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Change linker's default behaviour - it will now reject binary files whoes
[binutils.git] / bfd / nlm32-ppc.c
blob9f5f9c053e0f1ca57900aa174a1fcccb754b84a8
1 /* Support for 32-bit PowerPC NLM (NetWare Loadable Module)
2 Copyright 1994, 1995, 2000, 2001, 2002 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20 #include "bfd.h"
21 #include "sysdep.h"
22 #include "libbfd.h"
23
24 /* The format of a PowerPC NLM changed. Define OLDFORMAT to get the
25 old format. */
26
27 #define ARCH_SIZE 32
28
29 #include "nlm/ppc-ext.h"
30 #define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header
31
32 #include "libnlm.h"
33
34 #ifdef OLDFORMAT
35 static bfd_boolean nlm_powerpc_backend_object_p
36 PARAMS ((bfd *));
37 static bfd_boolean nlm_powerpc_write_prefix
38 PARAMS ((bfd *));
39 #endif
40
41 static bfd_boolean nlm_powerpc_read_reloc
42 PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *));
43 static bfd_boolean nlm_powerpc_mangle_relocs
44 PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type));
45 static bfd_boolean nlm_powerpc_read_import
46 PARAMS ((bfd *, nlmNAME(symbol_type) *));
47
48 #ifdef OLDFORMAT
49 static bfd_boolean nlm_powerpc_write_reloc
50 PARAMS ((bfd *, asection *, arelent *, int));
51 #endif
52
53 static bfd_boolean nlm_powerpc_write_import
54 PARAMS ((bfd *, asection *, arelent *));
55 static bfd_boolean nlm_powerpc_write_external
56 PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *));
57
58 #ifndef OLDFORMAT
59 static bfd_boolean nlm_powerpc_set_public_section
60 PARAMS ((bfd *, nlmNAME(symbol_type) *));
61 static bfd_vma nlm_powerpc_get_public_offset
62 PARAMS ((bfd *, asymbol *));
63 #endif
64 \f
65 #ifdef OLDFORMAT
66
67 /* The prefix header is only used in the old format. */
68
69 /* PowerPC NLM's have a prefix header before the standard NLM. This
70 function reads it in, verifies the version, and seeks the bfd to
71 the location before the regular NLM header. */
72
73 static bfd_boolean
74 nlm_powerpc_backend_object_p (abfd)
75 bfd *abfd;
76 {
77 struct nlm32_powerpc_external_prefix_header s;
78
79 if (bfd_bread ((PTR) &s, (bfd_size_type) sizeof s, abfd) != sizeof s)
80 return FALSE;
81
82 if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0
83 || H_GET_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION)
84 return FALSE;
85
86 return TRUE;
87 }
88
89 /* Write out the prefix. */
90
91 static bfd_boolean
92 nlm_powerpc_write_prefix (abfd)
93 bfd *abfd;
94 {
95 struct nlm32_powerpc_external_prefix_header s;
96
97 memset (&s, 0, sizeof s);
98 memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature);
99 H_PUT_32 (abfd, NLM32_POWERPC_HEADER_VERSION, s.headerVersion);
100 H_PUT_32 (abfd, 0, s.origins);
101
102 /* FIXME: What should we do about the date? */
103
104 if (bfd_bwrite ((PTR) &s, (bfd_size_type) sizeof s, abfd) != sizeof s)
105 return FALSE;
106
107 return TRUE;
108 }
109
110 #endif /* OLDFORMAT */
111 \f
112 #ifndef OLDFORMAT
113
114 /* There is only one type of reloc in a PowerPC NLM. */
115
116 static reloc_howto_type nlm_powerpc_howto =
117 HOWTO (0, /* type */
118 0, /* rightshift */
119 2, /* size (0 = byte, 1 = short, 2 = long) */
120 32, /* bitsize */
121 FALSE, /* pc_relative */
122 0, /* bitpos */
123 complain_overflow_bitfield, /* complain_on_overflow */
124 0, /* special_function */
125 "32", /* name */
126 TRUE, /* partial_inplace */
127 0xffffffff, /* src_mask */
128 0xffffffff, /* dst_mask */
129 FALSE); /* pcrel_offset */
130
131 /* Read a PowerPC NLM reloc. */
132
133 static bfd_boolean
134 nlm_powerpc_read_reloc (abfd, sym, secp, rel)
135 bfd *abfd;
136 nlmNAME(symbol_type) *sym;
137 asection **secp;
138 arelent *rel;
139 {
140 bfd_byte temp[4];
141 bfd_vma val;
142 const char *name;
143
144 if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
145 return FALSE;
146
147 val = bfd_get_32 (abfd, temp);
148
149 /* The value is a word offset into either the code or data segment.
