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 /* What kind of relocation? */
150 /* Is this against read-only section? */
151 unsigned int reltext
: 1;
153 /* How many did we find? */
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
;
2001 rent
->rtype
= r_type
;
2003 rent
->reltext
= (sec
->flags
& SEC_READONLY
) != 0;
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
)
2017 info
->flags
|= DF_TEXTREL
;
2025 /* Return the section that should be marked against GC for a given
2029 elf64_alpha_gc_mark_hook (asection
*sec
, struct bfd_link_info
*info
,
2030 Elf_Internal_Rela
*rel
,
2031 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
)
2033 /* These relocations don't really reference a symbol. Instead we store
2034 extra data in their addend slot. Ignore the symbol. */
2035 switch (ELF64_R_TYPE (rel
->r_info
))
2037 case R_ALPHA_LITUSE
:
2038 case R_ALPHA_GPDISP
:
2043 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2046 /* Adjust a symbol defined by a dynamic object and referenced by a
2047 regular object. The current definition is in some section of the
2048 dynamic object, but we're not including those sections. We have to
2049 change the definition to something the rest of the link can
2053 elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2054 struct elf_link_hash_entry
*h
)
2058 struct alpha_elf_link_hash_entry
*ah
;
2060 dynobj
= elf_hash_table(info
)->dynobj
;
2061 ah
= (struct alpha_elf_link_hash_entry
*)h
;
2063 /* Now that we've seen all of the input symbols, finalize our decision
2064 about whether this symbol should get a .plt entry. Irritatingly, it
2065 is common for folk to leave undefined symbols in shared libraries,
2066 and they still expect lazy binding; accept undefined symbols in lieu
2068 if (alpha_elf_dynamic_symbol_p (h
, info
) && elf64_alpha_want_plt (ah
))
2070 h
->needs_plt
= TRUE
;
2072 s
= elf_hash_table(info
)->splt
;
2073 if (!s
&& !elf64_alpha_create_dynamic_sections (dynobj
, info
))
2076 /* We need one plt entry per got subsection. Delay allocation of
2077 the actual plt entries until size_plt_section, called from
2078 size_dynamic_sections or during relaxation. */
2083 h
->needs_plt
= FALSE
;
2085 /* If this is a weak symbol, and there is a real definition, the
2086 processor independent code will have arranged for us to see the
2087 real definition first, and we can just use the same value. */
2088 if (h
->is_weakalias
)
2090 struct elf_link_hash_entry
*def
= weakdef (h
);
2091 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
2092 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
2093 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
2097 /* This is a reference to a symbol defined by a dynamic object which
2098 is not a function. The Alpha, since it uses .got entries for all
2099 symbols even in regular objects, does not need the hackery of a
2100 .dynbss section and COPY dynamic relocations. */
2105 /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
2108 elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry
*h
,
2109 const Elf_Internal_Sym
*isym
,
2110 bfd_boolean definition
,
2111 bfd_boolean dynamic
)
2113 if (!dynamic
&& definition
)
2114 h
->other
= ((h
->other
& ELF_ST_VISIBILITY (-1))
2115 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
2118 /* Symbol versioning can create new symbols, and make our old symbols
2119 indirect to the new ones. Consolidate the got and reloc information
2120 in these situations. */
2123 elf64_alpha_copy_indirect_symbol (struct bfd_link_info
*info
,
2124 struct elf_link_hash_entry
*dir
,
2125 struct elf_link_hash_entry
*ind
)
2127 struct alpha_elf_link_hash_entry
*hi
2128 = (struct alpha_elf_link_hash_entry
*) ind
;
2129 struct alpha_elf_link_hash_entry
*hs
2130 = (struct alpha_elf_link_hash_entry
*) dir
;
2132 /* Do the merging in the superclass. */
2133 _bfd_elf_link_hash_copy_indirect(info
, dir
, ind
);
2135 /* Merge the flags. Whee. */
2136 hs
->flags
|= hi
->flags
;
2138 /* ??? It's unclear to me what's really supposed to happen when
2139 "merging" defweak and defined symbols, given that we don't
2140 actually throw away the defweak. This more-or-less copies
2141 the logic related to got and plt entries in the superclass. */
2142 if (ind
->root
.type
!= bfd_link_hash_indirect
)
2145 /* Merge the .got entries. Cannibalize the old symbol's list in
2146 doing so, since we don't need it anymore. */
2148 if (hs
->got_entries
== NULL
)
2149 hs
->got_entries
= hi
->got_entries
;
2152 struct alpha_elf_got_entry
*gi
, *gs
, *gin
, *gsh
;
2154 gsh
= hs
->got_entries
;
2155 for (gi
= hi
->got_entries
; gi
; gi
= gin
)
2158 for (gs
= gsh
; gs
; gs
= gs
->next
)
2159 if (gi
->gotobj
== gs
->gotobj
2160 && gi
->reloc_type
== gs
->reloc_type
2161 && gi
->addend
== gs
->addend
)
2163 gs
->use_count
+= gi
->use_count
;
2166 gi
->next
= hs
->got_entries
;
2167 hs
->got_entries
= gi
;
2171 hi
->got_entries
= NULL
;
2173 /* And similar for the reloc entries. */
2175 if (hs
->reloc_entries
== NULL
)
2176 hs
->reloc_entries
= hi
->reloc_entries
;
2179 struct alpha_elf_reloc_entry
*ri
, *rs
, *rin
, *rsh
;
2181 rsh
= hs
->reloc_entries
;
2182 for (ri
= hi
->reloc_entries
; ri
; ri
= rin
)
2185 for (rs
= rsh
; rs
; rs
= rs
->next
)
2186 if (ri
->rtype
== rs
->rtype
&& ri
->srel
== rs
->srel
)
2188 rs
->count
+= ri
->count
;
2191 ri
->next
= hs
->reloc_entries
;
2192 hs
->reloc_entries
= ri
;
2196 hi
->reloc_entries
= NULL
;
2199 /* Is it possible to merge two object file's .got tables? */
2202 elf64_alpha_can_merge_gots (bfd
*a
, bfd
*b
)
2204 int total
= alpha_elf_tdata (a
)->total_got_size
;
2207 /* Trivial quick fallout test. */
2208 if (total
+ alpha_elf_tdata (b
)->total_got_size
<= MAX_GOT_SIZE
)
2211 /* By their nature, local .got entries cannot be merged. */
2212 if ((total
+= alpha_elf_tdata (b
)->local_got_size
) > MAX_GOT_SIZE
)
2215 /* Failing the common trivial comparison, we must effectively
2216 perform the merge. Not actually performing the merge means that
2217 we don't have to store undo information in case we fail. */
2218 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2220 struct alpha_elf_link_hash_entry
**hashes
= alpha_elf_sym_hashes (bsub
);
2221 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2224 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2225 for (i
= 0; i
< n
; ++i
)
2227 struct alpha_elf_got_entry
*ae
, *be
;
2228 struct alpha_elf_link_hash_entry
*h
;
2231 while (h
->root
.root
.type
== bfd_link_hash_indirect
2232 || h
->root
.root
.type
== bfd_link_hash_warning
)
2233 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2235 for (be
= h
->got_entries
; be
; be
= be
->next
)
2237 if (be
->use_count
== 0)
2239 if (be
->gotobj
!= b
)
2242 for (ae
= h
->got_entries
; ae
; ae
= ae
->next
)
2244 && ae
->reloc_type
== be
->reloc_type
2245 && ae
->addend
== be
->addend
)
2248 total
+= alpha_got_entry_size (be
->reloc_type
);
2249 if (total
> MAX_GOT_SIZE
)
2259 /* Actually merge two .got tables. */
2262 elf64_alpha_merge_gots (bfd
*a
, bfd
*b
)
2264 int total
= alpha_elf_tdata (a
)->total_got_size
;
2267 /* Remember local expansion. */
2269 int e
= alpha_elf_tdata (b
)->local_got_size
;
2271 alpha_elf_tdata (a
)->local_got_size
+= e
;
2274 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2276 struct alpha_elf_got_entry
**local_got_entries
;
2277 struct alpha_elf_link_hash_entry
**hashes
;
2278 Elf_Internal_Shdr
*symtab_hdr
;
2281 /* Let the local .got entries know they are part of a new subsegment. */
2282 local_got_entries
= alpha_elf_tdata (bsub
)->local_got_entries
;
2283 if (local_got_entries
)
2285 n
= elf_tdata (bsub
)->symtab_hdr
.sh_info
;
2286 for (i
= 0; i
< n
; ++i
)
2288 struct alpha_elf_got_entry
*ent
;
2289 for (ent
= local_got_entries
[i
]; ent
; ent
= ent
->next
)
2294 /* Merge the global .got entries. */
2295 hashes
= alpha_elf_sym_hashes (bsub
);
2296 symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2298 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2299 for (i
= 0; i
< n
; ++i
)
2301 struct alpha_elf_got_entry
*ae
, *be
, **pbe
, **start
;
2302 struct alpha_elf_link_hash_entry
*h
;
2305 while (h
->root
.root
.type
== bfd_link_hash_indirect
2306 || h
->root
.root
.type
== bfd_link_hash_warning
)
2307 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2309 pbe
= start
= &h
->got_entries
;
2310 while ((be
= *pbe
) != NULL
)
2312 if (be
->use_count
== 0)
2315 memset (be
, 0xa5, sizeof (*be
));
2318 if (be
->gotobj
!= b
)
2321 for (ae
= *start
; ae
; ae
= ae
->next
)
2323 && ae
->reloc_type
== be
->reloc_type
2324 && ae
->addend
== be
->addend
)
2326 ae
->flags
|= be
->flags
;
2327 ae
->use_count
+= be
->use_count
;
2329 memset (be
, 0xa5, sizeof (*be
));
2333 total
+= alpha_got_entry_size (be
->reloc_type
);
2341 alpha_elf_tdata (bsub
)->gotobj
= a
;
2343 alpha_elf_tdata (a
)->total_got_size
= total
;
2345 /* Merge the two in_got chains. */
2350 while ((next
= alpha_elf_tdata (bsub
)->in_got_link_next
) != NULL
)
2353 alpha_elf_tdata (bsub
)->in_got_link_next
= b
;
2357 /* Calculate the offsets for the got entries. */
2360 elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry
*h
,
2361 void * arg ATTRIBUTE_UNUSED
)
2363 struct alpha_elf_got_entry
*gotent
;
2365 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2366 if (gotent
->use_count
> 0)
2368 struct alpha_elf_obj_tdata
*td
;
2369 bfd_size_type
*plge
;
2371 td
= alpha_elf_tdata (gotent
->gotobj
);
2372 plge
= &td
->got
->size
;
2373 gotent
->got_offset
= *plge
;
2374 *plge
+= alpha_got_entry_size (gotent
->reloc_type
);
2381 elf64_alpha_calc_got_offsets (struct bfd_link_info
*info
)
2384 struct alpha_elf_link_hash_table
* htab
;
2386 htab
= alpha_elf_hash_table (info
);
2389 got_list
= htab
->got_list
;
2391 /* First, zero out the .got sizes, as we may be recalculating the
2392 .got after optimizing it. */
2393 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2394 alpha_elf_tdata(i
)->got
->size
= 0;
2396 /* Next, fill in the offsets for all the global entries. */
2397 alpha_elf_link_hash_traverse (htab
,
2398 elf64_alpha_calc_got_offsets_for_symbol
,
2401 /* Finally, fill in the offsets for the local entries. */
2402 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2404 bfd_size_type got_offset
= alpha_elf_tdata(i
)->got
->size
;
2407 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2409 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2412 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2413 if (!local_got_entries
)
2416 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2417 for (gotent
= local_got_entries
[k
]; gotent
; gotent
= gotent
->next
)
2418 if (gotent
->use_count
> 0)
2420 gotent
->got_offset
= got_offset
;
2421 got_offset
+= alpha_got_entry_size (gotent
->reloc_type
);
2425 alpha_elf_tdata(i
)->got
->size
= got_offset
;
2429 /* Constructs the gots. */
2432 elf64_alpha_size_got_sections (struct bfd_link_info
*info
,
2433 bfd_boolean may_merge
)
2435 bfd
*i
, *got_list
, *cur_got_obj
= NULL
;
2436 struct alpha_elf_link_hash_table
* htab
;
2438 htab
= alpha_elf_hash_table (info
);
2441 got_list
= htab
->got_list
;
2443 /* On the first time through, pretend we have an existing got list
2444 consisting of all of the input files. */
2445 if (got_list
== NULL
)
2447 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
2451 if (! is_alpha_elf (i
))
2454 this_got
= alpha_elf_tdata (i
)->gotobj
;
2455 if (this_got
== NULL
)
2458 /* We are assuming no merging has yet occurred. */
2459 BFD_ASSERT (this_got
== i
);
2461 if (alpha_elf_tdata (this_got
)->total_got_size
> MAX_GOT_SIZE
)
2463 /* Yikes! A single object file has too many entries. */
2465 /* xgettext:c-format */
2466 (_("%pB: .got subsegment exceeds 64K (size %d)"),
2467 i
, alpha_elf_tdata (this_got
)->total_got_size
);
2471 if (got_list
== NULL
)
2472 got_list
= this_got
;
2474 alpha_elf_tdata(cur_got_obj
)->got_link_next
= this_got
;
2475 cur_got_obj
= this_got
;
2478 /* Strange degenerate case of no got references. */
2479 if (got_list
== NULL
)
2482 htab
->got_list
= got_list
