1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2017 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 /* Small local sym cache. */
846 struct sym_cache sym_cache
;
848 /* Data for LDM relocations. */
851 bfd_signed_vma refcount
;
856 /* Return the base vma address which should be subtracted from the
857 real address when resolving a dtpoff relocation. This is PT_TLS
860 dtpoff_base (struct bfd_link_info
*info
)
862 /* If tls_sec is NULL, we should have signalled an error already. */
863 if (elf_hash_table (info
)->tls_sec
== NULL
)
865 return elf_hash_table (info
)->tls_sec
->vma
;
868 /* Return the relocation value for R_METAG_TLS_IE */
870 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
872 /* If tls_sec is NULL, we should have signalled an error already. */
873 if (elf_hash_table (info
)->tls_sec
== NULL
)
875 /* METAG TLS ABI is variant I and static TLS blocks start just after
876 tcbhead structure which has 2 pointer fields. */
877 return (address
- elf_hash_table (info
)->tls_sec
->vma
878 + align_power ((bfd_vma
) 8,
879 elf_hash_table (info
)->tls_sec
->alignment_power
));
883 metag_info_to_howto_rela (bfd
*abfd ATTRIBUTE_UNUSED
,
885 Elf_Internal_Rela
*dst
)
889 r_type
= ELF32_R_TYPE (dst
->r_info
);
890 if (r_type
>= (unsigned int) R_METAG_MAX
)
892 /* xgettext:c-format */
893 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd
, r_type
);
896 cache_ptr
->howto
= & elf_metag_howto_table
[r_type
];
899 static reloc_howto_type
*
900 metag_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
901 bfd_reloc_code_real_type code
)
905 for (i
= 0; i
< sizeof (metag_reloc_map
) / sizeof (metag_reloc_map
[0]); i
++)
906 if (metag_reloc_map
[i
].bfd_reloc_val
== code
)
907 return & elf_metag_howto_table
[metag_reloc_map
[i
].metag_reloc_val
];
912 static reloc_howto_type
*
913 metag_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
918 for (i
= 0; i
< sizeof (elf_metag_howto_table
) / sizeof (elf_metag_howto_table
[0]); i
++)
919 if (elf_metag_howto_table
[i
].name
!= NULL
920 && strcasecmp (elf_metag_howto_table
[i
].name
, r_name
) == 0)
921 return &elf_metag_howto_table
[i
];
926 /* Various hash macros and functions. */
927 #define metag_link_hash_table(p) \
928 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
929 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
931 #define metag_elf_hash_entry(ent) \
932 ((struct elf_metag_link_hash_entry *)(ent))
934 #define metag_stub_hash_entry(ent) \
935 ((struct elf_metag_stub_hash_entry *)(ent))
937 #define metag_stub_hash_lookup(table, string, create, copy) \
938 ((struct elf_metag_stub_hash_entry *) \
939 bfd_hash_lookup ((table), (string), (create), (copy)))
941 #define metag_elf_local_got_tls_type(abfd) \
942 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
944 /* Assorted hash table functions. */
946 /* Initialize an entry in the stub hash table. */
948 static struct bfd_hash_entry
*
949 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
950 struct bfd_hash_table
*table
,
953 /* Allocate the structure if it has not already been allocated by a
957 entry
= bfd_hash_allocate (table
,
958 sizeof (struct elf_metag_stub_hash_entry
));
963 /* Call the allocation method of the superclass. */
964 entry
= bfd_hash_newfunc (entry
, table
, string
);
967 struct elf_metag_stub_hash_entry
*hsh
;
969 /* Initialize the local fields. */
970 hsh
= (struct elf_metag_stub_hash_entry
*) entry
;
971 hsh
->stub_sec
= NULL
;
972 hsh
->stub_offset
= 0;
973 hsh
->target_value
= 0;
974 hsh
->target_section
= NULL
;
975 hsh
->stub_type
= metag_stub_long_branch
;
983 /* Initialize an entry in the link hash table. */
985 static struct bfd_hash_entry
*
986 metag_link_hash_newfunc (struct bfd_hash_entry
*entry
,
987 struct bfd_hash_table
*table
,
990 /* Allocate the structure if it has not already been allocated by a
994 entry
= bfd_hash_allocate (table
,
995 sizeof (struct elf_metag_link_hash_entry
));
1000 /* Call the allocation method of the superclass. */
1001 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1004 struct elf_metag_link_hash_entry
*hh
;
1006 /* Initialize the local fields. */
1007 hh
= (struct elf_metag_link_hash_entry
*) entry
;
1008 hh
->hsh_cache
= NULL
;
1009 hh
->dyn_relocs
= NULL
;
1010 hh
->tls_type
= GOT_UNKNOWN
;
1016 /* Free the derived linker hash table. */
1019 elf_metag_link_hash_table_free (bfd
*obfd
)
1021 struct elf_metag_link_hash_table
*htab
1022 = (struct elf_metag_link_hash_table
*) obfd
->link
.hash
;
1024 bfd_hash_table_free (&htab
->bstab
);
1025 _bfd_elf_link_hash_table_free (obfd
);
1028 /* Create the derived linker hash table. The Meta ELF port uses the derived
1029 hash table to keep information specific to the Meta ELF linker (without
1030 using static variables). */
1032 static struct bfd_link_hash_table
*
1033 elf_metag_link_hash_table_create (bfd
*abfd
)
1035 struct elf_metag_link_hash_table
*htab
;
1036 bfd_size_type amt
= sizeof (*htab
);
1038 htab
= bfd_zmalloc (amt
);
1042 if (!_bfd_elf_link_hash_table_init (&htab
->etab
, abfd
,
1043 metag_link_hash_newfunc
,
1044 sizeof (struct elf_metag_link_hash_entry
),
1051 /* Init the stub hash table too. */
1052 if (!bfd_hash_table_init (&htab
->bstab
, stub_hash_newfunc
,
1053 sizeof (struct elf_metag_stub_hash_entry
)))
1055 _bfd_elf_link_hash_table_free (abfd
);
1058 htab
->etab
.root
.hash_table_free
= elf_metag_link_hash_table_free
;
1060 return &htab
->etab
.root
;
1063 /* Section name for stubs is the associated section name plus this
1065 #define STUB_SUFFIX ".stub"
1067 /* Build a name for an entry in the stub hash table. */
1070 metag_stub_name (const asection
*input_section
,
1071 const asection
*sym_sec
,
1072 const struct elf_metag_link_hash_entry
*hh
,
1073 const Elf_Internal_Rela
*rel
)
1080 len
= 8 + 1 + strlen (hh
->eh
.root
.root
.string
) + 1 + 8 + 1;
1081 stub_name
= bfd_malloc (len
);
1082 if (stub_name
!= NULL
)
1084 sprintf (stub_name
, "%08x_%s+%x",
1085 input_section
->id
& 0xffffffff,
1086 hh
->eh
.root
.root
.string
,
1087 (int) rel
->r_addend
& 0xffffffff);
1092 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1093 stub_name
= bfd_malloc (len
);
1094 if (stub_name
!= NULL
)
1096 sprintf (stub_name
, "%08x_%x:%x+%x",
1097 input_section
->id
& 0xffffffff,
1098 sym_sec
->id
& 0xffffffff,
1099 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
1100 (int) rel
->r_addend
& 0xffffffff);
1106 /* Look up an entry in the stub hash. Stub entries are cached because
1107 creating the stub name takes a bit of time. */
1109 static struct elf_metag_stub_hash_entry
*
1110 metag_get_stub_entry (const asection
*input_section
,
1111 const asection
*sym_sec
,
1112 struct elf_metag_link_hash_entry
*hh
,
1113 const Elf_Internal_Rela
*rel
,
1114 struct elf_metag_link_hash_table
*htab
)
1116 struct elf_metag_stub_hash_entry
*hsh
;
1117 const asection
*id_sec
;
1119 /* If this input section is part of a group of sections sharing one
1120 stub section, then use the id of the first section in the group.
1121 Stub names need to include a section id, as there may well be
1122 more than one stub used to reach say, printf, and we need to
1123 distinguish between them. */
1124 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
1126 if (hh
!= NULL
&& hh
->hsh_cache
!= NULL
1127 && hh
->hsh_cache
->hh
== hh
1128 && hh
->hsh_cache
->id_sec
== id_sec
)
1130 hsh
= hh
->hsh_cache
;
1136 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, rel
);
1137 if (stub_name
== NULL
)
1140 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
1141 stub_name
, FALSE
, FALSE
);
1144 hh
->hsh_cache
= hsh
;
1152 /* Add a new stub entry to the stub hash. Not all fields of the new
1153 stub entry are initialised. */
1155 static struct elf_metag_stub_hash_entry
*
1156 metag_add_stub (const char *stub_name
,
1158 struct elf_metag_link_hash_table
*htab
)
1162 struct elf_metag_stub_hash_entry
*hsh
;
1164 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
1165 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
1166 if (stub_sec
== NULL
)
1168 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
1169 if (stub_sec
== NULL
)
1175 namelen
= strlen (link_sec
->name
);
1176 len
= namelen
+ sizeof (STUB_SUFFIX
);
1177 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
1181 memcpy (s_name
, link_sec
->name
, namelen
);
1182 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
1184 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
1185 if (stub_sec
== NULL
)
1187 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
1189 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
1192 /* Enter this entry into the linker stub hash table. */
1193 hsh
= metag_stub_hash_lookup (&htab
->bstab
, stub_name
,
1197 /* xgettext:c-format */
1198 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1199 section
->owner
, stub_name
);
1203 hsh
->stub_sec
= stub_sec
;
1204 hsh
->stub_offset
= 0;
1205 hsh
->id_sec
= link_sec
;
1209 /* Check a signed integer value can be represented in the given number
1213 within_signed_range (int value
, unsigned int bits
)
1215 int min_val
= -(1 << (bits
- 1));
1216 int max_val
= (1 << (bits
- 1)) - 1;
1217 return (value
<= max_val
) && (value
>= min_val
);
1220 /* Perform a relocation as part of a final link. */
1222 static bfd_reloc_status_type
1223 metag_final_link_relocate (reloc_howto_type
*howto
,
1225 asection
*input_section
,
1227 Elf_Internal_Rela
*rel
,
1229 struct elf_metag_link_hash_entry
*hh
,
1230 struct elf_metag_link_hash_table
*htab
,
1233 bfd_reloc_status_type r
= bfd_reloc_ok
;
1234 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
1235 int opcode
, op_shift
, op_extended
, l1
, l2
;
1236 bfd_signed_vma srel
, addend
= rel
->r_addend
;
1237 struct elf_metag_stub_hash_entry
*hsh
= NULL
;
1240 /* Find out where we are and where we're going. */
1241 location
= (rel
->r_offset
+
1242 input_section
->output_offset
+
1243 input_section
->output_section
->vma
);
1245 switch (howto
->type
)
1247 case R_METAG_RELBRANCH
:
1248 case R_METAG_RELBRANCH_PLT
:
1249 /* Make it a pc relative offset. */
1250 relocation
-= location
;
1252 case R_METAG_TLS_GD
:
1253 case R_METAG_TLS_IE
:
1254 relocation
-= elf_gp (input_section
->output_section
->owner
);
1260 switch (howto
->type
)
1262 case R_METAG_RELBRANCH_PLT
:
1263 case R_METAG_RELBRANCH
:
1264 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1266 srel
= (bfd_signed_vma
) relocation
;
1269 /* If the branch is out of reach, then redirect the
1270 call to the local stub for this function. */
1271 if (srel
> ((1 << (BRANCH_BITS
+ 1)) - 1) ||
1272 (srel
< - (1 << (BRANCH_BITS
+ 1))))
1274 if (sym_sec
== NULL
)
1277 hsh
= metag_get_stub_entry (input_section
, sym_sec
,
1280 return bfd_reloc_undefined
;
1282 /* Munge up the value and addend so that we call the stub
1283 rather than the procedure directly. */
1284 srel
= (hsh
->stub_offset
1285 + hsh
->stub_sec
->output_offset
1286 + hsh
->stub_sec
->output_section
->vma
);
1292 if (!within_signed_range (srel
, BRANCH_BITS
))
1294 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1297 return bfd_reloc_overflow
;
1300 opcode
&= ~(0x7ffff << 5);
1301 opcode
|= ((srel
& 0x7ffff) << 5);
1303 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1305 case R_METAG_GETSETOFF
:
1306 case R_METAG_GETSET_GOT
:
1307 case R_METAG_GETSET_GOTOFF
:
1308 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1310 srel
= (bfd_signed_vma
) relocation
;
1313 /* Is this a standard or extended GET/SET? */
1314 if ((opcode
& 0xf0000000) == 0xa0000000)
1316 /* Extended GET/SET. */
1323 /* Standard GET/SET. */
1324 l1
= opcode
& 0x01000000;
1325 l2
= opcode
& 0x04000000;
1329 /* Calculate the width of the GET/SET and how much we need to
1330 shift the result by. */
1342 /* GET/SET offsets are scaled by the width of the transfer. */
1343 srel
= srel
>> op_shift
;
1345 /* Extended GET/SET has signed 12 bits of offset, standard has
1349 if (!within_signed_range (srel
, 12))
1351 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1354 return bfd_reloc_overflow
;
1356 opcode
&= ~(0xfff << 7);
1357 opcode
|= ((srel
& 0xfff) << 7);
1361 if (!within_signed_range (srel
, 5))
1363 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1366 return bfd_reloc_overflow
;
1368 opcode
&= ~(0x3f << 8);
1369 opcode
|= ((srel
& 0x3f) << 8);
1372 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1374 case R_METAG_TLS_GD
:
1375 case R_METAG_TLS_LDM
:
1376 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1378 if ((bfd_signed_vma
)relocation
< 0)
1380 /* sign extend immediate */
1381 if ((opcode
& 0xf2000001) == 0x02000000)
1383 /* ADD De.e,Dx.r,#I16 */
1387 return bfd_reloc_overflow
;
1390 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1392 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1393 contents
, rel
->r_offset
,
1394 relocation
, rel
->r_addend
);
1397 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1398 contents
, rel
->r_offset
,
1399 relocation
, rel
->r_addend
);
1405 /* This is defined because R_METAG_NONE != 0...
