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 /* Don't do anything special with non-loaded, non-alloced sections.
1786 In particular, any relocs in such sections should not affect GOT
1787 and PLT reference counting (ie. we don't allow them to create GOT
1788 or PLT entries), there's no possibility or desire to optimize TLS
1789 relocs, and there's not much point in propagating relocs to shared
1790 libs that the dynamic linker won't relocate. */
1791 if ((sec
->flags
& SEC_ALLOC
) == 0)
1794 BFD_ASSERT (is_alpha_elf (abfd
));
1796 dynobj
= elf_hash_table (info
)->dynobj
;
1798 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1801 symtab_hdr
= &elf_symtab_hdr (abfd
);
1802 sym_hashes
= alpha_elf_sym_hashes (abfd
);
1804 relend
= relocs
+ sec
->reloc_count
;
1805 for (rel
= relocs
; rel
< relend
; ++rel
)
1813 unsigned long r_symndx
, r_type
;
1814 struct alpha_elf_link_hash_entry
*h
;
1815 unsigned int gotent_flags
;
1816 bfd_boolean maybe_dynamic
;
1820 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1821 if (r_symndx
< symtab_hdr
->sh_info
)
1825 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1827 while (h
->root
.root
.type
== bfd_link_hash_indirect
1828 || h
->root
.root
.type
== bfd_link_hash_warning
)
1829 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
1831 /* PR15323, ref flags aren't set for references in the same
1833 h
->root
.ref_regular
= 1;
1836 /* We can only get preliminary data on whether a symbol is
1837 locally or externally defined, as not all of the input files
1838 have yet been processed. Do something with what we know, as
1839 this may help reduce memory usage and processing time later. */
1840 maybe_dynamic
= FALSE
;
1841 if (h
&& ((bfd_link_pic (info
)
1843 || info
->unresolved_syms_in_shared_libs
== RM_IGNORE
))
1844 || !h
->root
.def_regular
1845 || h
->root
.root
.type
== bfd_link_hash_defweak
))
1846 maybe_dynamic
= TRUE
;
1850 r_type
= ELF64_R_TYPE (rel
->r_info
);
1851 addend
= rel
->r_addend
;
1855 case R_ALPHA_LITERAL
:
1856 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1858 /* Remember how this literal is used from its LITUSEs.
1859 This will be important when it comes to decide if we can
1860 create a .plt entry for a function symbol. */
1861 while (++rel
< relend
&& ELF64_R_TYPE (rel
->r_info
) == R_ALPHA_LITUSE
)
1862 if (rel
->r_addend
>= 1 && rel
->r_addend
<= 6)
1863 gotent_flags
|= 1 << rel
->r_addend
;
1866 /* No LITUSEs -- presumably the address is used somehow. */
1867 if (gotent_flags
== 0)
1868 gotent_flags
= ALPHA_ELF_LINK_HASH_LU_ADDR
;
1871 case R_ALPHA_GPDISP
:
1872 case R_ALPHA_GPREL16
:
1873 case R_ALPHA_GPREL32
:
1874 case R_ALPHA_GPRELHIGH
:
1875 case R_ALPHA_GPRELLOW
:
1880 case R_ALPHA_REFLONG
:
1881 case R_ALPHA_REFQUAD
:
1882 if (bfd_link_pic (info
) || maybe_dynamic
)
1886 case R_ALPHA_TLSLDM
:
1887 /* The symbol for a TLSLDM reloc is ignored. Collapse the
1888 reloc to the STN_UNDEF (0) symbol so that they all match. */
1889 r_symndx
= STN_UNDEF
;
1891 maybe_dynamic
= FALSE
;
1895 case R_ALPHA_GOTDTPREL
:
1896 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1899 case R_ALPHA_GOTTPREL
:
1900 need
= NEED_GOT
| NEED_GOT_ENTRY
;
1901 gotent_flags
= ALPHA_ELF_LINK_HASH_TLS_IE
;
1902 if (bfd_link_pic (info
))
1903 info
->flags
|= DF_STATIC_TLS
;
1906 case R_ALPHA_TPREL64
:
1907 if (bfd_link_dll (info
))
1909 info
->flags
|= DF_STATIC_TLS
;
1912 else if (maybe_dynamic
)
1917 if (need
& NEED_GOT
)
1919 if (alpha_elf_tdata(abfd
)->gotobj
== NULL
)
1921 if (!elf64_alpha_create_got_section (abfd
, info
))
1926 if (need
& NEED_GOT_ENTRY
)
1928 struct alpha_elf_got_entry
*gotent
;
1930 gotent
= get_got_entry (abfd
, h
, r_type
, r_symndx
, addend
);
1936 gotent
->flags
|= gotent_flags
;
1939 gotent_flags
|= h
->flags
;
1940 h
->flags
= gotent_flags
;
1942 /* Make a guess as to whether a .plt entry is needed. */
1943 /* ??? It appears that we won't make it into
1944 adjust_dynamic_symbol for symbols that remain
1945 totally undefined. Copying this check here means
1946 we can create a plt entry for them too. */
1948 = (maybe_dynamic
&& elf64_alpha_want_plt (h
));
1953 if (need
& NEED_DYNREL
)
1955 /* We need to create the section here now whether we eventually
1956 use it or not so that it gets mapped to an output section by
1957 the linker. If not used, we'll kill it in size_dynamic_sections. */
1960 sreloc
= _bfd_elf_make_dynamic_reloc_section
1961 (sec
, dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1969 /* Since we havn't seen all of the input symbols yet, we
1970 don't know whether we'll actually need a dynamic relocation
1971 entry for this reloc. So make a record of it. Once we
1972 find out if this thing needs dynamic relocation we'll
1973 expand the relocation sections by the appropriate amount. */
1975 struct alpha_elf_reloc_entry
*rent
;
1977 for (rent
= h
->reloc_entries
; rent
; rent
= rent
->next
)
1978 if (rent
->rtype
== r_type
&& rent
->srel
== sreloc
)
1983 size_t amt
= sizeof (struct alpha_elf_reloc_entry
);
1984 rent
= (struct alpha_elf_reloc_entry
*) bfd_alloc (abfd
, amt
);
1988 rent
->srel
= sreloc
;
1990 rent
->rtype
= r_type
;
1993 rent
->next
= h
->reloc_entries
;
1994 h
->reloc_entries
= rent
;
1999 else if (bfd_link_pic (info
))
2001 /* If this is a shared library, and the section is to be
2002 loaded into memory, we need a RELATIVE reloc. */
2003 sreloc
->size
+= sizeof (Elf64_External_Rela
);
2004 if (sec
->flags
& SEC_READONLY
)
2006 info
->flags
|= DF_TEXTREL
;
2007 info
->callbacks
->minfo
2008 (_("%pB: dynamic relocation against `%pT' in "
2009 "read-only section `%pA'\n"),
2010 sec
->owner
, h
->root
.root
.root
.string
, sec
);
2019 /* Return the section that should be marked against GC for a given
2023 elf64_alpha_gc_mark_hook (asection
*sec
, struct bfd_link_info
*info
,
2024 Elf_Internal_Rela
*rel
,
2025 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
)
2027 /* These relocations don't really reference a symbol. Instead we store
2028 extra data in their addend slot. Ignore the symbol. */
2029 switch (ELF64_R_TYPE (rel
->r_info
))
2031 case R_ALPHA_LITUSE
:
2032 case R_ALPHA_GPDISP
:
2037 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2040 /* Adjust a symbol defined by a dynamic object and referenced by a
2041 regular object. The current definition is in some section of the
2042 dynamic object, but we're not including those sections. We have to
2043 change the definition to something the rest of the link can
2047 elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2048 struct elf_link_hash_entry
*h
)
2052 struct alpha_elf_link_hash_entry
*ah
;
2054 dynobj
= elf_hash_table(info
)->dynobj
;
2055 ah
= (struct alpha_elf_link_hash_entry
*)h
;
2057 /* Now that we've seen all of the input symbols, finalize our decision
2058 about whether this symbol should get a .plt entry. Irritatingly, it
2059 is common for folk to leave undefined symbols in shared libraries,
2060 and they still expect lazy binding; accept undefined symbols in lieu
2062 if (alpha_elf_dynamic_symbol_p (h
, info
) && elf64_alpha_want_plt (ah
))
2064 h
->needs_plt
= TRUE
;
2066 s
= elf_hash_table(info
)->splt
;
2067 if (!s
&& !elf64_alpha_create_dynamic_sections (dynobj
, info
))
2070 /* We need one plt entry per got subsection. Delay allocation of
2071 the actual plt entries until size_plt_section, called from
2072 size_dynamic_sections or during relaxation. */
2077 h
->needs_plt
= FALSE
;
2079 /* If this is a weak symbol, and there is a real definition, the
2080 processor independent code will have arranged for us to see the
2081 real definition first, and we can just use the same value. */
2082 if (h
->is_weakalias
)
2084 struct elf_link_hash_entry
*def
= weakdef (h
);
2085 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
2086 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
2087 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
2091 /* This is a reference to a symbol defined by a dynamic object which
2092 is not a function. The Alpha, since it uses .got entries for all
2093 symbols even in regular objects, does not need the hackery of a
2094 .dynbss section and COPY dynamic relocations. */
2099 /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
2102 elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry
*h
,
2103 const Elf_Internal_Sym
*isym
,
2104 bfd_boolean definition
,
2105 bfd_boolean dynamic
)
2107 if (!dynamic
&& definition
)
2108 h
->other
= ((h
->other
& ELF_ST_VISIBILITY (-1))
2109 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
2112 /* Symbol versioning can create new symbols, and make our old symbols
2113 indirect to the new ones. Consolidate the got and reloc information
2114 in these situations. */
2117 elf64_alpha_copy_indirect_symbol (struct bfd_link_info
*info
,
2118 struct elf_link_hash_entry
*dir
,
2119 struct elf_link_hash_entry
*ind
)
2121 struct alpha_elf_link_hash_entry
*hi
2122 = (struct alpha_elf_link_hash_entry
*) ind
;
2123 struct alpha_elf_link_hash_entry
*hs
2124 = (struct alpha_elf_link_hash_entry
*) dir
;
2126 /* Do the merging in the superclass. */
2127 _bfd_elf_link_hash_copy_indirect(info
, dir
, ind
);
2129 /* Merge the flags. Whee. */
2130 hs
->flags
|= hi
->flags
;
2132 /* ??? It's unclear to me what's really supposed to happen when
2133 "merging" defweak and defined symbols, given that we don't
2134 actually throw away the defweak. This more-or-less copies
2135 the logic related to got and plt entries in the superclass. */
2136 if (ind
->root
.type
!= bfd_link_hash_indirect
)
2139 /* Merge the .got entries. Cannibalize the old symbol's list in
2140 doing so, since we don't need it anymore. */
2142 if (hs
->got_entries
== NULL
)
2143 hs
->got_entries
= hi
->got_entries
;
2146 struct alpha_elf_got_entry
*gi
, *gs
, *gin
, *gsh
;
2148 gsh
= hs
->got_entries
;
2149 for (gi
= hi
->got_entries
; gi
; gi
= gin
)
2152 for (gs
= gsh
; gs
; gs
= gs
->next
)
2153 if (gi
->gotobj
== gs
->gotobj
2154 && gi
->reloc_type
== gs
->reloc_type
2155 && gi
->addend
== gs
->addend
)
2157 gs
->use_count
+= gi
->use_count
;
2160 gi
->next
= hs
->got_entries
;
2161 hs
->got_entries
= gi
;
2165 hi
->got_entries
= NULL
;
2167 /* And similar for the reloc entries. */
2169 if (hs
->reloc_entries
== NULL
)
2170 hs
->reloc_entries
= hi
->reloc_entries
;
2173 struct alpha_elf_reloc_entry
*ri
, *rs
, *rin
, *rsh
;
2175 rsh
= hs
->reloc_entries
;
2176 for (ri
= hi
->reloc_entries
; ri
; ri
= rin
)
2179 for (rs
= rsh
; rs
; rs
= rs
->next
)
2180 if (ri
->rtype
== rs
->rtype
&& ri
->srel
== rs
->srel
)
2182 rs
->count
+= ri
->count
;
2185 ri
->next
= hs
->reloc_entries
;
2186 hs
->reloc_entries
= ri
;
2190 hi
->reloc_entries
= NULL
;
2193 /* Is it possible to merge two object file's .got tables? */
2196 elf64_alpha_can_merge_gots (bfd
*a
, bfd
*b
)
2198 int total
= alpha_elf_tdata (a
)->total_got_size
;
2201 /* Trivial quick fallout test. */
2202 if (total
+ alpha_elf_tdata (b
)->total_got_size
<= MAX_GOT_SIZE
)
2205 /* By their nature, local .got entries cannot be merged. */
2206 if ((total
+= alpha_elf_tdata (b
)->local_got_size
) > MAX_GOT_SIZE
)
2209 /* Failing the common trivial comparison, we must effectively
2210 perform the merge. Not actually performing the merge means that
2211 we don't have to store undo information in case we fail. */
2212 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2214 struct alpha_elf_link_hash_entry
**hashes
= alpha_elf_sym_hashes (bsub
);
2215 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2218 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2219 for (i
= 0; i
< n
; ++i
)
2221 struct alpha_elf_got_entry
*ae
, *be
;
2222 struct alpha_elf_link_hash_entry
*h
;
2225 while (h
->root
.root
.type
== bfd_link_hash_indirect
2226 || h
->root
.root
.type
== bfd_link_hash_warning
)
2227 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2229 for (be
= h
->got_entries
; be
; be
= be
->next
)
2231 if (be
->use_count
== 0)
2233 if (be
->gotobj
!= b
)
2236 for (ae
= h
->got_entries
; ae
; ae
= ae
->next
)
2238 && ae
->reloc_type
== be
->reloc_type
2239 && ae
->addend
== be
->addend
)
2242 total
+= alpha_got_entry_size (be
->reloc_type
);
2243 if (total
> MAX_GOT_SIZE
)
2253 /* Actually merge two .got tables. */
2256 elf64_alpha_merge_gots (bfd
*a
, bfd
*b
)
2258 int total
= alpha_elf_tdata (a
)->total_got_size
;
2261 /* Remember local expansion. */
2263 int e
= alpha_elf_tdata (b
)->local_got_size
;
2265 alpha_elf_tdata (a
)->local_got_size
+= e
;
2268 for (bsub
= b
; bsub
; bsub
= alpha_elf_tdata (bsub
)->in_got_link_next
)
2270 struct alpha_elf_got_entry
**local_got_entries
;
2271 struct alpha_elf_link_hash_entry
**hashes
;
2272 Elf_Internal_Shdr
*symtab_hdr
;
2275 /* Let the local .got entries know they are part of a new subsegment. */
2276 local_got_entries
= alpha_elf_tdata (bsub
)->local_got_entries
;
2277 if (local_got_entries
)
2279 n
= elf_tdata (bsub
)->symtab_hdr
.sh_info
;
2280 for (i
= 0; i
< n
; ++i
)
2282 struct alpha_elf_got_entry
*ent
;
2283 for (ent
= local_got_entries
[i
]; ent
; ent
= ent
->next
)
2288 /* Merge the global .got entries. */
2289 hashes
= alpha_elf_sym_hashes (bsub
);
2290 symtab_hdr
= &elf_tdata (bsub
)->symtab_hdr
;
2292 n
= NUM_SHDR_ENTRIES (symtab_hdr
) - symtab_hdr
->sh_info
;
2293 for (i
= 0; i
< n
; ++i
)
2295 struct alpha_elf_got_entry
*ae
, *be
, **pbe
, **start
;
2296 struct alpha_elf_link_hash_entry
*h
;
2299 while (h
->root
.root
.type
== bfd_link_hash_indirect
2300 || h
->root
.root
.type
== bfd_link_hash_warning
)
2301 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
2303 pbe
= start
= &h
->got_entries
;
2304 while ((be
= *pbe
) != NULL
)
2306 if (be
->use_count
== 0)
2309 memset (be
, 0xa5, sizeof (*be
));
2312 if (be
->gotobj
!= b
)
2315 for (ae
= *start
; ae
; ae
= ae
->next
)
2317 && ae
->reloc_type
== be
->reloc_type
2318 && ae
->addend
== be
->addend
)
2320 ae
->flags
|= be
->flags
;
2321 ae
->use_count
+= be
->use_count
;
