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);
1202 case (int) R_MICROBLAZE_GOT_64:
1207 bfd_vma static_value;
1209 bfd_boolean need_relocs = FALSE;
1210 if (htab->sgot == NULL)
1216 /* 1. Identify GOT Offset;
1217 2. Compute Static Values
1218 3. Process Module Id, Process Offset
1219 4. Fixup Relocation with GOT offset value. */
1221 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1222 if (IS_TLS_LD (tls_type))
1223 offp = &htab->tlsld_got.offset;
1226 if (htab->sgotplt != NULL && h->got.offset != (bfd_vma) -1)
1227 offp = &h->got.offset;
1233 if (local_got_offsets == NULL)
1235 offp = &local_got_offsets[r_symndx];
1244 if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type))
1247 /* Symbol index to use for relocs */
1251 elf_hash_table (info)->dynamic_sections_created;
1253 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
1254 bfd_link_pic (info),
1256 && (!bfd_link_pic (info)
1257 || !SYMBOL_REFERENCES_LOCAL (info, h)))
1261 /* Need to generate relocs ? */
1262 if ((bfd_link_pic (info) || indx != 0)
1264 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1265 || h->root.type != bfd_link_hash_undefweak))
1268 /* 2. Compute/Emit Static value of r-expression */
1269 static_value = relocation + addend;
1271 /* 3. Process module-id and offset */
1272 if (! ((*offp) & 1) )
1276 got_offset = (htab->sgot->output_section->vma
1277 + htab->sgot->output_offset
1280 /* Process module-id */
1281 if (IS_TLS_LD(tls_type))
1283 if (! bfd_link_pic (info))
1285 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off);
1289 microblaze_elf_output_dynamic_relocation (output_bfd,
1290 htab->srelgot, htab->srelgot->reloc_count++,
1291 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32,
1295 else if (IS_TLS_GD(tls_type))
1299 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off);
1303 microblaze_elf_output_dynamic_relocation (output_bfd,
1305 htab->srelgot->reloc_count++,
1306 /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32,
1307 got_offset, indx ? 0 : static_value);
1311 /* Process Offset */
1312 if (htab->srelgot == NULL)
1315 got_offset = (htab->sgot->output_section->vma
1316 + htab->sgot->output_offset
1318 if (IS_TLS_LD(tls_type))
1320 /* For LD, offset should be 0 */
1322 bfd_put_32 (output_bfd, 0, htab->sgot->contents + off2);
1324 else if (IS_TLS_GD(tls_type))
1327 static_value -= dtprel_base(info);
1330 microblaze_elf_output_dynamic_relocation (output_bfd,
1331 htab->srelgot, htab->srelgot->reloc_count++,
1332 /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32,
1333 got_offset, indx ? 0 : static_value);
1337 bfd_put_32 (output_bfd, static_value,
1338 htab->sgot->contents + off2);
1343 bfd_put_32 (output_bfd, static_value,
1344 htab->sgot->contents + off2);
1346 /* Relocs for dyn symbols generated by
1347 finish_dynamic_symbols */
1348 if (bfd_link_pic (info) && h == NULL)
1351 microblaze_elf_output_dynamic_relocation (output_bfd,
1352 htab->srelgot, htab->srelgot->reloc_count++,
1353 /* symindex= */ indx, R_MICROBLAZE_REL,
1354 got_offset, static_value);
1359 /* 4. Fixup Relocation with GOT offset value
1360 Compute relative address of GOT entry for applying
1361 the current relocation */
1362 relocation = htab->sgot->output_section->vma
1363 + htab->sgot->output_offset
1365 - htab->sgotplt->output_section->vma
1366 - htab->sgotplt->output_offset;
1368 /* Apply Current Relocation */
1369 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1370 contents + offset + endian);
1371 bfd_put_16 (input_bfd, relocation & 0xffff,
1372 contents + offset + endian + INST_WORD_SIZE);
1374 unresolved_reloc = FALSE;
1378 case (int) R_MICROBLAZE_GOTOFF_64:
1381 unsigned short lo, high;
1382 relocation += addend;
1383 relocation -= htab->sgotplt->output_section->vma
1384 + htab->sgotplt->output_offset;
1385 /* Write this value into correct location. */
1386 immediate = relocation;
1387 lo = immediate & 0x0000ffff;
1388 high = (immediate >> 16) & 0x0000ffff;
