1 /* Alpha specific support for 64-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001
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. */
30 #include "elf/alpha.h"
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"
41 #include "coff/symconst.h"
42 #include "coff/ecoff.h"
43 #include "coff/alpha.h"
48 #include "ecoffswap.h"
50 static int 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
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 *, Elf64_Internal_Rela *));
71 static boolean elf64_alpha_mkobject
73 static boolean elf64_alpha_object_p
75 static boolean elf64_alpha_section_from_shdr
76 PARAMS((bfd *, Elf64_Internal_Shdr *, char *));
77 static boolean elf64_alpha_section_flags
78 PARAMS((flagword *, Elf64_Internal_Shdr *));
79 static boolean elf64_alpha_fake_sections
80 PARAMS((bfd *, Elf64_Internal_Shdr *, asection *));
81 static boolean elf64_alpha_create_got_section
82 PARAMS((bfd *, struct bfd_link_info *));
83 static boolean elf64_alpha_create_dynamic_sections
84 PARAMS((bfd *, struct bfd_link_info *));
86 static boolean elf64_alpha_read_ecoff_info
87 PARAMS((bfd *, asection *, struct ecoff_debug_info *));
88 static boolean elf64_alpha_is_local_label_name
89 PARAMS((bfd *, const char *));
90 static boolean elf64_alpha_find_nearest_line
91 PARAMS((bfd *, asection *, asymbol **, bfd_vma, const char **,
92 const char **, unsigned int *));
94 #if defined(__STDC__) || defined(ALMOST_STDC)
95 struct alpha_elf_link_hash_entry;
98 static boolean elf64_alpha_output_extsym
99 PARAMS((struct alpha_elf_link_hash_entry *, PTR));
101 static boolean elf64_alpha_can_merge_gots
102 PARAMS((bfd *, bfd *));
103 static void elf64_alpha_merge_gots
104 PARAMS((bfd *, bfd *));
105 static boolean elf64_alpha_calc_got_offsets_for_symbol
106 PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
107 static void elf64_alpha_calc_got_offsets PARAMS ((struct bfd_link_info *));
108 static boolean elf64_alpha_size_got_sections
109 PARAMS ((bfd *, struct bfd_link_info *));
110 static boolean elf64_alpha_always_size_sections
111 PARAMS ((bfd *, struct bfd_link_info *));
112 static boolean elf64_alpha_calc_dynrel_sizes
113 PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
114 static boolean elf64_alpha_add_symbol_hook
115 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
116 const char **, flagword *, asection **, bfd_vma *));
117 static boolean elf64_alpha_check_relocs
118 PARAMS((bfd *, struct bfd_link_info *, asection *sec,
119 const Elf_Internal_Rela *));
120 static boolean elf64_alpha_adjust_dynamic_symbol
121 PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *));
122 static boolean elf64_alpha_size_dynamic_sections
123 PARAMS((bfd *, struct bfd_link_info *));
124 static boolean elf64_alpha_relocate_section
125 PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
126 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
127 static boolean elf64_alpha_finish_dynamic_symbol
128 PARAMS((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
129 Elf_Internal_Sym *));
130 static boolean elf64_alpha_finish_dynamic_sections
131 PARAMS((bfd *, struct bfd_link_info *));
132 static boolean elf64_alpha_final_link
133 PARAMS((bfd *, struct bfd_link_info *));
134 static boolean elf64_alpha_merge_ind_symbols
135 PARAMS((struct alpha_elf_link_hash_entry *, PTR));
136 static Elf_Internal_Rela * elf64_alpha_find_reloc_at_ofs
137 PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma, int));
138 static enum elf_reloc_type_class elf64_alpha_reloc_type_class
141 struct alpha_elf_link_hash_entry
143 struct elf_link_hash_entry root;
145 /* External symbol information. */
148 /* Cumulative flags for all the .got entries. */
151 /* Contexts (LITUSE) in which a literal was referenced. */
152 #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
153 #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
154 #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
155 #define ALPHA_ELF_LINK_HASH_LU_FUNC 0x08
157 /* Used to implement multiple .got subsections. */
158 struct alpha_elf_got_entry
160 struct alpha_elf_got_entry *next;
162 /* which .got subsection? */
165 /* the addend in effect for this entry. */
166 bfd_signed_vma addend;
168 /* the .got offset for this entry. */
173 /* An additional flag. */
174 #define ALPHA_ELF_GOT_ENTRY_RELOCS_DONE 0x10
179 /* used to count non-got, non-plt relocations for delayed sizing
180 of relocation sections. */
181 struct alpha_elf_reloc_entry
183 struct alpha_elf_reloc_entry *next;
185 /* which .reloc section? */
188 /* what kind of relocation? */
191 /* is this against read-only section? */
192 unsigned int reltext : 1;
194 /* how many did we find? */
199 /* Alpha ELF linker hash table. */
201 struct alpha_elf_link_hash_table
203 struct elf_link_hash_table root;
205 /* The head of a list of .got subsections linked through
206 alpha_elf_tdata(abfd)->got_link_next. */
210 /* Look up an entry in a Alpha ELF linker hash table. */
212 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
213 ((struct alpha_elf_link_hash_entry *) \
214 elf_link_hash_lookup (&(table)->root, (string), (create), \
217 /* Traverse a Alpha ELF linker hash table. */
219 #define alpha_elf_link_hash_traverse(table, func, info) \
220 (elf_link_hash_traverse \
222 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
225 /* Get the Alpha ELF linker hash table from a link_info structure. */
227 #define alpha_elf_hash_table(p) \
228 ((struct alpha_elf_link_hash_table *) ((p)->hash))
230 /* Get the object's symbols as our own entry type. */
232 #define alpha_elf_sym_hashes(abfd) \
233 ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
235 /* Should we do dynamic things to this symbol? */
238 alpha_elf_dynamic_symbol_p (h, info)
239 struct elf_link_hash_entry *h;
240 struct bfd_link_info *info;
245 while (h->root.type == bfd_link_hash_indirect
246 || h->root.type == bfd_link_hash_warning)
247 h = (struct elf_link_hash_entry *) h->root.u.i.link;
249 if (h->dynindx == -1)
252 if (h->root.type == bfd_link_hash_undefweak
253 || h->root.type == bfd_link_hash_defweak)
256 switch (ELF_ST_VISIBILITY (h->other))
264 if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
269 if ((info->shared && !info->symbolic)
270 || ((h->elf_link_hash_flags
271 & (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR))
272 == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)))
278 /* Create an entry in a Alpha ELF linker hash table. */
280 static struct bfd_hash_entry *
281 elf64_alpha_link_hash_newfunc (entry, table, string)
282 struct bfd_hash_entry *entry;
283 struct bfd_hash_table *table;
286 struct alpha_elf_link_hash_entry *ret =
287 (struct alpha_elf_link_hash_entry *) entry;
289 /* Allocate the structure if it has not already been allocated by a
291 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
292 ret = ((struct alpha_elf_link_hash_entry *)
293 bfd_hash_allocate (table,
294 sizeof (struct alpha_elf_link_hash_entry)));
295 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
296 return (struct bfd_hash_entry *) ret;
298 /* Call the allocation method of the superclass. */
299 ret = ((struct alpha_elf_link_hash_entry *)
300 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
302 if (ret != (struct alpha_elf_link_hash_entry *) NULL)
304 /* Set local fields. */
305 memset (&ret->esym, 0, sizeof (EXTR));
306 /* We use -2 as a marker to indicate that the information has
307 not been set. -1 means there is no associated ifd. */
310 ret->got_entries = NULL;
311 ret->reloc_entries = NULL;
314 return (struct bfd_hash_entry *) ret;
317 /* Create a Alpha ELF linker hash table. */
319 static struct bfd_link_hash_table *
320 elf64_alpha_bfd_link_hash_table_create (abfd)
323 struct alpha_elf_link_hash_table *ret;
325 ret = ((struct alpha_elf_link_hash_table *)
326 bfd_zalloc (abfd, sizeof (struct alpha_elf_link_hash_table)));
327 if (ret == (struct alpha_elf_link_hash_table *) NULL)
330 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
331 elf64_alpha_link_hash_newfunc))
333 bfd_release (abfd, ret);
337 return &ret->root.root;
340 /* We have some private fields hanging off of the elf_tdata structure. */
342 struct alpha_elf_obj_tdata
344 struct elf_obj_tdata root;
346 /* For every input file, these are the got entries for that object's
348 struct alpha_elf_got_entry ** local_got_entries;
350 /* For every input file, this is the object that owns the got that
351 this input file uses. */
354 /* For every got, this is a linked list through the objects using this got */
355 bfd *in_got_link_next;
357 /* For every got, this is a link to the next got subsegment. */
360 /* For every got, this is the section. */
363 /* For every got, this is it's total number of *entries*. */
364 int total_got_entries;
366 /* For every got, this is the sum of the number of *entries* required
367 to hold all of the member object's local got. */
368 int n_local_got_entries;
371 #define alpha_elf_tdata(abfd) \
372 ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
375 elf64_alpha_mkobject (abfd)
378 abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata));
379 if (abfd->tdata.any == NULL)
385 elf64_alpha_object_p (abfd)
388 /* Allocate our special target data. */
389 struct alpha_elf_obj_tdata *new_tdata;
390 new_tdata = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata));
391 if (new_tdata == NULL)
393 new_tdata->root = *abfd->tdata.elf_obj_data;
394 abfd->tdata.any = new_tdata;
396 /* Set the right machine number for an Alpha ELF file. */
397 return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
400 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
401 from smaller values. Start with zero, widen, *then* decrement. */
402 #define MINUS_ONE (((bfd_vma)0) - 1)
404 #define SKIP_HOWTO(N) \
405 HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
407 static reloc_howto_type elf64_alpha_howto_table[] =
409 HOWTO (R_ALPHA_NONE, /* type */
411 0, /* size (0 = byte, 1 = short, 2 = long) */
413 true, /* pc_relative */
415 complain_overflow_dont, /* complain_on_overflow */
416 elf64_alpha_reloc_nil, /* special_function */
418 false, /* partial_inplace */
421 true), /* pcrel_offset */
423 /* A 32 bit reference to a symbol. */
424 HOWTO (R_ALPHA_REFLONG, /* type */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
428 false, /* pc_relative */
430 complain_overflow_bitfield, /* complain_on_overflow */
431 0, /* special_function */
432 "REFLONG", /* name */
433 false, /* partial_inplace */
434 0xffffffff, /* src_mask */
435 0xffffffff, /* dst_mask */
436 false), /* pcrel_offset */
438 /* A 64 bit reference to a symbol. */
439 HOWTO (R_ALPHA_REFQUAD, /* type */
441 4, /* size (0 = byte, 1 = short, 2 = long) */
443 false, /* pc_relative */
445 complain_overflow_bitfield, /* complain_on_overflow */
446 0, /* special_function */
447 "REFQUAD", /* name */
448 false, /* partial_inplace */
449 MINUS_ONE, /* src_mask */
450 MINUS_ONE, /* dst_mask */
451 false), /* pcrel_offset */
453 /* A 32 bit GP relative offset. This is just like REFLONG except
454 that when the value is used the value of the gp register will be
456 HOWTO (R_ALPHA_GPREL32, /* type */
458 2, /* size (0 = byte, 1 = short, 2 = long) */
460 false, /* pc_relative */
462 complain_overflow_bitfield, /* complain_on_overflow */
463 0, /* special_function */
464 "GPREL32", /* name */
465 false, /* partial_inplace */
466 0xffffffff, /* src_mask */
467 0xffffffff, /* dst_mask */
468 false), /* pcrel_offset */
470 /* Used for an instruction that refers to memory off the GP register. */
471 HOWTO (R_ALPHA_LITERAL, /* type */
473 1, /* size (0 = byte, 1 = short, 2 = long) */
475 false, /* pc_relative */
477 complain_overflow_signed, /* complain_on_overflow */
478 0, /* special_function */
479 "ELF_LITERAL", /* name */
480 false, /* partial_inplace */
481 0xffff, /* src_mask */
482 0xffff, /* dst_mask */
483 false), /* pcrel_offset */
485 /* This reloc only appears immediately following an ELF_LITERAL reloc.
486 It identifies a use of the literal. The symbol index is special:
487 1 means the literal address is in the base register of a memory
488 format instruction; 2 means the literal address is in the byte
489 offset register of a byte-manipulation instruction; 3 means the
490 literal address is in the target register of a jsr instruction.
491 This does not actually do any relocation. */
492 HOWTO (R_ALPHA_LITUSE, /* type */
494 1, /* size (0 = byte, 1 = short, 2 = long) */
496 false, /* pc_relative */
498 complain_overflow_dont, /* complain_on_overflow */
499 elf64_alpha_reloc_nil, /* special_function */
501 false, /* partial_inplace */
504 false), /* pcrel_offset */
506 /* Load the gp register. This is always used for a ldah instruction
507 which loads the upper 16 bits of the gp register. The symbol
508 index of the GPDISP instruction is an offset in bytes to the lda
509 instruction that loads the lower 16 bits. The value to use for
510 the relocation is the difference between the GP value and the
511 current location; the load will always be done against a register
512 holding the current address.