150 This is the location which needs to be adjusted.
151
152 The high bit is 0 if the value is an offset into the data
153 segment, or 1 if the value is an offset into the text segment.
154
155 If this is a relocation fixup rather than an imported symbol (the
156 sym argument is NULL), then the second most significant bit is 0
157 if the address of the data segment should be added to the
158 location addressed by the value, or 1 if the address of the text
159 segment should be added.
160
161 If this is an imported symbol, the second most significant bit is
162 not used and must be 0. */
163
164 if ((val & NLM_HIBIT) == 0)
165 name = NLM_INITIALIZED_DATA_NAME;
166 else
167 {
168 name = NLM_CODE_NAME;
169 val &=~ NLM_HIBIT;
170 }
171 *secp = bfd_get_section_by_name (abfd, name);
172
173 if (sym == NULL)
174 {
175 if ((val & (NLM_HIBIT >> 1)) == 0)
176 name = NLM_INITIALIZED_DATA_NAME;
177 else
178 {
179 name = NLM_CODE_NAME;
180 val &=~ (NLM_HIBIT >> 1);
181 }
182 rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr;
183 }
184
185 rel->howto = &nlm_powerpc_howto;
186
187 rel->address = val << 2;
188 rel->addend = 0;
189
190 return TRUE;
191 }
192
193 #else /* OLDFORMAT */
194
195 /* This reloc handling is only applicable to the old format. */
196
197 /* How to process the various reloc types. PowerPC NLMs use XCOFF
198 reloc types, and I have just copied the XCOFF reloc table here. */
199
200 static reloc_howto_type nlm_powerpc_howto_table[] =
201 {
202 /* Standard 32 bit relocation. */
203 HOWTO (0, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_bitfield, /* complain_on_overflow */
210 0, /* special_function */
211 "R_POS", /* name */
212 TRUE, /* partial_inplace */
213 0xffffffff, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* 32 bit relocation, but store negative value. */
218 HOWTO (1, /* type */
219 0, /* rightshift */
220 -2, /* size (0 = byte, 1 = short, 2 = long) */
221 32, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_bitfield, /* complain_on_overflow */
225 0, /* special_function */
226 "R_NEG", /* name */
227 TRUE, /* partial_inplace */
228 0xffffffff, /* src_mask */
229 0xffffffff, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* 32 bit PC relative relocation. */
233 HOWTO (2, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 TRUE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_signed, /* complain_on_overflow */
240 0, /* special_function */
241 "R_REL", /* name */
242 TRUE, /* partial_inplace */
243 0xffffffff, /* src_mask */
244 0xffffffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* 16 bit TOC relative relocation. */
248 HOWTO (3, /* type */
249 0, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_signed, /* complain_on_overflow */
255 0, /* special_function */
256 "R_TOC", /* name */
257 TRUE, /* partial_inplace */
258 0xffff, /* src_mask */
259 0xffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* I don't really know what this is. */
263 HOWTO (4, /* type */
264 1, /* rightshift */
265 2, /* size (0 = byte, 1 = short, 2 = long) */
266 32, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_bitfield, /* complain_on_overflow */
270 0, /* special_function */
271 "R_RTB", /* name */
272 TRUE, /* partial_inplace */
273 0xffffffff, /* src_mask */
274 0xffffffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* External TOC relative symbol. */
