1 /* BFD back-end for MIPS Extended-Coff files.
2 Copyright (C) 1990-2018 Free Software Foundation, Inc.
3 Original version by Per Bothner.
4 Full support added by Ian Lance Taylor, ian@cygnus.com.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "coff/internal.h"
28 #include "coff/sym.h"
29 #include "coff/symconst.h"
30 #include "coff/ecoff.h"
31 #include "coff/mips.h"
32 #include "libcoff.h"
33 #include "libecoff.h"
34
35 /* Prototypes for static functions. */
36 static bfd_reloc_status_type
37 mips_generic_reloc
38 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
39 static bfd_reloc_status_type
40 mips_refhi_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type
43 mips_reflo_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45 static bfd_reloc_status_type
46 mips_gprel_reloc
47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
48
49
50 /* ECOFF has COFF sections, but the debugging information is stored in
51 a completely different format. ECOFF targets use some of the
52 swapping routines from coffswap.h, and some of the generic COFF
53 routines in coffgen.c, but, unlike the real COFF targets, do not
54 use coffcode.h itself.
55
56 Get the generic COFF swapping routines, except for the reloc,
57 symbol, and lineno ones. Give them ECOFF names. */
58 #define MIPSECOFF
59 #define NO_COFF_RELOCS
60 #define NO_COFF_SYMBOLS
61 #define NO_COFF_LINENOS
62 #define coff_swap_filehdr_in mips_ecoff_swap_filehdr_in
63 #define coff_swap_filehdr_out mips_ecoff_swap_filehdr_out
64 #define coff_swap_aouthdr_in mips_ecoff_swap_aouthdr_in
65 #define coff_swap_aouthdr_out mips_ecoff_swap_aouthdr_out
66 #define coff_swap_scnhdr_in mips_ecoff_swap_scnhdr_in
67 #define coff_swap_scnhdr_out mips_ecoff_swap_scnhdr_out
68
69 #include "coffswap.h"
70
71 /* Get the ECOFF swapping routines. */
72 #define ECOFF_32
73 #include "ecoffswap.h"
74
75 /* How to process the various relocs types. */
76
77 static reloc_howto_type mips_howto_table[] =
78 {
79 /* Reloc type 0 is ignored. The reloc reading code ensures that
80 this is a reference to the .abs section, which will cause
81 bfd_perform_relocation to do nothing. */
82 HOWTO (MIPS_R_IGNORE, /* type */
83 0, /* rightshift */
84 0, /* size (0 = byte, 1 = short, 2 = long) */
85 8, /* bitsize */
86 FALSE, /* pc_relative */
87 0, /* bitpos */
88 complain_overflow_dont, /* complain_on_overflow */
89 0, /* special_function */
90 "IGNORE", /* name */
91 FALSE, /* partial_inplace */
92 0, /* src_mask */
93 0, /* dst_mask */
94 FALSE), /* pcrel_offset */
95
96 /* A 16 bit reference to a symbol, normally from a data section. */
97 HOWTO (MIPS_R_REFHALF, /* type */
98 0, /* rightshift */
99 1, /* size (0 = byte, 1 = short, 2 = long) */
100 16, /* bitsize */
101 FALSE, /* pc_relative */
102 0, /* bitpos */
103 complain_overflow_bitfield, /* complain_on_overflow */
104 mips_generic_reloc, /* special_function */
105 "REFHALF", /* name */
106 TRUE, /* partial_inplace */
107 0xffff, /* src_mask */
108 0xffff, /* dst_mask */
109 FALSE), /* pcrel_offset */
110
111 /* A 32 bit reference to a symbol, normally from a data section. */
112 HOWTO (MIPS_R_REFWORD, /* type */
113 0, /* rightshift */
114 2, /* size (0 = byte, 1 = short, 2 = long) */
115 32, /* bitsize */
116 FALSE, /* pc_relative */
117 0, /* bitpos */
118 complain_overflow_bitfield, /* complain_on_overflow */
119 mips_generic_reloc, /* special_function */
120 "REFWORD", /* name */
121 TRUE, /* partial_inplace */
122 0xffffffff, /* src_mask */
123 0xffffffff, /* dst_mask */
124 FALSE), /* pcrel_offset */
125
126 /* A 26 bit absolute jump address. */
127 HOWTO (MIPS_R_JMPADDR, /* type */
128 2, /* rightshift */
129 2, /* size (0 = byte, 1 = short, 2 = long) */
130 26, /* bitsize */
131 FALSE, /* pc_relative */
132 0, /* bitpos */
133 complain_overflow_dont, /* complain_on_overflow */
134 /* This needs complex overflow
135 detection, because the upper four
136 bits must match the PC. */
137 mips_generic_reloc, /* special_function */
138 "JMPADDR", /* name */
139 TRUE, /* partial_inplace */
140 0x3ffffff, /* src_mask */
141 0x3ffffff, /* dst_mask */
142 FALSE), /* pcrel_offset */
143
144 /* The high 16 bits of a symbol value. Handled by the function
145 mips_refhi_reloc. */
146 HOWTO (MIPS_R_REFHI, /* type */
147 16, /* rightshift */
148 2, /* size (0 = byte, 1 = short, 2 = long) */
149 16, /* bitsize */
150 FALSE, /* pc_relative */
151 0, /* bitpos */
152 complain_overflow_bitfield, /* complain_on_overflow */
153 mips_refhi_reloc, /* special_function */
154 "REFHI", /* name */
155 TRUE, /* partial_inplace */
156 0xffff, /* src_mask */
157 0xffff, /* dst_mask */
158 FALSE), /* pcrel_offset */
159
160 /* The low 16 bits of a symbol value. */
161 HOWTO (MIPS_R_REFLO, /* type */
162 0, /* rightshift */
163 2, /* size (0 = byte, 1 = short, 2 = long) */
164 16, /* bitsize */
165 FALSE, /* pc_relative */
166 0, /* bitpos */
167 complain_overflow_dont, /* complain_on_overflow */
168 mips_reflo_reloc, /* special_function */
169 "REFLO", /* name */
170 TRUE, /* partial_inplace */
171 0xffff, /* src_mask */
172 0xffff, /* dst_mask */
173 FALSE), /* pcrel_offset */
174
175 /* A reference to an offset from the gp register. Handled by the
176 function mips_gprel_reloc. */
177 HOWTO (MIPS_R_GPREL, /* type */
178 0, /* rightshift */
179 2, /* size (0 = byte, 1 = short, 2 = long) */
180 16, /* bitsize */
181 FALSE, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_signed, /* complain_on_overflow */
184 mips_gprel_reloc, /* special_function */
185 "GPREL", /* name */
186 TRUE, /* partial_inplace */
187 0xffff, /* src_mask */
188 0xffff, /* dst_mask */
189 FALSE), /* pcrel_offset */
190
191 /* A reference to a literal using an offset from the gp register.
