTR data; | |
2118 | { | |
2119 | struct extsym_info *einfo = (struct extsym_info *) data; | |
2120 | boolean strip; | |
2121 | asection *sec, *output_section; | |
2122 | ||
e92d460e AM |
2123 | if (h->root.root.type == bfd_link_hash_warning) |
2124 | h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; | |
2125 | ||
252b5132 RH |
2126 | if (h->root.indx == -2) |
2127 | strip = false; | |
2128 | else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
e92d460e AM |
2129 | || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) |
2130 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
2131 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
252b5132 RH |
2132 | strip = true; |
2133 | else if (einfo->info->strip == strip_all | |
e92d460e AM |
2134 | || (einfo->info->strip == strip_some |
2135 | && bfd_hash_lookup (einfo->info->keep_hash, | |
2136 | h->root.root.root.string, | |
2137 | false, false) == NULL)) | |
252b5132 RH |
2138 | strip = true; |
2139 | else | |
2140 | strip = false; | |
2141 | ||
2142 | if (strip) | |
2143 | return true; | |
2144 | ||
2145 | if (h->esym.ifd == -2) | |
2146 | { | |
2147 | h->esym.jmptbl = 0; | |
2148 | h->esym.cobol_main = 0; | |
2149 | h->esym.weakext = 0; | |
2150 | h->esym.reserved = 0; | |
2151 | h->esym.ifd = ifdNil; | |
2152 | h->esym.asym.value = 0; | |
2153 | h->esym.asym.st = stGlobal; | |
2154 | ||
2155 | if (h->root.root.type != bfd_link_hash_defined | |
e92d460e AM |
2156 | && h->root.root.type != bfd_link_hash_defweak) |
2157 | h->esym.asym.sc = scAbs; | |
252b5132 | 2158 | else |
e92d460e AM |
2159 | { |
2160 | const char *name; | |
2161 | ||
2162 | sec = h->root.root.u.def.section; | |
2163 | output_section = sec->output_section; | |
2164 | ||
2165 | /* When making a shared library and symbol h is the one from | |
2166 | the another shared library, OUTPUT_SECTION may be null. */ | |
2167 | if (output_section == NULL) | |
2168 | h->esym.asym.sc = scUndefined; | |
2169 | else | |
2170 | { | |
2171 | name = bfd_section_name (output_section->owner, output_section); | |
2172 | ||
2173 | if (strcmp (name, ".text") == 0) | |
2174 | h->esym.asym.sc = scText; | |
2175 | else if (strcmp (name, ".data") == 0) | |
2176 | h->esym.asym.sc = scData; | |
2177 | else if (strcmp (name, ".sdata") == 0) | |
2178 | h->esym.asym.sc = scSData; | |
2179 | else if (strcmp (name, ".rodata") == 0 | |
2180 | || strcmp (name, ".rdata") == 0) | |
2181 | h->esym.asym.sc = scRData; | |
2182 | else if (strcmp (name, ".bss") == 0) | |
2183 | h->esym.asym.sc = scBss; | |
2184 | else if (strcmp (name, ".sbss") == 0) | |
2185 | h->esym.asym.sc = scSBss; | |
2186 | else if (strcmp (name, ".init") == 0) | |
2187 | h->esym.asym.sc = scInit; | |
2188 | else if (strcmp (name, ".fini") == 0) | |
2189 | h->esym.asym.sc = scFini; | |
2190 | else | |
2191 | h->esym.asym.sc = scAbs; | |
2192 | } | |
2193 | } | |
252b5132 RH |
2194 | |
2195 | h->esym.asym.reserved = 0; | |
2196 | h->esym.asym.index = indexNil; | |
2197 | } | |
2198 | ||
2199 | if (h->root.root.type == bfd_link_hash_common) | |
2200 | h->esym.asym.value = h->root.root.u.c.size; | |
2201 | else if (h->root.root.type == bfd_link_hash_defined | |
2202 | || h->root.root.type == bfd_link_hash_defweak) | |
2203 | { | |
2204 | if (h->esym.asym.sc == scCommon) | |
e92d460e | 2205 | h->esym.asym.sc = scBss; |
252b5132 | 2206 | else if (h->esym.asym.sc == scSCommon) |
e92d460e | 2207 | h->esym.asym.sc = scSBss; |
252b5132 RH |
2208 | |
2209 | sec = h->root.root.u.def.section; | |
2210 | output_section = sec->output_section; | |
2211 | if (output_section != NULL) | |
e92d460e AM |
2212 | h->esym.asym.value = (h->root.root.u.def.value |
2213 | + sec->output_offset | |
2214 | + output_section->vma); | |
252b5132 | 2215 | else |
e92d460e | 2216 | h->esym.asym.value = 0; |
252b5132 RH |
2217 | } |
2218 | else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
2219 | { | |
2220 | /* Set type and value for a symbol with a function stub. */ | |
2221 | h->esym.asym.st = stProc; | |
2222 | sec = bfd_get_section_by_name (einfo->abfd, ".plt"); | |
2223 | if (sec == NULL) | |
2224 | h->esym.asym.value = 0; | |
2225 | else | |
2226 | { | |
2227 | output_section = sec->output_section; | |
2228 | if (output_section != NULL) | |
2229 | h->esym.asym.value = (h->root.plt.offset | |
2230 | + sec->output_offset | |
2231 | + output_section->vma); | |
2232 | else | |
2233 | h->esym.asym.value = 0; | |
2234 | } | |
252b5132 RH |
2235 | } |
2236 | ||
2237 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, | |
e92d460e AM |
2238 | h->root.root.root.string, |
2239 | &h->esym)) | |
252b5132 RH |
2240 | { |
2241 | einfo->failed = true; | |
2242 | return false; | |
2243 | } | |
2244 | ||
2245 | return true; | |
2246 | } | |
2247 | ||
2248 | /* FIXME: Create a runtime procedure table from the .mdebug section. | |
2249 | ||
2250 | static boolean | |
2251 | mips_elf_create_procedure_table (handle, abfd, info, s, debug) | |
2252 | PTR handle; | |
2253 | bfd *abfd; | |
2254 | struct bfd_link_info *info; | |
2255 | asection *s; | |
2256 | struct ecoff_debug_info *debug; | |
2257 | */ | |
2258 | \f | |
2259 | /* Handle dynamic relocations when doing an Alpha ELF link. */ | |
2260 | ||
2261 | static boolean | |
2262 | elf64_alpha_check_relocs (abfd, info, sec, relocs) | |
2263 | bfd *abfd; | |
2264 | struct bfd_link_info *info; | |
2265 | asection *sec; | |
2266 | const Elf_Internal_Rela *relocs; | |
2267 | { | |
2268 | bfd *dynobj; | |
2269 | asection *sreloc; | |
2270 | const char *rel_sec_name; | |
2271 | Elf_Internal_Shdr *symtab_hdr; | |
2272 | struct alpha_elf_link_hash_entry **sym_hashes; | |
2273 | struct alpha_elf_got_entry **local_got_entries; | |
2274 | const Elf_Internal_Rela *rel, *relend; | |
2275 | int got_created; | |
dc810e39 | 2276 | bfd_size_type amt; |
252b5132 RH |
2277 | |
2278 | if (info->relocateable) | |
2279 | return true; | |
2280 | ||
2281 | dynobj = elf_hash_table(info)->dynobj; | |
2282 | if (dynobj == NULL) | |
2283 | elf_hash_table(info)->dynobj = dynobj = abfd; | |
2284 | ||
2285 | sreloc = NULL; | |
2286 | rel_sec_name = NULL; | |
2287 | symtab_hdr = &elf_tdata(abfd)->symtab_hdr; | |
2288 | sym_hashes = alpha_elf_sym_hashes(abfd); | |
2289 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; | |
2290 | got_created = 0; | |
2291 | ||
2292 | relend = relocs + sec->reloc_count; | |
2293 | for (rel = relocs; rel < relend; ++rel) | |
2294 | { | |
2295 | unsigned long r_symndx, r_type; | |
2296 | struct alpha_elf_link_hash_entry *h; | |
2297 | ||
2298 | r_symndx = ELF64_R_SYM (rel->r_info); | |
2299 | if (r_symndx < symtab_hdr->sh_info) | |
2300 | h = NULL; | |
2301 | else | |
2302 | { | |
2303 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2304 | ||
2305 | while (h->root.root.type == bfd_link_hash_indirect | |
2306 | || h->root.root.type == bfd_link_hash_warning) | |
2307 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
2308 | ||
2309 | h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
2310 | } | |
2311 | r_type = ELF64_R_TYPE (rel->r_info); | |
2312 | ||
2313 | switch (r_type) | |
2314 | { | |
2315 | case R_ALPHA_LITERAL: | |
2316 | { | |
2317 | struct alpha_elf_got_entry *gotent; | |
2318 | int flags = 0; | |
2319 | ||
2320 | if (h) | |
2321 | { | |
2322 | /* Search for and possibly create a got entry. */ | |
2323 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) | |
2324 | if (gotent->gotobj == abfd && | |
2325 | gotent->addend == rel->r_addend) | |
2326 | break; | |
2327 | ||
2328 | if (!gotent) | |
2329 | { | |
dc810e39 | 2330 | amt = sizeof (struct alpha_elf_got_entry); |
252b5132 | 2331 | gotent = ((struct alpha_elf_got_entry *) |
dc810e39 | 2332 | bfd_alloc (abfd, amt)); |
252b5132 RH |
2333 | if (!gotent) |
2334 | return false; | |
2335 | ||
2336 | gotent->gotobj = abfd; | |
2337 | gotent->addend = rel->r_addend; | |
2338 | gotent->got_offset = -1; | |
2339 | gotent->flags = 0; | |
2340 | gotent->use_count = 1; | |
2341 | ||
2342 | gotent->next = h->got_entries; | |
2343 | h->got_entries = gotent; | |
2344 | ||
2345 | alpha_elf_tdata (abfd)->total_got_entries++; | |
2346 | } | |
2347 | else | |
2348 | gotent->use_count += 1; | |
2349 | } | |
2350 | else | |
2351 | { | |
2352 | /* This is a local .got entry -- record for merge. */ | |
2353 | if (!local_got_entries) | |
2354 | { | |
dc810e39 AM |
2355 | bfd_size_type size; |
2356 | size = symtab_hdr->sh_info; | |
2357 | size *= sizeof (struct alpha_elf_got_entry *); | |
252b5132 RH |
2358 | |
2359 | local_got_entries = ((struct alpha_elf_got_entry **) | |
2360 | bfd_alloc (abfd, size)); | |
2361 | if (!local_got_entries) | |
2362 | return false; | |
2363 | ||
dc810e39 | 2364 | memset (local_got_entries, 0, (size_t) size); |
252b5132 RH |
2365 | alpha_elf_tdata (abfd)->local_got_entries = |
2366 | local_got_entries; | |
2367 | } | |
2368 | ||
2369 | for (gotent = local_got_entries[ELF64_R_SYM(rel->r_info)]; | |
2370 | gotent != NULL && gotent->addend != rel->r_addend; | |
2371 | gotent = gotent->next) | |
2372 | continue; | |
2373 | if (!gotent) | |
2374 | { | |
dc810e39 | 2375 | amt = sizeof (struct alpha_elf_got_entry); |
252b5132 | 2376 | gotent = ((struct alpha_elf_got_entry *) |
dc810e39 | 2377 | bfd_alloc (abfd, amt)); |
252b5132 RH |
2378 | if (!gotent) |
2379 | return false; | |
2380 | ||
2381 | gotent->gotobj = abfd; | |
2382 | gotent->addend = rel->r_addend; | |
2383 | gotent->got_offset = -1; | |
2384 | gotent->flags = 0; | |
2385 | gotent->use_count = 1; | |
2386 | ||
2387 | gotent->next = local_got_entries[ELF64_R_SYM(rel->r_info)]; | |
2388 | local_got_entries[ELF64_R_SYM(rel->r_info)] = gotent; | |
2389 | ||
2390 | alpha_elf_tdata(abfd)->total_got_entries++; | |
2391 | alpha_elf_tdata(abfd)->n_local_got_entries++; | |
2392 | } | |
2393 | else | |
2394 | gotent->use_count += 1; | |
2395 | } | |
2396 | ||
2397 | /* Remember how this literal is used from its LITUSEs. | |
2398 | This will be important when it comes to decide if we can | |
2399 | create a .plt entry for a function symbol. */ | |
2400 | if (rel+1 < relend | |
2401 | && ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE) | |
2402 | { | |
2403 | do | |
2404 | { | |
2405 | ++rel; | |
2406 | if (rel->r_addend >= 1 && rel->r_addend <= 3) | |
2407 | flags |= 1 << rel->r_addend; | |
2408 | } | |
2409 | while (rel+1 < relend && | |
2410 | ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE); | |
