1 /* Alpha specific support for 64-bit ELF
2 Copyright (C) 1996-2020 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. */
30 #include "ecoff-bfd.h"
32 #include "elf/alpha.h"
36 #define NO_COFF_RELOCS
37 #define NO_COFF_SYMBOLS
38 #define NO_COFF_LINENOS
40 /* Get the ECOFF swapping routines. Needed for the debug information. */
41 #include "coff/internal.h"
43 #include "coff/symconst.h"
44 #include "coff/ecoff.h"
45 #include "coff/alpha.h"
50 #include "ecoffswap.h"
53 /* Instruction data for plt generation and relaxation. */
61 #define INSN_LDA (OP_LDA << 26)
62 #define INSN_LDAH (OP_LDAH << 26)
63 #define INSN_LDQ (OP_LDQ << 26)
64 #define INSN_BR (OP_BR << 26)
66 #define INSN_ADDQ 0x40000400
67 #define INSN_RDUNIQ 0x0000009e
68 #define INSN_SUBQ 0x40000520
69 #define INSN_S4SUBQ 0x40000560
70 #define INSN_UNOP 0x2ffe0000
72 #define INSN_JSR 0x68004000
73 #define INSN_JMP 0x68000000
74 #define INSN_JSR_MASK 0xfc00c000
76 #define INSN_A(I,A) (I | (A << 21))
77 #define INSN_AB(I,A,B) (I | (A << 21) | (B << 16))
78 #define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C)
79 #define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff))
80 #define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff))
84 /* Set by ld emulation. Putting this into the link_info or hash structure
85 is simply working too hard. */
87 bfd_boolean elf64_alpha_use_secureplt
= TRUE
;
89 bfd_boolean elf64_alpha_use_secureplt
= FALSE
;
92 #define OLD_PLT_HEADER_SIZE 32
93 #define OLD_PLT_ENTRY_SIZE 12
94 #define NEW_PLT_HEADER_SIZE 36
95 #define NEW_PLT_ENTRY_SIZE 4
97 #define PLT_HEADER_SIZE \
98 (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
99 #define PLT_ENTRY_SIZE \
100 (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
102 #define MAX_GOT_SIZE (64*1024)
104 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
107 /* Used to implement multiple .got subsections. */
108 struct alpha_elf_got_entry
110 struct alpha_elf_got_entry
*next
;
112 /* Which .got subsection? */
115 /* The addend in effect for this entry. */
118 /* The .got offset for this entry. */
121 /* The .plt offset for this entry. */
124 /* How many references to this entry? */
127 /* The relocation type of this entry. */
128 unsigned char reloc_type
;
130 /* How a LITERAL is used. */
133 /* Have we initialized the dynamic relocation for this entry? */
134 unsigned char reloc_done
;
136 /* Have we adjusted this entry for SEC_MERGE? */
137 unsigned char reloc_xlated
;
140 struct alpha_elf_reloc_entry
142 struct alpha_elf_reloc_entry
*next
;
144 /* Which .reloc section? */
147 /* Which section this relocation is against? */
150 /* How many did we find? */
153 /* What kind of relocation? */
157 struct alpha_elf_link_hash_entry
159 struct elf_link_hash_entry root
;
161 /* External symbol information. */
164 /* Cumulative flags for all the .got entries. */
167 /* Contexts in which a literal was referenced. */
168 #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
169 #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
170 #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
171 #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
172 #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
173 #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
174 #define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
175 #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
176 #define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
178 /* Used to implement multiple .got subsections. */
179 struct alpha_elf_got_entry
*got_entries
;
181 /* Used to count non-got, non-plt relocations for delayed sizing
182 of relocation sections. */
183 struct alpha_elf_reloc_entry
*reloc_entries
;
186 /* Alpha ELF linker hash table. */
188 struct alpha_elf_link_hash_table
190 struct elf_link_hash_table root
;
192 /* The head of a list of .got subsections linked through
193 alpha_elf_tdata(abfd)->got_link_next. */
196 /* The most recent relax pass that we've seen. The GOTs
197 should be regenerated if this doesn't match. */
201 /* Look up an entry in a Alpha ELF linker hash table. */
203 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
204 ((struct alpha_elf_link_hash_entry *) \
205 elf_link_hash_lookup (&(table)->root, (string), (create), \
208 /* Traverse a Alpha ELF linker hash table. */
210 #define alpha_elf_link_hash_traverse(table, func, info) \
211 (elf_link_hash_traverse \
213 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
216 /* Get the Alpha ELF linker hash table from a link_info structure. */
218 #define alpha_elf_hash_table(p) \
219 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
220 == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL)
222 /* Get the object's symbols as our own entry type. */
224 #define alpha_elf_sym_hashes(abfd) \
225 ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
227 /* Should we do dynamic things to this symbol? This differs from the
228 generic version in that we never need to consider function pointer
229 equality wrt PLT entries -- we don't create a PLT entry if a symbol's
230 address is ever taken. */
232 static inline bfd_boolean
233 alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
234 struct bfd_link_info
*info
)
236 return _bfd_elf_dynamic_symbol_p (h
, info
, 0);
239 /* Create an entry in a Alpha ELF linker hash table. */
241 static struct bfd_hash_entry
*
242 elf64_alpha_link_hash_newfunc (struct bfd_hash_entry
*entry
,
243 struct bfd_hash_table
*table
,
246 struct alpha_elf_link_hash_entry
*ret
=
247 (struct alpha_elf_link_hash_entry
*) entry
;
249 /* Allocate the structure if it has not already been allocated by a
251 if (ret
== (struct alpha_elf_link_hash_entry
*) NULL
)
252 ret
= ((struct alpha_elf_link_hash_entry
*)
253 bfd_hash_allocate (table
,
254 sizeof (struct alpha_elf_link_hash_entry
)));
255 if (ret
== (struct alpha_elf_link_hash_entry
*) NULL
)
256 return (struct bfd_hash_entry
*) ret
;
258 /* Call the allocation method of the superclass. */
259 ret
= ((struct alpha_elf_link_hash_entry
*)
260 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
262 if (ret
!= (struct alpha_elf_link_hash_entry
*) NULL
)
264 /* Set local fields. */
265 memset (&ret
->esym
, 0, sizeof (EXTR
));
266 /* We use -2 as a marker to indicate that the information has
267 not been set. -1 means there is no associated ifd. */
270 ret
->got_entries
= NULL
;
271 ret
->reloc_entries
= NULL
;
274 return (struct bfd_hash_entry
*) ret
;
277 /* Create a Alpha ELF linker hash table. */
279 static struct bfd_link_hash_table
*
280 elf64_alpha_bfd_link_hash_table_create (bfd
*abfd
)
282 struct alpha_elf_link_hash_table
*ret
;
283 size_t amt
= sizeof (struct alpha_elf_link_hash_table
);
285 ret
= (struct alpha_elf_link_hash_table
*) bfd_zmalloc (amt
);
286 if (ret
== (struct alpha_elf_link_hash_table
*) NULL
)
289 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
290 elf64_alpha_link_hash_newfunc
,
291 sizeof (struct alpha_elf_link_hash_entry
),
298 return &ret
->root
.root
;
301 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
302 routine in order to handle the ECOFF debugging information. */
304 struct alpha_elf_find_line
306 struct ecoff_debug_info d
;
307 struct ecoff_find_line i
;
310 /* We have some private fields hanging off of the elf_tdata structure. */
312 struct alpha_elf_obj_tdata
314 struct elf_obj_tdata root
;
316 /* For every input file, these are the got entries for that object's
318 struct alpha_elf_got_entry
** local_got_entries
;
320 /* For every input file, this is the object that owns the got that
321 this input file uses. */
324 /* For every got, this is a linked list through the objects using this got */
325 bfd
*in_got_link_next
;
327 /* For every got, this is a link to the next got subsegment. */
330 /* For every got, this is the section. */
333 /* For every got, this is it's total number of words. */
336 /* For every got, this is the sum of the number of words required
337 to hold all of the member object's local got. */
340 /* Used by elf64_alpha_find_nearest_line entry point. */
341 struct alpha_elf_find_line
*find_line_info
;
345 #define alpha_elf_tdata(abfd) \
346 ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
348 #define is_alpha_elf(bfd) \
349 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
350 && elf_tdata (bfd) != NULL \
351 && elf_object_id (bfd) == ALPHA_ELF_DATA)
354 elf64_alpha_mkobject (bfd
*abfd
)
356 return bfd_elf_allocate_object (abfd
, sizeof (struct alpha_elf_obj_tdata
),
361 elf64_alpha_object_p (bfd
*abfd
)
363 /* Set the right machine number for an Alpha ELF file. */
364 return bfd_default_set_arch_mach (abfd
, bfd_arch_alpha
, 0);
367 /* A relocation function which doesn't do anything. */
369 static bfd_reloc_status_type
370 elf64_alpha_reloc_nil (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*reloc
,
371 asymbol
*sym ATTRIBUTE_UNUSED
,
372 void * data ATTRIBUTE_UNUSED
, asection
*sec
,
373 bfd
*output_bfd
, char **error_message ATTRIBUTE_UNUSED
)
376 reloc
->address
+= sec
->output_offset
;
380 /* A relocation function used for an unsupported reloc. */
382 static bfd_reloc_status_type
383 elf64_alpha_reloc_bad (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*reloc
,
384 asymbol
*sym ATTRIBUTE_UNUSED
,
385 void * data ATTRIBUTE_UNUSED
, asection
*sec
,
386 bfd
*output_bfd
, char **error_message ATTRIBUTE_UNUSED
)
389 reloc
->address
+= sec
->output_offset
;
390 return bfd_reloc_notsupported
;
393 /* Do the work of the GPDISP relocation. */
395 static bfd_reloc_status_type
396 elf64_alpha_do_reloc_gpdisp (bfd
*abfd
, bfd_vma gpdisp
, bfd_byte
*p_ldah
,
399 bfd_reloc_status_type ret
= bfd_reloc_ok
;
401 unsigned long i_ldah
, i_lda
;
403 i_ldah
= bfd_get_32 (abfd
, p_ldah
);
404 i_lda
= bfd_get_32 (abfd
, p_lda
);
406 /* Complain if the instructions are not correct. */
407 if (((i_ldah
>> 26) & 0x3f) != 0x09
408 || ((i_lda
>> 26) & 0x3f) != 0x08)
409 ret
= bfd_reloc_dangerous
;
411 /* Extract the user-supplied offset, mirroring the sign extensions
412 that the instructions perform. */
413 addend
= ((i_ldah
& 0xffff) << 16) | (i_lda
& 0xffff);
414 addend
= (addend
^ 0x80008000) - 0x80008000;
418 if ((bfd_signed_vma
) gpdisp
< -(bfd_signed_vma
) 0x80000000
419 || (bfd_signed_vma
) gpdisp
>= (bfd_signed_vma
) 0x7fff8000)
420 ret
= bfd_reloc_overflow
;
422 /* compensate for the sign extension again. */
423 i_ldah
= ((i_ldah
& 0xffff0000)
424 | (((gpdisp
>> 16) + ((gpdisp
>> 15) & 1)) & 0xffff));
425 i_lda
= (i_lda
& 0xffff0000) | (gpdisp
& 0xffff);
427 bfd_put_32 (abfd
, (bfd_vma
) i_ldah
, p_ldah
);
428 bfd_put_32 (abfd
, (bfd_vma
) i_lda
, p_lda
);
433 /* The special function for the GPDISP reloc. */
435 static bfd_reloc_status_type
436 elf64_alpha_reloc_gpdisp (bfd
*abfd
, arelent
*reloc_entry
,
437 asymbol
*sym ATTRIBUTE_UNUSED
, void * data
,
438 asection
*input_section
, bfd
*output_bfd
,
441 bfd_reloc_status_type ret
;
442 bfd_vma gp
, relocation
;
443 bfd_vma high_address
;
444 bfd_byte
*p_ldah
, *p_lda
;
446 /* Don't do anything if we're not doing a final link. */
449 reloc_entry
->address
+= input_section
->output_offset
;
453 high_address
= bfd_get_section_limit (abfd
, input_section
);
454 if (reloc_entry
->address
> high_address
455 || reloc_entry
->address
+ reloc_entry
->addend
> high_address
)
456 return bfd_reloc_outofrange
;
458 /* The gp used in the portion of the output object to which this
459 input object belongs is cached on the input bfd. */
460 gp
= _bfd_get_gp_value (abfd
);
462 relocation
= (input_section
->output_section
->vma
463 + input_section
->output_offset
464 + reloc_entry
->address
);
466 p_ldah
= (bfd_byte
*) data
+ reloc_entry
->address
;
467 p_lda
= p_ldah
+ reloc_entry
->addend
;
469 ret
= elf64_alpha_do_reloc_gpdisp (abfd
, gp
- relocation
, p_ldah
, p_lda
);
471 /* Complain if the instructions are not correct. */
472 if (ret
== bfd_reloc_dangerous
)
473 *err_msg
= _("GPDISP relocation did not find ldah and lda instructions");
478 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
479 from smaller values. Start with zero, widen, *then* decrement. */
480 #define MINUS_ONE (((bfd_vma)0) - 1)
483 #define SKIP_HOWTO(N) \
484 HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
486 static reloc_howto_type elf64_alpha_howto_table
[] =
488 HOWTO (R_ALPHA_NONE
, /* type */
490 3, /* size (0 = byte, 1 = short, 2 = long) */
492 TRUE
, /* pc_relative */
494 complain_overflow_dont
, /* complain_on_overflow */
495 elf64_alpha_reloc_nil
, /* special_function */
497 FALSE
, /* partial_inplace */
500 TRUE
), /* pcrel_offset */
502 /* A 32 bit reference to a symbol. */
503 HOWTO (R_ALPHA_REFLONG
, /* type */
505 2, /* size (0 = byte, 1 = short, 2 = long) */
507 FALSE
, /* pc_relative */
509 complain_overflow_bitfield
, /* complain_on_overflow */
510 bfd_elf_generic_reloc
, /* special_function */
511 "REFLONG", /* name */
512 FALSE
, /* partial_inplace */
513 0xffffffff, /* src_mask */
514 0xffffffff, /* dst_mask */
515 FALSE
), /* pcrel_offset */
517 /* A 64 bit reference to a symbol. */
518 HOWTO (R_ALPHA_REFQUAD
, /* type */
520 4, /* size (0 = byte, 1 = short, 2 = long) */
522 FALSE
, /* pc_relative */
524 complain_overflow_bitfield
, /* complain_on_overflow */
525 bfd_elf_generic_reloc
, /* special_function */
526 "REFQUAD", /* name */
527 FALSE
, /* partial_inplace */
528 MINUS_ONE
, /* src_mask */
529 MINUS_ONE
, /* dst_mask */
530 FALSE
), /* pcrel_offset */
532 /* A 32 bit GP relative offset. This is just like REFLONG except
533 that when the value is used the value of the gp register will be
535 HOWTO (R_ALPHA_GPREL32
, /* type */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
539 FALSE
, /* pc_relative */
541 complain_overflow_bitfield
, /* complain_on_overflow */
542 bfd_elf_generic_reloc
, /* special_function */
543 "GPREL32", /* name */
544 FALSE
, /* partial_inplace */
545 0xffffffff, /* src_mask */
546 0xffffffff, /* dst_mask */
547 FALSE
), /* pcrel_offset */
549 /* Used for an instruction that refers to memory off the GP register. */
550 HOWTO (R_ALPHA_LITERAL
, /* type */
552 1, /* size (0 = byte, 1 = short, 2 = long) */
554 FALSE
, /* pc_relative */
556 complain_overflow_signed
, /* complain_on_overflow */
557 bfd_elf_generic_reloc
, /* special_function */
558 "ELF_LITERAL", /* name */
559 FALSE
, /* partial_inplace */
560 0xffff, /* src_mask */
561 0xffff, /* dst_mask */
562 FALSE
), /* pcrel_offset */
564 /* This reloc only appears immediately following an ELF_LITERAL reloc.
565 It identifies a use of the literal. The symbol index is special:
566 1 means the literal address is in the base register of a memory
567 format instruction; 2 means the literal address is in the byte
568 offset register of a byte-manipulation instruction; 3 means the
569 literal address is in the target register of a jsr instruction.
570 This does not actually do any relocation. */
571 HOWTO (R_ALPHA_LITUSE
, /* type */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
575 FALSE
, /* pc_relative */
577 complain_overflow_dont
, /* complain_on_overflow */
578 elf64_alpha_reloc_nil
, /* special_function */
580 FALSE
, /* partial_inplace */
583 FALSE
), /* pcrel_offset */
585 /* Load the gp register. This is always used for a ldah instruction
586 which loads the upper 16 bits of the gp register. The symbol
587 index of the GPDISP instruction is an offset in bytes to the lda
588 instruction that loads the lower 16 bits. The value to use for
589 the relocation is the difference between the GP value and the
590 current location; the load will always be done against a register
591 holding the current address.