278 HOWTO (5, /* type */
279 0, /* rightshift */
280 2, /* size (0 = byte, 1 = short, 2 = long) */
281 16, /* bitsize */
282 FALSE, /* pc_relative */
283 0, /* bitpos */
284 complain_overflow_bitfield, /* complain_on_overflow */
285 0, /* special_function */
286 "R_GL", /* name */
287 TRUE, /* partial_inplace */
288 0xffff, /* src_mask */
289 0xffff, /* dst_mask */
290 FALSE), /* pcrel_offset */
291
292 /* Local TOC relative symbol. */
293 HOWTO (6, /* type */
294 0, /* rightshift */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
296 16, /* bitsize */
297 FALSE, /* pc_relative */
298 0, /* bitpos */
299 complain_overflow_bitfield, /* complain_on_overflow */
300 0, /* special_function */
301 "R_TCL", /* name */
302 TRUE, /* partial_inplace */
303 0xffff, /* src_mask */
304 0xffff, /* dst_mask */
305 FALSE), /* pcrel_offset */
306
307 { 7 },
308
309 /* Non modifiable absolute branch. */
310 HOWTO (8, /* type */
311 0, /* rightshift */
312 2, /* size (0 = byte, 1 = short, 2 = long) */
313 26, /* bitsize */
314 FALSE, /* pc_relative */
315 0, /* bitpos */
316 complain_overflow_bitfield, /* complain_on_overflow */
317 0, /* special_function */
318 "R_BA", /* name */
319 TRUE, /* partial_inplace */
320 0x3fffffc, /* src_mask */
321 0x3fffffc, /* dst_mask */
322 FALSE), /* pcrel_offset */
323
324 { 9 },
325
326 /* Non modifiable relative branch. */
327 HOWTO (0xa, /* type */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 26, /* bitsize */
331 TRUE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_signed, /* complain_on_overflow */
334 0, /* special_function */
335 "R_BR", /* name */
336 TRUE, /* partial_inplace */
337 0x3fffffc, /* src_mask */
338 0x3fffffc, /* dst_mask */
339 FALSE), /* pcrel_offset */
340
341 { 0xb },
342
343 /* Indirect load. */
344 HOWTO (0xc, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 16, /* bitsize */
348 FALSE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_bitfield, /* complain_on_overflow */
351 0, /* special_function */
352 "R_RL", /* name */
353 TRUE, /* partial_inplace */
354 0xffff, /* src_mask */
355 0xffff, /* dst_mask */
356 FALSE), /* pcrel_offset */
357
358 /* Load address. */
359 HOWTO (0xd, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 FALSE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_bitfield, /* complain_on_overflow */
366 0, /* special_function */
367 "R_RLA", /* name */
368 TRUE, /* partial_inplace */
369 0xffff, /* src_mask */
370 0xffff, /* dst_mask */
371 FALSE), /* pcrel_offset */
372
373 { 0xe },
374
375 /* Non-relocating reference. */
376 HOWTO (0xf, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 32, /* bitsize */
380 FALSE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_bitfield, /* complain_on_overflow */
383 0, /* special_function */
384 "R_REF", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0, /* dst_mask */
388 FALSE), /* pcrel_offset */
389
390 { 0x10 },
391 { 0x11 },
392
393 /* TOC relative indirect load. */
394 HOWTO (0x12, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_bitfield, /* complain_on_overflow */
401 0, /* special_function */
402 "R_TRL", /* name */
403 TRUE, /* partial_inplace */
404 0xffff, /* src_mask */
405 0xffff, /* dst_mask */
406 FALSE), /* pcrel_offset */
407
408 /* TOC relative load address. */
