1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
3 Copyright (C) 2009-2016 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 3, /* Size (0 = byte, 1 = short, 2 = long). */
49 FALSE, /* PC_relative. */
51 complain_overflow_dont, /* 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 3, /* Size (0 = byte, 1 = short, 2 = long). */
184 TRUE, /* PC_relative. */
186 complain_overflow_dont, /* 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 (_("%B: 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 (bfd_link_relocatable (info))
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);
1086 (_("%s: The target (%s) of an %s relocation "
1087 "is in the wrong section (%s)"),
1088 bfd_get_filename (input_bfd),
1090 microblaze_elf_howto_table[(int) r_type]->name,
1091 bfd_get_section_name (sec->owner, sec));
1092 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1100 case (int) R_MICROBLAZE_SRW32 :
1104 /* Only relocate if the symbol is defined. */
1107 name = bfd_get_section_name (sec->owner, sec);
1109 if (strcmp (name, ".sdata") == 0
1110 || strcmp (name, ".sbss") == 0)
1112 if (rw_small_data_pointer == 0)
1113 microblaze_elf_final_sdp (info);
1114 if (rw_small_data_pointer == 0)
1117 r = bfd_reloc_undefined;
1121 /* At this point `relocation' contains the object's
1123 relocation -= rw_small_data_pointer;
1124 /* Now it contains the offset from _SDA_BASE_. */
1125 r = _bfd_final_link_relocate (howto, input_bfd,
1128 relocation, addend);
1133 (_("%s: The target (%s) of an %s relocation "
1134 "is in the wrong section (%s)"),
1135 bfd_get_filename (input_bfd),
1137 microblaze_elf_howto_table[(int) r_type]->name,
1138 bfd_get_section_name (sec->owner, sec));
1139 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1147 case (int) R_MICROBLAZE_32_SYM_OP_SYM:
1148 break; /* Do nothing. */
1150 case (int) R_MICROBLAZE_GOTPC_64:
1151 relocation = htab->sgotplt->output_section->vma
1152 + htab->sgotplt->output_offset;
1153 relocation -= (input_section->output_section->vma
1154 + input_section->output_offset
1155 + offset + INST_WORD_SIZE);
1156 relocation += addend;
1157 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1158 contents + offset + endian);
1159 bfd_put_16 (input_bfd, relocation & 0xffff,
1160 contents + offset + endian + INST_WORD_SIZE);
1163 case (int) R_MICROBLAZE_PLT_64:
1166 if (htab->splt != NULL && h != NULL
1167 && h->plt.offset != (bfd_vma) -1)
1169 relocation = (htab->splt->output_section->vma
1170 + htab->splt->output_offset
1172 unresolved_reloc = FALSE;
1173 immediate = relocation - (input_section->output_section->vma
1174 + input_section->output_offset
1175 + offset + INST_WORD_SIZE);
1176 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1177 contents + offset + endian);
1178 bfd_put_16 (input_bfd, immediate & 0xffff,
1179 contents + offset + endian + INST_WORD_SIZE);
1183 relocation -= (input_section->output_section->vma
1184 + input_section->output_offset
1185 + offset + INST_WORD_SIZE);
1186 immediate = relocation;
1187 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
1188 contents + offset + endian);
1189 bfd_put_16 (input_bfd, immediate & 0xffff,
1190 contents + offset + endian + INST_WORD_SIZE);
1195 case (int) R_MICROBLAZE_TLSGD:
1196 tls_type = (TLS_TLS | TLS_GD);
1198 case (int) R_MICROBLAZE_TLSLD:
1199 tls_type = (TLS_TLS | TLS_LD);
1201 case (int) R_MICROBLAZE_GOT_64:
1206 bfd_vma static_value;
1208 bfd_boolean need_relocs = FALSE;
1209 if (htab->sgot == NULL)
1215 /* 1. Identify GOT Offset;
1216 2. Compute Static Values
1217 3. Process Module Id, Process Offset
1218 4. Fixup Relocation with GOT offset value. */
1220 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1221 if (IS_TLS_LD (tls_type))
1222 offp = &htab->tlsld_got.offset;
1225 if (htab->sgotplt != NULL && h->got.offset != (bfd_vma) -1)
1226 offp = &h->got.offset;
1232 if (local_got_offsets == NULL)
1234 offp = &local_got_offsets[r_symndx];
1243 if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type))
1246 /* Symbol index to use for relocs */
1250 elf_hash_table (info)->dynamic_sections_created;
1252 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1253 bfd_link_pic (info),
1255 && (!bfd_link_pic (info)
1256 || !SYMBOL_REFERENCES_LOCAL (info, h)))
1260 /* Need to generate relocs ? */
1261 if ((bfd_link_pic (info) || indx != 0)
1263 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1264 || h->root.type != bfd_link_hash_undefweak))
1267 /* 2. Compute/Emit Static value of r-expression */
1268 static_value = relocation + addend;
1270 /* 3. Process module-id and offset */
1271 if (! ((*offp) & 1) )
1275 got_offset = (htab->sgot->output_section->vma
1276 + htab->sgot->output_offset
1279 /* Process module-id */
1280 if (IS_TLS_LD(tls_type))
1282 if (! bfd_link_pic (info))
1284 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off);
1288 microblaze_elf_output_dynamic_relocation (output_bfd,
1289 htab->srelgot, htab->srelgot->reloc_count++,
1290 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32,
1294 else if (IS_TLS_GD(tls_type))
1298 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off);
1302 microblaze_elf_output_dynamic_relocation (output_bfd,
1304 htab->srelgot->reloc_count++,
1305 /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32,
1306 got_offset, indx ? 0 : static_value);
1310 /* Process Offset */
1311 if (htab->srelgot == NULL)
1314 got_offset = (htab->sgot->output_section->vma
1315 + htab->sgot->output_offset
1317 if (IS_TLS_LD(tls_type))
1319 /* For LD, offset should be 0 */
1321 bfd_put_32 (output_bfd, 0, htab->sgot->contents + off2);
1323 else if (IS_TLS_GD(tls_type))
1326 static_value -= dtprel_base(info);
1329 microblaze_elf_output_dynamic_relocation (output_bfd,
1330 htab->srelgot, htab->srelgot->reloc_count++,
1331 /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32,
1332 got_offset, indx ? 0 : static_value);
1336 bfd_put_32 (output_bfd, static_value,
