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 r = info->callbacks->reloc_overflow
1345 (info, (h ? &h->root : NULL), name, howto->name,
1346 (bfd_vma) 0, input_bfd, input_section,
1350 case bfd_reloc_undefined:
1351 r = info->callbacks->undefined_symbol
1352 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1355 case bfd_reloc_outofrange:
1356 msg = _("internal error: branch/jump to an odd address detected");
1359 case bfd_reloc_notsupported:
1360 msg = _("internal error: unsupported relocation error");
1363 case bfd_reloc_dangerous:
1364 msg = _("internal error: dangerous relocation");
1368 msg = _("internal error: unknown error");
1373 r = info->callbacks->warning
1374 (info, msg, name, input_bfd, input_section, rel->r_offset);
1385 /* The final processing done just before writing out a MSP430 ELF object
1386 file. This gets the MSP430 architecture right based on the machine
1390 bfd_elf_msp430_final_write_processing (bfd * abfd,
1391 bfd_boolean linker ATTRIBUTE_UNUSED)
1395 switch (bfd_get_mach (abfd))
1398 case bfd_mach_msp110: val = E_MSP430_MACH_MSP430x11x1; break;
1399 case bfd_mach_msp11: val = E_MSP430_MACH_MSP430x11; break;
1400 case bfd_mach_msp12: val = E_MSP430_MACH_MSP430x12; break;
1401 case bfd_mach_msp13: val = E_MSP430_MACH_MSP430x13; break;
1402 case bfd_mach_msp14: val = E_MSP430_MACH_MSP430x14; break;
1403 case bfd_mach_msp15: val = E_MSP430_MACH_MSP430x15; break;
1404 case bfd_mach_msp16: val = E_MSP430_MACH_MSP430x16; break;
1405 case bfd_mach_msp31: val = E_MSP430_MACH_MSP430x31; break;
1406 case bfd_mach_msp32: val = E_MSP430_MACH_MSP430x32; break;
1407 case bfd_mach_msp33: val = E_MSP430_MACH_MSP430x33; break;
1408 case bfd_mach_msp41: val = E_MSP430_MACH_MSP430x41; break;
1409 case bfd_mach_msp42: val = E_MSP430_MACH_MSP430x42; break;
1410 case bfd_mach_msp43: val = E_MSP430_MACH_MSP430x43; break;
1411 case bfd_mach_msp44: val = E_MSP430_MACH_MSP430x44; break;
1412 case bfd_mach_msp20: val = E_MSP430_MACH_MSP430x20; break;
1413 case bfd_mach_msp22: val = E_MSP430_MACH_MSP430x22; break;
1414 case bfd_mach_msp23: val = E_MSP430_MACH_MSP430x23; break;
1415 case bfd_mach_msp24: val = E_MSP430_MACH_MSP430x24; break;
1416 case bfd_mach_msp26: val = E_MSP430_MACH_MSP430x26; break;
1417 case bfd_mach_msp46: val = E_MSP430_MACH_MSP430x46; break;
1418 case bfd_mach_msp47: val = E_MSP430_MACH_MSP430x47; break;
1419 case bfd_mach_msp54: val = E_MSP430_MACH_MSP430x54; break;
1420 case bfd_mach_msp430x: val = E_MSP430_MACH_MSP430X; break;
1423 elf_elfheader (abfd)->e_machine = EM_MSP430;
1424 elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH;
1425 elf_elfheader (abfd)->e_flags |= val;
1428 /* Set the right machine number. */
1431 elf32_msp430_object_p (bfd * abfd)
1433 int e_set = bfd_mach_msp14;
1435 if (elf_elfheader (abfd)->e_machine == EM_MSP430
1436 || elf_elfheader (abfd)->e_machine == EM_MSP430_OLD)
1438 int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH;
1443 case E_MSP430_MACH_MSP430x11: e_set = bfd_mach_msp11; break;
1444 case E_MSP430_MACH_MSP430x11x1: e_set = bfd_mach_msp110; break;
1445 case E_MSP430_MACH_MSP430x12: e_set = bfd_mach_msp12; break;
1446 case E_MSP430_MACH_MSP430x13: e_set = bfd_mach_msp13; break;
1447 case E_MSP430_MACH_MSP430x14: e_set = bfd_mach_msp14; break;
1448 case E_MSP430_MACH_MSP430x15: e_set = bfd_mach_msp15; break;
1449 case E_MSP430_MACH_MSP430x16: e_set = bfd_mach_msp16; break;
1450 case E_MSP430_MACH_MSP430x31: e_set = bfd_mach_msp31; break;
1451 case E_MSP430_MACH_MSP430x32: e_set = bfd_mach_msp32; break;
1452 case E_MSP430_MACH_MSP430x33: e_set = bfd_mach_msp33; break;
1453 case E_MSP430_MACH_MSP430x41: e_set = bfd_mach_msp41; break;
1454 case E_MSP430_MACH_MSP430x42: e_set = bfd_mach_msp42; break;
1455 case E_MSP430_MACH_MSP430x43: e_set = bfd_mach_msp43; break;
1456 case E_MSP430_MACH_MSP430x44: e_set = bfd_mach_msp44; break;
1457 case E_MSP430_MACH_MSP430x20: e_set = bfd_mach_msp20; break;
1458 case E_MSP430_MACH_MSP430x22: e_set = bfd_mach_msp22; break;
1459 case E_MSP430_MACH_MSP430x23: e_set = bfd_mach_msp23; break;
1460 case E_MSP430_MACH_MSP430x24: e_set = bfd_mach_msp24; break;
1461 case E_MSP430_MACH_MSP430x26: e_set = bfd_mach_msp26; break;
1462 case E_MSP430_MACH_MSP430x46: e_set = bfd_mach_msp46; break;
1463 case E_MSP430_MACH_MSP430x47: e_set = bfd_mach_msp47; break;
1464 case E_MSP430_MACH_MSP430x54: e_set = bfd_mach_msp54; break;
1465 case E_MSP430_MACH_MSP430X: e_set = bfd_mach_msp430x; break;
1469 return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set);
1472 /* These functions handle relaxing for the msp430.
