1 /* Alpha specific support for 64-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
3 2006, 2007, 2008, 2009, 2010, 2011 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 3 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,
21 MA 02110-1301, USA. */
24 /* We need a published ABI spec for this. Until one comes out, don't
25 assume this'll remain unchanged forever. */
32 #include "elf/alpha.h"
36 #define NO_COFF_RELOCS
37 #define NO_COFF_SYMBOLS
38 #define NO_COFF_LINENOS
40 /* Get the ECOFF swapping routines. Needed for the debug information. */
41 #include "coff/internal.h"
43 #include "coff/symconst.h"
44 #include "coff/ecoff.h"
45 #include "coff/alpha.h"
50 #include "ecoffswap.h"
53 /* Instruction data for plt generation and relaxation. */
61 #define INSN_LDA (OP_LDA << 26)
62 #define INSN_LDAH (OP_LDAH << 26)
63 #define INSN_LDQ (OP_LDQ << 26)
64 #define INSN_BR (OP_BR << 26)
66 #define INSN_ADDQ 0x40000400
67 #define INSN_RDUNIQ 0x0000009e
68 #define INSN_SUBQ 0x40000520
69 #define INSN_S4SUBQ 0x40000560
70 #define INSN_UNOP 0x2ffe0000
72 #define INSN_JSR 0x68004000
73 #define INSN_JMP 0x68000000
74 #define INSN_JSR_MASK 0xfc00c000
76 #define INSN_A(I,A) (I | (A << 21))
77 #define INSN_AB(I,A,B) (I | (A << 21) | (B << 16))
78 #define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C)
79 #define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff))
80 #define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff))
84 /* Set by ld emulation. Putting this into the link_info or hash structure
85 is simply working too hard. */
87 bfd_boolean elf64_alpha_use_secureplt = TRUE;
89 bfd_boolean elf64_alpha_use_secureplt = FALSE;
92 #define OLD_PLT_HEADER_SIZE 32
93 #define OLD_PLT_ENTRY_SIZE 12
94 #define NEW_PLT_HEADER_SIZE 36
95 #define NEW_PLT_ENTRY_SIZE 4
97 #define PLT_HEADER_SIZE \
98 (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
99 #define PLT_ENTRY_SIZE \
100 (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
102 #define MAX_GOT_SIZE (64*1024)
104 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
107 /* Used to implement multiple .got subsections. */
108 struct alpha_elf_got_entry
110 struct alpha_elf_got_entry *next;
112 /* Which .got subsection? */
115 /* The addend in effect for this entry. */
118 /* The .got offset for this entry. */
121 /* The .plt offset for this entry. */
124 /* How many references to this entry? */
127 /* The relocation type of this entry. */
128 unsigned char reloc_type;
130 /* How a LITERAL is used. */
133 /* Have we initialized the dynamic relocation for this entry? */
134 unsigned char reloc_done;
136 /* Have we adjusted this entry for SEC_MERGE? */
137 unsigned char reloc_xlated;
140 struct alpha_elf_reloc_entry
142 struct alpha_elf_reloc_entry *next;
144 /* Which .reloc section? */
147 /* What kind of relocation? */
150 /* Is this against read-only section? */
151 unsigned int reltext : 1;
153 /* How many did we find? */
157 struct alpha_elf_link_hash_entry
159 struct elf_link_hash_entry root;
161 /* External symbol information. */
164 /* Cumulative flags for all the .got entries. */
167 /* Contexts in which a literal was referenced. */
168 #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
169 #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
170 #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
171 #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
172 #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
173 #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
174 #define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
175 #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
176 #define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
178 /* Used to implement multiple .got subsections. */
179 struct alpha_elf_got_entry *got_entries;
181 /* Used to count non-got, non-plt relocations for delayed sizing
182 of relocation sections. */
183 struct alpha_elf_reloc_entry *reloc_entries;
186 /* Alpha ELF linker hash table. */
188 struct alpha_elf_link_hash_table
190 struct elf_link_hash_table root;
192 /* The head of a list of .got subsections linked through
193 alpha_elf_tdata(abfd)->got_link_next. */
196 /* The most recent relax pass that we've seen. The GOTs
197 should be regenerated if this doesn't match. */
201 /* Look up an entry in a Alpha ELF linker hash table. */
203 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
204 ((struct alpha_elf_link_hash_entry *) \
205 elf_link_hash_lookup (&(table)->root, (string), (create), \
208 /* Traverse a Alpha ELF linker hash table. */
210 #define alpha_elf_link_hash_traverse(table, func, info) \
211 (elf_link_hash_traverse \
213 (bfd_boolean (*) (struct elf_link_hash_entry *, PTR)) (func), \
216 /* Get the Alpha ELF linker hash table from a link_info structure. */
218 #define alpha_elf_hash_table(p) \
219 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
220 == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL)
222 /* Get the object's symbols as our own entry type. */
224 #define alpha_elf_sym_hashes(abfd) \
225 ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
227 /* Should we do dynamic things to this symbol? This differs from the
228 generic version in that we never need to consider function pointer
229 equality wrt PLT entries -- we don't create a PLT entry if a symbol's
230 address is ever taken. */
232 static inline bfd_boolean
233 alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h,
234 struct bfd_link_info *info)
236 return _bfd_elf_dynamic_symbol_p (h, info, 0);
239 /* Create an entry in a Alpha ELF linker hash table. */
241 static struct bfd_hash_entry *
242 elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry,
243 struct bfd_hash_table *table,
246 struct alpha_elf_link_hash_entry *ret =
247 (struct alpha_elf_link_hash_entry *) entry;
249 /* Allocate the structure if it has not already been allocated by a
251 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
252 ret = ((struct alpha_elf_link_hash_entry *)
253 bfd_hash_allocate (table,
254 sizeof (struct alpha_elf_link_hash_entry)));
255 if (ret == (struct alpha_elf_link_hash_entry *) NULL)
256 return (struct bfd_hash_entry *) ret;
258 /* Call the allocation method of the superclass. */
259 ret = ((struct alpha_elf_link_hash_entry *)
260 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
262 if (ret != (struct alpha_elf_link_hash_entry *) NULL)
264 /* Set local fields. */
265 memset (&ret->esym, 0, sizeof (EXTR));
266 /* We use -2 as a marker to indicate that the information has
267 not been set. -1 means there is no associated ifd. */
270 ret->got_entries = NULL;
271 ret->reloc_entries = NULL;
274 return (struct bfd_hash_entry *) ret;
277 /* Create a Alpha ELF linker hash table. */
279 static struct bfd_link_hash_table *
280 elf64_alpha_bfd_link_hash_table_create (bfd *abfd)
282 struct alpha_elf_link_hash_table *ret;
283 bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table);
285 ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt);
286 if (ret == (struct alpha_elf_link_hash_table *) NULL)
289 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
290 elf64_alpha_link_hash_newfunc,
291 sizeof (struct alpha_elf_link_hash_entry),
298 return &ret->root.root;
301 /* We have some private fields hanging off of the elf_tdata structure. */
303 struct alpha_elf_obj_tdata
305 struct elf_obj_tdata root;
307 /* For every input file, these are the got entries for that object's
309 struct alpha_elf_got_entry ** local_got_entries;
311 /* For every input file, this is the object that owns the got that
312 this input file uses. */
315 /* For every got, this is a linked list through the objects using this got */
316 bfd *in_got_link_next;
318 /* For every got, this is a link to the next got subsegment. */
321 /* For every got, this is the section. */
324 /* For every got, this is it's total number of words. */
327 /* For every got, this is the sum of the number of words required
328 to hold all of the member object's local got. */
332 #define alpha_elf_tdata(abfd) \
333 ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
335 #define is_alpha_elf(bfd) \
336 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
337 && elf_tdata (bfd) != NULL \
338 && elf_object_id (bfd) == ALPHA_ELF_DATA)
341 elf64_alpha_mkobject (bfd *abfd)
343 return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata),
348 elf64_alpha_object_p (bfd *abfd)
350 /* Set the right machine number for an Alpha ELF file. */
351 return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
354 /* A relocation function which doesn't do anything. */
356 static bfd_reloc_status_type
357 elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
358 asymbol *sym ATTRIBUTE_UNUSED,
359 PTR data ATTRIBUTE_UNUSED, asection *sec,
360 bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
363 reloc->address += sec->output_offset;
367 /* A relocation function used for an unsupported reloc. */
369 static bfd_reloc_status_type
370 elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
371 asymbol *sym ATTRIBUTE_UNUSED,
372 PTR data ATTRIBUTE_UNUSED, asection *sec,
373 bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
376 reloc->address += sec->output_offset;
377 return bfd_reloc_notsupported;
380 /* Do the work of the GPDISP relocation. */
382 static bfd_reloc_status_type
383 elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah,
386 bfd_reloc_status_type ret = bfd_reloc_ok;
388 unsigned long i_ldah, i_lda;
390 i_ldah = bfd_get_32 (abfd, p_ldah);
391 i_lda = bfd_get_32 (abfd, p_lda);
393 /* Complain if the instructions are not correct. */
394 if (((i_ldah >> 26) & 0x3f) != 0x09
395 || ((i_lda >> 26) & 0x3f) != 0x08)
396 ret = bfd_reloc_dangerous;
398 /* Extract the user-supplied offset, mirroring the sign extensions
399 that the instructions perform. */
400 addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
401 addend = (addend ^ 0x80008000) - 0x80008000;
405 if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
406 || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
407 ret = bfd_reloc_overflow;
409 /* compensate for the sign extension again. */
410 i_ldah = ((i_ldah & 0xffff0000)
411 | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
412 i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
414 bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
415 bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
420 /* The special function for the GPDISP reloc. */
422 static bfd_reloc_status_type
423 elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry,
424 asymbol *sym ATTRIBUTE_UNUSED, PTR data,
425 asection *input_section, bfd *output_bfd,
428 bfd_reloc_status_type ret;
429 bfd_vma gp, relocation;
430 bfd_vma high_address;
431 bfd_byte *p_ldah, *p_lda;
433 /* Don't do anything if we're not doing a final link. */
436 reloc_entry->address += input_section->output_offset;
440 high_address = bfd_get_section_limit (abfd, input_section);
441 if (reloc_entry->address > high_address
442 || reloc_entry->address + reloc_entry->addend > high_address)
443 return bfd_reloc_outofrange;
445 /* The gp used in the portion of the output object to which this
446 input object belongs is cached on the input bfd. */
447 gp = _bfd_get_gp_value (abfd);
449 relocation = (input_section->output_section->vma
450 + input_section->output_offset
451 + reloc_entry->address);
453 p_ldah = (bfd_byte *) data + reloc_entry->address;
454 p_lda = p_ldah + reloc_entry->addend;
456 ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
458 /* Complain if the instructions are not correct. */
459 if (ret == bfd_reloc_dangerous)
460 *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
465 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
466 from smaller values. Start with zero, widen, *then* decrement. */
467 #define MINUS_ONE (((bfd_vma)0) - 1)
470 #define SKIP_HOWTO(N) \
471 HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
473 static reloc_howto_type elf64_alpha_howto_table[] =
475 HOWTO (R_ALPHA_NONE, /* type */
477 0, /* size (0 = byte, 1 = short, 2 = long) */
479 TRUE, /* pc_relative */
481 complain_overflow_dont, /* complain_on_overflow */
482 elf64_alpha_reloc_nil, /* special_function */
484 FALSE, /* partial_inplace */
487 TRUE), /* pcrel_offset */
489 /* A 32 bit reference to a symbol. */
490 HOWTO (R_ALPHA_REFLONG, /* type */
492 2, /* size (0 = byte, 1 = short, 2 = long) */
494 FALSE, /* pc_relative */
496 complain_overflow_bitfield, /* complain_on_overflow */
497 bfd_elf_generic_reloc, /* special_function */
498 "REFLONG", /* name */
499 FALSE, /* partial_inplace */
500 0xffffffff, /* src_mask */
501 0xffffffff, /* dst_mask */
502 FALSE), /* pcrel_offset */
504 /* A 64 bit reference to a symbol. */
505 HOWTO (R_ALPHA_REFQUAD, /* type */
507 4, /* size (0 = byte, 1 = short, 2 = long) */
509 FALSE, /* pc_relative */
511 complain_overflow_bitfield, /* complain_on_overflow */
512 bfd_elf_generic_reloc, /* special_function */
513 "REFQUAD", /* name */
514 FALSE, /* partial_inplace */
515 MINUS_ONE, /* src_mask */
516 MINUS_ONE, /* dst_mask */
517 FALSE), /* pcrel_offset */
519 /* A 32 bit GP relative offset. This is just like REFLONG except
520 that when the value is used the value of the gp register will be
522 HOWTO (R_ALPHA_GPREL32, /* type */
524 2, /* size (0 = byte, 1 = short, 2 = long) */
526 FALSE, /* pc_relative */
528 complain_overflow_bitfield, /* complain_on_overflow */
529 bfd_elf_generic_reloc, /* special_function */
530 "GPREL32", /* name */
531 FALSE, /* partial_inplace */
532 0xffffffff, /* src_mask */
533 0xffffffff, /* dst_mask */
534 FALSE), /* pcrel_offset */
536 /* Used for an instruction that refers to memory off the GP register. */
537 HOWTO (R_ALPHA_LITERAL, /* type */
539 1, /* size (0 = byte, 1 = short, 2 = long) */
541 FALSE, /* pc_relative */
543 complain_overflow_signed, /* complain_on_overflow */
544 bfd_elf_generic_reloc, /* special_function */
545 "ELF_LITERAL", /* name */
546 FALSE, /* partial_inplace */
547 0xffff, /* src_mask */
548 0xffff, /* dst_mask */
549 FALSE), /* pcrel_offset */
551 /* This reloc only appears immediately following an ELF_LITERAL reloc.
552 It identifies a use of the literal. The symbol index is special:
553 1 means the literal address is in the base register of a memory
554 format instruction; 2 means the literal address is in the byte
555 offset register of a byte-manipulation instruction; 3 means the
556 literal address is in the target register of a jsr instruction.
557 This does not actually do any relocation. */
558 HOWTO (R_ALPHA_LITUSE, /* type */
560 1, /* size (0 = byte, 1 = short, 2 = long) */
562 FALSE, /* pc_relative */
564 complain_overflow_dont, /* complain_on_overflow */
565 elf64_alpha_reloc_nil, /* special_function */
567 FALSE, /* partial_inplace */
570 FALSE), /* pcrel_offset */
572 /* Load the gp register. This is always used for a ldah instruction
573 which loads the upper 16 bits of the gp register. The symbol
574 index of the GPDISP instruction is an offset in bytes to the lda
575 instruction that loads the lower 16 bits. The value to use for
576 the relocation is the difference between the GP value and the
577 current location; the load will always be done against a register
578 holding the current address.
