1 /* BFD back-end for ALPHA Extended-Coff files.
2 Copyright 1993, 1994 Free Software Foundation, Inc.
3 Modified from coff-mips.c by Steve Chamberlain <sac@cygnus.com> and
4 Ian Lance Taylor <ian@cygnus.com>.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 #include "coff/internal.h"
28 #include "coff/symconst.h"
29 #include "coff/ecoff.h"
30 #include "coff/alpha.h"
34 /* Prototypes for static functions. */
36 static const bfd_target *alpha_ecoff_object_p PARAMS ((bfd *));
37 static boolean alpha_ecoff_bad_format_hook PARAMS ((bfd *abfd, PTR filehdr));
38 static PTR alpha_ecoff_mkobject_hook PARAMS ((bfd *, PTR filehdr, PTR aouthdr));
39 static void alpha_ecoff_swap_reloc_in PARAMS ((bfd *, PTR,
40 struct internal_reloc *));
41 static void alpha_ecoff_swap_reloc_out PARAMS ((bfd *,
42 const struct internal_reloc *,
44 static void alpha_adjust_reloc_in PARAMS ((bfd *,
45 const struct internal_reloc *,
47 static void alpha_adjust_reloc_out PARAMS ((bfd *, const arelent *,
48 struct internal_reloc *));
49 static bfd_byte *alpha_ecoff_get_relocated_section_contents
50 PARAMS ((bfd *abfd, struct bfd_link_info *, struct bfd_link_order *,
51 bfd_byte *data, boolean relocateable, asymbol **symbols));
52 static bfd_vma alpha_convert_external_reloc
53 PARAMS ((bfd *, struct bfd_link_info *, bfd *, struct external_reloc *,
54 struct ecoff_link_hash_entry *));
55 static boolean alpha_relocate_section PARAMS ((bfd *, struct bfd_link_info *,
58 static boolean alpha_adjust_headers
59 PARAMS ((bfd *, struct internal_filehdr *, struct internal_aouthdr *));
61 /* ECOFF has COFF sections, but the debugging information is stored in
62 a completely different format. ECOFF targets use some of the
63 swapping routines from coffswap.h, and some of the generic COFF
64 routines in coffgen.c, but, unlike the real COFF targets, do not
65 use coffcode.h itself.
67 Get the generic COFF swapping routines, except for the reloc,
68 symbol, and lineno ones. Give them ecoff names. Define some
69 accessor macros for the large sizes used for Alpha ECOFF. */
71 #define GET_FILEHDR_SYMPTR bfd_h_get_64
72 #define PUT_FILEHDR_SYMPTR bfd_h_put_64
73 #define GET_AOUTHDR_TSIZE bfd_h_get_64
74 #define PUT_AOUTHDR_TSIZE bfd_h_put_64
75 #define GET_AOUTHDR_DSIZE bfd_h_get_64
76 #define PUT_AOUTHDR_DSIZE bfd_h_put_64
77 #define GET_AOUTHDR_BSIZE bfd_h_get_64
78 #define PUT_AOUTHDR_BSIZE bfd_h_put_64
79 #define GET_AOUTHDR_ENTRY bfd_h_get_64
80 #define PUT_AOUTHDR_ENTRY bfd_h_put_64
81 #define GET_AOUTHDR_TEXT_START bfd_h_get_64
82 #define PUT_AOUTHDR_TEXT_START bfd_h_put_64
83 #define GET_AOUTHDR_DATA_START bfd_h_get_64
84 #define PUT_AOUTHDR_DATA_START bfd_h_put_64
85 #define GET_SCNHDR_PADDR bfd_h_get_64
86 #define PUT_SCNHDR_PADDR bfd_h_put_64
87 #define GET_SCNHDR_VADDR bfd_h_get_64
88 #define PUT_SCNHDR_VADDR bfd_h_put_64
89 #define GET_SCNHDR_SIZE bfd_h_get_64
90 #define PUT_SCNHDR_SIZE bfd_h_put_64
91 #define GET_SCNHDR_SCNPTR bfd_h_get_64
92 #define PUT_SCNHDR_SCNPTR bfd_h_put_64
93 #define GET_SCNHDR_RELPTR bfd_h_get_64
94 #define PUT_SCNHDR_RELPTR bfd_h_put_64
95 #define GET_SCNHDR_LNNOPTR bfd_h_get_64
96 #define PUT_SCNHDR_LNNOPTR bfd_h_put_64
100 #define NO_COFF_RELOCS
101 #define NO_COFF_SYMBOLS
102 #define NO_COFF_LINENOS
103 #define coff_swap_filehdr_in alpha_ecoff_swap_filehdr_in
104 #define coff_swap_filehdr_out alpha_ecoff_swap_filehdr_out
105 #define coff_swap_aouthdr_in alpha_ecoff_swap_aouthdr_in
106 #define coff_swap_aouthdr_out alpha_ecoff_swap_aouthdr_out
107 #define coff_swap_scnhdr_in alpha_ecoff_swap_scnhdr_in
108 #define coff_swap_scnhdr_out alpha_ecoff_swap_scnhdr_out
109 #include "coffswap.h"
111 /* Get the ECOFF swapping routines. */
113 #include "ecoffswap.h"
115 /* How to process the various reloc types. */
117 static bfd_reloc_status_type
118 reloc_nil PARAMS ((bfd *, arelent *, asymbol *, PTR,
119 asection *, bfd *, char **));
121 static bfd_reloc_status_type
122 reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
129 char **error_message;
134 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
135 from smaller values. Start with zero, widen, *then* decrement. */
136 #define MINUS_ONE (((bfd_vma)0) - 1)
138 static reloc_howto_type alpha_howto_table[] =
140 /* Reloc type 0 is ignored by itself. However, it appears after a
141 GPDISP reloc to identify the location where the low order 16 bits
142 of the gp register are loaded. */
143 HOWTO (ALPHA_R_IGNORE, /* type */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
147 true, /* pc_relative */
149 complain_overflow_dont, /* complain_on_overflow */
150 reloc_nil, /* special_function */
152 true, /* partial_inplace */
155 true), /* pcrel_offset */
157 /* A 32 bit reference to a symbol. */
158 HOWTO (ALPHA_R_REFLONG, /* type */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
162 false, /* pc_relative */
164 complain_overflow_bitfield, /* complain_on_overflow */
165 0, /* special_function */
166 "REFLONG", /* name */
167 true, /* partial_inplace */
168 0xffffffff, /* src_mask */
169 0xffffffff, /* dst_mask */
170 false), /* pcrel_offset */
172 /* A 64 bit reference to a symbol. */
173 HOWTO (ALPHA_R_REFQUAD, /* type */
175 4, /* size (0 = byte, 1 = short, 2 = long) */
177 false, /* pc_relative */
179 complain_overflow_bitfield, /* complain_on_overflow */
180 0, /* special_function */
181 "REFQUAD", /* name */
182 true, /* partial_inplace */
183 MINUS_ONE, /* src_mask */
184 MINUS_ONE, /* dst_mask */
185 false), /* pcrel_offset */
187 /* A 32 bit GP relative offset. This is just like REFLONG except
188 that when the value is used the value of the gp register will be
190 HOWTO (ALPHA_R_GPREL32, /* type */
192 2, /* size (0 = byte, 1 = short, 2 = long) */
194 false, /* pc_relative */
196 complain_overflow_bitfield, /* complain_on_overflow */
197 0, /* special_function */
198 "GPREL32", /* name */
199 true, /* partial_inplace */
200 0xffffffff, /* src_mask */
201 0xffffffff, /* dst_mask */
202 false), /* pcrel_offset */
204 /* Used for an instruction that refers to memory off the GP
205 register. The offset is 16 bits of the 32 bit instruction. This
206 reloc always seems to be against the .lita section. */
207 HOWTO (ALPHA_R_LITERAL, /* type */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
211 false, /* pc_relative */
213 complain_overflow_signed, /* complain_on_overflow */
214 0, /* special_function */
215 "LITERAL", /* name */
216 true, /* partial_inplace */
217 0xffff, /* src_mask */
218 0xffff, /* dst_mask */
219 false), /* pcrel_offset */
221 /* This reloc only appears immediately following a LITERAL reloc.
