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* libecoff.h (struct ecoff_backend_data): Add adjust_headers
[deliverable/binutils-gdb.git] / bfd / coff-alpha.c
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>.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
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.
12
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.
17
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. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "coff/internal.h"
27 #include "coff/sym.h"
28 #include "coff/symconst.h"
29 #include "coff/ecoff.h"
30 #include "coff/alpha.h"
31 #include "libcoff.h"
32 #include "libecoff.h"
33 \f
34 /* Prototypes for static functions. */
35
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 *,
43 PTR));
44 static void alpha_adjust_reloc_in PARAMS ((bfd *,
45 const struct internal_reloc *,
46 arelent *));
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 *,
56 bfd *, asection *,
57 bfd_byte *, PTR));
58 static boolean alpha_adjust_headers
59 PARAMS ((bfd *, struct internal_filehdr *, struct internal_aouthdr *));
60 \f
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.
66
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. */
70
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
97
98 #define ALPHAECOFF
99
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"
110
111 /* Get the ECOFF swapping routines. */
112 #define ECOFF_64
113 #include "ecoffswap.h"
114 \f
115 /* How to process the various reloc types. */
116
117 static bfd_reloc_status_type
118 reloc_nil PARAMS ((bfd *, arelent *, asymbol *, PTR,
119 asection *, bfd *, char **));
120
121 static bfd_reloc_status_type
122 reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
123 bfd *abfd;
124 arelent *reloc;
125 asymbol *sym;
126 PTR data;
127 asection *sec;
128 bfd *output_bfd;
129 char **error_message;
130 {
131 return bfd_reloc_ok;
132 }
133
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)
137
138 static reloc_howto_type alpha_howto_table[] =
139 {
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 */
144 0, /* rightshift */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
146 8, /* bitsize */
147 true, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 reloc_nil, /* special_function */
151 "IGNORE", /* name */
152 true, /* partial_inplace */
153 0, /* src_mask */
154 0, /* dst_mask */
155 true), /* pcrel_offset */
156
157 /* A 32 bit reference to a symbol. */
158 HOWTO (ALPHA_R_REFLONG, /* type */
159 0, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 32, /* bitsize */
162 false, /* pc_relative */
163 0, /* bitpos */
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 */
171
172 /* A 64 bit reference to a symbol. */
173 HOWTO (ALPHA_R_REFQUAD, /* type */
174 0, /* rightshift */
175 4, /* size (0 = byte, 1 = short, 2 = long) */
176 64, /* bitsize */
177 false, /* pc_relative */
178 0, /* bitpos */
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 */
186
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
189 added in. */
190 HOWTO (ALPHA_R_GPREL32, /* type */
191 0, /* rightshift */
192 2, /* size (0 = byte, 1 = short, 2 = long) */
193 32, /* bitsize */
194 false, /* pc_relative */
195 0, /* bitpos */
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 */
203
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 */
208 0, /* rightshift */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
210 16, /* bitsize */
211 false, /* pc_relative */
212 0, /* bitpos */
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 */
220
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
229 relocation. */
230 HOWTO (ALPHA_R_LITUSE, /* type */
231 0, /* rightshift */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
233 32, /* bitsize */
234 false, /* pc_relative */
235 0, /* bitpos */
236 complain_overflow_dont, /* complain_on_overflow */
237 reloc_nil, /* special_function */
238 "LITUSE", /* name */
239 false, /* partial_inplace */
240 0, /* src_mask */
241 0, /* dst_mask */
242 false), /* pcrel_offset */
243
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
254 address. */
255 HOWTO (ALPHA_R_GPDISP, /* type */
256 16, /* rightshift */
257 2, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 true, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 reloc_nil, /* special_function */
263 "GPDISP", /* name */
264 true, /* partial_inplace */
265 0xffff, /* src_mask */
266 0xffff, /* dst_mask */
267 true), /* pcrel_offset */
268
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 */
273 2, /* rightshift */
274 2, /* size (0 = byte, 1 = short, 2 = long) */
275 21, /* bitsize */
276 true, /* pc_relative */
277 0, /* bitpos */
278 complain_overflow_signed, /* complain_on_overflow */
279 0, /* special_function */
280 "BRADDR", /* name */
281 true, /* partial_inplace */
282 0x1fffff, /* src_mask */
283 0x1fffff, /* dst_mask */
284 false), /* pcrel_offset */
285
286 /* A hint for a jump to a register. */
287 HOWTO (ALPHA_R_HINT, /* type */
288 2, /* rightshift */
289 2, /* size (0 = byte, 1 = short, 2 = long) */
290 14, /* bitsize */