1406 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1407 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1408 rel, relend, howto, contents) \
1410 _bfd_clear_contents (howto, input_bfd, input_section, \
1411 contents + rel->r_offset); \
1413 if (bfd_link_relocatable (info) \
1414 && (input_section->flags & SEC_DEBUGGING)) \
1416 /* Only remove relocations in debug sections since other \
1417 sections may require relocations. */ \
1418 Elf_Internal_Shdr *rel_hdr; \
1420 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1422 /* Avoid empty output section. */ \
1423 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1425 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1426 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1427 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1429 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1431 input_section->reloc_count--; \
1438 rel->r_info = R_METAG_NONE; \
1439 rel->r_addend = 0; \
1443 /* Relocate a META ELF section.
1445 The RELOCATE_SECTION function is called by the new ELF backend linker
1446 to handle the relocations for a section.
1448 The relocs are always passed as Rela structures; if the section
1449 actually uses Rel structures, the r_addend field will always be
1452 This function is responsible for adjusting the section contents as
1453 necessary, and (if using Rela relocs and generating a relocatable
1454 output file) adjusting the reloc addend as necessary.
1456 This function does not have to worry about setting the reloc
1457 address or the reloc symbol index.
1459 LOCAL_SYMS is a pointer to the swapped in local symbols.
1461 LOCAL_SECTIONS is an array giving the section in the input file
1462 corresponding to the st_shndx field of each local symbol.
1464 The global hash table entry for the global symbols can be found
1465 via elf_sym_hashes (input_bfd).
1467 When generating relocatable output, this function must handle
1468 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1469 going to be the section symbol corresponding to the output
1470 section, which means that the addend must be adjusted
1474 elf_metag_relocate_section (bfd
*output_bfd
,
1475 struct bfd_link_info
*info
,
1477 asection
*input_section
,
1479 Elf_Internal_Rela
*relocs
,
1480 Elf_Internal_Sym
*local_syms
,
1481 asection
**local_sections
)
1483 bfd_vma
*local_got_offsets
;
1484 Elf_Internal_Shdr
*symtab_hdr
;
1485 struct elf_link_hash_entry
**eh_syms
;
1486 struct elf_metag_link_hash_table
*htab
;
1487 Elf_Internal_Rela
*rel
;
1488 Elf_Internal_Rela
*relend
;
1491 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1492 eh_syms
= elf_sym_hashes (input_bfd
);
1493 relend
= relocs
+ input_section
->reloc_count
;
1495 htab
= metag_link_hash_table (info
);
1496 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1500 for (rel
= relocs
; rel
< relend
; rel
++)
1502 reloc_howto_type
*howto
;
1503 unsigned long r_symndx
;
1504 Elf_Internal_Sym
*sym
;
1506 struct elf_metag_link_hash_entry
*hh
;
1508 bfd_reloc_status_type r
;
1512 r_type
= ELF32_R_TYPE (rel
->r_info
);
1514 if (r_type
== R_METAG_GNU_VTINHERIT
1515 || r_type
== R_METAG_GNU_VTENTRY
1516 || r_type
== R_METAG_NONE
)
1519 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1521 howto
= elf_metag_howto_table
+ ELF32_R_TYPE (rel
->r_info
);
1526 if (r_symndx
< symtab_hdr
->sh_info
)
1528 sym
= local_syms
+ r_symndx
;
1529 sec
= local_sections
[r_symndx
];
1530 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1532 name
= bfd_elf_string_from_elf_section
1533 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
1534 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
1538 struct elf_link_hash_entry
*eh
;
1539 bfd_boolean unresolved_reloc
, warned
, ignored
;
1541 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1542 r_symndx
, symtab_hdr
, eh_syms
,
1543 eh
, sec
, relocation
,
1544 unresolved_reloc
, warned
, ignored
);
1546 name
= eh
->root
.root
.string
;
1547 hh
= (struct elf_metag_link_hash_entry
*) eh
;
1550 if (sec
!= NULL
&& discarded_section (sec
))
1551 METAG_RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1552 rel
, relend
, howto
, contents
);
1554 if (bfd_link_relocatable (info
))
1559 case R_METAG_ADDR32
:
1560 case R_METAG_RELBRANCH
:
1561 if ((input_section
->flags
& SEC_ALLOC
) == 0)
1564 if ((bfd_link_pic (info
)
1565 && r_symndx
!= STN_UNDEF
1566 && (input_section
->flags
& SEC_ALLOC
) != 0
1567 && (r_type
!= R_METAG_RELBRANCH
1568 || !SYMBOL_CALLS_LOCAL (info
, &hh
->eh
)))
1569 || (!bfd_link_pic (info
)
1571 && hh
->eh
.dynindx
!= -1
1572 && !hh
->eh
.non_got_ref
1573 && ((hh
->eh
.def_dynamic
1574 && !hh
->eh
.def_regular
)
1575 || hh
->eh
.root
.type
== bfd_link_hash_undefweak
1576 || hh
->eh
.root
.type
== bfd_link_hash_undefined
)))
1578 Elf_Internal_Rela outrel
;
1579 bfd_boolean skip
, relocate
;
1582 /* When generating a shared object, these relocations
1583 are copied into the output file to be resolved at run
1586 sreloc
= elf_section_data (input_section
)->sreloc
;
1587 BFD_ASSERT (sreloc
!= NULL
);
1592 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
1596 if (outrel
.r_offset
== (bfd_vma
) -1)
1598 else if (outrel
.r_offset
== (bfd_vma
) -2)
1599 skip
= TRUE
, relocate
= TRUE
;
1600 outrel
.r_offset
+= (input_section
->output_section
->vma
1601 + input_section
->output_offset
);
1605 memset (&outrel
, 0, sizeof outrel
);
1606 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_NONE
);
1608 else if (r_type
== R_METAG_RELBRANCH
)
1610 BFD_ASSERT (hh
!= NULL
&& hh
->eh
.dynindx
!= -1);
1611 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1612 outrel
.r_addend
= rel
->r_addend
;
1616 /* h->dynindx may be -1 if this symbol was marked to
1619 || ((info
->symbolic
|| hh
->eh
.dynindx
== -1)
1620 && hh
->eh
.def_regular
))
1623 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1624 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1628 BFD_ASSERT (hh
->eh
.dynindx
!= -1);
1629 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1630 outrel
.r_addend
= rel
->r_addend
;
1634 loc
= sreloc
->contents
;
1635 loc
+= sreloc
->reloc_count
* sizeof(Elf32_External_Rela
);
1636 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,loc
);
1637 ++sreloc
->reloc_count
;
1639 /* If this reloc is against an external symbol, we do
1640 not want to fiddle with the addend. Otherwise, we
1641 need to include the symbol value so that it becomes
1642 an addend for the dynamic reloc. */
1648 case R_METAG_RELBRANCH_PLT
:
1649 /* Relocation is to the entry for this symbol in the
1650 procedure linkage table. */
1655 if (hh
->eh
.forced_local
)
1658 if (hh
->eh
.plt
.offset
== (bfd_vma
) -1 || htab
->etab
.splt
== NULL
)
1660 /* We didn't make a PLT entry for this symbol. This
1661 happens when statically linking PIC code, or when
1662 using -Bsymbolic. */
1666 relocation
= (htab
->etab
.splt
->output_section
->vma
1667 + htab
->etab
.splt
->output_offset
1668 + hh
->eh
.plt
.offset
);
1670 case R_METAG_HI16_GOTPC
:
1671 case R_METAG_LO16_GOTPC
:
1672 BFD_ASSERT (htab
->etab
.sgot
!= NULL
);
1674 relocation
= (htab
->etab
.sgot
->output_section
->vma
+
1675 htab
->etab
.sgot
->output_offset
);
1676 relocation
+= GOT_REG_OFFSET
;
1677 relocation
-= (input_section
->output_section
->vma
1678 + input_section
->output_offset
1681 case R_METAG_HI16_GOTOFF
:
1682 case R_METAG_LO16_GOTOFF
:
1683 case R_METAG_GETSET_GOTOFF
:
1684 BFD_ASSERT (htab
->etab
.sgot
!= NULL
);
1686 relocation
-= (htab
->etab
.sgot
->output_section
->vma
+
1687 htab
->etab
.sgot
->output_offset
);
1688 relocation
-= GOT_REG_OFFSET
;
1690 case R_METAG_GETSET_GOT
:
1693 bfd_boolean do_got
= 0;
1695 /* Relocation is to the entry for this symbol in the
1696 global offset table. */
1701 off
= hh
->eh
.got
.offset
;
1702 dyn
= htab
->etab
.dynamic_sections_created
;
1703 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1704 bfd_link_pic (info
),
1707 /* If we aren't going to call finish_dynamic_symbol,
1708 then we need to handle initialisation of the .got
1709 entry and create needed relocs here. Since the
1710 offset must always be a multiple of 4, we use the
1711 least significant bit to record whether we have
1712 initialised it already. */
1717 hh
->eh
.got
.offset
|= 1;
1724 /* Local symbol case. */
1725 if (local_got_offsets
== NULL
)
1728 off
= local_got_offsets
[r_symndx
];
1730 /* The offset must always be a multiple of 4. We use
1731 the least significant bit to record whether we have
1732 already generated the necessary reloc. */
1737 local_got_offsets
[r_symndx
] |= 1;
1744 if (bfd_link_pic (info
))
1746 /* Output a dynamic relocation for this GOT entry.
