1 /* Alpha specific support for 64-bit ELF
2 Copyright (C) 1996-2017 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
23 /* We need a published ABI spec for this. Until one comes out, don't
24 assume this'll remain unchanged forever. */
31 #include "elf/alpha.h"
35 #define NO_COFF_RELOCS
36 #define NO_COFF_SYMBOLS
37 #define NO_COFF_LINENOS
39 /* Get the ECOFF swapping routines. Needed for the debug information. */
40 #include "coff/internal.h"
42 #include "coff/symconst.h"
43 #include "coff/ecoff.h"
44 #include "coff/alpha.h"
49 #include "ecoffswap.h"
52 /* Instruction data for plt generation and relaxation. */
60 #define INSN_LDA (OP_LDA << 26)
61 #define INSN_LDAH (OP_LDAH << 26)
62 #define INSN_LDQ (OP_LDQ << 26)
63 #define INSN_BR (OP_BR << 26)
65 #define INSN_ADDQ 0x40000400
66 #define INSN_RDUNIQ 0x0000009e
67 #define INSN_SUBQ 0x40000520
68 #define INSN_S4SUBQ 0x40000560
69 #define INSN_UNOP 0x2ffe0000
71 #define INSN_JSR 0x68004000
72 #define INSN_JMP 0x68000000
73 #define INSN_JSR_MASK 0xfc00c000
75 #define INSN_A(I,A) (I | (A << 21))
76 #define INSN_AB(I,A,B) (I | (A << 21) | (B << 16))
77 #define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C)
78 #define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff))
79 #define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff))
83 /* Set by ld emulation. Putting this into the link_info or hash structure
84 is simply working too hard. */
86 bfd_boolean elf64_alpha_use_secureplt
= TRUE
;
88 bfd_boolean elf64_alpha_use_secureplt
= FALSE
;
91 #define OLD_PLT_HEADER_SIZE 32
92 #define OLD_PLT_ENTRY_SIZE 12
93 #define NEW_PLT_HEADER_SIZE 36
94 #define NEW_PLT_ENTRY_SIZE 4
96 #define PLT_HEADER_SIZE \
97 (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
98 #define PLT_ENTRY_SIZE \
99 (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
101 #define MAX_GOT_SIZE (64*1024)
103 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
106 /* Used to implement multiple .got subsections. */
107 struct alpha_elf_got_entry
109 struct alpha_elf_got_entry
*next
;
111 /* Which .got subsection? */
114 /* The addend in effect for this entry. */
117 /* The .got offset for this entry. */
120 /* The .plt offset for this entry. */
123 /* How many references to this entry? */
126 /* The relocation type of this entry. */
127 unsigned char reloc_type
;
129 /* How a LITERAL is used. */
132 /* Have we initialized the dynamic relocation for this entry? */
133 unsigned char reloc_done
;
135 /* Have we adjusted this entry for SEC_MERGE? */
136 unsigned char reloc_xlated
;
139 struct alpha_elf_reloc_entry
141 struct alpha_elf_reloc_entry
*next
;
143 /* Which .reloc section? */
146 /* What kind of relocation? */
149 /* Is this against read-only section? */
150 unsigned int reltext
: 1;
152 /* How many did we find? */
156 struct alpha_elf_link_hash_entry
158 struct elf_link_hash_entry root
;
160 /* External symbol information. */
163 /* Cumulative flags for all the .got entries. */
166 /* Contexts in which a literal was referenced. */
167 #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
168 #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
169 #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
170 #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
171 #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
172 #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
173 #define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
174 #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
175 #define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
177 /* Used to implement multiple .got subsections. */
178 struct alpha_elf_got_entry
*got_entries
;
180 /* Used to count non-got, non-plt relocations for delayed sizing
181 of relocation sections. */
182 struct alpha_elf_reloc_entry
*reloc_entries
;
185 /* Alpha ELF linker hash table. */
187 struct alpha_elf_link_hash_table
189 struct elf_link_hash_table root
;
191 /* The head of a list of .got subsections linked through
192 alpha_elf_tdata(abfd)->got_link_next. */
195 /* The most recent relax pass that we've seen. The GOTs
196 should be regenerated if this doesn't match. */
200 /* Look up an entry in a Alpha ELF linker hash table. */
202 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
203 ((struct alpha_elf_link_hash_entry *) \
204 elf_link_hash_lookup (&(table)->root, (string), (create), \
207 /* Traverse a Alpha ELF linker hash table. */
209 #define alpha_elf_link_hash_traverse(table, func, info) \
210 (elf_link_hash_traverse \
212 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
215 /* Get the Alpha ELF linker hash table from a link_info structure. */
217 #define alpha_elf_hash_table(p) \
218 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
219 == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL)
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? This differs from the
227 generic version in that we never need to consider function pointer
228 equality wrt PLT entries -- we don't create a PLT entry if a symbol's
229 address is ever taken. */
231 static inline bfd_boolean
232 alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
233 struct bfd_link_info
*info
)
235 return _bfd_elf_dynamic_symbol_p (h
, info
, 0);
238 /* Create an entry in a Alpha ELF linker hash table. */
240 static struct bfd_hash_entry
*
241 elf64_alpha_link_hash_newfunc (struct bfd_hash_entry
*entry
,
242 struct bfd_hash_table
*table
,
245 struct alpha_elf_link_hash_entry
*ret
=
246 (struct alpha_elf_link_hash_entry
*) entry
;
248 /* Allocate the structure if it has not already been allocated by a
250 if (ret
== (struct alpha_elf_link_hash_entry
*) NULL
)
251 ret
= ((struct alpha_elf_link_hash_entry
*)
252 bfd_hash_allocate (table
,
253 sizeof (struct alpha_elf_link_hash_entry
)));
254 if (ret
== (struct alpha_elf_link_hash_entry
*) NULL
)
255 return (struct bfd_hash_entry
*) ret
;
257 /* Call the allocation method of the superclass. */
258 ret
= ((struct alpha_elf_link_hash_entry
*)
259 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
261 if (ret
!= (struct alpha_elf_link_hash_entry
*) NULL
)
263 /* Set local fields. */
264 memset (&ret
->esym
, 0, sizeof (EXTR
));
265 /* We use -2 as a marker to indicate that the information has
266 not been set. -1 means there is no associated ifd. */
269 ret
->got_entries
= NULL
;
270 ret
->reloc_entries
= NULL
;
273 return (struct bfd_hash_entry
*) ret
;
276 /* Create a Alpha ELF linker hash table. */
278 static struct bfd_link_hash_table
*
279 elf64_alpha_bfd_link_hash_table_create (bfd
*abfd
)
281 struct alpha_elf_link_hash_table
*ret
;
282 bfd_size_type amt
= sizeof (struct alpha_elf_link_hash_table
);
284 ret
= (struct alpha_elf_link_hash_table
*) bfd_zmalloc (amt
);
285 if (ret
== (struct alpha_elf_link_hash_table
*) NULL
)
288 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
289 elf64_alpha_link_hash_newfunc
,
290 sizeof (struct alpha_elf_link_hash_entry
),
297 return &ret
->root
.root
;
300 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
301 routine in order to handle the ECOFF debugging information. */
303 struct alpha_elf_find_line
305 struct ecoff_debug_info d
;
306 struct ecoff_find_line i
;
309 /* We have some private fields hanging off of the elf_tdata structure. */
311 struct alpha_elf_obj_tdata
313 struct elf_obj_tdata root
;
315 /* For every input file, these are the got entries for that object's
317 struct alpha_elf_got_entry
** local_got_entries
;
319 /* For every input file, this is the object that owns the got that
320 this input file uses. */
323 /* For every got, this is a linked list through the objects using this got */
324 bfd
*in_got_link_next
;
326 /* For every got, this is a link to the next got subsegment. */
329 /* For every got, this is the section. */
332 /* For every got, this is it's total number of words. */
335 /* For every got, this is the sum of the number of words required
336 to hold all of the member object's local got. */
339 /* Used by elf64_alpha_find_nearest_line entry point. */
340 struct alpha_elf_find_line
*find_line_info
;
344 #define alpha_elf_tdata(abfd) \
345 ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
347 #define is_alpha_elf(bfd) \
348 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
349 && elf_tdata (bfd) != NULL \
350 && elf_object_id (bfd) == ALPHA_ELF_DATA)
353 elf64_alpha_mkobject (bfd
*abfd
)
355 return bfd_elf_allocate_object (abfd
, sizeof (struct alpha_elf_obj_tdata
),
360 elf64_alpha_object_p (bfd
*abfd
)
362 /* Set the right machine number for an Alpha ELF file. */
363 return bfd_default_set_arch_mach (abfd
, bfd_arch_alpha
, 0);
366 /* A relocation function which doesn't do anything. */
368 static bfd_reloc_status_type
369 elf64_alpha_reloc_nil (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*reloc
,
370 asymbol
*sym ATTRIBUTE_UNUSED
,
371 void * data ATTRIBUTE_UNUSED
, asection
*sec
,
372 bfd
*output_bfd
, char **error_message ATTRIBUTE_UNUSED
)
375 reloc
->address
+= sec
->output_offset
;
379 /* A relocation function used for an unsupported reloc. */
381 static bfd_reloc_status_type
382 elf64_alpha_reloc_bad (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*reloc
,
383 asymbol
*sym ATTRIBUTE_UNUSED
,
384 void * data ATTRIBUTE_UNUSED
, asection
*sec
,
385 bfd
*output_bfd
, char **error_message ATTRIBUTE_UNUSED
)
388 reloc
->address
+= sec
->output_offset
;
389 return bfd_reloc_notsupported
;
392 /* Do the work of the GPDISP relocation. */
394 static bfd_reloc_status_type
395 elf64_alpha_do_reloc_gpdisp (bfd
*abfd
, bfd_vma gpdisp
, bfd_byte
*p_ldah
,
398 bfd_reloc_status_type ret
= bfd_reloc_ok
;
400 unsigned long i_ldah
, i_lda
;
402 i_ldah
= bfd_get_32 (abfd
, p_ldah
);
403 i_lda
= bfd_get_32 (abfd
, p_lda
);
405 /* Complain if the instructions are not correct. */
406 if (((i_ldah
>> 26) & 0x3f) != 0x09
407 || ((i_lda
>> 26) & 0x3f) != 0x08)
408 ret
= bfd_reloc_dangerous
;
410 /* Extract the user-supplied offset, mirroring the sign extensions
411 that the instructions perform. */
412 addend
= ((i_ldah
& 0xffff) << 16) | (i_lda
& 0xffff);
413 addend
= (addend
^ 0x80008000) - 0x80008000;
417 if ((bfd_signed_vma
) gpdisp
< -(bfd_signed_vma
) 0x80000000
418 || (bfd_signed_vma
) gpdisp
>= (bfd_signed_vma
) 0x7fff8000)
419 ret
= bfd_reloc_overflow
;
421 /* compensate for the sign extension again. */
422 i_ldah
= ((i_ldah
& 0xffff0000)
423 | (((gpdisp
>> 16) + ((gpdisp
>> 15) & 1)) & 0xffff));
424 i_lda
= (i_lda
& 0xffff0000) | (gpdisp
& 0xffff);
426 bfd_put_32 (abfd
, (bfd_vma
) i_ldah
, p_ldah
);
427 bfd_put_32 (abfd
, (bfd_vma
) i_lda
, p_lda
);
432 /* The special function for the GPDISP reloc. */
434 static bfd_reloc_status_type
435 elf64_alpha_reloc_gpdisp (bfd
*abfd
, arelent
*reloc_entry
,
436 asymbol
*sym ATTRIBUTE_UNUSED
, void * data
,
437 asection
*input_section
, bfd
*output_bfd
,
440 bfd_reloc_status_type ret
;
441 bfd_vma gp
, relocation
;
442 bfd_vma high_address
;
443 bfd_byte
*p_ldah
, *p_lda
;
445 /* Don't do anything if we're not doing a final link. */
448 reloc_entry
->address
+= input_section
->output_offset
;
452 high_address
= bfd_get_section_limit (abfd
, input_section
);
453 if (reloc_entry
->address
> high_address
454 || reloc_entry
->address
+ reloc_entry
->addend
> high_address
)
455 return bfd_reloc_outofrange
;
457 /* The gp used in the portion of the output object to which this
458 input object belongs is cached on the input bfd. */
459 gp
= _bfd_get_gp_value (abfd
);
461 relocation
= (input_section
->output_section
->vma
462 + input_section
->output_offset
463 + reloc_entry
->address
);
465 p_ldah
= (bfd_byte
*) data
+ reloc_entry
->address
;
466 p_lda
= p_ldah
+ reloc_entry
->addend
;
468 ret
= elf64_alpha_do_reloc_gpdisp (abfd
, gp
- relocation
, p_ldah
, p_lda
);
470 /* Complain if the instructions are not correct. */
471 if (ret
== bfd_reloc_dangerous
)
472 *err_msg
= _("GPDISP relocation did not find ldah and lda instructions");
477 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
478 from smaller values. Start with zero, widen, *then* decrement. */
479 #define MINUS_ONE (((bfd_vma)0) - 1)
482 #define SKIP_HOWTO(N) \
483 HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
485 static reloc_howto_type elf64_alpha_howto_table
[] =
487 HOWTO (R_ALPHA_NONE
, /* type */
489 3, /* size (0 = byte, 1 = short, 2 = long) */
491 TRUE
, /* pc_relative */
493 complain_overflow_dont
, /* complain_on_overflow */
494 elf64_alpha_reloc_nil
, /* special_function */
496 FALSE
, /* partial_inplace */
499 TRUE
), /* pcrel_offset */
501 /* A 32 bit reference to a symbol. */
502 HOWTO (R_ALPHA_REFLONG
, /* type */
504 2, /* size (0 = byte, 1 = short, 2 = long) */
506 FALSE
, /* pc_relative */
508 complain_overflow_bitfield
, /* complain_on_overflow */
509 bfd_elf_generic_reloc
, /* special_function */
510 "REFLONG", /* name */
511 FALSE
, /* partial_inplace */
512 0xffffffff, /* src_mask */
513 0xffffffff, /* dst_mask */
514 FALSE
), /* pcrel_offset */
516 /* A 64 bit reference to a symbol. */
517 HOWTO (R_ALPHA_REFQUAD
, /* type */
519 4, /* size (0 = byte, 1 = short, 2 = long) */
521 FALSE
, /* pc_relative */
523 complain_overflow_bitfield
, /* complain_on_overflow */
524 bfd_elf_generic_reloc
, /* special_function */
525 "REFQUAD", /* name */
526 FALSE
, /* partial_inplace */
527 MINUS_ONE
, /* src_mask */
528 MINUS_ONE
, /* dst_mask */
529 FALSE
), /* pcrel_offset */
531 /* A 32 bit GP relative offset. This is just like REFLONG except
532 that when the value is used the value of the gp register will be
534 HOWTO (R_ALPHA_GPREL32
, /* type */
536 2, /* size (0 = byte, 1 = short, 2 = long) */
538 FALSE
, /* pc_relative */
540 complain_overflow_bitfield
, /* complain_on_overflow */
541 bfd_elf_generic_reloc
, /* special_function */
542 "GPREL32", /* name */
543 FALSE
, /* partial_inplace */
544 0xffffffff, /* src_mask */
545 0xffffffff, /* dst_mask */
546 FALSE
), /* pcrel_offset */
548 /* Used for an instruction that refers to memory off the GP register. */
549 HOWTO (R_ALPHA_LITERAL
, /* type */
551 1, /* size (0 = byte, 1 = short, 2 = long) */
553 FALSE
, /* pc_relative */
555 complain_overflow_signed
, /* complain_on_overflow */
556 bfd_elf_generic_reloc
, /* special_function */
557 "ELF_LITERAL", /* name */
558 FALSE
, /* partial_inplace */
559 0xffff, /* src_mask */
560 0xffff, /* dst_mask */
561 FALSE
), /* pcrel_offset */
563 /* This reloc only appears immediately following an ELF_LITERAL reloc.
564 It identifies a use of the literal. The symbol index is special:
565 1 means the literal address is in the base register of a memory
566 format instruction; 2 means the literal address is in the byte
567 offset register of a byte-manipulation instruction; 3 means the
568 literal address is in the target register of a jsr instruction.
569 This does not actually do any relocation. */
570 HOWTO (R_ALPHA_LITUSE
, /* type */
572 1, /* size (0 = byte, 1 = short, 2 = long) */
574 FALSE
, /* pc_relative */
576 complain_overflow_dont
, /* complain_on_overflow */
577 elf64_alpha_reloc_nil
, /* special_function */
579 FALSE
, /* partial_inplace */
582 FALSE
), /* pcrel_offset */
584 /* Load the gp register. This is always used for a ldah instruction
585 which loads the upper 16 bits of the gp register. The symbol
586 index of the GPDISP instruction is an offset in bytes to the lda
587 instruction that loads the lower 16 bits. The value to use for
588 the relocation is the difference between the GP value and the
589 current location; the load will always be done against a register
590 holding the current address.
