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_regular
= 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
)
2882 bfd_boolean relplt
, relocs
;
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
2920 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2924 if (!(s
->flags
& SEC_LINKER_CREATED
))
2927 /* It's OK to base decisions on the section name, because none
2928 of the dynobj section names depend upon the input files. */
2929 name
= bfd_get_section_name (dynobj
, s
);
2931 if (CONST_STRNEQ (name
, ".rela"))
2935 if (strcmp (name
, ".rela.plt") == 0)
2940 /* We use the reloc_count field as a counter if we need
2941 to copy relocs into the output file. */
2945 else if (! CONST_STRNEQ (name
, ".got")
2946 && strcmp (name
, ".plt") != 0
2947 && strcmp (name
, ".dynbss") != 0)
2949 /* It's not one of our dynamic sections, so don't allocate space. */
2955 /* If we don't need this section, strip it from the output file.
2956 This is to handle .rela.bss and .rela.plt. We must create it
2957 in create_dynamic_sections, because it must be created before
2958 the linker maps input sections to output sections. The
2959 linker does that before adjust_dynamic_symbol is called, and
2960 it is that function which decides whether anything needs to
2961 go into these sections. */
2962 if (!CONST_STRNEQ (name
, ".got"))
2963 s
->flags
|= SEC_EXCLUDE
;
2965 else if ((s
->flags
& SEC_HAS_CONTENTS
) != 0)
2967 /* Allocate memory for the section contents. */
2968 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2969 if (s
->contents
== NULL
)
2974 if (elf_hash_table (info
)->dynamic_sections_created
)
2976 /* Add some entries to the .dynamic section. We fill in the
2977 values later, in elf64_alpha_finish_dynamic_sections, but we
2978 must add the entries now so that we get the correct size for
2979 the .dynamic section. The DT_DEBUG entry is filled in by the
2980 dynamic linker and used by the debugger. */
2981 #define add_dynamic_entry(TAG, VAL) \
2982 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2984 if (bfd_link_executable (info
))
2986 if (!add_dynamic_entry (DT_DEBUG
, 0))
2992 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2993 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2994 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2995 || !add_dynamic_entry (DT_JMPREL
, 0))
2998 if (elf64_alpha_use_secureplt
2999 && !add_dynamic_entry (DT_ALPHA_PLTRO
, 1))
3005 if (!add_dynamic_entry (DT_RELA
, 0)
3006 || !add_dynamic_entry (DT_RELASZ
, 0)
3007 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
3010 if (info
->flags
& DF_TEXTREL
)
3012 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3017 #undef add_dynamic_entry
3022 /* These functions do relaxation for Alpha ELF.
3024 Currently I'm only handling what I can do with existing compiler
3025 and assembler support, which means no instructions are removed,
3026 though some may be nopped. At this time GCC does not emit enough
3027 information to do all of the relaxing that is possible. It will
3028 take some not small amount of work for that to happen.
3030 There are a couple of interesting papers that I once read on this
3031 subject, that I cannot find references to at the moment, that
3032 related to Alpha in particular. They are by David Wall, then of
3035 struct alpha_relax_info
3040 Elf_Internal_Shdr
*symtab_hdr
;
3041 Elf_Internal_Rela
*relocs
, *relend
;
3042 struct bfd_link_info
*link_info
;
3046 struct alpha_elf_link_hash_entry
*h
;
3047 struct alpha_elf_got_entry
**first_gotent
;
3048 struct alpha_elf_got_entry
*gotent
;
3049 bfd_boolean changed_contents
;
3050 bfd_boolean changed_relocs
;
3051 unsigned char other
;
3054 static Elf_Internal_Rela
*
3055 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela
*rel
,
3056 Elf_Internal_Rela
*relend
,
3057 bfd_vma offset
, int type
)
3059 while (rel
< relend
)
3061 if (rel
->r_offset
== offset
3062 && ELF64_R_TYPE (rel
->r_info
) == (unsigned int) type
)
3070 elf64_alpha_relax_got_load (struct alpha_relax_info
*info
, bfd_vma symval
,
3071 Elf_Internal_Rela
*irel
, unsigned long r_type
)
3074 bfd_signed_vma disp
;
3076 /* Get the instruction. */
3077 insn
= bfd_get_32 (info
->abfd
, info
->contents
+ irel
->r_offset
);
3079 if (insn
>> 26 != OP_LDQ
)
3081 reloc_howto_type
*howto
= elf64_alpha_howto_table
+ r_type
;
3083 /* xgettext:c-format */
3084 (_("%B: %A+%#Lx: warning: %s relocation against unexpected insn"),
3085 info
->abfd
, info
->sec
, irel
->r_offset
, howto
->name
);
3089 /* Can't relax dynamic symbols. */
3090 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3093 /* Can't use local-exec relocations in shared libraries. */
3094 if (r_type
== R_ALPHA_GOTTPREL
3095 && bfd_link_dll (info
->link_info
))
3098 if (r_type
== R_ALPHA_LITERAL
)
3100 /* Look for nice constant addresses. This includes the not-uncommon
3101 special case of 0 for undefweak symbols. */
3102 if ((info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3103 || (!bfd_link_pic (info
->link_info
)
3104 && (symval
>= (bfd_vma
)-0x8000 || symval
< 0x8000)))
3107 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3108 insn
|= (symval
& 0xffff);
3109 r_type
= R_ALPHA_NONE
;
3113 /* We may only create GPREL relocs during the second pass. */
3114 if (info
->link_info
->relax_pass
== 0)
3117 disp
= symval
- info
->gp
;
3118 insn
= (OP_LDA
<< 26) | (insn
& 0x03ff0000);
3119 r_type
= R_ALPHA_GPREL16
;
3124 bfd_vma dtp_base
, tp_base
;
3126 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3127 dtp_base
= alpha_get_dtprel_base (info
->link_info
);
3128 tp_base
= alpha_get_tprel_base (info
->link_info
);
3129 disp
= symval
- (r_type
== R_ALPHA_GOTDTPREL
? dtp_base
: tp_base
);
3131 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3135 case R_ALPHA_GOTDTPREL
:
3136 r_type
= R_ALPHA_DTPREL16
;
3138 case R_ALPHA_GOTTPREL
:
3139 r_type
= R_ALPHA_TPREL16
;
3147 if (disp
< -0x8000 || disp
>= 0x8000)
3150 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, info
->contents
+ irel
->r_offset
);
3151 info
->changed_contents
= TRUE
;
3153 /* Reduce the use count on this got entry by one, possibly
3155 if (--info
->gotent
->use_count
== 0)
3157 int sz
= alpha_got_entry_size (r_type
);
3158 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3160 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3163 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3164 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
), r_type
);
3165 info
->changed_relocs
= TRUE
;
3167 /* ??? Search forward through this basic block looking for insns
3168 that use the target register. Stop after an insn modifying the
3169 register is seen, or after a branch or call.
3171 Any such memory load insn may be substituted by a load directly
3172 off the GP. This allows the memory load insn to be issued before
3173 the calculated GP register would otherwise be ready.
3175 Any such jsr insn can be replaced by a bsr if it is in range.
3177 This would mean that we'd have to _add_ relocations, the pain of
3178 which gives one pause. */
3184 elf64_alpha_relax_opt_call (struct alpha_relax_info
*info
, bfd_vma symval
)
3186 /* If the function has the same gp, and we can identify that the
3187 function does not use its function pointer, we can eliminate the
3190 /* If the symbol is marked NOPV, we are being told the function never
3191 needs its procedure value. */
3192 if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_NOPV
)
3195 /* If the symbol is marked STD_GP, we are being told the function does
3196 a normal ldgp in the first two words. */
3197 else if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_STD_GPLOAD
)
3200 /* Otherwise, we may be able to identify a GP load in the first two
3201 words, which we can then skip. */
3204 Elf_Internal_Rela
*tsec_relocs
, *tsec_relend
, *tsec_free
, *gpdisp
;
3207 /* Load the relocations from the section that the target symbol is in. */
3208 if (info
->sec
== info
->tsec
)
3210 tsec_relocs
= info
->relocs
;
3211 tsec_relend
= info
->relend
;
3216 tsec_relocs
= (_bfd_elf_link_read_relocs
3217 (info
->abfd
, info
->tsec
, NULL
,
3218 (Elf_Internal_Rela
*) NULL
,
3219 info
->link_info
->keep_memory
));
3220 if (tsec_relocs
== NULL
)
3222 tsec_relend
= tsec_relocs
+ info
->tsec
->reloc_count
;
3223 tsec_free
= (elf_section_data (info
->tsec
)->relocs
== tsec_relocs
3228 /* Recover the symbol's offset within the section. */
3229 ofs
= (symval
- info
->tsec
->output_section
->vma
3230 - info
->tsec
->output_offset
);
3232 /* Look for a GPDISP reloc. */
3233 gpdisp
= (elf64_alpha_find_reloc_at_ofs
3234 (tsec_relocs
, tsec_relend
, ofs
, R_ALPHA_GPDISP
));
3236 if (!gpdisp
|| gpdisp
->r_addend
!= 4)
3246 /* We've now determined that we can skip an initial gp load. Verify
