1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2016 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
37 static const unsigned int plt0_entry
[] =
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
46 static const unsigned int plt0_pic_entry
[] =
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
55 static const unsigned int plt_entry
[] =
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
64 static const unsigned int plt_pic_entry
[] =
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
89 elf_metag_dyn_reloc_entry "hdh"
91 Always remember to use GNU Coding Style. */
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
95 static reloc_howto_type elf_metag_howto_table
[] =
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16
, /* type */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
102 FALSE
, /* pc_relative */
104 complain_overflow_dont
, /* complain_on_overflow */
105 bfd_elf_generic_reloc
, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE
, /* partial_inplace */
109 0x0007fff8, /* dst_mask */
110 FALSE
), /* pcrel_offset */
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16
, /* type */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
117 FALSE
, /* pc_relative */
119 complain_overflow_dont
,/* complain_on_overflow */
120 bfd_elf_generic_reloc
, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE
, /* partial_inplace */
124 0x0007fff8, /* dst_mask */
125 FALSE
), /* pcrel_offset */
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32
, /* type */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
132 FALSE
, /* pc_relative */
134 complain_overflow_bitfield
, /* complain_on_overflow */
135 bfd_elf_generic_reloc
, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE
, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE
), /* pcrel_offset */
143 HOWTO (R_METAG_NONE
, /* type */
145 3, /* size (0 = byte, 1 = short, 2 = long) */
147 FALSE
, /* pc_relative */
149 complain_overflow_dont
, /* complain_on_overflow */
150 bfd_elf_generic_reloc
, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE
, /* partial_inplace */
155 FALSE
), /* pcrel_offset */
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH
, /* type */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
162 TRUE
, /* pc_relative */
164 complain_overflow_signed
, /* complain_on_overflow */
165 bfd_elf_generic_reloc
, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE
, /* partial_inplace */
169 0x00ffffe0, /* dst_mask */
170 FALSE
), /* pcrel_offset */
173 HOWTO (R_METAG_GETSETOFF
, /* type */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
177 FALSE
, /* pc_relative */
179 complain_overflow_dont
, /* complain_on_overflow */
180 bfd_elf_generic_reloc
, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE
, /* partial_inplace */
185 FALSE
), /* pcrel_offset */
212 HOWTO (R_METAG_GNU_VTINHERIT
, /* type */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
216 FALSE
, /* pc_relative */
218 complain_overflow_dont
, /* complain_on_overflow */
219 NULL
, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE
, /* partial_inplace */
224 FALSE
), /* pcrel_offset */
226 HOWTO (R_METAG_GNU_VTENTRY
, /* type */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
230 FALSE
, /* pc_relative */
232 complain_overflow_dont
, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE
, /* partial_inplace */
238 FALSE
), /* pcrel_offset */
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF
, /* type */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
245 FALSE
, /* pc_relative */
247 complain_overflow_dont
, /* complain_on_overflow */
248 bfd_elf_generic_reloc
, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE
, /* partial_inplace */
252 0x0007fff8, /* dst_mask */
253 FALSE
), /* pcrel_offset */
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF
, /* type */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
260 FALSE
, /* pc_relative */
262 complain_overflow_dont
, /* complain_on_overflow */
263 bfd_elf_generic_reloc
, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE
, /* partial_inplace */
267 0x0007fff8, /* dst_mask */
268 FALSE
), /* pcrel_offset */
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF
, /* type */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
275 FALSE
, /* pc_relative */
277 complain_overflow_dont
, /* complain_on_overflow */
278 bfd_elf_generic_reloc
, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE
, /* partial_inplace */
283 FALSE
), /* pcrel_offset */
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT
, /* type */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
290 FALSE
, /* pc_relative */
292 complain_overflow_dont
, /* complain_on_overflow */
293 bfd_elf_generic_reloc
, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE
, /* partial_inplace */
298 FALSE
), /* pcrel_offset */
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC
, /* type */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
305 FALSE
, /* pc_relative */
307 complain_overflow_dont
, /* complain_on_overflow */
308 bfd_elf_generic_reloc
, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE
, /* partial_inplace */
312 0x0007fff8, /* dst_mask */
313 FALSE
), /* pcrel_offset */
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC
, /* type */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
320 FALSE
, /* pc_relative */
322 complain_overflow_dont
, /* complain_on_overflow */
323 bfd_elf_generic_reloc
, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE
, /* partial_inplace */
327 0x0007fff8, /* dst_mask */
328 FALSE
), /* pcrel_offset */
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT
, /* type */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
335 FALSE
, /* pc_relative */
337 complain_overflow_dont
, /* complain_on_overflow */
338 bfd_elf_generic_reloc
, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE
, /* partial_inplace */
342 0x0007fff8, /* dst_mask */
343 FALSE
), /* pcrel_offset */
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT
, /* type */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
350 FALSE
, /* pc_relative */
352 complain_overflow_dont
, /* complain_on_overflow */
353 bfd_elf_generic_reloc
, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE
, /* partial_inplace */
357 0xffffffff, /* dst_mask */
358 FALSE
), /* pcrel_offset */
360 HOWTO (R_METAG_RELBRANCH_PLT
, /* type */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
364 TRUE
, /* pc_relative */
366 complain_overflow_signed
, /* complain_on_overflow */
367 bfd_elf_generic_reloc
, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE
, /* partial_inplace */
371 0x00ffffe0, /* dst_mask */
372 FALSE
), /* pcrel_offset */
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF
, /* type */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 FALSE
, /* pc_relative */
381 complain_overflow_bitfield
, /* complain_on_overflow */
382 bfd_elf_generic_reloc
, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE
, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE
), /* pcrel_offset */
389 HOWTO (R_METAG_PLT
, /* type */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_bitfield
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE
, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY
, /* type */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
412 FALSE
, /* pc_relative */
414 complain_overflow_bitfield
, /* complain_on_overflow */
415 bfd_elf_generic_reloc
, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE
, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE
), /* pcrel_offset */
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT
, /* type */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
427 FALSE
, /* pc_relative */
429 complain_overflow_bitfield
, /* complain_on_overflow */
430 bfd_elf_generic_reloc
, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE
, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE
), /* pcrel_offset */
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
440 HOWTO (R_METAG_RELATIVE
, /* type */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
444 FALSE
, /* pc_relative */
446 complain_overflow_bitfield
, /* complain_on_overflow */
447 bfd_elf_generic_reloc
, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE
, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE
), /* pcrel_offset */
454 HOWTO (R_METAG_GLOB_DAT
, /* type */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
458 FALSE
, /* pc_relative */
460 complain_overflow_bitfield
, /* complain_on_overflow */
461 bfd_elf_generic_reloc
, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE
, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE
), /* pcrel_offset */
468 HOWTO (R_METAG_TLS_GD
, /* type */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
472 FALSE
, /* pc_relative */
474 complain_overflow_dont
, /* complain_on_overflow */
475 bfd_elf_generic_reloc
, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE
, /* partial_inplace */
479 0x0007fff8, /* dst_mask */
480 FALSE
), /* pcrel_offset */
482 HOWTO (R_METAG_TLS_LDM
, /* type */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
486 FALSE
, /* pc_relative */
488 complain_overflow_bitfield
, /* complain_on_overflow */
489 bfd_elf_generic_reloc
, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE
, /* partial_inplace */
493 0x0007fff8, /* dst_mask */
494 FALSE
), /* pcrel_offset */
496 HOWTO (R_METAG_TLS_LDO_HI16
, /* type */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
500 FALSE
, /* pc_relative */
502 complain_overflow_bitfield
, /* complain_on_overflow */
503 bfd_elf_generic_reloc
, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE
, /* partial_inplace */
507 0x0007fff8, /* dst_mask */
508 FALSE
), /* pcrel_offset */
510 HOWTO (R_METAG_TLS_LDO_LO16
, /* type */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
514 FALSE
, /* pc_relative */
516 complain_overflow_bitfield
, /* complain_on_overflow */
517 bfd_elf_generic_reloc
, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE
, /* partial_inplace */
521 0x0007fff8, /* dst_mask */
522 FALSE
), /* pcrel_offset */
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO
, /* type */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
529 FALSE
, /* pc_relative */
531 complain_overflow_bitfield
, /* complain_on_overflow */
532 bfd_elf_generic_reloc
, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE
, /* partial_inplace */
536 0x0007fff8, /* dst_mask */
537 FALSE
), /* pcrel_offset */
539 HOWTO (R_METAG_TLS_IE
, /* type */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
543 FALSE
, /* pc_relative */
545 complain_overflow_dont
, /* complain_on_overflow */
546 bfd_elf_generic_reloc
, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE
, /* partial_inplace */
550 0x0007ff80, /* dst_mask */
551 FALSE
), /* pcrel_offset */
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC
, /* type */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
558 FALSE
, /* pc_relative */
560 complain_overflow_dont
, /* complain_on_overflow */
561 bfd_elf_generic_reloc
, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE
, /* partial_inplace */
565 0x0007fff8, /* dst_mask */
566 FALSE
), /* pcrel_offset */
568 HOWTO (R_METAG_TLS_IENONPIC_HI16
,/* type */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
572 FALSE
, /* pc_relative */
574 complain_overflow_dont
, /* complain_on_overflow */
575 bfd_elf_generic_reloc
, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE
, /* partial_inplace */
579 0x0007fff8, /* dst_mask */
580 FALSE
), /* pcrel_offset */
582 HOWTO (R_METAG_TLS_IENONPIC_LO16
,/* type */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
586 FALSE
, /* pc_relative */
588 complain_overflow_dont
, /* complain_on_overflow */
589 bfd_elf_generic_reloc
, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE
, /* partial_inplace */
593 0x0007fff8, /* dst_mask */
594 FALSE
), /* pcrel_offset */
596 HOWTO (R_METAG_TLS_TPOFF
, /* type */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
600 FALSE
, /* pc_relative */
602 complain_overflow_bitfield
, /* complain_on_overflow */
603 bfd_elf_generic_reloc
, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE
, /* partial_inplace */
607 0xffffffff, /* dst_mask */
608 FALSE
), /* pcrel_offset */
610 HOWTO (R_METAG_TLS_DTPMOD
, /* type */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
614 FALSE
, /* pc_relative */