1473 Relaxation required only in two cases:
1474 - Bad hand coding like jumps from one section to another or
1476 - Sibling calls. This will affect only 'jump label' polymorph. Without
1477 relaxing this enlarges code by 2 bytes. Sibcalls implemented but
1478 do not work in gcc's port by the reason I do not know.
1479 - To convert out of range conditional jump instructions (found inside
1480 a function) into inverted jumps over an unconditional branch instruction.
1481 Anyway, if a relaxation required, user should pass -relax option to the
1484 There are quite a few relaxing opportunities available on the msp430:
1486 ================================================================
1488 1. 3 words -> 1 word
1490 eq == jeq label jne +4; br lab
1491 ne != jne label jeq +4; br lab
1492 lt < jl label jge +4; br lab
1493 ltu < jlo label lhs +4; br lab
1494 ge >= jge label jl +4; br lab
1495 geu >= jhs label jlo +4; br lab
1497 2. 4 words -> 1 word
1499 ltn < jn jn +2; jmp +4; br lab
1501 3. 4 words -> 2 words
1503 gt > jeq +2; jge label jeq +6; jl +4; br label
1504 gtu > jeq +2; jhs label jeq +6; jlo +4; br label
1506 4. 4 words -> 2 words and 2 labels
1508 leu <= jeq label; jlo label jeq +2; jhs +4; br label
1509 le <= jeq label; jl label jeq +2; jge +4; br label
1510 =================================================================
1512 codemap for first cases is (labels masked ):
1513 eq: 0x2002,0x4010,0x0000 -> 0x2400
1514 ne: 0x2402,0x4010,0x0000 -> 0x2000
1515 lt: 0x3402,0x4010,0x0000 -> 0x3800
1516 ltu: 0x2c02,0x4010,0x0000 -> 0x2800
1517 ge: 0x3802,0x4010,0x0000 -> 0x3400
1518 geu: 0x2802,0x4010,0x0000 -> 0x2c00
1521 ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000
1524 gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400
1525 gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00
1528 leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800
1529 le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800
1532 jump: 0x4010,0x0000 -> 0x3c00. */
1534 #define NUMB_RELAX_CODES 12
1535 static struct rcodes_s
1537 int f0, f1; /* From code. */
1538 int t0, t1; /* To code. */
1539 int labels; /* Position of labels: 1 - one label at first
1540 word, 2 - one at second word, 3 - two
1542 int cdx; /* Words to match. */
1543 int bs; /* Shrink bytes. */
1544 int off; /* Offset from old label for new code. */
1545 int ncl; /* New code length. */
1547 {/* lab,cdx,bs,off,ncl */
1548 { 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */
1549 { 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */
1550 { 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */
1551 { 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */
1552 { 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */
1553 { 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */
1554 { 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */
1555 { 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */
1556 { 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */
1557 { 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */
1558 { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */
1559 { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */
1560 { 0, 0, 0, 0, 0, 0, 0, 0, 0}
1563 /* Return TRUE if a symbol exists at the given address. */
1566 msp430_elf_symbol_address_p (bfd * abfd,
1568 Elf_Internal_Sym * isym,
1571 Elf_Internal_Shdr *symtab_hdr;
1572 unsigned int sec_shndx;
1573 Elf_Internal_Sym *isymend;
1574 struct elf_link_hash_entry **sym_hashes;
1575 struct elf_link_hash_entry **end_hashes;
1576 unsigned int symcount;
1578 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1580 /* Examine all the local symbols. */
1581 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1582 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1583 if (isym->st_shndx == sec_shndx && isym->st_value == addr)
1586 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1587 - symtab_hdr->sh_info);
1588 sym_hashes = elf_sym_hashes (abfd);
1589 end_hashes = sym_hashes + symcount;
1590 for (; sym_hashes < end_hashes; sym_hashes++)
1592 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1594 if ((sym_hash->root.type == bfd_link_hash_defined
1595 || sym_hash->root.type == bfd_link_hash_defweak)
1596 && sym_hash->root.u.def.section == sec
1597 && sym_hash->root.u.def.value == addr)
1604 /* Adjust all local symbols defined as '.section + 0xXXXX' (.section has
1605 sec_shndx) referenced from current and other sections. */
1608 msp430_elf_relax_adjust_locals (bfd * abfd, asection * sec, bfd_vma addr,
1609 int count, unsigned int sec_shndx,
1612 Elf_Internal_Shdr *symtab_hdr;
1613 Elf_Internal_Rela *irel;
1614 Elf_Internal_Rela *irelend;
1615 Elf_Internal_Sym *isym;
1617 irel = elf_section_data (sec)->relocs;
1621 irelend = irel + sec->reloc_count;
1622 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1623 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1625 for (;irel < irelend; irel++)
1627 unsigned int sidx = ELF32_R_SYM(irel->r_info);
1628 Elf_Internal_Sym *lsym = isym + sidx;
1630 /* Adjust symbols referenced by .sec+0xXX. */
1631 if (irel->r_addend > addr && irel->r_addend < toaddr
1632 && sidx < symtab_hdr->sh_info
1633 && lsym->st_shndx == sec_shndx)
1634 irel->r_addend -= count;
