1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
3 Copyright (C) 2009-2015 Free Software Foundation, Inc.
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
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
30 #include "elf/microblaze.h"
33 #define USE_RELA /* Only USE_REL is actually significant, but this is
34 here are a reminder... */
35 #define INST_WORD_SIZE 4
37 static int ro_small_data_pointer = 0;
38 static int rw_small_data_pointer = 0;
40 static reloc_howto_type * microblaze_elf_howto_table [(int) R_MICROBLAZE_max];
42 static reloc_howto_type microblaze_elf_howto_raw[] =
44 /* This reloc does nothing. */
45 HOWTO (R_MICROBLAZE_NONE, /* Type. */
47 2, /* Size (0 = byte, 1 = short, 2 = long). */
49 FALSE, /* PC_relative. */
51 complain_overflow_bitfield, /* Complain on overflow. */
52 NULL, /* Special Function. */
53 "R_MICROBLAZE_NONE", /* Name. */
54 FALSE, /* Partial Inplace. */
57 FALSE), /* PC relative offset? */
59 /* A standard 32 bit relocation. */
60 HOWTO (R_MICROBLAZE_32, /* Type. */
62 2, /* Size (0 = byte, 1 = short, 2 = long). */
64 FALSE, /* PC_relative. */
66 complain_overflow_bitfield, /* Complain on overflow. */
67 bfd_elf_generic_reloc,/* Special Function. */
68 "R_MICROBLAZE_32", /* Name. */
69 FALSE, /* Partial Inplace. */
71 0xffffffff, /* Dest Mask. */
72 FALSE), /* PC relative offset? */
74 /* A standard PCREL 32 bit relocation. */
75 HOWTO (R_MICROBLAZE_32_PCREL,/* Type. */
77 2, /* Size (0 = byte, 1 = short, 2 = long). */
79 TRUE, /* PC_relative. */
81 complain_overflow_bitfield, /* Complain on overflow. */
82 bfd_elf_generic_reloc,/* Special Function. */
83 "R_MICROBLAZE_32_PCREL", /* Name. */
84 TRUE, /* Partial Inplace. */
86 0xffffffff, /* Dest Mask. */
87 TRUE), /* PC relative offset? */
89 /* A 64 bit PCREL relocation. Table-entry not really used. */
90 HOWTO (R_MICROBLAZE_64_PCREL,/* Type. */
92 2, /* Size (0 = byte, 1 = short, 2 = long). */
94 TRUE, /* PC_relative. */
96 complain_overflow_dont, /* Complain on overflow. */
97 bfd_elf_generic_reloc,/* Special Function. */
98 "R_MICROBLAZE_64_PCREL", /* Name. */
99 FALSE, /* Partial Inplace. */
100 0, /* Source Mask. */
101 0x0000ffff, /* Dest Mask. */
102 TRUE), /* PC relative offset? */
104 /* The low half of a PCREL 32 bit relocation. */
105 HOWTO (R_MICROBLAZE_32_PCREL_LO, /* Type. */
107 2, /* Size (0 = byte, 1 = short, 2 = long). */
109 TRUE, /* PC_relative. */
111 complain_overflow_signed, /* Complain on overflow. */
112 bfd_elf_generic_reloc, /* Special Function. */
113 "R_MICROBLAZE_32_PCREL_LO", /* Name. */
114 FALSE, /* Partial Inplace. */
115 0, /* Source Mask. */
116 0x0000ffff, /* Dest Mask. */
117 TRUE), /* PC relative offset? */
119 /* A 64 bit relocation. Table entry not really used. */
120 HOWTO (R_MICROBLAZE_64, /* Type. */
122 2, /* Size (0 = byte, 1 = short, 2 = long). */
124 FALSE, /* PC_relative. */
126 complain_overflow_dont, /* Complain on overflow. */
127 bfd_elf_generic_reloc,/* Special Function. */
128 "R_MICROBLAZE_64", /* Name. */
129 FALSE, /* Partial Inplace. */
130 0, /* Source Mask. */
131 0x0000ffff, /* Dest Mask. */
132 FALSE), /* PC relative offset? */
134 /* The low half of a 32 bit relocation. */
135 HOWTO (R_MICROBLAZE_32_LO, /* Type. */
137 2, /* Size (0 = byte, 1 = short, 2 = long). */
139 FALSE, /* PC_relative. */
141 complain_overflow_signed, /* Complain on overflow. */
142 bfd_elf_generic_reloc,/* Special Function. */
143 "R_MICROBLAZE_32_LO", /* Name. */
144 FALSE, /* Partial Inplace. */
145 0, /* Source Mask. */
146 0x0000ffff, /* Dest Mask. */
147 FALSE), /* PC relative offset? */
149 /* Read-only small data section relocation. */
150 HOWTO (R_MICROBLAZE_SRO32, /* Type. */
152 2, /* Size (0 = byte, 1 = short, 2 = long). */
154 FALSE, /* PC_relative. */
156 complain_overflow_bitfield, /* Complain on overflow. */
157 bfd_elf_generic_reloc,/* Special Function. */
158 "R_MICROBLAZE_SRO32", /* Name. */
159 FALSE, /* Partial Inplace. */
160 0, /* Source Mask. */
161 0x0000ffff, /* Dest Mask. */
162 FALSE), /* PC relative offset? */
164 /* Read-write small data area relocation. */
165 HOWTO (R_MICROBLAZE_SRW32, /* Type. */
167 2, /* Size (0 = byte, 1 = short, 2 = long). */
169 FALSE, /* PC_relative. */
171 complain_overflow_bitfield, /* Complain on overflow. */
172 bfd_elf_generic_reloc,/* Special Function. */
173 "R_MICROBLAZE_SRW32", /* Name. */
174 FALSE, /* Partial Inplace. */
175 0, /* Source Mask. */
176 0x0000ffff, /* Dest Mask. */
177 FALSE), /* PC relative offset? */
179 /* This reloc does nothing. Used for relaxation. */
180 HOWTO (R_MICROBLAZE_64_NONE, /* Type. */
182 2, /* Size (0 = byte, 1 = short, 2 = long). */
184 TRUE, /* PC_relative. */
186 complain_overflow_bitfield, /* Complain on overflow. */
187 NULL, /* Special Function. */
188 "R_MICROBLAZE_64_NONE",/* Name. */
189 FALSE, /* Partial Inplace. */
190 0, /* Source Mask. */
192 FALSE), /* PC relative offset? */
194 /* Symbol Op Symbol relocation. */
195 HOWTO (R_MICROBLAZE_32_SYM_OP_SYM, /* Type. */
197 2, /* Size (0 = byte, 1 = short, 2 = long). */
199 FALSE, /* PC_relative. */
201 complain_overflow_bitfield, /* Complain on overflow. */
202 bfd_elf_generic_reloc,/* Special Function. */
203 "R_MICROBLAZE_32_SYM_OP_SYM", /* Name. */
204 FALSE, /* Partial Inplace. */
205 0, /* Source Mask. */
206 0xffffffff, /* Dest Mask. */
207 FALSE), /* PC relative offset? */
209 /* GNU extension to record C++ vtable hierarchy. */
210 HOWTO (R_MICROBLAZE_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_MICROBLAZE_GNU_VTINHERIT", /* Name. */
219 FALSE, /* Partial Inplace. */
220 0, /* Source Mask. */
222 FALSE), /* PC relative offset? */
224 /* GNU extension to record C++ vtable member usage. */
225 HOWTO (R_MICROBLAZE_GNU_VTENTRY, /* Type. */
227 2, /* Size (0 = byte, 1 = short, 2 = long). */
229 FALSE, /* PC_relative. */
231 complain_overflow_dont,/* Complain on overflow. */
232 _bfd_elf_rel_vtable_reloc_fn, /* Special Function. */
233 "R_MICROBLAZE_GNU_VTENTRY", /* Name. */
234 FALSE, /* Partial Inplace. */
235 0, /* Source Mask. */
237 FALSE), /* PC relative offset? */
239 /* A 64 bit GOTPC relocation. Table-entry not really used. */
240 HOWTO (R_MICROBLAZE_GOTPC_64, /* Type. */
242 2, /* Size (0 = byte, 1 = short, 2 = long). */
244 TRUE, /* PC_relative. */
246 complain_overflow_dont, /* Complain on overflow. */
247 bfd_elf_generic_reloc, /* Special Function. */
248 "R_MICROBLAZE_GOTPC_64", /* Name. */
249 FALSE, /* Partial Inplace. */
250 0, /* Source Mask. */
251 0x0000ffff, /* Dest Mask. */
252 TRUE), /* PC relative offset? */
254 /* A 64 bit GOT relocation. Table-entry not really used. */
255 HOWTO (R_MICROBLAZE_GOT_64, /* Type. */
257 2, /* Size (0 = byte, 1 = short, 2 = long). */
259 FALSE, /* PC_relative. */
261 complain_overflow_dont, /* Complain on overflow. */
262 bfd_elf_generic_reloc,/* Special Function. */
263 "R_MICROBLAZE_GOT_64",/* Name. */
264 FALSE, /* Partial Inplace. */
265 0, /* Source Mask. */
266 0x0000ffff, /* Dest Mask. */
267 FALSE), /* PC relative offset? */
269 /* A 64 bit PLT relocation. Table-entry not really used. */
270 HOWTO (R_MICROBLAZE_PLT_64, /* Type. */
272 2, /* Size (0 = byte, 1 = short, 2 = long). */
274 TRUE, /* PC_relative. */
276 complain_overflow_dont, /* Complain on overflow. */
277 bfd_elf_generic_reloc,/* Special Function. */
278 "R_MICROBLAZE_PLT_64",/* Name. */
279 FALSE, /* Partial Inplace. */
280 0, /* Source Mask. */
281 0x0000ffff, /* Dest Mask. */
282 TRUE), /* PC relative offset? */
284 /* Table-entry not really used. */
285 HOWTO (R_MICROBLAZE_REL, /* Type. */
287 2, /* Size (0 = byte, 1 = short, 2 = long). */
289 TRUE, /* PC_relative. */
291 complain_overflow_dont, /* Complain on overflow. */
292 bfd_elf_generic_reloc,/* Special Function. */
293 "R_MICROBLAZE_REL", /* Name. */
294 FALSE, /* Partial Inplace. */
295 0, /* Source Mask. */
296 0x0000ffff, /* Dest Mask. */
297 TRUE), /* PC relative offset? */
299 /* Table-entry not really used. */
300 HOWTO (R_MICROBLAZE_JUMP_SLOT,/* Type. */
302 2, /* Size (0 = byte, 1 = short, 2 = long). */
304 TRUE, /* PC_relative. */
306 complain_overflow_dont, /* Complain on overflow. */
307 bfd_elf_generic_reloc,/* Special Function. */
308 "R_MICROBLAZE_JUMP_SLOT", /* Name. */
309 FALSE, /* Partial Inplace. */
310 0, /* Source Mask. */
311 0x0000ffff, /* Dest Mask. */
312 TRUE), /* PC relative offset? */
314 /* Table-entry not really used. */
315 HOWTO (R_MICROBLAZE_GLOB_DAT,/* Type. */
317 2, /* Size (0 = byte, 1 = short, 2 = long). */
319 TRUE, /* PC_relative. */
321 complain_overflow_dont, /* Complain on overflow. */
322 bfd_elf_generic_reloc,/* Special Function. */
323 "R_MICROBLAZE_GLOB_DAT", /* Name. */
324 FALSE, /* Partial Inplace. */
325 0, /* Source Mask. */
326 0x0000ffff, /* Dest Mask. */
327 TRUE), /* PC relative offset? */
329 /* A 64 bit GOT relative relocation. Table-entry not really used. */
330 HOWTO (R_MICROBLAZE_GOTOFF_64, /* Type. */
332 2, /* Size (0 = byte, 1 = short, 2 = long). */
