1 /* Alpha specific support for 64-bit ELF
2 Copyright (C) 1996-2018 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 (_("%pB: 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
.ref_regular
= 1;
1844 /* We can only get preliminary data on whether a symbol is
1845 locally or externally defined, as not all of the input files
1846 have yet been processed. Do something with what we know, as
1847 this may help reduce memory usage and processing time later. */
1848 maybe_dynamic
= FALSE
;
1849 if (h
&& ((bfd_link_pic (info
)
1851 || info
->unresolved_syms_in_shared_libs
== RM_IGNORE
))
1852 || !h
->root
.def_regular
1853 || h
->root
.root
.type
== bfd_link_hash_defweak
))
1854 maybe_dynamic
= TRUE
;
1858 r_type
= ELF64_R_TYPE (rel
->r_info
);
1859 addend
= rel
->r_addend
;
1863 case R_ALPHA_LITERAL
:
1864 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1866 /* Remember how this literal is used from its LITUSEs.
1867 This will be important when it comes to decide if we can
1868 create a .plt entry for a function symbol. */
1869 while (++rel
< relend
&& ELF64_R_TYPE (rel
->r_info
) == R_ALPHA_LITUSE
)
1870 if (rel
->r_addend
>= 1 && rel
->r_addend
<= 6)
1871 gotent_flags
|= 1 << rel
->r_addend
;
1874 /* No LITUSEs -- presumably the address is used somehow. */
1875 if (gotent_flags
== 0)
1876 gotent_flags
= ALPHA_ELF_LINK_HASH_LU_ADDR
;
1879 case R_ALPHA_GPDISP
:
1880 case R_ALPHA_GPREL16
:
1881 case R_ALPHA_GPREL32
:
1882 case R_ALPHA_GPRELHIGH
:
1883 case R_ALPHA_GPRELLOW
:
1888 case R_ALPHA_REFLONG
:
1889 case R_ALPHA_REFQUAD
:
1890 if (bfd_link_pic (info
) || maybe_dynamic
)
1894 case R_ALPHA_TLSLDM
:
1895 /* The symbol for a TLSLDM reloc is ignored. Collapse the
1896 reloc to the STN_UNDEF (0) symbol so that they all match. */
1897 r_symndx
= STN_UNDEF
;
1899 maybe_dynamic
= FALSE
;
1903 case R_ALPHA_GOTDTPREL
:
1904 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1907 case R_ALPHA_GOTTPREL
:
1908 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1909 gotent_flags
= ALPHA_ELF_LINK_HASH_TLS_IE
;
1910 if (bfd_link_pic (info
))
1911 info
->flags
|= DF_STATIC_TLS
;
1914 case R_ALPHA_TPREL64
:
1915 if (bfd_link_dll (info
))
1917 info
->flags
|= DF_STATIC_TLS
;
1920 else if (maybe_dynamic
)
1925 if (need
& NEED_GOT
)
1927 if (alpha_elf_tdata(abfd
)->gotobj
== NULL
)
1929 if (!elf64_alpha_create_got_section (abfd
, info
))
1934 if (need
& NEED_GOT_ENTRY
)
1936 struct alpha_elf_got_entry
*gotent
;
1938 gotent
= get_got_entry (abfd
, h
, r_type
, r_symndx
, addend
);
1944 gotent
->flags
|= gotent_flags
;
1947 gotent_flags
|= h
->flags
;
1948 h
->flags
= gotent_flags
;
1950 /* Make a guess as to whether a .plt entry is needed. */
1951 /* ??? It appears that we won't make it into
1952 adjust_dynamic_symbol for symbols that remain
1953 totally undefined. Copying this check here means
1954 we can create a plt entry for them too. */
1956 = (maybe_dynamic
&& elf64_alpha_want_plt (h
));
1961 if (need
& NEED_DYNREL
)
1963 /* We need to create the section here now whether we eventually
1964 use it or not so that it gets mapped to an output section by
1965 the linker. If not used, we'll kill it in size_dynamic_sections. */
1968 sreloc
= _bfd_elf_make_dynamic_reloc_section
1969 (sec
, dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1977 /* Since we havn't seen all of the input symbols yet, we
1978 don't know whether we'll actually need a dynamic relocation
1979 entry for this reloc. So make a record of it. Once we
1980 find out if this thing needs dynamic relocation we'll
1981 expand the relocation sections by the appropriate amount. */
1983 struct alpha_elf_reloc_entry
*rent
;
1985 for (rent
= h
->reloc_entries
; rent
; rent
= rent
->next
)
1986 if (rent
->rtype
== r_type
&& rent
->srel
== sreloc
)
1991 amt
= sizeof (struct alpha_elf_reloc_entry
);
1992 rent
= (struct alpha_elf_reloc_entry
*) bfd_alloc (abfd
, amt
);
1996 rent
->srel
= sreloc
;
1997 rent
->rtype
= r_type
;
1999 rent
->reltext
= (sec
->flags
& SEC_READONLY
) != 0;
2001 rent
->next
= h
->reloc_entries
;
2002 h
->reloc_entries
= rent
;
2007 else if (bfd_link_pic (info
))
2009 /* If this is a shared library, and the section is to be
2010 loaded into memory, we need a RELATIVE reloc. */
2011 sreloc
->size
+= sizeof (Elf64_External_Rela
);
2012 if (sec
->flags
& SEC_READONLY
)
2013 info
->flags
|= DF_TEXTREL
;
2021 /* Return the section that should be marked against GC for a given
2025 elf64_alpha_gc_mark_hook (asection
*sec
, struct bfd_link_info
*info
,
2026 Elf_Internal_Rela
*rel
,
2027 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
)
2029 /* These relocations don't really reference a symbol. Instead we store
2030 extra data in their addend slot. Ignore the symbol. */
2031 switch (ELF64_R_TYPE (rel
->r_info
))
2033 case R_ALPHA_LITUSE
:
2034 case R_ALPHA_GPDISP
:
2039 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2042 /* Adjust a symbol defined by a dynamic object and referenced by a
2043 regular object. The current definition is in some section of the
2044 dynamic object, but we're not including those sections. We have to
2045 change the definition to something the rest of the link can
2049 elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2050 struct elf_link_hash_entry
*h
)
2054 struct alpha_elf_link_hash_entry
*ah
;
2056 dynobj
= elf_hash_table(info
)->dynobj
;
2057 ah
= (struct alpha_elf_link_hash_entry
*)h
;
2059 /* Now that we've seen all of the input symbols, finalize our decision
2060 about whether this symbol should get a .plt entry. Irritatingly, it
2061 is common for folk to leave undefined symbols in shared libraries,
2062 and they still expect lazy binding; accept undefined symbols in lieu
2064 if (alpha_elf_dynamic_symbol_p (h
, info
) && elf64_alpha_want_plt (ah
))
2066 h
->needs_plt
= TRUE
;
2068 s
= elf_hash_table(info
)->splt
;
2069 if (!s
&& !elf64_alpha_create_dynamic_sections (dynobj
, info
))
2072 /* We need one plt entry per got subsection. Delay allocation of
2073 the actual plt entries until size_plt_section, called from
2074 size_dynamic_sections or during relaxation. */
2079 h
->needs_plt
= FALSE
;
2081 /* If this is a weak symbol, and there is a real definition, the
2082 processor independent code will have arranged for us to see the
2083 real definition first, and we can just use the same value. */
2084 if (h
->is_weakalias
)
2086 struct elf_link_hash_entry
*def
= weakdef (h
);
2087 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
2088 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
2089 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
2093 /* This is a reference to a symbol defined by a dynamic object which
2094 is not a function. The Alpha, since it uses .got entries for all
2095 symbols even in regular objects, does not need the hackery of a
2096 .dynbss section and COPY dynamic relocations. */
2101 /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
2104 elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry
*h
,
2105 const Elf_Internal_Sym
*isym
,
2106 bfd_boolean definition
,
2107 bfd_boolean dynamic
)
2109 if (!dynamic
&& definition
)
2110 h
->other
= ((h
->other
& ELF_ST_VISIBILITY (-1))
2111 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
2114 /* Symbol versioning can create new symbols, and make our old symbols
2115 indirect to the new ones. Consolidate the got and reloc information
2116 in these situations. */
2119 elf64_alpha_copy_indirect_symbol (struct bfd_link_info
*info
,
2120 struct elf_link_hash_entry
*dir
,
2121 struct elf_link_hash_entry
*ind
)
2123 struct alpha_elf_link_hash_entry
*hi
2124 = (struct alpha_elf_link_hash_entry
*) ind
;
2125 struct alpha_elf_link_hash_entry
*hs
2126 = (struct alpha_elf_link_hash_entry
*) dir
;
2128 /* Do the merging in the superclass. */
2129 _bfd_elf_link_hash_copy_indirect(info
, dir
, ind
);
2131 /* Merge the flags. Whee. */
2132 hs
->flags
|= hi
->flags
;
2134 /* ??? It's unclear to me what's really supposed to happen when
2135 "merging" defweak and defined symbols, given that we don't
2136 actually throw away the defweak. This more-or-less copies
2137 the logic related to got and plt entries in the superclass. */
2138 if (ind
->root
.type
!= bfd_link_hash_indirect
)
2141 /* Merge the .got entries. Cannibalize the old symbol's list in
2142 doing so, since we don't need it anymore. */
2144 if (hs
->got_entries
== NULL
)
2145 hs
->got_entries
= hi
->got_entries
;
2148 struct alpha_elf_got_entry
*gi
, *gs
, *gin
, *gsh
;
2150 gsh
= hs
->got_entries
;
2151 for (gi
= hi
->got_entries
; gi
; gi
= gin
)
2154 for (gs
= gsh
; gs
; gs
= gs
->next
)
2155 if (gi
->gotobj
== gs
->gotobj
2156 && gi
->reloc_type
== gs
->reloc_type
2157 && gi
->addend
== gs
->addend
)
2159 gs
->use_count
+= gi
->use_count
;
2162 gi
->next
= hs
->got_entries
;
2163 hs
->got_entries
= gi
;
2167 hi
->got_entries
= NULL
;
2169 /* And similar for the reloc entries. */
2171 if (hs
->reloc_entries
== NULL
)
2172 hs
->reloc_entries
= hi
->reloc_entries
;
2175 struct alpha_elf_reloc_entry
*ri
, *rs
, *rin
, *rsh
;
2177 rsh
= hs
->reloc_entries
;
2178 for (ri
= hi
->reloc_entries
; ri
; ri
= rin
)
2181 for (rs
= rsh
; rs
; rs
= rs
->next
)
2182 if (ri
->rtype
== rs
->rtype
&& ri
->srel
== rs
->srel
)
2184 rs
->count
+= ri
->count
;
2187 ri
->next
= hs
->reloc_entries
;
2188 hs
->reloc_entries
= ri
;
2192 hi
->reloc_entries
= NULL
;
2195 /* Is it possible to merge two object file's .got tables? */
2198 elf64_alpha_can_merge_gots (bfd
*a
, bfd
*b
)
2200 int total
= alpha_elf_tdata (a
)->total_got_size
;
2203 /* Trivial quick fallout test. */
2204 if (total
+ alpha_elf_tdata (b
)->total_got_size
<= MAX_GOT_SIZE
)
2207 /* By their nature, local .got entries cannot be merged. */
2208 if ((total
+= alpha_elf_tdata (b
)->local_got_size
) > MAX_GOT_SIZE
)
2211 /* Failing the common trivial comparison, we must effectively
2212 perform the merge. Not actually performing the merge means that
2213 we don't have to store undo information in case we fail. */
2214 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2216 struct alpha_elf_link_hash_entry
**hashes
= alpha_elf_sym_hashes (bsub
);
2217 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2220 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2221 for (i
= 0; i
< n
; ++i
)
2223 struct alpha_elf_got_entry
*ae
, *be
;
2224 struct alpha_elf_link_hash_entry
*h
;
2227 while (h
->root
.root
.type
== bfd_link_hash_indirect
2228 || h
->root
.root
.type
== bfd_link_hash_warning
)
2229 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2231 for (be
= h
->got_entries
; be
; be
= be
->next
)
2233 if (be
->use_count
== 0)
2235 if (be
->gotobj
!= b
)
2238 for (ae
= h
->got_entries
; ae
; ae
= ae
->next
)
2240 && ae
->reloc_type
== be
->reloc_type
2241 && ae
->addend
== be
->addend
)
2244 total
+= alpha_got_entry_size (be
->reloc_type
);
2245 if (total
> MAX_GOT_SIZE
)
2255 /* Actually merge two .got tables. */
2258 elf64_alpha_merge_gots (bfd
*a
, bfd
*b
)
2260 int total
= alpha_elf_tdata (a
)->total_got_size
;
2263 /* Remember local expansion. */
2265 int e
= alpha_elf_tdata (b
)->local_got_size
;
2267 alpha_elf_tdata (a
)->local_got_size
+= e
;
2270 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2272 struct alpha_elf_got_entry
**local_got_entries
;
2273 struct alpha_elf_link_hash_entry
**hashes
;
2274 Elf_Internal_Shdr
*symtab_hdr
;
2277 /* Let the local .got entries know they are part of a new subsegment. */
2278 local_got_entries
= alpha_elf_tdata (bsub
)->local_got_entries
;
2279 if (local_got_entries
)
2281 n
= elf_tdata (bsub
)->symtab_hdr
.sh_info
;
2282 for (i
= 0; i
< n
; ++i
)
2284 struct alpha_elf_got_entry
*ent
;
2285 for (ent
= local_got_entries
[i
]; ent
; ent
= ent
->next
)
2290 /* Merge the global .got entries. */
2291 hashes
= alpha_elf_sym_hashes (bsub
);
2292 symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2294 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2295 for (i
= 0; i
< n
; ++i
)
2297 struct alpha_elf_got_entry
*ae
, *be
, **pbe
, **start
;
2298 struct alpha_elf_link_hash_entry
*h
;
2301 while (h
->root
.root
.type
== bfd_link_hash_indirect
2302 || h
->root
.root
.type
== bfd_link_hash_warning
)
2303 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2305 pbe
= start
= &h
->got_entries
;
2306 while ((be
= *pbe
) != NULL
)
2308 if (be
->use_count
== 0)
2311 memset (be
, 0xa5, sizeof (*be
));
2314 if (be
->gotobj
!= b
)
2317 for (ae
= *start
; ae
; ae
= ae
->next
)
2319 && ae
->reloc_type
== be
->reloc_type
2320 && ae
->addend
== be
->addend
)
2322 ae
->flags
|= be
->flags
;
2323 ae
->use_count
+= be
->use_count
;
2325 memset (be
, 0xa5, sizeof (*be
));
2329 total
+= alpha_got_entry_size (be
->reloc_type
);
2337 alpha_elf_tdata (bsub
)->gotobj
= a
;
2339 alpha_elf_tdata (a
)->total_got_size
= total
;
2341 /* Merge the two in_got chains. */
2346 while ((next
= alpha_elf_tdata (bsub
)->in_got_link_next
) != NULL
)
2349 alpha_elf_tdata (bsub
)->in_got_link_next
= b
;
2353 /* Calculate the offsets for the got entries. */
2356 elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry
*h
,
2357 void * arg ATTRIBUTE_UNUSED
)
