1 /* Meta support for 32-bit ELF
2 Copyright (C) 2013-2018 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 Always remember to use GNU Coding Style. */
91 #define PLT_ENTRY_SIZE sizeof(plt_entry)
93 static reloc_howto_type elf_metag_howto_table
[] =
95 /* High order 16 bit absolute. */
96 HOWTO (R_METAG_HIADDR16
, /* type */
98 2, /* size (0 = byte, 1 = short, 2 = long) */
100 FALSE
, /* pc_relative */
102 complain_overflow_dont
, /* complain_on_overflow */
103 bfd_elf_generic_reloc
, /* special_function */
104 "R_METAG_HIADDR16", /* name */
105 FALSE
, /* partial_inplace */
107 0x0007fff8, /* dst_mask */
108 FALSE
), /* pcrel_offset */
110 /* Low order 16 bit absolute. */
111 HOWTO (R_METAG_LOADDR16
, /* type */
113 2, /* size (0 = byte, 1 = short, 2 = long) */
115 FALSE
, /* pc_relative */
117 complain_overflow_dont
,/* complain_on_overflow */
118 bfd_elf_generic_reloc
, /* special_function */
119 "R_METAG_LOADDR16", /* name */
120 FALSE
, /* partial_inplace */
122 0x0007fff8, /* dst_mask */
123 FALSE
), /* pcrel_offset */
125 /* 32 bit absolute. */
126 HOWTO (R_METAG_ADDR32
, /* type */
128 2, /* size (0 = byte, 1 = short, 2 = long) */
130 FALSE
, /* pc_relative */
132 complain_overflow_bitfield
, /* complain_on_overflow */
133 bfd_elf_generic_reloc
, /* special_function */
134 "R_METAG_ADDR32", /* name */
135 FALSE
, /* partial_inplace */
136 0x00000000, /* src_mask */
137 0xffffffff, /* dst_mask */
138 FALSE
), /* pcrel_offset */
141 HOWTO (R_METAG_NONE
, /* type */
143 3, /* size (0 = byte, 1 = short, 2 = long) */
145 FALSE
, /* pc_relative */
147 complain_overflow_dont
, /* complain_on_overflow */
148 bfd_elf_generic_reloc
, /* special_function */
149 "R_METAG_NONE", /* name */
150 FALSE
, /* partial_inplace */
153 FALSE
), /* pcrel_offset */
155 /* 19 bit pc relative */
156 HOWTO (R_METAG_RELBRANCH
, /* type */
158 2, /* size (0 = byte, 1 = short, 2 = long) */
160 TRUE
, /* pc_relative */
162 complain_overflow_signed
, /* complain_on_overflow */
163 bfd_elf_generic_reloc
, /* special_function */
164 "R_METAG_RELBRANCH", /* name */
165 FALSE
, /* partial_inplace */
167 0x00ffffe0, /* dst_mask */
168 FALSE
), /* pcrel_offset */
171 HOWTO (R_METAG_GETSETOFF
, /* type */
173 1, /* size (0 = byte, 1 = short, 2 = long) */
175 FALSE
, /* pc_relative */
177 complain_overflow_dont
, /* complain_on_overflow */
178 bfd_elf_generic_reloc
, /* special_function */
179 "R_METAG_GETSETOFF", /* name */
180 FALSE
, /* partial_inplace */
183 FALSE
), /* pcrel_offset */
210 HOWTO (R_METAG_GNU_VTINHERIT
, /* type */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
214 FALSE
, /* pc_relative */
216 complain_overflow_dont
, /* complain_on_overflow */
217 NULL
, /* special_function */
218 "R_METAG_GNU_VTINHERIT", /* name */
219 FALSE
, /* partial_inplace */
222 FALSE
), /* pcrel_offset */
224 HOWTO (R_METAG_GNU_VTENTRY
, /* type */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
228 FALSE
, /* pc_relative */
230 complain_overflow_dont
, /* complain_on_overflow */
231 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
232 "R_METAG_GNU_VTENTRY", /* name */
233 FALSE
, /* partial_inplace */
236 FALSE
), /* pcrel_offset */
238 /* High order 16 bit GOT offset */
239 HOWTO (R_METAG_HI16_GOTOFF
, /* type */
241 2, /* size (0 = byte, 1 = short, 2 = long) */
243 FALSE
, /* pc_relative */
245 complain_overflow_dont
, /* complain_on_overflow */
246 bfd_elf_generic_reloc
, /* special_function */
247 "R_METAG_HI16_GOTOFF", /* name */
248 FALSE
, /* partial_inplace */
250 0x0007fff8, /* dst_mask */
251 FALSE
), /* pcrel_offset */
253 /* Low order 16 bit GOT offset */
254 HOWTO (R_METAG_LO16_GOTOFF
, /* type */
256 2, /* size (0 = byte, 1 = short, 2 = long) */
258 FALSE
, /* pc_relative */
260 complain_overflow_dont
, /* complain_on_overflow */
261 bfd_elf_generic_reloc
, /* special_function */
262 "R_METAG_LO16_GOTOFF", /* name */
263 FALSE
, /* partial_inplace */
265 0x0007fff8, /* dst_mask */
266 FALSE
), /* pcrel_offset */
268 /* GET/SET GOT offset */
269 HOWTO (R_METAG_GETSET_GOTOFF
, /* type */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
273 FALSE
, /* pc_relative */
275 complain_overflow_dont
, /* complain_on_overflow */
276 bfd_elf_generic_reloc
, /* special_function */
277 "R_METAG_GETSET_GOTOFF", /* name */
278 FALSE
, /* partial_inplace */
281 FALSE
), /* pcrel_offset */
283 /* GET/SET GOT relative */
284 HOWTO (R_METAG_GETSET_GOT
, /* type */
286 1, /* size (0 = byte, 1 = short, 2 = long) */
288 FALSE
, /* pc_relative */
290 complain_overflow_dont
, /* complain_on_overflow */
291 bfd_elf_generic_reloc
, /* special_function */
292 "R_METAG_GETSET_GOT", /* name */
293 FALSE
, /* partial_inplace */
296 FALSE
), /* pcrel_offset */
298 /* High order 16 bit GOT reference */
299 HOWTO (R_METAG_HI16_GOTPC
, /* type */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
303 FALSE
, /* pc_relative */
305 complain_overflow_dont
, /* complain_on_overflow */
306 bfd_elf_generic_reloc
, /* special_function */
307 "R_METAG_HI16_GOTPC", /* name */
308 FALSE
, /* partial_inplace */
310 0x0007fff8, /* dst_mask */
311 FALSE
), /* pcrel_offset */
313 /* Low order 16 bit GOT reference */
314 HOWTO (R_METAG_LO16_GOTPC
, /* type */
316 2, /* size (0 = byte, 1 = short, 2 = long) */
318 FALSE
, /* pc_relative */
320 complain_overflow_dont
, /* complain_on_overflow */
321 bfd_elf_generic_reloc
, /* special_function */
322 "R_METAG_LO16_GOTPC", /* name */
323 FALSE
, /* partial_inplace */
325 0x0007fff8, /* dst_mask */
326 FALSE
), /* pcrel_offset */
328 /* High order 16 bit PLT */
329 HOWTO (R_METAG_HI16_PLT
, /* type */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
333 FALSE
, /* pc_relative */
335 complain_overflow_dont
, /* complain_on_overflow */
336 bfd_elf_generic_reloc
, /* special_function */
337 "R_METAG_HI16_PLT", /* name */
338 FALSE
, /* partial_inplace */
340 0x0007fff8, /* dst_mask */
341 FALSE
), /* pcrel_offset */
343 /* Low order 16 bit PLT */
344 HOWTO (R_METAG_LO16_PLT
, /* type */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
348 FALSE
, /* pc_relative */
350 complain_overflow_dont
, /* complain_on_overflow */
351 bfd_elf_generic_reloc
, /* special_function */
352 "R_METAG_LO16_PLT", /* name */
353 FALSE
, /* partial_inplace */
355 0xffffffff, /* dst_mask */
356 FALSE
), /* pcrel_offset */
358 HOWTO (R_METAG_RELBRANCH_PLT
, /* type */
360 2, /* size (0 = byte, 1 = short, 2 = long) */
362 TRUE
, /* pc_relative */
364 complain_overflow_signed
, /* complain_on_overflow */
365 bfd_elf_generic_reloc
, /* special_function */
366 "R_METAG_RELBRANCH_PLT", /* name */
367 FALSE
, /* partial_inplace */
369 0x00ffffe0, /* dst_mask */
370 FALSE
), /* pcrel_offset */
372 /* Dummy relocs used by the linker internally. */
373 HOWTO (R_METAG_GOTOFF
, /* type */
375 2, /* size (0 = byte, 1 = short, 2 = long) */
377 FALSE
, /* pc_relative */
379 complain_overflow_bitfield
, /* complain_on_overflow */
380 bfd_elf_generic_reloc
, /* special_function */
381 "R_METAG_GOTOFF", /* name */
382 FALSE
, /* partial_inplace */
383 0xffffffff, /* src_mask */
384 0xffffffff, /* dst_mask */
385 FALSE
), /* pcrel_offset */
387 HOWTO (R_METAG_PLT
, /* type */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
391 FALSE
, /* pc_relative */
393 complain_overflow_bitfield
, /* complain_on_overflow */
394 bfd_elf_generic_reloc
, /* special_function */
395 "R_METAG_GOTOFF", /* name */
396 FALSE
, /* partial_inplace */
397 0xffffffff, /* src_mask */
398 0xffffffff, /* dst_mask */
399 FALSE
), /* pcrel_offset */
401 /* This is used only by the dynamic linker. The symbol should exist
402 both in the object being run and in some shared library. The
403 dynamic linker copies the data addressed by the symbol from the
404 shared library into the object, because the object being
405 run has to have the data at some particular address. */
406 HOWTO (R_METAG_COPY
, /* type */
408 2, /* size (0 = byte, 1 = short, 2 = long) */
410 FALSE
, /* pc_relative */
412 complain_overflow_bitfield
, /* complain_on_overflow */
413 bfd_elf_generic_reloc
, /* special_function */
414 "R_METAG_COPY", /* name */
415 FALSE
, /* partial_inplace */
416 0xffffffff, /* src_mask */
417 0xffffffff, /* dst_mask */
418 FALSE
), /* pcrel_offset */
420 /* Marks a procedure linkage table entry for a symbol. */
421 HOWTO (R_METAG_JMP_SLOT
, /* type */
423 2, /* size (0 = byte, 1 = short, 2 = long) */
425 FALSE
, /* pc_relative */
427 complain_overflow_bitfield
, /* complain_on_overflow */
428 bfd_elf_generic_reloc
, /* special_function */
429 "R_METAG_JMP_SLOT", /* name */
430 FALSE
, /* partial_inplace */
431 0xffffffff, /* src_mask */
432 0xffffffff, /* dst_mask */
433 FALSE
), /* pcrel_offset */
435 /* Used only by the dynamic linker. When the object is run, this
436 longword is set to the load address of the object, plus the
438 HOWTO (R_METAG_RELATIVE
, /* type */
440 2, /* size (0 = byte, 1 = short, 2 = long) */
442 FALSE
, /* pc_relative */
444 complain_overflow_bitfield
, /* complain_on_overflow */
445 bfd_elf_generic_reloc
, /* special_function */
446 "R_METAG_RELATIVE", /* name */
447 FALSE
, /* partial_inplace */
448 0xffffffff, /* src_mask */
449 0xffffffff, /* dst_mask */
450 FALSE
), /* pcrel_offset */
452 HOWTO (R_METAG_GLOB_DAT
, /* type */
454 2, /* size (0 = byte, 1 = short, 2 = long) */
456 FALSE
, /* pc_relative */
458 complain_overflow_bitfield
, /* complain_on_overflow */
459 bfd_elf_generic_reloc
, /* special_function */
460 "R_METAG_GLOB_DAT", /* name */
461 FALSE
, /* partial_inplace */
462 0xffffffff, /* src_mask */
463 0xffffffff, /* dst_mask */
464 FALSE
), /* pcrel_offset */
466 HOWTO (R_METAG_TLS_GD
, /* type */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
470 FALSE
, /* pc_relative */
472 complain_overflow_dont
, /* complain_on_overflow */
473 bfd_elf_generic_reloc
, /* special_function */
474 "R_METAG_TLS_GD", /* name */
475 FALSE
, /* partial_inplace */
477 0x0007fff8, /* dst_mask */
478 FALSE
), /* pcrel_offset */
480 HOWTO (R_METAG_TLS_LDM
, /* type */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
484 FALSE
, /* pc_relative */
486 complain_overflow_bitfield
, /* complain_on_overflow */
487 bfd_elf_generic_reloc
, /* special_function */
488 "R_METAG_TLS_LDM", /* name */
489 FALSE
, /* partial_inplace */
491 0x0007fff8, /* dst_mask */
492 FALSE
), /* pcrel_offset */
494 HOWTO (R_METAG_TLS_LDO_HI16
, /* type */
496 2, /* size (0 = byte, 1 = short, 2 = long) */
498 FALSE
, /* pc_relative */
500 complain_overflow_bitfield
, /* complain_on_overflow */
501 bfd_elf_generic_reloc
, /* special_function */
502 "R_METAG_TLS_LDO_HI16", /* name */
503 FALSE
, /* partial_inplace */
505 0x0007fff8, /* dst_mask */
506 FALSE
), /* pcrel_offset */
508 HOWTO (R_METAG_TLS_LDO_LO16
, /* type */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
512 FALSE
, /* pc_relative */
514 complain_overflow_bitfield
, /* complain_on_overflow */
515 bfd_elf_generic_reloc
, /* special_function */
516 "R_METAG_TLS_LDO_LO16", /* name */
517 FALSE
, /* partial_inplace */
519 0x0007fff8, /* dst_mask */
520 FALSE
), /* pcrel_offset */
522 /* Dummy reloc used by the linker internally. */
523 HOWTO (R_METAG_TLS_LDO
, /* type */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
527 FALSE
, /* pc_relative */
529 complain_overflow_bitfield
, /* complain_on_overflow */
530 bfd_elf_generic_reloc
, /* special_function */
531 "R_METAG_TLS_LDO", /* name */
532 FALSE
, /* partial_inplace */
534 0x0007fff8, /* dst_mask */
535 FALSE
), /* pcrel_offset */
537 HOWTO (R_METAG_TLS_IE
, /* type */
539 2, /* size (0 = byte, 1 = short, 2 = long) */
541 FALSE
, /* pc_relative */
543 complain_overflow_dont
, /* complain_on_overflow */
544 bfd_elf_generic_reloc
, /* special_function */
545 "R_METAG_TLS_IE", /* name */
546 FALSE
, /* partial_inplace */
548 0x0007ff80, /* dst_mask */
549 FALSE
), /* pcrel_offset */
551 /* Dummy reloc used by the linker internally. */
552 HOWTO (R_METAG_TLS_IENONPIC
, /* type */
554 2, /* size (0 = byte, 1 = short, 2 = long) */
556 FALSE
, /* pc_relative */
558 complain_overflow_dont
, /* complain_on_overflow */
559 bfd_elf_generic_reloc
, /* special_function */
560 "R_METAG_TLS_IENONPIC", /* name */
561 FALSE
, /* partial_inplace */
563 0x0007fff8, /* dst_mask */
564 FALSE
), /* pcrel_offset */
566 HOWTO (R_METAG_TLS_IENONPIC_HI16
,/* type */
568 2, /* size (0 = byte, 1 = short, 2 = long) */
570 FALSE
, /* pc_relative */
572 complain_overflow_dont
, /* complain_on_overflow */
573 bfd_elf_generic_reloc
, /* special_function */
574 "R_METAG_TLS_IENONPIC_HI16", /* name */
575 FALSE
, /* partial_inplace */
577 0x0007fff8, /* dst_mask */
578 FALSE
), /* pcrel_offset */
580 HOWTO (R_METAG_TLS_IENONPIC_LO16
,/* type */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
584 FALSE
, /* pc_relative */
586 complain_overflow_dont
, /* complain_on_overflow */
587 bfd_elf_generic_reloc
, /* special_function */
588 "R_METAG_TLS_IENONPIC_LO16", /* name */
589 FALSE
, /* partial_inplace */
591 0x0007fff8, /* dst_mask */
592 FALSE
), /* pcrel_offset */
594 HOWTO (R_METAG_TLS_TPOFF
, /* type */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
598 FALSE
, /* pc_relative */
600 complain_overflow_bitfield
, /* complain_on_overflow */
601 bfd_elf_generic_reloc
, /* special_function */
602 "R_METAG_TLS_TPOFF", /* name */
603 FALSE
, /* partial_inplace */
605 0xffffffff, /* dst_mask */
606 FALSE
), /* pcrel_offset */
608 HOWTO (R_METAG_TLS_DTPMOD
, /* type */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
612 FALSE
, /* pc_relative */
614 complain_overflow_bitfield
, /* complain_on_overflow */
615 bfd_elf_generic_reloc