580 NOTE: Unlike ECOFF, partial in-place relocation is not done. If
581 any offset is present in the instructions, it is an offset from
582 the register to the ldah instruction. This lets us avoid any
583 stupid hackery like inventing a gp value to do partial relocation
584 against. Also unlike ECOFF, we do the whole relocation off of
585 the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
586 space consuming bit, that, since all the information was present
587 in the GPDISP_HI16 reloc. */
588 HOWTO (R_ALPHA_GPDISP, /* type */
590 2, /* size (0 = byte, 1 = short, 2 = long) */
592 FALSE, /* pc_relative */
594 complain_overflow_dont, /* complain_on_overflow */
595 elf64_alpha_reloc_gpdisp, /* special_function */
597 FALSE, /* partial_inplace */
598 0xffff, /* src_mask */
599 0xffff, /* dst_mask */
600 TRUE), /* pcrel_offset */
602 /* A 21 bit branch. */
603 HOWTO (R_ALPHA_BRADDR, /* type */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
607 TRUE, /* pc_relative */
609 complain_overflow_signed, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
612 FALSE, /* partial_inplace */
613 0x1fffff, /* src_mask */
614 0x1fffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
617 /* A hint for a jump to a register. */
618 HOWTO (R_ALPHA_HINT, /* type */
620 1, /* size (0 = byte, 1 = short, 2 = long) */
622 TRUE, /* pc_relative */
624 complain_overflow_dont, /* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
627 FALSE, /* partial_inplace */
628 0x3fff, /* src_mask */
629 0x3fff, /* dst_mask */
630 TRUE), /* pcrel_offset */
632 /* 16 bit PC relative offset. */
633 HOWTO (R_ALPHA_SREL16, /* type */
635 1, /* size (0 = byte, 1 = short, 2 = long) */
637 TRUE, /* pc_relative */
639 complain_overflow_signed, /* complain_on_overflow */
640 bfd_elf_generic_reloc, /* special_function */
642 FALSE, /* partial_inplace */
643 0xffff, /* src_mask */
644 0xffff, /* dst_mask */
645 TRUE), /* pcrel_offset */
647 /* 32 bit PC relative offset. */
648 HOWTO (R_ALPHA_SREL32, /* type */
650 2, /* size (0 = byte, 1 = short, 2 = long) */
652 TRUE, /* pc_relative */
654 complain_overflow_signed, /* complain_on_overflow */
655 bfd_elf_generic_reloc, /* special_function */
657 FALSE, /* partial_inplace */
658 0xffffffff, /* src_mask */
659 0xffffffff, /* dst_mask */
660 TRUE), /* pcrel_offset */
662 /* A 64 bit PC relative offset. */
663 HOWTO (R_ALPHA_SREL64, /* type */
665 4, /* size (0 = byte, 1 = short, 2 = long) */
667 TRUE, /* pc_relative */
669 complain_overflow_signed, /* complain_on_overflow */
670 bfd_elf_generic_reloc, /* special_function */
672 FALSE, /* partial_inplace */
673 MINUS_ONE, /* src_mask */
674 MINUS_ONE, /* dst_mask */
675 TRUE), /* pcrel_offset */
677 /* Skip 12 - 16; deprecated ECOFF relocs. */
684 /* The high 16 bits of the displacement from GP to the target. */
685 HOWTO (R_ALPHA_GPRELHIGH,
687 1, /* size (0 = byte, 1 = short, 2 = long) */
689 FALSE, /* pc_relative */
691 complain_overflow_signed, /* complain_on_overflow */
692 bfd_elf_generic_reloc, /* special_function */
693 "GPRELHIGH", /* name */
694 FALSE, /* partial_inplace */
695 0xffff, /* src_mask */
696 0xffff, /* dst_mask */
697 FALSE), /* pcrel_offset */
699 /* The low 16 bits of the displacement from GP to the target. */
700 HOWTO (R_ALPHA_GPRELLOW,
702 1, /* size (0 = byte, 1 = short, 2 = long) */
704 FALSE, /* pc_relative */
706 complain_overflow_dont, /* complain_on_overflow */
707 bfd_elf_generic_reloc, /* special_function */
708 "GPRELLOW", /* name */
709 FALSE, /* partial_inplace */
710 0xffff, /* src_mask */
711 0xffff, /* dst_mask */
712 FALSE), /* pcrel_offset */
714 /* A 16-bit displacement from the GP to the target. */
715 HOWTO (R_ALPHA_GPREL16,
717 1, /* size (0 = byte, 1 = short, 2 = long) */
719 FALSE, /* pc_relative */
721 complain_overflow_signed, /* complain_on_overflow */
722 bfd_elf_generic_reloc, /* special_function */
723 "GPREL16", /* name */
724 FALSE, /* partial_inplace */
725 0xffff, /* src_mask */
726 0xffff, /* dst_mask */
727 FALSE), /* pcrel_offset */
729 /* Skip 20 - 23; deprecated ECOFF relocs. */
735 /* Misc ELF relocations. */
737 /* A dynamic relocation to copy the target into our .dynbss section. */
738 /* Not generated, as all Alpha objects use PIC, so it is not needed. It
739 is present because every other ELF has one, but should not be used
740 because .dynbss is an ugly thing. */
747 complain_overflow_dont,
748 bfd_elf_generic_reloc,
755 /* A dynamic relocation for a .got entry. */
756 HOWTO (R_ALPHA_GLOB_DAT,
762 complain_overflow_dont,
763 bfd_elf_generic_reloc,
770 /* A dynamic relocation for a .plt entry. */
771 HOWTO (R_ALPHA_JMP_SLOT,
777 complain_overflow_dont,
778 bfd_elf_generic_reloc,
785 /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
786 HOWTO (R_ALPHA_RELATIVE,
792 complain_overflow_dont,
793 bfd_elf_generic_reloc,
800 /* A 21 bit branch that adjusts for gp loads. */
801 HOWTO (R_ALPHA_BRSGP, /* type */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
805 TRUE, /* pc_relative */
807 complain_overflow_signed, /* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
810 FALSE, /* partial_inplace */
811 0x1fffff, /* src_mask */
812 0x1fffff, /* dst_mask */
813 TRUE), /* pcrel_offset */
815 /* Creates a tls_index for the symbol in the got. */
816 HOWTO (R_ALPHA_TLSGD, /* type */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
820 FALSE, /* pc_relative */
822 complain_overflow_signed, /* complain_on_overflow */
823 bfd_elf_generic_reloc, /* special_function */
825 FALSE, /* partial_inplace */
826 0xffff, /* src_mask */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
830 /* Creates a tls_index for the (current) module in the got. */
831 HOWTO (R_ALPHA_TLSLDM, /* type */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
835 FALSE, /* pc_relative */
837 complain_overflow_signed, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
840 FALSE, /* partial_inplace */
841 0xffff, /* src_mask */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
845 /* A dynamic relocation for a DTP module entry. */
846 HOWTO (R_ALPHA_DTPMOD64, /* type */
848 4, /* size (0 = byte, 1 = short, 2 = long) */
850 FALSE, /* pc_relative */
852 complain_overflow_bitfield, /* complain_on_overflow */
853 bfd_elf_generic_reloc, /* special_function */
854 "DTPMOD64", /* name */
855 FALSE, /* partial_inplace */
856 MINUS_ONE, /* src_mask */
857 MINUS_ONE, /* dst_mask */
858 FALSE), /* pcrel_offset */
860 /* Creates a 64-bit offset in the got for the displacement
861 from DTP to the target. */
862 HOWTO (R_ALPHA_GOTDTPREL, /* type */
864 1, /* size (0 = byte, 1 = short, 2 = long) */
866 FALSE, /* pc_relative */
868 complain_overflow_signed, /* complain_on_overflow */
869 bfd_elf_generic_reloc, /* special_function */
870 "GOTDTPREL", /* name */
871 FALSE, /* partial_inplace */
872 0xffff, /* src_mask */
873 0xffff, /* dst_mask */
874 FALSE), /* pcrel_offset */
876 /* A dynamic relocation for a displacement from DTP to the target. */
877 HOWTO (R_ALPHA_DTPREL64, /* type */
879 4, /* size (0 = byte, 1 = short, 2 = long) */
881 FALSE, /* pc_relative */
883 complain_overflow_bitfield, /* complain_on_overflow */
884 bfd_elf_generic_reloc, /* special_function */
885 "DTPREL64", /* name */
886 FALSE, /* partial_inplace */
887 MINUS_ONE, /* src_mask */
888 MINUS_ONE, /* dst_mask */
889 FALSE), /* pcrel_offset */
891 /* The high 16 bits of the displacement from DTP to the target. */
892 HOWTO (R_ALPHA_DTPRELHI, /* type */
894 1, /* size (0 = byte, 1 = short, 2 = long) */
896 FALSE, /* pc_relative */
898 complain_overflow_signed, /* complain_on_overflow */
899 bfd_elf_generic_reloc, /* special_function */
900 "DTPRELHI", /* name */
901 FALSE, /* partial_inplace */
902 0xffff, /* src_mask */
903 0xffff, /* dst_mask */
904 FALSE), /* pcrel_offset */
906 /* The low 16 bits of the displacement from DTP to the target. */
907 HOWTO (R_ALPHA_DTPRELLO, /* type */
909 1, /* size (0 = byte, 1 = short, 2 = long) */
911 FALSE, /* pc_relative */
913 complain_overflow_dont, /* complain_on_overflow */
914 bfd_elf_generic_reloc, /* special_function */
915 "DTPRELLO", /* name */
916 FALSE, /* partial_inplace */
917 0xffff, /* src_mask */
918 0xffff, /* dst_mask */
919 FALSE), /* pcrel_offset */
921 /* A 16-bit displacement from DTP to the target. */
922 HOWTO (R_ALPHA_DTPREL16, /* type */
924 1, /* size (0 = byte, 1 = short, 2 = long) */
926 FALSE, /* pc_relative */
928 complain_overflow_signed, /* complain_on_overflow */
929 bfd_elf_generic_reloc, /* special_function */
930 "DTPREL16", /* name */
931 FALSE, /* partial_inplace */
932 0xffff, /* src_mask */
933 0xffff, /* dst_mask */
934 FALSE), /* pcrel_offset */
936 /* Creates a 64-bit offset in the got for the displacement
937 from TP to the target. */
938 HOWTO (R_ALPHA_GOTTPREL, /* type */
940 1, /* size (0 = byte, 1 = short, 2 = long) */
942 FALSE, /* pc_relative */
944 complain_overflow_signed, /* complain_on_overflow */
945 bfd_elf_generic_reloc, /* special_function */
946 "GOTTPREL", /* name */
947 FALSE, /* partial_inplace */
948 0xffff, /* src_mask */
949 0xffff, /* dst_mask */
950 FALSE), /* pcrel_offset */
952 /* A dynamic relocation for a displacement from TP to the target. */
953 HOWTO (R_ALPHA_TPREL64, /* type */
955 4, /* size (0 = byte, 1 = short, 2 = long) */
957 FALSE, /* pc_relative */
959 complain_overflow_bitfield, /* complain_on_overflow */
960 bfd_elf_generic_reloc, /* special_function */
961 "TPREL64", /* name */
962 FALSE, /* partial_inplace */
963 MINUS_ONE, /* src_mask */
964 MINUS_ONE, /* dst_mask */
965 FALSE), /* pcrel_offset */
967 /* The high 16 bits of the displacement from TP to the target. */
968 HOWTO (R_ALPHA_TPRELHI, /* type */
970 1, /* size (0 = byte, 1 = short, 2 = long) */
972 FALSE, /* pc_relative */
974 complain_overflow_signed, /* complain_on_overflow */
975 bfd_elf_generic_reloc, /* special_function */
976 "TPRELHI", /* name */
977 FALSE, /* partial_inplace */
978 0xffff, /* src_mask */
979 0xffff, /* dst_mask */
980 FALSE), /* pcrel_offset */
982 /* The low 16 bits of the displacement from TP to the target. */
983 HOWTO (R_ALPHA_TPRELLO, /* type */
985 1, /* size (0 = byte, 1 = short, 2 = long) */
987 FALSE, /* pc_relative */
989 complain_overflow_dont, /* complain_on_overflow */
990 bfd_elf_generic_reloc, /* special_function */
991 "TPRELLO", /* name */
992 FALSE, /* partial_inplace */
993 0xffff, /* src_mask */
994 0xffff, /* dst_mask */
995 FALSE), /* pcrel_offset */
997 /* A 16-bit displacement from TP to the target. */
998 HOWTO (R_ALPHA_TPREL16, /* type */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1002 FALSE, /* pc_relative */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 bfd_elf_generic_reloc, /* special_function */
1006 "TPREL16", /* name */
1007 FALSE, /* partial_inplace */
1008 0xffff, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1013 /* A mapping from BFD reloc types to Alpha ELF reloc types. */
1015 struct elf_reloc_map
1017 bfd_reloc_code_real_type bfd_reloc_val;
1021 static const struct elf_reloc_map elf64_alpha_reloc_map[] =
1023 {BFD_RELOC_NONE, R_ALPHA_NONE},
1024 {BFD_RELOC_32, R_ALPHA_REFLONG},
1025 {BFD_RELOC_64, R_ALPHA_REFQUAD},
1026 {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
1027 {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
1028 {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
1029 {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
1030 {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
1031 {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
1032 {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
1033 {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
1034 {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
1035 {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
1036 {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
1037 {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
1038 {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
1039 {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
1040 {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
1041 {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
1042 {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
1043 {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
1044 {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
1045 {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
1046 {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
1047 {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
1048 {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
1049 {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
1050 {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
1051 {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
1052 {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
1055 /* Given a BFD reloc type, return a HOWTO structure. */
1057 static reloc_howto_type *
1058 elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1059 bfd_reloc_code_real_type code)
1061 const struct elf_reloc_map *i, *e;
1062 i = e = elf64_alpha_reloc_map;
1063 e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
1066 if (i->bfd_reloc_val == code)
1067 return &elf64_alpha_howto_table[i->elf_reloc_val];
1072 static reloc_howto_type *
1073 elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1079 i < (sizeof (elf64_alpha_howto_table)
1080 / sizeof (elf64_alpha_howto_table[0]));
1082 if (elf64_alpha_howto_table[i].name != NULL
1083 && strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0)
1084 return &elf64_alpha_howto_table[i];
1089 /* Given an Alpha ELF reloc type, fill in an arelent structure. */
1092 elf64_alpha_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
1093 Elf_Internal_Rela *dst)
1095 unsigned r_type = ELF64_R_TYPE(dst->r_info);
1096 BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
1097 cache_ptr->howto = &elf64_alpha_howto_table[r_type];
1100 /* These two relocations create a two-word entry in the got. */
1101 #define alpha_got_entry_size(r_type) \
1102 (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
1104 /* This is PT_TLS segment p_vaddr. */
1105 #define alpha_get_dtprel_base(info) \
1106 (elf_hash_table (info)->tls_sec->vma)
1108 /* Main program TLS (whose template starts at PT_TLS p_vaddr)
1109 is assigned offset round(16, PT_TLS p_align). */
1110 #define alpha_get_tprel_base(info) \
1111 (elf_hash_table (info)->tls_sec->vma \
1112 - align_power ((bfd_vma) 16, \
1113 elf_hash_table (info)->tls_sec->alignment_power))
1115 /* Handle an Alpha specific section when reading an object file. This
1116 is called when bfd_section_from_shdr finds a section with an unknown
1118 FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
1122 elf64_alpha_section_from_shdr (bfd *abfd,
1123 Elf_Internal_Shdr *hdr,
1129 /* There ought to be a place to keep ELF backend specific flags, but
1130 at the moment there isn't one. We just keep track of the
1131 sections by their name, instead. Fortunately, the ABI gives
1132 suggested names for all the MIPS specific sections, so we will
1133 probably get away with this. */
1134 switch (hdr->sh_type)
1136 case SHT_ALPHA_DEBUG:
1137 if (strcmp (name, ".mdebug") != 0)
1144 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1146 newsect = hdr->bfd_section;
1148 if (hdr->sh_type == SHT_ALPHA_DEBUG)
1150 if (! bfd_set_section_flags (abfd, newsect,
1151 (bfd_get_section_flags (abfd, newsect)
1159 /* Convert Alpha specific section flags to bfd internal section flags. */
1162 elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
1164 if (hdr->sh_flags & SHF_ALPHA_GPREL)
1165 *flags |= SEC_SMALL_DATA;
1170 /* Set the correct type for an Alpha ELF section. We do this by the
1171 section name, which is a hack, but ought to work. */
1174 elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
1176 register const char *name;
1178 name = bfd_get_section_name (abfd, sec);
1180 if (strcmp (name, ".mdebug") == 0)
1182 hdr->sh_type = SHT_ALPHA_DEBUG;
1183 /* In a shared object on Irix 5.3, the .mdebug section has an
1184 entsize of 0. FIXME: Does this matter? */
1185 if ((abfd->flags & DYNAMIC) != 0 )
1186 hdr->sh_entsize = 0;
1188 hdr->sh_entsize = 1;
1190 else if ((sec->flags & SEC_SMALL_DATA)
1191 || strcmp (name, ".sdata") == 0
1192 || strcmp (name, ".sbss") == 0
1193 || strcmp (name, ".lit4") == 0
1194 || strcmp (name, ".lit8") == 0)
1195 hdr->sh_flags |= SHF_ALPHA_GPREL;
1200 /* Hook called by the linker routine which adds symbols from an object
1201 file. We use it to put .comm items in .sbss, and not .bss. */
1204 elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
1205 Elf_Internal_Sym *sym,
1206 const char **namep ATTRIBUTE_UNUSED,
1207 flagword *flagsp ATTRIBUTE_UNUSED,
1208 asection **secp, bfd_vma *valp)
1210 if (sym->st_shndx == SHN_COMMON
1211 && !info->relocatable
1212 && sym->st_size <= elf_gp_size (abfd))
1214 /* Common symbols less than or equal to -G nn bytes are
1215 automatically put into .sbss. */
1217 asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
1221 scomm = bfd_make_section_with_flags (abfd, ".scommon",
1224 | SEC_LINKER_CREATED));
1230 *valp = sym->st_size;
1236 /* Create the .got section. */
1239 elf64_alpha_create_got_section (bfd *abfd,
1240 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1245 if (! is_alpha_elf (abfd))
1248 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1249 | SEC_LINKER_CREATED);
1250 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
1252 || !bfd_set_section_alignment (abfd, s, 3))
1255 alpha_elf_tdata (abfd)->got = s;
1257 /* Make sure the object's gotobj is set to itself so that we default
1258 to every object with its own .got. We'll merge .gots later once
1259 we've collected each object's info. */
1260 alpha_elf_tdata (abfd)->gotobj = abfd;
1265 /* Create all the dynamic sections. */
1268 elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
1272 struct elf_link_hash_entry *h;
1274 if (! is_alpha_elf (abfd))
1277 /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
1279 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1280 | SEC_LINKER_CREATED
1281 | (elf64_alpha_use_secureplt ? SEC_READONLY : 0));
1282 s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags);
1283 if (s == NULL || ! bfd_set_section_alignment (abfd, s, 4))
1286 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
1288 h = _bfd_elf_define_linkage_sym (abfd, info, s,
1289 "_PROCEDURE_LINKAGE_TABLE_");
1290 elf_hash_table (info)->hplt = h;
1294 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1295 | SEC_LINKER_CREATED | SEC_READONLY);
1296 s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags);
1297 if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3))
1300 if (elf64_alpha_use_secureplt)
1302 flags = SEC_ALLOC | SEC_LINKER_CREATED;
1303 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
1304 if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3))
1308 /* We may or may not have created a .got section for this object, but
1309 we definitely havn't done the rest of the work. */
1311 if (alpha_elf_tdata(abfd)->gotobj == NULL)
1313 if (!elf64_alpha_create_got_section (abfd, info))
1317 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1318 | SEC_LINKER_CREATED | SEC_READONLY);
1319 s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags);
1321 || !bfd_set_section_alignment (abfd, s, 3))
1324 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
1325 dynobj's .got section. We don't do this in the linker script
1326 because we don't want to define the symbol if we are not creating
1327 a global offset table. */
1328 h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got,
1329 "_GLOBAL_OFFSET_TABLE_");
1330 elf_hash_table (info)->hgot = h;
1337 /* Read ECOFF debugging information from a .mdebug section into a
1338 ecoff_debug_info structure. */
1341 elf64_alpha_read_ecoff_info (bfd *abfd, asection *section,
1342 struct ecoff_debug_info *debug)
1345 const struct ecoff_debug_swap *swap;
1346 char *ext_hdr = NULL;
1348 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1349 memset (debug, 0, sizeof (*debug));
1351 ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
1352 if (ext_hdr == NULL && swap->external_hdr_size != 0)
1355 if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
1356 swap->external_hdr_size))
1359 symhdr = &debug->symbolic_header;
1360 (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
1362 /* The symbolic header contains absolute file offsets and sizes to
1364 #define READ(ptr, offset, count, size, type) \
1365 if (symhdr->count == 0) \
1366 debug->ptr = NULL; \
1369 bfd_size_type amt = (bfd_size_type) size * symhdr->count; \
1370 debug->ptr = (type) bfd_malloc (amt); \
1371 if (debug->ptr == NULL) \
1372 goto error_return; \
1373 if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
1374 || bfd_bread (debug->ptr, amt, abfd) != amt) \
1375 goto error_return; \
1378 READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
1379 READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
1380 READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
1381 READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
1382 READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
1383 READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
1385 READ (ss, cbSsOffset, issMax, sizeof (char), char *);
1386 READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
1387 READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
1388 READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
1389 READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
1397 if (ext_hdr != NULL)
1399 if (debug->line != NULL)
1401 if (debug->external_dnr != NULL)
1402 free (debug->external_dnr);
1403 if (debug->external_pdr != NULL)
1404 free (debug->external_pdr);
1405 if (debug->external_sym != NULL)
1406 free (debug->external_sym);
1407 if (debug->external_opt != NULL)
1408 free (debug->external_opt);
1409 if (debug->external_aux != NULL)
1410 free (debug->external_aux);
1411 if (debug->ss != NULL)
1413 if (debug->ssext != NULL)
1414 free (debug->ssext);
1415 if (debug->external_fdr != NULL)
1416 free (debug->external_fdr);
1417 if (debug->external_rfd != NULL)
1418 free (debug->external_rfd);
1419 if (debug->external_ext != NULL)
1420 free (debug->external_ext);
1424 /* Alpha ELF local labels start with '$'. */
1427 elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
1429 return name[0] == '$';
1432 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
1433 routine in order to handle the ECOFF debugging information. We
1434 still call this mips_elf_find_line because of the slot
1435 find_line_info in elf_obj_tdata is declared that way. */
1437 struct mips_elf_find_line
1439 struct ecoff_debug_info d;
1440 struct ecoff_find_line i;
1444 elf64_alpha_find_nearest_line (bfd *abfd, asection *section, asymbol **symbols,
1445 bfd_vma offset, const char **filename_ptr,
1446 const char **functionname_ptr,
1447 unsigned int *line_ptr)
1451 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
1452 filename_ptr, functionname_ptr,
1454 &elf_tdata (abfd)->dwarf2_find_line_info))
1457 msec = bfd_get_section_by_name (abfd, ".mdebug");
1461 struct mips_elf_find_line *fi;
1462 const struct ecoff_debug_swap * const swap =
1463 get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
1465 /* If we are called during a link, alpha_elf_final_link may have
1466 cleared the SEC_HAS_CONTENTS field. We force it back on here
1467 if appropriate (which it normally will be). */
1468 origflags = msec->flags;
1469 if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
1470 msec->flags |= SEC_HAS_CONTENTS;
1472 fi = elf_tdata (abfd)->find_line_info;
1475 bfd_size_type external_fdr_size;
1478 struct fdr *fdr_ptr;
1479 bfd_size_type amt = sizeof (struct mips_elf_find_line);
1481 fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
1484 msec->flags = origflags;
1488 if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
1490 msec->flags = origflags;
1494 /* Swap in the FDR information. */
1495 amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
1496 fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
1497 if (fi->d.fdr == NULL)
1499 msec->flags = origflags;
1502 external_fdr_size = swap->external_fdr_size;
1503 fdr_ptr = fi->d.fdr;
1504 fraw_src = (char *) fi->d.external_fdr;
1505 fraw_end = (fraw_src
1506 + fi->d.symbolic_header.ifdMax * external_fdr_size);
1507 for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
1508 (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
1510 elf_tdata (abfd)->find_line_info = fi;
1512 /* Note that we don't bother to ever free this information.