3247 that the call and the target use the same gp. */
3248 if (info
->link_info
->output_bfd
->xvec
!= info
->tsec
->owner
->xvec
3249 || info
->gotobj
!= alpha_elf_tdata (info
->tsec
->owner
)->gotobj
)
3256 elf64_alpha_relax_with_lituse (struct alpha_relax_info
*info
,
3257 bfd_vma symval
, Elf_Internal_Rela
*irel
)
3259 Elf_Internal_Rela
*urel
, *erel
, *irelend
= info
->relend
;
3261 bfd_signed_vma disp
;
3264 bfd_boolean lit_reused
= FALSE
;
3265 bfd_boolean all_optimized
= TRUE
;
3266 bfd_boolean changed_contents
;
3267 bfd_boolean changed_relocs
;
3268 bfd_byte
*contents
= info
->contents
;
3269 bfd
*abfd
= info
->abfd
;
3270 bfd_vma sec_output_vma
;
3271 unsigned int lit_insn
;
3274 lit_insn
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
3275 if (lit_insn
>> 26 != OP_LDQ
)
3278 /* xgettext:c-format */
3279 (_("%B: %A+%#Lx: warning: LITERAL relocation against unexpected insn"),
3280 abfd
, info
->sec
, irel
->r_offset
);
3284 /* Can't relax dynamic symbols. */
3285 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3288 changed_contents
= info
->changed_contents
;
3289 changed_relocs
= info
->changed_relocs
;
3290 sec_output_vma
= info
->sec
->output_section
->vma
+ info
->sec
->output_offset
;
3291 relax_pass
= info
->link_info
->relax_pass
;
3293 /* Summarize how this particular LITERAL is used. */
3294 for (erel
= irel
+1, flags
= 0; erel
< irelend
; ++erel
)
3296 if (ELF64_R_TYPE (erel
->r_info
) != R_ALPHA_LITUSE
)
3298 if (erel
->r_addend
<= 6)
3299 flags
|= 1 << erel
->r_addend
;
3302 /* A little preparation for the loop... */
3303 disp
= symval
- info
->gp
;
3305 for (urel
= irel
+1; urel
< erel
; ++urel
)
3307 bfd_vma urel_r_offset
= urel
->r_offset
;
3310 bfd_signed_vma xdisp
;
3311 Elf_Internal_Rela nrel
;
3313 insn
= bfd_get_32 (abfd
, contents
+ urel_r_offset
);
3315 switch (urel
->r_addend
)
3317 case LITUSE_ALPHA_ADDR
:
3319 /* This type is really just a placeholder to note that all
3320 uses cannot be optimized, but to still allow some. */
3321 all_optimized
= FALSE
;
3324 case LITUSE_ALPHA_BASE
:
3325 /* We may only create GPREL relocs during the second pass. */
3326 if (relax_pass
== 0)
3328 all_optimized
= FALSE
;
3332 /* We can always optimize 16-bit displacements. */
3334 /* Extract the displacement from the instruction, sign-extending
3335 it if necessary, then test whether it is within 16 or 32 bits
3336 displacement from GP. */
3337 insn_disp
= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
3339 xdisp
= disp
+ insn_disp
;
3340 fits16
= (xdisp
>= - (bfd_signed_vma
) 0x8000 && xdisp
< 0x8000);
3341 fits32
= (xdisp
>= - (bfd_signed_vma
) 0x80000000
3342 && xdisp
< 0x7fff8000);
3346 /* Take the op code and dest from this insn, take the base
3347 register from the literal insn. Leave the offset alone. */
3348 insn
= (insn
& 0xffe0ffff) | (lit_insn
& 0x001f0000);
3349 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3350 changed_contents
= TRUE
;
3353 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3355 nrel
.r_addend
= irel
->r_addend
;
3357 /* As we adjust, move the reloc to the end so that we don't
3358 break the LITERAL+LITUSE chain. */
3362 changed_relocs
= TRUE
;
3365 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3366 else if (fits32
&& !(flags
& ~6))
3368 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3370 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3372 lit_insn
= (OP_LDAH
<< 26) | (lit_insn
& 0x03ff0000);
3373 bfd_put_32 (abfd
, (bfd_vma
) lit_insn
, contents
+ irel
->r_offset
);
3375 changed_contents
= TRUE
;
3377 /* Since all relocs must be optimized, don't bother swapping
3378 this relocation to the end. */
3379 urel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3381 urel
->r_addend
= irel
->r_addend
;
3382 changed_relocs
= TRUE
;
3385 all_optimized
= FALSE
;
3388 case LITUSE_ALPHA_BYTOFF
:
3389 /* We can always optimize byte instructions. */
3391 /* FIXME: sanity check the insn for byte op. Check that the
3392 literal dest reg is indeed Rb in the byte insn. */
3394 insn
&= ~ (unsigned) 0x001ff000;
3395 insn
|= ((symval
& 7) << 13) | 0x1000;
3396 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3397 changed_contents
= TRUE
;
3400 nrel
.r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3403 /* As we adjust, move the reloc to the end so that we don't
3404 break the LITERAL+LITUSE chain. */
3408 changed_relocs
= TRUE
;
3411 case LITUSE_ALPHA_JSR
:
3412 case LITUSE_ALPHA_TLSGD
:
3413 case LITUSE_ALPHA_TLSLDM
:
3414 case LITUSE_ALPHA_JSRDIRECT
:
3416 bfd_vma optdest
, org
;
3417 bfd_signed_vma odisp
;
3419 /* For undefined weak symbols, we're mostly interested in getting
3420 rid of the got entry whenever possible, so optimize this to a
3421 use of the zero register. */
3422 if (info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3425 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3427 changed_contents
= TRUE
;
3431 /* If not zero, place to jump without needing pv. */
3432 optdest
= elf64_alpha_relax_opt_call (info
, symval
);
3433 org
= sec_output_vma
+ urel_r_offset
+ 4;
3434 odisp
= (optdest
? optdest
: symval
) - org
;
3436 if (odisp
>= -0x400000 && odisp
< 0x400000)
3438 Elf_Internal_Rela
*xrel
;
3440 /* Preserve branch prediction call stack when possible. */
3441 if ((insn
& INSN_JSR_MASK
) == INSN_JSR
)
3442 insn
= (OP_BSR
<< 26) | (insn
& 0x03e00000);
3444 insn
= (OP_BR
<< 26) | (insn
& 0x03e00000);
3445 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3446 changed_contents
= TRUE
;
3449 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3451 nrel
.r_addend
= irel
->r_addend
;
3454 nrel
.r_addend
+= optdest
- symval
;
3456 all_optimized
= FALSE
;
3458 /* Kill any HINT reloc that might exist for this insn. */
3459 xrel
= (elf64_alpha_find_reloc_at_ofs
3460 (info
->relocs
, info
->relend
, urel_r_offset
,
3463 xrel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3465 /* As we adjust, move the reloc to the end so that we don't
3466 break the LITERAL+LITUSE chain. */
3471 info
->changed_relocs
= TRUE
;
3474 all_optimized
= FALSE
;
3476 /* Even if the target is not in range for a direct branch,
3477 if we share a GP, we can eliminate the gp reload. */
3480 Elf_Internal_Rela
*gpdisp
3481 = (elf64_alpha_find_reloc_at_ofs
3482 (info
->relocs
, irelend
, urel_r_offset
+ 4,
3486 bfd_byte
*p_ldah
= contents
+ gpdisp
->r_offset
;
3487 bfd_byte
*p_lda
= p_ldah
+ gpdisp
->r_addend
;
3488 unsigned int ldah
= bfd_get_32 (abfd
, p_ldah
);
3489 unsigned int lda
= bfd_get_32 (abfd
, p_lda
);
3491 /* Verify that the instruction is "ldah $29,0($26)".
3492 Consider a function that ends in a noreturn call,
3493 and that the next function begins with an ldgp,
3494 and that by accident there is no padding between.
3495 In that case the insn would use $27 as the base. */
3496 if (ldah
== 0x27ba0000 && lda
== 0x23bd0000)
3498 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_ldah
);
3499 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_lda
);
3501 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3502 changed_contents
= TRUE
;
3503 changed_relocs
= TRUE
;
3512 /* If we reused the literal instruction, we must have optimized all. */
3513 BFD_ASSERT(!lit_reused
|| all_optimized
);
3515 /* If all cases were optimized, we can reduce the use count on this
3516 got entry by one, possibly eliminating it. */
3519 if (--info
->gotent
->use_count
== 0)
3521 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3522 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3524 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3527 /* If the literal instruction is no longer needed (it may have been
3528 reused. We can eliminate it. */
3529 /* ??? For now, I don't want to deal with compacting the section,
3530 so just nop it out. */
3533 irel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3534 changed_relocs
= TRUE
;
3536 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, contents
+ irel
->r_offset
);
3537 changed_contents
= TRUE
;
3541 info
->changed_contents
= changed_contents
;
3542 info
->changed_relocs
= changed_relocs
;
3544 if (all_optimized
|| relax_pass
== 0)
3546 return elf64_alpha_relax_got_load (info
, symval
, irel
, R_ALPHA_LITERAL
);
3550 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info
*info
, bfd_vma symval
,
3551 Elf_Internal_Rela
*irel
, bfd_boolean is_gd
)
3554 unsigned int insn
, tlsgd_reg
;
3555 Elf_Internal_Rela
*gpdisp
, *hint
;
3556 bfd_boolean dynamic
, use_gottprel
;
3557 unsigned long new_symndx
;
3559 dynamic
= alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
);
3561 /* If a TLS symbol is accessed using IE at least once, there is no point
3562 to use dynamic model for it. */
3563 if (is_gd
&& info
->h
&& (info
->h
->flags
& ALPHA_ELF_LINK_HASH_TLS_IE
))