;
2485 cur_got_obj
= got_list
;
2486 if (cur_got_obj
== NULL
)
2491 i
= alpha_elf_tdata(cur_got_obj
)->got_link_next
;
2494 if (elf64_alpha_can_merge_gots (cur_got_obj
, i
))
2496 elf64_alpha_merge_gots (cur_got_obj
, i
);
2498 alpha_elf_tdata(i
)->got
->size
= 0;
2499 i
= alpha_elf_tdata(i
)->got_link_next
;
2500 alpha_elf_tdata(cur_got_obj
)->got_link_next
= i
;
2505 i
= alpha_elf_tdata(i
)->got_link_next
;
2510 /* Once the gots have been merged, fill in the got offsets for
2511 everything therein. */
2512 elf64_alpha_calc_got_offsets (info
);
2518 elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry
*h
,
2521 asection
*splt
= (asection
*) data
;
2522 struct alpha_elf_got_entry
*gotent
;
2523 bfd_boolean saw_one
= FALSE
;
2525 /* If we didn't need an entry before, we still don't. */
2526 if (!h
->root
.needs_plt
)
2529 /* For each LITERAL got entry still in use, allocate a plt entry. */
2530 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2531 if (gotent
->reloc_type
== R_ALPHA_LITERAL
2532 && gotent
->use_count
> 0)
2534 if (splt
->size
== 0)
2535 splt
->size
= PLT_HEADER_SIZE
;
2536 gotent
->plt_offset
= splt
->size
;
2537 splt
->size
+= PLT_ENTRY_SIZE
;
2541 /* If there weren't any, there's no longer a need for the PLT entry. */
2543 h
->root
.needs_plt
= FALSE
;
2548 /* Called from relax_section to rebuild the PLT in light of potential changes
2549 in the function's status. */
2552 elf64_alpha_size_plt_section (struct bfd_link_info
*info
)
2554 asection
*splt
, *spltrel
, *sgotplt
;
2555 unsigned long entries
;
2556 struct alpha_elf_link_hash_table
* htab
;
2558 htab
= alpha_elf_hash_table (info
);
2562 splt
= elf_hash_table(info
)->splt
;
2568 alpha_elf_link_hash_traverse (htab
,
2569 elf64_alpha_size_plt_section_1
, splt
);
2571 /* Every plt entry requires a JMP_SLOT relocation. */
2572 spltrel
= elf_hash_table(info
)->srelplt
;
2576 if (elf64_alpha_use_secureplt
)
2577 entries
= (splt
->size
- NEW_PLT_HEADER_SIZE
) / NEW_PLT_ENTRY_SIZE
;
2579 entries
= (splt
->size
- OLD_PLT_HEADER_SIZE
) / OLD_PLT_ENTRY_SIZE
;
2581 spltrel
->size
= entries
* sizeof (Elf64_External_Rela
);
2583 /* When using the secureplt, we need two words somewhere in the data
2584 segment for the dynamic linker to tell us where to go. This is the
2585 entire contents of the .got.plt section. */
2586 if (elf64_alpha_use_secureplt
)
2588 sgotplt
= elf_hash_table(info
)->sgotplt
;
2589 sgotplt
->size
= entries
? 16 : 0;
2594 elf64_alpha_always_size_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2595 struct bfd_link_info
*info
)
2598 struct alpha_elf_link_hash_table
* htab
;
2600 if (bfd_link_relocatable (info
))
2603 htab
= alpha_elf_hash_table (info
);
2607 if (!elf64_alpha_size_got_sections (info
, TRUE
))
2610 /* Allocate space for all of the .got subsections. */
2612 for ( ; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2614 asection
*s
= alpha_elf_tdata(i
)->got
;
2617 s
->contents
= (bfd_byte
*) bfd_zalloc (i
, s
->size
);
2618 if (s
->contents
== NULL
)
2626 /* The number of dynamic relocations required by a static relocation. */
2629 alpha_dynamic_entries_for_reloc (int r_type
, int dynamic
, int shared
, int pie
)
2633 /* May appear in GOT entries. */
2635 return (dynamic
? 2 : shared
? 1 : 0);
2636 case R_ALPHA_TLSLDM
:
2638 case R_ALPHA_LITERAL
:
2639 return dynamic
|| shared
;
2640 case R_ALPHA_GOTTPREL
:
2641 return dynamic
|| (shared
&& !pie
);
2642 case R_ALPHA_GOTDTPREL
:
2645 /* May appear in data sections. */
2646 case R_ALPHA_REFLONG
:
2647 case R_ALPHA_REFQUAD
:
2648 return dynamic
|| shared
;
2649 case R_ALPHA_TPREL64
:
2650 return dynamic
|| (shared
&& !pie
);
2652 /* Everything else is illegal. We'll issue an error during
2653 relocate_section. */
2659 /* Work out the sizes of the dynamic relocation entries. */
2662 elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry
*h
,
2663 struct bfd_link_info
*info
)
2665 bfd_boolean dynamic
;
2666 struct alpha_elf_reloc_entry
*relent
;
2667 unsigned long entries
;
2669 /* If the symbol was defined as a common symbol in a regular object
2670 file, and there was no definition in any dynamic object, then the
2671 linker will have allocated space for the symbol in a common
2672 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
2673 set. This is done for dynamic symbols in
2674 elf_adjust_dynamic_symbol but this is not done for non-dynamic
2675 symbols, somehow. */
2676 if (!h
->root
.def_regular
2677 && h
->root
.ref_regular
2678 && !h
->root
.def_dynamic
2679 && (h
->root
.root
.type
== bfd_link_hash_defined
2680 || h
->root
.root
.type
== bfd_link_hash_defweak
)
2681 && !(h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
))
2682 h
->root
.def_regular
= 1;
2684 /* If the symbol is dynamic, we'll need all the relocations in their
2685 natural form. If this is a shared object, and it has been forced
2686 local, we'll need the same number of RELATIVE relocations. */
2687 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2689 /* If the symbol is a hidden undefined weak, then we never have any
2690 relocations. Avoid the loop which may want to add RELATIVE relocs
2691 based on bfd_link_pic (info). */
2692 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2695 for (relent
= h
->reloc_entries
; relent
; relent
= relent
->next
)
2697 entries
= alpha_dynamic_entries_for_reloc (relent
->rtype
, dynamic
,
2698 bfd_link_pic (info
),
2699 bfd_link_pie (info
));
2702 relent
->srel
->size
+=
2703 entries
* sizeof (Elf64_External_Rela
) * relent
->count
;
2704 if (relent
->reltext
)
2705 info
->flags
|= DT_TEXTREL
;
2712 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
2716 elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry
*h
,
2717 struct bfd_link_info
*info
)
2719 bfd_boolean dynamic
;
2720 struct alpha_elf_got_entry
*gotent
;
2721 unsigned long entries
;
2723 /* If we're using a plt for this symbol, then all of its relocations
2724 for its got entries go into .rela.plt. */
2725 if (h
->root
.needs_plt
)
2728 /* If the symbol is dynamic, we'll need all the relocations in their
2729 natural form. If this is a shared object, and it has been forced
2730 local, we'll need the same number of RELATIVE relocations. */
2731 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2733 /* If the symbol is a hidden undefined weak, then we never have any
2734 relocations. Avoid the loop which may want to add RELATIVE relocs
2735 based on bfd_link_pic (info). */
2736 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2740 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2741 if (gotent
->use_count
> 0)
2742 entries
+= alpha_dynamic_entries_for_reloc (gotent
->reloc_type
, dynamic
,
2743 bfd_link_pic (info
),
2744 bfd_link_pie (info
));
2748 asection
*srel
= elf_hash_table(info
)->srelgot
;
2749 BFD_ASSERT (srel
!= NULL
);
2750 srel
->size
+= sizeof (Elf64_External_Rela
) * entries
;
2756 /* Set the sizes of the dynamic relocation sections. */
2759 elf64_alpha_size_rela_got_section (struct bfd_link_info
*info
)
2761 unsigned long entries
;
2764 struct alpha_elf_link_hash_table
* htab
;
2766 htab
= alpha_elf_hash_table (info
);
2770 /* Shared libraries often require RELATIVE relocs, and some relocs
2771 require attention for the main application as well. */
2774 for (i
= htab
->got_list
;
2775 i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2779 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2781 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2784 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2785 if (!local_got_entries
)
2788 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2789 for (gotent
= local_got_entries
[k
];
2790 gotent
; gotent
= gotent
->next
)
2791 if (gotent
->use_count
> 0)
2792 entries
+= (alpha_dynamic_entries_for_reloc
2793 (gotent
->reloc_type
, 0, bfd_link_pic (info
),
2794 bfd_link_pie (info
)));
2798 srel
= elf_hash_table(info
)->srelgot
;
2801 BFD_ASSERT (entries
== 0);
2804 srel
->size
= sizeof (Elf64_External_Rela
) * entries
;
2806 /* Now do the non-local symbols. */
2807 alpha_elf_link_hash_traverse (htab
,
2808 elf64_alpha_size_rela_got_1
, info
);
2811 /* Set the sizes of the dynamic sections. */
2814 elf64_alpha_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2815 struct bfd_link_info
*info
)
2819 bfd_boolean relplt
, relocs
;
2820 struct alpha_elf_link_hash_table
* htab
;
2822 htab
= alpha_elf_hash_table (info
);
2826 dynobj
= elf_hash_table(info
)->dynobj
;
2827 BFD_ASSERT(dynobj
!= NULL
);
2829 if (elf_hash_table (info
)->dynamic_sections_created
)
2831 /* Set the contents of the .interp section to the interpreter. */
2832 if (bfd_link_executable (info
) && !info
->nointerp
)
2834 s
= bfd_get_linker_section (dynobj
, ".interp");
2835 BFD_ASSERT (s
!= NULL
);
2836 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2837 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2840 /* Now that we've seen all of the input files, we can decide which
2841 symbols need dynamic relocation entries and which don't. We've
2842 collected information in check_relocs that we can now apply to
2843 size the dynamic relocation sections. */
2844 alpha_elf_link_hash_traverse (htab
,
2845 elf64_alpha_calc_dynrel_sizes
, info
);
2847 elf64_alpha_size_rela_got_section (info
);
2848 elf64_alpha_size_plt_section (info
);
2850 /* else we're not dynamic and by definition we don't need such things. */
2852 /* The check_relocs and adjust_dynamic_symbol entry points have
2853 determined the sizes of the various dynamic sections. Allocate
2857 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2861 if (!(s
->flags
& SEC_LINKER_CREATED
))
2864 /* It's OK to base decisions on the section name, because none
2865 of the dynobj section names depend upon the input files. */
2866 name
= bfd_section_name (s
);
2868 if (CONST_STRNEQ (name
, ".rela"))
2872 if (strcmp (name
, ".rela.plt") == 0)
2877 /* We use the reloc_count field as a counter if we need
2878 to copy relocs into the output file. */
2882 else if (! CONST_STRNEQ (name
, ".got")
2883 && strcmp (name
, ".plt") != 0
2884 && strcmp (name
, ".dynbss") != 0)
2886 /* It's not one of our dynamic sections, so don't allocate space. */
2892 /* If we don't need this section, strip it from the output file.
2893 This is to handle .rela.bss and .rela.plt. We must create it
2894 in create_dynamic_sections, because it must be created before
2895 the linker maps input sections to output sections. The
2896 linker does that before adjust_dynamic_symbol is called, and
2897 it is that function which decides whether anything needs to
2898 go into these sections. */
2899 if (!CONST_STRNEQ (name
, ".got"))
2900 s
->flags
|= SEC_EXCLUDE
;
2902 else if ((s
->flags
& SEC_HAS_CONTENTS
) != 0)
2904 /* Allocate memory for the section contents. */
2905 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2906 if (s
->contents
== NULL
)
2911 if (elf_hash_table (info
)->dynamic_sections_created
)
2913 /* Add some entries to the .dynamic section. We fill in the
2914 values later, in elf64_alpha_finish_dynamic_sections, but we
2915 must add the entries now so that we get the correct size for
2916 the .dynamic section. The DT_DEBUG entry is filled in by the
2917 dynamic linker and used by the debugger. */
2918 #define add_dynamic_entry(TAG, VAL) \
2919 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2921 if (bfd_link_executable (info
))
2923 if (!add_dynamic_entry (DT_DEBUG
, 0))
2929 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2930 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2931 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2932 || !add_dynamic_entry (DT_JMPREL
, 0))
2935 if (elf64_alpha_use_secureplt
2936 && !add_dynamic_entry (DT_ALPHA_PLTRO
, 1))
2942 if (!add_dynamic_entry (DT_RELA
, 0)
2943 || !add_dynamic_entry (DT_RELASZ
, 0)
2944 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2947 if (info
->flags
& DF_TEXTREL
)
2949 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2954 #undef add_dynamic_entry
2959 /* These functions do relaxation for Alpha ELF.