, /* special_function */
616 "R_METAG_TLS_DTPMOD", /* name */
617 FALSE
, /* partial_inplace */
619 0xffffffff, /* dst_mask */
620 FALSE
), /* pcrel_offset */
622 HOWTO (R_METAG_TLS_DTPOFF
, /* type */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
626 FALSE
, /* pc_relative */
628 complain_overflow_bitfield
, /* complain_on_overflow */
629 bfd_elf_generic_reloc
, /* special_function */
630 "R_METAG_TLS_DTPOFF", /* name */
631 FALSE
, /* partial_inplace */
633 0xffffffff, /* dst_mask */
634 FALSE
), /* pcrel_offset */
636 /* Dummy reloc used by the linker internally. */
637 HOWTO (R_METAG_TLS_LE
, /* type */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
641 FALSE
, /* pc_relative */
643 complain_overflow_bitfield
, /* complain_on_overflow */
644 bfd_elf_generic_reloc
, /* special_function */
645 "R_METAG_TLS_LE", /* name */
646 FALSE
, /* partial_inplace */
648 0xffffffff, /* dst_mask */
649 FALSE
), /* pcrel_offset */
651 HOWTO (R_METAG_TLS_LE_HI16
, /* type */
653 2, /* size (0 = byte, 1 = short, 2 = long) */
655 FALSE
, /* pc_relative */
657 complain_overflow_dont
, /* complain_on_overflow */
658 bfd_elf_generic_reloc
, /* special_function */
659 "R_METAG_TLS_LE_HI16", /* name */
660 FALSE
, /* partial_inplace */
662 0x0007fff8, /* dst_mask */
663 FALSE
), /* pcrel_offset */
665 HOWTO (R_METAG_TLS_LE_LO16
, /* type */
667 2, /* size (0 = byte, 1 = short, 2 = long) */
669 FALSE
, /* pc_relative */
671 complain_overflow_dont
, /* complain_on_overflow */
672 bfd_elf_generic_reloc
, /* special_function */
673 "R_METAG_TLS_LE_LO16", /* name */
674 FALSE
, /* partial_inplace */
676 0x0007fff8, /* dst_mask */
677 FALSE
), /* pcrel_offset */
681 #define BRANCH_BITS 19
683 /* The GOT is typically accessed using a [GS]ETD instruction. The size of the
684 immediate offset which can be used in such instructions therefore limits
685 the usable size of the GOT. If the base register for the [GS]ETD (A1LbP)
686 is pointing to the base of the GOT then the size is limited to the maximum
687 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset
688 in a [GS]ETD instruction is signed, so by setting the base address register
689 to an offset of that 0x2000 byte maximum unsigned offset from the base of
690 the GOT we can use negative offsets in addition to positive. This
691 effectively doubles the usable GOT size to 0x4000 bytes. */
692 #define GOT_REG_OFFSET 0x2000
694 struct metag_reloc_map
696 bfd_reloc_code_real_type bfd_reloc_val
;
697 unsigned int metag_reloc_val
;
700 static const struct metag_reloc_map metag_reloc_map
[] =
702 { BFD_RELOC_NONE
, R_METAG_NONE
},
703 { BFD_RELOC_32
, R_METAG_ADDR32
},
704 { BFD_RELOC_METAG_HIADDR16
, R_METAG_HIADDR16
},
705 { BFD_RELOC_METAG_LOADDR16
, R_METAG_LOADDR16
},
706 { BFD_RELOC_METAG_RELBRANCH
, R_METAG_RELBRANCH
},
707 { BFD_RELOC_METAG_GETSETOFF
, R_METAG_GETSETOFF
},
708 { BFD_RELOC_VTABLE_INHERIT
, R_METAG_GNU_VTINHERIT
},
709 { BFD_RELOC_VTABLE_ENTRY
, R_METAG_GNU_VTENTRY
},
710 { BFD_RELOC_METAG_REL8
, R_METAG_REL8
},
711 { BFD_RELOC_METAG_REL16
, R_METAG_REL16
},
712 { BFD_RELOC_METAG_HI16_GOTOFF
, R_METAG_HI16_GOTOFF
},
713 { BFD_RELOC_METAG_LO16_GOTOFF
, R_METAG_LO16_GOTOFF
},
714 { BFD_RELOC_METAG_GETSET_GOTOFF
, R_METAG_GETSET_GOTOFF
},
715 { BFD_RELOC_METAG_GETSET_GOT
, R_METAG_GETSET_GOT
},
716 { BFD_RELOC_METAG_HI16_GOTPC
, R_METAG_HI16_GOTPC
},
717 { BFD_RELOC_METAG_LO16_GOTPC
, R_METAG_LO16_GOTPC
},
718 { BFD_RELOC_METAG_HI16_PLT
, R_METAG_HI16_PLT
},
719 { BFD_RELOC_METAG_LO16_PLT
, R_METAG_LO16_PLT
},
720 { BFD_RELOC_METAG_RELBRANCH_PLT
, R_METAG_RELBRANCH_PLT
},
721 { BFD_RELOC_METAG_GOTOFF
, R_METAG_GOTOFF
},
722 { BFD_RELOC_METAG_PLT
, R_METAG_PLT
},
723 { BFD_RELOC_METAG_COPY
, R_METAG_COPY
},
724 { BFD_RELOC_METAG_JMP_SLOT
, R_METAG_JMP_SLOT
},
725 { BFD_RELOC_METAG_RELATIVE
, R_METAG_RELATIVE
},
726 { BFD_RELOC_METAG_GLOB_DAT
, R_METAG_GLOB_DAT
},
727 { BFD_RELOC_METAG_TLS_GD
, R_METAG_TLS_GD
},
728 { BFD_RELOC_METAG_TLS_LDM
, R_METAG_TLS_LDM
},
729 { BFD_RELOC_METAG_TLS_LDO_HI16
, R_METAG_TLS_LDO_HI16
},
730 { BFD_RELOC_METAG_TLS_LDO_LO16
, R_METAG_TLS_LDO_LO16
},
731 { BFD_RELOC_METAG_TLS_LDO
, R_METAG_TLS_LDO
},
732 { BFD_RELOC_METAG_TLS_IE
, R_METAG_TLS_IE
},
733 { BFD_RELOC_METAG_TLS_IENONPIC
, R_METAG_TLS_IENONPIC
},
734 { BFD_RELOC_METAG_TLS_IENONPIC_HI16
, R_METAG_TLS_IENONPIC_HI16
},
735 { BFD_RELOC_METAG_TLS_IENONPIC_LO16
, R_METAG_TLS_IENONPIC_LO16
},
736 { BFD_RELOC_METAG_TLS_TPOFF
, R_METAG_TLS_TPOFF
},
737 { BFD_RELOC_METAG_TLS_DTPMOD
, R_METAG_TLS_DTPMOD
},
738 { BFD_RELOC_METAG_TLS_DTPOFF
, R_METAG_TLS_DTPOFF
},
739 { BFD_RELOC_METAG_TLS_LE
, R_METAG_TLS_LE
},
740 { BFD_RELOC_METAG_TLS_LE_HI16
, R_METAG_TLS_LE_HI16
},
741 { BFD_RELOC_METAG_TLS_LE_LO16
, R_METAG_TLS_LE_LO16
},
744 enum elf_metag_stub_type
746 metag_stub_long_branch
,
747 metag_stub_long_branch_shared
,
751 struct elf_metag_stub_hash_entry
753 /* Base hash table entry structure. */
754 struct bfd_hash_entry bh_root
;
756 /* The stub section. */
759 /* Offset within stub_sec of the beginning of this stub. */
762 /* Given the symbol's value and its section we can determine its final
763 value when building the stubs (so the stub knows where to jump. */
764 bfd_vma target_value
;
765 asection
*target_section
;
767 enum elf_metag_stub_type stub_type
;
769 /* The symbol table entry, if any, that this was derived from. */
770 struct elf_metag_link_hash_entry
*hh
;
772 /* And the reloc addend that this was derived from. */
775 /* Where this stub is being called from, or, in the case of combined
776 stub sections, the first input section in the group. */
780 struct elf_metag_link_hash_entry
782 struct elf_link_hash_entry eh
;
784 /* A pointer to the most recently used stub hash entry against this
786 struct elf_metag_stub_hash_entry
*hsh_cache
;
788 /* Used to count relocations for delayed sizing of relocation
790 struct elf_dyn_relocs
*dyn_relocs
;
794 GOT_UNKNOWN
= 0, GOT_NORMAL
= 1, GOT_TLS_IE
= 2, GOT_TLS_LDM
= 4, GOT_TLS_GD
= 8
798 struct elf_metag_link_hash_table
800 /* The main hash table. */
801 struct elf_link_hash_table etab
;
803 /* The stub hash table. */
804 struct bfd_hash_table bstab
;
806 /* Linker stub bfd. */
809 /* Linker call-backs. */
810 asection
* (*add_stub_section
) (const char *, asection
*);
811 void (*layout_sections_again
) (void);
813 /* Array to keep track of which stub sections have been created, and
814 information on stub grouping. */
817 /* This is the section to which stubs in the group will be
820 /* The stub section. */
824 /* Assorted information used by elf_metag_size_stubs. */
825 unsigned int bfd_count
;
826 unsigned int top_index
;
827 asection
**input_list
;
828 Elf_Internal_Sym
**all_local_syms
;
830 /* Small local sym cache. */
831 struct sym_cache sym_cache
;
833 /* Data for LDM relocations. */
836 bfd_signed_vma refcount
;
841 /* Return the base vma address which should be subtracted from the
842 real address when resolving a dtpoff relocation. This is PT_TLS
845 dtpoff_base (struct bfd_link_info
*info
)
847 /* If tls_sec is NULL, we should have signalled an error already. */
848 if (elf_hash_table (info
)->tls_sec
== NULL
)
850 return elf_hash_table (info
)->tls_sec
->vma
;
853 /* Return the relocation value for R_METAG_TLS_IE */
855 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
857 /* If tls_sec is NULL, we should have signalled an error already. */
858 if (elf_hash_table (info
)->tls_sec
== NULL
)
860 /* METAG TLS ABI is variant I and static TLS blocks start just after
861 tcbhead structure which has 2 pointer fields. */
862 return (address
- elf_hash_table (info
)->tls_sec
->vma
863 + align_power ((bfd_vma
) 8,
864 elf_hash_table (info
)->tls_sec
->alignment_power
));
868 metag_info_to_howto_rela (bfd
*abfd ATTRIBUTE_UNUSED
,
870 Elf_Internal_Rela
*dst
)
874 r_type
= ELF32_R_TYPE (dst
->r_info
);
875 if (r_type
>= (unsigned int) R_METAG_MAX
)
877 /* xgettext:c-format */
878 _bfd_error_handler (_("%pB: invalid METAG reloc number: %d"), abfd
, r_type
);
881 cache_ptr
->howto
= & elf_metag_howto_table
[r_type
];
884 static reloc_howto_type
*
885 metag_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
886 bfd_reloc_code_real_type code
)
890 for (i
= 0; i
< sizeof (metag_reloc_map
) / sizeof (metag_reloc_map
[0]); i
++)
891 if (metag_reloc_map
[i
].bfd_reloc_val
== code
)
892 return & elf_metag_howto_table
[metag_reloc_map
[i
].metag_reloc_val
];
897 static reloc_howto_type
*
898 metag_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
903 for (i
= 0; i
< sizeof (elf_metag_howto_table
) / sizeof (elf_metag_howto_table
[0]); i
++)
904 if (elf_metag_howto_table
[i
].name
!= NULL
905 && strcasecmp (elf_metag_howto_table
[i
].name
, r_name
) == 0)
906 return &elf_metag_howto_table
[i
];
911 /* Various hash macros and functions. */
912 #define metag_link_hash_table(p) \
913 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
914 == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL)
916 #define metag_elf_hash_entry(ent) \
917 ((struct elf_metag_link_hash_entry *)(ent))
919 #define metag_stub_hash_entry(ent) \
920 ((struct elf_metag_stub_hash_entry *)(ent))
922 #define metag_stub_hash_lookup(table, string, create, copy) \
923 ((struct elf_metag_stub_hash_entry *) \
924 bfd_hash_lookup ((table), (string), (create), (copy)))
926 #define metag_elf_local_got_tls_type(abfd) \
927 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info)))
929 /* Assorted hash table functions. */
931 /* Initialize an entry in the stub hash table. */
933 static struct bfd_hash_entry
*
934 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
935 struct bfd_hash_table
*table
,
938 /* Allocate the structure if it has not already been allocated by a
942 entry
= bfd_hash_allocate (table
,
943 sizeof (struct elf_metag_stub_hash_entry
));
948 /* Call the allocation method of the superclass. */
949 entry
= bfd_hash_newfunc (entry
, table
, string
);
952 struct elf_metag_stub_hash_entry
*hsh
;
954 /* Initialize the local fields. */
955 hsh
= (struct elf_metag_stub_hash_entry
*) entry
;
956 hsh
->stub_sec
= NULL
;
957 hsh
->stub_offset
= 0;
958 hsh
->target_value
= 0;
959 hsh
->target_section
= NULL
;
960 hsh
->stub_type
= metag_stub_long_branch
;
968 /* Initialize an entry in the link hash table. */
970 static struct bfd_hash_entry
*
971 metag_link_hash_newfunc (struct bfd_hash_entry
*entry
,
972 struct bfd_hash_table
*table
,
975 /* Allocate the structure if it has not already been allocated by a
979 entry
= bfd_hash_allocate (table
,
980 sizeof (struct elf_metag_link_hash_entry
));
985 /* Call the allocation method of the superclass. */
986 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
989 struct elf_metag_link_hash_entry
*hh
;
991 /* Initialize the local fields. */
992 hh
= (struct elf_metag_link_hash_entry
*) entry
;
993 hh
->hsh_cache
= NULL
;
994 hh
->dyn_relocs
= NULL
;
995 hh
->tls_type
= GOT_UNKNOWN
;
1001 /* Free the derived linker hash table. */
1004 elf_metag_link_hash_table_free (bfd
*obfd
)
1006 struct elf_metag_link_hash_table
*htab
1007 = (struct elf_metag_link_hash_table
*) obfd
->link
.hash
;
1009 bfd_hash_table_free (&htab
->bstab
);
1010 _bfd_elf_link_hash_table_free (obfd
);
1013 /* Create the derived linker hash table. The Meta ELF port uses the derived
1014 hash table to keep information specific to the Meta ELF linker (without
1015 using static variables). */
1017 static struct bfd_link_hash_table
*
1018 elf_metag_link_hash_table_create (bfd
*abfd
)
1020 struct elf_metag_link_hash_table
*htab
;
1021 bfd_size_type amt
= sizeof (*htab
);
1023 htab
= bfd_zmalloc (amt
);
1027 if (!_bfd_elf_link_hash_table_init (&htab
->etab
, abfd
,
1028 metag_link_hash_newfunc
,
1029 sizeof (struct elf_metag_link_hash_entry
),
1036 /* Init the stub hash table too. */
1037 if (!bfd_hash_table_init (&htab
->bstab
, stub_hash_newfunc
,
1038 sizeof (struct elf_metag_stub_hash_entry
)))
1040 _bfd_elf_link_hash_table_free (abfd
);
1043 htab
->etab
.root
.hash_table_free
= elf_metag_link_hash_table_free
;
1045 return &htab
->etab
.root
;
1048 /* Section name for stubs is the associated section name plus this
1050 #define STUB_SUFFIX ".stub"
1052 /* Build a name for an entry in the stub hash table. */
1055 metag_stub_name (const asection
*input_section
,
1056 const asection
*sym_sec
,
1057 const struct elf_metag_link_hash_entry
*hh
,
1058 const Elf_Internal_Rela
*rel
)
1065 len
= 8 + 1 + strlen (hh
->eh
.root
.root
.string
) + 1 + 8 + 1;
1066 stub_name
= bfd_malloc (len
);
1067 if (stub_name
!= NULL
)
1069 sprintf (stub_name
, "%08x_%s+%x",
1070 input_section
->id
& 0xffffffff,
1071 hh
->eh
.root
.root
.string
,
1072 (int) rel
->r_addend
& 0xffffffff);
1077 len
= 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
1078 stub_name
= bfd_malloc (len
);
1079 if (stub_name
!= NULL
)
1081 sprintf (stub_name
, "%08x_%x:%x+%x",
1082 input_section
->id
& 0xffffffff,
1083 sym_sec
->id
& 0xffffffff,
1084 (int) ELF32_R_SYM (rel
->r_info
) & 0xffffffff,
1085 (int) rel
->r_addend
& 0xffffffff);
1091 /* Look up an entry in the stub hash. Stub entries are cached because
1092 creating the stub name takes a bit of time. */
1094 static struct elf_metag_stub_hash_entry
*
1095 metag_get_stub_entry (const asection
*input_section
,
1096 const asection
*sym_sec
,
1097 struct elf_metag_link_hash_entry
*hh
,
1098 const Elf_Internal_Rela
*rel
,
1099 struct elf_metag_link_hash_table
*htab
)
1101 struct elf_metag_stub_hash_entry
*hsh
;
1102 const asection
*id_sec
;
1104 /* If this input section is part of a group of sections sharing one
1105 stub section, then use the id of the first section in the group.