334 FALSE, /* PC_relative. */
336 complain_overflow_dont, /* Complain on overflow. */
337 bfd_elf_generic_reloc,/* Special Function. */
338 "R_MICROBLAZE_GOTOFF_64", /* Name. */
339 FALSE, /* Partial Inplace. */
340 0, /* Source Mask. */
341 0x0000ffff, /* Dest Mask. */
342 FALSE), /* PC relative offset? */
344 /* A 32 bit GOT relative relocation. Table-entry not really used. */
345 HOWTO (R_MICROBLAZE_GOTOFF_32, /* Type. */
347 2, /* Size (0 = byte, 1 = short, 2 = long). */
349 FALSE, /* PC_relative. */
351 complain_overflow_dont, /* Complain on overflow. */
352 bfd_elf_generic_reloc, /* Special Function. */
353 "R_MICROBLAZE_GOTOFF_32", /* Name. */
354 FALSE, /* Partial Inplace. */
355 0, /* Source Mask. */
356 0x0000ffff, /* Dest Mask. */
357 FALSE), /* PC relative offset? */
359 /* COPY relocation. Table-entry not really used. */
360 HOWTO (R_MICROBLAZE_COPY, /* Type. */
362 2, /* Size (0 = byte, 1 = short, 2 = long). */
364 FALSE, /* PC_relative. */
366 complain_overflow_dont, /* Complain on overflow. */
367 bfd_elf_generic_reloc,/* Special Function. */
368 "R_MICROBLAZE_COPY", /* Name. */
369 FALSE, /* Partial Inplace. */
370 0, /* Source Mask. */
371 0x0000ffff, /* Dest Mask. */
372 FALSE), /* PC relative offset? */
374 /* Marker relocs for TLS. */
375 HOWTO (R_MICROBLAZE_TLS,
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 FALSE, /* pc_relative */
381 complain_overflow_dont, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 "R_MICROBLAZE_TLS", /* name */
384 FALSE, /* partial_inplace */
386 0x0000ffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
389 HOWTO (R_MICROBLAZE_TLSGD,
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE, /* pc_relative */
395 complain_overflow_dont, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* special_function */
397 "R_MICROBLAZE_TLSGD", /* name */
398 FALSE, /* partial_inplace */
400 0x0000ffff, /* dst_mask */
401 FALSE), /* pcrel_offset */
403 HOWTO (R_MICROBLAZE_TLSLD,
405 2, /* size (0 = byte, 1 = short, 2 = long) */
407 FALSE, /* pc_relative */
409 complain_overflow_dont, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* special_function */
411 "R_MICROBLAZE_TLSLD", /* name */
412 FALSE, /* partial_inplace */
414 0x0000ffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
417 /* Computes the load module index of the load module that contains the
418 definition of its TLS sym. */
419 HOWTO (R_MICROBLAZE_TLSDTPMOD32,
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 FALSE, /* pc_relative */
425 complain_overflow_dont, /* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_MICROBLAZE_TLSDTPMOD32", /* name */
428 FALSE, /* partial_inplace */
430 0x0000ffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
433 /* Computes a dtv-relative displacement, the difference between the value
434 of sym+add and the base address of the thread-local storage block that
435 contains the definition of sym, minus 0x8000. Used for initializing GOT */
436 HOWTO (R_MICROBLAZE_TLSDTPREL32,
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 FALSE, /* pc_relative */
442 complain_overflow_dont, /* complain_on_overflow */
443 bfd_elf_generic_reloc, /* special_function */
444 "R_MICROBLAZE_TLSDTPREL32", /* name */
445 FALSE, /* partial_inplace */
447 0x0000ffff, /* dst_mask */
448 FALSE), /* pcrel_offset */
450 /* Computes a dtv-relative displacement, the difference between the value
451 of sym+add and the base address of the thread-local storage block that
452 contains the definition of sym, minus 0x8000. */
453 HOWTO (R_MICROBLAZE_TLSDTPREL64,
455 2, /* size (0 = byte, 1 = short, 2 = long) */
457 FALSE, /* pc_relative */
459 complain_overflow_dont, /* complain_on_overflow */
460 bfd_elf_generic_reloc, /* special_function */
461 "R_MICROBLAZE_TLSDTPREL64", /* name */
462 FALSE, /* partial_inplace */
464 0x0000ffff, /* dst_mask */
465 FALSE), /* pcrel_offset */
467 /* Computes a tp-relative displacement, the difference between the value of
468 sym+add and the value of the thread pointer (r13). */
469 HOWTO (R_MICROBLAZE_TLSGOTTPREL32,
471 2, /* size (0 = byte, 1 = short, 2 = long) */
473 FALSE, /* pc_relative */
475 complain_overflow_dont, /* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_MICROBLAZE_TLSGOTTPREL32", /* name */
478 FALSE, /* partial_inplace */
480 0x0000ffff, /* dst_mask */
481 FALSE), /* pcrel_offset */
483 /* Computes a tp-relative displacement, the difference between the value of
484 sym+add and the value of the thread pointer (r13). */
485 HOWTO (R_MICROBLAZE_TLSTPREL32,
487 2, /* size (0 = byte, 1 = short, 2 = long) */
489 FALSE, /* pc_relative */
491 complain_overflow_dont, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_MICROBLAZE_TLSTPREL32", /* name */
494 FALSE, /* partial_inplace */
496 0x0000ffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
502 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
505 /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */
508 microblaze_elf_howto_init (void)
512 for (i = NUM_ELEM (microblaze_elf_howto_raw); i--;)
516 type = microblaze_elf_howto_raw[i].type;
518 BFD_ASSERT (type < NUM_ELEM (microblaze_elf_howto_table));
520 microblaze_elf_howto_table [type] = & microblaze_elf_howto_raw [i];
524 static reloc_howto_type *
525 microblaze_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
526 bfd_reloc_code_real_type code)
528 enum elf_microblaze_reloc_type microblaze_reloc = R_MICROBLAZE_NONE;
533 microblaze_reloc = R_MICROBLAZE_NONE;
535 case BFD_RELOC_MICROBLAZE_64_NONE:
536 microblaze_reloc = R_MICROBLAZE_64_NONE;
539 microblaze_reloc = R_MICROBLAZE_32;
541 /* RVA is treated the same as 32 */
543 microblaze_reloc = R_MICROBLAZE_32;
545 case BFD_RELOC_32_PCREL:
546 microblaze_reloc = R_MICROBLAZE_32_PCREL;
548 case BFD_RELOC_64_PCREL:
549 microblaze_reloc = R_MICROBLAZE_64_PCREL;
551 case BFD_RELOC_MICROBLAZE_32_LO_PCREL:
552 microblaze_reloc = R_MICROBLAZE_32_PCREL_LO;
555 microblaze_reloc = R_MICROBLAZE_64;
557 case BFD_RELOC_MICROBLAZE_32_LO:
558 microblaze_reloc = R_MICROBLAZE_32_LO;
560 case BFD_RELOC_MICROBLAZE_32_ROSDA:
561 microblaze_reloc = R_MICROBLAZE_SRO32;
563 case BFD_RELOC_MICROBLAZE_32_RWSDA:
564 microblaze_reloc = R_MICROBLAZE_SRW32;
566 case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM:
567 microblaze_reloc = R_MICROBLAZE_32_SYM_OP_SYM;
569 case BFD_RELOC_VTABLE_INHERIT:
570 microblaze_reloc = R_MICROBLAZE_GNU_VTINHERIT;
572 case BFD_RELOC_VTABLE_ENTRY:
573 microblaze_reloc = R_MICROBLAZE_GNU_VTENTRY;
575 case BFD_RELOC_MICROBLAZE_64_GOTPC:
576 microblaze_reloc = R_MICROBLAZE_GOTPC_64;
578 case BFD_RELOC_MICROBLAZE_64_GOT:
579 microblaze_reloc = R_MICROBLAZE_GOT_64;
581 case BFD_RELOC_MICROBLAZE_64_PLT:
582 microblaze_reloc = R_MICROBLAZE_PLT_64;
584 case BFD_RELOC_MICROBLAZE_64_GOTOFF:
585 microblaze_reloc = R_MICROBLAZE_GOTOFF_64;
587 case BFD_RELOC_MICROBLAZE_32_GOTOFF:
588 microblaze_reloc = R_MICROBLAZE_GOTOFF_32;
590 case BFD_RELOC_MICROBLAZE_64_TLSGD:
591 microblaze_reloc = R_MICROBLAZE_TLSGD;
593 case BFD_RELOC_MICROBLAZE_64_TLSLD:
594 microblaze_reloc = R_MICROBLAZE_TLSLD;
596 case BFD_RELOC_MICROBLAZE_32_TLSDTPREL:
597 microblaze_reloc = R_MICROBLAZE_TLSDTPREL32;
599 case BFD_RELOC_MICROBLAZE_64_TLSDTPREL:
600 microblaze_reloc = R_MICROBLAZE_TLSDTPREL64;
602 case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD:
603 microblaze_reloc = R_MICROBLAZE_TLSDTPMOD32;
605 case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL:
606 microblaze_reloc = R_MICROBLAZE_TLSGOTTPREL32;
608 case BFD_RELOC_MICROBLAZE_64_TLSTPREL:
609 microblaze_reloc = R_MICROBLAZE_TLSTPREL32;
611 case BFD_RELOC_MICROBLAZE_COPY:
612 microblaze_reloc = R_MICROBLAZE_COPY;
615 return (reloc_howto_type *) NULL;
618 if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
619 /* Initialize howto table if needed. */
620 microblaze_elf_howto_init ();
622 return microblaze_elf_howto_table [(int) microblaze_reloc];
625 static reloc_howto_type *
626 microblaze_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
631 for (i = 0; i < NUM_ELEM (microblaze_elf_howto_raw); i++)
632 if (microblaze_elf_howto_raw[i].name != NULL
633 && strcasecmp (microblaze_elf_howto_raw[i].name, r_name) == 0)
634 return µblaze_elf_howto_raw[i];
639 /* Set the howto pointer for a RCE ELF reloc. */
642 microblaze_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
644 Elf_Internal_Rela * dst)
648 if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
649 /* Initialize howto table if needed. */
650 microblaze_elf_howto_init ();
652 r_type = ELF32_R_TYPE (dst->r_info);
653 if (r_type >= R_MICROBLAZE_max)
655 (*_bfd_error_handler) (_("%A: unrecognised MicroBlaze reloc number: %d"),
657 bfd_set_error (bfd_error_bad_value);
658 r_type = R_MICROBLAZE_NONE;
661 cache_ptr->howto = microblaze_elf_howto_table [r_type];
664 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
667 microblaze_elf_is_local_label_name (bfd *abfd, const char *name)
669 if (name[0] == 'L' && name[1] == '.')
