1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2016 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
37 static const unsigned int plt0_entry
[] =
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
46 static const unsigned int plt0_pic_entry
[] =
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
55 static const unsigned int plt_entry
[] =
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
64 static const unsigned int plt_pic_entry
[] =
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
89 elf_metag_dyn_reloc_entry "hdh"
91 Always remember to use GNU Coding Style. */
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
95 static reloc_howto_type elf_metag_howto_table
[] =
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16
, /* type */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
102 FALSE
, /* pc_relative */
104 complain_overflow_dont
, /* complain_on_overflow */
105 bfd_elf_generic_reloc
, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE
, /* partial_inplace */
109 0x0007fff8, /* dst_mask */
110 FALSE
), /* pcrel_offset */
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16
, /* type */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
117 FALSE
, /* pc_relative */
119 complain_overflow_dont
,/* complain_on_overflow */
120 bfd_elf_generic_reloc
, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE
, /* partial_inplace */
124 0x0007fff8, /* dst_mask */
125 FALSE
), /* pcrel_offset */
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32
, /* type */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
132 FALSE
, /* pc_relative */
134 complain_overflow_bitfield
, /* complain_on_overflow */
135 bfd_elf_generic_reloc
, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE
, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE
), /* pcrel_offset */
143 HOWTO (R_METAG_NONE
, /* type */
145 3, /* size (0 = byte, 1 = short, 2 = long) */
147 FALSE
, /* pc_relative */
149 complain_overflow_dont
, /* complain_on_overflow */
150 bfd_elf_generic_reloc
, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE
, /* partial_inplace */
155 FALSE
), /* pcrel_offset */
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH
, /* type */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
162 TRUE
, /* pc_relative */
164 complain_overflow_signed
, /* complain_on_overflow */
165 bfd_elf_generic_reloc
, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE
, /* partial_inplace */
169 0x00ffffe0, /* dst_mask */
170 FALSE
), /* pcrel_offset */
173 HOWTO (R_METAG_GETSETOFF
, /* type */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
177 FALSE
, /* pc_relative */
179 complain_overflow_dont
, /* complain_on_overflow */
180 bfd_elf_generic_reloc
, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE
, /* partial_inplace */
185 FALSE
), /* pcrel_offset */
212 HOWTO (R_METAG_GNU_VTINHERIT
, /* type */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
216 FALSE
, /* pc_relative */
218 complain_overflow_dont
, /* complain_on_overflow */
219 NULL
, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE
, /* partial_inplace */
224 FALSE
), /* pcrel_offset */
226 HOWTO (R_METAG_GNU_VTENTRY
, /* type */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
230 FALSE
, /* pc_relative */
232 complain_overflow_dont
, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE
, /* partial_inplace */
238 FALSE
), /* pcrel_offset */
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF
, /* type */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
245 FALSE
, /* pc_relative */
247 complain_overflow_dont
, /* complain_on_overflow */
248 bfd_elf_generic_reloc
, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE
, /* partial_inplace */
252 0x0007fff8, /* dst_mask */
253 FALSE
), /* pcrel_offset */
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF
, /* type */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
260 FALSE
, /* pc_relative */
262 complain_overflow_dont
, /* complain_on_overflow */
263 bfd_elf_generic_reloc
, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE
, /* partial_inplace */
267 0x0007fff8, /* dst_mask */
268 FALSE
), /* pcrel_offset */
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF
, /* type */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
275 FALSE
, /* pc_relative */
277 complain_overflow_dont
, /* complain_on_overflow */
278 bfd_elf_generic_reloc
, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE
, /* partial_inplace */
283 FALSE
), /* pcrel_offset */
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT
, /* type */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
290 FALSE
, /* pc_relative */
292 complain_overflow_dont
, /* complain_on_overflow */
293 bfd_elf_generic_reloc
, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE
, /* partial_inplace */
298 FALSE
), /* pcrel_offset */
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC
, /* type */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
305 FALSE
, /* pc_relative */
307 complain_overflow_dont
, /* complain_on_overflow */
308 bfd_elf_generic_reloc
, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE
, /* partial_inplace */
312 0x0007fff8, /* dst_mask */
313 FALSE
), /* pcrel_offset */
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC
, /* type */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
320 FALSE
, /* pc_relative */
322 complain_overflow_dont
, /* complain_on_overflow */
323 bfd_elf_generic_reloc
, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE
, /* partial_inplace */
327 0x0007fff8, /* dst_mask */
328 FALSE
), /* pcrel_offset */
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT
, /* type */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
335 FALSE
, /* pc_relative */
337 complain_overflow_dont
, /* complain_on_overflow */
338 bfd_elf_generic_reloc
, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE
, /* partial_inplace */
342 0x0007fff8, /* dst_mask */
343 FALSE
), /* pcrel_offset */
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT
, /* type */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
350 FALSE
, /* pc_relative */
352 complain_overflow_dont
, /* complain_on_overflow */
353 bfd_elf_generic_reloc
, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE
, /* partial_inplace */
357 0xffffffff, /* dst_mask */
358 FALSE
), /* pcrel_offset */
360 HOWTO (R_METAG_RELBRANCH_PLT
, /* type */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
364 TRUE
, /* pc_relative */
366 complain_overflow_signed
, /* complain_on_overflow */
367 bfd_elf_generic_reloc
, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE
, /* partial_inplace */
371 0x00ffffe0, /* dst_mask */
372 FALSE
), /* pcrel_offset */
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF
, /* type */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 FALSE
, /* pc_relative */
381 complain_overflow_bitfield
, /* complain_on_overflow */
382 bfd_elf_generic_reloc
, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE
, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE
), /* pcrel_offset */
389 HOWTO (R_METAG_PLT
, /* type */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_bitfield
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE
, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY
, /* type */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
412 FALSE
, /* pc_relative */
414 complain_overflow_bitfield
, /* complain_on_overflow */
415 bfd_elf_generic_reloc
, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE
, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE
), /* pcrel_offset */
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT
, /* type */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
427 FALSE
, /* pc_relative */
429 complain_overflow_bitfield
, /* complain_on_overflow */
430 bfd_elf_generic_reloc
, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE
, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE
), /* pcrel_offset */
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
440 HOWTO (R_METAG_RELATIVE
, /* type */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
444 FALSE
, /* pc_relative */
446 complain_overflow_bitfield
, /* complain_on_overflow */
447 bfd_elf_generic_reloc
, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE
, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE
), /* pcrel_offset */
454 HOWTO (R_METAG_GLOB_DAT
, /* type */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
458 FALSE
, /* pc_relative */
460 complain_overflow_bitfield
, /* complain_on_overflow */
461 bfd_elf_generic_reloc
, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE
, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE
), /* pcrel_offset */
468 HOWTO (R_METAG_TLS_GD
, /* type */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
472 FALSE
, /* pc_relative */
474 complain_overflow_dont
, /* complain_on_overflow */
475 bfd_elf_generic_reloc
, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE
, /* partial_inplace */
479 0x0007fff8, /* dst_mask */
480 FALSE
), /* pcrel_offset */
482 HOWTO (R_METAG_TLS_LDM
, /* type */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
486 FALSE
, /* pc_relative */
488 complain_overflow_bitfield
, /* complain_on_overflow */
489 bfd_elf_generic_reloc
, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE
, /* partial_inplace */
493 0x0007fff8, /* dst_mask */
494 FALSE
), /* pcrel_offset */
496 HOWTO (R_METAG_TLS_LDO_HI16
, /* type */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
500 FALSE
, /* pc_relative */
502 complain_overflow_bitfield
, /* complain_on_overflow */
503 bfd_elf_generic_reloc
, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE
, /* partial_inplace */
507 0x0007fff8, /* dst_mask */
508 FALSE
), /* pcrel_offset */
510 HOWTO (R_METAG_TLS_LDO_LO16
, /* type */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
514 FALSE
, /* pc_relative */
516 complain_overflow_bitfield
, /* complain_on_overflow */
517 bfd_elf_generic_reloc
, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE
, /* partial_inplace */
521 0x0007fff8, /* dst_mask */
522 FALSE
), /* pcrel_offset */
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO
, /* type */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
529 FALSE
, /* pc_relative */
531 complain_overflow_bitfield
, /* complain_on_overflow */
532 bfd_elf_generic_reloc
, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE
, /* partial_inplace */
536 0x0007fff8, /* dst_mask */
537 FALSE
), /* pcrel_offset */
539 HOWTO (R_METAG_TLS_IE
, /* type */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
543 FALSE
, /* pc_relative */
545 complain_overflow_dont
, /* complain_on_overflow */
546 bfd_elf_generic_reloc
, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE
, /* partial_inplace */
550 0x0007ff80, /* dst_mask */
551 FALSE
), /* pcrel_offset */
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC
, /* type */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
558 FALSE
, /* pc_relative */
560 complain_overflow_dont
, /* complain_on_overflow */
561 bfd_elf_generic_reloc
, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE
, /* partial_inplace */
565 0x0007fff8, /* dst_mask */
566 FALSE
), /* pcrel_offset */
568 HOWTO (R_METAG_TLS_IENONPIC_HI16
,/* type */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
572 FALSE
, /* pc_relative */
574 complain_overflow_dont
, /* complain_on_overflow */
575 bfd_elf_generic_reloc
, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE
, /* partial_inplace */
579 0x0007fff8, /* dst_mask */
580 FALSE
), /* pcrel_offset */
582 HOWTO (R_METAG_TLS_IENONPIC_LO16
,/* type */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
586 FALSE
, /* pc_relative */
588 complain_overflow_dont
, /* complain_on_overflow */
589 bfd_elf_generic_reloc
, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE
, /* partial_inplace */
593 0x0007fff8, /* dst_mask */
594 FALSE
), /* pcrel_offset */
596 HOWTO (R_METAG_TLS_TPOFF
, /* type */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
600 FALSE
, /* pc_relative */
602 complain_overflow_bitfield
, /* complain_on_overflow */
603 bfd_elf_generic_reloc
, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE
, /* partial_inplace */
607 0xffffffff, /* dst_mask */
608 FALSE
), /* pcrel_offset */
610 HOWTO (R_METAG_TLS_DTPMOD
, /* type */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
614 FALSE
, /* pc_relative */
616 complain_overflow_bitfield
