1 /* Alpha specific support for 64-bit ELF
2 Copyright 1996, 1997, 1998 Free Software Foundation, Inc.
3 Contributed by Richard Henderson <rth@tamu.edu>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* We need a published ABI spec for this. Until one comes out, don't
22 assume this'll remain unchanged forever. */
29 #include "elf/alpha.h"
33 #define NO_COFF_RELOCS
34 #define NO_COFF_SYMBOLS
35 #define NO_COFF_LINENOS
37 /* Get the ECOFF swapping routines. Needed for the debug information. */
38 #include "coff/internal.h"
40 #include "coff/symconst.h"
41 #include "coff/ecoff.h"
42 #include "coff/alpha.h"
47 #include "ecoffswap.h"
49 static boolean elf64_alpha_mkobject PARAMS ((bfd *));
50 static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc
51 PARAMS((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
52 static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create
55 static bfd_reloc_status_type elf64_alpha_reloc_nil
56 PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
57 static bfd_reloc_status_type elf64_alpha_reloc_bad
58 PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
59 static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp
60 PARAMS((bfd *, bfd_vma, bfd_byte *, bfd_byte *));
61 static bfd_reloc_status_type elf64_alpha_reloc_gpdisp
62 PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
64 static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup
65 PARAMS((bfd *, bfd_reloc_code_real_type));
66 static void elf64_alpha_info_to_howto
67 PARAMS((bfd *, arelent *, Elf64_Internal_Rela *));
69 static boolean elf64_alpha_object_p
71 static boolean elf64_alpha_section_from_shdr
72 PARAMS((bfd *, Elf64_Internal_Shdr *, char *));
73 static boolean elf64_alpha_fake_sections
74 PARAMS((bfd *, Elf64_Internal_Shdr *, asection *));
75 static int elf64_alpha_additional_program_headers
77 static boolean elf64_alpha_create_got_section
78 PARAMS((bfd *, struct bfd_link_info *));
79 static boolean elf64_alpha_create_dynamic_sections
80 PARAMS((bfd *, struct bfd_link_info *));
82 static boolean elf64_alpha_read_ecoff_info
83 PARAMS((bfd *, asection *, struct ecoff_debug_info *));
84 static boolean elf64_alpha_is_local_label_name
85 PARAMS((bfd *, const char *));
86 static boolean elf64_alpha_find_nearest_line
87 PARAMS((bfd *, asection *, asymbol **, bfd_vma, const char **,
88 const char **, unsigned int *));
90 #if defined(__STDC__) || defined(ALMOST_STDC)
91 struct alpha_elf_link_hash_entry;
94 static boolean elf64_alpha_output_extsym
95 PARAMS((struct alpha_elf_link_hash_entry *, PTR));
97 static boolean elf64_alpha_can_merge_gots
98 PARAMS((bfd *, bfd *));
99 static void elf64_alpha_merge_gots
100 PARAMS((bfd *, bfd *));
101 static boolean elf64_alpha_calc_got_offsets_for_symbol
102 PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
103 static void elf64_alpha_calc_got_offsets PARAMS ((struct bfd_link_info *));
104 static void elf64_alpha_strip_section_from_output PARAMS ((asection *));
105 static boolean elf64_alpha_size_got_sections
106 PARAMS ((bfd *, struct bfd_link_info *));
107 static boolean elf64_alpha_always_size_sections
108 PARAMS ((bfd *, struct bfd_link_info *));
109 static boolean elf64_alpha_calc_dynrel_sizes
110 PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
111 static boolean elf64_alpha_add_symbol_hook
112 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
113 const char **, flagword *, asection **, bfd_vma *));
114 static boolean elf64_alpha_check_relocs
115 PARAMS((bfd *, struct bfd_link_info *, asection *sec,
116 const Elf_Internal_Rela *));
117 static boolean elf64_alpha_adjust_dynamic_symbol
118 PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *));
119 static boolean elf64_alpha_size_dynamic_sections
120 PARAMS((bfd *, struct bfd_link_info *));
121 static boolean elf64_alpha_adjust_dynindx
122 PARAMS((struct elf_link_hash_entry *, PTR));
123 static boolean elf64_alpha_relocate_section
124 PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
125 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
126 static boolean elf64_alpha_finish_dynamic_symbol
127 PARAMS((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
128 Elf_Internal_Sym *));
129 static boolean elf64_alpha_finish_dynamic_sections
130 PARAMS((bfd *, struct bfd_link_info *));
131 static boolean elf64_alpha_final_link
132 PARAMS((bfd *, struct bfd_link_info *));
135 struct alpha_elf_link_hash_entry
137 struct elf_link_hash_entry root;
139 /* External symbol information. */
142 /* Cumulative flags for all the .got entries. */
145 /* Contexts (LITUSE) in which a literal was referenced. */
146 #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
147 #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
148 #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
149 #define ALPHA_ELF_LINK_HASH_LU_FUNC 0x08
151 /* Used to implement multiple .got subsections. */
152 struct alpha_elf_got_entry
154 struct alpha_elf_got_entry *next;
156 /* which .got subsection? */
159 /* the addend in effect for this entry. */
162 /* the .got offset for this entry. */
167 /* An additional flag. */
168 #define ALPHA_ELF_GOT_ENTRY_RELOCS_DONE 0x10
173 /* used to count non-got, non-plt relocations for delayed sizing
174 of relocation sections. */
175 struct alpha_elf_reloc_entry
177 struct alpha_elf_reloc_entry *next;
179 /* which .reloc section? */
182 /* what kind of relocation? */
185 /* how many did we find? */
190 /* Alpha ELF linker hash table. */
192 struct alpha_elf_link_hash_table
194 struct elf_link_hash_table root;
196 /* The head of a list of .got subsections linked through
197 alpha_elf_tdata(abfd)->got_link_next. */
201 /* Look up an entry in a Alpha ELF linker hash table. */
203 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
204 ((struct alpha_elf_link_hash_entry *) \
205 elf_link_hash_lookup (&(table)->root, (string), (create), \
208 /* Traverse a Alpha ELF linker hash table. */
210 #define alpha_elf_link_hash_traverse(table, func, info) \
211 (elf_link_hash_traverse \
213 (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
216 /* Get the Alpha ELF linker hash table from a link_info structure. */
218 #define alpha_elf_hash_table(p) \
219 ((struct alpha_elf_link_hash_table *) ((p)->hash))
221 /* Get the object's symbols as our own entry type. */
223 #define alpha_elf_sym_hashes(abfd) \
224 ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
226 /* Should we do dynamic things to this symbol? */
228 #define alpha_elf_dynamic_symbol_p(h, info) \
229 (((info)->shared && !(info)->symbolic && (h)->dynindx != -1) \
230 || (((h)->elf_link_hash_flags \
231 & (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) \
232 == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)))
234 /* Create an entry in a Alpha ELF linker hash table. */
236 static struct bfd_hash_entry *
237 elf64_alpha_link_hash_newfunc (entry, table, string)
238 struct bfd_hash_entry *entry;
239 struct bfd_hash_table *table;
242 struct alpha_elf_link_hash_entry *ret =
243 (struct alpha_elf_link_hash_entry *) entry;
245 /* Allocate the structure if it has not already been allocated by a
247 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
248 ret = ((struct alpha_elf_link_hash_entry *)
249 bfd_hash_allocate (table,
250 sizeof (struct alpha_elf_link_hash_entry)));
251 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
252 return (struct bfd_hash_entry *) ret;
254 /* Call the allocation method of the superclass. */
255 ret = ((struct alpha_elf_link_hash_entry *)
256 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
258 if (ret != (struct alpha_elf_link_hash_entry *) NULL)
260 /* Set local fields. */
261 memset (&ret->esym, 0, sizeof (EXTR));
262 /* We use -2 as a marker to indicate that the information has
263 not been set. -1 means there is no associated ifd. */
266 ret->got_entries = NULL;
267 ret->reloc_entries = NULL;
270 return (struct bfd_hash_entry *) ret;
273 /* Create a Alpha ELF linker hash table. */
275 static struct bfd_link_hash_table *
276 elf64_alpha_bfd_link_hash_table_create (abfd)
279 struct alpha_elf_link_hash_table *ret;
281 ret = ((struct alpha_elf_link_hash_table *)
282 bfd_zalloc (abfd, sizeof (struct alpha_elf_link_hash_table)));
283 if (ret == (struct alpha_elf_link_hash_table *) NULL)
286 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
287 elf64_alpha_link_hash_newfunc))
289 bfd_release (abfd, ret);
293 return &ret->root.root;
296 /* We have some private fields hanging off of the elf_tdata structure. */
298 struct alpha_elf_obj_tdata
300 struct elf_obj_tdata root;
302 /* For every input file, these are the got entries for that object's
304 struct alpha_elf_got_entry ** local_got_entries;
306 /* For every input file, this is the object that owns the got that
307 this input file uses. */
310 /* For every got, this is a linked list through the objects using this got */
311 bfd *in_got_link_next;
313 /* For every got, this is a link to the next got subsegment. */
316 /* For every got, this is the section. */
319 /* For every got, this is it's total number of *entries*. */
320 int total_got_entries;
322 /* For every got, this is the sum of the number of *entries* required
323 to hold all of the member object's local got. */
324 int n_local_got_entries;
327 #define alpha_elf_tdata(abfd) \
328 ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
331 elf64_alpha_mkobject (abfd)
334 abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata));
335 if (abfd->tdata.any == NULL)
341 elf64_alpha_object_p (abfd)
344 /* Allocate our special target data. */
345 struct alpha_elf_obj_tdata *new_tdata;
346 new_tdata = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata));
347 if (new_tdata == NULL)
349 new_tdata->root = *abfd->tdata.elf_obj_data;
350 abfd->tdata.any = new_tdata;
352 /* Set the right machine number for an Alpha ELF file. */
353 return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
356 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
357 from smaller values. Start with zero, widen, *then* decrement. */
358 #define MINUS_ONE (((bfd_vma)0) - 1)
360 static reloc_howto_type elf64_alpha_howto_table[] =
362 HOWTO (R_ALPHA_NONE, /* type */
364 0, /* size (0 = byte, 1 = short, 2 = long) */
366 true, /* pc_relative */
368 complain_overflow_dont, /* complain_on_overflow */
369 elf64_alpha_reloc_nil, /* special_function */
371 false, /* partial_inplace */
374 true), /* pcrel_offset */
376 /* A 32 bit reference to a symbol. */
377 HOWTO (R_ALPHA_REFLONG, /* type */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
381 false, /* pc_relative */
383 complain_overflow_bitfield, /* complain_on_overflow */
384 0, /* special_function */
385 "REFLONG", /* name */
386 false, /* partial_inplace */
387 0xffffffff, /* src_mask */
388 0xffffffff, /* dst_mask */
389 false), /* pcrel_offset */
391 /* A 64 bit reference to a symbol. */
392 HOWTO (R_ALPHA_REFQUAD, /* type */
394 4, /* size (0 = byte, 1 = short, 2 = long) */
396 false, /* pc_relative */
398 complain_overflow_bitfield, /* complain_on_overflow */
399 0, /* special_function */
400 "REFQUAD", /* name */
401 false, /* partial_inplace */
402 MINUS_ONE, /* src_mask */
403 MINUS_ONE, /* dst_mask */
404 false), /* pcrel_offset */
406 /* A 32 bit GP relative offset. This is just like REFLONG except
407 that when the value is used the value of the gp register will be
409 HOWTO (R_ALPHA_GPREL32, /* type */
411 2, /* size (0 = byte, 1 = short, 2 = long) */
413 false, /* pc_relative */
415 complain_overflow_bitfield, /* complain_on_overflow */
416 0, /* special_function */
417 "GPREL32", /* name */
418 false, /* partial_inplace */
419 0xffffffff, /* src_mask */
420 0xffffffff, /* dst_mask */
421 false), /* pcrel_offset */
423 /* Used for an instruction that refers to memory off the GP register. */
424 HOWTO (R_ALPHA_LITERAL, /* type */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
428 false, /* pc_relative */
430 complain_overflow_signed, /* complain_on_overflow */
431 0, /* special_function */
432 "ELF_LITERAL", /* name */
433 false, /* partial_inplace */
434 0xffff, /* src_mask */
435 0xffff, /* dst_mask */
436 false), /* pcrel_offset */
438 /* This reloc only appears immediately following an ELF_LITERAL reloc.
439 It identifies a use of the literal. The symbol index is special:
440 1 means the literal address is in the base register of a memory
441 format instruction; 2 means the literal address is in the byte
442 offset register of a byte-manipulation instruction; 3 means the
443 literal address is in the target register of a jsr instruction.
444 This does not actually do any relocation. */
445 HOWTO (R_ALPHA_LITUSE, /* type */
447 2, /* size (0 = byte, 1 = short, 2 = long) */
449 false, /* pc_relative */
451 complain_overflow_dont, /* complain_on_overflow */
452 elf64_alpha_reloc_nil, /* special_function */
454 false, /* partial_inplace */
457 false), /* pcrel_offset */
459 /* Load the gp register. This is always used for a ldah instruction
460 which loads the upper 16 bits of the gp register. The symbol
461 index of the GPDISP instruction is an offset in bytes to the lda
462 instruction that loads the lower 16 bits. The value to use for
463 the relocation is the difference between the GP value and the
464 current location; the load will always be done against a register
465 holding the current address.