409 HOWTO (0x13, /* type */
410 0, /* rightshift */
411 2, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_bitfield, /* complain_on_overflow */
416 0, /* special_function */
417 "R_TRLA", /* name */
418 TRUE, /* partial_inplace */
419 0xffff, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Modifiable relative branch. */
424 HOWTO (0x14, /* type */
425 1, /* rightshift */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
427 32, /* bitsize */
428 FALSE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_bitfield, /* complain_on_overflow */
431 0, /* special_function */
432 "R_RRTBI", /* name */
433 TRUE, /* partial_inplace */
434 0xffffffff, /* src_mask */
435 0xffffffff, /* dst_mask */
436 FALSE), /* pcrel_offset */
437
438 /* Modifiable absolute branch. */
439 HOWTO (0x15, /* type */
440 1, /* rightshift */
441 2, /* size (0 = byte, 1 = short, 2 = long) */
442 32, /* bitsize */
443 FALSE, /* pc_relative */
444 0, /* bitpos */
445 complain_overflow_bitfield, /* complain_on_overflow */
446 0, /* special_function */
447 "R_RRTBA", /* name */
448 TRUE, /* partial_inplace */
449 0xffffffff, /* src_mask */
450 0xffffffff, /* dst_mask */
451 FALSE), /* pcrel_offset */
452
453 /* Modifiable call absolute indirect. */
454 HOWTO (0x16, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 16, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 0, /* special_function */
462 "R_CAI", /* name */
463 TRUE, /* partial_inplace */
464 0xffff, /* src_mask */
465 0xffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 /* Modifiable call relative. */
469 HOWTO (0x17, /* type */
470 0, /* rightshift */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
472 16, /* bitsize */
473 FALSE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_bitfield, /* complain_on_overflow */
476 0, /* special_function */
477 "R_REL", /* name */
478 TRUE, /* partial_inplace */
479 0xffff, /* src_mask */
480 0xffff, /* dst_mask */
481 FALSE), /* pcrel_offset */
482
483 /* Modifiable branch absolute. */
484 HOWTO (0x18, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 16, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 0, /* special_function */
492 "R_RBA", /* name */
493 TRUE, /* partial_inplace */
494 0xffff, /* src_mask */
495 0xffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Modifiable branch absolute. */
499 HOWTO (0x19, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 16, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 0, /* special_function */
507 "R_RBAC", /* name */
508 TRUE, /* partial_inplace */
509 0xffff, /* src_mask */
510 0xffff, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Modifiable branch relative. */
514 HOWTO (0x1a, /* type */
515 0, /* rightshift */
516 2, /* size (0 = byte, 1 = short, 2 = long) */
517 26, /* bitsize */
518 FALSE, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_signed, /* complain_on_overflow */
521 0, /* special_function */
522 "R_REL", /* name */
523 TRUE, /* partial_inplace */
524 0xffff, /* src_mask */
525 0xffff, /* dst_mask */
526 FALSE), /* pcrel_offset */
527
528 /* Modifiable branch absolute. */
529 HOWTO (0x1b, /* type */
530 0, /* rightshift */
531 2, /* size (0 = byte, 1 = short, 2 = long) */
532 16, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_bitfield, /* complain_on_overflow */
536 0, /* special_function */