192 Handled by the function mips_gprel_reloc. */
193 HOWTO (MIPS_R_LITERAL, /* type */
194 0, /* rightshift */
195 2, /* size (0 = byte, 1 = short, 2 = long) */
196 16, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_signed, /* complain_on_overflow */
200 mips_gprel_reloc, /* special_function */
201 "LITERAL", /* name */
202 TRUE, /* partial_inplace */
203 0xffff, /* src_mask */
204 0xffff, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 EMPTY_HOWTO (8),
208 EMPTY_HOWTO (9),
209 EMPTY_HOWTO (10),
210 EMPTY_HOWTO (11),
211
212 /* FIXME: This relocation is used (internally only) to represent branches
213 when assembling. It should never appear in output files, and
214 be removed. (It used to be used for embedded-PIC support.) */
215 HOWTO (MIPS_R_PCREL16, /* type */
216 2, /* rightshift */
217 2, /* size (0 = byte, 1 = short, 2 = long) */
218 16, /* bitsize */
219 TRUE, /* pc_relative */
220 0, /* bitpos */
221 complain_overflow_signed, /* complain_on_overflow */
222 mips_generic_reloc, /* special_function */
223 "PCREL16", /* name */
224 TRUE, /* partial_inplace */
225 0xffff, /* src_mask */
226 0xffff, /* dst_mask */
227 TRUE), /* pcrel_offset */
228 };
229
230 #define MIPS_HOWTO_COUNT \
231 (sizeof mips_howto_table / sizeof mips_howto_table[0])
232
233 /* See whether the magic number matches. */
234
235 static bfd_boolean
mips_ecoff_bad_format_hook(bfd * abfd,void * filehdr)236 mips_ecoff_bad_format_hook (bfd * abfd, void * filehdr)
237 {
238 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
239
240 switch (internal_f->f_magic)
241 {
242 case MIPS_MAGIC_1:
243 /* I don't know what endianness this implies. */
244 return TRUE;
245
246 case MIPS_MAGIC_BIG:
247 case MIPS_MAGIC_BIG2:
248 case MIPS_MAGIC_BIG3:
249 return bfd_big_endian (abfd);
250
251 case MIPS_MAGIC_LITTLE:
252 case MIPS_MAGIC_LITTLE2:
253 case MIPS_MAGIC_LITTLE3:
254 return bfd_little_endian (abfd);
255
256 default:
257 return FALSE;
258 }
259 }
260
261 /* Reloc handling. MIPS ECOFF relocs are packed into 8 bytes in
262 external form. They use a bit which indicates whether the symbol
263 is external. */
264
265 /* Swap a reloc in. */
266
267 static void
mips_ecoff_swap_reloc_in(bfd * abfd,void * ext_ptr,struct internal_reloc * intern)268 mips_ecoff_swap_reloc_in (bfd * abfd,
269 void * ext_ptr,
270 struct internal_reloc *intern)
271 {
272 const RELOC *ext = (RELOC *) ext_ptr;
273
274 intern->r_vaddr = H_GET_32 (abfd, ext->r_vaddr);
275 if (bfd_header_big_endian (abfd))
276 {
277 intern->r_symndx = (((int) ext->r_bits[0]
278 << RELOC_BITS0_SYMNDX_SH_LEFT_BIG)
279 | ((int) ext->r_bits[1]
280 << RELOC_BITS1_SYMNDX_SH_LEFT_BIG)
281 | ((int) ext->r_bits[2]
282 << RELOC_BITS2_SYMNDX_SH_LEFT_BIG));
283 intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_BIG)
284 >> RELOC_BITS3_TYPE_SH_BIG);
285 intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_BIG) != 0;
286 }
287 else
288 {
289 intern->r_symndx = (((int) ext->r_bits[0]
290 << RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE)
291 | ((int) ext->r_bits[1]
292 << RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE)
293 | ((int) ext->r_bits[2]
294 << RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE));
295 intern->r_type = (((ext->r_bits[3] & RELOC_BITS3_TYPE_LITTLE)
296 >> RELOC_BITS3_TYPE_SH_LITTLE)
297 | ((ext->r_bits[3] & RELOC_BITS3_TYPEHI_LITTLE)
298 << RELOC_BITS3_TYPEHI_SH_LITTLE));
299 intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) != 0;
300 }
301 }
302
303 /* Swap a reloc out. */
304
305 static void
mips_ecoff_swap_reloc_out(bfd * abfd,const struct internal_reloc * intern,void * dst)306 mips_ecoff_swap_reloc_out (bfd * abfd,
307 const struct internal_reloc * intern,
308 void * dst)
309 {
310 RELOC *ext = (RELOC *) dst;
311 long r_symndx;
312
313 BFD_ASSERT (intern->r_extern
314 || (intern->r_symndx >= 0 && intern->r_symndx <= 12));
315
316 r_symndx = intern->r_symndx;
317
318 H_PUT_32 (abfd, intern->r_vaddr, ext->r_vaddr);
319 if (bfd_header_big_endian (abfd))
320 {
321 ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_BIG;
322 ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_BIG;
323 ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_BIG;
324 ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_BIG)
325 & RELOC_BITS3_TYPE_BIG)
326 | (intern->r_extern ? RELOC_BITS3_EXTERN_BIG : 0));
327 }
328 else
329 {
330 ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE;
331 ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE;
332 ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE;
333 ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_LITTLE)
334 & RELOC_BITS3_TYPE_LITTLE)
335 | ((intern->r_type >> RELOC_BITS3_TYPEHI_SH_LITTLE
336 & RELOC_BITS3_TYPEHI_LITTLE))
337 | (intern->r_extern ? RELOC_BITS3_EXTERN_LITTLE : 0));
338 }
339 }
340
341 /* Finish canonicalizing a reloc. Part of this is generic to all
342 ECOFF targets, and that part is in ecoff.c. The rest is done in
343 this backend routine. It must fill in the howto field. */
344
345 static void
mips_adjust_reloc_in(bfd * abfd,const struct internal_reloc * intern,arelent * rptr)346 mips_adjust_reloc_in (bfd *abfd,
347 const struct internal_reloc *intern,
348 arelent *rptr)
349 {
350 if (intern->r_type > MIPS_R_PCREL16)
351 abort ();
352
353 if (! intern->r_extern
354 && (intern->r_type == MIPS_R_GPREL
355 || intern->r_type == MIPS_R_LITERAL))
356 rptr->addend += ecoff_data (abfd)->gp;
357
358 /* If the type is MIPS_R_IGNORE, make sure this is a reference to
359 the absolute section so that the reloc is ignored. */
360 if (intern->r_type == MIPS_R_IGNORE)
361 rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
362
363 rptr->howto = &mips_howto_table[intern->r_type];
364 }
365
366 /* Make any adjustments needed to a reloc before writing it out. None
367 are needed for MIPS. */
368
369 static void
mips_adjust_reloc_out(bfd * abfd ATTRIBUTE_UNUSED,const arelent * rel ATTRIBUTE_UNUSED,struct internal_reloc * intern ATTRIBUTE_UNUSED)370 mips_adjust_reloc_out (bfd *abfd ATTRIBUTE_UNUSED,
371 const arelent *rel ATTRIBUTE_UNUSED,
372 struct internal_reloc *intern ATTRIBUTE_UNUSED)
373 {
374 }
375
376 /* ECOFF relocs are either against external symbols, or against
377 sections. If we are producing relocatable output, and the reloc
378 is against an external symbol, and nothing has given us any
379 additional addend, the resulting reloc will also be against the
380 same symbol. In such a case, we don't want to change anything
381 about the way the reloc is handled, since it will all be done at
382 final link time. Rather than put special case code into
383 bfd_perform_relocation, all the reloc types use this howto
384 function. It just short circuits the reloc if producing
385 relocatable output against an external symbol. */
386
387 static bfd_reloc_status_type
mips_generic_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)388 mips_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
389 arelent *reloc_entry,
390 asymbol *symbol,
391 void * data ATTRIBUTE_UNUSED,
392 asection *input_section,
393 bfd *output_bfd,
394 char **error_message ATTRIBUTE_UNUSED)
395 {
396 if (output_bfd != (bfd *) NULL
397 && (symbol->flags & BSF_SECTION_SYM) == 0
398 && reloc_entry->addend == 0)
399 {
400 reloc_entry->address += input_section->output_offset;
401 return bfd_reloc_ok;
402 }
403
404 return bfd_reloc_continue;
