1 /* Alpha specific support for 64-bit ELF
2 Copyright (C) 1996-2020 Free Software Foundation, Inc.
3 Contributed by Richard Henderson <rth@tamu.edu>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
23 /* We need a published ABI spec for this. Until one comes out, don't
24 assume this'll remain unchanged forever. */
30 #include "ecoff-bfd.h"
32 #include "elf/alpha.h"
36 #define NO_COFF_RELOCS
37 #define NO_COFF_SYMBOLS
38 #define NO_COFF_LINENOS
40 /* Get the ECOFF swapping routines. Needed for the debug information. */
41 #include "coff/internal.h"
43 #include "coff/symconst.h"
44 #include "coff/ecoff.h"
45 #include "coff/alpha.h"
50 #include "ecoffswap.h"
53 /* Instruction data for plt generation and relaxation. */
61 #define INSN_LDA (OP_LDA << 26)
62 #define INSN_LDAH (OP_LDAH << 26)
63 #define INSN_LDQ (OP_LDQ << 26)
64 #define INSN_BR (OP_BR << 26)
66 #define INSN_ADDQ 0x40000400
67 #define INSN_RDUNIQ 0x0000009e
68 #define INSN_SUBQ 0x40000520
69 #define INSN_S4SUBQ 0x40000560
70 #define INSN_UNOP 0x2ffe0000
72 #define INSN_JSR 0x68004000
73 #define INSN_JMP 0x68000000
74 #define INSN_JSR_MASK 0xfc00c000
76 #define INSN_A(I,A) (I | (A << 21))
77 #define INSN_AB(I,A,B) (I | (A << 21) | (B << 16))
78 #define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C)
79 #define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff))
80 #define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff))
84 /* Set by ld emulation. Putting this into the link_info or hash structure
85 is simply working too hard. */
87 bfd_boolean elf64_alpha_use_secureplt
= TRUE
;
89 bfd_boolean elf64_alpha_use_secureplt
= FALSE
;
92 #define OLD_PLT_HEADER_SIZE 32
93 #define OLD_PLT_ENTRY_SIZE 12
94 #define NEW_PLT_HEADER_SIZE 36
95 #define NEW_PLT_ENTRY_SIZE 4
97 #define PLT_HEADER_SIZE \
98 (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
99 #define PLT_ENTRY_SIZE \
100 (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
102 #define MAX_GOT_SIZE (64*1024)
104 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
107 /* Used to implement multiple .got subsections. */
108 struct alpha_elf_got_entry
110 struct alpha_elf_got_entry
*next
;
112 /* Which .got subsection? */
115 /* The addend in effect for this entry. */
118 /* The .got offset for this entry. */
121 /* The .plt offset for this entry. */
124 /* How many references to this entry? */
127 /* The relocation type of this entry. */
128 unsigned char reloc_type
;
130 /* How a LITERAL is used. */
133 /* Have we initialized the dynamic relocation for this entry? */
134 unsigned char reloc_done
;
136 /* Have we adjusted this entry for SEC_MERGE? */
137 unsigned char reloc_xlated
;
140 struct alpha_elf_reloc_entry
142 struct alpha_elf_reloc_entry
*next
;
144 /* Which .reloc section? */
147 /* Which section this relocation is against? */
150 /* How many did we find? */
153 /* What kind of relocation? */
157 struct alpha_elf_link_hash_entry
159 struct elf_link_hash_entry root
;
161 /* External symbol information. */
164 /* Cumulative flags for all the .got entries. */
167 /* Contexts in which a literal was referenced. */
168 #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
169 #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
170 #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
171 #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
172 #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
173 #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
174 #define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
175 #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
176 #define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
178 /* Used to implement multiple .got subsections. */
179 struct alpha_elf_got_entry
*got_entries
;
181 /* Used to count non-got, non-plt relocations for delayed sizing
182 of relocation sections. */
183 struct alpha_elf_reloc_entry
*reloc_entries
;
186 /* Alpha ELF linker hash table. */
188 struct alpha_elf_link_hash_table
190 struct elf_link_hash_table root
;
192 /* The head of a list of .got subsections linked through
193 alpha_elf_tdata(abfd)->got_link_next. */
196 /* The most recent relax pass that we've seen. The GOTs
197 should be regenerated if this doesn't match. */
201 /* Look up an entry in a Alpha ELF linker hash table. */
203 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
204 ((struct alpha_elf_link_hash_entry *) \
205 elf_link_hash_lookup (&(table)->root, (string), (create), \
208 /* Traverse a Alpha ELF linker hash table. */
210 #define alpha_elf_link_hash_traverse(table, func, info) \
211 (elf_link_hash_traverse \
213 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
216 /* Get the Alpha ELF linker hash table from a link_info structure. */
218 #define alpha_elf_hash_table(p) \
219 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
220 == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL)
222 /* Get the object's symbols as our own entry type. */
224 #define alpha_elf_sym_hashes(abfd) \
225 ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
227 /* Should we do dynamic things to this symbol? This differs from the
228 generic version in that we never need to consider function pointer
229 equality wrt PLT entries -- we don't create a PLT entry if a symbol's
230 address is ever taken. */
232 static inline bfd_boolean
233 alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
234 struct bfd_link_info
*info
)
236 return _bfd_elf_dynamic_symbol_p (h
, info
, 0);
239 /* Create an entry in a Alpha ELF linker hash table. */
241 static struct bfd_hash_entry
*
242 elf64_alpha_link_hash_newfunc (struct bfd_hash_entry
*entry
,
243 struct bfd_hash_table
*table
,
246 struct alpha_elf_link_hash_entry
*ret
=
247 (struct alpha_elf_link_hash_entry
*) entry
;
249 /* Allocate the structure if it has not already been allocated by a
251 if (ret
== (struct alpha_elf_link_hash_entry
*) NULL
)
252 ret
= ((struct alpha_elf_link_hash_entry
*)
253 bfd_hash_allocate (table
,
254 sizeof (struct alpha_elf_link_hash_entry
)));
255 if (ret
== (struct alpha_elf_link_hash_entry
*) NULL
)
256 return (struct bfd_hash_entry
*) ret
;
258 /* Call the allocation method of the superclass. */
259 ret
= ((struct alpha_elf_link_hash_entry
*)
260 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
262 if (ret
!= (struct alpha_elf_link_hash_entry
*) NULL
)
264 /* Set local fields. */
265 memset (&ret
->esym
, 0, sizeof (EXTR
));
266 /* We use -2 as a marker to indicate that the information has
267 not been set. -1 means there is no associated ifd. */
270 ret
->got_entries
= NULL
;
271 ret
->reloc_entries
= NULL
;
274 return (struct bfd_hash_entry
*) ret
;
277 /* Create a Alpha ELF linker hash table. */
279 static struct bfd_link_hash_table
*
280 elf64_alpha_bfd_link_hash_table_create (bfd
*abfd
)
282 struct alpha_elf_link_hash_table
*ret
;
283 size_t amt
= sizeof (struct alpha_elf_link_hash_table
);
285 ret
= (struct alpha_elf_link_hash_table
*) bfd_zmalloc (amt
);
286 if (ret
== (struct alpha_elf_link_hash_table
*) NULL
)
289 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
290 elf64_alpha_link_hash_newfunc
,
291 sizeof (struct alpha_elf_link_hash_entry
),
298 return &ret
->root
.root
;
301 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
302 routine in order to handle the ECOFF debugging information. */
304 struct alpha_elf_find_line
306 struct ecoff_debug_info d
;
307 struct ecoff_find_line i
;
310 /* We have some private fields hanging off of the elf_tdata structure. */
312 struct alpha_elf_obj_tdata
314 struct elf_obj_tdata root
;
316 /* For every input file, these are the got entries for that object's
318 struct alpha_elf_got_entry
** local_got_entries
;
320 /* For every input file, this is the object that owns the got that
321 this input file uses. */
324 /* For every got, this is a linked list through the objects using this got */
325 bfd
*in_got_link_next
;
327 /* For every got, this is a link to the next got subsegment. */
330 /* For every got, this is the section. */
333 /* For every got, this is it's total number of words. */
336 /* For every got, this is the sum of the number of words required
337 to hold all of the member object's local got. */
340 /* Used by elf64_alpha_find_nearest_line entry point. */
341 struct alpha_elf_find_line
*find_line_info
;
345 #define alpha_elf_tdata(abfd) \
346 ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
348 #define is_alpha_elf(bfd) \
349 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
350 && elf_tdata (bfd) != NULL \
351 && elf_object_id (bfd) == ALPHA_ELF_DATA)
354 elf64_alpha_mkobject (bfd
*abfd
)
356 return bfd_elf_allocate_object (abfd
, sizeof (struct alpha_elf_obj_tdata
),
361 elf64_alpha_object_p (bfd
*abfd
)
363 /* Set the right machine number for an Alpha ELF file. */
364 return bfd_default_set_arch_mach (abfd
, bfd_arch_alpha
, 0);
367 /* A relocation function which doesn't do anything. */
369 static bfd_reloc_status_type
370 elf64_alpha_reloc_nil (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*reloc
,
371 asymbol
*sym ATTRIBUTE_UNUSED
,
372 void * data ATTRIBUTE_UNUSED
, asection
*sec
,
373 bfd
*output_bfd
, char **error_message ATTRIBUTE_UNUSED
)
376 reloc
->address
+= sec
->output_offset
;
380 /* A relocation function used for an unsupported reloc. */
382 static bfd_reloc_status_type
383 elf64_alpha_reloc_bad (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*reloc
,
384 asymbol
*sym ATTRIBUTE_UNUSED
,
385 void * data ATTRIBUTE_UNUSED
, asection
*sec
,
386 bfd
*output_bfd
, char **error_message ATTRIBUTE_UNUSED
)
389 reloc
->address
+= sec
->output_offset
;
390 return bfd_reloc_notsupported
;
393 /* Do the work of the GPDISP relocation. */
395 static bfd_reloc_status_type
396 elf64_alpha_do_reloc_gpdisp (bfd
*abfd
, bfd_vma gpdisp
, bfd_byte
*p_ldah
,
399 bfd_reloc_status_type ret
= bfd_reloc_ok
;
401 unsigned long i_ldah
, i_lda
;
403 i_ldah
= bfd_get_32 (abfd
, p_ldah
);
404 i_lda
= bfd_get_32 (abfd
, p_lda
);
406 /* Complain if the instructions are not correct. */
407 if (((i_ldah
>> 26) & 0x3f) != 0x09
408 || ((i_lda
>> 26) & 0x3f) != 0x08)
409 ret
= bfd_reloc_dangerous
;
411 /* Extract the user-supplied offset, mirroring the sign extensions
412 that the instructions perform. */
413 addend
= ((i_ldah
& 0xffff) << 16) | (i_lda
& 0xffff);
414 addend
= (addend
^ 0x80008000) - 0x80008000;
418 if ((bfd_signed_vma
) gpdisp
< -(bfd_signed_vma
) 0x80000000
419 || (bfd_signed_vma
) gpdisp
>= (bfd_signed_vma
) 0x7fff8000)
420 ret
= bfd_reloc_overflow
;
422 /* compensate for the sign extension again. */
423 i_ldah
= ((i_ldah
& 0xffff0000)
424 | (((gpdisp
>> 16) + ((gpdisp
>> 15) & 1)) & 0xffff));
425 i_lda
= (i_lda
& 0xffff0000) | (gpdisp
& 0xffff);
427 bfd_put_32 (abfd
, (bfd_vma
) i_ldah
, p_ldah
);
428 bfd_put_32 (abfd
, (bfd_vma
) i_lda
, p_lda
);
433 /* The special function for the GPDISP reloc. */
435 static bfd_reloc_status_type
436 elf64_alpha_reloc_gpdisp (bfd
*abfd
, arelent
*reloc_entry
,
437 asymbol
*sym ATTRIBUTE_UNUSED
, void * data
,
438 asection
*input_section
, bfd
*output_bfd
,
441 bfd_reloc_status_type ret
;
442 bfd_vma gp
, relocation
;
443 bfd_vma high_address
;
444 bfd_byte
*p_ldah
, *p_lda
;
446 /* Don't do anything if we're not doing a final link. */
449 reloc_entry
->address
+= input_section
->output_offset
;
453 high_address
= bfd_get_section_limit (abfd
, input_section
);
454 if (reloc_entry
->address
> high_address
455 || reloc_entry
->address
+ reloc_entry
->addend
> high_address
)
456 return bfd_reloc_outofrange
;
458 /* The gp used in the portion of the output object to which this
459 input object belongs is cached on the input bfd. */
460 gp
= _bfd_get_gp_value (abfd
);
462 relocation
= (input_section
->output_section
->vma
463 + input_section
->output_offset
464 + reloc_entry
->address
);
466 p_ldah
= (bfd_byte
*) data
+ reloc_entry
->address
;
467 p_lda
= p_ldah
+ reloc_entry
->addend
;
469 ret
= elf64_alpha_do_reloc_gpdisp (abfd
, gp
- relocation
, p_ldah
, p_lda
);
471 /* Complain if the instructions are not correct. */
472 if (ret
== bfd_reloc_dangerous
)
473 *err_msg
= _("GPDISP relocation did not find ldah and lda instructions");
478 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
479 from smaller values. Start with zero, widen, *then* decrement. */
480 #define MINUS_ONE (((bfd_vma)0) - 1)
483 #define SKIP_HOWTO(N) \
484 HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
486 static reloc_howto_type elf64_alpha_howto_table
[] =
488 HOWTO (R_ALPHA_NONE
, /* type */
490 3, /* size (0 = byte, 1 = short, 2 = long) */
492 TRUE
, /* pc_relative */
494 complain_overflow_dont
, /* complain_on_overflow */
495 elf64_alpha_reloc_nil
, /* special_function */
497 FALSE
, /* partial_inplace */
500 TRUE
), /* pcrel_offset */
502 /* A 32 bit reference to a symbol. */
503 HOWTO (R_ALPHA_REFLONG
, /* type */
505 2, /* size (0 = byte, 1 = short, 2 = long) */
507 FALSE
, /* pc_relative */
509 complain_overflow_bitfield
, /* complain_on_overflow */
510 bfd_elf_generic_reloc
, /* special_function */
511 "REFLONG", /* name */
512 FALSE
, /* partial_inplace */
513 0xffffffff, /* src_mask */
514 0xffffffff, /* dst_mask */
515 FALSE
), /* pcrel_offset */
517 /* A 64 bit reference to a symbol. */
518 HOWTO (R_ALPHA_REFQUAD
, /* type */
520 4, /* size (0 = byte, 1 = short, 2 = long) */
522 FALSE
, /* pc_relative */
524 complain_overflow_bitfield
, /* complain_on_overflow */
525 bfd_elf_generic_reloc
, /* special_function */
526 "REFQUAD", /* name */
527 FALSE
, /* partial_inplace */
528 MINUS_ONE
, /* src_mask */
529 MINUS_ONE
, /* dst_mask */
530 FALSE
), /* pcrel_offset */
532 /* A 32 bit GP relative offset. This is just like REFLONG except
533 that when the value is used the value of the gp register will be
535 HOWTO (R_ALPHA_GPREL32
, /* type */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
539 FALSE
, /* pc_relative */
541 complain_overflow_bitfield
, /* complain_on_overflow */
542 bfd_elf_generic_reloc
, /* special_function */
543 "GPREL32", /* name */
544 FALSE
, /* partial_inplace */
545 0xffffffff, /* src_mask */
546 0xffffffff, /* dst_mask */
547 FALSE
), /* pcrel_offset */
549 /* Used for an instruction that refers to memory off the GP register. */
550 HOWTO (R_ALPHA_LITERAL
, /* type */
552 1, /* size (0 = byte, 1 = short, 2 = long) */
554 FALSE
, /* pc_relative */
556 complain_overflow_signed
, /* complain_on_overflow */
557 bfd_elf_generic_reloc
, /* special_function */
558 "ELF_LITERAL", /* name */
559 FALSE
, /* partial_inplace */
560 0xffff, /* src_mask */
561 0xffff, /* dst_mask */
562 FALSE
), /* pcrel_offset */
564 /* This reloc only appears immediately following an ELF_LITERAL reloc.
565 It identifies a use of the literal. The symbol index is special:
566 1 means the literal address is in the base register of a memory
567 format instruction; 2 means the literal address is in the byte
568 offset register of a byte-manipulation instruction; 3 means the
569 literal address is in the target register of a jsr instruction.
570 This does not actually do any relocation. */
571 HOWTO (R_ALPHA_LITUSE
, /* type */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
575 FALSE
, /* pc_relative */
577 complain_overflow_dont
, /* complain_on_overflow */
578 elf64_alpha_reloc_nil
, /* special_function */
580 FALSE
, /* partial_inplace */
583 FALSE
), /* pcrel_offset */
585 /* Load the gp register. This is always used for a ldah instruction
586 which loads the upper 16 bits of the gp register. The symbol
587 index of the GPDISP instruction is an offset in bytes to the lda
588 instruction that loads the lower 16 bits. The value to use for
589 the relocation is the difference between the GP value and the
590 current location; the load will always be done against a register
591 holding the current address.