672 if (name[0] == '$' && name[1] == 'L')
675 /* With gcc, the labels go back to starting with '.', so we accept
676 the generic ELF local label syntax as well. */
677 return _bfd_elf_is_local_label_name (abfd, name);
680 /* The microblaze linker (like many others) needs to keep track of
681 the number of relocs that it decides to copy as dynamic relocs in
682 check_relocs for each symbol. This is so that it can later discard
683 them if they are found to be unnecessary. We store the information
684 in a field extending the regular ELF linker hash table. */
686 struct elf32_mb_dyn_relocs
688 struct elf32_mb_dyn_relocs *next;
690 /* The input section of the reloc. */
693 /* Total number of relocs copied for the input section. */
696 /* Number of pc-relative relocs copied for the input section. */
697 bfd_size_type pc_count;
700 /* ELF linker hash entry. */
702 struct elf32_mb_link_hash_entry
704 struct elf_link_hash_entry elf;
706 /* Track dynamic relocs copied for this symbol. */
707 struct elf32_mb_dyn_relocs *dyn_relocs;
709 /* TLS Reference Types for the symbol; Updated by check_relocs */
710 #define TLS_GD 1 /* GD reloc. */
711 #define TLS_LD 2 /* LD reloc. */
712 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
713 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
714 #define TLS_TLS 16 /* Any TLS reloc. */
715 unsigned char tls_mask;
719 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD))
720 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD))
721 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL))
722 #define IS_TLS_NONE(x) (x == 0)
724 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
726 /* ELF linker hash table. */
728 struct elf32_mb_link_hash_table
730 struct elf_link_hash_table elf;
732 /* Short-cuts to get to dynamic linker sections. */
741 /* Small local sym to section mapping cache. */
742 struct sym_cache sym_sec;
744 /* TLS Local Dynamic GOT Entry */
746 bfd_signed_vma refcount;
751 /* Nonzero if this section has TLS related relocations. */
752 #define has_tls_reloc sec_flg0
754 /* Get the ELF linker hash table from a link_info structure. */
756 #define elf32_mb_hash_table(p) \
757 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
758 == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL)
760 /* Create an entry in a microblaze ELF linker hash table. */
762 static struct bfd_hash_entry *
763 link_hash_newfunc (struct bfd_hash_entry *entry,
764 struct bfd_hash_table *table,
767 /* Allocate the structure if it has not already been allocated by a
771 entry = bfd_hash_allocate (table,
772 sizeof (struct elf32_mb_link_hash_entry));
777 /* Call the allocation method of the superclass. */
778 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
781 struct elf32_mb_link_hash_entry *eh;
783 eh = (struct elf32_mb_link_hash_entry *) entry;
784 eh->dyn_relocs = NULL;
791 /* Create a mb ELF linker hash table. */
793 static struct bfd_link_hash_table *
794 microblaze_elf_link_hash_table_create (bfd *abfd)
796 struct elf32_mb_link_hash_table *ret;
797 bfd_size_type amt = sizeof (struct elf32_mb_link_hash_table);
799 ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt);
803 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
804 sizeof (struct elf32_mb_link_hash_entry),
805 MICROBLAZE_ELF_DATA))
811 return &ret->elf.root;
814 /* Set the values of the small data pointers. */
817 microblaze_elf_final_sdp (struct bfd_link_info *info)
819 struct bfd_link_hash_entry *h;
821 h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
822 if (h != (struct bfd_link_hash_entry *) NULL
823 && h->type == bfd_link_hash_defined)
824 ro_small_data_pointer = (h->u.def.value
825 + h->u.def.section->output_section->vma
826 + h->u.def.section->output_offset);
828 h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
829 if (h != (struct bfd_link_hash_entry *) NULL
830 && h->type == bfd_link_hash_defined)
831 rw_small_data_pointer = (h->u.def.value
832 + h->u.def.section->output_section->vma
833 + h->u.def.section->output_offset);
837 dtprel_base (struct bfd_link_info *info)
839 /* If tls_sec is NULL, we should have signalled an error already. */
840 if (elf_hash_table (info)->tls_sec == NULL)
842 return elf_hash_table (info)->tls_sec->vma;
845 /* The size of the thread control block. */
848 /* Output a simple dynamic relocation into SRELOC. */
851 microblaze_elf_output_dynamic_relocation (bfd *output_bfd,
853 unsigned long reloc_index,
860 Elf_Internal_Rela rel;
862 rel.r_info = ELF32_R_INFO (indx, r_type);
863 rel.r_offset = offset;
864 rel.r_addend = addend;
866 bfd_elf32_swap_reloca_out (output_bfd, &rel,
867 (sreloc->contents + reloc_index * sizeof (Elf32_External_Rela)));
870 /* This code is taken from elf32-m32r.c
871 There is some attempt to make this function usable for many architectures,
872 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
873 if only to serve as a learning tool.
875 The RELOCATE_SECTION function is called by the new ELF backend linker
876 to handle the relocations for a section.
878 The relocs are always passed as Rela structures; if the section
879 actually uses Rel structures, the r_addend field will always be
882 This function is responsible for adjust the section contents as
883 necessary, and (if using Rela relocs and generating a
884 relocatable output file) adjusting the reloc addend as
887 This function does not have to worry about setting the reloc
888 address or the reloc symbol index.
890 LOCAL_SYMS is a pointer to the swapped in local symbols.
892 LOCAL_SECTIONS is an array giving the section in the input file
893 corresponding to the st_shndx field of each local symbol.
895 The global hash table entry for the global symbols can be found
896 via elf_sym_hashes (input_bfd).
898 When generating relocatable output, this function must handle
899 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
900 going to be the section symbol corresponding to the output
901 section, which means that the addend must be adjusted
905 microblaze_elf_relocate_section (bfd *output_bfd,
906 struct bfd_link_info *info,
908 asection *input_section,
910 Elf_Internal_Rela *relocs,
911 Elf_Internal_Sym *local_syms,
912 asection **local_sections)
914 struct elf32_mb_link_hash_table *htab;
915 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
916 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
917 Elf_Internal_Rela *rel, *relend;
918 int endian = (bfd_little_endian (output_bfd)) ? 0 : 2;
919 /* Assume success. */
920 bfd_boolean ret = TRUE;
922 bfd_vma *local_got_offsets;
923 unsigned int tls_type;
925 if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1])
926 microblaze_elf_howto_init ();
928 htab = elf32_mb_hash_table (info);
932 local_got_offsets = elf_local_got_offsets (input_bfd);
934 sreloc = elf_section_data (input_section)->sreloc;
937 relend = relocs + input_section->reloc_count;
938 for (; rel < relend; rel++)
941 reloc_howto_type *howto;
942 unsigned long r_symndx;
943 bfd_vma addend = rel->r_addend;
944 bfd_vma offset = rel->r_offset;
945 struct elf_link_hash_entry *h;
946 Elf_Internal_Sym *sym;
948 const char *sym_name;
949 bfd_reloc_status_type r = bfd_reloc_ok;
950 const char *errmsg = NULL;
951 bfd_boolean unresolved_reloc = FALSE;
954 r_type = ELF32_R_TYPE (rel->r_info);
957 if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max)
959 (*_bfd_error_handler) (_("%s: unknown relocation type %d"),
960 bfd_get_filename (input_bfd), (int) r_type);
961 bfd_set_error (bfd_error_bad_value);
966 howto = microblaze_elf_howto_table[r_type];
967 r_symndx = ELF32_R_SYM (rel->r_info);
969 if (info->relocatable)
971 /* This is a relocatable link. We don't have to change
972 anything, unless the reloc is against a section symbol,
973 in which case we have to adjust according to where the
974 section symbol winds up in the output section. */
976 if (r_symndx >= symtab_hdr->sh_info)
977 /* External symbol. */
981 sym = local_syms + r_symndx;
982 sym_name = "<local symbol>";
983 /* STT_SECTION: symbol is associated with a section. */
984 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
985 /* Symbol isn't associated with a section. Nothing to do. */
988 sec = local_sections[r_symndx];
989 addend += sec->output_offset + sym->st_value;
991 /* This can't be done for USE_REL because it doesn't mean anything
992 and elf_link_input_bfd asserts this stays zero. */
993 /* rel->r_addend = addend; */
997 /* Addends are stored with relocs. We're done. */
1000 /* If partial_inplace, we need to store any additional addend
1001 back in the section. */
1002 if (!howto->partial_inplace)
1004 /* ??? Here is a nice place to call a special_function like handler. */
1005 r = _bfd_relocate_contents (howto, input_bfd, addend,
1007 #endif /* USE_REL */
1013 /* This is a final link. */
1016 unresolved_reloc = FALSE;
1018 if (r_symndx < symtab_hdr->sh_info)
1021 sym = local_syms + r_symndx;
1022 sec = local_sections[r_symndx];
1025 sym_name = "<local symbol>";
1026 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1027 /* r_addend may have changed if the reference section was
1029 addend = rel->r_addend;
1033 /* External symbol. */
1034 bfd_boolean warned ATTRIBUTE_UNUSED;
1035 bfd_boolean ignored ATTRIBUTE_UNUSED;
1037 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1038 r_symndx, symtab_hdr, sym_hashes,
1040 unresolved_reloc, warned, ignored);
1041 sym_name = h->root.root.string;
1044 /* Sanity check the address. */
1045 if (offset > bfd_get_section_limit (input_bfd, input_section))
1047 r = bfd_reloc_outofrange;
1051 switch ((int) r_type)
1053 case (int) R_MICROBLAZE_SRO32 :
1057 /* Only relocate if the symbol is defined. */
1060 name = bfd_get_section_name (sec->owner, sec);
1062 if (strcmp (name, ".sdata2") == 0
1063 || strcmp (name, ".sbss2") == 0)
1065 if (ro_small_data_pointer == 0)
1066 microblaze_elf_final_sdp (info);
1067 if (ro_small_data_pointer == 0)
1070 r = bfd_reloc_undefined;
1074 /* At this point `relocation' contains the object's
1076 relocation -= ro_small_data_pointer;
1077 /* Now it contains the offset from _SDA2_BASE_. */
1078 r = _bfd_final_link_relocate (howto, input_bfd,
1081 relocation, addend);
1085 (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
1086 bfd_get_filename (input_bfd),
1088 microblaze_elf_howto_table[(int) r_type]->name,
1089 bfd_get_section_name (sec->owner, sec));
1090 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1098 case (int) R_MICROBLAZE_SRW32 :
1102 /* Only relocate if the symbol is defined. */
1105 name = bfd_get_section_name (sec->owner, sec);
1107 if (strcmp (name, ".sdata") == 0
1108 || strcmp (name, ".sbss") == 0)