2961 Currently I'm only handling what I can do with existing compiler
2962 and assembler support, which means no instructions are removed,
2963 though some may be nopped. At this time GCC does not emit enough
2964 information to do all of the relaxing that is possible. It will
2965 take some not small amount of work for that to happen.
2967 There are a couple of interesting papers that I once read on this
2968 subject, that I cannot find references to at the moment, that
2969 related to Alpha in particular. They are by David Wall, then of
2972 struct alpha_relax_info
2977 Elf_Internal_Shdr
*symtab_hdr
;
2978 Elf_Internal_Rela
*relocs
, *relend
;
2979 struct bfd_link_info
*link_info
;
2983 struct alpha_elf_link_hash_entry
*h
;
2984 struct alpha_elf_got_entry
**first_gotent
;
2985 struct alpha_elf_got_entry
*gotent
;
2986 bfd_boolean changed_contents
;
2987 bfd_boolean changed_relocs
;
2988 unsigned char other
;
2991 static Elf_Internal_Rela
*
2992 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela
*rel
,
2993 Elf_Internal_Rela
*relend
,
2994 bfd_vma offset
, int type
)
2996 while (rel
< relend
)
2998 if (rel
->r_offset
== offset
2999 && ELF64_R_TYPE (rel
->r_info
) == (unsigned int) type
)
3007 elf64_alpha_relax_got_load (struct alpha_relax_info
*info
, bfd_vma symval
,
3008 Elf_Internal_Rela
*irel
, unsigned long r_type
)
3011 bfd_signed_vma disp
;
3013 /* Get the instruction. */
3014 insn
= bfd_get_32 (info
->abfd
, info
->contents
+ irel
->r_offset
);
3016 if (insn
>> 26 != OP_LDQ
)
3018 reloc_howto_type
*howto
= elf64_alpha_howto_table
+ r_type
;
3020 /* xgettext:c-format */
3021 (_("%pB: %pA+%#" PRIx64
": warning: "
3022 "%s relocation against unexpected insn"),
3023 info
->abfd
, info
->sec
, (uint64_t) irel
->r_offset
, howto
->name
);
3027 /* Can't relax dynamic symbols. */
3028 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3031 /* Can't use local-exec relocations in shared libraries. */
3032 if (r_type
== R_ALPHA_GOTTPREL
3033 && bfd_link_dll (info
->link_info
))
3036 if (r_type
== R_ALPHA_LITERAL
)
3038 /* Look for nice constant addresses. This includes the not-uncommon
3039 special case of 0 for undefweak symbols. */
3040 if ((info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3041 || (!bfd_link_pic (info
->link_info
)
3042 && (symval
>= (bfd_vma
)-0x8000 || symval
< 0x8000)))
3045 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3046 insn
|= (symval
& 0xffff);
3047 r_type
= R_ALPHA_NONE
;
3051 /* We may only create GPREL relocs during the second pass. */
3052 if (info
->link_info
->relax_pass
== 0)
3055 disp
= symval
- info
->gp
;
3056 insn
= (OP_LDA
<< 26) | (insn
& 0x03ff0000);
3057 r_type
= R_ALPHA_GPREL16
;
3062 bfd_vma dtp_base
, tp_base
;
3064 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3065 dtp_base
= alpha_get_dtprel_base (info
->link_info
);
3066 tp_base
= alpha_get_tprel_base (info
->link_info
);
3067 disp
= symval
- (r_type
== R_ALPHA_GOTDTPREL
? dtp_base
: tp_base
);
3069 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3073 case R_ALPHA_GOTDTPREL
:
3074 r_type
= R_ALPHA_DTPREL16
;
3076 case R_ALPHA_GOTTPREL
:
3077 r_type
= R_ALPHA_TPREL16
;
3085 if (disp
< -0x8000 || disp
>= 0x8000)
3088 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, info
->contents
+ irel
->r_offset
);
3089 info
->changed_contents
= TRUE
;
3091 /* Reduce the use count on this got entry by one, possibly
3093 if (--info
->gotent
->use_count
== 0)
3095 int sz
= alpha_got_entry_size (r_type
);
3096 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3098 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3101 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3102 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
), r_type
);
3103 info
->changed_relocs
= TRUE
;
3105 /* ??? Search forward through this basic block looking for insns
3106 that use the target register. Stop after an insn modifying the
3107 register is seen, or after a branch or call.
3109 Any such memory load insn may be substituted by a load directly
3110 off the GP. This allows the memory load insn to be issued before
3111 the calculated GP register would otherwise be ready.
3113 Any such jsr insn can be replaced by a bsr if it is in range.
3115 This would mean that we'd have to _add_ relocations, the pain of
3116 which gives one pause. */
3122 elf64_alpha_relax_opt_call (struct alpha_relax_info
*info
, bfd_vma symval
)
3124 /* If the function has the same gp, and we can identify that the
3125 function does not use its function pointer, we can eliminate the
3128 /* If the symbol is marked NOPV, we are being told the function never
3129 needs its procedure value. */
3130 if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_NOPV
)
3133 /* If the symbol is marked STD_GP, we are being told the function does
3134 a normal ldgp in the first two words. */
3135 else if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_STD_GPLOAD
)
3138 /* Otherwise, we may be able to identify a GP load in the first two
3139 words, which we can then skip. */
3142 Elf_Internal_Rela
*tsec_relocs
, *tsec_relend
, *tsec_free
, *gpdisp
;
3145 /* Load the relocations from the section that the target symbol is in. */
3146 if (info
->sec
== info
->tsec
)
3148 tsec_relocs
= info
->relocs
;
3149 tsec_relend
= info
->relend
;
3154 tsec_relocs
= (_bfd_elf_link_read_relocs
3155 (info
->abfd
, info
->tsec
, NULL
,
3156 (Elf_Internal_Rela
*) NULL
,
3157 info
->link_info
->keep_memory
));
3158 if (tsec_relocs
== NULL
)
3160 tsec_relend
= tsec_relocs
+ info
->tsec
->reloc_count
;
3161 tsec_free
= (elf_section_data (info
->tsec
)->relocs
== tsec_relocs
3166 /* Recover the symbol's offset within the section. */
3167 ofs
= (symval
- info
->tsec
->output_section
->vma
3168 - info
->tsec
->output_offset
);
3170 /* Look for a GPDISP reloc. */
3171 gpdisp
= (elf64_alpha_find_reloc_at_ofs
3172 (tsec_relocs
, tsec_relend
, ofs
, R_ALPHA_GPDISP
));
3174 if (!gpdisp
|| gpdisp
->r_addend
!= 4)
3184 /* We've now determined that we can skip an initial gp load. Verify
3185 that the call and the target use the same gp. */
3186 if (info
->link_info
->output_bfd
->xvec
!= info
->tsec
->owner
->xvec
3187 || info
->gotobj
!= alpha_elf_tdata (info
->tsec
->owner
)->gotobj
)
3194 elf64_alpha_relax_with_lituse (struct alpha_relax_info
*info
,
3195 bfd_vma symval
, Elf_Internal_Rela
*irel
)
3197 Elf_Internal_Rela
*urel
, *erel
, *irelend
= info
->relend
;
3199 bfd_signed_vma disp
;
3202 bfd_boolean lit_reused
= FALSE
;
3203 bfd_boolean all_optimized
= TRUE
;
3204 bfd_boolean changed_contents
;
3205 bfd_boolean changed_relocs
;
3206 bfd_byte
*contents
= info
->contents
;
3207 bfd
*abfd
= info
->abfd
;
3208 bfd_vma sec_output_vma
;
3209 unsigned int lit_insn
;
3212 lit_insn
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
3213 if (lit_insn
>> 26 != OP_LDQ
)
3216 /* xgettext:c-format */
3217 (_("%pB: %pA+%#" PRIx64
": warning: "
3218 "%s relocation against unexpected insn"),
3219 abfd
, info
->sec
, (uint64_t) irel
->r_offset
, "LITERAL");
3223 /* Can't relax dynamic symbols. */
3224 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3227 changed_contents
= info
->changed_contents
;
3228 changed_relocs
= info
->changed_relocs
;
3229 sec_output_vma
= info
->sec
->output_section
->vma
+ info
->sec
->output_offset
;
3230 relax_pass
= info
->link_info
->relax_pass
;
3232 /* Summarize how this particular LITERAL is used. */
3233 for (erel
= irel
+1, flags
= 0; erel
< irelend
; ++erel
)
3235 if (ELF64_R_TYPE (erel
->r_info
) != R_ALPHA_LITUSE
)
3237 if (erel
->r_addend
<= 6)
3238 flags
|= 1 << erel
->r_addend
;
3241 /* A little preparation for the loop... */
3242 disp
= symval
- info
->gp
;
3244 for (urel
= irel
+1; urel
< erel
; ++urel
)
3246 bfd_vma urel_r_offset
= urel
->r_offset
;
3249 bfd_signed_vma xdisp
;
3250 Elf_Internal_Rela nrel
;
3252 insn
= bfd_get_32 (abfd
, contents
+ urel_r_offset
);
3254 switch (urel
->r_addend
)
3256 case LITUSE_ALPHA_ADDR
:
3258 /* This type is really just a placeholder to note that all
3259 uses cannot be optimized, but to still allow some. */
3260 all_optimized
= FALSE
;
3263 case LITUSE_ALPHA_BASE
:
3264 /* We may only create GPREL relocs during the second pass. */
3265 if (relax_pass
== 0)
3267 all_optimized
= FALSE
;
3271 /* We can always optimize 16-bit displacements. */
3273 /* Extract the displacement from the instruction, sign-extending
3274 it if necessary, then test whether it is within 16 or 32 bits
3275 displacement from GP. */
3276 insn_disp
= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
3278 xdisp
= disp
+ insn_disp
;
3279 fits16
= (xdisp
>= - (bfd_signed_vma
) 0x8000 && xdisp
< 0x8000);
3280 fits32
= (xdisp
>= - (bfd_signed_vma
) 0x80000000
3281 && xdisp
< 0x7fff8000);
3285 /* Take the op code and dest from this insn, take the base
3286 register from the literal insn. Leave the offset alone. */
3287 insn
= (insn
& 0xffe0ffff) | (lit_insn
& 0x001f0000);
3288 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3289 changed_contents
= TRUE
;
3292 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3294 nrel
.r_addend
= irel
->r_addend
;
3296 /* As we adjust, move the reloc to the end so that we don't
3297 break the LITERAL+LITUSE chain. */
3301 changed_relocs
= TRUE
;
3304 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3305 else if (fits32
&& !(flags
& ~6))
3307 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3309 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3311 lit_insn
= (OP_LDAH
<< 26) | (lit_insn
& 0x03ff0000);
3312 bfd_put_32 (abfd
, (bfd_vma
) lit_insn
, contents
+ irel
->r_offset
);
3314 changed_contents
= TRUE
;
3316 /* Since all relocs must be optimized, don't bother swapping
3317 this relocation to the end. */
3318 urel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3320 urel
->r_addend
= irel
->r_addend
;
3321 changed_relocs
= TRUE
;
3324 all_optimized
= FALSE
;
3327 case LITUSE_ALPHA_BYTOFF
:
3328 /* We can always optimize byte instructions. */
3330 /* FIXME: sanity check the insn for byte op. Check that the
3331 literal dest reg is indeed Rb in the byte insn. */
3333 insn
&= ~ (unsigned) 0x001ff000;
3334 insn
|= ((symval
& 7) << 13) | 0x1000;
3335 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3336 changed_contents
= TRUE
;
3339 nrel
.r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3342 /* As we adjust, move the reloc to the end so that we don't
3343 break the LITERAL+LITUSE chain. */
3347 changed_relocs
= TRUE
;
3350 case LITUSE_ALPHA_JSR
:
3351 case LITUSE_ALPHA_TLSGD
:
3352 case LITUSE_ALPHA_TLSLDM
:
3353 case LITUSE_ALPHA_JSRDIRECT
:
3355 bfd_vma optdest
, org
;
3356 bfd_signed_vma odisp
;
3358 /* For undefined weak symbols, we're mostly interested in getting
3359 rid of the got entry whenever possible, so optimize this to a
3360 use of the zero register. */
3361 if (info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3364 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3366 changed_contents
= TRUE
;
3370 /* If not zero, place to jump without needing pv. */
3371 optdest
= elf64_alpha_relax_opt_call (info
, symval
);
3372 org
= sec_output_vma
+ urel_r_offset
+ 4;
3373 odisp
= (optdest
? optdest
: symval
) - org
;
3375 if (odisp
>= -0x400000 && odisp
< 0x400000)
3377 Elf_Internal_Rela
*xrel
;
3379 /* Preserve branch prediction call stack when possible. */
3380 if ((insn
& INSN_JSR_MASK
) == INSN_JSR
)
3381 insn
= (OP_BSR
<< 26) | (insn
& 0x03e00000);
3383 insn
= (OP_BR
<< 26) | (insn
& 0x03e00000);
3384 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3385 changed_contents
= TRUE
;
3388 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3390 nrel
.r_addend
= irel
->r_addend
;
3393 nrel
.r_addend
+= optdest
- symval
;
3395 all_optimized
= FALSE
;
3397 /* Kill any HINT reloc that might exist for this insn. */
3398 xrel
= (elf64_alpha_find_reloc_at_ofs
3399 (info
->relocs
, info
->relend
, urel_r_offset
,
3402 xrel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3404 /* As we adjust, move the reloc to the end so that we don't
3405 break the LITERAL+LITUSE chain. */
3410 info
->changed_relocs
= TRUE
;
3413 all_optimized
= FALSE
;
3415 /* Even if the target is not in range for a direct branch,
3416 if we share a GP, we can eliminate the gp reload. */
3419 Elf_Internal_Rela
*gpdisp
3420 = (elf64_alpha_find_reloc_at_ofs
3421 (info
->relocs
, irelend
, urel_r_offset
+ 4,
3425 bfd_byte
*p_ldah
= contents
+ gpdisp
->r_offset
;
3426 bfd_byte
*p_lda
= p_ldah
+ gpdisp
->r_addend
;
3427 unsigned int ldah
= bfd_get_32 (abfd
, p_ldah
);
3428 unsigned int lda
= bfd_get_32 (abfd
, p_lda
);
3430 /* Verify that the instruction is "ldah $29,0($26)".
