1 /* Alpha specific support for 64-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Contributed by Richard Henderson <rth@tamu.edu>.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22 /* We need a published ABI spec for this. Until one comes out, don't
23 assume this'll remain unchanged forever. */
30 #include "elf/alpha.h"
34 #define NO_COFF_RELOCS
35 #define NO_COFF_SYMBOLS
36 #define NO_COFF_LINENOS
38 /* Get the ECOFF swapping routines. Needed for the debug information. */
39 #include "coff/internal.h"
41 #include "coff/symconst.h"
42 #include "coff/ecoff.h"
43 #include "coff/alpha.h"
48 #include "ecoffswap.h"
51 /* Instruction data for plt generation and relaxation. */
59 #define INSN_LDA (OP_LDA << 26)
60 #define INSN_LDAH (OP_LDAH << 26)
61 #define INSN_LDQ (OP_LDQ << 26)
62 #define INSN_BR (OP_BR << 26)
64 #define INSN_ADDQ 0x40000400
65 #define INSN_RDUNIQ 0x0000009e
66 #define INSN_SUBQ 0x40000520
67 #define INSN_S4SUBQ 0x40000560
68 #define INSN_UNOP 0x2ffe0000
70 #define INSN_JSR 0x68004000
71 #define INSN_JMP 0x68000000
72 #define INSN_JSR_MASK 0xfc00c000
74 #define INSN_A(I,A) (I | (A << 21))
75 #define INSN_AB(I,A,B) (I | (A << 21) | (B << 16))
76 #define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C)
77 #define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff))
78 #define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff))
82 /* Set by ld emulation. Putting this into the link_info or hash structure
83 is simply working too hard. */
85 bfd_boolean elf64_alpha_use_secureplt = TRUE;
87 bfd_boolean elf64_alpha_use_secureplt = FALSE;
90 #define OLD_PLT_HEADER_SIZE 32
91 #define OLD_PLT_ENTRY_SIZE 12
92 #define NEW_PLT_HEADER_SIZE 36
93 #define NEW_PLT_ENTRY_SIZE 4
95 #define PLT_HEADER_SIZE \
96 (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
97 #define PLT_ENTRY_SIZE \
98 (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
100 #define MAX_GOT_SIZE (64*1024)
102 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
104 struct alpha_elf_link_hash_entry
106 struct elf_link_hash_entry root;
108 /* External symbol information. */
111 /* Cumulative flags for all the .got entries. */
114 /* Contexts in which a literal was referenced. */
115 #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
116 #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
117 #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
118 #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
119 #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
120 #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
121 #define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
122 #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
123 #define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
125 /* Used to implement multiple .got subsections. */
126 struct alpha_elf_got_entry
128 struct alpha_elf_got_entry *next;
130 /* Which .got subsection? */
133 /* The addend in effect for this entry. */
136 /* The .got offset for this entry. */
139 /* The .plt offset for this entry. */
142 /* How many references to this entry? */
145 /* The relocation type of this entry. */
146 unsigned char reloc_type;
148 /* How a LITERAL is used. */
151 /* Have we initialized the dynamic relocation for this entry? */
152 unsigned char reloc_done;
154 /* Have we adjusted this entry for SEC_MERGE? */
155 unsigned char reloc_xlated;
158 /* Used to count non-got, non-plt relocations for delayed sizing
159 of relocation sections. */
160 struct alpha_elf_reloc_entry
162 struct alpha_elf_reloc_entry *next;
164 /* Which .reloc section? */
167 /* What kind of relocation? */
170 /* Is this against read-only section? */
171 unsigned int reltext : 1;
173 /* How many did we find? */
178 /* Alpha ELF linker hash table. */
180 struct alpha_elf_link_hash_table
182 struct elf_link_hash_table root;
184 /* The head of a list of .got subsections linked through
185 alpha_elf_tdata(abfd)->got_link_next. */
189 /* Look up an entry in a Alpha ELF linker hash table. */
191 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
192 ((struct alpha_elf_link_hash_entry *) \
193 elf_link_hash_lookup (&(table)->root, (string), (create), \
196 /* Traverse a Alpha ELF linker hash table. */
198 #define alpha_elf_link_hash_traverse(table, func, info) \
199 (elf_link_hash_traverse \
201 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
204 /* Get the Alpha ELF linker hash table from a link_info structure. */
206 #define alpha_elf_hash_table(p) \
207 ((struct alpha_elf_link_hash_table *) ((p)->hash))
209 /* Get the object's symbols as our own entry type. */
211 #define alpha_elf_sym_hashes(abfd) \
212 ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
214 /* Should we do dynamic things to this symbol? This differs from the
215 generic version in that we never need to consider function pointer
216 equality wrt PLT entries -- we don't create a PLT entry if a symbol's
217 address is ever taken. */
219 static inline bfd_boolean
220 alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h,
221 struct bfd_link_info *info)
223 return _bfd_elf_dynamic_symbol_p (h, info, 0);
226 /* Create an entry in a Alpha ELF linker hash table. */
228 static struct bfd_hash_entry *
229 elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry,
230 struct bfd_hash_table *table,
233 struct alpha_elf_link_hash_entry *ret =
234 (struct alpha_elf_link_hash_entry *) entry;
236 /* Allocate the structure if it has not already been allocated by a
238 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
239 ret = ((struct alpha_elf_link_hash_entry *)
240 bfd_hash_allocate (table,
241 sizeof (struct alpha_elf_link_hash_entry)));
242 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
243 return (struct bfd_hash_entry *) ret;
245 /* Call the allocation method of the superclass. */
246 ret = ((struct alpha_elf_link_hash_entry *)
247 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
249 if (ret != (struct alpha_elf_link_hash_entry *) NULL)
251 /* Set local fields. */
252 memset (&ret->esym, 0, sizeof (EXTR));
253 /* We use -2 as a marker to indicate that the information has
254 not been set. -1 means there is no associated ifd. */
257 ret->got_entries = NULL;
258 ret->reloc_entries = NULL;
261 return (struct bfd_hash_entry *) ret;
264 /* Create a Alpha ELF linker hash table. */
266 static struct bfd_link_hash_table *
267 elf64_alpha_bfd_link_hash_table_create (bfd *abfd)
269 struct alpha_elf_link_hash_table *ret;
270 bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table);
272 ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt);
273 if (ret == (struct alpha_elf_link_hash_table *) NULL)
276 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
277 elf64_alpha_link_hash_newfunc))
283 return &ret->root.root;
286 /* We have some private fields hanging off of the elf_tdata structure. */
288 struct alpha_elf_obj_tdata
290 struct elf_obj_tdata root;
292 /* For every input file, these are the got entries for that object's
294 struct alpha_elf_got_entry ** local_got_entries;
296 /* For every input file, this is the object that owns the got that
297 this input file uses. */
300 /* For every got, this is a linked list through the objects using this got */
301 bfd *in_got_link_next;
303 /* For every got, this is a link to the next got subsegment. */
306 /* For every got, this is the section. */
309 /* For every got, this is it's total number of words. */
312 /* For every got, this is the sum of the number of words required
313 to hold all of the member object's local got. */
317 #define alpha_elf_tdata(abfd) \
318 ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
321 elf64_alpha_mkobject (bfd *abfd)
323 bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata);
324 abfd->tdata.any = bfd_zalloc (abfd, amt);
325 if (abfd->tdata.any == NULL)
331 elf64_alpha_object_p (bfd *abfd)
333 /* Set the right machine number for an Alpha ELF file. */
334 return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
337 /* A relocation function which doesn't do anything. */
339 static bfd_reloc_status_type
340 elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
341 asymbol *sym ATTRIBUTE_UNUSED,
342 PTR data ATTRIBUTE_UNUSED, asection *sec,
343 bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
346 reloc->address += sec->output_offset;
350 /* A relocation function used for an unsupported reloc. */
352 static bfd_reloc_status_type
353 elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
354 asymbol *sym ATTRIBUTE_UNUSED,
355 PTR data ATTRIBUTE_UNUSED, asection *sec,
356 bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
359 reloc->address += sec->output_offset;
360 return bfd_reloc_notsupported;
363 /* Do the work of the GPDISP relocation. */
365 static bfd_reloc_status_type
366 elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah,
369 bfd_reloc_status_type ret = bfd_reloc_ok;
371 unsigned long i_ldah, i_lda;
373 i_ldah = bfd_get_32 (abfd, p_ldah);
374 i_lda = bfd_get_32 (abfd, p_lda);
376 /* Complain if the instructions are not correct. */
377 if (((i_ldah >> 26) & 0x3f) != 0x09
378 || ((i_lda >> 26) & 0x3f) != 0x08)
379 ret = bfd_reloc_dangerous;
381 /* Extract the user-supplied offset, mirroring the sign extensions
382 that the instructions perform. */
383 addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
384 addend = (addend ^ 0x80008000) - 0x80008000;
388 if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
389 || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
390 ret = bfd_reloc_overflow;
392 /* compensate for the sign extension again. */
393 i_ldah = ((i_ldah & 0xffff0000)
394 | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
395 i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
397 bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
398 bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
403 /* The special function for the GPDISP reloc. */
405 static bfd_reloc_status_type
406 elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry,
407 asymbol *sym ATTRIBUTE_UNUSED, PTR data,
408 asection *input_section, bfd *output_bfd,
411 bfd_reloc_status_type ret;
412 bfd_vma gp, relocation;
413 bfd_vma high_address;
414 bfd_byte *p_ldah, *p_lda;
416 /* Don't do anything if we're not doing a final link. */
419 reloc_entry->address += input_section->output_offset;
423 high_address = bfd_get_section_limit (abfd, input_section);
424 if (reloc_entry->address > high_address
425 || reloc_entry->address + reloc_entry->addend > high_address)
426 return bfd_reloc_outofrange;
428 /* The gp used in the portion of the output object to which this
429 input object belongs is cached on the input bfd. */
430 gp = _bfd_get_gp_value (abfd);
432 relocation = (input_section->output_section->vma
433 + input_section->output_offset
434 + reloc_entry->address);
436 p_ldah = (bfd_byte *) data + reloc_entry->address;
437 p_lda = p_ldah + reloc_entry->addend;
439 ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
441 /* Complain if the instructions are not correct. */
442 if (ret == bfd_reloc_dangerous)
443 *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
448 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
449 from smaller values. Start with zero, widen, *then* decrement. */
450 #define MINUS_ONE (((bfd_vma)0) - 1)
452 #define SKIP_HOWTO(N) \
453 HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
455 static reloc_howto_type elf64_alpha_howto_table[] =
457 HOWTO (R_ALPHA_NONE, /* type */
459 0, /* size (0 = byte, 1 = short, 2 = long) */
461 TRUE, /* pc_relative */
463 complain_overflow_dont, /* complain_on_overflow */
464 elf64_alpha_reloc_nil, /* special_function */
466 FALSE, /* partial_inplace */
469 TRUE), /* pcrel_offset */
471 /* A 32 bit reference to a symbol. */
472 HOWTO (R_ALPHA_REFLONG, /* type */
474 2, /* size (0 = byte, 1 = short, 2 = long) */
476 FALSE, /* pc_relative */
478 complain_overflow_bitfield, /* complain_on_overflow */
479 0, /* special_function */
480 "REFLONG", /* name */
481 FALSE, /* partial_inplace */
482 0xffffffff, /* src_mask */
483 0xffffffff, /* dst_mask */
484 FALSE), /* pcrel_offset */
486 /* A 64 bit reference to a symbol. */
487 HOWTO (R_ALPHA_REFQUAD, /* type */
489 4, /* size (0 = byte, 1 = short, 2 = long) */
491 FALSE, /* pc_relative */
493 complain_overflow_bitfield, /* complain_on_overflow */
494 0, /* special_function */
495 "REFQUAD", /* name */
496 FALSE, /* partial_inplace */
497 MINUS_ONE, /* src_mask */
498 MINUS_ONE, /* dst_mask */
499 FALSE), /* pcrel_offset */
501 /* A 32 bit GP relative offset. This is just like REFLONG except
502 that when the value is used the value of the gp register will be
504 HOWTO (R_ALPHA_GPREL32, /* type */
506 2, /* size (0 = byte, 1 = short, 2 = long) */
508 FALSE, /* pc_relative */
510 complain_overflow_bitfield, /* complain_on_overflow */
511 0, /* special_function */
512 "GPREL32", /* name */
513 FALSE, /* partial_inplace */
514 0xffffffff, /* src_mask */
515 0xffffffff, /* dst_mask */
516 FALSE), /* pcrel_offset */
518 /* Used for an instruction that refers to memory off the GP register. */
519 HOWTO (R_ALPHA_LITERAL, /* type */
521 1, /* size (0 = byte, 1 = short, 2 = long) */
523 FALSE, /* pc_relative */
525 complain_overflow_signed, /* complain_on_overflow */
526 0, /* special_function */
527 "ELF_LITERAL", /* name */
528 FALSE, /* partial_inplace */
529 0xffff, /* src_mask */
530 0xffff, /* dst_mask */
531 FALSE), /* pcrel_offset */
533 /* This reloc only appears immediately following an ELF_LITERAL reloc.
534 It identifies a use of the literal. The symbol index is special:
535 1 means the literal address is in the base register of a memory
536 format instruction; 2 means the literal address is in the byte
537 offset register of a byte-manipulation instruction; 3 means the
538 literal address is in the target register of a jsr instruction.
539 This does not actually do any relocation. */
540 HOWTO (R_ALPHA_LITUSE, /* type */
542 1, /* size (0 = byte, 1 = short, 2 = long) */
544 FALSE, /* pc_relative */
546 complain_overflow_dont, /* complain_on_overflow */
547 elf64_alpha_reloc_nil, /* special_function */
549 FALSE, /* partial_inplace */
552 FALSE), /* pcrel_offset */
554 /* Load the gp register. This is always used for a ldah instruction
555 which loads the upper 16 bits of the gp register. The symbol
556 index of the GPDISP instruction is an offset in bytes to the lda
557 instruction that loads the lower 16 bits. The value to use for
558 the relocation is the difference between the GP value and the
559 current location; the load will always be done against a register
560 holding the current address.