593 NOTE: Unlike ECOFF, partial in-place relocation is not done. If
594 any offset is present in the instructions, it is an offset from
595 the register to the ldah instruction. This lets us avoid any
596 stupid hackery like inventing a gp value to do partial relocation
597 against. Also unlike ECOFF, we do the whole relocation off of
598 the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
599 space consuming bit, that, since all the information was present
600 in the GPDISP_HI16 reloc. */
601 HOWTO (R_ALPHA_GPDISP
, /* type */
603 2, /* size (0 = byte, 1 = short, 2 = long) */
605 FALSE
, /* pc_relative */
607 complain_overflow_dont
, /* complain_on_overflow */
608 elf64_alpha_reloc_gpdisp
, /* special_function */
610 FALSE
, /* partial_inplace */
611 0xffff, /* src_mask */
612 0xffff, /* dst_mask */
613 TRUE
), /* pcrel_offset */
615 /* A 21 bit branch. */
616 HOWTO (R_ALPHA_BRADDR
, /* type */
618 2, /* size (0 = byte, 1 = short, 2 = long) */
620 TRUE
, /* pc_relative */
622 complain_overflow_signed
, /* complain_on_overflow */
623 bfd_elf_generic_reloc
, /* special_function */
625 FALSE
, /* partial_inplace */
626 0x1fffff, /* src_mask */
627 0x1fffff, /* dst_mask */
628 TRUE
), /* pcrel_offset */
630 /* A hint for a jump to a register. */
631 HOWTO (R_ALPHA_HINT
, /* type */
633 1, /* size (0 = byte, 1 = short, 2 = long) */
635 TRUE
, /* pc_relative */
637 complain_overflow_dont
, /* complain_on_overflow */
638 bfd_elf_generic_reloc
, /* special_function */
640 FALSE
, /* partial_inplace */
641 0x3fff, /* src_mask */
642 0x3fff, /* dst_mask */
643 TRUE
), /* pcrel_offset */
645 /* 16 bit PC relative offset. */
646 HOWTO (R_ALPHA_SREL16
, /* type */
648 1, /* size (0 = byte, 1 = short, 2 = long) */
650 TRUE
, /* pc_relative */
652 complain_overflow_signed
, /* complain_on_overflow */
653 bfd_elf_generic_reloc
, /* special_function */
655 FALSE
, /* partial_inplace */
656 0xffff, /* src_mask */
657 0xffff, /* dst_mask */
658 TRUE
), /* pcrel_offset */
660 /* 32 bit PC relative offset. */
661 HOWTO (R_ALPHA_SREL32
, /* type */
663 2, /* size (0 = byte, 1 = short, 2 = long) */
665 TRUE
, /* pc_relative */
667 complain_overflow_signed
, /* complain_on_overflow */
668 bfd_elf_generic_reloc
, /* special_function */
670 FALSE
, /* partial_inplace */
671 0xffffffff, /* src_mask */
672 0xffffffff, /* dst_mask */
673 TRUE
), /* pcrel_offset */
675 /* A 64 bit PC relative offset. */
676 HOWTO (R_ALPHA_SREL64
, /* type */
678 4, /* size (0 = byte, 1 = short, 2 = long) */
680 TRUE
, /* pc_relative */
682 complain_overflow_signed
, /* complain_on_overflow */
683 bfd_elf_generic_reloc
, /* special_function */
685 FALSE
, /* partial_inplace */
686 MINUS_ONE
, /* src_mask */
687 MINUS_ONE
, /* dst_mask */
688 TRUE
), /* pcrel_offset */
690 /* Skip 12 - 16; deprecated ECOFF relocs. */
697 /* The high 16 bits of the displacement from GP to the target. */
698 HOWTO (R_ALPHA_GPRELHIGH
,
700 1, /* size (0 = byte, 1 = short, 2 = long) */
702 FALSE
, /* pc_relative */
704 complain_overflow_signed
, /* complain_on_overflow */
705 bfd_elf_generic_reloc
, /* special_function */
706 "GPRELHIGH", /* name */
707 FALSE
, /* partial_inplace */
708 0xffff, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE
), /* pcrel_offset */
712 /* The low 16 bits of the displacement from GP to the target. */
713 HOWTO (R_ALPHA_GPRELLOW
,
715 1, /* size (0 = byte, 1 = short, 2 = long) */
717 FALSE
, /* pc_relative */
719 complain_overflow_dont
, /* complain_on_overflow */
720 bfd_elf_generic_reloc
, /* special_function */
721 "GPRELLOW", /* name */
722 FALSE
, /* partial_inplace */
723 0xffff, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE
), /* pcrel_offset */
727 /* A 16-bit displacement from the GP to the target. */
728 HOWTO (R_ALPHA_GPREL16
,
730 1, /* size (0 = byte, 1 = short, 2 = long) */
732 FALSE
, /* pc_relative */
734 complain_overflow_signed
, /* complain_on_overflow */
735 bfd_elf_generic_reloc
, /* special_function */
736 "GPREL16", /* name */
737 FALSE
, /* partial_inplace */
738 0xffff, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE
), /* pcrel_offset */
742 /* Skip 20 - 23; deprecated ECOFF relocs. */
748 /* Misc ELF relocations. */
750 /* A dynamic relocation to copy the target into our .dynbss section. */
751 /* Not generated, as all Alpha objects use PIC, so it is not needed. It
752 is present because every other ELF has one, but should not be used
753 because .dynbss is an ugly thing. */
760 complain_overflow_dont
,
761 bfd_elf_generic_reloc
,
768 /* A dynamic relocation for a .got entry. */
769 HOWTO (R_ALPHA_GLOB_DAT
,
775 complain_overflow_dont
,
776 bfd_elf_generic_reloc
,
783 /* A dynamic relocation for a .plt entry. */
784 HOWTO (R_ALPHA_JMP_SLOT
,
790 complain_overflow_dont
,
791 bfd_elf_generic_reloc
,
798 /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
799 HOWTO (R_ALPHA_RELATIVE
,
805 complain_overflow_dont
,
806 bfd_elf_generic_reloc
,
813 /* A 21 bit branch that adjusts for gp loads. */
814 HOWTO (R_ALPHA_BRSGP
, /* type */
816 2, /* size (0 = byte, 1 = short, 2 = long) */
818 TRUE
, /* pc_relative */
820 complain_overflow_signed
, /* complain_on_overflow */
821 bfd_elf_generic_reloc
, /* special_function */
823 FALSE
, /* partial_inplace */
824 0x1fffff, /* src_mask */
825 0x1fffff, /* dst_mask */
826 TRUE
), /* pcrel_offset */
828 /* Creates a tls_index for the symbol in the got. */
829 HOWTO (R_ALPHA_TLSGD
, /* type */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
833 FALSE
, /* pc_relative */
835 complain_overflow_signed
, /* complain_on_overflow */
836 bfd_elf_generic_reloc
, /* special_function */
838 FALSE
, /* partial_inplace */
839 0xffff, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE
), /* pcrel_offset */
843 /* Creates a tls_index for the (current) module in the got. */
844 HOWTO (R_ALPHA_TLSLDM
, /* type */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
848 FALSE
, /* pc_relative */
850 complain_overflow_signed
, /* complain_on_overflow */
851 bfd_elf_generic_reloc
, /* special_function */
853 FALSE
, /* partial_inplace */
854 0xffff, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE
), /* pcrel_offset */
858 /* A dynamic relocation for a DTP module entry. */
859 HOWTO (R_ALPHA_DTPMOD64
, /* type */
861 4, /* size (0 = byte, 1 = short, 2 = long) */
863 FALSE
, /* pc_relative */
865 complain_overflow_bitfield
, /* complain_on_overflow */
866 bfd_elf_generic_reloc
, /* special_function */
867 "DTPMOD64", /* name */
868 FALSE
, /* partial_inplace */
869 MINUS_ONE
, /* src_mask */
870 MINUS_ONE
, /* dst_mask */
871 FALSE
), /* pcrel_offset */
873 /* Creates a 64-bit offset in the got for the displacement
874 from DTP to the target. */
875 HOWTO (R_ALPHA_GOTDTPREL
, /* type */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
879 FALSE
, /* pc_relative */
881 complain_overflow_signed
, /* complain_on_overflow */
882 bfd_elf_generic_reloc
, /* special_function */
883 "GOTDTPREL", /* name */
884 FALSE
, /* partial_inplace */
885 0xffff, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE
), /* pcrel_offset */
889 /* A dynamic relocation for a displacement from DTP to the target. */
890 HOWTO (R_ALPHA_DTPREL64
, /* type */
892 4, /* size (0 = byte, 1 = short, 2 = long) */
894 FALSE
, /* pc_relative */
896 complain_overflow_bitfield
, /* complain_on_overflow */
897 bfd_elf_generic_reloc
, /* special_function */
898 "DTPREL64", /* name */
899 FALSE
, /* partial_inplace */
900 MINUS_ONE
, /* src_mask */
901 MINUS_ONE
, /* dst_mask */
902 FALSE
), /* pcrel_offset */
904 /* The high 16 bits of the displacement from DTP to the target. */
905 HOWTO (R_ALPHA_DTPRELHI
, /* type */
907 1, /* size (0 = byte, 1 = short, 2 = long) */
909 FALSE
, /* pc_relative */
911 complain_overflow_signed
, /* complain_on_overflow */
912 bfd_elf_generic_reloc
, /* special_function */
913 "DTPRELHI", /* name */
914 FALSE
, /* partial_inplace */
915 0xffff, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE
), /* pcrel_offset */
919 /* The low 16 bits of the displacement from DTP to the target. */
920 HOWTO (R_ALPHA_DTPRELLO
, /* type */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
924 FALSE
, /* pc_relative */
926 complain_overflow_dont
, /* complain_on_overflow */
927 bfd_elf_generic_reloc
, /* special_function */
928 "DTPRELLO", /* name */
929 FALSE
, /* partial_inplace */
930 0xffff, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE
), /* pcrel_offset */
934 /* A 16-bit displacement from DTP to the target. */
935 HOWTO (R_ALPHA_DTPREL16
, /* type */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
939 FALSE
, /* pc_relative */
941 complain_overflow_signed
, /* complain_on_overflow */
942 bfd_elf_generic_reloc
, /* special_function */
943 "DTPREL16", /* name */
944 FALSE
, /* partial_inplace */
945 0xffff, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE
), /* pcrel_offset */
949 /* Creates a 64-bit offset in the got for the displacement
950 from TP to the target. */
951 HOWTO (R_ALPHA_GOTTPREL
, /* type */
953 1, /* size (0 = byte, 1 = short, 2 = long) */
955 FALSE
, /* pc_relative */
957 complain_overflow_signed
, /* complain_on_overflow */
958 bfd_elf_generic_reloc
, /* special_function */
959 "GOTTPREL", /* name */
960 FALSE
, /* partial_inplace */
961 0xffff, /* src_mask */
962 0xffff, /* dst_mask */
963 FALSE
), /* pcrel_offset */
965 /* A dynamic relocation for a displacement from TP to the target. */
966 HOWTO (R_ALPHA_TPREL64
, /* type */
968 4, /* size (0 = byte, 1 = short, 2 = long) */
970 FALSE
, /* pc_relative */
972 complain_overflow_bitfield
, /* complain_on_overflow */
973 bfd_elf_generic_reloc
, /* special_function */
974 "TPREL64", /* name */
975 FALSE
, /* partial_inplace */
976 MINUS_ONE
, /* src_mask */
977 MINUS_ONE
, /* dst_mask */
978 FALSE
), /* pcrel_offset */
980 /* The high 16 bits of the displacement from TP to the target. */
981 HOWTO (R_ALPHA_TPRELHI
, /* type */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
985 FALSE
, /* pc_relative */
987 complain_overflow_signed
, /* complain_on_overflow */
988 bfd_elf_generic_reloc
, /* special_function */
989 "TPRELHI", /* name */
990 FALSE
, /* partial_inplace */
991 0xffff, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE
), /* pcrel_offset */
995 /* The low 16 bits of the displacement from TP to the target. */
996 HOWTO (R_ALPHA_TPRELLO
, /* type */
998 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 FALSE
, /* pc_relative */
1002 complain_overflow_dont
, /* complain_on_overflow */
1003 bfd_elf_generic_reloc
, /* special_function */
1004 "TPRELLO", /* name */
1005 FALSE
, /* partial_inplace */
1006 0xffff, /* src_mask */
1007 0xffff, /* dst_mask */
1008 FALSE
), /* pcrel_offset */
1010 /* A 16-bit displacement from TP to the target. */
1011 HOWTO (R_ALPHA_TPREL16
, /* type */
1013 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 FALSE
, /* pc_relative */
1017 complain_overflow_signed
, /* complain_on_overflow */
1018 bfd_elf_generic_reloc
, /* special_function */
1019 "TPREL16", /* name */
1020 FALSE
, /* partial_inplace */
1021 0xffff, /* src_mask */
1022 0xffff, /* dst_mask */
1023 FALSE
), /* pcrel_offset */
1026 /* A mapping from BFD reloc types to Alpha ELF reloc types. */
1028 struct elf_reloc_map
1030 bfd_reloc_code_real_type bfd_reloc_val
;
1034 static const struct elf_reloc_map elf64_alpha_reloc_map
[] =
1036 {BFD_RELOC_NONE
, R_ALPHA_NONE
},
1037 {BFD_RELOC_32
, R_ALPHA_REFLONG
},
1038 {BFD_RELOC_64
, R_ALPHA_REFQUAD
},
1039 {BFD_RELOC_CTOR
, R_ALPHA_REFQUAD
},
1040 {BFD_RELOC_GPREL32
, R_ALPHA_GPREL32
},
1041 {BFD_RELOC_ALPHA_ELF_LITERAL
, R_ALPHA_LITERAL
},
1042 {BFD_RELOC_ALPHA_LITUSE
, R_ALPHA_LITUSE
},
1043 {BFD_RELOC_ALPHA_GPDISP
, R_ALPHA_GPDISP
},
1044 {BFD_RELOC_23_PCREL_S2
, R_ALPHA_BRADDR
},
1045 {BFD_RELOC_ALPHA_HINT
, R_ALPHA_HINT
},
1046 {BFD_RELOC_16_PCREL
, R_ALPHA_SREL16
},
1047 {BFD_RELOC_32_PCREL
, R_ALPHA_SREL32
},
1048 {BFD_RELOC_64_PCREL
, R_ALPHA_SREL64
},
1049 {BFD_RELOC_ALPHA_GPREL_HI16
, R_ALPHA_GPRELHIGH
},
1050 {BFD_RELOC_ALPHA_GPREL_LO16
, R_ALPHA_GPRELLOW
},
1051 {BFD_RELOC_GPREL16
, R_ALPHA_GPREL16
},
1052 {BFD_RELOC_ALPHA_BRSGP
, R_ALPHA_BRSGP
},
1053 {BFD_RELOC_ALPHA_TLSGD
, R_ALPHA_TLSGD
},
1054 {BFD_RELOC_ALPHA_TLSLDM
, R_ALPHA_TLSLDM
},
1055 {BFD_RELOC_ALPHA_DTPMOD64
, R_ALPHA_DTPMOD64
},
1056 {BFD_RELOC_ALPHA_GOTDTPREL16
, R_ALPHA_GOTDTPREL
},
1057 {BFD_RELOC_ALPHA_DTPREL64
, R_ALPHA_DTPREL64
},
1058 {BFD_RELOC_ALPHA_DTPREL_HI16
, R_ALPHA_DTPRELHI
},
1059 {BFD_RELOC_ALPHA_DTPREL_LO16
, R_ALPHA_DTPRELLO
},
1060 {BFD_RELOC_ALPHA_DTPREL16
, R_ALPHA_DTPREL16
},
1061 {BFD_RELOC_ALPHA_GOTTPREL16
, R_ALPHA_GOTTPREL
},
1062 {BFD_RELOC_ALPHA_TPREL64
, R_ALPHA_TPREL64
},
1063 {BFD_RELOC_ALPHA_TPREL_HI16
, R_ALPHA_TPRELHI
},
1064 {BFD_RELOC_ALPHA_TPREL_LO16
, R_ALPHA_TPRELLO
},
1065 {BFD_RELOC_ALPHA_TPREL16
, R_ALPHA_TPREL16
},
1068 /* Given a BFD reloc type, return a HOWTO structure. */
1070 static reloc_howto_type
*
1071 elf64_alpha_bfd_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1072 bfd_reloc_code_real_type code
)
1074 const struct elf_reloc_map
*i
, *e
;
1075 i
= e
= elf64_alpha_reloc_map
;
1076 e
+= sizeof (elf64_alpha_reloc_map
) / sizeof (struct elf_reloc_map
);
1079 if (i
->bfd_reloc_val
== code
)
1080 return &elf64_alpha_howto_table
[i
->elf_reloc_val
];
1085 static reloc_howto_type
*
1086 elf64_alpha_bfd_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1092 i
< (sizeof (elf64_alpha_howto_table
)
1093 / sizeof (elf64_alpha_howto_table
[0]));
1095 if (elf64_alpha_howto_table
[i
].name
!= NULL
1096 && strcasecmp (elf64_alpha_howto_table
[i
].name
, r_name
) == 0)
1097 return &elf64_alpha_howto_table
[i
];
1102 /* Given an Alpha ELF reloc type, fill in an arelent structure. */
1105 elf64_alpha_info_to_howto (bfd
*abfd
, arelent
*cache_ptr
,
1106 Elf_Internal_Rela
*dst
)
1108 unsigned r_type
= ELF64_R_TYPE(dst
->r_info
);
1110 if (r_type
>= R_ALPHA_max
)
1112 /* xgettext:c-format */
1113 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1115 bfd_set_error (bfd_error_bad_value
);
1118 cache_ptr
->howto
= &elf64_alpha_howto_table
[r_type
];
1122 /* These two relocations create a two-word entry in the got. */
1123 #define alpha_got_entry_size(r_type) \
1124 (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
1126 /* This is PT_TLS segment p_vaddr. */
1127 #define alpha_get_dtprel_base(info) \
1128 (elf_hash_table (info)->tls_sec->vma)
1130 /* Main program TLS (whose template starts at PT_TLS p_vaddr)
1131 is assigned offset round(16, PT_TLS p_align). */
1132 #define alpha_get_tprel_base(info) \
1133 (elf_hash_table (info)->tls_sec->vma \
1134 - align_power ((bfd_vma) 16, \
1135 elf_hash_table (info)->tls_sec->alignment_power))
1137 /* Handle an Alpha specific section when reading an object file. This
1138 is called when bfd_section_from_shdr finds a section with an unknown
1142 elf64_alpha_section_from_shdr (bfd
*abfd
,
1143 Elf_Internal_Shdr
*hdr
,
1149 /* There ought to be a place to keep ELF backend specific flags, but
1150 at the moment there isn't one. We just keep track of the
1151 sections by their name, instead. Fortunately, the ABI gives
1152 suggested names for all the MIPS specific sections, so we will
1153 probably get away with this. */
1154 switch (hdr
->sh_type
)
1156 case SHT_ALPHA_DEBUG
:
1157 if (strcmp (name
, ".mdebug") != 0)
1164 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1166 newsect
= hdr
->bfd_section
;
1168 if (hdr
->sh_type
== SHT_ALPHA_DEBUG
)
1170 if (!bfd_set_section_flags (newsect
,
1171 bfd_section_flags (newsect
) | SEC_DEBUGGING
))
1178 /* Convert Alpha specific section flags to bfd internal section flags. */
1181 elf64_alpha_section_flags (const Elf_Internal_Shdr
*hdr
)
1183 if (hdr
->sh_flags
& SHF_ALPHA_GPREL
)
1184 hdr
->bfd_section
->flags
|= SEC_SMALL_DATA
;
1189 /* Set the correct type for an Alpha ELF section. We do this by the
1190 section name, which is a hack, but ought to work. */
1193 elf64_alpha_fake_sections (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*sec
)
1195 register const char *name
;
1197 name
= bfd_section_name (sec
);
1199 if (strcmp (name
, ".mdebug") == 0)
1201 hdr
->sh_type
= SHT_ALPHA_DEBUG
;
1202 /* In a shared object on Irix 5.3, the .mdebug section has an
1203 entsize of 0. FIXME: Does this matter? */
1204 if ((abfd
->flags
& DYNAMIC
) != 0 )
1205 hdr
->sh_entsize
= 0;
1207 hdr
->sh_entsize
= 1;
1209 else if ((sec
->flags
& SEC_SMALL_DATA
)
1210 || strcmp (name
, ".sdata") == 0
1211 || strcmp (name
, ".sbss") == 0
1212 || strcmp (name
, ".lit4") == 0
1213 || strcmp (name
, ".lit8") == 0)
1214 hdr
->sh_flags
|= SHF_ALPHA_GPREL
;
1219 /* Hook called by the linker routine which adds symbols from an object
1220 file. We use it to put .comm items in .sbss, and not .bss. */
1223 elf64_alpha_add_symbol_hook (bfd
*abfd
, struct bfd_link_info
*info
,
1224 Elf_Internal_Sym
*sym
,
1225 const char **namep ATTRIBUTE_UNUSED
,
1226 flagword
*flagsp ATTRIBUTE_UNUSED
,
1227 asection
**secp
, bfd_vma
*valp
)
1229 if (sym
->st_shndx
== SHN_COMMON
1230 && !bfd_link_relocatable (info
)
1231 && sym
->st_size
<= elf_gp_size (abfd
))
1233 /* Common symbols less than or equal to -G nn bytes are
1234 automatically put into .sbss. */
1236 asection
*scomm
= bfd_get_section_by_name (abfd
, ".scommon");
1240 scomm
= bfd_make_section_with_flags (abfd
, ".scommon",
1243 | SEC_LINKER_CREATED
));
1249 *valp
= sym
->st_size
;
1255 /* Create the .got section. */
1258 elf64_alpha_create_got_section (bfd
*abfd
,
1259 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
1264 if (! is_alpha_elf (abfd
))
1267 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1268 | SEC_LINKER_CREATED
);
1269 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
1271 || !bfd_set_section_alignment (s
, 3))
1274 alpha_elf_tdata (abfd
)->got
= s
;
1276 /* Make sure the object's gotobj is set to itself so that we default
1277 to every object with its own .got. We'll merge .gots later once
1278 we've collected each object's info. */
1279 alpha_elf_tdata (abfd
)->gotobj
= abfd
;
1284 /* Create all the dynamic sections. */
1287 elf64_alpha_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
1291 struct elf_link_hash_entry
*h
;
1293 if (! is_alpha_elf (abfd
))
1296 /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
1298 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1299 | SEC_LINKER_CREATED
1300 | (elf64_alpha_use_secureplt
? SEC_READONLY
: 0));
1301 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", flags
);
1302 elf_hash_table (info
)->splt
= s
;
1303 if (s
== NULL
|| ! bfd_set_section_alignment (s
, 4))
1306 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
1308 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
1309 "_PROCEDURE_LINKAGE_TABLE_");
1310 elf_hash_table (info
)->hplt
= h
;
1314 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1315 | SEC_LINKER_CREATED
| SEC_READONLY
);
1316 s
= bfd_make_section_anyway_with_flags (abfd
, ".rela.plt", flags
);
1317 elf_hash_table (info
)->srelplt
= s
;
1318 if (s
== NULL
|| ! bfd_set_section_alignment (s
, 3))
1321 if (elf64_alpha_use_secureplt
)
1323 flags
= SEC_ALLOC
| SEC_LINKER_CREATED
;
1324 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
1325 elf_hash_table (info
)->sgotplt
= s
;
1326 if (s
== NULL
|| ! bfd_set_section_alignment (s
, 3))
1330 /* We may or may not have created a .got section for this object, but
1331 we definitely havn't done the rest of the work. */
1333 if (alpha_elf_tdata(abfd
)->gotobj
== NULL
)
1335 if (!elf64_alpha_create_got_section (abfd
, info
))
1339 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1340 | SEC_LINKER_CREATED
| SEC_READONLY
);
1341 s
= bfd_make_section_anyway_with_flags (abfd
, ".rela.got", flags
);
1342 elf_hash_table (info
)->srelgot
= s
;
1344 || !bfd_set_section_alignment (s
, 3))
1347 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
1348 dynobj's .got section. We don't do this in the linker script
1349 because we don't want to define the symbol if we are not creating
1350 a global offset table. */
1351 h
= _bfd_elf_define_linkage_sym (abfd
, info
, alpha_elf_tdata(abfd
)->got
,
1352 "_GLOBAL_OFFSET_TABLE_");
1353 elf_hash_table (info
)->hgot
= h
;
1360 /* Read ECOFF debugging information from a .mdebug section into a
1361 ecoff_debug_info structure. */
1364 elf64_alpha_read_ecoff_info (bfd
*abfd
, asection
*section
,
1365 struct ecoff_debug_info
*debug
)
1368 const struct ecoff_debug_swap
*swap
;
1369 char *ext_hdr
= NULL
;
1371 swap
= get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
1372 memset (debug
, 0, sizeof (*debug
));
1374 ext_hdr
= (char *) bfd_malloc (swap
->external_hdr_size
);
1375 if (ext_hdr
== NULL
&& swap
->external_hdr_size
!= 0)
1378 if (! bfd_get_section_contents (abfd
, section
, ext_hdr
, (file_ptr
) 0,
1379 swap
->external_hdr_size
))
1382 symhdr
= &debug
->symbolic_header
;
1383 (*swap
->swap_hdr_in
) (abfd
, ext_hdr
, symhdr
);
1385 /* The symbolic header contains absolute file offsets and sizes to
1387 #define READ(ptr, offset, count, size, type) \
1391 debug->ptr = NULL; \
1392 if (symhdr->count == 0) \
1394 if (_bfd_mul_overflow (size, symhdr->count, &amt)) \
1396 bfd_set_error (bfd_error_file_too_big); \
1397 goto error_return; \
1399 if (bfd_seek (abfd, symhdr->offset, SEEK_SET) != 0) \
1400 goto error_return; \
1401 debug->ptr = (type) _bfd_malloc_and_read (abfd, amt, amt); \
1402 if (debug->ptr == NULL) \
1403 goto error_return; \
1406 READ (line
, cbLineOffset
, cbLine
, sizeof (unsigned char), unsigned char *);
1407 READ (external_dnr
, cbDnOffset
, idnMax
, swap
->external_dnr_size
, void *);
1408 READ (external_pdr
, cbPdOffset
, ipdMax
, swap
->external_pdr_size
, void *);
1409 READ (external_sym
, cbSymOffset
, isymMax
, swap
->external_sym_size
, void *);
1410 READ (external_opt
, cbOptOffset
, ioptMax
, swap
->external_opt_size
, void *);
1411 READ (external_aux
, cbAuxOffset
, iauxMax
, sizeof (union aux_ext
),
1413 READ (ss
, cbSsOffset
, issMax
, sizeof (char), char *);
1414 READ (ssext
, cbSsExtOffset
, issExtMax
, sizeof (char), char *);
1415 READ (external_fdr
, cbFdOffset
, ifdMax
, swap
->external_fdr_size
, void *);
1416 READ (external_rfd
, cbRfdOffset
, crfd
, swap
->external_rfd_size
, void *);
1417 READ (external_ext
, cbExtOffset
, iextMax
, swap
->external_ext_size
, void *);
1427 free (debug
->external_dnr
);
1428 free (debug
->external_pdr
);
1429 free (debug
->external_sym
);
1430 free (debug
->external_opt
);
1431 free (debug
->external_aux
);
1433 free (debug
->ssext
);
1434 free (debug
->external_fdr
);
1435 free (debug
->external_rfd
);
1436 free (debug
->external_ext
);
1440 /* Alpha ELF local labels start with '$'. */
1443 elf64_alpha_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
1445 return name
[0] == '$';
1449 elf64_alpha_find_nearest_line (bfd
*abfd
, asymbol
**symbols
,
1450 asection
*section
, bfd_vma offset
,
1451 const char **filename_ptr
,
1452 const char **functionname_ptr
,
1453 unsigned int *line_ptr
,
1454 unsigned int *discriminator_ptr
)
1458 if (_bfd_dwarf2_find_nearest_line (abfd
, symbols
, NULL
, section
, offset
,
1459 filename_ptr
, functionname_ptr
,
1460 line_ptr
, discriminator_ptr
,
1461 dwarf_debug_sections
,
1462 &elf_tdata (abfd
)->dwarf2_find_line_info
)
1466 msec
= bfd_get_section_by_name (abfd
, ".mdebug");
1470 struct alpha_elf_find_line
*fi
;
1471 const struct ecoff_debug_swap
* const swap
=
1472 get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
1474 /* If we are called during a link, alpha_elf_final_link may have
1475 cleared the SEC_HAS_CONTENTS field. We force it back on here
1476 if appropriate (which it normally will be). */
1477 origflags
= msec
->flags
;
1478 if (elf_section_data (msec
)->this_hdr
.sh_type
!= SHT_NOBITS
)
1479 msec
->flags
|= SEC_HAS_CONTENTS
;
1481 fi
= alpha_elf_tdata (abfd
)->find_line_info
;
1484 bfd_size_type external_fdr_size
;
1487 struct fdr
*fdr_ptr
;
1488 bfd_size_type amt
= sizeof (struct alpha_elf_find_line
);
1490 fi
= (struct alpha_elf_find_line
*) bfd_zalloc (abfd
, amt
);
1493 msec
->flags
= origflags
;
1497 if (!elf64_alpha_read_ecoff_info (abfd
, msec
, &fi
->d
))
1499 msec
->flags
= origflags
;
1503 /* Swap in the FDR information. */
1504 amt
= fi
->d
.symbolic_header
.ifdMax
* sizeof (struct fdr
);
1505 fi
->d
.fdr
= (struct fdr
*) bfd_alloc (abfd
, amt
);
1506 if (fi
->d
.fdr
== NULL
)
1508 msec
->flags
= origflags
;
1511 external_fdr_size
= swap
->external_fdr_size
;
1512 fdr_ptr
= fi
->d
.fdr
;
1513 fraw_src
= (char *) fi
->d
.external_fdr
;
1514 fraw_end
= (fraw_src
1515 + fi
->d
.symbolic_header
.ifdMax
* external_fdr_size
);
1516 for (; fraw_src
< fraw_end
; fraw_src
+= external_fdr_size
, fdr_ptr
++)
1517 (*swap
->swap_fdr_in
) (abfd
, fraw_src
, fdr_ptr
);
1519 alpha_elf_tdata (abfd
)->find_line_info
= fi
;
1521 /* Note that we don't bother to ever free this information.