222 It identifies a use of the literal. It seems that the linker can
223 use this to eliminate a portion of the .lita section. The symbol
224 index is special: 1 means the literal address is in the base
225 register of a memory format instruction; 2 means the literal
226 address is in the byte offset register of a byte-manipulation
227 instruction; 3 means the literal address is in the target
228 register of a jsr instruction. This does not actually do any
230 HOWTO (ALPHA_R_LITUSE, /* type */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
234 false, /* pc_relative */
236 complain_overflow_dont, /* complain_on_overflow */
237 reloc_nil, /* special_function */
239 false, /* partial_inplace */
242 false), /* pcrel_offset */
244 /* Load the gp register. This is always used for a ldah instruction
245 which loads the upper 16 bits of the gp register. The next reloc
246 will be an IGNORE reloc which identifies the location of the lda
247 instruction which loads the lower 16 bits. The symbol index of
248 the GPDISP instruction appears to actually be the number of bytes
249 between the ldah and lda instructions. This gives two different
250 ways to determine where the lda instruction is; I don't know why
251 both are used. The value to use for the relocation is the
252 difference between the GP value and the current location; the
253 load will always be done against a register holding the current
255 HOWTO (ALPHA_R_GPDISP, /* type */
257 2, /* size (0 = byte, 1 = short, 2 = long) */
259 true, /* pc_relative */
261 complain_overflow_dont, /* complain_on_overflow */
262 reloc_nil, /* special_function */
264 true, /* partial_inplace */
265 0xffff, /* src_mask */
266 0xffff, /* dst_mask */
267 true), /* pcrel_offset */
269 /* A 21 bit branch. The native assembler generates these for
270 branches within the text segment, and also fills in the PC
271 relative offset in the instruction. */
272 HOWTO (ALPHA_R_BRADDR, /* type */
274 2, /* size (0 = byte, 1 = short, 2 = long) */
276 true, /* pc_relative */
278 complain_overflow_signed, /* complain_on_overflow */
279 0, /* special_function */
281 true, /* partial_inplace */
282 0x1fffff, /* src_mask */
283 0x1fffff, /* dst_mask */
284 false), /* pcrel_offset */
286 /* A hint for a jump to a register. */
287 HOWTO (ALPHA_R_HINT, /* type */
289 2, /* size (0 = byte, 1 = short, 2 = long) */
291 true, /* pc_relative */
293 complain_overflow_dont, /* complain_on_overflow */
294 0, /* special_function */
296 true, /* partial_inplace */
297 0x3fff, /* src_mask */
298 0x3fff, /* dst_mask */
299 false), /* pcrel_offset */
301 /* 16 bit PC relative offset. */
302 HOWTO (ALPHA_R_SREL16, /* type */
304 1, /* size (0 = byte, 1 = short, 2 = long) */
306 true, /* pc_relative */
308 complain_overflow_signed, /* complain_on_overflow */
309 0, /* special_function */
311 true, /* partial_inplace */
312 0xffff, /* src_mask */
313 0xffff, /* dst_mask */
314 false), /* pcrel_offset */
316 /* 32 bit PC relative offset. */
317 HOWTO (ALPHA_R_SREL32, /* type */
319 2, /* size (0 = byte, 1 = short, 2 = long) */
321 true, /* pc_relative */
323 complain_overflow_signed, /* complain_on_overflow */
324 0, /* special_function */
326 true, /* partial_inplace */
327 0xffffffff, /* src_mask */
328 0xffffffff, /* dst_mask */
329 false), /* pcrel_offset */
331 /* A 64 bit PC relative offset. */
332 HOWTO (ALPHA_R_SREL64, /* type */
334 4, /* size (0 = byte, 1 = short, 2 = long) */
336 true, /* pc_relative */
338 complain_overflow_signed, /* complain_on_overflow */
339 0, /* special_function */
341 true, /* partial_inplace */
342 MINUS_ONE, /* src_mask */
343 MINUS_ONE, /* dst_mask */
344 false), /* pcrel_offset */
346 /* Push a value on the reloc evaluation stack. */
347 HOWTO (ALPHA_R_OP_PUSH, /* type */
349 0, /* size (0 = byte, 1 = short, 2 = long) */
351 false, /* pc_relative */
353 complain_overflow_dont, /* complain_on_overflow */
354 0, /* special_function */
355 "OP_PUSH", /* name */
356 false, /* partial_inplace */
359 false), /* pcrel_offset */
361 /* Store the value from the stack at the given address. Store it in
362 a bitfield of size r_size starting at bit position r_offset. */
363 HOWTO (ALPHA_R_OP_STORE, /* type */
365 4, /* size (0 = byte, 1 = short, 2 = long) */
367 false, /* pc_relative */
369 complain_overflow_dont, /* complain_on_overflow */
370 0, /* special_function */
371 "OP_STORE", /* name */
372 false, /* partial_inplace */
374 MINUS_ONE, /* dst_mask */
375 false), /* pcrel_offset */
377 /* Subtract the reloc address from the value on the top of the
379 HOWTO (ALPHA_R_OP_PSUB, /* type */
381 0, /* size (0 = byte, 1 = short, 2 = long) */
383 false, /* pc_relative */
385 complain_overflow_dont, /* complain_on_overflow */
386 0, /* special_function */
387 "OP_PSUB", /* name */
388 false, /* partial_inplace */
391 false), /* pcrel_offset */
393 /* Shift the value on the top of the relocation stack right by the
395 HOWTO (ALPHA_R_OP_PRSHIFT, /* type */
397 0, /* size (0 = byte, 1 = short, 2 = long) */
399 false, /* pc_relative */
401 complain_overflow_dont, /* complain_on_overflow */
402 0, /* special_function */
403 "OP_PRSHIFT", /* name */
404 false, /* partial_inplace */
407 false), /* pcrel_offset */
409 /* Adjust the GP value for a new range in the object file. */
410 HOWTO (ALPHA_R_GPVALUE, /* type */
412 0, /* size (0 = byte, 1 = short, 2 = long) */
414 false, /* pc_relative */
416 complain_overflow_dont, /* complain_on_overflow */
417 0, /* special_function */
418 "GPVALUE", /* name */
419 false, /* partial_inplace */
422 false) /* pcrel_offset */
425 /* Recognize an Alpha ECOFF file. */
427 static const bfd_target *
428 alpha_ecoff_object_p (abfd)
431 static const bfd_target *ret;
433 ret = coff_object_p (abfd);
439 /* Alpha ECOFF has a .pdata section. The lnnoptr field of the
440 .pdata section is the number of entries it contains. Each
441 entry takes up 8 bytes. The number of entries is required
442 since the section is aligned to a 16 byte boundary. When we
443 link .pdata sections together, we do not want to include the
444 alignment bytes. We handle this on input by faking the size
445 of the .pdata section to remove the unwanted alignment bytes.
