/src/binutils-gdb/bfd/elf64-alpha.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* Alpha specific support for 64-bit ELF |
2 | | Copyright (C) 1996-2023 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 | | |
53 | | /* Instruction data for plt generation and relaxation. */ |
54 | | |
55 | 0 | #define OP_LDA 0x08U |
56 | 0 | #define OP_LDAH 0x09U |
57 | 0 | #define OP_LDQ 0x29U |
58 | 0 | #define OP_BR 0x30U |
59 | 0 | #define OP_BSR 0x34U |
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 | 0 | #define INSN_ADDQ 0x40000400 |
67 | | #define INSN_RDUNIQ 0x0000009e |
68 | | #define INSN_SUBQ 0x40000520 |
69 | | #define INSN_S4SUBQ 0x40000560 |
70 | 0 | #define INSN_UNOP 0x2ffe0000 |
71 | | |
72 | 0 | #define INSN_JSR 0x68004000 |
73 | | #define INSN_JMP 0x68000000 |
74 | 0 | #define INSN_JSR_MASK 0xfc00c000 |
75 | | |
76 | 0 | #define INSN_A(I,A) (I | ((unsigned) A << 21)) |
77 | 0 | #define INSN_AB(I,A,B) (INSN_A (I, A) | (B << 16)) |
78 | 0 | #define INSN_ABC(I,A,B,C) (INSN_A (I, A) | (B << 16) | C) |
79 | 0 | #define INSN_ABO(I,A,B,O) (INSN_A (I, A) | (B << 16) | ((O) & 0xffff)) |
80 | 0 | #define INSN_AD(I,A,D) (INSN_A (I, A) | (((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 | | bool elf64_alpha_use_secureplt = true; |
88 | | #else |
89 | | bool elf64_alpha_use_secureplt = false; |
90 | | #endif |
91 | | |
92 | 0 | #define OLD_PLT_HEADER_SIZE 32 |
93 | 0 | #define OLD_PLT_ENTRY_SIZE 12 |
94 | 0 | #define NEW_PLT_HEADER_SIZE 36 |
95 | 0 | #define NEW_PLT_ENTRY_SIZE 4 |
96 | | |
97 | | #define PLT_HEADER_SIZE \ |
98 | 0 | (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE) |
99 | | #define PLT_ENTRY_SIZE \ |
100 | 0 | (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE) |
101 | | |
102 | 0 | #define MAX_GOT_SIZE (64*1024) |
103 | | |
104 | 0 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" |
105 | | |
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 | | /* Which section this relocation is against? */ |
148 | | asection *sec; |
149 | | |
150 | | /* How many did we find? */ |
151 | | unsigned long count; |
152 | | |
153 | | /* What kind of relocation? */ |
154 | | unsigned int rtype; |
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 | 0 | #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 | 0 | #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38 |
176 | 0 | #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 | 0 | ((struct alpha_elf_link_hash_entry *) \ |
205 | 0 | elf_link_hash_lookup (&(table)->root, (string), (create), \ |
206 | 0 | (copy), (follow))) |
207 | | |
208 | | /* Traverse a Alpha ELF linker hash table. */ |
209 | | |
210 | | #define alpha_elf_link_hash_traverse(table, func, info) \ |
211 | 0 | (elf_link_hash_traverse \ |
212 | 0 | (&(table)->root, \ |
213 | 0 | (bool (*) (struct elf_link_hash_entry *, void *)) (func), \ |
214 | 0 | (info))) |
215 | | |
216 | | /* Get the Alpha ELF linker hash table from a link_info structure. */ |
217 | | |
218 | | #define alpha_elf_hash_table(p) \ |
219 | 0 | ((is_elf_hash_table ((p)->hash) \ |
220 | 0 | && elf_hash_table_id (elf_hash_table (p)) == ALPHA_ELF_DATA) \ |
221 | 0 | ? (struct alpha_elf_link_hash_table *) (p)->hash : NULL) |
222 | | |
223 | | /* Get the object's symbols as our own entry type. */ |
224 | | |
225 | | #define alpha_elf_sym_hashes(abfd) \ |
226 | 0 | ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd)) |
227 | | |
228 | | /* Should we do dynamic things to this symbol? This differs from the |
229 | | generic version in that we never need to consider function pointer |
230 | | equality wrt PLT entries -- we don't create a PLT entry if a symbol's |
231 | | address is ever taken. */ |
232 | | |
233 | | static inline bool |
234 | | alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
235 | | struct bfd_link_info *info) |
236 | 0 | { |
237 | 0 | return _bfd_elf_dynamic_symbol_p (h, info, 0); |
238 | 0 | } |
239 | | |
240 | | /* Create an entry in a Alpha ELF linker hash table. */ |
241 | | |
242 | | static struct bfd_hash_entry * |
243 | | elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry, |
244 | | struct bfd_hash_table *table, |
245 | | const char *string) |
246 | 0 | { |
247 | 0 | struct alpha_elf_link_hash_entry *ret = |
248 | 0 | (struct alpha_elf_link_hash_entry *) entry; |
249 | | |
250 | | /* Allocate the structure if it has not already been allocated by a |
251 | | subclass. */ |
252 | 0 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) |
253 | 0 | ret = ((struct alpha_elf_link_hash_entry *) |
254 | 0 | bfd_hash_allocate (table, |
255 | 0 | sizeof (struct alpha_elf_link_hash_entry))); |
256 | 0 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) |
257 | 0 | return (struct bfd_hash_entry *) ret; |
258 | | |
259 | | /* Call the allocation method of the superclass. */ |
260 | 0 | ret = ((struct alpha_elf_link_hash_entry *) |
261 | 0 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
262 | 0 | table, string)); |
263 | 0 | if (ret != (struct alpha_elf_link_hash_entry *) NULL) |
264 | 0 | { |
265 | | /* Set local fields. */ |
266 | 0 | memset (&ret->esym, 0, sizeof (EXTR)); |
267 | | /* We use -2 as a marker to indicate that the information has |
268 | | not been set. -1 means there is no associated ifd. */ |
269 | 0 | ret->esym.ifd = -2; |
270 | 0 | ret->flags = 0; |
271 | 0 | ret->got_entries = NULL; |
272 | 0 | ret->reloc_entries = NULL; |
273 | 0 | } |
274 | |
|
275 | 0 | return (struct bfd_hash_entry *) ret; |
276 | 0 | } |
277 | | |
278 | | /* Create a Alpha ELF linker hash table. */ |
279 | | |
280 | | static struct bfd_link_hash_table * |
281 | | elf64_alpha_bfd_link_hash_table_create (bfd *abfd) |
282 | 0 | { |
283 | 0 | struct alpha_elf_link_hash_table *ret; |
284 | 0 | size_t amt = sizeof (struct alpha_elf_link_hash_table); |
285 | |
|
286 | 0 | ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt); |
287 | 0 | if (ret == (struct alpha_elf_link_hash_table *) NULL) |
288 | 0 | return NULL; |
289 | | |
290 | 0 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
291 | 0 | elf64_alpha_link_hash_newfunc, |
292 | 0 | sizeof (struct alpha_elf_link_hash_entry), |
293 | 0 | ALPHA_ELF_DATA)) |
294 | 0 | { |
295 | 0 | free (ret); |
296 | 0 | return NULL; |
297 | 0 | } |
298 | | |
299 | 0 | return &ret->root.root; |
300 | 0 | } |
301 | | |
302 | | /* Alpha ELF follows MIPS ELF in using a special find_nearest_line |
303 | | routine in order to handle the ECOFF debugging information. */ |
304 | | |
305 | | struct alpha_elf_find_line |
306 | | { |
307 | | struct ecoff_debug_info d; |
308 | | struct ecoff_find_line i; |
309 | | }; |
310 | | |
311 | | /* We have some private fields hanging off of the elf_tdata structure. */ |
312 | | |
313 | | struct alpha_elf_obj_tdata |
314 | | { |
315 | | struct elf_obj_tdata root; |
316 | | |
317 | | /* For every input file, these are the got entries for that object's |
318 | | local symbols. */ |
319 | | struct alpha_elf_got_entry ** local_got_entries; |
320 | | |
321 | | /* For every input file, this is the object that owns the got that |
322 | | this input file uses. */ |
323 | | bfd *gotobj; |
324 | | |
325 | | /* For every got, this is a linked list through the objects using this got */ |
326 | | bfd *in_got_link_next; |
327 | | |
328 | | /* For every got, this is a link to the next got subsegment. */ |
329 | | bfd *got_link_next; |
330 | | |
331 | | /* For every got, this is the section. */ |
332 | | asection *got; |
333 | | |
334 | | /* For every got, this is it's total number of words. */ |
335 | | int total_got_size; |
336 | | |
337 | | /* For every got, this is the sum of the number of words required |
338 | | to hold all of the member object's local got. */ |
339 | | int local_got_size; |
340 | | |
341 | | /* Used by elf64_alpha_find_nearest_line entry point. */ |
342 | | struct alpha_elf_find_line *find_line_info; |
343 | | |
344 | | }; |
345 | | |
346 | | #define alpha_elf_tdata(abfd) \ |
347 | 0 | ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) |
348 | | |
349 | | #define is_alpha_elf(bfd) \ |
350 | 0 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
351 | 0 | && elf_tdata (bfd) != NULL \ |
352 | 0 | && elf_object_id (bfd) == ALPHA_ELF_DATA) |
353 | | |
354 | | static bool |
355 | | elf64_alpha_mkobject (bfd *abfd) |
356 | 2.19k | { |
357 | 2.19k | return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata), |
358 | 2.19k | ALPHA_ELF_DATA); |
359 | 2.19k | } |
360 | | |
361 | | static bool |
362 | | elf64_alpha_object_p (bfd *abfd) |
363 | 1 | { |
364 | | /* Set the right machine number for an Alpha ELF file. */ |
365 | 1 | return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); |
366 | 1 | } |
367 | | |
368 | | /* A relocation function which doesn't do anything. */ |
369 | | |
370 | | static bfd_reloc_status_type |
371 | | elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, |
372 | | asymbol *sym ATTRIBUTE_UNUSED, |
373 | | void * data ATTRIBUTE_UNUSED, asection *sec, |
374 | | bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) |
375 | 0 | { |
376 | 0 | if (output_bfd) |
377 | 0 | reloc->address += sec->output_offset; |
378 | 0 | return bfd_reloc_ok; |
379 | 0 | } |
380 | | |
381 | | /* A relocation function used for an unsupported reloc. */ |
382 | | |
383 | | static bfd_reloc_status_type |
384 | | elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, |
385 | | asymbol *sym ATTRIBUTE_UNUSED, |
386 | | void * data ATTRIBUTE_UNUSED, asection *sec, |
387 | | bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) |
388 | 0 | { |
389 | 0 | if (output_bfd) |
390 | 0 | reloc->address += sec->output_offset; |
391 | 0 | return bfd_reloc_notsupported; |
392 | 0 | } |
393 | | |
394 | | /* Do the work of the GPDISP relocation. */ |
395 | | |
396 | | static bfd_reloc_status_type |
397 | | elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah, |
398 | | bfd_byte *p_lda) |
399 | 0 | { |
400 | 0 | bfd_reloc_status_type ret = bfd_reloc_ok; |
401 | 0 | bfd_vma addend; |
402 | 0 | unsigned long i_ldah, i_lda; |
403 | |
|
404 | 0 | i_ldah = bfd_get_32 (abfd, p_ldah); |
405 | 0 | i_lda = bfd_get_32 (abfd, p_lda); |
406 | | |
407 | | /* Complain if the instructions are not correct. */ |
408 | 0 | if (((i_ldah >> 26) & 0x3f) != 0x09 |
409 | 0 | || ((i_lda >> 26) & 0x3f) != 0x08) |
410 | 0 | ret = bfd_reloc_dangerous; |
411 | | |
412 | | /* Extract the user-supplied offset, mirroring the sign extensions |
413 | | that the instructions perform. */ |
414 | 0 | addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); |
415 | 0 | addend = (addend ^ 0x80008000) - 0x80008000; |
416 | |
|
417 | 0 | gpdisp += addend; |
418 | |
|
419 | 0 | if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000 |
420 | 0 | || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000) |
421 | 0 | ret = bfd_reloc_overflow; |
422 | | |
423 | | /* compensate for the sign extension again. */ |
424 | 0 | i_ldah = ((i_ldah & 0xffff0000) |
425 | 0 | | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff)); |
426 | 0 | i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff); |
427 | |
|
428 | 0 | bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah); |
429 | 0 | bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda); |
430 | |
|
431 | 0 | return ret; |
432 | 0 | } |
433 | | |
434 | | /* The special function for the GPDISP reloc. */ |
435 | | |
436 | | static bfd_reloc_status_type |
437 | | elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry, |
438 | | asymbol *sym ATTRIBUTE_UNUSED, void * data, |
439 | | asection *input_section, bfd *output_bfd, |
440 | | char **err_msg) |
441 | 0 | { |
442 | 0 | bfd_reloc_status_type ret; |
443 | 0 | bfd_vma gp, relocation; |
444 | 0 | bfd_vma high_address; |
445 | 0 | bfd_byte *p_ldah, *p_lda; |
446 | | |
447 | | /* Don't do anything if we're not doing a final link. */ |
448 | 0 | if (output_bfd) |
449 | 0 | { |
450 | 0 | reloc_entry->address += input_section->output_offset; |
451 | 0 | return bfd_reloc_ok; |
452 | 0 | } |
453 | | |
454 | 0 | high_address = bfd_get_section_limit (abfd, input_section); |
455 | 0 | if (reloc_entry->address > high_address |
456 | 0 | || reloc_entry->address + reloc_entry->addend > high_address) |
457 | 0 | return bfd_reloc_outofrange; |
458 | | |
459 | | /* The gp used in the portion of the output object to which this |
460 | | input object belongs is cached on the input bfd. */ |
461 | 0 | gp = _bfd_get_gp_value (abfd); |
462 | |
|
463 | 0 | relocation = (input_section->output_section->vma |
464 | 0 | + input_section->output_offset |
465 | 0 | + reloc_entry->address); |
466 | |
|
467 | 0 | p_ldah = (bfd_byte *) data + reloc_entry->address; |
468 | 0 | p_lda = p_ldah + reloc_entry->addend; |
469 | |
|
470 | 0 | ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda); |
471 | | |
472 | | /* Complain if the instructions are not correct. */ |
473 | 0 | if (ret == bfd_reloc_dangerous) |
474 | 0 | *err_msg = _("GPDISP relocation did not find ldah and lda instructions"); |
475 | |
|
476 | 0 | return ret; |
477 | 0 | } |
478 | | |
479 | | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
480 | | from smaller values. Start with zero, widen, *then* decrement. */ |
481 | | #define MINUS_ONE (((bfd_vma)0) - 1) |
482 | | |
483 | | |
484 | | #define SKIP_HOWTO(N) \ |
485 | | HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0) |
486 | | |
487 | | static reloc_howto_type elf64_alpha_howto_table[] = |
488 | | { |
489 | | HOWTO (R_ALPHA_NONE, /* type */ |
490 | | 0, /* rightshift */ |
491 | | 0, /* size */ |
492 | | 0, /* bitsize */ |
493 | | true, /* pc_relative */ |
494 | | 0, /* bitpos */ |
495 | | complain_overflow_dont, /* complain_on_overflow */ |
496 | | elf64_alpha_reloc_nil, /* special_function */ |
497 | | "NONE", /* name */ |
498 | | false, /* partial_inplace */ |
499 | | 0, /* src_mask */ |
500 | | 0, /* dst_mask */ |
501 | | true), /* pcrel_offset */ |
502 | | |
503 | | /* A 32 bit reference to a symbol. */ |
504 | | HOWTO (R_ALPHA_REFLONG, /* type */ |
505 | | 0, /* rightshift */ |
506 | | 4, /* size */ |
507 | | 32, /* bitsize */ |
508 | | false, /* pc_relative */ |
509 | | 0, /* bitpos */ |
510 | | complain_overflow_bitfield, /* complain_on_overflow */ |
511 | | bfd_elf_generic_reloc, /* special_function */ |
512 | | "REFLONG", /* name */ |
513 | | false, /* partial_inplace */ |
514 | | 0xffffffff, /* src_mask */ |
515 | | 0xffffffff, /* dst_mask */ |
516 | | false), /* pcrel_offset */ |
517 | | |
518 | | /* A 64 bit reference to a symbol. */ |
519 | | HOWTO (R_ALPHA_REFQUAD, /* type */ |
520 | | 0, /* rightshift */ |
521 | | 8, /* size */ |
522 | | 64, /* bitsize */ |
523 | | false, /* pc_relative */ |
524 | | 0, /* bitpos */ |
525 | | complain_overflow_bitfield, /* complain_on_overflow */ |
526 | | bfd_elf_generic_reloc, /* special_function */ |
527 | | "REFQUAD", /* name */ |
528 | | false, /* partial_inplace */ |
529 | | MINUS_ONE, /* src_mask */ |
530 | | MINUS_ONE, /* dst_mask */ |
531 | | false), /* pcrel_offset */ |
532 | | |
533 | | /* A 32 bit GP relative offset. This is just like REFLONG except |
534 | | that when the value is used the value of the gp register will be |
535 | | added in. */ |
536 | | HOWTO (R_ALPHA_GPREL32, /* type */ |
537 | | 0, /* rightshift */ |
538 | | 4, /* size */ |
539 | | 32, /* bitsize */ |
540 | | false, /* pc_relative */ |
541 | | 0, /* bitpos */ |
542 | | complain_overflow_bitfield, /* complain_on_overflow */ |
543 | | bfd_elf_generic_reloc, /* special_function */ |
544 | | "GPREL32", /* name */ |
545 | | false, /* partial_inplace */ |
546 | | 0xffffffff, /* src_mask */ |
547 | | 0xffffffff, /* dst_mask */ |
548 | | false), /* pcrel_offset */ |
549 | | |
550 | | /* Used for an instruction that refers to memory off the GP register. */ |
551 | | HOWTO (R_ALPHA_LITERAL, /* type */ |
552 | | 0, /* rightshift */ |
553 | | 2, /* size */ |
554 | | 16, /* bitsize */ |
555 | | false, /* pc_relative */ |
556 | | 0, /* bitpos */ |
557 | | complain_overflow_signed, /* complain_on_overflow */ |
558 | | bfd_elf_generic_reloc, /* special_function */ |
559 | | "ELF_LITERAL", /* name */ |
560 | | false, /* partial_inplace */ |
561 | | 0xffff, /* src_mask */ |
562 | | 0xffff, /* dst_mask */ |
563 | | false), /* pcrel_offset */ |
564 | | |
565 | | /* This reloc only appears immediately following an ELF_LITERAL reloc. |
566 | | It identifies a use of the literal. The symbol index is special: |
567 | | 1 means the literal address is in the base register of a memory |
568 | | format instruction; 2 means the literal address is in the byte |
569 | | offset register of a byte-manipulation instruction; 3 means the |
570 | | literal address is in the target register of a jsr instruction. |
571 | | This does not actually do any relocation. */ |
572 | | HOWTO (R_ALPHA_LITUSE, /* type */ |
573 | | 0, /* rightshift */ |
574 | | 2, /* size */ |
575 | | 32, /* bitsize */ |
576 | | false, /* pc_relative */ |
577 | | 0, /* bitpos */ |
578 | | complain_overflow_dont, /* complain_on_overflow */ |
579 | | elf64_alpha_reloc_nil, /* special_function */ |
580 | | "LITUSE", /* name */ |
581 | | false, /* partial_inplace */ |
582 | | 0, /* src_mask */ |
583 | | 0, /* dst_mask */ |
584 | | false), /* pcrel_offset */ |
585 | | |
586 | | /* Load the gp register. This is always used for a ldah instruction |
587 | | which loads the upper 16 bits of the gp register. The symbol |
588 | | index of the GPDISP instruction is an offset in bytes to the lda |
589 | | instruction that loads the lower 16 bits. The value to use for |
590 | | the relocation is the difference between the GP value and the |
591 | | current location; the load will always be done against a register |
592 | | holding the current address. |
593 | | |
594 | | NOTE: Unlike ECOFF, partial in-place relocation is not done. If |
595 | | any offset is present in the instructions, it is an offset from |
596 | | the register to the ldah instruction. This lets us avoid any |
597 | | stupid hackery like inventing a gp value to do partial relocation |
598 | | against. Also unlike ECOFF, we do the whole relocation off of |
599 | | the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd, |
600 | | space consuming bit, that, since all the information was present |
601 | | in the GPDISP_HI16 reloc. */ |
602 | | HOWTO (R_ALPHA_GPDISP, /* type */ |
603 | | 16, /* rightshift */ |
604 | | 4, /* size */ |
605 | | 16, /* bitsize */ |
606 | | false, /* pc_relative */ |
607 | | 0, /* bitpos */ |
608 | | complain_overflow_dont, /* complain_on_overflow */ |
609 | | elf64_alpha_reloc_gpdisp, /* special_function */ |
610 | | "GPDISP", /* name */ |
611 | | false, /* partial_inplace */ |
612 | | 0xffff, /* src_mask */ |
613 | | 0xffff, /* dst_mask */ |
614 | | true), /* pcrel_offset */ |
615 | | |
616 | | /* A 21 bit branch. */ |
617 | | HOWTO (R_ALPHA_BRADDR, /* type */ |
618 | | 2, /* rightshift */ |
619 | | 4, /* size */ |
620 | | 21, /* bitsize */ |
621 | | true, /* pc_relative */ |
622 | | 0, /* bitpos */ |
623 | | complain_overflow_signed, /* complain_on_overflow */ |
624 | | bfd_elf_generic_reloc, /* special_function */ |
625 | | "BRADDR", /* name */ |
626 | | false, /* partial_inplace */ |
627 | | 0x1fffff, /* src_mask */ |
628 | | 0x1fffff, /* dst_mask */ |
629 | | true), /* pcrel_offset */ |
630 | | |
631 | | /* A hint for a jump to a register. */ |
632 | | HOWTO (R_ALPHA_HINT, /* type */ |
633 | | 2, /* rightshift */ |
634 | | 2, /* size */ |
635 | | 14, /* bitsize */ |
636 | | true, /* pc_relative */ |
637 | | 0, /* bitpos */ |
638 | | complain_overflow_dont, /* complain_on_overflow */ |
639 | | bfd_elf_generic_reloc, /* special_function */ |
640 | | "HINT", /* name */ |
641 | | false, /* partial_inplace */ |
642 | | 0x3fff, /* src_mask */ |
643 | | 0x3fff, /* dst_mask */ |
644 | | true), /* pcrel_offset */ |
645 | | |
646 | | /* 16 bit PC relative offset. */ |
647 | | HOWTO (R_ALPHA_SREL16, /* type */ |
648 | | 0, /* rightshift */ |
649 | | 2, /* size */ |
650 | | 16, /* bitsize */ |
651 | | true, /* pc_relative */ |
652 | | 0, /* bitpos */ |
653 | | complain_overflow_signed, /* complain_on_overflow */ |
654 | | bfd_elf_generic_reloc, /* special_function */ |
655 | | "SREL16", /* name */ |
656 | | false, /* partial_inplace */ |
657 | | 0xffff, /* src_mask */ |
658 | | 0xffff, /* dst_mask */ |
659 | | true), /* pcrel_offset */ |
660 | | |
661 | | /* 32 bit PC relative offset. */ |
662 | | HOWTO (R_ALPHA_SREL32, /* type */ |
663 | | 0, /* rightshift */ |
664 | | 4, /* size */ |
665 | | 32, /* bitsize */ |
666 | | true, /* pc_relative */ |
667 | | 0, /* bitpos */ |
668 | | complain_overflow_signed, /* complain_on_overflow */ |
669 | | bfd_elf_generic_reloc, /* special_function */ |
670 | | "SREL32", /* name */ |
671 | | false, /* partial_inplace */ |
672 | | 0xffffffff, /* src_mask */ |
673 | | 0xffffffff, /* dst_mask */ |
674 | | true), /* pcrel_offset */ |
675 | | |
676 | | /* A 64 bit PC relative offset. */ |
677 | | HOWTO (R_ALPHA_SREL64, /* type */ |
678 | | 0, /* rightshift */ |
679 | | 8, /* size */ |
680 | | 64, /* bitsize */ |
681 | | true, /* pc_relative */ |
682 | | 0, /* bitpos */ |
683 | | complain_overflow_signed, /* complain_on_overflow */ |
684 | | bfd_elf_generic_reloc, /* special_function */ |
685 | | "SREL64", /* name */ |
686 | | false, /* partial_inplace */ |
687 | | MINUS_ONE, /* src_mask */ |
688 | | MINUS_ONE, /* dst_mask */ |
689 | | true), /* pcrel_offset */ |
690 | | |
691 | | /* Skip 12 - 16; deprecated ECOFF relocs. */ |
692 | | SKIP_HOWTO (12), |
693 | | SKIP_HOWTO (13), |
694 | | SKIP_HOWTO (14), |
695 | | SKIP_HOWTO (15), |
696 | | SKIP_HOWTO (16), |
697 | | |
698 | | /* The high 16 bits of the displacement from GP to the target. */ |
699 | | HOWTO (R_ALPHA_GPRELHIGH, |
700 | | 0, /* rightshift */ |
701 | | 2, /* size */ |
702 | | 16, /* bitsize */ |
703 | | false, /* pc_relative */ |
704 | | 0, /* bitpos */ |
705 | | complain_overflow_signed, /* complain_on_overflow */ |
706 | | bfd_elf_generic_reloc, /* special_function */ |
707 | | "GPRELHIGH", /* name */ |
708 | | false, /* partial_inplace */ |
709 | | 0xffff, /* src_mask */ |
710 | | 0xffff, /* dst_mask */ |
711 | | false), /* pcrel_offset */ |
712 | | |
713 | | /* The low 16 bits of the displacement from GP to the target. */ |
714 | | HOWTO (R_ALPHA_GPRELLOW, |
715 | | 0, /* rightshift */ |
716 | | 2, /* size */ |
717 | | 16, /* bitsize */ |
718 | | false, /* pc_relative */ |
719 | | 0, /* bitpos */ |
720 | | complain_overflow_dont, /* complain_on_overflow */ |
721 | | bfd_elf_generic_reloc, /* special_function */ |
722 | | "GPRELLOW", /* name */ |
723 | | false, /* partial_inplace */ |
724 | | 0xffff, /* src_mask */ |
725 | | 0xffff, /* dst_mask */ |
726 | | false), /* pcrel_offset */ |
727 | | |
728 | | /* A 16-bit displacement from the GP to the target. */ |
729 | | HOWTO (R_ALPHA_GPREL16, |
730 | | 0, /* rightshift */ |
731 | | 2, /* size */ |
732 | | 16, /* bitsize */ |
733 | | false, /* pc_relative */ |
734 | | 0, /* bitpos */ |
735 | | complain_overflow_signed, /* complain_on_overflow */ |
736 | | bfd_elf_generic_reloc, /* special_function */ |
737 | | "GPREL16", /* name */ |
738 | | false, /* partial_inplace */ |
739 | | 0xffff, /* src_mask */ |
740 | | 0xffff, /* dst_mask */ |
741 | | false), /* pcrel_offset */ |
742 | | |
743 | | /* Skip 20 - 23; deprecated ECOFF relocs. */ |
744 | | SKIP_HOWTO (20), |
745 | | SKIP_HOWTO (21), |
746 | | SKIP_HOWTO (22), |
747 | | SKIP_HOWTO (23), |
748 | | |
749 | | /* Misc ELF relocations. */ |
750 | | |
751 | | /* A dynamic relocation to copy the target into our .dynbss section. */ |
752 | | /* Not generated, as all Alpha objects use PIC, so it is not needed. It |
753 | | is present because every other ELF has one, but should not be used |
754 | | because .dynbss is an ugly thing. */ |
755 | | HOWTO (R_ALPHA_COPY, |
756 | | 0, |
757 | | 0, |
758 | | 0, |
759 | | false, |
760 | | 0, |
761 | | complain_overflow_dont, |
762 | | bfd_elf_generic_reloc, |
763 | | "COPY", |
764 | | false, |
765 | | 0, |
766 | | 0, |
767 | | true), |
768 | | |
769 | | /* A dynamic relocation for a .got entry. */ |
770 | | HOWTO (R_ALPHA_GLOB_DAT, |
771 | | 0, |
772 | | 0, |
773 | | 0, |
774 | | false, |
775 | | 0, |
776 | | complain_overflow_dont, |
777 | | bfd_elf_generic_reloc, |
778 | | "GLOB_DAT", |
779 | | false, |
780 | | 0, |
781 | | 0, |
782 | | true), |
783 | | |
784 | | /* A dynamic relocation for a .plt entry. */ |
785 | | HOWTO (R_ALPHA_JMP_SLOT, |
786 | | 0, |
787 | | 0, |
788 | | 0, |
789 | | false, |
790 | | 0, |
791 | | complain_overflow_dont, |
792 | | bfd_elf_generic_reloc, |
793 | | "JMP_SLOT", |
794 | | false, |
795 | | 0, |
796 | | 0, |
797 | | true), |
798 | | |
799 | | /* A dynamic relocation to add the base of the DSO to a 64-bit field. */ |
800 | | HOWTO (R_ALPHA_RELATIVE, |
801 | | 0, |
802 | | 0, |
803 | | 0, |
804 | | false, |
805 | | 0, |
806 | | complain_overflow_dont, |
807 | | bfd_elf_generic_reloc, |
808 | | "RELATIVE", |
809 | | false, |
810 | | 0, |
811 | | 0, |
812 | | true), |