2411 | } | |
2412 | else | |
2413 | { | |
2414 | /* No LITUSEs -- presumably the address is not being | |
2415 | loaded for nothing. */ | |
2416 | flags = ALPHA_ELF_LINK_HASH_LU_ADDR; | |
2417 | } | |
2418 | ||
2419 | gotent->flags |= flags; | |
2420 | if (h) | |
2421 | { | |
2422 | /* Make a guess as to whether a .plt entry will be needed. */ | |
2423 | if ((h->flags |= flags) == ALPHA_ELF_LINK_HASH_LU_FUNC) | |
2424 | h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
2425 | else | |
2426 | h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
2427 | } | |
2428 | } | |
2429 | /* FALLTHRU */ | |
2430 | ||
2431 | case R_ALPHA_GPDISP: | |
dfe57ca0 | 2432 | case R_ALPHA_GPREL16: |
252b5132 RH |
2433 | case R_ALPHA_GPREL32: |
2434 | case R_ALPHA_GPRELHIGH: | |
2435 | case R_ALPHA_GPRELLOW: | |
7793f4d0 | 2436 | case R_ALPHA_BRSGP: |
252b5132 RH |
2437 | /* We don't actually use the .got here, but the sections must |
2438 | be created before the linker maps input sections to output | |
2439 | sections. */ | |
2440 | if (!got_created) | |
2441 | { | |
2442 | if (!elf64_alpha_create_got_section (abfd, info)) | |
2443 | return false; | |
2444 | ||
2445 | /* Make sure the object's gotobj is set to itself so | |
2446 | that we default to every object with its own .got. | |
2447 | We'll merge .gots later once we've collected each | |
2448 | object's info. */ | |
2449 | alpha_elf_tdata(abfd)->gotobj = abfd; | |
2450 | ||
2451 | got_created = 1; | |
2452 | } | |
2453 | break; | |
2454 | ||
2455 | case R_ALPHA_SREL16: | |
2456 | case R_ALPHA_SREL32: | |
2457 | case R_ALPHA_SREL64: | |
2458 | if (h == NULL) | |
2459 | break; | |
2460 | /* FALLTHRU */ | |
2461 | ||
2462 | case R_ALPHA_REFLONG: | |
2463 | case R_ALPHA_REFQUAD: | |
2464 | if (rel_sec_name == NULL) | |
2465 | { | |
2466 | rel_sec_name = (bfd_elf_string_from_elf_section | |
2467 | (abfd, elf_elfheader(abfd)->e_shstrndx, | |
2468 | elf_section_data(sec)->rel_hdr.sh_name)); | |
2469 | if (rel_sec_name == NULL) | |
2470 | return false; | |
2471 | ||
2472 | BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0 | |
2473 | && strcmp (bfd_get_section_name (abfd, sec), | |
2474 | rel_sec_name+5) == 0); | |
2475 | } | |
2476 | ||
2477 | /* We need to create the section here now whether we eventually | |
2478 | use it or not so that it gets mapped to an output section by | |
2479 | the linker. If not used, we'll kill it in | |
2480 | size_dynamic_sections. */ | |
2481 | if (sreloc == NULL) | |
2482 | { | |
2483 | sreloc = bfd_get_section_by_name (dynobj, rel_sec_name); | |
2484 | if (sreloc == NULL) | |
2485 | { | |
dc810e39 AM |
2486 | flagword flags; |
2487 | ||
252b5132 | 2488 | sreloc = bfd_make_section (dynobj, rel_sec_name); |
dc810e39 AM |
2489 | flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
2490 | | SEC_LINKER_CREATED | SEC_READONLY); | |
2491 | if (sec->flags & SEC_ALLOC) | |
2492 | flags |= SEC_ALLOC | SEC_LOAD; | |
252b5132 | 2493 | if (sreloc == NULL |
dc810e39 | 2494 | || !bfd_set_section_flags (dynobj, sreloc, flags) |
252b5132 RH |
2495 | || !bfd_set_section_alignment (dynobj, sreloc, 3)) |
2496 | return false; | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | if (h) | |
2501 | { | |
2502 | /* Since we havn't seen all of the input symbols yet, we | |
2503 | don't know whether we'll actually need a dynamic relocation | |
2504 | entry for this reloc. So make a record of it. Once we | |
2505 | find out if this thing needs dynamic relocation we'll | |
fe8bc63d | 2506 | expand the relocation sections by the appropriate amount. */ |
252b5132 RH |
2507 | |
2508 | struct alpha_elf_reloc_entry *rent; | |
2509 | ||
2510 | for (rent = h->reloc_entries; rent; rent = rent->next) | |
2511 | if (rent->rtype == r_type && rent->srel == sreloc) | |
2512 | break; | |
2513 | ||
2514 | if (!rent) | |
2515 | { | |
dc810e39 AM |
2516 | amt = sizeof (struct alpha_elf_reloc_entry); |
2517 | rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt); | |
252b5132 RH |
2518 | if (!rent) |
2519 | return false; | |
2520 | ||
2521 | rent->srel = sreloc; | |
2522 | rent->rtype = r_type; | |
2523 | rent->count = 1; | |
73896efb RH |
2524 | rent->reltext = ((sec->flags & (SEC_READONLY | SEC_ALLOC)) |
2525 | == (SEC_READONLY | SEC_ALLOC)); | |
252b5132 RH |
2526 | |
2527 | rent->next = h->reloc_entries; | |
2528 | h->reloc_entries = rent; | |
2529 | } | |
2530 | else | |
2531 | rent->count++; | |
2532 | } | |
c555c5c5 | 2533 | else if (info->shared && (sec->flags & SEC_ALLOC)) |
252b5132 | 2534 | { |
c555c5c5 AM |
2535 | /* If this is a shared library, and the section is to be |
2536 | loaded into memory, we need a RELATIVE reloc. */ | |
252b5132 | 2537 | sreloc->_raw_size += sizeof (Elf64_External_Rela); |
fcfbdf31 JJ |
2538 | if (sec->flags & SEC_READONLY) |
2539 | info->flags |= DF_TEXTREL; | |
252b5132 RH |
2540 | } |
2541 | break; | |
2542 | } | |
2543 | } | |
2544 | ||
2545 | return true; | |
2546 | } | |
2547 | ||
2548 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2549 | regular object. The current definition is in some section of the | |
2550 | dynamic object, but we're not including those sections. We have to | |
2551 | change the definition to something the rest of the link can | |
2552 | understand. */ | |
2553 | ||
2554 | static boolean | |
2555 | elf64_alpha_adjust_dynamic_symbol (info, h) | |
2556 | struct bfd_link_info *info; | |
2557 | struct elf_link_hash_entry *h; | |
2558 | { | |
2559 | bfd *dynobj; | |
2560 | asection *s; | |
2561 | struct alpha_elf_link_hash_entry *ah; | |
2562 | ||
2563 | dynobj = elf_hash_table(info)->dynobj; | |
2564 | ah = (struct alpha_elf_link_hash_entry *)h; | |
2565 | ||
2566 | /* Now that we've seen all of the input symbols, finalize our decision | |
2567 | about whether this symbol should get a .plt entry. */ | |
2568 | ||
8ba89f17 | 2569 | if (alpha_elf_dynamic_symbol_p (h, info) |
252b5132 RH |
2570 | && ((h->type == STT_FUNC |
2571 | && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR)) | |
2572 | || (h->type == STT_NOTYPE | |
2573 | && ah->flags == ALPHA_ELF_LINK_HASH_LU_FUNC)) | |
2574 | /* Don't prevent otherwise valid programs from linking by attempting | |
2575 | to create a new .got entry somewhere. A Correct Solution would be | |
2576 | to add a new .got section to a new object file and let it be merged | |
2577 | somewhere later. But for now don't bother. */ | |
2578 | && ah->got_entries) | |
2579 | { | |
2580 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
2581 | ||
2582 | s = bfd_get_section_by_name(dynobj, ".plt"); | |
2583 | if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) | |
2584 | return false; | |
2585 | ||
2586 | /* The first bit of the .plt is reserved. */ | |
2587 | if (s->_raw_size == 0) | |
2588 | s->_raw_size = PLT_HEADER_SIZE; | |
2589 | ||
2590 | h->plt.offset = s->_raw_size; | |
2591 | s->_raw_size += PLT_ENTRY_SIZE; | |
2592 | ||
2593 | /* If this symbol is not defined in a regular file, and we are not | |
2594 | generating a shared library, then set the symbol to the location | |
2595 | in the .plt. This is required to make function pointers compare | |
2596 | equal between the normal executable and the shared library. */ | |
2597 | if (! info->shared | |
2598 | && h->root.type != bfd_link_hash_defweak) | |
2599 | { | |
2600 | h->root.u.def.section = s; | |
2601 | h->root.u.def.value = h->plt.offset; | |
2602 | } | |
2603 | ||
2604 | /* We also need a JMP_SLOT entry in the .rela.plt section. */ | |
2605 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
2606 | BFD_ASSERT (s != NULL); | |
2607 | s->_raw_size += sizeof (Elf64_External_Rela); | |
2608 | ||
2609 | return true; | |
2610 | } | |
2611 | else | |
2612 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
2613 | ||
2614 | /* If this is a weak symbol, and there is a real definition, the | |
2615 | processor independent code will have arranged for us to see the | |
2616 | real definition first, and we can just use the same value. */ | |
2617 | if (h->weakdef != NULL) | |
2618 | { | |
2619 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
2620 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
2621 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
2622 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
2623 | return true; | |
2624 | } | |
2625 | ||
2626 | /* This is a reference to a symbol defined by a dynamic object which | |
2627 | is not a function. The Alpha, since it uses .got entries for all | |
2628 | symbols even in regular objects, does not need the hackery of a | |
2629 | .dynbss section and COPY dynamic relocations. */ | |
2630 | ||
2631 | return true; | |
2632 | } | |
2633 | ||
2634 | /* Symbol versioning can create new symbols, and make our old symbols | |
2635 | indirect to the new ones. Consolidate the got and reloc information | |
2636 | in these situations. */ | |
2637 | ||
2638 | static boolean | |
2639 | elf64_alpha_merge_ind_symbols (hi, dummy) | |
2640 | struct alpha_elf_link_hash_entry *hi; | |
56fc028e | 2641 | PTR dummy ATTRIBUTE_UNUSED; |
252b5132 RH |
2642 | { |
2643 | struct alpha_elf_link_hash_entry *hs; | |
2644 | ||
2645 | if (hi->root.root.type != bfd_link_hash_indirect) | |
2646 | return true; | |
2647 | hs = hi; | |
2648 | do { | |
2649 | hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link; | |
2650 | } while (hs->root.root.type == bfd_link_hash_indirect); | |
2651 | ||
2652 | /* Merge the flags. Whee. */ | |
2653 | ||
2654 | hs->flags |= hi->flags; | |
2655 | ||
2656 | /* Merge the .got entries. Cannibalize the old symbol's list in | |
2657 | doing so, since we don't need it anymore. */ | |
2658 | ||
2659 | if (hs->got_entries == NULL) | |
2660 | hs->got_entries = hi->got_entries; | |
2661 | else | |
2662 | { | |
2663 | struct alpha_elf_got_entry *gi, *gs, *gin, *gsh; | |
2664 | ||
2665 | gsh = hs->got_entries; | |
2666 | for (gi = hi->got_entries; gi ; gi = gin) | |
2667 | { | |
2668 | gin = gi->next; | |
2669 | for (gs = gsh; gs ; gs = gs->next) | |
2670 | if (gi->gotobj == gs->gotobj && gi->addend == gs->addend) | |
2671 | goto got_found; | |
2672 | gi->next = hs->got_entries; | |
2673 | hs->got_entries = gi; | |
2674 | got_found:; | |
2675 | } | |
2676 | } | |
2677 | hi->got_entries = NULL; | |
2678 | ||
2679 | /* And similar for the reloc entries. */ | |
2680 | ||
2681 | if (hs->reloc_entries == NULL) | |
2682 | hs->reloc_entries = hi->reloc_entries; | |