467 NOTE: Unlike ECOFF, partial in-place relocation is not done. If
468 any offset is present in the instructions, it is an offset from
469 the register to the ldah instruction. This lets us avoid any
470 stupid hackery like inventing a gp value to do partial relocation
471 against. Also unlike ECOFF, we do the whole relocation off of
472 the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
473 space consuming bit, that, since all the information was present
474 in the GPDISP_HI16 reloc. */
475 HOWTO (R_ALPHA_GPDISP, /* type */
477 2, /* size (0 = byte, 1 = short, 2 = long) */
479 false, /* pc_relative */
481 complain_overflow_dont, /* complain_on_overflow */
482 elf64_alpha_reloc_gpdisp, /* special_function */
484 false, /* partial_inplace */
485 0xffff, /* src_mask */
486 0xffff, /* dst_mask */
487 true), /* pcrel_offset */
489 /* A 21 bit branch. */
490 HOWTO (R_ALPHA_BRADDR, /* type */
492 2, /* size (0 = byte, 1 = short, 2 = long) */
494 true, /* pc_relative */
496 complain_overflow_signed, /* complain_on_overflow */
497 0, /* special_function */
499 false, /* partial_inplace */
500 0x1fffff, /* src_mask */
501 0x1fffff, /* dst_mask */
502 true), /* pcrel_offset */
504 /* A hint for a jump to a register. */
505 HOWTO (R_ALPHA_HINT, /* type */
507 2, /* size (0 = byte, 1 = short, 2 = long) */
509 true, /* pc_relative */
511 complain_overflow_dont, /* complain_on_overflow */
512 0, /* special_function */
514 false, /* partial_inplace */
515 0x3fff, /* src_mask */
516 0x3fff, /* dst_mask */
517 true), /* pcrel_offset */
519 /* 16 bit PC relative offset. */
520 HOWTO (R_ALPHA_SREL16, /* type */
522 1, /* size (0 = byte, 1 = short, 2 = long) */
524 true, /* pc_relative */
526 complain_overflow_signed, /* complain_on_overflow */
527 0, /* special_function */
529 false, /* partial_inplace */
530 0xffff, /* src_mask */
531 0xffff, /* dst_mask */
532 false), /* pcrel_offset */
534 /* 32 bit PC relative offset. */
535 HOWTO (R_ALPHA_SREL32, /* type */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
539 true, /* pc_relative */
541 complain_overflow_signed, /* complain_on_overflow */
542 0, /* special_function */
544 false, /* partial_inplace */
545 0xffffffff, /* src_mask */
546 0xffffffff, /* dst_mask */
547 false), /* pcrel_offset */
549 /* A 64 bit PC relative offset. */
550 HOWTO (R_ALPHA_SREL64, /* type */
552 4, /* size (0 = byte, 1 = short, 2 = long) */
554 true, /* pc_relative */
556 complain_overflow_signed, /* complain_on_overflow */
557 0, /* special_function */
559 false, /* partial_inplace */
560 MINUS_ONE, /* src_mask */
561 MINUS_ONE, /* dst_mask */
562 false), /* pcrel_offset */
564 /* Push a value on the reloc evaluation stack. */
565 /* Not implemented -- it's dumb. */
566 HOWTO (R_ALPHA_OP_PUSH, /* type */
568 0, /* size (0 = byte, 1 = short, 2 = long) */
570 false, /* pc_relative */
572 complain_overflow_dont, /* complain_on_overflow */
573 elf64_alpha_reloc_bad, /* special_function */
574 "OP_PUSH", /* name */
575 false, /* partial_inplace */
578 false), /* pcrel_offset */
580 /* Store the value from the stack at the given address. Store it in
581 a bitfield of size r_size starting at bit position r_offset. */
582 /* Not implemented -- it's dumb. */
583 HOWTO (R_ALPHA_OP_STORE, /* type */
585 4, /* size (0 = byte, 1 = short, 2 = long) */
587 false, /* pc_relative */
589 complain_overflow_dont, /* complain_on_overflow */
590 elf64_alpha_reloc_bad, /* special_function */
591 "OP_STORE", /* name */
592 false, /* partial_inplace */
594 MINUS_ONE, /* dst_mask */
595 false), /* pcrel_offset */
597 /* Subtract the reloc address from the value on the top of the
599 /* Not implemented -- it's dumb. */
600 HOWTO (R_ALPHA_OP_PSUB, /* type */
602 0, /* size (0 = byte, 1 = short, 2 = long) */
604 false, /* pc_relative */
606 complain_overflow_dont, /* complain_on_overflow */
607 elf64_alpha_reloc_bad, /* special_function */
608 "OP_PSUB", /* name */
609 false, /* partial_inplace */
612 false), /* pcrel_offset */
614 /* Shift the value on the top of the relocation stack right by the
616 /* Not implemented -- it's dumb. */
617 HOWTO (R_ALPHA_OP_PRSHIFT, /* type */
619 0, /* size (0 = byte, 1 = short, 2 = long) */
621 false, /* pc_relative */
623 complain_overflow_dont, /* complain_on_overflow */
624 elf64_alpha_reloc_bad, /* special_function */
625 "OP_PRSHIFT", /* name */
626 false, /* partial_inplace */
629 false), /* pcrel_offset */
631 /* Change the value of GP used by +r_addend until the next GPVALUE or the
632 end of the input bfd. */
633 /* Not implemented -- it's dumb. */
634 HOWTO (R_ALPHA_GPVALUE,
636 0, /* size (0 = byte, 1 = short, 2 = long) */
638 false, /* pc_relative */
640 complain_overflow_dont, /* complain_on_overflow */
641 elf64_alpha_reloc_bad, /* special_function */
642 "GPVALUE", /* name */
643 false, /* partial_inplace */
646 false), /* pcrel_offset */
648 /* The high 16 bits of the displacement from GP to the target. */
649 HOWTO (R_ALPHA_GPRELHIGH,
651 2, /* size (0 = byte, 1 = short, 2 = long) */
653 false, /* pc_relative */
655 complain_overflow_signed, /* complain_on_overflow */
656 elf64_alpha_reloc_bad, /* special_function */
657 "GPRELHIGH", /* name */
658 false, /* partial_inplace */
659 0xffff, /* src_mask */
660 0xffff, /* dst_mask */
661 false), /* pcrel_offset */
663 /* The low 16 bits of the displacement from GP to the target. */
664 HOWTO (R_ALPHA_GPRELLOW,
666 2, /* size (0 = byte, 1 = short, 2 = long) */
668 false, /* pc_relative */
670 complain_overflow_dont, /* complain_on_overflow */
671 elf64_alpha_reloc_bad, /* special_function */
672 "GPRELLOW", /* name */
673 false, /* partial_inplace */
674 0xffff, /* src_mask */
675 0xffff, /* dst_mask */
676 false), /* pcrel_offset */
678 /* A 16-bit displacement from the GP to the target. */
679 /* XXX: Not implemented. */
680 HOWTO (R_ALPHA_IMMED_GP_16,
682 2, /* size (0 = byte, 1 = short, 2 = long) */
684 false, /* pc_relative */
686 complain_overflow_signed, /* complain_on_overflow */
687 0, /* special_function */
688 "IMMED_GP_16", /* name */
689 false, /* partial_inplace */
690 0xffff, /* src_mask */
691 0xffff, /* dst_mask */
692 false), /* pcrel_offset */
694 /* The high bits of a 32-bit displacement from the GP to the target; the
695 low bits are supplied in the subsequent R_ALPHA_IMMED_LO32 relocs. */
696 /* XXX: Not implemented. */
697 HOWTO (R_ALPHA_IMMED_GP_HI32,
699 0, /* size (0 = byte, 1 = short, 2 = long) */
701 false, /* pc_relative */
703 complain_overflow_dont, /* complain_on_overflow */
704 elf64_alpha_reloc_bad, /* special_function */
705 "IMMED_GP_HI32", /* name */
706 false, /* partial_inplace */
709 false), /* pcrel_offset */
711 /* The high bits of a 32-bit displacement to the starting address of the
712 current section (the relocation target is ignored); the low bits are
713 supplied in the subsequent R_ALPHA_IMMED_LO32 relocs. */
714 /* XXX: Not implemented. */
715 HOWTO (R_ALPHA_IMMED_SCN_HI32,
717 0, /* size (0 = byte, 1 = short, 2 = long) */
719 false, /* pc_relative */
721 complain_overflow_dont, /* complain_on_overflow */
722 elf64_alpha_reloc_bad, /* special_function */
723 "IMMED_SCN_HI32", /* name */
724 false, /* partial_inplace */
727 false), /* pcrel_offset */
729 /* The high bits of a 32-bit displacement from the previous br, bsr, jsr
730 or jmp insn (as tagged by a BRADDR or HINT reloc) to the target; the
731 low bits are supplied by subsequent R_ALPHA_IMMED_LO32 relocs. */
732 /* XXX: Not implemented. */
733 HOWTO (R_ALPHA_IMMED_BR_HI32,
735 0, /* size (0 = byte, 1 = short, 2 = long) */
737 false, /* pc_relative */
739 complain_overflow_dont, /* complain_on_overflow */
740 elf64_alpha_reloc_bad, /* special_function */
741 "IMMED_BR_HI32", /* name */
742 false, /* partial_inplace */
745 false), /* pcrel_offset */
747 /* The low 16 bits of a displacement calculated in a previous HI32 reloc. */
748 /* XXX: Not implemented. */
749 HOWTO (R_ALPHA_IMMED_LO32,
751 0, /* size (0 = byte, 1 = short, 2 = long) */
753 false, /* pc_relative */
755 complain_overflow_dont, /* complain_on_overflow */
756 elf64_alpha_reloc_bad, /* special_function */
757 "IMMED_LO32", /* name */
758 false, /* partial_inplace */
761 false), /* pcrel_offset */
763 /* Misc ELF relocations. */
765 /* A dynamic relocation to copy the target into our .dynbss section. */
766 /* Not generated, as all Alpha objects use PIC, so it is not needed. It
767 is present because every other ELF has one, but should not be used
768 because .dynbss is an ugly thing. */
775 complain_overflow_dont,
776 bfd_elf_generic_reloc,
783 /* A dynamic relocation for a .got entry. */
784 HOWTO (R_ALPHA_GLOB_DAT,
790 complain_overflow_dont,
791 bfd_elf_generic_reloc,
798 /* A dynamic relocation for a .plt entry. */
799 HOWTO (R_ALPHA_JMP_SLOT,
805 complain_overflow_dont,
806 bfd_elf_generic_reloc,
813 /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
814 HOWTO (R_ALPHA_RELATIVE,
820 complain_overflow_dont,
821 bfd_elf_generic_reloc,
829 /* A relocation function which doesn't do anything. */
831 static bfd_reloc_status_type
832 elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
839 char **error_message;
842 reloc->address += sec->output_offset;
846 /* A relocation function used for an unsupported reloc. */
848 static bfd_reloc_status_type
849 elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message)
856 char **error_message;
859 reloc->address += sec->output_offset;
860 return bfd_reloc_notsupported;
863 /* Do the work of the GPDISP relocation. */
865 static bfd_reloc_status_type
866 elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda)
872 bfd_reloc_status_type ret = bfd_reloc_ok;
874 unsigned long i_ldah, i_lda;
876 i_ldah = bfd_get_32 (abfd, p_ldah);
877 i_lda = bfd_get_32 (abfd, p_lda);
879 /* Complain if the instructions are not correct. */
880 if (((i_ldah >> 26) & 0x3f) != 0x09
881 || ((i_lda >> 26) & 0x3f) != 0x08)
882 ret = bfd_reloc_dangerous;
884 /* Extract the user-supplied offset, mirroring the sign extensions
885 that the instructions perform. */
886 addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
887 addend = (addend ^ 0x80008000) - 0x80008000;
891 if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
892 || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
893 ret = bfd_reloc_overflow;
895 /* compensate for the sign extension again. */
896 i_ldah = ((i_ldah & 0xffff0000)
897 | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
898 i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
900 bfd_put_32 (abfd, i_ldah, p_ldah);
901 bfd_put_32 (abfd, i_lda, p_lda);
906 /* The special function for the GPDISP reloc. */
908 static bfd_reloc_status_type
909 elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section,
912 arelent *reloc_entry;
915 asection *input_section;
919 bfd_reloc_status_type ret;
920 bfd_vma gp, relocation;
921 bfd_byte *p_ldah, *p_lda;
923 /* Don't do anything if we're not doing a final link. */
926 reloc_entry->address += input_section->output_offset;
930 if (reloc_entry->address > input_section->_cooked_size ||
931 reloc_entry->address + reloc_entry->addend > input_section->_cooked_size)
932 return bfd_reloc_outofrange;
934 /* The gp used in the portion of the output object to which this
935 input object belongs is cached on the input bfd. */
936 gp = _bfd_get_gp_value (abfd);
938 relocation = (input_section->output_section->vma
939 + input_section->output_offset
940 + reloc_entry->address);
942 p_ldah = (bfd_byte *) data + reloc_entry->address;
943 p_lda = p_ldah + reloc_entry->addend;
945 ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
947 /* Complain if the instructions are not correct. */
948 if (ret == bfd_reloc_dangerous)
949 *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
954 /* A mapping from BFD reloc types to Alpha ELF reloc types. */
958 bfd_reloc_code_real_type bfd_reloc_val;
962 static const struct elf_reloc_map elf64_alpha_reloc_map[] =
964 {BFD_RELOC_NONE, R_ALPHA_NONE},
965 {BFD_RELOC_32, R_ALPHA_REFLONG},
966 {BFD_RELOC_64, R_ALPHA_REFQUAD},
967 {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
968 {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
969 {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
970 {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
971 {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
972 {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
973 {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
974 {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
975 {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
976 {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
979 /* Given a BFD reloc type, return a HOWTO structure. */
981 static reloc_howto_type *
982 elf64_alpha_bfd_reloc_type_lookup (abfd, code)
984 bfd_reloc_code_real_type code;
986 const struct elf_reloc_map *i, *e;
987 i = e = elf64_alpha_reloc_map;
988 e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
991 if (i->bfd_reloc_val == code)
992 return &elf64_alpha_howto_table[i->elf_reloc_val];
997 /* Given an Alpha ELF reloc type, fill in an arelent structure. */
1000 elf64_alpha_info_to_howto (abfd, cache_ptr, dst)
1003 Elf64_Internal_Rela *dst;
1007 r_type = ELF64_R_TYPE(dst->r_info);
1008 BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
1009 cache_ptr->howto = &elf64_alpha_howto_table[r_type];
1012 /* These functions do relaxation for Alpha ELF.
1014 Currently I'm only handling what I can do with existing compiler
1015 and assembler support, which means no instructions are removed,
1016 though some may be nopped. At this time GCC does not emit enough
1017 information to do all of the relaxing that is possible. It will
1018 take some not small amount of work for that to happen.