1106 Stub names need to include a section id, as there may well be
1107 more than one stub used to reach say, printf, and we need to
1108 distinguish between them. */
1109 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
1111 if (hh
!= NULL
&& hh
->hsh_cache
!= NULL
1112 && hh
->hsh_cache
->hh
== hh
1113 && hh
->hsh_cache
->id_sec
== id_sec
)
1115 hsh
= hh
->hsh_cache
;
1121 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, rel
);
1122 if (stub_name
== NULL
)
1125 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
1126 stub_name
, FALSE
, FALSE
);
1129 hh
->hsh_cache
= hsh
;
1137 /* Add a new stub entry to the stub hash. Not all fields of the new
1138 stub entry are initialised. */
1140 static struct elf_metag_stub_hash_entry
*
1141 metag_add_stub (const char *stub_name
,
1143 struct elf_metag_link_hash_table
*htab
)
1147 struct elf_metag_stub_hash_entry
*hsh
;
1149 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
1150 stub_sec
= htab
->stub_group
[section
->id
].stub_sec
;
1151 if (stub_sec
== NULL
)
1153 stub_sec
= htab
->stub_group
[link_sec
->id
].stub_sec
;
1154 if (stub_sec
== NULL
)
1160 namelen
= strlen (link_sec
->name
);
1161 len
= namelen
+ sizeof (STUB_SUFFIX
);
1162 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
1166 memcpy (s_name
, link_sec
->name
, namelen
);
1167 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
1169 stub_sec
= (*htab
->add_stub_section
) (s_name
, link_sec
);
1170 if (stub_sec
== NULL
)
1172 htab
->stub_group
[link_sec
->id
].stub_sec
= stub_sec
;
1174 htab
->stub_group
[section
->id
].stub_sec
= stub_sec
;
1177 /* Enter this entry into the linker stub hash table. */
1178 hsh
= metag_stub_hash_lookup (&htab
->bstab
, stub_name
,
1182 /* xgettext:c-format */
1183 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
1184 section
->owner
, stub_name
);
1188 hsh
->stub_sec
= stub_sec
;
1189 hsh
->stub_offset
= 0;
1190 hsh
->id_sec
= link_sec
;
1194 /* Check a signed integer value can be represented in the given number
1198 within_signed_range (int value
, unsigned int bits
)
1200 int min_val
= -(1 << (bits
- 1));
1201 int max_val
= (1 << (bits
- 1)) - 1;
1202 return (value
<= max_val
) && (value
>= min_val
);
1205 /* Perform a relocation as part of a final link. */
1207 static bfd_reloc_status_type
1208 metag_final_link_relocate (reloc_howto_type
*howto
,
1210 asection
*input_section
,
1212 Elf_Internal_Rela
*rel
,
1214 struct elf_metag_link_hash_entry
*hh
,
1215 struct elf_metag_link_hash_table
*htab
,
1218 bfd_reloc_status_type r
= bfd_reloc_ok
;
1219 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
1220 int opcode
, op_shift
, op_extended
, l1
, l2
;
1221 bfd_signed_vma srel
, addend
= rel
->r_addend
;
1222 struct elf_metag_stub_hash_entry
*hsh
= NULL
;
1225 /* Find out where we are and where we're going. */
1226 location
= (rel
->r_offset
+
1227 input_section
->output_offset
+
1228 input_section
->output_section
->vma
);
1230 switch (howto
->type
)
1232 case R_METAG_RELBRANCH
:
1233 case R_METAG_RELBRANCH_PLT
:
1234 /* Make it a pc relative offset. */
1235 relocation
-= location
;
1237 case R_METAG_TLS_GD
:
1238 case R_METAG_TLS_IE
:
1239 relocation
-= elf_gp (input_section
->output_section
->owner
);
1245 switch (howto
->type
)
1247 case R_METAG_RELBRANCH_PLT
:
1248 case R_METAG_RELBRANCH
:
1249 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1251 srel
= (bfd_signed_vma
) relocation
;
1254 /* If the branch is out of reach, then redirect the
1255 call to the local stub for this function. */
1256 if (srel
> ((1 << (BRANCH_BITS
+ 1)) - 1) ||
1257 (srel
< - (1 << (BRANCH_BITS
+ 1))))
1259 if (sym_sec
== NULL
)
1262 hsh
= metag_get_stub_entry (input_section
, sym_sec
,
1265 return bfd_reloc_undefined
;
1267 /* Munge up the value and addend so that we call the stub
1268 rather than the procedure directly. */
1269 srel
= (hsh
->stub_offset
1270 + hsh
->stub_sec
->output_offset
1271 + hsh
->stub_sec
->output_section
->vma
);
1277 if (!within_signed_range (srel
, BRANCH_BITS
))
1279 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1282 return bfd_reloc_overflow
;
1285 opcode
&= ~(0x7ffff << 5);
1286 opcode
|= ((srel
& 0x7ffff) << 5);
1288 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1290 case R_METAG_GETSETOFF
:
1291 case R_METAG_GETSET_GOT
:
1292 case R_METAG_GETSET_GOTOFF
:
1293 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1295 srel
= (bfd_signed_vma
) relocation
;
1298 /* Is this a standard or extended GET/SET? */
1299 if ((opcode
& 0xf0000000) == 0xa0000000)
1301 /* Extended GET/SET. */
1308 /* Standard GET/SET. */
1309 l1
= opcode
& 0x01000000;
1310 l2
= opcode
& 0x04000000;
1314 /* Calculate the width of the GET/SET and how much we need to
1315 shift the result by. */
1327 /* GET/SET offsets are scaled by the width of the transfer. */
1328 srel
= srel
>> op_shift
;
1330 /* Extended GET/SET has signed 12 bits of offset, standard has
1334 if (!within_signed_range (srel
, 12))
1336 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1339 return bfd_reloc_overflow
;
1341 opcode
&= ~(0xfff << 7);
1342 opcode
|= ((srel
& 0xfff) << 7);
1346 if (!within_signed_range (srel
, 5))
1348 if (hh
&& hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
1351 return bfd_reloc_overflow
;
1353 opcode
&= ~(0x3f << 8);
1354 opcode
|= ((srel
& 0x3f) << 8);
1357 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1359 case R_METAG_TLS_GD
:
1360 case R_METAG_TLS_LDM
:
1361 opcode
= bfd_get_32 (input_bfd
, hit_data
);
1363 if ((bfd_signed_vma
)relocation
< 0)
1365 /* sign extend immediate */
1366 if ((opcode
& 0xf2000001) == 0x02000000)
1368 /* ADD De.e,Dx.r,#I16 */
1372 return bfd_reloc_overflow
;
1375 bfd_put_32 (input_bfd
, opcode
, hit_data
);
1377 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1378 contents
, rel
->r_offset
,
1379 relocation
, rel
->r_addend
);
1382 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1383 contents
, rel
->r_offset
,
1384 relocation
, rel
->r_addend
);
1390 /* This is defined because R_METAG_NONE != 0...
1391 See RELOC_AGAINST_DISCARDED_SECTION for details. */
1392 #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
1393 rel, relend, howto, contents) \
1395 _bfd_clear_contents (howto, input_bfd, input_section, \
1396 contents + rel->r_offset); \
1398 if (bfd_link_relocatable (info) \
1399 && (input_section->flags & SEC_DEBUGGING)) \
1401 /* Only remove relocations in debug sections since other \
1402 sections may require relocations. */ \
1403 Elf_Internal_Shdr *rel_hdr; \
1405 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
1407 /* Avoid empty output section. */ \
1408 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
1410 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1411 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
1412 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
1414 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \
1416 input_section->reloc_count--; \
1423 rel->r_info = R_METAG_NONE; \
1424 rel->r_addend = 0; \
1428 /* Relocate a META ELF section.
1430 The RELOCATE_SECTION function is called by the new ELF backend linker
1431 to handle the relocations for a section.
1433 The relocs are always passed as Rela structures; if the section
1434 actually uses Rel structures, the r_addend field will always be
1437 This function is responsible for adjusting the section contents as
1438 necessary, and (if using Rela relocs and generating a relocatable
1439 output file) adjusting the reloc addend as necessary.
1441 This function does not have to worry about setting the reloc
1442 address or the reloc symbol index.
1444 LOCAL_SYMS is a pointer to the swapped in local symbols.
1446 LOCAL_SECTIONS is an array giving the section in the input file
1447 corresponding to the st_shndx field of each local symbol.
1449 The global hash table entry for the global symbols can be found
1450 via elf_sym_hashes (input_bfd).