813 | | |
814 | | /* A 21 bit branch that adjusts for gp loads. */ |
815 | | HOWTO (R_ALPHA_BRSGP, /* type */ |
816 | | 2, /* rightshift */ |
817 | | 4, /* size */ |
818 | | 21, /* bitsize */ |
819 | | true, /* pc_relative */ |
820 | | 0, /* bitpos */ |
821 | | complain_overflow_signed, /* complain_on_overflow */ |
822 | | bfd_elf_generic_reloc, /* special_function */ |
823 | | "BRSGP", /* name */ |
824 | | false, /* partial_inplace */ |
825 | | 0x1fffff, /* src_mask */ |
826 | | 0x1fffff, /* dst_mask */ |
827 | | true), /* pcrel_offset */ |
828 | | |
829 | | /* Creates a tls_index for the symbol in the got. */ |
830 | | HOWTO (R_ALPHA_TLSGD, /* type */ |
831 | | 0, /* rightshift */ |
832 | | 2, /* size */ |
833 | | 16, /* bitsize */ |
834 | | false, /* pc_relative */ |
835 | | 0, /* bitpos */ |
836 | | complain_overflow_signed, /* complain_on_overflow */ |
837 | | bfd_elf_generic_reloc, /* special_function */ |
838 | | "TLSGD", /* name */ |
839 | | false, /* partial_inplace */ |
840 | | 0xffff, /* src_mask */ |
841 | | 0xffff, /* dst_mask */ |
842 | | false), /* pcrel_offset */ |
843 | | |
844 | | /* Creates a tls_index for the (current) module in the got. */ |
845 | | HOWTO (R_ALPHA_TLSLDM, /* type */ |
846 | | 0, /* rightshift */ |
847 | | 2, /* size */ |
848 | | 16, /* bitsize */ |
849 | | false, /* pc_relative */ |
850 | | 0, /* bitpos */ |
851 | | complain_overflow_signed, /* complain_on_overflow */ |
852 | | bfd_elf_generic_reloc, /* special_function */ |
853 | | "TLSLDM", /* name */ |
854 | | false, /* partial_inplace */ |
855 | | 0xffff, /* src_mask */ |
856 | | 0xffff, /* dst_mask */ |
857 | | false), /* pcrel_offset */ |
858 | | |
859 | | /* A dynamic relocation for a DTP module entry. */ |
860 | | HOWTO (R_ALPHA_DTPMOD64, /* type */ |
861 | | 0, /* rightshift */ |
862 | | 8, /* size */ |
863 | | 64, /* bitsize */ |
864 | | false, /* pc_relative */ |
865 | | 0, /* bitpos */ |
866 | | complain_overflow_bitfield, /* complain_on_overflow */ |
867 | | bfd_elf_generic_reloc, /* special_function */ |
868 | | "DTPMOD64", /* name */ |
869 | | false, /* partial_inplace */ |
870 | | MINUS_ONE, /* src_mask */ |
871 | | MINUS_ONE, /* dst_mask */ |
872 | | false), /* pcrel_offset */ |
873 | | |
874 | | /* Creates a 64-bit offset in the got for the displacement |
875 | | from DTP to the target. */ |
876 | | HOWTO (R_ALPHA_GOTDTPREL, /* type */ |
877 | | 0, /* rightshift */ |
878 | | 2, /* size */ |
879 | | 16, /* bitsize */ |
880 | | false, /* pc_relative */ |
881 | | 0, /* bitpos */ |
882 | | complain_overflow_signed, /* complain_on_overflow */ |
883 | | bfd_elf_generic_reloc, /* special_function */ |
884 | | "GOTDTPREL", /* name */ |
885 | | false, /* partial_inplace */ |
886 | | 0xffff, /* src_mask */ |
887 | | 0xffff, /* dst_mask */ |
888 | | false), /* pcrel_offset */ |
889 | | |
890 | | /* A dynamic relocation for a displacement from DTP to the target. */ |
891 | | HOWTO (R_ALPHA_DTPREL64, /* type */ |
892 | | 0, /* rightshift */ |
893 | | 8, /* size */ |
894 | | 64, /* bitsize */ |
895 | | false, /* pc_relative */ |
896 | | 0, /* bitpos */ |
897 | | complain_overflow_bitfield, /* complain_on_overflow */ |
898 | | bfd_elf_generic_reloc, /* special_function */ |
899 | | "DTPREL64", /* name */ |
900 | | false, /* partial_inplace */ |
901 | | MINUS_ONE, /* src_mask */ |
902 | | MINUS_ONE, /* dst_mask */ |
903 | | false), /* pcrel_offset */ |
904 | | |
905 | | /* The high 16 bits of the displacement from DTP to the target. */ |
906 | | HOWTO (R_ALPHA_DTPRELHI, /* type */ |
907 | | 0, /* rightshift */ |
908 | | 2, /* size */ |
909 | | 16, /* bitsize */ |
910 | | false, /* pc_relative */ |
911 | | 0, /* bitpos */ |
912 | | complain_overflow_signed, /* complain_on_overflow */ |
913 | | bfd_elf_generic_reloc, /* special_function */ |
914 | | "DTPRELHI", /* name */ |
915 | | false, /* partial_inplace */ |
916 | | 0xffff, /* src_mask */ |
917 | | 0xffff, /* dst_mask */ |
918 | | false), /* pcrel_offset */ |
919 | | |
920 | | /* The low 16 bits of the displacement from DTP to the target. */ |
921 | | HOWTO (R_ALPHA_DTPRELLO, /* type */ |
922 | | 0, /* rightshift */ |
923 | | 2, /* size */ |
924 | | 16, /* bitsize */ |
925 | | false, /* pc_relative */ |
926 | | 0, /* bitpos */ |
927 | | complain_overflow_dont, /* complain_on_overflow */ |
928 | | bfd_elf_generic_reloc, /* special_function */ |
929 | | "DTPRELLO", /* name */ |
930 | | false, /* partial_inplace */ |
931 | | 0xffff, /* src_mask */ |
932 | | 0xffff, /* dst_mask */ |
933 | | false), /* pcrel_offset */ |
934 | | |
935 | | /* A 16-bit displacement from DTP to the target. */ |
936 | | HOWTO (R_ALPHA_DTPREL16, /* type */ |
937 | | 0, /* rightshift */ |
938 | | 2, /* size */ |
939 | | 16, /* bitsize */ |
940 | | false, /* pc_relative */ |
941 | | 0, /* bitpos */ |
942 | | complain_overflow_signed, /* complain_on_overflow */ |
943 | | bfd_elf_generic_reloc, /* special_function */ |
944 | | "DTPREL16", /* name */ |
945 | | false, /* partial_inplace */ |
946 | | 0xffff, /* src_mask */ |
947 | | 0xffff, /* dst_mask */ |
948 | | false), /* pcrel_offset */ |
949 | | |
950 | | /* Creates a 64-bit offset in the got for the displacement |
951 | | from TP to the target. */ |
952 | | HOWTO (R_ALPHA_GOTTPREL, /* type */ |
953 | | 0, /* rightshift */ |
954 | | 2, /* size */ |
955 | | 16, /* bitsize */ |
956 | | false, /* pc_relative */ |
957 | | 0, /* bitpos */ |
958 | | complain_overflow_signed, /* complain_on_overflow */ |
959 | | bfd_elf_generic_reloc, /* special_function */ |
960 | | "GOTTPREL", /* name */ |
961 | | false, /* partial_inplace */ |
962 | | 0xffff, /* src_mask */ |
963 | | 0xffff, /* dst_mask */ |
964 | | false), /* pcrel_offset */ |
965 | | |
966 | | /* A dynamic relocation for a displacement from TP to the target. */ |
967 | | HOWTO (R_ALPHA_TPREL64, /* type */ |
968 | | 0, /* rightshift */ |
969 | | 8, /* size */ |
970 | | 64, /* bitsize */ |
971 | | false, /* pc_relative */ |
972 | | 0, /* bitpos */ |
973 | | complain_overflow_bitfield, /* complain_on_overflow */ |
974 | | bfd_elf_generic_reloc, /* special_function */ |
975 | | "TPREL64", /* name */ |
976 | | false, /* partial_inplace */ |
977 | | MINUS_ONE, /* src_mask */ |
978 | | MINUS_ONE, /* dst_mask */ |
979 | | false), /* pcrel_offset */ |
980 | | |
981 | | /* The high 16 bits of the displacement from TP to the target. */ |
982 | | HOWTO (R_ALPHA_TPRELHI, /* type */ |
983 | | 0, /* rightshift */ |
984 | | 2, /* size */ |
985 | | 16, /* bitsize */ |
986 | | false, /* pc_relative */ |
987 | | 0, /* bitpos */ |
988 | | complain_overflow_signed, /* complain_on_overflow */ |
989 | | bfd_elf_generic_reloc, /* special_function */ |
990 | | "TPRELHI", /* name */ |
991 | | false, /* partial_inplace */ |
992 | | 0xffff, /* src_mask */ |
993 | | 0xffff, /* dst_mask */ |
994 | | false), /* pcrel_offset */ |
995 | | |
996 | | /* The low 16 bits of the displacement from TP to the target. */ |
997 | | HOWTO (R_ALPHA_TPRELLO, /* type */ |
998 | | 0, /* rightshift */ |
999 | | 2, /* size */ |
1000 | | 16, /* bitsize */ |
1001 | | false, /* pc_relative */ |
1002 | | 0, /* bitpos */ |
1003 | | complain_overflow_dont, /* complain_on_overflow */ |
1004 | | bfd_elf_generic_reloc, /* special_function */ |
1005 | | "TPRELLO", /* name */ |
1006 | | false, /* partial_inplace */ |
1007 | | 0xffff, /* src_mask */ |
1008 | | 0xffff, /* dst_mask */ |
1009 | | false), /* pcrel_offset */ |
1010 | | |
1011 | | /* A 16-bit displacement from TP to the target. */ |
1012 | | HOWTO (R_ALPHA_TPREL16, /* type */ |
1013 | | 0, /* rightshift */ |
1014 | | 2, /* size */ |
1015 | | 16, /* bitsize */ |
1016 | | false, /* pc_relative */ |
1017 | | 0, /* bitpos */ |
1018 | | complain_overflow_signed, /* complain_on_overflow */ |
1019 | | bfd_elf_generic_reloc, /* special_function */ |
1020 | | "TPREL16", /* name */ |
1021 | | false, /* partial_inplace */ |
1022 | | 0xffff, /* src_mask */ |
1023 | | 0xffff, /* dst_mask */ |
1024 | | false), /* pcrel_offset */ |
1025 | | }; |
1026 | | |
1027 | | /* A mapping from BFD reloc types to Alpha ELF reloc types. */ |
1028 | | |
1029 | | struct elf_reloc_map |
1030 | | { |
1031 | | bfd_reloc_code_real_type bfd_reloc_val; |
1032 | | int elf_reloc_val; |
1033 | | }; |
1034 | | |
1035 | | static const struct elf_reloc_map elf64_alpha_reloc_map[] = |
1036 | | { |
1037 | | {BFD_RELOC_NONE, R_ALPHA_NONE}, |
1038 | | {BFD_RELOC_32, R_ALPHA_REFLONG}, |
1039 | | {BFD_RELOC_64, R_ALPHA_REFQUAD}, |
1040 | | {BFD_RELOC_CTOR, R_ALPHA_REFQUAD}, |
1041 | | {BFD_RELOC_GPREL32, R_ALPHA_GPREL32}, |
1042 | | {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL}, |
1043 | | {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE}, |
1044 | | {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP}, |
1045 | | {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR}, |
1046 | | {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT}, |
1047 | | {BFD_RELOC_16_PCREL, R_ALPHA_SREL16}, |
1048 | | {BFD_RELOC_32_PCREL, R_ALPHA_SREL32}, |
1049 | | {BFD_RELOC_64_PCREL, R_ALPHA_SREL64}, |
1050 | | {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH}, |
1051 | | {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW}, |
1052 | | {BFD_RELOC_GPREL16, R_ALPHA_GPREL16}, |
1053 | | {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP}, |
1054 | | {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD}, |
1055 | | {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM}, |
1056 | | {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64}, |
1057 | | {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL}, |
1058 | | {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64}, |
1059 | | {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI}, |
1060 | | {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO}, |
1061 | | {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16}, |
1062 | | {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL}, |
1063 | | {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64}, |
1064 | | {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI}, |
1065 | | {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO}, |
1066 | | {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16}, |
1067 | | }; |
1068 | | |
1069 | | /* Given a BFD reloc type, return a HOWTO structure. */ |
1070 | | |
1071 | | static reloc_howto_type * |
1072 | | elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
1073 | | bfd_reloc_code_real_type code) |
1074 | 0 | { |
1075 | 0 | const struct elf_reloc_map *i, *e; |
1076 | 0 | i = e = elf64_alpha_reloc_map; |
1077 | 0 | e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map); |
1078 | 0 | for (; i != e; ++i) |
1079 | 0 | { |
1080 | 0 | if (i->bfd_reloc_val == code) |
1081 | 0 | return &elf64_alpha_howto_table[i->elf_reloc_val]; |
1082 | 0 | } |
1083 | 0 | return 0; |
1084 | 0 | } |
1085 | | |
1086 | | static reloc_howto_type * |
1087 | | elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
1088 | | const char *r_name) |
1089 | 0 | { |
1090 | 0 | unsigned int i; |
1091 | |
|
1092 | 0 | for (i = 0; |
1093 | 0 | i < (sizeof (elf64_alpha_howto_table) |
1094 | 0 | / sizeof (elf64_alpha_howto_table[0])); |
1095 | 0 | i++) |
1096 | 0 | if (elf64_alpha_howto_table[i].name != NULL |
1097 | 0 | && strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0) |
1098 | 0 | return &elf64_alpha_howto_table[i]; |
1099 | | |
1100 | 0 | return NULL; |
1101 | 0 | } |
1102 | | |
1103 | | /* Given an Alpha ELF reloc type, fill in an arelent structure. */ |
1104 | | |
1105 | | static bool |
1106 | | elf64_alpha_info_to_howto (bfd *abfd, arelent *cache_ptr, |
1107 | | Elf_Internal_Rela *dst) |
1108 | 0 | { |
1109 | 0 | unsigned r_type = ELF64_R_TYPE(dst->r_info); |
1110 | |
|
1111 | 0 | if (r_type >= R_ALPHA_max) |
1112 | 0 | { |
1113 | | /* xgettext:c-format */ |
1114 | 0 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
1115 | 0 | abfd, r_type); |
1116 | 0 | bfd_set_error (bfd_error_bad_value); |
1117 | 0 | return false; |
1118 | 0 | } |
1119 | 0 | cache_ptr->howto = &elf64_alpha_howto_table[r_type]; |
1120 | 0 | return true; |
1121 | 0 | } |
1122 | | |
1123 | | /* These two relocations create a two-word entry in the got. */ |
1124 | | #define alpha_got_entry_size(r_type) \ |
1125 | 0 | (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8) |
1126 | | |
1127 | | /* This is PT_TLS segment p_vaddr. */ |
1128 | | #define alpha_get_dtprel_base(info) \ |
1129 | 0 | (elf_hash_table (info)->tls_sec->vma) |
1130 | | |
1131 | | /* Main program TLS (whose template starts at PT_TLS p_vaddr) |
1132 | | is assigned offset round(16, PT_TLS p_align). */ |
1133 | | #define alpha_get_tprel_base(info) \ |
1134 | 0 | (elf_hash_table (info)->tls_sec->vma \ |
1135 | 0 | - align_power ((bfd_vma) 16, \ |
1136 | 0 | elf_hash_table (info)->tls_sec->alignment_power)) |
1137 | | |
1138 | | /* Handle an Alpha specific section when reading an object file. This |
1139 | | is called when bfd_section_from_shdr finds a section with an unknown |
1140 | | type. */ |
1141 | | |
1142 | | static bool |
1143 | | elf64_alpha_section_from_shdr (bfd *abfd, |
1144 | | Elf_Internal_Shdr *hdr, |
1145 | | const char *name, |
1146 | | int shindex) |
1147 | 0 | { |
1148 | 0 | asection *newsect; |
1149 | | |
1150 | | /* There ought to be a place to keep ELF backend specific flags, but |
1151 | | at the moment there isn't one. We just keep track of the |
1152 | | sections by their name, instead. Fortunately, the ABI gives |
1153 | | suggested names for all the MIPS specific sections, so we will |
1154 | | probably get away with this. */ |
1155 | 0 | switch (hdr->sh_type) |
1156 | 0 | { |
1157 | 0 | case SHT_ALPHA_DEBUG: |
1158 | 0 | if (strcmp (name, ".mdebug") != 0) |
1159 | 0 | return false; |
1160 | 0 | break; |
1161 | 0 | default: |
1162 | 0 | return false; |
1163 | 0 | } |
1164 | | |
1165 | 0 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
1166 | 0 | return false; |
1167 | 0 | newsect = hdr->bfd_section; |
1168 | |
|
1169 | 0 | if (hdr->sh_type == SHT_ALPHA_DEBUG) |
1170 | 0 | { |
1171 | 0 | if (!bfd_set_section_flags (newsect, |
1172 | 0 | bfd_section_flags (newsect) | SEC_DEBUGGING)) |
1173 | 0 | return false; |
1174 | 0 | } |
1175 | | |
1176 | 0 | return true; |
1177 | 0 | } |
1178 | | |
1179 | | /* Convert Alpha specific section flags to bfd internal section flags. */ |
1180 | | |
1181 | | static bool |
1182 | | elf64_alpha_section_flags (const Elf_Internal_Shdr *hdr) |
1183 | 27 | { |
1184 | 27 | if (hdr->sh_flags & SHF_ALPHA_GPREL) |
1185 | 2 | hdr->bfd_section->flags |= SEC_SMALL_DATA; |
1186 | | |
1187 | 27 | return true; |
1188 | 27 | } |
1189 | | |
1190 | | /* Set the correct type for an Alpha ELF section. We do this by the |
1191 | | section name, which is a hack, but ought to work. */ |
1192 | | |
1193 | | static bool |
1194 | | elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec) |
1195 | 0 | { |
1196 | 0 | register const char *name; |
1197 | |
|
1198 | 0 | name = bfd_section_name (sec); |
1199 | |
|
1200 | 0 | if (strcmp (name, ".mdebug") == 0) |
1201 | 0 | { |
1202 | 0 | hdr->sh_type = SHT_ALPHA_DEBUG; |
1203 | | /* In a shared object on Irix 5.3, the .mdebug section has an |
1204 | | entsize of 0. FIXME: Does this matter? */ |
1205 | 0 | if ((abfd->flags & DYNAMIC) != 0 ) |
1206 | 0 | hdr->sh_entsize = 0; |
1207 | 0 | else |
1208 | 0 | hdr->sh_entsize = 1; |
1209 | 0 | } |
1210 | 0 | else if ((sec->flags & SEC_SMALL_DATA) |
1211 | 0 | || strcmp (name, ".sdata") == 0 |
1212 | 0 | || strcmp (name, ".sbss") == 0 |
1213 | 0 | || strcmp (name, ".lit4") == 0 |
1214 | 0 | || strcmp (name, ".lit8") == 0) |
1215 | 0 | hdr->sh_flags |= SHF_ALPHA_GPREL; |
1216 | |
|
1217 | 0 | return true; |
1218 | 0 | } |
1219 | | |
1220 | | /* Hook called by the linker routine which adds symbols from an object |
1221 | | file. We use it to put .comm items in .sbss, and not .bss. */ |
1222 | | |
1223 | | static bool |
1224 | | elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, |
1225 | | Elf_Internal_Sym *sym, |
1226 | | const char **namep ATTRIBUTE_UNUSED, |
1227 | | flagword *flagsp ATTRIBUTE_UNUSED, |
1228 | | asection **secp, bfd_vma *valp) |
1229 | 0 | { |
1230 | 0 | if (sym->st_shndx == SHN_COMMON |
1231 | 0 | && !bfd_link_relocatable (info) |
1232 | 0 | && sym->st_size <= elf_gp_size (abfd)) |
1233 | 0 | { |
1234 | | /* Common symbols less than or equal to -G nn bytes are |
1235 | | automatically put into .sbss. */ |
1236 | |
|
1237 | 0 | asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); |
1238 | |
|
1239 | 0 | if (scomm == NULL) |
1240 | 0 | { |
1241 | 0 | scomm = bfd_make_section_with_flags (abfd, ".scommon", |
1242 | 0 | (SEC_ALLOC |
1243 | 0 | | SEC_IS_COMMON |
1244 | 0 | | SEC_SMALL_DATA |
1245 | 0 | | SEC_LINKER_CREATED)); |
1246 | 0 | if (scomm == NULL) |
1247 | 0 | return false; |
1248 | 0 | } |
1249 | | |
1250 | 0 | *secp = scomm; |
1251 | 0 | *valp = sym->st_size; |
1252 | 0 | } |
1253 | | |
1254 | 0 | return true; |
1255 | 0 | } |
1256 | | |
1257 | | /* Create the .got section. */ |
1258 | | |
1259 | | static bool |
1260 | | elf64_alpha_create_got_section (bfd *abfd, |
1261 | | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
1262 | 0 | { |
1263 | 0 | flagword flags; |
1264 | 0 | asection *s; |
1265 | |
|
1266 | 0 | if (! is_alpha_elf (abfd)) |
1267 | 0 | return false; |
1268 | | |
1269 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1270 | 0 | | SEC_LINKER_CREATED); |
1271 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
1272 | 0 | if (s == NULL |
1273 | 0 | || !bfd_set_section_alignment (s, 3)) |
1274 | 0 | return false; |
1275 | | |
1276 | 0 | 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 | 0 | alpha_elf_tdata (abfd)->gotobj = abfd; |
1282 | |
|
1283 | 0 | return true; |
1284 | 0 | } |
1285 | | |
1286 | | /* Create all the dynamic sections. */ |
1287 | | |
1288 | | static bool |
1289 | | elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
1290 | 0 | { |
1291 | 0 | asection *s; |
1292 | 0 | flagword flags; |
1293 | 0 | struct elf_link_hash_entry *h; |
1294 | |
|
1295 | 0 | if (! is_alpha_elf (abfd)) |
1296 | 0 | return false; |
1297 | | |
1298 | | /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ |
1299 | | |
1300 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1301 | 0 | | SEC_LINKER_CREATED |
1302 | 0 | | (elf64_alpha_use_secureplt ? SEC_READONLY : 0)); |
1303 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags); |
1304 | 0 | elf_hash_table (info)->splt = s; |
1305 | 0 | if (s == NULL || ! bfd_set_section_alignment (s, 4)) |
1306 | 0 | return false; |
1307 | | |
1308 | | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
1309 | | .plt section. */ |
1310 | 0 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
1311 | 0 | "_PROCEDURE_LINKAGE_TABLE_"); |
1312 | 0 | elf_hash_table (info)->hplt = h; |
1313 | 0 | if (h == NULL) |
1314 | 0 | return false; |
1315 | | |
1316 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1317 | 0 | | SEC_LINKER_CREATED | SEC_READONLY); |
1318 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags); |
1319 | 0 | elf_hash_table (info)->srelplt = s; |
1320 | 0 | if (s == NULL || ! bfd_set_section_alignment (s, 3)) |
1321 | 0 | return false; |
1322 | | |
1323 | 0 | if (elf64_alpha_use_secureplt) |
1324 | 0 | { |
1325 | 0 | flags = SEC_ALLOC | SEC_LINKER_CREATED; |
1326 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
1327 | 0 | elf_hash_table (info)->sgotplt = s; |
1328 | 0 | if (s == NULL || ! bfd_set_section_alignment (s, 3)) |
1329 | 0 | return false; |
1330 | 0 | } |
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 | 0 | if (alpha_elf_tdata(abfd)->gotobj == NULL) |
1336 | 0 | { |
1337 | 0 | if (!elf64_alpha_create_got_section (abfd, info)) |
1338 | 0 | return false; |
1339 | 0 | } |
1340 | | |
1341 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1342 | 0 | | SEC_LINKER_CREATED | SEC_READONLY); |
1343 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags); |
1344 | 0 | elf_hash_table (info)->srelgot = s; |
1345 | 0 | if (s == NULL |
1346 | 0 | || !bfd_set_section_alignment (s, 3)) |
1347 | 0 | 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 | 0 | h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got, |
1354 | 0 | "_GLOBAL_OFFSET_TABLE_"); |
1355 | 0 | elf_hash_table (info)->hgot = h; |
1356 | 0 | if (h == NULL) |
1357 | 0 | return false; |
1358 | | |
1359 | 0 | return true; |
1360 | 0 | } |
1361 | | |
1362 | | /* Read ECOFF debugging information from a .mdebug section into a |
1363 | | ecoff_debug_info structure. */ |
1364 | | |
1365 | | static bool |
1366 | | elf64_alpha_read_ecoff_info (bfd *abfd, asection *section, |
1367 | | struct ecoff_debug_info *debug) |
1368 | 0 | { |
1369 | 0 | HDRR *symhdr; |
1370 | 0 | const struct ecoff_debug_swap *swap; |
1371 | 0 | char *ext_hdr = NULL; |
1372 | |
|
1373 | 0 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
1374 | 0 | memset (debug, 0, sizeof (*debug)); |
1375 | |
|
1376 | 0 | ext_hdr = (char *) bfd_malloc (swap->external_hdr_size); |
1377 | 0 | if (ext_hdr == NULL && swap->external_hdr_size != 0) |
1378 | 0 | goto error_return; |
1379 | | |
1380 | 0 | if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, |
1381 | 0 | swap->external_hdr_size)) |
1382 | 0 | goto error_return; |
1383 | | |
1384 | 0 | symhdr = &debug->symbolic_header; |
1385 | 0 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); |
1386 | | |
1387 | | /* The symbolic header contains absolute file offsets and sizes to |
1388 | | read. */ |
1389 | 0 | #define READ(ptr, offset, count, size, type) \ |
1390 | 0 | do \ |
1391 | 0 | { \ |
1392 | 0 | size_t amt; \ |
1393 | 0 | debug->ptr = NULL; \ |
1394 | 0 | if (symhdr->count == 0) \ |
1395 | 0 | break; \ |
1396 | 0 | if (_bfd_mul_overflow (size, symhdr->count, &amt)) \ |
1397 | 0 | { \ |
1398 | 0 | bfd_set_error (bfd_error_file_too_big); \ |
1399 | 0 | goto error_return; \ |
1400 | 0 | } \ |
1401 | 0 | if (bfd_seek (abfd, symhdr->offset, SEEK_SET) != 0) \ |
1402 | 0 | goto error_return; \ |
1403 | 0 | debug->ptr = (type) _bfd_malloc_and_read (abfd, amt, amt); \ |
1404 | 0 | if (debug->ptr == NULL) \ |
1405 | 0 | goto error_return; \ |
1406 | 0 | } while (0) |
1407 | |
|
1408 | 0 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); |
1409 | 0 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *); |
1410 | 0 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *); |
1411 | 0 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *); |
1412 | 0 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *); |
1413 | 0 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), |
1414 | 0 | union aux_ext *); |
1415 | 0 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); |
1416 | 0 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); |
1417 | 0 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *); |
1418 | 0 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *); |
1419 | 0 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *); |
1420 | 0 | #undef READ |
1421 | | |
1422 | 0 | debug->fdr = NULL; |
1423 | |
|
1424 | 0 | return true; |
1425 | | |
1426 | 0 | error_return: |
1427 | 0 | free (ext_hdr); |
1428 | 0 | _bfd_ecoff_free_ecoff_debug_info (debug); |
1429 | 0 | return false; |
1430 | 0 | } |
1431 | | |
1432 | | /* Alpha ELF local labels start with '$'. */ |
1433 | | |
1434 | | static bool |
1435 | | elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) |
1436 | 0 | { |
1437 | 0 | return name[0] == '$'; |
1438 | 0 | } |
1439 | | |
1440 | | static bool |
1441 | | elf64_alpha_find_nearest_line (bfd *abfd, asymbol **symbols, |
1442 | | asection *section, bfd_vma offset, |
1443 | | const char **filename_ptr, |
1444 | | const char **functionname_ptr, |
1445 | | unsigned int *line_ptr, |
1446 | | unsigned int *discriminator_ptr) |
1447 | 0 | { |
1448 | 0 | asection *msec; |
1449 | |
|
1450 | 0 | if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, |
1451 | 0 | filename_ptr, functionname_ptr, |
1452 | 0 | line_ptr, discriminator_ptr, |
1453 | 0 | dwarf_debug_sections, |
1454 | 0 | &elf_tdata (abfd)->dwarf2_find_line_info) |
1455 | 0 | == 1) |
1456 | 0 | return true; |
1457 | | |
1458 | 0 | msec = bfd_get_section_by_name (abfd, ".mdebug"); |
1459 | 0 | if (msec != NULL) |
1460 | 0 | { |
1461 | 0 | flagword origflags; |
1462 | 0 | struct alpha_elf_find_line *fi; |
1463 | 0 | const struct ecoff_debug_swap * const swap = |
1464 | 0 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
1465 | | |
1466 | | /* If we are called during a link, alpha_elf_final_link may have |
1467 | | cleared the SEC_HAS_CONTENTS field. We force it back on here |
1468 | | if appropriate (which it normally will be). */ |
1469 | 0 | origflags = msec->flags; |
1470 | 0 | if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) |
1471 | 0 | msec->flags |= SEC_HAS_CONTENTS; |
1472 | |
|
1473 | 0 | fi = alpha_elf_tdata (abfd)->find_line_info; |
1474 | 0 | if (fi == NULL) |
1475 | 0 | { |
1476 | 0 | bfd_size_type external_fdr_size; |
1477 | 0 | char *fraw_src; |
1478 | 0 | char *fraw_end; |
