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1 | /* Alpha specific support for 64-bit ELF | |
2 | Copyright (C) 1996-2020 Free Software Foundation, Inc. | |
3 | Contributed by Richard Henderson <rth@tamu.edu>. | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
22 | ||
23 | /* We need a published ABI spec for this. Until one comes out, don't | |
24 | assume this'll remain unchanged forever. */ | |
25 | ||
26 | #include "sysdep.h" | |
27 | #include "bfd.h" | |
28 | #include "libbfd.h" | |
29 | #include "elf-bfd.h" | |
30 | #include "ecoff-bfd.h" | |
31 | ||
32 | #include "elf/alpha.h" | |
33 | ||
34 | #define ALPHAECOFF | |
35 | ||
36 | #define NO_COFF_RELOCS | |
37 | #define NO_COFF_SYMBOLS | |
38 | #define NO_COFF_LINENOS | |
39 | ||
40 | /* Get the ECOFF swapping routines. Needed for the debug information. */ | |
41 | #include "coff/internal.h" | |
42 | #include "coff/sym.h" | |
43 | #include "coff/symconst.h" | |
44 | #include "coff/ecoff.h" | |
45 | #include "coff/alpha.h" | |
46 | #include "aout/ar.h" | |
47 | #include "libcoff.h" | |
48 | #include "libecoff.h" | |
49 | #define ECOFF_64 | |
50 | #include "ecoffswap.h" | |
51 | ||
52 | \f | |
53 | /* Instruction data for plt generation and relaxation. */ | |
54 | ||
55 | #define OP_LDA 0x08 | |
56 | #define OP_LDAH 0x09 | |
57 | #define OP_LDQ 0x29 | |
58 | #define OP_BR 0x30 | |
59 | #define OP_BSR 0x34 | |
60 | ||
61 | #define INSN_LDA (OP_LDA << 26) | |
62 | #define INSN_LDAH (OP_LDAH << 26) | |
63 | #define INSN_LDQ (OP_LDQ << 26) | |
64 | #define INSN_BR (OP_BR << 26) | |
65 | ||
66 | #define INSN_ADDQ 0x40000400 | |
67 | #define INSN_RDUNIQ 0x0000009e | |
68 | #define INSN_SUBQ 0x40000520 | |
69 | #define INSN_S4SUBQ 0x40000560 | |
70 | #define INSN_UNOP 0x2ffe0000 | |
71 | ||
72 | #define INSN_JSR 0x68004000 | |
73 | #define INSN_JMP 0x68000000 | |
74 | #define INSN_JSR_MASK 0xfc00c000 | |
75 | ||
76 | #define INSN_A(I,A) (I | (A << 21)) | |
77 | #define INSN_AB(I,A,B) (I | (A << 21) | (B << 16)) | |
78 | #define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C) | |
79 | #define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff)) | |
80 | #define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff)) | |
81 | ||
82 | /* PLT/GOT Stuff */ | |
83 | ||
84 | /* Set by ld emulation. Putting this into the link_info or hash structure | |
85 | is simply working too hard. */ | |
86 | #ifdef USE_SECUREPLT | |
87 | bfd_boolean elf64_alpha_use_secureplt = TRUE; | |
88 | #else | |
89 | bfd_boolean elf64_alpha_use_secureplt = FALSE; | |
90 | #endif | |
91 | ||
92 | #define OLD_PLT_HEADER_SIZE 32 | |
93 | #define OLD_PLT_ENTRY_SIZE 12 | |
94 | #define NEW_PLT_HEADER_SIZE 36 | |
95 | #define NEW_PLT_ENTRY_SIZE 4 | |
96 | ||
97 | #define PLT_HEADER_SIZE \ | |
98 | (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE) | |
99 | #define PLT_ENTRY_SIZE \ | |
100 | (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE) | |
101 | ||
102 | #define MAX_GOT_SIZE (64*1024) | |
103 | ||
104 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" | |
105 | \f | |
106 | ||
107 | /* Used to implement multiple .got subsections. */ | |
108 | struct alpha_elf_got_entry | |
109 | { | |
110 | struct alpha_elf_got_entry *next; | |
111 | ||
112 | /* Which .got subsection? */ | |
113 | bfd *gotobj; | |
114 | ||
115 | /* The addend in effect for this entry. */ | |
116 | bfd_vma addend; | |
117 | ||
118 | /* The .got offset for this entry. */ | |
119 | int got_offset; | |
120 | ||
121 | /* The .plt offset for this entry. */ | |
122 | int plt_offset; | |
123 | ||
124 | /* How many references to this entry? */ | |
125 | int use_count; | |
126 | ||
127 | /* The relocation type of this entry. */ | |
128 | unsigned char reloc_type; | |
129 | ||
130 | /* How a LITERAL is used. */ | |
131 | unsigned char flags; | |
132 | ||
133 | /* Have we initialized the dynamic relocation for this entry? */ | |
134 | unsigned char reloc_done; | |
135 | ||
136 | /* Have we adjusted this entry for SEC_MERGE? */ | |
137 | unsigned char reloc_xlated; | |
138 | }; | |
139 | ||
140 | struct alpha_elf_reloc_entry | |
141 | { | |
142 | struct alpha_elf_reloc_entry *next; | |
143 | ||
144 | /* Which .reloc section? */ | |
145 | asection *srel; | |
146 | ||
147 | /* What kind of relocation? */ | |
148 | unsigned int rtype; | |
149 | ||
150 | /* Is this against read-only section? */ | |
151 | unsigned int reltext : 1; | |
152 | ||
153 | /* How many did we find? */ | |
154 | unsigned long count; | |
155 | }; | |
156 | ||
157 | struct alpha_elf_link_hash_entry | |
158 | { | |
159 | struct elf_link_hash_entry root; | |
160 | ||
161 | /* External symbol information. */ | |
162 | EXTR esym; | |
163 | ||
164 | /* Cumulative flags for all the .got entries. */ | |
165 | int flags; | |
166 | ||
167 | /* Contexts in which a literal was referenced. */ | |
168 | #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01 | |
169 | #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02 | |
170 | #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04 | |
171 | #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08 | |
172 | #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10 | |
173 | #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20 | |
174 | #define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40 | |
175 | #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38 | |
176 | #define ALPHA_ELF_LINK_HASH_TLS_IE 0x80 | |
177 | ||
178 | /* Used to implement multiple .got subsections. */ | |
179 | struct alpha_elf_got_entry *got_entries; | |
180 | ||
181 | /* Used to count non-got, non-plt relocations for delayed sizing | |
182 | of relocation sections. */ | |
183 | struct alpha_elf_reloc_entry *reloc_entries; | |
184 | }; | |
185 | ||
186 | /* Alpha ELF linker hash table. */ | |
187 | ||
188 | struct alpha_elf_link_hash_table | |
189 | { | |
190 | struct elf_link_hash_table root; | |
191 | ||
192 | /* The head of a list of .got subsections linked through | |
193 | alpha_elf_tdata(abfd)->got_link_next. */ | |
194 | bfd *got_list; | |
195 | ||
196 | /* The most recent relax pass that we've seen. The GOTs | |
197 | should be regenerated if this doesn't match. */ | |
198 | int relax_trip; | |
199 | }; | |
200 | ||
201 | /* Look up an entry in a Alpha ELF linker hash table. */ | |
202 | ||
203 | #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \ | |
204 | ((struct alpha_elf_link_hash_entry *) \ | |
205 | elf_link_hash_lookup (&(table)->root, (string), (create), \ | |
206 | (copy), (follow))) | |
207 | ||
208 | /* Traverse a Alpha ELF linker hash table. */ | |
209 | ||
210 | #define alpha_elf_link_hash_traverse(table, func, info) \ | |
211 | (elf_link_hash_traverse \ | |
212 | (&(table)->root, \ | |
213 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ | |
214 | (info))) | |
215 | ||
216 | /* Get the Alpha ELF linker hash table from a link_info structure. */ | |
217 | ||
218 | #define alpha_elf_hash_table(p) \ | |
219 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ | |
220 | == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL) | |
221 | ||
222 | /* Get the object's symbols as our own entry type. */ | |
223 | ||
224 | #define alpha_elf_sym_hashes(abfd) \ | |
225 | ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd)) | |
226 | ||
227 | /* Should we do dynamic things to this symbol? This differs from the | |
228 | generic version in that we never need to consider function pointer | |
229 | equality wrt PLT entries -- we don't create a PLT entry if a symbol's | |
230 | address is ever taken. */ | |
231 | ||
232 | static inline bfd_boolean | |
233 | alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, | |
234 | struct bfd_link_info *info) | |
235 | { | |
236 | return _bfd_elf_dynamic_symbol_p (h, info, 0); | |
237 | } | |
238 | ||
239 | /* Create an entry in a Alpha ELF linker hash table. */ | |
240 | ||
241 | static struct bfd_hash_entry * | |
242 | elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry, | |
243 | struct bfd_hash_table *table, | |
244 | const char *string) | |
245 | { | |
246 | struct alpha_elf_link_hash_entry *ret = | |
247 | (struct alpha_elf_link_hash_entry *) entry; | |
248 | ||
249 | /* Allocate the structure if it has not already been allocated by a | |
250 | subclass. */ | |
251 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) | |
252 | ret = ((struct alpha_elf_link_hash_entry *) | |
253 | bfd_hash_allocate (table, | |
254 | sizeof (struct alpha_elf_link_hash_entry))); | |
255 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) | |
256 | return (struct bfd_hash_entry *) ret; | |
257 | ||
258 | /* Call the allocation method of the superclass. */ | |
259 | ret = ((struct alpha_elf_link_hash_entry *) | |
260 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
261 | table, string)); | |
262 | if (ret != (struct alpha_elf_link_hash_entry *) NULL) | |
263 | { | |
264 | /* Set local fields. */ | |
265 | memset (&ret->esym, 0, sizeof (EXTR)); | |
266 | /* We use -2 as a marker to indicate that the information has | |
267 | not been set. -1 means there is no associated ifd. */ | |
268 | ret->esym.ifd = -2; | |
269 | ret->flags = 0; | |
270 | ret->got_entries = NULL; | |
271 | ret->reloc_entries = NULL; | |
272 | } | |
273 | ||
274 | return (struct bfd_hash_entry *) ret; | |
275 | } | |
276 | ||
277 | /* Create a Alpha ELF linker hash table. */ | |
278 | ||
279 | static struct bfd_link_hash_table * | |
280 | elf64_alpha_bfd_link_hash_table_create (bfd *abfd) | |
281 | { | |
282 | struct alpha_elf_link_hash_table *ret; | |
283 | bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table); | |
284 | ||
285 | ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt); | |
286 | if (ret == (struct alpha_elf_link_hash_table *) NULL) | |
287 | return NULL; | |
288 | ||
289 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
290 | elf64_alpha_link_hash_newfunc, | |
291 | sizeof (struct alpha_elf_link_hash_entry), | |
292 | ALPHA_ELF_DATA)) | |
293 | { | |
294 | free (ret); | |
295 | return NULL; | |
296 | } | |
297 | ||
298 | return &ret->root.root; | |
299 | } | |
300 | \f | |
301 | /* Alpha ELF follows MIPS ELF in using a special find_nearest_line | |
302 | routine in order to handle the ECOFF debugging information. */ | |
303 | ||
304 | struct alpha_elf_find_line | |
305 | { | |
306 | struct ecoff_debug_info d; | |
307 | struct ecoff_find_line i; | |
308 | }; | |
309 | ||
310 | /* We have some private fields hanging off of the elf_tdata structure. */ | |
311 | ||
312 | struct alpha_elf_obj_tdata | |
313 | { | |
314 | struct elf_obj_tdata root; | |
315 | ||
316 | /* For every input file, these are the got entries for that object's | |
317 | local symbols. */ | |
318 | struct alpha_elf_got_entry ** local_got_entries; | |
319 | ||
320 | /* For every input file, this is the object that owns the got that | |
321 | this input file uses. */ | |
322 | bfd *gotobj; | |
323 | ||
324 | /* For every got, this is a linked list through the objects using this got */ | |
325 | bfd *in_got_link_next; | |
326 | ||
327 | /* For every got, this is a link to the next got subsegment. */ | |
328 | bfd *got_link_next; | |
329 | ||
330 | /* For every got, this is the section. */ | |
331 | asection *got; | |
332 | ||
333 | /* For every got, this is it's total number of words. */ | |
334 | int total_got_size; | |
335 | ||
336 | /* For every got, this is the sum of the number of words required | |
337 | to hold all of the member object's local got. */ | |
338 | int local_got_size; | |
339 | ||
340 | /* Used by elf64_alpha_find_nearest_line entry point. */ | |
341 | struct alpha_elf_find_line *find_line_info; | |
342 | ||
343 | }; | |
344 | ||
345 | #define alpha_elf_tdata(abfd) \ | |
346 | ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) | |
347 | ||
348 | #define is_alpha_elf(bfd) \ | |
349 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
350 | && elf_tdata (bfd) != NULL \ | |
351 | && elf_object_id (bfd) == ALPHA_ELF_DATA) | |
352 | ||
353 | static bfd_boolean | |
354 | elf64_alpha_mkobject (bfd *abfd) | |
355 | { | |
356 | return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata), | |
357 | ALPHA_ELF_DATA); | |
358 | } | |
359 | ||
360 | static bfd_boolean | |
361 | elf64_alpha_object_p (bfd *abfd) | |
362 | { | |
363 | /* Set the right machine number for an Alpha ELF file. */ | |
364 | return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); | |
365 | } | |
366 | \f | |
367 | /* A relocation function which doesn't do anything. */ | |
368 | ||
369 | static bfd_reloc_status_type | |
370 | elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, | |
371 | asymbol *sym ATTRIBUTE_UNUSED, | |
372 | void * data ATTRIBUTE_UNUSED, asection *sec, | |
373 | bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) | |
374 | { | |
375 | if (output_bfd) | |
376 | reloc->address += sec->output_offset; | |
377 | return bfd_reloc_ok; | |
378 | } | |
379 | ||
380 | /* A relocation function used for an unsupported reloc. */ | |
381 | ||
382 | static bfd_reloc_status_type | |
383 | elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, | |
384 | asymbol *sym ATTRIBUTE_UNUSED, | |
385 | void * data ATTRIBUTE_UNUSED, asection *sec, | |
386 | bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) | |
387 | { | |
388 | if (output_bfd) | |
389 | reloc->address += sec->output_offset; | |
390 | return bfd_reloc_notsupported; | |
391 | } | |
392 | ||
393 | /* Do the work of the GPDISP relocation. */ | |
394 | ||
395 | static bfd_reloc_status_type | |
396 | elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah, | |
397 | bfd_byte *p_lda) | |
398 | { | |
399 | bfd_reloc_status_type ret = bfd_reloc_ok; | |
400 | bfd_vma addend; | |
401 | unsigned long i_ldah, i_lda; | |
402 | ||
403 | i_ldah = bfd_get_32 (abfd, p_ldah); | |
404 | i_lda = bfd_get_32 (abfd, p_lda); | |
405 | ||
406 | /* Complain if the instructions are not correct. */ | |
407 | if (((i_ldah >> 26) & 0x3f) != 0x09 | |
408 | || ((i_lda >> 26) & 0x3f) != 0x08) | |
409 | ret = bfd_reloc_dangerous; | |
410 | ||
411 | /* Extract the user-supplied offset, mirroring the sign extensions | |
412 | that the instructions perform. */ | |
413 | addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); | |
414 | addend = (addend ^ 0x80008000) - 0x80008000; | |
415 | ||
416 | gpdisp += addend; | |
417 | ||
418 | if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000 | |
419 | || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000) | |
420 | ret = bfd_reloc_overflow; | |
421 | ||
422 | /* compensate for the sign extension again. */ | |
423 | i_ldah = ((i_ldah & 0xffff0000) | |
424 | | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff)); | |
425 | i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff); | |
426 | ||
427 | bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah); | |
428 | bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda); | |
429 | ||
430 | return ret; | |
431 | } | |
432 | ||
433 | /* The special function for the GPDISP reloc. */ | |
434 | ||
435 | static bfd_reloc_status_type | |
436 | elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry, | |
437 | asymbol *sym ATTRIBUTE_UNUSED, void * data, | |
438 | asection *input_section, bfd *output_bfd, | |
439 | char **err_msg) | |
440 | { | |
441 | bfd_reloc_status_type ret; | |
442 | bfd_vma gp, relocation; | |
443 | bfd_vma high_address; | |
444 | bfd_byte *p_ldah, *p_lda; | |
445 | ||
446 | /* Don't do anything if we're not doing a final link. */ | |
447 | if (output_bfd) | |
448 | { | |
449 | reloc_entry->address += input_section->output_offset; | |
450 | return bfd_reloc_ok; | |
451 | } | |
452 | ||
453 | high_address = bfd_get_section_limit (abfd, input_section); | |
454 | if (reloc_entry->address > high_address | |
455 | || reloc_entry->address + reloc_entry->addend > high_address) | |
456 | return bfd_reloc_outofrange; | |
457 | ||
458 | /* The gp used in the portion of the output object to which this | |
459 | input object belongs is cached on the input bfd. */ | |
460 | gp = _bfd_get_gp_value (abfd); | |
461 | ||
462 | relocation = (input_section->output_section->vma | |
463 | + input_section->output_offset | |
464 | + reloc_entry->address); | |
465 | ||
466 | p_ldah = (bfd_byte *) data + reloc_entry->address; | |
467 | p_lda = p_ldah + reloc_entry->addend; | |
468 | ||
469 | ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda); | |
470 | ||
471 | /* Complain if the instructions are not correct. */ | |
472 | if (ret == bfd_reloc_dangerous) | |
473 | *err_msg = _("GPDISP relocation did not find ldah and lda instructions"); | |
474 | ||
475 | return ret; | |
476 | } | |
477 | ||
478 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
479 | from smaller values. Start with zero, widen, *then* decrement. */ | |
480 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
481 | ||
482 | ||
483 | #define SKIP_HOWTO(N) \ | |
484 | HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0) | |
485 | ||
486 | static reloc_howto_type elf64_alpha_howto_table[] = | |
487 | { | |
488 | HOWTO (R_ALPHA_NONE, /* type */ | |
489 | 0, /* rightshift */ | |
490 | 3, /* size (0 = byte, 1 = short, 2 = long) */ | |
491 | 0, /* bitsize */ | |
492 | TRUE, /* pc_relative */ | |
493 | 0, /* bitpos */ | |
494 | complain_overflow_dont, /* complain_on_overflow */ | |
495 | elf64_alpha_reloc_nil, /* special_function */ | |
496 | "NONE", /* name */ | |
497 | FALSE, /* partial_inplace */ | |
498 | 0, /* src_mask */ | |
499 | 0, /* dst_mask */ | |
500 | TRUE), /* pcrel_offset */ | |
501 | ||
502 | /* A 32 bit reference to a symbol. */ | |
503 | HOWTO (R_ALPHA_REFLONG, /* type */ | |
504 | 0, /* rightshift */ | |
505 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
506 | 32, /* bitsize */ | |
507 | FALSE, /* pc_relative */ | |
508 | 0, /* bitpos */ | |
509 | complain_overflow_bitfield, /* complain_on_overflow */ | |
510 | bfd_elf_generic_reloc, /* special_function */ | |
511 | "REFLONG", /* name */ | |
512 | FALSE, /* partial_inplace */ | |
513 | 0xffffffff, /* src_mask */ | |
514 | 0xffffffff, /* dst_mask */ | |
515 | FALSE), /* pcrel_offset */ | |
516 | ||
517 | /* A 64 bit reference to a symbol. */ | |
518 | HOWTO (R_ALPHA_REFQUAD, /* type */ | |
519 | 0, /* rightshift */ | |
520 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
521 | 64, /* bitsize */ | |
522 | FALSE, /* pc_relative */ | |
523 | 0, /* bitpos */ | |
524 | complain_overflow_bitfield, /* complain_on_overflow */ | |
525 | bfd_elf_generic_reloc, /* special_function */ | |
526 | "REFQUAD", /* name */ | |
527 | FALSE, /* partial_inplace */ | |
528 | MINUS_ONE, /* src_mask */ | |
529 | MINUS_ONE, /* dst_mask */ | |
530 | FALSE), /* pcrel_offset */ | |
531 | ||
532 | /* A 32 bit GP relative offset. This is just like REFLONG except | |
533 | that when the value is used the value of the gp register will be | |
534 | added in. */ | |
535 | HOWTO (R_ALPHA_GPREL32, /* type */ | |
536 | 0, /* rightshift */ | |
537 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
538 | 32, /* bitsize */ | |
539 | FALSE, /* pc_relative */ | |
540 | 0, /* bitpos */ | |
541 | complain_overflow_bitfield, /* complain_on_overflow */ | |
542 | bfd_elf_generic_reloc, /* special_function */ | |
543 | "GPREL32", /* name */ | |
544 | FALSE, /* partial_inplace */ | |
545 | 0xffffffff, /* src_mask */ | |
546 | 0xffffffff, /* dst_mask */ | |
547 | FALSE), /* pcrel_offset */ | |
548 | ||
549 | /* Used for an instruction that refers to memory off the GP register. */ | |
550 | HOWTO (R_ALPHA_LITERAL, /* type */ | |
551 | 0, /* rightshift */ | |
552 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
553 | 16, /* bitsize */ | |
554 | FALSE, /* pc_relative */ | |
555 | 0, /* bitpos */ | |
556 | complain_overflow_signed, /* complain_on_overflow */ | |
557 | bfd_elf_generic_reloc, /* special_function */ | |
558 | "ELF_LITERAL", /* name */ | |
559 | FALSE, /* partial_inplace */ | |
560 | 0xffff, /* src_mask */ | |
561 | 0xffff, /* dst_mask */ | |
562 | FALSE), /* pcrel_offset */ | |
563 | ||
564 | /* This reloc only appears immediately following an ELF_LITERAL reloc. | |
565 | It identifies a use of the literal. The symbol index is special: | |
566 | 1 means the literal address is in the base register of a memory | |
567 | format instruction; 2 means the literal address is in the byte | |
568 | offset register of a byte-manipulation instruction; 3 means the | |
569 | literal address is in the target register of a jsr instruction. | |
570 | This does not actually do any relocation. */ | |
571 | HOWTO (R_ALPHA_LITUSE, /* type */ | |
572 | 0, /* rightshift */ | |
573 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
574 | 32, /* bitsize */ | |
575 | FALSE, /* pc_relative */ | |
576 | 0, /* bitpos */ | |
577 | complain_overflow_dont, /* complain_on_overflow */ | |
578 | elf64_alpha_reloc_nil, /* special_function */ | |
579 | "LITUSE", /* name */ | |
580 | FALSE, /* partial_inplace */ | |
581 | 0, /* src_mask */ | |
582 | 0, /* dst_mask */ | |
583 | FALSE), /* pcrel_offset */ | |
584 | ||
585 | /* Load the gp register. This is always used for a ldah instruction | |
586 | which loads the upper 16 bits of the gp register. The symbol | |
587 | index of the GPDISP instruction is an offset in bytes to the lda | |
588 | instruction that loads the lower 16 bits. The value to use for | |
589 | the relocation is the difference between the GP value and the | |
590 | current location; the load will always be done against a register | |
591 | holding the current address. | |
592 | ||
593 | NOTE: Unlike ECOFF, partial in-place relocation is not done. If | |
594 | any offset is present in the instructions, it is an offset from | |
595 | the register to the ldah instruction. This lets us avoid any | |
596 | stupid hackery like inventing a gp value to do partial relocation | |
597 | against. Also unlike ECOFF, we do the whole relocation off of | |
598 | the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd, | |
599 | space consuming bit, that, since all the information was present | |
600 | in the GPDISP_HI16 reloc. */ | |
601 | HOWTO (R_ALPHA_GPDISP, /* type */ | |
602 | 16, /* rightshift */ | |
603 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
604 | 16, /* bitsize */ | |
605 | FALSE, /* pc_relative */ | |
606 | 0, /* bitpos */ | |
607 | complain_overflow_dont, /* complain_on_overflow */ | |
608 | elf64_alpha_reloc_gpdisp, /* special_function */ | |
609 | "GPDISP", /* name */ | |
610 | FALSE, /* partial_inplace */ | |
611 | 0xffff, /* src_mask */ | |
612 | 0xffff, /* dst_mask */ | |
613 | TRUE), /* pcrel_offset */ | |
614 | ||
615 | /* A 21 bit branch. */ | |
616 | HOWTO (R_ALPHA_BRADDR, /* type */ | |
617 | 2, /* rightshift */ | |
618 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
619 | 21, /* bitsize */ | |
620 | TRUE, /* pc_relative */ | |
621 | 0, /* bitpos */ | |
622 | complain_overflow_signed, /* complain_on_overflow */ | |
623 | bfd_elf_generic_reloc, /* special_function */ | |
624 | "BRADDR", /* name */ | |
625 | FALSE, /* partial_inplace */ | |
626 | 0x1fffff, /* src_mask */ | |
627 | 0x1fffff, /* dst_mask */ | |
628 | TRUE), /* pcrel_offset */ | |
629 | ||
630 | /* A hint for a jump to a register. */ | |
631 | HOWTO (R_ALPHA_HINT, /* type */ | |
632 | 2, /* rightshift */ | |
633 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
634 | 14, /* bitsize */ | |
635 | TRUE, /* pc_relative */ | |
636 | 0, /* bitpos */ | |
637 | complain_overflow_dont, /* complain_on_overflow */ | |
638 | bfd_elf_generic_reloc, /* special_function */ | |
639 | "HINT", /* name */ | |
640 | FALSE, /* partial_inplace */ | |
641 | 0x3fff, /* src_mask */ | |
642 | 0x3fff, /* dst_mask */ | |
643 | TRUE), /* pcrel_offset */ | |
644 | ||
645 | /* 16 bit PC relative offset. */ | |
646 | HOWTO (R_ALPHA_SREL16, /* type */ | |
647 | 0, /* rightshift */ | |
648 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
649 | 16, /* bitsize */ | |
650 | TRUE, /* pc_relative */ | |
651 | 0, /* bitpos */ | |
652 | complain_overflow_signed, /* complain_on_overflow */ | |
653 | bfd_elf_generic_reloc, /* special_function */ | |
654 | "SREL16", /* name */ | |
655 | FALSE, /* partial_inplace */ | |
656 | 0xffff, /* src_mask */ | |
657 | 0xffff, /* dst_mask */ | |
658 | TRUE), /* pcrel_offset */ | |
659 | ||
660 | /* 32 bit PC relative offset. */ | |
661 | HOWTO (R_ALPHA_SREL32, /* type */ | |
662 | 0, /* rightshift */ | |
663 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
664 | 32, /* bitsize */ | |
665 | TRUE, /* pc_relative */ | |
666 | 0, /* bitpos */ | |
667 | complain_overflow_signed, /* complain_on_overflow */ | |
668 | bfd_elf_generic_reloc, /* special_function */ | |
669 | "SREL32", /* name */ | |
670 | FALSE, /* partial_inplace */ | |
671 | 0xffffffff, /* src_mask */ | |
672 | 0xffffffff, /* dst_mask */ | |
673 | TRUE), /* pcrel_offset */ | |
674 | ||
675 | /* A 64 bit PC relative offset. */ | |
676 | HOWTO (R_ALPHA_SREL64, /* type */ | |
677 | 0, /* rightshift */ | |
678 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
679 | 64, /* bitsize */ | |