1337 htab->sgot->contents + off2);
1342 bfd_put_32 (output_bfd, static_value,
1343 htab->sgot->contents + off2);
1345 /* Relocs for dyn symbols generated by
1346 finish_dynamic_symbols */
1347 if (bfd_link_pic (info) && h == NULL)
1350 microblaze_elf_output_dynamic_relocation (output_bfd,
1351 htab->srelgot, htab->srelgot->reloc_count++,
1352 /* symindex= */ indx, R_MICROBLAZE_REL,
1353 got_offset, static_value);
1358 /* 4. Fixup Relocation with GOT offset value
1359 Compute relative address of GOT entry for applying
1360 the current relocation */
1361 relocation = htab->sgot->output_section->vma
1362 + htab->sgot->output_offset
1364 - htab->sgotplt->output_section->vma
1365 - htab->sgotplt->output_offset;
1367 /* Apply Current Relocation */
1368 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1369 contents + offset + endian);
1370 bfd_put_16 (input_bfd, relocation & 0xffff,
1371 contents + offset + endian + INST_WORD_SIZE);
1373 unresolved_reloc = FALSE;
1377 case (int) R_MICROBLAZE_GOTOFF_64:
1380 unsigned short lo, high;
1381 relocation += addend;
1382 relocation -= htab->sgotplt->output_section->vma
1383 + htab->sgotplt->output_offset;
1384 /* Write this value into correct location. */
1385 immediate = relocation;
1386 lo = immediate & 0x0000ffff;
1387 high = (immediate >> 16) & 0x0000ffff;
1388 bfd_put_16 (input_bfd, high, contents + offset + endian);
1389 bfd_put_16 (input_bfd, lo, contents + offset + INST_WORD_SIZE + endian);
1393 case (int) R_MICROBLAZE_GOTOFF_32:
1395 relocation += addend;
1396 relocation -= htab->sgotplt->output_section->vma
1397 + htab->sgotplt->output_offset;
1398 /* Write this value into correct location. */
1399 bfd_put_32 (input_bfd, relocation, contents + offset);
1403 case (int) R_MICROBLAZE_TLSDTPREL64:
1404 relocation += addend;
1405 relocation -= dtprel_base(info);
1406 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1407 contents + offset + 2);
1408 bfd_put_16 (input_bfd, relocation & 0xffff,
1409 contents + offset + 2 + INST_WORD_SIZE);
1411 case (int) R_MICROBLAZE_64_PCREL :
1412 case (int) R_MICROBLAZE_64:
1413 case (int) R_MICROBLAZE_32:
1415 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1416 from removed linkonce sections, or sections discarded by
1418 if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0)
1420 relocation += addend;
1421 if (r_type == R_MICROBLAZE_32)
1422 bfd_put_32 (input_bfd, relocation, contents + offset);
1425 if (r_type == R_MICROBLAZE_64_PCREL)
1426 relocation -= (input_section->output_section->vma
1427 + input_section->output_offset
1428 + offset + INST_WORD_SIZE);
1429 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1430 contents + offset + endian);
1431 bfd_put_16 (input_bfd, relocation & 0xffff,
1432 contents + offset + endian + INST_WORD_SIZE);
1437 if ((bfd_link_pic (info)
1439 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1440 || h->root.type != bfd_link_hash_undefweak)
1441 && (!howto->pc_relative
1445 || !h->def_regular))))
1446 || (!bfd_link_pic (info)
1452 || h->root.type == bfd_link_hash_undefweak
1453 || h->root.type == bfd_link_hash_undefined)))
1455 Elf_Internal_Rela outrel;
1459 /* When generating a shared object, these relocations
1460 are copied into the output file to be resolved at run
1463 BFD_ASSERT (sreloc != NULL);
1468 _bfd_elf_section_offset (output_bfd, info, input_section,
1470 if (outrel.r_offset == (bfd_vma) -1)
1472 else if (outrel.r_offset == (bfd_vma) -2)
1474 outrel.r_offset += (input_section->output_section->vma
1475 + input_section->output_offset);
1478 memset (&outrel, 0, sizeof outrel);
1479 /* h->dynindx may be -1 if the symbol was marked to
1482 && ((! info->symbolic && h->dynindx != -1)
1483 || !h->def_regular))
1485 BFD_ASSERT (h->dynindx != -1);
1486 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1487 outrel.r_addend = addend;
1491 if (r_type == R_MICROBLAZE_32)
1493 outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
1494 outrel.r_addend = relocation + addend;
1500 (_("%B: probably compiled without -fPIC?"),
1502 bfd_set_error (bfd_error_bad_value);
1507 loc = sreloc->contents;
1508 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1509 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1514 relocation += addend;
1515 if (r_type == R_MICROBLAZE_32)
1516 bfd_put_32 (input_bfd, relocation, contents + offset);
1519 if (r_type == R_MICROBLAZE_64_PCREL)
1520 relocation -= (input_section->output_section->vma
1521 + input_section->output_offset
1522 + offset + INST_WORD_SIZE);
1523 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1524 contents + offset + endian);
1525 bfd_put_16 (input_bfd, relocation & 0xffff,
1526 contents + offset + endian + INST_WORD_SIZE);
1533 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1535 relocation, addend);
1542 if (r != bfd_reloc_ok)
1544 /* FIXME: This should be generic enough to go in a utility. */
1548 name = h->root.root.string;
1551 name = (bfd_elf_string_from_elf_section
1552 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1553 if (name == NULL || *name == '\0')
1554 name = bfd_section_name (input_bfd, sec);
1562 case bfd_reloc_overflow:
1563 (*info->callbacks->reloc_overflow)
1564 (info, (h ? &h->root : NULL), name, howto->name,
1565 (bfd_vma) 0, input_bfd, input_section, offset);
1568 case bfd_reloc_undefined:
1569 (*info->callbacks->undefined_symbol)
1570 (info, name, input_bfd, input_section, offset, TRUE);
1573 case bfd_reloc_outofrange:
1574 errmsg = _("internal error: out of range error");
1577 case bfd_reloc_notsupported:
1578 errmsg = _("internal error: unsupported relocation error");
1581 case bfd_reloc_dangerous:
1582 errmsg = _("internal error: dangerous error");
1586 errmsg = _("internal error: unknown error");
1589 (*info->callbacks->warning) (info, errmsg, name, input_bfd,
1590 input_section, offset);
1599 /* Merge backend specific data from an object file to the output
1600 object file when linking.