537 "R_REL", /* name */
538 TRUE, /* partial_inplace */
539 0xffff, /* src_mask */
540 0xffff, /* dst_mask */
541 FALSE) /* pcrel_offset */
542 };
543
544 #define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \
545 / sizeof nlm_powerpc_howto_table[0])
546
547 /* Read a PowerPC NLM reloc. */
548
549 static bfd_boolean
550 nlm_powerpc_read_reloc (abfd, sym, secp, rel)
551 bfd *abfd;
552 nlmNAME(symbol_type) *sym;
553 asection **secp;
554 arelent *rel;
555 {
556 struct nlm32_powerpc_external_reloc ext;
557 bfd_vma l_vaddr;
558 unsigned long l_symndx;
559 int l_rtype;
560 int l_rsecnm;
561 asection *code_sec, *data_sec, *bss_sec;
562
563 /* Read the reloc from the file. */
564 if (bfd_bread (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext)
565 return FALSE;
566
567 /* Swap in the fields. */
568 l_vaddr = H_GET_32 (abfd, ext.l_vaddr);
569 l_symndx = H_GET_32 (abfd, ext.l_symndx);
570 l_rtype = H_GET_16 (abfd, ext.l_rtype);
571 l_rsecnm = H_GET_16 (abfd, ext.l_rsecnm);
572
573 /* Get the sections now, for convenience. */
574 code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
575 data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
576 bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
577
578 /* Work out the arelent fields. */
579 if (sym != NULL)
580 {
581 /* This is an import. sym_ptr_ptr is filled in by
582 nlm_canonicalize_reloc. */
583 rel->sym_ptr_ptr = NULL;
584 }
585 else
586 {
587 asection *sec;
588
589 if (l_symndx == 0)
590 sec = code_sec;
591 else if (l_symndx == 1)
592 sec = data_sec;
593 else if (l_symndx == 2)
594 sec = bss_sec;
595 else
596 {
597 bfd_set_error (bfd_error_bad_value);
598 return FALSE;
599 }
600
601 rel->sym_ptr_ptr = sec->symbol_ptr_ptr;
602 }
603
604 rel->addend = 0;
605
606 BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT);
607
608 rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff);
609
610 BFD_ASSERT (rel->howto->name != NULL
611 && ((l_rtype & 0x8000) != 0
612 ? (rel->howto->complain_on_overflow
613 == complain_overflow_signed)
614 : (rel->howto->complain_on_overflow
615 == complain_overflow_bitfield))
616 && ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1);
617
618 if (l_rsecnm == 0)
619 *secp = code_sec;
620 else if (l_rsecnm == 1)
621 {
622 *secp = data_sec;
623 l_vaddr -= bfd_section_size (abfd, code_sec);
624 }
625 else
626 {
627 bfd_set_error (bfd_error_bad_value);
628 return FALSE;
629 }
630
631 rel->address = l_vaddr;
632
633 return TRUE;
634 }
635
636 #endif /* OLDFORMAT */
637
638 /* Mangle PowerPC NLM relocs for output. */
639
640 static bfd_boolean
641 nlm_powerpc_mangle_relocs (abfd, sec, data, offset, count)
642 bfd *abfd ATTRIBUTE_UNUSED;
643 asection *sec ATTRIBUTE_UNUSED;
644 PTR data ATTRIBUTE_UNUSED;
645 bfd_vma offset ATTRIBUTE_UNUSED;
646 bfd_size_type count ATTRIBUTE_UNUSED;
647 {
648 return TRUE;
649 }
650
651 /* Read a PowerPC NLM import record */
652
653 static bfd_boolean
654 nlm_powerpc_read_import (abfd, sym)
655 bfd *abfd;
656 nlmNAME(symbol_type) *sym;
657 {
658 struct nlm_relent *nlm_relocs; /* relocation records for symbol */
659 bfd_size_type rcount; /* number of relocs */
660 bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* temporary 32-bit value */
661 unsigned char symlength; /* length of symbol name */
662 char *name;
663