1522 find_nearest_line is either called all the time, as in
1523 objdump -l, so the information should be saved, or it is
1524 rarely called, as in ld error messages, so the memory
1525 wasted is unimportant. Still, it would probably be a
1526 good idea for free_cached_info to throw it away. */
1529 if (_bfd_ecoff_locate_line (abfd
, section
, offset
, &fi
->d
, swap
,
1530 &fi
->i
, filename_ptr
, functionname_ptr
,
1533 msec
->flags
= origflags
;
1537 msec
->flags
= origflags
;
1540 /* Fall back on the generic ELF find_nearest_line routine. */
1542 return _bfd_elf_find_nearest_line (abfd
, symbols
, section
, offset
,
1543 filename_ptr
, functionname_ptr
,
1544 line_ptr
, discriminator_ptr
);
1547 /* Structure used to pass information to alpha_elf_output_extsym. */
1552 struct bfd_link_info
*info
;
1553 struct ecoff_debug_info
*debug
;
1554 const struct ecoff_debug_swap
*swap
;
1559 elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry
*h
, void * data
)
1561 struct extsym_info
*einfo
= (struct extsym_info
*) data
;
1563 asection
*sec
, *output_section
;
1565 if (h
->root
.indx
== -2)
1567 else if ((h
->root
.def_dynamic
1568 || h
->root
.ref_dynamic
1569 || h
->root
.root
.type
== bfd_link_hash_new
)
1570 && !h
->root
.def_regular
1571 && !h
->root
.ref_regular
)
1573 else if (einfo
->info
->strip
== strip_all
1574 || (einfo
->info
->strip
== strip_some
1575 && bfd_hash_lookup (einfo
->info
->keep_hash
,
1576 h
->root
.root
.root
.string
,
1577 FALSE
, FALSE
) == NULL
))
1585 if (h
->esym
.ifd
== -2)
1588 h
->esym
.cobol_main
= 0;
1589 h
->esym
.weakext
= 0;
1590 h
->esym
.reserved
= 0;
1591 h
->esym
.ifd
= ifdNil
;
1592 h
->esym
.asym
.value
= 0;
1593 h
->esym
.asym
.st
= stGlobal
;
1595 if (h
->root
.root
.type
!= bfd_link_hash_defined
1596 && h
->root
.root
.type
!= bfd_link_hash_defweak
)
1597 h
->esym
.asym
.sc
= scAbs
;
1602 sec
= h
->root
.root
.u
.def
.section
;
1603 output_section
= sec
->output_section
;
1605 /* When making a shared library and symbol h is the one from
1606 the another shared library, OUTPUT_SECTION may be null. */
1607 if (output_section
== NULL
)
1608 h
->esym
.asym
.sc
= scUndefined
;
1611 name
= bfd_section_name (output_section
);
1613 if (strcmp (name
, ".text") == 0)
1614 h
->esym
.asym
.sc
= scText
;
1615 else if (strcmp (name
, ".data") == 0)
1616 h
->esym
.asym
.sc
= scData
;
1617 else if (strcmp (name
, ".sdata") == 0)
1618 h
->esym
.asym
.sc
= scSData
;
1619 else if (strcmp (name
, ".rodata") == 0
1620 || strcmp (name
, ".rdata") == 0)
1621 h
->esym
.asym
.sc
= scRData
;
1622 else if (strcmp (name
, ".bss") == 0)
1623 h
->esym
.asym
.sc
= scBss
;
1624 else if (strcmp (name
, ".sbss") == 0)
1625 h
->esym
.asym
.sc
= scSBss
;
1626 else if (strcmp (name
, ".init") == 0)
1627 h
->esym
.asym
.sc
= scInit
;
1628 else if (strcmp (name
, ".fini") == 0)
1629 h
->esym
.asym
.sc
= scFini
;
1631 h
->esym
.asym
.sc
= scAbs
;
1635 h
->esym
.asym
.reserved
= 0;
1636 h
->esym
.asym
.index
= indexNil
;
1639 if (h
->root
.root
.type
== bfd_link_hash_common
)
1640 h
->esym
.asym
.value
= h
->root
.root
.u
.c
.size
;
1641 else if (h
->root
.root
.type
== bfd_link_hash_defined
1642 || h
->root
.root
.type
== bfd_link_hash_defweak
)
1644 if (h
->esym
.asym
.sc
== scCommon
)
1645 h
->esym
.asym
.sc
= scBss
;
1646 else if (h
->esym
.asym
.sc
== scSCommon
)
1647 h
->esym
.asym
.sc
= scSBss
;
1649 sec
= h
->root
.root
.u
.def
.section
;
1650 output_section
= sec
->output_section
;
1651 if (output_section
!= NULL
)
1652 h
->esym
.asym
.value
= (h
->root
.root
.u
.def
.value
1653 + sec
->output_offset
1654 + output_section
->vma
);
1656 h
->esym
.asym
.value
= 0;
1659 if (! bfd_ecoff_debug_one_external (einfo
->abfd
, einfo
->debug
, einfo
->swap
,
1660 h
->root
.root
.root
.string
,
1663 einfo
->failed
= TRUE
;
1670 /* Search for and possibly create a got entry. */
1672 static struct alpha_elf_got_entry
*
1673 get_got_entry (bfd
*abfd
, struct alpha_elf_link_hash_entry
*h
,
1674 unsigned long r_type
, unsigned long r_symndx
,
1677 struct alpha_elf_got_entry
*gotent
;
1678 struct alpha_elf_got_entry
**slot
;
1681 slot
= &h
->got_entries
;
1684 /* This is a local .got entry -- record for merge. */
1686 struct alpha_elf_got_entry
**local_got_entries
;
1688 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
1689 if (!local_got_entries
)
1692 Elf_Internal_Shdr
*symtab_hdr
;
1694 symtab_hdr
= &elf_tdata(abfd
)->symtab_hdr
;
1695 size
= symtab_hdr
->sh_info
;
1696 size
*= sizeof (struct alpha_elf_got_entry
*);
1699 = (struct alpha_elf_got_entry
**) bfd_zalloc (abfd
, size
);
1700 if (!local_got_entries
)
1703 alpha_elf_tdata (abfd
)->local_got_entries
= local_got_entries
;
1706 slot
= &local_got_entries
[r_symndx
];
1709 for (gotent
= *slot
; gotent
; gotent
= gotent
->next
)
1710 if (gotent
->gotobj
== abfd
1711 && gotent
->reloc_type
== r_type
1712 && gotent
->addend
== r_addend
)
1720 amt
= sizeof (struct alpha_elf_got_entry
);
1721 gotent
= (struct alpha_elf_got_entry
*) bfd_alloc (abfd
, amt
);
1725 gotent
->gotobj
= abfd
;
1726 gotent
->addend
= r_addend
;
1727 gotent
->got_offset
= -1;
1728 gotent
->plt_offset
= -1;
1729 gotent
->use_count
= 1;
1730 gotent
->reloc_type
= r_type
;
1731 gotent
->reloc_done
= 0;
1732 gotent
->reloc_xlated
= 0;
1734 gotent
->next
= *slot
;
1737 entry_size
= alpha_got_entry_size (r_type
);
1738 alpha_elf_tdata (abfd
)->total_got_size
+= entry_size
;
1740 alpha_elf_tdata(abfd
)->local_got_size
+= entry_size
;
1743 gotent
->use_count
+= 1;
1749 elf64_alpha_want_plt (struct alpha_elf_link_hash_entry
*ah
)
1751 return ((ah
->root
.type
== STT_FUNC
1752 || ah
->root
.root
.type
== bfd_link_hash_undefweak
1753 || ah
->root
.root
.type
== bfd_link_hash_undefined
)
1754 && (ah
->flags
& ALPHA_ELF_LINK_HASH_LU_PLT
) != 0
1755 && (ah
->flags
& ~ALPHA_ELF_LINK_HASH_LU_PLT
) == 0);
1758 /* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset.
1759 Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE
1760 as is. On the other hand, elf-eh-frame.c processing requires .eh_frame
1761 relocs to be sorted. */
1764 elf64_alpha_sort_relocs_p (asection
*sec
)
1766 return (sec
->flags
& SEC_CODE
) == 0;
1770 /* Handle dynamic relocations when doing an Alpha ELF link. */
1773 elf64_alpha_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1774 asection
*sec
, const Elf_Internal_Rela
*relocs
)
1778 Elf_Internal_Shdr
*symtab_hdr
;
1779 struct alpha_elf_link_hash_entry
**sym_hashes
;
1780 const Elf_Internal_Rela
*rel
, *relend
;
1782 if (bfd_link_relocatable (info
))
1785 BFD_ASSERT (is_alpha_elf (abfd
));
1787 dynobj
= elf_hash_table (info
)->dynobj
;
1789 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1792 symtab_hdr
= &elf_symtab_hdr (abfd
);
1793 sym_hashes
= alpha_elf_sym_hashes (abfd
);
1795 relend
= relocs
+ sec
->reloc_count
;
1796 for (rel
= relocs
; rel
< relend
; ++rel
)
1804 unsigned long r_symndx
, r_type
;
1805 struct alpha_elf_link_hash_entry
*h
;
1806 unsigned int gotent_flags
;
1807 bfd_boolean maybe_dynamic
;
1811 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1812 if (r_symndx
< symtab_hdr
->sh_info
)
1816 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1818 while (h
->root
.root
.type
== bfd_link_hash_indirect
1819 || h
->root
.root
.type
== bfd_link_hash_warning
)
1820 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
1822 /* PR15323, ref flags aren't set for references in the same
1824 h
->root
.ref_regular
= 1;
1827 /* We can only get preliminary data on whether a symbol is
1828 locally or externally defined, as not all of the input files
1829 have yet been processed. Do something with what we know, as
1830 this may help reduce memory usage and processing time later. */
1831 maybe_dynamic
= FALSE
;
1832 if (h
&& ((bfd_link_pic (info
)
1834 || info
->unresolved_syms_in_shared_libs
== RM_IGNORE
))
1835 || !h
->root
.def_regular
1836 || h
->root
.root
.type
== bfd_link_hash_defweak
))
1837 maybe_dynamic
= TRUE
;
1841 r_type
= ELF64_R_TYPE (rel
->r_info
);
1842 addend
= rel
->r_addend
;
1846 case R_ALPHA_LITERAL
:
1847 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1849 /* Remember how this literal is used from its LITUSEs.