405 }
406
407 /* Do a REFHI relocation. This has to be done in combination with a
408 REFLO reloc, because there is a carry from the REFLO to the REFHI.
409 Here we just save the information we need; we do the actual
410 relocation when we see the REFLO. MIPS ECOFF requires that the
411 REFLO immediately follow the REFHI. As a GNU extension, we permit
412 an arbitrary number of HI relocs to be associated with a single LO
413 reloc. This extension permits gcc to output the HI and LO relocs
414 itself. */
415
416 struct mips_hi
417 {
418 struct mips_hi *next;
419 bfd_byte *addr;
420 bfd_vma addend;
421 };
422
423 /* FIXME: This should not be a static variable. */
424
425 static struct mips_hi *mips_refhi_list;
426
427 static bfd_reloc_status_type
mips_refhi_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)428 mips_refhi_reloc (bfd *abfd ATTRIBUTE_UNUSED,
429 arelent *reloc_entry,
430 asymbol *symbol,
431 void * data,
432 asection *input_section,
433 bfd *output_bfd,
434 char **error_message ATTRIBUTE_UNUSED)
435 {
436 bfd_reloc_status_type ret;
437 bfd_vma relocation;
438 struct mips_hi *n;
439
440 /* If we're relocating, and this an external symbol, we don't want
441 to change anything. */
442 if (output_bfd != (bfd *) NULL
443 && (symbol->flags & BSF_SECTION_SYM) == 0
444 && reloc_entry->addend == 0)
445 {
446 reloc_entry->address += input_section->output_offset;
447 return bfd_reloc_ok;
448 }
449
450 ret = bfd_reloc_ok;
451 if (bfd_is_und_section (symbol->section)
452 && output_bfd == (bfd *) NULL)
453 ret = bfd_reloc_undefined;
454
455 if (bfd_is_com_section (symbol->section))
456 relocation = 0;
457 else
458 relocation = symbol->value;
459
460 relocation += symbol->section->output_section->vma;
461 relocation += symbol->section->output_offset;
462 relocation += reloc_entry->addend;
463
464 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
465 return bfd_reloc_outofrange;
466
467 /* Save the information, and let REFLO do the actual relocation. */
468 n = (struct mips_hi *) bfd_malloc ((bfd_size_type) sizeof *n);
469 if (n == NULL)
470 return bfd_reloc_outofrange;
471 n->addr = (bfd_byte *) data + reloc_entry->address;
472 n->addend = relocation;
473 n->next = mips_refhi_list;
474 mips_refhi_list = n;
475
476 if (output_bfd != (bfd *) NULL)
477 reloc_entry->address += input_section->output_offset;
478
479 return ret;
480 }
481
482 /* Do a REFLO relocation. This is a straightforward 16 bit inplace
483 relocation; this function exists in order to do the REFHI
484 relocation described above. */
485
486 static bfd_reloc_status_type
mips_reflo_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)487 mips_reflo_reloc (bfd *abfd ATTRIBUTE_UNUSED,
488 arelent *reloc_entry,
489 asymbol *symbol,
490 void * data,
491 asection *input_section,
492 bfd *output_bfd,
493 char **error_message ATTRIBUTE_UNUSED)
494 {
495 if (mips_refhi_list != NULL)
496 {
497 struct mips_hi *l;
498
499 l = mips_refhi_list;
500 while (l != NULL)
501 {
502 unsigned long insn;
503 unsigned long val;
504 unsigned long vallo;
505 struct mips_hi *next;
506
507 if (! bfd_reloc_offset_in_range (reloc_entry->howto, abfd,
508 input_section,
509 reloc_entry->address
510 * bfd_octets_per_byte (abfd)))
511 return bfd_reloc_outofrange;
512
513 /* Do the REFHI relocation. Note that we actually don't
514 need to know anything about the REFLO itself, except
515 where to find the low 16 bits of the addend needed by the
516 REFHI. */
517 insn = bfd_get_32 (abfd, l->addr);
518 vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
519 & 0xffff);
520 val = ((insn & 0xffff) << 16) + vallo;
521 val += l->addend;
522
523 /* The low order 16 bits are always treated as a signed
524 value. Therefore, a negative value in the low order bits
525 requires an adjustment in the high order bits. We need
526 to make this adjustment in two ways: once for the bits we
527 took from the data, and once for the bits we are putting
528 back in to the data. */
529 if ((vallo & 0x8000) != 0)
530 val -= 0x10000;
531 if ((val & 0x8000) != 0)
532 val += 0x10000;
533
534 insn = (insn &~ (unsigned) 0xffff) | ((val >> 16) & 0xffff);
535 bfd_put_32 (abfd, (bfd_vma) insn, l->addr);
536
537 next = l->next;
538 free (l);
539 l = next;
540 }
541
542 mips_refhi_list = NULL;
543 }
544
545 /* Now do the REFLO reloc in the usual way. */
546 return mips_generic_reloc (abfd, reloc_entry, symbol, data,
547 input_section, output_bfd, error_message);
548 }
549
550 /* Do a GPREL relocation. This is a 16 bit value which must become
551 the offset from the gp register. */
552
553 static bfd_reloc_status_type
mips_gprel_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)554 mips_gprel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
555 arelent *reloc_entry,
556 asymbol *symbol,
557 void * data,
558 asection *input_section,
559 bfd *output_bfd,
560 char **error_message ATTRIBUTE_UNUSED)
561 {
562 bfd_boolean relocatable;
563 bfd_vma gp;
564 bfd_vma relocation;
565 unsigned long val;
566 unsigned long insn;
567
568 /* If we're relocating, and this is an external symbol with no
569 addend, we don't want to change anything. We will only have an
570 addend if this is a newly created reloc, not read from an ECOFF
571 file. */
572 if (output_bfd != (bfd *) NULL
573 && (symbol->flags & BSF_SECTION_SYM) == 0
574 && reloc_entry->addend == 0)
575 {
576 reloc_entry->address += input_section->output_offset;
577 return bfd_reloc_ok;
