1 /* MSP430-specific support for 32-bit ELF
2 Copyright (C) 2002-2016 Free Software Foundation, Inc.
3 Contributed by Dmitry Diky <diwil@mail.ru>
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
24 #include "libiberty.h"
27 #include "elf/msp430.h"
29 static bfd_reloc_status_type
30 rl78_sym_diff_handler (bfd * abfd,
32 asymbol * sym ATTRIBUTE_UNUSED,
33 void * addr ATTRIBUTE_UNUSED,
35 bfd * out_bfd ATTRIBUTE_UNUSED,
36 char ** error_message ATTRIBUTE_UNUSED)
39 octets = reloc->address * bfd_octets_per_byte (abfd);
41 /* Catch the case where bfd_install_relocation would return
42 bfd_reloc_outofrange because the SYM_DIFF reloc is being used in a very
43 small section. It does not actually matter if this happens because all
44 that SYM_DIFF does is compute a (4-byte) value. A second reloc then uses
45 this value, and it is that reloc that must fit into the section.
47 This happens in eg, gcc/testsuite/gcc.c-torture/compile/labels-3.c. */
48 if ((octets + bfd_get_reloc_size (reloc->howto))
49 > bfd_get_section_limit_octets (abfd, input_sec))
51 return bfd_reloc_continue;
54 static reloc_howto_type elf_msp430_howto_table[] =
56 HOWTO (R_MSP430_NONE, /* type */
58 3, /* size (0 = byte, 1 = short, 2 = long) */
60 FALSE, /* pc_relative */
62 complain_overflow_dont,/* complain_on_overflow */
63 bfd_elf_generic_reloc, /* special_function */
64 "R_MSP430_NONE", /* name */
65 FALSE, /* partial_inplace */
68 FALSE), /* pcrel_offset */
70 HOWTO (R_MSP430_32, /* type */
72 2, /* size (0 = byte, 1 = short, 2 = long) */
74 FALSE, /* pc_relative */
76 complain_overflow_bitfield,/* complain_on_overflow */
77 bfd_elf_generic_reloc, /* special_function */
78 "R_MSP430_32", /* name */
79 FALSE, /* partial_inplace */
80 0xffffffff, /* src_mask */
81 0xffffffff, /* dst_mask */
82 FALSE), /* pcrel_offset */
84 /* A 10 bit PC relative relocation. */
85 HOWTO (R_MSP430_10_PCREL, /* type */
87 1, /* size (0 = byte, 1 = short, 2 = long) */
89 TRUE, /* pc_relative */
91 complain_overflow_bitfield,/* complain_on_overflow */
92 bfd_elf_generic_reloc, /* special_function */
93 "R_MSP430_10_PCREL", /* name */
94 FALSE, /* partial_inplace */
97 TRUE), /* pcrel_offset */
99 /* A 16 bit absolute relocation. */
100 HOWTO (R_MSP430_16, /* type */
102 1, /* size (0 = byte, 1 = short, 2 = long) */
104 FALSE, /* pc_relative */
106 complain_overflow_dont,/* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_MSP430_16", /* name */
109 FALSE, /* partial_inplace */
111 0xffff, /* dst_mask */
112 FALSE), /* pcrel_offset */
114 /* A 16 bit PC relative relocation for command address. */
115 HOWTO (R_MSP430_16_PCREL, /* type */
117 1, /* size (0 = byte, 1 = short, 2 = long) */
119 TRUE, /* pc_relative */
121 complain_overflow_dont,/* complain_on_overflow */
122 bfd_elf_generic_reloc, /* special_function */
123 "R_MSP430_16_PCREL", /* name */
124 FALSE, /* partial_inplace */
126 0xffff, /* dst_mask */
127 TRUE), /* pcrel_offset */
129 /* A 16 bit absolute relocation, byte operations. */
130 HOWTO (R_MSP430_16_BYTE, /* type */
132 1, /* size (0 = byte, 1 = short, 2 = long) */
134 FALSE, /* pc_relative */
136 complain_overflow_dont,/* complain_on_overflow */
137 bfd_elf_generic_reloc, /* special_function */
138 "R_MSP430_16_BYTE", /* name */
139 FALSE, /* partial_inplace */
140 0xffff, /* src_mask */
141 0xffff, /* dst_mask */
142 FALSE), /* pcrel_offset */
144 /* A 16 bit absolute relocation for command address. */
145 HOWTO (R_MSP430_16_PCREL_BYTE,/* type */
147 1, /* size (0 = byte, 1 = short, 2 = long) */
149 TRUE, /* pc_relative */
151 complain_overflow_dont,/* complain_on_overflow */
152 bfd_elf_generic_reloc, /* special_function */
153 "R_MSP430_16_PCREL_BYTE",/* name */
154 FALSE, /* partial_inplace */
155 0xffff, /* src_mask */
156 0xffff, /* dst_mask */
157 TRUE), /* pcrel_offset */
159 /* A 10 bit PC relative relocation for complicated polymorphs. */
160 HOWTO (R_MSP430_2X_PCREL, /* type */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
164 TRUE, /* pc_relative */
166 complain_overflow_bitfield,/* complain_on_overflow */
167 bfd_elf_generic_reloc, /* special_function */
168 "R_MSP430_2X_PCREL", /* name */
169 FALSE, /* partial_inplace */
170 0x3ff, /* src_mask */
171 0x3ff, /* dst_mask */
172 TRUE), /* pcrel_offset */
174 /* A 16 bit relaxable relocation for command address. */
175 HOWTO (R_MSP430_RL_PCREL, /* type */
177 1, /* size (0 = byte, 1 = short, 2 = long) */
179 TRUE, /* pc_relative */
181 complain_overflow_dont,/* complain_on_overflow */
182 bfd_elf_generic_reloc, /* special_function */
183 "R_MSP430_RL_PCREL", /* name */
184 FALSE, /* partial_inplace */
186 0xffff, /* dst_mask */
187 TRUE) /* pcrel_offset */
189 /* A 8-bit absolute relocation. */
190 , HOWTO (R_MSP430_8, /* type */
192 0, /* size (0 = byte, 1 = short, 2 = long) */
194 FALSE, /* pc_relative */
196 complain_overflow_dont,/* complain_on_overflow */
197 bfd_elf_generic_reloc, /* special_function */
198 "R_MSP430_8", /* name */
199 FALSE, /* partial_inplace */
201 0xffff, /* dst_mask */
202 FALSE), /* pcrel_offset */
204 /* Together with a following reloc, allows for the difference
205 between two symbols to be the real addend of the second reloc. */
206 HOWTO (R_MSP430_SYM_DIFF, /* type */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
210 FALSE, /* pc_relative */
212 complain_overflow_dont,/* complain_on_overflow */
213 rl78_sym_diff_handler, /* special handler. */
214 "R_MSP430_SYM_DIFF", /* name */
215 FALSE, /* partial_inplace */
216 0xffffffff, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE) /* pcrel_offset */
221 static reloc_howto_type elf_msp430x_howto_table[] =
223 HOWTO (R_MSP430_NONE, /* type */
225 3, /* size (0 = byte, 1 = short, 2 = long) */
227 FALSE, /* pc_relative */
229 complain_overflow_dont,/* complain_on_overflow */
230 bfd_elf_generic_reloc, /* special_function */
231 "R_MSP430_NONE", /* name */
232 FALSE, /* partial_inplace */
235 FALSE), /* pcrel_offset */
237 HOWTO (R_MSP430_ABS32, /* type */
239 2, /* size (0 = byte, 1 = short, 2 = long) */
241 FALSE, /* pc_relative */
243 complain_overflow_bitfield,/* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_MSP430_ABS32", /* name */
246 FALSE, /* partial_inplace */
247 0xffffffff, /* src_mask */
248 0xffffffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
251 HOWTO (R_MSP430_ABS16, /* type */
253 1, /* size (0 = byte, 1 = short, 2 = long) */
255 FALSE, /* pc_relative */
257 complain_overflow_dont,/* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_MSP430_ABS16", /* name */
260 FALSE, /* partial_inplace */
262 0xffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
265 HOWTO (R_MSP430_ABS8, /* type */
267 0, /* size (0 = byte, 1 = short, 2 = long) */
269 FALSE, /* pc_relative */
271 complain_overflow_bitfield,/* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_MSP430_ABS8", /* name */
274 FALSE, /* partial_inplace */
277 FALSE), /* pcrel_offset */
279 HOWTO (R_MSP430_PCR16, /* type */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
283 TRUE, /* pc_relative */
285 complain_overflow_dont,/* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_MSP430_PCR16", /* name */
288 FALSE, /* partial_inplace */
290 0xffff, /* dst_mask */
291 TRUE), /* pcrel_offset */
293 HOWTO (R_MSP430X_PCR20_EXT_SRC,/* type */
295 2, /* size (0 = byte, 1 = short, 2 = long) */
297 TRUE, /* pc_relative */
299 complain_overflow_dont,/* complain_on_overflow */
300 bfd_elf_generic_reloc, /* special_function */
301 "R_MSP430X_PCR20_EXT_SRC",/* name */
302 FALSE, /* partial_inplace */
304 0xffff, /* dst_mask */
305 TRUE), /* pcrel_offset */
307 HOWTO (R_MSP430X_PCR20_EXT_DST,/* type */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
311 TRUE, /* pc_relative */
313 complain_overflow_dont,/* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_MSP430X_PCR20_EXT_DST",/* name */
316 FALSE, /* partial_inplace */
318 0xffff, /* dst_mask */
319 TRUE), /* pcrel_offset */
321 HOWTO (R_MSP430X_PCR20_EXT_ODST,/* type */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
325 TRUE, /* pc_relative */
327 complain_overflow_dont,/* complain_on_overflow */
328 bfd_elf_generic_reloc, /* special_function */
329 "R_MSP430X_PCR20_EXT_ODST",/* name */
330 FALSE, /* partial_inplace */
332 0xffff, /* dst_mask */
333 TRUE), /* pcrel_offset */
335 HOWTO (R_MSP430X_ABS20_EXT_SRC,/* type */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
339 TRUE, /* pc_relative */
341 complain_overflow_dont,/* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_MSP430X_ABS20_EXT_SRC",/* name */
344 FALSE, /* partial_inplace */
