1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2015 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 0, /* 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
;
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 (_("%A: 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 (info->relocatable \
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 (info
->relocatable
)
1567 case R_METAG_ADDR32
:
1568 case R_METAG_RELBRANCH
:
1569 if ((input_section
->flags
& SEC_ALLOC
) == 0)
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
)))
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
, info
->shared
,
1715 /* If we aren't going to call finish_dynamic_symbol,
1716 then we need to handle initialisation of the .got
1717 entry and create needed relocs here. Since the
1718 offset must always be a multiple of 4, we use the
1719 least significant bit to record whether we have
1720 initialised it already. */
1725 hh
->eh
.got
.offset
|= 1;
1732 /* Local symbol case. */
1733 if (local_got_offsets
== NULL
)
1736 off
= local_got_offsets
[r_symndx
];
1738 /* The offset must always be a multiple of 4. We use
1739 the least significant bit to record whether we have
1740 already generated the necessary reloc. */
1745 local_got_offsets
[r_symndx
] |= 1;
1754 /* Output a dynamic relocation for this GOT entry.
1755 In this case it is relative to the base of the
1756 object because the symbol index is zero. */
1757 Elf_Internal_Rela outrel
;
1759 asection
*s
= htab
->srelgot
;
1761 outrel
.r_offset
= (off
1762 + htab
->sgot
->output_offset
1763 + htab
->sgot
->output_section
->vma
);
1764 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1765 outrel
.r_addend
= relocation
;
1767 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1768 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1771 bfd_put_32 (output_bfd
, relocation
,
1772 htab
->sgot
->contents
+ off
);
1775 if (off
>= (bfd_vma
) -2)
1778 relocation
= off
- GOT_REG_OFFSET
;
1781 case R_METAG_TLS_GD
:
1782 case R_METAG_TLS_IE
:
1784 /* XXXMJF There is room here for optimisations. For example
1785 converting from GD->IE, etc. */
1790 if (htab
->sgot
== NULL
)
1797 dyn
= htab
->etab
.dynamic_sections_created
;
1799 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, &hh
->eh
)
1801 || !SYMBOL_REFERENCES_LOCAL (info
, &hh
->eh
)))
1803 indx
= hh
->eh
.dynindx
;
1805 off
= hh
->eh
.got
.offset
;
1806 tls_type
= hh
->tls_type
;
1810 /* Local symbol case. */
1811 if (local_got_offsets
== NULL
)
1814 off
= local_got_offsets
[r_symndx
];
1815 tls_type
= metag_elf_local_got_tls_type (input_bfd
) [r_symndx
];
1818 if (tls_type
== GOT_UNKNOWN
)
1825 bfd_boolean need_relocs
= FALSE
;
1826 Elf_Internal_Rela outrel
;
1827 bfd_byte
*loc
= NULL
;
1830 /* The GOT entries have not been initialized yet. Do it
1831 now, and emit any relocations. If both an IE GOT and a
1832 GD GOT are necessary, we emit the GD first. */
1834 if ((info
->shared
|| indx
!= 0)
1836 || ELF_ST_VISIBILITY (hh
->eh
.other
) == STV_DEFAULT
1837 || hh
->eh
.root
.type
!= bfd_link_hash_undefweak
))
1840 loc
= htab
->srelgot
->contents
;
1841 /* FIXME (CAO): Should this be reloc_count++ ? */
1842 loc
+= htab
->srelgot
->reloc_count
* sizeof (Elf32_External_Rela
);
1845 if (tls_type
& GOT_TLS_GD
)
1849 outrel
.r_offset
= (cur_off
1850 + htab
->sgot
->output_section
->vma
1851 + htab
->sgot
->output_offset
);
1852 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_DTPMOD
);
1853 outrel
.r_addend
= 0;
1854 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ cur_off
);
1856 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1857 htab
->srelgot
->reloc_count
++;
1858 loc
+= sizeof (Elf32_External_Rela
);
1861 bfd_put_32 (output_bfd
, 0,
1862 htab
->sgot
->contents
+ cur_off
+ 4);
1865 bfd_put_32 (output_bfd
, 0,
1866 htab
->sgot
->contents
+ cur_off
+ 4);
1867 outrel
.r_info
= ELF32_R_INFO (indx
,
1868 R_METAG_TLS_DTPOFF
);
1869 outrel
.r_offset
+= 4;
1870 bfd_elf32_swap_reloca_out (output_bfd
,
1872 htab
->srelgot
->reloc_count
++;
1873 loc
+= sizeof (Elf32_External_Rela
);
1878 /* We don't support changing the TLS model. */
1885 if (tls_type
& GOT_TLS_IE
)
1889 outrel
.r_offset
= (cur_off
1890 + htab
->sgot
->output_section
->vma
1891 + htab
->sgot
->output_offset
);
1892 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_TPOFF
);
1895 outrel
.r_addend
= relocation
- dtpoff_base (info
);
1897 outrel
.r_addend
= 0;
1899 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1900 htab
->srelgot
->reloc_count
++;
1901 loc
+= sizeof (Elf32_External_Rela
);
1904 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
1905 htab
->sgot
->contents
+ cur_off
);
1911 hh
->eh
.got
.offset
|= 1;
1913 local_got_offsets
[r_symndx
] |= 1;
1916 /* Add the base of the GOT to the relocation value. */
1917 relocation
= off
- GOT_REG_OFFSET
;
1922 case R_METAG_TLS_IENONPIC_HI16
:
1923 case R_METAG_TLS_IENONPIC_LO16
:
1924 case R_METAG_TLS_LE_HI16
:
1925 case R_METAG_TLS_LE_LO16
:
1928 (*_bfd_error_handler
)
1929 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1930 input_bfd
, input_section
,
1931 (long) rel
->r_offset
, howto
->name
);
1935 relocation
= tpoff (info
, relocation
);
1937 case R_METAG_TLS_LDO_HI16
:
1938 case R_METAG_TLS_LDO_LO16
:
1940 relocation
= tpoff (info
, relocation
);
1942 relocation
-= dtpoff_base (info
);
1944 case R_METAG_TLS_LDM
:
1948 if (htab
->sgot
== NULL
)
1950 off
= htab
->tls_ldm_got
.offset
;
1955 Elf_Internal_Rela outrel
;
1958 outrel
.r_offset
= (off
1959 + htab
->sgot
->output_section
->vma
1960 + htab
->sgot
->output_offset
);
1962 outrel
.r_addend
= 0;
1963 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_TLS_DTPMOD
);
1964 loc
= htab
->srelgot
->contents
;
1965 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1966 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1967 htab
->tls_ldm_got
.offset
|= 1;
1970 relocation
= off
- GOT_REG_OFFSET
;
1977 r
= metag_final_link_relocate (howto
, input_bfd
, input_section
,
1978 contents
, rel
, relocation
, hh
, htab
,
1981 if (r
!= bfd_reloc_ok
)
1983 const char * msg
= (const char *) NULL
;
1987 case bfd_reloc_overflow
:
1988 r
= info
->callbacks
->reloc_overflow
1989 (info
, (hh
? &hh
->eh
.root
: NULL
), name
, howto
->name
,
1990 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1993 case bfd_reloc_undefined
:
1994 r
= info
->callbacks
->undefined_symbol
1995 (info
, name
, input_bfd
, input_section
, rel
->r_offset
,
1999 case bfd_reloc_outofrange
:
2000 msg
= _("internal error: out of range error");
2003 case bfd_reloc_notsupported
:
2004 msg
= _("internal error: unsupported relocation error");
2007 case bfd_reloc_dangerous
:
2008 msg
= _("internal error: dangerous relocation");
2012 msg
= _("internal error: unknown error");
2017 r
= info
->callbacks
->warning
2018 (info
, msg
, name
, input_bfd
, input_section
, rel
->r_offset
);
2028 /* Create the .plt and .got sections, and set up our hash table
2029 short-cuts to various dynamic sections. */
2032 elf_metag_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
2034 struct elf_metag_link_hash_table
*htab
;
2035 struct elf_link_hash_entry
*eh
;
2036 struct bfd_link_hash_entry
*bh
;
2037 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2039 /* Don't try to create the .plt and .got twice. */
2040 htab
= metag_link_hash_table (info
);
2041 if (htab
->splt
!= NULL
)
2044 /* Call the generic code to do most of the work. */
2045 if (! _bfd_elf_create_dynamic_sections (abfd
, info
))
2048 htab
->sgot
= bfd_get_linker_section (abfd
, ".got");
2052 htab
->sgotplt
= bfd_make_section_with_flags (abfd
, ".got.plt",
2053 (SEC_ALLOC
| SEC_LOAD
|
2056 SEC_LINKER_CREATED
));
2057 if (htab
->sgotplt
== NULL
2058 || !bfd_set_section_alignment (abfd
, htab
->sgotplt
, 2))
2061 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2062 section. We don't do this in the linker script because we don't want
2063 to define the symbol if we are not creating a global offset table. */
2065 if (!(_bfd_generic_link_add_one_symbol
2066 (info
, abfd
, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL
, htab
->sgot
,