2683 | else | |
2684 | { | |
2685 | struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh; | |
2686 | ||
2687 | rsh = hs->reloc_entries; | |
2688 | for (ri = hi->reloc_entries; ri ; ri = rin) | |
2689 | { | |
2690 | rin = ri->next; | |
2691 | for (rs = rsh; rs ; rs = rs->next) | |
2692 | if (ri->rtype == rs->rtype) | |
2693 | { | |
2694 | rs->count += ri->count; | |
2695 | goto found_reloc; | |
2696 | } | |
2697 | ri->next = hs->reloc_entries; | |
2698 | hs->reloc_entries = ri; | |
2699 | found_reloc:; | |
2700 | } | |
2701 | } | |
2702 | hi->reloc_entries = NULL; | |
2703 | ||
2704 | return true; | |
2705 | } | |
2706 | ||
2707 | /* Is it possible to merge two object file's .got tables? */ | |
2708 | ||
2709 | static boolean | |
2710 | elf64_alpha_can_merge_gots (a, b) | |
2711 | bfd *a, *b; | |
2712 | { | |
2713 | int total = alpha_elf_tdata (a)->total_got_entries; | |
2714 | bfd *bsub; | |
2715 | ||
2716 | /* Trivial quick fallout test. */ | |
2717 | if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES) | |
2718 | return true; | |
2719 | ||
2720 | /* By their nature, local .got entries cannot be merged. */ | |
2721 | if ((total += alpha_elf_tdata (b)->n_local_got_entries) > MAX_GOT_ENTRIES) | |
2722 | return false; | |
2723 | ||
2724 | /* Failing the common trivial comparison, we must effectively | |
2725 | perform the merge. Not actually performing the merge means that | |
2726 | we don't have to store undo information in case we fail. */ | |
2727 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) | |
2728 | { | |
2729 | struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub); | |
2730 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr; | |
2731 | int i, n; | |
2732 | ||
d9bc7a44 | 2733 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; |
252b5132 RH |
2734 | for (i = 0; i < n; ++i) |
2735 | { | |
2736 | struct alpha_elf_got_entry *ae, *be; | |
2737 | struct alpha_elf_link_hash_entry *h; | |
2738 | ||
2739 | h = hashes[i]; | |
2740 | while (h->root.root.type == bfd_link_hash_indirect | |
2741 | || h->root.root.type == bfd_link_hash_warning) | |
2742 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
2743 | ||
2744 | for (be = h->got_entries; be ; be = be->next) | |
2745 | { | |
2746 | if (be->use_count == 0) | |
2747 | continue; | |
2748 | if (be->gotobj != b) | |
2749 | continue; | |
2750 | ||
2751 | for (ae = h->got_entries; ae ; ae = ae->next) | |
2752 | if (ae->gotobj == a && ae->addend == be->addend) | |
2753 | goto global_found; | |
2754 | ||
2755 | if (++total > MAX_GOT_ENTRIES) | |
2756 | return false; | |
2757 | global_found:; | |
2758 | } | |
2759 | } | |
2760 | } | |
2761 | ||
2762 | return true; | |
2763 | } | |
2764 | ||
2765 | /* Actually merge two .got tables. */ | |
2766 | ||
2767 | static void | |
2768 | elf64_alpha_merge_gots (a, b) | |
2769 | bfd *a, *b; | |
2770 | { | |
2771 | int total = alpha_elf_tdata (a)->total_got_entries; | |
2772 | bfd *bsub; | |
2773 | ||
2774 | /* Remember local expansion. */ | |
2775 | { | |
2776 | int e = alpha_elf_tdata (b)->n_local_got_entries; | |
2777 | total += e; | |
2778 | alpha_elf_tdata (a)->n_local_got_entries += e; | |
2779 | } | |
2780 | ||
2781 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) | |
2782 | { | |
2783 | struct alpha_elf_got_entry **local_got_entries; | |
2784 | struct alpha_elf_link_hash_entry **hashes; | |
2785 | Elf_Internal_Shdr *symtab_hdr; | |
2786 | int i, n; | |
2787 | ||
2788 | /* Let the local .got entries know they are part of a new subsegment. */ | |
2789 | local_got_entries = alpha_elf_tdata (bsub)->local_got_entries; | |
2790 | if (local_got_entries) | |
2791 | { | |
2792 | n = elf_tdata (bsub)->symtab_hdr.sh_info; | |
2793 | for (i = 0; i < n; ++i) | |
2794 | { | |
2795 | struct alpha_elf_got_entry *ent; | |
2796 | for (ent = local_got_entries[i]; ent; ent = ent->next) | |
2797 | ent->gotobj = a; | |
2798 | } | |
2799 | } | |
2800 | ||
2801 | /* Merge the global .got entries. */ | |
2802 | hashes = alpha_elf_sym_hashes (bsub); | |
2803 | symtab_hdr = &elf_tdata (bsub)->symtab_hdr; | |
2804 | ||
d9bc7a44 | 2805 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; |
252b5132 RH |
2806 | for (i = 0; i < n; ++i) |
2807 | { | |
2808 | struct alpha_elf_got_entry *ae, *be, **pbe, **start; | |
2809 | struct alpha_elf_link_hash_entry *h; | |
2810 | ||
2811 | h = hashes[i]; | |
2812 | while (h->root.root.type == bfd_link_hash_indirect | |
2813 | || h->root.root.type == bfd_link_hash_warning) | |
2814 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
2815 | ||
2816 | start = &h->got_entries; | |
2817 | for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next) | |
2818 | { | |
2819 | if (be->use_count == 0) | |
2820 | { | |
2821 | *pbe = be->next; | |
2822 | continue; | |
2823 | } | |
2824 | if (be->gotobj != b) | |
2825 | continue; | |
2826 | ||
2827 | for (ae = *start; ae ; ae = ae->next) | |
2828 | if (ae->gotobj == a && ae->addend == be->addend) | |
2829 | { | |
2830 | ae->flags |= be->flags; | |
2831 | ae->use_count += be->use_count; | |
2832 | *pbe = be->next; | |
2833 | goto global_found; | |
2834 | } | |
2835 | be->gotobj = a; | |
2836 | total += 1; | |
2837 | ||
2838 | global_found:; | |
2839 | } | |
2840 | } | |
2841 | ||
2842 | alpha_elf_tdata (bsub)->gotobj = a; | |
2843 | } | |
2844 | alpha_elf_tdata (a)->total_got_entries = total; | |
2845 | ||
2846 | /* Merge the two in_got chains. */ | |
2847 | { | |
2848 | bfd *next; | |
2849 | ||
2850 | bsub = a; | |
2851 | while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL) | |
2852 | bsub = next; | |
2853 | ||
2854 | alpha_elf_tdata (bsub)->in_got_link_next = b; | |
2855 | } | |
2856 | } | |
2857 | ||
2858 | /* Calculate the offsets for the got entries. */ | |
2859 | ||
2860 | static boolean | |
2861 | elf64_alpha_calc_got_offsets_for_symbol (h, arg) | |
2862 | struct alpha_elf_link_hash_entry *h; | |
52b9d213 | 2863 | PTR arg ATTRIBUTE_UNUSED; |
252b5132 RH |
2864 | { |
2865 | struct alpha_elf_got_entry *gotent; | |
2866 | ||
e92d460e AM |
2867 | if (h->root.root.type == bfd_link_hash_warning) |
2868 | h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; | |
2869 | ||
252b5132 RH |
2870 | for (gotent = h->got_entries; gotent; gotent = gotent->next) |
2871 | if (gotent->use_count > 0) | |
2872 | { | |
2873 | bfd_size_type *plge | |
2874 | = &alpha_elf_tdata (gotent->gotobj)->got->_raw_size; | |
2875 | ||
2876 | gotent->got_offset = *plge; | |
2877 | *plge += 8; | |
2878 | } | |
2879 | ||
2880 | return true; | |
2881 | } | |
2882 | ||
2883 | static void | |
2884 | elf64_alpha_calc_got_offsets (info) | |
2885 | struct bfd_link_info *info; | |
2886 | { | |
2887 | bfd *i, *got_list = alpha_elf_hash_table(info)->got_list; | |
2888 | ||
2889 | /* First, zero out the .got sizes, as we may be recalculating the | |
2890 | .got after optimizing it. */ | |
2891 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) | |
2892 | alpha_elf_tdata(i)->got->_raw_size = 0; | |
2893 | ||
2894 | /* Next, fill in the offsets for all the global entries. */ | |
2895 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), | |
2896 | elf64_alpha_calc_got_offsets_for_symbol, | |
2897 | NULL); | |
2898 | ||
2899 | /* Finally, fill in the offsets for the local entries. */ | |
2900 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) | |
2901 | { | |
2902 | bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size; | |
2903 | bfd *j; | |
2904 | ||
2905 | for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) | |
2906 | { | |
2907 | struct alpha_elf_got_entry **local_got_entries, *gotent; | |
2908 | int k, n; | |
2909 | ||
2910 | local_got_entries = alpha_elf_tdata(j)->local_got_entries; | |
2911 | if (!local_got_entries) | |
2912 | continue; | |
2913 | ||
2914 | for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) | |
2915 | for (gotent = local_got_entries[k]; gotent; gotent = gotent->next) | |
2916 | if (gotent->use_count > 0) | |
2917 | { | |
2918 | gotent->got_offset = got_offset; | |
2919 | got_offset += 8; | |
2920 | } | |
2921 | } | |
2922 | ||
2923 | alpha_elf_tdata(i)->got->_raw_size = got_offset; | |
2924 | alpha_elf_tdata(i)->got->_cooked_size = got_offset; | |
2925 | } | |
2926 | } | |
2927 | ||
2928 | /* Constructs the gots. */ | |
2929 | ||
2930 | static boolean | |
2931 | elf64_alpha_size_got_sections (output_bfd, info) | |
52b9d213 | 2932 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2933 | struct bfd_link_info *info; |
2934 | { | |
52b9d213 | 2935 | bfd *i, *got_list, *cur_got_obj = NULL; |
252b5132 RH |
2936 | int something_changed = 0; |
2937 | ||
2938 | got_list = alpha_elf_hash_table (info)->got_list; | |
2939 | ||
2940 | /* On the first time through, pretend we have an existing got list | |
2941 | consisting of all of the input files. */ | |
2942 | if (got_list == NULL) | |
2943 | { | |
2944 | for (i = info->input_bfds; i ; i = i->link_next) | |
2945 | { | |
2946 | bfd *this_got = alpha_elf_tdata (i)->gotobj; | |
2947 | if (this_got == NULL) | |
2948 | continue; | |
2949 | ||
2950 | /* We are assuming no merging has yet ocurred. */ | |
2951 | BFD_ASSERT (this_got == i); | |
2952 | ||
2953 | if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES) | |
2954 | { | |
2955 | /* Yikes! A single object file has too many entries. */ | |
2956 | (*_bfd_error_handler) | |
2957 | (_("%s: .got subsegment exceeds 64K (size %d)"), | |
8f615d07 | 2958 | bfd_archive_filename (i), |
252b5132 RH |
2959 | alpha_elf_tdata (this_got)->total_got_entries * 8); |
2960 | return false; | |
2961 | } | |
2962 | ||
2963 | if (got_list == NULL) | |
2964 | got_list = this_got; | |
2965 | else | |
2966 | alpha_elf_tdata(cur_got_obj)->got_link_next = this_got; | |
2967 | cur_got_obj = this_got; | |
2968 | } | |
2969 | ||
2970 | /* Strange degenerate case of no got references. */ | |
2971 | if (got_list == NULL) | |
2972 | return true; | |
2973 | ||
2974 | alpha_elf_hash_table (info)->got_list = got_list; | |
2975 | ||
2976 | /* Force got offsets to be recalculated. */ | |
2977 | something_changed = 1; | |
2978 | } | |
2979 | ||
2980 | cur_got_obj = got_list; | |
2981 | i = alpha_elf_tdata(cur_got_obj)->got_link_next; | |
2982 | while (i != NULL) | |
2983 | { | |
2984 | if (elf64_alpha_can_merge_gots (cur_got_obj, i)) | |
2985 | { | |
2986 | elf64_alpha_merge_gots (cur_got_obj, i); | |
2987 | i = alpha_elf_tdata(i)->got_link_next; | |