562 NOTE: Unlike ECOFF, partial in-place relocation is not done. If
563 any offset is present in the instructions, it is an offset from
564 the register to the ldah instruction. This lets us avoid any
565 stupid hackery like inventing a gp value to do partial relocation
566 against. Also unlike ECOFF, we do the whole relocation off of
567 the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
568 space consuming bit, that, since all the information was present
569 in the GPDISP_HI16 reloc. */
570 HOWTO (R_ALPHA_GPDISP, /* type */
572 2, /* size (0 = byte, 1 = short, 2 = long) */
574 FALSE, /* pc_relative */
576 complain_overflow_dont, /* complain_on_overflow */
577 elf64_alpha_reloc_gpdisp, /* special_function */
579 FALSE, /* partial_inplace */
580 0xffff, /* src_mask */
581 0xffff, /* dst_mask */
582 TRUE), /* pcrel_offset */
584 /* A 21 bit branch. */
585 HOWTO (R_ALPHA_BRADDR, /* type */
587 2, /* size (0 = byte, 1 = short, 2 = long) */
589 TRUE, /* pc_relative */
591 complain_overflow_signed, /* complain_on_overflow */
592 0, /* special_function */
594 FALSE, /* partial_inplace */
595 0x1fffff, /* src_mask */
596 0x1fffff, /* dst_mask */
597 TRUE), /* pcrel_offset */
599 /* A hint for a jump to a register. */
600 HOWTO (R_ALPHA_HINT, /* type */
602 1, /* size (0 = byte, 1 = short, 2 = long) */
604 TRUE, /* pc_relative */
606 complain_overflow_dont, /* complain_on_overflow */
607 0, /* special_function */
609 FALSE, /* partial_inplace */
610 0x3fff, /* src_mask */
611 0x3fff, /* dst_mask */
612 TRUE), /* pcrel_offset */
614 /* 16 bit PC relative offset. */
615 HOWTO (R_ALPHA_SREL16, /* type */
617 1, /* size (0 = byte, 1 = short, 2 = long) */
619 TRUE, /* pc_relative */
621 complain_overflow_signed, /* complain_on_overflow */
622 0, /* special_function */
624 FALSE, /* partial_inplace */
625 0xffff, /* src_mask */
626 0xffff, /* dst_mask */
627 TRUE), /* pcrel_offset */
629 /* 32 bit PC relative offset. */
630 HOWTO (R_ALPHA_SREL32, /* type */
632 2, /* size (0 = byte, 1 = short, 2 = long) */
634 TRUE, /* pc_relative */
636 complain_overflow_signed, /* complain_on_overflow */
637 0, /* special_function */
639 FALSE, /* partial_inplace */
640 0xffffffff, /* src_mask */
641 0xffffffff, /* dst_mask */
642 TRUE), /* pcrel_offset */
644 /* A 64 bit PC relative offset. */
645 HOWTO (R_ALPHA_SREL64, /* type */
647 4, /* size (0 = byte, 1 = short, 2 = long) */
649 TRUE, /* pc_relative */
651 complain_overflow_signed, /* complain_on_overflow */
652 0, /* special_function */
654 FALSE, /* partial_inplace */
655 MINUS_ONE, /* src_mask */
656 MINUS_ONE, /* dst_mask */
657 TRUE), /* pcrel_offset */
659 /* Skip 12 - 16; deprecated ECOFF relocs. */
666 /* The high 16 bits of the displacement from GP to the target. */
667 HOWTO (R_ALPHA_GPRELHIGH,
669 1, /* size (0 = byte, 1 = short, 2 = long) */
671 FALSE, /* pc_relative */
673 complain_overflow_signed, /* complain_on_overflow */
674 0, /* special_function */
675 "GPRELHIGH", /* name */
676 FALSE, /* partial_inplace */
677 0xffff, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
681 /* The low 16 bits of the displacement from GP to the target. */
682 HOWTO (R_ALPHA_GPRELLOW,
684 1, /* size (0 = byte, 1 = short, 2 = long) */
686 FALSE, /* pc_relative */
688 complain_overflow_dont, /* complain_on_overflow */
689 0, /* special_function */
690 "GPRELLOW", /* name */
691 FALSE, /* partial_inplace */
692 0xffff, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
696 /* A 16-bit displacement from the GP to the target. */
697 HOWTO (R_ALPHA_GPREL16,
699 1, /* size (0 = byte, 1 = short, 2 = long) */
701 FALSE, /* pc_relative */
703 complain_overflow_signed, /* complain_on_overflow */
704 0, /* special_function */
705 "GPREL16", /* name */
706 FALSE, /* partial_inplace */
707 0xffff, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
711 /* Skip 20 - 23; deprecated ECOFF relocs. */
717 /* Misc ELF relocations. */
719 /* A dynamic relocation to copy the target into our .dynbss section. */
720 /* Not generated, as all Alpha objects use PIC, so it is not needed. It
721 is present because every other ELF has one, but should not be used
722 because .dynbss is an ugly thing. */
729 complain_overflow_dont,
730 bfd_elf_generic_reloc,
737 /* A dynamic relocation for a .got entry. */
738 HOWTO (R_ALPHA_GLOB_DAT,
744 complain_overflow_dont,
745 bfd_elf_generic_reloc,
752 /* A dynamic relocation for a .plt entry. */
753 HOWTO (R_ALPHA_JMP_SLOT,
759 complain_overflow_dont,
760 bfd_elf_generic_reloc,
767 /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
768 HOWTO (R_ALPHA_RELATIVE,
774 complain_overflow_dont,
775 bfd_elf_generic_reloc,
782 /* A 21 bit branch that adjusts for gp loads. */
783 HOWTO (R_ALPHA_BRSGP, /* type */
785 2, /* size (0 = byte, 1 = short, 2 = long) */
787 TRUE, /* pc_relative */
789 complain_overflow_signed, /* complain_on_overflow */
790 0, /* special_function */
792 FALSE, /* partial_inplace */
793 0x1fffff, /* src_mask */
794 0x1fffff, /* dst_mask */
795 TRUE), /* pcrel_offset */
797 /* Creates a tls_index for the symbol in the got. */
798 HOWTO (R_ALPHA_TLSGD, /* type */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
802 FALSE, /* pc_relative */
804 complain_overflow_signed, /* complain_on_overflow */
805 0, /* special_function */
807 FALSE, /* partial_inplace */
808 0xffff, /* src_mask */
809 0xffff, /* dst_mask */
810 FALSE), /* pcrel_offset */
812 /* Creates a tls_index for the (current) module in the got. */
813 HOWTO (R_ALPHA_TLSLDM, /* type */
815 1, /* size (0 = byte, 1 = short, 2 = long) */
817 FALSE, /* pc_relative */
819 complain_overflow_signed, /* complain_on_overflow */
820 0, /* special_function */
822 FALSE, /* partial_inplace */
823 0xffff, /* src_mask */
824 0xffff, /* dst_mask */
825 FALSE), /* pcrel_offset */
827 /* A dynamic relocation for a DTP module entry. */
828 HOWTO (R_ALPHA_DTPMOD64, /* type */
830 4, /* size (0 = byte, 1 = short, 2 = long) */
832 FALSE, /* pc_relative */
834 complain_overflow_bitfield, /* complain_on_overflow */
835 0, /* special_function */
836 "DTPMOD64", /* name */
837 FALSE, /* partial_inplace */
838 MINUS_ONE, /* src_mask */
839 MINUS_ONE, /* dst_mask */
840 FALSE), /* pcrel_offset */
842 /* Creates a 64-bit offset in the got for the displacement
843 from DTP to the target. */
844 HOWTO (R_ALPHA_GOTDTPREL, /* type */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
848 FALSE, /* pc_relative */
850 complain_overflow_signed, /* complain_on_overflow */
851 0, /* special_function */
852 "GOTDTPREL", /* name */
853 FALSE, /* partial_inplace */
854 0xffff, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
858 /* A dynamic relocation for a displacement from DTP to the target. */
859 HOWTO (R_ALPHA_DTPREL64, /* type */
861 4, /* size (0 = byte, 1 = short, 2 = long) */
863 FALSE, /* pc_relative */
865 complain_overflow_bitfield, /* complain_on_overflow */
866 0, /* special_function */
867 "DTPREL64", /* name */
868 FALSE, /* partial_inplace */
869 MINUS_ONE, /* src_mask */
870 MINUS_ONE, /* dst_mask */
871 FALSE), /* pcrel_offset */
873 /* The high 16 bits of the displacement from DTP to the target. */
874 HOWTO (R_ALPHA_DTPRELHI, /* type */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
878 FALSE, /* pc_relative */
880 complain_overflow_signed, /* complain_on_overflow */
881 0, /* special_function */
882 "DTPRELHI", /* name */
883 FALSE, /* partial_inplace */
884 0xffff, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
888 /* The low 16 bits of the displacement from DTP to the target. */
889 HOWTO (R_ALPHA_DTPRELLO, /* type */
891 1, /* size (0 = byte, 1 = short, 2 = long) */
893 FALSE, /* pc_relative */
895 complain_overflow_dont, /* complain_on_overflow */
896 0, /* special_function */
897 "DTPRELLO", /* name */
898 FALSE, /* partial_inplace */
899 0xffff, /* src_mask */
900 0xffff, /* dst_mask */
901 FALSE), /* pcrel_offset */
903 /* A 16-bit displacement from DTP to the target. */
904 HOWTO (R_ALPHA_DTPREL16, /* type */
906 1, /* size (0 = byte, 1 = short, 2 = long) */
908 FALSE, /* pc_relative */
910 complain_overflow_signed, /* complain_on_overflow */
911 0, /* special_function */
912 "DTPREL16", /* name */
913 FALSE, /* partial_inplace */
914 0xffff, /* src_mask */
915 0xffff, /* dst_mask */
916 FALSE), /* pcrel_offset */
918 /* Creates a 64-bit offset in the got for the displacement
919 from TP to the target. */
920 HOWTO (R_ALPHA_GOTTPREL, /* type */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
924 FALSE, /* pc_relative */
926 complain_overflow_signed, /* complain_on_overflow */
927 0, /* special_function */
928 "GOTTPREL", /* name */
929 FALSE, /* partial_inplace */
930 0xffff, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE), /* pcrel_offset */
934 /* A dynamic relocation for a displacement from TP to the target. */
935 HOWTO (R_ALPHA_TPREL64, /* type */
937 4, /* size (0 = byte, 1 = short, 2 = long) */
939 FALSE, /* pc_relative */
941 complain_overflow_bitfield, /* complain_on_overflow */
942 0, /* special_function */
943 "TPREL64", /* name */
944 FALSE, /* partial_inplace */
945 MINUS_ONE, /* src_mask */
946 MINUS_ONE, /* dst_mask */
947 FALSE), /* pcrel_offset */
949 /* The high 16 bits of the displacement from TP to the target. */
950 HOWTO (R_ALPHA_TPRELHI, /* type */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
954 FALSE, /* pc_relative */
956 complain_overflow_signed, /* complain_on_overflow */
957 0, /* special_function */
958 "TPRELHI", /* name */
959 FALSE, /* partial_inplace */
960 0xffff, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
964 /* The low 16 bits of the displacement from TP to the target. */
965 HOWTO (R_ALPHA_TPRELLO, /* type */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
969 FALSE, /* pc_relative */
971 complain_overflow_dont, /* complain_on_overflow */
972 0, /* special_function */
973 "TPRELLO", /* name */
974 FALSE, /* partial_inplace */
975 0xffff, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
979 /* A 16-bit displacement from TP to the target. */
980 HOWTO (R_ALPHA_TPREL16, /* type */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
984 FALSE, /* pc_relative */
986 complain_overflow_signed, /* complain_on_overflow */
987 0, /* special_function */
988 "TPREL16", /* name */
989 FALSE, /* partial_inplace */
990 0xffff, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
995 /* A mapping from BFD reloc types to Alpha ELF reloc types. */
999 bfd_reloc_code_real_type bfd_reloc_val;
1003 static const struct elf_reloc_map elf64_alpha_reloc_map[] =
1005 {BFD_RELOC_NONE, R_ALPHA_NONE},
1006 {BFD_RELOC_32, R_ALPHA_REFLONG},
1007 {BFD_RELOC_64, R_ALPHA_REFQUAD},
1008 {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
1009 {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
1010 {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
1011 {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
1012 {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
1013 {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
1014 {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
1015 {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
1016 {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
1017 {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
1018 {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
1019 {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
1020 {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
1021 {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
1022 {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
1023 {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
1024 {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
1025 {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
1026 {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
1027 {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
1028 {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
1029 {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
1030 {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
1031 {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
1032 {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
1033 {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
1034 {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
1037 /* Given a BFD reloc type, return a HOWTO structure. */
1039 static reloc_howto_type *
1040 elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1041 bfd_reloc_code_real_type code)
1043 const struct elf_reloc_map *i, *e;
1044 i = e = elf64_alpha_reloc_map;
1045 e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
1048 if (i->bfd_reloc_val == code)
1049 return &elf64_alpha_howto_table[i->elf_reloc_val];
1054 /* Given an Alpha ELF reloc type, fill in an arelent structure. */
1057 elf64_alpha_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
1058 Elf_Internal_Rela *dst)
1060 unsigned r_type = ELF64_R_TYPE(dst->r_info);
1061 BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
1062 cache_ptr->howto = &elf64_alpha_howto_table[r_type];
1065 /* These two relocations create a two-word entry in the got. */
1066 #define alpha_got_entry_size(r_type) \
1067 (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
1069 /* This is PT_TLS segment p_vaddr. */
1070 #define alpha_get_dtprel_base(info) \
1071 (elf_hash_table (info)->tls_sec->vma)
1073 /* Main program TLS (whose template starts at PT_TLS p_vaddr)
1074 is assigned offset round(16, PT_TLS p_align). */
1075 #define alpha_get_tprel_base(info) \
1076 (elf_hash_table (info)->tls_sec->vma \
1077 - align_power ((bfd_vma) 16, \
1078 elf_hash_table (info)->tls_sec->alignment_power))
1080 /* Handle an Alpha specific section when reading an object file. This
1081 is called when bfd_section_from_shdr finds a section with an unknown
1083 FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
1087 elf64_alpha_section_from_shdr (bfd *abfd,
1088 Elf_Internal_Shdr *hdr,
1094 /* There ought to be a place to keep ELF backend specific flags, but
1095 at the moment there isn't one. We just keep track of the
1096 sections by their name, instead. Fortunately, the ABI gives
1097 suggested names for all the MIPS specific sections, so we will
1098 probably get away with this. */
1099 switch (hdr->sh_type)
1101 case SHT_ALPHA_DEBUG:
1102 if (strcmp (name, ".mdebug") != 0)
1109 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1111 newsect = hdr->bfd_section;
1113 if (hdr->sh_type == SHT_ALPHA_DEBUG)
1115 if (! bfd_set_section_flags (abfd, newsect,
1116 (bfd_get_section_flags (abfd, newsect)
1124 /* Convert Alpha specific section flags to bfd internal section flags. */
1127 elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
1129 if (hdr->sh_flags & SHF_ALPHA_GPREL)
1130 *flags |= SEC_SMALL_DATA;
1135 /* Set the correct type for an Alpha ELF section. We do this by the
1136 section name, which is a hack, but ought to work. */
1139 elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
1141 register const char *name;
1143 name = bfd_get_section_name (abfd, sec);
1145 if (strcmp (name, ".mdebug") == 0)
1147 hdr->sh_type = SHT_ALPHA_DEBUG;
1148 /* In a shared object on Irix 5.3, the .mdebug section has an
1149 entsize of 0. FIXME: Does this matter? */
1150 if ((abfd->flags & DYNAMIC) != 0 )
1151 hdr->sh_entsize = 0;
1153 hdr->sh_entsize = 1;
1155 else if ((sec->flags & SEC_SMALL_DATA)
1156 || strcmp (name, ".sdata") == 0
1157 || strcmp (name, ".sbss") == 0
1158 || strcmp (name, ".lit4") == 0
1159 || strcmp (name, ".lit8") == 0)
1160 hdr->sh_flags |= SHF_ALPHA_GPREL;
1165 /* Hook called by the linker routine which adds symbols from an object
1166 file. We use it to put .comm items in .sbss, and not .bss. */
1169 elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
1170 Elf_Internal_Sym *sym,
1171 const char **namep ATTRIBUTE_UNUSED,
1172 flagword *flagsp ATTRIBUTE_UNUSED,
1173 asection **secp, bfd_vma *valp)
1175 if (sym->st_shndx == SHN_COMMON
1176 && !info->relocatable
1177 && sym->st_size <= elf_gp_size (abfd))
1179 /* Common symbols less than or equal to -G nn bytes are
1180 automatically put into .sbss. */
1182 asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
1186 scomm = bfd_make_section_with_flags (abfd, ".scommon",
1189 | SEC_LINKER_CREATED));
1195 *valp = sym->st_size;
1201 /* Create the .got section. */
1204 elf64_alpha_create_got_section (bfd *abfd,
1205 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1209 if ((s = bfd_get_section_by_name (abfd, ".got")))
1211 /* Check for a non-linker created .got? */
1212 if (alpha_elf_tdata (abfd)->got == NULL)
1213 alpha_elf_tdata (abfd)->got = s;
1217 s = bfd_make_section_with_flags (abfd, ".got", (SEC_ALLOC | SEC_LOAD
1220 | SEC_LINKER_CREATED));
1222 || !bfd_set_section_alignment (abfd, s, 3))
1225 alpha_elf_tdata (abfd)->got = s;
1230 /* Create all the dynamic sections. */
1233 elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
1236 struct elf_link_hash_entry *h;
1237 struct bfd_link_hash_entry *bh;
1239 /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
1241 s = bfd_make_section_with_flags (abfd, ".plt",
1242 (SEC_ALLOC | SEC_LOAD | SEC_CODE
1245 | SEC_LINKER_CREATED
1246 | (elf64_alpha_use_secureplt
1247 ? SEC_READONLY : 0)));
1248 if (s == NULL || ! bfd_set_section_alignment (abfd, s, 4))
1251 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
1254 if (! (_bfd_generic_link_add_one_symbol
1255 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
1256 (bfd_vma) 0, (const char *) NULL, FALSE,
1257 get_elf_backend_data (abfd)->collect, &bh)))
1259 h = (struct elf_link_hash_entry *) bh;
1261 h->type = STT_OBJECT;
1263 if (info->shared && ! bfd_elf_link_record_dynamic_symbol (info, h))
1266 s = bfd_make_section_with_flags (abfd, ".rela.plt",
1267 (SEC_ALLOC | SEC_LOAD
1270 | SEC_LINKER_CREATED
1272 if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3))
1275 if (elf64_alpha_use_secureplt)
1277 s = bfd_make_section_with_flags (abfd, ".got.plt",
1278 SEC_ALLOC | SEC_LINKER_CREATED);
1279 if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3))
1283 /* We may or may not have created a .got section for this object, but
1284 we definitely havn't done the rest of the work. */
1286 if (!elf64_alpha_create_got_section (abfd, info))
1289 s = bfd_make_section_with_flags (abfd, ".rela.got",
1290 (SEC_ALLOC | SEC_LOAD
1293 | SEC_LINKER_CREATED
1296 || !bfd_set_section_alignment (abfd, s, 3))
1299 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
1300 dynobj's .got section. We don't do this in the linker script
1301 because we don't want to define the symbol if we are not creating
1302 a global offset table. */
1304 if (!(_bfd_generic_link_add_one_symbol
1305 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL,
1306 alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL,
1307 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
1309 h = (struct elf_link_hash_entry *) bh;
1311 h->type = STT_OBJECT;
1314 && ! bfd_elf_link_record_dynamic_symbol (info, h))
1317 elf_hash_table (info)->hgot = h;
1322 /* Read ECOFF debugging information from a .mdebug section into a
1323 ecoff_debug_info structure. */
1326 elf64_alpha_read_ecoff_info (bfd *abfd, asection *section,
1327 struct ecoff_debug_info *debug)
1330 const struct ecoff_debug_swap *swap;
1331 char *ext_hdr = NULL;
1333 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1334 memset (debug, 0, sizeof (*debug));
1336 ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
1337 if (ext_hdr == NULL && swap->external_hdr_size != 0)
1340 if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
1341 swap->external_hdr_size))
1344 symhdr = &debug->symbolic_header;
1345 (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
1347 /* The symbolic header contains absolute file offsets and sizes to
1349 #define READ(ptr, offset, count, size, type) \
1350 if (symhdr->count == 0) \
1351 debug->ptr = NULL; \
1354 bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
1355 debug->ptr = (type) bfd_malloc (amt); \
1356 if (debug->ptr == NULL) \
1357 goto error_return; \
1358 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
1359 || bfd_bread (debug->ptr, amt, abfd) != amt) \
1360 goto error_return; \
1363 READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
1364 READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
1365 READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
1366 READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
1367 READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
1368 READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
1370 READ (ss, cbSsOffset, issMax, sizeof (char), char *);
1371 READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
1372 READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
1373 READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
1374 READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
1382 if (ext_hdr != NULL)
1384 if (debug->line != NULL)
1386 if (debug->external_dnr != NULL)
1387 free (debug->external_dnr);
1388 if (debug->external_pdr != NULL)
1389 free (debug->external_pdr);
1390 if (debug->external_sym != NULL)
1391 free (debug->external_sym);
1392 if (debug->external_opt != NULL)
1393 free (debug->external_opt);
1394 if (debug->external_aux != NULL)
1395 free (debug->external_aux);
1396 if (debug->ss != NULL)
1398 if (debug->ssext != NULL)
1399 free (debug->ssext);
1400 if (debug->external_fdr != NULL)
1401 free (debug->external_fdr);
1402 if (debug->external_rfd != NULL)
1403 free (debug->external_rfd);
1404 if (debug->external_ext != NULL)
1405 free (debug->external_ext);
1409 /* Alpha ELF local labels start with '$'. */
1412 elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
1414 return name[0] == '$';
1417 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
1418 routine in order to handle the ECOFF debugging information. We
1419 still call this mips_elf_find_line because of the slot
1420 find_line_info in elf_obj_tdata is declared that way. */
1422 struct mips_elf_find_line
1424 struct ecoff_debug_info d;
1425 struct ecoff_find_line i;
1429 elf64_alpha_find_nearest_line (bfd *abfd, asection *section, asymbol **symbols,
1430 bfd_vma offset, const char **filename_ptr,
1431 const char **functionname_ptr,
1432 unsigned int *line_ptr)
1436 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
1437 filename_ptr, functionname_ptr,
1439 &elf_tdata (abfd)->dwarf2_find_line_info))
1442 msec = bfd_get_section_by_name (abfd, ".mdebug");
1446 struct mips_elf_find_line *fi;
1447 const struct ecoff_debug_swap * const swap =
1448 get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1450 /* If we are called during a link, alpha_elf_final_link may have
1451 cleared the SEC_HAS_CONTENTS field. We force it back on here
1452 if appropriate (which it normally will be). */
1453 origflags = msec->flags;
1454 if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
1455 msec->flags |= SEC_HAS_CONTENTS;
1457 fi = elf_tdata (abfd)->find_line_info;
1460 bfd_size_type external_fdr_size;
1463 struct fdr *fdr_ptr;
1464 bfd_size_type amt = sizeof (struct mips_elf_find_line);
1466 fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
1469 msec->flags = origflags;
1473 if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
1475 msec->flags = origflags;
1479 /* Swap in the FDR information. */
1480 amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
1481 fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
1482 if (fi->d.fdr == NULL)
1484 msec->flags = origflags;
1487 external_fdr_size = swap->external_fdr_size;
1488 fdr_ptr = fi->d.fdr;
1489 fraw_src = (char *) fi->d.external_fdr;
1490 fraw_end = (fraw_src
1491 + fi->d.symbolic_header.ifdMax * external_fdr_size);
1492 for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
1493 (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
1495 elf_tdata (abfd)->find_line_info = fi;
1497 /* Note that we don't bother to ever free this information.