1110 if (rw_small_data_pointer == 0)
1111 microblaze_elf_final_sdp (info);
1112 if (rw_small_data_pointer == 0)
1115 r = bfd_reloc_undefined;
1119 /* At this point `relocation' contains the object's
1121 relocation -= rw_small_data_pointer;
1122 /* Now it contains the offset from _SDA_BASE_. */
1123 r = _bfd_final_link_relocate (howto, input_bfd,
1126 relocation, addend);
1130 (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
1131 bfd_get_filename (input_bfd),
1133 microblaze_elf_howto_table[(int) r_type]->name,
1134 bfd_get_section_name (sec->owner, sec));
1135 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1143 case (int) R_MICROBLAZE_32_SYM_OP_SYM:
1144 break; /* Do nothing. */
1146 case (int) R_MICROBLAZE_GOTPC_64:
1147 relocation = htab->sgotplt->output_section->vma
1148 + htab->sgotplt->output_offset;
1149 relocation -= (input_section->output_section->vma
1150 + input_section->output_offset
1151 + offset + INST_WORD_SIZE);
1152 relocation += addend;
1153 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1154 contents + offset + endian);
1155 bfd_put_16 (input_bfd, relocation & 0xffff,
1156 contents + offset + endian + INST_WORD_SIZE);
1159 case (int) R_MICROBLAZE_PLT_64:
1162 if (htab->splt != NULL && h != NULL
1163 && h->plt.offset != (bfd_vma) -1)
1165 relocation = (htab->splt->output_section->vma
1166 + htab->splt->output_offset
1168 unresolved_reloc = FALSE;
1169 immediate = relocation - (input_section->output_section->vma
1170 + input_section->output_offset
1171 + offset + INST_WORD_SIZE);
1172 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1173 contents + offset + endian);
1174 bfd_put_16 (input_bfd, immediate & 0xffff,
1175 contents + offset + endian + INST_WORD_SIZE);
1179 relocation -= (input_section->output_section->vma
1180 + input_section->output_offset
1181 + offset + INST_WORD_SIZE);
1182 immediate = relocation;
1183 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1184 contents + offset + endian);
1185 bfd_put_16 (input_bfd, immediate & 0xffff,
1186 contents + offset + endian + INST_WORD_SIZE);
1191 case (int) R_MICROBLAZE_TLSGD:
1192 tls_type = (TLS_TLS | TLS_GD);
1194 case (int) R_MICROBLAZE_TLSLD:
1195 tls_type = (TLS_TLS | TLS_LD);
1197 case (int) R_MICROBLAZE_GOT_64:
1202 bfd_vma static_value;
1204 bfd_boolean need_relocs = FALSE;
1205 if (htab->sgot == NULL)
1211 /* 1. Identify GOT Offset;
1212 2. Compute Static Values
1213 3. Process Module Id, Process Offset
1214 4. Fixup Relocation with GOT offset value. */
1216 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1217 if (IS_TLS_LD (tls_type))
1218 offp = &htab->tlsld_got.offset;
1221 if (htab->sgotplt != NULL && h->got.offset != (bfd_vma) -1)
1222 offp = &h->got.offset;
1228 if (local_got_offsets == NULL)
1230 offp = &local_got_offsets[r_symndx];
1239 if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type))
1242 /* Symbol index to use for relocs */
1246 elf_hash_table (info)->dynamic_sections_created;
1248 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1249 && (!info->shared || !SYMBOL_REFERENCES_LOCAL (info, h)))
1253 /* Need to generate relocs ? */
1254 if ((info->shared || indx != 0)
1256 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1257 || h->root.type != bfd_link_hash_undefweak))
1260 /* 2. Compute/Emit Static value of r-expression */
1261 static_value = relocation + addend;
1263 /* 3. Process module-id and offset */
1264 if (! ((*offp) & 1) )
1268 got_offset = (htab->sgot->output_section->vma
1269 + htab->sgot->output_offset
1272 /* Process module-id */
1273 if (IS_TLS_LD(tls_type))
1277 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off);
1281 microblaze_elf_output_dynamic_relocation (output_bfd,
1282 htab->srelgot, htab->srelgot->reloc_count++,
1283 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32,
1287 else if (IS_TLS_GD(tls_type))
1291 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off);
1295 microblaze_elf_output_dynamic_relocation (output_bfd,
1297 htab->srelgot->reloc_count++,
1298 /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32,
1299 got_offset, indx ? 0 : static_value);
1303 /* Process Offset */
1304 if (htab->srelgot == NULL)
1307 got_offset = (htab->sgot->output_section->vma
1308 + htab->sgot->output_offset
1310 if (IS_TLS_LD(tls_type))
1312 /* For LD, offset should be 0 */
1314 bfd_put_32 (output_bfd, 0, htab->sgot->contents + off2);
1316 else if (IS_TLS_GD(tls_type))
1319 static_value -= dtprel_base(info);
1322 microblaze_elf_output_dynamic_relocation (output_bfd,
1323 htab->srelgot, htab->srelgot->reloc_count++,
1324 /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32,
1325 got_offset, indx ? 0 : static_value);
1329 bfd_put_32 (output_bfd, static_value,
1330 htab->sgot->contents + off2);
1335 bfd_put_32 (output_bfd, static_value,
1336 htab->sgot->contents + off2);
1338 /* Relocs for dyn symbols generated by
1339 finish_dynamic_symbols */
1340 if (info->shared && h == NULL)
1343 microblaze_elf_output_dynamic_relocation (output_bfd,
1344 htab->srelgot, htab->srelgot->reloc_count++,
1345 /* symindex= */ indx, R_MICROBLAZE_REL,
1346 got_offset, static_value);
1351 /* 4. Fixup Relocation with GOT offset value
1352 Compute relative address of GOT entry for applying
1353 the current relocation */
1354 relocation = htab->sgot->output_section->vma
1355 + htab->sgot->output_offset
1357 - htab->sgotplt->output_section->vma
1358 - htab->sgotplt->output_offset;
1360 /* Apply Current Relocation */
1361 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1362 contents + offset + endian);
1363 bfd_put_16 (input_bfd, relocation & 0xffff,
1364 contents + offset + endian + INST_WORD_SIZE);
1366 unresolved_reloc = FALSE;
1370 case (int) R_MICROBLAZE_GOTOFF_64:
1373 unsigned short lo, high;
1374 relocation += addend;
1375 relocation -= htab->sgotplt->output_section->vma
1376 + htab->sgotplt->output_offset;
1377 /* Write this value into correct location. */
1378 immediate = relocation;
1379 lo = immediate & 0x0000ffff;
1380 high = (immediate >> 16) & 0x0000ffff;
1381 bfd_put_16 (input_bfd, high, contents + offset + endian);
1382 bfd_put_16 (input_bfd, lo, contents + offset + INST_WORD_SIZE + endian);
1386 case (int) R_MICROBLAZE_GOTOFF_32:
1388 relocation += addend;
1389 relocation -= htab->sgotplt->output_section->vma
1390 + htab->sgotplt->output_offset;
1391 /* Write this value into correct location. */
1392 bfd_put_32 (input_bfd, relocation, contents + offset);
1396 case (int) R_MICROBLAZE_TLSDTPREL64:
1397 relocation += addend;
1398 relocation -= dtprel_base(info);
1399 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1400 contents + offset + 2);
1401 bfd_put_16 (input_bfd, relocation & 0xffff,
1402 contents + offset + 2 + INST_WORD_SIZE);
1404 case (int) R_MICROBLAZE_64_PCREL :
1405 case (int) R_MICROBLAZE_64:
1406 case (int) R_MICROBLAZE_32:
1408 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1409 from removed linkonce sections, or sections discarded by
1411 if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0)
1413 relocation += addend;
1414 if (r_type == R_MICROBLAZE_32)
1415 bfd_put_32 (input_bfd, relocation, contents + offset);
1418 if (r_type == R_MICROBLAZE_64_PCREL)
1419 relocation -= (input_section->output_section->vma
1420 + input_section->output_offset
1421 + offset + INST_WORD_SIZE);
1422 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1423 contents + offset + endian);
1424 bfd_put_16 (input_bfd, relocation & 0xffff,
1425 contents + offset + endian + INST_WORD_SIZE);
1432 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1433 || h->root.type != bfd_link_hash_undefweak)
1434 && (!howto->pc_relative
1438 || !h->def_regular))))
1445 || h->root.type == bfd_link_hash_undefweak
1446 || h->root.type == bfd_link_hash_undefined)))
1448 Elf_Internal_Rela outrel;
1452 /* When generating a shared object, these relocations
1453 are copied into the output file to be resolved at run
1456 BFD_ASSERT (sreloc != NULL);
1461 _bfd_elf_section_offset (output_bfd, info, input_section,
1463 if (outrel.r_offset == (bfd_vma) -1)
1465 else if (outrel.r_offset == (bfd_vma) -2)
1467 outrel.r_offset += (input_section->output_section->vma
1468 + input_section->output_offset);
1471 memset (&outrel, 0, sizeof outrel);
1472 /* h->dynindx may be -1 if the symbol was marked to
1475 && ((! info->symbolic && h->dynindx != -1)
1476 || !h->def_regular))
1478 BFD_ASSERT (h->dynindx != -1);
1479 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1480 outrel.r_addend = addend;
1484 if (r_type == R_MICROBLAZE_32)
1486 outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
1487 outrel.r_addend = relocation + addend;
1492 (*_bfd_error_handler)
1493 (_("%B: probably compiled without -fPIC?"),
1495 bfd_set_error (bfd_error_bad_value);
1500 loc = sreloc->contents;
1501 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1502 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1507 relocation += addend;
1508 if (r_type == R_MICROBLAZE_32)
1509 bfd_put_32 (input_bfd, relocation, contents + offset);
1512 if (r_type == R_MICROBLAZE_64_PCREL)
1513 relocation -= (input_section->output_section->vma
1514 + input_section->output_offset
1515 + offset + INST_WORD_SIZE);
1516 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1517 contents + offset + endian);
1518 bfd_put_16 (input_bfd, relocation & 0xffff,
1519 contents + offset + endian + INST_WORD_SIZE);
1526 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1528 relocation, addend);
1535 if (r != bfd_reloc_ok)
1537 /* FIXME: This should be generic enough to go in a utility. */
1541 name = h->root.root.string;
1544 name = (bfd_elf_string_from_elf_section
1545 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1546 if (name == NULL || *name == '\0')
1547 name = bfd_section_name (input_bfd, sec);
1555 case bfd_reloc_overflow:
1556 if (!((*info->callbacks->reloc_overflow)
1557 (info, (h ? &h->root : NULL), name, howto->name,
1558 (bfd_vma) 0, input_bfd, input_section, offset)))
1562 case bfd_reloc_undefined:
1563 if (!((*info->callbacks->undefined_symbol)
1564 (info, name, input_bfd, input_section, offset, TRUE)))
1568 case bfd_reloc_outofrange:
1569 errmsg = _("internal error: out of range error");
1572 case bfd_reloc_notsupported:
1573 errmsg = _("internal error: unsupported relocation error");
1576 case bfd_reloc_dangerous:
1577 errmsg = _("internal error: dangerous error");
1581 errmsg = _("internal error: unknown error");
1584 if (!((*info->callbacks->warning)
1585 (info, errmsg, name, input_bfd, input_section, offset)))
1595 /* Merge backend specific data from an object file to the output
1596 object file when linking.
