1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2016 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
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. */
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
37 static const unsigned int plt0_entry
[] =
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
46 static const unsigned int plt0_pic_entry
[] =
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
55 static const unsigned int plt_entry
[] =
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
64 static const unsigned int plt_pic_entry
[] =
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
89 elf_metag_dyn_reloc_entry "hdh"
91 Always remember to use GNU Coding Style. */
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
95 static reloc_howto_type elf_metag_howto_table
[] =
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16
, /* type */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
102 FALSE
, /* pc_relative */
104 complain_overflow_dont
, /* complain_on_overflow */
105 bfd_elf_generic_reloc
, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE
, /* partial_inplace */
109 0x0007fff8, /* dst_mask */
110 FALSE
), /* pcrel_offset */
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16
, /* type */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
117 FALSE
, /* pc_relative */
119 complain_overflow_dont
,/* complain_on_overflow */
120 bfd_elf_generic_reloc
, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE
, /* partial_inplace */
124 0x0007fff8, /* dst_mask */
125 FALSE
), /* pcrel_offset */
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32
, /* type */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
132 FALSE
, /* pc_relative */
134 complain_overflow_bitfield
, /* complain_on_overflow */
135 bfd_elf_generic_reloc
, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE
, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE
), /* pcrel_offset */
143 HOWTO (R_METAG_NONE
, /* type */
145 3, /* size (0 = byte, 1 = short, 2 = long) */
147 FALSE
, /* pc_relative */
149 complain_overflow_dont
, /* complain_on_overflow */
150 bfd_elf_generic_reloc
, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE
, /* partial_inplace */
155 FALSE
), /* pcrel_offset */
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH
, /* type */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
162 TRUE
, /* pc_relative */
164 complain_overflow_signed
, /* complain_on_overflow */
165 bfd_elf_generic_reloc
, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE
, /* partial_inplace */
169 0x00ffffe0, /* dst_mask */
170 FALSE
), /* pcrel_offset */
173 HOWTO (R_METAG_GETSETOFF
, /* type */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
177 FALSE
, /* pc_relative */
179 complain_overflow_dont
, /* complain_on_overflow */
180 bfd_elf_generic_reloc
, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE
, /* partial_inplace */
185 FALSE
), /* pcrel_offset */
212 HOWTO (R_METAG_GNU_VTINHERIT
, /* type */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
216 FALSE
, /* pc_relative */
218 complain_overflow_dont
, /* complain_on_overflow */
219 NULL
, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE
, /* partial_inplace */
224 FALSE
), /* pcrel_offset */
226 HOWTO (R_METAG_GNU_VTENTRY
, /* type */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
230 FALSE
, /* pc_relative */
232 complain_overflow_dont
, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE
, /* partial_inplace */
238 FALSE
), /* pcrel_offset */
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF
, /* type */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
245 FALSE
, /* pc_relative */
247 complain_overflow_dont
, /* complain_on_overflow */
248 bfd_elf_generic_reloc
, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE
, /* partial_inplace */
252 0x0007fff8, /* dst_mask */
253 FALSE
), /* pcrel_offset */
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF
, /* type */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
260 FALSE
, /* pc_relative */
262 complain_overflow_dont
, /* complain_on_overflow */
263 bfd_elf_generic_reloc
, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE
, /* partial_inplace */
267 0x0007fff8, /* dst_mask */
268 FALSE
), /* pcrel_offset */
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF
, /* type */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
275 FALSE
, /* pc_relative */
277 complain_overflow_dont
, /* complain_on_overflow */
278 bfd_elf_generic_reloc
, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE
, /* partial_inplace */
283 FALSE
), /* pcrel_offset */
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT
, /* type */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
290 FALSE
, /* pc_relative */
292 complain_overflow_dont
, /* complain_on_overflow */
293 bfd_elf_generic_reloc
, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE
, /* partial_inplace */
298 FALSE
), /* pcrel_offset */
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC
, /* type */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
305 FALSE
, /* pc_relative */
307 complain_overflow_dont
, /* complain_on_overflow */
308 bfd_elf_generic_reloc
, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE
, /* partial_inplace */
312 0x0007fff8, /* dst_mask */
313 FALSE
), /* pcrel_offset */
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC
, /* type */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
320 FALSE
, /* pc_relative */
322 complain_overflow_dont
, /* complain_on_overflow */
323 bfd_elf_generic_reloc
, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE
, /* partial_inplace */
327 0x0007fff8, /* dst_mask */
328 FALSE
), /* pcrel_offset */
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT
, /* type */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
335 FALSE
, /* pc_relative */
337 complain_overflow_dont
, /* complain_on_overflow */
338 bfd_elf_generic_reloc
, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE
, /* partial_inplace */
342 0x0007fff8, /* dst_mask */
343 FALSE
), /* pcrel_offset */
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT
, /* type */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
350 FALSE
, /* pc_relative */
352 complain_overflow_dont
, /* complain_on_overflow */
353 bfd_elf_generic_reloc
, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE
, /* partial_inplace */
357 0xffffffff, /* dst_mask */
358 FALSE
), /* pcrel_offset */
360 HOWTO (R_METAG_RELBRANCH_PLT
, /* type */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
364 TRUE
, /* pc_relative */
366 complain_overflow_signed
, /* complain_on_overflow */
367 bfd_elf_generic_reloc
, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE
, /* partial_inplace */
371 0x00ffffe0, /* dst_mask */
372 FALSE
), /* pcrel_offset */
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF
, /* type */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 FALSE
, /* pc_relative */
381 complain_overflow_bitfield
, /* complain_on_overflow */
382 bfd_elf_generic_reloc
, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE
, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE
), /* pcrel_offset */
389 HOWTO (R_METAG_PLT
, /* type */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_bitfield
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE
, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY
, /* type */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
412 FALSE
, /* pc_relative */
414 complain_overflow_bitfield
, /* complain_on_overflow */
415 bfd_elf_generic_reloc
, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE
, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE
), /* pcrel_offset */
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT
, /* type */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
427 FALSE
, /* pc_relative */
429 complain_overflow_bitfield
, /* complain_on_overflow */
430 bfd_elf_generic_reloc
, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE
, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE
), /* pcrel_offset */
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
440 HOWTO (R_METAG_RELATIVE
, /* type */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
444 FALSE
, /* pc_relative */
446 complain_overflow_bitfield
, /* complain_on_overflow */
447 bfd_elf_generic_reloc
, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE
, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE
), /* pcrel_offset */
454 HOWTO (R_METAG_GLOB_DAT
, /* type */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
458 FALSE
, /* pc_relative */
460 complain_overflow_bitfield
, /* complain_on_overflow */
461 bfd_elf_generic_reloc
, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE
, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE
), /* pcrel_offset */
468 HOWTO (R_METAG_TLS_GD
, /* type */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
472 FALSE
, /* pc_relative */
474 complain_overflow_dont
, /* complain_on_overflow */
475 bfd_elf_generic_reloc
, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE
, /* partial_inplace */
479 0x0007fff8, /* dst_mask */
480 FALSE
), /* pcrel_offset */
482 HOWTO (R_METAG_TLS_LDM
, /* type */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
486 FALSE
, /* pc_relative */
488 complain_overflow_bitfield
, /* complain_on_overflow */
489 bfd_elf_generic_reloc
, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE
, /* partial_inplace */
493 0x0007fff8, /* dst_mask */
494 FALSE
), /* pcrel_offset */
496 HOWTO (R_METAG_TLS_LDO_HI16
, /* type */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
500 FALSE
, /* pc_relative */
502 complain_overflow_bitfield
, /* complain_on_overflow */
503 bfd_elf_generic_reloc
, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE
, /* partial_inplace */
507 0x0007fff8, /* dst_mask */
508 FALSE
), /* pcrel_offset */
510 HOWTO (R_METAG_TLS_LDO_LO16
, /* type */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
514 FALSE
, /* pc_relative */
516 complain_overflow_bitfield
, /* complain_on_overflow */
517 bfd_elf_generic_reloc
, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE
, /* partial_inplace */
521 0x0007fff8, /* dst_mask */
522 FALSE
), /* pcrel_offset */
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO
, /* type */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
529 FALSE
, /* pc_relative */
531 complain_overflow_bitfield
, /* complain_on_overflow */
532 bfd_elf_generic_reloc
, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE
, /* partial_inplace */
536 0x0007fff8, /* dst_mask */
537 FALSE
), /* pcrel_offset */
539 HOWTO (R_METAG_TLS_IE
, /* type */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
543 FALSE
, /* pc_relative */
545 complain_overflow_dont
, /* complain_on_overflow */
546 bfd_elf_generic_reloc
, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE
, /* partial_inplace */
550 0x0007ff80, /* dst_mask */
551 FALSE
), /* pcrel_offset */
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC
, /* type */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
558 FALSE
, /* pc_relative */
560 complain_overflow_dont
, /* complain_on_overflow */
561 bfd_elf_generic_reloc
, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE
, /* partial_inplace */
565 0x0007fff8, /* dst_mask */
566 FALSE
), /* pcrel_offset */
568 HOWTO (R_METAG_TLS_IENONPIC_HI16
,/* type */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
572 FALSE
, /* pc_relative */
574 complain_overflow_dont
, /* complain_on_overflow */
575 bfd_elf_generic_reloc
, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE
, /* partial_inplace */
579 0x0007fff8, /* dst_mask */
580 FALSE
), /* pcrel_offset */
582 HOWTO (R_METAG_TLS_IENONPIC_LO16
,/* type */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
586 FALSE
, /* pc_relative */
588 complain_overflow_dont
, /* complain_on_overflow */
589 bfd_elf_generic_reloc
, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE
, /* partial_inplace */
593 0x0007fff8, /* dst_mask */
594 FALSE
), /* pcrel_offset */
596 HOWTO (R_METAG_TLS_TPOFF
, /* type */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
600 FALSE
, /* pc_relative */
602 complain_overflow_bitfield
, /* complain_on_overflow */
603 bfd_elf_generic_reloc
, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE
, /* partial_inplace */
607 0xffffffff, /* dst_mask */
608 FALSE
), /* pcrel_offset */
610 HOWTO (R_METAG_TLS_DTPMOD
, /* type */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