2323 memset (be
, 0xa5, sizeof (*be
));
2327 total
+= alpha_got_entry_size (be
->reloc_type
);
2335 alpha_elf_tdata (bsub
)->gotobj
= a
;
2337 alpha_elf_tdata (a
)->total_got_size
= total
;
2339 /* Merge the two in_got chains. */
2344 while ((next
= alpha_elf_tdata (bsub
)->in_got_link_next
) != NULL
)
2347 alpha_elf_tdata (bsub
)->in_got_link_next
= b
;
2351 /* Calculate the offsets for the got entries. */
2354 elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry
*h
,
2355 void * arg ATTRIBUTE_UNUSED
)
2357 struct alpha_elf_got_entry
*gotent
;
2359 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2360 if (gotent
->use_count
> 0)
2362 struct alpha_elf_obj_tdata
*td
;
2363 bfd_size_type
*plge
;
2365 td
= alpha_elf_tdata (gotent
->gotobj
);
2366 plge
= &td
->got
->size
;
2367 gotent
->got_offset
= *plge
;
2368 *plge
+= alpha_got_entry_size (gotent
->reloc_type
);
2375 elf64_alpha_calc_got_offsets (struct bfd_link_info
*info
)
2378 struct alpha_elf_link_hash_table
* htab
;
2380 htab
= alpha_elf_hash_table (info
);
2383 got_list
= htab
->got_list
;
2385 /* First, zero out the .got sizes, as we may be recalculating the
2386 .got after optimizing it. */
2387 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2388 alpha_elf_tdata(i
)->got
->size
= 0;
2390 /* Next, fill in the offsets for all the global entries. */
2391 alpha_elf_link_hash_traverse (htab
,
2392 elf64_alpha_calc_got_offsets_for_symbol
,
2395 /* Finally, fill in the offsets for the local entries. */
2396 for (i
= got_list
; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2398 bfd_size_type got_offset
= alpha_elf_tdata(i
)->got
->size
;
2401 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2403 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2406 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2407 if (!local_got_entries
)
2410 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2411 for (gotent
= local_got_entries
[k
]; gotent
; gotent
= gotent
->next
)
2412 if (gotent
->use_count
> 0)
2414 gotent
->got_offset
= got_offset
;
2415 got_offset
+= alpha_got_entry_size (gotent
->reloc_type
);
2419 alpha_elf_tdata(i
)->got
->size
= got_offset
;
2423 /* Constructs the gots. */
2426 elf64_alpha_size_got_sections (struct bfd_link_info
*info
,
2427 bfd_boolean may_merge
)
2429 bfd
*i
, *got_list
, *cur_got_obj
= NULL
;
2430 struct alpha_elf_link_hash_table
* htab
;
2432 htab
= alpha_elf_hash_table (info
);
2435 got_list
= htab
->got_list
;
2437 /* On the first time through, pretend we have an existing got list
2438 consisting of all of the input files. */
2439 if (got_list
== NULL
)
2441 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
2445 if (! is_alpha_elf (i
))
2448 this_got
= alpha_elf_tdata (i
)->gotobj
;
2449 if (this_got
== NULL
)
2452 /* We are assuming no merging has yet occurred. */
2453 BFD_ASSERT (this_got
== i
);
2455 if (alpha_elf_tdata (this_got
)->total_got_size
> MAX_GOT_SIZE
)
2457 /* Yikes! A single object file has too many entries. */
2459 /* xgettext:c-format */
2460 (_("%pB: .got subsegment exceeds 64K (size %d)"),
2461 i
, alpha_elf_tdata (this_got
)->total_got_size
);
2465 if (got_list
== NULL
)
2466 got_list
= this_got
;
2468 alpha_elf_tdata(cur_got_obj
)->got_link_next
= this_got
;
2469 cur_got_obj
= this_got
;
2472 /* Strange degenerate case of no got references. */
2473 if (got_list
== NULL
)
2476 htab
->got_list
= got_list
;
2479 cur_got_obj
= got_list
;
2480 if (cur_got_obj
== NULL
)
2485 i
= alpha_elf_tdata(cur_got_obj
)->got_link_next
;
2488 if (elf64_alpha_can_merge_gots (cur_got_obj
, i
))
2490 elf64_alpha_merge_gots (cur_got_obj
, i
);
2492 alpha_elf_tdata(i
)->got
->size
= 0;
2493 i
= alpha_elf_tdata(i
)->got_link_next
;
2494 alpha_elf_tdata(cur_got_obj
)->got_link_next
= i
;
2499 i
= alpha_elf_tdata(i
)->got_link_next
;
2504 /* Once the gots have been merged, fill in the got offsets for
2505 everything therein. */
2506 elf64_alpha_calc_got_offsets (info
);
2512 elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry
*h
,
2515 asection
*splt
= (asection
*) data
;
2516 struct alpha_elf_got_entry
*gotent
;
2517 bfd_boolean saw_one
= FALSE
;
2519 /* If we didn't need an entry before, we still don't. */
2520 if (!h
->root
.needs_plt
)
2523 /* For each LITERAL got entry still in use, allocate a plt entry. */
2524 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2525 if (gotent
->reloc_type
== R_ALPHA_LITERAL
2526 && gotent
->use_count
> 0)
2528 if (splt
->size
== 0)
2529 splt
->size
= PLT_HEADER_SIZE
;
2530 gotent
->plt_offset
= splt
->size
;
2531 splt
->size
+= PLT_ENTRY_SIZE
;
2535 /* If there weren't any, there's no longer a need for the PLT entry. */
2537 h
->root
.needs_plt
= FALSE
;
2542 /* Called from relax_section to rebuild the PLT in light of potential changes
2543 in the function's status. */
2546 elf64_alpha_size_plt_section (struct bfd_link_info
*info
)
2548 asection
*splt
, *spltrel
, *sgotplt
;
2549 unsigned long entries
;
2550 struct alpha_elf_link_hash_table
* htab
;
2552 htab
= alpha_elf_hash_table (info
);
2556 splt
= elf_hash_table(info
)->splt
;
2562 alpha_elf_link_hash_traverse (htab
,
2563 elf64_alpha_size_plt_section_1
, splt
);
2565 /* Every plt entry requires a JMP_SLOT relocation. */
2566 spltrel
= elf_hash_table(info
)->srelplt
;
2570 if (elf64_alpha_use_secureplt
)
2571 entries
= (splt
->size
- NEW_PLT_HEADER_SIZE
) / NEW_PLT_ENTRY_SIZE
;
2573 entries
= (splt
->size
- OLD_PLT_HEADER_SIZE
) / OLD_PLT_ENTRY_SIZE
;
2575 spltrel
->size
= entries
* sizeof (Elf64_External_Rela
);
2577 /* When using the secureplt, we need two words somewhere in the data
2578 segment for the dynamic linker to tell us where to go. This is the
2579 entire contents of the .got.plt section. */
2580 if (elf64_alpha_use_secureplt
)
2582 sgotplt
= elf_hash_table(info
)->sgotplt
;
2583 sgotplt
->size
= entries
? 16 : 0;
2588 elf64_alpha_always_size_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2589 struct bfd_link_info
*info
)
2592 struct alpha_elf_link_hash_table
* htab
;
2594 if (bfd_link_relocatable (info
))
2597 htab
= alpha_elf_hash_table (info
);
2601 if (!elf64_alpha_size_got_sections (info
, TRUE
))
2604 /* Allocate space for all of the .got subsections. */
2606 for ( ; i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2608 asection
*s
= alpha_elf_tdata(i
)->got
;
2611 s
->contents
= (bfd_byte
*) bfd_zalloc (i
, s
->size
);
2612 if (s
->contents
== NULL
)
2620 /* The number of dynamic relocations required by a static relocation. */
2623 alpha_dynamic_entries_for_reloc (int r_type
, int dynamic
, int shared
, int pie
)
2627 /* May appear in GOT entries. */
2629 return (dynamic
? 2 : shared
? 1 : 0);
2630 case R_ALPHA_TLSLDM
:
2632 case R_ALPHA_LITERAL
:
2633 return dynamic
|| shared
;
2634 case R_ALPHA_GOTTPREL
:
2635 return dynamic
|| (shared
&& !pie
);
2636 case R_ALPHA_GOTDTPREL
:
2639 /* May appear in data sections. */
2640 case R_ALPHA_REFLONG
:
2641 case R_ALPHA_REFQUAD
:
2642 return dynamic
|| shared
;
2643 case R_ALPHA_TPREL64
:
2644 return dynamic
|| (shared
&& !pie
);
2646 /* Everything else is illegal. We'll issue an error during
2647 relocate_section. */
2653 /* Work out the sizes of the dynamic relocation entries. */
2656 elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry
*h
,
2657 struct bfd_link_info
*info
)
2659 bfd_boolean dynamic
;
2660 struct alpha_elf_reloc_entry
*relent
;
2661 unsigned long entries
;
2663 /* If the symbol was defined as a common symbol in a regular object
2664 file, and there was no definition in any dynamic object, then the
2665 linker will have allocated space for the symbol in a common
2666 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
2667 set. This is done for dynamic symbols in
2668 elf_adjust_dynamic_symbol but this is not done for non-dynamic
2669 symbols, somehow. */
2670 if (!h
->root
.def_regular
2671 && h
->root
.ref_regular
2672 && !h
->root
.def_dynamic
2673 && (h
->root
.root
.type
== bfd_link_hash_defined
2674 || h
->root
.root
.type
== bfd_link_hash_defweak
)
2675 && !(h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
))
2676 h
->root
.def_regular
= 1;
2678 /* If the symbol is dynamic, we'll need all the relocations in their
2679 natural form. If this is a shared object, and it has been forced
2680 local, we'll need the same number of RELATIVE relocations. */
2681 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2683 /* If the symbol is a hidden undefined weak, then we never have any
2684 relocations. Avoid the loop which may want to add RELATIVE relocs
2685 based on bfd_link_pic (info). */
2686 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2689 for (relent
= h
->reloc_entries
; relent
; relent
= relent
->next
)
2691 entries
= alpha_dynamic_entries_for_reloc (relent
->rtype
, dynamic
,
2692 bfd_link_pic (info
),
2693 bfd_link_pie (info
));
2696 asection
*sec
= relent
->sec
;
2697 relent
->srel
->size
+=
2698 entries
* sizeof (Elf64_External_Rela
) * relent
->count
;
2699 if ((sec
->flags
& SEC_READONLY
) != 0)
2701 info
->flags
|= DT_TEXTREL
;
2702 info
->callbacks
->minfo
2703 (_("%pB: dynamic relocation against `%pT' in "
2704 "read-only section `%pA'\n"),
2705 sec
->owner
, h
->root
.root
.root
.string
, sec
);
2713 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
2717 elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry
*h
,
2718 struct bfd_link_info
*info
)
2720 bfd_boolean dynamic
;
2721 struct alpha_elf_got_entry
*gotent
;
2722 unsigned long entries
;
2724 /* If we're using a plt for this symbol, then all of its relocations
2725 for its got entries go into .rela.plt. */
2726 if (h
->root
.needs_plt
)
2729 /* If the symbol is dynamic, we'll need all the relocations in their
2730 natural form. If this is a shared object, and it has been forced
2731 local, we'll need the same number of RELATIVE relocations. */
2732 dynamic
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
2734 /* If the symbol is a hidden undefined weak, then we never have any
2735 relocations. Avoid the loop which may want to add RELATIVE relocs
2736 based on bfd_link_pic (info). */
2737 if (h
->root
.root
.type
== bfd_link_hash_undefweak
&& !dynamic
)
2741 for (gotent
= h
->got_entries
; gotent
; gotent
= gotent
->next
)
2742 if (gotent
->use_count
> 0)
2743 entries
+= alpha_dynamic_entries_for_reloc (gotent
->reloc_type
, dynamic
,
2744 bfd_link_pic (info
),
2745 bfd_link_pie (info
));
2749 asection
*srel
= elf_hash_table(info
)->srelgot
;
2750 BFD_ASSERT (srel
!= NULL
);
2751 srel
->size
+= sizeof (Elf64_External_Rela
) * entries
;
2757 /* Set the sizes of the dynamic relocation sections. */
2760 elf64_alpha_size_rela_got_section (struct bfd_link_info
*info
)
2762 unsigned long entries
;
2765 struct alpha_elf_link_hash_table
* htab
;
2767 htab
= alpha_elf_hash_table (info
);
2771 /* Shared libraries often require RELATIVE relocs, and some relocs
2772 require attention for the main application as well. */
2775 for (i
= htab
->got_list
;
2776 i
; i
= alpha_elf_tdata(i
)->got_link_next
)
2780 for (j
= i
; j
; j
= alpha_elf_tdata(j
)->in_got_link_next
)
2782 struct alpha_elf_got_entry
**local_got_entries
, *gotent
;
2785 local_got_entries
= alpha_elf_tdata(j
)->local_got_entries
;
2786 if (!local_got_entries
)
2789 for (k
= 0, n
= elf_tdata(j
)->symtab_hdr
.sh_info
; k
< n
; ++k
)
2790 for (gotent
= local_got_entries
[k
];
2791 gotent
; gotent
= gotent
->next
)
2792 if (gotent
->use_count
> 0)
2793 entries
+= (alpha_dynamic_entries_for_reloc
2794 (gotent
->reloc_type
, 0, bfd_link_pic (info
),
2795 bfd_link_pie (info
)));
2799 srel
= elf_hash_table(info
)->srelgot
;
2802 BFD_ASSERT (entries
== 0);
2805 srel
->size
= sizeof (Elf64_External_Rela
) * entries
;
2807 /* Now do the non-local symbols. */
2808 alpha_elf_link_hash_traverse (htab
,
2809 elf64_alpha_size_rela_got_1
, info
);
2812 /* Set the sizes of the dynamic sections. */
2815 elf64_alpha_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2816 struct bfd_link_info
*info
)
2820 bfd_boolean relplt
, relocs
;
2821 struct alpha_elf_link_hash_table
* htab
;
2823 htab
= alpha_elf_hash_table (info
);
2827 dynobj
= elf_hash_table(info
)->dynobj
;
2828 BFD_ASSERT(dynobj
!= NULL
);
2830 if (elf_hash_table (info
)->dynamic_sections_created
)
2832 /* Set the contents of the .interp section to the interpreter. */
2833 if (bfd_link_executable (info
) && !info
->nointerp
)
2835 s
= bfd_get_linker_section (dynobj
, ".interp");
2836 BFD_ASSERT (s
!= NULL
);
2837 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2838 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2841 /* Now that we've seen all of the input files, we can decide which
2842 symbols need dynamic relocation entries and which don't. We've
2843 collected information in check_relocs that we can now apply to
2844 size the dynamic relocation sections. */
2845 alpha_elf_link_hash_traverse (htab
,
2846 elf64_alpha_calc_dynrel_sizes
, info
);
2848 elf64_alpha_size_rela_got_section (info
);
2849 elf64_alpha_size_plt_section (info
);
2851 /* else we're not dynamic and by definition we don't need such things. */
2853 /* The check_relocs and adjust_dynamic_symbol entry points have
2854 determined the sizes of the various dynamic sections. Allocate
2858 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2862 if (!(s
->flags
& SEC_LINKER_CREATED
))
2865 /* It's OK to base decisions on the section name, because none
2866 of the dynobj section names depend upon the input files. */
2867 name
= bfd_section_name (s
);
2869 if (CONST_STRNEQ (name
, ".rela"))
2873 if (strcmp (name
, ".rela.plt") == 0)
2878 /* We use the reloc_count field as a counter if we need
2879 to copy relocs into the output file. */
2883 else if (! CONST_STRNEQ (name
, ".got")
2884 && strcmp (name
, ".plt") != 0
2885 && strcmp (name
, ".dynbss") != 0)
2887 /* It's not one of our dynamic sections, so don't allocate space. */
2893 /* If we don't need this section, strip it from the output file.
