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* reloc.c (bfd_perform_relocation): Handle xcoff-powermac like
[deliverable/binutils-gdb.git] / bfd / coff-ppc.c
1 /* BFD back-end for PowerPC Microsoft Portable Executable files.
2 Copyright 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
3
4 Original version pieced together by Kim Knuttila (krk@cygnus.com)
5
6 There is nothing new under the sun. This file draws a lot on other
7 coff files, in particular, those for the rs/6000, alpha, mips, and
8 intel backends, and the PE work for the arm.
9
10 This file is part of BFD, the Binary File Descriptor library.
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
25
26 /* Current State:
27 - objdump works
28 - relocs generated by gas
29 - ld will link files, but they do not run.
30 - dlltool will not produce correct output in some .reloc cases, and will
31 not produce the right glue code for dll function calls.
32 */
33
34
35 #include "bfd.h"
36 #include "sysdep.h"
37
38 #include "libbfd.h"
39 #include "obstack.h"
40
41 #include "coff/powerpc.h"
42 #include "coff/internal.h"
43
44 #include "coff/pe.h"
45
46 #ifdef BADMAG
47 #undef BADMAG
48 #endif
49
50 #define BADMAG(x) PPCBADMAG(x)
51
52 #include "libcoff.h"
53
54 /* The toc is a set of bfd_vma fields. We use the fact that valid */
55 /* addresses are even (i.e. the bit representing "1" is off) to allow */
56 /* us to encode a little extra information in the field */
57 /* - Unallocated addresses are intialized to 1. */
58 /* - Allocated addresses are even numbers. */
59 /* The first time we actually write a reference to the toc in the bfd, */
60 /* we want to record that fact in a fixup file (if it is asked for), so */
61 /* we keep track of whether or not an address has been written by marking */
62 /* the low order bit with a "1" upon writing */
63
64 #define SET_UNALLOCATED(x) ((x) = 1)
65 #define IS_UNALLOCATED(x) ((x) == 1)
66
67 #define IS_WRITTEN(x) ((x) & 1)
68 #define MARK_AS_WRITTEN(x) ((x) |= 1)
69 #define MAKE_ADDR_AGAIN(x) ((x) &= ~1)
70
71 /* In order not to add an int to every hash table item for every coff
72 linker, we define our own hash table, derived from the coff one */
73
74 /* PE linker hash table entries. */
75
76 struct ppc_coff_link_hash_entry
77 {
78 struct coff_link_hash_entry root; /* First entry, as required */
79
80 /* As we wonder around the relocs, we'll keep the assigned toc_offset
81 here */
82 bfd_vma toc_offset; /* Our addition, as required */
83 int symbol_is_glue;
84 unsigned long int glue_insn;
85 char eye_catcher[8];
86 };
87
88 /* Need a 7 char string for an eye catcher */
89 #define EYE "krkjunk"
90
91 #define CHECK_EYE(addr) \
92 if (strcmp(addr, EYE) != 0) \
93 { \
94 fprintf(stderr,\
95 "File %s, line %d, Hash check failure, bad eye %8s\n", \
96 __FILE__, __LINE__, addr); \
97 abort(); \
98 }
99
100 /* PE linker hash table. */
101
102 struct ppc_coff_link_hash_table
103 {
104 struct coff_link_hash_table root; /* First entry, as required */
105 };
106
107 static struct bfd_hash_entry *ppc_coff_link_hash_newfunc
108 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,
109 const char *));
110
111 /* Routine to create an entry in the link hash table. */
112
113 static struct bfd_hash_entry *
114 ppc_coff_link_hash_newfunc (entry, table, string)
115 struct bfd_hash_entry *entry;
116 struct bfd_hash_table *table;
117 const char *string;
118 {
119 struct ppc_coff_link_hash_entry *ret =
120 (struct ppc_coff_link_hash_entry *) entry;
121
122 /* Allocate the structure if it has not already been allocated by a
123 subclass. */
124 if (ret == (struct ppc_coff_link_hash_entry *) NULL)
125 ret = (struct ppc_coff_link_hash_entry *)
126 bfd_hash_allocate (table,
127 sizeof (struct ppc_coff_link_hash_entry));
128
129 if (ret == (struct ppc_coff_link_hash_entry *) NULL)
130 return NULL;
131
132 /* Call the allocation method of the superclass. */
133 ret = ((struct ppc_coff_link_hash_entry *)
134 _bfd_coff_link_hash_newfunc ((struct bfd_hash_entry *) ret,
135 table, string));
136
137 if (ret)
138 {
139 /* Initialize the local fields. */
140 SET_UNALLOCATED(ret->toc_offset);
141 ret->symbol_is_glue = 0;
142 ret->glue_insn = 0;
143 strcpy(ret->eye_catcher, EYE);
144 }
145
146 return (struct bfd_hash_entry *) ret;
147 }
148
149 /* Initialize a PE linker hash table. */
150
151 static boolean
152 ppc_coff_link_hash_table_init (table, abfd, newfunc)
153 struct ppc_coff_link_hash_table *table;
154 bfd *abfd;
155 struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
156 struct bfd_hash_table *,
157 const char *));
158 {
159 return _bfd_coff_link_hash_table_init (&table->root, abfd, newfunc);
160 }
161
162 /* Create a PE linker hash table. */
163
164 static struct bfd_link_hash_table *
165 ppc_coff_link_hash_table_create (abfd)
166 bfd *abfd;
167 {
168 struct ppc_coff_link_hash_table *ret;
169
170 ret = ((struct ppc_coff_link_hash_table *)
171 bfd_alloc (abfd, sizeof (struct ppc_coff_link_hash_table)));
172 if (ret == NULL)
173 return NULL;
174 if (! ppc_coff_link_hash_table_init (ret, abfd,
175 ppc_coff_link_hash_newfunc))
176 {
177 bfd_release (abfd, ret);
178 return (struct bfd_link_hash_table *) NULL;
179 }
180 return &ret->root.root;
181 }
182
183 /* Now, tailor coffcode.h to use our hash stuff */
184
185 #define coff_bfd_link_hash_table_create ppc_coff_link_hash_table_create
186
187 \f
188 /* The nt loader points the toc register to &toc + 32768, in order to */
189 /* use the complete range of a 16-bit displacement (I guess). We have */
190 /* to adjust for this when we fix up loads displaced off the toc reg. */
191 #define TOC_LOAD_ADJUSTMENT (-32768)
192 #define TOC_SECTION_NAME ".private.toc"
193
194 /* The main body of code is in coffcode.h. */
195
196 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
197
198 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
199 from smaller values. Start with zero, widen, *then* decrement. */
200 #define MINUS_ONE (((bfd_vma)0) - 1)
201
202 /* these should definitely go in a header file somewhere... */
203
204 /* NOP */
205 #define IMAGE_REL_PPC_ABSOLUTE 0x0000
206
207 /* 64-bit address */
208 #define IMAGE_REL_PPC_ADDR64 0x0001
209
210 /* 32-bit address */
211 #define IMAGE_REL_PPC_ADDR32 0x0002
212
213 /* 26-bit address, shifted left 2 (branch absolute) */
214 #define IMAGE_REL_PPC_ADDR24 0x0003
215
216 /* 16-bit address */
217 #define IMAGE_REL_PPC_ADDR16 0x0004
218
219 /* 16-bit address, shifted left 2 (load doubleword) */
220 #define IMAGE_REL_PPC_ADDR14 0x0005
221
222 /* 26-bit PC-relative offset, shifted left 2 (branch relative) */
223 #define IMAGE_REL_PPC_REL24 0x0006
224
225 /* 16-bit PC-relative offset, shifted left 2 (br cond relative) */
226 #define IMAGE_REL_PPC_REL14 0x0007
227
228 /* 16-bit offset from TOC base */
229 #define IMAGE_REL_PPC_TOCREL16 0x0008
230
231 /* 16-bit offset from TOC base, shifted left 2 (load doubleword) */
232 #define IMAGE_REL_PPC_TOCREL14 0x0009
233
234 /* 32-bit addr w/o image base */
235 #define IMAGE_REL_PPC_ADDR32NB 0x000A
236
237 /* va of containing section (as in an image sectionhdr) */
238 #define IMAGE_REL_PPC_SECREL 0x000B
239
240 /* sectionheader number */
241 #define IMAGE_REL_PPC_SECTION 0x000C
242
243 /* substitute TOC restore instruction iff symbol is glue code */
244 #define IMAGE_REL_PPC_IFGLUE 0x000D
245
246 /* symbol is glue code; virtual address is TOC restore instruction */
247 #define IMAGE_REL_PPC_IMGLUE 0x000E
248
249 /* va of containing section (limited to 16 bits) */
250 #define IMAGE_REL_PPC_SECREL16 0x000F
251
252 /* stuff to handle immediate data when the number of bits in the */
253 /* data is greater than the number of bits in the immediate field */
254 /* We need to do (usually) 32 bit arithmetic on 16 bit chunks */
255 #define IMAGE_REL_PPC_REFHI 0x0010
256 #define IMAGE_REL_PPC_REFLO 0x0011
257 #define IMAGE_REL_PPC_PAIR 0x0012
258
259 /* This is essentially the same as tocrel16, with TOCDEFN assumed */
260 #define IMAGE_REL_PPC_TOCREL16_DEFN 0x0013
261
262 /* Flag bits in IMAGE_RELOCATION.TYPE */
263
264 /* subtract reloc value rather than adding it */
265 #define IMAGE_REL_PPC_NEG 0x0100
266
267 /* fix branch prediction bit to predict branch taken */
268 #define IMAGE_REL_PPC_BRTAKEN 0x0200
269
270 /* fix branch prediction bit to predict branch not taken */
271 #define IMAGE_REL_PPC_BRNTAKEN 0x0400
272
273 /* toc slot defined in file (or, data in toc) */
274 #define IMAGE_REL_PPC_TOCDEFN 0x0800
275
276 /* masks to isolate above values in IMAGE_RELOCATION.Type */
277 #define IMAGE_REL_PPC_TYPEMASK 0x00FF
278 #define IMAGE_REL_PPC_FLAGMASK 0x0F00
279
280 #define EXTRACT_TYPE(x) ((x) & IMAGE_REL_PPC_TYPEMASK)
281 #define EXTRACT_FLAGS(x) ((x) & IMAGE_REL_PPC_FLAGMASK)
282 #define EXTRACT_JUNK(x) \
283 ((x) & ~(IMAGE_REL_PPC_TYPEMASK | IMAGE_REL_PPC_FLAGMASK))
284
285 \f
286 /* static helper functions to make relocation work */
287 /* (Work In Progress) */
288
289 static bfd_reloc_status_type ppc_refhi_reloc PARAMS ((bfd *abfd,
290 arelent *reloc,
291 asymbol *symbol,
292 PTR data,
293 asection *section,
294 bfd *output_bfd,
295 char **error));
296 #if 0
297 static bfd_reloc_status_type ppc_reflo_reloc PARAMS ((bfd *abfd,
298 arelent *reloc,
299 asymbol *symbol,
300 PTR data,
301 asection *section,
302 bfd *output_bfd,
303 char **error));
304 #endif
305 static bfd_reloc_status_type ppc_pair_reloc PARAMS ((bfd *abfd,
306 arelent *reloc,
307 asymbol *symbol,
308 PTR data,
309 asection *section,
310 bfd *output_bfd,
311 char **error));
312
313 \f
314 static bfd_reloc_status_type ppc_toc16_reloc PARAMS ((bfd *abfd,
315 arelent *reloc,
316 asymbol *symbol,
317 PTR data,
318 asection *section,
319 bfd *output_bfd,
320 char **error));
321
322 #if 0
323 static bfd_reloc_status_type ppc_addr32nb_reloc PARAMS ((bfd *abfd,
324 arelent *reloc,
325 asymbol *symbol,
326 PTR data,
327 asection *section,
328 bfd *output_bfd,
329 char **error));
330 #endif
331 static bfd_reloc_status_type ppc_section_reloc PARAMS ((bfd *abfd,
332 arelent *reloc,
333 asymbol *symbol,
334 PTR data,
335 asection *section,
336 bfd *output_bfd,
337 char **error));
338
339 static bfd_reloc_status_type ppc_secrel_reloc PARAMS ((bfd *abfd,
340 arelent *reloc,
341 asymbol *symbol,
342 PTR data,
343 asection *section,
344 bfd *output_bfd,
345 char **error));
346
347 static bfd_reloc_status_type ppc_imglue_reloc PARAMS ((bfd *abfd,
348 arelent *reloc,
349 asymbol *symbol,
350 PTR data,
351 asection *section,
352 bfd *output_bfd,
353 char **error));
354
355
356
357 static boolean in_reloc_p PARAMS((bfd *abfd, reloc_howto_type *howto));
358
359 \f
360 /* FIXME: It'll take a while to get through all of these. I only need a few to
361 get us started, so those I'll make sure work. Those marked FIXME are either
362 completely unverified or have a specific unknown marked in the comment */
363
364 /*---------------------------------------------------------------------------*/
365 /* */
366 /* Relocation entries for Windows/NT on PowerPC. */
367 /* */
368 /* From the document "" we find the following listed as used relocs: */
369 /* */
370 /* ABSOLUTE : The noop */
371 /* ADDR[64|32|16] : fields that hold addresses in data fields or the */
372 /* 16 bit displacement field on a load/store. */
373 /* ADDR[24|14] : fields that hold addresses in branch and cond */
374 /* branches. These represent [26|16] bit addresses. */