1498 find_nearest_line is either called all the time, as in
1499 objdump -l, so the information should be saved, or it is
1500 rarely called, as in ld error messages, so the memory
1501 wasted is unimportant. Still, it would probably be a
1502 good idea for free_cached_info to throw it away. */
1505 if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
1506 &fi->i, filename_ptr, functionname_ptr,
1509 msec->flags = origflags;
1513 msec->flags = origflags;
1516 /* Fall back on the generic ELF find_nearest_line routine. */
1518 return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
1519 filename_ptr, functionname_ptr,
1523 /* Structure used to pass information to alpha_elf_output_extsym. */
1528 struct bfd_link_info *info;
1529 struct ecoff_debug_info *debug;
1530 const struct ecoff_debug_swap *swap;
1535 elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, PTR data)
1537 struct extsym_info *einfo = (struct extsym_info *) data;
1539 asection *sec, *output_section;
1541 if (h->root.root.type == bfd_link_hash_warning)
1542 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
1544 if (h->root.indx == -2)
1546 else if ((h->root.def_dynamic
1547 || h->root.ref_dynamic
1548 || h->root.root.type == bfd_link_hash_new)
1549 && !h->root.def_regular
1550 && !h->root.ref_regular)
1552 else if (einfo->info->strip == strip_all
1553 || (einfo->info->strip == strip_some
1554 && bfd_hash_lookup (einfo->info->keep_hash,
1555 h->root.root.root.string,
1556 FALSE, FALSE) == NULL))
1564 if (h->esym.ifd == -2)
1567 h->esym.cobol_main = 0;
1568 h->esym.weakext = 0;
1569 h->esym.reserved = 0;
1570 h->esym.ifd = ifdNil;
1571 h->esym.asym.value = 0;
1572 h->esym.asym.st = stGlobal;
1574 if (h->root.root.type != bfd_link_hash_defined
1575 && h->root.root.type != bfd_link_hash_defweak)
1576 h->esym.asym.sc = scAbs;
1581 sec = h->root.root.u.def.section;
1582 output_section = sec->output_section;
1584 /* When making a shared library and symbol h is the one from
1585 the another shared library, OUTPUT_SECTION may be null. */
1586 if (output_section == NULL)
1587 h->esym.asym.sc = scUndefined;
1590 name = bfd_section_name (output_section->owner, output_section);
1592 if (strcmp (name, ".text") == 0)
1593 h->esym.asym.sc = scText;
1594 else if (strcmp (name, ".data") == 0)
1595 h->esym.asym.sc = scData;
1596 else if (strcmp (name, ".sdata") == 0)
1597 h->esym.asym.sc = scSData;
1598 else if (strcmp (name, ".rodata") == 0
1599 || strcmp (name, ".rdata") == 0)
1600 h->esym.asym.sc = scRData;
1601 else if (strcmp (name, ".bss") == 0)
1602 h->esym.asym.sc = scBss;
1603 else if (strcmp (name, ".sbss") == 0)
1604 h->esym.asym.sc = scSBss;
1605 else if (strcmp (name, ".init") == 0)
1606 h->esym.asym.sc = scInit;
1607 else if (strcmp (name, ".fini") == 0)
1608 h->esym.asym.sc = scFini;
1610 h->esym.asym.sc = scAbs;
1614 h->esym.asym.reserved = 0;
1615 h->esym.asym.index = indexNil;
1618 if (h->root.root.type == bfd_link_hash_common)
1619 h->esym.asym.value = h->root.root.u.c.size;
1620 else if (h->root.root.type == bfd_link_hash_defined
1621 || h->root.root.type == bfd_link_hash_defweak)
1623 if (h->esym.asym.sc == scCommon)
1624 h->esym.asym.sc = scBss;
1625 else if (h->esym.asym.sc == scSCommon)
1626 h->esym.asym.sc = scSBss;
1628 sec = h->root.root.u.def.section;
1629 output_section = sec->output_section;
1630 if (output_section != NULL)
1631 h->esym.asym.value = (h->root.root.u.def.value
1632 + sec->output_offset
1633 + output_section->vma);
1635 h->esym.asym.value = 0;
1638 if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
1639 h->root.root.root.string,
1642 einfo->failed = TRUE;
1649 /* Search for and possibly create a got entry. */
1651 static struct alpha_elf_got_entry *
1652 get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h,
1653 unsigned long r_type, unsigned long r_symndx,
1656 struct alpha_elf_got_entry *gotent;
1657 struct alpha_elf_got_entry **slot;
1660 slot = &h->got_entries;
1663 /* This is a local .got entry -- record for merge. */
1665 struct alpha_elf_got_entry **local_got_entries;
1667 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
1668 if (!local_got_entries)
1671 Elf_Internal_Shdr *symtab_hdr;
1673 symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
1674 size = symtab_hdr->sh_info;
1675 size *= sizeof (struct alpha_elf_got_entry *);
1678 = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
1679 if (!local_got_entries)
1682 alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
1685 slot = &local_got_entries[r_symndx];
1688 for (gotent = *slot; gotent ; gotent = gotent->next)
1689 if (gotent->gotobj == abfd
1690 && gotent->reloc_type == r_type
1691 && gotent->addend == r_addend)
1699 amt = sizeof (struct alpha_elf_got_entry);
1700 gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
1704 gotent->gotobj = abfd;
1705 gotent->addend = r_addend;
1706 gotent->got_offset = -1;
1707 gotent->plt_offset = -1;
1708 gotent->use_count = 1;
1709 gotent->reloc_type = r_type;
1710 gotent->reloc_done = 0;
1711 gotent->reloc_xlated = 0;
1713 gotent->next = *slot;
1716 entry_size = alpha_got_entry_size (r_type);
1717 alpha_elf_tdata (abfd)->total_got_size += entry_size;
1719 alpha_elf_tdata(abfd)->local_got_size += entry_size;
1722 gotent->use_count += 1;
1728 elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah)
1730 return ((ah->root.type == STT_FUNC
1731 || ah->root.root.type == bfd_link_hash_undefweak
1732 || ah->root.root.type == bfd_link_hash_undefined)
1733 && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0
1734 && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0);
1737 /* Handle dynamic relocations when doing an Alpha ELF link. */
1740 elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info,
1741 asection *sec, const Elf_Internal_Rela *relocs)
1745 const char *rel_sec_name;
1746 Elf_Internal_Shdr *symtab_hdr;
1747 struct alpha_elf_link_hash_entry **sym_hashes;
1748 const Elf_Internal_Rela *rel, *relend;
1749 bfd_boolean got_created;
1752 if (info->relocatable)
1755 /* Don't do anything special with non-loaded, non-alloced sections.
1756 In particular, any relocs in such sections should not affect GOT
1757 and PLT reference counting (ie. we don't allow them to create GOT
1758 or PLT entries), there's no possibility or desire to optimize TLS
1759 relocs, and there's not much point in propagating relocs to shared
1760 libs that the dynamic linker won't relocate. */
1761 if ((sec->flags & SEC_ALLOC) == 0)
1764 dynobj = elf_hash_table(info)->dynobj;
1766 elf_hash_table(info)->dynobj = dynobj = abfd;
1769 rel_sec_name = NULL;
1770 symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
1771 sym_hashes = alpha_elf_sym_hashes(abfd);
1772 got_created = FALSE;
1774 relend = relocs + sec->reloc_count;
1775 for (rel = relocs; rel < relend; ++rel)
1783 unsigned long r_symndx, r_type;
1784 struct alpha_elf_link_hash_entry *h;
1785 unsigned int gotent_flags;
1786 bfd_boolean maybe_dynamic;
1790 r_symndx = ELF64_R_SYM (rel->r_info);
1791 if (r_symndx < symtab_hdr->sh_info)
1795 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1797 while (h->root.root.type == bfd_link_hash_indirect
1798 || h->root.root.type == bfd_link_hash_warning)
1799 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
1801 h->root.ref_regular = 1;
1804 /* We can only get preliminary data on whether a symbol is
1805 locally or externally defined, as not all of the input files
1806 have yet been processed. Do something with what we know, as
1807 this may help reduce memory usage and processing time later. */
1808 maybe_dynamic = FALSE;
1809 if (h && ((info->shared
1811 || info->unresolved_syms_in_shared_libs == RM_IGNORE))
1812 || !h->root.def_regular
1813 || h->root.root.type == bfd_link_hash_defweak))
1814 maybe_dynamic = TRUE;
1818 r_type = ELF64_R_TYPE (rel->r_info);
1819 addend = rel->r_addend;
1823 case R_ALPHA_LITERAL:
1824 need = NEED_GOT | NEED_GOT_ENTRY;
1826 /* Remember how this literal is used from its LITUSEs.
1827 This will be important when it comes to decide if we can
1828 create a .plt entry for a function symbol. */
1829 while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
1830 if (rel->r_addend >= 1 && rel->r_addend <= 6)
1831 gotent_flags |= 1 << rel->r_addend;
1834 /* No LITUSEs -- presumably the address is used somehow. */
1835 if (gotent_flags == 0)
1836 gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
1839 case R_ALPHA_GPDISP:
1840 case R_ALPHA_GPREL16:
1841 case R_ALPHA_GPREL32:
1842 case R_ALPHA_GPRELHIGH:
1843 case R_ALPHA_GPRELLOW:
1848 case R_ALPHA_REFLONG:
1849 case R_ALPHA_REFQUAD:
1850 if (info->shared || maybe_dynamic)
1854 case R_ALPHA_TLSLDM:
1855 /* The symbol for a TLSLDM reloc is ignored. Collapse the
1856 reloc to the 0 symbol so that they all match. */
1859 maybe_dynamic = FALSE;
1863 case R_ALPHA_GOTDTPREL:
1864 need = NEED_GOT | NEED_GOT_ENTRY;
1867 case R_ALPHA_GOTTPREL:
1868 need = NEED_GOT | NEED_GOT_ENTRY;
1869 gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
1871 info->flags |= DF_STATIC_TLS;
1874 case R_ALPHA_TPREL64:
1875 if (info->shared || maybe_dynamic)
1878 info->flags |= DF_STATIC_TLS;
1882 if (need & NEED_GOT)
1886 if (!elf64_alpha_create_got_section (abfd, info))
1889 /* Make sure the object's gotobj is set to itself so
1890 that we default to every object with its own .got.