2067 (bfd_vma
) 0, NULL
, FALSE
, bed
->collect
, &bh
)))
2069 eh
= (struct elf_link_hash_entry
*) bh
;
2070 eh
->def_regular
= 1;
2071 eh
->type
= STT_OBJECT
;
2072 eh
->other
= STV_HIDDEN
;
2074 if (! info
->executable
2075 && ! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2078 elf_hash_table (info
)->hgot
= eh
;
2080 htab
->splt
= bfd_get_linker_section (abfd
, ".plt");
2081 htab
->srelplt
= bfd_get_linker_section (abfd
, ".rela.plt");
2083 htab
->srelgot
= bfd_get_linker_section (abfd
, ".rela.got");
2085 htab
->sdynbss
= bfd_get_linker_section (abfd
, ".dynbss");
2086 htab
->srelbss
= bfd_get_linker_section (abfd
, ".rela.bss");
2091 /* Look through the relocs for a section during the first phase, and
2092 calculate needed space in the global offset table, procedure linkage
2093 table, and dynamic reloc sections. At this point we haven't
2094 necessarily read all the input files. */
2097 elf_metag_check_relocs (bfd
*abfd
,
2098 struct bfd_link_info
*info
,
2100 const Elf_Internal_Rela
*relocs
)
2102 Elf_Internal_Shdr
*symtab_hdr
;
2103 struct elf_link_hash_entry
**eh_syms
;
2104 const Elf_Internal_Rela
*rel
;
2105 const Elf_Internal_Rela
*rel_end
;
2106 struct elf_metag_link_hash_table
*htab
;
2109 int tls_type
= GOT_UNKNOWN
, old_tls_type
= GOT_UNKNOWN
;
2111 if (info
->relocatable
)
2114 htab
= metag_link_hash_table (info
);
2115 dynobj
= htab
->etab
.dynobj
;
2116 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2117 eh_syms
= elf_sym_hashes (abfd
);
2123 rel_end
= relocs
+ sec
->reloc_count
;
2124 for (rel
= relocs
; rel
< rel_end
; rel
++)
2127 struct elf_metag_link_hash_entry
*hh
;
2128 Elf_Internal_Sym
*isym
;
2129 unsigned long r_symndx
;
2131 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2132 r_type
= ELF32_R_TYPE (rel
->r_info
);
2133 if (r_symndx
< symtab_hdr
->sh_info
)
2135 /* A local symbol. */
2136 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2147 hh
= (struct elf_metag_link_hash_entry
*)
2148 eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
2149 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
2150 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
2151 hh
= (struct elf_metag_link_hash_entry
*) hh
->eh
.root
.u
.i
.link
;
2153 /* PR15323, ref flags aren't set for references in the same
2155 hh
->eh
.root
.non_ir_ref
= 1;
2158 /* Some relocs require a global offset table. */
2159 if (htab
->sgot
== NULL
)
2163 case R_METAG_TLS_GD
:
2164 case R_METAG_TLS_LDM
:
2165 case R_METAG_TLS_IE
:
2167 info
->flags
|= DF_STATIC_TLS
;
2170 case R_METAG_HI16_GOTOFF
:
2171 case R_METAG_LO16_GOTOFF
:
2172 case R_METAG_GETSET_GOTOFF
:
2173 case R_METAG_GETSET_GOT
:
2174 case R_METAG_HI16_GOTPC
:
2175 case R_METAG_LO16_GOTPC
:
2177 htab
->etab
.dynobj
= dynobj
= abfd
;
2178 if (!elf_metag_create_dynamic_sections (dynobj
, info
))
2189 case R_METAG_TLS_IE
:
2190 case R_METAG_TLS_GD
:
2191 case R_METAG_GETSET_GOT
:
2195 tls_type
= GOT_NORMAL
;
2197 case R_METAG_TLS_IE
:
2198 tls_type
= GOT_TLS_IE
;
2200 case R_METAG_TLS_GD
:
2201 tls_type
= GOT_TLS_GD
;
2207 hh
->eh
.got
.refcount
+= 1;
2208 old_tls_type
= hh
->tls_type
;
2212 bfd_signed_vma
*local_got_refcounts
;
2214 /* This is a global offset table entry for a local
2216 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2217 if (local_got_refcounts
== NULL
)
2221 size
= symtab_hdr
->sh_info
;
2222 size
*= sizeof (bfd_signed_vma
);
2223 /* Add in space to store the local GOT TLS types. */
2224 size
+= symtab_hdr
->sh_info
;
2225 local_got_refcounts
= ((bfd_signed_vma
*)
2226 bfd_zalloc (abfd
, size
));
2227 if (local_got_refcounts
== NULL
)
2229 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2230 memset (metag_elf_local_got_tls_type (abfd
),
2231 GOT_UNKNOWN
, symtab_hdr
->sh_info
);
2233 local_got_refcounts
[r_symndx
] += 1;
2234 old_tls_type
= metag_elf_local_got_tls_type (abfd
) [r_symndx
];
2237 if (old_tls_type
!= tls_type
)
2241 hh
->tls_type
= tls_type
;
2245 metag_elf_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2251 case R_METAG_TLS_LDM
:
2252 metag_link_hash_table (info
)->tls_ldm_got
.refcount
+= 1;
2255 case R_METAG_RELBRANCH_PLT
:
2256 /* This symbol requires a procedure linkage table entry. We
2257 actually build the entry in adjust_dynamic_symbol,
2258 because this might be a case of linking PIC code without
2259 linking in any dynamic objects, in which case we don't
2260 need to generate a procedure linkage table after all. */
2262 /* If this is a local symbol, we resolve it directly without
2263 creating a procedure linkage table entry. */
2267 if (hh
->eh
.forced_local
)
2270 hh
->eh
.needs_plt
= 1;
2271 hh
->eh
.plt
.refcount
+= 1;
2274 case R_METAG_HIADDR16
:
2275 case R_METAG_LOADDR16
:
2276 /* Let's help debug shared library creation. These relocs
2277 cannot be used in shared libs. Don't error out for
2278 sections we don't care about, such as debug sections or
2279 non-constant sections. */
2281 && (sec
->flags
& SEC_ALLOC
) != 0
2282 && (sec
->flags
& SEC_READONLY
) != 0)
2287 name
= hh
->eh
.root
.root
.string
;
2289 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
2290 (*_bfd_error_handler
)
2291 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2292 abfd
, elf_metag_howto_table
[r_type
].name
, name
);
2293 bfd_set_error (bfd_error_bad_value
);
2298 case R_METAG_ADDR32
:
2299 case R_METAG_RELBRANCH
:
2300 case R_METAG_GETSETOFF
:
2301 if (hh
!= NULL
&& !info
->shared
)
2303 hh
->eh
.non_got_ref
= 1;
2304 hh
->eh
.plt
.refcount
+= 1;
2307 /* If we are creating a shared library, and this is a reloc
2308 against a global symbol, or a non PC relative reloc
2309 against a local symbol, then we need to copy the reloc
2310 into the shared library. However, if we are linking with
2311 -Bsymbolic, we do not need to copy a reloc against a
2312 global symbol which is defined in an object we are
2313 including in the link (i.e., DEF_REGULAR is set). At
2314 this point we have not seen all the input files, so it is
2315 possible that DEF_REGULAR is not set now but will be set
2316 later (it is never cleared). We account for that
2317 possibility below by storing information in the
2318 dyn_relocs field of the hash table entry. A similar
2319 situation occurs when creating shared libraries and symbol
2320 visibility changes render the symbol local.
2322 If on the other hand, we are creating an executable, we
2323 may need to keep relocations for symbols satisfied by a
2324 dynamic library if we manage to avoid copy relocs for the
2327 && (sec
->flags
& SEC_ALLOC
) != 0
2328 && (r_type
!= R_METAG_RELBRANCH
2330 && (! info
->symbolic
2331 || hh
->eh
.root
.type
== bfd_link_hash_defweak
2332 || !hh
->eh
.def_regular
))))
2334 && (sec
->flags
& SEC_ALLOC
) != 0
2336 && (hh
->eh
.root
.type
== bfd_link_hash_defweak
2337 || !hh
->eh
.def_regular
)))
2339 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2340 struct elf_metag_dyn_reloc_entry
**hdh_head
;
2343 htab
->etab
.dynobj
= dynobj
= abfd
;
2345 /* When creating a shared object, we must copy these
2346 relocs into the output file. We create a reloc
2347 section in dynobj and make room for the reloc. */
2350 sreloc
= _bfd_elf_make_dynamic_reloc_section
2351 (sec
, htab
->etab
.dynobj
, 2, abfd
, /*rela?*/ TRUE
);
2355 bfd_set_error (bfd_error_bad_value
);
2359 elf_section_data (sec
)->sreloc
= sreloc
;
2362 /* If this is a global symbol, we count the number of
2363 relocations we need for this symbol. */
2365 hdh_head
= &((struct elf_metag_link_hash_entry
*) hh
)->dyn_relocs
;
2368 /* Track dynamic relocs needed for local syms too. */
2372 sr
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2376 vpp
= &elf_section_data (sr
)->local_dynrel
;
2377 hdh_head
= (struct elf_metag_dyn_reloc_entry
**) vpp
;
2381 if (hdh_p
== NULL
|| hdh_p
->sec
!= sec
)
2383 hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2384 bfd_alloc (dynobj
, sizeof *hdh_p
));
2387 hdh_p
->hdh_next
= *hdh_head
;
2391 hdh_p
->relative_count
= 0;
2395 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
2396 hdh_p
->relative_count
+= 1;
2400 /* This relocation describes the C++ object vtable hierarchy.