593 NOTE: Unlike ECOFF, partial in-place relocation is not done. If
594 any offset is present in the instructions, it is an offset from
595 the register to the ldah instruction. This lets us avoid any
596 stupid hackery like inventing a gp value to do partial relocation
597 against. Also unlike ECOFF, we do the whole relocation off of
598 the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
599 space consuming bit, that, since all the information was present
600 in the GPDISP_HI16 reloc. */
601 HOWTO (R_ALPHA_GPDISP
, /* type */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
605 FALSE
, /* pc_relative */
607 complain_overflow_dont
, /* complain_on_overflow */
608 elf64_alpha_reloc_gpdisp
, /* special_function */
610 FALSE
, /* partial_inplace */
611 0xffff, /* src_mask */
612 0xffff, /* dst_mask */
613 TRUE
), /* pcrel_offset */
615 /* A 21 bit branch. */
616 HOWTO (R_ALPHA_BRADDR
, /* type */
618 2, /* size (0 = byte, 1 = short, 2 = long) */
620 TRUE
, /* pc_relative */
622 complain_overflow_signed
, /* complain_on_overflow */
623 bfd_elf_generic_reloc
, /* special_function */
625 FALSE
, /* partial_inplace */
626 0x1fffff, /* src_mask */
627 0x1fffff, /* dst_mask */
628 TRUE
), /* pcrel_offset */
630 /* A hint for a jump to a register. */
631 HOWTO (R_ALPHA_HINT
, /* type */
633 1, /* size (0 = byte, 1 = short, 2 = long) */
635 TRUE
, /* pc_relative */
637 complain_overflow_dont
, /* complain_on_overflow */
638 bfd_elf_generic_reloc
, /* special_function */
640 FALSE
, /* partial_inplace */
641 0x3fff, /* src_mask */
642 0x3fff, /* dst_mask */
643 TRUE
), /* pcrel_offset */
645 /* 16 bit PC relative offset. */
646 HOWTO (R_ALPHA_SREL16
, /* type */
648 1, /* size (0 = byte, 1 = short, 2 = long) */
650 TRUE
, /* pc_relative */
652 complain_overflow_signed
, /* complain_on_overflow */
653 bfd_elf_generic_reloc
, /* special_function */
655 FALSE
, /* partial_inplace */
656 0xffff, /* src_mask */
657 0xffff, /* dst_mask */
658 TRUE
), /* pcrel_offset */
660 /* 32 bit PC relative offset. */
661 HOWTO (R_ALPHA_SREL32
, /* type */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
665 TRUE
, /* pc_relative */
667 complain_overflow_signed
, /* complain_on_overflow */
668 bfd_elf_generic_reloc
, /* special_function */
670 FALSE
, /* partial_inplace */
671 0xffffffff, /* src_mask */
672 0xffffffff, /* dst_mask */
673 TRUE
), /* pcrel_offset */
675 /* A 64 bit PC relative offset. */
676 HOWTO (R_ALPHA_SREL64
, /* type */
678 4, /* size (0 = byte, 1 = short, 2 = long) */
680 TRUE
, /* pc_relative */
682 complain_overflow_signed
, /* complain_on_overflow */
683 bfd_elf_generic_reloc
, /* special_function */
685 FALSE
, /* partial_inplace */
686 MINUS_ONE
, /* src_mask */
687 MINUS_ONE
, /* dst_mask */
688 TRUE
), /* pcrel_offset */
690 /* Skip 12 - 16; deprecated ECOFF relocs. */
697 /* The high 16 bits of the displacement from GP to the target. */
698 HOWTO (R_ALPHA_GPRELHIGH
,
700 1, /* size (0 = byte, 1 = short, 2 = long) */
702 FALSE
, /* pc_relative */
704 complain_overflow_signed
, /* complain_on_overflow */
705 bfd_elf_generic_reloc
, /* special_function */
706 "GPRELHIGH", /* name */
707 FALSE
, /* partial_inplace */
708 0xffff, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE
), /* pcrel_offset */
712 /* The low 16 bits of the displacement from GP to the target. */
713 HOWTO (R_ALPHA_GPRELLOW
,
715 1, /* size (0 = byte, 1 = short, 2 = long) */
717 FALSE
, /* pc_relative */
719 complain_overflow_dont
, /* complain_on_overflow */
720 bfd_elf_generic_reloc
, /* special_function */
721 "GPRELLOW", /* name */
722 FALSE
, /* partial_inplace */
723 0xffff, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE
), /* pcrel_offset */
727 /* A 16-bit displacement from the GP to the target. */
728 HOWTO (R_ALPHA_GPREL16
,
730 1, /* size (0 = byte, 1 = short, 2 = long) */
732 FALSE
, /* pc_relative */
734 complain_overflow_signed
, /* complain_on_overflow */
735 bfd_elf_generic_reloc
, /* special_function */
736 "GPREL16", /* name */
737 FALSE
, /* partial_inplace */
738 0xffff, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE
), /* pcrel_offset */
742 /* Skip 20 - 23; deprecated ECOFF relocs. */
748 /* Misc ELF relocations. */
750 /* A dynamic relocation to copy the target into our .dynbss section. */
751 /* Not generated, as all Alpha objects use PIC, so it is not needed. It
752 is present because every other ELF has one, but should not be used
753 because .dynbss is an ugly thing. */
760 complain_overflow_dont
,
761 bfd_elf_generic_reloc
,
768 /* A dynamic relocation for a .got entry. */
769 HOWTO (R_ALPHA_GLOB_DAT
,
775 complain_overflow_dont
,
776 bfd_elf_generic_reloc
,
783 /* A dynamic relocation for a .plt entry. */
784 HOWTO (R_ALPHA_JMP_SLOT
,
790 complain_overflow_dont
,
791 bfd_elf_generic_reloc
,
798 /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
799 HOWTO (R_ALPHA_RELATIVE
,
805 complain_overflow_dont
,
806 bfd_elf_generic_reloc
,
813 /* A 21 bit branch that adjusts for gp loads. */
814 HOWTO (R_ALPHA_BRSGP
, /* type */
816 2, /* size (0 = byte, 1 = short, 2 = long) */
818 TRUE
, /* pc_relative */
820 complain_overflow_signed
, /* complain_on_overflow */
821 bfd_elf_generic_reloc
, /* special_function */
823 FALSE
, /* partial_inplace */
824 0x1fffff, /* src_mask */
825 0x1fffff, /* dst_mask */
826 TRUE
), /* pcrel_offset */
828 /* Creates a tls_index for the symbol in the got. */
829 HOWTO (R_ALPHA_TLSGD
, /* type */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
833 FALSE
, /* pc_relative */
835 complain_overflow_signed
, /* complain_on_overflow */
836 bfd_elf_generic_reloc
, /* special_function */
838 FALSE
, /* partial_inplace */
839 0xffff, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE
), /* pcrel_offset */
843 /* Creates a tls_index for the (current) module in the got. */
844 HOWTO (R_ALPHA_TLSLDM
, /* type */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
848 FALSE
, /* pc_relative */
850 complain_overflow_signed
, /* complain_on_overflow */
851 bfd_elf_generic_reloc
, /* special_function */
853 FALSE
, /* partial_inplace */
854 0xffff, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE
), /* pcrel_offset */
858 /* A dynamic relocation for a DTP module entry. */
859 HOWTO (R_ALPHA_DTPMOD64
, /* type */
861 4, /* size (0 = byte, 1 = short, 2 = long) */
863 FALSE
, /* pc_relative */
865 complain_overflow_bitfield
, /* complain_on_overflow */
866 bfd_elf_generic_reloc
, /* special_function */
867 "DTPMOD64", /* name */
868 FALSE
, /* partial_inplace */
869 MINUS_ONE
, /* src_mask */
870 MINUS_ONE
, /* dst_mask */
871 FALSE
), /* pcrel_offset */
873 /* Creates a 64-bit offset in the got for the displacement
874 from DTP to the target. */
875 HOWTO (R_ALPHA_GOTDTPREL
, /* type */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
879 FALSE
, /* pc_relative */
881 complain_overflow_signed
, /* complain_on_overflow */
882 bfd_elf_generic_reloc
, /* special_function */
883 "GOTDTPREL", /* name */
884 FALSE
, /* partial_inplace */
885 0xffff, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE
), /* pcrel_offset */
889 /* A dynamic relocation for a displacement from DTP to the target. */
890 HOWTO (R_ALPHA_DTPREL64
, /* type */
892 4, /* size (0 = byte, 1 = short, 2 = long) */
894 FALSE
, /* pc_relative */
896 complain_overflow_bitfield
, /* complain_on_overflow */
897 bfd_elf_generic_reloc
, /* special_function */
898 "DTPREL64", /* name */
899 FALSE
, /* partial_inplace */
900 MINUS_ONE
, /* src_mask */
901 MINUS_ONE
, /* dst_mask */
902 FALSE
), /* pcrel_offset */
904 /* The high 16 bits of the displacement from DTP to the target. */
905 HOWTO (R_ALPHA_DTPRELHI
, /* type */
907 1, /* size (0 = byte, 1 = short, 2 = long) */
909 FALSE
, /* pc_relative */
911 complain_overflow_signed
, /* complain_on_overflow */
912 bfd_elf_generic_reloc
, /* special_function */
913 "DTPRELHI", /* name */
914 FALSE
, /* partial_inplace */
915 0xffff, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE
), /* pcrel_offset */
919 /* The low 16 bits of the displacement from DTP to the target. */
920 HOWTO (R_ALPHA_DTPRELLO
, /* type */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
924 FALSE
, /* pc_relative */
926 complain_overflow_dont
, /* complain_on_overflow */
927 bfd_elf_generic_reloc
, /* special_function */
928 "DTPRELLO", /* name */
929 FALSE
, /* partial_inplace */
930 0xffff, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE
), /* pcrel_offset */
934 /* A 16-bit displacement from DTP to the target. */
935 HOWTO (R_ALPHA_DTPREL16
, /* type */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
939 FALSE
, /* pc_relative */
941 complain_overflow_signed
, /* complain_on_overflow */
942 bfd_elf_generic_reloc
, /* special_function */
943 "DTPREL16", /* name */
944 FALSE
, /* partial_inplace */
945 0xffff, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE
), /* pcrel_offset */
949 /* Creates a 64-bit offset in the got for the displacement
950 from TP to the target. */
951 HOWTO (R_ALPHA_GOTTPREL
, /* type */
953 1, /* size (0 = byte, 1 = short, 2 = long) */
955 FALSE
, /* pc_relative */
957 complain_overflow_signed
, /* complain_on_overflow */
958 bfd_elf_generic_reloc
, /* special_function */
959 "GOTTPREL", /* name */
960 FALSE
, /* partial_inplace */
961 0xffff, /* src_mask */
962 0xffff, /* dst_mask */
963 FALSE
), /* pcrel_offset */
965 /* A dynamic relocation for a displacement from TP to the target. */
966 HOWTO (R_ALPHA_TPREL64
, /* type */
968 4, /* size (0 = byte, 1 = short, 2 = long) */
970 FALSE
, /* pc_relative */
972 complain_overflow_bitfield
, /* complain_on_overflow */
973 bfd_elf_generic_reloc
, /* special_function */
974 "TPREL64", /* name */
975 FALSE
, /* partial_inplace */
976 MINUS_ONE
, /* src_mask */
977 MINUS_ONE
, /* dst_mask */
978 FALSE
), /* pcrel_offset */
980 /* The high 16 bits of the displacement from TP to the target. */
981 HOWTO (R_ALPHA_TPRELHI
, /* type */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
985 FALSE
, /* pc_relative */
987 complain_overflow_signed
, /* complain_on_overflow */
988 bfd_elf_generic_reloc
, /* special_function */
989 "TPRELHI", /* name */
990 FALSE
, /* partial_inplace */
991 0xffff, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE
), /* pcrel_offset */
995 /* The low 16 bits of the displacement from TP to the target. */
996 HOWTO (R_ALPHA_TPRELLO
, /* type */
998 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 FALSE
, /* pc_relative */
1002 complain_overflow_dont
, /* complain_on_overflow */
1003 bfd_elf_generic_reloc
, /* special_function */
1004 "TPRELLO", /* name */
1005 FALSE
, /* partial_inplace */
1006 0xffff, /* src_mask */
1007 0xffff, /* dst_mask */
1008 FALSE
), /* pcrel_offset */
1010 /* A 16-bit displacement from TP to the target. */
1011 HOWTO (R_ALPHA_TPREL16
, /* type */
1013 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 FALSE
, /* pc_relative */
1017 complain_overflow_signed
, /* complain_on_overflow */
1018 bfd_elf_generic_reloc
, /* special_function */
1019 "TPREL16", /* name */
1020 FALSE
, /* partial_inplace */
1021 0xffff, /* src_mask */
1022 0xffff, /* dst_mask */
1023 FALSE
), /* pcrel_offset */
1026 /* A mapping from BFD reloc types to Alpha ELF reloc types. */
1028 struct elf_reloc_map
1030 bfd_reloc_code_real_type bfd_reloc_val
;
1034 static const struct elf_reloc_map elf64_alpha_reloc_map
[] =
1036 {BFD_RELOC_NONE
, R_ALPHA_NONE
},
1037 {BFD_RELOC_32
, R_ALPHA_REFLONG
},
1038 {BFD_RELOC_64
, R_ALPHA_REFQUAD
},
1039 {BFD_RELOC_CTOR
, R_ALPHA_REFQUAD
},
1040 {BFD_RELOC_GPREL32
, R_ALPHA_GPREL32
},
1041 {BFD_RELOC_ALPHA_ELF_LITERAL
, R_ALPHA_LITERAL
},
1042 {BFD_RELOC_ALPHA_LITUSE
, R_ALPHA_LITUSE
},
1043 {BFD_RELOC_ALPHA_GPDISP
, R_ALPHA_GPDISP
},
1044 {BFD_RELOC_23_PCREL_S2
, R_ALPHA_BRADDR
},
1045 {BFD_RELOC_ALPHA_HINT
, R_ALPHA_HINT
},
1046 {BFD_RELOC_16_PCREL
, R_ALPHA_SREL16
},
1047 {BFD_RELOC_32_PCREL
, R_ALPHA_SREL32
},
1048 {BFD_RELOC_64_PCREL
, R_ALPHA_SREL64
},
1049 {BFD_RELOC_ALPHA_GPREL_HI16
, R_ALPHA_GPRELHIGH
},
1050 {BFD_RELOC_ALPHA_GPREL_LO16
, R_ALPHA_GPRELLOW
},
1051 {BFD_RELOC_GPREL16
, R_ALPHA_GPREL16
},
1052 {BFD_RELOC_ALPHA_BRSGP
, R_ALPHA_BRSGP
},
1053 {BFD_RELOC_ALPHA_TLSGD
, R_ALPHA_TLSGD
},
1054 {BFD_RELOC_ALPHA_TLSLDM
, R_ALPHA_TLSLDM
},
1055 {BFD_RELOC_ALPHA_DTPMOD64
, R_ALPHA_DTPMOD64
},
1056 {BFD_RELOC_ALPHA_GOTDTPREL16
, R_ALPHA_GOTDTPREL
},
1057 {BFD_RELOC_ALPHA_DTPREL64
, R_ALPHA_DTPREL64
},
1058 {BFD_RELOC_ALPHA_DTPREL_HI16
, R_ALPHA_DTPRELHI
},
1059 {BFD_RELOC_ALPHA_DTPREL_LO16
, R_ALPHA_DTPRELLO
},
1060 {BFD_RELOC_ALPHA_DTPREL16
, R_ALPHA_DTPREL16
},
1061 {BFD_RELOC_ALPHA_GOTTPREL16
, R_ALPHA_GOTTPREL
},
1062 {BFD_RELOC_ALPHA_TPREL64
, R_ALPHA_TPREL64
},
1063 {BFD_RELOC_ALPHA_TPREL_HI16
, R_ALPHA_TPRELHI
},
1064 {BFD_RELOC_ALPHA_TPREL_LO16
, R_ALPHA_TPRELLO
},
1065 {BFD_RELOC_ALPHA_TPREL16
, R_ALPHA_TPREL16
},
1068 /* Given a BFD reloc type, return a HOWTO structure. */
1070 static reloc_howto_type
*
1071 elf64_alpha_bfd_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1072 bfd_reloc_code_real_type code
)
1074 const struct elf_reloc_map
*i
, *e
;
1075 i
= e
= elf64_alpha_reloc_map
;
1076 e
+= sizeof (elf64_alpha_reloc_map
) / sizeof (struct elf_reloc_map
);
1079 if (i
->bfd_reloc_val
== code
)
1080 return &elf64_alpha_howto_table
[i
->elf_reloc_val
];
1085 static reloc_howto_type
*
1086 elf64_alpha_bfd_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1092 i
< (sizeof (elf64_alpha_howto_table
)
1093 / sizeof (elf64_alpha_howto_table
[0]));
1095 if (elf64_alpha_howto_table
[i
].name
!= NULL
1096 && strcasecmp (elf64_alpha_howto_table
[i
].name
, r_name
) == 0)
1097 return &elf64_alpha_howto_table
[i
];
1102 /* Given an Alpha ELF reloc type, fill in an arelent structure. */
1105 elf64_alpha_info_to_howto (bfd
*abfd
, arelent
*cache_ptr
,
1106 Elf_Internal_Rela
*dst
)
1108 unsigned r_type
= ELF64_R_TYPE(dst
->r_info
);
1110 if (r_type
>= R_ALPHA_max
)
1112 /* xgettext:c-format */
1113 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1115 bfd_set_error (bfd_error_bad_value
);
1118 cache_ptr
->howto
= &elf64_alpha_howto_table
[r_type
];
1122 /* These two relocations create a two-word entry in the got. */
1123 #define alpha_got_entry_size(r_type) \
1124 (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
1126 /* This is PT_TLS segment p_vaddr. */
1127 #define alpha_get_dtprel_base(info) \
1128 (elf_hash_table (info)->tls_sec->vma)
1130 /* Main program TLS (whose template starts at PT_TLS p_vaddr)
1131 is assigned offset round(16, PT_TLS p_align). */
1132 #define alpha_get_tprel_base(info) \
1133 (elf_hash_table (info)->tls_sec->vma \
1134 - align_power ((bfd_vma) 16, \
1135 elf_hash_table (info)->tls_sec->alignment_power))
1137 /* Handle an Alpha specific section when reading an object file. This
1138 is called when bfd_section_from_shdr finds a section with an unknown
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 (newsect
,
1171 bfd_section_flags (newsect
) | SEC_DEBUGGING
))
1178 /* Convert Alpha specific section flags to bfd internal section flags. */
1181 elf64_alpha_section_flags (const Elf_Internal_Shdr
*hdr
)
1183 if (hdr
->sh_flags
& SHF_ALPHA_GPREL
)
1184 hdr
->bfd_section
->flags
|= SEC_SMALL_DATA
;
1189 /* Set the correct type for an Alpha ELF section. We do this by the
1190 section name, which is a hack, but ought to work. */
1193 elf64_alpha_fake_sections (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*sec
)
1195 register const char *name
;
1197 name
= bfd_section_name (sec
);
1199 if (strcmp (name
, ".mdebug") == 0)
1201 hdr
->sh_type
= SHT_ALPHA_DEBUG
;
1202 /* In a shared object on Irix 5.3, the .mdebug section has an
1203 entsize of 0. FIXME: Does this matter? */
1204 if ((abfd
->flags
& DYNAMIC
) != 0 )
1205 hdr
->sh_entsize
= 0;
1207 hdr
->sh_entsize
= 1;
1209 else if ((sec
->flags
& SEC_SMALL_DATA
)
1210 || strcmp (name
, ".sdata") == 0
1211 || strcmp (name
, ".sbss") == 0
1212 || strcmp (name
, ".lit4") == 0
1213 || strcmp (name
, ".lit8") == 0)
1214 hdr
->sh_flags
|= SHF_ALPHA_GPREL
;
1219 /* Hook called by the linker routine which adds symbols from an object
1220 file. We use it to put .comm items in .sbss, and not .bss. */
1223 elf64_alpha_add_symbol_hook (bfd
*abfd
, struct bfd_link_info
*info
,
1224 Elf_Internal_Sym
*sym
,
1225 const char **namep ATTRIBUTE_UNUSED
,
1226 flagword
*flagsp ATTRIBUTE_UNUSED
,
1227 asection
**secp
, bfd_vma
*valp
)
1229 if (sym
->st_shndx
== SHN_COMMON
1230 && !bfd_link_relocatable (info
)
1231 && sym
->st_size
<= elf_gp_size (abfd
))
1233 /* Common symbols less than or equal to -G nn bytes are
1234 automatically put into .sbss. */
1236 asection
*scomm
= bfd_get_section_by_name (abfd
, ".scommon");
1240 scomm
= bfd_make_section_with_flags (abfd
, ".scommon",
1243 | SEC_LINKER_CREATED
));
1249 *valp
= sym
->st_size
;
1255 /* Create the .got section. */
1258 elf64_alpha_create_got_section (bfd
*abfd
,
1259 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
1264 if (! is_alpha_elf (abfd
))
1267 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1268 | SEC_LINKER_CREATED
);
1269 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
1271 || !bfd_set_section_alignment (s
, 3))
1274 alpha_elf_tdata (abfd
)->got
= s
;
1276 /* Make sure the object's gotobj is set to itself so that we default
1277 to every object with its own .got. We'll merge .gots later once
1278 we've collected each object's info. */
1279 alpha_elf_tdata (abfd
)->gotobj
= abfd
;
1284 /* Create all the dynamic sections. */
1287 elf64_alpha_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
1291 struct elf_link_hash_entry
*h
;
1293 if (! is_alpha_elf (abfd
))
1296 /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
1298 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1299 | SEC_LINKER_CREATED
1300 | (elf64_alpha_use_secureplt
? SEC_READONLY
: 0));
1301 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", flags
);
1302 elf_hash_table (info
)->splt
= s
;
1303 if (s
== NULL
|| ! bfd_set_section_alignment (s
, 4))
1306 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
1308 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
1309 "_PROCEDURE_LINKAGE_TABLE_");
1310 elf_hash_table (info
)->hplt
= h
;
1314 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1315 | SEC_LINKER_CREATED
| SEC_READONLY
);
1316 s
= bfd_make_section_anyway_with_flags (abfd
, ".rela.plt", flags
);
1317 elf_hash_table (info
)->srelplt
= s
;
1318 if (s
== NULL
|| ! bfd_set_section_alignment (s
, 3))
1321 if (elf64_alpha_use_secureplt
)
1323 flags
= SEC_ALLOC
| SEC_LINKER_CREATED
;
1324 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
1325 elf_hash_table (info
)->sgotplt
= s
;
1326 if (s
== NULL
|| ! bfd_set_section_alignment (s
, 3))
1330 /* We may or may not have created a .got section for this object, but
1331 we definitely havn't done the rest of the work. */
1333 if (alpha_elf_tdata(abfd
)->gotobj
== NULL
)
1335 if (!elf64_alpha_create_got_section (abfd
, info
))
1339 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1340 | SEC_LINKER_CREATED
| SEC_READONLY
);
1341 s
= bfd_make_section_anyway_with_flags (abfd
, ".rela.got", flags
);
1342 elf_hash_table (info
)->srelgot
= s
;
1344 || !bfd_set_section_alignment (s
, 3))
1347 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
1348 dynobj's .got section. We don't do this in the linker script
1349 because we don't want to define the symbol if we are not creating
1350 a global offset table. */
1351 h
= _bfd_elf_define_linkage_sym (abfd
, info
, alpha_elf_tdata(abfd
)->got
,
1352 "_GLOBAL_OFFSET_TABLE_");
1353 elf_hash_table (info
)->hgot
= h
;
1360 /* Read ECOFF debugging information from a .mdebug section into a
1361 ecoff_debug_info structure. */
1364 elf64_alpha_read_ecoff_info (bfd
*abfd
, asection
*section
,
1365 struct ecoff_debug_info
*debug
)
1368 const struct ecoff_debug_swap
*swap
;
1369 char *ext_hdr
= NULL
;
1371 swap
= get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
1372 memset (debug
, 0, sizeof (*debug
));
1374 ext_hdr
= (char *) bfd_malloc (swap
->external_hdr_size
);
1375 if (ext_hdr
== NULL
&& swap
->external_hdr_size
!= 0)
1378 if (! bfd_get_section_contents (abfd
, section
, ext_hdr
, (file_ptr
) 0,
1379 swap
->external_hdr_size
))
1382 symhdr
= &debug
->symbolic_header
;
1383 (*swap
->swap_hdr_in
) (abfd
, ext_hdr
, symhdr
);
1385 /* The symbolic header contains absolute file offsets and sizes to
1387 #define READ(ptr, offset, count, size, type) \
1391 debug->ptr = NULL; \
1392 if (symhdr->count == 0) \
1394 if (_bfd_mul_overflow (size, symhdr->count, &amt)) \
1396 bfd_set_error (bfd_error_file_too_big); \
1397 goto error_return; \
1399 if (bfd_seek (abfd, symhdr->offset, SEEK_SET) != 0) \
1400 goto error_return; \
1401 debug->ptr = (type) _bfd_malloc_and_read (abfd, amt, amt); \
1402 if (debug->ptr == NULL) \
1403 goto error_return; \
1406 READ (line
, cbLineOffset
, cbLine
, sizeof (unsigned char), unsigned char *);
1407 READ (external_dnr
, cbDnOffset
, idnMax
, swap
->external_dnr_size
, void *);
1408 READ (external_pdr
, cbPdOffset
, ipdMax
, swap
->external_pdr_size
, void *);
1409 READ (external_sym
, cbSymOffset
, isymMax
, swap
->external_sym_size
, void *);
1410 READ (external_opt
, cbOptOffset
, ioptMax
, swap
->external_opt_size
, void *);
1411 READ (external_aux
, cbAuxOffset
, iauxMax
, sizeof (union aux_ext
),
1413 READ (ss
, cbSsOffset
, issMax
, sizeof (char), char *);
1414 READ (ssext
, cbSsExtOffset
, issExtMax
, sizeof (char), char *);
1415 READ (external_fdr
, cbFdOffset
, ifdMax
, swap
->external_fdr_size
, void *);
1416 READ (external_rfd
, cbRfdOffset
, crfd
, swap
->external_rfd_size
, void *);
1417 READ (external_ext
, cbExtOffset
, iextMax
, swap
->external_ext_size
, void *);
1425 if (ext_hdr
!= NULL
)
1427 if (debug
->line
!= NULL
)
1429 if (debug
->external_dnr
!= NULL
)
1430 free (debug
->external_dnr
);
1431 if (debug
->external_pdr
!= NULL
)
1432 free (debug
->external_pdr
);
1433 if (debug
->external_sym
!= NULL
)
1434 free (debug
->external_sym
);
1435 if (debug
->external_opt
!= NULL
)
1436 free (debug
->external_opt
);
1437 if (debug
->external_aux
!= NULL
)
1438 free (debug
->external_aux
);
1439 if (debug
->ss
!= NULL
)
1441 if (debug
->ssext
!= NULL
)
1442 free (debug
->ssext
);
1443 if (debug
->external_fdr
!= NULL
)
1444 free (debug
->external_fdr
);
1445 if (debug
->external_rfd
!= NULL
)
1446 free (debug
->external_rfd
);
1447 if (debug
->external_ext
!= NULL
)
1448 free (debug
->external_ext
);
1452 /* Alpha ELF local labels start with '$'. */
1455 elf64_alpha_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
1457 return name
[0] == '$';
1461 elf64_alpha_find_nearest_line (bfd
*abfd
, asymbol
**symbols
,
1462 asection
*section
, bfd_vma offset
,
1463 const char **filename_ptr
,
1464 const char **functionname_ptr
,
1465 unsigned int *line_ptr
,
1466 unsigned int *discriminator_ptr
)
1470 if (_bfd_dwarf2_find_nearest_line (abfd
, symbols
, NULL
, section
, offset
,
1471 filename_ptr
, functionname_ptr
,
1472 line_ptr
, discriminator_ptr
,
1473 dwarf_debug_sections
,
1474 &elf_tdata (abfd
)->dwarf2_find_line_info
)
1478 msec
= bfd_get_section_by_name (abfd
, ".mdebug");
1482 struct alpha_elf_find_line
*fi
;
1483 const struct ecoff_debug_swap
* const swap
=
1484 get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
1486 /* If we are called during a link, alpha_elf_final_link may have
1487 cleared the SEC_HAS_CONTENTS field. We force it back on here
1488 if appropriate (which it normally will be). */
1489 origflags
= msec
->flags
;
1490 if (elf_section_data (msec
)->this_hdr
.sh_type
!= SHT_NOBITS
)
1491 msec
->flags
|= SEC_HAS_CONTENTS
;
1493 fi
= alpha_elf_tdata (abfd
)->find_line_info
;
1496 bfd_size_type external_fdr_size
;
1499 struct fdr
*fdr_ptr
;
1500 bfd_size_type amt
= sizeof (struct alpha_elf_find_line
);
1502 fi
= (struct alpha_elf_find_line
*) bfd_zalloc (abfd
, amt
);
1505 msec
->flags
= origflags
;
1509 if (!elf64_alpha_read_ecoff_info (abfd
, msec
, &fi
->d
))
1511 msec
->flags
= origflags
;
1515 /* Swap in the FDR information. */
1516 amt
= fi
->d
.symbolic_header
.ifdMax
* sizeof (struct fdr
);
1517 fi
->d
.fdr
= (struct fdr
*) bfd_alloc (abfd
, amt
);
1518 if (fi
->d
.fdr
== NULL
)
1520 msec
->flags
= origflags
;
1523 external_fdr_size
= swap
->external_fdr_size
;
1524 fdr_ptr
= fi
->d
.fdr
;
1525 fraw_src
= (char *) fi
->d
.external_fdr
;
1526 fraw_end
= (fraw_src
1527 + fi
->d
.symbolic_header
.ifdMax
* external_fdr_size
);
1528 for (; fraw_src
< fraw_end
; fraw_src
+= external_fdr_size
, fdr_ptr
++)
1529 (*swap
->swap_fdr_in
) (abfd
, fraw_src
, fdr_ptr
);
1531 alpha_elf_tdata (abfd
)->find_line_info
= fi
;
1533 /* Note that we don't bother to ever free this information.