1452 When generating relocatable output, this function must handle
1453 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1454 going to be the section symbol corresponding to the output
1455 section, which means that the addend must be adjusted
1459 elf_metag_relocate_section (bfd
*output_bfd
,
1460 struct bfd_link_info
*info
,
1462 asection
*input_section
,
1464 Elf_Internal_Rela
*relocs
,
1465 Elf_Internal_Sym
*local_syms
,
1466 asection
**local_sections
)
1468 bfd_vma
*local_got_offsets
;
1469 Elf_Internal_Shdr
*symtab_hdr
;
1470 struct elf_link_hash_entry
**eh_syms
;
1471 struct elf_metag_link_hash_table
*htab
;
1472 Elf_Internal_Rela
*rel
;
1473 Elf_Internal_Rela
*relend
;
1476 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
1477 eh_syms
= elf_sym_hashes (input_bfd
);
1478 relend
= relocs
+ input_section
->reloc_count
;
1480 htab
= metag_link_hash_table (info
);
1481 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1485 for (rel
= relocs
; rel
< relend
; rel
++)
1487 reloc_howto_type
*howto
;
1488 unsigned long r_symndx
;
1489 Elf_Internal_Sym
*sym
;
1491 struct elf_metag_link_hash_entry
*hh
;
1493 bfd_reloc_status_type r
;
1497 r_type
= ELF32_R_TYPE (rel
->r_info
);
1499 if (r_type
== R_METAG_GNU_VTINHERIT
1500 || r_type
== R_METAG_GNU_VTENTRY
1501 || r_type
== R_METAG_NONE
)
1504 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1506 howto
= elf_metag_howto_table
+ ELF32_R_TYPE (rel
->r_info
);
1511 if (r_symndx
< symtab_hdr
->sh_info
)
1513 sym
= local_syms
+ r_symndx
;
1514 sec
= local_sections
[r_symndx
];
1515 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1517 name
= bfd_elf_string_from_elf_section
1518 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
1519 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
1523 struct elf_link_hash_entry
*eh
;
1524 bfd_boolean unresolved_reloc
, warned
, ignored
;
1526 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1527 r_symndx
, symtab_hdr
, eh_syms
,
1528 eh
, sec
, relocation
,
1529 unresolved_reloc
, warned
, ignored
);
1531 name
= eh
->root
.root
.string
;
1532 hh
= (struct elf_metag_link_hash_entry
*) eh
;
1535 if (sec
!= NULL
&& discarded_section (sec
))
1536 METAG_RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1537 rel
, relend
, howto
, contents
);
1539 if (bfd_link_relocatable (info
))
1544 case R_METAG_ADDR32
:
1545 case R_METAG_RELBRANCH
:
1546 if ((input_section
->flags
& SEC_ALLOC
) == 0)
1549 if ((bfd_link_pic (info
)
1550 && r_symndx
!= STN_UNDEF
1551 && (input_section
->flags
& SEC_ALLOC
) != 0
1552 && (r_type
!= R_METAG_RELBRANCH
1553 || !SYMBOL_CALLS_LOCAL (info
, &hh
->eh
)))
1554 || (!bfd_link_pic (info
)
1556 && hh
->eh
.dynindx
!= -1
1557 && !hh
->eh
.non_got_ref
1558 && ((hh
->eh
.def_dynamic
1559 && !hh
->eh
.def_regular
)
1560 || hh
->eh
.root
.type
== bfd_link_hash_undefweak
1561 || hh
->eh
.root
.type
== bfd_link_hash_undefined
)))
1563 Elf_Internal_Rela outrel
;
1564 bfd_boolean skip
, relocate
;
1567 /* When generating a shared object, these relocations
1568 are copied into the output file to be resolved at run
1571 sreloc
= elf_section_data (input_section
)->sreloc
;
1572 BFD_ASSERT (sreloc
!= NULL
);
1577 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
1581 if (outrel
.r_offset
== (bfd_vma
) -1)
1583 else if (outrel
.r_offset
== (bfd_vma
) -2)
1584 skip
= TRUE
, relocate
= TRUE
;
1585 outrel
.r_offset
+= (input_section
->output_section
->vma
1586 + input_section
->output_offset
);
1590 memset (&outrel
, 0, sizeof outrel
);
1591 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_NONE
);
1593 else if (r_type
== R_METAG_RELBRANCH
)
1595 BFD_ASSERT (hh
!= NULL
&& hh
->eh
.dynindx
!= -1);
1596 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1597 outrel
.r_addend
= rel
->r_addend
;
1601 /* h->dynindx may be -1 if this symbol was marked to
1604 || ((info
->symbolic
|| hh
->eh
.dynindx
== -1)
1605 && hh
->eh
.def_regular
))
1608 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1609 outrel
.r_addend
= relocation
+ rel
->r_addend
;
1613 BFD_ASSERT (hh
->eh
.dynindx
!= -1);
1614 outrel
.r_info
= ELF32_R_INFO (hh
->eh
.dynindx
, r_type
);
1615 outrel
.r_addend
= rel
->r_addend
;
1619 loc
= sreloc
->contents
;
1620 loc
+= sreloc
->reloc_count
* sizeof(Elf32_External_Rela
);
1621 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
,loc
);
1622 ++sreloc
->reloc_count
;
1624 /* If this reloc is against an external symbol, we do
1625 not want to fiddle with the addend. Otherwise, we
1626 need to include the symbol value so that it becomes
1627 an addend for the dynamic reloc. */
1633 case R_METAG_RELBRANCH_PLT
:
1634 /* Relocation is to the entry for this symbol in the
1635 procedure linkage table. */
1640 if (hh
->eh
.forced_local
)
1643 if (hh
->eh
.plt
.offset
== (bfd_vma
) -1 || htab
->etab
.splt
== NULL
)
1645 /* We didn't make a PLT entry for this symbol. This
1646 happens when statically linking PIC code, or when
1647 using -Bsymbolic. */
1651 relocation
= (htab
->etab
.splt
->output_section
->vma
1652 + htab
->etab
.splt
->output_offset
1653 + hh
->eh
.plt
.offset
);
1655 case R_METAG_HI16_GOTPC
:
1656 case R_METAG_LO16_GOTPC
:
1657 BFD_ASSERT (htab
->etab
.sgot
!= NULL
);
1659 relocation
= (htab
->etab
.sgot
->output_section
->vma
+
1660 htab
->etab
.sgot
->output_offset
);
1661 relocation
+= GOT_REG_OFFSET
;
1662 relocation
-= (input_section
->output_section
->vma
1663 + input_section
->output_offset
1666 case R_METAG_HI16_GOTOFF
:
1667 case R_METAG_LO16_GOTOFF
:
1668 case R_METAG_GETSET_GOTOFF
:
1669 BFD_ASSERT (htab
->etab
.sgot
!= NULL
);
1671 relocation
-= (htab
->etab
.sgot
->output_section
->vma
+
1672 htab
->etab
.sgot
->output_offset
);
1673 relocation
-= GOT_REG_OFFSET
;
1675 case R_METAG_GETSET_GOT
:
1678 bfd_boolean do_got
= 0;
1680 /* Relocation is to the entry for this symbol in the
1681 global offset table. */
1686 off
= hh
->eh
.got
.offset
;
1687 dyn
= htab
->etab
.dynamic_sections_created
;
1688 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1689 bfd_link_pic (info
),
1692 /* If we aren't going to call finish_dynamic_symbol,
1693 then we need to handle initialisation of the .got
1694 entry and create needed relocs here. Since the
1695 offset must always be a multiple of 4, we use the
1696 least significant bit to record whether we have
1697 initialised it already. */
1702 hh
->eh
.got
.offset
|= 1;
1709 /* Local symbol case. */
1710 if (local_got_offsets
== NULL
)
1713 off
= local_got_offsets
[r_symndx
];
1715 /* The offset must always be a multiple of 4. We use
1716 the least significant bit to record whether we have
1717 already generated the necessary reloc. */
1722 local_got_offsets
[r_symndx
] |= 1;
1729 if (bfd_link_pic (info
))
1731 /* Output a dynamic relocation for this GOT entry.
1732 In this case it is relative to the base of the
1733 object because the symbol index is zero. */
1734 Elf_Internal_Rela outrel
;
1736 asection
*s
= htab
->etab
.srelgot
;
1738 outrel
.r_offset
= (off
1739 + htab
->etab
.sgot
->output_offset
1740 + htab
->etab
.sgot
->output_section
->vma
);
1741 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
1742 outrel
.r_addend
= relocation
;
1744 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1745 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1748 bfd_put_32 (output_bfd
, relocation
,
1749 htab
->etab
.sgot
->contents
+ off
);
1752 if (off
>= (bfd_vma
) -2)
1755 relocation
= off
- GOT_REG_OFFSET
;
1758 case R_METAG_TLS_GD
:
1759 case R_METAG_TLS_IE
:
1761 /* XXXMJF There is room here for optimisations. For example
1762 converting from GD->IE, etc. */
1767 if (htab
->etab
.sgot
== NULL
)
1774 dyn
= htab
->etab
.dynamic_sections_created
;
1776 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1777 bfd_link_pic (info
),
1779 && (!bfd_link_pic (info
)
1780 || !SYMBOL_REFERENCES_LOCAL (info
, &hh
->eh
)))
1782 indx
= hh
->eh
.dynindx
;
1784 off
= hh
->eh
.got
.offset
;
1785 tls_type
= hh
->tls_type
;
1789 /* Local symbol case. */
1790 if (local_got_offsets
== NULL
)
1793 off
= local_got_offsets
[r_symndx
];
1794 tls_type
= metag_elf_local_got_tls_type (input_bfd
) [r_symndx
];
1797 if (tls_type
== GOT_UNKNOWN
)
1804 bfd_boolean need_relocs
= FALSE
;
1805 Elf_Internal_Rela outrel
;
1806 bfd_byte
*loc
= NULL
;
1809 /* The GOT entries have not been initialized yet. Do it
1810 now, and emit any relocations. If both an IE GOT and a
1811 GD GOT are necessary, we emit the GD first. */
1813 if ((bfd_link_pic (info
) || indx
!= 0)
1815 || ELF_ST_VISIBILITY (hh
->eh
.other
) == STV_DEFAULT
1816 || hh
->eh
.root
.type
!= bfd_link_hash_undefweak
))
1819 loc
= htab
->etab
.srelgot
->contents
;
1820 /* FIXME (CAO): Should this be reloc_count++ ? */
1821 loc
+= htab
->etab
.srelgot
->reloc_count
* sizeof (Elf32_External_Rela
);
1824 if (tls_type
& GOT_TLS_GD
)
1828 outrel
.r_offset
= (cur_off
1829 + htab
->etab
.sgot
->output_section
->vma
1830 + htab
->etab
.sgot
->output_offset
);
1831 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_DTPMOD
);
1832 outrel
.r_addend
= 0;
1833 bfd_put_32 (output_bfd
, 0, htab
->etab
.sgot
->contents
+ cur_off
);
1835 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1836 htab
->etab
.srelgot
->reloc_count
++;
1837 loc
+= sizeof (Elf32_External_Rela
);
1840 bfd_put_32 (output_bfd
, 0,
1841 htab
->etab
.sgot
->contents
+ cur_off
+ 4);
1844 bfd_put_32 (output_bfd
, 0,
1845 htab
->etab
.sgot
->contents
+ cur_off
+ 4);
1846 outrel
.r_info
= ELF32_R_INFO (indx
,
1847 R_METAG_TLS_DTPOFF
);
1848 outrel
.r_offset
+= 4;
1849 bfd_elf32_swap_reloca_out (output_bfd
,
1851 htab
->etab
.srelgot
->reloc_count
++;
1852 loc
+= sizeof (Elf32_External_Rela
);
1857 /* We don't support changing the TLS model. */
1859 if (bfd_link_pic (info
))
1860 _bfd_error_handler (_("%pB(%pA): multiple TLS models are not supported"),
1861 input_bfd
, input_section
);
1863 _bfd_error_handler (_("%pB(%pA): shared library symbol %s encountered whilst performing a static link"),
1864 input_bfd
, input_section
, name
);
1871 if (tls_type
& GOT_TLS_IE
)
1875 outrel
.r_offset
= (cur_off
1876 + htab
->etab
.sgot
->output_section
->vma
1877 + htab
->etab
.sgot
->output_offset
);
1878 outrel
.r_info
= ELF32_R_INFO (indx
, R_METAG_TLS_TPOFF
);
1881 outrel
.r_addend
= relocation
- dtpoff_base (info
);
1883 outrel
.r_addend
= 0;
1885 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1886 htab
->etab
.srelgot
->reloc_count
++;
1887 loc
+= sizeof (Elf32_External_Rela
);
1890 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
1891 htab
->etab
.sgot
->contents
+ cur_off
);
1897 hh
->eh
.got
.offset
|= 1;
1899 local_got_offsets
[r_symndx
] |= 1;
1902 /* Add the base of the GOT to the relocation value. */
1903 relocation
= off
- GOT_REG_OFFSET
;
1908 case R_METAG_TLS_IENONPIC_HI16
:
1909 case R_METAG_TLS_IENONPIC_LO16
:
1910 case R_METAG_TLS_LE_HI16
:
1911 case R_METAG_TLS_LE_LO16
:
1912 if (bfd_link_pic (info
))
1915 /* xgettext:c-format */
1916 (_("%pB(%pA+%#Lx): %s relocation not permitted in shared object"),
1917 input_bfd
, input_section
, rel
->r_offset
, howto
->name
);
1921 relocation
= tpoff (info
, relocation
);
1923 case R_METAG_TLS_LDO_HI16
:
1924 case R_METAG_TLS_LDO_LO16
:
1925 if (! bfd_link_pic (info
))
1926 relocation
= tpoff (info
, relocation
);
1928 relocation
-= dtpoff_base (info
);
1930 case R_METAG_TLS_LDM
:
1934 if (htab
->etab
.sgot
== NULL
)
1936 off
= htab
->tls_ldm_got
.offset
;
1941 Elf_Internal_Rela outrel
;
1944 outrel
.r_offset
= (off
1945 + htab
->etab
.sgot
->output_section
->vma
1946 + htab
->etab
.sgot
->output_offset
);
1948 outrel
.r_addend
= 0;
1949 outrel
.r_info
= ELF32_R_INFO (0, R_METAG_TLS_DTPMOD
);
1950 loc
= htab
->etab
.srelgot
->contents
;
1951 loc
+= htab
->etab
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1952 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1953 htab
->tls_ldm_got
.offset
|= 1;
1956 relocation
= off
- GOT_REG_OFFSET
;
1963 r
= metag_final_link_relocate (howto
, input_bfd
, input_section
,
1964 contents
, rel
, relocation
, hh
, htab
,
1967 if (r
!= bfd_reloc_ok
)
1969 const char * msg
= (const char *) NULL
;
1973 case bfd_reloc_overflow
:
1974 (*info
->callbacks
->reloc_overflow
)
1975 (info
, (hh
? &hh
->eh
.root
: NULL
), name
, howto
->name
,
1976 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1979 case bfd_reloc_undefined
:
1980 (*info
->callbacks
->undefined_symbol
)
1981 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
1984 case bfd_reloc_outofrange
:
1985 msg
= _("internal error: out of range error");
1988 case bfd_reloc_notsupported
:
1989 msg
= _("internal error: unsupported relocation error");
1992 case bfd_reloc_dangerous
:
1993 msg
= _("internal error: dangerous relocation");
1997 msg
= _("internal error: unknown error");
2002 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
2003 input_section
, rel
->r_offset
);
2010 /* Create the .plt and .got sections, and set up our hash table
2011 short-cuts to various dynamic sections. */
2014 elf_metag_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
2016 struct elf_metag_link_hash_table
*htab
;
2017 struct elf_link_hash_entry
*eh
;
2018 struct bfd_link_hash_entry
*bh
;
2019 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2021 /* Don't try to create the .plt and .got twice. */
2022 htab
= metag_link_hash_table (info
);
2023 if (htab
->etab
.splt
!= NULL
)
2026 /* Call the generic code to do most of the work. */
2027 if (! _bfd_elf_create_dynamic_sections (abfd
, info
))
2030 /* The header goes at the start of the dynamic .got section, which
2031 is placed after the dynamic .got.plt section. ie. The header is
2032 not necessarily at the start of the output .got section. */
2033 htab
->etab
.sgot
->size
+= 12;
2035 /* Define the symbol __GLOBAL_OFFSET_TABLE__ on the header. */
2037 if (!(_bfd_generic_link_add_one_symbol
2038 (info
, abfd
, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL
, htab
->etab
.sgot
,
2039 (bfd_vma
) 0, NULL
, FALSE
, bed
->collect
, &bh
)))
2041 eh
= (struct elf_link_hash_entry
*) bh
;
2042 eh
->def_regular
= 1;
2043 eh
->type
= STT_OBJECT
;
2044 eh
->other
= STV_HIDDEN
;
2046 if (! bfd_link_executable (info