1850 This will be important when it comes to decide if we can
1851 create a .plt entry for a function symbol. */
1852 while (++rel
< relend
&& ELF64_R_TYPE (rel
->r_info
) == R_ALPHA_LITUSE
)
1853 if (rel
->r_addend
>= 1 && rel
->r_addend
<= 6)
1854 gotent_flags
|= 1 << rel
->r_addend
;
1857 /* No LITUSEs -- presumably the address is used somehow. */
1858 if (gotent_flags
== 0)
1859 gotent_flags
= ALPHA_ELF_LINK_HASH_LU_ADDR
;
1862 case R_ALPHA_GPDISP
:
1863 case R_ALPHA_GPREL16
:
1864 case R_ALPHA_GPREL32
:
1865 case R_ALPHA_GPRELHIGH
:
1866 case R_ALPHA_GPRELLOW
:
1871 case R_ALPHA_REFLONG
:
1872 case R_ALPHA_REFQUAD
:
1873 if (bfd_link_pic (info
) || maybe_dynamic
)
1877 case R_ALPHA_TLSLDM
:
1878 /* The symbol for a TLSLDM reloc is ignored. Collapse the
1879 reloc to the STN_UNDEF (0) symbol so that they all match. */
1880 r_symndx
= STN_UNDEF
;
1882 maybe_dynamic
= FALSE
;
1886 case R_ALPHA_GOTDTPREL
:
1887 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1890 case R_ALPHA_GOTTPREL
:
1891 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1892 gotent_flags
= ALPHA_ELF_LINK_HASH_TLS_IE
;
1893 if (bfd_link_pic (info
))
1894 info
->flags
|= DF_STATIC_TLS
;
1897 case R_ALPHA_TPREL64
:
1898 if (bfd_link_dll (info
))
1900 info
->flags
|= DF_STATIC_TLS
;
1903 else if (maybe_dynamic
)
1908 if (need
& NEED_GOT
)
1910 if (alpha_elf_tdata(abfd
)->gotobj
== NULL
)
1912 if (!elf64_alpha_create_got_section (abfd
, info
))
1917 if (need
& NEED_GOT_ENTRY
)
1919 struct alpha_elf_got_entry
*gotent
;
1921 gotent
= get_got_entry (abfd
, h
, r_type
, r_symndx
, addend
);
1927 gotent
->flags
|= gotent_flags
;
1930 gotent_flags
|= h
->flags
;
1931 h
->flags
= gotent_flags
;
1933 /* Make a guess as to whether a .plt entry is needed. */
1934 /* ??? It appears that we won't make it into
1935 adjust_dynamic_symbol for symbols that remain
1936 totally undefined. Copying this check here means
1937 we can create a plt entry for them too. */
1939 = (maybe_dynamic
&& elf64_alpha_want_plt (h
));
1944 if (need
& NEED_DYNREL
)
1946 /* We need to create the section here now whether we eventually
1947 use it or not so that it gets mapped to an output section by
1948 the linker. If not used, we'll kill it in size_dynamic_sections. */
1951 sreloc
= _bfd_elf_make_dynamic_reloc_section
1952 (sec
, dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1960 /* Since we havn't seen all of the input symbols yet, we
1961 don't know whether we'll actually need a dynamic relocation
1962 entry for this reloc. So make a record of it. Once we
1963 find out if this thing needs dynamic relocation we'll
1964 expand the relocation sections by the appropriate amount. */
1966 struct alpha_elf_reloc_entry
*rent
;
1968 for (rent
= h
->reloc_entries
; rent
; rent
= rent
->next
)
1969 if (rent
->rtype
== r_type
&& rent
->srel
== sreloc
)
1974 size_t amt
= sizeof (struct alpha_elf_reloc_entry
);
1975 rent
= (struct alpha_elf_reloc_entry
*) bfd_alloc (abfd
, amt
);
1979 rent
->srel
= sreloc
;
1981 rent
->rtype
= r_type
;
1984 rent
->next
= h
->reloc_entries
;
1985 h
->reloc_entries
= rent
;
1990 else if (bfd_link_pic (info
))
1992 /* If this is a shared library, and the section is to be
1993 loaded into memory, we need a RELATIVE reloc. */
1994 sreloc
->size
+= sizeof (Elf64_External_Rela
);
1995 if (sec
->flags
& SEC_READONLY
)
1997 info
->flags
|= DF_TEXTREL
;
1998 info
->callbacks
->minfo
1999 (_("%pB: dynamic relocation against `%pT' in "
2000 "read-only section `%pA'\n"),
2001 sec
->owner
, h
->root
.root
.root
.string
, sec
);
2010 /* Return the section that should be marked against GC for a given
2014 elf64_alpha_gc_mark_hook (asection
*sec
, struct bfd_link_info
*info
,
2015 Elf_Internal_Rela
*rel
,
2016 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
)
2018 /* These relocations don't really reference a symbol. Instead we store
2019 extra data in their addend slot. Ignore the symbol. */
2020 switch (ELF64_R_TYPE (rel
->r_info
))
2022 case R_ALPHA_LITUSE
:
2023 case R_ALPHA_GPDISP
:
2028 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2031 /* Adjust a symbol defined by a dynamic object and referenced by a
2032 regular object. The current definition is in some section of the
2033 dynamic object, but we're not including those sections. We have to
2034 change the definition to something the rest of the link can
2038 elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2039 struct elf_link_hash_entry
*h
)
2043 struct alpha_elf_link_hash_entry
*ah
;
2045 dynobj
= elf_hash_table(info
)->dynobj
;
2046 ah
= (struct alpha_elf_link_hash_entry
*)h
;
2048 /* Now that we've seen all of the input symbols, finalize our decision
2049 about whether this symbol should get a .plt entry. Irritatingly, it
2050 is common for folk to leave undefined symbols in shared libraries,
2051 and they still expect lazy binding; accept undefined symbols in lieu
2053 if (alpha_elf_dynamic_symbol_p (h
, info
) && elf64_alpha_want_plt (ah
))
2055 h
->needs_plt
= TRUE
;
2057 s
= elf_hash_table(info
)->splt
;
2058 if (!s
&& !elf64_alpha_create_dynamic_sections (dynobj
, info
))
2061 /* We need one plt entry per got subsection. Delay allocation of
2062 the actual plt entries until size_plt_section, called from
2063 size_dynamic_sections or during relaxation. */
2068 h
->needs_plt
= FALSE
;
2070 /* If this is a weak symbol, and there is a real definition, the
2071 processor independent code will have arranged for us to see the
2072 real definition first, and we can just use the same value. */
2073 if (h
->is_weakalias
)
2075 struct elf_link_hash_entry
*def
= weakdef (h
);
2076 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
2077 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
2078 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
2082 /* This is a reference to a symbol defined by a dynamic object which
2083 is not a function. The Alpha, since it uses .got entries for all
2084 symbols even in regular objects, does not need the hackery of a
2085 .dynbss section and COPY dynamic relocations. */
2090 /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
2093 elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry
*h
,
2094 const Elf_Internal_Sym
*isym
,
2095 bfd_boolean definition
,
2096 bfd_boolean dynamic
)
2098 if (!dynamic
&& definition
)
2099 h
->other
= ((h
->other
& ELF_ST_VISIBILITY (-1))
2100 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
2103 /* Symbol versioning can create new symbols, and make our old symbols
2104 indirect to the new ones. Consolidate the got and reloc information
2105 in these situations. */
2108 elf64_alpha_copy_indirect_symbol (struct bfd_link_info
*info
,
2109 struct elf_link_hash_entry
*dir
,
2110 struct elf_link_hash_entry
*ind
)
2112 struct alpha_elf_link_hash_entry
*hi
2113 = (struct alpha_elf_link_hash_entry
*) ind
;
2114 struct alpha_elf_link_hash_entry
*hs
2115 = (struct alpha_elf_link_hash_entry
*) dir
;
2117 /* Do the merging in the superclass. */
2118 _bfd_elf_link_hash_copy_indirect(info
, dir
, ind
);
2120 /* Merge the flags. Whee. */
2121 hs
->flags
|= hi
->flags
;
2123 /* ??? It's unclear to me what's really supposed to happen when
2124 "merging" defweak and defined symbols, given that we don't
2125 actually throw away the defweak. This more-or-less copies
2126 the logic related to got and plt entries in the superclass. */
2127 if (ind
->root
.type
!= bfd_link_hash_indirect
)
2130 /* Merge the .got entries. Cannibalize the old symbol's list in
2131 doing so, since we don't need it anymore. */
2133 if (hs
->got_entries
== NULL
)
2134 hs
->got_entries
= hi
->got_entries
;
2137 struct alpha_elf_got_entry
*gi
, *gs
, *gin
, *gsh
;
2139 gsh
= hs
->got_entries
;
2140 for (gi
= hi
->got_entries
; gi
; gi
= gin
)
2143 for (gs
= gsh
; gs
; gs
= gs
->next
)
2144 if (gi
->gotobj
== gs
->gotobj
2145 && gi
->reloc_type
== gs
->reloc_type
2146 && gi
->addend
== gs
->addend
)
2148 gs
->use_count
+= gi
->use_count
;
2151 gi
->next
= hs
->got_entries
;
2152 hs
->got_entries
= gi
;
2156 hi
->got_entries
= NULL
;
2158 /* And similar for the reloc entries. */
2160 if (hs
->reloc_entries
== NULL
)
2161 hs
->reloc_entries
= hi
->reloc_entries
;
2164 struct alpha_elf_reloc_entry
*ri
, *rs
, *rin
, *rsh
;
2166 rsh
= hs
->reloc_entries
;
2167 for (ri
= hi
->reloc_entries
; ri
; ri
= rin
)
2170 for (rs
= rsh
; rs
; rs
= rs
->next
)
2171 if (ri
->rtype
== rs
->rtype
&& ri
->srel
== rs
->srel
)
2173 rs
->count
+= ri
->count
;
2176 ri
->next
= hs
->reloc_entries
;
2177 hs
->reloc_entries
= ri
;
2181 hi
->reloc_entries
= NULL
;
2184 /* Is it possible to merge two object file's .got tables? */
2187 elf64_alpha_can_merge_gots (bfd
*a
, bfd
*b
)
2189 int total
= alpha_elf_tdata (a
)->total_got_size
;
2192 /* Trivial quick fallout test. */
2193 if (total
+ alpha_elf_tdata (b
)->total_got_size
<= MAX_GOT_SIZE
)
2196 /* By their nature, local .got entries cannot be merged. */
2197 if ((total
+= alpha_elf_tdata (b
)->local_got_size
) > MAX_GOT_SIZE
)
2200 /* Failing the common trivial comparison, we must effectively
2201 perform the merge. Not actually performing the merge means that
2202 we don't have to store undo information in case we fail. */
2203 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2205 struct alpha_elf_link_hash_entry
**hashes
= alpha_elf_sym_hashes (bsub
);
2206 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2209 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2210 for (i
= 0; i
< n
; ++i
)
2212 struct alpha_elf_got_entry
*ae
, *be
;
2213 struct alpha_elf_link_hash_entry
*h
;
2216 while (h
->root
.root
.type
== bfd_link_hash_indirect
2217 || h
->root
.root
.type
== bfd_link_hash_warning
)
2218 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2220 for (be
= h
->got_entries
; be
; be
= be
->next
)
2222 if (be
->use_count
== 0)
2224 if (be
->gotobj
!= b
)
2227 for (ae
= h
->got_entries
; ae
; ae
= ae
->next
)
2229 && ae
->reloc_type
== be
->reloc_type
2230 && ae
->addend
== be
->addend
)
2233 total
+= alpha_got_entry_size (be
->reloc_type
);
2234 if (total
> MAX_GOT_SIZE
)
2244 /* Actually merge two .got tables. */
2247 elf64_alpha_merge_gots (bfd
*a
, bfd
*b
)
2249 int total
= alpha_elf_tdata (a
)->total_got_size
;
2252 /* Remember local expansion. */
2254 int e
= alpha_elf_tdata (b
)->local_got_size
;
2256 alpha_elf_tdata (a
)->local_got_size
+= e
;
2259 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2261 struct alpha_elf_got_entry
**local_got_entries
;
2262 struct alpha_elf_link_hash_entry
**hashes
;
2263 Elf_Internal_Shdr
*symtab_hdr
;
2266 /* Let the local .got entries know they are part of a new subsegment. */
2267 local_got_entries
= alpha_elf_tdata (bsub
)->local_got_entries
;
2268 if (local_got_entries
)
2270 n
= elf_tdata (bsub
)->symtab_hdr
.sh_info
;
2271 for (i
= 0; i
< n
; ++i
)
2273 struct alpha_elf_got_entry
*ent
;
2274 for (ent
= local_got_entries
[i
]; ent
; ent
= ent
->next
)
2279 /* Merge the global .got entries. */
2280 hashes
= alpha_elf_sym_hashes (bsub
);
2281 symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2283 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2284 for (i
= 0; i
< n
; ++i
)
2286 struct alpha_elf_got_entry
*ae
, *be
, **pbe
, **start
;
2287 struct alpha_elf_link_hash_entry
*h
;
2290 while (h
->root
.root
.type
== bfd_link_hash_indirect
2291 || h
->root
.root
.type
== bfd_link_hash_warning
)
2292 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2294 pbe
= start
= &h
->got_entries
;
2295 while ((be
= *pbe
) != NULL
)
2297 if (be
->use_count
== 0)
2300 memset (be
, 0xa5, sizeof (*be
));
2303 if (be
->gotobj
!= b
)
2306 for (ae
= *start
; ae
; ae
= ae
->next
)
2308 && ae
->reloc_type
== be
->reloc_type
2309 && ae
->addend
== be
->addend
)
2311 ae
->flags
|= be
->flags
;
2312 ae
->use_count
+= be
->use_count
;
2314 memset (be
, 0xa5, sizeof (*be
));
2318 total
+= alpha_got_entry_size (be
->reloc_type
);
2326 alpha_elf_tdata (bsub
)->gotobj
= a
;
2328 alpha_elf_tdata (a
)->total_got_size
= total
;
2330 /* Merge the two in_got chains. */
2335 while ((next
= alpha_elf_tdata (bsub
)->in_got_link_next
) != NULL
)
2338 alpha_elf_tdata (bsub
)->in_got_link_next
= b
;
2342 /* Calculate the offsets for the got entries. */
2345 elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry
*h
,
2346 void * arg ATTRIBUTE_UNUSED
)
2348 struct alpha_elf_got_entry
*gotent
;
2350 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2351 if (gotent
->use_count
> 0)
2353 struct alpha_elf_obj_tdata
*td
;
2354 bfd_size_type
*plge
;
2356 td
= alpha_elf_tdata (gotent
->gotobj
);
2357 plge
= &td
->got
->size
;
2358 gotent
->got_offset
= *plge
;
2359 *plge
+= alpha_got_entry_size (gotent
->reloc_type
);
2366 elf64_alpha_calc_got_offsets (struct bfd_link_info
*info
)
2369 struct alpha_elf_link_hash_table
* htab
;
2371 htab
= alpha_elf_hash_table (info
);
2374 got_list
= htab
->got_list
;
2376 /* First, zero out the .got sizes, as we may be recalculating the
2377 .got after optimizing it. */
2378 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2379 alpha_elf_tdata(i
)->got
->size
= 0;
2381 /* Next, fill in the offsets for all the global entries. */
2382 alpha_elf_link_hash_traverse (htab
,
2383 elf64_alpha_calc_got_offsets_for_symbol
,
2386 /* Finally, fill in the offsets for the local entries. */
2387 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2389 bfd_size_type got_offset
= alpha_elf_tdata(i
)->got
->size
;
2392 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2394 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2397 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2398 if (!local_got_entries
)
2401 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2402 for (gotent
= local_got_entries
[k
]; gotent
; gotent
= gotent
->next
)
2403 if (gotent
->use_count
> 0)
2405 gotent
->got_offset
= got_offset
;
2406 got_offset
+= alpha_got_entry_size (gotent
->reloc_type
);
2410 alpha_elf_tdata(i
)->got
->size
= got_offset
;
2414 /* Constructs the gots. */
2417 elf64_alpha_size_got_sections (struct bfd_link_info
*info
,
2418 bfd_boolean may_merge
)
2420 bfd
*i
, *got_list
, *cur_got_obj
= NULL
;
2421 struct alpha_elf_link_hash_table
* htab
;
2423 htab
= alpha_elf_hash_table (info
);
2426 got_list
= htab
->got_list
;
2428 /* On the first time through, pretend we have an existing got list
2429 consisting of all of the input files. */
2430 if (got_list
== NULL
)
2432 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
2436 if (! is_alpha_elf (i
))
2439 this_got
= alpha_elf_tdata (i
)->gotobj
;
2440 if (this_got
== NULL
)
2443 /* We are assuming no merging has yet occurred. */
2444 BFD_ASSERT (this_got
== i
);
2446 if (alpha_elf_tdata (this_got
)->total_got_size
> MAX_GOT_SIZE
)
2448 /* Yikes! A single object file has too many entries. */
2450 /* xgettext:c-format */
2451 (_("%pB: .got subsegment exceeds 64K (size %d)"),
2452 i
, alpha_elf_tdata (this_got
)->total_got_size
);
2456 if (got_list
== NULL
)
2457 got_list
= this_got
;
2459 alpha_elf_tdata(cur_got_obj
)->got_link_next
= this_got
;
2460 cur_got_obj
= this_got
;
2463 /* Strange degenerate case of no got references. */
2464 if (got_list
== NULL
)
2467 htab
->got_list
= got_list
;
2470 cur_got_obj
= got_list
;
2471 if (cur_got_obj
== NULL
)
2476 i
= alpha_elf_tdata(cur_got_obj
)->got_link_next
;
2479 if (elf64_alpha_can_merge_gots (cur_got_obj
, i
))
2481 elf64_alpha_merge_gots (cur_got_obj
, i
);
2483 alpha_elf_tdata(i
)->got
->size
= 0;
2484 i
= alpha_elf_tdata(i
)->got_link_next
;
2485 alpha_elf_tdata(cur_got_obj
)->got_link_next
= i
;
2490 i
= alpha_elf_tdata(i
)->got_link_next
;
2495 /* Once the gots have been merged, fill in the got offsets for
2496 everything therein. */
2497 elf64_alpha_calc_got_offsets (info
);
2503 elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry
*h
,
2506 asection
*splt
= (asection
*) data
;
2507 struct alpha_elf_got_entry
*gotent
;
2508 bfd_boolean saw_one
= FALSE
;
2510 /* If we didn't need an entry before, we still don't. */
2511 if (!h
->root
.needs_plt
)
2514 /* For each LITERAL got entry still in use, allocate a plt entry. */
2515 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2516 if (gotent
->reloc_type
== R_ALPHA_LITERAL
2517 && gotent
->use_count
> 0)
2519 if (splt
->size
== 0)
2520 splt
->size
= PLT_HEADER_SIZE
;
2521 gotent
->plt_offset
= splt
->size
;
2522 splt
->size
+= PLT_ENTRY_SIZE
;
2526 /* If there weren't any, there's no longer a need for the PLT entry. */
2528 h
->root
.needs_plt
= FALSE
;
2533 /* Called from relax_section to rebuild the PLT in light of potential changes
2534 in the function's status. */
2537 elf64_alpha_size_plt_section (struct bfd_link_info
*info
)
2539 asection
*splt
, *spltrel
, *sgotplt
;
2540 unsigned long entries
;
2541 struct alpha_elf_link_hash_table
* htab
;
2543 htab
= alpha_elf_hash_table (info
);
2547 splt
= elf_hash_table(info
)->splt
;
2553 alpha_elf_link_hash_traverse (htab
,
2554 elf64_alpha_size_plt_section_1
, splt
);
2556 /* Every plt entry requires a JMP_SLOT relocation. */
2557 spltrel
= elf_hash_table(info
)->srelplt
;
2561 if (elf64_alpha_use_secureplt
)
2562 entries
= (splt
->size
- NEW_PLT_HEADER_SIZE
) / NEW_PLT_ENTRY_SIZE
;
2564 entries
= (splt
->size
- OLD_PLT_HEADER_SIZE
) / OLD_PLT_ENTRY_SIZE
;
2566 spltrel
->size
= entries
* sizeof (Elf64_External_Rela
);
2568 /* When using the secureplt, we need two words somewhere in the data
2569 segment for the dynamic linker to tell us where to go. This is the
2570 entire contents of the .got.plt section. */
2571 if (elf64_alpha_use_secureplt
)
2573 sgotplt
= elf_hash_table(info
)->sgotplt
;
2574 sgotplt
->size
= entries
? 16 : 0;
2579 elf64_alpha_always_size_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2580 struct bfd_link_info
*info
)
2583 struct alpha_elf_link_hash_table
* htab
;
2585 if (bfd_link_relocatable (info
))
2588 htab
= alpha_elf_hash_table (info
);
2592 if (!elf64_alpha_size_got_sections (info
, TRUE
))
2595 /* Allocate space for all of the .got subsections. */
2597 for ( ; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2599 asection
*s
= alpha_elf_tdata(i
)->got
;
2602 s
->contents
= (bfd_byte
*) bfd_zalloc (i
, s
->size
);
2603 if (s
->contents
== NULL
)
2611 /* The number of dynamic relocations required by a static relocation. */
2614 alpha_dynamic_entries_for_reloc (int r_type
, int dynamic
, int shared
, int pie
)
2618 /* May appear in GOT entries. */
2620 return (dynamic
? 2 : shared
? 1 : 0);
2621 case R_ALPHA_TLSLDM
:
2623 case R_ALPHA_LITERAL
:
2624 return dynamic
|| shared
;
2625 case R_ALPHA_GOTTPREL
:
2626 return dynamic
|| (shared
&& !pie
);
2627 case R_ALPHA_GOTDTPREL
:
2630 /* May appear in data sections. */
2631 case R_ALPHA_REFLONG
:
2632 case R_ALPHA_REFQUAD
:
2633 return dynamic
|| shared
;
2634 case R_ALPHA_TPREL64
:
2635 return dynamic
|| (shared
&& !pie
);
2637 /* Everything else is illegal. We'll issue an error during
2638 relocate_section. */
2644 /* Work out the sizes of the dynamic relocation entries. */
2647 elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry
*h
,
2648 struct bfd_link_info
*info
)
2650 bfd_boolean dynamic
;
2651 struct alpha_elf_reloc_entry
*relent
;
2652 unsigned long entries
;
2654 /* If the symbol was defined as a common symbol in a regular object
2655 file, and there was no definition in any dynamic object, then the
2656 linker will have allocated space for the symbol in a common
2657 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
2658 set. This is done for dynamic symbols in
2659 elf_adjust_dynamic_symbol but this is not done for non-dynamic
2660 symbols, somehow. */
2661 if (!h
->root
.def_regular
2662 && h
->root
.ref_regular
2663 && !h
->root
.def_dynamic
2664 && (h
->root
.root
.type
== bfd_link_hash_defined
2665 || h
->root
.root
.type
== bfd_link_hash_defweak
)
2666 && !(h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
))
2667 h
->root
.def_regular
= 1;
2669 /* If the symbol is dynamic, we'll need all the relocations in their
2670 natural form. If this is a shared object, and it has been forced
2671 local, we'll need the same number of RELATIVE relocations. */
2672 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2674 /* If the symbol is a hidden undefined weak, then we never have any
2675 relocations. Avoid the loop which may want to add RELATIVE relocs
2676 based on bfd_link_pic (info). */
2677 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2680 for (relent
= h
->reloc_entries
; relent
; relent
= relent
->next
)
2682 entries
= alpha_dynamic_entries_for_reloc (relent
->rtype
, dynamic
,
2683 bfd_link_pic (info
),
2684 bfd_link_pie (info
));
2687 asection
*sec
= relent
->sec
;
2688 relent
->srel
->size
+=
2689 entries
* sizeof (Elf64_External_Rela
) * relent
->count
;
2690 if ((sec
->flags
& SEC_READONLY
) != 0)
2692 info
->flags
|= DT_TEXTREL
;
2693 info
->callbacks
->minfo
2694 (_("%pB: dynamic relocation against `%pT' in "
2695 "read-only section `%pA'\n"),
2696 sec
->owner
, h
->root
.root
.root
.string
, sec
);
2704 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
2708 elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry
*h
,
2709 struct bfd_link_info
*info
)
2711 bfd_boolean dynamic
;
2712 struct alpha_elf_got_entry
*gotent
;
2713 unsigned long entries
;
2715 /* If we're using a plt for this symbol, then all of its relocations
2716 for its got entries go into .rela.plt. */
2717 if (h
->root
.needs_plt
)
2720 /* If the symbol is dynamic, we'll need all the relocations in their
2721 natural form. If this is a shared object, and it has been forced
2722 local, we'll need the same number of RELATIVE relocations. */
2723 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2725 /* If the symbol is a hidden undefined weak, then we never have any
2726 relocations. Avoid the loop which may want to add RELATIVE relocs
2727 based on bfd_link_pic (info). */
2728 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2732 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2733 if (gotent
->use_count
> 0)
2734 entries
+= alpha_dynamic_entries_for_reloc (gotent
->reloc_type
, dynamic
,
2735 bfd_link_pic (info
),
2736 bfd_link_pie (info
));
2740 asection
*srel
= elf_hash_table(info
)->srelgot
;
2741 BFD_ASSERT (srel
!= NULL
);
2742 srel
->size
+= sizeof (Elf64_External_Rela
) * entries
;
2748 /* Set the sizes of the dynamic relocation sections. */
2751 elf64_alpha_size_rela_got_section (struct bfd_link_info
*info
)
2753 unsigned long entries
;
2756 struct alpha_elf_link_hash_table
* htab
;
2758 htab
= alpha_elf_hash_table (info
);
2762 /* Shared libraries often require RELATIVE relocs, and some relocs
2763 require attention for the main application as well. */
2766 for (i
= htab
->got_list
;
2767 i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2771 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2773 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2776 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2777 if (!local_got_entries
)
2780 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2781 for (gotent
= local_got_entries
[k
];
2782 gotent
; gotent
= gotent
->next
)
2783 if (gotent
->use_count
> 0)
2784 entries
+= (alpha_dynamic_entries_for_reloc
2785 (gotent
->reloc_type
, 0, bfd_link_pic (info
),
2786 bfd_link_pie (info
)));
2790 srel
= elf_hash_table(info
)->srelgot
;
2793 BFD_ASSERT (entries
== 0);
2796 srel
->size
= sizeof (Elf64_External_Rela
) * entries
;
2798 /* Now do the non-local symbols. */
2799 alpha_elf_link_hash_traverse (htab
,
2800 elf64_alpha_size_rela_got_1
, info
);
2803 /* Set the sizes of the dynamic sections. */
2806 elf64_alpha_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2807 struct bfd_link_info
*info
)
2811 bfd_boolean relplt
, relocs
;
2812 struct alpha_elf_link_hash_table
* htab
;
2814 htab
= alpha_elf_hash_table (info
);
2818 dynobj
= elf_hash_table(info
)->dynobj
;
2819 BFD_ASSERT(dynobj
!= NULL
);
2821 if (elf_hash_table (info
)->dynamic_sections_created
)
2823 /* Set the contents of the .interp section to the interpreter. */
2824 if (bfd_link_executable (info
) && !info
->nointerp
)
2826 s
= bfd_get_linker_section (dynobj
, ".interp");
2827 BFD_ASSERT (s
!= NULL
);
2828 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2829 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2832 /* Now that we've seen all of the input files, we can decide which
2833 symbols need dynamic relocation entries and which don't. We've
2834 collected information in check_relocs that we can now apply to
2835 size the dynamic relocation sections. */
2836 alpha_elf_link_hash_traverse (htab
,
2837 elf64_alpha_calc_dynrel_sizes
, info
);
2839 elf64_alpha_size_rela_got_section (info
);
2840 elf64_alpha_size_plt_section (info
);
2842 /* else we're not dynamic and by definition we don't need such things. */
2844 /* The check_relocs and adjust_dynamic_symbol entry points have
2845 determined the sizes of the various dynamic sections. Allocate
2849 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2853 if (!(s
->flags
& SEC_LINKER_CREATED
))
2856 /* It's OK to base decisions on the section name, because none
2857 of the dynobj section names depend upon the input files. */
2858 name
= bfd_section_name (s
);
2860 if (CONST_STRNEQ (name
, ".rela"))
2864 if (strcmp (name
, ".rela.plt") == 0)
2869 /* We use the reloc_count field as a counter if we need
2870 to copy relocs into the output file. */
2874 else if (! CONST_STRNEQ (name
, ".got")
2875 && strcmp (name
, ".plt") != 0
2876 && strcmp (name
, ".dynbss") != 0)
2878 /* It's not one of our dynamic sections, so don't allocate space. */
2884 /* If we don't need this section, strip it from the output file.