2359 struct alpha_elf_got_entry
*gotent
;
2361 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2362 if (gotent
->use_count
> 0)
2364 struct alpha_elf_obj_tdata
*td
;
2365 bfd_size_type
*plge
;
2367 td
= alpha_elf_tdata (gotent
->gotobj
);
2368 plge
= &td
->got
->size
;
2369 gotent
->got_offset
= *plge
;
2370 *plge
+= alpha_got_entry_size (gotent
->reloc_type
);
2377 elf64_alpha_calc_got_offsets (struct bfd_link_info
*info
)
2380 struct alpha_elf_link_hash_table
* htab
;
2382 htab
= alpha_elf_hash_table (info
);
2385 got_list
= htab
->got_list
;
2387 /* First, zero out the .got sizes, as we may be recalculating the
2388 .got after optimizing it. */
2389 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2390 alpha_elf_tdata(i
)->got
->size
= 0;
2392 /* Next, fill in the offsets for all the global entries. */
2393 alpha_elf_link_hash_traverse (htab
,
2394 elf64_alpha_calc_got_offsets_for_symbol
,
2397 /* Finally, fill in the offsets for the local entries. */
2398 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2400 bfd_size_type got_offset
= alpha_elf_tdata(i
)->got
->size
;
2403 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2405 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2408 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2409 if (!local_got_entries
)
2412 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2413 for (gotent
= local_got_entries
[k
]; gotent
; gotent
= gotent
->next
)
2414 if (gotent
->use_count
> 0)
2416 gotent
->got_offset
= got_offset
;
2417 got_offset
+= alpha_got_entry_size (gotent
->reloc_type
);
2421 alpha_elf_tdata(i
)->got
->size
= got_offset
;
2425 /* Constructs the gots. */
2428 elf64_alpha_size_got_sections (struct bfd_link_info
*info
,
2429 bfd_boolean may_merge
)
2431 bfd
*i
, *got_list
, *cur_got_obj
= NULL
;
2432 struct alpha_elf_link_hash_table
* htab
;
2434 htab
= alpha_elf_hash_table (info
);
2437 got_list
= htab
->got_list
;
2439 /* On the first time through, pretend we have an existing got list
2440 consisting of all of the input files. */
2441 if (got_list
== NULL
)
2443 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
2447 if (! is_alpha_elf (i
))
2450 this_got
= alpha_elf_tdata (i
)->gotobj
;
2451 if (this_got
== NULL
)
2454 /* We are assuming no merging has yet occurred. */
2455 BFD_ASSERT (this_got
== i
);
2457 if (alpha_elf_tdata (this_got
)->total_got_size
> MAX_GOT_SIZE
)
2459 /* Yikes! A single object file has too many entries. */
2461 /* xgettext:c-format */
2462 (_("%pB: .got subsegment exceeds 64K (size %d)"),
2463 i
, alpha_elf_tdata (this_got
)->total_got_size
);
2467 if (got_list
== NULL
)
2468 got_list
= this_got
;
2470 alpha_elf_tdata(cur_got_obj
)->got_link_next
= this_got
;
2471 cur_got_obj
= this_got
;
2474 /* Strange degenerate case of no got references. */
2475 if (got_list
== NULL
)
2478 htab
->got_list
= got_list
;
2481 cur_got_obj
= got_list
;
2482 if (cur_got_obj
== NULL
)
2487 i
= alpha_elf_tdata(cur_got_obj
)->got_link_next
;
2490 if (elf64_alpha_can_merge_gots (cur_got_obj
, i
))
2492 elf64_alpha_merge_gots (cur_got_obj
, i
);
2494 alpha_elf_tdata(i
)->got
->size
= 0;
2495 i
= alpha_elf_tdata(i
)->got_link_next
;
2496 alpha_elf_tdata(cur_got_obj
)->got_link_next
= i
;
2501 i
= alpha_elf_tdata(i
)->got_link_next
;
2506 /* Once the gots have been merged, fill in the got offsets for
2507 everything therein. */
2508 elf64_alpha_calc_got_offsets (info
);
2514 elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry
*h
,
2517 asection
*splt
= (asection
*) data
;
2518 struct alpha_elf_got_entry
*gotent
;
2519 bfd_boolean saw_one
= FALSE
;
2521 /* If we didn't need an entry before, we still don't. */
2522 if (!h
->root
.needs_plt
)
2525 /* For each LITERAL got entry still in use, allocate a plt entry. */
2526 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2527 if (gotent
->reloc_type
== R_ALPHA_LITERAL
2528 && gotent
->use_count
> 0)
2530 if (splt
->size
== 0)
2531 splt
->size
= PLT_HEADER_SIZE
;
2532 gotent
->plt_offset
= splt
->size
;
2533 splt
->size
+= PLT_ENTRY_SIZE
;
2537 /* If there weren't any, there's no longer a need for the PLT entry. */
2539 h
->root
.needs_plt
= FALSE
;
2544 /* Called from relax_section to rebuild the PLT in light of potential changes
2545 in the function's status. */
2548 elf64_alpha_size_plt_section (struct bfd_link_info
*info
)
2550 asection
*splt
, *spltrel
, *sgotplt
;
2551 unsigned long entries
;
2552 struct alpha_elf_link_hash_table
* htab
;
2554 htab
= alpha_elf_hash_table (info
);
2558 splt
= elf_hash_table(info
)->splt
;
2564 alpha_elf_link_hash_traverse (htab
,
2565 elf64_alpha_size_plt_section_1
, splt
);
2567 /* Every plt entry requires a JMP_SLOT relocation. */
2568 spltrel
= elf_hash_table(info
)->srelplt
;
2572 if (elf64_alpha_use_secureplt
)
2573 entries
= (splt
->size
- NEW_PLT_HEADER_SIZE
) / NEW_PLT_ENTRY_SIZE
;
2575 entries
= (splt
->size
- OLD_PLT_HEADER_SIZE
) / OLD_PLT_ENTRY_SIZE
;
2577 spltrel
->size
= entries
* sizeof (Elf64_External_Rela
);
2579 /* When using the secureplt, we need two words somewhere in the data
2580 segment for the dynamic linker to tell us where to go. This is the
2581 entire contents of the .got.plt section. */
2582 if (elf64_alpha_use_secureplt
)
2584 sgotplt
= elf_hash_table(info
)->sgotplt
;
2585 sgotplt
->size
= entries
? 16 : 0;
2590 elf64_alpha_always_size_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2591 struct bfd_link_info
*info
)
2594 struct alpha_elf_link_hash_table
* htab
;
2596 if (bfd_link_relocatable (info
))
2599 htab
= alpha_elf_hash_table (info
);
2603 if (!elf64_alpha_size_got_sections (info
, TRUE
))
2606 /* Allocate space for all of the .got subsections. */
2608 for ( ; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2610 asection
*s
= alpha_elf_tdata(i
)->got
;
2613 s
->contents
= (bfd_byte
*) bfd_zalloc (i
, s
->size
);
2614 if (s
->contents
== NULL
)
2622 /* The number of dynamic relocations required by a static relocation. */
2625 alpha_dynamic_entries_for_reloc (int r_type
, int dynamic
, int shared
, int pie
)
2629 /* May appear in GOT entries. */
2631 return (dynamic
? 2 : shared
? 1 : 0);
2632 case R_ALPHA_TLSLDM
:
2634 case R_ALPHA_LITERAL
:
2635 return dynamic
|| shared
;
2636 case R_ALPHA_GOTTPREL
:
2637 return dynamic
|| (shared
&& !pie
);
2638 case R_ALPHA_GOTDTPREL
:
2641 /* May appear in data sections. */
2642 case R_ALPHA_REFLONG
:
2643 case R_ALPHA_REFQUAD
:
2644 return dynamic
|| shared
;
2645 case R_ALPHA_TPREL64
:
2646 return dynamic
|| (shared
&& !pie
);
2648 /* Everything else is illegal. We'll issue an error during
2649 relocate_section. */
2655 /* Work out the sizes of the dynamic relocation entries. */
2658 elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry
*h
,
2659 struct bfd_link_info
*info
)
2661 bfd_boolean dynamic
;
2662 struct alpha_elf_reloc_entry
*relent
;
2663 unsigned long entries
;
2665 /* If the symbol was defined as a common symbol in a regular object
2666 file, and there was no definition in any dynamic object, then the
2667 linker will have allocated space for the symbol in a common
2668 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
2669 set. This is done for dynamic symbols in
2670 elf_adjust_dynamic_symbol but this is not done for non-dynamic
2671 symbols, somehow. */
2672 if (!h
->root
.def_regular
2673 && h
->root
.ref_regular
2674 && !h
->root
.def_dynamic
2675 && (h
->root
.root
.type
== bfd_link_hash_defined
2676 || h
->root
.root
.type
== bfd_link_hash_defweak
)
2677 && !(h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
))
2678 h
->root
.def_regular
= 1;
2680 /* If the symbol is dynamic, we'll need all the relocations in their
2681 natural form. If this is a shared object, and it has been forced
2682 local, we'll need the same number of RELATIVE relocations. */
2683 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2685 /* If the symbol is a hidden undefined weak, then we never have any
2686 relocations. Avoid the loop which may want to add RELATIVE relocs
2687 based on bfd_link_pic (info). */
2688 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2691 for (relent
= h
->reloc_entries
; relent
; relent
= relent
->next
)
2693 entries
= alpha_dynamic_entries_for_reloc (relent
->rtype
, dynamic
,
2694 bfd_link_pic (info
),
2695 bfd_link_pie (info
));
2698 relent
->srel
->size
+=
2699 entries
* sizeof (Elf64_External_Rela
) * relent
->count
;
2700 if (relent
->reltext
)
2701 info
->flags
|= DT_TEXTREL
;
2708 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
2712 elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry
*h
,
2713 struct bfd_link_info
*info
)
2715 bfd_boolean dynamic
;
2716 struct alpha_elf_got_entry
*gotent
;
2717 unsigned long entries
;
2719 /* If we're using a plt for this symbol, then all of its relocations
2720 for its got entries go into .rela.plt. */
2721 if (h
->root
.needs_plt
)
2724 /* If the symbol is dynamic, we'll need all the relocations in their
2725 natural form. If this is a shared object, and it has been forced
2726 local, we'll need the same number of RELATIVE relocations. */
2727 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2729 /* If the symbol is a hidden undefined weak, then we never have any
2730 relocations. Avoid the loop which may want to add RELATIVE relocs
2731 based on bfd_link_pic (info). */
2732 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2736 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2737 if (gotent
->use_count
> 0)
2738 entries
+= alpha_dynamic_entries_for_reloc (gotent
->reloc_type
, dynamic
,
2739 bfd_link_pic (info
),
2740 bfd_link_pie (info
));
2744 asection
*srel
= elf_hash_table(info
)->srelgot
;
2745 BFD_ASSERT (srel
!= NULL
);
2746 srel
->size
+= sizeof (Elf64_External_Rela
) * entries
;
2752 /* Set the sizes of the dynamic relocation sections. */
2755 elf64_alpha_size_rela_got_section (struct bfd_link_info
*info
)
2757 unsigned long entries
;
2760 struct alpha_elf_link_hash_table
* htab
;
2762 htab
= alpha_elf_hash_table (info
);
2766 /* Shared libraries often require RELATIVE relocs, and some relocs
2767 require attention for the main application as well. */
2770 for (i
= htab
->got_list
;
2771 i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2775 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2777 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2780 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2781 if (!local_got_entries
)
2784 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2785 for (gotent
= local_got_entries
[k
];
2786 gotent
; gotent
= gotent
->next
)
2787 if (gotent
->use_count
> 0)
2788 entries
+= (alpha_dynamic_entries_for_reloc
2789 (gotent
->reloc_type
, 0, bfd_link_pic (info
),
2790 bfd_link_pie (info
)));
2794 srel
= elf_hash_table(info
)->srelgot
;
2797 BFD_ASSERT (entries
== 0);
2800 srel
->size
= sizeof (Elf64_External_Rela
) * entries
;
2802 /* Now do the non-local symbols. */
2803 alpha_elf_link_hash_traverse (htab
,
2804 elf64_alpha_size_rela_got_1
, info
);
2807 /* Set the sizes of the dynamic sections. */
2810 elf64_alpha_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2811 struct bfd_link_info
*info
)
2815 bfd_boolean relplt
, relocs
;
2816 struct alpha_elf_link_hash_table
* htab
;
2818 htab
= alpha_elf_hash_table (info
);
2822 dynobj
= elf_hash_table(info
)->dynobj
;
2823 BFD_ASSERT(dynobj
!= NULL
);
2825 if (elf_hash_table (info
)->dynamic_sections_created
)
2827 /* Set the contents of the .interp section to the interpreter. */
2828 if (bfd_link_executable (info
) && !info
->nointerp
)
2830 s
= bfd_get_linker_section (dynobj
, ".interp");
2831 BFD_ASSERT (s
!= NULL
);
2832 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2833 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2836 /* Now that we've seen all of the input files, we can decide which
2837 symbols need dynamic relocation entries and which don't. We've
2838 collected information in check_relocs that we can now apply to
2839 size the dynamic relocation sections. */
2840 alpha_elf_link_hash_traverse (htab
,
2841 elf64_alpha_calc_dynrel_sizes
, info
);
2843 elf64_alpha_size_rela_got_section (info
);
2844 elf64_alpha_size_plt_section (info
);
2846 /* else we're not dynamic and by definition we don't need such things. */
2848 /* The check_relocs and adjust_dynamic_symbol entry points have
2849 determined the sizes of the various dynamic sections. Allocate
2853 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2857 if (!(s
->flags
& SEC_LINKER_CREATED
))
2860 /* It's OK to base decisions on the section name, because none
2861 of the dynobj section names depend upon the input files. */
2862 name
= bfd_get_section_name (dynobj
, s
);
2864 if (CONST_STRNEQ (name
, ".rela"))
2868 if (strcmp (name
, ".rela.plt") == 0)
2873 /* We use the reloc_count field as a counter if we need
2874 to copy relocs into the output file. */
2878 else if (! CONST_STRNEQ (name
, ".got")
2879 && strcmp (name
, ".plt") != 0
2880 && strcmp (name
, ".dynbss") != 0)
2882 /* It's not one of our dynamic sections, so don't allocate space. */
2888 /* If we don't need this section, strip it from the output file.