1513 find_nearest_line is either called all the time, as in
1514 objdump -l, so the information should be saved, or it is
1515 rarely called, as in ld error messages, so the memory
1516 wasted is unimportant. Still, it would probably be a
1517 good idea for free_cached_info to throw it away. */
1520 if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
1521 &fi->i, filename_ptr, functionname_ptr,
1524 msec->flags = origflags;
1528 msec->flags = origflags;
1531 /* Fall back on the generic ELF find_nearest_line routine. */
1533 return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
1534 filename_ptr, functionname_ptr,
1538 /* Structure used to pass information to alpha_elf_output_extsym. */
1543 struct bfd_link_info *info;
1544 struct ecoff_debug_info *debug;
1545 const struct ecoff_debug_swap *swap;
1550 elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, PTR data)
1552 struct extsym_info *einfo = (struct extsym_info *) data;
1554 asection *sec, *output_section;
1556 if (h->root.indx == -2)
1558 else if ((h->root.def_dynamic
1559 || h->root.ref_dynamic
1560 || h->root.root.type == bfd_link_hash_new)
1561 && !h->root.def_regular
1562 && !h->root.ref_regular)
1564 else if (einfo->info->strip == strip_all
1565 || (einfo->info->strip == strip_some
1566 && bfd_hash_lookup (einfo->info->keep_hash,
1567 h->root.root.root.string,
1568 FALSE, FALSE) == NULL))
1576 if (h->esym.ifd == -2)
1579 h->esym.cobol_main = 0;
1580 h->esym.weakext = 0;
1581 h->esym.reserved = 0;
1582 h->esym.ifd = ifdNil;
1583 h->esym.asym.value = 0;
1584 h->esym.asym.st = stGlobal;
1586 if (h->root.root.type != bfd_link_hash_defined
1587 && h->root.root.type != bfd_link_hash_defweak)
1588 h->esym.asym.sc = scAbs;
1593 sec = h->root.root.u.def.section;
1594 output_section = sec->output_section;
1596 /* When making a shared library and symbol h is the one from
1597 the another shared library, OUTPUT_SECTION may be null. */
1598 if (output_section == NULL)
1599 h->esym.asym.sc = scUndefined;
1602 name = bfd_section_name (output_section->owner, output_section);
1604 if (strcmp (name, ".text") == 0)
1605 h->esym.asym.sc = scText;
1606 else if (strcmp (name, ".data") == 0)
1607 h->esym.asym.sc = scData;
1608 else if (strcmp (name, ".sdata") == 0)
1609 h->esym.asym.sc = scSData;
1610 else if (strcmp (name, ".rodata") == 0
1611 || strcmp (name, ".rdata") == 0)
1612 h->esym.asym.sc = scRData;
1613 else if (strcmp (name, ".bss") == 0)
1614 h->esym.asym.sc = scBss;
1615 else if (strcmp (name, ".sbss") == 0)
1616 h->esym.asym.sc = scSBss;
1617 else if (strcmp (name, ".init") == 0)
1618 h->esym.asym.sc = scInit;
1619 else if (strcmp (name, ".fini") == 0)
1620 h->esym.asym.sc = scFini;
1622 h->esym.asym.sc = scAbs;
1626 h->esym.asym.reserved = 0;
1627 h->esym.asym.index = indexNil;
1630 if (h->root.root.type == bfd_link_hash_common)
1631 h->esym.asym.value = h->root.root.u.c.size;
1632 else if (h->root.root.type == bfd_link_hash_defined
1633 || h->root.root.type == bfd_link_hash_defweak)
1635 if (h->esym.asym.sc == scCommon)
1636 h->esym.asym.sc = scBss;
1637 else if (h->esym.asym.sc == scSCommon)
1638 h->esym.asym.sc = scSBss;
1640 sec = h->root.root.u.def.section;
1641 output_section = sec->output_section;
1642 if (output_section != NULL)
1643 h->esym.asym.value = (h->root.root.u.def.value
1644 + sec->output_offset
1645 + output_section->vma);
1647 h->esym.asym.value = 0;
1650 if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
1651 h->root.root.root.string,
1654 einfo->failed = TRUE;
1661 /* Search for and possibly create a got entry. */
1663 static struct alpha_elf_got_entry *
1664 get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h,
1665 unsigned long r_type, unsigned long r_symndx,
1668 struct alpha_elf_got_entry *gotent;
1669 struct alpha_elf_got_entry **slot;
1672 slot = &h->got_entries;
1675 /* This is a local .got entry -- record for merge. */
1677 struct alpha_elf_got_entry **local_got_entries;
1679 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
1680 if (!local_got_entries)
1683 Elf_Internal_Shdr *symtab_hdr;
1685 symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
1686 size = symtab_hdr->sh_info;
1687 size *= sizeof (struct alpha_elf_got_entry *);
1690 = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
1691 if (!local_got_entries)
1694 alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
1697 slot = &local_got_entries[r_symndx];
1700 for (gotent = *slot; gotent ; gotent = gotent->next)
1701 if (gotent->gotobj == abfd
1702 && gotent->reloc_type == r_type
1703 && gotent->addend == r_addend)
1711 amt = sizeof (struct alpha_elf_got_entry);
1712 gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
1716 gotent->gotobj = abfd;
1717 gotent->addend = r_addend;
1718 gotent->got_offset = -1;
1719 gotent->plt_offset = -1;
1720 gotent->use_count = 1;
1721 gotent->reloc_type = r_type;
1722 gotent->reloc_done = 0;
1723 gotent->reloc_xlated = 0;
1725 gotent->next = *slot;
1728 entry_size = alpha_got_entry_size (r_type);
1729 alpha_elf_tdata (abfd)->total_got_size += entry_size;
1731 alpha_elf_tdata(abfd)->local_got_size += entry_size;
1734 gotent->use_count += 1;
1740 elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah)
1742 return ((ah->root.type == STT_FUNC
1743 || ah->root.root.type == bfd_link_hash_undefweak
1744 || ah->root.root.type == bfd_link_hash_undefined)
1745 && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0
1746 && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0);
1749 /* Handle dynamic relocations when doing an Alpha ELF link. */
1752 elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info,
1753 asection *sec, const Elf_Internal_Rela *relocs)
1757 Elf_Internal_Shdr *symtab_hdr;
1758 struct alpha_elf_link_hash_entry **sym_hashes;
1759 const Elf_Internal_Rela *rel, *relend;
1762 if (info->relocatable)
1765 /* Don't do anything special with non-loaded, non-alloced sections.
1766 In particular, any relocs in such sections should not affect GOT
1767 and PLT reference counting (ie. we don't allow them to create GOT
1768 or PLT entries), there's no possibility or desire to optimize TLS
1769 relocs, and there's not much point in propagating relocs to shared
1770 libs that the dynamic linker won't relocate. */
1771 if ((sec->flags & SEC_ALLOC) == 0)
1774 BFD_ASSERT (is_alpha_elf (abfd));
1776 dynobj = elf_hash_table (info)->dynobj;
1778 elf_hash_table (info)->dynobj = dynobj = abfd;
1781 symtab_hdr = &elf_symtab_hdr (abfd);
1782 sym_hashes = alpha_elf_sym_hashes (abfd);
1784 relend = relocs + sec->reloc_count;
1785 for (rel = relocs; rel < relend; ++rel)
1793 unsigned long r_symndx, r_type;
1794 struct alpha_elf_link_hash_entry *h;
1795 unsigned int gotent_flags;
1796 bfd_boolean maybe_dynamic;
1800 r_symndx = ELF64_R_SYM (rel->r_info);
1801 if (r_symndx < symtab_hdr->sh_info)
1805 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1807 while (h->root.root.type == bfd_link_hash_indirect
1808 || h->root.root.type == bfd_link_hash_warning)
1809 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
1811 h->root.ref_regular = 1;
1814 /* We can only get preliminary data on whether a symbol is
1815 locally or externally defined, as not all of the input files
1816 have yet been processed. Do something with what we know, as
1817 this may help reduce memory usage and processing time later. */
1818 maybe_dynamic = FALSE;
1819 if (h && ((info->shared
1821 || info->unresolved_syms_in_shared_libs == RM_IGNORE))
1822 || !h->root.def_regular
1823 || h->root.root.type == bfd_link_hash_defweak))
1824 maybe_dynamic = TRUE;
1828 r_type = ELF64_R_TYPE (rel->r_info);
1829 addend = rel->r_addend;
1833 case R_ALPHA_LITERAL:
1834 need = NEED_GOT | NEED_GOT_ENTRY;
1836 /* Remember how this literal is used from its LITUSEs.
1837 This will be important when it comes to decide if we can
1838 create a .plt entry for a function symbol. */
1839 while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
1840 if (rel->r_addend >= 1 && rel->r_addend <= 6)
1841 gotent_flags |= 1 << rel->r_addend;
1844 /* No LITUSEs -- presumably the address is used somehow. */
1845 if (gotent_flags == 0)
1846 gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
1849 case R_ALPHA_GPDISP:
1850 case R_ALPHA_GPREL16:
1851 case R_ALPHA_GPREL32:
1852 case R_ALPHA_GPRELHIGH:
1853 case R_ALPHA_GPRELLOW:
1858 case R_ALPHA_REFLONG:
1859 case R_ALPHA_REFQUAD:
1860 if (info->shared || maybe_dynamic)
1864 case R_ALPHA_TLSLDM:
1865 /* The symbol for a TLSLDM reloc is ignored. Collapse the
1866 reloc to the STN_UNDEF (0) symbol so that they all match. */
1867 r_symndx = STN_UNDEF;
1869 maybe_dynamic = FALSE;
1873 case R_ALPHA_GOTDTPREL:
1874 need = NEED_GOT | NEED_GOT_ENTRY;
1877 case R_ALPHA_GOTTPREL:
1878 need = NEED_GOT | NEED_GOT_ENTRY;
1879 gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
1881 info->flags |= DF_STATIC_TLS;
1884 case R_ALPHA_TPREL64:
1885 if (info->shared || maybe_dynamic)
1888 info->flags |= DF_STATIC_TLS;
1892 if (need & NEED_GOT)
1894 if (alpha_elf_tdata(abfd)->gotobj == NULL)
1896 if (!elf64_alpha_create_got_section (abfd, info))
1901 if (need & NEED_GOT_ENTRY)
1903 struct alpha_elf_got_entry *gotent;
1905 gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
1911 gotent->flags |= gotent_flags;
1914 gotent_flags |= h->flags;
1915 h->flags = gotent_flags;
1917 /* Make a guess as to whether a .plt entry is needed. */
1918 /* ??? It appears that we won't make it into
1919 adjust_dynamic_symbol for symbols that remain
1920 totally undefined. Copying this check here means
1921 we can create a plt entry for them too. */
1923 = (maybe_dynamic && elf64_alpha_want_plt (h));
1928 if (need & NEED_DYNREL)
1930 /* We need to create the section here now whether we eventually
1931 use it or not so that it gets mapped to an output section by
1932 the linker. If not used, we'll kill it in size_dynamic_sections. */
1935 sreloc = _bfd_elf_make_dynamic_reloc_section
1936 (sec, dynobj, 3, abfd, /*rela?*/ TRUE);
1944 /* Since we havn't seen all of the input symbols yet, we
1945 don't know whether we'll actually need a dynamic relocation
1946 entry for this reloc. So make a record of it. Once we
1947 find out if this thing needs dynamic relocation we'll
1948 expand the relocation sections by the appropriate amount. */
1950 struct alpha_elf_reloc_entry *rent;
1952 for (rent = h->reloc_entries; rent; rent = rent->next)
1953 if (rent->rtype == r_type && rent->srel == sreloc)
1958 amt = sizeof (struct alpha_elf_reloc_entry);
1959 rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
1963 rent->srel = sreloc;
1964 rent->rtype = r_type;
1966 rent->reltext = (sec->flags & SEC_READONLY) != 0;
1968 rent->next = h->reloc_entries;
1969 h->reloc_entries = rent;
1974 else if (info->shared)
1976 /* If this is a shared library, and the section is to be
1977 loaded into memory, we need a RELATIVE reloc. */
1978 sreloc->size += sizeof (Elf64_External_Rela);
1979 if (sec->flags & SEC_READONLY)
1980 info->flags |= DF_TEXTREL;
1988 /* Return the section that should be marked against GC for a given
1992 elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info,
1993 Elf_Internal_Rela *rel,
1994 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)
1996 /* These relocations don't really reference a symbol. Instead we store
1997 extra data in their addend slot. Ignore the symbol. */
1998 switch (ELF64_R_TYPE (rel->r_info))
2000 case R_ALPHA_LITUSE:
2001 case R_ALPHA_GPDISP:
2006 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2009 /* Update the got entry reference counts for the section being removed. */
2012 elf64_alpha_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
2013 asection *sec, const Elf_Internal_Rela *relocs)
2015 Elf_Internal_Shdr *symtab_hdr;
2016 struct alpha_elf_link_hash_entry **sym_hashes;
2017 const Elf_Internal_Rela *rel, *relend;
2019 if (info->relocatable)
2022 symtab_hdr = &elf_symtab_hdr (abfd);
2023 sym_hashes = alpha_elf_sym_hashes (abfd);
2025 relend = relocs + sec->reloc_count;
2026 for (rel = relocs; rel < relend; rel++)
2028 unsigned long r_symndx, r_type;
2029 struct alpha_elf_link_hash_entry *h = NULL;
2030 struct alpha_elf_got_entry *gotent;
2032 r_symndx = ELF64_R_SYM (rel->r_info);
2033 if (r_symndx >= symtab_hdr->sh_info)
2035 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2036 while (h->root.root.type == bfd_link_hash_indirect
2037 || h->root.root.type == bfd_link_hash_warning)
2038 h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
2041 r_type = ELF64_R_TYPE (rel->r_info);
2044 case R_ALPHA_LITERAL:
2045 /* ??? Ignore re-computation of gotent_flags. We're not
2046 carrying a use-count for each bit in that mask. */
2049 case R_ALPHA_GOTDTPREL:
2050 case R_ALPHA_GOTTPREL:
2051 /* Fetch the got entry from the tables. */
2052 gotent = get_got_entry (abfd, h, r_type, r_symndx, rel->r_addend);
2054 /* The got entry *must* exist, since we should have created it
2055 before during check_relocs. Also note that get_got_entry
2056 assumed this was going to be another use, and so incremented
2057 the use count again. Thus the use count must be at least the
2058 one real use and the "use" we just added. */
2059 if (gotent == NULL || gotent->use_count < 2)
2064 gotent->use_count -= 2;
2075 /* Adjust a symbol defined by a dynamic object and referenced by a
2076 regular object. The current definition is in some section of the
2077 dynamic object, but we're not including those sections. We have to
2078 change the definition to something the rest of the link can
2082 elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info,
2083 struct elf_link_hash_entry *h)
2087 struct alpha_elf_link_hash_entry *ah;
2089 dynobj = elf_hash_table(info)->dynobj;
2090 ah = (struct alpha_elf_link_hash_entry *)h;
2092 /* Now that we've seen all of the input symbols, finalize our decision
2093 about whether this symbol should get a .plt entry. Irritatingly, it
2094 is common for folk to leave undefined symbols in shared libraries,
2095 and they still expect lazy binding; accept undefined symbols in lieu
2097 if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah))
2099 h->needs_plt = TRUE;
2101 s = bfd_get_section_by_name(dynobj, ".plt");
2102 if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
2105 /* We need one plt entry per got subsection. Delay allocation of
2106 the actual plt entries until size_plt_section, called from
2107 size_dynamic_sections or during relaxation. */
2112 h->needs_plt = FALSE;
2114 /* If this is a weak symbol, and there is a real definition, the
2115 processor independent code will have arranged for us to see the
2116 real definition first, and we can just use the same value. */
2117 if (h->u.weakdef != NULL)
2119 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2120 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2121 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2122 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2126 /* This is a reference to a symbol defined by a dynamic object which
2127 is not a function. The Alpha, since it uses .got entries for all
2128 symbols even in regular objects, does not need the hackery of a
2129 .dynbss section and COPY dynamic relocations. */
2134 /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
2137 elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h,
2138 const Elf_Internal_Sym *isym,
2139 bfd_boolean definition,
2140 bfd_boolean dynamic)
2142 if (!dynamic && definition)
2143 h->other = ((h->other & ELF_ST_VISIBILITY (-1))
2144 | (isym->st_other & ~ELF_ST_VISIBILITY (-1)));
2147 /* Symbol versioning can create new symbols, and make our old symbols
2148 indirect to the new ones. Consolidate the got and reloc information
2149 in these situations. */
2152 elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info,
2153 struct elf_link_hash_entry *dir,
2154 struct elf_link_hash_entry *ind)
2156 struct alpha_elf_link_hash_entry *hi
2157 = (struct alpha_elf_link_hash_entry *) ind;
2158 struct alpha_elf_link_hash_entry *hs
2159 = (struct alpha_elf_link_hash_entry *) dir;
2161 /* Do the merging in the superclass. */
2162 _bfd_elf_link_hash_copy_indirect(info, dir, ind);
2164 /* Merge the flags. Whee. */
2165 hs->flags |= hi->flags;
2167 /* ??? It's unclear to me what's really supposed to happen when
2168 "merging" defweak and defined symbols, given that we don't
2169 actually throw away the defweak. This more-or-less copies
2170 the logic related to got and plt entries in the superclass. */
2171 if (ind->root.type != bfd_link_hash_indirect)
2174 /* Merge the .got entries. Cannibalize the old symbol's list in
2175 doing so, since we don't need it anymore. */
2177 if (hs->got_entries == NULL)
2178 hs->got_entries = hi->got_entries;
2181 struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
2183 gsh = hs->got_entries;
2184 for (gi = hi->got_entries; gi ; gi = gin)
2187 for (gs = gsh; gs ; gs = gs->next)
2188 if (gi->gotobj == gs->gotobj
