1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013 Free Software Foundation, Inc.
3 Contributed by Imagination Technologies Ltd.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "elf32-metag.h"
27 #include "elf/metag.h"
29 #define GOT_ENTRY_SIZE 4
30 #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0"
34 1 - with GOT offset */
35 #define METAG_ELF_ABI_VERSION 1
37 static const unsigned int plt0_entry
[] =
39 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */
40 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */
41 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
42 0xc600012a, /* GETD PC, [D0Re0+#4] */
46 static const unsigned int plt0_pic_entry
[] =
48 0x82900001, /* ADDT A0.2, CPC0, #0 */
49 0x82100000, /* ADD A0.2, A0.2, #0 */
50 0xa3100c20, /* MOV D0Re0, A0.2 */
51 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */
52 0xc600012a, /* GETD PC, [D0Re0+#4] */
55 static const unsigned int plt_entry
[] =
57 0x82100005, /* MOVT A0.2, #HI(GOT+off) */
58 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
59 0xc600806a, /* GETD PC, [A0.2] */
60 0x03000004, /* MOV D1Re0, #LO(offset) */
61 0xa0000000 /* B PLT0 */
64 static const unsigned int plt_pic_entry
[] =
66 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */
67 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */
68 0xc600806a, /* GETD PC, [A0.2] */
69 0x03000004, /* MOV D1Re0, #LO(offset) */
70 0xa0000000 /* B PLT0 */
73 /* Variable names follow a coding style.
74 Please follow this (Apps Hungarian) style:
76 Structure/Variable Prefix
77 elf_link_hash_table "etab"
78 elf_link_hash_entry "eh"
80 elf_metag_link_hash_table "htab"
81 elf_metag_link_hash_entry "hh"
83 bfd_link_hash_table "btab"
84 bfd_link_hash_entry "bh"
86 bfd_hash_table containing stubs "bstab"
87 elf_metag_stub_hash_entry "hsh"
89 elf_metag_dyn_reloc_entry "hdh"
91 Always remember to use GNU Coding Style. */
93 #define PLT_ENTRY_SIZE sizeof(plt_entry)
95 static reloc_howto_type elf_metag_howto_table
[] =
97 /* High order 16 bit absolute. */
98 HOWTO (R_METAG_HIADDR16
, /* type */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
102 FALSE
, /* pc_relative */
104 complain_overflow_dont
, /* complain_on_overflow */
105 bfd_elf_generic_reloc
, /* special_function */
106 "R_METAG_HIADDR16", /* name */
107 FALSE
, /* partial_inplace */
109 0x0007fff8, /* dst_mask */
110 FALSE
), /* pcrel_offset */
112 /* Low order 16 bit absolute. */
113 HOWTO (R_METAG_LOADDR16
, /* type */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
117 FALSE
, /* pc_relative */
119 complain_overflow_dont
,/* complain_on_overflow */
120 bfd_elf_generic_reloc
, /* special_function */
121 "R_METAG_LOADDR16", /* name */
122 FALSE
, /* partial_inplace */
124 0x0007fff8, /* dst_mask */
125 FALSE
), /* pcrel_offset */
127 /* 32 bit absolute. */
128 HOWTO (R_METAG_ADDR32
, /* type */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
132 FALSE
, /* pc_relative */
134 complain_overflow_bitfield
, /* complain_on_overflow */
135 bfd_elf_generic_reloc
, /* special_function */
136 "R_METAG_ADDR32", /* name */
137 FALSE
, /* partial_inplace */
138 0x00000000, /* src_mask */
139 0xffffffff, /* dst_mask */
140 FALSE
), /* pcrel_offset */
143 HOWTO (R_METAG_NONE
, /* type */
145 0, /* size (0 = byte, 1 = short, 2 = long) */
147 FALSE
, /* pc_relative */
149 complain_overflow_dont
, /* complain_on_overflow */
150 bfd_elf_generic_reloc
, /* special_function */
151 "R_METAG_NONE", /* name */
152 FALSE
, /* partial_inplace */
155 FALSE
), /* pcrel_offset */
157 /* 19 bit pc relative */
158 HOWTO (R_METAG_RELBRANCH
, /* type */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
162 TRUE
, /* pc_relative */
164 complain_overflow_signed
, /* complain_on_overflow */
165 bfd_elf_generic_reloc
, /* special_function */
166 "R_METAG_RELBRANCH", /* name */
167 FALSE
, /* partial_inplace */
169 0x00ffffe0, /* dst_mask */
170 FALSE
), /* pcrel_offset */
173 HOWTO (R_METAG_GETSETOFF
, /* type */
175 1, /* size (0 = byte, 1 = short, 2 = long) */
177 FALSE
, /* pc_relative */
179 complain_overflow_dont
, /* complain_on_overflow */
180 bfd_elf_generic_reloc
, /* special_function */
181 "R_METAG_GETSETOFF", /* name */
182 FALSE
, /* partial_inplace */
185 FALSE
), /* pcrel_offset */
212 HOWTO (R_METAG_GNU_VTINHERIT
, /* type */
214 2, /* size (0 = byte, 1 = short, 2 = long) */
216 FALSE
, /* pc_relative */
218 complain_overflow_dont
, /* complain_on_overflow */
219 NULL
, /* special_function */
220 "R_METAG_GNU_VTINHERIT", /* name */
221 FALSE
, /* partial_inplace */
224 FALSE
), /* pcrel_offset */
226 HOWTO (R_METAG_GNU_VTENTRY
, /* type */
228 2, /* size (0 = byte, 1 = short, 2 = long) */
230 FALSE
, /* pc_relative */
232 complain_overflow_dont
, /* complain_on_overflow */
233 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
234 "R_METAG_GNU_VTENTRY", /* name */
235 FALSE
, /* partial_inplace */
238 FALSE
), /* pcrel_offset */
240 /* High order 16 bit GOT offset */
241 HOWTO (R_METAG_HI16_GOTOFF
, /* type */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
245 FALSE
, /* pc_relative */
247 complain_overflow_dont
, /* complain_on_overflow */
248 bfd_elf_generic_reloc
, /* special_function */
249 "R_METAG_HI16_GOTOFF", /* name */
250 FALSE
, /* partial_inplace */
252 0x0007fff8, /* dst_mask */
253 FALSE
), /* pcrel_offset */
255 /* Low order 16 bit GOT offset */
256 HOWTO (R_METAG_LO16_GOTOFF
, /* type */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
260 FALSE
, /* pc_relative */
262 complain_overflow_dont
, /* complain_on_overflow */
263 bfd_elf_generic_reloc
, /* special_function */
264 "R_METAG_LO16_GOTOFF", /* name */
265 FALSE
, /* partial_inplace */
267 0x0007fff8, /* dst_mask */
268 FALSE
), /* pcrel_offset */
270 /* GET/SET GOT offset */
271 HOWTO (R_METAG_GETSET_GOTOFF
, /* type */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
275 FALSE
, /* pc_relative */
277 complain_overflow_dont
, /* complain_on_overflow */
278 bfd_elf_generic_reloc
, /* special_function */
279 "R_METAG_GETSET_GOTOFF", /* name */
280 FALSE
, /* partial_inplace */
283 FALSE
), /* pcrel_offset */
285 /* GET/SET GOT relative */
286 HOWTO (R_METAG_GETSET_GOT
, /* type */
288 1, /* size (0 = byte, 1 = short, 2 = long) */
290 FALSE
, /* pc_relative */
292 complain_overflow_dont
, /* complain_on_overflow */
293 bfd_elf_generic_reloc
, /* special_function */
294 "R_METAG_GETSET_GOT", /* name */
295 FALSE
, /* partial_inplace */
298 FALSE
), /* pcrel_offset */
300 /* High order 16 bit GOT reference */
301 HOWTO (R_METAG_HI16_GOTPC
, /* type */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
305 FALSE
, /* pc_relative */
307 complain_overflow_dont
, /* complain_on_overflow */
308 bfd_elf_generic_reloc
, /* special_function */
309 "R_METAG_HI16_GOTPC", /* name */
310 FALSE
, /* partial_inplace */
312 0x0007fff8, /* dst_mask */
313 FALSE
), /* pcrel_offset */
315 /* Low order 16 bit GOT reference */
316 HOWTO (R_METAG_LO16_GOTPC
, /* type */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
320 FALSE
, /* pc_relative */
322 complain_overflow_dont
, /* complain_on_overflow */
323 bfd_elf_generic_reloc
, /* special_function */
324 "R_METAG_LO16_GOTPC", /* name */
325 FALSE
, /* partial_inplace */
327 0x0007fff8, /* dst_mask */
328 FALSE
), /* pcrel_offset */
330 /* High order 16 bit PLT */
331 HOWTO (R_METAG_HI16_PLT
, /* type */
333 2, /* size (0 = byte, 1 = short, 2 = long) */
335 FALSE
, /* pc_relative */
337 complain_overflow_dont
, /* complain_on_overflow */
338 bfd_elf_generic_reloc
, /* special_function */
339 "R_METAG_HI16_PLT", /* name */
340 FALSE
, /* partial_inplace */
342 0x0007fff8, /* dst_mask */
343 FALSE
), /* pcrel_offset */
345 /* Low order 16 bit PLT */
346 HOWTO (R_METAG_LO16_PLT
, /* type */
348 2, /* size (0 = byte, 1 = short, 2 = long) */
350 FALSE
, /* pc_relative */
352 complain_overflow_dont
, /* complain_on_overflow */
353 bfd_elf_generic_reloc
, /* special_function */
354 "R_METAG_LO16_PLT", /* name */
355 FALSE
, /* partial_inplace */
357 0xffffffff, /* dst_mask */
358 FALSE
), /* pcrel_offset */
360 HOWTO (R_METAG_RELBRANCH_PLT
, /* type */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
364 TRUE
, /* pc_relative */
366 complain_overflow_signed
, /* complain_on_overflow */
367 bfd_elf_generic_reloc
, /* special_function */
368 "R_METAG_RELBRANCH_PLT", /* name */
369 FALSE
, /* partial_inplace */
371 0x00ffffe0, /* dst_mask */
372 FALSE
), /* pcrel_offset */
374 /* Dummy relocs used by the linker internally. */
375 HOWTO (R_METAG_GOTOFF
, /* type */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 FALSE
, /* pc_relative */
381 complain_overflow_bitfield
, /* complain_on_overflow */
382 bfd_elf_generic_reloc
, /* special_function */
383 "R_METAG_GOTOFF", /* name */
384 FALSE
, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 FALSE
), /* pcrel_offset */
389 HOWTO (R_METAG_PLT
, /* type */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_bitfield
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 "R_METAG_GOTOFF", /* name */
398 FALSE
, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
403 /* This is used only by the dynamic linker. The symbol should exist
404 both in the object being run and in some shared library. The
405 dynamic linker copies the data addressed by the symbol from the
406 shared library into the object, because the object being
407 run has to have the data at some particular address. */
408 HOWTO (R_METAG_COPY
, /* type */
410 2, /* size (0 = byte, 1 = short, 2 = long) */
412 FALSE
, /* pc_relative */
414 complain_overflow_bitfield
, /* complain_on_overflow */
415 bfd_elf_generic_reloc
, /* special_function */
416 "R_METAG_COPY", /* name */
417 FALSE
, /* partial_inplace */
418 0xffffffff, /* src_mask */
419 0xffffffff, /* dst_mask */
420 FALSE
), /* pcrel_offset */
422 /* Marks a procedure linkage table entry for a symbol. */
423 HOWTO (R_METAG_JMP_SLOT
, /* type */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
427 FALSE
, /* pc_relative */
429 complain_overflow_bitfield
, /* complain_on_overflow */
430 bfd_elf_generic_reloc
, /* special_function */
431 "R_METAG_JMP_SLOT", /* name */
432 FALSE
, /* partial_inplace */
433 0xffffffff, /* src_mask */
434 0xffffffff, /* dst_mask */
435 FALSE
), /* pcrel_offset */
437 /* Used only by the dynamic linker. When the object is run, this
438 longword is set to the load address of the object, plus the
440 HOWTO (R_METAG_RELATIVE
, /* type */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
444 FALSE
, /* pc_relative */
446 complain_overflow_bitfield
, /* complain_on_overflow */
447 bfd_elf_generic_reloc
, /* special_function */
448 "R_METAG_RELATIVE", /* name */
449 FALSE
, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE
), /* pcrel_offset */
454 HOWTO (R_METAG_GLOB_DAT
, /* type */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
458 FALSE
, /* pc_relative */
460 complain_overflow_bitfield
, /* complain_on_overflow */
461 bfd_elf_generic_reloc
, /* special_function */
462 "R_METAG_GLOB_DAT", /* name */
463 FALSE
, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE
), /* pcrel_offset */
468 HOWTO (R_METAG_TLS_GD
, /* type */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
472 FALSE
, /* pc_relative */
474 complain_overflow_dont
, /* complain_on_overflow */
475 bfd_elf_generic_reloc
, /* special_function */
476 "R_METAG_TLS_GD", /* name */
477 FALSE
, /* partial_inplace */
479 0x0007fff8, /* dst_mask */
480 FALSE
), /* pcrel_offset */
482 HOWTO (R_METAG_TLS_LDM
, /* type */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
486 FALSE
, /* pc_relative */
488 complain_overflow_bitfield
, /* complain_on_overflow */
489 bfd_elf_generic_reloc
, /* special_function */
490 "R_METAG_TLS_LDM", /* name */
491 FALSE
, /* partial_inplace */
493 0x0007fff8, /* dst_mask */
494 FALSE
), /* pcrel_offset */
496 HOWTO (R_METAG_TLS_LDO_HI16
, /* type */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
500 FALSE
, /* pc_relative */
502 complain_overflow_bitfield
, /* complain_on_overflow */
503 bfd_elf_generic_reloc
, /* special_function */
504 "R_METAG_TLS_LDO_HI16", /* name */
505 FALSE
, /* partial_inplace */
507 0x0007fff8, /* dst_mask */
508 FALSE
), /* pcrel_offset */
510 HOWTO (R_METAG_TLS_LDO_LO16
, /* type */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
514 FALSE
, /* pc_relative */
516 complain_overflow_bitfield
, /* complain_on_overflow */
517 bfd_elf_generic_reloc
, /* special_function */
518 "R_METAG_TLS_LDO_LO16", /* name */
519 FALSE
, /* partial_inplace */
521 0x0007fff8, /* dst_mask */
522 FALSE
), /* pcrel_offset */
524 /* Dummy reloc used by the linker internally. */
525 HOWTO (R_METAG_TLS_LDO
, /* type */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
529 FALSE
, /* pc_relative */
531 complain_overflow_bitfield
, /* complain_on_overflow */
532 bfd_elf_generic_reloc
, /* special_function */
533 "R_METAG_TLS_LDO", /* name */
534 FALSE
, /* partial_inplace */
536 0x0007fff8, /* dst_mask */
537 FALSE
), /* pcrel_offset */
539 HOWTO (R_METAG_TLS_IE
, /* type */
541 2, /* size (0 = byte, 1 = short, 2 = long) */
543 FALSE
, /* pc_relative */
545 complain_overflow_dont
, /* complain_on_overflow */
546 bfd_elf_generic_reloc
, /* special_function */
547 "R_METAG_TLS_IE", /* name */
548 FALSE
, /* partial_inplace */
550 0x0007ff80, /* dst_mask */
551 FALSE
), /* pcrel_offset */
553 /* Dummy reloc used by the linker internally. */
554 HOWTO (R_METAG_TLS_IENONPIC
, /* type */
556 2, /* size (0 = byte, 1 = short, 2 = long) */
558 FALSE
, /* pc_relative */
560 complain_overflow_dont
, /* complain_on_overflow */
561 bfd_elf_generic_reloc
, /* special_function */
562 "R_METAG_TLS_IENONPIC", /* name */
563 FALSE
, /* partial_inplace */
565 0x0007fff8, /* dst_mask */
566 FALSE
), /* pcrel_offset */
568 HOWTO (R_METAG_TLS_IENONPIC_HI16
,/* type */
570 2, /* size (0 = byte, 1 = short, 2 = long) */
572 FALSE
, /* pc_relative */
574 complain_overflow_dont
, /* complain_on_overflow */
575 bfd_elf_generic_reloc
, /* special_function */
576 "R_METAG_TLS_IENONPIC_HI16", /* name */
577 FALSE
, /* partial_inplace */
579 0x0007fff8, /* dst_mask */
580 FALSE
), /* pcrel_offset */
582 HOWTO (R_METAG_TLS_IENONPIC_LO16
,/* type */
584 2, /* size (0 = byte, 1 = short, 2 = long) */
586 FALSE
, /* pc_relative */
588 complain_overflow_dont
, /* complain_on_overflow */
