Oops - fix typos and finish of ISO-C90'fication of ieee.c
[binutils.git] / bfd / elf64-alpha.c
blob966563c935af9f51adda7aaefd88e31dca4e502b
1 /* Alpha specific support for 64-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Contributed by Richard Henderson <rth@tamu.edu>.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 /* We need a published ABI spec for this. Until one comes out, don't
23 assume this'll remain unchanged forever. */
25 #include "bfd.h"
26 #include "sysdep.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
30 #include "elf/alpha.h"
32 #define ALPHAECOFF
34 #define NO_COFF_RELOCS
35 #define NO_COFF_SYMBOLS
36 #define NO_COFF_LINENOS
38 /* Get the ECOFF swapping routines. Needed for the debug information. */
39 #include "coff/internal.h"
40 #include "coff/sym.h"
41 #include "coff/symconst.h"
42 #include "coff/ecoff.h"
43 #include "coff/alpha.h"
44 #include "aout/ar.h"
45 #include "libcoff.h"
46 #include "libecoff.h"
47 #define ECOFF_64
48 #include "ecoffswap.h"
50 static bfd_boolean alpha_elf_dynamic_symbol_p
51 PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *));
52 static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc
53 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
54 static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create
55 PARAMS ((bfd *));
57 static bfd_reloc_status_type elf64_alpha_reloc_nil
58 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
59 static bfd_reloc_status_type elf64_alpha_reloc_bad
60 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
61 static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp
62 PARAMS ((bfd *, bfd_vma, bfd_byte *, bfd_byte *));
63 static bfd_reloc_status_type elf64_alpha_reloc_gpdisp
64 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
66 static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup
67 PARAMS ((bfd *, bfd_reloc_code_real_type));
68 static void elf64_alpha_info_to_howto
69 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
71 static bfd_boolean elf64_alpha_mkobject
72 PARAMS ((bfd *));
73 static bfd_boolean elf64_alpha_object_p
74 PARAMS ((bfd *));
75 static bfd_boolean elf64_alpha_section_flags
76 PARAMS ((flagword *, const Elf_Internal_Shdr *));
77 static bfd_boolean elf64_alpha_fake_sections
78 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
79 static bfd_boolean elf64_alpha_create_got_section
80 PARAMS ((bfd *, struct bfd_link_info *));
81 static bfd_boolean elf64_alpha_create_dynamic_sections
82 PARAMS ((bfd *, struct bfd_link_info *));
84 static bfd_boolean elf64_alpha_read_ecoff_info
85 PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
86 static bfd_boolean elf64_alpha_is_local_label_name
87 PARAMS ((bfd *, const char *));
88 static bfd_boolean elf64_alpha_find_nearest_line
89 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
90 const char **, unsigned int *));
92 #if defined(__STDC__) || defined(ALMOST_STDC)
93 struct alpha_elf_link_hash_entry;
94 #endif
96 static bfd_boolean elf64_alpha_output_extsym
97 PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
99 static bfd_boolean elf64_alpha_can_merge_gots
100 PARAMS ((bfd *, bfd *));
101 static void elf64_alpha_merge_gots
102 PARAMS ((bfd *, bfd *));
103 static bfd_boolean elf64_alpha_calc_got_offsets_for_symbol
104 PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
105 static void elf64_alpha_calc_got_offsets
106 PARAMS ((struct bfd_link_info *));
107 static bfd_boolean elf64_alpha_size_got_sections
108 PARAMS ((struct bfd_link_info *));
109 static bfd_boolean elf64_alpha_size_plt_section
110 PARAMS ((struct bfd_link_info *));
111 static bfd_boolean elf64_alpha_size_plt_section_1
112 PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
113 static bfd_boolean elf64_alpha_always_size_sections
114 PARAMS ((bfd *, struct bfd_link_info *));
115 static int alpha_dynamic_entries_for_reloc
116 PARAMS ((int, int, int));
117 static bfd_boolean elf64_alpha_calc_dynrel_sizes
118 PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
119 static bfd_boolean elf64_alpha_size_rela_got_section
120 PARAMS ((struct bfd_link_info *));
121 static bfd_boolean elf64_alpha_size_rela_got_1
122 PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
123 static bfd_boolean elf64_alpha_add_symbol_hook
124 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
125 const char **, flagword *, asection **, bfd_vma *));
126 static struct alpha_elf_got_entry *get_got_entry
127 PARAMS ((bfd *, struct alpha_elf_link_hash_entry *, unsigned long,
128 unsigned long, bfd_vma));
129 static bfd_boolean elf64_alpha_check_relocs
130 PARAMS ((bfd *, struct bfd_link_info *, asection *sec,
131 const Elf_Internal_Rela *));
132 static bfd_boolean elf64_alpha_adjust_dynamic_symbol
133 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
134 static bfd_boolean elf64_alpha_size_dynamic_sections
135 PARAMS ((bfd *, struct bfd_link_info *));
136 static void elf64_alpha_emit_dynrel
137 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *,
138 bfd_vma, long, long, bfd_vma));
139 static bfd_boolean elf64_alpha_relocate_section_r
140 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
141 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
142 static bfd_boolean elf64_alpha_relocate_section
143 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
144 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
145 static bfd_boolean elf64_alpha_finish_dynamic_symbol
146 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
147 Elf_Internal_Sym *));
148 static bfd_boolean elf64_alpha_finish_dynamic_sections
149 PARAMS ((bfd *, struct bfd_link_info *));
150 static bfd_boolean elf64_alpha_final_link
151 PARAMS ((bfd *, struct bfd_link_info *));
152 static bfd_boolean elf64_alpha_merge_ind_symbols
153 PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
154 static Elf_Internal_Rela * elf64_alpha_find_reloc_at_ofs
155 PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma, int));
156 static enum elf_reloc_type_class elf64_alpha_reloc_type_class
157 PARAMS ((const Elf_Internal_Rela *));
159 struct alpha_elf_link_hash_entry
161 struct elf_link_hash_entry root;
163 /* External symbol information. */
164 EXTR esym;
166 /* Cumulative flags for all the .got entries. */
167 int flags;
169 /* Contexts in which a literal was referenced. */
170 #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
171 #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
172 #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
173 #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
174 #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
175 #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
176 #define ALPHA_ELF_LINK_HASH_LU_FUNC 0x38
177 #define ALPHA_ELF_LINK_HASH_TLS_IE 0x40
178 #define ALPHA_ELF_LINK_HASH_PLT_LOC 0x80
180 /* Used to undo the localization of a plt symbol. */
181 asection *plt_old_section;
182 bfd_vma plt_old_value;
184 /* Used to implement multiple .got subsections. */
185 struct alpha_elf_got_entry
187 struct alpha_elf_got_entry *next;
189 /* Which .got subsection? */
190 bfd *gotobj;
192 /* The addend in effect for this entry. */
193 bfd_vma addend;
195 /* The .got offset for this entry. */
196 int got_offset;
198 /* How many references to this entry? */
199 int use_count;
201 /* The relocation type of this entry. */
202 unsigned char reloc_type;
204 /* How a LITERAL is used. */
205 unsigned char flags;
207 /* Have we initialized the dynamic relocation for this entry? */
208 unsigned char reloc_done;
210 /* Have we adjusted this entry for SEC_MERGE? */
211 unsigned char reloc_xlated;
212 } *got_entries;
214 /* Used to count non-got, non-plt relocations for delayed sizing
215 of relocation sections. */
216 struct alpha_elf_reloc_entry
218 struct alpha_elf_reloc_entry *next;
220 /* Which .reloc section? */
221 asection *srel;
223 /* What kind of relocation? */
224 unsigned int rtype;
226 /* Is this against read-only section? */
227 unsigned int reltext : 1;
229 /* How many did we find? */
230 unsigned long count;
231 } *reloc_entries;
234 /* Alpha ELF linker hash table. */
236 struct alpha_elf_link_hash_table
238 struct elf_link_hash_table root;
240 /* The head of a list of .got subsections linked through
241 alpha_elf_tdata(abfd)->got_link_next. */
242 bfd *got_list;
245 /* Look up an entry in a Alpha ELF linker hash table. */
247 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
248 ((struct alpha_elf_link_hash_entry *) \
249 elf_link_hash_lookup (&(table)->root, (string), (create), \
250 (copy), (follow)))
252 /* Traverse a Alpha ELF linker hash table. */
254 #define alpha_elf_link_hash_traverse(table, func, info) \
255 (elf_link_hash_traverse \
256 (&(table)->root, \
257 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
258 (info)))
260 /* Get the Alpha ELF linker hash table from a link_info structure. */
262 #define alpha_elf_hash_table(p) \
263 ((struct alpha_elf_link_hash_table *) ((p)->hash))
265 /* Get the object's symbols as our own entry type. */
267 #define alpha_elf_sym_hashes(abfd) \
268 ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
270 /* Should we do dynamic things to this symbol? This differs from the
271 generic version in that we never need to consider function pointer
272 equality wrt PLT entries -- we don't create a PLT entry if a symbol's
273 address is ever taken. */
275 static inline bfd_boolean
276 alpha_elf_dynamic_symbol_p (h, info)
277 struct elf_link_hash_entry *h;
278 struct bfd_link_info *info;
280 return _bfd_elf_dynamic_symbol_p (h, info, 0);
283 /* Create an entry in a Alpha ELF linker hash table. */
285 static struct bfd_hash_entry *
286 elf64_alpha_link_hash_newfunc (entry, table, string)
287 struct bfd_hash_entry *entry;
288 struct bfd_hash_table *table;
289 const char *string;
291 struct alpha_elf_link_hash_entry *ret =
292 (struct alpha_elf_link_hash_entry *) entry;
294 /* Allocate the structure if it has not already been allocated by a
295 subclass. */
296 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
297 ret = ((struct alpha_elf_link_hash_entry *)
298 bfd_hash_allocate (table,
299 sizeof (struct alpha_elf_link_hash_entry)));
300 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
301 return (struct bfd_hash_entry *) ret;
303 /* Call the allocation method of the superclass. */
304 ret = ((struct alpha_elf_link_hash_entry *)
305 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
306 table, string));
307 if (ret != (struct alpha_elf_link_hash_entry *) NULL)
309 /* Set local fields. */
310 memset (&ret->esym, 0, sizeof (EXTR));
311 /* We use -2 as a marker to indicate that the information has
312 not been set. -1 means there is no associated ifd. */
313 ret->esym.ifd = -2;
314 ret->flags = 0;
315 ret->got_entries = NULL;
316 ret->reloc_entries = NULL;
319 return (struct bfd_hash_entry *) ret;
322 /* Create a Alpha ELF linker hash table. */
324 static struct bfd_link_hash_table *
325 elf64_alpha_bfd_link_hash_table_create (abfd)
326 bfd *abfd;
328 struct alpha_elf_link_hash_table *ret;
329 bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table);
331 ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt);
332 if (ret == (struct alpha_elf_link_hash_table *) NULL)
333 return NULL;
335 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
336 elf64_alpha_link_hash_newfunc))
338 free (ret);
339 return NULL;
342 return &ret->root.root;
345 /* We have some private fields hanging off of the elf_tdata structure. */
347 struct alpha_elf_obj_tdata
349 struct elf_obj_tdata root;
351 /* For every input file, these are the got entries for that object's
352 local symbols. */
353 struct alpha_elf_got_entry ** local_got_entries;
355 /* For every input file, this is the object that owns the got that
356 this input file uses. */
357 bfd *gotobj;
359 /* For every got, this is a linked list through the objects using this got */
360 bfd *in_got_link_next;
362 /* For every got, this is a link to the next got subsegment. */
363 bfd *got_link_next;
365 /* For every got, this is the section. */
366 asection *got;
368 /* For every got, this is it's total number of words. */
369 int total_got_size;
371 /* For every got, this is the sum of the number of words required
372 to hold all of the member object's local got. */
373 int local_got_size;
376 #define alpha_elf_tdata(abfd) \
377 ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
379 static bfd_boolean
380 elf64_alpha_mkobject (abfd)
381 bfd *abfd;
383 bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata);
384 abfd->tdata.any = bfd_zalloc (abfd, amt);
385 if (abfd->tdata.any == NULL)
386 return FALSE;
387 return TRUE;
390 static bfd_boolean
391 elf64_alpha_object_p (abfd)
392 bfd *abfd;
394 /* Set the right machine number for an Alpha ELF file. */
395 return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
398 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
399 from smaller values. Start with zero, widen, *then* decrement. */
400 #define MINUS_ONE (((bfd_vma)0) - 1)
402 #define SKIP_HOWTO(N) \
403 HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
405 static reloc_howto_type elf64_alpha_howto_table[] =
407 HOWTO (R_ALPHA_NONE, /* type */
408 0, /* rightshift */
409 0, /* size (0 = byte, 1 = short, 2 = long) */
410 8, /* bitsize */
411 TRUE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_dont, /* complain_on_overflow */
414 elf64_alpha_reloc_nil, /* special_function */
415 "NONE", /* name */
416 FALSE, /* partial_inplace */
417 0, /* src_mask */
418 0, /* dst_mask */
419 TRUE), /* pcrel_offset */
421 /* A 32 bit reference to a symbol. */
422 HOWTO (R_ALPHA_REFLONG, /* type */
423 0, /* rightshift */
424 2, /* size (0 = byte, 1 = short, 2 = long) */
425 32, /* bitsize */
426 FALSE, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_bitfield, /* complain_on_overflow */
429 0, /* special_function */
430 "REFLONG", /* name */
431 FALSE, /* partial_inplace */
432 0xffffffff, /* src_mask */
433 0xffffffff, /* dst_mask */
434 FALSE), /* pcrel_offset */
436 /* A 64 bit reference to a symbol. */
437 HOWTO (R_ALPHA_REFQUAD, /* type */
438 0, /* rightshift */
439 4, /* size (0 = byte, 1 = short, 2 = long) */
440 64, /* bitsize */
441 FALSE, /* pc_relative */
442 0, /* bitpos */
443 complain_overflow_bitfield, /* complain_on_overflow */
444 0, /* special_function */
445 "REFQUAD", /* name */
446 FALSE, /* partial_inplace */
447 MINUS_ONE, /* src_mask */
448 MINUS_ONE, /* dst_mask */
449 FALSE), /* pcrel_offset */
451 /* A 32 bit GP relative offset. This is just like REFLONG except
452 that when the value is used the value of the gp register will be
453 added in. */
454 HOWTO (R_ALPHA_GPREL32, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 0, /* special_function */
462 "GPREL32", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
468 /* Used for an instruction that refers to memory off the GP register. */
469 HOWTO (R_ALPHA_LITERAL, /* type */
470 0, /* rightshift */
471 1, /* size (0 = byte, 1 = short, 2 = long) */
472 16, /* bitsize */
473 FALSE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_signed, /* complain_on_overflow */
476 0, /* special_function */
477 "ELF_LITERAL", /* name */
478 FALSE, /* partial_inplace */
479 0xffff, /* src_mask */
480 0xffff, /* dst_mask */
481 FALSE), /* pcrel_offset */
483 /* This reloc only appears immediately following an ELF_LITERAL reloc.
484 It identifies a use of the literal. The symbol index is special:
485 1 means the literal address is in the base register of a memory
486 format instruction; 2 means the literal address is in the byte
487 offset register of a byte-manipulation instruction; 3 means the
488 literal address is in the target register of a jsr instruction.
489 This does not actually do any relocation. */
490 HOWTO (R_ALPHA_LITUSE, /* type */
491 0, /* rightshift */
492 1, /* size (0 = byte, 1 = short, 2 = long) */
493 32, /* bitsize */
494 FALSE, /* pc_relative */
495 0, /* bitpos */
496 complain_overflow_dont, /* complain_on_overflow */
497 elf64_alpha_reloc_nil, /* special_function */
498 "LITUSE", /* name */
499 FALSE, /* partial_inplace */
500 0, /* src_mask */
501 0, /* dst_mask */
502 FALSE), /* pcrel_offset */
504 /* Load the gp register. This is always used for a ldah instruction
505 which loads the upper 16 bits of the gp register. The symbol
506 index of the GPDISP instruction is an offset in bytes to the lda
507 instruction that loads the lower 16 bits. The value to use for
508 the relocation is the difference between the GP value and the
509 current location; the load will always be done against a register
510 holding the current address.