2189 && gi->reloc_type == gs->reloc_type
2190 && gi->addend == gs->addend)
2192 gi->use_count += gs->use_count;
2195 gi->next = hs->got_entries;
2196 hs->got_entries = gi;
2200 hi->got_entries = NULL;
2202 /* And similar for the reloc entries. */
2204 if (hs->reloc_entries == NULL)
2205 hs->reloc_entries = hi->reloc_entries;
2208 struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
2210 rsh = hs->reloc_entries;
2211 for (ri = hi->reloc_entries; ri ; ri = rin)
2214 for (rs = rsh; rs ; rs = rs->next)
2215 if (ri->rtype == rs->rtype && ri->srel == rs->srel)
2217 rs->count += ri->count;
2220 ri->next = hs->reloc_entries;
2221 hs->reloc_entries = ri;
2225 hi->reloc_entries = NULL;
2228 /* Is it possible to merge two object file's .got tables? */
2231 elf64_alpha_can_merge_gots (bfd *a, bfd *b)
2233 int total = alpha_elf_tdata (a)->total_got_size;
2236 /* Trivial quick fallout test. */
2237 if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
2240 /* By their nature, local .got entries cannot be merged. */
2241 if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
2244 /* Failing the common trivial comparison, we must effectively
2245 perform the merge. Not actually performing the merge means that
2246 we don't have to store undo information in case we fail. */
2247 for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
2249 struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
2250 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
2253 n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
2254 for (i = 0; i < n; ++i)
2256 struct alpha_elf_got_entry *ae, *be;
2257 struct alpha_elf_link_hash_entry *h;
2260 while (h->root.root.type == bfd_link_hash_indirect
2261 || h->root.root.type == bfd_link_hash_warning)
2262 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2264 for (be = h->got_entries; be ; be = be->next)
2266 if (be->use_count == 0)
2268 if (be->gotobj != b)
2271 for (ae = h->got_entries; ae ; ae = ae->next)
2273 && ae->reloc_type == be->reloc_type
2274 && ae->addend == be->addend)
2277 total += alpha_got_entry_size (be->reloc_type);
2278 if (total > MAX_GOT_SIZE)
2288 /* Actually merge two .got tables. */
2291 elf64_alpha_merge_gots (bfd *a, bfd *b)
2293 int total = alpha_elf_tdata (a)->total_got_size;
2296 /* Remember local expansion. */
2298 int e = alpha_elf_tdata (b)->local_got_size;
2300 alpha_elf_tdata (a)->local_got_size += e;
2303 for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
2305 struct alpha_elf_got_entry **local_got_entries;
2306 struct alpha_elf_link_hash_entry **hashes;
2307 Elf_Internal_Shdr *symtab_hdr;
2310 /* Let the local .got entries know they are part of a new subsegment. */
2311 local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
2312 if (local_got_entries)
2314 n = elf_tdata (bsub)->symtab_hdr.sh_info;
2315 for (i = 0; i < n; ++i)
2317 struct alpha_elf_got_entry *ent;
2318 for (ent = local_got_entries[i]; ent; ent = ent->next)
2323 /* Merge the global .got entries. */
2324 hashes = alpha_elf_sym_hashes (bsub);
2325 symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
2327 n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
2328 for (i = 0; i < n; ++i)
2330 struct alpha_elf_got_entry *ae, *be, **pbe, **start;
2331 struct alpha_elf_link_hash_entry *h;
2334 while (h->root.root.type == bfd_link_hash_indirect
2335 || h->root.root.type == bfd_link_hash_warning)
2336 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2338 pbe = start = &h->got_entries;
2339 while ((be = *pbe) != NULL)
2341 if (be->use_count == 0)
2344 memset (be, 0xa5, sizeof (*be));
2347 if (be->gotobj != b)
2350 for (ae = *start; ae ; ae = ae->next)
2352 && ae->reloc_type == be->reloc_type
2353 && ae->addend == be->addend)
2355 ae->flags |= be->flags;
2356 ae->use_count += be->use_count;
2358 memset (be, 0xa5, sizeof (*be));
2362 total += alpha_got_entry_size (be->reloc_type);
2370 alpha_elf_tdata (bsub)->gotobj = a;
2372 alpha_elf_tdata (a)->total_got_size = total;
2374 /* Merge the two in_got chains. */
2379 while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
2382 alpha_elf_tdata (bsub)->in_got_link_next = b;
2386 /* Calculate the offsets for the got entries. */
2389 elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h,
2390 PTR arg ATTRIBUTE_UNUSED)
2392 struct alpha_elf_got_entry *gotent;
2394 for (gotent = h->got_entries; gotent; gotent = gotent->next)
2395 if (gotent->use_count > 0)
2397 struct alpha_elf_obj_tdata *td;
2398 bfd_size_type *plge;
2400 td = alpha_elf_tdata (gotent->gotobj);
2401 plge = &td->got->size;
2402 gotent->got_offset = *plge;
2403 *plge += alpha_got_entry_size (gotent->reloc_type);
2410 elf64_alpha_calc_got_offsets (struct bfd_link_info *info)
2413 struct alpha_elf_link_hash_table * htab;
2415 htab = alpha_elf_hash_table (info);
2418 got_list = htab->got_list;
2420 /* First, zero out the .got sizes, as we may be recalculating the
2421 .got after optimizing it. */
2422 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
2423 alpha_elf_tdata(i)->got->size = 0;
2425 /* Next, fill in the offsets for all the global entries. */
2426 alpha_elf_link_hash_traverse (htab,
2427 elf64_alpha_calc_got_offsets_for_symbol,
2430 /* Finally, fill in the offsets for the local entries. */
2431 for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
2433 bfd_size_type got_offset = alpha_elf_tdata(i)->got->size;
2436 for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
2438 struct alpha_elf_got_entry **local_got_entries, *gotent;
2441 local_got_entries = alpha_elf_tdata(j)->local_got_entries;
2442 if (!local_got_entries)
2445 for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
2446 for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
2447 if (gotent->use_count > 0)
2449 gotent->got_offset = got_offset;
2450 got_offset += alpha_got_entry_size (gotent->reloc_type);
2454 alpha_elf_tdata(i)->got->size = got_offset;
2458 /* Constructs the gots. */
2461 elf64_alpha_size_got_sections (struct bfd_link_info *info)
2463 bfd *i, *got_list, *cur_got_obj = NULL;
2464 struct alpha_elf_link_hash_table * htab;
2466 htab = alpha_elf_hash_table (info);
2469 got_list = htab->got_list;
2471 /* On the first time through, pretend we have an existing got list
2472 consisting of all of the input files. */
2473 if (got_list == NULL)
2475 for (i = info->input_bfds; i ; i = i->link_next)
2479 if (! is_alpha_elf (i))
2482 this_got = alpha_elf_tdata (i)->gotobj;
2483 if (this_got == NULL)
2486 /* We are assuming no merging has yet occurred. */
2487 BFD_ASSERT (this_got == i);
2489 if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
2491 /* Yikes! A single object file has too many entries. */
2492 (*_bfd_error_handler)
2493 (_("%B: .got subsegment exceeds 64K (size %d)"),
2494 i, alpha_elf_tdata (this_got)->total_got_size);
2498 if (got_list == NULL)
2499 got_list = this_got;
2501 alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
2502 cur_got_obj = this_got;
2505 /* Strange degenerate case of no got references. */
2506 if (got_list == NULL)
2509 htab->got_list = got_list;
2512 cur_got_obj = got_list;
2513 if (cur_got_obj == NULL)
2516 i = alpha_elf_tdata(cur_got_obj)->got_link_next;
2519 if (elf64_alpha_can_merge_gots (cur_got_obj, i))
2521 elf64_alpha_merge_gots (cur_got_obj, i);
2523 alpha_elf_tdata(i)->got->size = 0;
2524 i = alpha_elf_tdata(i)->got_link_next;
2525 alpha_elf_tdata(cur_got_obj)->got_link_next = i;
2530 i = alpha_elf_tdata(i)->got_link_next;
2534 /* Once the gots have been merged, fill in the got offsets for
2535 everything therein. */
2536 elf64_alpha_calc_got_offsets (info);
2542 elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, PTR data)
2544 asection *splt = (asection *) data;
2545 struct alpha_elf_got_entry *gotent;
2546 bfd_boolean saw_one = FALSE;
2548 /* If we didn't need an entry before, we still don't. */
2549 if (!h->root.needs_plt)
2552 /* For each LITERAL got entry still in use, allocate a plt entry. */
2553 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
2554 if (gotent->reloc_type == R_ALPHA_LITERAL
2555 && gotent->use_count > 0)
2557 if (splt->size == 0)
2558 splt->size = PLT_HEADER_SIZE;
2559 gotent->plt_offset = splt->size;
2560 splt->size += PLT_ENTRY_SIZE;
2564 /* If there weren't any, there's no longer a need for the PLT entry. */
2566 h->root.needs_plt = FALSE;
2571 /* Called from relax_section to rebuild the PLT in light of potential changes
2572 in the function's status. */
2575 elf64_alpha_size_plt_section (struct bfd_link_info *info)
2577 asection *splt, *spltrel, *sgotplt;
2578 unsigned long entries;
2580 struct alpha_elf_link_hash_table * htab;
2582 htab = alpha_elf_hash_table (info);
2586 dynobj = elf_hash_table(info)->dynobj;
2587 splt = bfd_get_section_by_name (dynobj, ".plt");
2593 alpha_elf_link_hash_traverse (htab,
2594 elf64_alpha_size_plt_section_1, splt);
2596 /* Every plt entry requires a JMP_SLOT relocation. */
2597 spltrel = bfd_get_section_by_name (dynobj, ".rela.plt");
2601 if (elf64_alpha_use_secureplt)
2602 entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE;
2604 entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE;
2606 spltrel->size = entries * sizeof (Elf64_External_Rela);
2608 /* When using the secureplt, we need two words somewhere in the data
2609 segment for the dynamic linker to tell us where to go. This is the
2610 entire contents of the .got.plt section. */
2611 if (elf64_alpha_use_secureplt)
2613 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2614 sgotplt->size = entries ? 16 : 0;
2619 elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2620 struct bfd_link_info *info)
2623 struct alpha_elf_link_hash_table * htab;
2625 if (info->relocatable)
2628 htab = alpha_elf_hash_table (info);
2632 if (!elf64_alpha_size_got_sections (info))
2635 /* Allocate space for all of the .got subsections. */
2637 for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
2639 asection *s = alpha_elf_tdata(i)->got;
2642 s->contents = (bfd_byte *) bfd_zalloc (i, s->size);
2643 if (s->contents == NULL)
2651 /* The number of dynamic relocations required by a static relocation. */
2654 alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared)
2658 /* May appear in GOT entries. */
2660 return (dynamic ? 2 : shared ? 1 : 0);
2661 case R_ALPHA_TLSLDM:
2663 case R_ALPHA_LITERAL:
2664 case R_ALPHA_GOTTPREL:
2665 return dynamic || shared;
2666 case R_ALPHA_GOTDTPREL:
2669 /* May appear in data sections. */
2670 case R_ALPHA_REFLONG:
2671 case R_ALPHA_REFQUAD:
2672 case R_ALPHA_TPREL64:
2673 return dynamic || shared;
2675 /* Everything else is illegal. We'll issue an error during
2676 relocate_section. */
2682 /* Work out the sizes of the dynamic relocation entries. */
2685 elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h,
2686 struct bfd_link_info *info)
2688 bfd_boolean dynamic;
2689 struct alpha_elf_reloc_entry *relent;
2690 unsigned long entries;
2692 /* If the symbol was defined as a common symbol in a regular object
2693 file, and there was no definition in any dynamic object, then the
2694 linker will have allocated space for the symbol in a common
2695 section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
2696 set. This is done for dynamic symbols in
2697 elf_adjust_dynamic_symbol but this is not done for non-dynamic
2698 symbols, somehow. */
2699 if (!h->root.def_regular
2700 && h->root.ref_regular
2701 && !h->root.def_dynamic
2702 && (h->root.root.type == bfd_link_hash_defined
2703 || h->root.root.type == bfd_link_hash_defweak)
2704 && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
2705 h->root.def_regular = 1;
2707 /* If the symbol is dynamic, we'll need all the relocations in their
2708 natural form. If this is a shared object, and it has been forced
2709 local, we'll need the same number of RELATIVE relocations. */
2710 dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
2712 /* If the symbol is a hidden undefined weak, then we never have any
2713 relocations. Avoid the loop which may want to add RELATIVE relocs
2714 based on info->shared. */
2715 if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
2718 for (relent = h->reloc_entries; relent; relent = relent->next)
2720 entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
2724 relent->srel->size +=
2725 entries * sizeof (Elf64_External_Rela) * relent->count;
2726 if (relent->reltext)
2727 info->flags |= DT_TEXTREL;
2734 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
2738 elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h,
2739 struct bfd_link_info *info)
2741 bfd_boolean dynamic;
2742 struct alpha_elf_got_entry *gotent;
2743 unsigned long entries;
2745 /* If we're using a plt for this symbol, then all of its relocations
2746 for its got entries go into .rela.plt. */
2747 if (h->root.needs_plt)
2750 /* If the symbol is dynamic, we'll need all the relocations in their
2751 natural form. If this is a shared object, and it has been forced
2752 local, we'll need the same number of RELATIVE relocations. */
2753 dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
2755 /* If the symbol is a hidden undefined weak, then we never have any
2756 relocations. Avoid the loop which may want to add RELATIVE relocs
2757 based on info->shared. */
2758 if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
2762 for (gotent = h->got_entries; gotent ; gotent = gotent->next)
2763 if (gotent->use_count > 0)
2764 entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type,
2765 dynamic, info->shared);
2769 bfd *dynobj = elf_hash_table(info)->dynobj;
2770 asection *srel = bfd_get_section_by_name (dynobj, ".rela.got");
2771 BFD_ASSERT (srel != NULL);
2772 srel->size += sizeof (Elf64_External_Rela) * entries;
2778 /* Set the sizes of the dynamic relocation sections. */
2781 elf64_alpha_size_rela_got_section (struct bfd_link_info *info)
2783 unsigned long entries;
2786 struct alpha_elf_link_hash_table * htab;
2788 htab = alpha_elf_hash_table (info);
2792 /* Shared libraries often require RELATIVE relocs, and some relocs
2793 require attention for the main application as well. */
2796 for (i = htab->got_list;
2797 i ; i = alpha_elf_tdata(i)->got_link_next)
2801 for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
2803 struct alpha_elf_got_entry **local_got_entries, *gotent;
2806 local_got_entries = alpha_elf_tdata(j)->local_got_entries;
2807 if (!local_got_entries)
2810 for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
2811 for (gotent = local_got_entries[k];
2812 gotent ; gotent = gotent->next)
2813 if (gotent->use_count > 0)
2814 entries += (alpha_dynamic_entries_for_reloc
2815 (gotent->reloc_type, 0, info->shared));
2819 dynobj = elf_hash_table(info)->dynobj;
2820 srel = bfd_get_section_by_name (dynobj, ".rela.got");
2823 BFD_ASSERT (entries == 0);
2826 srel->size = sizeof (Elf64_External_Rela) * entries;
2828 /* Now do the non-local symbols. */
2829 alpha_elf_link_hash_traverse (htab,
2830 elf64_alpha_size_rela_got_1, info);
2833 /* Set the sizes of the dynamic sections. */
2836 elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2837 struct bfd_link_info *info)
2842 struct alpha_elf_link_hash_table * htab;
2844 htab = alpha_elf_hash_table (info);
2848 dynobj = elf_hash_table(info)->dynobj;
2849 BFD_ASSERT(dynobj != NULL);
2851 if (elf_hash_table (info)->dynamic_sections_created)
2853 /* Set the contents of the .interp section to the interpreter. */
2854 if (info->executable)
2856 s = bfd_get_section_by_name (dynobj, ".interp");
2857 BFD_ASSERT (s != NULL);
2858 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2859 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2862 /* Now that we've seen all of the input files, we can decide which
2863 symbols need dynamic relocation entries and which don't. We've
2864 collected information in check_relocs that we can now apply to
2865 size the dynamic relocation sections. */
2866 alpha_elf_link_hash_traverse (htab,
2867 elf64_alpha_calc_dynrel_sizes, info);
2869 elf64_alpha_size_rela_got_section (info);
2870 elf64_alpha_size_plt_section (info);
2872 /* else we're not dynamic and by definition we don't need such things. */
2874 /* The check_relocs and adjust_dynamic_symbol entry points have
2875 determined the sizes of the various dynamic sections. Allocate
2878 for (s = dynobj->sections; s != NULL; s = s->next)
2882 if (!(s->flags & SEC_LINKER_CREATED))
2885 /* It's OK to base decisions on the section name, because none
2886 of the dynobj section names depend upon the input files. */
2887 name = bfd_get_section_name (dynobj, s);
2889 if (CONST_STRNEQ (name, ".rela"))
2893 if (strcmp (name, ".rela.plt") == 0)
2896 /* We use the reloc_count field as a counter if we need
2897 to copy relocs into the output file. */
2901 else if (! CONST_STRNEQ (name, ".got")
2902 && strcmp (name, ".plt") != 0
2903 && strcmp (name, ".dynbss") != 0)
2905 /* It's not one of our dynamic sections, so don't allocate space. */
2911 /* If we don't need this section, strip it from the output file.