589 bfd_elf_generic_reloc
, /* special_function */
590 "R_METAG_TLS_IENONPIC_LO16", /* name */
591 FALSE
, /* partial_inplace */
593 0x0007fff8, /* dst_mask */
594 FALSE
), /* pcrel_offset */
596 HOWTO (R_METAG_TLS_TPOFF
, /* type */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
600 FALSE
, /* pc_relative */
602 complain_overflow_bitfield
, /* complain_on_overflow */
603 bfd_elf_generic_reloc
, /* special_function */
604 "R_METAG_TLS_TPOFF", /* name */
605 FALSE
, /* partial_inplace */
607 0xffffffff, /* dst_mask */
608 FALSE
), /* pcrel_offset */
610 HOWTO (R_METAG_TLS_DTPMOD
, /* type */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
614 FALSE
, /* pc_relative */
616 complain_overflow_bitfield
, /* complain_on_overflow */
617 bfd_elf_generic_reloc
, /* special_function */
618 "R_METAG_TLS_DTPMOD", /* name */
619 FALSE
, /* partial_inplace */
621 0xffffffff, /* dst_mask */
622 FALSE
), /* pcrel_offset */
624 HOWTO (R_METAG_TLS_DTPOFF
, /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 FALSE
, /* pc_relative */
630 complain_overflow_bitfield
, /* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 "R_METAG_TLS_DTPOFF", /* name */
633 FALSE
, /* partial_inplace */
635 0xffffffff, /* dst_mask */
636 FALSE
), /* pcrel_offset */
638 /* Dummy reloc used by the linker internally. */
639 HOWTO (R_METAG_TLS_LE
, /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 FALSE
, /* pc_relative */
645 complain_overflow_bitfield
, /* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 "R_METAG_TLS_LE", /* name */
648 FALSE
, /* partial_inplace */
650 0xffffffff, /* dst_mask */
651 FALSE
), /* pcrel_offset */
653 HOWTO (R_METAG_TLS_LE_HI16
, /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 FALSE
, /* pc_relative */
659 complain_overflow_dont
, /* complain_on_overflow */
660 bfd_elf_generic_reloc
, /* special_function */
661 "R_METAG_TLS_LE_HI16", /* name */
662 FALSE
, /* partial_inplace */
664 0x0007fff8, /* dst_mask */
665 FALSE
), /* pcrel_offset */
667 HOWTO (R_METAG_TLS_LE_LO16
, /* type */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
671 FALSE
, /* pc_relative */
673 complain_overflow_dont
, /* complain_on_overflow */
674 bfd_elf_generic_reloc
, /* special_function */
675 "R_METAG_TLS_LE_LO16", /* name */
676 FALSE
, /* partial_inplace */
678 0x0007fff8, /* dst_mask */
679 FALSE
), /* pcrel_offset */
683 #define BRANCH_BITS 19
685 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
686 immediate offset which can be used in such instructions therefore limits
687 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
688 is pointing to the base of the GOT then the size is limited to the maximum
689 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
690 in a [GS]ETD instruction is signed, so by setting the base address register
691 to an offset of that 0x2000 byte maximum unsigned offset from the base of
692 the GOT we can use negative offsets in addition to positive. This
693 effectively doubles the usable GOT size to 0x4000 bytes. */
694 #define GOT_REG_OFFSET 0x2000
696 struct metag_reloc_map
698 bfd_reloc_code_real_type bfd_reloc_val
;
699 unsigned int metag_reloc_val
;
702 static const struct metag_reloc_map metag_reloc_map
[] =
704 { BFD_RELOC_NONE
, R_METAG_NONE
},
705 { BFD_RELOC_32
, R_METAG_ADDR32
},
706 { BFD_RELOC_METAG_HIADDR16
, R_METAG_HIADDR16
},
707 { BFD_RELOC_METAG_LOADDR16
, R_METAG_LOADDR16
},
708 { BFD_RELOC_METAG_RELBRANCH
, R_METAG_RELBRANCH
},
709 { BFD_RELOC_METAG_GETSETOFF
, R_METAG_GETSETOFF
},
710 { BFD_RELOC_VTABLE_INHERIT
, R_METAG_GNU_VTINHERIT
},
711 { BFD_RELOC_VTABLE_ENTRY
, R_METAG_GNU_VTENTRY
},
712 { BFD_RELOC_METAG_REL8
, R_METAG_REL8
},
713 { BFD_RELOC_METAG_REL16
, R_METAG_REL16
},
714 { BFD_RELOC_METAG_HI16_GOTOFF
, R_METAG_HI16_GOTOFF
},
715 { BFD_RELOC_METAG_LO16_GOTOFF
, R_METAG_LO16_GOTOFF
},
716 { BFD_RELOC_METAG_GETSET_GOTOFF
, R_METAG_GETSET_GOTOFF
},
717 { BFD_RELOC_METAG_GETSET_GOT
, R_METAG_GETSET_GOT
},
718 { BFD_RELOC_METAG_HI16_GOTPC
, R_METAG_HI16_GOTPC
},
719 { BFD_RELOC_METAG_LO16_GOTPC
, R_METAG_LO16_GOTPC
},
720 { BFD_RELOC_METAG_HI16_PLT
, R_METAG_HI16_PLT
},
721 { BFD_RELOC_METAG_LO16_PLT
, R_METAG_LO16_PLT
},
722 { BFD_RELOC_METAG_RELBRANCH_PLT
, R_METAG_RELBRANCH_PLT
},
723 { BFD_RELOC_METAG_GOTOFF
, R_METAG_GOTOFF
},
724 { BFD_RELOC_METAG_PLT
, R_METAG_PLT
},
725 { BFD_RELOC_METAG_COPY
, R_METAG_COPY
},
726 { BFD_RELOC_METAG_JMP_SLOT
, R_METAG_JMP_SLOT
},
727 { BFD_RELOC_METAG_RELATIVE
, R_METAG_RELATIVE
},
728 { BFD_RELOC_METAG_GLOB_DAT
, R_METAG_GLOB_DAT
},
729 { BFD_RELOC_METAG_TLS_GD
, R_METAG_TLS_GD
},
730 { BFD_RELOC_METAG_TLS_LDM
, R_METAG_TLS_LDM
},
731 { BFD_RELOC_METAG_TLS_LDO_HI16
, R_METAG_TLS_LDO_HI16
},
732 { BFD_RELOC_METAG_TLS_LDO_LO16
, R_METAG_TLS_LDO_LO16
},
733 { BFD_RELOC_METAG_TLS_LDO
, R_METAG_TLS_LDO
},
734 { BFD_RELOC_METAG_TLS_IE
, R_METAG_TLS_IE
},
735 { BFD_RELOC_METAG_TLS_IENONPIC
, R_METAG_TLS_IENONPIC
},
736 { BFD_RELOC_METAG_TLS_IENONPIC_HI16
, R_METAG_TLS_IENONPIC_HI16
},
737 { BFD_RELOC_METAG_TLS_IENONPIC_LO16
, R_METAG_TLS_IENONPIC_LO16
},
738 { BFD_RELOC_METAG_TLS_TPOFF
, R_METAG_TLS_TPOFF
},
739 { BFD_RELOC_METAG_TLS_DTPMOD
, R_METAG_TLS_DTPMOD
},
740 { BFD_RELOC_METAG_TLS_DTPOFF
, R_METAG_TLS_DTPOFF
},
741 { BFD_RELOC_METAG_TLS_LE
, R_METAG_TLS_LE
},
742 { BFD_RELOC_METAG_TLS_LE_HI16
, R_METAG_TLS_LE_HI16
},
743 { BFD_RELOC_METAG_TLS_LE_LO16
, R_METAG_TLS_LE_LO16
},
746 enum elf_metag_stub_type
748 metag_stub_long_branch
,
749 metag_stub_long_branch_shared
,
753 struct elf_metag_stub_hash_entry
755 /* Base hash table entry structure. */
756 struct bfd_hash_entry bh_root
;
758 /* The stub section. */
761 /* Offset within stub_sec of the beginning of this stub. */
764 /* Given the symbol's value and its section we can determine its final
765 value when building the stubs (so the stub knows where to jump. */
766 bfd_vma target_value
;
767 asection
*target_section
;
769 enum elf_metag_stub_type stub_type
;
771 /* The symbol table entry, if any, that this was derived from. */
772 struct elf_metag_link_hash_entry
*hh
;
774 /* And the reloc addend that this was derived from. */
777 /* Where this stub is being called from, or, in the case of combined
778 stub sections, the first input section in the group. */
782 struct elf_metag_link_hash_entry
784 struct elf_link_hash_entry eh
;
786 /* A pointer to the most recently used stub hash entry against this
788 struct elf_metag_stub_hash_entry
*hsh_cache
;
790 /* Used to count relocations for delayed sizing of relocation
792 struct elf_metag_dyn_reloc_entry
{
794 /* Next relocation in the chain. */
795 struct elf_metag_dyn_reloc_entry
*hdh_next
;
797 /* The input section of the reloc. */
800 /* Number of relocs copied in this section. */
803 /* Number of relative relocs copied for the input section. */
804 bfd_size_type relative_count
;
809 GOT_UNKNOWN
= 0, GOT_NORMAL
= 1, GOT_TLS_IE
= 2, GOT_TLS_LDM
= 4, GOT_TLS_GD
= 8
813 struct elf_metag_link_hash_table
815 /* The main hash table. */
816 struct elf_link_hash_table etab
;
818 /* The stub hash table. */
819 struct bfd_hash_table bstab
;
821 /* Linker stub bfd. */
824 /* Linker call-backs. */
825 asection
* (*add_stub_section
) (const char *, asection
*);
826 void (*layout_sections_again
) (void);
828 /* Array to keep track of which stub sections have been created, and
829 information on stub grouping. */
832 /* This is the section to which stubs in the group will be
835 /* The stub section. */
839 /* Assorted information used by elf_metag_size_stubs. */
840 unsigned int bfd_count
;
842 asection
**input_list
;
843 Elf_Internal_Sym
**all_local_syms
;
845 /* Short-cuts to get to dynamic linker sections. */
854 /* Small local sym cache. */
855 struct sym_cache sym_cache
;
857 /* Data for LDM relocations. */
860 bfd_signed_vma refcount
;
865 /* Return the base vma address which should be subtracted from the
866 real address when resolving a dtpoff relocation. This is PT_TLS
869 dtpoff_base (struct bfd_link_info
*info
)
871 /* If tls_sec is NULL, we should have signalled an error already. */
872 if (elf_hash_table (info
)->tls_sec
== NULL
)
874 return elf_hash_table (info
)->tls_sec
->vma
;
877 /* Return the relocation value for R_METAG_TLS_IE */
879 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
881 /* If tls_sec is NULL, we should have signalled an error already. */
882 if (elf_hash_table (info
)->tls_sec
== NULL
)
884 /* METAG TLS ABI is variant I and static TLS blocks start just after
885 tcbhead structure which has 2 pointer fields. */
886 return (address
- elf_hash_table (info
)->tls_sec
->vma
887 + align_power ((bfd_vma
) 8,
888 elf_hash_table (info
)->tls_sec
->alignment_power
));
892 metag_info_to_howto_rela (bfd
*abfd ATTRIBUTE_UNUSED
,
894 Elf_Internal_Rela
*dst
)
898 r_type
= ELF32_R_TYPE (dst
->r_info
);
899 BFD_ASSERT (r_type
< (unsigned int) R_METAG_MAX
);
900 cache_ptr
->howto
= & elf_metag_howto_table
[r_type
];
903 static reloc_howto_type
*
904 metag_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
905 bfd_reloc_code_real_type code
)
909 for (i
= 0; i
< sizeof (metag_reloc_map
) / sizeof (metag_reloc_map
[0]); i
++)
910 if (metag_reloc_map
[i
].bfd_reloc_val
== code
)
911 return & elf_metag_howto_table
[metag_reloc_map
[i
].metag_reloc_val
];
916 static reloc_howto_type
*
917 metag_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
922 for (i
= 0; i
< sizeof (elf_metag_howto_table
) / sizeof (elf_metag_howto_table
[0]); i
++)
923 if (elf_metag_howto_table
[i
].name
!= NULL
924 && strcasecmp (elf_metag_howto_table
[i
].name
, r_name
) == 0)
925 return &elf_metag_howto_table
[i
];
930 /* Various hash macros and functions. */
931 #define metag_link_hash_table(p) \
932 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
933 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
935 #define metag_elf_hash_entry(ent) \
936 ((struct elf_metag_link_hash_entry *)(ent))
938 #define metag_stub_hash_entry(ent) \
939 ((struct elf_metag_stub_hash_entry *)(ent))
941 #define metag_stub_hash_lookup(table, string, create, copy) \
942 ((struct elf_metag_stub_hash_entry *) \
943 bfd_hash_lookup ((table), (string), (create), (copy)))
945 #define metag_elf_local_got_tls_type(abfd) \
946 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
948 /* Assorted hash table functions. */
950 /* Initialize an entry in the stub hash table. */
952 static struct bfd_hash_entry
*
953 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
954 struct bfd_hash_table
*table
,
957 /* Allocate the structure if it has not already been allocated by a
961 entry
= bfd_hash_allocate (table
,
962 sizeof (struct elf_metag_stub_hash_entry
));
967 /* Call the allocation method of the superclass. */
968 entry
= bfd_hash_newfunc (entry
, table
, string
);
971 struct elf_metag_stub_hash_entry
*hsh
;
973 /* Initialize the local fields. */
974 hsh
= (struct elf_metag_stub_hash_entry
*) entry
;
975 hsh
->stub_sec
= NULL
;
976 hsh
->stub_offset
= 0;
977 hsh
->target_value
= 0;
978 hsh
->target_section
= NULL
;
979 hsh
->stub_type
= metag_stub_long_branch
;
987 /* Initialize an entry in the link hash table. */
989 static struct bfd_hash_entry
*
990 metag_link_hash_newfunc (struct bfd_hash_entry
*entry
,
991 struct bfd_hash_table
*table
,
994 /* Allocate the structure if it has not already been allocated by a
998 entry
= bfd_hash_allocate (table
,
999 sizeof (struct elf_metag_link_hash_entry
));
1004 /* Call the allocation method of the superclass. */
1005 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1008 struct elf_metag_link_hash_entry
*hh
;
1010 /* Initialize the local fields. */
1011 hh
= (struct elf_metag_link_hash_entry
*) entry
;
1012 hh
->hsh_cache
= NULL
;
1013 hh
->dyn_relocs
= NULL
;
1014 hh
->tls_type
= GOT_UNKNOWN
;
1020 /* Create the derived linker hash table. The Meta ELF port uses the derived
1021 hash table to keep information specific to the Meta ELF linker (without
1022 using static variables). */
1024 static struct bfd_link_hash_table
*
1025 elf_metag_link_hash_table_create (bfd
*abfd
)
1027 struct elf_metag_link_hash_table
*htab
;
1028 bfd_size_type amt
= sizeof (*htab
);
1030 htab
= bfd_zmalloc (amt
);
1034 if (!_bfd_elf_link_hash_table_init (&htab
->etab
, abfd
,
1035 metag_link_hash_newfunc
,
1036 sizeof (struct elf_metag_link_hash_entry
),
1043 /* Init the stub hash table too. */
1044 if (!bfd_hash_table_init (&htab
->bstab
, stub_hash_newfunc
,
1045 sizeof (struct elf_metag_stub_hash_entry
)))
1048 return &htab
->etab
.root
;
1051 /* Free the derived linker hash table. */
1054 elf_metag_link_hash_table_free (struct bfd_link_hash_table
*btab
)
1056 struct elf_metag_link_hash_table
*htab
1057 = (struct elf_metag_link_hash_table
*) btab
;
1059 bfd_hash_table_free (&htab
->bstab
);
1060 _bfd_generic_link_hash_table_free (btab
);
1063 /* Section name for stubs is the associated section name plus this
1065 #define STUB_SUFFIX ".stub"
1067 /* Build a name for an entry in the stub hash table. */
1070 metag_stub_name (const asection
*input_section
,
1071 const asection
*sym_sec
,
1072 const struct elf_metag_link_hash_entry
*hh
,
1073 const Elf_Internal_Rela
*rel
)
1080 len
= 8 + 1 + strlen (hh
->eh
.root
.root
.string
) + 1 + 8 + 1;
1081 stub_name
= bfd_malloc (len
);
1082 if (stub_name
!= NULL
)
1084 sprintf (stub_name
, "%08x_%s+%x",
1085 input_section
->id
& 0xffffffff,
1086 hh
->eh
.root
.root
.string
,
1087 (int) rel
->r_addend
& 0xffffffff);
1092 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1093 stub_name
= bfd_malloc (len
);
1094 if (stub_name
!= NULL
)
1096 sprintf (stub_name
, "%08x_%x:%x+%x",
1097 input_section
->id
& 0xffffffff,
1098 sym_sec
->id
& 0xffffffff,
1099 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
1100 (int) rel
->r_addend
& 0xffffffff);
1106 /* Look up an entry in the stub hash. Stub entries are cached because
1107 creating the stub name takes a bit of time. */
1109 static struct elf_metag_stub_hash_entry
*
1110 metag_get_stub_entry (const asection
*input_section
,
1111 const asection
*sym_sec
,
1112 struct elf_metag_link_hash_entry
*hh
,
1113 const Elf_Internal_Rela
*rel
,
1114 struct elf_metag_link_hash_table
*htab
)
1116 struct elf_metag_stub_hash_entry
*hsh
;
1117 const asection
*id_sec
;
1119 /* If this input section is part of a group of sections sharing one
1120 stub section, then use the id of the first section in the group.