375 /* The low order 2 bits are preserved. */
376 /* REL[24|14] : branches relative to the Instruction Address */
377 /* register. These represent [26|16] bit addresses, */
378 /* as before. The instruction field will be zero, and */
379 /* the address of the SYM will be inserted at link time. */
380 /* TOCREL16 : 16 bit displacement field referring to a slot in */
381 /* toc. */
382 /* TOCREL14 : 16 bit displacement field, similar to REL14 or ADDR14. */
383 /* ADDR32NB : 32 bit address relative to the virtual origin. */
384 /* (On the alpha, this is always a linker generated thunk)*/
385 /* (i.e. 32bit addr relative to the image base) */
386 /* SECREL : The value is relative to the start of the section */
387 /* containing the symbol. */
388 /* SECTION : access to the header containing the item. Supports the */
389 /* codeview debugger. */
390 /* */
391 /* In particular, note that the document does not indicate that the */
392 /* relocations listed in the header file are used. */
393 /* */
394 /* */
395 /* */
396 /*---------------------------------------------------------------------------*/
397
398 static reloc_howto_type ppc_coff_howto_table[] =
399 {
400 /* IMAGE_REL_PPC_ABSOLUTE 0x0000 NOP */
401 /* Unused: */
402 HOWTO (IMAGE_REL_PPC_ABSOLUTE, /* type */
403 0, /* rightshift */
404 0, /* size (0 = byte, 1 = short, 2 = long) */
405 0, /* bitsize */
406 false, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_dont, /* dont complain_on_overflow */
409 0, /* special_function */
410 "ABSOLUTE", /* name */
411 false, /* partial_inplace */
412 0x00, /* src_mask */
413 0x00, /* dst_mask */
414 false), /* pcrel_offset */
415
416 /* IMAGE_REL_PPC_ADDR64 0x0001 64-bit address */
417 /* Unused: */
418 HOWTO(IMAGE_REL_PPC_ADDR64, /* type */
419 0, /* rightshift */
420 3, /* size (0 = byte, 1 = short, 2 = long) */
421 64, /* bitsize */
422 false, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_bitfield, /* complain_on_overflow */
425 0, /* special_function */
426 "ADDR64", /* name */
427 true, /* partial_inplace */
428 MINUS_ONE, /* src_mask */
429 MINUS_ONE, /* dst_mask */
430 false), /* pcrel_offset */
431
432 /* IMAGE_REL_PPC_ADDR32 0x0002 32-bit address */
433 /* Used: */
434 HOWTO (IMAGE_REL_PPC_ADDR32, /* type */
435 0, /* rightshift */
436 2, /* size (0 = byte, 1 = short, 2 = long) */
437 32, /* bitsize */
438 false, /* pc_relative */
439 0, /* bitpos */
440 complain_overflow_bitfield, /* complain_on_overflow */
441 0, /* special_function */
442 "ADDR32", /* name */
443 true, /* partial_inplace */
444 0xffffffff, /* src_mask */
445 0xffffffff, /* dst_mask */
446 false), /* pcrel_offset */
447
448 /* IMAGE_REL_PPC_ADDR24 0x0003 26-bit address, shifted left 2 (branch absolute) */
449 /* the LI field is in bit 6 through bit 29 is 24 bits, + 2 for the shift */
450 /* Of course, That's the IBM approved bit numbering, which is not what */
451 /* anyone else uses.... The li field is in bit 2 thru 25 */
452 /* Used: */
453 HOWTO (IMAGE_REL_PPC_ADDR24, /* type */
454 0, /* rightshift */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
456 26, /* bitsize */
457 false, /* pc_relative */
458 0, /* bitpos */
459 complain_overflow_bitfield, /* complain_on_overflow */
460 0, /* special_function */
461 "ADDR24", /* name */
462 true, /* partial_inplace */
463 0x07fffffc, /* src_mask */
464 0x07fffffc, /* dst_mask */
465 false), /* pcrel_offset */
466
467 /* IMAGE_REL_PPC_ADDR16 0x0004 16-bit address */
468 /* Used: */
469 HOWTO (IMAGE_REL_PPC_ADDR16, /* type */
470 0, /* rightshift */
471 1, /* size (0 = byte, 1 = short, 2 = long) */
472 16, /* bitsize */
473 false, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_signed, /* complain_on_overflow */
476 0, /* special_function */
477 "ADDR16", /* name */
478 true, /* partial_inplace */
479 0xffff, /* src_mask */
480 0xffff, /* dst_mask */
481 false), /* pcrel_offset */
482
483 /* IMAGE_REL_PPC_ADDR14 0x0005 */
484 /* 16-bit address, shifted left 2 (load doubleword) */
485 /* FIXME: the mask is likely wrong, and the bit position may be as well */
486 /* Unused: */
487 HOWTO (IMAGE_REL_PPC_ADDR14, /* type */
488 1, /* rightshift */
489 1, /* size (0 = byte, 1 = short, 2 = long) */
490 16, /* bitsize */
491 false, /* pc_relative */
492 0, /* bitpos */
493 complain_overflow_signed, /* complain_on_overflow */
494 0, /* special_function */
495 "ADDR16", /* name */
496 true, /* partial_inplace */
497 0xffff, /* src_mask */
498 0xffff, /* dst_mask */
499 false), /* pcrel_offset */
500
501 /* IMAGE_REL_PPC_REL24 0x0006 */
502 /* 26-bit PC-relative offset, shifted left 2 (branch relative) */
503 /* Used: */
504 HOWTO (IMAGE_REL_PPC_REL24, /* type */
505 0, /* rightshift */
506 2, /* size (0 = byte, 1 = short, 2 = long) */
507 26, /* bitsize */
508 true, /* pc_relative */
509 0, /* bitpos */
510 complain_overflow_signed, /* complain_on_overflow */
511 0, /* special_function */
512 "REL24", /* name */
513 true, /* partial_inplace */
514 0x3fffffc, /* src_mask */
515 0x3fffffc, /* dst_mask */
516 false), /* pcrel_offset */
517
518 /* IMAGE_REL_PPC_REL14 0x0007 */
519 /* 16-bit PC-relative offset, shifted left 2 (br cond relative) */
520 /* FIXME: the mask is likely wrong, and the bit position may be as well */
521 /* FIXME: how does it know how far to shift? */
522 /* Unused: */
523 HOWTO (IMAGE_REL_PPC_ADDR14, /* type */
524 1, /* rightshift */
525 1, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 false, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_signed, /* complain_on_overflow */
530 0, /* special_function */
531 "ADDR16", /* name */
532 true, /* partial_inplace */
533 0xffff, /* src_mask */
534 0xffff, /* dst_mask */
535 true), /* pcrel_offset */
536
537 /* IMAGE_REL_PPC_TOCREL16 0x0008 */
538 /* 16-bit offset from TOC base */
539 /* Used: */
540 HOWTO (IMAGE_REL_PPC_TOCREL16,/* type */
541 0, /* rightshift */
542 1, /* size (0 = byte, 1 = short, 2 = long) */
543 16, /* bitsize */
544 false, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 ppc_toc16_reloc, /* special_function */
548 "TOCREL16", /* name */
549 false, /* partial_inplace */
550 0xffff, /* src_mask */
551 0xffff, /* dst_mask */
552 false), /* pcrel_offset */
553
554 /* IMAGE_REL_PPC_TOCREL14 0x0009 */
555 /* 16-bit offset from TOC base, shifted left 2 (load doubleword) */
556 /* Unused: */
557 HOWTO (IMAGE_REL_PPC_TOCREL14,/* type */
558 1, /* rightshift */
559 1, /* size (0 = byte, 1 = short, 2 = long) */
560 16, /* bitsize */
561 false, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_signed, /* complain_on_overflow */
564 0, /* special_function */
565 "TOCREL14", /* name */
566 false, /* partial_inplace */
567 0xffff, /* src_mask */
568 0xffff, /* dst_mask */
569 false), /* pcrel_offset */
570
571 /* IMAGE_REL_PPC_ADDR32NB 0x000A */
572 /* 32-bit addr w/ image base */
573 /* Unused: */
574 HOWTO (IMAGE_REL_PPC_ADDR32NB,/* type */
575 0, /* rightshift */
576 2, /* size (0 = byte, 1 = short, 2 = long) */
577 32, /* bitsize */
578 false, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_signed, /* complain_on_overflow */
581 0, /* special_function */
582 "ADDR32NB", /* name */
583 true, /* partial_inplace */
584 0xffffffff, /* src_mask */
585 0xffffffff, /* dst_mask */
586 false), /* pcrel_offset */
587
588 /* IMAGE_REL_PPC_SECREL 0x000B */
589 /* va of containing section (as in an image sectionhdr) */
590 /* Unused: */
591 HOWTO (IMAGE_REL_PPC_SECREL,/* type */
592 0, /* rightshift */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
594 32, /* bitsize */
595 false, /* pc_relative */
596 0, /* bitpos */
597 complain_overflow_signed, /* complain_on_overflow */
598 ppc_secrel_reloc, /* special_function */
599 "SECREL", /* name */
600 true, /* partial_inplace */
601 0xffffffff, /* src_mask */
602 0xffffffff, /* dst_mask */
603 true), /* pcrel_offset */
604
605 /* IMAGE_REL_PPC_SECTION 0x000C */
606 /* sectionheader number */
607 /* Unused: */
608 HOWTO (IMAGE_REL_PPC_SECTION,/* type */
609 0, /* rightshift */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
611 32, /* bitsize */
612 false, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_signed, /* complain_on_overflow */
615 ppc_section_reloc, /* special_function */
616 "SECTION", /* name */
617 true, /* partial_inplace */
618 0xffffffff, /* src_mask */
619 0xffffffff, /* dst_mask */
620 true), /* pcrel_offset */
621
622 /* IMAGE_REL_PPC_IFGLUE 0x000D */
623 /* substitute TOC restore instruction iff symbol is glue code */
624 /* Used: */
625 HOWTO (IMAGE_REL_PPC_IFGLUE,/* type */
626 0, /* rightshift */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
628 32, /* bitsize */
629 false, /* pc_relative */
630 0, /* bitpos */
631 complain_overflow_signed, /* complain_on_overflow */
632 0, /* special_function */
633 "IFGLUE", /* name */
634 true, /* partial_inplace */
635 0xffffffff, /* src_mask */
636 0xffffffff, /* dst_mask */
637 false), /* pcrel_offset */
638
639 /* IMAGE_REL_PPC_IMGLUE 0x000E */
640 /* symbol is glue code; virtual address is TOC restore instruction */
641 /* Unused: */
642 HOWTO (IMAGE_REL_PPC_IMGLUE,/* type */
643 0, /* rightshift */
644 2, /* size (0 = byte, 1 = short, 2 = long) */
645 32, /* bitsize */
646 false, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_dont, /* complain_on_overflow */
649 ppc_imglue_reloc, /* special_function */
650 "IMGLUE", /* name */
651 false, /* partial_inplace */
652 0xffffffff, /* src_mask */
653 0xffffffff, /* dst_mask */
654 false), /* pcrel_offset */
655
656 /* IMAGE_REL_PPC_SECREL16 0x000F */
657 /* va of containing section (limited to 16 bits) */
658 /* Unused: */
659 HOWTO (IMAGE_REL_PPC_SECREL16,/* type */
660 0, /* rightshift */
661 1, /* size (0 = byte, 1 = short, 2 = long) */
662 16, /* bitsize */
663 false, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_signed, /* complain_on_overflow */
666 0, /* special_function */
667 "SECREL16", /* name */
668 true, /* partial_inplace */
669 0xffff, /* src_mask */
670 0xffff, /* dst_mask */
671 true), /* pcrel_offset */
672
673 /* IMAGE_REL_PPC_REFHI 0x0010 */
674 /* Unused: */
675 HOWTO (IMAGE_REL_PPC_REFHI, /* type */
676 0, /* rightshift */
677 1, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 false, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_signed, /* complain_on_overflow */
682 ppc_refhi_reloc, /* special_function */
683 "REFHI", /* name */
684 true, /* partial_inplace */
685 0xffffffff, /* src_mask */
686 0xffffffff, /* dst_mask */
687 false), /* pcrel_offset */
688
689 /* IMAGE_REL_PPC_REFLO 0x0011 */
690 /* Unused: */
691 HOWTO (IMAGE_REL_PPC_REFLO, /* type */
692 0, /* rightshift */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
694 16, /* bitsize */
695 false, /* pc_relative */
696 0, /* bitpos */
697 complain_overflow_signed, /* complain_on_overflow */
698 ppc_refhi_reloc, /* special_function */
699 "REFLO", /* name */
700 true, /* partial_inplace */
701 0xffffffff, /* src_mask */
702 0xffffffff, /* dst_mask */
703 false), /* pcrel_offset */
704
705 /* IMAGE_REL_PPC_PAIR 0x0012 */
706 /* Unused: */
707 HOWTO (IMAGE_REL_PPC_PAIR, /* type */
708 0, /* rightshift */
709 1, /* size (0 = byte, 1 = short, 2 = long) */
710 16, /* bitsize */
711 false, /* pc_relative */
712 0, /* bitpos */
713 complain_overflow_signed, /* complain_on_overflow */
714 ppc_pair_reloc, /* special_function */
715 "PAIR", /* name */
716 true, /* partial_inplace */