3431 Consider a function that ends in a noreturn call,
3432 and that the next function begins with an ldgp,
3433 and that by accident there is no padding between.
3434 In that case the insn would use $27 as the base. */
3435 if (ldah
== 0x27ba0000 && lda
== 0x23bd0000)
3437 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_ldah
);
3438 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_lda
);
3440 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3441 changed_contents
= TRUE
;
3442 changed_relocs
= TRUE
;
3451 /* If we reused the literal instruction, we must have optimized all. */
3452 BFD_ASSERT(!lit_reused
|| all_optimized
);
3454 /* If all cases were optimized, we can reduce the use count on this
3455 got entry by one, possibly eliminating it. */
3458 if (--info
->gotent
->use_count
== 0)
3460 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3461 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3463 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3466 /* If the literal instruction is no longer needed (it may have been
3467 reused. We can eliminate it. */
3468 /* ??? For now, I don't want to deal with compacting the section,
3469 so just nop it out. */
3472 irel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3473 changed_relocs
= TRUE
;
3475 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, contents
+ irel
->r_offset
);
3476 changed_contents
= TRUE
;
3480 info
->changed_contents
= changed_contents
;
3481 info
->changed_relocs
= changed_relocs
;
3483 if (all_optimized
|| relax_pass
== 0)
3485 return elf64_alpha_relax_got_load (info
, symval
, irel
, R_ALPHA_LITERAL
);
3489 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info
*info
, bfd_vma symval
,
3490 Elf_Internal_Rela
*irel
, bfd_boolean is_gd
)
3493 unsigned int insn
, tlsgd_reg
;
3494 Elf_Internal_Rela
*gpdisp
, *hint
;
3495 bfd_boolean dynamic
, use_gottprel
;
3496 unsigned long new_symndx
;
3498 dynamic
= alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
);
3500 /* If a TLS symbol is accessed using IE at least once, there is no point
3501 to use dynamic model for it. */
3502 if (is_gd
&& info
->h
&& (info
->h
->flags
& ALPHA_ELF_LINK_HASH_TLS_IE
))
3505 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3506 then we might as well relax to IE. */
3507 else if (bfd_link_pic (info
->link_info
) && !dynamic
3508 && (info
->link_info
->flags
& DF_STATIC_TLS
))
3511 /* Otherwise we must be building an executable to do anything. */
3512 else if (bfd_link_pic (info
->link_info
))
3515 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3516 the matching LITUSE_TLS relocations. */
3517 if (irel
+ 2 >= info
->relend
)
3519 if (ELF64_R_TYPE (irel
[1].r_info
) != R_ALPHA_LITERAL
3520 || ELF64_R_TYPE (irel
[2].r_info
) != R_ALPHA_LITUSE
3521 || irel
[2].r_addend
!= (is_gd
? LITUSE_ALPHA_TLSGD
: LITUSE_ALPHA_TLSLDM
))
3524 /* There must be a GPDISP relocation positioned immediately after the
3525 LITUSE relocation. */
3526 gpdisp
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3527 irel
[2].r_offset
+ 4, R_ALPHA_GPDISP
);
3531 pos
[0] = info
->contents
+ irel
[0].r_offset
;
3532 pos
[1] = info
->contents
+ irel
[1].r_offset
;
3533 pos
[2] = info
->contents
+ irel
[2].r_offset
;
3534 pos
[3] = info
->contents
+ gpdisp
->r_offset
;
3535 pos
[4] = pos
[3] + gpdisp
->r_addend
;
3537 /* Beware of the compiler hoisting part of the sequence out a loop
3538 and adjusting the destination register for the TLSGD insn. If this
3539 happens, there will be a move into $16 before the JSR insn, so only
3540 transformations of the first insn pair should use this register. */
3541 tlsgd_reg
= bfd_get_32 (info
->abfd
, pos
[0]);
3542 tlsgd_reg
= (tlsgd_reg
>> 21) & 31;
3544 /* Generally, the positions are not allowed to be out of order, lest the
3545 modified insn sequence have different register lifetimes. We can make
3546 an exception when pos 1 is adjacent to pos 0. */
3547 if (pos
[1] + 4 == pos
[0])
3549 bfd_byte
*tmp
= pos
[0];
3553 if (pos
[1] >= pos
[2] || pos
[2] >= pos
[3])
3556 /* Reduce the use count on the LITERAL relocation. Do this before we
3557 smash the symndx when we adjust the relocations below. */
3559 struct alpha_elf_got_entry
*lit_gotent
;
3560 struct alpha_elf_link_hash_entry
*lit_h
;
3563 BFD_ASSERT (ELF64_R_SYM (irel
[1].r_info
) >= info
->symtab_hdr
->sh_info
);
3564 indx
= ELF64_R_SYM (irel
[1].r_info
) - info
->symtab_hdr
->sh_info
;
3565 lit_h
= alpha_elf_sym_hashes (info
->abfd
)[indx
];
3567 while (lit_h
->root
.root
.type
== bfd_link_hash_indirect
3568 || lit_h
->root
.root
.type
== bfd_link_hash_warning
)
3569 lit_h
= (struct alpha_elf_link_hash_entry
*) lit_h
->root
.root
.u
.i
.link
;
3571 for (lit_gotent
= lit_h
->got_entries
; lit_gotent
;
3572 lit_gotent
= lit_gotent
->next
)
3573 if (lit_gotent
->gotobj
== info
->gotobj
3574 && lit_gotent
->reloc_type
== R_ALPHA_LITERAL
3575 && lit_gotent
->addend
== irel
[1].r_addend
)
3577 BFD_ASSERT (lit_gotent
);
3579 if (--lit_gotent
->use_count
== 0)
3581 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3582 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3588 lda $16,x($gp) !tlsgd!1
3589 ldq $27,__tls_get_addr($gp) !literal!1
3590 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3591 ldah $29,0($26) !gpdisp!2
3592 lda $29,0($29) !gpdisp!2
3594 ldq $16,x($gp) !gottprel
3599 or the first pair to
3600 lda $16,x($gp) !tprel
3603 ldah $16,x($gp) !tprelhi
3604 lda $16,x($16) !tprello
3608 use_gottprel
= FALSE
;
3609 new_symndx
= is_gd
? ELF64_R_SYM (irel
->r_info
) : STN_UNDEF
;
3611 /* Some compilers warn about a Boolean-looking expression being
3612 used in a switch. The explicit cast silences them. */
3613 switch ((int) (!dynamic
&& !bfd_link_pic (info
->link_info
)))
3618 bfd_signed_vma disp
;
3620 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3621 tp_base
= alpha_get_tprel_base (info
->link_info
);
3622 disp
= symval
- tp_base
;
3624 if (disp
>= -0x8000 && disp
< 0x8000)
3626 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3627 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3628 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3630 irel
[0].r_offset
= pos
[0] - info
->contents
;
3631 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPREL16
);
3632 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3635 else if (disp
>= -(bfd_signed_vma
) 0x80000000
3636 && disp
< (bfd_signed_vma
) 0x7fff8000
3637 && pos
[0] + 4 == pos
[1])
3639 insn
= (OP_LDAH
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3640 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3641 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (tlsgd_reg
<< 16);
3642 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[1]);
3644 irel
[0].r_offset
= pos
[0] - info
->contents
;
3645 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELHI
);
3646 irel
[1].r_offset
= pos
[1] - info
->contents
;
3647 irel
[1].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELLO
);
3654 use_gottprel
= TRUE
;
3656 insn
= (OP_LDQ
<< 26) | (tlsgd_reg
<< 21) | (29 << 16);
3657 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3658 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3660 irel
[0].r_offset
= pos
[0] - info
->contents
;
3661 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_GOTTPREL
);
3662 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3666 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_RDUNIQ
, pos
[2]);
3668 insn
= INSN_ADDQ
| (16 << 21) | (0 << 16) | (0 << 0);
3669 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[3]);
3671 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[4]);
3673 irel
[2].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3674 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3676 hint
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3677 irel
[2].r_offset
, R_ALPHA_HINT
);
3679 hint
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3681 info
->changed_contents
= TRUE
;
3682 info
->changed_relocs
= TRUE
;
3684 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3685 if (--info
->gotent
->use_count
== 0)
3687 int sz
= alpha_got_entry_size (info
->gotent
->reloc_type
);
3688 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3690 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3693 /* If we've switched to a GOTTPREL relocation, increment the reference
3694 count on that got entry. */
3697 struct alpha_elf_got_entry
*tprel_gotent
;
3699 for (tprel_gotent
= *info
->first_gotent
; tprel_gotent
;
3700 tprel_gotent
= tprel_gotent
->next
)
3701 if (tprel_gotent
->gotobj
== info
->gotobj
3702 && tprel_gotent
->reloc_type
== R_ALPHA_GOTTPREL
3703 && tprel_gotent
->addend
== irel
->r_addend
)
3706 tprel_gotent
->use_count
++;
3709 if (info
->gotent
->use_count
== 0)
3710 tprel_gotent
= info
->gotent
;
3713 tprel_gotent
= (struct alpha_elf_got_entry
*)
3714 bfd_alloc (info
->abfd
, sizeof (struct alpha_elf_got_entry
));
3718 tprel_gotent
->next
= *info
->first_gotent
;
3719 *info
->first_gotent
= tprel_gotent
;
3721 tprel_gotent
->gotobj
= info
->gotobj
;
3722 tprel_gotent
->addend
= irel
->r_addend
;
3723 tprel_gotent
->got_offset
= -1;
3724 tprel_gotent
->reloc_done
= 0;
3725 tprel_gotent
->reloc_xlated
= 0;
3728 tprel_gotent
->use_count
= 1;
3729 tprel_gotent
->reloc_type
= R_ALPHA_GOTTPREL
;
3737 elf64_alpha_relax_section (bfd
*abfd
, asection
*sec
,
3738 struct bfd_link_info
*link_info
, bfd_boolean
*again
)
3740 Elf_Internal_Shdr
*symtab_hdr
;
3741 Elf_Internal_Rela
*internal_relocs
;
3742 Elf_Internal_Rela
*irel
, *irelend
;
3743 Elf_Internal_Sym
*isymbuf
= NULL
;
3744 struct alpha_elf_got_entry
**local_got_entries
;
3745 struct alpha_relax_info info
;
3746 struct alpha_elf_link_hash_table
* htab
;
3749 htab
= alpha_elf_hash_table (link_info
);
3753 /* There's nothing to change, yet. */
3756 if (bfd_link_relocatable (link_info
)
3757 || ((sec
->flags
& (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3758 != (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3759 || sec
->reloc_count
== 0)
3762 BFD_ASSERT (is_alpha_elf (abfd
));
3763 relax_pass
= link_info
->relax_pass
;
3765 /* Make sure our GOT and PLT tables are up-to-date. */
3766 if (htab
->relax_trip
!= link_info
->relax_trip
)
3768 htab
->relax_trip
= link_info
->relax_trip
;
3770 /* This should never fail after the initial round, since the only error
3771 is GOT overflow, and relaxation only shrinks the table. However, we
3772 may only merge got sections during the first pass. If we merge
3773 sections after we've created GPREL relocs, the GP for the merged
3774 section backs up which may put the relocs out of range. */