1121 Stub names need to include a section id, as there may well be
1122 more than one stub used to reach say, printf, and we need to
1123 distinguish between them. */
1124 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
1126 if (hh
!= NULL
&& hh
->hsh_cache
!= NULL
1127 && hh
->hsh_cache
->hh
== hh
1128 && hh
->hsh_cache
->id_sec
== id_sec
)
1130 hsh
= hh
->hsh_cache
;
1136 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, rel
);
1137 if (stub_name
== NULL
)
1140 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
1141 stub_name
, FALSE
, FALSE
);
1144 hh
->hsh_cache
= hsh
;
1152 /* Add a new stub entry to the stub hash. Not all fields of the new
1153 stub entry are initialised. */
1155 static struct elf_metag_stub_hash_entry
*
1156 metag_add_stub (const char *stub_name
,
1158 struct elf_metag_link_hash_table
*htab
)
1162 struct elf_metag_stub_hash_entry
*hsh
;
1164 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
1165 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
1166 if (stub_sec
== NULL
)
1168 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
1169 if (stub_sec
== NULL
)
1175 namelen
= strlen (link_sec
->name
);
1176 len
= namelen
+ sizeof (STUB_SUFFIX
);
1177 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
1181 memcpy (s_name
, link_sec
->name
, namelen
);
1182 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
1184 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
1185 if (stub_sec
== NULL
)
1187 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
1189 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
1192 /* Enter this entry into the linker stub hash table. */
1193 hsh
= metag_stub_hash_lookup (&htab
->bstab
, stub_name
,
1197 (*_bfd_error_handler
) (_("%B: cannot create stub entry %s"),
1203 hsh
->stub_sec
= stub_sec
;
1204 hsh
->stub_offset
= 0;
1205 hsh
->id_sec
= link_sec
;
1209 /* Check a signed integer value can be represented in the given number
1213 within_signed_range (int value
, unsigned int bits
)
1215 int min_val
= -(1 << (bits
- 1));
1216 int max_val
= (1 << (bits
- 1)) - 1;
1217 return (value
<= max_val
) && (value
>= min_val
);
1220 /* Perform a relocation as part of a final link. */
1222 static bfd_reloc_status_type
1223 metag_final_link_relocate (reloc_howto_type
*howto
,
1225 asection
*input_section
,
1227 Elf_Internal_Rela
*rel
,
1229 struct elf_metag_link_hash_entry
*hh
,
1230 struct elf_metag_link_hash_table
*htab
,
1233 bfd_reloc_status_type r
= bfd_reloc_ok
;
1234 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
1235 int opcode
, op_shift
, op_extended
, l1
, l2
;
1236 bfd_signed_vma srel
, addend
= rel
->r_addend
;
1237 struct elf_metag_stub_hash_entry
*hsh
= NULL
;
1240 /* Find out where we are and where we're going. */
1241 location
= (rel
->r_offset
+
1242 input_section
->output_offset
+
1243 input_section
->output_section
->vma
);
1245 switch (howto
->type
)
1247 case R_METAG_RELBRANCH
:
1248 case R_METAG_RELBRANCH_PLT
:
1249 /* Make it a pc relative offset. */
1250 relocation
-= location
;
1252 case R_METAG_TLS_GD
:
1253 case R_METAG_TLS_IE
:
1254 relocation
-= elf_gp (input_section
->output_section
->owner
);
1260 switch (howto
->type
)
1262 case R_METAG_RELBRANCH_PLT
:
1263 case R_METAG_RELBRANCH
:
1264 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1266 srel
= (bfd_signed_vma
) relocation
;
1269 /* If the branch is out of reach, then redirect the
1270 call to the local stub for this function. */
1271 if (srel
> ((1 << (BRANCH_BITS
+ 1)) - 1) ||
1272 (srel
< - (1 << (BRANCH_BITS
+ 1))))
1274 if (sym_sec
== NULL
)
1277 hsh
= metag_get_stub_entry (input_section
, sym_sec
,
1280 return bfd_reloc_undefined
;
1282 /* Munge up the value and addend so that we call the stub
1283 rather than the procedure directly. */
1284 srel
= (hsh
->stub_offset
1285 + hsh
->stub_sec
->output_offset
1286 + hsh
->stub_sec
->output_section
->vma
);
1292 if (!within_signed_range (srel
, BRANCH_BITS
))
1294 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1297 return bfd_reloc_overflow
;
1300 opcode
&= ~(0x7ffff << 5);
1301 opcode
|= ((srel
& 0x7ffff) << 5);
1303 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1305 case R_METAG_GETSETOFF
:
1306 case R_METAG_GETSET_GOT
:
1307 case R_METAG_GETSET_GOTOFF
:
1308 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1310 srel
= (bfd_signed_vma
) relocation
;
1313 /* Is this a standard or extended GET/SET? */
1314 if ((opcode
& 0xf0000000) == 0xa0000000)
1316 /* Extended GET/SET. */
1323 /* Standard GET/SET. */
1324 l1
= opcode
& 0x01000000;
1325 l2
= opcode
& 0x04000000;
1329 /* Calculate the width of the GET/SET and how much we need to
1330 shift the result by. */
1342 /* GET/SET offsets are scaled by the width of the transfer. */
1343 srel
= srel
>> op_shift
;
1345 /* Extended GET/SET has signed 12 bits of offset, standard has
1349 if (!within_signed_range (srel
, 12))
1351 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1354 return bfd_reloc_overflow
;
1356 opcode
&= ~(0xfff << 7);
1357 opcode
|= ((srel
& 0xfff) << 7);
1361 if (!within_signed_range (srel
, 5))
1363 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1366 return bfd_reloc_overflow
;
1368 opcode
&= ~(0x3f << 8);
1369 opcode
|= ((srel
& 0x3f) << 8);
1372 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1374 case R_METAG_TLS_GD
:
1375 case R_METAG_TLS_LDM
:
1376 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1378 if ((bfd_signed_vma
)relocation
< 0)
1380 /* sign extend immediate */
1381 if ((opcode
& 0xf2000001) == 0x02000000)
1383 /* ADD De.e,Dx.r,#I16 */
1387 return bfd_reloc_overflow
;
1390 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1392 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1393 contents
, rel
->r_offset
,
1394 relocation
, rel
->r_addend
);
1397 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1398 contents
, rel
->r_offset
,
1399 relocation
, rel
->r_addend
);
1405 /* This is defined because R_METAG_NONE != 0...
1406 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1407 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1408 rel, relend, howto, contents) \
1410 _bfd_clear_contents (howto, input_bfd, input_section, \
1411 contents + rel->r_offset); \
1413 if (info->relocatable \
1414 && (input_section->flags & SEC_DEBUGGING)) \
1416 /* Only remove relocations in debug sections since other \
1417 sections may require relocations. */ \
1418 Elf_Internal_Shdr *rel_hdr; \
1420 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1422 /* Avoid empty output section. */ \
1423 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1425 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1426 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1427 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1429 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1431 input_section->reloc_count--; \
1438 rel->r_info = R_METAG_NONE; \
1439 rel->r_addend = 0; \
1443 /* Relocate a META ELF section.
1445 The RELOCATE_SECTION function is called by the new ELF backend linker
1446 to handle the relocations for a section.
1448 The relocs are always passed as Rela structures; if the section
1449 actually uses Rel structures, the r_addend field will always be
1452 This function is responsible for adjusting the section contents as
1453 necessary, and (if using Rela relocs and generating a relocatable
1454 output file) adjusting the reloc addend as necessary.
1456 This function does not have to worry about setting the reloc
1457 address or the reloc symbol index.
1459 LOCAL_SYMS is a pointer to the swapped in local symbols.
1461 LOCAL_SECTIONS is an array giving the section in the input file
1462 corresponding to the st_shndx field of each local symbol.
1464 The global hash table entry for the global symbols can be found
1465 via elf_sym_hashes (input_bfd).