291 true, /* pc_relative */
292 0, /* bitpos */
293 complain_overflow_dont, /* complain_on_overflow */
294 0, /* special_function */
295 "HINT", /* name */
296 true, /* partial_inplace */
297 0x3fff, /* src_mask */
298 0x3fff, /* dst_mask */
299 false), /* pcrel_offset */
300
301 /* 16 bit PC relative offset. */
302 HOWTO (ALPHA_R_SREL16, /* type */
303 0, /* rightshift */
304 1, /* size (0 = byte, 1 = short, 2 = long) */
305 16, /* bitsize */
306 true, /* pc_relative */
307 0, /* bitpos */
308 complain_overflow_signed, /* complain_on_overflow */
309 0, /* special_function */
310 "SREL16", /* name */
311 true, /* partial_inplace */
312 0xffff, /* src_mask */
313 0xffff, /* dst_mask */
314 false), /* pcrel_offset */
315
316 /* 32 bit PC relative offset. */
317 HOWTO (ALPHA_R_SREL32, /* type */
318 0, /* rightshift */
319 2, /* size (0 = byte, 1 = short, 2 = long) */
320 32, /* bitsize */
321 true, /* pc_relative */
322 0, /* bitpos */
323 complain_overflow_signed, /* complain_on_overflow */
324 0, /* special_function */
325 "SREL32", /* name */
326 true, /* partial_inplace */
327 0xffffffff, /* src_mask */
328 0xffffffff, /* dst_mask */
329 false), /* pcrel_offset */
330
331 /* A 64 bit PC relative offset. */
332 HOWTO (ALPHA_R_SREL64, /* type */
333 0, /* rightshift */
334 4, /* size (0 = byte, 1 = short, 2 = long) */
335 64, /* bitsize */
336 true, /* pc_relative */
337 0, /* bitpos */
338 complain_overflow_signed, /* complain_on_overflow */
339 0, /* special_function */
340 "SREL64", /* name */
341 true, /* partial_inplace */
342 MINUS_ONE, /* src_mask */
343 MINUS_ONE, /* dst_mask */
344 false), /* pcrel_offset */
345
346 /* Push a value on the reloc evaluation stack. */
347 HOWTO (ALPHA_R_OP_PUSH, /* type */
348 0, /* rightshift */
349 0, /* size (0 = byte, 1 = short, 2 = long) */
350 0, /* bitsize */
351 false, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_dont, /* complain_on_overflow */
354 0, /* special_function */
355 "OP_PUSH", /* name */
356 false, /* partial_inplace */
357 0, /* src_mask */
358 0, /* dst_mask */
359 false), /* pcrel_offset */
360
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 */
364 0, /* rightshift */
365 4, /* size (0 = byte, 1 = short, 2 = long) */
366 64, /* bitsize */
367 false, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_dont, /* complain_on_overflow */
370 0, /* special_function */
371 "OP_STORE", /* name */
372 false, /* partial_inplace */
373 0, /* src_mask */
374 MINUS_ONE, /* dst_mask */
375 false), /* pcrel_offset */
376
377 /* Subtract the reloc address from the value on the top of the
378 relocation stack. */
379 HOWTO (ALPHA_R_OP_PSUB, /* type */
380 0, /* rightshift */
381 0, /* size (0 = byte, 1 = short, 2 = long) */
382 0, /* bitsize */
383 false, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_dont, /* complain_on_overflow */
386 0, /* special_function */
387 "OP_PSUB", /* name */
388 false, /* partial_inplace */
389 0, /* src_mask */
390 0, /* dst_mask */
391 false), /* pcrel_offset */
392
393 /* Shift the value on the top of the relocation stack right by the
394 given value. */
395 HOWTO (ALPHA_R_OP_PRSHIFT, /* type */
396 0, /* rightshift */
397 0, /* size (0 = byte, 1 = short, 2 = long) */
398 0, /* bitsize */
399 false, /* pc_relative */
400 0, /* bitpos */
401 complain_overflow_dont, /* complain_on_overflow */
402 0, /* special_function */
403 "OP_PRSHIFT", /* name */
404 false, /* partial_inplace */
405 0, /* src_mask */
406 0, /* dst_mask */
407 false), /* pcrel_offset */
408
409 /* Adjust the GP value for a new range in the object file. */
410 HOWTO (ALPHA_R_GPVALUE, /* type */
411 0, /* rightshift */
412 0, /* size (0 = byte, 1 = short, 2 = long) */
413 0, /* bitsize */
414 false, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_dont, /* complain_on_overflow */
417 0, /* special_function */
418 "GPVALUE", /* name */
419 false, /* partial_inplace */
420 0, /* src_mask */
421 0, /* dst_mask */
422 false) /* pcrel_offset */
423 };
424 \f
425 /* Recognize an Alpha ECOFF file. */
426
427 static const bfd_target *
428 alpha_ecoff_object_p (abfd)
429 bfd *abfd;
430 {
431 static const bfd_target *ret;
432
433 ret = coff_object_p (abfd);
434
435 if (ret != NULL)
436 {
437 asection *sec;
438
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
447 alignment. */
448 sec = bfd_get_section_by_name (abfd, _PDATA);
449 if (sec != (asection *) NULL)
450 {
451 bfd_size_type size;
452
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))
457 return NULL;
458 }
459 }
460
461 return ret;
462 }
463
464 /* See whether the magic number matches. */
465
466 static boolean
467 alpha_ecoff_bad_format_hook (abfd, filehdr)
468 bfd *abfd;
469 PTR filehdr;
470 {
471 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
472
473 if (ALPHA_ECOFF_BADMAG (*internal_f))
474 return false;
475
476 return true;
477 }
478
479 /* This is a hook called by coff_real_object_p to create any backend
480 specific information. */
481
482 static PTR
483 alpha_ecoff_mkobject_hook (abfd, filehdr, aouthdr)
484 bfd *abfd;
485 PTR filehdr;
486 PTR aouthdr;
487 {