2988 | alpha_elf_tdata(cur_got_obj)->got_link_next = i; | |
2989 | something_changed = 1; | |
2990 | } | |
2991 | else | |
2992 | { | |
2993 | cur_got_obj = i; | |
2994 | i = alpha_elf_tdata(i)->got_link_next; | |
2995 | } | |
2996 | } | |
2997 | ||
2998 | /* Once the gots have been merged, fill in the got offsets for | |
2999 | everything therein. */ | |
3000 | if (1 || something_changed) | |
3001 | elf64_alpha_calc_got_offsets (info); | |
3002 | ||
3003 | return true; | |
3004 | } | |
3005 | ||
3006 | static boolean | |
3007 | elf64_alpha_always_size_sections (output_bfd, info) | |
3008 | bfd *output_bfd; | |
3009 | struct bfd_link_info *info; | |
3010 | { | |
3011 | bfd *i; | |
3012 | ||
3013 | if (info->relocateable) | |
3014 | return true; | |
3015 | ||
3016 | /* First, take care of the indirect symbols created by versioning. */ | |
3017 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), | |
3018 | elf64_alpha_merge_ind_symbols, | |
3019 | NULL); | |
3020 | ||
3021 | if (!elf64_alpha_size_got_sections (output_bfd, info)) | |
3022 | return false; | |
3023 | ||
3024 | /* Allocate space for all of the .got subsections. */ | |
3025 | i = alpha_elf_hash_table (info)->got_list; | |
3026 | for ( ; i ; i = alpha_elf_tdata(i)->got_link_next) | |
3027 | { | |
3028 | asection *s = alpha_elf_tdata(i)->got; | |
3029 | if (s->_raw_size > 0) | |
3030 | { | |
3031 | s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size); | |
3032 | if (s->contents == NULL) | |
3033 | return false; | |
3034 | } | |
3035 | } | |
3036 | ||
3037 | return true; | |
3038 | } | |
3039 | ||
3040 | /* Work out the sizes of the dynamic relocation entries. */ | |
3041 | ||
3042 | static boolean | |
3043 | elf64_alpha_calc_dynrel_sizes (h, info) | |
3044 | struct alpha_elf_link_hash_entry *h; | |
3045 | struct bfd_link_info *info; | |
3046 | { | |
e92d460e AM |
3047 | if (h->root.root.type == bfd_link_hash_warning) |
3048 | h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; | |
3049 | ||
252b5132 RH |
3050 | /* If the symbol was defined as a common symbol in a regular object |
3051 | file, and there was no definition in any dynamic object, then the | |
3052 | linker will have allocated space for the symbol in a common | |
3053 | section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been | |
3054 | set. This is done for dynamic symbols in | |
3055 | elf_adjust_dynamic_symbol but this is not done for non-dynamic | |
3056 | symbols, somehow. */ | |
3057 | if (((h->root.elf_link_hash_flags | |
3058 | & (ELF_LINK_HASH_DEF_REGULAR | |
3059 | | ELF_LINK_HASH_REF_REGULAR | |
3060 | | ELF_LINK_HASH_DEF_DYNAMIC)) | |
3061 | == ELF_LINK_HASH_REF_REGULAR) | |
3062 | && (h->root.root.type == bfd_link_hash_defined | |
3063 | || h->root.root.type == bfd_link_hash_defweak) | |
3064 | && !(h->root.root.u.def.section->owner->flags & DYNAMIC)) | |
3065 | { | |
3066 | h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3067 | } | |
3068 | ||
3069 | /* If the symbol is dynamic, we'll need all the relocations in their | |
3070 | natural form. If this is a shared object, and it has been forced | |
3071 | local, we'll need the same number of RELATIVE relocations. */ | |
3072 | ||
3073 | if (alpha_elf_dynamic_symbol_p (&h->root, info) || info->shared) | |
3074 | { | |
3075 | struct alpha_elf_reloc_entry *relent; | |
3076 | bfd *dynobj; | |
3077 | struct alpha_elf_got_entry *gotent; | |
3078 | bfd_size_type count; | |
3079 | asection *srel; | |
3080 | ||
3081 | for (relent = h->reloc_entries; relent; relent = relent->next) | |
3082 | if (relent->rtype == R_ALPHA_REFLONG | |
3083 | || relent->rtype == R_ALPHA_REFQUAD) | |
3084 | { | |
3085 | relent->srel->_raw_size += | |
fe8bc63d | 3086 | sizeof (Elf64_External_Rela) * relent->count; |
fcfbdf31 JJ |
3087 | if (relent->reltext) |
3088 | info->flags |= DT_TEXTREL; | |
252b5132 RH |
3089 | } |
3090 | ||
3091 | dynobj = elf_hash_table(info)->dynobj; | |
3092 | count = 0; | |
3093 | ||
3094 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) | |
3095 | count++; | |
3096 | ||
3097 | /* If we are using a .plt entry, subtract one, as the first | |
3098 | reference uses a .rela.plt entry instead. */ | |
3099 | if (h->root.plt.offset != MINUS_ONE) | |
3100 | count--; | |
3101 | ||
3102 | if (count > 0) | |
3103 | { | |
3104 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); | |
3105 | BFD_ASSERT (srel != NULL); | |
3106 | srel->_raw_size += sizeof (Elf64_External_Rela) * count; | |
3107 | } | |
3108 | } | |
3109 | ||
3110 | return true; | |
3111 | } | |
3112 | ||
3113 | /* Set the sizes of the dynamic sections. */ | |
3114 | ||
3115 | static boolean | |
3116 | elf64_alpha_size_dynamic_sections (output_bfd, info) | |
24a35864 | 3117 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
3118 | struct bfd_link_info *info; |
3119 | { | |
3120 | bfd *dynobj; | |
3121 | asection *s; | |
252b5132 RH |
3122 | boolean relplt; |
3123 | ||
3124 | dynobj = elf_hash_table(info)->dynobj; | |
3125 | BFD_ASSERT(dynobj != NULL); | |
3126 | ||
3127 | if (elf_hash_table (info)->dynamic_sections_created) | |
3128 | { | |
3129 | /* Set the contents of the .interp section to the interpreter. */ | |
3130 | if (!info->shared) | |
3131 | { | |
3132 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
3133 | BFD_ASSERT (s != NULL); | |
3134 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
3135 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
3136 | } | |
3137 | ||
3138 | /* Now that we've seen all of the input files, we can decide which | |
3139 | symbols need dynamic relocation entries and which don't. We've | |
3140 | collected information in check_relocs that we can now apply to | |
3141 | size the dynamic relocation sections. */ | |
3142 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), | |
3143 | elf64_alpha_calc_dynrel_sizes, | |
3144 | info); | |
3145 | ||
3146 | /* When building shared libraries, each local .got entry needs a | |
3147 | RELATIVE reloc. */ | |
3148 | if (info->shared) | |
3149 | { | |
3150 | bfd *i; | |
3151 | asection *srel; | |
3152 | bfd_size_type count; | |
3153 | ||
3154 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); | |
3155 | BFD_ASSERT (srel != NULL); | |
3156 | ||
3157 | for (i = alpha_elf_hash_table(info)->got_list, count = 0; | |
3158 | i != NULL; | |
3159 | i = alpha_elf_tdata(i)->got_link_next) | |
3160 | count += alpha_elf_tdata(i)->n_local_got_entries; | |
3161 | ||
fe8bc63d | 3162 | srel->_raw_size += count * sizeof (Elf64_External_Rela); |
252b5132 RH |
3163 | } |
3164 | } | |
3165 | /* else we're not dynamic and by definition we don't need such things. */ | |
3166 | ||
3167 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
3168 | determined the sizes of the various dynamic sections. Allocate | |
3169 | memory for them. */ | |
252b5132 RH |
3170 | relplt = false; |
3171 | for (s = dynobj->sections; s != NULL; s = s->next) | |
3172 | { | |
3173 | const char *name; | |
3174 | boolean strip; | |
3175 | ||
3176 | if (!(s->flags & SEC_LINKER_CREATED)) | |
3177 | continue; | |
3178 | ||
3179 | /* It's OK to base decisions on the section name, because none | |
3180 | of the dynobj section names depend upon the input files. */ | |
3181 | name = bfd_get_section_name (dynobj, s); | |
3182 | ||
3183 | /* If we don't need this section, strip it from the output file. | |
3184 | This is to handle .rela.bss and .rela.plt. We must create it | |
3185 | in create_dynamic_sections, because it must be created before | |
3186 | the linker maps input sections to output sections. The | |
3187 | linker does that before adjust_dynamic_symbol is called, and | |
3188 | it is that function which decides whether anything needs to | |
3189 | go into these sections. */ | |
3190 | ||
3191 | strip = false; | |
3192 | ||
3193 | if (strncmp (name, ".rela", 5) == 0) | |
3194 | { | |
3195 | strip = (s->_raw_size == 0); | |
3196 | ||
3197 | if (!strip) | |
3198 | { | |
252b5132 RH |
3199 | if (strcmp(name, ".rela.plt") == 0) |
3200 | relplt = true; | |
3201 | ||
3202 | /* We use the reloc_count field as a counter if we need | |
3203 | to copy relocs into the output file. */ | |
3204 | s->reloc_count = 0; | |
3205 | } | |
3206 | } | |
3207 | else if (strcmp (name, ".plt") != 0) | |
3208 | { | |
3209 | /* It's not one of our dynamic sections, so don't allocate space. */ | |
3210 | continue; | |
3211 | } | |
3212 | ||
3213 | if (strip) | |
7f8d5fc9 | 3214 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3215 | else |
3216 | { | |
3217 | /* Allocate memory for the section contents. */ | |
dc810e39 | 3218 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
252b5132 RH |
3219 | if (s->contents == NULL && s->_raw_size != 0) |
3220 | return false; | |
3221 | } | |
3222 | } | |
3223 | ||
252b5132 RH |
3224 | if (elf_hash_table (info)->dynamic_sections_created) |
3225 | { | |
3226 | /* Add some entries to the .dynamic section. We fill in the | |
3227 | values later, in elf64_alpha_finish_dynamic_sections, but we | |
3228 | must add the entries now so that we get the correct size for | |
3229 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3230 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
3231 | #define add_dynamic_entry(TAG, VAL) \ |
3232 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
3233 | ||
252b5132 RH |
3234 | if (!info->shared) |
3235 | { | |
dc810e39 | 3236 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
252b5132 RH |
3237 | return false; |
3238 | } | |
3239 | ||
dc810e39 | 3240 | if (!add_dynamic_entry (DT_PLTGOT, 0)) |
252b5132 RH |
3241 | return false; |
3242 | ||
3243 | if (relplt) | |
3244 | { | |
dc810e39 AM |
3245 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) |
3246 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3247 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
252b5132 RH |
3248 | return false; |
3249 | } | |
3250 | ||
dc810e39 AM |
3251 | if (!add_dynamic_entry (DT_RELA, 0) |
3252 | || !add_dynamic_entry (DT_RELASZ, 0) | |
3253 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
252b5132 RH |
3254 | return false; |
3255 | ||
fcfbdf31 | 3256 | if (info->flags & DF_TEXTREL) |
252b5132 | 3257 | { |
dc810e39 | 3258 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
252b5132 RH |
3259 | return false; |
3260 | } | |
3261 | } | |
dc810e39 | 3262 | #undef add_dynamic_entry |
252b5132 RH |
3263 | |
3264 | return true; | |
3265 | } | |
3266 | ||
252b5132 RH |