1467 When generating relocatable output, this function must handle
1468 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1469 going to be the section symbol corresponding to the output
1470 section, which means that the addend must be adjusted
1474 elf_metag_relocate_section (bfd
*output_bfd
,
1475 struct bfd_link_info
*info
,
1477 asection
*input_section
,
1479 Elf_Internal_Rela
*relocs
,
1480 Elf_Internal_Sym
*local_syms
,
1481 asection
**local_sections
)
1483 bfd_vma
*local_got_offsets
;
1484 Elf_Internal_Shdr
*symtab_hdr
;
1485 struct elf_link_hash_entry
**eh_syms
;
1486 struct elf_metag_link_hash_table
*htab
;
1487 Elf_Internal_Rela
*rel
;
1488 Elf_Internal_Rela
*relend
;
1491 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1492 eh_syms
= elf_sym_hashes (input_bfd
);
1493 relend
= relocs
+ input_section
->reloc_count
;
1495 htab
= metag_link_hash_table (info
);
1496 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1500 for (rel
= relocs
; rel
< relend
; rel
++)
1502 reloc_howto_type
*howto
;
1503 unsigned long r_symndx
;
1504 Elf_Internal_Sym
*sym
;
1506 struct elf_metag_link_hash_entry
*hh
;
1508 bfd_reloc_status_type r
;
1512 r_type
= ELF32_R_TYPE (rel
->r_info
);
1514 if (r_type
== R_METAG_GNU_VTINHERIT
1515 || r_type
== R_METAG_GNU_VTENTRY
1516 || r_type
== R_METAG_NONE
)
1519 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1521 howto
= elf_metag_howto_table
+ ELF32_R_TYPE (rel
->r_info
);
1526 if (r_symndx
< symtab_hdr
->sh_info
)
1528 sym
= local_syms
+ r_symndx
;
1529 sec
= local_sections
[r_symndx
];
1530 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1532 name
= bfd_elf_string_from_elf_section
1533 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
1534 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
1538 struct elf_link_hash_entry
*eh
;
1539 bfd_boolean unresolved_reloc
, warned
;
1541 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1542 r_symndx
, symtab_hdr
, eh_syms
,
1543 eh
, sec
, relocation
,
1544 unresolved_reloc
, warned
);
1546 name
= eh
->root
.root
.string
;
1547 hh
= (struct elf_metag_link_hash_entry
*) eh
;
1550 if (sec
!= NULL
&& discarded_section (sec
))
1551 METAG_RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1552 rel
, relend
, howto
, contents
);
1554 if (info
->relocatable
)
1559 case R_METAG_ADDR32
:
1560 case R_METAG_RELBRANCH
:
1561 if ((input_section
->flags
& SEC_ALLOC
) == 0)
1565 && r_symndx
!= STN_UNDEF
1566 && (input_section
->flags
& SEC_ALLOC
) != 0
1567 && (r_type
!= R_METAG_RELBRANCH
1568 || !SYMBOL_CALLS_LOCAL (info
, &hh
->eh
)))
1571 && hh
->eh
.dynindx
!= -1
1572 && !hh
->eh
.non_got_ref
1573 && ((hh
->eh
.def_dynamic
1574 && !hh
->eh
.def_regular
)
1575 || hh
->eh
.root
.type
== bfd_link_hash_undefweak
1576 || hh
->eh
.root
.type
== bfd_link_hash_undefined
)))
1578 Elf_Internal_Rela outrel
;
1579 bfd_boolean skip
, relocate
;
1582 /* When generating a shared object, these relocations
1583 are copied into the output file to be resolved at run
1586 sreloc
= elf_section_data (input_section
)->sreloc
;
1587 BFD_ASSERT (sreloc
!= NULL
);
1592 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
1596 if (outrel
.r_offset
== (bfd_vma
) -1)
1598 else if (outrel
.r_offset
== (bfd_vma
) -2)
1599 skip
= TRUE
, relocate
= TRUE
;
1600 outrel
.r_offset
+= (input_section
->output_section
->vma
1601 + input_section
->output_offset
);
1605 memset (&outrel
, 0, sizeof outrel
);
1606 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_NONE
);
1608 else if (r_type
== R_METAG_RELBRANCH
)
1610 BFD_ASSERT (hh
!= NULL
&& hh
->eh
.dynindx
!= -1);
1611 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1612 outrel
.r_addend
= rel
->r_addend
;
1616 /* h->dynindx may be -1 if this symbol was marked to
1619 || ((info
->symbolic
|| hh
->eh
.dynindx
== -1)
1620 && hh
->eh
.def_regular
))
1623 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1624 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1628 BFD_ASSERT (hh
->eh
.dynindx
!= -1);
1629 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1630 outrel
.r_addend
= rel
->r_addend
;
1634 loc
= sreloc
->contents
;
1635 loc
+= sreloc
->reloc_count
* sizeof(Elf32_External_Rela
);
1636 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,loc
);
1637 ++sreloc
->reloc_count
;
1639 /* If this reloc is against an external symbol, we do
1640 not want to fiddle with the addend. Otherwise, we
1641 need to include the symbol value so that it becomes
1642 an addend for the dynamic reloc. */
1648 case R_METAG_RELBRANCH_PLT
:
1649 /* Relocation is to the entry for this symbol in the
1650 procedure linkage table. */
1655 if (hh
->eh
.forced_local
)
1658 if (hh
->eh
.plt
.offset
== (bfd_vma
) -1 ||
1661 /* We didn't make a PLT entry for this symbol. This
1662 happens when statically linking PIC code, or when
1663 using -Bsymbolic. */
1667 relocation
= (htab
->splt
->output_section
->vma
1668 + htab
->splt
->output_offset
1669 + hh
->eh
.plt
.offset
);
1671 case R_METAG_HI16_GOTPC
:
1672 case R_METAG_LO16_GOTPC
:
1673 BFD_ASSERT (htab
->sgot
!= NULL
);
1675 relocation
= (htab
->sgot
->output_section
->vma
+
1676 htab
->sgot
->output_offset
);
1677 relocation
+= GOT_REG_OFFSET
;
1678 relocation
-= (input_section
->output_section
->vma
1679 + input_section
->output_offset
1682 case R_METAG_HI16_GOTOFF
:
1683 case R_METAG_LO16_GOTOFF
:
1684 case R_METAG_GETSET_GOTOFF
:
1685 BFD_ASSERT (htab
->sgot
!= NULL
);
1687 relocation
-= (htab
->sgot
->output_section
->vma
+
1688 htab
->sgot
->output_offset
);
1689 relocation
-= GOT_REG_OFFSET
;
1691 case R_METAG_GETSET_GOT
:
1694 bfd_boolean do_got
= 0;
1696 /* Relocation is to the entry for this symbol in the
1697 global offset table. */
1702 off
= hh
->eh
.got
.offset
;
1703 dyn
= htab
->etab
.dynamic_sections_created
;
1704 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
,
1707 /* If we aren't going to call finish_dynamic_symbol,
1708 then we need to handle initialisation of the .got
1709 entry and create needed relocs here. Since the
1710 offset must always be a multiple of 4, we use the
1711 least significant bit to record whether we have
1712 initialised it already. */
1717 hh
->eh
.got
.offset
|= 1;
1724 /* Local symbol case. */
1725 if (local_got_offsets
== NULL
)
1728 off
= local_got_offsets
[r_symndx
];
1730 /* The offset must always be a multiple of 4. We use
1731 the least significant bit to record whether we have
1732 already generated the necessary reloc. */
1737 local_got_offsets
[r_symndx
] |= 1;
1746 /* Output a dynamic relocation for this GOT entry.
1747 In this case it is relative to the base of the
1748 object because the symbol index is zero. */
1749 Elf_Internal_Rela outrel
;
1751 asection
*s
= htab
->srelgot
;
1753 outrel
.r_offset
= (off
1754 + htab
->sgot
->output_offset
1755 + htab
->sgot
->output_section
->vma
);
1756 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1757 outrel
.r_addend
= relocation
;
1759 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1760 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1763 bfd_put_32 (output_bfd
, relocation
,
1764 htab
->sgot
->contents
+ off
);
1767 if (off
>= (bfd_vma
) -2)
1770 relocation
= off
- GOT_REG_OFFSET
;
1773 case R_METAG_TLS_GD
:
1774 case R_METAG_TLS_IE
:
1776 /* XXXMJF There is room here for optimisations. For example
1777 converting from GD->IE, etc. */
1782 if (htab
->sgot
== NULL
)
1789 dyn
= htab
->etab
.dynamic_sections_created
;
1791 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, &hh
->eh
)
1793 || !SYMBOL_REFERENCES_LOCAL (info
, &hh
->eh
)))
1795 indx
= hh
->eh
.dynindx
;
1797 off
= hh
->eh
.got
.offset
;
1798 tls_type
= hh
->tls_type
;
1802 /* Local symbol case. */
1803 if (local_got_offsets
== NULL
)
1806 off
= local_got_offsets
[r_symndx
];
1807 tls_type
= metag_elf_local_got_tls_type (input_bfd
) [r_symndx
];
1810 if (tls_type
== GOT_UNKNOWN
)
1817 bfd_boolean need_relocs
= FALSE
;
1818 Elf_Internal_Rela outrel
;
1819 bfd_byte
*loc
= NULL
;
1822 /* The GOT entries have not been initialized yet. Do it
1823 now, and emit any relocations. If both an IE GOT and a
1824 GD GOT are necessary, we emit the GD first. */
1826 if ((info
->shared
|| indx
!= 0)
1828 || ELF_ST_VISIBILITY (hh
->eh
.other
) == STV_DEFAULT
1829 || hh
->eh
.root
.type
!= bfd_link_hash_undefweak
))
1832 loc
= htab
->srelgot
->contents
;
1833 /* FIXME (CAO): Should this be reloc_count++ ? */
1834 loc
+= htab
->srelgot
->reloc_count
* sizeof (Elf32_External_Rela
);
1837 if (tls_type
& GOT_TLS_GD
)
1841 outrel
.r_offset
= (cur_off
1842 + htab
->sgot
->output_section
->vma
1843 + htab
->sgot
->output_offset
);
1844 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_DTPMOD
);
1845 outrel
.r_addend
= 0;
1846 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ cur_off
);
1848 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1849 htab
->srelgot
->reloc_count
++;
1850 loc
+= sizeof (Elf32_External_Rela
);
1853 bfd_put_32 (output_bfd
, 0,
1854 htab
->sgot
->contents
+ cur_off
+ 4);
1857 bfd_put_32 (output_bfd
, 0,
1858 htab
->sgot
->contents
+ cur_off
+ 4);
1859 outrel
.r_info
= ELF32_R_INFO (indx
,
1860 R_METAG_TLS_DTPOFF
);
1861 outrel
.r_offset
+= 4;
1862 bfd_elf32_swap_reloca_out (output_bfd
,
1864 htab
->srelgot
->reloc_count
++;
1865 loc
+= sizeof (Elf32_External_Rela
);
1870 /* We don't support changing the TLS model. */
1877 if (tls_type
& GOT_TLS_IE
)
1881 outrel
.r_offset
= (cur_off
1882 + htab
->sgot
->output_section
->vma
1883 + htab
->sgot
->output_offset
);
1884 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_TPOFF
);
1887 outrel
.r_addend
= relocation
- dtpoff_base (info
);
1889 outrel
.r_addend
= 0;
1891 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1892 htab
->srelgot
->reloc_count
++;
1893 loc
+= sizeof (Elf32_External_Rela
);
1896 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
1897 htab
->sgot
->contents
+ cur_off
);
1903 hh
->eh
.got
.offset
|= 1;
1905 local_got_offsets
[r_symndx
] |= 1;
1908 /* Add the base of the GOT to the relocation value. */
1909 relocation
= off
- GOT_REG_OFFSET
;
1914 case R_METAG_TLS_IENONPIC_HI16
:
1915 case R_METAG_TLS_IENONPIC_LO16
:
1916 case R_METAG_TLS_LE_HI16
:
1917 case R_METAG_TLS_LE_LO16
:
1920 (*_bfd_error_handler
)
1921 (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"),
1922 input_bfd
, input_section
,
1923 (long) rel
->r_offset
, howto
->name
);
1927 relocation
= tpoff (info
, relocation
);
1929 case R_METAG_TLS_LDO_HI16
:
1930 case R_METAG_TLS_LDO_LO16
:
1932 relocation
= tpoff (info
, relocation
);
1934 relocation
-= dtpoff_base (info
);
1936 case R_METAG_TLS_LDM
:
1940 if (htab
->sgot
== NULL
)
1942 off
= htab
->tls_ldm_got
.offset
;
1947 Elf_Internal_Rela outrel
;
1950 outrel
.r_offset
= (off
1951 + htab
->sgot
->output_section
->vma
1952 + htab
->sgot
->output_offset
);
1954 outrel
.r_addend
= 0;
1955 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_TLS_DTPMOD
);
1956 loc
= htab
->srelgot
->contents
;
1957 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1958 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1959 htab
->tls_ldm_got
.offset
|= 1;
1962 relocation
= off
- GOT_REG_OFFSET
;
1969 r
= metag_final_link_relocate (howto
, input_bfd
, input_section
,
1970 contents
, rel
, relocation
, hh
, htab
,
1973 if (r
!= bfd_reloc_ok
)
1975 const char * msg
= (const char *) NULL
;
1979 case bfd_reloc_overflow
:
1980 r
= info
->callbacks
->reloc_overflow
1981 (info
, (hh
? &hh
->eh
.root
: NULL
), name
, howto
->name
,
1982 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1985 case bfd_reloc_undefined
:
1986 r
= info
->callbacks
->undefined_symbol
1987 (info
, name
, input_bfd
, input_section
, rel
->r_offset
,
1991 case bfd_reloc_outofrange
:
1992 msg
= _("internal error: out of range error");
1995 case bfd_reloc_notsupported
:
1996 msg
= _("internal error: unsupported relocation error");
1999 case bfd_reloc_dangerous
:
2000 msg
= _("internal error: dangerous relocation");
2004 msg
= _("internal error: unknown error");
2009 r
= info
->callbacks
->warning
2010 (info
, msg
, name
, input_bfd
, input_section
, rel
->r_offset
);
2020 /* Create the .plt and .got sections, and set up our hash table
2021 short-cuts to various dynamic sections. */
2024 elf_metag_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
2026 struct elf_metag_link_hash_table
*htab
;
2027 struct elf_link_hash_entry
*eh
;
2028 struct bfd_link_hash_entry
*bh
;
2029 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2031 /* Don't try to create the .plt and .got twice. */
2032 htab
= metag_link_hash_table (info
);
2033 if (htab
->splt
!= NULL
)
2036 /* Call the generic code to do most of the work. */
2037 if (! _bfd_elf_create_dynamic_sections (abfd
, info
))
2040 htab
->sgot
= bfd_get_linker_section (abfd
, ".got");
2044 htab
->sgotplt
= bfd_make_section_with_flags (abfd
, ".got.plt",
2045 (SEC_ALLOC
| SEC_LOAD
|
2048 SEC_LINKER_CREATED
));
2049 if (htab
->sgotplt
== NULL
2050 || !bfd_set_section_alignment (abfd
, htab
->sgotplt
, 2))
2053 /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got
2054 section. We don't do this in the linker script because we don't want
2055 to define the symbol if we are not creating a global offset table. */
2057 if (!(_bfd_generic_link_add_one_symbol
2058 (info
, abfd
, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL
, htab
->sgot
,
2059 (bfd_vma
) 0, NULL
, FALSE
, bed
->collect
, &bh
)))
2061 eh
= (struct elf_link_hash_entry
*) bh
;
2062 eh
->def_regular
= 1;
2063 eh
->type
= STT_OBJECT
;
2064 eh
->other
= STV_HIDDEN
;
2066 if (! info
->executable
2067 && ! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2070 elf_hash_table (info
)->hgot
= eh
;
2072 htab
->splt
= bfd_get_linker_section (abfd
, ".plt");
2073 htab
->srelplt
= bfd_get_linker_section (abfd
, ".rela.plt");
2075 htab
->srelgot
= bfd_get_linker_section (abfd
, ".rela.got");
2077 htab
->sdynbss
= bfd_get_linker_section (abfd
, ".dynbss");
2078 htab
->srelbss
= bfd_get_linker_section (abfd
, ".rela.bss");
2083 /* Look through the relocs for a section during the first phase, and
2084 calculate needed space in the global offset table, procedure linkage
2085 table, and dynamic reloc sections. At this point we haven't
2086 necessarily read all the input files. */
2089 elf_metag_check_relocs (bfd
*abfd
,
2090 struct bfd_link_info
*info
,
2092 const Elf_Internal_Rela
*relocs
)
2094 Elf_Internal_Shdr
*symtab_hdr
;
2095 struct elf_link_hash_entry
**eh_syms
;
2096 const Elf_Internal_Rela
*rel
;
2097 const Elf_Internal_Rela
*rel_end
;
2098 struct elf_metag_link_hash_table
*htab
;
2101 int tls_type
= GOT_UNKNOWN
, old_tls_type