2401 Reconstruct it for later use during GC. */
2402 case R_METAG_GNU_VTINHERIT
:
2403 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, &hh
->eh
,
2408 /* This relocation describes which C++ vtable entries are actually
2409 used. Record for later use during GC. */
2410 case R_METAG_GNU_VTENTRY
:
2411 BFD_ASSERT (hh
!= NULL
);
2413 && !bfd_elf_gc_record_vtentry (abfd
, sec
, &hh
->eh
, rel
->r_addend
))
2422 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2425 elf_metag_copy_indirect_symbol (struct bfd_link_info
*info
,
2426 struct elf_link_hash_entry
*eh_dir
,
2427 struct elf_link_hash_entry
*eh_ind
)
2429 struct elf_metag_link_hash_entry
*hh_dir
, *hh_ind
;
2431 hh_dir
= metag_elf_hash_entry (eh_dir
);
2432 hh_ind
= metag_elf_hash_entry (eh_ind
);
2434 if (hh_ind
->dyn_relocs
!= NULL
)
2436 if (hh_dir
->dyn_relocs
!= NULL
)
2438 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2439 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2441 if (eh_ind
->root
.type
== bfd_link_hash_indirect
)
2444 /* Add reloc counts against the weak sym to the strong sym
2445 list. Merge any entries against the same section. */
2446 for (hdh_pp
= &hh_ind
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2448 struct elf_metag_dyn_reloc_entry
*hdh_q
;
2450 for (hdh_q
= hh_dir
->dyn_relocs
; hdh_q
!= NULL
;
2451 hdh_q
= hdh_q
->hdh_next
)
2452 if (hdh_q
->sec
== hdh_p
->sec
)
2454 hdh_q
->relative_count
+= hdh_p
->relative_count
;
2455 hdh_q
->count
+= hdh_p
->count
;
2456 *hdh_pp
= hdh_p
->hdh_next
;
2460 hdh_pp
= &hdh_p
->hdh_next
;
2462 *hdh_pp
= hh_dir
->dyn_relocs
;
2465 hh_dir
->dyn_relocs
= hh_ind
->dyn_relocs
;
2466 hh_ind
->dyn_relocs
= NULL
;
2469 if (eh_ind
->root
.type
== bfd_link_hash_indirect
2470 && eh_dir
->got
.refcount
<= 0)
2472 hh_dir
->tls_type
= hh_ind
->tls_type
;
2473 hh_ind
->tls_type
= GOT_UNKNOWN
;
2476 _bfd_elf_link_hash_copy_indirect (info
, eh_dir
, eh_ind
);
2479 /* Adjust a symbol defined by a dynamic object and referenced by a
2480 regular object. The current definition is in some section of the
2481 dynamic object, but we're not including those sections. We have to
2482 change the definition to something the rest of the link can
2486 elf_metag_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2487 struct elf_link_hash_entry
*eh
)
2489 struct elf_metag_link_hash_table
*htab
;
2490 struct elf_metag_link_hash_entry
*hh
;
2491 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2494 /* If this is a function, put it in the procedure linkage table. We
2495 will fill in the contents of the procedure linkage table later,
2496 when we know the address of the .got section. */
2497 if (eh
->type
== STT_FUNC
2500 if (eh
->plt
.refcount
<= 0
2501 || SYMBOL_CALLS_LOCAL (info
, eh
)
2502 || (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
2503 && eh
->root
.type
== bfd_link_hash_undefweak
))
2505 /* This case can occur if we saw a PLT reloc in an input
2506 file, but the symbol was never referred to by a dynamic
2507 object. In such a case, we don't actually need to build
2508 a procedure linkage table, and we can just do a PCREL
2510 eh
->plt
.offset
= (bfd_vma
) -1;
2517 eh
->plt
.offset
= (bfd_vma
) -1;
2519 /* If this is a weak symbol, and there is a real definition, the
2520 processor independent code will have arranged for us to see the
2521 real definition first, and we can just use the same value. */
2522 if (eh
->u
.weakdef
!= NULL
)
2524 if (eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defined
2525 && eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defweak
)
2527 eh
->root
.u
.def
.section
= eh
->u
.weakdef
->root
.u
.def
.section
;
2528 eh
->root
.u
.def
.value
= eh
->u
.weakdef
->root
.u
.def
.value
;
2529 eh
->non_got_ref
= eh
->u
.weakdef
->non_got_ref
;
2533 /* This is a reference to a symbol defined by a dynamic object which
2534 is not a function. */
2536 /* If we are creating a shared library, we must presume that the
2537 only references to the symbol are via the global offset table.
2538 For such cases we need not do anything here; the relocations will
2539 be handled correctly by relocate_section. */
2543 /* If there are no references to this symbol that do not use the
2544 GOT, we don't need to generate a copy reloc. */
2545 if (!eh
->non_got_ref
)
2548 /* If -z nocopyreloc was given, we won't generate them either. */
2549 if (info
->nocopyreloc
)
2551 eh
->non_got_ref
= 0;
2555 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2556 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2558 s
= hdh_p
->sec
->output_section
;
2559 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2563 /* If we didn't find any dynamic relocs in read-only sections, then
2564 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2567 eh
->non_got_ref
= 0;
2571 /* We must allocate the symbol in our .dynbss section, which will
2572 become part of the .bss section of the executable. There will be
2573 an entry for this symbol in the .dynsym section. The dynamic
2574 object will contain position independent code, so all references
2575 from the dynamic object to this symbol will go through the global
2576 offset table. The dynamic linker will use the .dynsym entry to
2577 determine the address it must put in the global offset table, so
2578 both the dynamic object and the regular object will refer to the
2579 same memory location for the variable. */
2581 htab
= metag_link_hash_table (info
);
2583 /* We must generate a COPY reloc to tell the dynamic linker to
2584 copy the initial value out of the dynamic object and into the
2585 runtime process image. */
2586 if ((eh
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && eh
->size
!= 0)
2588 htab
->srelbss
->size
+= sizeof (Elf32_External_Rela
);
2594 return _bfd_elf_adjust_dynamic_copy (info
, eh
, s
);
2597 /* Allocate space in .plt, .got and associated reloc sections for
2601 allocate_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2603 struct bfd_link_info
*info
;
2604 struct elf_metag_link_hash_table
*htab
;
2605 struct elf_metag_link_hash_entry
*hh
;
2606 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2608 if (eh
->root
.type
== bfd_link_hash_indirect
)
2611 if (eh
->root
.type
== bfd_link_hash_warning
)
2612 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2615 htab
= metag_link_hash_table (info
);
2617 if (htab
->etab
.dynamic_sections_created
2618 && eh
->plt
.refcount
> 0)
2620 /* Make sure this symbol is output as a dynamic symbol.
2621 Undefined weak syms won't yet be marked as dynamic. */
2622 if (eh
->dynindx
== -1
2623 && !eh
->forced_local
)
2625 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2629 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
->shared
, eh
))
2631 asection
*s
= htab
->splt
;
2633 /* If this is the first .plt entry, make room for the special
2636 s
->size
+= PLT_ENTRY_SIZE
;
2638 eh
->plt
.offset
= s
->size
;
2640 /* If this symbol is not defined in a regular file, and we are
2641 not generating a shared library, then set the symbol to this
2642 location in the .plt. This is required to make function
2643 pointers compare as equal between the normal executable and
2644 the shared library. */
2646 && !eh
->def_regular
)
2648 eh
->root
.u
.def
.section
= s
;
2649 eh
->root
.u
.def
.value
= eh
->plt
.offset
;
2652 /* Make room for this entry. */
2653 s
->size
+= PLT_ENTRY_SIZE
;
2655 /* We also need to make an entry in the .got.plt section, which
2656 will be placed in the .got section by the linker script. */
2657 htab
->sgotplt
->size
+= 4;
2659 /* We also need to make an entry in the .rel.plt section. */
2660 htab
->srelplt
->size
+= sizeof (Elf32_External_Rela
);
2664 eh
->plt
.offset
= (bfd_vma
) -1;
2670 eh
->plt
.offset
= (bfd_vma
) -1;
2674 if (eh
->got
.refcount
> 0)
2678 int tls_type
= metag_elf_hash_entry (eh
)->tls_type
;
2680 /* Make sure this symbol is output as a dynamic symbol.