, /* complain_on_overflow */
617 bfd_elf_generic_reloc
, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE
, /* partial_inplace */
621 0xffffffff, /* dst_mask */
622 FALSE
), /* pcrel_offset */
624 HOWTO (R_METAG_TLS_DTPOFF
, /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 FALSE
, /* pc_relative */
630 complain_overflow_bitfield
, /* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE
, /* partial_inplace */
635 0xffffffff, /* dst_mask */
636 FALSE
), /* pcrel_offset */
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE
, /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 FALSE
, /* pc_relative */
645 complain_overflow_bitfield
, /* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE
, /* partial_inplace */
650 0xffffffff, /* dst_mask */
651 FALSE
), /* pcrel_offset */
653 HOWTO (R_METAG_TLS_LE_HI16
, /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 FALSE
, /* pc_relative */
659 complain_overflow_dont
, /* complain_on_overflow */
660 bfd_elf_generic_reloc
, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE
, /* partial_inplace */
664 0x0007fff8, /* dst_mask */
665 FALSE
), /* pcrel_offset */
667 HOWTO (R_METAG_TLS_LE_LO16
, /* type */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
671 FALSE
, /* pc_relative */
673 complain_overflow_dont
, /* complain_on_overflow */
674 bfd_elf_generic_reloc
, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE
, /* partial_inplace */
678 0x0007fff8, /* dst_mask */
679 FALSE
), /* pcrel_offset */
683 #define BRANCH_BITS 19
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
696 struct metag_reloc_map
698 bfd_reloc_code_real_type bfd_reloc_val
;
699 unsigned int metag_reloc_val
;
702 static const struct metag_reloc_map metag_reloc_map
[] =
704 { BFD_RELOC_NONE
, R_METAG_NONE
},
705 { BFD_RELOC_32
, R_METAG_ADDR32
},
706 { BFD_RELOC_METAG_HIADDR16
, R_METAG_HIADDR16
},
707 { BFD_RELOC_METAG_LOADDR16
, R_METAG_LOADDR16
},
708 { BFD_RELOC_METAG_RELBRANCH
, R_METAG_RELBRANCH
},
709 { BFD_RELOC_METAG_GETSETOFF
, R_METAG_GETSETOFF
},
710 { BFD_RELOC_VTABLE_INHERIT
, R_METAG_GNU_VTINHERIT
},
711 { BFD_RELOC_VTABLE_ENTRY
, R_METAG_GNU_VTENTRY
},
712 { BFD_RELOC_METAG_REL8
, R_METAG_REL8
},
713 { BFD_RELOC_METAG_REL16
, R_METAG_REL16
},
714 { BFD_RELOC_METAG_HI16_GOTOFF
, R_METAG_HI16_GOTOFF
},
715 { BFD_RELOC_METAG_LO16_GOTOFF
, R_METAG_LO16_GOTOFF
},
716 { BFD_RELOC_METAG_GETSET_GOTOFF
, R_METAG_GETSET_GOTOFF
},
717 { BFD_RELOC_METAG_GETSET_GOT
, R_METAG_GETSET_GOT
},
718 { BFD_RELOC_METAG_HI16_GOTPC
, R_METAG_HI16_GOTPC
},
719 { BFD_RELOC_METAG_LO16_GOTPC
, R_METAG_LO16_GOTPC
},
720 { BFD_RELOC_METAG_HI16_PLT
, R_METAG_HI16_PLT
},
721 { BFD_RELOC_METAG_LO16_PLT
, R_METAG_LO16_PLT
},
722 { BFD_RELOC_METAG_RELBRANCH_PLT
, R_METAG_RELBRANCH_PLT
},
723 { BFD_RELOC_METAG_GOTOFF
, R_METAG_GOTOFF
},
724 { BFD_RELOC_METAG_PLT
, R_METAG_PLT
},
725 { BFD_RELOC_METAG_COPY
, R_METAG_COPY
},
726 { BFD_RELOC_METAG_JMP_SLOT
, R_METAG_JMP_SLOT
},
727 { BFD_RELOC_METAG_RELATIVE
, R_METAG_RELATIVE
},
728 { BFD_RELOC_METAG_GLOB_DAT
, R_METAG_GLOB_DAT
},
729 { BFD_RELOC_METAG_TLS_GD
, R_METAG_TLS_GD
},
730 { BFD_RELOC_METAG_TLS_LDM
, R_METAG_TLS_LDM
},
731 { BFD_RELOC_METAG_TLS_LDO_HI16
, R_METAG_TLS_LDO_HI16
},
732 { BFD_RELOC_METAG_TLS_LDO_LO16
, R_METAG_TLS_LDO_LO16
},
733 { BFD_RELOC_METAG_TLS_LDO
, R_METAG_TLS_LDO
},
734 { BFD_RELOC_METAG_TLS_IE
, R_METAG_TLS_IE
},
735 { BFD_RELOC_METAG_TLS_IENONPIC
, R_METAG_TLS_IENONPIC
},
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16
, R_METAG_TLS_IENONPIC_HI16
},
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16
, R_METAG_TLS_IENONPIC_LO16
},
738 { BFD_RELOC_METAG_TLS_TPOFF
, R_METAG_TLS_TPOFF
},
739 { BFD_RELOC_METAG_TLS_DTPMOD
, R_METAG_TLS_DTPMOD
},
740 { BFD_RELOC_METAG_TLS_DTPOFF
, R_METAG_TLS_DTPOFF
},
741 { BFD_RELOC_METAG_TLS_LE
, R_METAG_TLS_LE
},
742 { BFD_RELOC_METAG_TLS_LE_HI16
, R_METAG_TLS_LE_HI16
},
743 { BFD_RELOC_METAG_TLS_LE_LO16
, R_METAG_TLS_LE_LO16
},
746 enum elf_metag_stub_type
748 metag_stub_long_branch
,
749 metag_stub_long_branch_shared
,
753 struct elf_metag_stub_hash_entry
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root
;
758 /* The stub section. */
761 /* Offset within stub_sec of the beginning of this stub. */
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value
;
767 asection
*target_section
;
769 enum elf_metag_stub_type stub_type
;
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry
*hh
;
774 /* And the reloc addend that this was derived from. */
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
782 struct elf_metag_link_hash_entry
784 struct elf_link_hash_entry eh
;
786 /* A pointer to the most recently used stub hash entry against this
788 struct elf_metag_stub_hash_entry
*hsh_cache
;
790 /* Used to count relocations for delayed sizing of relocation
792 struct elf_metag_dyn_reloc_entry
{
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry
*hdh_next
;
797 /* The input section of the reloc. */
800 /* Number of relocs copied in this section. */
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count
;
809 GOT_UNKNOWN
= 0, GOT_NORMAL
= 1, GOT_TLS_IE
= 2, GOT_TLS_LDM
= 4, GOT_TLS_GD
= 8
813 struct elf_metag_link_hash_table
815 /* The main hash table. */
816 struct elf_link_hash_table etab
;
818 /* The stub hash table. */
819 struct bfd_hash_table bstab
;
821 /* Linker stub bfd. */
824 /* Linker call-backs. */
825 asection
* (*add_stub_section
) (const char *, asection
*);
826 void (*layout_sections_again
) (void);
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
832 /* This is the section to which stubs in the group will be
835 /* The stub section. */
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count
;
841 unsigned int top_index
;
842 asection
**input_list
;
843 Elf_Internal_Sym
**all_local_syms
;
845 /* Short-cuts to get to dynamic linker sections. */
854 /* Small local sym cache. */
855 struct sym_cache sym_cache
;
857 /* Data for LDM relocations. */
860 bfd_signed_vma refcount
;
865 /* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
869 dtpoff_base (struct bfd_link_info
*info
)
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info
)->tls_sec
== NULL
)
874 return elf_hash_table (info
)->tls_sec
->vma
;
877 /* Return the relocation value for R_METAG_TLS_IE */
879 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info
)->tls_sec
== NULL
)
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address
- elf_hash_table (info
)->tls_sec
->vma
887 + align_power ((bfd_vma
) 8,
888 elf_hash_table (info
)->tls_sec
->alignment_power
));
892 metag_info_to_howto_rela (bfd
*abfd ATTRIBUTE_UNUSED
,
894 Elf_Internal_Rela
*dst
)
898 r_type
= ELF32_R_TYPE (dst
->r_info
);
899 if (r_type
>= (unsigned int) R_METAG_MAX
)
901 /* xgettext:c-format */
902 _bfd_error_handler (_("%B: invalid METAG reloc number: %d"), abfd
, r_type
);
905 cache_ptr
->howto
= & elf_metag_howto_table
[r_type
];
908 static reloc_howto_type
*
909 metag_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
910 bfd_reloc_code_real_type code
)
914 for (i
= 0; i
< sizeof (metag_reloc_map
) / sizeof (metag_reloc_map
[0]); i
++)
915 if (metag_reloc_map
[i
].bfd_reloc_val
== code
)
916 return & elf_metag_howto_table
[metag_reloc_map
[i
].metag_reloc_val
];
921 static reloc_howto_type
*
922 metag_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
927 for (i
= 0; i
< sizeof (elf_metag_howto_table
) / sizeof (elf_metag_howto_table
[0]); i
++)
928 if (elf_metag_howto_table
[i
].name
!= NULL
929 && strcasecmp (elf_metag_howto_table
[i
].name
, r_name
) == 0)
930 return &elf_metag_howto_table
[i
];
935 /* Various hash macros and functions. */
936 #define metag_link_hash_table(p) \
937 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
938 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
940 #define metag_elf_hash_entry(ent) \
941 ((struct elf_metag_link_hash_entry *)(ent))
943 #define metag_stub_hash_entry(ent) \
944 ((struct elf_metag_stub_hash_entry *)(ent))
946 #define metag_stub_hash_lookup(table, string, create, copy) \
947 ((struct elf_metag_stub_hash_entry *) \
948 bfd_hash_lookup ((table), (string), (create), (copy)))
950 #define metag_elf_local_got_tls_type(abfd) \
951 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
953 /* Assorted hash table functions. */
955 /* Initialize an entry in the stub hash table. */
957 static struct bfd_hash_entry
*
958 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
959 struct bfd_hash_table
*table
,
962 /* Allocate the structure if it has not already been allocated by a
966 entry
= bfd_hash_allocate (table
,
967 sizeof (struct elf_metag_stub_hash_entry
));
972 /* Call the allocation method of the superclass. */
973 entry
= bfd_hash_newfunc (entry
, table
, string
);
976 struct elf_metag_stub_hash_entry
*hsh
;
978 /* Initialize the local fields. */
979 hsh
= (struct elf_metag_stub_hash_entry
*) entry
;
980 hsh
->stub_sec
= NULL
;
981 hsh
->stub_offset
= 0;
982 hsh
->target_value
= 0;
983 hsh
->target_section
= NULL
;
984 hsh
->stub_type
= metag_stub_long_branch
;
992 /* Initialize an entry in the link hash table. */
994 static struct bfd_hash_entry
*
995 metag_link_hash_newfunc (struct bfd_hash_entry
*entry
,
996 struct bfd_hash_table
*table
,
999 /* Allocate the structure if it has not already been allocated by a
1003 entry
= bfd_hash_allocate (table
,
1004 sizeof (struct elf_metag_link_hash_entry
));
1009 /* Call the allocation method of the superclass. */
1010 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1013 struct elf_metag_link_hash_entry
*hh
;
1015 /* Initialize the local fields. */
1016 hh
= (struct elf_metag_link_hash_entry
*) entry
;
1017 hh
->hsh_cache
= NULL
;
1018 hh
->dyn_relocs
= NULL
;
1019 hh
->tls_type
= GOT_UNKNOWN
;
1025 /* Free the derived linker hash table. */
1028 elf_metag_link_hash_table_free (bfd
*obfd
)
1030 struct elf_metag_link_hash_table
*htab
1031 = (struct elf_metag_link_hash_table
*) obfd
->link
.hash
;
1033 bfd_hash_table_free (&htab
->bstab
);
1034 _bfd_elf_link_hash_table_free (obfd
);
1037 /* Create the derived linker hash table. The Meta ELF port uses the derived
1038 hash table to keep information specific to the Meta ELF linker (without
1039 using static variables). */
1041 static struct bfd_link_hash_table
*
1042 elf_metag_link_hash_table_create (bfd
*abfd
)
1044 struct elf_metag_link_hash_table
*htab
;
1045 bfd_size_type amt
= sizeof (*htab
);
1047 htab
= bfd_zmalloc (amt
);
1051 if (!_bfd_elf_link_hash_table_init (&htab
->etab
, abfd
,
1052 metag_link_hash_newfunc
,
1053 sizeof (struct elf_metag_link_hash_entry
),
1060 /* Init the stub hash table too. */
1061 if (!bfd_hash_table_init (&htab
->bstab
, stub_hash_newfunc
,
1062 sizeof (struct elf_metag_stub_hash_entry
)))
1064 _bfd_elf_link_hash_table_free (abfd
);
1067 htab
->etab
.root
.hash_table_free
= elf_metag_link_hash_table_free
;
1069 return &htab
->etab
.root
;
1072 /* Section name for stubs is the associated section name plus this
1074 #define STUB_SUFFIX ".stub"
1076 /* Build a name for an entry in the stub hash table. */
1079 metag_stub_name (const asection
*input_section
,
1080 const asection
*sym_sec
,
1081 const struct elf_metag_link_hash_entry
*hh
,
1082 const Elf_Internal_Rela
*rel
)
1089 len
= 8 + 1 + strlen (hh
->eh
.root
.root
.string
) + 1 + 8 + 1;
1090 stub_name
= bfd_malloc (len
);
1091 if (stub_name
!= NULL
)
1093 sprintf (stub_name
, "%08x_%s+%x",
1094 input_section
->id
& 0xffffffff,
1095 hh
->eh
.root
.root
.string
,
1096 (int) rel
->r_addend
& 0xffffffff);
1101 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1102 stub_name
= bfd_malloc (len
);
1103 if (stub_name
!= NULL
)
1105 sprintf (stub_name
, "%08x_%x:%x+%x",
1106 input_section
->id
& 0xffffffff,
1107 sym_sec
->id
& 0xffffffff,
1108 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
1109 (int) rel
->r_addend
& 0xffffffff);
1115 /* Look up an entry in the stub hash. Stub entries are cached because
1116 creating the stub name takes a bit of time. */
1118 static struct elf_metag_stub_hash_entry
*
1119 metag_get_stub_entry (const asection
*input_section
,
1120 const asection
*sym_sec
,
1121 struct elf_metag_link_hash_entry
*hh
,
1122 const Elf_Internal_Rela
*rel
,
1123 struct elf_metag_link_hash_table
*htab
)
1125 struct elf_metag_stub_hash_entry
*hsh
;
1126 const asection
*id_sec
;
1128 /* If this input section is part of a group of sections sharing one
1129 stub section, then use the id of the first section in the group.