664 if (bfd_bread ((PTR) &symlength, (bfd_size_type) sizeof (symlength), abfd)
665 != sizeof (symlength))
666 return FALSE;
667 sym -> symbol.the_bfd = abfd;
668 name = bfd_alloc (abfd, (bfd_size_type) symlength + 1);
669 if (name == NULL)
670 return FALSE;
671 if (bfd_bread (name, (bfd_size_type) symlength, abfd) != symlength)
672 return FALSE;
673 name[symlength] = '\0';
674 sym -> symbol.name = name;
675 sym -> symbol.flags = 0;
676 sym -> symbol.value = 0;
677 sym -> symbol.section = bfd_und_section_ptr;
678 if (bfd_bread ((PTR) temp, (bfd_size_type) sizeof (temp), abfd)
679 != sizeof (temp))
680 return FALSE;
681 rcount = H_GET_32 (abfd, temp);
682 nlm_relocs = ((struct nlm_relent *)
683 bfd_alloc (abfd, rcount * sizeof (struct nlm_relent)));
684 if (nlm_relocs == (struct nlm_relent *) NULL)
685 return FALSE;
686 sym -> relocs = nlm_relocs;
687 sym -> rcnt = 0;
688 while (sym -> rcnt < rcount)
689 {
690 asection *section;
691
692 if (! nlm_powerpc_read_reloc (abfd, sym, &section, &nlm_relocs -> reloc))
693 return FALSE;
694 nlm_relocs -> section = section;
695 nlm_relocs++;
696 sym -> rcnt++;
697 }
698 return TRUE;
699 }
700
701 #ifndef OLDFORMAT
702
703 /* Write a PowerPC NLM reloc. */
704
705 static bfd_boolean
706 nlm_powerpc_write_import (abfd, sec, rel)
707 bfd *abfd;
708 asection *sec;
709 arelent *rel;
710 {
711 asymbol *sym;
712 bfd_vma val;
713 bfd_byte temp[4];
714
715 /* PowerPC NetWare only supports one kind of reloc. */
716 if (rel->addend != 0
717 || rel->howto == NULL
718 || rel->howto->rightshift != 0
719 || rel->howto->size != 2
720 || rel->howto->bitsize != 32
721 || rel->howto->bitpos != 0
722 || rel->howto->pc_relative
723 || (rel->howto->src_mask != 0xffffffff && rel->addend != 0)
724 || rel->howto->dst_mask != 0xffffffff)
725 {
726 bfd_set_error (bfd_error_invalid_operation);
727 return FALSE;
728 }
729
730 sym = *rel->sym_ptr_ptr;
731
732 /* The value we write out is the offset into the appropriate
733 segment, rightshifted by two. This offset is the section vma,
734 adjusted by the vma of the lowest section in that segment, plus
735 the address of the relocation. */
736 val = bfd_get_section_vma (abfd, sec) + rel->address;
737 if ((val & 3) != 0)
738 {
739 bfd_set_error (bfd_error_bad_value);
740 return FALSE;
741 }
742 val >>= 2;
743
744 /* The high bit is 0 if the reloc is in the data section, or 1 if
745 the reloc is in the code section. */
746 if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
747 val -= nlm_get_data_low (abfd);
748 else
749 {
750 val -= nlm_get_text_low (abfd);
751 val |= NLM_HIBIT;
752 }
753
754 if (! bfd_is_und_section (bfd_get_section (sym)))
755 {
756 /* This is an internal relocation fixup. The second most
757 significant bit is 0 if this is a reloc against the data
758 segment, or 1 if it is a reloc against the text segment. */
759 if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
760 val |= NLM_HIBIT >> 1;
761 }
762
763 bfd_put_32 (abfd, val, temp);
764 if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
765 return FALSE;
766
767 return TRUE;
768 }
769
770 #else /* OLDFORMAT */
771
772 /* This is used for the reloc handling in the old format. */
773
774 /* Write a PowerPC NLM reloc. */
775
776 static bfd_boolean
777 nlm_powerpc_write_reloc (abfd, sec, rel, indx)
778 bfd *abfd;
779 asection *sec;
780 arelent *rel;
781 int indx;