1479 | 0 | struct fdr *fdr_ptr; |
1480 | 0 | bfd_size_type amt = sizeof (struct alpha_elf_find_line); |
1481 | |
|
1482 | 0 | fi = (struct alpha_elf_find_line *) bfd_zalloc (abfd, amt); |
1483 | 0 | if (fi == NULL) |
1484 | 0 | { |
1485 | 0 | msec->flags = origflags; |
1486 | 0 | return false; |
1487 | 0 | } |
1488 | | |
1489 | 0 | if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) |
1490 | 0 | { |
1491 | 0 | msec->flags = origflags; |
1492 | 0 | return false; |
1493 | 0 | } |
1494 | | |
1495 | | /* Swap in the FDR information. */ |
1496 | 0 | amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr); |
1497 | 0 | fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt); |
1498 | 0 | if (fi->d.fdr == NULL) |
1499 | 0 | { |
1500 | 0 | msec->flags = origflags; |
1501 | 0 | return false; |
1502 | 0 | } |
1503 | 0 | external_fdr_size = swap->external_fdr_size; |
1504 | 0 | fdr_ptr = fi->d.fdr; |
1505 | 0 | fraw_src = (char *) fi->d.external_fdr; |
1506 | 0 | fraw_end = (fraw_src |
1507 | 0 | + fi->d.symbolic_header.ifdMax * external_fdr_size); |
1508 | 0 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) |
1509 | 0 | (*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr); |
1510 | |
|
1511 | 0 | alpha_elf_tdata (abfd)->find_line_info = fi; |
1512 | 0 | } |
1513 | | |
1514 | 0 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, |
1515 | 0 | &fi->i, filename_ptr, functionname_ptr, |
1516 | 0 | line_ptr)) |
1517 | 0 | { |
1518 | 0 | msec->flags = origflags; |
1519 | 0 | return true; |
1520 | 0 | } |
1521 | | |
1522 | 0 | msec->flags = origflags; |
1523 | 0 | } |
1524 | | |
1525 | | /* Fall back on the generic ELF find_nearest_line routine. */ |
1526 | | |
1527 | 0 | return _bfd_elf_find_nearest_line (abfd, symbols, section, offset, |
1528 | 0 | filename_ptr, functionname_ptr, |
1529 | 0 | line_ptr, discriminator_ptr); |
1530 | 0 | } |
1531 | | |
1532 | | /* Structure used to pass information to alpha_elf_output_extsym. */ |
1533 | | |
1534 | | struct extsym_info |
1535 | | { |
1536 | | bfd *abfd; |
1537 | | struct bfd_link_info *info; |
1538 | | struct ecoff_debug_info *debug; |
1539 | | const struct ecoff_debug_swap *swap; |
1540 | | bool failed; |
1541 | | }; |
1542 | | |
1543 | | static bool |
1544 | | elf64_alpha_output_extsym (struct elf_link_hash_entry *x, void * data) |
1545 | 0 | { |
1546 | 0 | struct alpha_elf_link_hash_entry *h = (struct alpha_elf_link_hash_entry *) x; |
1547 | 0 | struct extsym_info *einfo = (struct extsym_info *) data; |
1548 | 0 | bool strip; |
1549 | 0 | asection *sec, *output_section; |
1550 | |
|
1551 | 0 | if (h->root.indx == -2) |
1552 | 0 | strip = false; |
1553 | 0 | else if ((h->root.def_dynamic |
1554 | 0 | || h->root.ref_dynamic |
1555 | 0 | || h->root.root.type == bfd_link_hash_new) |
1556 | 0 | && !h->root.def_regular |
1557 | 0 | && !h->root.ref_regular) |
1558 | 0 | strip = true; |
1559 | 0 | else if (einfo->info->strip == strip_all |
1560 | 0 | || (einfo->info->strip == strip_some |
1561 | 0 | && bfd_hash_lookup (einfo->info->keep_hash, |
1562 | 0 | h->root.root.root.string, |
1563 | 0 | false, false) == NULL)) |
1564 | 0 | strip = true; |
1565 | 0 | else |
1566 | 0 | strip = false; |
1567 | |
|
1568 | 0 | if (strip) |
1569 | 0 | return true; |
1570 | | |
1571 | 0 | if (h->esym.ifd == -2) |
1572 | 0 | { |
1573 | 0 | h->esym.jmptbl = 0; |
1574 | 0 | h->esym.cobol_main = 0; |
1575 | 0 | h->esym.weakext = 0; |
1576 | 0 | h->esym.reserved = 0; |
1577 | 0 | h->esym.ifd = ifdNil; |
1578 | 0 | h->esym.asym.value = 0; |
1579 | 0 | h->esym.asym.st = stGlobal; |
1580 | |
|
1581 | 0 | if (h->root.root.type != bfd_link_hash_defined |
1582 | 0 | && h->root.root.type != bfd_link_hash_defweak) |
1583 | 0 | h->esym.asym.sc = scAbs; |
1584 | 0 | else |
1585 | 0 | { |
1586 | 0 | const char *name; |
1587 | |
|
1588 | 0 | sec = h->root.root.u.def.section; |
1589 | 0 | output_section = sec->output_section; |
1590 | | |
1591 | | /* When making a shared library and symbol h is the one from |
1592 | | the another shared library, OUTPUT_SECTION may be null. */ |
1593 | 0 | if (output_section == NULL) |
1594 | 0 | h->esym.asym.sc = scUndefined; |
1595 | 0 | else |
1596 | 0 | { |
1597 | 0 | name = bfd_section_name (output_section); |
1598 | |
|
1599 | 0 | if (strcmp (name, ".text") == 0) |
1600 | 0 | h->esym.asym.sc = scText; |
1601 | 0 | else if (strcmp (name, ".data") == 0) |
1602 | 0 | h->esym.asym.sc = scData; |
1603 | 0 | else if (strcmp (name, ".sdata") == 0) |
1604 | 0 | h->esym.asym.sc = scSData; |
1605 | 0 | else if (strcmp (name, ".rodata") == 0 |
1606 | 0 | || strcmp (name, ".rdata") == 0) |
1607 | 0 | h->esym.asym.sc = scRData; |
1608 | 0 | else if (strcmp (name, ".bss") == 0) |
1609 | 0 | h->esym.asym.sc = scBss; |
1610 | 0 | else if (strcmp (name, ".sbss") == 0) |
1611 | 0 | h->esym.asym.sc = scSBss; |
1612 | 0 | else if (strcmp (name, ".init") == 0) |
1613 | 0 | h->esym.asym.sc = scInit; |
1614 | 0 | else if (strcmp (name, ".fini") == 0) |
1615 | 0 | h->esym.asym.sc = scFini; |
1616 | 0 | else |
1617 | 0 | h->esym.asym.sc = scAbs; |
1618 | 0 | } |
1619 | 0 | } |
1620 | |
|
1621 | 0 | h->esym.asym.reserved = 0; |
1622 | 0 | h->esym.asym.index = indexNil; |
1623 | 0 | } |
1624 | |
|
1625 | 0 | if (h->root.root.type == bfd_link_hash_common) |
1626 | 0 | h->esym.asym.value = h->root.root.u.c.size; |
1627 | 0 | else if (h->root.root.type == bfd_link_hash_defined |
1628 | 0 | || h->root.root.type == bfd_link_hash_defweak) |
1629 | 0 | { |
1630 | 0 | if (h->esym.asym.sc == scCommon) |
1631 | 0 | h->esym.asym.sc = scBss; |
1632 | 0 | else if (h->esym.asym.sc == scSCommon) |
1633 | 0 | h->esym.asym.sc = scSBss; |
1634 | |
|
1635 | 0 | sec = h->root.root.u.def.section; |
1636 | 0 | output_section = sec->output_section; |
1637 | 0 | if (output_section != NULL) |
1638 | 0 | h->esym.asym.value = (h->root.root.u.def.value |
1639 | 0 | + sec->output_offset |
1640 | 0 | + output_section->vma); |
1641 | 0 | else |
1642 | 0 | h->esym.asym.value = 0; |
1643 | 0 | } |
1644 | |
|
1645 | 0 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, |
1646 | 0 | h->root.root.root.string, |
1647 | 0 | &h->esym)) |
1648 | 0 | { |
1649 | 0 | einfo->failed = true; |
1650 | 0 | return false; |
1651 | 0 | } |
1652 | | |
1653 | 0 | return true; |
1654 | 0 | } |
1655 | | |
1656 | | /* Search for and possibly create a got entry. */ |
1657 | | |
1658 | | static struct alpha_elf_got_entry * |
1659 | | get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h, |
1660 | | unsigned long r_type, unsigned long r_symndx, |
1661 | | bfd_vma r_addend) |
1662 | 0 | { |
1663 | 0 | struct alpha_elf_got_entry *gotent; |
1664 | 0 | struct alpha_elf_got_entry **slot; |
1665 | |
|
1666 | 0 | if (h) |
1667 | 0 | slot = &h->got_entries; |
1668 | 0 | else |
1669 | 0 | { |
1670 | | /* This is a local .got entry -- record for merge. */ |
1671 | |
|
1672 | 0 | struct alpha_elf_got_entry **local_got_entries; |
1673 | |
|
1674 | 0 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; |
1675 | 0 | if (!local_got_entries) |
1676 | 0 | { |
1677 | 0 | bfd_size_type size; |
1678 | 0 | Elf_Internal_Shdr *symtab_hdr; |
1679 | |
|
1680 | 0 | symtab_hdr = &elf_tdata(abfd)->symtab_hdr; |
1681 | 0 | size = symtab_hdr->sh_info; |
1682 | 0 | size *= sizeof (struct alpha_elf_got_entry *); |
1683 | |
|
1684 | 0 | local_got_entries |
1685 | 0 | = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size); |
1686 | 0 | if (!local_got_entries) |
1687 | 0 | return NULL; |
1688 | | |
1689 | 0 | alpha_elf_tdata (abfd)->local_got_entries = local_got_entries; |
1690 | 0 | } |
1691 | | |
1692 | 0 | slot = &local_got_entries[r_symndx]; |
1693 | 0 | } |
1694 | | |
1695 | 0 | for (gotent = *slot; gotent ; gotent = gotent->next) |
1696 | 0 | if (gotent->gotobj == abfd |
1697 | 0 | && gotent->reloc_type == r_type |
1698 | 0 | && gotent->addend == r_addend) |
1699 | 0 | break; |
1700 | |
|
1701 | 0 | if (!gotent) |
1702 | 0 | { |
1703 | 0 | int entry_size; |
1704 | 0 | size_t amt; |
1705 | |
|
1706 | 0 | amt = sizeof (struct alpha_elf_got_entry); |
1707 | 0 | gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt); |
1708 | 0 | if (!gotent) |
1709 | 0 | return NULL; |
1710 | | |
1711 | 0 | gotent->gotobj = abfd; |
1712 | 0 | gotent->addend = r_addend; |
1713 | 0 | gotent->got_offset = -1; |
1714 | 0 | gotent->plt_offset = -1; |
1715 | 0 | gotent->use_count = 1; |
1716 | 0 | gotent->reloc_type = r_type; |
1717 | 0 | gotent->reloc_done = 0; |
1718 | 0 | gotent->reloc_xlated = 0; |
1719 | |
|
1720 | 0 | gotent->next = *slot; |
1721 | 0 | *slot = gotent; |
1722 | |
|
1723 | 0 | entry_size = alpha_got_entry_size (r_type); |
1724 | 0 | alpha_elf_tdata (abfd)->total_got_size += entry_size; |
1725 | 0 | if (!h) |
1726 | 0 | alpha_elf_tdata(abfd)->local_got_size += entry_size; |
1727 | 0 | } |
1728 | 0 | else |
1729 | 0 | gotent->use_count += 1; |
1730 | | |
1731 | 0 | return gotent; |
1732 | 0 | } |
1733 | | |
1734 | | static bool |
1735 | | elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah) |
1736 | 0 | { |
1737 | 0 | return ((ah->root.type == STT_FUNC |
1738 | 0 | || ah->root.root.type == bfd_link_hash_undefweak |
1739 | 0 | || ah->root.root.type == bfd_link_hash_undefined) |
1740 | 0 | && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0 |
1741 | 0 | && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0); |
1742 | 0 | } |
1743 | | |
1744 | | /* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset. |
1745 | | Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE |
1746 | | as is. On the other hand, elf-eh-frame.c processing requires .eh_frame |
1747 | | relocs to be sorted. */ |
1748 | | |
1749 | | static bool |
1750 | | elf64_alpha_sort_relocs_p (asection *sec) |
1751 | 0 | { |
1752 | 0 | return (sec->flags & SEC_CODE) == 0; |
1753 | 0 | } |
1754 | | |
1755 | | |
1756 | | /* Handle dynamic relocations when doing an Alpha ELF link. */ |
1757 | | |
1758 | | static bool |
1759 | | elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1760 | | asection *sec, const Elf_Internal_Rela *relocs) |
1761 | 0 | { |
1762 | 0 | bfd *dynobj; |
1763 | 0 | asection *sreloc; |
1764 | 0 | Elf_Internal_Shdr *symtab_hdr; |
1765 | 0 | struct alpha_elf_link_hash_entry **sym_hashes; |
1766 | 0 | const Elf_Internal_Rela *rel, *relend; |
1767 | |
|
1768 | 0 | if (bfd_link_relocatable (info)) |
1769 | 0 | return true; |
1770 | | |
1771 | 0 | BFD_ASSERT (is_alpha_elf (abfd)); |
1772 | |
|
1773 | 0 | dynobj = elf_hash_table (info)->dynobj; |
1774 | 0 | if (dynobj == NULL) |
1775 | 0 | elf_hash_table (info)->dynobj = dynobj = abfd; |
1776 | |
|
1777 | 0 | sreloc = NULL; |
1778 | 0 | symtab_hdr = &elf_symtab_hdr (abfd); |
1779 | 0 | sym_hashes = alpha_elf_sym_hashes (abfd); |
1780 | |
|
1781 | 0 | relend = relocs + sec->reloc_count; |
1782 | 0 | for (rel = relocs; rel < relend; ++rel) |
1783 | 0 | { |
1784 | 0 | enum { |
1785 | 0 | NEED_GOT = 1, |
1786 | 0 | NEED_GOT_ENTRY = 2, |
1787 | 0 | NEED_DYNREL = 4 |
1788 | 0 | }; |
1789 | |
|
1790 | 0 | unsigned long r_symndx, r_type; |
1791 | 0 | struct alpha_elf_link_hash_entry *h; |
1792 | 0 | unsigned int gotent_flags; |
1793 | 0 | bool maybe_dynamic; |
1794 | 0 | unsigned int need; |
1795 | 0 | bfd_vma addend; |
1796 | |
|
1797 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
1798 | 0 | if (r_symndx < symtab_hdr->sh_info) |
1799 | 0 | h = NULL; |
1800 | 0 | else |
1801 | 0 | { |
1802 | 0 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1803 | |
|
1804 | 0 | while (h->root.root.type == bfd_link_hash_indirect |
1805 | 0 | || h->root.root.type == bfd_link_hash_warning) |
1806 | 0 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
1807 | | |
1808 | | /* PR15323, ref flags aren't set for references in the same |
1809 | | object. */ |
1810 | 0 | h->root.ref_regular = 1; |
1811 | 0 | } |
1812 | | |
1813 | | /* We can only get preliminary data on whether a symbol is |
1814 | | locally or externally defined, as not all of the input files |
1815 | | have yet been processed. Do something with what we know, as |
1816 | | this may help reduce memory usage and processing time later. */ |
1817 | 0 | maybe_dynamic = false; |
1818 | 0 | if (h && ((bfd_link_pic (info) |
1819 | 0 | && (!info->symbolic |
1820 | 0 | || info->unresolved_syms_in_shared_libs == RM_IGNORE)) |
1821 | 0 | || !h->root.def_regular |
1822 | 0 | || h->root.root.type == bfd_link_hash_defweak)) |
1823 | 0 | maybe_dynamic = true; |
1824 | |
|
1825 | 0 | need = 0; |
1826 | 0 | gotent_flags = 0; |
1827 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
1828 | 0 | addend = rel->r_addend; |
1829 | |
|
1830 | 0 | switch (r_type) |
1831 | 0 | { |
1832 | 0 | case R_ALPHA_LITERAL: |
1833 | 0 | need = NEED_GOT | NEED_GOT_ENTRY; |
1834 | | |
1835 | | /* Remember how this literal is used from its LITUSEs. |
1836 | | This will be important when it comes to decide if we can |
1837 | | create a .plt entry for a function symbol. */ |
1838 | 0 | while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE) |
1839 | 0 | if (rel->r_addend >= 1 && rel->r_addend <= 6) |
1840 | 0 | gotent_flags |= 1 << rel->r_addend; |
1841 | 0 | --rel; |
1842 | | |
1843 | | /* No LITUSEs -- presumably the address is used somehow. */ |
1844 | 0 | if (gotent_flags == 0) |
1845 | 0 | gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR; |
1846 | 0 | break; |
1847 | | |
1848 | 0 | case R_ALPHA_GPDISP: |
1849 | 0 | case R_ALPHA_GPREL16: |
1850 | 0 | case R_ALPHA_GPREL32: |
1851 | 0 | case R_ALPHA_GPRELHIGH: |
1852 | 0 | case R_ALPHA_GPRELLOW: |
1853 | 0 | case R_ALPHA_BRSGP: |
1854 | 0 | need = NEED_GOT; |
1855 | 0 | break; |
1856 | | |
1857 | 0 | case R_ALPHA_REFLONG: |
1858 | 0 | case R_ALPHA_REFQUAD: |
1859 | 0 | if (bfd_link_pic (info) || maybe_dynamic) |
1860 | 0 | need = NEED_DYNREL; |
1861 | 0 | break; |
1862 | | |
1863 | 0 | case R_ALPHA_TLSLDM: |
1864 | | /* The symbol for a TLSLDM reloc is ignored. Collapse the |
1865 | | reloc to the STN_UNDEF (0) symbol so that they all match. */ |
1866 | 0 | r_symndx = STN_UNDEF; |
1867 | 0 | h = 0; |
1868 | 0 | maybe_dynamic = false; |
1869 | | /* FALLTHRU */ |
1870 | |
|
1871 | 0 | case R_ALPHA_TLSGD: |
1872 | 0 | case R_ALPHA_GOTDTPREL: |
1873 | 0 | need = NEED_GOT | NEED_GOT_ENTRY; |
1874 | 0 | break; |
1875 | | |
1876 | 0 | case R_ALPHA_GOTTPREL: |
1877 | 0 | need = NEED_GOT | NEED_GOT_ENTRY; |
1878 | 0 | gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE; |
1879 | 0 | if (bfd_link_pic (info)) |
1880 | 0 | info->flags |= DF_STATIC_TLS; |
1881 | 0 | break; |
1882 | | |
1883 | 0 | case R_ALPHA_TPREL64: |
1884 | 0 | if (bfd_link_dll (info)) |
1885 | 0 | { |
1886 | 0 | info->flags |= DF_STATIC_TLS; |
1887 | 0 | need = NEED_DYNREL; |
1888 | 0 | } |
1889 | 0 | else if (maybe_dynamic) |
1890 | 0 | need = NEED_DYNREL; |
1891 | 0 | break; |
1892 | 0 | } |
1893 | | |
1894 | 0 | if (need & NEED_GOT) |
1895 | 0 | { |
1896 | 0 | if (alpha_elf_tdata(abfd)->gotobj == NULL) |
1897 | 0 | { |
1898 | 0 | if (!elf64_alpha_create_got_section (abfd, info)) |
1899 | 0 | return false; |
1900 | 0 | } |
1901 | 0 | } |
1902 | | |
1903 | 0 | if (need & NEED_GOT_ENTRY) |
1904 | 0 | { |
1905 | 0 | struct alpha_elf_got_entry *gotent; |
1906 | |
|
1907 | 0 | gotent = get_got_entry (abfd, h, r_type, r_symndx, addend); |
1908 | 0 | if (!gotent) |
1909 | 0 | return false; |
1910 | | |
1911 | 0 | if (gotent_flags) |
1912 | 0 | { |
1913 | 0 | gotent->flags |= gotent_flags; |
1914 | 0 | if (h) |
1915 | 0 | { |
1916 | 0 | gotent_flags |= h->flags; |
1917 | 0 | h->flags = gotent_flags; |
1918 | | |
1919 | | /* Make a guess as to whether a .plt entry is needed. */ |
1920 | | /* ??? It appears that we won't make it into |
1921 | | adjust_dynamic_symbol for symbols that remain |
1922 | | totally undefined. Copying this check here means |
1923 | | we can create a plt entry for them too. */ |
1924 | 0 | h->root.needs_plt |
1925 | 0 | = (maybe_dynamic && elf64_alpha_want_plt (h)); |
1926 | 0 | } |
1927 | 0 | } |
1928 | 0 | } |
1929 | | |
1930 | 0 | if (need & NEED_DYNREL) |
1931 | 0 | { |
1932 | | /* We need to create the section here now whether we eventually |
1933 | | use it or not so that it gets mapped to an output section by |
1934 | | the linker. If not used, we'll kill it in size_dynamic_sections. */ |
1935 | 0 | if (sreloc == NULL) |
1936 | 0 | { |
1937 | 0 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1938 | 0 | (sec, dynobj, 3, abfd, /*rela?*/ true); |
1939 | |
|
1940 | 0 | if (sreloc == NULL) |
1941 | 0 | return false; |
1942 | 0 | } |
1943 | | |
1944 | 0 | if (h) |
1945 | 0 | { |
1946 | | /* Since we havn't seen all of the input symbols yet, we |
1947 | | don't know whether we'll actually need a dynamic relocation |
1948 | | entry for this reloc. So make a record of it. Once we |
1949 | | find out if this thing needs dynamic relocation we'll |
1950 | | expand the relocation sections by the appropriate amount. */ |
1951 | |
|
1952 | 0 | struct alpha_elf_reloc_entry *rent; |
1953 | |
|
1954 | 0 | for (rent = h->reloc_entries; rent; rent = rent->next) |
1955 | 0 | if (rent->rtype == r_type && rent->srel == sreloc) |
1956 | 0 | break; |
1957 | |
|
1958 | 0 | if (!rent) |
1959 | 0 | { |
1960 | 0 | size_t amt = sizeof (struct alpha_elf_reloc_entry); |
1961 | 0 | rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt); |
1962 | 0 | if (!rent) |
1963 | 0 | return false; |
1964 | | |
1965 | 0 | rent->srel = sreloc; |
1966 | 0 | rent->sec = sec; |
1967 | 0 | rent->rtype = r_type; |
1968 | 0 | rent->count = 1; |
1969 | |
|
1970 | 0 | rent->next = h->reloc_entries; |
1971 | 0 | h->reloc_entries = rent; |
1972 | 0 | } |
1973 | 0 | else |
1974 | 0 | rent->count++; |
1975 | 0 | } |
1976 | 0 | else if (bfd_link_pic (info)) |
1977 | 0 | { |
1978 | | /* If this is a shared library, and the section is to be |
1979 | | loaded into memory, we need a RELATIVE reloc. */ |
1980 | 0 | sreloc->size += sizeof (Elf64_External_Rela); |
1981 | 0 | if (sec->flags & SEC_READONLY) |
1982 | 0 | { |
1983 | 0 | info->flags |= DF_TEXTREL; |
1984 | 0 | info->callbacks->minfo |
1985 | 0 | (_("%pB: dynamic relocation against `%pT' in " |
1986 | 0 | "read-only section `%pA'\n"), |
1987 | 0 | sec->owner, h->root.root.root.string, sec); |
1988 | 0 | } |
1989 | 0 | } |
1990 | 0 | } |
1991 | 0 | } |
1992 | | |
1993 | 0 | return true; |
1994 | 0 | } |
1995 | | |
1996 | | /* Return the section that should be marked against GC for a given |
1997 | | relocation. */ |
1998 | | |
1999 | | static asection * |
2000 | | elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info, |
2001 | | Elf_Internal_Rela *rel, |
2002 | | struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) |
2003 | 0 | { |
2004 | | /* These relocations don't really reference a symbol. Instead we store |
2005 | | extra data in their addend slot. Ignore the symbol. */ |
2006 | 0 | switch (ELF64_R_TYPE (rel->r_info)) |
2007 | 0 | { |
2008 | 0 | case R_ALPHA_LITUSE: |
2009 | 0 | case R_ALPHA_GPDISP: |
2010 | 0 | case R_ALPHA_HINT: |
2011 | 0 | return NULL; |
2012 | 0 | } |
2013 | | |
2014 | 0 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
2015 | 0 | } |
2016 | | |
2017 | | /* Adjust a symbol defined by a dynamic object and referenced by a |
2018 | | regular object. The current definition is in some section of the |
2019 | | dynamic object, but we're not including those sections. We have to |
2020 | | change the definition to something the rest of the link can |
2021 | | understand. */ |
2022 | | |
2023 | | static bool |
2024 | | elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info, |
2025 | | struct elf_link_hash_entry *h) |
2026 | 0 | { |
2027 | 0 | bfd *dynobj; |
2028 | 0 | asection *s; |
2029 | 0 | struct alpha_elf_link_hash_entry *ah; |
2030 | |
|
2031 | 0 | dynobj = elf_hash_table(info)->dynobj; |
2032 | 0 | ah = (struct alpha_elf_link_hash_entry *)h; |
2033 | | |
2034 | | /* Now that we've seen all of the input symbols, finalize our decision |
2035 | | about whether this symbol should get a .plt entry. Irritatingly, it |
2036 | | is common for folk to leave undefined symbols in shared libraries, |
2037 | | and they still expect lazy binding; accept undefined symbols in lieu |
2038 | | of STT_FUNC. */ |
2039 | 0 | if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah)) |
2040 | 0 | { |
2041 | 0 | h->needs_plt = true; |
2042 | |
|
2043 | 0 | s = elf_hash_table(info)->splt; |
2044 | 0 | if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) |
2045 | 0 | return false; |
2046 | | |
2047 | | /* We need one plt entry per got subsection. Delay allocation of |
2048 | | the actual plt entries until size_plt_section, called from |
2049 | | size_dynamic_sections or during relaxation. */ |
2050 | | |
2051 | 0 | return true; |
2052 | 0 | } |
2053 | 0 | else |
2054 | 0 | h->needs_plt = false; |
2055 | | |
2056 | | /* If this is a weak symbol, and there is a real definition, the |
2057 | | processor independent code will have arranged for us to see the |
2058 | | real definition first, and we can just use the same value. */ |
2059 | 0 | if (h->is_weakalias) |
2060 | 0 | { |
2061 | 0 | struct elf_link_hash_entry *def = weakdef (h); |
2062 | 0 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
2063 | 0 | h->root.u.def.section = def->root.u.def.section; |
2064 | 0 | h->root.u.def.value = def->root.u.def.value; |
2065 | 0 | return true; |
2066 | 0 | } |
2067 | | |
2068 | | /* This is a reference to a symbol defined by a dynamic object which |
2069 | | is not a function. The Alpha, since it uses .got entries for all |
2070 | | symbols even in regular objects, does not need the hackery of a |
2071 | | .dynbss section and COPY dynamic relocations. */ |
2072 | | |
2073 | 0 | return true; |
2074 | 0 | } |
2075 | | |
2076 | | /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */ |
2077 | | |
2078 | | static void |
2079 | | elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h, |
2080 | | unsigned int st_other, |
2081 | | bool definition, |
2082 | | bool dynamic) |
2083 | 0 | { |
2084 | 0 | if (!dynamic && definition) |
2085 | 0 | h->other = ((h->other & ELF_ST_VISIBILITY (-1)) |
2086 | 0 | | (st_other & ~ELF_ST_VISIBILITY (-1))); |
2087 | 0 | } |
2088 | | |
2089 | | /* Symbol versioning can create new symbols, and make our old symbols |
2090 | | indirect to the new ones. Consolidate the got and reloc information |
2091 | | in these situations. */ |
2092 | | |
2093 | | static void |
2094 | | elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info, |
2095 | | struct elf_link_hash_entry *dir, |
2096 | | struct elf_link_hash_entry *ind) |
2097 | 0 | { |
2098 | 0 | struct alpha_elf_link_hash_entry *hi |
2099 | 0 | = (struct alpha_elf_link_hash_entry *) ind; |
2100 | 0 | struct alpha_elf_link_hash_entry *hs |
2101 | 0 | = (struct alpha_elf_link_hash_entry *) dir; |
2102 | | |
2103 | | /* Do the merging in the superclass. */ |
2104 | 0 | _bfd_elf_link_hash_copy_indirect(info, dir, ind); |
2105 | | |
2106 | | /* Merge the flags. Whee. */ |
2107 | 0 | hs->flags |= hi->flags; |
2108 | | |
2109 | | /* ??? It's unclear to me what's really supposed to happen when |
2110 | | "merging" defweak and defined symbols, given that we don't |
2111 | | actually throw away the defweak. This more-or-less copies |
2112 | | the logic related to got and plt entries in the superclass. */ |
2113 | 0 | if (ind->root.type != bfd_link_hash_indirect) |
2114 | 0 | return; |
2115 | | |
2116 | | /* Merge the .got entries. Cannibalize the old symbol's list in |
2117 | | doing so, since we don't need it anymore. */ |
2118 | | |
2119 | 0 | if (hs->got_entries == NULL) |
2120 | 0 | hs->got_entries = hi->got_entries; |
2121 | 0 | else |
2122 | 0 | { |
2123 | 0 | struct alpha_elf_got_entry *gi, *gs, *gin, *gsh; |
2124 | |
|
2125 | 0 | gsh = hs->got_entries; |
2126 | 0 | for (gi = hi->got_entries; gi ; gi = gin) |
2127 | 0 | { |
2128 | 0 | gin = gi->next; |
2129 | 0 | for (gs = gsh; gs ; gs = gs->next) |
2130 | 0 | if (gi->gotobj == gs->gotobj |
2131 | 0 | && gi->reloc_type == gs->reloc_type |
2132 | 0 | && gi->addend == gs->addend) |
2133 | 0 | { |
2134 | 0 | gs->use_count += gi->use_count; |
2135 | 0 | goto got_found; |
2136 | 0 | } |
2137 | 0 | gi->next = hs->got_entries; |
2138 | 0 | hs->got_entries = gi; |
2139 | 0 | got_found:; |
2140 | 0 | } |
2141 | 0 | } |
2142 | 0 | hi->got_entries = NULL; |
2143 | | |
2144 | | /* And similar for the reloc entries. */ |
2145 | |
|
2146 | 0 | if (hs->reloc_entries == NULL) |
2147 | 0 | hs->reloc_entries = hi->reloc_entries; |
2148 | 0 | else |
2149 | 0 | { |
2150 | 0 | struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh; |
2151 | |
|
2152 | 0 | rsh = hs->reloc_entries; |
2153 | 0 | for (ri = hi->reloc_entries; ri ; ri = rin) |
2154 | 0 | { |
2155 | 0 | rin = ri->next; |
2156 | 0 | for (rs = rsh; rs ; rs = rs->next) |
2157 | 0 | if (ri->rtype == rs->rtype && ri->srel == rs->srel) |
2158 | 0 | { |
2159 | 0 | rs->count += ri->count; |
2160 | 0 | goto found_reloc; |
2161 | 0 | } |
2162 | 0 | ri->next = hs->reloc_entries; |
2163 | 0 | hs->reloc_entries = ri; |