680 | TRUE, /* pc_relative */ | |
681 | 0, /* bitpos */ | |
682 | complain_overflow_signed, /* complain_on_overflow */ | |
683 | bfd_elf_generic_reloc, /* special_function */ | |
684 | "SREL64", /* name */ | |
685 | FALSE, /* partial_inplace */ | |
686 | MINUS_ONE, /* src_mask */ | |
687 | MINUS_ONE, /* dst_mask */ | |
688 | TRUE), /* pcrel_offset */ | |
689 | ||
690 | /* Skip 12 - 16; deprecated ECOFF relocs. */ | |
691 | SKIP_HOWTO (12), | |
692 | SKIP_HOWTO (13), | |
693 | SKIP_HOWTO (14), | |
694 | SKIP_HOWTO (15), | |
695 | SKIP_HOWTO (16), | |
696 | ||
697 | /* The high 16 bits of the displacement from GP to the target. */ | |
698 | HOWTO (R_ALPHA_GPRELHIGH, | |
699 | 0, /* rightshift */ | |
700 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
701 | 16, /* bitsize */ | |
702 | FALSE, /* pc_relative */ | |
703 | 0, /* bitpos */ | |
704 | complain_overflow_signed, /* complain_on_overflow */ | |
705 | bfd_elf_generic_reloc, /* special_function */ | |
706 | "GPRELHIGH", /* name */ | |
707 | FALSE, /* partial_inplace */ | |
708 | 0xffff, /* src_mask */ | |
709 | 0xffff, /* dst_mask */ | |
710 | FALSE), /* pcrel_offset */ | |
711 | ||
712 | /* The low 16 bits of the displacement from GP to the target. */ | |
713 | HOWTO (R_ALPHA_GPRELLOW, | |
714 | 0, /* rightshift */ | |
715 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
716 | 16, /* bitsize */ | |
717 | FALSE, /* pc_relative */ | |
718 | 0, /* bitpos */ | |
719 | complain_overflow_dont, /* complain_on_overflow */ | |
720 | bfd_elf_generic_reloc, /* special_function */ | |
721 | "GPRELLOW", /* name */ | |
722 | FALSE, /* partial_inplace */ | |
723 | 0xffff, /* src_mask */ | |
724 | 0xffff, /* dst_mask */ | |
725 | FALSE), /* pcrel_offset */ | |
726 | ||
727 | /* A 16-bit displacement from the GP to the target. */ | |
728 | HOWTO (R_ALPHA_GPREL16, | |
729 | 0, /* rightshift */ | |
730 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
731 | 16, /* bitsize */ | |
732 | FALSE, /* pc_relative */ | |
733 | 0, /* bitpos */ | |
734 | complain_overflow_signed, /* complain_on_overflow */ | |
735 | bfd_elf_generic_reloc, /* special_function */ | |
736 | "GPREL16", /* name */ | |
737 | FALSE, /* partial_inplace */ | |
738 | 0xffff, /* src_mask */ | |
739 | 0xffff, /* dst_mask */ | |
740 | FALSE), /* pcrel_offset */ | |
741 | ||
742 | /* Skip 20 - 23; deprecated ECOFF relocs. */ | |
743 | SKIP_HOWTO (20), | |
744 | SKIP_HOWTO (21), | |
745 | SKIP_HOWTO (22), | |
746 | SKIP_HOWTO (23), | |
747 | ||
748 | /* Misc ELF relocations. */ | |
749 | ||
750 | /* A dynamic relocation to copy the target into our .dynbss section. */ | |
751 | /* Not generated, as all Alpha objects use PIC, so it is not needed. It | |
752 | is present because every other ELF has one, but should not be used | |
753 | because .dynbss is an ugly thing. */ | |
754 | HOWTO (R_ALPHA_COPY, | |
755 | 0, | |
756 | 0, | |
757 | 0, | |
758 | FALSE, | |
759 | 0, | |
760 | complain_overflow_dont, | |
761 | bfd_elf_generic_reloc, | |
762 | "COPY", | |
763 | FALSE, | |
764 | 0, | |
765 | 0, | |
766 | TRUE), | |
767 | ||
768 | /* A dynamic relocation for a .got entry. */ | |
769 | HOWTO (R_ALPHA_GLOB_DAT, | |
770 | 0, | |
771 | 0, | |
772 | 0, | |
773 | FALSE, | |
774 | 0, | |
775 | complain_overflow_dont, | |
776 | bfd_elf_generic_reloc, | |
777 | "GLOB_DAT", | |
778 | FALSE, | |
779 | 0, | |
780 | 0, | |
781 | TRUE), | |
782 | ||
783 | /* A dynamic relocation for a .plt entry. */ | |
784 | HOWTO (R_ALPHA_JMP_SLOT, | |
785 | 0, | |
786 | 0, | |
787 | 0, | |
788 | FALSE, | |
789 | 0, | |
790 | complain_overflow_dont, | |
791 | bfd_elf_generic_reloc, | |
792 | "JMP_SLOT", | |
793 | FALSE, | |
794 | 0, | |
795 | 0, | |
796 | TRUE), | |
797 | ||
798 | /* A dynamic relocation to add the base of the DSO to a 64-bit field. */ | |
799 | HOWTO (R_ALPHA_RELATIVE, | |
800 | 0, | |
801 | 0, | |
802 | 0, | |
803 | FALSE, | |
804 | 0, | |
805 | complain_overflow_dont, | |
806 | bfd_elf_generic_reloc, | |
807 | "RELATIVE", | |
808 | FALSE, | |
809 | 0, | |
810 | 0, | |
811 | TRUE), | |
812 | ||
813 | /* A 21 bit branch that adjusts for gp loads. */ | |
814 | HOWTO (R_ALPHA_BRSGP, /* type */ | |
815 | 2, /* rightshift */ | |
816 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
817 | 21, /* bitsize */ | |
818 | TRUE, /* pc_relative */ | |
819 | 0, /* bitpos */ | |
820 | complain_overflow_signed, /* complain_on_overflow */ | |
821 | bfd_elf_generic_reloc, /* special_function */ | |
822 | "BRSGP", /* name */ | |
823 | FALSE, /* partial_inplace */ | |
824 | 0x1fffff, /* src_mask */ | |
825 | 0x1fffff, /* dst_mask */ | |
826 | TRUE), /* pcrel_offset */ | |
827 | ||
828 | /* Creates a tls_index for the symbol in the got. */ | |
829 | HOWTO (R_ALPHA_TLSGD, /* type */ | |
830 | 0, /* rightshift */ | |
831 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
832 | 16, /* bitsize */ | |
833 | FALSE, /* pc_relative */ | |
834 | 0, /* bitpos */ | |
835 | complain_overflow_signed, /* complain_on_overflow */ | |
836 | bfd_elf_generic_reloc, /* special_function */ | |
837 | "TLSGD", /* name */ | |
838 | FALSE, /* partial_inplace */ | |
839 | 0xffff, /* src_mask */ | |
840 | 0xffff, /* dst_mask */ | |
841 | FALSE), /* pcrel_offset */ | |
842 | ||
843 | /* Creates a tls_index for the (current) module in the got. */ | |
844 | HOWTO (R_ALPHA_TLSLDM, /* type */ | |
845 | 0, /* rightshift */ | |
846 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
847 | 16, /* bitsize */ | |
848 | FALSE, /* pc_relative */ | |
849 | 0, /* bitpos */ | |
850 | complain_overflow_signed, /* complain_on_overflow */ | |
851 | bfd_elf_generic_reloc, /* special_function */ | |
852 | "TLSLDM", /* name */ | |
853 | FALSE, /* partial_inplace */ | |
854 | 0xffff, /* src_mask */ | |
855 | 0xffff, /* dst_mask */ | |
856 | FALSE), /* pcrel_offset */ | |
857 | ||
858 | /* A dynamic relocation for a DTP module entry. */ | |
859 | HOWTO (R_ALPHA_DTPMOD64, /* type */ | |
860 | 0, /* rightshift */ | |
861 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
862 | 64, /* bitsize */ | |
863 | FALSE, /* pc_relative */ | |
864 | 0, /* bitpos */ | |
865 | complain_overflow_bitfield, /* complain_on_overflow */ | |
866 | bfd_elf_generic_reloc, /* special_function */ | |
867 | "DTPMOD64", /* name */ | |
868 | FALSE, /* partial_inplace */ | |
869 | MINUS_ONE, /* src_mask */ | |
870 | MINUS_ONE, /* dst_mask */ | |
871 | FALSE), /* pcrel_offset */ | |
872 | ||
873 | /* Creates a 64-bit offset in the got for the displacement | |
874 | from DTP to the target. */ | |
875 | HOWTO (R_ALPHA_GOTDTPREL, /* type */ | |
876 | 0, /* rightshift */ | |
877 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
878 | 16, /* bitsize */ | |
879 | FALSE, /* pc_relative */ | |
880 | 0, /* bitpos */ | |
881 | complain_overflow_signed, /* complain_on_overflow */ | |
882 | bfd_elf_generic_reloc, /* special_function */ | |
883 | "GOTDTPREL", /* name */ | |
884 | FALSE, /* partial_inplace */ | |
885 | 0xffff, /* src_mask */ | |
886 | 0xffff, /* dst_mask */ | |
887 | FALSE), /* pcrel_offset */ | |
888 | ||
889 | /* A dynamic relocation for a displacement from DTP to the target. */ | |
890 | HOWTO (R_ALPHA_DTPREL64, /* type */ | |
891 | 0, /* rightshift */ | |
892 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
893 | 64, /* bitsize */ | |
894 | FALSE, /* pc_relative */ | |
895 | 0, /* bitpos */ | |
896 | complain_overflow_bitfield, /* complain_on_overflow */ | |
897 | bfd_elf_generic_reloc, /* special_function */ | |
898 | "DTPREL64", /* name */ | |
899 | FALSE, /* partial_inplace */ | |
900 | MINUS_ONE, /* src_mask */ | |
901 | MINUS_ONE, /* dst_mask */ | |
902 | FALSE), /* pcrel_offset */ | |
903 | ||
904 | /* The high 16 bits of the displacement from DTP to the target. */ | |
905 | HOWTO (R_ALPHA_DTPRELHI, /* type */ | |
906 | 0, /* rightshift */ | |
907 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
908 | 16, /* bitsize */ | |
909 | FALSE, /* pc_relative */ | |
910 | 0, /* bitpos */ | |
911 | complain_overflow_signed, /* complain_on_overflow */ | |
912 | bfd_elf_generic_reloc, /* special_function */ | |
913 | "DTPRELHI", /* name */ | |
914 | FALSE, /* partial_inplace */ | |
915 | 0xffff, /* src_mask */ | |
916 | 0xffff, /* dst_mask */ | |
917 | FALSE), /* pcrel_offset */ | |
918 | ||
919 | /* The low 16 bits of the displacement from DTP to the target. */ | |
920 | HOWTO (R_ALPHA_DTPRELLO, /* type */ | |
921 | 0, /* rightshift */ | |
922 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
923 | 16, /* bitsize */ | |
924 | FALSE, /* pc_relative */ | |
925 | 0, /* bitpos */ | |
926 | complain_overflow_dont, /* complain_on_overflow */ | |
927 | bfd_elf_generic_reloc, /* special_function */ | |
928 | "DTPRELLO", /* name */ | |
929 | FALSE, /* partial_inplace */ | |
930 | 0xffff, /* src_mask */ | |
931 | 0xffff, /* dst_mask */ | |
932 | FALSE), /* pcrel_offset */ | |
933 | ||
934 | /* A 16-bit displacement from DTP to the target. */ | |
935 | HOWTO (R_ALPHA_DTPREL16, /* type */ | |
936 | 0, /* rightshift */ | |
937 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
938 | 16, /* bitsize */ | |
939 | FALSE, /* pc_relative */ | |
940 | 0, /* bitpos */ | |
941 | complain_overflow_signed, /* complain_on_overflow */ | |
942 | bfd_elf_generic_reloc, /* special_function */ | |
943 | "DTPREL16", /* name */ | |
944 | FALSE, /* partial_inplace */ | |
945 | 0xffff, /* src_mask */ | |
946 | 0xffff, /* dst_mask */ | |
947 | FALSE), /* pcrel_offset */ | |
948 | ||
949 | /* Creates a 64-bit offset in the got for the displacement | |
950 | from TP to the target. */ | |
951 | HOWTO (R_ALPHA_GOTTPREL, /* type */ | |
952 | 0, /* rightshift */ | |
953 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
954 | 16, /* bitsize */ | |
955 | FALSE, /* pc_relative */ | |
956 | 0, /* bitpos */ | |
957 | complain_overflow_signed, /* complain_on_overflow */ | |
958 | bfd_elf_generic_reloc, /* special_function */ | |
959 | "GOTTPREL", /* name */ | |
960 | FALSE, /* partial_inplace */ | |
961 | 0xffff, /* src_mask */ | |
962 | 0xffff, /* dst_mask */ | |
963 | FALSE), /* pcrel_offset */ | |
964 | ||
965 | /* A dynamic relocation for a displacement from TP to the target. */ | |
966 | HOWTO (R_ALPHA_TPREL64, /* type */ | |
967 | 0, /* rightshift */ | |
968 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
969 | 64, /* bitsize */ | |
970 | FALSE, /* pc_relative */ | |
971 | 0, /* bitpos */ | |
972 | complain_overflow_bitfield, /* complain_on_overflow */ | |
973 | bfd_elf_generic_reloc, /* special_function */ | |
974 | "TPREL64", /* name */ | |
975 | FALSE, /* partial_inplace */ | |
976 | MINUS_ONE, /* src_mask */ | |
977 | MINUS_ONE, /* dst_mask */ | |
978 | FALSE), /* pcrel_offset */ | |
979 | ||
980 | /* The high 16 bits of the displacement from TP to the target. */ | |
981 | HOWTO (R_ALPHA_TPRELHI, /* type */ | |
982 | 0, /* rightshift */ | |
983 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
984 | 16, /* bitsize */ | |
985 | FALSE, /* pc_relative */ | |
986 | 0, /* bitpos */ | |
987 | complain_overflow_signed, /* complain_on_overflow */ | |
988 | bfd_elf_generic_reloc, /* special_function */ | |
989 | "TPRELHI", /* name */ | |
990 | FALSE, /* partial_inplace */ | |
991 | 0xffff, /* src_mask */ | |
992 | 0xffff, /* dst_mask */ | |
993 | FALSE), /* pcrel_offset */ | |
994 | ||
995 | /* The low 16 bits of the displacement from TP to the target. */ | |
996 | HOWTO (R_ALPHA_TPRELLO, /* type */ | |
997 | 0, /* rightshift */ | |
998 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
999 | 16, /* bitsize */ | |
1000 | FALSE, /* pc_relative */ | |
1001 | 0, /* bitpos */ | |
1002 | complain_overflow_dont, /* complain_on_overflow */ | |
1003 | bfd_elf_generic_reloc, /* special_function */ | |
1004 | "TPRELLO", /* name */ | |
1005 | FALSE, /* partial_inplace */ | |
1006 | 0xffff, /* src_mask */ | |
1007 | 0xffff, /* dst_mask */ | |
1008 | FALSE), /* pcrel_offset */ | |
1009 | ||
1010 | /* A 16-bit displacement from TP to the target. */ | |
1011 | HOWTO (R_ALPHA_TPREL16, /* type */ | |
1012 | 0, /* rightshift */ | |
1013 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1014 | 16, /* bitsize */ | |
1015 | FALSE, /* pc_relative */ | |
1016 | 0, /* bitpos */ | |
1017 | complain_overflow_signed, /* complain_on_overflow */ | |
1018 | bfd_elf_generic_reloc, /* special_function */ | |
1019 | "TPREL16", /* name */ | |
1020 | FALSE, /* partial_inplace */ | |
1021 | 0xffff, /* src_mask */ | |
1022 | 0xffff, /* dst_mask */ | |
1023 | FALSE), /* pcrel_offset */ | |
1024 | }; | |
1025 | ||
1026 | /* A mapping from BFD reloc types to Alpha ELF reloc types. */ | |
1027 | ||
1028 | struct elf_reloc_map | |
1029 | { | |
1030 | bfd_reloc_code_real_type bfd_reloc_val; | |
1031 | int elf_reloc_val; | |
1032 | }; | |
1033 | ||
1034 | static const struct elf_reloc_map elf64_alpha_reloc_map[] = | |
1035 | { | |
1036 | {BFD_RELOC_NONE, R_ALPHA_NONE}, | |
1037 | {BFD_RELOC_32, R_ALPHA_REFLONG}, | |
1038 | {BFD_RELOC_64, R_ALPHA_REFQUAD}, | |
1039 | {BFD_RELOC_CTOR, R_ALPHA_REFQUAD}, | |
1040 | {BFD_RELOC_GPREL32, R_ALPHA_GPREL32}, | |
1041 | {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL}, | |
1042 | {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE}, | |
1043 | {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP}, | |
1044 | {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR}, | |
1045 | {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT}, | |
1046 | {BFD_RELOC_16_PCREL, R_ALPHA_SREL16}, | |
1047 | {BFD_RELOC_32_PCREL, R_ALPHA_SREL32}, | |
1048 | {BFD_RELOC_64_PCREL, R_ALPHA_SREL64}, | |
1049 | {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH}, | |
1050 | {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW}, | |
1051 | {BFD_RELOC_GPREL16, R_ALPHA_GPREL16}, | |
1052 | {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP}, | |
1053 | {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD}, | |
1054 | {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM}, | |
1055 | {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64}, | |
1056 | {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL}, | |
1057 | {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64}, | |
1058 | {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI}, | |
1059 | {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO}, | |
1060 | {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16}, | |
1061 | {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL}, | |
1062 | {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64}, | |
1063 | {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI}, | |
1064 | {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO}, | |
1065 | {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16}, | |
1066 | }; | |
1067 | ||
1068 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
1069 | ||
1070 | static reloc_howto_type * | |
1071 | elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
1072 | bfd_reloc_code_real_type code) | |
1073 | { | |
1074 | const struct elf_reloc_map *i, *e; | |
1075 | i = e = elf64_alpha_reloc_map; | |
1076 | e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map); | |
1077 | for (; i != e; ++i) | |
1078 | { | |
1079 | if (i->bfd_reloc_val == code) | |
1080 | return &elf64_alpha_howto_table[i->elf_reloc_val]; | |
1081 | } | |
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | static reloc_howto_type * | |
1086 | elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
1087 | const char *r_name) | |
1088 | { | |
1089 | unsigned int i; | |
1090 | ||
1091 | for (i = 0; | |
1092 | i < (sizeof (elf64_alpha_howto_table) | |
1093 | / sizeof (elf64_alpha_howto_table[0])); | |
1094 | i++) | |
1095 | if (elf64_alpha_howto_table[i].name != NULL | |
1096 | && strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0) | |
1097 | return &elf64_alpha_howto_table[i]; | |
1098 | ||
1099 | return NULL; | |
1100 | } | |
1101 | ||
1102 | /* Given an Alpha ELF reloc type, fill in an arelent structure. */ | |
1103 | ||
1104 | static bfd_boolean | |
1105 | elf64_alpha_info_to_howto (bfd *abfd, arelent *cache_ptr, | |
1106 | Elf_Internal_Rela *dst) | |
1107 | { | |
1108 | unsigned r_type = ELF64_R_TYPE(dst->r_info); | |
1109 | ||
1110 | if (r_type >= R_ALPHA_max) | |
1111 | { | |
1112 | /* xgettext:c-format */ | |
1113 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), | |
1114 | abfd, r_type); | |
1115 | bfd_set_error (bfd_error_bad_value); | |
1116 | return FALSE; | |
1117 | } | |
1118 | cache_ptr->howto = &elf64_alpha_howto_table[r_type]; | |
1119 | return TRUE; | |
1120 | } | |
1121 | ||
1122 | /* These two relocations create a two-word entry in the got. */ | |
1123 | #define alpha_got_entry_size(r_type) \ | |
1124 | (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8) | |
1125 | ||
1126 | /* This is PT_TLS segment p_vaddr. */ | |
1127 | #define alpha_get_dtprel_base(info) \ | |
1128 | (elf_hash_table (info)->tls_sec->vma) | |
1129 | ||
1130 | /* Main program TLS (whose template starts at PT_TLS p_vaddr) | |
1131 | is assigned offset round(16, PT_TLS p_align). */ | |
1132 | #define alpha_get_tprel_base(info) \ | |
1133 | (elf_hash_table (info)->tls_sec->vma \ | |
1134 | - align_power ((bfd_vma) 16, \ | |
1135 | elf_hash_table (info)->tls_sec->alignment_power)) | |
1136 | \f | |
1137 | /* Handle an Alpha specific section when reading an object file. This | |
1138 | is called when bfd_section_from_shdr finds a section with an unknown | |
1139 | type. | |
1140 | FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure | |
1141 | how to. */ | |
1142 | ||
1143 | static bfd_boolean | |
1144 | elf64_alpha_section_from_shdr (bfd *abfd, | |
1145 | Elf_Internal_Shdr *hdr, | |
1146 | const char *name, | |
1147 | int shindex) | |
1148 | { | |
1149 | asection *newsect; | |
1150 | ||
1151 | /* There ought to be a place to keep ELF backend specific flags, but | |
1152 | at the moment there isn't one. We just keep track of the | |
1153 | sections by their name, instead. Fortunately, the ABI gives | |
1154 | suggested names for all the MIPS specific sections, so we will | |
1155 | probably get away with this. */ | |
1156 | switch (hdr->sh_type) | |
1157 | { | |
1158 | case SHT_ALPHA_DEBUG: | |
1159 | if (strcmp (name, ".mdebug") != 0) | |
1160 | return FALSE; | |
1161 | break; | |
1162 | default: | |
1163 | return FALSE; | |
1164 | } | |
1165 | ||
1166 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) | |
1167 | return FALSE; | |
1168 | newsect = hdr->bfd_section; | |
1169 | ||
1170 | if (hdr->sh_type == SHT_ALPHA_DEBUG) | |
1171 | { | |
1172 | if (!bfd_set_section_flags (newsect, | |
1173 | bfd_section_flags (newsect) | SEC_DEBUGGING)) | |
1174 | return FALSE; | |
1175 | } | |
1176 | ||
1177 | return TRUE; | |
1178 | } | |
1179 | ||
1180 | /* Convert Alpha specific section flags to bfd internal section flags. */ | |
1181 | ||
1182 | static bfd_boolean | |
1183 | elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) | |
1184 | { | |
1185 | if (hdr->sh_flags & SHF_ALPHA_GPREL) | |
1186 | *flags |= SEC_SMALL_DATA; | |
1187 | ||
1188 | return TRUE; | |
1189 | } | |
1190 | ||
1191 | /* Set the correct type for an Alpha ELF section. We do this by the | |
1192 | section name, which is a hack, but ought to work. */ | |
1193 | ||
1194 | static bfd_boolean | |
1195 | elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec) | |
1196 | { | |
1197 | register const char *name; | |
1198 | ||
1199 | name = bfd_section_name (sec); | |
1200 | ||
1201 | if (strcmp (name, ".mdebug") == 0) | |
1202 | { | |
1203 | hdr->sh_type = SHT_ALPHA_DEBUG; | |
1204 | /* In a shared object on Irix 5.3, the .mdebug section has an | |
1205 | entsize of 0. FIXME: Does this matter? */ | |
1206 | if ((abfd->flags & DYNAMIC) != 0 ) | |
1207 | hdr->sh_entsize = 0; | |
1208 | else | |
1209 | hdr->sh_entsize = 1; | |
1210 | } | |
1211 | else if ((sec->flags & SEC_SMALL_DATA) | |
1212 | || strcmp (name, ".sdata") == 0 | |
1213 | || strcmp (name, ".sbss") == 0 | |
1214 | || strcmp (name, ".lit4") == 0 | |
1215 | || strcmp (name, ".lit8") == 0) | |
1216 | hdr->sh_flags |= SHF_ALPHA_GPREL; | |
1217 | ||
1218 | return TRUE; | |
1219 | } | |
1220 | ||
1221 | /* Hook called by the linker routine which adds symbols from an object | |
1222 | file. We use it to put .comm items in .sbss, and not .bss. */ | |
1223 | ||
1224 | static bfd_boolean | |
1225 | elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, | |
1226 | Elf_Internal_Sym *sym, | |
1227 | const char **namep ATTRIBUTE_UNUSED, | |
1228 | flagword *flagsp ATTRIBUTE_UNUSED, | |
1229 | asection **secp, bfd_vma *valp) | |
1230 | { | |
1231 | if (sym->st_shndx == SHN_COMMON | |
1232 | && !bfd_link_relocatable (info) | |
1233 | && sym->st_size <= elf_gp_size (abfd)) | |
1234 | { | |
1235 | /* Common symbols less than or equal to -G nn bytes are | |
1236 | automatically put into .sbss. */ | |
1237 | ||
1238 | asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); | |
1239 | ||
1240 | if (scomm == NULL) | |
1241 | { | |
1242 | scomm = bfd_make_section_with_flags (abfd, ".scommon", | |
1243 | (SEC_ALLOC | |
1244 | | SEC_IS_COMMON | |
1245 | | SEC_LINKER_CREATED)); | |
1246 | if (scomm == NULL) | |
1247 | return FALSE; | |
1248 | } | |
1249 | ||
1250 | *secp = scomm; | |
1251 | *valp = sym->st_size; | |
1252 | } | |
1253 | ||
1254 | return TRUE; | |
1255 | } | |
1256 | ||
1257 | /* Create the .got section. */ | |
1258 | ||
1259 | static bfd_boolean | |
1260 | elf64_alpha_create_got_section (bfd *abfd, | |
1261 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
1262 | { | |
1263 | flagword flags; | |
1264 | asection *s; | |
1265 | ||
1266 | if (! is_alpha_elf (abfd)) | |
1267 | return FALSE; | |
1268 | ||
1269 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1270 | | SEC_LINKER_CREATED); | |
1271 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); | |
1272 | if (s == NULL | |
1273 | || !bfd_set_section_alignment (s, 3)) | |
1274 | return FALSE; | |
1275 | ||
1276 | alpha_elf_tdata (abfd)->got = s; | |
1277 | ||
1278 | /* Make sure the object's gotobj is set to itself so that we default | |
1279 | to every object with its own .got. We'll merge .gots later once | |
1280 | we've collected each object's info. */ | |
1281 | alpha_elf_tdata (abfd)->gotobj = abfd; | |
1282 | ||
1283 | return TRUE; | |
1284 | } | |
1285 | ||
1286 | /* Create all the dynamic sections. */ | |
1287 | ||
1288 | static bfd_boolean | |
1289 | elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) | |
1290 | { | |
1291 | asection *s; | |
1292 | flagword flags; | |
1293 | struct elf_link_hash_entry *h; | |
1294 | ||
1295 | if (! is_alpha_elf (abfd)) | |
1296 | return FALSE; | |
1297 | ||
1298 | /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ | |
1299 | ||
1300 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1301 | | SEC_LINKER_CREATED | |
1302 | | (elf64_alpha_use_secureplt ? SEC_READONLY : 0)); | |
1303 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags); | |
1304 | elf_hash_table (info)->splt = s; | |
1305 | if (s == NULL || ! bfd_set_section_alignment (s, 4)) | |
1306 | return FALSE; | |
1307 | ||
1308 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the | |
1309 | .plt section. */ | |
1310 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
1311 | "_PROCEDURE_LINKAGE_TABLE_"); | |
1312 | elf_hash_table (info)->hplt = h; | |
1313 | if (h == NULL) | |
1314 | return FALSE; | |
1315 | ||
1316 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1317 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1318 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags); | |
1319 | elf_hash_table (info)->srelplt = s; | |
1320 | if (s == NULL || ! bfd_set_section_alignment (s, 3)) | |
1321 | return FALSE; | |
1322 | ||
1323 | if (elf64_alpha_use_secureplt) | |
1324 | { | |
1325 | flags = SEC_ALLOC | SEC_LINKER_CREATED; | |
1326 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); | |
1327 | elf_hash_table (info)->sgotplt = s; | |
1328 | if (s == NULL || ! bfd_set_section_alignment (s, 3)) | |
1329 | return FALSE; | |
1330 | } | |
1331 | ||
1332 | /* We may or may not have created a .got section for this object, but | |
1333 | we definitely havn't done the rest of the work. */ | |
1334 | ||
1335 | if (alpha_elf_tdata(abfd)->gotobj == NULL) | |
1336 | { | |
1337 | if (!elf64_alpha_create_got_section (abfd, info)) | |
1338 | return FALSE; | |
1339 | } | |
1340 | ||
1341 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1342 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1343 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags); | |
1344 | elf_hash_table (info)->srelgot = s; | |
1345 | if (s == NULL | |
1346 | || !bfd_set_section_alignment (s, 3)) | |
1347 | return FALSE; | |
1348 | ||
1349 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the | |
1350 | dynobj's .got section. We don't do this in the linker script | |
1351 | because we don't want to define the symbol if we are not creating | |
1352 | a global offset table. */ | |
1353 | h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got, | |
1354 | "_GLOBAL_OFFSET_TABLE_"); | |
1355 | elf_hash_table (info)->hgot = h; | |