512 NOTE: Unlike ECOFF, partial in-place relocation is not done. If
513 any offset is present in the instructions, it is an offset from
514 the register to the ldah instruction. This lets us avoid any
515 stupid hackery like inventing a gp value to do partial relocation
516 against. Also unlike ECOFF, we do the whole relocation off of
517 the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
518 space consuming bit, that, since all the information was present
519 in the GPDISP_HI16 reloc. */
520 HOWTO (R_ALPHA_GPDISP, /* type */
521 16, /* rightshift */
522 2, /* size (0 = byte, 1 = short, 2 = long) */
523 16, /* bitsize */
524 FALSE, /* pc_relative */
525 0, /* bitpos */
526 complain_overflow_dont, /* complain_on_overflow */
527 elf64_alpha_reloc_gpdisp, /* special_function */
528 "GPDISP", /* name */
529 FALSE, /* partial_inplace */
530 0xffff, /* src_mask */
531 0xffff, /* dst_mask */
532 TRUE), /* pcrel_offset */
534 /* A 21 bit branch. */
535 HOWTO (R_ALPHA_BRADDR, /* type */
536 2, /* rightshift */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
538 21, /* bitsize */
539 TRUE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_signed, /* complain_on_overflow */
542 0, /* special_function */
543 "BRADDR", /* name */
544 FALSE, /* partial_inplace */
545 0x1fffff, /* src_mask */
546 0x1fffff, /* dst_mask */
547 TRUE), /* pcrel_offset */
549 /* A hint for a jump to a register. */
550 HOWTO (R_ALPHA_HINT, /* type */
551 2, /* rightshift */
552 1, /* size (0 = byte, 1 = short, 2 = long) */
553 14, /* bitsize */
554 TRUE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_dont, /* complain_on_overflow */
557 0, /* special_function */
558 "HINT", /* name */
559 FALSE, /* partial_inplace */
560 0x3fff, /* src_mask */
561 0x3fff, /* dst_mask */
562 TRUE), /* pcrel_offset */
564 /* 16 bit PC relative offset. */
565 HOWTO (R_ALPHA_SREL16, /* type */
566 0, /* rightshift */
567 1, /* size (0 = byte, 1 = short, 2 = long) */
568 16, /* bitsize */
569 TRUE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_signed, /* complain_on_overflow */
572 0, /* special_function */
573 "SREL16", /* name */
574 FALSE, /* partial_inplace */
575 0xffff, /* src_mask */
576 0xffff, /* dst_mask */
577 TRUE), /* pcrel_offset */
579 /* 32 bit PC relative offset. */
580 HOWTO (R_ALPHA_SREL32, /* type */
581 0, /* rightshift */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
583 32, /* bitsize */
584 TRUE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_signed, /* complain_on_overflow */
587 0, /* special_function */
588 "SREL32", /* name */
589 FALSE, /* partial_inplace */
590 0xffffffff, /* src_mask */
591 0xffffffff, /* dst_mask */
592 TRUE), /* pcrel_offset */
594 /* A 64 bit PC relative offset. */
595 HOWTO (R_ALPHA_SREL64, /* type */
596 0, /* rightshift */
597 4, /* size (0 = byte, 1 = short, 2 = long) */
598 64, /* bitsize */
599 TRUE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_signed, /* complain_on_overflow */
602 0, /* special_function */
603 "SREL64", /* name */
604 FALSE, /* partial_inplace */
605 MINUS_ONE, /* src_mask */
606 MINUS_ONE, /* dst_mask */
607 TRUE), /* pcrel_offset */
609 /* Skip 12 - 16; deprecated ECOFF relocs. */
610 SKIP_HOWTO (12),
611 SKIP_HOWTO (13),
612 SKIP_HOWTO (14),
613 SKIP_HOWTO (15),
614 SKIP_HOWTO (16),
616 /* The high 16 bits of the displacement from GP to the target. */
617 HOWTO (R_ALPHA_GPRELHIGH,
618 0, /* rightshift */
619 1, /* size (0 = byte, 1 = short, 2 = long) */
620 16, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_signed, /* complain_on_overflow */
624 0, /* special_function */
625 "GPRELHIGH", /* name */
626 FALSE, /* partial_inplace */
627 0xffff, /* src_mask */
628 0xffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
631 /* The low 16 bits of the displacement from GP to the target. */
632 HOWTO (R_ALPHA_GPRELLOW,
633 0, /* rightshift */
634 1, /* size (0 = byte, 1 = short, 2 = long) */
635 16, /* bitsize */
636 FALSE, /* pc_relative */
637 0, /* bitpos */
638 complain_overflow_dont, /* complain_on_overflow */
639 0, /* special_function */
640 "GPRELLOW", /* name */
641 FALSE, /* partial_inplace */
642 0xffff, /* src_mask */
643 0xffff, /* dst_mask */
644 FALSE), /* pcrel_offset */
646 /* A 16-bit displacement from the GP to the target. */
647 HOWTO (R_ALPHA_GPREL16,
648 0, /* rightshift */
649 1, /* size (0 = byte, 1 = short, 2 = long) */
650 16, /* bitsize */
651 FALSE, /* pc_relative */
652 0, /* bitpos */
653 complain_overflow_signed, /* complain_on_overflow */
654 0, /* special_function */
655 "GPREL16", /* name */
656 FALSE, /* partial_inplace */
657 0xffff, /* src_mask */
658 0xffff, /* dst_mask */
659 FALSE), /* pcrel_offset */
661 /* Skip 20 - 23; deprecated ECOFF relocs. */
662 SKIP_HOWTO (20),
663 SKIP_HOWTO (21),
664 SKIP_HOWTO (22),
665 SKIP_HOWTO (23),
667 /* Misc ELF relocations. */
669 /* A dynamic relocation to copy the target into our .dynbss section. */
670 /* Not generated, as all Alpha objects use PIC, so it is not needed. It
671 is present because every other ELF has one, but should not be used
672 because .dynbss is an ugly thing. */
673 HOWTO (R_ALPHA_COPY,
677 FALSE,
679 complain_overflow_dont,
680 bfd_elf_generic_reloc,
681 "COPY",
682 FALSE,
685 TRUE),
687 /* A dynamic relocation for a .got entry. */
688 HOWTO (R_ALPHA_GLOB_DAT,
692 FALSE,
694 complain_overflow_dont,
695 bfd_elf_generic_reloc,
696 "GLOB_DAT",
697 FALSE,
700 TRUE),
702 /* A dynamic relocation for a .plt entry. */
703 HOWTO (R_ALPHA_JMP_SLOT,
707 FALSE,
709 complain_overflow_dont,
710 bfd_elf_generic_reloc,
711 "JMP_SLOT",
712 FALSE,
715 TRUE),
717 /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
718 HOWTO (R_ALPHA_RELATIVE,
722 FALSE,
724 complain_overflow_dont,
725 bfd_elf_generic_reloc,
726 "RELATIVE",
727 FALSE,
730 TRUE),
732 /* A 21 bit branch that adjusts for gp loads. */
733 HOWTO (R_ALPHA_BRSGP, /* type */
734 2, /* rightshift */
735 2, /* size (0 = byte, 1 = short, 2 = long) */
736 21, /* bitsize */
737 TRUE, /* pc_relative */
738 0, /* bitpos */
739 complain_overflow_signed, /* complain_on_overflow */
740 0, /* special_function */
741 "BRSGP", /* name */
742 FALSE, /* partial_inplace */
743 0x1fffff, /* src_mask */
744 0x1fffff, /* dst_mask */
745 TRUE), /* pcrel_offset */
747 /* Creates a tls_index for the symbol in the got. */
748 HOWTO (R_ALPHA_TLSGD, /* type */
749 0, /* rightshift */
750 1, /* size (0 = byte, 1 = short, 2 = long) */
751 16, /* bitsize */
752 FALSE, /* pc_relative */
753 0, /* bitpos */
754 complain_overflow_signed, /* complain_on_overflow */
755 0, /* special_function */
756 "TLSGD", /* name */
757 FALSE, /* partial_inplace */
758 0xffff, /* src_mask */
759 0xffff, /* dst_mask */
760 FALSE), /* pcrel_offset */
762 /* Creates a tls_index for the (current) module in the got. */
763 HOWTO (R_ALPHA_TLSLDM, /* type */
764 0, /* rightshift */
765 1, /* size (0 = byte, 1 = short, 2 = long) */
766 16, /* bitsize */
767 FALSE, /* pc_relative */
768 0, /* bitpos */
769 complain_overflow_signed, /* complain_on_overflow */
770 0, /* special_function */
771 "TLSLDM", /* name */
772 FALSE, /* partial_inplace */
773 0xffff, /* src_mask */
774 0xffff, /* dst_mask */
775 FALSE), /* pcrel_offset */
777 /* A dynamic relocation for a DTP module entry. */
778 HOWTO (R_ALPHA_DTPMOD64, /* type */
779 0, /* rightshift */
780 4, /* size (0 = byte, 1 = short, 2 = long) */
781 64, /* bitsize */
782 FALSE, /* pc_relative */
783 0, /* bitpos */
784 complain_overflow_bitfield, /* complain_on_overflow */
785 0, /* special_function */
786 "DTPMOD64", /* name */
787 FALSE, /* partial_inplace */
788 MINUS_ONE, /* src_mask */
789 MINUS_ONE, /* dst_mask */
790 FALSE), /* pcrel_offset */
792 /* Creates a 64-bit offset in the got for the displacement
793 from DTP to the target. */
794 HOWTO (R_ALPHA_GOTDTPREL, /* type */
795 0, /* rightshift */
796 1, /* size (0 = byte, 1 = short, 2 = long) */
797 16, /* bitsize */
798 FALSE, /* pc_relative */
799 0, /* bitpos */
800 complain_overflow_signed, /* complain_on_overflow */
801 0, /* special_function */
802 "GOTDTPREL", /* name */
803 FALSE, /* partial_inplace */
804 0xffff, /* src_mask */
805 0xffff, /* dst_mask */
806 FALSE), /* pcrel_offset */
808 /* A dynamic relocation for a displacement from DTP to the target. */
809 HOWTO (R_ALPHA_DTPREL64, /* type */
810 0, /* rightshift */
811 4, /* size (0 = byte, 1 = short, 2 = long) */
812 64, /* bitsize */
813 FALSE, /* pc_relative */
814 0, /* bitpos */
815 complain_overflow_bitfield, /* complain_on_overflow */
816 0, /* special_function */
817 "DTPREL64", /* name */
818 FALSE, /* partial_inplace */
819 MINUS_ONE, /* src_mask */
820 MINUS_ONE, /* dst_mask */
821 FALSE), /* pcrel_offset */
823 /* The high 16 bits of the displacement from DTP to the target. */
824 HOWTO (R_ALPHA_DTPRELHI, /* type */
825 0, /* rightshift */
826 1, /* size (0 = byte, 1 = short, 2 = long) */
827 16, /* bitsize */
828 FALSE, /* pc_relative */
829 0, /* bitpos */
830 complain_overflow_signed, /* complain_on_overflow */
831 0, /* special_function */
832 "DTPRELHI", /* name */
833 FALSE, /* partial_inplace */
834 0xffff, /* src_mask */
835 0xffff, /* dst_mask */
836 FALSE), /* pcrel_offset */
838 /* The low 16 bits of the displacement from DTP to the target. */
839 HOWTO (R_ALPHA_DTPRELLO, /* type */
840 0, /* rightshift */
841 1, /* size (0 = byte, 1 = short, 2 = long) */
842 16, /* bitsize */
843 FALSE, /* pc_relative */
844 0, /* bitpos */
845 complain_overflow_dont, /* complain_on_overflow */
846 0, /* special_function */
847 "DTPRELLO", /* name */
848 FALSE, /* partial_inplace */
849 0xffff, /* src_mask */
850 0xffff, /* dst_mask */
851 FALSE), /* pcrel_offset */
853 /* A 16-bit displacement from DTP to the target. */
854 HOWTO (R_ALPHA_DTPREL16, /* type */
855 0, /* rightshift */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
857 16, /* bitsize */
858 FALSE, /* pc_relative */
859 0, /* bitpos */
860 complain_overflow_signed, /* complain_on_overflow */
861 0, /* special_function */
862 "DTPREL16", /* name */
863 FALSE, /* partial_inplace */
864 0xffff, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
868 /* Creates a 64-bit offset in the got for the displacement
869 from TP to the target. */
870 HOWTO (R_ALPHA_GOTTPREL, /* type */
871 0, /* rightshift */
872 1, /* size (0 = byte, 1 = short, 2 = long) */
873 16, /* bitsize */
874 FALSE, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_signed, /* complain_on_overflow */
877 0, /* special_function */
878 "GOTTPREL", /* name */
879 FALSE, /* partial_inplace */
880 0xffff, /* src_mask */
881 0xffff, /* dst_mask */
882 FALSE), /* pcrel_offset */
884 /* A dynamic relocation for a displacement from TP to the target. */
885 HOWTO (R_ALPHA_TPREL64, /* type */
886 0, /* rightshift */
887 4, /* size (0 = byte, 1 = short, 2 = long) */
888 64, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_bitfield, /* complain_on_overflow */
892 0, /* special_function */
893 "TPREL64", /* name */
894 FALSE, /* partial_inplace */
895 MINUS_ONE, /* src_mask */
896 MINUS_ONE, /* dst_mask */
897 FALSE), /* pcrel_offset */
899 /* The high 16 bits of the displacement from TP to the target. */
900 HOWTO (R_ALPHA_TPRELHI, /* type */
901 0, /* rightshift */
902 1, /* size (0 = byte, 1 = short, 2 = long) */
903 16, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_signed, /* complain_on_overflow */
907 0, /* special_function */
908 "TPRELHI", /* name */
909 FALSE, /* partial_inplace */
910 0xffff, /* src_mask */
911 0xffff, /* dst_mask */
912 FALSE), /* pcrel_offset */
914 /* The low 16 bits of the displacement from TP to the target. */
915 HOWTO (R_ALPHA_TPRELLO, /* type */
916 0, /* rightshift */
917 1, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 0, /* special_function */
923 "TPRELLO", /* name */
924 FALSE, /* partial_inplace */
925 0xffff, /* src_mask */
926 0xffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
929 /* A 16-bit displacement from TP to the target. */
930 HOWTO (R_ALPHA_TPREL16, /* type */
931 0, /* rightshift */
932 1, /* size (0 = byte, 1 = short, 2 = long) */
933 16, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_signed, /* complain_on_overflow */
937 0, /* special_function */
938 "TPREL16", /* name */
939 FALSE, /* partial_inplace */
940 0xffff, /* src_mask */
941 0xffff, /* dst_mask */
942 FALSE), /* pcrel_offset */
945 /* A relocation function which doesn't do anything. */
947 static bfd_reloc_status_type
948 elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
949 bfd *abfd ATTRIBUTE_UNUSED;
950 arelent *reloc;
951 asymbol *sym ATTRIBUTE_UNUSED;
952 PTR data ATTRIBUTE_UNUSED;
953 asection *sec;
954 bfd *output_bfd;
955 char **error_message ATTRIBUTE_UNUSED;
957 if (output_bfd)
958 reloc->address += sec->output_offset;
959 return bfd_reloc_ok;
962 /* A relocation function used for an unsupported reloc. */
964 static bfd_reloc_status_type
965 elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message)
966 bfd *abfd ATTRIBUTE_UNUSED;
967 arelent *reloc;
968 asymbol *sym ATTRIBUTE_UNUSED;
969 PTR data ATTRIBUTE_UNUSED;
970 asection *sec;
971 bfd *output_bfd;
972 char **error_message ATTRIBUTE_UNUSED;
974 if (output_bfd)
975 reloc->address += sec->output_offset;
976 return bfd_reloc_notsupported;
979 /* Do the work of the GPDISP relocation. */
981 static bfd_reloc_status_type
982 elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda)
983 bfd *abfd;
984 bfd_vma gpdisp;
985 bfd_byte *p_ldah;
986 bfd_byte *p_lda;
988 bfd_reloc_status_type ret = bfd_reloc_ok;
989 bfd_vma addend;
990 unsigned long i_ldah, i_lda;
992 i_ldah = bfd_get_32 (abfd, p_ldah);
993 i_lda = bfd_get_32 (abfd, p_lda);
995 /* Complain if the instructions are not correct. */
996 if (((i_ldah >> 26) & 0x3f) != 0x09
997 || ((i_lda >> 26) & 0x3f) != 0x08)
998 ret = bfd_reloc_dangerous;
1000 /* Extract the user-supplied offset, mirroring the sign extensions
1001 that the instructions perform. */
1002 addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
1003 addend = (addend ^ 0x80008000) - 0x80008000;
1005 gpdisp += addend;
1007 if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
1008 || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
1009 ret = bfd_reloc_overflow;
1011 /* compensate for the sign extension again. */
1012 i_ldah = ((i_ldah & 0xffff0000)
1013 | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
1014 i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
1016 bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
1017 bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
1019 return ret;
1022 /* The special function for the GPDISP reloc. */
1024 static bfd_reloc_status_type
1025 elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section,
1026 output_bfd, err_msg)
1027 bfd *abfd;
1028 arelent *reloc_entry;
1029 asymbol *sym ATTRIBUTE_UNUSED;
1030 PTR data;
1031 asection *input_section;
1032 bfd *output_bfd;
1033 char **err_msg;
1035 bfd_reloc_status_type ret;
1036 bfd_vma gp, relocation;
1037 bfd_vma high_address;
1038 bfd_byte *p_ldah, *p_lda;
1040 /* Don't do anything if we're not doing a final link. */
1041 if (output_bfd)
1043 reloc_entry->address += input_section->output_offset;
1044 return bfd_reloc_ok;
1047 high_address = bfd_get_section_limit (abfd, input_section);
1048 if (reloc_entry->address > high_address
1049 || reloc_entry->address + reloc_entry->addend > high_address)
1050 return bfd_reloc_outofrange;
1052 /* The gp used in the portion of the output object to which this
1053 input object belongs is cached on the input bfd. */
1054 gp = _bfd_get_gp_value (abfd);
1056 relocation = (input_section->output_section->vma
1057 + input_section->output_offset
1058 + reloc_entry->address);
1060 p_ldah = (bfd_byte *) data + reloc_entry->address;
1061 p_lda = p_ldah + reloc_entry->addend;
1063 ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
1065 /* Complain if the instructions are not correct. */
1066 if (ret == bfd_reloc_dangerous)
1067 *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
1069 return ret;
1072 /* A mapping from BFD reloc types to Alpha ELF reloc types. */
1074 struct elf_reloc_map
1076 bfd_reloc_code_real_type bfd_reloc_val;
1077 int elf_reloc_val;
1080 static const struct elf_reloc_map elf64_alpha_reloc_map[] =
1082 {BFD_RELOC_NONE, R_ALPHA_NONE},
1083 {BFD_RELOC_32, R_ALPHA_REFLONG},
1084 {BFD_RELOC_64, R_ALPHA_REFQUAD},
1085 {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
1086 {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
1087 {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
1088 {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
1089 {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
1090 {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
1091 {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
1092 {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
1093 {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
1094 {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
1095 {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
1096 {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
1097 {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
1098 {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
1099 {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
1100 {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
1101 {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
1102 {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
1103 {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
1104 {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
1105 {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
1106 {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
1107 {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
1108 {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
1109 {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
1110 {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
1111 {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
1114 /* Given a BFD reloc type, return a HOWTO structure. */
1116 static reloc_howto_type *
1117 elf64_alpha_bfd_reloc_type_lookup (abfd, code)
1118 bfd *abfd ATTRIBUTE_UNUSED;
1119 bfd_reloc_code_real_type code;
1121 const struct elf_reloc_map *i, *e;
1122 i = e = elf64_alpha_reloc_map;
1123 e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
1124 for (; i != e; ++i)
1126 if (i->bfd_reloc_val == code)
1127 return &elf64_alpha_howto_table[i->elf_reloc_val];
1129 return 0;
1132 /* Given an Alpha ELF reloc type, fill in an arelent structure. */
1134 static void
1135 elf64_alpha_info_to_howto (abfd, cache_ptr, dst)
1136 bfd *abfd ATTRIBUTE_UNUSED;
1137 arelent *cache_ptr;
1138 Elf_Internal_Rela *dst;
1140 unsigned r_type;
1142 r_type = ELF64_R_TYPE(dst->r_info);
1143 BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
1144 cache_ptr->howto = &elf64_alpha_howto_table[r_type];
1147 /* These two relocations create a two-word entry in the got. */
1148 #define alpha_got_entry_size(r_type) \
1149 (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
1151 /* This is PT_TLS segment p_vaddr. */
1152 #define alpha_get_dtprel_base(info) \
1153 (elf_hash_table (info)->tls_sec->vma)
1155 /* Main program TLS (whose template starts at PT_TLS p_vaddr)
1156 is assigned offset round(16, PT_TLS p_align). */
1157 #define alpha_get_tprel_base(info) \
1158 (elf_hash_table (info)->tls_sec->vma \
1159 - align_power ((bfd_vma) 16, \
1160 elf_hash_table (info)->tls_sec->alignment_power))
1162 /* These functions do relaxation for Alpha ELF.
1164 Currently I'm only handling what I can do with existing compiler
1165 and assembler support, which means no instructions are removed,
1166 though some may be nopped. At this time GCC does not emit enough
1167 information to do all of the relaxing that is possible. It will
1168 take some not small amount of work for that to happen.
1170 There are a couple of interesting papers that I once read on this
1171 subject, that I cannot find references to at the moment, that
1172 related to Alpha in particular. They are by David Wall, then of
1173 DEC WRL. */
1175 #define OP_LDA 0x08
1176 #define OP_LDAH 0x09
1177 #define INSN_JSR 0x68004000
1178 #define INSN_JSR_MASK 0xfc00c000
1179 #define OP_LDQ 0x29
1180 #define OP_BR 0x30
1181 #define OP_BSR 0x34
1182 #define INSN_UNOP 0x2ffe0000
1183 #define INSN_ADDQ 0x40000400
1184 #define INSN_RDUNIQ 0x0000009e
1186 struct alpha_relax_info
1188 bfd *abfd;
1189 asection *sec;
1190 bfd_byte *contents;
1191 Elf_Internal_Shdr *symtab_hdr;
1192 Elf_Internal_Rela *relocs, *relend;
1193 struct bfd_link_info *link_info;
1194 bfd_vma gp;
1195 bfd *gotobj;
1196 asection *tsec;
1197 struct alpha_elf_link_hash_entry *h;
1198 struct alpha_elf_got_entry **first_gotent;
1199 struct alpha_elf_got_entry *gotent;
1200 bfd_boolean changed_contents;
1201 bfd_boolean changed_relocs;
1202 unsigned char other;
1205 static bfd_boolean elf64_alpha_relax_with_lituse
1206 PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1207 Elf_Internal_Rela *irel));
1208 static bfd_vma elf64_alpha_relax_opt_call
1209 PARAMS((struct alpha_relax_info *info, bfd_vma symval));
1210 static bfd_boolean elf64_alpha_relax_got_load
1211 PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1212 Elf_Internal_Rela *irel, unsigned long));
1213 static bfd_boolean elf64_alpha_relax_gprelhilo
1214 PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1215 Elf_Internal_Rela *irel, bfd_boolean));
1216 static bfd_boolean elf64_alpha_relax_tls_get_addr
1217 PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1218 Elf_Internal_Rela *irel, bfd_boolean));
1219 static bfd_boolean elf64_alpha_relax_section
1220 PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
1221 bfd_boolean *again));
1223 static Elf_Internal_Rela *
1224 elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type)
1225 Elf_Internal_Rela *rel, *relend;
1226 bfd_vma offset;
1227 int type;
1229 while (rel < relend)
1231 if (rel->r_offset == offset
1232 && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
1233 return rel;
1234 ++rel;
1236 return NULL;
1239 static bfd_boolean
1240 elf64_alpha_relax_with_lituse (info, symval, irel)
1241 struct alpha_relax_info *info;
1242 bfd_vma symval;
1243 Elf_Internal_Rela *irel;
1245 Elf_Internal_Rela *urel, *irelend = info->relend;
1246 int flags, count, i;
1247 bfd_signed_vma disp;
1248 bfd_boolean fits16;
1249 bfd_boolean fits32;
1250 bfd_boolean lit_reused = FALSE;
1251 bfd_boolean all_optimized = TRUE;
1252 unsigned int lit_insn;
1254 lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
1255 if (lit_insn >> 26 != OP_LDQ)
1257 ((*_bfd_error_handler)
1258 ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn",
1259 info->abfd, info->sec,
1260 (unsigned long) irel->r_offset));
1261 return TRUE;
1264 /* Can't relax dynamic symbols. */
1265 if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
1266 return TRUE;
1268 /* Summarize how this particular LITERAL is used. */
1269 for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
1271 if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
1272 break;
1273 if (urel->r_addend <= 3)
1274 flags |= 1 << urel->r_addend;
1277 /* A little preparation for the loop... */
1278 disp = symval - info->gp;
1280 for (urel = irel+1, i = 0; i < count; ++i, ++urel)
1282 unsigned int insn;
1283 int insn_disp;
1284 bfd_signed_vma xdisp;
1286 insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
1288 switch (urel->r_addend)
1290 case LITUSE_ALPHA_ADDR:
1291 default:
1292 /* This type is really just a placeholder to note that all
1293 uses cannot be optimized, but to still allow some. */
1294 all_optimized = FALSE;
1295 break;
1297 case LITUSE_ALPHA_BASE:
1298 /* We can always optimize 16-bit displacements. */
1300 /* Extract the displacement from the instruction, sign-extending
1301 it if necessary, then test whether it is within 16 or 32 bits
1302 displacement from GP. */
1303 insn_disp = insn & 0x0000ffff;
1304 if (insn_disp & 0x8000)
1305 insn_disp |= ~0xffff; /* Negative: sign-extend. */
1307 xdisp = disp + insn_disp;
1308 fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
1309 fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
1310 && xdisp < 0x7fff8000);
1312 if (fits16)
1314 /* Take the op code and dest from this insn, take the base
1315 register from the literal insn. Leave the offset alone. */
1316 insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
1317 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1318 R_ALPHA_GPREL16);
1319 urel->r_addend = irel->r_addend;
1320 info->changed_relocs = TRUE;
1322 bfd_put_32 (info->abfd, (bfd_vma) insn,
1323 info->contents + urel->r_offset);
1324 info->changed_contents = TRUE;
1327 /* If all mem+byte, we can optimize 32-bit mem displacements. */
1328 else if (fits32 && !(flags & ~6))
1330 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
1332 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1333 R_ALPHA_GPRELHIGH);
1334 lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
1335 bfd_put_32 (info->abfd, (bfd_vma) lit_insn,
1336 info->contents + irel->r_offset);
1337 lit_reused = TRUE;
1338 info->changed_contents = TRUE;
1340 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1341 R_ALPHA_GPRELLOW);
1342 urel->r_addend = irel->r_addend;
1343 info->changed_relocs = TRUE;
1345 else
1346 all_optimized = FALSE;
1347 break;
1349 case LITUSE_ALPHA_BYTOFF:
1350 /* We can always optimize byte instructions. */
1352 /* FIXME: sanity check the insn for byte op. Check that the
1353 literal dest reg is indeed Rb in the byte insn. */
1355 insn &= ~ (unsigned) 0x001ff000;
1356 insn |= ((symval & 7) << 13) | 0x1000;
1358 urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1359 urel->r_addend = 0;
1360 info->changed_relocs = TRUE;
1362 bfd_put_32 (info->abfd, (bfd_vma) insn,
1363 info->contents + urel->r_offset);
1364 info->changed_contents = TRUE;
1365 break;
1367 case LITUSE_ALPHA_JSR:
1368 case LITUSE_ALPHA_TLSGD:
1369 case LITUSE_ALPHA_TLSLDM:
1371 bfd_vma optdest, org;
1372 bfd_signed_vma odisp;
1374 /* If not zero, place to jump without needing pv. */
1375 optdest = elf64_alpha_relax_opt_call (info, symval);
1376 org = (info->sec->output_section->vma
1377 + info->sec->output_offset
1378 + urel->r_offset + 4);
1379 odisp = (optdest ? optdest : symval) - org;
1381 if (odisp >= -0x400000 && odisp < 0x400000)
1383 Elf_Internal_Rela *xrel;
1385 /* Preserve branch prediction call stack when possible. */
1386 if ((insn & INSN_JSR_MASK) == INSN_JSR)
1387 insn = (OP_BSR << 26) | (insn & 0x03e00000);
1388 else
1389 insn = (OP_BR << 26) | (insn & 0x03e00000);
1391 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1392 R_ALPHA_BRADDR);
1393 urel->r_addend = irel->r_addend;
1395 if (optdest)
1396 urel->r_addend += optdest - symval;
1397 else
1398 all_optimized = FALSE;
1400 bfd_put_32 (info->abfd, (bfd_vma) insn,
1401 info->contents + urel->r_offset);
1403 /* Kill any HINT reloc that might exist for this insn. */
1404 xrel = (elf64_alpha_find_reloc_at_ofs
1405 (info->relocs, info->relend, urel->r_offset,
1406 R_ALPHA_HINT));
1407 if (xrel)
1408 xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1410 info->changed_contents = TRUE;
1411 info->changed_relocs = TRUE;
1413 else
1414 all_optimized = FALSE;
1416 /* Even if the target is not in range for a direct branch,
1417 if we share a GP, we can eliminate the gp reload. */
1418 if (optdest)
1420 Elf_Internal_Rela *gpdisp
1421 = (elf64_alpha_find_reloc_at_ofs
1422 (info->relocs, irelend, urel->r_offset + 4,
1423 R_ALPHA_GPDISP));
1424 if (gpdisp)
1426 bfd_byte *p_ldah = info->contents + gpdisp->r_offset;
1427 bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
1428 unsigned int ldah = bfd_get_32 (info->abfd, p_ldah);
1429 unsigned int lda = bfd_get_32 (info->abfd, p_lda);
1431 /* Verify that the instruction is "ldah $29,0($26)".