= GOT_UNKNOWN
;
2103 if (info
->relocatable
)
2106 htab
= metag_link_hash_table (info
);
2107 dynobj
= htab
->etab
.dynobj
;
2108 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2109 eh_syms
= elf_sym_hashes (abfd
);
2115 rel_end
= relocs
+ sec
->reloc_count
;
2116 for (rel
= relocs
; rel
< rel_end
; rel
++)
2119 struct elf_metag_link_hash_entry
*hh
;
2120 Elf_Internal_Sym
*isym
;
2121 unsigned long r_symndx
;
2123 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2124 r_type
= ELF32_R_TYPE (rel
->r_info
);
2125 if (r_symndx
< symtab_hdr
->sh_info
)
2127 /* A local symbol. */
2128 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2139 hh
= (struct elf_metag_link_hash_entry
*)
2140 eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
2141 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
2142 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
2143 hh
= (struct elf_metag_link_hash_entry
*) hh
->eh
.root
.u
.i
.link
;
2146 /* Some relocs require a global offset table. */
2147 if (htab
->sgot
== NULL
)
2151 case R_METAG_TLS_GD
:
2152 case R_METAG_TLS_LDM
:
2153 case R_METAG_TLS_IE
:
2155 info
->flags
|= DF_STATIC_TLS
;
2158 case R_METAG_HI16_GOTOFF
:
2159 case R_METAG_LO16_GOTOFF
:
2160 case R_METAG_GETSET_GOTOFF
:
2161 case R_METAG_GETSET_GOT
:
2162 case R_METAG_HI16_GOTPC
:
2163 case R_METAG_LO16_GOTPC
:
2165 htab
->etab
.dynobj
= dynobj
= abfd
;
2166 if (!elf_metag_create_dynamic_sections (dynobj
, info
))
2177 case R_METAG_TLS_IE
:
2178 case R_METAG_TLS_GD
:
2179 case R_METAG_GETSET_GOT
:
2183 tls_type
= GOT_NORMAL
;
2185 case R_METAG_TLS_IE
:
2186 tls_type
= GOT_TLS_IE
;
2188 case R_METAG_TLS_GD
:
2189 tls_type
= GOT_TLS_GD
;
2195 hh
->eh
.got
.refcount
+= 1;
2196 old_tls_type
= hh
->tls_type
;
2200 bfd_signed_vma
*local_got_refcounts
;
2202 /* This is a global offset table entry for a local
2204 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2205 if (local_got_refcounts
== NULL
)
2209 size
= symtab_hdr
->sh_info
;
2210 size
*= sizeof (bfd_signed_vma
);
2211 /* Add in space to store the local GOT TLS types. */
2212 size
+= symtab_hdr
->sh_info
;
2213 local_got_refcounts
= ((bfd_signed_vma
*)
2214 bfd_zalloc (abfd
, size
));
2215 if (local_got_refcounts
== NULL
)
2217 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2218 memset (metag_elf_local_got_tls_type (abfd
),
2219 GOT_UNKNOWN
, symtab_hdr
->sh_info
);
2221 local_got_refcounts
[r_symndx
] += 1;
2222 old_tls_type
= metag_elf_local_got_tls_type (abfd
) [r_symndx
];
2225 if (old_tls_type
!= tls_type
)
2229 hh
->tls_type
= tls_type
;
2233 metag_elf_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2239 case R_METAG_TLS_LDM
:
2240 metag_link_hash_table (info
)->tls_ldm_got
.refcount
+= 1;
2243 case R_METAG_RELBRANCH_PLT
:
2244 /* This symbol requires a procedure linkage table entry. We
2245 actually build the entry in adjust_dynamic_symbol,
2246 because this might be a case of linking PIC code without
2247 linking in any dynamic objects, in which case we don't
2248 need to generate a procedure linkage table after all. */
2250 /* If this is a local symbol, we resolve it directly without
2251 creating a procedure linkage table entry. */
2255 if (hh
->eh
.forced_local
)
2258 hh
->eh
.needs_plt
= 1;
2259 hh
->eh
.plt
.refcount
+= 1;
2262 case R_METAG_HIADDR16
:
2263 case R_METAG_LOADDR16
:
2264 /* Let's help debug shared library creation. These relocs
2265 cannot be used in shared libs. Don't error out for
2266 sections we don't care about, such as debug sections or
2267 non-constant sections. */
2269 && (sec
->flags
& SEC_ALLOC
) != 0
2270 && (sec
->flags
& SEC_READONLY
) != 0)
2275 name
= hh
->eh
.root
.root
.string
;
2277 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
2278 (*_bfd_error_handler
)
2279 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2280 abfd
, elf_metag_howto_table
[r_type
].name
, name
);
2281 bfd_set_error (bfd_error_bad_value
);
2286 case R_METAG_ADDR32
:
2287 case R_METAG_RELBRANCH
:
2288 case R_METAG_GETSETOFF
:
2289 if (hh
!= NULL
&& !info
->shared
)
2291 hh
->eh
.non_got_ref
= 1;
2292 hh
->eh
.plt
.refcount
+= 1;
2295 /* If we are creating a shared library, and this is a reloc
2296 against a global symbol, or a non PC relative reloc
2297 against a local symbol, then we need to copy the reloc
2298 into the shared library. However, if we are linking with
2299 -Bsymbolic, we do not need to copy a reloc against a
2300 global symbol which is defined in an object we are
2301 including in the link (i.e., DEF_REGULAR is set). At
2302 this point we have not seen all the input files, so it is
2303 possible that DEF_REGULAR is not set now but will be set
2304 later (it is never cleared). We account for that
2305 possibility below by storing information in the
2306 dyn_relocs field of the hash table entry. A similar
2307 situation occurs when creating shared libraries and symbol
2308 visibility changes render the symbol local.
2310 If on the other hand, we are creating an executable, we
2311 may need to keep relocations for symbols satisfied by a
2312 dynamic library if we manage to avoid copy relocs for the
2315 && (sec
->flags
& SEC_ALLOC
) != 0
2316 && (r_type
!= R_METAG_RELBRANCH
2318 && (! info
->symbolic
2319 || hh
->eh
.root
.type
== bfd_link_hash_defweak
2320 || !hh
->eh
.def_regular
))))
2322 && (sec
->flags
& SEC_ALLOC
) != 0
2324 && (hh
->eh
.root
.type
== bfd_link_hash_defweak
2325 || !hh
->eh
.def_regular
)))
2327 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2328 struct elf_metag_dyn_reloc_entry
**hdh_head
;
2331 htab
->etab
.dynobj
= dynobj
= abfd
;
2333 /* When creating a shared object, we must copy these
2334 relocs into the output file. We create a reloc
2335 section in dynobj and make room for the reloc. */
2338 sreloc
= _bfd_elf_make_dynamic_reloc_section
2339 (sec
, htab
->etab
.dynobj
, 2, abfd
, /*rela?*/ TRUE
);
2343 bfd_set_error (bfd_error_bad_value
);
2347 elf_section_data (sec
)->sreloc
= sreloc
;
2350 /* If this is a global symbol, we count the number of
2351 relocations we need for this symbol. */
2353 hdh_head
= &((struct elf_metag_link_hash_entry
*) hh
)->dyn_relocs
;
2356 /* Track dynamic relocs needed for local syms too. */
2360 sr
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2364 vpp
= &elf_section_data (sr
)->local_dynrel
;
2365 hdh_head
= (struct elf_metag_dyn_reloc_entry
**) vpp
;
2369 if (hdh_p
== NULL
|| hdh_p
->sec
!= sec
)
2371 hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2372 bfd_alloc (dynobj
, sizeof *hdh_p
));
2375 hdh_p
->hdh_next
= *hdh_head
;
2379 hdh_p
->relative_count
= 0;
2383 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
2384 hdh_p
->relative_count
+= 1;
2388 /* This relocation describes the C++ object vtable hierarchy.
2389 Reconstruct it for later use during GC. */
2390 case R_METAG_GNU_VTINHERIT
:
2391 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, &hh
->eh
,
2396 /* This relocation describes which C++ vtable entries are actually
2397 used. Record for later use during GC. */
2398 case R_METAG_GNU_VTENTRY
:
2399 BFD_ASSERT (hh
!= NULL
);
2401 && !bfd_elf_gc_record_vtentry (abfd
, sec
, &hh
->eh
, rel
->r_addend
))
2410 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2413 elf_metag_copy_indirect_symbol (struct bfd_link_info
*info
,
2414 struct elf_link_hash_entry
*eh_dir
,
2415 struct elf_link_hash_entry
*eh_ind
)
2417 struct elf_metag_link_hash_entry
*hh_dir
, *hh_ind
;
2419 hh_dir
= metag_elf_hash_entry (eh_dir
);
2420 hh_ind
= metag_elf_hash_entry (eh_ind
);
2422 if (hh_ind
->dyn_relocs
!= NULL
)
2424 if (hh_dir
->dyn_relocs
!= NULL
)
2426 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2427 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2429 if (eh_ind
->root
.type
== bfd_link_hash_indirect
)
2432 /* Add reloc counts against the weak sym to the strong sym
2433 list. Merge any entries against the same section. */
2434 for (hdh_pp
= &hh_ind
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2436 struct elf_metag_dyn_reloc_entry
*hdh_q
;
2438 for (hdh_q
= hh_dir
->dyn_relocs
; hdh_q
!= NULL
;
2439 hdh_q
= hdh_q
->hdh_next
)
2440 if (hdh_q
->sec
== hdh_p
->sec
)
2442 hdh_q
->relative_count
+= hdh_p
->relative_count
;
2443 hdh_q
->count
+= hdh_p
->count
;
2444 *hdh_pp
= hdh_p
->hdh_next
;
2448 hdh_pp
= &hdh_p
->hdh_next
;
2450 *hdh_pp
= hh_dir
->dyn_relocs
;
2453 hh_dir
->dyn_relocs
= hh_ind
->dyn_relocs
;
2454 hh_ind
->dyn_relocs
= NULL
;
2457 if (eh_ind
->root
.type
== bfd_link_hash_indirect
2458 && eh_dir
->got
.refcount
<= 0)
2460 hh_dir
->tls_type
= hh_ind
->tls_type
;
2461 hh_ind
->tls_type
= GOT_UNKNOWN
;
2464 _bfd_elf_link_hash_copy_indirect (info
, eh_dir
, eh_ind
);
2467 /* Adjust a symbol defined by a dynamic object and referenced by a
2468 regular object. The current definition is in some section of the
2469 dynamic object, but we're not including those sections. We have to
2470 change the definition to something the rest of the link can
2474 elf_metag_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2475 struct elf_link_hash_entry
*eh
)
2477 struct elf_metag_link_hash_table
*htab
;
2478 struct elf_metag_link_hash_entry
*hh
;
2479 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2482 /* If this is a function, put it in the procedure linkage table. We
2483 will fill in the contents of the procedure linkage table later,
2484 when we know the address of the .got section. */
2485 if (eh
->type
== STT_FUNC
2488 if (eh
->plt
.refcount
<= 0
2489 || SYMBOL_CALLS_LOCAL (info
, eh
)
2490 || (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
2491 && eh
->root
.type
== bfd_link_hash_undefweak
))
2493 /* This case can occur if we saw a PLT reloc in an input
2494 file, but the symbol was never referred to by a dynamic
2495 object. In such a case, we don't actually need to build
2496 a procedure linkage table, and we can just do a PCREL
2498 eh
->plt
.offset
= (bfd_vma
) -1;
2505 eh
->plt
.offset
= (bfd_vma
) -1;
2507 /* If this is a weak symbol, and there is a real definition, the
2508 processor independent code will have arranged for us to see the
2509 real definition first, and we can just use the same value. */
2510 if (eh
->u
.weakdef
!= NULL
)
2512 if (eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defined
2513 && eh
->u
.weakdef
->root
.type
!= bfd_link_hash_defweak
)
2515 eh
->root
.u
.def
.section
= eh
->u
.weakdef
->root
.u
.def
.section
;
2516 eh
->root
.u
.def
.value
= eh
->u
.weakdef
->root
.u
.def
.value
;
2517 eh
->non_got_ref
= eh
->u
.weakdef
->non_got_ref
;
2521 /* This is a reference to a symbol defined by a dynamic object which
2522 is not a function. */
2524 /* If we are creating a shared library, we must presume that the
2525 only references to the symbol are via the global offset table.
2526 For such cases we need not do anything here; the relocations will
2527 be handled correctly by relocate_section. */
2531 /* If there are no references to this symbol that do not use the
2532 GOT, we don't need to generate a copy reloc. */
2533 if (!eh
->non_got_ref
)
2536 /* If -z nocopyreloc was given, we won't generate them either. */
2537 if (info
->nocopyreloc
)
2539 eh
->non_got_ref
= 0;
2543 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2544 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2546 s
= hdh_p
->sec
->output_section
;
2547 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2551 /* If we didn't find any dynamic relocs in read-only sections, then
2552 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2555 eh
->non_got_ref
= 0;
2559 /* We must allocate the symbol in our .dynbss section, which will
2560 become part of the .bss section of the executable. There will be
2561 an entry for this symbol in the .dynsym section. The dynamic
2562 object will contain position independent code, so all references
2563 from the dynamic object to this symbol will go through the global
2564 offset table. The dynamic linker will use the .dynsym entry to
2565 determine the address it must put in the global offset table, so
2566 both the dynamic object and the regular object will refer to the
2567 same memory location for the variable. */
2569 htab
= metag_link_hash_table (info
);
2571 /* We must generate a COPY reloc to tell the dynamic linker to
2572 copy the initial value out of the dynamic object and into the
2573 runtime process image. */
2574 if ((eh
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && eh
->size
!= 0)
2576 htab
->srelbss
->size
+= sizeof (Elf32_External_Rela
);
2582 return _bfd_elf_adjust_dynamic_copy (eh
, s
);
2585 /* Allocate space in .plt, .got and associated reloc sections for
2589 allocate_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2591 struct bfd_link_info
*info
;
2592 struct elf_metag_link_hash_table
*htab
;
2593 struct elf_metag_link_hash_entry
*hh
;
2594 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2596 if (eh
->root
.type
== bfd_link_hash_indirect
)
2599 if (eh
->root
.type
== bfd_link_hash_warning
)
2600 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2603 htab
= metag_link_hash_table (info
);
2605 if (htab
->etab
.dynamic_sections_created
2606 && eh
->plt
.refcount
> 0)
2608 /* Make sure this symbol is output as a dynamic symbol.
2609 Undefined weak syms won't yet be marked as dynamic. */
2610 if (eh
->dynindx
== -1
2611 && !eh
->forced_local
)
2613 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2617 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
->shared
, eh
))
2619 asection
*s
= htab
->splt
;
2621 /* If this is the first .plt entry, make room for the special
2624 s
->size
+= PLT_ENTRY_SIZE
;
2626 eh
->plt
.offset
= s
->size
;
2628 /* If this symbol is not defined in a regular file, and we are
2629 not generating a shared library, then set the symbol to this
2630 location in the .plt. This is required to make function
2631 pointers compare as equal between the normal executable and
2632 the shared library. */
2634 && !eh
->def_regular
)
2636 eh
->root
.u
.def
.section
= s
;
2637 eh
->root
.u
.def
.value
= eh
->plt
.offset
;
2640 /* Make room for this entry. */
2641 s
->size
+= PLT_ENTRY_SIZE
;
2643 /* We also need to make an entry in the .got.plt section, which
2644 will be placed in the .got section by the linker script. */
2645 htab
->sgotplt
->size
+= 4;
2647 /* We also need to make an entry in the .rel.plt section. */
2648 htab
->srelplt
->size
+= sizeof (Elf32_External_Rela
);
2652 eh
->plt
.offset
= (bfd_vma
) -1;
2658 eh
->plt
.offset
= (bfd_vma
) -1;
2662 if (eh
->got
.refcount
> 0)
2666 int tls_type
= metag_elf_hash_entry (eh
)->tls_type
;
2668 /* Make sure this symbol is output as a dynamic symbol.