1891 We'll merge .gots later once we've collected each
1893 alpha_elf_tdata(abfd)->gotobj = abfd;
1899 if (need & NEED_GOT_ENTRY)
1901 struct alpha_elf_got_entry *gotent;
1903 gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
1909 gotent->flags |= gotent_flags;
1912 gotent_flags |= h->flags;
1913 h->flags = gotent_flags;
1915 /* Make a guess as to whether a .plt entry is needed. */
1916 /* ??? It appears that we won't make it into
1917 adjust_dynamic_symbol for symbols that remain
1918 totally undefined. Copying this check here means
1919 we can create a plt entry for them too. */
1921 = (maybe_dynamic && elf64_alpha_want_plt (h));
1926 if (need & NEED_DYNREL)
1928 if (rel_sec_name == NULL)
1930 rel_sec_name = (bfd_elf_string_from_elf_section
1931 (abfd, elf_elfheader(abfd)->e_shstrndx,
1932 elf_section_data(sec)->rel_hdr.sh_name));
1933 if (rel_sec_name == NULL)
1936 BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0
1937 && strcmp (bfd_get_section_name (abfd, sec),
1938 rel_sec_name+5) == 0);
1941 /* We need to create the section here now whether we eventually
1942 use it or not so that it gets mapped to an output section by
1943 the linker. If not used, we'll kill it in
1944 size_dynamic_sections. */
1947 sreloc = bfd_get_section_by_name (dynobj, rel_sec_name);
1952 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
1953 | SEC_LINKER_CREATED | SEC_READONLY);
1954 if (sec->flags & SEC_ALLOC)
1955 flags |= SEC_ALLOC | SEC_LOAD;
1956 sreloc = bfd_make_section_with_flags (dynobj,
1960 || !bfd_set_section_alignment (dynobj, sreloc, 3))
1967 /* Since we havn't seen all of the input symbols yet, we
1968 don't know whether we'll actually need a dynamic relocation
1969 entry for this reloc. So make a record of it. Once we
1970 find out if this thing needs dynamic relocation we'll
1971 expand the relocation sections by the appropriate amount. */
1973 struct alpha_elf_reloc_entry *rent;
1975 for (rent = h->reloc_entries; rent; rent = rent->next)
1976 if (rent->rtype == r_type && rent->srel == sreloc)
1981 amt = sizeof (struct alpha_elf_reloc_entry);
1982 rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
1986 rent->srel = sreloc;
1987 rent->rtype = r_type;
1989 rent->reltext = (sec->flags & SEC_READONLY) != 0;
1991 rent->next = h->reloc_entries;
1992 h->reloc_entries = rent;
1997 else if (info->shared)
1999 /* If this is a shared library, and the section is to be
2000 loaded into memory, we need a RELATIVE reloc. */
2001 sreloc->size += sizeof (Elf64_External_Rela);
2002 if (sec->flags & SEC_READONLY)
2003 info->flags |= DF_TEXTREL;
2011 /* Adjust a symbol defined by a dynamic object and referenced by a
2012 regular object. The current definition is in some section of the
2013 dynamic object, but we're not including those sections. We have to
2014 change the definition to something the rest of the link can
2018 elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info,
2019 struct elf_link_hash_entry *h)
2023 struct alpha_elf_link_hash_entry *ah;
2025 dynobj = elf_hash_table(info)->dynobj;
2026 ah = (struct alpha_elf_link_hash_entry *)h;
2028 /* Now that we've seen all of the input symbols, finalize our decision
2029 about whether this symbol should get a .plt entry. Irritatingly, it
2030 is common for folk to leave undefined symbols in shared libraries,
2031 and they still expect lazy binding; accept undefined symbols in lieu
2033 if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah))
2035 h->needs_plt = TRUE;
2037 s = bfd_get_section_by_name(dynobj, ".plt");
2038 if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
2041 /* We need one plt entry per got subsection. Delay allocation of
2042 the actual plt entries until size_plt_section, called from
2043 size_dynamic_sections or during relaxation. */
2048 h->needs_plt = FALSE;
2050 /* If this is a weak symbol, and there is a real definition, the
2051 processor independent code will have arranged for us to see the
2052 real definition first, and we can just use the same value. */
2053 if (h->u.weakdef != NULL)
2055 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2056 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2057 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2058 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2062 /* This is a reference to a symbol defined by a dynamic object which
2063 is not a function. The Alpha, since it uses .got entries for all
2064 symbols even in regular objects, does not need the hackery of a
2065 .dynbss section and COPY dynamic relocations. */
2070 /* Symbol versioning can create new symbols, and make our old symbols
2071 indirect to the new ones. Consolidate the got and reloc information
2072 in these situations. */
2075 elf64_alpha_merge_ind_symbols (struct alpha_elf_link_hash_entry *hi,
2076 PTR dummy ATTRIBUTE_UNUSED)
2078 struct alpha_elf_link_hash_entry *hs;
2080 if (hi->root.root.type != bfd_link_hash_indirect)
2084 hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link;
2085 } while (hs->root.root.type == bfd_link_hash_indirect);
2087 /* Merge the flags. Whee. */
2089 hs->flags |= hi->flags;
2091 /* Merge the .got entries. Cannibalize the old symbol's list in
2092 doing so, since we don't need it anymore. */
2094 if (hs->got_entries == NULL)
2095 hs->got_entries = hi->got_entries;
2098 struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
2100 gsh = hs->got_entries;
2101 for (gi = hi->got_entries; gi ; gi = gin)
2104 for (gs = gsh; gs ; gs = gs->next)
2105 if (gi->gotobj == gs->gotobj
2106 && gi->reloc_type == gs->reloc_type
2107 && gi->addend == gs->addend)
2109 gi->use_count += gs->use_count;
2112 gi->next = hs->got_entries;
2113 hs->got_entries = gi;
2117 hi->got_entries = NULL;
2119 /* And similar for the reloc entries. */
2121 if (hs->reloc_entries == NULL)
2122 hs->reloc_entries = hi->reloc_entries;
2125 struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
2127 rsh = hs->reloc_entries;
2128 for (ri = hi->reloc_entries; ri ; ri = rin)
2131 for (rs = rsh; rs ; rs = rs->next)
2132 if (ri->rtype == rs->rtype && ri->srel == rs->srel)
2134 rs->count += ri->count;
2137 ri->next = hs->reloc_entries;
2138 hs->reloc_entries = ri;
2142 hi->reloc_entries = NULL;
2147 /* Is it possible to merge two object file's .got tables? */
2150 elf64_alpha_can_merge_gots (bfd *a, bfd *b)
2152 int total = alpha_elf_tdata (a)->total_got_size;
2155 /* Trivial quick fallout test. */
2156 if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
2159 /* By their nature, local .got entries cannot be merged. */
2160 if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
2163 /* Failing the common trivial comparison, we must effectively
2164 perform the merge. Not actually performing the merge means that
2165 we don't have to store undo information in case we fail. */
2166 for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
2168 struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
2169 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
2172 n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
2173 for (i = 0; i < n; ++i)
2175 struct alpha_elf_got_entry *ae, *be;
2176 struct alpha_elf_link_hash_entry *h;
2179 while (h->root.root.type == bfd_link_hash_indirect
2180 || h->root.root.type == bfd_link_hash_warning)
2181 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2183 for (be = h->got_entries; be ; be = be->next)
2185 if (be->use_count == 0)
2187 if (be->gotobj != b)
2190 for (ae = h->got_entries; ae ; ae = ae->next)
2192 && ae->reloc_type == be->reloc_type
2193 && ae->addend == be->addend)
2196 total += alpha_got_entry_size (be->reloc_type);
2197 if (total > MAX_GOT_SIZE)
2207 /* Actually merge two .got tables. */
2210 elf64_alpha_merge_gots (bfd *a, bfd *b)
2212 int total = alpha_elf_tdata (a)->total_got_size;
2215 /* Remember local expansion. */
2217 int e = alpha_elf_tdata (b)->local_got_size;
2219 alpha_elf_tdata (a)->local_got_size += e;
2222 for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
2224 struct alpha_elf_got_entry **local_got_entries;
2225 struct alpha_elf_link_hash_entry **hashes;
2226 Elf_Internal_Shdr *symtab_hdr;
2229 /* Let the local .got entries know they are part of a new subsegment. */
2230 local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
2231 if (local_got_entries)
2233 n = elf_tdata (bsub)->symtab_hdr.sh_info;
2234 for (i = 0; i < n; ++i)
2236 struct alpha_elf_got_entry *ent;
2237 for (ent = local_got_entries[i]; ent; ent = ent->next)
2242 /* Merge the global .got entries. */
2243 hashes = alpha_elf_sym_hashes (bsub);
2244 symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
2246 n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
2247 for (i = 0; i < n; ++i)
2249 struct alpha_elf_got_entry *ae, *be, **pbe, **start;
2250 struct alpha_elf_link_hash_entry *h;
2253 while (h->root.root.type == bfd_link_hash_indirect
2254 || h->root.root.type == bfd_link_hash_warning)
2255 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2257 pbe = start = &h->got_entries;
2258 while ((be = *pbe) != NULL)
2260 if (be->use_count == 0)
2263 memset (be, 0xa5, sizeof (*be));
2266 if (be->gotobj != b)
2269 for (ae = *start; ae ; ae = ae->next)
2271 && ae->reloc_type == be->reloc_type
2272 && ae->addend == be->addend)
2274 ae->flags |= be->flags;
2275 ae->use_count += be->use_count;
2277 memset (be, 0xa5, sizeof (*be));
2281 total += alpha_got_entry_size (be->reloc_type);
2289 alpha_elf_tdata (bsub)->gotobj = a;
2291 alpha_elf_tdata (a)->total_got_size = total;
2293 /* Merge the two in_got chains. */
2298 while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
2301 alpha_elf_tdata (bsub)->in_got_link_next = b;
2305 /* Calculate the offsets for the got entries. */
2308 elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h,
2309 PTR arg ATTRIBUTE_UNUSED)
2311 struct alpha_elf_got_entry *gotent;
2313 if (h->root.root.type == bfd_link_hash_warning)
2314 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
2316 for (gotent = h->got_entries; gotent; gotent = gotent->next)
2317 if (gotent->use_count > 0)
2319 struct alpha_elf_obj_tdata *td;
2320 bfd_size_type *plge;
2322 td = alpha_elf_tdata (gotent->gotobj);
2323 plge = &td->got->size;
2324 gotent->got_offset = *plge;
2325 *plge += alpha_got_entry_size (gotent->reloc_type);
2332 elf64_alpha_calc_got_offsets (struct bfd_link_info *info)
2334 bfd *i, *got_list = alpha_elf_hash_table(info)->got_list;
2336 /* First, zero out the .got sizes, as we may be recalculating the
2337 .got after optimizing it. */
2338 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
2339 alpha_elf_tdata(i)->got->size = 0;
2341 /* Next, fill in the offsets for all the global entries. */
2342 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
2343 elf64_alpha_calc_got_offsets_for_symbol,
2346 /* Finally, fill in the offsets for the local entries. */
2347 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
2349 bfd_size_type got_offset = alpha_elf_tdata(i)->got->size;
2352 for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
2354 struct alpha_elf_got_entry **local_got_entries, *gotent;
2357 local_got_entries = alpha_elf_tdata(j)->local_got_entries;
2358 if (!local_got_entries)
2361 for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
2362 for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
2363 if (gotent->use_count > 0)
2365 gotent->got_offset = got_offset;
2366 got_offset += alpha_got_entry_size (gotent->reloc_type);
2370 alpha_elf_tdata(i)->got->size = got_offset;
2374 /* Constructs the gots. */
2377 elf64_alpha_size_got_sections (struct bfd_link_info *info)
2379 bfd *i, *got_list, *cur_got_obj = NULL;
2380 int something_changed = 0;
2382 got_list = alpha_elf_hash_table (info)->got_list;
2384 /* On the first time through, pretend we have an existing got list
2385 consisting of all of the input files. */
2386 if (got_list == NULL)
2388 for (i = info->input_bfds; i ; i = i->link_next)
2390 bfd *this_got = alpha_elf_tdata (i)->gotobj;
2391 if (this_got == NULL)
2394 /* We are assuming no merging has yet occurred. */
2395 BFD_ASSERT (this_got == i);
2397 if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
2399 /* Yikes! A single object file has too many entries. */
2400 (*_bfd_error_handler)
2401 (_("%B: .got subsegment exceeds 64K (size %d)"),
2402 i, alpha_elf_tdata (this_got)->total_got_size);
2406 if (got_list == NULL)
2407 got_list = this_got;
2409 alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
2410 cur_got_obj = this_got;
2413 /* Strange degenerate case of no got references. */
2414 if (got_list == NULL)
2417 alpha_elf_hash_table (info)->got_list = got_list;
2419 /* Force got offsets to be recalculated. */
2420 something_changed = 1;
2423 cur_got_obj = got_list;
2424 i = alpha_elf_tdata(cur_got_obj)->got_link_next;
2427 if (elf64_alpha_can_merge_gots (cur_got_obj, i))
2429 elf64_alpha_merge_gots (cur_got_obj, i);
2431 alpha_elf_tdata(i)->got->size = 0;
2432 i = alpha_elf_tdata(i)->got_link_next;
2433 alpha_elf_tdata(cur_got_obj)->got_link_next = i;
2435 something_changed = 1;
2440 i = alpha_elf_tdata(i)->got_link_next;
2444 /* Once the gots have been merged, fill in the got offsets for
2445 everything therein. */
2446 if (1 || something_changed)
2447 elf64_alpha_calc_got_offsets (info);
2453 elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, PTR data)
2455 asection *splt = (asection *) data;
2456 struct alpha_elf_got_entry *gotent;
2457 bfd_boolean saw_one = FALSE;
2459 /* If we didn't need an entry before, we still don't. */
2460 if (!h->root.needs_plt)
2463 /* For each LITERAL got entry still in use, allocate a plt entry. */
2464 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
2465 if (gotent->reloc_type == R_ALPHA_LITERAL
2466 && gotent->use_count > 0)
2468 if (splt->size == 0)
2469 splt->size = PLT_HEADER_SIZE;
2470 gotent->plt_offset = splt->size;
2471 splt->size += PLT_ENTRY_SIZE;
2475 /* If there weren't any, there's no longer a need for the PLT entry. */
2477 h->root.needs_plt = FALSE;
2482 /* Called from relax_section to rebuild the PLT in light of
2483 potential changes in the function's status. */
2486 elf64_alpha_size_plt_section (struct bfd_link_info *info)
2488 asection *splt, *spltrel, *sgotplt;
2489 unsigned long entries;
2492 dynobj = elf_hash_table(info)->dynobj;
2493 splt = bfd_get_section_by_name (dynobj, ".plt");
2499 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
2500 elf64_alpha_size_plt_section_1, splt);
2502 /* Every plt entry requires a JMP_SLOT relocation. */
2503 spltrel = bfd_get_section_by_name (dynobj, ".rela.plt");
2506 if (elf64_alpha_use_secureplt)
2507 entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE;
2509 entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE;
2513 spltrel->size = entries * sizeof (Elf64_External_Rela);
2515 /* When using the secureplt, we need two words somewhere in the data
2516 segment for the dynamic linker to tell us where to go. This is the
2517 entire contents of the .got.plt section. */
2518 if (elf64_alpha_use_secureplt)
2520 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2521 sgotplt->size = entries ? 16 : 0;
2528 elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2529 struct bfd_link_info *info)
2533 if (info->relocatable)
2536 /* First, take care of the indirect symbols created by versioning. */
2537 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
2538 elf64_alpha_merge_ind_symbols,
2541 if (!elf64_alpha_size_got_sections (info))
2544 /* Allocate space for all of the .got subsections. */
2545 i = alpha_elf_hash_table (info)->got_list;
2546 for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
2548 asection *s = alpha_elf_tdata(i)->got;
2551 s->contents = (bfd_byte *) bfd_zalloc (i, s->size);
2552 if (s->contents == NULL)
2560 /* The number of dynamic relocations required by a static relocation. */
2563 alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared)
2567 /* May appear in GOT entries. */
2569 return (dynamic ? 2 : shared ? 1 : 0);
2570 case R_ALPHA_TLSLDM:
2572 case R_ALPHA_LITERAL:
2573 case R_ALPHA_GOTTPREL:
2574 return dynamic || shared;
2575 case R_ALPHA_GOTDTPREL:
2578 /* May appear in data sections. */
2579 case R_ALPHA_REFLONG:
2580 case R_ALPHA_REFQUAD:
2581 case R_ALPHA_TPREL64:
2582 return dynamic || shared;
2584 /* Everything else is illegal. We'll issue an error during
2585 relocate_section. */
2591 /* Work out the sizes of the dynamic relocation entries. */
2594 elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h,
2595 struct bfd_link_info *info)
2597 bfd_boolean dynamic;
2598 struct alpha_elf_reloc_entry *relent;
2599 unsigned long entries;
2601 if (h->root.root.type == bfd_link_hash_warning)
2602 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
2604 /* If the symbol was defined as a common symbol in a regular object
2605 file, and there was no definition in any dynamic object, then the
2606 linker will have allocated space for the symbol in a common
2607 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
2608 set. This is done for dynamic symbols in
2609 elf_adjust_dynamic_symbol but this is not done for non-dynamic
2610 symbols, somehow. */
2611 if (!h->root.def_regular
2612 && h->root.ref_regular
2613 && !h->root.def_dynamic
2614 && (h->root.root.type == bfd_link_hash_defined
2615 || h->root.root.type == bfd_link_hash_defweak)
2616 && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
2617 h->root.def_regular = 1;
2619 /* If the symbol is dynamic, we'll need all the relocations in their
2620 natural form. If this is a shared object, and it has been forced
2621 local, we'll need the same number of RELATIVE relocations. */
2622 dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
2624 /* If the symbol is a hidden undefined weak, then we never have any
2625 relocations. Avoid the loop which may want to add RELATIVE relocs
2626 based on info->shared. */
2627 if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
2630 for (relent = h->reloc_entries; relent; relent = relent->next)
2632 entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
2636 relent->srel->size +=
2637 entries * sizeof (Elf64_External_Rela) * relent->count;
2638 if (relent->reltext)
2639 info->flags |= DT_TEXTREL;
2646 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
2650 elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h,
2651 struct bfd_link_info *info)
2653 bfd_boolean dynamic;
2654 struct alpha_elf_got_entry *gotent;
2655 unsigned long entries;
2657 if (h->root.root.type == bfd_link_hash_warning)
2658 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
2660 /* If we're using a plt for this symbol, then all of its relocations
2661 for its got entries go into .rela.plt. */
2662 if (h->root.needs_plt)
2665 /* If the symbol is dynamic, we'll need all the relocations in their
2666 natural form. If this is a shared object, and it has been forced
2667 local, we'll need the same number of RELATIVE relocations. */
2668 dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
2670 /* If the symbol is a hidden undefined weak, then we never have any
2671 relocations. Avoid the loop which may want to add RELATIVE relocs
2672 based on info->shared. */
2673 if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
2677 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
2678 if (gotent->use_count > 0)
2679 entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type,
2680 dynamic, info->shared);
2684 bfd *dynobj = elf_hash_table(info)->dynobj;
2685 asection *srel = bfd_get_section_by_name (dynobj, ".rela.got");
2686 BFD_ASSERT (srel != NULL);
2687 srel->size += sizeof (Elf64_External_Rela) * entries;
2693 /* Set the sizes of the dynamic relocation sections. */
2696 elf64_alpha_size_rela_got_section (struct bfd_link_info *info)
2698 unsigned long entries;
2702 /* Shared libraries often require RELATIVE relocs, and some relocs
2703 require attention for the main application as well. */
2706 for (i = alpha_elf_hash_table(info)->got_list;
2707 i ; i = alpha_elf_tdata(i)->got_link_next)
2711 for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
2713 struct alpha_elf_got_entry **local_got_entries, *gotent;
2716 local_got_entries = alpha_elf_tdata(j)->local_got_entries;
2717 if (!local_got_entries)
2720 for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
2721 for (gotent = local_got_entries[k];
2722 gotent ; gotent = gotent->next)
2723 if (gotent->use_count > 0)
2724 entries += (alpha_dynamic_entries_for_reloc
2725 (gotent->reloc_type, 0, info->shared));
2729 dynobj = elf_hash_table(info)->dynobj;
2730 srel = bfd_get_section_by_name (dynobj, ".rela.got");
2733 BFD_ASSERT (entries == 0);
2736 srel->size = sizeof (Elf64_External_Rela) * entries;
2738 /* Now do the non-local symbols. */
2739 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
2740 elf64_alpha_size_rela_got_1, info);
2745 /* Set the sizes of the dynamic sections. */
2748 elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2749 struct bfd_link_info *info)
2755 dynobj = elf_hash_table(info)->dynobj;
2756 BFD_ASSERT(dynobj != NULL);
2758 if (elf_hash_table (info)->dynamic_sections_created)
2760 /* Set the contents of the .interp section to the interpreter. */
2761 if (info->executable)
2763 s = bfd_get_section_by_name (dynobj, ".interp");
2764 BFD_ASSERT (s != NULL);
2765 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2766 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2769 /* Now that we've seen all of the input files, we can decide which
2770 symbols need dynamic relocation entries and which don't. We've
2771 collected information in check_relocs that we can now apply to
2772 size the dynamic relocation sections. */
2773 alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
2774 elf64_alpha_calc_dynrel_sizes, info);
2776 elf64_alpha_size_rela_got_section (info);
2777 elf64_alpha_size_plt_section (info);
2779 /* else we're not dynamic and by definition we don't need such things. */
2781 /* The check_relocs and adjust_dynamic_symbol entry points have
2782 determined the sizes of the various dynamic sections. Allocate
2785 for (s = dynobj->sections; s != NULL; s = s->next)
2790 if (!(s->flags & SEC_LINKER_CREATED))
2793 /* It's OK to base decisions on the section name, because none
2794 of the dynobj section names depend upon the input files. */
2795 name = bfd_get_section_name (dynobj, s);
2797 /* If we don't need this section, strip it from the output file.