488 PTR ecoff;
489
490 ecoff = _bfd_ecoff_mkobject_hook (abfd, filehdr, aouthdr);
491
492 if (ecoff != NULL)
493 {
494 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
495
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)
499 {
500 case F_ALPHA_SHARABLE:
501 abfd->flags |= DYNAMIC;
502 break;
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);
507 break;
508 }
509 }
510 return ecoff;
511 }
512 \f
513 /* Reloc handling. */
514
515 /* Swap a reloc in. */
516
517 static void
518 alpha_ecoff_swap_reloc_in (abfd, ext_ptr, intern)
519 bfd *abfd;
520 PTR ext_ptr;
521 struct internal_reloc *intern;
522 {
523 const RELOC *ext = (RELOC *) ext_ptr;
524
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);
527
528 BFD_ASSERT (abfd->xvec->header_byteorder_big_p == false);
529
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);
538
539 if (intern->r_type == ALPHA_R_LITUSE
540 || intern->r_type == ALPHA_R_GPDISP)
541 {
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)
547 abort ();
548 intern->r_size = intern->r_symndx;
549 intern->r_symndx = RELOC_SECTION_NONE;
550 }
551 else if (intern->r_type == ALPHA_R_IGNORE)
552 {
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))
558 abort ();
559 if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA)
560 intern->r_symndx = RELOC_SECTION_NONE;
561 }
562 }
563
564 /* Swap a reloc out. */
565
566 static void
567 alpha_ecoff_swap_reloc_out (abfd, intern, dst)
568 bfd *abfd;
569 const struct internal_reloc *intern;
570 PTR dst;
571 {
572 RELOC *ext = (RELOC *) dst;
573 long symndx;
574 unsigned char size;
575
576 /* Undo the hackery done in swap_reloc_in. */
577 if (intern->r_type == ALPHA_R_LITUSE
578 || intern->r_type == ALPHA_R_GPDISP)
579 {
580 symndx = intern->r_size;
581 size = 0;
582 }
583 else if (intern->r_type == ALPHA_R_IGNORE
584 && ! intern->r_extern
585 && intern->r_symndx == RELOC_SECTION_NONE)
586 {
587 symndx = RELOC_SECTION_LITA;
588 size = intern->r_size;
589 }
590 else
591 {
592 symndx = intern->r_symndx;
593 size = intern->r_size;
594 }
595
596 BFD_ASSERT (intern->r_extern
597 || (intern->r_symndx >= 0 && intern->r_symndx <= 14));
598
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);
601
602 BFD_ASSERT (abfd->xvec->header_byteorder_big_p == false);
603
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));
609 ext->r_bits[2] = 0;
610 ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE)
611 & RELOC_BITS3_SIZE_LITTLE);
612 }
613
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. */
617
618 static void
619 alpha_adjust_reloc_in (abfd, intern, rptr)
620 bfd *abfd;
621 const struct internal_reloc *intern;
622 arelent *rptr;
623 {
624 if (intern->r_type > ALPHA_R_GPVALUE)
625 abort ();
626
627 switch (intern->r_type)
628 {
629 case ALPHA_R_BRADDR:
630 case ALPHA_R_SREL16:
631 case ALPHA_R_SREL32:
632 case ALPHA_R_SREL64:
633 /* The PC relative relocs do not seem to use the section VMA as
634 a negative addend. */
635 rptr->addend = 0;
636 break;
637
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;
644 break;
645
646 case ALPHA_R_LITUSE:
647 case ALPHA_R_GPDISP:
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
650 addend field. */
651 rptr->addend = intern->r_size;
652 break;
653
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;
659 break;
660
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
666 addend. */
667 rptr->addend = intern->r_vaddr;
668 break;
669
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;
673 break;
674
675 case ALPHA_R_IGNORE:
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;
684 break;
685
686 default:
687 break;
688 }
689
690 rptr->howto = &alpha_howto_table[intern->r_type];
691 }
692
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
696 not need to undo. */
697
698 static void
699 alpha_adjust_reloc_out (abfd, rel, intern)
700 bfd *abfd;
701 const arelent *rel;
702 struct internal_reloc *intern;
703 {
704 switch (intern->r_type)
705 {
706 case ALPHA_R_LITUSE:
707 case ALPHA_R_GPDISP:
708 intern->r_size = rel->addend;
709 break;
710
711 case ALPHA_R_OP_STORE:
712 intern->r_size = rel->addend & 0xff;
713 intern->r_offset = (rel->addend >> 8) & 0xff;
714 break;
715
716 case ALPHA_R_OP_PUSH:
717 case ALPHA_R_OP_PSUB:
718 case ALPHA_R_OP_PRSHIFT:
719 intern->r_vaddr = rel->addend;
720 break;
721
722 case ALPHA_R_IGNORE:
723 intern->r_vaddr = rel->address;
724 if (intern->r_symndx == RELOC_SECTION_ABS)
725 intern->r_symndx = RELOC_SECTION_NONE;
726 break;
727
728 default:
729 break;
730 }
731 }
732
733 /* The size of the stack for the relocation evaluator. */
734 #define RELOC_STACKSIZE (10)
735
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. */
741
742 static bfd_byte *
743 alpha_ecoff_get_relocated_section_contents (abfd, link_info, link_order,
744 data, relocateable, symbols)
745 bfd *abfd;
746 struct bfd_link_info *link_info;
747 struct bfd_link_order *link_order;
748 bfd_byte *data;
749 boolean relocateable;
750 asymbol **symbols;
751 {
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;
756 long reloc_count;
757 bfd *output_bfd = relocateable ? abfd : (bfd *) NULL;