1534 find_nearest_line is either called all the time, as in
1535 objdump -l, so the information should be saved, or it is
1536 rarely called, as in ld error messages, so the memory
1537 wasted is unimportant. Still, it would probably be a
1538 good idea for free_cached_info to throw it away. */
1541 if (_bfd_ecoff_locate_line (abfd
, section
, offset
, &fi
->d
, swap
,
1542 &fi
->i
, filename_ptr
, functionname_ptr
,
1545 msec
->flags
= origflags
;
1549 msec
->flags
= origflags
;
1552 /* Fall back on the generic ELF find_nearest_line routine. */
1554 return _bfd_elf_find_nearest_line (abfd
, symbols
, section
, offset
,
1555 filename_ptr
, functionname_ptr
,
1556 line_ptr
, discriminator_ptr
);
1559 /* Structure used to pass information to alpha_elf_output_extsym. */
1564 struct bfd_link_info
*info
;
1565 struct ecoff_debug_info
*debug
;
1566 const struct ecoff_debug_swap
*swap
;
1571 elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry
*h
, void * data
)
1573 struct extsym_info
*einfo
= (struct extsym_info
*) data
;
1575 asection
*sec
, *output_section
;
1577 if (h
->root
.indx
== -2)
1579 else if ((h
->root
.def_dynamic
1580 || h
->root
.ref_dynamic
1581 || h
->root
.root
.type
== bfd_link_hash_new
)
1582 && !h
->root
.def_regular
1583 && !h
->root
.ref_regular
)
1585 else if (einfo
->info
->strip
== strip_all
1586 || (einfo
->info
->strip
== strip_some
1587 && bfd_hash_lookup (einfo
->info
->keep_hash
,
1588 h
->root
.root
.root
.string
,
1589 FALSE
, FALSE
) == NULL
))
1597 if (h
->esym
.ifd
== -2)
1600 h
->esym
.cobol_main
= 0;
1601 h
->esym
.weakext
= 0;
1602 h
->esym
.reserved
= 0;
1603 h
->esym
.ifd
= ifdNil
;
1604 h
->esym
.asym
.value
= 0;
1605 h
->esym
.asym
.st
= stGlobal
;
1607 if (h
->root
.root
.type
!= bfd_link_hash_defined
1608 && h
->root
.root
.type
!= bfd_link_hash_defweak
)
1609 h
->esym
.asym
.sc
= scAbs
;
1614 sec
= h
->root
.root
.u
.def
.section
;
1615 output_section
= sec
->output_section
;
1617 /* When making a shared library and symbol h is the one from
1618 the another shared library, OUTPUT_SECTION may be null. */
1619 if (output_section
== NULL
)
1620 h
->esym
.asym
.sc
= scUndefined
;
1623 name
= bfd_section_name (output_section
);
1625 if (strcmp (name
, ".text") == 0)
1626 h
->esym
.asym
.sc
= scText
;
1627 else if (strcmp (name
, ".data") == 0)
1628 h
->esym
.asym
.sc
= scData
;
1629 else if (strcmp (name
, ".sdata") == 0)
1630 h
->esym
.asym
.sc
= scSData
;
1631 else if (strcmp (name
, ".rodata") == 0
1632 || strcmp (name
, ".rdata") == 0)
1633 h
->esym
.asym
.sc
= scRData
;
1634 else if (strcmp (name
, ".bss") == 0)
1635 h
->esym
.asym
.sc
= scBss
;
1636 else if (strcmp (name
, ".sbss") == 0)
1637 h
->esym
.asym
.sc
= scSBss
;
1638 else if (strcmp (name
, ".init") == 0)
1639 h
->esym
.asym
.sc
= scInit
;
1640 else if (strcmp (name
, ".fini") == 0)
1641 h
->esym
.asym
.sc
= scFini
;
1643 h
->esym
.asym
.sc
= scAbs
;
1647 h
->esym
.asym
.reserved
= 0;
1648 h
->esym
.asym
.index
= indexNil
;
1651 if (h
->root
.root
.type
== bfd_link_hash_common
)
1652 h
->esym
.asym
.value
= h
->root
.root
.u
.c
.size
;
1653 else if (h
->root
.root
.type
== bfd_link_hash_defined
1654 || h
->root
.root
.type
== bfd_link_hash_defweak
)
1656 if (h
->esym
.asym
.sc
== scCommon
)
1657 h
->esym
.asym
.sc
= scBss
;
1658 else if (h
->esym
.asym
.sc
== scSCommon
)
1659 h
->esym
.asym
.sc
= scSBss
;
1661 sec
= h
->root
.root
.u
.def
.section
;
1662 output_section
= sec
->output_section
;
1663 if (output_section
!= NULL
)
1664 h
->esym
.asym
.value
= (h
->root
.root
.u
.def
.value
1665 + sec
->output_offset
1666 + output_section
->vma
);
1668 h
->esym
.asym
.value
= 0;
1671 if (! bfd_ecoff_debug_one_external (einfo
->abfd
, einfo
->debug
, einfo
->swap
,
1672 h
->root
.root
.root
.string
,
1675 einfo
->failed
= TRUE
;
1682 /* Search for and possibly create a got entry. */
1684 static struct alpha_elf_got_entry
*
1685 get_got_entry (bfd
*abfd
, struct alpha_elf_link_hash_entry
*h
,
1686 unsigned long r_type
, unsigned long r_symndx
,
1689 struct alpha_elf_got_entry
*gotent
;
1690 struct alpha_elf_got_entry
**slot
;
1693 slot
= &h
->got_entries
;
1696 /* This is a local .got entry -- record for merge. */
1698 struct alpha_elf_got_entry
**local_got_entries
;
1700 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
1701 if (!local_got_entries
)
1704 Elf_Internal_Shdr
*symtab_hdr
;
1706 symtab_hdr
= &elf_tdata(abfd
)->symtab_hdr
;
1707 size
= symtab_hdr
->sh_info
;
1708 size
*= sizeof (struct alpha_elf_got_entry
*);
1711 = (struct alpha_elf_got_entry
**) bfd_zalloc (abfd
, size
);
1712 if (!local_got_entries
)
1715 alpha_elf_tdata (abfd
)->local_got_entries
= local_got_entries
;
1718 slot
= &local_got_entries
[r_symndx
];
1721 for (gotent
= *slot
; gotent
; gotent
= gotent
->next
)
1722 if (gotent
->gotobj
== abfd
1723 && gotent
->reloc_type
== r_type
1724 && gotent
->addend
== r_addend
)
1732 amt
= sizeof (struct alpha_elf_got_entry
);
1733 gotent
= (struct alpha_elf_got_entry
*) bfd_alloc (abfd
, amt
);
1737 gotent
->gotobj
= abfd
;
1738 gotent
->addend
= r_addend
;
1739 gotent
->got_offset
= -1;
1740 gotent
->plt_offset
= -1;
1741 gotent
->use_count
= 1;
1742 gotent
->reloc_type
= r_type
;
1743 gotent
->reloc_done
= 0;
1744 gotent
->reloc_xlated
= 0;
1746 gotent
->next
= *slot
;
1749 entry_size
= alpha_got_entry_size (r_type
);
1750 alpha_elf_tdata (abfd
)->total_got_size
+= entry_size
;
1752 alpha_elf_tdata(abfd
)->local_got_size
+= entry_size
;
1755 gotent
->use_count
+= 1;
1761 elf64_alpha_want_plt (struct alpha_elf_link_hash_entry
*ah
)
1763 return ((ah
->root
.type
== STT_FUNC
1764 || ah
->root
.root
.type
== bfd_link_hash_undefweak
1765 || ah
->root
.root
.type
== bfd_link_hash_undefined
)
1766 && (ah
->flags
& ALPHA_ELF_LINK_HASH_LU_PLT
) != 0
1767 && (ah
->flags
& ~ALPHA_ELF_LINK_HASH_LU_PLT
) == 0);
1770 /* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset.
1771 Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE
1772 as is. On the other hand, elf-eh-frame.c processing requires .eh_frame
1773 relocs to be sorted. */
1776 elf64_alpha_sort_relocs_p (asection
*sec
)
1778 return (sec
->flags
& SEC_CODE
) == 0;
1782 /* Handle dynamic relocations when doing an Alpha ELF link. */
1785 elf64_alpha_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1786 asection
*sec
, const Elf_Internal_Rela
*relocs
)
1790 Elf_Internal_Shdr
*symtab_hdr
;
1791 struct alpha_elf_link_hash_entry
**sym_hashes
;
1792 const Elf_Internal_Rela
*rel
, *relend
;
1794 if (bfd_link_relocatable (info
))
1797 /* Don't do anything special with non-loaded, non-alloced sections.
1798 In particular, any relocs in such sections should not affect GOT
1799 and PLT reference counting (ie. we don't allow them to create GOT
1800 or PLT entries), there's no possibility or desire to optimize TLS
1801 relocs, and there's not much point in propagating relocs to shared
1802 libs that the dynamic linker won't relocate. */
1803 if ((sec
->flags
& SEC_ALLOC
) == 0)
1806 BFD_ASSERT (is_alpha_elf (abfd
));
1808 dynobj
= elf_hash_table (info
)->dynobj
;
1810 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1813 symtab_hdr
= &elf_symtab_hdr (abfd
);
1814 sym_hashes
= alpha_elf_sym_hashes (abfd
);
1816 relend
= relocs
+ sec
->reloc_count
;
1817 for (rel
= relocs
; rel
< relend
; ++rel
)
1825 unsigned long r_symndx
, r_type
;
1826 struct alpha_elf_link_hash_entry
*h
;
1827 unsigned int gotent_flags
;
1828 bfd_boolean maybe_dynamic
;
1832 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1833 if (r_symndx
< symtab_hdr
->sh_info
)
1837 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1839 while (h
->root
.root
.type
== bfd_link_hash_indirect
1840 || h
->root
.root
.type
== bfd_link_hash_warning
)
1841 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
1843 /* PR15323, ref flags aren't set for references in the same
1845 h
->root
.ref_regular
= 1;
1848 /* We can only get preliminary data on whether a symbol is
1849 locally or externally defined, as not all of the input files
1850 have yet been processed. Do something with what we know, as
1851 this may help reduce memory usage and processing time later. */
1852 maybe_dynamic
= FALSE
;
1853 if (h
&& ((bfd_link_pic (info
)
1855 || info
->unresolved_syms_in_shared_libs
== RM_IGNORE
))
1856 || !h
->root
.def_regular
1857 || h
->root
.root
.type
== bfd_link_hash_defweak
))
1858 maybe_dynamic
= TRUE
;
1862 r_type
= ELF64_R_TYPE (rel
->r_info
);
1863 addend
= rel
->r_addend
;
1867 case R_ALPHA_LITERAL
:
1868 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1870 /* Remember how this literal is used from its LITUSEs.