514 NOTE: Unlike ECOFF, partial in-place relocation is not done. If
515 any offset is present in the instructions, it is an offset from
516 the register to the ldah instruction. This lets us avoid any
517 stupid hackery like inventing a gp value to do partial relocation
518 against. Also unlike ECOFF, we do the whole relocation off of
519 the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
520 space consuming bit, that, since all the information was present
521 in the GPDISP_HI16 reloc. */
522 HOWTO (R_ALPHA_GPDISP, /* type */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
526 false, /* pc_relative */
528 complain_overflow_dont, /* complain_on_overflow */
529 elf64_alpha_reloc_gpdisp, /* special_function */
531 false, /* partial_inplace */
532 0xffff, /* src_mask */
533 0xffff, /* dst_mask */
534 true), /* pcrel_offset */
536 /* A 21 bit branch. */
537 HOWTO (R_ALPHA_BRADDR, /* type */
539 2, /* size (0 = byte, 1 = short, 2 = long) */
541 true, /* pc_relative */
543 complain_overflow_signed, /* complain_on_overflow */
544 0, /* special_function */
546 false, /* partial_inplace */
547 0x1fffff, /* src_mask */
548 0x1fffff, /* dst_mask */
549 true), /* pcrel_offset */
551 /* A hint for a jump to a register. */
552 HOWTO (R_ALPHA_HINT, /* type */
554 1, /* size (0 = byte, 1 = short, 2 = long) */
556 true, /* pc_relative */
558 complain_overflow_dont, /* complain_on_overflow */
559 0, /* special_function */
561 false, /* partial_inplace */
562 0x3fff, /* src_mask */
563 0x3fff, /* dst_mask */
564 true), /* pcrel_offset */
566 /* 16 bit PC relative offset. */
567 HOWTO (R_ALPHA_SREL16, /* type */
569 1, /* size (0 = byte, 1 = short, 2 = long) */
571 true, /* pc_relative */
573 complain_overflow_signed, /* complain_on_overflow */
574 0, /* special_function */
576 false, /* partial_inplace */
577 0xffff, /* src_mask */
578 0xffff, /* dst_mask */
579 true), /* pcrel_offset */
581 /* 32 bit PC relative offset. */
582 HOWTO (R_ALPHA_SREL32, /* type */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
586 true, /* pc_relative */
588 complain_overflow_signed, /* complain_on_overflow */
589 0, /* special_function */
591 false, /* partial_inplace */
592 0xffffffff, /* src_mask */
593 0xffffffff, /* dst_mask */
594 true), /* pcrel_offset */
596 /* A 64 bit PC relative offset. */
597 HOWTO (R_ALPHA_SREL64, /* type */
599 4, /* size (0 = byte, 1 = short, 2 = long) */
601 true, /* pc_relative */
603 complain_overflow_signed, /* complain_on_overflow */
604 0, /* special_function */
606 false, /* partial_inplace */
607 MINUS_ONE, /* src_mask */
608 MINUS_ONE, /* dst_mask */
609 true), /* pcrel_offset */
611 /* Skip 12 - 16; deprecated ECOFF relocs. */
618 /* The high 16 bits of the displacement from GP to the target. */
619 HOWTO (R_ALPHA_GPRELHIGH,
621 1, /* size (0 = byte, 1 = short, 2 = long) */
623 false, /* pc_relative */
625 complain_overflow_signed, /* complain_on_overflow */
626 0, /* special_function */
627 "GPRELHIGH", /* name */
628 false, /* partial_inplace */
629 0xffff, /* src_mask */
630 0xffff, /* dst_mask */
631 false), /* pcrel_offset */
633 /* The low 16 bits of the displacement from GP to the target. */
634 HOWTO (R_ALPHA_GPRELLOW,
636 1, /* size (0 = byte, 1 = short, 2 = long) */
638 false, /* pc_relative */
640 complain_overflow_dont, /* complain_on_overflow */
641 0, /* special_function */
642 "GPRELLOW", /* name */
643 false, /* partial_inplace */
644 0xffff, /* src_mask */
645 0xffff, /* dst_mask */
646 false), /* pcrel_offset */
648 /* A 16-bit displacement from the GP to the target. */
649 HOWTO (R_ALPHA_GPREL16,
651 1, /* size (0 = byte, 1 = short, 2 = long) */
653 false, /* pc_relative */
655 complain_overflow_signed, /* complain_on_overflow */
656 0, /* special_function */
657 "GPREL16", /* name */
658 false, /* partial_inplace */
659 0xffff, /* src_mask */
660 0xffff, /* dst_mask */
661 false), /* pcrel_offset */
663 /* Skip 20 - 23; deprecated ECOFF relocs. */
669 /* Misc ELF relocations. */
671 /* A dynamic relocation to copy the target into our .dynbss section. */
672 /* Not generated, as all Alpha objects use PIC, so it is not needed. It
673 is present because every other ELF has one, but should not be used
674 because .dynbss is an ugly thing. */
681 complain_overflow_dont,
682 bfd_elf_generic_reloc,
689 /* A dynamic relocation for a .got entry. */
690 HOWTO (R_ALPHA_GLOB_DAT,
696 complain_overflow_dont,
697 bfd_elf_generic_reloc,
704 /* A dynamic relocation for a .plt entry. */
705 HOWTO (R_ALPHA_JMP_SLOT,
711 complain_overflow_dont,
712 bfd_elf_generic_reloc,
719 /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
720 HOWTO (R_ALPHA_RELATIVE,
726 complain_overflow_dont,
727 bfd_elf_generic_reloc,
735 /* A relocation function which doesn't do anything. */
737 static bfd_reloc_status_type
738 elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
739 bfd *abfd ATTRIBUTE_UNUSED;
741 asymbol *sym ATTRIBUTE_UNUSED;
742 PTR data ATTRIBUTE_UNUSED;
745 char **error_message ATTRIBUTE_UNUSED;
748 reloc->address += sec->output_offset;
752 /* A relocation function used for an unsupported reloc. */
754 static bfd_reloc_status_type
755 elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message)
756 bfd *abfd ATTRIBUTE_UNUSED;
758 asymbol *sym ATTRIBUTE_UNUSED;
759 PTR data ATTRIBUTE_UNUSED;
762 char **error_message ATTRIBUTE_UNUSED;
765 reloc->address += sec->output_offset;
766 return bfd_reloc_notsupported;
769 /* Do the work of the GPDISP relocation. */
771 static bfd_reloc_status_type
772 elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda)
778 bfd_reloc_status_type ret = bfd_reloc_ok;
780 unsigned long i_ldah, i_lda;
782 i_ldah = bfd_get_32 (abfd, p_ldah);
783 i_lda = bfd_get_32 (abfd, p_lda);
785 /* Complain if the instructions are not correct. */
786 if (((i_ldah >> 26) & 0x3f) != 0x09
787 || ((i_lda >> 26) & 0x3f) != 0x08)
788 ret = bfd_reloc_dangerous;
790 /* Extract the user-supplied offset, mirroring the sign extensions
791 that the instructions perform. */
792 addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
793 addend = (addend ^ 0x80008000) - 0x80008000;
797 if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
798 || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
799 ret = bfd_reloc_overflow;
801 /* compensate for the sign extension again. */
802 i_ldah = ((i_ldah & 0xffff0000)
803 | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
804 i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
806 bfd_put_32 (abfd, i_ldah, p_ldah);
807 bfd_put_32 (abfd, i_lda, p_lda);
812 /* The special function for the GPDISP reloc. */
814 static bfd_reloc_status_type
815 elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section,
818 arelent *reloc_entry;
819 asymbol *sym ATTRIBUTE_UNUSED;
821 asection *input_section;
825 bfd_reloc_status_type ret;
826 bfd_vma gp, relocation;
827 bfd_byte *p_ldah, *p_lda;
829 /* Don't do anything if we're not doing a final link. */
832 reloc_entry->address += input_section->output_offset;
836 if (reloc_entry->address > input_section->_cooked_size ||
837 reloc_entry->address + reloc_entry->addend > input_section->_cooked_size)
838 return bfd_reloc_outofrange;
840 /* The gp used in the portion of the output object to which this
841 input object belongs is cached on the input bfd. */
842 gp = _bfd_get_gp_value (abfd);
844 relocation = (input_section->output_section->vma
845 + input_section->output_offset
846 + reloc_entry->address);
848 p_ldah = (bfd_byte *) data + reloc_entry->address;
849 p_lda = p_ldah + reloc_entry->addend;
851 ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
853 /* Complain if the instructions are not correct. */
854 if (ret == bfd_reloc_dangerous)
855 *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
860 /* A mapping from BFD reloc types to Alpha ELF reloc types. */
864 bfd_reloc_code_real_type bfd_reloc_val;
868 static const struct elf_reloc_map elf64_alpha_reloc_map[] =
870 {BFD_RELOC_NONE, R_ALPHA_NONE},
871 {BFD_RELOC_32, R_ALPHA_REFLONG},
872 {BFD_RELOC_64, R_ALPHA_REFQUAD},
873 {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
874 {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
875 {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
876 {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
877 {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
878 {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
879 {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
880 {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
881 {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
882 {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
883 {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
884 {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
885 {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
888 /* Given a BFD reloc type, return a HOWTO structure. */
890 static reloc_howto_type *
891 elf64_alpha_bfd_reloc_type_lookup (abfd, code)
892 bfd *abfd ATTRIBUTE_UNUSED;
893 bfd_reloc_code_real_type code;
895 const struct elf_reloc_map *i, *e;
896 i = e = elf64_alpha_reloc_map;
897 e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
900 if (i->bfd_reloc_val == code)
901 return &elf64_alpha_howto_table[i->elf_reloc_val];
906 /* Given an Alpha ELF reloc type, fill in an arelent structure. */
909 elf64_alpha_info_to_howto (abfd, cache_ptr, dst)
910 bfd *abfd ATTRIBUTE_UNUSED;
912 Elf64_Internal_Rela *dst;
916 r_type = ELF64_R_TYPE(dst->r_info);
917 BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
918 cache_ptr->howto = &elf64_alpha_howto_table[r_type];
921 /* These functions do relaxation for Alpha ELF.
923 Currently I'm only handling what I can do with existing compiler
924 and assembler support, which means no instructions are removed,
925 though some may be nopped. At this time GCC does not emit enough
926 information to do all of the relaxing that is possible. It will
927 take some not small amount of work for that to happen.
929 There are a couple of interesting papers that I once read on this
930 subject, that I cannot find references to at the moment, that
931 related to Alpha in particular. They are by David Wall, then of
936 #define INSN_JSR 0x68004000
937 #define INSN_JSR_MASK 0xfc00c000
941 #define INSN_UNOP 0x2fe00000
943 struct alpha_relax_info
948 Elf_Internal_Rela *relocs, *relend;
949 struct bfd_link_info *link_info;
950 boolean changed_contents;
951 boolean changed_relocs;
955 struct alpha_elf_link_hash_entry *h;
956 struct alpha_elf_got_entry *gotent;
960 static Elf_Internal_Rela * elf64_alpha_relax_with_lituse
961 PARAMS((struct alpha_relax_info *info, bfd_vma symval,
962 Elf_Internal_Rela *irel, Elf_Internal_Rela *irelend));
964 static boolean elf64_alpha_relax_without_lituse
965 PARAMS((struct alpha_relax_info *info, bfd_vma symval,
966 Elf_Internal_Rela *irel));
968 static bfd_vma elf64_alpha_relax_opt_call
969 PARAMS((struct alpha_relax_info *info, bfd_vma symval));
971 static boolean elf64_alpha_relax_section
972 PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
975 static Elf_Internal_Rela *
976 elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type)
977 Elf_Internal_Rela *rel, *relend;
983 if (rel->r_offset == offset
984 && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
991 static Elf_Internal_Rela *
992 elf64_alpha_relax_with_lituse (info, symval, irel, irelend)
993 struct alpha_relax_info *info;
995 Elf_Internal_Rela *irel, *irelend;
997 Elf_Internal_Rela *urel;
1002 boolean lit_reused = false;
1003 boolean all_optimized = true;
1004 unsigned int lit_insn;
1006 lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
1007 if (lit_insn >> 26 != OP_LDQ)
1009 ((*_bfd_error_handler)
1010 ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn",
1011 bfd_get_filename (info->abfd), info->sec->name,
1012 (unsigned long)irel->r_offset));
1016 /* Summarize how this particular LITERAL is used. */
1017 for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
1019 if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
1021 if (urel->r_addend >= 0 && urel->r_addend <= 3)
1022 flags |= 1 << urel->r_addend;
1025 /* A little preparation for the loop... */
1026 disp = symval - info->gp;
1028 for (urel = irel+1, i = 0; i < count; ++i, ++urel)
1032 bfd_signed_vma xdisp;
1034 insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
1036 switch (urel->r_addend)
1038 default: /* 0 = ADDRESS FORMAT */
1039 /* This type is really just a placeholder to note that all
1040 uses cannot be optimized, but to still allow some. */
1041 all_optimized = false;
1044 case 1: /* MEM FORMAT */
1045 /* We can always optimize 16-bit displacements. */
1047 /* Extract the displacement from the instruction, sign-extending
1048 it if necessary, then test whether it is within 16 or 32 bits
1049 displacement from GP. */
1050 insn_disp = insn & 0x0000ffff;
1051 if (insn_disp & 0x00008000)
1052 insn_disp |= 0xffff0000; /* Negative: sign-extend. */
1054 xdisp = disp + insn_disp;
1055 fits16 = (xdisp >= - (bfd_signed_vma) 0x00008000 && xdisp < 0x00008000);
1056 fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 && xdisp < 0x7fff8000);
1060 /* Take the op code and dest from this insn, take the base
1061 register from the literal insn. Leave the offset alone. */
1062 insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
1063 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1065 urel->r_addend = irel->r_addend;
1066 info->changed_relocs = true;
1068 bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset);
1069 info->changed_contents = true;
1072 /* If all mem+byte, we can optimize 32-bit mem displacements. */
1073 else if (fits32 && !(flags & ~6))
1075 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
1077 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1079 lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
1080 bfd_put_32 (info->abfd, lit_insn,
1081 info->contents + irel->r_offset);
1083 info->changed_contents = true;
1085 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1087 urel->r_addend = irel->r_addend;
1088 info->changed_relocs = true;
1091 all_optimized = false;
1094 case 2: /* BYTE OFFSET FORMAT */
1095 /* We can always optimize byte instructions. */
1097 /* FIXME: sanity check the insn for byte op. Check that the
1098 literal dest reg is indeed Rb in the byte insn. */
1100 insn = (insn & ~0x001ff000) | ((symval & 7) << 13) | 0x1000;
1102 urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1104 info->changed_relocs = true;
1106 bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset);
1107 info->changed_contents = true;
1110 case 3: /* CALL FORMAT */
1112 /* If not zero, place to jump without needing pv. */
1113 bfd_vma optdest = elf64_alpha_relax_opt_call (info, symval);
1114 bfd_vma org = (info->sec->output_section->vma
1115 + info->sec->output_offset
1116 + urel->r_offset + 4);
1117 bfd_signed_vma odisp;
1119 odisp = (optdest ? optdest : symval) - org;
1120 if (odisp >= -0x400000 && odisp < 0x400000)
1122 Elf_Internal_Rela *xrel;
1124 /* Preserve branch prediction call stack when possible. */
1125 if ((insn & INSN_JSR_MASK) == INSN_JSR)
1126 insn = (OP_BSR << 26) | (insn & 0x03e00000);
1128 insn = (OP_BR << 26) | (insn & 0x03e00000);
1130 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1132 urel->r_addend = irel->r_addend;
1135 urel->r_addend += optdest - symval;
1137 all_optimized = false;
1139 bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset);
1141 /* Kill any HINT reloc that might exist for this insn. */
1142 xrel = (elf64_alpha_find_reloc_at_ofs
1143 (info->relocs, info->relend, urel->r_offset,
1146 xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1148 info->changed_contents = true;
1149 info->changed_relocs = true;
1152 all_optimized = false;
1154 /* Even if the target is not in range for a direct branch,
1155 if we share a GP, we can eliminate the gp reload. */
1158 Elf_Internal_Rela *gpdisp
1159 = (elf64_alpha_find_reloc_at_ofs
1160 (irel, irelend, urel->r_offset + 4, R_ALPHA_GPDISP));
1163 bfd_byte *p_ldah = info->contents + gpdisp->r_offset;
1164 bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
1165 unsigned int ldah = bfd_get_32 (info->abfd, p_ldah);
1166 unsigned int lda = bfd_get_32 (info->abfd, p_lda);
1168 /* Verify that the instruction is "ldah $29,0($26)".