616 complain_overflow_bitfield
, /* complain_on_overflow */
617 bfd_elf_generic_reloc
, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE
, /* partial_inplace */
621 0xffffffff, /* dst_mask */
622 FALSE
), /* pcrel_offset */
624 HOWTO (R_METAG_TLS_DTPOFF
, /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 FALSE
, /* pc_relative */
630 complain_overflow_bitfield
, /* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE
, /* partial_inplace */
635 0xffffffff, /* dst_mask */
636 FALSE
), /* pcrel_offset */
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE
, /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 FALSE
, /* pc_relative */
645 complain_overflow_bitfield
, /* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE
, /* partial_inplace */
650 0xffffffff, /* dst_mask */
651 FALSE
), /* pcrel_offset */
653 HOWTO (R_METAG_TLS_LE_HI16
, /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 FALSE
, /* pc_relative */
659 complain_overflow_dont
, /* complain_on_overflow */
660 bfd_elf_generic_reloc
, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE
, /* partial_inplace */
664 0x0007fff8, /* dst_mask */
665 FALSE
), /* pcrel_offset */
667 HOWTO (R_METAG_TLS_LE_LO16
, /* type */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
671 FALSE
, /* pc_relative */
673 complain_overflow_dont
, /* complain_on_overflow */
674 bfd_elf_generic_reloc
, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE
, /* partial_inplace */
678 0x0007fff8, /* dst_mask */
679 FALSE
), /* pcrel_offset */
683 #define BRANCH_BITS 19
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
696 struct metag_reloc_map
698 bfd_reloc_code_real_type bfd_reloc_val
;
699 unsigned int metag_reloc_val
;
702 static const struct metag_reloc_map metag_reloc_map
[] =
704 { BFD_RELOC_NONE
, R_METAG_NONE
},
705 { BFD_RELOC_32
, R_METAG_ADDR32
},
706 { BFD_RELOC_METAG_HIADDR16
, R_METAG_HIADDR16
},
707 { BFD_RELOC_METAG_LOADDR16
, R_METAG_LOADDR16
},
708 { BFD_RELOC_METAG_RELBRANCH
, R_METAG_RELBRANCH
},
709 { BFD_RELOC_METAG_GETSETOFF
, R_METAG_GETSETOFF
},
710 { BFD_RELOC_VTABLE_INHERIT
, R_METAG_GNU_VTINHERIT
},
711 { BFD_RELOC_VTABLE_ENTRY
, R_METAG_GNU_VTENTRY
},
712 { BFD_RELOC_METAG_REL8
, R_METAG_REL8
},
713 { BFD_RELOC_METAG_REL16
, R_METAG_REL16
},
714 { BFD_RELOC_METAG_HI16_GOTOFF
, R_METAG_HI16_GOTOFF
},
715 { BFD_RELOC_METAG_LO16_GOTOFF
, R_METAG_LO16_GOTOFF
},
716 { BFD_RELOC_METAG_GETSET_GOTOFF
, R_METAG_GETSET_GOTOFF
},
717 { BFD_RELOC_METAG_GETSET_GOT
, R_METAG_GETSET_GOT
},
718 { BFD_RELOC_METAG_HI16_GOTPC
, R_METAG_HI16_GOTPC
},
719 { BFD_RELOC_METAG_LO16_GOTPC
, R_METAG_LO16_GOTPC
},
720 { BFD_RELOC_METAG_HI16_PLT
, R_METAG_HI16_PLT
},
721 { BFD_RELOC_METAG_LO16_PLT
, R_METAG_LO16_PLT
},
722 { BFD_RELOC_METAG_RELBRANCH_PLT
, R_METAG_RELBRANCH_PLT
},
723 { BFD_RELOC_METAG_GOTOFF
, R_METAG_GOTOFF
},
724 { BFD_RELOC_METAG_PLT
, R_METAG_PLT
},
725 { BFD_RELOC_METAG_COPY
, R_METAG_COPY
},
726 { BFD_RELOC_METAG_JMP_SLOT
, R_METAG_JMP_SLOT
},
727 { BFD_RELOC_METAG_RELATIVE
, R_METAG_RELATIVE
},
728 { BFD_RELOC_METAG_GLOB_DAT
, R_METAG_GLOB_DAT
},
729 { BFD_RELOC_METAG_TLS_GD
, R_METAG_TLS_GD
},
730 { BFD_RELOC_METAG_TLS_LDM
, R_METAG_TLS_LDM
},
731 { BFD_RELOC_METAG_TLS_LDO_HI16
, R_METAG_TLS_LDO_HI16
},
732 { BFD_RELOC_METAG_TLS_LDO_LO16
, R_METAG_TLS_LDO_LO16
},
733 { BFD_RELOC_METAG_TLS_LDO
, R_METAG_TLS_LDO
},
734 { BFD_RELOC_METAG_TLS_IE
, R_METAG_TLS_IE
},
735 { BFD_RELOC_METAG_TLS_IENONPIC
, R_METAG_TLS_IENONPIC
},
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16
, R_METAG_TLS_IENONPIC_HI16
},
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16
, R_METAG_TLS_IENONPIC_LO16
},
738 { BFD_RELOC_METAG_TLS_TPOFF
, R_METAG_TLS_TPOFF
},
739 { BFD_RELOC_METAG_TLS_DTPMOD
, R_METAG_TLS_DTPMOD
},
740 { BFD_RELOC_METAG_TLS_DTPOFF
, R_METAG_TLS_DTPOFF
},
741 { BFD_RELOC_METAG_TLS_LE
, R_METAG_TLS_LE
},
742 { BFD_RELOC_METAG_TLS_LE_HI16
, R_METAG_TLS_LE_HI16
},
743 { BFD_RELOC_METAG_TLS_LE_LO16
, R_METAG_TLS_LE_LO16
},
746 enum elf_metag_stub_type
748 metag_stub_long_branch
,
749 metag_stub_long_branch_shared
,
753 struct elf_metag_stub_hash_entry
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root
;
758 /* The stub section. */
761 /* Offset within stub_sec of the beginning of this stub. */
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value
;
767 asection
*target_section
;
769 enum elf_metag_stub_type stub_type
;
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry
*hh
;
774 /* And the reloc addend that this was derived from. */
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
782 struct elf_metag_link_hash_entry
784 struct elf_link_hash_entry eh
;
786 /* A pointer to the most recently used stub hash entry against this
788 struct elf_metag_stub_hash_entry
*hsh_cache
;
790 /* Used to count relocations for delayed sizing of relocation
792 struct elf_metag_dyn_reloc_entry
{
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry
*hdh_next
;
797 /* The input section of the reloc. */
800 /* Number of relocs copied in this section. */
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count
;
809 GOT_UNKNOWN
= 0, GOT_NORMAL
= 1, GOT_TLS_IE
= 2, GOT_TLS_LDM
= 4, GOT_TLS_GD
= 8
813 struct elf_metag_link_hash_table
815 /* The main hash table. */
816 struct elf_link_hash_table etab
;
818 /* The stub hash table. */
819 struct bfd_hash_table bstab
;
821 /* Linker stub bfd. */
824 /* Linker call-backs. */
825 asection
* (*add_stub_section
) (const char *, asection
*);
826 void (*layout_sections_again
) (void);
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
832 /* This is the section to which stubs in the group will be
835 /* The stub section. */
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count
;
841 unsigned int top_index
;
842 asection
**input_list
;
843 Elf_Internal_Sym
**all_local_syms
;
845 /* Short-cuts to get to dynamic linker sections. */
854 /* Small local sym cache. */
855 struct sym_cache sym_cache
;
857 /* Data for LDM relocations. */
860 bfd_signed_vma refcount
;
865 /* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
869 dtpoff_base (struct bfd_link_info
*info
)
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info
)->tls_sec
== NULL
)
874 return elf_hash_table (info
)->tls_sec
->vma
;
877 /* Return the relocation value for R_METAG_TLS_IE */
879 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info
)->tls_sec
== NULL
)
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address
- elf_hash_table (info
)->tls_sec
->vma
887 + align_power ((bfd_vma
) 8,
888 elf_hash_table (info
)->tls_sec
->alignment_power
));
892 metag_info_to_howto_rela (bfd
*abfd ATTRIBUTE_UNUSED
,
894 Elf_Internal_Rela
*dst
)
898 r_type
= ELF32_R_TYPE (dst
->r_info
);
899 if (r_type
>= (unsigned int) R_METAG_MAX
)
901 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd
, r_type
);
904 cache_ptr
->howto
= & elf_metag_howto_table
[r_type
];
907 static reloc_howto_type
*
908 metag_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
909 bfd_reloc_code_real_type code
)
913 for (i
= 0; i
< sizeof (metag_reloc_map
) / sizeof (metag_reloc_map
[0]); i
++)
914 if (metag_reloc_map
[i
].bfd_reloc_val
== code
)
915 return & elf_metag_howto_table
[metag_reloc_map
[i
].metag_reloc_val
];
920 static reloc_howto_type
*
921 metag_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
926 for (i
= 0; i
< sizeof (elf_metag_howto_table
) / sizeof (elf_metag_howto_table
[0]); i
++)
927 if (elf_metag_howto_table
[i
].name
!= NULL
928 && strcasecmp (elf_metag_howto_table
[i
].name
, r_name
) == 0)
929 return &elf_metag_howto_table
[i
];
934 /* Various hash macros and functions. */
935 #define metag_link_hash_table(p) \
936 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
937 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
939 #define metag_elf_hash_entry(ent) \
940 ((struct elf_metag_link_hash_entry *)(ent))
942 #define metag_stub_hash_entry(ent) \
943 ((struct elf_metag_stub_hash_entry *)(ent))
945 #define metag_stub_hash_lookup(table, string, create, copy) \
946 ((struct elf_metag_stub_hash_entry *) \
947 bfd_hash_lookup ((table), (string), (create), (copy)))
949 #define metag_elf_local_got_tls_type(abfd) \
950 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
952 /* Assorted hash table functions. */
954 /* Initialize an entry in the stub hash table. */
956 static struct bfd_hash_entry
*
957 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
958 struct bfd_hash_table
*table
,
961 /* Allocate the structure if it has not already been allocated by a
965 entry
= bfd_hash_allocate (table
,
966 sizeof (struct elf_metag_stub_hash_entry
));
971 /* Call the allocation method of the superclass. */
972 entry
= bfd_hash_newfunc (entry
, table
, string
);
975 struct elf_metag_stub_hash_entry
*hsh
;
977 /* Initialize the local fields. */
978 hsh
= (struct elf_metag_stub_hash_entry
*) entry
;
979 hsh
->stub_sec
= NULL
;
980 hsh
->stub_offset
= 0;
981 hsh
->target_value
= 0;
982 hsh
->target_section
= NULL
;
983 hsh
->stub_type
= metag_stub_long_branch
;
991 /* Initialize an entry in the link hash table. */
993 static struct bfd_hash_entry
*
994 metag_link_hash_newfunc (struct bfd_hash_entry
*entry
,
995 struct bfd_hash_table
*table
,
998 /* Allocate the structure if it has not already been allocated by a
1002 entry
= bfd_hash_allocate (table
,
1003 sizeof (struct elf_metag_link_hash_entry
));
1008 /* Call the allocation method of the superclass. */
1009 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1012 struct elf_metag_link_hash_entry
*hh
;
1014 /* Initialize the local fields. */
1015 hh
= (struct elf_metag_link_hash_entry
*) entry
;
1016 hh
->hsh_cache
= NULL
;
1017 hh
->dyn_relocs
= NULL
;
1018 hh
->tls_type
= GOT_UNKNOWN
;
1024 /* Free the derived linker hash table. */
1027 elf_metag_link_hash_table_free (bfd
*obfd
)
1029 struct elf_metag_link_hash_table
*htab
1030 = (struct elf_metag_link_hash_table
*) obfd
->link
.hash
;
1032 bfd_hash_table_free (&htab
->bstab
);
1033 _bfd_elf_link_hash_table_free (obfd
);
1036 /* Create the derived linker hash table. The Meta ELF port uses the derived
1037 hash table to keep information specific to the Meta ELF linker (without
1038 using static variables). */
1040 static struct bfd_link_hash_table
*
1041 elf_metag_link_hash_table_create (bfd
*abfd
)
1043 struct elf_metag_link_hash_table
*htab
;
1044 bfd_size_type amt
= sizeof (*htab
);
1046 htab
= bfd_zmalloc (amt
);
1050 if (!_bfd_elf_link_hash_table_init (&htab
->etab
, abfd
,
1051 metag_link_hash_newfunc
,
1052 sizeof (struct elf_metag_link_hash_entry
),
1059 /* Init the stub hash table too. */
1060 if (!bfd_hash_table_init (&htab
->bstab
, stub_hash_newfunc
,
1061 sizeof (struct elf_metag_stub_hash_entry
)))
1063 _bfd_elf_link_hash_table_free (abfd
);
1066 htab
->etab
.root
.hash_table_free
= elf_metag_link_hash_table_free
;
1068 return &htab
->etab
.root
;
1071 /* Section name for stubs is the associated section name plus this
1073 #define STUB_SUFFIX ".stub"
1075 /* Build a name for an entry in the stub hash table. */
1078 metag_stub_name (const asection
*input_section
,
1079 const asection
*sym_sec
,
1080 const struct elf_metag_link_hash_entry
*hh
,
1081 const Elf_Internal_Rela
*rel
)
1088 len
= 8 + 1 + strlen (hh
->eh
.root
.root
.string
) + 1 + 8 + 1;
1089 stub_name
= bfd_malloc (len
);
1090 if (stub_name
!= NULL
)
1092 sprintf (stub_name
, "%08x_%s+%x",
1093 input_section
->id
& 0xffffffff,
1094 hh
->eh
.root
.root
.string
,
1095 (int) rel
->r_addend
& 0xffffffff);
1100 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1101 stub_name
= bfd_malloc (len
);
1102 if (stub_name
!= NULL
)
1104 sprintf (stub_name
, "%08x_%x:%x+%x",
1105 input_section
->id
& 0xffffffff,
1106 sym_sec
->id
& 0xffffffff,
1107 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
1108 (int) rel
->r_addend
& 0xffffffff);
1114 /* Look up an entry in the stub hash. Stub entries are cached because
1115 creating the stub name takes a bit of time. */
1117 static struct elf_metag_stub_hash_entry
*
1118 metag_get_stub_entry (const asection
*input_section
,
1119 const asection
*sym_sec
,
1120 struct elf_metag_link_hash_entry
*hh
,
1121 const Elf_Internal_Rela
*rel
,
1122 struct elf_metag_link_hash_table
*htab
)
1124 struct elf_metag_stub_hash_entry
*hsh
;
1125 const asection
*id_sec
;
1127 /* If this input section is part of a group of sections sharing one
1128 stub section, then use the id of the first section in the group.