2669 Undefined weak syms won't yet be marked as dynamic. */
2670 if (eh
->dynindx
== -1
2671 && !eh
->forced_local
)
2673 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2679 eh
->got
.offset
= s
->size
;
2681 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2682 if (tls_type
== GOT_TLS_GD
)
2684 dyn
= htab
->etab
.dynamic_sections_created
;
2685 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2686 R_METAG_TLS_GD needs one if local symbol and two if global. */
2687 if ((tls_type
== GOT_TLS_GD
&& eh
->dynindx
== -1)
2688 || (tls_type
== GOT_TLS_IE
&& dyn
))
2689 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2690 else if (tls_type
== GOT_TLS_GD
)
2691 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rela
);
2692 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, eh
))
2693 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2696 eh
->got
.offset
= (bfd_vma
) -1;
2698 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2699 if (hh
->dyn_relocs
== NULL
)
2702 /* If this is a -Bsymbolic shared link, then we need to discard all
2703 space allocated for dynamic pc-relative relocs against symbols
2704 defined in a regular object. For the normal shared case, discard
2705 space for relocs that have become local due to symbol visibility
2709 if (SYMBOL_CALLS_LOCAL (info
, eh
))
2711 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
2713 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2715 hdh_p
->count
-= hdh_p
->relative_count
;
2716 hdh_p
->relative_count
= 0;
2717 if (hdh_p
->count
== 0)
2718 *hdh_pp
= hdh_p
->hdh_next
;
2720 hdh_pp
= &hdh_p
->hdh_next
;
2724 /* Also discard relocs on undefined weak syms with non-default
2726 if (hh
->dyn_relocs
!= NULL
2727 && eh
->root
.type
== bfd_link_hash_undefweak
)
2729 if (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
)
2730 hh
->dyn_relocs
= NULL
;
2732 /* Make sure undefined weak symbols are output as a dynamic
2734 else if (eh
->dynindx
== -1
2735 && !eh
->forced_local
)
2737 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2744 /* For the non-shared case, discard space for relocs against
2745 symbols which turn out to need copy relocs or are not
2747 if (!eh
->non_got_ref
2748 && ((eh
->def_dynamic
2749 && !eh
->def_regular
)
2750 || (htab
->etab
.dynamic_sections_created
2751 && (eh
->root
.type
== bfd_link_hash_undefweak
2752 || eh
->root
.type
== bfd_link_hash_undefined
))))
2754 /* Make sure this symbol is output as a dynamic symbol.
2755 Undefined weak syms won't yet be marked as dynamic. */
2756 if (eh
->dynindx
== -1
2757 && !eh
->forced_local
)
2759 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2763 /* If that succeeded, we know we'll be keeping all the
2765 if (eh
->dynindx
!= -1)
2769 hh
->dyn_relocs
= NULL
;
2775 /* Finally, allocate space. */
2776 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2778 asection
*sreloc
= elf_section_data (hdh_p
->sec
)->sreloc
;
2779 sreloc
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2785 /* Find any dynamic relocs that apply to read-only sections. */
2788 readonly_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2790 struct elf_metag_link_hash_entry
*hh
;
2791 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2793 if (eh
->root
.type
== bfd_link_hash_warning
)
2794 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2796 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2797 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->hdh_next
)
2799 asection
*s
= hdh_p
->sec
->output_section
;
2801 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2803 struct bfd_link_info
*info
= inf
;
2805 info
->flags
|= DF_TEXTREL
;
2807 /* Not an error, just cut short the traversal. */
2814 /* Set the sizes of the dynamic sections. */
2817 elf_metag_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2818 struct bfd_link_info
*info
)
2820 struct elf_metag_link_hash_table
*htab
;
2826 htab
= metag_link_hash_table (info
);
2827 dynobj
= htab
->etab
.dynobj
;
2831 if (htab
->etab
.dynamic_sections_created
)
2833 /* Set the contents of the .interp section to the interpreter. */
2834 if (info
->executable
)
2836 s
= bfd_get_linker_section (dynobj
, ".interp");
2839 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2840 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2844 /* Set up .got offsets for local syms, and space for local dynamic
2846 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2848 bfd_signed_vma
*local_got
;
2849 bfd_signed_vma
*end_local_got
;
2850 bfd_size_type locsymcount
;
2851 Elf_Internal_Shdr
*symtab_hdr
;
2853 char *local_tls_type
;
2855 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2858 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2860 struct elf_metag_dyn_reloc_entry
*hdh_p
;
2862 for (hdh_p
= ((struct elf_metag_dyn_reloc_entry
*)
2863 elf_section_data (s
)->local_dynrel
);
2865 hdh_p
= hdh_p
->hdh_next
)
2867 if (!bfd_is_abs_section (hdh_p
->sec
)
2868 && bfd_is_abs_section (hdh_p
->sec
->output_section
))
2870 /* Input section has been discarded, either because
2871 it is a copy of a linkonce section or due to
2872 linker script /DISCARD/, so we'll be discarding
2875 else if (hdh_p
->count
!= 0)
2877 srel
= elf_section_data (hdh_p
->sec
)->sreloc
;
2878 srel
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2879 if ((hdh_p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2880 info
->flags
|= DF_TEXTREL
;
2885 local_got
= elf_local_got_refcounts (ibfd
);
2889 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2890 locsymcount
= symtab_hdr
->sh_info
;
2891 end_local_got
= local_got
+ locsymcount
;
2892 local_tls_type
= metag_elf_local_got_tls_type (ibfd
);
2894 srel
= htab
->srelgot
;
2895 for (; local_got
< end_local_got
; ++local_got
)
2899 *local_got
= s
->size
;
2900 s
->size
+= GOT_ENTRY_SIZE
;
2901 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2902 if (*local_tls_type
== GOT_TLS_GD
)
2905 srel
->size
+= sizeof (Elf32_External_Rela
);
2908 *local_got
= (bfd_vma
) -1;
2913 if (htab
->tls_ldm_got
.refcount
> 0)
2915 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2917 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2918 htab
->sgot
->size
+= 8;
2919 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
2922 htab
->tls_ldm_got
.offset
= -1;
2924 /* Allocate global sym .plt and .got entries, and space for global
2925 sym dynamic relocs. */
2926 elf_link_hash_traverse (&htab
->etab
, allocate_dynrelocs
, info
);
2928 /* We now have determined the sizes of the various dynamic sections.
2929 Allocate memory for them. */
2931 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2933 bfd_boolean reloc_section
= FALSE
;
2935 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2940 || s
== htab
->sgotplt
2941 || s
== htab
->sdynbss
)
2943 /* Strip this section if we don't need it; see the
2946 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2948 if (s
->size
!= 0 && s
!= htab
->srelplt
)
2951 /* We use the reloc_count field as a counter if we need
2952 to copy relocs into the output file. */
2954 reloc_section
= TRUE
;
2958 /* It's not one of our sections, so don't allocate space. */
2964 /* If we don't need this section, strip it from the
2965 output file. This is mostly to handle .rela.bss and
2966 .rela.plt. We must create both sections in
2967 create_dynamic_sections, because they must be created
2968 before the linker maps input sections to output
2969 sections. The linker does that before
2970 adjust_dynamic_symbol is called, and it is that
2971 function which decides whether anything needs to go
2972 into these sections. */
2973 s
->flags
|= SEC_EXCLUDE
;
2977 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2980 /* Allocate memory for the section contents. */
2981 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2982 if (s
->contents
== NULL
)
2984 else if (reloc_section
)
2986 unsigned char *contents
= s
->contents
;
2987 Elf32_External_Rela reloc
;
2989 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2990 memset(&reloc
, 0, sizeof(Elf32_External_Rela
));
2991 reloc
.r_info
[0] = R_METAG_NONE
;
2992 for (; contents
< (s
->contents
+ s
->size
);
2993 contents
+= sizeof(Elf32_External_Rela
))
2995 memcpy(contents
, &reloc
, sizeof(Elf32_External_Rela
));
3000 if (htab
->etab
.dynamic_sections_created
)
3002 /* Add some entries to the .dynamic section. We fill in the
3003 values later, in elf_metag_finish_dynamic_sections, but we
3004 must add the entries now so that we get the correct size for
3005 the .dynamic section. The DT_DEBUG entry is filled in by the
3006 dynamic linker and used by the debugger. */
3007 #define add_dynamic_entry(TAG, VAL) \
3008 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3010 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3013 if (info
->executable
)
3015 if (!add_dynamic_entry (DT_DEBUG
, 0))
3019 if (htab
->srelplt
->size
!= 0)
3021 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3022 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3023 || !add_dynamic_entry (DT_JMPREL
, 0))
3029 if (!add_dynamic_entry (DT_RELA
, 0)
3030 || !add_dynamic_entry (DT_RELASZ
, 0)
3031 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3034 /* If any dynamic relocs apply to a read-only section,
3035 then we need a DT_TEXTREL entry. */
3036 if ((info
->flags
& DF_TEXTREL
) == 0)
3037 elf_link_hash_traverse (&htab
->etab
, readonly_dynrelocs
, info
);
3039 if ((info
->flags
& DF_TEXTREL
) != 0)
3041 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3046 #undef add_dynamic_entry
3051 /* Finish up dynamic symbol handling. We set the contents of various
3052 dynamic sections here. */
3055 elf_metag_finish_dynamic_symbol (bfd
*output_bfd
,
3056 struct bfd_link_info
*info
,
3057 struct elf_link_hash_entry
*eh
,
3058 Elf_Internal_Sym
*sym
)
3060 struct elf_metag_link_hash_table
*htab
;
3061 Elf_Internal_Rela rel
;
3064 htab
= metag_link_hash_table (info
);
3066 if (eh
->plt
.offset
!= (bfd_vma
) -1)
3076 if (eh
->plt
.offset
& 1)
3079 BFD_ASSERT (eh
->dynindx
!= -1);
3082 sgot
= htab
->sgotplt
;
3083 srela
= htab
->srelplt
;
3084 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
3086 /* Get the index in the procedure linkage table which
3087 corresponds to this symbol. This is the index of this symbol
3088 in all the symbols for which we are making plt entries. The
3089 first entry in the procedure linkage table is reserved. */
3090 plt_index
= eh
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3092 /* Get the offset into the .got.plt table of the entry that
3093 corresponds to this function. */
3094 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3096 BFD_ASSERT (got_offset
< (1 << 16));
3098 got_entry
= sgot
->output_section
->vma
3099 + sgot
->output_offset
3102 BFD_ASSERT (plt_index
< (1 << 16));
3104 /* Fill in the entry in the procedure linkage table. */
3107 bfd_put_32 (output_bfd
,
3109 | (((got_entry
>> 16) & 0xffff) << 3)),
3110 splt
->contents
+ eh
->plt
.offset
);
3111 bfd_put_32 (output_bfd
,
3113 | ((got_entry
& 0xffff) << 3)),
3114 splt
->contents
+ eh
->plt
.offset
+ 4);
3115 bfd_put_32 (output_bfd
, plt_entry
[2],
3116 splt
->contents
+ eh
->plt
.offset
+ 8);
3117 bfd_put_32 (output_bfd
,
3118 (plt_entry
[3] | (plt_index
<< 3)),
3119 splt
->contents
+ eh
->plt
.offset
+ 12);
3120 bfd_put_32 (output_bfd
,
3122 | ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3123 splt
->contents
+ eh
->plt
.offset
+ 16);
3127 bfd_vma addr
= got_entry
- (splt
->output_section
->vma
+
3128 splt
->output_offset
+ eh
->plt
.offset
);
3130 bfd_put_32 (output_bfd
,
3131 plt_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3132 splt
->contents
+ eh
->plt
.offset
);
3133 bfd_put_32 (output_bfd
,
3134 plt_pic_entry
[1] | ((addr
& 0xffff) << 3),
3135 splt
->contents
+ eh
->plt
.offset
+ 4);
3136 bfd_put_32 (output_bfd
, plt_pic_entry
[2],
3137 splt
->contents
+ eh
->plt
.offset
+ 8);
3138 bfd_put_32 (output_bfd
,
3139 (plt_pic_entry
[3] | (plt_index
<< 3)),
3140 splt
->contents
+ eh
->plt
.offset
+ 12);
3141 bfd_put_32 (output_bfd
,
3143 + ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3144 splt
->contents
+ eh
->plt
.offset
+ 16);
3147 /* Fill in the entry in the global offset table. */
3148 bfd_put_32 (output_bfd
,
3149 (splt
->output_section
->vma
3150 + splt
->output_offset
3152 + 12), /* offset within PLT entry */
3153 sgot
->contents
+ got_offset
);
3155 /* Fill in the entry in the .rela.plt section. */
3156 rel
.r_offset
= (sgot
->output_section
->vma
3157 + sgot
->output_offset
3159 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_JMP_SLOT
);
3161 loc
= htab
->srelplt
->contents
;
3162 loc
+= plt_index
* sizeof(Elf32_External_Rela
);
3163 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3165 if (!eh
->def_regular
)
3167 /* Mark the symbol as undefined, rather than as defined in
3168 the .plt section. Leave the value alone. */
3169 sym
->st_shndx
= SHN_UNDEF
;
3173 if (eh
->got
.offset
!= (bfd_vma
) -1
3174 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_GD
) == 0
3175 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_IE
) == 0)
3177 /* This symbol has an entry in the global offset table. Set it
3180 rel
.r_offset
= ((eh
->got
.offset
&~ (bfd_vma
) 1)
3181 + htab
->sgot
->output_offset
3182 + htab
->sgot
->output_section
->vma
);
3184 /* If this is a -Bsymbolic link and the symbol is defined
3185 locally or was forced to be local because of a version file,
3186 we just want to emit a RELATIVE reloc. The entry in the
3187 global offset table will already have been initialized in the
3188 relocate_section function. */
3190 && (info
->symbolic
|| eh
->dynindx
== -1)
3193 rel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
3194 rel
.r_addend
= (eh
->root
.u
.def
.value
3195 + eh
->root
.u
.def
.section
->output_offset
3196 + eh
->root
.u
.def
.section
->output_section
->vma
);
3200 if ((eh
->got
.offset
& 1) != 0)
3202 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ eh
->got
.offset
);
3203 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_GLOB_DAT
);
3207 loc
= htab
->srelgot
->contents
;
3208 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3209 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3216 /* This symbol needs a copy reloc. Set it up. */
3218 if (! (eh
->dynindx
!= -1
3219 && (eh
->root
.type
== bfd_link_hash_defined
3220 || eh
->root
.type
== bfd_link_hash_defweak
)))
3225 rel
.r_offset
= (eh
->root
.u
.def
.value
3226 + eh
->root
.u
.def
.section
->output_offset
3227 + eh
->root
.u
.def
.section
->output_section
->vma
);
3229 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_COPY
);
3230 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3231 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3234 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3235 if (eh
->root
.root
.string
[0] == '_'
3236 && (strcmp (eh
->root
.root
.string
, "_DYNAMIC") == 0
3237 || eh
== htab
->etab
.hgot
))
3239 sym
->st_shndx
= SHN_ABS
;
3245 /* Set the Meta ELF ABI version. */
3248 elf_metag_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
)
3250 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
3252 i_ehdrp
= elf_elfheader (abfd
);
3253 i_ehdrp
->e_ident
[EI_ABIVERSION
] = METAG_ELF_ABI_VERSION
;
3256 /* Used to decide how to sort relocs in an optimal manner for the
3257 dynamic linker, before writing them out. */
3259 static enum elf_reloc_type_class
3260 elf_metag_reloc_type_class (const Elf_Internal_Rela
*rela
)
3262 switch ((int) ELF32_R_TYPE (rela
->r_info
))
3264 case R_METAG_RELATIVE
:
3265 return reloc_class_relative
;
3266 case R_METAG_JMP_SLOT
:
3267 return reloc_class_plt
;
3269 return reloc_class_copy
;
3271 return reloc_class_normal
;
3275 /* Finish up the dynamic sections. */
3278 elf_metag_finish_dynamic_sections (bfd
*output_bfd
,
3279 struct bfd_link_info
*info
)
3282 struct elf_metag_link_hash_table
*htab
;
3285 htab
= metag_link_hash_table (info
);
3286 dynobj
= htab
->etab
.dynobj
;
3288 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3290 if (htab
->etab
.dynamic_sections_created
)
3293 Elf32_External_Dyn
*dyncon
, *dynconend
;
3298 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3299 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3300 for (; dyncon
< dynconend
; dyncon
++)
3302 Elf_Internal_Dyn dyn
;
3305 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3313 s
= htab
->sgot
->output_section
;
3314 BFD_ASSERT (s
!= NULL
);
3315 dyn
.d_un
.d_ptr
= s
->vma
+ htab
->sgot
->output_offset
;
3316 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3320 s
= htab
->srelplt
->output_section
;
3321 BFD_ASSERT (s
!= NULL
);
3322 dyn
.d_un
.d_ptr
= s
->vma
;
3323 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3328 dyn
.d_un
.d_val
= s
->size
;
3329 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3333 /* Don't count procedure linkage table relocs in the
3334 overall reloc count. */
3335 if (htab
->srelplt
) {
3337 dyn
.d_un
.d_val
-= s
->size
;
3339 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3343 /* We may not be using the standard ELF linker script.