2681 Undefined weak syms won't yet be marked as dynamic. */
2682 if (eh
->dynindx
== -1
2683 && !eh
->forced_local
)
2685 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2691 eh
->got
.offset
= s
->size
;
2693 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2694 if (tls_type
== GOT_TLS_GD
)
2696 dyn
= htab
->etab
.dynamic_sections_created
;
2697 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2698 R_METAG_TLS_GD needs one if local symbol and two if global. */
2699 if ((tls_type
== GOT_TLS_GD
&& eh
->dynindx
== -1)
2700 || (tls_type
== GOT_TLS_IE
&& dyn
))
2701 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2702 else if (tls_type
== GOT_TLS_GD
)
2703 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rela
);
2704 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, eh
))
2705 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2708 eh
->got
.offset
= (bfd_vma
) -1;
2710 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2711 if (hh
->dyn_relocs
== NULL
)
2714 /* If this is a -Bsymbolic shared link, then we need to discard all
2715 space allocated for dynamic pc-relative relocs against symbols
2716 defined in a regular object. For the normal shared case, discard
2717 space for relocs that have become local due to symbol visibility
2721 if (SYMBOL_CALLS_LOCAL (info
, eh
))
2723 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2725 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2727 hdh_p
->count
-= hdh_p
->relative_count
;
2728 hdh_p
->relative_count
= 0;
2729 if (hdh_p
->count
== 0)
2730 *hdh_pp
= hdh_p
->hdh_next
;
2732 hdh_pp
= &hdh_p
->hdh_next
;
2736 /* Also discard relocs on undefined weak syms with non-default
2738 if (hh
->dyn_relocs
!= NULL
2739 && eh
->root
.type
== bfd_link_hash_undefweak
)
2741 if (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
)
2742 hh
->dyn_relocs
= NULL
;
2744 /* Make sure undefined weak symbols are output as a dynamic
2746 else if (eh
->dynindx
== -1
2747 && !eh
->forced_local
)
2749 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2756 /* For the non-shared case, discard space for relocs against
2757 symbols which turn out to need copy relocs or are not
2759 if (!eh
->non_got_ref
2760 && ((eh
->def_dynamic
2761 && !eh
->def_regular
)
2762 || (htab
->etab
.dynamic_sections_created
2763 && (eh
->root
.type
== bfd_link_hash_undefweak
2764 || eh
->root
.type
== bfd_link_hash_undefined
))))
2766 /* Make sure this symbol is output as a dynamic symbol.
2767 Undefined weak syms won't yet be marked as dynamic. */
2768 if (eh
->dynindx
== -1
2769 && !eh
->forced_local
)
2771 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2775 /* If that succeeded, we know we'll be keeping all the
2777 if (eh
->dynindx
!= -1)
2781 hh
->dyn_relocs
= NULL
;
2787 /* Finally, allocate space. */
2788 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2790 asection
*sreloc
= elf_section_data (hdh_p
->sec
)->sreloc
;
2791 sreloc
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2797 /* Find any dynamic relocs that apply to read-only sections. */
2800 readonly_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2802 struct elf_metag_link_hash_entry
*hh
;
2803 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2805 if (eh
->root
.type
== bfd_link_hash_warning
)
2806 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2808 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2809 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2811 asection
*s
= hdh_p
->sec
->output_section
;
2813 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2815 struct bfd_link_info
*info
= inf
;
2817 info
->flags
|= DF_TEXTREL
;
2819 /* Not an error, just cut short the traversal. */
2826 /* Set the sizes of the dynamic sections. */
2829 elf_metag_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2830 struct bfd_link_info
*info
)
2832 struct elf_metag_link_hash_table
*htab
;
2838 htab
= metag_link_hash_table (info
);
2839 dynobj
= htab
->etab
.dynobj
;
2843 if (htab
->etab
.dynamic_sections_created
)
2845 /* Set the contents of the .interp section to the interpreter. */
2846 if (info
->executable
)
2848 s
= bfd_get_linker_section (dynobj
, ".interp");
2851 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2852 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2856 /* Set up .got offsets for local syms, and space for local dynamic
2858 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2860 bfd_signed_vma
*local_got
;
2861 bfd_signed_vma
*end_local_got
;
2862 bfd_size_type locsymcount
;
2863 Elf_Internal_Shdr
*symtab_hdr
;
2865 char *local_tls_type
;
2867 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2870 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2872 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2874 for (hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2875 elf_section_data (s
)->local_dynrel
);
2877 hdh_p
= hdh_p
->hdh_next
)
2879 if (!bfd_is_abs_section (hdh_p
->sec
)
2880 && bfd_is_abs_section (hdh_p
->sec
->output_section
))
2882 /* Input section has been discarded, either because
2883 it is a copy of a linkonce section or due to
2884 linker script /DISCARD/, so we'll be discarding
2887 else if (hdh_p
->count
!= 0)
2889 srel
= elf_section_data (hdh_p
->sec
)->sreloc
;
2890 srel
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2891 if ((hdh_p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2892 info
->flags
|= DF_TEXTREL
;
2897 local_got
= elf_local_got_refcounts (ibfd
);
2901 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2902 locsymcount
= symtab_hdr
->sh_info
;
2903 end_local_got
= local_got
+ locsymcount
;
2904 local_tls_type
= metag_elf_local_got_tls_type (ibfd
);
2906 srel
= htab
->srelgot
;
2907 for (; local_got
< end_local_got
; ++local_got
)
2911 *local_got
= s
->size
;
2912 s
->size
+= GOT_ENTRY_SIZE
;
2913 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2914 if (*local_tls_type
== GOT_TLS_GD
)
2917 srel
->size
+= sizeof (Elf32_External_Rela
);
2920 *local_got
= (bfd_vma
) -1;
2925 if (htab
->tls_ldm_got
.refcount
> 0)
2927 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2929 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2930 htab
->sgot
->size
+= 8;
2931 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2934 htab
->tls_ldm_got
.offset
= -1;
2936 /* Allocate global sym .plt and .got entries, and space for global
2937 sym dynamic relocs. */
2938 elf_link_hash_traverse (&htab
->etab
, allocate_dynrelocs
, info
);
2940 /* We now have determined the sizes of the various dynamic sections.