3267 | /* Relocate an Alpha ELF section. */ |
3268 | ||
3269 | static boolean | |
3270 | elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, | |
3271 | contents, relocs, local_syms, local_sections) | |
3272 | bfd *output_bfd; | |
3273 | struct bfd_link_info *info; | |
3274 | bfd *input_bfd; | |
3275 | asection *input_section; | |
3276 | bfd_byte *contents; | |
3277 | Elf_Internal_Rela *relocs; | |
3278 | Elf_Internal_Sym *local_syms; | |
3279 | asection **local_sections; | |
3280 | { | |
3281 | Elf_Internal_Shdr *symtab_hdr; | |
3282 | Elf_Internal_Rela *rel; | |
3283 | Elf_Internal_Rela *relend; | |
3284 | asection *sec, *sgot, *srel, *srelgot; | |
3285 | bfd *dynobj, *gotobj; | |
3286 | bfd_vma gp; | |
f16fbd61 | 3287 | boolean ret_val = true; |
252b5132 RH |
3288 | |
3289 | srelgot = srel = NULL; | |
3290 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3291 | dynobj = elf_hash_table (info)->dynobj; | |
3292 | if (dynobj) | |
3293 | { | |
3294 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
3295 | } | |
3296 | ||
3297 | /* Find the gp value for this input bfd. */ | |
3298 | sgot = NULL; | |
3299 | gp = 0; | |
3300 | gotobj = alpha_elf_tdata (input_bfd)->gotobj; | |
3301 | if (gotobj) | |
3302 | { | |
3303 | sgot = alpha_elf_tdata (gotobj)->got; | |
3304 | gp = _bfd_get_gp_value (gotobj); | |
3305 | if (gp == 0) | |
3306 | { | |
3307 | gp = (sgot->output_section->vma | |
3308 | + sgot->output_offset | |
3309 | + 0x8000); | |
3310 | _bfd_set_gp_value (gotobj, gp); | |
3311 | } | |
3312 | } | |
3313 | ||
3314 | rel = relocs; | |
3315 | relend = relocs + input_section->reloc_count; | |
3316 | for (; rel < relend; rel++) | |
3317 | { | |
3318 | int r_type; | |
3319 | reloc_howto_type *howto; | |
3320 | unsigned long r_symndx; | |
3321 | struct alpha_elf_link_hash_entry *h; | |
3322 | Elf_Internal_Sym *sym; | |
3323 | bfd_vma relocation; | |
dc810e39 | 3324 | bfd_vma addend; |
252b5132 RH |
3325 | bfd_reloc_status_type r; |
3326 | ||
3327 | r_type = ELF64_R_TYPE(rel->r_info); | |
3328 | if (r_type < 0 || r_type >= (int) R_ALPHA_max) | |
3329 | { | |
3330 | bfd_set_error (bfd_error_bad_value); | |
3331 | return false; | |
3332 | } | |
3333 | howto = elf64_alpha_howto_table + r_type; | |
3334 | ||
3335 | r_symndx = ELF64_R_SYM(rel->r_info); | |
3336 | ||
3337 | if (info->relocateable) | |
3338 | { | |
3339 | /* This is a relocateable link. We don't have to change | |
3340 | anything, unless the reloc is against a section symbol, | |
3341 | in which case we have to adjust according to where the | |
3342 | section symbol winds up in the output section. */ | |
72b60c23 | 3343 | |
fe8bc63d | 3344 | /* The symbol associated with GPDISP and LITUSE is |
72b60c23 RH |
3345 | immaterial. Only the addend is significant. */ |
3346 | if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE) | |
3347 | continue; | |
3348 | ||
252b5132 RH |
3349 | if (r_symndx < symtab_hdr->sh_info) |
3350 | { | |
3351 | sym = local_syms + r_symndx; | |
3352 | if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) | |
3353 | { | |
3354 | sec = local_sections[r_symndx]; | |
3355 | rel->r_addend += sec->output_offset + sym->st_value; | |
3356 | } | |
3357 | } | |
3358 | ||
3359 | continue; | |
3360 | } | |
3361 | ||
3362 | /* This is a final link. */ | |
3363 | ||
3364 | h = NULL; | |
3365 | sym = NULL; | |
3366 | sec = NULL; | |
3367 | ||
3368 | if (r_symndx < symtab_hdr->sh_info) | |
3369 | { | |
3370 | sym = local_syms + r_symndx; | |
3371 | sec = local_sections[r_symndx]; | |
f8df10f4 | 3372 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
252b5132 RH |
3373 | } |
3374 | else | |
3375 | { | |
3376 | h = alpha_elf_sym_hashes (input_bfd)[r_symndx - symtab_hdr->sh_info]; | |
3377 | ||
3378 | while (h->root.root.type == bfd_link_hash_indirect | |
3379 | || h->root.root.type == bfd_link_hash_warning) | |
3380 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
3381 | ||
3382 | if (h->root.root.type == bfd_link_hash_defined | |
3383 | || h->root.root.type == bfd_link_hash_defweak) | |
3384 | { | |
3385 | sec = h->root.root.u.def.section; | |
3386 | ||
252b5132 RH |
3387 | if (sec->output_section == NULL) |
3388 | relocation = 0; | |
252b5132 RH |
3389 | else |
3390 | { | |
3391 | relocation = (h->root.root.u.def.value | |
3392 | + sec->output_section->vma | |
3393 | + sec->output_offset); | |
3394 | } | |
3395 | } | |
3396 | else if (h->root.root.type == bfd_link_hash_undefweak) | |
3397 | relocation = 0; | |
671bae9c NC |
3398 | else if (info->shared |
3399 | && (!info->symbolic || info->allow_shlib_undefined) | |
3a27a730 | 3400 | && !info->no_undefined |
edb72b3b | 3401 | && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT) |
252b5132 RH |
3402 | relocation = 0; |
3403 | else | |
3404 | { | |
3405 | if (!((*info->callbacks->undefined_symbol) | |
3406 | (info, h->root.root.root.string, input_bfd, | |
5cc7c785 | 3407 | input_section, rel->r_offset, |
3a27a730 | 3408 | (!info->shared || info->no_undefined |
edb72b3b | 3409 | || ELF_ST_VISIBILITY (h->root.other))))) |
f16fbd61 | 3410 | ret_val = false; |
252b5132 RH |
3411 | relocation = 0; |
3412 | } | |
3413 | } | |
3414 | addend = rel->r_addend; | |
3415 | ||
3416 | switch (r_type) | |
3417 | { | |
3418 | case R_ALPHA_GPDISP: | |
3419 | { | |
3420 | bfd_byte *p_ldah, *p_lda; | |
3421 | ||
3422 | BFD_ASSERT(gp != 0); | |
3423 | ||
3424 | relocation = (input_section->output_section->vma | |
3425 | + input_section->output_offset | |
3426 | + rel->r_offset); | |
3427 | ||
3428 | p_ldah = contents + rel->r_offset - input_section->vma; | |
3429 | p_lda = p_ldah + rel->r_addend; | |
3430 | ||
3431 | r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - relocation, | |
3432 | p_ldah, p_lda); | |
3433 | } | |
3434 | break; | |
3435 | ||
252b5132 RH |
3436 | case R_ALPHA_LITERAL: |
3437 | { | |
3438 | struct alpha_elf_got_entry *gotent; | |
3439 | boolean dynamic_symbol; | |
3440 | ||
3441 | BFD_ASSERT(sgot != NULL); | |
3442 | BFD_ASSERT(gp != 0); | |
3443 | ||
3444 | if (h != NULL) | |
3445 | { | |
3446 | gotent = h->got_entries; | |
3447 | dynamic_symbol = alpha_elf_dynamic_symbol_p (&h->root, info); | |
3448 | } | |
3449 | else | |
3450 | { | |
3451 | gotent = (alpha_elf_tdata(input_bfd)-> | |
3452 | local_got_entries[r_symndx]); | |
3453 | dynamic_symbol = false; | |
f7460f5f JJ |
3454 | |
3455 | /* Need to adjust local GOT entries' addends for SEC_MERGE | |
3456 | unless it has been done already. */ | |
3457 | if ((sec->flags & SEC_MERGE) | |
3458 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
65765700 JJ |
3459 | && (elf_section_data (sec)->sec_info_type |
3460 | == ELF_INFO_TYPE_MERGE) | |
f7460f5f JJ |
3461 | && (gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_XLATED) == 0) |
3462 | { | |
3463 | struct alpha_elf_got_entry *ent; | |
3464 | asection *msec; | |
3465 | ||
3466 | for (ent = gotent; ent; ent = ent->next) | |
3467 | { | |
3468 | ent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_XLATED; | |
3469 | if (ent->use_count == 0) | |
3470 | continue; | |
3471 | msec = sec; | |
3472 | ent->addend = | |
3473 | _bfd_merged_section_offset (output_bfd, &msec, | |
3474 | elf_section_data (sec)-> | |
65765700 | 3475 | sec_info, |
f7460f5f JJ |
3476 | sym->st_value |
3477 | + ent->addend, | |
3478 | (bfd_vma) 0); | |
3479 | ent->addend -= sym->st_value; | |
3480 | ent->addend += msec->output_section->vma | |
3481 | + msec->output_offset | |
3482 | - sec->output_section->vma | |
3483 | - sec->output_offset; | |
3484 | } | |
3485 | } | |
252b5132 RH |
3486 | } |
3487 | ||
3488 | BFD_ASSERT(gotent != NULL); | |
3489 | ||
3490 | while (gotent->gotobj != gotobj || gotent->addend != addend) | |
3491 | gotent = gotent->next; | |
3492 | ||
3493 | BFD_ASSERT(gotent->use_count >= 1); | |
3494 | ||
3495 | /* Initialize the .got entry's value. */ | |
3496 | if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE)) | |
3497 | { | |
dc810e39 | 3498 | bfd_put_64 (output_bfd, relocation + addend, |
252b5132 RH |
3499 | sgot->contents + gotent->got_offset); |
3500 | ||
3501 | /* If the symbol has been forced local, output a | |
3502 | RELATIVE reloc, otherwise it will be handled in | |
3503 | finish_dynamic_symbol. */ | |
3504 | if (info->shared && !dynamic_symbol) | |
3505 | { | |
3506 | Elf_Internal_Rela outrel; | |
3507 | ||
3508 | BFD_ASSERT(srelgot != NULL); | |
3509 | ||
3510 | outrel.r_offset = (sgot->output_section->vma | |
3511 | + sgot->output_offset | |
3512 | + gotent->got_offset); | |
3513 | outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE); | |
dc810e39 | 3514 | outrel.r_addend = relocation + addend; |
252b5132 RH |
3515 | |
3516 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
3517 | ((Elf64_External_Rela *) | |
3518 | srelgot->contents) | |
3519 | + srelgot->reloc_count++); | |
fe8bc63d | 3520 | BFD_ASSERT (sizeof (Elf64_External_Rela) |
252b5132 RH |
3521 | * srelgot->reloc_count |
3522 | <= srelgot->_cooked_size); | |
3523 | } | |
3524 | ||
3525 | gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE; | |
3526 | } | |
3527 | ||
3528 | /* Figure the gprel relocation. */ | |
3529 | addend = 0; | |
3530 | relocation = (sgot->output_section->vma | |
3531 | + sgot->output_offset | |
3532 | + gotent->got_offset); | |
3533 | relocation -= gp; | |
3534 | } | |
3535 | /* overflow handled by _bfd_final_link_relocate */ | |
3536 | goto default_reloc; | |
3537 | ||
dfe57ca0 | 3538 | case R_ALPHA_GPREL16: |
252b5132 RH |
3539 | case R_ALPHA_GPREL32: |
3540 | case R_ALPHA_GPRELLOW: | |
f16fbd61 RH |
3541 | if (h && alpha_elf_dynamic_symbol_p (&h->root, info)) |
3542 | { | |
3543 | (*_bfd_error_handler) | |
3544 | (_("%s: gp-relative relocation against dynamic symbol %s"), | |
8f615d07 | 3545 | bfd_archive_filename (input_bfd), h->root.root.root.string); |
f16fbd61 RH |
3546 | ret_val = false; |
3547 | } | |
252b5132 RH |
3548 | BFD_ASSERT(gp != 0); |
3549 | relocation -= gp; | |
3550 | goto default_reloc; | |
3551 | ||
3552 | case R_ALPHA_GPRELHIGH: | |
f16fbd61 RH |
3553 | if (h && alpha_elf_dynamic_symbol_p (&h->root, info)) |
3554 | { | |
3555 | (*_bfd_error_handler) | |
3556 | (_("%s: gp-relative relocation against dynamic symbol %s"), | |
8f615d07 | 3557 | bfd_archive_filename (input_bfd), h->root.root.root.string); |
f16fbd61 RH |
3558 | ret_val = false; |
3559 | } | |
252b5132 RH |
3560 | BFD_ASSERT(gp != 0); |
3561 | relocation -= gp; | |