446 On output we will set the lnnoptr field and force the
448 sec = bfd_get_section_by_name (abfd, _PDATA);
449 if (sec != (asection *) NULL)
453 size = sec->line_filepos * 8;
454 BFD_ASSERT (size == bfd_section_size (abfd, sec)
455 || size + 8 == bfd_section_size (abfd, sec));
456 if (! bfd_set_section_size (abfd, sec, size))
464 /* See whether the magic number matches. */
467 alpha_ecoff_bad_format_hook (abfd, filehdr)
471 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
473 if (ALPHA_ECOFF_BADMAG (*internal_f))
479 /* This is a hook called by coff_real_object_p to create any backend
480 specific information. */
483 alpha_ecoff_mkobject_hook (abfd, filehdr, aouthdr)
490 ecoff = _bfd_ecoff_mkobject_hook (abfd, filehdr, aouthdr);
494 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
496 /* Set additional BFD flags according to the object type from the
497 machine specific file header flags. */
498 switch (internal_f->f_flags & F_ALPHA_OBJECT_TYPE_MASK)
500 case F_ALPHA_SHARABLE:
501 abfd->flags |= DYNAMIC;
503 case F_ALPHA_CALL_SHARED:
504 /* Always executable if using shared libraries as the run time
505 loader might resolve undefined references. */
506 abfd->flags |= (DYNAMIC | EXEC_P);
513 /* Reloc handling. */
515 /* Swap a reloc in. */
518 alpha_ecoff_swap_reloc_in (abfd, ext_ptr, intern)
521 struct internal_reloc *intern;
523 const RELOC *ext = (RELOC *) ext_ptr;
525 intern->r_vaddr = bfd_h_get_64 (abfd, (bfd_byte *) ext->r_vaddr);
526 intern->r_symndx = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_symndx);
528 BFD_ASSERT (abfd->xvec->header_byteorder_big_p == false);
530 intern->r_type = ((ext->r_bits[0] & RELOC_BITS0_TYPE_LITTLE)
531 >> RELOC_BITS0_TYPE_SH_LITTLE);
532 intern->r_extern = (ext->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0;
533 intern->r_offset = ((ext->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE)
534 >> RELOC_BITS1_OFFSET_SH_LITTLE);
535 /* Ignored the reserved bits. */
536 intern->r_size = ((ext->r_bits[3] & RELOC_BITS3_SIZE_LITTLE)
537 >> RELOC_BITS3_SIZE_SH_LITTLE);
539 if (intern->r_type == ALPHA_R_LITUSE
540 || intern->r_type == ALPHA_R_GPDISP)
542 /* Handle the LITUSE and GPDISP relocs specially. Its symndx
543 value is not actually a symbol index, but is instead a
544 special code. We put the code in the r_size field, and
545 clobber the symndx. */
546 if (intern->r_size != 0)
548 intern->r_size = intern->r_symndx;
549 intern->r_symndx = RELOC_SECTION_NONE;
551 else if (intern->r_type == ALPHA_R_IGNORE)
553 /* The IGNORE reloc generally follows a GPDISP reloc, and is
554 against the .lita section. The section is irrelevant. */
555 if (! intern->r_extern &&
556 (intern->r_symndx == RELOC_SECTION_NONE
557 || intern->r_symndx == RELOC_SECTION_ABS))
559 if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA)
560 intern->r_symndx = RELOC_SECTION_NONE;
564 /* Swap a reloc out. */
567 alpha_ecoff_swap_reloc_out (abfd, intern, dst)
569 const struct internal_reloc *intern;
572 RELOC *ext = (RELOC *) dst;
576 /* Undo the hackery done in swap_reloc_in. */
577 if (intern->r_type == ALPHA_R_LITUSE
578 || intern->r_type == ALPHA_R_GPDISP)
580 symndx = intern->r_size;
583 else if (intern->r_type == ALPHA_R_IGNORE
584 && ! intern->r_extern
585 && intern->r_symndx == RELOC_SECTION_NONE)
587 symndx = RELOC_SECTION_LITA;
588 size = intern->r_size;
592 symndx = intern->r_symndx;
593 size = intern->r_size;
596 BFD_ASSERT (intern->r_extern
597 || (intern->r_symndx >= 0 && intern->r_symndx <= 14));
599 bfd_h_put_64 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr);
600 bfd_h_put_32 (abfd, symndx, (bfd_byte *) ext->r_symndx);
602 BFD_ASSERT (abfd->xvec->header_byteorder_big_p == false);
604 ext->r_bits[0] = ((intern->r_type << RELOC_BITS0_TYPE_SH_LITTLE)
605 & RELOC_BITS0_TYPE_LITTLE);
606 ext->r_bits[1] = ((intern->r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0)
607 | ((intern->r_offset << RELOC_BITS1_OFFSET_SH_LITTLE)
608 & RELOC_BITS1_OFFSET_LITTLE));
610 ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE)
611 & RELOC_BITS3_SIZE_LITTLE);
614 /* Finish canonicalizing a reloc. Part of this is generic to all
615 ECOFF targets, and that part is in ecoff.c. The rest is done in
616 this backend routine. It must fill in the howto field. */
619 alpha_adjust_reloc_in (abfd, intern, rptr)
621 const struct internal_reloc *intern;
624 if (intern->r_type > ALPHA_R_GPVALUE)
627 switch (intern->r_type)
633 /* The PC relative relocs do not seem to use the section VMA as
634 a negative addend. */
638 case ALPHA_R_GPREL32:
639 case ALPHA_R_LITERAL:
640 /* Copy the gp value for this object file into the addend, to
641 ensure that we are not confused by the linker. */
642 if (! intern->r_extern)
643 rptr->addend += ecoff_data (abfd)->gp;
648 /* The LITUSE and GPDISP relocs do not use a symbol, or an
649 addend, but they do use a special code. Put this code in the
651 rptr->addend = intern->r_size;
654 case ALPHA_R_OP_STORE:
655 /* The STORE reloc needs the size and offset fields. We store
656 them in the addend. */
657 BFD_ASSERT (intern->r_offset <= 256 && intern->r_size <= 256);
658 rptr->addend = (intern->r_offset << 8) + intern->r_size;
661 case ALPHA_R_OP_PUSH:
662 case ALPHA_R_OP_PSUB:
663 case ALPHA_R_OP_PRSHIFT:
664 /* The PUSH, PSUB and PRSHIFT relocs do not actually use an
665 address. I believe that the address supplied is really an
667 rptr->addend = intern->r_vaddr;
670 case ALPHA_R_GPVALUE:
671 /* Set the addend field to the new GP value. */
672 rptr->addend = intern->r_symndx + ecoff_data (abfd)->gp;
676 /* If the type is ALPHA_R_IGNORE, make sure this is a reference
677 to the absolute section so that the reloc is ignored. For
678 some reason the address of this reloc type is not adjusted by
679 the section vma. We record the gp value for this object file
680 here, for convenience when doing the GPDISP relocation. */
681 rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
682 rptr->address = intern->r_vaddr;
683 rptr->addend = ecoff_data (abfd)->gp;
690 rptr->howto = &alpha_howto_table[intern->r_type];
693 /* When writing out a reloc we need to pull some values back out of
694 the addend field into the reloc. This is roughly the reverse of
695 alpha_adjust_reloc_in, except that there are several changes we do