346 0xffff, /* dst_mask */
347 TRUE), /* pcrel_offset */
349 HOWTO (R_MSP430X_ABS20_EXT_DST,/* type */
351 2, /* size (0 = byte, 1 = short, 2 = long) */
353 TRUE, /* pc_relative */
355 complain_overflow_dont,/* complain_on_overflow */
356 bfd_elf_generic_reloc, /* special_function */
357 "R_MSP430X_ABS20_EXT_DST",/* name */
358 FALSE, /* partial_inplace */
360 0xffff, /* dst_mask */
361 TRUE), /* pcrel_offset */
363 HOWTO (R_MSP430X_ABS20_EXT_ODST,/* type */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
367 TRUE, /* pc_relative */
369 complain_overflow_dont,/* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_MSP430X_ABS20_EXT_ODST",/* name */
372 FALSE, /* partial_inplace */
374 0xffff, /* dst_mask */
375 TRUE), /* pcrel_offset */
377 HOWTO (R_MSP430X_ABS20_ADR_SRC,/* type */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
381 TRUE, /* pc_relative */
383 complain_overflow_dont,/* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_MSP430X_ABS20_ADR_SRC",/* name */
386 FALSE, /* partial_inplace */
388 0xffff, /* dst_mask */
389 TRUE), /* pcrel_offset */
391 HOWTO (R_MSP430X_ABS20_ADR_DST,/* type */
393 2, /* size (0 = byte, 1 = short, 2 = long) */
395 TRUE, /* pc_relative */
397 complain_overflow_dont,/* complain_on_overflow */
398 bfd_elf_generic_reloc, /* special_function */
399 "R_MSP430X_ABS20_ADR_DST",/* name */
400 FALSE, /* partial_inplace */
402 0xffff, /* dst_mask */
403 TRUE), /* pcrel_offset */
405 HOWTO (R_MSP430X_PCR16, /* type */
407 2, /* size (0 = byte, 1 = short, 2 = long) */
409 TRUE, /* pc_relative */
411 complain_overflow_dont,/* complain_on_overflow */
412 bfd_elf_generic_reloc, /* special_function */
413 "R_MSP430X_PCR16", /* name */
414 FALSE, /* partial_inplace */
416 0xffff, /* dst_mask */
417 TRUE), /* pcrel_offset */
419 HOWTO (R_MSP430X_PCR20_CALL, /* type */
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 TRUE, /* pc_relative */
425 complain_overflow_dont,/* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_MSP430X_PCR20_CALL",/* name */
428 FALSE, /* partial_inplace */
430 0xffff, /* dst_mask */
431 TRUE), /* pcrel_offset */
433 HOWTO (R_MSP430X_ABS16, /* type */
435 2, /* size (0 = byte, 1 = short, 2 = long) */
437 TRUE, /* pc_relative */
439 complain_overflow_dont,/* complain_on_overflow */
440 bfd_elf_generic_reloc, /* special_function */
441 "R_MSP430X_ABS16", /* name */
442 FALSE, /* partial_inplace */
444 0xffff, /* dst_mask */
445 TRUE), /* pcrel_offset */
447 HOWTO (R_MSP430_ABS_HI16, /* type */
449 2, /* size (0 = byte, 1 = short, 2 = long) */
451 TRUE, /* pc_relative */
453 complain_overflow_dont,/* complain_on_overflow */
454 bfd_elf_generic_reloc, /* special_function */
455 "R_MSP430_ABS_HI16", /* name */
456 FALSE, /* partial_inplace */
458 0xffff, /* dst_mask */
459 TRUE), /* pcrel_offset */
461 HOWTO (R_MSP430_PREL31, /* type */
463 2, /* size (0 = byte, 1 = short, 2 = long) */
465 TRUE, /* pc_relative */
467 complain_overflow_dont,/* complain_on_overflow */
468 bfd_elf_generic_reloc, /* special_function */
469 "R_MSP430_PREL31", /* name */
470 FALSE, /* partial_inplace */
472 0xffff, /* dst_mask */
473 TRUE), /* pcrel_offset */
475 EMPTY_HOWTO (R_MSP430_EHTYPE),
477 /* A 10 bit PC relative relocation. */
478 HOWTO (R_MSP430X_10_PCREL, /* type */
480 1, /* size (0 = byte, 1 = short, 2 = long) */
482 TRUE, /* pc_relative */
484 complain_overflow_bitfield,/* complain_on_overflow */
485 bfd_elf_generic_reloc, /* special_function */
486 "R_MSP430X_10_PCREL", /* name */
487 FALSE, /* partial_inplace */
488 0x3ff, /* src_mask */
489 0x3ff, /* dst_mask */
490 TRUE), /* pcrel_offset */
492 /* A 10 bit PC relative relocation for complicated polymorphs. */
493 HOWTO (R_MSP430X_2X_PCREL, /* type */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
497 TRUE, /* pc_relative */
499 complain_overflow_bitfield,/* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_MSP430X_2X_PCREL", /* name */
502 FALSE, /* partial_inplace */
503 0x3ff, /* src_mask */
504 0x3ff, /* dst_mask */
505 TRUE), /* pcrel_offset */
507 /* Together with a following reloc, allows for the difference
508 between two symbols to be the real addend of the second reloc. */
509 HOWTO (R_MSP430X_SYM_DIFF, /* type */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
513 FALSE, /* pc_relative */
515 complain_overflow_dont,/* complain_on_overflow */
516 rl78_sym_diff_handler, /* special handler. */
517 "R_MSP430X_SYM_DIFF", /* name */
518 FALSE, /* partial_inplace */
519 0xffffffff, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE) /* pcrel_offset */
524 /* Map BFD reloc types to MSP430 ELF reloc types. */
526 struct msp430_reloc_map
528 bfd_reloc_code_real_type bfd_reloc_val;
529 unsigned int elf_reloc_val;
532 static const struct msp430_reloc_map msp430_reloc_map[] =
534 {BFD_RELOC_NONE, R_MSP430_NONE},
535 {BFD_RELOC_32, R_MSP430_32},
536 {BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL},
537 {BFD_RELOC_16, R_MSP430_16_BYTE},
538 {BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL},
539 {BFD_RELOC_MSP430_16, R_MSP430_16},
540 {BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE},
541 {BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE},
542 {BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL},
543 {BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL},
544 {BFD_RELOC_8, R_MSP430_8},
545 {BFD_RELOC_MSP430_SYM_DIFF, R_MSP430_SYM_DIFF}
548 static const struct msp430_reloc_map msp430x_reloc_map[] =
550 {BFD_RELOC_NONE, R_MSP430_NONE},
551 {BFD_RELOC_32, R_MSP430_ABS32},
552 {BFD_RELOC_16, R_MSP430_ABS16},
553 {BFD_RELOC_8, R_MSP430_ABS8},
554 {BFD_RELOC_MSP430_ABS8, R_MSP430_ABS8},
555 {BFD_RELOC_MSP430X_PCR20_EXT_SRC, R_MSP430X_PCR20_EXT_SRC},
556 {BFD_RELOC_MSP430X_PCR20_EXT_DST, R_MSP430X_PCR20_EXT_DST},
557 {BFD_RELOC_MSP430X_PCR20_EXT_ODST, R_MSP430X_PCR20_EXT_ODST},
558 {BFD_RELOC_MSP430X_ABS20_EXT_SRC, R_MSP430X_ABS20_EXT_SRC},
559 {BFD_RELOC_MSP430X_ABS20_EXT_DST, R_MSP430X_ABS20_EXT_DST},
560 {BFD_RELOC_MSP430X_ABS20_EXT_ODST, R_MSP430X_ABS20_EXT_ODST},
561 {BFD_RELOC_MSP430X_ABS20_ADR_SRC, R_MSP430X_ABS20_ADR_SRC},
562 {BFD_RELOC_MSP430X_ABS20_ADR_DST, R_MSP430X_ABS20_ADR_DST},
563 {BFD_RELOC_MSP430X_PCR16, R_MSP430X_PCR16},
564 {BFD_RELOC_MSP430X_PCR20_CALL, R_MSP430X_PCR20_CALL},
565 {BFD_RELOC_MSP430X_ABS16, R_MSP430X_ABS16},
566 {BFD_RELOC_MSP430_ABS_HI16, R_MSP430_ABS_HI16},
567 {BFD_RELOC_MSP430_PREL31, R_MSP430_PREL31},
568 {BFD_RELOC_MSP430_10_PCREL, R_MSP430X_10_PCREL},
569 {BFD_RELOC_MSP430_2X_PCREL, R_MSP430X_2X_PCREL},
570 {BFD_RELOC_MSP430_RL_PCREL, R_MSP430X_PCR16},
571 {BFD_RELOC_MSP430_SYM_DIFF, R_MSP430X_SYM_DIFF}
574 static inline bfd_boolean
575 uses_msp430x_relocs (bfd * abfd)
577 extern const bfd_target msp430_elf32_ti_vec;
579 return bfd_get_mach (abfd) == bfd_mach_msp430x
580 || abfd->xvec == & msp430_elf32_ti_vec;
583 static reloc_howto_type *
584 bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
585 bfd_reloc_code_real_type code)
589 if (uses_msp430x_relocs (abfd))
591 for (i = ARRAY_SIZE (msp430x_reloc_map); i--;)
592 if (msp430x_reloc_map[i].bfd_reloc_val == code)
593 return elf_msp430x_howto_table + msp430x_reloc_map[i].elf_reloc_val;
597 for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++)
598 if (msp430_reloc_map[i].bfd_reloc_val == code)
599 return &elf_msp430_howto_table[msp430_reloc_map[i].elf_reloc_val];
605 static reloc_howto_type *
606 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
611 if (uses_msp430x_relocs (abfd))
613 for (i = ARRAY_SIZE (elf_msp430x_howto_table); i--;)
614 if (elf_msp430x_howto_table[i].name != NULL
615 && strcasecmp (elf_msp430x_howto_table[i].name, r_name) == 0)
616 return elf_msp430x_howto_table + i;
621 i < (sizeof (elf_msp430_howto_table)
622 / sizeof (elf_msp430_howto_table[0]));
624 if (elf_msp430_howto_table[i].name != NULL
625 && strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0)
626 return &elf_msp430_howto_table[i];
632 /* Set the howto pointer for an MSP430 ELF reloc. */
635 msp430_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
637 Elf_Internal_Rela * dst)
641 r_type = ELF32_R_TYPE (dst->r_info);
643 if (uses_msp430x_relocs (abfd))
645 if (r_type >= (unsigned int) R_MSP430x_max)
647 _bfd_error_handler (_("%B: invalid MSP430X reloc number: %d"), abfd, r_type);
650 cache_ptr->howto = elf_msp430x_howto_table + r_type;
654 if (r_type >= (unsigned int) R_MSP430_max)
656 _bfd_error_handler (_("%B: invalid MSP430 reloc number: %d"), abfd, r_type);
659 cache_ptr->howto = &elf_msp430_howto_table[r_type];
662 /* Look through the relocs for a section during the first phase.