1130 Stub names need to include a section id, as there may well be
1131 more than one stub used to reach say, printf, and we need to
1132 distinguish between them. */
1133 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
1135 if (hh
!= NULL
&& hh
->hsh_cache
!= NULL
1136 && hh
->hsh_cache
->hh
== hh
1137 && hh
->hsh_cache
->id_sec
== id_sec
)
1139 hsh
= hh
->hsh_cache
;
1145 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, rel
);
1146 if (stub_name
== NULL
)
1149 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
1150 stub_name
, FALSE
, FALSE
);
1153 hh
->hsh_cache
= hsh
;
1161 /* Add a new stub entry to the stub hash. Not all fields of the new
1162 stub entry are initialised. */
1164 static struct elf_metag_stub_hash_entry
*
1165 metag_add_stub (const char *stub_name
,
1167 struct elf_metag_link_hash_table
*htab
)
1171 struct elf_metag_stub_hash_entry
*hsh
;
1173 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
1174 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
1175 if (stub_sec
== NULL
)
1177 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
1178 if (stub_sec
== NULL
)
1184 namelen
= strlen (link_sec
->name
);
1185 len
= namelen
+ sizeof (STUB_SUFFIX
);
1186 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
1190 memcpy (s_name
, link_sec
->name
, namelen
);
1191 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
1193 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
1194 if (stub_sec
== NULL
)
1196 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
1198 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
1201 /* Enter this entry into the linker stub hash table. */
1202 hsh
= metag_stub_hash_lookup (&htab
->bstab
, stub_name
,
1206 /* xgettext:c-format */
1207 _bfd_error_handler (_("%B: cannot create stub entry %s"),
1208 section
->owner
, stub_name
);
1212 hsh
->stub_sec
= stub_sec
;
1213 hsh
->stub_offset
= 0;
1214 hsh
->id_sec
= link_sec
;
1218 /* Check a signed integer value can be represented in the given number
1222 within_signed_range (int value
, unsigned int bits
)
1224 int min_val
= -(1 << (bits
- 1));
1225 int max_val
= (1 << (bits
- 1)) - 1;
1226 return (value
<= max_val
) && (value
>= min_val
);
1229 /* Perform a relocation as part of a final link. */
1231 static bfd_reloc_status_type
1232 metag_final_link_relocate (reloc_howto_type
*howto
,
1234 asection
*input_section
,
1236 Elf_Internal_Rela
*rel
,
1238 struct elf_metag_link_hash_entry
*hh
,
1239 struct elf_metag_link_hash_table
*htab
,
1242 bfd_reloc_status_type r
= bfd_reloc_ok
;
1243 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
1244 int opcode
, op_shift
, op_extended
, l1
, l2
;
1245 bfd_signed_vma srel
, addend
= rel
->r_addend
;
1246 struct elf_metag_stub_hash_entry
*hsh
= NULL
;
1249 /* Find out where we are and where we're going. */
1250 location
= (rel
->r_offset
+
1251 input_section
->output_offset
+
1252 input_section
->output_section
->vma
);
1254 switch (howto
->type
)
1256 case R_METAG_RELBRANCH
:
1257 case R_METAG_RELBRANCH_PLT
:
1258 /* Make it a pc relative offset. */
1259 relocation
-= location
;
1261 case R_METAG_TLS_GD
:
1262 case R_METAG_TLS_IE
:
1263 relocation
-= elf_gp (input_section
->output_section
->owner
);
1269 switch (howto
->type
)
1271 case R_METAG_RELBRANCH_PLT
:
1272 case R_METAG_RELBRANCH
:
1273 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1275 srel
= (bfd_signed_vma
) relocation
;
1278 /* If the branch is out of reach, then redirect the
1279 call to the local stub for this function. */
1280 if (srel
> ((1 << (BRANCH_BITS
+ 1)) - 1) ||
1281 (srel
< - (1 << (BRANCH_BITS
+ 1))))
1283 if (sym_sec
== NULL
)
1286 hsh
= metag_get_stub_entry (input_section
, sym_sec
,
1289 return bfd_reloc_undefined
;
1291 /* Munge up the value and addend so that we call the stub
1292 rather than the procedure directly. */
1293 srel
= (hsh
->stub_offset
1294 + hsh
->stub_sec
->output_offset
1295 + hsh
->stub_sec
->output_section
->vma
);
1301 if (!within_signed_range (srel
, BRANCH_BITS
))
1303 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1306 return bfd_reloc_overflow
;
1309 opcode
&= ~(0x7ffff << 5);
1310 opcode
|= ((srel
& 0x7ffff) << 5);
1312 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1314 case R_METAG_GETSETOFF
:
1315 case R_METAG_GETSET_GOT
:
1316 case R_METAG_GETSET_GOTOFF
:
1317 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1319 srel
= (bfd_signed_vma
) relocation
;
1322 /* Is this a standard or extended GET/SET? */
1323 if ((opcode
& 0xf0000000) == 0xa0000000)
1325 /* Extended GET/SET. */
1332 /* Standard GET/SET. */
1333 l1
= opcode
& 0x01000000;
1334 l2
= opcode
& 0x04000000;
1338 /* Calculate the width of the GET/SET and how much we need to
1339 shift the result by. */
1351 /* GET/SET offsets are scaled by the width of the transfer. */
1352 srel
= srel
>> op_shift
;
1354 /* Extended GET/SET has signed 12 bits of offset, standard has
1358 if (!within_signed_range (srel
, 12))
1360 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1363 return bfd_reloc_overflow
;
1365 opcode
&= ~(0xfff << 7);
1366 opcode
|= ((srel
& 0xfff) << 7);
1370 if (!within_signed_range (srel
, 5))
1372 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1375 return bfd_reloc_overflow
;
1377 opcode
&= ~(0x3f << 8);
1378 opcode
|= ((srel
& 0x3f) << 8);
1381 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1383 case R_METAG_TLS_GD
:
1384 case R_METAG_TLS_LDM
:
1385 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1387 if ((bfd_signed_vma
)relocation
< 0)
1389 /* sign extend immediate */
1390 if ((opcode
& 0xf2000001) == 0x02000000)
1392 /* ADD De.e,Dx.r,#I16 */
1396 return bfd_reloc_overflow
;
1399 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1401 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1402 contents
, rel
->r_offset
,
1403 relocation
, rel
->r_addend
);
1406 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1407 contents
, rel
->r_offset
,
1408 relocation
, rel
->r_addend
);
1414 /* This is defined because R_METAG_NONE != 0...
1415 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1416 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1417 rel, relend, howto, contents) \
1419 _bfd_clear_contents (howto, input_bfd, input_section, \
1420 contents + rel->r_offset); \
1422 if (bfd_link_relocatable (info) \
1423 && (input_section->flags & SEC_DEBUGGING)) \
1425 /* Only remove relocations in debug sections since other \
1426 sections may require relocations. */ \
1427 Elf_Internal_Shdr *rel_hdr; \
1429 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1431 /* Avoid empty output section. */ \
1432 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1434 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1435 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1436 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1438 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1440 input_section->reloc_count--; \
1447 rel->r_info = R_METAG_NONE; \
1448 rel->r_addend = 0; \
1452 /* Relocate a META ELF section.
1454 The RELOCATE_SECTION function is called by the new ELF backend linker
1455 to handle the relocations for a section.
1457 The relocs are always passed as Rela structures; if the section
1458 actually uses Rel structures, the r_addend field will always be
1461 This function is responsible for adjusting the section contents as
1462 necessary, and (if using Rela relocs and generating a relocatable
1463 output file) adjusting the reloc addend as necessary.
1465 This function does not have to worry about setting the reloc
1466 address or the reloc symbol index.
1468 LOCAL_SYMS is a pointer to the swapped in local symbols.
1470 LOCAL_SECTIONS is an array giving the section in the input file
1471 corresponding to the st_shndx field of each local symbol.
1473 The global hash table entry for the global symbols can be found
1474 via elf_sym_hashes (input_bfd).
1476 When generating relocatable output, this function must handle
1477 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1478 going to be the section symbol corresponding to the output
1479 section, which means that the addend must be adjusted
1483 elf_metag_relocate_section (bfd
*output_bfd
,
1484 struct bfd_link_info
*info
,
1486 asection
*input_section
,
1488 Elf_Internal_Rela
*relocs
,
1489 Elf_Internal_Sym
*local_syms
,
1490 asection
**local_sections
)
1492 bfd_vma
*local_got_offsets
;
1493 Elf_Internal_Shdr
*symtab_hdr
;
1494 struct elf_link_hash_entry
**eh_syms
;
1495 struct elf_metag_link_hash_table
*htab
;
1496 Elf_Internal_Rela
*rel
;
1497 Elf_Internal_Rela
*relend
;
1500 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1501 eh_syms
= elf_sym_hashes (input_bfd
);
1502 relend
= relocs
+ input_section
->reloc_count
;
1504 htab
= metag_link_hash_table (info
);
1505 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1509 for (rel
= relocs
; rel
< relend
; rel
++)
1511 reloc_howto_type
*howto
;
1512 unsigned long r_symndx
;
1513 Elf_Internal_Sym
*sym
;
1515 struct elf_metag_link_hash_entry
*hh
;
1517 bfd_reloc_status_type r
;
1521 r_type
= ELF32_R_TYPE (rel
->r_info
);
1523 if (r_type
== R_METAG_GNU_VTINHERIT
1524 || r_type
== R_METAG_GNU_VTENTRY
1525 || r_type
== R_METAG_NONE
)
1528 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1530 howto
= elf_metag_howto_table
+ ELF32_R_TYPE (rel
->r_info
);
1535 if (r_symndx
< symtab_hdr
->sh_info
)
1537 sym
= local_syms
+ r_symndx
;
1538 sec
= local_sections
[r_symndx
];
1539 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1541 name
= bfd_elf_string_from_elf_section
1542 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
1543 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
1547 struct elf_link_hash_entry
*eh
;
1548 bfd_boolean unresolved_reloc
, warned
, ignored
;
1550 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1551 r_symndx
, symtab_hdr
, eh_syms
,
1552 eh
, sec
, relocation
,
1553 unresolved_reloc
, warned
, ignored
);
1555 name
= eh
->root
.root
.string
;
1556 hh
= (struct elf_metag_link_hash_entry
*) eh
;
1559 if (sec
!= NULL
&& discarded_section (sec
))
1560 METAG_RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1561 rel
, relend
, howto
, contents
);
1563 if (bfd_link_relocatable (info
))
1568 case R_METAG_ADDR32
:
1569 case R_METAG_RELBRANCH
:
1570 if ((input_section
->flags
& SEC_ALLOC
) == 0)
1573 if ((bfd_link_pic (info
)
1574 && r_symndx
!= STN_UNDEF
1575 && (input_section
->flags
& SEC_ALLOC
) != 0
1576 && (r_type
!= R_METAG_RELBRANCH
1577 || !SYMBOL_CALLS_LOCAL (info
, &hh
->eh
)))
1578 || (!bfd_link_pic (info
)
1580 && hh
->eh
.dynindx
!= -1
1581 && !hh
->eh
.non_got_ref
1582 && ((hh
->eh
.def_dynamic
1583 && !hh
->eh
.def_regular
)
1584 || hh
->eh
.root
.type
== bfd_link_hash_undefweak
1585 || hh
->eh
.root
.type
== bfd_link_hash_undefined
)))
1587 Elf_Internal_Rela outrel
;
1588 bfd_boolean skip
, relocate
;
1591 /* When generating a shared object, these relocations
1592 are copied into the output file to be resolved at run
1595 sreloc
= elf_section_data (input_section
)->sreloc
;
1596 BFD_ASSERT (sreloc
!= NULL
);
1601 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
1605 if (outrel
.r_offset
== (bfd_vma
) -1)
1607 else if (outrel
.r_offset
== (bfd_vma
) -2)
1608 skip
= TRUE
, relocate
= TRUE
;
1609 outrel
.r_offset
+= (input_section
->output_section
->vma
1610 + input_section
->output_offset
);
1614 memset (&outrel
, 0, sizeof outrel
);
1615 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_NONE
);
1617 else if (r_type
== R_METAG_RELBRANCH
)
1619 BFD_ASSERT (hh
!= NULL
&& hh
->eh
.dynindx
!= -1);
1620 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1621 outrel
.r_addend
= rel
->r_addend
;
1625 /* h->dynindx may be -1 if this symbol was marked to
1628 || ((info
->symbolic
|| hh
->eh
.dynindx
== -1)
1629 && hh
->eh
.def_regular
))
1632 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1633 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1637 BFD_ASSERT (hh
->eh
.dynindx
!= -1);
1638 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1639 outrel
.r_addend
= rel
->r_addend
;
1643 loc
= sreloc
->contents
;
1644 loc
+= sreloc
->reloc_count
* sizeof(Elf32_External_Rela
);
1645 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,loc
);
1646 ++sreloc
->reloc_count
;
1648 /* If this reloc is against an external symbol, we do
1649 not want to fiddle with the addend. Otherwise, we
1650 need to include the symbol value so that it becomes
1651 an addend for the dynamic reloc. */
1657 case R_METAG_RELBRANCH_PLT
:
1658 /* Relocation is to the entry for this symbol in the
1659 procedure linkage table. */
1664 if (hh
->eh
.forced_local
)
1667 if (hh
->eh
.plt
.offset
== (bfd_vma
) -1 ||
1670 /* We didn't make a PLT entry for this symbol. This
1671 happens when statically linking PIC code, or when
1672 using -Bsymbolic. */
1676 relocation
= (htab
->splt
->output_section
->vma
1677 + htab
->splt
->output_offset
1678 + hh
->eh
.plt
.offset
);
1680 case R_METAG_HI16_GOTPC
:
1681 case R_METAG_LO16_GOTPC
:
1682 BFD_ASSERT (htab
->sgot
!= NULL
);
1684 relocation
= (htab
->sgot
->output_section
->vma
+
1685 htab
->sgot
->output_offset
);
1686 relocation
+= GOT_REG_OFFSET
;
1687 relocation
-= (input_section
->output_section
->vma
1688 + input_section
->output_offset
1691 case R_METAG_HI16_GOTOFF
:
1692 case R_METAG_LO16_GOTOFF
:
1693 case R_METAG_GETSET_GOTOFF
:
1694 BFD_ASSERT (htab
->sgot
!= NULL
);
1696 relocation
-= (htab
->sgot
->output_section
->vma
+
1697 htab
->sgot
->output_offset
);
1698 relocation
-= GOT_REG_OFFSET
;
1700 case R_METAG_GETSET_GOT
:
1703 bfd_boolean do_got
= 0;
1705 /* Relocation is to the entry for this symbol in the
1706 global offset table. */
1711 off
= hh
->eh
.got
.offset
;
1712 dyn
= htab
->etab
.dynamic_sections_created
;
1713 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1714 bfd_link_pic (info
),
1717 /* If we aren't going to call finish_dynamic_symbol,
1718 then we need to handle initialisation of the .got
1719 entry and create needed relocs here. Since the
1720 offset must always be a multiple of 4, we use the
1721 least significant bit to record whether we have
1722 initialised it already. */
1727 hh
->eh
.got
.offset
|= 1;
1734 /* Local symbol case. */
1735 if (local_got_offsets
== NULL
)
1738 off
= local_got_offsets
[r_symndx
];
1740 /* The offset must always be a multiple of 4. We use
1741 the least significant bit to record whether we have
1742 already generated the necessary reloc. */
1747 local_got_offsets
[r_symndx
] |= 1;
1754 if (bfd_link_pic (info
))
1756 /* Output a dynamic relocation for this GOT entry.