699 alpha_adjust_reloc_out (abfd, rel, intern)
702 struct internal_reloc *intern;
704 switch (intern->r_type)
708 intern->r_size = rel->addend;
711 case ALPHA_R_OP_STORE:
712 intern->r_size = rel->addend & 0xff;
713 intern->r_offset = (rel->addend >> 8) & 0xff;
716 case ALPHA_R_OP_PUSH:
717 case ALPHA_R_OP_PSUB:
718 case ALPHA_R_OP_PRSHIFT:
719 intern->r_vaddr = rel->addend;
723 intern->r_vaddr = rel->address;
724 if (intern->r_symndx == RELOC_SECTION_ABS)
725 intern->r_symndx = RELOC_SECTION_NONE;
733 /* The size of the stack for the relocation evaluator. */
734 #define RELOC_STACKSIZE (10)
736 /* Alpha ECOFF relocs have a built in expression evaluator as well as
737 other interdependencies. Rather than use a bunch of special
738 functions and global variables, we use a single routine to do all
739 the relocation for a section. I haven't yet worked out how the
740 assembler is going to handle this. */
743 alpha_ecoff_get_relocated_section_contents (abfd, link_info, link_order,
744 data, relocateable, symbols)
746 struct bfd_link_info *link_info;
747 struct bfd_link_order *link_order;
749 boolean relocateable;
752 bfd *input_bfd = link_order->u.indirect.section->owner;
753 asection *input_section = link_order->u.indirect.section;
754 long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
755 arelent **reloc_vector = NULL;
757 bfd *output_bfd = relocateable ? abfd : (bfd *) NULL;
759 boolean gp_undefined;
760 bfd_vma stack[RELOC_STACKSIZE];
765 reloc_vector = (arelent **) malloc (reloc_size);
766 if (reloc_vector == NULL && reloc_size != 0)
768 bfd_set_error (bfd_error_no_memory);
772 if (! bfd_get_section_contents (input_bfd, input_section, data,
773 (file_ptr) 0, input_section->_raw_size))
776 /* The section size is not going to change. */
777 input_section->_cooked_size = input_section->_raw_size;
778 input_section->reloc_done = true;
780 reloc_count = bfd_canonicalize_reloc (input_bfd, input_section,
781 reloc_vector, symbols);
784 if (reloc_count == 0)
785 goto successful_return;
787 /* Get the GP value for the output BFD. */
788 gp_undefined = false;
789 if (ecoff_data (abfd)->gp == 0)
791 if (relocateable != false)
796 /* Make up a value. */
798 for (sec = abfd->sections; sec != NULL; sec = sec->next)
801 && (strcmp (sec->name, ".sbss") == 0
802 || strcmp (sec->name, ".sdata") == 0
803 || strcmp (sec->name, ".lit4") == 0
804 || strcmp (sec->name, ".lit8") == 0
805 || strcmp (sec->name, ".lita") == 0))
808 ecoff_data (abfd)->gp = lo + 0x8000;
812 struct bfd_link_hash_entry *h;
814 h = bfd_link_hash_lookup (link_info->hash, "_gp", false, false,
816 if (h == (struct bfd_link_hash_entry *) NULL
817 || h->type != bfd_link_hash_defined)
820 ecoff_data (abfd)->gp = (h->u.def.value
821 + h->u.def.section->output_section->vma
822 + h->u.def.section->output_offset);
825 gp = ecoff_data (abfd)->gp;
827 for (; *reloc_vector != (arelent *) NULL; reloc_vector++)
830 bfd_reloc_status_type r;
835 switch (rel->howto->type)
838 rel->address += input_section->output_offset;
841 case ALPHA_R_REFLONG:
842 case ALPHA_R_REFQUAD:
849 && ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
851 rel->address += input_section->output_offset;
854 r = bfd_perform_relocation (input_bfd, rel, data, input_section,
858 case ALPHA_R_GPREL32:
859 /* This relocation is used in a switch table. It is a 32
860 bit offset from the current GP value. We must adjust it
861 by the different between the original GP value and the
862 current GP value. The original GP value is stored in the
863 addend. We adjust the addend and let
864 bfd_perform_relocation finish the job. */
866 r = bfd_perform_relocation (input_bfd, rel, data, input_section,
868 if (r == bfd_reloc_ok && gp_undefined)
870 r = bfd_reloc_dangerous;
871 err = (char *) "GP relative relocation used when GP not defined";
875 case ALPHA_R_LITERAL:
876 /* This is a reference to a literal value, generally
877 (always?) in the .lita section. This is a 16 bit GP
878 relative relocation. Sometimes the subsequent reloc is a
879 LITUSE reloc, which indicates how this reloc is used.
880 This sometimes permits rewriting the two instructions
881 referred to by the LITERAL and the LITUSE into different
882 instructions which do not refer to .lita. This can save
883 a memory reference, and permits removing a value from
884 .lita thus saving GP relative space.
886 We do not these optimizations. To do them we would need
887 to arrange to link the .lita section first, so that by
888 the time we got here we would know the final values to
889 use. This would not be particularly difficult, but it is
890 not currently implemented. */
895 /* I believe that the LITERAL reloc will only apply to a
896 ldq or ldl instruction, so check my assumption. */
897 insn = bfd_get_32 (input_bfd, data + rel->address);
898 BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29
899 || ((insn >> 26) & 0x3f) == 0x28);
902 r = bfd_perform_relocation (input_bfd, rel, data, input_section,
904 if (r == bfd_reloc_ok && gp_undefined)
906 r = bfd_reloc_dangerous;
908 (char *) "GP relative relocation used when GP not defined";
914 /* See ALPHA_R_LITERAL above for the uses of this reloc. It
915 does not cause anything to happen, itself. */
916 rel->address += input_section->output_offset;
920 /* This marks the ldah of an ldah/lda pair which loads the
921 gp register with the difference of the gp value and the
922 current location. The second of the pair is r_size bytes
923 ahead, and is marked with an ALPHA_R_IGNORE reloc. */
925 unsigned long insn1, insn2;
928 BFD_ASSERT (reloc_vector[1] != NULL
929 && reloc_vector[1]->howto->type == ALPHA_R_IGNORE
930 && (rel->address + rel->addend
931 == reloc_vector[1]->address));
933 /* Get the two instructions. */
934 insn1 = bfd_get_32 (input_bfd, data + rel->address);
935 insn2 = bfd_get_32 (input_bfd, data + rel->address + rel->addend);
937 BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */
938 BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */
940 /* Get the existing addend. We must account for the sign
941 extension done by lda and ldah. */
942 addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff);
945 addend -= 0x80000000;
946 addend -= 0x80000000;
951 /* The existing addend includes the different between the
952 gp of the input BFD and the address in the input BFD.