3566 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3567 then we might as well relax to IE. */
3568 else if (bfd_link_pic (info
->link_info
) && !dynamic
3569 && (info
->link_info
->flags
& DF_STATIC_TLS
))
3572 /* Otherwise we must be building an executable to do anything. */
3573 else if (bfd_link_pic (info
->link_info
))
3576 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3577 the matching LITUSE_TLS relocations. */
3578 if (irel
+ 2 >= info
->relend
)
3580 if (ELF64_R_TYPE (irel
[1].r_info
) != R_ALPHA_LITERAL
3581 || ELF64_R_TYPE (irel
[2].r_info
) != R_ALPHA_LITUSE
3582 || irel
[2].r_addend
!= (is_gd
? LITUSE_ALPHA_TLSGD
: LITUSE_ALPHA_TLSLDM
))
3585 /* There must be a GPDISP relocation positioned immediately after the
3586 LITUSE relocation. */
3587 gpdisp
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3588 irel
[2].r_offset
+ 4, R_ALPHA_GPDISP
);
3592 pos
[0] = info
->contents
+ irel
[0].r_offset
;
3593 pos
[1] = info
->contents
+ irel
[1].r_offset
;
3594 pos
[2] = info
->contents
+ irel
[2].r_offset
;
3595 pos
[3] = info
->contents
+ gpdisp
->r_offset
;
3596 pos
[4] = pos
[3] + gpdisp
->r_addend
;
3598 /* Beware of the compiler hoisting part of the sequence out a loop
3599 and adjusting the destination register for the TLSGD insn. If this
3600 happens, there will be a move into $16 before the JSR insn, so only
3601 transformations of the first insn pair should use this register. */
3602 tlsgd_reg
= bfd_get_32 (info
->abfd
, pos
[0]);
3603 tlsgd_reg
= (tlsgd_reg
>> 21) & 31;
3605 /* Generally, the positions are not allowed to be out of order, lest the
3606 modified insn sequence have different register lifetimes. We can make
3607 an exception when pos 1 is adjacent to pos 0. */
3608 if (pos
[1] + 4 == pos
[0])
3610 bfd_byte
*tmp
= pos
[0];
3614 if (pos
[1] >= pos
[2] || pos
[2] >= pos
[3])
3617 /* Reduce the use count on the LITERAL relocation. Do this before we
3618 smash the symndx when we adjust the relocations below. */
3620 struct alpha_elf_got_entry
*lit_gotent
;
3621 struct alpha_elf_link_hash_entry
*lit_h
;
3624 BFD_ASSERT (ELF64_R_SYM (irel
[1].r_info
) >= info
->symtab_hdr
->sh_info
);
3625 indx
= ELF64_R_SYM (irel
[1].r_info
) - info
->symtab_hdr
->sh_info
;
3626 lit_h
= alpha_elf_sym_hashes (info
->abfd
)[indx
];
3628 while (lit_h
->root
.root
.type
== bfd_link_hash_indirect
3629 || lit_h
->root
.root
.type
== bfd_link_hash_warning
)
3630 lit_h
= (struct alpha_elf_link_hash_entry
*) lit_h
->root
.root
.u
.i
.link
;
3632 for (lit_gotent
= lit_h
->got_entries
; lit_gotent
;
3633 lit_gotent
= lit_gotent
->next
)
3634 if (lit_gotent
->gotobj
== info
->gotobj
3635 && lit_gotent
->reloc_type
== R_ALPHA_LITERAL
3636 && lit_gotent
->addend
== irel
[1].r_addend
)
3638 BFD_ASSERT (lit_gotent
);
3640 if (--lit_gotent
->use_count
== 0)
3642 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3643 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3649 lda $16,x($gp) !tlsgd!1
3650 ldq $27,__tls_get_addr($gp) !literal!1
3651 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3652 ldah $29,0($26) !gpdisp!2
3653 lda $29,0($29) !gpdisp!2
3655 ldq $16,x($gp) !gottprel
3660 or the first pair to
3661 lda $16,x($gp) !tprel
3664 ldah $16,x($gp) !tprelhi
3665 lda $16,x($16) !tprello
3669 use_gottprel
= FALSE
;
3670 new_symndx
= is_gd
? ELF64_R_SYM (irel
->r_info
) : STN_UNDEF
;
3672 /* Some compilers warn about a Boolean-looking expression being
3673 used in a switch. The explicit cast silences them. */
3674 switch ((int) (!dynamic
&& !bfd_link_pic (info
->link_info
)))
3679 bfd_signed_vma disp
;
3681 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3682 tp_base
= alpha_get_tprel_base (info
->link_info
);
3683 disp
= symval
- tp_base
;
3685 if (disp
>= -0x8000 && disp
< 0x8000)
3687 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3688 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3689 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3691 irel
[0].r_offset
= pos
[0] - info
->contents
;
3692 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPREL16
);
3693 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3696 else if (disp
>= -(bfd_signed_vma
) 0x80000000
3697 && disp
< (bfd_signed_vma
) 0x7fff8000
3698 && pos
[0] + 4 == pos
[1])
3700 insn
= (OP_LDAH
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3701 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3702 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (tlsgd_reg
<< 16);
3703 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[1]);
3705 irel
[0].r_offset
= pos
[0] - info
->contents
;
3706 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELHI
);
3707 irel
[1].r_offset
= pos
[1] - info
->contents
;
3708 irel
[1].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELLO
);
3715 use_gottprel
= TRUE
;
3717 insn
= (OP_LDQ
<< 26) | (tlsgd_reg
<< 21) | (29 << 16);
3718 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3719 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3721 irel
[0].r_offset
= pos
[0] - info
->contents
;
3722 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_GOTTPREL
);
3723 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3727 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_RDUNIQ
, pos
[2]);
3729 insn
= INSN_ADDQ
| (16 << 21) | (0 << 16) | (0 << 0);
3730 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[3]);
3732 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[4]);
3734 irel
[2].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3735 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3737 hint
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3738 irel
[2].r_offset
, R_ALPHA_HINT
);
3740 hint
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3742 info
->changed_contents
= TRUE
;
3743 info
->changed_relocs
= TRUE
;
3745 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3746 if (--info
->gotent
->use_count
== 0)
3748 int sz
= alpha_got_entry_size (info
->gotent
->reloc_type
);
3749 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3751 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3754 /* If we've switched to a GOTTPREL relocation, increment the reference
3755 count on that got entry. */
3758 struct alpha_elf_got_entry
*tprel_gotent
;
3760 for (tprel_gotent
= *info
->first_gotent
; tprel_gotent
;
3761 tprel_gotent
= tprel_gotent
->next
)
3762 if (tprel_gotent
->gotobj
== info
->gotobj
3763 && tprel_gotent
->reloc_type
== R_ALPHA_GOTTPREL
3764 && tprel_gotent
->addend
== irel
->r_addend
)
3767 tprel_gotent
->use_count
++;
3770 if (info
->gotent
->use_count
== 0)
3771 tprel_gotent
= info
->gotent
;
3774 tprel_gotent
= (struct alpha_elf_got_entry
*)
3775 bfd_alloc (info
->abfd
, sizeof (struct alpha_elf_got_entry
));
3779 tprel_gotent
->next
= *info
->first_gotent
;
3780 *info
->first_gotent
= tprel_gotent
;
3782 tprel_gotent
->gotobj
= info
->gotobj
;
3783 tprel_gotent
->addend
= irel
->r_addend
;
3784 tprel_gotent
->got_offset
= -1;
3785 tprel_gotent
->reloc_done
= 0;
3786 tprel_gotent
->reloc_xlated
= 0;
3789 tprel_gotent
->use_count
= 1;
3790 tprel_gotent
->reloc_type
= R_ALPHA_GOTTPREL
;
3798 elf64_alpha_relax_section (bfd
*abfd
, asection
*sec
,
3799 struct bfd_link_info
*link_info
, bfd_boolean
*again
)
3801 Elf_Internal_Shdr
*symtab_hdr
;
3802 Elf_Internal_Rela
*internal_relocs
;
3803 Elf_Internal_Rela
*irel
, *irelend
;
3804 Elf_Internal_Sym
*isymbuf
= NULL
;
3805 struct alpha_elf_got_entry
**local_got_entries
;
3806 struct alpha_relax_info info
;
3807 struct alpha_elf_link_hash_table
* htab
;
3810 htab
= alpha_elf_hash_table (link_info
);
3814 /* There's nothing to change, yet. */
3817 if (bfd_link_relocatable (link_info
)
3818 || ((sec
->flags
& (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3819 != (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3820 || sec
->reloc_count
== 0)
3823 BFD_ASSERT (is_alpha_elf (abfd
));
3824 relax_pass
= link_info
->relax_pass
;
3826 /* Make sure our GOT and PLT tables are up-to-date. */
3827 if (htab
->relax_trip
!= link_info
->relax_trip
)
3829 htab
->relax_trip
= link_info
->relax_trip
;
3831 /* This should never fail after the initial round, since the only error
3832 is GOT overflow, and relaxation only shrinks the table. However, we
3833 may only merge got sections during the first pass. If we merge
3834 sections after we've created GPREL relocs, the GP for the merged
3835 section backs up which may put the relocs out of range. */
3836 if (!elf64_alpha_size_got_sections (link_info
, relax_pass
== 0))
3838 if (elf_hash_table (link_info
)->dynamic_sections_created
)
3840 elf64_alpha_size_plt_section (link_info
);
3841 elf64_alpha_size_rela_got_section (link_info
);
3845 symtab_hdr
= &elf_symtab_hdr (abfd
);
3846 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
3848 /* Load the relocations for this section. */
3849 internal_relocs