2164 | 0 | found_reloc:; |
2165 | 0 | } |
2166 | 0 | } |
2167 | 0 | hi->reloc_entries = NULL; |
2168 | 0 | } |
2169 | | |
2170 | | /* Is it possible to merge two object file's .got tables? */ |
2171 | | |
2172 | | static bool |
2173 | | elf64_alpha_can_merge_gots (bfd *a, bfd *b) |
2174 | 0 | { |
2175 | 0 | int total = alpha_elf_tdata (a)->total_got_size; |
2176 | 0 | bfd *bsub; |
2177 | | |
2178 | | /* Trivial quick fallout test. */ |
2179 | 0 | if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE) |
2180 | 0 | return true; |
2181 | | |
2182 | | /* By their nature, local .got entries cannot be merged. */ |
2183 | 0 | if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE) |
2184 | 0 | return false; |
2185 | | |
2186 | | /* Failing the common trivial comparison, we must effectively |
2187 | | perform the merge. Not actually performing the merge means that |
2188 | | we don't have to store undo information in case we fail. */ |
2189 | 0 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) |
2190 | 0 | { |
2191 | 0 | struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub); |
2192 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr; |
2193 | 0 | int i, n; |
2194 | |
|
2195 | 0 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; |
2196 | 0 | for (i = 0; i < n; ++i) |
2197 | 0 | { |
2198 | 0 | struct alpha_elf_got_entry *ae, *be; |
2199 | 0 | struct alpha_elf_link_hash_entry *h; |
2200 | |
|
2201 | 0 | h = hashes[i]; |
2202 | 0 | while (h->root.root.type == bfd_link_hash_indirect |
2203 | 0 | || h->root.root.type == bfd_link_hash_warning) |
2204 | 0 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
2205 | |
|
2206 | 0 | for (be = h->got_entries; be ; be = be->next) |
2207 | 0 | { |
2208 | 0 | if (be->use_count == 0) |
2209 | 0 | continue; |
2210 | 0 | if (be->gotobj != b) |
2211 | 0 | continue; |
2212 | | |
2213 | 0 | for (ae = h->got_entries; ae ; ae = ae->next) |
2214 | 0 | if (ae->gotobj == a |
2215 | 0 | && ae->reloc_type == be->reloc_type |
2216 | 0 | && ae->addend == be->addend) |
2217 | 0 | goto global_found; |
2218 | | |
2219 | 0 | total += alpha_got_entry_size (be->reloc_type); |
2220 | 0 | if (total > MAX_GOT_SIZE) |
2221 | 0 | return false; |
2222 | 0 | global_found:; |
2223 | 0 | } |
2224 | 0 | } |
2225 | 0 | } |
2226 | | |
2227 | 0 | return true; |
2228 | 0 | } |
2229 | | |
2230 | | /* Actually merge two .got tables. */ |
2231 | | |
2232 | | static void |
2233 | | elf64_alpha_merge_gots (bfd *a, bfd *b) |
2234 | 0 | { |
2235 | 0 | int total = alpha_elf_tdata (a)->total_got_size; |
2236 | 0 | bfd *bsub; |
2237 | | |
2238 | | /* Remember local expansion. */ |
2239 | 0 | { |
2240 | 0 | int e = alpha_elf_tdata (b)->local_got_size; |
2241 | 0 | total += e; |
2242 | 0 | alpha_elf_tdata (a)->local_got_size += e; |
2243 | 0 | } |
2244 | |
|
2245 | 0 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) |
2246 | 0 | { |
2247 | 0 | struct alpha_elf_got_entry **local_got_entries; |
2248 | 0 | struct alpha_elf_link_hash_entry **hashes; |
2249 | 0 | Elf_Internal_Shdr *symtab_hdr; |
2250 | 0 | int i, n; |
2251 | | |
2252 | | /* Let the local .got entries know they are part of a new subsegment. */ |
2253 | 0 | local_got_entries = alpha_elf_tdata (bsub)->local_got_entries; |
2254 | 0 | if (local_got_entries) |
2255 | 0 | { |
2256 | 0 | n = elf_tdata (bsub)->symtab_hdr.sh_info; |
2257 | 0 | for (i = 0; i < n; ++i) |
2258 | 0 | { |
2259 | 0 | struct alpha_elf_got_entry *ent; |
2260 | 0 | for (ent = local_got_entries[i]; ent; ent = ent->next) |
2261 | 0 | ent->gotobj = a; |
2262 | 0 | } |
2263 | 0 | } |
2264 | | |
2265 | | /* Merge the global .got entries. */ |
2266 | 0 | hashes = alpha_elf_sym_hashes (bsub); |
2267 | 0 | symtab_hdr = &elf_tdata (bsub)->symtab_hdr; |
2268 | |
|
2269 | 0 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; |
2270 | 0 | for (i = 0; i < n; ++i) |
2271 | 0 | { |
2272 | 0 | struct alpha_elf_got_entry *ae, *be, **pbe, **start; |
2273 | 0 | struct alpha_elf_link_hash_entry *h; |
2274 | |
|
2275 | 0 | h = hashes[i]; |
2276 | 0 | while (h->root.root.type == bfd_link_hash_indirect |
2277 | 0 | || h->root.root.type == bfd_link_hash_warning) |
2278 | 0 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
2279 | |
|
2280 | 0 | pbe = start = &h->got_entries; |
2281 | 0 | while ((be = *pbe) != NULL) |
2282 | 0 | { |
2283 | 0 | if (be->use_count == 0) |
2284 | 0 | { |
2285 | 0 | *pbe = be->next; |
2286 | 0 | memset (be, 0xa5, sizeof (*be)); |
2287 | 0 | goto kill; |
2288 | 0 | } |
2289 | 0 | if (be->gotobj != b) |
2290 | 0 | goto next; |
2291 | | |
2292 | 0 | for (ae = *start; ae ; ae = ae->next) |
2293 | 0 | if (ae->gotobj == a |
2294 | 0 | && ae->reloc_type == be->reloc_type |
2295 | 0 | && ae->addend == be->addend) |
2296 | 0 | { |
2297 | 0 | ae->flags |= be->flags; |
2298 | 0 | ae->use_count += be->use_count; |
2299 | 0 | *pbe = be->next; |
2300 | 0 | memset (be, 0xa5, sizeof (*be)); |
2301 | 0 | goto kill; |
2302 | 0 | } |
2303 | 0 | be->gotobj = a; |
2304 | 0 | total += alpha_got_entry_size (be->reloc_type); |
2305 | |
|
2306 | 0 | next:; |
2307 | 0 | pbe = &be->next; |
2308 | 0 | kill:; |
2309 | 0 | } |
2310 | 0 | } |
2311 | | |
2312 | 0 | alpha_elf_tdata (bsub)->gotobj = a; |
2313 | 0 | } |
2314 | 0 | alpha_elf_tdata (a)->total_got_size = total; |
2315 | | |
2316 | | /* Merge the two in_got chains. */ |
2317 | 0 | { |
2318 | 0 | bfd *next; |
2319 | |
|
2320 | 0 | bsub = a; |
2321 | 0 | while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL) |
2322 | 0 | bsub = next; |
2323 | |
|
2324 | 0 | alpha_elf_tdata (bsub)->in_got_link_next = b; |
2325 | 0 | } |
2326 | 0 | } |
2327 | | |
2328 | | /* Calculate the offsets for the got entries. */ |
2329 | | |
2330 | | static bool |
2331 | | elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h, |
2332 | | void * arg ATTRIBUTE_UNUSED) |
2333 | 0 | { |
2334 | 0 | struct alpha_elf_got_entry *gotent; |
2335 | |
|
2336 | 0 | for (gotent = h->got_entries; gotent; gotent = gotent->next) |
2337 | 0 | if (gotent->use_count > 0) |
2338 | 0 | { |
2339 | 0 | struct alpha_elf_obj_tdata *td; |
2340 | 0 | bfd_size_type *plge; |
2341 | |
|
2342 | 0 | td = alpha_elf_tdata (gotent->gotobj); |
2343 | 0 | plge = &td->got->size; |
2344 | 0 | gotent->got_offset = *plge; |
2345 | 0 | *plge += alpha_got_entry_size (gotent->reloc_type); |
2346 | 0 | } |
2347 | |
|
2348 | 0 | return true; |
2349 | 0 | } |
2350 | | |
2351 | | static void |
2352 | | elf64_alpha_calc_got_offsets (struct bfd_link_info *info) |
2353 | 0 | { |
2354 | 0 | bfd *i, *got_list; |
2355 | 0 | struct alpha_elf_link_hash_table * htab; |
2356 | |
|
2357 | 0 | htab = alpha_elf_hash_table (info); |
2358 | 0 | if (htab == NULL) |
2359 | 0 | return; |
2360 | 0 | got_list = htab->got_list; |
2361 | | |
2362 | | /* First, zero out the .got sizes, as we may be recalculating the |
2363 | | .got after optimizing it. */ |
2364 | 0 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) |
2365 | 0 | alpha_elf_tdata(i)->got->size = 0; |
2366 | | |
2367 | | /* Next, fill in the offsets for all the global entries. */ |
2368 | 0 | alpha_elf_link_hash_traverse (htab, |
2369 | 0 | elf64_alpha_calc_got_offsets_for_symbol, |
2370 | 0 | NULL); |
2371 | | |
2372 | | /* Finally, fill in the offsets for the local entries. */ |
2373 | 0 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) |
2374 | 0 | { |
2375 | 0 | bfd_size_type got_offset = alpha_elf_tdata(i)->got->size; |
2376 | 0 | bfd *j; |
2377 | |
|
2378 | 0 | for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) |
2379 | 0 | { |
2380 | 0 | struct alpha_elf_got_entry **local_got_entries, *gotent; |
2381 | 0 | int k, n; |
2382 | |
|
2383 | 0 | local_got_entries = alpha_elf_tdata(j)->local_got_entries; |
2384 | 0 | if (!local_got_entries) |
2385 | 0 | continue; |
2386 | | |
2387 | 0 | for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) |
2388 | 0 | for (gotent = local_got_entries[k]; gotent; gotent = gotent->next) |
2389 | 0 | if (gotent->use_count > 0) |
2390 | 0 | { |
2391 | 0 | gotent->got_offset = got_offset; |
2392 | 0 | got_offset += alpha_got_entry_size (gotent->reloc_type); |
2393 | 0 | } |
2394 | 0 | } |
2395 | |
|
2396 | 0 | alpha_elf_tdata(i)->got->size = got_offset; |
2397 | 0 | } |
2398 | 0 | } |
2399 | | |
2400 | | /* Constructs the gots. */ |
2401 | | |
2402 | | static bool |
2403 | | elf64_alpha_size_got_sections (struct bfd_link_info *info, |
2404 | | bool may_merge) |
2405 | 0 | { |
2406 | 0 | bfd *i, *got_list, *cur_got_obj = NULL; |
2407 | 0 | struct alpha_elf_link_hash_table * htab; |
2408 | |
|
2409 | 0 | htab = alpha_elf_hash_table (info); |
2410 | 0 | if (htab == NULL) |
2411 | 0 | return false; |
2412 | 0 | got_list = htab->got_list; |
2413 | | |
2414 | | /* On the first time through, pretend we have an existing got list |
2415 | | consisting of all of the input files. */ |
2416 | 0 | if (got_list == NULL) |
2417 | 0 | { |
2418 | 0 | for (i = info->input_bfds; i ; i = i->link.next) |
2419 | 0 | { |
2420 | 0 | bfd *this_got; |
2421 | |
|
2422 | 0 | if (! is_alpha_elf (i)) |
2423 | 0 | continue; |
2424 | | |
2425 | 0 | this_got = alpha_elf_tdata (i)->gotobj; |
2426 | 0 | if (this_got == NULL) |
2427 | 0 | continue; |
2428 | | |
2429 | | /* We are assuming no merging has yet occurred. */ |
2430 | 0 | BFD_ASSERT (this_got == i); |
2431 | |
|
2432 | 0 | if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE) |
2433 | 0 | { |
2434 | | /* Yikes! A single object file has too many entries. */ |
2435 | 0 | _bfd_error_handler |
2436 | | /* xgettext:c-format */ |
2437 | 0 | (_("%pB: .got subsegment exceeds 64K (size %d)"), |
2438 | 0 | i, alpha_elf_tdata (this_got)->total_got_size); |
2439 | 0 | return false; |
2440 | 0 | } |
2441 | | |
2442 | 0 | if (got_list == NULL) |
2443 | 0 | got_list = this_got; |
2444 | 0 | else |
2445 | 0 | alpha_elf_tdata(cur_got_obj)->got_link_next = this_got; |
2446 | 0 | cur_got_obj = this_got; |
2447 | 0 | } |
2448 | | |
2449 | | /* Strange degenerate case of no got references. */ |
2450 | 0 | if (got_list == NULL) |
2451 | 0 | return true; |
2452 | | |
2453 | 0 | htab->got_list = got_list; |
2454 | 0 | } |
2455 | | |
2456 | 0 | cur_got_obj = got_list; |
2457 | 0 | if (cur_got_obj == NULL) |
2458 | 0 | return false; |
2459 | | |
2460 | 0 | if (may_merge) |
2461 | 0 | { |
2462 | 0 | i = alpha_elf_tdata(cur_got_obj)->got_link_next; |
2463 | 0 | while (i != NULL) |
2464 | 0 | { |
2465 | 0 | if (elf64_alpha_can_merge_gots (cur_got_obj, i)) |
2466 | 0 | { |
2467 | 0 | elf64_alpha_merge_gots (cur_got_obj, i); |
2468 | |
|
2469 | 0 | alpha_elf_tdata(i)->got->size = 0; |
2470 | 0 | i = alpha_elf_tdata(i)->got_link_next; |
2471 | 0 | alpha_elf_tdata(cur_got_obj)->got_link_next = i; |
2472 | 0 | } |
2473 | 0 | else |
2474 | 0 | { |
2475 | 0 | cur_got_obj = i; |
2476 | 0 | i = alpha_elf_tdata(i)->got_link_next; |
2477 | 0 | } |
2478 | 0 | } |
2479 | 0 | } |
2480 | | |
2481 | | /* Once the gots have been merged, fill in the got offsets for |
2482 | | everything therein. */ |
2483 | 0 | elf64_alpha_calc_got_offsets (info); |
2484 | |
|
2485 | 0 | return true; |
2486 | 0 | } |
2487 | | |
2488 | | static bool |
2489 | | elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, |
2490 | | void * data) |
2491 | 0 | { |
2492 | 0 | asection *splt = (asection *) data; |
2493 | 0 | struct alpha_elf_got_entry *gotent; |
2494 | 0 | bool saw_one = false; |
2495 | | |
2496 | | /* If we didn't need an entry before, we still don't. */ |
2497 | 0 | if (!h->root.needs_plt) |
2498 | 0 | return true; |
2499 | | |
2500 | | /* For each LITERAL got entry still in use, allocate a plt entry. */ |
2501 | 0 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) |
2502 | 0 | if (gotent->reloc_type == R_ALPHA_LITERAL |
2503 | 0 | && gotent->use_count > 0) |
2504 | 0 | { |
2505 | 0 | if (splt->size == 0) |
2506 | 0 | splt->size = PLT_HEADER_SIZE; |
2507 | 0 | gotent->plt_offset = splt->size; |
2508 | 0 | splt->size += PLT_ENTRY_SIZE; |
2509 | 0 | saw_one = true; |
2510 | 0 | } |
2511 | | |
2512 | | /* If there weren't any, there's no longer a need for the PLT entry. */ |
2513 | 0 | if (!saw_one) |
2514 | 0 | h->root.needs_plt = false; |
2515 | |
|
2516 | 0 | return true; |
2517 | 0 | } |
2518 | | |
2519 | | /* Called from relax_section to rebuild the PLT in light of potential changes |
2520 | | in the function's status. */ |
2521 | | |
2522 | | static void |
2523 | | elf64_alpha_size_plt_section (struct bfd_link_info *info) |
2524 | 0 | { |
2525 | 0 | asection *splt, *spltrel, *sgotplt; |
2526 | 0 | unsigned long entries; |
2527 | 0 | struct alpha_elf_link_hash_table * htab; |
2528 | |
|
2529 | 0 | htab = alpha_elf_hash_table (info); |
2530 | 0 | if (htab == NULL) |
2531 | 0 | return; |
2532 | | |
2533 | 0 | splt = elf_hash_table(info)->splt; |
2534 | 0 | if (splt == NULL) |
2535 | 0 | return; |
2536 | | |
2537 | 0 | splt->size = 0; |
2538 | |
|
2539 | 0 | alpha_elf_link_hash_traverse (htab, |
2540 | 0 | elf64_alpha_size_plt_section_1, splt); |
2541 | | |
2542 | | /* Every plt entry requires a JMP_SLOT relocation. */ |
2543 | 0 | spltrel = elf_hash_table(info)->srelplt; |
2544 | 0 | entries = 0; |
2545 | 0 | if (splt->size) |
2546 | 0 | { |
2547 | 0 | if (elf64_alpha_use_secureplt) |
2548 | 0 | entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE; |
2549 | 0 | else |
2550 | 0 | entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE; |
2551 | 0 | } |
2552 | 0 | spltrel->size = entries * sizeof (Elf64_External_Rela); |
2553 | | |
2554 | | /* When using the secureplt, we need two words somewhere in the data |
2555 | | segment for the dynamic linker to tell us where to go. This is the |
2556 | | entire contents of the .got.plt section. */ |
2557 | 0 | if (elf64_alpha_use_secureplt) |
2558 | 0 | { |
2559 | 0 | sgotplt = elf_hash_table(info)->sgotplt; |
2560 | 0 | sgotplt->size = entries ? 16 : 0; |
2561 | 0 | } |
2562 | 0 | } |
2563 | | |
2564 | | static bool |
2565 | | elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
2566 | | struct bfd_link_info *info) |
2567 | 0 | { |
2568 | 0 | bfd *i; |
2569 | 0 | struct alpha_elf_link_hash_table * htab; |
2570 | |
|
2571 | 0 | if (bfd_link_relocatable (info)) |
2572 | 0 | return true; |
2573 | | |
2574 | 0 | htab = alpha_elf_hash_table (info); |
2575 | 0 | if (htab == NULL) |
2576 | 0 | return false; |
2577 | | |
2578 | 0 | if (!elf64_alpha_size_got_sections (info, true)) |
2579 | 0 | return false; |
2580 | | |
2581 | | /* Allocate space for all of the .got subsections. */ |
2582 | 0 | i = htab->got_list; |
2583 | 0 | for ( ; i ; i = alpha_elf_tdata(i)->got_link_next) |
2584 | 0 | { |
2585 | 0 | asection *s = alpha_elf_tdata(i)->got; |
2586 | 0 | if (s->size > 0) |
2587 | 0 | { |
2588 | 0 | s->contents = (bfd_byte *) bfd_zalloc (i, s->size); |
2589 | 0 | if (s->contents == NULL) |
2590 | 0 | return false; |
2591 | 0 | } |
2592 | 0 | } |
2593 | | |
2594 | 0 | return true; |
2595 | 0 | } |
2596 | | |
2597 | | /* The number of dynamic relocations required by a static relocation. */ |
2598 | | |
2599 | | static int |
2600 | | alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared, int pie) |
2601 | 0 | { |
2602 | 0 | switch (r_type) |
2603 | 0 | { |
2604 | | /* May appear in GOT entries. */ |
2605 | 0 | case R_ALPHA_TLSGD: |
2606 | 0 | return (dynamic ? 2 : shared ? 1 : 0); |
2607 | 0 | case R_ALPHA_TLSLDM: |
2608 | 0 | return shared; |
2609 | 0 | case R_ALPHA_LITERAL: |
2610 | 0 | return dynamic || shared; |
2611 | 0 | case R_ALPHA_GOTTPREL: |
2612 | 0 | return dynamic || (shared && !pie); |
2613 | 0 | case R_ALPHA_GOTDTPREL: |
2614 | 0 | return dynamic; |
2615 | | |
2616 | | /* May appear in data sections. */ |
2617 | 0 | case R_ALPHA_REFLONG: |
2618 | 0 | case R_ALPHA_REFQUAD: |
2619 | 0 | return dynamic || shared; |
2620 | 0 | case R_ALPHA_TPREL64: |
2621 | 0 | return dynamic || (shared && !pie); |
2622 | | |
2623 | | /* Everything else is illegal. We'll issue an error during |
2624 | | relocate_section. */ |
2625 | 0 | default: |
2626 | 0 | return 0; |
2627 | 0 | } |
2628 | 0 | } |
2629 | | |
2630 | | /* Work out the sizes of the dynamic relocation entries. */ |
2631 | | |
2632 | | static bool |
2633 | | elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h, |
2634 | | struct bfd_link_info *info) |
2635 | 0 | { |
2636 | 0 | bool dynamic; |
2637 | 0 | struct alpha_elf_reloc_entry *relent; |
2638 | 0 | unsigned long entries; |
2639 | | |
2640 | | /* If the symbol was defined as a common symbol in a regular object |
2641 | | file, and there was no definition in any dynamic object, then the |
2642 | | linker will have allocated space for the symbol in a common |
2643 | | section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been |
2644 | | set. This is done for dynamic symbols in |
2645 | | elf_adjust_dynamic_symbol but this is not done for non-dynamic |
2646 | | symbols, somehow. */ |
2647 | 0 | if (!h->root.def_regular |
2648 | 0 | && h->root.ref_regular |
2649 | 0 | && !h->root.def_dynamic |
2650 | 0 | && (h->root.root.type == bfd_link_hash_defined |
2651 | 0 | || h->root.root.type == bfd_link_hash_defweak) |
2652 | 0 | && !(h->root.root.u.def.section->owner->flags & DYNAMIC)) |
2653 | 0 | h->root.def_regular = 1; |
2654 | | |
2655 | | /* If the symbol is dynamic, we'll need all the relocations in their |
2656 | | natural form. If this is a shared object, and it has been forced |
2657 | | local, we'll need the same number of RELATIVE relocations. */ |
2658 | 0 | dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); |
2659 | | |
2660 | | /* If the symbol is a hidden undefined weak, then we never have any |
2661 | | relocations. Avoid the loop which may want to add RELATIVE relocs |
2662 | | based on bfd_link_pic (info). */ |
2663 | 0 | if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) |
2664 | 0 | return true; |
2665 | | |
2666 | 0 | for (relent = h->reloc_entries; relent; relent = relent->next) |
2667 | 0 | { |
2668 | 0 | entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic, |
2669 | 0 | bfd_link_pic (info), |
2670 | 0 | bfd_link_pie (info)); |
2671 | 0 | if (entries) |
2672 | 0 | { |
2673 | 0 | asection *sec = relent->sec; |
2674 | 0 | relent->srel->size += |
2675 | 0 | entries * sizeof (Elf64_External_Rela) * relent->count; |
2676 | 0 | if ((sec->flags & SEC_READONLY) != 0) |
2677 | 0 | { |
2678 | 0 | info->flags |= DT_TEXTREL; |
2679 | 0 | info->callbacks->minfo |
2680 | 0 | (_("%pB: dynamic relocation against `%pT' in " |
2681 | 0 | "read-only section `%pA'\n"), |
2682 | 0 | sec->owner, h->root.root.root.string, sec); |
2683 | 0 | } |
2684 | 0 | } |
2685 | 0 | } |
2686 | |
|
2687 | 0 | return true; |
2688 | 0 | } |
2689 | | |
2690 | | /* Subroutine of elf64_alpha_size_rela_got_section for doing the |
2691 | | global symbols. */ |
2692 | | |
2693 | | static bool |
2694 | | elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h, |
2695 | | struct bfd_link_info *info) |
2696 | 0 | { |
2697 | 0 | bool dynamic; |
2698 | 0 | struct alpha_elf_got_entry *gotent; |
2699 | 0 | unsigned long entries; |
2700 | | |
2701 | | /* If we're using a plt for this symbol, then all of its relocations |
2702 | | for its got entries go into .rela.plt. */ |
2703 | 0 | if (h->root.needs_plt) |
2704 | 0 | return true; |
2705 | | |
2706 | | /* If the symbol is dynamic, we'll need all the relocations in their |
2707 | | natural form. If this is a shared object, and it has been forced |
2708 | | local, we'll need the same number of RELATIVE relocations. */ |
2709 | 0 | dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); |
2710 | | |
2711 | | /* If the symbol is a hidden undefined weak, then we never have any |
2712 | | relocations. Avoid the loop which may want to add RELATIVE relocs |
2713 | | based on bfd_link_pic (info). */ |
2714 | 0 | if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) |
2715 | 0 | return true; |
2716 | | |
2717 | 0 | entries = 0; |
2718 | 0 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) |
2719 | 0 | if (gotent->use_count > 0) |
2720 | 0 | entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, dynamic, |
2721 | 0 | bfd_link_pic (info), |
2722 | 0 | bfd_link_pie (info)); |
2723 | |
|
2724 | 0 | if (entries > 0) |
2725 | 0 | { |
2726 | 0 | asection *srel = elf_hash_table(info)->srelgot; |
2727 | 0 | BFD_ASSERT (srel != NULL); |
2728 | 0 | srel->size += sizeof (Elf64_External_Rela) * entries; |
2729 | 0 | } |
2730 | |
|
2731 | 0 | return true; |
2732 | 0 | } |
2733 | | |
2734 | | /* Set the sizes of the dynamic relocation sections. */ |
2735 | | |
2736 | | static void |
2737 | | elf64_alpha_size_rela_got_section (struct bfd_link_info *info) |
2738 | 0 | { |
2739 | 0 | unsigned long entries; |
2740 | 0 | bfd *i; |
2741 | 0 | asection *srel; |
2742 | 0 | struct alpha_elf_link_hash_table * htab; |
2743 | |
|
2744 | 0 | htab = alpha_elf_hash_table (info); |
2745 | 0 | if (htab == NULL) |
2746 | 0 | return; |
2747 | | |
2748 | | /* Shared libraries often require RELATIVE relocs, and some relocs |
2749 | | require attention for the main application as well. */ |
2750 | | |
2751 | 0 | entries = 0; |
2752 | 0 | for (i = htab->got_list; |
2753 | 0 | i ; i = alpha_elf_tdata(i)->got_link_next) |
2754 | 0 | { |
2755 | 0 | bfd *j; |
2756 | |
|
2757 | 0 | for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) |
2758 | 0 | { |
2759 | 0 | struct alpha_elf_got_entry **local_got_entries, *gotent; |
2760 | 0 | int k, n; |
2761 | |
|
2762 | 0 | local_got_entries = alpha_elf_tdata(j)->local_got_entries; |
2763 | 0 | if (!local_got_entries) |
2764 | 0 | continue; |
2765 | | |
2766 | 0 | for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) |
2767 | 0 | for (gotent = local_got_entries[k]; |
2768 | 0 | gotent ; gotent = gotent->next) |
2769 | 0 | if (gotent->use_count > 0) |
2770 | 0 | entries += (alpha_dynamic_entries_for_reloc |
2771 | 0 | (gotent->reloc_type, 0, bfd_link_pic (info), |
2772 | 0 | bfd_link_pie (info))); |
2773 | 0 | } |
2774 | 0 | } |
2775 | |
|
2776 | 0 | srel = elf_hash_table(info)->srelgot; |
2777 | 0 | if (!srel) |
2778 | 0 | { |
2779 | 0 | BFD_ASSERT (entries == 0); |
2780 | 0 | return; |
2781 | 0 | } |
2782 | 0 | srel->size = sizeof (Elf64_External_Rela) * entries; |
2783 | | |
2784 | | /* Now do the non-local symbols. */ |
2785 | 0 | alpha_elf_link_hash_traverse (htab, |
2786 | 0 | elf64_alpha_size_rela_got_1, info); |
2787 | 0 | } |
2788 | | |
2789 | | /* Set the sizes of the dynamic sections. */ |
2790 | | |
2791 | | static bool |
2792 | | elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
2793 | | struct bfd_link_info *info) |
2794 | 0 | { |
2795 | 0 | bfd *dynobj; |
2796 | 0 | asection *s; |
2797 | 0 | bool relplt, relocs; |
2798 | 0 | struct alpha_elf_link_hash_table * htab; |
2799 | |
|
2800 | 0 | htab = alpha_elf_hash_table (info); |
2801 | 0 | if (htab == NULL) |
2802 | 0 | return false; |
2803 | | |
2804 | 0 | dynobj = elf_hash_table(info)->dynobj; |
2805 | 0 | BFD_ASSERT(dynobj != NULL); |
2806 | |
|
2807 | 0 | if (elf_hash_table (info)->dynamic_sections_created) |
2808 | 0 | { |
2809 | | /* Set the contents of the .interp section to the interpreter. */ |
2810 | 0 | if (bfd_link_executable (info) && !info->nointerp) |
2811 | 0 | { |
2812 | 0 | s = bfd_get_linker_section (dynobj, ".interp"); |
2813 | 0 | BFD_ASSERT (s != NULL); |
2814 | 0 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
2815 | 0 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2816 | 0 | } |
2817 | | |
2818 | | /* Now that we've seen all of the input files, we can decide which |
2819 | | symbols need dynamic relocation entries and which don't. We've |
2820 | | collected information in check_relocs that we can now apply to |
2821 | | size the dynamic relocation sections. */ |
2822 | 0 | alpha_elf_link_hash_traverse (htab, |
2823 | 0 | elf64_alpha_calc_dynrel_sizes, info); |
2824 | |
|
2825 | 0 | elf64_alpha_size_rela_got_section (info); |
2826 | 0 | elf64_alpha_size_plt_section (info); |
2827 | 0 | } |
2828 | | /* else we're not dynamic and by definition we don't need such things. */ |
2829 | | |
2830 | | /* The check_relocs and adjust_dynamic_symbol entry points have |
2831 | | determined the sizes of the various dynamic sections. Allocate |
2832 | | memory for them. */ |
2833 | 0 | relplt = false; |
2834 | 0 | relocs = false; |
2835 | 0 | for (s = dynobj->sections; s != NULL; s = s->next) |
2836 | 0 | { |
2837 | 0 | const char *name; |
2838 | |
|
2839 | 0 | if (!(s->flags & SEC_LINKER_CREATED)) |
2840 | 0 | continue; |
2841 | | |
2842 | | /* It's OK to base decisions on the section name, because none |
2843 | | of the dynobj section names depend upon the input files. */ |
2844 | 0 | name = bfd_section_name (s); |
2845 | |
|
2846 | 0 | if (startswith (name, ".rela")) |
2847 | 0 | { |
2848 | 0 | if (s->size != 0) |
2849 | 0 | { |
2850 | 0 | if (strcmp (name, ".rela.plt") == 0) |
2851 | 0 | relplt = true; |
2852 | 0 | else |
2853 | 0 | relocs = true; |
2854 | | |
2855 | | /* We use the reloc_count field as a counter if we need |
2856 | | to copy relocs into the output file. */ |