1020 There are a couple of interesting papers that I once read on this
1021 subject, that I cannot find references to at the moment, that
1022 related to Alpha in particular. They are by David Wall, then of
1026 #define OP_LDAH 0x09
1027 #define INSN_JSR 0x68004000
1028 #define INSN_JSR_MASK 0xfc00c000
1032 #define INSN_UNOP 0x2fe00000
1034 struct alpha_relax_info
1039 Elf_Internal_Rela *relocs, *relend;
1040 struct bfd_link_info *link_info;
1041 boolean changed_contents;
1042 boolean changed_relocs;
1045 struct alpha_elf_link_hash_entry *h;
1046 struct alpha_elf_got_entry *gotent;
1049 static Elf_Internal_Rela * elf64_alpha_relax_with_lituse
1050 PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1051 Elf_Internal_Rela *irel, Elf_Internal_Rela *irelend));
1053 static boolean elf64_alpha_relax_without_lituse
1054 PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1055 Elf_Internal_Rela *irel));
1057 static bfd_vma elf64_alpha_relax_opt_call
1058 PARAMS((struct alpha_relax_info *info, bfd_vma symval));
1060 static boolean elf64_alpha_relax_section
1061 PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
1064 static Elf_Internal_Rela *
1065 elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type)
1066 Elf_Internal_Rela *rel, *relend;
1070 while (rel < relend)
1072 if (rel->r_offset == offset && ELF64_R_TYPE (rel->r_info) == type)
1079 static Elf_Internal_Rela *
1080 elf64_alpha_relax_with_lituse (info, symval, irel, irelend)
1081 struct alpha_relax_info *info;
1083 Elf_Internal_Rela *irel, *irelend;
1085 Elf_Internal_Rela *urel;
1086 int flags, count, i;
1087 bfd_signed_vma disp;
1090 boolean lit_reused = false;
1091 boolean all_optimized = true;
1092 unsigned int lit_insn;
1094 lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
1095 if (lit_insn >> 26 != OP_LDQ)
1097 ((*_bfd_error_handler)
1098 ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn",
1099 bfd_get_filename (info->abfd), info->sec->name,
1100 (unsigned long)irel->r_offset));
1104 /* Summarize how this particular LITERAL is used. */
1105 for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
1107 if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
1109 if (urel->r_addend >= 0 && urel->r_addend <= 3)
1110 flags |= 1 << urel->r_addend;
1113 /* A little preparation for the loop... */
1114 disp = symval - info->gp;
1115 fits16 = (disp >= -(bfd_signed_vma)0x8000 && disp < 0x8000);
1116 fits32 = (disp >= -(bfd_signed_vma)0x80000000 && disp < 0x7fff8000);
1118 for (urel = irel+1, i = 0; i < count; ++i, ++urel)
1121 insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
1123 switch (urel->r_addend)
1125 default: /* 0 = ADDRESS FORMAT */
1126 /* This type is really just a placeholder to note that all
1127 uses cannot be optimized, but to still allow some. */
1128 all_optimized = false;
1131 case 1: /* MEM FORMAT */
1132 /* We can always optimize 16-bit displacements. */
1135 /* FIXME: sanity check the insn for mem format with
1138 /* Take the op code and dest from this insn, take the base
1139 register from the literal insn. Leave the offset alone. */
1140 insn = (insn & 0xffe00000) | (lit_insn & 0x001f0000);
1141 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1143 urel->r_addend = irel->r_addend;
1144 info->changed_relocs = true;
1146 bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset);
1147 info->changed_contents = true;
1150 /* If all mem+byte, we can optimize 32-bit mem displacements. */
1151 else if (fits32 && !(flags & ~6))
1153 /* FIXME: sanity check that lit insn Ra is mem insn Rb, and
1154 that mem_insn disp is zero. */
1156 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1158 lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
1159 bfd_put_32 (info->abfd, lit_insn,
1160 info->contents + irel->r_offset);
1162 info->changed_contents = true;
1164 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1166 urel->r_addend = irel->r_addend;
1167 info->changed_relocs = true;
1170 all_optimized = false;
1173 case 2: /* BYTE OFFSET FORMAT */
1174 /* We can always optimize byte instructions. */
1176 /* FIXME: sanity check the insn for byte op. Check that the
1177 literal dest reg is indeed Rb in the byte insn. */
1179 insn = (insn & ~0x001ff000) | ((symval & 7) << 13) | 0x1000;
1181 urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1183 info->changed_relocs = true;
1185 bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset);
1186 info->changed_contents = true;
1189 case 3: /* CALL FORMAT */
1191 /* If not zero, place to jump without needing pv. */
1192 bfd_vma optdest = elf64_alpha_relax_opt_call (info, symval);
1193 bfd_vma org = (info->sec->output_section->vma
1194 + info->sec->output_offset
1195 + urel->r_offset + 4);
1196 bfd_signed_vma odisp;
1198 odisp = (optdest ? optdest : symval) - org;
1199 if (odisp >= -0x400000 && odisp < 0x400000)
1201 Elf_Internal_Rela *xrel;
1203 /* Preserve branch prediction call stack when possible. */
1204 if ((insn & INSN_JSR_MASK) == INSN_JSR)
1205 insn = (OP_BSR << 26) | (insn & 0x03e00000);
1207 insn = (OP_BR << 26) | (insn & 0x03e00000);
1209 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1211 urel->r_addend = irel->r_addend;
1212 info->changed_relocs = true;
1214 /* Kill any HINT reloc that might exist for this insn. */
1215 xrel = (elf64_alpha_find_reloc_at_ofs
1216 (info->relocs, info->relend, urel->r_offset,
1219 xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1222 urel->r_addend += optdest - symval;
1224 all_optimized = false;
1226 bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset);
1227 info->changed_contents = true;
1230 all_optimized = false;
1232 /* ??? If target gp == current gp we can eliminate the gp reload.
1233 This does depend on every place a gp could be reloaded will
1234 be, which currently happens for all code produced by gcc, but
1235 not necessarily by hand-coded assembly, or if sibling calls
1238 Perhaps conditionalize this on a flag being set in the target
1239 object file's header, and have gcc set it? */
1245 /* If all cases were optimized, we can reduce the use count on this
1246 got entry by one, possibly eliminating it. */
1249 info->gotent->use_count -= 1;
1250 alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1;
1252 alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1;
1254 /* If the literal instruction is no longer needed (it may have been
1255 reused. We can eliminate it.
1256 ??? For now, I don't want to deal with compacting the section,
1257 so just nop it out. */
1260 irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1261 info->changed_relocs = true;
1263 bfd_put_32 (info->abfd, INSN_UNOP, info->contents + irel->r_offset);
1264 info->changed_contents = true;
1268 return irel + count;
1272 elf64_alpha_relax_opt_call (info, symval)
1273 struct alpha_relax_info *info;
1276 /* If the function has the same gp, and we can identify that the
1277 function does not use its function pointer, we can eliminate the
1280 ??? The .prologue [0,1] information is what we need. How do we
1281 get it out of the mdebug uglyness? What shall we do when we drop
1282 that crap for dwarf2?
1284 For now, only consider the case in which there is an identifyable
1285 GP load in the first two words. We can then skip over that load. */
1291 elf64_alpha_relax_without_lituse (info, symval, irel)
1292 struct alpha_relax_info *info;
1294 Elf_Internal_Rela *irel;
1297 bfd_signed_vma disp;
1299 /* Get the instruction. */
1300 insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
1302 if (insn >> 26 != OP_LDQ)
1304 ((*_bfd_error_handler)
1305 ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn",
1306 bfd_get_filename (info->abfd), info->sec->name,
1307 (unsigned long) irel->r_offset));
1311 /* So we aren't told much. Do what we can with the address load and
1312 fake the rest. All of the optimizations here require that the
1313 offset from the GP fit in 16 bits. */
1315 disp = symval - info->gp;
1316 if (disp < -0x8000 || disp >= 0x8000)
1319 /* On the LITERAL instruction itself, consider exchanging
1320 `ldq R,X(gp)' for `lda R,Y(gp)'. */
1322 insn = (OP_LDA << 26) | (insn & 0x03ff0000);
1323 bfd_put_32 (info->abfd, insn, info->contents + irel->r_offset);
1324 info->changed_contents = true;
1326 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), R_ALPHA_GPRELLOW);
1327 info->changed_relocs = true;
1329 /* Reduce the use count on this got entry by one, possibly
1331 info->gotent->use_count -= 1;
1332 alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1;
1334 alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1;
1336 /* ??? Search forward through this basic block looking for insns
1337 that use the target register. Stop after an insn modifying the
1338 register is seen, or after a branch or call.
1340 Any such memory load insn may be substituted by a load directly
1341 off the GP. This allows the memory load insn to be issued before
1342 the calculated GP register would otherwise be ready.
1344 Any such jsr insn can be replaced by a bsr if it is in range.
1346 This would mean that we'd have to _add_ relocations, the pain of
1347 which gives one pause. */
1353 elf64_alpha_relax_section (abfd, sec, link_info, again)
1356 struct bfd_link_info *link_info;
1359 Elf_Internal_Shdr *symtab_hdr;
1360 Elf_Internal_Rela *internal_relocs;
1361 Elf_Internal_Rela *free_relocs = NULL;
1362 Elf_Internal_Rela *irel, *irelend;
1363 bfd_byte *free_contents = NULL;
1364 Elf64_External_Sym *extsyms = NULL;
1365 Elf64_External_Sym *free_extsyms = NULL;
1366 struct alpha_elf_got_entry **local_got_entries;
1367 struct alpha_relax_info info;
1369 /* We are not currently changing any sizes, so only one pass. */
1372 if (link_info->relocateable
1373 || (sec->flags & SEC_RELOC) == 0
1374 || sec->reloc_count == 0)
1377 /* If this is the first time we have been called for this section,
1378 initialize the cooked size. */
1379 if (sec->_cooked_size == 0)
1380 sec->_cooked_size = sec->_raw_size;
1382 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1383 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
1385 /* Load the relocations for this section. */
1386 internal_relocs = (_bfd_elf64_link_read_relocs
1387 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
1388 link_info->keep_memory));
1389 if (internal_relocs == NULL)
1391 if (! link_info->keep_memory)
1392 free_relocs = internal_relocs;
1394 memset(&info, 0, sizeof(info));
1397 info.link_info = link_info;
1398 info.relocs = internal_relocs;
1399 info.relend = irelend = internal_relocs + sec->reloc_count;
1401 /* Find the GP for this object. */
1402 info.gotobj = alpha_elf_tdata (abfd)->gotobj;
1405 asection *sgot = alpha_elf_tdata (info.gotobj)->got;
1406 info.gp = _bfd_get_gp_value (info.gotobj);
1409 info.gp = (sgot->output_section->vma
1410 + sgot->output_offset
1412 _bfd_set_gp_value (info.gotobj, info.gp);
1416 for (irel = internal_relocs; irel < irelend; irel++)
1421 if (ELF64_R_TYPE (irel->r_info) != (int) R_ALPHA_LITERAL)
1424 /* Get the section contents. */
1425 if (info.contents == NULL)
1427 if (elf_section_data (sec)->this_hdr.contents != NULL)
1428 info.contents = elf_section_data (sec)->this_hdr.contents;
1431 info.contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
1432 if (info.contents == NULL)
1434 free_contents = info.contents;
1436 if (! bfd_get_section_contents (abfd, sec, info.contents,
1437 (file_ptr) 0, sec->_raw_size))
1442 /* Read this BFD's symbols if we haven't done so already. */
1443 if (extsyms == NULL)
1445 if (symtab_hdr->contents != NULL)
1446 extsyms = (Elf64_External_Sym *) symtab_hdr->contents;
1449 extsyms = ((Elf64_External_Sym *)
1450 bfd_malloc (symtab_hdr->sh_size));
1451 if (extsyms == NULL)
1453 free_extsyms = extsyms;
1454 if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
1455 || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
1456 != symtab_hdr->sh_size))
1461 /* Get the value of the symbol referred to by the reloc. */
1462 if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1464 Elf_Internal_Sym isym;
1466 /* A local symbol. */
1467 bfd_elf64_swap_symbol_in (abfd,
1468 extsyms + ELF64_R_SYM (irel->r_info),
1472 info.gotent = local_got_entries[ELF64_R_SYM(irel->r_info)];
1473 symval = (isym.st_value
1474 + sec->output_section->vma
1475 + sec->output_offset);
1480 struct alpha_elf_link_hash_entry *h;
1481 struct alpha_elf_got_entry *gotent;
1483 indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1484 h = alpha_elf_sym_hashes (abfd)[indx];
1485 BFD_ASSERT (h != NULL);
1487 /* We can't do anthing with undefined or dynamic symbols. */
1488 if (h->root.root.type == bfd_link_hash_undefined
1489 || h->root.root.type == bfd_link_hash_undefweak
1490 || alpha_elf_dynamic_symbol_p (&h->root, link_info))
1493 /* Search for the got entry to be used by this relocation. */
1494 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
1495 if (gotent->gotobj == info.gotobj
1496 && gotent->addend == irel->r_addend)
1500 info.gotent = gotent;
1501 symval = (h->root.root.u.def.value
1502 + h->root.root.u.def.section->output_section->vma
1503 + h->root.root.u.def.section->output_offset);
1505 symval += irel->r_addend;
1507 BFD_ASSERT(info.gotent != NULL);
1509 /* If there exist LITUSE relocations immediately following, this
1510 opens up all sorts of interesting optimizations, because we
1511 now know every location that this address load is used. */
1513 if (irel+1 < irelend && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
1515 irel = elf64_alpha_relax_with_lituse (&info, symval, irel, irelend);
1521 if (!elf64_alpha_relax_without_lituse (&info, symval, irel))
1526 if (!elf64_alpha_size_got_sections (abfd, link_info))
1529 if (info.changed_relocs)
1531 elf_section_data (sec)->relocs = internal_relocs;
1533 else if (free_relocs != NULL)
1538 if (info.changed_contents)
1540 elf_section_data (sec)->this_hdr.contents = info.contents;
1542 else if (free_contents != NULL)
1544 if (! link_info->keep_memory)
1545 free (free_contents);
1548 /* Cache the section contents for elf_link_input_bfd. */
1549 elf_section_data (sec)->this_hdr.contents = info.contents;
1553 if (free_extsyms != NULL)
1555 if (! link_info->keep_memory)
1556 free (free_extsyms);
1559 /* Cache the symbols for elf_link_input_bfd. */
1560 symtab_hdr->contents = extsyms;
1567 if (free_relocs != NULL)
1569 if (free_contents != NULL)
1570 free (free_contents);
1571 if (free_extsyms != NULL)
1572 free (free_extsyms);
1577 #define PLT_HEADER_SIZE 32
1578 #define PLT_HEADER_WORD1 0xc3600000 /* br $27,.+4 */
1579 #define PLT_HEADER_WORD2 0xa77b000c /* ldq $27,12($27) */
1580 #define PLT_HEADER_WORD3 0x47ff041f /* nop */
1581 #define PLT_HEADER_WORD4 0x6b7b0000 /* jmp $27,($27) */
1583 #define PLT_ENTRY_SIZE 12
1584 #define PLT_ENTRY_WORD1 0xc3800000 /* br $28, plt0 */
1585 #define PLT_ENTRY_WORD2 0
1586 #define PLT_ENTRY_WORD3 0
1588 #define MAX_GOT_ENTRIES (64*1024 / 8)
1590 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
1592 /* Handle an Alpha specific section when reading an object file. This
1593 is called when elfcode.h finds a section with an unknown type.