3775 if (!elf64_alpha_size_got_sections (link_info
, relax_pass
== 0))
3777 if (elf_hash_table (link_info
)->dynamic_sections_created
)
3779 elf64_alpha_size_plt_section (link_info
);
3780 elf64_alpha_size_rela_got_section (link_info
);
3784 symtab_hdr
= &elf_symtab_hdr (abfd
);
3785 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
3787 /* Load the relocations for this section. */
3788 internal_relocs
= (_bfd_elf_link_read_relocs
3789 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3790 link_info
->keep_memory
));
3791 if (internal_relocs
== NULL
)
3794 memset(&info
, 0, sizeof (info
));
3797 info
.link_info
= link_info
;
3798 info
.symtab_hdr
= symtab_hdr
;
3799 info
.relocs
= internal_relocs
;
3800 info
.relend
= irelend
= internal_relocs
+ sec
->reloc_count
;
3802 /* Find the GP for this object. Do not store the result back via
3803 _bfd_set_gp_value, since this could change again before final. */
3804 info
.gotobj
= alpha_elf_tdata (abfd
)->gotobj
;
3807 asection
*sgot
= alpha_elf_tdata (info
.gotobj
)->got
;
3808 info
.gp
= (sgot
->output_section
->vma
3809 + sgot
->output_offset
3813 /* Get the section contents. */
3814 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3815 info
.contents
= elf_section_data (sec
)->this_hdr
.contents
;
3818 if (!bfd_malloc_and_get_section (abfd
, sec
, &info
.contents
))
3822 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3825 struct alpha_elf_got_entry
*gotent
;
3826 unsigned long r_type
= ELF64_R_TYPE (irel
->r_info
);
3827 unsigned long r_symndx
= ELF64_R_SYM (irel
->r_info
);
3829 /* Early exit for unhandled or unrelaxable relocations. */
3830 if (r_type
!= R_ALPHA_LITERAL
)
3832 /* We complete everything except LITERAL in the first pass. */
3833 if (relax_pass
!= 0)
3835 if (r_type
== R_ALPHA_TLSLDM
)
3837 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3838 reloc to the STN_UNDEF (0) symbol so that they all match. */
3839 r_symndx
= STN_UNDEF
;
3841 else if (r_type
!= R_ALPHA_GOTDTPREL
3842 && r_type
!= R_ALPHA_GOTTPREL
3843 && r_type
!= R_ALPHA_TLSGD
)
3847 /* Get the value of the symbol referred to by the reloc. */
3848 if (r_symndx
< symtab_hdr
->sh_info
)
3850 /* A local symbol. */
3851 Elf_Internal_Sym
*isym
;
3853 /* Read this BFD's local symbols. */
3854 if (isymbuf
== NULL
)
3856 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3857 if (isymbuf
== NULL
)
3858 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
3859 symtab_hdr
->sh_info
, 0,
3861 if (isymbuf
== NULL
)
3865 isym
= isymbuf
+ r_symndx
;
3867 /* Given the symbol for a TLSLDM reloc is ignored, this also
3868 means forcing the symbol value to the tp base. */
3869 if (r_type
== R_ALPHA_TLSLDM
)
3871 info
.tsec
= bfd_abs_section_ptr
;
3872 symval
= alpha_get_tprel_base (info
.link_info
);
3876 symval
= isym
->st_value
;
3877 if (isym
->st_shndx
== SHN_UNDEF
)
3879 else if (isym
->st_shndx
== SHN_ABS
)
3880 info
.tsec
= bfd_abs_section_ptr
;
3881 else if (isym
->st_shndx
== SHN_COMMON
)
3882 info
.tsec
= bfd_com_section_ptr
;
3884 info
.tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3888 info
.other
= isym
->st_other
;
3889 if (local_got_entries
)
3890 info
.first_gotent
= &local_got_entries
[r_symndx
];
3893 info
.first_gotent
= &info
.gotent
;
3900 struct alpha_elf_link_hash_entry
*h
;
3902 indx
= r_symndx
- symtab_hdr
->sh_info
;
3903 h
= alpha_elf_sym_hashes (abfd
)[indx
];
3904 BFD_ASSERT (h
!= NULL
);
3906 while (h
->root
.root
.type
== bfd_link_hash_indirect
3907 || h
->root
.root
.type
== bfd_link_hash_warning
)
3908 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
3910 /* If the symbol is undefined, we can't do anything with it. */
3911 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
3914 /* If the symbol isn't defined in the current module,
3915 again we can't do anything. */
3916 if (h
->root
.root
.type
== bfd_link_hash_undefweak
)
3918 info
.tsec
= bfd_abs_section_ptr
;
3921 else if (!h
->root
.def_regular
)
3923 /* Except for TLSGD relocs, which can sometimes be
3924 relaxed to GOTTPREL relocs. */
3925 if (r_type
!= R_ALPHA_TLSGD
)
3927 info
.tsec
= bfd_abs_section_ptr
;
3932 info
.tsec
= h
->root
.root
.u
.def
.section
;
3933 symval
= h
->root
.root
.u
.def
.value
;
3937 info
.other
= h
->root
.other
;
3938 info
.first_gotent
= &h
->got_entries
;
3941 /* Search for the got entry to be used by this relocation. */
3942 for (gotent
= *info
.first_gotent
; gotent
; gotent
= gotent
->next
)
3943 if (gotent
->gotobj
== info
.gotobj
3944 && gotent
->reloc_type
== r_type
3945 && gotent
->addend
== irel
->r_addend
)
3947 info
.gotent
= gotent
;
3949 symval
+= info
.tsec
->output_section
->vma
+ info
.tsec
->output_offset
;
3950 symval
+= irel
->r_addend
;
3954 case R_ALPHA_LITERAL
:
3955 BFD_ASSERT(info
.gotent
!= NULL
);
3957 /* If there exist LITUSE relocations immediately following, this
3958 opens up all sorts of interesting optimizations, because we
3959 now know every location that this address load is used. */
3960 if (irel
+1 < irelend
3961 && ELF64_R_TYPE (irel
[1].r_info
) == R_ALPHA_LITUSE
)
3963 if (!elf64_alpha_relax_with_lituse (&info
, symval
, irel
))
3968 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3973 case R_ALPHA_GOTDTPREL
:
3974 case R_ALPHA_GOTTPREL
:
3975 BFD_ASSERT(info
.gotent
!= NULL
);
3976 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3981 case R_ALPHA_TLSLDM
:
3982 BFD_ASSERT(info
.gotent
!= NULL
);
3983 if (!elf64_alpha_relax_tls_get_addr (&info
, symval
, irel
,
3984 r_type
== R_ALPHA_TLSGD
))
3991 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
3993 if (!link_info
->keep_memory
)
3997 /* Cache the symbols for elf_link_input_bfd. */
3998 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
4002 if (info
.contents
!= NULL
4003 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4005 if (!info
.changed_contents
&& !link_info
->keep_memory
)
4006 free (info
.contents
);
4009 /* Cache the section contents for elf_link_input_bfd. */
4010 elf_section_data (sec
)->this_hdr
.contents
= info
.contents
;
4014 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
4016 if (!info
.changed_relocs
)
4017 free (internal_relocs
);
4019 elf_section_data (sec
)->relocs
= internal_relocs
;
4022 *again
= info
.changed_contents
|| info
.changed_relocs
;
4028 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4030 if (info
.contents
!= NULL
4031 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4032 free (info
.contents
);
4033 if (internal_relocs
!= NULL
4034 && elf_section_data (sec
)->relocs
!= internal_relocs
)
4035 free (internal_relocs
);
4039 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4040 into the next available slot in SREL. */
4043 elf64_alpha_emit_dynrel (bfd
*abfd
, struct bfd_link_info
*info
,
4044 asection
*sec
, asection
*srel
, bfd_vma offset
,
4045 long dynindx
, long rtype
, bfd_vma addend
)
4047 Elf_Internal_Rela outrel
;
4050 BFD_ASSERT (srel
!= NULL
);
4052 outrel
.r_info
= ELF64_R_INFO (dynindx
, rtype
);
4053 outrel
.r_addend
= addend
;
4055 offset
= _bfd_elf_section_offset (abfd
, info
, sec
, offset
);
4056 if ((offset
| 1) != (bfd_vma
) -1)
4057 outrel
.r_offset
= sec
->output_section
->vma
+ sec
->output_offset
+ offset
;
4059 memset (&outrel
, 0, sizeof (outrel
));
4061 loc
= srel
->contents
;
4062 loc
+= srel
->reloc_count
++ * sizeof (Elf64_External_Rela
);
4063 bfd_elf64_swap_reloca_out (abfd
, &outrel
, loc
);
4064 BFD_ASSERT (sizeof (Elf64_External_Rela
) * srel
->reloc_count
<= srel
->size
);
4067 /* Relocate an Alpha ELF section for a relocatable link.
4069 We don't have to change anything unless the reloc is against a section
4070 symbol, in which case we have to adjust according to where the section
4071 symbol winds up in the output section. */
4074 elf64_alpha_relocate_section_r (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4075 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4076 bfd
*input_bfd
, asection
*input_section
,
4077 bfd_byte
*contents ATTRIBUTE_UNUSED
,
4078 Elf_Internal_Rela
*relocs
,
4079 Elf_Internal_Sym
*local_syms
,
4080 asection
**local_sections
)
4082 unsigned long symtab_hdr_sh_info
;
4083 Elf_Internal_Rela
*rel
;
4084 Elf_Internal_Rela
*relend
;
4085 struct elf_link_hash_entry
**sym_hashes
;
4086 bfd_boolean ret_val
= TRUE
;
4088 symtab_hdr_sh_info
= elf_symtab_hdr (input_bfd
).sh_info
;
4089 sym_hashes
= elf_sym_hashes (input_bfd
);
4091 relend
= relocs
+ input_section
->reloc_count
;
4092 for (rel
= relocs
; rel
< relend
; rel
++)
4094 unsigned long r_symndx
;
4095 Elf_Internal_Sym
*sym
;
4097 unsigned long r_type
;
4099 r_type
= ELF64_R_TYPE (rel
->r_info
);
4100 if (r_type
>= R_ALPHA_max
)
4103 /* xgettext:c-format */
4104 (_("%pB: unsupported relocation type %#x"),
4105 input_bfd
, (int) r_type
);
4106 bfd_set_error (bfd_error_bad_value
);
4111 /* The symbol associated with GPDISP and LITUSE is
4112 immaterial. Only the addend is significant. */
4113 if (r_type
== R_ALPHA_GPDISP
|| r_type
== R_ALPHA_LITUSE
)
4116 r_symndx
= ELF64_R_SYM (rel
->r_info
);
4117 if (r_symndx
< symtab_hdr_sh_info
)
4119 sym
= local_syms
+ r_symndx
;
4120 sec
= local_sections
[r_symndx
];
4124 struct elf_link_hash_entry
*h
;
4126 h
= sym_hashes
[r_symndx
- symtab_hdr_sh_info
];
4128 while (h
->root
.type
== bfd_link_hash_indirect
4129 || h
->root
.type
== bfd_link_hash_warning
)
4130 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4132 if (h
->root
.type
!= bfd_link_hash_defined
4133 && h
->root
.type
!= bfd_link_hash_defweak
)
4137 sec
= h
->root
.u
.def
.section
;
4140 if (sec
!= NULL
&& discarded_section (sec
))
4141 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4143 elf64_alpha_howto_table
+ r_type
, 0,
4146 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
4147 rel
->r_addend
+= sec
->output_offset
;
4153 /* Relocate an Alpha ELF section. */
4156 elf64_alpha_relocate_section (bfd
*output_bfd
, struct bfd_link_info
*info
,
4157 bfd
*input_bfd
, asection
*input_section
,
4158 bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
4159 Elf_Internal_Sym
*local_syms
,
4160 asection
**local_sections
)
4162 Elf_Internal_Shdr
*symtab_hdr
;
4163 Elf_Internal_Rela
*rel
;
4164 Elf_Internal_Rela
*relend
;
4165 asection
*sgot
, *srel
, *srelgot
;
4166 bfd
*dynobj
, *gotobj
;
4167 bfd_vma gp
, tp_base
, dtp_base
;
4168 struct alpha_elf_got_entry
**local_got_entries
;
4169 bfd_boolean ret_val
;
4171 BFD_ASSERT (is_alpha_elf (input_bfd
));
4173 /* Handle relocatable links with a smaller loop. */
4174 if (bfd_link_relocatable (info
))
4175 return elf64_alpha_relocate_section_r (output_bfd
, info
, input_bfd
,