1602 Note: We only use this hook to catch endian mismatches. */
1604 microblaze_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
1606 /* Check if we have the same endianess. */
1607 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
1614 /* Calculate fixup value for reference. */
1617 calc_fixup (bfd_vma start, bfd_vma size, asection *sec)
1619 bfd_vma end = start + size;
1622 if (sec == NULL || sec->relax == NULL)
1625 /* Look for addr in relax table, total fixup value. */
1626 for (i = 0; i < sec->relax_count; i++)
1628 if (end <= sec->relax[i].addr)
1630 if ((end != start) && (start > sec->relax[i].addr))
1632 fixup += sec->relax[i].size;
1637 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1638 a 32-bit instruction. */
1640 microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1642 unsigned long instr = bfd_get_32 (abfd, bfd_addr);
1643 instr &= ~0x0000ffff;
1644 instr |= (val & 0x0000ffff);
1645 bfd_put_32 (abfd, instr, bfd_addr);
1648 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1649 two consecutive 32-bit instructions. */
1651 microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1653 unsigned long instr_hi;
1654 unsigned long instr_lo;
1656 instr_hi = bfd_get_32 (abfd, bfd_addr);
1657 instr_hi &= ~0x0000ffff;
1658 instr_hi |= ((val >> 16) & 0x0000ffff);
1659 bfd_put_32 (abfd, instr_hi, bfd_addr);
1661 instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE);
1662 instr_lo &= ~0x0000ffff;
1663 instr_lo |= (val & 0x0000ffff);
1664 bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE);
1668 microblaze_elf_relax_section (bfd *abfd,
1670 struct bfd_link_info *link_info,
1673 Elf_Internal_Shdr *symtab_hdr;
1674 Elf_Internal_Rela *internal_relocs;
1675 Elf_Internal_Rela *free_relocs = NULL;
1676 Elf_Internal_Rela *irel, *irelend;
1677 bfd_byte *contents = NULL;
1678 bfd_byte *free_contents = NULL;
1683 struct elf_link_hash_entry *sym_hash;
1684 Elf_Internal_Sym *isymbuf, *isymend;
1685 Elf_Internal_Sym *isym;
1690 /* We only do this once per section. We may be able to delete some code
1691 by running multiple passes, but it is not worth it. */
1694 /* Only do this for a text section. */
1695 if (bfd_link_relocatable (link_info)
1696 || (sec->flags & SEC_RELOC) == 0
1697 || (sec->reloc_count == 0)
1698 || (sec->flags & SEC_CODE) == 0)
1701 BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0));
1703 /* If this is the first time we have been called for this section,
1704 initialize the cooked size. */
1706 sec->size = sec->rawsize;
1708 /* Get symbols for this section. */
1709 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1710 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1711 symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
1712 if (isymbuf == NULL)
1713 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount,
1714 0, NULL, NULL, NULL);
1715 BFD_ASSERT (isymbuf != NULL);
1717 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
1718 if (internal_relocs == NULL)
1720 if (! link_info->keep_memory)
1721 free_relocs = internal_relocs;
1723 sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1)
1724 * sizeof (struct relax_table));
1725 if (sec->relax == NULL)
1727 sec->relax_count = 0;
1729 irelend = internal_relocs + sec->reloc_count;
1731 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1734 if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL)
1735 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64 ))
1736 continue; /* Can't delete this reloc. */
1738 /* Get the section contents. */
1739 if (contents == NULL)
1741 if (elf_section_data (sec)->this_hdr.contents != NULL)
1742 contents = elf_section_data (sec)->this_hdr.contents;
1745 contents = (bfd_byte *) bfd_malloc (sec->size);
1746 if (contents == NULL)
1748 free_contents = contents;
1750 if (!bfd_get_section_contents (abfd, sec, contents,
1751 (file_ptr) 0, sec->size))
1753 elf_section_data (sec)->this_hdr.contents = contents;
1757 /* Get the value of the symbol referred to by the reloc. */
1758 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1760 /* A local symbol. */
1763 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1764 if (isym->st_shndx == SHN_UNDEF)
1765 sym_sec = bfd_und_section_ptr;
1766 else if (isym->st_shndx == SHN_ABS)
1767 sym_sec = bfd_abs_section_ptr;
1768 else if (isym->st_shndx == SHN_COMMON)
1769 sym_sec = bfd_com_section_ptr;
1771 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1773 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
1778 struct elf_link_hash_entry *h;
1780 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1781 h = elf_sym_hashes (abfd)[indx];
1782 BFD_ASSERT (h != NULL);
1784 if (h->root.type != bfd_link_hash_defined
1785 && h->root.type != bfd_link_hash_defweak)
1786 /* This appears to be a reference to an undefined
1787 symbol. Just ignore it--it will be caught by the
1788 regular reloc processing. */
1791 symval = (h->root.u.def.value
1792 + h->root.u.def.section->output_section->vma
1793 + h->root.u.def.section->output_offset);
1796 /* If this is a PC-relative reloc, subtract the instr offset from
1797 the symbol value. */
1798 if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL)
1800 symval = symval + irel->r_addend
1802 + sec->output_section->vma
1803 + sec->output_offset);
1806 symval += irel->r_addend;
1808 if ((symval & 0xffff8000) == 0
1809 || (symval & 0xffff8000) == 0xffff8000)
1811 /* We can delete this instruction. */
1812 sec->relax[sec->relax_count].addr = irel->r_offset;
1813 sec->relax[sec->relax_count].size = INST_WORD_SIZE;
1816 /* Rewrite relocation type. */
1817 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1819 case R_MICROBLAZE_64_PCREL:
1820 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1821 (int) R_MICROBLAZE_32_PCREL_LO);
1823 case R_MICROBLAZE_64:
1824 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1825 (int) R_MICROBLAZE_32_LO);
1828 /* Cannot happen. */
1832 } /* Loop through all relocations. */
1834 /* Loop through the relocs again, and see if anything needs to change. */
1835 if (sec->relax_count > 0)
1837 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1839 sec->relax[sec->relax_count].addr = sec->size;
1841 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1845 /* Get the new reloc address. */
1846 nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec);
1847 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1851 case R_MICROBLAZE_64_PCREL:
1853 case R_MICROBLAZE_64:
1854 case R_MICROBLAZE_32_LO:
1855 /* If this reloc is against a symbol defined in this
1856 section, we must check the addend to see it will put the value in
1857 range to be adjusted, and hence must be changed. */
1858 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1860 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1861 /* Only handle relocs against .text. */
1862 if (isym->st_shndx == shndx
1863 && ELF32_ST_TYPE (isym->st_info) == STT_SECTION)
1864 irel->r_addend -= calc_fixup (irel->r_addend, 0, sec);
1867 case R_MICROBLAZE_NONE:
1869 /* This was a PC-relative instruction that was
1870 completely resolved. */
1872 bfd_vma target_address;
1873 target_address = irel->r_addend + irel->r_offset;
1874 sfix = calc_fixup (irel->r_offset, 0, sec);
1875 efix = calc_fixup (target_address, 0, sec);
1876 irel->r_addend -= (efix - sfix);
1877 /* Should use HOWTO. */
1878 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset,
1882 case R_MICROBLAZE_64_NONE:
1884 /* This was a PC-relative 64-bit instruction that was
1885 completely resolved. */
1887 bfd_vma target_address;
1888 target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE;
1889 sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec);
1890 efix = calc_fixup (target_address, 0, sec);
1891 irel->r_addend -= (efix - sfix);
1892 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset
1893 + INST_WORD_SIZE, irel->r_addend);
1897 irel->r_offset = nraddr;
1898 } /* Change all relocs in this section. */
1900 /* Look through all other sections. */
1901 for (o = abfd->sections; o != NULL; o = o->next)
1903 Elf_Internal_Rela *irelocs;
1904 Elf_Internal_Rela *irelscan, *irelscanend;
1905 bfd_byte *ocontents;
1908 || (o->flags & SEC_RELOC) == 0
1909 || o->reloc_count == 0)
1912 /* We always cache the relocs. Perhaps, if info->keep_memory is
1913 FALSE, we should free them, if we are permitted to. */
1915 irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE);
1916 if (irelocs == NULL)
1920 irelscanend = irelocs + o->reloc_count;
1921 for (irelscan = irelocs; irelscan < irelscanend; irelscan++)
1923 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32)
1925 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1927 /* Look at the reloc only if the value has been resolved. */
1928 if (isym->st_shndx == shndx
1929 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1931 if (ocontents == NULL)
1933 if (elf_section_data (o)->this_hdr.contents != NULL)
1934 ocontents = elf_section_data (o)->this_hdr.contents;
1937 /* We always cache the section contents.
1938 Perhaps, if info->keep_memory is FALSE, we
1939 should free them, if we are permitted to. */
1940 if (o->rawsize == 0)
1941 o->rawsize = o->size;
1942 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1943 if (ocontents == NULL)
1945 if (!bfd_get_section_contents (abfd, o, ocontents,
1949 elf_section_data (o)->this_hdr.contents = ocontents;
1953 irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec);
1955 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM)
1957 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1959 /* Look at the reloc only if the value has been resolved. */
1960 if (ocontents == NULL)
1962 if (elf_section_data (o)->this_hdr.contents != NULL)
1963 ocontents = elf_section_data (o)->this_hdr.contents;
1966 /* We always cache the section contents.