1129 Stub names need to include a section id, as there may well be
1130 more than one stub used to reach say, printf, and we need to
1131 distinguish between them. */
1132 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
1134 if (hh
!= NULL
&& hh
->hsh_cache
!= NULL
1135 && hh
->hsh_cache
->hh
== hh
1136 && hh
->hsh_cache
->id_sec
== id_sec
)
1138 hsh
= hh
->hsh_cache
;
1144 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, rel
);
1145 if (stub_name
== NULL
)
1148 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
1149 stub_name
, FALSE
, FALSE
);
1152 hh
->hsh_cache
= hsh
;
1160 /* Add a new stub entry to the stub hash. Not all fields of the new
1161 stub entry are initialised. */
1163 static struct elf_metag_stub_hash_entry
*
1164 metag_add_stub (const char *stub_name
,
1166 struct elf_metag_link_hash_table
*htab
)
1170 struct elf_metag_stub_hash_entry
*hsh
;
1172 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
1173 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
1174 if (stub_sec
== NULL
)
1176 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
1177 if (stub_sec
== NULL
)
1183 namelen
= strlen (link_sec
->name
);
1184 len
= namelen
+ sizeof (STUB_SUFFIX
);
1185 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
1189 memcpy (s_name
, link_sec
->name
, namelen
);
1190 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
1192 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
1193 if (stub_sec
== NULL
)
1195 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
1197 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
1200 /* Enter this entry into the linker stub hash table. */
1201 hsh
= metag_stub_hash_lookup (&htab
->bstab
, stub_name
,
1205 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1206 section
->owner
, stub_name
);
1210 hsh
->stub_sec
= stub_sec
;
1211 hsh
->stub_offset
= 0;
1212 hsh
->id_sec
= link_sec
;
1216 /* Check a signed integer value can be represented in the given number
1220 within_signed_range (int value
, unsigned int bits
)
1222 int min_val
= -(1 << (bits
- 1));
1223 int max_val
= (1 << (bits
- 1)) - 1;
1224 return (value
<= max_val
) && (value
>= min_val
);
1227 /* Perform a relocation as part of a final link. */
1229 static bfd_reloc_status_type
1230 metag_final_link_relocate (reloc_howto_type
*howto
,
1232 asection
*input_section
,
1234 Elf_Internal_Rela
*rel
,
1236 struct elf_metag_link_hash_entry
*hh
,
1237 struct elf_metag_link_hash_table
*htab
,
1240 bfd_reloc_status_type r
= bfd_reloc_ok
;
1241 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
1242 int opcode
, op_shift
, op_extended
, l1
, l2
;
1243 bfd_signed_vma srel
, addend
= rel
->r_addend
;
1244 struct elf_metag_stub_hash_entry
*hsh
= NULL
;
1247 /* Find out where we are and where we're going. */
1248 location
= (rel
->r_offset
+
1249 input_section
->output_offset
+
1250 input_section
->output_section
->vma
);
1252 switch (howto
->type
)
1254 case R_METAG_RELBRANCH
:
1255 case R_METAG_RELBRANCH_PLT
:
1256 /* Make it a pc relative offset. */
1257 relocation
-= location
;
1259 case R_METAG_TLS_GD
:
1260 case R_METAG_TLS_IE
:
1261 relocation
-= elf_gp (input_section
->output_section
->owner
);
1267 switch (howto
->type
)
1269 case R_METAG_RELBRANCH_PLT
:
1270 case R_METAG_RELBRANCH
:
1271 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1273 srel
= (bfd_signed_vma
) relocation
;
1276 /* If the branch is out of reach, then redirect the
1277 call to the local stub for this function. */
1278 if (srel
> ((1 << (BRANCH_BITS
+ 1)) - 1) ||
1279 (srel
< - (1 << (BRANCH_BITS
+ 1))))
1281 if (sym_sec
== NULL
)
1284 hsh
= metag_get_stub_entry (input_section
, sym_sec
,
1287 return bfd_reloc_undefined
;
1289 /* Munge up the value and addend so that we call the stub
1290 rather than the procedure directly. */
1291 srel
= (hsh
->stub_offset
1292 + hsh
->stub_sec
->output_offset
1293 + hsh
->stub_sec
->output_section
->vma
);
1299 if (!within_signed_range (srel
, BRANCH_BITS
))
1301 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1304 return bfd_reloc_overflow
;
1307 opcode
&= ~(0x7ffff << 5);
1308 opcode
|= ((srel
& 0x7ffff) << 5);
1310 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1312 case R_METAG_GETSETOFF
:
1313 case R_METAG_GETSET_GOT
:
1314 case R_METAG_GETSET_GOTOFF
:
1315 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1317 srel
= (bfd_signed_vma
) relocation
;
1320 /* Is this a standard or extended GET/SET? */
1321 if ((opcode
& 0xf0000000) == 0xa0000000)
1323 /* Extended GET/SET. */
1330 /* Standard GET/SET. */
1331 l1
= opcode
& 0x01000000;
1332 l2
= opcode
& 0x04000000;
1336 /* Calculate the width of the GET/SET and how much we need to
1337 shift the result by. */
1349 /* GET/SET offsets are scaled by the width of the transfer. */
1350 srel
= srel
>> op_shift
;
1352 /* Extended GET/SET has signed 12 bits of offset, standard has
1356 if (!within_signed_range (srel
, 12))
1358 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1361 return bfd_reloc_overflow
;
1363 opcode
&= ~(0xfff << 7);
1364 opcode
|= ((srel
& 0xfff) << 7);
1368 if (!within_signed_range (srel
, 5))
1370 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1373 return bfd_reloc_overflow
;
1375 opcode
&= ~(0x3f << 8);
1376 opcode
|= ((srel
& 0x3f) << 8);
1379 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1381 case R_METAG_TLS_GD
:
1382 case R_METAG_TLS_LDM
:
1383 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1385 if ((bfd_signed_vma
)relocation
< 0)
1387 /* sign extend immediate */
1388 if ((opcode
& 0xf2000001) == 0x02000000)
1390 /* ADD De.e,Dx.r,#I16 */
1394 return bfd_reloc_overflow
;
1397 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1399 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1400 contents
, rel
->r_offset
,
1401 relocation
, rel
->r_addend
);
1404 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1405 contents
, rel
->r_offset
,
1406 relocation
, rel
->r_addend
);
1412 /* This is defined because R_METAG_NONE != 0...
1413 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1414 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1415 rel, relend, howto, contents) \
1417 _bfd_clear_contents (howto, input_bfd, input_section, \
1418 contents + rel->r_offset); \
1420 if (bfd_link_relocatable (info) \
1421 && (input_section->flags & SEC_DEBUGGING)) \
1423 /* Only remove relocations in debug sections since other \
1424 sections may require relocations. */ \
1425 Elf_Internal_Shdr *rel_hdr; \
1427 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1429 /* Avoid empty output section. */ \
1430 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1432 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1433 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1434 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1436 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1438 input_section->reloc_count--; \
1445 rel->r_info = R_METAG_NONE; \
1446 rel->r_addend = 0; \
1450 /* Relocate a META ELF section.
1452 The RELOCATE_SECTION function is called by the new ELF backend linker
1453 to handle the relocations for a section.
1455 The relocs are always passed as Rela structures; if the section
1456 actually uses Rel structures, the r_addend field will always be
1459 This function is responsible for adjusting the section contents as
1460 necessary, and (if using Rela relocs and generating a relocatable
1461 output file) adjusting the reloc addend as necessary.
1463 This function does not have to worry about setting the reloc
1464 address or the reloc symbol index.
1466 LOCAL_SYMS is a pointer to the swapped in local symbols.
1468 LOCAL_SECTIONS is an array giving the section in the input file
1469 corresponding to the st_shndx field of each local symbol.
1471 The global hash table entry for the global symbols can be found
1472 via elf_sym_hashes (input_bfd).