2894 This is to handle .rela.bss and .rela.plt. We must create it
2895 in create_dynamic_sections, because it must be created before
2896 the linker maps input sections to output sections. The
2897 linker does that before adjust_dynamic_symbol is called, and
2898 it is that function which decides whether anything needs to
2899 go into these sections. */
2900 if (!CONST_STRNEQ (name
, ".got"))
2901 s
->flags
|= SEC_EXCLUDE
;
2903 else if ((s
->flags
& SEC_HAS_CONTENTS
) != 0)
2905 /* Allocate memory for the section contents. */
2906 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2907 if (s
->contents
== NULL
)
2912 if (elf_hash_table (info
)->dynamic_sections_created
)
2914 /* Add some entries to the .dynamic section. We fill in the
2915 values later, in elf64_alpha_finish_dynamic_sections, but we
2916 must add the entries now so that we get the correct size for
2917 the .dynamic section. The DT_DEBUG entry is filled in by the
2918 dynamic linker and used by the debugger. */
2919 #define add_dynamic_entry(TAG, VAL) \
2920 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2922 if (bfd_link_executable (info
))
2924 if (!add_dynamic_entry (DT_DEBUG
, 0))
2930 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2931 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2932 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2933 || !add_dynamic_entry (DT_JMPREL
, 0))
2936 if (elf64_alpha_use_secureplt
2937 && !add_dynamic_entry (DT_ALPHA_PLTRO
, 1))
2943 if (!add_dynamic_entry (DT_RELA
, 0)
2944 || !add_dynamic_entry (DT_RELASZ
, 0)
2945 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2948 if (info
->flags
& DF_TEXTREL
)
2950 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2955 #undef add_dynamic_entry
2960 /* These functions do relaxation for Alpha ELF.
2962 Currently I'm only handling what I can do with existing compiler
2963 and assembler support, which means no instructions are removed,
2964 though some may be nopped. At this time GCC does not emit enough
2965 information to do all of the relaxing that is possible. It will
2966 take some not small amount of work for that to happen.
2968 There are a couple of interesting papers that I once read on this
2969 subject, that I cannot find references to at the moment, that
2970 related to Alpha in particular. They are by David Wall, then of
2973 struct alpha_relax_info
2978 Elf_Internal_Shdr
*symtab_hdr
;
2979 Elf_Internal_Rela
*relocs
, *relend
;
2980 struct bfd_link_info
*link_info
;
2984 struct alpha_elf_link_hash_entry
*h
;
2985 struct alpha_elf_got_entry
**first_gotent
;
2986 struct alpha_elf_got_entry
*gotent
;
2987 bfd_boolean changed_contents
;
2988 bfd_boolean changed_relocs
;
2989 unsigned char other
;
2992 static Elf_Internal_Rela
*
2993 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela
*rel
,
2994 Elf_Internal_Rela
*relend
,
2995 bfd_vma offset
, int type
)
2997 while (rel
< relend
)
2999 if (rel
->r_offset
== offset
3000 && ELF64_R_TYPE (rel
->r_info
) == (unsigned int) type
)
3008 elf64_alpha_relax_got_load (struct alpha_relax_info
*info
, bfd_vma symval
,
3009 Elf_Internal_Rela
*irel
, unsigned long r_type
)
3012 bfd_signed_vma disp
;
3014 /* Get the instruction. */
3015 insn
= bfd_get_32 (info
->abfd
, info
->contents
+ irel
->r_offset
);
3017 if (insn
>> 26 != OP_LDQ
)
3019 reloc_howto_type
*howto
= elf64_alpha_howto_table
+ r_type
;
3021 /* xgettext:c-format */
3022 (_("%pB: %pA+%#" PRIx64
": warning: "
3023 "%s relocation against unexpected insn"),
3024 info
->abfd
, info
->sec
, (uint64_t) irel
->r_offset
, howto
->name
);
3028 /* Can't relax dynamic symbols. */
3029 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3032 /* Can't use local-exec relocations in shared libraries. */
3033 if (r_type
== R_ALPHA_GOTTPREL
3034 && bfd_link_dll (info
->link_info
))
3037 if (r_type
== R_ALPHA_LITERAL
)
3039 /* Look for nice constant addresses. This includes the not-uncommon
3040 special case of 0 for undefweak symbols. */
3041 if ((info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3042 || (!bfd_link_pic (info
->link_info
)
3043 && (symval
>= (bfd_vma
)-0x8000 || symval
< 0x8000)))
3046 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3047 insn
|= (symval
& 0xffff);
3048 r_type
= R_ALPHA_NONE
;
3052 /* We may only create GPREL relocs during the second pass. */
3053 if (info
->link_info
->relax_pass
== 0)
3056 disp
= symval
- info
->gp
;
3057 insn
= (OP_LDA
<< 26) | (insn
& 0x03ff0000);
3058 r_type
= R_ALPHA_GPREL16
;
3063 bfd_vma dtp_base
, tp_base
;
3065 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3066 dtp_base
= alpha_get_dtprel_base (info
->link_info
);
3067 tp_base
= alpha_get_tprel_base (info
->link_info
);
3068 disp
= symval
- (r_type
== R_ALPHA_GOTDTPREL
? dtp_base
: tp_base
);
3070 insn
= (OP_LDA
<< 26) | (insn
& (31 << 21)) | (31 << 16);
3074 case R_ALPHA_GOTDTPREL
:
3075 r_type
= R_ALPHA_DTPREL16
;
3077 case R_ALPHA_GOTTPREL
:
3078 r_type
= R_ALPHA_TPREL16
;
3086 if (disp
< -0x8000 || disp
>= 0x8000)
3089 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, info
->contents
+ irel
->r_offset
);
3090 info
->changed_contents
= TRUE
;
3092 /* Reduce the use count on this got entry by one, possibly
3094 if (--info
->gotent
->use_count
== 0)
3096 int sz
= alpha_got_entry_size (r_type
);
3097 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3099 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3102 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3103 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
), r_type
);
3104 info
->changed_relocs
= TRUE
;
3106 /* ??? Search forward through this basic block looking for insns
3107 that use the target register. Stop after an insn modifying the
3108 register is seen, or after a branch or call.
3110 Any such memory load insn may be substituted by a load directly
3111 off the GP. This allows the memory load insn to be issued before
3112 the calculated GP register would otherwise be ready.
3114 Any such jsr insn can be replaced by a bsr if it is in range.
3116 This would mean that we'd have to _add_ relocations, the pain of
3117 which gives one pause. */
3123 elf64_alpha_relax_opt_call (struct alpha_relax_info
*info
, bfd_vma symval
)
3125 /* If the function has the same gp, and we can identify that the
3126 function does not use its function pointer, we can eliminate the
3129 /* If the symbol is marked NOPV, we are being told the function never
3130 needs its procedure value. */
3131 if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_NOPV
)
3134 /* If the symbol is marked STD_GP, we are being told the function does
3135 a normal ldgp in the first two words. */
3136 else if ((info
->other
& STO_ALPHA_STD_GPLOAD
) == STO_ALPHA_STD_GPLOAD
)
3139 /* Otherwise, we may be able to identify a GP load in the first two
3140 words, which we can then skip. */
3143 Elf_Internal_Rela
*tsec_relocs
, *tsec_relend
, *tsec_free
, *gpdisp
;
3146 /* Load the relocations from the section that the target symbol is in. */
3147 if (info
->sec
== info
->tsec
)
3149 tsec_relocs
= info
->relocs
;
3150 tsec_relend
= info
->relend
;
3155 tsec_relocs
= (_bfd_elf_link_read_relocs
3156 (info
->abfd
, info
->tsec
, NULL
,
3157 (Elf_Internal_Rela
*) NULL
,
3158 info
->link_info
->keep_memory
));
3159 if (tsec_relocs
== NULL
)
3161 tsec_relend
= tsec_relocs
+ info
->tsec
->reloc_count
;
3162 tsec_free
= (elf_section_data (info
->tsec
)->relocs
== tsec_relocs
3167 /* Recover the symbol's offset within the section. */
3168 ofs
= (symval
- info
->tsec
->output_section
->vma
3169 - info
->tsec
->output_offset
);
3171 /* Look for a GPDISP reloc. */
3172 gpdisp
= (elf64_alpha_find_reloc_at_ofs
3173 (tsec_relocs
, tsec_relend
, ofs
, R_ALPHA_GPDISP
));
3175 if (!gpdisp
|| gpdisp
->r_addend
!= 4)
3183 /* We've now determined that we can skip an initial gp load. Verify
3184 that the call and the target use the same gp. */
3185 if (info
->link_info
->output_bfd
->xvec
!= info
->tsec
->owner
->xvec
3186 || info
->gotobj
!= alpha_elf_tdata (info
->tsec
->owner
)->gotobj
)
3193 elf64_alpha_relax_with_lituse (struct alpha_relax_info
*info
,
3194 bfd_vma symval
, Elf_Internal_Rela
*irel
)
3196 Elf_Internal_Rela
*urel
, *erel
, *irelend
= info
->relend
;
3198 bfd_signed_vma disp
;
3201 bfd_boolean lit_reused
= FALSE
;
3202 bfd_boolean all_optimized
= TRUE
;
3203 bfd_boolean changed_contents
;
3204 bfd_boolean changed_relocs
;
3205 bfd_byte
*contents
= info
->contents
;
3206 bfd
*abfd
= info
->abfd
;
3207 bfd_vma sec_output_vma
;
3208 unsigned int lit_insn
;
3211 lit_insn
= bfd_get_32 (abfd
, contents
+ irel
->r_offset
);
3212 if (lit_insn
>> 26 != OP_LDQ
)
3215 /* xgettext:c-format */
3216 (_("%pB: %pA+%#" PRIx64
": warning: "
3217 "%s relocation against unexpected insn"),
3218 abfd
, info
->sec
, (uint64_t) irel
->r_offset
, "LITERAL");
3222 /* Can't relax dynamic symbols. */
3223 if (alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
))
3226 changed_contents
= info
->changed_contents
;
3227 changed_relocs
= info
->changed_relocs
;
3228 sec_output_vma
= info
->sec
->output_section
->vma
+ info
->sec
->output_offset
;
3229 relax_pass
= info
->link_info
->relax_pass
;
3231 /* Summarize how this particular LITERAL is used. */
3232 for (erel
= irel
+1, flags
= 0; erel
< irelend
; ++erel
)
3234 if (ELF64_R_TYPE (erel
->r_info
) != R_ALPHA_LITUSE
)
3236 if (erel
->r_addend
<= 6)
3237 flags
|= 1 << erel
->r_addend
;
3240 /* A little preparation for the loop... */
3241 disp
= symval
- info
->gp
;
3243 for (urel
= irel
+1; urel
< erel
; ++urel
)
3245 bfd_vma urel_r_offset
= urel
->r_offset
;
3248 bfd_signed_vma xdisp
;
3249 Elf_Internal_Rela nrel
;
3251 insn
= bfd_get_32 (abfd
, contents
+ urel_r_offset
);
3253 switch (urel
->r_addend
)
3255 case LITUSE_ALPHA_ADDR
:
3257 /* This type is really just a placeholder to note that all
3258 uses cannot be optimized, but to still allow some. */
3259 all_optimized
= FALSE
;
3262 case LITUSE_ALPHA_BASE
:
3263 /* We may only create GPREL relocs during the second pass. */
3264 if (relax_pass
== 0)
3266 all_optimized
= FALSE
;
3270 /* We can always optimize 16-bit displacements. */
3272 /* Extract the displacement from the instruction, sign-extending
3273 it if necessary, then test whether it is within 16 or 32 bits
3274 displacement from GP. */
3275 insn_disp
= ((insn
& 0xffff) ^ 0x8000) - 0x8000;
3277 xdisp
= disp
+ insn_disp
;
3278 fits16
= (xdisp
>= - (bfd_signed_vma
) 0x8000 && xdisp
< 0x8000);
3279 fits32
= (xdisp
>= - (bfd_signed_vma
) 0x80000000
3280 && xdisp
< 0x7fff8000);
3284 /* Take the op code and dest from this insn, take the base
3285 register from the literal insn. Leave the offset alone. */
3286 insn
= (insn
& 0xffe0ffff) | (lit_insn
& 0x001f0000);
3287 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3288 changed_contents
= TRUE
;
3291 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3293 nrel