1747 In this case it is relative to the base of the
1748 object because the symbol index is zero. */
1749 Elf_Internal_Rela outrel
;
1751 asection
*s
= htab
->etab
.srelgot
;
1753 outrel
.r_offset
= (off
1754 + htab
->etab
.sgot
->output_offset
1755 + htab
->etab
.sgot
->output_section
->vma
);
1756 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1757 outrel
.r_addend
= relocation
;
1759 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1760 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1763 bfd_put_32 (output_bfd
, relocation
,
1764 htab
->etab
.sgot
->contents
+ off
);
1767 if (off
>= (bfd_vma
) -2)
1770 relocation
= off
- GOT_REG_OFFSET
;
1773 case R_METAG_TLS_GD
:
1774 case R_METAG_TLS_IE
:
1776 /* XXXMJF There is room here for optimisations. For example
1777 converting from GD->IE, etc. */
1782 if (htab
->etab
.sgot
== NULL
)
1789 dyn
= htab
->etab
.dynamic_sections_created
;
1791 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1792 bfd_link_pic (info
),
1794 && (!bfd_link_pic (info
)
1795 || !SYMBOL_REFERENCES_LOCAL (info
, &hh
->eh
)))
1797 indx
= hh
->eh
.dynindx
;
1799 off
= hh
->eh
.got
.offset
;
1800 tls_type
= hh
->tls_type
;
1804 /* Local symbol case. */
1805 if (local_got_offsets
== NULL
)
1808 off
= local_got_offsets
[r_symndx
];
1809 tls_type
= metag_elf_local_got_tls_type (input_bfd
) [r_symndx
];
1812 if (tls_type
== GOT_UNKNOWN
)
1819 bfd_boolean need_relocs
= FALSE
;
1820 Elf_Internal_Rela outrel
;
1821 bfd_byte
*loc
= NULL
;
1824 /* The GOT entries have not been initialized yet. Do it
1825 now, and emit any relocations. If both an IE GOT and a
1826 GD GOT are necessary, we emit the GD first. */
1828 if ((bfd_link_pic (info
) || indx
!= 0)
1830 || ELF_ST_VISIBILITY (hh
->eh
.other
) == STV_DEFAULT
1831 || hh
->eh
.root
.type
!= bfd_link_hash_undefweak
))
1834 loc
= htab
->etab
.srelgot
->contents
;
1835 /* FIXME (CAO): Should this be reloc_count++ ? */
1836 loc
+= htab
->etab
.srelgot
->reloc_count
* sizeof (Elf32_External_Rela
);
1839 if (tls_type
& GOT_TLS_GD
)
1843 outrel
.r_offset
= (cur_off
1844 + htab
->etab
.sgot
->output_section
->vma
1845 + htab
->etab
.sgot
->output_offset
);
1846 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_DTPMOD
);
1847 outrel
.r_addend
= 0;
1848 bfd_put_32 (output_bfd
, 0, htab
->etab
.sgot
->contents
+ cur_off
);
1850 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1851 htab
->etab
.srelgot
->reloc_count
++;
1852 loc
+= sizeof (Elf32_External_Rela
);
1855 bfd_put_32 (output_bfd
, 0,
1856 htab
->etab
.sgot
->contents
+ cur_off
+ 4);
1859 bfd_put_32 (output_bfd
, 0,
1860 htab
->etab
.sgot
->contents
+ cur_off
+ 4);
1861 outrel
.r_info
= ELF32_R_INFO (indx
,
1862 R_METAG_TLS_DTPOFF
);
1863 outrel
.r_offset
+= 4;
1864 bfd_elf32_swap_reloca_out (output_bfd
,
1866 htab
->etab
.srelgot
->reloc_count
++;
1867 loc
+= sizeof (Elf32_External_Rela
);
1872 /* We don't support changing the TLS model. */
1874 if (bfd_link_pic (info
))
1875 _bfd_error_handler (_("%B(%A): multiple TLS models are not supported"),
1876 input_bfd
, input_section
, name
);
1878 _bfd_error_handler (_("%B(%A): shared library symbol %s encountered whilst performing a static link"),
1879 input_bfd
, input_section
, name
);
1886 if (tls_type
& GOT_TLS_IE
)
1890 outrel
.r_offset
= (cur_off
1891 + htab
->etab
.sgot
->output_section
->vma
1892 + htab
->etab
.sgot
->output_offset
);
1893 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_TPOFF
);
1896 outrel
.r_addend
= relocation
- dtpoff_base (info
);
1898 outrel
.r_addend
= 0;
1900 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1901 htab
->etab
.srelgot
->reloc_count
++;
1902 loc
+= sizeof (Elf32_External_Rela
);
1905 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
1906 htab
->etab
.sgot
->contents
+ cur_off
);
1912 hh
->eh
.got
.offset
|= 1;
1914 local_got_offsets
[r_symndx
] |= 1;
1917 /* Add the base of the GOT to the relocation value. */
1918 relocation
= off
- GOT_REG_OFFSET
;
1923 case R_METAG_TLS_IENONPIC_HI16
:
1924 case R_METAG_TLS_IENONPIC_LO16
:
1925 case R_METAG_TLS_LE_HI16
:
1926 case R_METAG_TLS_LE_LO16
:
1927 if (bfd_link_pic (info
))
1930 /* xgettext:c-format */
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
->etab
.sgot
== NULL
)
1952 off
= htab
->tls_ldm_got
.offset
;
1957 Elf_Internal_Rela outrel
;
1960 outrel
.r_offset
= (off
1961 + htab
->etab
.sgot
->output_section
->vma
1962 + htab
->etab
.sgot
->output_offset
);
1964 outrel
.r_addend
= 0;
1965 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_TLS_DTPMOD
);
1966 loc
= htab
->etab
.srelgot
->contents
;
1967 loc
+= htab
->etab
.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
->etab
.splt
!= NULL
)
2042 /* Call the generic code to do most of the work. */
2043 if (! _bfd_elf_create_dynamic_sections (abfd
, info
))
2046 /* The header goes at the start of the dynamic .got section, which
2047 is placed after the dynamic .got.plt section. ie. The header is
2048 not necessarily at the start of the output .got section. */
2049 htab
->etab
.sgot
->size
+= 12;
2051 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
2053 if (!(_bfd_generic_link_add_one_symbol
2054 (info
, abfd
, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL
, htab
->etab
.sgot
,
2055 (bfd_vma
) 0, NULL
, FALSE
, bed
->collect
, &bh
)))
2057 eh
= (struct elf_link_hash_entry
*) bh
;
2058 eh
->def_regular
= 1;
2059 eh
->type
= STT_OBJECT
;
2060 eh
->other
= STV_HIDDEN
;
2062 if (! bfd_link_executable (info
)
2063 && ! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2066 htab
->etab
.hgot
= eh
;
2071 /* Look through the relocs for a section during the first phase, and
2072 calculate needed space in the global offset table, procedure linkage
2073 table, and dynamic reloc sections. At this point we haven't
2074 necessarily read all the input files. */
2077 elf_metag_check_relocs (bfd
*abfd
,
2078 struct bfd_link_info
*info
,
2080 const Elf_Internal_Rela
*relocs
)
2082 Elf_Internal_Shdr
*symtab_hdr
;
2083 struct elf_link_hash_entry
**eh_syms
;
2084 const Elf_Internal_Rela
*rel
;
2085 const Elf_Internal_Rela
*rel_end
;
2086 struct elf_metag_link_hash_table
*htab
;
2089 int tls_type
= GOT_UNKNOWN
, old_tls_type
= GOT_UNKNOWN
;
2091 if (bfd_link_relocatable (info
))
2094 htab
= metag_link_hash_table (info
);
2095 dynobj
= htab
->etab
.dynobj
;
2096 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2097 eh_syms
= elf_sym_hashes (abfd
);
2103 rel_end
= relocs
+ sec
->reloc_count
;
2104 for (rel
= relocs
; rel
< rel_end
; rel
++)
2107 struct elf_metag_link_hash_entry
*hh
;
2108 Elf_Internal_Sym
*isym
;
2109 unsigned long r_symndx
;
2111 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2112 r_type
= ELF32_R_TYPE (rel
->r_info
);
2113 if (r_symndx
< symtab_hdr
->sh_info
)
2115 /* A local symbol. */
2116 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2127 hh
= (struct elf_metag_link_hash_entry
*)
2128 eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
2129 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
2130 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
2131 hh
= (struct elf_metag_link_hash_entry
*) hh
->eh
.root
.u
.i
.link
;
2133 /* PR15323, ref flags aren't set for references in the same
2135 hh
->eh
.root
.non_ir_ref
= 1;
2138 /* Some relocs require a global offset table. */
2139 if (htab
->etab
.sgot
== NULL
)
2143 case R_METAG_TLS_GD
:
2144 case R_METAG_TLS_LDM
:
2145 case R_METAG_TLS_IE
:
2146 if (bfd_link_pic (info
))
2147 info
->flags
|= DF_STATIC_TLS
;
2150 case R_METAG_HI16_GOTOFF
:
2151 case R_METAG_LO16_GOTOFF
:
2152 case R_METAG_GETSET_GOTOFF
:
2153 case R_METAG_GETSET_GOT
:
2154 case R_METAG_HI16_GOTPC
:
2155 case R_METAG_LO16_GOTPC
:
2157 htab
->etab
.dynobj
= dynobj
= abfd
;
2158 if (!elf_metag_create_dynamic_sections (dynobj
, info
))
2169 case R_METAG_TLS_IE
:
2170 case R_METAG_TLS_GD
:
2171 case R_METAG_GETSET_GOT
:
2175 tls_type
= GOT_NORMAL
;
2177 case R_METAG_TLS_IE
:
2178 tls_type
= GOT_TLS_IE
;
2180 case R_METAG_TLS_GD
:
2181 tls_type
= GOT_TLS_GD
;
2187 hh
->eh
.got
.refcount
+= 1;
2188 old_tls_type
= hh
->tls_type
;
2192 bfd_signed_vma
*local_got_refcounts
;
2194 /* This is a global offset table entry for a local
2196 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2197 if (local_got_refcounts
== NULL
)
2201 size
= symtab_hdr
->sh_info
;
2202 size
*= sizeof (bfd_signed_vma
);
2203 /* Add in space to store the local GOT TLS types. */
2204 size
+= symtab_hdr
->sh_info
;
2205 local_got_refcounts
= ((bfd_signed_vma
*)
2206 bfd_zalloc (abfd
, size
));
2207 if (local_got_refcounts
== NULL
)
2209 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2210 memset (metag_elf_local_got_tls_type (abfd
),
2211 GOT_UNKNOWN
, symtab_hdr
->sh_info
);
2213 local_got_refcounts
[r_symndx
] += 1;
2214 old_tls_type
= metag_elf_local_got_tls_type (abfd
) [r_symndx
];
2217 if (old_tls_type
!= tls_type
)
2221 hh
->tls_type
= tls_type
;
2225 metag_elf_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2231 case R_METAG_TLS_LDM
:
2232 metag_link_hash_table (info
)->tls_ldm_got
.refcount
+= 1;
2235 case R_METAG_RELBRANCH_PLT
:
2236 /* This symbol requires a procedure linkage table entry. We
2237 actually build the entry in adjust_dynamic_symbol,
2238 because this might be a case of linking PIC code without
2239 linking in any dynamic objects, in which case we don't
2240 need to generate a procedure linkage table after all. */
2242 /* If this is a local symbol, we resolve it directly without
2243 creating a procedure linkage table entry. */
2247 if (hh
->eh
.forced_local
)
2250 hh
->eh
.needs_plt
= 1;
2251 hh
->eh
.plt
.refcount
+= 1;
2254 case R_METAG_HIADDR16
:
2255 case R_METAG_LOADDR16
:
2256 /* Let's help debug shared library creation. These relocs
2257 cannot be used in shared libs. Don't error out for
2258 sections we don't care about, such as debug sections or
2259 non-constant sections. */
2260 if (bfd_link_pic (info
)
2261 && (sec
->flags
& SEC_ALLOC
) != 0
2262 && (sec
->flags
& SEC_READONLY
) != 0)
2267 name
= hh
->eh
.root
.root
.string
;
2269 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
2271 /* xgettext:c-format */
2272 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2273 abfd
, elf_metag_howto_table
[r_type
].name
, name
);
2274 bfd_set_error (bfd_error_bad_value
);
2279 case R_METAG_ADDR32
:
2280 case R_METAG_RELBRANCH
:
2281 case R_METAG_GETSETOFF
:
2282 if (hh
!= NULL
&& !bfd_link_pic (info
))
2284 hh
->eh
.non_got_ref
= 1;
2285 hh
->eh
.plt
.refcount
+= 1;
2288 /* If we are creating a shared library, and this is a reloc
2289 against a global symbol, or a non PC relative reloc
2290 against a local symbol, then we need to copy the reloc
2291 into the shared library. However, if we are linking with
2292 -Bsymbolic, we do not need to copy a reloc against a
2293 global symbol which is defined in an object we are
2294 including in the link (i.e., DEF_REGULAR is set). At
2295 this point we have not seen all the input files, so it is
2296 possible that DEF_REGULAR is not set now but will be set
2297 later (it is never cleared). We account for that
2298 possibility below by storing information in the
2299 dyn_relocs field of the hash table entry. A similar
2300 situation occurs when creating shared libraries and symbol
2301 visibility changes render the symbol local.