1474 When generating relocatable output, this function must handle
1475 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1476 going to be the section symbol corresponding to the output
1477 section, which means that the addend must be adjusted
1481 elf_metag_relocate_section (bfd
*output_bfd
,
1482 struct bfd_link_info
*info
,
1484 asection
*input_section
,
1486 Elf_Internal_Rela
*relocs
,
1487 Elf_Internal_Sym
*local_syms
,
1488 asection
**local_sections
)
1490 bfd_vma
*local_got_offsets
;
1491 Elf_Internal_Shdr
*symtab_hdr
;
1492 struct elf_link_hash_entry
**eh_syms
;
1493 struct elf_metag_link_hash_table
*htab
;
1494 Elf_Internal_Rela
*rel
;
1495 Elf_Internal_Rela
*relend
;
1498 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1499 eh_syms
= elf_sym_hashes (input_bfd
);
1500 relend
= relocs
+ input_section
->reloc_count
;
1502 htab
= metag_link_hash_table (info
);
1503 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1507 for (rel
= relocs
; rel
< relend
; rel
++)
1509 reloc_howto_type
*howto
;
1510 unsigned long r_symndx
;
1511 Elf_Internal_Sym
*sym
;
1513 struct elf_metag_link_hash_entry
*hh
;
1515 bfd_reloc_status_type r
;
1519 r_type
= ELF32_R_TYPE (rel
->r_info
);
1521 if (r_type
== R_METAG_GNU_VTINHERIT
1522 || r_type
== R_METAG_GNU_VTENTRY
1523 || r_type
== R_METAG_NONE
)
1526 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1528 howto
= elf_metag_howto_table
+ ELF32_R_TYPE (rel
->r_info
);
1533 if (r_symndx
< symtab_hdr
->sh_info
)
1535 sym
= local_syms
+ r_symndx
;
1536 sec
= local_sections
[r_symndx
];
1537 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1539 name
= bfd_elf_string_from_elf_section
1540 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
1541 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
1545 struct elf_link_hash_entry
*eh
;
1546 bfd_boolean unresolved_reloc
, warned
, ignored
;
1548 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1549 r_symndx
, symtab_hdr
, eh_syms
,
1550 eh
, sec
, relocation
,
1551 unresolved_reloc
, warned
, ignored
);
1553 name
= eh
->root
.root
.string
;
1554 hh
= (struct elf_metag_link_hash_entry
*) eh
;
1557 if (sec
!= NULL
&& discarded_section (sec
))
1558 METAG_RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1559 rel
, relend
, howto
, contents
);
1561 if (bfd_link_relocatable (info
))
1566 case R_METAG_ADDR32
:
1567 case R_METAG_RELBRANCH
:
1568 if ((input_section
->flags
& SEC_ALLOC
) == 0)
1571 if ((bfd_link_pic (info
)
1572 && r_symndx
!= STN_UNDEF
1573 && (input_section
->flags
& SEC_ALLOC
) != 0
1574 && (r_type
!= R_METAG_RELBRANCH
1575 || !SYMBOL_CALLS_LOCAL (info
, &hh
->eh
)))
1576 || (!bfd_link_pic (info
)
1578 && hh
->eh
.dynindx
!= -1
1579 && !hh
->eh
.non_got_ref
1580 && ((hh
->eh
.def_dynamic
1581 && !hh
->eh
.def_regular
)
1582 || hh
->eh
.root
.type
== bfd_link_hash_undefweak
1583 || hh
->eh
.root
.type
== bfd_link_hash_undefined
)))
1585 Elf_Internal_Rela outrel
;
1586 bfd_boolean skip
, relocate
;
1589 /* When generating a shared object, these relocations
1590 are copied into the output file to be resolved at run
1593 sreloc
= elf_section_data (input_section
)->sreloc
;
1594 BFD_ASSERT (sreloc
!= NULL
);
1599 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
1603 if (outrel
.r_offset
== (bfd_vma
) -1)
1605 else if (outrel
.r_offset
== (bfd_vma
) -2)
1606 skip
= TRUE
, relocate
= TRUE
;
1607 outrel
.r_offset
+= (input_section
->output_section
->vma
1608 + input_section
->output_offset
);
1612 memset (&outrel
, 0, sizeof outrel
);
1613 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_NONE
);
1615 else if (r_type
== R_METAG_RELBRANCH
)
1617 BFD_ASSERT (hh
!= NULL
&& hh
->eh
.dynindx
!= -1);
1618 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1619 outrel
.r_addend
= rel
->r_addend
;
1623 /* h->dynindx may be -1 if this symbol was marked to
1626 || ((info
->symbolic
|| hh
->eh
.dynindx
== -1)
1627 && hh
->eh
.def_regular
))
1630 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1631 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1635 BFD_ASSERT (hh
->eh
.dynindx
!= -1);
1636 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1637 outrel
.r_addend
= rel
->r_addend
;
1641 loc
= sreloc
->contents
;
1642 loc
+= sreloc
->reloc_count
* sizeof(Elf32_External_Rela
);
1643 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,loc
);
1644 ++sreloc
->reloc_count
;
1646 /* If this reloc is against an external symbol, we do
1647 not want to fiddle with the addend. Otherwise, we
1648 need to include the symbol value so that it becomes
1649 an addend for the dynamic reloc. */
1655 case R_METAG_RELBRANCH_PLT
:
1656 /* Relocation is to the entry for this symbol in the
1657 procedure linkage table. */
1662 if (hh
->eh
.forced_local
)
1665 if (hh
->eh
.plt
.offset
== (bfd_vma
) -1 ||
1668 /* We didn't make a PLT entry for this symbol. This
1669 happens when statically linking PIC code, or when
1670 using -Bsymbolic. */
1674 relocation
= (htab
->splt
->output_section
->vma
1675 + htab
->splt
->output_offset
1676 + hh
->eh
.plt
.offset
);
1678 case R_METAG_HI16_GOTPC
:
1679 case R_METAG_LO16_GOTPC
:
1680 BFD_ASSERT (htab
->sgot
!= NULL
);
1682 relocation
= (htab
->sgot
->output_section
->vma
+
1683 htab
->sgot
->output_offset
);
1684 relocation
+= GOT_REG_OFFSET
;
1685 relocation
-= (input_section
->output_section
->vma
1686 + input_section
->output_offset
1689 case R_METAG_HI16_GOTOFF
:
1690 case R_METAG_LO16_GOTOFF
:
1691 case R_METAG_GETSET_GOTOFF
:
1692 BFD_ASSERT (htab
->sgot
!= NULL
);
1694 relocation
-= (htab
->sgot
->output_section
->vma
+
1695 htab
->sgot
->output_offset
);
1696 relocation
-= GOT_REG_OFFSET
;
1698 case R_METAG_GETSET_GOT
:
1701 bfd_boolean do_got
= 0;
1703 /* Relocation is to the entry for this symbol in the
1704 global offset table. */
1709 off
= hh
->eh
.got
.offset
;
1710 dyn
= htab
->etab
.dynamic_sections_created
;
1711 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1712 bfd_link_pic (info
),
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;
1752 if (bfd_link_pic (info
))
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
,
1800 bfd_link_pic (info
),
1802 && (!bfd_link_pic (info
)
1803 || !SYMBOL_REFERENCES_LOCAL (info
, &hh
->eh
)))
1805 indx
= hh
->eh
.dynindx
;
1807 off
= hh
->eh
.got
.offset
;
1808 tls_type
= hh
->tls_type
;
1812 /* Local symbol case. */
1813 if (local_got_offsets
== NULL
)
1816 off
= local_got_offsets
[r_symndx
];
1817 tls_type
= metag_elf_local_got_tls_type (input_bfd
) [r_symndx
];
1820 if (tls_type
== GOT_UNKNOWN
)
1827 bfd_boolean need_relocs
= FALSE
;
1828 Elf_Internal_Rela outrel
;
1829 bfd_byte
*loc
= NULL
;
1832 /* The GOT entries have not been initialized yet. Do it
1833 now, and emit any relocations. If both an IE GOT and a
1834 GD GOT are necessary, we emit the GD first. */
1836 if ((bfd_link_pic (info
) || indx
!= 0)
1838 || ELF_ST_VISIBILITY (hh
->eh
.other
) == STV_DEFAULT
1839 || hh
->eh
.root
.type
!= bfd_link_hash_undefweak
))
1842 loc
= htab
->srelgot
->contents
;
1843 /* FIXME (CAO): Should this be reloc_count++ ? */
1844 loc
+= htab
->srelgot
->reloc_count
* sizeof (Elf32_External_Rela
);
1847 if (tls_type
& GOT_TLS_GD
)
1851 outrel
.r_offset
= (cur_off
1852 + htab
->sgot
->output_section
->vma
1853 + htab
->sgot
->output_offset
);
1854 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_DTPMOD
);
1855 outrel
.r_addend
= 0;
1856 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ cur_off
);
1858 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1859 htab
->srelgot
->reloc_count
++;
1860 loc
+= sizeof (Elf32_External_Rela
);
1863 bfd_put_32 (output_bfd
, 0,
1864 htab
->sgot
->contents
+ cur_off
+ 4);
1867 bfd_put_32 (output_bfd
, 0,
1868 htab
->sgot
->contents
+ cur_off
+ 4);
1869 outrel
.r_info
= ELF32_R_INFO (indx
,
1870 R_METAG_TLS_DTPOFF
);
1871 outrel
.r_offset
+= 4;
1872 bfd_elf32_swap_reloca_out (output_bfd
,
1874 htab
->srelgot
->reloc_count
++;
1875 loc
+= sizeof (Elf32_External_Rela
);
1880 /* We don't support changing the TLS model. */
1887 if (tls_type
& GOT_TLS_IE
)
1891 outrel
.r_offset
= (cur_off
1892 + htab
->sgot
->output_section
->vma
1893 + htab
->sgot
->output_offset
);
1894 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_TPOFF
);
1897 outrel
.r_addend
= relocation
- dtpoff_base (info
);
1899 outrel
.r_addend
= 0;
1901 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1902 htab
->srelgot
->reloc_count
++;
1903 loc
+= sizeof (Elf32_External_Rela
);
1906 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
1907 htab
->sgot
->contents
+ cur_off
);
1913 hh
->eh
.got
.offset
|= 1;
1915 local_got_offsets
[r_symndx
] |= 1;
1918 /* Add the base of the GOT to the relocation value. */
1919 relocation
= off
- GOT_REG_OFFSET
;
1924 case R_METAG_TLS_IENONPIC_HI16
:
1925 case R_METAG_TLS_IENONPIC_LO16
:
1926 case R_METAG_TLS_LE_HI16
:
1927 case R_METAG_TLS_LE_LO16
:
1928 if (bfd_link_pic (info
))
1931 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1932 input_bfd
, input_section
,
1933 (long) rel
->r_offset
, howto
->name
);
1937 relocation
= tpoff (info
, relocation
);
1939 case R_METAG_TLS_LDO_HI16
:
1940 case R_METAG_TLS_LDO_LO16
:
1941 if (! bfd_link_pic (info
))
1942 relocation
= tpoff (info
, relocation
);
1944 relocation
-= dtpoff_base (info
);
1946 case R_METAG_TLS_LDM
:
1950 if (htab
->sgot
== NULL
)
1952 off
= htab
->tls_ldm_got
.offset
;
1957 Elf_Internal_Rela outrel
;
1960 outrel
.r_offset
= (off
1961 + htab
->sgot
->output_section
->vma
1962 + htab
->sgot
->output_offset
);
1964 outrel
.r_addend
= 0;
1965 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_TLS_DTPMOD
);
1966 loc
= htab
->srelgot
->contents
;
1967 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1968 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1969 htab
->tls_ldm_got
.offset
|= 1;
1972 relocation
= off
- GOT_REG_OFFSET
;
1979 r
= metag_final_link_relocate (howto
, input_bfd
, input_section
,
1980 contents
, rel
, relocation
, hh
, htab
,
1983 if (r
!= bfd_reloc_ok
)
1985 const char * msg
= (const char *) NULL
;
1989 case bfd_reloc_overflow
:
1990 (*info
->callbacks
->reloc_overflow
)
1991 (info
, (hh
? &hh