953 Subtract this out. */
954 addend -= (reloc_vector[1]->addend
955 - (input_section->vma + rel->address));
957 /* Now add in the final gp value, and subtract out the
960 - (input_section->output_section->vma
961 + input_section->output_offset
964 /* Change the instructions, accounting for the sign
965 extension, and write them out. */
968 insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff);
969 insn2 = (insn2 & 0xffff0000) | (addend & 0xffff);
971 bfd_put_32 (input_bfd, (bfd_vma) insn1, data + rel->address);
972 bfd_put_32 (input_bfd, (bfd_vma) insn2,
973 data + rel->address + rel->addend);
975 rel->address += input_section->output_offset;
979 case ALPHA_R_OP_PUSH:
980 /* Push a value on the reloc evaluation stack. */
987 rel->address += input_section->output_offset;
991 /* Figure out the relocation of this symbol. */
992 symbol = *rel->sym_ptr_ptr;
994 if (bfd_is_und_section (symbol->section))
995 r = bfd_reloc_undefined;
997 if (bfd_is_com_section (symbol->section))
1000 relocation = symbol->value;
1001 relocation += symbol->section->output_section->vma;
1002 relocation += symbol->section->output_offset;
1003 relocation += rel->addend;
1005 if (tos >= RELOC_STACKSIZE)
1008 stack[tos++] = relocation;
1012 case ALPHA_R_OP_STORE:
1013 /* Store a value from the reloc stack into a bitfield. */
1020 rel->address += input_section->output_offset;
1027 /* The offset and size for this reloc are encoded into the
1028 addend field by alpha_adjust_reloc_in. */
1029 offset = (rel->addend >> 8) & 0xff;
1030 size = rel->addend & 0xff;
1032 val = bfd_get_64 (abfd, data + rel->address);
1033 val &=~ (((1 << size) - 1) << offset);
1034 val |= (stack[--tos] & ((1 << size) - 1)) << offset;
1035 bfd_put_64 (abfd, val, data + rel->address);
1039 case ALPHA_R_OP_PSUB:
1040 /* Subtract a value from the top of the stack. */
1047 rel->address += input_section->output_offset;
1051 /* Figure out the relocation of this symbol. */
1052 symbol = *rel->sym_ptr_ptr;
1054 if (bfd_is_und_section (symbol->section))
1055 r = bfd_reloc_undefined;
1057 if (bfd_is_com_section (symbol->section))
1060 relocation = symbol->value;
1061 relocation += symbol->section->output_section->vma;
1062 relocation += symbol->section->output_offset;
1063 relocation += rel->addend;
1068 stack[tos - 1] -= relocation;
1072 case ALPHA_R_OP_PRSHIFT:
1073 /* Shift the value on the top of the stack. */
1080 rel->address += input_section->output_offset;
1084 /* Figure out the relocation of this symbol. */
1085 symbol = *rel->sym_ptr_ptr;
1087 if (bfd_is_und_section (symbol->section))
1088 r = bfd_reloc_undefined;
1090 if (bfd_is_com_section (symbol->section))
1093 relocation = symbol->value;
1094 relocation += symbol->section->output_section->vma;
1095 relocation += symbol->section->output_offset;
1096 relocation += rel->addend;
1101 stack[tos - 1] >>= relocation;
1105 case ALPHA_R_GPVALUE:
1106 /* I really don't know if this does the right thing. */
1108 gp_undefined = false;
1117 asection *os = input_section->output_section;
1119 /* A partial link, so keep the relocs. */
1120 os->orelocation[os->reloc_count] = rel;
1124 if (r != bfd_reloc_ok)
1128 case bfd_reloc_undefined:
1129 if (! ((*link_info->callbacks->undefined_symbol)
1130 (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr),
1131 input_bfd, input_section, rel->address)))
1134 case bfd_reloc_dangerous:
1135 if (! ((*link_info->callbacks->reloc_dangerous)
1136 (link_info, err, input_bfd, input_section,
1140 case bfd_reloc_overflow:
1141 if (! ((*link_info->callbacks->reloc_overflow)
1142 (link_info, bfd_asymbol_name (*rel->sym_ptr_ptr),
1143 rel->howto->name, rel->addend, input_bfd,
1144 input_section, rel->address)))
1147 case bfd_reloc_outofrange:
1159 if (reloc_vector != NULL)
1160 free (reloc_vector);
1164 if (reloc_vector != NULL)
1165 free (reloc_vector);
1169 /* Get the howto structure for a generic reloc type. */
1171 static reloc_howto_type *
1172 alpha_bfd_reloc_type_lookup (abfd, code)
1174 bfd_reloc_code_real_type code;
1181 alpha_type = ALPHA_R_REFLONG;
1184 case BFD_RELOC_CTOR:
1185 alpha_type = ALPHA_R_REFQUAD;
1187 case BFD_RELOC_GPREL32:
1188 alpha_type = ALPHA_R_GPREL32;
1190 case BFD_RELOC_ALPHA_LITERAL:
1191 alpha_type = ALPHA_R_LITERAL;
1193 case BFD_RELOC_ALPHA_LITUSE:
1194 alpha_type = ALPHA_R_LITUSE;
1196 case BFD_RELOC_ALPHA_GPDISP_HI16:
1197 alpha_type = ALPHA_R_GPDISP;
1199 case BFD_RELOC_ALPHA_GPDISP_LO16:
1200 alpha_type = ALPHA_R_IGNORE;
1202 case BFD_RELOC_23_PCREL_S2:
1203 alpha_type = ALPHA_R_BRADDR;
1205 case BFD_RELOC_ALPHA_HINT:
1206 alpha_type = ALPHA_R_HINT;
1208 case BFD_RELOC_16_PCREL:
1209 alpha_type = ALPHA_R_SREL16;
1211 case BFD_RELOC_32_PCREL:
1212 alpha_type = ALPHA_R_SREL32;
1214 case BFD_RELOC_64_PCREL:
1215 alpha_type = ALPHA_R_SREL64;
1219 alpha_type = ALPHA_R_OP_PUSH;
1222 alpha_type = ALPHA_R_OP_STORE;
1225 alpha_type = ALPHA_R_OP_PSUB;
1228 alpha_type = ALPHA_R_OP_PRSHIFT;
1231 alpha_type = ALPHA_R_GPVALUE;
1235 return (reloc_howto_type *) NULL;
1238 return &alpha_howto_table[alpha_type];
1241 /* A helper routine for alpha_relocate_section which converts an
1242 external reloc when generating relocateable output. Returns the
1243 relocation amount. */
1246 alpha_convert_external_reloc (output_bfd, info, input_bfd, ext_rel, h)
1248 struct bfd_link_info *info;
1250 struct external_reloc *ext_rel;
1251 struct ecoff_link_hash_entry *h;
1253 unsigned long r_symndx;
1256 BFD_ASSERT (info->relocateable);
1258 if (h->root.type == bfd_link_hash_defined
1259 || h->root.type == bfd_link_hash_defweak)
1264 /* This symbol is defined in the output. Convert the reloc from
1265 being against the symbol to being against the section. */
1267 /* Clear the r_extern bit. */
1268 ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE;
1270 /* Compute a new r_symndx value. */
1271 hsec = h->root.u.def.section;
1272 name = bfd_get_section_name (output_bfd, hsec->output_section);
1278 if (strcmp (name, "*ABS*") == 0)
1279 r_symndx = RELOC_SECTION_ABS;
1282 if (strcmp (name, ".bss") == 0)
1283 r_symndx = RELOC_SECTION_BSS;
1286 if (strcmp (name, ".data") == 0)
1287 r_symndx = RELOC_SECTION_DATA;
1290 if (strcmp (name, ".fini") == 0)
1291 r_symndx = RELOC_SECTION_FINI;