782 {
783 struct nlm32_powerpc_external_reloc ext;
784 asection *code_sec, *data_sec, *bss_sec;
785 asymbol *sym;
786 asection *symsec;
787 unsigned long l_symndx;
788 int l_rtype;
789 int l_rsecnm;
790 reloc_howto_type *howto;
791 bfd_size_type address;
792
793 /* Get the sections now, for convenience. */
794 code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
795 data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
796 bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
797
798 sym = *rel->sym_ptr_ptr;
799 symsec = bfd_get_section (sym);
800 if (indx != -1)
801 {
802 BFD_ASSERT (bfd_is_und_section (symsec));
803 l_symndx = indx + 3;
804 }
805 else
806 {
807 if (symsec == code_sec)
808 l_symndx = 0;
809 else if (symsec == data_sec)
810 l_symndx = 1;
811 else if (symsec == bss_sec)
812 l_symndx = 2;
813 else
814 {
815 bfd_set_error (bfd_error_bad_value);
816 return FALSE;
817 }
818 }
819
820 H_PUT_32 (abfd, l_symndx, ext.l_symndx);
821
822 for (howto = nlm_powerpc_howto_table;
823 howto < nlm_powerpc_howto_table + HOWTO_COUNT;
824 howto++)
825 {
826 if (howto->rightshift == rel->howto->rightshift
827 && howto->size == rel->howto->size
828 && howto->bitsize == rel->howto->bitsize
829 && howto->pc_relative == rel->howto->pc_relative
830 && howto->bitpos == rel->howto->bitpos
831 && (howto->partial_inplace == rel->howto->partial_inplace
832 || (! rel->howto->partial_inplace
833 && rel->addend == 0))
834 && (howto->src_mask == rel->howto->src_mask
835 || (rel->howto->src_mask == 0
836 && rel->addend == 0))
837 && howto->dst_mask == rel->howto->dst_mask
838 && howto->pcrel_offset == rel->howto->pcrel_offset)
839 break;
840 }
841 if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT)
842 {
843 bfd_set_error (bfd_error_bad_value);
844 return FALSE;
845 }
846
847 l_rtype = howto->type;
848 if (howto->complain_on_overflow == complain_overflow_signed)
849 l_rtype |= 0x8000;
850 l_rtype |= (howto->bitsize - 1) << 8;
851 H_PUT_16 (abfd, l_rtype, ext.l_rtype);
852
853 address = rel->address;
854
855 if (sec == code_sec)
856 l_rsecnm = 0;
857 else if (sec == data_sec)
858 {
859 l_rsecnm = 1;
860 address += bfd_section_size (abfd, code_sec);
861 }
862 else
863 {
864 bfd_set_error (bfd_error_bad_value);
865 return FALSE;
866 }
867
868 H_PUT_16 (abfd, l_rsecnm, ext.l_rsecnm);
869 H_PUT_32 (abfd, address, ext.l_vaddr);
870
871 if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext)
872 return FALSE;
873
874 return TRUE;
875 }
876
877 /* Write a PowerPC NLM import. */
878
879 static bfd_boolean
880 nlm_powerpc_write_import (abfd, sec, rel)
881 bfd *abfd;
882 asection *sec;
883 arelent *rel;
884 {
885 return nlm_powerpc_write_reloc (abfd, sec, rel, -1);
886 }
887
888 #endif /* OLDFORMAT */
889
890 /* Write a PowerPC NLM external symbol. This routine keeps a static
891 count of the symbol index. FIXME: I don't know if this is
892 necessary, and the index never gets reset. */
893
894 static bfd_boolean
895 nlm_powerpc_write_external (abfd, count, sym, relocs)
896 bfd *abfd;
897 bfd_size_type count;
898 asymbol *sym;
899 struct reloc_and_sec *relocs;
900 {
901 unsigned int i;
902 bfd_byte len;
903 unsigned char temp[NLM_TARGET_LONG_SIZE];
904 #ifdef OLDFORMAT
905 static int indx;
906 #endif
907
908 len = strlen (sym->name);
909 if ((bfd_bwrite (&len, (bfd_size_type) sizeof (bfd_byte), abfd)