2857 | 0 | s->reloc_count = 0; |
2858 | 0 | } |
2859 | 0 | } |
2860 | 0 | else if (! startswith (name, ".got") |
2861 | 0 | && strcmp (name, ".plt") != 0 |
2862 | 0 | && strcmp (name, ".dynbss") != 0) |
2863 | 0 | { |
2864 | | /* It's not one of our dynamic sections, so don't allocate space. */ |
2865 | 0 | continue; |
2866 | 0 | } |
2867 | | |
2868 | 0 | if (s->size == 0) |
2869 | 0 | { |
2870 | | /* If we don't need this section, strip it from the output file. |
2871 | | This is to handle .rela.bss and .rela.plt. We must create it |
2872 | | in create_dynamic_sections, because it must be created before |
2873 | | the linker maps input sections to output sections. The |
2874 | | linker does that before adjust_dynamic_symbol is called, and |
2875 | | it is that function which decides whether anything needs to |
2876 | | go into these sections. */ |
2877 | 0 | if (!startswith (name, ".got")) |
2878 | 0 | s->flags |= SEC_EXCLUDE; |
2879 | 0 | } |
2880 | 0 | else if ((s->flags & SEC_HAS_CONTENTS) != 0) |
2881 | 0 | { |
2882 | | /* Allocate memory for the section contents. */ |
2883 | 0 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
2884 | 0 | if (s->contents == NULL) |
2885 | 0 | return false; |
2886 | 0 | } |
2887 | 0 | } |
2888 | | |
2889 | 0 | if (elf_hash_table (info)->dynamic_sections_created) |
2890 | 0 | { |
2891 | | /* Add some entries to the .dynamic section. We fill in the |
2892 | | values later, in elf64_alpha_finish_dynamic_sections, but we |
2893 | | must add the entries now so that we get the correct size for |
2894 | | the .dynamic section. The DT_DEBUG entry is filled in by the |
2895 | | dynamic linker and used by the debugger. */ |
2896 | 0 | #define add_dynamic_entry(TAG, VAL) \ |
2897 | 0 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
2898 | |
|
2899 | 0 | if (!_bfd_elf_add_dynamic_tags (output_bfd, info, |
2900 | 0 | relocs || relplt)) |
2901 | 0 | return false; |
2902 | | |
2903 | 0 | if (relplt |
2904 | 0 | && elf64_alpha_use_secureplt |
2905 | 0 | && !add_dynamic_entry (DT_ALPHA_PLTRO, 1)) |
2906 | 0 | return false; |
2907 | 0 | } |
2908 | 0 | #undef add_dynamic_entry |
2909 | | |
2910 | 0 | return true; |
2911 | 0 | } |
2912 | | |
2913 | | /* These functions do relaxation for Alpha ELF. |
2914 | | |
2915 | | Currently I'm only handling what I can do with existing compiler |
2916 | | and assembler support, which means no instructions are removed, |
2917 | | though some may be nopped. At this time GCC does not emit enough |
2918 | | information to do all of the relaxing that is possible. It will |
2919 | | take some not small amount of work for that to happen. |
2920 | | |
2921 | | There are a couple of interesting papers that I once read on this |
2922 | | subject, that I cannot find references to at the moment, that |
2923 | | related to Alpha in particular. They are by David Wall, then of |
2924 | | DEC WRL. */ |
2925 | | |
2926 | | struct alpha_relax_info |
2927 | | { |
2928 | | bfd *abfd; |
2929 | | asection *sec; |
2930 | | bfd_byte *contents; |
2931 | | Elf_Internal_Shdr *symtab_hdr; |
2932 | | Elf_Internal_Rela *relocs, *relend; |
2933 | | struct bfd_link_info *link_info; |
2934 | | bfd_vma gp; |
2935 | | bfd *gotobj; |
2936 | | asection *tsec; |
2937 | | struct alpha_elf_link_hash_entry *h; |
2938 | | struct alpha_elf_got_entry **first_gotent; |
2939 | | struct alpha_elf_got_entry *gotent; |
2940 | | bool changed_contents; |
2941 | | bool changed_relocs; |
2942 | | unsigned char other; |
2943 | | }; |
2944 | | |
2945 | | static Elf_Internal_Rela * |
2946 | | elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel, |
2947 | | Elf_Internal_Rela *relend, |
2948 | | bfd_vma offset, int type) |
2949 | 0 | { |
2950 | 0 | while (rel < relend) |
2951 | 0 | { |
2952 | 0 | if (rel->r_offset == offset |
2953 | 0 | && ELF64_R_TYPE (rel->r_info) == (unsigned int) type) |
2954 | 0 | return rel; |
2955 | 0 | ++rel; |
2956 | 0 | } |
2957 | 0 | return NULL; |
2958 | 0 | } |
2959 | | |
2960 | | static bool |
2961 | | elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval, |
2962 | | Elf_Internal_Rela *irel, unsigned long r_type) |
2963 | 0 | { |
2964 | 0 | unsigned int insn; |
2965 | 0 | bfd_signed_vma disp; |
2966 | | |
2967 | | /* Get the instruction. */ |
2968 | 0 | insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); |
2969 | |
|
2970 | 0 | if (insn >> 26 != OP_LDQ) |
2971 | 0 | { |
2972 | 0 | reloc_howto_type *howto = elf64_alpha_howto_table + r_type; |
2973 | 0 | _bfd_error_handler |
2974 | | /* xgettext:c-format */ |
2975 | 0 | (_("%pB: %pA+%#" PRIx64 ": warning: " |
2976 | 0 | "%s relocation against unexpected insn"), |
2977 | 0 | info->abfd, info->sec, (uint64_t) irel->r_offset, howto->name); |
2978 | 0 | return true; |
2979 | 0 | } |
2980 | | |
2981 | | /* Can't relax dynamic symbols. */ |
2982 | 0 | if (info->h != NULL |
2983 | 0 | && alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) |
2984 | 0 | return true; |
2985 | | |
2986 | | /* Can't use local-exec relocations in shared libraries. */ |
2987 | 0 | if (r_type == R_ALPHA_GOTTPREL |
2988 | 0 | && bfd_link_dll (info->link_info)) |
2989 | 0 | return true; |
2990 | | |
2991 | 0 | if (r_type == R_ALPHA_LITERAL) |
2992 | 0 | { |
2993 | | /* Look for nice constant addresses. This includes the not-uncommon |
2994 | | special case of 0 for undefweak symbols. */ |
2995 | 0 | if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak) |
2996 | 0 | || (!bfd_link_pic (info->link_info) |
2997 | 0 | && (symval >= (bfd_vma)-0x8000 || symval < 0x8000))) |
2998 | 0 | { |
2999 | 0 | disp = 0; |
3000 | 0 | insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); |
3001 | 0 | insn |= (symval & 0xffff); |
3002 | 0 | r_type = R_ALPHA_NONE; |
3003 | 0 | } |
3004 | 0 | else |
3005 | 0 | { |
3006 | | /* We may only create GPREL relocs during the second pass. */ |
3007 | 0 | if (info->link_info->relax_pass == 0) |
3008 | 0 | return true; |
3009 | | |
3010 | 0 | disp = symval - info->gp; |
3011 | 0 | insn = (OP_LDA << 26) | (insn & 0x03ff0000); |
3012 | 0 | r_type = R_ALPHA_GPREL16; |
3013 | 0 | } |
3014 | 0 | } |
3015 | 0 | else |
3016 | 0 | { |
3017 | 0 | bfd_vma dtp_base, tp_base; |
3018 | |
|
3019 | 0 | BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); |
3020 | 0 | dtp_base = alpha_get_dtprel_base (info->link_info); |
3021 | 0 | tp_base = alpha_get_tprel_base (info->link_info); |
3022 | 0 | disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base); |
3023 | |
|
3024 | 0 | insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); |
3025 | |
|
3026 | 0 | switch (r_type) |
3027 | 0 | { |
3028 | 0 | case R_ALPHA_GOTDTPREL: |
3029 | 0 | r_type = R_ALPHA_DTPREL16; |
3030 | 0 | break; |
3031 | 0 | case R_ALPHA_GOTTPREL: |
3032 | 0 | r_type = R_ALPHA_TPREL16; |
3033 | 0 | break; |
3034 | 0 | default: |
3035 | 0 | BFD_ASSERT (0); |
3036 | 0 | return false; |
3037 | 0 | } |
3038 | 0 | } |
3039 | | |
3040 | 0 | if (disp < -0x8000 || disp >= 0x8000) |
3041 | 0 | return true; |
3042 | | |
3043 | 0 | bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); |
3044 | 0 | info->changed_contents = true; |
3045 | | |
3046 | | /* Reduce the use count on this got entry by one, possibly |
3047 | | eliminating it. */ |
3048 | 0 | if (--info->gotent->use_count == 0) |
3049 | 0 | { |
3050 | 0 | int sz = alpha_got_entry_size (r_type); |
3051 | 0 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; |
3052 | 0 | if (!info->h) |
3053 | 0 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; |
3054 | 0 | } |
3055 | | |
3056 | | /* Smash the existing GOT relocation for its 16-bit immediate pair. */ |
3057 | 0 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type); |
3058 | 0 | info->changed_relocs = true; |
3059 | | |
3060 | | /* ??? Search forward through this basic block looking for insns |
3061 | | that use the target register. Stop after an insn modifying the |
3062 | | register is seen, or after a branch or call. |
3063 | | |
3064 | | Any such memory load insn may be substituted by a load directly |
3065 | | off the GP. This allows the memory load insn to be issued before |
3066 | | the calculated GP register would otherwise be ready. |
3067 | | |
3068 | | Any such jsr insn can be replaced by a bsr if it is in range. |
3069 | | |
3070 | | This would mean that we'd have to _add_ relocations, the pain of |
3071 | | which gives one pause. */ |
3072 | |
|
3073 | 0 | return true; |
3074 | 0 | } |
3075 | | |
3076 | | static bfd_vma |
3077 | | elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval) |
3078 | 0 | { |
3079 | | /* If the function has the same gp, and we can identify that the |
3080 | | function does not use its function pointer, we can eliminate the |
3081 | | address load. */ |
3082 | | |
3083 | | /* If the symbol is marked NOPV, we are being told the function never |
3084 | | needs its procedure value. */ |
3085 | 0 | if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV) |
3086 | 0 | return symval; |
3087 | | |
3088 | | /* If the symbol is marked STD_GP, we are being told the function does |
3089 | | a normal ldgp in the first two words. */ |
3090 | 0 | else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD) |
3091 | 0 | ; |
3092 | | |
3093 | | /* Otherwise, we may be able to identify a GP load in the first two |
3094 | | words, which we can then skip. */ |
3095 | 0 | else |
3096 | 0 | { |
3097 | 0 | Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; |
3098 | 0 | bfd_vma ofs; |
3099 | | |
3100 | | /* Load the relocations from the section that the target symbol is in. */ |
3101 | 0 | if (info->sec == info->tsec) |
3102 | 0 | { |
3103 | 0 | tsec_relocs = info->relocs; |
3104 | 0 | tsec_relend = info->relend; |
3105 | 0 | tsec_free = NULL; |
3106 | 0 | } |
3107 | 0 | else |
3108 | 0 | { |
3109 | 0 | tsec_relocs = (_bfd_elf_link_read_relocs |
3110 | 0 | (info->abfd, info->tsec, NULL, |
3111 | 0 | (Elf_Internal_Rela *) NULL, |
3112 | 0 | info->link_info->keep_memory)); |
3113 | 0 | if (tsec_relocs == NULL) |
3114 | 0 | return 0; |
3115 | 0 | tsec_relend = tsec_relocs + info->tsec->reloc_count; |
3116 | 0 | tsec_free = (elf_section_data (info->tsec)->relocs == tsec_relocs |
3117 | 0 | ? NULL |
3118 | 0 | : tsec_relocs); |
3119 | 0 | } |
3120 | | |
3121 | | /* Recover the symbol's offset within the section. */ |
3122 | 0 | ofs = (symval - info->tsec->output_section->vma |
3123 | 0 | - info->tsec->output_offset); |
3124 | | |
3125 | | /* Look for a GPDISP reloc. */ |
3126 | 0 | gpdisp = (elf64_alpha_find_reloc_at_ofs |
3127 | 0 | (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); |
3128 | |
|
3129 | 0 | if (!gpdisp || gpdisp->r_addend != 4) |
3130 | 0 | { |
3131 | 0 | free (tsec_free); |
3132 | 0 | return 0; |
3133 | 0 | } |
3134 | 0 | free (tsec_free); |
3135 | 0 | } |
3136 | | |
3137 | | /* We've now determined that we can skip an initial gp load. Verify |
3138 | | that the call and the target use the same gp. */ |
3139 | 0 | if (info->link_info->output_bfd->xvec != info->tsec->owner->xvec |
3140 | 0 | || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) |
3141 | 0 | return 0; |
3142 | | |
3143 | 0 | return symval + 8; |
3144 | 0 | } |
3145 | | |
3146 | | static bool |
3147 | | elf64_alpha_relax_with_lituse (struct alpha_relax_info *info, |
3148 | | bfd_vma symval, Elf_Internal_Rela *irel) |
3149 | 0 | { |
3150 | 0 | Elf_Internal_Rela *urel, *erel, *irelend = info->relend; |
3151 | 0 | int flags; |
3152 | 0 | bfd_signed_vma disp; |
3153 | 0 | bool fits16; |
3154 | 0 | bool fits32; |
3155 | 0 | bool lit_reused = false; |
3156 | 0 | bool all_optimized = true; |
3157 | 0 | bool changed_contents; |
3158 | 0 | bool changed_relocs; |
3159 | 0 | bfd_byte *contents = info->contents; |
3160 | 0 | bfd *abfd = info->abfd; |
3161 | 0 | bfd_vma sec_output_vma; |
3162 | 0 | unsigned int lit_insn; |
3163 | 0 | int relax_pass; |
3164 | |
|
3165 | 0 | lit_insn = bfd_get_32 (abfd, contents + irel->r_offset); |
3166 | 0 | if (lit_insn >> 26 != OP_LDQ) |
3167 | 0 | { |
3168 | 0 | _bfd_error_handler |
3169 | | /* xgettext:c-format */ |
3170 | 0 | (_("%pB: %pA+%#" PRIx64 ": warning: " |
3171 | 0 | "%s relocation against unexpected insn"), |
3172 | 0 | abfd, info->sec, (uint64_t) irel->r_offset, "LITERAL"); |
3173 | 0 | return true; |
3174 | 0 | } |
3175 | | |
3176 | | /* Can't relax dynamic symbols. */ |
3177 | 0 | if (info->h != NULL |
3178 | 0 | && alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) |
3179 | 0 | return true; |
3180 | | |
3181 | 0 | changed_contents = info->changed_contents; |
3182 | 0 | changed_relocs = info->changed_relocs; |
3183 | 0 | sec_output_vma = info->sec->output_section->vma + info->sec->output_offset; |
3184 | 0 | relax_pass = info->link_info->relax_pass; |
3185 | | |
3186 | | /* Summarize how this particular LITERAL is used. */ |
3187 | 0 | for (erel = irel+1, flags = 0; erel < irelend; ++erel) |
3188 | 0 | { |
3189 | 0 | if (ELF64_R_TYPE (erel->r_info) != R_ALPHA_LITUSE) |
3190 | 0 | break; |
3191 | 0 | if (erel->r_addend <= 6) |
3192 | 0 | flags |= 1 << erel->r_addend; |
3193 | 0 | } |
3194 | | |
3195 | | /* A little preparation for the loop... */ |
3196 | 0 | disp = symval - info->gp; |
3197 | |
|
3198 | 0 | for (urel = irel+1; urel < erel; ++urel) |
3199 | 0 | { |
3200 | 0 | bfd_vma urel_r_offset = urel->r_offset; |
3201 | 0 | unsigned int insn; |
3202 | 0 | int insn_disp; |
3203 | 0 | bfd_signed_vma xdisp; |
3204 | 0 | Elf_Internal_Rela nrel; |
3205 | |
|
3206 | 0 | insn = bfd_get_32 (abfd, contents + urel_r_offset); |
3207 | |
|
3208 | 0 | switch (urel->r_addend) |
3209 | 0 | { |
3210 | 0 | case LITUSE_ALPHA_ADDR: |
3211 | 0 | default: |
3212 | | /* This type is really just a placeholder to note that all |
3213 | | uses cannot be optimized, but to still allow some. */ |
3214 | 0 | all_optimized = false; |
3215 | 0 | break; |
3216 | | |
3217 | 0 | case LITUSE_ALPHA_BASE: |
3218 | | /* We may only create GPREL relocs during the second pass. */ |
3219 | 0 | if (relax_pass == 0) |
3220 | 0 | { |
3221 | 0 | all_optimized = false; |
3222 | 0 | break; |
3223 | 0 | } |
3224 | | |
3225 | | /* We can always optimize 16-bit displacements. */ |
3226 | | |
3227 | | /* Extract the displacement from the instruction, sign-extending |
3228 | | it if necessary, then test whether it is within 16 or 32 bits |
3229 | | displacement from GP. */ |
3230 | 0 | insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000; |
3231 | |
|
3232 | 0 | xdisp = disp + insn_disp; |
3233 | 0 | fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000); |
3234 | 0 | fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 |
3235 | 0 | && xdisp < 0x7fff8000); |
3236 | |
|
3237 | 0 | if (fits16) |
3238 | 0 | { |
3239 | | /* Take the op code and dest from this insn, take the base |
3240 | | register from the literal insn. Leave the offset alone. */ |
3241 | 0 | insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000); |
3242 | 0 | bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); |
3243 | 0 | changed_contents = true; |
3244 | |
|
3245 | 0 | nrel = *urel; |
3246 | 0 | nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
3247 | 0 | R_ALPHA_GPREL16); |
3248 | 0 | nrel.r_addend = irel->r_addend; |
3249 | | |
3250 | | /* As we adjust, move the reloc to the end so that we don't |
3251 | | break the LITERAL+LITUSE chain. */ |
3252 | 0 | if (urel < --erel) |
3253 | 0 | *urel-- = *erel; |
3254 | 0 | *erel = nrel; |
3255 | 0 | changed_relocs = true; |
3256 | 0 | } |
3257 | | |
3258 | | /* If all mem+byte, we can optimize 32-bit mem displacements. */ |
3259 | 0 | else if (fits32 && !(flags & ~6)) |
3260 | 0 | { |
3261 | | /* FIXME: sanity check that lit insn Ra is mem insn Rb. */ |
3262 | |
|
3263 | 0 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
3264 | 0 | R_ALPHA_GPRELHIGH); |
3265 | 0 | lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000); |
3266 | 0 | bfd_put_32 (abfd, (bfd_vma) lit_insn, contents + irel->r_offset); |
3267 | 0 | lit_reused = true; |
3268 | 0 | changed_contents = true; |
3269 | | |
3270 | | /* Since all relocs must be optimized, don't bother swapping |
3271 | | this relocation to the end. */ |
3272 | 0 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
3273 | 0 | R_ALPHA_GPRELLOW); |
3274 | 0 | urel->r_addend = irel->r_addend; |
3275 | 0 | changed_relocs = true; |
3276 | 0 | } |
3277 | 0 | else |
3278 | 0 | all_optimized = false; |
3279 | 0 | break; |
3280 | | |
3281 | 0 | case LITUSE_ALPHA_BYTOFF: |
3282 | | /* We can always optimize byte instructions. */ |
3283 | | |
3284 | | /* FIXME: sanity check the insn for byte op. Check that the |
3285 | | literal dest reg is indeed Rb in the byte insn. */ |
3286 | |
|
3287 | 0 | insn &= ~ (unsigned) 0x001ff000; |
3288 | 0 | insn |= ((symval & 7) << 13) | 0x1000; |
3289 | 0 | bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); |
3290 | 0 | changed_contents = true; |
3291 | |
|
3292 | 0 | nrel = *urel; |
3293 | 0 | nrel.r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3294 | 0 | nrel.r_addend = 0; |
3295 | | |
3296 | | /* As we adjust, move the reloc to the end so that we don't |
3297 | | break the LITERAL+LITUSE chain. */ |
3298 | 0 | if (urel < --erel) |
3299 | 0 | *urel-- = *erel; |
3300 | 0 | *erel = nrel; |
3301 | 0 | changed_relocs = true; |
3302 | 0 | break; |
3303 | | |
3304 | 0 | case LITUSE_ALPHA_JSR: |
3305 | 0 | case LITUSE_ALPHA_TLSGD: |
3306 | 0 | case LITUSE_ALPHA_TLSLDM: |
3307 | 0 | case LITUSE_ALPHA_JSRDIRECT: |
3308 | 0 | { |
3309 | 0 | bfd_vma optdest, org; |
3310 | 0 | bfd_signed_vma odisp; |
3311 | | |
3312 | | /* For undefined weak symbols, we're mostly interested in getting |
3313 | | rid of the got entry whenever possible, so optimize this to a |
3314 | | use of the zero register. */ |
3315 | 0 | if (info->h && info->h->root.root.type == bfd_link_hash_undefweak) |
3316 | 0 | { |
3317 | 0 | insn |= 31 << 16; |
3318 | 0 | bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); |
3319 | |
|
3320 | 0 | changed_contents = true; |
3321 | 0 | break; |
3322 | 0 | } |
3323 | | |
3324 | | /* If not zero, place to jump without needing pv. */ |
3325 | 0 | optdest = elf64_alpha_relax_opt_call (info, symval); |
3326 | 0 | org = sec_output_vma + urel_r_offset + 4; |
3327 | 0 | odisp = (optdest ? optdest : symval) - org; |
3328 | |
|
3329 | 0 | if (odisp >= -0x400000 && odisp < 0x400000) |
3330 | 0 | { |
3331 | 0 | Elf_Internal_Rela *xrel; |
3332 | | |
3333 | | /* Preserve branch prediction call stack when possible. */ |
3334 | 0 | if ((insn & INSN_JSR_MASK) == INSN_JSR) |
3335 | 0 | insn = (OP_BSR << 26) | (insn & 0x03e00000); |
3336 | 0 | else |
3337 | 0 | insn = (OP_BR << 26) | (insn & 0x03e00000); |
3338 | 0 | bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset); |
3339 | 0 | changed_contents = true; |
3340 | |
|
3341 | 0 | nrel = *urel; |
3342 | 0 | nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
3343 | 0 | R_ALPHA_BRADDR); |
3344 | 0 | nrel.r_addend = irel->r_addend; |
3345 | |
|
3346 | 0 | if (optdest) |
3347 | 0 | nrel.r_addend += optdest - symval; |
3348 | 0 | else |
3349 | 0 | all_optimized = false; |
3350 | | |
3351 | | /* Kill any HINT reloc that might exist for this insn. */ |
3352 | 0 | xrel = (elf64_alpha_find_reloc_at_ofs |
3353 | 0 | (info->relocs, info->relend, urel_r_offset, |
3354 | 0 | R_ALPHA_HINT)); |
3355 | 0 | if (xrel) |
3356 | 0 | xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3357 | | |
3358 | | /* As we adjust, move the reloc to the end so that we don't |
3359 | | break the LITERAL+LITUSE chain. */ |
3360 | 0 | if (urel < --erel) |
3361 | 0 | *urel-- = *erel; |
3362 | 0 | *erel = nrel; |
3363 | |
|
3364 | 0 | info->changed_relocs = true; |
3365 | 0 | } |
3366 | 0 | else |
3367 | 0 | all_optimized = false; |
3368 | | |
3369 | | /* Even if the target is not in range for a direct branch, |
3370 | | if we share a GP, we can eliminate the gp reload. */ |
3371 | 0 | if (optdest) |
3372 | 0 | { |
3373 | 0 | Elf_Internal_Rela *gpdisp |
3374 | 0 | = (elf64_alpha_find_reloc_at_ofs |
3375 | 0 | (info->relocs, irelend, urel_r_offset + 4, |
3376 | 0 | R_ALPHA_GPDISP)); |
3377 | 0 | if (gpdisp) |
3378 | 0 | { |
3379 | 0 | bfd_byte *p_ldah = contents + gpdisp->r_offset; |
3380 | 0 | bfd_byte *p_lda = p_ldah + gpdisp->r_addend; |
3381 | 0 | unsigned int ldah = bfd_get_32 (abfd, p_ldah); |
3382 | 0 | unsigned int lda = bfd_get_32 (abfd, p_lda); |
3383 | | |
3384 | | /* Verify that the instruction is "ldah $29,0($26)". |
3385 | | Consider a function that ends in a noreturn call, |
3386 | | and that the next function begins with an ldgp, |
3387 | | and that by accident there is no padding between. |
3388 | | In that case the insn would use $27 as the base. */ |
3389 | 0 | if (ldah == 0x27ba0000 && lda == 0x23bd0000) |
3390 | 0 | { |
3391 | 0 | bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_ldah); |
3392 | 0 | bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_lda); |
3393 | |
|
3394 | 0 | gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3395 | 0 | changed_contents = true; |
3396 | 0 | changed_relocs = true; |
3397 | 0 | } |
3398 | 0 | } |
3399 | 0 | } |
3400 | 0 | } |
3401 | 0 | break; |
3402 | 0 | } |
3403 | 0 | } |
3404 | | |
3405 | | /* If we reused the literal instruction, we must have optimized all. */ |
3406 | 0 | BFD_ASSERT(!lit_reused || all_optimized); |
3407 | | |
3408 | | /* If all cases were optimized, we can reduce the use count on this |
3409 | | got entry by one, possibly eliminating it. */ |
3410 | 0 | if (all_optimized) |
3411 | 0 | { |
3412 | 0 | if (--info->gotent->use_count == 0) |
3413 | 0 | { |
3414 | 0 | int sz = alpha_got_entry_size (R_ALPHA_LITERAL); |
3415 | 0 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; |
3416 | 0 | if (!info->h) |
3417 | 0 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; |
3418 | 0 | } |
3419 | | |
3420 | | /* If the literal instruction is no longer needed (it may have been |
3421 | | reused. We can eliminate it. */ |
3422 | | /* ??? For now, I don't want to deal with compacting the section, |
3423 | | so just nop it out. */ |
3424 | 0 | if (!lit_reused) |
3425 | 0 | { |
3426 | 0 | irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3427 | 0 | changed_relocs = true; |
3428 | |
|
3429 | 0 | bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, contents + irel->r_offset); |
3430 | 0 | changed_contents = true; |
3431 | 0 | } |
3432 | 0 | } |
3433 | |
|
3434 | 0 | info->changed_contents = changed_contents; |
3435 | 0 | info->changed_relocs = changed_relocs; |
3436 | |
|
3437 | 0 | if (all_optimized || relax_pass == 0) |
3438 | 0 | return true; |
3439 | 0 | return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL); |
3440 | 0 | } |
3441 | | |
3442 | | static bool |
3443 | | elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval, |
3444 | | Elf_Internal_Rela *irel, bool is_gd) |
3445 | 0 | { |
3446 | 0 | bfd_byte *pos[5]; |
3447 | 0 | unsigned int insn, tlsgd_reg; |
3448 | 0 | Elf_Internal_Rela *gpdisp, *hint; |
3449 | 0 | bool dynamic, use_gottprel; |
3450 | 0 | unsigned long new_symndx; |
3451 | |
|
3452 | 0 | dynamic = (info->h != NULL |
3453 | 0 | && alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)); |
3454 | | |
3455 | | /* If a TLS symbol is accessed using IE at least once, there is no point |
3456 | | to use dynamic model for it. */ |
3457 | 0 | if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE)) |
3458 | 0 | ; |
3459 | | |
3460 | | /* If the symbol is local, and we've already committed to DF_STATIC_TLS, |
3461 | | then we might as well relax to IE. */ |
3462 | 0 | else if (bfd_link_pic (info->link_info) && !dynamic |
3463 | 0 | && (info->link_info->flags & DF_STATIC_TLS)) |
3464 | 0 | ; |
3465 | | |
3466 | | /* Otherwise we must be building an executable to do anything. */ |
3467 | 0 | else if (bfd_link_pic (info->link_info)) |
3468 | 0 | return true; |
3469 | | |
3470 | | /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and |
3471 | | the matching LITUSE_TLS relocations. */ |
3472 | 0 | if (irel + 2 >= info->relend) |
3473 | 0 | return true; |
3474 | 0 | if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL |
3475 | 0 | || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE |
3476 | 0 | || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM)) |
3477 | 0 | return true; |
3478 | | |
3479 | | /* There must be a GPDISP relocation positioned immediately after the |
3480 | | LITUSE relocation. */ |
3481 | 0 | gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, |
3482 | 0 | irel[2].r_offset + 4, R_ALPHA_GPDISP); |
3483 | 0 | if (!gpdisp) |
3484 | 0 | return true; |
3485 | | |
3486 | 0 | pos[0] = info->contents + irel[0].r_offset; |
3487 | 0 | pos[1] = info->contents + irel[1].r_offset; |
3488 | 0 | pos[2] = info->contents + irel[2].r_offset; |
3489 | 0 | pos[3] = info->contents + gpdisp->r_offset; |
3490 | 0 | pos[4] = pos[3] + gpdisp->r_addend; |
3491 | | |
3492 | | /* Beware of the compiler hoisting part of the sequence out a loop |
3493 | | and adjusting the destination register for the TLSGD insn. If this |