2912 This is to handle .rela.bss and .rela.plt. We must create it
2913 in create_dynamic_sections, because it must be created before
2914 the linker maps input sections to output sections. The
2915 linker does that before adjust_dynamic_symbol is called, and
2916 it is that function which decides whether anything needs to
2917 go into these sections. */
2918 if (!CONST_STRNEQ (name, ".got"))
2919 s->flags |= SEC_EXCLUDE;
2921 else if ((s->flags & SEC_HAS_CONTENTS) != 0)
2923 /* Allocate memory for the section contents. */
2924 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2925 if (s->contents == NULL)
2930 if (elf_hash_table (info)->dynamic_sections_created)
2932 /* Add some entries to the .dynamic section. We fill in the
2933 values later, in elf64_alpha_finish_dynamic_sections, but we
2934 must add the entries now so that we get the correct size for
2935 the .dynamic section. The DT_DEBUG entry is filled in by the
2936 dynamic linker and used by the debugger. */
2937 #define add_dynamic_entry(TAG, VAL) \
2938 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2940 if (info->executable)
2942 if (!add_dynamic_entry (DT_DEBUG, 0))
2948 if (!add_dynamic_entry (DT_PLTGOT, 0)
2949 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2950 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2951 || !add_dynamic_entry (DT_JMPREL, 0))
2954 if (elf64_alpha_use_secureplt
2955 && !add_dynamic_entry (DT_ALPHA_PLTRO, 1))
2959 if (!add_dynamic_entry (DT_RELA, 0)
2960 || !add_dynamic_entry (DT_RELASZ, 0)
2961 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2964 if (info->flags & DF_TEXTREL)
2966 if (!add_dynamic_entry (DT_TEXTREL, 0))
2970 #undef add_dynamic_entry
2975 /* These functions do relaxation for Alpha ELF.
2977 Currently I'm only handling what I can do with existing compiler
2978 and assembler support, which means no instructions are removed,
2979 though some may be nopped. At this time GCC does not emit enough
2980 information to do all of the relaxing that is possible. It will
2981 take some not small amount of work for that to happen.
2983 There are a couple of interesting papers that I once read on this
2984 subject, that I cannot find references to at the moment, that
2985 related to Alpha in particular. They are by David Wall, then of
2988 struct alpha_relax_info
2993 Elf_Internal_Shdr *symtab_hdr;
2994 Elf_Internal_Rela *relocs, *relend;
2995 struct bfd_link_info *link_info;
2999 struct alpha_elf_link_hash_entry *h;
3000 struct alpha_elf_got_entry **first_gotent;
3001 struct alpha_elf_got_entry *gotent;
3002 bfd_boolean changed_contents;
3003 bfd_boolean changed_relocs;
3004 unsigned char other;
3007 static Elf_Internal_Rela *
3008 elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel,
3009 Elf_Internal_Rela *relend,
3010 bfd_vma offset, int type)
3012 while (rel < relend)
3014 if (rel->r_offset == offset
3015 && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
3023 elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval,
3024 Elf_Internal_Rela *irel, unsigned long r_type)
3027 bfd_signed_vma disp;
3029 /* Get the instruction. */
3030 insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
3032 if (insn >> 26 != OP_LDQ)
3034 reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
3035 ((*_bfd_error_handler)
3036 ("%B: %A+0x%lx: warning: %s relocation against unexpected insn",
3037 info->abfd, info->sec,
3038 (unsigned long) irel->r_offset, howto->name));
3042 /* Can't relax dynamic symbols. */
3043 if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
3046 /* Can't use local-exec relocations in shared libraries. */
3047 if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared)
3050 if (r_type == R_ALPHA_LITERAL)
3052 /* Look for nice constant addresses. This includes the not-uncommon
3053 special case of 0 for undefweak symbols. */
3054 if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak)
3055 || (!info->link_info->shared
3056 && (symval >= (bfd_vma)-0x8000 || symval < 0x8000)))
3059 insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
3060 insn |= (symval & 0xffff);
3061 r_type = R_ALPHA_NONE;
3065 disp = symval - info->gp;
3066 insn = (OP_LDA << 26) | (insn & 0x03ff0000);
3067 r_type = R_ALPHA_GPREL16;
3072 bfd_vma dtp_base, tp_base;
3074 BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
3075 dtp_base = alpha_get_dtprel_base (info->link_info);
3076 tp_base = alpha_get_tprel_base (info->link_info);
3077 disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
3079 insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
3083 case R_ALPHA_GOTDTPREL:
3084 r_type = R_ALPHA_DTPREL16;
3086 case R_ALPHA_GOTTPREL:
3087 r_type = R_ALPHA_TPREL16;
3095 if (disp < -0x8000 || disp >= 0x8000)
3098 bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
3099 info->changed_contents = TRUE;
3101 /* Reduce the use count on this got entry by one, possibly
3103 if (--info->gotent->use_count == 0)
3105 int sz = alpha_got_entry_size (r_type);
3106 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
3108 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
3111 /* Smash the existing GOT relocation for its 16-bit immediate pair. */
3112 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
3113 info->changed_relocs = TRUE;
3115 /* ??? Search forward through this basic block looking for insns
3116 that use the target register. Stop after an insn modifying the
3117 register is seen, or after a branch or call.
3119 Any such memory load insn may be substituted by a load directly
3120 off the GP. This allows the memory load insn to be issued before
3121 the calculated GP register would otherwise be ready.
3123 Any such jsr insn can be replaced by a bsr if it is in range.
3125 This would mean that we'd have to _add_ relocations, the pain of
3126 which gives one pause. */
3132 elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval)
3134 /* If the function has the same gp, and we can identify that the
3135 function does not use its function pointer, we can eliminate the
3138 /* If the symbol is marked NOPV, we are being told the function never
3139 needs its procedure value. */
3140 if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
3143 /* If the symbol is marked STD_GP, we are being told the function does
3144 a normal ldgp in the first two words. */
3145 else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
3148 /* Otherwise, we may be able to identify a GP load in the first two
3149 words, which we can then skip. */
3152 Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
3155 /* Load the relocations from the section that the target symbol is in. */
3156 if (info->sec == info->tsec)
3158 tsec_relocs = info->relocs;
3159 tsec_relend = info->relend;
3164 tsec_relocs = (_bfd_elf_link_read_relocs
3165 (info->abfd, info->tsec, (PTR) NULL,
3166 (Elf_Internal_Rela *) NULL,
3167 info->link_info->keep_memory));
3168 if (tsec_relocs == NULL)
3170 tsec_relend = tsec_relocs + info->tsec->reloc_count;
3171 tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
3174 /* Recover the symbol's offset within the section. */
3175 ofs = (symval - info->tsec->output_section->vma
3176 - info->tsec->output_offset);
3178 /* Look for a GPDISP reloc. */
3179 gpdisp = (elf64_alpha_find_reloc_at_ofs
3180 (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
3182 if (!gpdisp || gpdisp->r_addend != 4)
3192 /* We've now determined that we can skip an initial gp load. Verify
3193 that the call and the target use the same gp. */
3194 if (info->link_info->output_bfd->xvec != info->tsec->owner->xvec
3195 || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
3202 elf64_alpha_relax_with_lituse (struct alpha_relax_info *info,
3203 bfd_vma symval, Elf_Internal_Rela *irel)
3205 Elf_Internal_Rela *urel, *irelend = info->relend;
3206 int flags, count, i;
3207 bfd_signed_vma disp;
3210 bfd_boolean lit_reused = FALSE;
3211 bfd_boolean all_optimized = TRUE;
3212 unsigned int lit_insn;
3214 lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
3215 if (lit_insn >> 26 != OP_LDQ)
3217 ((*_bfd_error_handler)
3218 ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn",
3219 info->abfd, info->sec,
3220 (unsigned long) irel->r_offset));
3224 /* Can't relax dynamic symbols. */
3225 if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
3228 /* Summarize how this particular LITERAL is used. */
3229 for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
3231 if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
3233 if (urel->r_addend <= 6)
3234 flags |= 1 << urel->r_addend;
3237 /* A little preparation for the loop... */
3238 disp = symval - info->gp;
3240 for (urel = irel+1, i = 0; i < count; ++i, ++urel)
3244 bfd_signed_vma xdisp;
3246 insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
3248 switch (urel->r_addend)
3250 case LITUSE_ALPHA_ADDR:
3252 /* This type is really just a placeholder to note that all
3253 uses cannot be optimized, but to still allow some. */
3254 all_optimized = FALSE;
3257 case LITUSE_ALPHA_BASE:
3258 /* We can always optimize 16-bit displacements. */
3260 /* Extract the displacement from the instruction, sign-extending
3261 it if necessary, then test whether it is within 16 or 32 bits
3262 displacement from GP. */
3263 insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000;
3265 xdisp = disp + insn_disp;
3266 fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
3267 fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
3268 && xdisp < 0x7fff8000);
3272 /* Take the op code and dest from this insn, take the base
3273 register from the literal insn. Leave the offset alone. */
3274 insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
3275 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
3277 urel->r_addend = irel->r_addend;
3278 info->changed_relocs = TRUE;
3280 bfd_put_32 (info->abfd, (bfd_vma) insn,
3281 info->contents + urel->r_offset);
3282 info->changed_contents = TRUE;
3285 /* If all mem+byte, we can optimize 32-bit mem displacements. */
3286 else if (fits32 && !(flags & ~6))
3288 /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
3290 irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
3292 lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
3293 bfd_put_32 (info->abfd, (bfd_vma) lit_insn,
3294 info->contents + irel->r_offset);
3296 info->changed_contents = TRUE;
3298 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
3300 urel->r_addend = irel->r_addend;
3301 info->changed_relocs = TRUE;
3304 all_optimized = FALSE;
3307 case LITUSE_ALPHA_BYTOFF:
3308 /* We can always optimize byte instructions. */
3310 /* FIXME: sanity check the insn for byte op. Check that the
3311 literal dest reg is indeed Rb in the byte insn. */
3313 insn &= ~ (unsigned) 0x001ff000;
3314 insn |= ((symval & 7) << 13) | 0x1000;
3316 urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3318 info->changed_relocs = TRUE;
3320 bfd_put_32 (info->abfd, (bfd_vma) insn,
3321 info->contents + urel->r_offset);
3322 info->changed_contents = TRUE;
3325 case LITUSE_ALPHA_JSR:
3326 case LITUSE_ALPHA_TLSGD:
3327 case LITUSE_ALPHA_TLSLDM:
3328 case LITUSE_ALPHA_JSRDIRECT:
3330 bfd_vma optdest, org;
3331 bfd_signed_vma odisp;
3333 /* For undefined weak symbols, we're mostly interested in getting
3334 rid of the got entry whenever possible, so optimize this to a
3335 use of the zero register. */
3336 if (info->h && info->h->root.root.type == bfd_link_hash_undefweak)
3339 bfd_put_32 (info->abfd, (bfd_vma) insn,
3340 info->contents + urel->r_offset);
3342 info->changed_contents = TRUE;
3346 /* If not zero, place to jump without needing pv. */
3347 optdest = elf64_alpha_relax_opt_call (info, symval);
3348 org = (info->sec->output_section->vma
3349 + info->sec->output_offset
3350 + urel->r_offset + 4);
3351 odisp = (optdest ? optdest : symval) - org;
3353 if (odisp >= -0x400000 && odisp < 0x400000)
3355 Elf_Internal_Rela *xrel;
3357 /* Preserve branch prediction call stack when possible. */
3358 if ((insn & INSN_JSR_MASK) == INSN_JSR)
3359 insn = (OP_BSR << 26) | (insn & 0x03e00000);
3361 insn = (OP_BR << 26) | (insn & 0x03e00000);
3363 urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
3365 urel->r_addend = irel->r_addend;
3368 urel->r_addend += optdest - symval;
3370 all_optimized = FALSE;
3372 bfd_put_32 (info->abfd, (bfd_vma) insn,
3373 info->contents + urel->r_offset);
3375 /* Kill any HINT reloc that might exist for this insn. */
3376 xrel = (elf64_alpha_find_reloc_at_ofs
3377 (info->relocs, info->relend, urel->r_offset,
3380 xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3382 info->changed_contents = TRUE;
3383 info->changed_relocs = TRUE;
3386 all_optimized = FALSE;
3388 /* Even if the target is not in range for a direct branch,
3389 if we share a GP, we can eliminate the gp reload. */
3392 Elf_Internal_Rela *gpdisp
3393 = (elf64_alpha_find_reloc_at_ofs
3394 (info->relocs, irelend, urel->r_offset + 4,
3398 bfd_byte *p_ldah = info->contents + gpdisp->r_offset;
3399 bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
3400 unsigned int ldah = bfd_get_32 (info->abfd, p_ldah);
3401 unsigned int lda = bfd_get_32 (info->abfd, p_lda);
3403 /* Verify that the instruction is "ldah $29,0($26)".
3404 Consider a function that ends in a noreturn call,
3405 and that the next function begins with an ldgp,
3406 and that by accident there is no padding between.