1640 /* Delete some bytes from a section while relaxing. */
1643 msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr,
1646 Elf_Internal_Shdr *symtab_hdr;
1647 unsigned int sec_shndx;
1649 Elf_Internal_Rela *irel;
1650 Elf_Internal_Rela *irelend;
1652 Elf_Internal_Sym *isym;
1653 Elf_Internal_Sym *isymend;
1654 struct elf_link_hash_entry **sym_hashes;
1655 struct elf_link_hash_entry **end_hashes;
1656 unsigned int symcount;
1659 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1661 contents = elf_section_data (sec)->this_hdr.contents;
1665 irel = elf_section_data (sec)->relocs;
1666 irelend = irel + sec->reloc_count;
1668 /* Actually delete the bytes. */
1669 memmove (contents + addr, contents + addr + count,
1670 (size_t) (toaddr - addr - count));
1673 /* Adjust all the relocs. */
1674 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1675 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1676 for (; irel < irelend; irel++)
1678 /* Get the new reloc address. */
1679 if ((irel->r_offset > addr && irel->r_offset < toaddr))
1680 irel->r_offset -= count;
1683 for (p = abfd->sections; p != NULL; p = p->next)
1684 msp430_elf_relax_adjust_locals (abfd,p,addr,count,sec_shndx,toaddr);
1686 /* Adjust the local symbols defined in this section. */
1687 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1688 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1689 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1693 name = bfd_elf_string_from_elf_section
1694 (abfd, symtab_hdr->sh_link, isym->st_name);
1695 name = (name == NULL || * name == 0) ? bfd_section_name (abfd, sec) : name;
1697 if (isym->st_shndx != sec_shndx)
1700 if (isym->st_value > addr
1701 && (isym->st_value < toaddr
1702 /* We also adjust a symbol at the end of the section if its name is
1703 on the list below. These symbols are used for debug info
1704 generation and they refer to the end of the current section, not
1705 the start of the next section. */
1706 || (isym->st_value == toaddr
1708 && (CONST_STRNEQ (name, ".Letext")
1709 || CONST_STRNEQ (name, ".LFE")))))
1711 if (isym->st_value < addr + count)
1712 isym->st_value = addr;
1714 isym->st_value -= count;
1716 /* Adjust the function symbol's size as well. */
1717 else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC
1718 && isym->st_value + isym->st_size > addr
1719 && isym->st_value + isym->st_size < toaddr)
1720 isym->st_size -= count;
1723 /* Now adjust the global symbols defined in this section. */
1724 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1725 - symtab_hdr->sh_info);
1726 sym_hashes = elf_sym_hashes (abfd);
1727 end_hashes = sym_hashes + symcount;
1728 for (; sym_hashes < end_hashes; sym_hashes++)
1730 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1732 if ((sym_hash->root.type == bfd_link_hash_defined
1733 || sym_hash->root.type == bfd_link_hash_defweak)
1734 && sym_hash->root.u.def.section == sec
1735 && sym_hash->root.u.def.value > addr
1736 && sym_hash->root.u.def.value < toaddr)
1738 if (sym_hash->root.u.def.value < addr + count)
1739 sym_hash->root.u.def.value = addr;
1741 sym_hash->root.u.def.value -= count;
1743 /* Adjust the function symbol's size as well. */
1744 else if (sym_hash->root.type == bfd_link_hash_defined
1745 && sym_hash->root.u.def.section == sec
1746 && sym_hash->type == STT_FUNC
1747 && sym_hash->root.u.def.value + sym_hash->size > addr
1748 && sym_hash->root.u.def.value + sym_hash->size < toaddr)
1749 sym_hash->size -= count;
1755 /* Insert two words into a section whilst relaxing. */
1758 msp430_elf_relax_add_two_words (bfd * abfd, asection * sec, bfd_vma addr,
1759 int word1, int word2)
1761 Elf_Internal_Shdr *symtab_hdr;
1762 unsigned int sec_shndx;
1764 Elf_Internal_Rela *irel;
1765 Elf_Internal_Rela *irelend;
1766 Elf_Internal_Sym *isym;
1767 Elf_Internal_Sym *isymend;
1768 struct elf_link_hash_entry **sym_hashes;
1769 struct elf_link_hash_entry **end_hashes;
1770 unsigned int symcount;
1774 contents = elf_section_data (sec)->this_hdr.contents;
1775 sec_end = sec->size;
1777 /* Make space for the new words. */
1778 contents = bfd_realloc (contents, sec_end + 4);
1779 memmove (contents + addr + 4, contents + addr, sec_end - addr);
1781 /* Insert the new words. */
1782 bfd_put_16 (abfd, word1, contents + addr);
1783 bfd_put_16 (abfd, word2, contents + addr + 2);
1785 /* Update the section information. */
1787 elf_section_data (sec)->this_hdr.contents = contents;
1789 /* Adjust all the relocs. */
1790 irel = elf_section_data (sec)->relocs;
1791 irelend = irel + sec->reloc_count;
1793 for (; irel < irelend; irel++)
1794 if ((irel->r_offset >= addr && irel->r_offset < sec_end))
1795 irel->r_offset += 4;
1797 /* Adjust the local symbols defined in this section. */
1798 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1799 for (p = abfd->sections; p != NULL; p = p->next)
1800 msp430_elf_relax_adjust_locals (abfd, p, addr, -4,
1801 sec_shndx, sec_end);
1803 /* Adjust the global symbols affected by the move. */
1804 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1805 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1806 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1807 if (isym->st_shndx == sec_shndx