1871 This will be important when it comes to decide if we can
1872 create a .plt entry for a function symbol. */
1873 while (++rel
< relend
&& ELF64_R_TYPE (rel
->r_info
) == R_ALPHA_LITUSE
)
1874 if (rel
->r_addend
>= 1 && rel
->r_addend
<= 6)
1875 gotent_flags
|= 1 << rel
->r_addend
;
1878 /* No LITUSEs -- presumably the address is used somehow. */
1879 if (gotent_flags
== 0)
1880 gotent_flags
= ALPHA_ELF_LINK_HASH_LU_ADDR
;
1883 case R_ALPHA_GPDISP
:
1884 case R_ALPHA_GPREL16
:
1885 case R_ALPHA_GPREL32
:
1886 case R_ALPHA_GPRELHIGH
:
1887 case R_ALPHA_GPRELLOW
:
1892 case R_ALPHA_REFLONG
:
1893 case R_ALPHA_REFQUAD
:
1894 if (bfd_link_pic (info
) || maybe_dynamic
)
1898 case R_ALPHA_TLSLDM
:
1899 /* The symbol for a TLSLDM reloc is ignored. Collapse the
1900 reloc to the STN_UNDEF (0) symbol so that they all match. */
1901 r_symndx
= STN_UNDEF
;
1903 maybe_dynamic
= FALSE
;
1907 case R_ALPHA_GOTDTPREL
:
1908 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1911 case R_ALPHA_GOTTPREL
:
1912 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1913 gotent_flags
= ALPHA_ELF_LINK_HASH_TLS_IE
;
1914 if (bfd_link_pic (info
))
1915 info
->flags
|= DF_STATIC_TLS
;
1918 case R_ALPHA_TPREL64
:
1919 if (bfd_link_dll (info
))
1921 info
->flags
|= DF_STATIC_TLS
;
1924 else if (maybe_dynamic
)
1929 if (need
& NEED_GOT
)
1931 if (alpha_elf_tdata(abfd
)->gotobj
== NULL
)
1933 if (!elf64_alpha_create_got_section (abfd
, info
))
1938 if (need
& NEED_GOT_ENTRY
)
1940 struct alpha_elf_got_entry
*gotent
;
1942 gotent
= get_got_entry (abfd
, h
, r_type
, r_symndx
, addend
);
1948 gotent
->flags
|= gotent_flags
;
1951 gotent_flags
|= h
->flags
;
1952 h
->flags
= gotent_flags
;
1954 /* Make a guess as to whether a .plt entry is needed. */
1955 /* ??? It appears that we won't make it into
1956 adjust_dynamic_symbol for symbols that remain
1957 totally undefined. Copying this check here means
1958 we can create a plt entry for them too. */
1960 = (maybe_dynamic
&& elf64_alpha_want_plt (h
));
1965 if (need
& NEED_DYNREL
)
1967 /* We need to create the section here now whether we eventually
1968 use it or not so that it gets mapped to an output section by
1969 the linker. If not used, we'll kill it in size_dynamic_sections. */
1972 sreloc
= _bfd_elf_make_dynamic_reloc_section
1973 (sec
, dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1981 /* Since we havn't seen all of the input symbols yet, we
1982 don't know whether we'll actually need a dynamic relocation
1983 entry for this reloc. So make a record of it. Once we
1984 find out if this thing needs dynamic relocation we'll
1985 expand the relocation sections by the appropriate amount. */
1987 struct alpha_elf_reloc_entry
*rent
;
1989 for (rent
= h
->reloc_entries
; rent
; rent
= rent
->next
)
1990 if (rent
->rtype
== r_type
&& rent
->srel
== sreloc
)
1995 size_t amt
= sizeof (struct alpha_elf_reloc_entry
);
1996 rent
= (struct alpha_elf_reloc_entry
*) bfd_alloc (abfd
, amt
);
2000 rent
->srel
= sreloc
;
2002 rent
->rtype
= r_type
;
2005 rent
->next
= h
->reloc_entries
;
2006 h
->reloc_entries
= rent
;
2011 else if (bfd_link_pic (info
))
2013 /* If this is a shared library, and the section is to be
2014 loaded into memory, we need a RELATIVE reloc. */
2015 sreloc
->size
+= sizeof (Elf64_External_Rela
);
2016 if (sec
->flags
& SEC_READONLY
)
2018 info
->flags
|= DF_TEXTREL
;
2019 info
->callbacks
->minfo
2020 (_("%pB: dynamic relocation against `%pT' in "
2021 "read-only section `%pA'\n"),
2022 sec
->owner
, h
->root
.root
.root
.string
, sec
);
2031 /* Return the section that should be marked against GC for a given
2035 elf64_alpha_gc_mark_hook (asection
*sec
, struct bfd_link_info
*info
,
2036 Elf_Internal_Rela
*rel
,
2037 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
)
2039 /* These relocations don't really reference a symbol. Instead we store
2040 extra data in their addend slot. Ignore the symbol. */
2041 switch (ELF64_R_TYPE (rel
->r_info
))
2043 case R_ALPHA_LITUSE
:
2044 case R_ALPHA_GPDISP
:
2049 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2052 /* Adjust a symbol defined by a dynamic object and referenced by a
2053 regular object. The current definition is in some section of the
2054 dynamic object, but we're not including those sections. We have to
2055 change the definition to something the rest of the link can
2059 elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2060 struct elf_link_hash_entry
*h
)
2064 struct alpha_elf_link_hash_entry
*ah
;
2066 dynobj
= elf_hash_table(info
)->dynobj
;
2067 ah
= (struct alpha_elf_link_hash_entry
*)h
;
2069 /* Now that we've seen all of the input symbols, finalize our decision
2070 about whether this symbol should get a .plt entry. Irritatingly, it
2071 is common for folk to leave undefined symbols in shared libraries,
2072 and they still expect lazy binding; accept undefined symbols in lieu
2074 if (alpha_elf_dynamic_symbol_p (h
, info
) && elf64_alpha_want_plt (ah
))
2076 h
->needs_plt
= TRUE
;
2078 s
= elf_hash_table(info
)->splt
;
2079 if (!s
&& !elf64_alpha_create_dynamic_sections (dynobj
, info
))
2082 /* We need one plt entry per got subsection. Delay allocation of
2083 the actual plt entries until size_plt_section, called from
2084 size_dynamic_sections or during relaxation. */
2089 h
->needs_plt
= FALSE
;
2091 /* If this is a weak symbol, and there is a real definition, the
2092 processor independent code will have arranged for us to see the
2093 real definition first, and we can just use the same value. */
2094 if (h
->is_weakalias
)
2096 struct elf_link_hash_entry
*def
= weakdef (h
);
2097 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
2098 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
2099 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
2103 /* This is a reference to a symbol defined by a dynamic object which
2104 is not a function. The Alpha, since it uses .got entries for all
2105 symbols even in regular objects, does not need the hackery of a
2106 .dynbss section and COPY dynamic relocations. */
2111 /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
2114 elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry
*h
,
2115 const Elf_Internal_Sym
*isym
,
2116 bfd_boolean definition
,
2117 bfd_boolean dynamic
)
2119 if (!dynamic
&& definition
)
2120 h
->other
= ((h
->other
& ELF_ST_VISIBILITY (-1))
2121 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
2124 /* Symbol versioning can create new symbols, and make our old symbols
2125 indirect to the new ones. Consolidate the got and reloc information
2126 in these situations. */
2129 elf64_alpha_copy_indirect_symbol (struct bfd_link_info
*info
,
2130 struct elf_link_hash_entry
*dir
,
2131 struct elf_link_hash_entry
*ind
)
2133 struct alpha_elf_link_hash_entry
*hi
2134 = (struct alpha_elf_link_hash_entry
*) ind
;
2135 struct alpha_elf_link_hash_entry
*hs
2136 = (struct alpha_elf_link_hash_entry
*) dir
;
2138 /* Do the merging in the superclass. */
2139 _bfd_elf_link_hash_copy_indirect(info
, dir
, ind
);
2141 /* Merge the flags. Whee. */
2142 hs
->flags
|= hi
->flags
;
2144 /* ??? It's unclear to me what's really supposed to happen when
2145 "merging" defweak and defined symbols, given that we don't
2146 actually throw away the defweak. This more-or-less copies
2147 the logic related to got and plt entries in the superclass. */
2148 if (ind
->root
.type
!= bfd_link_hash_indirect
)
2151 /* Merge the .got entries. Cannibalize the old symbol's list in
2152 doing so, since we don't need it anymore. */
2154 if (hs
->got_entries
== NULL
)
2155 hs
->got_entries
= hi
->got_entries
;
2158 struct alpha_elf_got_entry
*gi
, *gs
, *gin
, *gsh
;
2160 gsh
= hs
->got_entries
;
2161 for (gi
= hi
->got_entries
; gi
; gi
= gin
)
2164 for (gs
= gsh
; gs
; gs
= gs
->next
)
2165 if (gi
->gotobj
== gs
->gotobj
2166 && gi
->reloc_type
== gs
->reloc_type
2167 && gi
->addend
== gs
->addend
)
2169 gs
->use_count
+= gi
->use_count
;
2172 gi
->next
= hs
->got_entries
;
2173 hs
->got_entries
= gi
;
2177 hi
->got_entries
= NULL
;
2179 /* And similar for the reloc entries. */
2181 if (hs
->reloc_entries
== NULL
)
2182 hs
->reloc_entries
= hi
->reloc_entries
;
2185 struct alpha_elf_reloc_entry
*ri
, *rs
, *rin
, *rsh
;
2187 rsh
= hs
->reloc_entries
;
2188 for (ri
= hi
->reloc_entries
; ri
; ri
= rin
)
2191 for (rs
= rsh
; rs
; rs
= rs
->next
)
2192 if (ri
->rtype
== rs
->rtype
&& ri
->srel
== rs
->srel
)
2194 rs
->count
+= ri
->count
;
2197 ri
->next
= hs
->reloc_entries
;
2198 hs
->reloc_entries
= ri
;
2202 hi
->reloc_entries
= NULL
;
2205 /* Is it possible to merge two object file's .got tables? */
2208 elf64_alpha_can_merge_gots (bfd
*a
, bfd
*b
)
2210 int total
= alpha_elf_tdata (a
)->total_got_size
;
2213 /* Trivial quick fallout test. */
2214 if (total
+ alpha_elf_tdata (b
)->total_got_size
<= MAX_GOT_SIZE
)
2217 /* By their nature, local .got entries cannot be merged. */
2218 if ((total
+= alpha_elf_tdata (b
)->local_got_size
) > MAX_GOT_SIZE
)
2221 /* Failing the common trivial comparison, we must effectively
2222 perform the merge. Not actually performing the merge means that
2223 we don't have to store undo information in case we fail. */
2224 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2226 struct alpha_elf_link_hash_entry
**hashes
= alpha_elf_sym_hashes (bsub
);
2227 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2230 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2231 for (i
= 0; i
< n
; ++i
)
2233 struct alpha_elf_got_entry
*ae
, *be
;
2234 struct alpha_elf_link_hash_entry
*h
;
2237 while (h
->root
.root
.type
== bfd_link_hash_indirect
2238 || h
->root
.root
.type
== bfd_link_hash_warning
)
2239 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2241 for (be
= h
->got_entries
; be
; be
= be
->next
)
2243 if (be
->use_count
== 0)
2245 if (be
->gotobj
!= b
)
2248 for (ae
= h
->got_entries
; ae
; ae
= ae
->next
)
2250 && ae
->reloc_type
== be
->reloc_type
2251 && ae
->addend
== be
->addend
)
2254 total
+= alpha_got_entry_size (be
->reloc_type
);
2255 if (total
> MAX_GOT_SIZE
)
2265 /* Actually merge two .got tables. */
2268 elf64_alpha_merge_gots (bfd
*a
, bfd
*b
)
2270 int total
= alpha_elf_tdata (a
)->total_got_size
;
2273 /* Remember local expansion. */
2275 int e
= alpha_elf_tdata (b
)->local_got_size
;
2277 alpha_elf_tdata (a
)->local_got_size
+= e
;
2280 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2282 struct alpha_elf_got_entry
**local_got_entries
;
2283 struct alpha_elf_link_hash_entry
**hashes
;
2284 Elf_Internal_Shdr
*symtab_hdr
;
2287 /* Let the local .got entries know they are part of a new subsegment. */
2288 local_got_entries
= alpha_elf_tdata (bsub
)->local_got_entries
;
2289 if (local_got_entries
)
2291 n
= elf_tdata (bsub
)->symtab_hdr
.sh_info
;
2292 for (i
= 0; i
< n
; ++i
)
2294 struct alpha_elf_got_entry
*ent
;
2295 for (ent
= local_got_entries
[i
]; ent
; ent
= ent
->next
)
2300 /* Merge the global .got entries. */
2301 hashes
= alpha_elf_sym_hashes (bsub
);
2302 symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2304 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2305 for (i
= 0; i
< n
; ++i
)
2307 struct alpha_elf_got_entry
*ae
, *be
, **pbe
, **start
;
2308 struct alpha_elf_link_hash_entry
*h
;
2311 while (h
->root
.root
.type
== bfd_link_hash_indirect
2312 || h
->root
.root
.type
== bfd_link_hash_warning
)
2313 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2315 pbe
= start
= &h
->got_entries
;
2316 while ((be
= *pbe
) != NULL
)
2318 if (be
->use_count
== 0)
2321 memset (be
, 0xa5, sizeof (*be
));
2324 if (be
->gotobj
!= b
)
2327 for (ae
= *start
; ae
; ae
= ae
->next
)
2329 && ae
->reloc_type
== be
->reloc_type
2330 && ae
->addend
== be
->addend
)
2332 ae
->flags
|= be
->flags
;
2333 ae
->use_count
+= be
->use_count
;
2335 memset (be
, 0xa5, sizeof (*be
));
2339 total
+= alpha_got_entry_size (be
->reloc_type
);
2347 alpha_elf_tdata (bsub
)->gotobj
= a
;
2349 alpha_elf_tdata (a
)->total_got_size
= total
;
2351 /* Merge the two in_got chains. */
2356 while ((next
= alpha_elf_tdata (bsub
)->in_got_link_next
) != NULL
)
2359 alpha_elf_tdata (bsub
)->in_got_link_next
= b
;
2363 /* Calculate the offsets for the got entries. */
2366 elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry
*h
,
2367 void * arg ATTRIBUTE_UNUSED
)
2369 struct alpha_elf_got_entry
*gotent
;
2371 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2372 if (gotent
->use_count
> 0)
2374 struct alpha_elf_obj_tdata
*td
;
2375 bfd_size_type
*plge
;
2377 td
= alpha_elf_tdata (gotent
->gotobj
);
2378 plge
= &td
->got
->size
;
2379 gotent
->got_offset
= *plge
;
2380 *plge
+= alpha_got_entry_size (gotent
->reloc_type
);
2387 elf64_alpha_calc_got_offsets (struct bfd_link_info
*info
)
2390 struct alpha_elf_link_hash_table
* htab
;
2392 htab
= alpha_elf_hash_table (info
);
2395 got_list
= htab
->got_list
;
2397 /* First, zero out the .got sizes, as we may be recalculating the
2398 .got after optimizing it. */
2399 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2400 alpha_elf_tdata(i
)->got
->size
= 0;
2402 /* Next, fill in the offsets for all the global entries. */
2403 alpha_elf_link_hash_traverse (htab
,
2404 elf64_alpha_calc_got_offsets_for_symbol
,
2407 /* Finally, fill in the offsets for the local entries. */
2408 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2410 bfd_size_type got_offset
= alpha_elf_tdata(i
)->got
->size
;
2413 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2415 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2418 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2419 if (!local_got_entries
)
2422 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2423 for (gotent
= local_got_entries
[k
]; gotent
; gotent
= gotent
->next
)
2424 if (gotent
->use_count
> 0)
2426 gotent
->got_offset
= got_offset
;
2427 got_offset
+= alpha_got_entry_size (gotent
->reloc_type
);
2431 alpha_elf_tdata(i
)->got
->size
= got_offset
;
2435 /* Constructs the gots. */
2438 elf64_alpha_size_got_sections (struct bfd_link_info
*info
,
2439 bfd_boolean may_merge
)
2441 bfd
*i
, *got_list
, *cur_got_obj
= NULL
;
2442 struct alpha_elf_link_hash_table
* htab
;
2444 htab
= alpha_elf_hash_table (info
);
2447 got_list
= htab
->got_list
;
2449 /* On the first time through, pretend we have an existing got list
2450 consisting of all of the input files. */
2451 if (got_list
== NULL
)
2453 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
2457 if (! is_alpha_elf (i
))
2460 this_got
= alpha_elf_tdata (i
)->gotobj
;
2461 if (this_got
== NULL
)
2464 /* We are assuming no merging has yet occurred. */
2465 BFD_ASSERT (this_got
== i
);
2467 if (alpha_elf_tdata (this_got
)->total_got_size
> MAX_GOT_SIZE
)
2469 /* Yikes! A single object file has too many entries. */
2471 /* xgettext:c-format */
2472 (_("%pB: .got subsegment exceeds 64K (size %d)"),
2473 i
, alpha_elf_tdata (this_got
)->total_got_size
);
2477 if (got_list
== NULL
)
2478 got_list
= this_got
;
2480 alpha_elf_tdata(cur_got_obj
)->got_link_next
= this_got
;
2481 cur_got_obj
= this_got
;
2484 /* Strange degenerate case of no got references. */
2485 if (got_list
== NULL
)
2488 htab
->got_list
= got_list
;
2491 cur_got_obj
= got_list
;
2492 if (cur_got_obj
== NULL
)
2497 i
= alpha_elf_tdata(cur_got_obj
)->got_link_next
;
2500 if (elf64_alpha_can_merge_gots (cur_got_obj
, i
))
2502 elf64_alpha_merge_gots (cur_got_obj
, i
);
2504 alpha_elf_tdata(i
)->got
->size
= 0;
2505 i
= alpha_elf_tdata(i
)->got_link_next
;
2506 alpha_elf_tdata(cur_got_obj
)->got_link_next
= i
;
2511 i
= alpha_elf_tdata(i
)->got_link_next
;
2516 /* Once the gots have been merged, fill in the got offsets for
2517 everything therein. */
2518 elf64_alpha_calc_got_offsets (info
);
2524 elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry
*h
,
2527 asection
*splt
= (asection
*) data
;
2528 struct alpha_elf_got_entry
*gotent
;
2529 bfd_boolean saw_one
= FALSE
;
2531 /* If we didn't need an entry before, we still don't. */
2532 if (!h
->root
.needs_plt
)
2535 /* For each LITERAL got entry still in use, allocate a plt entry. */
2536 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2537 if (gotent
->reloc_type
== R_ALPHA_LITERAL
2538 && gotent
->use_count
> 0)
2540 if (splt
->size
== 0)
2541 splt
->size
= PLT_HEADER_SIZE
;
2542 gotent
->plt_offset
= splt
->size
;
2543 splt
->size
+= PLT_ENTRY_SIZE
;
2547 /* If there weren't any, there's no longer a need for the PLT entry. */
2549 h
->root
.needs_plt
= FALSE
;
2554 /* Called from relax_section to rebuild the PLT in light of potential changes
2555 in the function's status. */
2558 elf64_alpha_size_plt_section (struct bfd_link_info
*info
)
2560 asection
*splt
, *spltrel
, *sgotplt
;
2561 unsigned long entries
;
2562 struct alpha_elf_link_hash_table
* htab
;
2564 htab
= alpha_elf_hash_table (info
);
2568 splt
= elf_hash_table(info
)->splt
;
2574 alpha_elf_link_hash_traverse (htab
,
2575 elf64_alpha_size_plt_section_1
, splt
);
2577 /* Every plt entry requires a JMP_SLOT relocation. */
2578 spltrel
= elf_hash_table(info
)->srelplt
;
2582 if (elf64_alpha_use_secureplt
)
2583 entries
= (splt
->size
- NEW_PLT_HEADER_SIZE
) / NEW_PLT_ENTRY_SIZE
;
2585 entries
= (splt
->size
- OLD_PLT_HEADER_SIZE
) / OLD_PLT_ENTRY_SIZE
;
2587 spltrel
->size
= entries
* sizeof (Elf64_External_Rela
);
2589 /* When using the secureplt, we need two words somewhere in the data
2590 segment for the dynamic linker to tell us where to go. This is the
2591 entire contents of the .got.plt section. */
2592 if (elf64_alpha_use_secureplt
)
2594 sgotplt
= elf_hash_table(info
)->sgotplt
;
2595 sgotplt
->size
= entries
? 16 : 0;
2600 elf64_alpha_always_size_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2601 struct bfd_link_info
*info
)
2604 struct alpha_elf_link_hash_table
* htab
;
2606 if (bfd_link_relocatable (info
))
2609 htab
= alpha_elf_hash_table (info
);
2613 if (!elf64_alpha_size_got_sections (info
, TRUE
))
2616 /* Allocate space for all of the .got subsections. */
2618 for ( ; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2620 asection
*s
= alpha_elf_tdata(i
)->got
;
2623 s
->contents
= (bfd_byte
*) bfd_zalloc (i
, s
->size
);
2624 if (s
->contents
== NULL
)
2632 /* The number of dynamic relocations required by a static relocation. */
2635 alpha_dynamic_entries_for_reloc (int r_type
, int dynamic
, int shared
, int pie
)
2639 /* May appear in GOT entries. */
2641 return (dynamic
? 2 : shared
? 1 : 0);
2642 case R_ALPHA_TLSLDM
:
2644 case R_ALPHA_LITERAL
:
2645 return dynamic
|| shared
;
2646 case R_ALPHA_GOTTPREL
:
2647 return dynamic
|| (shared
&& !pie
);
2648 case R_ALPHA_GOTDTPREL
:
2651 /* May appear in data sections. */
2652 case R_ALPHA_REFLONG
:
2653 case R_ALPHA_REFQUAD
:
2654 return dynamic
|| shared
;
2655 case R_ALPHA_TPREL64
:
2656 return dynamic
|| (shared
&& !pie
);
2658 /* Everything else is illegal. We'll issue an error during
2659 relocate_section. */
2665 /* Work out the sizes of the dynamic relocation entries. */
2668 elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry
*h
,
2669 struct bfd_link_info
*info
)
2671 bfd_boolean dynamic
;
2672 struct alpha_elf_reloc_entry
*relent
;
2673 unsigned long entries
;
2675 /* If the symbol was defined as a common symbol in a regular object
2676 file, and there was no definition in any dynamic object, then the
2677 linker will have allocated space for the symbol in a common
2678 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
2679 set. This is done for dynamic symbols in
2680 elf_adjust_dynamic_symbol but this is not done for non-dynamic
2681 symbols, somehow. */
2682 if (!h
->root
.def_regular
2683 && h
->root
.ref_regular
2684 && !h
->root
.def_dynamic
2685 && (h
->root
.root
.type
== bfd_link_hash_defined
2686 || h
->root
.root
.type
== bfd_link_hash_defweak
)
2687 && !(h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
))
2688 h
->root
.def_regular
= 1;
2690 /* If the symbol is dynamic, we'll need all the relocations in their
2691 natural form. If this is a shared object, and it has been forced
2692 local, we'll need the same number of RELATIVE relocations. */
2693 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2695 /* If the symbol is a hidden undefined weak, then we never have any
2696 relocations. Avoid the loop which may want to add RELATIVE relocs
2697 based on bfd_link_pic (info). */
2698 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2701 for (relent
= h
->reloc_entries
; relent
; relent
= relent
->next
)
2703 entries
= alpha_dynamic_entries_for_reloc (relent
->rtype
, dynamic
,
2704 bfd_link_pic (info
),
2705 bfd_link_pie (info
));
2708 asection
*sec
= relent
->sec
;
2709 relent
->srel
->size
+=
2710 entries
* sizeof (Elf64_External_Rela
) * relent
->count
;
2711 if ((sec
->flags
& SEC_READONLY
) != 0)
2713 info
->flags
|= DT_TEXTREL
;
2714 info
->callbacks
->minfo
2715 (_("%pB: dynamic relocation against `%pT' in "
2716 "read-only section `%pA'\n"),
2717 sec
->owner
, h
->root
.root
.root
.string
, sec
);
2725 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
2729 elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry
*h
,
2730 struct bfd_link_info
*info
)
2732 bfd_boolean dynamic
;
2733 struct alpha_elf_got_entry
*gotent
;
2734 unsigned long entries
;
2736 /* If we're using a plt for this symbol, then all of its relocations
2737 for its got entries go into .rela.plt. */
2738 if (h
->root
.needs_plt
)
2741 /* If the symbol is dynamic, we'll need all the relocations in their
2742 natural form. If this is a shared object, and it has been forced
2743 local, we'll need the same number of RELATIVE relocations. */
2744 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2746 /* If the symbol is a hidden undefined weak, then we never have any
2747 relocations. Avoid the loop which may want to add RELATIVE relocs
2748 based on bfd_link_pic (info). */
2749 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2753 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2754 if (gotent
->use_count
> 0)
2755 entries
+= alpha_dynamic_entries_for_reloc (gotent
->reloc_type
, dynamic
,
2756 bfd_link_pic (info
),
2757 bfd_link_pie (info
));
2761 asection
*srel
= elf_hash_table(info
)->srelgot
;
2762 BFD_ASSERT (srel
!= NULL
);
2763 srel
->size
+= sizeof (Elf64_External_Rela
) * entries
;
2769 /* Set the sizes of the dynamic relocation sections. */
2772 elf64_alpha_size_rela_got_section (struct bfd_link_info
*info
)
2774 unsigned long entries
;
2777 struct alpha_elf_link_hash_table
* htab
;
2779 htab
= alpha_elf_hash_table (info
);
2783 /* Shared libraries often require RELATIVE relocs, and some relocs
2784 require attention for the main application as well. */
2787 for (i
= htab
->got_list
;
2788 i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2792 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2794 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2797 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2798 if (!local_got_entries
)
2801 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2802 for (gotent
= local_got_entries
[k
];
2803 gotent
; gotent
= gotent
->next
)
2804 if (gotent
->use_count
> 0)
2805 entries
+= (alpha_dynamic_entries_for_reloc
2806 (gotent
->reloc_type
, 0, bfd_link_pic (info
),
2807 bfd_link_pie (info
)));
2811 srel
= elf_hash_table(info
)->srelgot
;
2814 BFD_ASSERT (entries
== 0);
2817 srel
->size
= sizeof (Elf64_External_Rela
) * entries
;
2819 /* Now do the non-local symbols. */
2820 alpha_elf_link_hash_traverse (htab
,
2821 elf64_alpha_size_rela_got_1
, info
);
2824 /* Set the sizes of the dynamic sections. */
2827 elf64_alpha_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2828 struct bfd_link_info
*info
)
2832 bfd_boolean relplt
, relocs
;
2833 struct alpha_elf_link_hash_table
* htab
;
2835 htab
= alpha_elf_hash_table (info
);
2839 dynobj
= elf_hash_table(info
)->dynobj
;
2840 BFD_ASSERT(dynobj
!= NULL
);
2842 if (elf_hash_table (info
)->dynamic_sections_created
)
2844 /* Set the contents of the .interp section to the interpreter. */
2845 if (bfd_link_executable (info
) && !info
->nointerp
)
2847 s
= bfd_get_linker_section (dynobj
, ".interp");
2848 BFD_ASSERT (s
!= NULL
);
2849 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2850 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2853 /* Now that we've seen all of the input files, we can decide which
2854 symbols need dynamic relocation entries and which don't. We've
2855 collected information in check_relocs that we can now apply to
2856 size the dynamic relocation sections. */
2857 alpha_elf_link_hash_traverse (htab
,
2858 elf64_alpha_calc_dynrel_sizes
, info
);
2860 elf64_alpha_size_rela_got_section (info
);
2861 elf64_alpha_size_plt_section (info
);
2863 /* else we're not dynamic and by definition we don't need such things. */
2865 /* The check_relocs and adjust_dynamic_symbol entry points have
2866 determined the sizes of the various dynamic sections. Allocate
2870 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2874 if (!(s
->flags
& SEC_LINKER_CREATED
))
2877 /* It's OK to base decisions on the section name, because none
2878 of the dynobj section names depend upon the input files. */
2879 name
= bfd_section_name (s
);
2881 if (CONST_STRNEQ (name
, ".rela"))
2885 if (strcmp (name
, ".rela.plt") == 0)
2890 /* We use the reloc_count field as a counter if we need
2891 to copy relocs into the output file. */
2895 else if (! CONST_STRNEQ (name
, ".got")
2896 && strcmp (name
, ".plt") != 0
2897 && strcmp (name
, ".dynbss") != 0)
2899 /* It's not one of our dynamic sections, so don't allocate space. */
2905 /* If we don't need this section, strip it from the output file.