1594 FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
1598 elf64_alpha_section_from_shdr (abfd, hdr, name)
1600 Elf64_Internal_Shdr *hdr;
1605 /* There ought to be a place to keep ELF backend specific flags, but
1606 at the moment there isn't one. We just keep track of the
1607 sections by their name, instead. Fortunately, the ABI gives
1608 suggested names for all the MIPS specific sections, so we will
1609 probably get away with this. */
1610 switch (hdr->sh_type)
1612 case SHT_ALPHA_DEBUG:
1613 if (strcmp (name, ".mdebug") != 0)
1616 #ifdef ERIC_neverdef
1617 case SHT_ALPHA_REGINFO:
1618 if (strcmp (name, ".reginfo") != 0
1619 || hdr->sh_size != sizeof (Elf64_External_RegInfo))
1627 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
1629 newsect = hdr->bfd_section;
1631 if (hdr->sh_type == SHT_ALPHA_DEBUG)
1633 if (! bfd_set_section_flags (abfd, newsect,
1634 (bfd_get_section_flags (abfd, newsect)
1639 #ifdef ERIC_neverdef
1640 /* For a .reginfo section, set the gp value in the tdata information
1641 from the contents of this section. We need the gp value while
1642 processing relocs, so we just get it now. */
1643 if (hdr->sh_type == SHT_ALPHA_REGINFO)
1645 Elf64_External_RegInfo ext;
1648 if (! bfd_get_section_contents (abfd, newsect, (PTR) &ext,
1649 (file_ptr) 0, sizeof ext))
1651 bfd_alpha_elf64_swap_reginfo_in (abfd, &ext, &s);
1652 elf_gp (abfd) = s.ri_gp_value;
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 #ifdef ERIC_neverdef
1683 else if (strcmp (name, ".reginfo") == 0)
1685 hdr->sh_type = SHT_ALPHA_REGINFO;
1686 /* In a shared object on Irix 5.3, the .reginfo section has an
1687 entsize of 0x18. FIXME: Does this matter? */
1688 if ((abfd->flags & DYNAMIC) != 0)
1689 hdr->sh_entsize = sizeof (Elf64_External_RegInfo);
1691 hdr->sh_entsize = 1;
1693 /* Force the section size to the correct value, even if the
1694 linker thinks it is larger. The link routine below will only
1695 write out this much data for .reginfo. */
1696 hdr->sh_size = sec->_raw_size = sizeof (Elf64_External_RegInfo);
1698 else if (strcmp (name, ".hash") == 0
1699 || strcmp (name, ".dynamic") == 0
1700 || strcmp (name, ".dynstr") == 0)
1702 hdr->sh_entsize = 0;
1703 hdr->sh_info = SIZEOF_ALPHA_DYNSYM_SECNAMES;
1706 else if (strcmp (name, ".sdata") == 0
1707 || strcmp (name, ".sbss") == 0
1708 || strcmp (name, ".lit4") == 0
1709 || strcmp (name, ".lit8") == 0)
1710 hdr->sh_flags |= SHF_ALPHA_GPREL;
1715 /* Hook called by the linker routine which adds symbols from an object
1716 file. We use it to put .comm items in .sbss, and not .bss. */
1719 elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1721 struct bfd_link_info *info;
1722 const Elf_Internal_Sym *sym;
1728 if (sym->st_shndx == SHN_COMMON
1729 && !info->relocateable
1730 && sym->st_size <= bfd_get_gp_size (abfd))
1732 /* Common symbols less than or equal to -G nn bytes are
1733 automatically put into .sbss. */
1735 asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
1739 scomm = bfd_make_section (abfd, ".scommon");
1741 || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC | SEC_LOAD
1743 | SEC_LINKER_CREATED)))
1747 if (bfd_get_section_alignment (abfd, scomm) < sym->st_value)
1749 if (!bfd_set_section_alignment (abfd, scomm, sym->st_value))
1754 *valp = sym->st_size;
1760 /* Return the number of additional phdrs we will need. */
1763 elf64_alpha_additional_program_headers (abfd)
1771 s = bfd_get_section_by_name (abfd, ".reginfo");
1772 if (s != NULL && (s->flags & SEC_LOAD) != 0)
1774 /* We need a PT_ALPHA_REGINFO segment. */
1778 if (bfd_get_section_by_name (abfd, ".dynamic") != NULL
1779 && bfd_get_section_by_name (abfd, ".mdebug") != NULL)
1781 /* We need a PT_ALPHA_RTPROC segment. */
1788 /* Create the .got section. */
1791 elf64_alpha_create_got_section(abfd, info)
1793 struct bfd_link_info *info;
1797 if (bfd_get_section_by_name (abfd, ".got"))
1800 s = bfd_make_section (abfd, ".got");
1802 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
1805 | SEC_LINKER_CREATED))
1806 || !bfd_set_section_alignment (abfd, s, 3))
1809 alpha_elf_tdata (abfd)->got = s;
1814 /* Create all the dynamic sections. */
1817 elf64_alpha_create_dynamic_sections (abfd, info)
1819 struct bfd_link_info *info;
1822 struct elf_link_hash_entry *h;
1824 /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
1826 s = bfd_make_section (abfd, ".plt");
1828 || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
1831 | SEC_LINKER_CREATED
1833 || ! bfd_set_section_alignment (abfd, s, 3))
1836 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
1839 if (! (_bfd_generic_link_add_one_symbol
1840 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
1841 (bfd_vma) 0, (const char *) NULL, false,
1842 get_elf_backend_data (abfd)->collect,
1843 (struct bfd_link_hash_entry **) &h)))
1845 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
1846 h->type = STT_OBJECT;
1849 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
1852 s = bfd_make_section (abfd, ".rela.plt");
1854 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
1857 | SEC_LINKER_CREATED
1859 || ! bfd_set_section_alignment (abfd, s, 3))
1862 /* We may or may not have created a .got section for this object, but
1863 we definitely havn't done the rest of the work. */
1865 if (!elf64_alpha_create_got_section (abfd, info))
1868 s = bfd_make_section(abfd, ".rela.got");
1870 || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
1873 | SEC_LINKER_CREATED
1875 || !bfd_set_section_alignment (abfd, s, 3))
1878 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
1879 dynobj's .got section. We don't do this in the linker script
1880 because we don't want to define the symbol if we are not creating
1881 a global offset table. */
1883 if (!(_bfd_generic_link_add_one_symbol
1884 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL,
1885 alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL,
1886 false, get_elf_backend_data (abfd)->collect,
1887 (struct bfd_link_hash_entry **) &h)))
1889 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
1890 h->type = STT_OBJECT;
1893 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
1896 elf_hash_table (info)->hgot = h;
1901 /* Read ECOFF debugging information from a .mdebug section into a
1902 ecoff_debug_info structure. */
1905 elf64_alpha_read_ecoff_info (abfd, section, debug)
1908 struct ecoff_debug_info *debug;
1911 const struct ecoff_debug_swap *swap;
1912 char *ext_hdr = NULL;
1914 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1916 ext_hdr = (char *) bfd_malloc ((size_t) swap->external_hdr_size);
1917 if (ext_hdr == NULL && swap->external_hdr_size != 0)
1920 if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
1921 swap->external_hdr_size)
1925 symhdr = &debug->symbolic_header;
1926 (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
1928 /* The symbolic header contains absolute file offsets and sizes to
1930 #define READ(ptr, offset, count, size, type) \
1931 if (symhdr->count == 0) \
1932 debug->ptr = NULL; \
1935 debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \
1936 if (debug->ptr == NULL) \
1937 goto error_return; \
1938 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
1939 || (bfd_read (debug->ptr, size, symhdr->count, \
1940 abfd) != size * symhdr->count)) \
1941 goto error_return; \
1944 READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
1945 READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
1946 READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
1947 READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
1948 READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
1949 READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
1951 READ (ss, cbSsOffset, issMax, sizeof (char), char *);
1952 READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
1953 READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
1954 READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
1955 READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
1959 debug->adjust = NULL;
1964 if (ext_hdr != NULL)
1966 if (debug->line != NULL)
1968 if (debug->external_dnr != NULL)
1969 free (debug->external_dnr);
1970 if (debug->external_pdr != NULL)
1971 free (debug->external_pdr);
1972 if (debug->external_sym != NULL)
1973 free (debug->external_sym);
1974 if (debug->external_opt != NULL)
1975 free (debug->external_opt);
1976 if (debug->external_aux != NULL)
1977 free (debug->external_aux);
1978 if (debug->ss != NULL)
1980 if (debug->ssext != NULL)
1981 free (debug->ssext);
1982 if (debug->external_fdr != NULL)
1983 free (debug->external_fdr);
1984 if (debug->external_rfd != NULL)
1985 free (debug->external_rfd);
1986 if (debug->external_ext != NULL)
1987 free (debug->external_ext);
1991 /* Alpha ELF local labels start with '$'. */
1994 elf64_alpha_is_local_label_name (abfd, name)
1998 return name[0] == '$';
2001 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
2002 routine in order to handle the ECOFF debugging information. We
2003 still call this mips_elf_find_line because of the slot
2004 find_line_info in elf_obj_tdata is declared that way. */
2006 struct mips_elf_find_line
2008 struct ecoff_debug_info d;
2009 struct ecoff_find_line i;
2013 elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
2014 functionname_ptr, line_ptr)
2019 const char **filename_ptr;
2020 const char **functionname_ptr;
2021 unsigned int *line_ptr;
2025 msec = bfd_get_section_by_name (abfd, ".mdebug");
2029 struct mips_elf_find_line *fi;
2030 const struct ecoff_debug_swap * const swap =
2031 get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
2033 /* If we are called during a link, alpha_elf_final_link may have
2034 cleared the SEC_HAS_CONTENTS field. We force it back on here
2035 if appropriate (which it normally will be). */
2036 origflags = msec->flags;
2037 if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
2038 msec->flags |= SEC_HAS_CONTENTS;
2040 fi = elf_tdata (abfd)->find_line_info;
2043 bfd_size_type external_fdr_size;
2046 struct fdr *fdr_ptr;
2048 fi = ((struct mips_elf_find_line *)
2049 bfd_zalloc (abfd, sizeof (struct mips_elf_find_line)));
2052 msec->flags = origflags;
2056 if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
2058 msec->flags = origflags;
2062 /* Swap in the FDR information. */
2063 fi->d.fdr = ((struct fdr *)
2065 (fi->d.symbolic_header.ifdMax *
2066 sizeof (struct fdr))));
2067 if (fi->d.fdr == NULL)
2069 msec->flags = origflags;
2072 external_fdr_size = swap->external_fdr_size;
2073 fdr_ptr = fi->d.fdr;
2074 fraw_src = (char *) fi->d.external_fdr;
2075 fraw_end = (fraw_src
2076 + fi->d.symbolic_header.ifdMax * external_fdr_size);
2077 for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
2078 (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
2080 elf_tdata (abfd)->find_line_info = fi;
2082 /* Note that we don't bother to ever free this information.
2083 find_nearest_line is either called all the time, as in
2084 objdump -l, so the information should be saved, or it is
2085 rarely called, as in ld error messages, so the memory
2086 wasted is unimportant. Still, it would probably be a
2087 good idea for free_cached_info to throw it away. */
2090 if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
2091 &fi->i, filename_ptr, functionname_ptr,
2094 msec->flags = origflags;
2098 msec->flags = origflags;
2101 /* Fall back on the generic ELF find_nearest_line routine. */
2103 return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
2104 filename_ptr, functionname_ptr,
2108 /* Structure used to pass information to alpha_elf_output_extsym. */
2113 struct bfd_link_info *info;
2114 struct ecoff_debug_info *debug;
2115 const struct ecoff_debug_swap *swap;
2120 elf64_alpha_output_extsym (h, data)
2121 struct alpha_elf_link_hash_entry *h;
2124 struct extsym_info *einfo = (struct extsym_info *) data;
2126 asection *sec, *output_section;
2128 if (h->root.indx == -2)
2130 else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2131 || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
2132 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
2133 && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
2135 else if (einfo->info->strip == strip_all
2136 || (einfo->info->strip == strip_some
2137 && bfd_hash_lookup (einfo->info->keep_hash,
2138 h->root.root.root.string,
2139 false, false) == NULL))
2147 if (h->esym.ifd == -2)
2150 h->esym.cobol_main = 0;
2151 h->esym.weakext = 0;
2152 h->esym.reserved = 0;
2153 h->esym.ifd = ifdNil;
2154 h->esym.asym.value = 0;
2155 h->esym.asym.st = stGlobal;
2157 if (h->root.root.type != bfd_link_hash_defined
2158 && h->root.root.type != bfd_link_hash_defweak)
2159 h->esym.asym.sc = scAbs;
2164 sec = h->root.root.u.def.section;
2165 output_section = sec->output_section;
2167 /* When making a shared library and symbol h is the one from
2168 the another shared library, OUTPUT_SECTION may be null. */
2169 if (output_section == NULL)
2170 h->esym.asym.sc = scUndefined;
2173 name = bfd_section_name (output_section->owner, output_section);
2175 if (strcmp (name, ".text") == 0)
2176 h->esym.asym.sc = scText;
2177 else if (strcmp (name, ".data") == 0)
2178 h->esym.asym.sc = scData;
2179 else if (strcmp (name, ".sdata") == 0)
2180 h->esym.asym.sc = scSData;
2181 else if (strcmp (name, ".rodata") == 0
2182 || strcmp (name, ".rdata") == 0)
2183 h->esym.asym.sc = scRData;
2184 else if (strcmp (name, ".bss") == 0)
2185 h->esym.asym.sc = scBss;
2186 else if (strcmp (name, ".sbss") == 0)
2187 h->esym.asym.sc = scSBss;
2188 else if (strcmp (name, ".init") == 0)
2189 h->esym.asym.sc = scInit;
2190 else if (strcmp (name, ".fini") == 0)
2191 h->esym.asym.sc = scFini;
2193 h->esym.asym.sc = scAbs;
2197 h->esym.asym.reserved = 0;
2198 h->esym.asym.index = indexNil;
2201 if (h->root.root.type == bfd_link_hash_common)
2202 h->esym.asym.value = h->root.root.u.c.size;
2203 else if (h->root.root.type == bfd_link_hash_defined
2204 || h->root.root.type == bfd_link_hash_defweak)
2206 if (h->esym.asym.sc == scCommon)
2207 h->esym.asym.sc = scBss;
2208 else if (h->esym.asym.sc == scSCommon)
2209 h->esym.asym.sc = scSBss;
2211 sec = h->root.root.u.def.section;
2212 output_section = sec->output_section;
2213 if (output_section != NULL)
2214 h->esym.asym.value = (h->root.root.u.def.value
2215 + sec->output_offset
2216 + output_section->vma);
2218 h->esym.asym.value = 0;
2220 else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2222 /* Set type and value for a symbol with a function stub. */
2223 h->esym.asym.st = stProc;
2224 sec = bfd_get_section_by_name (einfo->abfd, ".plt");
2226 h->esym.asym.value = 0;
2229 output_section = sec->output_section;
2230 if (output_section != NULL)
2231 h->esym.asym.value = (h->root.plt_offset
2232 + sec->output_offset
2233 + output_section->vma);
2235 h->esym.asym.value = 0;
2242 if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
2243 h->root.root.root.string,
2246 einfo->failed = true;
2253 /* FIXME: Create a runtime procedure table from the .mdebug section.