2885 This is to handle .rela.bss and .rela.plt. We must create it
2886 in create_dynamic_sections, because it must be created before
2887 the linker maps input sections to output sections. The
2888 linker does that before adjust_dynamic_symbol is called, and
2889 it is that function which decides whether anything needs to
2890 go into these sections. */
2891 if (!CONST_STRNEQ (name
, ".got"))
2892 s
->flags
|= SEC_EXCLUDE
;
2894 else if ((s
->flags
& SEC_HAS_CONTENTS
) != 0)
2896 /* Allocate memory for the section contents. */
2897 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2898 if (s
->contents
== NULL
)
2903 if (elf_hash_table (info
)->dynamic_sections_created
)
2905 /* Add some entries to the .dynamic section. We fill in the
2906 values later, in elf64_alpha_finish_dynamic_sections, but we
2907 must add the entries now so that we get the correct size for
2908 the .dynamic section. The DT_DEBUG entry is filled in by the
2909 dynamic linker and used by the debugger. */
2910 #define add_dynamic_entry(TAG, VAL) \
2911 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2913 if (!_bfd_elf_add_dynamic_tags (output_bfd
, info
,
2918 && elf64_alpha_use_secureplt
2919 && !add_dynamic_entry (DT_ALPHA_PLTRO
, 1))
2922 #undef add_dynamic_entry
2927 /* These functions do relaxation for Alpha ELF.
2929 Currently I'm only handling what I can do with existing compiler
2930 and assembler support, which means no instructions are removed,
2931 though some may be nopped. At this time GCC does not emit enough
2932 information to do all of the relaxing that is possible. It will
2933 take some not small amount of work for that to happen.
2935 There are a couple of interesting papers that I once read on this
2936 subject, that I cannot find references to at the moment, that
2937 related to Alpha in particular. They are by David Wall, then of
2940 struct alpha_relax_info
2945 Elf_Internal_Shdr
*symtab_hdr
;
2946 Elf_Internal_Rela
*relocs
, *relend
;
2947 struct bfd_link_info
*link_info
;
2951 struct alpha_elf_link_hash_entry
*h
;
2952 struct alpha_elf_got_entry
**first_gotent
;
2953 struct alpha_elf_got_entry
*gotent
;
2954 bfd_boolean changed_contents
;
2955 bfd_boolean changed_relocs
;
2956 unsigned char other
;
2959 static Elf_Internal_Rela
*
2960 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela
*rel
,
2961 Elf_Internal_Rela
*relend
,
2962 bfd_vma offset
, int type
)
2964 while (rel
< relend
)
2966 if (rel
->r_offset
== offset
2967 && ELF64_R_TYPE (rel
->r_info
) == (unsigned int) type
)
2975 elf64_alpha_relax_got_load (struct alpha_relax_info
*info
, bfd_vma symval
,
2976 Elf_Internal_Rela
*irel
, unsigned long r_type
)
2979 bfd_signed_vma disp
;
2981 /* Get the instruction. */
2982 insn
= bfd_get_32 (info
->abfd
, info
->contents
+ irel
->r_offset
);
2984 if (insn
>> 26 != OP_LDQ
)
2986 reloc_howto_type
*howto
= elf64_alpha_howto_table
+ r_type
;
2988 /* xgettext:c-format */
2989 (_("%pB: %pA+%#" PRIx64
": warning: "
2990 "%s relocation against unexpected insn"),
2991 info
->abfd
, info
->sec
, (uint64_t) irel
->r_offset
, howto
->name
);
2995 /* Can't relax dynamic symbols. */
2996 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
2999 /* Can't use local-exec relocations in shared libraries. */
3000 if (r_type
== R_ALPHA_GOTTPREL
3001 && bfd_link_dll (info
->link_info
))
3004 if (r_type
== R_ALPHA_LITERAL
)
3006 /* Look for nice constant addresses. This includes the not-uncommon
3007 special case of 0 for undefweak symbols. */
3008 if ((info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3009 || (!bfd_link_pic (info
->link_info
)
3010 && (symval
>= (bfd_vma
)-0x8000 || symval
< 0x8000)))
3013 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3014 insn
|= (symval
& 0xffff);
3015 r_type
= R_ALPHA_NONE
;
3019 /* We may only create GPREL relocs during the second pass. */
3020 if (info
->link_info
->relax_pass
== 0)
3023 disp
= symval
- info
->gp
;
3024 insn
= (OP_LDA
<< 26) | (insn
& 0x03ff0000);
3025 r_type
= R_ALPHA_GPREL16
;
3030 bfd_vma dtp_base
, tp_base
;
3032 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3033 dtp_base
= alpha_get_dtprel_base (info
->link_info
);
3034 tp_base
= alpha_get_tprel_base (info
->link_info
);
3035 disp
= symval
- (r_type
== R_ALPHA_GOTDTPREL
? dtp_base
: tp_base
);
3037 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3041 case R_ALPHA_GOTDTPREL
:
3042 r_type
= R_ALPHA_DTPREL16
;
3044 case R_ALPHA_GOTTPREL
:
3045 r_type
= R_ALPHA_TPREL16
;
3053 if (disp
< -0x8000 || disp
>= 0x8000)
3056 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, info
->contents
+ irel
->r_offset
);
3057 info
->changed_contents
= TRUE
;
3059 /* Reduce the use count on this got entry by one, possibly
3061 if (--info
->gotent
->use_count
== 0)
3063 int sz
= alpha_got_entry_size (r_type
);
3064 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3066 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3069 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3070 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
), r_type
);
3071 info
->changed_relocs
= TRUE
;
3073 /* ??? Search forward through this basic block looking for insns
3074 that use the target register. Stop after an insn modifying the
3075 register is seen, or after a branch or call.
3077 Any such memory load insn may be substituted by a load directly
3078 off the GP. This allows the memory load insn to be issued before
3079 the calculated GP register would otherwise be ready.
3081 Any such jsr insn can be replaced by a bsr if it is in range.
3083 This would mean that we'd have to _add_ relocations, the pain of
3084 which gives one pause. */
3090 elf64_alpha_relax_opt_call (struct alpha_relax_info
*info
, bfd_vma symval
)
3092 /* If the function has the same gp, and we can identify that the
3093 function does not use its function pointer, we can eliminate the
3096 /* If the symbol is marked NOPV, we are being told the function never
3097 needs its procedure value. */
3098 if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_NOPV
)
3101 /* If the symbol is marked STD_GP, we are being told the function does
3102 a normal ldgp in the first two words. */
3103 else if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_STD_GPLOAD
)
3106 /* Otherwise, we may be able to identify a GP load in the first two
3107 words, which we can then skip. */
3110 Elf_Internal_Rela
*tsec_relocs
, *tsec_relend
, *tsec_free
, *gpdisp
;
3113 /* Load the relocations from the section that the target symbol is in. */
3114 if (info
->sec
== info
->tsec
)
3116 tsec_relocs
= info
->relocs
;
3117 tsec_relend
= info
->relend
;
3122 tsec_relocs
= (_bfd_elf_link_read_relocs
3123 (info
->abfd
, info
->tsec
, NULL
,
3124 (Elf_Internal_Rela
*) NULL
,
3125 info
->link_info
->keep_memory
));
3126 if (tsec_relocs
== NULL
)
3128 tsec_relend
= tsec_relocs
+ info
->tsec
->reloc_count
;
3129 tsec_free
= (elf_section_data (info
->tsec
)->relocs
== tsec_relocs
3134 /* Recover the symbol's offset within the section. */
3135 ofs
= (symval
- info
->tsec
->output_section
->vma
3136 - info
->tsec
->output_offset
);
3138 /* Look for a GPDISP reloc. */
3139 gpdisp
= (elf64_alpha_find_reloc_at_ofs
3140 (tsec_relocs
, tsec_relend
, ofs
, R_ALPHA_GPDISP
));
3142 if (!gpdisp
|| gpdisp
->r_addend
!= 4)
3150 /* We've now determined that we can skip an initial gp load. Verify
3151 that the call and the target use the same gp. */
3152 if (info
->link_info
->output_bfd
->xvec
!= info
->tsec
->owner
->xvec
3153 || info
->gotobj
!= alpha_elf_tdata (info
->tsec
->owner
)->gotobj
)
3160 elf64_alpha_relax_with_lituse (struct alpha_relax_info
*info
,
3161 bfd_vma symval
, Elf_Internal_Rela
*irel
)
3163 Elf_Internal_Rela
*urel
, *erel
, *irelend
= info
->relend
;
3165 bfd_signed_vma disp
;
3168 bfd_boolean lit_reused
= FALSE
;
3169 bfd_boolean all_optimized
= TRUE
;
3170 bfd_boolean changed_contents
;
3171 bfd_boolean changed_relocs
;
3172 bfd_byte
*contents
= info
->contents
;
3173 bfd
*abfd
= info
->abfd
;
3174 bfd_vma sec_output_vma
;
3175 unsigned int lit_insn
;
3178 lit_insn
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
3179 if (lit_insn
>> 26 != OP_LDQ
)
3182 /* xgettext:c-format */
3183 (_("%pB: %pA+%#" PRIx64
": warning: "
3184 "%s relocation against unexpected insn"),
3185 abfd
, info
->sec
, (uint64_t) irel
->r_offset
, "LITERAL");
3189 /* Can't relax dynamic symbols. */
3190 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3193 changed_contents
= info
->changed_contents
;
3194 changed_relocs
= info
->changed_relocs
;
3195 sec_output_vma
= info
->sec
->output_section
->vma
+ info
->sec
->output_offset
;
3196 relax_pass
= info
->link_info
->relax_pass
;
3198 /* Summarize how this particular LITERAL is used. */
3199 for (erel
= irel
+1, flags
= 0; erel
< irelend
; ++erel
)
3201 if (ELF64_R_TYPE (erel
->r_info
) != R_ALPHA_LITUSE
)
3203 if (erel
->r_addend
<= 6)
3204 flags
|= 1 << erel
->r_addend
;
3207 /* A little preparation for the loop... */
3208 disp
= symval
- info
->gp
;
3210 for (urel
= irel
+1; urel
< erel
; ++urel
)
3212 bfd_vma urel_r_offset
= urel
->r_offset
;
3215 bfd_signed_vma xdisp
;
3216 Elf_Internal_Rela nrel
;
3218 insn
= bfd_get_32 (abfd
, contents
+ urel_r_offset
);
3220 switch (urel
->r_addend
)
3222 case LITUSE_ALPHA_ADDR
:
3224 /* This type is really just a placeholder to note that all
3225 uses cannot be optimized, but to still allow some. */
3226 all_optimized
= FALSE
;
3229 case LITUSE_ALPHA_BASE
:
3230 /* We may only create GPREL relocs during the second pass. */
3231 if (relax_pass
== 0)
3233 all_optimized
= FALSE
;
3237 /* We can always optimize 16-bit displacements. */
3239 /* Extract the displacement from the instruction, sign-extending
3240 it if necessary, then test whether it is within 16 or 32 bits
3241 displacement from GP. */
3242 insn_disp
= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
3244 xdisp
= disp
+ insn_disp
;
3245 fits16
= (xdisp
>= - (bfd_signed_vma
) 0x8000 && xdisp
< 0x8000);
3246 fits32
= (xdisp
>= - (bfd_signed_vma
) 0x80000000
3247 && xdisp
< 0x7fff8000);
3251 /* Take the op code and dest from this insn, take the base
3252 register from the literal insn. Leave the offset alone. */
3253 insn
= (insn
& 0xffe0ffff) | (lit_insn
& 0x001f0000);
3254 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3255 changed_contents
= TRUE
;
3258 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3260 nrel
.r_addend
= irel
->r_addend
;
3262 /* As we adjust, move the reloc to the end so that we don't
3263 break the LITERAL+LITUSE chain. */
3267 changed_relocs
= TRUE
;
3270 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3271 else if (fits32
&& !(flags
& ~6))
3273 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3275 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3277 lit_insn
= (OP_LDAH
<< 26) | (lit_insn
& 0x03ff0000);
3278 bfd_put_32 (abfd
, (bfd_vma
) lit_insn
, contents
+ irel
->r_offset
);
3280 changed_contents
= TRUE
;
3282 /* Since all relocs must be optimized, don't bother swapping
3283 this relocation to the end. */
3284 urel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3286 urel
->r_addend
= irel
->r_addend
;
3287 changed_relocs
= TRUE
;
3290 all_optimized
= FALSE
;
3293 case LITUSE_ALPHA_BYTOFF
:
3294 /* We can always optimize byte instructions. */
3296 /* FIXME: sanity check the insn for byte op. Check that the
3297 literal dest reg is indeed Rb in the byte insn. */
3299 insn
&= ~ (unsigned) 0x001ff000;
3300 insn
|= ((symval
& 7) << 13) | 0x1000;
3301 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3302 changed_contents
= TRUE
;
3305 nrel
.r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3308 /* As we adjust, move the reloc to the end so that we don't
3309 break the LITERAL+LITUSE chain. */
3313 changed_relocs
= TRUE
;
3316 case LITUSE_ALPHA_JSR
:
3317 case LITUSE_ALPHA_TLSGD
:
3318 case LITUSE_ALPHA_TLSLDM
:
3319 case LITUSE_ALPHA_JSRDIRECT
:
3321 bfd_vma optdest
, org
;
3322 bfd_signed_vma odisp
;
3324 /* For undefined weak symbols, we're mostly interested in getting
3325 rid of the got entry whenever possible, so optimize this to a
3326 use of the zero register. */
3327 if (info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3330 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3332 changed_contents
= TRUE
;
3336 /* If not zero, place to jump without needing pv. */
3337 optdest
= elf64_alpha_relax_opt_call (info
, symval
);
3338 org
= sec_output_vma
+ urel_r_offset
+ 4;
3339 odisp
= (optdest
? optdest
: symval
) - org
;
3341 if (odisp
>= -0x400000 && odisp
< 0x400000)
3343 Elf_Internal_Rela
*xrel
;
3345 /* Preserve branch prediction call stack when possible. */
3346 if ((insn
& INSN_JSR_MASK
) == INSN_JSR
)
3347 insn
= (OP_BSR
<< 26) | (insn
& 0x03e00000);
3349 insn
= (OP_BR
<< 26) | (insn
& 0x03e00000);
3350 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3351 changed_contents
= TRUE
;
3354 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3356 nrel
.r_addend
= irel
->r_addend
;
3359 nrel
.r_addend
+= optdest
- symval
;
3361 all_optimized
= FALSE
;
3363 /* Kill any HINT reloc that might exist for this insn. */
3364 xrel
= (elf64_alpha_find_reloc_at_ofs
3365 (info
->relocs
, info
->relend
, urel_r_offset
,
3368 xrel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3370 /* As we adjust, move the reloc to the end so that we don't
3371 break the LITERAL+LITUSE chain. */
3376 info
->changed_relocs
= TRUE
;
3379 all_optimized
= FALSE
;
3381 /* Even if the target is not in range for a direct branch,
3382 if we share a GP, we can eliminate the gp reload. */
3385 Elf_Internal_Rela
*gpdisp
3386 = (elf64_alpha_find_reloc_at_ofs
3387 (info
->relocs
, irelend
, urel_r_offset
+ 4,
3391 bfd_byte
*p_ldah
= contents
+ gpdisp
->r_offset
;
3392 bfd_byte
*p_lda
= p_ldah
+ gpdisp
->r_addend
;
3393 unsigned int ldah
= bfd_get_32 (abfd
, p_ldah
);
3394 unsigned int lda
= bfd_get_32 (abfd
, p_lda
);
3396 /* Verify that the instruction is "ldah $29,0($26)".
3397 Consider a function that ends in a noreturn call,
3398 and that the next function begins with an ldgp,
3399 and that by accident there is no padding between.