->eh
.root
: NULL
), name
, howto
->name
,
1992 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1995 case bfd_reloc_undefined
:
1996 (*info
->callbacks
->undefined_symbol
)
1997 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
2000 case bfd_reloc_outofrange
:
2001 msg
= _("internal error: out of range error");
2004 case bfd_reloc_notsupported
:
2005 msg
= _("internal error: unsupported relocation error");
2008 case bfd_reloc_dangerous
:
2009 msg
= _("internal error: dangerous relocation");
2013 msg
= _("internal error: unknown error");
2018 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
2019 input_section
, rel
->r_offset
);
2026 /* Create the .plt and .got sections, and set up our hash table
2027 short-cuts to various dynamic sections. */
2030 elf_metag_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
2032 struct elf_metag_link_hash_table
*htab
;
2033 struct elf_link_hash_entry
*eh
;
2034 struct bfd_link_hash_entry
*bh
;
2035 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2037 /* Don't try to create the .plt and .got twice. */
2038 htab
= metag_link_hash_table (info
);
2039 if (htab
->splt
!= NULL
)
2042 /* Call the generic code to do most of the work. */
2043 if (! _bfd_elf_create_dynamic_sections (abfd
, info
))
2046 htab
->sgot
= bfd_get_linker_section (abfd
, ".got");
2050 htab
->sgotplt
= bfd_make_section_with_flags (abfd
, ".got.plt",
2051 (SEC_ALLOC
| SEC_LOAD
|
2054 SEC_LINKER_CREATED
));
2055 if (htab
->sgotplt
== NULL
2056 || !bfd_set_section_alignment (abfd
, htab
->sgotplt
, 2))
2059 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2060 section. We don't do this in the linker script because we don't want
2061 to define the symbol if we are not creating a global offset table. */
2063 if (!(_bfd_generic_link_add_one_symbol
2064 (info
, abfd
, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL
, htab
->sgot
,
2065 (bfd_vma
) 0, NULL
, FALSE
, bed
->collect
, &bh
)))
2067 eh
= (struct elf_link_hash_entry
*) bh
;
2068 eh
->def_regular
= 1;
2069 eh
->type
= STT_OBJECT
;
2070 eh
->other
= STV_HIDDEN
;
2072 if (! bfd_link_executable (info
)
2073 && ! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2076 elf_hash_table (info
)->hgot
= eh
;
2078 htab
->splt
= bfd_get_linker_section (abfd
, ".plt");
2079 htab
->srelplt
= bfd_get_linker_section (abfd
, ".rela.plt");
2081 htab
->srelgot
= bfd_get_linker_section (abfd
, ".rela.got");
2083 htab
->sdynbss
= bfd_get_linker_section (abfd
, ".dynbss");
2084 htab
->srelbss
= bfd_get_linker_section (abfd
, ".rela.bss");
2089 /* Look through the relocs for a section during the first phase, and
2090 calculate needed space in the global offset table, procedure linkage
2091 table, and dynamic reloc sections. At this point we haven't
2092 necessarily read all the input files. */
2095 elf_metag_check_relocs (bfd
*abfd
,
2096 struct bfd_link_info
*info
,
2098 const Elf_Internal_Rela
*relocs
)
2100 Elf_Internal_Shdr
*symtab_hdr
;
2101 struct elf_link_hash_entry
**eh_syms
;
2102 const Elf_Internal_Rela
*rel
;
2103 const Elf_Internal_Rela
*rel_end
;
2104 struct elf_metag_link_hash_table
*htab
;
2107 int tls_type
= GOT_UNKNOWN
, old_tls_type
= GOT_UNKNOWN
;
2109 if (bfd_link_relocatable (info
))
2112 htab
= metag_link_hash_table (info
);
2113 dynobj
= htab
->etab
.dynobj
;
2114 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2115 eh_syms
= elf_sym_hashes (abfd
);
2121 rel_end
= relocs
+ sec
->reloc_count
;
2122 for (rel
= relocs
; rel
< rel_end
; rel
++)
2125 struct elf_metag_link_hash_entry
*hh
;
2126 Elf_Internal_Sym
*isym
;
2127 unsigned long r_symndx
;
2129 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2130 r_type
= ELF32_R_TYPE (rel
->r_info
);
2131 if (r_symndx
< symtab_hdr
->sh_info
)
2133 /* A local symbol. */
2134 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2145 hh
= (struct elf_metag_link_hash_entry
*)
2146 eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
2147 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
2148 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
2149 hh
= (struct elf_metag_link_hash_entry
*) hh
->eh
.root
.u
.i
.link
;
2151 /* PR15323, ref flags aren't set for references in the same
2153 hh
->eh
.root
.non_ir_ref
= 1;
2156 /* Some relocs require a global offset table. */
2157 if (htab
->sgot
== NULL
)
2161 case R_METAG_TLS_GD
:
2162 case R_METAG_TLS_LDM
:
2163 case R_METAG_TLS_IE
:
2164 if (bfd_link_pic (info
))
2165 info
->flags
|= DF_STATIC_TLS
;
2168 case R_METAG_HI16_GOTOFF
:
2169 case R_METAG_LO16_GOTOFF
:
2170 case R_METAG_GETSET_GOTOFF
:
2171 case R_METAG_GETSET_GOT
:
2172 case R_METAG_HI16_GOTPC
:
2173 case R_METAG_LO16_GOTPC
:
2175 htab
->etab
.dynobj
= dynobj
= abfd
;
2176 if (!elf_metag_create_dynamic_sections (dynobj
, info
))
2187 case R_METAG_TLS_IE
:
2188 case R_METAG_TLS_GD
:
2189 case R_METAG_GETSET_GOT
:
2193 tls_type
= GOT_NORMAL
;
2195 case R_METAG_TLS_IE
:
2196 tls_type
= GOT_TLS_IE
;
2198 case R_METAG_TLS_GD
:
2199 tls_type
= GOT_TLS_GD
;
2205 hh
->eh
.got
.refcount
+= 1;
2206 old_tls_type
= hh
->tls_type
;
2210 bfd_signed_vma
*local_got_refcounts
;
2212 /* This is a global offset table entry for a local
2214 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2215 if (local_got_refcounts
== NULL
)
2219 size
= symtab_hdr
->sh_info
;
2220 size
*= sizeof (bfd_signed_vma
);
2221 /* Add in space to store the local GOT TLS types. */
2222 size
+= symtab_hdr
->sh_info
;
2223 local_got_refcounts
= ((bfd_signed_vma
*)
2224 bfd_zalloc (abfd
, size
));
2225 if (local_got_refcounts
== NULL
)
2227 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2228 memset (metag_elf_local_got_tls_type (abfd
),
2229 GOT_UNKNOWN
, symtab_hdr
->sh_info
);
2231 local_got_refcounts
[r_symndx
] += 1;
2232 old_tls_type
= metag_elf_local_got_tls_type (abfd
) [r_symndx
];
2235 if (old_tls_type
!= tls_type
)
2239 hh
->tls_type
= tls_type
;
2243 metag_elf_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2249 case R_METAG_TLS_LDM
:
2250 metag_link_hash_table (info
)->tls_ldm_got
.refcount
+= 1;
2253 case R_METAG_RELBRANCH_PLT
:
2254 /* This symbol requires a procedure linkage table entry. We
2255 actually build the entry in adjust_dynamic_symbol,
2256 because this might be a case of linking PIC code without
2257 linking in any dynamic objects, in which case we don't
2258 need to generate a procedure linkage table after all. */
2260 /* If this is a local symbol, we resolve it directly without
2261 creating a procedure linkage table entry. */
2265 if (hh
->eh
.forced_local
)
2268 hh
->eh
.needs_plt
= 1;
2269 hh
->eh
.plt
.refcount
+= 1;
2272 case R_METAG_HIADDR16
:
2273 case R_METAG_LOADDR16
:
2274 /* Let's help debug shared library creation. These relocs
2275 cannot be used in shared libs. Don't error out for
2276 sections we don't care about, such as debug sections or
2277 non-constant sections. */
2278 if (bfd_link_pic (info
)
2279 && (sec
->flags
& SEC_ALLOC
) != 0
2280 && (sec
->flags
& SEC_READONLY
) != 0)
2285 name
= hh
->eh
.root
.root
.string
;
2287 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
2289 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2290 abfd
, elf_metag_howto_table
[r_type
].name
, name
);
2291 bfd_set_error (bfd_error_bad_value
);
2296 case R_METAG_ADDR32
:
2297 case R_METAG_RELBRANCH
:
2298 case R_METAG_GETSETOFF
:
2299 if (hh
!= NULL
&& !bfd_link_pic (info
))
2301 hh
->eh
.non_got_ref
= 1;
2302 hh
->eh
.plt
.refcount
+= 1;
2305 /* If we are creating a shared library, and this is a reloc
2306 against a global symbol, or a non PC relative reloc
2307 against a local symbol, then we need to copy the reloc
2308 into the shared library. However, if we are linking with
2309 -Bsymbolic, we do not need to copy a reloc against a
2310 global symbol which is defined in an object we are
2311 including in the link (i.e., DEF_REGULAR is set). At
2312 this point we have not seen all the input files, so it is
2313 possible that DEF_REGULAR is not set now but will be set
2314 later (it is never cleared). We account for that
2315 possibility below by storing information in the
2316 dyn_relocs field of the hash table entry. A similar
2317 situation occurs when creating shared libraries and symbol
2318 visibility changes render the symbol local.
2320 If on the other hand, we are creating an executable, we
2321 may need to keep relocations for symbols satisfied by a
2322 dynamic library if we manage to avoid copy relocs for the
2324 if ((bfd_link_pic (info
)
2325 && (sec
->flags
& SEC_ALLOC
) != 0
2326 && (r_type
!= R_METAG_RELBRANCH
2328 && (! info
->symbolic
2329 || hh
->eh
.root
.type
== bfd_link_hash_defweak
2330 || !hh
->eh
.def_regular
))))
2331 || (!bfd_link_pic (info
)
2332 && (sec
->flags
& SEC_ALLOC
) != 0
2334 && (hh
->eh
.root
.type
== bfd_link_hash_defweak
2335 || !hh
->eh
.def_regular
)))
2337 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2338 struct elf_metag_dyn_reloc_entry
**hdh_head
;
2341 htab
->etab
.dynobj
= dynobj
= abfd
;
2343 /* When creating a shared object, we must copy these
2344 relocs into the output file. We create a reloc
2345 section in dynobj and make room for the reloc. */
2348 sreloc
= _bfd_elf_make_dynamic_reloc_section
2349 (sec
, htab
->etab
.dynobj
, 2, abfd
, /*rela?*/ TRUE
);
2353 bfd_set_error (bfd_error_bad_value
);
2357 elf_section_data (sec
)->sreloc
= sreloc
;
2360 /* If this is a global symbol, we count the number of
2361 relocations we need for this symbol. */
2363 hdh_head
= &((struct elf_metag_link_hash_entry
*) hh
)->dyn_relocs
;
2366 /* Track dynamic relocs needed for local syms too. */
2370 sr
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2374 vpp
= &elf_section_data (sr
)->local_dynrel
;
2375 hdh_head
= (struct elf_metag_dyn_reloc_entry
**) vpp
;
2379 if (hdh_p
== NULL
|| hdh_p
->sec
!= sec
)
2381 hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2382 bfd_alloc (dynobj
, sizeof *hdh_p
));
2385 hdh_p
->hdh_next
= *hdh_head
;
2389 hdh_p
->relative_count
= 0;
2393 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
2394 hdh_p
->relative_count
+= 1;
2398 /* This relocation describes the C++ object vtable hierarchy.