2798 This is to handle .rela.bss and .rela.plt. We must create it
2799 in create_dynamic_sections, because it must be created before
2800 the linker maps input sections to output sections. The
2801 linker does that before adjust_dynamic_symbol is called, and
2802 it is that function which decides whether anything needs to
2803 go into these sections. */
2807 if (strncmp (name, ".rela", 5) == 0)
2809 strip = (s->size == 0);
2813 if (strcmp(name, ".rela.plt") == 0)
2816 /* We use the reloc_count field as a counter if we need
2817 to copy relocs into the output file. */
2821 else if (strcmp (name, ".plt") != 0)
2823 /* It's not one of our dynamic sections, so don't allocate space. */
2828 s->flags |= SEC_EXCLUDE;
2831 /* Allocate memory for the section contents. */
2832 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2833 if (s->contents == NULL && s->size != 0)
2838 if (elf_hash_table (info)->dynamic_sections_created)
2840 /* Add some entries to the .dynamic section. We fill in the
2841 values later, in elf64_alpha_finish_dynamic_sections, but we
2842 must add the entries now so that we get the correct size for
2843 the .dynamic section. The DT_DEBUG entry is filled in by the
2844 dynamic linker and used by the debugger. */
2845 #define add_dynamic_entry(TAG, VAL) \
2846 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2848 if (info->executable)
2850 if (!add_dynamic_entry (DT_DEBUG, 0))
2856 if (!add_dynamic_entry (DT_PLTGOT, 0)
2857 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2858 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2859 || !add_dynamic_entry (DT_JMPREL, 0))
2862 if (elf64_alpha_use_secureplt
2863 && !add_dynamic_entry (DT_ALPHA_PLTRO, 1))
2867 if (!add_dynamic_entry (DT_RELA, 0)
2868 || !add_dynamic_entry (DT_RELASZ, 0)
2869 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2872 if (info->flags & DF_TEXTREL)
2874 if (!add_dynamic_entry (DT_TEXTREL, 0))
2878 #undef add_dynamic_entry
2883 /* These functions do relaxation for Alpha ELF.
2885 Currently I'm only handling what I can do with existing compiler
2886 and assembler support, which means no instructions are removed,
2887 though some may be nopped. At this time GCC does not emit enough
2888 information to do all of the relaxing that is possible. It will
2889 take some not small amount of work for that to happen.
2891 There are a couple of interesting papers that I once read on this
2892 subject, that I cannot find references to at the moment, that
2893 related to Alpha in particular. They are by David Wall, then of
2896 struct alpha_relax_info
2901 Elf_Internal_Shdr *symtab_hdr;
2902 Elf_Internal_Rela *relocs, *relend;
2903 struct bfd_link_info *link_info;
2907 struct alpha_elf_link_hash_entry *h;
2908 struct alpha_elf_got_entry **first_gotent;
2909 struct alpha_elf_got_entry *gotent;
2910 bfd_boolean changed_contents;
2911 bfd_boolean changed_relocs;
2912 unsigned char other;
2915 static Elf_Internal_Rela *
2916 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel,
2917 Elf_Internal_Rela *relend,
2918 bfd_vma offset, int type)
2920 while (rel < relend)
2922 if (rel->r_offset == offset
2923 && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
2931 elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval,
2932 Elf_Internal_Rela *irel, unsigned long r_type)
2935 bfd_signed_vma disp;
2937 /* Get the instruction. */
2938 insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
2940 if (insn >> 26 != OP_LDQ)
2942 reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
2943 ((*_bfd_error_handler)
2944 ("%B: %A+0x%lx: warning: %s relocation against unexpected insn",
2945 info->abfd, info->sec,
2946 (unsigned long) irel->r_offset, howto->name));
2950 /* Can't relax dynamic symbols. */
2951 if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
2954 /* Can't use local-exec relocations in shared libraries. */
2955 if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared)
2958 if (r_type == R_ALPHA_LITERAL)
2960 /* Look for nice constant addresses. This includes the not-uncommon
2961 special case of 0 for undefweak symbols. */
2962 if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak)
2963 || (!info->link_info->shared
2964 && (symval >= (bfd_vma)-0x8000 || symval < 0x8000)))
2967 insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
2968 insn |= (symval & 0xffff);
2969 r_type = R_ALPHA_NONE;
2973 disp = symval - info->gp;
2974 insn = (OP_LDA << 26) | (insn & 0x03ff0000);
2975 r_type = R_ALPHA_GPREL16;
2980 bfd_vma dtp_base, tp_base;
2982 BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
2983 dtp_base = alpha_get_dtprel_base (info->link_info);
2984 tp_base = alpha_get_tprel_base (info->link_info);
2985 disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
2987 insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
2991 case R_ALPHA_GOTDTPREL:
2992 r_type = R_ALPHA_DTPREL16;
2994 case R_ALPHA_GOTTPREL:
2995 r_type = R_ALPHA_TPREL16;
3003 if (disp < -0x8000 || disp >= 0x8000)
3006 bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
3007 info->changed_contents = TRUE;
3009 /* Reduce the use count on this got entry by one, possibly
3011 if (--info->gotent->use_count == 0)
3013 int sz = alpha_got_entry_size (r_type);
3014 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
3016 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
3019 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3020 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
3021 info->changed_relocs = TRUE;
3023 /* ??? Search forward through this basic block looking for insns
3024 that use the target register. Stop after an insn modifying the
3025 register is seen, or after a branch or call.
3027 Any such memory load insn may be substituted by a load directly
3028 off the GP. This allows the memory load insn to be issued before
3029 the calculated GP register would otherwise be ready.
3031 Any such jsr insn can be replaced by a bsr if it is in range.
3033 This would mean that we'd have to _add_ relocations, the pain of
3034 which gives one pause. */
3040 elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval)
3042 /* If the function has the same gp, and we can identify that the
3043 function does not use its function pointer, we can eliminate the
3046 /* If the symbol is marked NOPV, we are being told the function never
3047 needs its procedure value. */
3048 if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
3051 /* If the symbol is marked STD_GP, we are being told the function does
3052 a normal ldgp in the first two words. */
3053 else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
3056 /* Otherwise, we may be able to identify a GP load in the first two
3057 words, which we can then skip. */
3060 Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
3063 /* Load the relocations from the section that the target symbol is in. */
3064 if (info->sec == info->tsec)
3066 tsec_relocs = info->relocs;
3067 tsec_relend = info->relend;
3072 tsec_relocs = (_bfd_elf_link_read_relocs
3073 (info->abfd, info->tsec, (PTR) NULL,
3074 (Elf_Internal_Rela *) NULL,
3075 info->link_info->keep_memory));
3076 if (tsec_relocs == NULL)
3078 tsec_relend = tsec_relocs + info->tsec->reloc_count;
3079 tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
3082 /* Recover the symbol's offset within the section. */
3083 ofs = (symval - info->tsec->output_section->vma
3084 - info->tsec->output_offset);
3086 /* Look for a GPDISP reloc. */
3087 gpdisp = (elf64_alpha_find_reloc_at_ofs
3088 (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
3090 if (!gpdisp || gpdisp->r_addend != 4)
3100 /* We've now determined that we can skip an initial gp load. Verify
3101 that the call and the target use the same gp. */
3102 if (info->link_info->hash->creator != info->tsec->owner->xvec
3103 || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
3110 elf64_alpha_relax_with_lituse (struct alpha_relax_info *info,
3111 bfd_vma symval, Elf_Internal_Rela *irel)
3113 Elf_Internal_Rela *urel, *irelend = info->relend;
3114 int flags, count, i;
3115 bfd_signed_vma disp;
3118 bfd_boolean lit_reused = FALSE;
3119 bfd_boolean all_optimized = TRUE;
3120 unsigned int lit_insn;
3122 lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
3123 if (lit_insn >> 26 != OP_LDQ)
3125 ((*_bfd_error_handler)
3126 ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn",
3127 info->abfd, info->sec,
3128 (unsigned long) irel->r_offset));
3132 /* Can't relax dynamic symbols. */
3133 if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
3136 /* Summarize how this particular LITERAL is used. */
3137 for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
3139 if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
3141 if (urel->r_addend <= 6)
3142 flags |= 1 << urel->r_addend;
3145 /* A little preparation for the loop... */
3146 disp = symval - info->gp;
3148 for (urel = irel+1, i = 0; i < count; ++i, ++urel)
3152 bfd_signed_vma xdisp;
3154 insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
3156 switch (urel->r_addend)
3158 case LITUSE_ALPHA_ADDR:
3160 /* This type is really just a placeholder to note that all
3161 uses cannot be optimized, but to still allow some. */
3162 all_optimized = FALSE;
3165 case LITUSE_ALPHA_BASE:
3166 /* We can always optimize 16-bit displacements. */
3168 /* Extract the displacement from the instruction, sign-extending
3169 it if necessary, then test whether it is within 16 or 32 bits
3170 displacement from GP. */
3171 insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000;
3173 xdisp = disp + insn_disp;
3174 fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
3175 fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
3176 && xdisp < 0x7fff8000);
3180 /* Take the op code and dest from this insn, take the base
3181 register from the literal insn. Leave the offset alone. */
3182 insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
3183 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
3185 urel->r_addend = irel->r_addend;
3186 info->changed_relocs = TRUE;
3188 bfd_put_32 (info->abfd, (bfd_vma) insn,
3189 info->contents + urel->r_offset);
3190 info->changed_contents = TRUE;
3193 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3194 else if (fits32 && !(flags & ~6))
3196 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3198 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
3200 lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
3201 bfd_put_32 (info->abfd, (bfd_vma) lit_insn,
3202 info->contents + irel->r_offset);
3204 info->changed_contents = TRUE;
3206 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
3208 urel->r_addend = irel->r_addend;
3209 info->changed_relocs = TRUE;
3212 all_optimized = FALSE;
3215 case LITUSE_ALPHA_BYTOFF:
3216 /* We can always optimize byte instructions. */
3218 /* FIXME: sanity check the insn for byte op. Check that the
3219 literal dest reg is indeed Rb in the byte insn. */
3221 insn &= ~ (unsigned) 0x001ff000;
3222 insn |= ((symval & 7) << 13) | 0x1000;
3224 urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3226 info->changed_relocs = TRUE;
3228 bfd_put_32 (info->abfd, (bfd_vma) insn,
3229 info->contents + urel->r_offset);
3230 info->changed_contents = TRUE;
3233 case LITUSE_ALPHA_JSR:
3234 case LITUSE_ALPHA_TLSGD:
3235 case LITUSE_ALPHA_TLSLDM:
3236 case LITUSE_ALPHA_JSRDIRECT:
3238 bfd_vma optdest, org;
3239 bfd_signed_vma odisp;
3241 /* For undefined weak symbols, we're mostly interested in getting
3242 rid of the got entry whenever possible, so optimize this to a
3243 use of the zero register. */
3244 if (info->h && info->h->root.root.type == bfd_link_hash_undefweak)
3247 bfd_put_32 (info->abfd, (bfd_vma) insn,
3248 info->contents + urel->r_offset);
3250 info->changed_contents = TRUE;
3254 /* If not zero, place to jump without needing pv. */
3255 optdest = elf64_alpha_relax_opt_call (info, symval);
3256 org = (info->sec->output_section->vma
3257 + info->sec->output_offset
3258 + urel->r_offset + 4);
3259 odisp = (optdest ? optdest : symval) - org;
3261 if (odisp >= -0x400000 && odisp < 0x400000)
3263 Elf_Internal_Rela *xrel;
3265 /* Preserve branch prediction call stack when possible. */
3266 if ((insn & INSN_JSR_MASK) == INSN_JSR)
3267 insn = (OP_BSR << 26) | (insn & 0x03e00000);
3269 insn = (OP_BR << 26) | (insn & 0x03e00000);
3271 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
3273 urel->r_addend = irel->r_addend;
3276 urel->r_addend += optdest - symval;
3278 all_optimized = FALSE;
3280 bfd_put_32 (info->abfd, (bfd_vma) insn,
3281 info->contents + urel->r_offset);
3283 /* Kill any HINT reloc that might exist for this insn. */
3284 xrel = (elf64_alpha_find_reloc_at_ofs
3285 (info->relocs, info->relend, urel->r_offset,
3288 xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3290 info->changed_contents = TRUE;
3291 info->changed_relocs = TRUE;
3294 all_optimized = FALSE;
3296 /* Even if the target is not in range for a direct branch,
3297 if we share a GP, we can eliminate the gp reload. */
3300 Elf_Internal_Rela *gpdisp
3301 = (elf64_alpha_find_reloc_at_ofs
3302 (info->relocs, irelend, urel->r_offset + 4,
3306 bfd_byte *p_ldah = info->contents + gpdisp->r_offset;
3307 bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
3308 unsigned int ldah = bfd_get_32 (info->abfd, p_ldah);
3309 unsigned int lda = bfd_get_32 (info->abfd, p_lda);
3311 /* Verify that the instruction is "ldah $29,0($26)".
3312 Consider a function that ends in a noreturn call,
3313 and that the next function begins with an ldgp,
3314 and that by accident there is no padding between.