3562 | relocation += addend; | |
3563 | addend = 0; | |
3564 | relocation = (((bfd_signed_vma) relocation >> 16) | |
3565 | + ((relocation >> 15) & 1)); | |
3566 | goto default_reloc; | |
3567 | ||
252b5132 | 3568 | case R_ALPHA_HINT: |
f94952df RH |
3569 | /* A call to a dynamic symbol is definitely out of range of |
3570 | the 16-bit displacement. Don't bother writing anything. */ | |
3571 | if (h && alpha_elf_dynamic_symbol_p (&h->root, info)) | |
3572 | { | |
3573 | r = bfd_reloc_ok; | |
3574 | break; | |
3575 | } | |
3576 | /* FALLTHRU */ | |
3577 | ||
3578 | case R_ALPHA_BRADDR: | |
252b5132 RH |
3579 | /* The regular PC-relative stuff measures from the start of |
3580 | the instruction rather than the end. */ | |
3581 | addend -= 4; | |
3582 | goto default_reloc; | |
3583 | ||
7793f4d0 RH |
3584 | case R_ALPHA_BRSGP: |
3585 | { | |
3586 | int other; | |
3587 | const char *name; | |
3588 | ||
3589 | /* The regular PC-relative stuff measures from the start of | |
3590 | the instruction rather than the end. */ | |
3591 | addend -= 4; | |
3592 | ||
ccf00ab6 RH |
3593 | /* The source and destination gp must be the same. Note that |
3594 | the source will always have an assigned gp, since we forced | |
3595 | one in check_relocs, but that the destination may not, as | |
3596 | it might not have had any relocations at all. Also take | |
3597 | care not to crash if H is an undefined symbol. */ | |
3598 | if (h != NULL && sec != NULL | |
3599 | && alpha_elf_tdata (sec->owner)->gotobj | |
7793f4d0 RH |
3600 | && gotobj != alpha_elf_tdata (sec->owner)->gotobj) |
3601 | { | |
7793f4d0 RH |
3602 | (*_bfd_error_handler) |
3603 | (_("%s: change in gp: BRSGP %s"), | |
ccf00ab6 | 3604 | bfd_archive_filename (input_bfd), h->root.root.root.string); |
7793f4d0 RH |
3605 | ret_val = false; |
3606 | } | |
3607 | ||
3608 | /* The symbol should be marked either NOPV or STD_GPLOAD. */ | |
3609 | if (h != NULL) | |
3610 | other = h->root.other; | |
3611 | else | |
3612 | other = sym->st_other; | |
3613 | switch (other & STO_ALPHA_STD_GPLOAD) | |
3614 | { | |
3615 | case STO_ALPHA_NOPV: | |
3616 | break; | |
3617 | case STO_ALPHA_STD_GPLOAD: | |
3618 | addend += 8; | |
3619 | break; | |
3620 | default: | |
3621 | if (h != NULL) | |
3622 | name = h->root.root.root.string; | |
3623 | else | |
3624 | { | |
3625 | name = (bfd_elf_string_from_elf_section | |
3626 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
3627 | if (name == NULL) | |
3628 | name = _("<unknown>"); | |
3629 | else if (name[0] == 0) | |
3630 | name = bfd_section_name (input_bfd, sec); | |
3631 | } | |
3632 | (*_bfd_error_handler) | |
3633 | (_("%s: !samegp reloc against symbol without .prologue: %s"), | |
3634 | bfd_archive_filename (input_bfd), name); | |
3635 | ret_val = false; | |
3636 | break; | |
3637 | } | |
3638 | ||
3639 | goto default_reloc; | |
3640 | } | |
3641 | ||
252b5132 RH |
3642 | case R_ALPHA_REFLONG: |
3643 | case R_ALPHA_REFQUAD: | |
3644 | { | |
3645 | Elf_Internal_Rela outrel; | |
252b5132 RH |
3646 | |
3647 | /* Careful here to remember RELATIVE relocations for global | |
3648 | variables for symbolic shared objects. */ | |
3649 | ||
3650 | if (h && alpha_elf_dynamic_symbol_p (&h->root, info)) | |
3651 | { | |
3652 | BFD_ASSERT(h->root.dynindx != -1); | |
3653 | outrel.r_info = ELF64_R_INFO(h->root.dynindx, r_type); | |
3654 | outrel.r_addend = addend; | |
3655 | addend = 0, relocation = 0; | |
3656 | } | |
ec338859 AM |
3657 | else if (info->shared |
3658 | && r_symndx != 0 | |
3659 | && (input_section->flags & SEC_ALLOC)) | |
252b5132 RH |
3660 | { |
3661 | outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE); | |
28cfee26 | 3662 | outrel.r_addend = relocation + addend; |
252b5132 RH |
3663 | } |
3664 | else | |
3665 | goto default_reloc; | |
3666 | ||
3667 | if (!srel) | |
3668 | { | |
3669 | const char *name; | |
3670 | ||
3671 | name = (bfd_elf_string_from_elf_section | |
3672 | (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, | |
3673 | elf_section_data(input_section)->rel_hdr.sh_name)); | |
3674 | BFD_ASSERT(name != NULL); | |
3675 | ||
3676 | srel = bfd_get_section_by_name (dynobj, name); | |
3677 | BFD_ASSERT(srel != NULL); | |
3678 | } | |
3679 | ||
c629eae0 JJ |
3680 | outrel.r_offset = |
3681 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3682 | rel->r_offset); | |
0bb2d96a | 3683 | if ((outrel.r_offset | 1) != (bfd_vma) -1) |
252b5132 RH |
3684 | outrel.r_offset += (input_section->output_section->vma |
3685 | + input_section->output_offset); | |
3686 | else | |
3687 | memset (&outrel, 0, sizeof outrel); | |
3688 | ||
3689 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
3690 | ((Elf64_External_Rela *) | |
3691 | srel->contents) | |
3692 | + srel->reloc_count++); | |
fe8bc63d | 3693 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count |
252b5132 RH |
3694 | <= srel->_cooked_size); |
3695 | } | |
3696 | goto default_reloc; | |
3697 | ||
3698 | default: | |
3699 | default_reloc: | |
3700 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3701 | contents, rel->r_offset, relocation, | |
3702 | addend); | |
3703 | break; | |
3704 | } | |
3705 | ||
3706 | switch (r) | |
3707 | { | |
3708 | case bfd_reloc_ok: | |
3709 | break; | |
3710 | ||
3711 | case bfd_reloc_overflow: | |
3712 | { | |
3713 | const char *name; | |
3714 | ||
ed4de5e2 JJ |
3715 | /* Don't warn if the overflow is due to pc relative reloc |
3716 | against discarded section. Section optimization code should | |
3717 | handle it. */ | |
3718 | ||
3719 | if (r_symndx < symtab_hdr->sh_info | |
3720 | && sec != NULL && howto->pc_relative | |
3721 | && elf_discarded_section (sec)) | |
3722 | break; | |
3723 | ||
252b5132 RH |
3724 | if (h != NULL) |
3725 | name = h->root.root.root.string; | |
3726 | else | |
3727 | { | |
3728 | name = (bfd_elf_string_from_elf_section | |
3729 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
3730 | if (name == NULL) | |
3731 | return false; | |
3732 | if (*name == '\0') | |
3733 | name = bfd_section_name (input_bfd, sec); | |
3734 | } | |
3735 | if (! ((*info->callbacks->reloc_overflow) | |
3736 | (info, name, howto->name, (bfd_vma) 0, | |
3737 | input_bfd, input_section, rel->r_offset))) | |
f16fbd61 | 3738 | ret_val = false; |
252b5132 RH |
3739 | } |
3740 | break; | |
3741 | ||
3742 | default: | |
3743 | case bfd_reloc_outofrange: | |
3744 | abort (); | |
3745 | } | |
3746 | } | |
3747 | ||
f16fbd61 | 3748 | return ret_val; |
252b5132 RH |
3749 | } |
3750 | ||
3751 | /* Finish up dynamic symbol handling. We set the contents of various | |
3752 | dynamic sections here. */ | |
3753 | ||
3754 | static boolean | |
3755 | elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym) | |
3756 | bfd *output_bfd; | |
3757 | struct bfd_link_info *info; | |
3758 | struct elf_link_hash_entry *h; | |
3759 | Elf_Internal_Sym *sym; | |
3760 | { | |
3761 | bfd *dynobj = elf_hash_table(info)->dynobj; | |
3762 | ||
3763 | if (h->plt.offset != MINUS_ONE) | |
3764 | { | |
3765 | /* Fill in the .plt entry for this symbol. */ | |
3766 | asection *splt, *sgot, *srel; | |
3767 | Elf_Internal_Rela outrel; | |
3768 | bfd_vma got_addr, plt_addr; | |
3769 | bfd_vma plt_index; | |
3770 | struct alpha_elf_got_entry *gotent; | |
3771 | ||
3772 | BFD_ASSERT (h->dynindx != -1); | |
3773 | ||
3774 | /* The first .got entry will be updated by the .plt with the | |
3775 | address of the target function. */ | |
3776 | gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; | |
3777 | BFD_ASSERT (gotent && gotent->addend == 0); | |
3778 | ||
3779 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3780 | BFD_ASSERT (splt != NULL); | |
3781 | srel = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
3782 | BFD_ASSERT (srel != NULL); | |
3783 | sgot = alpha_elf_tdata (gotent->gotobj)->got; | |
3784 | BFD_ASSERT (sgot != NULL); | |
3785 | ||
3786 | got_addr = (sgot->output_section->vma | |
3787 | + sgot->output_offset | |
3788 | + gotent->got_offset); | |
3789 | plt_addr = (splt->output_section->vma | |
3790 | + splt->output_offset | |
3791 | + h->plt.offset); | |
3792 | ||
3793 | plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; | |
3794 | ||
3795 | /* Fill in the entry in the procedure linkage table. */ | |
3796 | { | |
dc810e39 | 3797 | bfd_vma insn1, insn2, insn3; |
252b5132 RH |
3798 | |
3799 | insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff); | |
3800 | insn2 = PLT_ENTRY_WORD2; | |
3801 | insn3 = PLT_ENTRY_WORD3; | |
3802 | ||
3803 | bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset); | |
3804 | bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4); | |
3805 | bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8); | |
3806 | } | |
3807 | ||
3808 | /* Fill in the entry in the .rela.plt section. */ | |
3809 | outrel.r_offset = got_addr; | |
3810 | outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT); | |
3811 | outrel.r_addend = 0; | |
3812 | ||
3813 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
3814 | ((Elf64_External_Rela *)srel->contents | |
3815 | + plt_index)); | |
3816 | ||
3817 | if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
3818 | { | |
3819 | /* Mark the symbol as undefined, rather than as defined in the | |
3820 | .plt section. Leave the value alone. */ | |
3821 | sym->st_shndx = SHN_UNDEF; | |
3822 | } | |
3823 | ||
3824 | /* Fill in the entries in the .got. */ | |
3825 | bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset); | |
3826 | ||
3827 | /* Subsequent .got entries will continue to bounce through the .plt. */ | |
3828 | if (gotent->next) | |
3829 | { | |
3830 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); | |
3831 | BFD_ASSERT (! info->shared || srel != NULL); | |
3832 | ||
3833 | gotent = gotent->next; | |
3834 | do | |
3835 | { | |
3836 | sgot = alpha_elf_tdata(gotent->gotobj)->got; | |
3837 | BFD_ASSERT(sgot != NULL); | |
3838 | BFD_ASSERT(gotent->addend == 0); | |
3839 | ||
3840 | bfd_put_64 (output_bfd, plt_addr, | |
3841 | sgot->contents + gotent->got_offset); | |
3842 | ||
3843 | if (info->shared) | |
3844 | { | |
3845 | outrel.r_offset = (sgot->output_section->vma | |
3846 | + sgot->output_offset | |
3847 | + gotent->got_offset); | |
3848 | outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE); | |
28cfee26 | 3849 | outrel.r_addend = plt_addr; |
252b5132 RH |
3850 | |
3851 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
3852 | ((Elf64_External_Rela *) | |