2303 If on the other hand, we are creating an executable, we
2304 may need to keep relocations for symbols satisfied by a
2305 dynamic library if we manage to avoid copy relocs for the
2307 if ((bfd_link_pic (info
)
2308 && (sec
->flags
& SEC_ALLOC
) != 0
2309 && (r_type
!= R_METAG_RELBRANCH
2311 && (! info
->symbolic
2312 || hh
->eh
.root
.type
== bfd_link_hash_defweak
2313 || !hh
->eh
.def_regular
))))
2314 || (!bfd_link_pic (info
)
2315 && (sec
->flags
& SEC_ALLOC
) != 0
2317 && (hh
->eh
.root
.type
== bfd_link_hash_defweak
2318 || !hh
->eh
.def_regular
)))
2320 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2321 struct elf_metag_dyn_reloc_entry
**hdh_head
;
2324 htab
->etab
.dynobj
= dynobj
= abfd
;
2326 /* When creating a shared object, we must copy these
2327 relocs into the output file. We create a reloc
2328 section in dynobj and make room for the reloc. */
2331 sreloc
= _bfd_elf_make_dynamic_reloc_section
2332 (sec
, htab
->etab
.dynobj
, 2, abfd
, /*rela?*/ TRUE
);
2336 bfd_set_error (bfd_error_bad_value
);
2340 elf_section_data (sec
)->sreloc
= sreloc
;
2343 /* If this is a global symbol, we count the number of
2344 relocations we need for this symbol. */
2346 hdh_head
= &((struct elf_metag_link_hash_entry
*) hh
)->dyn_relocs
;
2349 /* Track dynamic relocs needed for local syms too. */
2353 sr
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2357 vpp
= &elf_section_data (sr
)->local_dynrel
;
2358 hdh_head
= (struct elf_metag_dyn_reloc_entry
**) vpp
;
2362 if (hdh_p
== NULL
|| hdh_p
->sec
!= sec
)
2364 hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2365 bfd_alloc (dynobj
, sizeof *hdh_p
));
2368 hdh_p
->hdh_next
= *hdh_head
;
2372 hdh_p
->relative_count
= 0;
2376 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
2377 hdh_p
->relative_count
+= 1;
2381 /* This relocation describes the C++ object vtable hierarchy.
2382 Reconstruct it for later use during GC. */
2383 case R_METAG_GNU_VTINHERIT
:
2384 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, &hh
->eh
,
2389 /* This relocation describes which C++ vtable entries are actually
2390 used. Record for later use during GC. */
2391 case R_METAG_GNU_VTENTRY
:
2392 BFD_ASSERT (hh
!= NULL
);
2394 && !bfd_elf_gc_record_vtentry (abfd
, sec
, &hh
->eh
, rel
->r_addend
))
2403 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2406 elf_metag_copy_indirect_symbol (struct bfd_link_info
*info
,
2407 struct elf_link_hash_entry
*eh_dir
,
2408 struct elf_link_hash_entry
*eh_ind
)
2410 struct elf_metag_link_hash_entry
*hh_dir
, *hh_ind
;
2412 hh_dir
= metag_elf_hash_entry (eh_dir
);
2413 hh_ind
= metag_elf_hash_entry (eh_ind
);
2415 if (hh_ind
->dyn_relocs
!= NULL
)
2417 if (hh_dir
->dyn_relocs
!= NULL
)
2419 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2420 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2422 if (eh_ind
->root
.type
== bfd_link_hash_indirect
)
2425 /* Add reloc counts against the weak sym to the strong sym
2426 list. Merge any entries against the same section. */
2427 for (hdh_pp
= &hh_ind
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2429 struct elf_metag_dyn_reloc_entry
*hdh_q
;
2431 for (hdh_q
= hh_dir
->dyn_relocs
; hdh_q
!= NULL
;
2432 hdh_q
= hdh_q
->hdh_next
)
2433 if (hdh_q
->sec
== hdh_p
->sec
)
2435 hdh_q
->relative_count
+= hdh_p
->relative_count
;
2436 hdh_q
->count
+= hdh_p
->count
;
2437 *hdh_pp
= hdh_p
->hdh_next
;
2441 hdh_pp
= &hdh_p
->hdh_next
;
2443 *hdh_pp
= hh_dir
->dyn_relocs
;
2446 hh_dir
->dyn_relocs
= hh_ind
->dyn_relocs
;
2447 hh_ind
->dyn_relocs
= NULL
;
2450 if (eh_ind
->root
.type
== bfd_link_hash_indirect
2451 && eh_dir
->got
.refcount
<= 0)
2453 hh_dir
->tls_type
= hh_ind
->tls_type
;
2454 hh_ind
->tls_type
= GOT_UNKNOWN
;
2457 _bfd_elf_link_hash_copy_indirect (info
, eh_dir
, eh_ind
);
2460 /* Adjust a symbol defined by a dynamic object and referenced by a
2461 regular object. The current definition is in some section of the
2462 dynamic object, but we're not including those sections. We have to
2463 change the definition to something the rest of the link can
2467 elf_metag_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2468 struct elf_link_hash_entry
*eh
)
2470 struct elf_metag_link_hash_table
*htab
;
2471 struct elf_metag_link_hash_entry
*hh
;
2472 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2475 /* If this is a function, put it in the procedure linkage table. We
2476 will fill in the contents of the procedure linkage table later,
2477 when we know the address of the .got section. */
2478 if (eh
->type
== STT_FUNC
2481 if (eh
->plt
.refcount
<= 0
2482 || SYMBOL_CALLS_LOCAL (info
, eh
)
2483 || (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
2484 && eh
->root
.type
== bfd_link_hash_undefweak
))
2486 /* This case can occur if we saw a PLT reloc in an input
2487 file, but the symbol was never referred to by a dynamic
2488 object. In such a case, we don't actually need to build
2489 a procedure linkage table, and we can just do a PCREL
2491 eh
->plt
.offset
= (bfd_vma
) -1;
2498 eh
->plt
.offset
= (bfd_vma
) -1;
2500 /* If this is a weak symbol, and there is a real definition, the
2501 processor independent code will have arranged for us to see the
2502 real definition first, and we can just use the same value. */
2503 if (eh
->u
.weakdef
!= NULL
)
2505 if (eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defined
2506 && eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defweak
)
2508 eh
->root
.u
.def
.section
= eh
->u
.weakdef
->root
.u
.def
.section
;
2509 eh
->root
.u
.def
.value
= eh
->u
.weakdef
->root
.u
.def
.value
;
2510 eh
->non_got_ref
= eh
->u
.weakdef
->non_got_ref
;
2514 /* This is a reference to a symbol defined by a dynamic object which
2515 is not a function. */
2517 /* If we are creating a shared library, we must presume that the
2518 only references to the symbol are via the global offset table.
2519 For such cases we need not do anything here; the relocations will
2520 be handled correctly by relocate_section. */
2521 if (bfd_link_pic (info
))
2524 /* If there are no references to this symbol that do not use the
2525 GOT, we don't need to generate a copy reloc. */
2526 if (!eh
->non_got_ref
)
2529 /* If -z nocopyreloc was given, we won't generate them either. */
2530 if (info
->nocopyreloc
)
2532 eh
->non_got_ref
= 0;
2536 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2537 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2539 s
= hdh_p
->sec
->output_section
;
2540 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2544 /* If we didn't find any dynamic relocs in read-only sections, then
2545 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2548 eh
->non_got_ref
= 0;
2552 /* We must allocate the symbol in our .dynbss section, which will
2553 become part of the .bss section of the executable. There will be
2554 an entry for this symbol in the .dynsym section. The dynamic
2555 object will contain position independent code, so all references
2556 from the dynamic object to this symbol will go through the global
2557 offset table. The dynamic linker will use the .dynsym entry to
2558 determine the address it must put in the global offset table, so
2559 both the dynamic object and the regular object will refer to the
2560 same memory location for the variable. */
2562 htab
= metag_link_hash_table (info
);
2564 /* We must generate a COPY reloc to tell the dynamic linker to
2565 copy the initial value out of the dynamic object and into the
2566 runtime process image. */
2567 if ((eh
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2569 s
= htab
->etab
.sdynrelro
;
2570 srel
= htab
->etab
.sreldynrelro
;
2574 s
= htab
->etab
.sdynbss
;
2575 srel
= htab
->etab
.srelbss
;
2577 if ((eh
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && eh
->size
!= 0)
2579 srel
->size
+= sizeof (Elf32_External_Rela
);
2583 return _bfd_elf_adjust_dynamic_copy (info
, eh
, s
);
2586 /* Allocate space in .plt, .got and associated reloc sections for
2590 allocate_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2592 struct bfd_link_info
*info
;
2593 struct elf_metag_link_hash_table
*htab
;
2594 struct elf_metag_link_hash_entry
*hh
;
2595 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2597 if (eh
->root
.type
== bfd_link_hash_indirect
)
2600 if (eh
->root
.type
== bfd_link_hash_warning
)
2601 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2604 htab
= metag_link_hash_table (info
);
2606 if (htab
->etab
.dynamic_sections_created
2607 && eh
->plt
.refcount
> 0)
2609 /* Make sure this symbol is output as a dynamic symbol.