2889 This is to handle .rela.bss and .rela.plt. We must create it
2890 in create_dynamic_sections, because it must be created before
2891 the linker maps input sections to output sections. The
2892 linker does that before adjust_dynamic_symbol is called, and
2893 it is that function which decides whether anything needs to
2894 go into these sections. */
2895 if (!CONST_STRNEQ (name
, ".got"))
2896 s
->flags
|= SEC_EXCLUDE
;
2898 else if ((s
->flags
& SEC_HAS_CONTENTS
) != 0)
2900 /* Allocate memory for the section contents. */
2901 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2902 if (s
->contents
== NULL
)
2907 if (elf_hash_table (info
)->dynamic_sections_created
)
2909 /* Add some entries to the .dynamic section. We fill in the
2910 values later, in elf64_alpha_finish_dynamic_sections, but we
2911 must add the entries now so that we get the correct size for
2912 the .dynamic section. The DT_DEBUG entry is filled in by the
2913 dynamic linker and used by the debugger. */
2914 #define add_dynamic_entry(TAG, VAL) \
2915 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2917 if (bfd_link_executable (info
))
2919 if (!add_dynamic_entry (DT_DEBUG
, 0))
2925 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2926 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2927 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2928 || !add_dynamic_entry (DT_JMPREL
, 0))
2931 if (elf64_alpha_use_secureplt
2932 && !add_dynamic_entry (DT_ALPHA_PLTRO
, 1))
2938 if (!add_dynamic_entry (DT_RELA
, 0)
2939 || !add_dynamic_entry (DT_RELASZ
, 0)
2940 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2943 if (info
->flags
& DF_TEXTREL
)
2945 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2950 #undef add_dynamic_entry
2955 /* These functions do relaxation for Alpha ELF.
2957 Currently I'm only handling what I can do with existing compiler
2958 and assembler support, which means no instructions are removed,
2959 though some may be nopped. At this time GCC does not emit enough
2960 information to do all of the relaxing that is possible. It will
2961 take some not small amount of work for that to happen.
2963 There are a couple of interesting papers that I once read on this
2964 subject, that I cannot find references to at the moment, that
2965 related to Alpha in particular. They are by David Wall, then of
2968 struct alpha_relax_info
2973 Elf_Internal_Shdr
*symtab_hdr
;
2974 Elf_Internal_Rela
*relocs
, *relend
;
2975 struct bfd_link_info
*link_info
;
2979 struct alpha_elf_link_hash_entry
*h
;
2980 struct alpha_elf_got_entry
**first_gotent
;
2981 struct alpha_elf_got_entry
*gotent
;
2982 bfd_boolean changed_contents
;
2983 bfd_boolean changed_relocs
;
2984 unsigned char other
;
2987 static Elf_Internal_Rela
*
2988 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela
*rel
,
2989 Elf_Internal_Rela
*relend
,
2990 bfd_vma offset
, int type
)
2992 while (rel
< relend
)
2994 if (rel
->r_offset
== offset
2995 && ELF64_R_TYPE (rel
->r_info
) == (unsigned int) type
)
3003 elf64_alpha_relax_got_load (struct alpha_relax_info
*info
, bfd_vma symval
,
3004 Elf_Internal_Rela
*irel
, unsigned long r_type
)
3007 bfd_signed_vma disp
;
3009 /* Get the instruction. */
3010 insn
= bfd_get_32 (info
->abfd
, info
->contents
+ irel
->r_offset
);
3012 if (insn
>> 26 != OP_LDQ
)
3014 reloc_howto_type
*howto
= elf64_alpha_howto_table
+ r_type
;
3016 /* xgettext:c-format */
3017 (_("%pB: %pA+%#" PRIx64
": warning: "
3018 "%s relocation against unexpected insn"),
3019 info
->abfd
, info
->sec
, (uint64_t) irel
->r_offset
, howto
->name
);
3023 /* Can't relax dynamic symbols. */
3024 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3027 /* Can't use local-exec relocations in shared libraries. */
3028 if (r_type
== R_ALPHA_GOTTPREL
3029 && bfd_link_dll (info
->link_info
))
3032 if (r_type
== R_ALPHA_LITERAL
)
3034 /* Look for nice constant addresses. This includes the not-uncommon
3035 special case of 0 for undefweak symbols. */
3036 if ((info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3037 || (!bfd_link_pic (info
->link_info
)
3038 && (symval
>= (bfd_vma
)-0x8000 || symval
< 0x8000)))
3041 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3042 insn
|= (symval
& 0xffff);
3043 r_type
= R_ALPHA_NONE
;
3047 /* We may only create GPREL relocs during the second pass. */
3048 if (info
->link_info
->relax_pass
== 0)
3051 disp
= symval
- info
->gp
;
3052 insn
= (OP_LDA
<< 26) | (insn
& 0x03ff0000);
3053 r_type
= R_ALPHA_GPREL16
;
3058 bfd_vma dtp_base
, tp_base
;
3060 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3061 dtp_base
= alpha_get_dtprel_base (info
->link_info
);
3062 tp_base
= alpha_get_tprel_base (info
->link_info
);
3063 disp
= symval
- (r_type
== R_ALPHA_GOTDTPREL
? dtp_base
: tp_base
);
3065 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3069 case R_ALPHA_GOTDTPREL
:
3070 r_type
= R_ALPHA_DTPREL16
;
3072 case R_ALPHA_GOTTPREL
:
3073 r_type
= R_ALPHA_TPREL16
;
3081 if (disp
< -0x8000 || disp
>= 0x8000)
3084 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, info
->contents
+ irel
->r_offset
);
3085 info
->changed_contents
= TRUE
;
3087 /* Reduce the use count on this got entry by one, possibly
3089 if (--info
->gotent
->use_count
== 0)
3091 int sz
= alpha_got_entry_size (r_type
);
3092 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3094 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3097 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3098 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
), r_type
);
3099 info
->changed_relocs
= TRUE
;
3101 /* ??? Search forward through this basic block looking for insns
3102 that use the target register. Stop after an insn modifying the
3103 register is seen, or after a branch or call.
3105 Any such memory load insn may be substituted by a load directly
3106 off the GP. This allows the memory load insn to be issued before
3107 the calculated GP register would otherwise be ready.
3109 Any such jsr insn can be replaced by a bsr if it is in range.
3111 This would mean that we'd have to _add_ relocations, the pain of
3112 which gives one pause. */
3118 elf64_alpha_relax_opt_call (struct alpha_relax_info
*info
, bfd_vma symval
)
3120 /* If the function has the same gp, and we can identify that the
3121 function does not use its function pointer, we can eliminate the
3124 /* If the symbol is marked NOPV, we are being told the function never
3125 needs its procedure value. */
3126 if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_NOPV
)
3129 /* If the symbol is marked STD_GP, we are being told the function does
3130 a normal ldgp in the first two words. */
3131 else if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_STD_GPLOAD
)
3134 /* Otherwise, we may be able to identify a GP load in the first two
3135 words, which we can then skip. */
3138 Elf_Internal_Rela
*tsec_relocs
, *tsec_relend
, *tsec_free
, *gpdisp
;
3141 /* Load the relocations from the section that the target symbol is in. */
3142 if (info
->sec
== info
->tsec
)
3144 tsec_relocs
= info
->relocs
;
3145 tsec_relend
= info
->relend
;
3150 tsec_relocs
= (_bfd_elf_link_read_relocs
3151 (info
->abfd
, info
->tsec
, NULL
,
3152 (Elf_Internal_Rela
*) NULL
,
3153 info
->link_info
->keep_memory
));
3154 if (tsec_relocs
== NULL
)
3156 tsec_relend
= tsec_relocs
+ info
->tsec
->reloc_count
;
3157 tsec_free
= (elf_section_data (info
->tsec
)->relocs
== tsec_relocs
3162 /* Recover the symbol's offset within the section. */
3163 ofs
= (symval
- info
->tsec
->output_section
->vma
3164 - info
->tsec
->output_offset
);
3166 /* Look for a GPDISP reloc. */
3167 gpdisp
= (elf64_alpha_find_reloc_at_ofs
3168 (tsec_relocs
, tsec_relend
, ofs
, R_ALPHA_GPDISP
));
3170 if (!gpdisp
|| gpdisp
->r_addend
!= 4)
3180 /* We've now determined that we can skip an initial gp load. Verify
3181 that the call and the target use the same gp. */
3182 if (info
->link_info
->output_bfd
->xvec
!= info
->tsec
->owner
->xvec
3183 || info
->gotobj
!= alpha_elf_tdata (info
->tsec
->owner
)->gotobj
)
3190 elf64_alpha_relax_with_lituse (struct alpha_relax_info
*info
,
3191 bfd_vma symval
, Elf_Internal_Rela
*irel
)
3193 Elf_Internal_Rela
*urel
, *erel
, *irelend
= info
->relend
;
3195 bfd_signed_vma disp
;
3198 bfd_boolean lit_reused
= FALSE
;
3199 bfd_boolean all_optimized
= TRUE
;
3200 bfd_boolean changed_contents
;
3201 bfd_boolean changed_relocs
;
3202 bfd_byte
*contents
= info
->contents
;
3203 bfd
*abfd
= info
->abfd
;
3204 bfd_vma sec_output_vma
;
3205 unsigned int lit_insn
;
3208 lit_insn
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
3209 if (lit_insn
>> 26 != OP_LDQ
)
3212 /* xgettext:c-format */
3213 (_("%pB: %pA+%#" PRIx64
": warning: "
3214 "LITERAL relocation against unexpected insn"),
3215 abfd
, info
->sec
, (uint64_t) irel
->r_offset
);
3219 /* Can't relax dynamic symbols. */
3220 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3223 changed_contents
= info
->changed_contents
;
3224 changed_relocs
= info
->changed_relocs
;
3225 sec_output_vma
= info
->sec
->output_section
->vma
+ info
->sec
->output_offset
;
3226 relax_pass
= info
->link_info
->relax_pass
;
3228 /* Summarize how this particular LITERAL is used. */
3229 for (erel
= irel
+1, flags
= 0; erel
< irelend
; ++erel
)
3231 if (ELF64_R_TYPE (erel
->r_info
) != R_ALPHA_LITUSE
)
3233 if (erel
->r_addend
<= 6)
3234 flags
|= 1 << erel
->r_addend
;
3237 /* A little preparation for the loop... */
3238 disp
= symval
- info
->gp
;
3240 for (urel
= irel
+1; urel
< erel
; ++urel
)
3242 bfd_vma urel_r_offset
= urel
->r_offset
;
3245 bfd_signed_vma xdisp
;
3246 Elf_Internal_Rela nrel
;
3248 insn
= bfd_get_32 (abfd
, contents
+ urel_r_offset
);
3250 switch (urel
->r_addend
)
3252 case LITUSE_ALPHA_ADDR
:
3254 /* This type is really just a placeholder to note that all
3255 uses cannot be optimized, but to still allow some. */
3256 all_optimized
= FALSE
;
3259 case LITUSE_ALPHA_BASE
:
3260 /* We may only create GPREL relocs during the second pass. */
3261 if (relax_pass
== 0)
3263 all_optimized
= FALSE
;
3267 /* We can always optimize 16-bit displacements. */
3269 /* Extract the displacement from the instruction, sign-extending
3270 it if necessary, then test whether it is within 16 or 32 bits
3271 displacement from GP. */
3272 insn_disp
= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
3274 xdisp
= disp
+ insn_disp
;
3275 fits16
= (xdisp
>= - (bfd_signed_vma
) 0x8000 && xdisp
< 0x8000);
3276 fits32
= (xdisp
>= - (bfd_signed_vma
) 0x80000000
3277 && xdisp
< 0x7fff8000);
3281 /* Take the op code and dest from this insn, take the base
3282 register from the literal insn. Leave the offset alone. */
3283 insn
= (insn
& 0xffe0ffff) | (lit_insn
& 0x001f0000);
3284 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3285 changed_contents
= TRUE
;
3288 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3290 nrel