578 }
579
580 if (output_bfd != (bfd *) NULL)
581 relocatable = TRUE;
582 else
583 {
584 relocatable = FALSE;
585 output_bfd = symbol->section->output_section->owner;
586 }
587
588 if (bfd_is_und_section (symbol->section) && ! relocatable)
589 return bfd_reloc_undefined;
590
591 /* We have to figure out the gp value, so that we can adjust the
592 symbol value correctly. We look up the symbol _gp in the output
593 BFD. If we can't find it, we're stuck. We cache it in the ECOFF
594 target data. We don't need to adjust the symbol value for an
595 external symbol if we are producing relocatable output. */
596 gp = _bfd_get_gp_value (output_bfd);
597 if (gp == 0
598 && (! relocatable
599 || (symbol->flags & BSF_SECTION_SYM) != 0))
600 {
601 if (relocatable)
602 {
603 /* Make up a value. */
604 gp = symbol->section->output_section->vma + 0x4000;
605 _bfd_set_gp_value (output_bfd, gp);
606 }
607 else
608 {
609 unsigned int count;
610 asymbol **sym;
611 unsigned int i;
612
613 count = bfd_get_symcount (output_bfd);
614 sym = bfd_get_outsymbols (output_bfd);
615
616 if (sym == (asymbol **) NULL)
617 i = count;
618 else
619 {
620 for (i = 0; i < count; i++, sym++)
621 {
622 register const char *name;
623
624 name = bfd_asymbol_name (*sym);
625 if (*name == '_' && strcmp (name, "_gp") == 0)
626 {
627 gp = bfd_asymbol_value (*sym);
628 _bfd_set_gp_value (output_bfd, gp);
629 break;
630 }
631 }
632 }
633
634 if (i >= count)
635 {
636 /* Only get the error once. */
637 gp = 4;
638 _bfd_set_gp_value (output_bfd, gp);
639 *error_message =
640 (char *) _("GP relative relocation when _gp not defined");
641 return bfd_reloc_dangerous;
642 }
643 }
644 }
645
646 if (bfd_is_com_section (symbol->section))
647 relocation = 0;
648 else
649 relocation = symbol->value;
650
651 relocation += symbol->section->output_section->vma;
652 relocation += symbol->section->output_offset;
653
654 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
655 return bfd_reloc_outofrange;
656
657 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
658
659 /* Set val to the offset into the section or symbol. */
660 val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
661 if (val & 0x8000)
662 val -= 0x10000;
663
664 /* Adjust val for the final section location and GP value. If we
665 are producing relocatable output, we don't want to do this for
666 an external symbol. */
667 if (! relocatable
668 || (symbol->flags & BSF_SECTION_SYM) != 0)
669 val += relocation - gp;
670
671 insn = (insn &~ (unsigned) 0xffff) | (val & 0xffff);
672 bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + reloc_entry->address);
673
674 if (relocatable)
675 reloc_entry->address += input_section->output_offset;
676
677 /* Make sure it fit in 16 bits. */
678 if ((long) val >= 0x8000 || (long) val < -0x8000)
679 return bfd_reloc_overflow;
680
681 return bfd_reloc_ok;
682 }
683
684 /* Get the howto structure for a generic reloc type. */
685
686 static reloc_howto_type *
mips_bfd_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)687 mips_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
688 bfd_reloc_code_real_type code)
689 {
690 int mips_type;
691
692 switch (code)
693 {
694 case BFD_RELOC_16:
695 mips_type = MIPS_R_REFHALF;
696 break;
697 case BFD_RELOC_32:
698 case BFD_RELOC_CTOR:
699 mips_type = MIPS_R_REFWORD;
700 break;
701 case BFD_RELOC_MIPS_JMP:
702 mips_type = MIPS_R_JMPADDR;
703 break;
704 case BFD_RELOC_HI16_S:
705 mips_type = MIPS_R_REFHI;
706 break;
707 case BFD_RELOC_LO16:
708 mips_type = MIPS_R_REFLO;
709 break;
710 case BFD_RELOC_GPREL16:
711 mips_type = MIPS_R_GPREL;
712 break;
713 case BFD_RELOC_MIPS_LITERAL:
714 mips_type = MIPS_R_LITERAL;
715 break;
716 case BFD_RELOC_16_PCREL_S2:
717 mips_type = MIPS_R_PCREL16;
718 break;
719 default:
720 return (reloc_howto_type *) NULL;
721 }
722
723 return &mips_howto_table[mips_type];
724 }
725
726 static reloc_howto_type *
mips_bfd_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)727 mips_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
728 const char *r_name)
729 {
730 unsigned int i;
731
732 for (i = 0;
733 i < sizeof (mips_howto_table) / sizeof (mips_howto_table[0]);
734 i++)
735 if (mips_howto_table[i].name != NULL
736 && strcasecmp (mips_howto_table[i].name, r_name) == 0)
737 return &mips_howto_table[i];
738
739 return NULL;
740 }
741
742 /* A helper routine for mips_relocate_section which handles the REFHI
743 relocations. The REFHI relocation must be followed by a REFLO
744 relocation, and the addend used is formed from the addends of both
745 instructions. */
746
747 static void
mips_relocate_hi(struct internal_reloc * refhi,struct internal_reloc * reflo,bfd * input_bfd,asection * input_section,bfd_byte * contents,bfd_vma relocation)748 mips_relocate_hi (struct internal_reloc *refhi,
749 struct internal_reloc *reflo,
750 bfd *input_bfd,
751 asection *input_section,
752 bfd_byte *contents,
753 bfd_vma relocation)
754 {
755 unsigned long insn;
756 unsigned long val;
757 unsigned long vallo;
758
759 if (refhi == NULL)
760 return;
761
762 insn = bfd_get_32 (input_bfd,
763 contents + refhi->r_vaddr - input_section->vma);
764 if (reflo == NULL)
765 vallo = 0;
766 else
767 vallo = (bfd_get_32 (input_bfd,
768 contents + reflo->r_vaddr - input_section->vma)
769 & 0xffff);
770
771 val = ((insn & 0xffff) << 16) + vallo;
772 val += relocation;
773
774 /* The low order 16 bits are always treated as a signed value.