2256 mips_elf_create_procedure_table (handle, abfd, info, s, debug)
2259 struct bfd_link_info *info;
2261 struct ecoff_debug_info *debug;
2264 /* Handle dynamic relocations when doing an Alpha ELF link. */
2267 elf64_alpha_check_relocs (abfd, info, sec, relocs)
2269 struct bfd_link_info *info;
2271 const Elf_Internal_Rela *relocs;
2275 const char *rel_sec_name;
2276 Elf_Internal_Shdr *symtab_hdr;
2277 struct alpha_elf_link_hash_entry **sym_hashes;
2278 struct alpha_elf_got_entry **local_got_entries;
2279 const Elf_Internal_Rela *rel, *relend;
2282 if (info->relocateable)
2285 dynobj = elf_hash_table(info)->dynobj;
2287 elf_hash_table(info)->dynobj = dynobj = abfd;
2290 rel_sec_name = NULL;
2291 symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
2292 sym_hashes = alpha_elf_sym_hashes(abfd);
2293 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
2296 relend = relocs + sec->reloc_count;
2297 for (rel = relocs; rel < relend; ++rel)
2299 unsigned long r_symndx, r_type;
2300 struct alpha_elf_link_hash_entry *h;
2302 r_symndx = ELF64_R_SYM (rel->r_info);
2303 if (r_symndx < symtab_hdr->sh_info)
2307 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2309 while (h->root.root.type == bfd_link_hash_indirect
2310 || h->root.root.type == bfd_link_hash_warning)
2311 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2313 h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
2315 r_type = ELF64_R_TYPE (rel->r_info);
2319 case R_ALPHA_LITERAL:
2321 struct alpha_elf_got_entry *gotent;
2326 /* Search for and possibly create a got entry. */
2327 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
2328 if (gotent->gotobj == abfd &&
2329 gotent->addend == rel->r_addend)
2334 gotent = ((struct alpha_elf_got_entry *)
2336 sizeof (struct alpha_elf_got_entry)));
2340 gotent->gotobj = abfd;
2341 gotent->addend = rel->r_addend;
2342 gotent->got_offset = -1;
2344 gotent->use_count = 1;
2346 gotent->next = h->got_entries;
2347 h->got_entries = gotent;
2349 alpha_elf_tdata (abfd)->total_got_entries++;
2352 gotent->use_count += 1;
2356 /* This is a local .got entry -- record for merge. */
2357 if (!local_got_entries)
2360 size = (symtab_hdr->sh_info
2361 * sizeof (struct alpha_elf_got_entry *));
2363 local_got_entries = ((struct alpha_elf_got_entry **)
2364 bfd_alloc (abfd, size));
2365 if (!local_got_entries)
2368 memset (local_got_entries, 0, size);
2369 alpha_elf_tdata (abfd)->local_got_entries =
2373 for (gotent = local_got_entries[ELF64_R_SYM(rel->r_info)];
2374 gotent != NULL && gotent->addend != rel->r_addend;
2375 gotent = gotent->next)
2379 gotent = ((struct alpha_elf_got_entry *)
2381 sizeof (struct alpha_elf_got_entry)));
2385 gotent->gotobj = abfd;
2386 gotent->addend = rel->r_addend;
2387 gotent->got_offset = -1;
2389 gotent->use_count = 1;
2391 gotent->next = local_got_entries[ELF64_R_SYM(rel->r_info)];
2392 local_got_entries[ELF64_R_SYM(rel->r_info)] = gotent;
2394 alpha_elf_tdata(abfd)->total_got_entries++;
2395 alpha_elf_tdata(abfd)->n_local_got_entries++;
2398 gotent->use_count += 1;
2401 /* Remember how this literal is used from its LITUSEs.
2402 This will be important when it comes to decide if we can
2403 create a .plt entry for a function symbol. */
2405 && ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE)
2410 if (rel->r_addend >= 1 && rel->r_addend <= 3)
2411 flags |= 1 << rel->r_addend;
2413 while (rel+1 < relend &&
2414 ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE);
2418 /* No LITUSEs -- presumably the address is not being
2419 loaded for nothing. */
2420 flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
2423 gotent->flags |= flags;
2426 /* Make a guess as to whether a .plt entry will be needed. */
2427 if ((h->flags |= flags) == ALPHA_ELF_LINK_HASH_LU_FUNC)
2428 h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2430 h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2435 case R_ALPHA_GPDISP:
2436 case R_ALPHA_GPREL32:
2437 case R_ALPHA_GPRELHIGH:
2438 case R_ALPHA_GPRELLOW:
2439 /* We don't actually use the .got here, but the sections must
2440 be created before the linker maps input sections to output
2444 if (!elf64_alpha_create_got_section (abfd, info))
2447 /* Make sure the object's gotobj is set to itself so
2448 that we default to every object with its own .got.
2449 We'll merge .gots later once we've collected each
2451 alpha_elf_tdata(abfd)->gotobj = abfd;
2457 case R_ALPHA_SREL16:
2458 case R_ALPHA_SREL32:
2459 case R_ALPHA_SREL64:
2464 case R_ALPHA_REFLONG:
2465 case R_ALPHA_REFQUAD:
2466 if (rel_sec_name == NULL)
2468 rel_sec_name = (bfd_elf_string_from_elf_section
2469 (abfd, elf_elfheader(abfd)->e_shstrndx,
2470 elf_section_data(sec)->rel_hdr.sh_name));
2471 if (rel_sec_name == NULL)
2474 BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0
2475 && strcmp (bfd_get_section_name (abfd, sec),
2476 rel_sec_name+5) == 0);
2479 /* We need to create the section here now whether we eventually
2480 use it or not so that it gets mapped to an output section by
2481 the linker. If not used, we'll kill it in
2482 size_dynamic_sections. */
2485 sreloc = bfd_get_section_by_name (dynobj, rel_sec_name);
2488 sreloc = bfd_make_section (dynobj, rel_sec_name);
2490 || !bfd_set_section_flags (dynobj, sreloc,
2494 | SEC_LINKER_CREATED
2496 || !bfd_set_section_alignment (dynobj, sreloc, 3))
2503 /* Since we havn't seen all of the input symbols yet, we
2504 don't know whether we'll actually need a dynamic relocation
2505 entry for this reloc. So make a record of it. Once we
2506 find out if this thing needs dynamic relocation we'll
2507 expand the relocation sections by the appropriate amount. */
2509 struct alpha_elf_reloc_entry *rent;
2511 for (rent = h->reloc_entries; rent; rent = rent->next)
2512 if (rent->rtype == r_type && rent->srel == sreloc)
2517 rent = ((struct alpha_elf_reloc_entry *)
2519 sizeof (struct alpha_elf_reloc_entry)));
2523 rent->srel = sreloc;
2524 rent->rtype = r_type;
2527 rent->next = h->reloc_entries;
2528 h->reloc_entries = rent;
2533 else if (info->shared)
2535 /* If this is a shared library, we need a RELATIVE reloc. */
2536 sreloc->_raw_size += sizeof (Elf64_External_Rela);
2545 /* Adjust a symbol defined by a dynamic object and referenced by a
2546 regular object. The current definition is in some section of the
2547 dynamic object, but we're not including those sections. We have to
2548 change the definition to something the rest of the link can
2552 elf64_alpha_adjust_dynamic_symbol (info, h)
2553 struct bfd_link_info *info;
2554 struct elf_link_hash_entry *h;
2558 struct alpha_elf_link_hash_entry *ah;
2560 dynobj = elf_hash_table(info)->dynobj;
2561 ah = (struct alpha_elf_link_hash_entry *)h;
2563 /* Now that we've seen all of the input symbols, finalize our decision
2564 about whether this symbol should get a .plt entry. */
2566 if (h->root.type != bfd_link_hash_undefweak
2567 && alpha_elf_dynamic_symbol_p (h, info)
2568 && ((h->type == STT_FUNC
2569 && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR))
2570 || (h->type == STT_NOTYPE
2571 && ah->flags == ALPHA_ELF_LINK_HASH_LU_FUNC))
2572 /* Don't prevent otherwise valid programs from linking by attempting
2573 to create a new .got entry somewhere. A Correct Solution would be
2574 to add a new .got section to a new object file and let it be merged
2575 somewhere later. But for now don't bother. */
2578 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2580 s = bfd_get_section_by_name(dynobj, ".plt");
2581 if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
2584 /* The first bit of the .plt is reserved. */
2585 if (s->_raw_size == 0)
2586 s->_raw_size = PLT_HEADER_SIZE;
2588 h->plt_offset = s->_raw_size;
2589 s->_raw_size += PLT_ENTRY_SIZE;
2591 /* If this symbol is not defined in a regular file, and we are not
2592 generating a shared library, then set the symbol to the location
2593 in the .plt. This is required to make function pointers compare
2594 equal between the normal executable and the shared library. */
2597 h->root.u.def.section = s;
2598 h->root.u.def.value = h->plt_offset;
2601 /* We also need a JMP_SLOT entry in the .rela.plt section. */
2602 s = bfd_get_section_by_name (dynobj, ".rela.plt");
2603 BFD_ASSERT (s != NULL);
2604 s->_raw_size += sizeof (Elf64_External_Rela);
2609 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2611 /* If this is a weak symbol, and there is a real definition, the
2612 processor independent code will have arranged for us to see the
2613 real definition first, and we can just use the same value. */
2614 if (h->weakdef != NULL)
2616 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
2617 || h->weakdef->root.type == bfd_link_hash_defweak);
2618 h->root.u.def.section = h->weakdef->root.u.def.section;
2619 h->root.u.def.value = h->weakdef->root.u.def.value;
2623 /* This is a reference to a symbol defined by a dynamic object which
2624 is not a function. The Alpha, since it uses .got entries for all
2625 symbols even in regular objects, does not need the hackery of a
2626 .dynbss section and COPY dynamic relocations. */
2631 /* Symbol versioning can create new symbols, and make our old symbols
2632 indirect to the new ones. Consolidate the got and reloc information
2633 in these situations. */
2636 elf64_alpha_merge_ind_symbols (hi, dummy)
2637 struct alpha_elf_link_hash_entry *hi;
2640 struct alpha_elf_link_hash_entry *hs;
2642 if (hi->root.root.type != bfd_link_hash_indirect)
2646 hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link;
2647 } while (hs->root.root.type == bfd_link_hash_indirect);
2649 /* Merge the flags. Whee. */
2651 hs->flags |= hi->flags;
2653 /* Merge the .got entries. Cannibalize the old symbol's list in
2654 doing so, since we don't need it anymore. */
2656 if (hs->got_entries == NULL)
2657 hs->got_entries = hi->got_entries;
2660 struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
2662 gsh = hs->got_entries;
2663 for (gi = hi->got_entries; gi ; gi = gin)
2666 for (gs = gsh; gs ; gs = gs->next)
2667 if (gi->gotobj == gs->gotobj && gi->addend == gs->addend)
2669 gi->next = hs->got_entries;
2670 hs->got_entries = gi;
2674 hi->got_entries = NULL;
2676 /* And similar for the reloc entries. */
2678 if (hs->reloc_entries == NULL)
2679 hs->reloc_entries = hi->reloc_entries;
2682 struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
2684 rsh = hs->reloc_entries;
2685 for (ri = hi->reloc_entries; ri ; ri = rin)
2688 for (rs = rsh; rs ; rs = rs->next)
2689 if (ri->rtype == rs->rtype)
2691 rs->count += ri->count;
2694 ri->next = hs->reloc_entries;
2695 hs->reloc_entries = ri;
2699 hi->reloc_entries = NULL;
2704 /* Is it possible to merge two object file's .got tables? */
2707 elf64_alpha_can_merge_gots (a, b)
2710 int total = alpha_elf_tdata (a)->total_got_entries;
2712 /* Trivial quick fallout test. */
2713 if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES)
2716 /* By their nature, local .got entries cannot be merged. */
2717 if ((total += alpha_elf_tdata (b)->n_local_got_entries) > MAX_GOT_ENTRIES)
2720 /* Failing the common trivial comparison, we must effectively
2721 perform the merge. Not actually performing the merge means that
2722 we don't have to store undo information in case we fail. */
2724 struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b);
2725 Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr;
2728 n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
2729 for (i = 0; i < n; ++i)
2731 struct alpha_elf_got_entry *ae, *be;
2732 struct alpha_elf_link_hash_entry *h;
2735 while (h->root.root.type == bfd_link_hash_indirect
2736 || h->root.root.type == bfd_link_hash_warning)
2737 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2739 for (be = h->got_entries; be ; be = be->next)
2741 if (be->use_count == 0)
2743 if (be->gotobj != b)
2746 for (ae = h->got_entries; ae ; ae = ae->next)
2747 if (ae->gotobj == a && ae->addend == be->addend)
2750 if (++total > MAX_GOT_ENTRIES)
2760 /* Actually merge two .got tables. */
2763 elf64_alpha_merge_gots (a, b)
2766 int total = alpha_elf_tdata(a)->total_got_entries;
2768 /* Remember local expansion. */
2770 int e = alpha_elf_tdata(b)->n_local_got_entries;
2772 alpha_elf_tdata(a)->n_local_got_entries += e;
2775 /* Let the local .got entries know they are part of a new subsegment. */
2777 struct alpha_elf_got_entry **local_got_entries;
2778 local_got_entries = alpha_elf_tdata(b)->local_got_entries;
2779 if (local_got_entries)
2783 n = elf_tdata(b)->symtab_hdr.sh_info;
2784 for (i = 0; i < n; ++i)
2786 struct alpha_elf_got_entry *gotent;
2787 for (gotent = local_got_entries[i]; gotent; gotent = gotent->next)
2793 /* Merge the global .got entries. */
2795 struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b);
2796 Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr;
2799 n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
2800 for (i = 0; i < n; ++i)
2802 struct alpha_elf_got_entry *ae, *be, **pbe, **start;
2803 struct alpha_elf_link_hash_entry *h;
2806 while (h->root.root.type == bfd_link_hash_indirect
2807 || h->root.root.type == bfd_link_hash_warning)
2808 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2810 start = &h->got_entries;
2811 for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
2813 if (be->use_count == 0)
2818 if (be->gotobj != b)
2821 for (ae = *start; ae ; ae = ae->next)
2822 if (ae->gotobj == a && ae->addend == be->addend)
2824 ae->flags |= be->flags;
2836 alpha_elf_tdata(a)->total_got_entries = total;
2837 alpha_elf_tdata(b)->gotobj = a;
2840 /* Calculate the offsets for the got entries. */
2843 elf64_alpha_calc_got_offsets_for_symbol (h, arg)
2844 struct alpha_elf_link_hash_entry *h;
2847 struct alpha_elf_got_entry *gotent;
2849 for (gotent = h->got_entries; gotent; gotent = gotent->next)
2850 if (gotent->use_count > 0)
2853 = &alpha_elf_tdata (gotent->gotobj)->got->_raw_size;
2855 gotent->got_offset = *plge;