2610 Undefined weak syms won't yet be marked as dynamic. */
2611 if (eh
->dynindx
== -1
2612 && !eh
->forced_local
)
2614 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2618 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), eh
))
2620 asection
*s
= htab
->etab
.splt
;
2622 /* If this is the first .plt entry, make room for the special
2625 s
->size
+= PLT_ENTRY_SIZE
;
2627 eh
->plt
.offset
= s
->size
;
2629 /* If this symbol is not defined in a regular file, and we are
2630 not generating a shared library, then set the symbol to this
2631 location in the .plt. This is required to make function
2632 pointers compare as equal between the normal executable and
2633 the shared library. */
2634 if (! bfd_link_pic (info
)
2635 && !eh
->def_regular
)
2637 eh
->root
.u
.def
.section
= s
;
2638 eh
->root
.u
.def
.value
= eh
->plt
.offset
;
2641 /* Make room for this entry. */
2642 s
->size
+= PLT_ENTRY_SIZE
;
2644 /* We also need to make an entry in the .got.plt section, which
2645 will be placed in the .got section by the linker script. */
2646 htab
->etab
.sgotplt
->size
+= 4;
2648 /* We also need to make an entry in the .rel.plt section. */
2649 htab
->etab
.srelplt
->size
+= sizeof (Elf32_External_Rela
);
2653 eh
->plt
.offset
= (bfd_vma
) -1;
2659 eh
->plt
.offset
= (bfd_vma
) -1;
2663 if (eh
->got
.refcount
> 0)
2667 int tls_type
= metag_elf_hash_entry (eh
)->tls_type
;
2669 /* Make sure this symbol is output as a dynamic symbol.
2670 Undefined weak syms won't yet be marked as dynamic. */
2671 if (eh
->dynindx
== -1
2672 && !eh
->forced_local
)
2674 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2678 s
= htab
->etab
.sgot
;
2680 eh
->got
.offset
= s
->size
;
2682 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2683 if (tls_type
== GOT_TLS_GD
)
2685 dyn
= htab
->etab
.dynamic_sections_created
;
2686 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2687 R_METAG_TLS_GD needs one if local symbol and two if global. */
2688 if ((tls_type
== GOT_TLS_GD
&& eh
->dynindx
== -1)
2689 || (tls_type
== GOT_TLS_IE
&& dyn
))
2690 htab
->etab
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
2691 else if (tls_type
== GOT_TLS_GD
)
2692 htab
->etab
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rela
);
2693 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2694 bfd_link_pic (info
),
2696 htab
->etab
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
2699 eh
->got
.offset
= (bfd_vma
) -1;
2701 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2702 if (hh
->dyn_relocs
== NULL
)
2705 /* If this is a -Bsymbolic shared link, then we need to discard all
2706 space allocated for dynamic pc-relative relocs against symbols
2707 defined in a regular object. For the normal shared case, discard
2708 space for relocs that have become local due to symbol visibility
2710 if (bfd_link_pic (info
))
2712 if (SYMBOL_CALLS_LOCAL (info
, eh
))
2714 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2716 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2718 hdh_p
->count
-= hdh_p
->relative_count
;
2719 hdh_p
->relative_count
= 0;
2720 if (hdh_p
->count
== 0)
2721 *hdh_pp
= hdh_p
->hdh_next
;
2723 hdh_pp
= &hdh_p
->hdh_next
;
2727 /* Also discard relocs on undefined weak syms with non-default
2729 if (hh
->dyn_relocs
!= NULL
2730 && eh
->root
.type
== bfd_link_hash_undefweak
)
2732 if (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
)
2733 hh
->dyn_relocs
= NULL
;
2735 /* Make sure undefined weak symbols are output as a dynamic
2737 else if (eh
->dynindx
== -1
2738 && !eh
->forced_local
)
2740 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2747 /* For the non-shared case, discard space for relocs against
2748 symbols which turn out to need copy relocs or are not
2750 if (!eh
->non_got_ref
2751 && ((eh
->def_dynamic
2752 && !eh
->def_regular
)
2753 || (htab
->etab
.dynamic_sections_created
2754 && (eh
->root
.type
== bfd_link_hash_undefweak
2755 || eh
->root
.type
== bfd_link_hash_undefined
))))
2757 /* Make sure this symbol is output as a dynamic symbol.
2758 Undefined weak syms won't yet be marked as dynamic. */
2759 if (eh
->dynindx
== -1
2760 && !eh
->forced_local
)
2762 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2766 /* If that succeeded, we know we'll be keeping all the
2768 if (eh
->dynindx
!= -1)
2772 hh
->dyn_relocs
= NULL
;
2778 /* Finally, allocate space. */
2779 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2781 asection
*sreloc
= elf_section_data (hdh_p
->sec
)->sreloc
;
2782 sreloc
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2788 /* Find any dynamic relocs that apply to read-only sections. */
2791 readonly_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2793 struct elf_metag_link_hash_entry
*hh
;
2794 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2796 if (eh
->root
.type
== bfd_link_hash_warning
)
2797 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2799 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2800 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2802 asection
*s
= hdh_p
->sec
->output_section
;
2804 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2806 struct bfd_link_info
*info
= inf
;
2808 info
->flags
|= DF_TEXTREL
;
2810 /* Not an error, just cut short the traversal. */
2817 /* Set the sizes of the dynamic sections. */
2820 elf_metag_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2821 struct bfd_link_info
*info
)
2823 struct elf_metag_link_hash_table
*htab
;
2829 htab
= metag_link_hash_table (info
);
2830 dynobj
= htab
->etab
.dynobj
;
2834 if (htab
->etab
.dynamic_sections_created
)
2836 /* Set the contents of the .interp section to the interpreter. */
2837 if (bfd_link_executable (info
) && !info
->nointerp
)
2839 s
= bfd_get_linker_section (dynobj
, ".interp");
2842 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2843 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2847 /* Set up .got offsets for local syms, and space for local dynamic
2849 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2851 bfd_signed_vma
*local_got
;
2852 bfd_signed_vma
*end_local_got
;
2853 bfd_size_type locsymcount
;
2854 Elf_Internal_Shdr
*symtab_hdr
;
2856 char *local_tls_type
;
2858 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2861 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2863 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2865 for (hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2866 elf_section_data (s
)->local_dynrel
);
2868 hdh_p
= hdh_p
->hdh_next
)
2870 if (!bfd_is_abs_section (hdh_p
->sec
)
2871 && bfd_is_abs_section (hdh_p
->sec
->output_section
))
2873 /* Input section has been discarded, either because
2874 it is a copy of a linkonce section or due to
2875 linker script /DISCARD/, so we'll be discarding
2878 else if (hdh_p
->count
!= 0)
2880 srel
= elf_section_data (hdh_p
->sec
)->sreloc
;
2881 srel
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2882 if ((hdh_p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2883 info
->flags
|= DF_TEXTREL
;
2888 local_got
= elf_local_got_refcounts (ibfd
);
2892 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2893 locsymcount
= symtab_hdr
->sh_info
;
2894 end_local_got
= local_got
+ locsymcount
;
2895 local_tls_type
= metag_elf_local_got_tls_type (ibfd
);
2896 s
= htab
->etab
.sgot
;
2897 srel
= htab
->etab
.srelgot
;
2898 for (; local_got
< end_local_got
; ++local_got
)
2902 *local_got
= s
->size
;
2903 s
->size
+= GOT_ENTRY_SIZE
;
2904 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2905 if (*local_tls_type
== GOT_TLS_GD
)
2907 if (bfd_link_pic (info
))
2908 srel
->size
+= sizeof (Elf32_External_Rela
);
2911 *local_got
= (bfd_vma
) -1;
2916 if (htab
->tls_ldm_got
.refcount
> 0)
2918 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2920 htab
->tls_ldm_got
.offset
= htab
->etab
.sgot
->size
;
2921 htab
->etab
.sgot
->size
+= 8;
2922 htab
->etab
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
2925 htab
->tls_ldm_got
.offset
= -1;
2927 /* Allocate global sym .plt and .got entries, and space for global
2928 sym dynamic relocs. */
2929 elf_link_hash_traverse (&htab
->etab
, allocate_dynrelocs
, info
);
2931 /* We now have determined the sizes of the various dynamic sections.
2932 Allocate memory for them. */
2934 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2936 bfd_boolean reloc_section
= FALSE
;
2938 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2941 if (s
== htab
->etab
.splt
2942 || s
== htab
->etab
.sgot
2943 || s
== htab
->etab
.sgotplt
2944 || s
== htab
->etab
.sdynbss
2945 || s
== htab
->etab
.sdynrelro
)
2947 /* Strip this section if we don't need it; see the
2950 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2952 if (s
->size
!= 0 && s
!= htab
->etab
.srelplt
)
2955 /* We use the reloc_count field as a counter if we need
2956 to copy relocs into the output file. */
2958 reloc_section
= TRUE
;
2962 /* It's not one of our sections, so don't allocate space. */
2968 /* If we don't need this section, strip it from the
2969 output file. This is mostly to handle .rela.bss and
2970 .rela.plt. We must create both sections in
2971 create_dynamic_sections, because they must be created
2972 before the linker maps input sections to output
2973 sections. The linker does that before
2974 adjust_dynamic_symbol is called, and it is that
2975 function which decides whether anything needs to go
2976 into these sections. */
2977 s
->flags
|= SEC_EXCLUDE
;
2981 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2984 /* Allocate memory for the section contents. */
2985 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2986 if (s
->contents
== NULL
)
2988 else if (reloc_section
)
2990 unsigned char *contents
= s
->contents
;
2991 Elf32_External_Rela reloc
;
2993 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2994 memset(&reloc
, 0, sizeof(Elf32_External_Rela
));
2995 reloc
.r_info
[0] = R_METAG_NONE
;
2996 for (; contents
< (s
->contents
+ s
->size
);
2997 contents
+= sizeof(Elf32_External_Rela
))
2999 memcpy(contents
, &reloc
, sizeof(Elf32_External_Rela
));
3004 if (htab
->etab
.dynamic_sections_created
)
3006 /* Add some entries to the .dynamic section. We fill in the