2941 Allocate memory for them. */
2943 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2945 bfd_boolean reloc_section
= FALSE
;
2947 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2952 || s
== htab
->sgotplt
2953 || s
== htab
->sdynbss
)
2955 /* Strip this section if we don't need it; see the
2958 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2960 if (s
->size
!= 0 && s
!= htab
->srelplt
)
2963 /* We use the reloc_count field as a counter if we need
2964 to copy relocs into the output file. */
2966 reloc_section
= TRUE
;
2970 /* It's not one of our sections, so don't allocate space. */
2976 /* If we don't need this section, strip it from the
2977 output file. This is mostly to handle .rela.bss and
2978 .rela.plt. We must create both sections in
2979 create_dynamic_sections, because they must be created
2980 before the linker maps input sections to output
2981 sections. The linker does that before
2982 adjust_dynamic_symbol is called, and it is that
2983 function which decides whether anything needs to go
2984 into these sections. */
2985 s
->flags
|= SEC_EXCLUDE
;
2989 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2992 /* Allocate memory for the section contents. */
2993 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2994 if (s
->contents
== NULL
)
2996 else if (reloc_section
)
2998 unsigned char *contents
= s
->contents
;
2999 Elf32_External_Rela reloc
;
3001 /* Fill the reloc section with a R_METAG_NONE type reloc. */
3002 memset(&reloc
, 0, sizeof(Elf32_External_Rela
));
3003 reloc
.r_info
[0] = R_METAG_NONE
;
3004 for (; contents
< (s
->contents
+ s
->size
);
3005 contents
+= sizeof(Elf32_External_Rela
))
3007 memcpy(contents
, &reloc
, sizeof(Elf32_External_Rela
));
3012 if (htab
->etab
.dynamic_sections_created
)
3014 /* Add some entries to the .dynamic section. We fill in the
3015 values later, in elf_metag_finish_dynamic_sections, but we
3016 must add the entries now so that we get the correct size for
3017 the .dynamic section. The DT_DEBUG entry is filled in by the
3018 dynamic linker and used by the debugger. */
3019 #define add_dynamic_entry(TAG, VAL) \
3020 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3022 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3025 if (info
->executable
)
3027 if (!add_dynamic_entry (DT_DEBUG
, 0))
3031 if (htab
->srelplt
->size
!= 0)
3033 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3034 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3035 || !add_dynamic_entry (DT_JMPREL
, 0))
3041 if (!add_dynamic_entry (DT_RELA
, 0)
3042 || !add_dynamic_entry (DT_RELASZ
, 0)
3043 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3046 /* If any dynamic relocs apply to a read-only section,
3047 then we need a DT_TEXTREL entry. */
3048 if ((info
->flags
& DF_TEXTREL
) == 0)
3049 elf_link_hash_traverse (&htab
->etab
, readonly_dynrelocs
, info
);
3051 if ((info
->flags
& DF_TEXTREL
) != 0)
3053 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3058 #undef add_dynamic_entry
3063 /* Finish up dynamic symbol handling. We set the contents of various
3064 dynamic sections here. */
3067 elf_metag_finish_dynamic_symbol (bfd
*output_bfd
,
3068 struct bfd_link_info
*info
,
3069 struct elf_link_hash_entry
*eh
,
3070 Elf_Internal_Sym
*sym
)
3072 struct elf_metag_link_hash_table
*htab
;
3073 Elf_Internal_Rela rel
;
3076 htab
= metag_link_hash_table (info
);
3078 if (eh
->plt
.offset
!= (bfd_vma
) -1)
3088 if (eh
->plt
.offset
& 1)
3091 BFD_ASSERT (eh
->dynindx
!= -1);
3094 sgot
= htab
->sgotplt
;
3095 srela
= htab
->srelplt
;
3096 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
3098 /* Get the index in the procedure linkage table which
3099 corresponds to this symbol. This is the index of this symbol
3100 in all the symbols for which we are making plt entries. The
3101 first entry in the procedure linkage table is reserved. */
3102 plt_index
= eh
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3104 /* Get the offset into the .got.plt table of the entry that
3105 corresponds to this function. */
3106 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3108 BFD_ASSERT (got_offset
< (1 << 16));
3110 got_entry
= sgot
->output_section
->vma
3111 + sgot
->output_offset
3114 BFD_ASSERT (plt_index
< (1 << 16));
3116 /* Fill in the entry in the procedure linkage table. */
3119 bfd_put_32 (output_bfd
,
3121 | (((got_entry
>> 16) & 0xffff) << 3)),
3122 splt
->contents
+ eh
->plt
.offset
);
3123 bfd_put_32 (output_bfd
,
3125 | ((got_entry
& 0xffff) << 3)),
3126 splt
->contents
+ eh
->plt
.offset
+ 4);
3127 bfd_put_32 (output_bfd
, plt_entry
[2],
3128 splt
->contents
+ eh
->plt
.offset
+ 8);
3129 bfd_put_32 (output_bfd
,
3130 (plt_entry
[3] | (plt_index
<< 3)),
3131 splt
->contents
+ eh
->plt
.offset
+ 12);
3132 bfd_put_32 (output_bfd
,
3134 | ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3135 splt
->contents
+ eh
->plt
.offset
+ 16);
3139 bfd_vma addr
= got_entry
- (splt
->output_section
->vma
+
3140 splt
->output_offset
+ eh
->plt
.offset
);
3142 bfd_put_32 (output_bfd
,
3143 plt_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3144 splt
->contents
+ eh
->plt
.offset
);
3145 bfd_put_32 (output_bfd
,
3146 plt_pic_entry
[1] | ((addr
& 0xffff) << 3),
3147 splt
->contents
+ eh
->plt
.offset
+ 4);
3148 bfd_put_32 (output_bfd
, plt_pic_entry
[2],
3149 splt
->contents
+ eh
->plt
.offset
+ 8);
3150 bfd_put_32 (output_bfd
,
3151 (plt_pic_entry
[3] | (plt_index
<< 3)),
3152 splt
->contents
+ eh
->plt
.offset
+ 12);
3153 bfd_put_32 (output_bfd
,
3155 + ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3156 splt
->contents
+ eh
->plt
.offset
+ 16);
3159 /* Fill in the entry in the global offset table. */
3160 bfd_put_32 (output_bfd
,
3161 (splt
->output_section
->vma
3162 + splt
->output_offset
3164 + 12), /* offset within PLT entry */
3165 sgot
->contents
+ got_offset
);
3167 /* Fill in the entry in the .rela.plt section. */
3168 rel
.r_offset
= (sgot
->output_section
->vma
3169 + sgot
->output_offset
3171 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_JMP_SLOT
);
3173 loc
= htab
->srelplt
->contents
;
3174 loc
+= plt_index
* sizeof(Elf32_External_Rela
);
3175 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3177 if (!eh
->def_regular
)
3179 /* Mark the symbol as undefined, rather than as defined in
3180 the .plt section. Leave the value alone. */
3181 sym
->st_shndx
= SHN_UNDEF
;
3185 if (eh
->got
.offset
!= (bfd_vma
) -1
3186 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_GD
) == 0
3187 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_IE
) == 0)
3189 /* This symbol has an entry in the global offset table. Set it
3192 rel
.r_offset
= ((eh
->got
.offset
&~ (bfd_vma
) 1)
3193 + htab
->sgot
->output_offset
3194 + htab
->sgot
->output_section
->vma
);
3196 /* If this is a -Bsymbolic link and the symbol is defined
3197 locally or was forced to be local because of a version file,
3198 we just want to emit a RELATIVE reloc. The entry in the
3199 global offset table will already have been initialized in the
3200 relocate_section function. */
3202 && (info
->symbolic
|| eh
->dynindx
== -1)
3205 rel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
3206 rel
.r_addend
= (eh
->root
.u
.def
.value
3207 + eh
->root
.u
.def
.section
->output_offset
3208 + eh
->root
.u
.def
.section
->output_section
->vma
);
3212 if ((eh
->got
.offset
& 1) != 0)
3214 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ eh
->got
.offset
);
3215 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_GLOB_DAT
);
3219 loc
= htab
->srelgot
->contents
;
3220 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3221 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3228 /* This symbol needs a copy reloc. Set it up. */
3230 if (! (eh
->dynindx
!= -1
3231 && (eh
->root
.type
== bfd_link_hash_defined
3232 || eh
->root
.type
== bfd_link_hash_defweak
)))
3237 rel
.r_offset
= (eh
->root
.u
.def
.value
3238 + eh
->root
.u
.def
.section
->output_offset
3239 + eh
->root
.u
.def
.section
->output_section
->vma
);
3241 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_COPY
);
3242 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3243 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3246 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3247 if (eh
->root
.root
.string
[0] == '_'
3248 && (strcmp (eh
->root
.root
.string
, "_DYNAMIC") == 0
3249 || eh
== htab
->etab
.hgot
))
3251 sym
->st_shndx
= SHN_ABS
;
3257 /* Set the Meta ELF ABI version. */
3260 elf_metag_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info
)
3262 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
3264 _bfd_elf_post_process_headers (abfd
, link_info
);
3265 i_ehdrp
= elf_elfheader (abfd
);
3266 i_ehdrp
->e_ident
[EI_ABIVERSION
] = METAG_ELF_ABI_VERSION
;
3269 /* Used to decide how to sort relocs in an optimal manner for the
3270 dynamic linker, before writing them out. */
3272 static enum elf_reloc_type_class
3273 elf_metag_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3274 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3275 const Elf_Internal_Rela
*rela
)
3277 switch ((int) ELF32_R_TYPE (rela
->r_info
))
3279 case R_METAG_RELATIVE
:
3280 return reloc_class_relative
;
3281 case R_METAG_JMP_SLOT
:
3282 return reloc_class_plt
;
3284 return reloc_class_copy
;
3286 return reloc_class_normal
;
3290 /* Finish up the dynamic sections. */
3293 elf_metag_finish_dynamic_sections (bfd
*output_bfd
,
3294 struct bfd_link_info
*info
)
3297 struct elf_metag_link_hash_table
*htab
;
3300 htab
= metag_link_hash_table (info
);
3301 dynobj
= htab
->etab
.dynobj
;
3303 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3305 if (htab
->etab
.dynamic_sections_created
)
3308 Elf32_External_Dyn
*dyncon
, *dynconend
;
3313 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3314 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3315 for (; dyncon
< dynconend
; dyncon
++)
3317 Elf_Internal_Dyn dyn
;
3320 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3328 s
= htab
->sgot
->output_section
;
3329 BFD_ASSERT (s
!= NULL
);
3330 dyn
.d_un
.d_ptr
= s
->vma
+ htab
->sgot
->output_offset
;
3331 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3335 s
= htab
->srelplt
->output_section
;
3336 BFD_ASSERT (s
!= NULL
);
3337 dyn
.d_un
.d_ptr
= s
->vma
;
3338 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3343 dyn
.d_un
.d_val
= s
->size
;
3344 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3348 /* Don't count procedure linkage table relocs in the
3349 overall reloc count. */
3350 if (htab
->srelplt
) {
3352 dyn
.d_un
.d_val
-= s
->size
;
3354 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3358 /* We may not be using the standard ELF linker script.