4176 input_section
, contents
, relocs
,
4177 local_syms
, local_sections
);
4179 /* This is a final link. */
4183 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4185 dynobj
= elf_hash_table (info
)->dynobj
;
4186 srelgot
= elf_hash_table (info
)->srelgot
;
4188 if (input_section
->flags
& SEC_ALLOC
)
4190 const char *section_name
;
4191 section_name
= (bfd_elf_string_from_elf_section
4192 (input_bfd
, elf_elfheader(input_bfd
)->e_shstrndx
,
4193 _bfd_elf_single_rel_hdr (input_section
)->sh_name
));
4194 BFD_ASSERT(section_name
!= NULL
);
4195 srel
= bfd_get_linker_section (dynobj
, section_name
);
4200 /* Find the gp value for this input bfd. */
4201 gotobj
= alpha_elf_tdata (input_bfd
)->gotobj
;
4204 sgot
= alpha_elf_tdata (gotobj
)->got
;
4205 gp
= _bfd_get_gp_value (gotobj
);
4208 gp
= (sgot
->output_section
->vma
4209 + sgot
->output_offset
4211 _bfd_set_gp_value (gotobj
, gp
);
4220 local_got_entries
= alpha_elf_tdata(input_bfd
)->local_got_entries
;
4222 if (elf_hash_table (info
)->tls_sec
!= NULL
)
4224 dtp_base
= alpha_get_dtprel_base (info
);
4225 tp_base
= alpha_get_tprel_base (info
);
4228 dtp_base
= tp_base
= 0;
4230 relend
= relocs
+ input_section
->reloc_count
;
4231 for (rel
= relocs
; rel
< relend
; rel
++)
4233 struct alpha_elf_link_hash_entry
*h
= NULL
;
4234 struct alpha_elf_got_entry
*gotent
;
4235 bfd_reloc_status_type r
;
4236 reloc_howto_type
*howto
;
4237 unsigned long r_symndx
;
4238 Elf_Internal_Sym
*sym
= NULL
;
4239 asection
*sec
= NULL
;
4242 bfd_boolean dynamic_symbol_p
;
4243 bfd_boolean unresolved_reloc
= FALSE
;
4244 bfd_boolean undef_weak_ref
= FALSE
;
4245 unsigned long r_type
;
4247 r_type
= ELF64_R_TYPE(rel
->r_info
);
4248 if (r_type
>= R_ALPHA_max
)
4251 /* xgettext:c-format */
4252 (_("%pB: unsupported relocation type %#x"),
4253 input_bfd
, (int) r_type
);
4254 bfd_set_error (bfd_error_bad_value
);
4259 howto
= elf64_alpha_howto_table
+ r_type
;
4260 r_symndx
= ELF64_R_SYM(rel
->r_info
);
4262 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4263 reloc to the STN_UNDEF (0) symbol so that they all match. */
4264 if (r_type
== R_ALPHA_TLSLDM
)
4265 r_symndx
= STN_UNDEF
;
4267 if (r_symndx
< symtab_hdr
->sh_info
)
4270 sym
= local_syms
+ r_symndx
;
4271 sec
= local_sections
[r_symndx
];
4273 value
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &msec
, rel
);
4275 /* If this is a tp-relative relocation against sym STN_UNDEF (0),
4276 this is hackery from relax_section. Force the value to
4277 be the tls module base. */
4278 if (r_symndx
== STN_UNDEF
4279 && (r_type
== R_ALPHA_TLSLDM
4280 || r_type
== R_ALPHA_GOTTPREL
4281 || r_type
== R_ALPHA_TPREL64
4282 || r_type
== R_ALPHA_TPRELHI
4283 || r_type
== R_ALPHA_TPRELLO
4284 || r_type
== R_ALPHA_TPREL16
))
4287 if (local_got_entries
)
4288 gotent
= local_got_entries
[r_symndx
];
4292 /* Need to adjust local GOT entries' addends for SEC_MERGE
4293 unless it has been done already. */
4294 if ((sec
->flags
& SEC_MERGE
)
4295 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
4296 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
4298 && !gotent
->reloc_xlated
)
4300 struct alpha_elf_got_entry
*ent
;
4302 for (ent
= gotent
; ent
; ent
= ent
->next
)
4304 ent
->reloc_xlated
= 1;
4305 if (ent
->use_count
== 0)
4309 _bfd_merged_section_offset (output_bfd
, &msec
,
4310 elf_section_data (sec
)->
4312 sym
->st_value
+ ent
->addend
);
4313 ent
->addend
-= sym
->st_value
;
4314 ent
->addend
+= msec
->output_section
->vma
4315 + msec
->output_offset
4316 - sec
->output_section
->vma
4317 - sec
->output_offset
;
4321 dynamic_symbol_p
= FALSE
;
4325 bfd_boolean warned
, ignored
;
4326 struct elf_link_hash_entry
*hh
;
4327 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
4329 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4330 r_symndx
, symtab_hdr
, sym_hashes
,
4332 unresolved_reloc
, warned
, ignored
);
4338 && ! unresolved_reloc
4339 && hh
->root
.type
== bfd_link_hash_undefweak
)
4340 undef_weak_ref
= TRUE
;
4342 h
= (struct alpha_elf_link_hash_entry
*) hh
;
4343 dynamic_symbol_p
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
4344 gotent
= h
->got_entries
;
4347 if (sec
!= NULL
&& discarded_section (sec
))
4348 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4349 rel
, 1, relend
, howto
, 0, contents
);
4351 addend
= rel
->r_addend
;
4354 /* Search for the proper got entry. */
4355 for (; gotent
; gotent
= gotent
->next
)
4356 if (gotent
->gotobj
== gotobj
4357 && gotent
->reloc_type
== r_type
4358 && gotent
->addend
== addend
)
4363 case R_ALPHA_GPDISP
:
4365 bfd_byte
*p_ldah
, *p_lda
;
4367 BFD_ASSERT(gp
!= 0);
4369 value
= (input_section
->output_section
->vma
4370 + input_section
->output_offset
4373 p_ldah
= contents
+ rel
->r_offset
;
4374 p_lda
= p_ldah
+ rel
->r_addend
;
4376 r
= elf64_alpha_do_reloc_gpdisp (input_bfd
, gp
- value
,
4381 case R_ALPHA_LITERAL
:
4382 BFD_ASSERT(sgot
!= NULL
);
4383 BFD_ASSERT(gp
!= 0);
4384 BFD_ASSERT(gotent
!= NULL
);
4385 BFD_ASSERT(gotent
->use_count
>= 1);
4387 if (!gotent
->reloc_done
)
4389 gotent
->reloc_done
= 1;
4391 bfd_put_64 (output_bfd
, value
,
4392 sgot
->contents
+ gotent
->got_offset
);
4394 /* If the symbol has been forced local, output a
4395 RELATIVE reloc, otherwise it will be handled in
4396 finish_dynamic_symbol. */
4397 if (bfd_link_pic (info
)
4398 && !dynamic_symbol_p
4400 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4401 gotent
->got_offset
, 0,
4402 R_ALPHA_RELATIVE
, value
);
4405 value
= (sgot
->output_section
->vma
4406 + sgot
->output_offset
4407 + gotent
->got_offset
);
4411 case R_ALPHA_GPREL32
:
4412 case R_ALPHA_GPREL16
:
4413 case R_ALPHA_GPRELLOW
:
4414 if (dynamic_symbol_p
)
4417 /* xgettext:c-format */
4418 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4419 input_bfd
, h
->root
.root
.root
.string
);
4422 BFD_ASSERT(gp
!= 0);
4426 case R_ALPHA_GPRELHIGH
:
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);
4437 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4441 /* A call to a dynamic symbol is definitely out of range of
4442 the 16-bit displacement. Don't bother writing anything. */
4443 if (dynamic_symbol_p
)
4448 /* The regular PC-relative stuff measures from the start of
4449 the instruction rather than the end. */
4453 case R_ALPHA_BRADDR
:
4454 if (dynamic_symbol_p
)
4457 /* xgettext:c-format */
4458 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4459 input_bfd
, h
->root
.root
.root
.string
);
4462 /* The regular PC-relative stuff measures from the start of
4463 the instruction rather than the end. */
4472 /* The regular PC-relative stuff measures from the start of
4473 the instruction rather than the end. */
4476 /* The source and destination gp must be the same. Note that
4477 the source will always have an assigned gp, since we forced
4478 one in check_relocs, but that the destination may not, as
4479 it might not have had any relocations at all. Also take
4480 care not to crash if H is an undefined symbol. */
4481 if (h
!= NULL
&& sec
!= NULL
4482 && alpha_elf_tdata (sec
->owner
)->gotobj
4483 && gotobj
!= alpha_elf_tdata (sec
->owner
)->gotobj
)
4486 /* xgettext:c-format */
4487 (_("%pB: change in gp: BRSGP %s"),
4488 input_bfd
, h
->root
.root
.root
.string
);
4492 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4494 other
= h
->root
.other
;
4496 other
= sym
->st_other
;
4497 switch (other
& STO_ALPHA_STD_GPLOAD
)
4499 case STO_ALPHA_NOPV
:
4501 case STO_ALPHA_STD_GPLOAD
:
4506 name
= h
->root
.root
.root
.string
;
4509 name
= (bfd_elf_string_from_elf_section
4510 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4512 name
= _("<unknown>");
4513 else if (name
[0] == 0)
4514 name
= bfd_section_name (sec
);
4517 /* xgettext:c-format */
4518 (_("%pB: !samegp reloc against symbol without .prologue: %s"),
4527 case R_ALPHA_REFLONG
:
4528 case R_ALPHA_REFQUAD
:
4529 case R_ALPHA_DTPREL64
:
4530 case R_ALPHA_TPREL64
:
4532 long dynindx
, dyntype
= r_type
;
4535 /* Careful here to remember RELATIVE relocations for global
4536 variables for symbolic shared objects. */
4538 if (dynamic_symbol_p
)
4540 BFD_ASSERT(h
->root
.dynindx
!= -1);
4541 dynindx
= h
->root
.dynindx
;
4543 addend
= 0, value
= 0;
4545 else if (r_type
== R_ALPHA_DTPREL64
)
4547 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4551 else if (r_type
== R_ALPHA_TPREL64
)
4553 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4554 if (!bfd_link_dll (info
))
4560 dynaddend
= value
- dtp_base
;
4562 else if (bfd_link_pic (info
)
4563 && r_symndx
!= STN_UNDEF
4564 && (input_section
->flags
& SEC_ALLOC
)
4566 && !(unresolved_reloc
4567 && (_bfd_elf_section_offset (output_bfd
, info
,
4572 if (r_type
== R_ALPHA_REFLONG
)
4575 /* xgettext:c-format */
4576 (_("%pB: unhandled dynamic relocation against %s"),
4578 h
->root
.root
.root
.string
);
4582 dyntype
= R_ALPHA_RELATIVE
;
4588 if (input_section
->flags
& SEC_ALLOC
)
4589 elf64_alpha_emit_dynrel (output_bfd
, info
, input_section
,
4590 srel
, rel
->r_offset
, dynindx
,
4591 dyntype
, dynaddend
);
4595 case R_ALPHA_SREL16
:
4596 case R_ALPHA_SREL32
:
4597 case R_ALPHA_SREL64
:
4598 if (dynamic_symbol_p
)
4601 /* xgettext:c-format */
4602 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4603 input_bfd
, h
->root
.root
.root
.string
);
4606 else if (bfd_link_pic (info
)
4610 /* xgettext:c-format */
4611 (_("%pB: pc-relative relocation against undefined weak symbol %s"),
4612 input_bfd
, h
->root
.root
.root
.string
);
4617 /* ??? .eh_frame references to discarded sections will be smashed
4618 to relocations against SHN_UNDEF. The .eh_frame format allows
4619 NULL to be encoded as 0 in any format, so this works here. */
4620 if (r_symndx
== STN_UNDEF
4621 || (unresolved_reloc
4622 && _bfd_elf_section_offset (output_bfd
, info
,
4624 rel
->r_offset
) == (bfd_vma
) -1))
4625 howto
= (elf64_alpha_howto_table
4626 + (r_type
- R_ALPHA_SREL32
+ R_ALPHA_REFLONG
));
4629 case R_ALPHA_TLSLDM
:
4630 /* Ignore the symbol for the relocation. The result is always
4631 the current module. */
4632 dynamic_symbol_p
= 0;
4636 if (!gotent
->reloc_done
)
4638 gotent
->reloc_done
= 1;
4640 /* Note that the module index for the main program is 1. */
4641 bfd_put_64 (output_bfd
,
4642 !bfd_link_pic (info
) && !dynamic_symbol_p
,
4643 sgot
->contents
+ gotent
->got_offset
);
4645 /* If the symbol has been forced local, output a
4646 DTPMOD64 reloc, otherwise it will be handled in
4647 finish_dynamic_symbol. */
4648 if (bfd_link_pic (info
) && !dynamic_symbol_p
)
4649 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4650 gotent
->got_offset
, 0,
4651 R_ALPHA_DTPMOD64