1169 Consider a function that ends in a noreturn call,
1170 and that the next function begins with an ldgp,
1171 and that by accident there is no padding between.
1172 In that case the insn would use $27 as the base. */
1173 if (ldah == 0x27ba0000 && lda == 0x23bd0000)
1175 bfd_put_32 (info->abfd, INSN_UNOP, p_ldah);
1176 bfd_put_32 (info->abfd, INSN_UNOP, p_lda);
1178 gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1179 info->changed_contents = true;
1180 info->changed_relocs = true;
1189 /* If all cases were optimized, we can reduce the use count on this
1190 got entry by one, possibly eliminating it. */
1193 info->gotent->use_count -= 1;
1194 alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1;
1196 alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1;
1198 /* If the literal instruction is no longer needed (it may have been
1199 reused. We can eliminate it.
1200 ??? For now, I don't want to deal with compacting the section,
1201 so just nop it out. */
1204 irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1205 info->changed_relocs = true;
1207 bfd_put_32 (info->abfd, INSN_UNOP, info->contents + irel->r_offset);
1208 info->changed_contents = true;
1212 return irel + count;
1216 elf64_alpha_relax_opt_call (info, symval)
1217 struct alpha_relax_info *info;
1220 /* If the function has the same gp, and we can identify that the
1221 function does not use its function pointer, we can eliminate the
1224 /* If the symbol is marked NOPV, we are being told the function never
1225 needs its procedure value. */
1226 if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
1229 /* If the symbol is marked STD_GP, we are being told the function does
1230 a normal ldgp in the first two words. */
1231 else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
1234 /* Otherwise, we may be able to identify a GP load in the first two
1235 words, which we can then skip. */
1238 Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
1241 /* Load the relocations from the section that the target symbol is in. */
1242 if (info->sec == info->tsec)
1244 tsec_relocs = info->relocs;
1245 tsec_relend = info->relend;
1250 tsec_relocs = (_bfd_elf64_link_read_relocs
1251 (info->abfd, info->tsec, (PTR) NULL,
1252 (Elf_Internal_Rela *) NULL,
1253 info->link_info->keep_memory));
1254 if (tsec_relocs == NULL)
1256 tsec_relend = tsec_relocs + info->tsec->reloc_count;
1257 tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
1260 /* Recover the symbol's offset within the section. */
1261 ofs = (symval - info->tsec->output_section->vma
1262 - info->tsec->output_offset);
1264 /* Look for a GPDISP reloc. */
1265 gpdisp = (elf64_alpha_find_reloc_at_ofs
1266 (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
1268 if (!gpdisp || gpdisp->r_addend != 4)
1278 /* We've now determined that we can skip an initial gp load. Verify
1279 that the call and the target use the same gp. */
1280 if (info->link_info->hash->creator != info->tsec->owner->xvec
1281 || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
1288 elf64_alpha_relax_without_lituse (info, symval, irel)
1289 struct alpha_relax_info *info;
1291 Elf_Internal_Rela *irel;
1294 bfd_signed_vma disp;
1296 /* Get the instruction. */
1297 insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
1299 if (insn >> 26 != OP_LDQ)
1301 ((*_bfd_error_handler)
1302 ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn",
1303 bfd_get_filename (info->abfd), info->sec->name,
1304 (unsigned long) irel->r_offset));
1308 /* So we aren't told much. Do what we can with the address load and
1309 fake the rest. All of the optimizations here require that the
1310 offset from the GP fit in 16 bits. */
1312 disp = symval - info->gp;
1313 if (disp < -0x8000 || disp >= 0x8000)
1316 /* On the LITERAL instruction itself, consider exchanging
1317 `ldq R,X(gp)' for `lda R,Y(gp)'. */
1319 insn = (OP_LDA << 26) | (insn & 0x03ff0000);
1320 bfd_put_32 (info->abfd, insn, info->contents + irel->r_offset);
1321 info->changed_contents = true;
1323 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), R_ALPHA_GPREL16);
1324 info->changed_relocs = true;
1326 /* Reduce the use count on this got entry by one, possibly
1328 info->gotent->use_count -= 1;
1329 alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1;
1331 alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1;
1333 /* ??? Search forward through this basic block looking for insns
1334 that use the target register. Stop after an insn modifying the
1335 register is seen, or after a branch or call.
1337 Any such memory load insn may be substituted by a load directly
1338 off the GP. This allows the memory load insn to be issued before
1339 the calculated GP register would otherwise be ready.
1341 Any such jsr insn can be replaced by a bsr if it is in range.
1343 This would mean that we'd have to _add_ relocations, the pain of
1344 which gives one pause. */
1350 elf64_alpha_relax_section (abfd, sec, link_info, again)
1353 struct bfd_link_info *link_info;
1356 Elf_Internal_Shdr *symtab_hdr;
1357 Elf_Internal_Rela *internal_relocs;
1358 Elf_Internal_Rela *free_relocs = NULL;
1359 Elf_Internal_Rela *irel, *irelend;
1360 bfd_byte *free_contents = NULL;
1361 Elf64_External_Sym *extsyms = NULL;
1362 Elf64_External_Sym *free_extsyms = NULL;
1363 struct alpha_elf_got_entry **local_got_entries;
1364 struct alpha_relax_info info;
1366 /* We are not currently changing any sizes, so only one pass. */
1369 if (link_info->relocateable
1370 || (sec->flags & SEC_RELOC) == 0
1371 || sec->reloc_count == 0)
1374 /* If this is the first time we have been called for this section,
1375 initialize the cooked size. */
1376 if (sec->_cooked_size == 0)
1377 sec->_cooked_size = sec->_raw_size;
1379 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1380 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
1382 /* Load the relocations for this section. */
1383 internal_relocs = (_bfd_elf64_link_read_relocs
1384 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
1385 link_info->keep_memory));
1386 if (internal_relocs == NULL)
1388 if (! link_info->keep_memory)
1389 free_relocs = internal_relocs;
1391 memset(&info, 0, sizeof (info));
1394 info.link_info = link_info;
1395 info.relocs = internal_relocs;
1396 info.relend = irelend = internal_relocs + sec->reloc_count;
1398 /* Find the GP for this object. */
1399 info.gotobj = alpha_elf_tdata (abfd)->gotobj;
1402 asection *sgot = alpha_elf_tdata (info.gotobj)->got;
1403 info.gp = _bfd_get_gp_value (info.gotobj);
1406 info.gp = (sgot->output_section->vma
1407 + sgot->output_offset
1409 _bfd_set_gp_value (info.gotobj, info.gp);
1413 for (irel = internal_relocs; irel < irelend; irel++)
1416 Elf_Internal_Sym isym;
1417 struct alpha_elf_got_entry *gotent;
1419 if (ELF64_R_TYPE (irel->r_info) != (int) R_ALPHA_LITERAL)
1422 /* Get the section contents. */
1423 if (info.contents == NULL)
1425 if (elf_section_data (sec)->this_hdr.contents != NULL)
1426 info.contents = elf_section_data (sec)->this_hdr.contents;
1429 info.contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
1430 if (info.contents == NULL)
1432 free_contents = info.contents;
1434 if (! bfd_get_section_contents (abfd, sec, info.contents,
1435 (file_ptr) 0, sec->_raw_size))
1440 /* Read this BFD's symbols if we haven't done so already. */
1441 if (extsyms == NULL)
1443 if (symtab_hdr->contents != NULL)
1444 extsyms = (Elf64_External_Sym *) symtab_hdr->contents;
1447 extsyms = ((Elf64_External_Sym *)
1448 bfd_malloc (symtab_hdr->sh_size));
1449 if (extsyms == NULL)
1451 free_extsyms = extsyms;
1452 if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
1453 || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
1454 != symtab_hdr->sh_size))
1459 /* Get the value of the symbol referred to by the reloc. */
1460 if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1462 /* A local symbol. */
1463 bfd_elf64_swap_symbol_in (abfd,
1464 extsyms + ELF64_R_SYM (irel->r_info),
1466 if (isym.st_shndx == SHN_UNDEF)
1467 info.tsec = bfd_und_section_ptr;
1468 else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE)
1469 info.tsec = bfd_section_from_elf_index (abfd, isym.st_shndx);
1470 else if (isym.st_shndx == SHN_ABS)
1471 info.tsec = bfd_abs_section_ptr;
1472 else if (isym.st_shndx == SHN_COMMON)
1473 info.tsec = bfd_com_section_ptr;
1475 continue; /* who knows. */
1478 info.other = isym.st_other;
1479 gotent = local_got_entries[ELF64_R_SYM(irel->r_info)];
1480 symval = isym.st_value;
1485 struct alpha_elf_link_hash_entry *h;
1487 indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1488 h = alpha_elf_sym_hashes (abfd)[indx];
1489 BFD_ASSERT (h != NULL);
1491 while (h->root.root.type == bfd_link_hash_indirect
1492 || h->root.root.type == bfd_link_hash_warning)
1493 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
1495 /* We can't do anthing with undefined or dynamic symbols. */
1496 if (h->root.root.type == bfd_link_hash_undefined
1497 || h->root.root.type == bfd_link_hash_undefweak
1498 || alpha_elf_dynamic_symbol_p (&h->root, link_info))
1502 info.tsec = h->root.root.u.def.section;
1503 info.other = h->root.other;
1504 gotent = h->got_entries;
1505 symval = h->root.root.u.def.value;
1508 /* Search for the got entry to be used by this relocation. */
1509 while (gotent->gotobj != info.gotobj || gotent->addend != irel->r_addend)
1510 gotent = gotent->next;
1511 info.gotent = gotent;
1513 symval += info.tsec->output_section->vma + info.tsec->output_offset;
1514 symval += irel->r_addend;
1516 BFD_ASSERT(info.gotent != NULL);
1518 /* If there exist LITUSE relocations immediately following, this
1519 opens up all sorts of interesting optimizations, because we
1520 now know every location that this address load is used. */
1522 if (irel+1 < irelend && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
1524 irel = elf64_alpha_relax_with_lituse (&info, symval, irel, irelend);
1530 if (!elf64_alpha_relax_without_lituse (&info, symval, irel))
1535 if (!elf64_alpha_size_got_sections (abfd, link_info))
1538 if (info.changed_relocs)
1540 elf_section_data (sec)->relocs = internal_relocs;
1542 else if (free_relocs != NULL)
1547 if (info.changed_contents)
1549 elf_section_data (sec)->this_hdr.contents = info.contents;
1551 else if (free_contents != NULL)
1553 if (! link_info->keep_memory)
1554 free (free_contents);
1557 /* Cache the section contents for elf_link_input_bfd. */
1558 elf_section_data (sec)->this_hdr.contents = info.contents;
1562 if (free_extsyms != NULL)
1564 if (! link_info->keep_memory)
1565 free (free_extsyms);
1568 /* Cache the symbols for elf_link_input_bfd. */
1569 symtab_hdr->contents = extsyms;
1573 *again = info.changed_contents || info.changed_relocs;
1578 if (free_relocs != NULL)
1580 if (free_contents != NULL)
1581 free (free_contents);
1582 if (free_extsyms != NULL)
1583 free (free_extsyms);
1588 #define PLT_HEADER_SIZE 32
1589 #define PLT_HEADER_WORD1 0xc3600000 /* br $27,.+4 */
1590 #define PLT_HEADER_WORD2 0xa77b000c /* ldq $27,12($27) */
1591 #define PLT_HEADER_WORD3 0x47ff041f /* nop */
1592 #define PLT_HEADER_WORD4 0x6b7b0000 /* jmp $27,($27) */
1594 #define PLT_ENTRY_SIZE 12
1595 #define PLT_ENTRY_WORD1 0xc3800000 /* br $28, plt0 */
1596 #define PLT_ENTRY_WORD2 0
1597 #define PLT_ENTRY_WORD3 0
1599 #define MAX_GOT_ENTRIES (64*1024 / 8)
1601 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
1603 /* Handle an Alpha specific section when reading an object file. This
1604 is called when elfcode.h finds a section with an unknown type.