3359 If .rela.plt is the first .rela section, we adjust
3360 DT_RELA to not include it. */
3361 if (htab
->srelplt
) {
3363 if (dyn
.d_un
.d_ptr
== s
->output_section
->vma
+ s
->output_offset
)
3364 dyn
.d_un
.d_ptr
+= s
->size
;
3366 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3372 /* Fill in the first entry in the procedure linkage table. */
3374 if (splt
&& splt
->size
> 0)
3377 /* addr = .got + 4 */
3378 addr
= htab
->sgot
->output_section
->vma
+
3379 htab
->sgot
->output_offset
+ 4;
3382 addr
-= splt
->output_section
->vma
+ splt
->output_offset
;
3383 bfd_put_32 (output_bfd
,
3384 plt0_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3386 bfd_put_32 (output_bfd
,
3387 plt0_pic_entry
[1] | ((addr
& 0xffff) << 3),
3388 splt
->contents
+ 4);
3389 bfd_put_32 (output_bfd
, plt0_pic_entry
[2], splt
->contents
+ 8);
3390 bfd_put_32 (output_bfd
, plt0_pic_entry
[3], splt
->contents
+ 12);
3391 bfd_put_32 (output_bfd
, plt0_pic_entry
[4], splt
->contents
+ 16);
3395 bfd_put_32 (output_bfd
,
3396 plt0_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3398 bfd_put_32 (output_bfd
,
3399 plt0_entry
[1] | ((addr
& 0xffff) << 3),
3400 splt
->contents
+ 4);
3401 bfd_put_32 (output_bfd
, plt0_entry
[2], splt
->contents
+ 8);
3402 bfd_put_32 (output_bfd
, plt0_entry
[3], splt
->contents
+ 12);
3403 bfd_put_32 (output_bfd
, plt0_entry
[4], splt
->contents
+ 16);
3406 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
=
3411 if (htab
->sgot
!= NULL
&& htab
->sgot
->size
!= 0)
3413 /* Fill in the first entry in the global offset table.
3414 We use it to point to our dynamic section, if we have one. */
3415 bfd_put_32 (output_bfd
,
3416 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0,
3417 htab
->sgot
->contents
);
3419 /* The second entry is reserved for use by the dynamic linker. */
3420 memset (htab
->sgot
->contents
+ GOT_ENTRY_SIZE
, 0, GOT_ENTRY_SIZE
);
3422 /* Set .got entry size. */
3423 elf_section_data (htab
->sgot
->output_section
)
3424 ->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3430 /* Return the section that should be marked against GC for a given
3434 elf_metag_gc_mark_hook (asection
*sec
,
3435 struct bfd_link_info
*info
,
3436 Elf_Internal_Rela
*rela
,
3437 struct elf_link_hash_entry
*hh
,
3438 Elf_Internal_Sym
*sym
)
3441 switch ((unsigned int) ELF32_R_TYPE (rela
->r_info
))
3443 case R_METAG_GNU_VTINHERIT
:
3444 case R_METAG_GNU_VTENTRY
:
3448 return _bfd_elf_gc_mark_hook (sec
, info
, rela
, hh
, sym
);
3451 /* Update the got and plt entry reference counts for the section being
3455 elf_metag_gc_sweep_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
3456 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3457 asection
*sec ATTRIBUTE_UNUSED
,
3458 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
3460 Elf_Internal_Shdr
*symtab_hdr
;
3461 struct elf_link_hash_entry
**eh_syms
;
3462 bfd_signed_vma
*local_got_refcounts
;
3463 bfd_signed_vma
*local_plt_refcounts
;
3464 const Elf_Internal_Rela
*rel
, *relend
;
3466 if (info
->relocatable
)
3469 elf_section_data (sec
)->local_dynrel
= NULL
;
3471 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3472 eh_syms
= elf_sym_hashes (abfd
);
3473 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3474 local_plt_refcounts
= local_got_refcounts
;
3475 if (local_plt_refcounts
!= NULL
)
3476 local_plt_refcounts
+= symtab_hdr
->sh_info
;
3478 relend
= relocs
+ sec
->reloc_count
;
3479 for (rel
= relocs
; rel
< relend
; rel
++)
3481 unsigned long r_symndx
;
3482 unsigned int r_type
;
3483 struct elf_link_hash_entry
*eh
= NULL
;
3485 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3486 if (r_symndx
>= symtab_hdr
->sh_info
)
3488 struct elf_metag_link_hash_entry
*hh
;
3489 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3490 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3492 eh
= eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
3493 while (eh
->root
.type
== bfd_link_hash_indirect
3494 || eh
->root
.type
== bfd_link_hash_warning
)
3495 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
3496 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3498 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3499 hdh_pp
= &hdh_p
->hdh_next
)
3500 if (hdh_p
->sec
== sec
)
3502 /* Everything must go for SEC. */
3503 *hdh_pp
= hdh_p
->hdh_next
;
3508 r_type
= ELF32_R_TYPE (rel
->r_info
);
3511 case R_METAG_TLS_LDM
:
3512 if (metag_link_hash_table (info
)->tls_ldm_got
.refcount
> 0)
3513 metag_link_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
3515 case R_METAG_TLS_IE
:
3516 case R_METAG_TLS_GD
:
3517 case R_METAG_GETSET_GOT
:
3520 if (eh
->got
.refcount
> 0)
3521 eh
->got
.refcount
-= 1;
3523 else if (local_got_refcounts
!= NULL
)
3525 if (local_got_refcounts
[r_symndx
] > 0)
3526 local_got_refcounts
[r_symndx
] -= 1;
3530 case R_METAG_RELBRANCH_PLT
:
3533 if (eh
->plt
.refcount
> 0)
3534 eh
->plt
.refcount
-= 1;
3538 case R_METAG_ADDR32
:
3539 case R_METAG_HIADDR16
:
3540 case R_METAG_LOADDR16
:
3541 case R_METAG_GETSETOFF
:
3542 case R_METAG_RELBRANCH
:
3545 struct elf_metag_link_hash_entry
*hh
;
3546 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3547 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3549 if (!info
->shared
&& eh
->plt
.refcount
> 0)
3550 eh
->plt
.refcount
-= 1;
3552 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3554 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3555 hdh_pp
= &hdh_p
->hdh_next
)
3556 if (hdh_p
->sec
== sec
)
3558 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
3559 hdh_p
->relative_count
-= 1;
3561 if (hdh_p
->count
== 0)
3562 *hdh_pp
= hdh_p
->hdh_next
;
3576 /* Determine the type of stub needed, if any, for a call. */
3578 static enum elf_metag_stub_type
3579 metag_type_of_stub (asection
*input_sec
,
3580 const Elf_Internal_Rela
*rel
,
3581 struct elf_metag_link_hash_entry
*hh
,
3582 bfd_vma destination
,
3583 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3586 bfd_vma branch_offset
;
3587 bfd_vma max_branch_offset
;
3590 !(hh
->eh
.root
.type
== bfd_link_hash_defined
3591 || hh
->eh
.root
.type
== bfd_link_hash_defweak
))
3592 return metag_stub_none
;
3594 /* Determine where the call point is. */
3595 location
= (input_sec
->output_offset
3596 + input_sec
->output_section
->vma
3599 branch_offset
= destination
- location
;
3601 /* Determine if a long branch stub is needed. Meta branch offsets
3602 are signed 19 bits 4 byte aligned. */
3603 max_branch_offset
= (1 << (BRANCH_BITS
-1)) << 2;
3605 if (branch_offset
+ max_branch_offset
>= 2*max_branch_offset
)
3608 return metag_stub_long_branch_shared
;
3610 return metag_stub_long_branch
;
3613 return metag_stub_none
;
3616 #define MOVT_A0_3 0x82180005
3617 #define JUMP_A0_3 0xac180003
3619 #define MOVT_A1LBP 0x83080005
3620 #define ADD_A1LBP 0x83080000
3622 #define ADDT_A0_3_CPC 0x82980001
3623 #define ADD_A0_3_A0_3 0x82180000
3624 #define MOV_PC_A0_3 0xa3180ca0
3627 metag_build_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3629 struct elf_metag_stub_hash_entry
*hsh
;
3636 /* Massage our args to the form they really have. */
3637 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3639 stub_sec
= hsh
->stub_sec
;
3641 /* Make a note of the offset within the stubs for this entry. */
3642 hsh
->stub_offset
= stub_sec
->size
;
3643 loc
= stub_sec
->contents
+ hsh
->stub_offset
;
3645 stub_bfd
= stub_sec
->owner
;
3647 switch (hsh
->stub_type
)
3649 case metag_stub_long_branch_shared
:
3650 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3651 calculate the jump target using A0.3 as a temporary. Then a MOV
3652 to PC carries out the jump. */
3653 sym_value
= (hsh
->target_value
3654 + hsh
->target_section
->output_offset
3655 + hsh
->target_section
->output_section
->vma
3658 sym_value
-= (hsh
->stub_offset
3659 + stub_sec