.r_addend
= irel
->r_addend
;
3295 /* As we adjust, move the reloc to the end so that we don't
3296 break the LITERAL+LITUSE chain. */
3300 changed_relocs
= TRUE
;
3303 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3304 else if (fits32
&& !(flags
& ~6))
3306 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3308 irel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3310 lit_insn
= (OP_LDAH
<< 26) | (lit_insn
& 0x03ff0000);
3311 bfd_put_32 (abfd
, (bfd_vma
) lit_insn
, contents
+ irel
->r_offset
);
3313 changed_contents
= TRUE
;
3315 /* Since all relocs must be optimized, don't bother swapping
3316 this relocation to the end. */
3317 urel
->r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3319 urel
->r_addend
= irel
->r_addend
;
3320 changed_relocs
= TRUE
;
3323 all_optimized
= FALSE
;
3326 case LITUSE_ALPHA_BYTOFF
:
3327 /* We can always optimize byte instructions. */
3329 /* FIXME: sanity check the insn for byte op. Check that the
3330 literal dest reg is indeed Rb in the byte insn. */
3332 insn
&= ~ (unsigned) 0x001ff000;
3333 insn
|= ((symval
& 7) << 13) | 0x1000;
3334 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3335 changed_contents
= TRUE
;
3338 nrel
.r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3341 /* As we adjust, move the reloc to the end so that we don't
3342 break the LITERAL+LITUSE chain. */
3346 changed_relocs
= TRUE
;
3349 case LITUSE_ALPHA_JSR
:
3350 case LITUSE_ALPHA_TLSGD
:
3351 case LITUSE_ALPHA_TLSLDM
:
3352 case LITUSE_ALPHA_JSRDIRECT
:
3354 bfd_vma optdest
, org
;
3355 bfd_signed_vma odisp
;
3357 /* For undefined weak symbols, we're mostly interested in getting
3358 rid of the got entry whenever possible, so optimize this to a
3359 use of the zero register. */
3360 if (info
->h
&& info
->h
->root
.root
.type
== bfd_link_hash_undefweak
)
3363 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3365 changed_contents
= TRUE
;
3369 /* If not zero, place to jump without needing pv. */
3370 optdest
= elf64_alpha_relax_opt_call (info
, symval
);
3371 org
= sec_output_vma
+ urel_r_offset
+ 4;
3372 odisp
= (optdest
? optdest
: symval
) - org
;
3374 if (odisp
>= -0x400000 && odisp
< 0x400000)
3376 Elf_Internal_Rela
*xrel
;
3378 /* Preserve branch prediction call stack when possible. */
3379 if ((insn
& INSN_JSR_MASK
) == INSN_JSR
)
3380 insn
= (OP_BSR
<< 26) | (insn
& 0x03e00000);
3382 insn
= (OP_BR
<< 26) | (insn
& 0x03e00000);
3383 bfd_put_32 (abfd
, (bfd_vma
) insn
, contents
+ urel_r_offset
);
3384 changed_contents
= TRUE
;
3387 nrel
.r_info
= ELF64_R_INFO (ELF64_R_SYM (irel
->r_info
),
3389 nrel
.r_addend
= irel
->r_addend
;
3392 nrel
.r_addend
+= optdest
- symval
;
3394 all_optimized
= FALSE
;
3396 /* Kill any HINT reloc that might exist for this insn. */
3397 xrel
= (elf64_alpha_find_reloc_at_ofs
3398 (info
->relocs
, info
->relend
, urel_r_offset
,
3401 xrel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3403 /* As we adjust, move the reloc to the end so that we don't
3404 break the LITERAL+LITUSE chain. */
3409 info
->changed_relocs
= TRUE
;
3412 all_optimized
= FALSE
;
3414 /* Even if the target is not in range for a direct branch,
3415 if we share a GP, we can eliminate the gp reload. */
3418 Elf_Internal_Rela
*gpdisp
3419 = (elf64_alpha_find_reloc_at_ofs
3420 (info
->relocs
, irelend
, urel_r_offset
+ 4,
3424 bfd_byte
*p_ldah
= contents
+ gpdisp
->r_offset
;
3425 bfd_byte
*p_lda
= p_ldah
+ gpdisp
->r_addend
;
3426 unsigned int ldah
= bfd_get_32 (abfd
, p_ldah
);
3427 unsigned int lda
= bfd_get_32 (abfd
, p_lda
);
3429 /* Verify that the instruction is "ldah $29,0($26)".
3430 Consider a function that ends in a noreturn call,
3431 and that the next function begins with an ldgp,
3432 and that by accident there is no padding between.
3433 In that case the insn would use $27 as the base. */
3434 if (ldah
== 0x27ba0000 && lda
== 0x23bd0000)
3436 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_ldah
);
3437 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, p_lda
);
3439 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3440 changed_contents
= TRUE
;
3441 changed_relocs
= TRUE
;
3450 /* If we reused the literal instruction, we must have optimized all. */
3451 BFD_ASSERT(!lit_reused
|| all_optimized
);
3453 /* If all cases were optimized, we can reduce the use count on this
3454 got entry by one, possibly eliminating it. */
3457 if (--info
->gotent
->use_count
== 0)
3459 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3460 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3462 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3465 /* If the literal instruction is no longer needed (it may have been
3466 reused. We can eliminate it. */
3467 /* ??? For now, I don't want to deal with compacting the section,
3468 so just nop it out. */
3471 irel
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3472 changed_relocs
= TRUE
;
3474 bfd_put_32 (abfd
, (bfd_vma
) INSN_UNOP
, contents
+ irel
->r_offset
);
3475 changed_contents
= TRUE
;
3479 info
->changed_contents
= changed_contents
;
3480 info
->changed_relocs
= changed_relocs
;
3482 if (all_optimized
|| relax_pass
== 0)
3484 return elf64_alpha_relax_got_load (info
, symval
, irel
, R_ALPHA_LITERAL
);
3488 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info
*info
, bfd_vma symval
,
3489 Elf_Internal_Rela
*irel
, bfd_boolean is_gd
)
3492 unsigned int insn
, tlsgd_reg
;
3493 Elf_Internal_Rela
*gpdisp
, *hint
;
3494 bfd_boolean dynamic
, use_gottprel
;
3495 unsigned long new_symndx
;
3497 dynamic
= alpha_elf_dynamic_symbol_p (&info
->h
->root
, info
->link_info
);
3499 /* If a TLS symbol is accessed using IE at least once, there is no point
3500 to use dynamic model for it. */
3501 if (is_gd
&& info
->h
&& (info
->h
->flags
& ALPHA_ELF_LINK_HASH_TLS_IE
))
3504 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3505 then we might as well relax to IE. */
3506 else if (bfd_link_pic (info
->link_info
) && !dynamic
3507 && (info
->link_info
->flags
& DF_STATIC_TLS
))
3510 /* Otherwise we must be building an executable to do anything. */
3511 else if (bfd_link_pic (info
->link_info
))
3514 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3515 the matching LITUSE_TLS relocations. */
3516 if (irel
+ 2 >= info
->relend
)
3518 if (ELF64_R_TYPE (irel
[1].r_info
) != R_ALPHA_LITERAL
3519 || ELF64_R_TYPE (irel
[2].r_info
) != R_ALPHA_LITUSE
3520 || irel
[2].r_addend
!= (is_gd
? LITUSE_ALPHA_TLSGD
: LITUSE_ALPHA_TLSLDM
))
3523 /* There must be a GPDISP relocation positioned immediately after the
3524 LITUSE relocation. */
3525 gpdisp
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3526 irel
[2].r_offset
+ 4, R_ALPHA_GPDISP
);
3530 pos
[0] = info
->contents
+ irel
[0].r_offset
;
3531 pos
[1] = info
->contents
+ irel
[1].r_offset
;
3532 pos
[2] = info
->contents
+ irel
[2].r_offset
;
3533 pos
[3] = info
->contents
+ gpdisp
->r_offset
;
3534 pos
[4] = pos
[3] + gpdisp
->r_addend
;
3536 /* Beware of the compiler hoisting part of the sequence out a loop
3537 and adjusting the destination register for the TLSGD insn. If this
3538 happens, there will be a move into $16 before the JSR insn, so only
3539 transformations of the first insn pair should use this register. */
3540 tlsgd_reg
= bfd_get_32 (info
->abfd
, pos
[0]);
3541 tlsgd_reg
= (tlsgd_reg
>> 21) & 31;
3543 /* Generally, the positions are not allowed to be out of order, lest the
3544 modified insn sequence have different register lifetimes. We can make
3545 an exception when pos 1 is adjacent to pos 0. */
3546 if (pos
[1] + 4 == pos
[0])
3548 bfd_byte
*tmp
= pos
[0];
3552 if (pos
[1] >= pos
[2] || pos
[2] >= pos
[3])
3555 /* Reduce the use count on the LITERAL relocation. Do this before we
3556 smash the symndx when we adjust the relocations below. */
3558 struct alpha_elf_got_entry
*lit_gotent
;
3559 struct alpha_elf_link_hash_entry
*lit_h
;
3562 BFD_ASSERT (ELF64_R_SYM (irel
[1].r_info
) >= info
->symtab_hdr
->sh_info
);
3563 indx
= ELF64_R_SYM (irel
[1].r_info
) - info
->symtab_hdr
->sh_info
;
3564 lit_h
= alpha_elf_sym_hashes (info
->abfd
)[indx
];
3566 while (lit_h
->root
.root
.type
== bfd_link_hash_indirect
3567 || lit_h
->root
.root
.type
== bfd_link_hash_warning
)
3568 lit_h
= (struct alpha_elf_link_hash_entry
*) lit_h
->root
.root
.u
.i
.link
;
3570 for (lit_gotent
= lit_h
->got_entries
; lit_gotent
;
3571 lit_gotent
= lit_gotent
->next
)
3572 if (lit_gotent
->gotobj
== info
->gotobj
3573 && lit_gotent
->reloc_type
== R_ALPHA_LITERAL
3574 && lit_gotent
->addend
== irel
[1].r_addend
)
3576 BFD_ASSERT (lit_gotent
);
3578 if (--lit_gotent
->use_count
== 0)
3580 int sz
= alpha_got_entry_size (R_ALPHA_LITERAL
);
3581 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3587 lda $16,x($gp) !tlsgd!1
3588 ldq $27,__tls_get_addr($gp) !literal!1
3589 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3590 ldah $29,0($26) !gpdisp!2
3591 lda $29,0($29) !gpdisp!2
3593 ldq $16,x($gp) !gottprel
3598 or the first pair to
3599 lda $16,x($gp) !tprel
3602 ldah $16,x($gp) !tprelhi
3603 lda $16,x($16) !tprello
3607 use_gottprel
= FALSE
;
3608 new_symndx
= is_gd
? ELF64_R_SYM (irel
->r_info
) : STN_UNDEF
;
3610 /* Some compilers warn about a Boolean-looking expression being
3611 used in a switch. The explicit cast silences them. */
3612 switch ((int) (!dynamic
&& !bfd_link_pic (info
->link_info
)))
3617 bfd_signed_vma disp
;
3619 BFD_ASSERT (elf_hash_table (info
->link_info
)->tls_sec
!= NULL
);
3620 tp_base
= alpha_get_tprel_base (info
->link_info
);
3621 disp
= symval
- tp_base
;
3623 if (disp
>= -0x8000 && disp
< 0x8000)
3625 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3626 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3627 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3629 irel
[0].r_offset
= pos
[0] - info
->contents
;
3630 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPREL16
);
3631 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3634 else if (disp
>= -(bfd_signed_vma
) 0x80000000
3635 && disp
< (bfd_signed_vma
) 0x7fff8000
3636 && pos
[0] + 4 == pos
[1])
3638 insn
= (OP_LDAH
<< 26) | (tlsgd_reg
<< 21) | (31 << 16);
3639 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3640 insn
= (OP_LDA
<< 26) | (tlsgd_reg
<< 21) | (tlsgd_reg
<< 16);
3641 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[1]);
3643 irel
[0].r_offset
= pos
[0] - info
->contents
;
3644 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELHI
);
3645 irel
[1].r_offset
= pos
[1] - info
->contents
;
3646 irel
[1].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_TPRELLO
);
3653 use_gottprel
= TRUE
;
3655 insn
= (OP_LDQ
<< 26) | (tlsgd_reg
<< 21) | (29 << 16);
3656 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[0]);
3657 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[1]);
3659 irel
[0].r_offset
= pos
[0] - info
->contents
;
3660 irel
[0].r_info
= ELF64_R_INFO (new_symndx
, R_ALPHA_GOTTPREL