1389 bfd_put_16 (input_bfd, high, contents + offset + endian);
1390 bfd_put_16 (input_bfd, lo, contents + offset + INST_WORD_SIZE + endian);
1394 case (int) R_MICROBLAZE_GOTOFF_32:
1396 relocation += addend;
1397 relocation -= htab->sgotplt->output_section->vma
1398 + htab->sgotplt->output_offset;
1399 /* Write this value into correct location. */
1400 bfd_put_32 (input_bfd, relocation, contents + offset);
1404 case (int) R_MICROBLAZE_TLSDTPREL64:
1405 relocation += addend;
1406 relocation -= dtprel_base(info);
1407 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1408 contents + offset + 2);
1409 bfd_put_16 (input_bfd, relocation & 0xffff,
1410 contents + offset + 2 + INST_WORD_SIZE);
1412 case (int) R_MICROBLAZE_64_PCREL :
1413 case (int) R_MICROBLAZE_64:
1414 case (int) R_MICROBLAZE_32:
1416 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1417 from removed linkonce sections, or sections discarded by
1419 if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0)
1421 relocation += addend;
1422 if (r_type == R_MICROBLAZE_32)
1423 bfd_put_32 (input_bfd, relocation, contents + offset);
1426 if (r_type == R_MICROBLAZE_64_PCREL)
1427 relocation -= (input_section->output_section->vma
1428 + input_section->output_offset
1429 + offset + INST_WORD_SIZE);
1430 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1431 contents + offset + endian);
1432 bfd_put_16 (input_bfd, relocation & 0xffff,
1433 contents + offset + endian + INST_WORD_SIZE);
1438 if ((bfd_link_pic (info)
1440 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1441 || h->root.type != bfd_link_hash_undefweak)
1442 && (!howto->pc_relative
1446 || !h->def_regular))))
1447 || (!bfd_link_pic (info)
1453 || h->root.type == bfd_link_hash_undefweak
1454 || h->root.type == bfd_link_hash_undefined)))
1456 Elf_Internal_Rela outrel;
1460 /* When generating a shared object, these relocations
1461 are copied into the output file to be resolved at run
1464 BFD_ASSERT (sreloc != NULL);
1469 _bfd_elf_section_offset (output_bfd, info, input_section,
1471 if (outrel.r_offset == (bfd_vma) -1)
1473 else if (outrel.r_offset == (bfd_vma) -2)
1475 outrel.r_offset += (input_section->output_section->vma
1476 + input_section->output_offset);
1479 memset (&outrel, 0, sizeof outrel);
1480 /* h->dynindx may be -1 if the symbol was marked to
1483 && ((! info->symbolic && h->dynindx != -1)
1484 || !h->def_regular))
1486 BFD_ASSERT (h->dynindx != -1);
1487 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1488 outrel.r_addend = addend;
1492 if (r_type == R_MICROBLAZE_32)
1494 outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
1495 outrel.r_addend = relocation + addend;
1501 (_("%B: probably compiled without -fPIC?"),
1503 bfd_set_error (bfd_error_bad_value);
1508 loc = sreloc->contents;
1509 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1510 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1515 relocation += addend;
1516 if (r_type == R_MICROBLAZE_32)
1517 bfd_put_32 (input_bfd, relocation, contents + offset);
1520 if (r_type == R_MICROBLAZE_64_PCREL)
1521 relocation -= (input_section->output_section->vma
1522 + input_section->output_offset
1523 + offset + INST_WORD_SIZE);
1524 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
1525 contents + offset + endian);
1526 bfd_put_16 (input_bfd, relocation & 0xffff,
1527 contents + offset + endian + INST_WORD_SIZE);
1534 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1536 relocation, addend);
1543 if (r != bfd_reloc_ok)
1545 /* FIXME: This should be generic enough to go in a utility. */
1549 name = h->root.root.string;
1552 name = (bfd_elf_string_from_elf_section
1553 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1554 if (name == NULL || *name == '\0')
1555 name = bfd_section_name (input_bfd, sec);
1563 case bfd_reloc_overflow:
1564 (*info->callbacks->reloc_overflow)
1565 (info, (h ? &h->root : NULL), name, howto->name,