, 0);
4653 if (dynamic_symbol_p
|| r_type
== R_ALPHA_TLSLDM
)
4657 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4660 bfd_put_64 (output_bfd
, value
,
4661 sgot
->contents
+ gotent
->got_offset
+ 8);
4664 value
= (sgot
->output_section
->vma
4665 + sgot
->output_offset
4666 + gotent
->got_offset
);
4670 case R_ALPHA_DTPRELHI
:
4671 case R_ALPHA_DTPRELLO
:
4672 case R_ALPHA_DTPREL16
:
4673 if (dynamic_symbol_p
)
4676 /* xgettext:c-format */
4677 (_("%pB: dtp-relative relocation against dynamic symbol %s"),
4678 input_bfd
, h
->root
.root
.root
.string
);
4681 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4683 if (r_type
== R_ALPHA_DTPRELHI
)
4684 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4687 case R_ALPHA_TPRELHI
:
4688 case R_ALPHA_TPRELLO
:
4689 case R_ALPHA_TPREL16
:
4690 if (bfd_link_dll (info
))
4693 /* xgettext:c-format */
4694 (_("%pB: TLS local exec code cannot be linked into shared objects"),
4698 else if (dynamic_symbol_p
)
4701 /* xgettext:c-format */
4702 (_("%pB: tp-relative relocation against dynamic symbol %s"),
4703 input_bfd
, h
->root
.root
.root
.string
);
4706 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4708 if (r_type
== R_ALPHA_TPRELHI
)
4709 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4712 case R_ALPHA_GOTDTPREL
:
4713 case R_ALPHA_GOTTPREL
:
4714 BFD_ASSERT(sgot
!= NULL
);
4715 BFD_ASSERT(gp
!= 0);
4716 BFD_ASSERT(gotent
!= NULL
);
4717 BFD_ASSERT(gotent
->use_count
>= 1);
4719 if (!gotent
->reloc_done
)
4721 gotent
->reloc_done
= 1;
4723 if (dynamic_symbol_p
)
4727 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4728 if (r_type
== R_ALPHA_GOTDTPREL
)
4730 else if (bfd_link_executable (info
))
4734 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4735 gotent
->got_offset
, 0,
4741 bfd_put_64 (output_bfd
, value
,
4742 sgot
->contents
+ gotent
->got_offset
);
4745 value
= (sgot
->output_section
->vma
4746 + sgot
->output_offset
4747 + gotent
->got_offset
);
4753 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4754 contents
, rel
->r_offset
, value
, 0);
4763 case bfd_reloc_overflow
:
4767 /* Don't warn if the overflow is due to pc relative reloc
4768 against discarded section. Section optimization code should
4771 if (r_symndx
< symtab_hdr
->sh_info
4772 && sec
!= NULL
&& howto
->pc_relative
4773 && discarded_section (sec
))
4780 name
= (bfd_elf_string_from_elf_section
4781 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4785 name
= bfd_section_name (sec
);
4787 (*info
->callbacks
->reloc_overflow
)
4788 (info
, (h
? &h
->root
.root
: NULL
), name
, howto
->name
,
4789 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4794 case bfd_reloc_outofrange
:
4802 /* Finish up dynamic symbol handling. We set the contents of various
4803 dynamic sections here. */
4806 elf64_alpha_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
4807 struct elf_link_hash_entry
*h
,
4808 Elf_Internal_Sym
*sym
)
4810 struct alpha_elf_link_hash_entry
*ah
= (struct alpha_elf_link_hash_entry
*)h
;
4814 /* Fill in the .plt entry for this symbol. */
4815 asection
*splt
, *sgot
, *srel
;
4816 Elf_Internal_Rela outrel
;
4818 bfd_vma got_addr
, plt_addr
;
4820 struct alpha_elf_got_entry
*gotent
;
4822 BFD_ASSERT (h
->dynindx
!= -1);
4824 splt
= elf_hash_table (info
)->splt
;
4825 BFD_ASSERT (splt
!= NULL
);
4826 srel
= elf_hash_table (info
)->srelplt
;
4827 BFD_ASSERT (srel
!= NULL
);
4829 for (gotent
= ah
->got_entries
; gotent
; gotent
= gotent
->next
)
4830 if (gotent
->reloc_type
== R_ALPHA_LITERAL
4831 && gotent
->use_count
> 0)
4836 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4837 BFD_ASSERT (sgot
!= NULL
);
4839 BFD_ASSERT (gotent
->got_offset
!= -1);
4840 BFD_ASSERT (gotent
->plt_offset
!= -1);
4842 got_addr
= (sgot
->output_section
->vma
4843 + sgot
->output_offset
4844 + gotent
->got_offset
);
4845 plt_addr
= (splt
->output_section
->vma
4846 + splt
->output_offset
4847 + gotent
->plt_offset
);
4849 plt_index
= (gotent
->plt_offset
-PLT_HEADER_SIZE
) / PLT_ENTRY_SIZE
;
4851 /* Fill in the entry in the procedure linkage table. */
4852 if (elf64_alpha_use_secureplt
)
4854 disp
= (PLT_HEADER_SIZE
- 4) - (gotent
->plt_offset
+ 4);
4855 insn
= INSN_AD (INSN_BR
, 31, disp
);
4856 bfd_put_32 (output_bfd
, insn
,
4857 splt
->contents
+ gotent
->plt_offset
);
4859 plt_index
= ((gotent
->plt_offset
- NEW_PLT_HEADER_SIZE
)
4860 / NEW_PLT_ENTRY_SIZE
);
4864 disp
= -(gotent
->plt_offset
+ 4);
4865 insn
= INSN_AD (INSN_BR
, 28, disp
);
4866 bfd_put_32 (output_bfd
, insn
,
4867 splt
->contents
+ gotent
->plt_offset
);
4868 bfd_put_32 (output_bfd
, INSN_UNOP
,
4869 splt
->contents
+ gotent
->plt_offset
+ 4);
4870 bfd_put_32 (output_bfd
, INSN_UNOP
,
4871 splt
->contents
+ gotent
->plt_offset
+ 8);
4873 plt_index
= ((gotent
->plt_offset
- OLD_PLT_HEADER_SIZE
)
4874 / OLD_PLT_ENTRY_SIZE
);
4877 /* Fill in the entry in the .rela.plt section. */
4878 outrel
.r_offset
= got_addr
;
4879 outrel
.r_info
= ELF64_R_INFO(h
->dynindx
, R_ALPHA_JMP_SLOT
);
4880 outrel
.r_addend
= 0;
4882 loc
= srel
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
4883 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
4885 /* Fill in the entry in the .got. */
4886 bfd_put_64 (output_bfd
, plt_addr
,
4887 sgot
->contents
+ gotent
->got_offset
);
4890 else if (alpha_elf_dynamic_symbol_p (h
, info
))
4892 /* Fill in the dynamic relocations for this symbol's .got entries. */
4894 struct alpha_elf_got_entry
*gotent
;
4896 srel
= elf_hash_table (info
)->srelgot
;
4897 BFD_ASSERT (srel
!= NULL
);
4899 for (gotent
= ((struct alpha_elf_link_hash_entry
*) h
)->got_entries
;
4901 gotent
= gotent
->next
)
4906 if (gotent
->use_count
== 0)
4909 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4911 r_type
= gotent
->reloc_type
;
4914 case R_ALPHA_LITERAL
:
4915 r_type
= R_ALPHA_GLOB_DAT
;
4918 r_type
= R_ALPHA_DTPMOD64
;
4920 case R_ALPHA_GOTDTPREL
:
4921 r_type
= R_ALPHA_DTPREL64
;
4923 case R_ALPHA_GOTTPREL
:
4924 r_type
= R_ALPHA_TPREL64
;
4926 case R_ALPHA_TLSLDM
:
4931 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4932 gotent
->got_offset
, h
->dynindx
,
4933 r_type
, gotent
->addend
);
4935 if (gotent
->reloc_type
== R_ALPHA_TLSGD
)
4936 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4937 gotent
->got_offset
+ 8, h
->dynindx
,
4938 R_ALPHA_DTPREL64
, gotent
->addend
);
4942 /* Mark some specially defined symbols as absolute. */
4943 if (h
== elf_hash_table (info
)->hdynamic
4944 || h
== elf_hash_table (info
)->hgot
4945 || h
== elf_hash_table (info
)->hplt
)
4946 sym
->st_shndx
= SHN_ABS
;
4951 /* Finish up the dynamic sections. */
4954 elf64_alpha_finish_dynamic_sections (bfd
*output_bfd
,
4955 struct bfd_link_info
*info
)
4960 dynobj
= elf_hash_table (info
)->dynobj
;
4961 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4963 if (elf_hash_table (info
)->dynamic_sections_created
)
4965 asection
*splt
, *sgotplt
, *srelaplt
;
4966 Elf64_External_Dyn
*dyncon
, *dynconend
;
4967 bfd_vma plt_vma
, gotplt_vma
;
4969 splt
= elf_hash_table (info
)->splt
;
4970 srelaplt
= elf_hash_table (info
)->srelplt
;
4971 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
4973 plt_vma
= splt
->output_section
->vma
+ splt
->output_offset
;
4976 if (elf64_alpha_use_secureplt
)
4978 sgotplt
= elf_hash_table (info
)->sgotplt
;
4979 BFD_ASSERT (sgotplt
!= NULL
);
4980 if (sgotplt
->size
> 0)
4981 gotplt_vma
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
4984 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
4985 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4986 for (; dyncon
< dynconend
; dyncon
++)
4988 Elf_Internal_Dyn dyn
;
4990 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4996 = elf64_alpha_use_secureplt
? gotplt_vma
: plt_vma
;
4999 dyn
.d_un
.d_val
= srelaplt
? srelaplt
->size
: 0;
5002 dyn
.d_un
.d_ptr
= srelaplt
? (srelaplt
->output_section
->vma
5003 + srelaplt
->output_offset
) : 0;
5007 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5010 /* Initialize the plt header. */
5016 if (elf64_alpha_use_secureplt
)
5018 ofs
= gotplt_vma
- (plt_vma
+ PLT_HEADER_SIZE
);
5020 insn
= INSN_ABC (INSN_SUBQ
, 27, 28, 25);
5021 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5023 insn
= INSN_ABO (INSN_LDAH
, 28, 28, (ofs
+ 0x8000) >> 16);
5024 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5026 insn
= INSN_ABC (INSN_S4SUBQ
, 25, 25, 25);
5027 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5029 insn
= INSN_ABO (INSN_LDA
, 28, 28, ofs
);
5030 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5032 insn
= INSN_ABO (INSN_LDQ
, 27, 28, 0);
5033 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 16);
5035 insn
= INSN_ABC (INSN_ADDQ
, 25, 25, 25);
5036 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 20);
5038 insn
= INSN_ABO (INSN_LDQ
, 28, 28, 8);
5039 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 24);
5041 insn
= INSN_AB (INSN_JMP
, 31, 27);
5042 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 28);
5044 insn
= INSN_AD (INSN_BR
, 28, -PLT_HEADER_SIZE
);
5045 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 32);
5049 insn
= INSN_AD (INSN_BR
, 27, 0); /* br $27, .+4 */
5050 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5052 insn
= INSN_ABO (INSN_LDQ
, 27, 27, 12);
5053 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5056 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5058 insn
= INSN_AB (INSN_JMP
, 27, 27);
5059 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5061 /* The next two words will be filled in by ld.so. */
5062 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 16);
5063 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 24);
5066 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 0;
5073 /* We need to use a special link routine to handle the .mdebug section.
5074 We need to merge all instances of these sections together, not write
5075 them all out sequentially. */
5078 elf64_alpha_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5081 struct bfd_link_order
*p
;
5082 asection
*mdebug_sec
;
5083 struct ecoff_debug_info debug
;
5084 const struct ecoff_debug_swap
*swap
5085 = get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
5086 HDRR
*symhdr
= &debug
.symbolic_header
;
5087 void * mdebug_handle
= NULL
;
5088 struct alpha_elf_link_hash_table
* htab
;
5090 htab
= alpha_elf_hash_table (info
);
5094 /* Go through the sections and collect the mdebug information. */
5096 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
5098 if (strcmp (o
->name
, ".mdebug") == 0)
5100 struct extsym_info einfo
;
5102 /* We have found the .mdebug section in the output file.