1967 Perhaps, if info->keep_memory is FALSE, we
1968 should free them, if we are permitted to. */
1970 if (o->rawsize == 0)
1971 o->rawsize = o->size;
1972 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1973 if (ocontents == NULL)
1975 if (!bfd_get_section_contents (abfd, o, ocontents,
1979 elf_section_data (o)->this_hdr.contents = ocontents;
1982 irelscan->r_addend -= calc_fixup (irel->r_addend
1988 else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO)
1989 || (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_LO))
1991 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1993 /* Look at the reloc only if the value has been resolved. */
1994 if (isym->st_shndx == shndx
1995 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1998 bfd_vma target_address;
2000 if (ocontents == NULL)
2002 if (elf_section_data (o)->this_hdr.contents != NULL)
2003 ocontents = elf_section_data (o)->this_hdr.contents;
2006 /* We always cache the section contents.
2007 Perhaps, if info->keep_memory is FALSE, we
2008 should free them, if we are permitted to. */
2009 if (o->rawsize == 0)
2010 o->rawsize = o->size;
2011 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2012 if (ocontents == NULL)
2014 if (!bfd_get_section_contents (abfd, o, ocontents,
2018 elf_section_data (o)->this_hdr.contents = ocontents;
2022 unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
2023 immediate = instr & 0x0000ffff;
2024 target_address = immediate;
2025 offset = calc_fixup (target_address, 0, sec);
2026 immediate -= offset;
2027 irelscan->r_addend -= offset;
2028 microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset,
2029 irelscan->r_addend);
2033 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64)
2035 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2037 /* Look at the reloc only if the value has been resolved. */
2038 if (isym->st_shndx == shndx
2039 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2043 if (ocontents == NULL)
2045 if (elf_section_data (o)->this_hdr.contents != NULL)
2046 ocontents = elf_section_data (o)->this_hdr.contents;
2049 /* We always cache the section contents.
2050 Perhaps, if info->keep_memory is FALSE, we
2051 should free them, if we are permitted to. */
2053 if (o->rawsize == 0)
2054 o->rawsize = o->size;
2055 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2056 if (ocontents == NULL)
2058 if (!bfd_get_section_contents (abfd, o, ocontents,
2062 elf_section_data (o)->this_hdr.contents = ocontents;
2065 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2066 + irelscan->r_offset);
2067 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2068 + irelscan->r_offset
2070 immediate = (instr_hi & 0x0000ffff) << 16;
2071 immediate |= (instr_lo & 0x0000ffff);
2072 offset = calc_fixup (irelscan->r_addend, 0, sec);
2073 immediate -= offset;
2074 irelscan->r_addend -= offset;
2077 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL)
2079 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2081 /* Look at the reloc only if the value has been resolved. */
2082 if (isym->st_shndx == shndx
2083 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2086 bfd_vma target_address;
2088 if (ocontents == NULL)
2090 if (elf_section_data (o)->this_hdr.contents != NULL)
2091 ocontents = elf_section_data (o)->this_hdr.contents;
2094 /* We always cache the section contents.
2095 Perhaps, if info->keep_memory is FALSE, we
2096 should free them, if we are permitted to. */
2097 if (o->rawsize == 0)
2098 o->rawsize = o->size;
2099 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2100 if (ocontents == NULL)
2102 if (!bfd_get_section_contents (abfd, o, ocontents,
2106 elf_section_data (o)->this_hdr.contents = ocontents;
2109 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2110 + irelscan->r_offset);
2111 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2112 + irelscan->r_offset
2114 immediate = (instr_hi & 0x0000ffff) << 16;
2115 immediate |= (instr_lo & 0x0000ffff);
2116 target_address = immediate;
2117 offset = calc_fixup (target_address, 0, sec);
2118 immediate -= offset;
2119 irelscan->r_addend -= offset;
2120 microblaze_bfd_write_imm_value_64 (abfd, ocontents
2121 + irelscan->r_offset, immediate);
2127 /* Adjust the local symbols defined in this section. */
2128 isymend = isymbuf + symtab_hdr->sh_info;
2129 for (isym = isymbuf; isym < isymend; isym++)
2131 if (isym->st_shndx == shndx)
2133 isym->st_value -= calc_fixup (isym->st_value, 0, sec);
2135 isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec);
2139 /* Now adjust the global symbols defined in this section. */
2140 isym = isymbuf + symtab_hdr->sh_info;
2141 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info;
2142 for (sym_index = 0; sym_index < symcount; sym_index++)
2144 sym_hash = elf_sym_hashes (abfd)[sym_index];
2145 if ((sym_hash->root.type == bfd_link_hash_defined
2146 || sym_hash->root.type == bfd_link_hash_defweak)
2147 && sym_hash->root.u.def.section == sec)
2149 sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value,
2152 sym_hash->size -= calc_fixup (sym_hash->root.u.def.value,
2153 sym_hash->size, sec);
2157 /* Physically move the code and change the cooked size. */
2158 dest = sec->relax[0].addr;
2159 for (i = 0; i < sec->relax_count; i++)
2162 src = sec->relax[i].addr + sec->relax[i].size;
2163 len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size;
2165 memmove (contents + dest, contents + src, len);
2166 sec->size -= sec->relax[i].size;
2170 elf_section_data (sec)->relocs = internal_relocs;
2173 elf_section_data (sec)->this_hdr.contents = contents;
2174 free_contents = NULL;
2176 symtab_hdr->contents = (bfd_byte *) isymbuf;
2179 if (free_relocs != NULL)
2185 if (free_contents != NULL)
2187 if (!link_info->keep_memory)
2188 free (free_contents);
2190 /* Cache the section contents for elf_link_input_bfd. */
2191 elf_section_data (sec)->this_hdr.contents = contents;
2192 free_contents = NULL;
2195 if (sec->relax_count == 0)
2206 if (free_relocs != NULL)
2208 if (free_contents != NULL)
2209 free (free_contents);
2210 if (sec->relax != NULL)
2214 sec->relax_count = 0;
2219 /* Return the section that should be marked against GC for a given
2223 microblaze_elf_gc_mark_hook (asection *sec,
2224 struct bfd_link_info * info,
2225 Elf_Internal_Rela * rel,
2226 struct elf_link_hash_entry * h,
2227 Elf_Internal_Sym * sym)
2230 switch (ELF32_R_TYPE (rel->r_info))
2232 case R_MICROBLAZE_GNU_VTINHERIT:
2233 case R_MICROBLAZE_GNU_VTENTRY:
2237 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2240 /* Update the got entry reference counts for the section being removed. */
2243 microblaze_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
2244 struct bfd_link_info * info ATTRIBUTE_UNUSED,
2245 asection * sec ATTRIBUTE_UNUSED,
2246 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
2253 #define PLT_ENTRY_SIZE 16
2255 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2256 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2257 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2258 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2259 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2261 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
2262 shortcuts to them in our hash table. */
2265 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2267 struct elf32_mb_link_hash_table *htab;
2269 if (! _bfd_elf_create_got_section (dynobj, info))
2271 htab = elf32_mb_hash_table (info);
2275 htab->sgot = bfd_get_linker_section (dynobj, ".got");
2276 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2277 if (!htab->sgot || !htab->sgotplt)
2280 if ((htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got")) == NULL)
2281 htab->srelgot = bfd_make_section_anyway (dynobj, ".rela.got");
2282 if (htab->srelgot == NULL
2283 || ! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC
2287 | SEC_LINKER_CREATED
2289 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2295 update_local_sym_info (bfd *abfd,
2296 Elf_Internal_Shdr *symtab_hdr,
2297 unsigned long r_symndx,
2298 unsigned int tls_type)
2300 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2301 unsigned char *local_got_tls_masks;
2303 if (local_got_refcounts == NULL)
2305 bfd_size_type size = symtab_hdr->sh_info;
2307 size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks));
2308 local_got_refcounts = bfd_zalloc (abfd, size);
2309 if (local_got_refcounts == NULL)
2311 elf_local_got_refcounts (abfd) = local_got_refcounts;
2314 local_got_tls_masks =
2315 (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info);
2316 local_got_tls_masks[r_symndx] |= tls_type;
2317 local_got_refcounts[r_symndx] += 1;
2321 /* Look through the relocs for a section during the first phase. */
2324 microblaze_elf_check_relocs (bfd * abfd,
2325 struct bfd_link_info * info,
2327 const Elf_Internal_Rela * relocs)
2329 Elf_Internal_Shdr * symtab_hdr;
2330 struct elf_link_hash_entry ** sym_hashes;
2331 struct elf_link_hash_entry ** sym_hashes_end;
2332 const Elf_Internal_Rela * rel;
2333 const Elf_Internal_Rela * rel_end;
2334 struct elf32_mb_link_hash_table *htab;
2335 asection *sreloc = NULL;
2337 if (bfd_link_relocatable (info))
2340 htab = elf32_mb_hash_table (info);
2344 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2345 sym_hashes = elf_sym_hashes (abfd);
2346 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2347 if (!elf_bad_symtab (abfd))
2348 sym_hashes_end -= symtab_hdr->sh_info;
2350 rel_end = relocs + sec->reloc_count;
2352 for (rel = relocs; rel < rel_end; rel++)
2354 unsigned int r_type;
2355 struct elf_link_hash_entry * h;
2356 unsigned long r_symndx;
2357 unsigned char tls_type = 0;
2359 r_symndx = ELF32_R_SYM (rel->r_info);
2360 r_type = ELF32_R_TYPE (rel->r_info);
2362 if (r_symndx < symtab_hdr->sh_info)
2366 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
2368 /* PR15323, ref flags aren't set for references in the same
2370 h->root.non_ir_ref = 1;
2375 /* This relocation describes the C++ object vtable hierarchy.