)
2047 && ! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2050 htab
->etab
.hgot
= eh
;
2055 /* Look through the relocs for a section during the first phase, and
2056 calculate needed space in the global offset table, procedure linkage
2057 table, and dynamic reloc sections. At this point we haven't
2058 necessarily read all the input files. */
2061 elf_metag_check_relocs (bfd
*abfd
,
2062 struct bfd_link_info
*info
,
2064 const Elf_Internal_Rela
*relocs
)
2066 Elf_Internal_Shdr
*symtab_hdr
;
2067 struct elf_link_hash_entry
**eh_syms
;
2068 const Elf_Internal_Rela
*rel
;
2069 const Elf_Internal_Rela
*rel_end
;
2070 struct elf_metag_link_hash_table
*htab
;
2073 int tls_type
= GOT_UNKNOWN
, old_tls_type
= GOT_UNKNOWN
;
2075 if (bfd_link_relocatable (info
))
2078 htab
= metag_link_hash_table (info
);
2079 dynobj
= htab
->etab
.dynobj
;
2080 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2081 eh_syms
= elf_sym_hashes (abfd
);
2087 rel_end
= relocs
+ sec
->reloc_count
;
2088 for (rel
= relocs
; rel
< rel_end
; rel
++)
2091 struct elf_metag_link_hash_entry
*hh
;
2092 Elf_Internal_Sym
*isym
;
2093 unsigned long r_symndx
;
2095 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2096 r_type
= ELF32_R_TYPE (rel
->r_info
);
2097 if (r_symndx
< symtab_hdr
->sh_info
)
2099 /* A local symbol. */
2100 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2111 hh
= (struct elf_metag_link_hash_entry
*)
2112 eh_syms
[r_symndx
- symtab_hdr
->sh_info
];
2113 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
2114 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
2115 hh
= (struct elf_metag_link_hash_entry
*) hh
->eh
.root
.u
.i
.link
;
2118 /* Some relocs require a global offset table. */
2119 if (htab
->etab
.sgot
== NULL
)
2123 case R_METAG_TLS_GD
:
2124 case R_METAG_TLS_LDM
:
2125 case R_METAG_TLS_IE
:
2126 if (bfd_link_pic (info
))
2127 info
->flags
|= DF_STATIC_TLS
;
2130 case R_METAG_HI16_GOTOFF
:
2131 case R_METAG_LO16_GOTOFF
:
2132 case R_METAG_GETSET_GOTOFF
:
2133 case R_METAG_GETSET_GOT
:
2134 case R_METAG_HI16_GOTPC
:
2135 case R_METAG_LO16_GOTPC
:
2137 htab
->etab
.dynobj
= dynobj
= abfd
;
2138 if (!elf_metag_create_dynamic_sections (dynobj
, info
))
2149 case R_METAG_TLS_IE
:
2150 case R_METAG_TLS_GD
:
2151 case R_METAG_GETSET_GOT
:
2155 tls_type
= GOT_NORMAL
;
2157 case R_METAG_TLS_IE
:
2158 tls_type
= GOT_TLS_IE
;
2160 case R_METAG_TLS_GD
:
2161 tls_type
= GOT_TLS_GD
;
2167 hh
->eh
.got
.refcount
+= 1;
2168 old_tls_type
= hh
->tls_type
;
2172 bfd_signed_vma
*local_got_refcounts
;
2174 /* This is a global offset table entry for a local
2176 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2177 if (local_got_refcounts
== NULL
)
2181 size
= symtab_hdr
->sh_info
;
2182 size
*= sizeof (bfd_signed_vma
);
2183 /* Add in space to store the local GOT TLS types. */
2184 size
+= symtab_hdr
->sh_info
;
2185 local_got_refcounts
= ((bfd_signed_vma
*)
2186 bfd_zalloc (abfd
, size
));
2187 if (local_got_refcounts
== NULL
)
2189 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2190 memset (metag_elf_local_got_tls_type (abfd
),
2191 GOT_UNKNOWN
, symtab_hdr
->sh_info
);
2193 local_got_refcounts
[r_symndx
] += 1;
2194 old_tls_type
= metag_elf_local_got_tls_type (abfd
) [r_symndx
];
2197 if (old_tls_type
!= tls_type
)
2201 hh
->tls_type
= tls_type
;
2205 metag_elf_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2211 case R_METAG_TLS_LDM
:
2212 metag_link_hash_table (info
)->tls_ldm_got
.refcount
+= 1;
2215 case R_METAG_RELBRANCH_PLT
:
2216 /* This symbol requires a procedure linkage table entry. We
2217 actually build the entry in adjust_dynamic_symbol,
2218 because this might be a case of linking PIC code without
2219 linking in any dynamic objects, in which case we don't
2220 need to generate a procedure linkage table after all. */
2222 /* If this is a local symbol, we resolve it directly without
2223 creating a procedure linkage table entry. */
2227 if (hh
->eh
.forced_local
)
2230 hh
->eh
.needs_plt
= 1;
2231 hh
->eh
.plt
.refcount
+= 1;
2234 case R_METAG_HIADDR16
:
2235 case R_METAG_LOADDR16
:
2236 /* Let's help debug shared library creation. These relocs
2237 cannot be used in shared libs. Don't error out for
2238 sections we don't care about, such as debug sections or
2239 non-constant sections. */
2240 if (bfd_link_pic (info
)
2241 && (sec
->flags
& SEC_ALLOC
) != 0
2242 && (sec
->flags
& SEC_READONLY
) != 0)
2247 name
= hh
->eh
.root
.root
.string
;
2249 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
2251 /* xgettext:c-format */
2252 (_("%pB: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
2253 abfd
, elf_metag_howto_table
[r_type
].name
, name
);
2254 bfd_set_error (bfd_error_bad_value
);
2259 case R_METAG_ADDR32
:
2260 case R_METAG_RELBRANCH
:
2261 case R_METAG_GETSETOFF
:
2262 if (hh
!= NULL
&& !bfd_link_pic (info
))
2264 hh
->eh
.non_got_ref
= 1;
2265 hh
->eh
.plt
.refcount
+= 1;
2268 /* If we are creating a shared library, and this is a reloc
2269 against a global symbol, or a non PC relative reloc
2270 against a local symbol, then we need to copy the reloc
2271 into the shared library. However, if we are linking with
2272 -Bsymbolic, we do not need to copy a reloc against a
2273 global symbol which is defined in an object we are
2274 including in the link (i.e., DEF_REGULAR is set). At
2275 this point we have not seen all the input files, so it is
2276 possible that DEF_REGULAR is not set now but will be set
2277 later (it is never cleared). We account for that
2278 possibility below by storing information in the
2279 dyn_relocs field of the hash table entry. A similar
2280 situation occurs when creating shared libraries and symbol
2281 visibility changes render the symbol local.
2283 If on the other hand, we are creating an executable, we
2284 may need to keep relocations for symbols satisfied by a
2285 dynamic library if we manage to avoid copy relocs for the
2287 if ((bfd_link_pic (info
)
2288 && (sec
->flags
& SEC_ALLOC
) != 0
2289 && (r_type
!= R_METAG_RELBRANCH
2291 && (! info
->symbolic
2292 || hh
->eh
.root
.type
== bfd_link_hash_defweak
2293 || !hh
->eh
.def_regular
))))
2294 || (!bfd_link_pic (info
)
2295 && (sec
->flags
& SEC_ALLOC
) != 0
2297 && (hh
->eh
.root
.type
== bfd_link_hash_defweak
2298 || !hh
->eh
.def_regular
)))
2300 struct elf_dyn_relocs
*hdh_p
;
2301 struct elf_dyn_relocs
**hdh_head
;
2304 htab
->etab
.dynobj
= dynobj
= abfd
;
2306 /* When creating a shared object, we must copy these
2307 relocs into the output file. We create a reloc
2308 section in dynobj and make room for the reloc. */
2311 sreloc
= _bfd_elf_make_dynamic_reloc_section
2312 (sec
, htab
->etab
.dynobj
, 2, abfd
, /*rela?*/ TRUE
);
2316 bfd_set_error (bfd_error_bad_value
);
2320 elf_section_data (sec
)->sreloc
= sreloc
;
2323 /* If this is a global symbol, we count the number of
2324 relocations we need for this symbol. */
2326 hdh_head
= &((struct elf_metag_link_hash_entry
*) hh
)->dyn_relocs
;
2329 /* Track dynamic relocs needed for local syms too. */
2333 sr
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2337 vpp
= &elf_section_data (sr
)->local_dynrel
;
2338 hdh_head
= (struct elf_dyn_relocs
**) vpp
;
2342 if (hdh_p
== NULL
|| hdh_p
->sec
!= sec
)
2344 hdh_p
= ((struct elf_dyn_relocs
*)
2345 bfd_alloc (dynobj
, sizeof *hdh_p
));
2348 hdh_p
->next
= *hdh_head
;
2352 hdh_p
->pc_count
= 0;
2356 if (ELF32_R_TYPE (rel
->r_info
) == R_METAG_RELBRANCH
)
2357 hdh_p
->pc_count
+= 1;
2361 /* This relocation describes the C++ object vtable hierarchy.
2362 Reconstruct it for later use during GC. */
2363 case R_METAG_GNU_VTINHERIT
:
2364 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, &hh
->eh
,
2369 /* This relocation describes which C++ vtable entries are actually
2370 used. Record for later use during GC. */
2371 case R_METAG_GNU_VTENTRY
:
2372 BFD_ASSERT (hh
!= NULL
);
2374 && !bfd_elf_gc_record_vtentry (abfd
, sec
, &hh
->eh
, rel
->r_addend
))
2383 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2386 elf_metag_copy_indirect_symbol (struct bfd_link_info
*info
,
2387 struct elf_link_hash_entry
*eh_dir
,
2388 struct elf_link_hash_entry
*eh_ind
)
2390 struct elf_metag_link_hash_entry
*hh_dir
, *hh_ind
;
2392 hh_dir
= metag_elf_hash_entry (eh_dir
);
2393 hh_ind
= metag_elf_hash_entry (eh_ind
);
2395 if (hh_ind
->dyn_relocs
!= NULL
)
2397 if (hh_dir
->dyn_relocs
!= NULL
)
2399 struct elf_dyn_relocs
**hdh_pp
;
2400 struct elf_dyn_relocs
*hdh_p
;
2402 if (eh_ind
->root
.type
== bfd_link_hash_indirect
)
2405 /* Add reloc counts against the weak sym to the strong sym
2406 list. Merge any entries against the same section. */
2407 for (hdh_pp
= &hh_ind
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2409 struct elf_dyn_relocs
*hdh_q
;
2411 for (hdh_q
= hh_dir
->dyn_relocs
; hdh_q
!= NULL
;
2412 hdh_q
= hdh_q
->next
)
2413 if (hdh_q
->sec
== hdh_p
->sec
)
2415 hdh_q
->pc_count
+= hdh_p
->pc_count
;
2416 hdh_q
->count
+= hdh_p
->count
;
2417 *hdh_pp
= hdh_p
->next
;
2421 hdh_pp
= &hdh_p
->next
;
2423 *hdh_pp
= hh_dir
->dyn_relocs
;
2426 hh_dir
->dyn_relocs
= hh_ind
->dyn_relocs
;
2427 hh_ind
->dyn_relocs
= NULL
;
2430 if (eh_ind
->root
.type
== bfd_link_hash_indirect
2431 && eh_dir
->got
.refcount
<= 0)
2433 hh_dir
->tls_type
= hh_ind
->tls_type
;
2434 hh_ind
->tls_type
= GOT_UNKNOWN
;
2437 _bfd_elf_link_hash_copy_indirect (info
, eh_dir
, eh_ind
);
2440 /* Find dynamic relocs for H that apply to read-only sections. */
2443 readonly_dynrelocs (struct elf_link_hash_entry
*h
)
2445 struct elf_dyn_relocs
*p
;
2447 for (p
= metag_elf_hash_entry (h
)->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2449 asection
*s
= p
->sec
->output_section
;
2451 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2457 /* Adjust a symbol defined by a dynamic object and referenced by a
2458 regular object. The current definition is in some section of the
2459 dynamic object, but we're not including those sections. We have to
2460 change the definition to something the rest of the link can
2464 elf_metag_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2465 struct elf_link_hash_entry
*eh
)
2467 struct elf_metag_link_hash_table
*htab
;
2470 /* If this is a function, put it in the procedure linkage table. We
2471 will fill in the contents of the procedure linkage table later,
2472 when we know the address of the .got section. */
2473 if (eh
->type
== STT_FUNC
2476 if (eh
->plt
.refcount
<= 0
2477 || SYMBOL_CALLS_LOCAL (info
, eh
)
2478 || (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
2479 && eh
->root
.type
== bfd_link_hash_undefweak
))
2481 /* This case can occur if we saw a PLT reloc in an input
2482 file, but the symbol was never referred to by a dynamic
2483 object. In such a case, we don't actually need to build
2484 a procedure linkage table, and we can just do a PCREL
2486 eh
->plt
.offset
= (bfd_vma
) -1;
2493 eh
->plt
.offset
= (bfd_vma
) -1;
2495 /* If this is a weak symbol, and there is a real definition, the
2496 processor independent code will have arranged for us to see the
2497 real definition first, and we can just use the same value. */
2498 if (eh
->is_weakalias
)
2500 struct elf_link_hash_entry
*def
= weakdef (eh
);
2501 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
2502 eh
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
2503 eh
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
2504 eh
->non_got_ref
= def
->non_got_ref
;
2508 /* This is a reference to a symbol defined by a dynamic object which
2509 is not a function. */
2511 /* If we are creating a shared library, we must presume that the
2512 only references to the symbol are via the global offset table.
2513 For such cases we need not do anything here; the relocations will
2514 be handled correctly by relocate_section. */
2515 if (bfd_link_pic (info
))
2518 /* If there are no references to this symbol that do not use the
2519 GOT, we don't need to generate a copy reloc. */
2520 if (!eh
->non_got_ref
)
2523 /* If -z nocopyreloc was given, we won't generate them either. */
2524 if (info
->nocopyreloc
)
2526 eh
->non_got_ref
= 0;
2530 /* If we don't find any dynamic relocs in read-only sections, then
2531 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2532 if (!readonly_dynrelocs (eh
))
2534 eh
->non_got_ref
= 0;
2538 /* We must allocate the symbol in our .dynbss section, which will
2539 become part of the .bss section of the executable. There will be
2540 an entry for this symbol in the .dynsym section. The dynamic
2541 object will contain position independent code, so all references
2542 from the dynamic object to this symbol will go through the global
2543 offset table. The dynamic linker will use the .dynsym entry to
2544 determine the address it must put in the global offset table, so
2545 both the dynamic object and the regular object will refer to the
2546 same memory location for the variable. */
2548 htab
= metag_link_hash_table (info
);
2550 /* We must generate a COPY reloc to tell the dynamic linker to
2551 copy the initial value out of the dynamic object and into the
2552 runtime process image. */
2553 if ((eh
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2555 s
= htab
->etab
.sdynrelro
;
2556 srel
= htab
->etab
.sreldynrelro
;
2560 s
= htab
->etab
.sdynbss
;
2561 srel
= htab
->etab
.srelbss
;
2563 if ((eh
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && eh
->size
!= 0)
2565 srel
->size
+= sizeof (Elf32_External_Rela
);
2569 return _bfd_elf_adjust_dynamic_copy (info
, eh
, s
);
2572 /* Allocate space in .plt, .got and associated reloc sections for
2576 allocate_dynrelocs (struct elf_link_hash_entry
*eh
, void *inf
)
2578 struct bfd_link_info
*info
;
2579 struct elf_metag_link_hash_table
*htab
;
2580 struct elf_metag_link_hash_entry
*hh
;
2581 struct elf_dyn_relocs
*hdh_p
;
2583 if (eh
->root
.type
== bfd_link_hash_indirect
)
2586 if (eh
->root
.type
== bfd_link_hash_warning
)
2587 eh
= (struct elf_link_hash_entry
*) eh
->root
.u
.i
.link
;
2590 htab
= metag_link_hash_table (info
);
2592 if (htab
->etab
.dynamic_sections_created
2593 && eh
->plt
.refcount
> 0)
2595 /* Make sure this symbol is output as a dynamic symbol.