1356 | if (h == NULL) | |
1357 | return FALSE; | |
1358 | ||
1359 | return TRUE; | |
1360 | } | |
1361 | \f | |
1362 | /* Read ECOFF debugging information from a .mdebug section into a | |
1363 | ecoff_debug_info structure. */ | |
1364 | ||
1365 | static bfd_boolean | |
1366 | elf64_alpha_read_ecoff_info (bfd *abfd, asection *section, | |
1367 | struct ecoff_debug_info *debug) | |
1368 | { | |
1369 | HDRR *symhdr; | |
1370 | const struct ecoff_debug_swap *swap; | |
1371 | char *ext_hdr = NULL; | |
1372 | ||
1373 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
1374 | memset (debug, 0, sizeof (*debug)); | |
1375 | ||
1376 | ext_hdr = (char *) bfd_malloc (swap->external_hdr_size); | |
1377 | if (ext_hdr == NULL && swap->external_hdr_size != 0) | |
1378 | goto error_return; | |
1379 | ||
1380 | if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, | |
1381 | swap->external_hdr_size)) | |
1382 | goto error_return; | |
1383 | ||
1384 | symhdr = &debug->symbolic_header; | |
1385 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); | |
1386 | ||
1387 | /* The symbolic header contains absolute file offsets and sizes to | |
1388 | read. */ | |
1389 | #define READ(ptr, offset, count, size, type) \ | |
1390 | if (symhdr->count == 0) \ | |
1391 | debug->ptr = NULL; \ | |
1392 | else \ | |
1393 | { \ | |
1394 | bfd_size_type amt = (bfd_size_type) size * symhdr->count; \ | |
1395 | debug->ptr = (type) bfd_malloc (amt); \ | |
1396 | if (debug->ptr == NULL) \ | |
1397 | goto error_return; \ | |
1398 | if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ | |
1399 | || bfd_bread (debug->ptr, amt, abfd) != amt) \ | |
1400 | goto error_return; \ | |
1401 | } | |
1402 | ||
1403 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); | |
1404 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *); | |
1405 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *); | |
1406 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *); | |
1407 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *); | |
1408 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), | |
1409 | union aux_ext *); | |
1410 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); | |
1411 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); | |
1412 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *); | |
1413 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *); | |
1414 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *); | |
1415 | #undef READ | |
1416 | ||
1417 | debug->fdr = NULL; | |
1418 | ||
1419 | return TRUE; | |
1420 | ||
1421 | error_return: | |
1422 | if (ext_hdr != NULL) | |
1423 | free (ext_hdr); | |
1424 | if (debug->line != NULL) | |
1425 | free (debug->line); | |
1426 | if (debug->external_dnr != NULL) | |
1427 | free (debug->external_dnr); | |
1428 | if (debug->external_pdr != NULL) | |
1429 | free (debug->external_pdr); | |
1430 | if (debug->external_sym != NULL) | |
1431 | free (debug->external_sym); | |
1432 | if (debug->external_opt != NULL) | |
1433 | free (debug->external_opt); | |
1434 | if (debug->external_aux != NULL) | |
1435 | free (debug->external_aux); | |
1436 | if (debug->ss != NULL) | |
1437 | free (debug->ss); | |
1438 | if (debug->ssext != NULL) | |
1439 | free (debug->ssext); | |
1440 | if (debug->external_fdr != NULL) | |
1441 | free (debug->external_fdr); | |
1442 | if (debug->external_rfd != NULL) | |
1443 | free (debug->external_rfd); | |
1444 | if (debug->external_ext != NULL) | |
1445 | free (debug->external_ext); | |
1446 | return FALSE; | |
1447 | } | |
1448 | ||
1449 | /* Alpha ELF local labels start with '$'. */ | |
1450 | ||
1451 | static bfd_boolean | |
1452 | elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) | |
1453 | { | |
1454 | return name[0] == '$'; | |
1455 | } | |
1456 | ||
1457 | static bfd_boolean | |
1458 | elf64_alpha_find_nearest_line (bfd *abfd, asymbol **symbols, | |
1459 | asection *section, bfd_vma offset, | |
1460 | const char **filename_ptr, | |
1461 | const char **functionname_ptr, | |
1462 | unsigned int *line_ptr, | |
1463 | unsigned int *discriminator_ptr) | |
1464 | { | |
1465 | asection *msec; | |
1466 | ||
1467 | if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, | |
1468 | filename_ptr, functionname_ptr, | |
1469 | line_ptr, discriminator_ptr, | |
1470 | dwarf_debug_sections, | |
1471 | &elf_tdata (abfd)->dwarf2_find_line_info) | |
1472 | == 1) | |
1473 | return TRUE; | |
1474 | ||
1475 | msec = bfd_get_section_by_name (abfd, ".mdebug"); | |
1476 | if (msec != NULL) | |
1477 | { | |
1478 | flagword origflags; | |
1479 | struct alpha_elf_find_line *fi; | |
1480 | const struct ecoff_debug_swap * const swap = | |
1481 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
1482 | ||
1483 | /* If we are called during a link, alpha_elf_final_link may have | |
1484 | cleared the SEC_HAS_CONTENTS field. We force it back on here | |
1485 | if appropriate (which it normally will be). */ | |
1486 | origflags = msec->flags; | |
1487 | if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) | |
1488 | msec->flags |= SEC_HAS_CONTENTS; | |
1489 | ||
1490 | fi = alpha_elf_tdata (abfd)->find_line_info; | |
1491 | if (fi == NULL) | |
1492 | { | |
1493 | bfd_size_type external_fdr_size; | |
1494 | char *fraw_src; | |
1495 | char *fraw_end; | |
1496 | struct fdr *fdr_ptr; | |
1497 | bfd_size_type amt = sizeof (struct alpha_elf_find_line); | |
1498 | ||
1499 | fi = (struct alpha_elf_find_line *) bfd_zalloc (abfd, amt); | |
1500 | if (fi == NULL) | |
1501 | { | |
1502 | msec->flags = origflags; | |
1503 | return FALSE; | |
1504 | } | |
1505 | ||
1506 | if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) | |
1507 | { | |
1508 | msec->flags = origflags; | |
1509 | return FALSE; | |
1510 | } | |
1511 | ||
1512 | /* Swap in the FDR information. */ | |
1513 | amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr); | |
1514 | fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt); | |
1515 | if (fi->d.fdr == NULL) | |
1516 | { | |
1517 | msec->flags = origflags; | |
1518 | return FALSE; | |
1519 | } | |
1520 | external_fdr_size = swap->external_fdr_size; | |
1521 | fdr_ptr = fi->d.fdr; | |
1522 | fraw_src = (char *) fi->d.external_fdr; | |
1523 | fraw_end = (fraw_src | |
1524 | + fi->d.symbolic_header.ifdMax * external_fdr_size); | |
1525 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) | |
1526 | (*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr); | |
1527 | ||
1528 | alpha_elf_tdata (abfd)->find_line_info = fi; | |
1529 | ||
1530 | /* Note that we don't bother to ever free this information. | |
1531 | find_nearest_line is either called all the time, as in | |
1532 | objdump -l, so the information should be saved, or it is | |
1533 | rarely called, as in ld error messages, so the memory | |
1534 | wasted is unimportant. Still, it would probably be a | |
1535 | good idea for free_cached_info to throw it away. */ | |
1536 | } | |
1537 | ||
1538 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, | |
1539 | &fi->i, filename_ptr, functionname_ptr, | |
1540 | line_ptr)) | |
1541 | { | |
1542 | msec->flags = origflags; | |
1543 | return TRUE; | |
1544 | } | |
1545 | ||
1546 | msec->flags = origflags; | |
1547 | } | |
1548 | ||
1549 | /* Fall back on the generic ELF find_nearest_line routine. */ | |
1550 | ||
1551 | return _bfd_elf_find_nearest_line (abfd, symbols, section, offset, | |
1552 | filename_ptr, functionname_ptr, | |
1553 | line_ptr, discriminator_ptr); | |
1554 | } | |
1555 | \f | |
1556 | /* Structure used to pass information to alpha_elf_output_extsym. */ | |
1557 | ||
1558 | struct extsym_info | |
1559 | { | |
1560 | bfd *abfd; | |
1561 | struct bfd_link_info *info; | |
1562 | struct ecoff_debug_info *debug; | |
1563 | const struct ecoff_debug_swap *swap; | |
1564 | bfd_boolean failed; | |
1565 | }; | |
1566 | ||
1567 | static bfd_boolean | |
1568 | elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, void * data) | |
1569 | { | |
1570 | struct extsym_info *einfo = (struct extsym_info *) data; | |
1571 | bfd_boolean strip; | |
1572 | asection *sec, *output_section; | |
1573 | ||
1574 | if (h->root.indx == -2) | |
1575 | strip = FALSE; | |
1576 | else if ((h->root.def_dynamic | |
1577 | || h->root.ref_dynamic | |
1578 | || h->root.root.type == bfd_link_hash_new) | |
1579 | && !h->root.def_regular | |
1580 | && !h->root.ref_regular) | |
1581 | strip = TRUE; | |
1582 | else if (einfo->info->strip == strip_all | |
1583 | || (einfo->info->strip == strip_some | |
1584 | && bfd_hash_lookup (einfo->info->keep_hash, | |
1585 | h->root.root.root.string, | |
1586 | FALSE, FALSE) == NULL)) | |
1587 | strip = TRUE; | |
1588 | else | |
1589 | strip = FALSE; | |
1590 | ||
1591 | if (strip) | |
1592 | return TRUE; | |
1593 | ||
1594 | if (h->esym.ifd == -2) | |
1595 | { | |
1596 | h->esym.jmptbl = 0; | |
1597 | h->esym.cobol_main = 0; | |
1598 | h->esym.weakext = 0; | |
1599 | h->esym.reserved = 0; | |
1600 | h->esym.ifd = ifdNil; | |
1601 | h->esym.asym.value = 0; | |
1602 | h->esym.asym.st = stGlobal; | |
1603 | ||
1604 | if (h->root.root.type != bfd_link_hash_defined | |
1605 | && h->root.root.type != bfd_link_hash_defweak) | |
1606 | h->esym.asym.sc = scAbs; | |
1607 | else | |
1608 | { | |
1609 | const char *name; | |
1610 | ||
1611 | sec = h->root.root.u.def.section; | |
1612 | output_section = sec->output_section; | |
1613 | ||
1614 | /* When making a shared library and symbol h is the one from | |
1615 | the another shared library, OUTPUT_SECTION may be null. */ | |
1616 | if (output_section == NULL) | |
1617 | h->esym.asym.sc = scUndefined; | |
1618 | else | |
1619 | { | |
1620 | name = bfd_section_name (output_section); | |
1621 | ||
1622 | if (strcmp (name, ".text") == 0) | |
1623 | h->esym.asym.sc = scText; | |
1624 | else if (strcmp (name, ".data") == 0) | |
1625 | h->esym.asym.sc = scData; | |
1626 | else if (strcmp (name, ".sdata") == 0) | |
1627 | h->esym.asym.sc = scSData; | |
1628 | else if (strcmp (name, ".rodata") == 0 | |
1629 | || strcmp (name, ".rdata") == 0) | |
1630 | h->esym.asym.sc = scRData; | |
1631 | else if (strcmp (name, ".bss") == 0) | |
1632 | h->esym.asym.sc = scBss; | |
1633 | else if (strcmp (name, ".sbss") == 0) | |
1634 | h->esym.asym.sc = scSBss; | |
1635 | else if (strcmp (name, ".init") == 0) | |
1636 | h->esym.asym.sc = scInit; | |
1637 | else if (strcmp (name, ".fini") == 0) | |
1638 | h->esym.asym.sc = scFini; | |
1639 | else | |
1640 | h->esym.asym.sc = scAbs; | |
1641 | } | |
1642 | } | |
1643 | ||
1644 | h->esym.asym.reserved = 0; | |
1645 | h->esym.asym.index = indexNil; | |
1646 | } | |
1647 | ||
1648 | if (h->root.root.type == bfd_link_hash_common) | |
1649 | h->esym.asym.value = h->root.root.u.c.size; | |
1650 | else if (h->root.root.type == bfd_link_hash_defined | |
1651 | || h->root.root.type == bfd_link_hash_defweak) | |
1652 | { | |
1653 | if (h->esym.asym.sc == scCommon) | |
1654 | h->esym.asym.sc = scBss; | |
1655 | else if (h->esym.asym.sc == scSCommon) | |
1656 | h->esym.asym.sc = scSBss; | |
1657 | ||
1658 | sec = h->root.root.u.def.section; | |
1659 | output_section = sec->output_section; | |
1660 | if (output_section != NULL) | |
1661 | h->esym.asym.value = (h->root.root.u.def.value | |
1662 | + sec->output_offset | |
1663 | + output_section->vma); | |
1664 | else | |
1665 | h->esym.asym.value = 0; | |
1666 | } | |
1667 | ||
1668 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, | |
1669 | h->root.root.root.string, | |
1670 | &h->esym)) | |
1671 | { | |
1672 | einfo->failed = TRUE; | |
1673 | return FALSE; | |
1674 | } | |
1675 | ||
1676 | return TRUE; | |
1677 | } | |
1678 | \f | |
1679 | /* Search for and possibly create a got entry. */ | |
1680 | ||
1681 | static struct alpha_elf_got_entry * | |
1682 | get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h, | |
1683 | unsigned long r_type, unsigned long r_symndx, | |
1684 | bfd_vma r_addend) | |
1685 | { | |
1686 | struct alpha_elf_got_entry *gotent; | |
1687 | struct alpha_elf_got_entry **slot; | |
1688 | ||
1689 | if (h) | |
1690 | slot = &h->got_entries; | |
1691 | else | |
1692 | { | |
1693 | /* This is a local .got entry -- record for merge. */ | |
1694 | ||
1695 | struct alpha_elf_got_entry **local_got_entries; | |
1696 | ||
1697 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; | |
1698 | if (!local_got_entries) | |
1699 | { | |
1700 | bfd_size_type size; | |
1701 | Elf_Internal_Shdr *symtab_hdr; | |
1702 | ||
1703 | symtab_hdr = &elf_tdata(abfd)->symtab_hdr; | |
1704 | size = symtab_hdr->sh_info; | |
1705 | size *= sizeof (struct alpha_elf_got_entry *); | |
1706 | ||
1707 | local_got_entries | |
1708 | = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size); | |
1709 | if (!local_got_entries) | |
1710 | return NULL; | |
1711 | ||
1712 | alpha_elf_tdata (abfd)->local_got_entries = local_got_entries; | |
1713 | } | |
1714 | ||
1715 | slot = &local_got_entries[r_symndx]; | |
1716 | } | |
1717 | ||
1718 | for (gotent = *slot; gotent ; gotent = gotent->next) | |
1719 | if (gotent->gotobj == abfd | |
1720 | && gotent->reloc_type == r_type | |
1721 | && gotent->addend == r_addend) | |
1722 | break; | |
1723 | ||
1724 | if (!gotent) | |
1725 | { | |
1726 | int entry_size; | |
1727 | bfd_size_type amt; | |
1728 | ||
1729 | amt = sizeof (struct alpha_elf_got_entry); | |
1730 | gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt); | |
1731 | if (!gotent) | |
1732 | return NULL; | |
1733 | ||
1734 | gotent->gotobj = abfd; | |
1735 | gotent->addend = r_addend; | |
1736 | gotent->got_offset = -1; | |
1737 | gotent->plt_offset = -1; | |
1738 | gotent->use_count = 1; | |
1739 | gotent->reloc_type = r_type; | |
1740 | gotent->reloc_done = 0; | |
1741 | gotent->reloc_xlated = 0; | |
1742 | ||
1743 | gotent->next = *slot; | |
1744 | *slot = gotent; | |
1745 | ||
1746 | entry_size = alpha_got_entry_size (r_type); | |
1747 | alpha_elf_tdata (abfd)->total_got_size += entry_size; | |
1748 | if (!h) | |
1749 | alpha_elf_tdata(abfd)->local_got_size += entry_size; | |
1750 | } | |
1751 | else | |
1752 | gotent->use_count += 1; | |
1753 | ||
1754 | return gotent; | |
1755 | } | |
1756 | ||
1757 | static bfd_boolean | |
1758 | elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah) | |
1759 | { | |
1760 | return ((ah->root.type == STT_FUNC | |
1761 | || ah->root.root.type == bfd_link_hash_undefweak | |
1762 | || ah->root.root.type == bfd_link_hash_undefined) | |
1763 | && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0 | |
1764 | && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0); | |
1765 | } | |
1766 | ||
1767 | /* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset. | |
1768 | Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE | |
1769 | as is. On the other hand, elf-eh-frame.c processing requires .eh_frame | |
1770 | relocs to be sorted. */ | |
1771 | ||
1772 | static bfd_boolean | |
1773 | elf64_alpha_sort_relocs_p (asection *sec) | |
1774 | { | |
1775 | return (sec->flags & SEC_CODE) == 0; | |
1776 | } | |
1777 | ||
1778 | ||
1779 | /* Handle dynamic relocations when doing an Alpha ELF link. */ | |
1780 | ||
1781 | static bfd_boolean | |
1782 | elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info, | |
1783 | asection *sec, const Elf_Internal_Rela *relocs) | |
1784 | { | |
1785 | bfd *dynobj; | |
1786 | asection *sreloc; | |
1787 | Elf_Internal_Shdr *symtab_hdr; | |
1788 | struct alpha_elf_link_hash_entry **sym_hashes; | |
1789 | const Elf_Internal_Rela *rel, *relend; | |
1790 | bfd_size_type amt; | |
1791 | ||
1792 | if (bfd_link_relocatable (info)) | |
1793 | return TRUE; | |
1794 | ||
1795 | /* Don't do anything special with non-loaded, non-alloced sections. | |
1796 | In particular, any relocs in such sections should not affect GOT | |
1797 | and PLT reference counting (ie. we don't allow them to create GOT | |
1798 | or PLT entries), there's no possibility or desire to optimize TLS | |
1799 | relocs, and there's not much point in propagating relocs to shared | |
1800 | libs that the dynamic linker won't relocate. */ | |
1801 | if ((sec->flags & SEC_ALLOC) == 0) | |
1802 | return TRUE; | |
1803 | ||
1804 | BFD_ASSERT (is_alpha_elf (abfd)); | |
1805 | ||
1806 | dynobj = elf_hash_table (info)->dynobj; | |
1807 | if (dynobj == NULL) | |
1808 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
1809 | ||
1810 | sreloc = NULL; | |
1811 | symtab_hdr = &elf_symtab_hdr (abfd); | |
1812 | sym_hashes = alpha_elf_sym_hashes (abfd); | |
1813 | ||
1814 | relend = relocs + sec->reloc_count; | |
1815 | for (rel = relocs; rel < relend; ++rel) | |
1816 | { | |
1817 | enum { | |
1818 | NEED_GOT = 1, | |
1819 | NEED_GOT_ENTRY = 2, | |
1820 | NEED_DYNREL = 4 | |
1821 | }; | |
1822 | ||
1823 | unsigned long r_symndx, r_type; | |
1824 | struct alpha_elf_link_hash_entry *h; | |
1825 | unsigned int gotent_flags; | |
1826 | bfd_boolean maybe_dynamic; | |
1827 | unsigned int need; | |
1828 | bfd_vma addend; | |
1829 | ||
1830 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1831 | if (r_symndx < symtab_hdr->sh_info) | |
1832 | h = NULL; | |
1833 | else | |
1834 | { | |
1835 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1836 | ||
1837 | while (h->root.root.type == bfd_link_hash_indirect | |
1838 | || h->root.root.type == bfd_link_hash_warning) | |
1839 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
1840 | ||
1841 | /* PR15323, ref flags aren't set for references in the same | |
1842 | object. */ | |
1843 | h->root.ref_regular = 1; | |
1844 | } | |
1845 | ||
1846 | /* We can only get preliminary data on whether a symbol is | |
1847 | locally or externally defined, as not all of the input files | |
1848 | have yet been processed. Do something with what we know, as | |
1849 | this may help reduce memory usage and processing time later. */ | |
1850 | maybe_dynamic = FALSE; | |
1851 | if (h && ((bfd_link_pic (info) | |
1852 | && (!info->symbolic | |
1853 | || info->unresolved_syms_in_shared_libs == RM_IGNORE)) | |
1854 | || !h->root.def_regular | |
1855 | || h->root.root.type == bfd_link_hash_defweak)) | |
1856 | maybe_dynamic = TRUE; | |
1857 | ||
1858 | need = 0; | |
1859 | gotent_flags = 0; | |
1860 | r_type = ELF64_R_TYPE (rel->r_info); | |
1861 | addend = rel->r_addend; | |
1862 | ||
1863 | switch (r_type) | |
1864 | { | |
1865 | case R_ALPHA_LITERAL: | |
1866 | need = NEED_GOT | NEED_GOT_ENTRY; | |
1867 | ||
1868 | /* Remember how this literal is used from its LITUSEs. | |
1869 | This will be important when it comes to decide if we can | |
1870 | create a .plt entry for a function symbol. */ | |
1871 | while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE) | |
1872 | if (rel->r_addend >= 1 && rel->r_addend <= 6) | |
1873 | gotent_flags |= 1 << rel->r_addend; | |
1874 | --rel; | |
1875 | ||
1876 | /* No LITUSEs -- presumably the address is used somehow. */ | |
1877 | if (gotent_flags == 0) | |
1878 | gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR; | |
1879 | break; | |
1880 | ||
1881 | case R_ALPHA_GPDISP: | |
1882 | case R_ALPHA_GPREL16: | |
1883 | case R_ALPHA_GPREL32: | |
1884 | case R_ALPHA_GPRELHIGH: | |
1885 | case R_ALPHA_GPRELLOW: | |
1886 | case R_ALPHA_BRSGP: | |
1887 | need = NEED_GOT; | |
1888 | break; | |
1889 | ||
1890 | case R_ALPHA_REFLONG: | |
1891 | case R_ALPHA_REFQUAD: | |
1892 | if (bfd_link_pic (info) || maybe_dynamic) | |
1893 | need = NEED_DYNREL; | |
1894 | break; | |
1895 | ||
1896 | case R_ALPHA_TLSLDM: | |
1897 | /* The symbol for a TLSLDM reloc is ignored. Collapse the | |
1898 | reloc to the STN_UNDEF (0) symbol so that they all match. */ | |
1899 | r_symndx = STN_UNDEF; | |
1900 | h = 0; | |
1901 | maybe_dynamic = FALSE; | |
1902 | /* FALLTHRU */ | |
1903 | ||
1904 | case R_ALPHA_TLSGD: | |
1905 | case R_ALPHA_GOTDTPREL: | |
1906 | need = NEED_GOT | NEED_GOT_ENTRY; | |
1907 | break; | |
1908 | ||
1909 | case R_ALPHA_GOTTPREL: | |
1910 | need = NEED_GOT | NEED_GOT_ENTRY; | |
1911 | gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE; | |
1912 | if (bfd_link_pic (info)) | |
1913 | info->flags |= DF_STATIC_TLS; | |
1914 | break; | |
1915 | ||
1916 | case R_ALPHA_TPREL64: | |
1917 | if (bfd_link_dll (info)) | |
1918 | { | |
1919 | info->flags |= DF_STATIC_TLS; | |
1920 | need = NEED_DYNREL; | |
1921 | } | |
1922 | else if (maybe_dynamic) | |
1923 | need = NEED_DYNREL; | |
1924 | break; | |
1925 | } | |
1926 | ||
1927 | if (need & NEED_GOT) | |
1928 | { | |
1929 | if (alpha_elf_tdata(abfd)->gotobj == NULL) | |
1930 | { | |
1931 | if (!elf64_alpha_create_got_section (abfd, info)) | |
1932 | return FALSE; | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | if (need & NEED_GOT_ENTRY) | |
1937 | { | |
1938 | struct alpha_elf_got_entry *gotent; | |
1939 | ||
1940 | gotent = get_got_entry (abfd, h, r_type, r_symndx, addend); | |
1941 | if (!gotent) | |
1942 | return FALSE; | |
1943 | ||
1944 | if (gotent_flags) | |
1945 | { | |
1946 | gotent->flags |= gotent_flags; | |
1947 | if (h) | |
1948 | { | |
1949 | gotent_flags |= h->flags; | |
1950 | h->flags = gotent_flags; | |
1951 | ||
1952 | /* Make a guess as to whether a .plt entry is needed. */ | |
1953 | /* ??? It appears that we won't make it into | |
1954 | adjust_dynamic_symbol for symbols that remain | |
1955 | totally undefined. Copying this check here means | |
1956 | we can create a plt entry for them too. */ | |
1957 | h->root.needs_plt | |
1958 | = (maybe_dynamic && elf64_alpha_want_plt (h)); | |
1959 | } | |
1960 | } | |
1961 | } | |
1962 | ||
1963 | if (need & NEED_DYNREL) | |
1964 | { | |
1965 | /* We need to create the section here now whether we eventually | |
1966 | use it or not so that it gets mapped to an output section by | |
1967 | the linker. If not used, we'll kill it in size_dynamic_sections. */ | |
1968 | if (sreloc == NULL) | |
1969 | { | |
1970 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
1971 | (sec, dynobj, 3, abfd, /*rela?*/ TRUE); | |
1972 | ||
1973 | if (sreloc == NULL) | |
1974 | return FALSE; | |
1975 | } | |
1976 | ||
1977 | if (h) | |
1978 | { | |
1979 | /* Since we havn't seen all of the input symbols yet, we | |
1980 | don't know whether we'll actually need a dynamic relocation | |
1981 | entry for this reloc. So make a record of it. Once we | |
1982 | find out if this thing needs dynamic relocation we'll | |
1983 | expand the relocation sections by the appropriate amount. */ | |
1984 | ||
1985 | struct alpha_elf_reloc_entry *rent; | |
1986 | ||
1987 | for (rent = h->reloc_entries; rent; rent = rent->next) | |
1988 | if (rent->rtype == r_type && rent->srel == sreloc) | |
1989 | break; | |
1990 | ||
1991 | if (!rent) | |
1992 | { | |
1993 | amt = sizeof (struct alpha_elf_reloc_entry); | |
1994 | rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt); | |
1995 | if (!rent) | |
1996 | return FALSE; | |
1997 | ||
1998 | rent->srel = sreloc; | |
1999 | rent->rtype = r_type; | |
2000 | rent->count = 1; | |
2001 | rent->reltext = (sec->flags & SEC_READONLY) != 0; | |
2002 | ||
2003 | rent->next = h->reloc_entries; | |
2004 | h->reloc_entries = rent; | |
2005 | } | |
2006 | else | |
2007 | rent->count++; | |
2008 | } | |
2009 | else if (bfd_link_pic (info)) | |
2010 | { | |
2011 | /* If this is a shared library, and the section is to be | |
2012 | loaded into memory, we need a RELATIVE reloc. */ | |
2013 | sreloc->size += sizeof (Elf64_External_Rela); | |
2014 | if (sec->flags & SEC_READONLY) | |
2015 | info->flags |= DF_TEXTREL; | |
2016 | } | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | return TRUE; | |
2021 | } | |
2022 | ||
2023 | /* Return the section that should be marked against GC for a given | |
2024 | relocation. */ | |
2025 | ||
2026 | static asection * | |
2027 | elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info, | |
2028 | Elf_Internal_Rela *rel, | |
2029 | struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) | |
2030 | { | |
2031 | /* These relocations don't really reference a symbol. Instead we store | |
2032 | extra data in their addend slot. Ignore the symbol. */ | |
2033 | switch (ELF64_R_TYPE (rel->r_info)) | |
2034 | { | |
2035 | case R_ALPHA_LITUSE: | |
2036 | case R_ALPHA_GPDISP: | |
2037 | case R_ALPHA_HINT: | |
2038 | return NULL; | |
2039 | } | |
2040 | ||
2041 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
2042 | } | |
2043 | ||
2044 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2045 | regular object. The current definition is in some section of the | |
2046 | dynamic object, but we're not including those sections. We have to | |
2047 | change the definition to something the rest of the link can | |
2048 | understand. */ | |
2049 | ||
2050 | static bfd_boolean | |
2051 | elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info, | |
2052 | struct elf_link_hash_entry *h) | |
2053 | { | |
2054 | bfd *dynobj; | |
2055 | asection *s; | |
2056 | struct alpha_elf_link_hash_entry *ah; | |
2057 | ||
2058 | dynobj = elf_hash_table(info)->dynobj; | |
2059 | ah = (struct alpha_elf_link_hash_entry *)h; | |
2060 | ||
2061 | /* Now that we've seen all of the input symbols, finalize our decision | |
2062 | about whether this symbol should get a .plt entry. Irritatingly, it | |