717 0xffffffff, /* src_mask */
718 0xffffffff, /* dst_mask */
719 false), /* pcrel_offset */
720
721 /* IMAGE_REL_PPC_TOCREL16_DEFN 0x0013 */
722 /* 16-bit offset from TOC base, without causing a definition */
723 /* Used: */
724 HOWTO ( (IMAGE_REL_PPC_TOCREL16 | IMAGE_REL_PPC_TOCDEFN), /* type */
725 0, /* rightshift */
726 1, /* size (0 = byte, 1 = short, 2 = long) */
727 16, /* bitsize */
728 false, /* pc_relative */
729 0, /* bitpos */
730 complain_overflow_dont, /* complain_on_overflow */
731 0, /* special_function */
732 "TOCREL16, TOCDEFN", /* name */
733 false, /* partial_inplace */
734 0xffff, /* src_mask */
735 0xffff, /* dst_mask */
736 false), /* pcrel_offset */
737
738 };
739
740
741 \f
742
743 /* Some really cheezy macros that can be turned on to test stderr :-) */
744
745 #ifdef DEBUG_RELOC
746 #define UN_IMPL(x) \
747 { \
748 static int i; \
749 if (i == 0) \
750 { \
751 i = 1; \
752 fprintf(stderr,"Unimplemented Relocation -- %s\n",x); \
753 } \
754 }
755
756 #define DUMP_RELOC(n,r) \
757 { \
758 fprintf(stderr,"%s sym %d, addr %d, addend %d\n", \
759 n, (*(r->sym_ptr_ptr))->name, \
760 r->address, r->addend); \
761 }
762
763 /* Given a reloc name, n, and a pointer to an internal_reloc,
764 dump out interesting information on the contents
765
766 #define n_name _n._n_name
767 #define n_zeroes _n._n_n._n_zeroes
768 #define n_offset _n._n_n._n_offset
769
770 */
771
772 #define DUMP_RELOC2(n,r) \
773 { \
774 fprintf(stderr,"%s sym %d, r_vaddr %d %s\n", \
775 n, r->r_symndx, r->r_vaddr,\
776 (((r->r_type) & IMAGE_REL_PPC_TOCDEFN) == 0) \
777 ?" ":" TOCDEFN" ); \
778 }
779
780 #else
781 #define UN_IMPL(x)
782 #define DUMP_RELOC(n,r)
783 #define DUMP_RELOC2(n,r)
784 #endif
785
786
787 \f
788 /* toc construction and management routines */
789 extern bfd* bfd_of_toc_owner;
790 extern long int global_toc_size;
791
792 extern long int import_table_size;
793 extern long int first_thunk_address;
794 extern long int thunk_size;
795
796 enum toc_type
797 {
798 default_toc,
799 toc_32,
800 toc_64
801 };
802
803 enum ref_category
804 {
805 priv,
806 pub,
807 data
808 };
809
810 struct list_ele
811 {
812 struct list_ele *next;
813 bfd_vma addr;
814 enum ref_category cat;
815 int offset;
816 const char *name;
817 };
818
819 extern struct list_ele *head;
820 extern struct list_ele *tail;
821
822 static void
823 record_toc(toc_section, our_toc_offset, cat, name)
824 asection *toc_section;
825 int our_toc_offset;
826 enum ref_category cat;
827 const char *name;
828 {
829 /* add this entry to our toc addr-offset-name list */
830 struct list_ele *t;
831 t = (struct list_ele *) bfd_malloc (sizeof (struct list_ele));
832 if (t == NULL)
833 abort ();
834 t->next = 0;
835 t->offset = our_toc_offset;
836 t->name = name;
837 t->cat = cat;
838 t->addr = toc_section->output_offset + our_toc_offset;
839
840 if (head == 0)
841 {
842 head = t;
843 tail = t;
844 }
845 else
846 {
847 tail->next = t;
848 tail = t;
849 }
850 }
851
852 #ifdef COFF_IMAGE_WITH_PE
853
854 /* record a toc offset against a symbol */
855 static int
856 ppc_record_toc_entry(abfd, info, sec, sym, toc_kind)
857 bfd *abfd;
858 struct bfd_link_info *info;
859 asection *sec;
860 int sym;
861 enum toc_type toc_kind;
862 {
863 struct ppc_coff_link_hash_entry *h;
864 int ret_val;
865 const char *name;
866
867 int *local_syms;
868
869 h = 0;
870
871 h = (struct ppc_coff_link_hash_entry *) (obj_coff_sym_hashes (abfd)[sym]);
872 if (h != 0)
873 {
874 CHECK_EYE(h->eye_catcher);
875 }
876
877 if (h == 0)
878 {
879 local_syms = obj_coff_local_toc_table(abfd);
880 if (local_syms == 0)
881 {
882 int i;
883 /* allocate a table */
884 local_syms =
885 (int *) bfd_zalloc (abfd,
886 obj_raw_syment_count(abfd) * sizeof(int));
887 if (local_syms == 0)
888 return false;
889 obj_coff_local_toc_table(abfd) = local_syms;
890 for (i = 0; i < obj_raw_syment_count(abfd); ++i)
891 {
892 SET_UNALLOCATED(local_syms[i]);
893 }
894 }
895
896 if (IS_UNALLOCATED(local_syms[sym]))
897 {
898 local_syms[sym] = global_toc_size;
899 ret_val = global_toc_size;
900 global_toc_size += 4;
901
902 /* The size must fit in a 16bit displacment */
903 if (global_toc_size >= 65535)
904 {
905 fprintf(stderr,
906 "Exceeded toc size of 65535\n");
907 abort();
908 }
909
910 #ifdef TOC_DEBUG
911 fprintf(stderr,
912 "Setting toc_offset for local sym %d to %d\n",
913 sym, ret_val);
914 #endif
915 }
916 else
917 {
918 ret_val = local_syms[sym];
919 #ifdef TOC_DEBUG
920 fprintf(stderr,
921 "toc_offset already set for local sym %d to %d\n",
922 sym, ret_val);
923 #endif
924 }
925 }
926 else
927 {
928 name = h->root.root.root.string;
929
930 /* check to see if there's a toc slot allocated. If not, do it
931 here. It will be used in relocate_section */
932 if (IS_UNALLOCATED(h->toc_offset))
933 {
934 h->toc_offset = global_toc_size;
935 ret_val = global_toc_size;
936 global_toc_size += 4;
937
938 /* The size must fit in a 16bit displacment */
939 if (global_toc_size >= 65535)
940 {
941 fprintf(stderr,
942 "Exceeded toc size of 65535\n");
943 abort();
944 }
945
946 #ifdef TOC_DEBUG
947 fprintf(stderr,
948 "Setting toc_offset for sym %d (%s) [h=%p] to %d\n",
949 sym, name, h, ret_val);
950 #endif
951 }
952 else
953 {
954 ret_val = h->toc_offset;
955 #ifdef TOC_DEBUG
956 fprintf(stderr,
957 "toc_offset already set for sym %d (%s) [h=%p] to %d\n",
958 sym, name, h, ret_val);
959 #endif
960 }
961 }
962
963 return ret_val;
964 }
965
966 #endif /* COFF_IMAGE_WITH_PE */
967
968 #if 0
969
970 /* FIXME: record a toc offset against a data-in-toc symbol */
971 /* Now, there is currenly some confusion on what this means. In some
972 compilers one sees the moral equivalent of:
973 .tocd
974 define some data
975 .text
976 refer to the data with a [tocv] qualifier
977 In general, one sees something to indicate that a tocd has been
978 seen, and that would trigger the allocation of data in toc. The IBM
979 docs seem to suggest that anything with the TOCDEFN qualifier should
980 never trigger storage allocation. However, in the kernel32.lib that
981 we've been using for our test bed, there are a couple of variables
982 referenced that fail that test.
983
984 So it can't work that way.
985 */
986 static int
987 ppc_record_data_in_toc_entry(abfd, info, sec, sym, toc_kind)
988 bfd *abfd;
989 struct bfd_link_info *info;
990 asection *sec;
991 int sym;
992 enum toc_type toc_kind;
993 {
994 struct ppc_coff_link_hash_entry *h = 0;
995 int ret_val;
996 const char *name;
997
998 int *local_syms;
999
1000 h = (struct ppc_coff_link_hash_entry *) (obj_coff_sym_hashes (abfd)[sym]);
1001
1002 if (h == 0)
1003 {
1004 local_syms = obj_coff_local_toc_table(abfd);
1005 if (local_syms == 0)
1006 {
1007 int i;
1008 /* allocate a table */
1009 local_syms =
1010 (int *) bfd_zalloc (abfd,
1011 obj_raw_syment_count(abfd) * sizeof(int));
1012 if (local_syms == 0)
1013 return false;
1014 obj_coff_local_toc_table(abfd) = local_syms;
1015 for (i = 0; i < obj_raw_syment_count(abfd); ++i)
1016 {
1017 SET_UNALLOCATED(local_syms[i]);
1018 }
1019 }
1020
1021 if (IS_UNALLOCATED(local_syms[sym]))
1022 {
1023 local_syms[sym] = global_toc_size;
1024 ret_val = global_toc_size;
1025 global_toc_size += 4;
1026 #ifdef TOC_DEBUG
1027 fprintf(stderr,
1028 "Setting data_in_toc_offset for local sym %d to %d\n",
1029 sym, ret_val);
1030 #endif
1031 }
1032 else
1033 {
1034 ret_val = local_syms[sym];
1035 #ifdef TOC_DEBUG
1036 fprintf(stderr,
1037 "data_in_toc_offset already set for local sym %d to %d\n",
1038 sym, ret_val);
1039 #endif
1040 }
1041 }
1042 else
1043 {
1044 CHECK_EYE(h->eye_catcher);
1045
1046 name = h->root.root.root.string;
1047
1048 /* check to see if there's a toc slot allocated. If not, do it
1049 here. It will be used in relocate_section */
1050 if (IS_UNALLOCATED(h->toc_offset))
1051 {
1052 #if 0
1053 h->toc_offset = global_toc_size;
1054 #endif
1055 ret_val = global_toc_size;
1056 /* We're allocating a chunk of the toc, as opposed to a slot */
1057 /* FIXME: alignment? */
1058
1059 global_toc_size += 4;
1060 #ifdef TOC_DEBUG
1061 fprintf(stderr,
1062 "Setting data_in_toc_offset for sym %d (%s) [h=%p] to %d\n",
1063 sym, name, h, ret_val);
1064 #endif
1065 }
1066 else
1067 {
1068 ret_val = h->toc_offset;
1069 #ifdef TOC_DEBUG
1070 fprintf(stderr,
1071 "data_in_toc_offset already set for sym %d (%s) [h=%p] to %d\n",
1072 sym, name, h, ret_val);
1073 #endif
1074 }
1075 }
1076
1077 return ret_val;
1078 }
1079
1080 #endif /* 0 */
1081
1082 #ifdef COFF_IMAGE_WITH_PE
1083
1084 /* record a toc offset against a symbol */
1085 static void
1086 ppc_mark_symbol_as_glue(abfd, sym, rel)
1087 bfd *abfd;
1088 int sym;
1089 struct internal_reloc *rel;
1090 {
1091 struct ppc_coff_link_hash_entry *h;
1092
1093 h = (struct ppc_coff_link_hash_entry *) (obj_coff_sym_hashes (abfd)[sym]);
1094
1095 CHECK_EYE(h->eye_catcher);
1096
1097 h->symbol_is_glue = 1;
1098 h->glue_insn = bfd_get_32 (abfd, (bfd_byte *) &rel->r_vaddr);
1099
1100 return;
1101 }
1102
1103 #endif /* COFF_IMAGE_WITH_PE */
1104 \f
1105 #if 0
1106
1107 /* Provided the symbol, returns the value reffed */
1108 static long get_symbol_value PARAMS ((asymbol *));
1109
1110 static long
1111 get_symbol_value (symbol)
1112 asymbol *symbol;
1113 {
1114 long relocation = 0;
1115
1116 if (bfd_is_com_section (symbol->section))
1117 {
1118 relocation = 0;
1119 }
1120 else
1121 {
1122 relocation = symbol->value +
1123 symbol->section->output_section->vma +
1124 symbol->section->output_offset;
1125 }
1126
1127 return(relocation);
1128 }
1129
1130 #endif /* 0 */
1131
1132 /* Return true if this relocation should
1133 appear in the output .reloc section. */
1134
1135 static boolean in_reloc_p(abfd, howto)
1136 bfd * abfd;
1137 reloc_howto_type *howto;
1138 {
1139 return
1140 (! howto->pc_relative)
1141 && (howto->type != IMAGE_REL_PPC_ADDR32NB)
1142 && (howto->type != IMAGE_REL_PPC_TOCREL16)
1143 && (howto->type != IMAGE_REL_PPC_IMGLUE)
1144 && (howto->type != IMAGE_REL_PPC_IFGLUE)
1145 && (howto->type != IMAGE_REL_PPC_SECREL)
1146 && (howto->type != IMAGE_REL_PPC_SECTION)
1147 && (howto->type != IMAGE_REL_PPC_SECREL16)
1148 && (howto->type != IMAGE_REL_PPC_REFHI)
1149 && (howto->type != IMAGE_REL_PPC_REFLO)
1150 && (howto->type != IMAGE_REL_PPC_PAIR)
1151 && (howto->type != IMAGE_REL_PPC_TOCREL16_DEFN) ;
1152 }
1153
1154 #if 0
1155
1156 /* this function is in charge of performing all the ppc PE relocations */
1157 /* Don't yet know if we want to do this this particular way ... (krk) */
1158 /* FIXME: (it is not yet enabled) */
1159
1160 static bfd_reloc_status_type
1161 pe_ppc_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
1162 error_message)
1163 bfd *abfd;
1164 arelent *reloc_entry;
1165 asymbol *symbol_in;
1166 PTR data;
1167 asection *input_section;
1168 bfd *output_bfd;
1169 char **error_message;
1170 {
1171 /* the consth relocation comes in two parts, we have to remember
1172 the state between calls, in these variables */
1173 static boolean part1_consth_active = false;
1174 static unsigned long part1_consth_value;
1175
1176 unsigned long sym_value;
1177 unsigned short r_type;
1178 unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
1179
1180 fprintf(stderr, "pe_ppc_reloc (%s)\n", TARGET_LITTLE_NAME);
1181
1182 r_type = reloc_entry->howto->type;
1183
1184 if (output_bfd)
1185 {
1186 /* Partial linking - do nothing */
1187 reloc_entry->address += input_section->output_offset;