592 NOTE: Unlike ECOFF, partial in-place relocation is not done. If
593 any offset is present in the instructions, it is an offset from
594 the register to the ldah instruction. This lets us avoid any
595 stupid hackery like inventing a gp value to do partial relocation
596 against. Also unlike ECOFF, we do the whole relocation off of
597 the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
598 space consuming bit, that, since all the information was present
599 in the GPDISP_HI16 reloc. */
600 HOWTO (R_ALPHA_GPDISP
, /* type */
602 2, /* size (0 = byte, 1 = short, 2 = long) */
604 FALSE
, /* pc_relative */
606 complain_overflow_dont
, /* complain_on_overflow */
607 elf64_alpha_reloc_gpdisp
, /* special_function */
609 FALSE
, /* partial_inplace */
610 0xffff, /* src_mask */
611 0xffff, /* dst_mask */
612 TRUE
), /* pcrel_offset */
614 /* A 21 bit branch. */
615 HOWTO (R_ALPHA_BRADDR
, /* type */
617 2, /* size (0 = byte, 1 = short, 2 = long) */
619 TRUE
, /* pc_relative */
621 complain_overflow_signed
, /* complain_on_overflow */
622 bfd_elf_generic_reloc
, /* special_function */
624 FALSE
, /* partial_inplace */
625 0x1fffff, /* src_mask */
626 0x1fffff, /* dst_mask */
627 TRUE
), /* pcrel_offset */
629 /* A hint for a jump to a register. */
630 HOWTO (R_ALPHA_HINT
, /* type */
632 1, /* size (0 = byte, 1 = short, 2 = long) */
634 TRUE
, /* pc_relative */
636 complain_overflow_dont
, /* complain_on_overflow */
637 bfd_elf_generic_reloc
, /* special_function */
639 FALSE
, /* partial_inplace */
640 0x3fff, /* src_mask */
641 0x3fff, /* dst_mask */
642 TRUE
), /* pcrel_offset */
644 /* 16 bit PC relative offset. */
645 HOWTO (R_ALPHA_SREL16
, /* type */
647 1, /* size (0 = byte, 1 = short, 2 = long) */
649 TRUE
, /* pc_relative */
651 complain_overflow_signed
, /* complain_on_overflow */
652 bfd_elf_generic_reloc
, /* special_function */
654 FALSE
, /* partial_inplace */
655 0xffff, /* src_mask */
656 0xffff, /* dst_mask */
657 TRUE
), /* pcrel_offset */
659 /* 32 bit PC relative offset. */
660 HOWTO (R_ALPHA_SREL32
, /* type */
662 2, /* size (0 = byte, 1 = short, 2 = long) */
664 TRUE
, /* pc_relative */
666 complain_overflow_signed
, /* complain_on_overflow */
667 bfd_elf_generic_reloc
, /* special_function */
669 FALSE
, /* partial_inplace */
670 0xffffffff, /* src_mask */
671 0xffffffff, /* dst_mask */
672 TRUE
), /* pcrel_offset */
674 /* A 64 bit PC relative offset. */
675 HOWTO (R_ALPHA_SREL64
, /* type */
677 4, /* size (0 = byte, 1 = short, 2 = long) */
679 TRUE
, /* pc_relative */
681 complain_overflow_signed
, /* complain_on_overflow */
682 bfd_elf_generic_reloc
, /* special_function */
684 FALSE
, /* partial_inplace */
685 MINUS_ONE
, /* src_mask */
686 MINUS_ONE
, /* dst_mask */
687 TRUE
), /* pcrel_offset */
689 /* Skip 12 - 16; deprecated ECOFF relocs. */
696 /* The high 16 bits of the displacement from GP to the target. */
697 HOWTO (R_ALPHA_GPRELHIGH
,
699 1, /* size (0 = byte, 1 = short, 2 = long) */
701 FALSE
, /* pc_relative */
703 complain_overflow_signed
, /* complain_on_overflow */
704 bfd_elf_generic_reloc
, /* special_function */
705 "GPRELHIGH", /* name */
706 FALSE
, /* partial_inplace */
707 0xffff, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE
), /* pcrel_offset */
711 /* The low 16 bits of the displacement from GP to the target. */
712 HOWTO (R_ALPHA_GPRELLOW
,
714 1, /* size (0 = byte, 1 = short, 2 = long) */
716 FALSE
, /* pc_relative */
718 complain_overflow_dont
, /* complain_on_overflow */
719 bfd_elf_generic_reloc
, /* special_function */
720 "GPRELLOW", /* name */
721 FALSE
, /* partial_inplace */
722 0xffff, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE
), /* pcrel_offset */
726 /* A 16-bit displacement from the GP to the target. */
727 HOWTO (R_ALPHA_GPREL16
,
729 1, /* size (0 = byte, 1 = short, 2 = long) */
731 FALSE
, /* pc_relative */
733 complain_overflow_signed
, /* complain_on_overflow */
734 bfd_elf_generic_reloc
, /* special_function */
735 "GPREL16", /* name */
736 FALSE
, /* partial_inplace */
737 0xffff, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE
), /* pcrel_offset */
741 /* Skip 20 - 23; deprecated ECOFF relocs. */
747 /* Misc ELF relocations. */
749 /* A dynamic relocation to copy the target into our .dynbss section. */
750 /* Not generated, as all Alpha objects use PIC, so it is not needed. It
751 is present because every other ELF has one, but should not be used
752 because .dynbss is an ugly thing. */
759 complain_overflow_dont
,
760 bfd_elf_generic_reloc
,
767 /* A dynamic relocation for a .got entry. */
768 HOWTO (R_ALPHA_GLOB_DAT
,
774 complain_overflow_dont
,
775 bfd_elf_generic_reloc
,
782 /* A dynamic relocation for a .plt entry. */
783 HOWTO (R_ALPHA_JMP_SLOT
,
789 complain_overflow_dont
,
790 bfd_elf_generic_reloc
,
797 /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
798 HOWTO (R_ALPHA_RELATIVE
,
804 complain_overflow_dont
,
805 bfd_elf_generic_reloc
,
812 /* A 21 bit branch that adjusts for gp loads. */
813 HOWTO (R_ALPHA_BRSGP
, /* type */
815 2, /* size (0 = byte, 1 = short, 2 = long) */
817 TRUE
, /* pc_relative */
819 complain_overflow_signed
, /* complain_on_overflow */
820 bfd_elf_generic_reloc
, /* special_function */
822 FALSE
, /* partial_inplace */
823 0x1fffff, /* src_mask */
824 0x1fffff, /* dst_mask */
825 TRUE
), /* pcrel_offset */
827 /* Creates a tls_index for the symbol in the got. */
828 HOWTO (R_ALPHA_TLSGD
, /* type */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
832 FALSE
, /* pc_relative */
834 complain_overflow_signed
, /* complain_on_overflow */
835 bfd_elf_generic_reloc
, /* special_function */
837 FALSE
, /* partial_inplace */
838 0xffff, /* src_mask */
839 0xffff, /* dst_mask */
840 FALSE
), /* pcrel_offset */
842 /* Creates a tls_index for the (current) module in the got. */
843 HOWTO (R_ALPHA_TLSLDM
, /* type */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
847 FALSE
, /* pc_relative */
849 complain_overflow_signed
, /* complain_on_overflow */
850 bfd_elf_generic_reloc
, /* special_function */
852 FALSE
, /* partial_inplace */
853 0xffff, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE
), /* pcrel_offset */
857 /* A dynamic relocation for a DTP module entry. */
858 HOWTO (R_ALPHA_DTPMOD64
, /* type */
860 4, /* size (0 = byte, 1 = short, 2 = long) */
862 FALSE
, /* pc_relative */
864 complain_overflow_bitfield
, /* complain_on_overflow */
865 bfd_elf_generic_reloc
, /* special_function */
866 "DTPMOD64", /* name */
867 FALSE
, /* partial_inplace */
868 MINUS_ONE
, /* src_mask */
869 MINUS_ONE
, /* dst_mask */
870 FALSE
), /* pcrel_offset */
872 /* Creates a 64-bit offset in the got for the displacement
873 from DTP to the target. */
874 HOWTO (R_ALPHA_GOTDTPREL
, /* type */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
878 FALSE
, /* pc_relative */
880 complain_overflow_signed
, /* complain_on_overflow */
881 bfd_elf_generic_reloc
, /* special_function */
882 "GOTDTPREL", /* name */
883 FALSE
, /* partial_inplace */
884 0xffff, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE
), /* pcrel_offset */
888 /* A dynamic relocation for a displacement from DTP to the target. */
889 HOWTO (R_ALPHA_DTPREL64
, /* type */
891 4, /* size (0 = byte, 1 = short, 2 = long) */
893 FALSE
, /* pc_relative */
895 complain_overflow_bitfield
, /* complain_on_overflow */
896 bfd_elf_generic_reloc
, /* special_function */
897 "DTPREL64", /* name */
898 FALSE
, /* partial_inplace */
899 MINUS_ONE
, /* src_mask */
900 MINUS_ONE
, /* dst_mask */
901 FALSE
), /* pcrel_offset */
903 /* The high 16 bits of the displacement from DTP to the target. */
904 HOWTO (R_ALPHA_DTPRELHI
, /* type */
906 1, /* size (0 = byte, 1 = short, 2 = long) */
908 FALSE
, /* pc_relative */
910 complain_overflow_signed
, /* complain_on_overflow */
911 bfd_elf_generic_reloc
, /* special_function */
912 "DTPRELHI", /* name */
913 FALSE
, /* partial_inplace */
914 0xffff, /* src_mask */
915 0xffff, /* dst_mask */
916 FALSE
), /* pcrel_offset */
918 /* The low 16 bits of the displacement from DTP to the target. */
919 HOWTO (R_ALPHA_DTPRELLO
, /* type */
921 1, /* size (0 = byte, 1 = short, 2 = long) */
923 FALSE
, /* pc_relative */
925 complain_overflow_dont
, /* complain_on_overflow */
926 bfd_elf_generic_reloc
, /* special_function */
927 "DTPRELLO", /* name */
928 FALSE
, /* partial_inplace */
929 0xffff, /* src_mask */
930 0xffff, /* dst_mask */
931 FALSE
), /* pcrel_offset */
933 /* A 16-bit displacement from DTP to the target. */
934 HOWTO (R_ALPHA_DTPREL16
, /* type */
936 1, /* size (0 = byte, 1 = short, 2 = long) */
938 FALSE
, /* pc_relative */
940 complain_overflow_signed
, /* complain_on_overflow */
941 bfd_elf_generic_reloc
, /* special_function */
942 "DTPREL16", /* name */
943 FALSE
, /* partial_inplace */
944 0xffff, /* src_mask */
945 0xffff, /* dst_mask */
946 FALSE
), /* pcrel_offset */
948 /* Creates a 64-bit offset in the got for the displacement
949 from TP to the target. */
950 HOWTO (R_ALPHA_GOTTPREL
, /* type */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
954 FALSE
, /* pc_relative */
956 complain_overflow_signed
, /* complain_on_overflow */
957 bfd_elf_generic_reloc
, /* special_function */
958 "GOTTPREL", /* name */
959 FALSE
, /* partial_inplace */
960 0xffff, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE
), /* pcrel_offset */
964 /* A dynamic relocation for a displacement from TP to the target. */
965 HOWTO (R_ALPHA_TPREL64
, /* type */
967 4, /* size (0 = byte, 1 = short, 2 = long) */
969 FALSE
, /* pc_relative */
971 complain_overflow_bitfield
, /* complain_on_overflow */
972 bfd_elf_generic_reloc
, /* special_function */
973 "TPREL64", /* name */
974 FALSE
, /* partial_inplace */
975 MINUS_ONE
, /* src_mask */
976 MINUS_ONE
, /* dst_mask */
977 FALSE
), /* pcrel_offset */
979 /* The high 16 bits of the displacement from TP to the target. */
980 HOWTO (R_ALPHA_TPRELHI
, /* type */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
984 FALSE
, /* pc_relative */
986 complain_overflow_signed
, /* complain_on_overflow */
987 bfd_elf_generic_reloc
, /* special_function */
988 "TPRELHI", /* name */
989 FALSE
, /* partial_inplace */
990 0xffff, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE
), /* pcrel_offset */
994 /* The low 16 bits of the displacement from TP to the target. */
995 HOWTO (R_ALPHA_TPRELLO
, /* type */
997 1, /* size (0 = byte, 1 = short, 2 = long) */
999 FALSE
, /* pc_relative */
1001 complain_overflow_dont
, /* complain_on_overflow */
1002 bfd_elf_generic_reloc
, /* special_function */
1003 "TPRELLO", /* name */
1004 FALSE
, /* partial_inplace */
1005 0xffff, /* src_mask */
1006 0xffff, /* dst_mask */
1007 FALSE
), /* pcrel_offset */
1009 /* A 16-bit displacement from TP to the target. */
1010 HOWTO (R_ALPHA_TPREL16
, /* type */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1014 FALSE
, /* pc_relative */
1016 complain_overflow_signed
, /* complain_on_overflow */
1017 bfd_elf_generic_reloc
, /* special_function */
1018 "TPREL16", /* name */
1019 FALSE
, /* partial_inplace */
1020 0xffff, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE
), /* pcrel_offset */
1025 /* A mapping from BFD reloc types to Alpha ELF reloc types. */
1027 struct elf_reloc_map
1029 bfd_reloc_code_real_type bfd_reloc_val
;
1033 static const struct elf_reloc_map elf64_alpha_reloc_map
[] =
1035 {BFD_RELOC_NONE
, R_ALPHA_NONE
},
1036 {BFD_RELOC_32
, R_ALPHA_REFLONG
},
1037 {BFD_RELOC_64
, R_ALPHA_REFQUAD
},
1038 {BFD_RELOC_CTOR
, R_ALPHA_REFQUAD
},
1039 {BFD_RELOC_GPREL32
, R_ALPHA_GPREL32
},
1040 {BFD_RELOC_ALPHA_ELF_LITERAL
, R_ALPHA_LITERAL
},
1041 {BFD_RELOC_ALPHA_LITUSE
, R_ALPHA_LITUSE
},
1042 {BFD_RELOC_ALPHA_GPDISP
, R_ALPHA_GPDISP
},
1043 {BFD_RELOC_23_PCREL_S2
, R_ALPHA_BRADDR
},
1044 {BFD_RELOC_ALPHA_HINT
, R_ALPHA_HINT
},
1045 {BFD_RELOC_16_PCREL
, R_ALPHA_SREL16
},
1046 {BFD_RELOC_32_PCREL
, R_ALPHA_SREL32
},
1047 {BFD_RELOC_64_PCREL
, R_ALPHA_SREL64
},
1048 {BFD_RELOC_ALPHA_GPREL_HI16
, R_ALPHA_GPRELHIGH
},
1049 {BFD_RELOC_ALPHA_GPREL_LO16
, R_ALPHA_GPRELLOW
},
1050 {BFD_RELOC_GPREL16
, R_ALPHA_GPREL16
},
1051 {BFD_RELOC_ALPHA_BRSGP
, R_ALPHA_BRSGP
},
1052 {BFD_RELOC_ALPHA_TLSGD
, R_ALPHA_TLSGD
},
1053 {BFD_RELOC_ALPHA_TLSLDM
, R_ALPHA_TLSLDM
},
1054 {BFD_RELOC_ALPHA_DTPMOD64
, R_ALPHA_DTPMOD64
},
1055 {BFD_RELOC_ALPHA_GOTDTPREL16
, R_ALPHA_GOTDTPREL
},
1056 {BFD_RELOC_ALPHA_DTPREL64
, R_ALPHA_DTPREL64
},
1057 {BFD_RELOC_ALPHA_DTPREL_HI16
, R_ALPHA_DTPRELHI
},
1058 {BFD_RELOC_ALPHA_DTPREL_LO16
, R_ALPHA_DTPRELLO
},
1059 {BFD_RELOC_ALPHA_DTPREL16
, R_ALPHA_DTPREL16
},
1060 {BFD_RELOC_ALPHA_GOTTPREL16
, R_ALPHA_GOTTPREL
},
1061 {BFD_RELOC_ALPHA_TPREL64
, R_ALPHA_TPREL64
},
1062 {BFD_RELOC_ALPHA_TPREL_HI16
, R_ALPHA_TPRELHI
},
1063 {BFD_RELOC_ALPHA_TPREL_LO16
, R_ALPHA_TPRELLO
},
1064 {BFD_RELOC_ALPHA_TPREL16
, R_ALPHA_TPREL16
},
1067 /* Given a BFD reloc type, return a HOWTO structure. */
1069 static reloc_howto_type
*
1070 elf64_alpha_bfd_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1071 bfd_reloc_code_real_type code
)
1073 const struct elf_reloc_map
*i
, *e
;
1074 i
= e
= elf64_alpha_reloc_map
;
1075 e
+= sizeof (elf64_alpha_reloc_map
) / sizeof (struct elf_reloc_map
);
1078 if (i
->bfd_reloc_val
== code
)
1079 return &elf64_alpha_howto_table
[i
->elf_reloc_val
];
1084 static reloc_howto_type
*
1085 elf64_alpha_bfd_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1091 i
< (sizeof (elf64_alpha_howto_table
)
1092 / sizeof (elf64_alpha_howto_table
[0]));
1094 if (elf64_alpha_howto_table
[i
].name
!= NULL
1095 && strcasecmp (elf64_alpha_howto_table
[i
].name
, r_name
) == 0)
1096 return &elf64_alpha_howto_table
[i
];
1101 /* Given an Alpha ELF reloc type, fill in an arelent structure. */
1104 elf64_alpha_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
1105 Elf_Internal_Rela
*dst
)
1107 unsigned r_type
= ELF64_R_TYPE(dst
->r_info
);
1109 if (r_type
>= R_ALPHA_max
)
1111 /* xgettext:c-format */
1112 _bfd_error_handler (_("%B: unrecognised Alpha reloc number: %d"),
1114 bfd_set_error (bfd_error_bad_value
);
1115 r_type
= R_ALPHA_NONE
;
1117 cache_ptr
->howto
= &elf64_alpha_howto_table
[r_type
];
1120 /* These two relocations create a two-word entry in the got. */
1121 #define alpha_got_entry_size(r_type) \
1122 (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
1124 /* This is PT_TLS segment p_vaddr. */
1125 #define alpha_get_dtprel_base(info) \
1126 (elf_hash_table (info)->tls_sec->vma)
1128 /* Main program TLS (whose template starts at PT_TLS p_vaddr)
1129 is assigned offset round(16, PT_TLS p_align). */
1130 #define alpha_get_tprel_base(info) \
1131 (elf_hash_table (info)->tls_sec->vma \
1132 - align_power ((bfd_vma) 16, \
1133 elf_hash_table (info)->tls_sec->alignment_power))
1135 /* Handle an Alpha specific section when reading an object file. This
1136 is called when bfd_section_from_shdr finds a section with an unknown
1138 FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
1142 elf64_alpha_section_from_shdr (bfd
*abfd
,
1143 Elf_Internal_Shdr
*hdr
,
1149 /* There ought to be a place to keep ELF backend specific flags, but
1150 at the moment there isn't one. We just keep track of the
1151 sections by their name, instead. Fortunately, the ABI gives
1152 suggested names for all the MIPS specific sections, so we will
1153 probably get away with this. */
1154 switch (hdr
->sh_type
)
1156 case SHT_ALPHA_DEBUG
:
1157 if (strcmp (name
, ".mdebug") != 0)
1164 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1166 newsect
= hdr
->bfd_section
;
1168 if (hdr
->sh_type
== SHT_ALPHA_DEBUG
)
1170 if (! bfd_set_section_flags (abfd
, newsect
,
1171 (bfd_get_section_flags (abfd
, newsect
)
1179 /* Convert Alpha specific section flags to bfd internal section flags. */
1182 elf64_alpha_section_flags (flagword
*flags
, const Elf_Internal_Shdr
*hdr
)
1184 if (hdr
->sh_flags
& SHF_ALPHA_GPREL
)
1185 *flags
|= SEC_SMALL_DATA
;
1190 /* Set the correct type for an Alpha ELF section. We do this by the
1191 section name, which is a hack, but ought to work. */
1194 elf64_alpha_fake_sections (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*sec
)
1196 register const char *name
;
1198 name
= bfd_get_section_name (abfd
, sec
);
1200 if (strcmp (name
, ".mdebug") == 0)
1202 hdr
->sh_type
= SHT_ALPHA_DEBUG
;
1203 /* In a shared object on Irix 5.3, the .mdebug section has an
1204 entsize of 0. FIXME: Does this matter? */
1205 if ((abfd
->flags
& DYNAMIC
) != 0 )
1206 hdr
->sh_entsize
= 0;
1208 hdr
->sh_entsize
= 1;
1210 else if ((sec
->flags
& SEC_SMALL_DATA
)
1211 || strcmp (name
, ".sdata") == 0
1212 || strcmp (name
, ".sbss") == 0
1213 || strcmp (name
, ".lit4") == 0
1214 || strcmp (name
, ".lit8") == 0)
1215 hdr
->sh_flags
|= SHF_ALPHA_GPREL
;
1220 /* Hook called by the linker routine which adds symbols from an object
1221 file. We use it to put .comm items in .sbss, and not .bss. */
1224 elf64_alpha_add_symbol_hook (bfd
*abfd
, struct bfd_link_info
*info
,
1225 Elf_Internal_Sym
*sym
,
1226 const char **namep ATTRIBUTE_UNUSED
,
1227 flagword
*flagsp ATTRIBUTE_UNUSED
,
1228 asection
**secp
, bfd_vma
*valp
)
1230 if (sym
->st_shndx
== SHN_COMMON
1231 && !bfd_link_relocatable (info
)
1232 && sym
->st_size
<= elf_gp_size (abfd
))
1234 /* Common symbols less than or equal to -G nn bytes are
1235 automatically put into .sbss. */
1237 asection
*scomm
= bfd_get_section_by_name (abfd
, ".scommon");
1241 scomm
= bfd_make_section_with_flags (abfd
, ".scommon",
1244 | SEC_LINKER_CREATED
));
1250 *valp
= sym
->st_size
;
1256 /* Create the .got section. */
1259 elf64_alpha_create_got_section (bfd
*abfd
,
1260 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
1265 if (! is_alpha_elf (abfd
))
1268 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1269 | SEC_LINKER_CREATED
);
1270 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
1272 || !bfd_set_section_alignment (abfd
, s
, 3))
1275 alpha_elf_tdata (abfd
)->got
= s
;
1277 /* Make sure the object's gotobj is set to itself so that we default
1278 to every object with its own .got. We'll merge .gots later once
1279 we've collected each object's info. */
1280 alpha_elf_tdata (abfd
)->gotobj
= abfd
;
1285 /* Create all the dynamic sections. */
1288 elf64_alpha_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
1292 struct elf_link_hash_entry
*h
;
1294 if (! is_alpha_elf (abfd
))
1297 /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
1299 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1300 | SEC_LINKER_CREATED
1301 | (elf64_alpha_use_secureplt
? SEC_READONLY
: 0));
1302 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", flags
);
1303 elf_hash_table (info
)->splt
= s
;
1304 if (s
== NULL
|| ! bfd_set_section_alignment (abfd
, s
, 4))
1307 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
1309 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
1310 "_PROCEDURE_LINKAGE_TABLE_");
1311 elf_hash_table (info
)->hplt
= h
;
1315 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1316 | SEC_LINKER_CREATED
| SEC_READONLY
);
1317 s
= bfd_make_section_anyway_with_flags (abfd
, ".rela.plt", flags
);
1318 elf_hash_table (info
)->srelplt
= s
;
1319 if (s
== NULL
|| ! bfd_set_section_alignment (abfd
, s
, 3))
1322 if (elf64_alpha_use_secureplt
)
1324 flags
= SEC_ALLOC
| SEC_LINKER_CREATED
;
1325 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
1326 elf_hash_table (info
)->sgotplt
= s
;
1327 if (s
== NULL
|| ! bfd_set_section_alignment (abfd
, s
, 3))
1331 /* We may or may not have created a .got section for this object, but
1332 we definitely havn't done the rest of the work. */
1334 if (alpha_elf_tdata(abfd
)->gotobj
== NULL
)
1336 if (!elf64_alpha_create_got_section (abfd
, info
))
1340 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1341 | SEC_LINKER_CREATED
| SEC_READONLY
);
1342 s
= bfd_make_section_anyway_with_flags (abfd
, ".rela.got", flags
);
1343 elf_hash_table (info
)->srelgot
= s
;
1345 || !bfd_set_section_alignment (abfd
, s
, 3))
1348 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
1349 dynobj's .got section. We don't do this in the linker script
1350 because we don't want to define the symbol if we are not creating
1351 a global offset table. */
1352 h
= _bfd_elf_define_linkage_sym (abfd
, info
, alpha_elf_tdata(abfd
)->got
,
1353 "_GLOBAL_OFFSET_TABLE_");
1354 elf_hash_table (info
)->hgot
= h
;
1361 /* Read ECOFF debugging information from a .mdebug section into a
1362 ecoff_debug_info structure. */
1365 elf64_alpha_read_ecoff_info (bfd
*abfd
, asection
*section
,
1366 struct ecoff_debug_info
*debug
)
1369 const struct ecoff_debug_swap
*swap
;
1370 char *ext_hdr
= NULL
;
1372 swap
= get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
1373 memset (debug
, 0, sizeof (*debug
));
1375 ext_hdr
= (char *) bfd_malloc (swap
->external_hdr_size
);
1376 if (ext_hdr
== NULL
&& swap
->external_hdr_size
!= 0)
1379 if (! bfd_get_section_contents (abfd
, section
, ext_hdr
, (file_ptr
) 0,
1380 swap
->external_hdr_size
))
1383 symhdr
= &debug
->symbolic_header
;
1384 (*swap
->swap_hdr_in
) (abfd
, ext_hdr
, symhdr
);
1386 /* The symbolic header contains absolute file offsets and sizes to
1388 #define READ(ptr, offset, count, size, type) \
1389 if (symhdr->count == 0) \
1390 debug->ptr = NULL; \
1393 bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
1394 debug->ptr = (type) bfd_malloc (amt); \
1395 if (debug->ptr == NULL) \
1396 goto error_return; \
1397 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
1398 || bfd_bread (debug->ptr, amt, abfd) != amt) \
1399 goto error_return; \
1402 READ (line
, cbLineOffset
, cbLine
, sizeof (unsigned char), unsigned char *);
1403 READ (external_dnr
, cbDnOffset
, idnMax
, swap
->external_dnr_size
, void *);
1404 READ (external_pdr
, cbPdOffset
, ipdMax
, swap
->external_pdr_size
, void *);
1405 READ (external_sym
, cbSymOffset
, isymMax
, swap
->external_sym_size
, void *);
1406 READ (external_opt
, cbOptOffset
, ioptMax
, swap
->external_opt_size
, void *);
1407 READ (external_aux
, cbAuxOffset
, iauxMax
, sizeof (union aux_ext
),
1409 READ (ss
, cbSsOffset
, issMax
, sizeof (char), char *);
1410 READ (ssext
, cbSsExtOffset
, issExtMax
, sizeof (char), char *);
1411 READ (external_fdr
, cbFdOffset
, ifdMax
, swap
->external_fdr_size
, void *);
1412 READ (external_rfd
, cbRfdOffset
, crfd
, swap
->external_rfd_size
, void *);
1413 READ (external_ext
, cbExtOffset
, iextMax
, swap
->external_ext_size
, void *);
1421 if (ext_hdr
!= NULL
)
1423 if (debug
->line
!= NULL
)
1425 if (debug
->external_dnr
!= NULL
)
1426 free (debug
->external_dnr
);
1427 if (debug
->external_pdr
!= NULL
)
1428 free (debug
->external_pdr
);
1429 if (debug
->external_sym
!= NULL
)
1430 free (debug
->external_sym
);
1431 if (debug
->external_opt
!= NULL
)
1432 free (debug
->external_opt
);
1433 if (debug
->external_aux
!= NULL
)
1434 free (debug
->external_aux
);
1435 if (debug
->ss
!= NULL
)
1437 if (debug
->ssext
!= NULL
)
1438 free (debug
->ssext
);
1439 if (debug
->external_fdr
!= NULL
)
1440 free (debug
->external_fdr
);
1441 if (debug
->external_rfd
!= NULL
)
1442 free (debug
->external_rfd
);
1443 if (debug
->external_ext
!= NULL
)
1444 free (debug
->external_ext
);
1448 /* Alpha ELF local labels start with '$'. */
1451 elf64_alpha_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
1453 return name
[0] == '$';
1457 elf64_alpha_find_nearest_line (bfd
*abfd
, asymbol
**symbols
,
1458 asection
*section
, bfd_vma offset
,
1459 const char **filename_ptr
,
1460 const char **functionname_ptr
,
1461 unsigned int *line_ptr
,
1462 unsigned int *discriminator_ptr
)
1466 if (_bfd_dwarf2_find_nearest_line (abfd
, symbols
, NULL
, section
, offset
,
1467 filename_ptr
, functionname_ptr
,
1468 line_ptr
, discriminator_ptr
,
1469 dwarf_debug_sections
, 0,
1470 &elf_tdata (abfd
)->dwarf2_find_line_info
))
1473 msec
= bfd_get_section_by_name (abfd
, ".mdebug");
1477 struct alpha_elf_find_line
*fi
;
1478 const struct ecoff_debug_swap
* const swap
=
1479 get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
1481 /* If we are called during a link, alpha_elf_final_link may have
1482 cleared the SEC_HAS_CONTENTS field. We force it back on here
1483 if appropriate (which it normally will be). */
1484 origflags
= msec
->flags
;
1485 if (elf_section_data (msec
)->this_hdr
.sh_type
!= SHT_NOBITS
)
1486 msec
->flags
|= SEC_HAS_CONTENTS
;
1488 fi
= alpha_elf_tdata (abfd
)->find_line_info
;
1491 bfd_size_type external_fdr_size
;
1494 struct fdr
*fdr_ptr
;
1495 bfd_size_type amt
= sizeof (struct alpha_elf_find_line
);
1497 fi
= (struct alpha_elf_find_line
*) bfd_zalloc (abfd
, amt
);
1500 msec
->flags
= origflags
;
1504 if (!elf64_alpha_read_ecoff_info (abfd
, msec
, &fi
->d
))
1506 msec
->flags
= origflags
;
1510 /* Swap in the FDR information. */
1511 amt
= fi
->d
.symbolic_header
.ifdMax
* sizeof (struct fdr
);
1512 fi
->d
.fdr
= (struct fdr
*) bfd_alloc (abfd
, amt
);
1513 if (fi
->d
.fdr
== NULL
)
1515 msec
->flags
= origflags
;
1518 external_fdr_size
= swap
->external_fdr_size
;
1519 fdr_ptr
= fi
->d
.fdr
;
1520 fraw_src
= (char *) fi
->d
.external_fdr
;
1521 fraw_end
= (fraw_src
1522 + fi
->d
.symbolic_header
.ifdMax
* external_fdr_size
);
1523 for (; fraw_src
< fraw_end
; fraw_src
+= external_fdr_size
, fdr_ptr
++)
1524 (*swap
->swap_fdr_in
) (abfd
, fraw_src
, fdr_ptr
);
1526 alpha_elf_tdata (abfd
)->find_line_info
= fi
;
1528 /* Note that we don't bother to ever free this information.