1432 Consider a function that ends in a noreturn call,
1433 and that the next function begins with an ldgp,
1434 and that by accident there is no padding between.
1435 In that case the insn would use $27 as the base. */
1436 if (ldah == 0x27ba0000 && lda == 0x23bd0000)
1438 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah);
1439 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda);
1441 gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1442 info->changed_contents = TRUE;
1443 info->changed_relocs = TRUE;
1448 break;
1452 /* If all cases were optimized, we can reduce the use count on this
1453 got entry by one, possibly eliminating it. */
1454 if (all_optimized)
1456 if (--info->gotent->use_count == 0)
1458 int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
1459 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
1460 if (!info->h)
1461 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
1464 /* If the literal instruction is no longer needed (it may have been
1465 reused. We can eliminate it. */
1466 /* ??? For now, I don't want to deal with compacting the section,
1467 so just nop it out. */
1468 if (!lit_reused)
1470 irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1471 info->changed_relocs = TRUE;
1473 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP,
1474 info->contents + irel->r_offset);
1475 info->changed_contents = TRUE;
1479 return TRUE;
1482 static bfd_vma
1483 elf64_alpha_relax_opt_call (info, symval)
1484 struct alpha_relax_info *info;
1485 bfd_vma symval;
1487 /* If the function has the same gp, and we can identify that the
1488 function does not use its function pointer, we can eliminate the
1489 address load. */
1491 /* If the symbol is marked NOPV, we are being told the function never
1492 needs its procedure value. */
1493 if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
1494 return symval;
1496 /* If the symbol is marked STD_GP, we are being told the function does
1497 a normal ldgp in the first two words. */
1498 else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
1501 /* Otherwise, we may be able to identify a GP load in the first two
1502 words, which we can then skip. */
1503 else
1505 Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
1506 bfd_vma ofs;
1508 /* Load the relocations from the section that the target symbol is in. */
1509 if (info->sec == info->tsec)
1511 tsec_relocs = info->relocs;
1512 tsec_relend = info->relend;
1513 tsec_free = NULL;
1515 else
1517 tsec_relocs = (_bfd_elf_link_read_relocs
1518 (info->abfd, info->tsec, (PTR) NULL,
1519 (Elf_Internal_Rela *) NULL,
1520 info->link_info->keep_memory));
1521 if (tsec_relocs == NULL)
1522 return 0;
1523 tsec_relend = tsec_relocs + info->tsec->reloc_count;
1524 tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
1527 /* Recover the symbol's offset within the section. */
1528 ofs = (symval - info->tsec->output_section->vma
1529 - info->tsec->output_offset);
1531 /* Look for a GPDISP reloc. */
1532 gpdisp = (elf64_alpha_find_reloc_at_ofs
1533 (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
1535 if (!gpdisp || gpdisp->r_addend != 4)
1537 if (tsec_free)
1538 free (tsec_free);
1539 return 0;
1541 if (tsec_free)
1542 free (tsec_free);
1545 /* We've now determined that we can skip an initial gp load. Verify
1546 that the call and the target use the same gp. */
1547 if (info->link_info->hash->creator != info->tsec->owner->xvec
1548 || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
1549 return 0;
1551 return symval + 8;
1554 static bfd_boolean
1555 elf64_alpha_relax_got_load (info, symval, irel, r_type)
1556 struct alpha_relax_info *info;
1557 bfd_vma symval;
1558 Elf_Internal_Rela *irel;
1559 unsigned long r_type;
1561 unsigned int insn;
1562 bfd_signed_vma disp;
1564 /* Get the instruction. */
1565 insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
1567 if (insn >> 26 != OP_LDQ)
1569 reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
1570 ((*_bfd_error_handler)
1571 ("%B: %A+0x%lx: warning: %s relocation against unexpected insn",
1572 info->abfd, info->sec,
1573 (unsigned long) irel->r_offset, howto->name));
1574 return TRUE;
1577 /* Can't relax dynamic symbols. */
1578 if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
1579 return TRUE;
1581 /* Can't use local-exec relocations in shared libraries. */
1582 if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared)
1583 return TRUE;
1585 if (r_type == R_ALPHA_LITERAL)
1586 disp = symval - info->gp;
1587 else
1589 bfd_vma dtp_base, tp_base;
1591 BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
1592 dtp_base = alpha_get_dtprel_base (info->link_info);
1593 tp_base = alpha_get_tprel_base (info->link_info);
1594 disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
1597 if (disp < -0x8000 || disp >= 0x8000)
1598 return TRUE;
1600 /* Exchange LDQ for LDA. In the case of the TLS relocs, we're loading
1601 a constant, so force the base register to be $31. */
1602 if (r_type == R_ALPHA_LITERAL)
1603 insn = (OP_LDA << 26) | (insn & 0x03ff0000);
1604 else
1605 insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
1606 bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
1607 info->changed_contents = TRUE;
1609 /* Reduce the use count on this got entry by one, possibly
1610 eliminating it. */
1611 if (--info->gotent->use_count == 0)
1613 int sz = alpha_got_entry_size (r_type);
1614 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
1615 if (!info->h)
1616 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
1619 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
1620 switch (r_type)
1622 case R_ALPHA_LITERAL:
1623 r_type = R_ALPHA_GPREL16;
1624 break;
1625 case R_ALPHA_GOTDTPREL:
1626 r_type = R_ALPHA_DTPREL16;
1627 break;
1628 case R_ALPHA_GOTTPREL:
1629 r_type = R_ALPHA_TPREL16;
1630 break;
1631 default:
1632 BFD_ASSERT (0);
1633 return FALSE;
1636 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
1637 info->changed_relocs = TRUE;
1639 /* ??? Search forward through this basic block looking for insns
1640 that use the target register. Stop after an insn modifying the
1641 register is seen, or after a branch or call.
1643 Any such memory load insn may be substituted by a load directly
1644 off the GP. This allows the memory load insn to be issued before
1645 the calculated GP register would otherwise be ready.
1647 Any such jsr insn can be replaced by a bsr if it is in range.
1649 This would mean that we'd have to _add_ relocations, the pain of
1650 which gives one pause. */
1652 return TRUE;
1655 static bfd_boolean
1656 elf64_alpha_relax_gprelhilo (info, symval, irel, hi)
1657 struct alpha_relax_info *info;
1658 bfd_vma symval;
1659 Elf_Internal_Rela *irel;
1660 bfd_boolean hi;
1662 unsigned int insn;
1663 bfd_signed_vma disp;
1664 bfd_byte *pos = info->contents + irel->r_offset;
1666 /* ??? This assumes that the compiler doesn't render
1668 array[i]
1670 ldah t, array(gp) !gprelhigh
1671 s8addl i, t, t
1672 ldq r, array(t) !gprellow
1674 which would indeed be the most efficient way to implement this. */
1676 return TRUE;
1678 disp = symval - info->gp;
1679 if (disp < -0x8000 || disp >= 0x8000)
1680 return TRUE;
1682 if (hi)
1684 /* Nop out the high instruction. */
1686 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos);
1687 info->changed_contents = TRUE;
1689 irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1690 irel->r_addend = 0;
1691 info->changed_relocs = TRUE;
1693 else
1695 /* Adjust the low instruction to reference GP directly. */
1697 insn = bfd_get_32 (info->abfd, pos);
1698 insn = (insn & 0xffe00000) | (29 << 16);
1699 bfd_put_32 (info->abfd, (bfd_vma) insn, pos);
1700 info->changed_contents = TRUE;
1702 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1703 R_ALPHA_GPREL16);
1704 info->changed_relocs = TRUE;
1707 return TRUE;
1710 static bfd_boolean
1711 elf64_alpha_relax_tls_get_addr (info, symval, irel, is_gd)
1712 struct alpha_relax_info *info;
1713 bfd_vma symval;
1714 Elf_Internal_Rela *irel;
1715 bfd_boolean is_gd;
1717 bfd_byte *pos[5];
1718 unsigned int insn;
1719 Elf_Internal_Rela *gpdisp, *hint;
1720 bfd_boolean dynamic, use_gottprel, pos1_unusable;
1721 unsigned long new_symndx;
1723 dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
1725 /* If a TLS symbol is accessed using IE at least once, there is no point
1726 to use dynamic model for it. */
1727 if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
1730 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
1731 then we might as well relax to IE. */
1732 else if (info->link_info->shared && !dynamic
1733 && (info->link_info->flags & DF_STATIC_TLS))
1736 /* Otherwise we must be building an executable to do anything. */
1737 else if (info->link_info->shared)
1738 return TRUE;
1740 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
1741 the matching LITUSE_TLS relocations. */
1742 if (irel + 2 >= info->relend)
1743 return TRUE;
1744 if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
1745 || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
1746 || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
1747 return TRUE;
1749 /* There must be a GPDISP relocation positioned immediately after the
1750 LITUSE relocation. */
1751 gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
1752 irel[2].r_offset + 4, R_ALPHA_GPDISP);
1753 if (!gpdisp)
1754 return TRUE;
1756 pos[0] = info->contents + irel[0].r_offset;
1757 pos[1] = info->contents + irel[1].r_offset;
1758 pos[2] = info->contents + irel[2].r_offset;
1759 pos[3] = info->contents + gpdisp->r_offset;
1760 pos[4] = pos[3] + gpdisp->r_addend;
1761 pos1_unusable = FALSE;
1763 /* Generally, the positions are not allowed to be out of order, lest the
1764 modified insn sequence have different register lifetimes. We can make
1765 an exception when pos 1 is adjacent to pos 0. */
1766 if (pos[1] + 4 == pos[0])
1768 bfd_byte *tmp = pos[0];
1769 pos[0] = pos[1];
1770 pos[1] = tmp;
1772 else if (pos[1] < pos[0])
1773 pos1_unusable = TRUE;
1774 if (pos[1] >= pos[2] || pos[2] >= pos[3])
1775 return TRUE;
1777 /* Reduce the use count on the LITERAL relocation. Do this before we
1778 smash the symndx when we adjust the relocations below. */
1780 struct alpha_elf_got_entry *lit_gotent;
1781 struct alpha_elf_link_hash_entry *lit_h;
1782 unsigned long indx;
1784 BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
1785 indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
1786 lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
1788 while (lit_h->root.root.type == bfd_link_hash_indirect
1789 || lit_h->root.root.type == bfd_link_hash_warning)
1790 lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
1792 for (lit_gotent = lit_h->got_entries; lit_gotent ;
1793 lit_gotent = lit_gotent->next)
1794 if (lit_gotent->gotobj == info->gotobj
1795 && lit_gotent->reloc_type == R_ALPHA_LITERAL
1796 && lit_gotent->addend == irel[1].r_addend)
1797 break;
1798 BFD_ASSERT (lit_gotent);
1800 if (--lit_gotent->use_count == 0)
1802 int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
1803 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
1807 /* Change
1809 lda $16,x($gp) !tlsgd!1
1810 ldq $27,__tls_get_addr($gp) !literal!1
1811 jsr $26,($27)__tls_get_addr !lituse_tlsgd!1
1812 ldah $29,0($26) !gpdisp!2
1813 lda $29,0($29) !gpdisp!2
1815 ldq $16,x($gp) !gottprel
1816 unop
1817 call_pal rduniq
1818 addq $16,$0,$0
1819 unop
1820 or the first pair to
1821 lda $16,x($gp) !tprel
1822 unop
1824 ldah $16,x($gp) !tprelhi
1825 lda $16,x($16) !tprello
1827 as appropriate. */
1829 use_gottprel = FALSE;
1830 new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : 0;
1831 switch (!dynamic && !info->link_info->shared)
1833 case 1:
1835 bfd_vma tp_base;
1836 bfd_signed_vma disp;
1838 BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
1839 tp_base = alpha_get_tprel_base (info->link_info);
1840 disp = symval - tp_base;
1842 if (disp >= -0x8000 && disp < 0x8000)
1844 insn = (OP_LDA << 26) | (16 << 21) | (31 << 16);
1845 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
1846 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
1848 irel[0].r_offset = pos[0] - info->contents;
1849 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16);
1850 irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1851 break;
1853 else if (disp >= -(bfd_signed_vma) 0x80000000
1854 && disp < (bfd_signed_vma) 0x7fff8000
1855 && !pos1_unusable)
1857 insn = (OP_LDAH << 26) | (16 << 21) | (31 << 16);
1858 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
1859 insn = (OP_LDA << 26) | (16 << 21) | (16 << 16);
1860 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
1862 irel[0].r_offset = pos[0] - info->contents;
1863 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI);
1864 irel[1].r_offset = pos[1] - info->contents;
1865 irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO);
1866 break;
1869 /* FALLTHRU */
1871 default:
1872 use_gottprel = TRUE;
1874 insn = (OP_LDQ << 26) | (16 << 21) | (29 << 16);
1875 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
1876 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
1878 irel[0].r_offset = pos[0] - info->contents;
1879 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL);
1880 irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1881 break;
1884 bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
1886 insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
1887 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
1889 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
1891 irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1892 gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1894 hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
1895 irel[2].r_offset, R_ALPHA_HINT);
1896 if (hint)
1897 hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1899 info->changed_contents = TRUE;
1900 info->changed_relocs = TRUE;
1902 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
1903 if (--info->gotent->use_count == 0)
1905 int sz = alpha_got_entry_size (info->gotent->reloc_type);
1906 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
1907 if (!info->h)
1908 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
1911 /* If we've switched to a GOTTPREL relocation, increment the reference
1912 count on that got entry. */
1913 if (use_gottprel)
1915 struct alpha_elf_got_entry *tprel_gotent;
1917 for (tprel_gotent = *info->first_gotent; tprel_gotent ;
1918 tprel_gotent = tprel_gotent->next)
1919 if (tprel_gotent->gotobj == info->gotobj
1920 && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
1921 && tprel_gotent->addend == irel->r_addend)
1922 break;
1923 if (tprel_gotent)
1924 tprel_gotent->use_count++;
1925 else
1927 if (info->gotent->use_count == 0)
1928 tprel_gotent = info->gotent;
1929 else
1931 tprel_gotent = (struct alpha_elf_got_entry *)
1932 bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
1933 if (!tprel_gotent)
1934 return FALSE;
1936 tprel_gotent->next = *info->first_gotent;
1937 *info->first_gotent = tprel_gotent;
1939 tprel_gotent->gotobj = info->gotobj;
1940 tprel_gotent->addend = irel->r_addend;
1941 tprel_gotent->got_offset = -1;
1942 tprel_gotent->reloc_done = 0;
1943 tprel_gotent->reloc_xlated = 0;
1946 tprel_gotent->use_count = 1;
1947 tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
1951 return TRUE;
1954 static bfd_boolean
1955 elf64_alpha_relax_section (abfd, sec, link_info, again)
1956 bfd *abfd;
1957 asection *sec;
1958 struct bfd_link_info *link_info;
1959 bfd_boolean *again;
1961 Elf_Internal_Shdr *symtab_hdr;
1962 Elf_Internal_Rela *internal_relocs;
1963 Elf_Internal_Rela *irel, *irelend;
1964 Elf_Internal_Sym *isymbuf = NULL;
1965 struct alpha_elf_got_entry **local_got_entries;
1966 struct alpha_relax_info info;
1968 /* We are not currently changing any sizes, so only one pass. */
1969 *again = FALSE;
1971 if (link_info->relocatable
1972 || (sec->flags & SEC_RELOC) == 0
1973 || sec->reloc_count == 0)
1974 return TRUE;
1976 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1977 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
1979 /* Load the relocations for this section. */
1980 internal_relocs = (_bfd_elf_link_read_relocs
1981 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
1982 link_info->keep_memory));
1983 if (internal_relocs == NULL)
1984 return FALSE;
1986 memset(&info, 0, sizeof (info));
1987 info.abfd = abfd;
1988 info.sec = sec;
1989 info.link_info = link_info;
1990 info.symtab_hdr = symtab_hdr;
1991 info.relocs = internal_relocs;
1992 info.relend = irelend = internal_relocs + sec->reloc_count;
1994 /* Find the GP for this object. Do not store the result back via
1995 _bfd_set_gp_value, since this could change again before final. */
1996 info.gotobj = alpha_elf_tdata (abfd)->gotobj;
1997 if (info.gotobj)
1999 asection *sgot = alpha_elf_tdata (info.gotobj)->got;
2000 info.gp = (sgot->output_section->vma
2001 + sgot->output_offset
2002 + 0x8000);
2005 /* Get the section contents. */
2006 if (elf_section_data (sec)->this_hdr.contents != NULL)
2007 info.contents = elf_section_data (sec)->this_hdr.contents;
2008 else
2010 if (!bfd_malloc_and_get_section (abfd, sec, &info.contents))
2011 goto error_return;
2014 for (irel = internal_relocs; irel < irelend; irel++)
2016 bfd_vma symval;
2017 struct alpha_elf_got_entry *gotent;
2018 unsigned long r_type = ELF64_R_TYPE (irel->r_info);
2019 unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
2021 /* Early exit for unhandled or unrelaxable relocations. */
2022 switch (r_type)
2024 case R_ALPHA_LITERAL:
2025 case R_ALPHA_GPRELHIGH:
2026 case R_ALPHA_GPRELLOW:
2027 case R_ALPHA_GOTDTPREL:
2028 case R_ALPHA_GOTTPREL:
2029 case R_ALPHA_TLSGD:
2030 break;
2032 case R_ALPHA_TLSLDM:
2033 /* The symbol for a TLSLDM reloc is ignored. Collapse the
2034 reloc to the 0 symbol so that they all match. */
2035 r_symndx = 0;
2036 break;
2038 default:
2039 continue;
2042 /* Get the value of the symbol referred to by the reloc. */
2043 if (r_symndx < symtab_hdr->sh_info)
2045 /* A local symbol. */
2046 Elf_Internal_Sym *isym;
2048 /* Read this BFD's local symbols. */