3315 In that case the insn would use $27 as the base. */
3316 if (ldah == 0x27ba0000 && lda == 0x23bd0000)
3318 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah);
3319 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda);
3321 gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3322 info->changed_contents = TRUE;
3323 info->changed_relocs = TRUE;
3332 /* If all cases were optimized, we can reduce the use count on this
3333 got entry by one, possibly eliminating it. */
3336 if (--info->gotent->use_count == 0)
3338 int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
3339 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
3341 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
3344 /* If the literal instruction is no longer needed (it may have been
3345 reused. We can eliminate it. */
3346 /* ??? For now, I don't want to deal with compacting the section,
3347 so just nop it out. */
3350 irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3351 info->changed_relocs = TRUE;
3353 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP,
3354 info->contents + irel->r_offset);
3355 info->changed_contents = TRUE;
3361 return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL);
3365 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval,
3366 Elf_Internal_Rela *irel, bfd_boolean is_gd)
3370 Elf_Internal_Rela *gpdisp, *hint;
3371 bfd_boolean dynamic, use_gottprel, pos1_unusable;
3372 unsigned long new_symndx;
3374 dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
3376 /* If a TLS symbol is accessed using IE at least once, there is no point
3377 to use dynamic model for it. */
3378 if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
3381 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3382 then we might as well relax to IE. */
3383 else if (info->link_info->shared && !dynamic
3384 && (info->link_info->flags & DF_STATIC_TLS))
3387 /* Otherwise we must be building an executable to do anything. */
3388 else if (info->link_info->shared)
3391 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3392 the matching LITUSE_TLS relocations. */
3393 if (irel + 2 >= info->relend)
3395 if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
3396 || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
3397 || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
3400 /* There must be a GPDISP relocation positioned immediately after the
3401 LITUSE relocation. */
3402 gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
3403 irel[2].r_offset + 4, R_ALPHA_GPDISP);
3407 pos[0] = info->contents + irel[0].r_offset;
3408 pos[1] = info->contents + irel[1].r_offset;
3409 pos[2] = info->contents + irel[2].r_offset;
3410 pos[3] = info->contents + gpdisp->r_offset;
3411 pos[4] = pos[3] + gpdisp->r_addend;
3412 pos1_unusable = FALSE;
3414 /* Generally, the positions are not allowed to be out of order, lest the
3415 modified insn sequence have different register lifetimes. We can make
3416 an exception when pos 1 is adjacent to pos 0. */
3417 if (pos[1] + 4 == pos[0])
3419 bfd_byte *tmp = pos[0];
3423 else if (pos[1] < pos[0])
3424 pos1_unusable = TRUE;
3425 if (pos[1] >= pos[2] || pos[2] >= pos[3])
3428 /* Reduce the use count on the LITERAL relocation. Do this before we
3429 smash the symndx when we adjust the relocations below. */
3431 struct alpha_elf_got_entry *lit_gotent;
3432 struct alpha_elf_link_hash_entry *lit_h;
3435 BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
3436 indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
3437 lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
3439 while (lit_h->root.root.type == bfd_link_hash_indirect
3440 || lit_h->root.root.type == bfd_link_hash_warning)
3441 lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
3443 for (lit_gotent = lit_h->got_entries; lit_gotent ;
3444 lit_gotent = lit_gotent->next)
3445 if (lit_gotent->gotobj == info->gotobj
3446 && lit_gotent->reloc_type == R_ALPHA_LITERAL
3447 && lit_gotent->addend == irel[1].r_addend)
3449 BFD_ASSERT (lit_gotent);
3451 if (--lit_gotent->use_count == 0)
3453 int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
3454 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
3460 lda $16,x($gp) !tlsgd!1
3461 ldq $27,__tls_get_addr($gp) !literal!1
3462 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3463 ldah $29,0($26) !gpdisp!2
3464 lda $29,0($29) !gpdisp!2
3466 ldq $16,x($gp) !gottprel
3471 or the first pair to
3472 lda $16,x($gp) !tprel
3475 ldah $16,x($gp) !tprelhi
3476 lda $16,x($16) !tprello
3480 use_gottprel = FALSE;
3481 new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : 0;
3482 switch (!dynamic && !info->link_info->shared)
3487 bfd_signed_vma disp;
3489 BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
3490 tp_base = alpha_get_tprel_base (info->link_info);
3491 disp = symval - tp_base;
3493 if (disp >= -0x8000 && disp < 0x8000)
3495 insn = (OP_LDA << 26) | (16 << 21) | (31 << 16);
3496 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
3497 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
3499 irel[0].r_offset = pos[0] - info->contents;
3500 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16);
3501 irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3504 else if (disp >= -(bfd_signed_vma) 0x80000000
3505 && disp < (bfd_signed_vma) 0x7fff8000
3508 insn = (OP_LDAH << 26) | (16 << 21) | (31 << 16);
3509 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
3510 insn = (OP_LDA << 26) | (16 << 21) | (16 << 16);
3511 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
3513 irel[0].r_offset = pos[0] - info->contents;
3514 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI);
3515 irel[1].r_offset = pos[1] - info->contents;
3516 irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO);
3523 use_gottprel = TRUE;
3525 insn = (OP_LDQ << 26) | (16 << 21) | (29 << 16);
3526 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
3527 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
3529 irel[0].r_offset = pos[0] - info->contents;
3530 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL);
3531 irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3535 bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
3537 insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
3538 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
3540 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
3542 irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3543 gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3545 hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
3546 irel[2].r_offset, R_ALPHA_HINT);
3548 hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3550 info->changed_contents = TRUE;
3551 info->changed_relocs = TRUE;
3553 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3554 if (--info->gotent->use_count == 0)
3556 int sz = alpha_got_entry_size (info->gotent->reloc_type);
3557 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
3559 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
3562 /* If we've switched to a GOTTPREL relocation, increment the reference
3563 count on that got entry. */
3566 struct alpha_elf_got_entry *tprel_gotent;
3568 for (tprel_gotent = *info->first_gotent; tprel_gotent ;
3569 tprel_gotent = tprel_gotent->next)
3570 if (tprel_gotent->gotobj == info->gotobj
3571 && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
3572 && tprel_gotent->addend == irel->r_addend)
3575 tprel_gotent->use_count++;
3578 if (info->gotent->use_count == 0)
3579 tprel_gotent = info->gotent;
3582 tprel_gotent = (struct alpha_elf_got_entry *)
3583 bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
3587 tprel_gotent->next = *info->first_gotent;
3588 *info->first_gotent = tprel_gotent;
3590 tprel_gotent->gotobj = info->gotobj;
3591 tprel_gotent->addend = irel->r_addend;
3592 tprel_gotent->got_offset = -1;
3593 tprel_gotent->reloc_done = 0;
3594 tprel_gotent->reloc_xlated = 0;
3597 tprel_gotent->use_count = 1;
3598 tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
3606 elf64_alpha_relax_section (bfd *abfd, asection *sec,
3607 struct bfd_link_info *link_info, bfd_boolean *again)
3609 Elf_Internal_Shdr *symtab_hdr;
3610 Elf_Internal_Rela *internal_relocs;
3611 Elf_Internal_Rela *irel, *irelend;
3612 Elf_Internal_Sym *isymbuf = NULL;
3613 struct alpha_elf_got_entry **local_got_entries;
3614 struct alpha_relax_info info;
3616 /* We are not currently changing any sizes, so only one pass. */
3619 if (link_info->relocatable
3620 || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC))
3621 != (SEC_CODE | SEC_RELOC | SEC_ALLOC))
3622 || sec->reloc_count == 0)
3625 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3626 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
3628 /* Load the relocations for this section. */
3629 internal_relocs = (_bfd_elf_link_read_relocs
3630 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
3631 link_info->keep_memory));
3632 if (internal_relocs == NULL)
3635 memset(&info, 0, sizeof (info));
3638 info.link_info = link_info;
3639 info.symtab_hdr = symtab_hdr;
3640 info.relocs = internal_relocs;
3641 info.relend = irelend = internal_relocs + sec->reloc_count;
3643 /* Find the GP for this object. Do not store the result back via
3644 _bfd_set_gp_value, since this could change again before final. */
3645 info.gotobj = alpha_elf_tdata (abfd)->gotobj;
3648 asection *sgot = alpha_elf_tdata (info.gotobj)->got;
3649 info.gp = (sgot->output_section->vma
3650 + sgot->output_offset
3654 /* Get the section contents. */
3655 if (elf_section_data (sec)->this_hdr.contents != NULL)
3656 info.contents = elf_section_data (sec)->this_hdr.contents;
3659 if (!bfd_malloc_and_get_section (abfd, sec, &info.contents))
3663 for (irel = internal_relocs; irel < irelend; irel++)
3666 struct alpha_elf_got_entry *gotent;
3667 unsigned long r_type = ELF64_R_TYPE (irel->r_info);
3668 unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
3670 /* Early exit for unhandled or unrelaxable relocations. */
3673 case R_ALPHA_LITERAL:
3674 case R_ALPHA_GPRELHIGH:
3675 case R_ALPHA_GPRELLOW:
3676 case R_ALPHA_GOTDTPREL:
3677 case R_ALPHA_GOTTPREL:
3681 case R_ALPHA_TLSLDM:
3682 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3683 reloc to the 0 symbol so that they all match. */
3691 /* Get the value of the symbol referred to by the reloc. */
3692 if (r_symndx < symtab_hdr->sh_info)
3694 /* A local symbol. */
3695 Elf_Internal_Sym *isym;
3697 /* Read this BFD's local symbols. */
3698 if (isymbuf == NULL)
3700 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3701 if (isymbuf == NULL)
3702 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
3703 symtab_hdr->sh_info, 0,
3705 if (isymbuf == NULL)
3709 isym = isymbuf + r_symndx;
3711 /* Given the symbol for a TLSLDM reloc is ignored, this also
3712 means forcing the symbol value to the tp base. */
3713 if (r_type == R_ALPHA_TLSLDM)
3715 info.tsec = bfd_abs_section_ptr;
3716 symval = alpha_get_tprel_base (info.link_info);
3720 symval = isym->st_value;
3721 if (isym->st_shndx == SHN_UNDEF)
3723 else if (isym->st_shndx == SHN_ABS)
3724 info.tsec = bfd_abs_section_ptr;
3725 else if (isym->st_shndx == SHN_COMMON)
3726 info.tsec = bfd_com_section_ptr;
3728 info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3732 info.other = isym->st_other;
3733 if (local_got_entries)
3734 info.first_gotent = &local_got_entries[r_symndx];
3737 info.first_gotent = &info.gotent;
3744 struct alpha_elf_link_hash_entry *h;
3746 indx = r_symndx - symtab_hdr->sh_info;
3747 h = alpha_elf_sym_hashes (abfd)[indx];
3748 BFD_ASSERT (h != NULL);
3750 while (h->root.root.type == bfd_link_hash_indirect
3751 || h->root.root.type == bfd_link_hash_warning)
3752 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3754 /* If the symbol is undefined, we can't do anything with it. */
3755 if (h->root.root.type == bfd_link_hash_undefined)
3758 /* If the symbol isn't defined in the current module,
3759 again we can't do anything. */
3760 if (h->root.root.type == bfd_link_hash_undefweak)
3762 info.tsec = bfd_abs_section_ptr;
3765 else if (!h->root.def_regular)
3767 /* Except for TLSGD relocs, which can sometimes be
3768 relaxed to GOTTPREL relocs. */
3769 if (r_type != R_ALPHA_TLSGD)
3771 info.tsec = bfd_abs_section_ptr;
3776 info.tsec = h->root.root.u.def.section;
3777 symval = h->root.root.u.def.value;
3781 info.other = h->root.other;
3782 info.first_gotent = &h->got_entries;
3785 /* Search for the got entry to be used by this relocation. */
3786 for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
3787 if (gotent->gotobj == info.gotobj
3788 && gotent->reloc_type == r_type
3789 && gotent->addend == irel->r_addend)
3791 info.gotent = gotent;
3793 symval += info.tsec->output_section->vma + info.tsec->output_offset;
3794 symval += irel->r_addend;
3798 case R_ALPHA_LITERAL:
3799 BFD_ASSERT(info.gotent != NULL);
3801 /* If there exist LITUSE relocations immediately following, this
3802 opens up all sorts of interesting optimizations, because we
3803 now know every location that this address load is used. */
3804 if (irel+1 < irelend
3805 && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
3807 if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
3812 if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
3817 case R_ALPHA_GOTDTPREL:
3818 case R_ALPHA_GOTTPREL:
3819 BFD_ASSERT(info.gotent != NULL);
3820 if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
3825 case R_ALPHA_TLSLDM:
3826 BFD_ASSERT(info.gotent != NULL);
3827 if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
3828 r_type == R_ALPHA_TLSGD))
3834 if (!elf64_alpha_size_plt_section (link_info))
3836 if (!elf64_alpha_size_got_sections (link_info))
3838 if (!elf64_alpha_size_rela_got_section (link_info))
3842 && symtab_hdr->contents != (unsigned char *) isymbuf)
3844 if (!link_info->keep_memory)
3848 /* Cache the symbols for elf_link_input_bfd. */
3849 symtab_hdr->contents = (unsigned char *) isymbuf;
3853 if (info.contents != NULL
3854 && elf_section_data (sec)->this_hdr.contents != info.contents)
3856 if (!info.changed_contents && !link_info->keep_memory)
3857 free (info.contents);
3860 /* Cache the section contents for elf_link_input_bfd. */
3861 elf_section_data (sec)->this_hdr.contents = info.contents;
3865 if (elf_section_data (sec)->relocs != internal_relocs)
3867 if (!info.changed_relocs)
3868 free (internal_relocs);
3870 elf_section_data (sec)->relocs = internal_relocs;
3873 *again = info.changed_contents || info.changed_relocs;
3879 && symtab_hdr->contents != (unsigned char *) isymbuf)
3881 if (info.contents != NULL
3882 && elf_section_data (sec)->this_hdr.contents != info.contents)
3883 free (info.contents);
3884 if (internal_relocs != NULL
3885 && elf_section_data (sec)->relocs != internal_relocs)
3886 free (internal_relocs);
3890 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
3891 into the next available slot in SREL. */
3894 elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info,
3895 asection *sec, asection *srel, bfd_vma offset,
3896 long dynindx, long rtype, bfd_vma addend)
3898 Elf_Internal_Rela outrel;
3901 BFD_ASSERT (srel != NULL);
3903 outrel.r_info = ELF64_R_INFO (dynindx, rtype);
3904 outrel.r_addend = addend;
3906 offset = _bfd_elf_section_offset (abfd, info, sec, offset);
3907 if ((offset | 1) != (bfd_vma) -1)
3908 outrel.r_offset = sec->output_section->vma + sec->output_offset + offset;
3910 memset (&outrel, 0, sizeof (outrel));
3912 loc = srel->contents;
3913 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
3914 bfd_elf64_swap_reloca_out (abfd, &outrel, loc);
3915 BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size);
3918 /* Relocate an Alpha ELF section for a relocatable link.