3407 In that case the insn would use $27 as the base. */
3408 if (ldah == 0x27ba0000 && lda == 0x23bd0000)
3410 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah);
3411 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda);
3413 gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3414 info->changed_contents = TRUE;
3415 info->changed_relocs = TRUE;
3424 /* If all cases were optimized, we can reduce the use count on this
3425 got entry by one, possibly eliminating it. */
3428 if (--info->gotent->use_count == 0)
3430 int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
3431 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
3433 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
3436 /* If the literal instruction is no longer needed (it may have been
3437 reused. We can eliminate it. */
3438 /* ??? For now, I don't want to deal with compacting the section,
3439 so just nop it out. */
3442 irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3443 info->changed_relocs = TRUE;
3445 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP,
3446 info->contents + irel->r_offset);
3447 info->changed_contents = TRUE;
3453 return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL);
3457 elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval,
3458 Elf_Internal_Rela *irel, bfd_boolean is_gd)
3461 unsigned int insn, tlsgd_reg;
3462 Elf_Internal_Rela *gpdisp, *hint;
3463 bfd_boolean dynamic, use_gottprel;
3464 unsigned long new_symndx;
3466 dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
3468 /* If a TLS symbol is accessed using IE at least once, there is no point
3469 to use dynamic model for it. */
3470 if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
3473 /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
3474 then we might as well relax to IE. */
3475 else if (info->link_info->shared && !dynamic
3476 && (info->link_info->flags & DF_STATIC_TLS))
3479 /* Otherwise we must be building an executable to do anything. */
3480 else if (info->link_info->shared)
3483 /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
3484 the matching LITUSE_TLS relocations. */
3485 if (irel + 2 >= info->relend)
3487 if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
3488 || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
3489 || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
3492 /* There must be a GPDISP relocation positioned immediately after the
3493 LITUSE relocation. */
3494 gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
3495 irel[2].r_offset + 4, R_ALPHA_GPDISP);
3499 pos[0] = info->contents + irel[0].r_offset;
3500 pos[1] = info->contents + irel[1].r_offset;
3501 pos[2] = info->contents + irel[2].r_offset;
3502 pos[3] = info->contents + gpdisp->r_offset;
3503 pos[4] = pos[3] + gpdisp->r_addend;
3505 /* Generally, the positions are not allowed to be out of order, lest the
3506 modified insn sequence have different register lifetimes. We can make
3507 an exception when pos 1 is adjacent to pos 0. */
3508 if (pos[1] + 4 == pos[0])
3510 bfd_byte *tmp = pos[0];
3514 if (pos[1] >= pos[2] || pos[2] >= pos[3])
3517 /* Reduce the use count on the LITERAL relocation. Do this before we
3518 smash the symndx when we adjust the relocations below. */
3520 struct alpha_elf_got_entry *lit_gotent;
3521 struct alpha_elf_link_hash_entry *lit_h;
3524 BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
3525 indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
3526 lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
3528 while (lit_h->root.root.type == bfd_link_hash_indirect
3529 || lit_h->root.root.type == bfd_link_hash_warning)
3530 lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
3532 for (lit_gotent = lit_h->got_entries; lit_gotent ;
3533 lit_gotent = lit_gotent->next)
3534 if (lit_gotent->gotobj == info->gotobj
3535 && lit_gotent->reloc_type == R_ALPHA_LITERAL
3536 && lit_gotent->addend == irel[1].r_addend)
3538 BFD_ASSERT (lit_gotent);
3540 if (--lit_gotent->use_count == 0)
3542 int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
3543 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
3549 lda $16,x($gp) !tlsgd!1
3550 ldq $27,__tls_get_addr($gp) !literal!1
3551 jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
3552 ldah $29,0($26) !gpdisp!2
3553 lda $29,0($29) !gpdisp!2
3555 ldq $16,x($gp) !gottprel
3560 or the first pair to
3561 lda $16,x($gp) !tprel
3564 ldah $16,x($gp) !tprelhi
3565 lda $16,x($16) !tprello
3569 use_gottprel = FALSE;
3570 new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF;
3572 /* Beware of the compiler hoisting part of the sequence out a loop
3573 and adjusting the destination register for the TLSGD insn. If this
3574 happens, there will be a move into $16 before the JSR insn, so only
3575 transformations of the first insn pair should use this register. */
3576 tlsgd_reg = bfd_get_32 (info->abfd, pos[0]);
3577 tlsgd_reg = (tlsgd_reg >> 21) & 31;
3579 switch (!dynamic && !info->link_info->shared)
3584 bfd_signed_vma disp;
3586 BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
3587 tp_base = alpha_get_tprel_base (info->link_info);
3588 disp = symval - tp_base;
3590 if (disp >= -0x8000 && disp < 0x8000)
3592 insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16);
3593 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
3594 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
3596 irel[0].r_offset = pos[0] - info->contents;
3597 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16);
3598 irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3601 else if (disp >= -(bfd_signed_vma) 0x80000000
3602 && disp < (bfd_signed_vma) 0x7fff8000
3603 && pos[0] + 4 == pos[1])
3605 insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16);
3606 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
3607 insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16);
3608 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
3610 irel[0].r_offset = pos[0] - info->contents;
3611 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI);
3612 irel[1].r_offset = pos[1] - info->contents;
3613 irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO);
3620 use_gottprel = TRUE;
3622 insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16);
3623 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
3624 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
3626 irel[0].r_offset = pos[0] - info->contents;
3627 irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL);
3628 irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3632 bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
3634 insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
3635 bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
3637 bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
3639 irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3640 gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3642 hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
3643 irel[2].r_offset, R_ALPHA_HINT);
3645 hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
3647 info->changed_contents = TRUE;
3648 info->changed_relocs = TRUE;
3650 /* Reduce the use count on the TLSGD/TLSLDM relocation. */
3651 if (--info->gotent->use_count == 0)
3653 int sz = alpha_got_entry_size (info->gotent->reloc_type);
3654 alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
3656 alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
3659 /* If we've switched to a GOTTPREL relocation, increment the reference
3660 count on that got entry. */
3663 struct alpha_elf_got_entry *tprel_gotent;
3665 for (tprel_gotent = *info->first_gotent; tprel_gotent ;
3666 tprel_gotent = tprel_gotent->next)
3667 if (tprel_gotent->gotobj == info->gotobj
3668 && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
3669 && tprel_gotent->addend == irel->r_addend)
3672 tprel_gotent->use_count++;
3675 if (info->gotent->use_count == 0)
3676 tprel_gotent = info->gotent;
3679 tprel_gotent = (struct alpha_elf_got_entry *)
3680 bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
3684 tprel_gotent->next = *info->first_gotent;
3685 *info->first_gotent = tprel_gotent;
3687 tprel_gotent->gotobj = info->gotobj;
3688 tprel_gotent->addend = irel->r_addend;
3689 tprel_gotent->got_offset = -1;
3690 tprel_gotent->reloc_done = 0;
3691 tprel_gotent->reloc_xlated = 0;
3694 tprel_gotent->use_count = 1;
3695 tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
3703 elf64_alpha_relax_section (bfd *abfd, asection *sec,
3704 struct bfd_link_info *link_info, bfd_boolean *again)
3706 Elf_Internal_Shdr *symtab_hdr;
3707 Elf_Internal_Rela *internal_relocs;
3708 Elf_Internal_Rela *irel, *irelend;
3709 Elf_Internal_Sym *isymbuf = NULL;
3710 struct alpha_elf_got_entry **local_got_entries;
3711 struct alpha_relax_info info;
3712 struct alpha_elf_link_hash_table * htab;
3714 htab = alpha_elf_hash_table (link_info);
3718 /* There's nothing to change, yet. */
3721 if (link_info->relocatable
3722 || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC))
3723 != (SEC_CODE | SEC_RELOC | SEC_ALLOC))
3724 || sec->reloc_count == 0)
3727 BFD_ASSERT (is_alpha_elf (abfd));
3729 /* Make sure our GOT and PLT tables are up-to-date. */
3730 if (htab->relax_trip != link_info->relax_trip)
3732 htab->relax_trip = link_info->relax_trip;
3734 /* This should never fail after the initial round, since the only
3735 error is GOT overflow, and relaxation only shrinks the table. */
3736 if (!elf64_alpha_size_got_sections (link_info))
3738 if (elf_hash_table (link_info)->dynamic_sections_created)
3740 elf64_alpha_size_plt_section (link_info);
3741 elf64_alpha_size_rela_got_section (link_info);
3745 symtab_hdr = &elf_symtab_hdr (abfd);
3746 local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
3748 /* Load the relocations for this section. */
3749 internal_relocs = (_bfd_elf_link_read_relocs
3750 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
3751 link_info->keep_memory));
3752 if (internal_relocs == NULL)
3755 memset(&info, 0, sizeof (info));
3758 info.link_info = link_info;
3759 info.symtab_hdr = symtab_hdr;
3760 info.relocs = internal_relocs;
3761 info.relend = irelend = internal_relocs + sec->reloc_count;
3763 /* Find the GP for this object. Do not store the result back via
3764 _bfd_set_gp_value, since this could change again before final. */
3765 info.gotobj = alpha_elf_tdata (abfd)->gotobj;
3768 asection *sgot = alpha_elf_tdata (info.gotobj)->got;
3769 info.gp = (sgot->output_section->vma
3770 + sgot->output_offset
3774 /* Get the section contents. */
3775 if (elf_section_data (sec)->this_hdr.contents != NULL)
3776 info.contents = elf_section_data (sec)->this_hdr.contents;
3779 if (!bfd_malloc_and_get_section (abfd, sec, &info.contents))
3783 for (irel = internal_relocs; irel < irelend; irel++)
3786 struct alpha_elf_got_entry *gotent;
3787 unsigned long r_type = ELF64_R_TYPE (irel->r_info);
3788 unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
3790 /* Early exit for unhandled or unrelaxable relocations. */
3793 case R_ALPHA_LITERAL:
3794 case R_ALPHA_GPRELHIGH:
3795 case R_ALPHA_GPRELLOW:
3796 case R_ALPHA_GOTDTPREL:
3797 case R_ALPHA_GOTTPREL:
3801 case R_ALPHA_TLSLDM:
3802 /* The symbol for a TLSLDM reloc is ignored. Collapse the
3803 reloc to the STN_UNDEF (0) symbol so that they all match. */
3804 r_symndx = STN_UNDEF;
3811 /* Get the value of the symbol referred to by the reloc. */
3812 if (r_symndx < symtab_hdr->sh_info)
3814 /* A local symbol. */
3815 Elf_Internal_Sym *isym;
3817 /* Read this BFD's local symbols. */
3818 if (isymbuf == NULL)
3820 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3821 if (isymbuf == NULL)
3822 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
3823 symtab_hdr->sh_info, 0,
3825 if (isymbuf == NULL)
3829 isym = isymbuf + r_symndx;
3831 /* Given the symbol for a TLSLDM reloc is ignored, this also
3832 means forcing the symbol value to the tp base. */
3833 if (r_type == R_ALPHA_TLSLDM)
3835 info.tsec = bfd_abs_section_ptr;
3836 symval = alpha_get_tprel_base (info.link_info);
3840 symval = isym->st_value;
3841 if (isym->st_shndx == SHN_UNDEF)
3843 else if (isym->st_shndx == SHN_ABS)
3844 info.tsec = bfd_abs_section_ptr;
3845 else if (isym->st_shndx == SHN_COMMON)
3846 info.tsec = bfd_com_section_ptr;
3848 info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3852 info.other = isym->st_other;
3853 if (local_got_entries)
3854 info.first_gotent = &local_got_entries[r_symndx];
3857 info.first_gotent = &info.gotent;
3864 struct alpha_elf_link_hash_entry *h;
3866 indx = r_symndx - symtab_hdr->sh_info;
3867 h = alpha_elf_sym_hashes (abfd)[indx];
3868 BFD_ASSERT (h != NULL);
3870 while (h->root.root.type == bfd_link_hash_indirect
3871 || h->root.root.type == bfd_link_hash_warning)
3872 h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3874 /* If the symbol is undefined, we can't do anything with it. */
3875 if (h->root.root.type == bfd_link_hash_undefined)
3878 /* If the symbol isn't defined in the current module,
3879 again we can't do anything. */
3880 if (h->root.root.type == bfd_link_hash_undefweak)
3882 info.tsec = bfd_abs_section_ptr;
3885 else if (!h->root.def_regular)
3887 /* Except for TLSGD relocs, which can sometimes be
3888 relaxed to GOTTPREL relocs. */
3889 if (r_type != R_ALPHA_TLSGD)
3891 info.tsec = bfd_abs_section_ptr;
3896 info.tsec = h->root.root.u.def.section;
3897 symval = h->root.root.u.def.value;
3901 info.other = h->root.other;
3902 info.first_gotent = &h->got_entries;
3905 /* Search for the got entry to be used by this relocation. */
3906 for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
3907 if (gotent->gotobj == info.gotobj
3908 && gotent->reloc_type == r_type
3909 && gotent->addend == irel->r_addend)
3911 info.gotent = gotent;
3913 symval += info.tsec->output_section->vma + info.tsec->output_offset;
3914 symval += irel->r_addend;
3918 case R_ALPHA_LITERAL:
3919 BFD_ASSERT(info.gotent != NULL);
3921 /* If there exist LITUSE relocations immediately following, this
3922 opens up all sorts of interesting optimizations, because we
3923 now know every location that this address load is used. */
3924 if (irel+1 < irelend
3925 && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
3927 if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
3932 if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
3937 case R_ALPHA_GOTDTPREL:
3938 case R_ALPHA_GOTTPREL:
3939 BFD_ASSERT(info.gotent != NULL);
3940 if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
3945 case R_ALPHA_TLSLDM:
3946 BFD_ASSERT(info.gotent != NULL);
3947 if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
3948 r_type == R_ALPHA_TLSGD))
3955 && symtab_hdr->contents != (unsigned char *) isymbuf)
3957 if (!link_info->keep_memory)
3961 /* Cache the symbols for elf_link_input_bfd. */
3962 symtab_hdr->contents = (unsigned char *) isymbuf;
3966 if (info.contents != NULL
3967 && elf_section_data (sec)->this_hdr.contents != info.contents)
3969 if (!info.changed_contents && !link_info->keep_memory)
3970 free (info.contents);
3973 /* Cache the section contents for elf_link_input_bfd. */
3974 elf_section_data (sec)->this_hdr.contents = info.contents;
3978 if (elf_section_data (sec)->relocs != internal_relocs)
3980 if (!info.changed_relocs)
3981 free (internal_relocs);
3983 elf_section_data (sec)->relocs = internal_relocs;
3986 *again = info.changed_contents || info.changed_relocs;
3992 && symtab_hdr->contents != (unsigned char *) isymbuf)
3994 if (info.contents != NULL
3995 && elf_section_data (sec)->this_hdr.contents != info.contents)
3996 free (info.contents);
3997 if (internal_relocs != NULL
3998 && elf_section_data (sec)->relocs != internal_relocs)
3999 free (internal_relocs);
4003 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4004 into the next available slot in SREL. */
4007 elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info,
4008 asection *sec, asection *srel, bfd_vma offset,
4009 long dynindx, long rtype, bfd_vma addend)
4011 Elf_Internal_Rela outrel;
4014 BFD_ASSERT (srel != NULL);
4016 outrel.r_info = ELF64_R_INFO (dynindx, rtype);
4017 outrel.r_addend = addend;
4019 offset = _bfd_elf_section_offset (abfd, info, sec, offset);
4020 if ((offset | 1) != (bfd_vma) -1)
4021 outrel.r_offset = sec->output_section->vma + sec->output_offset + offset;
4023 memset (&outrel, 0, sizeof (outrel));
4025 loc = srel->contents;
4026 loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
4027 bfd_elf64_swap_reloca_out (abfd, &outrel, loc);
4028 BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size);
4031 /* Relocate an Alpha ELF section for a relocatable link.