3494 | | happens, there will be a move into $16 before the JSR insn, so only |
3495 | | transformations of the first insn pair should use this register. */ |
3496 | 0 | tlsgd_reg = bfd_get_32 (info->abfd, pos[0]); |
3497 | 0 | tlsgd_reg = (tlsgd_reg >> 21) & 31; |
3498 | | |
3499 | | /* Generally, the positions are not allowed to be out of order, lest the |
3500 | | modified insn sequence have different register lifetimes. We can make |
3501 | | an exception when pos 1 is adjacent to pos 0. */ |
3502 | 0 | if (pos[1] + 4 == pos[0]) |
3503 | 0 | { |
3504 | 0 | bfd_byte *tmp = pos[0]; |
3505 | 0 | pos[0] = pos[1]; |
3506 | 0 | pos[1] = tmp; |
3507 | 0 | } |
3508 | 0 | if (pos[1] >= pos[2] || pos[2] >= pos[3]) |
3509 | 0 | return true; |
3510 | | |
3511 | | /* Reduce the use count on the LITERAL relocation. Do this before we |
3512 | | smash the symndx when we adjust the relocations below. */ |
3513 | 0 | { |
3514 | 0 | struct alpha_elf_got_entry *lit_gotent; |
3515 | 0 | struct alpha_elf_link_hash_entry *lit_h; |
3516 | 0 | unsigned long indx; |
3517 | |
|
3518 | 0 | BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info); |
3519 | 0 | indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info; |
3520 | 0 | lit_h = alpha_elf_sym_hashes (info->abfd)[indx]; |
3521 | |
|
3522 | 0 | while (lit_h->root.root.type == bfd_link_hash_indirect |
3523 | 0 | || lit_h->root.root.type == bfd_link_hash_warning) |
3524 | 0 | lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link; |
3525 | |
|
3526 | 0 | for (lit_gotent = lit_h->got_entries; lit_gotent ; |
3527 | 0 | lit_gotent = lit_gotent->next) |
3528 | 0 | if (lit_gotent->gotobj == info->gotobj |
3529 | 0 | && lit_gotent->reloc_type == R_ALPHA_LITERAL |
3530 | 0 | && lit_gotent->addend == irel[1].r_addend) |
3531 | 0 | break; |
3532 | 0 | BFD_ASSERT (lit_gotent); |
3533 | |
|
3534 | 0 | if (--lit_gotent->use_count == 0) |
3535 | 0 | { |
3536 | 0 | int sz = alpha_got_entry_size (R_ALPHA_LITERAL); |
3537 | 0 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; |
3538 | 0 | } |
3539 | 0 | } |
3540 | | |
3541 | | /* Change |
3542 | | |
3543 | | lda $16,x($gp) !tlsgd!1 |
3544 | | ldq $27,__tls_get_addr($gp) !literal!1 |
3545 | | jsr $26,($27),__tls_get_addr !lituse_tlsgd!1 |
3546 | | ldah $29,0($26) !gpdisp!2 |
3547 | | lda $29,0($29) !gpdisp!2 |
3548 | | to |
3549 | | ldq $16,x($gp) !gottprel |
3550 | | unop |
3551 | | call_pal rduniq |
3552 | | addq $16,$0,$0 |
3553 | | unop |
3554 | | or the first pair to |
3555 | | lda $16,x($gp) !tprel |
3556 | | unop |
3557 | | or |
3558 | | ldah $16,x($gp) !tprelhi |
3559 | | lda $16,x($16) !tprello |
3560 | | |
3561 | | as appropriate. */ |
3562 | |
|
3563 | 0 | use_gottprel = false; |
3564 | 0 | new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF; |
3565 | | |
3566 | | /* Some compilers warn about a Boolean-looking expression being |
3567 | | used in a switch. The explicit cast silences them. */ |
3568 | 0 | switch ((int) (!dynamic && !bfd_link_pic (info->link_info))) |
3569 | 0 | { |
3570 | 0 | case 1: |
3571 | 0 | { |
3572 | 0 | bfd_vma tp_base; |
3573 | 0 | bfd_signed_vma disp; |
3574 | |
|
3575 | 0 | BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); |
3576 | 0 | tp_base = alpha_get_tprel_base (info->link_info); |
3577 | 0 | disp = symval - tp_base; |
3578 | |
|
3579 | 0 | if (disp >= -0x8000 && disp < 0x8000) |
3580 | 0 | { |
3581 | 0 | insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16); |
3582 | 0 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); |
3583 | 0 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); |
3584 | |
|
3585 | 0 | irel[0].r_offset = pos[0] - info->contents; |
3586 | 0 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16); |
3587 | 0 | irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3588 | 0 | break; |
3589 | 0 | } |
3590 | 0 | else if (disp >= -(bfd_signed_vma) 0x80000000 |
3591 | 0 | && disp < (bfd_signed_vma) 0x7fff8000 |
3592 | 0 | && pos[0] + 4 == pos[1]) |
3593 | 0 | { |
3594 | 0 | insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16); |
3595 | 0 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); |
3596 | 0 | insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16); |
3597 | 0 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]); |
3598 | |
|
3599 | 0 | irel[0].r_offset = pos[0] - info->contents; |
3600 | 0 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI); |
3601 | 0 | irel[1].r_offset = pos[1] - info->contents; |
3602 | 0 | irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO); |
3603 | 0 | break; |
3604 | 0 | } |
3605 | 0 | } |
3606 | | /* FALLTHRU */ |
3607 | | |
3608 | 0 | default: |
3609 | 0 | use_gottprel = true; |
3610 | |
|
3611 | 0 | insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16); |
3612 | 0 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); |
3613 | 0 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); |
3614 | |
|
3615 | 0 | irel[0].r_offset = pos[0] - info->contents; |
3616 | 0 | irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL); |
3617 | 0 | irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3618 | 0 | break; |
3619 | 0 | } |
3620 | | |
3621 | 0 | bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]); |
3622 | |
|
3623 | 0 | insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0); |
3624 | 0 | bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]); |
3625 | |
|
3626 | 0 | bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]); |
3627 | |
|
3628 | 0 | irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3629 | 0 | gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3630 | |
|
3631 | 0 | hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, |
3632 | 0 | irel[2].r_offset, R_ALPHA_HINT); |
3633 | 0 | if (hint) |
3634 | 0 | hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
3635 | |
|
3636 | 0 | info->changed_contents = true; |
3637 | 0 | info->changed_relocs = true; |
3638 | | |
3639 | | /* Reduce the use count on the TLSGD/TLSLDM relocation. */ |
3640 | 0 | if (--info->gotent->use_count == 0) |
3641 | 0 | { |
3642 | 0 | int sz = alpha_got_entry_size (info->gotent->reloc_type); |
3643 | 0 | alpha_elf_tdata (info->gotobj)->total_got_size -= sz; |
3644 | 0 | if (!info->h) |
3645 | 0 | alpha_elf_tdata (info->gotobj)->local_got_size -= sz; |
3646 | 0 | } |
3647 | | |
3648 | | /* If we've switched to a GOTTPREL relocation, increment the reference |
3649 | | count on that got entry. */ |
3650 | 0 | if (use_gottprel) |
3651 | 0 | { |
3652 | 0 | struct alpha_elf_got_entry *tprel_gotent; |
3653 | |
|
3654 | 0 | for (tprel_gotent = *info->first_gotent; tprel_gotent ; |
3655 | 0 | tprel_gotent = tprel_gotent->next) |
3656 | 0 | if (tprel_gotent->gotobj == info->gotobj |
3657 | 0 | && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL |
3658 | 0 | && tprel_gotent->addend == irel->r_addend) |
3659 | 0 | break; |
3660 | 0 | if (tprel_gotent) |
3661 | 0 | tprel_gotent->use_count++; |
3662 | 0 | else |
3663 | 0 | { |
3664 | 0 | if (info->gotent->use_count == 0) |
3665 | 0 | tprel_gotent = info->gotent; |
3666 | 0 | else |
3667 | 0 | { |
3668 | 0 | tprel_gotent = (struct alpha_elf_got_entry *) |
3669 | 0 | bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry)); |
3670 | 0 | if (!tprel_gotent) |
3671 | 0 | return false; |
3672 | | |
3673 | 0 | tprel_gotent->next = *info->first_gotent; |
3674 | 0 | *info->first_gotent = tprel_gotent; |
3675 | |
|
3676 | 0 | tprel_gotent->gotobj = info->gotobj; |
3677 | 0 | tprel_gotent->addend = irel->r_addend; |
3678 | 0 | tprel_gotent->got_offset = -1; |
3679 | 0 | tprel_gotent->reloc_done = 0; |
3680 | 0 | tprel_gotent->reloc_xlated = 0; |
3681 | 0 | } |
3682 | | |
3683 | 0 | tprel_gotent->use_count = 1; |
3684 | 0 | tprel_gotent->reloc_type = R_ALPHA_GOTTPREL; |
3685 | 0 | } |
3686 | 0 | } |
3687 | | |
3688 | 0 | return true; |
3689 | 0 | } |
3690 | | |
3691 | | static bool |
3692 | | elf64_alpha_relax_section (bfd *abfd, asection *sec, |
3693 | | struct bfd_link_info *link_info, bool *again) |
3694 | 0 | { |
3695 | 0 | Elf_Internal_Shdr *symtab_hdr; |
3696 | 0 | Elf_Internal_Rela *internal_relocs; |
3697 | 0 | Elf_Internal_Rela *irel, *irelend; |
3698 | 0 | Elf_Internal_Sym *isymbuf = NULL; |
3699 | 0 | struct alpha_elf_got_entry **local_got_entries; |
3700 | 0 | struct alpha_relax_info info; |
3701 | 0 | struct alpha_elf_link_hash_table * htab; |
3702 | 0 | int relax_pass; |
3703 | |
|
3704 | 0 | htab = alpha_elf_hash_table (link_info); |
3705 | 0 | if (htab == NULL) |
3706 | 0 | return false; |
3707 | | |
3708 | | /* There's nothing to change, yet. */ |
3709 | 0 | *again = false; |
3710 | |
|
3711 | 0 | if (bfd_link_relocatable (link_info) |
3712 | 0 | || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC | SEC_HAS_CONTENTS)) |
3713 | 0 | != (SEC_CODE | SEC_RELOC | SEC_ALLOC | SEC_HAS_CONTENTS)) |
3714 | 0 | || sec->reloc_count == 0) |
3715 | 0 | return true; |
3716 | | |
3717 | 0 | BFD_ASSERT (is_alpha_elf (abfd)); |
3718 | 0 | relax_pass = link_info->relax_pass; |
3719 | | |
3720 | | /* Make sure our GOT and PLT tables are up-to-date. */ |
3721 | 0 | if (htab->relax_trip != link_info->relax_trip) |
3722 | 0 | { |
3723 | 0 | htab->relax_trip = link_info->relax_trip; |
3724 | | |
3725 | | /* This should never fail after the initial round, since the only error |
3726 | | is GOT overflow, and relaxation only shrinks the table. However, we |
3727 | | may only merge got sections during the first pass. If we merge |
3728 | | sections after we've created GPREL relocs, the GP for the merged |
3729 | | section backs up which may put the relocs out of range. */ |
3730 | 0 | if (!elf64_alpha_size_got_sections (link_info, relax_pass == 0)) |
3731 | 0 | abort (); |
3732 | 0 | if (elf_hash_table (link_info)->dynamic_sections_created) |
3733 | 0 | { |
3734 | 0 | elf64_alpha_size_plt_section (link_info); |
3735 | 0 | elf64_alpha_size_rela_got_section (link_info); |
3736 | 0 | } |
3737 | 0 | } |
3738 | | |
3739 | 0 | symtab_hdr = &elf_symtab_hdr (abfd); |
3740 | 0 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; |
3741 | | |
3742 | | /* Load the relocations for this section. */ |
3743 | 0 | internal_relocs = (_bfd_elf_link_read_relocs |
3744 | 0 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, |
3745 | 0 | link_info->keep_memory)); |
3746 | 0 | if (internal_relocs == NULL) |
3747 | 0 | return false; |
3748 | | |
3749 | 0 | memset(&info, 0, sizeof (info)); |
3750 | 0 | info.abfd = abfd; |
3751 | 0 | info.sec = sec; |
3752 | 0 | info.link_info = link_info; |
3753 | 0 | info.symtab_hdr = symtab_hdr; |
3754 | 0 | info.relocs = internal_relocs; |
3755 | 0 | info.relend = irelend = internal_relocs + sec->reloc_count; |
3756 | | |
3757 | | /* Find the GP for this object. Do not store the result back via |
3758 | | _bfd_set_gp_value, since this could change again before final. */ |
3759 | 0 | info.gotobj = alpha_elf_tdata (abfd)->gotobj; |
3760 | 0 | if (info.gotobj) |
3761 | 0 | { |
3762 | 0 | asection *sgot = alpha_elf_tdata (info.gotobj)->got; |
3763 | 0 | info.gp = (sgot->output_section->vma |
3764 | 0 | + sgot->output_offset |
3765 | 0 | + 0x8000); |
3766 | 0 | } |
3767 | | |
3768 | | /* Get the section contents. */ |
3769 | 0 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
3770 | 0 | info.contents = elf_section_data (sec)->this_hdr.contents; |
3771 | 0 | else |
3772 | 0 | { |
3773 | 0 | if (!bfd_malloc_and_get_section (abfd, sec, &info.contents)) |
3774 | 0 | goto error_return; |
3775 | 0 | } |
3776 | | |
3777 | 0 | for (irel = internal_relocs; irel < irelend; irel++) |
3778 | 0 | { |
3779 | 0 | bfd_vma symval; |
3780 | 0 | struct alpha_elf_got_entry *gotent; |
3781 | 0 | unsigned long r_type = ELF64_R_TYPE (irel->r_info); |
3782 | 0 | unsigned long r_symndx = ELF64_R_SYM (irel->r_info); |
3783 | | |
3784 | | /* Early exit for unhandled or unrelaxable relocations. */ |
3785 | 0 | if (r_type != R_ALPHA_LITERAL) |
3786 | 0 | { |
3787 | | /* We complete everything except LITERAL in the first pass. */ |
3788 | 0 | if (relax_pass != 0) |
3789 | 0 | continue; |
3790 | 0 | if (r_type == R_ALPHA_TLSLDM) |
3791 | 0 | { |
3792 | | /* The symbol for a TLSLDM reloc is ignored. Collapse the |
3793 | | reloc to the STN_UNDEF (0) symbol so that they all match. */ |
3794 | 0 | r_symndx = STN_UNDEF; |
3795 | 0 | } |
3796 | 0 | else if (r_type != R_ALPHA_GOTDTPREL |
3797 | 0 | && r_type != R_ALPHA_GOTTPREL |
3798 | 0 | && r_type != R_ALPHA_TLSGD) |
3799 | 0 | continue; |
3800 | 0 | } |
3801 | | |
3802 | | /* Get the value of the symbol referred to by the reloc. */ |
3803 | 0 | if (r_symndx < symtab_hdr->sh_info) |
3804 | 0 | { |
3805 | | /* A local symbol. */ |
3806 | 0 | Elf_Internal_Sym *isym; |
3807 | | |
3808 | | /* Read this BFD's local symbols. */ |
3809 | 0 | if (isymbuf == NULL) |
3810 | 0 | { |
3811 | 0 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
3812 | 0 | if (isymbuf == NULL) |
3813 | 0 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
3814 | 0 | symtab_hdr->sh_info, 0, |
3815 | 0 | NULL, NULL, NULL); |
3816 | 0 | if (isymbuf == NULL) |
3817 | 0 | goto error_return; |
3818 | 0 | } |
3819 | | |
3820 | 0 | isym = isymbuf + r_symndx; |
3821 | | |
3822 | | /* Given the symbol for a TLSLDM reloc is ignored, this also |
3823 | | means forcing the symbol value to the tp base. */ |
3824 | 0 | if (r_type == R_ALPHA_TLSLDM) |
3825 | 0 | { |
3826 | 0 | info.tsec = bfd_abs_section_ptr; |
3827 | 0 | symval = alpha_get_tprel_base (info.link_info); |
3828 | 0 | } |
3829 | 0 | else |
3830 | 0 | { |
3831 | 0 | symval = isym->st_value; |
3832 | 0 | if (isym->st_shndx == SHN_UNDEF) |
3833 | 0 | continue; |
3834 | 0 | else if (isym->st_shndx == SHN_ABS) |
3835 | 0 | info.tsec = bfd_abs_section_ptr; |
3836 | 0 | else if (isym->st_shndx == SHN_COMMON) |
3837 | 0 | info.tsec = bfd_com_section_ptr; |
3838 | 0 | else |
3839 | 0 | info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
3840 | 0 | } |
3841 | | |
3842 | 0 | info.h = NULL; |
3843 | 0 | info.other = isym->st_other; |
3844 | 0 | if (local_got_entries) |
3845 | 0 | info.first_gotent = &local_got_entries[r_symndx]; |
3846 | 0 | else |
3847 | 0 | { |
3848 | 0 | info.first_gotent = &info.gotent; |
3849 | 0 | info.gotent = NULL; |
3850 | 0 | } |
3851 | 0 | } |
3852 | 0 | else |
3853 | 0 | { |
3854 | 0 | unsigned long indx; |
3855 | 0 | struct alpha_elf_link_hash_entry *h; |
3856 | |
|
3857 | 0 | indx = r_symndx - symtab_hdr->sh_info; |
3858 | 0 | h = alpha_elf_sym_hashes (abfd)[indx]; |
3859 | 0 | BFD_ASSERT (h != NULL); |
3860 | |
|
3861 | 0 | while (h->root.root.type == bfd_link_hash_indirect |
3862 | 0 | || h->root.root.type == bfd_link_hash_warning) |
3863 | 0 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
3864 | | |
3865 | | /* If the symbol is undefined, we can't do anything with it. */ |
3866 | 0 | if (h->root.root.type == bfd_link_hash_undefined) |
3867 | 0 | continue; |
3868 | | |
3869 | | /* If the symbol isn't defined in the current module, |
3870 | | again we can't do anything. */ |
3871 | 0 | if (h->root.root.type == bfd_link_hash_undefweak) |
3872 | 0 | { |
3873 | 0 | info.tsec = bfd_abs_section_ptr; |
3874 | 0 | symval = 0; |
3875 | 0 | } |
3876 | 0 | else if (!h->root.def_regular) |
3877 | 0 | { |
3878 | | /* Except for TLSGD relocs, which can sometimes be |
3879 | | relaxed to GOTTPREL relocs. */ |
3880 | 0 | if (r_type != R_ALPHA_TLSGD) |
3881 | 0 | continue; |
3882 | 0 | info.tsec = bfd_abs_section_ptr; |
3883 | 0 | symval = 0; |
3884 | 0 | } |
3885 | 0 | else |
3886 | 0 | { |
3887 | 0 | info.tsec = h->root.root.u.def.section; |
3888 | 0 | symval = h->root.root.u.def.value; |
3889 | 0 | } |
3890 | | |
3891 | 0 | info.h = h; |
3892 | 0 | info.other = h->root.other; |
3893 | 0 | info.first_gotent = &h->got_entries; |
3894 | 0 | } |
3895 | | |
3896 | | /* Search for the got entry to be used by this relocation. */ |
3897 | 0 | for (gotent = *info.first_gotent; gotent ; gotent = gotent->next) |
3898 | 0 | if (gotent->gotobj == info.gotobj |
3899 | 0 | && gotent->reloc_type == r_type |
3900 | 0 | && gotent->addend == irel->r_addend) |
3901 | 0 | break; |
3902 | 0 | info.gotent = gotent; |
3903 | |
|
3904 | 0 | symval += info.tsec->output_section->vma + info.tsec->output_offset; |
3905 | 0 | symval += irel->r_addend; |
3906 | |
|
3907 | 0 | switch (r_type) |
3908 | 0 | { |
3909 | 0 | case R_ALPHA_LITERAL: |
3910 | 0 | BFD_ASSERT(info.gotent != NULL); |
3911 | | |
3912 | | /* If there exist LITUSE relocations immediately following, this |
3913 | | opens up all sorts of interesting optimizations, because we |
3914 | | now know every location that this address load is used. */ |
3915 | 0 | if (irel+1 < irelend |
3916 | 0 | && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE) |
3917 | 0 | { |
3918 | 0 | if (!elf64_alpha_relax_with_lituse (&info, symval, irel)) |
3919 | 0 | goto error_return; |
3920 | 0 | } |
3921 | 0 | else |
3922 | 0 | { |
3923 | 0 | if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) |
3924 | 0 | goto error_return; |
3925 | 0 | } |
3926 | 0 | break; |
3927 | | |
3928 | 0 | case R_ALPHA_GOTDTPREL: |
3929 | 0 | case R_ALPHA_GOTTPREL: |
3930 | 0 | BFD_ASSERT(info.gotent != NULL); |
3931 | 0 | if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) |
3932 | 0 | goto error_return; |
3933 | 0 | break; |
3934 | | |
3935 | 0 | case R_ALPHA_TLSGD: |
3936 | 0 | case R_ALPHA_TLSLDM: |
3937 | 0 | BFD_ASSERT(info.gotent != NULL); |
3938 | 0 | if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel, |
3939 | 0 | r_type == R_ALPHA_TLSGD)) |
3940 | 0 | goto error_return; |
3941 | 0 | break; |
3942 | 0 | } |
3943 | 0 | } |
3944 | | |
3945 | 0 | if (isymbuf != NULL |
3946 | 0 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
3947 | 0 | { |
3948 | 0 | if (!link_info->keep_memory) |
3949 | 0 | free (isymbuf); |
3950 | 0 | else |
3951 | 0 | { |
3952 | | /* Cache the symbols for elf_link_input_bfd. */ |
3953 | 0 | symtab_hdr->contents = (unsigned char *) isymbuf; |
3954 | 0 | } |
3955 | 0 | } |
3956 | |
|
3957 | 0 | if (info.contents != NULL |
3958 | 0 | && elf_section_data (sec)->this_hdr.contents != info.contents) |
3959 | 0 | { |
3960 | 0 | if (!info.changed_contents && !link_info->keep_memory) |
3961 | 0 | free (info.contents); |
3962 | 0 | else |
3963 | 0 | { |
3964 | | /* Cache the section contents for elf_link_input_bfd. */ |
3965 | 0 | elf_section_data (sec)->this_hdr.contents = info.contents; |
3966 | 0 | } |
3967 | 0 | } |
3968 | |
|
3969 | 0 | if (elf_section_data (sec)->relocs != internal_relocs) |
3970 | 0 | { |
3971 | 0 | if (!info.changed_relocs) |
3972 | 0 | free (internal_relocs); |
3973 | 0 | else |
3974 | 0 | elf_section_data (sec)->relocs = internal_relocs; |
3975 | 0 | } |
3976 | |
|
3977 | 0 | *again = info.changed_contents || info.changed_relocs; |
3978 | |
|
3979 | 0 | return true; |
3980 | | |
3981 | 0 | error_return: |
3982 | 0 | if (symtab_hdr->contents != (unsigned char *) isymbuf) |
3983 | 0 | free (isymbuf); |
3984 | 0 | if (elf_section_data (sec)->this_hdr.contents != info.contents) |
3985 | 0 | free (info.contents); |
3986 | 0 | if (elf_section_data (sec)->relocs != internal_relocs) |
3987 | 0 | free (internal_relocs); |
3988 | 0 | return false; |
3989 | 0 | } |
3990 | | |
3991 | | /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET) |
3992 | | into the next available slot in SREL. */ |
3993 | | |
3994 | | static void |
3995 | | elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info, |
3996 | | asection *sec, asection *srel, bfd_vma offset, |
3997 | | long dynindx, long rtype, bfd_vma addend) |
3998 | 0 | { |
3999 | 0 | Elf_Internal_Rela outrel; |
4000 | 0 | bfd_byte *loc; |
4001 | |
|
4002 | 0 | BFD_ASSERT (srel != NULL); |
4003 | |
|
4004 | 0 | outrel.r_info = ELF64_R_INFO (dynindx, rtype); |
4005 | 0 | outrel.r_addend = addend; |
4006 | |
|
4007 | 0 | offset = _bfd_elf_section_offset (abfd, info, sec, offset); |
4008 | 0 | if ((offset | 1) != (bfd_vma) -1) |
4009 | 0 | outrel.r_offset = sec->output_section->vma + sec->output_offset + offset; |
4010 | 0 | else |
4011 | 0 | memset (&outrel, 0, sizeof (outrel)); |
4012 | |
|
4013 | 0 | loc = srel->contents; |
4014 | 0 | loc += srel->reloc_count++ * sizeof (Elf64_External_Rela); |
4015 | 0 | bfd_elf64_swap_reloca_out (abfd, &outrel, loc); |
4016 | 0 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size); |
4017 | 0 | } |
4018 | | |
4019 | | /* Relocate an Alpha ELF section for a relocatable link. |
4020 | | |
4021 | | We don't have to change anything unless the reloc is against a section |
4022 | | symbol, in which case we have to adjust according to where the section |
4023 | | symbol winds up in the output section. */ |
4024 | | |
4025 | | static int |
4026 | | elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED, |
4027 | | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
4028 | | bfd *input_bfd, asection *input_section, |
4029 | | bfd_byte *contents ATTRIBUTE_UNUSED, |
4030 | | Elf_Internal_Rela *relocs, |
4031 | | Elf_Internal_Sym *local_syms, |
4032 | | asection **local_sections) |
4033 | 0 | { |
4034 | 0 | unsigned long symtab_hdr_sh_info; |
4035 | 0 | Elf_Internal_Rela *rel; |
4036 | 0 | Elf_Internal_Rela *relend; |
4037 | 0 | struct elf_link_hash_entry **sym_hashes; |
4038 | 0 | bool ret_val = true; |
4039 | |
|
4040 | 0 | symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info; |
4041 | 0 | sym_hashes = elf_sym_hashes (input_bfd); |
4042 | |
|
4043 | 0 | relend = relocs + input_section->reloc_count; |
4044 | 0 | for (rel = relocs; rel < relend; rel++) |
4045 | 0 | { |
4046 | 0 | unsigned long r_symndx; |
4047 | 0 | Elf_Internal_Sym *sym; |
4048 | 0 | asection *sec; |
4049 | 0 | unsigned long r_type; |
4050 | |
|
4051 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
4052 | 0 | if (r_type >= R_ALPHA_max) |
4053 | 0 | { |
4054 | 0 | _bfd_error_handler |
4055 | | /* xgettext:c-format */ |
4056 | 0 | (_("%pB: unsupported relocation type %#x"), |
4057 | 0 | input_bfd, (int) r_type); |
4058 | 0 | bfd_set_error (bfd_error_bad_value); |
4059 | 0 | ret_val = false; |
4060 | 0 | continue; |
4061 | 0 | } |
4062 | | |
4063 | | /* The symbol associated with GPDISP and LITUSE is |
4064 | | immaterial. Only the addend is significant. */ |
4065 | 0 | if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE) |
4066 | 0 | continue; |
4067 | | |
4068 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
4069 | 0 | if (r_symndx < symtab_hdr_sh_info) |
4070 | 0 | { |
4071 | 0 | sym = local_syms + r_symndx; |
4072 | 0 | sec = local_sections[r_symndx]; |
4073 | 0 | } |
4074 | 0 | else |
4075 | 0 | { |
4076 | 0 | struct elf_link_hash_entry *h; |
4077 | |
|
4078 | 0 | h = sym_hashes[r_symndx - symtab_hdr_sh_info]; |
4079 | |
|
4080 | 0 | while (h->root.type == bfd_link_hash_indirect |
4081 | 0 | || h->root.type == bfd_link_hash_warning) |
4082 | 0 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
4083 | |
|
4084 | 0 | if (h->root.type != bfd_link_hash_defined |
4085 | 0 | && h->root.type != bfd_link_hash_defweak) |
4086 | 0 | continue; |
4087 | | |
4088 | 0 | sym = NULL; |
4089 | 0 | sec = h->root.u.def.section; |
4090 | 0 | } |
4091 | | |
4092 | 0 | if (sec != NULL && discarded_section (sec)) |
4093 | 0 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
4094 | 0 | rel, 1, relend, |
4095 | 0 | elf64_alpha_howto_table + r_type, 0, |
4096 | 0 | contents); |
4097 | |
|
4098 | 0 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
4099 | 0 | rel->r_addend += sec->output_offset; |
4100 | 0 | } |
4101 | |
|
4102 | 0 | return ret_val; |
4103 | 0 | } |
4104 | | |
4105 | | /* Relocate an Alpha ELF section. */ |
4106 | | |
4107 | | static int |
4108 | | elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
4109 | | bfd *input_bfd, asection *input_section, |
4110 | | bfd_byte *contents, Elf_Internal_Rela *relocs, |
4111 | | Elf_Internal_Sym *local_syms, |
4112 | | asection **local_sections) |
4113 | 0 | { |
4114 | 0 | Elf_Internal_Shdr *symtab_hdr; |
4115 | 0 | Elf_Internal_Rela *rel; |
4116 | 0 | Elf_Internal_Rela *relend; |
4117 | 0 | asection *sgot, *srel, *srelgot; |
4118 | 0 | bfd *dynobj, *gotobj; |
4119 | 0 | bfd_vma gp, tp_base, dtp_base; |
4120 | 0 | struct alpha_elf_got_entry **local_got_entries; |
4121 | 0 | bool ret_val; |
4122 | |
|
4123 | 0 | BFD_ASSERT (is_alpha_elf (input_bfd)); |
4124 | | |
4125 | | /* Handle relocatable links with a smaller loop. */ |
4126 | 0 | if (bfd_link_relocatable (info)) |
4127 | 0 | return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, |
4128 | 0 | input_section, contents, relocs, |
4129 | 0 | local_syms, local_sections); |
4130 | | |
4131 | | /* This is a final link. */ |
4132 | | |
4133 | 0 | ret_val = true; |
4134 | |
|
4135 | 0 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
4136 | |
|
4137 | 0 | dynobj = elf_hash_table (info)->dynobj; |
4138 | 0 | srelgot = elf_hash_table (info)->srelgot; |
4139 | |
|
4140 | 0 | if (input_section->flags & SEC_ALLOC) |
4141 | 0 | { |
4142 | 0 | const char *section_name; |