2049 if (isymbuf == NULL)
2051 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2052 if (isymbuf == NULL)
2053 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2054 symtab_hdr->sh_info, 0,
2055 NULL, NULL, NULL);
2056 if (isymbuf == NULL)
2057 goto error_return;
2060 isym = isymbuf + r_symndx;
2062 /* Given the symbol for a TLSLDM reloc is ignored, this also
2063 means forcing the symbol value to the tp base. */
2064 if (r_type == R_ALPHA_TLSLDM)
2066 info.tsec = bfd_abs_section_ptr;
2067 symval = alpha_get_tprel_base (info.link_info);
2069 else
2071 symval = isym->st_value;
2072 if (isym->st_shndx == SHN_UNDEF)
2073 continue;
2074 else if (isym->st_shndx == SHN_ABS)
2075 info.tsec = bfd_abs_section_ptr;
2076 else if (isym->st_shndx == SHN_COMMON)
2077 info.tsec = bfd_com_section_ptr;
2078 else
2079 info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2082 info.h = NULL;
2083 info.other = isym->st_other;
2084 if (local_got_entries)
2085 info.first_gotent = &local_got_entries[r_symndx];
2086 else
2088 info.first_gotent = &info.gotent;
2089 info.gotent = NULL;
2092 else
2094 unsigned long indx;
2095 struct alpha_elf_link_hash_entry *h;
2097 indx = r_symndx - symtab_hdr->sh_info;
2098 h = alpha_elf_sym_hashes (abfd)[indx];
2099 BFD_ASSERT (h != NULL);
2101 while (h->root.root.type == bfd_link_hash_indirect
2102 || h->root.root.type == bfd_link_hash_warning)
2103 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2105 /* If the symbol is undefined, we can't do anything with it. */
2106 if (h->root.root.type == bfd_link_hash_undefweak
2107 || h->root.root.type == bfd_link_hash_undefined)
2108 continue;
2110 /* If the symbol isn't defined in the current module, again
2111 we can't do anything. */
2112 if (!h->root.def_regular)
2114 /* Except for TLSGD relocs, which can sometimes be
2115 relaxed to GOTTPREL relocs. */
2116 if (r_type != R_ALPHA_TLSGD)
2117 continue;
2118 info.tsec = bfd_abs_section_ptr;
2119 symval = 0;
2121 else
2123 info.tsec = h->root.root.u.def.section;
2124 symval = h->root.root.u.def.value;
2127 info.h = h;
2128 info.other = h->root.other;
2129 info.first_gotent = &h->got_entries;
2132 /* Search for the got entry to be used by this relocation. */
2133 for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
2134 if (gotent->gotobj == info.gotobj
2135 && gotent->reloc_type == r_type
2136 && gotent->addend == irel->r_addend)
2137 break;
2138 info.gotent = gotent;
2140 symval += info.tsec->output_section->vma + info.tsec->output_offset;
2141 symval += irel->r_addend;
2143 switch (r_type)
2145 case R_ALPHA_LITERAL:
2146 BFD_ASSERT(info.gotent != NULL);
2148 /* If there exist LITUSE relocations immediately following, this
2149 opens up all sorts of interesting optimizations, because we
2150 now know every location that this address load is used. */
2151 if (irel+1 < irelend
2152 && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
2154 if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
2155 goto error_return;
2157 else
2159 if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
2160 goto error_return;
2162 break;
2164 case R_ALPHA_GPRELHIGH:
2165 case R_ALPHA_GPRELLOW:
2166 if (!elf64_alpha_relax_gprelhilo (&info, symval, irel,
2167 r_type == R_ALPHA_GPRELHIGH))
2168 goto error_return;
2169 break;
2171 case R_ALPHA_GOTDTPREL:
2172 case R_ALPHA_GOTTPREL:
2173 BFD_ASSERT(info.gotent != NULL);
2174 if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
2175 goto error_return;
2176 break;
2178 case R_ALPHA_TLSGD:
2179 case R_ALPHA_TLSLDM:
2180 BFD_ASSERT(info.gotent != NULL);
2181 if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
2182 r_type == R_ALPHA_TLSGD))
2183 goto error_return;
2184 break;
2188 if (!elf64_alpha_size_plt_section (link_info))
2189 return FALSE;
2190 if (!elf64_alpha_size_got_sections (link_info))
2191 return FALSE;
2192 if (!elf64_alpha_size_rela_got_section (link_info))
2193 return FALSE;
2195 if (isymbuf != NULL
2196 && symtab_hdr->contents != (unsigned char *) isymbuf)
2198 if (!link_info->keep_memory)
2199 free (isymbuf);
2200 else
2202 /* Cache the symbols for elf_link_input_bfd. */
2203 symtab_hdr->contents = (unsigned char *) isymbuf;
2207 if (info.contents != NULL
2208 && elf_section_data (sec)->this_hdr.contents != info.contents)
2210 if (!info.changed_contents && !link_info->keep_memory)
2211 free (info.contents);
2212 else
2214 /* Cache the section contents for elf_link_input_bfd. */
2215 elf_section_data (sec)->this_hdr.contents = info.contents;
2219 if (elf_section_data (sec)->relocs != internal_relocs)
2221 if (!info.changed_relocs)
2222 free (internal_relocs);
2223 else
2224 elf_section_data (sec)->relocs = internal_relocs;
2227 *again = info.changed_contents || info.changed_relocs;
2229 return TRUE;
2231 error_return:
2232 if (isymbuf != NULL
2233 && symtab_hdr->contents != (unsigned char *) isymbuf)
2234 free (isymbuf);
2235 if (info.contents != NULL
2236 && elf_section_data (sec)->this_hdr.contents != info.contents)
2237 free (info.contents);
2238 if (internal_relocs != NULL
2239 && elf_section_data (sec)->relocs != internal_relocs)
2240 free (internal_relocs);
2241 return FALSE;
2244 /* PLT/GOT Stuff */
2245 #define PLT_HEADER_SIZE 32
2246 #define PLT_HEADER_WORD1 (bfd_vma) 0xc3600000 /* br $27,.+4 */
2247 #define PLT_HEADER_WORD2 (bfd_vma) 0xa77b000c /* ldq $27,12($27) */
2248 #define PLT_HEADER_WORD3 (bfd_vma) 0x47ff041f /* nop */
2249 #define PLT_HEADER_WORD4 (bfd_vma) 0x6b7b0000 /* jmp $27,($27) */
2251 #define PLT_ENTRY_SIZE 12
2252 #define PLT_ENTRY_WORD1 0xc3800000 /* br $28, plt0 */
2253 #define PLT_ENTRY_WORD2 0
2254 #define PLT_ENTRY_WORD3 0
2256 #define MAX_GOT_SIZE (64*1024)
2258 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
2260 /* Handle an Alpha specific section when reading an object file. This
2261 is called when bfd_section_from_shdr finds a section with an unknown
2262 type.
2263 FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
2264 how to. */
2266 static bfd_boolean
2267 elf64_alpha_section_from_shdr (bfd *abfd,
2268 Elf_Internal_Shdr *hdr,
2269 const char *name,
2270 int shindex)
2272 asection *newsect;
2274 /* There ought to be a place to keep ELF backend specific flags, but
2275 at the moment there isn't one. We just keep track of the
2276 sections by their name, instead. Fortunately, the ABI gives
2277 suggested names for all the MIPS specific sections, so we will
2278 probably get away with this. */
2279 switch (hdr->sh_type)
2281 case SHT_ALPHA_DEBUG:
2282 if (strcmp (name, ".mdebug") != 0)
2283 return FALSE;
2284 break;
2285 default:
2286 return FALSE;
2289 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2290 return FALSE;
2291 newsect = hdr->bfd_section;
2293 if (hdr->sh_type == SHT_ALPHA_DEBUG)
2295 if (! bfd_set_section_flags (abfd, newsect,
2296 (bfd_get_section_flags (abfd, newsect)
2297 | SEC_DEBUGGING)))
2298 return FALSE;
2301 return TRUE;
2304 /* Convert Alpha specific section flags to bfd internal section flags. */
2306 static bfd_boolean
2307 elf64_alpha_section_flags (flags, hdr)
2308 flagword *flags;
2309 const Elf_Internal_Shdr *hdr;
2311 if (hdr->sh_flags & SHF_ALPHA_GPREL)
2312 *flags |= SEC_SMALL_DATA;
2314 return TRUE;
2317 /* Set the correct type for an Alpha ELF section. We do this by the
2318 section name, which is a hack, but ought to work. */
2320 static bfd_boolean
2321 elf64_alpha_fake_sections (abfd, hdr, sec)
2322 bfd *abfd;
2323 Elf_Internal_Shdr *hdr;
2324 asection *sec;
2326 register const char *name;
2328 name = bfd_get_section_name (abfd, sec);
2330 if (strcmp (name, ".mdebug") == 0)
2332 hdr->sh_type = SHT_ALPHA_DEBUG;
2333 /* In a shared object on Irix 5.3, the .mdebug section has an
2334 entsize of 0. FIXME: Does this matter? */
2335 if ((abfd->flags & DYNAMIC) != 0 )
2336 hdr->sh_entsize = 0;
2337 else
2338 hdr->sh_entsize = 1;
2340 else if ((sec->flags & SEC_SMALL_DATA)
2341 || strcmp (name, ".sdata") == 0
2342 || strcmp (name, ".sbss") == 0
2343 || strcmp (name, ".lit4") == 0
2344 || strcmp (name, ".lit8") == 0)
2345 hdr->sh_flags |= SHF_ALPHA_GPREL;
2347 return TRUE;
2350 /* Hook called by the linker routine which adds symbols from an object
2351 file. We use it to put .comm items in .sbss, and not .bss. */
2353 static bfd_boolean
2354 elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2355 bfd *abfd;
2356 struct bfd_link_info *info;
2357 Elf_Internal_Sym *sym;
2358 const char **namep ATTRIBUTE_UNUSED;
2359 flagword *flagsp ATTRIBUTE_UNUSED;
2360 asection **secp;
2361 bfd_vma *valp;
2363 if (sym->st_shndx == SHN_COMMON
2364 && !info->relocatable
2365 && sym->st_size <= elf_gp_size (abfd))
2367 /* Common symbols less than or equal to -G nn bytes are
2368 automatically put into .sbss. */
2370 asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
2372 if (scomm == NULL)
2374 scomm = bfd_make_section (abfd, ".scommon");
2375 if (scomm == NULL
2376 || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC
2377 | SEC_IS_COMMON
2378 | SEC_LINKER_CREATED)))
2379 return FALSE;
2382 *secp = scomm;
2383 *valp = sym->st_size;
2386 return TRUE;
2389 /* Create the .got section. */
2391 static bfd_boolean
2392 elf64_alpha_create_got_section(abfd, info)
2393 bfd *abfd;
2394 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2396 asection *s;
2398 if ((s = bfd_get_section_by_name (abfd, ".got")))
2400 /* Check for a non-linker created .got? */
2401 if (alpha_elf_tdata (abfd)->got == NULL)
2402 alpha_elf_tdata (abfd)->got = s;
2403 return TRUE;
2406 s = bfd_make_section (abfd, ".got");
2407 if (s == NULL
2408 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
2409 | SEC_HAS_CONTENTS
2410 | SEC_IN_MEMORY
2411 | SEC_LINKER_CREATED))
2412 || !bfd_set_section_alignment (abfd, s, 3))
2413 return FALSE;
2415 alpha_elf_tdata (abfd)->got = s;
2417 return TRUE;
2420 /* Create all the dynamic sections. */
2422 static bfd_boolean
2423 elf64_alpha_create_dynamic_sections (abfd, info)
2424 bfd *abfd;
2425 struct bfd_link_info *info;
2427 asection *s;
2428 struct elf_link_hash_entry *h;
2429 struct bfd_link_hash_entry *bh;
2431 /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
2433 s = bfd_make_section (abfd, ".plt");
2434 if (s == NULL
2435 || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
2436 | SEC_HAS_CONTENTS
2437 | SEC_IN_MEMORY
2438 | SEC_LINKER_CREATED
2439 | SEC_CODE))
2440 || ! bfd_set_section_alignment (abfd, s, 3))
2441 return FALSE;
2443 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
2444 .plt section. */
2445 bh = NULL;
2446 if (! (_bfd_generic_link_add_one_symbol
2447 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
2448 (bfd_vma) 0, (const char *) NULL, FALSE,
2449 get_elf_backend_data (abfd)->collect, &bh)))
2450 return FALSE;
2451 h = (struct elf_link_hash_entry *) bh;
2452 h->def_regular = 1;
2453 h->type = STT_OBJECT;
2455 if (info->shared
2456 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2457 return FALSE;
2459 s = bfd_make_section (abfd, ".rela.plt");
2460 if (s == NULL
2461 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
2462 | SEC_HAS_CONTENTS
2463 | SEC_IN_MEMORY
2464 | SEC_LINKER_CREATED
2465 | SEC_READONLY))
2466 || ! bfd_set_section_alignment (abfd, s, 3))
2467 return FALSE;
2469 /* We may or may not have created a .got section for this object, but
2470 we definitely havn't done the rest of the work. */
2472 if (!elf64_alpha_create_got_section (abfd, info))
2473 return FALSE;
2475 s = bfd_make_section(abfd, ".rela.got");
2476 if (s == NULL
2477 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
2478 | SEC_HAS_CONTENTS
2479 | SEC_IN_MEMORY
2480 | SEC_LINKER_CREATED
2481 | SEC_READONLY))
2482 || !bfd_set_section_alignment (abfd, s, 3))
2483 return FALSE;
2485 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
2486 dynobj's .got section. We don't do this in the linker script
2487 because we don't want to define the symbol if we are not creating
2488 a global offset table. */
2489 bh = NULL;
2490 if (!(_bfd_generic_link_add_one_symbol
2491 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL,
2492 alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL,
2493 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2494 return FALSE;
2495 h = (struct elf_link_hash_entry *) bh;
2496 h->def_regular = 1;
2497 h->type = STT_OBJECT;
2499 if (info->shared
2500 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2501 return FALSE;
2503 elf_hash_table (info)->hgot = h;
2505 return TRUE;
2508 /* Read ECOFF debugging information from a .mdebug section into a
2509 ecoff_debug_info structure. */
2511 static bfd_boolean
2512 elf64_alpha_read_ecoff_info (abfd, section, debug)
2513 bfd *abfd;
2514 asection *section;
2515 struct ecoff_debug_info *debug;
2517 HDRR *symhdr;
2518 const struct ecoff_debug_swap *swap;
2519 char *ext_hdr = NULL;
2521 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
2522 memset (debug, 0, sizeof (*debug));
2524 ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
2525 if (ext_hdr == NULL && swap->external_hdr_size != 0)
2526 goto error_return;
2528 if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
2529 swap->external_hdr_size))
2530 goto error_return;
2532 symhdr = &debug->symbolic_header;
2533 (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
2535 /* The symbolic header contains absolute file offsets and sizes to
2536 read. */
2537 #define READ(ptr, offset, count, size, type) \
2538 if (symhdr->count == 0) \
2539 debug->ptr = NULL; \
2540 else \
2542 bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
2543 debug->ptr = (type) bfd_malloc (amt); \
2544 if (debug->ptr == NULL) \
2545 goto error_return; \
2546 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
2547 || bfd_bread (debug->ptr, amt, abfd) != amt) \
2548 goto error_return; \
2551 READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
2552 READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
2553 READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
2554 READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
2555 READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
2556 READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
2557 union aux_ext *);
2558 READ (ss, cbSsOffset, issMax, sizeof (char), char *);
2559 READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
2560 READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
2561 READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
2562 READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
2563 #undef READ
2565 debug->fdr = NULL;
2567 return TRUE;
2569 error_return:
2570 if (ext_hdr != NULL)
2571 free (ext_hdr);
2572 if (debug->line != NULL)
2573 free (debug->line);
2574 if (debug->external_dnr != NULL)
2575 free (debug->external_dnr);
2576 if (debug->external_pdr != NULL)
2577 free (debug->external_pdr);
2578 if (debug->external_sym != NULL)
2579 free (debug->external_sym);
2580 if (debug->external_opt != NULL)
2581 free (debug->external_opt);
2582 if (debug->external_aux != NULL)
2583 free (debug->external_aux);
2584 if (debug->ss != NULL)
2585 free (debug->ss);
2586 if (debug->ssext != NULL)
2587 free (debug->ssext);
2588 if (debug->external_fdr != NULL)
2589 free (debug->external_fdr);
2590 if (debug->external_rfd != NULL)
2591 free (debug->external_rfd);
2592 if (debug->external_ext != NULL)
2593 free (debug->external_ext);
2594 return FALSE;
2597 /* Alpha ELF local labels start with '$'. */
2599 static bfd_boolean
2600 elf64_alpha_is_local_label_name (abfd, name)
2601 bfd *abfd ATTRIBUTE_UNUSED;
2602 const char *name;
2604 return name[0] == '$';
2607 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
2608 routine in order to handle the ECOFF debugging information. We
2609 still call this mips_elf_find_line because of the slot
2610 find_line_info in elf_obj_tdata is declared that way. */
2612 struct mips_elf_find_line
2614 struct ecoff_debug_info d;
2615 struct ecoff_find_line i;
2618 static bfd_boolean
2619 elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
2620 functionname_ptr, line_ptr)
2621 bfd *abfd;
2622 asection *section;
2623 asymbol **symbols;
2624 bfd_vma offset;
2625 const char **filename_ptr;
2626 const char **functionname_ptr;
2627 unsigned int *line_ptr;
2629 asection *msec;
2631 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
2632 filename_ptr, functionname_ptr,
2633 line_ptr, 0,
2634 &elf_tdata (abfd)->dwarf2_find_line_info))
2635 return TRUE;
2637 msec = bfd_get_section_by_name (abfd, ".mdebug");
2638 if (msec != NULL)
2640 flagword origflags;
2641 struct mips_elf_find_line *fi;
2642 const struct ecoff_debug_swap * const swap =
2643 get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
2645 /* If we are called during a link, alpha_elf_final_link may have
2646 cleared the SEC_HAS_CONTENTS field. We force it back on here
2647 if appropriate (which it normally will be). */
2648 origflags = msec->flags;
2649 if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
2650 msec->flags |= SEC_HAS_CONTENTS;
2652 fi = elf_tdata (abfd)->find_line_info;
2653 if (fi == NULL)
2655 bfd_size_type external_fdr_size;
2656 char *fraw_src;
2657 char *fraw_end;
2658 struct fdr *fdr_ptr;
2659 bfd_size_type amt = sizeof (struct mips_elf_find_line);
2661 fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
2662 if (fi == NULL)
2664 msec->flags = origflags;
2665 return FALSE;
2668 if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
2670 msec->flags = origflags;
2671 return FALSE;
2674 /* Swap in the FDR information. */
2675 amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
2676 fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
2677 if (fi->d.fdr == NULL)
2679 msec->flags = origflags;
2680 return FALSE;
2682 external_fdr_size = swap->external_fdr_size;
2683 fdr_ptr = fi->d.fdr;
2684 fraw_src = (char *) fi->d.external_fdr;
2685 fraw_end = (fraw_src
2686 + fi->d.symbolic_header.ifdMax * external_fdr_size);
2687 for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
2688 (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
2690 elf_tdata (abfd)->find_line_info = fi;
2692 /* Note that we don't bother to ever free this information.