3400 In that case the insn would use $27 as the base. */
3401 if (ldah
== 0x27ba0000 && lda
== 0x23bd0000)
3403 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_ldah
);
3404 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_lda
);
3406 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3407 changed_contents
= TRUE
;
3408 changed_relocs
= TRUE
;
3417 /* If we reused the literal instruction, we must have optimized all. */
3418 BFD_ASSERT(!lit_reused
|| all_optimized
);
3420 /* If all cases were optimized, we can reduce the use count on this
3421 got entry by one, possibly eliminating it. */
3424 if (--info
->gotent
->use_count
== 0)
3426 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3427 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3429 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3432 /* If the literal instruction is no longer needed (it may have been
3433 reused. We can eliminate it. */
3434 /* ??? For now, I don't want to deal with compacting the section,
3435 so just nop it out. */
3438 irel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3439 changed_relocs
= TRUE
;
3441 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, contents
+ irel
->r_offset
);
3442 changed_contents
= TRUE
;
3446 info
->changed_contents
= changed_contents
;
3447 info
->changed_relocs
= changed_relocs
;
3449 if (all_optimized
|| relax_pass
== 0)
3451 return elf64_alpha_relax_got_load (info
, symval
, irel
, R_ALPHA_LITERAL
);
3455 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info
*info
, bfd_vma symval
,
3456 Elf_Internal_Rela
*irel
, bfd_boolean is_gd
)
3459 unsigned int insn
, tlsgd_reg
;
3460 Elf_Internal_Rela
*gpdisp
, *hint
;
3461 bfd_boolean dynamic
, use_gottprel
;
3462 unsigned long new_symndx
;
3464 dynamic
= alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
);
3466 /* If a TLS symbol is accessed using IE at least once, there is no point
3467 to use dynamic model for it. */
3468 if (is_gd
&& info
->h
&& (info
->h
->flags
& ALPHA_ELF_LINK_HASH_TLS_IE
))
3471 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3472 then we might as well relax to IE. */
3473 else if (bfd_link_pic (info
->link_info
) && !dynamic
3474 && (info
->link_info
->flags
& DF_STATIC_TLS
))
3477 /* Otherwise we must be building an executable to do anything. */
3478 else if (bfd_link_pic (info
->link_info
))
3481 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3482 the matching LITUSE_TLS relocations. */
3483 if (irel
+ 2 >= info
->relend
)
3485 if (ELF64_R_TYPE (irel
[1].r_info
) != R_ALPHA_LITERAL
3486 || ELF64_R_TYPE (irel
[2].r_info
) != R_ALPHA_LITUSE
3487 || irel
[2].r_addend
!= (is_gd
? LITUSE_ALPHA_TLSGD
: LITUSE_ALPHA_TLSLDM
))
3490 /* There must be a GPDISP relocation positioned immediately after the
3491 LITUSE relocation. */
3492 gpdisp
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3493 irel
[2].r_offset
+ 4, R_ALPHA_GPDISP
);
3497 pos
[0] = info
->contents
+ irel
[0].r_offset
;
3498 pos
[1] = info
->contents
+ irel
[1].r_offset
;
3499 pos
[2] = info
->contents
+ irel
[2].r_offset
;
3500 pos
[3] = info
->contents
+ gpdisp
->r_offset
;
3501 pos
[4] = pos
[3] + gpdisp
->r_addend
;
3503 /* Beware of the compiler hoisting part of the sequence out a loop
3504 and adjusting the destination register for the TLSGD insn. If this
3505 happens, there will be a move into $16 before the JSR insn, so only
3506 transformations of the first insn pair should use this register. */
3507 tlsgd_reg
= bfd_get_32 (info
->abfd
, pos
[0]);
3508 tlsgd_reg
= (tlsgd_reg
>> 21) & 31;
3510 /* Generally, the positions are not allowed to be out of order, lest the
3511 modified insn sequence have different register lifetimes. We can make
3512 an exception when pos 1 is adjacent to pos 0. */
3513 if (pos
[1] + 4 == pos
[0])
3515 bfd_byte
*tmp
= pos
[0];
3519 if (pos
[1] >= pos
[2] || pos
[2] >= pos
[3])
3522 /* Reduce the use count on the LITERAL relocation. Do this before we
3523 smash the symndx when we adjust the relocations below. */
3525 struct alpha_elf_got_entry
*lit_gotent
;
3526 struct alpha_elf_link_hash_entry
*lit_h
;
3529 BFD_ASSERT (ELF64_R_SYM (irel
[1].r_info
) >= info
->symtab_hdr
->sh_info
);
3530 indx
= ELF64_R_SYM (irel
[1].r_info
) - info
->symtab_hdr
->sh_info
;
3531 lit_h
= alpha_elf_sym_hashes (info
->abfd
)[indx
];
3533 while (lit_h
->root
.root
.type
== bfd_link_hash_indirect
3534 || lit_h
->root
.root
.type
== bfd_link_hash_warning
)
3535 lit_h
= (struct alpha_elf_link_hash_entry
*) lit_h
->root
.root
.u
.i
.link
;
3537 for (lit_gotent
= lit_h
->got_entries
; lit_gotent
;
3538 lit_gotent
= lit_gotent
->next
)
3539 if (lit_gotent
->gotobj
== info
->gotobj
3540 && lit_gotent
->reloc_type
== R_ALPHA_LITERAL
3541 && lit_gotent
->addend
== irel
[1].r_addend
)
3543 BFD_ASSERT (lit_gotent
);
3545 if (--lit_gotent
->use_count
== 0)
3547 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3548 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3554 lda $16,x($gp) !tlsgd!1
3555 ldq $27,__tls_get_addr($gp) !literal!1
3556 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3557 ldah $29,0($26) !gpdisp!2
3558 lda $29,0($29) !gpdisp!2
3560 ldq $16,x($gp) !gottprel
3565 or the first pair to
3566 lda $16,x($gp) !tprel
3569 ldah $16,x($gp) !tprelhi
3570 lda $16,x($16) !tprello
3574 use_gottprel
= FALSE
;
3575 new_symndx
= is_gd
? ELF64_R_SYM (irel
->r_info
) : STN_UNDEF
;
3577 /* Some compilers warn about a Boolean-looking expression being
3578 used in a switch. The explicit cast silences them. */
3579 switch ((int) (!dynamic
&& !bfd_link_pic (info
->link_info
)))
3584 bfd_signed_vma disp
;
3586 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3587 tp_base
= alpha_get_tprel_base (info
->link_info
);
3588 disp
= symval
- tp_base
;
3590 if (disp
>= -0x8000 && disp
< 0x8000)
3592 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3593 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3594 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3596 irel
[0].r_offset
= pos
[0] - info
->contents
;
3597 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPREL16
);
3598 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3601 else if (disp
>= -(bfd_signed_vma
) 0x80000000
3602 && disp
< (bfd_signed_vma
) 0x7fff8000
3603 && pos
[0] + 4 == pos
[1])
3605 insn
= (OP_LDAH
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3606 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3607 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (tlsgd_reg
<< 16);
3608 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[1]);
3610 irel
[0].r_offset
= pos
[0] - info
->contents
;
3611 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELHI
);
3612 irel
[1].r_offset
= pos
[1] - info
->contents
;
3613 irel
[1].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELLO
);
3620 use_gottprel
= TRUE
;
3622 insn
= (OP_LDQ
<< 26) | (tlsgd_reg
<< 21) | (29 << 16);
3623 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3624 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3626 irel
[0].r_offset
= pos
[0] - info
->contents
;
3627 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_GOTTPREL
);
3628 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3632 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_RDUNIQ
, pos
[2]);
3634 insn
= INSN_ADDQ
| (16 << 21) | (0 << 16) | (0 << 0);
3635 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[3]);
3637 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[4]);
3639 irel
[2].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3640 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3642 hint
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3643 irel
[2].r_offset
, R_ALPHA_HINT
);
3645 hint
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3647 info
->changed_contents
= TRUE
;
3648 info
->changed_relocs
= TRUE
;
3650 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3651 if (--info
->gotent
->use_count
== 0)
3653 int sz
= alpha_got_entry_size (info
->gotent
->reloc_type
);
3654 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3656 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3659 /* If we've switched to a GOTTPREL relocation, increment the reference
3660 count on that got entry. */
3663 struct alpha_elf_got_entry
*tprel_gotent
;
3665 for (tprel_gotent
= *info
->first_gotent
; tprel_gotent
;
3666 tprel_gotent
= tprel_gotent
->next
)
3667 if (tprel_gotent
->gotobj
== info
->gotobj
3668 && tprel_gotent
->reloc_type
== R_ALPHA_GOTTPREL
3669 && tprel_gotent
->addend
== irel
->r_addend
)
3672 tprel_gotent
->use_count
++;
3675 if (info
->gotent
->use_count
== 0)
3676 tprel_gotent
= info
->gotent
;
3679 tprel_gotent
= (struct alpha_elf_got_entry
*)
3680 bfd_alloc (info
->abfd
, sizeof (struct alpha_elf_got_entry
));
3684 tprel_gotent
->next
= *info
->first_gotent
;
3685 *info
->first_gotent
= tprel_gotent
;
3687 tprel_gotent
->gotobj
= info
->gotobj
;
3688 tprel_gotent
->addend
= irel
->r_addend
;
3689 tprel_gotent
->got_offset
= -1;
3690 tprel_gotent
->reloc_done
= 0;
3691 tprel_gotent
->reloc_xlated
= 0;
3694 tprel_gotent
->use_count
= 1;
3695 tprel_gotent
->reloc_type
= R_ALPHA_GOTTPREL
;
3703 elf64_alpha_relax_section (bfd
*abfd
, asection
*sec
,
3704 struct bfd_link_info
*link_info
, bfd_boolean
*again
)
3706 Elf_Internal_Shdr
*symtab_hdr
;
3707 Elf_Internal_Rela
*internal_relocs
;
3708 Elf_Internal_Rela
*irel
, *irelend
;
3709 Elf_Internal_Sym
*isymbuf
= NULL
;
3710 struct alpha_elf_got_entry
**local_got_entries
;
3711 struct alpha_relax_info info
;
3712 struct alpha_elf_link_hash_table
* htab
;
3715 htab
= alpha_elf_hash_table (link_info
);
3719 /* There's nothing to change, yet. */
3722 if (bfd_link_relocatable (link_info
)
3723 || ((sec
->flags
& (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3724 != (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3725 || sec
->reloc_count
== 0)
3728 BFD_ASSERT (is_alpha_elf (abfd
));
3729 relax_pass
= link_info
->relax_pass
;
3731 /* Make sure our GOT and PLT tables are up-to-date. */
3732 if (htab
->relax_trip
!= link_info
->relax_trip
)
3734 htab
->relax_trip
= link_info
->relax_trip
;
3736 /* This should never fail after the initial round, since the only error
3737 is GOT overflow, and relaxation only shrinks the table. However, we
3738 may only merge got sections during the first pass. If we merge
3739 sections after we've created GPREL relocs, the GP for the merged
3740 section backs up which may put the relocs out of range. */
3741 if (!elf64_alpha_size_got_sections (link_info
, relax_pass
== 0))
3743 if (elf_hash_table (link_info
)->dynamic_sections_created
)
3745 elf64_alpha_size_plt_section (link_info
);
3746 elf64_alpha_size_rela_got_section (link_info
);
3750 symtab_hdr
= &elf_symtab_hdr (abfd
);
3751 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
3753 /* Load the relocations for this section. */
3754 internal_relocs
= (_bfd_elf_link_read_relocs
3755 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3756 link_info
->keep_memory
));
3757 if (internal_relocs
== NULL
)
3760 memset(&info
, 0, sizeof (info
));
3763 info
.link_info
= link_info
;
3764 info
.symtab_hdr
= symtab_hdr
;
3765 info
.relocs
= internal_relocs
;
3766 info
.relend
= irelend
= internal_relocs
+ sec
->reloc_count
;
3768 /* Find the GP for this object. Do not store the result back via
3769 _bfd_set_gp_value, since this could change again before final. */
3770 info
.gotobj
= alpha_elf_tdata (abfd
)->gotobj
;
3773 asection
*sgot
= alpha_elf_tdata (info
.gotobj
)->got
;
3774 info
.gp
= (sgot
->output_section
->vma
3775 + sgot
->output_offset
3779 /* Get the section contents. */
3780 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3781 info
.contents
= elf_section_data (sec
)->this_hdr
.contents
;
3784 if (!bfd_malloc_and_get_section (abfd
, sec
, &info
.contents
))
3788 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3791 struct alpha_elf_got_entry
*gotent
;
3792 unsigned long r_type
= ELF64_R_TYPE (irel
->r_info
);
3793 unsigned long r_symndx
= ELF64_R_SYM (irel
->r_info
);
3795 /* Early exit for unhandled or unrelaxable relocations. */
3796 if (r_type
!= R_ALPHA_LITERAL
)
3798 /* We complete everything except LITERAL in the first pass. */
3799 if (relax_pass
!= 0)
3801 if (r_type
== R_ALPHA_TLSLDM
)
3803 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3804 reloc to the STN_UNDEF (0) symbol so that they all match. */
3805 r_symndx
= STN_UNDEF
;
3807 else if (r_type
!= R_ALPHA_GOTDTPREL
3808 && r_type
!= R_ALPHA_GOTTPREL
3809 && r_type
!= R_ALPHA_TLSGD
)
3813 /* Get the value of the symbol referred to by the reloc. */
3814 if (r_symndx
< symtab_hdr
->sh_info
)
3816 /* A local symbol. */
3817 Elf_Internal_Sym
*isym
;
3819 /* Read this BFD's local symbols. */
3820 if (isymbuf
== NULL
)
3822 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3823 if (isymbuf
== NULL
)
3824 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
3825 symtab_hdr
->sh_info
, 0,
3827 if (isymbuf
== NULL
)
3831 isym
= isymbuf
+ r_symndx
;
3833 /* Given the symbol for a TLSLDM reloc is ignored, this also
3834 means forcing the symbol value to the tp base. */
3835 if (r_type
== R_ALPHA_TLSLDM
)
3837 info
.tsec
= bfd_abs_section_ptr
;
3838 symval
= alpha_get_tprel_base (info
.link_info
);
3842 symval
= isym
->st_value
;
3843 if (isym
->st_shndx
== SHN_UNDEF
)
3845 else if (isym
->st_shndx
== SHN_ABS
)
3846 info
.tsec
= bfd_abs_section_ptr
;
3847 else if (isym
->st_shndx
== SHN_COMMON
)
3848 info
.tsec
= bfd_com_section_ptr
;
3850 info
.tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3854 info
.other
= isym
->st_other
;
3855 if (local_got_entries
)
3856 info
.first_gotent
= &local_got_entries
[r_symndx
];
3859 info
.first_gotent
= &info
.gotent
;
3866 struct alpha_elf_link_hash_entry
*h
;
3868 indx
= r_symndx
- symtab_hdr
->sh_info
;
3869 h
= alpha_elf_sym_hashes (abfd
)[indx
];
3870 BFD_ASSERT (h
!= NULL
);
3872 while (h
->root
.root
.type
== bfd_link_hash_indirect
3873 || h
->root
.root
.type
== bfd_link_hash_warning
)
3874 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
3876 /* If the symbol is undefined, we can't do anything with it. */
3877 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
3880 /* If the symbol isn't defined in the current module,
3881 again we can't do anything. */
3882 if (h
->root
.root
.type
== bfd_link_hash_undefweak
)
3884 info
.tsec
= bfd_abs_section_ptr
;
3887 else if (!h
->root
.def_regular
)
3889 /* Except for TLSGD relocs, which can sometimes be
3890 relaxed to GOTTPREL relocs. */
3891 if (r_type
!= R_ALPHA_TLSGD
)
3893 info
.tsec
= bfd_abs_section_ptr
;
3898 info
.tsec
= h
->root
.root
.u
.def
.section
;
3899 symval
= h
->root
.root
.u
.def
.value
;
3903 info
.other
= h
->root
.other
;
3904 info
.first_gotent
= &h
->got_entries
;
3907 /* Search for the got entry to be used by this relocation. */
3908 for (gotent
= *info
.first_gotent
; gotent
; gotent
= gotent
->next
)
3909 if (gotent
->gotobj
== info
.gotobj
3910 && gotent
->reloc_type
== r_type
3911 && gotent
->addend
== irel
->r_addend
)
3913 info
.gotent
= gotent
;
3915 symval
+= info
.tsec
->output_section
->vma
+ info
.tsec
->output_offset
;
3916 symval
+= irel
->r_addend
;
3920 case R_ALPHA_LITERAL
:
3921 BFD_ASSERT(info
.gotent
!= NULL
);
3923 /* If there exist LITUSE relocations immediately following, this
3924 opens up all sorts of interesting optimizations, because we
3925 now know every location that this address load is used. */
3926 if (irel
+1 < irelend
3927 && ELF64_R_TYPE (irel
[1].r_info
) == R_ALPHA_LITUSE
)
3929 if (!elf64_alpha_relax_with_lituse (&info
, symval
, irel
))
3934 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3939 case R_ALPHA_GOTDTPREL
:
3940 case R_ALPHA_GOTTPREL
:
3941 BFD_ASSERT(info
.gotent
!= NULL
);
3942 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3947 case R_ALPHA_TLSLDM
:
3948 BFD_ASSERT(info
.gotent
!= NULL
);
3949 if (!elf64_alpha_relax_tls_get_addr (&info
, symval
, irel
,
3950 r_type
== R_ALPHA_TLSGD
))
3957 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
3959 if (!link_info
->keep_memory
)
3963 /* Cache the symbols for elf_link_input_bfd. */
3964 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
3968 if (info
.contents
!= NULL
3969 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
3971 if (!info
.changed_contents
&& !link_info
->keep_memory
)
3972 free (info
.contents
);
3975 /* Cache the section contents for elf_link_input_bfd. */
3976 elf_section_data (sec
)->this_hdr
.contents
= info
.contents
;
3980 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3982 if (!info
.changed_relocs
)
3983 free (internal_relocs
);
3985 elf_section_data (sec
)->relocs
= internal_relocs
;
3988 *again
= info
.changed_contents
|| info
.changed_relocs
;
3993 if (symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
3995 if (elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
3996 free (info
.contents
);
3997 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3998 free (internal_relocs
);
4002 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4003 into the next available slot in SREL. */
4006 elf64_alpha_emit_dynrel (bfd
*abfd
, struct bfd_link_info
*info
,
4007 asection
*sec
, asection
*srel
, bfd_vma offset
,
4008 long dynindx
, long rtype
, bfd_vma addend
)
4010 Elf_Internal_Rela outrel
;
4013 BFD_ASSERT (srel
!= NULL
);
4015 outrel
.r_info
= ELF64_R_INFO (dynindx
, rtype
);
4016 outrel
.r_addend
= addend
;
4018 offset
= _bfd_elf_section_offset (abfd
, info
, sec
, offset
);
4019 if ((offset
| 1) != (bfd_vma
) -1)
4020 outrel
.r_offset
= sec
->output_section
->vma
+ sec
->output_offset
+ offset
;
4022 memset (&outrel
, 0, sizeof (outrel
));
4024 loc
= srel
->contents
;
4025 loc
+= srel
->reloc_count
++ * sizeof (Elf64_External_Rela
);
4026 bfd_elf64_swap_reloca_out (abfd
, &outrel
, loc
);
4027 BFD_ASSERT (sizeof (Elf64_External_Rela
) * srel
->reloc_count
<= srel
->size
);
4030 /* Relocate an Alpha ELF section for a relocatable link.