2906 This is to handle .rela.bss and .rela.plt. We must create it
2907 in create_dynamic_sections, because it must be created before
2908 the linker maps input sections to output sections. The
2909 linker does that before adjust_dynamic_symbol is called, and
2910 it is that function which decides whether anything needs to
2911 go into these sections. */
2912 if (!CONST_STRNEQ (name
, ".got"))
2913 s
->flags
|= SEC_EXCLUDE
;
2915 else if ((s
->flags
& SEC_HAS_CONTENTS
) != 0)
2917 /* Allocate memory for the section contents. */
2918 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2919 if (s
->contents
== NULL
)
2924 if (elf_hash_table (info
)->dynamic_sections_created
)
2926 /* Add some entries to the .dynamic section. We fill in the
2927 values later, in elf64_alpha_finish_dynamic_sections, but we
2928 must add the entries now so that we get the correct size for
2929 the .dynamic section. The DT_DEBUG entry is filled in by the
2930 dynamic linker and used by the debugger. */
2931 #define add_dynamic_entry(TAG, VAL) \
2932 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2934 if (bfd_link_executable (info
))
2936 if (!add_dynamic_entry (DT_DEBUG
, 0))
2942 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2943 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2944 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2945 || !add_dynamic_entry (DT_JMPREL
, 0))
2948 if (elf64_alpha_use_secureplt
2949 && !add_dynamic_entry (DT_ALPHA_PLTRO
, 1))
2955 if (!add_dynamic_entry (DT_RELA
, 0)
2956 || !add_dynamic_entry (DT_RELASZ
, 0)
2957 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2960 if (info
->flags
& DF_TEXTREL
)
2962 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2967 #undef add_dynamic_entry
2972 /* These functions do relaxation for Alpha ELF.
2974 Currently I'm only handling what I can do with existing compiler
2975 and assembler support, which means no instructions are removed,
2976 though some may be nopped. At this time GCC does not emit enough
2977 information to do all of the relaxing that is possible. It will
2978 take some not small amount of work for that to happen.
2980 There are a couple of interesting papers that I once read on this
2981 subject, that I cannot find references to at the moment, that
2982 related to Alpha in particular. They are by David Wall, then of
2985 struct alpha_relax_info
2990 Elf_Internal_Shdr
*symtab_hdr
;
2991 Elf_Internal_Rela
*relocs
, *relend
;
2992 struct bfd_link_info
*link_info
;
2996 struct alpha_elf_link_hash_entry
*h
;
2997 struct alpha_elf_got_entry
**first_gotent
;
2998 struct alpha_elf_got_entry
*gotent
;
2999 bfd_boolean changed_contents
;
3000 bfd_boolean changed_relocs
;
3001 unsigned char other
;
3004 static Elf_Internal_Rela
*
3005 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela
*rel
,
3006 Elf_Internal_Rela
*relend
,
3007 bfd_vma offset
, int type
)
3009 while (rel
< relend
)
3011 if (rel
->r_offset
== offset
3012 && ELF64_R_TYPE (rel
->r_info
) == (unsigned int) type
)
3020 elf64_alpha_relax_got_load (struct alpha_relax_info
*info
, bfd_vma symval
,
3021 Elf_Internal_Rela
*irel
, unsigned long r_type
)
3024 bfd_signed_vma disp
;
3026 /* Get the instruction. */
3027 insn
= bfd_get_32 (info
->abfd
, info
->contents
+ irel
->r_offset
);
3029 if (insn
>> 26 != OP_LDQ
)
3031 reloc_howto_type
*howto
= elf64_alpha_howto_table
+ r_type
;
3033 /* xgettext:c-format */
3034 (_("%pB: %pA+%#" PRIx64
": warning: "
3035 "%s relocation against unexpected insn"),
3036 info
->abfd
, info
->sec
, (uint64_t) irel
->r_offset
, howto
->name
);
3040 /* Can't relax dynamic symbols. */
3041 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3044 /* Can't use local-exec relocations in shared libraries. */
3045 if (r_type
== R_ALPHA_GOTTPREL
3046 && bfd_link_dll (info
->link_info
))
3049 if (r_type
== R_ALPHA_LITERAL
)
3051 /* Look for nice constant addresses. This includes the not-uncommon
3052 special case of 0 for undefweak symbols. */
3053 if ((info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3054 || (!bfd_link_pic (info
->link_info
)
3055 && (symval
>= (bfd_vma
)-0x8000 || symval
< 0x8000)))
3058 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3059 insn
|= (symval
& 0xffff);
3060 r_type
= R_ALPHA_NONE
;
3064 /* We may only create GPREL relocs during the second pass. */
3065 if (info
->link_info
->relax_pass
== 0)
3068 disp
= symval
- info
->gp
;
3069 insn
= (OP_LDA
<< 26) | (insn
& 0x03ff0000);
3070 r_type
= R_ALPHA_GPREL16
;
3075 bfd_vma dtp_base
, tp_base
;
3077 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3078 dtp_base
= alpha_get_dtprel_base (info
->link_info
);
3079 tp_base
= alpha_get_tprel_base (info
->link_info
);
3080 disp
= symval
- (r_type
== R_ALPHA_GOTDTPREL
? dtp_base
: tp_base
);
3082 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3086 case R_ALPHA_GOTDTPREL
:
3087 r_type
= R_ALPHA_DTPREL16
;
3089 case R_ALPHA_GOTTPREL
:
3090 r_type
= R_ALPHA_TPREL16
;
3098 if (disp
< -0x8000 || disp
>= 0x8000)
3101 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, info
->contents
+ irel
->r_offset
);
3102 info
->changed_contents
= TRUE
;
3104 /* Reduce the use count on this got entry by one, possibly
3106 if (--info
->gotent
->use_count
== 0)
3108 int sz
= alpha_got_entry_size (r_type
);
3109 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3111 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3114 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3115 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
), r_type
);
3116 info
->changed_relocs
= TRUE
;
3118 /* ??? Search forward through this basic block looking for insns
3119 that use the target register. Stop after an insn modifying the
3120 register is seen, or after a branch or call.
3122 Any such memory load insn may be substituted by a load directly
3123 off the GP. This allows the memory load insn to be issued before
3124 the calculated GP register would otherwise be ready.
3126 Any such jsr insn can be replaced by a bsr if it is in range.
3128 This would mean that we'd have to _add_ relocations, the pain of
3129 which gives one pause. */
3135 elf64_alpha_relax_opt_call (struct alpha_relax_info
*info
, bfd_vma symval
)
3137 /* If the function has the same gp, and we can identify that the
3138 function does not use its function pointer, we can eliminate the
3141 /* If the symbol is marked NOPV, we are being told the function never
3142 needs its procedure value. */
3143 if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_NOPV
)
3146 /* If the symbol is marked STD_GP, we are being told the function does
3147 a normal ldgp in the first two words. */
3148 else if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_STD_GPLOAD
)
3151 /* Otherwise, we may be able to identify a GP load in the first two
3152 words, which we can then skip. */
3155 Elf_Internal_Rela
*tsec_relocs
, *tsec_relend
, *tsec_free
, *gpdisp
;
3158 /* Load the relocations from the section that the target symbol is in. */
3159 if (info
->sec
== info
->tsec
)
3161 tsec_relocs
= info
->relocs
;
3162 tsec_relend
= info
->relend
;
3167 tsec_relocs
= (_bfd_elf_link_read_relocs
3168 (info
->abfd
, info
->tsec
, NULL
,
3169 (Elf_Internal_Rela
*) NULL
,
3170 info
->link_info
->keep_memory
));
3171 if (tsec_relocs
== NULL
)
3173 tsec_relend
= tsec_relocs
+ info
->tsec
->reloc_count
;
3174 tsec_free
= (elf_section_data (info
->tsec
)->relocs
== tsec_relocs
3179 /* Recover the symbol's offset within the section. */
3180 ofs
= (symval
- info
->tsec
->output_section
->vma
3181 - info
->tsec
->output_offset
);
3183 /* Look for a GPDISP reloc. */
3184 gpdisp
= (elf64_alpha_find_reloc_at_ofs
3185 (tsec_relocs
, tsec_relend
, ofs
, R_ALPHA_GPDISP
));
3187 if (!gpdisp
|| gpdisp
->r_addend
!= 4)
3197 /* We've now determined that we can skip an initial gp load. Verify
3198 that the call and the target use the same gp. */
3199 if (info
->link_info
->output_bfd
->xvec
!= info
->tsec
->owner
->xvec
3200 || info
->gotobj
!= alpha_elf_tdata (info
->tsec
->owner
)->gotobj
)
3207 elf64_alpha_relax_with_lituse (struct alpha_relax_info
*info
,
3208 bfd_vma symval
, Elf_Internal_Rela
*irel
)
3210 Elf_Internal_Rela
*urel
, *erel
, *irelend
= info
->relend
;
3212 bfd_signed_vma disp
;
3215 bfd_boolean lit_reused
= FALSE
;
3216 bfd_boolean all_optimized
= TRUE
;
3217 bfd_boolean changed_contents
;
3218 bfd_boolean changed_relocs
;
3219 bfd_byte
*contents
= info
->contents
;
3220 bfd
*abfd
= info
->abfd
;
3221 bfd_vma sec_output_vma
;
3222 unsigned int lit_insn
;
3225 lit_insn
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
3226 if (lit_insn
>> 26 != OP_LDQ
)
3229 /* xgettext:c-format */
3230 (_("%pB: %pA+%#" PRIx64
": warning: "
3231 "%s relocation against unexpected insn"),
3232 abfd
, info
->sec
, (uint64_t) irel
->r_offset
, "LITERAL");
3236 /* Can't relax dynamic symbols. */
3237 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3240 changed_contents
= info
->changed_contents
;
3241 changed_relocs
= info
->changed_relocs
;
3242 sec_output_vma
= info
->sec
->output_section
->vma
+ info
->sec
->output_offset
;
3243 relax_pass
= info
->link_info
->relax_pass
;
3245 /* Summarize how this particular LITERAL is used. */
3246 for (erel
= irel
+1, flags
= 0; erel
< irelend
; ++erel
)
3248 if (ELF64_R_TYPE (erel
->r_info
) != R_ALPHA_LITUSE
)
3250 if (erel
->r_addend
<= 6)
3251 flags
|= 1 << erel
->r_addend
;
3254 /* A little preparation for the loop... */
3255 disp
= symval
- info
->gp
;
3257 for (urel
= irel
+1; urel
< erel
; ++urel
)
3259 bfd_vma urel_r_offset
= urel
->r_offset
;
3262 bfd_signed_vma xdisp
;
3263 Elf_Internal_Rela nrel
;
3265 insn
= bfd_get_32 (abfd
, contents
+ urel_r_offset
);
3267 switch (urel
->r_addend
)
3269 case LITUSE_ALPHA_ADDR
:
3271 /* This type is really just a placeholder to note that all
3272 uses cannot be optimized, but to still allow some. */
3273 all_optimized
= FALSE
;
3276 case LITUSE_ALPHA_BASE
:
3277 /* We may only create GPREL relocs during the second pass. */
3278 if (relax_pass
== 0)
3280 all_optimized
= FALSE
;
3284 /* We can always optimize 16-bit displacements. */
3286 /* Extract the displacement from the instruction, sign-extending
3287 it if necessary, then test whether it is within 16 or 32 bits
3288 displacement from GP. */
3289 insn_disp
= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
3291 xdisp
= disp
+ insn_disp
;
3292 fits16
= (xdisp
>= - (bfd_signed_vma
) 0x8000 && xdisp
< 0x8000);
3293 fits32
= (xdisp
>= - (bfd_signed_vma
) 0x80000000
3294 && xdisp
< 0x7fff8000);
3298 /* Take the op code and dest from this insn, take the base
3299 register from the literal insn. Leave the offset alone. */
3300 insn
= (insn
& 0xffe0ffff) | (lit_insn
& 0x001f0000);
3301 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3302 changed_contents
= TRUE
;
3305 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3307 nrel
.r_addend
= irel
->r_addend
;
3309 /* As we adjust, move the reloc to the end so that we don't
3310 break the LITERAL+LITUSE chain. */
3314 changed_relocs
= TRUE
;
3317 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3318 else if (fits32
&& !(flags
& ~6))
3320 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3322 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3324 lit_insn
= (OP_LDAH
<< 26) | (lit_insn
& 0x03ff0000);
3325 bfd_put_32 (abfd
, (bfd_vma
) lit_insn
, contents
+ irel
->r_offset
);
3327 changed_contents
= TRUE
;
3329 /* Since all relocs must be optimized, don't bother swapping
3330 this relocation to the end. */
3331 urel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3333 urel
->r_addend
= irel
->r_addend
;
3334 changed_relocs
= TRUE
;
3337 all_optimized
= FALSE
;
3340 case LITUSE_ALPHA_BYTOFF
:
3341 /* We can always optimize byte instructions. */
3343 /* FIXME: sanity check the insn for byte op. Check that the
3344 literal dest reg is indeed Rb in the byte insn. */
3346 insn
&= ~ (unsigned) 0x001ff000;
3347 insn
|= ((symval
& 7) << 13) | 0x1000;
3348 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3349 changed_contents
= TRUE
;
3352 nrel
.r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3355 /* As we adjust, move the reloc to the end so that we don't
3356 break the LITERAL+LITUSE chain. */
3360 changed_relocs
= TRUE
;
3363 case LITUSE_ALPHA_JSR
:
3364 case LITUSE_ALPHA_TLSGD
:
3365 case LITUSE_ALPHA_TLSLDM
:
3366 case LITUSE_ALPHA_JSRDIRECT
:
3368 bfd_vma optdest
, org
;
3369 bfd_signed_vma odisp
;
3371 /* For undefined weak symbols, we're mostly interested in getting
3372 rid of the got entry whenever possible, so optimize this to a
3373 use of the zero register. */
3374 if (info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3377 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3379 changed_contents
= TRUE
;
3383 /* If not zero, place to jump without needing pv. */
3384 optdest
= elf64_alpha_relax_opt_call (info
, symval
);
3385 org
= sec_output_vma
+ urel_r_offset
+ 4;
3386 odisp
= (optdest
? optdest
: symval
) - org
;
3388 if (odisp
>= -0x400000 && odisp
< 0x400000)
3390 Elf_Internal_Rela
*xrel
;
3392 /* Preserve branch prediction call stack when possible. */
3393 if ((insn
& INSN_JSR_MASK
) == INSN_JSR
)
3394 insn
= (OP_BSR
<< 26) | (insn
& 0x03e00000);
3396 insn
= (OP_BR
<< 26) | (insn
& 0x03e00000);
3397 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3398 changed_contents
= TRUE
;
3401 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3403 nrel
.r_addend
= irel
->r_addend
;
3406 nrel
.r_addend
+= optdest
- symval
;
3408 all_optimized
= FALSE
;
3410 /* Kill any HINT reloc that might exist for this insn. */
3411 xrel
= (elf64_alpha_find_reloc_at_ofs
3412 (info
->relocs
, info
->relend
, urel_r_offset
,
3415 xrel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3417 /* As we adjust, move the reloc to the end so that we don't
3418 break the LITERAL+LITUSE chain. */
3423 info
->changed_relocs
= TRUE
;
3426 all_optimized
= FALSE
;
3428 /* Even if the target is not in range for a direct branch,
3429 if we share a GP, we can eliminate the gp reload. */
3432 Elf_Internal_Rela
*gpdisp
3433 = (elf64_alpha_find_reloc_at_ofs
3434 (info
->relocs
, irelend
, urel_r_offset
+ 4,
3438 bfd_byte
*p_ldah
= contents
+ gpdisp
->r_offset
;
3439 bfd_byte
*p_lda
= p_ldah
+ gpdisp
->r_addend
;
3440 unsigned int ldah
= bfd_get_32 (abfd
, p_ldah
);
3441 unsigned int lda
= bfd_get_32 (abfd
, p_lda
);
3443 /* Verify that the instruction is "ldah $29,0($26)".
3444 Consider a function that ends in a noreturn call,
3445 and that the next function begins with an ldgp,
3446 and that by accident there is no padding between.