3853 | srel->contents) | |
3854 | + srel->reloc_count++); | |
fe8bc63d | 3855 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count |
252b5132 RH |
3856 | <= srel->_cooked_size); |
3857 | } | |
3858 | ||
3859 | gotent = gotent->next; | |
3860 | } | |
3861 | while (gotent != NULL); | |
3862 | } | |
3863 | } | |
3864 | else if (alpha_elf_dynamic_symbol_p (h, info)) | |
3865 | { | |
3866 | /* Fill in the dynamic relocations for this symbol's .got entries. */ | |
3867 | asection *srel; | |
3868 | Elf_Internal_Rela outrel; | |
3869 | struct alpha_elf_got_entry *gotent; | |
3870 | ||
3871 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); | |
3872 | BFD_ASSERT (srel != NULL); | |
3873 | ||
3874 | outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_GLOB_DAT); | |
3875 | for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; | |
3876 | gotent != NULL; | |
3877 | gotent = gotent->next) | |
3878 | { | |
3879 | asection *sgot = alpha_elf_tdata (gotent->gotobj)->got; | |
3880 | outrel.r_offset = (sgot->output_section->vma | |
3881 | + sgot->output_offset | |
3882 | + gotent->got_offset); | |
3883 | outrel.r_addend = gotent->addend; | |
3884 | ||
3885 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
3886 | ((Elf64_External_Rela *)srel->contents | |
3887 | + srel->reloc_count++)); | |
fe8bc63d | 3888 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count |
252b5132 RH |
3889 | <= srel->_cooked_size); |
3890 | } | |
3891 | } | |
3892 | ||
3893 | /* Mark some specially defined symbols as absolute. */ | |
3894 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3895 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3896 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3897 | sym->st_shndx = SHN_ABS; | |
3898 | ||
3899 | return true; | |
3900 | } | |
3901 | ||
3902 | /* Finish up the dynamic sections. */ | |
3903 | ||
3904 | static boolean | |
3905 | elf64_alpha_finish_dynamic_sections (output_bfd, info) | |
3906 | bfd *output_bfd; | |
3907 | struct bfd_link_info *info; | |
3908 | { | |
3909 | bfd *dynobj; | |
3910 | asection *sdyn; | |
3911 | ||
3912 | dynobj = elf_hash_table (info)->dynobj; | |
3913 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3914 | ||
3915 | if (elf_hash_table (info)->dynamic_sections_created) | |
3916 | { | |
3917 | asection *splt; | |
3918 | Elf64_External_Dyn *dyncon, *dynconend; | |
3919 | ||
3920 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3921 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
3922 | ||
3923 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
3924 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
3925 | for (; dyncon < dynconend; dyncon++) | |
3926 | { | |
3927 | Elf_Internal_Dyn dyn; | |
3928 | const char *name; | |
3929 | asection *s; | |
3930 | ||
3931 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
3932 | ||
3933 | switch (dyn.d_tag) | |
3934 | { | |
3935 | case DT_PLTGOT: | |
3936 | name = ".plt"; | |
3937 | goto get_vma; | |
3938 | case DT_PLTRELSZ: | |
3939 | name = ".rela.plt"; | |
3940 | goto get_size; | |
3941 | case DT_JMPREL: | |
3942 | name = ".rela.plt"; | |
3943 | goto get_vma; | |
3944 | ||
3945 | case DT_RELASZ: | |
3946 | /* My interpretation of the TIS v1.1 ELF document indicates | |
3947 | that RELASZ should not include JMPREL. This is not what | |
3948 | the rest of the BFD does. It is, however, what the | |
3949 | glibc ld.so wants. Do this fixup here until we found | |
3950 | out who is right. */ | |
3951 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
3952 | if (s) | |
3953 | { | |
3954 | dyn.d_un.d_val -= | |
3955 | (s->_cooked_size ? s->_cooked_size : s->_raw_size); | |
3956 | } | |
3957 | break; | |
3958 | ||
3959 | get_vma: | |
3960 | s = bfd_get_section_by_name (output_bfd, name); | |
3961 | dyn.d_un.d_ptr = (s ? s->vma : 0); | |
3962 | break; | |
3963 | ||
3964 | get_size: | |
3965 | s = bfd_get_section_by_name (output_bfd, name); | |
3966 | dyn.d_un.d_val = | |
3967 | (s->_cooked_size ? s->_cooked_size : s->_raw_size); | |
3968 | break; | |
3969 | } | |
3970 | ||
3971 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3972 | } | |
3973 | ||
3974 | /* Initialize the PLT0 entry */ | |
3975 | if (splt->_raw_size > 0) | |
3976 | { | |
3977 | bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents); | |
3978 | bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4); | |
3979 | bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8); | |
3980 | bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12); | |
3981 | ||
3982 | /* The next two words will be filled in by ld.so */ | |
dc810e39 AM |
3983 | bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 16); |
3984 | bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 24); | |
252b5132 RH |
3985 | |
3986 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
3987 | PLT_HEADER_SIZE; | |
3988 | } | |
3989 | } | |
3990 | ||
252b5132 RH |
3991 | return true; |
3992 | } | |
3993 | ||
96e2734b RH |
3994 | /* We need to use a special link routine to handle the .mdebug section. |
3995 | We need to merge all instances of these sections together, not write | |
3996 | them all out sequentially. */ | |
252b5132 RH |
3997 | |
3998 | static boolean | |
3999 | elf64_alpha_final_link (abfd, info) | |
4000 | bfd *abfd; | |
4001 | struct bfd_link_info *info; | |
4002 | { | |
4003 | asection *o; | |
4004 | struct bfd_link_order *p; | |
96e2734b | 4005 | asection *mdebug_sec; |
252b5132 RH |
4006 | struct ecoff_debug_info debug; |
4007 | const struct ecoff_debug_swap *swap | |
4008 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
4009 | HDRR *symhdr = &debug.symbolic_header; | |
4010 | PTR mdebug_handle = NULL; | |
4011 | ||
96e2734b | 4012 | /* Go through the sections and collect the mdebug information. */ |
252b5132 | 4013 | mdebug_sec = NULL; |
252b5132 RH |
4014 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
4015 | { | |
252b5132 RH |
4016 | if (strcmp (o->name, ".mdebug") == 0) |
4017 | { | |
4018 | struct extsym_info einfo; | |
4019 | ||
4020 | /* We have found the .mdebug section in the output file. | |
4021 | Look through all the link_orders comprising it and merge | |
4022 | the information together. */ | |
4023 | symhdr->magic = swap->sym_magic; | |
4024 | /* FIXME: What should the version stamp be? */ | |
4025 | symhdr->vstamp = 0; | |
4026 | symhdr->ilineMax = 0; | |
4027 | symhdr->cbLine = 0; | |
4028 | symhdr->idnMax = 0; | |
4029 | symhdr->ipdMax = 0; | |
4030 | symhdr->isymMax = 0; | |
4031 | symhdr->ioptMax = 0; | |
4032 | symhdr->iauxMax = 0; | |
4033 | symhdr->issMax = 0; | |
4034 | symhdr->issExtMax = 0; | |
4035 | symhdr->ifdMax = 0; | |
4036 | symhdr->crfd = 0; | |
4037 | symhdr->iextMax = 0; | |
4038 | ||
4039 | /* We accumulate the debugging information itself in the | |
4040 | debug_info structure. */ | |
4041 | debug.line = NULL; | |
4042 | debug.external_dnr = NULL; | |
4043 | debug.external_pdr = NULL; | |
4044 | debug.external_sym = NULL; | |
4045 | debug.external_opt = NULL; | |
4046 | debug.external_aux = NULL; | |
4047 | debug.ss = NULL; | |
4048 | debug.ssext = debug.ssext_end = NULL; | |
4049 | debug.external_fdr = NULL; | |
4050 | debug.external_rfd = NULL; | |
4051 | debug.external_ext = debug.external_ext_end = NULL; | |
4052 | ||
4053 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); | |
4054 | if (mdebug_handle == (PTR) NULL) | |
4055 | return false; | |
4056 | ||
4057 | if (1) | |
4058 | { | |
4059 | asection *s; | |
4060 | EXTR esym; | |
52b9d213 | 4061 | bfd_vma last = 0; |
252b5132 RH |
4062 | unsigned int i; |
4063 | static const char * const name[] = | |
4064 | { | |
4065 | ".text", ".init", ".fini", ".data", | |
4066 | ".rodata", ".sdata", ".sbss", ".bss" | |
4067 | }; | |
4068 | static const int sc[] = { scText, scInit, scFini, scData, | |
4069 | scRData, scSData, scSBss, scBss }; | |
4070 | ||
4071 | esym.jmptbl = 0; | |
4072 | esym.cobol_main = 0; | |
4073 | esym.weakext = 0; | |
4074 | esym.reserved = 0; | |
4075 | esym.ifd = ifdNil; | |
4076 | esym.asym.iss = issNil; | |
4077 | esym.asym.st = stLocal; | |
4078 | esym.asym.reserved = 0; | |
4079 | esym.asym.index = indexNil; | |
4080 | for (i = 0; i < 8; i++) | |
4081 | { | |
4082 | esym.asym.sc = sc[i]; | |
4083 | s = bfd_get_section_by_name (abfd, name[i]); | |
4084 | if (s != NULL) | |
4085 | { | |
4086 | esym.asym.value = s->vma; | |
4087 | last = s->vma + s->_raw_size; | |
4088 | } | |
4089 | else | |
4090 | esym.asym.value = last; | |
4091 | ||
4092 | if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, | |
4093 | name[i], &esym)) | |
4094 | return false; | |
4095 | } | |
4096 | } | |
4097 | ||
4098 | for (p = o->link_order_head; | |
4099 | p != (struct bfd_link_order *) NULL; | |
4100 | p = p->next) | |
4101 | { | |
4102 | asection *input_section; | |
4103 | bfd *input_bfd; | |
4104 | const struct ecoff_debug_swap *input_swap; | |
4105 | struct ecoff_debug_info input_debug; | |
4106 | char *eraw_src; | |
4107 | char *eraw_end; | |
4108 | ||
4109 | if (p->type != bfd_indirect_link_order) | |
4110 | { | |
fd96f80f | 4111 | if (p->type == bfd_data_link_order) |
252b5132 RH |
4112 | continue; |
4113 | abort (); | |
4114 | } | |
4115 | ||
4116 | input_section = p->u.indirect.section; | |
4117 | input_bfd = input_section->owner; | |
4118 | ||
4119 | if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour | |
4120 | || (get_elf_backend_data (input_bfd) | |
4121 | ->elf_backend_ecoff_debug_swap) == NULL) | |
4122 | { | |
4123 | /* I don't know what a non ALPHA ELF bfd would be | |
4124 | doing with a .mdebug section, but I don't really | |
4125 | want to deal with it. */ | |
4126 | continue; | |
4127 | } | |
4128 | ||
4129 | input_swap = (get_elf_backend_data (input_bfd) | |
4130 | ->elf_backend_ecoff_debug_swap); | |
4131 | ||
4132 | BFD_ASSERT (p->size == input_section->_raw_size); | |
4133 | ||
4134 | /* The ECOFF linking code expects that we have already | |
4135 | read in the debugging information and set up an | |
4136 | ecoff_debug_info structure, so we do that now. */ | |
4137 | if (!elf64_alpha_read_ecoff_info (input_bfd, input_section, | |
4138 | &input_debug)) | |
4139 | return false; | |
4140 | ||
4141 | if (! (bfd_ecoff_debug_accumulate | |
4142 | (mdebug_handle, abfd, &debug, swap, input_bfd, | |
4143 | &input_debug, input_swap, info))) | |
4144 | return false; | |
4145 | ||
4146 | /* Loop through the external symbols. For each one with | |