1529 find_nearest_line is either called all the time, as in
1530 objdump -l, so the information should be saved, or it is
1531 rarely called, as in ld error messages, so the memory
1532 wasted is unimportant. Still, it would probably be a
1533 good idea for free_cached_info to throw it away. */
1536 if (_bfd_ecoff_locate_line (abfd
, section
, offset
, &fi
->d
, swap
,
1537 &fi
->i
, filename_ptr
, functionname_ptr
,
1540 msec
->flags
= origflags
;
1544 msec
->flags
= origflags
;
1547 /* Fall back on the generic ELF find_nearest_line routine. */
1549 return _bfd_elf_find_nearest_line (abfd
, symbols
, section
, offset
,
1550 filename_ptr
, functionname_ptr
,
1551 line_ptr
, discriminator_ptr
);
1554 /* Structure used to pass information to alpha_elf_output_extsym. */
1559 struct bfd_link_info
*info
;
1560 struct ecoff_debug_info
*debug
;
1561 const struct ecoff_debug_swap
*swap
;
1566 elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry
*h
, void * data
)
1568 struct extsym_info
*einfo
= (struct extsym_info
*) data
;
1570 asection
*sec
, *output_section
;
1572 if (h
->root
.indx
== -2)
1574 else if ((h
->root
.def_dynamic
1575 || h
->root
.ref_dynamic
1576 || h
->root
.root
.type
== bfd_link_hash_new
)
1577 && !h
->root
.def_regular
1578 && !h
->root
.ref_regular
)
1580 else if (einfo
->info
->strip
== strip_all
1581 || (einfo
->info
->strip
== strip_some
1582 && bfd_hash_lookup (einfo
->info
->keep_hash
,
1583 h
->root
.root
.root
.string
,
1584 FALSE
, FALSE
) == NULL
))
1592 if (h
->esym
.ifd
== -2)
1595 h
->esym
.cobol_main
= 0;
1596 h
->esym
.weakext
= 0;
1597 h
->esym
.reserved
= 0;
1598 h
->esym
.ifd
= ifdNil
;
1599 h
->esym
.asym
.value
= 0;
1600 h
->esym
.asym
.st
= stGlobal
;
1602 if (h
->root
.root
.type
!= bfd_link_hash_defined
1603 && h
->root
.root
.type
!= bfd_link_hash_defweak
)
1604 h
->esym
.asym
.sc
= scAbs
;
1609 sec
= h
->root
.root
.u
.def
.section
;
1610 output_section
= sec
->output_section
;
1612 /* When making a shared library and symbol h is the one from
1613 the another shared library, OUTPUT_SECTION may be null. */
1614 if (output_section
== NULL
)
1615 h
->esym
.asym
.sc
= scUndefined
;
1618 name
= bfd_section_name (output_section
->owner
, output_section
);
1620 if (strcmp (name
, ".text") == 0)
1621 h
->esym
.asym
.sc
= scText
;
1622 else if (strcmp (name
, ".data") == 0)
1623 h
->esym
.asym
.sc
= scData
;
1624 else if (strcmp (name
, ".sdata") == 0)
1625 h
->esym
.asym
.sc
= scSData
;
1626 else if (strcmp (name
, ".rodata") == 0
1627 || strcmp (name
, ".rdata") == 0)
1628 h
->esym
.asym
.sc
= scRData
;
1629 else if (strcmp (name
, ".bss") == 0)
1630 h
->esym
.asym
.sc
= scBss
;
1631 else if (strcmp (name
, ".sbss") == 0)
1632 h
->esym
.asym
.sc
= scSBss
;
1633 else if (strcmp (name
, ".init") == 0)
1634 h
->esym
.asym
.sc
= scInit
;
1635 else if (strcmp (name
, ".fini") == 0)
1636 h
->esym
.asym
.sc
= scFini
;
1638 h
->esym
.asym
.sc
= scAbs
;
1642 h
->esym
.asym
.reserved
= 0;
1643 h
->esym
.asym
.index
= indexNil
;
1646 if (h
->root
.root
.type
== bfd_link_hash_common
)
1647 h
->esym
.asym
.value
= h
->root
.root
.u
.c
.size
;
1648 else if (h
->root
.root
.type
== bfd_link_hash_defined
1649 || h
->root
.root
.type
== bfd_link_hash_defweak
)
1651 if (h
->esym
.asym
.sc
== scCommon
)
1652 h
->esym
.asym
.sc
= scBss
;
1653 else if (h
->esym
.asym
.sc
== scSCommon
)
1654 h
->esym
.asym
.sc
= scSBss
;
1656 sec
= h
->root
.root
.u
.def
.section
;
1657 output_section
= sec
->output_section
;
1658 if (output_section
!= NULL
)
1659 h
->esym
.asym
.value
= (h
->root
.root
.u
.def
.value
1660 + sec
->output_offset
1661 + output_section
->vma
);
1663 h
->esym
.asym
.value
= 0;
1666 if (! bfd_ecoff_debug_one_external (einfo
->abfd
, einfo
->debug
, einfo
->swap
,
1667 h
->root
.root
.root
.string
,
1670 einfo
->failed
= TRUE
;
1677 /* Search for and possibly create a got entry. */
1679 static struct alpha_elf_got_entry
*
1680 get_got_entry (bfd
*abfd
, struct alpha_elf_link_hash_entry
*h
,
1681 unsigned long r_type
, unsigned long r_symndx
,
1684 struct alpha_elf_got_entry
*gotent
;
1685 struct alpha_elf_got_entry
**slot
;
1688 slot
= &h
->got_entries
;
1691 /* This is a local .got entry -- record for merge. */
1693 struct alpha_elf_got_entry
**local_got_entries
;
1695 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
1696 if (!local_got_entries
)
1699 Elf_Internal_Shdr
*symtab_hdr
;
1701 symtab_hdr
= &elf_tdata(abfd
)->symtab_hdr
;
1702 size
= symtab_hdr
->sh_info
;
1703 size
*= sizeof (struct alpha_elf_got_entry
*);
1706 = (struct alpha_elf_got_entry
**) bfd_zalloc (abfd
, size
);
1707 if (!local_got_entries
)
1710 alpha_elf_tdata (abfd
)->local_got_entries
= local_got_entries
;
1713 slot
= &local_got_entries
[r_symndx
];
1716 for (gotent
= *slot
; gotent
; gotent
= gotent
->next
)
1717 if (gotent
->gotobj
== abfd
1718 && gotent
->reloc_type
== r_type
1719 && gotent
->addend
== r_addend
)
1727 amt
= sizeof (struct alpha_elf_got_entry
);
1728 gotent
= (struct alpha_elf_got_entry
*) bfd_alloc (abfd
, amt
);
1732 gotent
->gotobj
= abfd
;
1733 gotent
->addend
= r_addend
;
1734 gotent
->got_offset
= -1;
1735 gotent
->plt_offset
= -1;
1736 gotent
->use_count
= 1;
1737 gotent
->reloc_type
= r_type
;
1738 gotent
->reloc_done
= 0;
1739 gotent
->reloc_xlated
= 0;
1741 gotent
->next
= *slot
;
1744 entry_size
= alpha_got_entry_size (r_type
);
1745 alpha_elf_tdata (abfd
)->total_got_size
+= entry_size
;
1747 alpha_elf_tdata(abfd
)->local_got_size
+= entry_size
;
1750 gotent
->use_count
+= 1;
1756 elf64_alpha_want_plt (struct alpha_elf_link_hash_entry
*ah
)
1758 return ((ah
->root
.type
== STT_FUNC
1759 || ah
->root
.root
.type
== bfd_link_hash_undefweak
1760 || ah
->root
.root
.type
== bfd_link_hash_undefined
)
1761 && (ah
->flags
& ALPHA_ELF_LINK_HASH_LU_PLT
) != 0
1762 && (ah
->flags
& ~ALPHA_ELF_LINK_HASH_LU_PLT
) == 0);
1765 /* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset.
1766 Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE
1767 as is. On the other hand, elf-eh-frame.c processing requires .eh_frame
1768 relocs to be sorted. */
1771 elf64_alpha_sort_relocs_p (asection
*sec
)
1773 return (sec
->flags
& SEC_CODE
) == 0;
1777 /* Handle dynamic relocations when doing an Alpha ELF link. */
1780 elf64_alpha_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1781 asection
*sec
, const Elf_Internal_Rela
*relocs
)
1785 Elf_Internal_Shdr
*symtab_hdr
;
1786 struct alpha_elf_link_hash_entry
**sym_hashes
;
1787 const Elf_Internal_Rela
*rel
, *relend
;
1790 if (bfd_link_relocatable (info
))
1793 /* Don't do anything special with non-loaded, non-alloced sections.
1794 In particular, any relocs in such sections should not affect GOT
1795 and PLT reference counting (ie. we don't allow them to create GOT
1796 or PLT entries), there's no possibility or desire to optimize TLS
1797 relocs, and there's not much point in propagating relocs to shared
1798 libs that the dynamic linker won't relocate. */
1799 if ((sec
->flags
& SEC_ALLOC
) == 0)
1802 BFD_ASSERT (is_alpha_elf (abfd
));
1804 dynobj
= elf_hash_table (info
)->dynobj
;
1806 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1809 symtab_hdr
= &elf_symtab_hdr (abfd
);
1810 sym_hashes
= alpha_elf_sym_hashes (abfd
);
1812 relend
= relocs
+ sec
->reloc_count
;
1813 for (rel
= relocs
; rel
< relend
; ++rel
)
1821 unsigned long r_symndx
, r_type
;
1822 struct alpha_elf_link_hash_entry
*h
;
1823 unsigned int gotent_flags
;
1824 bfd_boolean maybe_dynamic
;
1828 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1829 if (r_symndx
< symtab_hdr
->sh_info
)
1833 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1835 while (h
->root
.root
.type
== bfd_link_hash_indirect
1836 || h
->root
.root
.type
== bfd_link_hash_warning
)
1837 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
1839 /* PR15323, ref flags aren't set for references in the same
1841 h
->root
.root
.non_ir_ref
= 1;
1842 h
->root
.ref_regular
= 1;
1845 /* We can only get preliminary data on whether a symbol is
1846 locally or externally defined, as not all of the input files
1847 have yet been processed. Do something with what we know, as
1848 this may help reduce memory usage and processing time later. */
1849 maybe_dynamic
= FALSE
;
1850 if (h
&& ((bfd_link_pic (info
)
1852 || info
->unresolved_syms_in_shared_libs
== RM_IGNORE
))
1853 || !h
->root
.def_regular
1854 || h
->root
.root
.type
== bfd_link_hash_defweak
))
1855 maybe_dynamic
= TRUE
;
1859 r_type
= ELF64_R_TYPE (rel
->r_info
);
1860 addend
= rel
->r_addend
;
1864 case R_ALPHA_LITERAL
:
1865 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1867 /* Remember how this literal is used from its LITUSEs.