1808 && isym->st_value >= addr && isym->st_value < sec_end)
1809 isym->st_value += 4;
1811 /* Now adjust the global symbols defined in this section. */
1812 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1813 - symtab_hdr->sh_info);
1814 sym_hashes = elf_sym_hashes (abfd);
1815 end_hashes = sym_hashes + symcount;
1816 for (; sym_hashes < end_hashes; sym_hashes++)
1818 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1820 if ((sym_hash->root.type == bfd_link_hash_defined
1821 || sym_hash->root.type == bfd_link_hash_defweak)
1822 && sym_hash->root.u.def.section == sec
1823 && sym_hash->root.u.def.value >= addr
1824 && sym_hash->root.u.def.value < sec_end)
1825 sym_hash->root.u.def.value += 4;
1832 msp430_elf_relax_section (bfd * abfd, asection * sec,
1833 struct bfd_link_info * link_info,
1834 bfd_boolean * again)
1836 Elf_Internal_Shdr * symtab_hdr;
1837 Elf_Internal_Rela * internal_relocs;
1838 Elf_Internal_Rela * irel;
1839 Elf_Internal_Rela * irelend;
1840 bfd_byte * contents = NULL;
1841 Elf_Internal_Sym * isymbuf = NULL;
1843 /* Assume nothing changes. */
1846 /* We don't have to do anything for a relocatable link, if
1847 this section does not have relocs, or if this is not a
1849 if (bfd_link_relocatable (link_info)
1850 || (sec->flags & SEC_RELOC) == 0
1851 || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
1854 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
1856 /* Get a copy of the native relocations. */
1858 _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
1859 if (internal_relocs == NULL)
1862 /* Walk through them looking for relaxing opportunities. */
1863 irelend = internal_relocs + sec->reloc_count;
1865 /* Do code size growing relocs first. */
1866 for (irel = internal_relocs; irel < irelend; irel++)
1870 /* If this isn't something that can be relaxed, then ignore
1872 if (uses_msp430x_relocs (abfd)
1873 && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430X_10_PCREL)
1875 else if (! uses_msp430x_relocs (abfd)
1876 && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_10_PCREL)
1881 /* Get the section contents if we haven't done so already. */
1882 if (contents == NULL)
1884 /* Get cached copy if it exists. */
1885 if (elf_section_data (sec)->this_hdr.contents != NULL)
1886 contents = elf_section_data (sec)->this_hdr.contents;
1887 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
1891 /* Read this BFD's local symbols if we haven't done so already. */
1892 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1894 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1895 if (isymbuf == NULL)
1896 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1897 symtab_hdr->sh_info, 0,
1899 if (isymbuf == NULL)
1903 /* Get the value of the symbol referred to by the reloc. */
1904 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1906 /* A local symbol. */
1907 Elf_Internal_Sym *isym;
1910 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1911 if (isym->st_shndx == SHN_UNDEF)
1912 sym_sec = bfd_und_section_ptr;
1913 else if (isym->st_shndx == SHN_ABS)
1914 sym_sec = bfd_abs_section_ptr;
1915 else if (isym->st_shndx == SHN_COMMON)
1916 sym_sec = bfd_com_section_ptr;
1918 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1919 symval = (isym->st_value
1920 + sym_sec->output_section->vma + sym_sec->output_offset);
1925 struct elf_link_hash_entry *h;
1927 /* An external symbol. */
1928 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1929 h = elf_sym_hashes (abfd)[indx];
1930 BFD_ASSERT (h != NULL);
1932 if (h->root.type != bfd_link_hash_defined
1933 && h->root.type != bfd_link_hash_defweak)
1934 /* This appears to be a reference to an undefined
1935 symbol. Just ignore it--it will be caught by the
1936 regular reloc processing. */
1939 symval = (h->root.u.def.value
1940 + h->root.u.def.section->output_section->vma
1941 + h->root.u.def.section->output_offset);
1944 /* For simplicity of coding, we are going to modify the section
1945 contents, the section relocs, and the BFD symbol table. We
1946 must tell the rest of the code not to free up this
1947 information. It would be possible to instead create a table
1948 of changes which have to be made, as is done in coff-mips.c;
1949 that would be more work, but would require less memory when
1950 the linker is run. */
1952 bfd_signed_vma value = symval;
1955 /* Compute the value that will be relocated. */
1956 value += irel->r_addend;
1957 /* Convert to PC relative. */
1958 value -= (sec->output_section->vma + sec->output_offset);
1959 value -= irel->r_offset;
1964 /* If it is in range then no modifications are needed. */
1965 if (value >= -512 && value <= 511)
1968 /* Get the opcode. */
1969 opcode = bfd_get_16 (abfd, contents + irel->r_offset);
1971 /* Compute the new opcode. We are going to convert:
1977 switch (opcode & 0xfc00)
1979 case 0x3800: opcode = 0x3402; break; /* Jl -> Jge +2 */
1980 case 0x3400: opcode = 0x3802; break; /* Jge -> Jl +2 */
1981 case 0x2c00: opcode = 0x2802; break; /* Jhs -> Jlo +2 */
1982 case 0x2800: opcode = 0x2c02; break; /* Jlo -> Jhs +2 */
1983 case 0x2400: opcode = 0x2002; break; /* Jeq -> Jne +2 */
1984 case 0x2000: opcode = 0x2402; break; /* jne -> Jeq +2 */
1985 case 0x3000: /* jn */
1986 /* There is no direct inverse of the Jn insn.