2399 Reconstruct it for later use during GC. */
2400 case R_METAG_GNU_VTINHERIT
:
2401 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, &hh
->eh
,
2406 /* This relocation describes which C++ vtable entries are actually
2407 used. Record for later use during GC. */
2408 case R_METAG_GNU_VTENTRY
:
2409 BFD_ASSERT (hh
!= NULL
);
2411 && !bfd_elf_gc_record_vtentry (abfd
, sec
, &hh
->eh
, rel
->r_addend
))
2420 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2423 elf_metag_copy_indirect_symbol (struct bfd_link_info
*info
,
2424 struct elf_link_hash_entry
*eh_dir
,
2425 struct elf_link_hash_entry
*eh_ind
)
2427 struct elf_metag_link_hash_entry
*hh_dir
, *hh_ind
;
2429 hh_dir
= metag_elf_hash_entry (eh_dir
);
2430 hh_ind
= metag_elf_hash_entry (eh_ind
);
2432 if (hh_ind
->dyn_relocs
!= NULL
)
2434 if (hh_dir
->dyn_relocs
!= NULL
)
2436 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2437 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2439 if (eh_ind
->root
.type
== bfd_link_hash_indirect
)
2442 /* Add reloc counts against the weak sym to the strong sym
2443 list. Merge any entries against the same section. */
2444 for (hdh_pp
= &hh_ind
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2446 struct elf_metag_dyn_reloc_entry
*hdh_q
;
2448 for (hdh_q
= hh_dir
->dyn_relocs
; hdh_q
!= NULL
;
2449 hdh_q
= hdh_q
->hdh_next
)
2450 if (hdh_q
->sec
== hdh_p
->sec
)
2452 hdh_q
->relative_count
+= hdh_p
->relative_count
;
2453 hdh_q
->count
+= hdh_p
->count
;
2454 *hdh_pp
= hdh_p
->hdh_next
;
2458 hdh_pp
= &hdh_p
->hdh_next
;
2460 *hdh_pp
= hh_dir
->dyn_relocs
;
2463 hh_dir
->dyn_relocs
= hh_ind
->dyn_relocs
;
2464 hh_ind
->dyn_relocs
= NULL
;
2467 if (eh_ind
->root
.type
== bfd_link_hash_indirect
2468 && eh_dir
->got
.refcount
<= 0)
2470 hh_dir
->tls_type
= hh_ind
->tls_type
;
2471 hh_ind
->tls_type
= GOT_UNKNOWN
;
2474 _bfd_elf_link_hash_copy_indirect (info
, eh_dir
, eh_ind
);
2477 /* Adjust a symbol defined by a dynamic object and referenced by a
2478 regular object. The current definition is in some section of the
2479 dynamic object, but we're not including those sections. We have to
2480 change the definition to something the rest of the link can
2484 elf_metag_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2485 struct elf_link_hash_entry
*eh
)
2487 struct elf_metag_link_hash_table
*htab
;
2488 struct elf_metag_link_hash_entry
*hh
;
2489 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2492 /* If this is a function, put it in the procedure linkage table. We
2493 will fill in the contents of the procedure linkage table later,
2494 when we know the address of the .got section. */
2495 if (eh
->type
== STT_FUNC
2498 if (eh
->plt
.refcount
<= 0
2499 || SYMBOL_CALLS_LOCAL (info
, eh
)
2500 || (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
2501 && eh
->root
.type
== bfd_link_hash_undefweak
))
2503 /* This case can occur if we saw a PLT reloc in an input
2504 file, but the symbol was never referred to by a dynamic
2505 object. In such a case, we don't actually need to build
2506 a procedure linkage table, and we can just do a PCREL
2508 eh
->plt
.offset
= (bfd_vma
) -1;
2515 eh
->plt
.offset
= (bfd_vma
) -1;
2517 /* If this is a weak symbol, and there is a real definition, the
2518 processor independent code will have arranged for us to see the
2519 real definition first, and we can just use the same value. */
2520 if (eh
->u
.weakdef
!= NULL
)
2522 if (eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defined
2523 && eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defweak
)
2525 eh
->root
.u
.def
.section
= eh
->u
.weakdef
->root
.u
.def
.section
;
2526 eh
->root
.u
.def
.value
= eh
->u
.weakdef
->root
.u
.def
.value
;
2527 eh
->non_got_ref
= eh
->u
.weakdef
->non_got_ref
;
2531 /* This is a reference to a symbol defined by a dynamic object which
2532 is not a function. */
2534 /* If we are creating a shared library, we must presume that the
2535 only references to the symbol are via the global offset table.
2536 For such cases we need not do anything here; the relocations will
2537 be handled correctly by relocate_section. */
2538 if (bfd_link_pic (info
))
2541 /* If there are no references to this symbol that do not use the
2542 GOT, we don't need to generate a copy reloc. */
2543 if (!eh
->non_got_ref
)
2546 /* If -z nocopyreloc was given, we won't generate them either. */
2547 if (info
->nocopyreloc
)
2549 eh
->non_got_ref
= 0;
2553 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2554 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2556 s
= hdh_p
->sec
->output_section
;
2557 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2561 /* If we didn't find any dynamic relocs in read-only sections, then
2562 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2565 eh
->non_got_ref
= 0;
2569 /* We must allocate the symbol in our .dynbss section, which will
2570 become part of the .bss section of the executable. There will be
2571 an entry for this symbol in the .dynsym section. The dynamic
2572 object will contain position independent code, so all references
2573 from the dynamic object to this symbol will go through the global
2574 offset table. The dynamic linker will use the .dynsym entry to
2575 determine the address it must put in the global offset table, so
2576 both the dynamic object and the regular object will refer to the
2577 same memory location for the variable. */
2579 htab
= metag_link_hash_table (info
);
2581 /* We must generate a COPY reloc to tell the dynamic linker to
2582 copy the initial value out of the dynamic object and into the
2583 runtime process image. */
2584 if ((eh
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && eh
->size
!= 0)
2586 htab
->srelbss
->size
+= sizeof (Elf32_External_Rela
);
2592 return _bfd_elf_adjust_dynamic_copy (info
, eh
, s
);
2595 /* Allocate space in .plt, .got and associated reloc sections for
2599 allocate_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2601 struct bfd_link_info
*info
;
2602 struct elf_metag_link_hash_table
*htab
;
2603 struct elf_metag_link_hash_entry
*hh
;
2604 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2606 if (eh
->root
.type
== bfd_link_hash_indirect
)
2609 if (eh
->root
.type
== bfd_link_hash_warning
)
2610 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2613 htab
= metag_link_hash_table (info
);
2615 if (htab
->etab
.dynamic_sections_created
2616 && eh
->plt
.refcount
> 0)
2618 /* Make sure this symbol is output as a dynamic symbol.
2619 Undefined weak syms won't yet be marked as dynamic. */
2620 if (eh
->dynindx
== -1
2621 && !eh
->forced_local
)
2623 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2627 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), eh
))
2629 asection
*s
= htab
->splt
;
2631 /* If this is the first .plt entry, make room for the special
2634 s
->size
+= PLT_ENTRY_SIZE
;
2636 eh
->plt
.offset
= s
->size
;
2638 /* If this symbol is not defined in a regular file, and we are
2639 not generating a shared library, then set the symbol to this
2640 location in the .plt. This is required to make function
2641 pointers compare as equal between the normal executable and
2642 the shared library. */
2643 if (! bfd_link_pic (info
)
2644 && !eh
->def_regular
)
2646 eh
->root
.u
.def
.section
= s
;
2647 eh
->root
.u
.def
.value
= eh
->plt
.offset
;
2650 /* Make room for this entry. */
2651 s
->size
+= PLT_ENTRY_SIZE
;
2653 /* We also need to make an entry in the .got.plt section, which
2654 will be placed in the .got section by the linker script. */
2655 htab
->sgotplt
->size
+= 4;
2657 /* We also need to make an entry in the .rel.plt section. */
2658 htab
->srelplt
->size
+= sizeof (Elf32_External_Rela
);
2662 eh
->plt
.offset
= (bfd_vma
) -1;
2668 eh
->plt
.offset
= (bfd_vma
) -1;
2672 if (eh
->got
.refcount
> 0)
2676 int tls_type
= metag_elf_hash_entry (eh
)->tls_type
;
2678 /* Make sure this symbol is output as a dynamic symbol.
2679 Undefined weak syms won't yet be marked as dynamic. */
2680 if (eh
->dynindx
== -1
2681 && !eh
->forced_local
)
2683 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2689 eh
->got
.offset
= s
->size
;
2691 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2692 if (tls_type
== GOT_TLS_GD
)
2694 dyn
= htab
->etab
.dynamic_sections_created
;
2695 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2696 R_METAG_TLS_GD needs one if local symbol and two if global. */
2697 if ((tls_type
== GOT_TLS_GD
&& eh
->dynindx
== -1)
2698 || (tls_type
== GOT_TLS_IE
&& dyn
))
2699 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2700 else if (tls_type
== GOT_TLS_GD
)
2701 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rela
);
2702 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2703 bfd_link_pic (info
),
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
2719 if (bfd_link_pic (info
))
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 (bfd_link_executable (info
) && !info
->nointerp
)
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
)
2916 if (bfd_link_pic (info
))
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 (bfd_link_executable (info
))
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. */
3117 if (! bfd_link_pic (info
))
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. */
3201 if (bfd_link_pic (info
)
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
);
3329 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3330 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3335 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3336 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3341 dyn
.d_un
.d_val
= s
->size
;
3342 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3346 /* Don't count procedure linkage table relocs in the
3347 overall reloc count. */
3348 if (htab
->srelplt
) {
3350 dyn
.d_un
.d_val
-= s
->size
;
3352 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3356 /* We may not be using the standard ELF linker script.
3357 If .rela.plt is the first .rela section, we adjust
3358 DT_RELA to not include it. */
3359 if (htab
->srelplt
) {
3361 if (dyn
.d_un
.d_ptr
== s
->output_section
->vma
+ s
->output_offset
)
3362 dyn
.d_un
.d_ptr
+= s
->size
;
3364 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3370 /* Fill in the first entry in the procedure linkage table. */
3372 if (splt
&& splt
->size
> 0)
3375 /* addr = .got + 4 */
3376 addr
= htab
->sgot
->output_section
->vma
+
3377 htab
->sgot
->output_offset
+ 4;
3378 if (bfd_link_pic (info
))
3380 addr
-= splt
->output_section
->vma
+ splt
->output_offset
;
3381 bfd_put_32 (output_bfd
,
3382 plt0_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3384 bfd_put_32 (output_bfd
,
3385 plt0_pic_entry
[1] | ((addr
& 0xffff) << 3),
3386 splt
->contents
+ 4);
3387 bfd_put_32 (output_bfd
, plt0_pic_entry
[2], splt
->contents
+ 8);
3388 bfd_put_32 (output_bfd
, plt0_pic_entry
[3], splt
->contents
+ 12);
3389 bfd_put_32 (output_bfd
, plt0_pic_entry
[4], splt
->contents
+ 16);
3393 bfd_put_32 (output_bfd
,
3394 plt0_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3396 bfd_put_32 (output_bfd
,
3397 plt0_entry
[1] | ((addr
& 0xffff) << 3),
3398 splt
->contents
+ 4);
3399 bfd_put_32 (output_bfd
, plt0_entry
[2], splt
->contents
+ 8);
3400 bfd_put_32 (output_bfd
, plt0_entry
[3], splt
->contents
+ 12);
3401 bfd_put_32 (output_bfd
, plt0_entry
[4], splt
->contents
+ 16);
3404 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
=
3409 if (htab
->sgot
!= NULL
&& htab
->sgot
->size
!= 0)
3411 /* Fill in the first entry in the global offset table.