758 bfd_vma gp;
759 boolean gp_undefined;
760 bfd_vma stack[RELOC_STACKSIZE];
761 int tos = 0;
762
763 if (reloc_size < 0)
764 goto error_return;
765 reloc_vector = (arelent **) malloc (reloc_size);
766 if (reloc_vector == NULL && reloc_size != 0)
767 {
768 bfd_set_error (bfd_error_no_memory);
769 goto error_return;
770 }
771
772 if (! bfd_get_section_contents (input_bfd, input_section, data,
773 (file_ptr) 0, input_section->_raw_size))
774 goto error_return;
775
776 /* The section size is not going to change. */
777 input_section->_cooked_size = input_section->_raw_size;
778 input_section->reloc_done = true;
779
780 reloc_count = bfd_canonicalize_reloc (input_bfd, input_section,
781 reloc_vector, symbols);
782 if (reloc_count < 0)
783 goto error_return;
784 if (reloc_count == 0)
785 goto successful_return;
786
787 /* Get the GP value for the output BFD. */
788 gp_undefined = false;
789 if (ecoff_data (abfd)->gp == 0)
790 {
791 if (relocateable != false)
792 {
793 asection *sec;
794 bfd_vma lo;
795
796 /* Make up a value. */
797 lo = (bfd_vma) -1;
798 for (sec = abfd->sections; sec != NULL; sec = sec->next)
799 {
800 if (sec->vma < lo
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))
806 lo = sec->vma;
807 }
808 ecoff_data (abfd)->gp = lo + 0x8000;
809 }
810 else
811 {
812 struct bfd_link_hash_entry *h;
813
814 h = bfd_link_hash_lookup (link_info->hash, "_gp", false, false,
815 true);
816 if (h == (struct bfd_link_hash_entry *) NULL
817 || h->type != bfd_link_hash_defined)
818 gp_undefined = true;
819 else
820 ecoff_data (abfd)->gp = (h->u.def.value
821 + h->u.def.section->output_section->vma
822 + h->u.def.section->output_offset);
823 }
824 }
825 gp = ecoff_data (abfd)->gp;
826
827 for (; *reloc_vector != (arelent *) NULL; reloc_vector++)
828 {
829 arelent *rel;
830 bfd_reloc_status_type r;
831 char *err;
832
833 rel = *reloc_vector;
834 r = bfd_reloc_ok;
835 switch (rel->howto->type)
836 {
837 case ALPHA_R_IGNORE:
838 rel->address += input_section->output_offset;
839 break;
840
841 case ALPHA_R_REFLONG:
842 case ALPHA_R_REFQUAD:
843 case ALPHA_R_BRADDR:
844 case ALPHA_R_HINT:
845 case ALPHA_R_SREL16:
846 case ALPHA_R_SREL32:
847 case ALPHA_R_SREL64:
848 if (relocateable
849 && ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
850 {
851 rel->address += input_section->output_offset;
852 break;
853 }
854 r = bfd_perform_relocation (input_bfd, rel, data, input_section,
855 output_bfd, &err);
856 break;
857
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. */
865 rel->addend -= gp;
866 r = bfd_perform_relocation (input_bfd, rel, data, input_section,
867 output_bfd, &err);
868 if (r == bfd_reloc_ok && gp_undefined)
869 {
870 r = bfd_reloc_dangerous;
871 err = (char *) "GP relative relocation used when GP not defined";
872 }
873 break;
874
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.
885
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. */
891
892 {
893 unsigned long insn;
894
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);
900
901 rel->addend -= gp;
902 r = bfd_perform_relocation (input_bfd, rel, data, input_section,
903 output_bfd, &err);
904 if (r == bfd_reloc_ok && gp_undefined)
905 {
906 r = bfd_reloc_dangerous;
907 err =
908 (char *) "GP relative relocation used when GP not defined";
909 }
910 }
911 break;
912
913 case ALPHA_R_LITUSE:
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;
917 break;
918
919 case ALPHA_R_GPDISP:
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. */
924 {
925 unsigned long insn1, insn2;
926 bfd_vma addend;
927
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));
932
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);
936
937 BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */
938 BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */
939
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);
943 if (insn1 & 0x8000)
944 {
945 addend -= 0x80000000;
946 addend -= 0x80000000;
947 }
948 if (insn2 & 0x8000)
949 addend -= 0x10000;
950
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));
956
957 /* Now add in the final gp value, and subtract out the
958 final address. */
959 addend += (gp
960 - (input_section->output_section->vma
961 + input_section->output_offset
962 + rel->address));
963
964 /* Change the instructions, accounting for the sign
965 extension, and write them out. */
966 if (addend & 0x8000)
967 addend += 0x10000;
968 insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff);
969 insn2 = (insn2 & 0xffff0000) | (addend & 0xffff);
970
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);
974
975 rel->address += input_section->output_offset;
976 }
977 break;
978
979 case ALPHA_R_OP_PUSH:
980 /* Push a value on the reloc evaluation stack. */
981 {
982 asymbol *symbol;
983 bfd_vma relocation;
984
985 if (relocateable)
986 {
987 rel->address += input_section->output_offset;
988 break;
989 }
990
991 /* Figure out the relocation of this symbol. */
992 symbol = *rel->sym_ptr_ptr;
993
994 if (bfd_is_und_section (symbol->section))
995 r = bfd_reloc_undefined;
996
997 if (bfd_is_com_section (symbol->section))