4032 We don't have to change anything unless the reloc is against a section
4033 symbol, in which case we have to adjust according to where the section
4034 symbol winds up in the output section. */
4037 elf64_alpha_relocate_section_r (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4038 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4039 bfd
*input_bfd
, asection
*input_section
,
4040 bfd_byte
*contents ATTRIBUTE_UNUSED
,
4041 Elf_Internal_Rela
*relocs
,
4042 Elf_Internal_Sym
*local_syms
,
4043 asection
**local_sections
)
4045 unsigned long symtab_hdr_sh_info
;
4046 Elf_Internal_Rela
*rel
;
4047 Elf_Internal_Rela
*relend
;
4048 struct elf_link_hash_entry
**sym_hashes
;
4049 bfd_boolean ret_val
= TRUE
;
4051 symtab_hdr_sh_info
= elf_symtab_hdr (input_bfd
).sh_info
;
4052 sym_hashes
= elf_sym_hashes (input_bfd
);
4054 relend
= relocs
+ input_section
->reloc_count
;
4055 for (rel
= relocs
; rel
< relend
; rel
++)
4057 unsigned long r_symndx
;
4058 Elf_Internal_Sym
*sym
;
4060 unsigned long r_type
;
4062 r_type
= ELF64_R_TYPE (rel
->r_info
);
4063 if (r_type
>= R_ALPHA_max
)
4066 /* xgettext:c-format */
4067 (_("%pB: unsupported relocation type %#x"),
4068 input_bfd
, (int) r_type
);
4069 bfd_set_error (bfd_error_bad_value
);
4074 /* The symbol associated with GPDISP and LITUSE is
4075 immaterial. Only the addend is significant. */
4076 if (r_type
== R_ALPHA_GPDISP
|| r_type
== R_ALPHA_LITUSE
)
4079 r_symndx
= ELF64_R_SYM (rel
->r_info
);
4080 if (r_symndx
< symtab_hdr_sh_info
)
4082 sym
= local_syms
+ r_symndx
;
4083 sec
= local_sections
[r_symndx
];
4087 struct elf_link_hash_entry
*h
;
4089 h
= sym_hashes
[r_symndx
- symtab_hdr_sh_info
];
4091 while (h
->root
.type
== bfd_link_hash_indirect
4092 || h
->root
.type
== bfd_link_hash_warning
)
4093 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4095 if (h
->root
.type
!= bfd_link_hash_defined
4096 && h
->root
.type
!= bfd_link_hash_defweak
)
4100 sec
= h
->root
.u
.def
.section
;
4103 if (sec
!= NULL
&& discarded_section (sec
))
4104 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4106 elf64_alpha_howto_table
+ r_type
, 0,
4109 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
4110 rel
->r_addend
+= sec
->output_offset
;
4116 /* Relocate an Alpha ELF section. */
4119 elf64_alpha_relocate_section (bfd
*output_bfd
, struct bfd_link_info
*info
,
4120 bfd
*input_bfd
, asection
*input_section
,
4121 bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
4122 Elf_Internal_Sym
*local_syms
,
4123 asection
**local_sections
)
4125 Elf_Internal_Shdr
*symtab_hdr
;
4126 Elf_Internal_Rela
*rel
;
4127 Elf_Internal_Rela
*relend
;
4128 asection
*sgot
, *srel
, *srelgot
;
4129 bfd
*dynobj
, *gotobj
;
4130 bfd_vma gp
, tp_base
, dtp_base
;
4131 struct alpha_elf_got_entry
**local_got_entries
;
4132 bfd_boolean ret_val
;
4134 BFD_ASSERT (is_alpha_elf (input_bfd
));
4136 /* Handle relocatable links with a smaller loop. */
4137 if (bfd_link_relocatable (info
))
4138 return elf64_alpha_relocate_section_r (output_bfd
, info
, input_bfd
,
4139 input_section
, contents
, relocs
,
4140 local_syms
, local_sections
);
4142 /* This is a final link. */
4146 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4148 dynobj
= elf_hash_table (info
)->dynobj
;
4149 srelgot
= elf_hash_table (info
)->srelgot
;
4151 if (input_section
->flags
& SEC_ALLOC
)
4153 const char *section_name
;
4154 section_name
= (bfd_elf_string_from_elf_section
4155 (input_bfd
, elf_elfheader(input_bfd
)->e_shstrndx
,
4156 _bfd_elf_single_rel_hdr (input_section
)->sh_name
));
4157 BFD_ASSERT(section_name
!= NULL
);
4158 srel
= bfd_get_linker_section (dynobj
, section_name
);
4163 /* Find the gp value for this input bfd. */
4164 gotobj
= alpha_elf_tdata (input_bfd
)->gotobj
;
4167 sgot
= alpha_elf_tdata (gotobj
)->got
;
4168 gp
= _bfd_get_gp_value (gotobj
);
4171 gp
= (sgot
->output_section
->vma
4172 + sgot
->output_offset
4174 _bfd_set_gp_value (gotobj
, gp
);
4183 local_got_entries
= alpha_elf_tdata(input_bfd
)->local_got_entries
;
4185 if (elf_hash_table (info
)->tls_sec
!= NULL
)
4187 dtp_base
= alpha_get_dtprel_base (info
);
4188 tp_base
= alpha_get_tprel_base (info
);
4191 dtp_base
= tp_base
= 0;
4193 relend
= relocs
+ input_section
->reloc_count
;
4194 for (rel
= relocs
; rel
< relend
; rel
++)
4196 struct alpha_elf_link_hash_entry
*h
= NULL
;
4197 struct alpha_elf_got_entry
*gotent
;
4198 bfd_reloc_status_type r
;
4199 reloc_howto_type
*howto
;
4200 unsigned long r_symndx
;
4201 Elf_Internal_Sym
*sym
= NULL
;
4202 asection
*sec
= NULL
;
4205 bfd_boolean dynamic_symbol_p
;
4206 bfd_boolean unresolved_reloc
= FALSE
;
4207 bfd_boolean undef_weak_ref
= FALSE
;
4208 unsigned long r_type
;
4210 r_type
= ELF64_R_TYPE(rel
->r_info
);
4211 if (r_type
>= R_ALPHA_max
)
4214 /* xgettext:c-format */
4215 (_("%pB: unsupported relocation type %#x"),
4216 input_bfd
, (int) r_type
);
4217 bfd_set_error (bfd_error_bad_value
);
4222 howto
= elf64_alpha_howto_table
+ r_type
;
4223 r_symndx
= ELF64_R_SYM(rel
->r_info
);
4225 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4226 reloc to the STN_UNDEF (0) symbol so that they all match. */
4227 if (r_type
== R_ALPHA_TLSLDM
)
4228 r_symndx
= STN_UNDEF
;
4230 if (r_symndx
< symtab_hdr
->sh_info
)
4233 sym
= local_syms
+ r_symndx
;
4234 sec
= local_sections
[r_symndx
];
4236 value
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &msec
, rel
);
4238 /* If this is a tp-relative relocation against sym STN_UNDEF (0),
4239 this is hackery from relax_section. Force the value to
4240 be the tls module base. */
4241 if (r_symndx
== STN_UNDEF
4242 && (r_type
== R_ALPHA_TLSLDM
4243 || r_type
== R_ALPHA_GOTTPREL
4244 || r_type
== R_ALPHA_TPREL64
4245 || r_type
== R_ALPHA_TPRELHI
4246 || r_type
== R_ALPHA_TPRELLO
4247 || r_type
== R_ALPHA_TPREL16
))
4250 if (local_got_entries
)
4251 gotent
= local_got_entries
[r_symndx
];
4255 /* Need to adjust local GOT entries' addends for SEC_MERGE
4256 unless it has been done already. */
4257 if ((sec
->flags
& SEC_MERGE
)
4258 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
4259 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
4261 && !gotent
->reloc_xlated
)
4263 struct alpha_elf_got_entry
*ent
;
4265 for (ent
= gotent
; ent
; ent
= ent
->next
)
4267 ent
->reloc_xlated
= 1;
4268 if (ent
->use_count
== 0)
4272 _bfd_merged_section_offset (output_bfd
, &msec
,
4273 elf_section_data (sec
)->
4275 sym
->st_value
+ ent
->addend
);
4276 ent
->addend
-= sym
->st_value
;
4277 ent
->addend
+= msec
->output_section
->vma
4278 + msec
->output_offset
4279 - sec
->output_section
->vma
4280 - sec
->output_offset
;
4284 dynamic_symbol_p
= FALSE
;
4288 bfd_boolean warned
, ignored
;
4289 struct elf_link_hash_entry
*hh
;
4290 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
4292 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4293 r_symndx
, symtab_hdr
, sym_hashes
,
4295 unresolved_reloc
, warned
, ignored
);
4301 && ! unresolved_reloc
4302 && hh
->root
.type
== bfd_link_hash_undefweak
)
4303 undef_weak_ref
= TRUE
;
4305 h
= (struct alpha_elf_link_hash_entry
*) hh
;
4306 dynamic_symbol_p
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
4307 gotent
= h
->got_entries
;
4310 if (sec
!= NULL
&& discarded_section (sec
))
4311 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4312 rel
, 1, relend
, howto
, 0, contents
);
4314 addend
= rel
->r_addend
;
4317 /* Search for the proper got entry. */
4318 for (; gotent
; gotent
= gotent
->next
)
4319 if (gotent
->gotobj
== gotobj
4320 && gotent
->reloc_type
== r_type
4321 && gotent
->addend
== addend
)
4326 case R_ALPHA_GPDISP
:
4328 bfd_byte
*p_ldah
, *p_lda
;
4330 BFD_ASSERT(gp
!= 0);
4332 value
= (input_section
->output_section
->vma
4333 + input_section
->output_offset
4336 p_ldah
= contents
+ rel
->r_offset
;
4337 p_lda
= p_ldah
+ rel
->r_addend
;
4339 r
= elf64_alpha_do_reloc_gpdisp (input_bfd
, gp
- value
,
4344 case R_ALPHA_LITERAL
:
4345 BFD_ASSERT(sgot
!= NULL
);
4346 BFD_ASSERT(gp
!= 0);
4347 BFD_ASSERT(gotent
!= NULL
);
4348 BFD_ASSERT(gotent
->use_count
>= 1);
4350 if (!gotent
->reloc_done
)
4352 gotent
->reloc_done
= 1;
4354 bfd_put_64 (output_bfd
, value
,
4355 sgot
->contents
+ gotent
->got_offset
);
4357 /* If the symbol has been forced local, output a
4358 RELATIVE reloc, otherwise it will be handled in
4359 finish_dynamic_symbol. */
4360 if (bfd_link_pic (info
)
4361 && !dynamic_symbol_p
4363 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4364 gotent
->got_offset
, 0,
4365 R_ALPHA_RELATIVE
, value
);
4368 value
= (sgot
->output_section
->vma
4369 + sgot
->output_offset
4370 + gotent
->got_offset
);
4374 case R_ALPHA_GPREL32
:
4375 case R_ALPHA_GPREL16
:
4376 case R_ALPHA_GPRELLOW
:
4377 if (dynamic_symbol_p
)
4380 /* xgettext:c-format */
4381 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4382 input_bfd
, h
->root
.root
.root
.string
);
4385 BFD_ASSERT(gp
!= 0);
4389 case R_ALPHA_GPRELHIGH
:
4390 if (dynamic_symbol_p
)
4393 /* xgettext:c-format */
4394 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4395 input_bfd
, h
->root
.root
.root
.string
);
4398 BFD_ASSERT(gp
!= 0);
4400 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4404 /* A call to a dynamic symbol is definitely out of range of
4405 the 16-bit displacement. Don't bother writing anything. */
4406 if (dynamic_symbol_p
)
4411 /* The regular PC-relative stuff measures from the start of
4412 the instruction rather than the end. */
4416 case R_ALPHA_BRADDR
:
4417 if (dynamic_symbol_p
)
4420 /* xgettext:c-format */
4421 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4422 input_bfd
, h
->root
.root
.root
.string
);
4425 /* The regular PC-relative stuff measures from the start of
4426 the instruction rather than the end. */
4435 /* The regular PC-relative stuff measures from the start of
4436 the instruction rather than the end. */
4439 /* The source and destination gp must be the same. Note that
4440 the source will always have an assigned gp, since we forced
4441 one in check_relocs, but that the destination may not, as
4442 it might not have had any relocations at all. Also take
4443 care not to crash if H is an undefined symbol. */
4444 if (h
!= NULL
&& sec
!= NULL
4445 && alpha_elf_tdata (sec
->owner
)->gotobj
4446 && gotobj
!= alpha_elf_tdata (sec
->owner
)->gotobj
)
4449 /* xgettext:c-format */
4450 (_("%pB: change in gp: BRSGP %s"),
4451 input_bfd
, h
->root
.root
.root
.string
);
4455 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4457 other
= h
->root
.other
;
4459 other
= sym
->st_other
;
4460 switch (other
& STO_ALPHA_STD_GPLOAD
)
4462 case STO_ALPHA_NOPV
:
4464 case STO_ALPHA_STD_GPLOAD
:
4469 name
= h
->root
.root
.root
.string
;
4472 name
= (bfd_elf_string_from_elf_section
4473 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4475 name
= _("<unknown>");
4476 else if (name
[0] == 0)
4477 name
= bfd_section_name (sec
);
4480 /* xgettext:c-format */
4481 (_("%pB: !samegp reloc against symbol without .prologue: %s"),
4490 case R_ALPHA_REFLONG
:
4491 case R_ALPHA_REFQUAD
:
4492 case R_ALPHA_DTPREL64
:
4493 case R_ALPHA_TPREL64
:
4495 long dynindx
, dyntype
= r_type
;
4498 /* Careful here to remember RELATIVE relocations for global
4499 variables for symbolic shared objects. */
4501 if (dynamic_symbol_p
)
4503 BFD_ASSERT(h
->root
.dynindx
!= -1);
4504 dynindx
= h
->root
.dynindx
;
4506 addend
= 0, value
= 0;
4508 else if (r_type
== R_ALPHA_DTPREL64
)
4510 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4514 else if (r_type
== R_ALPHA_TPREL64
)
4516 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4517 if (!bfd_link_dll (info
))
4523 dynaddend
= value
- dtp_base
;
4525 else if (bfd_link_pic (info
)
4526 && r_symndx
!= STN_UNDEF
4527 && (input_section
->flags
& SEC_ALLOC
)
4529 && !(unresolved_reloc
4530 && (_bfd_elf_section_offset (output_bfd
, info
,
4535 if (r_type
== R_ALPHA_REFLONG
)
4538 /* xgettext:c-format */
4539 (_("%pB: unhandled dynamic relocation against %s"),
4541 h
->root
.root
.root
.string
);
4545 dyntype
= R_ALPHA_RELATIVE
;
4551 if (input_section
->flags
& SEC_ALLOC
)
4552 elf64_alpha_emit_dynrel (output_bfd
, info
, input_section
,
4553 srel
, rel
->r_offset
, dynindx
,
4554 dyntype
, dynaddend
);
4558 case R_ALPHA_SREL16
:
4559 case R_ALPHA_SREL32
:
4560 case R_ALPHA_SREL64
:
4561 if (dynamic_symbol_p
)
4564 /* xgettext:c-format */
4565 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4566 input_bfd
, h
->root
.root
.root
.string
);
4569 else if (bfd_link_pic (info
)
4573 /* xgettext:c-format */
4574 (_("%pB: pc-relative relocation against undefined weak symbol %s"),
4575 input_bfd
, h
->root
.root
.root
.string
);
4580 /* ??? .eh_frame references to discarded sections will be smashed
4581 to relocations against SHN_UNDEF. The .eh_frame format allows
4582 NULL to be encoded as 0 in any format, so this works here. */
4583 if (r_symndx
== STN_UNDEF
4584 || (unresolved_reloc
4585 && _bfd_elf_section_offset (output_bfd
, info
,
4587 rel
->r_offset
) == (bfd_vma
) -1))
4588 howto
= (elf64_alpha_howto_table
4589 + (r_type
- R_ALPHA_SREL32
+ R_ALPHA_REFLONG
));
4592 case R_ALPHA_TLSLDM
:
4593 /* Ignore the symbol for the relocation. The result is always
4594 the current module. */
4595 dynamic_symbol_p
= 0;
4599 if (!gotent
->reloc_done
)
4601 gotent
->reloc_done
= 1;
4603 /* Note that the module index for the main program is 1. */
4604 bfd_put_64 (output_bfd
,
4605 !bfd_link_pic (info
) && !dynamic_symbol_p
,
4606 sgot
->contents
+ gotent
->got_offset
);
4608 /* If the symbol has been forced local, output a
4609 DTPMOD64 reloc, otherwise it will be handled in
4610 finish_dynamic_symbol. */
4611 if (bfd_link_pic (info
) && !dynamic_symbol_p
)
4612 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4613 gotent
->got_offset
, 0,
4614 R_ALPHA_DTPMOD64
, 0);
4616 if (dynamic_symbol_p
|| r_type
== R_ALPHA_TLSLDM
)
4620 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4623 bfd_put_64 (output_bfd
, value
,
4624 sgot
->contents
+ gotent
->got_offset
+ 8);
4627 value
= (sgot
->output_section
->vma
4628 + sgot
->output_offset
4629 + gotent
->got_offset
);
4633 case R_ALPHA_DTPRELHI
:
4634 case R_ALPHA_DTPRELLO
:
4635 case R_ALPHA_DTPREL16
:
4636 if (dynamic_symbol_p
)
4639 /* xgettext:c-format */
4640 (_("%pB: dtp-relative relocation against dynamic symbol %s"),
4641 input_bfd
, h
->root
.root
.root
.string
);
4644 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4646 if (r_type
== R_ALPHA_DTPRELHI
)
4647 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4650 case R_ALPHA_TPRELHI
:
4651 case R_ALPHA_TPRELLO
:
4652 case R_ALPHA_TPREL16
:
4653 if (bfd_link_dll (info
))
4656 /* xgettext:c-format */
4657 (_("%pB: TLS local exec code cannot be linked into shared objects"),
4661 else if (dynamic_symbol_p
)
4664 /* xgettext:c-format */
4665 (_("%pB: tp-relative relocation against dynamic symbol %s"),
4666 input_bfd
, h
->root
.root
.root
.string
);
4669 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4671 if (r_type
== R_ALPHA_TPRELHI
)
4672 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4675 case R_ALPHA_GOTDTPREL
:
4676 case R_ALPHA_GOTTPREL
:
4677 BFD_ASSERT(sgot
!= NULL
);
4678 BFD_ASSERT(gp
!= 0);
4679 BFD_ASSERT(gotent
!= NULL
);
4680 BFD_ASSERT(gotent
->use_count
>= 1);
4682 if (!gotent
->reloc_done
)
4684 gotent
->reloc_done
= 1;
4686 if (dynamic_symbol_p
)
4690 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4691 if (r_type
== R_ALPHA_GOTDTPREL
)
4693 else if (bfd_link_executable (info
))
4697 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4698 gotent
->got_offset
, 0,
4704 bfd_put_64 (output_bfd
, value
,
4705 sgot
->contents
+ gotent
->got_offset
);
4708 value
= (sgot
->output_section
->vma
4709 + sgot
->output_offset
4710 + gotent
->got_offset
);
4716 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4717 contents
, rel
->r_offset
, value
, 0);
4726 case bfd_reloc_overflow
:
4730 /* Don't warn if the overflow is due to pc relative reloc
4731 against discarded section. Section optimization code should
4734 if (r_symndx
< symtab_hdr
->sh_info
4735 && sec
!= NULL
&& howto
->pc_relative
4736 && discarded_section (sec
))
4743 name
= (bfd_elf_string_from_elf_section
4744 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4748 name
= bfd_section_name (sec
);
4750 (*info
->callbacks
->reloc_overflow
)
4751 (info
, (h
? &h
->root
.root
: NULL
), name
, howto
->name
,
4752 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4757 case bfd_reloc_outofrange
:
4765 /* Finish up dynamic symbol handling. We set the contents of various
4766 dynamic sections here. */
4769 elf64_alpha_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
4770 struct elf_link_hash_entry
*h
,
4771 Elf_Internal_Sym
*sym
)
4773 struct alpha_elf_link_hash_entry
*ah
= (struct alpha_elf_link_hash_entry
*)h
;
4777 /* Fill in the .plt entry for this symbol. */
4778 asection
*splt
, *sgot
, *srel
;
4779 Elf_Internal_Rela outrel
;
4781 bfd_vma got_addr
, plt_addr
;
4783 struct alpha_elf_got_entry
*gotent
;
4785 BFD_ASSERT (h
->dynindx
!= -1);
4787 splt
= elf_hash_table (info
)->splt
;
4788 BFD_ASSERT (splt
!= NULL
);
4789 srel
= elf_hash_table (info
)->srelplt
;
4790 BFD_ASSERT (srel
!= NULL
);
4792 for (gotent
= ah
->got_entries
; gotent
; gotent
= gotent
->next
)
4793 if (gotent
->reloc_type
== R_ALPHA_LITERAL
4794 && gotent
->use_count
> 0)
4799 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4800 BFD_ASSERT (sgot
!= NULL
);
4802 BFD_ASSERT (gotent
->got_offset
!= -1);
4803 BFD_ASSERT (gotent
->plt_offset
!= -1);
4805 got_addr
= (sgot
->output_section
->vma
4806 + sgot
->output_offset
4807 + gotent
->got_offset
);
4808 plt_addr
= (splt
->output_section
->vma
4809 + splt
->output_offset
4810 + gotent
->plt_offset
);
4812 plt_index
= (gotent
->plt_offset
-PLT_HEADER_SIZE
) / PLT_ENTRY_SIZE
;
4814 /* Fill in the entry in the procedure linkage table. */
4815 if (elf64_alpha_use_secureplt
)
4817 disp
= (PLT_HEADER_SIZE
- 4) - (gotent
->plt_offset
+ 4);
4818 insn
= INSN_AD (INSN_BR
, 31, disp
);
4819 bfd_put_32 (output_bfd
, insn
,
4820 splt
->contents
+ gotent
->plt_offset
);
4822 plt_index
= ((gotent
->plt_offset
- NEW_PLT_HEADER_SIZE
)
4823 / NEW_PLT_ENTRY_SIZE
);
4827 disp
= -(gotent
->plt_offset
+ 4);
4828 insn
= INSN_AD (INSN_BR
, 28, disp
);
4829 bfd_put_32 (output_bfd
, insn
,
4830 splt
->contents
+ gotent
->plt_offset
);
4831 bfd_put_32 (output_bfd
, INSN_UNOP
,
4832 splt
->contents
+ gotent
->plt_offset
+ 4);
4833 bfd_put_32 (output_bfd
, INSN_UNOP
,
4834 splt
->contents
+ gotent
->plt_offset
+ 8);
4836 plt_index
= ((gotent
->plt_offset
- OLD_PLT_HEADER_SIZE
)
4837 / OLD_PLT_ENTRY_SIZE
);
4840 /* Fill in the entry in the .rela.plt section. */
4841 outrel
.r_offset
= got_addr
;
4842 outrel
.r_info
= ELF64_R_INFO(h
->dynindx
, R_ALPHA_JMP_SLOT
);
4843 outrel
.r_addend
= 0;
4845 loc
= srel
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
4846 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
4848 /* Fill in the entry in the .got. */
4849 bfd_put_64 (output_bfd
, plt_addr
,
4850 sgot
->contents
+ gotent
->got_offset
);
4853 else if (alpha_elf_dynamic_symbol_p (h
, info
))
4855 /* Fill in the dynamic relocations for this symbol's .got entries. */
4857 struct alpha_elf_got_entry
*gotent
;
4859 srel
= elf_hash_table (info
)->srelgot
;
4860 BFD_ASSERT (srel
!= NULL
);
4862 for (gotent
= ((struct alpha_elf_link_hash_entry
*) h
)->got_entries
;
4864 gotent
= gotent
->next
)
4869 if (gotent
->use_count
== 0)
4872 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4874 r_type
= gotent
->reloc_type
;
4877 case R_ALPHA_LITERAL
:
4878 r_type
= R_ALPHA_GLOB_DAT
;
4881 r_type
= R_ALPHA_DTPMOD64
;
4883 case R_ALPHA_GOTDTPREL
:
4884 r_type
= R_ALPHA_DTPREL64
;
4886 case R_ALPHA_GOTTPREL
:
4887 r_type
= R_ALPHA_TPREL64
;
4889 case R_ALPHA_TLSLDM
:
4894 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4895 gotent
->got_offset
, h
->dynindx
,
4896 r_type
, gotent
->addend
);
4898 if (gotent
->reloc_type
== R_ALPHA_TLSGD
)
4899 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4900 gotent
->got_offset
+ 8, h
->dynindx
,
4901 R_ALPHA_DTPREL64
, gotent
->addend
);
4905 /* Mark some specially defined symbols as absolute. */
4906 if (h
== elf_hash_table (info
)->hdynamic
4907 || h
== elf_hash_table (info
)->hgot
4908 || h
== elf_hash_table (info
)->hplt
)
4909 sym
->st_shndx
= SHN_ABS
;
4914 /* Finish up the dynamic sections. */
4917 elf64_alpha_finish_dynamic_sections (bfd
*output_bfd
,
4918 struct bfd_link_info
*info
)
4923 dynobj
= elf_hash_table (info
)->dynobj
;
4924 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4926 if (elf_hash_table (info
)->dynamic_sections_created
)
4928 asection
*splt
, *sgotplt
, *srelaplt
;
4929 Elf64_External_Dyn
*dyncon
, *dynconend
;
4930 bfd_vma plt_vma
, gotplt_vma
;
4932 splt
= elf_hash_table (info
)->splt
;
4933 srelaplt
= elf_hash_table (info
)->srelplt
;
4934 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
4936 plt_vma
= splt
->output_section
->vma
+ splt
->output_offset
;
4939 if (elf64_alpha_use_secureplt
)
4941 sgotplt
= elf_hash_table (info
)->sgotplt
;
4942 BFD_ASSERT (sgotplt
!= NULL
);
4943 if (sgotplt
->size
> 0)
4944 gotplt_vma
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
4947 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
4948 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4949 for (; dyncon
< dynconend
; dyncon
++)
4951 Elf_Internal_Dyn dyn
;
4953 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4959 = elf64_alpha_use_secureplt
? gotplt_vma
: plt_vma
;
4962 dyn
.d_un
.d_val
= srelaplt
? srelaplt
->size
: 0;
4965 dyn
.d_un
.d_ptr
= srelaplt
? (srelaplt
->output_section
->vma
4966 + srelaplt
->output_offset
) : 0;
4970 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4973 /* Initialize the plt header. */
4979 if (elf64_alpha_use_secureplt
)
4981 ofs
= gotplt_vma
- (plt_vma
+ PLT_HEADER_SIZE
);
4983 insn
= INSN_ABC (INSN_SUBQ
, 27, 28, 25);
4984 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
4986 insn
= INSN_ABO (INSN_LDAH
, 28, 28, (ofs
+ 0x8000) >> 16);
4987 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
4989 insn
= INSN_ABC (INSN_S4SUBQ
, 25, 25, 25);
4990 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
4992 insn
= INSN_ABO (INSN_LDA
, 28, 28, ofs
);
4993 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
4995 insn
= INSN_ABO (INSN_LDQ
, 27, 28, 0);
4996 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 16);
4998 insn
= INSN_ABC (INSN_ADDQ
, 25, 25, 25);
4999 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 20);
5001 insn
= INSN_ABO (INSN_LDQ
, 28, 28, 8);
5002 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 24);
5004 insn
= INSN_AB (INSN_JMP
, 31, 27);
5005 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 28);
5007 insn
= INSN_AD (INSN_BR
, 28, -PLT_HEADER_SIZE
);
5008 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 32);
5012 insn
= INSN_AD (INSN_BR
, 27, 0); /* br $27, .+4 */
5013 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5015 insn
= INSN_ABO (INSN_LDQ
, 27, 27, 12);
5016 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5019 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5021 insn
= INSN_AB (INSN_JMP
, 27, 27);
5022 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5024 /* The next two words will be filled in by ld.so. */
5025 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 16);
5026 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 24);
5029 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 0;
5036 /* We need to use a special link routine to handle the .mdebug section.