1188 return bfd_reloc_ok;
1189 }
1190
1191 if (symbol_in != NULL
1192 && bfd_is_und_section (symbol_in->section))
1193 {
1194 /* Keep the state machine happy in case we're called again */
1195 if (r_type == IMAGE_REL_PPC_REFHI)
1196 {
1197 part1_consth_active = true;
1198 part1_consth_value = 0;
1199 }
1200 return(bfd_reloc_undefined);
1201 }
1202
1203 if ((part1_consth_active) && (r_type != IMAGE_REL_PPC_PAIR))
1204 {
1205 part1_consth_active = false;
1206 *error_message = (char *) "Missing PAIR";
1207 return(bfd_reloc_dangerous);
1208 }
1209
1210
1211 sym_value = get_symbol_value(symbol_in);
1212
1213 return(bfd_reloc_ok);
1214 }
1215
1216 #endif /* 0 */
1217
1218 /* The reloc processing routine for the optimized COFF linker. */
1219
1220 static boolean
1221 coff_ppc_relocate_section (output_bfd, info, input_bfd, input_section,
1222 contents, relocs, syms, sections)
1223 bfd *output_bfd;
1224 struct bfd_link_info *info;
1225 bfd *input_bfd;
1226 asection *input_section;
1227 bfd_byte *contents;
1228 struct internal_reloc *relocs;
1229 struct internal_syment *syms;
1230 asection **sections;
1231 {
1232 struct internal_reloc *rel;
1233 struct internal_reloc *relend;
1234 boolean hihalf;
1235 bfd_vma hihalf_val;
1236 asection *toc_section = 0;
1237 bfd_vma relocation;
1238 reloc_howto_type *howto = 0;
1239
1240 #ifdef DEBUG_RELOC
1241 fprintf(stderr,
1242 "pe_ppc_relocate_section (%s) for %s in bfd %s\n",
1243 TARGET_LITTLE_NAME,
1244 input_section->name,
1245 input_bfd->filename);
1246
1247 #endif
1248
1249 /* If we are performing a relocateable link, we don't need to do a
1250 thing. The caller will take care of adjusting the reloc
1251 addresses and symbol indices. */
1252 if (info->relocateable)
1253 return true;
1254
1255 hihalf = false;
1256 hihalf_val = 0;
1257
1258 rel = relocs;
1259 relend = rel + input_section->reloc_count;
1260 for (; rel < relend; rel++)
1261 {
1262 long symndx;
1263 struct ppc_coff_link_hash_entry *h;
1264 struct internal_syment *sym;
1265 bfd_vma val;
1266
1267 asection *sec;
1268 bfd_reloc_status_type rstat;
1269 bfd_byte *loc;
1270
1271 unsigned short r_type = EXTRACT_TYPE (rel->r_type);
1272 unsigned short r_flags = EXTRACT_FLAGS(rel->r_type);
1273
1274 #ifdef DEBUG_RELOC
1275 /* now examine flags */
1276 if (r_flags != 0)
1277 {
1278 fprintf (stderr, "Reloc with flags found!");
1279 if ( r_flags & IMAGE_REL_PPC_NEG )
1280 fprintf (stderr, " NEG");
1281 if ( r_flags & IMAGE_REL_PPC_BRTAKEN )
1282 fprintf (stderr, " BRTAKEN");
1283 if ( r_flags & IMAGE_REL_PPC_BRNTAKEN )
1284 fprintf (stderr, " BRNTAKEN");
1285 if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
1286 fprintf (stderr, " TOCDEFN");
1287 fprintf(stderr, "\n");
1288 }
1289 #endif
1290
1291 symndx = rel->r_symndx;
1292 loc = contents + rel->r_vaddr - input_section->vma;
1293
1294 /* FIXME: check bounds on r_type */
1295 howto = ppc_coff_howto_table + r_type;
1296
1297 if (symndx == -1)
1298 {
1299 h = NULL;
1300 sym = NULL;
1301 }
1302 else
1303 {
1304 h = (struct ppc_coff_link_hash_entry *)
1305 (obj_coff_sym_hashes (input_bfd)[symndx]);
1306 if (h != 0)
1307 {
1308 CHECK_EYE(h->eye_catcher);
1309 }
1310
1311 sym = syms + symndx;
1312 }
1313
1314 sec = NULL;
1315 val = 0;
1316
1317 /* FIXME: PAIR unsupported in the following code */
1318 if (h == NULL)
1319 {
1320 if (symndx == -1)
1321 sec = bfd_abs_section_ptr;
1322 else
1323 {
1324 sec = sections[symndx];
1325 val = (sec->output_section->vma
1326 + sec->output_offset
1327 + sym->n_value
1328 - sec->vma);
1329 }
1330 }
1331 else
1332 {
1333 CHECK_EYE(h->eye_catcher);
1334
1335 if (h->root.root.type == bfd_link_hash_defined
1336 || h->root.root.type == bfd_link_hash_defweak)
1337 {
1338 sec = h->root.root.u.def.section;
1339 val = (h->root.root.u.def.value
1340 + sec->output_section->vma
1341 + sec->output_offset);
1342 }
1343 else
1344 {
1345 fprintf(stderr,
1346 "missing %s\n",h->root.root.root.string);
1347 if (! ((*info->callbacks->undefined_symbol)
1348 (info, h->root.root.root.string, input_bfd, input_section,
1349 rel->r_vaddr - input_section->vma)))
1350 return false;
1351 }
1352 }
1353
1354 rstat = bfd_reloc_ok;
1355
1356 /* Each case must do its own relocation, setting rstat appropriately */
1357 switch (r_type)
1358 {
1359 default:
1360 fprintf( stderr,
1361 "ERROR: during reloc processing -- unsupported reloc %s\n",
1362 howto->name);
1363 bfd_set_error (bfd_error_bad_value);
1364 abort();
1365 return false;
1366 case IMAGE_REL_PPC_TOCREL16:
1367 {
1368 bfd_vma our_toc_offset;
1369 int fixit;
1370
1371 DUMP_RELOC2(howto->name, rel);
1372
1373 if (toc_section == 0)
1374 {
1375 toc_section = bfd_get_section_by_name (bfd_of_toc_owner,
1376 TOC_SECTION_NAME);
1377 #ifdef TOC_DEBUG
1378
1379 fprintf(stderr,
1380 "BFD of toc owner %p (%s), section addr of %s %p\n",
1381 bfd_of_toc_owner, bfd_of_toc_owner->filename,
1382 TOC_SECTION_NAME, toc_section);
1383 #endif
1384
1385 if ( toc_section == NULL )
1386 {
1387 fprintf(stderr, "No Toc section!\n");
1388 abort();
1389 }
1390 }
1391
1392 /*
1393 * Amazing bit tricks present. As we may have seen earlier, we
1394 * use the 1 bit to tell us whether or not a toc offset has been
1395 * allocated. Now that they've all been allocated, we will use
1396 * the 1 bit to tell us if we've written this particular toc
1397 * entry out.
1398 */
1399 fixit = false;
1400 if (h == 0)
1401 { /* it is a file local symbol */
1402 int *local_toc_table;
1403 const char *name;
1404
1405 sym = syms + symndx;
1406 name = sym->_n._n_name;
1407
1408 local_toc_table = obj_coff_local_toc_table(input_bfd);
1409 our_toc_offset = local_toc_table[symndx];
1410
1411 if (IS_WRITTEN(our_toc_offset))
1412 {
1413 /* if it has been written out, it is marked with the
1414 1 bit. Fix up our offset, but do not write it out
1415 again.
1416 */
1417 MAKE_ADDR_AGAIN(our_toc_offset);
1418 #ifdef TOC_DEBUG
1419
1420 fprintf(stderr,
1421 "Not writing out toc_offset of %d for %s\n",
1422 our_toc_offset, name);
1423 #endif
1424 }
1425 else
1426 {
1427 /* write out the toc entry */
1428 record_toc(toc_section, our_toc_offset, priv, strdup(name));
1429 #ifdef TOC_DEBUG
1430 fprintf(stderr,
1431 "Writing out toc_offset "
1432 "toc_section (%p,%p)+%d val %d for %s\n",
1433 toc_section,
1434 toc_section->contents,
1435 our_toc_offset,
1436 val,
1437 name);
1438 #endif
1439
1440 bfd_put_32(output_bfd,
1441 val,
1442 toc_section->contents + our_toc_offset);
1443
1444 MARK_AS_WRITTEN(local_toc_table[symndx]);
1445 fixit = true;
1446 }
1447 }
1448 else
1449 {
1450 const char *name = h->root.root.root.string;
1451 our_toc_offset = h->toc_offset;
1452
1453 if ((r_flags & IMAGE_REL_PPC_TOCDEFN)
1454 == IMAGE_REL_PPC_TOCDEFN )
1455 #if 0
1456 /* This is wrong. If tocdefn is on, we must unconditionally
1457 assume the following path */
1458 && IS_UNALLOCATED(our_toc_offset))
1459 #endif
1460 {
1461 /* This is unbelievable cheese. Some knowledgable asm
1462 hacker has decided to use r2 as a base for loading
1463 a value. He/She does this by setting the tocdefn bit,
1464 and not supplying a toc definition. The behaviour is
1465 then to use the difference between the value of the
1466 symbol and the actual location of the toc as the toc
1467 index.
1468
1469 In fact, what is usually happening is, because the
1470 Import Address Table is mapped immediately following
1471 the toc, some trippy library code trying for speed on
1472 dll linkage, takes advantage of that and considers
1473 the IAT to be part of the toc, thus saving a load.
1474 */
1475 #ifdef DEBUG_RELOC
1476 fprintf(stderr,
1477 "TOCDEFN is on, (%s) (%p) our_toc_offset = %x\n",
1478 name, h, our_toc_offset);
1479 #endif
1480
1481 our_toc_offset = val -
1482 (toc_section->output_section->vma +
1483 toc_section->output_offset);
1484
1485 #ifdef DEBUG_RELOC
1486 fprintf(stderr,
1487 " our_toc_offset set to %x\n", our_toc_offset);
1488 #endif
1489
1490 /* The size must still fit in a 16bit displacment */
1491 if (our_toc_offset >= 65535)
1492 {
1493 fprintf(stderr,
1494 "TOCDEFN Relocation exceeded displacement of 65535\n");
1495 abort();
1496 }
1497
1498 record_toc(toc_section, our_toc_offset, pub, strdup(name));
1499 }
1500 else if (IS_WRITTEN(our_toc_offset))
1501 {
1502 /* if it has been written out, it is marked with the
1503 1 bit. Fix up our offset, but do not write it out
1504 again.
1505 */
1506 MAKE_ADDR_AGAIN(our_toc_offset);
1507 #ifdef TOC_DEBUG
1508 fprintf(stderr,
1509 "Not writing out toc_offset of %d for %s\n",
1510 our_toc_offset, name);
1511 #endif
1512 }
1513 else
1514 {
1515 record_toc(toc_section, our_toc_offset, pub, strdup(name));
1516
1517 #ifdef TOC_DEBUG
1518 /* write out the toc entry */
1519 fprintf(stderr,
1520 "Writing out toc_offset "
1521 "toc_section (%p,%p)+%d val %d for %s\n",
1522 toc_section,
1523 toc_section->contents,
1524 our_toc_offset,
1525 val,
1526 name);
1527 #endif
1528
1529 /* write out the toc entry */
1530 bfd_put_32(output_bfd,
1531 val,
1532 toc_section->contents + our_toc_offset);
1533
1534 MARK_AS_WRITTEN(h->toc_offset);
1535 /* The tricky part is that this is the address that */
1536 /* needs a .reloc entry for it */
1537 fixit = true;
1538 }
1539 }
1540
1541 if (fixit && info->base_file)
1542 {
1543 /* So if this is non pcrelative, and is referenced
1544 to a section or a common symbol, then it needs a reloc */
1545
1546 /* relocation to a symbol in a section which
1547 isn't absolute - we output the address here
1548 to a file */
1549
1550 bfd_vma addr = toc_section->output_section->vma
1551 + toc_section->output_offset + our_toc_offset;
1552
1553 if (coff_data(output_bfd)->pe)
1554 addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
1555
1556 #ifdef DEBUG_RELOC
1557 fprintf(stderr,
1558 " Toc Section .reloc candidate addr = %x\n", addr);
1559 #endif
1560 fwrite (&addr, 1,4, (FILE *) info->base_file);
1561 }
1562
1563
1564 /* FIXME: this test is conservative */
1565 if ( (r_flags & IMAGE_REL_PPC_TOCDEFN) != IMAGE_REL_PPC_TOCDEFN &&
1566 our_toc_offset > toc_section->_raw_size)
1567 {
1568 fprintf(stderr,
1569 "reloc offset is bigger than the toc size!\n");
1570 abort();
1571 }
1572
1573 /* Now we know the relocation for this toc reference */
1574 relocation = our_toc_offset + TOC_LOAD_ADJUSTMENT;
1575 rstat = _bfd_relocate_contents (howto,
1576 input_bfd,
1577 relocation,
1578 loc);
1579 }
1580 break;
1581 case IMAGE_REL_PPC_IFGLUE:
1582 {
1583 /* To solve this, we need to know whether or not the symbol */
1584 /* appearing on the call instruction is a glue function or not. */
1585 /* A glue function must announce itself via a IMGLUE reloc, and */
1586 /* the reloc contains the required toc restore instruction */
1587
1588 bfd_vma x;
1589 const char *my_name;
1590 DUMP_RELOC2(howto->name, rel);
1591
1592 if (h != 0)
1593 {
1594 my_name = h->root.root.root.string;
1595 if (h->symbol_is_glue == 1)
1596 {
1597 x = bfd_get_32(input_bfd, loc);
1598 bfd_put_32(input_bfd, h->glue_insn, loc);
1599 }
1600 }
1601 }
1602 break;
1603 case IMAGE_REL_PPC_SECREL:
1604 /* Unimplemented: codeview debugging information */
1605 /* For fast access to the header of the section
1606 containing the item. */
1607 break;
1608 case IMAGE_REL_PPC_SECTION:
1609 /* Unimplemented: codeview debugging information */
1610 /* Is used to indicate that the value should be relative
1611 to the beginning of the section that contains the