2376 Reconstruct it for later use during GC. */
2377 case R_MICROBLAZE_GNU_VTINHERIT:
2378 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2382 /* This relocation describes which C++ vtable entries are actually
2383 used. Record for later use during GC. */
2384 case R_MICROBLAZE_GNU_VTENTRY:
2385 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2389 /* This relocation requires .plt entry. */
2390 case R_MICROBLAZE_PLT_64:
2394 h->plt.refcount += 1;
2398 /* This relocation requires .got entry. */
2399 case R_MICROBLAZE_TLSGD:
2400 tls_type |= (TLS_TLS | TLS_GD);
2402 case R_MICROBLAZE_TLSLD:
2403 tls_type |= (TLS_TLS | TLS_LD);
2405 sec->has_tls_reloc = 1;
2406 case R_MICROBLAZE_GOT_64:
2407 if (htab->sgot == NULL)
2409 if (htab->elf.dynobj == NULL)
2410 htab->elf.dynobj = abfd;
2411 if (!create_got_section (htab->elf.dynobj, info))
2416 h->got.refcount += 1;
2417 elf32_mb_hash_entry (h)->tls_mask |= tls_type;
2421 if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) )
2426 case R_MICROBLAZE_64:
2427 case R_MICROBLAZE_64_PCREL:
2428 case R_MICROBLAZE_32:
2430 if (h != NULL && !bfd_link_pic (info))
2432 /* we may need a copy reloc. */
2435 /* we may also need a .plt entry. */
2436 h->plt.refcount += 1;
2437 if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL)
2438 h->pointer_equality_needed = 1;
2442 /* If we are creating a shared library, and this is a reloc
2443 against a global symbol, or a non PC relative reloc
2444 against a local symbol, then we need to copy the reloc
2445 into the shared library. However, if we are linking with
2446 -Bsymbolic, we do not need to copy a reloc against a
2447 global symbol which is defined in an object we are
2448 including in the link (i.e., DEF_REGULAR is set). At
2449 this point we have not seen all the input files, so it is
2450 possible that DEF_REGULAR is not set now but will be set
2451 later (it is never cleared). In case of a weak definition,
2452 DEF_REGULAR may be cleared later by a strong definition in
2453 a shared library. We account for that possibility below by
2454 storing information in the relocs_copied field of the hash
2455 table entry. A similar situation occurs when creating
2456 shared libraries and symbol visibility changes render the
2459 If on the other hand, we are creating an executable, we
2460 may need to keep relocations for symbols satisfied by a
2461 dynamic library if we manage to avoid copy relocs for the
2464 if ((bfd_link_pic (info)
2465 && (sec->flags & SEC_ALLOC) != 0
2466 && (r_type != R_MICROBLAZE_64_PCREL
2468 && (! info->symbolic
2469 || h->root.type == bfd_link_hash_defweak
2470 || !h->def_regular))))
2471 || (!bfd_link_pic (info)
2472 && (sec->flags & SEC_ALLOC) != 0
2474 && (h->root.type == bfd_link_hash_defweak
2475 || !h->def_regular)))
2477 struct elf32_mb_dyn_relocs *p;
2478 struct elf32_mb_dyn_relocs **head;
2480 /* When creating a shared object, we must copy these
2481 relocs into the output file. We create a reloc
2482 section in dynobj and make room for the reloc. */
2488 if (htab->elf.dynobj == NULL)
2489 htab->elf.dynobj = abfd;
2490 dynobj = htab->elf.dynobj;
2492 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj,
2498 /* If this is a global symbol, we count the number of
2499 relocations we need for this symbol. */
2501 head = &((struct elf32_mb_link_hash_entry *) h)->dyn_relocs;
2504 /* Track dynamic relocs needed for local syms too.