= (_bfd_elf_link_read_relocs
3850 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3851 link_info
->keep_memory
));
3852 if (internal_relocs
== NULL
)
3855 memset(&info
, 0, sizeof (info
));
3858 info
.link_info
= link_info
;
3859 info
.symtab_hdr
= symtab_hdr
;
3860 info
.relocs
= internal_relocs
;
3861 info
.relend
= irelend
= internal_relocs
+ sec
->reloc_count
;
3863 /* Find the GP for this object. Do not store the result back via
3864 _bfd_set_gp_value, since this could change again before final. */
3865 info
.gotobj
= alpha_elf_tdata (abfd
)->gotobj
;
3868 asection
*sgot
= alpha_elf_tdata (info
.gotobj
)->got
;
3869 info
.gp
= (sgot
->output_section
->vma
3870 + sgot
->output_offset
3874 /* Get the section contents. */
3875 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3876 info
.contents
= elf_section_data (sec
)->this_hdr
.contents
;
3879 if (!bfd_malloc_and_get_section (abfd
, sec
, &info
.contents
))
3883 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3886 struct alpha_elf_got_entry
*gotent
;
3887 unsigned long r_type
= ELF64_R_TYPE (irel
->r_info
);
3888 unsigned long r_symndx
= ELF64_R_SYM (irel
->r_info
);
3890 /* Early exit for unhandled or unrelaxable relocations. */
3891 if (r_type
!= R_ALPHA_LITERAL
)
3893 /* We complete everything except LITERAL in the first pass. */
3894 if (relax_pass
!= 0)
3896 if (r_type
== R_ALPHA_TLSLDM
)
3898 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3899 reloc to the STN_UNDEF (0) symbol so that they all match. */
3900 r_symndx
= STN_UNDEF
;
3902 else if (r_type
!= R_ALPHA_GOTDTPREL
3903 && r_type
!= R_ALPHA_GOTTPREL
3904 && r_type
!= R_ALPHA_TLSGD
)
3908 /* Get the value of the symbol referred to by the reloc. */
3909 if (r_symndx
< symtab_hdr
->sh_info
)
3911 /* A local symbol. */
3912 Elf_Internal_Sym
*isym
;
3914 /* Read this BFD's local symbols. */
3915 if (isymbuf
== NULL
)
3917 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3918 if (isymbuf
== NULL
)
3919 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
3920 symtab_hdr
->sh_info
, 0,
3922 if (isymbuf
== NULL
)
3926 isym
= isymbuf
+ r_symndx
;
3928 /* Given the symbol for a TLSLDM reloc is ignored, this also
3929 means forcing the symbol value to the tp base. */
3930 if (r_type
== R_ALPHA_TLSLDM
)
3932 info
.tsec
= bfd_abs_section_ptr
;
3933 symval
= alpha_get_tprel_base (info
.link_info
);
3937 symval
= isym
->st_value
;
3938 if (isym
->st_shndx
== SHN_UNDEF
)
3940 else if (isym
->st_shndx
== SHN_ABS
)
3941 info
.tsec
= bfd_abs_section_ptr
;
3942 else if (isym
->st_shndx
== SHN_COMMON
)
3943 info
.tsec
= bfd_com_section_ptr
;
3945 info
.tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3949 info
.other
= isym
->st_other
;
3950 if (local_got_entries
)
3951 info
.first_gotent
= &local_got_entries
[r_symndx
];
3954 info
.first_gotent
= &info
.gotent
;
3961 struct alpha_elf_link_hash_entry
*h
;
3963 indx
= r_symndx
- symtab_hdr
->sh_info
;
3964 h
= alpha_elf_sym_hashes (abfd
)[indx
];
3965 BFD_ASSERT (h
!= NULL
);
3967 while (h
->root
.root
.type
== bfd_link_hash_indirect
3968 || h
->root
.root
.type
== bfd_link_hash_warning
)
3969 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
3971 /* If the symbol is undefined, we can't do anything with it. */
3972 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
3975 /* If the symbol isn't defined in the current module,
3976 again we can't do anything. */
3977 if (h
->root
.root
.type
== bfd_link_hash_undefweak
)
3979 info
.tsec
= bfd_abs_section_ptr
;
3982 else if (!h
->root
.def_regular
)
3984 /* Except for TLSGD relocs, which can sometimes be
3985 relaxed to GOTTPREL relocs. */
3986 if (r_type
!= R_ALPHA_TLSGD
)
3988 info
.tsec
= bfd_abs_section_ptr
;
3993 info
.tsec
= h
->root
.root
.u
.def
.section
;
3994 symval
= h
->root
.root
.u
.def
.value
;
3998 info
.other
= h
->root
.other
;
3999 info
.first_gotent
= &h
->got_entries
;
4002 /* Search for the got entry to be used by this relocation. */
4003 for (gotent
= *info
.first_gotent
; gotent
; gotent
= gotent
->next
)
4004 if (gotent
->gotobj
== info
.gotobj
4005 && gotent
->reloc_type
== r_type
4006 && gotent
->addend
== irel
->r_addend
)
4008 info
.gotent
= gotent
;
4010 symval
+= info
.tsec
->output_section
->vma
+ info
.tsec
->output_offset
;
4011 symval
+= irel
->r_addend
;
4015 case R_ALPHA_LITERAL
:
4016 BFD_ASSERT(info
.gotent
!= NULL
);
4018 /* If there exist LITUSE relocations immediately following, this
4019 opens up all sorts of interesting optimizations, because we
4020 now know every location that this address load is used. */
4021 if (irel
+1 < irelend
4022 && ELF64_R_TYPE (irel
[1].r_info
) == R_ALPHA_LITUSE
)
4024 if (!elf64_alpha_relax_with_lituse (&info
, symval
, irel
))
4029 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
4034 case R_ALPHA_GOTDTPREL
:
4035 case R_ALPHA_GOTTPREL
:
4036 BFD_ASSERT(info
.gotent
!= NULL
);
4037 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
4042 case R_ALPHA_TLSLDM
:
4043 BFD_ASSERT(info
.gotent
!= NULL
);
4044 if (!elf64_alpha_relax_tls_get_addr (&info
, symval
, irel
,
4045 r_type
== R_ALPHA_TLSGD
))
4052 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4054 if (!link_info
->keep_memory
)
4058 /* Cache the symbols for elf_link_input_bfd. */
4059 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
4063 if (info
.contents
!= NULL
4064 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4066 if (!info
.changed_contents
&& !link_info
->keep_memory
)
4067 free (info
.contents
);
4070 /* Cache the section contents for elf_link_input_bfd. */
4071 elf_section_data (sec
)->this_hdr
.contents
= info
.contents
;
4075 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
4077 if (!info
.changed_relocs
)
4078 free (internal_relocs
);
4080 elf_section_data (sec
)->relocs
= internal_relocs
;
4083 *again
= info
.changed_contents
|| info
.changed_relocs
;
4089 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4091 if (info
.contents
!= NULL
4092 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4093 free (info
.contents
);
4094 if (internal_relocs
!= NULL
4095 && elf_section_data (sec
)->relocs
!= internal_relocs
)
4096 free (internal_relocs
);
4100 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4101 into the next available slot in SREL. */
4104 elf64_alpha_emit_dynrel (bfd
*abfd
, struct bfd_link_info
*info
,
4105 asection
*sec
, asection
*srel
, bfd_vma offset
,
4106 long dynindx
, long rtype
, bfd_vma addend
)
4108 Elf_Internal_Rela outrel
;
4111 BFD_ASSERT (srel
!= NULL
);
4113 outrel
.r_info
= ELF64_R_INFO (dynindx
, rtype
);
4114 outrel
.r_addend
= addend
;
4116 offset
= _bfd_elf_section_offset (abfd
, info
, sec
, offset
);
4117 if ((offset
| 1) != (bfd_vma
) -1)
4118 outrel
.r_offset
= sec
->output_section
->vma
+ sec
->output_offset
+ offset
;
4120 memset (&outrel
, 0, sizeof (outrel
));
4122 loc
= srel
->contents
;
4123 loc
+= srel
->reloc_count
++ * sizeof (Elf64_External_Rela
);
4124 bfd_elf64_swap_reloca_out (abfd
, &outrel
, loc
);
4125 BFD_ASSERT (sizeof (Elf64_External_Rela
) * srel
->reloc_count
<= srel
->size
);
4128 /* Relocate an Alpha ELF section for a relocatable link.
4130 We don't have to change anything unless the reloc is against a section
4131 symbol, in which case we have to adjust according to where the section
4132 symbol winds up in the output section. */
4135 elf64_alpha_relocate_section_r (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4136 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4137 bfd
*input_bfd
, asection
*input_section
,
4138 bfd_byte
*contents ATTRIBUTE_UNUSED
,
4139 Elf_Internal_Rela
*relocs
,
4140 Elf_Internal_Sym
*local_syms
,
4141 asection
**local_sections
)
4143 unsigned long symtab_hdr_sh_info
;
4144 Elf_Internal_Rela
*rel
;
4145 Elf_Internal_Rela
*relend
;
4146 struct elf_link_hash_entry
**sym_hashes
;
4147 bfd_boolean ret_val
= TRUE
;
4149 symtab_hdr_sh_info
= elf_symtab_hdr (input_bfd
).sh_info
;
4150 sym_hashes
= elf_sym_hashes (input_bfd
);
4152 relend
= relocs
+ input_section
->reloc_count
;
4153 for (rel
= relocs
; rel
< relend
; rel
++)
4155 unsigned long r_symndx
;
4156 Elf_Internal_Sym
*sym
;
4158 unsigned long r_type
;
4160 r_type
= ELF64_R_TYPE (rel
->r_info
);
4161 if (r_type
>= R_ALPHA_max
)
4164 /* xgettext:c-format */
4165 (_("%B: unknown relocation type %d"),
4166 input_bfd
, (int) r_type
);
4167 bfd_set_error (bfd_error_bad_value
);
4172 /* The symbol associated with GPDISP and LITUSE is
4173 immaterial. Only the addend is significant. */
4174 if (r_type
== R_ALPHA_GPDISP
|| r_type
== R_ALPHA_LITUSE
)
4177 r_symndx
= ELF64_R_SYM (rel
->r_info
);
4178 if (r_symndx
< symtab_hdr_sh_info
)
4180 sym
= local_syms
+ r_symndx
;
4181 sec
= local_sections
[r_symndx
];
4185 struct elf_link_hash_entry
*h
;
4187 h
= sym_hashes
[r_symndx