614 FALSE
, /* pc_relative */
616 complain_overflow_bitfield
, /* complain_on_overflow */
617 bfd_elf_generic_reloc
, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE
, /* partial_inplace */
621 0xffffffff, /* dst_mask */
622 FALSE
), /* pcrel_offset */
624 HOWTO (R_METAG_TLS_DTPOFF
, /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 FALSE
, /* pc_relative */
630 complain_overflow_bitfield
, /* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE
, /* partial_inplace */
635 0xffffffff, /* dst_mask */
636 FALSE
), /* pcrel_offset */
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE
, /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 FALSE
, /* pc_relative */
645 complain_overflow_bitfield
, /* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE
, /* partial_inplace */
650 0xffffffff, /* dst_mask */
651 FALSE
), /* pcrel_offset */
653 HOWTO (R_METAG_TLS_LE_HI16
, /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 FALSE
, /* pc_relative */
659 complain_overflow_dont
, /* complain_on_overflow */
660 bfd_elf_generic_reloc
, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE
, /* partial_inplace */
664 0x0007fff8, /* dst_mask */
665 FALSE
), /* pcrel_offset */
667 HOWTO (R_METAG_TLS_LE_LO16
, /* type */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
671 FALSE
, /* pc_relative */
673 complain_overflow_dont
, /* complain_on_overflow */
674 bfd_elf_generic_reloc
, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE
, /* partial_inplace */
678 0x0007fff8, /* dst_mask */
679 FALSE
), /* pcrel_offset */
683 #define BRANCH_BITS 19
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
696 struct metag_reloc_map
698 bfd_reloc_code_real_type bfd_reloc_val
;
699 unsigned int metag_reloc_val
;
702 static const struct metag_reloc_map metag_reloc_map
[] =
704 { BFD_RELOC_NONE
, R_METAG_NONE
},
705 { BFD_RELOC_32
, R_METAG_ADDR32
},
706 { BFD_RELOC_METAG_HIADDR16
, R_METAG_HIADDR16
},
707 { BFD_RELOC_METAG_LOADDR16
, R_METAG_LOADDR16
},
708 { BFD_RELOC_METAG_RELBRANCH
, R_METAG_RELBRANCH
},
709 { BFD_RELOC_METAG_GETSETOFF
, R_METAG_GETSETOFF
},
710 { BFD_RELOC_VTABLE_INHERIT
, R_METAG_GNU_VTINHERIT
},
711 { BFD_RELOC_VTABLE_ENTRY
, R_METAG_GNU_VTENTRY
},
712 { BFD_RELOC_METAG_REL8
, R_METAG_REL8
},
713 { BFD_RELOC_METAG_REL16
, R_METAG_REL16
},
714 { BFD_RELOC_METAG_HI16_GOTOFF
, R_METAG_HI16_GOTOFF
},
715 { BFD_RELOC_METAG_LO16_GOTOFF
, R_METAG_LO16_GOTOFF
},
716 { BFD_RELOC_METAG_GETSET_GOTOFF
, R_METAG_GETSET_GOTOFF
},
717 { BFD_RELOC_METAG_GETSET_GOT
, R_METAG_GETSET_GOT
},
718 { BFD_RELOC_METAG_HI16_GOTPC
, R_METAG_HI16_GOTPC
},
719 { BFD_RELOC_METAG_LO16_GOTPC
, R_METAG_LO16_GOTPC
},
720 { BFD_RELOC_METAG_HI16_PLT
, R_METAG_HI16_PLT
},
721 { BFD_RELOC_METAG_LO16_PLT
, R_METAG_LO16_PLT
},
722 { BFD_RELOC_METAG_RELBRANCH_PLT
, R_METAG_RELBRANCH_PLT
},
723 { BFD_RELOC_METAG_GOTOFF
, R_METAG_GOTOFF
},
724 { BFD_RELOC_METAG_PLT
, R_METAG_PLT
},
725 { BFD_RELOC_METAG_COPY
, R_METAG_COPY
},
726 { BFD_RELOC_METAG_JMP_SLOT
, R_METAG_JMP_SLOT
},
727 { BFD_RELOC_METAG_RELATIVE
, R_METAG_RELATIVE
},
728 { BFD_RELOC_METAG_GLOB_DAT
, R_METAG_GLOB_DAT
},
729 { BFD_RELOC_METAG_TLS_GD
, R_METAG_TLS_GD
},
730 { BFD_RELOC_METAG_TLS_LDM
, R_METAG_TLS_LDM
},
731 { BFD_RELOC_METAG_TLS_LDO_HI16
, R_METAG_TLS_LDO_HI16
},
732 { BFD_RELOC_METAG_TLS_LDO_LO16
, R_METAG_TLS_LDO_LO16
},
733 { BFD_RELOC_METAG_TLS_LDO
, R_METAG_TLS_LDO
},
734 { BFD_RELOC_METAG_TLS_IE
, R_METAG_TLS_IE
},
735 { BFD_RELOC_METAG_TLS_IENONPIC
, R_METAG_TLS_IENONPIC
},
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16
, R_METAG_TLS_IENONPIC_HI16
},
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16
, R_METAG_TLS_IENONPIC_LO16
},
738 { BFD_RELOC_METAG_TLS_TPOFF
, R_METAG_TLS_TPOFF
},
739 { BFD_RELOC_METAG_TLS_DTPMOD
, R_METAG_TLS_DTPMOD
},
740 { BFD_RELOC_METAG_TLS_DTPOFF
, R_METAG_TLS_DTPOFF
},
741 { BFD_RELOC_METAG_TLS_LE
, R_METAG_TLS_LE
},
742 { BFD_RELOC_METAG_TLS_LE_HI16
, R_METAG_TLS_LE_HI16
},
743 { BFD_RELOC_METAG_TLS_LE_LO16
, R_METAG_TLS_LE_LO16
},
746 enum elf_metag_stub_type
748 metag_stub_long_branch
,
749 metag_stub_long_branch_shared
,
753 struct elf_metag_stub_hash_entry
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root
;
758 /* The stub section. */
761 /* Offset within stub_sec of the beginning of this stub. */
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value
;
767 asection
*target_section
;
769 enum elf_metag_stub_type stub_type
;
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry
*hh
;
774 /* And the reloc addend that this was derived from. */
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
782 struct elf_metag_link_hash_entry
784 struct elf_link_hash_entry eh
;
786 /* A pointer to the most recently used stub hash entry against this
788 struct elf_metag_stub_hash_entry
*hsh_cache
;
790 /* Used to count relocations for delayed sizing of relocation
792 struct elf_metag_dyn_reloc_entry
{
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry
*hdh_next
;
797 /* The input section of the reloc. */
800 /* Number of relocs copied in this section. */
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count
;
809 GOT_UNKNOWN
= 0, GOT_NORMAL
= 1, GOT_TLS_IE
= 2, GOT_TLS_LDM
= 4, GOT_TLS_GD
= 8
813 struct elf_metag_link_hash_table
815 /* The main hash table. */
816 struct elf_link_hash_table etab
;
818 /* The stub hash table. */
819 struct bfd_hash_table bstab
;
821 /* Linker stub bfd. */
824 /* Linker call-backs. */
825 asection
* (*add_stub_section
) (const char *, asection
*);
826 void (*layout_sections_again
) (void);
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
832 /* This is the section to which stubs in the group will be
835 /* The stub section. */
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count
;
841 unsigned int top_index
;
842 asection
**input_list
;
843 Elf_Internal_Sym
**all_local_syms
;
845 /* Short-cuts to get to dynamic linker sections. */
854 /* Small local sym cache. */
855 struct sym_cache sym_cache
;
857 /* Data for LDM relocations. */
860 bfd_signed_vma refcount
;
865 /* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
869 dtpoff_base (struct bfd_link_info
*info
)
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info
)->tls_sec
== NULL
)
874 return elf_hash_table (info
)->tls_sec
->vma
;
877 /* Return the relocation value for R_METAG_TLS_IE */
879 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info
)->tls_sec
== NULL
)
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address
- elf_hash_table (info
)->tls_sec
->vma
887 + align_power ((bfd_vma
) 8,
888 elf_hash_table (info
)->tls_sec
->alignment_power
));
892 metag_info_to_howto_rela (bfd
*abfd ATTRIBUTE_UNUSED
,
894 Elf_Internal_Rela
*dst
)
898 r_type
= ELF32_R_TYPE (dst
->r_info
);
899 if (r_type
>= (unsigned int) R_METAG_MAX
)
901 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd
, r_type
);
904 cache_ptr
->howto
= & elf_metag_howto_table
[r_type
];
907 static reloc_howto_type
*
908 metag_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
909 bfd_reloc_code_real_type code
)
913 for (i
= 0; i
< sizeof (metag_reloc_map
) / sizeof (metag_reloc_map
[0]); i
++)
914 if (metag_reloc_map
[i
].bfd_reloc_val
== code
)
915 return & elf_metag_howto_table
[metag_reloc_map
[i
].metag_reloc_val
];
920 static reloc_howto_type
*
921 metag_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
926 for (i
= 0; i
< sizeof (elf_metag_howto_table
) / sizeof (elf_metag_howto_table
[0]); i
++)
927 if (elf_metag_howto_table
[i
].name
!= NULL
928 && strcasecmp (elf_metag_howto_table
[i
].name
, r_name
) == 0)
929 return &elf_metag_howto_table
[i
];
934 /* Various hash macros and functions. */
935 #define metag_link_hash_table(p) \
936 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
937 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
939 #define metag_elf_hash_entry(ent) \
940 ((struct elf_metag_link_hash_entry *)(ent))
942 #define metag_stub_hash_entry(ent) \
943 ((struct elf_metag_stub_hash_entry *)(ent))
945 #define metag_stub_hash_lookup(table, string, create, copy) \
946 ((struct elf_metag_stub_hash_entry *) \
947 bfd_hash_lookup ((table), (string), (create), (copy)))
949 #define metag_elf_local_got_tls_type(abfd) \
950 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
952 /* Assorted hash table functions. */
954 /* Initialize an entry in the stub hash table. */
956 static struct bfd_hash_entry
*
957 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
958 struct bfd_hash_table
*table
,
961 /* Allocate the structure if it has not already been allocated by a
965 entry
= bfd_hash_allocate (table
,
966 sizeof (struct elf_metag_stub_hash_entry
));
971 /* Call the allocation method of the superclass. */
972 entry
= bfd_hash_newfunc (entry
, table
, string
);
975 struct elf_metag_stub_hash_entry
*hsh
;
977 /* Initialize the local fields. */
978 hsh
= (struct elf_metag_stub_hash_entry
*) entry
;
979 hsh
->stub_sec
= NULL
;
980 hsh
->stub_offset
= 0;
981 hsh
->target_value
= 0;
982 hsh
->target_section
= NULL
;
983 hsh
->stub_type
= metag_stub_long_branch
;
991 /* Initialize an entry in the link hash table. */
993 static struct bfd_hash_entry
*
994 metag_link_hash_newfunc (struct bfd_hash_entry
*entry
,
995 struct bfd_hash_table
*table
,
998 /* Allocate the structure if it has not already been allocated by a
1002 entry
= bfd_hash_allocate (table
,
1003 sizeof (struct elf_metag_link_hash_entry
));
1008 /* Call the allocation method of the superclass. */
1009 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1012 struct elf_metag_link_hash_entry
*hh
;
1014 /* Initialize the local fields. */
1015 hh
= (struct elf_metag_link_hash_entry
*) entry
;
1016 hh
->hsh_cache
= NULL
;
1017 hh
->dyn_relocs
= NULL
;
1018 hh
->tls_type
= GOT_UNKNOWN
;
1024 /* Free the derived linker hash table. */
1027 elf_metag_link_hash_table_free (bfd
*obfd
)
1029 struct elf_metag_link_hash_table
*htab
1030 = (struct elf_metag_link_hash_table
*) obfd
->link
.hash
;
1032 bfd_hash_table_free (&htab
->bstab
);
1033 _bfd_elf_link_hash_table_free (obfd
);
1036 /* Create the derived linker hash table. The Meta ELF port uses the derived
1037 hash table to keep information specific to the Meta ELF linker (without
1038 using static variables). */
1040 static struct bfd_link_hash_table
*
1041 elf_metag_link_hash_table_create (bfd
*abfd
)
1043 struct elf_metag_link_hash_table
*htab
;
1044 bfd_size_type amt
= sizeof (*htab
);
1046 htab
= bfd_zmalloc (amt
);
1050 if (!_bfd_elf_link_hash_table_init (&htab
->etab
, abfd
,
1051 metag_link_hash_newfunc
,
1052 sizeof (struct elf_metag_link_hash_entry
),
1059 /* Init the stub hash table too. */
1060 if (!bfd_hash_table_init (&htab
->bstab
, stub_hash_newfunc
,
1061 sizeof (struct elf_metag_stub_hash_entry
)))
1063 _bfd_elf_link_hash_table_free (abfd
);
1066 htab
->etab
.root
.hash_table_free
= elf_metag_link_hash_table_free
;
1068 return &htab
->etab
.root
;
1071 /* Section name for stubs is the associated section name plus this
1073 #define STUB_SUFFIX ".stub"
1075 /* Build a name for an entry in the stub hash table. */
1078 metag_stub_name (const asection
*input_section
,
1079 const asection
*sym_sec
,
1080 const struct elf_metag_link_hash_entry
*hh
,
1081 const Elf_Internal_Rela
*rel
)
1088 len
= 8 + 1 + strlen (hh
->eh
.root
.root
.string
) + 1 + 8 + 1;
1089 stub_name
= bfd_malloc (len
);
1090 if (stub_name
!= NULL
)
1092 sprintf (stub_name
, "%08x_%s+%x",
1093 input_section
->id
& 0xffffffff,
1094 hh
->eh
.root
.root
.string
,
1095 (int) rel
->r_addend
& 0xffffffff);
1100 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1101 stub_name
= bfd_malloc (len
);
1102 if (stub_name
!= NULL
)
1104 sprintf (stub_name
, "%08x_%x:%x+%x",
1105 input_section
->id
& 0xffffffff,
1106 sym_sec
->id
& 0xffffffff,
1107 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
1108 (int) rel
->r_addend
& 0xffffffff);
1114 /* Look up an entry in the stub hash. Stub entries are cached because
1115 creating the stub name takes a bit of time. */
1117 static struct elf_metag_stub_hash_entry
*
1118 metag_get_stub_entry (const asection
*input_section
,
1119 const asection
*sym_sec
,
1120 struct elf_metag_link_hash_entry
*hh
,
1121 const Elf_Internal_Rela
*rel
,
1122 struct elf_metag_link_hash_table
*htab
)
1124 struct elf_metag_stub_hash_entry
*hsh
;
1125 const asection
*id_sec
;
1127 /* If this input section is part of a group of sections sharing one
1128 stub section, then use the id of the first section in the group.