775 Therefore, a negative value in the low order bits requires an
776 adjustment in the high order bits. We need to make this
777 adjustment in two ways: once for the bits we took from the data,
778 and once for the bits we are putting back in to the data. */
779 if ((vallo & 0x8000) != 0)
780 val -= 0x10000;
781
782 if ((val & 0x8000) != 0)
783 val += 0x10000;
784
785 insn = (insn &~ (unsigned) 0xffff) | ((val >> 16) & 0xffff);
786 bfd_put_32 (input_bfd, (bfd_vma) insn,
787 contents + refhi->r_vaddr - input_section->vma);
788 }
789
790 /* Relocate a section while linking a MIPS ECOFF file. */
791
792 static bfd_boolean
mips_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,void * external_relocs)793 mips_relocate_section (bfd *output_bfd,
794 struct bfd_link_info *info,
795 bfd *input_bfd,
796 asection *input_section,
797 bfd_byte *contents,
798 void * external_relocs)
799 {
800 asection **symndx_to_section;
801 struct ecoff_link_hash_entry **sym_hashes;
802 bfd_vma gp;
803 bfd_boolean gp_undefined;
804 struct external_reloc *ext_rel;
805 struct external_reloc *ext_rel_end;
806 unsigned int i;
807 bfd_boolean got_lo;
808 struct internal_reloc lo_int_rel;
809 bfd_size_type amt;
810
811 BFD_ASSERT (input_bfd->xvec->byteorder
812 == output_bfd->xvec->byteorder);
813
814 /* We keep a table mapping the symndx found in an internal reloc to
815 the appropriate section. This is faster than looking up the
816 section by name each time. */
817 symndx_to_section = ecoff_data (input_bfd)->symndx_to_section;
818 if (symndx_to_section == (asection **) NULL)
819 {
820 amt = NUM_RELOC_SECTIONS * sizeof (asection *);
821 symndx_to_section = (asection **) bfd_alloc (input_bfd, amt);
822 if (!symndx_to_section)
823 return FALSE;
824
825 symndx_to_section[RELOC_SECTION_NONE] = NULL;
826 symndx_to_section[RELOC_SECTION_TEXT] =
827 bfd_get_section_by_name (input_bfd, ".text");
828 symndx_to_section[RELOC_SECTION_RDATA] =
829 bfd_get_section_by_name (input_bfd, ".rdata");
830 symndx_to_section[RELOC_SECTION_DATA] =
831 bfd_get_section_by_name (input_bfd, ".data");
832 symndx_to_section[RELOC_SECTION_SDATA] =
833 bfd_get_section_by_name (input_bfd, ".sdata");
834 symndx_to_section[RELOC_SECTION_SBSS] =
835 bfd_get_section_by_name (input_bfd, ".sbss");
836 symndx_to_section[RELOC_SECTION_BSS] =
837 bfd_get_section_by_name (input_bfd, ".bss");
838 symndx_to_section[RELOC_SECTION_INIT] =
839 bfd_get_section_by_name (input_bfd, ".init");
840 symndx_to_section[RELOC_SECTION_LIT8] =
841 bfd_get_section_by_name (input_bfd, ".lit8");
842 symndx_to_section[RELOC_SECTION_LIT4] =
843 bfd_get_section_by_name (input_bfd, ".lit4");
844 symndx_to_section[RELOC_SECTION_XDATA] = NULL;
845 symndx_to_section[RELOC_SECTION_PDATA] = NULL;
846 symndx_to_section[RELOC_SECTION_FINI] =
847 bfd_get_section_by_name (input_bfd, ".fini");
848 symndx_to_section[RELOC_SECTION_LITA] = NULL;
849 symndx_to_section[RELOC_SECTION_ABS] = NULL;
850
851 ecoff_data (input_bfd)->symndx_to_section = symndx_to_section;
852 }
853
854 sym_hashes = ecoff_data (input_bfd)->sym_hashes;
855
856 gp = _bfd_get_gp_value (output_bfd);
857 if (gp == 0)
858 gp_undefined = TRUE;
859 else
860 gp_undefined = FALSE;
861
862 got_lo = FALSE;
863
864 ext_rel = (struct external_reloc *) external_relocs;
865 ext_rel_end = ext_rel + input_section->reloc_count;
866 for (i = 0; ext_rel < ext_rel_end; ext_rel++, i++)
867 {
868 struct internal_reloc int_rel;
869 bfd_boolean use_lo = FALSE;
870 bfd_vma addend;
871 reloc_howto_type *howto;
872 struct ecoff_link_hash_entry *h = NULL;
873 asection *s = NULL;
874 bfd_vma relocation;
875 bfd_reloc_status_type r;
876
877 if (! got_lo)
878 mips_ecoff_swap_reloc_in (input_bfd, ext_rel, &int_rel);
879 else
880 {
881 int_rel = lo_int_rel;
882 got_lo = FALSE;
883 }
884
885 BFD_ASSERT (int_rel.r_type
886 < sizeof mips_howto_table / sizeof mips_howto_table[0]);
887
888 /* The REFHI reloc requires special handling. It must be followed
889 by a REFLO reloc, and the addend is formed from both relocs. */
890 if (int_rel.r_type == MIPS_R_REFHI)
891 {
892 struct external_reloc *lo_ext_rel;
893
894 /* As a GNU extension, permit an arbitrary number of REFHI
895 relocs before the REFLO reloc. This permits gcc to emit
896 the HI and LO relocs itself. */
897 for (lo_ext_rel = ext_rel + 1;
898 lo_ext_rel < ext_rel_end;
899 lo_ext_rel++)
900 {
901 mips_ecoff_swap_reloc_in (input_bfd, lo_ext_rel,
902 &lo_int_rel);
903 if (lo_int_rel.r_type != int_rel.r_type)
904 break;
905 }
906
907 if (lo_ext_rel < ext_rel_end
908 && lo_int_rel.r_type == MIPS_R_REFLO
909 && int_rel.r_extern == lo_int_rel.r_extern
910 && int_rel.r_symndx == lo_int_rel.r_symndx)
911 {
912 use_lo = TRUE;
913 if (lo_ext_rel == ext_rel + 1)
914 got_lo = TRUE;
915 }
916 }
917
918 howto = &mips_howto_table[int_rel.r_type];
919
920 if (int_rel.r_extern)
921 {
922 h = sym_hashes[int_rel.r_symndx];
923 /* If h is NULL, that means that there is a reloc against an
924 external symbol which we thought was just a debugging
925 symbol. This should not happen. */
926 if (h == (struct ecoff_link_hash_entry *) NULL)
927 abort ();
928 }
929 else
930 {
931 if (int_rel.r_symndx < 0 || int_rel.r_symndx >= NUM_RELOC_SECTIONS)
932 s = NULL;
933 else
934 s = symndx_to_section[int_rel.r_symndx];
935
936 if (s == (asection *) NULL)
937 abort ();
938 }
939
940 /* The GPREL reloc uses an addend: the difference in the GP
941 values. */
942 if (int_rel.r_type != MIPS_R_GPREL
943 && int_rel.r_type != MIPS_R_LITERAL)
944 addend = 0;
945 else
946 {
947 if (gp_undefined)
948 {
949 (*info->callbacks->reloc_dangerous)
950 (info, _("GP relative relocation used when GP not defined"),
951 input_bfd, input_section,
952 int_rel.r_vaddr - input_section->vma);
953 /* Only give the error once per link. */
954 gp = 4;
955 _bfd_set_gp_value (output_bfd, gp);
956 gp_undefined = FALSE;
957 }
958 if (! int_rel.r_extern)
959 {
960 /* This is a relocation against a section. The current
961 addend in the instruction is the difference between
962 INPUT_SECTION->vma and the GP value of INPUT_BFD. We