- symtab_hdr_sh_info
];
4189 while (h
->root
.type
== bfd_link_hash_indirect
4190 || h
->root
.type
== bfd_link_hash_warning
)
4191 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4193 if (h
->root
.type
!= bfd_link_hash_defined
4194 && h
->root
.type
!= bfd_link_hash_defweak
)
4198 sec
= h
->root
.u
.def
.section
;
4201 if (sec
!= NULL
&& discarded_section (sec
))
4202 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4204 elf64_alpha_howto_table
+ r_type
, 0,
4207 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
4208 rel
->r_addend
+= sec
->output_offset
;
4214 /* Relocate an Alpha ELF section. */
4217 elf64_alpha_relocate_section (bfd
*output_bfd
, struct bfd_link_info
*info
,
4218 bfd
*input_bfd
, asection
*input_section
,
4219 bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
4220 Elf_Internal_Sym
*local_syms
,
4221 asection
**local_sections
)
4223 Elf_Internal_Shdr
*symtab_hdr
;
4224 Elf_Internal_Rela
*rel
;
4225 Elf_Internal_Rela
*relend
;
4226 asection
*sgot
, *srel
, *srelgot
;
4227 bfd
*dynobj
, *gotobj
;
4228 bfd_vma gp
, tp_base
, dtp_base
;
4229 struct alpha_elf_got_entry
**local_got_entries
;
4230 bfd_boolean ret_val
;
4232 BFD_ASSERT (is_alpha_elf (input_bfd
));
4234 /* Handle relocatable links with a smaller loop. */
4235 if (bfd_link_relocatable (info
))
4236 return elf64_alpha_relocate_section_r (output_bfd
, info
, input_bfd
,
4237 input_section
, contents
, relocs
,
4238 local_syms
, local_sections
);
4240 /* This is a final link. */
4244 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4246 dynobj
= elf_hash_table (info
)->dynobj
;
4247 srelgot
= elf_hash_table (info
)->srelgot
;
4249 if (input_section
->flags
& SEC_ALLOC
)
4251 const char *section_name
;
4252 section_name
= (bfd_elf_string_from_elf_section
4253 (input_bfd
, elf_elfheader(input_bfd
)->e_shstrndx
,
4254 _bfd_elf_single_rel_hdr (input_section
)->sh_name
));
4255 BFD_ASSERT(section_name
!= NULL
);
4256 srel
= bfd_get_linker_section (dynobj
, section_name
);
4261 /* Find the gp value for this input bfd. */
4262 gotobj
= alpha_elf_tdata (input_bfd
)->gotobj
;
4265 sgot
= alpha_elf_tdata (gotobj
)->got
;
4266 gp
= _bfd_get_gp_value (gotobj
);
4269 gp
= (sgot
->output_section
->vma
4270 + sgot
->output_offset
4272 _bfd_set_gp_value (gotobj
, gp
);
4281 local_got_entries
= alpha_elf_tdata(input_bfd
)->local_got_entries
;
4283 if (elf_hash_table (info
)->tls_sec
!= NULL
)
4285 dtp_base
= alpha_get_dtprel_base (info
);
4286 tp_base
= alpha_get_tprel_base (info
);
4289 dtp_base
= tp_base
= 0;
4291 relend
= relocs
+ input_section
->reloc_count
;
4292 for (rel
= relocs
; rel
< relend
; rel
++)
4294 struct alpha_elf_link_hash_entry
*h
= NULL
;
4295 struct alpha_elf_got_entry
*gotent
;
4296 bfd_reloc_status_type r
;
4297 reloc_howto_type
*howto
;
4298 unsigned long r_symndx
;
4299 Elf_Internal_Sym
*sym
= NULL
;
4300 asection
*sec
= NULL
;
4303 bfd_boolean dynamic_symbol_p
;
4304 bfd_boolean unresolved_reloc
= FALSE
;
4305 bfd_boolean undef_weak_ref
= FALSE
;
4306 unsigned long r_type
;
4308 r_type
= ELF64_R_TYPE(rel
->r_info
);
4309 if (r_type
>= R_ALPHA_max
)
4312 /* xgettext:c-format */
4313 (_("%B: unknown relocation type %d"),
4314 input_bfd
, (int) r_type
);
4315 bfd_set_error (bfd_error_bad_value
);
4320 howto
= elf64_alpha_howto_table
+ r_type
;
4321 r_symndx
= ELF64_R_SYM(rel
->r_info
);
4323 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4324 reloc to the STN_UNDEF (0) symbol so that they all match. */
4325 if (r_type
== R_ALPHA_TLSLDM
)
4326 r_symndx
= STN_UNDEF
;
4328 if (r_symndx
< symtab_hdr
->sh_info
)
4331 sym
= local_syms
+ r_symndx
;
4332 sec
= local_sections
[r_symndx
];
4334 value
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &msec
, rel
);
4336 /* If this is a tp-relative relocation against sym STN_UNDEF (0),
4337 this is hackery from relax_section. Force the value to
4338 be the tls module base. */
4339 if (r_symndx
== STN_UNDEF
4340 && (r_type
== R_ALPHA_TLSLDM
4341 || r_type
== R_ALPHA_GOTTPREL
4342 || r_type
== R_ALPHA_TPREL64
4343 || r_type
== R_ALPHA_TPRELHI
4344 || r_type
== R_ALPHA_TPRELLO
4345 || r_type
== R_ALPHA_TPREL16
))
4348 if (local_got_entries
)
4349 gotent
= local_got_entries
[r_symndx
];
4353 /* Need to adjust local GOT entries' addends for SEC_MERGE
4354 unless it has been done already. */
4355 if ((sec
->flags
& SEC_MERGE
)
4356 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
4357 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
4359 && !gotent
->reloc_xlated
)
4361 struct alpha_elf_got_entry
*ent
;
4363 for (ent
= gotent
; ent
; ent
= ent
->next
)
4365 ent
->reloc_xlated
= 1;
4366 if (ent
->use_count
== 0)
4370 _bfd_merged_section_offset (output_bfd
, &msec
,
4371 elf_section_data (sec
)->
4373 sym
->st_value
+ ent
->addend
);
4374 ent
->addend
-= sym
->st_value
;
4375 ent
->addend
+= msec
->output_section
->vma
4376 + msec
->output_offset
4377 - sec
->output_section
->vma
4378 - sec
->output_offset
;
4382 dynamic_symbol_p
= FALSE
;
4386 bfd_boolean warned
, ignored
;
4387 struct elf_link_hash_entry
*hh
;
4388 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
4390 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4391 r_symndx
, symtab_hdr
, sym_hashes
,
4393 unresolved_reloc
, warned
, ignored
);
4399 && ! unresolved_reloc
4400 && hh
->root
.type
== bfd_link_hash_undefweak
)
4401 undef_weak_ref
= TRUE
;
4403 h
= (struct alpha_elf_link_hash_entry
*) hh
;
4404 dynamic_symbol_p
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
4405 gotent
= h
->got_entries
;
4408 if (sec
!= NULL
&& discarded_section (sec
))
4409 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4410 rel
, 1, relend
, howto
, 0, contents
);
4412 addend
= rel
->r_addend
;
4415 /* Search for the proper got entry. */
4416 for (; gotent
; gotent
= gotent
->next
)
4417 if (gotent
->gotobj
== gotobj
4418 && gotent
->reloc_type
== r_type
4419 && gotent
->addend
== addend
)
4424 case R_ALPHA_GPDISP
:
4426 bfd_byte
*p_ldah
, *p_lda
;
4428 BFD_ASSERT(gp
!= 0);
4430 value
= (input_section
->output_section
->vma
4431 + input_section
->output_offset
4434 p_ldah
= contents
+ rel
->r_offset
;
4435 p_lda
= p_ldah
+ rel
->r_addend
;
4437 r
= elf64_alpha_do_reloc_gpdisp (input_bfd
, gp
- value
,
4442 case R_ALPHA_LITERAL
:
4443 BFD_ASSERT(sgot
!= NULL
);
4444 BFD_ASSERT(gp
!= 0);
4445 BFD_ASSERT(gotent
!= NULL
);
4446 BFD_ASSERT(gotent
->use_count
>= 1);
4448 if (!gotent
->reloc_done
)
4450 gotent
->reloc_done
= 1;
4452 bfd_put_64 (output_bfd
, value
,
4453 sgot
->contents
+ gotent
->got_offset
);
4455 /* If the symbol has been forced local, output a
4456 RELATIVE reloc, otherwise it will be handled in
4457 finish_dynamic_symbol. */
4458 if (bfd_link_pic (info
)
4459 && !dynamic_symbol_p
4461 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4462 gotent
->got_offset
, 0,
4463 R_ALPHA_RELATIVE
, value
);
4466 value
= (sgot
->output_section
->vma
4467 + sgot
->output_offset
4468 + gotent
->got_offset
);
4472 case R_ALPHA_GPREL32
:
4473 case R_ALPHA_GPREL16
:
4474 case R_ALPHA_GPRELLOW
:
4475 if (dynamic_symbol_p
)
4478 /* xgettext:c-format */
4479 (_("%B: gp-relative relocation against dynamic symbol %s"),
4480 input_bfd
, h
->root
.root
.root
.string
);
4483 BFD_ASSERT(gp
!= 0);
4487 case R_ALPHA_GPRELHIGH
:
4488 if (dynamic_symbol_p
)
4491 /* xgettext:c-format */
4492 (_("%B: gp-relative relocation against dynamic symbol %s"),
4493 input_bfd
, h
->root
.root
.root
.string
);
4496 BFD_ASSERT(gp
!= 0);
4498 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4502 /* A call to a dynamic symbol is definitely out of range of
4503 the 16-bit displacement. Don't bother writing anything. */
4504 if (dynamic_symbol_p
)
4509 /* The regular PC-relative stuff measures from the start of
4510 the instruction rather than the end. */
4514 case R_ALPHA_BRADDR
:
4515 if (dynamic_symbol_p
)
4518 /* xgettext:c-format */
4519 (_("%B: pc-relative relocation against dynamic symbol %s"),
4520 input_bfd
, h
->root
.root
.root
.string
);
4523 /* The regular PC-relative stuff measures from the start of
4524 the instruction rather than the end. */
4533 /* The regular PC-relative stuff measures from the start of
4534 the instruction rather than the end. */
4537 /* The source and destination gp must be the same. Note that
4538 the source will always have an assigned gp, since we forced
4539 one in check_relocs, but that the destination may not, as
4540 it might not have had any relocations at all. Also take
4541 care not to crash if H is an undefined symbol. */
4542 if (h
!= NULL
&& sec
!= NULL
4543 && alpha_elf_tdata (sec
->owner
)->gotobj
4544 && gotobj
!= alpha_elf_tdata (sec
->owner
)->gotobj
)
4547 /* xgettext:c-format */
4548 (_("%B: change in gp: BRSGP %s"),
4549 input_bfd
, h
->root
.root
.root
.string
);