1129 Stub names need to include a section id, as there may well be
1130 more than one stub used to reach say, printf, and we need to
1131 distinguish between them. */
1132 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
1134 if (hh
!= NULL
&& hh
->hsh_cache
!= NULL
1135 && hh
->hsh_cache
->hh
== hh
1136 && hh
->hsh_cache
->id_sec
== id_sec
)
1138 hsh
= hh
->hsh_cache
;
1144 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, rel
);
1145 if (stub_name
== NULL
)
1148 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
1149 stub_name
, FALSE
, FALSE
);
1152 hh
->hsh_cache
= hsh
;
1160 /* Add a new stub entry to the stub hash. Not all fields of the new
1161 stub entry are initialised. */
1163 static struct elf_metag_stub_hash_entry
*
1164 metag_add_stub (const char *stub_name
,
1166 struct elf_metag_link_hash_table
*htab
)
1170 struct elf_metag_stub_hash_entry
*hsh
;
1172 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
1173 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
1174 if (stub_sec
== NULL
)
1176 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
1177 if (stub_sec
== NULL
)
1183 namelen
= strlen (link_sec
->name
);
1184 len
= namelen
+ sizeof (STUB_SUFFIX
);
1185 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
1189 memcpy (s_name
, link_sec
->name
, namelen
);
1190 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
1192 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
1193 if (stub_sec
== NULL
)
1195 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
1197 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
1200 /* Enter this entry into the linker stub hash table. */
1201 hsh
= metag_stub_hash_lookup (&htab
->bstab
, stub_name
,
1205 (*_bfd_error_handler
) (_("%B: cannot create stub entry %s"),
1211 hsh
->stub_sec
= stub_sec
;
1212 hsh
->stub_offset
= 0;
1213 hsh
->id_sec
= link_sec
;
1217 /* Check a signed integer value can be represented in the given number
1221 within_signed_range (int value
, unsigned int bits
)
1223 int min_val
= -(1 << (bits
- 1));
1224 int max_val
= (1 << (bits
- 1)) - 1;
1225 return (value
<= max_val
) && (value
>= min_val
);
1228 /* Perform a relocation as part of a final link. */
1230 static bfd_reloc_status_type
1231 metag_final_link_relocate (reloc_howto_type
*howto
,
1233 asection
*input_section
,
1235 Elf_Internal_Rela
*rel
,
1237 struct elf_metag_link_hash_entry
*hh
,
1238 struct elf_metag_link_hash_table
*htab
,
1241 bfd_reloc_status_type r
= bfd_reloc_ok
;
1242 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
1243 int opcode
, op_shift
, op_extended
, l1
, l2
;
1244 bfd_signed_vma srel
, addend
= rel
->r_addend
;
1245 struct elf_metag_stub_hash_entry
*hsh
= NULL
;
1248 /* Find out where we are and where we're going. */
1249 location
= (rel
->r_offset
+
1250 input_section
->output_offset
+
1251 input_section
->output_section
->vma
);
1253 switch (howto
->type
)
1255 case R_METAG_RELBRANCH
:
1256 case R_METAG_RELBRANCH_PLT
:
1257 /* Make it a pc relative offset. */
1258 relocation
-= location
;
1260 case R_METAG_TLS_GD
:
1261 case R_METAG_TLS_IE
:
1262 relocation
-= elf_gp (input_section
->output_section
->owner
);
1268 switch (howto
->type
)
1270 case R_METAG_RELBRANCH_PLT
:
1271 case R_METAG_RELBRANCH
:
1272 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1274 srel
= (bfd_signed_vma
) relocation
;
1277 /* If the branch is out of reach, then redirect the
1278 call to the local stub for this function. */
1279 if (srel
> ((1 << (BRANCH_BITS
+ 1)) - 1) ||
1280 (srel
< - (1 << (BRANCH_BITS
+ 1))))
1282 if (sym_sec
== NULL
)
1285 hsh
= metag_get_stub_entry (input_section
, sym_sec
,
1288 return bfd_reloc_undefined
;
1290 /* Munge up the value and addend so that we call the stub
1291 rather than the procedure directly. */
1292 srel
= (hsh
->stub_offset
1293 + hsh
->stub_sec
->output_offset
1294 + hsh
->stub_sec
->output_section
->vma
);
1300 if (!within_signed_range (srel
, BRANCH_BITS
))
1302 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1305 return bfd_reloc_overflow
;
1308 opcode
&= ~(0x7ffff << 5);
1309 opcode
|= ((srel
& 0x7ffff) << 5);
1311 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1313 case R_METAG_GETSETOFF
:
1314 case R_METAG_GETSET_GOT
:
1315 case R_METAG_GETSET_GOTOFF
:
1316 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1318 srel
= (bfd_signed_vma
) relocation
;
1321 /* Is this a standard or extended GET/SET? */
1322 if ((opcode
& 0xf0000000) == 0xa0000000)
1324 /* Extended GET/SET. */
1331 /* Standard GET/SET. */
1332 l1
= opcode
& 0x01000000;
1333 l2
= opcode
& 0x04000000;
1337 /* Calculate the width of the GET/SET and how much we need to
1338 shift the result by. */
1350 /* GET/SET offsets are scaled by the width of the transfer. */
1351 srel
= srel
>> op_shift
;
1353 /* Extended GET/SET has signed 12 bits of offset, standard has
1357 if (!within_signed_range (srel
, 12))
1359 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1362 return bfd_reloc_overflow
;
1364 opcode
&= ~(0xfff << 7);
1365 opcode
|= ((srel
& 0xfff) << 7);
1369 if (!within_signed_range (srel
, 5))
1371 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1374 return bfd_reloc_overflow
;
1376 opcode
&= ~(0x3f << 8);
1377 opcode
|= ((srel
& 0x3f) << 8);
1380 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1382 case R_METAG_TLS_GD
:
1383 case R_METAG_TLS_LDM
:
1384 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1386 if ((bfd_signed_vma
)relocation
< 0)
1388 /* sign extend immediate */
1389 if ((opcode
& 0xf2000001) == 0x02000000)
1391 /* ADD De.e,Dx.r,#I16 */
1395 return bfd_reloc_overflow
;
1398 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1400 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1401 contents
, rel
->r_offset
,
1402 relocation
, rel
->r_addend
);
1405 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1406 contents
, rel
->r_offset
,
1407 relocation
, rel
->r_addend
);
1413 /* This is defined because R_METAG_NONE != 0...
1414 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1415 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1416 rel, relend, howto, contents) \
1418 _bfd_clear_contents (howto, input_bfd, input_section, \
1419 contents + rel->r_offset); \
1421 if (bfd_link_relocatable (info) \
1422 && (input_section->flags & SEC_DEBUGGING)) \
1424 /* Only remove relocations in debug sections since other \
1425 sections may require relocations. */ \
1426 Elf_Internal_Shdr *rel_hdr; \
1428 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1430 /* Avoid empty output section. */ \
1431 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1433 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1434 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1435 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1437 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1439 input_section->reloc_count--; \
1446 rel->r_info = R_METAG_NONE; \
1447 rel->r_addend = 0; \
1451 /* Relocate a META ELF section.
1453 The RELOCATE_SECTION function is called by the new ELF backend linker
1454 to handle the relocations for a section.
1456 The relocs are always passed as Rela structures; if the section
1457 actually uses Rel structures, the r_addend field will always be
1460 This function is responsible for adjusting the section contents as
1461 necessary, and (if using Rela relocs and generating a relocatable
1462 output file) adjusting the reloc addend as necessary.
1464 This function does not have to worry about setting the reloc
1465 address or the reloc symbol index.
1467 LOCAL_SYMS is a pointer to the swapped in local symbols.
1469 LOCAL_SECTIONS is an array giving the section in the input file
1470 corresponding to the st_shndx field of each local symbol.
1472 The global hash table entry for the global symbols can be found
1473 via elf_sym_hashes (input_bfd).
1475 When generating relocatable output, this function must handle
1476 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1477 going to be the section symbol corresponding to the output
1478 section, which means that the addend must be adjusted
1482 elf_metag_relocate_section (bfd
*output_bfd
,
1483 struct bfd_link_info
*info
,
1485 asection
*input_section
,
1487 Elf_Internal_Rela
*relocs
,
1488 Elf_Internal_Sym
*local_syms
,
1489 asection
**local_sections
)
1491 bfd_vma
*local_got_offsets
;
1492 Elf_Internal_Shdr
*symtab_hdr
;
1493 struct elf_link_hash_entry
**eh_syms
;
1494 struct elf_metag_link_hash_table
*htab
;
1495 Elf_Internal_Rela
*rel
;
1496 Elf_Internal_Rela
*relend
;
1499 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1500 eh_syms
= elf_sym_hashes (input_bfd
);
1501 relend
= relocs
+ input_section
->reloc_count
;
1503 htab
= metag_link_hash_table (info
);
1504 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1508 for (rel
= relocs
; rel
< relend
; rel
++)
1510 reloc_howto_type
*howto
;
1511 unsigned long r_symndx
;
1512 Elf_Internal_Sym
*sym
;
1514 struct elf_metag_link_hash_entry
*hh
;
1516 bfd_reloc_status_type r
;
1520 r_type
= ELF32_R_TYPE (rel
->r_info
);
1522 if (r_type
== R_METAG_GNU_VTINHERIT
1523 || r_type
== R_METAG_GNU_VTENTRY
1524 || r_type
== R_METAG_NONE
)
1527 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1529 howto
= elf_metag_howto_table
+ ELF32_R_TYPE (rel
->r_info
);
1534 if (r_symndx
< symtab_hdr
->sh_info
)
1536 sym
= local_syms
+ r_symndx
;
1537 sec
= local_sections
[r_symndx
];
1538 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1540 name
= bfd_elf_string_from_elf_section
1541 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
1542 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
1546 struct elf_link_hash_entry
*eh
;
1547 bfd_boolean unresolved_reloc
, warned
, ignored
;
1549 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1550 r_symndx
, symtab_hdr
, eh_syms
,
1551 eh
, sec
, relocation
,
1552 unresolved_reloc
, warned
, ignored
);
1554 name
= eh
->root
.root
.string
;
1555 hh
= (struct elf_metag_link_hash_entry
*) eh
;
1558 if (sec
!= NULL
&& discarded_section (sec
))
1559 METAG_RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1560 rel
, relend
, howto
, contents
);
1562 if (bfd_link_relocatable (info
))
1567 case R_METAG_ADDR32
:
1568 case R_METAG_RELBRANCH
:
1569 if ((input_section
->flags
& SEC_ALLOC
) == 0)
1572 if ((bfd_link_pic (info
)
1573 && r_symndx
!= STN_UNDEF
1574 && (input_section
->flags
& SEC_ALLOC
) != 0
1575 && (r_type
!= R_METAG_RELBRANCH
1576 || !SYMBOL_CALLS_LOCAL (info
, &hh
->eh
)))
1577 || (!bfd_link_pic (info
)
1579 && hh
->eh
.dynindx
!= -1
1580 && !hh
->eh
.non_got_ref
1581 && ((hh
->eh
.def_dynamic
1582 && !hh
->eh
.def_regular
)
1583 || hh
->eh
.root
.type
== bfd_link_hash_undefweak
1584 || hh
->eh
.root
.type
== bfd_link_hash_undefined
)))
1586 Elf_Internal_Rela outrel
;
1587 bfd_boolean skip
, relocate
;
1590 /* When generating a shared object, these relocations
1591 are copied into the output file to be resolved at run
1594 sreloc
= elf_section_data (input_section
)->sreloc
;
1595 BFD_ASSERT (sreloc
!= NULL
);
1600 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
1604 if (outrel
.r_offset
== (bfd_vma
) -1)
1606 else if (outrel
.r_offset
== (bfd_vma
) -2)
1607 skip
= TRUE
, relocate
= TRUE
;
1608 outrel
.r_offset
+= (input_section
->output_section
->vma
1609 + input_section
->output_offset
);
1613 memset (&outrel
, 0, sizeof outrel
);
1614 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_NONE
);
1616 else if (r_type
== R_METAG_RELBRANCH
)
1618 BFD_ASSERT (hh
!= NULL
&& hh
->eh
.dynindx
!= -1);
1619 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1620 outrel
.r_addend
= rel
->r_addend
;
1624 /* h->dynindx may be -1 if this symbol was marked to
1627 || ((info
->symbolic
|| hh
->eh
.dynindx
== -1)
1628 && hh
->eh
.def_regular
))
1631 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1632 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1636 BFD_ASSERT (hh
->eh
.dynindx
!= -1);
1637 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1638 outrel
.r_addend
= rel
->r_addend
;
1642 loc
= sreloc
->contents
;
1643 loc
+= sreloc
->reloc_count
* sizeof(Elf32_External_Rela
);
1644 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,loc
);
1645 ++sreloc
->reloc_count
;
1647 /* If this reloc is against an external symbol, we do
1648 not want to fiddle with the addend. Otherwise, we
1649 need to include the symbol value so that it becomes
1650 an addend for the dynamic reloc. */
1656 case R_METAG_RELBRANCH_PLT
:
1657 /* Relocation is to the entry for this symbol in the
1658 procedure linkage table. */
1663 if (hh
->eh
.forced_local
)
1666 if (hh
->eh
.plt
.offset
== (bfd_vma
) -1 ||
1669 /* We didn't make a PLT entry for this symbol. This
1670 happens when statically linking PIC code, or when
1671 using -Bsymbolic. */
1675 relocation
= (htab
->splt
->output_section
->vma
1676 + htab
->splt
->output_offset
1677 + hh
->eh
.plt
.offset
);
1679 case R_METAG_HI16_GOTPC
:
1680 case R_METAG_LO16_GOTPC
:
1681 BFD_ASSERT (htab
->sgot
!= NULL
);
1683 relocation
= (htab
->sgot
->output_section
->vma
+
1684 htab
->sgot
->output_offset
);
1685 relocation
+= GOT_REG_OFFSET
;
1686 relocation
-= (input_section
->output_section
->vma
1687 + input_section
->output_offset
1690 case R_METAG_HI16_GOTOFF
:
1691 case R_METAG_LO16_GOTOFF
:
1692 case R_METAG_GETSET_GOTOFF
:
1693 BFD_ASSERT (htab
->sgot
!= NULL
);
1695 relocation
-= (htab
->sgot
->output_section
->vma
+
1696 htab
->sgot
->output_offset
);
1697 relocation
-= GOT_REG_OFFSET
;
1699 case R_METAG_GETSET_GOT
:
1702 bfd_boolean do_got
= 0;
1704 /* Relocation is to the entry for this symbol in the
1705 global offset table. */
1710 off
= hh
->eh
.got
.offset
;
1711 dyn
= htab
->etab
.dynamic_sections_created
;
1712 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1713 bfd_link_pic (info
),
1716 /* If we aren't going to call finish_dynamic_symbol,
1717 then we need to handle initialisation of the .got
1718 entry and create needed relocs here. Since the
1719 offset must always be a multiple of 4, we use the
1720 least significant bit to record whether we have
1721 initialised it already. */
1726 hh
->eh
.got
.offset
|= 1;
1733 /* Local symbol case. */
1734 if (local_got_offsets
== NULL
)
1737 off
= local_got_offsets
[r_symndx
];
1739 /* The offset must always be a multiple of 4. We use
1740 the least significant bit to record whether we have
1741 already generated the necessary reloc. */
1746 local_got_offsets
[r_symndx
] |= 1;
1753 if (bfd_link_pic (info
))
1755 /* Output a dynamic relocation for this GOT entry.