.r_addend
= irel
->r_addend
;
3292 /* As we adjust, move the reloc to the end so that we don't
3293 break the LITERAL+LITUSE chain. */
3297 changed_relocs
= TRUE
;
3300 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3301 else if (fits32
&& !(flags
& ~6))
3303 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3305 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3307 lit_insn
= (OP_LDAH
<< 26) | (lit_insn
& 0x03ff0000);
3308 bfd_put_32 (abfd
, (bfd_vma
) lit_insn
, contents
+ irel
->r_offset
);
3310 changed_contents
= TRUE
;
3312 /* Since all relocs must be optimized, don't bother swapping
3313 this relocation to the end. */
3314 urel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3316 urel
->r_addend
= irel
->r_addend
;
3317 changed_relocs
= TRUE
;
3320 all_optimized
= FALSE
;
3323 case LITUSE_ALPHA_BYTOFF
:
3324 /* We can always optimize byte instructions. */
3326 /* FIXME: sanity check the insn for byte op. Check that the
3327 literal dest reg is indeed Rb in the byte insn. */
3329 insn
&= ~ (unsigned) 0x001ff000;
3330 insn
|= ((symval
& 7) << 13) | 0x1000;
3331 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3332 changed_contents
= TRUE
;
3335 nrel
.r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3338 /* As we adjust, move the reloc to the end so that we don't
3339 break the LITERAL+LITUSE chain. */
3343 changed_relocs
= TRUE
;
3346 case LITUSE_ALPHA_JSR
:
3347 case LITUSE_ALPHA_TLSGD
:
3348 case LITUSE_ALPHA_TLSLDM
:
3349 case LITUSE_ALPHA_JSRDIRECT
:
3351 bfd_vma optdest
, org
;
3352 bfd_signed_vma odisp
;
3354 /* For undefined weak symbols, we're mostly interested in getting
3355 rid of the got entry whenever possible, so optimize this to a
3356 use of the zero register. */
3357 if (info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3360 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3362 changed_contents
= TRUE
;
3366 /* If not zero, place to jump without needing pv. */
3367 optdest
= elf64_alpha_relax_opt_call (info
, symval
);
3368 org
= sec_output_vma
+ urel_r_offset
+ 4;
3369 odisp
= (optdest
? optdest
: symval
) - org
;
3371 if (odisp
>= -0x400000 && odisp
< 0x400000)
3373 Elf_Internal_Rela
*xrel
;
3375 /* Preserve branch prediction call stack when possible. */
3376 if ((insn
& INSN_JSR_MASK
) == INSN_JSR
)
3377 insn
= (OP_BSR
<< 26) | (insn
& 0x03e00000);
3379 insn
= (OP_BR
<< 26) | (insn
& 0x03e00000);
3380 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3381 changed_contents
= TRUE
;
3384 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3386 nrel
.r_addend
= irel
->r_addend
;
3389 nrel
.r_addend
+= optdest
- symval
;
3391 all_optimized
= FALSE
;
3393 /* Kill any HINT reloc that might exist for this insn. */
3394 xrel
= (elf64_alpha_find_reloc_at_ofs
3395 (info
->relocs
, info
->relend
, urel_r_offset
,
3398 xrel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3400 /* As we adjust, move the reloc to the end so that we don't
3401 break the LITERAL+LITUSE chain. */
3406 info
->changed_relocs
= TRUE
;
3409 all_optimized
= FALSE
;
3411 /* Even if the target is not in range for a direct branch,
3412 if we share a GP, we can eliminate the gp reload. */
3415 Elf_Internal_Rela
*gpdisp
3416 = (elf64_alpha_find_reloc_at_ofs
3417 (info
->relocs
, irelend
, urel_r_offset
+ 4,
3421 bfd_byte
*p_ldah
= contents
+ gpdisp
->r_offset
;
3422 bfd_byte
*p_lda
= p_ldah
+ gpdisp
->r_addend
;
3423 unsigned int ldah
= bfd_get_32 (abfd
, p_ldah
);
3424 unsigned int lda
= bfd_get_32 (abfd
, p_lda
);
3426 /* Verify that the instruction is "ldah $29,0($26)".
3427 Consider a function that ends in a noreturn call,
3428 and that the next function begins with an ldgp,
3429 and that by accident there is no padding between.
3430 In that case the insn would use $27 as the base. */
3431 if (ldah
== 0x27ba0000 && lda
== 0x23bd0000)
3433 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_ldah
);
3434 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_lda
);
3436 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3437 changed_contents
= TRUE
;
3438 changed_relocs
= TRUE
;
3447 /* If we reused the literal instruction, we must have optimized all. */
3448 BFD_ASSERT(!lit_reused
|| all_optimized
);
3450 /* If all cases were optimized, we can reduce the use count on this
3451 got entry by one, possibly eliminating it. */
3454 if (--info
->gotent
->use_count
== 0)
3456 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3457 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3459 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3462 /* If the literal instruction is no longer needed (it may have been
3463 reused. We can eliminate it. */
3464 /* ??? For now, I don't want to deal with compacting the section,
3465 so just nop it out. */
3468 irel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3469 changed_relocs
= TRUE
;
3471 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, contents
+ irel
->r_offset
);
3472 changed_contents
= TRUE
;
3476 info
->changed_contents
= changed_contents
;
3477 info
->changed_relocs
= changed_relocs
;
3479 if (all_optimized
|| relax_pass
== 0)
3481 return elf64_alpha_relax_got_load (info
, symval
, irel
, R_ALPHA_LITERAL
);
3485 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info
*info
, bfd_vma symval
,
3486 Elf_Internal_Rela
*irel
, bfd_boolean is_gd
)
3489 unsigned int insn
, tlsgd_reg
;
3490 Elf_Internal_Rela
*gpdisp
, *hint
;
3491 bfd_boolean dynamic
, use_gottprel
;
3492 unsigned long new_symndx
;
3494 dynamic
= alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
);
3496 /* If a TLS symbol is accessed using IE at least once, there is no point
3497 to use dynamic model for it. */
3498 if (is_gd
&& info
->h
&& (info
->h
->flags
& ALPHA_ELF_LINK_HASH_TLS_IE
))
3501 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3502 then we might as well relax to IE. */
3503 else if (bfd_link_pic (info
->link_info
) && !dynamic
3504 && (info
->link_info
->flags
& DF_STATIC_TLS
))
3507 /* Otherwise we must be building an executable to do anything. */
3508 else if (bfd_link_pic (info
->link_info
))
3511 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3512 the matching LITUSE_TLS relocations. */
3513 if (irel
+ 2 >= info
->relend
)
3515 if (ELF64_R_TYPE (irel
[1].r_info
) != R_ALPHA_LITERAL
3516 || ELF64_R_TYPE (irel
[2].r_info
) != R_ALPHA_LITUSE
3517 || irel
[2].r_addend
!= (is_gd
? LITUSE_ALPHA_TLSGD
: LITUSE_ALPHA_TLSLDM
))
3520 /* There must be a GPDISP relocation positioned immediately after the
3521 LITUSE relocation. */
3522 gpdisp
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3523 irel
[2].r_offset
+ 4, R_ALPHA_GPDISP
);
3527 pos
[0] = info
->contents
+ irel
[0].r_offset
;
3528 pos
[1] = info
->contents
+ irel
[1].r_offset
;
3529 pos
[2] = info
->contents
+ irel
[2].r_offset
;
3530 pos
[3] = info
->contents
+ gpdisp
->r_offset
;
3531 pos
[4] = pos
[3] + gpdisp
->r_addend
;
3533 /* Beware of the compiler hoisting part of the sequence out a loop
3534 and adjusting the destination register for the TLSGD insn. If this
3535 happens, there will be a move into $16 before the JSR insn, so only
3536 transformations of the first insn pair should use this register. */
3537 tlsgd_reg
= bfd_get_32 (info
->abfd
, pos
[0]);
3538 tlsgd_reg
= (tlsgd_reg
>> 21) & 31;
3540 /* Generally, the positions are not allowed to be out of order, lest the
3541 modified insn sequence have different register lifetimes. We can make
3542 an exception when pos 1 is adjacent to pos 0. */
3543 if (pos
[1] + 4 == pos
[0])
3545 bfd_byte
*tmp
= pos
[0];
3549 if (pos
[1] >= pos
[2] || pos
[2] >= pos
[3])
3552 /* Reduce the use count on the LITERAL relocation. Do this before we
3553 smash the symndx when we adjust the relocations below. */
3555 struct alpha_elf_got_entry
*lit_gotent
;
3556 struct alpha_elf_link_hash_entry
*lit_h
;
3559 BFD_ASSERT (ELF64_R_SYM (irel
[1].r_info
) >= info
->symtab_hdr
->sh_info
);
3560 indx
= ELF64_R_SYM (irel
[1].r_info
) - info
->symtab_hdr
->sh_info
;
3561 lit_h
= alpha_elf_sym_hashes (info
->abfd
)[indx
];
3563 while (lit_h
->root
.root
.type
== bfd_link_hash_indirect
3564 || lit_h
->root
.root
.type
== bfd_link_hash_warning
)
3565 lit_h
= (struct alpha_elf_link_hash_entry
*) lit_h
->root
.root
.u
.i
.link
;
3567 for (lit_gotent
= lit_h
->got_entries
; lit_gotent
;
3568 lit_gotent
= lit_gotent
->next
)
3569 if (lit_gotent
->gotobj
== info
->gotobj
3570 && lit_gotent
->reloc_type
== R_ALPHA_LITERAL
3571 && lit_gotent
->addend
== irel
[1].r_addend
)
3573 BFD_ASSERT (lit_gotent
);
3575 if (--lit_gotent
->use_count
== 0)
3577 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3578 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3584 lda $16,x($gp) !tlsgd!1
3585 ldq $27,__tls_get_addr($gp) !literal!1
3586 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3587 ldah $29,0($26) !gpdisp!2
3588 lda $29,0($29) !gpdisp!2
3590 ldq $16,x($gp) !gottprel
3595 or the first pair to
3596 lda $16,x($gp) !tprel
3599 ldah $16,x($gp) !tprelhi
3600 lda $16,x($16) !tprello
3604 use_gottprel
= FALSE
;
3605 new_symndx
= is_gd
? ELF64_R_SYM (irel
->r_info
) : STN_UNDEF
;
3607 /* Some compilers warn about a Boolean-looking expression being
3608 used in a switch. The explicit cast silences them. */
3609 switch ((int) (!dynamic
&& !bfd_link_pic (info
->link_info
)))
3614 bfd_signed_vma disp
;
3616 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3617 tp_base
= alpha_get_tprel_base (info
->link_info
);
3618 disp
= symval
- tp_base
;
3620 if (disp
>= -0x8000 && disp
< 0x8000)
3622 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3623 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3624 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3626 irel
[0].r_offset
= pos
[0] - info
->contents
;
3627 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPREL16
);
3628 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3631 else if (disp
>= -(bfd_signed_vma
) 0x80000000
3632 && disp
< (bfd_signed_vma
) 0x7fff8000
3633 && pos
[0] + 4 == pos
[1])
3635 insn
= (OP_LDAH
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3636 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3637 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (tlsgd_reg
<< 16);
3638 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[1]);
3640 irel
[0].r_offset
= pos
[0] - info
->contents
;
3641 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELHI
);
3642 irel
[1].r_offset
= pos
[1] - info
->contents
;
3643 irel
[1].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELLO
);
3650 use_gottprel
= TRUE
;
3652 insn
= (OP_LDQ
<< 26) | (tlsgd_reg
<< 21) | (29 << 16);
3653 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3654 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3656 irel
[0].r_offset
= pos
[0] - info
->contents
;
3657 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_GOTTPREL
);