1612 symbol */
1613 break;
1614 case IMAGE_REL_PPC_ABSOLUTE:
1615 {
1616 const char *my_name;
1617 if (h == 0)
1618 my_name = (syms+symndx)->_n._n_name;
1619 else
1620 {
1621 my_name = h->root.root.root.string;
1622 }
1623
1624 fprintf(stderr,
1625 "Warning: unsupported reloc %s <file %s, section %s>\n",
1626 howto->name,
1627 bfd_get_filename(input_bfd),
1628 input_section->name);
1629
1630 fprintf(stderr,"sym %ld (%s), r_vaddr %ld (%lx)\n",
1631 rel->r_symndx, my_name, (long) rel->r_vaddr,
1632 (unsigned long) rel->r_vaddr);
1633 }
1634 break;
1635 case IMAGE_REL_PPC_IMGLUE:
1636 {
1637 /* There is nothing to do now. This reloc was noted in the first
1638 pass over the relocs, and the glue instruction extracted */
1639 const char *my_name;
1640 if (h->symbol_is_glue == 1)
1641 break;
1642 my_name = h->root.root.root.string;
1643 fprintf(stderr,
1644 "Warning: previously missed IMGLUE reloc %s <file %s, section %s>\n",
1645 howto->name,
1646 bfd_get_filename(input_bfd),
1647 input_section->name);
1648 break;
1649
1650 }
1651 break;
1652
1653 case IMAGE_REL_PPC_ADDR32NB:
1654 {
1655 struct coff_link_hash_entry *myh = 0;
1656 const char *name = 0;
1657 DUMP_RELOC2(howto->name, rel);
1658
1659 if (strncmp(".idata$2",input_section->name,8) == 0 && first_thunk_address == 0)
1660 {
1661 /* set magic values */
1662 int idata5offset;
1663 struct coff_link_hash_entry *myh = 0;
1664 myh = coff_link_hash_lookup (coff_hash_table (info),
1665 "__idata5_magic__",
1666 false, false, true);
1667 first_thunk_address = myh->root.u.def.value +
1668 sec->output_section->vma +
1669 sec->output_offset -
1670 pe_data(output_bfd)->pe_opthdr.ImageBase;
1671
1672 idata5offset = myh->root.u.def.value;
1673 myh = coff_link_hash_lookup (coff_hash_table (info),
1674 "__idata6_magic__",
1675 false, false, true);
1676
1677 thunk_size = myh->root.u.def.value - idata5offset;
1678 myh = coff_link_hash_lookup (coff_hash_table (info),
1679 "__idata4_magic__",
1680 false, false, true);
1681 import_table_size = myh->root.u.def.value;
1682 #ifdef DEBUG_RELOC
1683 fprintf(stderr,
1684 "first computation triggered fta %x, ts %d(%x), its %d(%x)\n",
1685 first_thunk_address, thunk_size, thunk_size, import_table_size,
1686 import_table_size);
1687 #endif
1688 }
1689
1690 if (h == 0)
1691 { /* it is a file local symbol */
1692 sym = syms + symndx;
1693 name = sym->_n._n_name;
1694 }
1695 else
1696 {
1697 char *target = 0;
1698
1699 name = h->root.root.root.string;
1700 if (strcmp(".idata$2", name) == 0)
1701 target = "__idata2_magic__";
1702 else if (strcmp(".idata$4", name) == 0)
1703 target = "__idata4_magic__";
1704 else if (strcmp(".idata$5", name) == 0)
1705 target = "__idata5_magic__";
1706
1707 if (target != 0)
1708 {
1709 myh = 0;
1710
1711 myh = coff_link_hash_lookup (coff_hash_table (info),
1712 target,
1713 false, false, true);
1714 if (myh == 0)
1715 {
1716 fprintf(stderr, "Missing idata magic cookies, this cannot work anyway...\n");
1717 abort();
1718 }
1719
1720 val = myh->root.u.def.value +
1721 sec->output_section->vma + sec->output_offset;
1722 if (first_thunk_address == 0)
1723 {
1724 int idata5offset;
1725 myh = coff_link_hash_lookup (coff_hash_table (info),
1726 "__idata5_magic__",
1727 false, false, true);
1728 first_thunk_address = myh->root.u.def.value +
1729 sec->output_section->vma +
1730 sec->output_offset -
1731 pe_data(output_bfd)->pe_opthdr.ImageBase;
1732
1733 idata5offset = myh->root.u.def.value;
1734 myh = coff_link_hash_lookup (coff_hash_table (info),
1735 "__idata6_magic__",
1736 false, false, true);
1737
1738 thunk_size = myh->root.u.def.value - idata5offset;
1739 myh = coff_link_hash_lookup (coff_hash_table (info),
1740 "__idata4_magic__",
1741 false, false, true);
1742 import_table_size = myh->root.u.def.value;
1743 #ifdef DEBUG_RELOC
1744
1745 fprintf(stderr,
1746 "second computation triggered fta %x, ts %d(%x), its %d(%x)\n",
1747 first_thunk_address, thunk_size, thunk_size, import_table_size,
1748 import_table_size);
1749 #endif
1750 }
1751 }
1752 }
1753
1754 rstat = _bfd_relocate_contents (howto,
1755 input_bfd,
1756 val -
1757 pe_data(output_bfd)->pe_opthdr.ImageBase,
1758 loc);
1759 }
1760 break;
1761
1762 case IMAGE_REL_PPC_REL24:
1763 DUMP_RELOC2(howto->name, rel);
1764 val -= (input_section->output_section->vma
1765 + input_section->output_offset);
1766
1767 rstat = _bfd_relocate_contents (howto,
1768 input_bfd,
1769 val,
1770 loc);
1771 break;
1772 case IMAGE_REL_PPC_ADDR16:
1773 case IMAGE_REL_PPC_ADDR24:
1774 case IMAGE_REL_PPC_ADDR32:
1775 DUMP_RELOC2(howto->name, rel);
1776 rstat = _bfd_relocate_contents (howto,
1777 input_bfd,
1778 val,
1779 loc);
1780 break;
1781 }
1782
1783 if ( info->base_file )
1784 {
1785 /* So if this is non pcrelative, and is referenced
1786 to a section or a common symbol, then it needs a reloc */
1787 if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto))
1788 {
1789 /* relocation to a symbol in a section which
1790 isn't absolute - we output the address here
1791 to a file */
1792 bfd_vma addr = rel->r_vaddr
1793 - input_section->vma
1794 + input_section->output_offset
1795 + input_section->output_section->vma;
1796
1797 if (coff_data(output_bfd)->pe)
1798 {
1799 #ifdef DEBUG_RELOC
1800 bfd_vma before_addr = addr;
1801 #endif
1802 addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
1803 #ifdef DEBUG_RELOC
1804 fprintf(stderr,
1805 " adjusted down from %x to %x", before_addr, addr);
1806 #endif
1807 }
1808 #ifdef DEBUG_RELOC
1809 fprintf(stderr, "\n");
1810 #endif
1811
1812 fwrite (&addr, 1,4, (FILE *) info->base_file);
1813 }
1814 }
1815
1816 switch (rstat)
1817 {
1818 default:
1819 abort ();
1820 case bfd_reloc_ok:
1821 break;
1822 case bfd_reloc_overflow:
1823 {
1824 const char *name;
1825 char buf[SYMNMLEN + 1];
1826
1827 if (symndx == -1)
1828 name = "*ABS*";
1829 else if (h != NULL)
1830 name = h->root.root.root.string;
1831 else if (sym == NULL)
1832 name = "*unknown*";
1833 else if (sym->_n._n_n._n_zeroes == 0
1834 && sym->_n._n_n._n_offset != 0)
1835 name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset;
1836 else
1837 {
1838 strncpy (buf, sym->_n._n_name, SYMNMLEN);
1839 buf[SYMNMLEN] = '\0';
1840 name = buf;
1841 }
1842 #if 0
1843 else
1844 {
1845 name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
1846 if (name == NULL)
1847 return false;
1848 }
1849 #endif
1850
1851 if (! ((*info->callbacks->reloc_overflow)
1852 (info, name, howto->name,
1853 (bfd_vma) 0, input_bfd,
1854 input_section, rel->r_vaddr - input_section->vma)))
1855 {
1856 #ifdef DEBUG_RELOC
1857 fprintf(stderr,
1858 "pe_ppc_relocate_section (%s) for %s in bfd %s RETURNING TRUE\n",
1859 TARGET_LITTLE_NAME,
1860 input_section->name,
1861 input_bfd->filename);
1862
1863 #endif
1864 return false;
1865 }
1866 }
1867 }
1868
1869 }
1870
1871 #ifdef DEBUG_RELOC
1872 fprintf(stderr,
1873 "pe_ppc_relocate_section (%s) for %s in bfd %s RETURNING TRUE\n",
1874 TARGET_LITTLE_NAME,
1875 input_section->name,
1876 input_bfd->filename);
1877
1878 #endif
1879
1880 return true;
1881 }
1882
1883
1884 #ifdef COFF_IMAGE_WITH_PE
1885
1886 long int global_toc_size = 4;
1887
1888 bfd* bfd_of_toc_owner = 0;
1889
1890 long int import_table_size;
1891 long int first_thunk_address;
1892 long int thunk_size;
1893
1894 struct list_ele *head;
1895 struct list_ele *tail;
1896
1897 static char *
1898 h1 = "\n\t\t\tTOC MAPPING\n\n";
1899 static char *
1900 h2 = " TOC disassembly Comments Name\n";
1901 static char *
1902 h3 = " Offset spelling (if present)\n";
1903
1904 void
1905 dump_toc(vfile)
1906 void *vfile;
1907 {
1908 FILE *file = vfile;
1909 struct list_ele *t;
1910
1911 fprintf(file, h1);
1912 fprintf(file, h2);
1913 fprintf(file, h3);
1914
1915 for(t = head; t != 0; t=t->next)
1916 {
1917 char *cat;
1918
1919 if (t->cat == priv)
1920 cat = "private ";
1921 else if (t->cat == pub)
1922 cat = "public ";
1923 else if (t->cat == data)
1924 cat = "data-in-toc ";
1925
1926 if (t->offset > global_toc_size)
1927 {
1928 if (t->offset <= global_toc_size + thunk_size)
1929 cat = "IAT reference ";
1930 else
1931 {
1932 fprintf(file,
1933 "**** global_toc_size %ld(%lx), thunk_size %ld(%lx)\n",
1934 global_toc_size, global_toc_size, thunk_size, thunk_size);
1935 cat = "Out of bounds!";
1936 }
1937 }
1938
1939 fprintf(file,
1940 " %04lx (%d)", (unsigned long) t->offset, t->offset - 32768);
1941 fprintf(file,
1942 " %s %s\n",
1943 cat, t->name);
1944
1945 }
1946
1947 fprintf(file, "\n");
1948 }
1949
1950 boolean
1951 ppc_allocate_toc_section (info)
1952 struct bfd_link_info *info;
1953 {
1954 asection *s;
1955 bfd_byte *foo;
1956 static char test_char = '1';
1957
1958 if ( global_toc_size == 0 ) /* FIXME: does this get me in trouble? */
1959 return true;
1960
1961 if (bfd_of_toc_owner == 0)
1962 {
1963 fprintf(stderr,
1964 "There is no bfd that owns the toc section!\n");
1965 abort();
1966 }
1967
1968 s = bfd_get_section_by_name ( bfd_of_toc_owner , TOC_SECTION_NAME);
1969 if (s == NULL)
1970 {
1971 fprintf(stderr, "No Toc section!\n");
1972 abort();
1973 }
1974
1975 foo = (bfd_byte *) bfd_alloc(bfd_of_toc_owner, global_toc_size);
1976 memset(foo, test_char, global_toc_size);
1977
1978 s->_raw_size = s->_cooked_size = global_toc_size;
1979 s->contents = foo;
1980
1981 return true;
1982 }
1983
1984 boolean
1985 ppc_process_before_allocation (abfd, info)
1986 bfd *abfd;
1987 struct bfd_link_info *info;
1988 {
1989 asection *sec;
1990 struct internal_reloc *i, *rel;
1991
1992 #ifdef DEBUG_RELOC
1993 fprintf(stderr,
1994 "ppc_process_before_allocation: BFD %s\n",
1995 bfd_get_filename(abfd));
1996 #endif
1997
1998 /* here we have a bfd that is to be included on the link. We have a hook
1999 to do reloc rummaging, before section sizes are nailed down. */
2000
2001 _bfd_coff_get_external_symbols(abfd);
2002
2003 /* rummage around all the relocs and map the toc */
2004 sec = abfd->sections;
2005
2006 if (sec == 0)
2007 {
2008 return true;
2009 }
2010
2011 for (; sec != 0; sec = sec->next)
2012 {
2013 int toc_offset;
2014
2015 #ifdef DEBUG_RELOC
2016 fprintf(stderr,
2017 " section %s reloc count %d\n",
2018 sec->name,
2019 sec->reloc_count);
2020 #endif
2021
2022 if (sec->reloc_count == 0)
2023 continue;
2024
2025 /* load the relocs */
2026 /* FIXME: there may be a storage leak here */
2027 i=_bfd_coff_read_internal_relocs(abfd,sec,1,0,0,0);
2028
2029 if (i == 0)
2030 abort();
2031
2032 for (rel=i;rel<i+sec->reloc_count;++rel)
2033 {
2034 unsigned short r_type = EXTRACT_TYPE (rel->r_type);
2035 unsigned short r_flags = EXTRACT_FLAGS(rel->r_type);
2036
2037 #ifdef DEBUG_RELOC
2038 /* now examine flags */
2039 if (r_flags != 0)
2040 {
2041 fprintf (stderr, "Reloc with flags found!");
2042 if ( r_flags & IMAGE_REL_PPC_NEG )
2043 fprintf (stderr, " NEG");
2044 if ( r_flags & IMAGE_REL_PPC_BRTAKEN )
2045 fprintf (stderr, " BRTAKEN");
2046 if ( r_flags & IMAGE_REL_PPC_BRNTAKEN )
2047 fprintf (stderr, " BRNTAKEN");
2048 if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
2049 fprintf (stderr, " TOCDEFN");
2050 fprintf(stderr, "\n");
2051 }
2052 #endif
2053
2054 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
2055
2056 switch(r_type)
2057 {
2058 case IMAGE_REL_PPC_TOCREL16:
2059 #if 0
2060 /* FIXME:
2061 This remains unimplemented for now, as it currently adds
2062 un-necessary elements to the toc. All we need to do today
2063 is not do anything if TOCDEFN is on.