2063 | is common for folk to leave undefined symbols in shared libraries, | |
2064 | and they still expect lazy binding; accept undefined symbols in lieu | |
2065 | of STT_FUNC. */ | |
2066 | if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah)) | |
2067 | { | |
2068 | h->needs_plt = TRUE; | |
2069 | ||
2070 | s = elf_hash_table(info)->splt; | |
2071 | if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) | |
2072 | return FALSE; | |
2073 | ||
2074 | /* We need one plt entry per got subsection. Delay allocation of | |
2075 | the actual plt entries until size_plt_section, called from | |
2076 | size_dynamic_sections or during relaxation. */ | |
2077 | ||
2078 | return TRUE; | |
2079 | } | |
2080 | else | |
2081 | h->needs_plt = FALSE; | |
2082 | ||
2083 | /* If this is a weak symbol, and there is a real definition, the | |
2084 | processor independent code will have arranged for us to see the | |
2085 | real definition first, and we can just use the same value. */ | |
2086 | if (h->is_weakalias) | |
2087 | { | |
2088 | struct elf_link_hash_entry *def = weakdef (h); | |
2089 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
2090 | h->root.u.def.section = def->root.u.def.section; | |
2091 | h->root.u.def.value = def->root.u.def.value; | |
2092 | return TRUE; | |
2093 | } | |
2094 | ||
2095 | /* This is a reference to a symbol defined by a dynamic object which | |
2096 | is not a function. The Alpha, since it uses .got entries for all | |
2097 | symbols even in regular objects, does not need the hackery of a | |
2098 | .dynbss section and COPY dynamic relocations. */ | |
2099 | ||
2100 | return TRUE; | |
2101 | } | |
2102 | ||
2103 | /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */ | |
2104 | ||
2105 | static void | |
2106 | elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
2107 | const Elf_Internal_Sym *isym, | |
2108 | bfd_boolean definition, | |
2109 | bfd_boolean dynamic) | |
2110 | { | |
2111 | if (!dynamic && definition) | |
2112 | h->other = ((h->other & ELF_ST_VISIBILITY (-1)) | |
2113 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
2114 | } | |
2115 | ||
2116 | /* Symbol versioning can create new symbols, and make our old symbols | |
2117 | indirect to the new ones. Consolidate the got and reloc information | |
2118 | in these situations. */ | |
2119 | ||
2120 | static void | |
2121 | elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info, | |
2122 | struct elf_link_hash_entry *dir, | |
2123 | struct elf_link_hash_entry *ind) | |
2124 | { | |
2125 | struct alpha_elf_link_hash_entry *hi | |
2126 | = (struct alpha_elf_link_hash_entry *) ind; | |
2127 | struct alpha_elf_link_hash_entry *hs | |
2128 | = (struct alpha_elf_link_hash_entry *) dir; | |
2129 | ||
2130 | /* Do the merging in the superclass. */ | |
2131 | _bfd_elf_link_hash_copy_indirect(info, dir, ind); | |
2132 | ||
2133 | /* Merge the flags. Whee. */ | |
2134 | hs->flags |= hi->flags; | |
2135 | ||
2136 | /* ??? It's unclear to me what's really supposed to happen when | |
2137 | "merging" defweak and defined symbols, given that we don't | |
2138 | actually throw away the defweak. This more-or-less copies | |
2139 | the logic related to got and plt entries in the superclass. */ | |
2140 | if (ind->root.type != bfd_link_hash_indirect) | |
2141 | return; | |
2142 | ||
2143 | /* Merge the .got entries. Cannibalize the old symbol's list in | |
2144 | doing so, since we don't need it anymore. */ | |
2145 | ||
2146 | if (hs->got_entries == NULL) | |
2147 | hs->got_entries = hi->got_entries; | |
2148 | else | |
2149 | { | |
2150 | struct alpha_elf_got_entry *gi, *gs, *gin, *gsh; | |
2151 | ||
2152 | gsh = hs->got_entries; | |
2153 | for (gi = hi->got_entries; gi ; gi = gin) | |
2154 | { | |
2155 | gin = gi->next; | |
2156 | for (gs = gsh; gs ; gs = gs->next) | |
2157 | if (gi->gotobj == gs->gotobj | |
2158 | && gi->reloc_type == gs->reloc_type | |
2159 | && gi->addend == gs->addend) | |
2160 | { | |
2161 | gs->use_count += gi->use_count; | |
2162 | goto got_found; | |
2163 | } | |
2164 | gi->next = hs->got_entries; | |
2165 | hs->got_entries = gi; | |
2166 | got_found:; | |
2167 | } | |
2168 | } | |
2169 | hi->got_entries = NULL; | |
2170 | ||
2171 | /* And similar for the reloc entries. */ | |
2172 | ||
2173 | if (hs->reloc_entries == NULL) | |
2174 | hs->reloc_entries = hi->reloc_entries; | |
2175 | else | |
2176 | { | |
2177 | struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh; | |
2178 | ||
2179 | rsh = hs->reloc_entries; | |
2180 | for (ri = hi->reloc_entries; ri ; ri = rin) | |
2181 | { | |
2182 | rin = ri->next; | |
2183 | for (rs = rsh; rs ; rs = rs->next) | |
2184 | if (ri->rtype == rs->rtype && ri->srel == rs->srel) | |
2185 | { | |
2186 | rs->count += ri->count; | |
2187 | goto found_reloc; | |
2188 | } | |
2189 | ri->next = hs->reloc_entries; | |
2190 | hs->reloc_entries = ri; | |
2191 | found_reloc:; | |
2192 | } | |
2193 | } | |
2194 | hi->reloc_entries = NULL; | |
2195 | } | |
2196 | ||
2197 | /* Is it possible to merge two object file's .got tables? */ | |
2198 | ||
2199 | static bfd_boolean | |
2200 | elf64_alpha_can_merge_gots (bfd *a, bfd *b) | |
2201 | { | |
2202 | int total = alpha_elf_tdata (a)->total_got_size; | |
2203 | bfd *bsub; | |
2204 | ||
2205 | /* Trivial quick fallout test. */ | |
2206 | if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE) | |
2207 | return TRUE; | |
2208 | ||
2209 | /* By their nature, local .got entries cannot be merged. */ | |
2210 | if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE) | |
2211 | return FALSE; | |
2212 | ||
2213 | /* Failing the common trivial comparison, we must effectively | |
2214 | perform the merge. Not actually performing the merge means that | |
2215 | we don't have to store undo information in case we fail. */ | |
2216 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) | |
2217 | { | |
2218 | struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub); | |
2219 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr; | |
2220 | int i, n; | |
2221 | ||
2222 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; | |
2223 | for (i = 0; i < n; ++i) | |
2224 | { | |
2225 | struct alpha_elf_got_entry *ae, *be; | |
2226 | struct alpha_elf_link_hash_entry *h; | |
2227 | ||
2228 | h = hashes[i]; | |
2229 | while (h->root.root.type == bfd_link_hash_indirect | |
2230 | || h->root.root.type == bfd_link_hash_warning) | |
2231 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
2232 | ||
2233 | for (be = h->got_entries; be ; be = be->next) | |
2234 | { | |
2235 | if (be->use_count == 0) | |
2236 | continue; | |
2237 | if (be->gotobj != b) | |
2238 | continue; | |
2239 | ||
2240 | for (ae = h->got_entries; ae ; ae = ae->next) | |
2241 | if (ae->gotobj == a | |
2242 | && ae->reloc_type == be->reloc_type | |
2243 | && ae->addend == be->addend) | |
2244 | goto global_found; | |
2245 | ||
2246 | total += alpha_got_entry_size (be->reloc_type); | |
2247 | if (total > MAX_GOT_SIZE) | |
2248 | return FALSE; | |
2249 | global_found:; | |
2250 | } | |
2251 | } | |
2252 | } | |
2253 | ||
2254 | return TRUE; | |
2255 | } | |
2256 | ||
2257 | /* Actually merge two .got tables. */ | |
2258 | ||
2259 | static void | |
2260 | elf64_alpha_merge_gots (bfd *a, bfd *b) | |
2261 | { | |
2262 | int total = alpha_elf_tdata (a)->total_got_size; | |
2263 | bfd *bsub; | |
2264 | ||
2265 | /* Remember local expansion. */ | |
2266 | { | |
2267 | int e = alpha_elf_tdata (b)->local_got_size; | |
2268 | total += e; | |
2269 | alpha_elf_tdata (a)->local_got_size += e; | |
2270 | } | |
2271 | ||
2272 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) | |
2273 | { | |
2274 | struct alpha_elf_got_entry **local_got_entries; | |
2275 | struct alpha_elf_link_hash_entry **hashes; | |
2276 | Elf_Internal_Shdr *symtab_hdr; | |
2277 | int i, n; | |
2278 | ||
2279 | /* Let the local .got entries know they are part of a new subsegment. */ | |
2280 | local_got_entries = alpha_elf_tdata (bsub)->local_got_entries; | |
2281 | if (local_got_entries) | |
2282 | { | |
2283 | n = elf_tdata (bsub)->symtab_hdr.sh_info; | |
2284 | for (i = 0; i < n; ++i) | |
2285 | { | |
2286 | struct alpha_elf_got_entry *ent; | |
2287 | for (ent = local_got_entries[i]; ent; ent = ent->next) | |
2288 | ent->gotobj = a; | |
2289 | } | |
2290 | } | |
2291 | ||
2292 | /* Merge the global .got entries. */ | |
2293 | hashes = alpha_elf_sym_hashes (bsub); | |
2294 | symtab_hdr = &elf_tdata (bsub)->symtab_hdr; | |
2295 | ||
2296 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; | |
2297 | for (i = 0; i < n; ++i) | |
2298 | { | |
2299 | struct alpha_elf_got_entry *ae, *be, **pbe, **start; | |
2300 | struct alpha_elf_link_hash_entry *h; | |
2301 | ||
2302 | h = hashes[i]; | |
2303 | while (h->root.root.type == bfd_link_hash_indirect | |
2304 | || h->root.root.type == bfd_link_hash_warning) | |
2305 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
2306 | ||
2307 | pbe = start = &h->got_entries; | |
2308 | while ((be = *pbe) != NULL) | |
2309 | { | |
2310 | if (be->use_count == 0) | |
2311 | { | |
2312 | *pbe = be->next; | |
2313 | memset (be, 0xa5, sizeof (*be)); | |
2314 | goto kill; | |
2315 | } | |
2316 | if (be->gotobj != b) | |
2317 | goto next; | |
2318 | ||
2319 | for (ae = *start; ae ; ae = ae->next) | |
2320 | if (ae->gotobj == a | |
2321 | && ae->reloc_type == be->reloc_type | |
2322 | && ae->addend == be->addend) | |
2323 | { | |
2324 | ae->flags |= be->flags; | |
2325 | ae->use_count += be->use_count; | |
2326 | *pbe = be->next; | |
2327 | memset (be, 0xa5, sizeof (*be)); | |
2328 | goto kill; | |
2329 | } | |
2330 | be->gotobj = a; | |
2331 | total += alpha_got_entry_size (be->reloc_type); | |
2332 | ||
2333 | next:; | |
2334 | pbe = &be->next; | |
2335 | kill:; | |
2336 | } | |
2337 | } | |
2338 | ||
2339 | alpha_elf_tdata (bsub)->gotobj = a; | |
2340 | } | |
2341 | alpha_elf_tdata (a)->total_got_size = total; | |
2342 | ||
2343 | /* Merge the two in_got chains. */ | |
2344 | { | |
2345 | bfd *next; | |
2346 | ||
2347 | bsub = a; | |
2348 | while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL) | |
2349 | bsub = next; | |
2350 | ||
2351 | alpha_elf_tdata (bsub)->in_got_link_next = b; | |
2352 | } | |
2353 | } | |
2354 | ||
2355 | /* Calculate the offsets for the got entries. */ | |
2356 | ||
2357 | static bfd_boolean | |
2358 | elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h, | |
2359 | void * arg ATTRIBUTE_UNUSED) | |
2360 | { | |
2361 | struct alpha_elf_got_entry *gotent; | |
2362 | ||
2363 | for (gotent = h->got_entries; gotent; gotent = gotent->next) | |
2364 | if (gotent->use_count > 0) | |
2365 | { | |
2366 | struct alpha_elf_obj_tdata *td; | |
2367 | bfd_size_type *plge; | |
2368 | ||
2369 | td = alpha_elf_tdata (gotent->gotobj); | |
2370 | plge = &td->got->size; | |
2371 | gotent->got_offset = *plge; | |
2372 | *plge += alpha_got_entry_size (gotent->reloc_type); | |
2373 | } | |
2374 | ||
2375 | return TRUE; | |
2376 | } | |
2377 | ||
2378 | static void | |
2379 | elf64_alpha_calc_got_offsets (struct bfd_link_info *info) | |
2380 | { | |
2381 | bfd *i, *got_list; | |
2382 | struct alpha_elf_link_hash_table * htab; | |
2383 | ||
2384 | htab = alpha_elf_hash_table (info); | |
2385 | if (htab == NULL) | |
2386 | return; | |
2387 | got_list = htab->got_list; | |
2388 | ||
2389 | /* First, zero out the .got sizes, as we may be recalculating the | |
2390 | .got after optimizing it. */ | |
2391 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) | |
2392 | alpha_elf_tdata(i)->got->size = 0; | |
2393 | ||
2394 | /* Next, fill in the offsets for all the global entries. */ | |
2395 | alpha_elf_link_hash_traverse (htab, | |
2396 | elf64_alpha_calc_got_offsets_for_symbol, | |
2397 | NULL); | |
2398 | ||
2399 | /* Finally, fill in the offsets for the local entries. */ | |
2400 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) | |
2401 | { | |
2402 | bfd_size_type got_offset = alpha_elf_tdata(i)->got->size; | |
2403 | bfd *j; | |
2404 | ||
2405 | for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) | |
2406 | { | |
2407 | struct alpha_elf_got_entry **local_got_entries, *gotent; | |
2408 | int k, n; | |
2409 | ||
2410 | local_got_entries = alpha_elf_tdata(j)->local_got_entries; | |
2411 | if (!local_got_entries) | |
2412 | continue; | |
2413 | ||
2414 | for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) | |
2415 | for (gotent = local_got_entries[k]; gotent; gotent = gotent->next) | |
2416 | if (gotent->use_count > 0) | |
2417 | { | |
2418 | gotent->got_offset = got_offset; | |
2419 | got_offset += alpha_got_entry_size (gotent->reloc_type); | |
2420 | } | |
2421 | } | |
2422 | ||
2423 | alpha_elf_tdata(i)->got->size = got_offset; | |
2424 | } | |
2425 | } | |
2426 | ||
2427 | /* Constructs the gots. */ | |
2428 | ||
2429 | static bfd_boolean | |
2430 | elf64_alpha_size_got_sections (struct bfd_link_info *info, | |
2431 | bfd_boolean may_merge) | |
2432 | { | |
2433 | bfd *i, *got_list, *cur_got_obj = NULL; | |
2434 | struct alpha_elf_link_hash_table * htab; | |
2435 | ||
2436 | htab = alpha_elf_hash_table (info); | |
2437 | if (htab == NULL) | |
2438 | return FALSE; | |
2439 | got_list = htab->got_list; | |
2440 | ||
2441 | /* On the first time through, pretend we have an existing got list | |
2442 | consisting of all of the input files. */ | |
2443 | if (got_list == NULL) | |
2444 | { | |
2445 | for (i = info->input_bfds; i ; i = i->link.next) | |
2446 | { | |
2447 | bfd *this_got; | |
2448 | ||
2449 | if (! is_alpha_elf (i)) | |
2450 | continue; | |
2451 | ||
2452 | this_got = alpha_elf_tdata (i)->gotobj; | |
2453 | if (this_got == NULL) | |
2454 | continue; | |
2455 | ||
2456 | /* We are assuming no merging has yet occurred. */ | |
2457 | BFD_ASSERT (this_got == i); | |
2458 | ||
2459 | if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE) | |
2460 | { | |
2461 | /* Yikes! A single object file has too many entries. */ | |
2462 | _bfd_error_handler | |
2463 | /* xgettext:c-format */ | |
2464 | (_("%pB: .got subsegment exceeds 64K (size %d)"), | |
2465 | i, alpha_elf_tdata (this_got)->total_got_size); | |
2466 | return FALSE; | |
2467 | } | |
2468 | ||
2469 | if (got_list == NULL) | |
2470 | got_list = this_got; | |
2471 | else | |
2472 | alpha_elf_tdata(cur_got_obj)->got_link_next = this_got; | |
2473 | cur_got_obj = this_got; | |
2474 | } | |
2475 | ||
2476 | /* Strange degenerate case of no got references. */ | |
2477 | if (got_list == NULL) | |
2478 | return TRUE; | |
2479 | ||
2480 | htab->got_list = got_list; | |
2481 | } | |
2482 | ||
2483 | cur_got_obj = got_list; | |
2484 | if (cur_got_obj == NULL) | |
2485 | return FALSE; | |
2486 | ||
2487 | if (may_merge) | |
2488 | { | |
2489 | i = alpha_elf_tdata(cur_got_obj)->got_link_next; | |
2490 | while (i != NULL) | |
2491 | { | |
2492 | if (elf64_alpha_can_merge_gots (cur_got_obj, i)) | |
2493 | { | |
2494 | elf64_alpha_merge_gots (cur_got_obj, i); | |
2495 | ||
2496 | alpha_elf_tdata(i)->got->size = 0; | |
2497 | i = alpha_elf_tdata(i)->got_link_next; | |
2498 | alpha_elf_tdata(cur_got_obj)->got_link_next = i; | |
2499 | } | |
2500 | else | |
2501 | { | |
2502 | cur_got_obj = i; | |
2503 | i = alpha_elf_tdata(i)->got_link_next; | |
2504 | } | |
2505 | } | |
2506 | } | |
2507 | ||
2508 | /* Once the gots have been merged, fill in the got offsets for | |
2509 | everything therein. */ | |
2510 | elf64_alpha_calc_got_offsets (info); | |
2511 | ||
2512 | return TRUE; | |
2513 | } | |
2514 | ||
2515 | static bfd_boolean | |
2516 | elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, | |
2517 | void * data) | |
2518 | { | |
2519 | asection *splt = (asection *) data; | |
2520 | struct alpha_elf_got_entry *gotent; | |
2521 | bfd_boolean saw_one = FALSE; | |
2522 | ||
2523 | /* If we didn't need an entry before, we still don't. */ | |
2524 | if (!h->root.needs_plt) | |
2525 | return TRUE; | |
2526 | ||
2527 | /* For each LITERAL got entry still in use, allocate a plt entry. */ | |
2528 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) | |
2529 | if (gotent->reloc_type == R_ALPHA_LITERAL | |
2530 | && gotent->use_count > 0) | |
2531 | { | |
2532 | if (splt->size == 0) | |
2533 | splt->size = PLT_HEADER_SIZE; | |
2534 | gotent->plt_offset = splt->size; | |
2535 | splt->size += PLT_ENTRY_SIZE; | |
2536 | saw_one = TRUE; | |
2537 | } | |
2538 | ||
2539 | /* If there weren't any, there's no longer a need for the PLT entry. */ | |
2540 | if (!saw_one) | |
2541 | h->root.needs_plt = FALSE; | |
2542 | ||
2543 | return TRUE; | |
2544 | } | |
2545 | ||
2546 | /* Called from relax_section to rebuild the PLT in light of potential changes | |
2547 | in the function's status. */ | |
2548 | ||
2549 | static void | |
2550 | elf64_alpha_size_plt_section (struct bfd_link_info *info) | |
2551 | { | |
2552 | asection *splt, *spltrel, *sgotplt; | |
2553 | unsigned long entries; | |
2554 | struct alpha_elf_link_hash_table * htab; | |
2555 | ||
2556 | htab = alpha_elf_hash_table (info); | |
2557 | if (htab == NULL) | |
2558 | return; | |
2559 | ||
2560 | splt = elf_hash_table(info)->splt; | |
2561 | if (splt == NULL) | |
2562 | return; | |
2563 | ||
2564 | splt->size = 0; | |
2565 | ||
2566 | alpha_elf_link_hash_traverse (htab, | |
2567 | elf64_alpha_size_plt_section_1, splt); | |
2568 | ||
2569 | /* Every plt entry requires a JMP_SLOT relocation. */ | |
2570 | spltrel = elf_hash_table(info)->srelplt; | |
2571 | entries = 0; | |
2572 | if (splt->size) | |
2573 | { | |
2574 | if (elf64_alpha_use_secureplt) | |
2575 | entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE; | |
2576 | else | |
2577 | entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE; | |
2578 | } | |
2579 | spltrel->size = entries * sizeof (Elf64_External_Rela); | |
2580 | ||
2581 | /* When using the secureplt, we need two words somewhere in the data | |
2582 | segment for the dynamic linker to tell us where to go. This is the | |
2583 | entire contents of the .got.plt section. */ | |
2584 | if (elf64_alpha_use_secureplt) | |
2585 | { | |
2586 | sgotplt = elf_hash_table(info)->sgotplt; | |
2587 | sgotplt->size = entries ? 16 : 0; | |
2588 | } | |
2589 | } | |
2590 | ||
2591 | static bfd_boolean | |
2592 | elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
2593 | struct bfd_link_info *info) | |
2594 | { | |
2595 | bfd *i; | |
2596 | struct alpha_elf_link_hash_table * htab; | |
2597 | ||
2598 | if (bfd_link_relocatable (info)) | |
2599 | return TRUE; | |
2600 | ||
2601 | htab = alpha_elf_hash_table (info); | |
2602 | if (htab == NULL) | |
2603 | return FALSE; | |
2604 | ||
2605 | if (!elf64_alpha_size_got_sections (info, TRUE)) | |
2606 | return FALSE; | |
2607 | ||
2608 | /* Allocate space for all of the .got subsections. */ | |
2609 | i = htab->got_list; | |
2610 | for ( ; i ; i = alpha_elf_tdata(i)->got_link_next) | |
2611 | { | |
2612 | asection *s = alpha_elf_tdata(i)->got; | |
2613 | if (s->size > 0) | |
2614 | { | |
2615 | s->contents = (bfd_byte *) bfd_zalloc (i, s->size); | |
2616 | if (s->contents == NULL) | |
2617 | return FALSE; | |
2618 | } | |
2619 | } | |
2620 | ||
2621 | return TRUE; | |
2622 | } | |
2623 | ||
2624 | /* The number of dynamic relocations required by a static relocation. */ | |
2625 | ||
2626 | static int | |
2627 | alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared, int pie) | |
2628 | { | |
2629 | switch (r_type) | |
2630 | { | |
2631 | /* May appear in GOT entries. */ | |
2632 | case R_ALPHA_TLSGD: | |
2633 | return (dynamic ? 2 : shared ? 1 : 0); | |
2634 | case R_ALPHA_TLSLDM: | |
2635 | return shared; | |
2636 | case R_ALPHA_LITERAL: | |
2637 | return dynamic || shared; | |
2638 | case R_ALPHA_GOTTPREL: | |
2639 | return dynamic || (shared && !pie); | |
2640 | case R_ALPHA_GOTDTPREL: | |
2641 | return dynamic; | |
2642 | ||
2643 | /* May appear in data sections. */ | |
2644 | case R_ALPHA_REFLONG: | |
2645 | case R_ALPHA_REFQUAD: | |
2646 | return dynamic || shared; | |
2647 | case R_ALPHA_TPREL64: | |
2648 | return dynamic || (shared && !pie); | |
2649 | ||
2650 | /* Everything else is illegal. We'll issue an error during | |
2651 | relocate_section. */ | |
2652 | default: | |
2653 | return 0; | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | /* Work out the sizes of the dynamic relocation entries. */ | |
2658 | ||
2659 | static bfd_boolean | |
2660 | elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h, | |
2661 | struct bfd_link_info *info) | |
2662 | { | |
2663 | bfd_boolean dynamic; | |
2664 | struct alpha_elf_reloc_entry *relent; | |
2665 | unsigned long entries; | |
2666 | ||
2667 | /* If the symbol was defined as a common symbol in a regular object | |
2668 | file, and there was no definition in any dynamic object, then the | |
2669 | linker will have allocated space for the symbol in a common | |
2670 | section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been | |
2671 | set. This is done for dynamic symbols in | |
2672 | elf_adjust_dynamic_symbol but this is not done for non-dynamic | |
2673 | symbols, somehow. */ | |
2674 | if (!h->root.def_regular | |
2675 | && h->root.ref_regular | |
2676 | && !h->root.def_dynamic | |
2677 | && (h->root.root.type == bfd_link_hash_defined | |
2678 | || h->root.root.type == bfd_link_hash_defweak) | |
2679 | && !(h->root.root.u.def.section->owner->flags & DYNAMIC)) | |
2680 | h->root.def_regular = 1; | |
2681 | ||
2682 | /* If the symbol is dynamic, we'll need all the relocations in their | |
2683 | natural form. If this is a shared object, and it has been forced | |
2684 | local, we'll need the same number of RELATIVE relocations. */ | |
2685 | dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); | |
2686 | ||
2687 | /* If the symbol is a hidden undefined weak, then we never have any | |
2688 | relocations. Avoid the loop which may want to add RELATIVE relocs | |
2689 | based on bfd_link_pic (info). */ | |
2690 | if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) | |
2691 | return TRUE; | |
2692 | ||
2693 | for (relent = h->reloc_entries; relent; relent = relent->next) | |
2694 | { | |
2695 | entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic, | |
2696 | bfd_link_pic (info), | |
2697 | bfd_link_pie (info)); | |
2698 | if (entries) | |
2699 | { | |
2700 | relent->srel->size += | |
2701 | entries * sizeof (Elf64_External_Rela) * relent->count; | |
2702 | if (relent->reltext) | |
2703 | info->flags |= DT_TEXTREL; | |
2704 | } | |
2705 | } | |
2706 | ||
2707 | return TRUE; | |
2708 | } | |
2709 | ||
2710 | /* Subroutine of elf64_alpha_size_rela_got_section for doing the | |
2711 | global symbols. */ | |
2712 | ||
2713 | static bfd_boolean | |
2714 | elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h, | |
2715 | struct bfd_link_info *info) | |
2716 | { | |
2717 | bfd_boolean dynamic; | |
2718 | struct alpha_elf_got_entry *gotent; | |
2719 | unsigned long entries; | |
2720 | ||
2721 | /* If we're using a plt for this symbol, then all of its relocations | |
2722 | for its got entries go into .rela.plt. */ | |
2723 | if (h->root.needs_plt) | |
2724 | return TRUE; | |
2725 | ||
2726 | /* If the symbol is dynamic, we'll need all the relocations in their | |
2727 | natural form. If this is a shared object, and it has been forced | |
2728 | local, we'll need the same number of RELATIVE relocations. */ | |
2729 | dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); | |
2730 | ||
2731 | /* If the symbol is a hidden undefined weak, then we never have any | |
2732 | relocations. Avoid the loop which may want to add RELATIVE relocs | |
2733 | based on bfd_link_pic (info). */ | |
2734 | if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) | |
2735 | return TRUE; | |
2736 | ||
2737 | entries = 0; | |
2738 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) | |
2739 | if (gotent->use_count > 0) | |
2740 | entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, dynamic, | |
2741 | bfd_link_pic (info), | |
2742 | bfd_link_pie (info)); | |
2743 | ||
2744 | if (entries > 0) | |
2745 | { | |
2746 | asection *srel = elf_hash_table(info)->srelgot; | |
2747 | BFD_ASSERT (srel != NULL); | |
2748 | srel->size += sizeof (Elf64_External_Rela) * entries; | |
2749 | } | |
2750 | ||
2751 | return TRUE; | |
2752 | } | |
2753 | ||
2754 | /* Set the sizes of the dynamic relocation sections. */ | |
2755 | ||
2756 | static void | |
2757 | elf64_alpha_size_rela_got_section (struct bfd_link_info *info) | |
2758 | { | |
2759 | unsigned long entries; | |
2760 | bfd *i; | |
2761 | asection *srel; | |
2762 | struct alpha_elf_link_hash_table * htab; | |
2763 | ||
2764 | htab = alpha_elf_hash_table (info); | |
2765 | if (htab == NULL) | |
2766 | return; | |
2767 | ||
2768 | /* Shared libraries often require RELATIVE relocs, and some relocs | |
2769 | require attention for the main application as well. */ | |
2770 | ||
2771 | entries = 0; | |
2772 | for (i = htab->got_list; | |
2773 | i ; i = alpha_elf_tdata(i)->got_link_next) | |
2774 | { | |
2775 | bfd *j; | |
2776 | ||
2777 | for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) | |