2505 We really need local syms available to do this
2509 Elf_Internal_Sym *isym;
2512 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
2517 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2521 vpp = &elf_section_data (s)->local_dynrel;
2522 head = (struct elf32_mb_dyn_relocs **) vpp;
2526 if (p == NULL || p->sec != sec)
2528 bfd_size_type amt = sizeof *p;
2529 p = ((struct elf32_mb_dyn_relocs *)
2530 bfd_alloc (htab->elf.dynobj, amt));
2541 if (r_type == R_MICROBLAZE_64_PCREL)
2553 microblaze_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2555 struct elf32_mb_link_hash_table *htab;
2557 htab = elf32_mb_hash_table (info);
2561 if (!htab->sgot && !create_got_section (dynobj, info))
2564 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2567 htab->splt = bfd_get_linker_section (dynobj, ".plt");
2568 htab->srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
2569 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
2570 if (!bfd_link_pic (info))
2571 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
2573 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2574 || (!bfd_link_pic (info) && !htab->srelbss))
2580 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2583 microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info,
2584 struct elf_link_hash_entry *dir,
2585 struct elf_link_hash_entry *ind)
2587 struct elf32_mb_link_hash_entry *edir, *eind;
2589 edir = (struct elf32_mb_link_hash_entry *) dir;
2590 eind = (struct elf32_mb_link_hash_entry *) ind;
2592 if (eind->dyn_relocs != NULL)
2594 if (edir->dyn_relocs != NULL)
2596 struct elf32_mb_dyn_relocs **pp;
2597 struct elf32_mb_dyn_relocs *p;
2599 if (ind->root.type == bfd_link_hash_indirect)
2602 /* Add reloc counts against the weak sym to the strong sym
2603 list. Merge any entries against the same section. */
2604 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2606 struct elf32_mb_dyn_relocs *q;
2608 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2609 if (q->sec == p->sec)
2611 q->pc_count += p->pc_count;
2612 q->count += p->count;
2619 *pp = edir->dyn_relocs;
2622 edir->dyn_relocs = eind->dyn_relocs;
2623 eind->dyn_relocs = NULL;
2626 edir->tls_mask |= eind->tls_mask;
2628 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2632 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2633 struct elf_link_hash_entry *h)
2635 struct elf32_mb_link_hash_table *htab;
2636 struct elf32_mb_link_hash_entry * eh;
2637 struct elf32_mb_dyn_relocs *p;
2638 asection *sdynbss, *s;
2639 unsigned int power_of_two;
2642 htab = elf32_mb_hash_table (info);
2646 /* If this is a function, put it in the procedure linkage table. We
2647 will fill in the contents of the procedure linkage table later,
2648 when we know the address of the .got section. */
2649 if (h->type == STT_FUNC
2652 if (h->plt.refcount <= 0
2653 || SYMBOL_CALLS_LOCAL (info, h)
2654 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2655 && h->root.type == bfd_link_hash_undefweak))
2657 /* This case can occur if we saw a PLT reloc in an input
2658 file, but the symbol was never referred to by a dynamic
2659 object, or if all references were garbage collected. In
2660 such a case, we don't actually need to build a procedure
2661 linkage table, and we can just do a PC32 reloc instead. */
2662 h->plt.offset = (bfd_vma) -1;
2669 /* It's possible that we incorrectly decided a .plt reloc was
2670 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2671 check_relocs. We can't decide accurately between function and
2672 non-function syms in check-relocs; Objects loaded later in
2673 the link may change h->type. So fix it now. */
2674 h->plt.offset = (bfd_vma) -1;
2676 /* If this is a weak symbol, and there is a real definition, the
2677 processor independent code will have arranged for us to see the
2678 real definition first, and we can just use the same value. */
2679 if (h->u.weakdef != NULL)
2681 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2682 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2683 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2684 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2688 /* This is a reference to a symbol defined by a dynamic object which
2689 is not a function. */
2691 /* If we are creating a shared library, we must presume that the
2692 only references to the symbol are via the global offset table.
2693 For such cases we need not do anything here; the relocations will
2694 be handled correctly by relocate_section. */
2695 if (bfd_link_pic (info))
2698 /* If there are no references to this symbol that do not use the
2699 GOT, we don't need to generate a copy reloc. */
2700 if (!h->non_got_ref)
2703 /* If -z nocopyreloc was given, we won't generate them either. */
2704 if (info->nocopyreloc)
2710 eh = (struct elf32_mb_link_hash_entry *) h;
2711 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2713 s = p->sec->output_section;
2714 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2718 /* If we didn't find any dynamic relocs in read-only sections, then
2719 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2726 /* We must allocate the symbol in our .dynbss section, which will
2727 become part of the .bss section of the executable. There will be
2728 an entry for this symbol in the .dynsym section. The dynamic
2729 object will contain position independent code, so all references
2730 from the dynamic object to this symbol will go through the global
2731 offset table. The dynamic linker will use the .dynsym entry to
2732 determine the address it must put in the global offset table, so
2733 both the dynamic object and the regular object will refer to the
2734 same memory location for the variable. */
2736 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2737 to copy the initial value out of the dynamic object and into the
2738 runtime process image. */
2739 dynobj = elf_hash_table (info)->dynobj;
2740 BFD_ASSERT (dynobj != NULL);
2741 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2743 htab->srelbss->size += sizeof (Elf32_External_Rela);
2747 /* We need to figure out the alignment required for this symbol. I
2748 have no idea how ELF linkers handle this. */
2749 power_of_two = bfd_log2 (h->size);
2750 if (power_of_two > 3)
2753 sdynbss = htab->sdynbss;
2754 /* Apply the required alignment. */
2755 sdynbss->size = BFD_ALIGN (sdynbss->size, (bfd_size_type) (1 << power_of_two));
2756 if (power_of_two > bfd_get_section_alignment (dynobj, sdynbss))
2758 if (! bfd_set_section_alignment (dynobj, sdynbss, power_of_two))
2762 /* Define the symbol as being at this point in the section. */
2763 h->root.u.def.section = sdynbss;
2764 h->root.u.def.value = sdynbss->size;
2766 /* Increment the section size to make room for the symbol. */
2767 sdynbss->size += h->size;
2771 /* Allocate space in .plt, .got and associated reloc sections for
2775 allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat)
2777 struct bfd_link_info *info;
2778 struct elf32_mb_link_hash_table *htab;
2779 struct elf32_mb_link_hash_entry *eh;
2780 struct elf32_mb_dyn_relocs *p;
2782 if (h->root.type == bfd_link_hash_indirect)
2785 info = (struct bfd_link_info *) dat;
2786 htab = elf32_mb_hash_table (info);
2790 if (htab->elf.dynamic_sections_created
2791 && h->plt.refcount > 0)
2793 /* Make sure this symbol is output as a dynamic symbol.
2794 Undefined weak syms won't yet be marked as dynamic. */
2795 if (h->dynindx == -1
2796 && !h->forced_local)
2798 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2802 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
2804 asection *s = htab->splt;
2806 /* The first entry in .plt is reserved. */
2808 s->size = PLT_ENTRY_SIZE;
2810 h->plt.offset = s->size;
2812 /* If this symbol is not defined in a regular file, and we are
2813 not generating a shared library, then set the symbol to this
2814 location in the .plt. This is required to make function
2815 pointers compare as equal between the normal executable and
2816 the shared library. */
2817 if (! bfd_link_pic (info)
2820 h->root.u.def.section = s;
2821 h->root.u.def.value = h->plt.offset;
2824 /* Make room for this entry. */
2825 s->size += PLT_ENTRY_SIZE;
2827 /* We also need to make an entry in the .got.plt section, which
2828 will be placed in the .got section by the linker script. */
2829 htab->sgotplt->size += 4;
2831 /* We also need to make an entry in the .rel.plt section. */
2832 htab->srelplt->size += sizeof (Elf32_External_Rela);
2836 h->plt.offset = (bfd_vma) -1;
2842 h->plt.offset = (bfd_vma) -1;
2846 eh = (struct elf32_mb_link_hash_entry *) h;
2847 if (h->got.refcount > 0)
2852 /* Make sure this symbol is output as a dynamic symbol.
2853 Undefined weak syms won't yet be marked as dynamic. */
2854 if (h->dynindx == -1
2855 && !h->forced_local)
2857 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2862 if ((eh->tls_mask & TLS_TLS) != 0)
2864 /* Handle TLS Symbol */
2865 if ((eh->tls_mask & TLS_LD) != 0)
2867 if (!eh->elf.def_dynamic)
2868 /* We'll just use htab->tlsld_got.offset. This should
2869 always be the case. It's a little odd if we have
2870 a local dynamic reloc against a non-local symbol. */
2871 htab->tlsld_got.refcount += 1;
2875 if ((eh->tls_mask & TLS_GD) != 0)
2880 /* Regular (non-TLS) symbol */
2885 h->got.offset = (bfd_vma) -1;
2890 h->got.offset = s->size;
2892 htab->srelgot->size += need * (sizeof (Elf32_External_Rela) / 4);
2896 h->got.offset = (bfd_vma) -1;
2898 if (eh->dyn_relocs == NULL)
2901 /* In the shared -Bsymbolic case, discard space allocated for
2902 dynamic pc-relative relocs against symbols which turn out to be
2903 defined in regular objects. For the normal shared case, discard
2904 space for pc-relative relocs that have become local due to symbol
2905 visibility changes. */
2907 if (bfd_link_pic (info))
2913 struct elf32_mb_dyn_relocs **pp;
2915 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2917 p->count -= p->pc_count;
2928 /* For the non-shared case, discard space for relocs against
2929 symbols which turn out to need copy relocs or are not
2935 || (htab->elf.dynamic_sections_created
2936 && (h->root.type == bfd_link_hash_undefweak
2937 || h->root.type == bfd_link_hash_undefined))))
2939 /* Make sure this symbol is output as a dynamic symbol.