4033 We don't have to change anything unless the reloc is against a section
4034 symbol, in which case we have to adjust according to where the section
4035 symbol winds up in the output section. */
4038 elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED,
4039 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4040 bfd *input_bfd, asection *input_section,
4041 bfd_byte *contents ATTRIBUTE_UNUSED,
4042 Elf_Internal_Rela *relocs,
4043 Elf_Internal_Sym *local_syms,
4044 asection **local_sections)
4046 unsigned long symtab_hdr_sh_info;
4047 Elf_Internal_Rela *rel;
4048 Elf_Internal_Rela *relend;
4049 struct elf_link_hash_entry **sym_hashes;
4050 bfd_boolean ret_val = TRUE;
4052 symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info;
4053 sym_hashes = elf_sym_hashes (input_bfd);
4055 relend = relocs + input_section->reloc_count;
4056 for (rel = relocs; rel < relend; rel++)
4058 unsigned long r_symndx;
4059 Elf_Internal_Sym *sym;
4061 unsigned long r_type;
4063 r_type = ELF64_R_TYPE (rel->r_info);
4064 if (r_type >= R_ALPHA_max)
4066 (*_bfd_error_handler)
4067 (_("%B: unknown relocation type %d"),
4068 input_bfd, (int) r_type);
4069 bfd_set_error (bfd_error_bad_value);
4074 /* The symbol associated with GPDISP and LITUSE is
4075 immaterial. Only the addend is significant. */
4076 if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
4079 r_symndx = ELF64_R_SYM (rel->r_info);
4080 if (r_symndx < symtab_hdr_sh_info)
4082 sym = local_syms + r_symndx;
4083 sec = local_sections[r_symndx];
4087 struct elf_link_hash_entry *h;
4089 h = sym_hashes[r_symndx - symtab_hdr_sh_info];
4091 while (h->root.type == bfd_link_hash_indirect
4092 || h->root.type == bfd_link_hash_warning)
4093 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4095 if (h->root.type != bfd_link_hash_defined
4096 && h->root.type != bfd_link_hash_defweak)
4100 sec = h->root.u.def.section;
4103 if (sec != NULL && elf_discarded_section (sec))
4104 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
4106 elf64_alpha_howto_table + r_type,
4109 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
4110 rel->r_addend += sec->output_offset;
4116 /* Relocate an Alpha ELF section. */
4119 elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
4120 bfd *input_bfd, asection *input_section,
4121 bfd_byte *contents, Elf_Internal_Rela *relocs,
4122 Elf_Internal_Sym *local_syms,
4123 asection **local_sections)
4125 Elf_Internal_Shdr *symtab_hdr;
4126 Elf_Internal_Rela *rel;
4127 Elf_Internal_Rela *relend;
4128 asection *sgot, *srel, *srelgot;
4129 bfd *dynobj, *gotobj;
4130 bfd_vma gp, tp_base, dtp_base;
4131 struct alpha_elf_got_entry **local_got_entries;
4132 bfd_boolean ret_val;
4134 BFD_ASSERT (is_alpha_elf (input_bfd));
4136 /* Handle relocatable links with a smaller loop. */
4137 if (info->relocatable)
4138 return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd,
4139 input_section, contents, relocs,
4140 local_syms, local_sections);
4142 /* This is a final link. */
4146 symtab_hdr = &elf_symtab_hdr (input_bfd);
4148 dynobj = elf_hash_table (info)->dynobj;
4150 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
4154 if (input_section->flags & SEC_ALLOC)
4156 const char *section_name;
4157 section_name = (bfd_elf_string_from_elf_section
4158 (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
4159 _bfd_elf_single_rel_hdr (input_section)->sh_name));
4160 BFD_ASSERT(section_name != NULL);
4161 srel = bfd_get_section_by_name (dynobj, section_name);
4166 /* Find the gp value for this input bfd. */
4167 gotobj = alpha_elf_tdata (input_bfd)->gotobj;
4170 sgot = alpha_elf_tdata (gotobj)->got;
4171 gp = _bfd_get_gp_value (gotobj);
4174 gp = (sgot->output_section->vma
4175 + sgot->output_offset
4177 _bfd_set_gp_value (gotobj, gp);
4186 local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries;
4188 if (elf_hash_table (info)->tls_sec != NULL)
4190 dtp_base = alpha_get_dtprel_base (info);
4191 tp_base = alpha_get_tprel_base (info);
4194 dtp_base = tp_base = 0;
4196 relend = relocs + input_section->reloc_count;
4197 for (rel = relocs; rel < relend; rel++)
4199 struct alpha_elf_link_hash_entry *h = NULL;
4200 struct alpha_elf_got_entry *gotent;
4201 bfd_reloc_status_type r;
4202 reloc_howto_type *howto;
4203 unsigned long r_symndx;
4204 Elf_Internal_Sym *sym = NULL;
4205 asection *sec = NULL;
4208 bfd_boolean dynamic_symbol_p;
4209 bfd_boolean undef_weak_ref = FALSE;
4210 unsigned long r_type;
4212 r_type = ELF64_R_TYPE(rel->r_info);
4213 if (r_type >= R_ALPHA_max)
4215 (*_bfd_error_handler)
4216 (_("%B: unknown relocation type %d"),
4217 input_bfd, (int) r_type);
4218 bfd_set_error (bfd_error_bad_value);
4223 howto = elf64_alpha_howto_table + r_type;
4224 r_symndx = ELF64_R_SYM(rel->r_info);
4226 /* The symbol for a TLSLDM reloc is ignored. Collapse the
4227 reloc to the STN_UNDEF (0) symbol so that they all match. */
4228 if (r_type == R_ALPHA_TLSLDM)
4229 r_symndx = STN_UNDEF;
4231 if (r_symndx < symtab_hdr->sh_info)
4234 sym = local_syms + r_symndx;
4235 sec = local_sections[r_symndx];
4237 value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
4239 /* If this is a tp-relative relocation against sym STN_UNDEF (0),
4240 this is hackery from relax_section. Force the value to
4241 be the tls module base. */
4242 if (r_symndx == STN_UNDEF
4243 && (r_type == R_ALPHA_TLSLDM
4244 || r_type == R_ALPHA_GOTTPREL
4245 || r_type == R_ALPHA_TPREL64
4246 || r_type == R_ALPHA_TPRELHI
4247 || r_type == R_ALPHA_TPRELLO
4248 || r_type == R_ALPHA_TPREL16))
4251 if (local_got_entries)
4252 gotent = local_got_entries[r_symndx];
4256 /* Need to adjust local GOT entries' addends for SEC_MERGE
4257 unless it has been done already. */
4258 if ((sec->flags & SEC_MERGE)
4259 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
4260 && sec->sec_info_type == ELF_INFO_TYPE_MERGE
4262 && !gotent->reloc_xlated)
4264 struct alpha_elf_got_entry *ent;
4266 for (ent = gotent; ent; ent = ent->next)
4268 ent->reloc_xlated = 1;
4269 if (ent->use_count == 0)
4273 _bfd_merged_section_offset (output_bfd, &msec,
4274 elf_section_data (sec)->
4276 sym->st_value + ent->addend);
4277 ent->addend -= sym->st_value;
4278 ent->addend += msec->output_section->vma
4279 + msec->output_offset
4280 - sec->output_section->vma
4281 - sec->output_offset;
4285 dynamic_symbol_p = FALSE;
4290 bfd_boolean unresolved_reloc;
4291 struct elf_link_hash_entry *hh;
4292 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
4294 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4295 r_symndx, symtab_hdr, sym_hashes,
4297 unresolved_reloc, warned);
4303 && ! unresolved_reloc
4304 && hh->root.type == bfd_link_hash_undefweak)
4305 undef_weak_ref = TRUE;
4307 h = (struct alpha_elf_link_hash_entry *) hh;
4308 dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
4309 gotent = h->got_entries;
4312 if (sec != NULL && elf_discarded_section (sec))
4313 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
4314 rel, relend, howto, contents);
4316 addend = rel->r_addend;
4319 /* Search for the proper got entry. */
4320 for (; gotent ; gotent = gotent->next)
4321 if (gotent->gotobj == gotobj
4322 && gotent->reloc_type == r_type
4323 && gotent->addend == addend)
4328 case R_ALPHA_GPDISP:
4330 bfd_byte *p_ldah, *p_lda;
4332 BFD_ASSERT(gp != 0);
4334 value = (input_section->output_section->vma
4335 + input_section->output_offset
4338 p_ldah = contents + rel->r_offset;
4339 p_lda = p_ldah + rel->r_addend;
4341 r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value,
4346 case R_ALPHA_LITERAL:
4347 BFD_ASSERT(sgot != NULL);
4348 BFD_ASSERT(gp != 0);
4349 BFD_ASSERT(gotent != NULL);
4350 BFD_ASSERT(gotent->use_count >= 1);
4352 if (!gotent->reloc_done)
4354 gotent->reloc_done = 1;
4356 bfd_put_64 (output_bfd, value,
4357 sgot->contents + gotent->got_offset);
4359 /* If the symbol has been forced local, output a
4360 RELATIVE reloc, otherwise it will be handled in
4361 finish_dynamic_symbol. */
4362 if (info->shared && !dynamic_symbol_p && !undef_weak_ref)
4363 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4364 gotent->got_offset, 0,
4365 R_ALPHA_RELATIVE, value);
4368 value = (sgot->output_section->vma
4369 + sgot->output_offset
4370 + gotent->got_offset);
4374 case R_ALPHA_GPREL32:
4375 case R_ALPHA_GPREL16:
4376 case R_ALPHA_GPRELLOW:
4377 if (dynamic_symbol_p)
4379 (*_bfd_error_handler)
4380 (_("%B: gp-relative relocation against dynamic symbol %s"),
4381 input_bfd, h->root.root.root.string);
4384 BFD_ASSERT(gp != 0);
4388 case R_ALPHA_GPRELHIGH:
4389 if (dynamic_symbol_p)
4391 (*_bfd_error_handler)
4392 (_("%B: gp-relative relocation against dynamic symbol %s"),
4393 input_bfd, h->root.root.root.string);
4396 BFD_ASSERT(gp != 0);
4398 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4402 /* A call to a dynamic symbol is definitely out of range of
4403 the 16-bit displacement. Don't bother writing anything. */
4404 if (dynamic_symbol_p)
4409 /* The regular PC-relative stuff measures from the start of
4410 the instruction rather than the end. */
4414 case R_ALPHA_BRADDR:
4415 if (dynamic_symbol_p)
4417 (*_bfd_error_handler)
4418 (_("%B: pc-relative relocation against dynamic symbol %s"),
4419 input_bfd, h->root.root.root.string);
4422 /* The regular PC-relative stuff measures from the start of
4423 the instruction rather than the end. */
4432 /* The regular PC-relative stuff measures from the start of
4433 the instruction rather than the end. */
4436 /* The source and destination gp must be the same. Note that
4437 the source will always have an assigned gp, since we forced
4438 one in check_relocs, but that the destination may not, as
4439 it might not have had any relocations at all. Also take
4440 care not to crash if H is an undefined symbol. */
4441 if (h != NULL && sec != NULL
4442 && alpha_elf_tdata (sec->owner)->gotobj
4443 && gotobj != alpha_elf_tdata (sec->owner)->gotobj)
4445 (*_bfd_error_handler)
4446 (_("%B: change in gp: BRSGP %s"),
4447 input_bfd, h->root.root.root.string);
4451 /* The symbol should be marked either NOPV or STD_GPLOAD. */
4453 other = h->root.other;
4455 other = sym->st_other;
4456 switch (other & STO_ALPHA_STD_GPLOAD)
4458 case STO_ALPHA_NOPV:
4460 case STO_ALPHA_STD_GPLOAD:
4465 name = h->root.root.root.string;
4468 name = (bfd_elf_string_from_elf_section
4469 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4471 name = _("<unknown>");
4472 else if (name[0] == 0)
4473 name = bfd_section_name (input_bfd, sec);
4475 (*_bfd_error_handler)
4476 (_("%B: !samegp reloc against symbol without .prologue: %s"),
4485 case R_ALPHA_REFLONG:
4486 case R_ALPHA_REFQUAD:
4487 case R_ALPHA_DTPREL64:
4488 case R_ALPHA_TPREL64:
4490 long dynindx, dyntype = r_type;
4493 /* Careful here to remember RELATIVE relocations for global
4494 variables for symbolic shared objects. */
4496 if (dynamic_symbol_p)
4498 BFD_ASSERT(h->root.dynindx != -1);
4499 dynindx = h->root.dynindx;
4501 addend = 0, value = 0;
4503 else if (r_type == R_ALPHA_DTPREL64)
4505 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4509 else if (r_type == R_ALPHA_TPREL64)
4511 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4518 dynaddend = value - dtp_base;
4520 else if (info->shared
4521 && r_symndx != STN_UNDEF
4522 && (input_section->flags & SEC_ALLOC)
4525 if (r_type == R_ALPHA_REFLONG)
4527 (*_bfd_error_handler)
4528 (_("%B: unhandled dynamic relocation against %s"),
4530 h->root.root.root.string);
4534 dyntype = R_ALPHA_RELATIVE;
4540 if (input_section->flags & SEC_ALLOC)
4541 elf64_alpha_emit_dynrel (output_bfd, info, input_section,
4542 srel, rel->r_offset, dynindx,
4543 dyntype, dynaddend);
4547 case R_ALPHA_SREL16:
4548 case R_ALPHA_SREL32:
4549 case R_ALPHA_SREL64:
4550 if (dynamic_symbol_p)
4552 (*_bfd_error_handler)
4553 (_("%B: pc-relative relocation against dynamic symbol %s"),
4554 input_bfd, h->root.root.root.string);
4557 else if ((info->shared || info->pie) && undef_weak_ref)
4559 (*_bfd_error_handler)
4560 (_("%B: pc-relative relocation against undefined weak symbol %s"),
4561 input_bfd, h->root.root.root.string);
4566 /* ??? .eh_frame references to discarded sections will be smashed
4567 to relocations against SHN_UNDEF. The .eh_frame format allows
4568 NULL to be encoded as 0 in any format, so this works here. */
4569 if (r_symndx == STN_UNDEF)
4570 howto = (elf64_alpha_howto_table
4571 + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
4574 case R_ALPHA_TLSLDM:
4575 /* Ignore the symbol for the relocation. The result is always
4576 the current module. */
4577 dynamic_symbol_p = 0;
4581 if (!gotent->reloc_done)
4583 gotent->reloc_done = 1;
4585 /* Note that the module index for the main program is 1. */
4586 bfd_put_64 (output_bfd, !info->shared && !dynamic_symbol_p,
4587 sgot->contents + gotent->got_offset);
4589 /* If the symbol has been forced local, output a
4590 DTPMOD64 reloc, otherwise it will be handled in
4591 finish_dynamic_symbol. */
4592 if (info->shared && !dynamic_symbol_p)
4593 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4594 gotent->got_offset, 0,
4595 R_ALPHA_DTPMOD64, 0);
4597 if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM)
4601 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4604 bfd_put_64 (output_bfd, value,
4605 sgot->contents + gotent->got_offset + 8);
4608 value = (sgot->output_section->vma
4609 + sgot->output_offset
4610 + gotent->got_offset);
4614 case R_ALPHA_DTPRELHI:
4615 case R_ALPHA_DTPRELLO:
4616 case R_ALPHA_DTPREL16:
4617 if (dynamic_symbol_p)
4619 (*_bfd_error_handler)
4620 (_("%B: dtp-relative relocation against dynamic symbol %s"),
4621 input_bfd, h->root.root.root.string);
4624 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4626 if (r_type == R_ALPHA_DTPRELHI)
4627 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4630 case R_ALPHA_TPRELHI:
4631 case R_ALPHA_TPRELLO:
4632 case R_ALPHA_TPREL16:
4635 (*_bfd_error_handler)
4636 (_("%B: TLS local exec code cannot be linked into shared objects"),
4640 else if (dynamic_symbol_p)
4642 (*_bfd_error_handler)
4643 (_("%B: tp-relative relocation against dynamic symbol %s"),
4644 input_bfd, h->root.root.root.string);
4647 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4649 if (r_type == R_ALPHA_TPRELHI)
4650 value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4653 case R_ALPHA_GOTDTPREL:
4654 case R_ALPHA_GOTTPREL:
4655 BFD_ASSERT(sgot != NULL);
4656 BFD_ASSERT(gp != 0);
4657 BFD_ASSERT(gotent != NULL);
4658 BFD_ASSERT(gotent->use_count >= 1);
4660 if (!gotent->reloc_done)
4662 gotent->reloc_done = 1;
4664 if (dynamic_symbol_p)
4668 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4669 if (r_type == R_ALPHA_GOTDTPREL)
4671 else if (!info->shared)
4675 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4676 gotent->got_offset, 0,
4682 bfd_put_64 (output_bfd, value,
4683 sgot->contents + gotent->got_offset);
4686 value = (sgot->output_section->vma
4687 + sgot->output_offset
4688 + gotent->got_offset);
4694 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4695 contents, rel->r_offset, value, 0);
4704 case bfd_reloc_overflow:
4708 /* Don't warn if the overflow is due to pc relative reloc
4709 against discarded section. Section optimization code should
4712 if (r_symndx < symtab_hdr->sh_info
4713 && sec != NULL && howto->pc_relative
4714 && elf_discarded_section (sec))
4721 name = (bfd_elf_string_from_elf_section
4722 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4726 name = bfd_section_name (input_bfd, sec);
4728 if (! ((*info->callbacks->reloc_overflow)
4729 (info, (h ? &h->root.root : NULL), name, howto->name,
4730 (bfd_vma) 0, input_bfd, input_section,
4737 case bfd_reloc_outofrange:
4745 /* Finish up dynamic symbol handling. We set the contents of various
4746 dynamic sections here. */
4749 elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
4750 struct elf_link_hash_entry *h,
4751 Elf_Internal_Sym *sym)
4753 struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h;
4754 bfd *dynobj = elf_hash_table(info)->dynobj;
4758 /* Fill in the .plt entry for this symbol. */
4759 asection *splt, *sgot, *srel;
4760 Elf_Internal_Rela outrel;
4762 bfd_vma got_addr, plt_addr;
4764 struct alpha_elf_got_entry *gotent;
4766 BFD_ASSERT (h->dynindx != -1);
4768 splt = bfd_get_section_by_name (dynobj, ".plt");
4769 BFD_ASSERT (splt != NULL);
4770 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4771 BFD_ASSERT (srel != NULL);
4773 for (gotent = ah->got_entries; gotent ; gotent = gotent->next)
4774 if (gotent->reloc_type == R_ALPHA_LITERAL
4775 && gotent->use_count > 0)
4780 sgot = alpha_elf_tdata (gotent->gotobj)->got;
4781 BFD_ASSERT (sgot != NULL);
4783 BFD_ASSERT (gotent->got_offset != -1);
4784 BFD_ASSERT (gotent->plt_offset != -1);
4786 got_addr = (sgot->output_section->vma
4787 + sgot->output_offset
4788 + gotent->got_offset);
4789 plt_addr = (splt->output_section->vma
4790 + splt->output_offset
4791 + gotent->plt_offset);
4793 plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
4795 /* Fill in the entry in the procedure linkage table. */
4796 if (elf64_alpha_use_secureplt)
4798 disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4);
4799 insn = INSN_AD (INSN_BR, 31, disp);
4800 bfd_put_32 (output_bfd, insn,
4801 splt->contents + gotent->plt_offset);
4803 plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE)
4804 / NEW_PLT_ENTRY_SIZE);
4808 disp = -(gotent->plt_offset + 4);
4809 insn = INSN_AD (INSN_BR, 28, disp);
4810 bfd_put_32 (output_bfd, insn,
4811 splt->contents + gotent->plt_offset);
4812 bfd_put_32 (output_bfd, INSN_UNOP,
4813 splt->contents + gotent->plt_offset + 4);
4814 bfd_put_32 (output_bfd, INSN_UNOP,
4815 splt->contents + gotent->plt_offset + 8);
4817 plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE)
4818 / OLD_PLT_ENTRY_SIZE);
4821 /* Fill in the entry in the .rela.plt section. */
4822 outrel.r_offset = got_addr;
4823 outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
4824 outrel.r_addend = 0;
4826 loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
4827 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
4829 /* Fill in the entry in the .got. */
4830 bfd_put_64 (output_bfd, plt_addr,
4831 sgot->contents + gotent->got_offset);
4834 else if (alpha_elf_dynamic_symbol_p (h, info))
4836 /* Fill in the dynamic relocations for this symbol's .got entries. */
4838 struct alpha_elf_got_entry *gotent;
4840 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4841 BFD_ASSERT (srel != NULL);
4843 for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
4845 gotent = gotent->next)
4850 if (gotent->use_count == 0)
4853 sgot = alpha_elf_tdata (gotent->gotobj)->got;
4855 r_type = gotent->reloc_type;
4858 case R_ALPHA_LITERAL:
4859 r_type = R_ALPHA_GLOB_DAT;
4862 r_type = R_ALPHA_DTPMOD64;
4864 case R_ALPHA_GOTDTPREL:
4865 r_type = R_ALPHA_DTPREL64;
4867 case R_ALPHA_GOTTPREL:
4868 r_type = R_ALPHA_TPREL64;
4870 case R_ALPHA_TLSLDM:
4875 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4876 gotent->got_offset, h->dynindx,
4877 r_type, gotent->addend);
4879 if (gotent->reloc_type == R_ALPHA_TLSGD)
4880 elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4881 gotent->got_offset + 8, h->dynindx,
4882 R_ALPHA_DTPREL64, gotent->addend);
4886 /* Mark some specially defined symbols as absolute. */
4887 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4888 || h == elf_hash_table (info)->hgot
4889 || h == elf_hash_table (info)->hplt)
4890 sym->st_shndx = SHN_ABS;
4895 /* Finish up the dynamic sections. */
4898 elf64_alpha_finish_dynamic_sections (bfd *output_bfd,
4899 struct bfd_link_info *info)
4904 dynobj = elf_hash_table (info)->dynobj;
4905 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4907 if (elf_hash_table (info)->dynamic_sections_created)
4909 asection *splt, *sgotplt, *srelaplt;
4910 Elf64_External_Dyn *dyncon, *dynconend;
4911 bfd_vma plt_vma, gotplt_vma;
4913 splt = bfd_get_section_by_name (dynobj, ".plt");
4914 srelaplt = bfd_get_section_by_name (output_bfd, ".rela.plt");
4915 BFD_ASSERT (splt != NULL && sdyn != NULL);
4917 plt_vma = splt->output_section->vma + splt->output_offset;
4920 if (elf64_alpha_use_secureplt)
4922 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
4923 BFD_ASSERT (sgotplt != NULL);
4924 if (sgotplt->size > 0)
4925 gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset;
4928 dyncon = (Elf64_External_Dyn *) sdyn->contents;
4929 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
4930 for (; dyncon < dynconend; dyncon++)
4932 Elf_Internal_Dyn dyn;
4934 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
4940 = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma;
4943 dyn.d_un.d_val = srelaplt ? srelaplt->size : 0;
4946 dyn.d_un.d_ptr = srelaplt ? srelaplt->vma : 0;
4950 /* My interpretation of the TIS v1.1 ELF document indicates
4951 that RELASZ should not include JMPREL. This is not what
4952 the rest of the BFD does. It is, however, what the
4953 glibc ld.so wants. Do this fixup here until we found
4954 out who is right. */
4956 dyn.d_un.d_val -= srelaplt->size;
4960 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
4963 /* Initialize the plt header. */
4969 if (elf64_alpha_use_secureplt)
4971 ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE);
4973 insn = INSN_ABC (INSN_SUBQ, 27, 28, 25);
4974 bfd_put_32 (output_bfd, insn, splt->contents);
4976 insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16);
4977 bfd_put_32 (output_bfd, insn, splt->contents + 4);
4979 insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25);
4980 bfd_put_32 (output_bfd, insn, splt->contents + 8);
4982 insn = INSN_ABO (INSN_LDA, 28, 28, ofs);
4983 bfd_put_32 (output_bfd, insn, splt->contents + 12);
4985 insn = INSN_ABO (INSN_LDQ, 27, 28, 0);
4986 bfd_put_32 (output_bfd, insn, splt->contents + 16);
4988 insn = INSN_ABC (INSN_ADDQ, 25, 25, 25);
4989 bfd_put_32 (output_bfd, insn, splt->contents + 20);
4991 insn = INSN_ABO (INSN_LDQ, 28, 28, 8);
4992 bfd_put_32 (output_bfd, insn, splt->contents + 24);
4994 insn = INSN_AB (INSN_JMP, 31, 27);
4995 bfd_put_32 (output_bfd, insn, splt->contents + 28);
4997 insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE);
4998 bfd_put_32 (output_bfd, insn, splt->contents + 32);
5002 insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */
5003 bfd_put_32 (output_bfd, insn, splt->contents);
5005 insn = INSN_ABO (INSN_LDQ, 27, 27, 12);
5006 bfd_put_32 (output_bfd, insn, splt->contents + 4);
5009 bfd_put_32 (output_bfd, insn, splt->contents + 8);
5011 insn = INSN_AB (INSN_JMP, 27, 27);
5012 bfd_put_32 (output_bfd, insn, splt->contents + 12);
5014 /* The next two words will be filled in by ld.so. */
5015 bfd_put_64 (output_bfd, 0, splt->contents + 16);
5016 bfd_put_64 (output_bfd, 0, splt->contents + 24);
5019 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0;
5026 /* We need to use a special link routine to handle the .mdebug section.