1294 if (strcmp (name, ".init") == 0)
1295 r_symndx = RELOC_SECTION_INIT;
1298 if (strcmp (name, ".lita") == 0)
1299 r_symndx = RELOC_SECTION_LITA;
1300 else if (strcmp (name, ".lit8") == 0)
1301 r_symndx = RELOC_SECTION_LIT8;
1302 else if (strcmp (name, ".lit4") == 0)
1303 r_symndx = RELOC_SECTION_LIT4;
1306 if (strcmp (name, ".pdata") == 0)
1307 r_symndx = RELOC_SECTION_PDATA;
1310 if (strcmp (name, ".rdata") == 0)
1311 r_symndx = RELOC_SECTION_RDATA;
1314 if (strcmp (name, ".sdata") == 0)
1315 r_symndx = RELOC_SECTION_SDATA;
1316 else if (strcmp (name, ".sbss") == 0)
1317 r_symndx = RELOC_SECTION_SBSS;
1320 if (strcmp (name, ".text") == 0)
1321 r_symndx = RELOC_SECTION_TEXT;
1324 if (strcmp (name, ".xdata") == 0)
1325 r_symndx = RELOC_SECTION_XDATA;
1332 /* Add the section VMA and the symbol value. */
1333 relocation = (h->root.u.def.value
1334 + hsec->output_section->vma
1335 + hsec->output_offset);
1339 /* Change the symndx value to the right one for
1344 /* Caller must give an error. */
1350 /* Write out the new r_symndx value. */
1351 bfd_h_put_32 (input_bfd, (bfd_vma) r_symndx,
1352 (bfd_byte *) ext_rel->r_symndx);
1357 /* Relocate a section while linking an Alpha ECOFF file. This is
1358 quite similar to get_relocated_section_contents. Perhaps they
1359 could be combined somehow. */
1362 alpha_relocate_section (output_bfd, info, input_bfd, input_section,
1363 contents, external_relocs)
1365 struct bfd_link_info *info;
1367 asection *input_section;
1369 PTR external_relocs;
1371 asection **symndx_to_section;
1372 struct ecoff_link_hash_entry **sym_hashes;
1374 boolean gp_undefined;
1375 bfd_vma stack[RELOC_STACKSIZE];
1377 struct external_reloc *ext_rel;
1378 struct external_reloc *ext_rel_end;
1380 /* We keep a table mapping the symndx found in an internal reloc to
1381 the appropriate section. This is faster than looking up the
1382 section by name each time. */
1383 symndx_to_section = ecoff_data (input_bfd)->symndx_to_section;
1384 if (symndx_to_section == (asection **) NULL)
1386 symndx_to_section = ((asection **)
1387 bfd_alloc (input_bfd,
1389 * sizeof (asection *))));
1390 if (!symndx_to_section)
1392 bfd_set_error (bfd_error_no_memory);
1396 symndx_to_section[RELOC_SECTION_NONE] = NULL;
1397 symndx_to_section[RELOC_SECTION_TEXT] =
1398 bfd_get_section_by_name (input_bfd, ".text");
1399 symndx_to_section[RELOC_SECTION_RDATA] =
1400 bfd_get_section_by_name (input_bfd, ".rdata");
1401 symndx_to_section[RELOC_SECTION_DATA] =
1402 bfd_get_section_by_name (input_bfd, ".data");
1403 symndx_to_section[RELOC_SECTION_SDATA] =
1404 bfd_get_section_by_name (input_bfd, ".sdata");
1405 symndx_to_section[RELOC_SECTION_SBSS] =
1406 bfd_get_section_by_name (input_bfd, ".sbss");
1407 symndx_to_section[RELOC_SECTION_BSS] =
1408 bfd_get_section_by_name (input_bfd, ".bss");
1409 symndx_to_section[RELOC_SECTION_INIT] =
1410 bfd_get_section_by_name (input_bfd, ".init");
1411 symndx_to_section[RELOC_SECTION_LIT8] =
1412 bfd_get_section_by_name (input_bfd, ".lit8");
1413 symndx_to_section[RELOC_SECTION_LIT4] =
1414 bfd_get_section_by_name (input_bfd, ".lit4");
1415 symndx_to_section[RELOC_SECTION_XDATA] =
1416 bfd_get_section_by_name (input_bfd, ".xdata");
1417 symndx_to_section[RELOC_SECTION_PDATA] =
1418 bfd_get_section_by_name (input_bfd, ".pdata");
1419 symndx_to_section[RELOC_SECTION_FINI] =
1420 bfd_get_section_by_name (input_bfd, ".fini");
1421 symndx_to_section[RELOC_SECTION_LITA] =
1422 bfd_get_section_by_name (input_bfd, ".lita");
1423 symndx_to_section[RELOC_SECTION_ABS] = bfd_abs_section_ptr;
1425 ecoff_data (input_bfd)->symndx_to_section = symndx_to_section;
1428 sym_hashes = ecoff_data (input_bfd)->sym_hashes;
1430 gp = ecoff_data (output_bfd)->gp;
1432 gp_undefined = true;
1434 gp_undefined = false;
1436 BFD_ASSERT (output_bfd->xvec->header_byteorder_big_p == false);
1437 BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p == false);
1439 ext_rel = (struct external_reloc *) external_relocs;
1440 ext_rel_end = ext_rel + input_section->reloc_count;
1441 for (; ext_rel < ext_rel_end; ext_rel++)
1444 unsigned long r_symndx;
1450 boolean adjust_addrp;
1454 r_vaddr = bfd_h_get_64 (input_bfd, (bfd_byte *) ext_rel->r_vaddr);
1455 r_symndx = bfd_h_get_32 (input_bfd, (bfd_byte *) ext_rel->r_symndx);
1457 r_type = ((ext_rel->r_bits[0] & RELOC_BITS0_TYPE_LITTLE)
1458 >> RELOC_BITS0_TYPE_SH_LITTLE);
1459 r_extern = (ext_rel->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0;
1460 r_offset = ((ext_rel->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE)
1461 >> RELOC_BITS1_OFFSET_SH_LITTLE);
1462 /* Ignored the reserved bits. */
1463 r_size = ((ext_rel->r_bits[3] & RELOC_BITS3_SIZE_LITTLE)
1464 >> RELOC_BITS3_SIZE_SH_LITTLE);
1467 adjust_addrp = true;
1476 case ALPHA_R_IGNORE:
1477 /* This reloc appears after a GPDISP reloc. It marks the
1478 position of the second instruction to be altered by the
1479 GPDISP reloc, but is not otherwise used for anything.
1480 For some reason, the address of the relocation does not
1481 appear to include the section VMA, unlike the other
1482 relocation types. */
1483 if (info->relocateable)
1484 bfd_h_put_64 (input_bfd,
1485 input_section->output_offset + r_vaddr,
1486 (bfd_byte *) ext_rel->r_vaddr);
1487 adjust_addrp = false;
1490 case ALPHA_R_REFLONG:
1491 case ALPHA_R_REFQUAD:
1492 case ALPHA_R_BRADDR:
1494 case ALPHA_R_SREL16:
1495 case ALPHA_R_SREL32:
1496 case ALPHA_R_SREL64:
1500 case ALPHA_R_GPREL32:
1501 /* This relocation is used in a switch table. It is a 32
1502 bit offset from the current GP value. We must adjust it
1503 by the different between the original GP value and the
1504 current GP value. */
1506 addend = ecoff_data (input_bfd)->gp - gp;
1510 case ALPHA_R_LITERAL:
1511 /* This is a reference to a literal value, generally
1512 (always?) in the .lita section. This is a 16 bit GP
1513 relative relocation. Sometimes the subsequent reloc is a
1514 LITUSE reloc, which indicates how this reloc is used.
1515 This sometimes permits rewriting the two instructions
1516 referred to by the LITERAL and the LITUSE into different
1517 instructions which do not refer to .lita. This can save
1518 a memory reference, and permits removing a value from
1519 .lita thus saving GP relative space.