998 relocation = 0;
999 else
1000 relocation = symbol->value;
1001 relocation += symbol->section->output_section->vma;
1002 relocation += symbol->section->output_offset;
1003 relocation += rel->addend;
1004
1005 if (tos >= RELOC_STACKSIZE)
1006 abort ();
1007
1008 stack[tos++] = relocation;
1009 }
1010 break;
1011
1012 case ALPHA_R_OP_STORE:
1013 /* Store a value from the reloc stack into a bitfield. */
1014 {
1015 bfd_vma val;
1016 int offset, size;
1017
1018 if (relocateable)
1019 {
1020 rel->address += input_section->output_offset;
1021 break;
1022 }
1023
1024 if (tos == 0)
1025 abort ();
1026
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;
1031
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);
1036 }
1037 break;
1038
1039 case ALPHA_R_OP_PSUB:
1040 /* Subtract a value from the top of the stack. */
1041 {
1042 asymbol *symbol;
1043 bfd_vma relocation;
1044
1045 if (relocateable)
1046 {
1047 rel->address += input_section->output_offset;
1048 break;
1049 }
1050
1051 /* Figure out the relocation of this symbol. */
1052 symbol = *rel->sym_ptr_ptr;
1053
1054 if (bfd_is_und_section (symbol->section))
1055 r = bfd_reloc_undefined;
1056
1057 if (bfd_is_com_section (symbol->section))
1058 relocation = 0;
1059 else
1060 relocation = symbol->value;
1061 relocation += symbol->section->output_section->vma;
1062 relocation += symbol->section->output_offset;
1063 relocation += rel->addend;
1064
1065 if (tos == 0)
1066 abort ();
1067
1068 stack[tos - 1] -= relocation;
1069 }
1070 break;
1071
1072 case ALPHA_R_OP_PRSHIFT:
1073 /* Shift the value on the top of the stack. */
1074 {
1075 asymbol *symbol;
1076 bfd_vma relocation;
1077
1078 if (relocateable)
1079 {
1080 rel->address += input_section->output_offset;
1081 break;
1082 }
1083
1084 /* Figure out the relocation of this symbol. */
1085 symbol = *rel->sym_ptr_ptr;
1086
1087 if (bfd_is_und_section (symbol->section))
1088 r = bfd_reloc_undefined;
1089
1090 if (bfd_is_com_section (symbol->section))
1091 relocation = 0;
1092 else
1093 relocation = symbol->value;
1094 relocation += symbol->section->output_section->vma;
1095 relocation += symbol->section->output_offset;
1096 relocation += rel->addend;
1097
1098 if (tos == 0)
1099 abort ();
1100
1101 stack[tos - 1] >>= relocation;
1102 }
1103 break;
1104
1105 case ALPHA_R_GPVALUE:
1106 /* I really don't know if this does the right thing. */
1107 gp = rel->addend;
1108 gp_undefined = false;
1109 break;
1110
1111 default:
1112 abort ();
1113 }
1114
1115 if (relocateable)
1116 {
1117 asection *os = input_section->output_section;
1118
1119 /* A partial link, so keep the relocs. */
1120 os->orelocation[os->reloc_count] = rel;
1121 os->reloc_count++;
1122 }
1123
1124 if (r != bfd_reloc_ok)
1125 {
1126 switch (r)
1127 {
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)))
1132 goto error_return;
1133 break;
1134 case bfd_reloc_dangerous:
1135 if (! ((*link_info->callbacks->reloc_dangerous)
1136 (link_info, err, input_bfd, input_section,
1137 rel->address)))
1138 goto error_return;
1139 break;
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)))
1145 goto error_return;
1146 break;
1147 case bfd_reloc_outofrange:
1148 default:
1149 abort ();
1150 break;
1151 }
1152 }
1153 }
1154
1155 if (tos != 0)
1156 abort ();
1157
1158 successful_return:
1159 if (reloc_vector != NULL)
1160 free (reloc_vector);
1161 return data;
1162
1163 error_return:
1164 if (reloc_vector != NULL)
1165 free (reloc_vector);
1166 return NULL;
1167 }
1168
1169 /* Get the howto structure for a generic reloc type. */
1170
1171 static reloc_howto_type *
1172 alpha_bfd_reloc_type_lookup (abfd, code)
1173 bfd *abfd;
1174 bfd_reloc_code_real_type code;
1175 {
1176 int alpha_type;
1177
1178 switch (code)
1179 {
1180 case BFD_RELOC_32:
1181 alpha_type = ALPHA_R_REFLONG;
1182 break;
1183 case BFD_RELOC_64:
1184 case BFD_RELOC_CTOR:
1185 alpha_type = ALPHA_R_REFQUAD;
1186 break;
1187 case BFD_RELOC_GPREL32:
1188 alpha_type = ALPHA_R_GPREL32;
1189 break;
1190 case BFD_RELOC_ALPHA_LITERAL:
1191 alpha_type = ALPHA_R_LITERAL;
1192 break;
1193 case BFD_RELOC_ALPHA_LITUSE:
1194 alpha_type = ALPHA_R_LITUSE;
1195 break;
1196 case BFD_RELOC_ALPHA_GPDISP_HI16:
1197 alpha_type = ALPHA_R_GPDISP;
1198 break;
1199 case BFD_RELOC_ALPHA_GPDISP_LO16:
1200 alpha_type = ALPHA_R_IGNORE;
1201 break;
1202 case BFD_RELOC_23_PCREL_S2:
1203 alpha_type = ALPHA_R_BRADDR;
1204 break;
1205 case BFD_RELOC_ALPHA_HINT:
1206 alpha_type = ALPHA_R_HINT;
1207 break;
1208 case BFD_RELOC_16_PCREL:
1209 alpha_type = ALPHA_R_SREL16;
1210 break;
1211 case BFD_RELOC_32_PCREL:
1212 alpha_type = ALPHA_R_SREL32;
1213 break;
1214 case BFD_RELOC_64_PCREL:
1215 alpha_type = ALPHA_R_SREL64;
1216 break;
1217 #if 0
1218 case ???:
1219 alpha_type = ALPHA_R_OP_PUSH;
1220 break;
1221 case ???:
1222 alpha_type = ALPHA_R_OP_STORE;
1223 break;
1224 case ???:
1225 alpha_type = ALPHA_R_OP_PSUB;
1226 break;
1227 case ???:
1228 alpha_type = ALPHA_R_OP_PRSHIFT;
1229 break;
1230 case ???:
1231 alpha_type = ALPHA_R_GPVALUE;
1232 break;
1233 #endif
1234 default:
1235 return (reloc_howto_type *) NULL;