3007 values later, in elf_metag_finish_dynamic_sections, but we
3008 must add the entries now so that we get the correct size for
3009 the .dynamic section. The DT_DEBUG entry is filled in by the
3010 dynamic linker and used by the debugger. */
3011 #define add_dynamic_entry(TAG, VAL) \
3012 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3014 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3017 if (bfd_link_executable (info
))
3019 if (!add_dynamic_entry (DT_DEBUG
, 0))
3023 if (htab
->etab
.srelplt
->size
!= 0)
3025 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3026 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3027 || !add_dynamic_entry (DT_JMPREL
, 0))
3033 if (!add_dynamic_entry (DT_RELA
, 0)
3034 || !add_dynamic_entry (DT_RELASZ
, 0)
3035 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3038 /* If any dynamic relocs apply to a read-only section,
3039 then we need a DT_TEXTREL entry. */
3040 if ((info
->flags
& DF_TEXTREL
) == 0)
3041 elf_link_hash_traverse (&htab
->etab
, readonly_dynrelocs
, info
);
3043 if ((info
->flags
& DF_TEXTREL
) != 0)
3045 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3050 #undef add_dynamic_entry
3055 /* Finish up dynamic symbol handling. We set the contents of various
3056 dynamic sections here. */
3059 elf_metag_finish_dynamic_symbol (bfd
*output_bfd
,
3060 struct bfd_link_info
*info
,
3061 struct elf_link_hash_entry
*eh
,
3062 Elf_Internal_Sym
*sym
)
3064 struct elf_metag_link_hash_table
*htab
;
3065 Elf_Internal_Rela rel
;
3068 htab
= metag_link_hash_table (info
);
3070 if (eh
->plt
.offset
!= (bfd_vma
) -1)
3080 if (eh
->plt
.offset
& 1)
3083 BFD_ASSERT (eh
->dynindx
!= -1);
3085 splt
= htab
->etab
.splt
;
3086 sgot
= htab
->etab
.sgotplt
;
3087 srela
= htab
->etab
.srelplt
;
3088 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
3090 /* Get the index in the procedure linkage table which
3091 corresponds to this symbol. This is the index of this symbol
3092 in all the symbols for which we are making plt entries. The
3093 first entry in the procedure linkage table is reserved. */
3094 plt_index
= eh
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3096 /* Get the offset into the .got.plt table of the entry that
3097 corresponds to this function. */
3098 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3100 BFD_ASSERT (got_offset
< (1 << 16));
3102 got_entry
= sgot
->output_section
->vma
3103 + sgot
->output_offset
3106 BFD_ASSERT (plt_index
< (1 << 16));
3108 /* Fill in the entry in the procedure linkage table. */
3109 if (! bfd_link_pic (info
))
3111 bfd_put_32 (output_bfd
,
3113 | (((got_entry
>> 16) & 0xffff) << 3)),
3114 splt
->contents
+ eh
->plt
.offset
);
3115 bfd_put_32 (output_bfd
,
3117 | ((got_entry
& 0xffff) << 3)),
3118 splt
->contents
+ eh
->plt
.offset
+ 4);
3119 bfd_put_32 (output_bfd
, plt_entry
[2],
3120 splt
->contents
+ eh
->plt
.offset
+ 8);
3121 bfd_put_32 (output_bfd
,
3122 (plt_entry
[3] | (plt_index
<< 3)),
3123 splt
->contents
+ eh
->plt
.offset
+ 12);
3124 bfd_put_32 (output_bfd
,
3126 | ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3127 splt
->contents
+ eh
->plt
.offset
+ 16);
3131 bfd_vma addr
= got_entry
- (splt
->output_section
->vma
+
3132 splt
->output_offset
+ eh
->plt
.offset
);
3134 bfd_put_32 (output_bfd
,
3135 plt_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3136 splt
->contents
+ eh
->plt
.offset
);
3137 bfd_put_32 (output_bfd
,
3138 plt_pic_entry
[1] | ((addr
& 0xffff) << 3),
3139 splt
->contents
+ eh
->plt
.offset
+ 4);
3140 bfd_put_32 (output_bfd
, plt_pic_entry
[2],
3141 splt
->contents
+ eh
->plt
.offset
+ 8);
3142 bfd_put_32 (output_bfd
,
3143 (plt_pic_entry
[3] | (plt_index
<< 3)),
3144 splt
->contents
+ eh
->plt
.offset
+ 12);
3145 bfd_put_32 (output_bfd
,
3147 + ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3148 splt
->contents
+ eh
->plt
.offset
+ 16);
3151 /* Fill in the entry in the global offset table. */
3152 bfd_put_32 (output_bfd
,
3153 (splt
->output_section
->vma
3154 + splt
->output_offset
3156 + 12), /* offset within PLT entry */
3157 sgot
->contents
+ got_offset
);
3159 /* Fill in the entry in the .rela.plt section. */
3160 rel
.r_offset
= (sgot
->output_section
->vma
3161 + sgot
->output_offset
3163 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_JMP_SLOT
);
3165 loc
= htab
->etab
.srelplt
->contents
;
3166 loc
+= plt_index
* sizeof(Elf32_External_Rela
);
3167 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3169 if (!eh
->def_regular
)
3171 /* Mark the symbol as undefined, rather than as defined in
3172 the .plt section. Leave the value alone. */
3173 sym
->st_shndx
= SHN_UNDEF
;
3177 if (eh
->got
.offset
!= (bfd_vma
) -1
3178 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_GD
) == 0
3179 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_IE
) == 0)
3181 /* This symbol has an entry in the global offset table. Set it
3184 rel
.r_offset
= ((eh
->got
.offset
&~ (bfd_vma
) 1)
3185 + htab
->etab
.sgot
->output_offset
3186 + htab
->etab
.sgot
->output_section
->vma
);
3188 /* If this is a -Bsymbolic link and the symbol is defined
3189 locally or was forced to be local because of a version file,
3190 we just want to emit a RELATIVE reloc. The entry in the
3191 global offset table will already have been initialized in the
3192 relocate_section function. */
3193 if (bfd_link_pic (info
)
3194 && (info
->symbolic
|| eh
->dynindx
== -1)
3197 rel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
3198 rel
.r_addend
= (eh
->root
.u
.def
.value
3199 + eh
->root
.u
.def
.section
->output_offset
3200 + eh
->root
.u
.def
.section
->output_section
->vma
);
3204 if ((eh
->got
.offset
& 1) != 0)
3206 bfd_put_32 (output_bfd
, 0, htab
->etab
.sgot
->contents
+ eh
->got
.offset
);
3207 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_GLOB_DAT
);
3211 loc
= htab
->etab
.srelgot
->contents
;
3212 loc
+= htab
->etab
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3213 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3220 /* This symbol needs a copy reloc. Set it up. */
3222 if (! (eh
->dynindx
!= -1
3223 && (eh
->root
.type
== bfd_link_hash_defined
3224 || eh
->root
.type
== bfd_link_hash_defweak
)))
3227 rel
.r_offset
= (eh
->root
.u
.def
.value
3228 + eh
->root
.u
.def
.section
->output_offset
3229 + eh
->root
.u
.def
.section
->output_section
->vma
);
3231 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_COPY
);
3232 if (eh
->root
.u
.def
.section
== htab
->etab
.sdynrelro
)
3233 s
= htab
->etab
.sreldynrelro
;
3235 s
= htab
->etab
.srelbss
;
3236 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3237 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3240 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3241 if (eh
->root
.root
.string
[0] == '_'
3242 && (strcmp (eh
->root
.root
.string
, "_DYNAMIC") == 0
3243 || eh
== htab
->etab
.hgot
))
3245 sym
->st_shndx
= SHN_ABS
;
3251 /* Set the Meta ELF ABI version. */
3254 elf_metag_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info
)
3256 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
3258 _bfd_elf_post_process_headers (abfd
, link_info
);
3259 i_ehdrp
= elf_elfheader (abfd
);
3260 i_ehdrp
->e_ident
[EI_ABIVERSION
] = METAG_ELF_ABI_VERSION
;
3263 /* Used to decide how to sort relocs in an optimal manner for the
3264 dynamic linker, before writing them out. */
3266 static enum elf_reloc_type_class
3267 elf_metag_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3268 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3269 const Elf_Internal_Rela
*rela
)
3271 switch ((int) ELF32_R_TYPE (rela
->r_info
))
3273 case R_METAG_RELATIVE
:
3274 return reloc_class_relative
;
3275 case R_METAG_JMP_SLOT
:
3276 return reloc_class_plt
;
3278 return reloc_class_copy
;
3280 return reloc_class_normal
;
3284 /* Finish up the dynamic sections. */
3287 elf_metag_finish_dynamic_sections (bfd
*output_bfd
,
3288 struct bfd_link_info
*info
)
3291 struct elf_metag_link_hash_table
*htab
;
3294 htab
= metag_link_hash_table (info
);
3295 dynobj
= htab
->etab
.dynobj
;
3297 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3299 if (htab
->etab
.dynamic_sections_created
)
3302 Elf32_External_Dyn
*dyncon
, *dynconend
;
3307 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3308 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3309 for (; dyncon
< dynconend
; dyncon
++)
3311 Elf_Internal_Dyn dyn
;
3314 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3322 s
= htab
->etab
.sgot
;
3323 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3324 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3328 s
= htab
->etab
.srelplt
;
3329 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3330 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3334 s
= htab
->etab
.srelplt
;
3335 dyn
.d_un
.d_val
= s
->size
;
3336 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3342 /* Fill in the first entry in the procedure linkage table. */
3343 splt
= htab
->etab
.splt
;
3344 if (splt
&& splt
->size
> 0)
3347 /* addr = .got + 4 */
3348 addr
= (htab
->etab
.sgot
->output_section
->vma
3349 + htab
->etab
.sgot
->output_offset
+ 4);
3350 if (bfd_link_pic (info
))
3352 addr
-= splt
->output_section
->vma
+ splt
->output_offset
;
3353 bfd_put_32 (output_bfd
,
3354 plt0_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3356 bfd_put_32 (output_bfd
,
3357 plt0_pic_entry
[1] | ((addr
& 0xffff) << 3),
3358 splt
->contents
+ 4);
3359 bfd_put_32 (output_bfd
, plt0_pic_entry
[2], splt
->contents
+ 8);
3360 bfd_put_32 (output_bfd
, plt0_pic_entry
[3], splt
->contents
+ 12);
3361 bfd_put_32 (output_bfd
, plt0_pic_entry
[4], splt
->contents
+ 16);
3365 bfd_put_32 (output_bfd
,
3366 plt0_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3368 bfd_put_32 (output_bfd
,
3369 plt0_entry
[1] | ((addr
& 0xffff) << 3),
3370 splt
->contents
+ 4);
3371 bfd_put_32 (output_bfd
, plt0_entry
[2], splt
->contents
+ 8);
3372 bfd_put_32 (output_bfd
, plt0_entry
[3], splt
->contents
+ 12);
3373 bfd_put_32 (output_bfd
, plt0_entry
[4], splt
->contents
+ 16);
3376 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
=
3381 if (htab
->etab
.sgot
!= NULL
&& htab
->etab
.sgot
->size
!= 0)
3383 /* Fill in the first entry in the global offset table.