1598 Note: We only use this hook to catch endian mismatches. */
1600 microblaze_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
1602 /* Check if we have the same endianess. */
1603 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
1610 /* Calculate fixup value for reference. */
1613 calc_fixup (bfd_vma start, bfd_vma size, asection *sec)
1615 bfd_vma end = start + size;
1618 if (sec == NULL || sec->relax == NULL)
1621 /* Look for addr in relax table, total fixup value. */
1622 for (i = 0; i < sec->relax_count; i++)
1624 if (end <= sec->relax[i].addr)
1626 if ((end != start) && (start > sec->relax[i].addr))
1628 fixup += sec->relax[i].size;
1633 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1634 a 32-bit instruction. */
1636 microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1638 unsigned long instr = bfd_get_32 (abfd, bfd_addr);
1639 instr &= ~0x0000ffff;
1640 instr |= (val & 0x0000ffff);
1641 bfd_put_32 (abfd, instr, bfd_addr);
1644 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1645 two consecutive 32-bit instructions. */
1647 microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1649 unsigned long instr_hi;
1650 unsigned long instr_lo;
1652 instr_hi = bfd_get_32 (abfd, bfd_addr);
1653 instr_hi &= ~0x0000ffff;
1654 instr_hi |= ((val >> 16) & 0x0000ffff);
1655 bfd_put_32 (abfd, instr_hi, bfd_addr);
1657 instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE);
1658 instr_lo &= ~0x0000ffff;
1659 instr_lo |= (val & 0x0000ffff);
1660 bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE);
1664 microblaze_elf_relax_section (bfd *abfd,
1666 struct bfd_link_info *link_info,
1669 Elf_Internal_Shdr *symtab_hdr;
1670 Elf_Internal_Rela *internal_relocs;
1671 Elf_Internal_Rela *free_relocs = NULL;
1672 Elf_Internal_Rela *irel, *irelend;
1673 bfd_byte *contents = NULL;
1674 bfd_byte *free_contents = NULL;
1679 struct elf_link_hash_entry *sym_hash;
1680 Elf_Internal_Sym *isymbuf, *isymend;
1681 Elf_Internal_Sym *isym;
1686 /* We only do this once per section. We may be able to delete some code
1687 by running multiple passes, but it is not worth it. */
1690 /* Only do this for a text section. */
1691 if (link_info->relocatable
1692 || (sec->flags & SEC_RELOC) == 0
1693 || (sec->reloc_count == 0)
1694 || (sec->flags & SEC_CODE) == 0)
1697 BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0));
1699 /* If this is the first time we have been called for this section,
1700 initialize the cooked size. */
1702 sec->size = sec->rawsize;
1704 /* Get symbols for this section. */
1705 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1706 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1707 symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
1708 if (isymbuf == NULL)
1709 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount,
1710 0, NULL, NULL, NULL);
1711 BFD_ASSERT (isymbuf != NULL);
1713 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
1714 if (internal_relocs == NULL)
1716 if (! link_info->keep_memory)
1717 free_relocs = internal_relocs;
1719 sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1)
1720 * sizeof (struct relax_table));
1721 if (sec->relax == NULL)
1723 sec->relax_count = 0;
1725 irelend = internal_relocs + sec->reloc_count;
1727 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1730 if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL)
1731 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64 ))
1732 continue; /* Can't delete this reloc. */
1734 /* Get the section contents. */
1735 if (contents == NULL)
1737 if (elf_section_data (sec)->this_hdr.contents != NULL)
1738 contents = elf_section_data (sec)->this_hdr.contents;
1741 contents = (bfd_byte *) bfd_malloc (sec->size);
1742 if (contents == NULL)
1744 free_contents = contents;
1746 if (!bfd_get_section_contents (abfd, sec, contents,
1747 (file_ptr) 0, sec->size))
1749 elf_section_data (sec)->this_hdr.contents = contents;
1753 /* Get the value of the symbol referred to by the reloc. */
1754 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1756 /* A local symbol. */
1759 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1760 if (isym->st_shndx == SHN_UNDEF)
1761 sym_sec = bfd_und_section_ptr;
1762 else if (isym->st_shndx == SHN_ABS)
1763 sym_sec = bfd_abs_section_ptr;
1764 else if (isym->st_shndx == SHN_COMMON)
1765 sym_sec = bfd_com_section_ptr;
1767 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1769 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
1774 struct elf_link_hash_entry *h;
1776 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1777 h = elf_sym_hashes (abfd)[indx];
1778 BFD_ASSERT (h != NULL);
1780 if (h->root.type != bfd_link_hash_defined
1781 && h->root.type != bfd_link_hash_defweak)
1782 /* This appears to be a reference to an undefined
1783 symbol. Just ignore it--it will be caught by the
1784 regular reloc processing. */
1787 symval = (h->root.u.def.value
1788 + h->root.u.def.section->output_section->vma
1789 + h->root.u.def.section->output_offset);
1792 /* If this is a PC-relative reloc, subtract the instr offset from
1793 the symbol value. */
1794 if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL)
1796 symval = symval + irel->r_addend
1798 + sec->output_section->vma
1799 + sec->output_offset);
1802 symval += irel->r_addend;
1804 if ((symval & 0xffff8000) == 0
1805 || (symval & 0xffff8000) == 0xffff8000)
1807 /* We can delete this instruction. */
1808 sec->relax[sec->relax_count].addr = irel->r_offset;
1809 sec->relax[sec->relax_count].size = INST_WORD_SIZE;
1812 /* Rewrite relocation type. */
1813 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1815 case R_MICROBLAZE_64_PCREL:
1816 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1817 (int) R_MICROBLAZE_32_PCREL_LO);
1819 case R_MICROBLAZE_64:
1820 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1821 (int) R_MICROBLAZE_32_LO);
1824 /* Cannot happen. */
1828 } /* Loop through all relocations. */
1830 /* Loop through the relocs again, and see if anything needs to change. */
1831 if (sec->relax_count > 0)
1833 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1835 sec->relax[sec->relax_count].addr = sec->size;
1837 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1841 /* Get the new reloc address. */
1842 nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec);
1843 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1847 case R_MICROBLAZE_64_PCREL:
1849 case R_MICROBLAZE_64:
1850 case R_MICROBLAZE_32_LO:
1851 /* If this reloc is against a symbol defined in this
1852 section, we must check the addend to see it will put the value in
1853 range to be adjusted, and hence must be changed. */
1854 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1856 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1857 /* Only handle relocs against .text. */
1858 if (isym->st_shndx == shndx
1859 && ELF32_ST_TYPE (isym->st_info) == STT_SECTION)
1860 irel->r_addend -= calc_fixup (irel->r_addend, 0, sec);
1863 case R_MICROBLAZE_NONE:
1865 /* This was a PC-relative instruction that was
1866 completely resolved. */
1868 bfd_vma target_address;
1869 target_address = irel->r_addend + irel->r_offset;
1870 sfix = calc_fixup (irel->r_offset, 0, sec);
1871 efix = calc_fixup (target_address, 0, sec);
1872 irel->r_addend -= (efix - sfix);
1873 /* Should use HOWTO. */
1874 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset,
1878 case R_MICROBLAZE_64_NONE:
1880 /* This was a PC-relative 64-bit instruction that was
1881 completely resolved. */
1883 bfd_vma target_address;
1884 target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE;
1885 sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec);
1886 efix = calc_fixup (target_address, 0, sec);
1887 irel->r_addend -= (efix - sfix);
1888 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset
1889 + INST_WORD_SIZE, irel->r_addend);
1893 irel->r_offset = nraddr;
1894 } /* Change all relocs in this section. */
1896 /* Look through all other sections. */
1897 for (o = abfd->sections; o != NULL; o = o->next)
1899 Elf_Internal_Rela *irelocs;
1900 Elf_Internal_Rela *irelscan, *irelscanend;
1901 bfd_byte *ocontents;
1904 || (o->flags & SEC_RELOC) == 0
1905 || o->reloc_count == 0)
1908 /* We always cache the relocs. Perhaps, if info->keep_memory is
1909 FALSE, we should free them, if we are permitted to. */
1911 irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE);
1912 if (irelocs == NULL)
1916 irelscanend = irelocs + o->reloc_count;
1917 for (irelscan = irelocs; irelscan < irelscanend; irelscan++)
1919 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32)
1921 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1923 /* Look at the reloc only if the value has been resolved. */
1924 if (isym->st_shndx == shndx
1925 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1927 if (ocontents == NULL)
1929 if (elf_section_data (o)->this_hdr.contents != NULL)
1930 ocontents = elf_section_data (o)->this_hdr.contents;
1933 /* We always cache the section contents.
1934 Perhaps, if info->keep_memory is FALSE, we
1935 should free them, if we are permitted to. */
1936 if (o->rawsize == 0)
1937 o->rawsize = o->size;
1938 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1939 if (ocontents == NULL)
1941 if (!bfd_get_section_contents (abfd, o, ocontents,
1945 elf_section_data (o)->this_hdr.contents = ocontents;
1949 irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec);
1951 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM)
1953 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1955 /* Look at the reloc only if the value has been resolved. */
1956 if (ocontents == NULL)
1958 if (elf_section_data (o)->this_hdr.contents != NULL)
1959 ocontents = elf_section_data (o)->this_hdr.contents;
1962 /* We always cache the section contents.
1963 Perhaps, if info->keep_memory is FALSE, we
1964 should free them, if we are permitted to. */
1966 if (o->rawsize == 0)
1967 o->rawsize = o->size;
1968 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1969 if (ocontents == NULL)
1971 if (!bfd_get_section_contents (abfd, o, ocontents,
1975 elf_section_data (o)->this_hdr.contents = ocontents;
1978 irelscan->r_addend -= calc_fixup (irel->r_addend
1984 else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO)
1985 || (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_LO))
1987 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1989 /* Look at the reloc only if the value has been resolved. */
1990 if (isym->st_shndx == shndx
1991 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1994 bfd_vma target_address;
1996 if (ocontents == NULL)
1998 if (elf_section_data (o)->this_hdr.contents != NULL)
1999 ocontents = elf_section_data (o)->this_hdr.contents;
2002 /* We always cache the section contents.
2003 Perhaps, if info->keep_memory is FALSE, we
2004 should free them, if we are permitted to. */
2005 if (o->rawsize == 0)
2006 o->rawsize = o->size;
2007 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2008 if (ocontents == NULL)
2010 if (!bfd_get_section_contents (abfd, o, ocontents,
2014 elf_section_data (o)->this_hdr.contents = ocontents;
2018 unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
2019 immediate = instr & 0x0000ffff;
2020 target_address = immediate;
2021 offset = calc_fixup (target_address, 0, sec);
2022 immediate -= offset;
2023 irelscan->r_addend -= offset;
2024 microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset,
2025 irelscan->r_addend);
2029 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64)
2031 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2033 /* Look at the reloc only if the value has been resolved. */
2034 if (isym->st_shndx == shndx
2035 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2039 if (ocontents == NULL)
2041 if (elf_section_data (o)->this_hdr.contents != NULL)
2042 ocontents = elf_section_data (o)->this_hdr.contents;
2045 /* We always cache the section contents.
2046 Perhaps, if info->keep_memory is FALSE, we
2047 should free them, if we are permitted to. */
2049 if (o->rawsize == 0)
2050 o->rawsize = o->size;
2051 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2052 if (ocontents == NULL)
2054 if (!bfd_get_section_contents (abfd, o, ocontents,
2058 elf_section_data (o)->this_hdr.contents = ocontents;
2061 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2062 + irelscan->r_offset);
2063 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2064 + irelscan->r_offset
2066 immediate = (instr_hi & 0x0000ffff) << 16;
2067 immediate |= (instr_lo & 0x0000ffff);
2068 offset = calc_fixup (irelscan->r_addend, 0, sec);
2069 immediate -= offset;
2070 irelscan->r_addend -= offset;
2073 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL)
2075 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2077 /* Look at the reloc only if the value has been resolved. */
2078 if (isym->st_shndx == shndx
2079 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2082 bfd_vma target_address;
2084 if (ocontents == NULL)
2086 if (elf_section_data (o)->this_hdr.contents != NULL)
2087 ocontents = elf_section_data (o)->this_hdr.contents;
2090 /* We always cache the section contents.