3344 If .rela.plt is the first .rela section, we adjust
3345 DT_RELA to not include it. */
3346 if (htab
->srelplt
) {
3348 if (dyn
.d_un
.d_ptr
== s
->output_section
->vma
+ s
->output_offset
)
3349 dyn
.d_un
.d_ptr
+= s
->size
;
3351 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3357 /* Fill in the first entry in the procedure linkage table. */
3359 if (splt
&& splt
->size
> 0)
3362 /* addr = .got + 4 */
3363 addr
= htab
->sgot
->output_section
->vma
+
3364 htab
->sgot
->output_offset
+ 4;
3367 addr
-= splt
->output_section
->vma
+ splt
->output_offset
;
3368 bfd_put_32 (output_bfd
,
3369 plt0_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3371 bfd_put_32 (output_bfd
,
3372 plt0_pic_entry
[1] | ((addr
& 0xffff) << 3),
3373 splt
->contents
+ 4);
3374 bfd_put_32 (output_bfd
, plt0_pic_entry
[2], splt
->contents
+ 8);
3375 bfd_put_32 (output_bfd
, plt0_pic_entry
[3], splt
->contents
+ 12);
3376 bfd_put_32 (output_bfd
, plt0_pic_entry
[4], splt
->contents
+ 16);
3380 bfd_put_32 (output_bfd
,
3381 plt0_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3383 bfd_put_32 (output_bfd
,
3384 plt0_entry
[1] | ((addr
& 0xffff) << 3),
3385 splt
->contents
+ 4);
3386 bfd_put_32 (output_bfd
, plt0_entry
[2], splt
->contents
+ 8);
3387 bfd_put_32 (output_bfd
, plt0_entry
[3], splt
->contents
+ 12);
3388 bfd_put_32 (output_bfd
, plt0_entry
[4], splt
->contents
+ 16);
3391 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
=
3396 if (htab
->sgot
!= NULL
&& htab
->sgot
->size
!= 0)
3398 /* Fill in the first entry in the global offset table.
3399 We use it to point to our dynamic section, if we have one. */
3400 bfd_put_32 (output_bfd
,
3401 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0,
3402 htab
->sgot
->contents
);
3404 /* The second entry is reserved for use by the dynamic linker. */
3405 memset (htab
->sgot
->contents
+ GOT_ENTRY_SIZE
, 0, GOT_ENTRY_SIZE
);
3407 /* Set .got entry size. */
3408 elf_section_data (htab
->sgot
->output_section
)
3409 ->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3415 /* Return the section that should be marked against GC for a given
3419 elf_metag_gc_mark_hook (asection
*sec
,
3420 struct bfd_link_info
*info
,
3421 Elf_Internal_Rela
*rela
,
3422 struct elf_link_hash_entry
*hh
,
3423 Elf_Internal_Sym
*sym
)
3426 switch ((unsigned int) ELF32_R_TYPE (rela
->r_info
))
3428 case R_METAG_GNU_VTINHERIT
:
3429 case R_METAG_GNU_VTENTRY
:
3433 return _bfd_elf_gc_mark_hook (sec
, info
, rela
, hh
, sym
);
3436 /* Update the got and plt entry reference counts for the section being
3440 elf_metag_gc_sweep_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
3441 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3442 asection
*sec ATTRIBUTE_UNUSED
,
3443 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
3445 Elf_Internal_Shdr
*symtab_hdr
;
3446 struct elf_link_hash_entry
**eh_syms
;
3447 bfd_signed_vma
*local_got_refcounts
;
3448 bfd_signed_vma
*local_plt_refcounts
;
3449 const Elf_Internal_Rela
*rel
, *relend
;
3451 if (info
->relocatable
)
3454 elf_section_data (sec
)->local_dynrel
= NULL
;
3456 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3457 eh_syms
= elf_sym_hashes (abfd
);
3458 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3459 local_plt_refcounts
= local_got_refcounts
;
3460 if (local_plt_refcounts
!= NULL
)
3461 local_plt_refcounts
+= symtab_hdr
->sh_info
;
3463 relend
= relocs
+ sec
->reloc_count
;
3464 for (rel
= relocs
; rel
< relend
; rel
++)
3466 unsigned long r_symndx
;
3467 unsigned int r_type
;
3468 struct elf_link_hash_entry
*eh
= NULL
;
3470 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3471 if (r_symndx
>= symtab_hdr
->sh_info
)
3473 struct elf_metag_link_hash_entry
*hh
;
3474 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3475 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3477 eh
= eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
3478 while (eh
->root
.type
== bfd_link_hash_indirect
3479 || eh
->root
.type
== bfd_link_hash_warning
)
3480 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
3481 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3483 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3484 hdh_pp
= &hdh_p
->hdh_next
)
3485 if (hdh_p
->sec
== sec
)
3487 /* Everything must go for SEC. */
3488 *hdh_pp
= hdh_p
->hdh_next
;
3493 r_type
= ELF32_R_TYPE (rel
->r_info
);
3496 case R_METAG_TLS_LDM
:
3497 if (metag_link_hash_table (info
)->tls_ldm_got
.refcount
> 0)
3498 metag_link_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
3500 case R_METAG_TLS_IE
:
3501 case R_METAG_TLS_GD
:
3502 case R_METAG_GETSET_GOT
:
3505 if (eh
->got
.refcount
> 0)
3506 eh
->got
.refcount
-= 1;
3508 else if (local_got_refcounts
!= NULL
)
3510 if (local_got_refcounts
[r_symndx
] > 0)
3511 local_got_refcounts
[r_symndx
] -= 1;
3515 case R_METAG_RELBRANCH_PLT
:
3518 if (eh
->plt
.refcount
> 0)
3519 eh
->plt
.refcount
-= 1;
3523 case R_METAG_ADDR32
:
3524 case R_METAG_HIADDR16
:
3525 case R_METAG_LOADDR16
:
3526 case R_METAG_GETSETOFF
:
3527 case R_METAG_RELBRANCH
:
3530 struct elf_metag_link_hash_entry
*hh
;
3531 struct elf_metag_dyn_reloc_entry
**hdh_pp
;
3532 struct elf_metag_dyn_reloc_entry
*hdh_p
;
3534 if (!info
->shared
&& eh
->plt
.refcount
> 0)
3535 eh
->plt
.refcount
-= 1;
3537 hh
= (struct elf_metag_link_hash_entry
*) eh
;
3539 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
;
3540 hdh_pp
= &hdh_p
->hdh_next
)
3541 if (hdh_p
->sec
== sec
)
3543 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
3544 hdh_p
->relative_count
-= 1;
3546 if (hdh_p
->count
== 0)
3547 *hdh_pp
= hdh_p
->hdh_next
;
3561 /* Determine the type of stub needed, if any, for a call. */
3563 static enum elf_metag_stub_type
3564 metag_type_of_stub (asection
*input_sec
,
3565 const Elf_Internal_Rela
*rel
,
3566 struct elf_metag_link_hash_entry
*hh
,
3567 bfd_vma destination
,
3568 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3571 bfd_vma branch_offset
;
3572 bfd_vma max_branch_offset
;
3575 !(hh
->eh
.root
.type
== bfd_link_hash_defined
3576 || hh
->eh
.root
.type
== bfd_link_hash_defweak
))
3577 return metag_stub_none
;
3579 /* Determine where the call point is. */
3580 location
= (input_sec
->output_offset
3581 + input_sec
->output_section
->vma
3584 branch_offset
= destination
- location
;
3586 /* Determine if a long branch stub is needed. Meta branch offsets
3587 are signed 19 bits 4 byte aligned. */
3588 max_branch_offset
= (1 << (BRANCH_BITS
-1)) << 2;
3590 if (branch_offset
+ max_branch_offset
>= 2*max_branch_offset
)
3593 return metag_stub_long_branch_shared
;
3595 return metag_stub_long_branch
;
3598 return metag_stub_none
;
3601 #define MOVT_A0_3 0x82180005
3602 #define JUMP_A0_3 0xac180003
3604 #define MOVT_A1LBP 0x83080005
3605 #define ADD_A1LBP 0x83080000
3607 #define ADDT_A0_3_CPC 0x82980001
3608 #define ADD_A0_3_A0_3 0x82180000
3609 #define MOV_PC_A0_3 0xa3180ca0
3612 metag_build_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3614 struct elf_metag_stub_hash_entry
*hsh
;
3621 /* Massage our args to the form they really have. */
3622 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3624 stub_sec
= hsh
->stub_sec
;
3626 /* Make a note of the offset within the stubs for this entry. */
3627 hsh
->stub_offset
= stub_sec
->size
;
3628 loc
= stub_sec
->contents
+ hsh
->stub_offset
;
3630 stub_bfd
= stub_sec
->owner
;
3632 switch (hsh
->stub_type
)
3634 case metag_stub_long_branch_shared
:
3635 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3636 calculate the jump target using A0.3 as a temporary. Then a MOV
3637 to PC carries out the jump. */
3638 sym_value
= (hsh
->target_value
3639 + hsh
->target_section
->output_offset
3640 + hsh
->target_section
->output_section
->vma
3643 sym_value
-= (hsh
->stub_offset
3644 + stub_sec
->output_offset
3645 + stub_sec
->output_section
->vma
);
3647 bfd_put_32 (stub_bfd
, ADDT_A0_3_CPC
| (((sym_value
>> 16) & 0xffff) << 3),
3650 bfd_put_32 (stub_bfd
, ADD_A0_3_A0_3
| ((sym_value
& 0xffff) << 3),
3653 bfd_put_32 (stub_bfd
, MOV_PC_A0_3
, loc
+ 8);
3657 case metag_stub_long_branch
:
3658 /* A standard long branch stub is a MOVT instruction followed by a
3659 JUMP instruction using the A0.3 register as a temporary. This is
3660 the same method used by the LDLK linker (patch.c). */
3661 sym_value
= (hsh
->target_value
3662 + hsh
->target_section
->output_offset
3663 + hsh
->target_section
->output_section
->vma
3666 bfd_put_32 (stub_bfd
, MOVT_A0_3
| (((sym_value
>> 16) & 0xffff) << 3),
3669 bfd_put_32 (stub_bfd
, JUMP_A0_3
| ((sym_value
& 0xffff) << 3), loc
+ 4);
3678 stub_sec
->size
+= size
;
3682 /* As above, but don't actually build the stub. Just bump offset so
3683 we know stub section sizes. */
3686 metag_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3688 struct elf_metag_stub_hash_entry
*hsh
;
3691 /* Massage our args to the form they really have. */
3692 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3694 if (hsh
->stub_type
== metag_stub_long_branch
)
3696 else if (hsh
->stub_type
== metag_stub_long_branch_shared
)
3699 hsh
->stub_sec
->size
+= size
;
3703 /* Set up various things so that we can make a list of input sections
3704 for each output section included in the link. Returns -1 on error,
3705 0 when no stubs will be needed, and 1 on success. */
3708 elf_metag_setup_section_lists (bfd
*output_bfd
, struct bfd_link_info
*info
)
3711 unsigned int bfd_count
;
3712 int top_id
, top_index
;
3714 asection
**input_list
, **list
;
3716 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3718 /* Count the number of input BFDs and find the top input section id. */
3719 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3721 input_bfd
= input_bfd
->link_next
)
3724 for (section
= input_bfd
->sections
;
3726 section
= section
->next
)
3728 if (top_id
< section
->id
)
3729 top_id
= section
->id
;
3733 htab
->bfd_count
= bfd_count
;
3735 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3736 htab
->stub_group
= bfd_zmalloc (amt
);
3737 if (htab
->stub_group
== NULL
)
3740 /* We can't use output_bfd->section_count here to find the top output
3741 section index as some sections may have been removed, and
3742 strip_excluded_output_sections doesn't renumber the indices. */
3743 for (section
= output_bfd
->sections
, top_index
= 0;
3745 section
= section
->next
)
3747 if (top_index
< section
->index
)
3748 top_index
= section
->index
;
3751 htab
->top_index
= top_index
;
3752 amt
= sizeof (asection
*) * (top_index
+ 1);
3753 input_list
= bfd_malloc (amt
);
3754 htab
->input_list
= input_list
;
3755 if (input_list
== NULL
)
3758 /* For sections we aren't interested in, mark their entries with a
3759 value we can check later. */
3760 list
= input_list
+ top_index
;
3762 *list
= bfd_abs_section_ptr
;
3763 while (list
-- != input_list
);
3765 for (section
= output_bfd
->sections
;
3767 section
= section
->next
)
3769 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3770 * have PC relative relocs in them but no code flag set. */
3771 if (((section
->flags
& SEC_CODE
) != 0) ||
3772 strcmp(".ctors", section
->name
) ||
3773 strcmp(".dtors", section
->name
))
3774 input_list
[section
->index
] = NULL
;
3780 /* The linker repeatedly calls this function for each input section,
3781 in the order that input sections are linked into output sections.