1756 In this case it is relative to the base of the
1757 object because the symbol index is zero. */
1758 Elf_Internal_Rela outrel
;
1760 asection
*s
= htab
->srelgot
;
1762 outrel
.r_offset
= (off
1763 + htab
->sgot
->output_offset
1764 + htab
->sgot
->output_section
->vma
);
1765 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1766 outrel
.r_addend
= relocation
;
1768 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1769 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1772 bfd_put_32 (output_bfd
, relocation
,
1773 htab
->sgot
->contents
+ off
);
1776 if (off
>= (bfd_vma
) -2)
1779 relocation
= off
- GOT_REG_OFFSET
;
1782 case R_METAG_TLS_GD
:
1783 case R_METAG_TLS_IE
:
1785 /* XXXMJF There is room here for optimisations. For example
1786 converting from GD->IE, etc. */
1791 if (htab
->sgot
== NULL
)
1798 dyn
= htab
->etab
.dynamic_sections_created
;
1800 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1801 bfd_link_pic (info
),
1803 && (!bfd_link_pic (info
)
1804 || !SYMBOL_REFERENCES_LOCAL (info
, &hh
->eh
)))
1806 indx
= hh
->eh
.dynindx
;
1808 off
= hh
->eh
.got
.offset
;
1809 tls_type
= hh
->tls_type
;
1813 /* Local symbol case. */
1814 if (local_got_offsets
== NULL
)
1817 off
= local_got_offsets
[r_symndx
];
1818 tls_type
= metag_elf_local_got_tls_type (input_bfd
) [r_symndx
];
1821 if (tls_type
== GOT_UNKNOWN
)
1828 bfd_boolean need_relocs
= FALSE
;
1829 Elf_Internal_Rela outrel
;
1830 bfd_byte
*loc
= NULL
;
1833 /* The GOT entries have not been initialized yet. Do it
1834 now, and emit any relocations. If both an IE GOT and a
1835 GD GOT are necessary, we emit the GD first. */
1837 if ((bfd_link_pic (info
) || indx
!= 0)
1839 || ELF_ST_VISIBILITY (hh
->eh
.other
) == STV_DEFAULT
1840 || hh
->eh
.root
.type
!= bfd_link_hash_undefweak
))
1843 loc
= htab
->srelgot
->contents
;
1844 /* FIXME (CAO): Should this be reloc_count++ ? */
1845 loc
+= htab
->srelgot
->reloc_count
* sizeof (Elf32_External_Rela
);
1848 if (tls_type
& GOT_TLS_GD
)
1852 outrel
.r_offset
= (cur_off
1853 + htab
->sgot
->output_section
->vma
1854 + htab
->sgot
->output_offset
);
1855 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_DTPMOD
);
1856 outrel
.r_addend
= 0;
1857 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ cur_off
);
1859 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1860 htab
->srelgot
->reloc_count
++;
1861 loc
+= sizeof (Elf32_External_Rela
);
1864 bfd_put_32 (output_bfd
, 0,
1865 htab
->sgot
->contents
+ cur_off
+ 4);
1868 bfd_put_32 (output_bfd
, 0,
1869 htab
->sgot
->contents
+ cur_off
+ 4);
1870 outrel
.r_info
= ELF32_R_INFO (indx
,
1871 R_METAG_TLS_DTPOFF
);
1872 outrel
.r_offset
+= 4;
1873 bfd_elf32_swap_reloca_out (output_bfd
,
1875 htab
->srelgot
->reloc_count
++;
1876 loc
+= sizeof (Elf32_External_Rela
);
1881 /* We don't support changing the TLS model. */
1888 if (tls_type
& GOT_TLS_IE
)
1892 outrel
.r_offset
= (cur_off
1893 + htab
->sgot
->output_section
->vma
1894 + htab
->sgot
->output_offset
);
1895 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_TPOFF
);
1898 outrel
.r_addend
= relocation
- dtpoff_base (info
);
1900 outrel
.r_addend
= 0;
1902 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1903 htab
->srelgot
->reloc_count
++;
1904 loc
+= sizeof (Elf32_External_Rela
);
1907 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
1908 htab
->sgot
->contents
+ cur_off
);
1914 hh
->eh
.got
.offset
|= 1;
1916 local_got_offsets
[r_symndx
] |= 1;
1919 /* Add the base of the GOT to the relocation value. */
1920 relocation
= off
- GOT_REG_OFFSET
;
1925 case R_METAG_TLS_IENONPIC_HI16
:
1926 case R_METAG_TLS_IENONPIC_LO16
:
1927 case R_METAG_TLS_LE_HI16
:
1928 case R_METAG_TLS_LE_LO16
:
1929 if (bfd_link_pic (info
))
1931 (*_bfd_error_handler
)
1932 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1933 input_bfd
, input_section
,
1934 (long) rel
->r_offset
, howto
->name
);
1938 relocation
= tpoff (info
, relocation
);
1940 case R_METAG_TLS_LDO_HI16
:
1941 case R_METAG_TLS_LDO_LO16
:
1942 if (! bfd_link_pic (info
))
1943 relocation
= tpoff (info
, relocation
);
1945 relocation
-= dtpoff_base (info
);
1947 case R_METAG_TLS_LDM
:
1951 if (htab
->sgot
== NULL
)
1953 off
= htab
->tls_ldm_got
.offset
;
1958 Elf_Internal_Rela outrel
;
1961 outrel
.r_offset
= (off
1962 + htab
->sgot
->output_section
->vma
1963 + htab
->sgot
->output_offset
);
1965 outrel
.r_addend
= 0;
1966 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_TLS_DTPMOD
);
1967 loc
= htab
->srelgot
->contents
;
1968 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1969 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1970 htab
->tls_ldm_got
.offset
|= 1;
1973 relocation
= off
- GOT_REG_OFFSET
;
1980 r
= metag_final_link_relocate (howto
, input_bfd
, input_section
,
1981 contents
, rel
, relocation
, hh
, htab
,
1984 if (r
!= bfd_reloc_ok
)
1986 const char * msg
= (const char *) NULL
;
1990 case bfd_reloc_overflow
:
1991 r
= info
->callbacks
->reloc_overflow
1992 (info
, (hh
? &hh
->eh
.root
: NULL
), name
, howto
->name
,
1993 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1996 case bfd_reloc_undefined
:
1997 r
= info
->callbacks
->undefined_symbol
1998 (info
, name
, input_bfd
, input_section
, rel
->r_offset
,
2002 case bfd_reloc_outofrange
:
2003 msg
= _("internal error: out of range error");
2006 case bfd_reloc_notsupported
:
2007 msg
= _("internal error: unsupported relocation error");
2010 case bfd_reloc_dangerous
:
2011 msg
= _("internal error: dangerous relocation");
2015 msg
= _("internal error: unknown error");
2020 r
= info
->callbacks
->warning
2021 (info
, msg
, name
, input_bfd
, input_section
, rel
->r_offset
);
2031 /* Create the .plt and .got sections, and set up our hash table
2032 short-cuts to various dynamic sections. */
2035 elf_metag_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
2037 struct elf_metag_link_hash_table
*htab
;
2038 struct elf_link_hash_entry
*eh
;
2039 struct bfd_link_hash_entry
*bh
;
2040 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2042 /* Don't try to create the .plt and .got twice. */
2043 htab
= metag_link_hash_table (info
);
2044 if (htab
->splt
!= NULL
)
2047 /* Call the generic code to do most of the work. */
2048 if (! _bfd_elf_create_dynamic_sections (abfd
, info
))
2051 htab
->sgot
= bfd_get_linker_section (abfd
, ".got");
2055 htab
->sgotplt
= bfd_make_section_with_flags (abfd
, ".got.plt",
2056 (SEC_ALLOC
| SEC_LOAD
|
2059 SEC_LINKER_CREATED
));
2060 if (htab
->sgotplt
== NULL
2061 || !bfd_set_section_alignment (abfd
, htab
->sgotplt
, 2))
2064 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2065 section. We don't do this in the linker script because we don't want
2066 to define the symbol if we are not creating a global offset table. */
2068 if (!(_bfd_generic_link_add_one_symbol
2069 (info
, abfd
, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL
, htab
->sgot
,
2070 (bfd_vma
) 0, NULL
, FALSE
, bed
->collect
, &bh
)))
2072 eh
= (struct elf_link_hash_entry
*) bh
;
2073 eh
->def_regular
= 1;
2074 eh
->type
= STT_OBJECT
;
2075 eh
->other
= STV_HIDDEN
;
2077 if (! bfd_link_executable (info
)
2078 && ! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2081 elf_hash_table (info
)->hgot
= eh
;
2083 htab
->splt
= bfd_get_linker_section (abfd
, ".plt");
2084 htab
->srelplt
= bfd_get_linker_section (abfd
, ".rela.plt");
2086 htab
->srelgot
= bfd_get_linker_section (abfd
, ".rela.got");
2088 htab
->sdynbss
= bfd_get_linker_section (abfd
, ".dynbss");
2089 htab
->srelbss
= bfd_get_linker_section (abfd
, ".rela.bss");
2094 /* Look through the relocs for a section during the first phase, and
2095 calculate needed space in the global offset table, procedure linkage
2096 table, and dynamic reloc sections. At this point we haven't
2097 necessarily read all the input files. */
2100 elf_metag_check_relocs (bfd
*abfd
,
2101 struct bfd_link_info
*info
,
2103 const Elf_Internal_Rela
*relocs
)
2105 Elf_Internal_Shdr
*symtab_hdr
;
2106 struct elf_link_hash_entry
**eh_syms
;
2107 const Elf_Internal_Rela
*rel
;
2108 const Elf_Internal_Rela
*rel_end
;
2109 struct elf_metag_link_hash_table
*htab
;
2112 int tls_type
= GOT_UNKNOWN
, old_tls_type
= GOT_UNKNOWN
;
2114 if (bfd_link_relocatable (info
))
2117 htab
= metag_link_hash_table (info
);
2118 dynobj
= htab
->etab
.dynobj
;
2119 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2120 eh_syms
= elf_sym_hashes (abfd
);
2126 rel_end
= relocs
+ sec
->reloc_count
;
2127 for (rel
= relocs
; rel
< rel_end
; rel
++)
2130 struct elf_metag_link_hash_entry
*hh
;
2131 Elf_Internal_Sym
*isym
;
2132 unsigned long r_symndx
;
2134 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2135 r_type
= ELF32_R_TYPE (rel
->r_info
);
2136 if (r_symndx
< symtab_hdr
->sh_info
)
2138 /* A local symbol. */
2139 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2150 hh
= (struct elf_metag_link_hash_entry
*)
2151 eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
2152 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
2153 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
2154 hh
= (struct elf_metag_link_hash_entry
*) hh
->eh
.root
.u
.i
.link
;
2156 /* PR15323, ref flags aren't set for references in the same
2158 hh
->eh
.root
.non_ir_ref
= 1;
2161 /* Some relocs require a global offset table. */
2162 if (htab
->sgot
== NULL
)
2166 case R_METAG_TLS_GD
:
2167 case R_METAG_TLS_LDM
:
2168 case R_METAG_TLS_IE
:
2169 if (bfd_link_pic (info
))
2170 info
->flags
|= DF_STATIC_TLS
;
2173 case R_METAG_HI16_GOTOFF
:
2174 case R_METAG_LO16_GOTOFF
:
2175 case R_METAG_GETSET_GOTOFF
:
2176 case R_METAG_GETSET_GOT
:
2177 case R_METAG_HI16_GOTPC
:
2178 case R_METAG_LO16_GOTPC
:
2180 htab
->etab
.dynobj
= dynobj
= abfd
;
2181 if (!elf_metag_create_dynamic_sections (dynobj
, info
))
2192 case R_METAG_TLS_IE
:
2193 case R_METAG_TLS_GD
:
2194 case R_METAG_GETSET_GOT
:
2198 tls_type
= GOT_NORMAL
;
2200 case R_METAG_TLS_IE
:
2201 tls_type
= GOT_TLS_IE
;
2203 case R_METAG_TLS_GD
:
2204 tls_type
= GOT_TLS_GD
;
2210 hh
->eh
.got
.refcount
+= 1;
2211 old_tls_type
= hh
->tls_type
;
2215 bfd_signed_vma
*local_got_refcounts
;
2217 /* This is a global offset table entry for a local
2219 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2220 if (local_got_refcounts
== NULL
)
2224 size
= symtab_hdr
->sh_info
;
2225 size
*= sizeof (bfd_signed_vma
);
2226 /* Add in space to store the local GOT TLS types. */
2227 size
+= symtab_hdr
->sh_info
;
2228 local_got_refcounts
= ((bfd_signed_vma
*)
2229 bfd_zalloc (abfd
, size
));
2230 if (local_got_refcounts
== NULL
)
2232 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2233 memset (metag_elf_local_got_tls_type (abfd
),
2234 GOT_UNKNOWN
, symtab_hdr
->sh_info
);
2236 local_got_refcounts
[r_symndx
] += 1;
2237 old_tls_type
= metag_elf_local_got_tls_type (abfd
) [r_symndx
];
2240 if (old_tls_type
!= tls_type
)
2244 hh
->tls_type
= tls_type
;
2248 metag_elf_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2254 case R_METAG_TLS_LDM
:
2255 metag_link_hash_table (info
)->tls_ldm_got
.refcount
+= 1;
2258 case R_METAG_RELBRANCH_PLT
:
2259 /* This symbol requires a procedure linkage table entry. We
2260 actually build the entry in adjust_dynamic_symbol,
2261 because this might be a case of linking PIC code without
2262 linking in any dynamic objects, in which case we don't
2263 need to generate a procedure linkage table after all. */
2265 /* If this is a local symbol, we resolve it directly without
2266 creating a procedure linkage table entry. */
2270 if (hh
->eh
.forced_local
)
2273 hh
->eh
.needs_plt
= 1;
2274 hh
->eh
.plt
.refcount
+= 1;
2277 case R_METAG_HIADDR16
:
2278 case R_METAG_LOADDR16
:
2279 /* Let's help debug shared library creation. These relocs
2280 cannot be used in shared libs. Don't error out for
2281 sections we don't care about, such as debug sections or
2282 non-constant sections. */
2283 if (bfd_link_pic (info
)
2284 && (sec
->flags
& SEC_ALLOC
) != 0
2285 && (sec
->flags
& SEC_READONLY
) != 0)
2290 name
= hh
->eh
.root
.root
.string
;
2292 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
2293 (*_bfd_error_handler
)
2294 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2295 abfd
, elf_metag_howto_table
[r_type
].name
, name
);
2296 bfd_set_error (bfd_error_bad_value
);
2301 case R_METAG_ADDR32
:
2302 case R_METAG_RELBRANCH
:
2303 case R_METAG_GETSETOFF
:
2304 if (hh
!= NULL
&& !bfd_link_pic (info
))
2306 hh
->eh
.non_got_ref
= 1;
2307 hh
->eh
.plt
.refcount
+= 1;
2310 /* If we are creating a shared library, and this is a reloc
2311 against a global symbol, or a non PC relative reloc
2312 against a local symbol, then we need to copy the reloc
2313 into the shared library. However, if we are linking with
2314 -Bsymbolic, we do not need to copy a reloc against a
2315 global symbol which is defined in an object we are
2316 including in the link (i.e., DEF_REGULAR is set). At
2317 this point we have not seen all the input files, so it is
2318 possible that DEF_REGULAR is not set now but will be set
2319 later (it is never cleared). We account for that
2320 possibility below by storing information in the
2321 dyn_relocs field of the hash table entry. A similar
2322 situation occurs when creating shared libraries and symbol
2323 visibility changes render the symbol local.