3384 We use it to point to our dynamic section, if we have one. */
3385 bfd_put_32 (output_bfd
,
3386 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0,
3387 htab
->etab
.sgot
->contents
);
3389 /* The second entry is reserved for use by the dynamic linker. */
3390 memset (htab
->etab
.sgot
->contents
+ GOT_ENTRY_SIZE
, 0, GOT_ENTRY_SIZE
);
3392 /* Set .got entry size. */
3393 elf_section_data (htab
->etab
.sgot
->output_section
)
3394 ->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3400 /* Return the section that should be marked against GC for a given
3404 elf_metag_gc_mark_hook (asection
*sec
,
3405 struct bfd_link_info
*info
,
3406 Elf_Internal_Rela
*rela
,
3407 struct elf_link_hash_entry
*hh
,
3408 Elf_Internal_Sym
*sym
)
3411 switch ((unsigned int) ELF32_R_TYPE (rela
->r_info
))
3413 case R_METAG_GNU_VTINHERIT
:
3414 case R_METAG_GNU_VTENTRY
:
3418 return _bfd_elf_gc_mark_hook (sec
, info
, rela
, hh
, sym
);
3421 /* Update the got and plt entry reference counts for the section being
3425 elf_metag_gc_sweep_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
3426 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3427 asection
*sec ATTRIBUTE_UNUSED
,
3428 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
3430 Elf_Internal_Shdr
*symtab_hdr
;
3431 struct elf_link_hash_entry
**eh_syms
;
3432 bfd_signed_vma
*local_got_refcounts
;
3433 bfd_signed_vma
*local_plt_refcounts
;
3434 const Elf_Internal_Rela
*rel
, *relend
;
3436 if (bfd_link_relocatable (info
))
3439 elf_section_data (sec
)->local_dynrel
= NULL
;
3441 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3442 eh_syms
= elf_sym_hashes (abfd
);
3443 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3444 local_plt_refcounts
= local_got_refcounts
;
3445 if (local_plt_refcounts
!= NULL
)
3446 local_plt_refcounts
+= symtab_hdr
->sh_info
;
3448 relend
= relocs
+ sec
->reloc_count
;
3449 for (rel
= relocs
; rel
< relend
; rel
++)
3451 unsigned long r_symndx
;
3452 unsigned int r_type
;
3453 struct elf_link_hash_entry
*eh
= NULL
;
3455 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3456 if (r_symndx
>= symtab_hdr
->sh_info
)
3458 struct elf_metag_link_hash_entry
*hh
;
3459 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3460 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3462 eh
= eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
3463 while (eh
->root
.type
== bfd_link_hash_indirect
3464 || eh
->root
.type
== bfd_link_hash_warning
)
3465 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
3466 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3468 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3469 hdh_pp
= &hdh_p
->hdh_next
)
3470 if (hdh_p
->sec
== sec
)
3472 /* Everything must go for SEC. */
3473 *hdh_pp
= hdh_p
->hdh_next
;
3478 r_type
= ELF32_R_TYPE (rel
->r_info
);
3481 case R_METAG_TLS_LDM
:
3482 if (metag_link_hash_table (info
)->tls_ldm_got
.refcount
> 0)
3483 metag_link_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
3485 case R_METAG_TLS_IE
:
3486 case R_METAG_TLS_GD
:
3487 case R_METAG_GETSET_GOT
:
3490 if (eh
->got
.refcount
> 0)
3491 eh
->got
.refcount
-= 1;
3493 else if (local_got_refcounts
!= NULL
)
3495 if (local_got_refcounts
[r_symndx
] > 0)
3496 local_got_refcounts
[r_symndx
] -= 1;
3500 case R_METAG_RELBRANCH_PLT
:
3503 if (eh
->plt
.refcount
> 0)
3504 eh
->plt
.refcount
-= 1;
3508 case R_METAG_ADDR32
:
3509 case R_METAG_HIADDR16
:
3510 case R_METAG_LOADDR16
:
3511 case R_METAG_GETSETOFF
:
3512 case R_METAG_RELBRANCH
:
3515 struct elf_metag_link_hash_entry
*hh
;
3516 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3517 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3519 if (!bfd_link_pic (info
) && eh
->plt
.refcount
> 0)
3520 eh
->plt
.refcount
-= 1;
3522 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3524 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3525 hdh_pp
= &hdh_p
->hdh_next
)
3526 if (hdh_p
->sec
== sec
)
3528 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
3529 hdh_p
->relative_count
-= 1;
3531 if (hdh_p
->count
== 0)
3532 *hdh_pp
= hdh_p
->hdh_next
;
3546 /* Determine the type of stub needed, if any, for a call. */
3548 static enum elf_metag_stub_type
3549 metag_type_of_stub (asection
*input_sec
,
3550 const Elf_Internal_Rela
*rel
,
3551 struct elf_metag_link_hash_entry
*hh
,
3552 bfd_vma destination
,
3553 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3556 bfd_vma branch_offset
;
3557 bfd_vma max_branch_offset
;
3560 !(hh
->eh
.root
.type
== bfd_link_hash_defined
3561 || hh
->eh
.root
.type
== bfd_link_hash_defweak
))
3562 return metag_stub_none
;
3564 /* Determine where the call point is. */
3565 location
= (input_sec
->output_offset
3566 + input_sec
->output_section
->vma
3569 branch_offset
= destination
- location
;
3571 /* Determine if a long branch stub is needed. Meta branch offsets
3572 are signed 19 bits 4 byte aligned. */
3573 max_branch_offset
= (1 << (BRANCH_BITS
-1)) << 2;
3575 if (branch_offset
+ max_branch_offset
>= 2*max_branch_offset
)
3577 if (bfd_link_pic (info
))
3578 return metag_stub_long_branch_shared
;
3580 return metag_stub_long_branch
;
3583 return metag_stub_none
;
3586 #define MOVT_A0_3 0x82180005
3587 #define JUMP_A0_3 0xac180003
3589 #define MOVT_A1LBP 0x83080005
3590 #define ADD_A1LBP 0x83080000
3592 #define ADDT_A0_3_CPC 0x82980001
3593 #define ADD_A0_3_A0_3 0x82180000
3594 #define MOV_PC_A0_3 0xa3180ca0
3597 metag_build_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3599 struct elf_metag_stub_hash_entry
*hsh
;
3606 /* Massage our args to the form they really have. */
3607 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3609 stub_sec
= hsh
->stub_sec
;
3611 /* Make a note of the offset within the stubs for this entry. */
3612 hsh
->stub_offset
= stub_sec
->size
;
3613 loc
= stub_sec
->contents
+ hsh
->stub_offset
;
3615 stub_bfd
= stub_sec
->owner
;
3617 switch (hsh
->stub_type
)
3619 case metag_stub_long_branch_shared
:
3620 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3621 calculate the jump target using A0.3 as a temporary. Then a MOV
3622 to PC carries out the jump. */
3623 sym_value
= (hsh
->target_value
3624 + hsh
->target_section
->output_offset
3625 + hsh
->target_section
->output_section
->vma
3628 sym_value
-= (hsh
->stub_offset
3629 + stub_sec
->output_offset
3630 + stub_sec
->output_section
->vma
);
3632 bfd_put_32 (stub_bfd
, ADDT_A0_3_CPC
| (((sym_value
>> 16) & 0xffff) << 3),
3635 bfd_put_32 (stub_bfd
, ADD_A0_3_A0_3
| ((sym_value
& 0xffff) << 3),
3638 bfd_put_32 (stub_bfd
, MOV_PC_A0_3
, loc
+ 8);
3642 case metag_stub_long_branch
:
3643 /* A standard long branch stub is a MOVT instruction followed by a
3644 JUMP instruction using the A0.3 register as a temporary. This is
3645 the same method used by the LDLK linker (patch.c). */
3646 sym_value
= (hsh
->target_value
3647 + hsh
->target_section
->output_offset
3648 + hsh
->target_section
->output_section
->vma
3651 bfd_put_32 (stub_bfd
, MOVT_A0_3
| (((sym_value
>> 16) & 0xffff) << 3),
3654 bfd_put_32 (stub_bfd
, JUMP_A0_3
| ((sym_value
& 0xffff) << 3), loc
+ 4);
3663 stub_sec
->size
+= size
;
3667 /* As above, but don't actually build the stub. Just bump offset so
3668 we know stub section sizes. */
3671 metag_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3673 struct elf_metag_stub_hash_entry
*hsh
;
3676 /* Massage our args to the form they really have. */
3677 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3679 if (hsh
->stub_type
== metag_stub_long_branch
)
3681 else if (hsh
->stub_type
== metag_stub_long_branch_shared
)
3684 hsh
->stub_sec
->size
+= size
;
3688 /* Set up various things so that we can make a list of input sections
3689 for each output section included in the link. Returns -1 on error,
3690 0 when no stubs will be needed, and 1 on success. */
3693 elf_metag_setup_section_lists (bfd
*output_bfd
, struct bfd_link_info
*info
)
3696 unsigned int bfd_count
;
3697 unsigned int top_id
, top_index
;
3699 asection
**input_list
, **list
;
3701 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3703 /* Count the number of input BFDs and find the top input section id. */
3704 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3706 input_bfd
= input_bfd
->link
.next
)
3709 for (section
= input_bfd
->sections
;
3711 section
= section
->next
)
3713 if (top_id
< section
->id
)
3714 top_id
= section
->id
;
3718 htab
->bfd_count
= bfd_count
;
3720 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3721 htab
->stub_group
= bfd_zmalloc (amt
);
3722 if (htab
->stub_group
== NULL
)
3725 /* We can't use output_bfd->section_count here to find the top output
3726 section index as some sections may have been removed, and
3727 strip_excluded_output_sections doesn't renumber the indices. */
3728 for (section
= output_bfd
->sections
, top_index
= 0;
3730 section
= section
->next
)
3732 if (top_index
< section
->index
)
3733 top_index
= section
->index
;
3736 htab
->top_index
= top_index
;
3737 amt
= sizeof (asection
*) * (top_index
+ 1);
3738 input_list
= bfd_malloc (amt
);
3739 htab
->input_list
= input_list
;
3740 if (input_list
== NULL
)
3743 /* For sections we aren't interested in, mark their entries with a
3744 value we can check later. */
3745 list
= input_list
+ top_index
;
3747 *list
= bfd_abs_section_ptr
;
3748 while (list
-- != input_list
);
3750 for (section
= output_bfd
->sections
;
3752 section
= section
->next
)
3754 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3755 * have PC relative relocs in them but no code flag set. */
3756 if (((section
->flags
& SEC_CODE
) != 0) ||
3757 strcmp(".ctors", section
->name
) ||
3758 strcmp(".dtors", section
->name
))
3759 input_list
[section
->index
] = NULL
;
3765 /* The linker repeatedly calls this function for each input section,
3766 in the order that input sections are linked into output sections.
3767 Build lists of input sections to determine groupings between which
3768 we may insert linker stubs. */
3771 elf_metag_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3773 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3775 if (isec
->output_section
->index
<= htab
->top_index
)
3777 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3778 if (*list
!= bfd_abs_section_ptr
)
3780 /* Steal the link_sec pointer for our list. */
3781 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3782 /* This happens to make the list in reverse order,
3783 which is what we want. */
3784 PREV_SEC (isec
) = *list
;
3790 /* See whether we can group stub sections together. Grouping stub
3791 sections may result in fewer stubs. More importantly, we need to
3792 put all .init* and .fini* stubs at the beginning of the .init or
3793 .fini output sections respectively, because glibc splits the
3794 _init and _fini functions into multiple parts. Putting a stub in
3795 the middle of a function is not a good idea. */
3798 group_sections (struct elf_metag_link_hash_table
*htab
,
3799 bfd_size_type stub_group_size
,
3800 bfd_boolean stubs_always_before_branch
)
3802 asection
**list
= htab
->input_list
+ htab
->top_index
;
3805 asection
*tail
= *list
;
3806 if (tail
== bfd_abs_section_ptr
)
3808 while (tail
!= NULL
)
3812 bfd_size_type total
;
3813 bfd_boolean big_sec
;
3817 big_sec
= total
>= stub_group_size
;
3819 while ((prev
= PREV_SEC (curr
)) != NULL
3820 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3824 /* OK, the size from the start of CURR to the end is less
3825 than stub_group_size bytes and thus can be handled by one stub
3826 section. (or the tail section is itself larger than
3827 stub_group_size bytes, in which case we may be toast.)
3828 We should really be keeping track of the total size of
3829 stubs added here, as stubs contribute to the final output
3833 prev
= PREV_SEC (tail
);
3834 /* Set up this stub group. */
3835 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3837 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3839 /* But wait, there's more! Input sections up to stub_group_size
3840 bytes before the stub section can be handled by it too.
3841 Don't do this if we have a really large section after the
3842 stubs, as adding more stubs increases the chance that
3843 branches may not reach into the stub section. */
3844 if (!stubs_always_before_branch
&& !big_sec
)
3848 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3852 prev
= PREV_SEC (tail
);
3853 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3859 while (list
-- != htab
->input_list
);
3860 free (htab
->input_list
);
3864 /* Read in all local syms for all input bfds.