1605 FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
1609 elf64_alpha_section_from_shdr (abfd, hdr, name)
1611 Elf64_Internal_Shdr *hdr;
1616 /* There ought to be a place to keep ELF backend specific flags, but
1617 at the moment there isn't one. We just keep track of the
1618 sections by their name, instead. Fortunately, the ABI gives
1619 suggested names for all the MIPS specific sections, so we will
1620 probably get away with this. */
1621 switch (hdr->sh_type)
1623 case SHT_ALPHA_DEBUG:
1624 if (strcmp (name, ".mdebug") != 0)
1631 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1633 newsect = hdr->bfd_section;
1635 if (hdr->sh_type == SHT_ALPHA_DEBUG)
1637 if (! bfd_set_section_flags (abfd, newsect,
1638 (bfd_get_section_flags (abfd, newsect)
1646 /* Convert Alpha specific section flags to bfd internal section flags. */
1649 elf64_alpha_section_flags (flags, hdr)
1651 Elf64_Internal_Shdr *hdr;
1653 if (hdr->sh_flags & SHF_ALPHA_GPREL)
1654 *flags |= SEC_SMALL_DATA;
1659 /* Set the correct type for an Alpha ELF section. We do this by the
1660 section name, which is a hack, but ought to work. */
1663 elf64_alpha_fake_sections (abfd, hdr, sec)
1665 Elf64_Internal_Shdr *hdr;
1668 register const char *name;
1670 name = bfd_get_section_name (abfd, sec);
1672 if (strcmp (name, ".mdebug") == 0)
1674 hdr->sh_type = SHT_ALPHA_DEBUG;
1675 /* In a shared object on Irix 5.3, the .mdebug section has an
1676 entsize of 0. FIXME: Does this matter? */
1677 if ((abfd->flags & DYNAMIC) != 0 )
1678 hdr->sh_entsize = 0;
1680 hdr->sh_entsize = 1;
1682 else if ((sec->flags & SEC_SMALL_DATA)
1683 || strcmp (name, ".sdata") == 0
1684 || strcmp (name, ".sbss") == 0
1685 || strcmp (name, ".lit4") == 0
1686 || strcmp (name, ".lit8") == 0)
1687 hdr->sh_flags |= SHF_ALPHA_GPREL;
1692 /* Hook called by the linker routine which adds symbols from an object
1693 file. We use it to put .comm items in .sbss, and not .bss. */
1696 elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1698 struct bfd_link_info *info;
1699 const Elf_Internal_Sym *sym;
1700 const char **namep ATTRIBUTE_UNUSED;
1701 flagword *flagsp ATTRIBUTE_UNUSED;
1705 if (sym->st_shndx == SHN_COMMON
1706 && !info->relocateable
1707 && sym->st_size <= elf_gp_size (abfd))
1709 /* Common symbols less than or equal to -G nn bytes are
1710 automatically put into .sbss. */
1712 asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
1716 scomm = bfd_make_section (abfd, ".scommon");
1718 || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC
1720 | SEC_LINKER_CREATED)))
1725 *valp = sym->st_size;
1731 /* Create the .got section. */
1734 elf64_alpha_create_got_section(abfd, info)
1736 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1740 if (bfd_get_section_by_name (abfd, ".got"))
1743 s = bfd_make_section (abfd, ".got");
1745 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
1748 | SEC_LINKER_CREATED))
1749 || !bfd_set_section_alignment (abfd, s, 3))
1752 alpha_elf_tdata (abfd)->got = s;
1757 /* Create all the dynamic sections. */
1760 elf64_alpha_create_dynamic_sections (abfd, info)
1762 struct bfd_link_info *info;
1765 struct elf_link_hash_entry *h;
1767 /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
1769 s = bfd_make_section (abfd, ".plt");
1771 || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
1774 | SEC_LINKER_CREATED
1776 || ! bfd_set_section_alignment (abfd, s, 3))
1779 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
1782 if (! (_bfd_generic_link_add_one_symbol
1783 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
1784 (bfd_vma) 0, (const char *) NULL, false,
1785 get_elf_backend_data (abfd)->collect,
1786 (struct bfd_link_hash_entry **) &h)))
1788 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
1789 h->type = STT_OBJECT;
1792 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
1795 s = bfd_make_section (abfd, ".rela.plt");
1797 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
1800 | SEC_LINKER_CREATED
1802 || ! bfd_set_section_alignment (abfd, s, 3))
1805 /* We may or may not have created a .got section for this object, but
1806 we definitely havn't done the rest of the work. */
1808 if (!elf64_alpha_create_got_section (abfd, info))
1811 s = bfd_make_section(abfd, ".rela.got");
1813 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
1816 | SEC_LINKER_CREATED
1818 || !bfd_set_section_alignment (abfd, s, 3))
1821 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
1822 dynobj's .got section. We don't do this in the linker script
1823 because we don't want to define the symbol if we are not creating
1824 a global offset table. */
1826 if (!(_bfd_generic_link_add_one_symbol
1827 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL,
1828 alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL,
1829 false, get_elf_backend_data (abfd)->collect,
1830 (struct bfd_link_hash_entry **) &h)))
1832 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
1833 h->type = STT_OBJECT;
1836 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
1839 elf_hash_table (info)->hgot = h;
1844 /* Read ECOFF debugging information from a .mdebug section into a
1845 ecoff_debug_info structure. */
1848 elf64_alpha_read_ecoff_info (abfd, section, debug)
1851 struct ecoff_debug_info *debug;
1854 const struct ecoff_debug_swap *swap;
1855 char *ext_hdr = NULL;
1857 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1858 memset (debug, 0, sizeof (*debug));
1860 ext_hdr = (char *) bfd_malloc ((size_t) swap->external_hdr_size);
1861 if (ext_hdr == NULL && swap->external_hdr_size != 0)
1864 if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
1865 swap->external_hdr_size)
1869 symhdr = &debug->symbolic_header;
1870 (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
1872 /* The symbolic header contains absolute file offsets and sizes to
1874 #define READ(ptr, offset, count, size, type) \
1875 if (symhdr->count == 0) \
1876 debug->ptr = NULL; \
1879 debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \
1880 if (debug->ptr == NULL) \
1881 goto error_return; \
1882 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
1883 || (bfd_read (debug->ptr, size, symhdr->count, \
1884 abfd) != size * symhdr->count)) \
1885 goto error_return; \
1888 READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
1889 READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
1890 READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
1891 READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
1892 READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
1893 READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
1895 READ (ss, cbSsOffset, issMax, sizeof (char), char *);
1896 READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
1897 READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
1898 READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
1899 READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
1903 debug->adjust = NULL;
1908 if (ext_hdr != NULL)
1910 if (debug->line != NULL)
1912 if (debug->external_dnr != NULL)
1913 free (debug->external_dnr);
1914 if (debug->external_pdr != NULL)
1915 free (debug->external_pdr);
1916 if (debug->external_sym != NULL)
1917 free (debug->external_sym);
1918 if (debug->external_opt != NULL)
1919 free (debug->external_opt);
1920 if (debug->external_aux != NULL)
1921 free (debug->external_aux);
1922 if (debug->ss != NULL)
1924 if (debug->ssext != NULL)
1925 free (debug->ssext);
1926 if (debug->external_fdr != NULL)
1927 free (debug->external_fdr);
1928 if (debug->external_rfd != NULL)
1929 free (debug->external_rfd);
1930 if (debug->external_ext != NULL)
1931 free (debug->external_ext);
1935 /* Alpha ELF local labels start with '$'. */
1938 elf64_alpha_is_local_label_name (abfd, name)
1939 bfd *abfd ATTRIBUTE_UNUSED;
1942 return name[0] == '$';
1945 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
1946 routine in order to handle the ECOFF debugging information. We
1947 still call this mips_elf_find_line because of the slot
1948 find_line_info in elf_obj_tdata is declared that way. */
1950 struct mips_elf_find_line
1952 struct ecoff_debug_info d;
1953 struct ecoff_find_line i;
1957 elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
1958 functionname_ptr, line_ptr)
1963 const char **filename_ptr;
1964 const char **functionname_ptr;
1965 unsigned int *line_ptr;
1969 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
1970 filename_ptr, functionname_ptr,
1972 &elf_tdata (abfd)->dwarf2_find_line_info))
1975 msec = bfd_get_section_by_name (abfd, ".mdebug");
1979 struct mips_elf_find_line *fi;
1980 const struct ecoff_debug_swap * const swap =
1981 get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1983 /* If we are called during a link, alpha_elf_final_link may have
1984 cleared the SEC_HAS_CONTENTS field. We force it back on here
1985 if appropriate (which it normally will be). */
1986 origflags = msec->flags;
1987 if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
1988 msec->flags |= SEC_HAS_CONTENTS;
1990 fi = elf_tdata (abfd)->find_line_info;
1993 bfd_size_type external_fdr_size;
1996 struct fdr *fdr_ptr;
1998 fi = ((struct mips_elf_find_line *)
1999 bfd_zalloc (abfd, sizeof (struct mips_elf_find_line)));
2002 msec->flags = origflags;
2006 if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
2008 msec->flags = origflags;
2012 /* Swap in the FDR information. */
2013 fi->d.fdr = ((struct fdr *)
2015 (fi->d.symbolic_header.ifdMax *
2016 sizeof (struct fdr))));
2017 if (fi->d.fdr == NULL)
2019 msec->flags = origflags;
2022 external_fdr_size = swap->external_fdr_size;
2023 fdr_ptr = fi->d.fdr;
2024 fraw_src = (char *) fi->d.external_fdr;
2025 fraw_end = (fraw_src
2026 + fi->d.symbolic_header.ifdMax * external_fdr_size);
2027 for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
2028 (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
2030 elf_tdata (abfd)->find_line_info = fi;
2032 /* Note that we don't bother to ever free this information.
2033 find_nearest_line is either called all the time, as in
2034 objdump -l, so the information should be saved, or it is
2035 rarely called, as in ld error messages, so the memory
2036 wasted is unimportant. Still, it would probably be a
2037 good idea for free_cached_info to throw it away. */
2040 if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
2041 &fi->i, filename_ptr, functionname_ptr,
2044 msec->flags = origflags;
2048 msec->flags = origflags;
2051 /* Fall back on the generic ELF find_nearest_line routine. */
2053 return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
2054 filename_ptr, functionname_ptr,
2058 /* Structure used to pass information to alpha_elf_output_extsym. */
2063 struct bfd_link_info *info;
2064 struct ecoff_debug_info *debug;
2065 const struct ecoff_debug_swap *swap;
2070 elf64_alpha_output_extsym (h, data)
2071 struct alpha_elf_link_hash_entry *h;
2074 struct extsym_info *einfo = (struct extsym_info *) data;
2076 asection *sec, *output_section;
2078 if (h->root.indx == -2)
2080 else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2081 || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
2082 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
2083 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
2085 else if (einfo->info->strip == strip_all
2086 || (einfo->info->strip == strip_some
2087 && bfd_hash_lookup (einfo->info->keep_hash,
2088 h->root.root.root.string,
2089 false, false) == NULL))
2097 if (h->esym.ifd == -2)
2100 h->esym.cobol_main = 0;
2101 h->esym.weakext = 0;
2102 h->esym.reserved = 0;
2103 h->esym.ifd = ifdNil;
2104 h->esym.asym.value = 0;
2105 h->esym.asym.st = stGlobal;
2107 if (h->root.root.type != bfd_link_hash_defined
2108 && h->root.root.type != bfd_link_hash_defweak)
2109 h->esym.asym.sc = scAbs;
2114 sec = h->root.root.u.def.section;
2115 output_section = sec->output_section;
2117 /* When making a shared library and symbol h is the one from
2118 the another shared library, OUTPUT_SECTION may be null. */
2119 if (output_section == NULL)
2120 h->esym.asym.sc = scUndefined;
2123 name = bfd_section_name (output_section->owner, output_section);
2125 if (strcmp (name, ".text") == 0)
2126 h->esym.asym.sc = scText;
2127 else if (strcmp (name, ".data") == 0)
2128 h->esym.asym.sc = scData;
2129 else if (strcmp (name, ".sdata") == 0)
2130 h->esym.asym.sc = scSData;
2131 else if (strcmp (name, ".rodata") == 0
2132 || strcmp (name, ".rdata") == 0)
2133 h->esym.asym.sc = scRData;
2134 else if (strcmp (name, ".bss") == 0)
2135 h->esym.asym.sc = scBss;
2136 else if (strcmp (name, ".sbss") == 0)
2137 h->esym.asym.sc = scSBss;
2138 else if (strcmp (name, ".init") == 0)
2139 h->esym.asym.sc = scInit;
2140 else if (strcmp (name, ".fini") == 0)
2141 h->esym.asym.sc = scFini;
2143 h->esym.asym.sc = scAbs;
2147 h->esym.asym.reserved = 0;
2148 h->esym.asym.index = indexNil;
2151 if (h->root.root.type == bfd_link_hash_common)
2152 h->esym.asym.value = h->root.root.u.c.size;
2153 else if (h->root.root.type == bfd_link_hash_defined
2154 || h->root.root.type == bfd_link_hash_defweak)
2156 if (h->esym.asym.sc == scCommon)
2157 h->esym.asym.sc = scBss;
2158 else if (h->esym.asym.sc == scSCommon)
2159 h->esym.asym.sc = scSBss;
2161 sec = h->root.root.u.def.section;
2162 output_section = sec->output_section;
2163 if (output_section != NULL)
2164 h->esym.asym.value = (h->root.root.u.def.value
2165 + sec->output_offset
2166 + output_section->vma);
2168 h->esym.asym.value = 0;
2170 else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2172 /* Set type and value for a symbol with a function stub. */
2173 h->esym.asym.st = stProc;
2174 sec = bfd_get_section_by_name (einfo->abfd, ".plt");
2176 h->esym.asym.value = 0;
2179 output_section = sec->output_section;
2180 if (output_section != NULL)
2181 h->esym.asym.value = (h->root.plt.offset
2182 + sec->output_offset
2183 + output_section->vma);
2185 h->esym.asym.value = 0;
2189 if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
2190 h->root.root.root.string,
2193 einfo->failed = true;
2200 /* FIXME: Create a runtime procedure table from the .mdebug section.