663 Since we don't do .gots or .plts, we just need to consider the
664 virtual table relocs for gc. */
667 elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info,
668 asection * sec, const Elf_Internal_Rela * relocs)
670 Elf_Internal_Shdr *symtab_hdr;
671 struct elf_link_hash_entry **sym_hashes;
672 const Elf_Internal_Rela *rel;
673 const Elf_Internal_Rela *rel_end;
675 if (bfd_link_relocatable (info))
678 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
679 sym_hashes = elf_sym_hashes (abfd);
681 rel_end = relocs + sec->reloc_count;
682 for (rel = relocs; rel < rel_end; rel++)
684 struct elf_link_hash_entry *h;
685 unsigned long r_symndx;
687 r_symndx = ELF32_R_SYM (rel->r_info);
688 if (r_symndx < symtab_hdr->sh_info)
692 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
693 while (h->root.type == bfd_link_hash_indirect
694 || h->root.type == bfd_link_hash_warning)
695 h = (struct elf_link_hash_entry *) h->root.u.i.link;
697 /* PR15323, ref flags aren't set for references in the same
699 h->root.non_ir_ref = 1;
706 /* Perform a single relocation. By default we use the standard BFD
707 routines, but a few relocs, we have to do them ourselves. */
709 static bfd_reloc_status_type
710 msp430_final_link_relocate (reloc_howto_type * howto,
712 asection * input_section,
714 Elf_Internal_Rela * rel,
716 struct bfd_link_info * info)
718 static asection * sym_diff_section;
719 static bfd_vma sym_diff_value;
721 struct bfd_elf_section_data * esd = elf_section_data (input_section);
722 bfd_reloc_status_type r = bfd_reloc_ok;
725 bfd_boolean is_rel_reloc = FALSE;
727 if (uses_msp430x_relocs (input_bfd))
729 /* See if we have a REL type relocation. */
730 is_rel_reloc = (esd->rel.hdr != NULL);
731 /* Sanity check - only one type of relocation per section.
732 FIXME: Theoretically it is possible to have both types,
733 but if that happens how can we distinguish between the two ? */
734 BFD_ASSERT (! is_rel_reloc || ! esd->rela.hdr);
735 /* If we are using a REL relocation then the addend should be empty. */
736 BFD_ASSERT (! is_rel_reloc || rel->r_addend == 0);
739 if (sym_diff_section != NULL)
741 BFD_ASSERT (sym_diff_section == input_section);
743 if (uses_msp430x_relocs (input_bfd))
747 /* If we are computing a 32-bit value for the location lists
748 and the result is 0 then we add one to the value. A zero
749 value can result because of linker relaxation deleteing
750 prologue instructions and using a value of 1 (for the begin
751 and end offsets in the location list entry) results in a
752 nul entry which does not prevent the following entries from
754 if (relocation == sym_diff_value
755 && strcmp (input_section->name, ".debug_loc") == 0)
759 case R_MSP430X_ABS16:
761 BFD_ASSERT (! is_rel_reloc);
762 relocation -= sym_diff_value;
766 return bfd_reloc_dangerous;
773 case R_MSP430_16_BYTE:
775 relocation -= sym_diff_value;
779 return bfd_reloc_dangerous;
782 sym_diff_section = NULL;
785 if (uses_msp430x_relocs (input_bfd))
788 case R_MSP430X_SYM_DIFF:
789 /* Cache the input section and value.
790 The offset is unreliable, since relaxation may
791 have reduced the following reloc's offset. */
792 BFD_ASSERT (! is_rel_reloc);
793 sym_diff_section = input_section;
794 sym_diff_value = relocation;
798 contents += rel->r_offset;
799 srel = (bfd_signed_vma) relocation;
801 srel += bfd_get_16 (input_bfd, contents);
803 srel += rel->r_addend;
804 bfd_put_16 (input_bfd, srel & 0xffff, contents);
807 case R_MSP430X_10_PCREL:
808 contents += rel->r_offset;
809 srel = (bfd_signed_vma) relocation;
811 srel += bfd_get_16 (input_bfd, contents) & 0x3ff;
813 srel += rel->r_addend;
814 srel -= rel->r_offset;
815 srel -= 2; /* Branch instructions add 2 to the PC... */
816 srel -= (input_section->output_section->vma +
817 input_section->output_offset);
819 return bfd_reloc_outofrange;
821 /* MSP430 addresses commands as words. */
824 /* Check for an overflow. */
825 if (srel < -512 || srel > 511)
827 if (info->disable_target_specific_optimizations < 0)
829 static bfd_boolean warned = FALSE;
832 info->callbacks->warning
834 _("Try enabling relaxation to avoid relocation truncations"),
835 NULL, input_bfd, input_section, relocation);
839 return bfd_reloc_overflow;
842 x = bfd_get_16 (input_bfd, contents);
843 x = (x & 0xfc00) | (srel & 0x3ff);
844 bfd_put_16 (input_bfd, x, contents);
847 case R_MSP430X_PCR20_EXT_ODST:
848 /* [0,4]+[48,16] = ---F ---- ---- FFFF */
849 contents += rel->r_offset;
850 srel = (bfd_signed_vma) relocation;
854 addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
855 addend |= bfd_get_16 (input_bfd, contents + 6);
860 srel += rel->r_addend;
861 srel -= rel->r_offset;
862 srel -= (input_section->output_section->vma +
863 input_section->output_offset);
864 bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6);
865 x = bfd_get_16 (input_bfd, contents);
866 x = (x & 0xfff0) | ((srel >> 16) & 0xf);
867 bfd_put_16 (input_bfd, x, contents);
870 case R_MSP430X_ABS20_EXT_SRC:
871 /* [7,4]+[32,16] = -78- ---- FFFF */
872 contents += rel->r_offset;
873 srel = (bfd_signed_vma) relocation;
877 addend = (bfd_get_16 (input_bfd, contents) & 0x0780) << 9;
878 addend |= bfd_get_16 (input_bfd, contents + 4);
882 srel += rel->r_addend;
883 bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
885 x = bfd_get_16 (input_bfd, contents);
886 x = (x & 0xf87f) | ((srel << 7) & 0x0780);
887 bfd_put_16 (input_bfd, x, contents);
890 case R_MSP430_16_PCREL:
891 contents += rel->r_offset;
892 srel = (bfd_signed_vma) relocation;
894 srel += bfd_get_16 (input_bfd, contents);
896 srel += rel->r_addend;
897 srel -= rel->r_offset;
898 /* Only branch instructions add 2 to the PC... */
899 srel -= (input_section->output_section->vma +
900 input_section->output_offset);
902 return bfd_reloc_outofrange;
903 bfd_put_16 (input_bfd, srel & 0xffff, contents);
906 case R_MSP430X_PCR20_EXT_DST:
907 /* [0,4]+[32,16] = ---F ---- FFFF */
908 contents += rel->r_offset;
909 srel = (bfd_signed_vma) relocation;
913 addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
914 addend |= bfd_get_16 (input_bfd, contents + 4);
918 srel += rel->r_addend;
919 srel -= rel->r_offset;
920 srel -= (input_section->output_section->vma +
921 input_section->output_offset);
922 bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
924 x = bfd_get_16 (input_bfd, contents);
925 x = (x & 0xfff0) | (srel & 0xf);
926 bfd_put_16 (input_bfd, x, contents);
929 case R_MSP430X_PCR20_EXT_SRC:
930 /* [7,4]+[32,16] = -78- ---- FFFF */
931 contents += rel->r_offset;
932 srel = (bfd_signed_vma) relocation;
936 addend = ((bfd_get_16 (input_bfd, contents) & 0x0780) << 9);
937 addend |= bfd_get_16 (input_bfd, contents + 4);
941 srel += rel->r_addend;
942 srel -= rel->r_offset;
943 /* Only branch instructions add 2 to the PC... */
944 srel -= (input_section->output_section->vma +
945 input_section->output_offset);
946 bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
948 x = bfd_get_16 (input_bfd, contents);
949 x = (x & 0xf87f) | ((srel << 7) & 0x0780);
950 bfd_put_16 (input_bfd, x, contents);
954 contents += rel->r_offset;