963 must change this to be the difference between the
964 final definition (which will end up in RELOCATION)
965 and the GP value of OUTPUT_BFD (which is in GP). */
966 addend = ecoff_data (input_bfd)->gp - gp;
967 }
968 else if (! bfd_link_relocatable (info)
969 || h->root.type == bfd_link_hash_defined
970 || h->root.type == bfd_link_hash_defweak)
971 {
972 /* This is a relocation against a defined symbol. The
973 current addend in the instruction is simply the
974 desired offset into the symbol (normally zero). We
975 are going to change this into a relocation against a
976 defined symbol, so we want the instruction to hold
977 the difference between the final definition of the
978 symbol (which will end up in RELOCATION) and the GP
979 value of OUTPUT_BFD (which is in GP). */
980 addend = - gp;
981 }
982 else
983 {
984 /* This is a relocation against an undefined or common
985 symbol. The current addend in the instruction is
986 simply the desired offset into the symbol (normally
987 zero). We are generating relocatable output, and we
988 aren't going to define this symbol, so we just leave
989 the instruction alone. */
990 addend = 0;
991 }
992 }
993
994 if (bfd_link_relocatable (info))
995 {
996 /* We are generating relocatable output, and must convert
997 the existing reloc. */
998 if (int_rel.r_extern)
999 {
1000 if ((h->root.type == bfd_link_hash_defined
1001 || h->root.type == bfd_link_hash_defweak)
1002 && ! bfd_is_abs_section (h->root.u.def.section))
1003 {
1004 const char *name;
1005
1006 /* This symbol is defined in the output. Convert
1007 the reloc from being against the symbol to being
1008 against the section. */
1009
1010 /* Clear the r_extern bit. */
1011 int_rel.r_extern = 0;
1012
1013 /* Compute a new r_symndx value. */
1014 s = h->root.u.def.section;
1015 name = bfd_get_section_name (output_bfd,
1016 s->output_section);
1017
1018 int_rel.r_symndx = -1;
1019 switch (name[1])
1020 {
1021 case 'b':
1022 if (strcmp (name, ".bss") == 0)
1023 int_rel.r_symndx = RELOC_SECTION_BSS;
1024 break;
1025 case 'd':
1026 if (strcmp (name, ".data") == 0)
1027 int_rel.r_symndx = RELOC_SECTION_DATA;
1028 break;
1029 case 'f':
1030 if (strcmp (name, ".fini") == 0)
1031 int_rel.r_symndx = RELOC_SECTION_FINI;
1032 break;
1033 case 'i':
1034 if (strcmp (name, ".init") == 0)
1035 int_rel.r_symndx = RELOC_SECTION_INIT;
1036 break;
1037 case 'l':
1038 if (strcmp (name, ".lit8") == 0)
1039 int_rel.r_symndx = RELOC_SECTION_LIT8;
1040 else if (strcmp (name, ".lit4") == 0)
1041 int_rel.r_symndx = RELOC_SECTION_LIT4;
1042 break;
1043 case 'r':
1044 if (strcmp (name, ".rdata") == 0)
1045 int_rel.r_symndx = RELOC_SECTION_RDATA;
1046 break;
1047 case 's':
1048 if (strcmp (name, ".sdata") == 0)
1049 int_rel.r_symndx = RELOC_SECTION_SDATA;
1050 else if (strcmp (name, ".sbss") == 0)
1051 int_rel.r_symndx = RELOC_SECTION_SBSS;
1052 break;
1053 case 't':
1054 if (strcmp (name, ".text") == 0)
1055 int_rel.r_symndx = RELOC_SECTION_TEXT;
1056 break;
1057 }
1058
1059 if (int_rel.r_symndx == -1)
1060 abort ();
1061
1062 /* Add the section VMA and the symbol value. */
1063 relocation = (h->root.u.def.value
1064 + s->output_section->vma
1065 + s->output_offset);
1066
1067 /* For a PC relative relocation, the object file
1068 currently holds just the addend. We must adjust
1069 by the address to get the right value. */
1070 if (howto->pc_relative)
1071 relocation -= int_rel.r_vaddr - input_section->vma;
1072
1073 h = NULL;
1074 }
1075 else
1076 {
1077 /* Change the symndx value to the right one for the
1078 output BFD. */
1079 int_rel.r_symndx = h->indx;
1080 if (int_rel.r_symndx == -1)
1081 {
1082 /* This symbol is not being written out. */
1083 (*info->callbacks->unattached_reloc)
1084 (info, h->root.root.string, input_bfd, input_section,
1085 int_rel.r_vaddr - input_section->vma);
1086 int_rel.r_symndx = 0;
1087 }
1088 relocation = 0;
1089 }
1090 }
1091 else
1092 {
1093 /* This is a relocation against a section. Adjust the
1094 value by the amount the section moved. */
1095 relocation = (s->output_section->vma
1096 + s->output_offset
1097 - s->vma);
1098 }
1099
1100 relocation += addend;
1101 addend = 0;
1102
1103 /* Adjust a PC relative relocation by removing the reference
1104 to the original address in the section and including the
1105 reference to the new address. */
1106 if (howto->pc_relative)
1107 relocation -= (input_section->output_section->vma
1108 + input_section->output_offset
1109 - input_section->vma);
1110
1111 /* Adjust the contents. */
1112 if (relocation == 0)
1113 r = bfd_reloc_ok;
1114 else
1115 {
1116 if (int_rel.r_type != MIPS_R_REFHI)
1117 r = _bfd_relocate_contents (howto, input_bfd, relocation,
1118 (contents
1119 + int_rel.r_vaddr
1120 - input_section->vma));
1121 else
1122 {
1123 mips_relocate_hi (&int_rel,
1124 use_lo ? &lo_int_rel : NULL,
1125 input_bfd, input_section, contents,
1126 relocation);
1127 r = bfd_reloc_ok;
1128 }
1129 }
1130
1131 /* Adjust the reloc address. */
1132 int_rel.r_vaddr += (input_section->output_section->vma
1133 + input_section->output_offset
1134 - input_section->vma);
1135
1136 /* Save the changed reloc information. */
1137 mips_ecoff_swap_reloc_out (input_bfd, &int_rel, ext_rel);
1138 }
1139 else
1140 {
1141 /* We are producing a final executable. */
1142 if (int_rel.r_extern)
1143 {
1144 /* This is a reloc against a symbol. */
1145 if (h->root.type == bfd_link_hash_defined
1146 || h->root.type == bfd_link_hash_defweak)
1147 {
1148 asection *hsec;
1149
1150 hsec = h->root.u.def.section;
1151 relocation = (h->root.u.def.value
1152 + hsec->output_section->vma
1153 + hsec->output_offset);
1154 }
1155 else
1156 {
1157 (*info->callbacks->undefined_symbol)
1158 (info, h->root.root.string, input_bfd, input_section,
1159 int_rel.r_vaddr - input_section->vma, TRUE);
1160 relocation = 0;
1161 }
1162 }
1163 else
1164 {
1165 /* This is a reloc against a section. */
1166 relocation = (s->output_section->vma
1167 + s->output_offset
1168 - s->vma);
1169
1170 /* A PC relative reloc is already correct in the object