2863 elf64_alpha_calc_got_offsets (info)
2864 struct bfd_link_info *info;
2866 bfd *i, *got_list = alpha_elf_hash_table(info)->got_list;
2868 /* First, zero out the .got sizes, as we may be recalculating the
2869 .got after optimizing it. */
2870 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
2871 alpha_elf_tdata(i)->got->_raw_size = 0;
2873 /* Next, fill in the offsets for all the global entries. */
2874 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
2875 elf64_alpha_calc_got_offsets_for_symbol,
2878 /* Finally, fill in the offsets for the local entries. */
2879 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
2881 bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size;
2884 for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
2886 struct alpha_elf_got_entry **local_got_entries, *gotent;
2889 local_got_entries = alpha_elf_tdata(j)->local_got_entries;
2890 if (!local_got_entries)
2893 for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
2894 for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
2896 gotent->got_offset = got_offset;
2901 alpha_elf_tdata(i)->got->_raw_size = got_offset;
2905 /* Remove a section from the output BFD. */
2908 elf64_alpha_strip_section_from_output (s)
2913 for (spp = &s->output_section->owner->sections;
2914 *spp != s->output_section;
2915 spp = &(*spp)->next)
2917 *spp = s->output_section->next;
2918 --s->output_section->owner->section_count;
2921 /* Constructs the gots. */
2924 elf64_alpha_size_got_sections (output_bfd, info)
2926 struct bfd_link_info *info;
2928 bfd *i, *got_list, *cur_got_obj, **cur_got_tail;
2934 cur_got_tail = NULL;
2935 for (i = info->input_bfds; i ; i = i->link_next)
2937 bfd *this_got = alpha_elf_tdata (i)->gotobj;
2939 /* Don't play if there is no .got for this input file. */
2940 if (this_got == NULL)
2943 if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES)
2945 /* Yikes! A single object file has too many entries. */
2946 (*_bfd_error_handler)
2947 (_("%s: .got subsegment exceeds 64K (size %d)"),
2948 bfd_get_filename(i),
2949 alpha_elf_tdata(this_got)->total_got_entries * 8);
2955 if (this_got == cur_got_obj)
2956 ; /* Some previous pass merged us already. */
2957 else if (elf64_alpha_can_merge_gots (cur_got_obj, i))
2959 elf64_alpha_merge_gots (cur_got_obj, i);
2966 (*info->callbacks->warning)
2967 (info, _("using multiple gp values"), (char *) NULL,
2968 output_bfd, (asection *) NULL, (bfd_vma) 0);
2970 *cur_got_tail = NULL;
2971 alpha_elf_tdata(cur_got_obj)->got_link_next = got_list;
2972 got_list = cur_got_obj;
2981 cur_got_tail = &alpha_elf_tdata(i)->in_got_link_next;
2985 alpha_elf_tdata (cur_got_obj)->got_link_next = got_list;
2986 alpha_elf_hash_table (info)->got_list = cur_got_obj;
2988 /* Once the gots have been merged, fill in the got offsets for everything
2990 elf64_alpha_calc_got_offsets (info);
2996 elf64_alpha_always_size_sections (output_bfd, info)
2998 struct bfd_link_info *info;
3002 if (info->relocateable)
3005 /* First, take care of the indirect symbols created by versioning. */
3006 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3007 elf64_alpha_merge_ind_symbols,
3010 if (!elf64_alpha_size_got_sections (output_bfd, info))
3013 /* Allocate space for all of the .got subsections. */
3014 i = alpha_elf_hash_table (info)->got_list;
3015 for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
3017 asection *s = alpha_elf_tdata(i)->got;
3018 if (s->_raw_size > 0)
3020 s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size);
3021 if (s->contents == NULL)
3029 /* Work out the sizes of the dynamic relocation entries. */
3032 elf64_alpha_calc_dynrel_sizes (h, info)
3033 struct alpha_elf_link_hash_entry *h;
3034 struct bfd_link_info *info;
3036 /* If the symbol was defined as a common symbol in a regular object
3037 file, and there was no definition in any dynamic object, then the
3038 linker will have allocated space for the symbol in a common
3039 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
3040 set. This is done for dynamic symbols in
3041 elf_adjust_dynamic_symbol but this is not done for non-dynamic
3042 symbols, somehow. */
3043 if (((h->root.elf_link_hash_flags
3044 & (ELF_LINK_HASH_DEF_REGULAR
3045 | ELF_LINK_HASH_REF_REGULAR
3046 | ELF_LINK_HASH_DEF_DYNAMIC))
3047 == ELF_LINK_HASH_REF_REGULAR)
3048 && (h->root.root.type == bfd_link_hash_defined
3049 || h->root.root.type == bfd_link_hash_defweak)
3050 && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
3052 h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3055 /* If the symbol is dynamic, we'll need all the relocations in their
3056 natural form. If it has been forced local, we'll need the same
3057 number of RELATIVE relocations. */
3058 if (alpha_elf_dynamic_symbol_p (&h->root, info)
3059 || (info->shared && h->root.dynindx == -1))
3061 struct alpha_elf_reloc_entry *relent;
3063 for (relent = h->reloc_entries; relent; relent = relent->next)
3065 relent->srel->_raw_size +=
3066 sizeof (Elf64_External_Rela) * relent->count;
3069 /* Only add a .rela.got entry if we're not using a .plt entry. */
3070 if (h->root.plt_offset == MINUS_ONE)
3072 bfd *dynobj = elf_hash_table(info)->dynobj;
3073 struct alpha_elf_got_entry *gotent;
3074 bfd_size_type count = 0;
3077 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
3081 srel = bfd_get_section_by_name (dynobj, ".rela.got");
3082 BFD_ASSERT (srel != NULL);
3083 srel->_raw_size += sizeof (Elf64_External_Rela) * count;
3087 /* Otherwise, shared objects require RELATIVE relocs for all REFQUAD
3088 and REFLONG relocations. */
3089 else if (info->shared)
3091 struct alpha_elf_reloc_entry *relent;
3093 for (relent = h->reloc_entries; relent; relent = relent->next)
3094 if (relent->rtype == R_ALPHA_REFLONG
3095 || relent->rtype == R_ALPHA_REFQUAD)
3097 relent->srel->_raw_size +=
3098 sizeof(Elf64_External_Rela) * relent->count;
3105 /* Set the sizes of the dynamic sections. */
3108 elf64_alpha_size_dynamic_sections (output_bfd, info)
3110 struct bfd_link_info *info;
3117 dynobj = elf_hash_table(info)->dynobj;
3118 BFD_ASSERT(dynobj != NULL);
3120 if (elf_hash_table (info)->dynamic_sections_created)
3122 /* Set the contents of the .interp section to the interpreter. */
3125 s = bfd_get_section_by_name (dynobj, ".interp");
3126 BFD_ASSERT (s != NULL);
3127 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
3128 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3131 /* Now that we've seen all of the input files, we can decide which
3132 symbols need dynamic relocation entries and which don't. We've
3133 collected information in check_relocs that we can now apply to
3134 size the dynamic relocation sections. */
3135 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3136 elf64_alpha_calc_dynrel_sizes,
3139 /* When building shared libraries, each local .got entry needs a
3145 bfd_size_type count;
3147 srel = bfd_get_section_by_name (dynobj, ".rela.got");
3148 BFD_ASSERT (srel != NULL);
3150 for (i = alpha_elf_hash_table(info)->got_list, count = 0;
3152 i = alpha_elf_tdata(i)->got_link_next)
3153 count += alpha_elf_tdata(i)->n_local_got_entries;
3155 srel->_raw_size += count * sizeof(Elf64_External_Rela);
3158 /* else we're not dynamic and by definition we don't need such things. */
3160 /* The check_relocs and adjust_dynamic_symbol entry points have
3161 determined the sizes of the various dynamic sections. Allocate
3165 for (s = dynobj->sections; s != NULL; s = s->next)
3170 if (!(s->flags & SEC_LINKER_CREATED))
3173 /* It's OK to base decisions on the section name, because none
3174 of the dynobj section names depend upon the input files. */
3175 name = bfd_get_section_name (dynobj, s);
3177 /* If we don't need this section, strip it from the output file.
3178 This is to handle .rela.bss and .rela.plt. We must create it
3179 in create_dynamic_sections, because it must be created before
3180 the linker maps input sections to output sections. The
3181 linker does that before adjust_dynamic_symbol is called, and
3182 it is that function which decides whether anything needs to
3183 go into these sections. */
3187 if (strncmp (name, ".rela", 5) == 0)
3189 strip = (s->_raw_size == 0);
3193 const char *outname;
3196 /* If this relocation section applies to a read only
3197 section, then we probably need a DT_TEXTREL entry. */
3198 outname = bfd_get_section_name (output_bfd,
3200 target = bfd_get_section_by_name (output_bfd, outname + 5);
3202 && (target->flags & SEC_READONLY) != 0
3203 && (target->flags & SEC_ALLOC) != 0)
3206 if (strcmp(name, ".rela.plt") == 0)
3209 /* We use the reloc_count field as a counter if we need
3210 to copy relocs into the output file. */
3214 else if (strcmp (name, ".plt") != 0)
3216 /* It's not one of our dynamic sections, so don't allocate space. */
3221 elf64_alpha_strip_section_from_output (s);
3224 /* Allocate memory for the section contents. */
3225 s->contents = (bfd_byte *) bfd_zalloc(dynobj, s->_raw_size);
3226 if (s->contents == NULL && s->_raw_size != 0)
3231 /* If we are generating a shared library, we generate a section
3232 symbol for each output section. These are local symbols, which
3233 means that they must come first in the dynamic symbol table.
3234 That means we must increment the dynamic symbol index of every
3235 other dynamic symbol. */
3242 c[1] = bfd_count_sections (output_bfd);
3244 elf_hash_table (info)->dynsymcount += c[1];
3245 elf_link_hash_traverse (elf_hash_table(info),
3246 elf64_alpha_adjust_dynindx,
3249 for (i = 1, p = output_bfd->sections;
3253 elf_section_data (p)->dynindx = i;
3254 /* These symbols will have no names, so we don't need to
3255 fiddle with dynstr_index. */
3259 if (elf_hash_table (info)->dynamic_sections_created)
3261 /* Add some entries to the .dynamic section. We fill in the
3262 values later, in elf64_alpha_finish_dynamic_sections, but we
3263 must add the entries now so that we get the correct size for
3264 the .dynamic section. The DT_DEBUG entry is filled in by the
3265 dynamic linker and used by the debugger. */
3268 if (!bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0))
3272 if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0))
3277 if (! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0)
3278 || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
3279 || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0))
3283 if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0)
3284 || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0)
3285 || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT,
3286 sizeof(Elf64_External_Rela)))
3291 if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0))
3299 /* Increment the index of a dynamic symbol by a given amount. Called
3300 via elf_link_hash_traverse. */
3303 elf64_alpha_adjust_dynindx (h, cparg)
3304 struct elf_link_hash_entry *h;
3307 long *cp = (long *)cparg;
3309 if (h->dynindx >= cp[0])
3310 h->dynindx += cp[1];
3315 /* Relocate an Alpha ELF section. */
3318 elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
3319 contents, relocs, local_syms, local_sections)
3321 struct bfd_link_info *info;
3323 asection *input_section;
3325 Elf_Internal_Rela *relocs;
3326 Elf_Internal_Sym *local_syms;
3327 asection **local_sections;
3329 Elf_Internal_Shdr *symtab_hdr;
3330 Elf_Internal_Rela *rel;
3331 Elf_Internal_Rela *relend;
3332 asection *sec, *sgot, *srel, *srelgot;
3333 bfd *dynobj, *gotobj;
3336 srelgot = srel = NULL;
3337 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3338 dynobj = elf_hash_table (info)->dynobj;
3341 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3344 /* Find the gp value for this input bfd. */
3347 gotobj = alpha_elf_tdata (input_bfd)->gotobj;
3350 sgot = alpha_elf_tdata (gotobj)->got;
3351 gp = _bfd_get_gp_value (gotobj);
3354 gp = (sgot->output_section->vma
3355 + sgot->output_offset
3357 _bfd_set_gp_value (gotobj, gp);
3362 relend = relocs + input_section->reloc_count;
3363 for (; rel < relend; rel++)
3366 reloc_howto_type *howto;
3367 unsigned long r_symndx;
3368 struct alpha_elf_link_hash_entry *h;
3369 Elf_Internal_Sym *sym;
3372 bfd_reloc_status_type r;
3374 r_type = ELF64_R_TYPE(rel->r_info);
3375 if (r_type < 0 || r_type >= (int) R_ALPHA_max)
3377 bfd_set_error (bfd_error_bad_value);
3380 howto = elf64_alpha_howto_table + r_type;
3382 r_symndx = ELF64_R_SYM(rel->r_info);
3384 if (info->relocateable)
3386 /* This is a relocateable link. We don't have to change
3387 anything, unless the reloc is against a section symbol,
3388 in which case we have to adjust according to where the
3389 section symbol winds up in the output section. */
3390 if (r_symndx < symtab_hdr->sh_info)
3392 sym = local_syms + r_symndx;
3393 if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
3395 sec = local_sections[r_symndx];
3396 rel->r_addend += sec->output_offset + sym->st_value;
3403 /* This is a final link. */
3409 if (r_symndx < symtab_hdr->sh_info)
3411 sym = local_syms + r_symndx;
3412 sec = local_sections[r_symndx];
3413 relocation = (sec->output_section->vma
3414 + sec->output_offset
3419 h = alpha_elf_sym_hashes (input_bfd)[r_symndx - symtab_hdr->sh_info];
3421 while (h->root.root.type == bfd_link_hash_indirect
3422 || h->root.root.type == bfd_link_hash_warning)
3423 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3425 if (h->root.root.type == bfd_link_hash_defined
3426 || h->root.root.type == bfd_link_hash_defweak)
3428 sec = h->root.root.u.def.section;
3431 if ((r_type == R_ALPHA_LITERAL
3432 && elf_hash_table(info)->dynamic_sections_created
3435 || !(h->root.elf_link_hash_flags
3436 & ELF_LINK_HASH_DEF_REGULAR)))
3439 || !(h->root.elf_link_hash_flags
3440 & ELF_LINK_HASH_DEF_REGULAR))
3441 && (input_section->flags & SEC_ALLOC)
3442 && (r_type == R_ALPHA_REFLONG
3443 || r_type == R_ALPHA_REFQUAD
3444 || r_type == R_ALPHA_LITERAL)))
3446 /* In these cases, we don't need the relocation value.