2203 mips_elf_create_procedure_table (handle, abfd, info, s, debug)
2206 struct bfd_link_info *info;
2208 struct ecoff_debug_info *debug;
2211 /* Handle dynamic relocations when doing an Alpha ELF link. */
2214 elf64_alpha_check_relocs (abfd, info, sec, relocs)
2216 struct bfd_link_info *info;
2218 const Elf_Internal_Rela *relocs;
2222 const char *rel_sec_name;
2223 Elf_Internal_Shdr *symtab_hdr;
2224 struct alpha_elf_link_hash_entry **sym_hashes;
2225 struct alpha_elf_got_entry **local_got_entries;
2226 const Elf_Internal_Rela *rel, *relend;
2229 if (info->relocateable)
2232 dynobj = elf_hash_table(info)->dynobj;
2234 elf_hash_table(info)->dynobj = dynobj = abfd;
2237 rel_sec_name = NULL;
2238 symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
2239 sym_hashes = alpha_elf_sym_hashes(abfd);
2240 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
2243 relend = relocs + sec->reloc_count;
2244 for (rel = relocs; rel < relend; ++rel)
2246 unsigned long r_symndx, r_type;
2247 struct alpha_elf_link_hash_entry *h;
2249 r_symndx = ELF64_R_SYM (rel->r_info);
2250 if (r_symndx < symtab_hdr->sh_info)
2254 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2256 while (h->root.root.type == bfd_link_hash_indirect
2257 || h->root.root.type == bfd_link_hash_warning)
2258 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2260 h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
2262 r_type = ELF64_R_TYPE (rel->r_info);
2266 case R_ALPHA_LITERAL:
2268 struct alpha_elf_got_entry *gotent;
2273 /* Search for and possibly create a got entry. */
2274 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
2275 if (gotent->gotobj == abfd &&
2276 gotent->addend == rel->r_addend)
2281 gotent = ((struct alpha_elf_got_entry *)
2283 sizeof (struct alpha_elf_got_entry)));
2287 gotent->gotobj = abfd;
2288 gotent->addend = rel->r_addend;
2289 gotent->got_offset = -1;
2291 gotent->use_count = 1;
2293 gotent->next = h->got_entries;
2294 h->got_entries = gotent;
2296 alpha_elf_tdata (abfd)->total_got_entries++;
2299 gotent->use_count += 1;
2303 /* This is a local .got entry -- record for merge. */
2304 if (!local_got_entries)
2307 size = (symtab_hdr->sh_info
2308 * sizeof (struct alpha_elf_got_entry *));
2310 local_got_entries = ((struct alpha_elf_got_entry **)
2311 bfd_alloc (abfd, size));
2312 if (!local_got_entries)
2315 memset (local_got_entries, 0, size);
2316 alpha_elf_tdata (abfd)->local_got_entries =
2320 for (gotent = local_got_entries[ELF64_R_SYM(rel->r_info)];
2321 gotent != NULL && gotent->addend != rel->r_addend;
2322 gotent = gotent->next)
2326 gotent = ((struct alpha_elf_got_entry *)
2328 sizeof (struct alpha_elf_got_entry)));
2332 gotent->gotobj = abfd;
2333 gotent->addend = rel->r_addend;
2334 gotent->got_offset = -1;
2336 gotent->use_count = 1;
2338 gotent->next = local_got_entries[ELF64_R_SYM(rel->r_info)];
2339 local_got_entries[ELF64_R_SYM(rel->r_info)] = gotent;
2341 alpha_elf_tdata(abfd)->total_got_entries++;
2342 alpha_elf_tdata(abfd)->n_local_got_entries++;
2345 gotent->use_count += 1;
2348 /* Remember how this literal is used from its LITUSEs.
2349 This will be important when it comes to decide if we can
2350 create a .plt entry for a function symbol. */
2352 && ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE)
2357 if (rel->r_addend >= 1 && rel->r_addend <= 3)
2358 flags |= 1 << rel->r_addend;
2360 while (rel+1 < relend &&
2361 ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE);
2365 /* No LITUSEs -- presumably the address is not being
2366 loaded for nothing. */
2367 flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
2370 gotent->flags |= flags;
2373 /* Make a guess as to whether a .plt entry will be needed. */
2374 if ((h->flags |= flags) == ALPHA_ELF_LINK_HASH_LU_FUNC)
2375 h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2377 h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2382 case R_ALPHA_GPDISP:
2383 case R_ALPHA_GPREL16:
2384 case R_ALPHA_GPREL32:
2385 case R_ALPHA_GPRELHIGH:
2386 case R_ALPHA_GPRELLOW:
2387 /* We don't actually use the .got here, but the sections must
2388 be created before the linker maps input sections to output
2392 if (!elf64_alpha_create_got_section (abfd, info))
2395 /* Make sure the object's gotobj is set to itself so
2396 that we default to every object with its own .got.
2397 We'll merge .gots later once we've collected each
2399 alpha_elf_tdata(abfd)->gotobj = abfd;
2405 case R_ALPHA_SREL16:
2406 case R_ALPHA_SREL32:
2407 case R_ALPHA_SREL64:
2412 case R_ALPHA_REFLONG:
2413 case R_ALPHA_REFQUAD:
2414 if (rel_sec_name == NULL)
2416 rel_sec_name = (bfd_elf_string_from_elf_section
2417 (abfd, elf_elfheader(abfd)->e_shstrndx,
2418 elf_section_data(sec)->rel_hdr.sh_name));
2419 if (rel_sec_name == NULL)
2422 BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0
2423 && strcmp (bfd_get_section_name (abfd, sec),
2424 rel_sec_name+5) == 0);
2427 /* We need to create the section here now whether we eventually
2428 use it or not so that it gets mapped to an output section by
2429 the linker. If not used, we'll kill it in
2430 size_dynamic_sections. */
2433 sreloc = bfd_get_section_by_name (dynobj, rel_sec_name);
2436 sreloc = bfd_make_section (dynobj, rel_sec_name);
2438 || !bfd_set_section_flags (dynobj, sreloc,
2445 | SEC_LINKER_CREATED
2447 || !bfd_set_section_alignment (dynobj, sreloc, 3))
2454 /* Since we havn't seen all of the input symbols yet, we
2455 don't know whether we'll actually need a dynamic relocation
2456 entry for this reloc. So make a record of it. Once we
2457 find out if this thing needs dynamic relocation we'll
2458 expand the relocation sections by the appropriate amount. */
2460 struct alpha_elf_reloc_entry *rent;
2462 for (rent = h->reloc_entries; rent; rent = rent->next)
2463 if (rent->rtype == r_type && rent->srel == sreloc)
2468 rent = ((struct alpha_elf_reloc_entry *)
2470 sizeof (struct alpha_elf_reloc_entry)));
2474 rent->srel = sreloc;
2475 rent->rtype = r_type;
2477 rent->reltext = (sec->flags & SEC_READONLY) != 0;
2479 rent->next = h->reloc_entries;
2480 h->reloc_entries = rent;
2485 else if (info->shared && (sec->flags & SEC_ALLOC))
2487 /* If this is a shared library, and the section is to be
2488 loaded into memory, we need a RELATIVE reloc. */
2489 sreloc->_raw_size += sizeof (Elf64_External_Rela);
2490 if (sec->flags & SEC_READONLY)
2491 info->flags |= DF_TEXTREL;
2500 /* Adjust a symbol defined by a dynamic object and referenced by a
2501 regular object. The current definition is in some section of the
2502 dynamic object, but we're not including those sections. We have to
2503 change the definition to something the rest of the link can
2507 elf64_alpha_adjust_dynamic_symbol (info, h)
2508 struct bfd_link_info *info;
2509 struct elf_link_hash_entry *h;
2513 struct alpha_elf_link_hash_entry *ah;
2515 dynobj = elf_hash_table(info)->dynobj;
2516 ah = (struct alpha_elf_link_hash_entry *)h;
2518 /* Now that we've seen all of the input symbols, finalize our decision
2519 about whether this symbol should get a .plt entry. */
2521 if (h->root.type != bfd_link_hash_undefweak
2522 && alpha_elf_dynamic_symbol_p (h, info)
2523 && ((h->type == STT_FUNC
2524 && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR))
2525 || (h->type == STT_NOTYPE
2526 && ah->flags == ALPHA_ELF_LINK_HASH_LU_FUNC))
2527 /* Don't prevent otherwise valid programs from linking by attempting
2528 to create a new .got entry somewhere. A Correct Solution would be
2529 to add a new .got section to a new object file and let it be merged
2530 somewhere later. But for now don't bother. */
2533 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2535 s = bfd_get_section_by_name(dynobj, ".plt");
2536 if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
2539 /* The first bit of the .plt is reserved. */
2540 if (s->_raw_size == 0)
2541 s->_raw_size = PLT_HEADER_SIZE;
2543 h->plt.offset = s->_raw_size;
2544 s->_raw_size += PLT_ENTRY_SIZE;
2546 /* If this symbol is not defined in a regular file, and we are not
2547 generating a shared library, then set the symbol to the location
2548 in the .plt. This is required to make function pointers compare
2549 equal between the normal executable and the shared library. */
2551 && h->root.type != bfd_link_hash_defweak)
2553 h->root.u.def.section = s;
2554 h->root.u.def.value = h->plt.offset;
2557 /* We also need a JMP_SLOT entry in the .rela.plt section. */
2558 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2559 BFD_ASSERT (s != NULL);
2560 s->_raw_size += sizeof (Elf64_External_Rela);
2565 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2567 /* If this is a weak symbol, and there is a real definition, the
2568 processor independent code will have arranged for us to see the
2569 real definition first, and we can just use the same value. */
2570 if (h->weakdef != NULL)
2572 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2573 || h->weakdef->root.type == bfd_link_hash_defweak);
2574 h->root.u.def.section = h->weakdef->root.u.def.section;
2575 h->root.u.def.value = h->weakdef->root.u.def.value;
2579 /* This is a reference to a symbol defined by a dynamic object which
2580 is not a function. The Alpha, since it uses .got entries for all
2581 symbols even in regular objects, does not need the hackery of a
2582 .dynbss section and COPY dynamic relocations. */
2587 /* Symbol versioning can create new symbols, and make our old symbols
2588 indirect to the new ones. Consolidate the got and reloc information
2589 in these situations. */
2592 elf64_alpha_merge_ind_symbols (hi, dummy)
2593 struct alpha_elf_link_hash_entry *hi;
2594 PTR dummy ATTRIBUTE_UNUSED;
2596 struct alpha_elf_link_hash_entry *hs;
2598 if (hi->root.root.type != bfd_link_hash_indirect)
2602 hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link;
2603 } while (hs->root.root.type == bfd_link_hash_indirect);
2605 /* Merge the flags. Whee. */
2607 hs->flags |= hi->flags;
2609 /* Merge the .got entries. Cannibalize the old symbol's list in
2610 doing so, since we don't need it anymore. */
2612 if (hs->got_entries == NULL)
2613 hs->got_entries = hi->got_entries;
2616 struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
2618 gsh = hs->got_entries;
2619 for (gi = hi->got_entries; gi ; gi = gin)
2622 for (gs = gsh; gs ; gs = gs->next)
2623 if (gi->gotobj == gs->gotobj && gi->addend == gs->addend)
2625 gi->next = hs->got_entries;
2626 hs->got_entries = gi;
2630 hi->got_entries = NULL;
2632 /* And similar for the reloc entries. */
2634 if (hs->reloc_entries == NULL)
2635 hs->reloc_entries = hi->reloc_entries;
2638 struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
2640 rsh = hs->reloc_entries;
2641 for (ri = hi->reloc_entries; ri ; ri = rin)
2644 for (rs = rsh; rs ; rs = rs->next)
2645 if (ri->rtype == rs->rtype)
2647 rs->count += ri->count;
2650 ri->next = hs->reloc_entries;
2651 hs->reloc_entries = ri;
2655 hi->reloc_entries = NULL;
2660 /* Is it possible to merge two object file's .got tables? */
2663 elf64_alpha_can_merge_gots (a, b)
2666 int total = alpha_elf_tdata (a)->total_got_entries;
2669 /* Trivial quick fallout test. */
2670 if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES)