2693 find_nearest_line is either called all the time, as in
2694 objdump -l, so the information should be saved, or it is
2695 rarely called, as in ld error messages, so the memory
2696 wasted is unimportant. Still, it would probably be a
2697 good idea for free_cached_info to throw it away. */
2700 if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
2701 &fi->i, filename_ptr, functionname_ptr,
2702 line_ptr))
2704 msec->flags = origflags;
2705 return TRUE;
2708 msec->flags = origflags;
2711 /* Fall back on the generic ELF find_nearest_line routine. */
2713 return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
2714 filename_ptr, functionname_ptr,
2715 line_ptr);
2718 /* Structure used to pass information to alpha_elf_output_extsym. */
2720 struct extsym_info
2722 bfd *abfd;
2723 struct bfd_link_info *info;
2724 struct ecoff_debug_info *debug;
2725 const struct ecoff_debug_swap *swap;
2726 bfd_boolean failed;
2729 static bfd_boolean
2730 elf64_alpha_output_extsym (h, data)
2731 struct alpha_elf_link_hash_entry *h;
2732 PTR data;
2734 struct extsym_info *einfo = (struct extsym_info *) data;
2735 bfd_boolean strip;
2736 asection *sec, *output_section;
2738 if (h->root.root.type == bfd_link_hash_warning)
2739 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
2741 if (h->root.indx == -2)
2742 strip = FALSE;
2743 else if ((h->root.def_dynamic
2744 || h->root.ref_dynamic
2745 || h->root.root.type == bfd_link_hash_new)
2746 && !h->root.def_regular
2747 && !h->root.ref_regular)
2748 strip = TRUE;
2749 else if (einfo->info->strip == strip_all
2750 || (einfo->info->strip == strip_some
2751 && bfd_hash_lookup (einfo->info->keep_hash,
2752 h->root.root.root.string,
2753 FALSE, FALSE) == NULL))
2754 strip = TRUE;
2755 else
2756 strip = FALSE;
2758 if (strip)
2759 return TRUE;
2761 if (h->esym.ifd == -2)
2763 h->esym.jmptbl = 0;
2764 h->esym.cobol_main = 0;
2765 h->esym.weakext = 0;
2766 h->esym.reserved = 0;
2767 h->esym.ifd = ifdNil;
2768 h->esym.asym.value = 0;
2769 h->esym.asym.st = stGlobal;
2771 if (h->root.root.type != bfd_link_hash_defined
2772 && h->root.root.type != bfd_link_hash_defweak)
2773 h->esym.asym.sc = scAbs;
2774 else
2776 const char *name;
2778 sec = h->root.root.u.def.section;
2779 output_section = sec->output_section;
2781 /* When making a shared library and symbol h is the one from
2782 the another shared library, OUTPUT_SECTION may be null. */
2783 if (output_section == NULL)
2784 h->esym.asym.sc = scUndefined;
2785 else
2787 name = bfd_section_name (output_section->owner, output_section);
2789 if (strcmp (name, ".text") == 0)
2790 h->esym.asym.sc = scText;
2791 else if (strcmp (name, ".data") == 0)
2792 h->esym.asym.sc = scData;
2793 else if (strcmp (name, ".sdata") == 0)
2794 h->esym.asym.sc = scSData;
2795 else if (strcmp (name, ".rodata") == 0
2796 || strcmp (name, ".rdata") == 0)
2797 h->esym.asym.sc = scRData;
2798 else if (strcmp (name, ".bss") == 0)
2799 h->esym.asym.sc = scBss;
2800 else if (strcmp (name, ".sbss") == 0)
2801 h->esym.asym.sc = scSBss;
2802 else if (strcmp (name, ".init") == 0)
2803 h->esym.asym.sc = scInit;
2804 else if (strcmp (name, ".fini") == 0)
2805 h->esym.asym.sc = scFini;
2806 else
2807 h->esym.asym.sc = scAbs;
2811 h->esym.asym.reserved = 0;
2812 h->esym.asym.index = indexNil;
2815 if (h->root.root.type == bfd_link_hash_common)
2816 h->esym.asym.value = h->root.root.u.c.size;
2817 else if (h->root.root.type == bfd_link_hash_defined
2818 || h->root.root.type == bfd_link_hash_defweak)
2820 if (h->esym.asym.sc == scCommon)
2821 h->esym.asym.sc = scBss;
2822 else if (h->esym.asym.sc == scSCommon)
2823 h->esym.asym.sc = scSBss;
2825 sec = h->root.root.u.def.section;
2826 output_section = sec->output_section;
2827 if (output_section != NULL)
2828 h->esym.asym.value = (h->root.root.u.def.value
2829 + sec->output_offset
2830 + output_section->vma);
2831 else
2832 h->esym.asym.value = 0;
2834 else if (h->root.needs_plt)
2836 /* Set type and value for a symbol with a function stub. */
2837 h->esym.asym.st = stProc;
2838 sec = bfd_get_section_by_name (einfo->abfd, ".plt");
2839 if (sec == NULL)
2840 h->esym.asym.value = 0;
2841 else
2843 output_section = sec->output_section;
2844 if (output_section != NULL)
2845 h->esym.asym.value = (h->root.plt.offset
2846 + sec->output_offset
2847 + output_section->vma);
2848 else
2849 h->esym.asym.value = 0;
2853 if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
2854 h->root.root.root.string,
2855 &h->esym))
2857 einfo->failed = TRUE;
2858 return FALSE;
2861 return TRUE;
2864 /* Search for and possibly create a got entry. */
2866 static struct alpha_elf_got_entry *
2867 get_got_entry (abfd, h, r_type, r_symndx, r_addend)
2868 bfd *abfd;
2869 struct alpha_elf_link_hash_entry *h;
2870 unsigned long r_type, r_symndx;
2871 bfd_vma r_addend;
2873 struct alpha_elf_got_entry *gotent;
2874 struct alpha_elf_got_entry **slot;
2876 if (h)
2877 slot = &h->got_entries;
2878 else
2880 /* This is a local .got entry -- record for merge. */
2882 struct alpha_elf_got_entry **local_got_entries;
2884 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
2885 if (!local_got_entries)
2887 bfd_size_type size;
2888 Elf_Internal_Shdr *symtab_hdr;
2890 symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
2891 size = symtab_hdr->sh_info;
2892 size *= sizeof (struct alpha_elf_got_entry *);
2894 local_got_entries
2895 = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
2896 if (!local_got_entries)
2897 return NULL;
2899 alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
2902 slot = &local_got_entries[r_symndx];
2905 for (gotent = *slot; gotent ; gotent = gotent->next)
2906 if (gotent->gotobj == abfd
2907 && gotent->reloc_type == r_type
2908 && gotent->addend == r_addend)
2909 break;
2911 if (!gotent)
2913 int entry_size;
2914 bfd_size_type amt;
2916 amt = sizeof (struct alpha_elf_got_entry);
2917 gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
2918 if (!gotent)
2919 return NULL;
2921 gotent->gotobj = abfd;
2922 gotent->addend = r_addend;
2923 gotent->got_offset = -1;
2924 gotent->use_count = 1;
2925 gotent->reloc_type = r_type;
2926 gotent->reloc_done = 0;
2927 gotent->reloc_xlated = 0;
2929 gotent->next = *slot;
2930 *slot = gotent;
2932 entry_size = alpha_got_entry_size (r_type);
2933 alpha_elf_tdata (abfd)->total_got_size += entry_size;
2934 if (!h)
2935 alpha_elf_tdata(abfd)->local_got_size += entry_size;
2937 else
2938 gotent->use_count += 1;
2940 return gotent;
2943 /* Handle dynamic relocations when doing an Alpha ELF link. */
2945 static bfd_boolean
2946 elf64_alpha_check_relocs (abfd, info, sec, relocs)
2947 bfd *abfd;
2948 struct bfd_link_info *info;
2949 asection *sec;
2950 const Elf_Internal_Rela *relocs;
2952 bfd *dynobj;
2953 asection *sreloc;
2954 const char *rel_sec_name;
2955 Elf_Internal_Shdr *symtab_hdr;
2956 struct alpha_elf_link_hash_entry **sym_hashes;
2957 const Elf_Internal_Rela *rel, *relend;
2958 bfd_boolean got_created;
2959 bfd_size_type amt;
2961 if (info->relocatable)
2962 return TRUE;
2964 dynobj = elf_hash_table(info)->dynobj;
2965 if (dynobj == NULL)
2966 elf_hash_table(info)->dynobj = dynobj = abfd;
2968 sreloc = NULL;
2969 rel_sec_name = NULL;
2970 symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
2971 sym_hashes = alpha_elf_sym_hashes(abfd);
2972 got_created = FALSE;
2974 relend = relocs + sec->reloc_count;
2975 for (rel = relocs; rel < relend; ++rel)
2977 enum {
2978 NEED_GOT = 1,
2979 NEED_GOT_ENTRY = 2,
2980 NEED_DYNREL = 4
2983 unsigned long r_symndx, r_type;
2984 struct alpha_elf_link_hash_entry *h;
2985 unsigned int gotent_flags;
2986 bfd_boolean maybe_dynamic;
2987 unsigned int need;
2988 bfd_vma addend;
2990 r_symndx = ELF64_R_SYM (rel->r_info);
2991 if (r_symndx < symtab_hdr->sh_info)
2992 h = NULL;
2993 else
2995 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2997 while (h->root.root.type == bfd_link_hash_indirect
2998 || h->root.root.type == bfd_link_hash_warning)
2999 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3001 h->root.ref_regular = 1;
3004 /* We can only get preliminary data on whether a symbol is
3005 locally or externally defined, as not all of the input files
3006 have yet been processed. Do something with what we know, as
3007 this may help reduce memory usage and processing time later. */
3008 maybe_dynamic = FALSE;
3009 if (h && ((info->shared
3010 && (!info->symbolic || info->unresolved_syms_in_shared_libs == RM_IGNORE))
3011 || !h->root.def_regular
3012 || h->root.root.type == bfd_link_hash_defweak))
3013 maybe_dynamic = TRUE;
3015 need = 0;
3016 gotent_flags = 0;
3017 r_type = ELF64_R_TYPE (rel->r_info);
3018 addend = rel->r_addend;
3020 switch (r_type)
3022 case R_ALPHA_LITERAL:
3023 need = NEED_GOT | NEED_GOT_ENTRY;
3025 /* Remember how this literal is used from its LITUSEs.
3026 This will be important when it comes to decide if we can
3027 create a .plt entry for a function symbol. */
3028 while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
3029 if (rel->r_addend >= 1 && rel->r_addend <= 5)
3030 gotent_flags |= 1 << rel->r_addend;
3031 --rel;
3033 /* No LITUSEs -- presumably the address is used somehow. */
3034 if (gotent_flags == 0)
3035 gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
3036 break;
3038 case R_ALPHA_GPDISP:
3039 case R_ALPHA_GPREL16:
3040 case R_ALPHA_GPREL32:
3041 case R_ALPHA_GPRELHIGH:
3042 case R_ALPHA_GPRELLOW:
3043 case R_ALPHA_BRSGP:
3044 need = NEED_GOT;
3045 break;
3047 case R_ALPHA_REFLONG:
3048 case R_ALPHA_REFQUAD:
3049 if ((info->shared && (sec->flags & SEC_ALLOC)) || maybe_dynamic)
3050 need = NEED_DYNREL;
3051 break;
3053 case R_ALPHA_TLSLDM:
3054 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3055 reloc to the 0 symbol so that they all match. */
3056 r_symndx = 0;
3057 h = 0;
3058 maybe_dynamic = FALSE;
3059 /* FALLTHRU */
3061 case R_ALPHA_TLSGD:
3062 case R_ALPHA_GOTDTPREL:
3063 need = NEED_GOT | NEED_GOT_ENTRY;
3064 break;
3066 case R_ALPHA_GOTTPREL:
3067 need = NEED_GOT | NEED_GOT_ENTRY;
3068 gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
3069 if (info->shared)
3070 info->flags |= DF_STATIC_TLS;
3071 break;
3073 case R_ALPHA_TPREL64:
3074 if (info->shared || maybe_dynamic)
3075 need = NEED_DYNREL;
3076 if (info->shared)
3077 info->flags |= DF_STATIC_TLS;
3078 break;
3081 if (need & NEED_GOT)
3083 if (!got_created)
3085 if (!elf64_alpha_create_got_section (abfd, info))
3086 return FALSE;
3088 /* Make sure the object's gotobj is set to itself so
3089 that we default to every object with its own .got.
3090 We'll merge .gots later once we've collected each
3091 object's info. */
3092 alpha_elf_tdata(abfd)->gotobj = abfd;
3094 got_created = 1;
3098 if (need & NEED_GOT_ENTRY)
3100 struct alpha_elf_got_entry *gotent;
3102 gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
3103 if (!gotent)
3104 return FALSE;
3106 if (gotent_flags)
3108 gotent->flags |= gotent_flags;
3109 if (h)
3111 gotent_flags |= h->flags;
3112 h->flags = gotent_flags;
3114 /* Make a guess as to whether a .plt entry is needed. */
3115 if ((gotent_flags & ALPHA_ELF_LINK_HASH_LU_FUNC)
3116 && !(gotent_flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC))
3117 h->root.needs_plt = 1;
3118 else
3119 h->root.needs_plt = 0;
3124 if (need & NEED_DYNREL)
3126 if (rel_sec_name == NULL)
3128 rel_sec_name = (bfd_elf_string_from_elf_section
3129 (abfd, elf_elfheader(abfd)->e_shstrndx,
3130 elf_section_data(sec)->rel_hdr.sh_name));
3131 if (rel_sec_name == NULL)
3132 return FALSE;
3134 BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0
3135 && strcmp (bfd_get_section_name (abfd, sec),
3136 rel_sec_name+5) == 0);
3139 /* We need to create the section here now whether we eventually
3140 use it or not so that it gets mapped to an output section by
3141 the linker. If not used, we'll kill it in
3142 size_dynamic_sections. */
3143 if (sreloc == NULL)
3145 sreloc = bfd_get_section_by_name (dynobj, rel_sec_name);
3146 if (sreloc == NULL)
3148 flagword flags;
3150 sreloc = bfd_make_section (dynobj, rel_sec_name);
3151 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
3152 | SEC_LINKER_CREATED | SEC_READONLY);
3153 if (sec->flags & SEC_ALLOC)
3154 flags |= SEC_ALLOC | SEC_LOAD;
3155 if (sreloc == NULL
3156 || !bfd_set_section_flags (dynobj, sreloc, flags)
3157 || !bfd_set_section_alignment (dynobj, sreloc, 3))
3158 return FALSE;
3162 if (h)
3164 /* Since we havn't seen all of the input symbols yet, we
3165 don't know whether we'll actually need a dynamic relocation
3166 entry for this reloc. So make a record of it. Once we
3167 find out if this thing needs dynamic relocation we'll
3168 expand the relocation sections by the appropriate amount. */
3170 struct alpha_elf_reloc_entry *rent;
3172 for (rent = h->reloc_entries; rent; rent = rent->next)
3173 if (rent->rtype == r_type && rent->srel == sreloc)
3174 break;
3176 if (!rent)
3178 amt = sizeof (struct alpha_elf_reloc_entry);
3179 rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
3180 if (!rent)
3181 return FALSE;
3183 rent->srel = sreloc;
3184 rent->rtype = r_type;
3185 rent->count = 1;
3186 rent->reltext = ((sec->flags & (SEC_READONLY | SEC_ALLOC))
3187 == (SEC_READONLY | SEC_ALLOC));
3189 rent->next = h->reloc_entries;
3190 h->reloc_entries = rent;
3192 else
3193 rent->count++;
3195 else if (info->shared)
3197 /* If this is a shared library, and the section is to be
3198 loaded into memory, we need a RELATIVE reloc. */
3199 sreloc->size += sizeof (Elf64_External_Rela);
3200 if ((sec->flags & (SEC_READONLY | SEC_ALLOC))
3201 == (SEC_READONLY | SEC_ALLOC))
3202 info->flags |= DF_TEXTREL;
3207 return TRUE;
3210 /* Adjust a symbol defined by a dynamic object and referenced by a
3211 regular object. The current definition is in some section of the
3212 dynamic object, but we're not including those sections. We have to
3213 change the definition to something the rest of the link can
3214 understand. */
3216 static bfd_boolean
3217 elf64_alpha_adjust_dynamic_symbol (info, h)
3218 struct bfd_link_info *info;
3219 struct elf_link_hash_entry *h;
3221 bfd *dynobj;
3222 asection *s;
3223 struct alpha_elf_link_hash_entry *ah;
3225 dynobj = elf_hash_table(info)->dynobj;
3226 ah = (struct alpha_elf_link_hash_entry *)h;
3228 /* Now that we've seen all of the input symbols, finalize our decision
3229 about whether this symbol should get a .plt entry. */
3231 if (alpha_elf_dynamic_symbol_p (h, info)
3232 && ((h->type == STT_FUNC
3233 && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR))
3234 || (h->type == STT_NOTYPE
3235 && (ah->flags & ALPHA_ELF_LINK_HASH_LU_FUNC)
3236 && !(ah->flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC)))
3237 /* Don't prevent otherwise valid programs from linking by attempting
3238 to create a new .got entry somewhere. A Correct Solution would be
3239 to add a new .got section to a new object file and let it be merged
3240 somewhere later. But for now don't bother. */
3241 && ah->got_entries)
3243 h->needs_plt = 1;
3245 s = bfd_get_section_by_name(dynobj, ".plt");
3246 if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
3247 return FALSE;
3249 /* The first bit of the .plt is reserved. */
3250 if (s->size == 0)
3251 s->size = PLT_HEADER_SIZE;
3253 h->plt.offset = s->size;
3254 s->size += PLT_ENTRY_SIZE;
3256 /* If this symbol is not defined in a regular file, and we are not
3257 generating a shared library, then set the symbol to the location
3258 in the .plt. This is required to make function pointers compare
3259 equal between the normal executable and the shared library. */
3260 if (! info->shared
3261 && h->root.type != bfd_link_hash_defweak)
3263 ah->plt_old_section = h->root.u.def.section;
3264 ah->plt_old_value = h->root.u.def.value;
3265 ah->flags |= ALPHA_ELF_LINK_HASH_PLT_LOC;
3266 h->root.u.def.section = s;
3267 h->root.u.def.value = h->plt.offset;
3270 /* We also need a JMP_SLOT entry in the .rela.plt section. */
3271 s = bfd_get_section_by_name (dynobj, ".rela.plt");
3272 BFD_ASSERT (s != NULL);
3273 s->size += sizeof (Elf64_External_Rela);
3275 return TRUE;
3277 else
3278 h->needs_plt = 0;
3280 /* If this is a weak symbol, and there is a real definition, the
3281 processor independent code will have arranged for us to see the
3282 real definition first, and we can just use the same value. */
3283 if (h->u.weakdef != NULL)
3285 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3286 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3287 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3288 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3289 return TRUE;
3292 /* This is a reference to a symbol defined by a dynamic object which
3293 is not a function. The Alpha, since it uses .got entries for all
3294 symbols even in regular objects, does not need the hackery of a
3295 .dynbss section and COPY dynamic relocations. */
3297 return TRUE;
3300 /* Symbol versioning can create new symbols, and make our old symbols
3301 indirect to the new ones. Consolidate the got and reloc information
3302 in these situations. */
3304 static bfd_boolean
3305 elf64_alpha_merge_ind_symbols (hi, dummy)
3306 struct alpha_elf_link_hash_entry *hi;
3307 PTR dummy ATTRIBUTE_UNUSED;
3309 struct alpha_elf_link_hash_entry *hs;
3311 if (hi->root.root.type != bfd_link_hash_indirect)
3312 return TRUE;
3313 hs = hi;
3314 do {
3315 hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link;
3316 } while (hs->root.root.type == bfd_link_hash_indirect);
3318 /* Merge the flags. Whee. */
3320 hs->flags |= hi->flags;
3322 /* Merge the .got entries. Cannibalize the old symbol's list in
3323 doing so, since we don't need it anymore. */
3325 if (hs->got_entries == NULL)
3326 hs->got_entries = hi->got_entries;
3327 else
3329 struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
3331 gsh = hs->got_entries;
3332 for (gi = hi->got_entries; gi ; gi = gin)
3334 gin = gi->next;
3335 for (gs = gsh; gs ; gs = gs->next)
3336 if (gi->gotobj == gs->gotobj
3337 && gi->reloc_type == gs->reloc_type
3338 && gi->addend == gs->addend)
3340 gi->use_count += gs->use_count;
3341 goto got_found;
3343 gi->next = hs->got_entries;
3344 hs->got_entries = gi;
3345 got_found:;
3348 hi->got_entries = NULL;
3350 /* And similar for the reloc entries. */
3352 if (hs->reloc_entries == NULL)
3353 hs->reloc_entries = hi->reloc_entries;
3354 else
3356 struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
3358 rsh = hs->reloc_entries;
3359 for (ri = hi->reloc_entries; ri ; ri = rin)
3361 rin = ri->next;
3362 for (rs = rsh; rs ; rs = rs->next)
3363 if (ri->rtype == rs->rtype && ri->srel == rs->srel)
3365 rs->count += ri->count;
3366 goto found_reloc;
3368 ri->next = hs->reloc_entries;
3369 hs->reloc_entries = ri;
3370 found_reloc:;
3373 hi->reloc_entries = NULL;
3375 return TRUE;
3378 /* Is it possible to merge two object file's .got tables? */
3380 static bfd_boolean
3381 elf64_alpha_can_merge_gots (a, b)
3382 bfd *a, *b;
3384 int total = alpha_elf_tdata (a)->total_got_size;
3385 bfd *bsub;
3387 /* Trivial quick fallout test. */
3388 if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
3389 return TRUE;
3391 /* By their nature, local .got entries cannot be merged. */
3392 if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
3393 return FALSE;
3395 /* Failing the common trivial comparison, we must effectively
3396 perform the merge. Not actually performing the merge means that
3397 we don't have to store undo information in case we fail. */
3398 for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
3400 struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
3401 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
3402 int i, n;
3404 n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
3405 for (i = 0; i < n; ++i)
3407 struct alpha_elf_got_entry *ae, *be;
3408 struct alpha_elf_link_hash_entry *h;
3410 h = hashes[i];
3411 while (h->root.root.type == bfd_link_hash_indirect