->output_offset
3660 + stub_sec
->output_section
->vma
);
3662 bfd_put_32 (stub_bfd
, ADDT_A0_3_CPC
| (((sym_value
>> 16) & 0xffff) << 3),
3665 bfd_put_32 (stub_bfd
, ADD_A0_3_A0_3
| ((sym_value
& 0xffff) << 3),
3668 bfd_put_32 (stub_bfd
, MOV_PC_A0_3
, loc
+ 8);
3672 case metag_stub_long_branch
:
3673 /* A standard long branch stub is a MOVT instruction followed by a
3674 JUMP instruction using the A0.3 register as a temporary. This is
3675 the same method used by the LDLK linker (patch.c). */
3676 sym_value
= (hsh
->target_value
3677 + hsh
->target_section
->output_offset
3678 + hsh
->target_section
->output_section
->vma
3681 bfd_put_32 (stub_bfd
, MOVT_A0_3
| (((sym_value
>> 16) & 0xffff) << 3),
3684 bfd_put_32 (stub_bfd
, JUMP_A0_3
| ((sym_value
& 0xffff) << 3), loc
+ 4);
3693 stub_sec
->size
+= size
;
3697 /* As above, but don't actually build the stub. Just bump offset so
3698 we know stub section sizes. */
3701 metag_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3703 struct elf_metag_stub_hash_entry
*hsh
;
3706 /* Massage our args to the form they really have. */
3707 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3709 if (hsh
->stub_type
== metag_stub_long_branch
)
3711 else if (hsh
->stub_type
== metag_stub_long_branch_shared
)
3714 hsh
->stub_sec
->size
+= size
;
3718 /* Set up various things so that we can make a list of input sections
3719 for each output section included in the link. Returns -1 on error,
3720 0 when no stubs will be needed, and 1 on success. */
3723 elf_metag_setup_section_lists (bfd
*output_bfd
, struct bfd_link_info
*info
)
3726 unsigned int bfd_count
;
3727 int top_id
, top_index
;
3729 asection
**input_list
, **list
;
3731 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3733 /* Count the number of input BFDs and find the top input section id. */
3734 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3736 input_bfd
= input_bfd
->link
.next
)
3739 for (section
= input_bfd
->sections
;
3741 section
= section
->next
)
3743 if (top_id
< section
->id
)
3744 top_id
= section
->id
;
3748 htab
->bfd_count
= bfd_count
;
3750 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3751 htab
->stub_group
= bfd_zmalloc (amt
);
3752 if (htab
->stub_group
== NULL
)
3755 /* We can't use output_bfd->section_count here to find the top output
3756 section index as some sections may have been removed, and
3757 strip_excluded_output_sections doesn't renumber the indices. */
3758 for (section
= output_bfd
->sections
, top_index
= 0;
3760 section
= section
->next
)
3762 if (top_index
< section
->index
)
3763 top_index
= section
->index
;
3766 htab
->top_index
= top_index
;
3767 amt
= sizeof (asection
*) * (top_index
+ 1);
3768 input_list
= bfd_malloc (amt
);
3769 htab
->input_list
= input_list
;
3770 if (input_list
== NULL
)
3773 /* For sections we aren't interested in, mark their entries with a
3774 value we can check later. */
3775 list
= input_list
+ top_index
;
3777 *list
= bfd_abs_section_ptr
;
3778 while (list
-- != input_list
);
3780 for (section
= output_bfd
->sections
;
3782 section
= section
->next
)
3784 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3785 * have PC relative relocs in them but no code flag set. */
3786 if (((section
->flags
& SEC_CODE
) != 0) ||
3787 strcmp(".ctors", section
->name
) ||
3788 strcmp(".dtors", section
->name
))
3789 input_list
[section
->index
] = NULL
;
3795 /* The linker repeatedly calls this function for each input section,
3796 in the order that input sections are linked into output sections.
3797 Build lists of input sections to determine groupings between which
3798 we may insert linker stubs. */
3801 elf_metag_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3803 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3805 if (isec
->output_section
->index
<= htab
->top_index
)
3807 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3808 if (*list
!= bfd_abs_section_ptr
)
3810 /* Steal the link_sec pointer for our list. */
3811 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3812 /* This happens to make the list in reverse order,
3813 which is what we want. */
3814 PREV_SEC (isec
) = *list
;
3820 /* See whether we can group stub sections together. Grouping stub
3821 sections may result in fewer stubs. More importantly, we need to
3822 put all .init* and .fini* stubs at the beginning of the .init or
3823 .fini output sections respectively, because glibc splits the
3824 _init and _fini functions into multiple parts. Putting a stub in
3825 the middle of a function is not a good idea. */
3828 group_sections (struct elf_metag_link_hash_table
*htab
,
3829 bfd_size_type stub_group_size
,
3830 bfd_boolean stubs_always_before_branch
)
3832 asection
**list
= htab
->input_list
+ htab
->top_index
;
3835 asection
*tail
= *list
;
3836 if (tail
== bfd_abs_section_ptr
)
3838 while (tail
!= NULL
)
3842 bfd_size_type total
;
3843 bfd_boolean big_sec
;
3847 big_sec
= total
>= stub_group_size
;
3849 while ((prev
= PREV_SEC (curr
)) != NULL
3850 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3854 /* OK, the size from the start of CURR to the end is less
3855 than stub_group_size bytes and thus can be handled by one stub
3856 section. (or the tail section is itself larger than
3857 stub_group_size bytes, in which case we may be toast.)
3858 We should really be keeping track of the total size of
3859 stubs added here, as stubs contribute to the final output
3863 prev
= PREV_SEC (tail
);
3864 /* Set up this stub group. */
3865 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3867 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3869 /* But wait, there's more! Input sections up to stub_group_size
3870 bytes before the stub section can be handled by it too.
3871 Don't do this if we have a really large section after the
3872 stubs, as adding more stubs increases the chance that
3873 branches may not reach into the stub section. */
3874 if (!stubs_always_before_branch
&& !big_sec
)
3878 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3882 prev
= PREV_SEC (tail
);
3883 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3889 while (list
-- != htab
->input_list
);
3890 free (htab
->input_list
);
3894 /* Read in all local syms for all input bfds.
3895 Returns -1 on error, 0 otherwise. */
3898 get_local_syms (bfd
*output_bfd ATTRIBUTE_UNUSED
, bfd
*input_bfd
,
3899 struct bfd_link_info
*info
)
3901 unsigned int bfd_indx
;
3902 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
3903 int stub_changed
= 0;
3904 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3906 /* We want to read in symbol extension records only once. To do this
3907 we need to read in the local symbols in parallel and save them for
3908 later use; so hold pointers to the local symbols in an array. */
3909 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
3910 all_local_syms
= bfd_zmalloc (amt
);
3911 htab
->all_local_syms
= all_local_syms
;
3912 if (all_local_syms
== NULL
)
3915 /* Walk over all the input BFDs, swapping in local symbols. */
3918 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3920 Elf_Internal_Shdr
*symtab_hdr
;
3922 /* We'll need the symbol table in a second. */
3923 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3924 if (symtab_hdr
->sh_info
== 0)
3927 /* We need an array of the local symbols attached to the input bfd. */
3928 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3929 if (local_syms
== NULL
)
3931 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
3932 symtab_hdr
->sh_info
, 0,
3934 /* Cache them for elf_link_input_bfd. */
3935 symtab_hdr
->contents
= (unsigned char *) local_syms
;
3937 if (local_syms
== NULL
)
3940 all_local_syms
[bfd_indx
] = local_syms
;
3943 return stub_changed
;
3946 /* Determine and set the size of the stub section for a final link.