3447 In that case the insn would use $27 as the base. */
3448 if (ldah
== 0x27ba0000 && lda
== 0x23bd0000)
3450 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_ldah
);
3451 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_lda
);
3453 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3454 changed_contents
= TRUE
;
3455 changed_relocs
= TRUE
;
3464 /* If we reused the literal instruction, we must have optimized all. */
3465 BFD_ASSERT(!lit_reused
|| all_optimized
);
3467 /* If all cases were optimized, we can reduce the use count on this
3468 got entry by one, possibly eliminating it. */
3471 if (--info
->gotent
->use_count
== 0)
3473 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3474 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3476 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3479 /* If the literal instruction is no longer needed (it may have been
3480 reused. We can eliminate it. */
3481 /* ??? For now, I don't want to deal with compacting the section,
3482 so just nop it out. */
3485 irel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3486 changed_relocs
= TRUE
;
3488 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, contents
+ irel
->r_offset
);
3489 changed_contents
= TRUE
;
3493 info
->changed_contents
= changed_contents
;
3494 info
->changed_relocs
= changed_relocs
;
3496 if (all_optimized
|| relax_pass
== 0)
3498 return elf64_alpha_relax_got_load (info
, symval
, irel
, R_ALPHA_LITERAL
);
3502 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info
*info
, bfd_vma symval
,
3503 Elf_Internal_Rela
*irel
, bfd_boolean is_gd
)
3506 unsigned int insn
, tlsgd_reg
;
3507 Elf_Internal_Rela
*gpdisp
, *hint
;
3508 bfd_boolean dynamic
, use_gottprel
;
3509 unsigned long new_symndx
;
3511 dynamic
= alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
);
3513 /* If a TLS symbol is accessed using IE at least once, there is no point
3514 to use dynamic model for it. */
3515 if (is_gd
&& info
->h
&& (info
->h
->flags
& ALPHA_ELF_LINK_HASH_TLS_IE
))
3518 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3519 then we might as well relax to IE. */
3520 else if (bfd_link_pic (info
->link_info
) && !dynamic
3521 && (info
->link_info
->flags
& DF_STATIC_TLS
))
3524 /* Otherwise we must be building an executable to do anything. */
3525 else if (bfd_link_pic (info
->link_info
))
3528 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3529 the matching LITUSE_TLS relocations. */
3530 if (irel
+ 2 >= info
->relend
)
3532 if (ELF64_R_TYPE (irel
[1].r_info
) != R_ALPHA_LITERAL
3533 || ELF64_R_TYPE (irel
[2].r_info
) != R_ALPHA_LITUSE
3534 || irel
[2].r_addend
!= (is_gd
? LITUSE_ALPHA_TLSGD
: LITUSE_ALPHA_TLSLDM
))
3537 /* There must be a GPDISP relocation positioned immediately after the
3538 LITUSE relocation. */
3539 gpdisp
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3540 irel
[2].r_offset
+ 4, R_ALPHA_GPDISP
);
3544 pos
[0] = info
->contents
+ irel
[0].r_offset
;
3545 pos
[1] = info
->contents
+ irel
[1].r_offset
;
3546 pos
[2] = info
->contents
+ irel
[2].r_offset
;
3547 pos
[3] = info
->contents
+ gpdisp
->r_offset
;
3548 pos
[4] = pos
[3] + gpdisp
->r_addend
;
3550 /* Beware of the compiler hoisting part of the sequence out a loop
3551 and adjusting the destination register for the TLSGD insn. If this
3552 happens, there will be a move into $16 before the JSR insn, so only
3553 transformations of the first insn pair should use this register. */
3554 tlsgd_reg
= bfd_get_32 (info
->abfd
, pos
[0]);
3555 tlsgd_reg
= (tlsgd_reg
>> 21) & 31;
3557 /* Generally, the positions are not allowed to be out of order, lest the
3558 modified insn sequence have different register lifetimes. We can make
3559 an exception when pos 1 is adjacent to pos 0. */
3560 if (pos
[1] + 4 == pos
[0])
3562 bfd_byte
*tmp
= pos
[0];
3566 if (pos
[1] >= pos
[2] || pos
[2] >= pos
[3])
3569 /* Reduce the use count on the LITERAL relocation. Do this before we
3570 smash the symndx when we adjust the relocations below. */
3572 struct alpha_elf_got_entry
*lit_gotent
;
3573 struct alpha_elf_link_hash_entry
*lit_h
;
3576 BFD_ASSERT (ELF64_R_SYM (irel
[1].r_info
) >= info
->symtab_hdr
->sh_info
);
3577 indx
= ELF64_R_SYM (irel
[1].r_info
) - info
->symtab_hdr
->sh_info
;
3578 lit_h
= alpha_elf_sym_hashes (info
->abfd
)[indx
];
3580 while (lit_h
->root
.root
.type
== bfd_link_hash_indirect
3581 || lit_h
->root
.root
.type
== bfd_link_hash_warning
)
3582 lit_h
= (struct alpha_elf_link_hash_entry
*) lit_h
->root
.root
.u
.i
.link
;
3584 for (lit_gotent
= lit_h
->got_entries
; lit_gotent
;
3585 lit_gotent
= lit_gotent
->next
)
3586 if (lit_gotent
->gotobj
== info
->gotobj
3587 && lit_gotent
->reloc_type
== R_ALPHA_LITERAL
3588 && lit_gotent
->addend
== irel
[1].r_addend
)
3590 BFD_ASSERT (lit_gotent
);
3592 if (--lit_gotent
->use_count
== 0)
3594 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3595 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3601 lda $16,x($gp) !tlsgd!1
3602 ldq $27,__tls_get_addr($gp) !literal!1
3603 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3604 ldah $29,0($26) !gpdisp!2
3605 lda $29,0($29) !gpdisp!2
3607 ldq $16,x($gp) !gottprel
3612 or the first pair to
3613 lda $16,x($gp) !tprel
3616 ldah $16,x($gp) !tprelhi
3617 lda $16,x($16) !tprello
3621 use_gottprel
= FALSE
;
3622 new_symndx
= is_gd
? ELF64_R_SYM (irel
->r_info
) : STN_UNDEF
;
3624 /* Some compilers warn about a Boolean-looking expression being
3625 used in a switch. The explicit cast silences them. */
3626 switch ((int) (!dynamic
&& !bfd_link_pic (info
->link_info
)))
3631 bfd_signed_vma disp
;
3633 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3634 tp_base
= alpha_get_tprel_base (info
->link_info
);
3635 disp
= symval
- tp_base
;
3637 if (disp
>= -0x8000 && disp
< 0x8000)
3639 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3640 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3641 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3643 irel
[0].r_offset
= pos
[0] - info
->contents
;
3644 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPREL16
);
3645 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3648 else if (disp
>= -(bfd_signed_vma
) 0x80000000
3649 && disp
< (bfd_signed_vma
) 0x7fff8000
3650 && pos
[0] + 4 == pos
[1])
3652 insn
= (OP_LDAH
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3653 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3654 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (tlsgd_reg
<< 16);
3655 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[1]);
3657 irel
[0].r_offset
= pos
[0] - info
->contents
;
3658 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELHI
);
3659 irel
[1].r_offset
= pos
[1] - info
->contents
;
3660 irel
[1].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELLO
);
3667 use_gottprel
= TRUE
;
3669 insn
= (OP_LDQ
<< 26) | (tlsgd_reg
<< 21) | (29 << 16);
3670 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3671 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3673 irel
[0].r_offset
= pos
[0] - info
->contents
;
3674 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_GOTTPREL
);
3675 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3679 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_RDUNIQ
, pos
[2]);
3681 insn
= INSN_ADDQ
| (16 << 21) | (0 << 16) | (0 << 0);
3682 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[3]);
3684 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[4]);
3686 irel
[2].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3687 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3689 hint
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3690 irel
[2].r_offset
, R_ALPHA_HINT
);
3692 hint
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3694 info
->changed_contents
= TRUE
;
3695 info
->changed_relocs
= TRUE
;
3697 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3698 if (--info
->gotent
->use_count
== 0)
3700 int sz
= alpha_got_entry_size (info
->gotent
->reloc_type
);
3701 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3703 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3706 /* If we've switched to a GOTTPREL relocation, increment the reference
3707 count on that got entry. */
3710 struct alpha_elf_got_entry
*tprel_gotent
;
3712 for (tprel_gotent
= *info
->first_gotent
; tprel_gotent
;
3713 tprel_gotent
= tprel_gotent
->next
)
3714 if (tprel_gotent
->gotobj
== info
->gotobj
3715 && tprel_gotent
->reloc_type
== R_ALPHA_GOTTPREL
3716 && tprel_gotent
->addend
== irel
->r_addend
)
3719 tprel_gotent
->use_count
++;
3722 if (info
->gotent
->use_count
== 0)
3723 tprel_gotent
= info
->gotent
;
3726 tprel_gotent
= (struct alpha_elf_got_entry
*)
3727 bfd_alloc (info
->abfd
, sizeof (struct alpha_elf_got_entry
));
3731 tprel_gotent
->next
= *info
->first_gotent
;
3732 *info
->first_gotent
= tprel_gotent
;
3734 tprel_gotent
->gotobj
= info
->gotobj
;
3735 tprel_gotent
->addend
= irel
->r_addend
;
3736 tprel_gotent
->got_offset
= -1;
3737 tprel_gotent
->reloc_done
= 0;
3738 tprel_gotent
->reloc_xlated
= 0;
3741 tprel_gotent
->use_count
= 1;
3742 tprel_gotent
->reloc_type
= R_ALPHA_GOTTPREL
;
3750 elf64_alpha_relax_section (bfd
*abfd
, asection
*sec
,
3751 struct bfd_link_info
*link_info
, bfd_boolean
*again
)
3753 Elf_Internal_Shdr
*symtab_hdr
;
3754 Elf_Internal_Rela
*internal_relocs
;
3755 Elf_Internal_Rela
*irel
, *irelend
;
3756 Elf_Internal_Sym
*isymbuf
= NULL
;
3757 struct alpha_elf_got_entry
**local_got_entries
;
3758 struct alpha_relax_info info
;
3759 struct alpha_elf_link_hash_table
* htab
;
3762 htab
= alpha_elf_hash_table (link_info
);
3766 /* There's nothing to change, yet. */
3769 if (bfd_link_relocatable (link_info
)
3770 || ((sec
->flags
& (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3771 != (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3772 || sec
->reloc_count
== 0)
3775 BFD_ASSERT (is_alpha_elf (abfd
));
3776 relax_pass
= link_info
->relax_pass
;
3778 /* Make sure our GOT and PLT tables are up-to-date. */
3779 if (htab
->relax_trip
!= link_info
->relax_trip
)
3781 htab
->relax_trip
= link_info
->relax_trip
;
3783 /* This should never fail after the initial round, since the only error
3784 is GOT overflow, and relaxation only shrinks the table. However, we
3785 may only merge got sections during the first pass. If we merge
3786 sections after we've created GPREL relocs, the GP for the merged
3787 section backs up which may put the relocs out of range. */
3788 if (!elf64_alpha_size_got_sections (link_info
, relax_pass
== 0))
3790 if (elf_hash_table (link_info
)->dynamic_sections_created
)
3792 elf64_alpha_size_plt_section (link_info
);
3793 elf64_alpha_size_rela_got_section (link_info
);
3797 symtab_hdr
= &elf_symtab_hdr (abfd
);
3798 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
3800 /* Load the relocations for this section. */
3801 internal_relocs
= (_bfd_elf_link_read_relocs
3802 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3803 link_info
->keep_memory
));
3804 if (internal_relocs
== NULL
)
3807 memset(&info
, 0, sizeof (info
));
3810 info
.link_info
= link_info
;
3811 info
.symtab_hdr
= symtab_hdr
;
3812 info
.relocs
= internal_relocs
;
3813 info
.relend
= irelend
= internal_relocs
+ sec
->reloc_count
;
3815 /* Find the GP for this object. Do not store the result back via
3816 _bfd_set_gp_value, since this could change again before final. */
3817 info
.gotobj
= alpha_elf_tdata (abfd
)->gotobj
;
3820 asection
*sgot
= alpha_elf_tdata (info
.gotobj
)->got
;
3821 info
.gp
= (sgot
->output_section
->vma
3822 + sgot
->output_offset
3826 /* Get the section contents. */
3827 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3828 info
.contents
= elf_section_data (sec
)->this_hdr
.contents
;
3831 if (!bfd_malloc_and_get_section (abfd
, sec
, &info
.contents
))
3835 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3838 struct alpha_elf_got_entry
*gotent
;
3839 unsigned long r_type
= ELF64_R_TYPE (irel
->r_info
);
3840 unsigned long r_symndx
= ELF64_R_SYM (irel
->r_info
);
3842 /* Early exit for unhandled or unrelaxable relocations. */
3843 if (r_type
!= R_ALPHA_LITERAL
)
3845 /* We complete everything except LITERAL in the first pass. */
3846 if (relax_pass
!= 0)
3848 if (r_type
== R_ALPHA_TLSLDM
)
3850 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3851 reloc to the STN_UNDEF (0) symbol so that they all match. */
3852 r_symndx
= STN_UNDEF
;
3854 else if (r_type
!= R_ALPHA_GOTDTPREL
3855 && r_type
!= R_ALPHA_GOTTPREL
3856 && r_type
!= R_ALPHA_TLSGD
)
3860 /* Get the value of the symbol referred to by the reloc. */
3861 if (r_symndx
< symtab_hdr
->sh_info
)
3863 /* A local symbol. */
3864 Elf_Internal_Sym
*isym
;
3866 /* Read this BFD's local symbols. */
3867 if (isymbuf
== NULL
)
3869 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3870 if (isymbuf
== NULL
)
3871 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
3872 symtab_hdr
->sh_info
, 0,
3874 if (isymbuf
== NULL
)
3878 isym
= isymbuf
+ r_symndx
;
3880 /* Given the symbol for a TLSLDM reloc is ignored, this also
3881 means forcing the symbol value to the tp base. */
3882 if (r_type
== R_ALPHA_TLSLDM
)
3884 info
.tsec
= bfd_abs_section_ptr
;
3885 symval
= alpha_get_tprel_base (info
.link_info
);
3889 symval
= isym
->st_value
;
3890 if (isym
->st_shndx
== SHN_UNDEF
)
3892 else if (isym
->st_shndx
== SHN_ABS
)
3893 info
.tsec
= bfd_abs_section_ptr
;
3894 else if (isym
->st_shndx
== SHN_COMMON
)
3895 info
.tsec
= bfd_com_section_ptr
;
3897 info
.tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3901 info
.other
= isym
->st_other
;
3902 if (local_got_entries
)
3903 info
.first_gotent
= &local_got_entries
[r_symndx
];
3906 info
.first_gotent
= &info
.gotent
;
3913 struct alpha_elf_link_hash_entry
*h
;
3915 indx
= r_symndx
- symtab_hdr
->sh_info
;
3916 h
= alpha_elf_sym_hashes (abfd
)[indx
];
3917 BFD_ASSERT (h
!= NULL
);
3919 while (h
->root
.root
.type
== bfd_link_hash_indirect
3920 || h
->root
.root
.type
== bfd_link_hash_warning
)
3921 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
3923 /* If the symbol is undefined, we can't do anything with it. */
3924 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
3927 /* If the symbol isn't defined in the current module,
3928 again we can't do anything. */
3929 if (h
->root
.root
.type
== bfd_link_hash_undefweak
)
3931 info
.tsec
= bfd_abs_section_ptr
;
3934 else if (!h
->root
.def_regular
)
3936 /* Except for TLSGD relocs, which can sometimes be
3937 relaxed to GOTTPREL relocs. */
3938 if (r_type
!= R_ALPHA_TLSGD
)
3940 info
.tsec
= bfd_abs_section_ptr
;
3945 info
.tsec
= h
->root
.root
.u
.def
.section
;
3946 symval
= h
->root
.root
.u
.def
.value
;
3950 info
.other
= h
->root
.other
;
3951 info
.first_gotent
= &h
->got_entries
;
3954 /* Search for the got entry to be used by this relocation. */
3955 for (gotent
= *info
.first_gotent
; gotent
; gotent
= gotent
->next
)
3956 if (gotent
->gotobj
== info
.gotobj
3957 && gotent
->reloc_type
== r_type
3958 && gotent
->addend
== irel
->r_addend
)
3960 info
.gotent
= gotent
;
3962 symval
+= info
.tsec
->output_section
->vma
+ info
.tsec
->output_offset
;
3963 symval
+= irel
->r_addend
;
3967 case R_ALPHA_LITERAL
:
3968 BFD_ASSERT(info
.gotent
!= NULL
);
3970 /* If there exist LITUSE relocations immediately following, this
3971 opens up all sorts of interesting optimizations, because we
3972 now know every location that this address load is used. */
3973 if (irel
+1 < irelend
3974 && ELF64_R_TYPE (irel
[1].r_info
) == R_ALPHA_LITUSE
)
3976 if (!elf64_alpha_relax_with_lituse (&info
, symval
, irel
))
3981 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3986 case R_ALPHA_GOTDTPREL
:
3987 case R_ALPHA_GOTTPREL
:
3988 BFD_ASSERT(info
.gotent
!= NULL
);
3989 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3994 case R_ALPHA_TLSLDM
:
3995 BFD_ASSERT(info
.gotent
!= NULL
);
3996 if (!elf64_alpha_relax_tls_get_addr (&info
, symval
, irel
,
3997 r_type
== R_ALPHA_TLSGD
))
4004 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4006 if (!link_info
->keep_memory
)
4010 /* Cache the symbols for elf_link_input_bfd. */
4011 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
4015 if (info
.contents
!= NULL
4016 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4018 if (!info
.changed_contents
&& !link_info
->keep_memory
)
4019 free (info
.contents
);
4022 /* Cache the section contents for elf_link_input_bfd. */
4023 elf_section_data (sec
)->this_hdr
.contents
= info
.contents
;
4027 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
4029 if (!info
.changed_relocs
)
4030 free (internal_relocs
);
4032 elf_section_data (sec
)->relocs
= internal_relocs
;
4035 *again
= info
.changed_contents
|| info
.changed_relocs
;
4041 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4043 if (info
.contents
!= NULL
4044 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4045 free (info
.contents
);
4046 if (internal_relocs
!= NULL
4047 && elf_section_data (sec
)->relocs
!= internal_relocs
)
4048 free (internal_relocs
);
4052 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4053 into the next available slot in SREL. */
4056 elf64_alpha_emit_dynrel (bfd
*abfd
, struct bfd_link_info
*info
,
4057 asection
*sec
, asection
*srel
, bfd_vma offset
,
4058 long dynindx
, long rtype
, bfd_vma addend
)
4060 Elf_Internal_Rela outrel
;
4063 BFD_ASSERT (srel
!= NULL
);
4065 outrel
.r_info
= ELF64_R_INFO (dynindx
, rtype
);
4066 outrel
.r_addend
= addend
;
4068 offset
= _bfd_elf_section_offset (abfd
, info
, sec
, offset
);
4069 if ((offset
| 1) != (bfd_vma
) -1)
4070 outrel
.r_offset
= sec
->output_section
->vma
+ sec
->output_offset
+ offset
;
4072 memset (&outrel
, 0, sizeof (outrel
));
4074 loc
= srel
->contents
;
4075 loc
+= srel
->reloc_count
++ * sizeof (Elf64_External_Rela
);
4076 bfd_elf64_swap_reloca_out (abfd
, &outrel
, loc
);
4077 BFD_ASSERT (sizeof (Elf64_External_Rela
) * srel
->reloc_count
<= srel
->size
);
4080 /* Relocate an Alpha ELF section for a relocatable link.