2325 If on the other hand, we are creating an executable, we
2326 may need to keep relocations for symbols satisfied by a
2327 dynamic library if we manage to avoid copy relocs for the
2329 if ((bfd_link_pic (info
)
2330 && (sec
->flags
& SEC_ALLOC
) != 0
2331 && (r_type
!= R_METAG_RELBRANCH
2333 && (! info
->symbolic
2334 || hh
->eh
.root
.type
== bfd_link_hash_defweak
2335 || !hh
->eh
.def_regular
))))
2336 || (!bfd_link_pic (info
)
2337 && (sec
->flags
& SEC_ALLOC
) != 0
2339 && (hh
->eh
.root
.type
== bfd_link_hash_defweak
2340 || !hh
->eh
.def_regular
)))
2342 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2343 struct elf_metag_dyn_reloc_entry
**hdh_head
;
2346 htab
->etab
.dynobj
= dynobj
= abfd
;
2348 /* When creating a shared object, we must copy these
2349 relocs into the output file. We create a reloc
2350 section in dynobj and make room for the reloc. */
2353 sreloc
= _bfd_elf_make_dynamic_reloc_section
2354 (sec
, htab
->etab
.dynobj
, 2, abfd
, /*rela?*/ TRUE
);
2358 bfd_set_error (bfd_error_bad_value
);
2362 elf_section_data (sec
)->sreloc
= sreloc
;
2365 /* If this is a global symbol, we count the number of
2366 relocations we need for this symbol. */
2368 hdh_head
= &((struct elf_metag_link_hash_entry
*) hh
)->dyn_relocs
;
2371 /* Track dynamic relocs needed for local syms too. */
2375 sr
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2379 vpp
= &elf_section_data (sr
)->local_dynrel
;
2380 hdh_head
= (struct elf_metag_dyn_reloc_entry
**) vpp
;
2384 if (hdh_p
== NULL
|| hdh_p
->sec
!= sec
)
2386 hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2387 bfd_alloc (dynobj
, sizeof *hdh_p
));
2390 hdh_p
->hdh_next
= *hdh_head
;
2394 hdh_p
->relative_count
= 0;
2398 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
2399 hdh_p
->relative_count
+= 1;
2403 /* This relocation describes the C++ object vtable hierarchy.
2404 Reconstruct it for later use during GC. */
2405 case R_METAG_GNU_VTINHERIT
:
2406 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, &hh
->eh
,
2411 /* This relocation describes which C++ vtable entries are actually
2412 used. Record for later use during GC. */
2413 case R_METAG_GNU_VTENTRY
:
2414 BFD_ASSERT (hh
!= NULL
);
2416 && !bfd_elf_gc_record_vtentry (abfd
, sec
, &hh
->eh
, rel
->r_addend
))
2425 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2428 elf_metag_copy_indirect_symbol (struct bfd_link_info
*info
,
2429 struct elf_link_hash_entry
*eh_dir
,
2430 struct elf_link_hash_entry
*eh_ind
)
2432 struct elf_metag_link_hash_entry
*hh_dir
, *hh_ind
;
2434 hh_dir
= metag_elf_hash_entry (eh_dir
);
2435 hh_ind
= metag_elf_hash_entry (eh_ind
);
2437 if (hh_ind
->dyn_relocs
!= NULL
)
2439 if (hh_dir
->dyn_relocs
!= NULL
)
2441 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2442 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2444 if (eh_ind
->root
.type
== bfd_link_hash_indirect
)
2447 /* Add reloc counts against the weak sym to the strong sym
2448 list. Merge any entries against the same section. */
2449 for (hdh_pp
= &hh_ind
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2451 struct elf_metag_dyn_reloc_entry
*hdh_q
;
2453 for (hdh_q
= hh_dir
->dyn_relocs
; hdh_q
!= NULL
;
2454 hdh_q
= hdh_q
->hdh_next
)
2455 if (hdh_q
->sec
== hdh_p
->sec
)
2457 hdh_q
->relative_count
+= hdh_p
->relative_count
;
2458 hdh_q
->count
+= hdh_p
->count
;
2459 *hdh_pp
= hdh_p
->hdh_next
;
2463 hdh_pp
= &hdh_p
->hdh_next
;
2465 *hdh_pp
= hh_dir
->dyn_relocs
;
2468 hh_dir
->dyn_relocs
= hh_ind
->dyn_relocs
;
2469 hh_ind
->dyn_relocs
= NULL
;
2472 if (eh_ind
->root
.type
== bfd_link_hash_indirect
2473 && eh_dir
->got
.refcount
<= 0)
2475 hh_dir
->tls_type
= hh_ind
->tls_type
;
2476 hh_ind
->tls_type
= GOT_UNKNOWN
;
2479 _bfd_elf_link_hash_copy_indirect (info
, eh_dir
, eh_ind
);
2482 /* Adjust a symbol defined by a dynamic object and referenced by a
2483 regular object. The current definition is in some section of the
2484 dynamic object, but we're not including those sections. We have to
2485 change the definition to something the rest of the link can
2489 elf_metag_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2490 struct elf_link_hash_entry
*eh
)
2492 struct elf_metag_link_hash_table
*htab
;
2493 struct elf_metag_link_hash_entry
*hh
;
2494 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2497 /* If this is a function, put it in the procedure linkage table. We
2498 will fill in the contents of the procedure linkage table later,
2499 when we know the address of the .got section. */
2500 if (eh
->type
== STT_FUNC
2503 if (eh
->plt
.refcount
<= 0
2504 || SYMBOL_CALLS_LOCAL (info
, eh
)
2505 || (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
2506 && eh
->root
.type
== bfd_link_hash_undefweak
))
2508 /* This case can occur if we saw a PLT reloc in an input
2509 file, but the symbol was never referred to by a dynamic
2510 object. In such a case, we don't actually need to build
2511 a procedure linkage table, and we can just do a PCREL
2513 eh
->plt
.offset
= (bfd_vma
) -1;
2520 eh
->plt
.offset
= (bfd_vma
) -1;
2522 /* If this is a weak symbol, and there is a real definition, the
2523 processor independent code will have arranged for us to see the
2524 real definition first, and we can just use the same value. */
2525 if (eh
->u
.weakdef
!= NULL
)
2527 if (eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defined
2528 && eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defweak
)
2530 eh
->root
.u
.def
.section
= eh
->u
.weakdef
->root
.u
.def
.section
;
2531 eh
->root
.u
.def
.value
= eh
->u
.weakdef
->root
.u
.def
.value
;
2532 eh
->non_got_ref
= eh
->u
.weakdef
->non_got_ref
;
2536 /* This is a reference to a symbol defined by a dynamic object which
2537 is not a function. */
2539 /* If we are creating a shared library, we must presume that the
2540 only references to the symbol are via the global offset table.
2541 For such cases we need not do anything here; the relocations will
2542 be handled correctly by relocate_section. */
2543 if (bfd_link_pic (info
))
2546 /* If there are no references to this symbol that do not use the
2547 GOT, we don't need to generate a copy reloc. */
2548 if (!eh
->non_got_ref
)
2551 /* If -z nocopyreloc was given, we won't generate them either. */
2552 if (info
->nocopyreloc
)
2554 eh
->non_got_ref
= 0;
2558 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2559 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2561 s
= hdh_p
->sec
->output_section
;
2562 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2566 /* If we didn't find any dynamic relocs in read-only sections, then
2567 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2570 eh
->non_got_ref
= 0;
2574 /* We must allocate the symbol in our .dynbss section, which will
2575 become part of the .bss section of the executable. There will be
2576 an entry for this symbol in the .dynsym section. The dynamic
2577 object will contain position independent code, so all references
2578 from the dynamic object to this symbol will go through the global
2579 offset table. The dynamic linker will use the .dynsym entry to
2580 determine the address it must put in the global offset table, so
2581 both the dynamic object and the regular object will refer to the
2582 same memory location for the variable. */
2584 htab
= metag_link_hash_table (info
);
2586 /* We must generate a COPY reloc to tell the dynamic linker to
2587 copy the initial value out of the dynamic object and into the
2588 runtime process image. */
2589 if ((eh
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && eh
->size
!= 0)
2591 htab
->srelbss
->size
+= sizeof (Elf32_External_Rela
);
2597 return _bfd_elf_adjust_dynamic_copy (info
, eh
, s
);
2600 /* Allocate space in .plt, .got and associated reloc sections for
2604 allocate_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2606 struct bfd_link_info
*info
;
2607 struct elf_metag_link_hash_table
*htab
;
2608 struct elf_metag_link_hash_entry
*hh
;
2609 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2611 if (eh
->root
.type
== bfd_link_hash_indirect
)
2614 if (eh
->root
.type
== bfd_link_hash_warning
)
2615 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2618 htab
= metag_link_hash_table (info
);
2620 if (htab
->etab
.dynamic_sections_created
2621 && eh
->plt
.refcount
> 0)
2623 /* Make sure this symbol is output as a dynamic symbol.
2624 Undefined weak syms won't yet be marked as dynamic. */
2625 if (eh
->dynindx
== -1
2626 && !eh
->forced_local
)
2628 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2632 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), eh
))
2634 asection
*s
= htab
->splt
;
2636 /* If this is the first .plt entry, make room for the special
2639 s
->size
+= PLT_ENTRY_SIZE
;
2641 eh
->plt
.offset
= s
->size
;
2643 /* If this symbol is not defined in a regular file, and we are
2644 not generating a shared library, then set the symbol to this
2645 location in the .plt. This is required to make function
2646 pointers compare as equal between the normal executable and
2647 the shared library. */
2648 if (! bfd_link_pic (info
)
2649 && !eh
->def_regular
)
2651 eh
->root
.u
.def
.section
= s
;
2652 eh
->root
.u
.def
.value
= eh
->plt
.offset
;
2655 /* Make room for this entry. */
2656 s
->size
+= PLT_ENTRY_SIZE
;
2658 /* We also need to make an entry in the .got.plt section, which
2659 will be placed in the .got section by the linker script. */
2660 htab
->sgotplt
->size
+= 4;
2662 /* We also need to make an entry in the .rel.plt section. */
2663 htab
->srelplt
->size
+= sizeof (Elf32_External_Rela
);
2667 eh
->plt
.offset
= (bfd_vma
) -1;
2673 eh
->plt
.offset
= (bfd_vma
) -1;
2677 if (eh
->got
.refcount
> 0)
2681 int tls_type
= metag_elf_hash_entry (eh
)->tls_type
;
2683 /* Make sure this symbol is output as a dynamic symbol.
2684 Undefined weak syms won't yet be marked as dynamic. */
2685 if (eh
->dynindx
== -1
2686 && !eh
->forced_local
)
2688 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2694 eh
->got
.offset
= s
->size
;
2696 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2697 if (tls_type
== GOT_TLS_GD
)
2699 dyn
= htab
->etab
.dynamic_sections_created
;
2700 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2701 R_METAG_TLS_GD needs one if local symbol and two if global. */
2702 if ((tls_type
== GOT_TLS_GD
&& eh
->dynindx
== -1)
2703 || (tls_type
== GOT_TLS_IE
&& dyn
))
2704 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2705 else if (tls_type
== GOT_TLS_GD
)
2706 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rela
);
2707 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2708 bfd_link_pic (info
),
2710 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2713 eh
->got
.offset
= (bfd_vma
) -1;
2715 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2716 if (hh
->dyn_relocs
== NULL
)
2719 /* If this is a -Bsymbolic shared link, then we need to discard all
2720 space allocated for dynamic pc-relative relocs against symbols
2721 defined in a regular object. For the normal shared case, discard
2722 space for relocs that have become local due to symbol visibility
2724 if (bfd_link_pic (info
))
2726 if (SYMBOL_CALLS_LOCAL (info
, eh
))
2728 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2730 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2732 hdh_p
->count
-= hdh_p
->relative_count
;
2733 hdh_p
->relative_count
= 0;
2734 if (hdh_p
->count
== 0)
2735 *hdh_pp
= hdh_p
->hdh_next
;
2737 hdh_pp
= &hdh_p
->hdh_next
;
2741 /* Also discard relocs on undefined weak syms with non-default
2743 if (hh
->dyn_relocs
!= NULL
2744 && eh
->root
.type
== bfd_link_hash_undefweak
)
2746 if (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
)
2747 hh
->dyn_relocs
= NULL
;
2749 /* Make sure undefined weak symbols are output as a dynamic
2751 else if (eh
->dynindx
== -1
2752 && !eh
->forced_local
)
2754 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2761 /* For the non-shared case, discard space for relocs against
2762 symbols which turn out to need copy relocs or are not
2764 if (!eh
->non_got_ref
2765 && ((eh
->def_dynamic
2766 && !eh
->def_regular
)
2767 || (htab
->etab
.dynamic_sections_created
2768 && (eh
->root
.type
== bfd_link_hash_undefweak
2769 || eh
->root
.type
== bfd_link_hash_undefined
))))
2771 /* Make sure this symbol is output as a dynamic symbol.