3948 The basic idea here is to examine all the relocations looking for
3949 PC-relative calls to a target that is unreachable with a "CALLR"
3952 /* See elf32-hppa.c and elf64-ppc.c. */
3955 elf_metag_size_stubs(bfd
*output_bfd
, bfd
*stub_bfd
,
3956 struct bfd_link_info
*info
,
3957 bfd_signed_vma group_size
,
3958 asection
* (*add_stub_section
) (const char *, asection
*),
3959 void (*layout_sections_again
) (void))
3961 bfd_size_type stub_group_size
;
3962 bfd_boolean stubs_always_before_branch
;
3963 bfd_boolean stub_changed
;
3964 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3966 /* Stash our params away. */
3967 htab
->stub_bfd
= stub_bfd
;
3968 htab
->add_stub_section
= add_stub_section
;
3969 htab
->layout_sections_again
= layout_sections_again
;
3970 stubs_always_before_branch
= group_size
< 0;
3972 stub_group_size
= -group_size
;
3974 stub_group_size
= group_size
;
3975 if (stub_group_size
== 1)
3977 /* Default values. */
3978 /* FIXME: not sure what these values should be */
3979 if (stubs_always_before_branch
)
3981 stub_group_size
= (1 << BRANCH_BITS
);
3985 stub_group_size
= (1 << BRANCH_BITS
);
3989 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3991 switch (get_local_syms (output_bfd
, info
->input_bfds
, info
))
3994 if (htab
->all_local_syms
)
3995 goto error_ret_free_local
;
3999 stub_changed
= FALSE
;
4003 stub_changed
= TRUE
;
4010 unsigned int bfd_indx
;
4013 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4015 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
4017 Elf_Internal_Shdr
*symtab_hdr
;
4019 Elf_Internal_Sym
*local_syms
;
4021 /* We'll need the symbol table in a second. */
4022 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4023 if (symtab_hdr
->sh_info
== 0)
4026 local_syms
= htab
->all_local_syms
[bfd_indx
];
4028 /* Walk over each section attached to the input bfd. */
4029 for (section
= input_bfd
->sections
;
4031 section
= section
->next
)
4033 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4035 /* If there aren't any relocs, then there's nothing more
4037 if ((section
->flags
& SEC_RELOC
) == 0
4038 || section
->reloc_count
== 0)
4041 /* If this section is a link-once section that will be
4042 discarded, then don't create any stubs. */
4043 if (section
->output_section
== NULL
4044 || section
->output_section
->owner
!= output_bfd
)
4047 /* Get the relocs. */
4049 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
, NULL
,
4051 if (internal_relocs
== NULL
)
4052 goto error_ret_free_local
;
4054 /* Now examine each relocation. */
4055 irela
= internal_relocs
;
4056 irelaend
= irela
+ section
->reloc_count
;
4057 for (; irela
< irelaend
; irela
++)
4059 unsigned int r_type
, r_indx
;
4060 enum elf_metag_stub_type stub_type
;
4061 struct elf_metag_stub_hash_entry
*hsh
;
4064 bfd_vma destination
;
4065 struct elf_metag_link_hash_entry
*hh
;
4067 const asection
*id_sec
;
4069 r_type
= ELF32_R_TYPE (irela
->r_info
);
4070 r_indx
= ELF32_R_SYM (irela
->r_info
);
4072 if (r_type
>= (unsigned int) R_METAG_MAX
)
4074 bfd_set_error (bfd_error_bad_value
);
4075 error_ret_free_internal
:
4076 if (elf_section_data (section
)->relocs
== NULL
)
4077 free (internal_relocs
);
4078 goto error_ret_free_local
;
4081 /* Only look for stubs on CALLR and B instructions. */
4082 if (!(r_type
== (unsigned int) R_METAG_RELBRANCH
||
4083 r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
))
4086 /* Now determine the call target, its name, value,
4092 if (r_indx
< symtab_hdr
->sh_info
)
4094 /* It's a local symbol. */
4095 Elf_Internal_Sym
*sym
;
4096 Elf_Internal_Shdr
*hdr
;
4099 sym
= local_syms
+ r_indx
;
4100 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4101 sym_value
= sym
->st_value
;
4102 shndx
= sym
->st_shndx
;
4103 if (shndx
< elf_numsections (input_bfd
))
4105 hdr
= elf_elfsections (input_bfd
)[shndx
];
4106 sym_sec
= hdr
->bfd_section
;
4107 destination
= (sym_value
+ irela
->r_addend
4108 + sym_sec
->output_offset
4109 + sym_sec
->output_section
->vma
);
4114 /* It's an external symbol. */
4117 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4118 hh
= ((struct elf_metag_link_hash_entry
*)
4119 elf_sym_hashes (input_bfd
)[e_indx
]);
4121 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
4122 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
4123 hh
= ((struct elf_metag_link_hash_entry
*)
4124 hh
->eh
.root
.u
.i
.link
);
4126 if (hh
->eh
.root
.type
== bfd_link_hash_defined
4127 || hh
->eh
.root
.type
== bfd_link_hash_defweak
)
4129 sym_sec
= hh
->eh
.root
.u
.def
.section
;
4130 sym_value
= hh
->eh
.root
.u
.def
.value
;
4131 if (hh
->eh
.plt
.offset
!= (bfd_vma
) -1
4132 && hh
->eh
.dynindx
!= -1
4133 && r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
)
4135 sym_sec
= htab
->splt
;
4136 sym_value
= hh
->eh
.plt
.offset
;
4139 if (sym_sec
->output_section
!= NULL
)
4140 destination
= (sym_value
+ irela
->r_addend
4141 + sym_sec
->output_offset
4142 + sym_sec
->output_section
->vma
);
4146 else if (hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
4151 else if (hh
->eh
.root
.type
== bfd_link_hash_undefined
)
4153 if (! (info
->unresolved_syms_in_objects
== RM_IGNORE
4154 && (ELF_ST_VISIBILITY (hh
->eh
.other
)
4160 bfd_set_error (bfd_error_bad_value
);
4161 goto error_ret_free_internal
;
4165 /* Determine what (if any) linker stub is needed. */
4166 stub_type
= metag_type_of_stub (section
, irela
, hh
,
4168 if (stub_type
== metag_stub_none
)
4171 /* Support for grouping stub sections. */
4172 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4174 /* Get the name of this stub. */
4175 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, irela
);
4177 goto error_ret_free_internal
;
4179 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
4184 /* The proper stub has already been created. */
4189 hsh
= metag_add_stub (stub_name
, section
, htab
);
4193 goto error_ret_free_internal
;
4195 hsh
->target_value
= sym_value
;
4196 hsh
->target_section
= sym_sec
;
4197 hsh
->stub_type
= stub_type
;
4199 hsh
->addend
= irela
->r_addend
;
4200 stub_changed
= TRUE
;
4203 /* We're done with the internal relocs, free them. */
4204 if (elf_section_data (section
)->relocs
== NULL
)
4205 free (internal_relocs
);
4212 /* OK, we've added some stubs. Find out the new size of the
4214 for (stub_sec
= htab
->stub_bfd
->sections
;
4216 stub_sec
= stub_sec
->next
)
4219 bfd_hash_traverse (&htab
->bstab
, metag_size_one_stub
, htab
);
4221 /* Ask the linker to do its stuff. */
4222 (*htab
->layout_sections_again
) ();
4223 stub_changed
= FALSE
;
4226 free (htab
->all_local_syms
);
4229 error_ret_free_local
:
4230 free (htab
->all_local_syms
);
4234 /* Build all the stubs associated with the current output file. The
4235 stubs are kept in a hash table attached to the main linker hash
4236 table. This function is called via metagelf_finish in the linker. */
4239 elf_metag_build_stubs (struct bfd_link_info
*info
)
4242 struct bfd_hash_table
*table
;
4243 struct elf_metag_link_hash_table
*htab
;
4245 htab
= metag_link_hash_table (info
);
4247 for (stub_sec
= htab
->stub_bfd
->sections
;
4249 stub_sec
= stub_sec
->next
)
4253 /* Allocate memory to hold the linker stubs. */
4254 size
= stub_sec
->size
;
4255 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4256 if (stub_sec
->contents
== NULL
&& size
!= 0)
4261 /* Build the stubs as directed by the stub hash table. */
4262 table
= &htab
->bstab
;
4263 bfd_hash_traverse (table
, metag_build_one_stub
, info
);
4268 /* Return TRUE if SYM represents a local label symbol. */
4271 elf_metag_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
4273 if (name
[0] == '$' && name
[1] == 'L')
4275 return _bfd_elf_is_local_label_name (abfd
, name
);
4278 /* Return address for Ith PLT stub in section PLT, for relocation REL
4279 or (bfd_vma) -1 if it should not be included. */
4282 elf_metag_plt_sym_val (bfd_vma i
, const asection
*plt
,
4283 const arelent
*rel ATTRIBUTE_UNUSED
)
4285 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4288 #define ELF_ARCH bfd_arch_metag
4289 #define ELF_TARGET_ID METAG_ELF_DATA
4290 #define ELF_MACHINE_CODE EM_METAG
4291 #define ELF_MINPAGESIZE 0x1000
4292 #define ELF_MAXPAGESIZE 0x4000
4293 #define ELF_COMMONPAGESIZE 0x1000
4295 #define TARGET_LITTLE_SYM metag_elf32_vec
4296 #define TARGET_LITTLE_NAME "elf32-metag"
4298 #define elf_symbol_leading_char '_'
4300 #define elf_info_to_howto_rel NULL
4301 #define elf_info_to_howto metag_info_to_howto_rela
4303 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4304 #define bfd_elf32_bfd_link_hash_table_create \
4305 elf_metag_link_hash_table_create
4306 #define elf_backend_relocate_section elf_metag_relocate_section
4307 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4308 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4309 #define elf_backend_check_relocs elf_metag_check_relocs
4310 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4311 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4312 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4313 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4314 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4315 #define elf_backend_omit_section_dynsym \
4316 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4317 #define elf_backend_post_process_headers elf_metag_post_process_headers
4318 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4319 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4320 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4322 #define elf_backend_can_gc_sections 1
4323 #define elf_backend_can_refcount 1
4324 #define elf_backend_got_header_size 12
4325 #define elf_backend_rela_normal 1
4326 #define elf_backend_want_got_sym 0
4327 #define elf_backend_want_plt_sym 0
4328 #define elf_backend_plt_readonly 1
4330 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4331 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4333 #include "elf32-target.h"