2596 Undefined weak syms won't yet be marked as dynamic. */
2597 if (eh
->dynindx
== -1
2598 && !eh
->forced_local
)
2600 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2604 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), eh
))
2606 asection
*s
= htab
->etab
.splt
;
2608 /* If this is the first .plt entry, make room for the special
2611 s
->size
+= PLT_ENTRY_SIZE
;
2613 eh
->plt
.offset
= s
->size
;
2615 /* If this symbol is not defined in a regular file, and we are
2616 not generating a shared library, then set the symbol to this
2617 location in the .plt. This is required to make function
2618 pointers compare as equal between the normal executable and
2619 the shared library. */
2620 if (! bfd_link_pic (info
)
2621 && !eh
->def_regular
)
2623 eh
->root
.u
.def
.section
= s
;
2624 eh
->root
.u
.def
.value
= eh
->plt
.offset
;
2627 /* Make room for this entry. */
2628 s
->size
+= PLT_ENTRY_SIZE
;
2630 /* We also need to make an entry in the .got.plt section, which
2631 will be placed in the .got section by the linker script. */
2632 htab
->etab
.sgotplt
->size
+= 4;
2634 /* We also need to make an entry in the .rel.plt section. */
2635 htab
->etab
.srelplt
->size
+= sizeof (Elf32_External_Rela
);
2639 eh
->plt
.offset
= (bfd_vma
) -1;
2645 eh
->plt
.offset
= (bfd_vma
) -1;
2649 if (eh
->got
.refcount
> 0)
2653 int tls_type
= metag_elf_hash_entry (eh
)->tls_type
;
2655 /* Make sure this symbol is output as a dynamic symbol.
2656 Undefined weak syms won't yet be marked as dynamic. */
2657 if (eh
->dynindx
== -1
2658 && !eh
->forced_local
)
2660 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2664 s
= htab
->etab
.sgot
;
2666 eh
->got
.offset
= s
->size
;
2668 /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */
2669 if (tls_type
== GOT_TLS_GD
)
2671 dyn
= htab
->etab
.dynamic_sections_created
;
2672 /* R_METAG_TLS_IE needs one dynamic relocation if dynamic,
2673 R_METAG_TLS_GD needs one if local symbol and two if global. */
2674 if ((tls_type
== GOT_TLS_GD
&& eh
->dynindx
== -1)
2675 || (tls_type
== GOT_TLS_IE
&& dyn
))
2676 htab
->etab
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
2677 else if (tls_type
== GOT_TLS_GD
)
2678 htab
->etab
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rela
);
2679 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2680 bfd_link_pic (info
),
2682 htab
->etab
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
2685 eh
->got
.offset
= (bfd_vma
) -1;
2687 hh
= (struct elf_metag_link_hash_entry
*) eh
;
2688 if (hh
->dyn_relocs
== NULL
)
2691 /* If this is a -Bsymbolic shared link, then we need to discard all
2692 space allocated for dynamic pc-relative relocs against symbols
2693 defined in a regular object. For the normal shared case, discard
2694 space for relocs that have become local due to symbol visibility
2696 if (bfd_link_pic (info
))
2698 if (SYMBOL_CALLS_LOCAL (info
, eh
))
2700 struct elf_dyn_relocs
**hdh_pp
;
2702 for (hdh_pp
= &hh
->dyn_relocs
; (hdh_p
= *hdh_pp
) != NULL
; )
2704 hdh_p
->count
-= hdh_p
->pc_count
;
2705 hdh_p
->pc_count
= 0;
2706 if (hdh_p
->count
== 0)
2707 *hdh_pp
= hdh_p
->next
;
2709 hdh_pp
= &hdh_p
->next
;
2713 /* Also discard relocs on undefined weak syms with non-default
2715 if (hh
->dyn_relocs
!= NULL
2716 && eh
->root
.type
== bfd_link_hash_undefweak
)
2718 if (ELF_ST_VISIBILITY (eh
->other
) != STV_DEFAULT
)
2719 hh
->dyn_relocs
= NULL
;
2721 /* Make sure undefined weak symbols are output as a dynamic
2723 else if (eh
->dynindx
== -1
2724 && !eh
->forced_local
)
2726 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2733 /* For the non-shared case, discard space for relocs against
2734 symbols which turn out to need copy relocs or are not
2736 if (!eh
->non_got_ref
2737 && ((eh
->def_dynamic
2738 && !eh
->def_regular
)
2739 || (htab
->etab
.dynamic_sections_created
2740 && (eh
->root
.type
== bfd_link_hash_undefweak
2741 || eh
->root
.type
== bfd_link_hash_undefined
))))
2743 /* Make sure this symbol is output as a dynamic symbol.
2744 Undefined weak syms won't yet be marked as dynamic. */
2745 if (eh
->dynindx
== -1
2746 && !eh
->forced_local
)
2748 if (! bfd_elf_link_record_dynamic_symbol (info
, eh
))
2752 /* If that succeeded, we know we'll be keeping all the
2754 if (eh
->dynindx
!= -1)
2758 hh
->dyn_relocs
= NULL
;
2764 /* Finally, allocate space. */
2765 for (hdh_p
= hh
->dyn_relocs
; hdh_p
!= NULL
; hdh_p
= hdh_p
->next
)
2767 asection
*sreloc
= elf_section_data (hdh_p
->sec
)->sreloc
;
2768 sreloc
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2774 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
2775 read-only sections. */
2778 maybe_set_textrel (struct elf_link_hash_entry
*h
, void *info_p
)
2782 if (h
->root
.type
== bfd_link_hash_indirect
)
2785 sec
= readonly_dynrelocs (h
);
2788 struct bfd_link_info
*info
= (struct bfd_link_info
*) info_p
;
2790 info
->flags
|= DF_TEXTREL
;
2791 info
->callbacks
->minfo
2792 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
2793 sec
->owner
, h
->root
.root
.string
, sec
);
2795 /* Not an error, just cut short the traversal. */
2801 /* Set the sizes of the dynamic sections. */
2804 elf_metag_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2805 struct bfd_link_info
*info
)
2807 struct elf_metag_link_hash_table
*htab
;
2813 htab
= metag_link_hash_table (info
);
2814 dynobj
= htab
->etab
.dynobj
;
2818 if (htab
->etab
.dynamic_sections_created
)
2820 /* Set the contents of the .interp section to the interpreter. */
2821 if (bfd_link_executable (info
) && !info
->nointerp
)
2823 s
= bfd_get_linker_section (dynobj
, ".interp");
2826 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2827 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2831 /* Set up .got offsets for local syms, and space for local dynamic
2833 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2835 bfd_signed_vma
*local_got
;
2836 bfd_signed_vma
*end_local_got
;
2837 bfd_size_type locsymcount
;
2838 Elf_Internal_Shdr
*symtab_hdr
;
2840 char *local_tls_type
;
2842 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2845 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2847 struct elf_dyn_relocs
*hdh_p
;
2849 for (hdh_p
= ((struct elf_dyn_relocs
*)
2850 elf_section_data (s
)->local_dynrel
);
2852 hdh_p
= hdh_p
->next
)
2854 if (!bfd_is_abs_section (hdh_p
->sec
)
2855 && bfd_is_abs_section (hdh_p
->sec
->output_section
))
2857 /* Input section has been discarded, either because
2858 it is a copy of a linkonce section or due to
2859 linker script /DISCARD/, so we'll be discarding
2862 else if (hdh_p
->count
!= 0)
2864 srel
= elf_section_data (hdh_p
->sec
)->sreloc
;
2865 srel
->size
+= hdh_p
->count
* sizeof (Elf32_External_Rela
);
2866 if ((hdh_p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2867 info
->flags
|= DF_TEXTREL
;
2872 local_got
= elf_local_got_refcounts (ibfd
);
2876 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2877 locsymcount
= symtab_hdr
->sh_info
;
2878 end_local_got
= local_got
+ locsymcount
;
2879 local_tls_type
= metag_elf_local_got_tls_type (ibfd
);
2880 s
= htab
->etab
.sgot
;
2881 srel
= htab
->etab
.srelgot
;
2882 for (; local_got
< end_local_got
; ++local_got
)
2886 *local_got
= s
->size
;
2887 s
->size
+= GOT_ENTRY_SIZE
;
2888 /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */
2889 if (*local_tls_type
== GOT_TLS_GD
)
2891 if (bfd_link_pic (info
))
2892 srel
->size
+= sizeof (Elf32_External_Rela
);
2895 *local_got
= (bfd_vma
) -1;
2900 if (htab
->tls_ldm_got
.refcount
> 0)
2902 /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM
2904 htab
->tls_ldm_got
.offset
= htab
->etab
.sgot
->size
;
2905 htab
->etab
.sgot
->size
+= 8;
2906 htab
->etab
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
2909 htab
->tls_ldm_got
.offset
= -1;
2911 /* Allocate global sym .plt and .got entries, and space for global
2912 sym dynamic relocs. */
2913 elf_link_hash_traverse (&htab
->etab
, allocate_dynrelocs
, info
);
2915 /* We now have determined the sizes of the various dynamic sections.
2916 Allocate memory for them. */
2918 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2920 bfd_boolean reloc_section
= FALSE
;
2922 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2925 if (s
== htab
->etab
.splt
2926 || s
== htab
->etab
.sgot
2927 || s
== htab
->etab
.sgotplt
2928 || s
== htab
->etab
.sdynbss
2929 || s
== htab
->etab
.sdynrelro
)
2931 /* Strip this section if we don't need it; see the
2934 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2936 if (s
->size
!= 0 && s
!= htab
->etab
.srelplt
)
2939 /* We use the reloc_count field as a counter if we need
2940 to copy relocs into the output file. */
2942 reloc_section
= TRUE
;
2946 /* It's not one of our sections, so don't allocate space. */
2952 /* If we don't need this section, strip it from the
2953 output file. This is mostly to handle .rela.bss and
2954 .rela.plt. We must create both sections in
2955 create_dynamic_sections, because they must be created
2956 before the linker maps input sections to output
2957 sections. The linker does that before
2958 adjust_dynamic_symbol is called, and it is that
2959 function which decides whether anything needs to go
2960 into these sections. */
2961 s
->flags
|= SEC_EXCLUDE
;
2965 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2968 /* Allocate memory for the section contents. */
2969 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2970 if (s
->contents
== NULL
)
2972 else if (reloc_section
)
2974 unsigned char *contents
= s
->contents
;
2975 Elf32_External_Rela reloc
;
2977 /* Fill the reloc section with a R_METAG_NONE type reloc. */
2978 memset(&reloc
, 0, sizeof(Elf32_External_Rela
));
2979 reloc
.r_info
[0] = R_METAG_NONE
;
2980 for (; contents
< (s
->contents
+ s
->size
);
2981 contents
+= sizeof(Elf32_External_Rela
))
2983 memcpy(contents
, &reloc
, sizeof(Elf32_External_Rela
));
2988 if (htab
->etab
.dynamic_sections_created
)
2990 /* Add some entries to the .dynamic section. We fill in the
2991 values later, in elf_metag_finish_dynamic_sections, but we
2992 must add the entries now so that we get the correct size for
2993 the .dynamic section. The DT_DEBUG entry is filled in by the
2994 dynamic linker and used by the debugger. */
2995 #define add_dynamic_entry(TAG, VAL) \
2996 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2998 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3001 if (bfd_link_executable (info
))
3003 if (!add_dynamic_entry (DT_DEBUG
, 0))
3007 if (htab
->etab
.srelplt
->size
!= 0)
3009 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3010 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3011 || !add_dynamic_entry (DT_JMPREL
, 0))
3017 if (!add_dynamic_entry (DT_RELA
, 0)
3018 || !add_dynamic_entry (DT_RELASZ
, 0)
3019 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3022 /* If any dynamic relocs apply to a read-only section,
3023 then we need a DT_TEXTREL entry. */
3024 if ((info
->flags
& DF_TEXTREL
) == 0)
3025 elf_link_hash_traverse (&htab
->etab
, maybe_set_textrel
, info
);
3027 if ((info
->flags
& DF_TEXTREL
) != 0)
3029 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3034 #undef add_dynamic_entry
3039 /* Finish up dynamic symbol handling. We set the contents of various
3040 dynamic sections here. */
3043 elf_metag_finish_dynamic_symbol (bfd
*output_bfd
,
3044 struct bfd_link_info
*info
,
3045 struct elf_link_hash_entry
*eh
,
3046 Elf_Internal_Sym
*sym
)
3048 struct elf_metag_link_hash_table
*htab
;
3049 Elf_Internal_Rela rel
;
3052 htab
= metag_link_hash_table (info
);
3054 if (eh
->plt
.offset
!= (bfd_vma
) -1)
3064 if (eh
->plt
.offset
& 1)
3067 BFD_ASSERT (eh
->dynindx
!= -1);
3069 splt
= htab
->etab
.splt
;
3070 sgot
= htab
->etab
.sgotplt
;
3071 srela
= htab
->etab
.srelplt
;
3072 BFD_ASSERT (splt
!= NULL
&& sgot
!= NULL
&& srela
!= NULL
);
3074 /* Get the index in the procedure linkage table which
3075 corresponds to this symbol. This is the index of this symbol
3076 in all the symbols for which we are making plt entries. The
3077 first entry in the procedure linkage table is reserved. */
3078 plt_index
= eh
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3080 /* Get the offset into the .got.plt table of the entry that
3081 corresponds to this function. */
3082 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3084 BFD_ASSERT (got_offset
< (1 << 16));
3086 got_entry
= sgot
->output_section
->vma
3087 + sgot
->output_offset
3090 BFD_ASSERT (plt_index
< (1 << 16));
3092 /* Fill in the entry in the procedure linkage table. */
3093 if (! bfd_link_pic (info
))
3095 bfd_put_32 (output_bfd
,
3097 | (((got_entry
>> 16) & 0xffff) << 3)),
3098 splt
->contents
+ eh
->plt
.offset
);
3099 bfd_put_32 (output_bfd
,
3101 | ((got_entry
& 0xffff) << 3)),
3102 splt
->contents
+ eh
->plt
.offset
+ 4);
3103 bfd_put_32 (output_bfd
, plt_entry
[2],
3104 splt
->contents
+ eh
->plt
.offset
+ 8);
3105 bfd_put_32 (output_bfd
,
3106 (plt_entry
[3] | (plt_index
<< 3)),
3107 splt
->contents
+ eh
->plt
.offset
+ 12);
3108 bfd_put_32 (output_bfd
,
3110 | ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3111 splt
->contents
+ eh
->plt
.offset
+ 16);
3115 bfd_vma addr
= got_entry
- (splt
->output_section
->vma
+
3116 splt
->output_offset
+ eh
->plt
.offset
);
3118 bfd_put_32 (output_bfd
,
3119 plt_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3120 splt
->contents
+ eh
->plt
.offset
);
3121 bfd_put_32 (output_bfd
,
3122 plt_pic_entry
[1] | ((addr
& 0xffff) << 3),
3123 splt
->contents
+ eh