3865 Returns -1 on error, 0 otherwise. */
3868 get_local_syms (bfd
*output_bfd ATTRIBUTE_UNUSED
, bfd
*input_bfd
,
3869 struct bfd_link_info
*info
)
3871 unsigned int bfd_indx
;
3872 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
3873 int stub_changed
= 0;
3874 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3876 /* We want to read in symbol extension records only once. To do this
3877 we need to read in the local symbols in parallel and save them for
3878 later use; so hold pointers to the local symbols in an array. */
3879 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
3880 all_local_syms
= bfd_zmalloc (amt
);
3881 htab
->all_local_syms
= all_local_syms
;
3882 if (all_local_syms
== NULL
)
3885 /* Walk over all the input BFDs, swapping in local symbols. */
3888 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3890 Elf_Internal_Shdr
*symtab_hdr
;
3892 /* We'll need the symbol table in a second. */
3893 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3894 if (symtab_hdr
->sh_info
== 0)
3897 /* We need an array of the local symbols attached to the input bfd. */
3898 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3899 if (local_syms
== NULL
)
3901 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
3902 symtab_hdr
->sh_info
, 0,
3904 /* Cache them for elf_link_input_bfd. */
3905 symtab_hdr
->contents
= (unsigned char *) local_syms
;
3907 if (local_syms
== NULL
)
3910 all_local_syms
[bfd_indx
] = local_syms
;
3913 return stub_changed
;
3916 /* Determine and set the size of the stub section for a final link.
3918 The basic idea here is to examine all the relocations looking for
3919 PC-relative calls to a target that is unreachable with a "CALLR"
3922 /* See elf32-hppa.c and elf64-ppc.c. */
3925 elf_metag_size_stubs(bfd
*output_bfd
, bfd
*stub_bfd
,
3926 struct bfd_link_info
*info
,
3927 bfd_signed_vma group_size
,
3928 asection
* (*add_stub_section
) (const char *, asection
*),
3929 void (*layout_sections_again
) (void))
3931 bfd_size_type stub_group_size
;
3932 bfd_boolean stubs_always_before_branch
;
3933 bfd_boolean stub_changed
;
3934 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3936 /* Stash our params away. */
3937 htab
->stub_bfd
= stub_bfd
;
3938 htab
->add_stub_section
= add_stub_section
;
3939 htab
->layout_sections_again
= layout_sections_again
;
3940 stubs_always_before_branch
= group_size
< 0;
3942 stub_group_size
= -group_size
;
3944 stub_group_size
= group_size
;
3945 if (stub_group_size
== 1)
3947 /* Default values. */
3948 /* FIXME: not sure what these values should be */
3949 if (stubs_always_before_branch
)
3951 stub_group_size
= (1 << BRANCH_BITS
);
3955 stub_group_size
= (1 << BRANCH_BITS
);
3959 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3961 switch (get_local_syms (output_bfd
, info
->input_bfds
, info
))
3964 if (htab
->all_local_syms
)
3965 goto error_ret_free_local
;
3969 stub_changed
= FALSE
;
3973 stub_changed
= TRUE
;
3980 unsigned int bfd_indx
;
3983 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
3985 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3987 Elf_Internal_Shdr
*symtab_hdr
;
3989 Elf_Internal_Sym
*local_syms
;
3991 /* We'll need the symbol table in a second. */
3992 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3993 if (symtab_hdr
->sh_info
== 0)
3996 local_syms
= htab
->all_local_syms
[bfd_indx
];
3998 /* Walk over each section attached to the input bfd. */
3999 for (section
= input_bfd
->sections
;
4001 section
= section
->next
)
4003 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4005 /* If there aren't any relocs, then there's nothing more
4007 if ((section
->flags
& SEC_RELOC
) == 0
4008 || section
->reloc_count
== 0)
4011 /* If this section is a link-once section that will be
4012 discarded, then don't create any stubs. */
4013 if (section
->output_section
== NULL
4014 || section
->output_section
->owner
!= output_bfd
)
4017 /* Get the relocs. */
4019 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
, NULL
,
4021 if (internal_relocs
== NULL
)
4022 goto error_ret_free_local
;
4024 /* Now examine each relocation. */
4025 irela
= internal_relocs
;
4026 irelaend
= irela
+ section
->reloc_count
;
4027 for (; irela
< irelaend
; irela
++)
4029 unsigned int r_type
, r_indx
;
4030 enum elf_metag_stub_type stub_type
;
4031 struct elf_metag_stub_hash_entry
*hsh
;
4034 bfd_vma destination
;
4035 struct elf_metag_link_hash_entry
*hh
;
4037 const asection
*id_sec
;
4039 r_type
= ELF32_R_TYPE (irela
->r_info
);
4040 r_indx
= ELF32_R_SYM (irela
->r_info
);
4042 if (r_type
>= (unsigned int) R_METAG_MAX
)
4044 bfd_set_error (bfd_error_bad_value
);
4045 error_ret_free_internal
:
4046 if (elf_section_data (section
)->relocs
== NULL
)
4047 free (internal_relocs
);
4048 goto error_ret_free_local
;
4051 /* Only look for stubs on CALLR and B instructions. */
4052 if (!(r_type
== (unsigned int) R_METAG_RELBRANCH
||
4053 r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
))
4056 /* Now determine the call target, its name, value,
4062 if (r_indx
< symtab_hdr
->sh_info
)
4064 /* It's a local symbol. */
4065 Elf_Internal_Sym
*sym
;
4066 Elf_Internal_Shdr
*hdr
;
4069 sym
= local_syms
+ r_indx
;
4070 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4071 sym_value
= sym
->st_value
;
4072 shndx
= sym
->st_shndx
;
4073 if (shndx
< elf_numsections (input_bfd
))
4075 hdr
= elf_elfsections (input_bfd
)[shndx
];
4076 sym_sec
= hdr
->bfd_section
;
4077 destination
= (sym_value
+ irela
->r_addend
4078 + sym_sec
->output_offset
4079 + sym_sec
->output_section
->vma
);
4084 /* It's an external symbol. */
4087 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4088 hh
= ((struct elf_metag_link_hash_entry
*)
4089 elf_sym_hashes (input_bfd
)[e_indx
]);
4091 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
4092 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
4093 hh
= ((struct elf_metag_link_hash_entry
*)
4094 hh
->eh
.root
.u
.i
.link
);
4096 if (hh
->eh
.root
.type
== bfd_link_hash_defined
4097 || hh
->eh
.root
.type
== bfd_link_hash_defweak
)
4099 sym_sec
= hh
->eh
.root
.u
.def
.section
;
4100 sym_value
= hh
->eh
.root
.u
.def
.value
;
4101 if (hh
->eh
.plt
.offset
!= (bfd_vma
) -1
4102 && hh
->eh
.dynindx
!= -1
4103 && r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
)
4105 sym_sec
= htab
->etab
.splt
;
4106 sym_value
= hh
->eh
.plt
.offset
;
4109 if (sym_sec
->output_section
!= NULL
)
4110 destination
= (sym_value
+ irela
->r_addend
4111 + sym_sec
->output_offset
4112 + sym_sec
->output_section
->vma
);
4116 else if (hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
4118 if (! bfd_link_pic (info
))
4121 else if (hh
->eh
.root
.type
== bfd_link_hash_undefined
)
4123 if (! (info
->unresolved_syms_in_objects
== RM_IGNORE
4124 && (ELF_ST_VISIBILITY (hh
->eh
.other
)
4130 bfd_set_error (bfd_error_bad_value
);
4131 goto error_ret_free_internal
;
4135 /* Determine what (if any) linker stub is needed. */
4136 stub_type
= metag_type_of_stub (section
, irela
, hh
,
4138 if (stub_type
== metag_stub_none
)
4141 /* Support for grouping stub sections. */
4142 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4144 /* Get the name of this stub. */
4145 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, irela
);
4147 goto error_ret_free_internal
;
4149 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
4154 /* The proper stub has already been created. */
4159 hsh
= metag_add_stub (stub_name
, section
, htab
);
4163 goto error_ret_free_internal
;
4165 hsh
->target_value
= sym_value
;
4166 hsh
->target_section
= sym_sec
;
4167 hsh
->stub_type
= stub_type
;
4169 hsh
->addend
= irela
->r_addend
;
4170 stub_changed
= TRUE
;
4173 /* We're done with the internal relocs, free them. */
4174 if (elf_section_data (section
)->relocs
== NULL
)
4175 free (internal_relocs
);
4182 /* OK, we've added some stubs. Find out the new size of the
4184 for (stub_sec
= htab
->stub_bfd
->sections
;
4186 stub_sec
= stub_sec
->next
)
4189 bfd_hash_traverse (&htab
->bstab
, metag_size_one_stub
, htab
);
4191 /* Ask the linker to do its stuff. */
4192 (*htab
->layout_sections_again
) ();
4193 stub_changed
= FALSE
;
4196 free (htab
->all_local_syms
);
4199 error_ret_free_local
:
4200 free (htab
->all_local_syms
);
4204 /* Build all the stubs associated with the current output file. The
4205 stubs are kept in a hash table attached to the main linker hash
4206 table. This function is called via metagelf_finish in the linker. */
4209 elf_metag_build_stubs (struct bfd_link_info
*info
)
4212 struct bfd_hash_table
*table
;
4213 struct elf_metag_link_hash_table
*htab
;
4215 htab
= metag_link_hash_table (info
);
4217 for (stub_sec
= htab
->stub_bfd
->sections
;
4219 stub_sec
= stub_sec
->next
)
4223 /* Allocate memory to hold the linker stubs. */
4224 size
= stub_sec
->size
;
4225 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4226 if (stub_sec
->contents
== NULL
&& size
!= 0)
4231 /* Build the stubs as directed by the stub hash table. */
4232 table
= &htab
->bstab
;
4233 bfd_hash_traverse (table
, metag_build_one_stub
, info
);
4238 /* Return TRUE if SYM represents a local label symbol. */
4241 elf_metag_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
4243 if (name
[0] == '$' && name
[1] == 'L')
4245 return _bfd_elf_is_local_label_name (abfd
, name
);
4248 /* Return address for Ith PLT stub in section PLT, for relocation REL
4249 or (bfd_vma) -1 if it should not be included. */
4252 elf_metag_plt_sym_val (bfd_vma i
, const asection
*plt
,
4253 const arelent
*rel ATTRIBUTE_UNUSED
)
4255 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4258 #define ELF_ARCH bfd_arch_metag
4259 #define ELF_TARGET_ID METAG_ELF_DATA
4260 #define ELF_MACHINE_CODE EM_METAG
4261 #define ELF_MINPAGESIZE 0x1000
4262 #define ELF_MAXPAGESIZE 0x4000
4263 #define ELF_COMMONPAGESIZE 0x1000
4265 #define TARGET_LITTLE_SYM metag_elf32_vec
4266 #define TARGET_LITTLE_NAME "elf32-metag"
4268 #define elf_symbol_leading_char '_'
4270 #define elf_info_to_howto_rel NULL
4271 #define elf_info_to_howto metag_info_to_howto_rela
4273 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4274 #define bfd_elf32_bfd_link_hash_table_create \
4275 elf_metag_link_hash_table_create
4276 #define elf_backend_relocate_section elf_metag_relocate_section
4277 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4278 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4279 #define elf_backend_check_relocs elf_metag_check_relocs
4280 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4281 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4282 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4283 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4284 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4285 #define elf_backend_omit_section_dynsym \
4286 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4287 #define elf_backend_post_process_headers elf_metag_post_process_headers
4288 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4289 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4290 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4292 #define elf_backend_can_gc_sections 1
4293 #define elf_backend_can_refcount 1
4294 #define elf_backend_rela_normal 1
4295 #define elf_backend_want_got_plt 1
4296 #define elf_backend_want_got_sym 0
4297 #define elf_backend_want_plt_sym 0
4298 #define elf_backend_plt_readonly 1
4299 #define elf_backend_dtrel_excludes_plt 1
4300 #define elf_backend_want_dynrelro 1
4302 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4303 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4305 #include "elf32-target.h"