);
3661 irel
[1].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3665 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_RDUNIQ
, pos
[2]);
3667 insn
= INSN_ADDQ
| (16 << 21) | (0 << 16) | (0 << 0);
3668 bfd_put_32 (info
->abfd
, (bfd_vma
) insn
, pos
[3]);
3670 bfd_put_32 (info
->abfd
, (bfd_vma
) INSN_UNOP
, pos
[4]);
3672 irel
[2].r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3673 gpdisp
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3675 hint
= elf64_alpha_find_reloc_at_ofs (info
->relocs
, info
->relend
,
3676 irel
[2].r_offset
, R_ALPHA_HINT
);
3678 hint
->r_info
= ELF64_R_INFO (0, R_ALPHA_NONE
);
3680 info
->changed_contents
= TRUE
;
3681 info
->changed_relocs
= TRUE
;
3683 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3684 if (--info
->gotent
->use_count
== 0)
3686 int sz
= alpha_got_entry_size (info
->gotent
->reloc_type
);
3687 alpha_elf_tdata (info
->gotobj
)->total_got_size
-= sz
;
3689 alpha_elf_tdata (info
->gotobj
)->local_got_size
-= sz
;
3692 /* If we've switched to a GOTTPREL relocation, increment the reference
3693 count on that got entry. */
3696 struct alpha_elf_got_entry
*tprel_gotent
;
3698 for (tprel_gotent
= *info
->first_gotent
; tprel_gotent
;
3699 tprel_gotent
= tprel_gotent
->next
)
3700 if (tprel_gotent
->gotobj
== info
->gotobj
3701 && tprel_gotent
->reloc_type
== R_ALPHA_GOTTPREL
3702 && tprel_gotent
->addend
== irel
->r_addend
)
3705 tprel_gotent
->use_count
++;
3708 if (info
->gotent
->use_count
== 0)
3709 tprel_gotent
= info
->gotent
;
3712 tprel_gotent
= (struct alpha_elf_got_entry
*)
3713 bfd_alloc (info
->abfd
, sizeof (struct alpha_elf_got_entry
));
3717 tprel_gotent
->next
= *info
->first_gotent
;
3718 *info
->first_gotent
= tprel_gotent
;
3720 tprel_gotent
->gotobj
= info
->gotobj
;
3721 tprel_gotent
->addend
= irel
->r_addend
;
3722 tprel_gotent
->got_offset
= -1;
3723 tprel_gotent
->reloc_done
= 0;
3724 tprel_gotent
->reloc_xlated
= 0;
3727 tprel_gotent
->use_count
= 1;
3728 tprel_gotent
->reloc_type
= R_ALPHA_GOTTPREL
;
3736 elf64_alpha_relax_section (bfd
*abfd
, asection
*sec
,
3737 struct bfd_link_info
*link_info
, bfd_boolean
*again
)
3739 Elf_Internal_Shdr
*symtab_hdr
;
3740 Elf_Internal_Rela
*internal_relocs
;
3741 Elf_Internal_Rela
*irel
, *irelend
;
3742 Elf_Internal_Sym
*isymbuf
= NULL
;
3743 struct alpha_elf_got_entry
**local_got_entries
;
3744 struct alpha_relax_info info
;
3745 struct alpha_elf_link_hash_table
* htab
;
3748 htab
= alpha_elf_hash_table (link_info
);
3752 /* There's nothing to change, yet. */
3755 if (bfd_link_relocatable (link_info
)
3756 || ((sec
->flags
& (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3757 != (SEC_CODE
| SEC_RELOC
| SEC_ALLOC
))
3758 || sec
->reloc_count
== 0)
3761 BFD_ASSERT (is_alpha_elf (abfd
));
3762 relax_pass
= link_info
->relax_pass
;
3764 /* Make sure our GOT and PLT tables are up-to-date. */
3765 if (htab
->relax_trip
!= link_info
->relax_trip
)
3767 htab
->relax_trip
= link_info
->relax_trip
;
3769 /* This should never fail after the initial round, since the only error
3770 is GOT overflow, and relaxation only shrinks the table. However, we
3771 may only merge got sections during the first pass. If we merge
3772 sections after we've created GPREL relocs, the GP for the merged
3773 section backs up which may put the relocs out of range. */
3774 if (!elf64_alpha_size_got_sections (link_info
, relax_pass
== 0))
3776 if (elf_hash_table (link_info
)->dynamic_sections_created
)
3778 elf64_alpha_size_plt_section (link_info
);
3779 elf64_alpha_size_rela_got_section (link_info
);
3783 symtab_hdr
= &elf_symtab_hdr (abfd
);
3784 local_got_entries
= alpha_elf_tdata(abfd
)->local_got_entries
;
3786 /* Load the relocations for this section. */
3787 internal_relocs
= (_bfd_elf_link_read_relocs
3788 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3789 link_info
->keep_memory
));
3790 if (internal_relocs
== NULL
)
3793 memset(&info
, 0, sizeof (info
));
3796 info
.link_info
= link_info
;
3797 info
.symtab_hdr
= symtab_hdr
;
3798 info
.relocs
= internal_relocs
;
3799 info
.relend
= irelend
= internal_relocs
+ sec
->reloc_count
;
3801 /* Find the GP for this object. Do not store the result back via
3802 _bfd_set_gp_value, since this could change again before final. */
3803 info
.gotobj
= alpha_elf_tdata (abfd
)->gotobj
;
3806 asection
*sgot
= alpha_elf_tdata (info
.gotobj
)->got
;
3807 info
.gp
= (sgot
->output_section
->vma
3808 + sgot
->output_offset
3812 /* Get the section contents. */
3813 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3814 info
.contents
= elf_section_data (sec
)->this_hdr
.contents
;
3817 if (!bfd_malloc_and_get_section (abfd
, sec
, &info
.contents
))
3821 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3824 struct alpha_elf_got_entry
*gotent
;
3825 unsigned long r_type
= ELF64_R_TYPE (irel
->r_info
);
3826 unsigned long r_symndx
= ELF64_R_SYM (irel
->r_info
);
3828 /* Early exit for unhandled or unrelaxable relocations. */
3829 if (r_type
!= R_ALPHA_LITERAL
)
3831 /* We complete everything except LITERAL in the first pass. */
3832 if (relax_pass
!= 0)
3834 if (r_type
== R_ALPHA_TLSLDM
)
3836 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3837 reloc to the STN_UNDEF (0) symbol so that they all match. */
3838 r_symndx
= STN_UNDEF
;
3840 else if (r_type
!= R_ALPHA_GOTDTPREL
3841 && r_type
!= R_ALPHA_GOTTPREL
3842 && r_type
!= R_ALPHA_TLSGD
)
3846 /* Get the value of the symbol referred to by the reloc. */
3847 if (r_symndx
< symtab_hdr
->sh_info
)
3849 /* A local symbol. */
3850 Elf_Internal_Sym
*isym
;
3852 /* Read this BFD's local symbols. */
3853 if (isymbuf
== NULL
)
3855 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3856 if (isymbuf
== NULL
)
3857 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
3858 symtab_hdr
->sh_info
, 0,
3860 if (isymbuf
== NULL
)
3864 isym
= isymbuf
+ r_symndx
;
3866 /* Given the symbol for a TLSLDM reloc is ignored, this also
3867 means forcing the symbol value to the tp base. */
3868 if (r_type
== R_ALPHA_TLSLDM
)
3870 info
.tsec
= bfd_abs_section_ptr
;
3871 symval
= alpha_get_tprel_base (info
.link_info
);
3875 symval
= isym
->st_value
;
3876 if (isym
->st_shndx
== SHN_UNDEF
)
3878 else if (isym
->st_shndx
== SHN_ABS
)
3879 info
.tsec
= bfd_abs_section_ptr
;
3880 else if (isym
->st_shndx
== SHN_COMMON
)
3881 info
.tsec
= bfd_com_section_ptr
;
3883 info
.tsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3887 info
.other
= isym
->st_other
;
3888 if (local_got_entries
)
3889 info
.first_gotent
= &local_got_entries
[r_symndx
];
3892 info
.first_gotent
= &info
.gotent
;
3899 struct alpha_elf_link_hash_entry
*h
;
3901 indx
= r_symndx
- symtab_hdr
->sh_info
;
3902 h
= alpha_elf_sym_hashes (abfd
)[indx
];
3903 BFD_ASSERT (h
!= NULL
);
3905 while (h
->root
.root
.type
== bfd_link_hash_indirect
3906 || h
->root
.root
.type
== bfd_link_hash_warning
)
3907 h
= (struct alpha_elf_link_hash_entry
*)h
->root
.root
.u
.i
.link
;
3909 /* If the symbol is undefined, we can't do anything with it. */
3910 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
3913 /* If the symbol isn't defined in the current module,
3914 again we can't do anything. */
3915 if (h
->root
.root
.type
== bfd_link_hash_undefweak
)
3917 info
.tsec
= bfd_abs_section_ptr
;
3920 else if (!h
->root
.def_regular
)
3922 /* Except for TLSGD relocs, which can sometimes be
3923 relaxed to GOTTPREL relocs. */
3924 if (r_type
!= R_ALPHA_TLSGD
)
3926 info
.tsec
= bfd_abs_section_ptr
;
3931 info
.tsec
= h
->root
.root
.u
.def
.section
;
3932 symval
= h
->root
.root
.u
.def
.value
;
3936 info
.other
= h
->root
.other
;
3937 info
.first_gotent
= &h
->got_entries
;
3940 /* Search for the got entry to be used by this relocation. */
3941 for (gotent
= *info
.first_gotent
; gotent
; gotent
= gotent
->next
)
3942 if (gotent
->gotobj
== info
.gotobj
3943 && gotent
->reloc_type
== r_type
3944 && gotent
->addend
== irel
->r_addend
)
3946 info
.gotent
= gotent
;
3948 symval
+= info
.tsec
->output_section
->vma
+ info
.tsec
->output_offset
;
3949 symval
+= irel
->r_addend
;
3953 case R_ALPHA_LITERAL
:
3954 BFD_ASSERT(info
.gotent
!= NULL
);
3956 /* If there exist LITUSE relocations immediately following, this
3957 opens up all sorts of interesting optimizations, because we
3958 now know every location that this address load is used. */
3959 if (irel
+1 < irelend
3960 && ELF64_R_TYPE (irel
[1].r_info
) == R_ALPHA_LITUSE
)
3962 if (!elf64_alpha_relax_with_lituse (&info
, symval
, irel
))
3967 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3972 case R_ALPHA_GOTDTPREL
:
3973 case R_ALPHA_GOTTPREL
:
3974 BFD_ASSERT(info
.gotent
!= NULL
);
3975 if (!elf64_alpha_relax_got_load (&info
, symval
, irel
, r_type
))
3980 case R_ALPHA_TLSLDM
:
3981 BFD_ASSERT(info
.gotent
!= NULL
);
3982 if (!elf64_alpha_relax_tls_get_addr (&info
, symval
, irel
,
3983 r_type
== R_ALPHA_TLSGD
))
3990 && symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
3992 if (!link_info
->keep_memory
)
3996 /* Cache the symbols for elf_link_input_bfd. */
3997 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
4001 if (info
.contents
!= NULL
4002 && elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4004 if (!info
.changed_contents
&& !link_info
->keep_memory
)
4005 free (info
.contents
);
4008 /* Cache the section contents for elf_link_input_bfd. */
4009 elf_section_data (sec
)->this_hdr
.contents
= info
.contents
;
4013 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
4015 if (!info
.changed_relocs
)
4016 free (internal_relocs
);
4018 elf_section_data (sec
)->relocs
= internal_relocs
;
4021 *again
= info
.changed_contents
|| info
.changed_relocs
;
4026 if (symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
4028 if (elf_section_data (sec
)->this_hdr
.contents
!= info
.contents
)
4029 free (info
.contents
);
4030 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
4031 free (internal_relocs
);
4035 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4036 into the next available slot in SREL. */
4039 elf64_alpha_emit_dynrel (bfd
*abfd
, struct bfd_link_info
*info
,
4040 asection
*sec
, asection
*srel
, bfd_vma offset
,
4041 long dynindx
, long rtype
, bfd_vma addend
)
4043 Elf_Internal_Rela outrel
;
4046 BFD_ASSERT (srel
!= NULL
);
4048 outrel
.r_info
= ELF64_R_INFO (dynindx
, rtype
);
4049 outrel
.r_addend
= addend
;
4051 offset
= _bfd_elf_section_offset (abfd
, info
, sec
, offset
);
4052 if ((offset
| 1) != (bfd_vma
) -1)
4053 outrel
.r_offset
= sec
->output_section
->vma
+ sec
->output_offset
+ offset
;
4055 memset (&outrel
, 0, sizeof (outrel
));
4057 loc
= srel
->contents
;
4058 loc
+= srel
->reloc_count
++ * sizeof (Elf64_External_Rela
);
4059 bfd_elf64_swap_reloca_out (abfd
, &outrel
, loc
);
4060 BFD_ASSERT (sizeof (Elf64_External_Rela
) * srel
->reloc_count
<= srel
->size
);
4063 /* Relocate an Alpha ELF section for a relocatable link.