1757 In this case it is relative to the base of the
1758 object because the symbol index is zero. */
1759 Elf_Internal_Rela outrel
;
1761 asection
*s
= htab
->srelgot
;
1763 outrel
.r_offset
= (off
1764 + htab
->sgot
->output_offset
1765 + htab
->sgot
->output_section
->vma
);
1766 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1767 outrel
.r_addend
= relocation
;
1769 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1770 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1773 bfd_put_32 (output_bfd
, relocation
,
1774 htab
->sgot
->contents
+ off
);
1777 if (off
>= (bfd_vma
) -2)
1780 relocation
= off
- GOT_REG_OFFSET
;
1783 case R_METAG_TLS_GD
:
1784 case R_METAG_TLS_IE
:
1786 /* XXXMJF There is room here for optimisations. For example
1787 converting from GD->IE, etc. */
1792 if (htab
->sgot
== NULL
)
1799 dyn
= htab
->etab
.dynamic_sections_created
;
1801 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1802 bfd_link_pic (info
),
1804 && (!bfd_link_pic (info
)
1805 || !SYMBOL_REFERENCES_LOCAL (info
, &hh
->eh
)))
1807 indx
= hh
->eh
.dynindx
;
1809 off
= hh
->eh
.got
.offset
;
1810 tls_type
= hh
->tls_type
;
1814 /* Local symbol case. */
1815 if (local_got_offsets
== NULL
)
1818 off
= local_got_offsets
[r_symndx
];
1819 tls_type
= metag_elf_local_got_tls_type (input_bfd
) [r_symndx
];
1822 if (tls_type
== GOT_UNKNOWN
)
1829 bfd_boolean need_relocs
= FALSE
;
1830 Elf_Internal_Rela outrel
;
1831 bfd_byte
*loc
= NULL
;
1834 /* The GOT entries have not been initialized yet. Do it
1835 now, and emit any relocations. If both an IE GOT and a
1836 GD GOT are necessary, we emit the GD first. */
1838 if ((bfd_link_pic (info
) || indx
!= 0)
1840 || ELF_ST_VISIBILITY (hh
->eh
.other
) == STV_DEFAULT
1841 || hh
->eh
.root
.type
!= bfd_link_hash_undefweak
))
1844 loc
= htab
->srelgot
->contents
;
1845 /* FIXME (CAO): Should this be reloc_count++ ? */
1846 loc
+= htab
->srelgot
->reloc_count
* sizeof (Elf32_External_Rela
);
1849 if (tls_type
& GOT_TLS_GD
)
1853 outrel
.r_offset
= (cur_off
1854 + htab
->sgot
->output_section
->vma
1855 + htab
->sgot
->output_offset
);
1856 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_DTPMOD
);
1857 outrel
.r_addend
= 0;
1858 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ cur_off
);
1860 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1861 htab
->srelgot
->reloc_count
++;
1862 loc
+= sizeof (Elf32_External_Rela
);
1865 bfd_put_32 (output_bfd
, 0,
1866 htab
->sgot
->contents
+ cur_off
+ 4);
1869 bfd_put_32 (output_bfd
, 0,
1870 htab
->sgot
->contents
+ cur_off
+ 4);
1871 outrel
.r_info
= ELF32_R_INFO (indx
,
1872 R_METAG_TLS_DTPOFF
);
1873 outrel
.r_offset
+= 4;
1874 bfd_elf32_swap_reloca_out (output_bfd
,
1876 htab
->srelgot
->reloc_count
++;
1877 loc
+= sizeof (Elf32_External_Rela
);
1882 /* We don't support changing the TLS model. */
1889 if (tls_type
& GOT_TLS_IE
)
1893 outrel
.r_offset
= (cur_off
1894 + htab
->sgot
->output_section
->vma
1895 + htab
->sgot
->output_offset
);
1896 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_TPOFF
);
1899 outrel
.r_addend
= relocation
- dtpoff_base (info
);
1901 outrel
.r_addend
= 0;
1903 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1904 htab
->srelgot
->reloc_count
++;
1905 loc
+= sizeof (Elf32_External_Rela
);
1908 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
1909 htab
->sgot
->contents
+ cur_off
);
1915 hh
->eh
.got
.offset
|= 1;
1917 local_got_offsets
[r_symndx
] |= 1;
1920 /* Add the base of the GOT to the relocation value. */
1921 relocation
= off
- GOT_REG_OFFSET
;
1926 case R_METAG_TLS_IENONPIC_HI16
:
1927 case R_METAG_TLS_IENONPIC_LO16
:
1928 case R_METAG_TLS_LE_HI16
:
1929 case R_METAG_TLS_LE_LO16
:
1930 if (bfd_link_pic (info
))
1933 /* xgettext:c-format */
1934 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1935 input_bfd
, input_section
,
1936 (long) rel
->r_offset
, howto
->name
);
1940 relocation
= tpoff (info
, relocation
);
1942 case R_METAG_TLS_LDO_HI16
:
1943 case R_METAG_TLS_LDO_LO16
:
1944 if (! bfd_link_pic (info
))
1945 relocation
= tpoff (info
, relocation
);
1947 relocation
-= dtpoff_base (info
);
1949 case R_METAG_TLS_LDM
:
1953 if (htab
->sgot
== NULL
)
1955 off
= htab
->tls_ldm_got
.offset
;
1960 Elf_Internal_Rela outrel
;
1963 outrel
.r_offset
= (off
1964 + htab
->sgot
->output_section
->vma
1965 + htab
->sgot
->output_offset
);
1967 outrel
.r_addend
= 0;
1968 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_TLS_DTPMOD
);
1969 loc
= htab
->srelgot
->contents
;
1970 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1971 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1972 htab
->tls_ldm_got
.offset
|= 1;
1975 relocation
= off
- GOT_REG_OFFSET
;
1982 r
= metag_final_link_relocate (howto
, input_bfd
, input_section
,
1983 contents
, rel
, relocation
, hh
, htab
,
1986 if (r
!= bfd_reloc_ok
)
1988 const char * msg
= (const char *) NULL
;
1992 case bfd_reloc_overflow
:
1993 (*info
->callbacks
->reloc_overflow
)
1994 (info
, (hh
? &hh
->eh
.root
: NULL
), name
, howto
->name
,
1995 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1998 case bfd_reloc_undefined
:
1999 (*info
->callbacks
->undefined_symbol
)
2000 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
2003 case bfd_reloc_outofrange
:
2004 msg
= _("internal error: out of range error");
2007 case bfd_reloc_notsupported
:
2008 msg
= _("internal error: unsupported relocation error");
2011 case bfd_reloc_dangerous
:
2012 msg
= _("internal error: dangerous relocation");
2016 msg
= _("internal error: unknown error");
2021 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
2022 input_section
, rel
->r_offset
);
2029 /* Create the .plt and .got sections, and set up our hash table
2030 short-cuts to various dynamic sections. */
2033 elf_metag_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
2035 struct elf_metag_link_hash_table
*htab
;
2036 struct elf_link_hash_entry
*eh
;
2037 struct bfd_link_hash_entry
*bh
;
2038 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2040 /* Don't try to create the .plt and .got twice. */
2041 htab
= metag_link_hash_table (info
);
2042 if (htab
->splt
!= NULL
)
2045 /* Call the generic code to do most of the work. */
2046 if (! _bfd_elf_create_dynamic_sections (abfd
, info
))
2049 htab
->sgot
= bfd_get_linker_section (abfd
, ".got");
2053 htab
->sgotplt
= bfd_make_section_with_flags (abfd
, ".got.plt",
2054 (SEC_ALLOC
| SEC_LOAD
|
2057 SEC_LINKER_CREATED
));
2058 if (htab
->sgotplt
== NULL
2059 || !bfd_set_section_alignment (abfd
, htab
->sgotplt
, 2))
2062 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2063 section. We don't do this in the linker script because we don't want
2064 to define the symbol if we are not creating a global offset table. */
2066 if (!(_bfd_generic_link_add_one_symbol
2067 (info
, abfd
, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL
, htab
->sgot
,
2068 (bfd_vma
) 0, NULL
, FALSE
, bed
->collect
, &bh
)))
2070 eh
= (struct elf_link_hash_entry
*) bh
;
2071 eh
->def_regular
= 1;
2072 eh
->type
= STT_OBJECT
;
2073 eh
->other
= STV_HIDDEN
;
2075 if (! bfd_link_executable (info
)
2076 && ! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2079 elf_hash_table (info
)->hgot
= eh
;
2081 htab
->splt
= bfd_get_linker_section (abfd
, ".plt");
2082 htab
->srelplt
= bfd_get_linker_section (abfd
, ".rela.plt");
2084 htab
->srelgot
= bfd_get_linker_section (abfd
, ".rela.got");
2086 htab
->sdynbss
= bfd_get_linker_section (abfd
, ".dynbss");
2087 htab
->srelbss
= bfd_get_linker_section (abfd
, ".rela.bss");
2092 /* Look through the relocs for a section during the first phase, and
2093 calculate needed space in the global offset table, procedure linkage
2094 table, and dynamic reloc sections. At this point we haven't
2095 necessarily read all the input files. */
2098 elf_metag_check_relocs (bfd
*abfd
,
2099 struct bfd_link_info
*info
,
2101 const Elf_Internal_Rela
*relocs
)
2103 Elf_Internal_Shdr
*symtab_hdr
;
2104 struct elf_link_hash_entry
**eh_syms
;
2105 const Elf_Internal_Rela
*rel
;
2106 const Elf_Internal_Rela
*rel_end
;
2107 struct elf_metag_link_hash_table
*htab
;
2110 int tls_type
= GOT_UNKNOWN
, old_tls_type
= GOT_UNKNOWN
;
2112 if (bfd_link_relocatable (info
))
2115 htab
= metag_link_hash_table (info
);
2116 dynobj
= htab
->etab
.dynobj
;
2117 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2118 eh_syms
= elf_sym_hashes (abfd
);
2124 rel_end
= relocs
+ sec
->reloc_count
;
2125 for (rel
= relocs
; rel
< rel_end
; rel
++)
2128 struct elf_metag_link_hash_entry
*hh
;
2129 Elf_Internal_Sym
*isym
;
2130 unsigned long r_symndx
;
2132 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2133 r_type
= ELF32_R_TYPE (rel
->r_info
);
2134 if (r_symndx
< symtab_hdr
->sh_info
)
2136 /* A local symbol. */
2137 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2148 hh
= (struct elf_metag_link_hash_entry
*)
2149 eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
2150 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
2151 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
2152 hh
= (struct elf_metag_link_hash_entry
*) hh
->eh
.root
.u
.i
.link
;
2154 /* PR15323, ref flags aren't set for references in the same
2156 hh
->eh
.root
.non_ir_ref
= 1;
2159 /* Some relocs require a global offset table. */
2160 if (htab
->sgot
== NULL
)
2164 case R_METAG_TLS_GD
:
2165 case R_METAG_TLS_LDM
:
2166 case R_METAG_TLS_IE
:
2167 if (bfd_link_pic (info
))
2168 info
->flags
|= DF_STATIC_TLS
;
2171 case R_METAG_HI16_GOTOFF
:
2172 case R_METAG_LO16_GOTOFF
:
2173 case R_METAG_GETSET_GOTOFF
:
2174 case R_METAG_GETSET_GOT
:
2175 case R_METAG_HI16_GOTPC
:
2176 case R_METAG_LO16_GOTPC
:
2178 htab
->etab
.dynobj
= dynobj
= abfd
;
2179 if (!elf_metag_create_dynamic_sections (dynobj
, info
))
2190 case R_METAG_TLS_IE
:
2191 case R_METAG_TLS_GD
:
2192 case R_METAG_GETSET_GOT
:
2196 tls_type
= GOT_NORMAL
;
2198 case R_METAG_TLS_IE
:
2199 tls_type
= GOT_TLS_IE
;
2201 case R_METAG_TLS_GD
:
2202 tls_type
= GOT_TLS_GD
;
2208 hh
->eh
.got
.refcount
+= 1;
2209 old_tls_type
= hh
->tls_type
;
2213 bfd_signed_vma
*local_got_refcounts
;
2215 /* This is a global offset table entry for a local
2217 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2218 if (local_got_refcounts
== NULL
)
2222 size
= symtab_hdr
->sh_info
;
2223 size
*= sizeof (bfd_signed_vma
);
2224 /* Add in space to store the local GOT TLS types. */
2225 size
+= symtab_hdr
->sh_info
;
2226 local_got_refcounts
= ((bfd_signed_vma
*)
2227 bfd_zalloc (abfd
, size
));
2228 if (local_got_refcounts
== NULL
)
2230 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2231 memset (metag_elf_local_got_tls_type (abfd
),
2232 GOT_UNKNOWN
, symtab_hdr
->sh_info
);
2234 local_got_refcounts
[r_symndx
] += 1;
2235 old_tls_type
= metag_elf_local_got_tls_type (abfd
) [r_symndx
];
2238 if (old_tls_type
!= tls_type
)
2242 hh
->tls_type
= tls_type
;
2246 metag_elf_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2252 case R_METAG_TLS_LDM
:
2253 metag_link_hash_table (info
)->tls_ldm_got
.refcount
+= 1;
2256 case R_METAG_RELBRANCH_PLT
:
2257 /* This symbol requires a procedure linkage table entry. We
2258 actually build the entry in adjust_dynamic_symbol,
2259 because this might be a case of linking PIC code without
2260 linking in any dynamic objects, in which case we don't
2261 need to generate a procedure linkage table after all. */
2263 /* If this is a local symbol, we resolve it directly without
2264 creating a procedure linkage table entry. */
2268 if (hh
->eh
.forced_local
)
2271 hh
->eh
.needs_plt
= 1;
2272 hh
->eh
.plt
.refcount
+= 1;
2275 case R_METAG_HIADDR16
:
2276 case R_METAG_LOADDR16
:
2277 /* Let's help debug shared library creation. These relocs
2278 cannot be used in shared libs. Don't error out for
2279 sections we don't care about, such as debug sections or
2280 non-constant sections. */
2281 if (bfd_link_pic (info
)
2282 && (sec
->flags
& SEC_ALLOC
) != 0
2283 && (sec
->flags
& SEC_READONLY
) != 0)
2288 name
= hh
->eh
.root
.root
.string
;
2290 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
2292 /* xgettext:c-format */
2293 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2294 abfd
, elf_metag_howto_table
[r_type
].name
, name
);
2295 bfd_set_error (bfd_error_bad_value
);
2300 case R_METAG_ADDR32
:
2301 case R_METAG_RELBRANCH
:
2302 case R_METAG_GETSETOFF
:
2303 if (hh
!= NULL
&& !bfd_link_pic (info
))
2305 hh
->eh
.non_got_ref
= 1;
2306 hh
->eh
.plt
.refcount
+= 1;
2309 /* If we are creating a shared library, and this is a reloc
2310 against a global symbol, or a non PC relative reloc
2311 against a local symbol, then we need to copy the reloc
2312 into the shared library. However, if we are linking with
2313 -Bsymbolic, we do not need to copy a reloc against a
2314 global symbol which is defined in an object we are
2315 including in the link (i.e., DEF_REGULAR is set). At
2316 this point we have not seen all the input files, so it is
2317 possible that DEF_REGULAR is not set now but will be set
2318 later (it is never cleared). We account for that
2319 possibility below by storing information in the
2320 dyn_relocs field of the hash table entry. A similar
2321 situation occurs when creating shared libraries and symbol
2322 visibility changes render the symbol local.