2778 | { | |
2779 | struct alpha_elf_got_entry **local_got_entries, *gotent; | |
2780 | int k, n; | |
2781 | ||
2782 | local_got_entries = alpha_elf_tdata(j)->local_got_entries; | |
2783 | if (!local_got_entries) | |
2784 | continue; | |
2785 | ||
2786 | for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) | |
2787 | for (gotent = local_got_entries[k]; | |
2788 | gotent ; gotent = gotent->next) | |
2789 | if (gotent->use_count > 0) | |
2790 | entries += (alpha_dynamic_entries_for_reloc | |
2791 | (gotent->reloc_type, 0, bfd_link_pic (info), | |
2792 | bfd_link_pie (info))); | |
2793 | } | |
2794 | } | |
2795 | ||
2796 | srel = elf_hash_table(info)->srelgot; | |
2797 | if (!srel) | |
2798 | { | |
2799 | BFD_ASSERT (entries == 0); | |
2800 | return; | |
2801 | } | |
2802 | srel->size = sizeof (Elf64_External_Rela) * entries; | |
2803 | ||
2804 | /* Now do the non-local symbols. */ | |
2805 | alpha_elf_link_hash_traverse (htab, | |
2806 | elf64_alpha_size_rela_got_1, info); | |
2807 | } | |
2808 | ||
2809 | /* Set the sizes of the dynamic sections. */ | |
2810 | ||
2811 | static bfd_boolean | |
2812 | elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
2813 | struct bfd_link_info *info) | |
2814 | { | |
2815 | bfd *dynobj; | |
2816 | asection *s; | |
2817 | bfd_boolean relplt, relocs; | |
2818 | struct alpha_elf_link_hash_table * htab; | |
2819 | ||
2820 | htab = alpha_elf_hash_table (info); | |
2821 | if (htab == NULL) | |
2822 | return FALSE; | |
2823 | ||
2824 | dynobj = elf_hash_table(info)->dynobj; | |
2825 | BFD_ASSERT(dynobj != NULL); | |
2826 | ||
2827 | if (elf_hash_table (info)->dynamic_sections_created) | |
2828 | { | |
2829 | /* Set the contents of the .interp section to the interpreter. */ | |
2830 | if (bfd_link_executable (info) && !info->nointerp) | |
2831 | { | |
2832 | s = bfd_get_linker_section (dynobj, ".interp"); | |
2833 | BFD_ASSERT (s != NULL); | |
2834 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
2835 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
2836 | } | |
2837 | ||
2838 | /* Now that we've seen all of the input files, we can decide which | |
2839 | symbols need dynamic relocation entries and which don't. We've | |
2840 | collected information in check_relocs that we can now apply to | |
2841 | size the dynamic relocation sections. */ | |
2842 | alpha_elf_link_hash_traverse (htab, | |
2843 | elf64_alpha_calc_dynrel_sizes, info); | |
2844 | ||
2845 | elf64_alpha_size_rela_got_section (info); | |
2846 | elf64_alpha_size_plt_section (info); | |
2847 | } | |
2848 | /* else we're not dynamic and by definition we don't need such things. */ | |
2849 | ||
2850 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
2851 | determined the sizes of the various dynamic sections. Allocate | |
2852 | memory for them. */ | |
2853 | relplt = FALSE; | |
2854 | relocs = FALSE; | |
2855 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2856 | { | |
2857 | const char *name; | |
2858 | ||
2859 | if (!(s->flags & SEC_LINKER_CREATED)) | |
2860 | continue; | |
2861 | ||
2862 | /* It's OK to base decisions on the section name, because none | |
2863 | of the dynobj section names depend upon the input files. */ | |
2864 | name = bfd_section_name (s); | |
2865 | ||
2866 | if (CONST_STRNEQ (name, ".rela")) | |
2867 | { | |
2868 | if (s->size != 0) | |
2869 | { | |
2870 | if (strcmp (name, ".rela.plt") == 0) | |
2871 | relplt = TRUE; | |
2872 | else | |
2873 | relocs = TRUE; | |
2874 | ||
2875 | /* We use the reloc_count field as a counter if we need | |
2876 | to copy relocs into the output file. */ | |
2877 | s->reloc_count = 0; | |
2878 | } | |
2879 | } | |
2880 | else if (! CONST_STRNEQ (name, ".got") | |
2881 | && strcmp (name, ".plt") != 0 | |
2882 | && strcmp (name, ".dynbss") != 0) | |
2883 | { | |
2884 | /* It's not one of our dynamic sections, so don't allocate space. */ | |
2885 | continue; | |
2886 | } | |
2887 | ||
2888 | if (s->size == 0) | |
2889 | { | |
2890 | /* If we don't need this section, strip it from the output file. | |
2891 | This is to handle .rela.bss and .rela.plt. We must create it | |
2892 | in create_dynamic_sections, because it must be created before | |
2893 | the linker maps input sections to output sections. The | |
2894 | linker does that before adjust_dynamic_symbol is called, and | |
2895 | it is that function which decides whether anything needs to | |
2896 | go into these sections. */ | |
2897 | if (!CONST_STRNEQ (name, ".got")) | |
2898 | s->flags |= SEC_EXCLUDE; | |
2899 | } | |
2900 | else if ((s->flags & SEC_HAS_CONTENTS) != 0) | |
2901 | { | |
2902 | /* Allocate memory for the section contents. */ | |
2903 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
2904 | if (s->contents == NULL) | |
2905 | return FALSE; | |
2906 | } | |
2907 | } | |
2908 | ||
2909 | if (elf_hash_table (info)->dynamic_sections_created) | |
2910 | { | |
2911 | /* Add some entries to the .dynamic section. We fill in the | |
2912 | values later, in elf64_alpha_finish_dynamic_sections, but we | |
2913 | must add the entries now so that we get the correct size for | |
2914 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2915 | dynamic linker and used by the debugger. */ | |
2916 | #define add_dynamic_entry(TAG, VAL) \ | |
2917 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
2918 | ||
2919 | if (bfd_link_executable (info)) | |
2920 | { | |
2921 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
2922 | return FALSE; | |
2923 | } | |
2924 | ||
2925 | if (relplt) | |
2926 | { | |
2927 | if (!add_dynamic_entry (DT_PLTGOT, 0) | |
2928 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2929 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2930 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
2931 | return FALSE; | |
2932 | ||
2933 | if (elf64_alpha_use_secureplt | |
2934 | && !add_dynamic_entry (DT_ALPHA_PLTRO, 1)) | |
2935 | return FALSE; | |
2936 | } | |
2937 | ||
2938 | if (relocs) | |
2939 | { | |
2940 | if (!add_dynamic_entry (DT_RELA, 0) | |
2941 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2942 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
2943 | return FALSE; | |
2944 | ||
2945 | if (info->flags & DF_TEXTREL) | |
2946 | { | |
2947 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
2948 | return FALSE; | |
2949 | } | |
2950 | } | |
2951 | } | |
2952 | #undef add_dynamic_entry | |
2953 | ||
2954 | return TRUE; | |
2955 | } | |
2956 | \f | |
2957 | /* These functions do relaxation for Alpha ELF. | |
2958 | ||
2959 | Currently I'm only handling what I can do with existing compiler | |
2960 | and assembler support, which means no instructions are removed, | |
2961 | though some may be nopped. At this time GCC does not emit enough | |
2962 | information to do all of the relaxing that is possible. It will | |
2963 | take some not small amount of work for that to happen. | |
2964 | ||
2965 | There are a couple of interesting papers that I once read on this | |
2966 | subject, that I cannot find references to at the moment, that | |
2967 | related to Alpha in particular. They are by David Wall, then of | |
2968 | DEC WRL. */ | |
2969 | ||
2970 | struct alpha_relax_info | |
2971 | { | |
2972 | bfd *abfd; | |
2973 | asection *sec; | |
2974 | bfd_byte *contents; | |
2975 | Elf_Internal_Shdr *symtab_hdr; | |
2976 | Elf_Internal_Rela *relocs, *relend; | |
2977 | struct bfd_link_info *link_info; | |
2978 | bfd_vma gp; | |
2979 | bfd *gotobj; | |
2980 | asection *tsec; | |
2981 | struct alpha_elf_link_hash_entry *h; | |
2982 | struct alpha_elf_got_entry **first_gotent; | |
2983 | struct alpha_elf_got_entry *gotent; | |
2984 | bfd_boolean changed_contents; | |
2985 | bfd_boolean changed_relocs; | |
2986 | unsigned char other; | |
2987 | }; | |
2988 | ||
2989 | static Elf_Internal_Rela * | |
2990 | elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel, | |
2991 | Elf_Internal_Rela *relend, | |
2992 | bfd_vma offset, int type) | |
2993 | { | |
2994 | while (rel < relend) | |
2995 | { | |
2996 | if (rel->r_offset == offset | |
2997 | && ELF64_R_TYPE (rel->r_info) == (unsigned int) type) | |
2998 | return rel; | |
2999 | ++rel; | |
3000 | } | |
3001 | return NULL; | |
3002 | } | |
3003 | ||
3004 | static bfd_boolean | |
3005 | elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval, | |
3006 | Elf_Internal_Rela *irel, unsigned long r_type) | |
3007 | { | |
3008 | unsigned int insn; | |
3009 | bfd_signed_vma disp; | |
3010 | ||
3011 | /* Get the instruction. */ | |
3012 | insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); | |
3013 | ||
3014 | if (insn >> 26 != OP_LDQ) | |
3015 | { | |
3016 | reloc_howto_type *howto = elf64_alpha_howto_table + r_type; | |
3017 | _bfd_error_handler | |
3018 | /* xgettext:c-format */ | |
3019 | (_("%pB: %pA+%#" PRIx64 ": warning: " | |
3020 | "%s relocation against unexpected insn"), | |
3021 | info->abfd, info->sec, (uint64_t) irel->r_offset, howto->name); | |
3022 | return TRUE; | |
3023 | } | |
3024 | ||
3025 | /* Can't relax dynamic symbols. */ | |
3026 | if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) | |
3027 | return TRUE; | |
3028 | ||
3029 | /* Can't use local-exec relocations in shared libraries. */ | |
3030 | if (r_type == R_ALPHA_GOTTPREL | |
3031 | && bfd_link_dll (info->link_info)) | |
3032 | return TRUE; | |
3033 | ||
3034 | if (r_type == R_ALPHA_LITERAL) | |
3035 | { | |
3036 | /* Look for nice constant addresses. This includes the not-uncommon | |
3037 | special case of 0 for undefweak symbols. */ | |
3038 | if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak) | |
3039 | || (!bfd_link_pic (info->link_info) | |
3040 | && (symval >= (bfd_vma)-0x8000 || symval < 0x8000))) | |
3041 | { | |
3042 | disp = 0; | |
3043 | insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); | |
3044 | insn |= (symval & 0xffff); | |
3045 | r_type = R_ALPHA_NONE; | |
3046 | } | |
3047 | else | |
3048 | { | |
3049 | /* We may only create GPREL relocs during the second pass. */ | |
3050 | if (info->link_info->relax_pass == 0) | |
3051 | return TRUE; | |
3052 | ||
3053 | disp = symval - info->gp; | |
3054 | insn = (OP_LDA << 26) | (insn & 0x03ff0000); | |
3055 | r_type = R_ALPHA_GPREL16; | |
3056 | } | |
3057 | } | |
3058 | else | |
3059 | { | |
3060 | bfd_vma dtp_base, tp_base; | |
3061 | ||
3062 | BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); | |
3063 | dtp_base = alpha_get_dtprel_base (info->link_info); | |
3064 | tp_base = alpha_get_tprel_base (info->link_info); | |
3065 | disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base); | |
3066 | ||
3067 | insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); | |
3068 | ||
3069 | switch (r_type) | |
3070 | { | |
3071 | case R_ALPHA_GOTDTPREL: | |
3072 | r_type = R_ALPHA_DTPREL16; | |
3073 | break; | |
3074 | case R_ALPHA_GOTTPREL: | |
3075 | r_type = R_ALPHA_TPREL16; | |
3076 | break; | |
3077 | default: | |
3078 | BFD_ASSERT (0); | |
3079 | return FALSE; | |
3080 | } | |
3081 | } | |
3082 | ||
3083 | if (disp < -0x8000 || disp >= 0x8000) | |
3084 | return TRUE; | |
3085 | ||
3086 | bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); | |
3087 | info->changed_contents = TRUE; | |
3088 | ||
3089 | /* Reduce the use count on this got entry by one, possibly | |
3090 | eliminating it. */ | |
3091 | if (--info->gotent->use_count == 0) | |
3092 | { | |
3093 | int sz = alpha_got_entry_size (r_type); | |
3094 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; | |
3095 | if (!info->h) | |
3096 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; | |
3097 | } | |
3098 | ||
3099 | /* Smash the existing GOT relocation for its 16-bit immediate pair. */ | |
3100 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type); | |
3101 | info->changed_relocs = TRUE; | |
3102 | ||
3103 | /* ??? Search forward through this basic block looking for insns | |
3104 | that use the target register. Stop after an insn modifying the | |
3105 | register is seen, or after a branch or call. | |
3106 | ||
3107 | Any such memory load insn may be substituted by a load directly | |
3108 | off the GP. This allows the memory load insn to be issued before | |
3109 | the calculated GP register would otherwise be ready. | |
3110 | ||
3111 | Any such jsr insn can be replaced by a bsr if it is in range. | |
3112 | ||
3113 | This would mean that we'd have to _add_ relocations, the pain of | |
3114 | which gives one pause. */ | |
3115 | ||
3116 | return TRUE; | |
3117 | } | |
3118 | ||
3119 | static bfd_vma | |
3120 | elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval) | |
3121 | { | |
3122 | /* If the function has the same gp, and we can identify that the | |
3123 | function does not use its function pointer, we can eliminate the | |
3124 | address load. */ | |
3125 | ||
3126 | /* If the symbol is marked NOPV, we are being told the function never | |
3127 | needs its procedure value. */ | |
3128 | if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV) | |
3129 | return symval; | |
3130 | ||
3131 | /* If the symbol is marked STD_GP, we are being told the function does | |
3132 | a normal ldgp in the first two words. */ | |
3133 | else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD) | |
3134 | ; | |
3135 | ||
3136 | /* Otherwise, we may be able to identify a GP load in the first two | |
3137 | words, which we can then skip. */ | |
3138 | else | |
3139 | { | |
3140 | Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; | |
3141 | bfd_vma ofs; | |
3142 | ||
3143 | /* Load the relocations from the section that the target symbol is in. */ | |
3144 | if (info->sec == info->tsec) | |
3145 | { | |
3146 | tsec_relocs = info->relocs; | |
3147 | tsec_relend = info->relend; | |
3148 | tsec_free = NULL; | |
3149 | } | |
3150 | else | |
3151 | { | |
3152 | tsec_relocs = (_bfd_elf_link_read_relocs | |
3153 | (info->abfd, info->tsec, NULL, | |
3154 | (Elf_Internal_Rela *) NULL, | |
3155 | info->link_info->keep_memory)); | |
3156 | if (tsec_relocs == NULL) | |
3157 | return 0; | |
3158 | tsec_relend = tsec_relocs + info->tsec->reloc_count; | |
3159 | tsec_free = (elf_section_data (info->tsec)->relocs == tsec_relocs | |
3160 | ? NULL | |
3161 | : tsec_relocs); | |
3162 | } | |
3163 | ||
3164 | /* Recover the symbol's offset within the section. */ | |
3165 | ofs = (symval - info->tsec->output_section->vma | |
3166 | - info->tsec->output_offset); | |
3167 | ||
3168 | /* Look for a GPDISP reloc. */ | |
3169 | gpdisp = (elf64_alpha_find_reloc_at_ofs | |
3170 | (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); | |
3171 | ||
3172 | if (!gpdisp || gpdisp->r_addend != 4) | |
3173 | { | |
3174 | if (tsec_free) | |
3175 | free (tsec_free); | |
3176 | return 0; | |
3177 | } | |
3178 | if (tsec_free) | |
3179 | free (tsec_free); | |
3180 | } | |
3181 | ||
3182 | /* We've now determined that we can skip an initial gp load. Verify | |
3183 | that the call and the target use the same gp. */ | |
3184 | if (info->link_info->output_bfd->xvec != info->tsec->owner->xvec | |
3185 | || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) | |
3186 | return 0; | |
3187 | ||
3188 | return symval + 8; | |
3189 | } | |
3190 | ||
3191 | static bfd_boolean | |
3192 | elf64_alpha_relax_with_lituse (struct alpha_relax_info *info, | |
3193 | bfd_vma symval, Elf_Internal_Rela *irel) | |
3194 | { | |
3195 | Elf_Internal_Rela *urel, *erel, *irelend = info->relend; | |
3196 | int flags; | |
3197 | bfd_signed_vma disp; | |
3198 | bfd_boolean fits16; | |
3199 | bfd_boolean fits32; | |
3200 | bfd_boolean lit_reused = FALSE; | |
3201 | bfd_boolean all_optimized = TRUE; | |
3202 | bfd_boolean changed_contents; | |
3203 | bfd_boolean changed_relocs; | |
3204 | bfd_byte *contents = info->contents; | |
3205 | bfd *abfd = info->abfd; | |
3206 | bfd_vma sec_output_vma; | |
3207 | unsigned int lit_insn; | |
3208 | int relax_pass; | |
3209 | ||
3210 | lit_insn = bfd_get_32 (abfd, contents + irel->r_offset); | |
3211 | if (lit_insn >> 26 != OP_LDQ) | |
3212 | { | |
3213 | _bfd_error_handler | |
3214 | /* xgettext:c-format */ | |
3215 | (_("%pB: %pA+%#" PRIx64 ": warning: " | |
3216 | "%s relocation against unexpected insn"), | |
3217 | abfd, info->sec, (uint64_t) irel->r_offset, "LITERAL"); | |
3218 | return TRUE; | |
3219 | } | |
3220 | ||
3221 | /* Can't relax dynamic symbols. */ | |
3222 | if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) | |
3223 | return TRUE; | |
3224 | ||
3225 | changed_contents = info->changed_contents; | |
3226 | changed_relocs = info->changed_relocs; | |
3227 | sec_output_vma = info->sec->output_section->vma + info->sec->output_offset; | |
3228 | relax_pass = info->link_info->relax_pass; | |
3229 | ||
3230 | /* Summarize how this particular LITERAL is used. */ | |
3231 | for (erel = irel+1, flags = 0; erel < irelend; ++erel) | |
3232 | { | |
3233 | if (ELF64_R_TYPE (erel->r_info) != R_ALPHA_LITUSE) | |
3234 | break; | |
3235 | if (erel->r_addend <= 6) | |
3236 | flags |= 1 << erel->r_addend; | |
3237 | } | |
3238 | ||
3239 | /* A little preparation for the loop... */ | |
3240 | disp = symval - info->gp; | |
3241 | ||
3242 | for (urel = irel+1; urel < erel; ++urel) | |
3243 | { | |
3244 | bfd_vma urel_r_offset = urel->r_offset; | |
3245 | unsigned int insn; | |
3246 | int insn_disp; | |
3247 | bfd_signed_vma xdisp; | |
3248 | Elf_Internal_Rela nrel; | |
3249 | ||
3250 | insn = bfd_get_32 (abfd, contents + urel_r_offset); | |
3251 | ||
3252 | switch (urel->r_addend) | |
3253 | { | |
3254 | case LITUSE_ALPHA_ADDR: | |
3255 | default: | |
3256 | /* This type is really just a placeholder to note that all | |
3257 | uses cannot be optimized, but to still allow some. */ | |
3258 | all_optimized = FALSE; | |
3259 | break; | |
3260 | ||
3261 | case LITUSE_ALPHA_BASE: | |
3262 | /* We may only create GPREL relocs during the second pass. */ | |
3263 | if (relax_pass == 0) | |
3264 | { | |
3265 | all_optimized = FALSE; | |
3266 | break; | |
3267 | } | |
3268 | ||
3269 | /* We can always optimize 16-bit displacements. */ | |
3270 | ||
3271 | /* Extract the displacement from the instruction, sign-extending | |
3272 | it if necessary, then test whether it is within 16 or 32 bits | |
3273 | displacement from GP. */ | |
3274 | insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000; | |
3275 | ||
3276 | xdisp = disp + insn_disp; | |
3277 | fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000); | |
3278 | fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 | |
3279 | && xdisp < 0x7fff8000); | |
3280 | ||
3281 | if (fits16) | |
3282 | { | |
3283 | /* Take the op code and dest from this insn, take the base | |
3284 | register from the literal insn. Leave the offset alone. */ | |
3285 | insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000); | |
3286 | bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); | |
3287 | changed_contents = TRUE; | |
3288 | ||
3289 | nrel = *urel; | |
3290 | nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), | |
3291 | R_ALPHA_GPREL16); | |
3292 | nrel.r_addend = irel->r_addend; | |
3293 | ||
3294 | /* As we adjust, move the reloc to the end so that we don't | |
3295 | break the LITERAL+LITUSE chain. */ | |
3296 | if (urel < --erel) | |
3297 | *urel-- = *erel; | |
3298 | *erel = nrel; | |
3299 | changed_relocs = TRUE; | |
3300 | } | |
3301 | ||
3302 | /* If all mem+byte, we can optimize 32-bit mem displacements. */ | |
3303 | else if (fits32 && !(flags & ~6)) | |
3304 | { | |
3305 | /* FIXME: sanity check that lit insn Ra is mem insn Rb. */ | |
3306 | ||
3307 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), | |
3308 | R_ALPHA_GPRELHIGH); | |
3309 | lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000); | |
3310 | bfd_put_32 (abfd, (bfd_vma) lit_insn, contents + irel->r_offset); | |
3311 | lit_reused = TRUE; | |
3312 | changed_contents = TRUE; | |
3313 | ||
3314 | /* Since all relocs must be optimized, don't bother swapping | |
3315 | this relocation to the end. */ | |
3316 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), | |
3317 | R_ALPHA_GPRELLOW); | |
3318 | urel->r_addend = irel->r_addend; | |
3319 | changed_relocs = TRUE; | |
3320 | } | |
3321 | else | |
3322 | all_optimized = FALSE; | |
3323 | break; | |
3324 | ||
3325 | case LITUSE_ALPHA_BYTOFF: | |
3326 | /* We can always optimize byte instructions. */ | |
3327 | ||
3328 | /* FIXME: sanity check the insn for byte op. Check that the | |
3329 | literal dest reg is indeed Rb in the byte insn. */ | |
3330 | ||
3331 | insn &= ~ (unsigned) 0x001ff000; | |
3332 | insn |= ((symval & 7) << 13) | 0x1000; | |
3333 | bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); | |
3334 | changed_contents = TRUE; | |
3335 | ||
3336 | nrel = *urel; | |
3337 | nrel.r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3338 | nrel.r_addend = 0; | |
3339 | ||
3340 | /* As we adjust, move the reloc to the end so that we don't | |
3341 | break the LITERAL+LITUSE chain. */ | |
3342 | if (urel < --erel) | |
3343 | *urel-- = *erel; | |
3344 | *erel = nrel; | |
3345 | changed_relocs = TRUE; | |
3346 | break; | |
3347 | ||
3348 | case LITUSE_ALPHA_JSR: | |
3349 | case LITUSE_ALPHA_TLSGD: | |
3350 | case LITUSE_ALPHA_TLSLDM: | |
3351 | case LITUSE_ALPHA_JSRDIRECT: | |
3352 | { | |
3353 | bfd_vma optdest, org; | |
3354 | bfd_signed_vma odisp; | |
3355 | ||
3356 | /* For undefined weak symbols, we're mostly interested in getting | |
3357 | rid of the got entry whenever possible, so optimize this to a | |
3358 | use of the zero register. */ | |
3359 | if (info->h && info->h->root.root.type == bfd_link_hash_undefweak) | |
3360 | { | |
3361 | insn |= 31 << 16; | |
3362 | bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); | |
3363 | ||
3364 | changed_contents = TRUE; | |
3365 | break; | |
3366 | } | |
3367 | ||
3368 | /* If not zero, place to jump without needing pv. */ | |
3369 | optdest = elf64_alpha_relax_opt_call (info, symval); | |
3370 | org = sec_output_vma + urel_r_offset + 4; | |
3371 | odisp = (optdest ? optdest : symval) - org; | |
3372 | ||
3373 | if (odisp >= -0x400000 && odisp < 0x400000) | |
3374 | { | |
3375 | Elf_Internal_Rela *xrel; | |
3376 | ||
3377 | /* Preserve branch prediction call stack when possible. */ | |
3378 | if ((insn & INSN_JSR_MASK) == INSN_JSR) | |
3379 | insn = (OP_BSR << 26) | (insn & 0x03e00000); | |
3380 | else | |
3381 | insn = (OP_BR << 26) | (insn & 0x03e00000); | |
3382 | bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); | |
3383 | changed_contents = TRUE; | |
3384 | ||
3385 | nrel = *urel; | |
3386 | nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), | |
3387 | R_ALPHA_BRADDR); | |
3388 | nrel.r_addend = irel->r_addend; | |
3389 | ||
3390 | if (optdest) | |
3391 | nrel.r_addend += optdest - symval; | |
3392 | else | |
3393 | all_optimized = FALSE; | |
3394 | ||
3395 | /* Kill any HINT reloc that might exist for this insn. */ | |
3396 | xrel = (elf64_alpha_find_reloc_at_ofs | |
3397 | (info->relocs, info->relend, urel_r_offset, | |
3398 | R_ALPHA_HINT)); | |
3399 | if (xrel) | |
3400 | xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3401 | ||
3402 | /* As we adjust, move the reloc to the end so that we don't | |
3403 | break the LITERAL+LITUSE chain. */ | |
3404 | if (urel < --erel) | |
3405 | *urel-- = *erel; | |
3406 | *erel = nrel; | |
3407 | ||
3408 | info->changed_relocs = TRUE; | |
3409 | } | |
3410 | else | |
3411 | all_optimized = FALSE; | |
3412 | ||
3413 | /* Even if the target is not in range for a direct branch, | |
3414 | if we share a GP, we can eliminate the gp reload. */ | |
3415 | if (optdest) | |
3416 | { | |
3417 | Elf_Internal_Rela *gpdisp | |
3418 | = (elf64_alpha_find_reloc_at_ofs | |
3419 | (info->relocs, irelend, urel_r_offset + 4, | |
3420 | R_ALPHA_GPDISP)); | |
3421 | if (gpdisp) | |
3422 | { | |
3423 | bfd_byte *p_ldah = contents + gpdisp->r_offset; | |
3424 | bfd_byte *p_lda = p_ldah + gpdisp->r_addend; | |
3425 | unsigned int ldah = bfd_get_32 (abfd, p_ldah); | |
3426 | unsigned int lda = bfd_get_32 (abfd, p_lda); | |
3427 | ||
3428 | /* Verify that the instruction is "ldah $29,0($26)". | |
3429 | Consider a function that ends in a noreturn call, | |
3430 | and that the next function begins with an ldgp, | |
3431 | and that by accident there is no padding between. | |
3432 | In that case the insn would use $27 as the base. */ | |
3433 | if (ldah == 0x27ba0000 && lda == 0x23bd0000) | |
3434 | { | |
3435 | bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_ldah); | |
3436 | bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_lda); | |
3437 | ||
3438 | gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3439 | changed_contents = TRUE; | |
3440 | changed_relocs = TRUE; | |
3441 | } | |
3442 | } | |
3443 | } | |
3444 | } | |
3445 | break; | |
3446 | } | |
3447 | } | |
3448 | ||
3449 | /* If we reused the literal instruction, we must have optimized all. */ | |
3450 | BFD_ASSERT(!lit_reused || all_optimized); | |
3451 | ||
3452 | /* If all cases were optimized, we can reduce the use count on this | |
3453 | got entry by one, possibly eliminating it. */ | |
3454 | if (all_optimized) | |
3455 | { | |