3658 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3662 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_RDUNIQ
, pos
[2]);
3664 insn
= INSN_ADDQ
| (16 << 21) | (0 << 16) | (0 << 0);
3665 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[3]);
3667 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[4]);
3669 irel
[2].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3670 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3672 hint
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3673 irel
[2].r_offset
, R_ALPHA_HINT
);
3675 hint
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3677 info
->changed_contents
= TRUE
;
3678 info
->changed_relocs
= TRUE
;
3680 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3681 if (--info
->gotent
->use_count
== 0)
3683 int sz
= alpha_got_entry_size (info
->gotent
->reloc_type
);
3684 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3686 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3689 /* If we've switched to a GOTTPREL relocation, increment the reference
3690 count on that got entry. */
3693 struct alpha_elf_got_entry
*tprel_gotent
;
3695 for (tprel_gotent
= *info
->first_gotent
; tprel_gotent
;
3696 tprel_gotent
= tprel_gotent
->next
)
3697 if (tprel_gotent
->gotobj
== info
->gotobj
3698 && tprel_gotent
->reloc_type
== R_ALPHA_GOTTPREL
3699 && tprel_gotent
->addend
== irel
->r_addend
)
3702 tprel_gotent
->use_count
++;
3705 if (info
->gotent
->use_count
== 0)
3706 tprel_gotent
= info
->gotent
;
3709 tprel_gotent
= (struct alpha_elf_got_entry
*)
3710 bfd_alloc (info
->abfd
, sizeof (struct alpha_elf_got_entry
));
3714 tprel_gotent
->next
= *info
->first_gotent
;
3715 *info
->first_gotent
= tprel_gotent
;
3717 tprel_gotent
->gotobj
= info
->gotobj
;
3718 tprel_gotent
->addend
= irel
->r_addend
;
3719 tprel_gotent
->got_offset
= -1;
3720 tprel_gotent
->reloc_done
= 0;
3721 tprel_gotent
->reloc_xlated
= 0;
3724 tprel_gotent
->use_count
= 1;
3725 tprel_gotent
->reloc_type
= R_ALPHA_GOTTPREL
;
3733 elf64_alpha_relax_section (bfd
*abfd
, asection
*sec
,
3734 struct bfd_link_info
*link_info
, bfd_boolean
*again
)
3736 Elf_Internal_Shdr
*symtab_hdr
;
3737 Elf_Internal_Rela
*internal_relocs
;
3738 Elf_Internal_Rela
*irel
, *irelend
;
3739 Elf_Internal_Sym
*isymbuf
= NULL
;
3740 struct alpha_elf_got_entry
**local_got_entries
;
3741 struct alpha_relax_info info
;
3742 struct alpha_elf_link_hash_table
* htab
;
3745 htab
= alpha_elf_hash_table (link_info
);
3749 /* There's nothing to change, yet. */
3752 if (bfd_link_relocatable (link_info
)
3753 || ((sec
->flags
& (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3754 != (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3755 || sec
->reloc_count
== 0)
3758 BFD_ASSERT (is_alpha_elf (abfd
));
3759 relax_pass
= link_info
->relax_pass
;
3761 /* Make sure our GOT and PLT tables are up-to-date. */
3762 if (htab
->relax_trip
!= link_info
->relax_trip
)
3764 htab
->relax_trip
= link_info
->relax_trip
;
3766 /* This should never fail after the initial round, since the only error
3767 is GOT overflow, and relaxation only shrinks the table. However, we
3768 may only merge got sections during the first pass. If we merge
3769 sections after we've created GPREL relocs, the GP for the merged
3770 section backs up which may put the relocs out of range. */
3771 if (!elf64_alpha_size_got_sections (link_info
, relax_pass
== 0))
3773 if (elf_hash_table (link_info
)->dynamic_sections_created
)
3775 elf64_alpha_size_plt_section (link_info
);
3776 elf64_alpha_size_rela_got_section (link_info
);
3780 symtab_hdr
= &elf_symtab_hdr (abfd
);
3781 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
3783 /* Load the relocations for this section. */
3784 internal_relocs
= (_bfd_elf_link_read_relocs
3785 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3786 link_info
->keep_memory
));
3787 if (internal_relocs
== NULL
)
3790 memset(&info
, 0, sizeof (info
));
3793 info
.link_info
= link_info
;
3794 info
.symtab_hdr
= symtab_hdr
;
3795 info
.relocs
= internal_relocs
;
3796 info
.relend
= irelend
= internal_relocs
+ sec
->reloc_count
;
3798 /* Find the GP for this object. Do not store the result back via
3799 _bfd_set_gp_value, since this could change again before final. */
3800 info
.gotobj
= alpha_elf_tdata (abfd
)->gotobj
;
3803 asection
*sgot
= alpha_elf_tdata (info
.gotobj
)->got
;
3804 info
.gp
= (sgot
->output_section
->vma
3805 + sgot
->output_offset
3809 /* Get the section contents. */
3810 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3811 info
.contents
= elf_section_data (sec
)->this_hdr
.contents
;
3814 if (!bfd_malloc_and_get_section (abfd
, sec
, &info
.contents
))
3818 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3821 struct alpha_elf_got_entry
*gotent
;
3822 unsigned long r_type
= ELF64_R_TYPE (irel
->r_info
);
3823 unsigned long r_symndx
= ELF64_R_SYM (irel
->r_info
);
3825 /* Early exit for unhandled or unrelaxable relocations. */
3826 if (r_type
!= R_ALPHA_LITERAL
)
3828 /* We complete everything except LITERAL in the first pass. */
3829 if (relax_pass
!= 0)
3831 if (r_type
== R_ALPHA_TLSLDM
)
3833 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3834 reloc to the STN_UNDEF (0) symbol so that they all match. */
3835 r_symndx
= STN_UNDEF
;
3837 else if (r_type
!= R_ALPHA_GOTDTPREL
3838 && r_type
!= R_ALPHA_GOTTPREL
3839 && r_type
!= R_ALPHA_TLSGD
)
3843 /* Get the value of the symbol referred to by the reloc. */
3844 if (r_symndx
< symtab_hdr
->sh_info
)
3846 /* A local symbol. */
3847 Elf_Internal_Sym
*isym
;
3849 /* Read this BFD's local symbols. */
3850 if (isymbuf
== NULL
)
3852 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3853 if (isymbuf
== NULL
)
3854 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
3855 symtab_hdr
->sh_info
, 0,
3857 if (isymbuf
== NULL
)
3861 isym
= isymbuf
+ r_symndx
;
3863 /* Given the symbol for a TLSLDM reloc is ignored, this also
3864 means forcing the symbol value to the tp base. */
3865 if (r_type
== R_ALPHA_TLSLDM
)
3867 info
.tsec
= bfd_abs_section_ptr
;
3868 symval
= alpha_get_tprel_base (info
.link_info
);
3872 symval
= isym
->st_value
;
3873 if (isym
->st_shndx
== SHN_UNDEF
)
3875 else if (isym
->st_shndx
== SHN_ABS
)
3876 info
.tsec
= bfd_abs_section_ptr
;
3877 else if (isym
->st_shndx
== SHN_COMMON
)
3878 info
.tsec
= bfd_com_section_ptr
;
3880 info
.tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3884 info
.other
= isym
->st_other
;
3885 if (local_got_entries
)
3886 info
.first_gotent
= &local_got_entries
[r_symndx
];
3889 info
.first_gotent
= &info
.gotent
;
3896 struct alpha_elf_link_hash_entry
*h
;
3898 indx
= r_symndx
- symtab_hdr
->sh_info
;
3899 h
= alpha_elf_sym_hashes (abfd
)[indx
];
3900 BFD_ASSERT (h
!= NULL
);
3902 while (h
->root
.root
.type
== bfd_link_hash_indirect
3903 || h
->root
.root
.type
== bfd_link_hash_warning
)
3904 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
3906 /* If the symbol is undefined, we can't do anything with it. */
3907 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
3910 /* If the symbol isn't defined in the current module,
3911 again we can't do anything. */
3912 if (h
->root
.root
.type
== bfd_link_hash_undefweak
)
3914 info
.tsec
= bfd_abs_section_ptr
;
3917 else if (!h
->root
.def_regular
)
3919 /* Except for TLSGD relocs, which can sometimes be
3920 relaxed to GOTTPREL relocs. */
3921 if (r_type
!= R_ALPHA_TLSGD
)
3923 info
.tsec
= bfd_abs_section_ptr
;
3928 info
.tsec
= h
->root
.root
.u
.def
.section
;
3929 symval
= h
->root
.root
.u
.def
.value
;
3933 info
.other
= h
->root
.other
;
3934 info
.first_gotent
= &h
->got_entries
;
3937 /* Search for the got entry to be used by this relocation. */
3938 for (gotent
= *info
.first_gotent
; gotent
; gotent
= gotent
->next
)
3939 if (gotent
->gotobj
== info
.gotobj
3940 && gotent
->reloc_type
== r_type
3941 && gotent
->addend
== irel
->r_addend
)
3943 info
.gotent
= gotent
;
3945 symval
+= info
.tsec
->output_section
->vma
+ info
.tsec
->output_offset
;
3946 symval
+= irel
->r_addend
;
3950 case R_ALPHA_LITERAL
:
3951 BFD_ASSERT(info
.gotent
!= NULL
);
3953 /* If there exist LITUSE relocations immediately following, this
3954 opens up all sorts of interesting optimizations, because we
3955 now know every location that this address load is used. */
3956 if (irel
+1 < irelend
3957 && ELF64_R_TYPE (irel
[1].r_info
) == R_ALPHA_LITUSE
)
3959 if (!elf64_alpha_relax_with_lituse (&info
, symval
, irel
))
3964 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3969 case R_ALPHA_GOTDTPREL
:
3970 case R_ALPHA_GOTTPREL
:
3971 BFD_ASSERT(info
.gotent
!= NULL
);
3972 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3977 case R_ALPHA_TLSLDM
:
3978 BFD_ASSERT(info
.gotent
!= NULL
);
3979 if (!elf64_alpha_relax_tls_get_addr (&info
, symval
, irel
,
3980 r_type
== R_ALPHA_TLSGD
))
3987 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
3989 if (!link_info
->keep_memory
)
3993 /* Cache the symbols for elf_link_input_bfd. */
3994 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
3998 if (info
.contents
!= NULL
3999 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4001 if (!info
.changed_contents
&& !link_info
->keep_memory
)
4002 free (info
.contents
);
4005 /* Cache the section contents for elf_link_input_bfd. */
4006 elf_section_data (sec
)->this_hdr
.contents
= info
.contents
;
4010 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
4012 if (!info
.changed_relocs
)
4013 free (internal_relocs
);
4015 elf_section_data (sec
)->relocs
= internal_relocs
;
4018 *again
= info
.changed_contents
|| info
.changed_relocs
;
4024 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4026 if (info
.contents
!= NULL
4027 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4028 free (info
.contents
);
4029 if (internal_relocs
!= NULL
4030 && elf_section_data (sec
)->relocs
!= internal_relocs
)
4031 free (internal_relocs
);
4035 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4036 into the next available slot in SREL. */
4039 elf64_alpha_emit_dynrel (bfd
*abfd
, struct bfd_link_info
*info
,
4040 asection
*sec
, asection
*srel
, bfd_vma offset
,
4041 long dynindx
, long rtype
, bfd_vma addend
)
4043 Elf_Internal_Rela outrel
;
4046 BFD_ASSERT (srel
!= NULL
);
4048 outrel
.r_info
= ELF64_R_INFO (dynindx
, rtype
);
4049 outrel
.r_addend
= addend
;
4051 offset
= _bfd_elf_section_offset (abfd
, info
, sec
, offset
);
4052 if ((offset
| 1) != (bfd_vma
) -1)
4053 outrel
.r_offset
= sec
->output_section
->vma
+ sec
->output_offset
+ offset
;
4055 memset (&outrel
, 0, sizeof (outrel
));
4057 loc
= srel
->contents
;
4058 loc
+= srel
->reloc_count
++ * sizeof (Elf64_External_Rela
);
4059 bfd_elf64_swap_reloca_out (abfd
, &outrel
, loc
);
4060 BFD_ASSERT (sizeof (Elf64_External_Rela
) * srel
->reloc_count
<= srel
->size
);
4063 /* Relocate an Alpha ELF section for a relocatable link.