4082 We don't have to change anything unless the reloc is against a section
4083 symbol, in which case we have to adjust according to where the section
4084 symbol winds up in the output section. */
4087 elf64_alpha_relocate_section_r (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4088 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4089 bfd
*input_bfd
, asection
*input_section
,
4090 bfd_byte
*contents ATTRIBUTE_UNUSED
,
4091 Elf_Internal_Rela
*relocs
,
4092 Elf_Internal_Sym
*local_syms
,
4093 asection
**local_sections
)
4095 unsigned long symtab_hdr_sh_info
;
4096 Elf_Internal_Rela
*rel
;
4097 Elf_Internal_Rela
*relend
;
4098 struct elf_link_hash_entry
**sym_hashes
;
4099 bfd_boolean ret_val
= TRUE
;
4101 symtab_hdr_sh_info
= elf_symtab_hdr (input_bfd
).sh_info
;
4102 sym_hashes
= elf_sym_hashes (input_bfd
);
4104 relend
= relocs
+ input_section
->reloc_count
;
4105 for (rel
= relocs
; rel
< relend
; rel
++)
4107 unsigned long r_symndx
;
4108 Elf_Internal_Sym
*sym
;
4110 unsigned long r_type
;
4112 r_type
= ELF64_R_TYPE (rel
->r_info
);
4113 if (r_type
>= R_ALPHA_max
)
4116 /* xgettext:c-format */
4117 (_("%pB: unsupported relocation type %#x"),
4118 input_bfd
, (int) r_type
);
4119 bfd_set_error (bfd_error_bad_value
);
4124 /* The symbol associated with GPDISP and LITUSE is
4125 immaterial. Only the addend is significant. */
4126 if (r_type
== R_ALPHA_GPDISP
|| r_type
== R_ALPHA_LITUSE
)
4129 r_symndx
= ELF64_R_SYM (rel
->r_info
);
4130 if (r_symndx
< symtab_hdr_sh_info
)
4132 sym
= local_syms
+ r_symndx
;
4133 sec
= local_sections
[r_symndx
];
4137 struct elf_link_hash_entry
*h
;
4139 h
= sym_hashes
[r_symndx
- symtab_hdr_sh_info
];
4141 while (h
->root
.type
== bfd_link_hash_indirect
4142 || h
->root
.type
== bfd_link_hash_warning
)
4143 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4145 if (h
->root
.type
!= bfd_link_hash_defined
4146 && h
->root
.type
!= bfd_link_hash_defweak
)
4150 sec
= h
->root
.u
.def
.section
;
4153 if (sec
!= NULL
&& discarded_section (sec
))
4154 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4156 elf64_alpha_howto_table
+ r_type
, 0,
4159 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
4160 rel
->r_addend
+= sec
->output_offset
;
4166 /* Relocate an Alpha ELF section. */
4169 elf64_alpha_relocate_section (bfd
*output_bfd
, struct bfd_link_info
*info
,
4170 bfd
*input_bfd
, asection
*input_section
,
4171 bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
4172 Elf_Internal_Sym
*local_syms
,
4173 asection
**local_sections
)
4175 Elf_Internal_Shdr
*symtab_hdr
;
4176 Elf_Internal_Rela
*rel
;
4177 Elf_Internal_Rela
*relend
;
4178 asection
*sgot
, *srel
, *srelgot
;
4179 bfd
*dynobj
, *gotobj
;
4180 bfd_vma gp
, tp_base
, dtp_base
;
4181 struct alpha_elf_got_entry
**local_got_entries
;
4182 bfd_boolean ret_val
;
4184 BFD_ASSERT (is_alpha_elf (input_bfd
));
4186 /* Handle relocatable links with a smaller loop. */
4187 if (bfd_link_relocatable (info
))
4188 return elf64_alpha_relocate_section_r (output_bfd
, info
, input_bfd
,
4189 input_section
, contents
, relocs
,
4190 local_syms
, local_sections
);
4192 /* This is a final link. */
4196 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4198 dynobj
= elf_hash_table (info
)->dynobj
;
4199 srelgot
= elf_hash_table (info
)->srelgot
;
4201 if (input_section
->flags
& SEC_ALLOC
)
4203 const char *section_name
;
4204 section_name
= (bfd_elf_string_from_elf_section
4205 (input_bfd
, elf_elfheader(input_bfd
)->e_shstrndx
,
4206 _bfd_elf_single_rel_hdr (input_section
)->sh_name
));
4207 BFD_ASSERT(section_name
!= NULL
);
4208 srel
= bfd_get_linker_section (dynobj
, section_name
);
4213 /* Find the gp value for this input bfd. */
4214 gotobj
= alpha_elf_tdata (input_bfd
)->gotobj
;
4217 sgot
= alpha_elf_tdata (gotobj
)->got
;
4218 gp
= _bfd_get_gp_value (gotobj
);
4221 gp
= (sgot
->output_section
->vma
4222 + sgot
->output_offset
4224 _bfd_set_gp_value (gotobj
, gp
);
4233 local_got_entries
= alpha_elf_tdata(input_bfd
)->local_got_entries
;
4235 if (elf_hash_table (info
)->tls_sec
!= NULL
)
4237 dtp_base
= alpha_get_dtprel_base (info
);
4238 tp_base
= alpha_get_tprel_base (info
);
4241 dtp_base
= tp_base
= 0;
4243 relend
= relocs
+ input_section
->reloc_count
;
4244 for (rel
= relocs
; rel
< relend
; rel
++)
4246 struct alpha_elf_link_hash_entry
*h
= NULL
;
4247 struct alpha_elf_got_entry
*gotent
;
4248 bfd_reloc_status_type r
;
4249 reloc_howto_type
*howto
;
4250 unsigned long r_symndx
;
4251 Elf_Internal_Sym
*sym
= NULL
;
4252 asection
*sec
= NULL
;
4255 bfd_boolean dynamic_symbol_p
;
4256 bfd_boolean unresolved_reloc
= FALSE
;
4257 bfd_boolean undef_weak_ref
= FALSE
;
4258 unsigned long r_type
;
4260 r_type
= ELF64_R_TYPE(rel
->r_info
);
4261 if (r_type
>= R_ALPHA_max
)
4264 /* xgettext:c-format */
4265 (_("%pB: unsupported relocation type %#x"),
4266 input_bfd
, (int) r_type
);
4267 bfd_set_error (bfd_error_bad_value
);
4272 howto
= elf64_alpha_howto_table
+ r_type
;
4273 r_symndx
= ELF64_R_SYM(rel
->r_info
);
4275 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4276 reloc to the STN_UNDEF (0) symbol so that they all match. */
4277 if (r_type
== R_ALPHA_TLSLDM
)
4278 r_symndx
= STN_UNDEF
;
4280 if (r_symndx
< symtab_hdr
->sh_info
)
4283 sym
= local_syms
+ r_symndx
;
4284 sec
= local_sections
[r_symndx
];
4286 value
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &msec
, rel
);
4288 /* If this is a tp-relative relocation against sym STN_UNDEF (0),
4289 this is hackery from relax_section. Force the value to
4290 be the tls module base. */
4291 if (r_symndx
== STN_UNDEF
4292 && (r_type
== R_ALPHA_TLSLDM
4293 || r_type
== R_ALPHA_GOTTPREL
4294 || r_type
== R_ALPHA_TPREL64
4295 || r_type
== R_ALPHA_TPRELHI
4296 || r_type
== R_ALPHA_TPRELLO
4297 || r_type
== R_ALPHA_TPREL16
))
4300 if (local_got_entries
)
4301 gotent
= local_got_entries
[r_symndx
];
4305 /* Need to adjust local GOT entries' addends for SEC_MERGE
4306 unless it has been done already. */
4307 if ((sec
->flags
& SEC_MERGE
)
4308 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
4309 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
4311 && !gotent
->reloc_xlated
)
4313 struct alpha_elf_got_entry
*ent
;
4315 for (ent
= gotent
; ent
; ent
= ent
->next
)
4317 ent
->reloc_xlated
= 1;
4318 if (ent
->use_count
== 0)
4322 _bfd_merged_section_offset (output_bfd
, &msec
,
4323 elf_section_data (sec
)->
4325 sym
->st_value
+ ent
->addend
);
4326 ent
->addend
-= sym
->st_value
;
4327 ent
->addend
+= msec
->output_section
->vma
4328 + msec
->output_offset
4329 - sec
->output_section
->vma
4330 - sec
->output_offset
;
4334 dynamic_symbol_p
= FALSE
;
4338 bfd_boolean warned
, ignored
;
4339 struct elf_link_hash_entry
*hh
;
4340 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
4342 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4343 r_symndx
, symtab_hdr
, sym_hashes
,
4345 unresolved_reloc
, warned
, ignored
);
4351 && ! unresolved_reloc
4352 && hh
->root
.type
== bfd_link_hash_undefweak
)
4353 undef_weak_ref
= TRUE
;
4355 h
= (struct alpha_elf_link_hash_entry
*) hh
;
4356 dynamic_symbol_p
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
4357 gotent
= h
->got_entries
;
4360 if (sec
!= NULL
&& discarded_section (sec
))
4361 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4362 rel
, 1, relend
, howto
, 0, contents
);
4364 addend
= rel
->r_addend
;
4367 /* Search for the proper got entry. */
4368 for (; gotent
; gotent
= gotent
->next
)
4369 if (gotent
->gotobj
== gotobj
4370 && gotent
->reloc_type
== r_type
4371 && gotent
->addend
== addend
)
4376 case R_ALPHA_GPDISP
:
4378 bfd_byte
*p_ldah
, *p_lda
;
4380 BFD_ASSERT(gp
!= 0);
4382 value
= (input_section
->output_section
->vma
4383 + input_section
->output_offset
4386 p_ldah
= contents
+ rel
->r_offset
;
4387 p_lda
= p_ldah
+ rel
->r_addend
;
4389 r
= elf64_alpha_do_reloc_gpdisp (input_bfd
, gp
- value
,
4394 case R_ALPHA_LITERAL
:
4395 BFD_ASSERT(sgot
!= NULL
);
4396 BFD_ASSERT(gp
!= 0);
4397 BFD_ASSERT(gotent
!= NULL
);
4398 BFD_ASSERT(gotent
->use_count
>= 1);
4400 if (!gotent
->reloc_done
)
4402 gotent
->reloc_done
= 1;
4404 bfd_put_64 (output_bfd
, value
,
4405 sgot
->contents
+ gotent
->got_offset
);
4407 /* If the symbol has been forced local, output a
4408 RELATIVE reloc, otherwise it will be handled in
4409 finish_dynamic_symbol. */
4410 if (bfd_link_pic (info
)
4411 && !dynamic_symbol_p
4413 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4414 gotent
->got_offset
, 0,
4415 R_ALPHA_RELATIVE
, value
);
4418 value
= (sgot
->output_section
->vma
4419 + sgot
->output_offset
4420 + gotent
->got_offset
);
4424 case R_ALPHA_GPREL32
:
4425 case R_ALPHA_GPREL16
:
4426 case R_ALPHA_GPRELLOW
:
4427 if (dynamic_symbol_p
)
4430 /* xgettext:c-format */
4431 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4432 input_bfd
, h
->root
.root
.root
.string
);
4435 BFD_ASSERT(gp
!= 0);
4439 case R_ALPHA_GPRELHIGH
:
4440 if (dynamic_symbol_p
)
4443 /* xgettext:c-format */
4444 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4445 input_bfd
, h
->root
.root
.root
.string
);
4448 BFD_ASSERT(gp
!= 0);
4450 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4454 /* A call to a dynamic symbol is definitely out of range of
4455 the 16-bit displacement. Don't bother writing anything. */
4456 if (dynamic_symbol_p
)
4461 /* The regular PC-relative stuff measures from the start of
4462 the instruction rather than the end. */
4466 case R_ALPHA_BRADDR
:
4467 if (dynamic_symbol_p
)
4470 /* xgettext:c-format */
4471 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4472 input_bfd
, h
->root
.root
.root
.string
);
4475 /* The regular PC-relative stuff measures from the start of
4476 the instruction rather than the end. */
4485 /* The regular PC-relative stuff measures from the start of
4486 the instruction rather than the end. */
4489 /* The source and destination gp must be the same. Note that
4490 the source will always have an assigned gp, since we forced
4491 one in check_relocs, but that the destination may not, as
4492 it might not have had any relocations at all. Also take
4493 care not to crash if H is an undefined symbol. */
4494 if (h
!= NULL
&& sec
!= NULL
4495 && alpha_elf_tdata (sec
->owner
)->gotobj
4496 && gotobj
!= alpha_elf_tdata (sec
->owner
)->gotobj
)
4499 /* xgettext:c-format */
4500 (_("%pB: change in gp: BRSGP %s"),
4501 input_bfd
, h
->root
.root
.root
.string
);
4505 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4507 other
= h
->root
.other
;
4509 other
= sym
->st_other
;
4510 switch (other
& STO_ALPHA_STD_GPLOAD
)
4512 case STO_ALPHA_NOPV
:
4514 case STO_ALPHA_STD_GPLOAD
:
4519 name
= h
->root
.root
.root
.string
;
4522 name
= (bfd_elf_string_from_elf_section
4523 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4525 name
= _("<unknown>");
4526 else if (name
[0] == 0)
4527 name
= bfd_section_name (sec
);
4530 /* xgettext:c-format */
4531 (_("%pB: !samegp reloc against symbol without .prologue: %s"),
4540 case R_ALPHA_REFLONG
:
4541 case R_ALPHA_REFQUAD
:
4542 case R_ALPHA_DTPREL64
:
4543 case R_ALPHA_TPREL64
:
4545 long dynindx
, dyntype
= r_type
;
4548 /* Careful here to remember RELATIVE relocations for global
4549 variables for symbolic shared objects. */
4551 if (dynamic_symbol_p
)
4553 BFD_ASSERT(h
->root
.dynindx
!= -1);
4554 dynindx
= h
->root
.dynindx
;
4556 addend
= 0, value
= 0;
4558 else if (r_type
== R_ALPHA_DTPREL64
)
4560 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4564 else if (r_type
== R_ALPHA_TPREL64
)
4566 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4567 if (!bfd_link_dll (info
))
4573 dynaddend
= value
- dtp_base
;
4575 else if (bfd_link_pic (info
)
4576 && r_symndx
!= STN_UNDEF
4577 && (input_section
->flags
& SEC_ALLOC
)
4579 && !(unresolved_reloc
4580 && (_bfd_elf_section_offset (output_bfd
, info
,
4585 if (r_type
== R_ALPHA_REFLONG
)
4588 /* xgettext:c-format */
4589 (_("%pB: unhandled dynamic relocation against %s"),
4591 h
->root
.root
.root
.string
);
4595 dyntype
= R_ALPHA_RELATIVE
;
4601 if (input_section
->flags
& SEC_ALLOC
)
4602 elf64_alpha_emit_dynrel (output_bfd
, info
, input_section
,
4603 srel
, rel
->r_offset
, dynindx
,
4604 dyntype
, dynaddend
);
4608 case R_ALPHA_SREL16
:
4609 case R_ALPHA_SREL32
:
4610 case R_ALPHA_SREL64
:
4611 if (dynamic_symbol_p
)
4614 /* xgettext:c-format */
4615 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4616 input_bfd
, h
->root
.root
.root
.string
);
4619 else if (bfd_link_pic (info
)
4623 /* xgettext:c-format */
4624 (_("%pB: pc-relative relocation against undefined weak symbol %s"),
4625 input_bfd
, h
->root
.root
.root
.string
);
4630 /* ??? .eh_frame references to discarded sections will be smashed
4631 to relocations against SHN_UNDEF. The .eh_frame format allows
4632 NULL to be encoded as 0 in any format, so this works here. */
4633 if (r_symndx
== STN_UNDEF
4634 || (unresolved_reloc
4635 && _bfd_elf_section_offset (output_bfd
, info
,
4637 rel
->r_offset
) == (bfd_vma
) -1))
4638 howto
= (elf64_alpha_howto_table
4639 + (r_type
- R_ALPHA_SREL32
+ R_ALPHA_REFLONG
));
4642 case R_ALPHA_TLSLDM
:
4643 /* Ignore the symbol for the relocation. The result is always
4644 the current module. */
4645 dynamic_symbol_p
= 0;
4649 if (!gotent
->reloc_done
)
4651 gotent
->reloc_done
= 1;
4653 /* Note that the module index for the main program is 1. */
4654 bfd_put_64 (output_bfd
,
4655 !bfd_link_pic (info
) && !dynamic_symbol_p
,
4656 sgot
->contents
+ gotent
->got_offset
);
4658 /* If the symbol has been forced local, output a
4659 DTPMOD64 reloc, otherwise it will be handled in
4660 finish_dynamic_symbol. */
4661 if (bfd_link_pic (info
) && !dynamic_symbol_p
)
4662 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4663 gotent
->got_offset
, 0,
4664 R_ALPHA_DTPMOD64
, 0);
4666 if (dynamic_symbol_p
|| r_type
== R_ALPHA_TLSLDM
)
4670 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4673 bfd_put_64 (output_bfd
, value
,
4674 sgot
->contents
+ gotent
->got_offset
+ 8);
4677 value
= (sgot
->output_section
->vma
4678 + sgot
->output_offset
4679 + gotent
->got_offset
);
4683 case R_ALPHA_DTPRELHI
:
4684 case R_ALPHA_DTPRELLO
:
4685 case R_ALPHA_DTPREL16
:
4686 if (dynamic_symbol_p
)
4689 /* xgettext:c-format */
4690 (_("%pB: dtp-relative relocation against dynamic symbol %s"),
4691 input_bfd
, h
->root
.root
.root
.string
);
4694 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4696 if (r_type
== R_ALPHA_DTPRELHI
)
4697 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4700 case R_ALPHA_TPRELHI
:
4701 case R_ALPHA_TPRELLO
:
4702 case R_ALPHA_TPREL16
:
4703 if (bfd_link_dll (info
))
4706 /* xgettext:c-format */
4707 (_("%pB: TLS local exec code cannot be linked into shared objects"),
4711 else if (dynamic_symbol_p
)
4714 /* xgettext:c-format */
4715 (_("%pB: tp-relative relocation against dynamic symbol %s"),
4716 input_bfd
, h
->root
.root
.root
.string
);
4719 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4721 if (r_type
== R_ALPHA_TPRELHI
)
4722 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4725 case R_ALPHA_GOTDTPREL
:
4726 case R_ALPHA_GOTTPREL
:
4727 BFD_ASSERT(sgot
!= NULL
);
4728 BFD_ASSERT(gp
!= 0);
4729 BFD_ASSERT(gotent
!= NULL
);
4730 BFD_ASSERT(gotent
->use_count
>= 1);
4732 if (!gotent
->reloc_done
)
4734 gotent
->reloc_done
= 1;
4736 if (dynamic_symbol_p
)
4740 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4741 if (r_type
== R_ALPHA_GOTDTPREL
)
4743 else if (bfd_link_executable (info
))
4747 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4748 gotent
->got_offset
, 0,
4754 bfd_put_64 (output_bfd
, value
,
4755 sgot
->contents
+ gotent
->got_offset
);
4758 value
= (sgot
->output_section
->vma
4759 + sgot
->output_offset
4760 + gotent
->got_offset
);
4766 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4767 contents
, rel
->r_offset
, value
, 0);
4776 case bfd_reloc_overflow
:
4780 /* Don't warn if the overflow is due to pc relative reloc
4781 against discarded section. Section optimization code should
4784 if (r_symndx
< symtab_hdr
->sh_info
4785 && sec
!= NULL
&& howto
->pc_relative
4786 && discarded_section (sec
))
4793 name
= (bfd_elf_string_from_elf_section
4794 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4798 name
= bfd_section_name (sec
);
4800 (*info
->callbacks
->reloc_overflow
)
4801 (info
, (h
? &h
->root
.root
: NULL
), name
, howto
->name
,
4802 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4807 case bfd_reloc_outofrange
:
4815 /* Finish up dynamic symbol handling. We set the contents of various
4816 dynamic sections here. */
4819 elf64_alpha_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
4820 struct elf_link_hash_entry
*h
,
4821 Elf_Internal_Sym
*sym
)
4823 struct alpha_elf_link_hash_entry
*ah
= (struct alpha_elf_link_hash_entry
*)h
;
4827 /* Fill in the .plt entry for this symbol. */
4828 asection
*splt
, *sgot
, *srel
;
4829 Elf_Internal_Rela outrel
;
4831 bfd_vma got_addr
, plt_addr
;
4833 struct alpha_elf_got_entry
*gotent
;
4835 BFD_ASSERT (h
->dynindx
!= -1);
4837 splt
= elf_hash_table (info
)->splt
;
4838 BFD_ASSERT (splt
!= NULL
);
4839 srel
= elf_hash_table (info
)->srelplt
;
4840 BFD_ASSERT (srel
!= NULL
);
4842 for (gotent
= ah
->got_entries
; gotent
; gotent
= gotent
->next
)
4843 if (gotent
->reloc_type
== R_ALPHA_LITERAL
4844 && gotent
->use_count
> 0)
4849 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4850 BFD_ASSERT (sgot
!= NULL
);
4852 BFD_ASSERT (gotent
->got_offset
!= -1);
4853 BFD_ASSERT (gotent
->plt_offset
!= -1);
4855 got_addr
= (sgot
->output_section
->vma
4856 + sgot
->output_offset
4857 + gotent
->got_offset
);
4858 plt_addr
= (splt
->output_section
->vma
4859 + splt
->output_offset
4860 + gotent
->plt_offset
);
4862 plt_index
= (gotent
->plt_offset
-PLT_HEADER_SIZE
) / PLT_ENTRY_SIZE
;
4864 /* Fill in the entry in the procedure linkage table. */
4865 if (elf64_alpha_use_secureplt
)
4867 disp
= (PLT_HEADER_SIZE
- 4) - (gotent
->plt_offset
+ 4);
4868 insn
= INSN_AD (INSN_BR
, 31, disp
);
4869 bfd_put_32 (output_bfd
, insn
,
4870 splt
->contents
+ gotent
->plt_offset
);
4872 plt_index
= ((gotent
->plt_offset
- NEW_PLT_HEADER_SIZE
)
4873 / NEW_PLT_ENTRY_SIZE
);
4877 disp
= -(gotent
->plt_offset
+ 4);
4878 insn
= INSN_AD (INSN_BR
, 28, disp
);
4879 bfd_put_32 (output_bfd
, insn
,
4880 splt
->contents
+ gotent
->plt_offset
);
4881 bfd_put_32 (output_bfd
, INSN_UNOP
,
4882 splt
->contents
+ gotent
->plt_offset
+ 4);
4883 bfd_put_32 (output_bfd
, INSN_UNOP
,
4884 splt
->contents
+ gotent
->plt_offset
+ 8);
4886 plt_index
= ((gotent
->plt_offset
- OLD_PLT_HEADER_SIZE
)
4887 / OLD_PLT_ENTRY_SIZE
);
4890 /* Fill in the entry in the .rela.plt section. */
4891 outrel
.r_offset
= got_addr
;
4892 outrel
.r_info
= ELF64_R_INFO(h
->dynindx
, R_ALPHA_JMP_SLOT
);
4893 outrel
.r_addend
= 0;
4895 loc
= srel
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
4896 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
4898 /* Fill in the entry in the .got. */
4899 bfd_put_64 (output_bfd
, plt_addr
,
4900 sgot
->contents
+ gotent
->got_offset
);
4903 else if (alpha_elf_dynamic_symbol_p (h
, info
))
4905 /* Fill in the dynamic relocations for this symbol's .got entries. */
4907 struct alpha_elf_got_entry
*gotent
;
4909 srel
= elf_hash_table (info
)->srelgot
;
4910 BFD_ASSERT (srel
!= NULL
);
4912 for (gotent
= ((struct alpha_elf_link_hash_entry
*) h
)->got_entries
;
4914 gotent
= gotent
->next
)
4919 if (gotent
->use_count
== 0)
4922 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4924 r_type
= gotent
->reloc_type
;
4927 case R_ALPHA_LITERAL
:
4928 r_type
= R_ALPHA_GLOB_DAT
;
4931 r_type
= R_ALPHA_DTPMOD64
;
4933 case R_ALPHA_GOTDTPREL
:
4934 r_type
= R_ALPHA_DTPREL64
;
4936 case R_ALPHA_GOTTPREL
:
4937 r_type
= R_ALPHA_TPREL64
;
4939 case R_ALPHA_TLSLDM
:
4944 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4945 gotent
->got_offset
, h
->dynindx
,
4946 r_type
, gotent
->addend
);
4948 if (gotent
->reloc_type
== R_ALPHA_TLSGD
)
4949 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4950 gotent
->got_offset
+ 8, h
->dynindx
,
4951 R_ALPHA_DTPREL64
, gotent
->addend
);
4955 /* Mark some specially defined symbols as absolute. */
4956 if (h
== elf_hash_table (info
)->hdynamic
4957 || h
== elf_hash_table (info
)->hgot
4958 || h
== elf_hash_table (info
)->hplt
)
4959 sym
->st_shndx
= SHN_ABS
;
4964 /* Finish up the dynamic sections. */
4967 elf64_alpha_finish_dynamic_sections (bfd
*output_bfd
,
4968 struct bfd_link_info
*info
)
4973 dynobj
= elf_hash_table (info
)->dynobj
;
4974 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4976 if (elf_hash_table (info
)->dynamic_sections_created
)
4978 asection
*splt
, *sgotplt
, *srelaplt
;
4979 Elf64_External_Dyn
*dyncon
, *dynconend
;
4980 bfd_vma plt_vma
, gotplt_vma
;
4982 splt
= elf_hash_table (info
)->splt
;
4983 srelaplt
= elf_hash_table (info
)->srelplt
;
4984 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
4986 plt_vma
= splt
->output_section
->vma
+ splt
->output_offset
;
4989 if (elf64_alpha_use_secureplt
)
4991 sgotplt
= elf_hash_table (info
)->sgotplt
;
4992 BFD_ASSERT (sgotplt
!= NULL
);
4993 if (sgotplt
->size
> 0)
4994 gotplt_vma
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
4997 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
4998 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4999 for (; dyncon
< dynconend
; dyncon
++)
5001 Elf_Internal_Dyn dyn
;
5003 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5009 = elf64_alpha_use_secureplt
? gotplt_vma
: plt_vma
;
5012 dyn
.d_un
.d_val
= srelaplt
? srelaplt
->size
: 0;
5015 dyn
.d_un
.d_ptr
= srelaplt
? (srelaplt
->output_section
->vma
5016 + srelaplt
->output_offset
) : 0;
5020 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5023 /* Initialize the plt header. */
5029 if (elf64_alpha_use_secureplt
)
5031 ofs
= gotplt_vma
- (plt_vma
+ PLT_HEADER_SIZE
);
5033 insn
= INSN_ABC (INSN_SUBQ
, 27, 28, 25);
5034 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5036 insn
= INSN_ABO (INSN_LDAH
, 28, 28, (ofs
+ 0x8000) >> 16);
5037 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5039 insn
= INSN_ABC (INSN_S4SUBQ
, 25, 25, 25);
5040 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5042 insn
= INSN_ABO (INSN_LDA
, 28, 28, ofs
);
5043 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5045 insn
= INSN_ABO (INSN_LDQ
, 27, 28, 0);
5046 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 16);
5048 insn
= INSN_ABC (INSN_ADDQ
, 25, 25, 25);
5049 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 20);
5051 insn
= INSN_ABO (INSN_LDQ
, 28, 28, 8);
5052 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 24);
5054 insn
= INSN_AB (INSN_JMP
, 31, 27);
5055 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 28);
5057 insn
= INSN_AD (INSN_BR
, 28, -PLT_HEADER_SIZE
);
5058 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 32);
5062 insn
= INSN_AD (INSN_BR
, 27, 0); /* br $27, .+4 */
5063 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5065 insn
= INSN_ABO (INSN_LDQ
, 27, 27, 12);
5066 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5069 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5071 insn
= INSN_AB (INSN_JMP
, 27, 27);
5072 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5074 /* The next two words will be filled in by ld.so. */
5075 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 16);
5076 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 24);
5079 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 0;
5086 /* We need to use a special link routine to handle the .mdebug section.