2772 Undefined weak syms won't yet be marked as dynamic. */
2773 if (eh
->dynindx
== -1
2774 && !eh
->forced_local
)
2776 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2780 /* If that succeeded, we know we'll be keeping all the
2782 if (eh
->dynindx
!= -1)
2786 hh
->dyn_relocs
= NULL
;
2792 /* Finally, allocate space. */
2793 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2795 asection
*sreloc
= elf_section_data (hdh_p
->sec
)->sreloc
;
2796 sreloc
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2802 /* Find any dynamic relocs that apply to read-only sections. */
2805 readonly_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2807 struct elf_metag_link_hash_entry
*hh
;
2808 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2810 if (eh
->root
.type
== bfd_link_hash_warning
)
2811 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2813 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2814 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2816 asection
*s
= hdh_p
->sec
->output_section
;
2818 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2820 struct bfd_link_info
*info
= inf
;
2822 info
->flags
|= DF_TEXTREL
;
2824 /* Not an error, just cut short the traversal. */
2831 /* Set the sizes of the dynamic sections. */
2834 elf_metag_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2835 struct bfd_link_info
*info
)
2837 struct elf_metag_link_hash_table
*htab
;
2843 htab
= metag_link_hash_table (info
);
2844 dynobj
= htab
->etab
.dynobj
;
2848 if (htab
->etab
.dynamic_sections_created
)
2850 /* Set the contents of the .interp section to the interpreter. */
2851 if (bfd_link_executable (info
) && !info
->nointerp
)
2853 s
= bfd_get_linker_section (dynobj
, ".interp");
2856 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2857 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2861 /* Set up .got offsets for local syms, and space for local dynamic
2863 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2865 bfd_signed_vma
*local_got
;
2866 bfd_signed_vma
*end_local_got
;
2867 bfd_size_type locsymcount
;
2868 Elf_Internal_Shdr
*symtab_hdr
;
2870 char *local_tls_type
;
2872 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2875 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2877 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2879 for (hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2880 elf_section_data (s
)->local_dynrel
);
2882 hdh_p
= hdh_p
->hdh_next
)
2884 if (!bfd_is_abs_section (hdh_p
->sec
)
2885 && bfd_is_abs_section (hdh_p
->sec
->output_section
))
2887 /* Input section has been discarded, either because
2888 it is a copy of a linkonce section or due to
2889 linker script /DISCARD/, so we'll be discarding
2892 else if (hdh_p
->count
!= 0)
2894 srel
= elf_section_data (hdh_p
->sec
)->sreloc
;
2895 srel
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2896 if ((hdh_p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2897 info
->flags
|= DF_TEXTREL
;
2902 local_got
= elf_local_got_refcounts (ibfd
);
2906 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2907 locsymcount
= symtab_hdr
->sh_info
;
2908 end_local_got
= local_got
+ locsymcount
;
2909 local_tls_type
= metag_elf_local_got_tls_type (ibfd
);
2911 srel
= htab
->srelgot
;
2912 for (; local_got
< end_local_got
; ++local_got
)
2916 *local_got
= s
->size
;
2917 s
->size
+= GOT_ENTRY_SIZE
;
2918 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2919 if (*local_tls_type
== GOT_TLS_GD
)
2921 if (bfd_link_pic (info
))
2922 srel
->size
+= sizeof (Elf32_External_Rela
);
2925 *local_got
= (bfd_vma
) -1;
2930 if (htab
->tls_ldm_got
.refcount
> 0)
2932 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2934 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2935 htab
->sgot
->size
+= 8;
2936 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2939 htab
->tls_ldm_got
.offset
= -1;
2941 /* Allocate global sym .plt and .got entries, and space for global
2942 sym dynamic relocs. */
2943 elf_link_hash_traverse (&htab
->etab
, allocate_dynrelocs
, info
);
2945 /* We now have determined the sizes of the various dynamic sections.
2946 Allocate memory for them. */
2948 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2950 bfd_boolean reloc_section
= FALSE
;
2952 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2957 || s
== htab
->sgotplt
2958 || s
== htab
->sdynbss
)
2960 /* Strip this section if we don't need it; see the
2963 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2965 if (s
->size
!= 0 && s
!= htab
->srelplt
)
2968 /* We use the reloc_count field as a counter if we need
2969 to copy relocs into the output file. */
2971 reloc_section
= TRUE
;
2975 /* It's not one of our sections, so don't allocate space. */
2981 /* If we don't need this section, strip it from the
2982 output file. This is mostly to handle .rela.bss and
2983 .rela.plt. We must create both sections in
2984 create_dynamic_sections, because they must be created
2985 before the linker maps input sections to output
2986 sections. The linker does that before
2987 adjust_dynamic_symbol is called, and it is that
2988 function which decides whether anything needs to go
2989 into these sections. */
2990 s
->flags
|= SEC_EXCLUDE
;
2994 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2997 /* Allocate memory for the section contents. */
2998 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2999 if (s
->contents
== NULL
)
3001 else if (reloc_section
)
3003 unsigned char *contents
= s
->contents
;
3004 Elf32_External_Rela reloc
;
3006 /* Fill the reloc section with a R_METAG_NONE type reloc. */
3007 memset(&reloc
, 0, sizeof(Elf32_External_Rela
));
3008 reloc
.r_info
[0] = R_METAG_NONE
;
3009 for (; contents
< (s
->contents
+ s
->size
);
3010 contents
+= sizeof(Elf32_External_Rela
))
3012 memcpy(contents
, &reloc
, sizeof(Elf32_External_Rela
));
3017 if (htab
->etab
.dynamic_sections_created
)
3019 /* Add some entries to the .dynamic section. We fill in the
3020 values later, in elf_metag_finish_dynamic_sections, but we
3021 must add the entries now so that we get the correct size for
3022 the .dynamic section. The DT_DEBUG entry is filled in by the
3023 dynamic linker and used by the debugger. */
3024 #define add_dynamic_entry(TAG, VAL) \
3025 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3027 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3030 if (bfd_link_executable (info
))
3032 if (!add_dynamic_entry (DT_DEBUG
, 0))
3036 if (htab
->srelplt
->size
!= 0)
3038 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3039 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3040 || !add_dynamic_entry (DT_JMPREL
, 0))
3046 if (!add_dynamic_entry (DT_RELA
, 0)
3047 || !add_dynamic_entry (DT_RELASZ
, 0)
3048 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3051 /* If any dynamic relocs apply to a read-only section,
3052 then we need a DT_TEXTREL entry. */
3053 if ((info
->flags
& DF_TEXTREL
) == 0)
3054 elf_link_hash_traverse (&htab
->etab
, readonly_dynrelocs
, info
);
3056 if ((info
->flags
& DF_TEXTREL
) != 0)
3058 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3063 #undef add_dynamic_entry
3068 /* Finish up dynamic symbol handling. We set the contents of various
3069 dynamic sections here. */
3072 elf_metag_finish_dynamic_symbol (bfd
*output_bfd
,
3073 struct bfd_link_info
*info
,
3074 struct elf_link_hash_entry
*eh
,
3075 Elf_Internal_Sym
*sym
)
3077 struct elf_metag_link_hash_table
*htab
;
3078 Elf_Internal_Rela rel
;
3081 htab
= metag_link_hash_table (info
);
3083 if (eh
->plt
.offset
!= (bfd_vma
) -1)
3093 if (eh
->plt
.offset
& 1)
3096 BFD_ASSERT (eh
->dynindx
!= -1);
3099 sgot
= htab
->sgotplt
;
3100 srela
= htab
->srelplt
;
3101 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
3103 /* Get the index in the procedure linkage table which
3104 corresponds to this symbol. This is the index of this symbol
3105 in all the symbols for which we are making plt entries. The
3106 first entry in the procedure linkage table is reserved. */
3107 plt_index
= eh
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3109 /* Get the offset into the .got.plt table of the entry that
3110 corresponds to this function. */
3111 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3113 BFD_ASSERT (got_offset
< (1 << 16));
3115 got_entry
= sgot
->output_section
->vma
3116 + sgot
->output_offset
3119 BFD_ASSERT (plt_index
< (1 << 16));
3121 /* Fill in the entry in the procedure linkage table. */
3122 if (! bfd_link_pic (info
))
3124 bfd_put_32 (output_bfd
,
3126 | (((got_entry
>> 16) & 0xffff) << 3)),
3127 splt
->contents
+ eh
->plt
.offset
);
3128 bfd_put_32 (output_bfd
,
3130 | ((got_entry
& 0xffff) << 3)),
3131 splt
->contents
+ eh
->plt
.offset
+ 4);
3132 bfd_put_32 (output_bfd
, plt_entry
[2],
3133 splt
->contents
+ eh
->plt
.offset
+ 8);
3134 bfd_put_32 (output_bfd
,
3135 (plt_entry
[3] | (plt_index
<< 3)),
3136 splt
->contents
+ eh
->plt
.offset
+ 12);
3137 bfd_put_32 (output_bfd
,
3139 | ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3140 splt
->contents
+ eh
->plt
.offset
+ 16);
3144 bfd_vma addr
= got_entry
- (splt
->output_section
->vma
+
3145 splt
->output_offset
+ eh
->plt
.offset
);
3147 bfd_put_32 (output_bfd
,
3148 plt_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3149 splt
->contents
+ eh
->plt
.offset
);
3150 bfd_put_32 (output_bfd
,
3151 plt_pic_entry
[1] | ((addr
& 0xffff) << 3),
3152 splt
->contents
+ eh
->plt
.offset
+ 4);
3153 bfd_put_32 (output_bfd
, plt_pic_entry
[2],
3154 splt
->contents
+ eh
->plt
.offset
+ 8);
3155 bfd_put_32 (output_bfd
,
3156 (plt_pic_entry
[3] | (plt_index
<< 3)),
3157 splt
->contents
+ eh
->plt
.offset
+ 12);
3158 bfd_put_32 (output_bfd
,
3160 + ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3161 splt
->contents
+ eh
->plt
.offset
+ 16);
3164 /* Fill in the entry in the global offset table. */
3165 bfd_put_32 (output_bfd
,
3166 (splt
->output_section
->vma
3167 + splt
->output_offset
3169 + 12), /* offset within PLT entry */
3170 sgot
->contents
+ got_offset
);
3172 /* Fill in the entry in the .rela.plt section. */
3173 rel
.r_offset
= (sgot
->output_section
->vma
3174 + sgot
->output_offset
3176 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_JMP_SLOT
);
3178 loc
= htab
->srelplt
->contents
;
3179 loc
+= plt_index
* sizeof(Elf32_External_Rela
);
3180 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3182 if (!eh
->def_regular
)
3184 /* Mark the symbol as undefined, rather than as defined in
3185 the .plt section. Leave the value alone. */
3186 sym
->st_shndx
= SHN_UNDEF
;
3190 if (eh
->got
.offset
!= (bfd_vma
) -1
3191 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_GD
) == 0
3192 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_IE
) == 0)
3194 /* This symbol has an entry in the global offset table. Set it
3197 rel
.r_offset
= ((eh
->got
.offset
&~ (bfd_vma
) 1)
3198 + htab
->sgot
->output_offset
3199 + htab
->sgot
->output_section
->vma
);
3201 /* If this is a -Bsymbolic link and the symbol is defined
3202 locally or was forced to be local because of a version file,
3203 we just want to emit a RELATIVE reloc. The entry in the
3204 global offset table will already have been initialized in the
3205 relocate_section function. */
3206 if (bfd_link_pic (info
)
3207 && (info
->symbolic
|| eh
->dynindx
== -1)
3210 rel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
3211 rel
.r_addend
= (eh
->root
.u
.def
.value
3212 + eh
->root
.u
.def
.section
->output_offset
3213 + eh
->root
.u
.def
.section
->output_section
->vma
);
3217 if ((eh
->got
.offset
& 1) != 0)
3219 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ eh
->got
.offset
);
3220 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_GLOB_DAT
);
3224 loc
= htab
->srelgot
->contents
;
3225 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3226 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3233 /* This symbol needs a copy reloc. Set it up. */
3235 if (! (eh
->dynindx
!= -1
3236 && (eh
->root
.type
== bfd_link_hash_defined
3237 || eh
->root
.type
== bfd_link_hash_defweak
)))
3242 rel
.r_offset
= (eh
->root
.u
.def
.value
3243 + eh
->root
.u
.def
.section
->output_offset
3244 + eh
->root
.u
.def
.section
->output_section
->vma
);
3246 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_COPY
);
3247 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3248 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3251 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3252 if (eh
->root
.root
.string
[0] == '_'
3253 && (strcmp (eh
->root
.root
.string
, "_DYNAMIC") == 0
3254 || eh
== htab
->etab
.hgot
))
3256 sym
->st_shndx
= SHN_ABS
;
3262 /* Set the Meta ELF ABI version. */
3265 elf_metag_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info
)
3267 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
3269 _bfd_elf_post_process_headers (abfd
, link_info
);
3270 i_ehdrp
= elf_elfheader (abfd
);
3271 i_ehdrp
->e_ident
[EI_ABIVERSION
] = METAG_ELF_ABI_VERSION
;
3274 /* Used to decide how to sort relocs in an optimal manner for the
3275 dynamic linker, before writing them out. */
3277 static enum elf_reloc_type_class
3278 elf_metag_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3279 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3280 const Elf_Internal_Rela
*rela
)
3282 switch ((int) ELF32_R_TYPE (rela
->r_info
))
3284 case R_METAG_RELATIVE
:
3285 return reloc_class_relative
;
3286 case R_METAG_JMP_SLOT
:
3287 return reloc_class_plt
;
3289 return reloc_class_copy
;
3291 return reloc_class_normal
;
3295 /* Finish up the dynamic sections. */
3298 elf_metag_finish_dynamic_sections (bfd
*output_bfd
,
3299 struct bfd_link_info
*info
)
3302 struct elf_metag_link_hash_table
*htab
;
3305 htab
= metag_link_hash_table (info
);
3306 dynobj
= htab
->etab
.dynobj
;
3308 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3310 if (htab
->etab
.dynamic_sections_created
)
3313 Elf32_External_Dyn
*dyncon
, *dynconend
;
3318 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3319 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3320 for (; dyncon
< dynconend
; dyncon
++)
3322 Elf_Internal_Dyn dyn
;
3325 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3334 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3335 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3340 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3341 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3346 dyn
.d_un
.d_val
= s
->size
;
3347 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3351 /* Don't count procedure linkage table relocs in the
3352 overall reloc count. */
3353 if (htab
->srelplt
) {
3355 dyn
.d_un
.d_val
-= s
->size
;
3357 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3361 /* We may not be using the standard ELF linker script.