->plt
.offset
+ 4);
3124 bfd_put_32 (output_bfd
, plt_pic_entry
[2],
3125 splt
->contents
+ eh
->plt
.offset
+ 8);
3126 bfd_put_32 (output_bfd
,
3127 (plt_pic_entry
[3] | (plt_index
<< 3)),
3128 splt
->contents
+ eh
->plt
.offset
+ 12);
3129 bfd_put_32 (output_bfd
,
3131 + ((((unsigned int) ((- (eh
->plt
.offset
+ 16)) >> 2)) & 0x7ffff) << 5)),
3132 splt
->contents
+ eh
->plt
.offset
+ 16);
3135 /* Fill in the entry in the global offset table. */
3136 bfd_put_32 (output_bfd
,
3137 (splt
->output_section
->vma
3138 + splt
->output_offset
3140 + 12), /* offset within PLT entry */
3141 sgot
->contents
+ got_offset
);
3143 /* Fill in the entry in the .rela.plt section. */
3144 rel
.r_offset
= (sgot
->output_section
->vma
3145 + sgot
->output_offset
3147 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_JMP_SLOT
);
3149 loc
= htab
->etab
.srelplt
->contents
;
3150 loc
+= plt_index
* sizeof(Elf32_External_Rela
);
3151 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3153 if (!eh
->def_regular
)
3155 /* Mark the symbol as undefined, rather than as defined in
3156 the .plt section. Leave the value alone. */
3157 sym
->st_shndx
= SHN_UNDEF
;
3161 if (eh
->got
.offset
!= (bfd_vma
) -1
3162 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_GD
) == 0
3163 && (metag_elf_hash_entry (eh
)->tls_type
& GOT_TLS_IE
) == 0)
3165 /* This symbol has an entry in the global offset table. Set it
3168 rel
.r_offset
= ((eh
->got
.offset
&~ (bfd_vma
) 1)
3169 + htab
->etab
.sgot
->output_offset
3170 + htab
->etab
.sgot
->output_section
->vma
);
3172 /* If this is a -Bsymbolic link and the symbol is defined
3173 locally or was forced to be local because of a version file,
3174 we just want to emit a RELATIVE reloc. The entry in the
3175 global offset table will already have been initialized in the
3176 relocate_section function. */
3177 if (bfd_link_pic (info
)
3178 && (info
->symbolic
|| eh
->dynindx
== -1)
3181 rel
.r_info
= ELF32_R_INFO (0, R_METAG_RELATIVE
);
3182 rel
.r_addend
= (eh
->root
.u
.def
.value
3183 + eh
->root
.u
.def
.section
->output_offset
3184 + eh
->root
.u
.def
.section
->output_section
->vma
);
3188 if ((eh
->got
.offset
& 1) != 0)
3190 bfd_put_32 (output_bfd
, 0, htab
->etab
.sgot
->contents
+ eh
->got
.offset
);
3191 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_GLOB_DAT
);
3195 loc
= htab
->etab
.srelgot
->contents
;
3196 loc
+= htab
->etab
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3197 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3204 /* This symbol needs a copy reloc. Set it up. */
3206 if (! (eh
->dynindx
!= -1
3207 && (eh
->root
.type
== bfd_link_hash_defined
3208 || eh
->root
.type
== bfd_link_hash_defweak
)))
3211 rel
.r_offset
= (eh
->root
.u
.def
.value
3212 + eh
->root
.u
.def
.section
->output_offset
3213 + eh
->root
.u
.def
.section
->output_section
->vma
);
3215 rel
.r_info
= ELF32_R_INFO (eh
->dynindx
, R_METAG_COPY
);
3216 if (eh
->root
.u
.def
.section
== htab
->etab
.sdynrelro
)
3217 s
= htab
->etab
.sreldynrelro
;
3219 s
= htab
->etab
.srelbss
;
3220 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3221 bfd_elf32_swap_reloca_out (output_bfd
, &rel
, loc
);
3224 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3225 if (eh
->root
.root
.string
[0] == '_'
3226 && (strcmp (eh
->root
.root
.string
, "_DYNAMIC") == 0
3227 || eh
== htab
->etab
.hgot
))
3229 sym
->st_shndx
= SHN_ABS
;
3235 /* Set the Meta ELF ABI version. */
3238 elf_metag_post_process_headers (bfd
* abfd
, struct bfd_link_info
* link_info
)
3240 Elf_Internal_Ehdr
* i_ehdrp
; /* ELF file header, internal form. */
3242 _bfd_elf_post_process_headers (abfd
, link_info
);
3243 i_ehdrp
= elf_elfheader (abfd
);
3244 i_ehdrp
->e_ident
[EI_ABIVERSION
] = METAG_ELF_ABI_VERSION
;
3247 /* Used to decide how to sort relocs in an optimal manner for the
3248 dynamic linker, before writing them out. */
3250 static enum elf_reloc_type_class
3251 elf_metag_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3252 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3253 const Elf_Internal_Rela
*rela
)
3255 switch ((int) ELF32_R_TYPE (rela
->r_info
))
3257 case R_METAG_RELATIVE
:
3258 return reloc_class_relative
;
3259 case R_METAG_JMP_SLOT
:
3260 return reloc_class_plt
;
3262 return reloc_class_copy
;
3264 return reloc_class_normal
;
3268 /* Finish up the dynamic sections. */
3271 elf_metag_finish_dynamic_sections (bfd
*output_bfd
,
3272 struct bfd_link_info
*info
)
3275 struct elf_metag_link_hash_table
*htab
;
3278 htab
= metag_link_hash_table (info
);
3279 dynobj
= htab
->etab
.dynobj
;
3281 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3283 if (htab
->etab
.dynamic_sections_created
)
3286 Elf32_External_Dyn
*dyncon
, *dynconend
;
3291 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3292 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3293 for (; dyncon
< dynconend
; dyncon
++)
3295 Elf_Internal_Dyn dyn
;
3298 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3306 s
= htab
->etab
.sgot
;
3307 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3308 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3312 s
= htab
->etab
.srelplt
;
3313 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3314 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3318 s
= htab
->etab
.srelplt
;
3319 dyn
.d_un
.d_val
= s
->size
;
3320 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3326 /* Fill in the first entry in the procedure linkage table. */
3327 splt
= htab
->etab
.splt
;
3328 if (splt
&& splt
->size
> 0)
3331 /* addr = .got + 4 */
3332 addr
= (htab
->etab
.sgot
->output_section
->vma
3333 + htab
->etab
.sgot
->output_offset
+ 4);
3334 if (bfd_link_pic (info
))
3336 addr
-= splt
->output_section
->vma
+ splt
->output_offset
;
3337 bfd_put_32 (output_bfd
,
3338 plt0_pic_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3340 bfd_put_32 (output_bfd
,
3341 plt0_pic_entry
[1] | ((addr
& 0xffff) << 3),
3342 splt
->contents
+ 4);
3343 bfd_put_32 (output_bfd
, plt0_pic_entry
[2], splt
->contents
+ 8);
3344 bfd_put_32 (output_bfd
, plt0_pic_entry
[3], splt
->contents
+ 12);
3345 bfd_put_32 (output_bfd
, plt0_pic_entry
[4], splt
->contents
+ 16);
3349 bfd_put_32 (output_bfd
,
3350 plt0_entry
[0] | (((addr
>> 16) & 0xffff) << 3),
3352 bfd_put_32 (output_bfd
,
3353 plt0_entry
[1] | ((addr
& 0xffff) << 3),
3354 splt
->contents
+ 4);
3355 bfd_put_32 (output_bfd
, plt0_entry
[2], splt
->contents
+ 8);
3356 bfd_put_32 (output_bfd
, plt0_entry
[3], splt
->contents
+ 12);
3357 bfd_put_32 (output_bfd
, plt0_entry
[4], splt
->contents
+ 16);
3360 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
=
3365 if (htab
->etab
.sgot
!= NULL
&& htab
->etab
.sgot
->size
!= 0)
3367 /* Fill in the first entry in the global offset table.
3368 We use it to point to our dynamic section, if we have one. */
3369 bfd_put_32 (output_bfd
,
3370 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0,
3371 htab
->etab
.sgot
->contents
);
3373 /* The second entry is reserved for use by the dynamic linker. */
3374 memset (htab
->etab
.sgot
->contents
+ GOT_ENTRY_SIZE
, 0, GOT_ENTRY_SIZE
);
3376 /* Set .got entry size. */
3377 elf_section_data (htab
->etab
.sgot
->output_section
)
3378 ->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3384 /* Return the section that should be marked against GC for a given
3388 elf_metag_gc_mark_hook (asection
*sec
,
3389 struct bfd_link_info
*info
,
3390 Elf_Internal_Rela
*rela
,
3391 struct elf_link_hash_entry
*hh
,
3392 Elf_Internal_Sym
*sym
)
3395 switch ((unsigned int) ELF32_R_TYPE (rela
->r_info
))
3397 case R_METAG_GNU_VTINHERIT
:
3398 case R_METAG_GNU_VTENTRY
:
3402 return _bfd_elf_gc_mark_hook (sec
, info
, rela
, hh
, sym
);
3405 /* Determine the type of stub needed, if any, for a call. */
3407 static enum elf_metag_stub_type
3408 metag_type_of_stub (asection
*input_sec
,
3409 const Elf_Internal_Rela
*rel
,
3410 struct elf_metag_link_hash_entry
*hh
,
3411 bfd_vma destination
,
3412 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3415 bfd_vma branch_offset
;
3416 bfd_vma max_branch_offset
;
3419 !(hh
->eh
.root
.type
== bfd_link_hash_defined
3420 || hh
->eh
.root
.type
== bfd_link_hash_defweak
))
3421 return metag_stub_none
;
3423 /* Determine where the call point is. */
3424 location
= (input_sec
->output_offset
3425 + input_sec
->output_section
->vma
3428 branch_offset
= destination
- location
;
3430 /* Determine if a long branch stub is needed. Meta branch offsets
3431 are signed 19 bits 4 byte aligned. */
3432 max_branch_offset
= (1 << (BRANCH_BITS
-1)) << 2;
3434 if (branch_offset
+ max_branch_offset
>= 2*max_branch_offset
)
3436 if (bfd_link_pic (info
))
3437 return metag_stub_long_branch_shared
;
3439 return metag_stub_long_branch
;
3442 return metag_stub_none
;
3445 #define MOVT_A0_3 0x82180005
3446 #define JUMP_A0_3 0xac180003
3448 #define MOVT_A1LBP 0x83080005
3449 #define ADD_A1LBP 0x83080000
3451 #define ADDT_A0_3_CPC 0x82980001
3452 #define ADD_A0_3_A0_3 0x82180000
3453 #define MOV_PC_A0_3 0xa3180ca0
3456 metag_build_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3458 struct elf_metag_stub_hash_entry
*hsh
;
3465 /* Massage our args to the form they really have. */
3466 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3468 stub_sec
= hsh
->stub_sec
;
3470 /* Make a note of the offset within the stubs for this entry. */
3471 hsh
->stub_offset
= stub_sec
->size
;
3472 loc
= stub_sec
->contents
+ hsh
->stub_offset
;
3474 stub_bfd
= stub_sec
->owner
;
3476 switch (hsh
->stub_type
)
3478 case metag_stub_long_branch_shared
:
3479 /* A PIC long branch stub is an ADDT and an ADD instruction used to
3480 calculate the jump target using A0.3 as a temporary. Then a MOV
3481 to PC carries out the jump. */
3482 sym_value
= (hsh
->target_value
3483 + hsh
->target_section
->output_offset
3484 + hsh
->target_section
->output_section
->vma
3487 sym_value
-= (hsh
->stub_offset
3488 + stub_sec
->output_offset
3489 + stub_sec
->output_section
->vma
);
3491 bfd_put_32 (stub_bfd
, ADDT_A0_3_CPC
| (((sym_value
>> 16) & 0xffff) << 3),
3494 bfd_put_32 (stub_bfd
, ADD_A0_3_A0_3
| ((sym_value
& 0xffff) << 3),
3497 bfd_put_32 (stub_bfd
, MOV_PC_A0_3
, loc
+ 8);
3501 case metag_stub_long_branch
:
3502 /* A standard long branch stub is a MOVT instruction followed by a
3503 JUMP instruction using the A0.3 register as a temporary. This is
3504 the same method used by the LDLK linker (patch.c). */
3505 sym_value
= (hsh
->target_value
3506 + hsh
->target_section
->output_offset
3507 + hsh
->target_section
->output_section
->vma
3510 bfd_put_32 (stub_bfd
, MOVT_A0_3
| (((sym_value
>> 16) & 0xffff) << 3),
3513 bfd_put_32 (stub_bfd
, JUMP_A0_3
| ((sym_value
& 0xffff) << 3), loc
+ 4);
3522 stub_sec
->size
+= size
;
3526 /* As above, but don't actually build the stub. Just bump offset so
3527 we know stub section sizes. */
3530 metag_size_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg ATTRIBUTE_UNUSED
)
3532 struct elf_metag_stub_hash_entry
*hsh
;
3535 /* Massage our args to the form they really have. */
3536 hsh
= (struct elf_metag_stub_hash_entry
*) gen_entry
;
3538 if (hsh
->stub_type
== metag_stub_long_branch
)
3540 else if (hsh
->stub_type
== metag_stub_long_branch_shared
)
3543 hsh
->stub_sec
->size
+= size
;
3547 /* Set up various things so that we can make a list of input sections
3548 for each output section included in the link. Returns -1 on error,
3549 0 when no stubs will be needed, and 1 on success. */
3552 elf_metag_setup_section_lists (bfd
*output_bfd
, struct bfd_link_info
*info
)
3555 unsigned int bfd_count
;
3556 unsigned int top_id
, top_index
;
3558 asection
**input_list
, **list
;
3560 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3562 /* Count the number of input BFDs and find the top input section id. */
3563 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3565 input_bfd
= input_bfd
->link
.next
)
3568 for (section
= input_bfd
->sections
;
3570 section
= section
->next
)
3572 if (top_id
< section
->id
)
3573 top_id
= section
->id
;
3577 htab
->bfd_count
= bfd_count
;
3579 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3580 htab
->stub_group
= bfd_zmalloc (amt
);
3581 if (htab
->stub_group
== NULL
)
3584 /* We can't use output_bfd->section_count here to find the top output
3585 section index as some sections may have been removed, and
3586 strip_excluded_output_sections doesn't renumber the indices. */
3587 for (section
= output_bfd
->sections
, top_index
= 0;
3589 section
= section
->next
)
3591 if (top_index
< section
->index
)
3592 top_index
= section
->index
;
3595 htab
->top_index
= top_index
;
3596 amt
= sizeof (asection
*) * (top_index
+ 1);
3597 input_list
= bfd_malloc (amt
);
3598 htab
->input_list
= input_list
;
3599 if (input_list
== NULL
)
3602 /* For sections we aren't interested in, mark their entries with a
3603 value we can check later. */
3604 list
= input_list
+ top_index
;
3606 *list
= bfd_abs_section_ptr
;
3607 while (list
-- != input_list
);
3609 for (section
= output_bfd
->sections
;
3611 section
= section
->next
)
3613 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
3614 * have PC relative relocs in them but no code flag set. */
3615 if (((section
->flags
& SEC_CODE
) != 0) ||
3616 strcmp(".ctors", section
->name
) ||
3617 strcmp(".dtors", section
->name
))
3618 input_list
[section
->index
] = NULL
;
3624 /* The linker repeatedly calls this function for each input section,
3625 in the order that input sections are linked into output sections.