3412 We use it to point to our dynamic section, if we have one. */
3413 bfd_put_32 (output_bfd
,
3414 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0,
3415 htab
->sgot
->contents
);
3417 /* The second entry is reserved for use by the dynamic linker. */
3418 memset (htab
->sgot
->contents
+ GOT_ENTRY_SIZE
, 0, GOT_ENTRY_SIZE
);
3420 /* Set .got entry size. */
3421 elf_section_data (htab
->sgot
->output_section
)
3422 ->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3428 /* Return the section that should be marked against GC for a given
3432 elf_metag_gc_mark_hook (asection
*sec
,
3433 struct bfd_link_info
*info
,
3434 Elf_Internal_Rela
*rela
,
3435 struct elf_link_hash_entry
*hh
,
3436 Elf_Internal_Sym
*sym
)
3439 switch ((unsigned int) ELF32_R_TYPE (rela
->r_info
))
3441 case R_METAG_GNU_VTINHERIT
:
3442 case R_METAG_GNU_VTENTRY
:
3446 return _bfd_elf_gc_mark_hook (sec
, info
, rela
, hh
, sym
);
3449 /* Update the got and plt entry reference counts for the section being
3453 elf_metag_gc_sweep_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
3454 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3455 asection
*sec ATTRIBUTE_UNUSED
,
3456 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
3458 Elf_Internal_Shdr
*symtab_hdr
;
3459 struct elf_link_hash_entry
**eh_syms
;
3460 bfd_signed_vma
*local_got_refcounts
;
3461 bfd_signed_vma
*local_plt_refcounts
;
3462 const Elf_Internal_Rela
*rel
, *relend
;
3464 if (bfd_link_relocatable (info
))
3467 elf_section_data (sec
)->local_dynrel
= NULL
;
3469 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3470 eh_syms
= elf_sym_hashes (abfd
);
3471 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3472 local_plt_refcounts
= local_got_refcounts
;
3473 if (local_plt_refcounts
!= NULL
)
3474 local_plt_refcounts
+= symtab_hdr
->sh_info
;
3476 relend
= relocs
+ sec
->reloc_count
;
3477 for (rel
= relocs
; rel
< relend
; rel
++)
3479 unsigned long r_symndx
;
3480 unsigned int r_type
;
3481 struct elf_link_hash_entry
*eh
= NULL
;
3483 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3484 if (r_symndx
>= symtab_hdr
->sh_info
)
3486 struct elf_metag_link_hash_entry
*hh
;
3487 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3488 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3490 eh
= eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
3491 while (eh
->root
.type
== bfd_link_hash_indirect
3492 || eh
->root
.type
== bfd_link_hash_warning
)
3493 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
3494 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3496 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3497 hdh_pp
= &hdh_p
->hdh_next
)
3498 if (hdh_p
->sec
== sec
)
3500 /* Everything must go for SEC. */
3501 *hdh_pp
= hdh_p
->hdh_next
;
3506 r_type
= ELF32_R_TYPE (rel
->r_info
);
3509 case R_METAG_TLS_LDM
:
3510 if (metag_link_hash_table (info
)->tls_ldm_got
.refcount
> 0)
3511 metag_link_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
3513 case R_METAG_TLS_IE
:
3514 case R_METAG_TLS_GD
:
3515 case R_METAG_GETSET_GOT
:
3518 if (eh
->got
.refcount
> 0)
3519 eh
->got
.refcount
-= 1;
3521 else if (local_got_refcounts
!= NULL
)
3523 if (local_got_refcounts
[r_symndx
] > 0)
3524 local_got_refcounts
[r_symndx
] -= 1;
3528 case R_METAG_RELBRANCH_PLT
:
3531 if (eh
->plt
.refcount
> 0)
3532 eh
->plt
.refcount
-= 1;
3536 case R_METAG_ADDR32
:
3537 case R_METAG_HIADDR16
:
3538 case R_METAG_LOADDR16
:
3539 case R_METAG_GETSETOFF
:
3540 case R_METAG_RELBRANCH
:
3543 struct elf_metag_link_hash_entry
*hh
;
3544 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3545 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3547 if (!bfd_link_pic (info
) && eh
->plt
.refcount
> 0)
3548 eh
->plt
.refcount
-= 1;
3550 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3552 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3553 hdh_pp
= &hdh_p
->hdh_next
)
3554 if (hdh_p
->sec
== sec
)
3556 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
3557 hdh_p
->relative_count
-= 1;
3559 if (hdh_p
->count
== 0)
3560 *hdh_pp
= hdh_p
->hdh_next
;
3574 /* Determine the type of stub needed, if any, for a call. */
3576 static enum elf_metag_stub_type
3577 metag_type_of_stub (asection
*input_sec
,
3578 const Elf_Internal_Rela
*rel
,
3579 struct elf_metag_link_hash_entry
*hh
,
3580 bfd_vma destination
,
3581 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3584 bfd_vma branch_offset
;
3585 bfd_vma max_branch_offset
;
3588 !(hh
->eh
.root
.type
== bfd_link_hash_defined
3589 || hh
->eh
.root
.type
== bfd_link_hash_defweak
))
3590 return metag_stub_none
;
3592 /* Determine where the call point is. */
3593 location
= (input_sec
->output_offset
3594 + input_sec
->output_section
->vma
3597 branch_offset
= destination
- location
;
3599 /* Determine if a long branch stub is needed. Meta branch offsets
3600 are signed 19 bits 4 byte aligned. */
3601 max_branch_offset
= (1 << (BRANCH_BITS
-1)) << 2;
3603 if (branch_offset
+ max_branch_offset
>= 2*max_branch_offset
)
3605 if (bfd_link_pic (info
))
3606 return metag_stub_long_branch_shared
;
3608 return metag_stub_long_branch
;
3611 return metag_stub_none
;
3614 #define MOVT_A0_3 0x82180005
3615 #define JUMP_A0_3 0xac180003
3617 #define MOVT_A1LBP 0x83080005
3618 #define ADD_A1LBP 0x83080000
3620 #define ADDT_A0_3_CPC 0x82980001
3621 #define ADD_A0_3_A0_3 0x82180000
3622 #define MOV_PC_A0_3 0xa3180ca0
3625 metag_build_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3627 struct elf_metag_stub_hash_entry
*hsh
;
3634 /* Massage our args to the form they really have. */
3635 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3637 stub_sec
= hsh
->stub_sec
;
3639 /* Make a note of the offset within the stubs for this entry. */
3640 hsh
->stub_offset
= stub_sec
->size
;
3641 loc
= stub_sec
->contents
+ hsh
->stub_offset
;
3643 stub_bfd
= stub_sec
->owner
;
3645 switch (hsh
->stub_type
)
3647 case metag_stub_long_branch_shared
:
3648 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3649 calculate the jump target using A0.3 as a temporary. Then a MOV
3650 to PC carries out the jump. */
3651 sym_value
= (hsh
->target_value
3652 + hsh
->target_section
->output_offset
3653 + hsh
->target_section
->output_section
->vma
3656 sym_value
-= (hsh
->stub_offset
3657 + stub_sec
->output_offset
3658 + stub_sec
->output_section
->vma
);
3660 bfd_put_32 (stub_bfd
, ADDT_A0_3_CPC
| (((sym_value
>> 16) & 0xffff) << 3),
3663 bfd_put_32 (stub_bfd
, ADD_A0_3_A0_3
| ((sym_value
& 0xffff) << 3),
3666 bfd_put_32 (stub_bfd
, MOV_PC_A0_3
, loc
+ 8);
3670 case metag_stub_long_branch
:
3671 /* A standard long branch stub is a MOVT instruction followed by a
3672 JUMP instruction using the A0.3 register as a temporary. This is
3673 the same method used by the LDLK linker (patch.c). */
3674 sym_value
= (hsh
->target_value
3675 + hsh
->target_section
->output_offset
3676 + hsh
->target_section
->output_section
->vma
3679 bfd_put_32 (stub_bfd
, MOVT_A0_3
| (((sym_value
>> 16) & 0xffff) << 3),
3682 bfd_put_32 (stub_bfd
, JUMP_A0_3
| ((sym_value
& 0xffff) << 3), loc
+ 4);
3691 stub_sec
->size
+= size
;
3695 /* As above, but don't actually build the stub. Just bump offset so
3696 we know stub section sizes. */
3699 metag_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3701 struct elf_metag_stub_hash_entry
*hsh
;
3704 /* Massage our args to the form they really have. */
3705 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3707 if (hsh
->stub_type
== metag_stub_long_branch
)
3709 else if (hsh
->stub_type
== metag_stub_long_branch_shared
)
3712 hsh
->stub_sec
->size
+= size
;
3716 /* Set up various things so that we can make a list of input sections
3717 for each output section included in the link. Returns -1 on error,
3718 0 when no stubs will be needed, and 1 on success. */
3721 elf_metag_setup_section_lists (bfd
*output_bfd
, struct bfd_link_info
*info
)
3724 unsigned int bfd_count
;
3725 unsigned int top_id
, top_index
;
3727 asection
**input_list
, **list
;
3729 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3731 /* Count the number of input BFDs and find the top input section id. */
3732 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3734 input_bfd
= input_bfd
->link
.next
)
3737 for (section
= input_bfd
->sections
;
3739 section
= section
->next
)
3741 if (top_id
< section
->id
)
3742 top_id
= section
->id
;
3746 htab
->bfd_count
= bfd_count
;
3748 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3749 htab
->stub_group
= bfd_zmalloc (amt
);
3750 if (htab
->stub_group
== NULL
)
3753 /* We can't use output_bfd->section_count here to find the top output
3754 section index as some sections may have been removed, and
3755 strip_excluded_output_sections doesn't renumber the indices. */
3756 for (section
= output_bfd
->sections
, top_index
= 0;
3758 section
= section
->next
)
3760 if (top_index
< section
->index
)
3761 top_index
= section
->index
;
3764 htab
->top_index
= top_index
;
3765 amt
= sizeof (asection
*) * (top_index
+ 1);
3766 input_list
= bfd_malloc (amt
);
3767 htab
->input_list
= input_list
;
3768 if (input_list
== NULL
)
3771 /* For sections we aren't interested in, mark their entries with a
3772 value we can check later. */
3773 list
= input_list
+ top_index
;
3775 *list
= bfd_abs_section_ptr
;
3776 while (list
-- != input_list
);
3778 for (section
= output_bfd
->sections
;
3780 section
= section
->next
)
3782 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3783 * have PC relative relocs in them but no code flag set. */
3784 if (((section
->flags
& SEC_CODE
) != 0) ||
3785 strcmp(".ctors", section
->name
) ||
3786 strcmp(".dtors", section
->name
))
3787 input_list
[section
->index
] = NULL
;
3793 /* The linker repeatedly calls this function for each input section,
3794 in the order that input sections are linked into output sections.
3795 Build lists of input sections to determine groupings between which
3796 we may insert linker stubs. */
3799 elf_metag_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3801 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3803 if (isec
->output_section
->index
<= htab
->top_index
)
3805 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3806 if (*list
!= bfd_abs_section_ptr
)
3808 /* Steal the link_sec pointer for our list. */
3809 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3810 /* This happens to make the list in reverse order,
3811 which is what we want. */
3812 PREV_SEC (isec
) = *list
;
3818 /* See whether we can group stub sections together. Grouping stub
3819 sections may result in fewer stubs. More importantly, we need to
3820 put all .init* and .fini* stubs at the beginning of the .init or
3821 .fini output sections respectively, because glibc splits the
3822 _init and _fini functions into multiple parts. Putting a stub in
3823 the middle of a function is not a good idea. */
3826 group_sections (struct elf_metag_link_hash_table
*htab
,
3827 bfd_size_type stub_group_size
,
3828 bfd_boolean stubs_always_before_branch
)
3830 asection
**list
= htab
->input_list
+ htab
->top_index
;
3833 asection
*tail
= *list
;
3834 if (tail
== bfd_abs_section_ptr
)
3836 while (tail
!= NULL
)
3840 bfd_size_type total
;
3841 bfd_boolean big_sec
;
3845 big_sec
= total
>= stub_group_size
;
3847 while ((prev
= PREV_SEC (curr
)) != NULL
3848 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3852 /* OK, the size from the start of CURR to the end is less
3853 than stub_group_size bytes and thus can be handled by one stub
3854 section. (or the tail section is itself larger than
3855 stub_group_size bytes, in which case we may be toast.)
3856 We should really be keeping track of the total size of
3857 stubs added here, as stubs contribute to the final output
3861 prev
= PREV_SEC (tail
);
3862 /* Set up this stub group. */
3863 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3865 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3867 /* But wait, there's more! Input sections up to stub_group_size
3868 bytes before the stub section can be handled by it too.
3869 Don't do this if we have a really large section after the
3870 stubs, as adding more stubs increases the chance that
3871 branches may not reach into the stub section. */
3872 if (!stubs_always_before_branch
&& !big_sec
)
3876 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3880 prev
= PREV_SEC (tail
);
3881 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3887 while (list
-- != htab
->input_list
);
3888 free (htab
->input_list
);
3892 /* Read in all local syms for all input bfds.