1987 FIXME: we could do this as:
1994 /* Not a conditional branch instruction. */
1995 /* fprintf (stderr, "unrecog: %x\n", opcode); */
1999 /* Note that we've changed the relocs, section contents, etc. */
2000 elf_section_data (sec)->relocs = internal_relocs;
2001 elf_section_data (sec)->this_hdr.contents = contents;
2002 symtab_hdr->contents = (unsigned char *) isymbuf;
2004 /* Install the new opcode. */
2005 bfd_put_16 (abfd, opcode, contents + irel->r_offset);
2007 /* Insert the new branch instruction. */
2008 if (uses_msp430x_relocs (abfd))
2010 /* Insert an absolute branch (aka MOVA) instruction. */
2011 contents = msp430_elf_relax_add_two_words
2012 (abfd, sec, irel->r_offset + 2, 0x0080, 0x0000);
2014 /* Update the relocation to point to the inserted branch
2015 instruction. Note - we are changing a PC-relative reloc
2016 into an absolute reloc, but this is OK because we have
2017 arranged with the assembler to have the reloc's value be
2018 a (local) symbol, not a section+offset value. */
2019 irel->r_offset += 2;
2020 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2021 R_MSP430X_ABS20_ADR_SRC);
2025 contents = msp430_elf_relax_add_two_words
2026 (abfd, sec, irel->r_offset + 2, 0x4030, 0x0000);
2028 /* See comment above about converting a 10-bit PC-rel
2029 relocation into a 16-bit absolute relocation. */
2030 irel->r_offset += 4;
2031 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2035 /* Growing the section may mean that other
2036 conditional branches need to be fixed. */
2040 for (irel = internal_relocs; irel < irelend; irel++)
2044 /* Get the section contents if we haven't done so already. */
2045 if (contents == NULL)
2047 /* Get cached copy if it exists. */
2048 if (elf_section_data (sec)->this_hdr.contents != NULL)
2049 contents = elf_section_data (sec)->this_hdr.contents;
2050 else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
2054 /* Read this BFD's local symbols if we haven't done so already. */
2055 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2057 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2058 if (isymbuf == NULL)
2059 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2060 symtab_hdr->sh_info, 0,
2062 if (isymbuf == NULL)
2066 /* Get the value of the symbol referred to by the reloc. */
2067 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2069 /* A local symbol. */
2070 Elf_Internal_Sym *isym;
2073 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2074 if (isym->st_shndx == SHN_UNDEF)
2075 sym_sec = bfd_und_section_ptr;
2076 else if (isym->st_shndx == SHN_ABS)
2077 sym_sec = bfd_abs_section_ptr;
2078 else if (isym->st_shndx == SHN_COMMON)
2079 sym_sec = bfd_com_section_ptr;
2081 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2082 symval = (isym->st_value
2083 + sym_sec->output_section->vma + sym_sec->output_offset);
2088 struct elf_link_hash_entry *h;
2090 /* An external symbol. */
2091 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2092 h = elf_sym_hashes (abfd)[indx];
2093 BFD_ASSERT (h != NULL);
2095 if (h->root.type != bfd_link_hash_defined
2096 && h->root.type != bfd_link_hash_defweak)
2097 /* This appears to be a reference to an undefined
2098 symbol. Just ignore it--it will be caught by the
2099 regular reloc processing. */
2102 symval = (h->root.u.def.value
2103 + h->root.u.def.section->output_section->vma
2104 + h->root.u.def.section->output_offset);
2107 /* For simplicity of coding, we are going to modify the section
2108 contents, the section relocs, and the BFD symbol table. We
2109 must tell the rest of the code not to free up this
2110 information. It would be possible to instead create a table
2111 of changes which have to be made, as is done in coff-mips.c;
2112 that would be more work, but would require less memory when
2113 the linker is run. */
2115 /* Try to turn a 16bit pc-relative branch into a 10bit pc-relative
2117 /* Paranoia? paranoia... */
2118 if (! uses_msp430x_relocs (abfd)
2119 && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL)
2121 bfd_vma value = symval;
2123 /* Deal with pc-relative gunk. */
2124 value -= (sec->output_section->vma + sec->output_offset);
2125 value -= irel->r_offset;
2126 value += irel->r_addend;
2128 /* See if the value will fit in 10 bits, note the high value is
2129 1016 as the target will be two bytes closer if we are
2131 if ((long) value < 1016 && (long) value > -1016)
2133 int code0 = 0, code1 = 0, code2 = 0;
2135 struct rcodes_s *rx;
2137 /* Get the opcode. */
2138 if (irel->r_offset >= 6)
2139 code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6);
2141 if (irel->r_offset >= 4)
2142 code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
2144 code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
2146 if (code2 != 0x4010)
2149 /* Check r4 and r3. */
2150 for (i = NUMB_RELAX_CODES - 1; i >= 0; i--)
2153 if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1)
2155 else if (rx->cdx == 1 && rx->f1 == code1)