2091 Perhaps, if info->keep_memory is FALSE, we
2092 should free them, if we are permitted to. */
2093 if (o->rawsize == 0)
2094 o->rawsize = o->size;
2095 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2096 if (ocontents == NULL)
2098 if (!bfd_get_section_contents (abfd, o, ocontents,
2102 elf_section_data (o)->this_hdr.contents = ocontents;
2105 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2106 + irelscan->r_offset);
2107 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2108 + irelscan->r_offset
2110 immediate = (instr_hi & 0x0000ffff) << 16;
2111 immediate |= (instr_lo & 0x0000ffff);
2112 target_address = immediate;
2113 offset = calc_fixup (target_address, 0, sec);
2114 immediate -= offset;
2115 irelscan->r_addend -= offset;
2116 microblaze_bfd_write_imm_value_64 (abfd, ocontents
2117 + irelscan->r_offset, immediate);
2123 /* Adjust the local symbols defined in this section. */
2124 isymend = isymbuf + symtab_hdr->sh_info;
2125 for (isym = isymbuf; isym < isymend; isym++)
2127 if (isym->st_shndx == shndx)
2129 isym->st_value -= calc_fixup (isym->st_value, 0, sec);
2131 isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec);
2135 /* Now adjust the global symbols defined in this section. */
2136 isym = isymbuf + symtab_hdr->sh_info;
2137 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info;
2138 for (sym_index = 0; sym_index < symcount; sym_index++)
2140 sym_hash = elf_sym_hashes (abfd)[sym_index];
2141 if ((sym_hash->root.type == bfd_link_hash_defined
2142 || sym_hash->root.type == bfd_link_hash_defweak)
2143 && sym_hash->root.u.def.section == sec)
2145 sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value,
2148 sym_hash->size -= calc_fixup (sym_hash->root.u.def.value,
2149 sym_hash->size, sec);
2153 /* Physically move the code and change the cooked size. */
2154 dest = sec->relax[0].addr;
2155 for (i = 0; i < sec->relax_count; i++)
2158 src = sec->relax[i].addr + sec->relax[i].size;
2159 len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size;
2161 memmove (contents + dest, contents + src, len);
2162 sec->size -= sec->relax[i].size;
2166 elf_section_data (sec)->relocs = internal_relocs;
2169 elf_section_data (sec)->this_hdr.contents = contents;
2170 free_contents = NULL;
2172 symtab_hdr->contents = (bfd_byte *) isymbuf;
2175 if (free_relocs != NULL)
2181 if (free_contents != NULL)
2183 if (!link_info->keep_memory)
2184 free (free_contents);
2186 /* Cache the section contents for elf_link_input_bfd. */
2187 elf_section_data (sec)->this_hdr.contents = contents;
2188 free_contents = NULL;
2191 if (sec->relax_count == 0)
2202 if (free_relocs != NULL)
2204 if (free_contents != NULL)
2205 free (free_contents);
2206 if (sec->relax != NULL)
2210 sec->relax_count = 0;
2215 /* Return the section that should be marked against GC for a given
2219 microblaze_elf_gc_mark_hook (asection *sec,
2220 struct bfd_link_info * info,
2221 Elf_Internal_Rela * rel,
2222 struct elf_link_hash_entry * h,
2223 Elf_Internal_Sym * sym)
2226 switch (ELF32_R_TYPE (rel->r_info))
2228 case R_MICROBLAZE_GNU_VTINHERIT:
2229 case R_MICROBLAZE_GNU_VTENTRY:
2233 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2236 /* Update the got entry reference counts for the section being removed. */
2239 microblaze_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
2240 struct bfd_link_info * info ATTRIBUTE_UNUSED,
2241 asection * sec ATTRIBUTE_UNUSED,
2242 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
2249 #define PLT_ENTRY_SIZE 16
2251 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2252 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2253 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2254 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2255 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2257 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
2258 shortcuts to them in our hash table. */
2261 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2263 struct elf32_mb_link_hash_table *htab;
2265 if (! _bfd_elf_create_got_section (dynobj, info))
2267 htab = elf32_mb_hash_table (info);
2271 htab->sgot = bfd_get_linker_section (dynobj, ".got");
2272 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2273 if (!htab->sgot || !htab->sgotplt)
2276 if ((htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got")) == NULL)
2277 htab->srelgot = bfd_make_section_anyway (dynobj, ".rela.got");
2278 if (htab->srelgot == NULL
2279 || ! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC
2283 | SEC_LINKER_CREATED
2285 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2291 update_local_sym_info (bfd *abfd,
2292 Elf_Internal_Shdr *symtab_hdr,
2293 unsigned long r_symndx,
2294 unsigned int tls_type)
2296 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2297 unsigned char *local_got_tls_masks;
2299 if (local_got_refcounts == NULL)
2301 bfd_size_type size = symtab_hdr->sh_info;
2303 size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks));
2304 local_got_refcounts = bfd_zalloc (abfd, size);
2305 if (local_got_refcounts == NULL)
2307 elf_local_got_refcounts (abfd) = local_got_refcounts;
2310 local_got_tls_masks =
2311 (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info);
2312 local_got_tls_masks[r_symndx] |= tls_type;
2313 local_got_refcounts[r_symndx] += 1;
2317 /* Look through the relocs for a section during the first phase. */
2320 microblaze_elf_check_relocs (bfd * abfd,
2321 struct bfd_link_info * info,
2323 const Elf_Internal_Rela * relocs)
2325 Elf_Internal_Shdr * symtab_hdr;
2326 struct elf_link_hash_entry ** sym_hashes;
2327 struct elf_link_hash_entry ** sym_hashes_end;
2328 const Elf_Internal_Rela * rel;
2329 const Elf_Internal_Rela * rel_end;
2330 struct elf32_mb_link_hash_table *htab;
2331 asection *sreloc = NULL;
2333 if (info->relocatable)
2336 htab = elf32_mb_hash_table (info);
2340 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2341 sym_hashes = elf_sym_hashes (abfd);
2342 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2343 if (!elf_bad_symtab (abfd))
2344 sym_hashes_end -= symtab_hdr->sh_info;
2346 rel_end = relocs + sec->reloc_count;
2348 for (rel = relocs; rel < rel_end; rel++)
2350 unsigned int r_type;
2351 struct elf_link_hash_entry * h;
2352 unsigned long r_symndx;
2353 unsigned char tls_type = 0;
2355 r_symndx = ELF32_R_SYM (rel->r_info);
2356 r_type = ELF32_R_TYPE (rel->r_info);
2358 if (r_symndx < symtab_hdr->sh_info)
2362 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
2364 /* PR15323, ref flags aren't set for references in the same
2366 h->root.non_ir_ref = 1;
2371 /* This relocation describes the C++ object vtable hierarchy.
2372 Reconstruct it for later use during GC. */
2373 case R_MICROBLAZE_GNU_VTINHERIT:
2374 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2378 /* This relocation describes which C++ vtable entries are actually
2379 used. Record for later use during GC. */
2380 case R_MICROBLAZE_GNU_VTENTRY:
2381 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2385 /* This relocation requires .plt entry. */
2386 case R_MICROBLAZE_PLT_64:
2390 h->plt.refcount += 1;
2394 /* This relocation requires .got entry. */
2395 case R_MICROBLAZE_TLSGD:
2396 tls_type |= (TLS_TLS | TLS_GD);
2398 case R_MICROBLAZE_TLSLD:
2399 tls_type |= (TLS_TLS | TLS_LD);
2401 sec->has_tls_reloc = 1;
2402 case R_MICROBLAZE_GOT_64:
2403 if (htab->sgot == NULL)
2405 if (htab->elf.dynobj == NULL)
2406 htab->elf.dynobj = abfd;
2407 if (!create_got_section (htab->elf.dynobj, info))
2412 h->got.refcount += 1;
2413 elf32_mb_hash_entry (h)->tls_mask |= tls_type;
2417 if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) )
2422 case R_MICROBLAZE_64:
2423 case R_MICROBLAZE_64_PCREL:
2424 case R_MICROBLAZE_32:
2426 if (h != NULL && !info->shared)
2428 /* we may need a copy reloc. */
2431 /* we may also need a .plt entry. */
2432 h->plt.refcount += 1;
2433 if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL)
2434 h->pointer_equality_needed = 1;
2438 /* If we are creating a shared library, and this is a reloc
2439 against a global symbol, or a non PC relative reloc
2440 against a local symbol, then we need to copy the reloc
2441 into the shared library. However, if we are linking with
2442 -Bsymbolic, we do not need to copy a reloc against a
2443 global symbol which is defined in an object we are
2444 including in the link (i.e., DEF_REGULAR is set). At
2445 this point we have not seen all the input files, so it is
2446 possible that DEF_REGULAR is not set now but will be set
2447 later (it is never cleared). In case of a weak definition,
2448 DEF_REGULAR may be cleared later by a strong definition in
2449 a shared library. We account for that possibility below by
2450 storing information in the relocs_copied field of the hash
2451 table entry. A similar situation occurs when creating
2452 shared libraries and symbol visibility changes render the
2455 If on the other hand, we are creating an executable, we
2456 may need to keep relocations for symbols satisfied by a
2457 dynamic library if we manage to avoid copy relocs for the
2461 && (sec->flags & SEC_ALLOC) != 0
2462 && (r_type != R_MICROBLAZE_64_PCREL
2464 && (! info->symbolic
2465 || h->root.type == bfd_link_hash_defweak
2466 || !h->def_regular))))
2468 && (sec->flags & SEC_ALLOC) != 0
2470 && (h->root.type == bfd_link_hash_defweak
2471 || !h->def_regular)))
2473 struct elf32_mb_dyn_relocs *p;
2474 struct elf32_mb_dyn_relocs **head;
2476 /* When creating a shared object, we must copy these
2477 relocs into the output file. We create a reloc
2478 section in dynobj and make room for the reloc. */
2484 if (htab->elf.dynobj == NULL)
2485 htab->elf.dynobj = abfd;
2486 dynobj = htab->elf.dynobj;
2488 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj,
2494 /* If this is a global symbol, we count the number of
2495 relocations we need for this symbol. */
2497 head = &((struct elf32_mb_link_hash_entry *) h)->dyn_relocs;
2500 /* Track dynamic relocs needed for local syms too.