3412 || h->root.root.type == bfd_link_hash_warning)
3413 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3415 for (be = h->got_entries; be ; be = be->next)
3417 if (be->use_count == 0)
3418 continue;
3419 if (be->gotobj != b)
3420 continue;
3422 for (ae = h->got_entries; ae ; ae = ae->next)
3423 if (ae->gotobj == a
3424 && ae->reloc_type == be->reloc_type
3425 && ae->addend == be->addend)
3426 goto global_found;
3428 total += alpha_got_entry_size (be->reloc_type);
3429 if (total > MAX_GOT_SIZE)
3430 return FALSE;
3431 global_found:;
3436 return TRUE;
3439 /* Actually merge two .got tables. */
3441 static void
3442 elf64_alpha_merge_gots (a, b)
3443 bfd *a, *b;
3445 int total = alpha_elf_tdata (a)->total_got_size;
3446 bfd *bsub;
3448 /* Remember local expansion. */
3450 int e = alpha_elf_tdata (b)->local_got_size;
3451 total += e;
3452 alpha_elf_tdata (a)->local_got_size += e;
3455 for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
3457 struct alpha_elf_got_entry **local_got_entries;
3458 struct alpha_elf_link_hash_entry **hashes;
3459 Elf_Internal_Shdr *symtab_hdr;
3460 int i, n;
3462 /* Let the local .got entries know they are part of a new subsegment. */
3463 local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
3464 if (local_got_entries)
3466 n = elf_tdata (bsub)->symtab_hdr.sh_info;
3467 for (i = 0; i < n; ++i)
3469 struct alpha_elf_got_entry *ent;
3470 for (ent = local_got_entries[i]; ent; ent = ent->next)
3471 ent->gotobj = a;
3475 /* Merge the global .got entries. */
3476 hashes = alpha_elf_sym_hashes (bsub);
3477 symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
3479 n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
3480 for (i = 0; i < n; ++i)
3482 struct alpha_elf_got_entry *ae, *be, **pbe, **start;
3483 struct alpha_elf_link_hash_entry *h;
3485 h = hashes[i];
3486 while (h->root.root.type == bfd_link_hash_indirect
3487 || h->root.root.type == bfd_link_hash_warning)
3488 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3490 start = &h->got_entries;
3491 for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
3493 if (be->use_count == 0)
3495 *pbe = be->next;
3496 continue;
3498 if (be->gotobj != b)
3499 continue;
3501 for (ae = *start; ae ; ae = ae->next)
3502 if (ae->gotobj == a
3503 && ae->reloc_type == be->reloc_type
3504 && ae->addend == be->addend)
3506 ae->flags |= be->flags;
3507 ae->use_count += be->use_count;
3508 *pbe = be->next;
3509 goto global_found;
3511 be->gotobj = a;
3512 total += alpha_got_entry_size (be->reloc_type);
3514 global_found:;
3518 alpha_elf_tdata (bsub)->gotobj = a;
3520 alpha_elf_tdata (a)->total_got_size = total;
3522 /* Merge the two in_got chains. */
3524 bfd *next;
3526 bsub = a;
3527 while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
3528 bsub = next;
3530 alpha_elf_tdata (bsub)->in_got_link_next = b;
3534 /* Calculate the offsets for the got entries. */
3536 static bfd_boolean
3537 elf64_alpha_calc_got_offsets_for_symbol (h, arg)
3538 struct alpha_elf_link_hash_entry *h;
3539 PTR arg ATTRIBUTE_UNUSED;
3541 bfd_boolean result = TRUE;
3542 struct alpha_elf_got_entry *gotent;
3544 if (h->root.root.type == bfd_link_hash_warning)
3545 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
3547 for (gotent = h->got_entries; gotent; gotent = gotent->next)
3548 if (gotent->use_count > 0)
3550 struct alpha_elf_obj_tdata *td;
3551 bfd_size_type *plge;
3553 td = alpha_elf_tdata (gotent->gotobj);
3554 if (td == NULL)
3556 _bfd_error_handler (_("Symbol %s has no GOT subsection for offset 0x%x"),
3557 h->root.root.root.string, gotent->got_offset);
3558 result = FALSE;
3559 continue;
3561 plge = &td->got->size;
3562 gotent->got_offset = *plge;
3563 *plge += alpha_got_entry_size (gotent->reloc_type);
3566 return result;
3569 static void
3570 elf64_alpha_calc_got_offsets (info)
3571 struct bfd_link_info *info;
3573 bfd *i, *got_list = alpha_elf_hash_table(info)->got_list;
3575 /* First, zero out the .got sizes, as we may be recalculating the
3576 .got after optimizing it. */
3577 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
3578 alpha_elf_tdata(i)->got->size = 0;
3580 /* Next, fill in the offsets for all the global entries. */
3581 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3582 elf64_alpha_calc_got_offsets_for_symbol,
3583 NULL);
3585 /* Finally, fill in the offsets for the local entries. */
3586 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
3588 bfd_size_type got_offset = alpha_elf_tdata(i)->got->size;
3589 bfd *j;
3591 for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
3593 struct alpha_elf_got_entry **local_got_entries, *gotent;
3594 int k, n;
3596 local_got_entries = alpha_elf_tdata(j)->local_got_entries;
3597 if (!local_got_entries)
3598 continue;
3600 for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
3601 for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
3602 if (gotent->use_count > 0)
3604 gotent->got_offset = got_offset;
3605 got_offset += alpha_got_entry_size (gotent->reloc_type);
3609 alpha_elf_tdata(i)->got->size = got_offset;
3613 /* Constructs the gots. */
3615 static bfd_boolean
3616 elf64_alpha_size_got_sections (info)
3617 struct bfd_link_info *info;
3619 bfd *i, *got_list, *cur_got_obj = NULL;
3620 int something_changed = 0;
3622 got_list = alpha_elf_hash_table (info)->got_list;
3624 /* On the first time through, pretend we have an existing got list
3625 consisting of all of the input files. */
3626 if (got_list == NULL)
3628 for (i = info->input_bfds; i ; i = i->link_next)
3630 bfd *this_got = alpha_elf_tdata (i)->gotobj;
3631 if (this_got == NULL)
3632 continue;
3634 /* We are assuming no merging has yet occurred. */
3635 BFD_ASSERT (this_got == i);
3637 if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
3639 /* Yikes! A single object file has too many entries. */
3640 (*_bfd_error_handler)
3641 (_("%B: .got subsegment exceeds 64K (size %d)"),
3642 i, alpha_elf_tdata (this_got)->total_got_size);
3643 return FALSE;
3646 if (got_list == NULL)
3647 got_list = this_got;
3648 else
3649 alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
3650 cur_got_obj = this_got;
3653 /* Strange degenerate case of no got references. */
3654 if (got_list == NULL)
3655 return TRUE;
3657 alpha_elf_hash_table (info)->got_list = got_list;
3659 /* Force got offsets to be recalculated. */
3660 something_changed = 1;
3663 cur_got_obj = got_list;
3664 i = alpha_elf_tdata(cur_got_obj)->got_link_next;
3665 while (i != NULL)
3667 if (elf64_alpha_can_merge_gots (cur_got_obj, i))
3669 elf64_alpha_merge_gots (cur_got_obj, i);
3670 i = alpha_elf_tdata(i)->got_link_next;
3671 alpha_elf_tdata(cur_got_obj)->got_link_next = i;
3672 something_changed = 1;
3674 else
3676 cur_got_obj = i;
3677 i = alpha_elf_tdata(i)->got_link_next;
3681 /* Once the gots have been merged, fill in the got offsets for
3682 everything therein. */
3683 if (1 || something_changed)
3684 elf64_alpha_calc_got_offsets (info);
3686 return TRUE;
3689 /* Called from relax_section to rebuild the PLT in light of
3690 potential changes in the function's status. */
3692 static bfd_boolean
3693 elf64_alpha_size_plt_section (info)
3694 struct bfd_link_info *info;
3696 asection *splt, *spltrel;
3697 unsigned long entries;
3698 bfd *dynobj;
3700 dynobj = elf_hash_table(info)->dynobj;
3701 splt = bfd_get_section_by_name(dynobj, ".plt");
3702 if (splt == NULL)
3703 return TRUE;
3705 splt->size = 0;
3707 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3708 elf64_alpha_size_plt_section_1, splt);
3710 /* Every plt entry requires a JMP_SLOT relocation. */
3711 spltrel = bfd_get_section_by_name (dynobj, ".rela.plt");
3712 if (splt->size)
3713 entries = (splt->size - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
3714 else
3715 entries = 0;
3716 spltrel->size = entries * sizeof (Elf64_External_Rela);
3718 return TRUE;
3721 static bfd_boolean
3722 elf64_alpha_size_plt_section_1 (h, data)
3723 struct alpha_elf_link_hash_entry *h;
3724 PTR data;
3726 asection *splt = (asection *) data;
3727 struct alpha_elf_got_entry *gotent;
3729 /* If we didn't need an entry before, we still don't. */
3730 if (!h->root.needs_plt)
3731 return TRUE;
3733 /* There must still be a LITERAL got entry for the function. */
3734 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
3735 if (gotent->reloc_type == R_ALPHA_LITERAL
3736 && gotent->use_count > 0)
3737 break;
3739 /* If there is, reset the PLT offset. If not, there's no longer
3740 a need for the PLT entry. */
3741 if (gotent)
3743 if (splt->size == 0)
3744 splt->size = PLT_HEADER_SIZE;
3745 h->root.plt.offset = splt->size;
3746 splt->size += PLT_ENTRY_SIZE;
3748 else
3750 h->root.needs_plt = 0;
3751 h->root.plt.offset = -1;
3753 /* Undo the definition frobbing begun in adjust_dynamic_symbol. */
3754 if (h->flags & ALPHA_ELF_LINK_HASH_PLT_LOC)
3756 h->root.root.u.def.section = h->plt_old_section;
3757 h->root.root.u.def.value = h->plt_old_value;
3758 h->flags &= ~ALPHA_ELF_LINK_HASH_PLT_LOC;
3762 return TRUE;
3765 static bfd_boolean
3766 elf64_alpha_always_size_sections (output_bfd, info)
3767 bfd *output_bfd ATTRIBUTE_UNUSED;
3768 struct bfd_link_info *info;
3770 bfd *i;
3772 if (info->relocatable)
3773 return TRUE;
3775 /* First, take care of the indirect symbols created by versioning. */
3776 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3777 elf64_alpha_merge_ind_symbols,
3778 NULL);
3780 if (!elf64_alpha_size_got_sections (info))
3781 return FALSE;
3783 /* Allocate space for all of the .got subsections. */
3784 i = alpha_elf_hash_table (info)->got_list;
3785 for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
3787 asection *s = alpha_elf_tdata(i)->got;
3788 if (s->size > 0)
3790 s->contents = (bfd_byte *) bfd_zalloc (i, s->size);
3791 if (s->contents == NULL)
3792 return FALSE;
3796 return TRUE;
3799 /* The number of dynamic relocations required by a static relocation. */
3801 static int
3802 alpha_dynamic_entries_for_reloc (r_type, dynamic, shared)
3803 int r_type, dynamic, shared;
3805 switch (r_type)
3807 /* May appear in GOT entries. */
3808 case R_ALPHA_TLSGD:
3809 return (dynamic ? 2 : shared ? 1 : 0);
3810 case R_ALPHA_TLSLDM:
3811 return shared;
3812 case R_ALPHA_LITERAL:
3813 case R_ALPHA_GOTTPREL:
3814 return dynamic || shared;
3815 case R_ALPHA_GOTDTPREL:
3816 return dynamic;
3818 /* May appear in data sections. */
3819 case R_ALPHA_REFLONG:
3820 case R_ALPHA_REFQUAD:
3821 case R_ALPHA_TPREL64:
3822 return dynamic || shared;
3824 /* Everything else is illegal. We'll issue an error during
3825 relocate_section. */
3826 default:
3827 return 0;
3831 /* Work out the sizes of the dynamic relocation entries. */
3833 static bfd_boolean
3834 elf64_alpha_calc_dynrel_sizes (h, info)
3835 struct alpha_elf_link_hash_entry *h;
3836 struct bfd_link_info *info;
3838 bfd_boolean dynamic;
3839 struct alpha_elf_reloc_entry *relent;
3840 unsigned long entries;
3842 if (h->root.root.type == bfd_link_hash_warning)
3843 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
3845 /* If the symbol was defined as a common symbol in a regular object
3846 file, and there was no definition in any dynamic object, then the
3847 linker will have allocated space for the symbol in a common
3848 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
3849 set. This is done for dynamic symbols in
3850 elf_adjust_dynamic_symbol but this is not done for non-dynamic
3851 symbols, somehow. */
3852 if (!h->root.def_regular
3853 && h->root.ref_regular
3854 && !h->root.def_dynamic
3855 && (h->root.root.type == bfd_link_hash_defined
3856 || h->root.root.type == bfd_link_hash_defweak)
3857 && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
3858 h->root.def_regular = 1;
3860 /* If the symbol is dynamic, we'll need all the relocations in their
3861 natural form. If this is a shared object, and it has been forced
3862 local, we'll need the same number of RELATIVE relocations. */
3864 dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
3866 for (relent = h->reloc_entries; relent; relent = relent->next)
3868 entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
3869 info->shared);
3870 if (entries)
3872 relent->srel->size +=
3873 entries * sizeof (Elf64_External_Rela) * relent->count;
3874 if (relent->reltext)
3875 info->flags |= DT_TEXTREL;
3879 return TRUE;
3882 /* Set the sizes of the dynamic relocation sections. */
3884 static bfd_boolean
3885 elf64_alpha_size_rela_got_section (info)
3886 struct bfd_link_info *info;
3888 unsigned long entries;
3889 bfd *i, *dynobj;
3890 asection *srel;
3892 /* Shared libraries often require RELATIVE relocs, and some relocs
3893 require attention for the main application as well. */
3895 entries = 0;
3896 for (i = alpha_elf_hash_table(info)->got_list;
3897 i ; i = alpha_elf_tdata(i)->got_link_next)
3899 bfd *j;
3901 for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
3903 struct alpha_elf_got_entry **local_got_entries, *gotent;
3904 int k, n;
3906 local_got_entries = alpha_elf_tdata(j)->local_got_entries;
3907 if (!local_got_entries)
3908 continue;
3910 for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
3911 for (gotent = local_got_entries[k];
3912 gotent ; gotent = gotent->next)
3913 if (gotent->use_count > 0)
3914 entries += (alpha_dynamic_entries_for_reloc
3915 (gotent->reloc_type, 0, info->shared));
3919 dynobj = elf_hash_table(info)->dynobj;
3920 srel = bfd_get_section_by_name (dynobj, ".rela.got");
3921 if (!srel)
3923 BFD_ASSERT (entries == 0);
3924 return TRUE;
3926 srel->size = sizeof (Elf64_External_Rela) * entries;
3928 /* Now do the non-local symbols. */
3929 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3930 elf64_alpha_size_rela_got_1, info);
3932 return TRUE;
3935 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
3936 global symbols. */
3938 static bfd_boolean
3939 elf64_alpha_size_rela_got_1 (h, info)
3940 struct alpha_elf_link_hash_entry *h;
3941 struct bfd_link_info *info;
3943 bfd_boolean dynamic;
3944 struct alpha_elf_got_entry *gotent;
3945 unsigned long entries;
3947 if (h->root.root.type == bfd_link_hash_warning)
3948 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
3950 /* If the symbol is dynamic, we'll need all the relocations in their
3951 natural form. If this is a shared object, and it has been forced
3952 local, we'll need the same number of RELATIVE relocations. */
3954 dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
3956 entries = 0;
3957 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
3958 if (gotent->use_count > 0)
3959 entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type,
3960 dynamic, info->shared);
3962 /* If we are using a .plt entry, subtract one, as the first
3963 reference uses a .rela.plt entry instead. */
3964 if (h->root.plt.offset != MINUS_ONE)
3965 entries--;
3967 if (entries > 0)
3969 bfd *dynobj = elf_hash_table(info)->dynobj;
3970 asection *srel = bfd_get_section_by_name (dynobj, ".rela.got");
3971 BFD_ASSERT (srel != NULL);
3972 srel->size += sizeof (Elf64_External_Rela) * entries;
3975 return TRUE;
3978 /* Set the sizes of the dynamic sections. */
3980 static bfd_boolean
3981 elf64_alpha_size_dynamic_sections (output_bfd, info)
3982 bfd *output_bfd ATTRIBUTE_UNUSED;
3983 struct bfd_link_info *info;
3985 bfd *dynobj;
3986 asection *s;
3987 bfd_boolean relplt;
3989 dynobj = elf_hash_table(info)->dynobj;
3990 BFD_ASSERT(dynobj != NULL);
3992 if (elf_hash_table (info)->dynamic_sections_created)
3994 /* Set the contents of the .interp section to the interpreter. */
3995 if (info->executable)
3997 s = bfd_get_section_by_name (dynobj, ".interp");
3998 BFD_ASSERT (s != NULL);
3999 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4000 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4003 /* Now that we've seen all of the input files, we can decide which
4004 symbols need dynamic relocation entries and which don't. We've
4005 collected information in check_relocs that we can now apply to
4006 size the dynamic relocation sections. */
4007 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
4008 elf64_alpha_calc_dynrel_sizes, info);
4010 elf64_alpha_size_rela_got_section (info);
4012 /* else we're not dynamic and by definition we don't need such things. */
4014 /* The check_relocs and adjust_dynamic_symbol entry points have
4015 determined the sizes of the various dynamic sections. Allocate
4016 memory for them. */
4017 relplt = FALSE;
4018 for (s = dynobj->sections; s != NULL; s = s->next)
4020 const char *name;
4021 bfd_boolean strip;
4023 if (!(s->flags & SEC_LINKER_CREATED))
4024 continue;
4026 /* It's OK to base decisions on the section name, because none
4027 of the dynobj section names depend upon the input files. */
4028 name = bfd_get_section_name (dynobj, s);
4030 /* If we don't need this section, strip it from the output file.
4031 This is to handle .rela.bss and .rela.plt. We must create it
4032 in create_dynamic_sections, because it must be created before
4033 the linker maps input sections to output sections. The
4034 linker does that before adjust_dynamic_symbol is called, and
4035 it is that function which decides whether anything needs to
4036 go into these sections. */
4038 strip = FALSE;
4040 if (strncmp (name, ".rela", 5) == 0)
4042 strip = (s->size == 0);
4044 if (!strip)
4046 if (strcmp(name, ".rela.plt") == 0)
4047 relplt = TRUE;
4049 /* We use the reloc_count field as a counter if we need
4050 to copy relocs into the output file. */
4051 s->reloc_count = 0;
4054 else if (strcmp (name, ".plt") != 0)
4056 /* It's not one of our dynamic sections, so don't allocate space. */
4057 continue;
4060 if (strip)
4061 _bfd_strip_section_from_output (info, s);
4062 else
4064 /* Allocate memory for the section contents. */
4065 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4066 if (s->contents == NULL && s->size != 0)
4067 return FALSE;
4071 if (elf_hash_table (info)->dynamic_sections_created)
4073 /* Add some entries to the .dynamic section. We fill in the
4074 values later, in elf64_alpha_finish_dynamic_sections, but we
4075 must add the entries now so that we get the correct size for
4076 the .dynamic section. The DT_DEBUG entry is filled in by the
4077 dynamic linker and used by the debugger. */
4078 #define add_dynamic_entry(TAG, VAL) \
4079 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4081 if (info->executable)
4083 if (!add_dynamic_entry (DT_DEBUG, 0))
4084 return FALSE;
4087 if (relplt)
4089 if (!add_dynamic_entry (DT_PLTGOT, 0)
4090 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4091 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4092 || !add_dynamic_entry (DT_JMPREL, 0))
4093 return FALSE;
4096 if (!add_dynamic_entry (DT_RELA, 0)
4097 || !add_dynamic_entry (DT_RELASZ, 0)
4098 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
4099 return FALSE;
4101 if (info->flags & DF_TEXTREL)
4103 if (!add_dynamic_entry (DT_TEXTREL, 0))
4104 return FALSE;
4107 #undef add_dynamic_entry
4109 return TRUE;
4112 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4113 into the next available slot in SREL. */
4115 static void
4116 elf64_alpha_emit_dynrel (abfd, info, sec, srel, offset, dynindx, rtype, addend)
4117 bfd *abfd;
4118 struct bfd_link_info *info;
4119 asection *sec, *srel;
4120 bfd_vma offset, addend;
4121 long dynindx, rtype;
4123 Elf_Internal_Rela outrel;
4124 bfd_byte *loc;
4126 BFD_ASSERT (srel != NULL);
4128 outrel.r_info = ELF64_R_INFO (dynindx, rtype);
4129 outrel.r_addend = addend;
4131 offset = _bfd_elf_section_offset (abfd, info, sec, offset);
4132 if ((offset | 1) != (bfd_vma) -1)
4133 outrel.r_offset = sec->output_section->vma + sec->output_offset + offset;
4134 else
4135 memset (&outrel, 0, sizeof (outrel));
4137 loc = srel->contents;
4138 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
4139 bfd_elf64_swap_reloca_out (abfd, &outrel, loc);
4140 BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size);
4143 /* Relocate an Alpha ELF section for a relocatable link.