1236 }
1237
1238 return &alpha_howto_table[alpha_type];
1239 }
1240 \f
1241 /* A helper routine for alpha_relocate_section which converts an
1242 external reloc when generating relocateable output. Returns the
1243 relocation amount. */
1244
1245 static bfd_vma
1246 alpha_convert_external_reloc (output_bfd, info, input_bfd, ext_rel, h)
1247 bfd *output_bfd;
1248 struct bfd_link_info *info;
1249 bfd *input_bfd;
1250 struct external_reloc *ext_rel;
1251 struct ecoff_link_hash_entry *h;
1252 {
1253 unsigned long r_symndx;
1254 bfd_vma relocation;
1255
1256 BFD_ASSERT (info->relocateable);
1257
1258 if (h->root.type == bfd_link_hash_defined
1259 || h->root.type == bfd_link_hash_defweak)
1260 {
1261 asection *hsec;
1262 const char *name;
1263
1264 /* This symbol is defined in the output. Convert the reloc from
1265 being against the symbol to being against the section. */
1266
1267 /* Clear the r_extern bit. */
1268 ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE;
1269
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);
1273
1274 r_symndx = -1;
1275 switch (name[1])
1276 {
1277 case 'A':
1278 if (strcmp (name, "*ABS*") == 0)
1279 r_symndx = RELOC_SECTION_ABS;
1280 break;
1281 case 'b':
1282 if (strcmp (name, ".bss") == 0)
1283 r_symndx = RELOC_SECTION_BSS;
1284 break;
1285 case 'd':
1286 if (strcmp (name, ".data") == 0)
1287 r_symndx = RELOC_SECTION_DATA;
1288 break;
1289 case 'f':
1290 if (strcmp (name, ".fini") == 0)
1291 r_symndx = RELOC_SECTION_FINI;
1292 break;
1293 case 'i':
1294 if (strcmp (name, ".init") == 0)
1295 r_symndx = RELOC_SECTION_INIT;
1296 break;
1297 case 'l':
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;
1304 break;
1305 case 'p':
1306 if (strcmp (name, ".pdata") == 0)
1307 r_symndx = RELOC_SECTION_PDATA;
1308 break;
1309 case 'r':
1310 if (strcmp (name, ".rdata") == 0)
1311 r_symndx = RELOC_SECTION_RDATA;
1312 break;
1313 case 's':
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;
1318 break;
1319 case 't':
1320 if (strcmp (name, ".text") == 0)
1321 r_symndx = RELOC_SECTION_TEXT;
1322 break;
1323 case 'x':
1324 if (strcmp (name, ".xdata") == 0)
1325 r_symndx = RELOC_SECTION_XDATA;
1326 break;
1327 }
1328
1329 if (r_symndx == -1)
1330 abort ();
1331
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);
1336 }
1337 else
1338 {
1339 /* Change the symndx value to the right one for
1340 the output BFD. */
1341 r_symndx = h->indx;
1342 if (r_symndx == -1)
1343 {
1344 /* Caller must give an error. */
1345 r_symndx = 0;
1346 }
1347 relocation = 0;
1348 }
1349
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);
1353
1354 return relocation;
1355 }
1356
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. */
1360
1361 static boolean
1362 alpha_relocate_section (output_bfd, info, input_bfd, input_section,
1363 contents, external_relocs)
1364 bfd *output_bfd;
1365 struct bfd_link_info *info;
1366 bfd *input_bfd;
1367 asection *input_section;
1368 bfd_byte *contents;
1369 PTR external_relocs;
1370 {
1371 asection **symndx_to_section;
1372 struct ecoff_link_hash_entry **sym_hashes;
1373 bfd_vma gp;
1374 boolean gp_undefined;
1375 bfd_vma stack[RELOC_STACKSIZE];
1376 int tos = 0;
1377 struct external_reloc *ext_rel;
1378 struct external_reloc *ext_rel_end;
1379
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)
1385 {
1386 symndx_to_section = ((asection **)
1387 bfd_alloc (input_bfd,
1388 (NUM_RELOC_SECTIONS
1389 * sizeof (asection *))));
1390 if (!symndx_to_section)
1391 {
1392 bfd_set_error (bfd_error_no_memory);
1393 return false;
1394 }
1395
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;
1424
1425 ecoff_data (input_bfd)->symndx_to_section = symndx_to_section;
1426 }
1427
1428 sym_hashes = ecoff_data (input_bfd)->sym_hashes;
1429
1430 gp = ecoff_data (output_bfd)->gp;
1431 if (gp == 0)
1432 gp_undefined = true;
1433 else
1434 gp_undefined = false;
1435
1436 BFD_ASSERT (output_bfd->xvec->header_byteorder_big_p == false);
1437 BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p == false);
1438
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++)
1442 {
1443 bfd_vma r_vaddr;
1444 unsigned long r_symndx;
1445 int r_type;
1446 int r_extern;
1447 int r_offset;
1448 int r_size;
1449 boolean relocatep;
1450 boolean adjust_addrp;
1451 boolean gp_usedp;
1452 bfd_vma addend;
1453
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);
1456
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);
1465
1466 relocatep = false;
1467 adjust_addrp = true;
1468 gp_usedp = false;
1469 addend = 0;
1470
1471 switch (r_type)
1472 {
1473 default:
1474 abort ();
1475
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;
1488 break;
1489
1490 case ALPHA_R_REFLONG:
1491 case ALPHA_R_REFQUAD:
1492 case ALPHA_R_BRADDR:
1493 case ALPHA_R_HINT:
1494 case ALPHA_R_SREL16:
1495 case ALPHA_R_SREL32:
1496 case ALPHA_R_SREL64:
1497 relocatep = true;
1498 break;
1499
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. */
1505 relocatep = true;
1506 addend = ecoff_data (input_bfd)->gp - gp;
1507 gp_usedp = true;
1508 break;
1509
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.