1868 This will be important when it comes to decide if we can
1869 create a .plt entry for a function symbol. */
1870 while (++rel
< relend
&& ELF64_R_TYPE (rel
->r_info
) == R_ALPHA_LITUSE
)
1871 if (rel
->r_addend
>= 1 && rel
->r_addend
<= 6)
1872 gotent_flags
|= 1 << rel
->r_addend
;
1875 /* No LITUSEs -- presumably the address is used somehow. */
1876 if (gotent_flags
== 0)
1877 gotent_flags
= ALPHA_ELF_LINK_HASH_LU_ADDR
;
1880 case R_ALPHA_GPDISP
:
1881 case R_ALPHA_GPREL16
:
1882 case R_ALPHA_GPREL32
:
1883 case R_ALPHA_GPRELHIGH
:
1884 case R_ALPHA_GPRELLOW
:
1889 case R_ALPHA_REFLONG
:
1890 case R_ALPHA_REFQUAD
:
1891 if (bfd_link_pic (info
) || maybe_dynamic
)
1895 case R_ALPHA_TLSLDM
:
1896 /* The symbol for a TLSLDM reloc is ignored. Collapse the
1897 reloc to the STN_UNDEF (0) symbol so that they all match. */
1898 r_symndx
= STN_UNDEF
;
1900 maybe_dynamic
= FALSE
;
1904 case R_ALPHA_GOTDTPREL
:
1905 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1908 case R_ALPHA_GOTTPREL
:
1909 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1910 gotent_flags
= ALPHA_ELF_LINK_HASH_TLS_IE
;
1911 if (bfd_link_pic (info
))
1912 info
->flags
|= DF_STATIC_TLS
;
1915 case R_ALPHA_TPREL64
:
1916 if (bfd_link_dll (info
))
1918 info
->flags
|= DF_STATIC_TLS
;
1921 else if (maybe_dynamic
)
1926 if (need
& NEED_GOT
)
1928 if (alpha_elf_tdata(abfd
)->gotobj
== NULL
)
1930 if (!elf64_alpha_create_got_section (abfd
, info
))
1935 if (need
& NEED_GOT_ENTRY
)
1937 struct alpha_elf_got_entry
*gotent
;
1939 gotent
= get_got_entry (abfd
, h
, r_type
, r_symndx
, addend
);
1945 gotent
->flags
|= gotent_flags
;
1948 gotent_flags
|= h
->flags
;
1949 h
->flags
= gotent_flags
;
1951 /* Make a guess as to whether a .plt entry is needed. */
1952 /* ??? It appears that we won't make it into
1953 adjust_dynamic_symbol for symbols that remain
1954 totally undefined. Copying this check here means
1955 we can create a plt entry for them too. */
1957 = (maybe_dynamic
&& elf64_alpha_want_plt (h
));
1962 if (need
& NEED_DYNREL
)
1964 /* We need to create the section here now whether we eventually
1965 use it or not so that it gets mapped to an output section by
1966 the linker. If not used, we'll kill it in size_dynamic_sections. */
1969 sreloc
= _bfd_elf_make_dynamic_reloc_section
1970 (sec
, dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1978 /* Since we havn't seen all of the input symbols yet, we
1979 don't know whether we'll actually need a dynamic relocation
1980 entry for this reloc. So make a record of it. Once we
1981 find out if this thing needs dynamic relocation we'll
1982 expand the relocation sections by the appropriate amount. */
1984 struct alpha_elf_reloc_entry
*rent
;
1986 for (rent
= h
->reloc_entries
; rent
; rent
= rent
->next
)
1987 if (rent
->rtype
== r_type
&& rent
->srel
== sreloc
)
1992 amt
= sizeof (struct alpha_elf_reloc_entry
);
1993 rent
= (struct alpha_elf_reloc_entry
*) bfd_alloc (abfd
, amt
);
1997 rent
->srel
= sreloc
;
1998 rent
->rtype
= r_type
;
2000 rent
->reltext
= (sec
->flags
& SEC_READONLY
) != 0;
2002 rent
->next
= h
->reloc_entries
;
2003 h
->reloc_entries
= rent
;
2008 else if (bfd_link_pic (info
))
2010 /* If this is a shared library, and the section is to be
2011 loaded into memory, we need a RELATIVE reloc. */
2012 sreloc
->size
+= sizeof (Elf64_External_Rela
);
2013 if (sec
->flags
& SEC_READONLY
)
2014 info
->flags
|= DF_TEXTREL
;
2022 /* Return the section that should be marked against GC for a given
2026 elf64_alpha_gc_mark_hook (asection
*sec
, struct bfd_link_info
*info
,
2027 Elf_Internal_Rela
*rel
,
2028 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
)
2030 /* These relocations don't really reference a symbol. Instead we store
2031 extra data in their addend slot. Ignore the symbol. */
2032 switch (ELF64_R_TYPE (rel
->r_info
))
2034 case R_ALPHA_LITUSE
:
2035 case R_ALPHA_GPDISP
:
2040 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2043 /* Update the got entry reference counts for the section being removed. */
2046 elf64_alpha_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
2047 asection
*sec
, const Elf_Internal_Rela
*relocs
)
2049 Elf_Internal_Shdr
*symtab_hdr
;
2050 struct alpha_elf_link_hash_entry
**sym_hashes
;
2051 const Elf_Internal_Rela
*rel
, *relend
;
2053 if (bfd_link_relocatable (info
))
2056 symtab_hdr
= &elf_symtab_hdr (abfd
);
2057 sym_hashes
= alpha_elf_sym_hashes (abfd
);
2059 relend
= relocs
+ sec
->reloc_count
;
2060 for (rel
= relocs
; rel
< relend
; rel
++)
2062 unsigned long r_symndx
, r_type
;
2063 struct alpha_elf_link_hash_entry
*h
= NULL
;
2064 struct alpha_elf_got_entry
*gotent
;
2066 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2067 if (r_symndx
>= symtab_hdr
->sh_info
)
2069 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2070 while (h
->root
.root
.type
== bfd_link_hash_indirect
2071 || h
->root
.root
.type
== bfd_link_hash_warning
)
2072 h
= (struct alpha_elf_link_hash_entry
*) h
->root
.root
.u
.i
.link
;
2075 r_type
= ELF64_R_TYPE (rel
->r_info
);
2078 case R_ALPHA_LITERAL
:
2079 /* ??? Ignore re-computation of gotent_flags. We're not
2080 carrying a use-count for each bit in that mask. */
2083 case R_ALPHA_GOTDTPREL
:
2084 case R_ALPHA_GOTTPREL
:
2085 /* Fetch the got entry from the tables. */
2086 gotent
= get_got_entry (abfd
, h
, r_type
, r_symndx
, rel
->r_addend
);
2088 /* The got entry *must* exist, since we should have created it
2089 before during check_relocs. Also note that get_got_entry
2090 assumed this was going to be another use, and so incremented
2091 the use count again. Thus the use count must be at least the
2092 one real use and the "use" we just added. */
2093 if (gotent
== NULL
|| gotent
->use_count
< 2)
2098 gotent
->use_count
-= 2;
2109 /* Adjust a symbol defined by a dynamic object and referenced by a
2110 regular object. The current definition is in some section of the
2111 dynamic object, but we're not including those sections. We have to
2112 change the definition to something the rest of the link can
2116 elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2117 struct elf_link_hash_entry
*h
)
2121 struct alpha_elf_link_hash_entry
*ah
;
2123 dynobj
= elf_hash_table(info
)->dynobj
;
2124 ah
= (struct alpha_elf_link_hash_entry
*)h
;
2126 /* Now that we've seen all of the input symbols, finalize our decision
2127 about whether this symbol should get a .plt entry. Irritatingly, it
2128 is common for folk to leave undefined symbols in shared libraries,
2129 and they still expect lazy binding; accept undefined symbols in lieu
2131 if (alpha_elf_dynamic_symbol_p (h
, info
) && elf64_alpha_want_plt (ah
))
2133 h
->needs_plt
= TRUE
;
2135 s
= elf_hash_table(info
)->splt
;
2136 if (!s
&& !elf64_alpha_create_dynamic_sections (dynobj
, info
))
2139 /* We need one plt entry per got subsection. Delay allocation of
2140 the actual plt entries until size_plt_section, called from
2141 size_dynamic_sections or during relaxation. */
2146 h
->needs_plt
= FALSE
;
2148 /* If this is a weak symbol, and there is a real definition, the
2149 processor independent code will have arranged for us to see the
2150 real definition first, and we can just use the same value. */
2151 if (h
->u
.weakdef
!= NULL
)
2153 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2154 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2155 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2156 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2160 /* This is a reference to a symbol defined by a dynamic object which
2161 is not a function. The Alpha, since it uses .got entries for all
2162 symbols even in regular objects, does not need the hackery of a
2163 .dynbss section and COPY dynamic relocations. */
2168 /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
2171 elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry
*h
,
2172 const Elf_Internal_Sym
*isym
,
2173 bfd_boolean definition
,
2174 bfd_boolean dynamic
)
2176 if (!dynamic
&& definition
)
2177 h
->other
= ((h
->other
& ELF_ST_VISIBILITY (-1))
2178 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
2181 /* Symbol versioning can create new symbols, and make our old symbols
2182 indirect to the new ones. Consolidate the got and reloc information
2183 in these situations. */
2186 elf64_alpha_copy_indirect_symbol (struct bfd_link_info
*info
,
2187 struct elf_link_hash_entry
*dir
,
2188 struct elf_link_hash_entry
*ind
)
2190 struct alpha_elf_link_hash_entry
*hi
2191 = (struct alpha_elf_link_hash_entry
*) ind
;
2192 struct alpha_elf_link_hash_entry
*hs
2193 = (struct alpha_elf_link_hash_entry
*) dir
;
2195 /* Do the merging in the superclass. */
2196 _bfd_elf_link_hash_copy_indirect(info
, dir
, ind
);
2198 /* Merge the flags. Whee. */
2199 hs
->flags
|= hi
->flags
;
2201 /* ??? It's unclear to me what's really supposed to happen when
2202 "merging" defweak and defined symbols, given that we don't
2203 actually throw away the defweak. This more-or-less copies
2204 the logic related to got and plt entries in the superclass. */
2205 if (ind
->root
.type
!= bfd_link_hash_indirect
)
2208 /* Merge the .got entries. Cannibalize the old symbol's list in
2209 doing so, since we don't need it anymore. */
2211 if (hs
->got_entries
== NULL
)
2212 hs
->got_entries
= hi
->got_entries
;
2215 struct alpha_elf_got_entry
*gi
, *gs
, *gin
, *gsh
;
2217 gsh
= hs
->got_entries
;
2218 for (gi
= hi
->got_entries
; gi
; gi
= gin
)
2221 for (gs
= gsh
; gs
; gs
= gs
->next
)
2222 if (gi
->gotobj
== gs
->gotobj
2223 && gi
->reloc_type
== gs
->reloc_type
2224 && gi
->addend
== gs
->addend
)
2226 gs
->use_count
+= gi
->use_count
;
2229 gi
->next
= hs
->got_entries
;
2230 hs
->got_entries
= gi
;
2234 hi
->got_entries
= NULL
;
2236 /* And similar for the reloc entries. */
2238 if (hs
->reloc_entries
== NULL
)
2239 hs
->reloc_entries
= hi
->reloc_entries
;
2242 struct alpha_elf_reloc_entry
*ri
, *rs
, *rin
, *rsh
;
2244 rsh
= hs
->reloc_entries
;
2245 for (ri
= hi
->reloc_entries
; ri
; ri
= rin
)
2248 for (rs
= rsh
; rs
; rs
= rs
->next
)
2249 if (ri
->rtype
== rs
->rtype
&& ri
->srel
== rs
->srel
)
2251 rs
->count
+= ri
->count
;
2254 ri
->next
= hs
->reloc_entries
;
2255 hs
->reloc_entries
= ri
;
2259 hi
->reloc_entries
= NULL
;
2262 /* Is it possible to merge two object file's .got tables? */
2265 elf64_alpha_can_merge_gots (bfd
*a
, bfd
*b
)
2267 int total
= alpha_elf_tdata (a
)->total_got_size
;
2270 /* Trivial quick fallout test. */
2271 if (total
+ alpha_elf_tdata (b
)->total_got_size
<= MAX_GOT_SIZE
)
2274 /* By their nature, local .got entries cannot be merged. */
2275 if ((total
+= alpha_elf_tdata (b
)->local_got_size
) > MAX_GOT_SIZE
)
2278 /* Failing the common trivial comparison, we must effectively
2279 perform the merge. Not actually performing the merge means that
2280 we don't have to store undo information in case we fail. */
2281 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2283 struct alpha_elf_link_hash_entry
**hashes
= alpha_elf_sym_hashes (bsub
);
2284 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2287 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2288 for (i
= 0; i
< n
; ++i
)
2290 struct alpha_elf_got_entry
*ae
, *be
;
2291 struct alpha_elf_link_hash_entry
*h
;
2294 while (h
->root
.root
.type
== bfd_link_hash_indirect
2295 || h
->root
.root
.type
== bfd_link_hash_warning
)
2296 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2298 for (be
= h
->got_entries
; be
; be
= be
->next
)
2300 if (be
->use_count
== 0)
2302 if (be
->gotobj
!= b
)
2305 for (ae
= h
->got_entries
; ae
; ae
= ae
->next
)
2307 && ae
->reloc_type
== be
->reloc_type
2308 && ae
->addend
== be
->addend
)
2311 total
+= alpha_got_entry_size (be
->reloc_type
);
2312 if (total
> MAX_GOT_SIZE
)
2322 /* Actually merge two .got tables. */
2325 elf64_alpha_merge_gots (bfd
*a
, bfd
*b
)
2327 int total
= alpha_elf_tdata (a
)->total_got_size
;
2330 /* Remember local expansion. */
2332 int e
= alpha_elf_tdata (b
)->local_got_size
;
2334 alpha_elf_tdata (a
)->local_got_size
+= e
;
2337 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2339 struct alpha_elf_got_entry
**local_got_entries
;
2340 struct alpha_elf_link_hash_entry
**hashes
;
2341 Elf_Internal_Shdr
*symtab_hdr
;
2344 /* Let the local .got entries know they are part of a new subsegment. */
2345 local_got_entries
= alpha_elf_tdata (bsub
)->local_got_entries
;
2346 if (local_got_entries
)
2348 n
= elf_tdata (bsub
)->symtab_hdr
.sh_info
;
2349 for (i
= 0; i
< n
; ++i
)
2351 struct alpha_elf_got_entry
*ent
;
2352 for (ent
= local_got_entries
[i
]; ent
; ent
= ent
->next
)
2357 /* Merge the global .got entries. */
2358 hashes
= alpha_elf_sym_hashes (bsub
);
2359 symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2361 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2362 for (i
= 0; i
< n
; ++i
)
2364 struct alpha_elf_got_entry
*ae
, *be
, **pbe
, **start
;
2365 struct alpha_elf_link_hash_entry
*h
;
2368 while (h
->root
.root
.type
== bfd_link_hash_indirect
2369 || h
->root
.root
.type
== bfd_link_hash_warning
)
2370 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2372 pbe
= start
= &h
->got_entries
;
2373 while ((be
= *pbe
) != NULL
)
2375 if (be
->use_count
== 0)
2378 memset (be
, 0xa5, sizeof (*be
));
2381 if (be
->gotobj
!= b
)
2384 for (ae
= *start
; ae
; ae
= ae
->next
)
2386 && ae
->reloc_type
== be
->reloc_type
2387 && ae
->addend
== be
->addend
)
2389 ae
->flags
|= be
->flags
;
2390 ae
->use_count
+= be
->use_count
;
2392 memset (be
, 0xa5, sizeof (*be
));
2396 total
+= alpha_got_entry_size (be
->reloc_type
);
2404 alpha_elf_tdata (bsub
)->gotobj
= a
;
2406 alpha_elf_tdata (a
)->total_got_size
= total
;
2408 /* Merge the two in_got chains. */
2413 while ((next
= alpha_elf_tdata (bsub
)->in_got_link_next
) != NULL
)
2416 alpha_elf_tdata (bsub
)->in_got_link_next
= b
;
2420 /* Calculate the offsets for the got entries. */
2423 elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry
*h
,
2424 void * arg ATTRIBUTE_UNUSED
)
2426 struct alpha_elf_got_entry
*gotent
;
2428 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2429 if (gotent
->use_count
> 0)
2431 struct alpha_elf_obj_tdata
*td
;
2432 bfd_size_type
*plge
;
2434 td
= alpha_elf_tdata (gotent
->gotobj
);
2435 plge
= &td
->got
->size
;
2436 gotent
->got_offset
= *plge
;
2437 *plge
+= alpha_got_entry_size (gotent
->reloc_type
);
2444 elf64_alpha_calc_got_offsets (struct bfd_link_info
*info
)
2447 struct alpha_elf_link_hash_table
* htab
;
2449 htab
= alpha_elf_hash_table (info
);
2452 got_list
= htab
->got_list
;
2454 /* First, zero out the .got sizes, as we may be recalculating the
2455 .got after optimizing it. */
2456 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2457 alpha_elf_tdata(i
)->got
->size
= 0;
2459 /* Next, fill in the offsets for all the global entries. */
2460 alpha_elf_link_hash_traverse (htab
,
2461 elf64_alpha_calc_got_offsets_for_symbol
,
2464 /* Finally, fill in the offsets for the local entries. */
2465 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2467 bfd_size_type got_offset
= alpha_elf_tdata(i
)->got
->size
;
2470 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2472 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2475 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2476 if (!local_got_entries
)
2479 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2480 for (gotent
= local_got_entries
[k
]; gotent
; gotent
= gotent
->next
)
2481 if (gotent
->use_count
> 0)
2483 gotent
->got_offset
= got_offset
;
2484 got_offset
+= alpha_got_entry_size (gotent
->reloc_type
);
2488 alpha_elf_tdata(i
)->got
->size
= got_offset
;
2492 /* Constructs the gots. */
2495 elf64_alpha_size_got_sections (struct bfd_link_info
*info
,
2496 bfd_boolean may_merge
)
2498 bfd
*i
, *got_list
, *cur_got_obj
= NULL
;
2499 struct alpha_elf_link_hash_table
* htab
;
2501 htab
= alpha_elf_hash_table (info
);
2504 got_list
= htab
->got_list
;
2506 /* On the first time through, pretend we have an existing got list
2507 consisting of all of the input files. */
2508 if (got_list
== NULL
)
2510 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
2514 if (! is_alpha_elf (i
))
2517 this_got
= alpha_elf_tdata (i
)->gotobj
;
2518 if (this_got
== NULL
)
2521 /* We are assuming no merging has yet occurred. */
2522 BFD_ASSERT (this_got
== i
);
2524 if (alpha_elf_tdata (this_got
)->total_got_size
> MAX_GOT_SIZE
)
2526 /* Yikes! A single object file has too many entries. */
2528 /* xgettext:c-format */
2529 (_("%B: .got subsegment exceeds 64K (size %d)"),
2530 i
, alpha_elf_tdata (this_got
)->total_got_size
);
2534 if (got_list
== NULL
)
2535 got_list
= this_got
;
2537 alpha_elf_tdata(cur_got_obj
)->got_link_next
= this_got
;
2538 cur_got_obj
= this_got
;
2541 /* Strange degenerate case of no got references. */
2542 if (got_list
== NULL
)
2545 htab
->got_list
= got_list
;
2548 cur_got_obj
= got_list
;
2549 if (cur_got_obj
== NULL
)
2554 i
= alpha_elf_tdata(cur_got_obj
)->got_link_next
;
2557 if (elf64_alpha_can_merge_gots (cur_got_obj
, i
))
2559 elf64_alpha_merge_gots (cur_got_obj
, i
);
2561 alpha_elf_tdata(i
)->got
->size
= 0;
2562 i
= alpha_elf_tdata(i
)->got_link_next
;
2563 alpha_elf_tdata(cur_got_obj
)->got_link_next
= i
;
2568 i
= alpha_elf_tdata(i
)->got_link_next
;
2573 /* Once the gots have been merged, fill in the got offsets for
2574 everything therein. */
2575 elf64_alpha_calc_got_offsets (info
);
2581 elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry
*h
,
2584 asection
*splt
= (asection
*) data
;
2585 struct alpha_elf_got_entry
*gotent
;
2586 bfd_boolean saw_one
= FALSE
;
2588 /* If we didn't need an entry before, we still don't. */
2589 if (!h
->root
.needs_plt
)
2592 /* For each LITERAL got entry still in use, allocate a plt entry. */
2593 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2594 if (gotent
->reloc_type
== R_ALPHA_LITERAL
2595 && gotent
->use_count
> 0)
2597 if (splt
->size
== 0)
2598 splt
->size
= PLT_HEADER_SIZE
;
2599 gotent
->plt_offset
= splt
->size
;
2600 splt
->size
+= PLT_ENTRY_SIZE
;
2604 /* If there weren't any, there's no longer a need for the PLT entry. */
2606 h
->root
.needs_plt
= FALSE
;
2611 /* Called from relax_section to rebuild the PLT in light of potential changes
2612 in the function's status. */
2615 elf64_alpha_size_plt_section (struct bfd_link_info
*info
)
2617 asection
*splt
, *spltrel
, *sgotplt
;
2618 unsigned long entries
;
2619 struct alpha_elf_link_hash_table
* htab
;
2621 htab
= alpha_elf_hash_table (info
);
2625 splt
= elf_hash_table(info
)->splt
;
2631 alpha_elf_link_hash_traverse (htab
,
2632 elf64_alpha_size_plt_section_1
, splt
);
2634 /* Every plt entry requires a JMP_SLOT relocation. */
2635 spltrel
= elf_hash_table(info
)->srelplt
;
2639 if (elf64_alpha_use_secureplt
)
2640 entries
= (splt
->size
- NEW_PLT_HEADER_SIZE
) / NEW_PLT_ENTRY_SIZE
;
2642 entries
= (splt
->size
- OLD_PLT_HEADER_SIZE
) / OLD_PLT_ENTRY_SIZE
;
2644 spltrel
->size
= entries
* sizeof (Elf64_External_Rela
);
2646 /* When using the secureplt, we need two words somewhere in the data
2647 segment for the dynamic linker to tell us where to go. This is the
2648 entire contents of the .got.plt section. */
2649 if (elf64_alpha_use_secureplt
)
2651 sgotplt
= elf_hash_table(info
)->sgotplt
;
2652 sgotplt
->size
= entries
? 16 : 0;
2657 elf64_alpha_always_size_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2658 struct bfd_link_info
*info
)
2661 struct alpha_elf_link_hash_table
* htab
;
2663 if (bfd_link_relocatable (info
))
2666 htab
= alpha_elf_hash_table (info
);
2670 if (!elf64_alpha_size_got_sections (info
, TRUE
))
2673 /* Allocate space for all of the .got subsections. */
2675 for ( ; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2677 asection
*s
= alpha_elf_tdata(i
)->got
;
2680 s
->contents
= (bfd_byte
*) bfd_zalloc (i
, s
->size
);
2681 if (s
->contents
== NULL
)
2689 /* The number of dynamic relocations required by a static relocation. */
2692 alpha_dynamic_entries_for_reloc (int r_type
, int dynamic
, int shared
, int pie
)
2696 /* May appear in GOT entries. */
2698 return (dynamic
? 2 : shared
? 1 : 0);
2699 case R_ALPHA_TLSLDM
:
2701 case R_ALPHA_LITERAL
:
2702 return dynamic
|| shared
;
2703 case R_ALPHA_GOTTPREL
:
2704 return dynamic
|| (shared
&& !pie
);
2705 case R_ALPHA_GOTDTPREL
:
2708 /* May appear in data sections. */
2709 case R_ALPHA_REFLONG
:
2710 case R_ALPHA_REFQUAD
:
2711 return dynamic
|| shared
;
2712 case R_ALPHA_TPREL64
:
2713 return dynamic
|| (shared
&& !pie
);
2715 /* Everything else is illegal. We'll issue an error during
2716 relocate_section. */
2722 /* Work out the sizes of the dynamic relocation entries. */
2725 elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry
*h
,
2726 struct bfd_link_info
*info
)
2728 bfd_boolean dynamic
;
2729 struct alpha_elf_reloc_entry
*relent
;
2730 unsigned long entries
;
2732 /* If the symbol was defined as a common symbol in a regular object
2733 file, and there was no definition in any dynamic object, then the
2734 linker will have allocated space for the symbol in a common
2735 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
2736 set. This is done for dynamic symbols in
2737 elf_adjust_dynamic_symbol but this is not done for non-dynamic
2738 symbols, somehow. */
2739 if (!h
->root
.def_regular
2740 && h
->root
.ref_regular
2741 && !h
->root
.def_dynamic
2742 && (h
->root
.root
.type
== bfd_link_hash_defined
2743 || h
->root
.root
.type
== bfd_link_hash_defweak
)
2744 && !(h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
))
2745 h
->root
.def_regular
= 1;
2747 /* If the symbol is dynamic, we'll need all the relocations in their
2748 natural form. If this is a shared object, and it has been forced
2749 local, we'll need the same number of RELATIVE relocations. */
2750 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2752 /* If the symbol is a hidden undefined weak, then we never have any
2753 relocations. Avoid the loop which may want to add RELATIVE relocs
2754 based on bfd_link_pic (info). */
2755 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2758 for (relent
= h
->reloc_entries
; relent
; relent
= relent
->next
)
2760 entries
= alpha_dynamic_entries_for_reloc (relent
->rtype
, dynamic
,
2761 bfd_link_pic (info
),
2762 bfd_link_pie (info
));
2765 relent
->srel
->size
+=
2766 entries
* sizeof (Elf64_External_Rela
) * relent
->count
;
2767 if (relent
->reltext
)
2768 info
->flags
|= DT_TEXTREL
;
2775 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
2779 elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry
*h
,
2780 struct bfd_link_info
*info
)
2782 bfd_boolean dynamic
;
2783 struct alpha_elf_got_entry
*gotent
;
2784 unsigned long entries
;
2786 /* If we're using a plt for this symbol, then all of its relocations
2787 for its got entries go into .rela.plt. */
2788 if (h
->root
.needs_plt
)
2791 /* If the symbol is dynamic, we'll need all the relocations in their
2792 natural form. If this is a shared object, and it has been forced
2793 local, we'll need the same number of RELATIVE relocations. */
2794 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2796 /* If the symbol is a hidden undefined weak, then we never have any
2797 relocations. Avoid the loop which may want to add RELATIVE relocs
2798 based on bfd_link_pic (info). */
2799 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2803 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2804 if (gotent
->use_count
> 0)
2805 entries
+= alpha_dynamic_entries_for_reloc (gotent
->reloc_type
, dynamic
,
2806 bfd_link_pic (info
),
2807 bfd_link_pie (info
));
2811 asection
*srel
= elf_hash_table(info
)->srelgot
;
2812 BFD_ASSERT (srel
!= NULL
);
2813 srel
->size
+= sizeof (Elf64_External_Rela
) * entries
;
2819 /* Set the sizes of the dynamic relocation sections. */
2822 elf64_alpha_size_rela_got_section (struct bfd_link_info
*info
)
2824 unsigned long entries
;
2827 struct alpha_elf_link_hash_table
* htab
;
2829 htab
= alpha_elf_hash_table (info
);
2833 /* Shared libraries often require RELATIVE relocs, and some relocs
2834 require attention for the main application as well. */
2837 for (i
= htab
->got_list
;
2838 i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2842 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2844 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2847 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2848 if (!local_got_entries
)
2851 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2852 for (gotent
= local_got_entries
[k
];
2853 gotent
; gotent
= gotent
->next
)
2854 if (gotent
->use_count
> 0)
2855 entries
+= (alpha_dynamic_entries_for_reloc
2856 (gotent
->reloc_type
, 0, bfd_link_pic (info
),
2857 bfd_link_pie (info
)));
2861 srel
= elf_hash_table(info
)->srelgot
;
2864 BFD_ASSERT (entries
== 0);
2867 srel
->size
= sizeof (Elf64_External_Rela
) * entries
;
2869 /* Now do the non-local symbols. */
2870 alpha_elf_link_hash_traverse (htab
,
2871 elf64_alpha_size_rela_got_1
, info
);
2874 /* Set the sizes of the dynamic sections. */
2877 elf64_alpha_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2878 struct bfd_link_info
*info
)
2883 struct alpha_elf_link_hash_table
* htab
;
2885 htab
= alpha_elf_hash_table (info
);
2889 dynobj
= elf_hash_table(info
)->dynobj
;
2890 BFD_ASSERT(dynobj
!= NULL
);
2892 if (elf_hash_table (info
)->dynamic_sections_created
)
2894 /* Set the contents of the .interp section to the interpreter. */
2895 if (bfd_link_executable (info
) && !info
->nointerp
)
2897 s
= bfd_get_linker_section (dynobj
, ".interp");
2898 BFD_ASSERT (s
!= NULL
);
2899 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2900 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2903 /* Now that we've seen all of the input files, we can decide which
2904 symbols need dynamic relocation entries and which don't. We've
2905 collected information in check_relocs that we can now apply to
2906 size the dynamic relocation sections. */
2907 alpha_elf_link_hash_traverse (htab
,
2908 elf64_alpha_calc_dynrel_sizes
, info
);
2910 elf64_alpha_size_rela_got_section (info
);
2911 elf64_alpha_size_plt_section (info
);
2913 /* else we're not dynamic and by definition we don't need such things. */
2915 /* The check_relocs and adjust_dynamic_symbol entry points have
2916 determined the sizes of the various dynamic sections. Allocate
2919 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2923 if (!(s
->flags
& SEC_LINKER_CREATED
))
2926 /* It's OK to base decisions on the section name, because none
2927 of the dynobj section names depend upon the input files. */
2928 name
= bfd_get_section_name (dynobj
, s
);
2930 if (CONST_STRNEQ (name
, ".rela"))
2934 if (strcmp (name
, ".rela.plt") == 0)
2937 /* We use the reloc_count field as a counter if we need
2938 to copy relocs into the output file. */
2942 else if (! CONST_STRNEQ (name
, ".got")
2943 && strcmp (name
, ".plt") != 0
2944 && strcmp (name
, ".dynbss") != 0)
2946 /* It's not one of our dynamic sections, so don't allocate space. */
2952 /* If we don't need this section, strip it from the output file.