4065 We don't have to change anything unless the reloc is against a section
4066 symbol, in which case we have to adjust according to where the section
4067 symbol winds up in the output section. */
4070 elf64_alpha_relocate_section_r (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4071 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4072 bfd
*input_bfd
, asection
*input_section
,
4073 bfd_byte
*contents ATTRIBUTE_UNUSED
,
4074 Elf_Internal_Rela
*relocs
,
4075 Elf_Internal_Sym
*local_syms
,
4076 asection
**local_sections
)
4078 unsigned long symtab_hdr_sh_info
;
4079 Elf_Internal_Rela
*rel
;
4080 Elf_Internal_Rela
*relend
;
4081 struct elf_link_hash_entry
**sym_hashes
;
4082 bfd_boolean ret_val
= TRUE
;
4084 symtab_hdr_sh_info
= elf_symtab_hdr (input_bfd
).sh_info
;
4085 sym_hashes
= elf_sym_hashes (input_bfd
);
4087 relend
= relocs
+ input_section
->reloc_count
;
4088 for (rel
= relocs
; rel
< relend
; rel
++)
4090 unsigned long r_symndx
;
4091 Elf_Internal_Sym
*sym
;
4093 unsigned long r_type
;
4095 r_type
= ELF64_R_TYPE (rel
->r_info
);
4096 if (r_type
>= R_ALPHA_max
)
4099 /* xgettext:c-format */
4100 (_("%pB: unknown relocation type %d"),
4101 input_bfd
, (int) r_type
);
4102 bfd_set_error (bfd_error_bad_value
);
4107 /* The symbol associated with GPDISP and LITUSE is
4108 immaterial. Only the addend is significant. */
4109 if (r_type
== R_ALPHA_GPDISP
|| r_type
== R_ALPHA_LITUSE
)
4112 r_symndx
= ELF64_R_SYM (rel
->r_info
);
4113 if (r_symndx
< symtab_hdr_sh_info
)
4115 sym
= local_syms
+ r_symndx
;
4116 sec
= local_sections
[r_symndx
];
4120 struct elf_link_hash_entry
*h
;
4122 h
= sym_hashes
[r_symndx
- symtab_hdr_sh_info
];
4124 while (h
->root
.type
== bfd_link_hash_indirect
4125 || h
->root
.type
== bfd_link_hash_warning
)
4126 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4128 if (h
->root
.type
!= bfd_link_hash_defined
4129 && h
->root
.type
!= bfd_link_hash_defweak
)
4133 sec
= h
->root
.u
.def
.section
;
4136 if (sec
!= NULL
&& discarded_section (sec
))
4137 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4139 elf64_alpha_howto_table
+ r_type
, 0,
4142 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
4143 rel
->r_addend
+= sec
->output_offset
;
4149 /* Relocate an Alpha ELF section. */
4152 elf64_alpha_relocate_section (bfd
*output_bfd
, struct bfd_link_info
*info
,
4153 bfd
*input_bfd
, asection
*input_section
,
4154 bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
4155 Elf_Internal_Sym
*local_syms
,
4156 asection
**local_sections
)
4158 Elf_Internal_Shdr
*symtab_hdr
;
4159 Elf_Internal_Rela
*rel
;
4160 Elf_Internal_Rela
*relend
;
4161 asection
*sgot
, *srel
, *srelgot
;
4162 bfd
*dynobj
, *gotobj
;
4163 bfd_vma gp
, tp_base
, dtp_base
;
4164 struct alpha_elf_got_entry
**local_got_entries
;
4165 bfd_boolean ret_val
;
4167 BFD_ASSERT (is_alpha_elf (input_bfd
));
4169 /* Handle relocatable links with a smaller loop. */
4170 if (bfd_link_relocatable (info
))
4171 return elf64_alpha_relocate_section_r (output_bfd
, info
, input_bfd
,
4172 input_section
, contents
, relocs
,
4173 local_syms
, local_sections
);
4175 /* This is a final link. */
4179 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4181 dynobj
= elf_hash_table (info
)->dynobj
;
4182 srelgot
= elf_hash_table (info
)->srelgot
;
4184 if (input_section
->flags
& SEC_ALLOC
)
4186 const char *section_name
;
4187 section_name
= (bfd_elf_string_from_elf_section
4188 (input_bfd
, elf_elfheader(input_bfd
)->e_shstrndx
,
4189 _bfd_elf_single_rel_hdr (input_section
)->sh_name
));
4190 BFD_ASSERT(section_name
!= NULL
);
4191 srel
= bfd_get_linker_section (dynobj
, section_name
);
4196 /* Find the gp value for this input bfd. */
4197 gotobj
= alpha_elf_tdata (input_bfd
)->gotobj
;
4200 sgot
= alpha_elf_tdata (gotobj
)->got
;
4201 gp
= _bfd_get_gp_value (gotobj
);
4204 gp
= (sgot
->output_section
->vma
4205 + sgot
->output_offset
4207 _bfd_set_gp_value (gotobj
, gp
);
4216 local_got_entries
= alpha_elf_tdata(input_bfd
)->local_got_entries
;
4218 if (elf_hash_table (info
)->tls_sec
!= NULL
)
4220 dtp_base
= alpha_get_dtprel_base (info
);
4221 tp_base
= alpha_get_tprel_base (info
);
4224 dtp_base
= tp_base
= 0;
4226 relend
= relocs
+ input_section
->reloc_count
;
4227 for (rel
= relocs
; rel
< relend
; rel
++)
4229 struct alpha_elf_link_hash_entry
*h
= NULL
;
4230 struct alpha_elf_got_entry
*gotent
;
4231 bfd_reloc_status_type r
;
4232 reloc_howto_type
*howto
;
4233 unsigned long r_symndx
;
4234 Elf_Internal_Sym
*sym
= NULL
;
4235 asection
*sec
= NULL
;
4238 bfd_boolean dynamic_symbol_p
;
4239 bfd_boolean unresolved_reloc
= FALSE
;
4240 bfd_boolean undef_weak_ref
= FALSE
;
4241 unsigned long r_type
;
4243 r_type
= ELF64_R_TYPE(rel
->r_info
);
4244 if (r_type
>= R_ALPHA_max
)
4247 /* xgettext:c-format */
4248 (_("%pB: unknown relocation type %d"),
4249 input_bfd
, (int) r_type
);
4250 bfd_set_error (bfd_error_bad_value
);
4255 howto
= elf64_alpha_howto_table
+ r_type
;
4256 r_symndx
= ELF64_R_SYM(rel
->r_info
);
4258 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4259 reloc to the STN_UNDEF (0) symbol so that they all match. */
4260 if (r_type
== R_ALPHA_TLSLDM
)
4261 r_symndx
= STN_UNDEF
;
4263 if (r_symndx
< symtab_hdr
->sh_info
)
4266 sym
= local_syms
+ r_symndx
;
4267 sec
= local_sections
[r_symndx
];
4269 value
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &msec
, rel
);
4271 /* If this is a tp-relative relocation against sym STN_UNDEF (0),
4272 this is hackery from relax_section. Force the value to
4273 be the tls module base. */
4274 if (r_symndx
== STN_UNDEF
4275 && (r_type
== R_ALPHA_TLSLDM
4276 || r_type
== R_ALPHA_GOTTPREL
4277 || r_type
== R_ALPHA_TPREL64
4278 || r_type
== R_ALPHA_TPRELHI
4279 || r_type
== R_ALPHA_TPRELLO
4280 || r_type
== R_ALPHA_TPREL16
))
4283 if (local_got_entries
)
4284 gotent
= local_got_entries
[r_symndx
];
4288 /* Need to adjust local GOT entries' addends for SEC_MERGE
4289 unless it has been done already. */
4290 if ((sec
->flags
& SEC_MERGE
)
4291 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
4292 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
4294 && !gotent
->reloc_xlated
)
4296 struct alpha_elf_got_entry
*ent
;
4298 for (ent
= gotent
; ent
; ent
= ent
->next
)
4300 ent
->reloc_xlated
= 1;
4301 if (ent
->use_count
== 0)
4305 _bfd_merged_section_offset (output_bfd
, &msec
,
4306 elf_section_data (sec
)->
4308 sym
->st_value
+ ent
->addend
);
4309 ent
->addend
-= sym
->st_value
;
4310 ent
->addend
+= msec
->output_section
->vma
4311 + msec
->output_offset
4312 - sec
->output_section
->vma
4313 - sec
->output_offset
;
4317 dynamic_symbol_p
= FALSE
;
4321 bfd_boolean warned
, ignored
;
4322 struct elf_link_hash_entry
*hh
;
4323 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
4325 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4326 r_symndx
, symtab_hdr
, sym_hashes
,
4328 unresolved_reloc
, warned
, ignored
);
4334 && ! unresolved_reloc
4335 && hh
->root
.type
== bfd_link_hash_undefweak
)
4336 undef_weak_ref
= TRUE
;
4338 h
= (struct alpha_elf_link_hash_entry
*) hh
;
4339 dynamic_symbol_p
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
4340 gotent
= h
->got_entries
;
4343 if (sec
!= NULL
&& discarded_section (sec
))
4344 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4345 rel
, 1, relend
, howto
, 0, contents
);
4347 addend
= rel
->r_addend
;
4350 /* Search for the proper got entry. */
4351 for (; gotent
; gotent
= gotent
->next
)
4352 if (gotent
->gotobj
== gotobj
4353 && gotent
->reloc_type
== r_type
4354 && gotent
->addend
== addend
)
4359 case R_ALPHA_GPDISP
:
4361 bfd_byte
*p_ldah
, *p_lda
;
4363 BFD_ASSERT(gp
!= 0);
4365 value
= (input_section
->output_section
->vma
4366 + input_section
->output_offset
4369 p_ldah
= contents
+ rel
->r_offset
;
4370 p_lda
= p_ldah
+ rel
->r_addend
;
4372 r
= elf64_alpha_do_reloc_gpdisp (input_bfd
, gp
- value
,
4377 case R_ALPHA_LITERAL
:
4378 BFD_ASSERT(sgot
!= NULL
);
4379 BFD_ASSERT(gp
!= 0);
4380 BFD_ASSERT(gotent
!= NULL
);
4381 BFD_ASSERT(gotent
->use_count
>= 1);
4383 if (!gotent
->reloc_done
)
4385 gotent
->reloc_done
= 1;
4387 bfd_put_64 (output_bfd
, value
,
4388 sgot
->contents
+ gotent
->got_offset
);
4390 /* If the symbol has been forced local, output a
4391 RELATIVE reloc, otherwise it will be handled in
4392 finish_dynamic_symbol. */
4393 if (bfd_link_pic (info
)
4394 && !dynamic_symbol_p
4396 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4397 gotent
->got_offset
, 0,
4398 R_ALPHA_RELATIVE
, value
);
4401 value
= (sgot
->output_section
->vma
4402 + sgot
->output_offset
4403 + gotent
->got_offset
);
4407 case R_ALPHA_GPREL32
:
4408 case R_ALPHA_GPREL16
:
4409 case R_ALPHA_GPRELLOW
:
4410 if (dynamic_symbol_p
)
4413 /* xgettext:c-format */
4414 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4415 input_bfd
, h
->root
.root
.root
.string
);
4418 BFD_ASSERT(gp
!= 0);
4422 case R_ALPHA_GPRELHIGH
:
4423 if (dynamic_symbol_p
)
4426 /* xgettext:c-format */
4427 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4428 input_bfd
, h
->root
.root
.root
.string
);
4431 BFD_ASSERT(gp
!= 0);
4433 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4437 /* A call to a dynamic symbol is definitely out of range of
4438 the 16-bit displacement. Don't bother writing anything. */
4439 if (dynamic_symbol_p
)
4444 /* The regular PC-relative stuff measures from the start of
4445 the instruction rather than the end. */
4449 case R_ALPHA_BRADDR
:
4450 if (dynamic_symbol_p
)
4453 /* xgettext:c-format */
4454 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4455 input_bfd
, h
->root
.root
.root
.string
);
4458 /* The regular PC-relative stuff measures from the start of
4459 the instruction rather than the end. */
4468 /* The regular PC-relative stuff measures from the start of
4469 the instruction rather than the end. */
4472 /* The source and destination gp must be the same. Note that
4473 the source will always have an assigned gp, since we forced
4474 one in check_relocs, but that the destination may not, as
4475 it might not have had any relocations at all. Also take
4476 care not to crash if H is an undefined symbol. */
4477 if (h
!= NULL
&& sec
!= NULL
4478 && alpha_elf_tdata (sec
->owner
)->gotobj
4479 && gotobj
!= alpha_elf_tdata (sec
->owner
)->gotobj
)
4482 /* xgettext:c-format */
4483 (_("%pB: change in gp: BRSGP %s"),
4484 input_bfd
, h
->root
.root
.root
.string
);
4488 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4490 other
= h
->root
.other
;
4492 other
= sym
->st_other
;
4493 switch (other
& STO_ALPHA_STD_GPLOAD
)
4495 case STO_ALPHA_NOPV
:
4497 case STO_ALPHA_STD_GPLOAD
:
4502 name
= h
->root
.root
.root
.string
;
4505 name
= (bfd_elf_string_from_elf_section
4506 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4508 name
= _("<unknown>");
4509 else if (name
[0] == 0)
4510 name
= bfd_section_name (input_bfd
, sec
);
4513 /* xgettext:c-format */
4514 (_("%pB: !samegp reloc against symbol without .prologue: %s"),
4523 case R_ALPHA_REFLONG
:
4524 case R_ALPHA_REFQUAD
:
4525 case R_ALPHA_DTPREL64
:
4526 case R_ALPHA_TPREL64
:
4528 long dynindx
, dyntype
= r_type
;
4531 /* Careful here to remember RELATIVE relocations for global
4532 variables for symbolic shared objects. */
4534 if (dynamic_symbol_p
)
4536 BFD_ASSERT(h
->root
.dynindx
!= -1);
4537 dynindx
= h
->root
.dynindx
;
4539 addend
= 0, value
= 0;
4541 else if (r_type
== R_ALPHA_DTPREL64
)
4543 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4547 else if (r_type
== R_ALPHA_TPREL64
)
4549 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4550 if (!bfd_link_dll (info
))
4556 dynaddend
= value
- dtp_base
;
4558 else if (bfd_link_pic (info
)
4559 && r_symndx
!= STN_UNDEF
4560 && (input_section
->flags
& SEC_ALLOC
)
4562 && !(unresolved_reloc
4563 && (_bfd_elf_section_offset (output_bfd
, info
,
4568 if (r_type
== R_ALPHA_REFLONG
)
4571 /* xgettext:c-format */
4572 (_("%pB: unhandled dynamic relocation against %s"),
4574 h
->root
.root
.root
.string
);
4578 dyntype
= R_ALPHA_RELATIVE
;
4584 if (input_section
->flags
& SEC_ALLOC
)
4585 elf64_alpha_emit_dynrel (output_bfd
, info
, input_section
,
4586 srel
, rel
->r_offset
, dynindx
,
4587 dyntype