3782 Build lists of input sections to determine groupings between which
3783 we may insert linker stubs. */
3786 elf_metag_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3788 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3790 if (isec
->output_section
->index
<= htab
->top_index
)
3792 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3793 if (*list
!= bfd_abs_section_ptr
)
3795 /* Steal the link_sec pointer for our list. */
3796 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3797 /* This happens to make the list in reverse order,
3798 which is what we want. */
3799 PREV_SEC (isec
) = *list
;
3805 /* See whether we can group stub sections together. Grouping stub
3806 sections may result in fewer stubs. More importantly, we need to
3807 put all .init* and .fini* stubs at the beginning of the .init or
3808 .fini output sections respectively, because glibc splits the
3809 _init and _fini functions into multiple parts. Putting a stub in
3810 the middle of a function is not a good idea. */
3813 group_sections (struct elf_metag_link_hash_table
*htab
,
3814 bfd_size_type stub_group_size
,
3815 bfd_boolean stubs_always_before_branch
)
3817 asection
**list
= htab
->input_list
+ htab
->top_index
;
3820 asection
*tail
= *list
;
3821 if (tail
== bfd_abs_section_ptr
)
3823 while (tail
!= NULL
)
3827 bfd_size_type total
;
3828 bfd_boolean big_sec
;
3832 big_sec
= total
>= stub_group_size
;
3834 while ((prev
= PREV_SEC (curr
)) != NULL
3835 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3839 /* OK, the size from the start of CURR to the end is less
3840 than stub_group_size bytes and thus can be handled by one stub
3841 section. (or the tail section is itself larger than
3842 stub_group_size bytes, in which case we may be toast.)
3843 We should really be keeping track of the total size of
3844 stubs added here, as stubs contribute to the final output
3848 prev
= PREV_SEC (tail
);
3849 /* Set up this stub group. */
3850 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3852 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3854 /* But wait, there's more! Input sections up to stub_group_size
3855 bytes before the stub section can be handled by it too.
3856 Don't do this if we have a really large section after the
3857 stubs, as adding more stubs increases the chance that
3858 branches may not reach into the stub section. */
3859 if (!stubs_always_before_branch
&& !big_sec
)
3863 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3867 prev
= PREV_SEC (tail
);
3868 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3874 while (list
-- != htab
->input_list
);
3875 free (htab
->input_list
);
3879 /* Read in all local syms for all input bfds.
3880 Returns -1 on error, 0 otherwise. */
3883 get_local_syms (bfd
*output_bfd ATTRIBUTE_UNUSED
, bfd
*input_bfd
,
3884 struct bfd_link_info
*info
)
3886 unsigned int bfd_indx
;
3887 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
3888 int stub_changed
= 0;
3889 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3891 /* We want to read in symbol extension records only once. To do this
3892 we need to read in the local symbols in parallel and save them for
3893 later use; so hold pointers to the local symbols in an array. */
3894 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
3895 all_local_syms
= bfd_zmalloc (amt
);
3896 htab
->all_local_syms
= all_local_syms
;
3897 if (all_local_syms
== NULL
)
3900 /* Walk over all the input BFDs, swapping in local symbols. */
3903 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
3905 Elf_Internal_Shdr
*symtab_hdr
;
3907 /* We'll need the symbol table in a second. */
3908 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3909 if (symtab_hdr
->sh_info
== 0)
3912 /* We need an array of the local symbols attached to the input bfd. */
3913 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3914 if (local_syms
== NULL
)
3916 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
3917 symtab_hdr
->sh_info
, 0,
3919 /* Cache them for elf_link_input_bfd. */
3920 symtab_hdr
->contents
= (unsigned char *) local_syms
;
3922 if (local_syms
== NULL
)
3925 all_local_syms
[bfd_indx
] = local_syms
;
3928 return stub_changed
;
3931 /* Determine and set the size of the stub section for a final link.
3933 The basic idea here is to examine all the relocations looking for
3934 PC-relative calls to a target that is unreachable with a "CALLR"
3937 /* See elf32-hppa.c and elf64-ppc.c. */
3940 elf_metag_size_stubs(bfd
*output_bfd
, bfd
*stub_bfd
,
3941 struct bfd_link_info
*info
,
3942 bfd_signed_vma group_size
,
3943 asection
* (*add_stub_section
) (const char *, asection
*),
3944 void (*layout_sections_again
) (void))
3946 bfd_size_type stub_group_size
;
3947 bfd_boolean stubs_always_before_branch
;
3948 bfd_boolean stub_changed
;
3949 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3951 /* Stash our params away. */
3952 htab
->stub_bfd
= stub_bfd
;
3953 htab
->add_stub_section
= add_stub_section
;
3954 htab
->layout_sections_again
= layout_sections_again
;
3955 stubs_always_before_branch
= group_size
< 0;
3957 stub_group_size
= -group_size
;
3959 stub_group_size
= group_size
;
3960 if (stub_group_size
== 1)
3962 /* Default values. */
3963 /* FIXME: not sure what these values should be */
3964 if (stubs_always_before_branch
)
3966 stub_group_size
= (1 << BRANCH_BITS
);
3970 stub_group_size
= (1 << BRANCH_BITS
);
3974 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3976 switch (get_local_syms (output_bfd
, info
->input_bfds
, info
))
3979 if (htab
->all_local_syms
)
3980 goto error_ret_free_local
;
3984 stub_changed
= FALSE
;
3988 stub_changed
= TRUE
;
3995 unsigned int bfd_indx
;
3998 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
4000 input_bfd
= input_bfd
->link_next
, bfd_indx
++)
4002 Elf_Internal_Shdr
*symtab_hdr
;
4004 Elf_Internal_Sym
*local_syms
;
4006 /* We'll need the symbol table in a second. */
4007 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4008 if (symtab_hdr
->sh_info
== 0)
4011 local_syms
= htab
->all_local_syms
[bfd_indx
];
4013 /* Walk over each section attached to the input bfd. */
4014 for (section
= input_bfd
->sections
;
4016 section
= section
->next
)
4018 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4020 /* If there aren't any relocs, then there's nothing more
4022 if ((section
->flags
& SEC_RELOC
) == 0
4023 || section
->reloc_count
== 0)
4026 /* If this section is a link-once section that will be
4027 discarded, then don't create any stubs. */
4028 if (section
->output_section
== NULL
4029 || section
->output_section
->owner
!= output_bfd
)
4032 /* Get the relocs. */
4034 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
, NULL
,
4036 if (internal_relocs
== NULL
)
4037 goto error_ret_free_local
;
4039 /* Now examine each relocation. */
4040 irela
= internal_relocs
;
4041 irelaend
= irela
+ section
->reloc_count
;
4042 for (; irela
< irelaend
; irela
++)
4044 unsigned int r_type
, r_indx
;
4045 enum elf_metag_stub_type stub_type
;
4046 struct elf_metag_stub_hash_entry
*hsh
;
4049 bfd_vma destination
;
4050 struct elf_metag_link_hash_entry
*hh
;
4052 const asection
*id_sec
;
4054 r_type
= ELF32_R_TYPE (irela
->r_info
);
4055 r_indx
= ELF32_R_SYM (irela
->r_info
);
4057 if (r_type
>= (unsigned int) R_METAG_MAX
)
4059 bfd_set_error (bfd_error_bad_value
);
4060 error_ret_free_internal
:
4061 if (elf_section_data (section
)->relocs
== NULL
)
4062 free (internal_relocs
);
4063 goto error_ret_free_local
;
4066 /* Only look for stubs on CALLR and B instructions. */
4067 if (!(r_type
== (unsigned int) R_METAG_RELBRANCH
||
4068 r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
))
4071 /* Now determine the call target, its name, value,
4077 if (r_indx
< symtab_hdr
->sh_info
)
4079 /* It's a local symbol. */
4080 Elf_Internal_Sym
*sym
;
4081 Elf_Internal_Shdr
*hdr
;
4084 sym
= local_syms
+ r_indx
;
4085 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4086 sym_value
= sym
->st_value
;
4087 shndx
= sym
->st_shndx
;
4088 if (shndx
< elf_numsections (input_bfd
))
4090 hdr
= elf_elfsections (input_bfd
)[shndx
];
4091 sym_sec
= hdr
->bfd_section
;
4092 destination
= (sym_value
+ irela
->r_addend
4093 + sym_sec
->output_offset
4094 + sym_sec
->output_section
->vma
);
4099 /* It's an external symbol. */
4102 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4103 hh
= ((struct elf_metag_link_hash_entry
*)
4104 elf_sym_hashes (input_bfd
)[e_indx
]);
4106 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
4107 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
4108 hh
= ((struct elf_metag_link_hash_entry
*)
4109 hh
->eh
.root
.u
.i
.link
);
4111 if (hh
->eh
.root
.type
== bfd_link_hash_defined
4112 || hh
->eh
.root
.type
== bfd_link_hash_defweak
)
4114 sym_sec
= hh
->eh
.root
.u
.def
.section
;
4115 sym_value
= hh
->eh
.root
.u
.def
.value
;
4116 if (hh
->eh
.plt
.offset
!= (bfd_vma
) -1
4117 && hh
->eh
.dynindx
!= -1
4118 && r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
)
4120 sym_sec
= htab
->splt
;
4121 sym_value
= hh
->eh
.plt
.offset
;
4124 if (sym_sec
->output_section
!= NULL
)
4125 destination
= (sym_value
+ irela
->r_addend
4126 + sym_sec
->output_offset
4127 + sym_sec
->output_section
->vma
);
4131 else if (hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
4136 else if (hh
->eh
.root
.type
== bfd_link_hash_undefined
)
4138 if (! (info
->unresolved_syms_in_objects
== RM_IGNORE
4139 && (ELF_ST_VISIBILITY (hh
->eh
.other
)
4145 bfd_set_error (bfd_error_bad_value
);
4146 goto error_ret_free_internal
;
4150 /* Determine what (if any) linker stub is needed. */
4151 stub_type
= metag_type_of_stub (section
, irela
, hh
,
4153 if (stub_type
== metag_stub_none
)
4156 /* Support for grouping stub sections. */
4157 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4159 /* Get the name of this stub. */
4160 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, irela
);
4162 goto error_ret_free_internal
;
4164 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
4169 /* The proper stub has already been created. */
4174 hsh
= metag_add_stub (stub_name
, section
, htab
);
4178 goto error_ret_free_internal
;
4180 hsh
->target_value
= sym_value
;
4181 hsh
->target_section
= sym_sec
;
4182 hsh
->stub_type
= stub_type
;
4184 hsh
->addend
= irela
->r_addend
;
4185 stub_changed
= TRUE
;
4188 /* We're done with the internal relocs, free them. */
4189 if (elf_section_data (section
)->relocs
== NULL
)
4190 free (internal_relocs
);
4197 /* OK, we've added some stubs. Find out the new size of the
4199 for (stub_sec
= htab
->stub_bfd
->sections
;
4201 stub_sec
= stub_sec
->next
)
4204 bfd_hash_traverse (&htab
->bstab
, metag_size_one_stub
, htab
);
4206 /* Ask the linker to do its stuff. */
4207 (*htab
->layout_sections_again
) ();
4208 stub_changed
= FALSE
;
4211 free (htab
->all_local_syms
);
4214 error_ret_free_local
:
4215 free (htab
->all_local_syms
);
4219 /* Build all the stubs associated with the current output file. The
4220 stubs are kept in a hash table attached to the main linker hash
4221 table. This function is called via metagelf_finish in the linker. */
4224 elf_metag_build_stubs (struct bfd_link_info
*info
)
4227 struct bfd_hash_table
*table
;
4228 struct elf_metag_link_hash_table
*htab
;
4230 htab
= metag_link_hash_table (info
);
4232 for (stub_sec
= htab
->stub_bfd
->sections
;
4234 stub_sec
= stub_sec
->next
)
4238 /* Allocate memory to hold the linker stubs. */
4239 size
= stub_sec
->size
;
4240 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4241 if (stub_sec
->contents
== NULL
&& size
!= 0)
4246 /* Build the stubs as directed by the stub hash table. */
4247 table
= &htab
->bstab
;
4248 bfd_hash_traverse (table
, metag_build_one_stub
, info
);
4253 /* Return TRUE if SYM represents a local label symbol. */
4256 elf_metag_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
4258 if (name
[0] == '$' && name
[1] == 'L')
4260 return _bfd_elf_is_local_label_name (abfd
, name
);
4263 /* Return address for Ith PLT stub in section PLT, for relocation REL
4264 or (bfd_vma) -1 if it should not be included. */
4267 elf_metag_plt_sym_val (bfd_vma i
, const asection
*plt
,
4268 const arelent
*rel ATTRIBUTE_UNUSED
)
4270 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4273 #define ELF_ARCH bfd_arch_metag
4274 #define ELF_TARGET_ID METAG_ELF_DATA
4275 #define ELF_MACHINE_CODE EM_METAG
4276 #define ELF_MINPAGESIZE 0x1000
4277 #define ELF_MAXPAGESIZE 0x4000
4278 #define ELF_COMMONPAGESIZE 0x1000
4280 #define TARGET_LITTLE_SYM bfd_elf32_metag_vec
4281 #define TARGET_LITTLE_NAME "elf32-metag"
4283 #define elf_symbol_leading_char '_'
4285 #define elf_info_to_howto_rel NULL
4286 #define elf_info_to_howto metag_info_to_howto_rela
4288 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4289 #define bfd_elf32_bfd_link_hash_table_create \
4290 elf_metag_link_hash_table_create
4291 #define bfd_elf32_bfd_link_hash_table_free elf_metag_link_hash_table_free
4292 #define elf_backend_relocate_section elf_metag_relocate_section
4293 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4294 #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook
4295 #define elf_backend_check_relocs elf_metag_check_relocs
4296 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4297 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4298 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4299 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4300 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4301 #define elf_backend_omit_section_dynsym \
4302 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4303 #define elf_backend_post_process_headers elf_metag_post_process_headers
4304 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4305 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4306 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4308 #define elf_backend_can_gc_sections 1
4309 #define elf_backend_can_refcount 1
4310 #define elf_backend_got_header_size 12
4311 #define elf_backend_rela_normal 1
4312 #define elf_backend_want_got_sym 0
4313 #define elf_backend_want_plt_sym 0
4314 #define elf_backend_plt_readonly 1
4316 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4317 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4319 #include "elf32-target.h"