2953 This is to handle .rela.bss and .rela.plt. We must create it
2954 in create_dynamic_sections, because it must be created before
2955 the linker maps input sections to output sections. The
2956 linker does that before adjust_dynamic_symbol is called, and
2957 it is that function which decides whether anything needs to
2958 go into these sections. */
2959 if (!CONST_STRNEQ (name
, ".got"))
2960 s
->flags
|= SEC_EXCLUDE
;
2962 else if ((s
->flags
& SEC_HAS_CONTENTS
) != 0)
2964 /* Allocate memory for the section contents. */
2965 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2966 if (s
->contents
== NULL
)
2971 if (elf_hash_table (info
)->dynamic_sections_created
)
2973 /* Add some entries to the .dynamic section. We fill in the
2974 values later, in elf64_alpha_finish_dynamic_sections, but we
2975 must add the entries now so that we get the correct size for
2976 the .dynamic section. The DT_DEBUG entry is filled in by the
2977 dynamic linker and used by the debugger. */
2978 #define add_dynamic_entry(TAG, VAL) \
2979 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2981 if (bfd_link_executable (info
))
2983 if (!add_dynamic_entry (DT_DEBUG
, 0))
2989 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2990 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2991 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2992 || !add_dynamic_entry (DT_JMPREL
, 0))
2995 if (elf64_alpha_use_secureplt
2996 && !add_dynamic_entry (DT_ALPHA_PLTRO
, 1))
3000 if (!add_dynamic_entry (DT_RELA
, 0)
3001 || !add_dynamic_entry (DT_RELASZ
, 0)
3002 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
3005 if (info
->flags
& DF_TEXTREL
)
3007 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3011 #undef add_dynamic_entry
3016 /* These functions do relaxation for Alpha ELF.
3018 Currently I'm only handling what I can do with existing compiler
3019 and assembler support, which means no instructions are removed,
3020 though some may be nopped. At this time GCC does not emit enough
3021 information to do all of the relaxing that is possible. It will
3022 take some not small amount of work for that to happen.
3024 There are a couple of interesting papers that I once read on this
3025 subject, that I cannot find references to at the moment, that
3026 related to Alpha in particular. They are by David Wall, then of
3029 struct alpha_relax_info
3034 Elf_Internal_Shdr
*symtab_hdr
;
3035 Elf_Internal_Rela
*relocs
, *relend
;
3036 struct bfd_link_info
*link_info
;
3040 struct alpha_elf_link_hash_entry
*h
;
3041 struct alpha_elf_got_entry
**first_gotent
;
3042 struct alpha_elf_got_entry
*gotent
;
3043 bfd_boolean changed_contents
;
3044 bfd_boolean changed_relocs
;
3045 unsigned char other
;
3048 static Elf_Internal_Rela
*
3049 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela
*rel
,
3050 Elf_Internal_Rela
*relend
,
3051 bfd_vma offset
, int type
)
3053 while (rel
< relend
)
3055 if (rel
->r_offset
== offset
3056 && ELF64_R_TYPE (rel
->r_info
) == (unsigned int) type
)
3064 elf64_alpha_relax_got_load (struct alpha_relax_info
*info
, bfd_vma symval
,
3065 Elf_Internal_Rela
*irel
, unsigned long r_type
)
3068 bfd_signed_vma disp
;
3070 /* Get the instruction. */
3071 insn
= bfd_get_32 (info
->abfd
, info
->contents
+ irel
->r_offset
);
3073 if (insn
>> 26 != OP_LDQ
)
3075 reloc_howto_type
*howto
= elf64_alpha_howto_table
+ r_type
;
3077 /* xgettext:c-format */
3078 (_("%B: %A+0x%lx: warning: %s relocation against unexpected insn"),
3079 info
->abfd
, info
->sec
,
3080 (unsigned long) irel
->r_offset
, howto
->name
);
3084 /* Can't relax dynamic symbols. */
3085 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3088 /* Can't use local-exec relocations in shared libraries. */
3089 if (r_type
== R_ALPHA_GOTTPREL
3090 && bfd_link_dll (info
->link_info
))
3093 if (r_type
== R_ALPHA_LITERAL
)
3095 /* Look for nice constant addresses. This includes the not-uncommon
3096 special case of 0 for undefweak symbols. */
3097 if ((info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3098 || (!bfd_link_pic (info
->link_info
)
3099 && (symval
>= (bfd_vma
)-0x8000 || symval
< 0x8000)))
3102 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3103 insn
|= (symval
& 0xffff);
3104 r_type
= R_ALPHA_NONE
;
3108 /* We may only create GPREL relocs during the second pass. */
3109 if (info
->link_info
->relax_pass
== 0)
3112 disp
= symval
- info
->gp
;
3113 insn
= (OP_LDA
<< 26) | (insn
& 0x03ff0000);
3114 r_type
= R_ALPHA_GPREL16
;
3119 bfd_vma dtp_base
, tp_base
;
3121 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3122 dtp_base
= alpha_get_dtprel_base (info
->link_info
);
3123 tp_base
= alpha_get_tprel_base (info
->link_info
);
3124 disp
= symval
- (r_type
== R_ALPHA_GOTDTPREL
? dtp_base
: tp_base
);
3126 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3130 case R_ALPHA_GOTDTPREL
:
3131 r_type
= R_ALPHA_DTPREL16
;
3133 case R_ALPHA_GOTTPREL
:
3134 r_type
= R_ALPHA_TPREL16
;
3142 if (disp
< -0x8000 || disp
>= 0x8000)
3145 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, info
->contents
+ irel
->r_offset
);
3146 info
->changed_contents
= TRUE
;
3148 /* Reduce the use count on this got entry by one, possibly
3150 if (--info
->gotent
->use_count
== 0)
3152 int sz
= alpha_got_entry_size (r_type
);
3153 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3155 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3158 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3159 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
), r_type
);
3160 info
->changed_relocs
= TRUE
;
3162 /* ??? Search forward through this basic block looking for insns
3163 that use the target register. Stop after an insn modifying the
3164 register is seen, or after a branch or call.
3166 Any such memory load insn may be substituted by a load directly
3167 off the GP. This allows the memory load insn to be issued before
3168 the calculated GP register would otherwise be ready.
3170 Any such jsr insn can be replaced by a bsr if it is in range.
3172 This would mean that we'd have to _add_ relocations, the pain of
3173 which gives one pause. */
3179 elf64_alpha_relax_opt_call (struct alpha_relax_info
*info
, bfd_vma symval
)
3181 /* If the function has the same gp, and we can identify that the
3182 function does not use its function pointer, we can eliminate the
3185 /* If the symbol is marked NOPV, we are being told the function never
3186 needs its procedure value. */
3187 if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_NOPV
)
3190 /* If the symbol is marked STD_GP, we are being told the function does
3191 a normal ldgp in the first two words. */
3192 else if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_STD_GPLOAD
)
3195 /* Otherwise, we may be able to identify a GP load in the first two
3196 words, which we can then skip. */
3199 Elf_Internal_Rela
*tsec_relocs
, *tsec_relend
, *tsec_free
, *gpdisp
;
3202 /* Load the relocations from the section that the target symbol is in. */
3203 if (info
->sec
== info
->tsec
)
3205 tsec_relocs
= info
->relocs
;
3206 tsec_relend
= info
->relend
;
3211 tsec_relocs
= (_bfd_elf_link_read_relocs
3212 (info
->abfd
, info
->tsec
, NULL
,
3213 (Elf_Internal_Rela
*) NULL
,
3214 info
->link_info
->keep_memory
));
3215 if (tsec_relocs
== NULL
)
3217 tsec_relend
= tsec_relocs
+ info
->tsec
->reloc_count
;
3218 tsec_free
= (elf_section_data (info
->tsec
)->relocs
== tsec_relocs
3223 /* Recover the symbol's offset within the section. */
3224 ofs
= (symval
- info
->tsec
->output_section
->vma
3225 - info
->tsec
->output_offset
);
3227 /* Look for a GPDISP reloc. */
3228 gpdisp
= (elf64_alpha_find_reloc_at_ofs
3229 (tsec_relocs
, tsec_relend
, ofs
, R_ALPHA_GPDISP
));
3231 if (!gpdisp
|| gpdisp
->r_addend
!= 4)
3241 /* We've now determined that we can skip an initial gp load. Verify
3242 that the call and the target use the same gp. */
3243 if (info
->link_info
->output_bfd
->xvec
!= info
->tsec
->owner
->xvec
3244 || info
->gotobj
!= alpha_elf_tdata (info
->tsec
->owner
)->gotobj
)
3251 elf64_alpha_relax_with_lituse (struct alpha_relax_info
*info
,
3252 bfd_vma symval
, Elf_Internal_Rela
*irel
)
3254 Elf_Internal_Rela
*urel
, *erel
, *irelend
= info
->relend
;
3256 bfd_signed_vma disp
;
3259 bfd_boolean lit_reused
= FALSE
;
3260 bfd_boolean all_optimized
= TRUE
;
3261 bfd_boolean changed_contents
;
3262 bfd_boolean changed_relocs
;
3263 bfd_byte
*contents
= info
->contents
;
3264 bfd
*abfd
= info
->abfd
;
3265 bfd_vma sec_output_vma
;
3266 unsigned int lit_insn
;
3269 lit_insn
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
3270 if (lit_insn
>> 26 != OP_LDQ
)
3273 /* xgettext:c-format */
3274 (_("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn"),
3276 (unsigned long) irel
->r_offset
);
3280 /* Can't relax dynamic symbols. */
3281 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3284 changed_contents
= info
->changed_contents
;
3285 changed_relocs
= info
->changed_relocs
;
3286 sec_output_vma
= info
->sec
->output_section
->vma
+ info
->sec
->output_offset
;
3287 relax_pass
= info
->link_info
->relax_pass
;
3289 /* Summarize how this particular LITERAL is used. */
3290 for (erel
= irel
+1, flags
= 0; erel
< irelend
; ++erel
)
3292 if (ELF64_R_TYPE (erel
->r_info
) != R_ALPHA_LITUSE
)
3294 if (erel
->r_addend
<= 6)
3295 flags
|= 1 << erel
->r_addend
;
3298 /* A little preparation for the loop... */
3299 disp
= symval
- info
->gp
;
3301 for (urel
= irel
+1; urel
< erel
; ++urel
)
3303 bfd_vma urel_r_offset
= urel
->r_offset
;
3306 bfd_signed_vma xdisp
;
3307 Elf_Internal_Rela nrel
;
3309 insn
= bfd_get_32 (abfd
, contents
+ urel_r_offset
);
3311 switch (urel
->r_addend
)
3313 case LITUSE_ALPHA_ADDR
:
3315 /* This type is really just a placeholder to note that all
3316 uses cannot be optimized, but to still allow some. */
3317 all_optimized
= FALSE
;
3320 case LITUSE_ALPHA_BASE
:
3321 /* We may only create GPREL relocs during the second pass. */
3322 if (relax_pass
== 0)
3324 all_optimized
= FALSE
;
3328 /* We can always optimize 16-bit displacements. */
3330 /* Extract the displacement from the instruction, sign-extending
3331 it if necessary, then test whether it is within 16 or 32 bits
3332 displacement from GP. */
3333 insn_disp
= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
3335 xdisp
= disp
+ insn_disp
;
3336 fits16
= (xdisp
>= - (bfd_signed_vma
) 0x8000 && xdisp
< 0x8000);
3337 fits32
= (xdisp
>= - (bfd_signed_vma
) 0x80000000
3338 && xdisp
< 0x7fff8000);
3342 /* Take the op code and dest from this insn, take the base
3343 register from the literal insn. Leave the offset alone. */
3344 insn
= (insn
& 0xffe0ffff) | (lit_insn
& 0x001f0000);
3345 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3346 changed_contents
= TRUE
;
3349 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3351 nrel
.r_addend
= irel
->r_addend
;
3353 /* As we adjust, move the reloc to the end so that we don't
3354 break the LITERAL+LITUSE chain. */
3358 changed_relocs
= TRUE
;
3361 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3362 else if (fits32
&& !(flags
& ~6))
3364 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3366 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3368 lit_insn
= (OP_LDAH
<< 26) | (lit_insn
& 0x03ff0000);
3369 bfd_put_32 (abfd
, (bfd_vma
) lit_insn
, contents
+ irel
->r_offset
);
3371 changed_contents
= TRUE
;
3373 /* Since all relocs must be optimized, don't bother swapping
3374 this relocation to the end. */
3375 urel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3377 urel
->r_addend
= irel
->r_addend
;
3378 changed_relocs
= TRUE
;
3381 all_optimized
= FALSE
;
3384 case LITUSE_ALPHA_BYTOFF
:
3385 /* We can always optimize byte instructions. */
3387 /* FIXME: sanity check the insn for byte op. Check that the
3388 literal dest reg is indeed Rb in the byte insn. */
3390 insn
&= ~ (unsigned) 0x001ff000;
3391 insn
|= ((symval
& 7) << 13) | 0x1000;
3392 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3393 changed_contents
= TRUE
;
3396 nrel
.r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3399 /* As we adjust, move the reloc to the end so that we don't
3400 break the LITERAL+LITUSE chain. */
3404 changed_relocs
= TRUE
;
3407 case LITUSE_ALPHA_JSR
:
3408 case LITUSE_ALPHA_TLSGD
:
3409 case LITUSE_ALPHA_TLSLDM
:
3410 case LITUSE_ALPHA_JSRDIRECT
:
3412 bfd_vma optdest
, org
;
3413 bfd_signed_vma odisp
;
3415 /* For undefined weak symbols, we're mostly interested in getting
3416 rid of the got entry whenever possible, so optimize this to a
3417 use of the zero register. */
3418 if (info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3421 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3423 changed_contents
= TRUE
;
3427 /* If not zero, place to jump without needing pv. */
3428 optdest
= elf64_alpha_relax_opt_call (info
, symval
);
3429 org
= sec_output_vma
+ urel_r_offset
+ 4;
3430 odisp
= (optdest
? optdest
: symval
) - org
;
3432 if (odisp
>= -0x400000 && odisp
< 0x400000)
3434 Elf_Internal_Rela
*xrel
;
3436 /* Preserve branch prediction call stack when possible. */
3437 if ((insn
& INSN_JSR_MASK
) == INSN_JSR
)
3438 insn
= (OP_BSR
<< 26) | (insn
& 0x03e00000);
3440 insn
= (OP_BR
<< 26) | (insn
& 0x03e00000);
3441 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3442 changed_contents
= TRUE
;
3445 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3447 nrel
.r_addend
= irel
->r_addend
;
3450 nrel
.r_addend
+= optdest
- symval
;
3452 all_optimized
= FALSE
;
3454 /* Kill any HINT reloc that might exist for this insn. */
3455 xrel
= (elf64_alpha_find_reloc_at_ofs
3456 (info
->relocs
, info
->relend
, urel_r_offset
,
3459 xrel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3461 /* As we adjust, move the reloc to the end so that we don't
3462 break the LITERAL+LITUSE chain. */
3467 info
->changed_relocs
= TRUE
;
3470 all_optimized
= FALSE
;
3472 /* Even if the target is not in range for a direct branch,
3473 if we share a GP, we can eliminate the gp reload. */
3476 Elf_Internal_Rela
*gpdisp
3477 = (elf64_alpha_find_reloc_at_ofs
3478 (info
->relocs
, irelend
, urel_r_offset
+ 4,
3482 bfd_byte
*p_ldah
= contents
+ gpdisp
->r_offset
;
3483 bfd_byte
*p_lda
= p_ldah
+ gpdisp
->r_addend
;
3484 unsigned int ldah
= bfd_get_32 (abfd
, p_ldah
);
3485 unsigned int lda
= bfd_get_32 (abfd
, p_lda
);
3487 /* Verify that the instruction is "ldah $29,0($26)".
3488 Consider a function that ends in a noreturn call,
3489 and that the next function begins with an ldgp,
3490 and that by accident there is no padding between.