3447 We check specially because in some obscure cases
3448 sec->output_section will be NULL. */
3452 /* FIXME: Are not these obscure cases simply bugs? Let's
3453 get something working and come back to this. */
3454 if (sec->output_section == NULL)
3456 #endif /* rth_notdef */
3459 relocation = (h->root.root.u.def.value
3460 + sec->output_section->vma
3461 + sec->output_offset);
3464 else if (h->root.root.type == bfd_link_hash_undefweak)
3466 else if (info->shared && !info->symbolic)
3470 if (!((*info->callbacks->undefined_symbol)
3471 (info, h->root.root.root.string, input_bfd,
3472 input_section, rel->r_offset)))
3477 addend = rel->r_addend;
3481 case R_ALPHA_GPDISP:
3483 bfd_byte *p_ldah, *p_lda;
3485 BFD_ASSERT(gp != 0);
3487 relocation = (input_section->output_section->vma
3488 + input_section->output_offset
3491 p_ldah = contents + rel->r_offset - input_section->vma;
3492 p_lda = p_ldah + rel->r_addend;
3494 r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - relocation,
3499 case R_ALPHA_OP_PUSH:
3500 case R_ALPHA_OP_STORE:
3501 case R_ALPHA_OP_PSUB:
3502 case R_ALPHA_OP_PRSHIFT:
3503 /* We hate these silly beasts. */
3506 case R_ALPHA_LITERAL:
3508 struct alpha_elf_got_entry *gotent;
3510 BFD_ASSERT(sgot != NULL);
3511 BFD_ASSERT(gp != 0);
3515 gotent = h->got_entries;
3516 BFD_ASSERT(gotent != NULL);
3518 while (gotent->gotobj != gotobj || gotent->addend != addend)
3519 gotent = gotent->next;
3521 /* Initialize the .got entry's value. */
3522 if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE))
3524 bfd_put_64 (output_bfd, relocation+addend,
3525 sgot->contents + gotent->got_offset);
3527 /* If the symbol has been forced local, output a
3528 RELATIVE reloc, otherwise it will be handled in
3529 finish_dynamic_symbol. */
3530 if (info->shared && h->root.dynindx == -1)
3532 Elf_Internal_Rela outrel;
3534 BFD_ASSERT(srelgot != NULL);
3536 outrel.r_offset = (sgot->output_section->vma
3537 + sgot->output_offset
3538 + gotent->got_offset);
3539 outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
3540 outrel.r_addend = 0;
3542 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3543 ((Elf64_External_Rela *)
3545 + srelgot->reloc_count++);
3548 gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE;
3553 gotent = (alpha_elf_tdata(input_bfd)->
3554 local_got_entries[r_symndx]);
3555 while (gotent->addend != addend)
3556 gotent = gotent->next;
3558 if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE))
3560 bfd_put_64 (output_bfd, relocation+addend,
3561 sgot->contents + gotent->got_offset);
3563 /* Local got entries need RELATIVE relocs in shared
3567 Elf_Internal_Rela outrel;
3569 BFD_ASSERT(srelgot != NULL);
3571 outrel.r_offset = (sgot->output_section->vma
3572 + sgot->output_offset
3573 + gotent->got_offset);
3574 outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
3575 outrel.r_addend = 0;
3577 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3578 ((Elf64_External_Rela *)
3580 + srelgot->reloc_count++);
3583 gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE;
3587 /* Figure the gprel relocation. */
3589 relocation = (sgot->output_section->vma
3590 + sgot->output_offset
3591 + gotent->got_offset);
3594 /* overflow handled by _bfd_final_link_relocate */
3597 case R_ALPHA_GPREL32:
3598 case R_ALPHA_GPRELLOW:
3599 BFD_ASSERT(gp != 0);
3603 case R_ALPHA_GPRELHIGH:
3604 BFD_ASSERT(gp != 0);
3606 relocation += addend;
3608 relocation = (((bfd_signed_vma) relocation >> 16)
3609 + ((relocation >> 15) & 1));
3612 case R_ALPHA_BRADDR:
3614 /* The regular PC-relative stuff measures from the start of
3615 the instruction rather than the end. */
3619 case R_ALPHA_REFLONG:
3620 case R_ALPHA_REFQUAD:
3622 Elf_Internal_Rela outrel;
3625 /* Careful here to remember RELATIVE relocations for global
3626 variables for symbolic shared objects. */
3628 if (h && alpha_elf_dynamic_symbol_p (&h->root, info))
3630 BFD_ASSERT(h->root.dynindx != -1);
3631 outrel.r_info = ELF64_R_INFO(h->root.dynindx, r_type);
3632 outrel.r_addend = addend;
3633 addend = 0, relocation = 0;
3635 else if (info->shared)
3637 outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE);
3638 outrel.r_addend = 0;
3647 name = (bfd_elf_string_from_elf_section
3648 (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
3649 elf_section_data(input_section)->rel_hdr.sh_name));
3650 BFD_ASSERT(name != NULL);
3652 srel = bfd_get_section_by_name (dynobj, name);
3653 BFD_ASSERT(srel != NULL);
3658 if (elf_section_data (input_section)->stab_info == NULL)
3659 outrel.r_offset = rel->r_offset;
3664 off = (_bfd_stab_section_offset
3665 (output_bfd, &elf_hash_table (info)->stab_info,
3667 &elf_section_data (input_section)->stab_info,
3669 if (off == (bfd_vma) -1)
3671 outrel.r_offset = off;
3675 outrel.r_offset += (input_section->output_section->vma
3676 + input_section->output_offset);
3678 memset (&outrel, 0, sizeof outrel);
3680 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3681 ((Elf64_External_Rela *)
3683 + srel->reloc_count++);
3689 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3690 contents, rel->r_offset, relocation,
3700 case bfd_reloc_overflow:
3705 name = h->root.root.root.string;
3708 name = (bfd_elf_string_from_elf_section
3709 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3713 name = bfd_section_name (input_bfd, sec);
3715 if (! ((*info->callbacks->reloc_overflow)
3716 (info, name, howto->name, (bfd_vma) 0,
3717 input_bfd, input_section, rel->r_offset)))
3723 case bfd_reloc_outofrange:
3731 /* Finish up dynamic symbol handling. We set the contents of various
3732 dynamic sections here. */
3735 elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
3737 struct bfd_link_info *info;
3738 struct elf_link_hash_entry *h;
3739 Elf_Internal_Sym *sym;
3741 bfd *dynobj = elf_hash_table(info)->dynobj;
3743 if (h->plt_offset != MINUS_ONE)
3745 /* Fill in the .plt entry for this symbol. */
3746 asection *splt, *sgot, *srel;
3747 Elf_Internal_Rela outrel;
3748 bfd_vma got_addr, plt_addr;
3750 struct alpha_elf_got_entry *gotent;
3752 BFD_ASSERT (h->dynindx != -1);
3754 /* The first .got entry will be updated by the .plt with the
3755 address of the target function. */
3756 gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
3757 BFD_ASSERT (gotent && gotent->addend == 0);
3759 splt = bfd_get_section_by_name (dynobj, ".plt");
3760 BFD_ASSERT (splt != NULL);
3761 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
3762 BFD_ASSERT (srel != NULL);
3763 sgot = alpha_elf_tdata (gotent->gotobj)->got;
3764 BFD_ASSERT (sgot != NULL);
3766 got_addr = (sgot->output_section->vma
3767 + sgot->output_offset
3768 + gotent->got_offset);
3769 plt_addr = (splt->output_section->vma
3770 + splt->output_offset
3773 plt_index = (h->plt_offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
3775 /* Fill in the entry in the procedure linkage table. */
3777 unsigned insn1, insn2, insn3;
3779 insn1 = PLT_ENTRY_WORD1 | ((-(h->plt_offset + 4) >> 2) & 0x1fffff);
3780 insn2 = PLT_ENTRY_WORD2;
3781 insn3 = PLT_ENTRY_WORD3;
3783 bfd_put_32 (output_bfd, insn1, splt->contents + h->plt_offset);
3784 bfd_put_32 (output_bfd, insn2, splt->contents + h->plt_offset + 4);
3785 bfd_put_32 (output_bfd, insn3, splt->contents + h->plt_offset + 8);
3788 /* Fill in the entry in the .rela.plt section. */
3789 outrel.r_offset = got_addr;
3790 outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
3791 outrel.r_addend = 0;
3793 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3794 ((Elf64_External_Rela *)srel->contents
3797 if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3799 /* Mark the symbol as undefined, rather than as defined in the
3800 .plt section. Leave the value alone. */
3801 sym->st_shndx = SHN_UNDEF;
3804 /* Fill in the entries in the .got. */
3805 bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset);
3807 /* Subsequent .got entries will continue to bounce through the .plt. */
3808 while ((gotent = gotent->next) != NULL)
3810 sgot = alpha_elf_tdata(gotent->gotobj)->got;
3811 BFD_ASSERT(sgot != NULL);
3812 BFD_ASSERT(gotent->addend == 0);
3814 bfd_put_64 (output_bfd, plt_addr,
3815 sgot->contents + gotent->got_offset);
3818 else if (alpha_elf_dynamic_symbol_p (h, info))
3820 /* Fill in the dynamic relocations for this symbol's .got entries. */
3822 Elf_Internal_Rela outrel;
3823 struct alpha_elf_got_entry *gotent;
3825 srel = bfd_get_section_by_name (dynobj, ".rela.got");
3826 BFD_ASSERT (srel != NULL);
3828 outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_GLOB_DAT);
3829 for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
3831 gotent = gotent->next)
3833 asection *sgot = alpha_elf_tdata (gotent->gotobj)->got;
3834 outrel.r_offset = (sgot->output_section->vma
3835 + sgot->output_offset
3836 + gotent->got_offset);
3837 outrel.r_addend = gotent->addend;
3839 bfd_elf64_swap_reloca_out (output_bfd, &outrel,
3840 ((Elf64_External_Rela *)srel->contents
3841 + srel->reloc_count++));
3845 /* Mark some specially defined symbols as absolute. */
3846 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3847 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3848 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3849 sym->st_shndx = SHN_ABS;
3854 /* Finish up the dynamic sections. */
3857 elf64_alpha_finish_dynamic_sections (output_bfd, info)
3859 struct bfd_link_info *info;
3864 dynobj = elf_hash_table (info)->dynobj;
3865 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3867 if (elf_hash_table (info)->dynamic_sections_created)
3870 Elf64_External_Dyn *dyncon, *dynconend;
3872 splt = bfd_get_section_by_name (dynobj, ".plt");
3873 BFD_ASSERT (splt != NULL && sdyn != NULL);
3875 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3876 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3877 for (; dyncon < dynconend; dyncon++)
3879 Elf_Internal_Dyn dyn;
3883 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3898 /* My interpretation of the TIS v1.1 ELF document indicates
3899 that RELASZ should not include JMPREL. This is not what
3900 the rest of the BFD does. It is, however, what the
3901 glibc ld.so wants. Do this fixup here until we found
3902 out who is right. */
3903 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
3907 (s->_cooked_size ? s->_cooked_size : s->_raw_size);
3912 s = bfd_get_section_by_name (output_bfd, name);
3913 dyn.d_un.d_ptr = (s ? s->vma : 0);
3917 s = bfd_get_section_by_name (output_bfd, name);
3919 (s->_cooked_size ? s->_cooked_size : s->_raw_size);
3923 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3926 /* Initialize the PLT0 entry */
3927 if (splt->_raw_size > 0)
3929 bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents);
3930 bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4);
3931 bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8);
3932 bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12);
3934 /* The next two words will be filled in by ld.so */
3935 bfd_put_64 (output_bfd, 0, splt->contents + 16);
3936 bfd_put_64 (output_bfd, 0, splt->contents + 24);
3938 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
3947 Elf_Internal_Sym sym;
3949 /* Set up the section symbols for the output sections. */
3951 sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
3952 BFD_ASSERT (sdynsym != NULL);
3956 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
3959 for (s = output_bfd->sections; s != NULL; s = s->next)
3963 sym.st_value = s->vma;
3965 indx = elf_section_data (s)->this_idx;
3966 BFD_ASSERT (indx > 0);
3967 sym.st_shndx = indx;
3969 bfd_elf64_swap_symbol_out (output_bfd, &sym,
3970 (PTR) (((Elf64_External_Sym *)
3972 + elf_section_data (s)->dynindx));
3975 /* Set the sh_info field of the output .dynsym section to the
3976 index of the first global symbol. */
3977 elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
3978 bfd_count_sections (output_bfd) + 1;
3984 /* We need to use a special link routine to handle the .reginfo and
3985 the .mdebug sections. We need to merge all instances of these
3986 sections together, not write them all out sequentially. */
3989 elf64_alpha_final_link (abfd, info)
3991 struct bfd_link_info *info;
3994 struct bfd_link_order *p;
3995 asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec;
3996 struct ecoff_debug_info debug;
3997 const struct ecoff_debug_swap *swap
3998 = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
3999 HDRR *symhdr = &debug.symbolic_header;
4000 PTR mdebug_handle = NULL;
4002 /* Go through the sections and collect the .reginfo and .mdebug
4006 gptab_data_sec = NULL;
4007 gptab_bss_sec = NULL;
4008 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
4010 #ifdef ERIC_neverdef
4011 if (strcmp (o->name, ".reginfo") == 0)
4013 memset (®info, 0, sizeof reginfo);
4015 /* We have found the .reginfo section in the output file.
4016 Look through all the link_orders comprising it and merge
4017 the information together. */
4018 for (p = o->link_order_head;
4019 p != (struct bfd_link_order *) NULL;
4022 asection *input_section;
4024 Elf64_External_RegInfo ext;
4027 if (p->type != bfd_indirect_link_order)
4029 if (p->type == bfd_fill_link_order)
4034 input_section = p->u.indirect.section;
4035 input_bfd = input_section->owner;
4037 /* The linker emulation code has probably clobbered the
4038 size to be zero bytes. */
4039 if (input_section->_raw_size == 0)
4040 input_section->_raw_size = sizeof (Elf64_External_RegInfo);
4042 if (! bfd_get_section_contents (input_bfd, input_section,
4048 bfd_alpha_elf64_swap_reginfo_in (input_bfd, &ext, &sub);
4050 reginfo.ri_gprmask |= sub.ri_gprmask;
4051 reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
4052 reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
4053 reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
4054 reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
4056 /* ri_gp_value is set by the function
4057 alpha_elf_section_processing when the section is
4058 finally written out. */
4060 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4061 elf_link_input_bfd ignores this section. */
4062 input_section->flags &=~ SEC_HAS_CONTENTS;
4065 /* Force the section size to the value we want. */
4066 o->_raw_size = sizeof (Elf64_External_RegInfo);
4068 /* Skip this section later on (I don't think this currently
4069 matters, but someday it might). */
4070 o->link_order_head = (struct bfd_link_order *) NULL;
4076 if (strcmp (o->name, ".mdebug") == 0)
4078 struct extsym_info einfo;
4080 /* We have found the .mdebug section in the output file.