2157 else if (rx->cdx == 0) /* This is an unconditional jump. */
2162 .Label0: ; we do not care about this label
2164 .Label1: ; make sure there is no label here
2166 .Label2: ; make sure there is no label here
2169 So, if there is .Label1 or .Label2 we cannot relax this code.
2170 This actually should not happen, cause for relaxable
2171 instructions we use RL_PCREL reloc instead of 16_PCREL.
2172 Will change this in the future. */
2175 && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
2176 irel->r_offset - 2))
2179 && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
2180 irel->r_offset - 4))
2183 /* Note that we've changed the relocs, section contents, etc. */
2184 elf_section_data (sec)->relocs = internal_relocs;
2185 elf_section_data (sec)->this_hdr.contents = contents;
2186 symtab_hdr->contents = (unsigned char *) isymbuf;
2188 /* Fix the relocation's type. */
2189 if (uses_msp430x_relocs (abfd))
2191 if (rx->labels == 3) /* Handle special cases. */
2192 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2193 R_MSP430X_2X_PCREL);
2195 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2196 R_MSP430X_10_PCREL);
2200 if (rx->labels == 3) /* Handle special cases. */
2201 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2204 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2208 /* Fix the opcode right way. */
2209 bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off);
2211 bfd_put_16 (abfd, rx->t1,
2212 contents + irel->r_offset - rx->off + 2);
2215 if (!msp430_elf_relax_delete_bytes (abfd, sec,
2216 irel->r_offset - rx->off +
2220 /* Handle unconditional jumps. */
2222 irel->r_offset -= 2;
2224 /* That will change things, so, we should relax again.
2225 Note that this is not required, and it may be slow. */
2230 /* Try to turn a 16-bit absolute branch into a 10-bit pc-relative
2232 if (uses_msp430x_relocs (abfd)
2233 && ELF32_R_TYPE (irel->r_info) == R_MSP430X_ABS16)
2235 bfd_vma value = symval;
2237 value -= (sec->output_section->vma + sec->output_offset);
2238 value -= irel->r_offset;
2239 value += irel->r_addend;
2241 /* See if the value will fit in 10 bits, note the high value is
2242 1016 as the target will be two bytes closer if we are
2244 if ((long) value < 1016 && (long) value > -1016)
2248 /* Get the opcode. */
2249 code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
2250 if (code2 != 0x4030)
2252 /* FIXME: check r4 and r3 ? */
2253 /* FIXME: Handle 0x4010 as well ? */
2255 /* Note that we've changed the relocs, section contents, etc. */
2256 elf_section_data (sec)->relocs = internal_relocs;
2257 elf_section_data (sec)->this_hdr.contents = contents;
2258 symtab_hdr->contents = (unsigned char *) isymbuf;
2260 /* Fix the relocation's type. */
2261 if (uses_msp430x_relocs (abfd))
2263 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2264 R_MSP430X_10_PCREL);
2268 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2272 /* Fix the opcode right way. */
2273 bfd_put_16 (abfd, 0x3c00, contents + irel->r_offset - 2);
2274 irel->r_offset -= 2;
2277 if (!msp430_elf_relax_delete_bytes (abfd, sec,
2278 irel->r_offset + 2, 2))
2281 /* That will change things, so, we should relax again.
2282 Note that this is not required, and it may be slow. */
2288 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2290 if (!link_info->keep_memory)
2294 /* Cache the symbols for elf_link_input_bfd. */
2295 symtab_hdr->contents = (unsigned char *) isymbuf;
2299 if (contents != NULL
2300 && elf_section_data (sec)->this_hdr.contents != contents)
2302 if (!link_info->keep_memory)
2306 /* Cache the section contents for elf_link_input_bfd. */
2307 elf_section_data (sec)->this_hdr.contents = contents;
2311 if (internal_relocs != NULL
2312 && elf_section_data (sec)->relocs != internal_relocs)
2313 free (internal_relocs);
2318 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2320 if (contents != NULL
2321 && elf_section_data (sec)->this_hdr.contents != contents)
2323 if (internal_relocs != NULL
2324 && elf_section_data (sec)->relocs != internal_relocs)
2325 free (internal_relocs);
2330 /* Handle an MSP430 specific section when reading an object file.