3920 We don't have to change anything unless the reloc is against a section
3921 symbol, in which case we have to adjust according to where the section
3922 symbol winds up in the output section. */
3925 elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED,
3926 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3927 bfd *input_bfd, asection *input_section,
3928 bfd_byte *contents ATTRIBUTE_UNUSED,
3929 Elf_Internal_Rela *relocs,
3930 Elf_Internal_Sym *local_syms,
3931 asection **local_sections)
3933 unsigned long symtab_hdr_sh_info;
3934 Elf_Internal_Rela *rel;
3935 Elf_Internal_Rela *relend;
3936 bfd_boolean ret_val = TRUE;
3938 symtab_hdr_sh_info = elf_tdata (input_bfd)->symtab_hdr.sh_info;
3940 relend = relocs + input_section->reloc_count;
3941 for (rel = relocs; rel < relend; rel++)
3943 unsigned long r_symndx;
3944 Elf_Internal_Sym *sym;
3946 unsigned long r_type;
3948 r_type = ELF64_R_TYPE(rel->r_info);
3949 if (r_type >= R_ALPHA_max)
3951 (*_bfd_error_handler)
3952 (_("%B: unknown relocation type %d"),
3953 input_bfd, (int) r_type);
3954 bfd_set_error (bfd_error_bad_value);
3959 r_symndx = ELF64_R_SYM(rel->r_info);
3961 /* The symbol associated with GPDISP and LITUSE is
3962 immaterial. Only the addend is significant. */
3963 if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
3966 if (r_symndx < symtab_hdr_sh_info)
3968 sym = local_syms + r_symndx;
3969 if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
3971 sec = local_sections[r_symndx];
3972 rel->r_addend += sec->output_offset + sym->st_value;
3980 /* Relocate an Alpha ELF section. */
3983 elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
3984 bfd *input_bfd, asection *input_section,
3985 bfd_byte *contents, Elf_Internal_Rela *relocs,
3986 Elf_Internal_Sym *local_syms,
3987 asection **local_sections)
3989 Elf_Internal_Shdr *symtab_hdr;
3990 Elf_Internal_Rela *rel;
3991 Elf_Internal_Rela *relend;
3992 asection *sgot, *srel, *srelgot;
3993 bfd *dynobj, *gotobj;
3994 bfd_vma gp, tp_base, dtp_base;
3995 struct alpha_elf_got_entry **local_got_entries;
3996 bfd_boolean ret_val;
3998 /* Handle relocatable links with a smaller loop. */
3999 if (info->relocatable)
4000 return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd,
4001 input_section, contents, relocs,
4002 local_syms, local_sections);
4004 /* This is a final link. */
4008 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4010 dynobj = elf_hash_table (info)->dynobj;
4012 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
4016 if (input_section->flags & SEC_ALLOC)
4018 const char *section_name;
4019 section_name = (bfd_elf_string_from_elf_section
4020 (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
4021 elf_section_data(input_section)->rel_hdr.sh_name));
4022 BFD_ASSERT(section_name != NULL);
4023 srel = bfd_get_section_by_name (dynobj, section_name);
4028 /* Find the gp value for this input bfd. */
4029 gotobj = alpha_elf_tdata (input_bfd)->gotobj;
4032 sgot = alpha_elf_tdata (gotobj)->got;
4033 gp = _bfd_get_gp_value (gotobj);
4036 gp = (sgot->output_section->vma
4037 + sgot->output_offset
4039 _bfd_set_gp_value (gotobj, gp);
4048 local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries;
4050 if (elf_hash_table (info)->tls_sec != NULL)
4052 dtp_base = alpha_get_dtprel_base (info);
4053 tp_base = alpha_get_tprel_base (info);
4056 dtp_base = tp_base = 0;
4058 relend = relocs + input_section->reloc_count;
4059 for (rel = relocs; rel < relend; rel++)
4061 struct alpha_elf_link_hash_entry *h = NULL;
4062 struct alpha_elf_got_entry *gotent;
4063 bfd_reloc_status_type r;
4064 reloc_howto_type *howto;
4065 unsigned long r_symndx;
4066 Elf_Internal_Sym *sym = NULL;
4067 asection *sec = NULL;
4070 bfd_boolean dynamic_symbol_p;
4071 bfd_boolean undef_weak_ref = FALSE;
4072 unsigned long r_type;
4074 r_type = ELF64_R_TYPE(rel->r_info);
4075 if (r_type >= R_ALPHA_max)
4077 (*_bfd_error_handler)
4078 (_("%B: unknown relocation type %d"),
4079 input_bfd, (int) r_type);
4080 bfd_set_error (bfd_error_bad_value);
4085 howto = elf64_alpha_howto_table + r_type;
4086 r_symndx = ELF64_R_SYM(rel->r_info);
4088 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4089 reloc to the 0 symbol so that they all match. */
4090 if (r_type == R_ALPHA_TLSLDM)
4093 if (r_symndx < symtab_hdr->sh_info)
4096 sym = local_syms + r_symndx;
4097 sec = local_sections[r_symndx];
4099 value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
4101 /* If this is a tp-relative relocation against sym 0,
4102 this is hackery from relax_section. Force the value to
4103 be the tls module base. */
4105 && (r_type == R_ALPHA_TLSLDM
4106 || r_type == R_ALPHA_GOTTPREL
4107 || r_type == R_ALPHA_TPREL64
4108 || r_type == R_ALPHA_TPRELHI
4109 || r_type == R_ALPHA_TPRELLO
4110 || r_type == R_ALPHA_TPREL16))
4113 if (local_got_entries)
4114 gotent = local_got_entries[r_symndx];
4118 /* Need to adjust local GOT entries' addends for SEC_MERGE
4119 unless it has been done already. */
4120 if ((sec->flags & SEC_MERGE)
4121 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
4122 && sec->sec_info_type == ELF_INFO_TYPE_MERGE
4124 && !gotent->reloc_xlated)
4126 struct alpha_elf_got_entry *ent;
4128 for (ent = gotent; ent; ent = ent->next)
4130 ent->reloc_xlated = 1;
4131 if (ent->use_count == 0)
4135 _bfd_merged_section_offset (output_bfd, &msec,
4136 elf_section_data (sec)->
4138 sym->st_value + ent->addend);
4139 ent->addend -= sym->st_value;
4140 ent->addend += msec->output_section->vma
4141 + msec->output_offset
4142 - sec->output_section->vma
4143 - sec->output_offset;
4147 dynamic_symbol_p = FALSE;
4152 bfd_boolean unresolved_reloc;
4153 struct elf_link_hash_entry *hh;
4154 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
4156 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4157 r_symndx, symtab_hdr, sym_hashes,
4159 unresolved_reloc, warned);
4165 && ! unresolved_reloc
4166 && hh->root.type == bfd_link_hash_undefweak)
4167 undef_weak_ref = TRUE;
4169 h = (struct alpha_elf_link_hash_entry *) hh;
4170 dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
4171 gotent = h->got_entries;
4174 addend = rel->r_addend;
4177 /* Search for the proper got entry. */
4178 for (; gotent ; gotent = gotent->next)
4179 if (gotent->gotobj == gotobj
4180 && gotent->reloc_type == r_type
4181 && gotent->addend == addend)
4186 case R_ALPHA_GPDISP:
4188 bfd_byte *p_ldah, *p_lda;
4190 BFD_ASSERT(gp != 0);
4192 value = (input_section->output_section->vma
4193 + input_section->output_offset
4196 p_ldah = contents + rel->r_offset;
4197 p_lda = p_ldah + rel->r_addend;
4199 r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value,
4204 case R_ALPHA_LITERAL:
4205 BFD_ASSERT(sgot != NULL);
4206 BFD_ASSERT(gp != 0);
4207 BFD_ASSERT(gotent != NULL);
4208 BFD_ASSERT(gotent->use_count >= 1);
4210 if (!gotent->reloc_done)
4212 gotent->reloc_done = 1;
4214 bfd_put_64 (output_bfd, value,
4215 sgot->contents + gotent->got_offset);
4217 /* If the symbol has been forced local, output a
4218 RELATIVE reloc, otherwise it will be handled in
4219 finish_dynamic_symbol. */
4220 if (info->shared && !dynamic_symbol_p && !undef_weak_ref)
4221 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4222 gotent->got_offset, 0,
4223 R_ALPHA_RELATIVE, value);
4226 value = (sgot->output_section->vma
4227 + sgot->output_offset
4228 + gotent->got_offset);
4232 case R_ALPHA_GPREL32:
4233 /* If the target section was a removed linkonce section,
4234 r_symndx will be zero. In this case, assume that the
4235 switch will not be used, so don't fill it in. If we
4236 do nothing here, we'll get relocation truncated messages,
4237 due to the placement of the application above 4GB. */
4245 case R_ALPHA_GPREL16:
4246 case R_ALPHA_GPRELLOW:
4247 if (dynamic_symbol_p)
4249 (*_bfd_error_handler)
4250 (_("%B: gp-relative relocation against dynamic symbol %s"),
4251 input_bfd, h->root.root.root.string);
4254 BFD_ASSERT(gp != 0);
4258 case R_ALPHA_GPRELHIGH:
4259 if (dynamic_symbol_p)
4261 (*_bfd_error_handler)
4262 (_("%B: gp-relative relocation against dynamic symbol %s"),
4263 input_bfd, h->root.root.root.string);
4266 BFD_ASSERT(gp != 0);
4268 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4272 /* A call to a dynamic symbol is definitely out of range of
4273 the 16-bit displacement. Don't bother writing anything. */
4274 if (dynamic_symbol_p)
4279 /* The regular PC-relative stuff measures from the start of
4280 the instruction rather than the end. */
4284 case R_ALPHA_BRADDR:
4285 if (dynamic_symbol_p)
4287 (*_bfd_error_handler)
4288 (_("%B: pc-relative relocation against dynamic symbol %s"),
4289 input_bfd, h->root.root.root.string);
4292 /* The regular PC-relative stuff measures from the start of
4293 the instruction rather than the end. */
4302 /* The regular PC-relative stuff measures from the start of
4303 the instruction rather than the end. */
4306 /* The source and destination gp must be the same. Note that
4307 the source will always have an assigned gp, since we forced
4308 one in check_relocs, but that the destination may not, as
4309 it might not have had any relocations at all. Also take
4310 care not to crash if H is an undefined symbol. */
4311 if (h != NULL && sec != NULL
4312 && alpha_elf_tdata (sec->owner)->gotobj
4313 && gotobj != alpha_elf_tdata (sec->owner)->gotobj)
4315 (*_bfd_error_handler)
4316 (_("%B: change in gp: BRSGP %s"),
4317 input_bfd, h->root.root.root.string);
4321 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4323 other = h->root.other;
4325 other = sym->st_other;
4326 switch (other & STO_ALPHA_STD_GPLOAD)
4328 case STO_ALPHA_NOPV:
4330 case STO_ALPHA_STD_GPLOAD:
4335 name = h->root.root.root.string;
4338 name = (bfd_elf_string_from_elf_section
4339 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4341 name = _("<unknown>");
4342 else if (name[0] == 0)
4343 name = bfd_section_name (input_bfd, sec);
4345 (*_bfd_error_handler)
4346 (_("%B: !samegp reloc against symbol without .prologue: %s"),
4355 case R_ALPHA_REFLONG:
4356 case R_ALPHA_REFQUAD:
4357 case R_ALPHA_DTPREL64:
4358 case R_ALPHA_TPREL64:
4360 long dynindx, dyntype = r_type;
4363 /* Careful here to remember RELATIVE relocations for global
4364 variables for symbolic shared objects. */
4366 if (dynamic_symbol_p)
4368 BFD_ASSERT(h->root.dynindx != -1);
4369 dynindx = h->root.dynindx;
4371 addend = 0, value = 0;
4373 else if (r_type == R_ALPHA_DTPREL64)
4375 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4379 else if (r_type == R_ALPHA_TPREL64)
4381 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4388 dynaddend = value - dtp_base;
4390 else if (info->shared
4392 && (input_section->flags & SEC_ALLOC)
4395 if (r_type == R_ALPHA_REFLONG)
4397 (*_bfd_error_handler)
4398 (_("%B: unhandled dynamic relocation against %s"),
4400 h->root.root.root.string);
4404 dyntype = R_ALPHA_RELATIVE;
4410 if (input_section->flags & SEC_ALLOC)
4411 elf64_alpha_emit_dynrel (output_bfd, info, input_section,
4412 srel, rel->r_offset, dynindx,
4413 dyntype, dynaddend);
4417 case R_ALPHA_SREL16:
4418 case R_ALPHA_SREL32:
4419 case R_ALPHA_SREL64:
4420 if (dynamic_symbol_p)
4422 (*_bfd_error_handler)
4423 (_("%B: pc-relative relocation against dynamic symbol %s"),
4424 input_bfd, h->root.root.root.string);
4427 else if ((info->shared || info->pie) && undef_weak_ref)
4429 (*_bfd_error_handler)
4430 (_("%B: pc-relative relocation against undefined weak symbol %s"),
4431 input_bfd, h->root.root.root.string);
4436 /* ??? .eh_frame references to discarded sections will be smashed
4437 to relocations against SHN_UNDEF. The .eh_frame format allows
4438 NULL to be encoded as 0 in any format, so this works here. */
4440 howto = (elf64_alpha_howto_table
4441 + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
4444 case R_ALPHA_TLSLDM:
4445 /* Ignore the symbol for the relocation. The result is always
4446 the current module. */
4447 dynamic_symbol_p = 0;
4451 if (!gotent->reloc_done)
4453 gotent->reloc_done = 1;
4455 /* Note that the module index for the main program is 1. */
4456 bfd_put_64 (output_bfd, !info->shared && !dynamic_symbol_p,
4457 sgot->contents + gotent->got_offset);
4459 /* If the symbol has been forced local, output a
4460 DTPMOD64 reloc, otherwise it will be handled in
4461 finish_dynamic_symbol. */
4462 if (info->shared && !dynamic_symbol_p)
4463 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4464 gotent->got_offset, 0,
4465 R_ALPHA_DTPMOD64, 0);
4467 if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM)
4471 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4474 bfd_put_64 (output_bfd, value,
4475 sgot->contents + gotent->got_offset + 8);
4478 value = (sgot->output_section->vma
4479 + sgot->output_offset
4480 + gotent->got_offset);
4484 case R_ALPHA_DTPRELHI:
4485 case R_ALPHA_DTPRELLO:
4486 case R_ALPHA_DTPREL16:
4487 if (dynamic_symbol_p)
4489 (*_bfd_error_handler)
4490 (_("%B: dtp-relative relocation against dynamic symbol %s"),
4491 input_bfd, h->root.root.root.string);
4494 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4496 if (r_type == R_ALPHA_DTPRELHI)
4497 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4500 case R_ALPHA_TPRELHI:
4501 case R_ALPHA_TPRELLO:
4502 case R_ALPHA_TPREL16:
4505 (*_bfd_error_handler)
4506 (_("%B: TLS local exec code cannot be linked into shared objects"),
4510 else if (dynamic_symbol_p)
4512 (*_bfd_error_handler)
4513 (_("%B: tp-relative relocation against dynamic symbol %s"),
4514 input_bfd, h->root.root.root.string);
4517 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4519 if (r_type == R_ALPHA_TPRELHI)
4520 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4523 case R_ALPHA_GOTDTPREL:
4524 case R_ALPHA_GOTTPREL:
4525 BFD_ASSERT(sgot != NULL);
4526 BFD_ASSERT(gp != 0);
4527 BFD_ASSERT(gotent != NULL);
4528 BFD_ASSERT(gotent->use_count >= 1);
4530 if (!gotent->reloc_done)
4532 gotent->reloc_done = 1;
4534 if (dynamic_symbol_p)
4538 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4539 if (r_type == R_ALPHA_GOTDTPREL)
4541 else if (!info->shared)
4545 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4546 gotent->got_offset, 0,
4552 bfd_put_64 (output_bfd, value,
4553 sgot->contents + gotent->got_offset);
4556 value = (sgot->output_section->vma
4557 + sgot->output_offset
4558 + gotent->got_offset);
4564 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4565 contents, rel->r_offset, value, 0);
4574 case bfd_reloc_overflow:
4578 /* Don't warn if the overflow is due to pc relative reloc
4579 against discarded section. Section optimization code should
4582 if (r_symndx < symtab_hdr->sh_info
4583 && sec != NULL && howto->pc_relative
4584 && elf_discarded_section (sec))
4591 name = (bfd_elf_string_from_elf_section
4592 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4596 name = bfd_section_name (input_bfd, sec);
4598 if (! ((*info->callbacks->reloc_overflow)
4599 (info, (h ? &h->root.root : NULL), name, howto->name,
4600 (bfd_vma) 0, input_bfd, input_section,
4607 case bfd_reloc_outofrange:
4615 /* Finish up dynamic symbol handling. We set the contents of various
4616 dynamic sections here. */
4619 elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
4620 struct elf_link_hash_entry *h,
4621 Elf_Internal_Sym *sym)
4623 struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h;
4624 bfd *dynobj = elf_hash_table(info)->dynobj;
4628 /* Fill in the .plt entry for this symbol. */
4629 asection *splt, *sgot, *srel;
4630 Elf_Internal_Rela outrel;
4632 bfd_vma got_addr, plt_addr;
4634 struct alpha_elf_got_entry *gotent;
4636 BFD_ASSERT (h->dynindx != -1);
4638 splt = bfd_get_section_by_name (dynobj, ".plt");
4639 BFD_ASSERT (splt != NULL);
4640 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4641 BFD_ASSERT (srel != NULL);
4643 for (gotent = ah->got_entries; gotent ; gotent = gotent->next)
4644 if (gotent->reloc_type == R_ALPHA_LITERAL
4645 && gotent->use_count > 0)
4650 sgot = alpha_elf_tdata (gotent->gotobj)->got;
4651 BFD_ASSERT (sgot != NULL);
4653 BFD_ASSERT (gotent->got_offset != -1);
4654 BFD_ASSERT (gotent->plt_offset != -1);
4656 got_addr = (sgot->output_section->vma
4657 + sgot->output_offset
4658 + gotent->got_offset);
4659 plt_addr = (splt->output_section->vma
4660 + splt->output_offset
4661 + gotent->plt_offset);
4663 plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
4665 /* Fill in the entry in the procedure linkage table. */
4666 if (elf64_alpha_use_secureplt)
4668 disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4);
4669 insn = INSN_AD (INSN_BR, 31, disp);
4670 bfd_put_32 (output_bfd, insn,
4671 splt->contents + gotent->plt_offset);
4673 plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE)
4674 / NEW_PLT_ENTRY_SIZE);
4678 disp = -(gotent->plt_offset + 4);
4679 insn = INSN_AD (INSN_BR, 28, disp);
4680 bfd_put_32 (output_bfd, insn,
4681 splt->contents + gotent->plt_offset);
4682 bfd_put_32 (output_bfd, INSN_UNOP,
4683 splt->contents + gotent->plt_offset + 4);
4684 bfd_put_32 (output_bfd, INSN_UNOP,
4685 splt->contents + gotent->plt_offset + 8);
4687 plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE)
4688 / OLD_PLT_ENTRY_SIZE);
4691 /* Fill in the entry in the .rela.plt section. */
4692 outrel.r_offset = got_addr;
4693 outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
4694 outrel.r_addend = 0;
4696 loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
4697 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
4699 /* Fill in the entry in the .got. */
4700 bfd_put_64 (output_bfd, plt_addr,
4701 sgot->contents + gotent->got_offset);
4704 else if (alpha_elf_dynamic_symbol_p (h, info))
4706 /* Fill in the dynamic relocations for this symbol's .got entries. */
4708 struct alpha_elf_got_entry *gotent;
4710 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4711 BFD_ASSERT (srel != NULL);
4713 for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
4715 gotent = gotent->next)
4720 if (gotent->use_count == 0)
4723 sgot = alpha_elf_tdata (gotent->gotobj)->got;
4725 r_type = gotent->reloc_type;
4728 case R_ALPHA_LITERAL:
4729 r_type = R_ALPHA_GLOB_DAT;
4732 r_type = R_ALPHA_DTPMOD64;
4734 case R_ALPHA_GOTDTPREL:
4735 r_type = R_ALPHA_DTPREL64;
4737 case R_ALPHA_GOTTPREL:
4738 r_type = R_ALPHA_TPREL64;
4740 case R_ALPHA_TLSLDM:
4745 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4746 gotent->got_offset, h->dynindx,
4747 r_type, gotent->addend);
4749 if (gotent->reloc_type == R_ALPHA_TLSGD)
4750 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4751 gotent->got_offset + 8, h->dynindx,
4752 R_ALPHA_DTPREL64, gotent->addend);
4756 /* Mark some specially defined symbols as absolute. */
4757 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4758 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
4759 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
4760 sym->st_shndx = SHN_ABS;
4765 /* Finish up the dynamic sections. */
4768 elf64_alpha_finish_dynamic_sections (bfd *output_bfd,
4769 struct bfd_link_info *info)
4774 dynobj = elf_hash_table (info)->dynobj;
4775 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4777 if (elf_hash_table (info)->dynamic_sections_created)
4779 asection *splt, *sgotplt, *srelaplt;
4780 Elf64_External_Dyn *dyncon, *dynconend;
4781 bfd_vma plt_vma, gotplt_vma;
4783 splt = bfd_get_section_by_name (dynobj, ".plt");
4784 srelaplt = bfd_get_section_by_name (output_bfd, ".rela.plt");
4785 BFD_ASSERT (splt != NULL && sdyn != NULL);
4787 plt_vma = splt->output_section->vma + splt->output_offset;
4790 if (elf64_alpha_use_secureplt)
4792 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
4793 BFD_ASSERT (sgotplt != NULL);
4794 if (sgotplt->size > 0)
4795 gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset;
4798 dyncon = (Elf64_External_Dyn *) sdyn->contents;
4799 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
4800 for (; dyncon < dynconend; dyncon++)
4802 Elf_Internal_Dyn dyn;
4804 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
4810 = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma;
4813 dyn.d_un.d_val = srelaplt ? srelaplt->size : 0;
4816 dyn.d_un.d_ptr = srelaplt ? srelaplt->vma : 0;
4820 /* My interpretation of the TIS v1.1 ELF document indicates
4821 that RELASZ should not include JMPREL. This is not what
4822 the rest of the BFD does. It is, however, what the
4823 glibc ld.so wants. Do this fixup here until we found
4824 out who is right. */
4826 dyn.d_un.d_val -= srelaplt->size;
4830 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
4833 /* Initialize the plt header. */
4839 if (elf64_alpha_use_secureplt)
4841 ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE);
4843 insn = INSN_ABC (INSN_SUBQ, 27, 28, 25);
4844 bfd_put_32 (output_bfd, insn, splt->contents);
4846 insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16);
4847 bfd_put_32 (output_bfd, insn, splt->contents + 4);
4849 insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25);
4850 bfd_put_32 (output_bfd, insn, splt->contents + 8);
4852 insn = INSN_ABO (INSN_LDA, 28, 28, ofs);
4853 bfd_put_32 (output_bfd, insn, splt->contents + 12);
4855 insn = INSN_ABO (INSN_LDQ, 27, 28, 0);
4856 bfd_put_32 (output_bfd, insn, splt->contents + 16);
4858 insn = INSN_ABC (INSN_ADDQ, 25, 25, 25);
4859 bfd_put_32 (output_bfd, insn, splt->contents + 20);
4861 insn = INSN_ABO (INSN_LDQ, 28, 28, 8);
4862 bfd_put_32 (output_bfd, insn, splt->contents + 24);
4864 insn = INSN_AB (INSN_JMP, 31, 27);
4865 bfd_put_32 (output_bfd, insn, splt->contents + 28);
4867 insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE);
4868 bfd_put_32 (output_bfd, insn, splt->contents + 32);
4872 insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */
4873 bfd_put_32 (output_bfd, insn, splt->contents);
4875 insn = INSN_ABO (INSN_LDQ, 27, 27, 12);
4876 bfd_put_32 (output_bfd, insn, splt->contents + 4);
4879 bfd_put_32 (output_bfd, insn, splt->contents + 8);
4881 insn = INSN_AB (INSN_JMP, 27, 27);
4882 bfd_put_32 (output_bfd, insn, splt->contents + 12);
4884 /* The next two words will be filled in by ld.so. */
4885 bfd_put_64 (output_bfd, 0, splt->contents + 16);
4886 bfd_put_64 (output_bfd, 0, splt->contents + 24);
4889 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0;
4896 /* We need to use a special link routine to handle the .mdebug section.