2673 /* By their nature, local .got entries cannot be merged. */
2674 if ((total += alpha_elf_tdata (b)->n_local_got_entries) > MAX_GOT_ENTRIES)
2677 /* Failing the common trivial comparison, we must effectively
2678 perform the merge. Not actually performing the merge means that
2679 we don't have to store undo information in case we fail. */
2680 for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
2682 struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
2683 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
2686 n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
2687 for (i = 0; i < n; ++i)
2689 struct alpha_elf_got_entry *ae, *be;
2690 struct alpha_elf_link_hash_entry *h;
2693 while (h->root.root.type == bfd_link_hash_indirect
2694 || h->root.root.type == bfd_link_hash_warning)
2695 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2697 for (be = h->got_entries; be ; be = be->next)
2699 if (be->use_count == 0)
2701 if (be->gotobj != b)
2704 for (ae = h->got_entries; ae ; ae = ae->next)
2705 if (ae->gotobj == a && ae->addend == be->addend)
2708 if (++total > MAX_GOT_ENTRIES)
2718 /* Actually merge two .got tables. */
2721 elf64_alpha_merge_gots (a, b)
2724 int total = alpha_elf_tdata (a)->total_got_entries;
2727 /* Remember local expansion. */
2729 int e = alpha_elf_tdata (b)->n_local_got_entries;
2731 alpha_elf_tdata (a)->n_local_got_entries += e;
2734 for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
2736 struct alpha_elf_got_entry **local_got_entries;
2737 struct alpha_elf_link_hash_entry **hashes;
2738 Elf_Internal_Shdr *symtab_hdr;
2741 /* Let the local .got entries know they are part of a new subsegment. */
2742 local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
2743 if (local_got_entries)
2745 n = elf_tdata (bsub)->symtab_hdr.sh_info;
2746 for (i = 0; i < n; ++i)
2748 struct alpha_elf_got_entry *ent;
2749 for (ent = local_got_entries[i]; ent; ent = ent->next)
2754 /* Merge the global .got entries. */
2755 hashes = alpha_elf_sym_hashes (bsub);
2756 symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
2758 n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
2759 for (i = 0; i < n; ++i)
2761 struct alpha_elf_got_entry *ae, *be, **pbe, **start;
2762 struct alpha_elf_link_hash_entry *h;
2765 while (h->root.root.type == bfd_link_hash_indirect
2766 || h->root.root.type == bfd_link_hash_warning)
2767 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2769 start = &h->got_entries;
2770 for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
2772 if (be->use_count == 0)
2777 if (be->gotobj != b)
2780 for (ae = *start; ae ; ae = ae->next)
2781 if (ae->gotobj == a && ae->addend == be->addend)
2783 ae->flags |= be->flags;
2784 ae->use_count += be->use_count;
2795 alpha_elf_tdata (bsub)->gotobj = a;
2797 alpha_elf_tdata (a)->total_got_entries = total;
2799 /* Merge the two in_got chains. */
2804 while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
2807 alpha_elf_tdata (bsub)->in_got_link_next = b;
2811 /* Calculate the offsets for the got entries. */
2814 elf64_alpha_calc_got_offsets_for_symbol (h, arg)
2815 struct alpha_elf_link_hash_entry *h;
2816 PTR arg ATTRIBUTE_UNUSED;
2818 struct alpha_elf_got_entry *gotent;
2820 for (gotent = h->got_entries; gotent; gotent = gotent->next)
2821 if (gotent->use_count > 0)
2824 = &alpha_elf_tdata (gotent->gotobj)->got->_raw_size;
2826 gotent->got_offset = *plge;
2834 elf64_alpha_calc_got_offsets (info)
2835 struct bfd_link_info *info;
2837 bfd *i, *got_list = alpha_elf_hash_table(info)->got_list;
2839 /* First, zero out the .got sizes, as we may be recalculating the
2840 .got after optimizing it. */
2841 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
2842 alpha_elf_tdata(i)->got->_raw_size = 0;
2844 /* Next, fill in the offsets for all the global entries. */
2845 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
2846 elf64_alpha_calc_got_offsets_for_symbol,
2849 /* Finally, fill in the offsets for the local entries. */
2850 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
2852 bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size;
2855 for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
2857 struct alpha_elf_got_entry **local_got_entries, *gotent;
2860 local_got_entries = alpha_elf_tdata(j)->local_got_entries;
2861 if (!local_got_entries)
2864 for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
2865 for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
2866 if (gotent->use_count > 0)
2868 gotent->got_offset = got_offset;
2873 alpha_elf_tdata(i)->got->_raw_size = got_offset;
2874 alpha_elf_tdata(i)->got->_cooked_size = got_offset;
2878 /* Constructs the gots. */
2881 elf64_alpha_size_got_sections (output_bfd, info)
2882 bfd *output_bfd ATTRIBUTE_UNUSED;
2883 struct bfd_link_info *info;
2885 bfd *i, *got_list, *cur_got_obj = NULL;
2886 int something_changed = 0;
2888 got_list = alpha_elf_hash_table (info)->got_list;
2890 /* On the first time through, pretend we have an existing got list
2891 consisting of all of the input files. */
2892 if (got_list == NULL)
2894 for (i = info->input_bfds; i ; i = i->link_next)
2896 bfd *this_got = alpha_elf_tdata (i)->gotobj;
2897 if (this_got == NULL)
2900 /* We are assuming no merging has yet ocurred. */
2901 BFD_ASSERT (this_got == i);
2903 if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES)
2905 /* Yikes! A single object file has too many entries. */
2906 (*_bfd_error_handler)
2907 (_("%s: .got subsegment exceeds 64K (size %d)"),
2908 bfd_get_filename (i),
2909 alpha_elf_tdata (this_got)->total_got_entries * 8);
2913 if (got_list == NULL)
2914 got_list = this_got;
2916 alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
2917 cur_got_obj = this_got;
2920 /* Strange degenerate case of no got references. */
2921 if (got_list == NULL)
2924 alpha_elf_hash_table (info)->got_list = got_list;
2926 /* Force got offsets to be recalculated. */
2927 something_changed = 1;
2930 cur_got_obj = got_list;
2931 i = alpha_elf_tdata(cur_got_obj)->got_link_next;
2934 if (elf64_alpha_can_merge_gots (cur_got_obj, i))
2936 elf64_alpha_merge_gots (cur_got_obj, i);
2937 i = alpha_elf_tdata(i)->got_link_next;
2938 alpha_elf_tdata(cur_got_obj)->got_link_next = i;
2939 something_changed = 1;
2944 i = alpha_elf_tdata(i)->got_link_next;
2948 /* Once the gots have been merged, fill in the got offsets for
2949 everything therein. */
2950 if (1 || something_changed)
2951 elf64_alpha_calc_got_offsets (info);
2957 elf64_alpha_always_size_sections (output_bfd, info)
2959 struct bfd_link_info *info;
2963 if (info->relocateable)
2966 /* First, take care of the indirect symbols created by versioning. */
2967 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
2968 elf64_alpha_merge_ind_symbols,
2971 if (!elf64_alpha_size_got_sections (output_bfd, info))
2974 /* Allocate space for all of the .got subsections. */
2975 i = alpha_elf_hash_table (info)->got_list;
2976 for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
2978 asection *s = alpha_elf_tdata(i)->got;
2979 if (s->_raw_size > 0)
2981 s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size);
2982 if (s->contents == NULL)
2990 /* Work out the sizes of the dynamic relocation entries. */
2993 elf64_alpha_calc_dynrel_sizes (h, info)
2994 struct alpha_elf_link_hash_entry *h;
2995 struct bfd_link_info *info;
2997 /* If the symbol was defined as a common symbol in a regular object
2998 file, and there was no definition in any dynamic object, then the
2999 linker will have allocated space for the symbol in a common
3000 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
3001 set. This is done for dynamic symbols in
3002 elf_adjust_dynamic_symbol but this is not done for non-dynamic
3003 symbols, somehow. */
3004 if (((h->root.elf_link_hash_flags
3005 & (ELF_LINK_HASH_DEF_REGULAR
3006 | ELF_LINK_HASH_REF_REGULAR
3007 | ELF_LINK_HASH_DEF_DYNAMIC))
3008 == ELF_LINK_HASH_REF_REGULAR)
3009 && (h->root.root.type == bfd_link_hash_defined
3010 || h->root.root.type == bfd_link_hash_defweak)
3011 && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
3013 h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3016 /* If the symbol is dynamic, we'll need all the relocations in their
3017 natural form. If this is a shared object, and it has been forced
3018 local, we'll need the same number of RELATIVE relocations. */
3020 if (alpha_elf_dynamic_symbol_p (&h->root, info) || info->shared)
3022 struct alpha_elf_reloc_entry *relent;
3024 struct alpha_elf_got_entry *gotent;
3025 bfd_size_type count;
3028 for (relent = h->reloc_entries; relent; relent = relent->next)
3029 if (relent->rtype == R_ALPHA_REFLONG
3030 || relent->rtype == R_ALPHA_REFQUAD)
3032 relent->srel->_raw_size +=
3033 sizeof (Elf64_External_Rela) * relent->count;
3034 if (relent->reltext)
3035 info->flags |= DT_TEXTREL;
3038 dynobj = elf_hash_table(info)->dynobj;
3041 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
3044 /* If we are using a .plt entry, subtract one, as the first
3045 reference uses a .rela.plt entry instead. */
3046 if (h->root.plt.offset != MINUS_ONE)
3051 srel = bfd_get_section_by_name (dynobj, ".rela.got");
3052 BFD_ASSERT (srel != NULL);
3053 srel->_raw_size += sizeof (Elf64_External_Rela) * count;
3060 /* Set the sizes of the dynamic sections. */
3063 elf64_alpha_size_dynamic_sections (output_bfd, info)
3064 bfd *output_bfd ATTRIBUTE_UNUSED;
3065 struct bfd_link_info *info;
3071 dynobj = elf_hash_table(info)->dynobj;
3072 BFD_ASSERT(dynobj != NULL);
3074 if (elf_hash_table (info)->dynamic_sections_created)
3076 /* Set the contents of the .interp section to the interpreter. */
3079 s = bfd_get_section_by_name (dynobj, ".interp");
3080 BFD_ASSERT (s != NULL);
3081 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3082 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3085 /* Now that we've seen all of the input files, we can decide which
3086 symbols need dynamic relocation entries and which don't. We've
3087 collected information in check_relocs that we can now apply to
3088 size the dynamic relocation sections. */
3089 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3090 elf64_alpha_calc_dynrel_sizes,
3093 /* When building shared libraries, each local .got entry needs a
3099 bfd_size_type count;
3101 srel = bfd_get_section_by_name (dynobj, ".rela.got");
3102 BFD_ASSERT (srel != NULL);
3104 for (i = alpha_elf_hash_table(info)->got_list, count = 0;
3106 i = alpha_elf_tdata(i)->got_link_next)
3107 count += alpha_elf_tdata(i)->n_local_got_entries;
3109 srel->_raw_size += count * sizeof (Elf64_External_Rela);
3112 /* else we're not dynamic and by definition we don't need such things. */
3114 /* The check_relocs and adjust_dynamic_symbol entry points have
3115 determined the sizes of the various dynamic sections. Allocate
3118 for (s = dynobj->sections; s != NULL; s = s->next)
3123 if (!(s->flags & SEC_LINKER_CREATED))
3126 /* It's OK to base decisions on the section name, because none
3127 of the dynobj section names depend upon the input files. */
3128 name = bfd_get_section_name (dynobj, s);
3130 /* If we don't need this section, strip it from the output file.