3626 Build lists of input sections to determine groupings between which
3627 we may insert linker stubs. */
3630 elf_metag_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3632 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3634 if (isec
->output_section
->index
<= htab
->top_index
)
3636 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3637 if (*list
!= bfd_abs_section_ptr
)
3639 /* Steal the link_sec pointer for our list. */
3640 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3641 /* This happens to make the list in reverse order,
3642 which is what we want. */
3643 PREV_SEC (isec
) = *list
;
3649 /* See whether we can group stub sections together. Grouping stub
3650 sections may result in fewer stubs. More importantly, we need to
3651 put all .init* and .fini* stubs at the beginning of the .init or
3652 .fini output sections respectively, because glibc splits the
3653 _init and _fini functions into multiple parts. Putting a stub in
3654 the middle of a function is not a good idea. */
3657 group_sections (struct elf_metag_link_hash_table
*htab
,
3658 bfd_size_type stub_group_size
,
3659 bfd_boolean stubs_always_before_branch
)
3661 asection
**list
= htab
->input_list
+ htab
->top_index
;
3664 asection
*tail
= *list
;
3665 if (tail
== bfd_abs_section_ptr
)
3667 while (tail
!= NULL
)
3671 bfd_size_type total
;
3672 bfd_boolean big_sec
;
3676 big_sec
= total
>= stub_group_size
;
3678 while ((prev
= PREV_SEC (curr
)) != NULL
3679 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3683 /* OK, the size from the start of CURR to the end is less
3684 than stub_group_size bytes and thus can be handled by one stub
3685 section. (or the tail section is itself larger than
3686 stub_group_size bytes, in which case we may be toast.)
3687 We should really be keeping track of the total size of
3688 stubs added here, as stubs contribute to the final output
3692 prev
= PREV_SEC (tail
);
3693 /* Set up this stub group. */
3694 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3696 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3698 /* But wait, there's more! Input sections up to stub_group_size
3699 bytes before the stub section can be handled by it too.
3700 Don't do this if we have a really large section after the
3701 stubs, as adding more stubs increases the chance that
3702 branches may not reach into the stub section. */
3703 if (!stubs_always_before_branch
&& !big_sec
)
3707 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3711 prev
= PREV_SEC (tail
);
3712 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3718 while (list
-- != htab
->input_list
);
3719 free (htab
->input_list
);
3723 /* Read in all local syms for all input bfds.
3724 Returns -1 on error, 0 otherwise. */
3727 get_local_syms (bfd
*output_bfd ATTRIBUTE_UNUSED
, bfd
*input_bfd
,
3728 struct bfd_link_info
*info
)
3730 unsigned int bfd_indx
;
3731 Elf_Internal_Sym
*local_syms
, **all_local_syms
;
3732 int stub_changed
= 0;
3733 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3735 /* We want to read in symbol extension records only once. To do this
3736 we need to read in the local symbols in parallel and save them for
3737 later use; so hold pointers to the local symbols in an array. */
3738 bfd_size_type amt
= sizeof (Elf_Internal_Sym
*) * htab
->bfd_count
;
3739 all_local_syms
= bfd_zmalloc (amt
);
3740 htab
->all_local_syms
= all_local_syms
;
3741 if (all_local_syms
== NULL
)
3744 /* Walk over all the input BFDs, swapping in local symbols. */
3747 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3749 Elf_Internal_Shdr
*symtab_hdr
;
3751 /* We'll need the symbol table in a second. */
3752 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3753 if (symtab_hdr
->sh_info
== 0)
3756 /* We need an array of the local symbols attached to the input bfd. */
3757 local_syms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
3758 if (local_syms
== NULL
)
3760 local_syms
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
3761 symtab_hdr
->sh_info
, 0,
3763 /* Cache them for elf_link_input_bfd. */
3764 symtab_hdr
->contents
= (unsigned char *) local_syms
;
3766 if (local_syms
== NULL
)
3769 all_local_syms
[bfd_indx
] = local_syms
;
3772 return stub_changed
;
3775 /* Determine and set the size of the stub section for a final link.
3777 The basic idea here is to examine all the relocations looking for
3778 PC-relative calls to a target that is unreachable with a "CALLR"
3781 /* See elf32-hppa.c and elf64-ppc.c. */
3784 elf_metag_size_stubs(bfd
*output_bfd
, bfd
*stub_bfd
,
3785 struct bfd_link_info
*info
,
3786 bfd_signed_vma group_size
,
3787 asection
* (*add_stub_section
) (const char *, asection
*),
3788 void (*layout_sections_again
) (void))
3790 bfd_size_type stub_group_size
;
3791 bfd_boolean stubs_always_before_branch
;
3792 bfd_boolean stub_changed
;
3793 struct elf_metag_link_hash_table
*htab
= metag_link_hash_table (info
);
3795 /* Stash our params away. */
3796 htab
->stub_bfd
= stub_bfd
;
3797 htab
->add_stub_section
= add_stub_section
;
3798 htab
->layout_sections_again
= layout_sections_again
;
3799 stubs_always_before_branch
= group_size
< 0;
3801 stub_group_size
= -group_size
;
3803 stub_group_size
= group_size
;
3804 if (stub_group_size
== 1)
3806 /* Default values. */
3807 /* FIXME: not sure what these values should be */
3808 if (stubs_always_before_branch
)
3810 stub_group_size
= (1 << BRANCH_BITS
);
3814 stub_group_size
= (1 << BRANCH_BITS
);
3818 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
3820 switch (get_local_syms (output_bfd
, info
->input_bfds
, info
))
3823 if (htab
->all_local_syms
)
3824 goto error_ret_free_local
;
3828 stub_changed
= FALSE
;
3832 stub_changed
= TRUE
;
3839 unsigned int bfd_indx
;
3842 for (input_bfd
= info
->input_bfds
, bfd_indx
= 0;
3844 input_bfd
= input_bfd
->link
.next
, bfd_indx
++)
3846 Elf_Internal_Shdr
*symtab_hdr
;
3848 Elf_Internal_Sym
*local_syms
;
3850 /* We'll need the symbol table in a second. */
3851 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
3852 if (symtab_hdr
->sh_info
== 0)
3855 local_syms
= htab
->all_local_syms
[bfd_indx
];
3857 /* Walk over each section attached to the input bfd. */
3858 for (section
= input_bfd
->sections
;
3860 section
= section
->next
)
3862 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
3864 /* If there aren't any relocs, then there's nothing more
3866 if ((section
->flags
& SEC_RELOC
) == 0
3867 || section
->reloc_count
== 0)
3870 /* If this section is a link-once section that will be
3871 discarded, then don't create any stubs. */
3872 if (section
->output_section
== NULL
3873 || section
->output_section
->owner
!= output_bfd
)
3876 /* Get the relocs. */
3878 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
, NULL
,
3880 if (internal_relocs
== NULL
)
3881 goto error_ret_free_local
;
3883 /* Now examine each relocation. */
3884 irela
= internal_relocs
;
3885 irelaend
= irela
+ section
->reloc_count
;
3886 for (; irela
< irelaend
; irela
++)
3888 unsigned int r_type
, r_indx
;
3889 enum elf_metag_stub_type stub_type
;
3890 struct elf_metag_stub_hash_entry
*hsh
;
3893 bfd_vma destination
;
3894 struct elf_metag_link_hash_entry
*hh
;
3896 const asection
*id_sec
;
3898 r_type
= ELF32_R_TYPE (irela
->r_info
);
3899 r_indx
= ELF32_R_SYM (irela
->r_info
);
3901 if (r_type
>= (unsigned int) R_METAG_MAX
)
3903 bfd_set_error (bfd_error_bad_value
);
3904 error_ret_free_internal
:
3905 if (elf_section_data (section
)->relocs
== NULL
)
3906 free (internal_relocs
);
3907 goto error_ret_free_local
;
3910 /* Only look for stubs on CALLR and B instructions. */
3911 if (!(r_type
== (unsigned int) R_METAG_RELBRANCH
||
3912 r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
))
3915 /* Now determine the call target, its name, value,
3921 if (r_indx
< symtab_hdr
->sh_info
)
3923 /* It's a local symbol. */
3924 Elf_Internal_Sym
*sym
;
3925 Elf_Internal_Shdr
*hdr
;
3928 sym
= local_syms
+ r_indx
;
3929 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
3930 sym_value
= sym
->st_value
;
3931 shndx
= sym
->st_shndx
;
3932 if (shndx
< elf_numsections (input_bfd
))
3934 hdr
= elf_elfsections (input_bfd
)[shndx
];
3935 sym_sec
= hdr
->bfd_section
;
3936 destination
= (sym_value
+ irela
->r_addend
3937 + sym_sec
->output_offset
3938 + sym_sec
->output_section
->vma
);
3943 /* It's an external symbol. */
3946 e_indx
= r_indx
- symtab_hdr
->sh_info
;
3947 hh
= ((struct elf_metag_link_hash_entry
*)
3948 elf_sym_hashes (input_bfd
)[e_indx
]);
3950 while (hh
->eh
.root
.type
== bfd_link_hash_indirect
3951 || hh
->eh
.root
.type
== bfd_link_hash_warning
)
3952 hh
= ((struct elf_metag_link_hash_entry
*)
3953 hh
->eh
.root
.u
.i
.link
);
3955 if (hh
->eh
.root
.type
== bfd_link_hash_defined
3956 || hh
->eh
.root
.type
== bfd_link_hash_defweak
)
3958 sym_sec
= hh
->eh
.root
.u
.def
.section
;
3959 sym_value
= hh
->eh
.root
.u
.def
.value
;
3960 if (hh
->eh
.plt
.offset
!= (bfd_vma
) -1
3961 && hh
->eh
.dynindx
!= -1
3962 && r_type
== (unsigned int) R_METAG_RELBRANCH_PLT
)
3964 sym_sec
= htab
->etab
.splt
;
3965 sym_value
= hh
->eh
.plt
.offset
;
3968 if (sym_sec
->output_section
!= NULL
)
3969 destination
= (sym_value
+ irela
->r_addend
3970 + sym_sec
->output_offset
3971 + sym_sec
->output_section
->vma
);
3975 else if (hh
->eh
.root
.type
== bfd_link_hash_undefweak
)
3977 if (! bfd_link_pic (info
))
3980 else if (hh
->eh
.root
.type
== bfd_link_hash_undefined
)
3982 if (! (info
->unresolved_syms_in_objects
== RM_IGNORE
3983 && (ELF_ST_VISIBILITY (hh
->eh
.other
)
3989 bfd_set_error (bfd_error_bad_value
);
3990 goto error_ret_free_internal
;
3994 /* Determine what (if any) linker stub is needed. */
3995 stub_type
= metag_type_of_stub (section
, irela
, hh
,
3997 if (stub_type
== metag_stub_none
)
4000 /* Support for grouping stub sections. */
4001 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4003 /* Get the name of this stub. */
4004 stub_name
= metag_stub_name (id_sec
, sym_sec
, hh
, irela
);
4006 goto error_ret_free_internal
;
4008 hsh
= metag_stub_hash_lookup (&htab
->bstab
,
4013 /* The proper stub has already been created. */
4018 hsh
= metag_add_stub (stub_name
, section
, htab
);
4022 goto error_ret_free_internal
;
4024 hsh
->target_value
= sym_value
;
4025 hsh
->target_section
= sym_sec
;
4026 hsh
->stub_type
= stub_type
;
4028 hsh
->addend
= irela
->r_addend
;
4029 stub_changed
= TRUE
;
4032 /* We're done with the internal relocs, free them. */
4033 if (elf_section_data (section
)->relocs
== NULL
)
4034 free (internal_relocs
);
4041 /* OK, we've added some stubs. Find out the new size of the
4043 for (stub_sec
= htab
->stub_bfd
->sections
;
4045 stub_sec
= stub_sec
->next
)
4048 bfd_hash_traverse (&htab
->bstab
, metag_size_one_stub
, htab
);
4050 /* Ask the linker to do its stuff. */
4051 (*htab
->layout_sections_again
) ();
4052 stub_changed
= FALSE
;
4055 free (htab
->all_local_syms
);
4058 error_ret_free_local
:
4059 free (htab
->all_local_syms
);
4063 /* Build all the stubs associated with the current output file. The
4064 stubs are kept in a hash table attached to the main linker hash
4065 table. This function is called via metagelf_finish in the linker. */
4068 elf_metag_build_stubs (struct bfd_link_info
*info
)
4071 struct bfd_hash_table
*table
;
4072 struct elf_metag_link_hash_table
*htab
;
4074 htab
= metag_link_hash_table (info
);
4076 for (stub_sec
= htab
->stub_bfd
->sections
;
4078 stub_sec
= stub_sec
->next
)
4082 /* Allocate memory to hold the linker stubs. */
4083 size
= stub_sec
->size
;
4084 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4085 if (stub_sec
->contents
== NULL
&& size
!= 0)
4090 /* Build the stubs as directed by the stub hash table. */
4091 table
= &htab
->bstab
;
4092 bfd_hash_traverse (table
, metag_build_one_stub
, info
);
4097 /* Return TRUE if SYM represents a local label symbol. */
4100 elf_metag_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
, const char *name
)
4102 if (name
[0] == '$' && name
[1] == 'L')
4104 return _bfd_elf_is_local_label_name (abfd
, name
);
4107 /* Return address for Ith PLT stub in section PLT, for relocation REL
4108 or (bfd_vma) -1 if it should not be included. */
4111 elf_metag_plt_sym_val (bfd_vma i
, const asection
*plt
,
4112 const arelent
*rel ATTRIBUTE_UNUSED
)
4114 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4117 #define ELF_ARCH bfd_arch_metag
4118 #define ELF_TARGET_ID METAG_ELF_DATA
4119 #define ELF_MACHINE_CODE EM_METAG
4120 #define ELF_MINPAGESIZE 0x1000
4121 #define ELF_MAXPAGESIZE 0x4000
4122 #define ELF_COMMONPAGESIZE 0x1000
4124 #define TARGET_LITTLE_SYM metag_elf32_vec
4125 #define TARGET_LITTLE_NAME "elf32-metag"
4127 #define elf_symbol_leading_char '_'
4129 #define elf_info_to_howto_rel NULL
4130 #define elf_info_to_howto metag_info_to_howto_rela
4132 #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name
4133 #define bfd_elf32_bfd_link_hash_table_create \
4134 elf_metag_link_hash_table_create
4135 #define elf_backend_relocate_section elf_metag_relocate_section
4136 #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook
4137 #define elf_backend_check_relocs elf_metag_check_relocs
4138 #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections
4139 #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol
4140 #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol
4141 #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections
4142 #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections
4143 #define elf_backend_omit_section_dynsym \
4144 _bfd_elf_omit_section_dynsym_all
4145 #define elf_backend_post_process_headers elf_metag_post_process_headers
4146 #define elf_backend_reloc_type_class elf_metag_reloc_type_class
4147 #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol
4148 #define elf_backend_plt_sym_val elf_metag_plt_sym_val
4150 #define elf_backend_can_gc_sections 1
4151 #define elf_backend_can_refcount 1
4152 #define elf_backend_rela_normal 1
4153 #define elf_backend_want_got_plt 1
4154 #define elf_backend_want_got_sym 0
4155 #define elf_backend_want_plt_sym 0
4156 #define elf_backend_plt_readonly 1
4157 #define elf_backend_dtrel_excludes_plt 1
4158 #define elf_backend_want_dynrelro 1
4160 #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup
4161 #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup
4163 #include "elf32-target.h"