3362 If .rela.plt is the first .rela section, we adjust
3363 DT_RELA to not include it. */
3364 if (htab
->srelplt
) {
3366 if (dyn
.d_un
.d_ptr
== s
->output_section
->vma
+ s
->output_offset
)
3367 dyn
.d_un
.d_ptr
+= s
->size
;
3369 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3375 /* Fill in the first entry in the procedure linkage table. */
3377 if (splt
&& splt
->size
> 0)
3380 /* addr = .got + 4 */
3381 addr
= htab
->sgot
->output_section
->vma
+
3382 htab
->sgot
->output_offset
+ 4;
3383 if (bfd_link_pic (info
))
3385 addr
-= splt
->output_section
->vma
+ splt
->output_offset
;
3386 bfd_put_32 (output_bfd
,
3387 plt0_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3389 bfd_put_32 (output_bfd
,
3390 plt0_pic_entry
[1] | ((addr
& 0xffff) << 3),
3391 splt
->contents
+ 4);
3392 bfd_put_32 (output_bfd
, plt0_pic_entry
[2], splt
->contents
+ 8);
3393 bfd_put_32 (output_bfd
, plt0_pic_entry
[3], splt
->contents
+ 12);
3394 bfd_put_32 (output_bfd
, plt0_pic_entry
[4], splt
->contents
+ 16);
3398 bfd_put_32 (output_bfd
,
3399 plt0_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3401 bfd_put_32 (output_bfd
,
3402 plt0_entry
[1] | ((addr
& 0xffff) << 3),
3403 splt
->contents
+ 4);
3404 bfd_put_32 (output_bfd
, plt0_entry
[2], splt
->contents
+ 8);
3405 bfd_put_32 (output_bfd
, plt0_entry
[3], splt
->contents
+ 12);
3406 bfd_put_32 (output_bfd
, plt0_entry
[4], splt
->contents
+ 16);
3409 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
=
3414 if (htab
->sgot
!= NULL
&& htab
->sgot
->size
!= 0)
3416 /* Fill in the first entry in the global offset table.
3417 We use it to point to our dynamic section, if we have one. */
3418 bfd_put_32 (output_bfd
,
3419 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0,
3420 htab
->sgot
->contents
);
3422 /* The second entry is reserved for use by the dynamic linker. */
3423 memset (htab
->sgot
->contents
+ GOT_ENTRY_SIZE
, 0, GOT_ENTRY_SIZE
);
3425 /* Set .got entry size. */
3426 elf_section_data (htab
->sgot
->output_section
)
3427 ->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3433 /* Return the section that should be marked against GC for a given
3437 elf_metag_gc_mark_hook (asection
*sec
,
3438 struct bfd_link_info
*info
,
3439 Elf_Internal_Rela
*rela
,
3440 struct elf_link_hash_entry
*hh
,
3441 Elf_Internal_Sym
*sym
)
3444 switch ((unsigned int) ELF32_R_TYPE (rela
->r_info
))
3446 case R_METAG_GNU_VTINHERIT
:
3447 case R_METAG_GNU_VTENTRY
:
3451 return _bfd_elf_gc_mark_hook (sec
, info
, rela
, hh
, sym
);
3454 /* Update the got and plt entry reference counts for the section being
3458 elf_metag_gc_sweep_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
3459 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3460 asection
*sec ATTRIBUTE_UNUSED
,
3461 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
3463 Elf_Internal_Shdr
*symtab_hdr
;
3464 struct elf_link_hash_entry
**eh_syms
;
3465 bfd_signed_vma
*local_got_refcounts
;
3466 bfd_signed_vma
*local_plt_refcounts
;
3467 const Elf_Internal_Rela
*rel
, *relend
;
3469 if (bfd_link_relocatable (info
))
3472 elf_section_data (sec
)->local_dynrel
= NULL
;
3474 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3475 eh_syms
= elf_sym_hashes (abfd
);
3476 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3477 local_plt_refcounts
= local_got_refcounts
;
3478 if (local_plt_refcounts
!= NULL
)
3479 local_plt_refcounts
+= symtab_hdr
->sh_info
;
3481 relend
= relocs
+ sec
->reloc_count
;
3482 for (rel
= relocs
; rel
< relend
; rel
++)
3484 unsigned long r_symndx
;
3485 unsigned int r_type
;
3486 struct elf_link_hash_entry
*eh
= NULL
;
3488 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3489 if (r_symndx
>= symtab_hdr
->sh_info
)
3491 struct elf_metag_link_hash_entry
*hh
;
3492 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3493 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3495 eh
= eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
3496 while (eh
->root
.type
== bfd_link_hash_indirect
3497 || eh
->root
.type
== bfd_link_hash_warning
)
3498 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
3499 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3501 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3502 hdh_pp
= &hdh_p
->hdh_next
)
3503 if (hdh_p
->sec
== sec
)
3505 /* Everything must go for SEC. */
3506 *hdh_pp
= hdh_p
->hdh_next
;
3511 r_type
= ELF32_R_TYPE (rel
->r_info
);
3514 case R_METAG_TLS_LDM
:
3515 if (metag_link_hash_table (info
)->tls_ldm_got
.refcount
> 0)
3516 metag_link_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
3518 case R_METAG_TLS_IE
:
3519 case R_METAG_TLS_GD
:
3520 case R_METAG_GETSET_GOT
:
3523 if (eh
->got
.refcount
> 0)
3524 eh
->got
.refcount
-= 1;
3526 else if (local_got_refcounts
!= NULL
)
3528 if (local_got_refcounts
[r_symndx
] > 0)
3529 local_got_refcounts
[r_symndx
] -= 1;
3533 case R_METAG_RELBRANCH_PLT
:
3536 if (eh
->plt
.refcount
> 0)
3537 eh
->plt
.refcount
-= 1;
3541 case R_METAG_ADDR32
:
3542 case R_METAG_HIADDR16
:
3543 case R_METAG_LOADDR16
:
3544 case R_METAG_GETSETOFF
:
3545 case R_METAG_RELBRANCH
:
3548 struct elf_metag_link_hash_entry
*hh
;
3549 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3550 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3552 if (!bfd_link_pic (info
) && eh
->plt
.refcount
> 0)
3553 eh
->plt
.refcount
-= 1;
3555 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3557 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3558 hdh_pp
= &hdh_p
->hdh_next
)
3559 if (hdh_p
->sec
== sec
)
3561 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
3562 hdh_p
->relative_count
-= 1;
3564 if (hdh_p
->count
== 0)
3565 *hdh_pp
= hdh_p
->hdh_next
;
3579 /* Determine the type of stub needed, if any, for a call. */
3581 static enum elf_metag_stub_type
3582 metag_type_of_stub (asection
*input_sec
,
3583 const Elf_Internal_Rela
*rel
,
3584 struct elf_metag_link_hash_entry
*hh
,
3585 bfd_vma destination
,
3586 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3589 bfd_vma branch_offset
;
3590 bfd_vma max_branch_offset
;
3593 !(hh
->eh
.root
.type
== bfd_link_hash_defined
3594 || hh
->eh
.root
.type
== bfd_link_hash_defweak
))
3595 return metag_stub_none
;
3597 /* Determine where the call point is. */
3598 location
= (input_sec
->output_offset
3599 + input_sec
->output_section
->vma
3602 branch_offset
= destination
- location
;
3604 /* Determine if a long branch stub is needed. Meta branch offsets
3605 are signed 19 bits 4 byte aligned. */
3606 max_branch_offset
= (1 << (BRANCH_BITS
-1)) << 2;
3608 if (branch_offset
+ max_branch_offset
>= 2*max_branch_offset
)
3610 if (bfd_link_pic (info
))
3611 return metag_stub_long_branch_shared
;
3613 return metag_stub_long_branch
;
3616 return metag_stub_none
;
3619 #define MOVT_A0_3 0x82180005
3620 #define JUMP_A0_3 0xac180003
3622 #define MOVT_A1LBP 0x83080005
3623 #define ADD_A1LBP 0x83080000
3625 #define ADDT_A0_3_CPC 0x82980001
3626 #define ADD_A0_3_A0_3 0x82180000
3627 #define MOV_PC_A0_3 0xa3180ca0
3630 metag_build_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3632 struct elf_metag_stub_hash_entry
*hsh
;
3639 /* Massage our args to the form they really have. */
3640 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3642 stub_sec
= hsh
->stub_sec
;
3644 /* Make a note of the offset within the stubs for this entry. */
3645 hsh
->stub_offset
= stub_sec
->size
;
3646 loc
= stub_sec
->contents
+ hsh
->stub_offset
;
3648 stub_bfd
= stub_sec
->owner
;
3650 switch (hsh
->stub_type
)
3652 case metag_stub_long_branch_shared
:
3653 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3654 calculate the jump target using A0.3 as a temporary. Then a MOV
3655 to PC carries out the jump. */
3656 sym_value
= (hsh
->target_value
3657 + hsh
->target_section
->output_offset
3658 + hsh
->target_section
->output_section
->vma
3661 sym_value
-= (hsh
->stub_offset
3662 + stub_sec
->output_offset
3663 + stub_sec
->output_section
->vma
);
3665 bfd_put_32 (stub_bfd
, ADDT_A0_3_CPC
| (((sym_value
>> 16) & 0xffff) << 3),
3668 bfd_put_32 (stub_bfd
, ADD_A0_3_A0_3
| ((sym_value
& 0xffff) << 3),
3671 bfd_put_32 (stub_bfd
, MOV_PC_A0_3
, loc
+ 8);
3675 case metag_stub_long_branch
:
3676 /* A standard long branch stub is a MOVT instruction followed by a
3677 JUMP instruction using the A0.3 register as a temporary. This is
3678 the same method used by the LDLK linker (patch.c). */
3679 sym_value
= (hsh
->target_value
3680 + hsh
->target_section
->output_offset
3681 + hsh
->target_section
->output_section
->vma
3684 bfd_put_32 (stub_bfd
, MOVT_A0_3
| (((sym_value
>> 16) & 0xffff) << 3),
3687 bfd_put_32 (stub_bfd
, JUMP_A0_3
| ((sym_value
& 0xffff) << 3), loc
+ 4);
3696 stub_sec
->size
+= size
;
3700 /* As above, but don't actually build the stub. Just bump offset so
3701 we know stub section sizes. */
3704 metag_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3706 struct elf_metag_stub_hash_entry
*hsh
;
3709 /* Massage our args to the form they really have. */
3710 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3712 if (hsh
->stub_type
== metag_stub_long_branch
)
3714 else if (hsh
->stub_type
== metag_stub_long_branch_shared
)
3717 hsh
->stub_sec
->size
+= size
;
3721 /* Set up various things so that we can make a list of input sections
3722 for each output section included in the link. Returns -1 on error,
3723 0 when no stubs will be needed, and 1 on success. */
3726 elf_metag_setup_section_lists (bfd
*output_bfd
, struct bfd_link_info
*info
)
3729 unsigned int bfd_count
;
3730 unsigned int top_id
, top_index
;
3732 asection
**input_list
, **list
;
3734 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3736 /* Count the number of input BFDs and find the top input section id. */
3737 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3739 input_bfd
= input_bfd
->link
.next
)
3742 for (section
= input_bfd
->sections
;
3744 section
= section
->next
)
3746 if (top_id
< section
->id
)
3747 top_id
= section
->id
;
3751 htab
->bfd_count
= bfd_count
;
3753 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3754 htab
->stub_group
= bfd_zmalloc (amt
);
3755 if (htab
->stub_group
== NULL
)
3758 /* We can't use output_bfd->section_count here to find the top output
3759 section index as some sections may have been removed, and
3760 strip_excluded_output_sections doesn't renumber the indices. */
3761 for (section
= output_bfd
->sections
, top_index
= 0;
3763 section
= section
->next
)
3765 if (top_index
< section
->index
)
3766 top_index
= section
->index
;
3769 htab
->top_index
= top_index
;
3770 amt
= sizeof (asection
*) * (top_index
+ 1);
3771 input_list
= bfd_malloc (amt
);
3772 htab
->input_list
= input_list
;
3773 if (input_list
== NULL
)
3776 /* For sections we aren't interested in, mark their entries with a
3777 value we can check later. */
3778 list
= input_list
+ top_index
;
3780 *list
= bfd_abs_section_ptr
;
3781 while (list
-- != input_list
);
3783 for (section
= output_bfd
->sections
;
3785 section
= section
->next
)
3787 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3788 * have PC relative relocs in them but no code flag set. */
3789 if (((section
->flags
& SEC_CODE
) != 0) ||
3790 strcmp(".ctors", section
->name
) ||
3791 strcmp(".dtors", section
->name
))
3792 input_list
[section
->index
] = NULL
;
3798 /* The linker repeatedly calls this function for each input section,
3799 in the order that input sections are linked into output sections.