3131 This is to handle .rela.bss and .rela.plt. We must create it
3132 in create_dynamic_sections, because it must be created before
3133 the linker maps input sections to output sections. The
3134 linker does that before adjust_dynamic_symbol is called, and
3135 it is that function which decides whether anything needs to
3136 go into these sections. */
3140 if (strncmp (name, ".rela", 5) == 0)
3142 strip = (s->_raw_size == 0);
3146 if (strcmp(name, ".rela.plt") == 0)
3149 /* We use the reloc_count field as a counter if we need
3150 to copy relocs into the output file. */
3154 else if (strcmp (name, ".plt") != 0)
3156 /* It's not one of our dynamic sections, so don't allocate space. */
3161 _bfd_strip_section_from_output (info, s);
3164 /* Allocate memory for the section contents. */
3165 s->contents = (bfd_byte *) bfd_zalloc(dynobj, s->_raw_size);
3166 if (s->contents == NULL && s->_raw_size != 0)
3171 if (elf_hash_table (info)->dynamic_sections_created)
3173 /* Add some entries to the .dynamic section. We fill in the
3174 values later, in elf64_alpha_finish_dynamic_sections, but we
3175 must add the entries now so that we get the correct size for
3176 the .dynamic section. The DT_DEBUG entry is filled in by the
3177 dynamic linker and used by the debugger. */
3180 if (!bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0))
3184 if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0))
3189 if (! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0)
3190 || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
3191 || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0))
3195 if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0)
3196 || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0)
3197 || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT,
3198 sizeof (Elf64_External_Rela)))
3201 if (info->flags & DF_TEXTREL)
3203 if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0))
3211 /* Relocate an Alpha ELF section. */
3214 elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
3215 contents, relocs, local_syms, local_sections)
3217 struct bfd_link_info *info;
3219 asection *input_section;
3221 Elf_Internal_Rela *relocs;
3222 Elf_Internal_Sym *local_syms;
3223 asection **local_sections;
3225 Elf_Internal_Shdr *symtab_hdr;
3226 Elf_Internal_Rela *rel;
3227 Elf_Internal_Rela *relend;
3228 asection *sec, *sgot, *srel, *srelgot;
3229 bfd *dynobj, *gotobj;
3231 boolean ret_val = true;
3233 srelgot = srel = NULL;
3234 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3235 dynobj = elf_hash_table (info)->dynobj;
3238 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3241 /* Find the gp value for this input bfd. */
3244 gotobj = alpha_elf_tdata (input_bfd)->gotobj;
3247 sgot = alpha_elf_tdata (gotobj)->got;
3248 gp = _bfd_get_gp_value (gotobj);
3251 gp = (sgot->output_section->vma
3252 + sgot->output_offset
3254 _bfd_set_gp_value (gotobj, gp);
3259 relend = relocs + input_section->reloc_count;
3260 for (; rel < relend; rel++)
3263 reloc_howto_type *howto;
3264 unsigned long r_symndx;
3265 struct alpha_elf_link_hash_entry *h;
3266 Elf_Internal_Sym *sym;
3268 bfd_signed_vma addend;
3269 bfd_reloc_status_type r;
3271 r_type = ELF64_R_TYPE(rel->r_info);
3272 if (r_type < 0 || r_type >= (int) R_ALPHA_max)
3274 bfd_set_error (bfd_error_bad_value);
3277 howto = elf64_alpha_howto_table + r_type;
3279 r_symndx = ELF64_R_SYM(rel->r_info);
3281 if (info->relocateable)
3283 /* This is a relocateable link. We don't have to change
3284 anything, unless the reloc is against a section symbol,
3285 in which case we have to adjust according to where the
3286 section symbol winds up in the output section. */
3288 /* The symbol associated with GPDISP and LITUSE is
3289 immaterial. Only the addend is significant. */
3290 if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
3293 if (r_symndx < symtab_hdr->sh_info)
3295 sym = local_syms + r_symndx;
3296 if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
3298 sec = local_sections[r_symndx];
3299 rel->r_addend += sec->output_offset + sym->st_value;
3306 /* This is a final link. */
3312 if (r_symndx < symtab_hdr->sh_info)
3314 sym = local_syms + r_symndx;
3315 sec = local_sections[r_symndx];
3316 relocation = (sec->output_section->vma
3317 + sec->output_offset
3322 h = alpha_elf_sym_hashes (input_bfd)[r_symndx - symtab_hdr->sh_info];
3324 while (h->root.root.type == bfd_link_hash_indirect
3325 || h->root.root.type == bfd_link_hash_warning)
3326 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3328 if (h->root.root.type == bfd_link_hash_defined
3329 || h->root.root.type == bfd_link_hash_defweak)
3331 sec = h->root.root.u.def.section;
3333 if (sec->output_section == NULL)
3337 relocation = (h->root.root.u.def.value
3338 + sec->output_section->vma
3339 + sec->output_offset);
3342 else if (h->root.root.type == bfd_link_hash_undefweak)
3344 else if (info->shared && !info->symbolic
3345 && !info->no_undefined
3346 && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
3350 if (!((*info->callbacks->undefined_symbol)
3351 (info, h->root.root.root.string, input_bfd,
3352 input_section, rel->r_offset,
3353 (!info->shared || info->no_undefined
3354 || ELF_ST_VISIBILITY (h->root.other)))))
3359 addend = rel->r_addend;
3363 case R_ALPHA_GPDISP:
3365 bfd_byte *p_ldah, *p_lda;
3367 BFD_ASSERT(gp != 0);
3369 relocation = (input_section->output_section->vma
3370 + input_section->output_offset
3373 p_ldah = contents + rel->r_offset - input_section->vma;
3374 p_lda = p_ldah + rel->r_addend;
3376 r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - relocation,
3381 case R_ALPHA_LITERAL:
3383 struct alpha_elf_got_entry *gotent;
3384 boolean dynamic_symbol;
3386 BFD_ASSERT(sgot != NULL);
3387 BFD_ASSERT(gp != 0);
3391 gotent = h->got_entries;
3392 dynamic_symbol = alpha_elf_dynamic_symbol_p (&h->root, info);
3396 gotent = (alpha_elf_tdata(input_bfd)->
3397 local_got_entries[r_symndx]);
3398 dynamic_symbol = false;
3401 BFD_ASSERT(gotent != NULL);
3403 while (gotent->gotobj != gotobj || gotent->addend != addend)
3404 gotent = gotent->next;
3406 BFD_ASSERT(gotent->use_count >= 1);
3408 /* Initialize the .got entry's value. */
3409 if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE))
3411 bfd_put_64 (output_bfd, relocation+addend,
3412 sgot->contents + gotent->got_offset);
3414 /* If the symbol has been forced local, output a
3415 RELATIVE reloc, otherwise it will be handled in
3416 finish_dynamic_symbol. */
3417 if (info->shared && !dynamic_symbol)
3419 Elf_Internal_Rela outrel;
3421 BFD_ASSERT(srelgot != NULL);
3423 outrel.r_offset = (sgot->output_section->vma
3424 + sgot->output_offset
3425 + gotent->got_offset);
3426 outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
3427 outrel.r_addend = relocation+addend;
3429 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3430 ((Elf64_External_Rela *)
3432 + srelgot->reloc_count++);
3433 BFD_ASSERT (sizeof (Elf64_External_Rela)
3434 * srelgot->reloc_count
3435 <= srelgot->_cooked_size);
3438 gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE;
3441 /* Figure the gprel relocation. */
3443 relocation = (sgot->output_section->vma
3444 + sgot->output_offset
3445 + gotent->got_offset);
3448 /* overflow handled by _bfd_final_link_relocate */
3451 case R_ALPHA_GPREL16:
3452 case R_ALPHA_GPREL32:
3453 case R_ALPHA_GPRELLOW:
3454 if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
3456 (*_bfd_error_handler)
3457 (_("%s: gp-relative relocation against dynamic symbol %s"),
3458 bfd_get_filename (input_bfd), h->root.root.root.string);
3461 BFD_ASSERT(gp != 0);
3465 case R_ALPHA_GPRELHIGH:
3466 if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
3468 (*_bfd_error_handler)
3469 (_("%s: gp-relative relocation against dynamic symbol %s"),
3470 bfd_get_filename (input_bfd), h->root.root.root.string);
3473 BFD_ASSERT(gp != 0);
3475 relocation += addend;
3477 relocation = (((bfd_signed_vma) relocation >> 16)
3478 + ((relocation >> 15) & 1));
3482 /* A call to a dynamic symbol is definitely out of range of
3483 the 16-bit displacement. Don't bother writing anything. */
3484 if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
3491 case R_ALPHA_BRADDR:
3492 /* The regular PC-relative stuff measures from the start of
3493 the instruction rather than the end. */
3497 case R_ALPHA_REFLONG:
3498 case R_ALPHA_REFQUAD:
3500 Elf_Internal_Rela outrel;
3503 /* Careful here to remember RELATIVE relocations for global
3504 variables for symbolic shared objects. */
3506 if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
3508 BFD_ASSERT(h->root.dynindx != -1);
3509 outrel.r_info = ELF64_R_INFO(h->root.dynindx, r_type);
3510 outrel.r_addend = addend;
3511 addend = 0, relocation = 0;
3513 else if (info->shared && (input_section->flags & SEC_ALLOC))
3515 outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
3516 outrel.r_addend = relocation + addend;
3525 name = (bfd_elf_string_from_elf_section
3526 (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
3527 elf_section_data(input_section)->rel_hdr.sh_name));
3528 BFD_ASSERT(name != NULL);
3530 srel = bfd_get_section_by_name (dynobj, name);
3531 BFD_ASSERT(srel != NULL);
3536 if (elf_section_data (input_section)->stab_info == NULL)
3537 outrel.r_offset = rel->r_offset;
3542 off = (_bfd_stab_section_offset
3543 (output_bfd, &elf_hash_table (info)->stab_info,
3545 &elf_section_data (input_section)->stab_info,
3547 if (off == (bfd_vma) -1)
3549 outrel.r_offset = off;
3553 outrel.r_offset += (input_section->output_section->vma
3554 + input_section->output_offset);
3556 memset (&outrel, 0, sizeof outrel);
3558 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3559 ((Elf64_External_Rela *)
3561 + srel->reloc_count++);
3562 BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
3563 <= srel->_cooked_size);
3569 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3570 contents, rel->r_offset, relocation,
3580 case bfd_reloc_overflow:
3585 name = h->root.root.root.string;
3588 name = (bfd_elf_string_from_elf_section
3589 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3593 name = bfd_section_name (input_bfd, sec);
3595 if (! ((*info->callbacks->reloc_overflow)
3596 (info, name, howto->name, (bfd_vma) 0,
3597 input_bfd, input_section, rel->r_offset)))
3603 case bfd_reloc_outofrange:
3611 /* Finish up dynamic symbol handling. We set the contents of various
3612 dynamic sections here. */
3615 elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
3617 struct bfd_link_info *info;
3618 struct elf_link_hash_entry *h;
3619 Elf_Internal_Sym *sym;
3621 bfd *dynobj = elf_hash_table(info)->dynobj;
3623 if (h->plt.offset != MINUS_ONE)
3625 /* Fill in the .plt entry for this symbol. */
3626 asection *splt, *sgot, *srel;
3627 Elf_Internal_Rela outrel;
3628 bfd_vma got_addr, plt_addr;
3630 struct alpha_elf_got_entry *gotent;
3632 BFD_ASSERT (h->dynindx != -1);
3634 /* The first .got entry will be updated by the .plt with the
3635 address of the target function. */
3636 gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
3637 BFD_ASSERT (gotent && gotent->addend == 0);
3639 splt = bfd_get_section_by_name (dynobj, ".plt");
3640 BFD_ASSERT (splt != NULL);
3641 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
3642 BFD_ASSERT (srel != NULL);
3643 sgot = alpha_elf_tdata (gotent->gotobj)->got;
3644 BFD_ASSERT (sgot != NULL);
3646 got_addr = (sgot->output_section->vma
3647 + sgot->output_offset
3648 + gotent->got_offset);
3649 plt_addr = (splt->output_section->vma
3650 + splt->output_offset
3653 plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
3655 /* Fill in the entry in the procedure linkage table. */
3657 unsigned insn1, insn2, insn3;
3659 insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff);
3660 insn2 = PLT_ENTRY_WORD2;
3661 insn3 = PLT_ENTRY_WORD3;
3663 bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset);
3664 bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4);
3665 bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8);
3668 /* Fill in the entry in the .rela.plt section. */
3669 outrel.r_offset = got_addr;
3670 outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
3671 outrel.r_addend = 0;
3673 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3674 ((Elf64_External_Rela *)srel->contents
3677 if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3679 /* Mark the symbol as undefined, rather than as defined in the
3680 .plt section. Leave the value alone. */
3681 sym->st_shndx = SHN_UNDEF;
3684 /* Fill in the entries in the .got. */
3685 bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset);
3687 /* Subsequent .got entries will continue to bounce through the .plt. */
3690 srel = bfd_get_section_by_name (dynobj, ".rela.got");
3691 BFD_ASSERT (! info->shared || srel != NULL);
3693 gotent = gotent->next;
3696 sgot = alpha_elf_tdata(gotent->gotobj)->got;
3697 BFD_ASSERT(sgot != NULL);
3698 BFD_ASSERT(gotent->addend == 0);
3700 bfd_put_64 (output_bfd, plt_addr,
3701 sgot->contents + gotent->got_offset);
3705 outrel.r_offset = (sgot->output_section->vma
3706 + sgot->output_offset
3707 + gotent->got_offset);
3708 outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
3709 outrel.r_addend = plt_addr;
3711 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3712 ((Elf64_External_Rela *)
3714 + srel->reloc_count++);
3715 BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
3716 <= srel->_cooked_size);
3719 gotent = gotent->next;
3721 while (gotent != NULL);
3724 else if (alpha_elf_dynamic_symbol_p (h, info))
3726 /* Fill in the dynamic relocations for this symbol's .got entries. */
3728 Elf_Internal_Rela outrel;
3729 struct alpha_elf_got_entry *gotent;
3731 srel = bfd_get_section_by_name (dynobj, ".rela.got");
3732 BFD_ASSERT (srel != NULL);
3734 outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_GLOB_DAT);
3735 for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
3737 gotent = gotent->next)
3739 asection *sgot = alpha_elf_tdata (gotent->gotobj)->got;
3740 outrel.r_offset = (sgot->output_section->vma
3741 + sgot->output_offset
3742 + gotent->got_offset);
3743 outrel.r_addend = gotent->addend;
3745 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3746 ((Elf64_External_Rela *)srel->contents
3747 + srel->reloc_count++));
3748 BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
3749 <= srel->_cooked_size);
3753 /* Mark some specially defined symbols as absolute. */
3754 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3755 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3756 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3757 sym->st_shndx = SHN_ABS;
3762 /* Finish up the dynamic sections. */
3765 elf64_alpha_finish_dynamic_sections (output_bfd, info)
3767 struct bfd_link_info *info;
3772 dynobj = elf_hash_table (info)->dynobj;
3773 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3775 if (elf_hash_table (info)->dynamic_sections_created)
3778 Elf64_External_Dyn *dyncon, *dynconend;
3780 splt = bfd_get_section_by_name (dynobj, ".plt");
3781 BFD_ASSERT (splt != NULL && sdyn != NULL);
3783 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3784 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3785 for (; dyncon < dynconend; dyncon++)
3787 Elf_Internal_Dyn dyn;
3791 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3806 /* My interpretation of the TIS v1.1 ELF document indicates
3807 that RELASZ should not include JMPREL. This is not what
3808 the rest of the BFD does. It is, however, what the
3809 glibc ld.so wants. Do this fixup here until we found
3810 out who is right. */
3811 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
3815 (s->_cooked_size ? s->_cooked_size : s->_raw_size);
3820 s = bfd_get_section_by_name (output_bfd, name);
3821 dyn.d_un.d_ptr = (s ? s->vma : 0);
3825 s = bfd_get_section_by_name (output_bfd, name);
3827 (s->_cooked_size ? s->_cooked_size : s->_raw_size);
3831 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3834 /* Initialize the PLT0 entry */
3835 if (splt->_raw_size > 0)
3837 bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents);
3838 bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4);
3839 bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8);
3840 bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12);
3842 /* The next two words will be filled in by ld.so */
3843 bfd_put_64 (output_bfd, 0, splt->contents + 16);
3844 bfd_put_64 (output_bfd, 0, splt->contents + 24);
3846 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3854 /* We need to use a special link routine to handle the .mdebug section.