1521 We do not these optimizations. To do them we would need
1522 to arrange to link the .lita section first, so that by
1523 the time we got here we would know the final values to
1524 use. This would not be particularly difficult, but it is
1525 not currently implemented. */
1527 /* I believe that the LITERAL reloc will only apply to a ldq
1528 or ldl instruction, so check my assumption. */
1532 insn = bfd_get_32 (input_bfd,
1533 contents + r_vaddr - input_section->vma);
1534 BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29
1535 || ((insn >> 26) & 0x3f) == 0x28);
1539 addend = ecoff_data (input_bfd)->gp - gp;
1543 case ALPHA_R_LITUSE:
1544 /* See ALPHA_R_LITERAL above for the uses of this reloc. It
1545 does not cause anything to happen, itself. */
1548 case ALPHA_R_GPDISP:
1549 /* This marks the ldah of an ldah/lda pair which loads the
1550 gp register with the difference of the gp value and the
1551 current location. The second of the pair is r_symndx
1552 bytes ahead, and is also marked with an ALPHA_R_IGNORE
1555 unsigned long insn1, insn2;
1557 BFD_ASSERT (ext_rel + 1 < ext_rel_end
1558 && (((ext_rel + 1)->r_bits[0]
1559 & RELOC_BITS0_TYPE_LITTLE)
1560 >> RELOC_BITS0_TYPE_SH_LITTLE) == ALPHA_R_IGNORE
1561 && (bfd_h_get_64 (input_bfd,
1562 (bfd_byte *) (ext_rel + 1)->r_vaddr)
1563 == r_vaddr - input_section->vma + r_symndx));
1565 /* Get the two instructions. */
1566 insn1 = bfd_get_32 (input_bfd,
1567 contents + r_vaddr - input_section->vma);
1568 insn2 = bfd_get_32 (input_bfd,
1571 - input_section->vma
1574 BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */
1575 BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */
1577 /* Get the existing addend. We must account for the sign
1578 extension done by lda and ldah. */
1579 addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff);
1582 /* This is addend -= 0x100000000 without causing an
1583 integer overflow on a 32 bit host. */
1584 addend -= 0x80000000;
1585 addend -= 0x80000000;
1590 /* The existing addend includes the difference between the
1591 gp of the input BFD and the address in the input BFD.
1592 We want to change this to the difference between the
1593 final GP and the final address. */
1595 - ecoff_data (input_bfd)->gp
1596 + input_section->vma
1597 - (input_section->output_section->vma
1598 + input_section->output_offset));
1600 /* Change the instructions, accounting for the sign
1601 extension, and write them out. */
1602 if (addend & 0x8000)
1604 insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff);
1605 insn2 = (insn2 & 0xffff0000) | (addend & 0xffff);
1607 bfd_put_32 (input_bfd, (bfd_vma) insn1,
1608 contents + r_vaddr - input_section->vma);
1609 bfd_put_32 (input_bfd, (bfd_vma) insn2,
1610 contents + r_vaddr - input_section->vma + r_symndx);
1616 case ALPHA_R_OP_PUSH:
1617 case ALPHA_R_OP_PSUB:
1618 case ALPHA_R_OP_PRSHIFT:
1619 /* Manipulate values on the reloc evaluation stack. The
1620 r_vaddr field is not an address in input_section, it is
1621 the current value (including any addend) of the object
1627 s = symndx_to_section[r_symndx];
1628 if (s == (asection *) NULL)
1630 addend = s->output_section->vma + s->output_offset - s->vma;
1634 struct ecoff_link_hash_entry *h;
1636 h = sym_hashes[r_symndx];
1637 if (h == (struct ecoff_link_hash_entry *) NULL)
1640 if (! info->relocateable)
1642 if (h->root.type == bfd_link_hash_defined
1643 || h->root.type == bfd_link_hash_defweak)
1644 addend = (h->root.u.def.value
1645 + h->root.u.def.section->output_section->vma
1646 + h->root.u.def.section->output_offset);
1649 /* Note that we pass the address as 0, since we
1650 do not have a meaningful number for the
1651 location within the section that is being
1653 if (! ((*info->callbacks->undefined_symbol)
1654 (info, h->root.root.string, input_bfd,
1655 input_section, (bfd_vma) 0)))
1662 if (h->root.type != bfd_link_hash_defined
1663 && h->root.type != bfd_link_hash_defweak
1666 /* This symbol is not being written out. Pass
1667 the address as 0, as with undefined_symbol,
1669 if (! ((*info->callbacks->unattached_reloc)
1670 (info, h->root.root.string, input_bfd,
1671 input_section, (bfd_vma) 0)))
1675 addend = alpha_convert_external_reloc (output_bfd, info,
1683 if (info->relocateable)
1685 /* Adjust r_vaddr by the addend. */
1686 bfd_h_put_64 (input_bfd, addend,
1687 (bfd_byte *) ext_rel->r_vaddr);
1693 case ALPHA_R_OP_PUSH:
1694 if (tos >= RELOC_STACKSIZE)
1696 stack[tos++] = addend;
1699 case ALPHA_R_OP_PSUB:
1702 stack[tos - 1] -= addend;
1705 case ALPHA_R_OP_PRSHIFT:
1708 stack[tos - 1] >>= addend;
1713 adjust_addrp = false;
1716 case ALPHA_R_OP_STORE:
1717 /* Store a value from the reloc stack into a bitfield. If
1718 we are generating relocateable output, all we do is
1719 adjust the address of the reloc. */
1720 if (! info->relocateable)
1728 /* Get the relocation mask. The separate steps and the
1729 casts to bfd_vma are attempts to avoid a bug in the
1730 Alpha OSF 1.3 C compiler. See reloc.c for more
1733 mask <<= (bfd_vma) r_size;
1736 /* FIXME: I don't know what kind of overflow checking,
1737 if any, should be done here. */
1738 val = bfd_get_64 (input_bfd,
1739 contents + r_vaddr - input_section->vma);
1740 val &=~ mask << (bfd_vma) r_offset;
1741 val |= (stack[--tos] & mask) << (bfd_vma) r_offset;
1742 bfd_put_64 (input_bfd, val,
1743 contents + r_vaddr - input_section->vma);
1747 case ALPHA_R_GPVALUE:
1748 /* I really don't know if this does the right thing. */
1749 gp = ecoff_data (input_bfd)->gp + r_symndx;
1750 gp_undefined = false;
1756 reloc_howto_type *howto;
1757 struct ecoff_link_hash_entry *h = NULL;
1760 bfd_reloc_status_type r;
1762 /* Perform a relocation. */
1764 howto = &alpha_howto_table[r_type];
1768 h = sym_hashes[r_symndx];
1769 /* If h is NULL, that means that there is a reloc
1770 against an external symbol which we thought was just
1771 a debugging symbol. This should not happen. */
1772 if (h == (struct ecoff_link_hash_entry *) NULL)
1777 if (r_symndx >= NUM_RELOC_SECTIONS)
1780 s = symndx_to_section[r_symndx];
1782 if (s == (asection *) NULL)
1786 if (info->relocateable)
1788 /* We are generating relocateable output, and must
1789 convert the existing reloc. */
1792 if (h->root.type != bfd_link_hash_defined
1793 && h->root.type != bfd_link_hash_defweak
1796 /* This symbol is not being written out. */
1797 if (! ((*info->callbacks->unattached_reloc)
1798 (info, h->root.root.string, input_bfd,
1799 input_section, r_vaddr - input_section->vma)))
1803 relocation = alpha_convert_external_reloc (output_bfd,
1811 /* This is a relocation against a section. Adjust
1812 the value by the amount the section moved. */
1813 relocation = (s->output_section->vma
1818 /* If this is PC relative, the existing object file
1819 appears to already have the reloc worked out. We
1820 must subtract out the old value and add in the new
1822 if (howto->pc_relative)
1823 relocation -= (input_section->output_section->vma
1824 + input_section->output_offset
1825 - input_section->vma);
1827 /* Put in any addend. */
1828 relocation += addend;
1830 /* Adjust the contents. */