2501 We really need local syms available to do this
2505 Elf_Internal_Sym *isym;
2508 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
2513 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2517 vpp = &elf_section_data (s)->local_dynrel;
2518 head = (struct elf32_mb_dyn_relocs **) vpp;
2522 if (p == NULL || p->sec != sec)
2524 bfd_size_type amt = sizeof *p;
2525 p = ((struct elf32_mb_dyn_relocs *)
2526 bfd_alloc (htab->elf.dynobj, amt));
2537 if (r_type == R_MICROBLAZE_64_PCREL)
2549 microblaze_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2551 struct elf32_mb_link_hash_table *htab;
2553 htab = elf32_mb_hash_table (info);
2557 if (!htab->sgot && !create_got_section (dynobj, info))
2560 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2563 htab->splt = bfd_get_linker_section (dynobj, ".plt");
2564 htab->srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
2565 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
2567 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
2569 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2570 || (!info->shared && !htab->srelbss))
2576 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2579 microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info,
2580 struct elf_link_hash_entry *dir,
2581 struct elf_link_hash_entry *ind)
2583 struct elf32_mb_link_hash_entry *edir, *eind;
2585 edir = (struct elf32_mb_link_hash_entry *) dir;
2586 eind = (struct elf32_mb_link_hash_entry *) ind;
2588 if (eind->dyn_relocs != NULL)
2590 if (edir->dyn_relocs != NULL)
2592 struct elf32_mb_dyn_relocs **pp;
2593 struct elf32_mb_dyn_relocs *p;
2595 if (ind->root.type == bfd_link_hash_indirect)
2598 /* Add reloc counts against the weak sym to the strong sym
2599 list. Merge any entries against the same section. */
2600 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2602 struct elf32_mb_dyn_relocs *q;
2604 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2605 if (q->sec == p->sec)
2607 q->pc_count += p->pc_count;
2608 q->count += p->count;
2615 *pp = edir->dyn_relocs;
2618 edir->dyn_relocs = eind->dyn_relocs;
2619 eind->dyn_relocs = NULL;
2622 edir->tls_mask |= eind->tls_mask;
2624 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2628 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2629 struct elf_link_hash_entry *h)
2631 struct elf32_mb_link_hash_table *htab;
2632 struct elf32_mb_link_hash_entry * eh;
2633 struct elf32_mb_dyn_relocs *p;
2634 asection *sdynbss, *s;
2635 unsigned int power_of_two;
2638 htab = elf32_mb_hash_table (info);
2642 /* If this is a function, put it in the procedure linkage table. We
2643 will fill in the contents of the procedure linkage table later,
2644 when we know the address of the .got section. */
2645 if (h->type == STT_FUNC
2648 if (h->plt.refcount <= 0
2649 || SYMBOL_CALLS_LOCAL (info, h)
2650 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2651 && h->root.type == bfd_link_hash_undefweak))
2653 /* This case can occur if we saw a PLT reloc in an input
2654 file, but the symbol was never referred to by a dynamic
2655 object, or if all references were garbage collected. In
2656 such a case, we don't actually need to build a procedure
2657 linkage table, and we can just do a PC32 reloc instead. */
2658 h->plt.offset = (bfd_vma) -1;
2665 /* It's possible that we incorrectly decided a .plt reloc was
2666 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2667 check_relocs. We can't decide accurately between function and
2668 non-function syms in check-relocs; Objects loaded later in
2669 the link may change h->type. So fix it now. */
2670 h->plt.offset = (bfd_vma) -1;
2672 /* If this is a weak symbol, and there is a real definition, the
2673 processor independent code will have arranged for us to see the
2674 real definition first, and we can just use the same value. */
2675 if (h->u.weakdef != NULL)
2677 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2678 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2679 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2680 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2684 /* This is a reference to a symbol defined by a dynamic object which
2685 is not a function. */
2687 /* If we are creating a shared library, we must presume that the
2688 only references to the symbol are via the global offset table.
2689 For such cases we need not do anything here; the relocations will
2690 be handled correctly by relocate_section. */
2694 /* If there are no references to this symbol that do not use the
2695 GOT, we don't need to generate a copy reloc. */
2696 if (!h->non_got_ref)
2699 /* If -z nocopyreloc was given, we won't generate them either. */
2700 if (info->nocopyreloc)
2706 eh = (struct elf32_mb_link_hash_entry *) h;
2707 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2709 s = p->sec->output_section;
2710 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2714 /* If we didn't find any dynamic relocs in read-only sections, then
2715 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2722 /* We must allocate the symbol in our .dynbss section, which will
2723 become part of the .bss section of the executable. There will be
2724 an entry for this symbol in the .dynsym section. The dynamic
2725 object will contain position independent code, so all references
2726 from the dynamic object to this symbol will go through the global
2727 offset table. The dynamic linker will use the .dynsym entry to
2728 determine the address it must put in the global offset table, so
2729 both the dynamic object and the regular object will refer to the
2730 same memory location for the variable. */
2732 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2733 to copy the initial value out of the dynamic object and into the
2734 runtime process image. */
2735 dynobj = elf_hash_table (info)->dynobj;
2736 BFD_ASSERT (dynobj != NULL);
2737 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2739 htab->srelbss->size += sizeof (Elf32_External_Rela);
2743 /* We need to figure out the alignment required for this symbol. I
2744 have no idea how ELF linkers handle this. */
2745 power_of_two = bfd_log2 (h->size);
2746 if (power_of_two > 3)
2749 sdynbss = htab->sdynbss;
2750 /* Apply the required alignment. */
2751 sdynbss->size = BFD_ALIGN (sdynbss->size, (bfd_size_type) (1 << power_of_two));
2752 if (power_of_two > bfd_get_section_alignment (dynobj, sdynbss))
2754 if (! bfd_set_section_alignment (dynobj, sdynbss, power_of_two))
2758 /* Define the symbol as being at this point in the section. */
2759 h->root.u.def.section = sdynbss;
2760 h->root.u.def.value = sdynbss->size;
2762 /* Increment the section size to make room for the symbol. */
2763 sdynbss->size += h->size;
2767 /* Allocate space in .plt, .got and associated reloc sections for
2771 allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat)
2773 struct bfd_link_info *info;
2774 struct elf32_mb_link_hash_table *htab;
2775 struct elf32_mb_link_hash_entry *eh;
2776 struct elf32_mb_dyn_relocs *p;
2778 if (h->root.type == bfd_link_hash_indirect)
2781 info = (struct bfd_link_info *) dat;
2782 htab = elf32_mb_hash_table (info);
2786 if (htab->elf.dynamic_sections_created
2787 && h->plt.refcount > 0)
2789 /* Make sure this symbol is output as a dynamic symbol.
2790 Undefined weak syms won't yet be marked as dynamic. */
2791 if (h->dynindx == -1
2792 && !h->forced_local)
2794 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2798 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
2800 asection *s = htab->splt;
2802 /* The first entry in .plt is reserved. */
2804 s->size = PLT_ENTRY_SIZE;
2806 h->plt.offset = s->size;
2808 /* If this symbol is not defined in a regular file, and we are
2809 not generating a shared library, then set the symbol to this
2810 location in the .plt. This is required to make function
2811 pointers compare as equal between the normal executable and
2812 the shared library. */
2816 h->root.u.def.section = s;
2817 h->root.u.def.value = h->plt.offset;
2820 /* Make room for this entry. */
2821 s->size += PLT_ENTRY_SIZE;
2823 /* We also need to make an entry in the .got.plt section, which
2824 will be placed in the .got section by the linker script. */
2825 htab->sgotplt->size += 4;
2827 /* We also need to make an entry in the .rel.plt section. */
2828 htab->srelplt->size += sizeof (Elf32_External_Rela);
2832 h->plt.offset = (bfd_vma) -1;
2838 h->plt.offset = (bfd_vma) -1;
2842 eh = (struct elf32_mb_link_hash_entry *) h;
2843 if (h->got.refcount > 0)
2848 /* Make sure this symbol is output as a dynamic symbol.
2849 Undefined weak syms won't yet be marked as dynamic. */
2850 if (h->dynindx == -1
2851 && !h->forced_local)
2853 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2858 if ((eh->tls_mask & TLS_TLS) != 0)
2860 /* Handle TLS Symbol */
2861 if ((eh->tls_mask & TLS_LD) != 0)
2863 if (!eh->elf.def_dynamic)
2864 /* We'll just use htab->tlsld_got.offset. This should
2865 always be the case. It's a little odd if we have
2866 a local dynamic reloc against a non-local symbol. */
2867 htab->tlsld_got.refcount += 1;
2871 if ((eh->tls_mask & TLS_GD) != 0)
2876 /* Regular (non-TLS) symbol */
2881 h->got.offset = (bfd_vma) -1;
2886 h->got.offset = s->size;
2888 htab->srelgot->size += need * (sizeof (Elf32_External_Rela) / 4);
2892 h->got.offset = (bfd_vma) -1;
2894 if (eh->dyn_relocs == NULL)
2897 /* In the shared -Bsymbolic case, discard space allocated for
2898 dynamic pc-relative relocs against symbols which turn out to be
2899 defined in regular objects. For the normal shared case, discard
2900 space for pc-relative relocs that have become local due to symbol
2901 visibility changes. */
2909 struct elf32_mb_dyn_relocs **pp;
2911 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2913 p->count -= p->pc_count;
2924 /* For the non-shared case, discard space for relocs against
2925 symbols which turn out to need copy relocs or are not
2931 || (htab->elf.dynamic_sections_created
2932 && (h->root.type == bfd_link_hash_undefweak
2933 || h->root.type == bfd_link_hash_undefined))))
2935 /* Make sure this symbol is output as a dynamic symbol.