1520
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. */
1526
1527 /* I believe that the LITERAL reloc will only apply to a ldq
1528 or ldl instruction, so check my assumption. */
1529 {
1530 unsigned long insn;
1531
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);
1536 }
1537
1538 relocatep = true;
1539 addend = ecoff_data (input_bfd)->gp - gp;
1540 gp_usedp = true;
1541 break;
1542
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. */
1546 break;
1547
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
1553 reloc. */
1554 {
1555 unsigned long insn1, insn2;
1556
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));
1564
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,
1569 (contents
1570 + r_vaddr
1571 - input_section->vma
1572 + r_symndx));
1573
1574 BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */
1575 BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */
1576
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);
1580 if (insn1 & 0x8000)
1581 {
1582 /* This is addend -= 0x100000000 without causing an
1583 integer overflow on a 32 bit host. */
1584 addend -= 0x80000000;
1585 addend -= 0x80000000;
1586 }
1587 if (insn2 & 0x8000)
1588 addend -= 0x10000;
1589
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. */
1594 addend += (gp
1595 - ecoff_data (input_bfd)->gp
1596 + input_section->vma
1597 - (input_section->output_section->vma
1598 + input_section->output_offset));
1599
1600 /* Change the instructions, accounting for the sign
1601 extension, and write them out. */
1602 if (addend & 0x8000)
1603 addend += 0x10000;
1604 insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff);
1605 insn2 = (insn2 & 0xffff0000) | (addend & 0xffff);
1606
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);
1611
1612 gp_usedp = true;
1613 }
1614 break;
1615
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
1622 being used. */
1623 if (! r_extern)
1624 {
1625 asection *s;
1626
1627 s = symndx_to_section[r_symndx];
1628 if (s == (asection *) NULL)
1629 abort ();
1630 addend = s->output_section->vma + s->output_offset - s->vma;
1631 }
1632 else
1633 {
1634 struct ecoff_link_hash_entry *h;
1635
1636 h = sym_hashes[r_symndx];
1637 if (h == (struct ecoff_link_hash_entry *) NULL)
1638 abort ();
1639
1640 if (! info->relocateable)
1641 {
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);
1647 else
1648 {
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
1652 relocated. */
1653 if (! ((*info->callbacks->undefined_symbol)
1654 (info, h->root.root.string, input_bfd,
1655 input_section, (bfd_vma) 0)))
1656 return false;
1657 addend = 0;
1658 }
1659 }
1660 else
1661 {
1662 if (h->root.type != bfd_link_hash_defined
1663 && h->root.type != bfd_link_hash_defweak
1664 && h->indx == -1)
1665 {
1666 /* This symbol is not being written out. Pass
1667 the address as 0, as with undefined_symbol,
1668 above. */
1669 if (! ((*info->callbacks->unattached_reloc)
1670 (info, h->root.root.string, input_bfd,
1671 input_section, (bfd_vma) 0)))
1672 return false;
1673 }
1674
1675 addend = alpha_convert_external_reloc (output_bfd, info,
1676 input_bfd,
1677 ext_rel, h);
1678 }
1679 }
1680
1681 addend += r_vaddr;
1682
1683 if (info->relocateable)
1684 {
1685 /* Adjust r_vaddr by the addend. */
1686 bfd_h_put_64 (input_bfd, addend,
1687 (bfd_byte *) ext_rel->r_vaddr);
1688 }
1689 else
1690 {
1691 switch (r_type)
1692 {
1693 case ALPHA_R_OP_PUSH:
1694 if (tos >= RELOC_STACKSIZE)
1695 abort ();
1696 stack[tos++] = addend;
1697 break;
1698
1699 case ALPHA_R_OP_PSUB:
1700 if (tos == 0)
1701 abort ();
1702 stack[tos - 1] -= addend;
1703 break;
1704
1705 case ALPHA_R_OP_PRSHIFT:
1706 if (tos == 0)
1707 abort ();
1708 stack[tos - 1] >>= addend;
1709 break;
1710 }
1711 }
1712
1713 adjust_addrp = false;
1714 break;
1715
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)
1721 {
1722 bfd_vma mask;
1723 bfd_vma val;
1724
1725 if (tos == 0)
1726 abort ();
1727
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
1731 details. */
1732 mask = 1;
1733 mask <<= (bfd_vma) r_size;
1734 mask -= 1;
1735
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);
1744 }
1745 break;
1746
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;
1751 break;
1752 }
1753
1754 if (relocatep)
1755 {
1756 reloc_howto_type *howto;
1757 struct ecoff_link_hash_entry *h = NULL;
1758 asection *s = NULL;
1759 bfd_vma relocation;
1760 bfd_reloc_status_type r;
1761
1762 /* Perform a relocation. */
1763
1764 howto = &alpha_howto_table[r_type];
1765
1766 if (r_extern)
1767 {
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)
1773 abort ();
1774 }
1775 else
1776 {
1777 if (r_symndx >= NUM_RELOC_SECTIONS)
1778 s = NULL;
1779 else
1780 s = symndx_to_section[r_symndx];
1781
1782 if (s == (asection *) NULL)
1783 abort ();
1784 }
1785
1786 if (info->relocateable)
1787 {
1788 /* We are generating relocateable output, and must
1789 convert the existing reloc. */
1790 if (r_extern)
1791 {
1792 if (h->root.type != bfd_link_hash_defined
1793 && h->root.type != bfd_link_hash_defweak
1794 && h->indx == -1)
1795 {
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)))
1800 return false;
1801 }
1802
1803 relocation = alpha_convert_external_reloc (output_bfd,
1804 info,
1805 input_bfd,
1806 ext_rel,
1807 h);
1808 }
1809 else
1810 {
1811 /* This is a relocation against a section. Adjust
1812 the value by the amount the section moved. */
1813 relocation = (s->output_section->vma