955 srel = (bfd_signed_vma) relocation;
957 srel += bfd_get_8 (input_bfd, contents);
959 srel += rel->r_addend;
960 bfd_put_8 (input_bfd, srel & 0xff, contents);
963 case R_MSP430X_ABS20_EXT_DST:
964 /* [0,4]+[32,16] = ---F ---- FFFF */
965 contents += rel->r_offset;
966 srel = (bfd_signed_vma) relocation;
970 addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
971 addend |= bfd_get_16 (input_bfd, contents + 4);
975 srel += rel->r_addend;
976 bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
978 x = bfd_get_16 (input_bfd, contents);
979 x = (x & 0xfff0) | (srel & 0xf);
980 bfd_put_16 (input_bfd, x, contents);
983 case R_MSP430X_ABS20_EXT_ODST:
984 /* [0,4]+[48,16] = ---F ---- ---- FFFF */
985 contents += rel->r_offset;
986 srel = (bfd_signed_vma) relocation;
990 addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
991 addend |= bfd_get_16 (input_bfd, contents + 6);
995 srel += rel->r_addend;
996 bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6);
998 x = bfd_get_16 (input_bfd, contents);
999 x = (x & 0xfff0) | (srel & 0xf);
1000 bfd_put_16 (input_bfd, x, contents);
1003 case R_MSP430X_ABS20_ADR_SRC:
1004 /* [8,4]+[16,16] = -F-- FFFF */
1005 contents += rel->r_offset;
1006 srel = (bfd_signed_vma) relocation;
1011 addend = ((bfd_get_16 (input_bfd, contents) & 0xf00) << 8);
1012 addend |= bfd_get_16 (input_bfd, contents + 2);
1016 srel += rel->r_addend;
1017 bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2);
1019 x = bfd_get_16 (input_bfd, contents);
1020 x = (x & 0xf0ff) | ((srel << 8) & 0x0f00);
1021 bfd_put_16 (input_bfd, x, contents);
1024 case R_MSP430X_ABS20_ADR_DST:
1025 /* [0,4]+[16,16] = ---F FFFF */
1026 contents += rel->r_offset;
1027 srel = (bfd_signed_vma) relocation;
1031 addend = ((bfd_get_16 (input_bfd, contents) & 0xf) << 16);
1032 addend |= bfd_get_16 (input_bfd, contents + 2);
1036 srel += rel->r_addend;
1037 bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2);
1039 x = bfd_get_16 (input_bfd, contents);
1040 x = (x & 0xfff0) | (srel & 0xf);
1041 bfd_put_16 (input_bfd, x, contents);
1044 case R_MSP430X_ABS16:
1045 contents += rel->r_offset;
1046 srel = (bfd_signed_vma) relocation;
1048 srel += bfd_get_16 (input_bfd, contents);
1050 srel += rel->r_addend;
1053 return bfd_reloc_overflow;
1054 bfd_put_16 (input_bfd, srel & 0xffff, contents);
1057 case R_MSP430_ABS_HI16:
1058 /* The EABI specifies that this must be a RELA reloc. */
1059 BFD_ASSERT (! is_rel_reloc);
1060 contents += rel->r_offset;
1061 srel = (bfd_signed_vma) relocation;
1062 srel += rel->r_addend;
1063 bfd_put_16 (input_bfd, (srel >> 16) & 0xffff, contents);
1066 case R_MSP430X_PCR20_CALL:
1067 /* [0,4]+[16,16] = ---F FFFF*/
1068 contents += rel->r_offset;
1069 srel = (bfd_signed_vma) relocation;
1073 addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
1074 addend |= bfd_get_16 (input_bfd, contents + 2);
1078 srel += rel->r_addend;
1079 srel -= rel->r_offset;
1080 srel -= (input_section->output_section->vma +
1081 input_section->output_offset);
1082 bfd_put_16 (input_bfd, srel & 0xffff, contents + 2);
1084 x = bfd_get_16 (input_bfd, contents);
1085 x = (x & 0xfff0) | (srel & 0xf);
1086 bfd_put_16 (input_bfd, x, contents);
1089 case R_MSP430X_PCR16:
1090 contents += rel->r_offset;
1091 srel = (bfd_signed_vma) relocation;
1093 srel += bfd_get_16 (input_bfd, contents);
1095 srel += rel->r_addend;
1096 srel -= rel->r_offset;
1097 srel -= (input_section->output_section->vma +
1098 input_section->output_offset);
1099 bfd_put_16 (input_bfd, srel & 0xffff, contents);
1102 case R_MSP430_PREL31:
1103 contents += rel->r_offset;
1104 srel = (bfd_signed_vma) relocation;
1106 srel += (bfd_get_32 (input_bfd, contents) & 0x7fffffff);
1108 srel += rel->r_addend;
1109 srel += rel->r_addend;
1110 x = bfd_get_32 (input_bfd, contents);
1111 x = (x & 0x80000000) | ((srel >> 31) & 0x7fffffff);
1112 bfd_put_32 (input_bfd, x, contents);
1116 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1117 contents, rel->r_offset,
1118 relocation, rel->r_addend);
1121 switch (howto->type)
1123 case R_MSP430_10_PCREL:
1124 contents += rel->r_offset;
1125 srel = (bfd_signed_vma) relocation;
1126 srel += rel->r_addend;
1127 srel -= rel->r_offset;
1128 srel -= 2; /* Branch instructions add 2 to the PC... */
1129 srel -= (input_section->output_section->vma +
1130 input_section->output_offset);
1133 return bfd_reloc_outofrange;
1135 /* MSP430 addresses commands as words. */
1138 /* Check for an overflow. */
1139 if (srel < -512 || srel > 511)
1141 if (info->disable_target_specific_optimizations < 0)
1143 static bfd_boolean warned = FALSE;
1146 info->callbacks->warning
1148 _("Try enabling relaxation to avoid relocation truncations"),
1149 NULL, input_bfd, input_section, relocation);
1153 return bfd_reloc_overflow;
1156 x = bfd_get_16 (input_bfd, contents);
1157 x = (x & 0xfc00) | (srel & 0x3ff);
1158 bfd_put_16 (input_bfd, x, contents);
1161 case R_MSP430_2X_PCREL:
1162 contents += rel->r_offset;
1163 srel = (bfd_signed_vma) relocation;
1164 srel += rel->r_addend;
1165 srel -= rel->r_offset;
1166 srel -= 2; /* Branch instructions add 2 to the PC... */
1167 srel -= (input_section->output_section->vma +
1168 input_section->output_offset);
1171 return bfd_reloc_outofrange;
1173 /* MSP430 addresses commands as words. */
1176 /* Check for an overflow. */
1177 if (srel < -512 || srel > 511)
1178 return bfd_reloc_overflow;
1180 x = bfd_get_16 (input_bfd, contents);
1181 x = (x & 0xfc00) | (srel & 0x3ff);
1182 bfd_put_16 (input_bfd, x, contents);
1183 /* Handle second jump instruction. */
1184 x = bfd_get_16 (input_bfd, contents - 2);
1186 x = (x & 0xfc00) | (srel & 0x3ff);
1187 bfd_put_16 (input_bfd, x, contents - 2);
1190 case R_MSP430_RL_PCREL:
1191 case R_MSP430_16_PCREL:
1192 contents += rel->r_offset;
1193 srel = (bfd_signed_vma) relocation;
1194 srel += rel->r_addend;
1195 srel -= rel->r_offset;
1196 /* Only branch instructions add 2 to the PC... */
1197 srel -= (input_section->output_section->vma +
1198 input_section->output_offset);
1201 return bfd_reloc_outofrange;
1203 bfd_put_16 (input_bfd, srel & 0xffff, contents);
1206 case R_MSP430_16_PCREL_BYTE:
1207 contents += rel->r_offset;
1208 srel = (bfd_signed_vma) relocation;
1209 srel += rel->r_addend;
1210 srel -= rel->r_offset;
1211 /* Only branch instructions add 2 to the PC... */
1212 srel -= (input_section->output_section->vma +
1213 input_section->output_offset);
1215 bfd_put_16 (input_bfd, srel & 0xffff, contents);
1218 case R_MSP430_16_BYTE:
1219 contents += rel->r_offset;
1220 srel = (bfd_signed_vma) relocation;
1221 srel += rel->r_addend;
1222 bfd_put_16 (input_bfd, srel & 0xffff, contents);
1226 contents += rel->r_offset;
1227 srel = (bfd_signed_vma) relocation;
1228 srel += rel->r_addend;
1231 return bfd_reloc_notsupported;
1233 bfd_put_16 (input_bfd, srel & 0xffff, contents);
1237 contents += rel->r_offset;
1238 srel = (bfd_signed_vma) relocation;
1239 srel += rel->r_addend;
1241 bfd_put_8 (input_bfd, srel & 0xff, contents);
1244 case R_MSP430_SYM_DIFF:
1245 /* Cache the input section and value.