4081 Look through all the link_orders comprising it and merge
4082 the information together. */
4083 symhdr->magic = swap->sym_magic;
4084 /* FIXME: What should the version stamp be? */
4086 symhdr->ilineMax = 0;
4090 symhdr->isymMax = 0;
4091 symhdr->ioptMax = 0;
4092 symhdr->iauxMax = 0;
4094 symhdr->issExtMax = 0;
4097 symhdr->iextMax = 0;
4099 /* We accumulate the debugging information itself in the
4100 debug_info structure. */
4102 debug.external_dnr = NULL;
4103 debug.external_pdr = NULL;
4104 debug.external_sym = NULL;
4105 debug.external_opt = NULL;
4106 debug.external_aux = NULL;
4108 debug.ssext = debug.ssext_end = NULL;
4109 debug.external_fdr = NULL;
4110 debug.external_rfd = NULL;
4111 debug.external_ext = debug.external_ext_end = NULL;
4113 mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
4114 if (mdebug_handle == (PTR) NULL)
4123 static const char * const name[] =
4125 ".text", ".init", ".fini", ".data",
4126 ".rodata", ".sdata", ".sbss", ".bss"
4128 static const int sc[] = { scText, scInit, scFini, scData,
4129 scRData, scSData, scSBss, scBss };
4132 esym.cobol_main = 0;
4136 esym.asym.iss = issNil;
4137 esym.asym.st = stLocal;
4138 esym.asym.reserved = 0;
4139 esym.asym.index = indexNil;
4140 for (i = 0; i < 8; i++)
4142 esym.asym.sc = sc[i];
4143 s = bfd_get_section_by_name (abfd, name[i]);
4146 esym.asym.value = s->vma;
4147 last = s->vma + s->_raw_size;
4150 esym.asym.value = last;
4152 if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
4158 for (p = o->link_order_head;
4159 p != (struct bfd_link_order *) NULL;
4162 asection *input_section;
4164 const struct ecoff_debug_swap *input_swap;
4165 struct ecoff_debug_info input_debug;
4169 if (p->type != bfd_indirect_link_order)
4171 if (p->type == bfd_fill_link_order)
4176 input_section = p->u.indirect.section;
4177 input_bfd = input_section->owner;
4179 if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
4180 || (get_elf_backend_data (input_bfd)
4181 ->elf_backend_ecoff_debug_swap) == NULL)
4183 /* I don't know what a non ALPHA ELF bfd would be
4184 doing with a .mdebug section, but I don't really
4185 want to deal with it. */
4189 input_swap = (get_elf_backend_data (input_bfd)
4190 ->elf_backend_ecoff_debug_swap);
4192 BFD_ASSERT (p->size == input_section->_raw_size);
4194 /* The ECOFF linking code expects that we have already
4195 read in the debugging information and set up an
4196 ecoff_debug_info structure, so we do that now. */
4197 if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
4201 if (! (bfd_ecoff_debug_accumulate
4202 (mdebug_handle, abfd, &debug, swap, input_bfd,
4203 &input_debug, input_swap, info)))
4206 /* Loop through the external symbols. For each one with
4207 interesting information, try to find the symbol in
4208 the linker global hash table and save the information
4209 for the output external symbols. */
4210 eraw_src = input_debug.external_ext;
4211 eraw_end = (eraw_src
4212 + (input_debug.symbolic_header.iextMax
4213 * input_swap->external_ext_size));
4215 eraw_src < eraw_end;
4216 eraw_src += input_swap->external_ext_size)
4220 struct alpha_elf_link_hash_entry *h;
4222 (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
4223 if (ext.asym.sc == scNil
4224 || ext.asym.sc == scUndefined
4225 || ext.asym.sc == scSUndefined)
4228 name = input_debug.ssext + ext.asym.iss;
4229 h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info),
4230 name, false, false, true);
4231 if (h == NULL || h->esym.ifd != -2)
4237 < input_debug.symbolic_header.ifdMax);
4238 ext.ifd = input_debug.ifdmap[ext.ifd];
4244 /* Free up the information we just read. */
4245 free (input_debug.line);
4246 free (input_debug.external_dnr);
4247 free (input_debug.external_pdr);
4248 free (input_debug.external_sym);
4249 free (input_debug.external_opt);
4250 free (input_debug.external_aux);
4251 free (input_debug.ss);
4252 free (input_debug.ssext);
4253 free (input_debug.external_fdr);
4254 free (input_debug.external_rfd);
4255 free (input_debug.external_ext);
4257 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4258 elf_link_input_bfd ignores this section. */
4259 input_section->flags &=~ SEC_HAS_CONTENTS;
4262 #ifdef ERIC_neverdef
4265 /* Create .rtproc section. */
4266 rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
4267 if (rtproc_sec == NULL)
4269 flagword flags = (SEC_HAS_CONTENTS
4271 | SEC_LINKER_CREATED
4274 rtproc_sec = bfd_make_section (abfd, ".rtproc");
4275 if (rtproc_sec == NULL
4276 || ! bfd_set_section_flags (abfd, rtproc_sec, flags)
4277 || ! bfd_set_section_alignment (abfd, rtproc_sec, 12))
4281 if (! alpha_elf_create_procedure_table (mdebug_handle, abfd,
4282 info, rtproc_sec, &debug))
4288 /* Build the external symbol information. */
4291 einfo.debug = &debug;
4293 einfo.failed = false;
4294 elf_link_hash_traverse (elf_hash_table (info),
4295 elf64_alpha_output_extsym,
4300 /* Set the size of the .mdebug section. */
4301 o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
4303 /* Skip this section later on (I don't think this currently
4304 matters, but someday it might). */
4305 o->link_order_head = (struct bfd_link_order *) NULL;
4310 #ifdef ERIC_neverdef
4311 if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0)
4313 const char *subname;
4316 Elf64_External_gptab *ext_tab;
4319 /* The .gptab.sdata and .gptab.sbss sections hold
4320 information describing how the small data area would
4321 change depending upon the -G switch. These sections
4322 not used in executables files. */
4323 if (! info->relocateable)
4327 for (p = o->link_order_head;
4328 p != (struct bfd_link_order *) NULL;
4331 asection *input_section;
4333 if (p->type != bfd_indirect_link_order)
4335 if (p->type == bfd_fill_link_order)
4340 input_section = p->u.indirect.section;
4342 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4343 elf_link_input_bfd ignores this section. */
4344 input_section->flags &=~ SEC_HAS_CONTENTS;
4347 /* Skip this section later on (I don't think this
4348 currently matters, but someday it might). */
4349 o->link_order_head = (struct bfd_link_order *) NULL;
4351 /* Really remove the section. */
4352 for (secpp = &abfd->sections;
4354 secpp = &(*secpp)->next)
4356 *secpp = (*secpp)->next;
4357 --abfd->section_count;
4362 /* There is one gptab for initialized data, and one for
4363 uninitialized data. */
4364 if (strcmp (o->name, ".gptab.sdata") == 0)
4366 else if (strcmp (o->name, ".gptab.sbss") == 0)
4370 (*_bfd_error_handler)
4371 (_("%s: illegal section name `%s'"),
4372 bfd_get_filename (abfd), o->name);
4373 bfd_set_error (bfd_error_nonrepresentable_section);
4377 /* The linker script always combines .gptab.data and
4378 .gptab.sdata into .gptab.sdata, and likewise for
4379 .gptab.bss and .gptab.sbss. It is possible that there is
4380 no .sdata or .sbss section in the output file, in which
4381 case we must change the name of the output section. */
4382 subname = o->name + sizeof ".gptab" - 1;
4383 if (bfd_get_section_by_name (abfd, subname) == NULL)
4385 if (o == gptab_data_sec)
4386 o->name = ".gptab.data";
4388 o->name = ".gptab.bss";
4389 subname = o->name + sizeof ".gptab" - 1;
4390 BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL);
4393 /* Set up the first entry. */
4395 tab = (Elf64_gptab *) bfd_malloc (c * sizeof (Elf64_gptab));
4398 tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd);
4399 tab[0].gt_header.gt_unused = 0;
4401 /* Combine the input sections. */
4402 for (p = o->link_order_head;
4403 p != (struct bfd_link_order *) NULL;
4406 asection *input_section;
4410 bfd_size_type gpentry;
4412 if (p->type != bfd_indirect_link_order)
4414 if (p->type == bfd_fill_link_order)
4419 input_section = p->u.indirect.section;
4420 input_bfd = input_section->owner;
4422 /* Combine the gptab entries for this input section one
4423 by one. We know that the input gptab entries are
4424 sorted by ascending -G value. */
4425 size = bfd_section_size (input_bfd, input_section);
4427 for (gpentry = sizeof (Elf64_External_gptab);
4429 gpentry += sizeof (Elf64_External_gptab))
4431 Elf64_External_gptab ext_gptab;
4432 Elf64_gptab int_gptab;
4438 if (! (bfd_get_section_contents
4439 (input_bfd, input_section, (PTR) &ext_gptab,
4440 gpentry, sizeof (Elf64_External_gptab))))
4446 bfd_alpha_elf64_swap_gptab_in (input_bfd, &ext_gptab,
4448 val = int_gptab.gt_entry.gt_g_value;
4449 add = int_gptab.gt_entry.gt_bytes - last;
4452 for (look = 1; look < c; look++)
4454 if (tab[look].gt_entry.gt_g_value >= val)
4455 tab[look].gt_entry.gt_bytes += add;
4457 if (tab[look].gt_entry.gt_g_value == val)
4463 Elf64_gptab *new_tab;
4466 /* We need a new table entry. */
4467 new_tab = ((Elf64_gptab *)
4468 bfd_realloc ((PTR) tab,
4469 (c + 1) * sizeof (Elf64_gptab)));
4470 if (new_tab == NULL)
4476 tab[c].gt_entry.gt_g_value = val;
4477 tab[c].gt_entry.gt_bytes = add;
4479 /* Merge in the size for the next smallest -G
4480 value, since that will be implied by this new
4483 for (look = 1; look < c; look++)
4485 if (tab[look].gt_entry.gt_g_value < val
4487 || (tab[look].gt_entry.gt_g_value
4488 > tab[max].gt_entry.gt_g_value)))
4492 tab[c].gt_entry.gt_bytes +=
4493 tab[max].gt_entry.gt_bytes;
4498 last = int_gptab.gt_entry.gt_bytes;
4501 /* Hack: reset the SEC_HAS_CONTENTS flag so that
4502 elf_link_input_bfd ignores this section. */
4503 input_section->flags &=~ SEC_HAS_CONTENTS;
4506 /* The table must be sorted by -G value. */
4508 qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare);
4510 /* Swap out the table. */
4511 ext_tab = ((Elf64_External_gptab *)
4512 bfd_alloc (abfd, c * sizeof (Elf64_External_gptab)));
4513 if (ext_tab == NULL)
4519 for (i = 0; i < c; i++)
4520 bfd_alpha_elf64_swap_gptab_out (abfd, tab + i, ext_tab + i);
4523 o->_raw_size = c * sizeof (Elf64_External_gptab);
4524 o->contents = (bfd_byte *) ext_tab;
4526 /* Skip this section later on (I don't think this currently
4527 matters, but someday it might). */
4528 o->link_order_head = (struct bfd_link_order *) NULL;
4534 /* Invoke the regular ELF backend linker to do all the work. */
4535 if (! bfd_elf64_bfd_final_link (abfd, info))
4538 /* Now write out the computed sections. */
4540 /* The .got subsections... */
4542 bfd *i, *dynobj = elf_hash_table(info)->dynobj;
4543 for (i = alpha_elf_hash_table(info)->got_list;
4545 i = alpha_elf_tdata(i)->got_link_next)
4549 /* elf_bfd_final_link already did everything in dynobj. */
4553 sgot = alpha_elf_tdata(i)->got;
4554 if (! bfd_set_section_contents (abfd, sgot->output_section,
4555 sgot->contents, sgot->output_offset,
4561 #ifdef ERIC_neverdef
4562 if (reginfo_sec != (asection *) NULL)
4564 Elf64_External_RegInfo ext;
4566 bfd_alpha_elf64_swap_reginfo_out (abfd, ®info, &ext);
4567 if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext,
4568 (file_ptr) 0, sizeof ext))
4573 if (mdebug_sec != (asection *) NULL)
4575 BFD_ASSERT (abfd->output_has_begun);
4576 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
4578 mdebug_sec->filepos))
4581 bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
4584 if (gptab_data_sec != (asection *) NULL)
4586 if (! bfd_set_section_contents (abfd, gptab_data_sec,
4587 gptab_data_sec->contents,
4589 gptab_data_sec->_raw_size))
4593 if (gptab_bss_sec != (asection *) NULL)
4595 if (! bfd_set_section_contents (abfd, gptab_bss_sec,
4596 gptab_bss_sec->contents,
4598 gptab_bss_sec->_raw_size))
4605 /* ECOFF swapping routines. These are used when dealing with the
4606 .mdebug section, which is in the ECOFF debugging format. Copied
4607 from elf32-mips.c. */
4608 static const struct ecoff_debug_swap
4609 elf64_alpha_ecoff_debug_swap =
4611 /* Symbol table magic number. */
4613 /* Alignment of debugging information. E.g., 4. */
4615 /* Sizes of external symbolic information. */
4616 sizeof (struct hdr_ext),
4617 sizeof (struct dnr_ext),
4618 sizeof (struct pdr_ext),
4619 sizeof (struct sym_ext),
4620 sizeof (struct opt_ext),
4621 sizeof (struct fdr_ext),
4622 sizeof (struct rfd_ext),
4623 sizeof (struct ext_ext),
4624 /* Functions to swap in external symbolic data. */
4633 _bfd_ecoff_swap_tir_in,
4634 _bfd_ecoff_swap_rndx_in,
4635 /* Functions to swap out external symbolic data. */
4644 _bfd_ecoff_swap_tir_out,
4645 _bfd_ecoff_swap_rndx_out,
4646 /* Function to read in symbolic data. */
4647 elf64_alpha_read_ecoff_info
4650 #define TARGET_LITTLE_SYM bfd_elf64_alpha_vec
4651 #define TARGET_LITTLE_NAME "elf64-alpha"
4652 #define ELF_ARCH bfd_arch_alpha
4653 #define ELF_MACHINE_CODE EM_ALPHA
4654 #define ELF_MAXPAGESIZE 0x10000
4656 #define bfd_elf64_bfd_link_hash_table_create \
4657 elf64_alpha_bfd_link_hash_table_create
4659 #define bfd_elf64_bfd_reloc_type_lookup \
4660 elf64_alpha_bfd_reloc_type_lookup
4661 #define elf_info_to_howto \
4662 elf64_alpha_info_to_howto
4664 #define bfd_elf64_mkobject \
4665 elf64_alpha_mkobject
4666 #define elf_backend_object_p \
4667 elf64_alpha_object_p
4669 #define elf_backend_section_from_shdr \
4670 elf64_alpha_section_from_shdr
4671 #define elf_backend_fake_sections \
4672 elf64_alpha_fake_sections
4673 #define elf_backend_additional_program_headers \
4674 elf64_alpha_additional_program_headers
4676 #define bfd_elf64_bfd_is_local_label_name \
4677 elf64_alpha_is_local_label_name
4678 #define bfd_elf64_find_nearest_line \
4679 elf64_alpha_find_nearest_line
4680 #define bfd_elf64_bfd_relax_section \
4681 elf64_alpha_relax_section
4683 #define elf_backend_add_symbol_hook \
4684 elf64_alpha_add_symbol_hook
4685 #define elf_backend_check_relocs \
4686 elf64_alpha_check_relocs
4687 #define elf_backend_create_dynamic_sections \
4688 elf64_alpha_create_dynamic_sections
4689 #define elf_backend_adjust_dynamic_symbol \
4690 elf64_alpha_adjust_dynamic_symbol
4691 #define elf_backend_always_size_sections \
4692 elf64_alpha_always_size_sections
4693 #define elf_backend_size_dynamic_sections \
4694 elf64_alpha_size_dynamic_sections
4695 #define elf_backend_relocate_section \
4696 elf64_alpha_relocate_section
4697 #define elf_backend_finish_dynamic_symbol \
4698 elf64_alpha_finish_dynamic_symbol
4699 #define elf_backend_finish_dynamic_sections \
4700 elf64_alpha_finish_dynamic_sections
4701 #define bfd_elf64_bfd_final_link \
4702 elf64_alpha_final_link
4704 #define elf_backend_ecoff_debug_swap \
4705 &elf64_alpha_ecoff_debug_swap
4708 * A few constants that determine how the .plt section is set up.
4710 #define elf_backend_want_got_plt 0
4711 #define elf_backend_plt_readonly 0
4712 #define elf_backend_want_plt_sym 1
4714 #include "elf64-target.h"