1814 + s->output_offset
1815 - s->vma);
1816 }
1817
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
1821 one. */
1822 if (howto->pc_relative)
1823 relocation -= (input_section->output_section->vma
1824 + input_section->output_offset
1825 - input_section->vma);
1826
1827 /* Put in any addend. */
1828 relocation += addend;
1829
1830 /* Adjust the contents. */
1831 r = _bfd_relocate_contents (howto, input_bfd, relocation,
1832 (contents
1833 + r_vaddr
1834 - input_section->vma));
1835 }
1836 else
1837 {
1838 /* We are producing a final executable. */
1839 if (r_extern)
1840 {
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)
1844 {
1845 asection *hsec;
1846
1847 hsec = h->root.u.def.section;
1848 relocation = (h->root.u.def.value
1849 + hsec->output_section->vma
1850 + hsec->output_offset);
1851 }
1852 else
1853 {
1854 if (! ((*info->callbacks->undefined_symbol)
1855 (info, h->root.root.string, input_bfd,
1856 input_section,
1857 r_vaddr - input_section->vma)))
1858 return false;
1859 relocation = 0;
1860 }
1861 }
1862 else
1863 {
1864 /* This is a reloc against a section. */
1865 relocation = (s->output_section->vma
1866 + s->output_offset
1867 - s->vma);
1868
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;
1873 }
1874
1875 r = _bfd_final_link_relocate (howto,
1876 input_bfd,
1877 input_section,
1878 contents,
1879 r_vaddr - input_section->vma,
1880 relocation,
1881 addend);
1882 }
1883
1884 if (r != bfd_reloc_ok)
1885 {
1886 switch (r)
1887 {
1888 default:
1889 case bfd_reloc_outofrange:
1890 abort ();
1891 case bfd_reloc_overflow:
1892 {
1893 const char *name;
1894
1895 if (r_extern)
1896 name = sym_hashes[r_symndx]->root.root.string;
1897 else
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)))
1904 return false;
1905 }
1906 break;
1907 }
1908 }
1909 }
1910
1911 if (info->relocateable && adjust_addrp)
1912 {
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
1918 + r_vaddr),
1919 (bfd_byte *) ext_rel->r_vaddr);
1920 }
1921
1922 if (gp_usedp && gp_undefined)
1923 {
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)))
1927 return false;
1928 /* Only give the error once per link. */
1929 ecoff_data (output_bfd)->gp = gp = 4;
1930 gp_undefined = false;
1931 }
1932 }
1933
1934 if (tos != 0)
1935 abort ();
1936
1937 return true;
1938 }
1939 \f
1940 /* Do final adjustments to the filehdr and the aouthdr. This routine
1941 sets the dynamic bits in the file header. */
1942
1943 /*ARGSUSED*/
1944 static boolean
1945 alpha_adjust_headers (abfd, fhdr, ahdr)
1946 bfd *abfd;
1947 struct internal_filehdr *fhdr;
1948 struct internal_aouthdr *ahdr;
1949 {
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;
1954 return true;
1955 }
1956 \f
1957 /* This is the ECOFF backend structure. The backend field of the
1958 target vector points to this. */
1959
1960 static const struct ecoff_backend_data alpha_ecoff_backend_data =
1961 {
1962 /* COFF backend structure. */
1963 {
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
1980 },
1981 /* Supported architecture. */
1982 bfd_arch_alpha,
1983 /* Initial portion of armap string. */
1984 "________64",
1985 /* The page boundary used to align sections in a demand-paged
1986 executable file. E.g., 0x1000. */
1987 0x2000,
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
1990 MIPS. */
1991 true,
1992 /* Bitsize of constructor entries. */
1993 64,
1994 /* Reloc to use for constructor entries. */
1995 &alpha_howto_table[ALPHA_R_REFQUAD],
1996 {
1997 /* Symbol table magic number. */
1998 magicSym2,
1999 /* Alignment of debugging information. E.g., 4. */
2000 8,
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. */
2011 ecoff_swap_hdr_in,
2012 ecoff_swap_dnr_in,
2013 ecoff_swap_pdr_in,
2014 ecoff_swap_sym_in,
2015 ecoff_swap_opt_in,
2016 ecoff_swap_fdr_in,
2017 ecoff_swap_rfd_in,
2018 ecoff_swap_ext_in,
2019 _bfd_ecoff_swap_tir_in,
2020 _bfd_ecoff_swap_rndx_in,
2021 /* Functions to swap out external symbolic data. */
2022 ecoff_swap_hdr_out,
2023 ecoff_swap_dnr_out,
2024 ecoff_swap_pdr_out,
2025 ecoff_swap_sym_out,
2026 ecoff_swap_opt_out,
2027 ecoff_swap_fdr_out,
2028 ecoff_swap_rfd_out,
2029 ecoff_swap_ext_out,
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
2034 },
2035 /* External reloc size. */
2036 RELSZ,
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
2047 };
2048
2049 /* Looking up a reloc type is Alpha specific. */
2050 #define _bfd_ecoff_bfd_reloc_type_lookup alpha_bfd_reloc_type_lookup
2051
2052 /* So is getting relocated section contents. */
2053 #define _bfd_ecoff_bfd_get_relocated_section_contents \
2054 alpha_ecoff_get_relocated_section_contents
2055
2056 /* Relaxing sections is generic. */
2057 #define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section
2058
2059 const bfd_target ecoffalpha_little_vec =
2060 {
2061 "ecoff-littlealpha", /* name */
2062 bfd_target_ecoff_flavour,
2063 false, /* data byte order is little */
2064 false, /* header byte order is little */
2065
2066 (HAS_RELOC | EXEC_P | /* object flags */
2067 HAS_LINENO | HAS_DEBUG |
2068 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
2069
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 */
2080
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},
2087
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),
2097
2098 (PTR) &alpha_ecoff_backend_data
2099 };
GDB Binutils - Deliverables
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