4143 | 0 | section_name = (bfd_elf_string_from_elf_section |
4144 | 0 | (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, |
4145 | 0 | _bfd_elf_single_rel_hdr (input_section)->sh_name)); |
4146 | 0 | BFD_ASSERT(section_name != NULL); |
4147 | 0 | srel = bfd_get_linker_section (dynobj, section_name); |
4148 | 0 | } |
4149 | 0 | else |
4150 | 0 | srel = NULL; |
4151 | | |
4152 | | /* Find the gp value for this input bfd. */ |
4153 | 0 | gotobj = alpha_elf_tdata (input_bfd)->gotobj; |
4154 | 0 | if (gotobj) |
4155 | 0 | { |
4156 | 0 | sgot = alpha_elf_tdata (gotobj)->got; |
4157 | 0 | gp = _bfd_get_gp_value (gotobj); |
4158 | 0 | if (gp == 0) |
4159 | 0 | { |
4160 | 0 | gp = (sgot->output_section->vma |
4161 | 0 | + sgot->output_offset |
4162 | 0 | + 0x8000); |
4163 | 0 | _bfd_set_gp_value (gotobj, gp); |
4164 | 0 | } |
4165 | 0 | } |
4166 | 0 | else |
4167 | 0 | { |
4168 | 0 | sgot = NULL; |
4169 | 0 | gp = 0; |
4170 | 0 | } |
4171 | |
|
4172 | 0 | local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries; |
4173 | |
|
4174 | 0 | if (elf_hash_table (info)->tls_sec != NULL) |
4175 | 0 | { |
4176 | 0 | dtp_base = alpha_get_dtprel_base (info); |
4177 | 0 | tp_base = alpha_get_tprel_base (info); |
4178 | 0 | } |
4179 | 0 | else |
4180 | 0 | dtp_base = tp_base = 0; |
4181 | |
|
4182 | 0 | relend = relocs + input_section->reloc_count; |
4183 | 0 | for (rel = relocs; rel < relend; rel++) |
4184 | 0 | { |
4185 | 0 | struct alpha_elf_link_hash_entry *h = NULL; |
4186 | 0 | struct alpha_elf_got_entry *gotent; |
4187 | 0 | bfd_reloc_status_type r; |
4188 | 0 | reloc_howto_type *howto; |
4189 | 0 | unsigned long r_symndx; |
4190 | 0 | Elf_Internal_Sym *sym = NULL; |
4191 | 0 | asection *sec = NULL; |
4192 | 0 | bfd_vma value; |
4193 | 0 | bfd_vma addend; |
4194 | 0 | bool dynamic_symbol_p; |
4195 | 0 | bool unresolved_reloc = false; |
4196 | 0 | bool undef_weak_ref = false; |
4197 | 0 | unsigned long r_type; |
4198 | |
|
4199 | 0 | r_type = ELF64_R_TYPE(rel->r_info); |
4200 | 0 | if (r_type >= R_ALPHA_max) |
4201 | 0 | { |
4202 | 0 | _bfd_error_handler |
4203 | | /* xgettext:c-format */ |
4204 | 0 | (_("%pB: unsupported relocation type %#x"), |
4205 | 0 | input_bfd, (int) r_type); |
4206 | 0 | bfd_set_error (bfd_error_bad_value); |
4207 | 0 | ret_val = false; |
4208 | 0 | continue; |
4209 | 0 | } |
4210 | | |
4211 | 0 | howto = elf64_alpha_howto_table + r_type; |
4212 | 0 | r_symndx = ELF64_R_SYM(rel->r_info); |
4213 | | |
4214 | | /* The symbol for a TLSLDM reloc is ignored. Collapse the |
4215 | | reloc to the STN_UNDEF (0) symbol so that they all match. */ |
4216 | 0 | if (r_type == R_ALPHA_TLSLDM) |
4217 | 0 | r_symndx = STN_UNDEF; |
4218 | |
|
4219 | 0 | if (r_symndx < symtab_hdr->sh_info) |
4220 | 0 | { |
4221 | 0 | asection *msec; |
4222 | 0 | sym = local_syms + r_symndx; |
4223 | 0 | sec = local_sections[r_symndx]; |
4224 | 0 | msec = sec; |
4225 | 0 | value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel); |
4226 | | |
4227 | | /* If this is a tp-relative relocation against sym STN_UNDEF (0), |
4228 | | this is hackery from relax_section. Force the value to |
4229 | | be the tls module base. */ |
4230 | 0 | if (r_symndx == STN_UNDEF |
4231 | 0 | && (r_type == R_ALPHA_TLSLDM |
4232 | 0 | || r_type == R_ALPHA_GOTTPREL |
4233 | 0 | || r_type == R_ALPHA_TPREL64 |
4234 | 0 | || r_type == R_ALPHA_TPRELHI |
4235 | 0 | || r_type == R_ALPHA_TPRELLO |
4236 | 0 | || r_type == R_ALPHA_TPREL16)) |
4237 | 0 | value = dtp_base; |
4238 | |
|
4239 | 0 | if (local_got_entries) |
4240 | 0 | gotent = local_got_entries[r_symndx]; |
4241 | 0 | else |
4242 | 0 | gotent = NULL; |
4243 | | |
4244 | | /* Need to adjust local GOT entries' addends for SEC_MERGE |
4245 | | unless it has been done already. */ |
4246 | 0 | if ((sec->flags & SEC_MERGE) |
4247 | 0 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION |
4248 | 0 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE |
4249 | 0 | && gotent |
4250 | 0 | && !gotent->reloc_xlated) |
4251 | 0 | { |
4252 | 0 | struct alpha_elf_got_entry *ent; |
4253 | |
|
4254 | 0 | for (ent = gotent; ent; ent = ent->next) |
4255 | 0 | { |
4256 | 0 | ent->reloc_xlated = 1; |
4257 | 0 | if (ent->use_count == 0) |
4258 | 0 | continue; |
4259 | 0 | msec = sec; |
4260 | 0 | ent->addend = |
4261 | 0 | _bfd_merged_section_offset (output_bfd, &msec, |
4262 | 0 | elf_section_data (sec)-> |
4263 | 0 | sec_info, |
4264 | 0 | sym->st_value + ent->addend); |
4265 | 0 | ent->addend -= sym->st_value; |
4266 | 0 | ent->addend += msec->output_section->vma |
4267 | 0 | + msec->output_offset |
4268 | 0 | - sec->output_section->vma |
4269 | 0 | - sec->output_offset; |
4270 | 0 | } |
4271 | 0 | } |
4272 | |
|
4273 | 0 | dynamic_symbol_p = false; |
4274 | 0 | } |
4275 | 0 | else |
4276 | 0 | { |
4277 | 0 | bool warned, ignored; |
4278 | 0 | struct elf_link_hash_entry *hh; |
4279 | 0 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
4280 | |
|
4281 | 0 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
4282 | 0 | r_symndx, symtab_hdr, sym_hashes, |
4283 | 0 | hh, sec, value, |
4284 | 0 | unresolved_reloc, warned, ignored); |
4285 | | |
4286 | 0 | if (warned) |
4287 | 0 | continue; |
4288 | | |
4289 | 0 | if (value == 0 |
4290 | 0 | && ! unresolved_reloc |
4291 | 0 | && hh->root.type == bfd_link_hash_undefweak) |
4292 | 0 | undef_weak_ref = true; |
4293 | |
|
4294 | 0 | h = (struct alpha_elf_link_hash_entry *) hh; |
4295 | 0 | dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info); |
4296 | 0 | gotent = h->got_entries; |
4297 | 0 | } |
4298 | | |
4299 | 0 | if (sec != NULL && discarded_section (sec)) |
4300 | 0 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
4301 | 0 | rel, 1, relend, howto, 0, contents); |
4302 | |
|
4303 | 0 | addend = rel->r_addend; |
4304 | 0 | value += addend; |
4305 | | |
4306 | | /* Search for the proper got entry. */ |
4307 | 0 | for (; gotent ; gotent = gotent->next) |
4308 | 0 | if (gotent->gotobj == gotobj |
4309 | 0 | && gotent->reloc_type == r_type |
4310 | 0 | && gotent->addend == addend) |
4311 | 0 | break; |
4312 | |
|
4313 | 0 | switch (r_type) |
4314 | 0 | { |
4315 | 0 | case R_ALPHA_GPDISP: |
4316 | 0 | { |
4317 | 0 | bfd_byte *p_ldah, *p_lda; |
4318 | |
|
4319 | 0 | BFD_ASSERT(gp != 0); |
4320 | |
|
4321 | 0 | value = (input_section->output_section->vma |
4322 | 0 | + input_section->output_offset |
4323 | 0 | + rel->r_offset); |
4324 | |
|
4325 | 0 | p_ldah = contents + rel->r_offset; |
4326 | 0 | p_lda = p_ldah + rel->r_addend; |
4327 | |
|
4328 | 0 | r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value, |
4329 | 0 | p_ldah, p_lda); |
4330 | 0 | } |
4331 | 0 | break; |
4332 | | |
4333 | 0 | case R_ALPHA_LITERAL: |
4334 | 0 | BFD_ASSERT(sgot != NULL); |
4335 | 0 | BFD_ASSERT(gp != 0); |
4336 | 0 | BFD_ASSERT(gotent != NULL); |
4337 | 0 | BFD_ASSERT(gotent->use_count >= 1); |
4338 | |
|
4339 | 0 | if (!gotent->reloc_done) |
4340 | 0 | { |
4341 | 0 | gotent->reloc_done = 1; |
4342 | |
|
4343 | 0 | bfd_put_64 (output_bfd, value, |
4344 | 0 | sgot->contents + gotent->got_offset); |
4345 | | |
4346 | | /* If the symbol has been forced local, output a |
4347 | | RELATIVE reloc, otherwise it will be handled in |
4348 | | finish_dynamic_symbol. */ |
4349 | 0 | if (bfd_link_pic (info) |
4350 | 0 | && !dynamic_symbol_p |
4351 | 0 | && !undef_weak_ref) |
4352 | 0 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, |
4353 | 0 | gotent->got_offset, 0, |
4354 | 0 | R_ALPHA_RELATIVE, value); |
4355 | 0 | } |
4356 | |
|
4357 | 0 | value = (sgot->output_section->vma |
4358 | 0 | + sgot->output_offset |
4359 | 0 | + gotent->got_offset); |
4360 | 0 | value -= gp; |
4361 | 0 | goto default_reloc; |
4362 | | |
4363 | 0 | case R_ALPHA_GPREL32: |
4364 | 0 | case R_ALPHA_GPREL16: |
4365 | 0 | case R_ALPHA_GPRELLOW: |
4366 | 0 | if (dynamic_symbol_p) |
4367 | 0 | { |
4368 | 0 | _bfd_error_handler |
4369 | | /* xgettext:c-format */ |
4370 | 0 | (_("%pB: gp-relative relocation against dynamic symbol %s"), |
4371 | 0 | input_bfd, h->root.root.root.string); |
4372 | 0 | ret_val = false; |
4373 | 0 | } |
4374 | 0 | BFD_ASSERT(gp != 0); |
4375 | 0 | value -= gp; |
4376 | 0 | goto default_reloc; |
4377 | | |
4378 | 0 | case R_ALPHA_GPRELHIGH: |
4379 | 0 | if (dynamic_symbol_p) |
4380 | 0 | { |
4381 | 0 | _bfd_error_handler |
4382 | | /* xgettext:c-format */ |
4383 | 0 | (_("%pB: gp-relative relocation against dynamic symbol %s"), |
4384 | 0 | input_bfd, h->root.root.root.string); |
4385 | 0 | ret_val = false; |
4386 | 0 | } |
4387 | 0 | BFD_ASSERT(gp != 0); |
4388 | 0 | value -= gp; |
4389 | 0 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); |
4390 | 0 | goto default_reloc; |
4391 | | |
4392 | 0 | case R_ALPHA_HINT: |
4393 | | /* A call to a dynamic symbol is definitely out of range of |
4394 | | the 16-bit displacement. Don't bother writing anything. */ |
4395 | 0 | if (dynamic_symbol_p) |
4396 | 0 | { |
4397 | 0 | r = bfd_reloc_ok; |
4398 | 0 | break; |
4399 | 0 | } |
4400 | | /* The regular PC-relative stuff measures from the start of |
4401 | | the instruction rather than the end. */ |
4402 | 0 | value -= 4; |
4403 | 0 | goto default_reloc; |
4404 | | |
4405 | 0 | case R_ALPHA_BRADDR: |
4406 | 0 | if (dynamic_symbol_p) |
4407 | 0 | { |
4408 | 0 | _bfd_error_handler |
4409 | | /* xgettext:c-format */ |
4410 | 0 | (_("%pB: pc-relative relocation against dynamic symbol %s"), |
4411 | 0 | input_bfd, h->root.root.root.string); |
4412 | 0 | ret_val = false; |
4413 | 0 | } |
4414 | | /* The regular PC-relative stuff measures from the start of |
4415 | | the instruction rather than the end. */ |
4416 | 0 | value -= 4; |
4417 | 0 | goto default_reloc; |
4418 | | |
4419 | 0 | case R_ALPHA_BRSGP: |
4420 | 0 | { |
4421 | 0 | int other; |
4422 | 0 | const char *name; |
4423 | | |
4424 | | /* The regular PC-relative stuff measures from the start of |
4425 | | the instruction rather than the end. */ |
4426 | 0 | value -= 4; |
4427 | | |
4428 | | /* The source and destination gp must be the same. Note that |
4429 | | the source will always have an assigned gp, since we forced |
4430 | | one in check_relocs, but that the destination may not, as |
4431 | | it might not have had any relocations at all. Also take |
4432 | | care not to crash if H is an undefined symbol. */ |
4433 | 0 | if (h != NULL && sec != NULL |
4434 | 0 | && alpha_elf_tdata (sec->owner)->gotobj |
4435 | 0 | && gotobj != alpha_elf_tdata (sec->owner)->gotobj) |
4436 | 0 | { |
4437 | 0 | _bfd_error_handler |
4438 | | /* xgettext:c-format */ |
4439 | 0 | (_("%pB: change in gp: BRSGP %s"), |
4440 | 0 | input_bfd, h->root.root.root.string); |
4441 | 0 | ret_val = false; |
4442 | 0 | } |
4443 | | |
4444 | | /* The symbol should be marked either NOPV or STD_GPLOAD. */ |
4445 | 0 | if (h != NULL) |
4446 | 0 | other = h->root.other; |
4447 | 0 | else |
4448 | 0 | other = sym->st_other; |
4449 | 0 | switch (other & STO_ALPHA_STD_GPLOAD) |
4450 | 0 | { |
4451 | 0 | case STO_ALPHA_NOPV: |
4452 | 0 | break; |
4453 | 0 | case STO_ALPHA_STD_GPLOAD: |
4454 | 0 | value += 8; |
4455 | 0 | break; |
4456 | 0 | default: |
4457 | 0 | if (h != NULL) |
4458 | 0 | name = h->root.root.root.string; |
4459 | 0 | else |
4460 | 0 | { |
4461 | 0 | name = (bfd_elf_string_from_elf_section |
4462 | 0 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
4463 | 0 | if (name == NULL) |
4464 | 0 | name = _("<unknown>"); |
4465 | 0 | else if (name[0] == 0) |
4466 | 0 | name = bfd_section_name (sec); |
4467 | 0 | } |
4468 | 0 | _bfd_error_handler |
4469 | | /* xgettext:c-format */ |
4470 | 0 | (_("%pB: !samegp reloc against symbol without .prologue: %s"), |
4471 | 0 | input_bfd, name); |
4472 | 0 | ret_val = false; |
4473 | 0 | break; |
4474 | 0 | } |
4475 | | |
4476 | 0 | goto default_reloc; |
4477 | 0 | } |
4478 | | |
4479 | 0 | case R_ALPHA_REFLONG: |
4480 | 0 | case R_ALPHA_REFQUAD: |
4481 | 0 | case R_ALPHA_DTPREL64: |
4482 | 0 | case R_ALPHA_TPREL64: |
4483 | 0 | { |
4484 | 0 | long dynindx, dyntype = r_type; |
4485 | 0 | bfd_vma dynaddend; |
4486 | | |
4487 | | /* Careful here to remember RELATIVE relocations for global |
4488 | | variables for symbolic shared objects. */ |
4489 | |
|
4490 | 0 | if (dynamic_symbol_p) |
4491 | 0 | { |
4492 | 0 | BFD_ASSERT(h->root.dynindx != -1); |
4493 | 0 | dynindx = h->root.dynindx; |
4494 | 0 | dynaddend = addend; |
4495 | 0 | addend = 0, value = 0; |
4496 | 0 | } |
4497 | 0 | else if (r_type == R_ALPHA_DTPREL64) |
4498 | 0 | { |
4499 | 0 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
4500 | 0 | value -= dtp_base; |
4501 | 0 | goto default_reloc; |
4502 | 0 | } |
4503 | 0 | else if (r_type == R_ALPHA_TPREL64) |
4504 | 0 | { |
4505 | 0 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
4506 | 0 | if (!bfd_link_dll (info)) |
4507 | 0 | { |
4508 | 0 | value -= tp_base; |
4509 | 0 | goto default_reloc; |
4510 | 0 | } |
4511 | 0 | dynindx = 0; |
4512 | 0 | dynaddend = value - dtp_base; |
4513 | 0 | } |
4514 | 0 | else if (bfd_link_pic (info) |
4515 | 0 | && r_symndx != STN_UNDEF |
4516 | 0 | && (input_section->flags & SEC_ALLOC) |
4517 | 0 | && !undef_weak_ref |
4518 | 0 | && !(unresolved_reloc |
4519 | 0 | && (_bfd_elf_section_offset (output_bfd, info, |
4520 | 0 | input_section, |
4521 | 0 | rel->r_offset) |
4522 | 0 | == (bfd_vma) -1))) |
4523 | 0 | { |
4524 | 0 | if (r_type == R_ALPHA_REFLONG) |
4525 | 0 | { |
4526 | 0 | _bfd_error_handler |
4527 | | /* xgettext:c-format */ |
4528 | 0 | (_("%pB: unhandled dynamic relocation against %s"), |
4529 | 0 | input_bfd, |
4530 | 0 | h->root.root.root.string); |
4531 | 0 | ret_val = false; |
4532 | 0 | } |
4533 | 0 | dynindx = 0; |
4534 | 0 | dyntype = R_ALPHA_RELATIVE; |
4535 | 0 | dynaddend = value; |
4536 | 0 | } |
4537 | 0 | else |
4538 | 0 | goto default_reloc; |
4539 | | |
4540 | 0 | if (input_section->flags & SEC_ALLOC) |
4541 | 0 | elf64_alpha_emit_dynrel (output_bfd, info, input_section, |
4542 | 0 | srel, rel->r_offset, dynindx, |
4543 | 0 | dyntype, dynaddend); |
4544 | 0 | } |
4545 | 0 | goto default_reloc; |
4546 | | |
4547 | 0 | case R_ALPHA_SREL16: |
4548 | 0 | case R_ALPHA_SREL32: |
4549 | 0 | case R_ALPHA_SREL64: |
4550 | 0 | if (dynamic_symbol_p) |
4551 | 0 | { |
4552 | 0 | _bfd_error_handler |
4553 | | /* xgettext:c-format */ |
4554 | 0 | (_("%pB: pc-relative relocation against dynamic symbol %s"), |
4555 | 0 | input_bfd, h->root.root.root.string); |
4556 | 0 | ret_val = false; |
4557 | 0 | } |
4558 | 0 | else if (bfd_link_pic (info) |
4559 | 0 | && undef_weak_ref) |
4560 | 0 | { |
4561 | 0 | _bfd_error_handler |
4562 | | /* xgettext:c-format */ |
4563 | 0 | (_("%pB: pc-relative relocation against undefined weak symbol %s"), |
4564 | 0 | input_bfd, h->root.root.root.string); |
4565 | 0 | ret_val = false; |
4566 | 0 | } |
4567 | | |
4568 | | |
4569 | | /* ??? .eh_frame references to discarded sections will be smashed |
4570 | | to relocations against SHN_UNDEF. The .eh_frame format allows |
4571 | | NULL to be encoded as 0 in any format, so this works here. */ |
4572 | 0 | if (r_symndx == STN_UNDEF |
4573 | 0 | || (unresolved_reloc |
4574 | 0 | && _bfd_elf_section_offset (output_bfd, info, |
4575 | 0 | input_section, |
4576 | 0 | rel->r_offset) == (bfd_vma) -1)) |
4577 | 0 | howto = (elf64_alpha_howto_table |
4578 | 0 | + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG)); |
4579 | 0 | goto default_reloc; |
4580 | | |
4581 | 0 | case R_ALPHA_TLSLDM: |
4582 | | /* Ignore the symbol for the relocation. The result is always |
4583 | | the current module. */ |
4584 | 0 | dynamic_symbol_p = 0; |
4585 | | /* FALLTHRU */ |
4586 | |
|
4587 | 0 | case R_ALPHA_TLSGD: |
4588 | 0 | if (!gotent->reloc_done) |
4589 | 0 | { |
4590 | 0 | gotent->reloc_done = 1; |
4591 | | |
4592 | | /* Note that the module index for the main program is 1. */ |
4593 | 0 | bfd_put_64 (output_bfd, |
4594 | 0 | !bfd_link_pic (info) && !dynamic_symbol_p, |
4595 | 0 | sgot->contents + gotent->got_offset); |
4596 | | |
4597 | | /* If the symbol has been forced local, output a |
4598 | | DTPMOD64 reloc, otherwise it will be handled in |
4599 | | finish_dynamic_symbol. */ |
4600 | 0 | if (bfd_link_pic (info) && !dynamic_symbol_p) |
4601 | 0 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, |
4602 | 0 | gotent->got_offset, 0, |
4603 | 0 | R_ALPHA_DTPMOD64, 0); |
4604 | |
|
4605 | 0 | if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM) |
4606 | 0 | value = 0; |
4607 | 0 | else |
4608 | 0 | { |
4609 | 0 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
4610 | 0 | value -= dtp_base; |
4611 | 0 | } |
4612 | 0 | bfd_put_64 (output_bfd, value, |
4613 | 0 | sgot->contents + gotent->got_offset + 8); |
4614 | 0 | } |
4615 | |
|
4616 | 0 | value = (sgot->output_section->vma |
4617 | 0 | + sgot->output_offset |
4618 | 0 | + gotent->got_offset); |
4619 | 0 | value -= gp; |
4620 | 0 | goto default_reloc; |
4621 | | |
4622 | 0 | case R_ALPHA_DTPRELHI: |
4623 | 0 | case R_ALPHA_DTPRELLO: |
4624 | 0 | case R_ALPHA_DTPREL16: |
4625 | 0 | if (dynamic_symbol_p) |
4626 | 0 | { |
4627 | 0 | _bfd_error_handler |
4628 | | /* xgettext:c-format */ |
4629 | 0 | (_("%pB: dtp-relative relocation against dynamic symbol %s"), |
4630 | 0 | input_bfd, h->root.root.root.string); |
4631 | 0 | ret_val = false; |
4632 | 0 | } |
4633 | 0 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
4634 | 0 | value -= dtp_base; |
4635 | 0 | if (r_type == R_ALPHA_DTPRELHI) |
4636 | 0 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); |
4637 | 0 | goto default_reloc; |
4638 | | |
4639 | 0 | case R_ALPHA_TPRELHI: |
4640 | 0 | case R_ALPHA_TPRELLO: |
4641 | 0 | case R_ALPHA_TPREL16: |
4642 | 0 | if (bfd_link_dll (info)) |
4643 | 0 | { |
4644 | 0 | _bfd_error_handler |
4645 | | /* xgettext:c-format */ |
4646 | 0 | (_("%pB: TLS local exec code cannot be linked into shared objects"), |
4647 | 0 | input_bfd); |
4648 | 0 | ret_val = false; |
4649 | 0 | } |
4650 | 0 | else if (dynamic_symbol_p) |
4651 | 0 | { |
4652 | 0 | _bfd_error_handler |
4653 | | /* xgettext:c-format */ |
4654 | 0 | (_("%pB: tp-relative relocation against dynamic symbol %s"), |
4655 | 0 | input_bfd, h->root.root.root.string); |
4656 | 0 | ret_val = false; |
4657 | 0 | } |
4658 | 0 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
4659 | 0 | value -= tp_base; |
4660 | 0 | if (r_type == R_ALPHA_TPRELHI) |
4661 | 0 | value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); |
4662 | 0 | goto default_reloc; |
4663 | | |
4664 | 0 | case R_ALPHA_GOTDTPREL: |
4665 | 0 | case R_ALPHA_GOTTPREL: |
4666 | 0 | BFD_ASSERT(sgot != NULL); |
4667 | 0 | BFD_ASSERT(gp != 0); |
4668 | 0 | BFD_ASSERT(gotent != NULL); |
4669 | 0 | BFD_ASSERT(gotent->use_count >= 1); |
4670 | |
|
4671 | 0 | if (!gotent->reloc_done) |
4672 | 0 | { |
4673 | 0 | gotent->reloc_done = 1; |
4674 | |
|
4675 | 0 | if (dynamic_symbol_p) |
4676 | 0 | value = 0; |
4677 | 0 | else |
4678 | 0 | { |
4679 | 0 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
4680 | 0 | if (r_type == R_ALPHA_GOTDTPREL) |
4681 | 0 | value -= dtp_base; |
4682 | 0 | else if (bfd_link_executable (info)) |
4683 | 0 | value -= tp_base; |
4684 | 0 | else |
4685 | 0 | { |
4686 | 0 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, |
4687 | 0 | gotent->got_offset, 0, |
4688 | 0 | R_ALPHA_TPREL64, |
4689 | 0 | value - dtp_base); |
4690 | 0 | value = 0; |
4691 | 0 | } |
4692 | 0 | } |
4693 | 0 | bfd_put_64 (output_bfd, value, |
4694 | 0 | sgot->contents + gotent->got_offset); |
4695 | 0 | } |
4696 | |
|
4697 | 0 | value = (sgot->output_section->vma |
4698 | 0 | + sgot->output_offset |
4699 | 0 | + gotent->got_offset); |
4700 | 0 | value -= gp; |
4701 | 0 | goto default_reloc; |
4702 | | |
4703 | 0 | default: |
4704 | 0 | default_reloc: |
4705 | 0 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
4706 | 0 | contents, rel->r_offset, value, 0); |
4707 | 0 | break; |
4708 | 0 | } |
4709 | | |
4710 | 0 | switch (r) |
4711 | 0 | { |
4712 | 0 | case bfd_reloc_ok: |
4713 | 0 | break; |
4714 | | |
4715 | 0 | case bfd_reloc_overflow: |
4716 | 0 | { |
4717 | 0 | const char *name; |
4718 | | |
4719 | | /* Don't warn if the overflow is due to pc relative reloc |
4720 | | against discarded section. Section optimization code should |
4721 | | handle it. */ |
4722 | |
|
4723 | 0 | if (r_symndx < symtab_hdr->sh_info |
4724 | 0 | && sec != NULL && howto->pc_relative |
4725 | 0 | && discarded_section (sec)) |
4726 | 0 | break; |
4727 | | |
4728 | 0 | if (h != NULL) |
4729 | 0 | name = NULL; |
4730 | 0 | else |
4731 | 0 | { |
4732 | 0 | name = (bfd_elf_string_from_elf_section |
4733 | 0 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
4734 | 0 | if (name == NULL) |
4735 | 0 | return false; |
4736 | 0 | if (*name == '\0') |
4737 | 0 | name = bfd_section_name (sec); |
4738 | 0 | } |
4739 | 0 | (*info->callbacks->reloc_overflow) |
4740 | 0 | (info, (h ? &h->root.root : NULL), name, howto->name, |
4741 | 0 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
4742 | 0 | } |
4743 | 0 | break; |
4744 | | |
4745 | 0 | default: |
4746 | 0 | case bfd_reloc_outofrange: |
4747 | 0 | abort (); |
4748 | 0 | } |
4749 | 0 | } |
4750 | | |
4751 | 0 | return ret_val; |
4752 | 0 | } |
4753 | | |
4754 | | /* Finish up dynamic symbol handling. We set the contents of various |
4755 | | dynamic sections here. */ |
4756 | | |
4757 | | static bool |
4758 | | elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, |
4759 | | struct elf_link_hash_entry *h, |
4760 | | Elf_Internal_Sym *sym) |
4761 | 0 | { |
4762 | 0 | struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h; |
4763 | |
|
4764 | 0 | if (h->needs_plt) |
4765 | 0 | { |
4766 | | /* Fill in the .plt entry for this symbol. */ |
4767 | 0 | asection *splt, *sgot, *srel; |
4768 | 0 | Elf_Internal_Rela outrel; |
4769 | 0 | bfd_byte *loc; |
4770 | 0 | bfd_vma got_addr, plt_addr; |
4771 | 0 | bfd_vma plt_index; |
4772 | 0 | struct alpha_elf_got_entry *gotent; |
4773 | |
|
4774 | 0 | BFD_ASSERT (h->dynindx != -1); |
4775 | |
|
4776 | 0 | splt = elf_hash_table (info)->splt; |
4777 | 0 | BFD_ASSERT (splt != NULL); |
4778 | 0 | srel = elf_hash_table (info)->srelplt; |
4779 | 0 | BFD_ASSERT (srel != NULL); |
4780 | |
|
4781 | 0 | for (gotent = ah->got_entries; gotent ; gotent = gotent->next) |
4782 | 0 | if (gotent->reloc_type == R_ALPHA_LITERAL |
4783 | 0 | && gotent->use_count > 0) |
4784 | 0 | { |
4785 | 0 | unsigned int insn; |
4786 | 0 | int disp; |
4787 | |
|
4788 | 0 | sgot = alpha_elf_tdata (gotent->gotobj)->got; |
4789 | 0 | BFD_ASSERT (sgot != NULL); |
4790 | |
|
4791 | 0 | BFD_ASSERT (gotent->got_offset != -1); |
4792 | 0 | BFD_ASSERT (gotent->plt_offset != -1); |
4793 | |
|
4794 | 0 | got_addr = (sgot->output_section->vma |
4795 | 0 | + sgot->output_offset |
4796 | 0 | + gotent->got_offset); |
4797 | 0 | plt_addr = (splt->output_section->vma |
4798 | 0 | + splt->output_offset |
4799 | 0 | + gotent->plt_offset); |
4800 | |
|
4801 | 0 | plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; |
4802 | | |
4803 | | /* Fill in the entry in the procedure linkage table. */ |
4804 | 0 | if (elf64_alpha_use_secureplt) |
4805 | 0 | { |
4806 | 0 | disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4); |
4807 | 0 | insn = INSN_AD (INSN_BR, 31, disp); |
4808 | 0 | bfd_put_32 (output_bfd, insn, |
4809 | 0 | splt->contents + gotent->plt_offset); |
4810 | |
|
4811 | 0 | plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE) |
4812 | 0 | / NEW_PLT_ENTRY_SIZE); |
4813 | 0 | } |
4814 | 0 | else |
4815 | 0 | { |
4816 | 0 | disp = -(gotent->plt_offset + 4); |
4817 | 0 | insn = INSN_AD (INSN_BR, 28, disp); |
4818 | 0 | bfd_put_32 (output_bfd, insn, |
4819 | 0 | splt->contents + gotent->plt_offset); |
4820 | 0 | bfd_put_32 (output_bfd, INSN_UNOP, |
4821 | 0 | splt->contents + gotent->plt_offset + 4); |
4822 | 0 | bfd_put_32 (output_bfd, INSN_UNOP, |
4823 | 0 | splt->contents + gotent->plt_offset + 8); |
4824 | |
|
4825 | 0 | plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE) |
4826 | 0 | / OLD_PLT_ENTRY_SIZE); |
4827 | 0 | } |
4828 | | |
4829 | | /* Fill in the entry in the .rela.plt section. */ |
4830 | 0 | outrel.r_offset = got_addr; |
4831 | 0 | outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT); |
4832 | 0 | outrel.r_addend = 0; |
4833 | |
|
4834 | 0 | loc = srel->contents + plt_index * sizeof (Elf64_External_Rela); |
4835 | 0 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
4836 | | |
4837 | | /* Fill in the entry in the .got. */ |
4838 | 0 | bfd_put_64 (output_bfd, plt_addr, |
4839 | 0 | sgot->contents + gotent->got_offset); |
4840 | 0 | } |
4841 | 0 | } |
4842 | 0 | else if (alpha_elf_dynamic_symbol_p (h, info)) |
4843 | 0 | { |
4844 | | /* Fill in the dynamic relocations for this symbol's .got entries. */ |
4845 | 0 | asection *srel; |
4846 | 0 | struct alpha_elf_got_entry *gotent; |
4847 | |
|
4848 | 0 | srel = elf_hash_table (info)->srelgot; |
4849 | 0 | BFD_ASSERT (srel != NULL); |
4850 | |
|
4851 | 0 | for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; |
4852 | 0 | gotent != NULL; |
4853 | 0 | gotent = gotent->next) |