2064 */
2065 if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
2066 toc_offset = ppc_record_data_in_toc_entry(abfd, info, sec,
2067 rel->r_symndx,
2068 default_toc);
2069 else
2070 toc_offset = ppc_record_toc_entry(abfd, info, sec,
2071 rel->r_symndx, default_toc);
2072 #endif
2073 if ( (r_flags & IMAGE_REL_PPC_TOCDEFN) != IMAGE_REL_PPC_TOCDEFN )
2074 toc_offset = ppc_record_toc_entry(abfd, info, sec,
2075 rel->r_symndx, default_toc);
2076 break;
2077 case IMAGE_REL_PPC_IMGLUE:
2078 ppc_mark_symbol_as_glue(abfd, rel->r_symndx, rel);
2079 break;
2080 default:
2081 break;
2082 }
2083 }
2084 }
2085
2086 return true;
2087 }
2088
2089 #endif
2090
2091
2092 static bfd_reloc_status_type
2093 ppc_refhi_reloc (abfd,
2094 reloc_entry,
2095 symbol,
2096 data,
2097 input_section,
2098 output_bfd,
2099 error_message)
2100 bfd *abfd;
2101 arelent *reloc_entry;
2102 asymbol *symbol;
2103 PTR data;
2104 asection *input_section;
2105 bfd *output_bfd;
2106 char **error_message;
2107 {
2108 UN_IMPL("REFHI");
2109 DUMP_RELOC("REFHI",reloc_entry);
2110
2111 if (output_bfd == (bfd *) NULL)
2112 return bfd_reloc_continue;
2113
2114 return bfd_reloc_undefined;
2115 }
2116
2117 #if 0
2118
2119 static bfd_reloc_status_type
2120 ppc_reflo_reloc (abfd,
2121 reloc_entry,
2122 symbol,
2123 data,
2124 input_section,
2125 output_bfd,
2126 error_message)
2127 bfd *abfd;
2128 arelent *reloc_entry;
2129 asymbol *symbol;
2130 PTR data;
2131 asection *input_section;
2132 bfd *output_bfd;
2133 char **error_message;
2134 {
2135 UN_IMPL("REFLO");
2136 DUMP_RELOC("REFLO",reloc_entry);
2137
2138 if (output_bfd == (bfd *) NULL)
2139 return bfd_reloc_continue;
2140
2141 return bfd_reloc_undefined;
2142 }
2143
2144 #endif
2145
2146 static bfd_reloc_status_type
2147 ppc_pair_reloc (abfd,
2148 reloc_entry,
2149 symbol,
2150 data,
2151 input_section,
2152 output_bfd,
2153 error_message)
2154 bfd *abfd;
2155 arelent *reloc_entry;
2156 asymbol *symbol;
2157 PTR data;
2158 asection *input_section;
2159 bfd *output_bfd;
2160 char **error_message;
2161 {
2162 UN_IMPL("PAIR");
2163 DUMP_RELOC("PAIR",reloc_entry);
2164
2165 if (output_bfd == (bfd *) NULL)
2166 return bfd_reloc_continue;
2167
2168 return bfd_reloc_undefined;
2169 }
2170
2171 \f
2172 static bfd_reloc_status_type
2173 ppc_toc16_reloc (abfd,
2174 reloc_entry,
2175 symbol,
2176 data,
2177 input_section,
2178 output_bfd,
2179 error_message)
2180 bfd *abfd;
2181 arelent *reloc_entry;
2182 asymbol *symbol;
2183 PTR data;
2184 asection *input_section;
2185 bfd *output_bfd;
2186 char **error_message;
2187 {
2188 UN_IMPL("TOCREL16");
2189 DUMP_RELOC("TOCREL16",reloc_entry);
2190
2191 if (output_bfd == (bfd *) NULL)
2192 {
2193 return bfd_reloc_continue;
2194 }
2195
2196 return bfd_reloc_ok;
2197 }
2198
2199 #if 0
2200
2201 /* ADDR32NB : 32 bit address relative to the virtual origin. */
2202 /* (On the alpha, this is always a linker generated thunk)*/
2203 /* (i.e. 32bit addr relative to the image base) */
2204 /* */
2205 /* */
2206
2207 static bfd_reloc_status_type
2208 ppc_addr32nb_reloc (abfd,
2209 reloc_entry,
2210 symbol,
2211 data,
2212 input_section,
2213 output_bfd,
2214 error_message)
2215 bfd *abfd;
2216 arelent *reloc_entry;
2217 asymbol *symbol;
2218 PTR data;
2219 asection *input_section;
2220 bfd *output_bfd;
2221 char **error_message;
2222 {
2223 UN_IMPL("ADDR32NB");
2224 DUMP_RELOC("ADDR32NB",reloc_entry);
2225
2226 return bfd_reloc_ok;
2227 }
2228
2229 #endif
2230
2231 static bfd_reloc_status_type
2232 ppc_secrel_reloc (abfd,
2233 reloc_entry,
2234 symbol,
2235 data,
2236 input_section,
2237 output_bfd,
2238 error_message)
2239 bfd *abfd;
2240 arelent *reloc_entry;
2241 asymbol *symbol;
2242 PTR data;
2243 asection *input_section;
2244 bfd *output_bfd;
2245 char **error_message;
2246 {
2247 UN_IMPL("SECREL");
2248 DUMP_RELOC("SECREL",reloc_entry);
2249
2250 if (output_bfd == (bfd *) NULL)
2251 return bfd_reloc_continue;
2252
2253 return bfd_reloc_ok;
2254 }
2255
2256 static bfd_reloc_status_type
2257 ppc_section_reloc (abfd,
2258 reloc_entry,
2259 symbol,
2260 data,
2261 input_section,
2262 output_bfd,
2263 error_message)
2264 bfd *abfd;
2265 arelent *reloc_entry;
2266 asymbol *symbol;
2267 PTR data;
2268 asection *input_section;
2269 bfd *output_bfd;
2270 char **error_message;
2271 {
2272 UN_IMPL("SECTION");
2273 DUMP_RELOC("SECTION",reloc_entry);
2274
2275 if (output_bfd == (bfd *) NULL)
2276 return bfd_reloc_continue;
2277
2278 return bfd_reloc_ok;
2279 }
2280
2281 static bfd_reloc_status_type
2282 ppc_imglue_reloc (abfd,
2283 reloc_entry,
2284 symbol,
2285 data,
2286 input_section,
2287 output_bfd,
2288 error_message)
2289 bfd *abfd;
2290 arelent *reloc_entry;
2291 asymbol *symbol;
2292 PTR data;
2293 asection *input_section;
2294 bfd *output_bfd;
2295 char **error_message;
2296 {
2297 UN_IMPL("IMGLUE");
2298 DUMP_RELOC("IMGLUE",reloc_entry);
2299
2300 if (output_bfd == (bfd *) NULL)
2301 return bfd_reloc_continue;
2302
2303 return bfd_reloc_ok;
2304 }
2305
2306 \f
2307
2308 #define MAX_RELOC_INDEX \
2309 (sizeof(ppc_coff_howto_table) / sizeof(ppc_coff_howto_table[0]) - 1)
2310
2311
2312 /* FIXME: There is a possiblity that when we read in a reloc from a file,
2313 that there are some bits encoded in the upper portion of the
2314 type field. Not yet implemented.
2315 */
2316 static void ppc_coff_rtype2howto PARAMS ((arelent *relent,
2317 struct internal_reloc *internal));
2318
2319 static void
2320 ppc_coff_rtype2howto (relent, internal)
2321 arelent *relent;
2322 struct internal_reloc *internal;
2323 {
2324
2325 /* We can encode one of three things in the type field, aside from the
2326 type:
2327 1. IMAGE_REL_PPC_NEG - indicates the value field is a subtraction
2328 value, rather than an addition value
2329 2. IMAGE_REL_PPC_BRTAKEN, IMAGE_REL_PPC_BRNTAKEN - indicates that
2330 the branch is expected to be taken or not.
2331 3. IMAGE_REL_PPC_TOCDEFN - toc slot definition in the file
2332 For now, we just strip this stuff to find the type, and ignore it other
2333 than that.
2334 */
2335 reloc_howto_type *howto;
2336 unsigned short r_type = EXTRACT_TYPE (internal->r_type);
2337 unsigned short r_flags = EXTRACT_FLAGS(internal->r_type);
2338 unsigned short junk = EXTRACT_JUNK (internal->r_type);
2339
2340 /* the masking process only slices off the bottom byte for r_type. */
2341 if ( r_type > MAX_RELOC_INDEX )
2342 {
2343 fprintf(stderr,
2344 "ppc_coff_rtype2howto: reloc index %d out of range [%d, %ld]\n",
2345 internal->r_type, 0, (long) MAX_RELOC_INDEX);
2346 abort();
2347 }
2348
2349 /* check for absolute crap */
2350 if ( junk != 0 )
2351 {
2352 fprintf(stderr,
2353 "ppc_coff_rtype2howto: reloc index %d contains junk %d\n",
2354 internal->r_type, junk);
2355 abort();
2356 }
2357
2358 #ifdef DEBUG_RELOC
2359 /* now examine flags */
2360 if (r_flags != 0)
2361 {
2362 fprintf (stderr, "Reloc with flags found!");
2363 if ( r_flags & IMAGE_REL_PPC_NEG )
2364 fprintf (stderr, " NEG");
2365 if ( r_flags & IMAGE_REL_PPC_BRTAKEN )
2366 fprintf (stderr, " BRTAKEN");
2367 if ( r_flags & IMAGE_REL_PPC_BRNTAKEN )
2368 fprintf (stderr, " BRNTAKEN");
2369 if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
2370 fprintf (stderr, " TOCDEFN");
2371 fprintf(stderr, "\n");
2372 }
2373 #endif
2374
2375 switch(r_type)
2376 {
2377 case IMAGE_REL_PPC_ADDR16:
2378 case IMAGE_REL_PPC_REL24:
2379 case IMAGE_REL_PPC_ADDR24:
2380 case IMAGE_REL_PPC_ADDR32:
2381 case IMAGE_REL_PPC_IFGLUE:
2382 case IMAGE_REL_PPC_ADDR32NB:
2383 case IMAGE_REL_PPC_SECTION:
2384 case IMAGE_REL_PPC_SECREL:
2385 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal);
2386 howto = ppc_coff_howto_table + r_type;
2387 break;
2388 case IMAGE_REL_PPC_IMGLUE:
2389 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal);
2390 howto = ppc_coff_howto_table + r_type;
2391 break;
2392 case IMAGE_REL_PPC_TOCREL16:
2393 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal);
2394 if (r_flags & IMAGE_REL_PPC_TOCDEFN)
2395 howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16_DEFN;
2396 else
2397 howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16;
2398 break;
2399 default:
2400 fprintf(stderr,
2401 "Warning: Unsupported reloc %s [%d] used -- it may not work.\n",
2402 ppc_coff_howto_table[r_type].name,
2403 r_type);
2404 howto = ppc_coff_howto_table + r_type;
2405 break;
2406 }
2407
2408 relent->howto = howto;
2409
2410 }
2411
2412 static reloc_howto_type *
2413 coff_ppc_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
2414 bfd *abfd;
2415 asection *sec;
2416 struct internal_reloc *rel;
2417 struct coff_link_hash_entry *h;
2418 struct internal_syment *sym;
2419 bfd_vma *addendp;
2420 {
2421 reloc_howto_type *howto;
2422
2423 /* We can encode one of three things in the type field, aside from the
2424 type:
2425 1. IMAGE_REL_PPC_NEG - indicates the value field is a subtraction
2426 value, rather than an addition value
2427 2. IMAGE_REL_PPC_BRTAKEN, IMAGE_REL_PPC_BRNTAKEN - indicates that
2428 the branch is expected to be taken or not.
2429 3. IMAGE_REL_PPC_TOCDEFN - toc slot definition in the file
2430 For now, we just strip this stuff to find the type, and ignore it other
2431 than that.