1246 The offset is unreliable, since relaxation may
1247 have reduced the following reloc's offset. */
1248 sym_diff_section = input_section;
1249 sym_diff_value = relocation;
1250 return bfd_reloc_ok;
1253 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1254 contents, rel->r_offset,
1255 relocation, rel->r_addend);
1261 /* Relocate an MSP430 ELF section. */
1264 elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
1265 struct bfd_link_info * info,
1267 asection * input_section,
1268 bfd_byte * contents,
1269 Elf_Internal_Rela * relocs,
1270 Elf_Internal_Sym * local_syms,
1271 asection ** local_sections)
1273 Elf_Internal_Shdr *symtab_hdr;
1274 struct elf_link_hash_entry **sym_hashes;
1275 Elf_Internal_Rela *rel;
1276 Elf_Internal_Rela *relend;
1278 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1279 sym_hashes = elf_sym_hashes (input_bfd);
1280 relend = relocs + input_section->reloc_count;
1282 for (rel = relocs; rel < relend; rel++)
1284 reloc_howto_type *howto;
1285 unsigned long r_symndx;
1286 Elf_Internal_Sym *sym;
1288 struct elf_link_hash_entry *h;
1290 bfd_reloc_status_type r;
1291 const char *name = NULL;
1294 r_type = ELF32_R_TYPE (rel->r_info);
1295 r_symndx = ELF32_R_SYM (rel->r_info);
1297 if (uses_msp430x_relocs (input_bfd))
1298 howto = elf_msp430x_howto_table + r_type;
1300 howto = elf_msp430_howto_table + r_type;
1306 if (r_symndx < symtab_hdr->sh_info)
1308 sym = local_syms + r_symndx;
1309 sec = local_sections[r_symndx];
1310 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1312 name = bfd_elf_string_from_elf_section
1313 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1314 name = (name == NULL || * name == 0) ? bfd_section_name (input_bfd, sec) : name;
1318 bfd_boolean unresolved_reloc, warned, ignored;
1320 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1321 r_symndx, symtab_hdr, sym_hashes,
1323 unresolved_reloc, warned, ignored);
1324 name = h->root.root.string;
1327 if (sec != NULL && discarded_section (sec))
1328 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1329 rel, 1, relend, howto, 0, contents);
1331 if (bfd_link_relocatable (info))
1334 r = msp430_final_link_relocate (howto, input_bfd, input_section,
1335 contents, rel, relocation, info);
1337 if (r != bfd_reloc_ok)
1339 const char *msg = (const char *) NULL;
1343 case bfd_reloc_overflow:
1344 (*info->callbacks->reloc_overflow)
1345 (info, (h ? &h->root : NULL), name, howto->name,
1346 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1349 case bfd_reloc_undefined:
1350 (*info->callbacks->undefined_symbol)
1351 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1354 case bfd_reloc_outofrange:
1355 msg = _("internal error: branch/jump to an odd address detected");
1358 case bfd_reloc_notsupported:
1359 msg = _("internal error: unsupported relocation error");
1362 case bfd_reloc_dangerous:
1363 msg = _("internal error: dangerous relocation");
1367 msg = _("internal error: unknown error");
1372 (*info->callbacks->warning) (info, msg, name, input_bfd,
1373 input_section, rel->r_offset);
1381 /* The final processing done just before writing out a MSP430 ELF object
1382 file. This gets the MSP430 architecture right based on the machine
1386 bfd_elf_msp430_final_write_processing (bfd * abfd,
1387 bfd_boolean linker ATTRIBUTE_UNUSED)
1391 switch (bfd_get_mach (abfd))
1394 case bfd_mach_msp110: val = E_MSP430_MACH_MSP430x11x1; break;
1395 case bfd_mach_msp11: val = E_MSP430_MACH_MSP430x11; break;
1396 case bfd_mach_msp12: val = E_MSP430_MACH_MSP430x12; break;
1397 case bfd_mach_msp13: val = E_MSP430_MACH_MSP430x13; break;
1398 case bfd_mach_msp14: val = E_MSP430_MACH_MSP430x14; break;
1399 case bfd_mach_msp15: val = E_MSP430_MACH_MSP430x15; break;
1400 case bfd_mach_msp16: val = E_MSP430_MACH_MSP430x16; break;
1401 case bfd_mach_msp31: val = E_MSP430_MACH_MSP430x31; break;
1402 case bfd_mach_msp32: val = E_MSP430_MACH_MSP430x32; break;
1403 case bfd_mach_msp33: val = E_MSP430_MACH_MSP430x33; break;
1404 case bfd_mach_msp41: val = E_MSP430_MACH_MSP430x41; break;
1405 case bfd_mach_msp42: val = E_MSP430_MACH_MSP430x42; break;
1406 case bfd_mach_msp43: val = E_MSP430_MACH_MSP430x43; break;
1407 case bfd_mach_msp44: val = E_MSP430_MACH_MSP430x44; break;
1408 case bfd_mach_msp20: val = E_MSP430_MACH_MSP430x20; break;
1409 case bfd_mach_msp22: val = E_MSP430_MACH_MSP430x22; break;
1410 case bfd_mach_msp23: val = E_MSP430_MACH_MSP430x23; break;
1411 case bfd_mach_msp24: val = E_MSP430_MACH_MSP430x24; break;
1412 case bfd_mach_msp26: val = E_MSP430_MACH_MSP430x26; break;
1413 case bfd_mach_msp46: val = E_MSP430_MACH_MSP430x46; break;
1414 case bfd_mach_msp47: val = E_MSP430_MACH_MSP430x47; break;
1415 case bfd_mach_msp54: val = E_MSP430_MACH_MSP430x54; break;
1416 case bfd_mach_msp430x: val = E_MSP430_MACH_MSP430X; break;
1419 elf_elfheader (abfd)->e_machine = EM_MSP430;
1420 elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH;
1421 elf_elfheader (abfd)->e_flags |= val;
1424 /* Set the right machine number. */
1427 elf32_msp430_object_p (bfd * abfd)
1429 int e_set = bfd_mach_msp14;
1431 if (elf_elfheader (abfd)->e_machine == EM_MSP430
1432 || elf_elfheader (abfd)->e_machine == EM_MSP430_OLD)
1434 int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH;
1439 case E_MSP430_MACH_MSP430x11: e_set = bfd_mach_msp11; break;
1440 case E_MSP430_MACH_MSP430x11x1: e_set = bfd_mach_msp110; break;
1441 case E_MSP430_MACH_MSP430x12: e_set = bfd_mach_msp12; break;
1442 case E_MSP430_MACH_MSP430x13: e_set = bfd_mach_msp13; break;
1443 case E_MSP430_MACH_MSP430x14: e_set = bfd_mach_msp14; break;
1444 case E_MSP430_MACH_MSP430x15: e_set = bfd_mach_msp15; break;
1445 case E_MSP430_MACH_MSP430x16: e_set = bfd_mach_msp16; break;
1446 case E_MSP430_MACH_MSP430x31: e_set = bfd_mach_msp31; break;
1447 case E_MSP430_MACH_MSP430x32: e_set = bfd_mach_msp32; break;
1448 case E_MSP430_MACH_MSP430x33: e_set = bfd_mach_msp33; break;
1449 case E_MSP430_MACH_MSP430x41: e_set = bfd_mach_msp41; break;
1450 case E_MSP430_MACH_MSP430x42: e_set = bfd_mach_msp42; break;
1451 case E_MSP430_MACH_MSP430x43: e_set = bfd_mach_msp43; break;
1452 case E_MSP430_MACH_MSP430x44: e_set = bfd_mach_msp44; break;
1453 case E_MSP430_MACH_MSP430x20: e_set = bfd_mach_msp20; break;
1454 case E_MSP430_MACH_MSP430x22: e_set = bfd_mach_msp22; break;
1455 case E_MSP430_MACH_MSP430x23: e_set = bfd_mach_msp23; break;
1456 case E_MSP430_MACH_MSP430x24: e_set = bfd_mach_msp24; break;
1457 case E_MSP430_MACH_MSP430x26: e_set = bfd_mach_msp26; break;
1458 case E_MSP430_MACH_MSP430x46: e_set = bfd_mach_msp46; break;
1459 case E_MSP430_MACH_MSP430x47: e_set = bfd_mach_msp47; break;
1460 case E_MSP430_MACH_MSP430x54: e_set = bfd_mach_msp54; break;
1461 case E_MSP430_MACH_MSP430X: e_set = bfd_mach_msp430x; break;
1465 return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set);
1468 /* These functions handle relaxing for the msp430.
1469 Relaxation required only in two cases:
1470 - Bad hand coding like jumps from one section to another or
1472 - Sibling calls. This will affect only 'jump label' polymorph. Without
1473 relaxing this enlarges code by 2 bytes. Sibcalls implemented but
1474 do not work in gcc's port by the reason I do not know.
1475 - To convert out of range conditional jump instructions (found inside
1476 a function) into inverted jumps over an unconditional branch instruction.
1477 Anyway, if a relaxation required, user should pass -relax option to the
1480 There are quite a few relaxing opportunities available on the msp430:
1482 ================================================================
1484 1. 3 words -> 1 word
1486 eq == jeq label jne +4; br lab
1487 ne != jne label jeq +4; br lab
1488 lt < jl label jge +4; br lab
1489 ltu < jlo label lhs +4; br lab
1490 ge >= jge label jl +4; br lab
1491 geu >= jhs label jlo +4; br lab
1493 2. 4 words -> 1 word
1495 ltn < jn jn +2; jmp +4; br lab
1497 3. 4 words -> 2 words
1499 gt > jeq +2; jge label jeq +6; jl +4; br label
1500 gtu > jeq +2; jhs label jeq +6; jlo +4; br label
1502 4. 4 words -> 2 words and 2 labels
1504 leu <= jeq label; jlo label jeq +2; jhs +4; br label
1505 le <= jeq label; jl label jeq +2; jge +4; br label
1506 =================================================================
1508 codemap for first cases is (labels masked ):
1509 eq: 0x2002,0x4010,0x0000 -> 0x2400
1510 ne: 0x2402,0x4010,0x0000 -> 0x2000
1511 lt: 0x3402,0x4010,0x0000 -> 0x3800
1512 ltu: 0x2c02,0x4010,0x0000 -> 0x2800
1513 ge: 0x3802,0x4010,0x0000 -> 0x3400
1514 geu: 0x2802,0x4010,0x0000 -> 0x2c00
1517 ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000
1520 gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400
1521 gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00
1524 leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800
1525 le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800
1528 jump: 0x4010,0x0000 -> 0x3c00. */
1530 #define NUMB_RELAX_CODES 12
1531 static struct rcodes_s
1533 int f0, f1; /* From code. */
1534 int t0, t1; /* To code. */
1535 int labels; /* Position of labels: 1 - one label at first
1536 word, 2 - one at second word, 3 - two
1538 int cdx; /* Words to match. */
1539 int bs; /* Shrink bytes. */
1540 int off; /* Offset from old label for new code. */
1541 int ncl; /* New code length. */
1543 {/* lab,cdx,bs,off,ncl */
1544 { 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */
1545 { 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */
1546 { 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */
1547 { 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */
1548 { 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */
1549 { 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */
1550 { 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */
1551 { 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */
1552 { 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */
1553 { 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */
1554 { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */
1555 { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */
1556 { 0, 0, 0, 0, 0, 0, 0, 0, 0}
1559 /* Return TRUE if a symbol exists at the given address. */
1562 msp430_elf_symbol_address_p (bfd * abfd,
1564 Elf_Internal_Sym * isym,
1567 Elf_Internal_Shdr *symtab_hdr;
1568 unsigned int sec_shndx;
1569 Elf_Internal_Sym *isymend;
1570 struct elf_link_hash_entry **sym_hashes;
1571 struct elf_link_hash_entry **end_hashes;
1572 unsigned int symcount;
1574 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1576 /* Examine all the local symbols. */
1577 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1578 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1579 if (isym->st_shndx == sec_shndx && isym->st_value == addr)
1582 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1583 - symtab_hdr->sh_info);
1584 sym_hashes = elf_sym_hashes (abfd);
1585 end_hashes = sym_hashes + symcount;
1586 for (; sym_hashes < end_hashes; sym_hashes++)
1588 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1590 if ((sym_hash->root.type == bfd_link_hash_defined
1591 || sym_hash->root.type == bfd_link_hash_defweak)
1592 && sym_hash->root.u.def.section == sec
1593 && sym_hash->root.u.def.value == addr)
1600 /* Adjust all local symbols defined as '.section + 0xXXXX' (.section has