3491 In that case the insn would use $27 as the base. */
3492 if (ldah
== 0x27ba0000 && lda
== 0x23bd0000)
3494 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_ldah
);
3495 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_lda
);
3497 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3498 changed_contents
= TRUE
;
3499 changed_relocs
= TRUE
;
3508 /* If we reused the literal instruction, we must have optimized all. */
3509 BFD_ASSERT(!lit_reused
|| all_optimized
);
3511 /* If all cases were optimized, we can reduce the use count on this
3512 got entry by one, possibly eliminating it. */
3515 if (--info
->gotent
->use_count
== 0)
3517 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3518 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3520 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3523 /* If the literal instruction is no longer needed (it may have been
3524 reused. We can eliminate it. */
3525 /* ??? For now, I don't want to deal with compacting the section,
3526 so just nop it out. */
3529 irel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3530 changed_relocs
= TRUE
;
3532 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, contents
+ irel
->r_offset
);
3533 changed_contents
= TRUE
;
3537 info
->changed_contents
= changed_contents
;
3538 info
->changed_relocs
= changed_relocs
;
3540 if (all_optimized
|| relax_pass
== 0)
3542 return elf64_alpha_relax_got_load (info
, symval
, irel
, R_ALPHA_LITERAL
);
3546 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info
*info
, bfd_vma symval
,
3547 Elf_Internal_Rela
*irel
, bfd_boolean is_gd
)
3550 unsigned int insn
, tlsgd_reg
;
3551 Elf_Internal_Rela
*gpdisp
, *hint
;
3552 bfd_boolean dynamic
, use_gottprel
;
3553 unsigned long new_symndx
;
3555 dynamic
= alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
);
3557 /* If a TLS symbol is accessed using IE at least once, there is no point
3558 to use dynamic model for it. */
3559 if (is_gd
&& info
->h
&& (info
->h
->flags
& ALPHA_ELF_LINK_HASH_TLS_IE
))
3562 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3563 then we might as well relax to IE. */
3564 else if (bfd_link_pic (info
->link_info
) && !dynamic
3565 && (info
->link_info
->flags
& DF_STATIC_TLS
))
3568 /* Otherwise we must be building an executable to do anything. */
3569 else if (bfd_link_pic (info
->link_info
))
3572 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3573 the matching LITUSE_TLS relocations. */
3574 if (irel
+ 2 >= info
->relend
)
3576 if (ELF64_R_TYPE (irel
[1].r_info
) != R_ALPHA_LITERAL
3577 || ELF64_R_TYPE (irel
[2].r_info
) != R_ALPHA_LITUSE
3578 || irel
[2].r_addend
!= (is_gd
? LITUSE_ALPHA_TLSGD
: LITUSE_ALPHA_TLSLDM
))
3581 /* There must be a GPDISP relocation positioned immediately after the
3582 LITUSE relocation. */
3583 gpdisp
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3584 irel
[2].r_offset
+ 4, R_ALPHA_GPDISP
);
3588 pos
[0] = info
->contents
+ irel
[0].r_offset
;
3589 pos
[1] = info
->contents
+ irel
[1].r_offset
;
3590 pos
[2] = info
->contents
+ irel
[2].r_offset
;
3591 pos
[3] = info
->contents
+ gpdisp
->r_offset
;
3592 pos
[4] = pos
[3] + gpdisp
->r_addend
;
3594 /* Beware of the compiler hoisting part of the sequence out a loop
3595 and adjusting the destination register for the TLSGD insn. If this
3596 happens, there will be a move into $16 before the JSR insn, so only
3597 transformations of the first insn pair should use this register. */
3598 tlsgd_reg
= bfd_get_32 (info
->abfd
, pos
[0]);
3599 tlsgd_reg
= (tlsgd_reg
>> 21) & 31;
3601 /* Generally, the positions are not allowed to be out of order, lest the
3602 modified insn sequence have different register lifetimes. We can make
3603 an exception when pos 1 is adjacent to pos 0. */
3604 if (pos
[1] + 4 == pos
[0])
3606 bfd_byte
*tmp
= pos
[0];
3610 if (pos
[1] >= pos
[2] || pos
[2] >= pos
[3])
3613 /* Reduce the use count on the LITERAL relocation. Do this before we
3614 smash the symndx when we adjust the relocations below. */
3616 struct alpha_elf_got_entry
*lit_gotent
;
3617 struct alpha_elf_link_hash_entry
*lit_h
;
3620 BFD_ASSERT (ELF64_R_SYM (irel
[1].r_info
) >= info
->symtab_hdr
->sh_info
);
3621 indx
= ELF64_R_SYM (irel
[1].r_info
) - info
->symtab_hdr
->sh_info
;
3622 lit_h
= alpha_elf_sym_hashes (info
->abfd
)[indx
];
3624 while (lit_h
->root
.root
.type
== bfd_link_hash_indirect
3625 || lit_h
->root
.root
.type
== bfd_link_hash_warning
)
3626 lit_h
= (struct alpha_elf_link_hash_entry
*) lit_h
->root
.root
.u
.i
.link
;
3628 for (lit_gotent
= lit_h
->got_entries
; lit_gotent
;
3629 lit_gotent
= lit_gotent
->next
)
3630 if (lit_gotent
->gotobj
== info
->gotobj
3631 && lit_gotent
->reloc_type
== R_ALPHA_LITERAL
3632 && lit_gotent
->addend
== irel
[1].r_addend
)
3634 BFD_ASSERT (lit_gotent
);
3636 if (--lit_gotent
->use_count
== 0)
3638 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3639 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3645 lda $16,x($gp) !tlsgd!1
3646 ldq $27,__tls_get_addr($gp) !literal!1
3647 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3648 ldah $29,0($26) !gpdisp!2
3649 lda $29,0($29) !gpdisp!2
3651 ldq $16,x($gp) !gottprel
3656 or the first pair to
3657 lda $16,x($gp) !tprel
3660 ldah $16,x($gp) !tprelhi
3661 lda $16,x($16) !tprello
3665 use_gottprel
= FALSE
;
3666 new_symndx
= is_gd
? ELF64_R_SYM (irel
->r_info
) : STN_UNDEF
;
3668 /* Some compilers warn about a Boolean-looking expression being
3669 used in a switch. The explicit cast silences them. */
3670 switch ((int) (!dynamic
&& !bfd_link_pic (info
->link_info
)))
3675 bfd_signed_vma disp
;
3677 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3678 tp_base
= alpha_get_tprel_base (info
->link_info
);
3679 disp
= symval
- tp_base
;
3681 if (disp
>= -0x8000 && disp
< 0x8000)
3683 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3684 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3685 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3687 irel
[0].r_offset
= pos
[0] - info
->contents
;
3688 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPREL16
);
3689 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3692 else if (disp
>= -(bfd_signed_vma
) 0x80000000
3693 && disp
< (bfd_signed_vma
) 0x7fff8000
3694 && pos
[0] + 4 == pos
[1])
3696 insn
= (OP_LDAH
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3697 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3698 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (tlsgd_reg
<< 16);
3699 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[1]);
3701 irel
[0].r_offset
= pos
[0] - info
->contents
;
3702 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELHI
);
3703 irel
[1].r_offset
= pos
[1] - info
->contents
;
3704 irel
[1].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELLO
);
3711 use_gottprel
= TRUE
;
3713 insn
= (OP_LDQ
<< 26) | (tlsgd_reg
<< 21) | (29 << 16);
3714 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3715 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3717 irel
[0].r_offset
= pos
[0] - info
->contents
;
3718 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_GOTTPREL
);
3719 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3723 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_RDUNIQ
, pos
[2]);
3725 insn
= INSN_ADDQ
| (16 << 21) | (0 << 16) | (0 << 0);
3726 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[3]);
3728 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[4]);
3730 irel
[2].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3731 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3733 hint
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3734 irel
[2].r_offset
, R_ALPHA_HINT
);
3736 hint
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3738 info
->changed_contents
= TRUE
;
3739 info
->changed_relocs
= TRUE
;
3741 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3742 if (--info
->gotent
->use_count
== 0)
3744 int sz
= alpha_got_entry_size (info
->gotent
->reloc_type
);
3745 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3747 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3750 /* If we've switched to a GOTTPREL relocation, increment the reference
3751 count on that got entry. */
3754 struct alpha_elf_got_entry
*tprel_gotent
;
3756 for (tprel_gotent
= *info
->first_gotent
; tprel_gotent
;
3757 tprel_gotent
= tprel_gotent
->next
)
3758 if (tprel_gotent
->gotobj
== info
->gotobj
3759 && tprel_gotent
->reloc_type
== R_ALPHA_GOTTPREL
3760 && tprel_gotent
->addend
== irel
->r_addend
)
3763 tprel_gotent
->use_count
++;
3766 if (info
->gotent
->use_count
== 0)
3767 tprel_gotent
= info
->gotent
;
3770 tprel_gotent
= (struct alpha_elf_got_entry
*)
3771 bfd_alloc (info
->abfd
, sizeof (struct alpha_elf_got_entry
));
3775 tprel_gotent
->next
= *info
->first_gotent
;
3776 *info
->first_gotent
= tprel_gotent
;
3778 tprel_gotent
->gotobj
= info
->gotobj
;
3779 tprel_gotent
->addend
= irel
->r_addend
;
3780 tprel_gotent
->got_offset
= -1;
3781 tprel_gotent
->reloc_done
= 0;
3782 tprel_gotent
->reloc_xlated
= 0;
3785 tprel_gotent
->use_count
= 1;
3786 tprel_gotent
->reloc_type
= R_ALPHA_GOTTPREL
;
3794 elf64_alpha_relax_section (bfd
*abfd
, asection
*sec
,
3795 struct bfd_link_info
*link_info
, bfd_boolean
*again
)
3797 Elf_Internal_Shdr
*symtab_hdr
;
3798 Elf_Internal_Rela
*internal_relocs
;
3799 Elf_Internal_Rela
*irel
, *irelend
;
3800 Elf_Internal_Sym
*isymbuf
= NULL
;
3801 struct alpha_elf_got_entry
**local_got_entries
;
3802 struct alpha_relax_info info
;
3803 struct alpha_elf_link_hash_table
* htab
;
3806 htab
= alpha_elf_hash_table (link_info
);
3810 /* There's nothing to change, yet. */
3813 if (bfd_link_relocatable (link_info
)
3814 || ((sec
->flags
& (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3815 != (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3816 || sec
->reloc_count
== 0)
3819 BFD_ASSERT (is_alpha_elf (abfd
));
3820 relax_pass
= link_info
->relax_pass
;
3822 /* Make sure our GOT and PLT tables are up-to-date. */
3823 if (htab
->relax_trip
!= link_info
->relax_trip
)
3825 htab
->relax_trip
= link_info
->relax_trip
;
3827 /* This should never fail after the initial round, since the only error
3828 is GOT overflow, and relaxation only shrinks the table. However, we
3829 may only merge got sections during the first pass. If we merge
3830 sections after we've created GPREL relocs, the GP for the merged
3831 section backs up which may put the relocs out of range. */
3832 if (!elf64_alpha_size_got_sections (link_info
, relax_pass
== 0))
3834 if (elf_hash_table (link_info
)->dynamic_sections_created
)
3836 elf64_alpha_size_plt_section (link_info
);
3837 elf64_alpha_size_rela_got_section (link_info
);
3841 symtab_hdr
= &elf_symtab_hdr (abfd
);
3842 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
3844 /* Load the relocations for this section. */
3845 internal_relocs
= (_bfd_elf_link_read_relocs
3846 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3847 link_info
->keep_memory
));
3848 if (internal_relocs
== NULL
)
3851 memset(&info
, 0, sizeof (info
));
3854 info
.link_info
= link_info
;
3855 info
.symtab_hdr
= symtab_hdr
;
3856 info
.relocs
= internal_relocs
;
3857 info
.relend
= irelend
= internal_relocs
+ sec
->reloc_count
;
3859 /* Find the GP for this object. Do not store the result back via
3860 _bfd_set_gp_value, since this could change again before final. */
3861 info
.gotobj
= alpha_elf_tdata (abfd
)->gotobj
;
3864 asection
*sgot
= alpha_elf_tdata (info
.gotobj
)->got
;
3865 info
.gp
= (sgot
->output_section
->vma
3866 + sgot
->output_offset
3870 /* Get the section contents. */
3871 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3872 info
.contents
= elf_section_data (sec
)->this_hdr
.contents
;
3875 if (!bfd_malloc_and_get_section (abfd
, sec
, &info
.contents
))
3879 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3882 struct alpha_elf_got_entry
*gotent
;
3883 unsigned long r_type
= ELF64_R_TYPE (irel
->r_info
);
3884 unsigned long r_symndx
= ELF64_R_SYM (irel
->r_info
);
3886 /* Early exit for unhandled or unrelaxable relocations. */
3887 if (r_type
!= R_ALPHA_LITERAL
)
3889 /* We complete everything except LITERAL in the first pass. */
3890 if (relax_pass
!= 0)
3892 if (r_type
== R_ALPHA_TLSLDM
)
3894 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3895 reloc to the STN_UNDEF (0) symbol so that they all match. */
3896 r_symndx
= STN_UNDEF
;
3898 else if (r_type
!= R_ALPHA_GOTDTPREL
3899 && r_type
!= R_ALPHA_GOTTPREL
3900 && r_type
!= R_ALPHA_TLSGD
)
3904 /* Get the value of the symbol referred to by the reloc. */
3905 if (r_symndx
< symtab_hdr
->sh_info
)
3907 /* A local symbol. */
3908 Elf_Internal_Sym
*isym
;
3910 /* Read this BFD's local symbols. */
3911 if (isymbuf
== NULL
)
3913 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3914 if (isymbuf
== NULL
)
3915 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
3916 symtab_hdr
->sh_info
, 0,
3918 if (isymbuf
== NULL
)
3922 isym
= isymbuf
+ r_symndx
;
3924 /* Given the symbol for a TLSLDM reloc is ignored, this also
3925 means forcing the symbol value to the tp base. */
3926 if (r_type
== R_ALPHA_TLSLDM
)
3928 info
.tsec
= bfd_abs_section_ptr
;
3929 symval
= alpha_get_tprel_base (info
.link_info
);
3933 symval
= isym
->st_value
;
3934 if (isym
->st_shndx
== SHN_UNDEF
)
3936 else if (isym
->st_shndx
== SHN_ABS
)
3937 info
.tsec
= bfd_abs_section_ptr
;
3938 else if (isym
->st_shndx
== SHN_COMMON
)
3939 info
.tsec
= bfd_com_section_ptr
;
3941 info
.tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3945 info
.other
= isym
->st_other
;
3946 if (local_got_entries
)
3947 info
.first_gotent
= &local_got_entries
[r_symndx
];
3950 info
.first_gotent
= &info
.gotent
;
3957 struct alpha_elf_link_hash_entry
*h
;
3959 indx
= r_symndx
- symtab_hdr
->sh_info
;
3960 h
= alpha_elf_sym_hashes (abfd
)[indx
];
3961 BFD_ASSERT (h
!= NULL
);
3963 while (h
->root
.root
.type
== bfd_link_hash_indirect
3964 || h
->root
.root
.type
== bfd_link_hash_warning
)
3965 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
3967 /* If the symbol is undefined, we can't do anything with it. */
3968 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
3971 /* If the symbol isn't defined in the current module,
3972 again we can't do anything. */
3973 if (h
->root
.root
.type
== bfd_link_hash_undefweak
)
3975 info
.tsec
= bfd_abs_section_ptr
;
3978 else if (!h
->root
.def_regular
)
3980 /* Except for TLSGD relocs, which can sometimes be
3981 relaxed to GOTTPREL relocs. */
3982 if (r_type
!= R_ALPHA_TLSGD
)
3984 info
.tsec
= bfd_abs_section_ptr
;
3989 info
.tsec
= h
->root
.root
.u
.def
.section
;
3990 symval
= h
->root
.root
.u
.def
.value
;
3994 info
.other
= h
->root
.other
;
3995 info
.first_gotent
= &h
->got_entries
;
3998 /* Search for the got entry to be used by this relocation. */
3999 for (gotent
= *info
.first_gotent
; gotent
; gotent
= gotent
->next
)
4000 if (gotent
->gotobj
== info
.gotobj
4001 && gotent
->reloc_type
== r_type
4002 && gotent
->addend
== irel
->r_addend
)
4004 info
.gotent
= gotent
;
4006 symval
+= info
.tsec
->output_section
->vma
+ info
.tsec
->output_offset
;
4007 symval
+= irel
->r_addend
;
4011 case R_ALPHA_LITERAL
:
4012 BFD_ASSERT(info
.gotent
!= NULL
);
4014 /* If there exist LITUSE relocations immediately following, this
4015 opens up all sorts of interesting optimizations, because we
4016 now know every location that this address load is used. */
4017 if (irel
+1 < irelend
4018 && ELF64_R_TYPE (irel
[1].r_info
) == R_ALPHA_LITUSE
)
4020 if (!elf64_alpha_relax_with_lituse (&info
, symval
, irel
))
4025 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
4030 case R_ALPHA_GOTDTPREL
:
4031 case R_ALPHA_GOTTPREL
:
4032 BFD_ASSERT(info
.gotent
!= NULL
);
4033 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
4038 case R_ALPHA_TLSLDM
:
4039 BFD_ASSERT(info
.gotent
!= NULL
);
4040 if (!elf64_alpha_relax_tls_get_addr (&info
, symval
, irel
,
4041 r_type
== R_ALPHA_TLSGD
))
4048 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4050 if (!link_info
->keep_memory
)
4054 /* Cache the symbols for elf_link_input_bfd. */
4055 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
4059 if (info
.contents
!= NULL
4060 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4062 if (!info
.changed_contents
&& !link_info
->keep_memory
)
4063 free (info
.contents
);
4066 /* Cache the section contents for elf_link_input_bfd. */
4067 elf_section_data (sec
)->this_hdr
.contents
= info
.contents
;
4071 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
4073 if (!info
.changed_relocs
)
4074 free (internal_relocs
);
4076 elf_section_data (sec
)->relocs
= internal_relocs
;
4079 *again
= info
.changed_contents
|| info
.changed_relocs
;
4085 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4087 if (info
.contents
!= NULL
4088 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4089 free (info
.contents
);
4090 if (internal_relocs
!= NULL
4091 && elf_section_data (sec
)->relocs
!= internal_relocs
)
4092 free (internal_relocs
);
4096 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4097 into the next available slot in SREL. */
4100 elf64_alpha_emit_dynrel (bfd
*abfd
, struct bfd_link_info
*info
,
4101 asection
*sec
, asection
*srel
, bfd_vma offset
,
4102 long dynindx
, long rtype
, bfd_vma addend
)
4104 Elf_Internal_Rela outrel
;
4107 BFD_ASSERT (srel
!= NULL
);
4109 outrel
.r_info
= ELF64_R_INFO (dynindx
, rtype
);
4110 outrel
.r_addend
= addend
;
4112 offset
= _bfd_elf_section_offset (abfd
, info
, sec
, offset
);
4113 if ((offset
| 1) != (bfd_vma
) -1)
4114 outrel
.r_offset
= sec
->output_section
->vma
+ sec
->output_offset
+ offset
;
4116 memset (&outrel
, 0, sizeof (outrel
));
4118 loc
= srel
->contents
;
4119 loc
+= srel
->reloc_count
++ * sizeof (Elf64_External_Rela
);
4120 bfd_elf64_swap_reloca_out (abfd
, &outrel
, loc
);
4121 BFD_ASSERT (sizeof (Elf64_External_Rela
) * srel
->reloc_count
<= srel
->size
);
4124 /* Relocate an Alpha ELF section for a relocatable link.