2940 Undefined weak syms won't yet be marked as dynamic. */
2941 if (h->dynindx == -1
2942 && !h->forced_local)
2944 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2948 /* If that succeeded, we know we'll be keeping all the
2950 if (h->dynindx != -1)
2954 eh->dyn_relocs = NULL;
2959 /* Finally, allocate space. */
2960 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2962 asection *sreloc = elf_section_data (p->sec)->sreloc;
2963 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2969 /* Set the sizes of the dynamic sections. */
2972 microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2973 struct bfd_link_info *info)
2975 struct elf32_mb_link_hash_table *htab;
2980 htab = elf32_mb_hash_table (info);
2984 dynobj = htab->elf.dynobj;
2985 BFD_ASSERT (dynobj != NULL);
2987 /* Set up .got offsets for local syms, and space for local dynamic
2989 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2991 bfd_signed_vma *local_got;
2992 bfd_signed_vma *end_local_got;
2993 bfd_size_type locsymcount;
2994 Elf_Internal_Shdr *symtab_hdr;
2995 unsigned char *lgot_masks;
2998 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
3001 for (s = ibfd->sections; s != NULL; s = s->next)
3003 struct elf32_mb_dyn_relocs *p;
3005 for (p = ((struct elf32_mb_dyn_relocs *)
3006 elf_section_data (s)->local_dynrel);
3010 if (!bfd_is_abs_section (p->sec)
3011 && bfd_is_abs_section (p->sec->output_section))
3013 /* Input section has been discarded, either because
3014 it is a copy of a linkonce section or due to
3015 linker script /DISCARD/, so we'll be discarding
3018 else if (p->count != 0)
3020 srel = elf_section_data (p->sec)->sreloc;
3021 srel->size += p->count * sizeof (Elf32_External_Rela);
3022 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
3023 info->flags |= DF_TEXTREL;
3028 local_got = elf_local_got_refcounts (ibfd);
3032 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3033 locsymcount = symtab_hdr->sh_info;
3034 end_local_got = local_got + locsymcount;
3035 lgot_masks = (unsigned char *) end_local_got;
3037 srel = htab->srelgot;
3039 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3043 unsigned int need = 0;
3044 if ((*lgot_masks & TLS_TLS) != 0)
3046 if ((*lgot_masks & TLS_GD) != 0)
3048 if ((*lgot_masks & TLS_LD) != 0)
3049 htab->tlsld_got.refcount += 1;
3056 *local_got = (bfd_vma) -1;
3060 *local_got = s->size;
3062 if (bfd_link_pic (info))
3063 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
3067 *local_got = (bfd_vma) -1;
3071 /* Allocate global sym .plt and .got entries, and space for global
3072 sym dynamic relocs. */
3073 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3075 if (htab->tlsld_got.refcount > 0)
3077 htab->tlsld_got.offset = htab->sgot->size;
3078 htab->sgot->size += 8;
3079 if (bfd_link_pic (info))
3080 htab->srelgot->size += sizeof (Elf32_External_Rela);
3083 htab->tlsld_got.offset = (bfd_vma) -1;
3085 if (elf_hash_table (info)->dynamic_sections_created)
3087 /* Make space for the trailing nop in .plt. */
3088 if (htab->splt->size > 0)
3089 htab->splt->size += 4;
3092 /* The check_relocs and adjust_dynamic_symbol entry points have
3093 determined the sizes of the various dynamic sections. Allocate
3095 for (s = dynobj->sections; s != NULL; s = s->next)
3098 bfd_boolean strip = FALSE;
3100 if ((s->flags & SEC_LINKER_CREATED) == 0)
3103 /* It's OK to base decisions on the section name, because none
3104 of the dynobj section names depend upon the input files. */
3105 name = bfd_get_section_name (dynobj, s);
3107 if (strncmp (name, ".rela", 5) == 0)
3111 /* If we don't need this section, strip it from the
3112 output file. This is to handle .rela.bss and
3113 .rela.plt. We must create it in
3114 create_dynamic_sections, because it must be created
3115 before the linker maps input sections to output
3116 sections. The linker does that before
3117 adjust_dynamic_symbol is called, and it is that
3118 function which decides whether anything needs to go
3119 into these sections. */
3124 /* We use the reloc_count field as a counter if we need
3125 to copy relocs into the output file. */
3129 else if (s != htab->splt && s != htab->sgot && s != htab->sgotplt)
3131 /* It's not one of our sections, so don't allocate space. */
3137 s->flags |= SEC_EXCLUDE;
3141 /* Allocate memory for the section contents. */
3142 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3143 Unused entries should be reclaimed before the section's contents
3144 are written out, but at the moment this does not happen. Thus in
3145 order to prevent writing out garbage, we initialise the section's
3146 contents to zero. */
3147 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3148 if (s->contents == NULL && s->size != 0)
3152 if (elf_hash_table (info)->dynamic_sections_created)
3154 /* Add some entries to the .dynamic section. We fill in the
3155 values later, in microblaze_elf_finish_dynamic_sections, but we
3156 must add the entries now so that we get the correct size for
3157 the .dynamic section. The DT_DEBUG entry is filled in by the
3158 dynamic linker and used by the debugger. */
3159 #define add_dynamic_entry(TAG, VAL) \
3160 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3162 if (bfd_link_executable (info))
3164 if (!add_dynamic_entry (DT_DEBUG, 0))
3168 if (!add_dynamic_entry (DT_RELA, 0)
3169 || !add_dynamic_entry (DT_RELASZ, 0)
3170 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3173 if (htab->splt->size != 0)
3175 if (!add_dynamic_entry (DT_PLTGOT, 0)
3176 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3177 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3178 || !add_dynamic_entry (DT_JMPREL, 0)
3179 || !add_dynamic_entry (DT_BIND_NOW, 1))
3183 if (info->flags & DF_TEXTREL)
3185 if (!add_dynamic_entry (DT_TEXTREL, 0))
3189 #undef add_dynamic_entry
3193 /* Finish up dynamic symbol handling. We set the contents of various
3194 dynamic sections here. */
3197 microblaze_elf_finish_dynamic_symbol (bfd *output_bfd,
3198 struct bfd_link_info *info,
3199 struct elf_link_hash_entry *h,
3200 Elf_Internal_Sym *sym)
3202 struct elf32_mb_link_hash_table *htab;
3203 struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h);
3205 htab = elf32_mb_hash_table (info);
3209 if (h->plt.offset != (bfd_vma) -1)
3214 Elf_Internal_Rela rela;
3220 /* This symbol has an entry in the procedure linkage table. Set
3222 BFD_ASSERT (h->dynindx != -1);
3225 srela = htab->srelplt;
3226 sgotplt = htab->sgotplt;
3227 BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL);
3229 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */
3230 got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */
3231 got_addr = got_offset;
3233 /* For non-PIC objects we need absolute address of the GOT entry. */
3234 if (!bfd_link_pic (info))
3235 got_addr += htab->sgotplt->output_section->vma + sgotplt->output_offset;
3237 /* Fill in the entry in the procedure linkage table. */
3238 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff),
3239 splt->contents + h->plt.offset);
3240 if (bfd_link_pic (info))
3241 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff),
3242 splt->contents + h->plt.offset + 4);
3244 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff),
3245 splt->contents + h->plt.offset + 4);
3246 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2,
3247 splt->contents + h->plt.offset + 8);
3248 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3,
3249 splt->contents + h->plt.offset + 12);
3251 /* Any additions to the .got section??? */
3252 /* bfd_put_32 (output_bfd,
3253 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3254 sgotplt->contents + got_offset); */
3256 /* Fill in the entry in the .rela.plt section. */
3257 rela.r_offset = (sgotplt->output_section->vma
3258 + sgotplt->output_offset
3260 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT);
3262 loc = srela->contents;
3263 loc += plt_index * sizeof (Elf32_External_Rela);
3264 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3266 if (!h->def_regular)
3268 /* Mark the symbol as undefined, rather than as defined in
3269 the .plt section. Zero the value. */
3270 sym->st_shndx = SHN_UNDEF;
3275 /* h->got.refcount to be checked ? */
3276 if (h->got.offset != (bfd_vma) -1 &&
3277 ! ((h->got.offset & 1) ||
3278 IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask)))
3284 /* This symbol has an entry in the global offset table. Set it
3288 srela = htab->srelgot;
3289 BFD_ASSERT (sgot != NULL && srela != NULL);
3291 offset = (sgot->output_section->vma + sgot->output_offset
3292 + (h->got.offset &~ (bfd_vma) 1));
3294 /* If this is a -Bsymbolic link, and the symbol is defined
3295 locally, we just want to emit a RELATIVE reloc. Likewise if
3296 the symbol was forced to be local because of a version file.