3855 We need to merge all instances of these sections together, not write
3856 them all out sequentially. */
3859 elf64_alpha_final_link (abfd, info)
3861 struct bfd_link_info *info;
3864 struct bfd_link_order *p;
3865 asection *mdebug_sec;
3866 struct ecoff_debug_info debug;
3867 const struct ecoff_debug_swap *swap
3868 = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
3869 HDRR *symhdr = &debug.symbolic_header;
3870 PTR mdebug_handle = NULL;
3872 /* Go through the sections and collect the mdebug information. */
3874 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
3876 if (strcmp (o->name, ".mdebug") == 0)
3878 struct extsym_info einfo;
3880 /* We have found the .mdebug section in the output file.
3881 Look through all the link_orders comprising it and merge
3882 the information together. */
3883 symhdr->magic = swap->sym_magic;
3884 /* FIXME: What should the version stamp be? */
3886 symhdr->ilineMax = 0;
3890 symhdr->isymMax = 0;
3891 symhdr->ioptMax = 0;
3892 symhdr->iauxMax = 0;
3894 symhdr->issExtMax = 0;
3897 symhdr->iextMax = 0;
3899 /* We accumulate the debugging information itself in the
3900 debug_info structure. */
3902 debug.external_dnr = NULL;
3903 debug.external_pdr = NULL;
3904 debug.external_sym = NULL;
3905 debug.external_opt = NULL;
3906 debug.external_aux = NULL;
3908 debug.ssext = debug.ssext_end = NULL;
3909 debug.external_fdr = NULL;
3910 debug.external_rfd = NULL;
3911 debug.external_ext = debug.external_ext_end = NULL;
3913 mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
3914 if (mdebug_handle == (PTR) NULL)
3923 static const char * const name[] =
3925 ".text", ".init", ".fini", ".data",
3926 ".rodata", ".sdata", ".sbss", ".bss"
3928 static const int sc[] = { scText, scInit, scFini, scData,
3929 scRData, scSData, scSBss, scBss };
3932 esym.cobol_main = 0;
3936 esym.asym.iss = issNil;
3937 esym.asym.st = stLocal;
3938 esym.asym.reserved = 0;
3939 esym.asym.index = indexNil;
3940 for (i = 0; i < 8; i++)
3942 esym.asym.sc = sc[i];
3943 s = bfd_get_section_by_name (abfd, name[i]);
3946 esym.asym.value = s->vma;
3947 last = s->vma + s->_raw_size;
3950 esym.asym.value = last;
3952 if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
3958 for (p = o->link_order_head;
3959 p != (struct bfd_link_order *) NULL;
3962 asection *input_section;
3964 const struct ecoff_debug_swap *input_swap;
3965 struct ecoff_debug_info input_debug;
3969 if (p->type != bfd_indirect_link_order)
3971 if (p->type == bfd_fill_link_order)
3976 input_section = p->u.indirect.section;
3977 input_bfd = input_section->owner;
3979 if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
3980 || (get_elf_backend_data (input_bfd)
3981 ->elf_backend_ecoff_debug_swap) == NULL)
3983 /* I don't know what a non ALPHA ELF bfd would be
3984 doing with a .mdebug section, but I don't really
3985 want to deal with it. */
3989 input_swap = (get_elf_backend_data (input_bfd)
3990 ->elf_backend_ecoff_debug_swap);
3992 BFD_ASSERT (p->size == input_section->_raw_size);
3994 /* The ECOFF linking code expects that we have already
3995 read in the debugging information and set up an
3996 ecoff_debug_info structure, so we do that now. */
3997 if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
4001 if (! (bfd_ecoff_debug_accumulate
4002 (mdebug_handle, abfd, &debug, swap, input_bfd,
4003 &input_debug, input_swap, info)))
4006 /* Loop through the external symbols. For each one with
4007 interesting information, try to find the symbol in
4008 the linker global hash table and save the information
4009 for the output external symbols. */
4010 eraw_src = input_debug.external_ext;
4011 eraw_end = (eraw_src
4012 + (input_debug.symbolic_header.iextMax
4013 * input_swap->external_ext_size));
4015 eraw_src < eraw_end;
4016 eraw_src += input_swap->external_ext_size)
4020 struct alpha_elf_link_hash_entry *h;
4022 (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
4023 if (ext.asym.sc == scNil
4024 || ext.asym.sc == scUndefined
4025 || ext.asym.sc == scSUndefined)
4028 name = input_debug.ssext + ext.asym.iss;
4029 h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info),
4030 name, false, false, true);
4031 if (h == NULL || h->esym.ifd != -2)
4037 < input_debug.symbolic_header.ifdMax);
4038 ext.ifd = input_debug.ifdmap[ext.ifd];
4044 /* Free up the information we just read. */
4045 free (input_debug.line);
4046 free (input_debug.external_dnr);
4047 free (input_debug.external_pdr);
4048 free (input_debug.external_sym);
4049 free (input_debug.external_opt);
4050 free (input_debug.external_aux);
4051 free (input_debug.ss);
4052 free (input_debug.ssext);
4053 free (input_debug.external_fdr);
4054 free (input_debug.external_rfd);
4055 free (input_debug.external_ext);
4057 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4058 elf_link_input_bfd ignores this section. */
4059 input_section->flags &=~ SEC_HAS_CONTENTS;
4062 /* Build the external symbol information. */
4065 einfo.debug = &debug;
4067 einfo.failed = false;
4068 elf_link_hash_traverse (elf_hash_table (info),
4069 elf64_alpha_output_extsym,
4074 /* Set the size of the .mdebug section. */
4075 o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
4077 /* Skip this section later on (I don't think this currently
4078 matters, but someday it might). */
4079 o->link_order_head = (struct bfd_link_order *) NULL;
4085 /* Invoke the regular ELF backend linker to do all the work. */
4086 if (! bfd_elf64_bfd_final_link (abfd, info))
4089 /* Now write out the computed sections. */
4091 /* The .got subsections... */
4093 bfd *i, *dynobj = elf_hash_table(info)->dynobj;
4094 for (i = alpha_elf_hash_table(info)->got_list;
4096 i = alpha_elf_tdata(i)->got_link_next)
4100 /* elf_bfd_final_link already did everything in dynobj. */
4104 sgot = alpha_elf_tdata(i)->got;
4105 if (! bfd_set_section_contents (abfd, sgot->output_section,
4106 sgot->contents, sgot->output_offset,
4112 if (mdebug_sec != (asection *) NULL)
4114 BFD_ASSERT (abfd->output_has_begun);
4115 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
4117 mdebug_sec->filepos))
4120 bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
4126 static enum elf_reloc_type_class
4127 elf64_alpha_reloc_type_class (type)
4132 case R_ALPHA_RELATIVE:
4133 return reloc_class_relative;
4134 case R_ALPHA_JMP_SLOT:
4135 return reloc_class_plt;
4137 return reloc_class_copy;
4139 return reloc_class_normal;
4143 /* ECOFF swapping routines. These are used when dealing with the
4144 .mdebug section, which is in the ECOFF debugging format. Copied
4145 from elf32-mips.c. */
4146 static const struct ecoff_debug_swap
4147 elf64_alpha_ecoff_debug_swap =
4149 /* Symbol table magic number. */
4151 /* Alignment of debugging information. E.g., 4. */
4153 /* Sizes of external symbolic information. */
4154 sizeof (struct hdr_ext),
4155 sizeof (struct dnr_ext),
4156 sizeof (struct pdr_ext),
4157 sizeof (struct sym_ext),
4158 sizeof (struct opt_ext),
4159 sizeof (struct fdr_ext),
4160 sizeof (struct rfd_ext),
4161 sizeof (struct ext_ext),
4162 /* Functions to swap in external symbolic data. */
4171 _bfd_ecoff_swap_tir_in,
4172 _bfd_ecoff_swap_rndx_in,
4173 /* Functions to swap out external symbolic data. */
4182 _bfd_ecoff_swap_tir_out,
4183 _bfd_ecoff_swap_rndx_out,
4184 /* Function to read in symbolic data. */
4185 elf64_alpha_read_ecoff_info
4188 /* Use a non-standard hash bucket size of 8. */
4190 const struct elf_size_info alpha_elf_size_info =
4192 sizeof (Elf64_External_Ehdr),
4193 sizeof (Elf64_External_Phdr),
4194 sizeof (Elf64_External_Shdr),
4195 sizeof (Elf64_External_Rel),
4196 sizeof (Elf64_External_Rela),
4197 sizeof (Elf64_External_Sym),
4198 sizeof (Elf64_External_Dyn),
4199 sizeof (Elf_External_Note),
4203 ELFCLASS64, EV_CURRENT,
4204 bfd_elf64_write_out_phdrs,
4205 bfd_elf64_write_shdrs_and_ehdr,
4206 bfd_elf64_write_relocs,
4207 bfd_elf64_swap_symbol_out,
4208 bfd_elf64_slurp_reloc_table,
4209 bfd_elf64_slurp_symbol_table,
4210 bfd_elf64_swap_dyn_in,
4211 bfd_elf64_swap_dyn_out,
4218 #define TARGET_LITTLE_SYM bfd_elf64_alpha_vec
4219 #define TARGET_LITTLE_NAME "elf64-alpha"
4220 #define ELF_ARCH bfd_arch_alpha
4221 #define ELF_MACHINE_CODE EM_ALPHA
4222 #define ELF_MAXPAGESIZE 0x10000
4224 #define bfd_elf64_bfd_link_hash_table_create \
4225 elf64_alpha_bfd_link_hash_table_create
4227 #define bfd_elf64_bfd_reloc_type_lookup \
4228 elf64_alpha_bfd_reloc_type_lookup
4229 #define elf_info_to_howto \
4230 elf64_alpha_info_to_howto
4232 #define bfd_elf64_mkobject \
4233 elf64_alpha_mkobject
4234 #define elf_backend_object_p \
4235 elf64_alpha_object_p
4237 #define elf_backend_section_from_shdr \
4238 elf64_alpha_section_from_shdr
4239 #define elf_backend_section_flags \
4240 elf64_alpha_section_flags
4241 #define elf_backend_fake_sections \
4242 elf64_alpha_fake_sections
4244 #define bfd_elf64_bfd_is_local_label_name \
4245 elf64_alpha_is_local_label_name
4246 #define bfd_elf64_find_nearest_line \
4247 elf64_alpha_find_nearest_line
4248 #define bfd_elf64_bfd_relax_section \
4249 elf64_alpha_relax_section
4251 #define elf_backend_add_symbol_hook \
4252 elf64_alpha_add_symbol_hook
4253 #define elf_backend_check_relocs \
4254 elf64_alpha_check_relocs
4255 #define elf_backend_create_dynamic_sections \
4256 elf64_alpha_create_dynamic_sections
4257 #define elf_backend_adjust_dynamic_symbol \
4258 elf64_alpha_adjust_dynamic_symbol
4259 #define elf_backend_always_size_sections \
4260 elf64_alpha_always_size_sections
4261 #define elf_backend_size_dynamic_sections \
4262 elf64_alpha_size_dynamic_sections
4263 #define elf_backend_relocate_section \
4264 elf64_alpha_relocate_section
4265 #define elf_backend_finish_dynamic_symbol \
4266 elf64_alpha_finish_dynamic_symbol
4267 #define elf_backend_finish_dynamic_sections \
4268 elf64_alpha_finish_dynamic_sections
4269 #define bfd_elf64_bfd_final_link \
4270 elf64_alpha_final_link
4271 #define elf_backend_reloc_type_class \
4272 elf64_alpha_reloc_type_class
4274 #define elf_backend_ecoff_debug_swap \
4275 &elf64_alpha_ecoff_debug_swap
4277 #define elf_backend_size_info \
4280 /* A few constants that determine how the .plt section is set up. */
4281 #define elf_backend_want_got_plt 0
4282 #define elf_backend_plt_readonly 0
4283 #define elf_backend_want_plt_sym 1
4284 #define elf_backend_got_header_size 0
4285 #define elf_backend_plt_header_size PLT_HEADER_SIZE
4287 #include "elf64-target.h"