4553 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4555 other
= h
->root
.other
;
4557 other
= sym
->st_other
;
4558 switch (other
& STO_ALPHA_STD_GPLOAD
)
4560 case STO_ALPHA_NOPV
:
4562 case STO_ALPHA_STD_GPLOAD
:
4567 name
= h
->root
.root
.root
.string
;
4570 name
= (bfd_elf_string_from_elf_section
4571 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4573 name
= _("<unknown>");
4574 else if (name
[0] == 0)
4575 name
= bfd_section_name (input_bfd
, sec
);
4578 /* xgettext:c-format */
4579 (_("%B: !samegp reloc against symbol without .prologue: %s"),
4588 case R_ALPHA_REFLONG
:
4589 case R_ALPHA_REFQUAD
:
4590 case R_ALPHA_DTPREL64
:
4591 case R_ALPHA_TPREL64
:
4593 long dynindx
, dyntype
= r_type
;
4596 /* Careful here to remember RELATIVE relocations for global
4597 variables for symbolic shared objects. */
4599 if (dynamic_symbol_p
)
4601 BFD_ASSERT(h
->root
.dynindx
!= -1);
4602 dynindx
= h
->root
.dynindx
;
4604 addend
= 0, value
= 0;
4606 else if (r_type
== R_ALPHA_DTPREL64
)
4608 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4612 else if (r_type
== R_ALPHA_TPREL64
)
4614 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4615 if (!bfd_link_dll (info
))
4621 dynaddend
= value
- dtp_base
;
4623 else if (bfd_link_pic (info
)
4624 && r_symndx
!= STN_UNDEF
4625 && (input_section
->flags
& SEC_ALLOC
)
4627 && !(unresolved_reloc
4628 && (_bfd_elf_section_offset (output_bfd
, info
,
4633 if (r_type
== R_ALPHA_REFLONG
)
4636 /* xgettext:c-format */
4637 (_("%B: unhandled dynamic relocation against %s"),
4639 h
->root
.root
.root
.string
);
4643 dyntype
= R_ALPHA_RELATIVE
;
4649 if (input_section
->flags
& SEC_ALLOC
)
4650 elf64_alpha_emit_dynrel (output_bfd
, info
, input_section
,
4651 srel
, rel
->r_offset
, dynindx
,
4652 dyntype
, dynaddend
);
4656 case R_ALPHA_SREL16
:
4657 case R_ALPHA_SREL32
:
4658 case R_ALPHA_SREL64
:
4659 if (dynamic_symbol_p
)
4662 /* xgettext:c-format */
4663 (_("%B: pc-relative relocation against dynamic symbol %s"),
4664 input_bfd
, h
->root
.root
.root
.string
);
4667 else if (bfd_link_pic (info
)
4671 /* xgettext:c-format */
4672 (_("%B: pc-relative relocation against undefined weak symbol %s"),
4673 input_bfd
, h
->root
.root
.root
.string
);
4678 /* ??? .eh_frame references to discarded sections will be smashed
4679 to relocations against SHN_UNDEF. The .eh_frame format allows
4680 NULL to be encoded as 0 in any format, so this works here. */
4681 if (r_symndx
== STN_UNDEF
4682 || (unresolved_reloc
4683 && _bfd_elf_section_offset (output_bfd
, info
,
4685 rel
->r_offset
) == (bfd_vma
) -1))
4686 howto
= (elf64_alpha_howto_table
4687 + (r_type
- R_ALPHA_SREL32
+ R_ALPHA_REFLONG
));
4690 case R_ALPHA_TLSLDM
:
4691 /* Ignore the symbol for the relocation. The result is always
4692 the current module. */
4693 dynamic_symbol_p
= 0;
4697 if (!gotent
->reloc_done
)
4699 gotent
->reloc_done
= 1;
4701 /* Note that the module index for the main program is 1. */
4702 bfd_put_64 (output_bfd
,
4703 !bfd_link_pic (info
) && !dynamic_symbol_p
,
4704 sgot
->contents
+ gotent
->got_offset
);
4706 /* If the symbol has been forced local, output a
4707 DTPMOD64 reloc, otherwise it will be handled in
4708 finish_dynamic_symbol. */
4709 if (bfd_link_pic (info
) && !dynamic_symbol_p
)
4710 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4711 gotent
->got_offset
, 0,
4712 R_ALPHA_DTPMOD64
, 0);
4714 if (dynamic_symbol_p
|| r_type
== R_ALPHA_TLSLDM
)
4718 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4721 bfd_put_64 (output_bfd
, value
,
4722 sgot
->contents
+ gotent
->got_offset
+ 8);
4725 value
= (sgot
->output_section
->vma
4726 + sgot
->output_offset
4727 + gotent
->got_offset
);
4731 case R_ALPHA_DTPRELHI
:
4732 case R_ALPHA_DTPRELLO
:
4733 case R_ALPHA_DTPREL16
:
4734 if (dynamic_symbol_p
)
4737 /* xgettext:c-format */
4738 (_("%B: dtp-relative relocation against dynamic symbol %s"),
4739 input_bfd
, h
->root
.root
.root
.string
);
4742 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4744 if (r_type
== R_ALPHA_DTPRELHI
)
4745 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4748 case R_ALPHA_TPRELHI
:
4749 case R_ALPHA_TPRELLO
:
4750 case R_ALPHA_TPREL16
:
4751 if (bfd_link_dll (info
))
4754 /* xgettext:c-format */
4755 (_("%B: TLS local exec code cannot be linked into shared objects"),
4759 else if (dynamic_symbol_p
)
4762 /* xgettext:c-format */
4763 (_("%B: tp-relative relocation against dynamic symbol %s"),
4764 input_bfd
, h
->root
.root
.root
.string
);
4767 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4769 if (r_type
== R_ALPHA_TPRELHI
)
4770 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4773 case R_ALPHA_GOTDTPREL
:
4774 case R_ALPHA_GOTTPREL
:
4775 BFD_ASSERT(sgot
!= NULL
);
4776 BFD_ASSERT(gp
!= 0);
4777 BFD_ASSERT(gotent
!= NULL
);
4778 BFD_ASSERT(gotent
->use_count
>= 1);
4780 if (!gotent
->reloc_done
)
4782 gotent
->reloc_done
= 1;
4784 if (dynamic_symbol_p
)
4788 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4789 if (r_type
== R_ALPHA_GOTDTPREL
)
4791 else if (!bfd_link_pic (info
))
4795 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4796 gotent
->got_offset
, 0,
4802 bfd_put_64 (output_bfd
, value
,
4803 sgot
->contents
+ gotent
->got_offset
);
4806 value
= (sgot
->output_section
->vma
4807 + sgot
->output_offset
4808 + gotent
->got_offset
);
4814 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4815 contents
, rel
->r_offset
, value
, 0);
4824 case bfd_reloc_overflow
:
4828 /* Don't warn if the overflow is due to pc relative reloc
4829 against discarded section. Section optimization code should
4832 if (r_symndx
< symtab_hdr
->sh_info
4833 && sec
!= NULL
&& howto
->pc_relative
4834 && discarded_section (sec
))
4841 name
= (bfd_elf_string_from_elf_section
4842 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4846 name
= bfd_section_name (input_bfd
, sec
);
4848 (*info
->callbacks
->reloc_overflow
)
4849 (info
, (h
? &h
->root
.root
: NULL
), name
, howto
->name
,
4850 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4855 case bfd_reloc_outofrange
:
4863 /* Finish up dynamic symbol handling. We set the contents of various
4864 dynamic sections here. */
4867 elf64_alpha_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
4868 struct elf_link_hash_entry
*h
,
4869 Elf_Internal_Sym
*sym
)
4871 struct alpha_elf_link_hash_entry
*ah
= (struct alpha_elf_link_hash_entry
*)h
;
4875 /* Fill in the .plt entry for this symbol. */
4876 asection
*splt
, *sgot
, *srel
;
4877 Elf_Internal_Rela outrel
;
4879 bfd_vma got_addr
, plt_addr
;
4881 struct alpha_elf_got_entry
*gotent
;
4883 BFD_ASSERT (h
->dynindx
!= -1);
4885 splt
= elf_hash_table (info
)->splt
;
4886 BFD_ASSERT (splt
!= NULL
);
4887 srel
= elf_hash_table (info
)->srelplt
;
4888 BFD_ASSERT (srel
!= NULL
);
4890 for (gotent
= ah
->got_entries
; gotent
; gotent
= gotent
->next
)
4891 if (gotent
->reloc_type
== R_ALPHA_LITERAL
4892 && gotent
->use_count
> 0)
4897 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4898 BFD_ASSERT (sgot
!= NULL
);
4900 BFD_ASSERT (gotent
->got_offset
!= -1);
4901 BFD_ASSERT (gotent
->plt_offset
!= -1);
4903 got_addr
= (sgot
->output_section
->vma
4904 + sgot
->output_offset
4905 + gotent
->got_offset
);
4906 plt_addr
= (splt
->output_section
->vma
4907 + splt
->output_offset
4908 + gotent
->plt_offset
);
4910 plt_index
= (gotent
->plt_offset
-PLT_HEADER_SIZE
) / PLT_ENTRY_SIZE
;
4912 /* Fill in the entry in the procedure linkage table. */
4913 if (elf64_alpha_use_secureplt
)
4915 disp
= (PLT_HEADER_SIZE
- 4) - (gotent
->plt_offset
+ 4);
4916 insn
= INSN_AD (INSN_BR
, 31, disp
);
4917 bfd_put_32 (output_bfd
, insn
,
4918 splt
->contents
+ gotent
->plt_offset
);
4920 plt_index
= ((gotent
->plt_offset
- NEW_PLT_HEADER_SIZE
)
4921 / NEW_PLT_ENTRY_SIZE
);
4925 disp
= -(gotent
->plt_offset
+ 4);
4926 insn
= INSN_AD (INSN_BR
, 28, disp
);
4927 bfd_put_32 (output_bfd
, insn
,
4928 splt
->contents
+ gotent
->plt_offset
);
4929 bfd_put_32 (output_bfd
, INSN_UNOP
,
4930 splt
->contents
+ gotent
->plt_offset
+ 4);
4931 bfd_put_32 (output_bfd
, INSN_UNOP
,
4932 splt
->contents
+ gotent
->plt_offset
+ 8);
4934 plt_index
= ((gotent
->plt_offset
- OLD_PLT_HEADER_SIZE
)
4935 / OLD_PLT_ENTRY_SIZE
);
4938 /* Fill in the entry in the .rela.plt section. */
4939 outrel
.r_offset
= got_addr
;
4940 outrel
.r_info
= ELF64_R_INFO(h
->dynindx
, R_ALPHA_JMP_SLOT
);
4941 outrel
.r_addend
= 0;
4943 loc
= srel
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
4944 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
4946 /* Fill in the entry in the .got. */
4947 bfd_put_64 (output_bfd
, plt_addr
,
4948 sgot
->contents
+ gotent
->got_offset
);
4951 else if (alpha_elf_dynamic_symbol_p (h
, info
))
4953 /* Fill in the dynamic relocations for this symbol's .got entries. */