1831 r = _bfd_relocate_contents (howto, input_bfd, relocation,
1834 - input_section->vma));
1838 /* We are producing a final executable. */
1841 /* This is a reloc against a symbol. */
1842 if (h->root.type == bfd_link_hash_defined
1843 || h->root.type == bfd_link_hash_defweak)
1847 hsec = h->root.u.def.section;
1848 relocation = (h->root.u.def.value
1849 + hsec->output_section->vma
1850 + hsec->output_offset);
1854 if (! ((*info->callbacks->undefined_symbol)
1855 (info, h->root.root.string, input_bfd,
1857 r_vaddr - input_section->vma)))
1864 /* This is a reloc against a section. */
1865 relocation = (s->output_section->vma
1869 /* Adjust a PC relative relocation by removing the
1870 reference to the original source section. */
1871 if (howto->pc_relative)
1872 relocation += input_section->vma;
1875 r = _bfd_final_link_relocate (howto,
1879 r_vaddr - input_section->vma,
1884 if (r != bfd_reloc_ok)
1889 case bfd_reloc_outofrange:
1891 case bfd_reloc_overflow:
1896 name = sym_hashes[r_symndx]->root.root.string;
1898 name = bfd_section_name (input_bfd,
1899 symndx_to_section[r_symndx]);
1900 if (! ((*info->callbacks->reloc_overflow)
1901 (info, name, alpha_howto_table[r_type].name,
1902 (bfd_vma) 0, input_bfd, input_section,
1903 r_vaddr - input_section->vma)))
1911 if (info->relocateable && adjust_addrp)
1913 /* Change the address of the relocation. */
1914 bfd_h_put_64 (input_bfd,
1915 (input_section->output_section->vma
1916 + input_section->output_offset
1917 - input_section->vma
1919 (bfd_byte *) ext_rel->r_vaddr);
1922 if (gp_usedp && gp_undefined)
1924 if (! ((*info->callbacks->reloc_dangerous)
1925 (info, "GP relative relocation when GP not defined",
1926 input_bfd, input_section, r_vaddr - input_section->vma)))
1928 /* Only give the error once per link. */
1929 ecoff_data (output_bfd)->gp = gp = 4;
1930 gp_undefined = false;
1940 /* Do final adjustments to the filehdr and the aouthdr. This routine
1941 sets the dynamic bits in the file header. */
1945 alpha_adjust_headers (abfd, fhdr, ahdr)
1947 struct internal_filehdr *fhdr;
1948 struct internal_aouthdr *ahdr;
1950 if ((abfd->flags & (DYNAMIC | EXEC_P)) == (DYNAMIC | EXEC_P))
1951 fhdr->f_flags |= F_ALPHA_CALL_SHARED;
1952 else if ((abfd->flags & DYNAMIC) != 0)
1953 fhdr->f_flags |= F_ALPHA_SHARABLE;
1957 /* This is the ECOFF backend structure. The backend field of the
1958 target vector points to this. */
1960 static const struct ecoff_backend_data alpha_ecoff_backend_data =
1962 /* COFF backend structure. */
1964 (void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void, /* aux_in */
1965 (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */
1966 (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */
1967 (unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,/*aux_out*/
1968 (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */
1969 (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */
1970 (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */
1971 alpha_ecoff_swap_filehdr_out, alpha_ecoff_swap_aouthdr_out,
1972 alpha_ecoff_swap_scnhdr_out,
1973 FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, true,
1974 alpha_ecoff_swap_filehdr_in, alpha_ecoff_swap_aouthdr_in,
1975 alpha_ecoff_swap_scnhdr_in, NULL,
1976 alpha_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook,
1977 alpha_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags,
1978 _bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table,
1979 NULL, NULL, NULL, NULL, NULL, NULL, NULL
1981 /* Supported architecture. */
1983 /* Initial portion of armap string. */
1985 /* The page boundary used to align sections in a demand-paged
1986 executable file. E.g., 0x1000. */
1988 /* True if the .rdata section is part of the text segment, as on the
1989 Alpha. False if .rdata is part of the data segment, as on the
1992 /* Bitsize of constructor entries. */
1994 /* Reloc to use for constructor entries. */
1995 &alpha_howto_table[ALPHA_R_REFQUAD],
1997 /* Symbol table magic number. */
1999 /* Alignment of debugging information. E.g., 4. */
2001 /* Sizes of external symbolic information. */
2002 sizeof (struct hdr_ext),
2003 sizeof (struct dnr_ext),
2004 sizeof (struct pdr_ext),
2005 sizeof (struct sym_ext),
2006 sizeof (struct opt_ext),
2007 sizeof (struct fdr_ext),
2008 sizeof (struct rfd_ext),
2009 sizeof (struct ext_ext),
2010 /* Functions to swap in external symbolic data. */
2019 _bfd_ecoff_swap_tir_in,
2020 _bfd_ecoff_swap_rndx_in,
2021 /* Functions to swap out external symbolic data. */
2030 _bfd_ecoff_swap_tir_out,
2031 _bfd_ecoff_swap_rndx_out,
2032 /* Function to read in symbolic data. */
2033 _bfd_ecoff_slurp_symbolic_info
2035 /* External reloc size. */
2037 /* Reloc swapping functions. */
2038 alpha_ecoff_swap_reloc_in,
2039 alpha_ecoff_swap_reloc_out,
2040 /* Backend reloc tweaking. */
2041 alpha_adjust_reloc_in,
2042 alpha_adjust_reloc_out,
2043 /* Relocate section contents while linking. */
2044 alpha_relocate_section,
2045 /* Do final adjustments to filehdr and aouthdr. */
2046 alpha_adjust_headers
2049 /* Looking up a reloc type is Alpha specific. */
2050 #define _bfd_ecoff_bfd_reloc_type_lookup alpha_bfd_reloc_type_lookup
2052 /* So is getting relocated section contents. */
2053 #define _bfd_ecoff_bfd_get_relocated_section_contents \
2054 alpha_ecoff_get_relocated_section_contents
2056 /* Relaxing sections is generic. */
2057 #define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section
2059 const bfd_target ecoffalpha_little_vec =
2061 "ecoff-littlealpha", /* name */
2062 bfd_target_ecoff_flavour,
2063 false, /* data byte order is little */
2064 false, /* header byte order is little */
2066 (HAS_RELOC | EXEC_P | /* object flags */
2067 HAS_LINENO | HAS_DEBUG |
2068 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
2070 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
2071 0, /* leading underscore */
2072 ' ', /* ar_pad_char */
2073 15, /* ar_max_namelen */
2074 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
2075 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
2076 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
2077 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
2078 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
2079 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
2081 {_bfd_dummy_target, alpha_ecoff_object_p, /* bfd_check_format */
2082 _bfd_ecoff_archive_p, _bfd_dummy_target},
2083 {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */
2084 _bfd_generic_mkarchive, bfd_false},
2085 {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */
2086 _bfd_write_archive_contents, bfd_false},
2088 BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
2089 BFD_JUMP_TABLE_COPY (_bfd_ecoff),
2090 BFD_JUMP_TABLE_CORE (_bfd_nocore),
2091 BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
2092 BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
2093 BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
2094 BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
2095 BFD_JUMP_TABLE_LINK (_bfd_ecoff),
2096 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
2098 (PTR) &alpha_ecoff_backend_data