3456 | if (--info->gotent->use_count == 0) | |
3457 | { | |
3458 | int sz = alpha_got_entry_size (R_ALPHA_LITERAL); | |
3459 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; | |
3460 | if (!info->h) | |
3461 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; | |
3462 | } | |
3463 | ||
3464 | /* If the literal instruction is no longer needed (it may have been | |
3465 | reused. We can eliminate it. */ | |
3466 | /* ??? For now, I don't want to deal with compacting the section, | |
3467 | so just nop it out. */ | |
3468 | if (!lit_reused) | |
3469 | { | |
3470 | irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3471 | changed_relocs = TRUE; | |
3472 | ||
3473 | bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, contents + irel->r_offset); | |
3474 | changed_contents = TRUE; | |
3475 | } | |
3476 | } | |
3477 | ||
3478 | info->changed_contents = changed_contents; | |
3479 | info->changed_relocs = changed_relocs; | |
3480 | ||
3481 | if (all_optimized || relax_pass == 0) | |
3482 | return TRUE; | |
3483 | return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL); | |
3484 | } | |
3485 | ||
3486 | static bfd_boolean | |
3487 | elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval, | |
3488 | Elf_Internal_Rela *irel, bfd_boolean is_gd) | |
3489 | { | |
3490 | bfd_byte *pos[5]; | |
3491 | unsigned int insn, tlsgd_reg; | |
3492 | Elf_Internal_Rela *gpdisp, *hint; | |
3493 | bfd_boolean dynamic, use_gottprel; | |
3494 | unsigned long new_symndx; | |
3495 | ||
3496 | dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info); | |
3497 | ||
3498 | /* If a TLS symbol is accessed using IE at least once, there is no point | |
3499 | to use dynamic model for it. */ | |
3500 | if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE)) | |
3501 | ; | |
3502 | ||
3503 | /* If the symbol is local, and we've already committed to DF_STATIC_TLS, | |
3504 | then we might as well relax to IE. */ | |
3505 | else if (bfd_link_pic (info->link_info) && !dynamic | |
3506 | && (info->link_info->flags & DF_STATIC_TLS)) | |
3507 | ; | |
3508 | ||
3509 | /* Otherwise we must be building an executable to do anything. */ | |
3510 | else if (bfd_link_pic (info->link_info)) | |
3511 | return TRUE; | |
3512 | ||
3513 | /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and | |
3514 | the matching LITUSE_TLS relocations. */ | |
3515 | if (irel + 2 >= info->relend) | |
3516 | return TRUE; | |
3517 | if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL | |
3518 | || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE | |
3519 | || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM)) | |
3520 | return TRUE; | |
3521 | ||
3522 | /* There must be a GPDISP relocation positioned immediately after the | |
3523 | LITUSE relocation. */ | |
3524 | gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, | |
3525 | irel[2].r_offset + 4, R_ALPHA_GPDISP); | |
3526 | if (!gpdisp) | |
3527 | return TRUE; | |
3528 | ||
3529 | pos[0] = info->contents + irel[0].r_offset; | |
3530 | pos[1] = info->contents + irel[1].r_offset; | |
3531 | pos[2] = info->contents + irel[2].r_offset; | |
3532 | pos[3] = info->contents + gpdisp->r_offset; | |
3533 | pos[4] = pos[3] + gpdisp->r_addend; | |
3534 | ||
3535 | /* Beware of the compiler hoisting part of the sequence out a loop | |
3536 | and adjusting the destination register for the TLSGD insn. If this | |
3537 | happens, there will be a move into $16 before the JSR insn, so only | |
3538 | transformations of the first insn pair should use this register. */ | |
3539 | tlsgd_reg = bfd_get_32 (info->abfd, pos[0]); | |
3540 | tlsgd_reg = (tlsgd_reg >> 21) & 31; | |
3541 | ||
3542 | /* Generally, the positions are not allowed to be out of order, lest the | |
3543 | modified insn sequence have different register lifetimes. We can make | |
3544 | an exception when pos 1 is adjacent to pos 0. */ | |
3545 | if (pos[1] + 4 == pos[0]) | |
3546 | { | |
3547 | bfd_byte *tmp = pos[0]; | |
3548 | pos[0] = pos[1]; | |
3549 | pos[1] = tmp; | |
3550 | } | |
3551 | if (pos[1] >= pos[2] || pos[2] >= pos[3]) | |
3552 | return TRUE; | |
3553 | ||
3554 | /* Reduce the use count on the LITERAL relocation. Do this before we | |
3555 | smash the symndx when we adjust the relocations below. */ | |
3556 | { | |
3557 | struct alpha_elf_got_entry *lit_gotent; | |
3558 | struct alpha_elf_link_hash_entry *lit_h; | |
3559 | unsigned long indx; | |
3560 | ||
3561 | BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info); | |
3562 | indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info; | |
3563 | lit_h = alpha_elf_sym_hashes (info->abfd)[indx]; | |
3564 | ||
3565 | while (lit_h->root.root.type == bfd_link_hash_indirect | |
3566 | || lit_h->root.root.type == bfd_link_hash_warning) | |
3567 | lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link; | |
3568 | ||
3569 | for (lit_gotent = lit_h->got_entries; lit_gotent ; | |
3570 | lit_gotent = lit_gotent->next) | |
3571 | if (lit_gotent->gotobj == info->gotobj | |
3572 | && lit_gotent->reloc_type == R_ALPHA_LITERAL | |
3573 | && lit_gotent->addend == irel[1].r_addend) | |
3574 | break; | |
3575 | BFD_ASSERT (lit_gotent); | |
3576 | ||
3577 | if (--lit_gotent->use_count == 0) | |
3578 | { | |
3579 | int sz = alpha_got_entry_size (R_ALPHA_LITERAL); | |
3580 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; | |
3581 | } | |
3582 | } | |
3583 | ||
3584 | /* Change | |
3585 | ||
3586 | lda $16,x($gp) !tlsgd!1 | |
3587 | ldq $27,__tls_get_addr($gp) !literal!1 | |
3588 | jsr $26,($27),__tls_get_addr !lituse_tlsgd!1 | |
3589 | ldah $29,0($26) !gpdisp!2 | |
3590 | lda $29,0($29) !gpdisp!2 | |
3591 | to | |
3592 | ldq $16,x($gp) !gottprel | |
3593 | unop | |
3594 | call_pal rduniq | |
3595 | addq $16,$0,$0 | |
3596 | unop | |
3597 | or the first pair to | |
3598 | lda $16,x($gp) !tprel | |
3599 | unop | |
3600 | or | |
3601 | ldah $16,x($gp) !tprelhi | |
3602 | lda $16,x($16) !tprello | |
3603 | ||
3604 | as appropriate. */ | |
3605 | ||
3606 | use_gottprel = FALSE; | |
3607 | new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF; | |
3608 | ||
3609 | /* Some compilers warn about a Boolean-looking expression being | |
3610 | used in a switch. The explicit cast silences them. */ | |
3611 | switch ((int) (!dynamic && !bfd_link_pic (info->link_info))) | |
3612 | { | |
3613 | case 1: | |
3614 | { | |
3615 | bfd_vma tp_base; | |
3616 | bfd_signed_vma disp; | |
3617 | ||
3618 | BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); | |
3619 | tp_base = alpha_get_tprel_base (info->link_info); | |
3620 | disp = symval - tp_base; | |
3621 | ||
3622 | if (disp >= -0x8000 && disp < 0x8000) | |
3623 | { | |
3624 | insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16); | |
3625 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); | |
3626 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); | |
3627 | ||
3628 | irel[0].r_offset = pos[0] - info->contents; | |
3629 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16); | |
3630 | irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3631 | break; | |
3632 | } | |
3633 | else if (disp >= -(bfd_signed_vma) 0x80000000 | |
3634 | && disp < (bfd_signed_vma) 0x7fff8000 | |
3635 | && pos[0] + 4 == pos[1]) | |
3636 | { | |
3637 | insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16); | |
3638 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); | |
3639 | insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16); | |
3640 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]); | |
3641 | ||
3642 | irel[0].r_offset = pos[0] - info->contents; | |
3643 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI); | |
3644 | irel[1].r_offset = pos[1] - info->contents; | |
3645 | irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO); | |
3646 | break; | |
3647 | } | |
3648 | } | |
3649 | /* FALLTHRU */ | |
3650 | ||
3651 | default: | |
3652 | use_gottprel = TRUE; | |
3653 | ||
3654 | insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16); | |
3655 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); | |
3656 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); | |
3657 | ||
3658 | irel[0].r_offset = pos[0] - info->contents; | |
3659 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL); | |
3660 | irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3661 | break; | |
3662 | } | |
3663 | ||
3664 | bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]); | |
3665 | ||
3666 | insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0); | |
3667 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]); | |
3668 | ||
3669 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]); | |
3670 | ||
3671 | irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3672 | gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3673 | ||
3674 | hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, | |
3675 | irel[2].r_offset, R_ALPHA_HINT); | |
3676 | if (hint) | |
3677 | hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); | |
3678 | ||
3679 | info->changed_contents = TRUE; | |
3680 | info->changed_relocs = TRUE; | |
3681 | ||
3682 | /* Reduce the use count on the TLSGD/TLSLDM relocation. */ | |
3683 | if (--info->gotent->use_count == 0) | |
3684 | { | |
3685 | int sz = alpha_got_entry_size (info->gotent->reloc_type); | |
3686 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; | |
3687 | if (!info->h) | |
3688 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; | |
3689 | } | |
3690 | ||
3691 | /* If we've switched to a GOTTPREL relocation, increment the reference | |
3692 | count on that got entry. */ | |
3693 | if (use_gottprel) | |
3694 | { | |
3695 | struct alpha_elf_got_entry *tprel_gotent; | |
3696 | ||
3697 | for (tprel_gotent = *info->first_gotent; tprel_gotent ; | |
3698 | tprel_gotent = tprel_gotent->next) | |
3699 | if (tprel_gotent->gotobj == info->gotobj | |
3700 | && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL | |
3701 | && tprel_gotent->addend == irel->r_addend) | |
3702 | break; | |
3703 | if (tprel_gotent) | |
3704 | tprel_gotent->use_count++; | |
3705 | else | |
3706 | { | |
3707 | if (info->gotent->use_count == 0) | |
3708 | tprel_gotent = info->gotent; | |
3709 | else | |
3710 | { | |
3711 | tprel_gotent = (struct alpha_elf_got_entry *) | |
3712 | bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry)); | |
3713 | if (!tprel_gotent) | |
3714 | return FALSE; | |
3715 | ||
3716 | tprel_gotent->next = *info->first_gotent; | |
3717 | *info->first_gotent = tprel_gotent; | |
3718 | ||
3719 | tprel_gotent->gotobj = info->gotobj; | |
3720 | tprel_gotent->addend = irel->r_addend; | |
3721 | tprel_gotent->got_offset = -1; | |
3722 | tprel_gotent->reloc_done = 0; | |
3723 | tprel_gotent->reloc_xlated = 0; | |
3724 | } | |
3725 | ||
3726 | tprel_gotent->use_count = 1; | |
3727 | tprel_gotent->reloc_type = R_ALPHA_GOTTPREL; | |
3728 | } | |
3729 | } | |
3730 | ||
3731 | return TRUE; | |
3732 | } | |
3733 | ||
3734 | static bfd_boolean | |
3735 | elf64_alpha_relax_section (bfd *abfd, asection *sec, | |
3736 | struct bfd_link_info *link_info, bfd_boolean *again) | |
3737 | { | |
3738 | Elf_Internal_Shdr *symtab_hdr; | |
3739 | Elf_Internal_Rela *internal_relocs; | |
3740 | Elf_Internal_Rela *irel, *irelend; | |
3741 | Elf_Internal_Sym *isymbuf = NULL; | |
3742 | struct alpha_elf_got_entry **local_got_entries; | |
3743 | struct alpha_relax_info info; | |
3744 | struct alpha_elf_link_hash_table * htab; | |
3745 | int relax_pass; | |
3746 | ||
3747 | htab = alpha_elf_hash_table (link_info); | |
3748 | if (htab == NULL) | |
3749 | return FALSE; | |
3750 | ||
3751 | /* There's nothing to change, yet. */ | |
3752 | *again = FALSE; | |
3753 | ||
3754 | if (bfd_link_relocatable (link_info) | |
3755 | || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC)) | |
3756 | != (SEC_CODE | SEC_RELOC | SEC_ALLOC)) | |
3757 | || sec->reloc_count == 0) | |
3758 | return TRUE; | |
3759 | ||
3760 | BFD_ASSERT (is_alpha_elf (abfd)); | |
3761 | relax_pass = link_info->relax_pass; | |
3762 | ||
3763 | /* Make sure our GOT and PLT tables are up-to-date. */ | |
3764 | if (htab->relax_trip != link_info->relax_trip) | |
3765 | { | |
3766 | htab->relax_trip = link_info->relax_trip; | |
3767 | ||
3768 | /* This should never fail after the initial round, since the only error | |
3769 | is GOT overflow, and relaxation only shrinks the table. However, we | |
3770 | may only merge got sections during the first pass. If we merge | |
3771 | sections after we've created GPREL relocs, the GP for the merged | |
3772 | section backs up which may put the relocs out of range. */ | |
3773 | if (!elf64_alpha_size_got_sections (link_info, relax_pass == 0)) | |
3774 | abort (); | |
3775 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
3776 | { | |
3777 | elf64_alpha_size_plt_section (link_info); | |
3778 | elf64_alpha_size_rela_got_section (link_info); | |
3779 | } | |
3780 | } | |
3781 | ||
3782 | symtab_hdr = &elf_symtab_hdr (abfd); | |
3783 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; | |
3784 | ||
3785 | /* Load the relocations for this section. */ | |
3786 | internal_relocs = (_bfd_elf_link_read_relocs | |
3787 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3788 | link_info->keep_memory)); | |
3789 | if (internal_relocs == NULL) | |
3790 | return FALSE; | |
3791 | ||
3792 | memset(&info, 0, sizeof (info)); | |
3793 | info.abfd = abfd; | |
3794 | info.sec = sec; | |
3795 | info.link_info = link_info; | |
3796 | info.symtab_hdr = symtab_hdr; | |
3797 | info.relocs = internal_relocs; | |
3798 | info.relend = irelend = internal_relocs + sec->reloc_count; | |
3799 | ||
3800 | /* Find the GP for this object. Do not store the result back via | |
3801 | _bfd_set_gp_value, since this could change again before final. */ | |
3802 | info.gotobj = alpha_elf_tdata (abfd)->gotobj; | |
3803 | if (info.gotobj) | |
3804 | { | |
3805 | asection *sgot = alpha_elf_tdata (info.gotobj)->got; | |
3806 | info.gp = (sgot->output_section->vma | |
3807 | + sgot->output_offset | |
3808 | + 0x8000); | |
3809 | } | |
3810 | ||
3811 | /* Get the section contents. */ | |
3812 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3813 | info.contents = elf_section_data (sec)->this_hdr.contents; | |
3814 | else | |
3815 | { | |
3816 | if (!bfd_malloc_and_get_section (abfd, sec, &info.contents)) | |
3817 | goto error_return; | |
3818 | } | |
3819 | ||
3820 | for (irel = internal_relocs; irel < irelend; irel++) | |
3821 | { | |
3822 | bfd_vma symval; | |
3823 | struct alpha_elf_got_entry *gotent; | |
3824 | unsigned long r_type = ELF64_R_TYPE (irel->r_info); | |
3825 | unsigned long r_symndx = ELF64_R_SYM (irel->r_info); | |
3826 | ||
3827 | /* Early exit for unhandled or unrelaxable relocations. */ | |
3828 | if (r_type != R_ALPHA_LITERAL) | |
3829 | { | |
3830 | /* We complete everything except LITERAL in the first pass. */ | |
3831 | if (relax_pass != 0) | |
3832 | continue; | |
3833 | if (r_type == R_ALPHA_TLSLDM) | |
3834 | { | |
3835 | /* The symbol for a TLSLDM reloc is ignored. Collapse the | |
3836 | reloc to the STN_UNDEF (0) symbol so that they all match. */ | |
3837 | r_symndx = STN_UNDEF; | |
3838 | } | |
3839 | else if (r_type != R_ALPHA_GOTDTPREL | |
3840 | && r_type != R_ALPHA_GOTTPREL | |
3841 | && r_type != R_ALPHA_TLSGD) | |
3842 | continue; | |
3843 | } | |
3844 | ||
3845 | /* Get the value of the symbol referred to by the reloc. */ | |
3846 | if (r_symndx < symtab_hdr->sh_info) | |
3847 | { | |
3848 | /* A local symbol. */ | |
3849 | Elf_Internal_Sym *isym; | |
3850 | ||
3851 | /* Read this BFD's local symbols. */ | |
3852 | if (isymbuf == NULL) | |
3853 | { | |
3854 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
3855 | if (isymbuf == NULL) | |
3856 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
3857 | symtab_hdr->sh_info, 0, | |
3858 | NULL, NULL, NULL); | |
3859 | if (isymbuf == NULL) | |
3860 | goto error_return; | |
3861 | } | |
3862 | ||
3863 | isym = isymbuf + r_symndx; | |
3864 | ||
3865 | /* Given the symbol for a TLSLDM reloc is ignored, this also | |
3866 | means forcing the symbol value to the tp base. */ | |
3867 | if (r_type == R_ALPHA_TLSLDM) | |
3868 | { | |
3869 | info.tsec = bfd_abs_section_ptr; | |
3870 | symval = alpha_get_tprel_base (info.link_info); | |
3871 | } | |
3872 | else | |
3873 | { | |
3874 | symval = isym->st_value; | |
3875 | if (isym->st_shndx == SHN_UNDEF) | |
3876 | continue; | |
3877 | else if (isym->st_shndx == SHN_ABS) | |
3878 | info.tsec = bfd_abs_section_ptr; | |
3879 | else if (isym->st_shndx == SHN_COMMON) | |
3880 | info.tsec = bfd_com_section_ptr; | |
3881 | else | |
3882 | info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
3883 | } | |
3884 | ||
3885 | info.h = NULL; | |
3886 | info.other = isym->st_other; | |
3887 | if (local_got_entries) | |
3888 | info.first_gotent = &local_got_entries[r_symndx]; | |
3889 | else | |
3890 | { | |
3891 | info.first_gotent = &info.gotent; | |
3892 | info.gotent = NULL; | |
3893 | } | |
3894 | } | |
3895 | else | |
3896 | { | |
3897 | unsigned long indx; | |
3898 | struct alpha_elf_link_hash_entry *h; | |
3899 | ||
3900 | indx = r_symndx - symtab_hdr->sh_info; | |
3901 | h = alpha_elf_sym_hashes (abfd)[indx]; | |
3902 | BFD_ASSERT (h != NULL); | |
3903 | ||
3904 | while (h->root.root.type == bfd_link_hash_indirect | |
3905 | || h->root.root.type == bfd_link_hash_warning) | |
3906 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; | |
3907 | ||
3908 | /* If the symbol is undefined, we can't do anything with it. */ | |
3909 | if (h->root.root.type == bfd_link_hash_undefined) | |
3910 | continue; | |
3911 | ||
3912 | /* If the symbol isn't defined in the current module, | |
3913 | again we can't do anything. */ | |
3914 | if (h->root.root.type == bfd_link_hash_undefweak) | |
3915 | { | |
3916 | info.tsec = bfd_abs_section_ptr; | |
3917 | symval = 0; | |
3918 | } | |
3919 | else if (!h->root.def_regular) | |
3920 | { | |
3921 | /* Except for TLSGD relocs, which can sometimes be | |
3922 | relaxed to GOTTPREL relocs. */ | |
3923 | if (r_type != R_ALPHA_TLSGD) | |
3924 | continue; | |
3925 | info.tsec = bfd_abs_section_ptr; | |
3926 | symval = 0; | |
3927 | } | |
3928 | else | |
3929 | { | |
3930 | info.tsec = h->root.root.u.def.section; | |
3931 | symval = h->root.root.u.def.value; | |
3932 | } | |
3933 | ||
3934 | info.h = h; | |
3935 | info.other = h->root.other; | |
3936 | info.first_gotent = &h->got_entries; | |
3937 | } | |
3938 | ||
3939 | /* Search for the got entry to be used by this relocation. */ | |
3940 | for (gotent = *info.first_gotent; gotent ; gotent = gotent->next) | |
3941 | if (gotent->gotobj == info.gotobj | |
3942 | && gotent->reloc_type == r_type | |
3943 | && gotent->addend == irel->r_addend) | |
3944 | break; | |
3945 | info.gotent = gotent; | |
3946 | ||
3947 | symval += info.tsec->output_section->vma + info.tsec->output_offset; | |
3948 | symval += irel->r_addend; | |
3949 | ||
3950 | switch (r_type) | |
3951 | { | |
3952 | case R_ALPHA_LITERAL: | |
3953 | BFD_ASSERT(info.gotent != NULL); | |
3954 | ||
3955 | /* If there exist LITUSE relocations immediately following, this | |
3956 | opens up all sorts of interesting optimizations, because we | |
3957 | now know every location that this address load is used. */ | |
3958 | if (irel+1 < irelend | |
3959 | && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE) | |
3960 | { | |
3961 | if (!elf64_alpha_relax_with_lituse (&info, symval, irel)) | |
3962 | goto error_return; | |
3963 | } | |
3964 | else | |
3965 | { | |
3966 | if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) | |
3967 | goto error_return; | |
3968 | } | |
3969 | break; | |
3970 | ||
3971 | case R_ALPHA_GOTDTPREL: | |
3972 | case R_ALPHA_GOTTPREL: | |
3973 | BFD_ASSERT(info.gotent != NULL); | |
3974 | if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) | |
3975 | goto error_return; | |
3976 | break; | |
3977 | ||
3978 | case R_ALPHA_TLSGD: | |
3979 | case R_ALPHA_TLSLDM: | |
3980 | BFD_ASSERT(info.gotent != NULL); | |
3981 | if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel, | |
3982 | r_type == R_ALPHA_TLSGD)) | |
3983 | goto error_return; | |
3984 | break; | |
3985 | } | |
3986 | } | |
3987 | ||
3988 | if (isymbuf != NULL | |
3989 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
3990 | { | |
3991 | if (!link_info->keep_memory) | |
3992 | free (isymbuf); | |
3993 | else | |
3994 | { | |
3995 | /* Cache the symbols for elf_link_input_bfd. */ | |
3996 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
3997 | } | |
3998 | } | |
3999 | ||
4000 | if (info.contents != NULL | |
4001 | && elf_section_data (sec)->this_hdr.contents != info.contents) | |
4002 | { | |
4003 | if (!info.changed_contents && !link_info->keep_memory) | |
4004 | free (info.contents); | |
4005 | else | |
4006 | { | |
4007 | /* Cache the section contents for elf_link_input_bfd. */ | |
4008 | elf_section_data (sec)->this_hdr.contents = info.contents; | |
4009 | } | |
4010 | } | |
4011 | ||
4012 | if (elf_section_data (sec)->relocs != internal_relocs) | |
4013 | { | |
4014 | if (!info.changed_relocs) | |
4015 | free (internal_relocs); | |
4016 | else | |
4017 | elf_section_data (sec)->relocs = internal_relocs; | |
4018 | } | |
4019 | ||
4020 | *again = info.changed_contents || info.changed_relocs; | |
4021 | ||
4022 | return TRUE; | |
4023 | ||
4024 | error_return: | |
4025 | if (isymbuf != NULL | |
4026 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
4027 | free (isymbuf); | |
4028 | if (info.contents != NULL | |
4029 | && elf_section_data (sec)->this_hdr.contents != info.contents) | |
4030 | free (info.contents); | |
4031 | if (internal_relocs != NULL | |
4032 | && elf_section_data (sec)->relocs != internal_relocs) | |
4033 | free (internal_relocs); | |
4034 | return FALSE; | |
4035 | } | |
4036 | \f | |
4037 | /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET) | |
4038 | into the next available slot in SREL. */ | |
4039 | ||
4040 | static void | |
4041 | elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info, | |
4042 | asection *sec, asection *srel, bfd_vma offset, | |
4043 | long dynindx, long rtype, bfd_vma addend) | |
4044 | { | |
4045 | Elf_Internal_Rela outrel; | |
4046 | bfd_byte *loc; | |
4047 | ||
4048 | BFD_ASSERT (srel != NULL); | |
4049 | ||
4050 | outrel.r_info = ELF64_R_INFO (dynindx, rtype); | |
4051 | outrel.r_addend = addend; | |
4052 | ||
4053 | offset = _bfd_elf_section_offset (abfd, info, sec, offset); | |
4054 | if ((offset | 1) != (bfd_vma) -1) | |
4055 | outrel.r_offset = sec->output_section->vma + sec->output_offset + offset; | |
4056 | else | |
4057 | memset (&outrel, 0, sizeof (outrel)); | |
4058 | ||
4059 | loc = srel->contents; | |
4060 | loc += srel->reloc_count++ * sizeof (Elf64_External_Rela); | |
4061 | bfd_elf64_swap_reloca_out (abfd, &outrel, loc); | |
4062 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size); | |
4063 | } | |
4064 | ||
4065 | /* Relocate an Alpha ELF section for a relocatable link. | |
4066 | ||
4067 | We don't have to change anything unless the reloc is against a section | |
4068 | symbol, in which case we have to adjust according to where the section | |
4069 | symbol winds up in the output section. */ | |
4070 | ||
4071 | static bfd_boolean | |
4072 | elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4073 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4074 | bfd *input_bfd, asection *input_section, | |
4075 | bfd_byte *contents ATTRIBUTE_UNUSED, | |
4076 | Elf_Internal_Rela *relocs, | |
4077 | Elf_Internal_Sym *local_syms, | |
4078 | asection **local_sections) | |
4079 | { | |
4080 | unsigned long symtab_hdr_sh_info; | |
4081 | Elf_Internal_Rela *rel; | |
4082 | Elf_Internal_Rela *relend; | |
4083 | struct elf_link_hash_entry **sym_hashes; | |
4084 | bfd_boolean ret_val = TRUE; | |
4085 | ||
4086 | symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info; | |
4087 | sym_hashes = elf_sym_hashes (input_bfd); | |
4088 | ||
4089 | relend = relocs + input_section->reloc_count; | |
4090 | for (rel = relocs; rel < relend; rel++) | |
4091 | { | |
4092 | unsigned long r_symndx; | |
4093 | Elf_Internal_Sym *sym; | |
4094 | asection *sec; | |
4095 | unsigned long r_type; | |
4096 | ||
4097 | r_type = ELF64_R_TYPE (rel->r_info); | |
4098 | if (r_type >= R_ALPHA_max) | |
4099 | { | |
4100 | _bfd_error_handler | |
4101 | /* xgettext:c-format */ | |
4102 | (_("%pB: unsupported relocation type %#x"), | |
4103 | input_bfd, (int) r_type); | |
4104 | bfd_set_error (bfd_error_bad_value); | |
4105 | ret_val = FALSE; | |
4106 | continue; | |
4107 | } | |
4108 | ||
4109 | /* The symbol associated with GPDISP and LITUSE is | |
4110 | immaterial. Only the addend is significant. */ | |
4111 | if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE) | |
4112 | continue; | |
4113 | ||
4114 | r_symndx = ELF64_R_SYM (rel->r_info); | |
4115 | if (r_symndx < symtab_hdr_sh_info) | |
4116 | { | |
4117 | sym = local_syms + r_symndx; | |
4118 | sec = local_sections[r_symndx]; | |
4119 | } | |
4120 | else | |
4121 | { | |
4122 | struct elf_link_hash_entry *h; | |