4955 struct alpha_elf_got_entry
*gotent
;
4957 srel
= elf_hash_table (info
)->srelgot
;
4958 BFD_ASSERT (srel
!= NULL
);
4960 for (gotent
= ((struct alpha_elf_link_hash_entry
*) h
)->got_entries
;
4962 gotent
= gotent
->next
)
4967 if (gotent
->use_count
== 0)
4970 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4972 r_type
= gotent
->reloc_type
;
4975 case R_ALPHA_LITERAL
:
4976 r_type
= R_ALPHA_GLOB_DAT
;
4979 r_type
= R_ALPHA_DTPMOD64
;
4981 case R_ALPHA_GOTDTPREL
:
4982 r_type
= R_ALPHA_DTPREL64
;
4984 case R_ALPHA_GOTTPREL
:
4985 r_type
= R_ALPHA_TPREL64
;
4987 case R_ALPHA_TLSLDM
:
4992 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4993 gotent
->got_offset
, h
->dynindx
,
4994 r_type
, gotent
->addend
);
4996 if (gotent
->reloc_type
== R_ALPHA_TLSGD
)
4997 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4998 gotent
->got_offset
+ 8, h
->dynindx
,
4999 R_ALPHA_DTPREL64
, gotent
->addend
);
5003 /* Mark some specially defined symbols as absolute. */
5004 if (h
== elf_hash_table (info
)->hdynamic
5005 || h
== elf_hash_table (info
)->hgot
5006 || h
== elf_hash_table (info
)->hplt
)
5007 sym
->st_shndx
= SHN_ABS
;
5012 /* Finish up the dynamic sections. */
5015 elf64_alpha_finish_dynamic_sections (bfd
*output_bfd
,
5016 struct bfd_link_info
*info
)
5021 dynobj
= elf_hash_table (info
)->dynobj
;
5022 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5024 if (elf_hash_table (info
)->dynamic_sections_created
)
5026 asection
*splt
, *sgotplt
, *srelaplt
;
5027 Elf64_External_Dyn
*dyncon
, *dynconend
;
5028 bfd_vma plt_vma
, gotplt_vma
;
5030 splt
= elf_hash_table (info
)->splt
;
5031 srelaplt
= elf_hash_table (info
)->srelplt
;
5032 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
5034 plt_vma
= splt
->output_section
->vma
+ splt
->output_offset
;
5037 if (elf64_alpha_use_secureplt
)
5039 sgotplt
= elf_hash_table (info
)->sgotplt
;
5040 BFD_ASSERT (sgotplt
!= NULL
);
5041 if (sgotplt
->size
> 0)
5042 gotplt_vma
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
5045 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
5046 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5047 for (; dyncon
< dynconend
; dyncon
++)
5049 Elf_Internal_Dyn dyn
;
5051 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5057 = elf64_alpha_use_secureplt
? gotplt_vma
: plt_vma
;
5060 dyn
.d_un
.d_val
= srelaplt
? srelaplt
->size
: 0;
5063 dyn
.d_un
.d_ptr
= srelaplt
? (srelaplt
->output_section
->vma
5064 + srelaplt
->output_offset
) : 0;
5068 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5071 /* Initialize the plt header. */
5077 if (elf64_alpha_use_secureplt
)
5079 ofs
= gotplt_vma
- (plt_vma
+ PLT_HEADER_SIZE
);
5081 insn
= INSN_ABC (INSN_SUBQ
, 27, 28, 25);
5082 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5084 insn
= INSN_ABO (INSN_LDAH
, 28, 28, (ofs
+ 0x8000) >> 16);
5085 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5087 insn
= INSN_ABC (INSN_S4SUBQ
, 25, 25, 25);
5088 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5090 insn
= INSN_ABO (INSN_LDA
, 28, 28, ofs
);
5091 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5093 insn
= INSN_ABO (INSN_LDQ
, 27, 28, 0);
5094 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 16);
5096 insn
= INSN_ABC (INSN_ADDQ
, 25, 25, 25);
5097 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 20);
5099 insn
= INSN_ABO (INSN_LDQ
, 28, 28, 8);
5100 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 24);
5102 insn
= INSN_AB (INSN_JMP
, 31, 27);
5103 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 28);
5105 insn
= INSN_AD (INSN_BR
, 28, -PLT_HEADER_SIZE
);
5106 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 32);
5110 insn
= INSN_AD (INSN_BR
, 27, 0); /* br $27, .+4 */
5111 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5113 insn
= INSN_ABO (INSN_LDQ
, 27, 27, 12);
5114 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5117 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5119 insn
= INSN_AB (INSN_JMP
, 27, 27);
5120 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5122 /* The next two words will be filled in by ld.so. */
5123 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 16);
5124 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 24);
5127 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 0;
5134 /* We need to use a special link routine to handle the .mdebug section.
5135 We need to merge all instances of these sections together, not write
5136 them all out sequentially. */
5139 elf64_alpha_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5142 struct bfd_link_order
*p
;
5143 asection
*mdebug_sec
;
5144 struct ecoff_debug_info debug
;
5145 const struct ecoff_debug_swap
*swap
5146 = get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
5147 HDRR
*symhdr
= &debug
.symbolic_header
;
5148 void * mdebug_handle
= NULL
;
5149 struct alpha_elf_link_hash_table
* htab
;
5151 htab
= alpha_elf_hash_table (info
);
5155 /* Go through the sections and collect the mdebug information. */
5157 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
5159 if (strcmp (o
->name
, ".mdebug") == 0)
5161 struct extsym_info einfo
;
5163 /* We have found the .mdebug section in the output file.
5164 Look through all the link_orders comprising it and merge
5165 the information together. */
5166 symhdr
->magic
= swap
->sym_magic
;
5167 /* FIXME: What should the version stamp be? */
5169 symhdr
->ilineMax
= 0;
5173 symhdr
->isymMax
= 0;
5174 symhdr
->ioptMax
= 0;
5175 symhdr
->iauxMax
= 0;
5177 symhdr
->issExtMax
= 0;
5180 symhdr
->iextMax
= 0;
5182 /* We accumulate the debugging information itself in the
5183 debug_info structure. */
5185 debug
.external_dnr
= NULL
;
5186 debug
.external_pdr
= NULL
;
5187 debug
.external_sym
= NULL
;
5188 debug
.external_opt
= NULL
;
5189 debug
.external_aux
= NULL
;
5191 debug
.ssext
= debug
.ssext_end
= NULL
;
5192 debug
.external_fdr
= NULL
;
5193 debug
.external_rfd
= NULL
;
5194 debug
.external_ext
= debug
.external_ext_end
= NULL
;
5196 mdebug_handle
= bfd_ecoff_debug_init (abfd
, &debug
, swap
, info
);
5197 if (mdebug_handle
== NULL
)
5206 static const char * const name
[] =
5208 ".text", ".init", ".fini", ".data",
5209 ".rodata", ".sdata", ".sbss", ".bss"
5211 static const int sc
[] = { scText
, scInit
, scFini
, scData
,
5212 scRData
, scSData
, scSBss
, scBss
};
5215 esym
.cobol_main
= 0;
5219 esym
.asym
.iss
= issNil
;
5220 esym
.asym
.st
= stLocal
;
5221 esym
.asym
.reserved
= 0;
5222 esym
.asym
.index
= indexNil
;
5223 for (i
= 0; i
< 8; i
++)
5225 esym
.asym
.sc
= sc
[i
];
5226 s
= bfd_get_section_by_name (abfd
, name
[i
]);
5229 esym
.asym
.value
= s
->vma
;
5230 last
= s
->vma
+ s
->size
;
5233 esym
.asym
.value
= last
;
5235 if (! bfd_ecoff_debug_one_external (abfd
, &debug
, swap
,
5241 for (p
= o
->map_head
.link_order
;
5242 p
!= (struct bfd_link_order
*) NULL
;
5245 asection
*input_section
;
5247 const struct ecoff_debug_swap
*input_swap
;
5248 struct ecoff_debug_info input_debug
;
5252 if (p
->type
!= bfd_indirect_link_order
)
5254 if (p
->type
== bfd_data_link_order
)
5259 input_section
= p
->u
.indirect
.section
;
5260 input_bfd
= input_section
->owner
;
5262 if (! is_alpha_elf (input_bfd
))
5263 /* I don't know what a non ALPHA ELF bfd would be
5264 doing with a .mdebug section, but I don't really
5265 want to deal with it. */
5268 input_swap
= (get_elf_backend_data (input_bfd
)
5269 ->elf_backend_ecoff_debug_swap
);
5271 BFD_ASSERT (p
->size
== input_section
->size
);
5273 /* The ECOFF linking code expects that we have already
5274 read in the debugging information and set up an
5275 ecoff_debug_info structure, so we do that now. */
5276 if (!elf64_alpha_read_ecoff_info (input_bfd
, input_section
,
5280 if (! (bfd_ecoff_debug_accumulate
5281 (mdebug_handle
, abfd
, &debug
, swap
, input_bfd
,
5282 &input_debug
, input_swap
, info
)))
5285 /* Loop through the external symbols. For each one with
5286 interesting information, try to find the symbol in
5287 the linker global hash table and save the information
5288 for the output external symbols. */
5289 eraw_src
= (char *) input_debug
.external_ext
;
5290 eraw_end
= (eraw_src
5291 + (input_debug
.symbolic_header
.iextMax
5292 * input_swap
->external_ext_size
));
5294 eraw_src
< eraw_end
;
5295 eraw_src
+= input_swap
->external_ext_size
)
5299 struct alpha_elf_link_hash_entry
*h
;
5301 (*input_swap
->swap_ext_in
) (input_bfd
, eraw_src
, &ext
);
5302 if (ext
.asym
.sc
== scNil
5303 || ext
.asym
.sc
== scUndefined
5304 || ext
.asym
.sc
== scSUndefined
)
5307 name
= input_debug
.ssext
+ ext
.asym
.iss
;
5308 h
= alpha_elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
5309 if (h
== NULL
|| h
->esym
.ifd
!= -2)
5315 < input_debug
.symbolic_header
.ifdMax
);
5316 ext
.ifd
= input_debug
.ifdmap