4065 We don't have to change anything unless the reloc is against a section
4066 symbol, in which case we have to adjust according to where the section
4067 symbol winds up in the output section. */
4070 elf64_alpha_relocate_section_r (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4071 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4072 bfd
*input_bfd
, asection
*input_section
,
4073 bfd_byte
*contents ATTRIBUTE_UNUSED
,
4074 Elf_Internal_Rela
*relocs
,
4075 Elf_Internal_Sym
*local_syms
,
4076 asection
**local_sections
)
4078 unsigned long symtab_hdr_sh_info
;
4079 Elf_Internal_Rela
*rel
;
4080 Elf_Internal_Rela
*relend
;
4081 struct elf_link_hash_entry
**sym_hashes
;
4082 bfd_boolean ret_val
= TRUE
;
4084 symtab_hdr_sh_info
= elf_symtab_hdr (input_bfd
).sh_info
;
4085 sym_hashes
= elf_sym_hashes (input_bfd
);
4087 relend
= relocs
+ input_section
->reloc_count
;
4088 for (rel
= relocs
; rel
< relend
; rel
++)
4090 unsigned long r_symndx
;
4091 Elf_Internal_Sym
*sym
;
4093 unsigned long r_type
;
4095 r_type
= ELF64_R_TYPE (rel
->r_info
);
4096 if (r_type
>= R_ALPHA_max
)
4099 /* xgettext:c-format */
4100 (_("%pB: unsupported relocation type %#x"),
4101 input_bfd
, (int) r_type
);
4102 bfd_set_error (bfd_error_bad_value
);
4107 /* The symbol associated with GPDISP and LITUSE is
4108 immaterial. Only the addend is significant. */
4109 if (r_type
== R_ALPHA_GPDISP
|| r_type
== R_ALPHA_LITUSE
)
4112 r_symndx
= ELF64_R_SYM (rel
->r_info
);
4113 if (r_symndx
< symtab_hdr_sh_info
)
4115 sym
= local_syms
+ r_symndx
;
4116 sec
= local_sections
[r_symndx
];
4120 struct elf_link_hash_entry
*h
;
4122 h
= sym_hashes
[r_symndx
- symtab_hdr_sh_info
];
4124 while (h
->root
.type
== bfd_link_hash_indirect
4125 || h
->root
.type
== bfd_link_hash_warning
)
4126 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4128 if (h
->root
.type
!= bfd_link_hash_defined
4129 && h
->root
.type
!= bfd_link_hash_defweak
)
4133 sec
= h
->root
.u
.def
.section
;
4136 if (sec
!= NULL
&& discarded_section (sec
))
4137 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4139 elf64_alpha_howto_table
+ r_type
, 0,
4142 if (sym
!= NULL
&& ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
4143 rel
->r_addend
+= sec
->output_offset
;
4149 /* Relocate an Alpha ELF section. */
4152 elf64_alpha_relocate_section (bfd
*output_bfd
, struct bfd_link_info
*info
,
4153 bfd
*input_bfd
, asection
*input_section
,
4154 bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
4155 Elf_Internal_Sym
*local_syms
,
4156 asection
**local_sections
)
4158 Elf_Internal_Shdr
*symtab_hdr
;
4159 Elf_Internal_Rela
*rel
;
4160 Elf_Internal_Rela
*relend
;
4161 asection
*sgot
, *srel
, *srelgot
;
4162 bfd
*dynobj
, *gotobj
;
4163 bfd_vma gp
, tp_base
, dtp_base
;
4164 struct alpha_elf_got_entry
**local_got_entries
;
4165 bfd_boolean ret_val
;
4167 BFD_ASSERT (is_alpha_elf (input_bfd
));
4169 /* Handle relocatable links with a smaller loop. */
4170 if (bfd_link_relocatable (info
))
4171 return elf64_alpha_relocate_section_r (output_bfd
, info
, input_bfd
,
4172 input_section
, contents
, relocs
,
4173 local_syms
, local_sections
);
4175 /* This is a final link. */
4179 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
4181 dynobj
= elf_hash_table (info
)->dynobj
;
4182 srelgot
= elf_hash_table (info
)->srelgot
;
4184 if (input_section
->flags
& SEC_ALLOC
)
4186 const char *section_name
;
4187 section_name
= (bfd_elf_string_from_elf_section
4188 (input_bfd
, elf_elfheader(input_bfd
)->e_shstrndx
,
4189 _bfd_elf_single_rel_hdr (input_section
)->sh_name
));
4190 BFD_ASSERT(section_name
!= NULL
);
4191 srel
= bfd_get_linker_section (dynobj
, section_name
);
4196 /* Find the gp value for this input bfd. */
4197 gotobj
= alpha_elf_tdata (input_bfd
)->gotobj
;
4200 sgot
= alpha_elf_tdata (gotobj
)->got
;
4201 gp
= _bfd_get_gp_value (gotobj
);
4204 gp
= (sgot
->output_section
->vma
4205 + sgot
->output_offset
4207 _bfd_set_gp_value (gotobj
, gp
);
4216 local_got_entries
= alpha_elf_tdata(input_bfd
)->local_got_entries
;
4218 if (elf_hash_table (info
)->tls_sec
!= NULL
)
4220 dtp_base
= alpha_get_dtprel_base (info
);
4221 tp_base
= alpha_get_tprel_base (info
);
4224 dtp_base
= tp_base
= 0;
4226 relend
= relocs
+ input_section
->reloc_count
;
4227 for (rel
= relocs
; rel
< relend
; rel
++)
4229 struct alpha_elf_link_hash_entry
*h
= NULL
;
4230 struct alpha_elf_got_entry
*gotent
;
4231 bfd_reloc_status_type r
;
4232 reloc_howto_type
*howto
;
4233 unsigned long r_symndx
;
4234 Elf_Internal_Sym
*sym
= NULL
;
4235 asection
*sec
= NULL
;
4238 bfd_boolean dynamic_symbol_p
;
4239 bfd_boolean unresolved_reloc
= FALSE
;
4240 bfd_boolean undef_weak_ref
= FALSE
;
4241 unsigned long r_type
;
4243 r_type
= ELF64_R_TYPE(rel
->r_info
);
4244 if (r_type
>= R_ALPHA_max
)
4247 /* xgettext:c-format */
4248 (_("%pB: unsupported relocation type %#x"),
4249 input_bfd
, (int) r_type
);
4250 bfd_set_error (bfd_error_bad_value
);
4255 howto
= elf64_alpha_howto_table
+ r_type
;
4256 r_symndx
= ELF64_R_SYM(rel
->r_info
);
4258 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4259 reloc to the STN_UNDEF (0) symbol so that they all match. */
4260 if (r_type
== R_ALPHA_TLSLDM
)
4261 r_symndx
= STN_UNDEF
;
4263 if (r_symndx
< symtab_hdr
->sh_info
)
4266 sym
= local_syms
+ r_symndx
;
4267 sec
= local_sections
[r_symndx
];
4269 value
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &msec
, rel
);
4271 /* If this is a tp-relative relocation against sym STN_UNDEF (0),
4272 this is hackery from relax_section. Force the value to
4273 be the tls module base. */
4274 if (r_symndx
== STN_UNDEF
4275 && (r_type
== R_ALPHA_TLSLDM
4276 || r_type
== R_ALPHA_GOTTPREL
4277 || r_type
== R_ALPHA_TPREL64
4278 || r_type
== R_ALPHA_TPRELHI
4279 || r_type
== R_ALPHA_TPRELLO
4280 || r_type
== R_ALPHA_TPREL16
))
4283 if (local_got_entries
)
4284 gotent
= local_got_entries
[r_symndx
];
4288 /* Need to adjust local GOT entries' addends for SEC_MERGE
4289 unless it has been done already. */
4290 if ((sec
->flags
& SEC_MERGE
)
4291 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
4292 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
4294 && !gotent
->reloc_xlated
)
4296 struct alpha_elf_got_entry
*ent
;
4298 for (ent
= gotent
; ent
; ent
= ent
->next
)
4300 ent
->reloc_xlated
= 1;
4301 if (ent
->use_count
== 0)
4305 _bfd_merged_section_offset (output_bfd
, &msec
,
4306 elf_section_data (sec
)->
4308 sym
->st_value
+ ent
->addend
);
4309 ent
->addend
-= sym
->st_value
;
4310 ent
->addend
+= msec
->output_section
->vma
4311 + msec
->output_offset
4312 - sec
->output_section
->vma
4313 - sec
->output_offset
;
4317 dynamic_symbol_p
= FALSE
;
4321 bfd_boolean warned
, ignored
;
4322 struct elf_link_hash_entry
*hh
;
4323 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
4325 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4326 r_symndx
, symtab_hdr
, sym_hashes
,
4328 unresolved_reloc
, warned
, ignored
);
4334 && ! unresolved_reloc
4335 && hh
->root
.type
== bfd_link_hash_undefweak
)
4336 undef_weak_ref
= TRUE
;
4338 h
= (struct alpha_elf_link_hash_entry
*) hh
;
4339 dynamic_symbol_p
= alpha_elf_dynamic_symbol_p (&h
->root
, info
);
4340 gotent
= h
->got_entries
;
4343 if (sec
!= NULL
&& discarded_section (sec
))
4344 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
4345 rel
, 1, relend
, howto
, 0, contents
);
4347 addend
= rel
->r_addend
;
4350 /* Search for the proper got entry. */
4351 for (; gotent
; gotent
= gotent
->next
)
4352 if (gotent
->gotobj
== gotobj
4353 && gotent
->reloc_type
== r_type
4354 && gotent
->addend
== addend
)
4359 case R_ALPHA_GPDISP
:
4361 bfd_byte
*p_ldah
, *p_lda
;
4363 BFD_ASSERT(gp
!= 0);
4365 value
= (input_section
->output_section
->vma
4366 + input_section
->output_offset
4369 p_ldah
= contents
+ rel
->r_offset
;
4370 p_lda
= p_ldah
+ rel
->r_addend
;
4372 r
= elf64_alpha_do_reloc_gpdisp (input_bfd
, gp
- value
,
4377 case R_ALPHA_LITERAL
:
4378 BFD_ASSERT(sgot
!= NULL
);
4379 BFD_ASSERT(gp
!= 0);
4380 BFD_ASSERT(gotent
!= NULL
);
4381 BFD_ASSERT(gotent
->use_count
>= 1);
4383 if (!gotent
->reloc_done
)
4385 gotent
->reloc_done
= 1;
4387 bfd_put_64 (output_bfd
, value
,
4388 sgot
->contents
+ gotent
->got_offset
);
4390 /* If the symbol has been forced local, output a
4391 RELATIVE reloc, otherwise it will be handled in
4392 finish_dynamic_symbol. */
4393 if (bfd_link_pic (info
)
4394 && !dynamic_symbol_p
4396 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4397 gotent
->got_offset
, 0,
4398 R_ALPHA_RELATIVE
, value
);
4401 value
= (sgot
->output_section
->vma
4402 + sgot
->output_offset
4403 + gotent
->got_offset
);
4407 case R_ALPHA_GPREL32
:
4408 case R_ALPHA_GPREL16
:
4409 case R_ALPHA_GPRELLOW
:
4410 if (dynamic_symbol_p
)
4413 /* xgettext:c-format */
4414 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4415 input_bfd
, h
->root
.root
.root
.string
);
4418 BFD_ASSERT(gp
!= 0);
4422 case R_ALPHA_GPRELHIGH
:
4423 if (dynamic_symbol_p
)
4426 /* xgettext:c-format */
4427 (_("%pB: gp-relative relocation against dynamic symbol %s"),
4428 input_bfd
, h
->root
.root
.root
.string
);
4431 BFD_ASSERT(gp
!= 0);
4433 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4437 /* A call to a dynamic symbol is definitely out of range of
4438 the 16-bit displacement. Don't bother writing anything. */
4439 if (dynamic_symbol_p
)
4444 /* The regular PC-relative stuff measures from the start of
4445 the instruction rather than the end. */
4449 case R_ALPHA_BRADDR
:
4450 if (dynamic_symbol_p
)
4453 /* xgettext:c-format */
4454 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4455 input_bfd
, h
->root
.root
.root
.string
);
4458 /* The regular PC-relative stuff measures from the start of
4459 the instruction rather than the end. */
4468 /* The regular PC-relative stuff measures from the start of
4469 the instruction rather than the end. */
4472 /* The source and destination gp must be the same. Note that
4473 the source will always have an assigned gp, since we forced
4474 one in check_relocs, but that the destination may not, as
4475 it might not have had any relocations at all. Also take
4476 care not to crash if H is an undefined symbol. */
4477 if (h
!= NULL
&& sec
!= NULL
4478 && alpha_elf_tdata (sec
->owner
)->gotobj
4479 && gotobj
!= alpha_elf_tdata (sec
->owner
)->gotobj
)
4482 /* xgettext:c-format */
4483 (_("%pB: change in gp: BRSGP %s"),
4484 input_bfd
, h
->root
.root
.root
.string
);
4488 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4490 other
= h
->root
.other
;
4492 other
= sym
->st_other
;
4493 switch (other
& STO_ALPHA_STD_GPLOAD
)
4495 case STO_ALPHA_NOPV
:
4497 case STO_ALPHA_STD_GPLOAD
:
4502 name
= h
->root
.root
.root
.string
;
4505 name
= (bfd_elf_string_from_elf_section
4506 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4508 name
= _("<unknown>");
4509 else if (name
[0] == 0)
4510 name
= bfd_section_name (sec
);
4513 /* xgettext:c-format */
4514 (_("%pB: !samegp reloc against symbol without .prologue: %s"),
4523 case R_ALPHA_REFLONG
:
4524 case R_ALPHA_REFQUAD
:
4525 case R_ALPHA_DTPREL64
:
4526 case R_ALPHA_TPREL64
:
4528 long dynindx
, dyntype
= r_type
;
4531 /* Careful here to remember RELATIVE relocations for global
4532 variables for symbolic shared objects. */
4534 if (dynamic_symbol_p
)
4536 BFD_ASSERT(h
->root
.dynindx
!= -1);
4537 dynindx
= h
->root
.dynindx
;
4539 addend
= 0, value
= 0;
4541 else if (r_type
== R_ALPHA_DTPREL64
)
4543 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4547 else if (r_type
== R_ALPHA_TPREL64
)
4549 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4550 if (!bfd_link_dll (info
))
4556 dynaddend
= value
- dtp_base
;
4558 else if (bfd_link_pic (info
)
4559 && r_symndx
!= STN_UNDEF
4560 && (input_section
->flags
& SEC_ALLOC
)
4562 && !(unresolved_reloc
4563 && (_bfd_elf_section_offset (output_bfd
, info
,
4568 if (r_type
== R_ALPHA_REFLONG
)
4571 /* xgettext:c-format */
4572 (_("%pB: unhandled dynamic relocation against %s"),
4574 h
->root
.root
.root
.string
);
4578 dyntype
= R_ALPHA_RELATIVE
;
4584 if (input_section
->flags
& SEC_ALLOC
)
4585 elf64_alpha_emit_dynrel (output_bfd
, info
, input_section
,
4586 srel
, rel
->r_offset
, dynindx
,
4587 dyntype
, dynaddend
);