910 != sizeof (bfd_byte))
911 || bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len)
912 return FALSE;
913
914 bfd_put_32 (abfd, count, temp);
915 if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
916 return FALSE;
917
918 for (i = 0; i < count; i++)
919 {
920 #ifndef OLDFORMAT
921 if (! nlm_powerpc_write_import (abfd, relocs[i].sec, relocs[i].rel))
922 return FALSE;
923 #else
924 if (! nlm_powerpc_write_reloc (abfd, relocs[i].sec,
925 relocs[i].rel, indx))
926 return FALSE;
927 #endif
928 }
929
930 #ifdef OLDFORMAT
931 ++indx;
932 #endif
933
934 return TRUE;
935 }
936 \f
937 #ifndef OLDFORMAT
938
939 /* PowerPC Netware uses a word offset, not a byte offset, for public
940 symbols. */
941
942 /* Set the section for a public symbol. */
943
944 static bfd_boolean
945 nlm_powerpc_set_public_section (abfd, sym)
946 bfd *abfd;
947 nlmNAME(symbol_type) *sym;
948 {
949 if (sym->symbol.value & NLM_HIBIT)
950 {
951 sym->symbol.value &= ~NLM_HIBIT;
952 sym->symbol.flags |= BSF_FUNCTION;
953 sym->symbol.section =
954 bfd_get_section_by_name (abfd, NLM_CODE_NAME);
955 }
956 else
957 {
958 sym->symbol.section =
959 bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
960 }
961
962 sym->symbol.value <<= 2;
963
964 return TRUE;
965 }
966
967 /* Get the offset to write out for a public symbol. */
968
969 static bfd_vma
970 nlm_powerpc_get_public_offset (abfd, sym)
971 bfd *abfd;
972 asymbol *sym;
973 {
974 bfd_vma offset;
975 asection *sec;
976
977 offset = bfd_asymbol_value (sym);
978 sec = bfd_get_section (sym);
979 if (sec->flags & SEC_CODE)
980 {
981 offset -= nlm_get_text_low (abfd);
982 offset |= NLM_HIBIT;
983 }
984 else if (sec->flags & (SEC_DATA | SEC_ALLOC))
985 {
986 /* SEC_ALLOC is for the .bss section. */
987 offset -= nlm_get_data_low (abfd);
988 }
989 else
990 {
991 /* We can't handle an exported symbol that is not in the code or
992 data segment. */
993 bfd_set_error (bfd_error_invalid_operation);
994 /* FIXME: No way to return error. */
995 abort ();
996 }
997
998 return offset;
999 }
1000
1001 #endif /* ! defined (OLDFORMAT) */
1002 \f
1003 #include "nlmswap.h"
1004
1005 static const struct nlm_backend_data nlm32_powerpc_backend =
1006 {
1007 "NetWare PowerPC Module \032",
1008 sizeof (Nlm32_powerpc_External_Fixed_Header),
1009 #ifndef OLDFORMAT
1010 0, /* optional_prefix_size */
1011 #else
1012 sizeof (struct nlm32_powerpc_external_prefix_header),
1013 #endif
1014 bfd_arch_powerpc,
1015 0,
1016 FALSE,
1017 #ifndef OLDFORMAT
1018 0, /* backend_object_p */
1019 0, /* write_prefix */
1020 #else
1021 nlm_powerpc_backend_object_p,
1022 nlm_powerpc_write_prefix,
1023 #endif
1024 nlm_powerpc_read_reloc,
1025 nlm_powerpc_mangle_relocs,
1026 nlm_powerpc_read_import,
1027 nlm_powerpc_write_import,
1028 #ifndef OLDFORMAT
1029 nlm_powerpc_set_public_section,
1030 nlm_powerpc_get_public_offset,
1031 #else
1032 0, /* set_public_section */
1033 0, /* get_public_offset */
1034 #endif
1035 nlm_swap_fixed_header_in,
1036 nlm_swap_fixed_header_out,
1037 nlm_powerpc_write_external,
1038 0, /* write_export */
1039 };
1040
1041 #define TARGET_BIG_NAME "nlm32-powerpc"
1042 #define TARGET_BIG_SYM nlmNAME(powerpc_vec)
1043 #define TARGET_BACKEND_DATA &nlm32_powerpc_backend
1044
1045 #include "nlm-target.h"
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