2432 */
2433
2434 unsigned short r_type = EXTRACT_TYPE (rel->r_type);
2435 unsigned short r_flags = EXTRACT_FLAGS(rel->r_type);
2436 unsigned short junk = EXTRACT_JUNK (rel->r_type);
2437
2438 /* the masking process only slices off the bottom byte for r_type. */
2439 if ( r_type > MAX_RELOC_INDEX )
2440 {
2441 fprintf(stderr,
2442 "coff_ppc_rtype_to_howto: index %d out of range [%d, %ld]\n",
2443 r_type, 0, (long) MAX_RELOC_INDEX);
2444 abort();
2445 }
2446
2447 /* check for absolute crap */
2448 if ( junk != 0 )
2449 {
2450 fprintf(stderr,
2451 "coff_ppc_rtype_to_howto: reloc index %d contains junk %d\n",
2452 rel->r_type, junk);
2453 abort();
2454 }
2455
2456 #ifdef DEBUG_RELOC
2457 /* now examine flags */
2458 if (r_flags != 0)
2459 {
2460 fprintf (stderr, "Reloc with flags found!");
2461 if ( r_flags & IMAGE_REL_PPC_NEG )
2462 fprintf (stderr, " NEG");
2463 if ( r_flags & IMAGE_REL_PPC_BRTAKEN )
2464 fprintf (stderr, " BRTAKEN");
2465 if ( r_flags & IMAGE_REL_PPC_BRNTAKEN )
2466 fprintf (stderr, " BRNTAKEN");
2467 if ( r_flags & IMAGE_REL_PPC_TOCDEFN )
2468 fprintf (stderr, " TOCDEFN");
2469 fprintf(stderr, "\n");
2470 }
2471 #endif
2472
2473 switch(r_type)
2474 {
2475 case IMAGE_REL_PPC_ADDR32NB:
2476 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
2477 *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;
2478 howto = ppc_coff_howto_table + r_type;
2479 break;
2480 case IMAGE_REL_PPC_TOCREL16:
2481 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
2482 if (r_flags & IMAGE_REL_PPC_TOCDEFN)
2483 howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16_DEFN;
2484 else
2485 howto = ppc_coff_howto_table + IMAGE_REL_PPC_TOCREL16;
2486 break;
2487 case IMAGE_REL_PPC_ADDR16:
2488 case IMAGE_REL_PPC_REL24:
2489 case IMAGE_REL_PPC_ADDR24:
2490 case IMAGE_REL_PPC_ADDR32:
2491 case IMAGE_REL_PPC_IFGLUE:
2492 case IMAGE_REL_PPC_SECTION:
2493 case IMAGE_REL_PPC_SECREL:
2494 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
2495 howto = ppc_coff_howto_table + r_type;
2496 break;
2497 case IMAGE_REL_PPC_IMGLUE:
2498 DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel);
2499 howto = ppc_coff_howto_table + r_type;
2500 break;
2501 default:
2502 fprintf(stderr,
2503 "Warning: Unsupported reloc %s [%d] used -- it may not work.\n",
2504 ppc_coff_howto_table[r_type].name,
2505 r_type);
2506 howto = ppc_coff_howto_table + r_type;
2507 break;
2508 }
2509
2510 return howto;
2511 }
2512
2513
2514 /* a cheesy little macro to make the code a little more readable */
2515 #define HOW2MAP(bfd_rtype,ppc_rtype) \
2516 case bfd_rtype: return &ppc_coff_howto_table[ppc_rtype]
2517
2518 static reloc_howto_type *ppc_coff_reloc_type_lookup
2519 PARAMS ((bfd *, bfd_reloc_code_real_type));
2520
2521 static reloc_howto_type *
2522 ppc_coff_reloc_type_lookup (abfd, code)
2523 bfd *abfd;
2524 bfd_reloc_code_real_type code;
2525 {
2526
2527 #ifdef DEBUG_RELOC
2528 fprintf(stderr, "ppc_coff_reloc_type_lookup for %s\n",
2529 bfd_get_reloc_code_name(code));
2530 #endif
2531
2532 switch (code)
2533 {
2534 HOW2MAP(BFD_RELOC_32_GOTOFF, IMAGE_REL_PPC_IMGLUE);
2535 HOW2MAP(BFD_RELOC_16_GOT_PCREL, IMAGE_REL_PPC_IFGLUE);
2536 HOW2MAP(BFD_RELOC_16, IMAGE_REL_PPC_ADDR16);
2537 HOW2MAP(BFD_RELOC_PPC_B26, IMAGE_REL_PPC_REL24);
2538 HOW2MAP(BFD_RELOC_PPC_BA26, IMAGE_REL_PPC_ADDR24);
2539 HOW2MAP(BFD_RELOC_PPC_TOC16, IMAGE_REL_PPC_TOCREL16);
2540 HOW2MAP(BFD_RELOC_16_GOTOFF, IMAGE_REL_PPC_TOCREL16_DEFN);
2541 HOW2MAP(BFD_RELOC_32, IMAGE_REL_PPC_ADDR32);
2542 HOW2MAP(BFD_RELOC_RVA, IMAGE_REL_PPC_ADDR32NB);
2543 default:
2544 return NULL;
2545 }
2546 /*NOTREACHED*/
2547 }
2548
2549 #undef HOW2MAP
2550
2551 \f
2552 /* Tailor coffcode.h -- macro heaven. */
2553
2554 #define RTYPE2HOWTO(cache_ptr, dst) ppc_coff_rtype2howto (cache_ptr, dst)
2555
2556 #ifndef COFF_IMAGE_WITH_PE
2557 static void
2558 ppc_coff_swap_sym_in_hook ();
2559 #endif
2560
2561 /* We use the special COFF backend linker, with our own special touch. */
2562
2563 #define coff_bfd_reloc_type_lookup ppc_coff_reloc_type_lookup
2564 #define coff_rtype_to_howto coff_ppc_rtype_to_howto
2565 #define coff_relocate_section coff_ppc_relocate_section
2566 #define coff_bfd_final_link ppc_bfd_coff_final_link
2567
2568 #ifndef COFF_IMAGE_WITH_PE
2569 #define coff_swap_sym_in_hook ppc_coff_swap_sym_in_hook
2570 #endif
2571
2572 #define SELECT_RELOC(internal, howto) {internal.r_type=howto->type;}
2573
2574 #define COFF_PAGE_SIZE 0x1000
2575
2576 #define POWERPC_LE_PE
2577
2578 #include "coffcode.h"
2579
2580 \f
2581
2582 #ifndef COFF_IMAGE_WITH_PE
2583 /* FIXME:
2584 What we're trying to do here is allocate a toc section (early), and attach
2585 it to the last bfd to be processed. This avoids the problem of having a toc
2586 written out before all files have been processed. This code allocates
2587 a toc section for every file, and records the last one seen. There are
2588 at least two problems with this approach:
2589 1. We allocate whole bunches of toc sections that are ignored, but at
2590 at least we will not allocate a toc if no .toc is present.
2591 2. It's not clear to me that being the last bfd read necessarily means
2592 that you are the last bfd closed.
2593 3. Doing it on a "swap in" hook depends on when the "swap in" is called,
2594 and how often, etc. It's not clear to me that there isn't a hole here.
2595 */
2596
2597 static void
2598 ppc_coff_swap_sym_in_hook (abfd, ext1, in1)
2599 bfd *abfd;
2600 PTR ext1;
2601 PTR in1;
2602 {
2603 struct internal_syment *in = (struct internal_syment *)in1;
2604
2605 if (bfd_of_toc_owner != 0) /* we already have a toc, so go home */
2606 return;
2607
2608 if (strcmp(in->_n._n_name, ".toc") == 0)
2609 {
2610 flagword flags;
2611 register asection *s;
2612
2613 s = bfd_get_section_by_name ( abfd , TOC_SECTION_NAME);
2614 if (s != NULL)
2615 {
2616 return;
2617 }
2618
2619 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ;
2620
2621 #ifdef TOC_DEBUG
2622 fprintf(stderr,
2623 "ppc_coff_swap_sym_in_hook: about to create the %s section\n",
2624 TOC_SECTION_NAME);
2625 #endif
2626
2627 s = bfd_make_section (abfd, TOC_SECTION_NAME);
2628
2629 if (s == NULL
2630 || !bfd_set_section_flags (abfd, s, flags)
2631 || !bfd_set_section_alignment (abfd, s, 2))
2632 {
2633 fprintf(stderr,
2634 "toc section allocation failed!\n");
2635 abort();
2636 }
2637
2638 /* save the bfd for later allocation */
2639 bfd_of_toc_owner = abfd;
2640 }
2641
2642 return;
2643 }
2644 #endif
2645
2646 boolean
2647 ppc_bfd_coff_final_link ();
2648
2649 #ifndef COFF_IMAGE_WITH_PE
2650
2651 static boolean
2652 ppc_do_last(abfd)
2653 bfd *abfd;
2654 {
2655 if (abfd == bfd_of_toc_owner)
2656 return true;
2657 else
2658 return false;
2659 }
2660
2661 static bfd *
2662 ppc_get_last()
2663 {
2664 return bfd_of_toc_owner;
2665 }
2666
2667 /* this piece of machinery exists only to guarantee that the bfd that holds
2668 the toc section is written last.
2669
2670 This does depend on bfd_make_section attaching a new section to the
2671 end of the section list for the bfd.
2672
2673 This is otherwise intended to be functionally the same as
2674 cofflink.c:_bfd_coff_final_link(). It is specifically different only
2675 where the POWERPC_LE_PE macro modifies the code. It is left in as a
2676 precise form of comment. krk@cygnus.com
2677 */
2678 #define POWERPC_LE_PE
2679
2680
2681 /* Do the final link step. */
2682
2683 boolean
2684 ppc_bfd_coff_final_link (abfd, info)
2685 bfd *abfd;
2686 struct bfd_link_info *info;
2687 {
2688 bfd_size_type symesz;
2689 struct coff_final_link_info finfo;
2690 boolean debug_merge_allocated;
2691 asection *o;
2692 struct bfd_link_order *p;
2693 size_t max_sym_count;
2694 size_t max_lineno_count;
2695 size_t max_reloc_count;
2696 size_t max_output_reloc_count;
2697 size_t max_contents_size;
2698 file_ptr rel_filepos;
2699 unsigned int relsz;
2700 file_ptr line_filepos;
2701 unsigned int linesz;
2702 bfd *sub;
2703 bfd_byte *external_relocs = NULL;
2704 char strbuf[STRING_SIZE_SIZE];
2705
2706 symesz = bfd_coff_symesz (abfd);
2707
2708 finfo.info = info;
2709 finfo.output_bfd = abfd;
2710 finfo.strtab = NULL;
2711 finfo.section_info = NULL;
2712 finfo.last_file_index = -1;
2713 finfo.last_bf_index = -1;
2714 finfo.internal_syms = NULL;
2715 finfo.sec_ptrs = NULL;
2716 finfo.sym_indices = NULL;
2717 finfo.outsyms = NULL;
2718 finfo.linenos = NULL;
2719 finfo.contents = NULL;
2720 finfo.external_relocs = NULL;
2721 finfo.internal_relocs = NULL;
2722 debug_merge_allocated = false;
2723
2724 coff_data (abfd)->link_info = info;
2725
2726 finfo.strtab = _bfd_stringtab_init ();
2727 if (finfo.strtab == NULL)
2728 goto error_return;
2729
2730 if (! coff_debug_merge_hash_table_init (&finfo.debug_merge))
2731 goto error_return;
2732 debug_merge_allocated = true;
2733
2734 /* Compute the file positions for all the sections. */
2735 if (! abfd->output_has_begun)
2736 bfd_coff_compute_section_file_positions (abfd);
2737
2738 /* Count the line numbers and relocation entries required for the
2739 output file. Set the file positions for the relocs. */
2740 rel_filepos = obj_relocbase (abfd);
2741 relsz = bfd_coff_relsz (abfd);
2742 max_contents_size = 0;
2743 max_lineno_count = 0;
2744 max_reloc_count = 0;
2745
2746 for (o = abfd->sections; o != NULL; o = o->next)
2747 {
2748 o->reloc_count = 0;
2749 o->lineno_count = 0;
2750 for (p = o->link_order_head; p != NULL; p = p->next)
2751 {
2752
2753 if (p->type == bfd_indirect_link_order)
2754 {
2755 asection *sec;
2756
2757 sec = p->u.indirect.section;
2758
2759 /* Mark all sections which are to be included in the
2760 link. This will normally be every section. We need
2761 to do this so that we can identify any sections which
2762 the linker has decided to not include. */
2763 sec->linker_mark = true;
2764
2765 if (info->strip == strip_none
2766 || info->strip == strip_some)
2767 o->lineno_count += sec->lineno_count;
2768
2769 if (info->relocateable)
2770 o->reloc_count += sec->reloc_count;
2771
2772 if (sec->_raw_size > max_contents_size)
2773 max_contents_size = sec->_raw_size;
2774 if (sec->lineno_count > max_lineno_count)
2775 max_lineno_count = sec->lineno_count;
2776 if (sec->reloc_count > max_reloc_count)
2777 max_reloc_count = sec->reloc_count;
2778 }
2779 else if (info->relocateable
2780 && (p->type == bfd_section_reloc_link_order
2781 || p->type == bfd_symbol_reloc_link_order))
2782 ++o->reloc_count;
2783 }
2784 if (o->reloc_count == 0)
2785 o->rel_filepos = 0;
2786 else
2787 {
2788 o->flags |= SEC_RELOC;
2789 o->rel_filepos = rel_filepos;
2790 rel_filepos += o->reloc_count * relsz;
2791 }
2792 }
2793
2794 /* If doing a relocateable link, allocate space for the pointers we
2795 need to keep. */
2796 if (info->relocateable)
2797 {
2798 unsigned int i;
2799
2800 /* We use section_count + 1, rather than section_count, because
2801 the target_index fields are 1 based. */
2802 finfo.section_info =
2803 ((struct coff_link_section_info *)
2804 bfd_malloc ((abfd->section_count + 1)
2805 * sizeof (struct coff_link_section_info)));
2806 if (finfo.section_info == NULL)
2807 goto error_return;
2808 for (i = 0; i <= abfd->section_count; i++)
2809 {
2810 finfo.section_info[i].relocs = NULL;
2811 finfo.section_info[i].rel_hashes = NULL;
2812 }
2813 }
2814
2815 /* We now know the size of the relocs, so we can determine the file
2816 positions of the line numbers. */
2817 line_filepos = rel_filepos;
2818 linesz = bfd_coff_linesz (abfd);
2819 max_output_reloc_count = 0;
2820 for (o = abfd->sections; o != NULL; o = o->next)
2821 {
2822 if (o->lineno_count == 0)
2823 o->line_filepos = 0;
2824 else
2825 {
2826 o->line_filepos = line_filepos;
2827 line_filepos += o->lineno_count * linesz;
2828 }
2829
2830 if (o->reloc_count != 0)
2831 {
2832 /* We don't know the indices of global symbols until we have
2833 written out all the local symbols. For each section in
2834 the output file, we keep an array of pointers to hash
2835 table entries. Each entry in the array corresponds to a
2836 reloc. When we find a reloc against a global symbol, we
2837 set the corresponding entry in this array so that we can
2838 fix up the symbol index after we have written out all the
2839 local symbols.