4126 We don't have to change anything unless the reloc is against a section
4127 symbol, in which case we have to adjust according to where the section
4128 symbol winds up in the output section. */
4131 elf64_alpha_relocate_section_r (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4132 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4133 bfd
*input_bfd
, asection
*input_section
,
4134 bfd_byte
*contents ATTRIBUTE_UNUSED
,
4135 Elf_Internal_Rela
*relocs
,
4136 Elf_Internal_Sym
*local_syms
,
4137 asection
**local_sections
)
4139 unsigned long symtab_hdr_sh_info
;
4140 Elf_Internal_Rela
*rel
;
4141 Elf_Internal_Rela
*relend
;
4142 struct elf_link_hash_entry
**sym_hashes
;
4143 bfd_boolean ret_val
= TRUE
;
4145 symtab_hdr_sh_info
= elf_symtab_hdr (input_bfd
).sh_info
;
4146 sym_hashes
= elf_sym_hashes (input_bfd
);
4148 relend
= relocs
+ input_section
->reloc_count
;
4149 for (rel
= relocs
; rel
< relend
; rel
++)
4151 unsigned long r_symndx
;
4152 Elf_Internal_Sym
*sym
;
4154 unsigned long r_type
;
4156 r_type
= ELF64_R_TYPE (rel
->r_info
);
4157 if (r_type
>= R_ALPHA_max
)
4160 /* xgettext:c-format */
4161 (_("%B: unknown relocation type %d"),
4162 input_bfd
, (int) r_type
);
4163 bfd_set_error (bfd_error_bad_value
);
4168 /* The symbol associated with GPDISP and LITUSE is
4169 immaterial. Only the addend is significant. */
4170 if (r_type
== R_ALPHA_GPDISP
|| r_type
== R_ALPHA_LITUSE
)
4173 r_symndx
= ELF64_R_SYM (rel
->r_info
);
4174 if (r_symndx
< symtab_hdr_sh_info
)
4176 sym
= local_syms
+ r_symndx
;
4177 sec
= local_sections
[r_symndx
];
4181 struct elf_link_hash_entry
*h
;
4183 h
= sym_hashes
[r_symndx
- symtab_hdr_sh_info
];
4185 while (h
->root
.type
== bfd_link_hash_indirect
4186 || h
->root
.type
== bfd_link_hash_warning
)
4187 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4189 if (h
->root
.type
!= bfd_link_hash_defined
4190 && h
->root
.type
!= bfd_link_hash_defweak
)
4194 sec
= h
->root
.u
.def
.section
;
4197 if (sec
!= NULL
&& discarded_section (sec
))
4198 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4200 elf64_alpha_howto_table
+ r_type
, 0,
4203 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
4204 rel
->r_addend
+= sec
->output_offset
;
4210 /* Relocate an Alpha ELF section. */
4213 elf64_alpha_relocate_section (bfd
*output_bfd
, struct bfd_link_info
*info
,
4214 bfd
*input_bfd
, asection
*input_section
,
4215 bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
4216 Elf_Internal_Sym
*local_syms
,
4217 asection
**local_sections
)
4219 Elf_Internal_Shdr
*symtab_hdr
;
4220 Elf_Internal_Rela
*rel
;
4221 Elf_Internal_Rela
*relend
;
4222 asection
*sgot
, *srel
, *srelgot
;
4223 bfd
*dynobj
, *gotobj
;
4224 bfd_vma gp
, tp_base
, dtp_base
;
4225 struct alpha_elf_got_entry
**local_got_entries
;
4226 bfd_boolean ret_val
;
4228 BFD_ASSERT (is_alpha_elf (input_bfd
));
4230 /* Handle relocatable links with a smaller loop. */
4231 if (bfd_link_relocatable (info
))
4232 return elf64_alpha_relocate_section_r (output_bfd
, info
, input_bfd
,
4233 input_section
, contents
, relocs
,
4234 local_syms
, local_sections
);
4236 /* This is a final link. */
4240 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4242 dynobj
= elf_hash_table (info
)->dynobj
;
4243 srelgot
= elf_hash_table (info
)->srelgot
;
4245 if (input_section
->flags
& SEC_ALLOC
)
4247 const char *section_name
;
4248 section_name
= (bfd_elf_string_from_elf_section
4249 (input_bfd
, elf_elfheader(input_bfd
)->e_shstrndx
,
4250 _bfd_elf_single_rel_hdr (input_section
)->sh_name
));
4251 BFD_ASSERT(section_name
!= NULL
);
4252 srel
= bfd_get_linker_section (dynobj
, section_name
);
4257 /* Find the gp value for this input bfd. */
4258 gotobj
= alpha_elf_tdata (input_bfd
)->gotobj
;
4261 sgot
= alpha_elf_tdata (gotobj
)->got
;
4262 gp
= _bfd_get_gp_value (gotobj
);
4265 gp
= (sgot
->output_section
->vma
4266 + sgot
->output_offset
4268 _bfd_set_gp_value (gotobj
, gp
);
4277 local_got_entries
= alpha_elf_tdata(input_bfd
)->local_got_entries
;
4279 if (elf_hash_table (info
)->tls_sec
!= NULL
)
4281 dtp_base
= alpha_get_dtprel_base (info
);
4282 tp_base
= alpha_get_tprel_base (info
);
4285 dtp_base
= tp_base
= 0;
4287 relend
= relocs
+ input_section
->reloc_count
;
4288 for (rel
= relocs
; rel
< relend
; rel
++)
4290 struct alpha_elf_link_hash_entry
*h
= NULL
;
4291 struct alpha_elf_got_entry
*gotent
;
4292 bfd_reloc_status_type r
;
4293 reloc_howto_type
*howto
;
4294 unsigned long r_symndx
;
4295 Elf_Internal_Sym
*sym
= NULL
;
4296 asection
*sec
= NULL
;
4299 bfd_boolean dynamic_symbol_p
;
4300 bfd_boolean unresolved_reloc
= FALSE
;
4301 bfd_boolean undef_weak_ref
= FALSE
;
4302 unsigned long r_type
;
4304 r_type
= ELF64_R_TYPE(rel
->r_info
);
4305 if (r_type
>= R_ALPHA_max
)
4308 /* xgettext:c-format */
4309 (_("%B: unknown relocation type %d"),
4310 input_bfd
, (int) r_type
);
4311 bfd_set_error (bfd_error_bad_value
);
4316 howto
= elf64_alpha_howto_table
+ r_type
;
4317 r_symndx
= ELF64_R_SYM(rel
->r_info
);
4319 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4320 reloc to the STN_UNDEF (0) symbol so that they all match. */
4321 if (r_type
== R_ALPHA_TLSLDM
)
4322 r_symndx
= STN_UNDEF
;
4324 if (r_symndx
< symtab_hdr
->sh_info
)
4327 sym
= local_syms
+ r_symndx
;
4328 sec
= local_sections
[r_symndx
];
4330 value
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &msec
, rel
);
4332 /* If this is a tp-relative relocation against sym STN_UNDEF (0),
4333 this is hackery from relax_section. Force the value to
4334 be the tls module base. */
4335 if (r_symndx
== STN_UNDEF
4336 && (r_type
== R_ALPHA_TLSLDM
4337 || r_type
== R_ALPHA_GOTTPREL
4338 || r_type
== R_ALPHA_TPREL64
4339 || r_type
== R_ALPHA_TPRELHI
4340 || r_type
== R_ALPHA_TPRELLO
4341 || r_type
== R_ALPHA_TPREL16
))
4344 if (local_got_entries
)
4345 gotent
= local_got_entries
[r_symndx
];
4349 /* Need to adjust local GOT entries' addends for SEC_MERGE
4350 unless it has been done already. */
4351 if ((sec
->flags
& SEC_MERGE
)
4352 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
4353 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
4355 && !gotent
->reloc_xlated
)
4357 struct alpha_elf_got_entry
*ent
;
4359 for (ent
= gotent
; ent
; ent
= ent
->next
)
4361 ent
->reloc_xlated
= 1;
4362 if (ent
->use_count
== 0)
4366 _bfd_merged_section_offset (output_bfd
, &msec
,
4367 elf_section_data (sec
)->
4369 sym
->st_value
+ ent
->addend
);
4370 ent
->addend
-= sym
->st_value
;
4371 ent
->addend
+= msec
->output_section
->vma
4372 + msec
->output_offset
4373 - sec
->output_section
->vma
4374 - sec
->output_offset
;
4378 dynamic_symbol_p
= FALSE
;
4382 bfd_boolean warned
, ignored
;
4383 struct elf_link_hash_entry
*hh
;
4384 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
4386 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4387 r_symndx
, symtab_hdr
, sym_hashes
,
4389 unresolved_reloc
, warned
, ignored
);
4395 && ! unresolved_reloc
4396 && hh
->root
.type
== bfd_link_hash_undefweak
)
4397 undef_weak_ref
= TRUE
;
4399 h
= (struct alpha_elf_link_hash_entry
*) hh
;
4400 dynamic_symbol_p
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
4401 gotent
= h
->got_entries
;
4404 if (sec
!= NULL
&& discarded_section (sec
))
4405 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4406 rel
, 1, relend
, howto
, 0, contents
);
4408 addend
= rel
->r_addend
;
4411 /* Search for the proper got entry. */
4412 for (; gotent
; gotent
= gotent
->next
)
4413 if (gotent
->gotobj
== gotobj
4414 && gotent
->reloc_type
== r_type
4415 && gotent
->addend
== addend
)
4420 case R_ALPHA_GPDISP
:
4422 bfd_byte
*p_ldah
, *p_lda
;
4424 BFD_ASSERT(gp
!= 0);
4426 value
= (input_section
->output_section
->vma
4427 + input_section
->output_offset
4430 p_ldah
= contents
+ rel
->r_offset
;
4431 p_lda
= p_ldah
+ rel
->r_addend
;
4433 r
= elf64_alpha_do_reloc_gpdisp (input_bfd
, gp
- value
,
4438 case R_ALPHA_LITERAL
:
4439 BFD_ASSERT(sgot
!= NULL
);
4440 BFD_ASSERT(gp
!= 0);
4441 BFD_ASSERT(gotent
!= NULL
);
4442 BFD_ASSERT(gotent
->use_count
>= 1);
4444 if (!gotent
->reloc_done
)
4446 gotent
->reloc_done
= 1;
4448 bfd_put_64 (output_bfd
, value
,
4449 sgot
->contents
+ gotent
->got_offset
);
4451 /* If the symbol has been forced local, output a
4452 RELATIVE reloc, otherwise it will be handled in
4453 finish_dynamic_symbol. */
4454 if (bfd_link_pic (info
)
4455 && !dynamic_symbol_p
4457 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4458 gotent
->got_offset
, 0,
4459 R_ALPHA_RELATIVE
, value
);
4462 value
= (sgot
->output_section
->vma
4463 + sgot
->output_offset
4464 + gotent
->got_offset
);
4468 case R_ALPHA_GPREL32
:
4469 case R_ALPHA_GPREL16
:
4470 case R_ALPHA_GPRELLOW
:
4471 if (dynamic_symbol_p
)
4474 /* xgettext:c-format */
4475 (_("%B: gp-relative relocation against dynamic symbol %s"),
4476 input_bfd
, h
->root
.root
.root
.string
);
4479 BFD_ASSERT(gp
!= 0);
4483 case R_ALPHA_GPRELHIGH
:
4484 if (dynamic_symbol_p
)
4487 /* xgettext:c-format */
4488 (_("%B: gp-relative relocation against dynamic symbol %s"),
4489 input_bfd
, h
->root
.root
.root
.string
);
4492 BFD_ASSERT(gp
!= 0);
4494 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4498 /* A call to a dynamic symbol is definitely out of range of
4499 the 16-bit displacement. Don't bother writing anything. */
4500 if (dynamic_symbol_p
)
4505 /* The regular PC-relative stuff measures from the start of
4506 the instruction rather than the end. */
4510 case R_ALPHA_BRADDR
:
4511 if (dynamic_symbol_p
)
4514 /* xgettext:c-format */
4515 (_("%B: pc-relative relocation against dynamic symbol %s"),
4516 input_bfd
, h
->root
.root
.root
.string
);
4519 /* The regular PC-relative stuff measures from the start of
4520 the instruction rather than the end. */
4529 /* The regular PC-relative stuff measures from the start of
4530 the instruction rather than the end. */
4533 /* The source and destination gp must be the same. Note that
4534 the source will always have an assigned gp, since we forced
4535 one in check_relocs, but that the destination may not, as
4536 it might not have had any relocations at all. Also take
4537 care not to crash if H is an undefined symbol. */
4538 if (h
!= NULL
&& sec
!= NULL
4539 && alpha_elf_tdata (sec
->owner
)->gotobj
4540 && gotobj
!= alpha_elf_tdata (sec
->owner
)->gotobj
)
4543 /* xgettext:c-format */
4544 (_("%B: change in gp: BRSGP %s"),
4545 input_bfd
, h
->root
.root
.root
.string
);
4549 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4551 other
= h
->root
.other
;
4553 other
= sym
->st_other
;
4554 switch (other
& STO_ALPHA_STD_GPLOAD
)
4556 case STO_ALPHA_NOPV
:
4558 case STO_ALPHA_STD_GPLOAD
:
4563 name
= h
->root
.root
.root
.string
;
4566 name
= (bfd_elf_string_from_elf_section
4567 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4569 name
= _("<unknown>");
4570 else if (name
[0] == 0)
4571 name
= bfd_section_name (input_bfd
, sec
);
4574 /* xgettext:c-format */
4575 (_("%B: !samegp reloc against symbol without .prologue: %s"),
4584 case R_ALPHA_REFLONG
:
4585 case R_ALPHA_REFQUAD
:
4586 case R_ALPHA_DTPREL64
:
4587 case R_ALPHA_TPREL64
:
4589 long dynindx
, dyntype
= r_type
;
4592 /* Careful here to remember RELATIVE relocations for global
4593 variables for symbolic shared objects. */
4595 if (dynamic_symbol_p
)
4597 BFD_ASSERT(h
->root
.dynindx
!= -1);
4598 dynindx
= h
->root
.dynindx
;
4600 addend
= 0, value
= 0;
4602 else if (r_type
== R_ALPHA_DTPREL64
)
4604 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4608 else if (r_type
== R_ALPHA_TPREL64
)
4610 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4611 if (!bfd_link_dll (info
))
4617 dynaddend
= value
- dtp_base
;
4619 else if (bfd_link_pic (info
)
4620 && r_symndx
!= STN_UNDEF
4621 && (input_section
->flags
& SEC_ALLOC
)
4623 && !(unresolved_reloc
4624 && (_bfd_elf_section_offset (output_bfd
, info
,
4629 if (r_type
== R_ALPHA_REFLONG
)
4632 /* xgettext:c-format */
4633 (_("%B: unhandled dynamic relocation against %s"),
4635 h
->root
.root
.root
.string
);
4639 dyntype
= R_ALPHA_RELATIVE
;
4645 if (input_section
->flags
& SEC_ALLOC
)
4646 elf64_alpha_emit_dynrel (output_bfd
, info
, input_section
,
4647 srel
, rel
->r_offset
, dynindx
,
4648 dyntype
, dynaddend
);
4652 case R_ALPHA_SREL16
:
4653 case R_ALPHA_SREL32
:
4654 case R_ALPHA_SREL64
:
4655 if (dynamic_symbol_p
)
4658 /* xgettext:c-format */
4659 (_("%B: pc-relative relocation against dynamic symbol %s"),
4660 input_bfd
, h
->root
.root
.root
.string
);
4663 else if (bfd_link_pic (info
)
4667 /* xgettext:c-format */
4668 (_("%B: pc-relative relocation against undefined weak symbol %s"),
4669 input_bfd
, h
->root
.root
.root
.string
);
4674 /* ??? .eh_frame references to discarded sections will be smashed
4675 to relocations against SHN_UNDEF. The .eh_frame format allows
4676 NULL to be encoded as 0 in any format, so this works here. */
4677 if (r_symndx
== STN_UNDEF
4678 || (unresolved_reloc
4679 && _bfd_elf_section_offset (output_bfd
, info
,
4681 rel
->r_offset
) == (bfd_vma
) -1))
4682 howto
= (elf64_alpha_howto_table
4683 + (r_type
- R_ALPHA_SREL32
+ R_ALPHA_REFLONG
));
4686 case R_ALPHA_TLSLDM
:
4687 /* Ignore the symbol for the relocation. The result is always
4688 the current module. */
4689 dynamic_symbol_p
= 0;
4693 if (!gotent
->reloc_done
)
4695 gotent
->reloc_done
= 1;
4697 /* Note that the module index for the main program is 1. */
4698 bfd_put_64 (output_bfd
,
4699 !bfd_link_pic (info
) && !dynamic_symbol_p
,
4700 sgot
->contents
+ gotent
->got_offset
);
4702 /* If the symbol has been forced local, output a
4703 DTPMOD64 reloc, otherwise it will be handled in
4704 finish_dynamic_symbol. */
4705 if (bfd_link_pic (info
) && !dynamic_symbol_p
)
4706 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4707 gotent
->got_offset
, 0,
4708 R_ALPHA_DTPMOD64
, 0);
4710 if (dynamic_symbol_p
|| r_type
== R_ALPHA_TLSLDM
)
4714 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4717 bfd_put_64 (output_bfd
, value
,
4718 sgot
->contents
+ gotent
->got_offset
+ 8);
4721 value
= (sgot
->output_section
->vma
4722 + sgot
->output_offset
4723 + gotent
->got_offset
);
4727 case R_ALPHA_DTPRELHI
:
4728 case R_ALPHA_DTPRELLO
:
4729 case R_ALPHA_DTPREL16
:
4730 if (dynamic_symbol_p
)
4733 /* xgettext:c-format */
4734 (_("%B: dtp-relative relocation against dynamic symbol %s"),
4735 input_bfd
, h
->root
.root
.root
.string
);
4738 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4740 if (r_type
== R_ALPHA_DTPRELHI
)
4741 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4744 case R_ALPHA_TPRELHI
:
4745 case R_ALPHA_TPRELLO
:
4746 case R_ALPHA_TPREL16
:
4747 if (bfd_link_dll (info
))
4750 /* xgettext:c-format */
4751 (_("%B: TLS local exec code cannot be linked into shared objects"),
4755 else if (dynamic_symbol_p
)
4758 /* xgettext:c-format */
4759 (_("%B: tp-relative relocation against dynamic symbol %s"),
4760 input_bfd
, h
->root
.root
.root
.string
);
4763 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4765 if (r_type
== R_ALPHA_TPRELHI
)
4766 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4769 case R_ALPHA_GOTDTPREL
:
4770 case R_ALPHA_GOTTPREL
:
4771 BFD_ASSERT(sgot
!= NULL
);
4772 BFD_ASSERT(gp
!= 0);
4773 BFD_ASSERT(gotent
!= NULL
);
4774 BFD_ASSERT(gotent
->use_count
>= 1);
4776 if (!gotent
->reloc_done
)
4778 gotent
->reloc_done
= 1;
4780 if (dynamic_symbol_p
)
4784 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4785 if (r_type
== R_ALPHA_GOTDTPREL
)
4787 else if (!bfd_link_pic (info
))
4791 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4792 gotent
->got_offset
, 0,
4798 bfd_put_64 (output_bfd
, value
,
4799 sgot
->contents
+ gotent
->got_offset
);
4802 value
= (sgot
->output_section
->vma
4803 + sgot
->output_offset
4804 + gotent
->got_offset
);
4810 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4811 contents
, rel
->r_offset
, value
, 0);
4820 case bfd_reloc_overflow
:
4824 /* Don't warn if the overflow is due to pc relative reloc
4825 against discarded section. Section optimization code should
4828 if (r_symndx
< symtab_hdr
->sh_info
4829 && sec
!= NULL
&& howto
->pc_relative
4830 && discarded_section (sec
))
4837 name
= (bfd_elf_string_from_elf_section
4838 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4842 name
= bfd_section_name (input_bfd
, sec
);
4844 (*info
->callbacks
->reloc_overflow
)
4845 (info
, (h
? &h
->root
.root
: NULL
), name
, howto
->name
,
4846 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4851 case bfd_reloc_outofrange
:
4859 /* Finish up dynamic symbol handling. We set the contents of various
4860 dynamic sections here. */
4863 elf64_alpha_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
4864 struct elf_link_hash_entry
*h
,
4865 Elf_Internal_Sym
*sym
)
4867 struct alpha_elf_link_hash_entry
*ah
= (struct alpha_elf_link_hash_entry
*)h
;
4871 /* Fill in the .plt entry for this symbol. */
4872 asection
*splt
, *sgot
, *srel
;
4873 Elf_Internal_Rela outrel
;
4875 bfd_vma got_addr
, plt_addr
;
4877 struct alpha_elf_got_entry
*gotent
;
4879 BFD_ASSERT (h
->dynindx
!= -1);
4881 splt
= elf_hash_table (info
)->splt
;
4882 BFD_ASSERT (splt
!= NULL
);
4883 srel
= elf_hash_table (info
)->srelplt
;
4884 BFD_ASSERT (srel
!= NULL
);
4886 for (gotent
= ah
->got_entries
; gotent
; gotent
= gotent
->next
)
4887 if (gotent
->reloc_type
== R_ALPHA_LITERAL
4888 && gotent
->use_count
> 0)
4893 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4894 BFD_ASSERT (sgot
!= NULL
);
4896 BFD_ASSERT (gotent
->got_offset
!= -1);
4897 BFD_ASSERT (gotent
->plt_offset
!= -1);
4899 got_addr
= (sgot
->output_section
->vma
4900 + sgot
->output_offset
4901 + gotent
->got_offset
);
4902 plt_addr
= (splt
->output_section
->vma
4903 + splt
->output_offset
4904 + gotent
->plt_offset
);
4906 plt_index
= (gotent
->plt_offset
-PLT_HEADER_SIZE
) / PLT_ENTRY_SIZE
;
4908 /* Fill in the entry in the procedure linkage table. */
4909 if (elf64_alpha_use_secureplt
)
4911 disp
= (PLT_HEADER_SIZE
- 4) - (gotent
->plt_offset
+ 4);
4912 insn
= INSN_AD (INSN_BR
, 31, disp
);
4913 bfd_put_32 (output_bfd
, insn
,
4914 splt
->contents
+ gotent
->plt_offset
);
4916 plt_index
= ((gotent
->plt_offset
- NEW_PLT_HEADER_SIZE
)
4917 / NEW_PLT_ENTRY_SIZE
);
4921 disp
= -(gotent
->plt_offset
+ 4);
4922 insn
= INSN_AD (INSN_BR
, 28, disp
);
4923 bfd_put_32 (output_bfd
, insn
,
4924 splt
->contents
+ gotent
->plt_offset
);
4925 bfd_put_32 (output_bfd
, INSN_UNOP
,
4926 splt
->contents
+ gotent
->plt_offset
+ 4);
4927 bfd_put_32 (output_bfd
, INSN_UNOP
,
4928 splt
->contents
+ gotent
->plt_offset
+ 8);
4930 plt_index
= ((gotent
->plt_offset
- OLD_PLT_HEADER_SIZE
)
4931 / OLD_PLT_ENTRY_SIZE
);
4934 /* Fill in the entry in the .rela.plt section. */
4935 outrel
.r_offset
= got_addr
;
4936 outrel
.r_info
= ELF64_R_INFO(h
->dynindx
, R_ALPHA_JMP_SLOT
);
4937 outrel
.r_addend
= 0;
4939 loc
= srel
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
4940 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
4942 /* Fill in the entry in the .got. */
4943 bfd_put_64 (output_bfd
, plt_addr
,
4944 sgot
->contents
+ gotent
->got_offset
);
4947 else if (alpha_elf_dynamic_symbol_p (h
, info
))
4949 /* Fill in the dynamic relocations for this symbol's .got entries. */
4951 struct alpha_elf_got_entry
*gotent
;
4953 srel
= elf_hash_table (info
)->srelgot
;
4954 BFD_ASSERT (srel
!= NULL
);
4956 for (gotent
= ((struct alpha_elf_link_hash_entry
*) h
)->got_entries
;
4958 gotent
= gotent
->next
)
4963 if (gotent
->use_count
== 0)
4966 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4968 r_type
= gotent
->reloc_type
;
4971 case R_ALPHA_LITERAL
:
4972 r_type
= R_ALPHA_GLOB_DAT
;
4975 r_type
= R_ALPHA_DTPMOD64
;
4977 case R_ALPHA_GOTDTPREL
:
4978 r_type
= R_ALPHA_DTPREL64
;
4980 case R_ALPHA_GOTTPREL
:
4981 r_type
= R_ALPHA_TPREL64
;
4983 case R_ALPHA_TLSLDM
:
4988 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4989 gotent
->got_offset
, h
->dynindx
,
4990 r_type
, gotent
->addend
);
4992 if (gotent
->reloc_type
== R_ALPHA_TLSGD
)
4993 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4994 gotent
->got_offset
+ 8, h
->dynindx
,
4995 R_ALPHA_DTPREL64
, gotent
->addend
);
4999 /* Mark some specially defined symbols as absolute. */
5000 if (h
== elf_hash_table (info
)->hdynamic
5001 || h
== elf_hash_table (info
)->hgot
5002 || h
== elf_hash_table (info
)->hplt
)
5003 sym
->st_shndx
= SHN_ABS
;
5008 /* Finish up the dynamic sections. */
5011 elf64_alpha_finish_dynamic_sections (bfd
*output_bfd
,
5012 struct bfd_link_info
*info
)
5017 dynobj
= elf_hash_table (info
)->dynobj
;
5018 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5020 if (elf_hash_table (info
)->dynamic_sections_created
)
5022 asection
*splt
, *sgotplt
, *srelaplt
;
5023 Elf64_External_Dyn
*dyncon
, *dynconend
;
5024 bfd_vma plt_vma
, gotplt_vma
;
5026 splt
= elf_hash_table (info
)->splt
;
5027 srelaplt
= elf_hash_table (info
)->srelplt
;
5028 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
5030 plt_vma
= splt
->output_section
->vma
+ splt
->output_offset
;
5033 if (elf64_alpha_use_secureplt
)
5035 sgotplt
= elf_hash_table (info
)->sgotplt
;
5036 BFD_ASSERT (sgotplt
!= NULL
);
5037 if (sgotplt
->size
> 0)
5038 gotplt_vma
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
5041 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
5042 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5043 for (; dyncon
< dynconend
; dyncon
++)
5045 Elf_Internal_Dyn dyn
;
5047 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5053 = elf64_alpha_use_secureplt
? gotplt_vma
: plt_vma
;
5056 dyn
.d_un
.d_val
= srelaplt
? srelaplt
->size
: 0;
5059 dyn
.d_un
.d_ptr
= srelaplt
? (srelaplt
->output_section
->vma
5060 + srelaplt
->output_offset
) : 0;
5064 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5067 /* Initialize the plt header. */
5073 if (elf64_alpha_use_secureplt
)
5075 ofs
= gotplt_vma
- (plt_vma
+ PLT_HEADER_SIZE
);
5077 insn
= INSN_ABC (INSN_SUBQ
, 27, 28, 25);
5078 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5080 insn
= INSN_ABO (INSN_LDAH
, 28, 28, (ofs
+ 0x8000) >> 16);
5081 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5083 insn
= INSN_ABC (INSN_S4SUBQ
, 25, 25, 25);
5084 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5086 insn
= INSN_ABO (INSN_LDA
, 28, 28, ofs
);
5087 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5089 insn
= INSN_ABO (INSN_LDQ
, 27, 28, 0);
5090 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 16);
5092 insn
= INSN_ABC (INSN_ADDQ
, 25, 25, 25);
5093 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 20);
5095 insn
= INSN_ABO (INSN_LDQ
, 28, 28, 8);
5096 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 24);
5098 insn
= INSN_AB (INSN_JMP
, 31, 27);
5099 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 28);
5101 insn
= INSN_AD (INSN_BR
, 28, -PLT_HEADER_SIZE
);
5102 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 32);
5106 insn
= INSN_AD (INSN_BR
, 27, 0); /* br $27, .+4 */
5107 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5109 insn
= INSN_ABO (INSN_LDQ
, 27, 27, 12);
5110 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5113 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5115 insn
= INSN_AB (INSN_JMP
, 27, 27);
5116 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5118 /* The next two words will be filled in by ld.so. */
5119 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 16);
5120 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 24);
5123 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 0;
5130 /* We need to use a special link routine to handle the .mdebug section.