1171 file. Make it look like a pcrel_offset relocation by
1172 adding in the start address. */
1173 if (howto->pc_relative)
1174 relocation += int_rel.r_vaddr;
1175 }
1176
1177 if (int_rel.r_type != MIPS_R_REFHI)
1178 r = _bfd_final_link_relocate (howto,
1179 input_bfd,
1180 input_section,
1181 contents,
1182 (int_rel.r_vaddr
1183 - input_section->vma),
1184 relocation,
1185 addend);
1186 else
1187 {
1188 mips_relocate_hi (&int_rel,
1189 use_lo ? &lo_int_rel : NULL,
1190 input_bfd, input_section, contents,
1191 relocation);
1192 r = bfd_reloc_ok;
1193 }
1194 }
1195
1196 /* MIPS_R_JMPADDR requires peculiar overflow detection. The
1197 instruction provides a 28 bit address (the two lower bits are
1198 implicit zeroes) which is combined with the upper four bits
1199 of the instruction address. */
1200 if (r == bfd_reloc_ok
1201 && int_rel.r_type == MIPS_R_JMPADDR
1202 && (((relocation
1203 + addend
1204 + (int_rel.r_extern ? 0 : s->vma))
1205 & 0xf0000000)
1206 != ((input_section->output_section->vma
1207 + input_section->output_offset
1208 + (int_rel.r_vaddr - input_section->vma))
1209 & 0xf0000000)))
1210 r = bfd_reloc_overflow;
1211
1212 if (r != bfd_reloc_ok)
1213 {
1214 switch (r)
1215 {
1216 default:
1217 case bfd_reloc_outofrange:
1218 abort ();
1219 case bfd_reloc_overflow:
1220 {
1221 const char *name;
1222
1223 if (int_rel.r_extern)
1224 name = NULL;
1225 else
1226 name = bfd_section_name (input_bfd, s);
1227 (*info->callbacks->reloc_overflow)
1228 (info, (h ? &h->root : NULL), name, howto->name,
1229 (bfd_vma) 0, input_bfd, input_section,
1230 int_rel.r_vaddr - input_section->vma);
1231 }
1232 break;
1233 }
1234 }
1235 }
1236
1237 return TRUE;
1238 }
1239
1240 /* This is the ECOFF backend structure. The backend field of the
1241 target vector points to this. */
1242
1243 static const struct ecoff_backend_data mips_ecoff_backend_data =
1244 {
1245 /* COFF backend structure. */
1246 {
1247 (void (*) (bfd *,void *,int,int,int,int,void *)) bfd_void, /* aux_in */
1248 (void (*) (bfd *,void *,void *)) bfd_void, /* sym_in */
1249 (void (*) (bfd *,void *,void *)) bfd_void, /* lineno_in */
1250 (unsigned (*) (bfd *,void *,int,int,int,int,void *)) bfd_void,/*aux_out*/
1251 (unsigned (*) (bfd *,void *,void *)) bfd_void, /* sym_out */
1252 (unsigned (*) (bfd *,void *,void *)) bfd_void, /* lineno_out */
1253 (unsigned (*) (bfd *,void *,void *)) bfd_void, /* reloc_out */
1254 mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out,
1255 mips_ecoff_swap_scnhdr_out,
1256 FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE,
1257 ECOFF_NO_LONG_SECTION_NAMES, 4, FALSE, 2, 32768,
1258 mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in,
1259 mips_ecoff_swap_scnhdr_in, NULL,
1260 mips_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook,
1261 _bfd_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags,
1262 _bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table,
1263 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1264 NULL, NULL, NULL
1265 },
1266 /* Supported architecture. */
1267 bfd_arch_mips,
1268 /* Initial portion of armap string. */
1269 "__________",
1270 /* The page boundary used to align sections in a demand-paged
1271 executable file. E.g., 0x1000. */
1272 0x1000,
1273 /* TRUE if the .rdata section is part of the text segment, as on the
1274 Alpha. FALSE if .rdata is part of the data segment, as on the
1275 MIPS. */
1276 FALSE,
1277 /* Bitsize of constructor entries. */
1278 32,
1279 /* Reloc to use for constructor entries. */
1280 &mips_howto_table[MIPS_R_REFWORD],
1281 {
1282 /* Symbol table magic number. */
1283 magicSym,
1284 /* Alignment of debugging information. E.g., 4. */
1285 4,
1286 /* Sizes of external symbolic information. */
1287 sizeof (struct hdr_ext),
1288 sizeof (struct dnr_ext),
1289 sizeof (struct pdr_ext),
1290 sizeof (struct sym_ext),
1291 sizeof (struct opt_ext),
1292 sizeof (struct fdr_ext),
1293 sizeof (struct rfd_ext),
1294 sizeof (struct ext_ext),
1295 /* Functions to swap in external symbolic data. */
1296 ecoff_swap_hdr_in,
1297 ecoff_swap_dnr_in,
1298 ecoff_swap_pdr_in,
1299 ecoff_swap_sym_in,
1300 ecoff_swap_opt_in,
1301 ecoff_swap_fdr_in,
1302 ecoff_swap_rfd_in,
1303 ecoff_swap_ext_in,
1304 _bfd_ecoff_swap_tir_in,
1305 _bfd_ecoff_swap_rndx_in,
1306 /* Functions to swap out external symbolic data. */
1307 ecoff_swap_hdr_out,
1308 ecoff_swap_dnr_out,
1309 ecoff_swap_pdr_out,
1310 ecoff_swap_sym_out,
1311 ecoff_swap_opt_out,
1312 ecoff_swap_fdr_out,
1313 ecoff_swap_rfd_out,
1314 ecoff_swap_ext_out,
1315 _bfd_ecoff_swap_tir_out,
1316 _bfd_ecoff_swap_rndx_out,
1317 /* Function to read in symbolic data. */
1318 _bfd_ecoff_slurp_symbolic_info
1319 },
1320 /* External reloc size. */
1321 RELSZ,
1322 /* Reloc swapping functions. */
1323 mips_ecoff_swap_reloc_in,
1324 mips_ecoff_swap_reloc_out,
1325 /* Backend reloc tweaking. */
1326 mips_adjust_reloc_in,
1327 mips_adjust_reloc_out,
1328 /* Relocate section contents while linking. */
1329 mips_relocate_section,
1330 /* Do final adjustments to filehdr and aouthdr. */
1331 NULL,
1332 /* Read an element from an archive at a given file position. */
1333 _bfd_get_elt_at_filepos
1334 };
1335
1336 /* Looking up a reloc type is MIPS specific. */
1337 #define _bfd_ecoff_bfd_reloc_type_lookup mips_bfd_reloc_type_lookup
1338 #define _bfd_ecoff_bfd_reloc_name_lookup mips_bfd_reloc_name_lookup
1339
1340 /* Getting relocated section contents is generic. */
1341 #define _bfd_ecoff_bfd_get_relocated_section_contents \
1342 bfd_generic_get_relocated_section_contents
1343
1344 /* Handling file windows is generic. */
1345 #define _bfd_ecoff_get_section_contents_in_window \
1346 _bfd_generic_get_section_contents_in_window
1347
1348 /* Relaxing sections is MIPS specific. */
1349 #define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section
1350
1351 /* GC of sections is not done. */
1352 #define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections
1353
1354 /* Input section flags is not implemented. */