3893 Returns -1 on error, 0 otherwise. */
3896 get_local_syms (bfd
*output_bfd ATTRIBUTE_UNUSED
, bfd
*input_bfd
,
3897 struct bfd_link_info
*info
)
3899 unsigned int bfd_indx
;
3900 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
3901 int stub_changed
= 0;
3902 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3904 /* We want to read in symbol extension records only once. To do this
3905 we need to read in the local symbols in parallel and save them for
3906 later use; so hold pointers to the local symbols in an array. */
3907 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
3908 all_local_syms
= bfd_zmalloc (amt
);
3909 htab
->all_local_syms
= all_local_syms
;
3910 if (all_local_syms
== NULL
)
3913 /* Walk over all the input BFDs, swapping in local symbols. */
3916 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3918 Elf_Internal_Shdr
*symtab_hdr
;
3920 /* We'll need the symbol table in a second. */
3921 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3922 if (symtab_hdr
->sh_info
== 0)
3925 /* We need an array of the local symbols attached to the input bfd. */
3926 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3927 if (local_syms
== NULL
)
3929 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
3930 symtab_hdr
->sh_info
, 0,
3932 /* Cache them for elf_link_input_bfd. */
3933 symtab_hdr
->contents
= (unsigned char *) local_syms
;
3935 if (local_syms
== NULL
)
3938 all_local_syms
[bfd_indx
] = local_syms
;
3941 return stub_changed
;
3944 /* Determine and set the size of the stub section for a final link.
3946 The basic idea here is to examine all the relocations looking for
3947 PC-relative calls to a target that is unreachable with a "CALLR"
3950 /* See elf32-hppa.c and elf64-ppc.c. */
3953 elf_metag_size_stubs(bfd
*output_bfd
, bfd
*stub_bfd
,
3954 struct bfd_link_info
*info
,
3955 bfd_signed_vma group_size
,
3956 asection
* (*add_stub_section
) (const char *, asection
*),
3957 void (*layout_sections_again
) (void))
3959 bfd_size_type stub_group_size
;
3960 bfd_boolean stubs_always_before_branch
;
3961 bfd_boolean stub_changed
;
3962 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3964 /* Stash our params away. */
3965 htab
->stub_bfd
= stub_bfd
;
3966 htab
->add_stub_section
= add_stub_section
;
3967 htab
->layout_sections_again
= layout_sections_again
;
3968 stubs_always_before_branch
= group_size
< 0;
3970 stub_group_size
= -group_size
;
3972 stub_group_size
= group_size
;
3973 if (stub_group_size
== 1)
3975 /* Default values. */
3976 /* FIXME: not sure what these values should be */
3977 if (stubs_always_before_branch
)
3979 stub_group_size
= (1 << BRANCH_BITS
);
3983 stub_group_size
= (1 << BRANCH_BITS
);
3987 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3989 switch (get_local_syms (output_bfd
, info
->input_bfds
, info
))
3992 if (htab
->all_local_syms
)
3993 goto error_ret_free_local
;
3997 stub_changed
= FALSE
;
4001 stub_changed
= TRUE
;
4008 unsigned int bfd_indx
;
4011 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4013 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
4015 Elf_Internal_Shdr
*symtab_hdr
;
4017 Elf_Internal_Sym
*local_syms
;
4019 /* We'll need the symbol table in a second. */
4020 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4021 if (symtab_hdr
->sh_info
== 0)
4024 local_syms
= htab
->all_local_syms
[bfd_indx
];
4026 /* Walk over each section attached to the input bfd. */
4027 for (section
= input_bfd
->sections
;
4029 section
= section
->next
)
4031 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4033 /* If there aren't any relocs, then there's nothing more
4035 if ((section
->flags
& SEC_RELOC
) == 0
4036 || section
->reloc_count
== 0)
4039 /* If this section is a link-once section that will be
4040 discarded, then don't create any stubs. */
4041 if (section
->output_section
== NULL
4042 || section
->output_section
->owner
!= output_bfd
)
4045 /* Get the relocs. */
4047 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
, NULL
,
4049 if (internal_relocs
== NULL
)
4050 goto error_ret_free_local
;
4052 /* Now examine each relocation. */
4053 irela
= internal_relocs
;
4054 irelaend
= irela
+ section
->reloc_count
;
4055 for (; irela
< irelaend
; irela
++)
4057 unsigned int r_type
, r_indx
;
4058 enum elf_metag_stub_type stub_type
;
4059 struct elf_metag_stub_hash_entry
*hsh
;
4062 bfd_vma destination
;
4063 struct elf_metag_link_hash_entry
*hh
;
4065 const asection
*id_sec
;
4067 r_type
= ELF32_R_TYPE (irela
->r_info
);
4068 r_indx
= ELF32_R_SYM (irela
->r_info
);
4070 if (r_type
>= (unsigned int) R_METAG_MAX
)
4072 bfd_set_error (bfd_error_bad_value
);
4073 error_ret_free_internal
:
4074 if (elf_section_data (section
)->relocs
== NULL
)
4075 free (internal_relocs
);
4076 goto error_ret_free_local
;
4079 /* Only look for stubs on CALLR and B instructions. */
4080 if (!(r_type
== (unsigned int) R_METAG_RELBRANCH
||
4081 r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
))
4084 /* Now determine the call target, its name, value,
4090 if (r_indx
< symtab_hdr
->sh_info
)
4092 /* It's a local symbol. */
4093 Elf_Internal_Sym
*sym
;
4094 Elf_Internal_Shdr
*hdr
;
4097 sym
= local_syms
+ r_indx
;
4098 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4099 sym_value
= sym
->st_value
;
4100 shndx
= sym
->st_shndx
;
4101 if (shndx
< elf_numsections (input_bfd
))
4103 hdr
= elf_elfsections (input_bfd
)[shndx
];
4104 sym_sec
= hdr
->bfd_section
;
4105 destination
= (sym_value
+ irela
->r_addend
4106 + sym_sec
->output_offset
4107 + sym_sec
->output_section
->vma
);
4112 /* It's an external symbol. */
4115 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4116 hh
= ((struct elf_metag_link_hash_entry
*)
4117 elf_sym_hashes (input_bfd
)[e_indx
]);
4119 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
4120 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
4121 hh
= ((struct elf_metag_link_hash_entry
*)
4122 hh
->eh
.root
.u
.i
.link
);
4124 if (hh
->eh
.root
.type
== bfd_link_hash_defined
4125 || hh
->eh
.root
.type
== bfd_link_hash_defweak
)
4127 sym_sec
= hh
->eh
.root
.u
.def
.section
;
4128 sym_value
= hh
->eh
.root
.u
.def
.value
;
4129 if (hh
->eh
.plt
.offset
!= (bfd_vma
) -1
4130 && hh
->eh
.dynindx
!= -1
4131 && r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
)
4133 sym_sec
= htab
->splt
;
4134 sym_value
= hh
->eh
.plt
.offset
;
4137 if (sym_sec
->output_section
!= NULL
)
4138 destination
= (sym_value
+ irela
->r_addend
4139 + sym_sec
->output_offset
4140 + sym_sec
->output_section
->vma
);
4144 else if (hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
4146 if (! bfd_link_pic (info
))
4149 else if (hh
->eh
.root
.type
== bfd_link_hash_undefined
)
4151 if (! (info
->unresolved_syms_in_objects
== RM_IGNORE
4152 && (ELF_ST_VISIBILITY (hh
->eh
.other
)
4158 bfd_set_error (bfd_error_bad_value
);
4159 goto error_ret_free_internal
;
4163 /* Determine what (if any) linker stub is needed. */
4164 stub_type
= metag_type_of_stub (section
, irela
, hh
,
4166 if (stub_type
== metag_stub_none
)
4169 /* Support for grouping stub sections. */
4170 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4172 /* Get the name of this stub. */
4173 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, irela
);
4175 goto error_ret_free_internal
;
4177 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
4182 /* The proper stub has already been created. */
4187 hsh
= metag_add_stub (stub_name
, section
, htab
);
4191 goto error_ret_free_internal
;
4193 hsh
->target_value
= sym_value
;
4194 hsh
->target_section
= sym_sec
;
4195 hsh
->stub_type
= stub_type
;
4197 hsh
->addend
= irela
->r_addend
;
4198 stub_changed
= TRUE
;
4201 /* We're done with the internal relocs, free them. */
4202 if (elf_section_data (section
)->relocs
== NULL
)
4203 free (internal_relocs
);
4210 /* OK, we've added some stubs. Find out the new size of the
4212 for (stub_sec
= htab
->stub_bfd
->sections
;
4214 stub_sec
= stub_sec
->next
)
4217 bfd_hash_traverse (&htab
->bstab
, metag_size_one_stub
, htab
);
4219 /* Ask the linker to do its stuff. */
4220 (*htab
->layout_sections_again
) ();
4221 stub_changed
= FALSE
;
4224 free (htab
->all_local_syms
);
4227 error_ret_free_local
:
4228 free (htab
->all_local_syms
);
4232 /* Build all the stubs associated with the current output file. The
4233 stubs are kept in a hash table attached to the main linker hash
4234 table. This function is called via metagelf_finish in the linker. */
4237 elf_metag_build_stubs (struct bfd_link_info
*info
)
4240 struct bfd_hash_table
*table
;
4241 struct elf_metag_link_hash_table
*htab
;
4243 htab
= metag_link_hash_table (info
);
4245 for (stub_sec
= htab
->stub_bfd
->sections
;
4247 stub_sec
= stub_sec
->next
)
4251 /* Allocate memory to hold the linker stubs. */
4252 size
= stub_sec
->size
;
4253 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4254 if (stub_sec
->contents
== NULL
&& size
!= 0)
4259 /* Build the stubs as directed by the stub hash table. */
4260 table
= &htab
->bstab
;
4261 bfd_hash_traverse (table
, metag_build_one_stub
, info
);
4266 /* Return TRUE if SYM represents a local label symbol. */
4269 elf_metag_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
4271 if (name
[0] == '$' && name
[1] == 'L')
4273 return _bfd_elf_is_local_label_name (abfd
, name
);
4276 /* Return address for Ith PLT stub in section PLT, for relocation REL
4277 or (bfd_vma) -1 if it should not be included. */
4280 elf_metag_plt_sym_val (bfd_vma i
, const asection
*plt
,
4281 const arelent
*rel ATTRIBUTE_UNUSED
)
4283 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4286 #define ELF_ARCH bfd_arch_metag
4287 #define ELF_TARGET_ID METAG_ELF_DATA
4288 #define ELF_MACHINE_CODE EM_METAG
4289 #define ELF_MINPAGESIZE 0x1000
4290 #define ELF_MAXPAGESIZE 0x4000
4291 #define ELF_COMMONPAGESIZE 0x1000
4293 #define TARGET_LITTLE_SYM metag_elf32_vec
4294 #define TARGET_LITTLE_NAME "elf32-metag"
4296 #define elf_symbol_leading_char '_'
4298 #define elf_info_to_howto_rel NULL
4299 #define elf_info_to_howto metag_info_to_howto_rela
4301 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4302 #define bfd_elf32_bfd_link_hash_table_create \
4303 elf_metag_link_hash_table_create
4304 #define elf_backend_relocate_section elf_metag_relocate_section
4305 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4306 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4307 #define elf_backend_check_relocs elf_metag_check_relocs
4308 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4309 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4310 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4311 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4312 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4313 #define elf_backend_omit_section_dynsym \
4314 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4315 #define elf_backend_post_process_headers elf_metag_post_process_headers
4316 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4317 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4318 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4320 #define elf_backend_can_gc_sections 1
4321 #define elf_backend_can_refcount 1
4322 #define elf_backend_got_header_size 12
4323 #define elf_backend_rela_normal 1
4324 #define elf_backend_want_got_sym 0
4325 #define elf_backend_want_plt_sym 0
4326 #define elf_backend_plt_readonly 1
4328 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4329 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4331 #include "elf32-target.h"