, dynaddend
);
4591 case R_ALPHA_SREL16
:
4592 case R_ALPHA_SREL32
:
4593 case R_ALPHA_SREL64
:
4594 if (dynamic_symbol_p
)
4597 /* xgettext:c-format */
4598 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4599 input_bfd
, h
->root
.root
.root
.string
);
4602 else if (bfd_link_pic (info
)
4606 /* xgettext:c-format */
4607 (_("%pB: pc-relative relocation against undefined weak symbol %s"),
4608 input_bfd
, h
->root
.root
.root
.string
);
4613 /* ??? .eh_frame references to discarded sections will be smashed
4614 to relocations against SHN_UNDEF. The .eh_frame format allows
4615 NULL to be encoded as 0 in any format, so this works here. */
4616 if (r_symndx
== STN_UNDEF
4617 || (unresolved_reloc
4618 && _bfd_elf_section_offset (output_bfd
, info
,
4620 rel
->r_offset
) == (bfd_vma
) -1))
4621 howto
= (elf64_alpha_howto_table
4622 + (r_type
- R_ALPHA_SREL32
+ R_ALPHA_REFLONG
));
4625 case R_ALPHA_TLSLDM
:
4626 /* Ignore the symbol for the relocation. The result is always
4627 the current module. */
4628 dynamic_symbol_p
= 0;
4632 if (!gotent
->reloc_done
)
4634 gotent
->reloc_done
= 1;
4636 /* Note that the module index for the main program is 1. */
4637 bfd_put_64 (output_bfd
,
4638 !bfd_link_pic (info
) && !dynamic_symbol_p
,
4639 sgot
->contents
+ gotent
->got_offset
);
4641 /* If the symbol has been forced local, output a
4642 DTPMOD64 reloc, otherwise it will be handled in
4643 finish_dynamic_symbol. */
4644 if (bfd_link_pic (info
) && !dynamic_symbol_p
)
4645 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4646 gotent
->got_offset
, 0,
4647 R_ALPHA_DTPMOD64
, 0);
4649 if (dynamic_symbol_p
|| r_type
== R_ALPHA_TLSLDM
)
4653 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4656 bfd_put_64 (output_bfd
, value
,
4657 sgot
->contents
+ gotent
->got_offset
+ 8);
4660 value
= (sgot
->output_section
->vma
4661 + sgot
->output_offset
4662 + gotent
->got_offset
);
4666 case R_ALPHA_DTPRELHI
:
4667 case R_ALPHA_DTPRELLO
:
4668 case R_ALPHA_DTPREL16
:
4669 if (dynamic_symbol_p
)
4672 /* xgettext:c-format */
4673 (_("%pB: dtp-relative relocation against dynamic symbol %s"),
4674 input_bfd
, h
->root
.root
.root
.string
);
4677 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4679 if (r_type
== R_ALPHA_DTPRELHI
)
4680 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4683 case R_ALPHA_TPRELHI
:
4684 case R_ALPHA_TPRELLO
:
4685 case R_ALPHA_TPREL16
:
4686 if (bfd_link_dll (info
))
4689 /* xgettext:c-format */
4690 (_("%pB: TLS local exec code cannot be linked into shared objects"),
4694 else if (dynamic_symbol_p
)
4697 /* xgettext:c-format */
4698 (_("%pB: tp-relative relocation against dynamic symbol %s"),
4699 input_bfd
, h
->root
.root
.root
.string
);
4702 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4704 if (r_type
== R_ALPHA_TPRELHI
)
4705 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4708 case R_ALPHA_GOTDTPREL
:
4709 case R_ALPHA_GOTTPREL
:
4710 BFD_ASSERT(sgot
!= NULL
);
4711 BFD_ASSERT(gp
!= 0);
4712 BFD_ASSERT(gotent
!= NULL
);
4713 BFD_ASSERT(gotent
->use_count
>= 1);
4715 if (!gotent
->reloc_done
)
4717 gotent
->reloc_done
= 1;
4719 if (dynamic_symbol_p
)
4723 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4724 if (r_type
== R_ALPHA_GOTDTPREL
)
4726 else if (!bfd_link_pic (info
))
4730 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4731 gotent
->got_offset
, 0,
4737 bfd_put_64 (output_bfd
, value
,
4738 sgot
->contents
+ gotent
->got_offset
);
4741 value
= (sgot
->output_section
->vma
4742 + sgot
->output_offset
4743 + gotent
->got_offset
);
4749 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4750 contents
, rel
->r_offset
, value
, 0);
4759 case bfd_reloc_overflow
:
4763 /* Don't warn if the overflow is due to pc relative reloc
4764 against discarded section. Section optimization code should
4767 if (r_symndx
< symtab_hdr
->sh_info
4768 && sec
!= NULL
&& howto
->pc_relative
4769 && discarded_section (sec
))
4776 name
= (bfd_elf_string_from_elf_section
4777 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4781 name
= bfd_section_name (input_bfd
, sec
);
4783 (*info
->callbacks
->reloc_overflow
)
4784 (info
, (h
? &h
->root
.root
: NULL
), name
, howto
->name
,
4785 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4790 case bfd_reloc_outofrange
:
4798 /* Finish up dynamic symbol handling. We set the contents of various
4799 dynamic sections here. */
4802 elf64_alpha_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
4803 struct elf_link_hash_entry
*h
,
4804 Elf_Internal_Sym
*sym
)
4806 struct alpha_elf_link_hash_entry
*ah
= (struct alpha_elf_link_hash_entry
*)h
;
4810 /* Fill in the .plt entry for this symbol. */
4811 asection
*splt
, *sgot
, *srel
;
4812 Elf_Internal_Rela outrel
;
4814 bfd_vma got_addr
, plt_addr
;
4816 struct alpha_elf_got_entry
*gotent
;
4818 BFD_ASSERT (h
->dynindx
!= -1);
4820 splt
= elf_hash_table (info
)->splt
;
4821 BFD_ASSERT (splt
!= NULL
);
4822 srel
= elf_hash_table (info
)->srelplt
;
4823 BFD_ASSERT (srel
!= NULL
);
4825 for (gotent
= ah
->got_entries
; gotent
; gotent
= gotent
->next
)
4826 if (gotent
->reloc_type
== R_ALPHA_LITERAL
4827 && gotent
->use_count
> 0)
4832 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4833 BFD_ASSERT (sgot
!= NULL
);
4835 BFD_ASSERT (gotent
->got_offset
!= -1);
4836 BFD_ASSERT (gotent
->plt_offset
!= -1);
4838 got_addr
= (sgot
->output_section
->vma
4839 + sgot
->output_offset
4840 + gotent
->got_offset
);
4841 plt_addr
= (splt
->output_section
->vma
4842 + splt
->output_offset
4843 + gotent
->plt_offset
);
4845 plt_index
= (gotent
->plt_offset
-PLT_HEADER_SIZE
) / PLT_ENTRY_SIZE
;
4847 /* Fill in the entry in the procedure linkage table. */
4848 if (elf64_alpha_use_secureplt
)
4850 disp
= (PLT_HEADER_SIZE
- 4) - (gotent
->plt_offset
+ 4);
4851 insn
= INSN_AD (INSN_BR
, 31, disp
);
4852 bfd_put_32 (output_bfd
, insn
,
4853 splt
->contents
+ gotent
->plt_offset
);
4855 plt_index
= ((gotent
->plt_offset
- NEW_PLT_HEADER_SIZE
)
4856 / NEW_PLT_ENTRY_SIZE
);
4860 disp
= -(gotent
->plt_offset
+ 4);
4861 insn
= INSN_AD (INSN_BR
, 28, disp
);
4862 bfd_put_32 (output_bfd
, insn
,
4863 splt
->contents
+ gotent
->plt_offset
);
4864 bfd_put_32 (output_bfd
, INSN_UNOP
,
4865 splt
->contents
+ gotent
->plt_offset
+ 4);
4866 bfd_put_32 (output_bfd
, INSN_UNOP
,
4867 splt
->contents
+ gotent
->plt_offset
+ 8);
4869 plt_index
= ((gotent
->plt_offset
- OLD_PLT_HEADER_SIZE
)
4870 / OLD_PLT_ENTRY_SIZE
);
4873 /* Fill in the entry in the .rela.plt section. */
4874 outrel
.r_offset
= got_addr
;
4875 outrel
.r_info
= ELF64_R_INFO(h
->dynindx
, R_ALPHA_JMP_SLOT
);
4876 outrel
.r_addend
= 0;
4878 loc
= srel
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
4879 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
4881 /* Fill in the entry in the .got. */
4882 bfd_put_64 (output_bfd
, plt_addr
,
4883 sgot
->contents
+ gotent
->got_offset
);
4886 else if (alpha_elf_dynamic_symbol_p (h
, info
))
4888 /* Fill in the dynamic relocations for this symbol's .got entries. */
4890 struct alpha_elf_got_entry
*gotent
;
4892 srel
= elf_hash_table (info
)->srelgot
;
4893 BFD_ASSERT (srel
!= NULL
);
4895 for (gotent
= ((struct alpha_elf_link_hash_entry
*) h
)->got_entries
;
4897 gotent
= gotent
->next
)
4902 if (gotent
->use_count
== 0)
4905 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4907 r_type
= gotent
->reloc_type
;
4910 case R_ALPHA_LITERAL
:
4911 r_type
= R_ALPHA_GLOB_DAT
;
4914 r_type
= R_ALPHA_DTPMOD64
;
4916 case R_ALPHA_GOTDTPREL
:
4917 r_type
= R_ALPHA_DTPREL64
;
4919 case R_ALPHA_GOTTPREL
:
4920 r_type
= R_ALPHA_TPREL64
;
4922 case R_ALPHA_TLSLDM
:
4927 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4928 gotent
->got_offset
, h
->dynindx
,
4929 r_type
, gotent
->addend
);
4931 if (gotent
->reloc_type
== R_ALPHA_TLSGD
)
4932 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4933 gotent
->got_offset
+ 8, h
->dynindx
,
4934 R_ALPHA_DTPREL64
, gotent
->addend
);
4938 /* Mark some specially defined symbols as absolute. */
4939 if (h
== elf_hash_table (info
)->hdynamic
4940 || h
== elf_hash_table (info
)->hgot
4941 || h
== elf_hash_table (info
)->hplt
)
4942 sym
->st_shndx
= SHN_ABS
;
4947 /* Finish up the dynamic sections. */
4950 elf64_alpha_finish_dynamic_sections (bfd
*output_bfd
,
4951 struct bfd_link_info
*info
)
4956 dynobj
= elf_hash_table (info
)->dynobj
;
4957 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4959 if (elf_hash_table (info
)->dynamic_sections_created
)
4961 asection
*splt
, *sgotplt
, *srelaplt
;
4962 Elf64_External_Dyn
*dyncon
, *dynconend
;
4963 bfd_vma plt_vma
, gotplt_vma
;
4965 splt
= elf_hash_table (info
)->splt
;
4966 srelaplt
= elf_hash_table (info
)->srelplt
;
4967 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
4969 plt_vma
= splt
->output_section
->vma
+ splt
->output_offset
;
4972 if (elf64_alpha_use_secureplt
)
4974 sgotplt
= elf_hash_table (info
)->sgotplt
;
4975 BFD_ASSERT (sgotplt
!= NULL
);
4976 if (sgotplt
->size
> 0)
4977 gotplt_vma
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
4980 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
4981 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4982 for (; dyncon
< dynconend
; dyncon
++)
4984 Elf_Internal_Dyn dyn
;
4986 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4992 = elf64_alpha_use_secureplt
? gotplt_vma
: plt_vma
;
4995 dyn
.d_un
.d_val
= srelaplt
? srelaplt
->size
: 0;
4998 dyn
.d_un
.d_ptr
= srelaplt
? (srelaplt
->output_section
->vma
4999 + srelaplt
->output_offset
) : 0;
5003 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5006 /* Initialize the plt header. */
5012 if (elf64_alpha_use_secureplt
)
5014 ofs
= gotplt_vma
- (plt_vma
+ PLT_HEADER_SIZE
);
5016 insn
= INSN_ABC (INSN_SUBQ
, 27, 28, 25);
5017 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5019 insn
= INSN_ABO (INSN_LDAH
, 28, 28, (ofs
+ 0x8000) >> 16);
5020 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5022 insn
= INSN_ABC (INSN_S4SUBQ
, 25, 25, 25);
5023 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5025 insn
= INSN_ABO (INSN_LDA
, 28, 28, ofs
);
5026 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5028 insn
= INSN_ABO (INSN_LDQ
, 27, 28, 0);
5029 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 16);
5031 insn
= INSN_ABC (INSN_ADDQ
, 25, 25, 25);
5032 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 20);
5034 insn
= INSN_ABO (INSN_LDQ
, 28, 28, 8);
5035 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 24);
5037 insn
= INSN_AB (INSN_JMP
, 31, 27);
5038 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 28);
5040 insn
= INSN_AD (INSN_BR
, 28, -PLT_HEADER_SIZE
);
5041 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 32);
5045 insn
= INSN_AD (INSN_BR
, 27, 0); /* br $27, .+4 */
5046 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5048 insn
= INSN_ABO (INSN_LDQ
, 27, 27, 12);
5049 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5052 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5054 insn
= INSN_AB (INSN_JMP
, 27, 27);
5055 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5057 /* The next two words will be filled in by ld.so. */
5058 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 16);
5059 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 24);
5062 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 0;
5069 /* We need to use a special link routine to handle the .mdebug section.
5070 We need to merge all instances of these sections together, not write
5071 them all out sequentially. */
5074 elf64_alpha_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5077 struct bfd_link_order
*p
;
5078 asection
*mdebug_sec
;
5079 struct ecoff_debug_info debug
;
5080 const struct ecoff_debug_swap
*swap
5081 = get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
5082 HDRR
*symhdr
= &debug
.symbolic_header
;
5083 void * mdebug_handle
= NULL
;
5084 struct alpha_elf_link_hash_table
* htab
;
5086 htab
= alpha_elf_hash_table (info
);
5090 /* Go through the sections and collect the mdebug information. */
5092 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
5094 if (strcmp (o
->name
, ".mdebug") == 0)
5096 struct extsym_info einfo
;
5098 /* We have found the .mdebug section in the output file.