5087 We need to merge all instances of these sections together, not write
5088 them all out sequentially. */
5091 elf64_alpha_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5094 struct bfd_link_order
*p
;
5095 asection
*mdebug_sec
;
5096 struct ecoff_debug_info debug
;
5097 const struct ecoff_debug_swap
*swap
5098 = get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
5099 HDRR
*symhdr
= &debug
.symbolic_header
;
5100 void * mdebug_handle
= NULL
;
5101 struct alpha_elf_link_hash_table
* htab
;
5103 htab
= alpha_elf_hash_table (info
);
5107 /* Go through the sections and collect the mdebug information. */
5109 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
5111 if (strcmp (o
->name
, ".mdebug") == 0)
5113 struct extsym_info einfo
;
5115 /* We have found the .mdebug section in the output file.
5116 Look through all the link_orders comprising it and merge
5117 the information together. */
5118 symhdr
->magic
= swap
->sym_magic
;
5119 /* FIXME: What should the version stamp be? */
5121 symhdr
->ilineMax
= 0;
5125 symhdr
->isymMax
= 0;
5126 symhdr
->ioptMax
= 0;
5127 symhdr
->iauxMax
= 0;
5129 symhdr
->issExtMax
= 0;
5132 symhdr
->iextMax
= 0;
5134 /* We accumulate the debugging information itself in the
5135 debug_info structure. */
5137 debug
.external_dnr
= NULL
;
5138 debug
.external_pdr
= NULL
;
5139 debug
.external_sym
= NULL
;
5140 debug
.external_opt
= NULL
;
5141 debug
.external_aux
= NULL
;
5143 debug
.ssext
= debug
.ssext_end
= NULL
;
5144 debug
.external_fdr
= NULL
;
5145 debug
.external_rfd
= NULL
;
5146 debug
.external_ext
= debug
.external_ext_end
= NULL
;
5148 mdebug_handle
= bfd_ecoff_debug_init (abfd
, &debug
, swap
, info
);
5149 if (mdebug_handle
== NULL
)
5158 static const char * const name
[] =
5160 ".text", ".init", ".fini", ".data",
5161 ".rodata", ".sdata", ".sbss", ".bss"
5163 static const int sc
[] = { scText
, scInit
, scFini
, scData
,
5164 scRData
, scSData
, scSBss
, scBss
};
5167 esym
.cobol_main
= 0;
5171 esym
.asym
.iss
= issNil
;
5172 esym
.asym
.st
= stLocal
;
5173 esym
.asym
.reserved
= 0;
5174 esym
.asym
.index
= indexNil
;
5175 for (i
= 0; i
< 8; i
++)
5177 esym
.asym
.sc
= sc
[i
];
5178 s
= bfd_get_section_by_name (abfd
, name
[i
]);
5181 esym
.asym
.value
= s
->vma
;
5182 last
= s
->vma
+ s
->size
;
5185 esym
.asym
.value
= last
;
5187 if (! bfd_ecoff_debug_one_external (abfd
, &debug
, swap
,
5193 for (p
= o
->map_head
.link_order
;
5194 p
!= (struct bfd_link_order
*) NULL
;
5197 asection
*input_section
;
5199 const struct ecoff_debug_swap
*input_swap
;
5200 struct ecoff_debug_info input_debug
;
5204 if (p
->type
!= bfd_indirect_link_order
)
5206 if (p
->type
== bfd_data_link_order
)
5211 input_section
= p
->u
.indirect
.section
;
5212 input_bfd
= input_section
->owner
;
5214 if (! is_alpha_elf (input_bfd
))
5215 /* I don't know what a non ALPHA ELF bfd would be
5216 doing with a .mdebug section, but I don't really
5217 want to deal with it. */
5220 input_swap
= (get_elf_backend_data (input_bfd
)
5221 ->elf_backend_ecoff_debug_swap
);
5223 BFD_ASSERT (p
->size
== input_section
->size
);
5225 /* The ECOFF linking code expects that we have already
5226 read in the debugging information and set up an
5227 ecoff_debug_info structure, so we do that now. */
5228 if (!elf64_alpha_read_ecoff_info (input_bfd
, input_section
,
5232 if (! (bfd_ecoff_debug_accumulate
5233 (mdebug_handle
, abfd
, &debug
, swap
, input_bfd
,
5234 &input_debug
, input_swap
, info
)))
5237 /* Loop through the external symbols. For each one with
5238 interesting information, try to find the symbol in
5239 the linker global hash table and save the information
5240 for the output external symbols. */
5241 eraw_src
= (char *) input_debug
.external_ext
;
5242 eraw_end
= (eraw_src
5243 + (input_debug
.symbolic_header
.iextMax
5244 * input_swap
->external_ext_size
));
5246 eraw_src
< eraw_end
;
5247 eraw_src
+= input_swap
->external_ext_size
)
5251 struct alpha_elf_link_hash_entry
*h
;
5253 (*input_swap
->swap_ext_in
) (input_bfd
, eraw_src
, &ext
);
5254 if (ext
.asym
.sc
== scNil
5255 || ext
.asym
.sc
== scUndefined
5256 || ext
.asym
.sc
== scSUndefined
)
5259 name
= input_debug
.ssext
+ ext
.asym
.iss
;
5260 h
= alpha_elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
5261 if (h
== NULL
|| h
->esym
.ifd
!= -2)
5267 < input_debug
.symbolic_header
.ifdMax
);
5268 ext
.ifd
= input_debug
.ifdmap
[ext
.ifd
];
5274 /* Free up the information we just read. */
5275 free (input_debug
.line
);
5276 free (input_debug
.external_dnr
);
5277 free (input_debug
.external_pdr
);
5278 free (input_debug
.external_sym
);
5279 free (input_debug
.external_opt
);
5280 free (input_debug
.external_aux
);
5281 free (input_debug
.ss
);
5282 free (input_debug
.ssext
);
5283 free (input_debug
.external_fdr
);
5284 free (input_debug
.external_rfd
);
5285 free (input_debug
.external_ext
);
5287 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5288 elf_link_input_bfd ignores this section. */
5289 input_section
->flags
&=~ SEC_HAS_CONTENTS
;
5292 /* Build the external symbol information. */
5295 einfo
.debug
= &debug
;
5297 einfo
.failed
= FALSE
;
5298 elf_link_hash_traverse (elf_hash_table (info
),
5299 elf64_alpha_output_extsym
,
5304 /* Set the size of the .mdebug section. */
5305 o
->size
= bfd_ecoff_debug_size (abfd
, &debug
, swap
);
5307 /* Skip this section later on (I don't think this currently
5308 matters, but someday it might). */
5309 o
->map_head
.link_order
= (struct bfd_link_order
*) NULL
;
5315 /* Invoke the regular ELF backend linker to do all the work. */
5316 if (! bfd_elf_final_link (abfd
, info
))
5319 /* Now write out the computed sections. */
5321 /* The .got subsections... */
5323 bfd
*i
, *dynobj
= elf_hash_table(info
)->dynobj
;
5324 for (i
= htab
->got_list
;
5326 i
= alpha_elf_tdata(i
)->got_link_next
)
5330 /* elf_bfd_final_link already did everything in dynobj. */
5334 sgot
= alpha_elf_tdata(i
)->got
;
5335 if (! bfd_set_section_contents (abfd
, sgot
->output_section
,
5337 (file_ptr
) sgot
->output_offset
,
5343 if (mdebug_sec
!= (asection
*) NULL
)
5345 BFD_ASSERT (abfd
->output_has_begun
);
5346 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle
, abfd
, &debug
,
5348 mdebug_sec
->filepos
))
5351 bfd_ecoff_debug_free (mdebug_handle
, abfd
, &debug
, swap
, info
);
5357 static enum elf_reloc_type_class
5358 elf64_alpha_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5359 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5360 const Elf_Internal_Rela
*rela
)
5362 switch ((int) ELF64_R_TYPE (rela
->r_info
))
5364 case R_ALPHA_RELATIVE
:
5365 return reloc_class_relative
;
5366 case R_ALPHA_JMP_SLOT
:
5367 return reloc_class_plt
;
5369 return reloc_class_copy
;
5371 return reloc_class_normal
;
5375 static const struct bfd_elf_special_section elf64_alpha_special_sections
[] =
5377 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5378 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5379 { NULL
, 0, 0, 0, 0 }
5382 /* ECOFF swapping routines. These are used when dealing with the
5383 .mdebug section, which is in the ECOFF debugging format. Copied
5384 from elf32-mips.c. */
5385 static const struct ecoff_debug_swap
5386 elf64_alpha_ecoff_debug_swap
=
5388 /* Symbol table magic number. */
5390 /* Alignment of debugging information. E.g., 4. */
5392 /* Sizes of external symbolic information. */
5393 sizeof (struct hdr_ext
),
5394 sizeof (struct dnr_ext
),
5395 sizeof (struct pdr_ext
),
5396 sizeof (struct sym_ext
),
5397 sizeof (struct opt_ext
),
5398 sizeof (struct fdr_ext
),
5399 sizeof (struct rfd_ext
),
5400 sizeof (struct ext_ext
),
5401 /* Functions to swap in external symbolic data. */
5410 _bfd_ecoff_swap_tir_in
,
5411 _bfd_ecoff_swap_rndx_in
,
5412 /* Functions to swap out external symbolic data. */
5421 _bfd_ecoff_swap_tir_out
,
5422 _bfd_ecoff_swap_rndx_out
,
5423 /* Function to read in symbolic data. */
5424 elf64_alpha_read_ecoff_info
5427 /* Use a non-standard hash bucket size of 8. */
5429 static const struct elf_size_info alpha_elf_size_info
=
5431 sizeof (Elf64_External_Ehdr
),
5432 sizeof (Elf64_External_Phdr
),
5433 sizeof (Elf64_External_Shdr
),
5434 sizeof (Elf64_External_Rel
),
5435 sizeof (Elf64_External_Rela
),
5436 sizeof (Elf64_External_Sym
),
5437 sizeof (Elf64_External_Dyn
),
5438 sizeof (Elf_External_Note
),
5442 ELFCLASS64
, EV_CURRENT
,
5443 bfd_elf64_write_out_phdrs
,
5444 bfd_elf64_write_shdrs_and_ehdr
,
5445 bfd_elf64_checksum_contents
,
5446 bfd_elf64_write_relocs
,
5447 bfd_elf64_swap_symbol_in
,
5448 bfd_elf64_swap_symbol_out
,
5449 bfd_elf64_slurp_reloc_table
,
5450 bfd_elf64_slurp_symbol_table
,
5451 bfd_elf64_swap_dyn_in
,
5452 bfd_elf64_swap_dyn_out
,
5453 bfd_elf64_swap_reloc_in
,
5454 bfd_elf64_swap_reloc_out
,
5455 bfd_elf64_swap_reloca_in
,
5456 bfd_elf64_swap_reloca_out
5459 #define TARGET_LITTLE_SYM alpha_elf64_vec
5460 #define TARGET_LITTLE_NAME "elf64-alpha"
5461 #define ELF_ARCH bfd_arch_alpha
5462 #define ELF_TARGET_ID ALPHA_ELF_DATA
5463 #define ELF_MACHINE_CODE EM_ALPHA
5464 #define ELF_MAXPAGESIZE 0x10000
5465 #define ELF_COMMONPAGESIZE 0x2000
5467 #define bfd_elf64_bfd_link_hash_table_create \
5468 elf64_alpha_bfd_link_hash_table_create
5470 #define bfd_elf64_bfd_reloc_type_lookup \
5471 elf64_alpha_bfd_reloc_type_lookup
5472 #define bfd_elf64_bfd_reloc_name_lookup \
5473 elf64_alpha_bfd_reloc_name_lookup
5474 #define elf_info_to_howto \
5475 elf64_alpha_info_to_howto
5477 #define bfd_elf64_mkobject \
5478 elf64_alpha_mkobject
5479 #define elf_backend_object_p \
5480 elf64_alpha_object_p
5482 #define elf_backend_section_from_shdr \
5483 elf64_alpha_section_from_shdr
5484 #define elf_backend_section_flags \
5485 elf64_alpha_section_flags
5486 #define elf_backend_fake_sections \
5487 elf64_alpha_fake_sections
5489 #define bfd_elf64_bfd_is_local_label_name \
5490 elf64_alpha_is_local_label_name
5491 #define bfd_elf64_find_nearest_line \
5492 elf64_alpha_find_nearest_line
5493 #define bfd_elf64_bfd_relax_section \
5494 elf64_alpha_relax_section
5496 #define elf_backend_add_symbol_hook \
5497 elf64_alpha_add_symbol_hook
5498 #define elf_backend_relocs_compatible \
5499 _bfd_elf_relocs_compatible
5500 #define elf_backend_sort_relocs_p \
5501 elf64_alpha_sort_relocs_p
5502 #define elf_backend_check_relocs \
5503 elf64_alpha_check_relocs
5504 #define elf_backend_create_dynamic_sections \
5505 elf64_alpha_create_dynamic_sections
5506 #define elf_backend_adjust_dynamic_symbol \
5507 elf64_alpha_adjust_dynamic_symbol
5508 #define elf_backend_merge_symbol_attribute \
5509 elf64_alpha_merge_symbol_attribute
5510 #define elf_backend_copy_indirect_symbol \
5511 elf64_alpha_copy_indirect_symbol
5512 #define elf_backend_always_size_sections \
5513 elf64_alpha_always_size_sections
5514 #define elf_backend_size_dynamic_sections \
5515 elf64_alpha_size_dynamic_sections
5516 #define elf_backend_omit_section_dynsym \
5517 _bfd_elf_omit_section_dynsym_all
5518 #define elf_backend_relocate_section \
5519 elf64_alpha_relocate_section
5520 #define elf_backend_finish_dynamic_symbol \
5521 elf64_alpha_finish_dynamic_symbol
5522 #define elf_backend_finish_dynamic_sections \
5523 elf64_alpha_finish_dynamic_sections
5524 #define bfd_elf64_bfd_final_link \
5525 elf64_alpha_final_link
5526 #define elf_backend_reloc_type_class \
5527 elf64_alpha_reloc_type_class
5529 #define elf_backend_can_gc_sections 1
5530 #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
5532 #define elf_backend_ecoff_debug_swap \
5533 &elf64_alpha_ecoff_debug_swap
5535 #define elf_backend_size_info \
5538 #define elf_backend_special_sections \
5539 elf64_alpha_special_sections
5541 #define elf_backend_strip_zero_sized_dynamic_sections \
5542 _bfd_elf_strip_zero_sized_dynamic_sections
5544 /* A few constants that determine how the .plt section is set up. */
5545 #define elf_backend_want_got_plt 0
5546 #define elf_backend_plt_readonly 0
5547 #define elf_backend_want_plt_sym 1
5548 #define elf_backend_got_header_size 0
5549 #define elf_backend_dtrel_excludes_plt 1
5551 #include "elf64-target.h"
5553 /* FreeBSD support. */
5555 #undef TARGET_LITTLE_SYM
5556 #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
5557 #undef TARGET_LITTLE_NAME
5558 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5560 #define ELF_OSABI ELFOSABI_FREEBSD
5562 /* The kernel recognizes executables as valid only if they carry a
5563 "FreeBSD" label in the ELF header. So we put this label on all
5564 executables and (for simplicity) also all other object files. */
5567 elf64_alpha_fbsd_init_file_header (bfd
*abfd
, struct bfd_link_info
*info
)
5569 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
5571 if (!_bfd_elf_init_file_header (abfd
, info
))
5574 i_ehdrp
= elf_elfheader (abfd
);
5576 /* Put an ABI label supported by FreeBSD >= 4.1. */
5577 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
5578 #ifdef OLD_FREEBSD_ABI_LABEL
5579 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5580 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5585 #undef elf_backend_init_file_header
5586 #define elf_backend_init_file_header \
5587 elf64_alpha_fbsd_init_file_header
5590 #define elf64_bed elf64_alpha_fbsd_bed
5592 #include "elf64-target.h"