4145 We don't have to change anything unless the reloc is against a section
4146 symbol, in which case we have to adjust according to where the section
4147 symbol winds up in the output section. */
4149 static bfd_boolean
4150 elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, input_section,
4151 contents, relocs, local_syms, local_sections)
4152 bfd *output_bfd ATTRIBUTE_UNUSED;
4153 struct bfd_link_info *info ATTRIBUTE_UNUSED;
4154 bfd *input_bfd;
4155 asection *input_section;
4156 bfd_byte *contents ATTRIBUTE_UNUSED;
4157 Elf_Internal_Rela *relocs;
4158 Elf_Internal_Sym *local_syms;
4159 asection **local_sections;
4161 unsigned long symtab_hdr_sh_info;
4162 Elf_Internal_Rela *rel;
4163 Elf_Internal_Rela *relend;
4164 bfd_boolean ret_val = TRUE;
4166 symtab_hdr_sh_info = elf_tdata (input_bfd)->symtab_hdr.sh_info;
4168 relend = relocs + input_section->reloc_count;
4169 for (rel = relocs; rel < relend; rel++)
4171 unsigned long r_symndx;
4172 Elf_Internal_Sym *sym;
4173 asection *sec;
4174 unsigned long r_type;
4176 r_type = ELF64_R_TYPE(rel->r_info);
4177 if (r_type >= R_ALPHA_max)
4179 (*_bfd_error_handler)
4180 (_("%B: unknown relocation type %d"),
4181 input_bfd, (int) r_type);
4182 bfd_set_error (bfd_error_bad_value);
4183 ret_val = FALSE;
4184 continue;
4187 r_symndx = ELF64_R_SYM(rel->r_info);
4189 /* The symbol associated with GPDISP and LITUSE is
4190 immaterial. Only the addend is significant. */
4191 if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
4192 continue;
4194 if (r_symndx < symtab_hdr_sh_info)
4196 sym = local_syms + r_symndx;
4197 if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
4199 sec = local_sections[r_symndx];
4200 rel->r_addend += sec->output_offset + sym->st_value;
4205 return ret_val;
4208 /* Relocate an Alpha ELF section. */
4210 static bfd_boolean
4211 elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
4212 contents, relocs, local_syms, local_sections)
4213 bfd *output_bfd;
4214 struct bfd_link_info *info;
4215 bfd *input_bfd;
4216 asection *input_section;
4217 bfd_byte *contents;
4218 Elf_Internal_Rela *relocs;
4219 Elf_Internal_Sym *local_syms;
4220 asection **local_sections;
4222 Elf_Internal_Shdr *symtab_hdr;
4223 Elf_Internal_Rela *rel;
4224 Elf_Internal_Rela *relend;
4225 asection *sgot, *srel, *srelgot;
4226 bfd *dynobj, *gotobj;
4227 bfd_vma gp, tp_base, dtp_base;
4228 struct alpha_elf_got_entry **local_got_entries;
4229 bfd_boolean ret_val;
4230 const char *section_name;
4232 /* Handle relocatable links with a smaller loop. */
4233 if (info->relocatable)
4234 return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd,
4235 input_section, contents, relocs,
4236 local_syms, local_sections);
4238 /* This is a final link. */
4240 ret_val = TRUE;
4242 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4244 dynobj = elf_hash_table (info)->dynobj;
4245 if (dynobj)
4246 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
4247 else
4248 srelgot = NULL;
4250 section_name = (bfd_elf_string_from_elf_section
4251 (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
4252 elf_section_data(input_section)->rel_hdr.sh_name));
4253 BFD_ASSERT(section_name != NULL);
4254 srel = bfd_get_section_by_name (dynobj, section_name);
4256 /* Find the gp value for this input bfd. */
4257 gotobj = alpha_elf_tdata (input_bfd)->gotobj;
4258 if (gotobj)
4260 sgot = alpha_elf_tdata (gotobj)->got;
4261 gp = _bfd_get_gp_value (gotobj);
4262 if (gp == 0)
4264 gp = (sgot->output_section->vma
4265 + sgot->output_offset
4266 + 0x8000);
4267 _bfd_set_gp_value (gotobj, gp);
4270 else
4272 sgot = NULL;
4273 gp = 0;
4276 local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries;
4278 if (elf_hash_table (info)->tls_sec != NULL)
4280 dtp_base = alpha_get_dtprel_base (info);
4281 tp_base = alpha_get_tprel_base (info);
4283 else
4284 dtp_base = tp_base = 0;
4286 relend = relocs + input_section->reloc_count;
4287 for (rel = relocs; rel < relend; rel++)
4289 struct alpha_elf_link_hash_entry *h = NULL;
4290 struct alpha_elf_got_entry *gotent;
4291 bfd_reloc_status_type r;
4292 reloc_howto_type *howto;
4293 unsigned long r_symndx;
4294 Elf_Internal_Sym *sym = NULL;
4295 asection *sec = NULL;
4296 bfd_vma value;
4297 bfd_vma addend;
4298 bfd_boolean dynamic_symbol_p;
4299 bfd_boolean undef_weak_ref = FALSE;
4300 unsigned long r_type;
4302 r_type = ELF64_R_TYPE(rel->r_info);
4303 if (r_type >= R_ALPHA_max)
4305 (*_bfd_error_handler)
4306 (_("%B: unknown relocation type %d"),
4307 input_bfd, (int) r_type);
4308 bfd_set_error (bfd_error_bad_value);
4309 ret_val = FALSE;
4310 continue;
4313 howto = elf64_alpha_howto_table + r_type;
4314 r_symndx = ELF64_R_SYM(rel->r_info);
4316 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4317 reloc to the 0 symbol so that they all match. */
4318 if (r_type == R_ALPHA_TLSLDM)
4319 r_symndx = 0;
4321 if (r_symndx < symtab_hdr->sh_info)
4323 asection *msec;
4324 sym = local_syms + r_symndx;
4325 sec = local_sections[r_symndx];
4326 msec = sec;
4327 value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
4329 /* If this is a tp-relative relocation against sym 0,
4330 this is hackery from relax_section. Force the value to
4331 be the tls base. */
4332 if (r_symndx == 0
4333 && (r_type == R_ALPHA_TLSLDM
4334 || r_type == R_ALPHA_GOTTPREL
4335 || r_type == R_ALPHA_TPREL64
4336 || r_type == R_ALPHA_TPRELHI
4337 || r_type == R_ALPHA_TPRELLO
4338 || r_type == R_ALPHA_TPREL16))
4339 value = tp_base;
4341 if (local_got_entries)
4342 gotent = local_got_entries[r_symndx];
4343 else
4344 gotent = NULL;
4346 /* Need to adjust local GOT entries' addends for SEC_MERGE
4347 unless it has been done already. */
4348 if ((sec->flags & SEC_MERGE)
4349 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
4350 && sec->sec_info_type == ELF_INFO_TYPE_MERGE
4351 && gotent
4352 && !gotent->reloc_xlated)
4354 struct alpha_elf_got_entry *ent;
4356 for (ent = gotent; ent; ent = ent->next)
4358 ent->reloc_xlated = 1;
4359 if (ent->use_count == 0)
4360 continue;
4361 msec = sec;
4362 ent->addend =
4363 _bfd_merged_section_offset (output_bfd, &msec,
4364 elf_section_data (sec)->
4365 sec_info,
4366 sym->st_value + ent->addend);
4367 ent->addend -= sym->st_value;
4368 ent->addend += msec->output_section->vma
4369 + msec->output_offset
4370 - sec->output_section->vma
4371 - sec->output_offset;
4375 dynamic_symbol_p = FALSE;
4377 else
4379 bfd_boolean warned;
4380 bfd_boolean unresolved_reloc;
4381 struct elf_link_hash_entry *hh;
4382 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
4384 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4385 r_symndx, symtab_hdr, sym_hashes,
4386 hh, sec, value,
4387 unresolved_reloc, warned);
4389 if (warned)
4390 continue;
4392 if (value == 0
4393 && ! unresolved_reloc
4394 && hh->root.type == bfd_link_hash_undefweak)
4395 undef_weak_ref = TRUE;
4397 h = (struct alpha_elf_link_hash_entry *) hh;
4398 dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
4399 gotent = h->got_entries;
4402 addend = rel->r_addend;
4403 value += addend;
4405 /* Search for the proper got entry. */
4406 for (; gotent ; gotent = gotent->next)
4407 if (gotent->gotobj == gotobj
4408 && gotent->reloc_type == r_type
4409 && gotent->addend == addend)
4410 break;
4412 switch (r_type)
4414 case R_ALPHA_GPDISP:
4416 bfd_byte *p_ldah, *p_lda;
4418 BFD_ASSERT(gp != 0);
4420 value = (input_section->output_section->vma
4421 + input_section->output_offset
4422 + rel->r_offset);
4424 p_ldah = contents + rel->r_offset;
4425 p_lda = p_ldah + rel->r_addend;
4427 r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value,
4428 p_ldah, p_lda);
4430 break;
4432 case R_ALPHA_LITERAL:
4433 BFD_ASSERT(sgot != NULL);
4434 BFD_ASSERT(gp != 0);
4435 BFD_ASSERT(gotent != NULL);
4436 BFD_ASSERT(gotent->use_count >= 1);
4438 if (!gotent->reloc_done)
4440 gotent->reloc_done = 1;
4442 bfd_put_64 (output_bfd, value,
4443 sgot->contents + gotent->got_offset);
4445 /* If the symbol has been forced local, output a
4446 RELATIVE reloc, otherwise it will be handled in
4447 finish_dynamic_symbol. */
4448 if (info->shared && !dynamic_symbol_p)
4449 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4450 gotent->got_offset, 0,
4451 R_ALPHA_RELATIVE, value);
4454 value = (sgot->output_section->vma
4455 + sgot->output_offset
4456 + gotent->got_offset);
4457 value -= gp;
4458 goto default_reloc;
4460 case R_ALPHA_GPREL32:
4461 /* If the target section was a removed linkonce section,
4462 r_symndx will be zero. In this case, assume that the
4463 switch will not be used, so don't fill it in. If we
4464 do nothing here, we'll get relocation truncated messages,
4465 due to the placement of the application above 4GB. */
4466 if (r_symndx == 0)
4468 r = bfd_reloc_ok;
4469 break;
4471 /* FALLTHRU */
4473 case R_ALPHA_GPREL16:
4474 case R_ALPHA_GPRELLOW:
4475 if (dynamic_symbol_p)
4477 (*_bfd_error_handler)
4478 (_("%B: gp-relative relocation against dynamic symbol %s"),
4479 input_bfd, h->root.root.root.string);
4480 ret_val = FALSE;
4482 BFD_ASSERT(gp != 0);
4483 value -= gp;
4484 goto default_reloc;
4486 case R_ALPHA_GPRELHIGH:
4487 if (dynamic_symbol_p)
4489 (*_bfd_error_handler)
4490 (_("%B: gp-relative relocation against dynamic symbol %s"),
4491 input_bfd, h->root.root.root.string);
4492 ret_val = FALSE;
4494 BFD_ASSERT(gp != 0);
4495 value -= gp;
4496 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4497 goto default_reloc;
4499 case R_ALPHA_HINT:
4500 /* A call to a dynamic symbol is definitely out of range of
4501 the 16-bit displacement. Don't bother writing anything. */
4502 if (dynamic_symbol_p)
4504 r = bfd_reloc_ok;
4505 break;
4507 /* The regular PC-relative stuff measures from the start of
4508 the instruction rather than the end. */
4509 value -= 4;
4510 goto default_reloc;
4512 case R_ALPHA_BRADDR:
4513 if (dynamic_symbol_p)
4515 (*_bfd_error_handler)
4516 (_("%B: pc-relative relocation against dynamic symbol %s"),
4517 input_bfd, h->root.root.root.string);
4518 ret_val = FALSE;
4520 /* The regular PC-relative stuff measures from the start of
4521 the instruction rather than the end. */
4522 value -= 4;
4523 goto default_reloc;
4525 case R_ALPHA_BRSGP:
4527 int other;
4528 const char *name;
4530 /* The regular PC-relative stuff measures from the start of
4531 the instruction rather than the end. */
4532 value -= 4;
4534 /* The source and destination gp must be the same. Note that
4535 the source will always have an assigned gp, since we forced
4536 one in check_relocs, but that the destination may not, as
4537 it might not have had any relocations at all. Also take
4538 care not to crash if H is an undefined symbol. */
4539 if (h != NULL && sec != NULL
4540 && alpha_elf_tdata (sec->owner)->gotobj
4541 && gotobj != alpha_elf_tdata (sec->owner)->gotobj)
4543 (*_bfd_error_handler)
4544 (_("%B: change in gp: BRSGP %s"),
4545 input_bfd, h->root.root.root.string);
4546 ret_val = FALSE;
4549 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4550 if (h != NULL)
4551 other = h->root.other;
4552 else
4553 other = sym->st_other;
4554 switch (other & STO_ALPHA_STD_GPLOAD)
4556 case STO_ALPHA_NOPV:
4557 break;
4558 case STO_ALPHA_STD_GPLOAD:
4559 value += 8;
4560 break;
4561 default:
4562 if (h != NULL)
4563 name = h->root.root.root.string;
4564 else
4566 name = (bfd_elf_string_from_elf_section
4567 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4568 if (name == NULL)
4569 name = _("<unknown>");
4570 else if (name[0] == 0)
4571 name = bfd_section_name (input_bfd, sec);
4573 (*_bfd_error_handler)
4574 (_("%B: !samegp reloc against symbol without .prologue: %s"),
4575 input_bfd, name);
4576 ret_val = FALSE;
4577 break;
4580 goto default_reloc;
4583 case R_ALPHA_REFLONG:
4584 case R_ALPHA_REFQUAD:
4585 case R_ALPHA_DTPREL64:
4586 case R_ALPHA_TPREL64:
4588 long dynindx, dyntype = r_type;
4589 bfd_vma dynaddend;
4591 /* Careful here to remember RELATIVE relocations for global
4592 variables for symbolic shared objects. */
4594 if (dynamic_symbol_p)
4596 BFD_ASSERT(h->root.dynindx != -1);
4597 dynindx = h->root.dynindx;
4598 dynaddend = addend;
4599 addend = 0, value = 0;
4601 else if (r_type == R_ALPHA_DTPREL64)
4603 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4604 value -= dtp_base;
4605 goto default_reloc;
4607 else if (r_type == R_ALPHA_TPREL64)
4609 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4610 if (!info->shared)
4612 value -= tp_base;
4613 goto default_reloc;
4615 dynindx = 0;
4616 dynaddend = value - dtp_base;
4618 else if (info->shared
4619 && r_symndx != 0
4620 && (input_section->flags & SEC_ALLOC))
4622 if (r_type == R_ALPHA_REFLONG)
4624 (*_bfd_error_handler)
4625 (_("%B: unhandled dynamic relocation against %s"),
4626 input_bfd,
4627 h->root.root.root.string);
4628 ret_val = FALSE;
4630 dynindx = 0;
4631 dyntype = R_ALPHA_RELATIVE;
4632 dynaddend = value;
4634 else
4635 goto default_reloc;
4637 elf64_alpha_emit_dynrel (output_bfd, info, input_section,
4638 srel, rel->r_offset, dynindx,
4639 dyntype, dynaddend);
4641 goto default_reloc;
4643 case R_ALPHA_SREL16:
4644 case R_ALPHA_SREL32:
4645 case R_ALPHA_SREL64:
4646 if (dynamic_symbol_p)
4648 (*_bfd_error_handler)
4649 (_("%B: pc-relative relocation against dynamic symbol %s"),
4650 input_bfd, h->root.root.root.string);
4651 ret_val = FALSE;
4654 /* ??? .eh_frame references to discarded sections will be smashed
4655 to relocations against SHN_UNDEF. The .eh_frame format allows
4656 NULL to be encoded as 0 in any format, so this works here. */
4657 if (r_symndx == 0)
4658 howto = (elf64_alpha_howto_table
4659 + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
4660 goto default_reloc;
4662 case R_ALPHA_TLSLDM:
4663 /* Ignore the symbol for the relocation. The result is always
4664 the current module. */
4665 dynamic_symbol_p = 0;
4666 /* FALLTHRU */
4668 case R_ALPHA_TLSGD:
4669 if (!gotent->reloc_done)
4671 gotent->reloc_done = 1;
4673 /* Note that the module index for the main program is 1. */
4674 bfd_put_64 (output_bfd, !info->shared && !dynamic_symbol_p,
4675 sgot->contents + gotent->got_offset);
4677 /* If the symbol has been forced local, output a
4678 DTPMOD64 reloc, otherwise it will be handled in
4679 finish_dynamic_symbol. */
4680 if (info->shared && !dynamic_symbol_p)
4681 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4682 gotent->got_offset, 0,
4683 R_ALPHA_DTPMOD64, 0);
4685 if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM)
4686 value = 0;
4687 else
4689 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4690 value -= dtp_base;
4692 bfd_put_64 (output_bfd, value,
4693 sgot->contents + gotent->got_offset + 8);
4696 value = (sgot->output_section->vma
4697 + sgot->output_offset
4698 + gotent->got_offset);
4699 value -= gp;
4700 goto default_reloc;
4702 case R_ALPHA_DTPRELHI:
4703 case R_ALPHA_DTPRELLO:
4704 case R_ALPHA_DTPREL16:
4705 if (dynamic_symbol_p)
4707 (*_bfd_error_handler)
4708 (_("%B: dtp-relative relocation against dynamic symbol %s"),
4709 input_bfd, h->root.root.root.string);
4710 ret_val = FALSE;
4712 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4713 value -= dtp_base;
4714 if (r_type == R_ALPHA_DTPRELHI)
4715 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4716 goto default_reloc;
4718 case R_ALPHA_TPRELHI:
4719 case R_ALPHA_TPRELLO:
4720 case R_ALPHA_TPREL16:
4721 if (info->shared)
4723 (*_bfd_error_handler)
4724 (_("%B: TLS local exec code cannot be linked into shared objects"),
4725 input_bfd);
4726 ret_val = FALSE;
4728 else if (dynamic_symbol_p)
4730 (*_bfd_error_handler)
4731 (_("%B: tp-relative relocation against dynamic symbol %s"),
4732 input_bfd, h->root.root.root.string);
4733 ret_val = FALSE;
4735 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4736 value -= tp_base;
4737 if (r_type == R_ALPHA_TPRELHI)
4738 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4739 goto default_reloc;
4741 case R_ALPHA_GOTDTPREL:
4742 case R_ALPHA_GOTTPREL:
4743 BFD_ASSERT(sgot != NULL);
4744 BFD_ASSERT(gp != 0);
4745 BFD_ASSERT(gotent != NULL);
4746 BFD_ASSERT(gotent->use_count >= 1);
4748 if (!gotent->reloc_done)
4750 gotent->reloc_done = 1;
4752 if (dynamic_symbol_p)
4753 value = 0;
4754 else
4756 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4757 if (r_type == R_ALPHA_GOTDTPREL)
4758 value -= dtp_base;
4759 else if (!info->shared)
4760 value -= tp_base;
4761 else
4763 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4764 gotent->got_offset, 0,
4765 R_ALPHA_TPREL64,
4766 value - dtp_base);
4767 value = 0;
4770 bfd_put_64 (output_bfd, value,
4771 sgot->contents + gotent->got_offset);
4774 value = (sgot->output_section->vma
4775 + sgot->output_offset
4776 + gotent->got_offset);
4777 value -= gp;
4778 goto default_reloc;
4780 default:
4781 default_reloc:
4782 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4783 contents, rel->r_offset, value, 0);
4784 break;
4787 switch (r)
4789 case bfd_reloc_ok:
4790 break;
4792 case bfd_reloc_overflow:
4794 const char *name;
4796 /* Don't warn if the overflow is due to pc relative reloc
4797 against discarded section. Section optimization code should
4798 handle it. */
4800 if (r_symndx < symtab_hdr->sh_info
4801 && sec != NULL && howto->pc_relative
4802 && elf_discarded_section (sec))
4803 break;
4805 if (h != NULL)
4806 name = NULL;
4807 else
4809 name = (bfd_elf_string_from_elf_section
4810 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4811 if (name == NULL)
4812 return FALSE;
4813 if (*name == '\0')
4814 name = bfd_section_name (input_bfd, sec);
4816 if (! ((*info->callbacks->reloc_overflow)
4817 (info, (h ? &h->root.root : NULL), name, howto->name,
4818 (bfd_vma) 0, input_bfd, input_section,
4819 rel->r_offset)))
4820 ret_val = FALSE;
4822 break;
4824 default:
4825 case bfd_reloc_outofrange:
4826 abort ();
4830 return ret_val;
4833 /* Finish up dynamic symbol handling. We set the contents of various
4834 dynamic sections here. */
4836 static bfd_boolean
4837 elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
4838 bfd *output_bfd;
4839 struct bfd_link_info *info;
4840 struct elf_link_hash_entry *h;
4841 Elf_Internal_Sym *sym;
4843 bfd *dynobj = elf_hash_table(info)->dynobj;
4845 if (h->plt.offset != MINUS_ONE)
4847 /* Fill in the .plt entry for this symbol. */
4848 asection *splt, *sgot, *srel;
4849 Elf_Internal_Rela outrel;
4850 bfd_byte *loc;
4851 bfd_vma got_addr, plt_addr;
4852 bfd_vma plt_index;
4853 struct alpha_elf_got_entry *gotent;
4855 BFD_ASSERT (h->dynindx != -1);
4857 /* The first .got entry will be updated by the .plt with the
4858 address of the target function. */
4859 gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
4860 BFD_ASSERT (gotent && gotent->addend == 0);
4862 splt = bfd_get_section_by_name (dynobj, ".plt");
4863 BFD_ASSERT (splt != NULL);
4864 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4865 BFD_ASSERT (srel != NULL);
4866 sgot = alpha_elf_tdata (gotent->gotobj)->got;
4867 BFD_ASSERT (sgot != NULL);
4869 got_addr = (sgot->output_section->vma
4870 + sgot->output_offset
4871 + gotent->got_offset);
4872 plt_addr = (splt->output_section->vma
4873 + splt->output_offset
4874 + h->plt.offset);
4876 plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
4878 /* Fill in the entry in the procedure linkage table. */
4880 bfd_vma insn1, insn2, insn3;
4882 insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff);
4883 insn2 = PLT_ENTRY_WORD2;
4884 insn3 = PLT_ENTRY_WORD3;
4886 bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset);
4887 bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4);
4888 bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8);
4891 /* Fill in the entry in the .rela.plt section. */
4892 outrel.r_offset = got_addr;
4893 outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
4894 outrel.r_addend = 0;
4896 loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
4897 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
4899 if (!h->def_regular)
4901 /* Mark the symbol as undefined, rather than as defined in the
4902 .plt section. Leave the value alone. */
4903 sym->st_shndx = SHN_UNDEF;
4906 /* Fill in the entries in the .got. */
4907 bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset);
4909 /* Subsequent .got entries will continue to bounce through the .plt. */
4910 if (gotent->next)
4912 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4913 BFD_ASSERT (! info->shared || srel != NULL);
4915 gotent = gotent->next;
4918 sgot = alpha_elf_tdata(gotent->gotobj)->got;
4919 BFD_ASSERT(sgot != NULL);
4920 BFD_ASSERT(gotent->addend == 0);
4922 bfd_put_64 (output_bfd, plt_addr,
4923 sgot->contents + gotent->got_offset);
4925 if (info->shared)
4926 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4927 gotent->got_offset, 0,
4928 R_ALPHA_RELATIVE, plt_addr);
4930 gotent = gotent->next;
4932 while (gotent != NULL);
4935 else if (alpha_elf_dynamic_symbol_p (h, info))
4937 /* Fill in the dynamic relocations for this symbol's .got entries. */
4938 asection *srel;
4939 struct alpha_elf_got_entry *gotent;
4941 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4942 BFD_ASSERT (srel != NULL);
4944 for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
4945 gotent != NULL;
4946 gotent = gotent->next)
4948 asection *sgot;
4949 long r_type;
4951 if (gotent->use_count == 0)
4952 continue;
4954 sgot = alpha_elf_tdata (gotent->gotobj)->got;
4956 r_type = gotent->reloc_type;
4957 switch (r_type)
4959 case R_ALPHA_LITERAL:
4960 r_type = R_ALPHA_GLOB_DAT;
4961 break;
4962 case R_ALPHA_TLSGD:
4963 r_type = R_ALPHA_DTPMOD64;
4964 break;
4965 case R_ALPHA_GOTDTPREL:
4966 r_type = R_ALPHA_DTPREL64;
4967 break;
4968 case R_ALPHA_GOTTPREL:
4969 r_type = R_ALPHA_TPREL64;
4970 break;
4971 case R_ALPHA_TLSLDM:
4972 default:
4973 abort ();
4976 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4977 gotent->got_offset, h->dynindx,
4978 r_type, gotent->addend);
4980 if (gotent->reloc_type == R_ALPHA_TLSGD)
4981 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4982 gotent->got_offset + 8, h->dynindx,
4983 R_ALPHA_DTPREL64, gotent->addend);
4987 /* Mark some specially defined symbols as absolute. */
4988 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4989 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4990 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4991 sym->st_shndx = SHN_ABS;
4993 return TRUE;
4996 /* Finish up the dynamic sections. */
4998 static bfd_boolean
4999 elf64_alpha_finish_dynamic_sections (output_bfd, info)
5000 bfd *output_bfd;
5001 struct bfd_link_info *info;
5003 bfd *dynobj;
5004 asection *sdyn;
5006 dynobj = elf_hash_table (info)->dynobj;
5007 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5009 if (elf_hash_table (info)->dynamic_sections_created)
5011 asection *splt;
5012 Elf64_External_Dyn *dyncon, *dynconend;
5014 splt = bfd_get_section_by_name (dynobj, ".plt");
5015 BFD_ASSERT (splt != NULL && sdyn != NULL);
5017 dyncon = (Elf64_External_Dyn *) sdyn->contents;
5018 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
5019 for (; dyncon < dynconend; dyncon++)
5021 Elf_Internal_Dyn dyn;
5022 const char *name;
5023 asection *s;
5025 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
5027 switch (dyn.d_tag)
5029 case DT_PLTGOT:
5030 name = ".plt";
5031 goto get_vma;
5032 case DT_PLTRELSZ:
5033 name = ".rela.plt";
5034 goto get_size;
5035 case DT_JMPREL:
5036 name = ".rela.plt";
5037 goto get_vma;
5039 case DT_RELASZ:
5040 /* My interpretation of the TIS v1.1 ELF document indicates
5041 that RELASZ should not include JMPREL. This is not what
5042 the rest of the BFD does. It is, however, what the
5043 glibc ld.so wants. Do this fixup here until we found
5044 out who is right. */
5045 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
5046 if (s)
5047 dyn.d_un.d_val -= s->size;
5048 break;
5050 get_vma:
5051 s = bfd_get_section_by_name (output_bfd, name);
5052 dyn.d_un.d_ptr = (s ? s->vma : 0);
5053 break;
5055 get_size:
5056 s = bfd_get_section_by_name (output_bfd, name);
5057 dyn.d_un.d_val = s->size;
5058 break;
5061 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
5064 /* Initialize the PLT0 entry. */
5065 if (splt->size > 0)
5067 bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents);
5068 bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4);
5069 bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8);
5070 bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12);
5072 /* The next two words will be filled in by ld.so */
5073 bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 16);
5074 bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 24);
5076 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0;
5080 return TRUE;
5083 /* We need to use a special link routine to handle the .mdebug section.