5027 We need to merge all instances of these sections together, not write
5028 them all out sequentially. */
5031 elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info)
5034 struct bfd_link_order *p;
5035 asection *mdebug_sec;
5036 struct ecoff_debug_info debug;
5037 const struct ecoff_debug_swap *swap
5038 = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
5039 HDRR *symhdr = &debug.symbolic_header;
5040 void * mdebug_handle = NULL;
5041 struct alpha_elf_link_hash_table * htab;
5043 htab = alpha_elf_hash_table (info);
5047 /* Go through the sections and collect the mdebug information. */
5049 for (o = abfd->sections; o != (asection *) NULL; o = o->next)
5051 if (strcmp (o->name, ".mdebug") == 0)
5053 struct extsym_info einfo;
5055 /* We have found the .mdebug section in the output file.
5056 Look through all the link_orders comprising it and merge
5057 the information together. */
5058 symhdr->magic = swap->sym_magic;
5059 /* FIXME: What should the version stamp be? */
5061 symhdr->ilineMax = 0;
5065 symhdr->isymMax = 0;
5066 symhdr->ioptMax = 0;
5067 symhdr->iauxMax = 0;
5069 symhdr->issExtMax = 0;
5072 symhdr->iextMax = 0;
5074 /* We accumulate the debugging information itself in the
5075 debug_info structure. */
5077 debug.external_dnr = NULL;
5078 debug.external_pdr = NULL;
5079 debug.external_sym = NULL;
5080 debug.external_opt = NULL;
5081 debug.external_aux = NULL;
5083 debug.ssext = debug.ssext_end = NULL;
5084 debug.external_fdr = NULL;
5085 debug.external_rfd = NULL;
5086 debug.external_ext = debug.external_ext_end = NULL;
5088 mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
5089 if (mdebug_handle == (PTR) NULL)
5098 static const char * const name[] =
5100 ".text", ".init", ".fini", ".data",
5101 ".rodata", ".sdata", ".sbss", ".bss"
5103 static const int sc[] = { scText, scInit, scFini, scData,
5104 scRData, scSData, scSBss, scBss };
5107 esym.cobol_main = 0;
5111 esym.asym.iss = issNil;
5112 esym.asym.st = stLocal;
5113 esym.asym.reserved = 0;
5114 esym.asym.index = indexNil;
5115 for (i = 0; i < 8; i++)
5117 esym.asym.sc = sc[i];
5118 s = bfd_get_section_by_name (abfd, name[i]);
5121 esym.asym.value = s->vma;
5122 last = s->vma + s->size;
5125 esym.asym.value = last;
5127 if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
5133 for (p = o->map_head.link_order;
5134 p != (struct bfd_link_order *) NULL;
5137 asection *input_section;
5139 const struct ecoff_debug_swap *input_swap;
5140 struct ecoff_debug_info input_debug;
5144 if (p->type != bfd_indirect_link_order)
5146 if (p->type == bfd_data_link_order)
5151 input_section = p->u.indirect.section;
5152 input_bfd = input_section->owner;
5154 if (! is_alpha_elf (input_bfd))
5155 /* I don't know what a non ALPHA ELF bfd would be
5156 doing with a .mdebug section, but I don't really
5157 want to deal with it. */
5160 input_swap = (get_elf_backend_data (input_bfd)
5161 ->elf_backend_ecoff_debug_swap);
5163 BFD_ASSERT (p->size == input_section->size);
5165 /* The ECOFF linking code expects that we have already
5166 read in the debugging information and set up an
5167 ecoff_debug_info structure, so we do that now. */
5168 if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
5172 if (! (bfd_ecoff_debug_accumulate
5173 (mdebug_handle, abfd, &debug, swap, input_bfd,
5174 &input_debug, input_swap, info)))
5177 /* Loop through the external symbols. For each one with
5178 interesting information, try to find the symbol in
5179 the linker global hash table and save the information
5180 for the output external symbols. */
5181 eraw_src = (char *) input_debug.external_ext;
5182 eraw_end = (eraw_src
5183 + (input_debug.symbolic_header.iextMax
5184 * input_swap->external_ext_size));
5186 eraw_src < eraw_end;
5187 eraw_src += input_swap->external_ext_size)
5191 struct alpha_elf_link_hash_entry *h;
5193 (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
5194 if (ext.asym.sc == scNil
5195 || ext.asym.sc == scUndefined
5196 || ext.asym.sc == scSUndefined)
5199 name = input_debug.ssext + ext.asym.iss;
5200 h = alpha_elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE);
5201 if (h == NULL || h->esym.ifd != -2)
5207 < input_debug.symbolic_header.ifdMax);
5208 ext.ifd = input_debug.ifdmap[ext.ifd];
5214 /* Free up the information we just read. */
5215 free (input_debug.line);
5216 free (input_debug.external_dnr);
5217 free (input_debug.external_pdr);
5218 free (input_debug.external_sym);
5219 free (input_debug.external_opt);
5220 free (input_debug.external_aux);
5221 free (input_debug.ss);
5222 free (input_debug.ssext);
5223 free (input_debug.external_fdr);
5224 free (input_debug.external_rfd);
5225 free (input_debug.external_ext);
5227 /* Hack: reset the SEC_HAS_CONTENTS flag so that
5228 elf_link_input_bfd ignores this section. */
5229 input_section->flags &=~ SEC_HAS_CONTENTS;
5232 /* Build the external symbol information. */
5235 einfo.debug = &debug;
5237 einfo.failed = FALSE;
5238 elf_link_hash_traverse (elf_hash_table (info),
5239 elf64_alpha_output_extsym,
5244 /* Set the size of the .mdebug section. */
5245 o->size = bfd_ecoff_debug_size (abfd, &debug, swap);
5247 /* Skip this section later on (I don't think this currently
5248 matters, but someday it might). */
5249 o->map_head.link_order = (struct bfd_link_order *) NULL;
5255 /* Invoke the regular ELF backend linker to do all the work. */
5256 if (! bfd_elf_final_link (abfd, info))
5259 /* Now write out the computed sections. */
5261 /* The .got subsections... */
5263 bfd *i, *dynobj = elf_hash_table(info)->dynobj;
5264 for (i = htab->got_list;
5266 i = alpha_elf_tdata(i)->got_link_next)
5270 /* elf_bfd_final_link already did everything in dynobj. */
5274 sgot = alpha_elf_tdata(i)->got;
5275 if (! bfd_set_section_contents (abfd, sgot->output_section,
5277 (file_ptr) sgot->output_offset,
5283 if (mdebug_sec != (asection *) NULL)
5285 BFD_ASSERT (abfd->output_has_begun);
5286 if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
5288 mdebug_sec->filepos))
5291 bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
5297 static enum elf_reloc_type_class
5298 elf64_alpha_reloc_type_class (const Elf_Internal_Rela *rela)
5300 switch ((int) ELF64_R_TYPE (rela->r_info))
5302 case R_ALPHA_RELATIVE:
5303 return reloc_class_relative;
5304 case R_ALPHA_JMP_SLOT:
5305 return reloc_class_plt;
5307 return reloc_class_copy;
5309 return reloc_class_normal;
5313 static const struct bfd_elf_special_section elf64_alpha_special_sections[] =
5315 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
5316 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
5317 { NULL, 0, 0, 0, 0 }
5320 /* ECOFF swapping routines. These are used when dealing with the
5321 .mdebug section, which is in the ECOFF debugging format. Copied
5322 from elf32-mips.c. */
5323 static const struct ecoff_debug_swap
5324 elf64_alpha_ecoff_debug_swap =
5326 /* Symbol table magic number. */
5328 /* Alignment of debugging information. E.g., 4. */
5330 /* Sizes of external symbolic information. */
5331 sizeof (struct hdr_ext),
5332 sizeof (struct dnr_ext),
5333 sizeof (struct pdr_ext),
5334 sizeof (struct sym_ext),
5335 sizeof (struct opt_ext),
5336 sizeof (struct fdr_ext),
5337 sizeof (struct rfd_ext),
5338 sizeof (struct ext_ext),
5339 /* Functions to swap in external symbolic data. */
5348 _bfd_ecoff_swap_tir_in,
5349 _bfd_ecoff_swap_rndx_in,
5350 /* Functions to swap out external symbolic data. */
5359 _bfd_ecoff_swap_tir_out,
5360 _bfd_ecoff_swap_rndx_out,
5361 /* Function to read in symbolic data. */
5362 elf64_alpha_read_ecoff_info
5365 /* Use a non-standard hash bucket size of 8. */
5367 static const struct elf_size_info alpha_elf_size_info =
5369 sizeof (Elf64_External_Ehdr),
5370 sizeof (Elf64_External_Phdr),
5371 sizeof (Elf64_External_Shdr),
5372 sizeof (Elf64_External_Rel),
5373 sizeof (Elf64_External_Rela),
5374 sizeof (Elf64_External_Sym),
5375 sizeof (Elf64_External_Dyn),
5376 sizeof (Elf_External_Note),
5380 ELFCLASS64, EV_CURRENT,
5381 bfd_elf64_write_out_phdrs,
5382 bfd_elf64_write_shdrs_and_ehdr,
5383 bfd_elf64_checksum_contents,
5384 bfd_elf64_write_relocs,
5385 bfd_elf64_swap_symbol_in,
5386 bfd_elf64_swap_symbol_out,
5387 bfd_elf64_slurp_reloc_table,
5388 bfd_elf64_slurp_symbol_table,
5389 bfd_elf64_swap_dyn_in,
5390 bfd_elf64_swap_dyn_out,
5391 bfd_elf64_swap_reloc_in,
5392 bfd_elf64_swap_reloc_out,
5393 bfd_elf64_swap_reloca_in,
5394 bfd_elf64_swap_reloca_out
5397 #define TARGET_LITTLE_SYM bfd_elf64_alpha_vec
5398 #define TARGET_LITTLE_NAME "elf64-alpha"
5399 #define ELF_ARCH bfd_arch_alpha
5400 #define ELF_TARGET_ID ALPHA_ELF_DATA
5401 #define ELF_MACHINE_CODE EM_ALPHA
5402 #define ELF_MAXPAGESIZE 0x10000
5403 #define ELF_COMMONPAGESIZE 0x2000
5405 #define bfd_elf64_bfd_link_hash_table_create \
5406 elf64_alpha_bfd_link_hash_table_create
5408 #define bfd_elf64_bfd_reloc_type_lookup \
5409 elf64_alpha_bfd_reloc_type_lookup
5410 #define bfd_elf64_bfd_reloc_name_lookup \
5411 elf64_alpha_bfd_reloc_name_lookup
5412 #define elf_info_to_howto \
5413 elf64_alpha_info_to_howto
5415 #define bfd_elf64_mkobject \
5416 elf64_alpha_mkobject
5417 #define elf_backend_object_p \
5418 elf64_alpha_object_p
5420 #define elf_backend_section_from_shdr \
5421 elf64_alpha_section_from_shdr
5422 #define elf_backend_section_flags \
5423 elf64_alpha_section_flags
5424 #define elf_backend_fake_sections \
5425 elf64_alpha_fake_sections
5427 #define bfd_elf64_bfd_is_local_label_name \
5428 elf64_alpha_is_local_label_name
5429 #define bfd_elf64_find_nearest_line \
5430 elf64_alpha_find_nearest_line
5431 #define bfd_elf64_bfd_relax_section \
5432 elf64_alpha_relax_section
5434 #define elf_backend_add_symbol_hook \
5435 elf64_alpha_add_symbol_hook
5436 #define elf_backend_relocs_compatible \
5437 _bfd_elf_relocs_compatible
5438 #define elf_backend_check_relocs \
5439 elf64_alpha_check_relocs
5440 #define elf_backend_create_dynamic_sections \
5441 elf64_alpha_create_dynamic_sections
5442 #define elf_backend_adjust_dynamic_symbol \
5443 elf64_alpha_adjust_dynamic_symbol
5444 #define elf_backend_merge_symbol_attribute \
5445 elf64_alpha_merge_symbol_attribute
5446 #define elf_backend_copy_indirect_symbol \
5447 elf64_alpha_copy_indirect_symbol
5448 #define elf_backend_always_size_sections \
5449 elf64_alpha_always_size_sections
5450 #define elf_backend_size_dynamic_sections \
5451 elf64_alpha_size_dynamic_sections
5452 #define elf_backend_omit_section_dynsym \
5453 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5454 #define elf_backend_relocate_section \
5455 elf64_alpha_relocate_section
5456 #define elf_backend_finish_dynamic_symbol \
5457 elf64_alpha_finish_dynamic_symbol
5458 #define elf_backend_finish_dynamic_sections \
5459 elf64_alpha_finish_dynamic_sections
5460 #define bfd_elf64_bfd_final_link \
5461 elf64_alpha_final_link
5462 #define elf_backend_reloc_type_class \
5463 elf64_alpha_reloc_type_class
5465 #define elf_backend_can_gc_sections 1
5466 #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
5467 #define elf_backend_gc_sweep_hook elf64_alpha_gc_sweep_hook
5469 #define elf_backend_ecoff_debug_swap \
5470 &elf64_alpha_ecoff_debug_swap
5472 #define elf_backend_size_info \
5475 #define elf_backend_special_sections \
5476 elf64_alpha_special_sections
5478 /* A few constants that determine how the .plt section is set up. */
5479 #define elf_backend_want_got_plt 0
5480 #define elf_backend_plt_readonly 0
5481 #define elf_backend_want_plt_sym 1
5482 #define elf_backend_got_header_size 0
5484 #include "elf64-target.h"
5486 /* FreeBSD support. */
5488 #undef TARGET_LITTLE_SYM
5489 #define TARGET_LITTLE_SYM bfd_elf64_alpha_freebsd_vec
5490 #undef TARGET_LITTLE_NAME
5491 #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
5493 #define ELF_OSABI ELFOSABI_FREEBSD
5495 /* The kernel recognizes executables as valid only if they carry a
5496 "FreeBSD" label in the ELF header. So we put this label on all
5497 executables and (for simplicity) also all other object files. */
5500 elf64_alpha_fbsd_post_process_headers (bfd * abfd,
5501 struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
5503 Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
5505 i_ehdrp = elf_elfheader (abfd);
5507 /* Put an ABI label supported by FreeBSD >= 4.1. */
5508 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
5509 #ifdef OLD_FREEBSD_ABI_LABEL
5510 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5511 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5515 #undef elf_backend_post_process_headers
5516 #define elf_backend_post_process_headers \
5517 elf64_alpha_fbsd_post_process_headers
5520 #define elf64_bed elf64_alpha_fbsd_bed
5522 #include "elf64-target.h"