5131 We need to merge all instances of these sections together, not write
5132 them all out sequentially. */
5135 elf64_alpha_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5138 struct bfd_link_order
*p
;
5139 asection
*mdebug_sec
;
5140 struct ecoff_debug_info debug
;
5141 const struct ecoff_debug_swap
*swap
5142 = get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
5143 HDRR
*symhdr
= &debug
.symbolic_header
;
5144 void * mdebug_handle
= NULL
;
5145 struct alpha_elf_link_hash_table
* htab
;
5147 htab
= alpha_elf_hash_table (info
);
5151 /* Go through the sections and collect the mdebug information. */
5153 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
5155 if (strcmp (o
->name
, ".mdebug") == 0)
5157 struct extsym_info einfo
;
5159 /* We have found the .mdebug section in the output file.
5160 Look through all the link_orders comprising it and merge
5161 the information together. */
5162 symhdr
->magic
= swap
->sym_magic
;
5163 /* FIXME: What should the version stamp be? */
5165 symhdr
->ilineMax
= 0;
5169 symhdr
->isymMax
= 0;
5170 symhdr
->ioptMax
= 0;
5171 symhdr
->iauxMax
= 0;
5173 symhdr
->issExtMax
= 0;
5176 symhdr
->iextMax
= 0;
5178 /* We accumulate the debugging information itself in the
5179 debug_info structure. */
5181 debug
.external_dnr
= NULL
;
5182 debug
.external_pdr
= NULL
;
5183 debug
.external_sym
= NULL
;
5184 debug
.external_opt
= NULL
;
5185 debug
.external_aux
= NULL
;
5187 debug
.ssext
= debug
.ssext_end
= NULL
;
5188 debug
.external_fdr
= NULL
;
5189 debug
.external_rfd
= NULL
;
5190 debug
.external_ext
= debug
.external_ext_end
= NULL
;
5192 mdebug_handle
= bfd_ecoff_debug_init (abfd
, &debug
, swap
, info
);
5193 if (mdebug_handle
== NULL
)
5202 static const char * const name
[] =
5204 ".text", ".init", ".fini", ".data",
5205 ".rodata", ".sdata", ".sbss", ".bss"
5207 static const int sc
[] = { scText
, scInit
, scFini
, scData
,
5208 scRData
, scSData
, scSBss
, scBss
};
5211 esym
.cobol_main
= 0;
5215 esym
.asym
.iss
= issNil
;
5216 esym
.asym
.st
= stLocal
;
5217 esym
.asym
.reserved
= 0;
5218 esym
.asym
.index
= indexNil
;
5219 for (i
= 0; i
< 8; i
++)
5221 esym
.asym
.sc
= sc
[i
];
5222 s
= bfd_get_section_by_name (abfd
, name
[i
]);
5225 esym
.asym
.value
= s
->vma
;
5226 last
= s
->vma
+ s
->size
;
5229 esym
.asym
.value
= last
;
5231 if (! bfd_ecoff_debug_one_external (abfd
, &debug
, swap
,
5237 for (p
= o
->map_head
.link_order
;
5238 p
!= (struct bfd_link_order
*) NULL
;
5241 asection
*input_section
;
5243 const struct ecoff_debug_swap
*input_swap
;
5244 struct ecoff_debug_info input_debug
;
5248 if (p
->type
!= bfd_indirect_link_order
)
5250 if (p
->type
== bfd_data_link_order
)
5255 input_section
= p
->u
.indirect
.section
;
5256 input_bfd
= input_section
->owner
;
5258 if (! is_alpha_elf (input_bfd
))
5259 /* I don't know what a non ALPHA ELF bfd would be
5260 doing with a .mdebug section, but I don't really
5261 want to deal with it. */
5264 input_swap
= (get_elf_backend_data (input_bfd
)
5265 ->elf_backend_ecoff_debug_swap
);
5267 BFD_ASSERT (p
->size
== input_section
->size
);
5269 /* The ECOFF linking code expects that we have already
5270 read in the debugging information and set up an
5271 ecoff_debug_info structure, so we do that now. */
5272 if (!elf64_alpha_read_ecoff_info (input_bfd
, input_section
,
5276 if (! (bfd_ecoff_debug_accumulate
5277 (mdebug_handle
, abfd
, &debug
, swap
, input_bfd
,
5278 &input_debug
, input_swap
, info
)))
5281 /* Loop through the external symbols. For each one with
5282 interesting information, try to find the symbol in
5283 the linker global hash table and save the information
5284 for the output external symbols. */
5285 eraw_src
= (char *) input_debug
.external_ext
;
5286 eraw_end
= (eraw_src
5287 + (input_debug
.symbolic_header
.iextMax
5288 * input_swap
->external_ext_size
));
5290 eraw_src
< eraw_end
;
5291 eraw_src
+= input_swap
->external_ext_size
)
5295 struct alpha_elf_link_hash_entry
*h
;
5297 (*input_swap
->swap_ext_in
) (input_bfd
, eraw_src
, &ext
);
5298 if (ext
.asym
.sc
== scNil
5299 || ext
.asym
.sc
== scUndefined
5300 || ext
.asym
.sc
== scSUndefined
)
5303 name
= input_debug
.ssext
+ ext
.asym
.iss
;
5304 h
= alpha_elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
5305 if (h
== NULL
|| h
->esym
.ifd
!= -2)
5311 < input_debug
.symbolic_header
.ifdMax
);
5312 ext
.ifd
= input_debug
.ifdmap
[ext
.ifd
];
5318 /* Free up the information we just read. */
5319 free (input_debug
.line
);
5320 free (input_debug
.external_dnr
);
5321 free (input_debug
.external_pdr
);
5322 free (input_debug
.external_sym
);
5323 free (input_debug
.external_opt
);
5324 free (input_debug
.external_aux
);
5325 free (input_debug
.ss
);
5326 free (input_debug
.ssext
);
5327 free (input_debug
.external_fdr
);
5328 free (input_debug
.external_rfd
);
5329 free (input_debug
.external_ext
);
5331 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5332 elf_link_input_bfd ignores this section. */
5333 input_section
->flags
&=~ SEC_HAS_CONTENTS
;
5336 /* Build the external symbol information. */
5339 einfo
.debug
= &debug
;
5341 einfo
.failed
= FALSE
;
5342 elf_link_hash_traverse (elf_hash_table (info
),
5343 elf64_alpha_output_extsym
,
5348 /* Set the size of the .mdebug section. */
5349 o
->size
= bfd_ecoff_debug_size (abfd
, &debug
, swap
);
5351 /* Skip this section later on (I don't think this currently
5352 matters, but someday it might). */
5353 o
->map_head
.link_order
= (struct bfd_link_order
*) NULL
;
5359 /* Invoke the regular ELF backend linker to do all the work. */
5360 if (! bfd_elf_final_link (abfd
, info
))
5363 /* Now write out the computed sections. */
5365 /* The .got subsections... */
5367 bfd
*i
, *dynobj
= elf_hash_table(info
)->dynobj
;
5368 for (i
= htab
->got_list
;
5370 i
= alpha_elf_tdata(i
)->got_link_next
)
5374 /* elf_bfd_final_link already did everything in dynobj. */
5378 sgot
= alpha_elf_tdata(i
)->got
;
5379 if (! bfd_set_section_contents (abfd
, sgot
->output_section
,
5381 (file_ptr
) sgot
->output_offset
,
5387 if (mdebug_sec
!= (asection
*) NULL
)
5389 BFD_ASSERT (abfd
->output_has_begun
);
5390 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle
, abfd
, &debug
,
5392 mdebug_sec
->filepos
))
5395 bfd_ecoff_debug_free (mdebug_handle
, abfd
, &debug
, swap
, info
);
5401 static enum elf_reloc_type_class
5402 elf64_alpha_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5403 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5404 const Elf_Internal_Rela
*rela
)
5406 switch ((int) ELF64_R_TYPE (rela
->r_info
))
5408 case R_ALPHA_RELATIVE
:
5409 return reloc_class_relative
;
5410 case R_ALPHA_JMP_SLOT
:
5411 return reloc_class_plt
;
5413 return reloc_class_copy
;
5415 return reloc_class_normal
;
5419 static const struct bfd_elf_special_section elf64_alpha_special_sections
[] =
5421 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5422 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5423 { NULL
, 0, 0, 0, 0 }
5426 /* ECOFF swapping routines. These are used when dealing with the
5427 .mdebug section, which is in the ECOFF debugging format. Copied
5428 from elf32-mips.c. */
5429 static const struct ecoff_debug_swap
5430 elf64_alpha_ecoff_debug_swap
=
5432 /* Symbol table magic number. */
5434 /* Alignment of debugging information. E.g., 4. */
5436 /* Sizes of external symbolic information. */
5437 sizeof (struct hdr_ext
),
5438 sizeof (struct dnr_ext
),
5439 sizeof (struct pdr_ext
),
5440 sizeof (struct sym_ext
),
5441 sizeof (struct opt_ext
),
5442 sizeof (struct fdr_ext
),
5443 sizeof (struct rfd_ext
),
5444 sizeof (struct ext_ext
),
5445 /* Functions to swap in external symbolic data. */
5454 _bfd_ecoff_swap_tir_in
,
5455 _bfd_ecoff_swap_rndx_in
,
5456 /* Functions to swap out external symbolic data. */
5465 _bfd_ecoff_swap_tir_out
,
5466 _bfd_ecoff_swap_rndx_out
,
5467 /* Function to read in symbolic data. */
5468 elf64_alpha_read_ecoff_info
5471 /* Use a non-standard hash bucket size of 8. */
5473 static const struct elf_size_info alpha_elf_size_info
=
5475 sizeof (Elf64_External_Ehdr
),
5476 sizeof (Elf64_External_Phdr
),
5477 sizeof (Elf64_External_Shdr
),
5478 sizeof (Elf64_External_Rel
),
5479 sizeof (Elf64_External_Rela
),
5480 sizeof (Elf64_External_Sym
),
5481 sizeof (Elf64_External_Dyn
),
5482 sizeof (Elf_External_Note
),
5486 ELFCLASS64
, EV_CURRENT
,
5487 bfd_elf64_write_out_phdrs
,
5488 bfd_elf64_write_shdrs_and_ehdr
,
5489 bfd_elf64_checksum_contents
,
5490 bfd_elf64_write_relocs
,
5491 bfd_elf64_swap_symbol_in
,
5492 bfd_elf64_swap_symbol_out
,
5493 bfd_elf64_slurp_reloc_table
,
5494 bfd_elf64_slurp_symbol_table
,
5495 bfd_elf64_swap_dyn_in
,
5496 bfd_elf64_swap_dyn_out
,
5497 bfd_elf64_swap_reloc_in
,
5498 bfd_elf64_swap_reloc_out
,
5499 bfd_elf64_swap_reloca_in
,
5500 bfd_elf64_swap_reloca_out
5503 #define TARGET_LITTLE_SYM alpha_elf64_vec
5504 #define TARGET_LITTLE_NAME "elf64-alpha"
5505 #define ELF_ARCH bfd_arch_alpha
5506 #define ELF_TARGET_ID ALPHA_ELF_DATA
5507 #define ELF_MACHINE_CODE EM_ALPHA
5508 #define ELF_MAXPAGESIZE 0x10000
5509 #define ELF_COMMONPAGESIZE 0x2000
5511 #define bfd_elf64_bfd_link_hash_table_create \
5512 elf64_alpha_bfd_link_hash_table_create
5514 #define bfd_elf64_bfd_reloc_type_lookup \
5515 elf64_alpha_bfd_reloc_type_lookup
5516 #define bfd_elf64_bfd_reloc_name_lookup \
5517 elf64_alpha_bfd_reloc_name_lookup
5518 #define elf_info_to_howto \
5519 elf64_alpha_info_to_howto
5521 #define bfd_elf64_mkobject \
5522 elf64_alpha_mkobject
5523 #define elf_backend_object_p \
5524 elf64_alpha_object_p
5526 #define elf_backend_section_from_shdr \
5527 elf64_alpha_section_from_shdr
5528 #define elf_backend_section_flags \
5529 elf64_alpha_section_flags
5530 #define elf_backend_fake_sections \
5531 elf64_alpha_fake_sections
5533 #define bfd_elf64_bfd_is_local_label_name \
5534 elf64_alpha_is_local_label_name
5535 #define bfd_elf64_find_nearest_line \
5536 elf64_alpha_find_nearest_line
5537 #define bfd_elf64_bfd_relax_section \
5538 elf64_alpha_relax_section
5540 #define elf_backend_add_symbol_hook \
5541 elf64_alpha_add_symbol_hook
5542 #define elf_backend_relocs_compatible \
5543 _bfd_elf_relocs_compatible
5544 #define elf_backend_sort_relocs_p \
5545 elf64_alpha_sort_relocs_p
5546 #define elf_backend_check_relocs \
5547 elf64_alpha_check_relocs
5548 #define elf_backend_create_dynamic_sections \
5549 elf64_alpha_create_dynamic_sections
5550 #define elf_backend_adjust_dynamic_symbol \
5551 elf64_alpha_adjust_dynamic_symbol
5552 #define elf_backend_merge_symbol_attribute \
5553 elf64_alpha_merge_symbol_attribute
5554 #define elf_backend_copy_indirect_symbol \
5555 elf64_alpha_copy_indirect_symbol
5556 #define elf_backend_always_size_sections \
5557 elf64_alpha_always_size_sections
5558 #define elf_backend_size_dynamic_sections \
5559 elf64_alpha_size_dynamic_sections
5560 #define elf_backend_omit_section_dynsym \
5561 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5562 #define elf_backend_relocate_section \
5563 elf64_alpha_relocate_section
5564 #define elf_backend_finish_dynamic_symbol \
5565 elf64_alpha_finish_dynamic_symbol
5566 #define elf_backend_finish_dynamic_sections \
5567 elf64_alpha_finish_dynamic_sections
5568 #define bfd_elf64_bfd_final_link \
5569 elf64_alpha_final_link
5570 #define elf_backend_reloc_type_class \
5571 elf64_alpha_reloc_type_class
5573 #define elf_backend_can_gc_sections 1
5574 #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
5575 #define elf_backend_gc_sweep_hook elf64_alpha_gc_sweep_hook
5577 #define elf_backend_ecoff_debug_swap \
5578 &elf64_alpha_ecoff_debug_swap
5580 #define elf_backend_size_info \
5583 #define elf_backend_special_sections \
5584 elf64_alpha_special_sections
5586 /* A few constants that determine how the .plt section is set up. */
5587 #define elf_backend_want_got_plt 0
5588 #define elf_backend_plt_readonly 0
5589 #define elf_backend_want_plt_sym 1
5590 #define elf_backend_got_header_size 0
5591 #define elf_backend_dtrel_excludes_plt 1
5593 #include "elf64-target.h"
5595 /* FreeBSD support. */
5597 #undef TARGET_LITTLE_SYM
5598 #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
5599 #undef TARGET_LITTLE_NAME
5600 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5602 #define ELF_OSABI ELFOSABI_FREEBSD
5604 /* The kernel recognizes executables as valid only if they carry a
5605 "FreeBSD" label in the ELF header. So we put this label on all
5606 executables and (for simplicity) also all other object files. */
5609 elf64_alpha_fbsd_post_process_headers (bfd
* abfd
,
5610 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
5612 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
5614 i_ehdrp
= elf_elfheader (abfd
);
5616 /* Put an ABI label supported by FreeBSD >= 4.1. */
5617 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
5618 #ifdef OLD_FREEBSD_ABI_LABEL
5619 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5620 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5624 #undef elf_backend_post_process_headers
5625 #define elf_backend_post_process_headers \
5626 elf64_alpha_fbsd_post_process_headers
5629 #define elf64_bed elf64_alpha_fbsd_bed
5631 #include "elf64-target.h"