5084 We need to merge all instances of these sections together, not write
5085 them all out sequentially. */
5087 static bfd_boolean
5088 elf64_alpha_final_link (abfd, info)
5089 bfd *abfd;
5090 struct bfd_link_info *info;
5092 asection *o;
5093 struct bfd_link_order *p;
5094 asection *mdebug_sec;
5095 struct ecoff_debug_info debug;
5096 const struct ecoff_debug_swap *swap
5097 = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
5098 HDRR *symhdr = &debug.symbolic_header;
5099 PTR mdebug_handle = NULL;
5101 /* Go through the sections and collect the mdebug information. */
5102 mdebug_sec = NULL;
5103 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
5105 if (strcmp (o->name, ".mdebug") == 0)
5107 struct extsym_info einfo;
5109 /* We have found the .mdebug section in the output file.
5110 Look through all the link_orders comprising it and merge
5111 the information together. */
5112 symhdr->magic = swap->sym_magic;
5113 /* FIXME: What should the version stamp be? */
5114 symhdr->vstamp = 0;
5115 symhdr->ilineMax = 0;
5116 symhdr->cbLine = 0;
5117 symhdr->idnMax = 0;
5118 symhdr->ipdMax = 0;
5119 symhdr->isymMax = 0;
5120 symhdr->ioptMax = 0;
5121 symhdr->iauxMax = 0;
5122 symhdr->issMax = 0;
5123 symhdr->issExtMax = 0;
5124 symhdr->ifdMax = 0;
5125 symhdr->crfd = 0;
5126 symhdr->iextMax = 0;
5128 /* We accumulate the debugging information itself in the
5129 debug_info structure. */
5130 debug.line = NULL;
5131 debug.external_dnr = NULL;
5132 debug.external_pdr = NULL;
5133 debug.external_sym = NULL;
5134 debug.external_opt = NULL;
5135 debug.external_aux = NULL;
5136 debug.ss = NULL;
5137 debug.ssext = debug.ssext_end = NULL;
5138 debug.external_fdr = NULL;
5139 debug.external_rfd = NULL;
5140 debug.external_ext = debug.external_ext_end = NULL;
5142 mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
5143 if (mdebug_handle == (PTR) NULL)
5144 return FALSE;
5146 if (1)
5148 asection *s;
5149 EXTR esym;
5150 bfd_vma last = 0;
5151 unsigned int i;
5152 static const char * const name[] =
5154 ".text", ".init", ".fini", ".data",
5155 ".rodata", ".sdata", ".sbss", ".bss"
5157 static const int sc[] = { scText, scInit, scFini, scData,
5158 scRData, scSData, scSBss, scBss };
5160 esym.jmptbl = 0;
5161 esym.cobol_main = 0;
5162 esym.weakext = 0;
5163 esym.reserved = 0;
5164 esym.ifd = ifdNil;
5165 esym.asym.iss = issNil;
5166 esym.asym.st = stLocal;
5167 esym.asym.reserved = 0;
5168 esym.asym.index = indexNil;
5169 for (i = 0; i < 8; i++)
5171 esym.asym.sc = sc[i];
5172 s = bfd_get_section_by_name (abfd, name[i]);
5173 if (s != NULL)
5175 esym.asym.value = s->vma;
5176 last = s->vma + s->size;
5178 else
5179 esym.asym.value = last;
5181 if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
5182 name[i], &esym))
5183 return FALSE;
5187 for (p = o->link_order_head;
5188 p != (struct bfd_link_order *) NULL;
5189 p = p->next)
5191 asection *input_section;
5192 bfd *input_bfd;
5193 const struct ecoff_debug_swap *input_swap;
5194 struct ecoff_debug_info input_debug;
5195 char *eraw_src;
5196 char *eraw_end;
5198 if (p->type != bfd_indirect_link_order)
5200 if (p->type == bfd_data_link_order)
5201 continue;
5202 abort ();
5205 input_section = p->u.indirect.section;
5206 input_bfd = input_section->owner;
5208 if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
5209 || (get_elf_backend_data (input_bfd)
5210 ->elf_backend_ecoff_debug_swap) == NULL)
5212 /* I don't know what a non ALPHA ELF bfd would be
5213 doing with a .mdebug section, but I don't really
5214 want to deal with it. */
5215 continue;
5218 input_swap = (get_elf_backend_data (input_bfd)
5219 ->elf_backend_ecoff_debug_swap);
5221 BFD_ASSERT (p->size == input_section->size);
5223 /* The ECOFF linking code expects that we have already
5224 read in the debugging information and set up an
5225 ecoff_debug_info structure, so we do that now. */
5226 if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
5227 &input_debug))
5228 return FALSE;
5230 if (! (bfd_ecoff_debug_accumulate
5231 (mdebug_handle, abfd, &debug, swap, input_bfd,
5232 &input_debug, input_swap, info)))
5233 return FALSE;
5235 /* Loop through the external symbols. For each one with
5236 interesting information, try to find the symbol in
5237 the linker global hash table and save the information
5238 for the output external symbols. */
5239 eraw_src = input_debug.external_ext;
5240 eraw_end = (eraw_src
5241 + (input_debug.symbolic_header.iextMax
5242 * input_swap->external_ext_size));
5243 for (;
5244 eraw_src < eraw_end;
5245 eraw_src += input_swap->external_ext_size)
5247 EXTR ext;
5248 const char *name;
5249 struct alpha_elf_link_hash_entry *h;
5251 (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
5252 if (ext.asym.sc == scNil
5253 || ext.asym.sc == scUndefined
5254 || ext.asym.sc == scSUndefined)
5255 continue;
5257 name = input_debug.ssext + ext.asym.iss;
5258 h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info),
5259 name, FALSE, FALSE, TRUE);
5260 if (h == NULL || h->esym.ifd != -2)
5261 continue;
5263 if (ext.ifd != -1)
5265 BFD_ASSERT (ext.ifd
5266 < input_debug.symbolic_header.ifdMax);
5267 ext.ifd = input_debug.ifdmap[ext.ifd];
5270 h->esym = ext;
5273 /* Free up the information we just read. */
5274 free (input_debug.line);
5275 free (input_debug.external_dnr);
5276 free (input_debug.external_pdr);
5277 free (input_debug.external_sym);
5278 free (input_debug.external_opt);
5279 free (input_debug.external_aux);
5280 free (input_debug.ss);
5281 free (input_debug.ssext);
5282 free (input_debug.external_fdr);
5283 free (input_debug.external_rfd);
5284 free (input_debug.external_ext);
5286 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5287 elf_link_input_bfd ignores this section. */
5288 input_section->flags &=~ SEC_HAS_CONTENTS;
5291 /* Build the external symbol information. */
5292 einfo.abfd = abfd;
5293 einfo.info = info;
5294 einfo.debug = &debug;
5295 einfo.swap = swap;
5296 einfo.failed = FALSE;
5297 elf_link_hash_traverse (elf_hash_table (info),
5298 elf64_alpha_output_extsym,
5299 (PTR) &einfo);
5300 if (einfo.failed)
5301 return FALSE;
5303 /* Set the size of the .mdebug section. */
5304 o->size = bfd_ecoff_debug_size (abfd, &debug, swap);
5306 /* Skip this section later on (I don't think this currently
5307 matters, but someday it might). */
5308 o->link_order_head = (struct bfd_link_order *) NULL;
5310 mdebug_sec = o;
5314 /* Invoke the regular ELF backend linker to do all the work. */
5315 if (! bfd_elf_final_link (abfd, info))
5316 return FALSE;
5318 /* Now write out the computed sections. */
5320 /* The .got subsections... */
5322 bfd *i, *dynobj = elf_hash_table(info)->dynobj;
5323 for (i = alpha_elf_hash_table(info)->got_list;
5324 i != NULL;
5325 i = alpha_elf_tdata(i)->got_link_next)
5327 asection *sgot;
5329 /* elf_bfd_final_link already did everything in dynobj. */
5330 if (i == dynobj)
5331 continue;
5333 sgot = alpha_elf_tdata(i)->got;
5334 if (! bfd_set_section_contents (abfd, sgot->output_section,
5335 sgot->contents,
5336 (file_ptr) sgot->output_offset,
5337 sgot->size))
5338 return FALSE;
5342 if (mdebug_sec != (asection *) NULL)
5344 BFD_ASSERT (abfd->output_has_begun);
5345 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
5346 swap, info,
5347 mdebug_sec->filepos))
5348 return FALSE;
5350 bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
5353 return TRUE;
5356 static enum elf_reloc_type_class
5357 elf64_alpha_reloc_type_class (rela)
5358 const Elf_Internal_Rela *rela;
5360 switch ((int) ELF64_R_TYPE (rela->r_info))
5362 case R_ALPHA_RELATIVE:
5363 return reloc_class_relative;
5364 case R_ALPHA_JMP_SLOT:
5365 return reloc_class_plt;
5366 case R_ALPHA_COPY:
5367 return reloc_class_copy;
5368 default:
5369 return reloc_class_normal;
5373 static struct bfd_elf_special_section const elf64_alpha_special_sections[]=
5375 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
5376 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
5377 { NULL, 0, 0, 0, 0 }
5380 /* ECOFF swapping routines. These are used when dealing with the
5381 .mdebug section, which is in the ECOFF debugging format. Copied
5382 from elf32-mips.c. */
5383 static const struct ecoff_debug_swap
5384 elf64_alpha_ecoff_debug_swap =
5386 /* Symbol table magic number. */
5387 magicSym2,
5388 /* Alignment of debugging information. E.g., 4. */
5390 /* Sizes of external symbolic information. */
5391 sizeof (struct hdr_ext),
5392 sizeof (struct dnr_ext),
5393 sizeof (struct pdr_ext),
5394 sizeof (struct sym_ext),
5395 sizeof (struct opt_ext),
5396 sizeof (struct fdr_ext),
5397 sizeof (struct rfd_ext),
5398 sizeof (struct ext_ext),
5399 /* Functions to swap in external symbolic data. */
5400 ecoff_swap_hdr_in,
5401 ecoff_swap_dnr_in,
5402 ecoff_swap_pdr_in,
5403 ecoff_swap_sym_in,
5404 ecoff_swap_opt_in,
5405 ecoff_swap_fdr_in,
5406 ecoff_swap_rfd_in,
5407 ecoff_swap_ext_in,
5408 _bfd_ecoff_swap_tir_in,
5409 _bfd_ecoff_swap_rndx_in,
5410 /* Functions to swap out external symbolic data. */
5411 ecoff_swap_hdr_out,
5412 ecoff_swap_dnr_out,
5413 ecoff_swap_pdr_out,
5414 ecoff_swap_sym_out,
5415 ecoff_swap_opt_out,
5416 ecoff_swap_fdr_out,
5417 ecoff_swap_rfd_out,
5418 ecoff_swap_ext_out,
5419 _bfd_ecoff_swap_tir_out,
5420 _bfd_ecoff_swap_rndx_out,
5421 /* Function to read in symbolic data. */
5422 elf64_alpha_read_ecoff_info
5425 /* Use a non-standard hash bucket size of 8. */
5427 static const struct elf_size_info alpha_elf_size_info =
5429 sizeof (Elf64_External_Ehdr),
5430 sizeof (Elf64_External_Phdr),
5431 sizeof (Elf64_External_Shdr),
5432 sizeof (Elf64_External_Rel),
5433 sizeof (Elf64_External_Rela),
5434 sizeof (Elf64_External_Sym),
5435 sizeof (Elf64_External_Dyn),
5436 sizeof (Elf_External_Note),
5439 64, 3,
5440 ELFCLASS64, EV_CURRENT,
5441 bfd_elf64_write_out_phdrs,
5442 bfd_elf64_write_shdrs_and_ehdr,
5443 bfd_elf64_write_relocs,
5444 bfd_elf64_swap_symbol_in,
5445 bfd_elf64_swap_symbol_out,
5446 bfd_elf64_slurp_reloc_table,
5447 bfd_elf64_slurp_symbol_table,
5448 bfd_elf64_swap_dyn_in,
5449 bfd_elf64_swap_dyn_out,
5450 bfd_elf64_swap_reloc_in,
5451 bfd_elf64_swap_reloc_out,
5452 bfd_elf64_swap_reloca_in,
5453 bfd_elf64_swap_reloca_out
5456 #define TARGET_LITTLE_SYM bfd_elf64_alpha_vec
5457 #define TARGET_LITTLE_NAME "elf64-alpha"
5458 #define ELF_ARCH bfd_arch_alpha
5459 #define ELF_MACHINE_CODE EM_ALPHA
5460 #define ELF_MAXPAGESIZE 0x10000
5462 #define bfd_elf64_bfd_link_hash_table_create \
5463 elf64_alpha_bfd_link_hash_table_create
5465 #define bfd_elf64_bfd_reloc_type_lookup \
5466 elf64_alpha_bfd_reloc_type_lookup
5467 #define elf_info_to_howto \
5468 elf64_alpha_info_to_howto
5470 #define bfd_elf64_mkobject \
5471 elf64_alpha_mkobject
5472 #define elf_backend_object_p \
5473 elf64_alpha_object_p
5475 #define elf_backend_section_from_shdr \
5476 elf64_alpha_section_from_shdr
5477 #define elf_backend_section_flags \
5478 elf64_alpha_section_flags
5479 #define elf_backend_fake_sections \
5480 elf64_alpha_fake_sections
5482 #define bfd_elf64_bfd_is_local_label_name \
5483 elf64_alpha_is_local_label_name
5484 #define bfd_elf64_find_nearest_line \
5485 elf64_alpha_find_nearest_line
5486 #define bfd_elf64_bfd_relax_section \
5487 elf64_alpha_relax_section
5489 #define elf_backend_add_symbol_hook \
5490 elf64_alpha_add_symbol_hook
5491 #define elf_backend_check_relocs \
5492 elf64_alpha_check_relocs
5493 #define elf_backend_create_dynamic_sections \
5494 elf64_alpha_create_dynamic_sections
5495 #define elf_backend_adjust_dynamic_symbol \
5496 elf64_alpha_adjust_dynamic_symbol
5497 #define elf_backend_always_size_sections \
5498 elf64_alpha_always_size_sections
5499 #define elf_backend_size_dynamic_sections \
5500 elf64_alpha_size_dynamic_sections
5501 #define elf_backend_relocate_section \
5502 elf64_alpha_relocate_section
5503 #define elf_backend_finish_dynamic_symbol \
5504 elf64_alpha_finish_dynamic_symbol
5505 #define elf_backend_finish_dynamic_sections \
5506 elf64_alpha_finish_dynamic_sections
5507 #define bfd_elf64_bfd_final_link \
5508 elf64_alpha_final_link
5509 #define elf_backend_reloc_type_class \
5510 elf64_alpha_reloc_type_class
5512 #define elf_backend_ecoff_debug_swap \
5513 &elf64_alpha_ecoff_debug_swap
5515 #define elf_backend_size_info \
5516 alpha_elf_size_info
5518 #define elf_backend_special_sections \
5519 elf64_alpha_special_sections
5521 /* A few constants that determine how the .plt section is set up. */
5522 #define elf_backend_want_got_plt 0
5523 #define elf_backend_plt_readonly 0
5524 #define elf_backend_want_plt_sym 1
5525 #define elf_backend_got_header_size 0
5527 #include "elf64-target.h"
5529 /* FreeBSD support. */
5531 #undef TARGET_LITTLE_SYM
5532 #define TARGET_LITTLE_SYM bfd_elf64_alpha_freebsd_vec
5533 #undef TARGET_LITTLE_NAME
5534 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5536 /* The kernel recognizes executables as valid only if they carry a
5537 "FreeBSD" label in the ELF header. So we put this label on all
5538 executables and (for simplicity) also all other object files. */
5540 static void elf64_alpha_fbsd_post_process_headers
5541 PARAMS ((bfd *, struct bfd_link_info *));
5543 static void
5544 elf64_alpha_fbsd_post_process_headers (abfd, link_info)
5545 bfd * abfd;
5546 struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
5548 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
5550 i_ehdrp = elf_elfheader (abfd);
5552 /* Put an ABI label supported by FreeBSD >= 4.1. */
5553 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
5554 #ifdef OLD_FREEBSD_ABI_LABEL
5555 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5556 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5557 #endif
5560 #undef elf_backend_post_process_headers
5561 #define elf_backend_post_process_headers \
5562 elf64_alpha_fbsd_post_process_headers
5564 #undef elf64_bed
5565 #define elf64_bed elf64_alpha_fbsd_bed
5567 #include "elf64-target.h"