1601 sec_shndx) referenced from current and other sections. */
1604 msp430_elf_relax_adjust_locals (bfd * abfd, asection * sec, bfd_vma addr,
1605 int count, unsigned int sec_shndx,
1608 Elf_Internal_Shdr *symtab_hdr;
1609 Elf_Internal_Rela *irel;
1610 Elf_Internal_Rela *irelend;
1611 Elf_Internal_Sym *isym;
1613 irel = elf_section_data (sec)->relocs;
1617 irelend = irel + sec->reloc_count;
1618 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1619 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1621 for (;irel < irelend; irel++)
1623 unsigned int sidx = ELF32_R_SYM(irel->r_info);
1624 Elf_Internal_Sym *lsym = isym + sidx;
1626 /* Adjust symbols referenced by .sec+0xXX. */
1627 if (irel->r_addend > addr && irel->r_addend < toaddr
1628 && sidx < symtab_hdr->sh_info
1629 && lsym->st_shndx == sec_shndx)
1630 irel->r_addend -= count;
1636 /* Delete some bytes from a section while relaxing. */
1639 msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr,
1642 Elf_Internal_Shdr *symtab_hdr;
1643 unsigned int sec_shndx;
1645 Elf_Internal_Rela *irel;
1646 Elf_Internal_Rela *irelend;
1648 Elf_Internal_Sym *isym;
1649 Elf_Internal_Sym *isymend;
1650 struct elf_link_hash_entry **sym_hashes;
1651 struct elf_link_hash_entry **end_hashes;
1652 unsigned int symcount;
1655 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1657 contents = elf_section_data (sec)->this_hdr.contents;
1661 irel = elf_section_data (sec)->relocs;
1662 irelend = irel + sec->reloc_count;
1664 /* Actually delete the bytes. */
1665 memmove (contents + addr, contents + addr + count,
1666 (size_t) (toaddr - addr - count));
1669 /* Adjust all the relocs. */
1670 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1671 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1672 for (; irel < irelend; irel++)
1674 /* Get the new reloc address. */
1675 if ((irel->r_offset > addr && irel->r_offset < toaddr))
1676 irel->r_offset -= count;
1679 for (p = abfd->sections; p != NULL; p = p->next)
1680 msp430_elf_relax_adjust_locals (abfd,p,addr,count,sec_shndx,toaddr);
1682 /* Adjust the local symbols defined in this section. */
1683 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1684 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1685 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1689 name = bfd_elf_string_from_elf_section
1690 (abfd, symtab_hdr->sh_link, isym->st_name);
1691 name = (name == NULL || * name == 0) ? bfd_section_name (abfd, sec) : name;
1693 if (isym->st_shndx != sec_shndx)
1696 if (isym->st_value > addr
1697 && (isym->st_value < toaddr
1698 /* We also adjust a symbol at the end of the section if its name is
1699 on the list below. These symbols are used for debug info
1700 generation and they refer to the end of the current section, not
1701 the start of the next section. */
1702 || (isym->st_value == toaddr
1704 && (CONST_STRNEQ (name, ".Letext")
1705 || CONST_STRNEQ (name, ".LFE")))))
1707 if (isym->st_value < addr + count)
1708 isym->st_value = addr;
1710 isym->st_value -= count;
1712 /* Adjust the function symbol's size as well. */
1713 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC
1714 && isym->st_value + isym->st_size > addr
1715 && isym->st_value + isym->st_size < toaddr)
1716 isym->st_size -= count;
1719 /* Now adjust the global symbols defined in this section. */
1720 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1721 - symtab_hdr->sh_info);
1722 sym_hashes = elf_sym_hashes (abfd);
1723 end_hashes = sym_hashes + symcount;
1724 for (; sym_hashes < end_hashes; sym_hashes++)
1726 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1728 if ((sym_hash->root.type == bfd_link_hash_defined
1729 || sym_hash->root.type == bfd_link_hash_defweak)
1730 && sym_hash->root.u.def.section == sec
1731 && sym_hash->root.u.def.value > addr
1732 && sym_hash->root.u.def.value < toaddr)
1734 if (sym_hash->root.u.def.value < addr + count)
1735 sym_hash->root.u.def.value = addr;
1737 sym_hash->root.u.def.value -= count;
1739 /* Adjust the function symbol's size as well. */
1740 else if (sym_hash->root.type == bfd_link_hash_defined
1741 && sym_hash->root.u.def.section == sec
1742 && sym_hash->type == STT_FUNC
1743 && sym_hash->root.u.def.value + sym_hash->size > addr
1744 && sym_hash->root.u.def.value + sym_hash->size < toaddr)
1745 sym_hash->size -= count;
1751 /* Insert two words into a section whilst relaxing. */
1754 msp430_elf_relax_add_two_words (bfd * abfd, asection * sec, bfd_vma addr,
1755 int word1, int word2)
1757 Elf_Internal_Shdr *symtab_hdr;
1758 unsigned int sec_shndx;
1760 Elf_Internal_Rela *irel;
1761 Elf_Internal_Rela *irelend;
1762 Elf_Internal_Sym *isym;
1763 Elf_Internal_Sym *isymend;
1764 struct elf_link_hash_entry **sym_hashes;
1765 struct elf_link_hash_entry **end_hashes;
1766 unsigned int symcount;
1770 contents = elf_section_data (sec)->this_hdr.contents;
1771 sec_end = sec->size;
1773 /* Make space for the new words. */
1774 contents = bfd_realloc (contents, sec_end + 4);
1775 memmove (contents + addr + 4, contents + addr, sec_end - addr);
1777 /* Insert the new words. */
1778 bfd_put_16 (abfd, word1, contents + addr);
1779 bfd_put_16 (abfd, word2, contents + addr + 2);
1781 /* Update the section information. */
1783 elf_section_data (sec)->this_hdr.contents = contents;
1785 /* Adjust all the relocs. */
1786 irel = elf_section_data (sec)->relocs;
1787 irelend = irel + sec->reloc_count;
1789 for (; irel < irelend; irel++)
1790 if ((irel->r_offset >= addr && irel->r_offset < sec_end))
1791 irel->r_offset += 4;
1793 /* Adjust the local symbols defined in this section. */
1794 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1795 for (p = abfd->sections; p != NULL; p = p->next)
1796 msp430_elf_relax_adjust_locals (abfd, p, addr, -4,
1797 sec_shndx, sec_end);
1799 /* Adjust the global symbols affected by the move. */
1800 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1801 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1802 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1803 if (isym->st_shndx == sec_shndx
1804 && isym->st_value >= addr && isym->st_value < sec_end)
1805 isym->st_value += 4;
1807 /* Now adjust the global symbols defined in this section. */
1808 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1809 - symtab_hdr->sh_info);
1810 sym_hashes = elf_sym_hashes (abfd);
1811 end_hashes = sym_hashes + symcount;
1812 for (; sym_hashes < end_hashes; sym_hashes++)
1814 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1816 if ((sym_hash->root.type == bfd_link_hash_defined
1817 || sym_hash->root.type == bfd_link_hash_defweak)
1818 && sym_hash->root.u.def.section == sec
1819 && sym_hash->root.u.def.value >= addr
1820 && sym_hash->root.u.def.value < sec_end)
1821 sym_hash->root.u.def.value += 4;
1828 msp430_elf_relax_section (bfd * abfd, asection * sec,
1829 struct bfd_link_info * link_info,
1830 bfd_boolean * again)
1832 Elf_Internal_Shdr * symtab_hdr;
1833 Elf_Internal_Rela * internal_relocs;
1834 Elf_Internal_Rela * irel;
1835 Elf_Internal_Rela * irelend;
1836 bfd_byte * contents = NULL;
1837 Elf_Internal_Sym * isymbuf = NULL;
1839 /* Assume nothing changes. */
1842 /* We don't have to do anything for a relocatable link, if
1843 this section does not have relocs, or if this is not a
1845 if (bfd_link_relocatable (link_info)
1846 || (sec->flags & SEC_RELOC) == 0
1847 || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
1850 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1852 /* Get a copy of the native relocations. */
1854 _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
1855 if (internal_relocs == NULL)
1858 /* Walk through them looking for relaxing opportunities. */
1859 irelend = internal_relocs + sec->reloc_count;
1861 /* Do code size growing relocs first. */
1862 for (irel = internal_relocs; irel < irelend; irel++)
1866 /* If this isn't something that can be relaxed, then ignore
1868 if (uses_msp430x_relocs (abfd)
1869 && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430X_10_PCREL)
1871 else if (! uses_msp430x_relocs (abfd)
1872 && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_10_PCREL)
1877 /* Get the section contents if we haven't done so already. */
1878 if (contents == NULL)
1880 /* Get cached copy if it exists. */
1881 if (elf_section_data (sec)->this_hdr.contents != NULL)
1882 contents = elf_section_data (sec)->this_hdr.contents;
1883 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
1887 /* Read this BFD's local symbols if we haven't done so already. */
1888 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1890 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1891 if (isymbuf == NULL)
1892 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1893 symtab_hdr->sh_info, 0,
1895 if (isymbuf == NULL)
1899 /* Get the value of the symbol referred to by the reloc. */
1900 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1902 /* A local symbol. */
1903 Elf_Internal_Sym *isym;
1906 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1907 if (isym->st_shndx == SHN_UNDEF)
1908 sym_sec = bfd_und_section_ptr;
1909 else if (isym->st_shndx == SHN_ABS)
1910 sym_sec = bfd_abs_section_ptr;
1911 else if (isym->st_shndx == SHN_COMMON)
1912 sym_sec = bfd_com_section_ptr;
1914 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1915 symval = (isym->st_value
1916 + sym_sec->output_section->vma + sym_sec->output_offset);
1921 struct elf_link_hash_entry *h;
1923 /* An external symbol. */
1924 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1925 h = elf_sym_hashes (abfd)[indx];
1926 BFD_ASSERT (h != NULL);
1928 if (h->root.type != bfd_link_hash_defined
1929 && h->root.type != bfd_link_hash_defweak)
1930 /* This appears to be a reference to an undefined
1931 symbol. Just ignore it--it will be caught by the
1932 regular reloc processing. */
1935 symval = (h->root.u.def.value
1936 + h->root.u.def.section->output_section->vma
1937 + h->root.u.def.section->output_offset);
1940 /* For simplicity of coding, we are going to modify the section
1941 contents, the section relocs, and the BFD symbol table. We
1942 must tell the rest of the code not to free up this
1943 information. It would be possible to instead create a table
1944 of changes which have to be made, as is done in coff-mips.c;
1945 that would be more work, but would require less memory when
1946 the linker is run. */
1948 bfd_signed_vma value = symval;
1951 /* Compute the value that will be relocated. */
1952 value += irel->r_addend;
1953 /* Convert to PC relative. */
1954 value -= (sec->output_section->vma + sec->output_offset);
1955 value -= irel->r_offset;
1960 /* If it is in range then no modifications are needed. */
1961 if (value >= -512 && value <= 511)
1964 /* Get the opcode. */
1965 opcode = bfd_get_16 (abfd, contents + irel->r_offset);
1967 /* Compute the new opcode. We are going to convert:
1973 switch (opcode & 0xfc00)
1975 case 0x3800: opcode = 0x3402; break; /* Jl -> Jge +2 */
1976 case 0x3400: opcode = 0x3802; break; /* Jge -> Jl +2 */
1977 case 0x2c00: opcode = 0x2802; break; /* Jhs -> Jlo +2 */
1978 case 0x2800: opcode = 0x2c02; break; /* Jlo -> Jhs +2 */
1979 case 0x2400: opcode = 0x2002; break; /* Jeq -> Jne +2 */
1980 case 0x2000: opcode = 0x2402; break; /* jne -> Jeq +2 */
1981 case 0x3000: /* jn */
1982 /* There is no direct inverse of the Jn insn.