4591 case R_ALPHA_SREL16
:
4592 case R_ALPHA_SREL32
:
4593 case R_ALPHA_SREL64
:
4594 if (dynamic_symbol_p
)
4597 /* xgettext:c-format */
4598 (_("%pB: pc-relative relocation against dynamic symbol %s"),
4599 input_bfd
, h
->root
.root
.root
.string
);
4602 else if (bfd_link_pic (info
)
4606 /* xgettext:c-format */
4607 (_("%pB: pc-relative relocation against undefined weak symbol %s"),
4608 input_bfd
, h
->root
.root
.root
.string
);
4613 /* ??? .eh_frame references to discarded sections will be smashed
4614 to relocations against SHN_UNDEF. The .eh_frame format allows
4615 NULL to be encoded as 0 in any format, so this works here. */
4616 if (r_symndx
== STN_UNDEF
4617 || (unresolved_reloc
4618 && _bfd_elf_section_offset (output_bfd
, info
,
4620 rel
->r_offset
) == (bfd_vma
) -1))
4621 howto
= (elf64_alpha_howto_table
4622 + (r_type
- R_ALPHA_SREL32
+ R_ALPHA_REFLONG
));
4625 case R_ALPHA_TLSLDM
:
4626 /* Ignore the symbol for the relocation. The result is always
4627 the current module. */
4628 dynamic_symbol_p
= 0;
4632 if (!gotent
->reloc_done
)
4634 gotent
->reloc_done
= 1;
4636 /* Note that the module index for the main program is 1. */
4637 bfd_put_64 (output_bfd
,
4638 !bfd_link_pic (info
) && !dynamic_symbol_p
,
4639 sgot
->contents
+ gotent
->got_offset
);
4641 /* If the symbol has been forced local, output a
4642 DTPMOD64 reloc, otherwise it will be handled in
4643 finish_dynamic_symbol. */
4644 if (bfd_link_pic (info
) && !dynamic_symbol_p
)
4645 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4646 gotent
->got_offset
, 0,
4647 R_ALPHA_DTPMOD64
, 0);
4649 if (dynamic_symbol_p
|| r_type
== R_ALPHA_TLSLDM
)
4653 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4656 bfd_put_64 (output_bfd
, value
,
4657 sgot
->contents
+ gotent
->got_offset
+ 8);
4660 value
= (sgot
->output_section
->vma
4661 + sgot
->output_offset
4662 + gotent
->got_offset
);
4666 case R_ALPHA_DTPRELHI
:
4667 case R_ALPHA_DTPRELLO
:
4668 case R_ALPHA_DTPREL16
:
4669 if (dynamic_symbol_p
)
4672 /* xgettext:c-format */
4673 (_("%pB: dtp-relative relocation against dynamic symbol %s"),
4674 input_bfd
, h
->root
.root
.root
.string
);
4677 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4679 if (r_type
== R_ALPHA_DTPRELHI
)
4680 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4683 case R_ALPHA_TPRELHI
:
4684 case R_ALPHA_TPRELLO
:
4685 case R_ALPHA_TPREL16
:
4686 if (bfd_link_dll (info
))
4689 /* xgettext:c-format */
4690 (_("%pB: TLS local exec code cannot be linked into shared objects"),
4694 else if (dynamic_symbol_p
)
4697 /* xgettext:c-format */
4698 (_("%pB: tp-relative relocation against dynamic symbol %s"),
4699 input_bfd
, h
->root
.root
.root
.string
);
4702 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4704 if (r_type
== R_ALPHA_TPRELHI
)
4705 value
= ((bfd_signed_vma
) value
>> 16) + ((value
>> 15) & 1);
4708 case R_ALPHA_GOTDTPREL
:
4709 case R_ALPHA_GOTTPREL
:
4710 BFD_ASSERT(sgot
!= NULL
);
4711 BFD_ASSERT(gp
!= 0);
4712 BFD_ASSERT(gotent
!= NULL
);
4713 BFD_ASSERT(gotent
->use_count
>= 1);
4715 if (!gotent
->reloc_done
)
4717 gotent
->reloc_done
= 1;
4719 if (dynamic_symbol_p
)
4723 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4724 if (r_type
== R_ALPHA_GOTDTPREL
)
4726 else if (bfd_link_executable (info
))
4730 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srelgot
,
4731 gotent
->got_offset
, 0,
4737 bfd_put_64 (output_bfd
, value
,
4738 sgot
->contents
+ gotent
->got_offset
);
4741 value
= (sgot
->output_section
->vma
4742 + sgot
->output_offset
4743 + gotent
->got_offset
);
4749 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4750 contents
, rel
->r_offset
, value
, 0);
4759 case bfd_reloc_overflow
:
4763 /* Don't warn if the overflow is due to pc relative reloc
4764 against discarded section. Section optimization code should
4767 if (r_symndx
< symtab_hdr
->sh_info
4768 && sec
!= NULL
&& howto
->pc_relative
4769 && discarded_section (sec
))
4776 name
= (bfd_elf_string_from_elf_section
4777 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
4781 name
= bfd_section_name (sec
);
4783 (*info
->callbacks
->reloc_overflow
)
4784 (info
, (h
? &h
->root
.root
: NULL
), name
, howto
->name
,
4785 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
4790 case bfd_reloc_outofrange
:
4798 /* Finish up dynamic symbol handling. We set the contents of various
4799 dynamic sections here. */
4802 elf64_alpha_finish_dynamic_symbol (bfd
*output_bfd
, struct bfd_link_info
*info
,
4803 struct elf_link_hash_entry
*h
,
4804 Elf_Internal_Sym
*sym
)
4806 struct alpha_elf_link_hash_entry
*ah
= (struct alpha_elf_link_hash_entry
*)h
;
4810 /* Fill in the .plt entry for this symbol. */
4811 asection
*splt
, *sgot
, *srel
;
4812 Elf_Internal_Rela outrel
;
4814 bfd_vma got_addr
, plt_addr
;
4816 struct alpha_elf_got_entry
*gotent
;
4818 BFD_ASSERT (h
->dynindx
!= -1);
4820 splt
= elf_hash_table (info
)->splt
;
4821 BFD_ASSERT (splt
!= NULL
);
4822 srel
= elf_hash_table (info
)->srelplt
;
4823 BFD_ASSERT (srel
!= NULL
);
4825 for (gotent
= ah
->got_entries
; gotent
; gotent
= gotent
->next
)
4826 if (gotent
->reloc_type
== R_ALPHA_LITERAL
4827 && gotent
->use_count
> 0)
4832 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4833 BFD_ASSERT (sgot
!= NULL
);
4835 BFD_ASSERT (gotent
->got_offset
!= -1);
4836 BFD_ASSERT (gotent
->plt_offset
!= -1);
4838 got_addr
= (sgot
->output_section
->vma
4839 + sgot
->output_offset
4840 + gotent
->got_offset
);
4841 plt_addr
= (splt
->output_section
->vma
4842 + splt
->output_offset
4843 + gotent
->plt_offset
);
4845 plt_index
= (gotent
->plt_offset
-PLT_HEADER_SIZE
) / PLT_ENTRY_SIZE
;
4847 /* Fill in the entry in the procedure linkage table. */
4848 if (elf64_alpha_use_secureplt
)
4850 disp
= (PLT_HEADER_SIZE
- 4) - (gotent
->plt_offset
+ 4);
4851 insn
= INSN_AD (INSN_BR
, 31, disp
);
4852 bfd_put_32 (output_bfd
, insn
,
4853 splt
->contents
+ gotent
->plt_offset
);
4855 plt_index
= ((gotent
->plt_offset
- NEW_PLT_HEADER_SIZE
)
4856 / NEW_PLT_ENTRY_SIZE
);
4860 disp
= -(gotent
->plt_offset
+ 4);
4861 insn
= INSN_AD (INSN_BR
, 28, disp
);
4862 bfd_put_32 (output_bfd
, insn
,
4863 splt
->contents
+ gotent
->plt_offset
);
4864 bfd_put_32 (output_bfd
, INSN_UNOP
,
4865 splt
->contents
+ gotent
->plt_offset
+ 4);
4866 bfd_put_32 (output_bfd
, INSN_UNOP
,
4867 splt
->contents
+ gotent
->plt_offset
+ 8);
4869 plt_index
= ((gotent
->plt_offset
- OLD_PLT_HEADER_SIZE
)
4870 / OLD_PLT_ENTRY_SIZE
);
4873 /* Fill in the entry in the .rela.plt section. */
4874 outrel
.r_offset
= got_addr
;
4875 outrel
.r_info
= ELF64_R_INFO(h
->dynindx
, R_ALPHA_JMP_SLOT
);
4876 outrel
.r_addend
= 0;
4878 loc
= srel
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
4879 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
4881 /* Fill in the entry in the .got. */
4882 bfd_put_64 (output_bfd
, plt_addr
,
4883 sgot
->contents
+ gotent
->got_offset
);
4886 else if (alpha_elf_dynamic_symbol_p (h
, info
))
4888 /* Fill in the dynamic relocations for this symbol's .got entries. */
4890 struct alpha_elf_got_entry
*gotent
;
4892 srel
= elf_hash_table (info
)->srelgot
;
4893 BFD_ASSERT (srel
!= NULL
);
4895 for (gotent
= ((struct alpha_elf_link_hash_entry
*) h
)->got_entries
;
4897 gotent
= gotent
->next
)
4902 if (gotent
->use_count
== 0)
4905 sgot
= alpha_elf_tdata (gotent
->gotobj
)->got
;
4907 r_type
= gotent
->reloc_type
;
4910 case R_ALPHA_LITERAL
:
4911 r_type
= R_ALPHA_GLOB_DAT
;
4914 r_type
= R_ALPHA_DTPMOD64
;
4916 case R_ALPHA_GOTDTPREL
:
4917 r_type
= R_ALPHA_DTPREL64
;
4919 case R_ALPHA_GOTTPREL
:
4920 r_type
= R_ALPHA_TPREL64
;
4922 case R_ALPHA_TLSLDM
:
4927 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4928 gotent
->got_offset
, h
->dynindx
,
4929 r_type
, gotent
->addend
);
4931 if (gotent
->reloc_type
== R_ALPHA_TLSGD
)
4932 elf64_alpha_emit_dynrel (output_bfd
, info
, sgot
, srel
,
4933 gotent
->got_offset
+ 8, h
->dynindx
,
4934 R_ALPHA_DTPREL64
, gotent
->addend
);
4938 /* Mark some specially defined symbols as absolute. */
4939 if (h
== elf_hash_table (info
)->hdynamic
4940 || h
== elf_hash_table (info
)->hgot
4941 || h
== elf_hash_table (info
)->hplt
)
4942 sym
->st_shndx
= SHN_ABS
;
4947 /* Finish up the dynamic sections. */
4950 elf64_alpha_finish_dynamic_sections (bfd
*output_bfd
,
4951 struct bfd_link_info
*info
)
4956 dynobj
= elf_hash_table (info
)->dynobj
;
4957 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4959 if (elf_hash_table (info
)->dynamic_sections_created
)
4961 asection
*splt
, *sgotplt
, *srelaplt
;
4962 Elf64_External_Dyn
*dyncon
, *dynconend
;
4963 bfd_vma plt_vma
, gotplt_vma
;
4965 splt
= elf_hash_table (info
)->splt
;
4966 srelaplt
= elf_hash_table (info
)->srelplt
;
4967 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
4969 plt_vma
= splt
->output_section
->vma
+ splt
->output_offset
;
4972 if (elf64_alpha_use_secureplt
)
4974 sgotplt
= elf_hash_table (info
)->sgotplt
;
4975 BFD_ASSERT (sgotplt
!= NULL
);
4976 if (sgotplt
->size
> 0)
4977 gotplt_vma
= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
4980 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
4981 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4982 for (; dyncon
< dynconend
; dyncon
++)
4984 Elf_Internal_Dyn dyn
;
4986 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4992 = elf64_alpha_use_secureplt
? gotplt_vma
: plt_vma
;
4995 dyn
.d_un
.d_val
= srelaplt
? srelaplt
->size
: 0;
4998 dyn
.d_un
.d_ptr
= srelaplt
? (srelaplt
->output_section
->vma
4999 + srelaplt
->output_offset
) : 0;
5003 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5006 /* Initialize the plt header. */
5012 if (elf64_alpha_use_secureplt
)
5014 ofs
= gotplt_vma
- (plt_vma
+ PLT_HEADER_SIZE
);
5016 insn
= INSN_ABC (INSN_SUBQ
, 27, 28, 25);
5017 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5019 insn
= INSN_ABO (INSN_LDAH
, 28, 28, (ofs
+ 0x8000) >> 16);
5020 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5022 insn
= INSN_ABC (INSN_S4SUBQ
, 25, 25, 25);
5023 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5025 insn
= INSN_ABO (INSN_LDA
, 28, 28, ofs
);
5026 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5028 insn
= INSN_ABO (INSN_LDQ
, 27, 28, 0);
5029 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 16);
5031 insn
= INSN_ABC (INSN_ADDQ
, 25, 25, 25);
5032 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 20);
5034 insn
= INSN_ABO (INSN_LDQ
, 28, 28, 8);
5035 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 24);
5037 insn
= INSN_AB (INSN_JMP
, 31, 27);
5038 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 28);
5040 insn
= INSN_AD (INSN_BR
, 28, -PLT_HEADER_SIZE
);
5041 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 32);
5045 insn
= INSN_AD (INSN_BR
, 27, 0); /* br $27, .+4 */
5046 bfd_put_32 (output_bfd
, insn
, splt
->contents
);
5048 insn
= INSN_ABO (INSN_LDQ
, 27, 27, 12);
5049 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 4);
5052 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 8);
5054 insn
= INSN_AB (INSN_JMP
, 27, 27);
5055 bfd_put_32 (output_bfd
, insn
, splt
->contents
+ 12);
5057 /* The next two words will be filled in by ld.so. */
5058 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 16);
5059 bfd_put_64 (output_bfd
, 0, splt
->contents
+ 24);
5062 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 0;
5069 /* We need to use a special link routine to handle the .mdebug section.
5070 We need to merge all instances of these sections together, not write
5071 them all out sequentially. */
5074 elf64_alpha_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
5077 struct bfd_link_order
*p
;
5078 asection
*mdebug_sec
;
5079 struct ecoff_debug_info debug
;
5080 const struct ecoff_debug_swap
*swap
5081 = get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
5082 HDRR
*symhdr
= &debug
.symbolic_header
;
5083 void * mdebug_handle
= NULL
;
5084 struct alpha_elf_link_hash_table
* htab
;
5086 htab
= alpha_elf_hash_table (info
);
5090 /* Go through the sections and collect the mdebug information. */
5092 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
5094 if (strcmp (o
->name
, ".mdebug") == 0)
5096 struct extsym_info einfo
;
5098 /* We have found the .mdebug section in the output file.