5103 Look through all the link_orders comprising it and merge
5104 the information together. */
5105 symhdr
->magic
= swap
->sym_magic
;
5106 /* FIXME: What should the version stamp be? */
5108 symhdr
->ilineMax
= 0;
5112 symhdr
->isymMax
= 0;
5113 symhdr
->ioptMax
= 0;
5114 symhdr
->iauxMax
= 0;
5116 symhdr
->issExtMax
= 0;
5119 symhdr
->iextMax
= 0;
5121 /* We accumulate the debugging information itself in the
5122 debug_info structure. */
5124 debug
.external_dnr
= NULL
;
5125 debug
.external_pdr
= NULL
;
5126 debug
.external_sym
= NULL
;
5127 debug
.external_opt
= NULL
;
5128 debug
.external_aux
= NULL
;
5130 debug
.ssext
= debug
.ssext_end
= NULL
;
5131 debug
.external_fdr
= NULL
;
5132 debug
.external_rfd
= NULL
;
5133 debug
.external_ext
= debug
.external_ext_end
= NULL
;
5135 mdebug_handle
= bfd_ecoff_debug_init (abfd
, &debug
, swap
, info
);
5136 if (mdebug_handle
== NULL
)
5145 static const char * const name
[] =
5147 ".text", ".init", ".fini", ".data",
5148 ".rodata", ".sdata", ".sbss", ".bss"
5150 static const int sc
[] = { scText
, scInit
, scFini
, scData
,
5151 scRData
, scSData
, scSBss
, scBss
};
5154 esym
.cobol_main
= 0;
5158 esym
.asym
.iss
= issNil
;
5159 esym
.asym
.st
= stLocal
;
5160 esym
.asym
.reserved
= 0;
5161 esym
.asym
.index
= indexNil
;
5162 for (i
= 0; i
< 8; i
++)
5164 esym
.asym
.sc
= sc
[i
];
5165 s
= bfd_get_section_by_name (abfd
, name
[i
]);
5168 esym
.asym
.value
= s
->vma
;
5169 last
= s
->vma
+ s
->size
;
5172 esym
.asym
.value
= last
;
5174 if (! bfd_ecoff_debug_one_external (abfd
, &debug
, swap
,
5180 for (p
= o
->map_head
.link_order
;
5181 p
!= (struct bfd_link_order
*) NULL
;
5184 asection
*input_section
;
5186 const struct ecoff_debug_swap
*input_swap
;
5187 struct ecoff_debug_info input_debug
;
5191 if (p
->type
!= bfd_indirect_link_order
)
5193 if (p
->type
== bfd_data_link_order
)
5198 input_section
= p
->u
.indirect
.section
;
5199 input_bfd
= input_section
->owner
;
5201 if (! is_alpha_elf (input_bfd
))
5202 /* I don't know what a non ALPHA ELF bfd would be
5203 doing with a .mdebug section, but I don't really
5204 want to deal with it. */
5207 input_swap
= (get_elf_backend_data (input_bfd
)
5208 ->elf_backend_ecoff_debug_swap
);
5210 BFD_ASSERT (p
->size
== input_section
->size
);
5212 /* The ECOFF linking code expects that we have already
5213 read in the debugging information and set up an
5214 ecoff_debug_info structure, so we do that now. */
5215 if (!elf64_alpha_read_ecoff_info (input_bfd
, input_section
,
5219 if (! (bfd_ecoff_debug_accumulate
5220 (mdebug_handle
, abfd
, &debug
, swap
, input_bfd
,
5221 &input_debug
, input_swap
, info
)))
5224 /* Loop through the external symbols. For each one with
5225 interesting information, try to find the symbol in
5226 the linker global hash table and save the information
5227 for the output external symbols. */
5228 eraw_src
= (char *) input_debug
.external_ext
;
5229 eraw_end
= (eraw_src
5230 + (input_debug
.symbolic_header
.iextMax
5231 * input_swap
->external_ext_size
));
5233 eraw_src
< eraw_end
;
5234 eraw_src
+= input_swap
->external_ext_size
)
5238 struct alpha_elf_link_hash_entry
*h
;
5240 (*input_swap
->swap_ext_in
) (input_bfd
, eraw_src
, &ext
);
5241 if (ext
.asym
.sc
== scNil
5242 || ext
.asym
.sc
== scUndefined
5243 || ext
.asym
.sc
== scSUndefined
)
5246 name
= input_debug
.ssext
+ ext
.asym
.iss
;
5247 h
= alpha_elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
5248 if (h
== NULL
|| h
->esym
.ifd
!= -2)
5254 < input_debug
.symbolic_header
.ifdMax
);
5255 ext
.ifd
= input_debug
.ifdmap
[ext
.ifd
];
5261 /* Free up the information we just read. */
5262 free (input_debug
.line
);
5263 free (input_debug
.external_dnr
);
5264 free (input_debug
.external_pdr
);
5265 free (input_debug
.external_sym
);
5266 free (input_debug
.external_opt
);
5267 free (input_debug
.external_aux
);
5268 free (input_debug
.ss
);
5269 free (input_debug
.ssext
);
5270 free (input_debug
.external_fdr
);
5271 free (input_debug
.external_rfd
);
5272 free (input_debug
.external_ext
);
5274 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5275 elf_link_input_bfd ignores this section. */
5276 input_section
->flags
&=~ SEC_HAS_CONTENTS
;
5279 /* Build the external symbol information. */
5282 einfo
.debug
= &debug
;
5284 einfo
.failed
= FALSE
;
5285 elf_link_hash_traverse (elf_hash_table (info
),
5286 elf64_alpha_output_extsym
,
5291 /* Set the size of the .mdebug section. */
5292 o
->size
= bfd_ecoff_debug_size (abfd
, &debug
, swap
);
5294 /* Skip this section later on (I don't think this currently
5295 matters, but someday it might). */
5296 o
->map_head
.link_order
= (struct bfd_link_order
*) NULL
;
5302 /* Invoke the regular ELF backend linker to do all the work. */
5303 if (! bfd_elf_final_link (abfd
, info
))
5306 /* Now write out the computed sections. */
5308 /* The .got subsections... */
5310 bfd
*i
, *dynobj
= elf_hash_table(info
)->dynobj
;
5311 for (i
= htab
->got_list
;
5313 i
= alpha_elf_tdata(i
)->got_link_next
)
5317 /* elf_bfd_final_link already did everything in dynobj. */
5321 sgot
= alpha_elf_tdata(i
)->got
;
5322 if (! bfd_set_section_contents (abfd
, sgot
->output_section
,
5324 (file_ptr
) sgot
->output_offset
,
5330 if (mdebug_sec
!= (asection
*) NULL
)
5332 BFD_ASSERT (abfd
->output_has_begun
);
5333 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle
, abfd
, &debug
,
5335 mdebug_sec
->filepos
))
5338 bfd_ecoff_debug_free (mdebug_handle
, abfd
, &debug
, swap
, info
);
5344 static enum elf_reloc_type_class
5345 elf64_alpha_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5346 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5347 const Elf_Internal_Rela
*rela
)
5349 switch ((int) ELF64_R_TYPE (rela
->r_info
))
5351 case R_ALPHA_RELATIVE
:
5352 return reloc_class_relative
;
5353 case R_ALPHA_JMP_SLOT
:
5354 return reloc_class_plt
;
5356 return reloc_class_copy
;
5358 return reloc_class_normal
;
5362 static const struct bfd_elf_special_section elf64_alpha_special_sections
[] =
5364 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5365 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5366 { NULL
, 0, 0, 0, 0 }
5369 /* ECOFF swapping routines. These are used when dealing with the
5370 .mdebug section, which is in the ECOFF debugging format. Copied
5371 from elf32-mips.c. */
5372 static const struct ecoff_debug_swap
5373 elf64_alpha_ecoff_debug_swap
=
5375 /* Symbol table magic number. */
5377 /* Alignment of debugging information. E.g., 4. */
5379 /* Sizes of external symbolic information. */
5380 sizeof (struct hdr_ext
),
5381 sizeof (struct dnr_ext
),
5382 sizeof (struct pdr_ext
),
5383 sizeof (struct sym_ext
),
5384 sizeof (struct opt_ext
),
5385 sizeof (struct fdr_ext
),
5386 sizeof (struct rfd_ext
),
5387 sizeof (struct ext_ext
),
5388 /* Functions to swap in external symbolic data. */
5397 _bfd_ecoff_swap_tir_in
,
5398 _bfd_ecoff_swap_rndx_in
,
5399 /* Functions to swap out external symbolic data. */
5408 _bfd_ecoff_swap_tir_out
,
5409 _bfd_ecoff_swap_rndx_out
,
5410 /* Function to read in symbolic data. */
5411 elf64_alpha_read_ecoff_info
5414 /* Use a non-standard hash bucket size of 8. */
5416 static const struct elf_size_info alpha_elf_size_info
=
5418 sizeof (Elf64_External_Ehdr
),
5419 sizeof (Elf64_External_Phdr
),
5420 sizeof (Elf64_External_Shdr
),
5421 sizeof (Elf64_External_Rel
),
5422 sizeof (Elf64_External_Rela
),
5423 sizeof (Elf64_External_Sym
),
5424 sizeof (Elf64_External_Dyn
),
5425 sizeof (Elf_External_Note
),
5429 ELFCLASS64
, EV_CURRENT
,
5430 bfd_elf64_write_out_phdrs
,
5431 bfd_elf64_write_shdrs_and_ehdr
,
5432 bfd_elf64_checksum_contents
,
5433 bfd_elf64_write_relocs
,
5434 bfd_elf64_swap_symbol_in
,
5435 bfd_elf64_swap_symbol_out
,
5436 bfd_elf64_slurp_reloc_table
,
5437 bfd_elf64_slurp_symbol_table
,
5438 bfd_elf64_swap_dyn_in
,
5439 bfd_elf64_swap_dyn_out
,
5440 bfd_elf64_swap_reloc_in
,
5441 bfd_elf64_swap_reloc_out
,
5442 bfd_elf64_swap_reloca_in
,
5443 bfd_elf64_swap_reloca_out
5446 #define TARGET_LITTLE_SYM alpha_elf64_vec
5447 #define TARGET_LITTLE_NAME "elf64-alpha"
5448 #define ELF_ARCH bfd_arch_alpha
5449 #define ELF_TARGET_ID ALPHA_ELF_DATA
5450 #define ELF_MACHINE_CODE EM_ALPHA
5451 #define ELF_MAXPAGESIZE 0x10000
5452 #define ELF_COMMONPAGESIZE 0x2000
5454 #define bfd_elf64_bfd_link_hash_table_create \
5455 elf64_alpha_bfd_link_hash_table_create
5457 #define bfd_elf64_bfd_reloc_type_lookup \
5458 elf64_alpha_bfd_reloc_type_lookup
5459 #define bfd_elf64_bfd_reloc_name_lookup \
5460 elf64_alpha_bfd_reloc_name_lookup
5461 #define elf_info_to_howto \
5462 elf64_alpha_info_to_howto
5464 #define bfd_elf64_mkobject \
5465 elf64_alpha_mkobject
5466 #define elf_backend_object_p \
5467 elf64_alpha_object_p
5469 #define elf_backend_section_from_shdr \
5470 elf64_alpha_section_from_shdr
5471 #define elf_backend_section_flags \
5472 elf64_alpha_section_flags
5473 #define elf_backend_fake_sections \
5474 elf64_alpha_fake_sections
5476 #define bfd_elf64_bfd_is_local_label_name \
5477 elf64_alpha_is_local_label_name
5478 #define bfd_elf64_find_nearest_line \
5479 elf64_alpha_find_nearest_line
5480 #define bfd_elf64_bfd_relax_section \
5481 elf64_alpha_relax_section
5483 #define elf_backend_add_symbol_hook \
5484 elf64_alpha_add_symbol_hook
5485 #define elf_backend_relocs_compatible \
5486 _bfd_elf_relocs_compatible
5487 #define elf_backend_sort_relocs_p \
5488 elf64_alpha_sort_relocs_p
5489 #define elf_backend_check_relocs \
5490 elf64_alpha_check_relocs
5491 #define elf_backend_create_dynamic_sections \
5492 elf64_alpha_create_dynamic_sections
5493 #define elf_backend_adjust_dynamic_symbol \
5494 elf64_alpha_adjust_dynamic_symbol
5495 #define elf_backend_merge_symbol_attribute \
5496 elf64_alpha_merge_symbol_attribute
5497 #define elf_backend_copy_indirect_symbol \
5498 elf64_alpha_copy_indirect_symbol
5499 #define elf_backend_always_size_sections \
5500 elf64_alpha_always_size_sections
5501 #define elf_backend_size_dynamic_sections \
5502 elf64_alpha_size_dynamic_sections
5503 #define elf_backend_omit_section_dynsym \
5504 _bfd_elf_omit_section_dynsym_all
5505 #define elf_backend_relocate_section \
5506 elf64_alpha_relocate_section
5507 #define elf_backend_finish_dynamic_symbol \
5508 elf64_alpha_finish_dynamic_symbol
5509 #define elf_backend_finish_dynamic_sections \
5510 elf64_alpha_finish_dynamic_sections
5511 #define bfd_elf64_bfd_final_link \
5512 elf64_alpha_final_link
5513 #define elf_backend_reloc_type_class \
5514 elf64_alpha_reloc_type_class
5516 #define elf_backend_can_gc_sections 1
5517 #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
5519 #define elf_backend_ecoff_debug_swap \
5520 &elf64_alpha_ecoff_debug_swap
5522 #define elf_backend_size_info \
5525 #define elf_backend_special_sections \
5526 elf64_alpha_special_sections
5528 /* A few constants that determine how the .plt section is set up. */
5529 #define elf_backend_want_got_plt 0
5530 #define elf_backend_plt_readonly 0
5531 #define elf_backend_want_plt_sym 1
5532 #define elf_backend_got_header_size 0
5533 #define elf_backend_dtrel_excludes_plt 1
5535 #include "elf64-target.h"
5537 /* FreeBSD support. */
5539 #undef TARGET_LITTLE_SYM
5540 #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
5541 #undef TARGET_LITTLE_NAME
5542 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5544 #define ELF_OSABI ELFOSABI_FREEBSD
5546 /* The kernel recognizes executables as valid only if they carry a
5547 "FreeBSD" label in the ELF header. So we put this label on all
5548 executables and (for simplicity) also all other object files. */
5551 elf64_alpha_fbsd_init_file_header (bfd
*abfd
, struct bfd_link_info
*info
)
5553 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
5555 if (!_bfd_elf_init_file_header (abfd
, info
))
5558 i_ehdrp
= elf_elfheader (abfd
);
5560 /* Put an ABI label supported by FreeBSD >= 4.1. */
5561 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
5562 #ifdef OLD_FREEBSD_ABI_LABEL
5563 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5564 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5569 #undef elf_backend_init_file_header
5570 #define elf_backend_init_file_header \
5571 elf64_alpha_fbsd_init_file_header
5574 #define elf64_bed elf64_alpha_fbsd_bed
5576 #include "elf64-target.h"