2324 If on the other hand, we are creating an executable, we
2325 may need to keep relocations for symbols satisfied by a
2326 dynamic library if we manage to avoid copy relocs for the
2328 if ((bfd_link_pic (info
)
2329 && (sec
->flags
& SEC_ALLOC
) != 0
2330 && (r_type
!= R_METAG_RELBRANCH
2332 && (! info
->symbolic
2333 || hh
->eh
.root
.type
== bfd_link_hash_defweak
2334 || !hh
->eh
.def_regular
))))
2335 || (!bfd_link_pic (info
)
2336 && (sec
->flags
& SEC_ALLOC
) != 0
2338 && (hh
->eh
.root
.type
== bfd_link_hash_defweak
2339 || !hh
->eh
.def_regular
)))
2341 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2342 struct elf_metag_dyn_reloc_entry
**hdh_head
;
2345 htab
->etab
.dynobj
= dynobj
= abfd
;
2347 /* When creating a shared object, we must copy these
2348 relocs into the output file. We create a reloc
2349 section in dynobj and make room for the reloc. */
2352 sreloc
= _bfd_elf_make_dynamic_reloc_section
2353 (sec
, htab
->etab
.dynobj
, 2, abfd
, /*rela?*/ TRUE
);
2357 bfd_set_error (bfd_error_bad_value
);
2361 elf_section_data (sec
)->sreloc
= sreloc
;
2364 /* If this is a global symbol, we count the number of
2365 relocations we need for this symbol. */
2367 hdh_head
= &((struct elf_metag_link_hash_entry
*) hh
)->dyn_relocs
;
2370 /* Track dynamic relocs needed for local syms too. */
2374 sr
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2378 vpp
= &elf_section_data (sr
)->local_dynrel
;
2379 hdh_head
= (struct elf_metag_dyn_reloc_entry
**) vpp
;
2383 if (hdh_p
== NULL
|| hdh_p
->sec
!= sec
)
2385 hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2386 bfd_alloc (dynobj
, sizeof *hdh_p
));
2389 hdh_p
->hdh_next
= *hdh_head
;
2393 hdh_p
->relative_count
= 0;
2397 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
2398 hdh_p
->relative_count
+= 1;
2402 /* This relocation describes the C++ object vtable hierarchy.
2403 Reconstruct it for later use during GC. */
2404 case R_METAG_GNU_VTINHERIT
:
2405 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, &hh
->eh
,
2410 /* This relocation describes which C++ vtable entries are actually
2411 used. Record for later use during GC. */
2412 case R_METAG_GNU_VTENTRY
:
2413 BFD_ASSERT (hh
!= NULL
);
2415 && !bfd_elf_gc_record_vtentry (abfd
, sec
, &hh
->eh
, rel
->r_addend
))
2424 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2427 elf_metag_copy_indirect_symbol (struct bfd_link_info
*info
,
2428 struct elf_link_hash_entry
*eh_dir
,
2429 struct elf_link_hash_entry
*eh_ind
)
2431 struct elf_metag_link_hash_entry
*hh_dir
, *hh_ind
;
2433 hh_dir
= metag_elf_hash_entry (eh_dir
);
2434 hh_ind
= metag_elf_hash_entry (eh_ind
);
2436 if (hh_ind
->dyn_relocs
!= NULL
)
2438 if (hh_dir
->dyn_relocs
!= NULL
)
2440 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2441 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2443 if (eh_ind
->root
.type
== bfd_link_hash_indirect
)
2446 /* Add reloc counts against the weak sym to the strong sym
2447 list. Merge any entries against the same section. */
2448 for (hdh_pp
= &hh_ind
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2450 struct elf_metag_dyn_reloc_entry
*hdh_q
;
2452 for (hdh_q
= hh_dir
->dyn_relocs
; hdh_q
!= NULL
;
2453 hdh_q
= hdh_q
->hdh_next
)
2454 if (hdh_q
->sec
== hdh_p
->sec
)
2456 hdh_q
->relative_count
+= hdh_p
->relative_count
;
2457 hdh_q
->count
+= hdh_p
->count
;
2458 *hdh_pp
= hdh_p
->hdh_next
;
2462 hdh_pp
= &hdh_p
->hdh_next
;
2464 *hdh_pp
= hh_dir
->dyn_relocs
;
2467 hh_dir
->dyn_relocs
= hh_ind
->dyn_relocs
;
2468 hh_ind
->dyn_relocs
= NULL
;
2471 if (eh_ind
->root
.type
== bfd_link_hash_indirect
2472 && eh_dir
->got
.refcount
<= 0)
2474 hh_dir
->tls_type
= hh_ind
->tls_type
;
2475 hh_ind
->tls_type
= GOT_UNKNOWN
;
2478 _bfd_elf_link_hash_copy_indirect (info
, eh_dir
, eh_ind
);
2481 /* Adjust a symbol defined by a dynamic object and referenced by a
2482 regular object. The current definition is in some section of the
2483 dynamic object, but we're not including those sections. We have to
2484 change the definition to something the rest of the link can
2488 elf_metag_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2489 struct elf_link_hash_entry
*eh
)
2491 struct elf_metag_link_hash_table
*htab
;
2492 struct elf_metag_link_hash_entry
*hh
;
2493 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2496 /* If this is a function, put it in the procedure linkage table. We
2497 will fill in the contents of the procedure linkage table later,
2498 when we know the address of the .got section. */
2499 if (eh
->type
== STT_FUNC
2502 if (eh
->plt
.refcount
<= 0
2503 || SYMBOL_CALLS_LOCAL (info
, eh
)
2504 || (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
2505 && eh
->root
.type
== bfd_link_hash_undefweak
))
2507 /* This case can occur if we saw a PLT reloc in an input
2508 file, but the symbol was never referred to by a dynamic
2509 object. In such a case, we don't actually need to build
2510 a procedure linkage table, and we can just do a PCREL
2512 eh
->plt
.offset
= (bfd_vma
) -1;
2519 eh
->plt
.offset
= (bfd_vma
) -1;
2521 /* If this is a weak symbol, and there is a real definition, the
2522 processor independent code will have arranged for us to see the
2523 real definition first, and we can just use the same value. */
2524 if (eh
->u
.weakdef
!= NULL
)
2526 if (eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defined
2527 && eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defweak
)
2529 eh
->root
.u
.def
.section
= eh
->u
.weakdef
->root
.u
.def
.section
;
2530 eh
->root
.u
.def
.value
= eh
->u
.weakdef
->root
.u
.def
.value
;
2531 eh
->non_got_ref
= eh
->u
.weakdef
->non_got_ref
;
2535 /* This is a reference to a symbol defined by a dynamic object which
2536 is not a function. */
2538 /* If we are creating a shared library, we must presume that the
2539 only references to the symbol are via the global offset table.
2540 For such cases we need not do anything here; the relocations will
2541 be handled correctly by relocate_section. */
2542 if (bfd_link_pic (info
))
2545 /* If there are no references to this symbol that do not use the
2546 GOT, we don't need to generate a copy reloc. */
2547 if (!eh
->non_got_ref
)
2550 /* If -z nocopyreloc was given, we won't generate them either. */
2551 if (info
->nocopyreloc
)
2553 eh
->non_got_ref
= 0;
2557 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2558 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2560 s
= hdh_p
->sec
->output_section
;
2561 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2565 /* If we didn't find any dynamic relocs in read-only sections, then
2566 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2569 eh
->non_got_ref
= 0;
2573 /* We must allocate the symbol in our .dynbss section, which will
2574 become part of the .bss section of the executable. There will be
2575 an entry for this symbol in the .dynsym section. The dynamic
2576 object will contain position independent code, so all references
2577 from the dynamic object to this symbol will go through the global
2578 offset table. The dynamic linker will use the .dynsym entry to
2579 determine the address it must put in the global offset table, so
2580 both the dynamic object and the regular object will refer to the
2581 same memory location for the variable. */
2583 htab
= metag_link_hash_table (info
);
2585 /* We must generate a COPY reloc to tell the dynamic linker to
2586 copy the initial value out of the dynamic object and into the
2587 runtime process image. */
2588 if ((eh
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && eh
->size
!= 0)
2590 htab
->srelbss
->size
+= sizeof (Elf32_External_Rela
);
2596 return _bfd_elf_adjust_dynamic_copy (info
, eh
, s
);
2599 /* Allocate space in .plt, .got and associated reloc sections for
2603 allocate_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2605 struct bfd_link_info
*info
;
2606 struct elf_metag_link_hash_table
*htab
;
2607 struct elf_metag_link_hash_entry
*hh
;
2608 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2610 if (eh
->root
.type
== bfd_link_hash_indirect
)
2613 if (eh
->root
.type
== bfd_link_hash_warning
)
2614 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2617 htab
= metag_link_hash_table (info
);
2619 if (htab
->etab
.dynamic_sections_created
2620 && eh
->plt
.refcount
> 0)
2622 /* Make sure this symbol is output as a dynamic symbol.
2623 Undefined weak syms won't yet be marked as dynamic. */
2624 if (eh
->dynindx
== -1
2625 && !eh
->forced_local
)
2627 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2631 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), eh
))
2633 asection
*s
= htab
->splt
;
2635 /* If this is the first .plt entry, make room for the special
2638 s
->size
+= PLT_ENTRY_SIZE
;
2640 eh
->plt
.offset
= s
->size
;
2642 /* If this symbol is not defined in a regular file, and we are
2643 not generating a shared library, then set the symbol to this
2644 location in the .plt. This is required to make function
2645 pointers compare as equal between the normal executable and
2646 the shared library. */
2647 if (! bfd_link_pic (info
)
2648 && !eh
->def_regular
)
2650 eh
->root
.u
.def
.section
= s
;
2651 eh
->root
.u
.def
.value
= eh
->plt
.offset
;
2654 /* Make room for this entry. */
2655 s
->size
+= PLT_ENTRY_SIZE
;
2657 /* We also need to make an entry in the .got.plt section, which
2658 will be placed in the .got section by the linker script. */
2659 htab
->sgotplt
->size
+= 4;
2661 /* We also need to make an entry in the .rel.plt section. */
2662 htab
->srelplt
->size
+= sizeof (Elf32_External_Rela
);
2666 eh
->plt
.offset
= (bfd_vma
) -1;
2672 eh
->plt
.offset
= (bfd_vma
) -1;
2676 if (eh
->got
.refcount
> 0)
2680 int tls_type
= metag_elf_hash_entry (eh
)->tls_type
;
2682 /* Make sure this symbol is output as a dynamic symbol.
2683 Undefined weak syms won't yet be marked as dynamic. */
2684 if (eh
->dynindx
== -1
2685 && !eh
->forced_local
)
2687 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2693 eh
->got
.offset
= s
->size
;
2695 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2696 if (tls_type
== GOT_TLS_GD
)
2698 dyn
= htab
->etab
.dynamic_sections_created
;
2699 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2700 R_METAG_TLS_GD needs one if local symbol and two if global. */
2701 if ((tls_type
== GOT_TLS_GD
&& eh
->dynindx
== -1)
2702 || (tls_type
== GOT_TLS_IE
&& dyn
))
2703 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2704 else if (tls_type
== GOT_TLS_GD
)
2705 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rela
);
2706 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2707 bfd_link_pic (info
),
2709 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2712 eh
->got
.offset
= (bfd_vma
) -1;
2714 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2715 if (hh
->dyn_relocs
== NULL
)
2718 /* If this is a -Bsymbolic shared link, then we need to discard all
2719 space allocated for dynamic pc-relative relocs against symbols
2720 defined in a regular object. For the normal shared case, discard
2721 space for relocs that have become local due to symbol visibility
2723 if (bfd_link_pic (info
))
2725 if (SYMBOL_CALLS_LOCAL (info
, eh
))
2727 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2729 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2731 hdh_p
->count
-= hdh_p
->relative_count
;
2732 hdh_p
->relative_count
= 0;
2733 if (hdh_p
->count
== 0)
2734 *hdh_pp
= hdh_p
->hdh_next
;
2736 hdh_pp
= &hdh_p
->hdh_next
;
2740 /* Also discard relocs on undefined weak syms with non-default
2742 if (hh
->dyn_relocs
!= NULL
2743 && eh
->root
.type
== bfd_link_hash_undefweak
)
2745 if (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
)
2746 hh
->dyn_relocs
= NULL
;
2748 /* Make sure undefined weak symbols are output as a dynamic
2750 else if (eh
->dynindx
== -1
2751 && !eh
->forced_local
)
2753 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2760 /* For the non-shared case, discard space for relocs against
2761 symbols which turn out to need copy relocs or are not
2763 if (!eh
->non_got_ref
2764 && ((eh
->def_dynamic
2765 && !eh
->def_regular
)
2766 || (htab
->etab
.dynamic_sections_created
2767 && (eh
->root
.type
== bfd_link_hash_undefweak
2768 || eh
->root
.type
== bfd_link_hash_undefined
))))
2770 /* Make sure this symbol is output as a dynamic symbol.