4854 | 0 | { |
4855 | 0 | asection *sgot; |
4856 | 0 | long r_type; |
4857 | |
|
4858 | 0 | if (gotent->use_count == 0) |
4859 | 0 | continue; |
4860 | | |
4861 | 0 | sgot = alpha_elf_tdata (gotent->gotobj)->got; |
4862 | |
|
4863 | 0 | r_type = gotent->reloc_type; |
4864 | 0 | switch (r_type) |
4865 | 0 | { |
4866 | 0 | case R_ALPHA_LITERAL: |
4867 | 0 | r_type = R_ALPHA_GLOB_DAT; |
4868 | 0 | break; |
4869 | 0 | case R_ALPHA_TLSGD: |
4870 | 0 | r_type = R_ALPHA_DTPMOD64; |
4871 | 0 | break; |
4872 | 0 | case R_ALPHA_GOTDTPREL: |
4873 | 0 | r_type = R_ALPHA_DTPREL64; |
4874 | 0 | break; |
4875 | 0 | case R_ALPHA_GOTTPREL: |
4876 | 0 | r_type = R_ALPHA_TPREL64; |
4877 | 0 | break; |
4878 | 0 | case R_ALPHA_TLSLDM: |
4879 | 0 | default: |
4880 | 0 | abort (); |
4881 | 0 | } |
4882 | | |
4883 | 0 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, |
4884 | 0 | gotent->got_offset, h->dynindx, |
4885 | 0 | r_type, gotent->addend); |
4886 | |
|
4887 | 0 | if (gotent->reloc_type == R_ALPHA_TLSGD) |
4888 | 0 | elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, |
4889 | 0 | gotent->got_offset + 8, h->dynindx, |
4890 | 0 | R_ALPHA_DTPREL64, gotent->addend); |
4891 | 0 | } |
4892 | 0 | } |
4893 | | |
4894 | | /* Mark some specially defined symbols as absolute. */ |
4895 | 0 | if (h == elf_hash_table (info)->hdynamic |
4896 | 0 | || h == elf_hash_table (info)->hgot |
4897 | 0 | || h == elf_hash_table (info)->hplt) |
4898 | 0 | sym->st_shndx = SHN_ABS; |
4899 | |
|
4900 | 0 | return true; |
4901 | 0 | } |
4902 | | |
4903 | | /* Finish up the dynamic sections. */ |
4904 | | |
4905 | | static bool |
4906 | | elf64_alpha_finish_dynamic_sections (bfd *output_bfd, |
4907 | | struct bfd_link_info *info) |
4908 | 0 | { |
4909 | 0 | bfd *dynobj; |
4910 | 0 | asection *sdyn; |
4911 | |
|
4912 | 0 | dynobj = elf_hash_table (info)->dynobj; |
4913 | 0 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
4914 | |
|
4915 | 0 | if (elf_hash_table (info)->dynamic_sections_created) |
4916 | 0 | { |
4917 | 0 | asection *splt, *sgotplt, *srelaplt; |
4918 | 0 | Elf64_External_Dyn *dyncon, *dynconend; |
4919 | 0 | bfd_vma plt_vma, gotplt_vma; |
4920 | |
|
4921 | 0 | splt = elf_hash_table (info)->splt; |
4922 | 0 | srelaplt = elf_hash_table (info)->srelplt; |
4923 | 0 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
4924 | |
|
4925 | 0 | plt_vma = splt->output_section->vma + splt->output_offset; |
4926 | |
|
4927 | 0 | gotplt_vma = 0; |
4928 | 0 | if (elf64_alpha_use_secureplt) |
4929 | 0 | { |
4930 | 0 | sgotplt = elf_hash_table (info)->sgotplt; |
4931 | 0 | BFD_ASSERT (sgotplt != NULL); |
4932 | 0 | if (sgotplt->size > 0) |
4933 | 0 | gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset; |
4934 | 0 | } |
4935 | |
|
4936 | 0 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
4937 | 0 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
4938 | 0 | for (; dyncon < dynconend; dyncon++) |
4939 | 0 | { |
4940 | 0 | Elf_Internal_Dyn dyn; |
4941 | |
|
4942 | 0 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
4943 | |
|
4944 | 0 | switch (dyn.d_tag) |
4945 | 0 | { |
4946 | 0 | case DT_PLTGOT: |
4947 | 0 | dyn.d_un.d_ptr |
4948 | 0 | = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma; |
4949 | 0 | break; |
4950 | 0 | case DT_PLTRELSZ: |
4951 | 0 | dyn.d_un.d_val = srelaplt ? srelaplt->size : 0; |
4952 | 0 | break; |
4953 | 0 | case DT_JMPREL: |
4954 | 0 | dyn.d_un.d_ptr = srelaplt ? (srelaplt->output_section->vma |
4955 | 0 | + srelaplt->output_offset) : 0; |
4956 | 0 | break; |
4957 | 0 | } |
4958 | | |
4959 | 0 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
4960 | 0 | } |
4961 | | |
4962 | | /* Initialize the plt header. */ |
4963 | 0 | if (splt->size > 0) |
4964 | 0 | { |
4965 | 0 | unsigned int insn; |
4966 | 0 | int ofs; |
4967 | |
|
4968 | 0 | if (elf64_alpha_use_secureplt) |
4969 | 0 | { |
4970 | 0 | ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE); |
4971 | |
|
4972 | 0 | insn = INSN_ABC (INSN_SUBQ, 27, 28, 25); |
4973 | 0 | bfd_put_32 (output_bfd, insn, splt->contents); |
4974 | |
|
4975 | 0 | insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16); |
4976 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 4); |
4977 | |
|
4978 | 0 | insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25); |
4979 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 8); |
4980 | |
|
4981 | 0 | insn = INSN_ABO (INSN_LDA, 28, 28, ofs); |
4982 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 12); |
4983 | |
|
4984 | 0 | insn = INSN_ABO (INSN_LDQ, 27, 28, 0); |
4985 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 16); |
4986 | |
|
4987 | 0 | insn = INSN_ABC (INSN_ADDQ, 25, 25, 25); |
4988 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 20); |
4989 | |
|
4990 | 0 | insn = INSN_ABO (INSN_LDQ, 28, 28, 8); |
4991 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 24); |
4992 | |
|
4993 | 0 | insn = INSN_AB (INSN_JMP, 31, 27); |
4994 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 28); |
4995 | |
|
4996 | 0 | insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE); |
4997 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 32); |
4998 | 0 | } |
4999 | 0 | else |
5000 | 0 | { |
5001 | 0 | insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */ |
5002 | 0 | bfd_put_32 (output_bfd, insn, splt->contents); |
5003 | |
|
5004 | 0 | insn = INSN_ABO (INSN_LDQ, 27, 27, 12); |
5005 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 4); |
5006 | |
|
5007 | 0 | insn = INSN_UNOP; |
5008 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 8); |
5009 | |
|
5010 | 0 | insn = INSN_AB (INSN_JMP, 27, 27); |
5011 | 0 | bfd_put_32 (output_bfd, insn, splt->contents + 12); |
5012 | | |
5013 | | /* The next two words will be filled in by ld.so. */ |
5014 | 0 | bfd_put_64 (output_bfd, 0, splt->contents + 16); |
5015 | 0 | bfd_put_64 (output_bfd, 0, splt->contents + 24); |
5016 | 0 | } |
5017 | |
|
5018 | 0 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0; |
5019 | 0 | } |
5020 | 0 | } |
5021 | | |
5022 | 0 | return true; |
5023 | 0 | } |
5024 | | |
5025 | | /* We need to use a special link routine to handle the .mdebug section. |
5026 | | We need to merge all instances of these sections together, not write |
5027 | | them all out sequentially. */ |
5028 | | |
5029 | | static bool |
5030 | | elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info) |
5031 | 0 | { |
5032 | 0 | asection *o; |
5033 | 0 | struct bfd_link_order *p; |
5034 | 0 | asection *mdebug_sec; |
5035 | 0 | struct ecoff_debug_info debug; |
5036 | 0 | const struct ecoff_debug_swap *swap |
5037 | 0 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
5038 | 0 | HDRR *symhdr = &debug.symbolic_header; |
5039 | 0 | void * mdebug_handle = NULL; |
5040 | 0 | struct alpha_elf_link_hash_table * htab; |
5041 | |
|
5042 | 0 | htab = alpha_elf_hash_table (info); |
5043 | 0 | if (htab == NULL) |
5044 | 0 | return false; |
5045 | | |
5046 | | /* Go through the sections and collect the mdebug information. */ |
5047 | 0 | mdebug_sec = NULL; |
5048 | 0 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
5049 | 0 | { |
5050 | 0 | if (strcmp (o->name, ".mdebug") == 0) |
5051 | 0 | { |
5052 | 0 | struct extsym_info einfo; |
5053 | | |
5054 | | /* We have found the .mdebug section in the output file. |
5055 | | Look through all the link_orders comprising it and merge |
5056 | | the information together. */ |
5057 | 0 | symhdr->magic = swap->sym_magic; |
5058 | | /* FIXME: What should the version stamp be? */ |
5059 | 0 | symhdr->vstamp = 0; |
5060 | 0 | symhdr->ilineMax = 0; |
5061 | 0 | symhdr->cbLine = 0; |
5062 | 0 | symhdr->idnMax = 0; |
5063 | 0 | symhdr->ipdMax = 0; |
5064 | 0 | symhdr->isymMax = 0; |
5065 | 0 | symhdr->ioptMax = 0; |
5066 | 0 | symhdr->iauxMax = 0; |
5067 | 0 | symhdr->issMax = 0; |
5068 | 0 | symhdr->issExtMax = 0; |
5069 | 0 | symhdr->ifdMax = 0; |
5070 | 0 | symhdr->crfd = 0; |
5071 | 0 | symhdr->iextMax = 0; |
5072 | | |
5073 | | /* We accumulate the debugging information itself in the |
5074 | | debug_info structure. */ |
5075 | 0 | debug.line = NULL; |
5076 | 0 | debug.external_dnr = NULL; |
5077 | 0 | debug.external_pdr = NULL; |
5078 | 0 | debug.external_sym = NULL; |
5079 | 0 | debug.external_opt = NULL; |
5080 | 0 | debug.external_aux = NULL; |
5081 | 0 | debug.ss = NULL; |
5082 | 0 | debug.ssext = debug.ssext_end = NULL; |
5083 | 0 | debug.external_fdr = NULL; |
5084 | 0 | debug.external_rfd = NULL; |
5085 | 0 | debug.external_ext = debug.external_ext_end = NULL; |
5086 | |
|
5087 | 0 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
5088 | 0 | if (mdebug_handle == NULL) |
5089 | 0 | return false; |
5090 | | |
5091 | 0 | if (1) |
5092 | 0 | { |
5093 | 0 | asection *s; |
5094 | 0 | EXTR esym; |
5095 | 0 | bfd_vma last = 0; |
5096 | 0 | unsigned int i; |
5097 | 0 | static const char * const name[] = |
5098 | 0 | { |
5099 | 0 | ".text", ".init", ".fini", ".data", |
5100 | 0 | ".rodata", ".sdata", ".sbss", ".bss" |
5101 | 0 | }; |
5102 | 0 | static const int sc[] = { scText, scInit, scFini, scData, |
5103 | 0 | scRData, scSData, scSBss, scBss }; |
5104 | |
|
5105 | 0 | esym.jmptbl = 0; |
5106 | 0 | esym.cobol_main = 0; |
5107 | 0 | esym.weakext = 0; |
5108 | 0 | esym.reserved = 0; |
5109 | 0 | esym.ifd = ifdNil; |
5110 | 0 | esym.asym.iss = issNil; |
5111 | 0 | esym.asym.st = stLocal; |
5112 | 0 | esym.asym.reserved = 0; |
5113 | 0 | esym.asym.index = indexNil; |
5114 | 0 | for (i = 0; i < 8; i++) |
5115 | 0 | { |
5116 | 0 | esym.asym.sc = sc[i]; |
5117 | 0 | s = bfd_get_section_by_name (abfd, name[i]); |
5118 | 0 | if (s != NULL) |
5119 | 0 | { |
5120 | 0 | esym.asym.value = s->vma; |
5121 | 0 | last = s->vma + s->size; |
5122 | 0 | } |
5123 | 0 | else |
5124 | 0 | esym.asym.value = last; |
5125 | |
|
5126 | 0 | if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, |
5127 | 0 | name[i], &esym)) |
5128 | 0 | return false; |
5129 | 0 | } |
5130 | 0 | } |
5131 | | |
5132 | 0 | for (p = o->map_head.link_order; |
5133 | 0 | p != (struct bfd_link_order *) NULL; |
5134 | 0 | p = p->next) |
5135 | 0 | { |
5136 | 0 | asection *input_section; |
5137 | 0 | bfd *input_bfd; |
5138 | 0 | const struct ecoff_debug_swap *input_swap; |
5139 | 0 | struct ecoff_debug_info input_debug; |
5140 | 0 | char *eraw_src; |
5141 | 0 | char *eraw_end; |
5142 | |
|
5143 | 0 | if (p->type != bfd_indirect_link_order) |
5144 | 0 | { |
5145 | 0 | if (p->type == bfd_data_link_order) |
5146 | 0 | continue; |
5147 | 0 | abort (); |
5148 | 0 | } |
5149 | | |
5150 | 0 | input_section = p->u.indirect.section; |
5151 | 0 | input_bfd = input_section->owner; |
5152 | |
|
5153 | 0 | if (! is_alpha_elf (input_bfd)) |
5154 | | /* I don't know what a non ALPHA ELF bfd would be |
5155 | | doing with a .mdebug section, but I don't really |
5156 | | want to deal with it. */ |
5157 | 0 | continue; |
5158 | | |
5159 | 0 | input_swap = (get_elf_backend_data (input_bfd) |
5160 | 0 | ->elf_backend_ecoff_debug_swap); |
5161 | |
|
5162 | 0 | BFD_ASSERT (p->size == input_section->size); |
5163 | | |
5164 | | /* The ECOFF linking code expects that we have already |
5165 | | read in the debugging information and set up an |
5166 | | ecoff_debug_info structure, so we do that now. */ |
5167 | 0 | if (!elf64_alpha_read_ecoff_info (input_bfd, input_section, |
5168 | 0 | &input_debug)) |
5169 | 0 | return false; |
5170 | | |
5171 | 0 | if (! (bfd_ecoff_debug_accumulate |
5172 | 0 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
5173 | 0 | &input_debug, input_swap, info))) |
5174 | 0 | return false; |
5175 | | |
5176 | | /* Loop through the external symbols. For each one with |
5177 | | interesting information, try to find the symbol in |
5178 | | the linker global hash table and save the information |
5179 | | for the output external symbols. */ |
5180 | 0 | eraw_src = (char *) input_debug.external_ext; |
5181 | 0 | eraw_end = (eraw_src |
5182 | 0 | + (input_debug.symbolic_header.iextMax |
5183 | 0 | * input_swap->external_ext_size)); |
5184 | 0 | for (; |
5185 | 0 | eraw_src < eraw_end; |
5186 | 0 | eraw_src += input_swap->external_ext_size) |
5187 | 0 | { |
5188 | 0 | EXTR ext; |
5189 | 0 | const char *name; |
5190 | 0 | struct alpha_elf_link_hash_entry *h; |
5191 | |
|
5192 | 0 | (*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext); |
5193 | 0 | if (ext.asym.sc == scNil |
5194 | 0 | || ext.asym.sc == scUndefined |
5195 | 0 | || ext.asym.sc == scSUndefined) |
5196 | 0 | continue; |
5197 | | |
5198 | 0 | name = input_debug.ssext + ext.asym.iss; |
5199 | 0 | h = alpha_elf_link_hash_lookup (htab, name, false, false, true); |
5200 | 0 | if (h == NULL || h->esym.ifd != -2) |
5201 | 0 | continue; |
5202 | | |
5203 | 0 | if (ext.ifd != -1) |
5204 | 0 | { |
5205 | 0 | BFD_ASSERT (ext.ifd |
5206 | 0 | < input_debug.symbolic_header.ifdMax); |
5207 | 0 | ext.ifd = input_debug.ifdmap[ext.ifd]; |
5208 | 0 | } |
5209 | |
|
5210 | 0 | h->esym = ext; |
5211 | 0 | } |
5212 | | |
5213 | | /* Free up the information we just read. */ |
5214 | 0 | free (input_debug.line); |
5215 | 0 | free (input_debug.external_dnr); |
5216 | 0 | free (input_debug.external_pdr); |
5217 | 0 | free (input_debug.external_sym); |
5218 | 0 | free (input_debug.external_opt); |
5219 | 0 | free (input_debug.external_aux); |
5220 | 0 | free (input_debug.ss); |
5221 | 0 | free (input_debug.ssext); |
5222 | 0 | free (input_debug.external_fdr); |
5223 | 0 | free (input_debug.external_rfd); |
5224 | 0 | free (input_debug.external_ext); |
5225 | | |
5226 | | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
5227 | | elf_link_input_bfd ignores this section. */ |
5228 | 0 | input_section->flags &=~ SEC_HAS_CONTENTS; |
5229 | 0 | } |
5230 | | |
5231 | | /* Build the external symbol information. */ |
5232 | 0 | einfo.abfd = abfd; |
5233 | 0 | einfo.info = info; |
5234 | 0 | einfo.debug = &debug; |
5235 | 0 | einfo.swap = swap; |
5236 | 0 | einfo.failed = false; |
5237 | 0 | elf_link_hash_traverse (elf_hash_table (info), |
5238 | 0 | elf64_alpha_output_extsym, |
5239 | 0 | &einfo); |
5240 | 0 | if (einfo.failed) |
5241 | 0 | return false; |
5242 | | |
5243 | | /* Set the size of the .mdebug section. */ |
5244 | 0 | o->size = bfd_ecoff_debug_size (abfd, &debug, swap); |
5245 | | |
5246 | | /* Skip this section later on (I don't think this currently |
5247 | | matters, but someday it might). */ |
5248 | 0 | o->map_head.link_order = (struct bfd_link_order *) NULL; |
5249 | |
|
5250 | 0 | mdebug_sec = o; |
5251 | 0 | } |
5252 | 0 | } |
5253 | | |
5254 | | /* Invoke the regular ELF backend linker to do all the work. */ |
5255 | 0 | if (! bfd_elf_final_link (abfd, info)) |
5256 | 0 | return false; |
5257 | | |
5258 | | /* Now write out the computed sections. */ |
5259 | | |
5260 | | /* The .got subsections... */ |
5261 | 0 | { |
5262 | 0 | bfd *i, *dynobj = elf_hash_table(info)->dynobj; |
5263 | 0 | for (i = htab->got_list; |
5264 | 0 | i != NULL; |
5265 | 0 | i = alpha_elf_tdata(i)->got_link_next) |
5266 | 0 | { |
5267 | 0 | asection *sgot; |
5268 | | |
5269 | | /* elf_bfd_final_link already did everything in dynobj. */ |
5270 | 0 | if (i == dynobj) |
5271 | 0 | continue; |
5272 | | |
5273 | 0 | sgot = alpha_elf_tdata(i)->got; |
5274 | 0 | if (! bfd_set_section_contents (abfd, sgot->output_section, |
5275 | 0 | sgot->contents, |
5276 | 0 | (file_ptr) sgot->output_offset, |
5277 | 0 | sgot->size)) |
5278 | 0 | return false; |
5279 | 0 | } |
5280 | 0 | } |
5281 | | |
5282 | 0 | if (mdebug_sec != (asection *) NULL) |
5283 | 0 | { |
5284 | 0 | BFD_ASSERT (abfd->output_has_begun); |
5285 | 0 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, |
5286 | 0 | swap, info, |
5287 | 0 | mdebug_sec->filepos)) |
5288 | 0 | return false; |
5289 | | |
5290 | 0 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); |
5291 | 0 | } |
5292 | | |
5293 | 0 | return true; |
5294 | 0 | } |
5295 | | |
5296 | | static enum elf_reloc_type_class |
5297 | | elf64_alpha_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
5298 | | const asection *rel_sec ATTRIBUTE_UNUSED, |
5299 | | const Elf_Internal_Rela *rela) |
5300 | 0 | { |
5301 | 0 | switch ((int) ELF64_R_TYPE (rela->r_info)) |
5302 | 0 | { |
5303 | 0 | case R_ALPHA_RELATIVE: |
5304 | 0 | return reloc_class_relative; |
5305 | 0 | case R_ALPHA_JMP_SLOT: |
5306 | 0 | return reloc_class_plt; |
5307 | 0 | case R_ALPHA_COPY: |
5308 | 0 | return reloc_class_copy; |
5309 | 0 | default: |
5310 | 0 | return reloc_class_normal; |
5311 | 0 | } |
5312 | 0 | } |
5313 | | |
5314 | | static const struct bfd_elf_special_section elf64_alpha_special_sections[] = |
5315 | | { |
5316 | | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, |
5317 | | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, |
5318 | | { NULL, 0, 0, 0, 0 } |
5319 | | }; |
5320 | | |
5321 | | /* ECOFF swapping routines. These are used when dealing with the |
5322 | | .mdebug section, which is in the ECOFF debugging format. Copied |
5323 | | from elf32-mips.c. */ |
5324 | | static const struct ecoff_debug_swap |
5325 | | elf64_alpha_ecoff_debug_swap = |
5326 | | { |
5327 | | /* Symbol table magic number. */ |
5328 | | magicSym2, |
5329 | | /* Alignment of debugging information. E.g., 4. */ |
5330 | | 8, |
5331 | | /* Sizes of external symbolic information. */ |
5332 | | sizeof (struct hdr_ext), |
5333 | | sizeof (struct dnr_ext), |
5334 | | sizeof (struct pdr_ext), |
5335 | | sizeof (struct sym_ext), |
5336 | | sizeof (struct opt_ext), |
5337 | | sizeof (struct fdr_ext), |
5338 | | sizeof (struct rfd_ext), |
5339 | | sizeof (struct ext_ext), |
5340 | | /* Functions to swap in external symbolic data. */ |
5341 | | ecoff_swap_hdr_in, |
5342 | | ecoff_swap_dnr_in, |
5343 | | ecoff_swap_pdr_in, |
5344 | | ecoff_swap_sym_in, |
5345 | | ecoff_swap_opt_in, |
5346 | | ecoff_swap_fdr_in, |
5347 | | ecoff_swap_rfd_in, |
5348 | | ecoff_swap_ext_in, |
5349 | | _bfd_ecoff_swap_tir_in, |
5350 | | _bfd_ecoff_swap_rndx_in, |
5351 | | /* Functions to swap out external symbolic data. */ |
5352 | | ecoff_swap_hdr_out, |
5353 | | ecoff_swap_dnr_out, |
5354 | | ecoff_swap_pdr_out, |
5355 | | ecoff_swap_sym_out, |
5356 | | ecoff_swap_opt_out, |
5357 | | ecoff_swap_fdr_out, |
5358 | | ecoff_swap_rfd_out, |
5359 | | ecoff_swap_ext_out, |
5360 | | _bfd_ecoff_swap_tir_out, |
5361 | | _bfd_ecoff_swap_rndx_out, |
5362 | | /* Function to read in symbolic data. */ |
5363 | | elf64_alpha_read_ecoff_info |
5364 | | }; |
5365 | | |
5366 | | /* Use a non-standard hash bucket size of 8. */ |
5367 | | |
5368 | | static const struct elf_size_info alpha_elf_size_info = |
5369 | | { |
5370 | | sizeof (Elf64_External_Ehdr), |
5371 | | sizeof (Elf64_External_Phdr), |
5372 | | sizeof (Elf64_External_Shdr), |
5373 | | sizeof (Elf64_External_Rel), |
5374 | | sizeof (Elf64_External_Rela), |
5375 | | sizeof (Elf64_External_Sym), |
5376 | | sizeof (Elf64_External_Dyn), |
5377 | | sizeof (Elf_External_Note), |
5378 | | 8, |
5379 | | 1, |
5380 | | 64, 3, |
5381 | | ELFCLASS64, EV_CURRENT, |
5382 | | bfd_elf64_write_out_phdrs, |
5383 | | bfd_elf64_write_shdrs_and_ehdr, |
5384 | | bfd_elf64_checksum_contents, |
5385 | | bfd_elf64_write_relocs, |
5386 | | bfd_elf64_swap_symbol_in, |
5387 | | bfd_elf64_swap_symbol_out, |
5388 | | bfd_elf64_slurp_reloc_table, |
5389 | | bfd_elf64_slurp_symbol_table, |
5390 | | bfd_elf64_swap_dyn_in, |
5391 | | bfd_elf64_swap_dyn_out, |
5392 | | bfd_elf64_swap_reloc_in, |
5393 | | bfd_elf64_swap_reloc_out, |
5394 | | bfd_elf64_swap_reloca_in, |
5395 | | bfd_elf64_swap_reloca_out |
5396 | | }; |
5397 | | |
5398 | | #define TARGET_LITTLE_SYM alpha_elf64_vec |
5399 | | #define TARGET_LITTLE_NAME "elf64-alpha" |
5400 | | #define ELF_ARCH bfd_arch_alpha |
5401 | | #define ELF_TARGET_ID ALPHA_ELF_DATA |
5402 | | #define ELF_MACHINE_CODE EM_ALPHA |
5403 | | #define ELF_MAXPAGESIZE 0x10000 |
5404 | | #define ELF_COMMONPAGESIZE 0x2000 |
5405 | | |
5406 | | #define bfd_elf64_bfd_link_hash_table_create \ |
5407 | | elf64_alpha_bfd_link_hash_table_create |
5408 | | |
5409 | | #define bfd_elf64_bfd_reloc_type_lookup \ |
5410 | | elf64_alpha_bfd_reloc_type_lookup |
5411 | | #define bfd_elf64_bfd_reloc_name_lookup \ |
5412 | | elf64_alpha_bfd_reloc_name_lookup |
5413 | | #define elf_info_to_howto \ |
5414 | | elf64_alpha_info_to_howto |
5415 | | |
5416 | | #define bfd_elf64_mkobject \ |
5417 | | elf64_alpha_mkobject |
5418 | | #define elf_backend_object_p \ |
5419 | | elf64_alpha_object_p |
5420 | | |
5421 | | #define elf_backend_section_from_shdr \ |
5422 | | elf64_alpha_section_from_shdr |
5423 | | #define elf_backend_section_flags \ |
5424 | | elf64_alpha_section_flags |
5425 | | #define elf_backend_fake_sections \ |
5426 | | elf64_alpha_fake_sections |
5427 | | |
5428 | | #define bfd_elf64_bfd_is_local_label_name \ |
5429 | | elf64_alpha_is_local_label_name |
5430 | | #define bfd_elf64_find_nearest_line \ |
5431 | | elf64_alpha_find_nearest_line |
5432 | | #define bfd_elf64_bfd_relax_section \ |
5433 | | elf64_alpha_relax_section |
5434 | | |
5435 | | #define elf_backend_add_symbol_hook \ |
5436 | | elf64_alpha_add_symbol_hook |
5437 | | #define elf_backend_relocs_compatible \ |
5438 | | _bfd_elf_relocs_compatible |
5439 | | #define elf_backend_sort_relocs_p \ |
5440 | | elf64_alpha_sort_relocs_p |
5441 | | #define elf_backend_check_relocs \ |
5442 | | elf64_alpha_check_relocs |
5443 | | #define elf_backend_create_dynamic_sections \ |
5444 | | elf64_alpha_create_dynamic_sections |
5445 | | #define elf_backend_adjust_dynamic_symbol \ |
5446 | | elf64_alpha_adjust_dynamic_symbol |
5447 | | #define elf_backend_merge_symbol_attribute \ |
5448 | | elf64_alpha_merge_symbol_attribute |
5449 | | #define elf_backend_copy_indirect_symbol \ |
5450 | | elf64_alpha_copy_indirect_symbol |
5451 | | #define elf_backend_always_size_sections \ |
5452 | | elf64_alpha_always_size_sections |
5453 | | #define elf_backend_size_dynamic_sections \ |
5454 | | elf64_alpha_size_dynamic_sections |
5455 | | #define elf_backend_omit_section_dynsym \ |
5456 | | _bfd_elf_omit_section_dynsym_all |
5457 | | #define elf_backend_relocate_section \ |
5458 | | elf64_alpha_relocate_section |
5459 | | #define elf_backend_finish_dynamic_symbol \ |
5460 | | elf64_alpha_finish_dynamic_symbol |
5461 | | #define elf_backend_finish_dynamic_sections \ |
5462 | | elf64_alpha_finish_dynamic_sections |
5463 | | #define bfd_elf64_bfd_final_link \ |
5464 | | elf64_alpha_final_link |
5465 | | #define elf_backend_reloc_type_class \ |
5466 | | elf64_alpha_reloc_type_class |
5467 | | |
5468 | | #define elf_backend_can_gc_sections 1 |
5469 | | #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook |
5470 | | |
5471 | | #define elf_backend_ecoff_debug_swap \ |
5472 | | &elf64_alpha_ecoff_debug_swap |
5473 | | |
5474 | | #define elf_backend_size_info \ |
5475 | | alpha_elf_size_info |
5476 | | |
5477 | | #define elf_backend_special_sections \ |
5478 | | elf64_alpha_special_sections |
5479 | | |
5480 | | #define elf_backend_strip_zero_sized_dynamic_sections \ |
5481 | | _bfd_elf_strip_zero_sized_dynamic_sections |
5482 | | |
5483 | | /* A few constants that determine how the .plt section is set up. */ |
5484 | | #define elf_backend_want_got_plt 0 |
5485 | | #define elf_backend_plt_readonly 0 |
5486 | | #define elf_backend_want_plt_sym 1 |
5487 | | #define elf_backend_got_header_size 0 |
5488 | | #define elf_backend_dtrel_excludes_plt 1 |
5489 | | |
5490 | | #include "elf64-target.h" |
5491 | | |
5492 | | /* FreeBSD support. */ |
5493 | | |
5494 | | #undef TARGET_LITTLE_SYM |
5495 | | #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec |
5496 | | #undef TARGET_LITTLE_NAME |
5497 | | #define TARGET_LITTLE_NAME "elf64-alpha-freebsd" |
5498 | | #undef ELF_OSABI |
5499 | | #define ELF_OSABI ELFOSABI_FREEBSD |
5500 | | |
5501 | | /* The kernel recognizes executables as valid only if they carry a |
5502 | | "FreeBSD" label in the ELF header. So we put this label on all |
5503 | | executables and (for simplicity) also all other object files. */ |
5504 | | |
5505 | | static bool |
5506 | | elf64_alpha_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info) |
5507 | 0 | { |
5508 | 0 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
5509 | |
|
5510 | 0 | if (!_bfd_elf_init_file_header (abfd, info)) |
5511 | 0 | return false; |
5512 | | |
5513 | 0 | i_ehdrp = elf_elfheader (abfd); |
5514 | | |
5515 | | /* Put an ABI label supported by FreeBSD >= 4.1. */ |
5516 | 0 | i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; |
5517 | | #ifdef OLD_FREEBSD_ABI_LABEL |
5518 | | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ |
5519 | | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); |
5520 | | #endif |
5521 | 0 | return true; |
5522 | 0 | } |
5523 | | |
5524 | | #undef elf_backend_init_file_header |
5525 | | #define elf_backend_init_file_header \ |
5526 | | elf64_alpha_fbsd_init_file_header |
5527 | | |
5528 | | #undef elf64_bed |
5529 | | #define elf64_bed elf64_alpha_fbsd_bed |
5530 | | |
5531 | | #include "elf64-target.h" |