1355 #define _bfd_ecoff_bfd_lookup_section_flags bfd_generic_lookup_section_flags
1356
1357 /* Merging of sections is not done. */
1358 #define _bfd_ecoff_bfd_merge_sections bfd_generic_merge_sections
1359
1360 #define _bfd_ecoff_bfd_is_group_section bfd_generic_is_group_section
1361 #define _bfd_ecoff_bfd_discard_group bfd_generic_discard_group
1362 #define _bfd_ecoff_section_already_linked \
1363 _bfd_coff_section_already_linked
1364 #define _bfd_ecoff_bfd_define_common_symbol bfd_generic_define_common_symbol
1365 #define _bfd_ecoff_bfd_define_start_stop bfd_generic_define_start_stop
1366 #define _bfd_ecoff_set_reloc _bfd_generic_set_reloc
1367
1368 extern const bfd_target mips_ecoff_be_vec;
1369
1370 const bfd_target mips_ecoff_le_vec =
1371 {
1372 "ecoff-littlemips", /* name */
1373 bfd_target_ecoff_flavour,
1374 BFD_ENDIAN_LITTLE, /* data byte order is little */
1375 BFD_ENDIAN_LITTLE, /* header byte order is little */
1376
1377 (HAS_RELOC | EXEC_P | /* object flags */
1378 HAS_LINENO | HAS_DEBUG |
1379 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
1380
1381 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
1382 0, /* leading underscore */
1383 ' ', /* ar_pad_char */
1384 15, /* ar_max_namelen */
1385 0, /* match priority. */
1386 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1387 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1388 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1389 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1390 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1391 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
1392
1393 {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
1394 bfd_generic_archive_p, _bfd_dummy_target},
1395 {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */
1396 _bfd_generic_mkarchive, bfd_false},
1397 {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */
1398 _bfd_write_archive_contents, bfd_false},
1399
1400 BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
1401 BFD_JUMP_TABLE_COPY (_bfd_ecoff),
1402 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1403 BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
1404 BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
1405 BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
1406 BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
1407 BFD_JUMP_TABLE_LINK (_bfd_ecoff),
1408 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1409
1410 & mips_ecoff_be_vec,
1411
1412 & mips_ecoff_backend_data
1413 };
1414
1415 const bfd_target mips_ecoff_be_vec =
1416 {
1417 "ecoff-bigmips", /* name */
1418 bfd_target_ecoff_flavour,
1419 BFD_ENDIAN_BIG, /* data byte order is big */
1420 BFD_ENDIAN_BIG, /* header byte order is big */
1421
1422 (HAS_RELOC | EXEC_P | /* object flags */
1423 HAS_LINENO | HAS_DEBUG |
1424 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
1425
1426 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
1427 0, /* leading underscore */
1428 ' ', /* ar_pad_char */
1429 15, /* ar_max_namelen */
1430 0, /* match priority. */
1431 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1432 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1433 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
1434 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1435 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1436 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
1437 {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
1438 bfd_generic_archive_p, _bfd_dummy_target},
1439 {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */
1440 _bfd_generic_mkarchive, bfd_false},
1441 {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */
1442 _bfd_write_archive_contents, bfd_false},
1443
1444 BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
1445 BFD_JUMP_TABLE_COPY (_bfd_ecoff),
1446 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1447 BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
1448 BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
1449 BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
1450 BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
1451 BFD_JUMP_TABLE_LINK (_bfd_ecoff),
1452 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1453
1454 & mips_ecoff_le_vec,
1455
1456 & mips_ecoff_backend_data
1457 };
1458
1459 const bfd_target mips_ecoff_bele_vec =
1460 {
1461 "ecoff-biglittlemips", /* name */
1462 bfd_target_ecoff_flavour,
1463 BFD_ENDIAN_LITTLE, /* data byte order is little */
1464 BFD_ENDIAN_BIG, /* header byte order is big */
1465
1466 (HAS_RELOC | EXEC_P | /* object flags */
1467 HAS_LINENO | HAS_DEBUG |
1468 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
1469
1470 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
1471 0, /* leading underscore */
1472 ' ', /* ar_pad_char */
1473 15, /* ar_max_namelen */
1474 0, /* match priority. */
1475 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1476 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1477 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1478 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1479 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1480 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
1481
1482 {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
1483 bfd_generic_archive_p, _bfd_dummy_target},
1484 {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */
1485 _bfd_generic_mkarchive, bfd_false},
1486 {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */
1487 _bfd_write_archive_contents, bfd_false},
1488
1489 BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
1490 BFD_JUMP_TABLE_COPY (_bfd_ecoff),
1491 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1492 BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
1493 BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
1494 BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
1495 BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
1496 BFD_JUMP_TABLE_LINK (_bfd_ecoff),
1497 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1498
1499 NULL,
1500
1501 & mips_ecoff_backend_data
1502 };
1503