2771 Undefined weak syms won't yet be marked as dynamic. */
2772 if (eh
->dynindx
== -1
2773 && !eh
->forced_local
)
2775 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2779 /* If that succeeded, we know we'll be keeping all the
2781 if (eh
->dynindx
!= -1)
2785 hh
->dyn_relocs
= NULL
;
2791 /* Finally, allocate space. */
2792 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2794 asection
*sreloc
= elf_section_data (hdh_p
->sec
)->sreloc
;
2795 sreloc
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2801 /* Find any dynamic relocs that apply to read-only sections. */
2804 readonly_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2806 struct elf_metag_link_hash_entry
*hh
;
2807 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2809 if (eh
->root
.type
== bfd_link_hash_warning
)
2810 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2812 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2813 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2815 asection
*s
= hdh_p
->sec
->output_section
;
2817 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2819 struct bfd_link_info
*info
= inf
;
2821 info
->flags
|= DF_TEXTREL
;
2823 /* Not an error, just cut short the traversal. */
2830 /* Set the sizes of the dynamic sections. */
2833 elf_metag_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2834 struct bfd_link_info
*info
)
2836 struct elf_metag_link_hash_table
*htab
;
2842 htab
= metag_link_hash_table (info
);
2843 dynobj
= htab
->etab
.dynobj
;
2847 if (htab
->etab
.dynamic_sections_created
)
2849 /* Set the contents of the .interp section to the interpreter. */
2850 if (bfd_link_executable (info
) && !info
->nointerp
)
2852 s
= bfd_get_linker_section (dynobj
, ".interp");
2855 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2856 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2860 /* Set up .got offsets for local syms, and space for local dynamic
2862 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2864 bfd_signed_vma
*local_got
;
2865 bfd_signed_vma
*end_local_got
;
2866 bfd_size_type locsymcount
;
2867 Elf_Internal_Shdr
*symtab_hdr
;
2869 char *local_tls_type
;
2871 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2874 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2876 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2878 for (hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2879 elf_section_data (s
)->local_dynrel
);
2881 hdh_p
= hdh_p
->hdh_next
)
2883 if (!bfd_is_abs_section (hdh_p
->sec
)
2884 && bfd_is_abs_section (hdh_p
->sec
->output_section
))
2886 /* Input section has been discarded, either because
2887 it is a copy of a linkonce section or due to
2888 linker script /DISCARD/, so we'll be discarding
2891 else if (hdh_p
->count
!= 0)
2893 srel
= elf_section_data (hdh_p
->sec
)->sreloc
;
2894 srel
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2895 if ((hdh_p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2896 info
->flags
|= DF_TEXTREL
;
2901 local_got
= elf_local_got_refcounts (ibfd
);
2905 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2906 locsymcount
= symtab_hdr
->sh_info
;
2907 end_local_got
= local_got
+ locsymcount
;
2908 local_tls_type
= metag_elf_local_got_tls_type (ibfd
);
2910 srel
= htab
->srelgot
;
2911 for (; local_got
< end_local_got
; ++local_got
)
2915 *local_got
= s
->size
;
2916 s
->size
+= GOT_ENTRY_SIZE
;
2917 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2918 if (*local_tls_type
== GOT_TLS_GD
)
2920 if (bfd_link_pic (info
))
2921 srel
->size
+= sizeof (Elf32_External_Rela
);
2924 *local_got
= (bfd_vma
) -1;
2929 if (htab
->tls_ldm_got
.refcount
> 0)
2931 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2933 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2934 htab
->sgot
->size
+= 8;
2935 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2938 htab
->tls_ldm_got
.offset
= -1;
2940 /* Allocate global sym .plt and .got entries, and space for global
2941 sym dynamic relocs. */
2942 elf_link_hash_traverse (&htab
->etab
, allocate_dynrelocs
, info
);
2944 /* We now have determined the sizes of the various dynamic sections.
2945 Allocate memory for them. */
2947 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2949 bfd_boolean reloc_section
= FALSE
;
2951 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2956 || s
== htab
->sgotplt
2957 || s
== htab
->sdynbss
)
2959 /* Strip this section if we don't need it; see the
2962 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2964 if (s
->size
!= 0 && s
!= htab
->srelplt
)
2967 /* We use the reloc_count field as a counter if we need
2968 to copy relocs into the output file. */
2970 reloc_section
= TRUE
;
2974 /* It's not one of our sections, so don't allocate space. */
2980 /* If we don't need this section, strip it from the
2981 output file. This is mostly to handle .rela.bss and
2982 .rela.plt. We must create both sections in
2983 create_dynamic_sections, because they must be created
2984 before the linker maps input sections to output
2985 sections. The linker does that before
2986 adjust_dynamic_symbol is called, and it is that
2987 function which decides whether anything needs to go
2988 into these sections. */
2989 s
->flags
|= SEC_EXCLUDE
;
2993 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2996 /* Allocate memory for the section contents. */
2997 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2998 if (s
->contents
== NULL
)
3000 else if (reloc_section
)
3002 unsigned char *contents
= s
->contents
;
3003 Elf32_External_Rela reloc
;
3005 /* Fill the reloc section with a R_METAG_NONE type reloc. */
3006 memset(&reloc
, 0, sizeof(Elf32_External_Rela
));
3007 reloc
.r_info
[0] = R_METAG_NONE
;
3008 for (; contents
< (s
->contents
+ s
->size
);
3009 contents
+= sizeof(Elf32_External_Rela
))
3011 memcpy(contents
, &reloc
, sizeof(Elf32_External_Rela
));
3016 if (htab
->etab
.dynamic_sections_created
)
3018 /* Add some entries to the .dynamic section. We fill in the
3019 values later, in elf_metag_finish_dynamic_sections, but we
3020 must add the entries now so that we get the correct size for
3021 the .dynamic section. The DT_DEBUG entry is filled in by the
3022 dynamic linker and used by the debugger. */
3023 #define add_dynamic_entry(TAG, VAL) \
3024 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3026 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3029 if (bfd_link_executable (info
))
3031 if (!add_dynamic_entry (DT_DEBUG
, 0))
3035 if (htab
->srelplt
->size
!= 0)
3037 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3038 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3039 || !add_dynamic_entry (DT_JMPREL
, 0))
3045 if (!add_dynamic_entry (DT_RELA
, 0)
3046 || !add_dynamic_entry (DT_RELASZ
, 0)
3047 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3050 /* If any dynamic relocs apply to a read-only section,
3051 then we need a DT_TEXTREL entry. */
3052 if ((info
->flags
& DF_TEXTREL
) == 0)
3053 elf_link_hash_traverse (&htab
->etab
, readonly_dynrelocs
, info
);
3055 if ((info
->flags
& DF_TEXTREL
) != 0)
3057 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3062 #undef add_dynamic_entry
3067 /* Finish up dynamic symbol handling. We set the contents of various
3068 dynamic sections here. */
3071 elf_metag_finish_dynamic_symbol (bfd
*output_bfd
,
3072 struct bfd_link_info
*info
,
3073 struct elf_link_hash_entry
*eh
,
3074 Elf_Internal_Sym
*sym
)
3076 struct elf_metag_link_hash_table
*htab
;
3077 Elf_Internal_Rela rel
;
3080 htab
= metag_link_hash_table (info
);
3082 if (eh
->plt
.offset
!= (bfd_vma
) -1)
3092 if (eh
->plt
.offset
& 1)
3095 BFD_ASSERT (eh
->dynindx
!= -1);
3098 sgot
= htab
->sgotplt
;
3099 srela
= htab
->srelplt
;
3100 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
3102 /* Get the index in the procedure linkage table which
3103 corresponds to this symbol. This is the index of this symbol
3104 in all the symbols for which we are making plt entries. The
3105 first entry in the procedure linkage table is reserved. */
3106 plt_index
= eh
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3108 /* Get the offset into the .got.plt table of the entry that
3109 corresponds to this function. */
3110 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3112 BFD_ASSERT (got_offset
< (1 << 16));
3114 got_entry
= sgot
->output_section
->vma
3115 + sgot
->output_offset
3118 BFD_ASSERT (plt_index
< (1 << 16));
3120 /* Fill in the entry in the procedure linkage table. */
3121 if (! bfd_link_pic (info
))
3123 bfd_put_32 (output_bfd
,
3125 | (((got_entry
>> 16) & 0xffff) << 3)),
3126 splt
->contents
+ eh
->plt
.offset
);
3127 bfd_put_32 (output_bfd
,
3129 | ((got_entry
& 0xffff) << 3)),
3130 splt
->contents
+ eh
->plt
.offset
+ 4);
3131 bfd_put_32 (output_bfd
, plt_entry
[2],
3132 splt
->contents
+ eh
->plt
.offset
+ 8);
3133 bfd_put_32 (output_bfd
,
3134 (plt_entry
[3] | (plt_index
<< 3)),
3135 splt
->contents
+ eh
->plt
.offset
+ 12);
3136 bfd_put_32 (output_bfd
,
3138 | ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3139 splt
->contents
+ eh
->plt
.offset
+ 16);
3143 bfd_vma addr
= got_entry
- (splt
->output_section
->vma
+
3144 splt
->output_offset
+ eh
->plt
.offset
);
3146 bfd_put_32 (output_bfd
,
3147 plt_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3148 splt
->contents
+ eh
->plt
.offset
);
3149 bfd_put_32 (output_bfd
,
3150 plt_pic_entry
[1] | ((addr
& 0xffff) << 3),
3151 splt
->contents
+ eh
->plt
.offset
+ 4);
3152 bfd_put_32 (output_bfd
, plt_pic_entry
[2],
3153 splt
->contents
+ eh
->plt
.offset
+ 8);
3154 bfd_put_32 (output_bfd
,
3155 (plt_pic_entry
[3] | (plt_index
<< 3)),
3156 splt
->contents
+ eh
->plt
.offset
+ 12);
3157 bfd_put_32 (output_bfd
,
3159 + ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3160 splt
->contents
+ eh
->plt
.offset
+ 16);
3163 /* Fill in the entry in the global offset table. */
3164 bfd_put_32 (output_bfd
,
3165 (splt
->output_section
->vma
3166 + splt
->output_offset
3168 + 12), /* offset within PLT entry */
3169 sgot
->contents
+ got_offset
);
3171 /* Fill in the entry in the .rela.plt section. */
3172 rel
.r_offset
= (sgot
->output_section
->vma
3173 + sgot
->output_offset
3175 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_JMP_SLOT
);
3177 loc
= htab
->srelplt
->contents
;
3178 loc
+= plt_index
* sizeof(Elf32_External_Rela
);
3179 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3181 if (!eh
->def_regular
)
3183 /* Mark the symbol as undefined, rather than as defined in
3184 the .plt section. Leave the value alone. */
3185 sym
->st_shndx
= SHN_UNDEF
;
3189 if (eh
->got
.offset
!= (bfd_vma
) -1
3190 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_GD
) == 0
3191 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_IE
) == 0)
3193 /* This symbol has an entry in the global offset table. Set it
3196 rel
.r_offset
= ((eh
->got
.offset
&~ (bfd_vma
) 1)
3197 + htab
->sgot
->output_offset
3198 + htab
->sgot
->output_section
->vma
);
3200 /* If this is a -Bsymbolic link and the symbol is defined
3201 locally or was forced to be local because of a version file,
3202 we just want to emit a RELATIVE reloc. The entry in the
3203 global offset table will already have been initialized in the
3204 relocate_section function. */
3205 if (bfd_link_pic (info
)
3206 && (info
->symbolic
|| eh
->dynindx
== -1)
3209 rel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
3210 rel
.r_addend
= (eh
->root
.u
.def
.value
3211 + eh
->root
.u
.def
.section
->output_offset
3212 + eh
->root
.u
.def
.section
->output_section
->vma
);
3216 if ((eh
->got
.offset
& 1) != 0)
3218 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ eh
->got
.offset
);
3219 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_GLOB_DAT
);
3223 loc
= htab
->srelgot
->contents
;
3224 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3225 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3232 /* This symbol needs a copy reloc. Set it up. */
3234 if (! (eh
->dynindx
!= -1
3235 && (eh
->root
.type
== bfd_link_hash_defined
3236 || eh
->root
.type
== bfd_link_hash_defweak
)))
3241 rel
.r_offset
= (eh
->root
.u
.def
.value
3242 + eh
->root
.u
.def
.section
->output_offset
3243 + eh
->root
.u
.def
.section
->output_section
->vma
);
3245 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_COPY
);
3246 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3247 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3250 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3251 if (eh
->root
.root
.string
[0] == '_'
3252 && (strcmp (eh
->root
.root
.string
, "_DYNAMIC") == 0
3253 || eh
== htab
->etab
.hgot
))
3255 sym
->st_shndx
= SHN_ABS
;
3261 /* Set the Meta ELF ABI version. */
3264 elf_metag_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info
)
3266 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
3268 _bfd_elf_post_process_headers (abfd
, link_info
);
3269 i_ehdrp
= elf_elfheader (abfd
);
3270 i_ehdrp
->e_ident
[EI_ABIVERSION
] = METAG_ELF_ABI_VERSION
;
3273 /* Used to decide how to sort relocs in an optimal manner for the
3274 dynamic linker, before writing them out. */
3276 static enum elf_reloc_type_class
3277 elf_metag_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3278 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3279 const Elf_Internal_Rela
*rela
)
3281 switch ((int) ELF32_R_TYPE (rela
->r_info
))
3283 case R_METAG_RELATIVE
:
3284 return reloc_class_relative
;
3285 case R_METAG_JMP_SLOT
:
3286 return reloc_class_plt
;
3288 return reloc_class_copy
;
3290 return reloc_class_normal
;
3294 /* Finish up the dynamic sections. */
3297 elf_metag_finish_dynamic_sections (bfd
*output_bfd
,
3298 struct bfd_link_info
*info
)
3301 struct elf_metag_link_hash_table
*htab
;
3304 htab
= metag_link_hash_table (info
);
3305 dynobj
= htab
->etab
.dynobj
;
3307 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3309 if (htab
->etab
.dynamic_sections_created
)
3312 Elf32_External_Dyn
*dyncon
, *dynconend
;
3317 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3318 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3319 for (; dyncon
< dynconend
; dyncon
++)
3321 Elf_Internal_Dyn dyn
;
3324 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3333 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3334 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3339 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3340 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3345 dyn
.d_un
.d_val
= s
->size
;
3346 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3350 /* Don't count procedure linkage table relocs in the
3351 overall reloc count. */
3352 if (htab
->srelplt
) {
3354 dyn
.d_un
.d_val
-= s
->size
;
3356 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3360 /* We may not be using the standard ELF linker script.