4123 | ||
4124 | h = sym_hashes[r_symndx - symtab_hdr_sh_info]; | |
4125 | ||
4126 | while (h->root.type == bfd_link_hash_indirect | |
4127 | || h->root.type == bfd_link_hash_warning) | |
4128 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4129 | ||
4130 | if (h->root.type != bfd_link_hash_defined | |
4131 | && h->root.type != bfd_link_hash_defweak) | |
4132 | continue; | |
4133 | ||
4134 | sym = NULL; | |
4135 | sec = h->root.u.def.section; | |
4136 | } | |
4137 | ||
4138 | if (sec != NULL && discarded_section (sec)) | |
4139 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
4140 | rel, 1, relend, | |
4141 | elf64_alpha_howto_table + r_type, 0, | |
4142 | contents); | |
4143 | ||
4144 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
4145 | rel->r_addend += sec->output_offset; | |
4146 | } | |
4147 | ||
4148 | return ret_val; | |
4149 | } | |
4150 | ||
4151 | /* Relocate an Alpha ELF section. */ | |
4152 | ||
4153 | static bfd_boolean | |
4154 | elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info, | |
4155 | bfd *input_bfd, asection *input_section, | |
4156 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
4157 | Elf_Internal_Sym *local_syms, | |
4158 | asection **local_sections) | |
4159 | { | |
4160 | Elf_Internal_Shdr *symtab_hdr; | |
4161 | Elf_Internal_Rela *rel; | |
4162 | Elf_Internal_Rela *relend; | |
4163 | asection *sgot, *srel, *srelgot; | |
4164 | bfd *dynobj, *gotobj; | |
4165 | bfd_vma gp, tp_base, dtp_base; | |
4166 | struct alpha_elf_got_entry **local_got_entries; | |
4167 | bfd_boolean ret_val; | |
4168 | ||
4169 | BFD_ASSERT (is_alpha_elf (input_bfd)); | |
4170 | ||
4171 | /* Handle relocatable links with a smaller loop. */ | |
4172 | if (bfd_link_relocatable (info)) | |
4173 | return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, | |
4174 | input_section, contents, relocs, | |
4175 | local_syms, local_sections); | |
4176 | ||
4177 | /* This is a final link. */ | |
4178 | ||
4179 | ret_val = TRUE; | |
4180 | ||
4181 | symtab_hdr = &elf_symtab_hdr (input_bfd); | |
4182 | ||
4183 | dynobj = elf_hash_table (info)->dynobj; | |
4184 | srelgot = elf_hash_table (info)->srelgot; | |
4185 | ||
4186 | if (input_section->flags & SEC_ALLOC) | |
4187 | { | |
4188 | const char *section_name; | |
4189 | section_name = (bfd_elf_string_from_elf_section | |
4190 | (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, | |
4191 | _bfd_elf_single_rel_hdr (input_section)->sh_name)); | |
4192 | BFD_ASSERT(section_name != NULL); | |
4193 | srel = bfd_get_linker_section (dynobj, section_name); | |
4194 | } | |
4195 | else | |
4196 | srel = NULL; | |
4197 | ||
4198 | /* Find the gp value for this input bfd. */ | |
4199 | gotobj = alpha_elf_tdata (input_bfd)->gotobj; | |
4200 | if (gotobj) | |
4201 | { | |
4202 | sgot = alpha_elf_tdata (gotobj)->got; | |
4203 | gp = _bfd_get_gp_value (gotobj); | |
4204 | if (gp == 0) | |
4205 | { | |
4206 | gp = (sgot->output_section->vma | |
4207 | + sgot->output_offset | |
4208 | + 0x8000); | |
4209 | _bfd_set_gp_value (gotobj, gp); | |
4210 | } | |
4211 | } | |
4212 | else | |
4213 | { | |
4214 | sgot = NULL; | |
4215 | gp = 0; | |
4216 | } | |
4217 | ||
4218 | local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries; | |
4219 | ||
4220 | if (elf_hash_table (info)->tls_sec != NULL) | |
4221 | { | |
4222 | dtp_base = alpha_get_dtprel_base (info); | |
4223 | tp_base = alpha_get_tprel_base (info); | |
4224 | } | |
4225 | else | |
4226 | dtp_base = tp_base = 0; | |
4227 | ||
4228 | relend = relocs + input_section->reloc_count; | |
4229 | for (rel = relocs; rel < relend; rel++) | |
4230 | { | |
4231 | struct alpha_elf_link_hash_entry *h = NULL; | |
4232 | struct alpha_elf_got_entry *gotent; | |
4233 | bfd_reloc_status_type r; | |
4234 | reloc_howto_type *howto; | |
4235 | unsigned long r_symndx; | |
4236 | Elf_Internal_Sym *sym = NULL; | |
4237 | asection *sec = NULL; | |
4238 | bfd_vma value; | |
4239 | bfd_vma addend; | |
4240 | bfd_boolean dynamic_symbol_p; | |
4241 | bfd_boolean unresolved_reloc = FALSE; | |
4242 | bfd_boolean undef_weak_ref = FALSE; | |
4243 | unsigned long r_type; | |
4244 | ||
4245 | r_type = ELF64_R_TYPE(rel->r_info); | |
4246 | if (r_type >= R_ALPHA_max) | |
4247 | { | |
4248 | _bfd_error_handler | |
4249 | /* xgettext:c-format */ | |
4250 | (_("%pB: unsupported relocation type %#x"), | |
4251 | input_bfd, (int) r_type); | |
4252 | bfd_set_error (bfd_error_bad_value); | |
4253 | ret_val = FALSE; | |
4254 | continue; | |
4255 | } | |
4256 | ||
4257 | howto = elf64_alpha_howto_table + r_type; | |
4258 | r_symndx = ELF64_R_SYM(rel->r_info); | |
4259 | ||
4260 | /* The symbol for a TLSLDM reloc is ignored. Collapse the | |
4261 | reloc to the STN_UNDEF (0) symbol so that they all match. */ | |
4262 | if (r_type == R_ALPHA_TLSLDM) | |
4263 | r_symndx = STN_UNDEF; | |
4264 | ||
4265 | if (r_symndx < symtab_hdr->sh_info) | |
4266 | { | |
4267 | asection *msec; | |
4268 | sym = local_syms + r_symndx; | |
4269 | sec = local_sections[r_symndx]; | |
4270 | msec = sec; | |
4271 | value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel); | |
4272 | ||
4273 | /* If this is a tp-relative relocation against sym STN_UNDEF (0), | |
4274 | this is hackery from relax_section. Force the value to | |
4275 | be the tls module base. */ | |
4276 | if (r_symndx == STN_UNDEF | |
4277 | && (r_type == R_ALPHA_TLSLDM | |
4278 | || r_type == R_ALPHA_GOTTPREL | |
4279 | || r_type == R_ALPHA_TPREL64 | |
4280 | || r_type == R_ALPHA_TPRELHI | |
4281 | || r_type == R_ALPHA_TPRELLO | |
4282 | || r_type == R_ALPHA_TPREL16)) | |
4283 | value = dtp_base; | |
4284 | ||
4285 | if (local_got_entries) | |
4286 | gotent = local_got_entries[r_symndx]; | |
4287 | else | |
4288 | gotent = NULL; | |
4289 | ||
4290 | /* Need to adjust local GOT entries' addends for SEC_MERGE | |
4291 | unless it has been done already. */ | |
4292 | if ((sec->flags & SEC_MERGE) | |
4293 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
4294 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE | |
4295 | && gotent | |
4296 | && !gotent->reloc_xlated) | |
4297 | { | |
4298 | struct alpha_elf_got_entry *ent; | |
4299 | ||
4300 | for (ent = gotent; ent; ent = ent->next) | |
4301 | { | |
4302 | ent->reloc_xlated = 1; | |
4303 | if (ent->use_count == 0) | |
4304 | continue; | |
4305 | msec = sec; | |
4306 | ent->addend = | |
4307 | _bfd_merged_section_offset (output_bfd, &msec, | |
4308 | elf_section_data (sec)-> | |
4309 | sec_info, | |
4310 | sym->st_value + ent->addend); | |
4311 | ent->addend -= sym->st_value; | |
4312 | ent->addend += msec->output_section->vma | |
4313 | + msec->output_offset | |
4314 | - sec->output_section->vma | |
4315 | - sec->output_offset; | |
4316 | } | |
4317 | } | |
4318 | ||
4319 | dynamic_symbol_p = FALSE; | |
4320 | } | |
4321 | else | |
4322 | { | |
4323 | bfd_boolean warned, ignored; | |
4324 | struct elf_link_hash_entry *hh; | |
4325 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); | |
4326 | ||
4327 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
4328 | r_symndx, symtab_hdr, sym_hashes, | |
4329 | hh, sec, value, | |
4330 | unresolved_reloc, warned, ignored); | |
4331 | ||
4332 | if (warned) | |
4333 | continue; | |
4334 | ||
4335 | if (value == 0 | |
4336 | && ! unresolved_reloc | |
4337 | && hh->root.type == bfd_link_hash_undefweak) | |
4338 | undef_weak_ref = TRUE; | |
4339 | ||
4340 | h = (struct alpha_elf_link_hash_entry *) hh; | |
4341 | dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info); | |
4342 | gotent = h->got_entries; | |
4343 | } | |
4344 | ||
4345 | if (sec != NULL && discarded_section (sec)) | |
4346 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
4347 | rel, 1, relend, howto, 0, contents); | |
4348 | ||
4349 | addend = rel->r_addend; | |
4350 | value += addend; | |
4351 | ||
4352 | /* Search for the proper got entry. */ | |
4353 | for (; gotent ; gotent = gotent->next) | |
4354 | if (gotent->gotobj == gotobj | |
4355 | && gotent->reloc_type == r_type | |
4356 | && gotent->addend == addend) | |
4357 | break; | |
4358 | ||
4359 | switch (r_type) | |
4360 | { | |
4361 | case R_ALPHA_GPDISP: | |
4362 | { | |
4363 | bfd_byte *p_ldah, *p_lda; | |
4364 | ||
4365 | BFD_ASSERT(gp != 0); | |
4366 | ||
4367 | value = (input_section->output_section->vma | |
4368 | + input_section->output_offset | |
4369 | + rel->r_offset); | |
4370 | ||
4371 | p_ldah = contents + rel->r_offset; | |
4372 | p_lda = p_ldah + rel->r_addend; | |
4373 | ||
4374 | r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value, | |
4375 | p_ldah, p_lda); | |
4376 | } | |
4377 | break; | |
4378 | ||
4379 | case R_ALPHA_LITERAL: | |
4380 | BFD_ASSERT(sgot != NULL); | |
4381 | BFD_ASSERT(gp != 0); | |
4382 | BFD_ASSERT(gotent != NULL); | |
4383 | BFD_ASSERT(gotent->use_count >= 1); | |
4384 | ||
4385 | if (!gotent->reloc_done) | |
4386 | { | |
4387 | gotent->reloc_done = 1; | |
4388 | ||
4389 | bfd_put_64 (output_bfd, value, | |
4390 | sgot->contents + gotent->got_offset); | |
4391 | ||
4392 | /* If the symbol has been forced local, output a | |
4393 | RELATIVE reloc, otherwise it will be handled in | |
4394 | finish_dynamic_symbol. */ | |
4395 | if (bfd_link_pic (info) | |
4396 | && !dynamic_symbol_p | |
4397 | && !undef_weak_ref) | |
4398 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, | |
4399 | gotent->got_offset, 0, | |
4400 | R_ALPHA_RELATIVE, value); | |
4401 | } | |
4402 | ||
4403 | value = (sgot->output_section->vma | |
4404 | + sgot->output_offset | |
4405 | + gotent->got_offset); | |
4406 | value -= gp; | |
4407 | goto default_reloc; | |
4408 | ||
4409 | case R_ALPHA_GPREL32: | |
4410 | case R_ALPHA_GPREL16: | |
4411 | case R_ALPHA_GPRELLOW: | |
4412 | if (dynamic_symbol_p) | |
4413 | { | |
4414 | _bfd_error_handler | |
4415 | /* xgettext:c-format */ | |
4416 | (_("%pB: gp-relative relocation against dynamic symbol %s"), | |
4417 | input_bfd, h->root.root.root.string); | |
4418 | ret_val = FALSE; | |
4419 | } | |
4420 | BFD_ASSERT(gp != 0); | |
4421 | value -= gp; | |
4422 | goto default_reloc; | |
4423 | ||
4424 | case R_ALPHA_GPRELHIGH: | |
4425 | if (dynamic_symbol_p) | |
4426 | { | |
4427 | _bfd_error_handler | |
4428 | /* xgettext:c-format */ | |
4429 | (_("%pB: gp-relative relocation against dynamic symbol %s"), | |
4430 | input_bfd, h->root.root.root.string); | |
4431 | ret_val = FALSE; | |
4432 | } | |
4433 | BFD_ASSERT(gp != 0); | |
4434 | value -= gp; | |
4435 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); | |
4436 | goto default_reloc; | |
4437 | ||
4438 | case R_ALPHA_HINT: | |
4439 | /* A call to a dynamic symbol is definitely out of range of | |
4440 | the 16-bit displacement. Don't bother writing anything. */ | |
4441 | if (dynamic_symbol_p) | |
4442 | { | |
4443 | r = bfd_reloc_ok; | |
4444 | break; | |
4445 | } | |
4446 | /* The regular PC-relative stuff measures from the start of | |
4447 | the instruction rather than the end. */ | |
4448 | value -= 4; | |
4449 | goto default_reloc; | |
4450 | ||
4451 | case R_ALPHA_BRADDR: | |
4452 | if (dynamic_symbol_p) | |
4453 | { | |
4454 | _bfd_error_handler | |
4455 | /* xgettext:c-format */ | |
4456 | (_("%pB: pc-relative relocation against dynamic symbol %s"), | |
4457 | input_bfd, h->root.root.root.string); | |
4458 | ret_val = FALSE; | |
4459 | } | |
4460 | /* The regular PC-relative stuff measures from the start of | |
4461 | the instruction rather than the end. */ | |
4462 | value -= 4; | |
4463 | goto default_reloc; | |
4464 | ||
4465 | case R_ALPHA_BRSGP: | |
4466 | { | |
4467 | int other; | |
4468 | const char *name; | |
4469 | ||
4470 | /* The regular PC-relative stuff measures from the start of | |
4471 | the instruction rather than the end. */ | |
4472 | value -= 4; | |
4473 | ||
4474 | /* The source and destination gp must be the same. Note that | |
4475 | the source will always have an assigned gp, since we forced | |
4476 | one in check_relocs, but that the destination may not, as | |
4477 | it might not have had any relocations at all. Also take | |
4478 | care not to crash if H is an undefined symbol. */ | |
4479 | if (h != NULL && sec != NULL | |
4480 | && alpha_elf_tdata (sec->owner)->gotobj | |
4481 | && gotobj != alpha_elf_tdata (sec->owner)->gotobj) | |
4482 | { | |
4483 | _bfd_error_handler | |
4484 | /* xgettext:c-format */ | |
4485 | (_("%pB: change in gp: BRSGP %s"), | |
4486 | input_bfd, h->root.root.root.string); | |
4487 | ret_val = FALSE; | |
4488 | } | |
4489 | ||
4490 | /* The symbol should be marked either NOPV or STD_GPLOAD. */ | |
4491 | if (h != NULL) | |
4492 | other = h->root.other; | |
4493 | else | |
4494 | other = sym->st_other; | |
4495 | switch (other & STO_ALPHA_STD_GPLOAD) | |
4496 | { | |
4497 | case STO_ALPHA_NOPV: | |
4498 | break; | |
4499 | case STO_ALPHA_STD_GPLOAD: | |
4500 | value += 8; | |
4501 | break; | |
4502 | default: | |
4503 | if (h != NULL) | |
4504 | name = h->root.root.root.string; | |
4505 | else | |
4506 | { | |
4507 | name = (bfd_elf_string_from_elf_section | |
4508 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
4509 | if (name == NULL) | |
4510 | name = _("<unknown>"); | |
4511 | else if (name[0] == 0) | |
4512 | name = bfd_section_name (sec); | |
4513 | } | |
4514 | _bfd_error_handler | |
4515 | /* xgettext:c-format */ | |
4516 | (_("%pB: !samegp reloc against symbol without .prologue: %s"), | |
4517 | input_bfd, name); | |
4518 | ret_val = FALSE; | |
4519 | break; | |
4520 | } | |
4521 | ||
4522 | goto default_reloc; | |
4523 | } | |
4524 | ||
4525 | case R_ALPHA_REFLONG: | |
4526 | case R_ALPHA_REFQUAD: | |
4527 | case R_ALPHA_DTPREL64: | |
4528 | case R_ALPHA_TPREL64: | |
4529 | { | |
4530 | long dynindx, dyntype = r_type; | |
4531 | bfd_vma dynaddend; | |
4532 | ||
4533 | /* Careful here to remember RELATIVE relocations for global | |
4534 | variables for symbolic shared objects. */ | |
4535 | ||
4536 | if (dynamic_symbol_p) | |
4537 | { | |
4538 | BFD_ASSERT(h->root.dynindx != -1); | |
4539 | dynindx = h->root.dynindx; | |
4540 | dynaddend = addend; | |
4541 | addend = 0, value = 0; | |
4542 | } | |
4543 | else if (r_type == R_ALPHA_DTPREL64) | |
4544 | { | |
4545 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
4546 | value -= dtp_base; | |
4547 | goto default_reloc; | |
4548 | } | |
4549 | else if (r_type == R_ALPHA_TPREL64) | |
4550 | { | |
4551 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
4552 | if (!bfd_link_dll (info)) | |
4553 | { | |
4554 | value -= tp_base; | |
4555 | goto default_reloc; | |
4556 | } | |
4557 | dynindx = 0; | |
4558 | dynaddend = value - dtp_base; | |
4559 | } | |
4560 | else if (bfd_link_pic (info) | |
4561 | && r_symndx != STN_UNDEF | |
4562 | && (input_section->flags & SEC_ALLOC) | |
4563 | && !undef_weak_ref | |
4564 | && !(unresolved_reloc | |
4565 | && (_bfd_elf_section_offset (output_bfd, info, | |
4566 | input_section, | |
4567 | rel->r_offset) | |
4568 | == (bfd_vma) -1))) | |
4569 | { | |
4570 | if (r_type == R_ALPHA_REFLONG) | |
4571 | { | |
4572 | _bfd_error_handler | |
4573 | /* xgettext:c-format */ | |
4574 | (_("%pB: unhandled dynamic relocation against %s"), | |
4575 | input_bfd, | |
4576 | h->root.root.root.string); | |
4577 | ret_val = FALSE; | |
4578 | } | |
4579 | dynindx = 0; | |
4580 | dyntype = R_ALPHA_RELATIVE; | |
4581 | dynaddend = value; | |
4582 | } | |
4583 | else | |
4584 | goto default_reloc; | |
4585 | ||
4586 | if (input_section->flags & SEC_ALLOC) | |
4587 | elf64_alpha_emit_dynrel (output_bfd, info, input_section, | |
4588 | srel, rel->r_offset, dynindx, | |
4589 | dyntype, dynaddend); | |
4590 | } | |
4591 | goto default_reloc; | |
4592 | ||
4593 | case R_ALPHA_SREL16: | |
4594 | case R_ALPHA_SREL32: | |
4595 | case R_ALPHA_SREL64: | |
4596 | if (dynamic_symbol_p) | |
4597 | { | |
4598 | _bfd_error_handler | |
4599 | /* xgettext:c-format */ | |
4600 | (_("%pB: pc-relative relocation against dynamic symbol %s"), | |
4601 | input_bfd, h->root.root.root.string); | |
4602 | ret_val = FALSE; | |
4603 | } | |
4604 | else if (bfd_link_pic (info) | |
4605 | && undef_weak_ref) | |
4606 | { | |
4607 | _bfd_error_handler | |
4608 | /* xgettext:c-format */ | |
4609 | (_("%pB: pc-relative relocation against undefined weak symbol %s"), | |
4610 | input_bfd, h->root.root.root.string); | |
4611 | ret_val = FALSE; | |
4612 | } | |
4613 | ||
4614 | ||
4615 | /* ??? .eh_frame references to discarded sections will be smashed | |
4616 | to relocations against SHN_UNDEF. The .eh_frame format allows | |
4617 | NULL to be encoded as 0 in any format, so this works here. */ | |
4618 | if (r_symndx == STN_UNDEF | |
4619 | || (unresolved_reloc | |
4620 | && _bfd_elf_section_offset (output_bfd, info, | |
4621 | input_section, | |
4622 | rel->r_offset) == (bfd_vma) -1)) | |
4623 | howto = (elf64_alpha_howto_table | |
4624 | + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG)); | |
4625 | goto default_reloc; | |
4626 | ||
4627 | case R_ALPHA_TLSLDM: | |
4628 | /* Ignore the symbol for the relocation. The result is always | |
4629 | the current module. */ | |
4630 | dynamic_symbol_p = 0; | |
4631 | /* FALLTHRU */ | |
4632 | ||
4633 | case R_ALPHA_TLSGD: | |
4634 | if (!gotent->reloc_done) | |
4635 | { | |
4636 | gotent->reloc_done = 1; | |
4637 | ||
4638 | /* Note that the module index for the main program is 1. */ | |
4639 | bfd_put_64 (output_bfd, | |
4640 | !bfd_link_pic (info) && !dynamic_symbol_p, | |
4641 | sgot->contents + gotent->got_offset); | |
4642 | ||
4643 | /* If the symbol has been forced local, output a | |
4644 | DTPMOD64 reloc, otherwise it will be handled in | |
4645 | finish_dynamic_symbol. */ | |
4646 | if (bfd_link_pic (info) && !dynamic_symbol_p) | |
4647 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, | |
4648 | gotent->got_offset, 0, | |
4649 | R_ALPHA_DTPMOD64, 0); | |
4650 | ||
4651 | if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM) | |
4652 | value = 0; | |
4653 | else | |
4654 | { | |
4655 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
4656 | value -= dtp_base; | |
4657 | } | |
4658 | bfd_put_64 (output_bfd, value, | |
4659 | sgot->contents + gotent->got_offset + 8); | |
4660 | } | |
4661 | ||
4662 | value = (sgot->output_section->vma | |
4663 | + sgot->output_offset | |
4664 | + gotent->got_offset); | |
4665 | value -= gp; | |
4666 | goto default_reloc; | |
4667 | ||
4668 | case R_ALPHA_DTPRELHI: | |
4669 | case R_ALPHA_DTPRELLO: | |
4670 | case R_ALPHA_DTPREL16: | |
4671 | if (dynamic_symbol_p) | |
4672 | { | |
4673 | _bfd_error_handler | |
4674 | /* xgettext:c-format */ | |
4675 | (_("%pB: dtp-relative relocation against dynamic symbol %s"), | |
4676 | input_bfd, h->root.root.root.string); | |
4677 | ret_val = FALSE; | |
4678 | } | |
4679 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
4680 | value -= dtp_base; | |
4681 | if (r_type == R_ALPHA_DTPRELHI) | |
4682 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); | |
4683 | goto default_reloc; | |
4684 | ||
4685 | case R_ALPHA_TPRELHI: | |
4686 | case R_ALPHA_TPRELLO: | |
4687 | case R_ALPHA_TPREL16: | |
4688 | if (bfd_link_dll (info)) | |
4689 | { | |
4690 | _bfd_error_handler | |
4691 | /* xgettext:c-format */ | |
4692 | (_("%pB: TLS local exec code cannot be linked into shared objects"), | |
4693 | input_bfd); | |
4694 | ret_val = FALSE; | |
4695 | } | |
4696 | else if (dynamic_symbol_p) | |
4697 | { | |
4698 | _bfd_error_handler | |
4699 | /* xgettext:c-format */ | |
4700 | (_("%pB: tp-relative relocation against dynamic symbol %s"), | |
4701 | input_bfd, h->root.root.root.string); | |
4702 | ret_val = FALSE; | |
4703 | } | |
4704 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
4705 | value -= tp_base; | |
4706 | if (r_type == R_ALPHA_TPRELHI) | |
4707 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); | |
4708 | goto default_reloc; | |
4709 | ||
4710 | case R_ALPHA_GOTDTPREL: | |
4711 | case R_ALPHA_GOTTPREL: | |
4712 | BFD_ASSERT(sgot != NULL); | |
4713 | BFD_ASSERT(gp != 0); | |
4714 | BFD_ASSERT(gotent != NULL); | |
4715 | BFD_ASSERT(gotent->use_count >= 1); | |
4716 | ||
4717 | if (!gotent->reloc_done) | |
4718 | { | |
4719 | gotent->reloc_done = 1; | |
4720 | ||
4721 | if (dynamic_symbol_p) | |
4722 | value = 0; | |
4723 | else | |
4724 | { | |
4725 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
4726 | if (r_type == R_ALPHA_GOTDTPREL) | |
4727 | value -= dtp_base; | |
4728 | else if (bfd_link_executable (info)) | |
4729 | value -= tp_base; | |
4730 | else | |
4731 | { | |
4732 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, | |
4733 | gotent->got_offset, 0, | |
4734 | R_ALPHA_TPREL64, | |
4735 | value - dtp_base); | |
4736 | value = 0; | |
4737 | } | |
4738 | } | |
4739 | bfd_put_64 (output_bfd, value, | |
4740 | sgot->contents + gotent->got_offset); | |
4741 | } | |
4742 | ||
4743 | value = (sgot->output_section->vma | |
4744 | + sgot->output_offset | |
4745 | + gotent->got_offset); | |
4746 | value -= gp; | |
4747 | goto default_reloc; | |
4748 | ||
4749 | default: | |
4750 | default_reloc: | |
4751 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
4752 | contents, rel->r_offset, value, 0); | |
4753 | break; | |
4754 | } | |
4755 | ||
4756 | switch (r) | |
4757 | { | |
4758 | case bfd_reloc_ok: | |
4759 | break; | |
4760 | ||
4761 | case bfd_reloc_overflow: | |
4762 | { | |
4763 | const char *name; | |
4764 | ||
4765 | /* Don't warn if the overflow is due to pc relative reloc | |
4766 | against discarded section. Section optimization code should | |
4767 | handle it. */ | |
4768 | ||
4769 | if (r_symndx < symtab_hdr->sh_info | |
4770 | && sec != NULL && howto->pc_relative | |
4771 | && discarded_section (sec)) | |
4772 | break; | |
4773 | ||
4774 | if (h != NULL) | |
4775 | name = NULL; | |
4776 | else | |
4777 | { | |
4778 | name = (bfd_elf_string_from_elf_section | |
4779 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
4780 | if (name == NULL) | |
4781 | return FALSE; | |
4782 | if (*name == '\0') | |
4783 | name = bfd_section_name (sec); | |
4784 | } | |
4785 | (*info->callbacks->reloc_overflow) | |
4786 | (info, (h ? &h->root.root : NULL), name, howto->name, | |
4787 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
4788 | } | |
4789 | break; | |
4790 | ||
4791 | default: | |
4792 | case bfd_reloc_outofrange: | |
4793 | abort (); | |
4794 | } | |
4795 | } | |
4796 | ||
4797 | return ret_val; | |
4798 | } | |
4799 | ||
4800 | /* Finish up dynamic symbol handling. We set the contents of various | |
4801 | dynamic sections here. */ | |
4802 | ||
4803 | static bfd_boolean | |
4804 | elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, | |
4805 | struct elf_link_hash_entry *h, | |
4806 | Elf_Internal_Sym *sym) | |
4807 | { | |
4808 | struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h; | |
4809 | ||
4810 | if (h->needs_plt) | |
4811 | { | |
4812 | /* Fill in the .plt entry for this symbol. */ | |
4813 | asection *splt, *sgot, *srel; | |
4814 | Elf_Internal_Rela outrel; | |
4815 | bfd_byte *loc; | |
4816 | bfd_vma got_addr, plt_addr; | |
4817 | bfd_vma plt_index; | |
4818 | struct alpha_elf_got_entry *gotent; | |
4819 | ||
4820 | BFD_ASSERT (h->dynindx != -1); | |
4821 | ||
4822 | splt = elf_hash_table (info)->splt; | |
4823 | BFD_ASSERT (splt != NULL); | |
4824 | srel = elf_hash_table (info)->srelplt; | |
4825 | BFD_ASSERT (srel != NULL); | |
4826 | ||
4827 | for (gotent = ah->got_entries; gotent ; gotent = gotent->next) | |
4828 | if (gotent->reloc_type == R_ALPHA_LITERAL | |
4829 | && gotent->use_count > 0) | |
4830 | { | |
4831 | unsigned int insn; | |
4832 | int disp; | |
4833 | ||
4834 | sgot = alpha_elf_tdata (gotent->gotobj)->got; | |
4835 | BFD_ASSERT (sgot != NULL); | |
4836 | ||
4837 | BFD_ASSERT (gotent->got_offset != -1); | |
4838 | BFD_ASSERT (gotent->plt_offset != -1); | |
4839 | ||
4840 | got_addr = (sgot->output_section->vma | |
4841 | + sgot->output_offset | |
4842 | + gotent->got_offset); | |
4843 | plt_addr = (splt->output_section->vma | |
4844 | + splt->output_offset | |
4845 | + gotent->plt_offset); | |
4846 | ||
4847 | plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; | |
4848 | ||
4849 | /* Fill in the entry in the procedure linkage table. */ | |
4850 | if (elf64_alpha_use_secureplt) | |
4851 | { | |
4852 | disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4); | |
4853 | insn = INSN_AD (INSN_BR, 31, disp); | |
4854 | bfd_put_32 (output_bfd, insn, | |
4855 | splt->contents + gotent->plt_offset); | |
4856 | ||
4857 | plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE) | |
4858 | / NEW_PLT_ENTRY_SIZE); | |
4859 | } | |
4860 | else | |
4861 | { | |
4862 | disp = -(gotent->plt_offset + 4); | |
4863 | insn = INSN_AD (INSN_BR, 28, disp); | |
4864 | bfd_put_32 (output_bfd, insn, | |
4865 | splt->contents + gotent->plt_offset); | |
4866 | bfd_put_32 (output_bfd, INSN_UNOP, | |
4867 | splt->contents + gotent->plt_offset + 4); | |
4868 | bfd_put_32 (output_bfd, INSN_UNOP, | |
4869 | splt->contents + gotent->plt_offset + 8); | |
4870 | ||
4871 | plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE) | |
4872 | / OLD_PLT_ENTRY_SIZE); | |