4897 We need to merge all instances of these sections together, not write
4898 them all out sequentially. */
4901 elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info)
4904 struct bfd_link_order *p;
4905 asection *mdebug_sec;
4906 struct ecoff_debug_info debug;
4907 const struct ecoff_debug_swap *swap
4908 = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
4909 HDRR *symhdr = &debug.symbolic_header;
4910 PTR mdebug_handle = NULL;
4912 /* Go through the sections and collect the mdebug information. */
4914 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
4916 if (strcmp (o->name, ".mdebug") == 0)
4918 struct extsym_info einfo;
4920 /* We have found the .mdebug section in the output file.
4921 Look through all the link_orders comprising it and merge
4922 the information together. */
4923 symhdr->magic = swap->sym_magic;
4924 /* FIXME: What should the version stamp be? */
4926 symhdr->ilineMax = 0;
4930 symhdr->isymMax = 0;
4931 symhdr->ioptMax = 0;
4932 symhdr->iauxMax = 0;
4934 symhdr->issExtMax = 0;
4937 symhdr->iextMax = 0;
4939 /* We accumulate the debugging information itself in the
4940 debug_info structure. */
4942 debug.external_dnr = NULL;
4943 debug.external_pdr = NULL;
4944 debug.external_sym = NULL;
4945 debug.external_opt = NULL;
4946 debug.external_aux = NULL;
4948 debug.ssext = debug.ssext_end = NULL;
4949 debug.external_fdr = NULL;
4950 debug.external_rfd = NULL;
4951 debug.external_ext = debug.external_ext_end = NULL;
4953 mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
4954 if (mdebug_handle == (PTR) NULL)
4963 static const char * const name[] =
4965 ".text", ".init", ".fini", ".data",
4966 ".rodata", ".sdata", ".sbss", ".bss"
4968 static const int sc[] = { scText, scInit, scFini, scData,
4969 scRData, scSData, scSBss, scBss };
4972 esym.cobol_main = 0;
4976 esym.asym.iss = issNil;
4977 esym.asym.st = stLocal;
4978 esym.asym.reserved = 0;
4979 esym.asym.index = indexNil;
4980 for (i = 0; i < 8; i++)
4982 esym.asym.sc = sc[i];
4983 s = bfd_get_section_by_name (abfd, name[i]);
4986 esym.asym.value = s->vma;
4987 last = s->vma + s->size;
4990 esym.asym.value = last;
4992 if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
4998 for (p = o->map_head.link_order;
4999 p != (struct bfd_link_order *) NULL;
5002 asection *input_section;
5004 const struct ecoff_debug_swap *input_swap;
5005 struct ecoff_debug_info input_debug;
5009 if (p->type != bfd_indirect_link_order)
5011 if (p->type == bfd_data_link_order)
5016 input_section = p->u.indirect.section;
5017 input_bfd = input_section->owner;
5019 if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
5020 || (get_elf_backend_data (input_bfd)
5021 ->elf_backend_ecoff_debug_swap) == NULL)
5023 /* I don't know what a non ALPHA ELF bfd would be
5024 doing with a .mdebug section, but I don't really
5025 want to deal with it. */
5029 input_swap = (get_elf_backend_data (input_bfd)
5030 ->elf_backend_ecoff_debug_swap);
5032 BFD_ASSERT (p->size == input_section->size);
5034 /* The ECOFF linking code expects that we have already
5035 read in the debugging information and set up an
5036 ecoff_debug_info structure, so we do that now. */
5037 if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
5041 if (! (bfd_ecoff_debug_accumulate
5042 (mdebug_handle, abfd, &debug, swap, input_bfd,
5043 &input_debug, input_swap, info)))
5046 /* Loop through the external symbols. For each one with
5047 interesting information, try to find the symbol in
5048 the linker global hash table and save the information
5049 for the output external symbols. */
5050 eraw_src = input_debug.external_ext;
5051 eraw_end = (eraw_src
5052 + (input_debug.symbolic_header.iextMax
5053 * input_swap->external_ext_size));
5055 eraw_src < eraw_end;
5056 eraw_src += input_swap->external_ext_size)
5060 struct alpha_elf_link_hash_entry *h;
5062 (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
5063 if (ext.asym.sc == scNil
5064 || ext.asym.sc == scUndefined
5065 || ext.asym.sc == scSUndefined)
5068 name = input_debug.ssext + ext.asym.iss;
5069 h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info),
5070 name, FALSE, FALSE, TRUE);
5071 if (h == NULL || h->esym.ifd != -2)
5077 < input_debug.symbolic_header.ifdMax);
5078 ext.ifd = input_debug.ifdmap[ext.ifd];
5084 /* Free up the information we just read. */
5085 free (input_debug.line);
5086 free (input_debug.external_dnr);
5087 free (input_debug.external_pdr);
5088 free (input_debug.external_sym);
5089 free (input_debug.external_opt);
5090 free (input_debug.external_aux);
5091 free (input_debug.ss);
5092 free (input_debug.ssext);
5093 free (input_debug.external_fdr);
5094 free (input_debug.external_rfd);
5095 free (input_debug.external_ext);
5097 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5098 elf_link_input_bfd ignores this section. */
5099 input_section->flags &=~ SEC_HAS_CONTENTS;
5102 /* Build the external symbol information. */
5105 einfo.debug = &debug;
5107 einfo.failed = FALSE;
5108 elf_link_hash_traverse (elf_hash_table (info),
5109 elf64_alpha_output_extsym,
5114 /* Set the size of the .mdebug section. */
5115 o->size = bfd_ecoff_debug_size (abfd, &debug, swap);
5117 /* Skip this section later on (I don't think this currently
5118 matters, but someday it might). */
5119 o->map_head.link_order = (struct bfd_link_order *) NULL;
5125 /* Invoke the regular ELF backend linker to do all the work. */
5126 if (! bfd_elf_final_link (abfd, info))
5129 /* Now write out the computed sections. */
5131 /* The .got subsections... */
5133 bfd *i, *dynobj = elf_hash_table(info)->dynobj;
5134 for (i = alpha_elf_hash_table(info)->got_list;
5136 i = alpha_elf_tdata(i)->got_link_next)
5140 /* elf_bfd_final_link already did everything in dynobj. */
5144 sgot = alpha_elf_tdata(i)->got;
5145 if (! bfd_set_section_contents (abfd, sgot->output_section,
5147 (file_ptr) sgot->output_offset,
5153 if (mdebug_sec != (asection *) NULL)
5155 BFD_ASSERT (abfd->output_has_begun);
5156 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
5158 mdebug_sec->filepos))
5161 bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
5167 static enum elf_reloc_type_class
5168 elf64_alpha_reloc_type_class (const Elf_Internal_Rela *rela)
5170 switch ((int) ELF64_R_TYPE (rela->r_info))
5172 case R_ALPHA_RELATIVE:
5173 return reloc_class_relative;
5174 case R_ALPHA_JMP_SLOT:
5175 return reloc_class_plt;
5177 return reloc_class_copy;
5179 return reloc_class_normal;
5183 static struct bfd_elf_special_section const
5184 alpha_special_sections_s[]=
5186 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
5187 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
5188 { NULL, 0, 0, 0, 0 }
5191 static struct bfd_elf_special_section const *
5192 elf64_alpha_special_sections[27] =
5212 alpha_special_sections_s, /* 's' */
5223 /* ECOFF swapping routines. These are used when dealing with the
5224 .mdebug section, which is in the ECOFF debugging format. Copied
5225 from elf32-mips.c. */
5226 static const struct ecoff_debug_swap
5227 elf64_alpha_ecoff_debug_swap =
5229 /* Symbol table magic number. */
5231 /* Alignment of debugging information. E.g., 4. */
5233 /* Sizes of external symbolic information. */
5234 sizeof (struct hdr_ext),
5235 sizeof (struct dnr_ext),
5236 sizeof (struct pdr_ext),
5237 sizeof (struct sym_ext),
5238 sizeof (struct opt_ext),
5239 sizeof (struct fdr_ext),
5240 sizeof (struct rfd_ext),
5241 sizeof (struct ext_ext),
5242 /* Functions to swap in external symbolic data. */
5251 _bfd_ecoff_swap_tir_in,
5252 _bfd_ecoff_swap_rndx_in,
5253 /* Functions to swap out external symbolic data. */
5262 _bfd_ecoff_swap_tir_out,
5263 _bfd_ecoff_swap_rndx_out,
5264 /* Function to read in symbolic data. */
5265 elf64_alpha_read_ecoff_info
5268 /* Use a non-standard hash bucket size of 8. */
5270 static const struct elf_size_info alpha_elf_size_info =
5272 sizeof (Elf64_External_Ehdr),
5273 sizeof (Elf64_External_Phdr),
5274 sizeof (Elf64_External_Shdr),
5275 sizeof (Elf64_External_Rel),
5276 sizeof (Elf64_External_Rela),
5277 sizeof (Elf64_External_Sym),
5278 sizeof (Elf64_External_Dyn),
5279 sizeof (Elf_External_Note),
5283 ELFCLASS64, EV_CURRENT,
5284 bfd_elf64_write_out_phdrs,
5285 bfd_elf64_write_shdrs_and_ehdr,
5286 bfd_elf64_write_relocs,
5287 bfd_elf64_swap_symbol_in,
5288 bfd_elf64_swap_symbol_out,
5289 bfd_elf64_slurp_reloc_table,
5290 bfd_elf64_slurp_symbol_table,
5291 bfd_elf64_swap_dyn_in,
5292 bfd_elf64_swap_dyn_out,
5293 bfd_elf64_swap_reloc_in,
5294 bfd_elf64_swap_reloc_out,
5295 bfd_elf64_swap_reloca_in,
5296 bfd_elf64_swap_reloca_out
5299 #define TARGET_LITTLE_SYM bfd_elf64_alpha_vec
5300 #define TARGET_LITTLE_NAME "elf64-alpha"
5301 #define ELF_ARCH bfd_arch_alpha
5302 #define ELF_MACHINE_CODE EM_ALPHA
5303 #define ELF_MAXPAGESIZE 0x10000
5305 #define bfd_elf64_bfd_link_hash_table_create \
5306 elf64_alpha_bfd_link_hash_table_create
5308 #define bfd_elf64_bfd_reloc_type_lookup \
5309 elf64_alpha_bfd_reloc_type_lookup
5310 #define elf_info_to_howto \
5311 elf64_alpha_info_to_howto
5313 #define bfd_elf64_mkobject \
5314 elf64_alpha_mkobject
5315 #define elf_backend_object_p \
5316 elf64_alpha_object_p
5318 #define elf_backend_section_from_shdr \
5319 elf64_alpha_section_from_shdr
5320 #define elf_backend_section_flags \
5321 elf64_alpha_section_flags
5322 #define elf_backend_fake_sections \
5323 elf64_alpha_fake_sections
5325 #define bfd_elf64_bfd_is_local_label_name \
5326 elf64_alpha_is_local_label_name
5327 #define bfd_elf64_find_nearest_line \
5328 elf64_alpha_find_nearest_line
5329 #define bfd_elf64_bfd_relax_section \
5330 elf64_alpha_relax_section
5332 #define elf_backend_add_symbol_hook \
5333 elf64_alpha_add_symbol_hook
5334 #define elf_backend_check_relocs \
5335 elf64_alpha_check_relocs
5336 #define elf_backend_create_dynamic_sections \
5337 elf64_alpha_create_dynamic_sections
5338 #define elf_backend_adjust_dynamic_symbol \
5339 elf64_alpha_adjust_dynamic_symbol
5340 #define elf_backend_always_size_sections \
5341 elf64_alpha_always_size_sections
5342 #define elf_backend_size_dynamic_sections \
5343 elf64_alpha_size_dynamic_sections
5344 #define elf_backend_relocate_section \
5345 elf64_alpha_relocate_section
5346 #define elf_backend_finish_dynamic_symbol \
5347 elf64_alpha_finish_dynamic_symbol
5348 #define elf_backend_finish_dynamic_sections \
5349 elf64_alpha_finish_dynamic_sections
5350 #define bfd_elf64_bfd_final_link \
5351 elf64_alpha_final_link
5352 #define elf_backend_reloc_type_class \
5353 elf64_alpha_reloc_type_class
5355 #define elf_backend_ecoff_debug_swap \
5356 &elf64_alpha_ecoff_debug_swap
5358 #define elf_backend_size_info \
5361 #define elf_backend_special_sections \
5362 elf64_alpha_special_sections
5364 /* A few constants that determine how the .plt section is set up. */
5365 #define elf_backend_want_got_plt 0
5366 #define elf_backend_plt_readonly 0
5367 #define elf_backend_want_plt_sym 1
5368 #define elf_backend_got_header_size 0
5370 #include "elf64-target.h"
5372 /* FreeBSD support. */
5374 #undef TARGET_LITTLE_SYM
5375 #define TARGET_LITTLE_SYM bfd_elf64_alpha_freebsd_vec
5376 #undef TARGET_LITTLE_NAME
5377 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5379 /* The kernel recognizes executables as valid only if they carry a
5380 "FreeBSD" label in the ELF header. So we put this label on all
5381 executables and (for simplicity) also all other object files. */
5384 elf64_alpha_fbsd_post_process_headers (bfd * abfd,
5385 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
5387 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
5389 i_ehdrp = elf_elfheader (abfd);
5391 /* Put an ABI label supported by FreeBSD >= 4.1. */
5392 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
5393 #ifdef OLD_FREEBSD_ABI_LABEL
5394 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5395 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5399 #undef elf_backend_post_process_headers
5400 #define elf_backend_post_process_headers \
5401 elf64_alpha_fbsd_post_process_headers
5404 #define elf64_bed elf64_alpha_fbsd_bed
5406 #include "elf64-target.h"