3361 If .rela.plt is the first .rela section, we adjust
3362 DT_RELA to not include it. */
3363 if (htab
->srelplt
) {
3365 if (dyn
.d_un
.d_ptr
== s
->output_section
->vma
+ s
->output_offset
)
3366 dyn
.d_un
.d_ptr
+= s
->size
;
3368 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3374 /* Fill in the first entry in the procedure linkage table. */
3376 if (splt
&& splt
->size
> 0)
3379 /* addr = .got + 4 */
3380 addr
= htab
->sgot
->output_section
->vma
+
3381 htab
->sgot
->output_offset
+ 4;
3382 if (bfd_link_pic (info
))
3384 addr
-= splt
->output_section
->vma
+ splt
->output_offset
;
3385 bfd_put_32 (output_bfd
,
3386 plt0_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3388 bfd_put_32 (output_bfd
,
3389 plt0_pic_entry
[1] | ((addr
& 0xffff) << 3),
3390 splt
->contents
+ 4);
3391 bfd_put_32 (output_bfd
, plt0_pic_entry
[2], splt
->contents
+ 8);
3392 bfd_put_32 (output_bfd
, plt0_pic_entry
[3], splt
->contents
+ 12);
3393 bfd_put_32 (output_bfd
, plt0_pic_entry
[4], splt
->contents
+ 16);
3397 bfd_put_32 (output_bfd
,
3398 plt0_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3400 bfd_put_32 (output_bfd
,
3401 plt0_entry
[1] | ((addr
& 0xffff) << 3),
3402 splt
->contents
+ 4);
3403 bfd_put_32 (output_bfd
, plt0_entry
[2], splt
->contents
+ 8);
3404 bfd_put_32 (output_bfd
, plt0_entry
[3], splt
->contents
+ 12);
3405 bfd_put_32 (output_bfd
, plt0_entry
[4], splt
->contents
+ 16);
3408 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
=
3413 if (htab
->sgot
!= NULL
&& htab
->sgot
->size
!= 0)
3415 /* Fill in the first entry in the global offset table.
3416 We use it to point to our dynamic section, if we have one. */
3417 bfd_put_32 (output_bfd
,
3418 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0,
3419 htab
->sgot
->contents
);
3421 /* The second entry is reserved for use by the dynamic linker. */
3422 memset (htab
->sgot
->contents
+ GOT_ENTRY_SIZE
, 0, GOT_ENTRY_SIZE
);
3424 /* Set .got entry size. */
3425 elf_section_data (htab
->sgot
->output_section
)
3426 ->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3432 /* Return the section that should be marked against GC for a given
3436 elf_metag_gc_mark_hook (asection
*sec
,
3437 struct bfd_link_info
*info
,
3438 Elf_Internal_Rela
*rela
,
3439 struct elf_link_hash_entry
*hh
,
3440 Elf_Internal_Sym
*sym
)
3443 switch ((unsigned int) ELF32_R_TYPE (rela
->r_info
))
3445 case R_METAG_GNU_VTINHERIT
:
3446 case R_METAG_GNU_VTENTRY
:
3450 return _bfd_elf_gc_mark_hook (sec
, info
, rela
, hh
, sym
);
3453 /* Update the got and plt entry reference counts for the section being
3457 elf_metag_gc_sweep_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
3458 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3459 asection
*sec ATTRIBUTE_UNUSED
,
3460 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
3462 Elf_Internal_Shdr
*symtab_hdr
;
3463 struct elf_link_hash_entry
**eh_syms
;
3464 bfd_signed_vma
*local_got_refcounts
;
3465 bfd_signed_vma
*local_plt_refcounts
;
3466 const Elf_Internal_Rela
*rel
, *relend
;
3468 if (bfd_link_relocatable (info
))
3471 elf_section_data (sec
)->local_dynrel
= NULL
;
3473 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3474 eh_syms
= elf_sym_hashes (abfd
);
3475 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3476 local_plt_refcounts
= local_got_refcounts
;
3477 if (local_plt_refcounts
!= NULL
)
3478 local_plt_refcounts
+= symtab_hdr
->sh_info
;
3480 relend
= relocs
+ sec
->reloc_count
;
3481 for (rel
= relocs
; rel
< relend
; rel
++)
3483 unsigned long r_symndx
;
3484 unsigned int r_type
;
3485 struct elf_link_hash_entry
*eh
= NULL
;
3487 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3488 if (r_symndx
>= symtab_hdr
->sh_info
)
3490 struct elf_metag_link_hash_entry
*hh
;
3491 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3492 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3494 eh
= eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
3495 while (eh
->root
.type
== bfd_link_hash_indirect
3496 || eh
->root
.type
== bfd_link_hash_warning
)
3497 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
3498 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3500 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3501 hdh_pp
= &hdh_p
->hdh_next
)
3502 if (hdh_p
->sec
== sec
)
3504 /* Everything must go for SEC. */
3505 *hdh_pp
= hdh_p
->hdh_next
;
3510 r_type
= ELF32_R_TYPE (rel
->r_info
);
3513 case R_METAG_TLS_LDM
:
3514 if (metag_link_hash_table (info
)->tls_ldm_got
.refcount
> 0)
3515 metag_link_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
3517 case R_METAG_TLS_IE
:
3518 case R_METAG_TLS_GD
:
3519 case R_METAG_GETSET_GOT
:
3522 if (eh
->got
.refcount
> 0)
3523 eh
->got
.refcount
-= 1;
3525 else if (local_got_refcounts
!= NULL
)
3527 if (local_got_refcounts
[r_symndx
] > 0)
3528 local_got_refcounts
[r_symndx
] -= 1;
3532 case R_METAG_RELBRANCH_PLT
:
3535 if (eh
->plt
.refcount
> 0)
3536 eh
->plt
.refcount
-= 1;
3540 case R_METAG_ADDR32
:
3541 case R_METAG_HIADDR16
:
3542 case R_METAG_LOADDR16
:
3543 case R_METAG_GETSETOFF
:
3544 case R_METAG_RELBRANCH
:
3547 struct elf_metag_link_hash_entry
*hh
;
3548 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3549 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3551 if (!bfd_link_pic (info
) && eh
->plt
.refcount
> 0)
3552 eh
->plt
.refcount
-= 1;
3554 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3556 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3557 hdh_pp
= &hdh_p
->hdh_next
)
3558 if (hdh_p
->sec
== sec
)
3560 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
3561 hdh_p
->relative_count
-= 1;
3563 if (hdh_p
->count
== 0)
3564 *hdh_pp
= hdh_p
->hdh_next
;
3578 /* Determine the type of stub needed, if any, for a call. */
3580 static enum elf_metag_stub_type
3581 metag_type_of_stub (asection
*input_sec
,
3582 const Elf_Internal_Rela
*rel
,
3583 struct elf_metag_link_hash_entry
*hh
,
3584 bfd_vma destination
,
3585 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3588 bfd_vma branch_offset
;
3589 bfd_vma max_branch_offset
;
3592 !(hh
->eh
.root
.type
== bfd_link_hash_defined
3593 || hh
->eh
.root
.type
== bfd_link_hash_defweak
))
3594 return metag_stub_none
;
3596 /* Determine where the call point is. */
3597 location
= (input_sec
->output_offset
3598 + input_sec
->output_section
->vma
3601 branch_offset
= destination
- location
;
3603 /* Determine if a long branch stub is needed. Meta branch offsets
3604 are signed 19 bits 4 byte aligned. */
3605 max_branch_offset
= (1 << (BRANCH_BITS
-1)) << 2;
3607 if (branch_offset
+ max_branch_offset
>= 2*max_branch_offset
)
3609 if (bfd_link_pic (info
))
3610 return metag_stub_long_branch_shared
;
3612 return metag_stub_long_branch
;
3615 return metag_stub_none
;
3618 #define MOVT_A0_3 0x82180005
3619 #define JUMP_A0_3 0xac180003
3621 #define MOVT_A1LBP 0x83080005
3622 #define ADD_A1LBP 0x83080000
3624 #define ADDT_A0_3_CPC 0x82980001
3625 #define ADD_A0_3_A0_3 0x82180000
3626 #define MOV_PC_A0_3 0xa3180ca0
3629 metag_build_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3631 struct elf_metag_stub_hash_entry
*hsh
;
3638 /* Massage our args to the form they really have. */
3639 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3641 stub_sec
= hsh
->stub_sec
;
3643 /* Make a note of the offset within the stubs for this entry. */
3644 hsh
->stub_offset
= stub_sec
->size
;
3645 loc
= stub_sec
->contents
+ hsh
->stub_offset
;
3647 stub_bfd
= stub_sec
->owner
;
3649 switch (hsh
->stub_type
)
3651 case metag_stub_long_branch_shared
:
3652 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3653 calculate the jump target using A0.3 as a temporary. Then a MOV
3654 to PC carries out the jump. */
3655 sym_value
= (hsh
->target_value
3656 + hsh
->target_section
->output_offset
3657 + hsh
->target_section
->output_section
->vma
3660 sym_value
-= (hsh
->stub_offset
3661 + stub_sec
->output_offset
3662 + stub_sec
->output_section
->vma
);
3664 bfd_put_32 (stub_bfd
, ADDT_A0_3_CPC
| (((sym_value
>> 16) & 0xffff) << 3),
3667 bfd_put_32 (stub_bfd
, ADD_A0_3_A0_3
| ((sym_value
& 0xffff) << 3),
3670 bfd_put_32 (stub_bfd
, MOV_PC_A0_3
, loc
+ 8);
3674 case metag_stub_long_branch
:
3675 /* A standard long branch stub is a MOVT instruction followed by a
3676 JUMP instruction using the A0.3 register as a temporary. This is
3677 the same method used by the LDLK linker (patch.c). */
3678 sym_value
= (hsh
->target_value
3679 + hsh
->target_section
->output_offset
3680 + hsh
->target_section
->output_section
->vma
3683 bfd_put_32 (stub_bfd
, MOVT_A0_3
| (((sym_value
>> 16) & 0xffff) << 3),
3686 bfd_put_32 (stub_bfd
, JUMP_A0_3
| ((sym_value
& 0xffff) << 3), loc
+ 4);
3695 stub_sec
->size
+= size
;
3699 /* As above, but don't actually build the stub. Just bump offset so
3700 we know stub section sizes. */
3703 metag_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3705 struct elf_metag_stub_hash_entry
*hsh
;
3708 /* Massage our args to the form they really have. */
3709 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3711 if (hsh
->stub_type
== metag_stub_long_branch
)
3713 else if (hsh
->stub_type
== metag_stub_long_branch_shared
)
3716 hsh
->stub_sec
->size
+= size
;
3720 /* Set up various things so that we can make a list of input sections
3721 for each output section included in the link. Returns -1 on error,
3722 0 when no stubs will be needed, and 1 on success. */
3725 elf_metag_setup_section_lists (bfd
*output_bfd
, struct bfd_link_info
*info
)
3728 unsigned int bfd_count
;
3729 unsigned int top_id
, top_index
;
3731 asection
**input_list
, **list
;
3733 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3735 /* Count the number of input BFDs and find the top input section id. */
3736 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3738 input_bfd
= input_bfd
->link
.next
)
3741 for (section
= input_bfd
->sections
;
3743 section
= section
->next
)
3745 if (top_id
< section
->id
)
3746 top_id
= section
->id
;
3750 htab
->bfd_count
= bfd_count
;
3752 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3753 htab
->stub_group
= bfd_zmalloc (amt
);
3754 if (htab
->stub_group
== NULL
)
3757 /* We can't use output_bfd->section_count here to find the top output
3758 section index as some sections may have been removed, and
3759 strip_excluded_output_sections doesn't renumber the indices. */
3760 for (section
= output_bfd
->sections
, top_index
= 0;
3762 section
= section
->next
)
3764 if (top_index
< section
->index
)
3765 top_index
= section
->index
;
3768 htab
->top_index
= top_index
;
3769 amt
= sizeof (asection
*) * (top_index
+ 1);
3770 input_list
= bfd_malloc (amt
);
3771 htab
->input_list
= input_list
;
3772 if (input_list
== NULL
)
3775 /* For sections we aren't interested in, mark their entries with a
3776 value we can check later. */
3777 list
= input_list
+ top_index
;
3779 *list
= bfd_abs_section_ptr
;
3780 while (list
-- != input_list
);
3782 for (section
= output_bfd
->sections
;
3784 section
= section
->next
)
3786 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3787 * have PC relative relocs in them but no code flag set. */
3788 if (((section
->flags
& SEC_CODE
) != 0) ||
3789 strcmp(".ctors", section
->name
) ||
3790 strcmp(".dtors", section
->name
))
3791 input_list
[section
->index
] = NULL
;
3797 /* The linker repeatedly calls this function for each input section,
3798 in the order that input sections are linked into output sections.