5037 We need to merge all instances of these sections together, not write
5038 them all out sequentially. */
5041 elf64_alpha_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5044 struct bfd_link_order
*p
;
5045 asection
*mdebug_sec
;
5046 struct ecoff_debug_info debug
;
5047 const struct ecoff_debug_swap
*swap
5048 = get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
5049 HDRR
*symhdr
= &debug
.symbolic_header
;
5050 void * mdebug_handle
= NULL
;
5051 struct alpha_elf_link_hash_table
* htab
;
5053 htab
= alpha_elf_hash_table (info
);
5057 /* Go through the sections and collect the mdebug information. */
5059 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
5061 if (strcmp (o
->name
, ".mdebug") == 0)
5063 struct extsym_info einfo
;
5065 /* We have found the .mdebug section in the output file.
5066 Look through all the link_orders comprising it and merge
5067 the information together. */
5068 symhdr
->magic
= swap
->sym_magic
;
5069 /* FIXME: What should the version stamp be? */
5071 symhdr
->ilineMax
= 0;
5075 symhdr
->isymMax
= 0;
5076 symhdr
->ioptMax
= 0;
5077 symhdr
->iauxMax
= 0;
5079 symhdr
->issExtMax
= 0;
5082 symhdr
->iextMax
= 0;
5084 /* We accumulate the debugging information itself in the
5085 debug_info structure. */
5087 debug
.external_dnr
= NULL
;
5088 debug
.external_pdr
= NULL
;
5089 debug
.external_sym
= NULL
;
5090 debug
.external_opt
= NULL
;
5091 debug
.external_aux
= NULL
;
5093 debug
.ssext
= debug
.ssext_end
= NULL
;
5094 debug
.external_fdr
= NULL
;
5095 debug
.external_rfd
= NULL
;
5096 debug
.external_ext
= debug
.external_ext_end
= NULL
;
5098 mdebug_handle
= bfd_ecoff_debug_init (abfd
, &debug
, swap
, info
);
5099 if (mdebug_handle
== NULL
)
5108 static const char * const name
[] =
5110 ".text", ".init", ".fini", ".data",
5111 ".rodata", ".sdata", ".sbss", ".bss"
5113 static const int sc
[] = { scText
, scInit
, scFini
, scData
,
5114 scRData
, scSData
, scSBss
, scBss
};
5117 esym
.cobol_main
= 0;
5121 esym
.asym
.iss
= issNil
;
5122 esym
.asym
.st
= stLocal
;
5123 esym
.asym
.reserved
= 0;
5124 esym
.asym
.index
= indexNil
;
5125 for (i
= 0; i
< 8; i
++)
5127 esym
.asym
.sc
= sc
[i
];
5128 s
= bfd_get_section_by_name (abfd
, name
[i
]);
5131 esym
.asym
.value
= s
->vma
;
5132 last
= s
->vma
+ s
->size
;
5135 esym
.asym
.value
= last
;
5137 if (! bfd_ecoff_debug_one_external (abfd
, &debug
, swap
,
5143 for (p
= o
->map_head
.link_order
;
5144 p
!= (struct bfd_link_order
*) NULL
;
5147 asection
*input_section
;
5149 const struct ecoff_debug_swap
*input_swap
;
5150 struct ecoff_debug_info input_debug
;
5154 if (p
->type
!= bfd_indirect_link_order
)
5156 if (p
->type
== bfd_data_link_order
)
5161 input_section
= p
->u
.indirect
.section
;
5162 input_bfd
= input_section
->owner
;
5164 if (! is_alpha_elf (input_bfd
))
5165 /* I don't know what a non ALPHA ELF bfd would be
5166 doing with a .mdebug section, but I don't really
5167 want to deal with it. */
5170 input_swap
= (get_elf_backend_data (input_bfd
)
5171 ->elf_backend_ecoff_debug_swap
);
5173 BFD_ASSERT (p
->size
== input_section
->size
);
5175 /* The ECOFF linking code expects that we have already
5176 read in the debugging information and set up an
5177 ecoff_debug_info structure, so we do that now. */
5178 if (!elf64_alpha_read_ecoff_info (input_bfd
, input_section
,
5182 if (! (bfd_ecoff_debug_accumulate
5183 (mdebug_handle
, abfd
, &debug
, swap
, input_bfd
,
5184 &input_debug
, input_swap
, info
)))
5187 /* Loop through the external symbols. For each one with
5188 interesting information, try to find the symbol in
5189 the linker global hash table and save the information
5190 for the output external symbols. */
5191 eraw_src
= (char *) input_debug
.external_ext
;
5192 eraw_end
= (eraw_src
5193 + (input_debug
.symbolic_header
.iextMax
5194 * input_swap
->external_ext_size
));
5196 eraw_src
< eraw_end
;
5197 eraw_src
+= input_swap
->external_ext_size
)
5201 struct alpha_elf_link_hash_entry
*h
;
5203 (*input_swap
->swap_ext_in
) (input_bfd
, eraw_src
, &ext
);
5204 if (ext
.asym
.sc
== scNil
5205 || ext
.asym
.sc
== scUndefined
5206 || ext
.asym
.sc
== scSUndefined
)
5209 name
= input_debug
.ssext
+ ext
.asym
.iss
;
5210 h
= alpha_elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
5211 if (h
== NULL
|| h
->esym
.ifd
!= -2)
5217 < input_debug
.symbolic_header
.ifdMax
);
5218 ext
.ifd
= input_debug
.ifdmap
[ext
.ifd
];
5224 /* Free up the information we just read. */
5225 free (input_debug
.line
);
5226 free (input_debug
.external_dnr
);
5227 free (input_debug
.external_pdr
);
5228 free (input_debug
.external_sym
);
5229 free (input_debug
.external_opt
);
5230 free (input_debug
.external_aux
);
5231 free (input_debug
.ss
);
5232 free (input_debug
.ssext
);
5233 free (input_debug
.external_fdr
);
5234 free (input_debug
.external_rfd
);
5235 free (input_debug
.external_ext
);
5237 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5238 elf_link_input_bfd ignores this section. */
5239 input_section
->flags
&=~ SEC_HAS_CONTENTS
;
5242 /* Build the external symbol information. */
5245 einfo
.debug
= &debug
;
5247 einfo
.failed
= FALSE
;
5248 elf_link_hash_traverse (elf_hash_table (info
),
5249 elf64_alpha_output_extsym
,
5254 /* Set the size of the .mdebug section. */
5255 o
->size
= bfd_ecoff_debug_size (abfd
, &debug
, swap
);
5257 /* Skip this section later on (I don't think this currently
5258 matters, but someday it might). */
5259 o
->map_head
.link_order
= (struct bfd_link_order
*) NULL
;
5265 /* Invoke the regular ELF backend linker to do all the work. */
5266 if (! bfd_elf_final_link (abfd
, info
))
5269 /* Now write out the computed sections. */
5271 /* The .got subsections... */
5273 bfd
*i
, *dynobj
= elf_hash_table(info
)->dynobj
;
5274 for (i
= htab
->got_list
;
5276 i
= alpha_elf_tdata(i
)->got_link_next
)
5280 /* elf_bfd_final_link already did everything in dynobj. */
5284 sgot
= alpha_elf_tdata(i
)->got
;
5285 if (! bfd_set_section_contents (abfd
, sgot
->output_section
,
5287 (file_ptr
) sgot
->output_offset
,
5293 if (mdebug_sec
!= (asection
*) NULL
)
5295 BFD_ASSERT (abfd
->output_has_begun
);
5296 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle
, abfd
, &debug
,
5298 mdebug_sec
->filepos
))
5301 bfd_ecoff_debug_free (mdebug_handle
, abfd
, &debug
, swap
, info
);
5307 static enum elf_reloc_type_class
5308 elf64_alpha_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5309 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5310 const Elf_Internal_Rela
*rela
)
5312 switch ((int) ELF64_R_TYPE (rela
->r_info
))
5314 case R_ALPHA_RELATIVE
:
5315 return reloc_class_relative
;
5316 case R_ALPHA_JMP_SLOT
:
5317 return reloc_class_plt
;
5319 return reloc_class_copy
;
5321 return reloc_class_normal
;
5325 static const struct bfd_elf_special_section elf64_alpha_special_sections
[] =
5327 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5328 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5329 { NULL
, 0, 0, 0, 0 }
5332 /* ECOFF swapping routines. These are used when dealing with the
5333 .mdebug section, which is in the ECOFF debugging format. Copied
5334 from elf32-mips.c. */
5335 static const struct ecoff_debug_swap
5336 elf64_alpha_ecoff_debug_swap
=
5338 /* Symbol table magic number. */
5340 /* Alignment of debugging information. E.g., 4. */
5342 /* Sizes of external symbolic information. */
5343 sizeof (struct hdr_ext
),
5344 sizeof (struct dnr_ext
),
5345 sizeof (struct pdr_ext
),
5346 sizeof (struct sym_ext
),
5347 sizeof (struct opt_ext
),
5348 sizeof (struct fdr_ext
),
5349 sizeof (struct rfd_ext
),
5350 sizeof (struct ext_ext
),
5351 /* Functions to swap in external symbolic data. */
5360 _bfd_ecoff_swap_tir_in
,
5361 _bfd_ecoff_swap_rndx_in
,
5362 /* Functions to swap out external symbolic data. */
5371 _bfd_ecoff_swap_tir_out
,
5372 _bfd_ecoff_swap_rndx_out
,
5373 /* Function to read in symbolic data. */
5374 elf64_alpha_read_ecoff_info
5377 /* Use a non-standard hash bucket size of 8. */
5379 static const struct elf_size_info alpha_elf_size_info
=
5381 sizeof (Elf64_External_Ehdr
),
5382 sizeof (Elf64_External_Phdr
),
5383 sizeof (Elf64_External_Shdr
),
5384 sizeof (Elf64_External_Rel
),
5385 sizeof (Elf64_External_Rela
),
5386 sizeof (Elf64_External_Sym
),
5387 sizeof (Elf64_External_Dyn
),
5388 sizeof (Elf_External_Note
),
5392 ELFCLASS64
, EV_CURRENT
,
5393 bfd_elf64_write_out_phdrs
,
5394 bfd_elf64_write_shdrs_and_ehdr
,
5395 bfd_elf64_checksum_contents
,
5396 bfd_elf64_write_relocs
,
5397 bfd_elf64_swap_symbol_in
,
5398 bfd_elf64_swap_symbol_out
,
5399 bfd_elf64_slurp_reloc_table
,
5400 bfd_elf64_slurp_symbol_table
,
5401 bfd_elf64_swap_dyn_in
,
5402 bfd_elf64_swap_dyn_out
,
5403 bfd_elf64_swap_reloc_in
,
5404 bfd_elf64_swap_reloc_out
,
5405 bfd_elf64_swap_reloca_in
,
5406 bfd_elf64_swap_reloca_out
5409 #define TARGET_LITTLE_SYM alpha_elf64_vec
5410 #define TARGET_LITTLE_NAME "elf64-alpha"
5411 #define ELF_ARCH bfd_arch_alpha
5412 #define ELF_TARGET_ID ALPHA_ELF_DATA
5413 #define ELF_MACHINE_CODE EM_ALPHA
5414 #define ELF_MAXPAGESIZE 0x10000
5415 #define ELF_COMMONPAGESIZE 0x2000
5417 #define bfd_elf64_bfd_link_hash_table_create \
5418 elf64_alpha_bfd_link_hash_table_create
5420 #define bfd_elf64_bfd_reloc_type_lookup \
5421 elf64_alpha_bfd_reloc_type_lookup
5422 #define bfd_elf64_bfd_reloc_name_lookup \
5423 elf64_alpha_bfd_reloc_name_lookup
5424 #define elf_info_to_howto \
5425 elf64_alpha_info_to_howto
5427 #define bfd_elf64_mkobject \
5428 elf64_alpha_mkobject
5429 #define elf_backend_object_p \
5430 elf64_alpha_object_p
5432 #define elf_backend_section_from_shdr \
5433 elf64_alpha_section_from_shdr
5434 #define elf_backend_section_flags \
5435 elf64_alpha_section_flags
5436 #define elf_backend_fake_sections \
5437 elf64_alpha_fake_sections
5439 #define bfd_elf64_bfd_is_local_label_name \
5440 elf64_alpha_is_local_label_name
5441 #define bfd_elf64_find_nearest_line \
5442 elf64_alpha_find_nearest_line
5443 #define bfd_elf64_bfd_relax_section \
5444 elf64_alpha_relax_section
5446 #define elf_backend_add_symbol_hook \
5447 elf64_alpha_add_symbol_hook
5448 #define elf_backend_relocs_compatible \
5449 _bfd_elf_relocs_compatible
5450 #define elf_backend_sort_relocs_p \
5451 elf64_alpha_sort_relocs_p
5452 #define elf_backend_check_relocs \
5453 elf64_alpha_check_relocs
5454 #define elf_backend_create_dynamic_sections \
5455 elf64_alpha_create_dynamic_sections
5456 #define elf_backend_adjust_dynamic_symbol \
5457 elf64_alpha_adjust_dynamic_symbol
5458 #define elf_backend_merge_symbol_attribute \
5459 elf64_alpha_merge_symbol_attribute
5460 #define elf_backend_copy_indirect_symbol \
5461 elf64_alpha_copy_indirect_symbol
5462 #define elf_backend_always_size_sections \
5463 elf64_alpha_always_size_sections
5464 #define elf_backend_size_dynamic_sections \
5465 elf64_alpha_size_dynamic_sections
5466 #define elf_backend_omit_section_dynsym \
5467 _bfd_elf_omit_section_dynsym_all
5468 #define elf_backend_relocate_section \
5469 elf64_alpha_relocate_section
5470 #define elf_backend_finish_dynamic_symbol \
5471 elf64_alpha_finish_dynamic_symbol
5472 #define elf_backend_finish_dynamic_sections \
5473 elf64_alpha_finish_dynamic_sections
5474 #define bfd_elf64_bfd_final_link \
5475 elf64_alpha_final_link
5476 #define elf_backend_reloc_type_class \
5477 elf64_alpha_reloc_type_class
5479 #define elf_backend_can_gc_sections 1
5480 #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
5482 #define elf_backend_ecoff_debug_swap \
5483 &elf64_alpha_ecoff_debug_swap
5485 #define elf_backend_size_info \
5488 #define elf_backend_special_sections \
5489 elf64_alpha_special_sections
5491 #define elf_backend_strip_zero_sized_dynamic_sections \
5492 _bfd_elf_strip_zero_sized_dynamic_sections
5494 /* A few constants that determine how the .plt section is set up. */
5495 #define elf_backend_want_got_plt 0
5496 #define elf_backend_plt_readonly 0
5497 #define elf_backend_want_plt_sym 1
5498 #define elf_backend_got_header_size 0
5499 #define elf_backend_dtrel_excludes_plt 1
5501 #include "elf64-target.h"
5503 /* FreeBSD support. */
5505 #undef TARGET_LITTLE_SYM
5506 #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
5507 #undef TARGET_LITTLE_NAME
5508 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5510 #define ELF_OSABI ELFOSABI_FREEBSD
5512 /* The kernel recognizes executables as valid only if they carry a
5513 "FreeBSD" label in the ELF header. So we put this label on all
5514 executables and (for simplicity) also all other object files. */
5517 elf64_alpha_fbsd_init_file_header (bfd
*abfd
, struct bfd_link_info
*info
)
5519 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
5521 if (!_bfd_elf_init_file_header (abfd
, info
))
5524 i_ehdrp
= elf_elfheader (abfd
);
5526 /* Put an ABI label supported by FreeBSD >= 4.1. */
5527 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
5528 #ifdef OLD_FREEBSD_ABI_LABEL
5529 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5530 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5535 #undef elf_backend_init_file_header
5536 #define elf_backend_init_file_header \
5537 elf64_alpha_fbsd_init_file_header
5540 #define elf64_bed elf64_alpha_fbsd_bed
5542 #include "elf64-target.h"