1983 FIXME: we could do this as:
1990 /* Not a conditional branch instruction. */
1991 /* fprintf (stderr, "unrecog: %x\n", opcode); */
1995 /* Note that we've changed the relocs, section contents, etc. */
1996 elf_section_data (sec)->relocs = internal_relocs;
1997 elf_section_data (sec)->this_hdr.contents = contents;
1998 symtab_hdr->contents = (unsigned char *) isymbuf;
2000 /* Install the new opcode. */
2001 bfd_put_16 (abfd, opcode, contents + irel->r_offset);
2003 /* Insert the new branch instruction. */
2004 if (uses_msp430x_relocs (abfd))
2006 /* Insert an absolute branch (aka MOVA) instruction. */
2007 contents = msp430_elf_relax_add_two_words
2008 (abfd, sec, irel->r_offset + 2, 0x0080, 0x0000);
2010 /* Update the relocation to point to the inserted branch
2011 instruction. Note - we are changing a PC-relative reloc
2012 into an absolute reloc, but this is OK because we have
2013 arranged with the assembler to have the reloc's value be
2014 a (local) symbol, not a section+offset value. */
2015 irel->r_offset += 2;
2016 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2017 R_MSP430X_ABS20_ADR_SRC);
2021 contents = msp430_elf_relax_add_two_words
2022 (abfd, sec, irel->r_offset + 2, 0x4030, 0x0000);
2024 /* See comment above about converting a 10-bit PC-rel
2025 relocation into a 16-bit absolute relocation. */
2026 irel->r_offset += 4;
2027 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2031 /* Growing the section may mean that other
2032 conditional branches need to be fixed. */
2036 for (irel = internal_relocs; irel < irelend; irel++)
2040 /* Get the section contents if we haven't done so already. */
2041 if (contents == NULL)
2043 /* Get cached copy if it exists. */
2044 if (elf_section_data (sec)->this_hdr.contents != NULL)
2045 contents = elf_section_data (sec)->this_hdr.contents;
2046 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
2050 /* Read this BFD's local symbols if we haven't done so already. */
2051 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2053 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2054 if (isymbuf == NULL)
2055 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2056 symtab_hdr->sh_info, 0,
2058 if (isymbuf == NULL)
2062 /* Get the value of the symbol referred to by the reloc. */
2063 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2065 /* A local symbol. */
2066 Elf_Internal_Sym *isym;
2069 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2070 if (isym->st_shndx == SHN_UNDEF)
2071 sym_sec = bfd_und_section_ptr;
2072 else if (isym->st_shndx == SHN_ABS)
2073 sym_sec = bfd_abs_section_ptr;
2074 else if (isym->st_shndx == SHN_COMMON)
2075 sym_sec = bfd_com_section_ptr;
2077 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2078 symval = (isym->st_value
2079 + sym_sec->output_section->vma + sym_sec->output_offset);
2084 struct elf_link_hash_entry *h;
2086 /* An external symbol. */
2087 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2088 h = elf_sym_hashes (abfd)[indx];
2089 BFD_ASSERT (h != NULL);
2091 if (h->root.type != bfd_link_hash_defined
2092 && h->root.type != bfd_link_hash_defweak)
2093 /* This appears to be a reference to an undefined
2094 symbol. Just ignore it--it will be caught by the
2095 regular reloc processing. */
2098 symval = (h->root.u.def.value
2099 + h->root.u.def.section->output_section->vma
2100 + h->root.u.def.section->output_offset);
2103 /* For simplicity of coding, we are going to modify the section
2104 contents, the section relocs, and the BFD symbol table. We
2105 must tell the rest of the code not to free up this
2106 information. It would be possible to instead create a table
2107 of changes which have to be made, as is done in coff-mips.c;
2108 that would be more work, but would require less memory when
2109 the linker is run. */
2111 /* Try to turn a 16bit pc-relative branch into a 10bit pc-relative
2113 /* Paranoia? paranoia... */
2114 if (! uses_msp430x_relocs (abfd)
2115 && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL)
2117 bfd_vma value = symval;
2119 /* Deal with pc-relative gunk. */
2120 value -= (sec->output_section->vma + sec->output_offset);
2121 value -= irel->r_offset;
2122 value += irel->r_addend;
2124 /* See if the value will fit in 10 bits, note the high value is
2125 1016 as the target will be two bytes closer if we are
2127 if ((long) value < 1016 && (long) value > -1016)
2129 int code0 = 0, code1 = 0, code2 = 0;
2131 struct rcodes_s *rx;
2133 /* Get the opcode. */
2134 if (irel->r_offset >= 6)
2135 code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6);
2137 if (irel->r_offset >= 4)
2138 code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
2140 code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
2142 if (code2 != 0x4010)
2145 /* Check r4 and r3. */
2146 for (i = NUMB_RELAX_CODES - 1; i >= 0; i--)
2149 if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1)
2151 else if (rx->cdx == 1 && rx->f1 == code1)
2153 else if (rx->cdx == 0) /* This is an unconditional jump. */
2158 .Label0: ; we do not care about this label
2160 .Label1: ; make sure there is no label here
2162 .Label2: ; make sure there is no label here
2165 So, if there is .Label1 or .Label2 we cannot relax this code.
2166 This actually should not happen, cause for relaxable
2167 instructions we use RL_PCREL reloc instead of 16_PCREL.
2168 Will change this in the future. */
2171 && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
2172 irel->r_offset - 2))
2175 && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
2176 irel->r_offset - 4))
2179 /* Note that we've changed the relocs, section contents, etc. */
2180 elf_section_data (sec)->relocs = internal_relocs;
2181 elf_section_data (sec)->this_hdr.contents = contents;
2182 symtab_hdr->contents = (unsigned char *) isymbuf;
2184 /* Fix the relocation's type. */
2185 if (uses_msp430x_relocs (abfd))
2187 if (rx->labels == 3) /* Handle special cases. */
2188 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2189 R_MSP430X_2X_PCREL);
2191 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2192 R_MSP430X_10_PCREL);
2196 if (rx->labels == 3) /* Handle special cases. */
2197 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2200 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2204 /* Fix the opcode right way. */
2205 bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off);
2207 bfd_put_16 (abfd, rx->t1,
2208 contents + irel->r_offset - rx->off + 2);
2211 if (!msp430_elf_relax_delete_bytes (abfd, sec,
2212 irel->r_offset - rx->off +
2216 /* Handle unconditional jumps. */
2218 irel->r_offset -= 2;
2220 /* That will change things, so, we should relax again.
2221 Note that this is not required, and it may be slow. */
2226 /* Try to turn a 16-bit absolute branch into a 10-bit pc-relative
2228 if (uses_msp430x_relocs (abfd)
2229 && ELF32_R_TYPE (irel->r_info) == R_MSP430X_ABS16)
2231 bfd_vma value = symval;
2233 value -= (sec->output_section->vma + sec->output_offset);
2234 value -= irel->r_offset;
2235 value += irel->r_addend;
2237 /* See if the value will fit in 10 bits, note the high value is
2238 1016 as the target will be two bytes closer if we are
2240 if ((long) value < 1016 && (long) value > -1016)
2244 /* Get the opcode. */
2245 code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
2246 if (code2 != 0x4030)
2248 /* FIXME: check r4 and r3 ? */
2249 /* FIXME: Handle 0x4010 as well ? */
2251 /* Note that we've changed the relocs, section contents, etc. */
2252 elf_section_data (sec)->relocs = internal_relocs;
2253 elf_section_data (sec)->this_hdr.contents = contents;
2254 symtab_hdr->contents = (unsigned char *) isymbuf;
2256 /* Fix the relocation's type. */
2257 if (uses_msp430x_relocs (abfd))
2259 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2260 R_MSP430X_10_PCREL);
2264 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2268 /* Fix the opcode right way. */
2269 bfd_put_16 (abfd, 0x3c00, contents + irel->r_offset - 2);
2270 irel->r_offset -= 2;
2273 if (!msp430_elf_relax_delete_bytes (abfd, sec,
2274 irel->r_offset + 2, 2))
2277 /* That will change things, so, we should relax again.
2278 Note that this is not required, and it may be slow. */
2284 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2286 if (!link_info->keep_memory)
2290 /* Cache the symbols for elf_link_input_bfd. */
2291 symtab_hdr->contents = (unsigned char *) isymbuf;
2295 if (contents != NULL
2296 && elf_section_data (sec)->this_hdr.contents != contents)
2298 if (!link_info->keep_memory)
2302 /* Cache the section contents for elf_link_input_bfd. */
2303 elf_section_data (sec)->this_hdr.contents = contents;
2307 if (internal_relocs != NULL
2308 && elf_section_data (sec)->relocs != internal_relocs)
2309 free (internal_relocs);
2314 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2316 if (contents != NULL
2317 && elf_section_data (sec)->this_hdr.contents != contents)
2319 if (internal_relocs != NULL
2320 && elf_section_data (sec)->relocs != internal_relocs)
2321 free (internal_relocs);
2326 /* Handle an MSP430 specific section when reading an object file.