3799 Build lists of input sections to determine groupings between which
3800 we may insert linker stubs. */
3803 elf_metag_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3805 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3807 if (isec
->output_section
->index
<= htab
->top_index
)
3809 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3810 if (*list
!= bfd_abs_section_ptr
)
3812 /* Steal the link_sec pointer for our list. */
3813 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3814 /* This happens to make the list in reverse order,
3815 which is what we want. */
3816 PREV_SEC (isec
) = *list
;
3822 /* See whether we can group stub sections together. Grouping stub
3823 sections may result in fewer stubs. More importantly, we need to
3824 put all .init* and .fini* stubs at the beginning of the .init or
3825 .fini output sections respectively, because glibc splits the
3826 _init and _fini functions into multiple parts. Putting a stub in
3827 the middle of a function is not a good idea. */
3830 group_sections (struct elf_metag_link_hash_table
*htab
,
3831 bfd_size_type stub_group_size
,
3832 bfd_boolean stubs_always_before_branch
)
3834 asection
**list
= htab
->input_list
+ htab
->top_index
;
3837 asection
*tail
= *list
;
3838 if (tail
== bfd_abs_section_ptr
)
3840 while (tail
!= NULL
)
3844 bfd_size_type total
;
3845 bfd_boolean big_sec
;
3849 big_sec
= total
>= stub_group_size
;
3851 while ((prev
= PREV_SEC (curr
)) != NULL
3852 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3856 /* OK, the size from the start of CURR to the end is less
3857 than stub_group_size bytes and thus can be handled by one stub
3858 section. (or the tail section is itself larger than
3859 stub_group_size bytes, in which case we may be toast.)
3860 We should really be keeping track of the total size of
3861 stubs added here, as stubs contribute to the final output
3865 prev
= PREV_SEC (tail
);
3866 /* Set up this stub group. */
3867 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3869 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3871 /* But wait, there's more! Input sections up to stub_group_size
3872 bytes before the stub section can be handled by it too.
3873 Don't do this if we have a really large section after the
3874 stubs, as adding more stubs increases the chance that
3875 branches may not reach into the stub section. */
3876 if (!stubs_always_before_branch
&& !big_sec
)
3880 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3884 prev
= PREV_SEC (tail
);
3885 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3891 while (list
-- != htab
->input_list
);
3892 free (htab
->input_list
);
3896 /* Read in all local syms for all input bfds.
3897 Returns -1 on error, 0 otherwise. */
3900 get_local_syms (bfd
*output_bfd ATTRIBUTE_UNUSED
, bfd
*input_bfd
,
3901 struct bfd_link_info
*info
)
3903 unsigned int bfd_indx
;
3904 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
3905 int stub_changed
= 0;
3906 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3908 /* We want to read in symbol extension records only once. To do this
3909 we need to read in the local symbols in parallel and save them for
3910 later use; so hold pointers to the local symbols in an array. */
3911 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
3912 all_local_syms
= bfd_zmalloc (amt
);
3913 htab
->all_local_syms
= all_local_syms
;
3914 if (all_local_syms
== NULL
)
3917 /* Walk over all the input BFDs, swapping in local symbols. */
3920 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3922 Elf_Internal_Shdr
*symtab_hdr
;
3924 /* We'll need the symbol table in a second. */
3925 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3926 if (symtab_hdr
->sh_info
== 0)
3929 /* We need an array of the local symbols attached to the input bfd. */
3930 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3931 if (local_syms
== NULL
)
3933 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
3934 symtab_hdr
->sh_info
, 0,
3936 /* Cache them for elf_link_input_bfd. */
3937 symtab_hdr
->contents
= (unsigned char *) local_syms
;
3939 if (local_syms
== NULL
)
3942 all_local_syms
[bfd_indx
] = local_syms
;
3945 return stub_changed
;
3948 /* Determine and set the size of the stub section for a final link.
3950 The basic idea here is to examine all the relocations looking for
3951 PC-relative calls to a target that is unreachable with a "CALLR"
3954 /* See elf32-hppa.c and elf64-ppc.c. */
3957 elf_metag_size_stubs(bfd
*output_bfd
, bfd
*stub_bfd
,
3958 struct bfd_link_info
*info
,
3959 bfd_signed_vma group_size
,
3960 asection
* (*add_stub_section
) (const char *, asection
*),
3961 void (*layout_sections_again
) (void))
3963 bfd_size_type stub_group_size
;
3964 bfd_boolean stubs_always_before_branch
;
3965 bfd_boolean stub_changed
;
3966 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3968 /* Stash our params away. */
3969 htab
->stub_bfd
= stub_bfd
;
3970 htab
->add_stub_section
= add_stub_section
;
3971 htab
->layout_sections_again
= layout_sections_again
;
3972 stubs_always_before_branch
= group_size
< 0;
3974 stub_group_size
= -group_size
;
3976 stub_group_size
= group_size
;
3977 if (stub_group_size
== 1)
3979 /* Default values. */
3980 /* FIXME: not sure what these values should be */
3981 if (stubs_always_before_branch
)
3983 stub_group_size
= (1 << BRANCH_BITS
);
3987 stub_group_size
= (1 << BRANCH_BITS
);
3991 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3993 switch (get_local_syms (output_bfd
, info
->input_bfds
, info
))
3996 if (htab
->all_local_syms
)
3997 goto error_ret_free_local
;
4001 stub_changed
= FALSE
;
4005 stub_changed
= TRUE
;
4012 unsigned int bfd_indx
;
4015 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4017 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
4019 Elf_Internal_Shdr
*symtab_hdr
;
4021 Elf_Internal_Sym
*local_syms
;
4023 /* We'll need the symbol table in a second. */
4024 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4025 if (symtab_hdr
->sh_info
== 0)
4028 local_syms
= htab
->all_local_syms
[bfd_indx
];
4030 /* Walk over each section attached to the input bfd. */
4031 for (section
= input_bfd
->sections
;
4033 section
= section
->next
)
4035 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4037 /* If there aren't any relocs, then there's nothing more
4039 if ((section
->flags
& SEC_RELOC
) == 0
4040 || section
->reloc_count
== 0)
4043 /* If this section is a link-once section that will be
4044 discarded, then don't create any stubs. */
4045 if (section
->output_section
== NULL
4046 || section
->output_section
->owner
!= output_bfd
)
4049 /* Get the relocs. */
4051 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
, NULL
,
4053 if (internal_relocs
== NULL
)
4054 goto error_ret_free_local
;
4056 /* Now examine each relocation. */
4057 irela
= internal_relocs
;
4058 irelaend
= irela
+ section
->reloc_count
;
4059 for (; irela
< irelaend
; irela
++)
4061 unsigned int r_type
, r_indx
;
4062 enum elf_metag_stub_type stub_type
;
4063 struct elf_metag_stub_hash_entry
*hsh
;
4066 bfd_vma destination
;
4067 struct elf_metag_link_hash_entry
*hh
;
4069 const asection
*id_sec
;
4071 r_type
= ELF32_R_TYPE (irela
->r_info
);
4072 r_indx
= ELF32_R_SYM (irela
->r_info
);
4074 if (r_type
>= (unsigned int) R_METAG_MAX
)
4076 bfd_set_error (bfd_error_bad_value
);
4077 error_ret_free_internal
:
4078 if (elf_section_data (section
)->relocs
== NULL
)
4079 free (internal_relocs
);
4080 goto error_ret_free_local
;
4083 /* Only look for stubs on CALLR and B instructions. */
4084 if (!(r_type
== (unsigned int) R_METAG_RELBRANCH
||
4085 r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
))
4088 /* Now determine the call target, its name, value,
4094 if (r_indx
< symtab_hdr
->sh_info
)
4096 /* It's a local symbol. */
4097 Elf_Internal_Sym
*sym
;
4098 Elf_Internal_Shdr
*hdr
;
4101 sym
= local_syms
+ r_indx
;
4102 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4103 sym_value
= sym
->st_value
;
4104 shndx
= sym
->st_shndx
;
4105 if (shndx
< elf_numsections (input_bfd
))
4107 hdr
= elf_elfsections (input_bfd
)[shndx
];
4108 sym_sec
= hdr
->bfd_section
;
4109 destination
= (sym_value
+ irela
->r_addend
4110 + sym_sec
->output_offset
4111 + sym_sec
->output_section
->vma
);
4116 /* It's an external symbol. */
4119 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4120 hh
= ((struct elf_metag_link_hash_entry
*)
4121 elf_sym_hashes (input_bfd
)[e_indx
]);
4123 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
4124 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
4125 hh
= ((struct elf_metag_link_hash_entry
*)
4126 hh
->eh
.root
.u
.i
.link
);
4128 if (hh
->eh
.root
.type
== bfd_link_hash_defined
4129 || hh
->eh
.root
.type
== bfd_link_hash_defweak
)
4131 sym_sec
= hh
->eh
.root
.u
.def
.section
;
4132 sym_value
= hh
->eh
.root
.u
.def
.value
;
4133 if (hh
->eh
.plt
.offset
!= (bfd_vma
) -1
4134 && hh
->eh
.dynindx
!= -1
4135 && r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
)
4137 sym_sec
= htab
->splt
;
4138 sym_value
= hh
->eh
.plt
.offset
;
4141 if (sym_sec
->output_section
!= NULL
)
4142 destination
= (sym_value
+ irela
->r_addend
4143 + sym_sec
->output_offset
4144 + sym_sec
->output_section
->vma
);
4148 else if (hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
4150 if (! bfd_link_pic (info
))
4153 else if (hh
->eh
.root
.type
== bfd_link_hash_undefined
)
4155 if (! (info
->unresolved_syms_in_objects
== RM_IGNORE
4156 && (ELF_ST_VISIBILITY (hh
->eh
.other
)
4162 bfd_set_error (bfd_error_bad_value
);
4163 goto error_ret_free_internal
;
4167 /* Determine what (if any) linker stub is needed. */
4168 stub_type
= metag_type_of_stub (section
, irela
, hh
,
4170 if (stub_type
== metag_stub_none
)
4173 /* Support for grouping stub sections. */
4174 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4176 /* Get the name of this stub. */
4177 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, irela
);
4179 goto error_ret_free_internal
;
4181 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
4186 /* The proper stub has already been created. */
4191 hsh
= metag_add_stub (stub_name
, section
, htab
);
4195 goto error_ret_free_internal
;
4197 hsh
->target_value
= sym_value
;
4198 hsh
->target_section
= sym_sec
;
4199 hsh
->stub_type
= stub_type
;
4201 hsh
->addend
= irela
->r_addend
;
4202 stub_changed
= TRUE
;
4205 /* We're done with the internal relocs, free them. */
4206 if (elf_section_data (section
)->relocs
== NULL
)
4207 free (internal_relocs
);
4214 /* OK, we've added some stubs. Find out the new size of the
4216 for (stub_sec
= htab
->stub_bfd
->sections
;
4218 stub_sec
= stub_sec
->next
)
4221 bfd_hash_traverse (&htab
->bstab
, metag_size_one_stub
, htab
);
4223 /* Ask the linker to do its stuff. */
4224 (*htab
->layout_sections_again
) ();
4225 stub_changed
= FALSE
;
4228 free (htab
->all_local_syms
);
4231 error_ret_free_local
:
4232 free (htab
->all_local_syms
);
4236 /* Build all the stubs associated with the current output file. The
4237 stubs are kept in a hash table attached to the main linker hash
4238 table. This function is called via metagelf_finish in the linker. */
4241 elf_metag_build_stubs (struct bfd_link_info
*info
)
4244 struct bfd_hash_table
*table
;
4245 struct elf_metag_link_hash_table
*htab
;
4247 htab
= metag_link_hash_table (info
);
4249 for (stub_sec
= htab
->stub_bfd
->sections
;
4251 stub_sec
= stub_sec
->next
)
4255 /* Allocate memory to hold the linker stubs. */
4256 size
= stub_sec
->size
;
4257 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4258 if (stub_sec
->contents
== NULL
&& size
!= 0)
4263 /* Build the stubs as directed by the stub hash table. */
4264 table
= &htab
->bstab
;
4265 bfd_hash_traverse (table
, metag_build_one_stub
, info
);
4270 /* Return TRUE if SYM represents a local label symbol. */
4273 elf_metag_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
4275 if (name
[0] == '$' && name
[1] == 'L')
4277 return _bfd_elf_is_local_label_name (abfd
, name
);
4280 /* Return address for Ith PLT stub in section PLT, for relocation REL
4281 or (bfd_vma) -1 if it should not be included. */
4284 elf_metag_plt_sym_val (bfd_vma i
, const asection
*plt
,
4285 const arelent
*rel ATTRIBUTE_UNUSED
)
4287 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4290 #define ELF_ARCH bfd_arch_metag
4291 #define ELF_TARGET_ID METAG_ELF_DATA
4292 #define ELF_MACHINE_CODE EM_METAG
4293 #define ELF_MINPAGESIZE 0x1000
4294 #define ELF_MAXPAGESIZE 0x4000
4295 #define ELF_COMMONPAGESIZE 0x1000
4297 #define TARGET_LITTLE_SYM metag_elf32_vec
4298 #define TARGET_LITTLE_NAME "elf32-metag"
4300 #define elf_symbol_leading_char '_'
4302 #define elf_info_to_howto_rel NULL
4303 #define elf_info_to_howto metag_info_to_howto_rela
4305 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4306 #define bfd_elf32_bfd_link_hash_table_create \
4307 elf_metag_link_hash_table_create
4308 #define elf_backend_relocate_section elf_metag_relocate_section
4309 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4310 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4311 #define elf_backend_check_relocs elf_metag_check_relocs
4312 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4313 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4314 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4315 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4316 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4317 #define elf_backend_omit_section_dynsym \
4318 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4319 #define elf_backend_post_process_headers elf_metag_post_process_headers
4320 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4321 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4322 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4324 #define elf_backend_can_gc_sections 1
4325 #define elf_backend_can_refcount 1
4326 #define elf_backend_got_header_size 12
4327 #define elf_backend_rela_normal 1
4328 #define elf_backend_want_got_sym 0
4329 #define elf_backend_want_plt_sym 0
4330 #define elf_backend_plt_readonly 1
4332 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4333 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4335 #include "elf32-target.h"