2331 This is called when bfd_section_from_shdr finds a section with
2335 elf32_msp430_section_from_shdr (bfd *abfd,
2336 Elf_Internal_Shdr * hdr,
2340 switch (hdr->sh_type)
2342 case SHT_MSP430_SEC_FLAGS:
2343 case SHT_MSP430_SYM_ALIASES:
2344 case SHT_MSP430_ATTRIBUTES:
2345 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
2352 elf32_msp430_obj_attrs_handle_unknown (bfd *abfd, int tag)
2355 (_("Warning: %B: Unknown MSPABI object attribute %d"),
2360 /* Determine whether an object attribute tag takes an integer, a
2364 elf32_msp430_obj_attrs_arg_type (int tag)
2366 if (tag == Tag_compatibility)
2367 return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
2370 return ATTR_TYPE_FLAG_INT_VAL;
2372 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
2375 static inline const char *
2380 case 1: return "MSP430";
2381 case 2: return "MSP430X";
2382 default: return "unknown";
2386 static inline const char *
2387 code_model (int model)
2391 case 1: return "small";
2392 case 2: return "large";
2393 default: return "unknown";
2397 static inline const char *
2398 data_model (int model)
2402 case 1: return "small";
2403 case 2: return "large";
2404 case 3: return "restricted large";
2405 default: return "unknown";
2409 /* Merge MSPABI object attributes from IBFD into OBFD.
2410 Raise an error if there are conflicting attributes. */
2413 elf32_msp430_merge_mspabi_attributes (bfd *ibfd, bfd *obfd)
2415 obj_attribute *in_attr;
2416 obj_attribute *out_attr;
2417 bfd_boolean result = TRUE;
2418 static bfd * first_input_bfd = NULL;
2420 /* Skip linker created files. */
2421 if (ibfd->flags & BFD_LINKER_CREATED)
2424 /* If this is the first real object just copy the attributes. */
2425 if (!elf_known_obj_attributes_proc (obfd)[0].i)
2427 _bfd_elf_copy_obj_attributes (ibfd, obfd);
2429 out_attr = elf_known_obj_attributes_proc (obfd);
2431 /* Use the Tag_null value to indicate that
2432 the attributes have been initialized. */
2435 first_input_bfd = ibfd;
2439 in_attr = elf_known_obj_attributes_proc (ibfd);
2440 out_attr = elf_known_obj_attributes_proc (obfd);
2442 /* The ISAs must be the same. */
2443 if (in_attr[OFBA_MSPABI_Tag_ISA].i != out_attr[OFBA_MSPABI_Tag_ISA].i)
2446 (_("error: %B uses %s instructions but %B uses %s"),
2447 ibfd, first_input_bfd,
2448 isa_type (in_attr[OFBA_MSPABI_Tag_ISA].i),
2449 isa_type (out_attr[OFBA_MSPABI_Tag_ISA].i));
2453 /* The code models must be the same. */
2454 if (in_attr[OFBA_MSPABI_Tag_Code_Model].i !=
2455 out_attr[OFBA_MSPABI_Tag_Code_Model].i)
2458 (_("error: %B uses the %s code model whereas %B uses the %s code model"),
2459 ibfd, first_input_bfd,
2460 code_model (in_attr[OFBA_MSPABI_Tag_Code_Model].i),
2461 code_model (out_attr[OFBA_MSPABI_Tag_Code_Model].i));
2465 /* The large code model is only supported by the MSP430X. */
2466 if (in_attr[OFBA_MSPABI_Tag_Code_Model].i == 2
2467 && out_attr[OFBA_MSPABI_Tag_ISA].i != 2)
2470 (_("error: %B uses the large code model but %B uses MSP430 instructions"),
2471 ibfd, first_input_bfd);
2475 /* The data models must be the same. */
2476 if (in_attr[OFBA_MSPABI_Tag_Data_Model].i !=
2477 out_attr[OFBA_MSPABI_Tag_Data_Model].i)
2480 (_("error: %B uses the %s data model whereas %B uses the %s data model"),
2481 ibfd, first_input_bfd,
2482 data_model (in_attr[OFBA_MSPABI_Tag_Data_Model].i),
2483 data_model (out_attr[OFBA_MSPABI_Tag_Data_Model].i));
2487 /* The small code model requires the use of the small data model. */
2488 if (in_attr[OFBA_MSPABI_Tag_Code_Model].i == 1
2489 && out_attr[OFBA_MSPABI_Tag_Data_Model].i != 1)
2492 (_("error: %B uses the small code model but %B uses the %s data model"),
2493 ibfd, first_input_bfd,
2494 data_model (out_attr[OFBA_MSPABI_Tag_Data_Model].i));
2498 /* The large data models are only supported by the MSP430X. */
2499 if (in_attr[OFBA_MSPABI_Tag_Data_Model].i > 1
2500 && out_attr[OFBA_MSPABI_Tag_ISA].i != 2)
2503 (_("error: %B uses the %s data model but %B only uses MSP430 instructions"),
2504 ibfd, first_input_bfd,
2505 data_model (in_attr[OFBA_MSPABI_Tag_Data_Model].i));
2512 /* Merge backend specific data from an object file to the output
2513 object file when linking. */
2516 elf32_msp430_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
2518 /* Make sure that the machine number reflects the most
2519 advanced version of the MSP architecture required. */
2520 #define max(a,b) ((a) > (b) ? (a) : (b))
2521 if (bfd_get_mach (ibfd) != bfd_get_mach (obfd))
2522 bfd_default_set_arch_mach (obfd, bfd_get_arch (obfd),
2523 max (bfd_get_mach (ibfd), bfd_get_mach (obfd)));
2526 return elf32_msp430_merge_mspabi_attributes (ibfd, obfd);
2530 msp430_elf_is_target_special_symbol (bfd *abfd, asymbol *sym)
2532 return _bfd_elf_is_local_label_name (abfd, sym->name);
2536 uses_large_model (bfd *abfd)
2538 obj_attribute * attr;
2540 if (abfd->flags & BFD_LINKER_CREATED)
2543 attr = elf_known_obj_attributes_proc (abfd);
2547 return attr[OFBA_MSPABI_Tag_Code_Model].i == 2;
2551 elf32_msp430_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED)
2553 return uses_large_model (abfd) ? 4 : 2;
2556 /* This is gross. The MSP430 EABI says that (sec 11.5):
2558 "An implementation may choose to use Rel or Rela
2559 type relocations for other relocations."