2936 Undefined weak syms won't yet be marked as dynamic. */
2937 if (h->dynindx == -1
2938 && !h->forced_local)
2940 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2944 /* If that succeeded, we know we'll be keeping all the
2946 if (h->dynindx != -1)
2950 eh->dyn_relocs = NULL;
2955 /* Finally, allocate space. */
2956 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2958 asection *sreloc = elf_section_data (p->sec)->sreloc;
2959 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2965 /* Set the sizes of the dynamic sections. */
2968 microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2969 struct bfd_link_info *info)
2971 struct elf32_mb_link_hash_table *htab;
2976 htab = elf32_mb_hash_table (info);
2980 dynobj = htab->elf.dynobj;
2981 BFD_ASSERT (dynobj != NULL);
2983 /* Set up .got offsets for local syms, and space for local dynamic
2985 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2987 bfd_signed_vma *local_got;
2988 bfd_signed_vma *end_local_got;
2989 bfd_size_type locsymcount;
2990 Elf_Internal_Shdr *symtab_hdr;
2991 unsigned char *lgot_masks;
2994 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2997 for (s = ibfd->sections; s != NULL; s = s->next)
2999 struct elf32_mb_dyn_relocs *p;
3001 for (p = ((struct elf32_mb_dyn_relocs *)
3002 elf_section_data (s)->local_dynrel);
3006 if (!bfd_is_abs_section (p->sec)
3007 && bfd_is_abs_section (p->sec->output_section))
3009 /* Input section has been discarded, either because
3010 it is a copy of a linkonce section or due to
3011 linker script /DISCARD/, so we'll be discarding
3014 else if (p->count != 0)
3016 srel = elf_section_data (p->sec)->sreloc;
3017 srel->size += p->count * sizeof (Elf32_External_Rela);
3018 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
3019 info->flags |= DF_TEXTREL;
3024 local_got = elf_local_got_refcounts (ibfd);
3028 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3029 locsymcount = symtab_hdr->sh_info;
3030 end_local_got = local_got + locsymcount;
3031 lgot_masks = (unsigned char *) end_local_got;
3033 srel = htab->srelgot;
3035 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3039 unsigned int need = 0;
3040 if ((*lgot_masks & TLS_TLS) != 0)
3042 if ((*lgot_masks & TLS_GD) != 0)
3044 if ((*lgot_masks & TLS_LD) != 0)
3045 htab->tlsld_got.refcount += 1;
3052 *local_got = (bfd_vma) -1;
3056 *local_got = s->size;
3059 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
3063 *local_got = (bfd_vma) -1;
3067 /* Allocate global sym .plt and .got entries, and space for global
3068 sym dynamic relocs. */
3069 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3071 if (htab->tlsld_got.refcount > 0)
3073 htab->tlsld_got.offset = htab->sgot->size;
3074 htab->sgot->size += 8;
3076 htab->srelgot->size += sizeof (Elf32_External_Rela);
3079 htab->tlsld_got.offset = (bfd_vma) -1;
3081 if (elf_hash_table (info)->dynamic_sections_created)
3083 /* Make space for the trailing nop in .plt. */
3084 if (htab->splt->size > 0)
3085 htab->splt->size += 4;
3088 /* The check_relocs and adjust_dynamic_symbol entry points have
3089 determined the sizes of the various dynamic sections. Allocate
3091 for (s = dynobj->sections; s != NULL; s = s->next)
3094 bfd_boolean strip = FALSE;
3096 if ((s->flags & SEC_LINKER_CREATED) == 0)
3099 /* It's OK to base decisions on the section name, because none
3100 of the dynobj section names depend upon the input files. */
3101 name = bfd_get_section_name (dynobj, s);
3103 if (strncmp (name, ".rela", 5) == 0)
3107 /* If we don't need this section, strip it from the
3108 output file. This is to handle .rela.bss and
3109 .rela.plt. We must create it in
3110 create_dynamic_sections, because it must be created
3111 before the linker maps input sections to output
3112 sections. The linker does that before
3113 adjust_dynamic_symbol is called, and it is that
3114 function which decides whether anything needs to go
3115 into these sections. */
3120 /* We use the reloc_count field as a counter if we need
3121 to copy relocs into the output file. */
3125 else if (s != htab->splt && s != htab->sgot && s != htab->sgotplt)
3127 /* It's not one of our sections, so don't allocate space. */
3133 s->flags |= SEC_EXCLUDE;
3137 /* Allocate memory for the section contents. */
3138 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3139 Unused entries should be reclaimed before the section's contents
3140 are written out, but at the moment this does not happen. Thus in
3141 order to prevent writing out garbage, we initialise the section's
3142 contents to zero. */
3143 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3144 if (s->contents == NULL && s->size != 0)
3148 if (elf_hash_table (info)->dynamic_sections_created)
3150 /* Add some entries to the .dynamic section. We fill in the
3151 values later, in microblaze_elf_finish_dynamic_sections, but we
3152 must add the entries now so that we get the correct size for
3153 the .dynamic section. The DT_DEBUG entry is filled in by the
3154 dynamic linker and used by the debugger. */
3155 #define add_dynamic_entry(TAG, VAL) \
3156 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3158 if (info->executable)
3160 if (!add_dynamic_entry (DT_DEBUG, 0))
3164 if (!add_dynamic_entry (DT_RELA, 0)
3165 || !add_dynamic_entry (DT_RELASZ, 0)
3166 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3169 if (htab->splt->size != 0)
3171 if (!add_dynamic_entry (DT_PLTGOT, 0)
3172 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3173 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3174 || !add_dynamic_entry (DT_JMPREL, 0)
3175 || !add_dynamic_entry (DT_BIND_NOW, 1))
3179 if (info->flags & DF_TEXTREL)
3181 if (!add_dynamic_entry (DT_TEXTREL, 0))
3185 #undef add_dynamic_entry
3189 /* Finish up dynamic symbol handling. We set the contents of various
3190 dynamic sections here. */
3193 microblaze_elf_finish_dynamic_symbol (bfd *output_bfd,
3194 struct bfd_link_info *info,
3195 struct elf_link_hash_entry *h,
3196 Elf_Internal_Sym *sym)
3198 struct elf32_mb_link_hash_table *htab;
3199 struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h);
3201 htab = elf32_mb_hash_table (info);
3205 if (h->plt.offset != (bfd_vma) -1)
3210 Elf_Internal_Rela rela;
3216 /* This symbol has an entry in the procedure linkage table. Set
3218 BFD_ASSERT (h->dynindx != -1);
3221 srela = htab->srelplt;
3222 sgotplt = htab->sgotplt;
3223 BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL);
3225 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */
3226 got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */
3227 got_addr = got_offset;
3229 /* For non-PIC objects we need absolute address of the GOT entry. */
3231 got_addr += htab->sgotplt->output_section->vma + sgotplt->output_offset;
3233 /* Fill in the entry in the procedure linkage table. */
3234 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff),
3235 splt->contents + h->plt.offset);
3237 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff),
3238 splt->contents + h->plt.offset + 4);
3240 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff),
3241 splt->contents + h->plt.offset + 4);
3242 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2,
3243 splt->contents + h->plt.offset + 8);
3244 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3,
3245 splt->contents + h->plt.offset + 12);
3247 /* Any additions to the .got section??? */
3248 /* bfd_put_32 (output_bfd,
3249 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3250 sgotplt->contents + got_offset); */
3252 /* Fill in the entry in the .rela.plt section. */
3253 rela.r_offset = (sgotplt->output_section->vma
3254 + sgotplt->output_offset
3256 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT);
3258 loc = srela->contents;
3259 loc += plt_index * sizeof (Elf32_External_Rela);
3260 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3262 if (!h->def_regular)
3264 /* Mark the symbol as undefined, rather than as defined in
3265 the .plt section. Zero the value. */
3266 sym->st_shndx = SHN_UNDEF;
3271 /* h->got.refcount to be checked ? */
3272 if (h->got.offset != (bfd_vma) -1 &&
3273 ! ((h->got.offset & 1) ||
3274 IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask)))
3280 /* This symbol has an entry in the global offset table. Set it
3284 srela = htab->srelgot;
3285 BFD_ASSERT (sgot != NULL && srela != NULL);
3287 offset = (sgot->output_section->vma + sgot->output_offset
3288 + (h->got.offset &~ (bfd_vma) 1));
3290 /* If this is a -Bsymbolic link, and the symbol is defined
3291 locally, we just want to emit a RELATIVE reloc. Likewise if
3292 the symbol was forced to be local because of a version file.
3293 The entry in the global offset table will already have been
3294 initialized in the relocate_section function. */
3296 && (info->symbolic || h->dynindx == -1)
3299 asection *sec = h->root.u.def.section;
3300 microblaze_elf_output_dynamic_relocation (output_bfd,
3301 srela, srela->reloc_count++,
3303 R_MICROBLAZE_REL, offset,
3305 + sec->output_section->vma
3306 + sec->output_offset);
3310 microblaze_elf_output_dynamic_relocation (output_bfd,
3311 srela, srela->reloc_count++,
3313 R_MICROBLAZE_GLOB_DAT,
3317 bfd_put_32 (output_bfd, (bfd_vma) 0,
3318 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
3324 Elf_Internal_Rela rela;
3327 /* This symbols needs a copy reloc. Set it up. */
3329 BFD_ASSERT (h->dynindx != -1);
3331 s = bfd_get_linker_section (htab->elf.dynobj, ".rela.bss");
3332 BFD_ASSERT (s != NULL);
3334 rela.r_offset = (h->root.u.def.value
3335 + h->root.u.def.section->output_section->vma
3336 + h->root.u.def.section->output_offset);
3337 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY);
3339 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3340 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3343 /* Mark some specially defined symbols as absolute. */
3344 if (h == htab->elf.hdynamic
3345 || h == htab->elf.hgot
3346 || h == htab->elf.hplt)
3347 sym->st_shndx = SHN_ABS;
3353 /* Finish up the dynamic sections. */
3356 microblaze_elf_finish_dynamic_sections (bfd *output_bfd,
3357 struct bfd_link_info *info)
3360 asection *sdyn, *sgot;
3361 struct elf32_mb_link_hash_table *htab;
3363 htab = elf32_mb_hash_table (info);
3367 dynobj = htab->elf.dynobj;
3369 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3371 if (htab->elf.dynamic_sections_created)
3374 Elf32_External_Dyn *dyncon, *dynconend;
3376 splt = bfd_get_linker_section (dynobj, ".plt");
3377 BFD_ASSERT (splt != NULL && sdyn != NULL);
3379 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3380 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3381 for (; dyncon < dynconend; dyncon++)
3383 Elf_Internal_Dyn dyn;
3387 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3391 case DT_PLTGOT: name = ".got.plt"; size = FALSE; break;
3392 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
3393 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
3394 case DT_RELA: name = ".rela.dyn"; size = FALSE; break;
3395 case DT_RELASZ: name = ".rela.dyn"; size = TRUE; break;
3396 default: name = NULL; size = FALSE; break;
3403 s = bfd_get_section_by_name (output_bfd, name);
3409 dyn.d_un.d_ptr = s->vma;
3411 dyn.d_un.d_val = s->size;
3413 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3417 /* Clear the first entry in the procedure linkage table,
3418 and put a nop in the last four bytes. */
3421 memset (splt->contents, 0, PLT_ENTRY_SIZE);
3422 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */,
3423 splt->contents + splt->size - 4);
3426 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3429 /* Set the first entry in the global offset table to the address of
3430 the dynamic section. */
3431 sgot = bfd_get_linker_section (dynobj, ".got.plt");
3432 if (sgot && sgot->size > 0)
3435 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3437 bfd_put_32 (output_bfd,
3438 sdyn->output_section->vma + sdyn->output_offset,
3440 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3443 if (htab->sgot && htab->sgot->size > 0)
3444 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3449 /* Hook called by the linker routine which adds symbols from an object
3450 file. We use it to put .comm items in .sbss, and not .bss. */
3453 microblaze_elf_add_symbol_hook (bfd *abfd,
3454 struct bfd_link_info *info,
3455 Elf_Internal_Sym *sym,
3456 const char **namep ATTRIBUTE_UNUSED,
3457 flagword *flagsp ATTRIBUTE_UNUSED,
3461 if (sym->st_shndx == SHN_COMMON
3462 && !info->relocatable
3463 && sym->st_size <= elf_gp_size (abfd))
3465 /* Common symbols less than or equal to -G nn bytes are automatically
3467 *secp = bfd_make_section_old_way (abfd, ".sbss");
3469 || ! bfd_set_section_flags (abfd, *secp, SEC_IS_COMMON))
3472 *valp = sym->st_size;
3478 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec
3479 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3481 #define TARGET_BIG_SYM microblaze_elf32_vec
3482 #define TARGET_BIG_NAME "elf32-microblaze"
3484 #define ELF_ARCH bfd_arch_microblaze
3485 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3486 #define ELF_MACHINE_CODE EM_MICROBLAZE
3487 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3488 #define ELF_MAXPAGESIZE 0x1000
3489 #define elf_info_to_howto microblaze_elf_info_to_howto
3490 #define elf_info_to_howto_rel NULL
3492 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3493 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3494 #define elf_backend_relocate_section microblaze_elf_relocate_section
3495 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3496 #define bfd_elf32_bfd_merge_private_bfd_data microblaze_elf_merge_private_bfd_data
3497 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3499 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3500 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3501 #define elf_backend_check_relocs microblaze_elf_check_relocs
3502 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3503 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3504 #define elf_backend_can_gc_sections 1
3505 #define elf_backend_can_refcount 1
3506 #define elf_backend_want_got_plt 1
3507 #define elf_backend_plt_readonly 1
3508 #define elf_backend_got_header_size 12
3509 #define elf_backend_rela_normal 1
3511 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3512 #define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections
3513 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3514 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3515 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3516 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3518 #include "elf32-target.h"