3800 Build lists of input sections to determine groupings between which
3801 we may insert linker stubs. */
3804 elf_metag_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3806 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3808 if (isec
->output_section
->index
<= htab
->top_index
)
3810 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3811 if (*list
!= bfd_abs_section_ptr
)
3813 /* Steal the link_sec pointer for our list. */
3814 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3815 /* This happens to make the list in reverse order,
3816 which is what we want. */
3817 PREV_SEC (isec
) = *list
;
3823 /* See whether we can group stub sections together. Grouping stub
3824 sections may result in fewer stubs. More importantly, we need to
3825 put all .init* and .fini* stubs at the beginning of the .init or
3826 .fini output sections respectively, because glibc splits the
3827 _init and _fini functions into multiple parts. Putting a stub in
3828 the middle of a function is not a good idea. */
3831 group_sections (struct elf_metag_link_hash_table
*htab
,
3832 bfd_size_type stub_group_size
,
3833 bfd_boolean stubs_always_before_branch
)
3835 asection
**list
= htab
->input_list
+ htab
->top_index
;
3838 asection
*tail
= *list
;
3839 if (tail
== bfd_abs_section_ptr
)
3841 while (tail
!= NULL
)
3845 bfd_size_type total
;
3846 bfd_boolean big_sec
;
3850 big_sec
= total
>= stub_group_size
;
3852 while ((prev
= PREV_SEC (curr
)) != NULL
3853 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3857 /* OK, the size from the start of CURR to the end is less
3858 than stub_group_size bytes and thus can be handled by one stub
3859 section. (or the tail section is itself larger than
3860 stub_group_size bytes, in which case we may be toast.)
3861 We should really be keeping track of the total size of
3862 stubs added here, as stubs contribute to the final output
3866 prev
= PREV_SEC (tail
);
3867 /* Set up this stub group. */
3868 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3870 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3872 /* But wait, there's more! Input sections up to stub_group_size
3873 bytes before the stub section can be handled by it too.
3874 Don't do this if we have a really large section after the
3875 stubs, as adding more stubs increases the chance that
3876 branches may not reach into the stub section. */
3877 if (!stubs_always_before_branch
&& !big_sec
)
3881 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3885 prev
= PREV_SEC (tail
);
3886 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3892 while (list
-- != htab
->input_list
);
3893 free (htab
->input_list
);
3897 /* Read in all local syms for all input bfds.
3898 Returns -1 on error, 0 otherwise. */
3901 get_local_syms (bfd
*output_bfd ATTRIBUTE_UNUSED
, bfd
*input_bfd
,
3902 struct bfd_link_info
*info
)
3904 unsigned int bfd_indx
;
3905 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
3906 int stub_changed
= 0;
3907 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3909 /* We want to read in symbol extension records only once. To do this
3910 we need to read in the local symbols in parallel and save them for
3911 later use; so hold pointers to the local symbols in an array. */
3912 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
3913 all_local_syms
= bfd_zmalloc (amt
);
3914 htab
->all_local_syms
= all_local_syms
;
3915 if (all_local_syms
== NULL
)
3918 /* Walk over all the input BFDs, swapping in local symbols. */
3921 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3923 Elf_Internal_Shdr
*symtab_hdr
;
3925 /* We'll need the symbol table in a second. */
3926 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3927 if (symtab_hdr
->sh_info
== 0)
3930 /* We need an array of the local symbols attached to the input bfd. */
3931 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3932 if (local_syms
== NULL
)
3934 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
3935 symtab_hdr
->sh_info
, 0,
3937 /* Cache them for elf_link_input_bfd. */
3938 symtab_hdr
->contents
= (unsigned char *) local_syms
;
3940 if (local_syms
== NULL
)
3943 all_local_syms
[bfd_indx
] = local_syms
;
3946 return stub_changed
;
3949 /* Determine and set the size of the stub section for a final link.
3951 The basic idea here is to examine all the relocations looking for
3952 PC-relative calls to a target that is unreachable with a "CALLR"
3955 /* See elf32-hppa.c and elf64-ppc.c. */
3958 elf_metag_size_stubs(bfd
*output_bfd
, bfd
*stub_bfd
,
3959 struct bfd_link_info
*info
,
3960 bfd_signed_vma group_size
,
3961 asection
* (*add_stub_section
) (const char *, asection
*),
3962 void (*layout_sections_again
) (void))
3964 bfd_size_type stub_group_size
;
3965 bfd_boolean stubs_always_before_branch
;
3966 bfd_boolean stub_changed
;
3967 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3969 /* Stash our params away. */
3970 htab
->stub_bfd
= stub_bfd
;
3971 htab
->add_stub_section
= add_stub_section
;
3972 htab
->layout_sections_again
= layout_sections_again
;
3973 stubs_always_before_branch
= group_size
< 0;
3975 stub_group_size
= -group_size
;
3977 stub_group_size
= group_size
;
3978 if (stub_group_size
== 1)
3980 /* Default values. */
3981 /* FIXME: not sure what these values should be */
3982 if (stubs_always_before_branch
)
3984 stub_group_size
= (1 << BRANCH_BITS
);
3988 stub_group_size
= (1 << BRANCH_BITS
);
3992 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3994 switch (get_local_syms (output_bfd
, info
->input_bfds
, info
))
3997 if (htab
->all_local_syms
)
3998 goto error_ret_free_local
;
4002 stub_changed
= FALSE
;
4006 stub_changed
= TRUE
;
4013 unsigned int bfd_indx
;
4016 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4018 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
4020 Elf_Internal_Shdr
*symtab_hdr
;
4022 Elf_Internal_Sym
*local_syms
;
4024 /* We'll need the symbol table in a second. */
4025 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4026 if (symtab_hdr
->sh_info
== 0)
4029 local_syms
= htab
->all_local_syms
[bfd_indx
];
4031 /* Walk over each section attached to the input bfd. */
4032 for (section
= input_bfd
->sections
;
4034 section
= section
->next
)
4036 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4038 /* If there aren't any relocs, then there's nothing more
4040 if ((section
->flags
& SEC_RELOC
) == 0
4041 || section
->reloc_count
== 0)
4044 /* If this section is a link-once section that will be
4045 discarded, then don't create any stubs. */
4046 if (section
->output_section
== NULL
4047 || section
->output_section
->owner
!= output_bfd
)
4050 /* Get the relocs. */
4052 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
, NULL
,
4054 if (internal_relocs
== NULL
)
4055 goto error_ret_free_local
;
4057 /* Now examine each relocation. */
4058 irela
= internal_relocs
;
4059 irelaend
= irela
+ section
->reloc_count
;
4060 for (; irela
< irelaend
; irela
++)
4062 unsigned int r_type
, r_indx
;
4063 enum elf_metag_stub_type stub_type
;
4064 struct elf_metag_stub_hash_entry
*hsh
;
4067 bfd_vma destination
;
4068 struct elf_metag_link_hash_entry
*hh
;
4070 const asection
*id_sec
;
4072 r_type
= ELF32_R_TYPE (irela
->r_info
);
4073 r_indx
= ELF32_R_SYM (irela
->r_info
);
4075 if (r_type
>= (unsigned int) R_METAG_MAX
)
4077 bfd_set_error (bfd_error_bad_value
);
4078 error_ret_free_internal
:
4079 if (elf_section_data (section
)->relocs
== NULL
)
4080 free (internal_relocs
);
4081 goto error_ret_free_local
;
4084 /* Only look for stubs on CALLR and B instructions. */
4085 if (!(r_type
== (unsigned int) R_METAG_RELBRANCH
||
4086 r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
))
4089 /* Now determine the call target, its name, value,
4095 if (r_indx
< symtab_hdr
->sh_info
)
4097 /* It's a local symbol. */
4098 Elf_Internal_Sym
*sym
;
4099 Elf_Internal_Shdr
*hdr
;
4102 sym
= local_syms
+ r_indx
;
4103 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4104 sym_value
= sym
->st_value
;
4105 shndx
= sym
->st_shndx
;
4106 if (shndx
< elf_numsections (input_bfd
))
4108 hdr
= elf_elfsections (input_bfd
)[shndx
];
4109 sym_sec
= hdr
->bfd_section
;
4110 destination
= (sym_value
+ irela
->r_addend
4111 + sym_sec
->output_offset
4112 + sym_sec
->output_section
->vma
);
4117 /* It's an external symbol. */
4120 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4121 hh
= ((struct elf_metag_link_hash_entry
*)
4122 elf_sym_hashes (input_bfd
)[e_indx
]);
4124 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
4125 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
4126 hh
= ((struct elf_metag_link_hash_entry
*)
4127 hh
->eh
.root
.u
.i
.link
);
4129 if (hh
->eh
.root
.type
== bfd_link_hash_defined
4130 || hh
->eh
.root
.type
== bfd_link_hash_defweak
)
4132 sym_sec
= hh
->eh
.root
.u
.def
.section
;
4133 sym_value
= hh
->eh
.root
.u
.def
.value
;
4134 if (hh
->eh
.plt
.offset
!= (bfd_vma
) -1
4135 && hh
->eh
.dynindx
!= -1
4136 && r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
)
4138 sym_sec
= htab
->splt
;
4139 sym_value
= hh
->eh
.plt
.offset
;
4142 if (sym_sec
->output_section
!= NULL
)
4143 destination
= (sym_value
+ irela
->r_addend
4144 + sym_sec
->output_offset
4145 + sym_sec
->output_section
->vma
);
4149 else if (hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
4151 if (! bfd_link_pic (info
))
4154 else if (hh
->eh
.root
.type
== bfd_link_hash_undefined
)
4156 if (! (info
->unresolved_syms_in_objects
== RM_IGNORE
4157 && (ELF_ST_VISIBILITY (hh
->eh
.other
)
4163 bfd_set_error (bfd_error_bad_value
);
4164 goto error_ret_free_internal
;
4168 /* Determine what (if any) linker stub is needed. */
4169 stub_type
= metag_type_of_stub (section
, irela
, hh
,
4171 if (stub_type
== metag_stub_none
)
4174 /* Support for grouping stub sections. */
4175 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4177 /* Get the name of this stub. */
4178 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, irela
);
4180 goto error_ret_free_internal
;
4182 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
4187 /* The proper stub has already been created. */
4192 hsh
= metag_add_stub (stub_name
, section
, htab
);
4196 goto error_ret_free_internal
;
4198 hsh
->target_value
= sym_value
;
4199 hsh
->target_section
= sym_sec
;
4200 hsh
->stub_type
= stub_type
;
4202 hsh
->addend
= irela
->r_addend
;
4203 stub_changed
= TRUE
;
4206 /* We're done with the internal relocs, free them. */
4207 if (elf_section_data (section
)->relocs
== NULL
)
4208 free (internal_relocs
);
4215 /* OK, we've added some stubs. Find out the new size of the
4217 for (stub_sec
= htab
->stub_bfd
->sections
;
4219 stub_sec
= stub_sec
->next
)
4222 bfd_hash_traverse (&htab
->bstab
, metag_size_one_stub
, htab
);
4224 /* Ask the linker to do its stuff. */
4225 (*htab
->layout_sections_again
) ();
4226 stub_changed
= FALSE
;
4229 free (htab
->all_local_syms
);
4232 error_ret_free_local
:
4233 free (htab
->all_local_syms
);
4237 /* Build all the stubs associated with the current output file. The
4238 stubs are kept in a hash table attached to the main linker hash
4239 table. This function is called via metagelf_finish in the linker. */
4242 elf_metag_build_stubs (struct bfd_link_info
*info
)
4245 struct bfd_hash_table
*table
;
4246 struct elf_metag_link_hash_table
*htab
;
4248 htab
= metag_link_hash_table (info
);
4250 for (stub_sec
= htab
->stub_bfd
->sections
;
4252 stub_sec
= stub_sec
->next
)
4256 /* Allocate memory to hold the linker stubs. */
4257 size
= stub_sec
->size
;
4258 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4259 if (stub_sec
->contents
== NULL
&& size
!= 0)
4264 /* Build the stubs as directed by the stub hash table. */
4265 table
= &htab
->bstab
;
4266 bfd_hash_traverse (table
, metag_build_one_stub
, info
);
4271 /* Return TRUE if SYM represents a local label symbol. */
4274 elf_metag_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
4276 if (name
[0] == '$' && name
[1] == 'L')
4278 return _bfd_elf_is_local_label_name (abfd
, name
);
4281 /* Return address for Ith PLT stub in section PLT, for relocation REL
4282 or (bfd_vma) -1 if it should not be included. */
4285 elf_metag_plt_sym_val (bfd_vma i
, const asection
*plt
,
4286 const arelent
*rel ATTRIBUTE_UNUSED
)
4288 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4291 #define ELF_ARCH bfd_arch_metag
4292 #define ELF_TARGET_ID METAG_ELF_DATA
4293 #define ELF_MACHINE_CODE EM_METAG
4294 #define ELF_MINPAGESIZE 0x1000
4295 #define ELF_MAXPAGESIZE 0x4000
4296 #define ELF_COMMONPAGESIZE 0x1000
4298 #define TARGET_LITTLE_SYM metag_elf32_vec
4299 #define TARGET_LITTLE_NAME "elf32-metag"
4301 #define elf_symbol_leading_char '_'
4303 #define elf_info_to_howto_rel NULL
4304 #define elf_info_to_howto metag_info_to_howto_rela
4306 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4307 #define bfd_elf32_bfd_link_hash_table_create \
4308 elf_metag_link_hash_table_create
4309 #define elf_backend_relocate_section elf_metag_relocate_section
4310 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4311 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4312 #define elf_backend_check_relocs elf_metag_check_relocs
4313 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4314 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4315 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4316 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4317 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4318 #define elf_backend_omit_section_dynsym \
4319 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4320 #define elf_backend_post_process_headers elf_metag_post_process_headers
4321 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4322 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4323 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4325 #define elf_backend_can_gc_sections 1
4326 #define elf_backend_can_refcount 1
4327 #define elf_backend_got_header_size 12
4328 #define elf_backend_rela_normal 1
4329 #define elf_backend_want_got_sym 0
4330 #define elf_backend_want_plt_sym 0
4331 #define elf_backend_plt_readonly 1
4333 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4334 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4336 #include "elf32-target.h"