2327 This is called when bfd_section_from_shdr finds a section with
2331 elf32_msp430_section_from_shdr (bfd *abfd,
2332 Elf_Internal_Shdr * hdr,
2336 switch (hdr->sh_type)
2338 case SHT_MSP430_SEC_FLAGS:
2339 case SHT_MSP430_SYM_ALIASES:
2340 case SHT_MSP430_ATTRIBUTES:
2341 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2348 elf32_msp430_obj_attrs_handle_unknown (bfd *abfd, int tag)
2351 (_("Warning: %B: Unknown MSPABI object attribute %d"),
2356 /* Determine whether an object attribute tag takes an integer, a
2360 elf32_msp430_obj_attrs_arg_type (int tag)
2362 if (tag == Tag_compatibility)
2363 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
2366 return ATTR_TYPE_FLAG_INT_VAL;
2368 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
2371 static inline const char *
2376 case 1: return "MSP430";
2377 case 2: return "MSP430X";
2378 default: return "unknown";
2382 static inline const char *
2383 code_model (int model)
2387 case 1: return "small";
2388 case 2: return "large";
2389 default: return "unknown";
2393 static inline const char *
2394 data_model (int model)
2398 case 1: return "small";
2399 case 2: return "large";
2400 case 3: return "restricted large";
2401 default: return "unknown";
2405 /* Merge MSPABI object attributes from IBFD into OBFD.
2406 Raise an error if there are conflicting attributes. */
2409 elf32_msp430_merge_mspabi_attributes (bfd *ibfd, bfd *obfd)
2411 obj_attribute *in_attr;
2412 obj_attribute *out_attr;
2413 bfd_boolean result = TRUE;
2414 static bfd * first_input_bfd = NULL;
2416 /* Skip linker created files. */
2417 if (ibfd->flags & BFD_LINKER_CREATED)
2420 /* If this is the first real object just copy the attributes. */
2421 if (!elf_known_obj_attributes_proc (obfd)[0].i)
2423 _bfd_elf_copy_obj_attributes (ibfd, obfd);
2425 out_attr = elf_known_obj_attributes_proc (obfd);
2427 /* Use the Tag_null value to indicate that
2428 the attributes have been initialized. */
2431 first_input_bfd = ibfd;
2435 in_attr = elf_known_obj_attributes_proc (ibfd);
2436 out_attr = elf_known_obj_attributes_proc (obfd);
2438 /* The ISAs must be the same. */
2439 if (in_attr[OFBA_MSPABI_Tag_ISA].i != out_attr[OFBA_MSPABI_Tag_ISA].i)
2442 (_("error: %B uses %s instructions but %B uses %s"),
2443 ibfd, first_input_bfd,
2444 isa_type (in_attr[OFBA_MSPABI_Tag_ISA].i),
2445 isa_type (out_attr[OFBA_MSPABI_Tag_ISA].i));
2449 /* The code models must be the same. */
2450 if (in_attr[OFBA_MSPABI_Tag_Code_Model].i !=
2451 out_attr[OFBA_MSPABI_Tag_Code_Model].i)
2454 (_("error: %B uses the %s code model whereas %B uses the %s code model"),
2455 ibfd, first_input_bfd,
2456 code_model (in_attr[OFBA_MSPABI_Tag_Code_Model].i),
2457 code_model (out_attr[OFBA_MSPABI_Tag_Code_Model].i));
2461 /* The large code model is only supported by the MSP430X. */
2462 if (in_attr[OFBA_MSPABI_Tag_Code_Model].i == 2
2463 && out_attr[OFBA_MSPABI_Tag_ISA].i != 2)
2466 (_("error: %B uses the large code model but %B uses MSP430 instructions"),
2467 ibfd, first_input_bfd);
2471 /* The data models must be the same. */
2472 if (in_attr[OFBA_MSPABI_Tag_Data_Model].i !=
2473 out_attr[OFBA_MSPABI_Tag_Data_Model].i)
2476 (_("error: %B uses the %s data model whereas %B uses the %s data model"),
2477 ibfd, first_input_bfd,
2478 data_model (in_attr[OFBA_MSPABI_Tag_Data_Model].i),
2479 data_model (out_attr[OFBA_MSPABI_Tag_Data_Model].i));
2483 /* The small code model requires the use of the small data model. */
2484 if (in_attr[OFBA_MSPABI_Tag_Code_Model].i == 1
2485 && out_attr[OFBA_MSPABI_Tag_Data_Model].i != 1)
2488 (_("error: %B uses the small code model but %B uses the %s data model"),
2489 ibfd, first_input_bfd,
2490 data_model (out_attr[OFBA_MSPABI_Tag_Data_Model].i));
2494 /* The large data models are only supported by the MSP430X. */
2495 if (in_attr[OFBA_MSPABI_Tag_Data_Model].i > 1
2496 && out_attr[OFBA_MSPABI_Tag_ISA].i != 2)
2499 (_("error: %B uses the %s data model but %B only uses MSP430 instructions"),
2500 ibfd, first_input_bfd,
2501 data_model (in_attr[OFBA_MSPABI_Tag_Data_Model].i));
2508 /* Merge backend specific data from an object file to the output
2509 object file when linking. */
2512 elf32_msp430_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
2514 /* Make sure that the machine number reflects the most
2515 advanced version of the MSP architecture required. */
2516 #define max(a,b) ((a) > (b) ? (a) : (b))
2517 if (bfd_get_mach (ibfd) != bfd_get_mach (obfd))
2518 bfd_default_set_arch_mach (obfd, bfd_get_arch (obfd),
2519 max (bfd_get_mach (ibfd), bfd_get_mach (obfd)));
2522 return elf32_msp430_merge_mspabi_attributes (ibfd, obfd);
2526 msp430_elf_is_target_special_symbol (bfd *abfd, asymbol *sym)
2528 return _bfd_elf_is_local_label_name (abfd, sym->name);
2532 uses_large_model (bfd *abfd)
2534 obj_attribute * attr;
2536 if (abfd->flags & BFD_LINKER_CREATED)
2539 attr = elf_known_obj_attributes_proc (abfd);
2543 return attr[OFBA_MSPABI_Tag_Code_Model].i == 2;
2547 elf32_msp430_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED)
2549 return uses_large_model (abfd) ? 4 : 2;
2552 /* This is gross. The MSP430 EABI says that (sec 11.5):
2554 "An implementation may choose to use Rel or Rela
2555 type relocations for other relocations."
2557 But it also says that:
2559 "Certain relocations are identified as Rela only. [snip]
2560 Where Rela is specified, an implementation must honor
2563 There is one relocation marked as requiring RELA - R_MSP430_ABS_HI16 - but
2564 to keep things simple we choose to use RELA relocations throughout. The
2565 problem is that the TI compiler generates REL relocations, so we have to
2566 be able to accept those as well. */
2568 #define elf_backend_may_use_rel_p 1
2569 #define elf_backend_may_use_rela_p 1
2570 #define elf_backend_default_use_rela_p 1
2572 #undef elf_backend_obj_attrs_vendor
2573 #define elf_backend_obj_attrs_vendor "mspabi"
2574 #undef elf_backend_obj_attrs_section
2575 #define elf_backend_obj_attrs_section ".MSP430.attributes"
2576 #undef elf_backend_obj_attrs_section_type
2577 #define elf_backend_obj_attrs_section_type SHT_MSP430_ATTRIBUTES
2578 #define elf_backend_section_from_shdr elf32_msp430_section_from_shdr
2579 #define elf_backend_obj_attrs_handle_unknown elf32_msp430_obj_attrs_handle_unknown
2580 #undef elf_backend_obj_attrs_arg_type
2581 #define elf_backend_obj_attrs_arg_type elf32_msp430_obj_attrs_arg_type
2582 #define bfd_elf32_bfd_merge_private_bfd_data elf32_msp430_merge_private_bfd_data
2583 #define elf_backend_eh_frame_address_size elf32_msp430_eh_frame_address_size
2585 #define ELF_ARCH bfd_arch_msp430
2586 #define ELF_MACHINE_CODE EM_MSP430
2587 #define ELF_MACHINE_ALT1 EM_MSP430_OLD
2588 #define ELF_MAXPAGESIZE 4
2589 #define ELF_OSABI ELFOSABI_STANDALONE
2591 #define TARGET_LITTLE_SYM msp430_elf32_vec
2592 #define TARGET_LITTLE_NAME "elf32-msp430"
2594 #define elf_info_to_howto msp430_info_to_howto_rela
2595 #define elf_info_to_howto_rel NULL
2596 #define elf_backend_relocate_section elf32_msp430_relocate_section
2597 #define elf_backend_check_relocs elf32_msp430_check_relocs
2598 #define elf_backend_can_gc_sections 1
2599 #define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing
2600 #define elf_backend_object_p elf32_msp430_object_p
2601 #define bfd_elf32_bfd_relax_section msp430_elf_relax_section
2602 #define bfd_elf32_bfd_is_target_special_symbol msp430_elf_is_target_special_symbol
2605 #define elf32_bed elf32_msp430_bed
2607 #include "elf32-target.h"
2609 /* The TI compiler sets the OSABI field to ELFOSABI_NONE. */
2610 #undef TARGET_LITTLE_SYM
2611 #define TARGET_LITTLE_SYM msp430_elf32_ti_vec
2614 #define elf32_bed elf32_msp430_ti_bed
2617 #define ELF_OSABI ELFOSABI_NONE
2619 static const struct bfd_elf_special_section msp430_ti_elf_special_sections[] =
2621 /* prefix, prefix_length, suffix_len, type, attributes. */
2622 { STRING_COMMA_LEN (".TI.symbol.alias"), 0, SHT_MSP430_SYM_ALIASES, 0 },
2623 { STRING_COMMA_LEN (".TI.section.flags"), 0, SHT_MSP430_SEC_FLAGS, 0 },
2624 { STRING_COMMA_LEN ("_TI_build_attrib"), 0, SHT_MSP430_ATTRIBUTES, 0 },
2625 { NULL, 0, 0, 0, 0 }
2628 #undef elf_backend_special_sections
2629 #define elf_backend_special_sections msp430_ti_elf_special_sections
2631 #include "elf32-target.h"