[ext
.ifd
];
5322 /* Free up the information we just read. */
5323 free (input_debug
.line
);
5324 free (input_debug
.external_dnr
);
5325 free (input_debug
.external_pdr
);
5326 free (input_debug
.external_sym
);
5327 free (input_debug
.external_opt
);
5328 free (input_debug
.external_aux
);
5329 free (input_debug
.ss
);
5330 free (input_debug
.ssext
);
5331 free (input_debug
.external_fdr
);
5332 free (input_debug
.external_rfd
);
5333 free (input_debug
.external_ext
);
5335 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5336 elf_link_input_bfd ignores this section. */
5337 input_section
->flags
&=~ SEC_HAS_CONTENTS
;
5340 /* Build the external symbol information. */
5343 einfo
.debug
= &debug
;
5345 einfo
.failed
= FALSE
;
5346 elf_link_hash_traverse (elf_hash_table (info
),
5347 elf64_alpha_output_extsym
,
5352 /* Set the size of the .mdebug section. */
5353 o
->size
= bfd_ecoff_debug_size (abfd
, &debug
, swap
);
5355 /* Skip this section later on (I don't think this currently
5356 matters, but someday it might). */
5357 o
->map_head
.link_order
= (struct bfd_link_order
*) NULL
;
5363 /* Invoke the regular ELF backend linker to do all the work. */
5364 if (! bfd_elf_final_link (abfd
, info
))
5367 /* Now write out the computed sections. */
5369 /* The .got subsections... */
5371 bfd
*i
, *dynobj
= elf_hash_table(info
)->dynobj
;
5372 for (i
= htab
->got_list
;
5374 i
= alpha_elf_tdata(i
)->got_link_next
)
5378 /* elf_bfd_final_link already did everything in dynobj. */
5382 sgot
= alpha_elf_tdata(i
)->got
;
5383 if (! bfd_set_section_contents (abfd
, sgot
->output_section
,
5385 (file_ptr
) sgot
->output_offset
,
5391 if (mdebug_sec
!= (asection
*) NULL
)
5393 BFD_ASSERT (abfd
->output_has_begun
);
5394 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle
, abfd
, &debug
,
5396 mdebug_sec
->filepos
))
5399 bfd_ecoff_debug_free (mdebug_handle
, abfd
, &debug
, swap
, info
);
5405 static enum elf_reloc_type_class
5406 elf64_alpha_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5407 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5408 const Elf_Internal_Rela
*rela
)
5410 switch ((int) ELF64_R_TYPE (rela
->r_info
))
5412 case R_ALPHA_RELATIVE
:
5413 return reloc_class_relative
;
5414 case R_ALPHA_JMP_SLOT
:
5415 return reloc_class_plt
;
5417 return reloc_class_copy
;
5419 return reloc_class_normal
;
5423 static const struct bfd_elf_special_section elf64_alpha_special_sections
[] =
5425 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5426 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5427 { NULL
, 0, 0, 0, 0 }
5430 /* ECOFF swapping routines. These are used when dealing with the
5431 .mdebug section, which is in the ECOFF debugging format. Copied
5432 from elf32-mips.c. */
5433 static const struct ecoff_debug_swap
5434 elf64_alpha_ecoff_debug_swap
=
5436 /* Symbol table magic number. */
5438 /* Alignment of debugging information. E.g., 4. */
5440 /* Sizes of external symbolic information. */
5441 sizeof (struct hdr_ext
),
5442 sizeof (struct dnr_ext
),
5443 sizeof (struct pdr_ext
),
5444 sizeof (struct sym_ext
),
5445 sizeof (struct opt_ext
),
5446 sizeof (struct fdr_ext
),
5447 sizeof (struct rfd_ext
),
5448 sizeof (struct ext_ext
),
5449 /* Functions to swap in external symbolic data. */
5458 _bfd_ecoff_swap_tir_in
,
5459 _bfd_ecoff_swap_rndx_in
,
5460 /* Functions to swap out external symbolic data. */
5469 _bfd_ecoff_swap_tir_out
,
5470 _bfd_ecoff_swap_rndx_out
,
5471 /* Function to read in symbolic data. */
5472 elf64_alpha_read_ecoff_info
5475 /* Use a non-standard hash bucket size of 8. */
5477 static const struct elf_size_info alpha_elf_size_info
=
5479 sizeof (Elf64_External_Ehdr
),
5480 sizeof (Elf64_External_Phdr
),
5481 sizeof (Elf64_External_Shdr
),
5482 sizeof (Elf64_External_Rel
),
5483 sizeof (Elf64_External_Rela
),
5484 sizeof (Elf64_External_Sym
),
5485 sizeof (Elf64_External_Dyn
),
5486 sizeof (Elf_External_Note
),
5490 ELFCLASS64
, EV_CURRENT
,
5491 bfd_elf64_write_out_phdrs
,
5492 bfd_elf64_write_shdrs_and_ehdr
,
5493 bfd_elf64_checksum_contents
,
5494 bfd_elf64_write_relocs
,
5495 bfd_elf64_swap_symbol_in
,
5496 bfd_elf64_swap_symbol_out
,
5497 bfd_elf64_slurp_reloc_table
,
5498 bfd_elf64_slurp_symbol_table
,
5499 bfd_elf64_swap_dyn_in
,
5500 bfd_elf64_swap_dyn_out
,
5501 bfd_elf64_swap_reloc_in
,
5502 bfd_elf64_swap_reloc_out
,
5503 bfd_elf64_swap_reloca_in
,
5504 bfd_elf64_swap_reloca_out
5507 #define TARGET_LITTLE_SYM alpha_elf64_vec
5508 #define TARGET_LITTLE_NAME "elf64-alpha"
5509 #define ELF_ARCH bfd_arch_alpha
5510 #define ELF_TARGET_ID ALPHA_ELF_DATA
5511 #define ELF_MACHINE_CODE EM_ALPHA
5512 #define ELF_MAXPAGESIZE 0x10000
5513 #define ELF_COMMONPAGESIZE 0x2000
5515 #define bfd_elf64_bfd_link_hash_table_create \
5516 elf64_alpha_bfd_link_hash_table_create
5518 #define bfd_elf64_bfd_reloc_type_lookup \
5519 elf64_alpha_bfd_reloc_type_lookup
5520 #define bfd_elf64_bfd_reloc_name_lookup \
5521 elf64_alpha_bfd_reloc_name_lookup
5522 #define elf_info_to_howto \
5523 elf64_alpha_info_to_howto
5525 #define bfd_elf64_mkobject \
5526 elf64_alpha_mkobject
5527 #define elf_backend_object_p \
5528 elf64_alpha_object_p
5530 #define elf_backend_section_from_shdr \
5531 elf64_alpha_section_from_shdr
5532 #define elf_backend_section_flags \
5533 elf64_alpha_section_flags
5534 #define elf_backend_fake_sections \
5535 elf64_alpha_fake_sections
5537 #define bfd_elf64_bfd_is_local_label_name \
5538 elf64_alpha_is_local_label_name
5539 #define bfd_elf64_find_nearest_line \
5540 elf64_alpha_find_nearest_line
5541 #define bfd_elf64_bfd_relax_section \
5542 elf64_alpha_relax_section
5544 #define elf_backend_add_symbol_hook \
5545 elf64_alpha_add_symbol_hook
5546 #define elf_backend_relocs_compatible \
5547 _bfd_elf_relocs_compatible
5548 #define elf_backend_sort_relocs_p \
5549 elf64_alpha_sort_relocs_p
5550 #define elf_backend_check_relocs \
5551 elf64_alpha_check_relocs
5552 #define elf_backend_create_dynamic_sections \
5553 elf64_alpha_create_dynamic_sections
5554 #define elf_backend_adjust_dynamic_symbol \
5555 elf64_alpha_adjust_dynamic_symbol
5556 #define elf_backend_merge_symbol_attribute \
5557 elf64_alpha_merge_symbol_attribute
5558 #define elf_backend_copy_indirect_symbol \
5559 elf64_alpha_copy_indirect_symbol
5560 #define elf_backend_always_size_sections \
5561 elf64_alpha_always_size_sections
5562 #define elf_backend_size_dynamic_sections \
5563 elf64_alpha_size_dynamic_sections
5564 #define elf_backend_omit_section_dynsym \
5565 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5566 #define elf_backend_relocate_section \
5567 elf64_alpha_relocate_section
5568 #define elf_backend_finish_dynamic_symbol \
5569 elf64_alpha_finish_dynamic_symbol
5570 #define elf_backend_finish_dynamic_sections \
5571 elf64_alpha_finish_dynamic_sections
5572 #define bfd_elf64_bfd_final_link \
5573 elf64_alpha_final_link
5574 #define elf_backend_reloc_type_class \
5575 elf64_alpha_reloc_type_class
5577 #define elf_backend_can_gc_sections 1
5578 #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
5579 #define elf_backend_gc_sweep_hook elf64_alpha_gc_sweep_hook
5581 #define elf_backend_ecoff_debug_swap \
5582 &elf64_alpha_ecoff_debug_swap
5584 #define elf_backend_size_info \
5587 #define elf_backend_special_sections \
5588 elf64_alpha_special_sections
5590 /* A few constants that determine how the .plt section is set up. */
5591 #define elf_backend_want_got_plt 0
5592 #define elf_backend_plt_readonly 0
5593 #define elf_backend_want_plt_sym 1
5594 #define elf_backend_got_header_size 0
5595 #define elf_backend_dtrel_excludes_plt 1
5597 #include "elf64-target.h"
5599 /* FreeBSD support. */
5601 #undef TARGET_LITTLE_SYM
5602 #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
5603 #undef TARGET_LITTLE_NAME
5604 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5606 #define ELF_OSABI ELFOSABI_FREEBSD
5608 /* The kernel recognizes executables as valid only if they carry a
5609 "FreeBSD" label in the ELF header. So we put this label on all
5610 executables and (for simplicity) also all other object files. */
5613 elf64_alpha_fbsd_post_process_headers (bfd
* abfd
,
5614 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
5616 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
5618 i_ehdrp
= elf_elfheader (abfd
);
5620 /* Put an ABI label supported by FreeBSD >= 4.1. */
5621 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
5622 #ifdef OLD_FREEBSD_ABI_LABEL
5623 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5624 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5628 #undef elf_backend_post_process_headers
5629 #define elf_backend_post_process_headers \
5630 elf64_alpha_fbsd_post_process_headers
5633 #define elf64_bed elf64_alpha_fbsd_bed
5635 #include "elf64-target.h"