5099 Look through all the link_orders comprising it and merge
5100 the information together. */
5101 symhdr
->magic
= swap
->sym_magic
;
5102 /* FIXME: What should the version stamp be? */
5104 symhdr
->ilineMax
= 0;
5108 symhdr
->isymMax
= 0;
5109 symhdr
->ioptMax
= 0;
5110 symhdr
->iauxMax
= 0;
5112 symhdr
->issExtMax
= 0;
5115 symhdr
->iextMax
= 0;
5117 /* We accumulate the debugging information itself in the
5118 debug_info structure. */
5120 debug
.external_dnr
= NULL
;
5121 debug
.external_pdr
= NULL
;
5122 debug
.external_sym
= NULL
;
5123 debug
.external_opt
= NULL
;
5124 debug
.external_aux
= NULL
;
5126 debug
.ssext
= debug
.ssext_end
= NULL
;
5127 debug
.external_fdr
= NULL
;
5128 debug
.external_rfd
= NULL
;
5129 debug
.external_ext
= debug
.external_ext_end
= NULL
;
5131 mdebug_handle
= bfd_ecoff_debug_init (abfd
, &debug
, swap
, info
);
5132 if (mdebug_handle
== NULL
)
5141 static const char * const name
[] =
5143 ".text", ".init", ".fini", ".data",
5144 ".rodata", ".sdata", ".sbss", ".bss"
5146 static const int sc
[] = { scText
, scInit
, scFini
, scData
,
5147 scRData
, scSData
, scSBss
, scBss
};
5150 esym
.cobol_main
= 0;
5154 esym
.asym
.iss
= issNil
;
5155 esym
.asym
.st
= stLocal
;
5156 esym
.asym
.reserved
= 0;
5157 esym
.asym
.index
= indexNil
;
5158 for (i
= 0; i
< 8; i
++)
5160 esym
.asym
.sc
= sc
[i
];
5161 s
= bfd_get_section_by_name (abfd
, name
[i
]);
5164 esym
.asym
.value
= s
->vma
;
5165 last
= s
->vma
+ s
->size
;
5168 esym
.asym
.value
= last
;
5170 if (! bfd_ecoff_debug_one_external (abfd
, &debug
, swap
,
5176 for (p
= o
->map_head
.link_order
;
5177 p
!= (struct bfd_link_order
*) NULL
;
5180 asection
*input_section
;
5182 const struct ecoff_debug_swap
*input_swap
;
5183 struct ecoff_debug_info input_debug
;
5187 if (p
->type
!= bfd_indirect_link_order
)
5189 if (p
->type
== bfd_data_link_order
)
5194 input_section
= p
->u
.indirect
.section
;
5195 input_bfd
= input_section
->owner
;
5197 if (! is_alpha_elf (input_bfd
))
5198 /* I don't know what a non ALPHA ELF bfd would be
5199 doing with a .mdebug section, but I don't really
5200 want to deal with it. */
5203 input_swap
= (get_elf_backend_data (input_bfd
)
5204 ->elf_backend_ecoff_debug_swap
);
5206 BFD_ASSERT (p
->size
== input_section
->size
);
5208 /* The ECOFF linking code expects that we have already
5209 read in the debugging information and set up an
5210 ecoff_debug_info structure, so we do that now. */
5211 if (!elf64_alpha_read_ecoff_info (input_bfd
, input_section
,
5215 if (! (bfd_ecoff_debug_accumulate
5216 (mdebug_handle
, abfd
, &debug
, swap
, input_bfd
,
5217 &input_debug
, input_swap
, info
)))
5220 /* Loop through the external symbols. For each one with
5221 interesting information, try to find the symbol in
5222 the linker global hash table and save the information
5223 for the output external symbols. */
5224 eraw_src
= (char *) input_debug
.external_ext
;
5225 eraw_end
= (eraw_src
5226 + (input_debug
.symbolic_header
.iextMax
5227 * input_swap
->external_ext_size
));
5229 eraw_src
< eraw_end
;
5230 eraw_src
+= input_swap
->external_ext_size
)
5234 struct alpha_elf_link_hash_entry
*h
;
5236 (*input_swap
->swap_ext_in
) (input_bfd
, eraw_src
, &ext
);
5237 if (ext
.asym
.sc
== scNil
5238 || ext
.asym
.sc
== scUndefined
5239 || ext
.asym
.sc
== scSUndefined
)
5242 name
= input_debug
.ssext
+ ext
.asym
.iss
;
5243 h
= alpha_elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
5244 if (h
== NULL
|| h
->esym
.ifd
!= -2)
5250 < input_debug
.symbolic_header
.ifdMax
);
5251 ext
.ifd
= input_debug
.ifdmap
[ext
.ifd
];
5257 /* Free up the information we just read. */
5258 free (input_debug
.line
);
5259 free (input_debug
.external_dnr
);
5260 free (input_debug
.external_pdr
);
5261 free (input_debug
.external_sym
);
5262 free (input_debug
.external_opt
);
5263 free (input_debug
.external_aux
);
5264 free (input_debug
.ss
);
5265 free (input_debug
.ssext
);
5266 free (input_debug
.external_fdr
);
5267 free (input_debug
.external_rfd
);
5268 free (input_debug
.external_ext
);
5270 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5271 elf_link_input_bfd ignores this section. */
5272 input_section
->flags
&=~ SEC_HAS_CONTENTS
;
5275 /* Build the external symbol information. */
5278 einfo
.debug
= &debug
;
5280 einfo
.failed
= FALSE
;
5281 elf_link_hash_traverse (elf_hash_table (info
),
5282 elf64_alpha_output_extsym
,
5287 /* Set the size of the .mdebug section. */
5288 o
->size
= bfd_ecoff_debug_size (abfd
, &debug
, swap
);
5290 /* Skip this section later on (I don't think this currently
5291 matters, but someday it might). */
5292 o
->map_head
.link_order
= (struct bfd_link_order
*) NULL
;
5298 /* Invoke the regular ELF backend linker to do all the work. */
5299 if (! bfd_elf_final_link (abfd
, info
))
5302 /* Now write out the computed sections. */
5304 /* The .got subsections... */
5306 bfd
*i
, *dynobj
= elf_hash_table(info
)->dynobj
;
5307 for (i
= htab
->got_list
;
5309 i
= alpha_elf_tdata(i
)->got_link_next
)
5313 /* elf_bfd_final_link already did everything in dynobj. */
5317 sgot
= alpha_elf_tdata(i
)->got
;
5318 if (! bfd_set_section_contents (abfd
, sgot
->output_section
,
5320 (file_ptr
) sgot
->output_offset
,
5326 if (mdebug_sec
!= (asection
*) NULL
)
5328 BFD_ASSERT (abfd
->output_has_begun
);
5329 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle
, abfd
, &debug
,
5331 mdebug_sec
->filepos
))
5334 bfd_ecoff_debug_free (mdebug_handle
, abfd
, &debug
, swap
, info
);
5340 static enum elf_reloc_type_class
5341 elf64_alpha_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5342 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5343 const Elf_Internal_Rela
*rela
)
5345 switch ((int) ELF64_R_TYPE (rela
->r_info
))
5347 case R_ALPHA_RELATIVE
:
5348 return reloc_class_relative
;
5349 case R_ALPHA_JMP_SLOT
:
5350 return reloc_class_plt
;
5352 return reloc_class_copy
;
5354 return reloc_class_normal
;
5358 static const struct bfd_elf_special_section elf64_alpha_special_sections
[] =
5360 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5361 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5362 { NULL
, 0, 0, 0, 0 }
5365 /* ECOFF swapping routines. These are used when dealing with the
5366 .mdebug section, which is in the ECOFF debugging format. Copied
5367 from elf32-mips.c. */
5368 static const struct ecoff_debug_swap
5369 elf64_alpha_ecoff_debug_swap
=
5371 /* Symbol table magic number. */
5373 /* Alignment of debugging information. E.g., 4. */
5375 /* Sizes of external symbolic information. */
5376 sizeof (struct hdr_ext
),
5377 sizeof (struct dnr_ext
),
5378 sizeof (struct pdr_ext
),
5379 sizeof (struct sym_ext
),
5380 sizeof (struct opt_ext
),
5381 sizeof (struct fdr_ext
),
5382 sizeof (struct rfd_ext
),
5383 sizeof (struct ext_ext
),
5384 /* Functions to swap in external symbolic data. */
5393 _bfd_ecoff_swap_tir_in
,
5394 _bfd_ecoff_swap_rndx_in
,
5395 /* Functions to swap out external symbolic data. */
5404 _bfd_ecoff_swap_tir_out
,
5405 _bfd_ecoff_swap_rndx_out
,
5406 /* Function to read in symbolic data. */
5407 elf64_alpha_read_ecoff_info
5410 /* Use a non-standard hash bucket size of 8. */
5412 static const struct elf_size_info alpha_elf_size_info
=
5414 sizeof (Elf64_External_Ehdr
),
5415 sizeof (Elf64_External_Phdr
),
5416 sizeof (Elf64_External_Shdr
),
5417 sizeof (Elf64_External_Rel
),
5418 sizeof (Elf64_External_Rela
),
5419 sizeof (Elf64_External_Sym
),
5420 sizeof (Elf64_External_Dyn
),
5421 sizeof (Elf_External_Note
),
5425 ELFCLASS64
, EV_CURRENT
,
5426 bfd_elf64_write_out_phdrs
,
5427 bfd_elf64_write_shdrs_and_ehdr
,
5428 bfd_elf64_checksum_contents
,
5429 bfd_elf64_write_relocs
,
5430 bfd_elf64_swap_symbol_in
,
5431 bfd_elf64_swap_symbol_out
,
5432 bfd_elf64_slurp_reloc_table
,
5433 bfd_elf64_slurp_symbol_table
,
5434 bfd_elf64_swap_dyn_in
,
5435 bfd_elf64_swap_dyn_out
,
5436 bfd_elf64_swap_reloc_in
,
5437 bfd_elf64_swap_reloc_out
,
5438 bfd_elf64_swap_reloca_in
,
5439 bfd_elf64_swap_reloca_out
5442 #define TARGET_LITTLE_SYM alpha_elf64_vec
5443 #define TARGET_LITTLE_NAME "elf64-alpha"
5444 #define ELF_ARCH bfd_arch_alpha
5445 #define ELF_TARGET_ID ALPHA_ELF_DATA
5446 #define ELF_MACHINE_CODE EM_ALPHA
5447 #define ELF_MAXPAGESIZE 0x10000
5448 #define ELF_COMMONPAGESIZE 0x2000
5450 #define bfd_elf64_bfd_link_hash_table_create \
5451 elf64_alpha_bfd_link_hash_table_create
5453 #define bfd_elf64_bfd_reloc_type_lookup \
5454 elf64_alpha_bfd_reloc_type_lookup
5455 #define bfd_elf64_bfd_reloc_name_lookup \
5456 elf64_alpha_bfd_reloc_name_lookup
5457 #define elf_info_to_howto \
5458 elf64_alpha_info_to_howto
5460 #define bfd_elf64_mkobject \
5461 elf64_alpha_mkobject
5462 #define elf_backend_object_p \
5463 elf64_alpha_object_p
5465 #define elf_backend_section_from_shdr \
5466 elf64_alpha_section_from_shdr
5467 #define elf_backend_section_flags \
5468 elf64_alpha_section_flags
5469 #define elf_backend_fake_sections \
5470 elf64_alpha_fake_sections
5472 #define bfd_elf64_bfd_is_local_label_name \
5473 elf64_alpha_is_local_label_name
5474 #define bfd_elf64_find_nearest_line \
5475 elf64_alpha_find_nearest_line
5476 #define bfd_elf64_bfd_relax_section \
5477 elf64_alpha_relax_section
5479 #define elf_backend_add_symbol_hook \
5480 elf64_alpha_add_symbol_hook
5481 #define elf_backend_relocs_compatible \
5482 _bfd_elf_relocs_compatible
5483 #define elf_backend_sort_relocs_p \
5484 elf64_alpha_sort_relocs_p
5485 #define elf_backend_check_relocs \
5486 elf64_alpha_check_relocs
5487 #define elf_backend_create_dynamic_sections \
5488 elf64_alpha_create_dynamic_sections
5489 #define elf_backend_adjust_dynamic_symbol \
5490 elf64_alpha_adjust_dynamic_symbol
5491 #define elf_backend_merge_symbol_attribute \
5492 elf64_alpha_merge_symbol_attribute
5493 #define elf_backend_copy_indirect_symbol \
5494 elf64_alpha_copy_indirect_symbol
5495 #define elf_backend_always_size_sections \
5496 elf64_alpha_always_size_sections
5497 #define elf_backend_size_dynamic_sections \
5498 elf64_alpha_size_dynamic_sections
5499 #define elf_backend_omit_section_dynsym \
5500 _bfd_elf_omit_section_dynsym_all
5501 #define elf_backend_relocate_section \
5502 elf64_alpha_relocate_section
5503 #define elf_backend_finish_dynamic_symbol \
5504 elf64_alpha_finish_dynamic_symbol
5505 #define elf_backend_finish_dynamic_sections \
5506 elf64_alpha_finish_dynamic_sections
5507 #define bfd_elf64_bfd_final_link \
5508 elf64_alpha_final_link
5509 #define elf_backend_reloc_type_class \
5510 elf64_alpha_reloc_type_class
5512 #define elf_backend_can_gc_sections 1
5513 #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
5515 #define elf_backend_ecoff_debug_swap \
5516 &elf64_alpha_ecoff_debug_swap
5518 #define elf_backend_size_info \
5521 #define elf_backend_special_sections \
5522 elf64_alpha_special_sections
5524 /* A few constants that determine how the .plt section is set up. */
5525 #define elf_backend_want_got_plt 0
5526 #define elf_backend_plt_readonly 0
5527 #define elf_backend_want_plt_sym 1
5528 #define elf_backend_got_header_size 0
5529 #define elf_backend_dtrel_excludes_plt 1
5531 #include "elf64-target.h"
5533 /* FreeBSD support. */
5535 #undef TARGET_LITTLE_SYM
5536 #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
5537 #undef TARGET_LITTLE_NAME
5538 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5540 #define ELF_OSABI ELFOSABI_FREEBSD
5542 /* The kernel recognizes executables as valid only if they carry a
5543 "FreeBSD" label in the ELF header. So we put this label on all
5544 executables and (for simplicity) also all other object files. */
5547 elf64_alpha_fbsd_post_process_headers (bfd
* abfd
,
5548 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
5550 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
5552 i_ehdrp
= elf_elfheader (abfd
);
5554 /* Put an ABI label supported by FreeBSD >= 4.1. */
5555 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
5556 #ifdef OLD_FREEBSD_ABI_LABEL
5557 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5558 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5562 #undef elf_backend_post_process_headers
5563 #define elf_backend_post_process_headers \
5564 elf64_alpha_fbsd_post_process_headers
5567 #define elf64_bed elf64_alpha_fbsd_bed
5569 #include "elf64-target.h"