4147 | interesting information, try to find the symbol in | |
4148 | the linker global hash table and save the information | |
4149 | for the output external symbols. */ | |
4150 | eraw_src = input_debug.external_ext; | |
4151 | eraw_end = (eraw_src | |
4152 | + (input_debug.symbolic_header.iextMax | |
4153 | * input_swap->external_ext_size)); | |
4154 | for (; | |
4155 | eraw_src < eraw_end; | |
4156 | eraw_src += input_swap->external_ext_size) | |
4157 | { | |
4158 | EXTR ext; | |
4159 | const char *name; | |
4160 | struct alpha_elf_link_hash_entry *h; | |
4161 | ||
4162 | (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext); | |
4163 | if (ext.asym.sc == scNil | |
4164 | || ext.asym.sc == scUndefined | |
4165 | || ext.asym.sc == scSUndefined) | |
4166 | continue; | |
4167 | ||
4168 | name = input_debug.ssext + ext.asym.iss; | |
4169 | h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info), | |
4170 | name, false, false, true); | |
4171 | if (h == NULL || h->esym.ifd != -2) | |
4172 | continue; | |
4173 | ||
4174 | if (ext.ifd != -1) | |
4175 | { | |
4176 | BFD_ASSERT (ext.ifd | |
4177 | < input_debug.symbolic_header.ifdMax); | |
4178 | ext.ifd = input_debug.ifdmap[ext.ifd]; | |
4179 | } | |
4180 | ||
4181 | h->esym = ext; | |
4182 | } | |
4183 | ||
4184 | /* Free up the information we just read. */ | |
4185 | free (input_debug.line); | |
4186 | free (input_debug.external_dnr); | |
4187 | free (input_debug.external_pdr); | |
4188 | free (input_debug.external_sym); | |
4189 | free (input_debug.external_opt); | |
4190 | free (input_debug.external_aux); | |
4191 | free (input_debug.ss); | |
4192 | free (input_debug.ssext); | |
4193 | free (input_debug.external_fdr); | |
4194 | free (input_debug.external_rfd); | |
4195 | free (input_debug.external_ext); | |
4196 | ||
4197 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
4198 | elf_link_input_bfd ignores this section. */ | |
4199 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
4200 | } | |
4201 | ||
252b5132 RH |
4202 | /* Build the external symbol information. */ |
4203 | einfo.abfd = abfd; | |
4204 | einfo.info = info; | |
4205 | einfo.debug = &debug; | |
4206 | einfo.swap = swap; | |
4207 | einfo.failed = false; | |
4208 | elf_link_hash_traverse (elf_hash_table (info), | |
4209 | elf64_alpha_output_extsym, | |
4210 | (PTR) &einfo); | |
4211 | if (einfo.failed) | |
4212 | return false; | |
4213 | ||
4214 | /* Set the size of the .mdebug section. */ | |
4215 | o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap); | |
4216 | ||
4217 | /* Skip this section later on (I don't think this currently | |
4218 | matters, but someday it might). */ | |
4219 | o->link_order_head = (struct bfd_link_order *) NULL; | |
4220 | ||
4221 | mdebug_sec = o; | |
4222 | } | |
252b5132 RH |
4223 | } |
4224 | ||
4225 | /* Invoke the regular ELF backend linker to do all the work. */ | |
4226 | if (! bfd_elf64_bfd_final_link (abfd, info)) | |
4227 | return false; | |
4228 | ||
4229 | /* Now write out the computed sections. */ | |
4230 | ||
4231 | /* The .got subsections... */ | |
4232 | { | |
4233 | bfd *i, *dynobj = elf_hash_table(info)->dynobj; | |
4234 | for (i = alpha_elf_hash_table(info)->got_list; | |
4235 | i != NULL; | |
4236 | i = alpha_elf_tdata(i)->got_link_next) | |
4237 | { | |
4238 | asection *sgot; | |
4239 | ||
4240 | /* elf_bfd_final_link already did everything in dynobj. */ | |
4241 | if (i == dynobj) | |
4242 | continue; | |
4243 | ||
4244 | sgot = alpha_elf_tdata(i)->got; | |
4245 | if (! bfd_set_section_contents (abfd, sgot->output_section, | |
dc810e39 AM |
4246 | sgot->contents, |
4247 | (file_ptr) sgot->output_offset, | |
252b5132 RH |
4248 | sgot->_raw_size)) |
4249 | return false; | |
4250 | } | |
4251 | } | |
4252 | ||
252b5132 RH |
4253 | if (mdebug_sec != (asection *) NULL) |
4254 | { | |
4255 | BFD_ASSERT (abfd->output_has_begun); | |
4256 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, | |
4257 | swap, info, | |
4258 | mdebug_sec->filepos)) | |
4259 | return false; | |
4260 | ||
4261 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); | |
4262 | } | |
4263 | ||
252b5132 RH |
4264 | return true; |
4265 | } | |
fcfbdf31 JJ |
4266 | |
4267 | static enum elf_reloc_type_class | |
f51e552e AM |
4268 | elf64_alpha_reloc_type_class (rela) |
4269 | const Elf_Internal_Rela *rela; | |
fcfbdf31 | 4270 | { |
f51e552e | 4271 | switch ((int) ELF64_R_TYPE (rela->r_info)) |
fcfbdf31 JJ |
4272 | { |
4273 | case R_ALPHA_RELATIVE: | |
4274 | return reloc_class_relative; | |
4275 | case R_ALPHA_JMP_SLOT: | |
4276 | return reloc_class_plt; | |
4277 | case R_ALPHA_COPY: | |
4278 | return reloc_class_copy; | |
4279 | default: | |
4280 | return reloc_class_normal; | |
4281 | } | |
4282 | } | |
252b5132 RH |
4283 | \f |
4284 | /* ECOFF swapping routines. These are used when dealing with the | |
4285 | .mdebug section, which is in the ECOFF debugging format. Copied | |
fe8bc63d | 4286 | from elf32-mips.c. */ |
252b5132 RH |
4287 | static const struct ecoff_debug_swap |
4288 | elf64_alpha_ecoff_debug_swap = | |
4289 | { | |
4290 | /* Symbol table magic number. */ | |
4291 | magicSym2, | |
4292 | /* Alignment of debugging information. E.g., 4. */ | |
4293 | 8, | |
4294 | /* Sizes of external symbolic information. */ | |
4295 | sizeof (struct hdr_ext), | |
4296 | sizeof (struct dnr_ext), | |
4297 | sizeof (struct pdr_ext), | |
4298 | sizeof (struct sym_ext), | |
4299 | sizeof (struct opt_ext), | |
4300 | sizeof (struct fdr_ext), | |
4301 | sizeof (struct rfd_ext), | |
4302 | sizeof (struct ext_ext), | |
4303 | /* Functions to swap in external symbolic data. */ | |
4304 | ecoff_swap_hdr_in, | |
4305 | ecoff_swap_dnr_in, | |
4306 | ecoff_swap_pdr_in, | |
4307 | ecoff_swap_sym_in, | |
4308 | ecoff_swap_opt_in, | |
4309 | ecoff_swap_fdr_in, | |
4310 | ecoff_swap_rfd_in, | |
4311 | ecoff_swap_ext_in, | |
4312 | _bfd_ecoff_swap_tir_in, | |
4313 | _bfd_ecoff_swap_rndx_in, | |
4314 | /* Functions to swap out external symbolic data. */ | |
4315 | ecoff_swap_hdr_out, | |
4316 | ecoff_swap_dnr_out, | |
4317 | ecoff_swap_pdr_out, | |
4318 | ecoff_swap_sym_out, | |
4319 | ecoff_swap_opt_out, | |
4320 | ecoff_swap_fdr_out, | |
4321 | ecoff_swap_rfd_out, | |
4322 | ecoff_swap_ext_out, | |
4323 | _bfd_ecoff_swap_tir_out, | |
4324 | _bfd_ecoff_swap_rndx_out, | |
4325 | /* Function to read in symbolic data. */ | |
4326 | elf64_alpha_read_ecoff_info | |
4327 | }; | |
4328 | \f | |
70bcb145 JW |
4329 | /* Use a non-standard hash bucket size of 8. */ |
4330 | ||
4331 | const struct elf_size_info alpha_elf_size_info = | |
4332 | { | |
4333 | sizeof (Elf64_External_Ehdr), | |
4334 | sizeof (Elf64_External_Phdr), | |
4335 | sizeof (Elf64_External_Shdr), | |
4336 | sizeof (Elf64_External_Rel), | |
4337 | sizeof (Elf64_External_Rela), | |
4338 | sizeof (Elf64_External_Sym), | |
4339 | sizeof (Elf64_External_Dyn), | |
4340 | sizeof (Elf_External_Note), | |
4341 | 8, | |
4342 | 1, | |
4343 | 64, 8, | |
4344 | ELFCLASS64, EV_CURRENT, | |
4345 | bfd_elf64_write_out_phdrs, | |
4346 | bfd_elf64_write_shdrs_and_ehdr, | |
4347 | bfd_elf64_write_relocs, | |
4348 | bfd_elf64_swap_symbol_out, | |
4349 | bfd_elf64_slurp_reloc_table, | |
4350 | bfd_elf64_slurp_symbol_table, | |
4351 | bfd_elf64_swap_dyn_in, | |
4352 | bfd_elf64_swap_dyn_out, | |
4353 | NULL, | |
4354 | NULL, | |
4355 | NULL, | |
4356 | NULL | |
4357 | }; | |
4358 | ||
252b5132 RH |
4359 | #define TARGET_LITTLE_SYM bfd_elf64_alpha_vec |
4360 | #define TARGET_LITTLE_NAME "elf64-alpha" | |
4361 | #define ELF_ARCH bfd_arch_alpha | |
56fc028e AJ |
4362 | #define ELF_MACHINE_CODE EM_ALPHA |
4363 | #define ELF_MAXPAGESIZE 0x10000 | |
252b5132 RH |
4364 | |
4365 | #define bfd_elf64_bfd_link_hash_table_create \ | |
4366 | elf64_alpha_bfd_link_hash_table_create | |
4367 | ||
4368 | #define bfd_elf64_bfd_reloc_type_lookup \ | |
4369 | elf64_alpha_bfd_reloc_type_lookup | |
4370 | #define elf_info_to_howto \ | |
4371 | elf64_alpha_info_to_howto | |
4372 | ||
4373 | #define bfd_elf64_mkobject \ | |
4374 | elf64_alpha_mkobject | |
4375 | #define elf_backend_object_p \ | |
4376 | elf64_alpha_object_p | |
4377 | ||
4378 | #define elf_backend_section_from_shdr \ | |
4379 | elf64_alpha_section_from_shdr | |
204692d7 RH |
4380 | #define elf_backend_section_flags \ |
4381 | elf64_alpha_section_flags | |
252b5132 RH |
4382 | #define elf_backend_fake_sections \ |
4383 | elf64_alpha_fake_sections | |
4384 | ||
4385 | #define bfd_elf64_bfd_is_local_label_name \ | |
4386 | elf64_alpha_is_local_label_name | |
4387 | #define bfd_elf64_find_nearest_line \ | |
4388 | elf64_alpha_find_nearest_line | |
4389 | #define bfd_elf64_bfd_relax_section \ | |
4390 | elf64_alpha_relax_section | |
4391 | ||
4392 | #define elf_backend_add_symbol_hook \ | |
4393 | elf64_alpha_add_symbol_hook | |
4394 | #define elf_backend_check_relocs \ | |
4395 | elf64_alpha_check_relocs | |
4396 | #define elf_backend_create_dynamic_sections \ | |
4397 | elf64_alpha_create_dynamic_sections | |
4398 | #define elf_backend_adjust_dynamic_symbol \ | |
4399 | elf64_alpha_adjust_dynamic_symbol | |
4400 | #define elf_backend_always_size_sections \ | |
4401 | elf64_alpha_always_size_sections | |
4402 | #define elf_backend_size_dynamic_sections \ | |
4403 | elf64_alpha_size_dynamic_sections | |
4404 | #define elf_backend_relocate_section \ | |
4405 | elf64_alpha_relocate_section | |
4406 | #define elf_backend_finish_dynamic_symbol \ | |
4407 | elf64_alpha_finish_dynamic_symbol | |
4408 | #define elf_backend_finish_dynamic_sections \ | |
4409 | elf64_alpha_finish_dynamic_sections | |
4410 | #define bfd_elf64_bfd_final_link \ | |
4411 | elf64_alpha_final_link | |
fcfbdf31 JJ |
4412 | #define elf_backend_reloc_type_class \ |
4413 | elf64_alpha_reloc_type_class | |
252b5132 RH |
4414 | |
4415 | #define elf_backend_ecoff_debug_swap \ | |
4416 | &elf64_alpha_ecoff_debug_swap | |
4417 | ||
70bcb145 JW |
4418 | #define elf_backend_size_info \ |
4419 | alpha_elf_size_info | |
4420 | ||
38b1a46c | 4421 | /* A few constants that determine how the .plt section is set up. */ |
252b5132 RH |
4422 | #define elf_backend_want_got_plt 0 |
4423 | #define elf_backend_plt_readonly 0 | |
4424 | #define elf_backend_want_plt_sym 1 | |
4425 | #define elf_backend_got_header_size 0 | |
4426 | #define elf_backend_plt_header_size PLT_HEADER_SIZE | |
4427 | ||
4428 | #include "elf64-target.h" |