2840
2841 Because of this problem, we also keep the relocs in
2842 memory until the end of the link. This wastes memory,
2843 but only when doing a relocateable link, which is not the
2844 common case. */
2845 BFD_ASSERT (info->relocateable);
2846 finfo.section_info[o->target_index].relocs =
2847 ((struct internal_reloc *)
2848 bfd_malloc (o->reloc_count * sizeof (struct internal_reloc)));
2849 finfo.section_info[o->target_index].rel_hashes =
2850 ((struct coff_link_hash_entry **)
2851 bfd_malloc (o->reloc_count
2852 * sizeof (struct coff_link_hash_entry *)));
2853 if (finfo.section_info[o->target_index].relocs == NULL
2854 || finfo.section_info[o->target_index].rel_hashes == NULL)
2855 goto error_return;
2856
2857 if (o->reloc_count > max_output_reloc_count)
2858 max_output_reloc_count = o->reloc_count;
2859 }
2860
2861 /* Reset the reloc and lineno counts, so that we can use them to
2862 count the number of entries we have output so far. */
2863 o->reloc_count = 0;
2864 o->lineno_count = 0;
2865 }
2866
2867 obj_sym_filepos (abfd) = line_filepos;
2868
2869 /* Figure out the largest number of symbols in an input BFD. Take
2870 the opportunity to clear the output_has_begun fields of all the
2871 input BFD's. */
2872 max_sym_count = 0;
2873 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
2874 {
2875 size_t sz;
2876
2877 sub->output_has_begun = false;
2878 sz = obj_raw_syment_count (sub);
2879 if (sz > max_sym_count)
2880 max_sym_count = sz;
2881 }
2882
2883 /* Allocate some buffers used while linking. */
2884 finfo.internal_syms = ((struct internal_syment *)
2885 bfd_malloc (max_sym_count
2886 * sizeof (struct internal_syment)));
2887 finfo.sec_ptrs = (asection **) bfd_malloc (max_sym_count
2888 * sizeof (asection *));
2889 finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
2890 finfo.outsyms = ((bfd_byte *)
2891 bfd_malloc ((size_t) ((max_sym_count + 1) * symesz)));
2892 finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count
2893 * bfd_coff_linesz (abfd));
2894 finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
2895 finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz);
2896 if (! info->relocateable)
2897 finfo.internal_relocs = ((struct internal_reloc *)
2898 bfd_malloc (max_reloc_count
2899 * sizeof (struct internal_reloc)));
2900 if ((finfo.internal_syms == NULL && max_sym_count > 0)
2901 || (finfo.sec_ptrs == NULL && max_sym_count > 0)
2902 || (finfo.sym_indices == NULL && max_sym_count > 0)
2903 || finfo.outsyms == NULL
2904 || (finfo.linenos == NULL && max_lineno_count > 0)
2905 || (finfo.contents == NULL && max_contents_size > 0)
2906 || (finfo.external_relocs == NULL && max_reloc_count > 0)
2907 || (! info->relocateable
2908 && finfo.internal_relocs == NULL
2909 && max_reloc_count > 0))
2910 goto error_return;
2911
2912 /* We now know the position of everything in the file, except that
2913 we don't know the size of the symbol table and therefore we don't
2914 know where the string table starts. We just build the string
2915 table in memory as we go along. We process all the relocations
2916 for a single input file at once. */
2917 obj_raw_syment_count (abfd) = 0;
2918
2919 if (coff_backend_info (abfd)->_bfd_coff_start_final_link)
2920 {
2921 if (! bfd_coff_start_final_link (abfd, info))
2922 goto error_return;
2923 }
2924
2925 for (o = abfd->sections; o != NULL; o = o->next)
2926 {
2927 for (p = o->link_order_head; p != NULL; p = p->next)
2928 {
2929 if (p->type == bfd_indirect_link_order
2930 && (bfd_get_flavour (p->u.indirect.section->owner)
2931 == bfd_target_coff_flavour))
2932 {
2933 sub = p->u.indirect.section->owner;
2934 #ifdef POWERPC_LE_PE
2935 if (! sub->output_has_begun && !ppc_do_last(sub))
2936 #else
2937 if (! sub->output_has_begun)
2938 #endif
2939 {
2940 if (! _bfd_coff_link_input_bfd (&finfo, sub))
2941 goto error_return;
2942 sub->output_has_begun = true;
2943 }
2944 }
2945 else if (p->type == bfd_section_reloc_link_order
2946 || p->type == bfd_symbol_reloc_link_order)
2947 {
2948 if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p))
2949 goto error_return;
2950 }
2951 else
2952 {
2953 if (! _bfd_default_link_order (abfd, info, o, p))
2954 goto error_return;
2955 }
2956 }
2957 }
2958
2959 #ifdef POWERPC_LE_PE
2960 {
2961 extern bfd* ppc_get_last();
2962 bfd* last_one = ppc_get_last();
2963 if (last_one)
2964 {
2965 if (! _bfd_coff_link_input_bfd (&finfo, last_one))
2966 goto error_return;
2967 }
2968 last_one->output_has_begun = true;
2969 }
2970 #endif
2971
2972 /* Free up the buffers used by _bfd_coff_link_input_bfd. */
2973
2974 coff_debug_merge_hash_table_free (&finfo.debug_merge);
2975 debug_merge_allocated = false;
2976
2977 if (finfo.internal_syms != NULL)
2978 {
2979 free (finfo.internal_syms);
2980 finfo.internal_syms = NULL;
2981 }
2982 if (finfo.sec_ptrs != NULL)
2983 {
2984 free (finfo.sec_ptrs);
2985 finfo.sec_ptrs = NULL;
2986 }
2987 if (finfo.sym_indices != NULL)
2988 {
2989 free (finfo.sym_indices);
2990 finfo.sym_indices = NULL;
2991 }
2992 if (finfo.linenos != NULL)
2993 {
2994 free (finfo.linenos);
2995 finfo.linenos = NULL;
2996 }
2997 if (finfo.contents != NULL)
2998 {
2999 free (finfo.contents);
3000 finfo.contents = NULL;
3001 }
3002 if (finfo.external_relocs != NULL)
3003 {
3004 free (finfo.external_relocs);
3005 finfo.external_relocs = NULL;
3006 }
3007 if (finfo.internal_relocs != NULL)
3008 {
3009 free (finfo.internal_relocs);
3010 finfo.internal_relocs = NULL;
3011 }
3012
3013 /* The value of the last C_FILE symbol is supposed to be the symbol
3014 index of the first external symbol. Write it out again if
3015 necessary. */
3016 if (finfo.last_file_index != -1
3017 && (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd))
3018 {
3019 finfo.last_file.n_value = obj_raw_syment_count (abfd);
3020 bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
3021 (PTR) finfo.outsyms);
3022 if (bfd_seek (abfd,
3023 (obj_sym_filepos (abfd)
3024 + finfo.last_file_index * symesz),
3025 SEEK_SET) != 0
3026 || bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz)
3027 return false;
3028 }
3029
3030 /* Write out the global symbols. */
3031 finfo.failed = false;
3032 coff_link_hash_traverse (coff_hash_table (info), _bfd_coff_write_global_sym,
3033 (PTR) &finfo);
3034 if (finfo.failed)
3035 goto error_return;
3036
3037 /* The outsyms buffer is used by _bfd_coff_write_global_sym. */
3038 if (finfo.outsyms != NULL)
3039 {
3040 free (finfo.outsyms);
3041 finfo.outsyms = NULL;
3042 }
3043
3044 if (info->relocateable)
3045 {
3046 /* Now that we have written out all the global symbols, we know
3047 the symbol indices to use for relocs against them, and we can
3048 finally write out the relocs. */
3049 external_relocs = ((bfd_byte *)
3050 bfd_malloc (max_output_reloc_count * relsz));
3051 if (external_relocs == NULL)
3052 goto error_return;
3053
3054 for (o = abfd->sections; o != NULL; o = o->next)
3055 {
3056 struct internal_reloc *irel;
3057 struct internal_reloc *irelend;
3058 struct coff_link_hash_entry **rel_hash;
3059 bfd_byte *erel;
3060
3061 if (o->reloc_count == 0)
3062 continue;
3063
3064 irel = finfo.section_info[o->target_index].relocs;
3065 irelend = irel + o->reloc_count;
3066 rel_hash = finfo.section_info[o->target_index].rel_hashes;
3067 erel = external_relocs;
3068 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
3069 {
3070 if (*rel_hash != NULL)
3071 {
3072 BFD_ASSERT ((*rel_hash)->indx >= 0);
3073 irel->r_symndx = (*rel_hash)->indx;
3074 }
3075 bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
3076 }
3077
3078 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
3079 || bfd_write ((PTR) external_relocs, relsz, o->reloc_count,
3080 abfd) != relsz * o->reloc_count)
3081 goto error_return;
3082 }
3083
3084 free (external_relocs);
3085 external_relocs = NULL;
3086 }
3087
3088 /* Free up the section information. */
3089 if (finfo.section_info != NULL)
3090 {
3091 unsigned int i;
3092
3093 for (i = 0; i < abfd->section_count; i++)
3094 {
3095 if (finfo.section_info[i].relocs != NULL)
3096 free (finfo.section_info[i].relocs);
3097 if (finfo.section_info[i].rel_hashes != NULL)
3098 free (finfo.section_info[i].rel_hashes);
3099 }
3100 free (finfo.section_info);
3101 finfo.section_info = NULL;
3102 }
3103
3104 /* Write out the string table. */
3105 if (obj_raw_syment_count (abfd) != 0)
3106 {
3107 if (bfd_seek (abfd,
3108 (obj_sym_filepos (abfd)
3109 + obj_raw_syment_count (abfd) * symesz),
3110 SEEK_SET) != 0)
3111 return false;
3112
3113 #if STRING_SIZE_SIZE == 4
3114 bfd_h_put_32 (abfd,
3115 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
3116 (bfd_byte *) strbuf);
3117 #else
3118 #error Change bfd_h_put_32
3119 #endif
3120
3121 if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE)
3122 return false;
3123
3124 if (! _bfd_stringtab_emit (abfd, finfo.strtab))
3125 return false;
3126 }
3127
3128 _bfd_stringtab_free (finfo.strtab);
3129
3130 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
3131 not try to write out the symbols. */
3132 bfd_get_symcount (abfd) = 0;
3133
3134 return true;
3135
3136 error_return:
3137 if (debug_merge_allocated)
3138 coff_debug_merge_hash_table_free (&finfo.debug_merge);
3139 if (finfo.strtab != NULL)
3140 _bfd_stringtab_free (finfo.strtab);
3141 if (finfo.section_info != NULL)
3142 {
3143 unsigned int i;
3144
3145 for (i = 0; i < abfd->section_count; i++)
3146 {
3147 if (finfo.section_info[i].relocs != NULL)
3148 free (finfo.section_info[i].relocs);
3149 if (finfo.section_info[i].rel_hashes != NULL)
3150 free (finfo.section_info[i].rel_hashes);
3151 }
3152 free (finfo.section_info);
3153 }
3154 if (finfo.internal_syms != NULL)
3155 free (finfo.internal_syms);
3156 if (finfo.sec_ptrs != NULL)
3157 free (finfo.sec_ptrs);
3158 if (finfo.sym_indices != NULL)
3159 free (finfo.sym_indices);
3160 if (finfo.outsyms != NULL)
3161 free (finfo.outsyms);
3162 if (finfo.linenos != NULL)
3163 free (finfo.linenos);
3164 if (finfo.contents != NULL)
3165 free (finfo.contents);
3166 if (finfo.external_relocs != NULL)
3167 free (finfo.external_relocs);
3168 if (finfo.internal_relocs != NULL)
3169 free (finfo.internal_relocs);
3170 if (external_relocs != NULL)
3171 free (external_relocs);
3172 return false;
3173 }
3174 #endif
3175 \f
3176
3177 /* The transfer vectors that lead the outside world to all of the above. */
3178
3179 #ifdef TARGET_LITTLE_SYM
3180 const bfd_target
3181 TARGET_LITTLE_SYM =
3182 {
3183 TARGET_LITTLE_NAME, /* name or coff-arm-little */
3184 bfd_target_coff_flavour,
3185 BFD_ENDIAN_LITTLE, /* data byte order is little */
3186 BFD_ENDIAN_LITTLE, /* header byte order is little */
3187
3188 (HAS_RELOC | EXEC_P | /* FIXME: object flags */
3189 HAS_LINENO | HAS_DEBUG |
3190 HAS_SYMS | HAS_LOCALS | WP_TEXT),
3191
3192 #ifndef COFF_WITH_PE
3193 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
3194 #else
3195 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
3196 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
3197 #endif
3198
3199 0, /* leading char */
3200 '/', /* ar_pad_char */
3201 15, /* ar_max_namelen??? FIXMEmgo */
3202
3203 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
3204 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
3205 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
3206
3207 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
3208 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
3209 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
3210
3211 {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
3212 bfd_generic_archive_p, /* _bfd_dummy_target */ coff_object_p },
3213 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
3214 bfd_false},
3215 {bfd_false, coff_write_object_contents, /* bfd_write_contents */
3216 _bfd_write_archive_contents, bfd_false},
3217
3218 BFD_JUMP_TABLE_GENERIC (coff),
3219 BFD_JUMP_TABLE_COPY (coff),
3220 BFD_JUMP_TABLE_CORE (_bfd_nocore),
3221 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
3222 BFD_JUMP_TABLE_SYMBOLS (coff),
3223 BFD_JUMP_TABLE_RELOCS (coff),
3224 BFD_JUMP_TABLE_WRITE (coff),
3225 BFD_JUMP_TABLE_LINK (coff),
3226 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
3227
3228 COFF_SWAP_TABLE,
3229 };
3230 #endif
3231
3232 #ifdef TARGET_BIG_SYM
3233 const bfd_target
3234 TARGET_BIG_SYM =
3235 {
3236 TARGET_BIG_NAME,
3237 bfd_target_coff_flavour,
3238 BFD_ENDIAN_BIG, /* data byte order is big */
3239 BFD_ENDIAN_BIG, /* header byte order is big */
3240
3241 (HAS_RELOC | EXEC_P | /* FIXME: object flags */
3242 HAS_LINENO | HAS_DEBUG |
3243 HAS_SYMS | HAS_LOCALS | WP_TEXT),
3244
3245 #ifndef COFF_WITH_PE
3246 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
3247 #else
3248 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
3249 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
3250 #endif
3251
3252 0, /* leading char */
3253 '/', /* ar_pad_char */
3254 15, /* ar_max_namelen??? FIXMEmgo */
3255
3256 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
3257 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
3258 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
3259
3260 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
3261 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
3262 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
3263
3264 {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
3265 bfd_generic_archive_p, /* _bfd_dummy_target */ coff_object_p },
3266 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
3267 bfd_false},
3268 {bfd_false, coff_write_object_contents, /* bfd_write_contents */
3269 _bfd_write_archive_contents, bfd_false},
3270
3271 BFD_JUMP_TABLE_GENERIC (coff),
3272 BFD_JUMP_TABLE_COPY (coff),
3273 BFD_JUMP_TABLE_CORE (_bfd_nocore),
3274 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
3275 BFD_JUMP_TABLE_SYMBOLS (coff),
3276 BFD_JUMP_TABLE_RELOCS (coff),
3277 BFD_JUMP_TABLE_WRITE (coff),
3278 BFD_JUMP_TABLE_LINK (coff),
3279 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
3280
3281 COFF_SWAP_TABLE,
3282 };
3283
3284 #endif
GDB Binutils - Deliverables
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