2561 But it also says that:
2563 "Certain relocations are identified as Rela only. [snip]
2564 Where Rela is specified, an implementation must honor
2567 There is one relocation marked as requiring RELA - R_MSP430_ABS_HI16 - but
2568 to keep things simple we choose to use RELA relocations throughout. The
2569 problem is that the TI compiler generates REL relocations, so we have to
2570 be able to accept those as well. */
2572 #define elf_backend_may_use_rel_p 1
2573 #define elf_backend_may_use_rela_p 1
2574 #define elf_backend_default_use_rela_p 1
2576 #undef elf_backend_obj_attrs_vendor
2577 #define elf_backend_obj_attrs_vendor "mspabi"
2578 #undef elf_backend_obj_attrs_section
2579 #define elf_backend_obj_attrs_section ".MSP430.attributes"
2580 #undef elf_backend_obj_attrs_section_type
2581 #define elf_backend_obj_attrs_section_type SHT_MSP430_ATTRIBUTES
2582 #define elf_backend_section_from_shdr elf32_msp430_section_from_shdr
2583 #define elf_backend_obj_attrs_handle_unknown elf32_msp430_obj_attrs_handle_unknown
2584 #undef elf_backend_obj_attrs_arg_type
2585 #define elf_backend_obj_attrs_arg_type elf32_msp430_obj_attrs_arg_type
2586 #define bfd_elf32_bfd_merge_private_bfd_data elf32_msp430_merge_private_bfd_data
2587 #define elf_backend_eh_frame_address_size elf32_msp430_eh_frame_address_size
2589 #define ELF_ARCH bfd_arch_msp430
2590 #define ELF_MACHINE_CODE EM_MSP430
2591 #define ELF_MACHINE_ALT1 EM_MSP430_OLD
2592 #define ELF_MAXPAGESIZE 4
2593 #define ELF_OSABI ELFOSABI_STANDALONE
2595 #define TARGET_LITTLE_SYM msp430_elf32_vec
2596 #define TARGET_LITTLE_NAME "elf32-msp430"
2598 #define elf_info_to_howto msp430_info_to_howto_rela
2599 #define elf_info_to_howto_rel NULL
2600 #define elf_backend_relocate_section elf32_msp430_relocate_section
2601 #define elf_backend_check_relocs elf32_msp430_check_relocs
2602 #define elf_backend_can_gc_sections 1
2603 #define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing
2604 #define elf_backend_object_p elf32_msp430_object_p
2605 #define bfd_elf32_bfd_relax_section msp430_elf_relax_section
2606 #define bfd_elf32_bfd_is_target_special_symbol msp430_elf_is_target_special_symbol
2609 #define elf32_bed elf32_msp430_bed
2611 #include "elf32-target.h"
2613 /* The TI compiler sets the OSABI field to ELFOSABI_NONE. */
2614 #undef TARGET_LITTLE_SYM
2615 #define TARGET_LITTLE_SYM msp430_elf32_ti_vec
2618 #define elf32_bed elf32_msp430_ti_bed
2621 #define ELF_OSABI ELFOSABI_NONE
2623 static const struct bfd_elf_special_section msp430_ti_elf_special_sections[] =
2625 /* prefix, prefix_length, suffix_len, type, attributes. */
2626 { STRING_COMMA_LEN (".TI.symbol.alias"), 0, SHT_MSP430_SYM_ALIASES, 0 },
2627 { STRING_COMMA_LEN (".TI.section.flags"), 0, SHT_MSP430_SEC_FLAGS, 0 },
2628 { STRING_COMMA_LEN ("_TI_build_attrib"), 0, SHT_MSP430_ATTRIBUTES, 0 },
2629 { NULL, 0, 0, 0, 0 }
2632 #undef elf_backend_special_sections
2633 #define elf_backend_special_sections msp430_ti_elf_special_sections
2635 #include "elf32-target.h"