3297 The entry in the global offset table will already have been
3298 initialized in the relocate_section function. */
3299 if (bfd_link_pic (info)
3300 && ((info->symbolic && h->def_regular)
3301 || h->dynindx == -1))
3303 asection *sec = h->root.u.def.section;
3304 microblaze_elf_output_dynamic_relocation (output_bfd,
3305 srela, srela->reloc_count++,
3307 R_MICROBLAZE_REL, offset,
3309 + sec->output_section->vma
3310 + sec->output_offset);
3314 microblaze_elf_output_dynamic_relocation (output_bfd,
3315 srela, srela->reloc_count++,
3317 R_MICROBLAZE_GLOB_DAT,
3321 bfd_put_32 (output_bfd, (bfd_vma) 0,
3322 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
3328 Elf_Internal_Rela rela;
3331 /* This symbols needs a copy reloc. Set it up. */
3333 BFD_ASSERT (h->dynindx != -1);
3335 s = bfd_get_linker_section (htab->elf.dynobj, ".rela.bss");
3336 BFD_ASSERT (s != NULL);
3338 rela.r_offset = (h->root.u.def.value
3339 + h->root.u.def.section->output_section->vma
3340 + h->root.u.def.section->output_offset);
3341 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY);
3343 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3344 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3347 /* Mark some specially defined symbols as absolute. */
3348 if (h == htab->elf.hdynamic
3349 || h == htab->elf.hgot
3350 || h == htab->elf.hplt)
3351 sym->st_shndx = SHN_ABS;
3357 /* Finish up the dynamic sections. */
3360 microblaze_elf_finish_dynamic_sections (bfd *output_bfd,
3361 struct bfd_link_info *info)
3364 asection *sdyn, *sgot;
3365 struct elf32_mb_link_hash_table *htab;
3367 htab = elf32_mb_hash_table (info);
3371 dynobj = htab->elf.dynobj;
3373 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3375 if (htab->elf.dynamic_sections_created)
3378 Elf32_External_Dyn *dyncon, *dynconend;
3380 splt = bfd_get_linker_section (dynobj, ".plt");
3381 BFD_ASSERT (splt != NULL && sdyn != NULL);
3383 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3384 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3385 for (; dyncon < dynconend; dyncon++)
3387 Elf_Internal_Dyn dyn;
3391 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3395 case DT_PLTGOT: name = ".got.plt"; size = FALSE; break;
3396 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
3397 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
3398 case DT_RELA: name = ".rela.dyn"; size = FALSE; break;
3399 case DT_RELASZ: name = ".rela.dyn"; size = TRUE; break;
3400 default: name = NULL; size = FALSE; break;
3407 s = bfd_get_linker_section (dynobj, name);
3413 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3415 dyn.d_un.d_val = s->size;
3417 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3421 /* Clear the first entry in the procedure linkage table,
3422 and put a nop in the last four bytes. */
3425 memset (splt->contents, 0, PLT_ENTRY_SIZE);
3426 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */,
3427 splt->contents + splt->size - 4);
3430 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3433 /* Set the first entry in the global offset table to the address of
3434 the dynamic section. */
3435 sgot = bfd_get_linker_section (dynobj, ".got.plt");
3436 if (sgot && sgot->size > 0)
3439 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3441 bfd_put_32 (output_bfd,
3442 sdyn->output_section->vma + sdyn->output_offset,
3444 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3447 if (htab->sgot && htab->sgot->size > 0)
3448 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3453 /* Hook called by the linker routine which adds symbols from an object
3454 file. We use it to put .comm items in .sbss, and not .bss. */
3457 microblaze_elf_add_symbol_hook (bfd *abfd,
3458 struct bfd_link_info *info,
3459 Elf_Internal_Sym *sym,
3460 const char **namep ATTRIBUTE_UNUSED,
3461 flagword *flagsp ATTRIBUTE_UNUSED,
3465 if (sym->st_shndx == SHN_COMMON
3466 && !bfd_link_relocatable (info)
3467 && sym->st_size <= elf_gp_size (abfd))
3469 /* Common symbols less than or equal to -G nn bytes are automatically
3471 *secp = bfd_make_section_old_way (abfd, ".sbss");
3473 || ! bfd_set_section_flags (abfd, *secp, SEC_IS_COMMON))
3476 *valp = sym->st_size;
3482 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec
3483 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3485 #define TARGET_BIG_SYM microblaze_elf32_vec
3486 #define TARGET_BIG_NAME "elf32-microblaze"
3488 #define ELF_ARCH bfd_arch_microblaze
3489 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3490 #define ELF_MACHINE_CODE EM_MICROBLAZE
3491 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3492 #define ELF_MAXPAGESIZE 0x1000
3493 #define elf_info_to_howto microblaze_elf_info_to_howto
3494 #define elf_info_to_howto_rel NULL
3496 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3497 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3498 #define elf_backend_relocate_section microblaze_elf_relocate_section
3499 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3500 #define bfd_elf32_bfd_merge_private_bfd_data microblaze_elf_merge_private_bfd_data
3501 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3503 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3504 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3505 #define elf_backend_check_relocs microblaze_elf_check_relocs
3506 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3507 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3508 #define elf_backend_can_gc_sections 1
3509 #define elf_backend_can_refcount 1
3510 #define elf_backend_want_got_plt 1
3511 #define elf_backend_plt_readonly 1
3512 #define elf_backend_got_header_size 12
3513 #define elf_backend_rela_normal 1
3515 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3516 #define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections
3517 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3518 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3519 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3520 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3522 #include "elf32-target.h"