4873 | } | |
4874 | ||
4875 | /* Fill in the entry in the .rela.plt section. */ | |
4876 | outrel.r_offset = got_addr; | |
4877 | outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT); | |
4878 | outrel.r_addend = 0; | |
4879 | ||
4880 | loc = srel->contents + plt_index * sizeof (Elf64_External_Rela); | |
4881 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
4882 | ||
4883 | /* Fill in the entry in the .got. */ | |
4884 | bfd_put_64 (output_bfd, plt_addr, | |
4885 | sgot->contents + gotent->got_offset); | |
4886 | } | |
4887 | } | |
4888 | else if (alpha_elf_dynamic_symbol_p (h, info)) | |
4889 | { | |
4890 | /* Fill in the dynamic relocations for this symbol's .got entries. */ | |
4891 | asection *srel; | |
4892 | struct alpha_elf_got_entry *gotent; | |
4893 | ||
4894 | srel = elf_hash_table (info)->srelgot; | |
4895 | BFD_ASSERT (srel != NULL); | |
4896 | ||
4897 | for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; | |
4898 | gotent != NULL; | |
4899 | gotent = gotent->next) | |
4900 | { | |
4901 | asection *sgot; | |
4902 | long r_type; | |
4903 | ||
4904 | if (gotent->use_count == 0) | |
4905 | continue; | |
4906 | ||
4907 | sgot = alpha_elf_tdata (gotent->gotobj)->got; | |
4908 | ||
4909 | r_type = gotent->reloc_type; | |
4910 | switch (r_type) | |
4911 | { | |
4912 | case R_ALPHA_LITERAL: | |
4913 | r_type = R_ALPHA_GLOB_DAT; | |
4914 | break; | |
4915 | case R_ALPHA_TLSGD: | |
4916 | r_type = R_ALPHA_DTPMOD64; | |
4917 | break; | |
4918 | case R_ALPHA_GOTDTPREL: | |
4919 | r_type = R_ALPHA_DTPREL64; | |
4920 | break; | |
4921 | case R_ALPHA_GOTTPREL: | |
4922 | r_type = R_ALPHA_TPREL64; | |
4923 | break; | |
4924 | case R_ALPHA_TLSLDM: | |
4925 | default: | |
4926 | abort (); | |
4927 | } | |
4928 | ||
4929 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, | |
4930 | gotent->got_offset, h->dynindx, | |
4931 | r_type, gotent->addend); | |
4932 | ||
4933 | if (gotent->reloc_type == R_ALPHA_TLSGD) | |
4934 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, | |
4935 | gotent->got_offset + 8, h->dynindx, | |
4936 | R_ALPHA_DTPREL64, gotent->addend); | |
4937 | } | |
4938 | } | |
4939 | ||
4940 | /* Mark some specially defined symbols as absolute. */ | |
4941 | if (h == elf_hash_table (info)->hdynamic | |
4942 | || h == elf_hash_table (info)->hgot | |
4943 | || h == elf_hash_table (info)->hplt) | |
4944 | sym->st_shndx = SHN_ABS; | |
4945 | ||
4946 | return TRUE; | |
4947 | } | |
4948 | ||
4949 | /* Finish up the dynamic sections. */ | |
4950 | ||
4951 | static bfd_boolean | |
4952 | elf64_alpha_finish_dynamic_sections (bfd *output_bfd, | |
4953 | struct bfd_link_info *info) | |
4954 | { | |
4955 | bfd *dynobj; | |
4956 | asection *sdyn; | |
4957 | ||
4958 | dynobj = elf_hash_table (info)->dynobj; | |
4959 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
4960 | ||
4961 | if (elf_hash_table (info)->dynamic_sections_created) | |
4962 | { | |
4963 | asection *splt, *sgotplt, *srelaplt; | |
4964 | Elf64_External_Dyn *dyncon, *dynconend; | |
4965 | bfd_vma plt_vma, gotplt_vma; | |
4966 | ||
4967 | splt = elf_hash_table (info)->splt; | |
4968 | srelaplt = elf_hash_table (info)->srelplt; | |
4969 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
4970 | ||
4971 | plt_vma = splt->output_section->vma + splt->output_offset; | |
4972 | ||
4973 | gotplt_vma = 0; | |
4974 | if (elf64_alpha_use_secureplt) | |
4975 | { | |
4976 | sgotplt = elf_hash_table (info)->sgotplt; | |
4977 | BFD_ASSERT (sgotplt != NULL); | |
4978 | if (sgotplt->size > 0) | |
4979 | gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset; | |
4980 | } | |
4981 | ||
4982 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
4983 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); | |
4984 | for (; dyncon < dynconend; dyncon++) | |
4985 | { | |
4986 | Elf_Internal_Dyn dyn; | |
4987 | ||
4988 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
4989 | ||
4990 | switch (dyn.d_tag) | |
4991 | { | |
4992 | case DT_PLTGOT: | |
4993 | dyn.d_un.d_ptr | |
4994 | = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma; | |
4995 | break; | |
4996 | case DT_PLTRELSZ: | |
4997 | dyn.d_un.d_val = srelaplt ? srelaplt->size : 0; | |
4998 | break; | |
4999 | case DT_JMPREL: | |
5000 | dyn.d_un.d_ptr = srelaplt ? (srelaplt->output_section->vma | |
5001 | + srelaplt->output_offset) : 0; | |
5002 | break; | |
5003 | } | |
5004 | ||
5005 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
5006 | } | |
5007 | ||
5008 | /* Initialize the plt header. */ | |
5009 | if (splt->size > 0) | |
5010 | { | |
5011 | unsigned int insn; | |
5012 | int ofs; | |
5013 | ||
5014 | if (elf64_alpha_use_secureplt) | |
5015 | { | |
5016 | ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE); | |
5017 | ||
5018 | insn = INSN_ABC (INSN_SUBQ, 27, 28, 25); | |
5019 | bfd_put_32 (output_bfd, insn, splt->contents); | |
5020 | ||
5021 | insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16); | |
5022 | bfd_put_32 (output_bfd, insn, splt->contents + 4); | |
5023 | ||
5024 | insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25); | |
5025 | bfd_put_32 (output_bfd, insn, splt->contents + 8); | |
5026 | ||
5027 | insn = INSN_ABO (INSN_LDA, 28, 28, ofs); | |
5028 | bfd_put_32 (output_bfd, insn, splt->contents + 12); | |
5029 | ||
5030 | insn = INSN_ABO (INSN_LDQ, 27, 28, 0); | |
5031 | bfd_put_32 (output_bfd, insn, splt->contents + 16); | |
5032 | ||
5033 | insn = INSN_ABC (INSN_ADDQ, 25, 25, 25); | |
5034 | bfd_put_32 (output_bfd, insn, splt->contents + 20); | |
5035 | ||
5036 | insn = INSN_ABO (INSN_LDQ, 28, 28, 8); | |
5037 | bfd_put_32 (output_bfd, insn, splt->contents + 24); | |
5038 | ||
5039 | insn = INSN_AB (INSN_JMP, 31, 27); | |
5040 | bfd_put_32 (output_bfd, insn, splt->contents + 28); | |
5041 | ||
5042 | insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE); | |
5043 | bfd_put_32 (output_bfd, insn, splt->contents + 32); | |
5044 | } | |
5045 | else | |
5046 | { | |
5047 | insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */ | |
5048 | bfd_put_32 (output_bfd, insn, splt->contents); | |
5049 | ||
5050 | insn = INSN_ABO (INSN_LDQ, 27, 27, 12); | |
5051 | bfd_put_32 (output_bfd, insn, splt->contents + 4); | |
5052 | ||
5053 | insn = INSN_UNOP; | |
5054 | bfd_put_32 (output_bfd, insn, splt->contents + 8); | |
5055 | ||
5056 | insn = INSN_AB (INSN_JMP, 27, 27); | |
5057 | bfd_put_32 (output_bfd, insn, splt->contents + 12); | |
5058 | ||
5059 | /* The next two words will be filled in by ld.so. */ | |
5060 | bfd_put_64 (output_bfd, 0, splt->contents + 16); | |
5061 | bfd_put_64 (output_bfd, 0, splt->contents + 24); | |
5062 | } | |
5063 | ||
5064 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0; | |
5065 | } | |
5066 | } | |
5067 | ||
5068 | return TRUE; | |
5069 | } | |
5070 | ||
5071 | /* We need to use a special link routine to handle the .mdebug section. | |
5072 | We need to merge all instances of these sections together, not write | |
5073 | them all out sequentially. */ | |
5074 | ||
5075 | static bfd_boolean | |
5076 | elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info) | |
5077 | { | |
5078 | asection *o; | |
5079 | struct bfd_link_order *p; | |
5080 | asection *mdebug_sec; | |
5081 | struct ecoff_debug_info debug; | |
5082 | const struct ecoff_debug_swap *swap | |
5083 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
5084 | HDRR *symhdr = &debug.symbolic_header; | |
5085 | void * mdebug_handle = NULL; | |
5086 | struct alpha_elf_link_hash_table * htab; | |
5087 | ||
5088 | htab = alpha_elf_hash_table (info); | |
5089 | if (htab == NULL) | |
5090 | return FALSE; | |
5091 | ||
5092 | /* Go through the sections and collect the mdebug information. */ | |
5093 | mdebug_sec = NULL; | |
5094 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
5095 | { | |
5096 | if (strcmp (o->name, ".mdebug") == 0) | |
5097 | { | |
5098 | struct extsym_info einfo; | |
5099 | ||
5100 | /* We have found the .mdebug section in the output file. | |
5101 | Look through all the link_orders comprising it and merge | |
5102 | the information together. */ | |
5103 | symhdr->magic = swap->sym_magic; | |
5104 | /* FIXME: What should the version stamp be? */ | |
5105 | symhdr->vstamp = 0; | |
5106 | symhdr->ilineMax = 0; | |
5107 | symhdr->cbLine = 0; | |
5108 | symhdr->idnMax = 0; | |
5109 | symhdr->ipdMax = 0; | |
5110 | symhdr->isymMax = 0; | |
5111 | symhdr->ioptMax = 0; | |
5112 | symhdr->iauxMax = 0; | |
5113 | symhdr->issMax = 0; | |
5114 | symhdr->issExtMax = 0; | |
5115 | symhdr->ifdMax = 0; | |
5116 | symhdr->crfd = 0; | |
5117 | symhdr->iextMax = 0; | |
5118 | ||
5119 | /* We accumulate the debugging information itself in the | |
5120 | debug_info structure. */ | |
5121 | debug.line = NULL; | |
5122 | debug.external_dnr = NULL; | |
5123 | debug.external_pdr = NULL; | |
5124 | debug.external_sym = NULL; | |
5125 | debug.external_opt = NULL; | |
5126 | debug.external_aux = NULL; | |
5127 | debug.ss = NULL; | |
5128 | debug.ssext = debug.ssext_end = NULL; | |
5129 | debug.external_fdr = NULL; | |
5130 | debug.external_rfd = NULL; | |
5131 | debug.external_ext = debug.external_ext_end = NULL; | |
5132 | ||
5133 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); | |
5134 | if (mdebug_handle == NULL) | |
5135 | return FALSE; | |
5136 | ||
5137 | if (1) | |
5138 | { | |
5139 | asection *s; | |
5140 | EXTR esym; | |
5141 | bfd_vma last = 0; | |
5142 | unsigned int i; | |
5143 | static const char * const name[] = | |
5144 | { | |
5145 | ".text", ".init", ".fini", ".data", | |
5146 | ".rodata", ".sdata", ".sbss", ".bss" | |
5147 | }; | |
5148 | static const int sc[] = { scText, scInit, scFini, scData, | |
5149 | scRData, scSData, scSBss, scBss }; | |
5150 | ||
5151 | esym.jmptbl = 0; | |
5152 | esym.cobol_main = 0; | |
5153 | esym.weakext = 0; | |
5154 | esym.reserved = 0; | |
5155 | esym.ifd = ifdNil; | |
5156 | esym.asym.iss = issNil; | |
5157 | esym.asym.st = stLocal; | |
5158 | esym.asym.reserved = 0; | |
5159 | esym.asym.index = indexNil; | |
5160 | for (i = 0; i < 8; i++) | |
5161 | { | |
5162 | esym.asym.sc = sc[i]; | |
5163 | s = bfd_get_section_by_name (abfd, name[i]); | |
5164 | if (s != NULL) | |
5165 | { | |
5166 | esym.asym.value = s->vma; | |
5167 | last = s->vma + s->size; | |
5168 | } | |
5169 | else | |
5170 | esym.asym.value = last; | |
5171 | ||
5172 | if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, | |
5173 | name[i], &esym)) | |
5174 | return FALSE; | |
5175 | } | |
5176 | } | |
5177 | ||
5178 | for (p = o->map_head.link_order; | |
5179 | p != (struct bfd_link_order *) NULL; | |
5180 | p = p->next) | |
5181 | { | |
5182 | asection *input_section; | |
5183 | bfd *input_bfd; | |
5184 | const struct ecoff_debug_swap *input_swap; | |
5185 | struct ecoff_debug_info input_debug; | |
5186 | char *eraw_src; | |
5187 | char *eraw_end; | |
5188 | ||
5189 | if (p->type != bfd_indirect_link_order) | |
5190 | { | |
5191 | if (p->type == bfd_data_link_order) | |
5192 | continue; | |
5193 | abort (); | |
5194 | } | |
5195 | ||
5196 | input_section = p->u.indirect.section; | |
5197 | input_bfd = input_section->owner; | |
5198 | ||
5199 | if (! is_alpha_elf (input_bfd)) | |
5200 | /* I don't know what a non ALPHA ELF bfd would be | |
5201 | doing with a .mdebug section, but I don't really | |
5202 | want to deal with it. */ | |
5203 | continue; | |
5204 | ||
5205 | input_swap = (get_elf_backend_data (input_bfd) | |
5206 | ->elf_backend_ecoff_debug_swap); | |
5207 | ||
5208 | BFD_ASSERT (p->size == input_section->size); | |
5209 | ||
5210 | /* The ECOFF linking code expects that we have already | |
5211 | read in the debugging information and set up an | |
5212 | ecoff_debug_info structure, so we do that now. */ | |
5213 | if (!elf64_alpha_read_ecoff_info (input_bfd, input_section, | |
5214 | &input_debug)) | |
5215 | return FALSE; | |
5216 | ||
5217 | if (! (bfd_ecoff_debug_accumulate | |
5218 | (mdebug_handle, abfd, &debug, swap, input_bfd, | |
5219 | &input_debug, input_swap, info))) | |
5220 | return FALSE; | |
5221 | ||
5222 | /* Loop through the external symbols. For each one with | |
5223 | interesting information, try to find the symbol in | |
5224 | the linker global hash table and save the information | |
5225 | for the output external symbols. */ | |
5226 | eraw_src = (char *) input_debug.external_ext; | |
5227 | eraw_end = (eraw_src | |
5228 | + (input_debug.symbolic_header.iextMax | |
5229 | * input_swap->external_ext_size)); | |
5230 | for (; | |
5231 | eraw_src < eraw_end; | |
5232 | eraw_src += input_swap->external_ext_size) | |
5233 | { | |
5234 | EXTR ext; | |
5235 | const char *name; | |
5236 | struct alpha_elf_link_hash_entry *h; | |
5237 | ||
5238 | (*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext); | |
5239 | if (ext.asym.sc == scNil | |
5240 | || ext.asym.sc == scUndefined | |
5241 | || ext.asym.sc == scSUndefined) | |
5242 | continue; | |
5243 | ||
5244 | name = input_debug.ssext + ext.asym.iss; | |
5245 | h = alpha_elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); | |
5246 | if (h == NULL || h->esym.ifd != -2) | |
5247 | continue; | |
5248 | ||
5249 | if (ext.ifd != -1) | |
5250 | { | |
5251 | BFD_ASSERT (ext.ifd | |
5252 | < input_debug.symbolic_header.ifdMax); | |
5253 | ext.ifd = input_debug.ifdmap[ext.ifd]; | |
5254 | } | |
5255 | ||
5256 | h->esym = ext; | |
5257 | } | |
5258 | ||
5259 | /* Free up the information we just read. */ | |
5260 | free (input_debug.line); | |
5261 | free (input_debug.external_dnr); | |
5262 | free (input_debug.external_pdr); | |
5263 | free (input_debug.external_sym); | |
5264 | free (input_debug.external_opt); | |
5265 | free (input_debug.external_aux); | |
5266 | free (input_debug.ss); | |
5267 | free (input_debug.ssext); | |
5268 | free (input_debug.external_fdr); | |
5269 | free (input_debug.external_rfd); | |
5270 | free (input_debug.external_ext); | |
5271 | ||
5272 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
5273 | elf_link_input_bfd ignores this section. */ | |
5274 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
5275 | } | |
5276 | ||
5277 | /* Build the external symbol information. */ | |
5278 | einfo.abfd = abfd; | |
5279 | einfo.info = info; | |
5280 | einfo.debug = &debug; | |
5281 | einfo.swap = swap; | |
5282 | einfo.failed = FALSE; | |
5283 | elf_link_hash_traverse (elf_hash_table (info), | |
5284 | elf64_alpha_output_extsym, | |
5285 | &einfo); | |
5286 | if (einfo.failed) | |
5287 | return FALSE; | |
5288 | ||
5289 | /* Set the size of the .mdebug section. */ | |
5290 | o->size = bfd_ecoff_debug_size (abfd, &debug, swap); | |
5291 | ||
5292 | /* Skip this section later on (I don't think this currently | |
5293 | matters, but someday it might). */ | |
5294 | o->map_head.link_order = (struct bfd_link_order *) NULL; | |
5295 | ||
5296 | mdebug_sec = o; | |
5297 | } | |
5298 | } | |
5299 | ||
5300 | /* Invoke the regular ELF backend linker to do all the work. */ | |
5301 | if (! bfd_elf_final_link (abfd, info)) | |
5302 | return FALSE; | |
5303 | ||
5304 | /* Now write out the computed sections. */ | |
5305 | ||
5306 | /* The .got subsections... */ | |
5307 | { | |
5308 | bfd *i, *dynobj = elf_hash_table(info)->dynobj; | |
5309 | for (i = htab->got_list; | |
5310 | i != NULL; | |
5311 | i = alpha_elf_tdata(i)->got_link_next) | |
5312 | { | |
5313 | asection *sgot; | |
5314 | ||
5315 | /* elf_bfd_final_link already did everything in dynobj. */ | |
5316 | if (i == dynobj) | |
5317 | continue; | |
5318 | ||
5319 | sgot = alpha_elf_tdata(i)->got; | |
5320 | if (! bfd_set_section_contents (abfd, sgot->output_section, | |
5321 | sgot->contents, | |
5322 | (file_ptr) sgot->output_offset, | |
5323 | sgot->size)) | |
5324 | return FALSE; | |
5325 | } | |
5326 | } | |
5327 | ||
5328 | if (mdebug_sec != (asection *) NULL) | |
5329 | { | |
5330 | BFD_ASSERT (abfd->output_has_begun); | |
5331 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, | |
5332 | swap, info, | |
5333 | mdebug_sec->filepos)) | |
5334 | return FALSE; | |
5335 | ||
5336 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); | |
5337 | } | |
5338 | ||
5339 | return TRUE; | |
5340 | } | |
5341 | ||
5342 | static enum elf_reloc_type_class | |
5343 | elf64_alpha_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
5344 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
5345 | const Elf_Internal_Rela *rela) | |
5346 | { | |
5347 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
5348 | { | |
5349 | case R_ALPHA_RELATIVE: | |
5350 | return reloc_class_relative; | |
5351 | case R_ALPHA_JMP_SLOT: | |
5352 | return reloc_class_plt; | |
5353 | case R_ALPHA_COPY: | |
5354 | return reloc_class_copy; | |
5355 | default: | |
5356 | return reloc_class_normal; | |
5357 | } | |
5358 | } | |
5359 | \f | |
5360 | static const struct bfd_elf_special_section elf64_alpha_special_sections[] = | |
5361 | { | |
5362 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, | |
5363 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, | |
5364 | { NULL, 0, 0, 0, 0 } | |
5365 | }; | |
5366 | ||
5367 | /* ECOFF swapping routines. These are used when dealing with the | |
5368 | .mdebug section, which is in the ECOFF debugging format. Copied | |
5369 | from elf32-mips.c. */ | |
5370 | static const struct ecoff_debug_swap | |
5371 | elf64_alpha_ecoff_debug_swap = | |
5372 | { | |
5373 | /* Symbol table magic number. */ | |
5374 | magicSym2, | |
5375 | /* Alignment of debugging information. E.g., 4. */ | |
5376 | 8, | |
5377 | /* Sizes of external symbolic information. */ | |
5378 | sizeof (struct hdr_ext), | |
5379 | sizeof (struct dnr_ext), | |
5380 | sizeof (struct pdr_ext), | |
5381 | sizeof (struct sym_ext), | |
5382 | sizeof (struct opt_ext), | |
5383 | sizeof (struct fdr_ext), | |
5384 | sizeof (struct rfd_ext), | |
5385 | sizeof (struct ext_ext), | |
5386 | /* Functions to swap in external symbolic data. */ | |
5387 | ecoff_swap_hdr_in, | |
5388 | ecoff_swap_dnr_in, | |
5389 | ecoff_swap_pdr_in, | |
5390 | ecoff_swap_sym_in, | |
5391 | ecoff_swap_opt_in, | |
5392 | ecoff_swap_fdr_in, | |
5393 | ecoff_swap_rfd_in, | |
5394 | ecoff_swap_ext_in, | |
5395 | _bfd_ecoff_swap_tir_in, | |
5396 | _bfd_ecoff_swap_rndx_in, | |
5397 | /* Functions to swap out external symbolic data. */ | |
5398 | ecoff_swap_hdr_out, | |
5399 | ecoff_swap_dnr_out, | |
5400 | ecoff_swap_pdr_out, | |
5401 | ecoff_swap_sym_out, | |
5402 | ecoff_swap_opt_out, | |
5403 | ecoff_swap_fdr_out, | |
5404 | ecoff_swap_rfd_out, | |
5405 | ecoff_swap_ext_out, | |
5406 | _bfd_ecoff_swap_tir_out, | |
5407 | _bfd_ecoff_swap_rndx_out, | |
5408 | /* Function to read in symbolic data. */ | |
5409 | elf64_alpha_read_ecoff_info | |
5410 | }; | |
5411 | \f | |
5412 | /* Use a non-standard hash bucket size of 8. */ | |
5413 | ||
5414 | static const struct elf_size_info alpha_elf_size_info = | |
5415 | { | |
5416 | sizeof (Elf64_External_Ehdr), | |
5417 | sizeof (Elf64_External_Phdr), | |
5418 | sizeof (Elf64_External_Shdr), | |
5419 | sizeof (Elf64_External_Rel), | |
5420 | sizeof (Elf64_External_Rela), | |
5421 | sizeof (Elf64_External_Sym), | |
5422 | sizeof (Elf64_External_Dyn), | |
5423 | sizeof (Elf_External_Note), | |
5424 | 8, | |
5425 | 1, | |
5426 | 64, 3, | |
5427 | ELFCLASS64, EV_CURRENT, | |
5428 | bfd_elf64_write_out_phdrs, | |
5429 | bfd_elf64_write_shdrs_and_ehdr, | |
5430 | bfd_elf64_checksum_contents, | |
5431 | bfd_elf64_write_relocs, | |
5432 | bfd_elf64_swap_symbol_in, | |
5433 | bfd_elf64_swap_symbol_out, | |
5434 | bfd_elf64_slurp_reloc_table, | |
5435 | bfd_elf64_slurp_symbol_table, | |
5436 | bfd_elf64_swap_dyn_in, | |
5437 | bfd_elf64_swap_dyn_out, | |
5438 | bfd_elf64_swap_reloc_in, | |
5439 | bfd_elf64_swap_reloc_out, | |
5440 | bfd_elf64_swap_reloca_in, | |
5441 | bfd_elf64_swap_reloca_out | |
5442 | }; | |
5443 | ||
5444 | #define TARGET_LITTLE_SYM alpha_elf64_vec | |
5445 | #define TARGET_LITTLE_NAME "elf64-alpha" | |
5446 | #define ELF_ARCH bfd_arch_alpha | |
5447 | #define ELF_TARGET_ID ALPHA_ELF_DATA | |
5448 | #define ELF_MACHINE_CODE EM_ALPHA | |
5449 | #define ELF_MAXPAGESIZE 0x10000 | |
5450 | #define ELF_COMMONPAGESIZE 0x2000 | |
5451 | ||
5452 | #define bfd_elf64_bfd_link_hash_table_create \ | |
5453 | elf64_alpha_bfd_link_hash_table_create | |
5454 | ||
5455 | #define bfd_elf64_bfd_reloc_type_lookup \ | |
5456 | elf64_alpha_bfd_reloc_type_lookup | |
5457 | #define bfd_elf64_bfd_reloc_name_lookup \ | |
5458 | elf64_alpha_bfd_reloc_name_lookup | |
5459 | #define elf_info_to_howto \ | |
5460 | elf64_alpha_info_to_howto | |
5461 | ||
5462 | #define bfd_elf64_mkobject \ | |
5463 | elf64_alpha_mkobject | |
5464 | #define elf_backend_object_p \ | |
5465 | elf64_alpha_object_p | |
5466 | ||
5467 | #define elf_backend_section_from_shdr \ | |
5468 | elf64_alpha_section_from_shdr | |
5469 | #define elf_backend_section_flags \ | |
5470 | elf64_alpha_section_flags | |
5471 | #define elf_backend_fake_sections \ | |
5472 | elf64_alpha_fake_sections | |
5473 | ||
5474 | #define bfd_elf64_bfd_is_local_label_name \ | |
5475 | elf64_alpha_is_local_label_name | |
5476 | #define bfd_elf64_find_nearest_line \ | |
5477 | elf64_alpha_find_nearest_line | |
5478 | #define bfd_elf64_bfd_relax_section \ | |
5479 | elf64_alpha_relax_section | |
5480 | ||
5481 | #define elf_backend_add_symbol_hook \ | |
5482 | elf64_alpha_add_symbol_hook | |
5483 | #define elf_backend_relocs_compatible \ | |
5484 | _bfd_elf_relocs_compatible | |
5485 | #define elf_backend_sort_relocs_p \ | |
5486 | elf64_alpha_sort_relocs_p | |
5487 | #define elf_backend_check_relocs \ | |
5488 | elf64_alpha_check_relocs | |
5489 | #define elf_backend_create_dynamic_sections \ | |
5490 | elf64_alpha_create_dynamic_sections | |
5491 | #define elf_backend_adjust_dynamic_symbol \ | |
5492 | elf64_alpha_adjust_dynamic_symbol | |
5493 | #define elf_backend_merge_symbol_attribute \ | |
5494 | elf64_alpha_merge_symbol_attribute | |
5495 | #define elf_backend_copy_indirect_symbol \ | |
5496 | elf64_alpha_copy_indirect_symbol | |
5497 | #define elf_backend_always_size_sections \ | |
5498 | elf64_alpha_always_size_sections | |
5499 | #define elf_backend_size_dynamic_sections \ | |
5500 | elf64_alpha_size_dynamic_sections | |
5501 | #define elf_backend_omit_section_dynsym \ | |
5502 | _bfd_elf_omit_section_dynsym_all | |
5503 | #define elf_backend_relocate_section \ | |
5504 | elf64_alpha_relocate_section | |
5505 | #define elf_backend_finish_dynamic_symbol \ | |
5506 | elf64_alpha_finish_dynamic_symbol | |
5507 | #define elf_backend_finish_dynamic_sections \ | |
5508 | elf64_alpha_finish_dynamic_sections | |
5509 | #define bfd_elf64_bfd_final_link \ | |
5510 | elf64_alpha_final_link | |
5511 | #define elf_backend_reloc_type_class \ | |
5512 | elf64_alpha_reloc_type_class | |
5513 | ||
5514 | #define elf_backend_can_gc_sections 1 | |
5515 | #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook | |
5516 | ||
5517 | #define elf_backend_ecoff_debug_swap \ | |
5518 | &elf64_alpha_ecoff_debug_swap | |
5519 | ||
5520 | #define elf_backend_size_info \ | |
5521 | alpha_elf_size_info | |
5522 | ||
5523 | #define elf_backend_special_sections \ | |
5524 | elf64_alpha_special_sections | |
5525 | ||
5526 | /* A few constants that determine how the .plt section is set up. */ | |
5527 | #define elf_backend_want_got_plt 0 | |
5528 | #define elf_backend_plt_readonly 0 | |
5529 | #define elf_backend_want_plt_sym 1 | |
5530 | #define elf_backend_got_header_size 0 | |
5531 | #define elf_backend_dtrel_excludes_plt 1 | |
5532 | ||
5533 | #include "elf64-target.h" | |
5534 | \f | |
5535 | /* FreeBSD support. */ | |
5536 | ||
5537 | #undef TARGET_LITTLE_SYM | |
5538 | #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec | |
5539 | #undef TARGET_LITTLE_NAME | |
5540 | #define TARGET_LITTLE_NAME "elf64-alpha-freebsd" | |
5541 | #undef ELF_OSABI | |
5542 | #define ELF_OSABI ELFOSABI_FREEBSD | |
5543 | ||
5544 | /* The kernel recognizes executables as valid only if they carry a | |
5545 | "FreeBSD" label in the ELF header. So we put this label on all | |
5546 | executables and (for simplicity) also all other object files. */ | |
5547 | ||
5548 | static bfd_boolean | |
5549 | elf64_alpha_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info) | |
5550 | { | |
5551 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ | |
5552 | ||
5553 | if (!_bfd_elf_init_file_header (abfd, info)) | |
5554 | return FALSE; | |
5555 | ||
5556 | i_ehdrp = elf_elfheader (abfd); | |
5557 | ||
5558 | /* Put an ABI label supported by FreeBSD >= 4.1. */ | |
5559 | i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; | |
5560 | #ifdef OLD_FREEBSD_ABI_LABEL | |
5561 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
5562 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
5563 | #endif | |
5564 | return TRUE; | |
5565 | } | |
5566 | ||
5567 | #undef elf_backend_init_file_header | |
5568 | #define elf_backend_init_file_header \ | |
5569 | elf64_alpha_fbsd_init_file_header | |
5570 | ||
5571 | #undef elf64_bed | |
5572 | #define elf64_bed elf64_alpha_fbsd_bed | |
5573 | ||
5574 | #include "elf64-target.h" |