5099 Look through all the link_orders comprising it and merge
5100 the information together. */
5101 symhdr
->magic
= swap
->sym_magic
;
5102 /* FIXME: What should the version stamp be? */
5104 symhdr
->ilineMax
= 0;
5108 symhdr
->isymMax
= 0;
5109 symhdr
->ioptMax
= 0;
5110 symhdr
->iauxMax
= 0;
5112 symhdr
->issExtMax
= 0;
5115 symhdr
->iextMax
= 0;
5117 /* We accumulate the debugging information itself in the
5118 debug_info structure. */
5120 debug
.external_dnr
= NULL
;
5121 debug
.external_pdr
= NULL
;
5122 debug
.external_sym
= NULL
;
5123 debug
.external_opt
= NULL
;
5124 debug
.external_aux
= NULL
;
5126 debug
.ssext
= debug
.ssext_end
= NULL
;
5127 debug
.external_fdr
= NULL
;
5128 debug
.external_rfd
= NULL
;
5129 debug
.external_ext
= debug
.external_ext_end
= NULL
;
5131 mdebug_handle
= bfd_ecoff_debug_init (abfd
, &debug
, swap
, info
);
5132 if (mdebug_handle
== NULL
)
5141 static const char * const name
[] =
5143 ".text", ".init", ".fini", ".data",
5144 ".rodata", ".sdata", ".sbss", ".bss"
5146 static const int sc
[] = { scText
, scInit
, scFini
, scData
,
5147 scRData
, scSData
, scSBss
, scBss
};
5150 esym
.cobol_main
= 0;
5154 esym
.asym
.iss
= issNil
;
5155 esym
.asym
.st
= stLocal
;
5156 esym
.asym
.reserved
= 0;
5157 esym
.asym
.index
= indexNil
;
5158 for (i
= 0; i
< 8; i
++)
5160 esym
.asym
.sc
= sc
[i
];
5161 s
= bfd_get_section_by_name (abfd
, name
[i
]);
5164 esym
.asym
.value
= s
->vma
;
5165 last
= s
->vma
+ s
->size
;
5168 esym
.asym
.value
= last
;
5170 if (! bfd_ecoff_debug_one_external (abfd
, &debug
, swap
,
5176 for (p
= o
->map_head
.link_order
;
5177 p
!= (struct bfd_link_order
*) NULL
;
5180 asection
*input_section
;
5182 const struct ecoff_debug_swap
*input_swap
;
5183 struct ecoff_debug_info input_debug
;
5187 if (p
->type
!= bfd_indirect_link_order
)
5189 if (p
->type
== bfd_data_link_order
)
5194 input_section
= p
->u
.indirect
.section
;
5195 input_bfd
= input_section
->owner
;
5197 if (! is_alpha_elf (input_bfd
))
5198 /* I don't know what a non ALPHA ELF bfd would be
5199 doing with a .mdebug section, but I don't really
5200 want to deal with it. */
5203 input_swap
= (get_elf_backend_data (input_bfd
)
5204 ->elf_backend_ecoff_debug_swap
);
5206 BFD_ASSERT (p
->size
== input_section
->size
);
5208 /* The ECOFF linking code expects that we have already
5209 read in the debugging information and set up an
5210 ecoff_debug_info structure, so we do that now. */
5211 if (!elf64_alpha_read_ecoff_info (input_bfd
, input_section
,
5215 if (! (bfd_ecoff_debug_accumulate
5216 (mdebug_handle
, abfd
, &debug
, swap
, input_bfd
,
5217 &input_debug
, input_swap
, info
)))
5220 /* Loop through the external symbols. For each one with
5221 interesting information, try to find the symbol in
5222 the linker global hash table and save the information
5223 for the output external symbols. */
5224 eraw_src
= (char *) input_debug
.external_ext
;
5225 eraw_end
= (eraw_src
5226 + (input_debug
.symbolic_header
.iextMax
5227 * input_swap
->external_ext_size
));
5229 eraw_src
< eraw_end
;
5230 eraw_src
+= input_swap
->external_ext_size
)
5234 struct alpha_elf_link_hash_entry
*h
;
5236 (*input_swap
->swap_ext_in
) (input_bfd
, eraw_src
, &ext
);
5237 if (ext
.asym
.sc
== scNil
5238 || ext
.asym
.sc
== scUndefined
5239 || ext
.asym
.sc
== scSUndefined
)
5242 name
= input_debug
.ssext
+ ext
.asym
.iss
;
5243 h
= alpha_elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
5244 if (h
== NULL
|| h
->esym
.ifd
!= -2)
5250 < input_debug
.symbolic_header
.ifdMax
);
5251 ext
.ifd
= input_debug
.ifdmap
[ext
.ifd
];
5257 /* Free up the information we just read. */
5258 free (input_debug
.line
);
5259 free (input_debug
.external_dnr
);
5260 free (input_debug
.external_pdr
);
5261 free (input_debug
.external_sym
);
5262 free (input_debug
.external_opt
);
5263 free (input_debug
.external_aux
);
5264 free (input_debug
.ss
);
5265 free (input_debug
.ssext
);
5266 free (input_debug
.external_fdr
);
5267 free (input_debug
.external_rfd
);
5268 free (input_debug
.external_ext
);
5270 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5271 elf_link_input_bfd ignores this section. */
5272 input_section
->flags
&=~ SEC_HAS_CONTENTS
;
5275 /* Build the external symbol information. */
5278 einfo
.debug
= &debug
;
5280 einfo
.failed
= FALSE
;
5281 elf_link_hash_traverse (elf_hash_table (info
),
5282 elf64_alpha_output_extsym
,
5287 /* Set the size of the .mdebug section. */
5288 o
->size
= bfd_ecoff_debug_size (abfd
, &debug
, swap
);
5290 /* Skip this section later on (I don't think this currently
5291 matters, but someday it might). */
5292 o
->map_head
.link_order
= (struct bfd_link_order
*) NULL
;
5298 /* Invoke the regular ELF backend linker to do all the work. */
5299 if (! bfd_elf_final_link (abfd
, info
))
5302 /* Now write out the computed sections. */
5304 /* The .got subsections... */
5306 bfd
*i
, *dynobj
= elf_hash_table(info
)->dynobj
;
5307 for (i
= htab
->got_list
;
5309 i
= alpha_elf_tdata(i
)->got_link_next
)
5313 /* elf_bfd_final_link already did everything in dynobj. */
5317 sgot
= alpha_elf_tdata(i
)->got
;
5318 if (! bfd_set_section_contents (abfd
, sgot
->output_section
,
5320 (file_ptr
) sgot
->output_offset
,
5326 if (mdebug_sec
!= (asection
*) NULL
)
5328 BFD_ASSERT (abfd
->output_has_begun
);
5329 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle
, abfd
, &debug
,
5331 mdebug_sec
->filepos
))
5334 bfd_ecoff_debug_free (mdebug_handle
, abfd
, &debug
, swap
, info
);
5340 static enum elf_reloc_type_class
5341 elf64_alpha_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5342 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5343 const Elf_Internal_Rela
*rela
)
5345 switch ((int) ELF64_R_TYPE (rela
->r_info
))
5347 case R_ALPHA_RELATIVE
:
5348 return reloc_class_relative
;
5349 case R_ALPHA_JMP_SLOT
:
5350 return reloc_class_plt
;
5352 return reloc_class_copy
;
5354 return reloc_class_normal
;
5358 static const struct bfd_elf_special_section elf64_alpha_special_sections
[] =
5360 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5361 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_ALPHA_GPREL
},
5362 { NULL
, 0, 0, 0, 0 }
5365 /* ECOFF swapping routines. These are used when dealing with the
5366 .mdebug section, which is in the ECOFF debugging format. Copied
5367 from elf32-mips.c. */
5368 static const struct ecoff_debug_swap
5369 elf64_alpha_ecoff_debug_swap
=
5371 /* Symbol table magic number. */
5373 /* Alignment of debugging information. E.g., 4. */
5375 /* Sizes of external symbolic information. */
5376 sizeof (struct hdr_ext
),
5377 sizeof (struct dnr_ext
),
5378 sizeof (struct pdr_ext
),
5379 sizeof (struct sym_ext
),
5380 sizeof (struct opt_ext
),
5381 sizeof (struct fdr_ext
),
5382 sizeof (struct rfd_ext
),
5383 sizeof (struct ext_ext
),
5384 /* Functions to swap in external symbolic data. */
5393 _bfd_ecoff_swap_tir_in
,
5394 _bfd_ecoff_swap_rndx_in
,
5395 /* Functions to swap out external symbolic data. */
5404 _bfd_ecoff_swap_tir_out
,
5405 _bfd_ecoff_swap_rndx_out
,
5406 /* Function to read in symbolic data. */
5407 elf64_alpha_read_ecoff_info
5410 /* Use a non-standard hash bucket size of 8. */
5412 static const struct elf_size_info alpha_elf_size_info
=
5414 sizeof (Elf64_External_Ehdr
),
5415 sizeof (Elf64_External_Phdr
),
5416 sizeof (Elf64_External_Shdr
),
5417 sizeof (Elf64_External_Rel
),
5418 sizeof (Elf64_External_Rela
),
5419 sizeof (Elf64_External_Sym
),
5420 sizeof (Elf64_External_Dyn
),
5421 sizeof (Elf_External_Note
),
5425 ELFCLASS64
, EV_CURRENT
,
5426 bfd_elf64_write_out_phdrs
,
5427 bfd_elf64_write_shdrs_and_ehdr
,
5428 bfd_elf64_checksum_contents
,
5429 bfd_elf64_write_relocs
,
5430 bfd_elf64_swap_symbol_in
,
5431 bfd_elf64_swap_symbol_out
,
5432 bfd_elf64_slurp_reloc_table
,
5433 bfd_elf64_slurp_symbol_table
,
5434 bfd_elf64_swap_dyn_in
,
5435 bfd_elf64_swap_dyn_out
,
5436 bfd_elf64_swap_reloc_in
,
5437 bfd_elf64_swap_reloc_out
,
5438 bfd_elf64_swap_reloca_in
,
5439 bfd_elf64_swap_reloca_out
5442 #define TARGET_LITTLE_SYM alpha_elf64_vec
5443 #define TARGET_LITTLE_NAME "elf64-alpha"
5444 #define ELF_ARCH bfd_arch_alpha
5445 #define ELF_TARGET_ID ALPHA_ELF_DATA
5446 #define ELF_MACHINE_CODE EM_ALPHA
5447 #define ELF_MAXPAGESIZE 0x10000
5448 #define ELF_COMMONPAGESIZE 0x2000
5450 #define bfd_elf64_bfd_link_hash_table_create \
5451 elf64_alpha_bfd_link_hash_table_create
5453 #define bfd_elf64_bfd_reloc_type_lookup \
5454 elf64_alpha_bfd_reloc_type_lookup
5455 #define bfd_elf64_bfd_reloc_name_lookup \
5456 elf64_alpha_bfd_reloc_name_lookup
5457 #define elf_info_to_howto \
5458 elf64_alpha_info_to_howto
5460 #define bfd_elf64_mkobject \
5461 elf64_alpha_mkobject
5462 #define elf_backend_object_p \
5463 elf64_alpha_object_p
5465 #define elf_backend_section_from_shdr \
5466 elf64_alpha_section_from_shdr
5467 #define elf_backend_section_flags \
5468 elf64_alpha_section_flags
5469 #define elf_backend_fake_sections \
5470 elf64_alpha_fake_sections
5472 #define bfd_elf64_bfd_is_local_label_name \
5473 elf64_alpha_is_local_label_name
5474 #define bfd_elf64_find_nearest_line \
5475 elf64_alpha_find_nearest_line
5476 #define bfd_elf64_bfd_relax_section \
5477 elf64_alpha_relax_section
5479 #define elf_backend_add_symbol_hook \
5480 elf64_alpha_add_symbol_hook
5481 #define elf_backend_relocs_compatible \
5482 _bfd_elf_relocs_compatible
5483 #define elf_backend_sort_relocs_p \
5484 elf64_alpha_sort_relocs_p
5485 #define elf_backend_check_relocs \
5486 elf64_alpha_check_relocs
5487 #define elf_backend_create_dynamic_sections \
5488 elf64_alpha_create_dynamic_sections
5489 #define elf_backend_adjust_dynamic_symbol \
5490 elf64_alpha_adjust_dynamic_symbol
5491 #define elf_backend_merge_symbol_attribute \
5492 elf64_alpha_merge_symbol_attribute
5493 #define elf_backend_copy_indirect_symbol \
5494 elf64_alpha_copy_indirect_symbol
5495 #define elf_backend_always_size_sections \
5496 elf64_alpha_always_size_sections
5497 #define elf_backend_size_dynamic_sections \
5498 elf64_alpha_size_dynamic_sections
5499 #define elf_backend_omit_section_dynsym \
5500 _bfd_elf_omit_section_dynsym_all
5501 #define elf_backend_relocate_section \
5502 elf64_alpha_relocate_section
5503 #define elf_backend_finish_dynamic_symbol \
5504 elf64_alpha_finish_dynamic_symbol
5505 #define elf_backend_finish_dynamic_sections \
5506 elf64_alpha_finish_dynamic_sections
5507 #define bfd_elf64_bfd_final_link \
5508 elf64_alpha_final_link
5509 #define elf_backend_reloc_type_class \
5510 elf64_alpha_reloc_type_class
5512 #define elf_backend_can_gc_sections 1
5513 #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
5515 #define elf_backend_ecoff_debug_swap \
5516 &elf64_alpha_ecoff_debug_swap
5518 #define elf_backend_size_info \
5521 #define elf_backend_special_sections \
5522 elf64_alpha_special_sections
5524 #define elf_backend_strip_zero_sized_dynamic_sections \
5525 _bfd_elf_strip_zero_sized_dynamic_sections
5527 /* A few constants that determine how the .plt section is set up. */
5528 #define elf_backend_want_got_plt 0
5529 #define elf_backend_plt_readonly 0
5530 #define elf_backend_want_plt_sym 1
5531 #define elf_backend_got_header_size 0
5532 #define elf_backend_dtrel_excludes_plt 1
5534 #include "elf64-target.h"
5536 /* FreeBSD support. */
5538 #undef TARGET_LITTLE_SYM
5539 #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
5540 #undef TARGET_LITTLE_NAME
5541 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5543 #define ELF_OSABI ELFOSABI_FREEBSD
5545 /* The kernel recognizes executables as valid only if they carry a
5546 "FreeBSD" label in the ELF header. So we put this label on all
5547 executables and (for simplicity) also all other object files. */
5550 elf64_alpha_fbsd_init_file_header (bfd
*abfd
, struct bfd_link_info
*info
)
5552 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
5554 if (!_bfd_elf_init_file_header (abfd
, info
))
5557 i_ehdrp
= elf_elfheader (abfd
);
5559 /* Put an ABI label supported by FreeBSD >= 4.1. */
5560 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
5561 #ifdef OLD_FREEBSD_ABI_LABEL
5562 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5563 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5568 #undef elf_backend_init_file_header
5569 #define elf_backend_init_file_header \
5570 elf64_alpha_fbsd_init_file_header
5573 #define elf64_bed elf64_alpha_fbsd_bed
5575 #include "elf64-target.h"