1566 (bfd_vma) 0, input_bfd, input_section, offset);
1569 case bfd_reloc_undefined:
1570 (*info->callbacks->undefined_symbol)
1571 (info, name, input_bfd, input_section, offset, TRUE);
1574 case bfd_reloc_outofrange:
1575 errmsg = _("internal error: out of range error");
1578 case bfd_reloc_notsupported:
1579 errmsg = _("internal error: unsupported relocation error");
1582 case bfd_reloc_dangerous:
1583 errmsg = _("internal error: dangerous error");
1587 errmsg = _("internal error: unknown error");
1590 (*info->callbacks->warning) (info, errmsg, name, input_bfd,
1591 input_section, offset);
1600 /* Calculate fixup value for reference. */
1603 calc_fixup (bfd_vma start, bfd_vma size, asection *sec)
1605 bfd_vma end = start + size;
1608 if (sec == NULL || sec->relax == NULL)
1611 /* Look for addr in relax table, total fixup value. */
1612 for (i = 0; i < sec->relax_count; i++)
1614 if (end <= sec->relax[i].addr)
1616 if ((end != start) && (start > sec->relax[i].addr))
1618 fixup += sec->relax[i].size;
1623 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1624 a 32-bit instruction. */
1626 microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1628 unsigned long instr = bfd_get_32 (abfd, bfd_addr);
1629 instr &= ~0x0000ffff;
1630 instr |= (val & 0x0000ffff);
1631 bfd_put_32 (abfd, instr, bfd_addr);
1634 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1635 two consecutive 32-bit instructions. */
1637 microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val)
1639 unsigned long instr_hi;
1640 unsigned long instr_lo;
1642 instr_hi = bfd_get_32 (abfd, bfd_addr);
1643 instr_hi &= ~0x0000ffff;
1644 instr_hi |= ((val >> 16) & 0x0000ffff);
1645 bfd_put_32 (abfd, instr_hi, bfd_addr);
1647 instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE);
1648 instr_lo &= ~0x0000ffff;
1649 instr_lo |= (val & 0x0000ffff);
1650 bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE);
1654 microblaze_elf_relax_section (bfd *abfd,
1656 struct bfd_link_info *link_info,
1659 Elf_Internal_Shdr *symtab_hdr;
1660 Elf_Internal_Rela *internal_relocs;
1661 Elf_Internal_Rela *free_relocs = NULL;
1662 Elf_Internal_Rela *irel, *irelend;
1663 bfd_byte *contents = NULL;
1664 bfd_byte *free_contents = NULL;
1669 struct elf_link_hash_entry *sym_hash;
1670 Elf_Internal_Sym *isymbuf, *isymend;
1671 Elf_Internal_Sym *isym;
1676 /* We only do this once per section. We may be able to delete some code
1677 by running multiple passes, but it is not worth it. */
1680 /* Only do this for a text section. */
1681 if (bfd_link_relocatable (link_info)
1682 || (sec->flags & SEC_RELOC) == 0
1683 || (sec->reloc_count == 0)
1684 || (sec->flags & SEC_CODE) == 0)
1687 BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0));
1689 /* If this is the first time we have been called for this section,
1690 initialize the cooked size. */
1692 sec->size = sec->rawsize;
1694 /* Get symbols for this section. */
1695 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1696 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1697 symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
1698 if (isymbuf == NULL)
1699 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount,
1700 0, NULL, NULL, NULL);
1701 BFD_ASSERT (isymbuf != NULL);
1703 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
1704 if (internal_relocs == NULL)
1706 if (! link_info->keep_memory)
1707 free_relocs = internal_relocs;
1709 sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1)
1710 * sizeof (struct relax_table));
1711 if (sec->relax == NULL)
1713 sec->relax_count = 0;
1715 irelend = internal_relocs + sec->reloc_count;
1717 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1720 if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL)
1721 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64 ))
1722 continue; /* Can't delete this reloc. */
1724 /* Get the section contents. */
1725 if (contents == NULL)
1727 if (elf_section_data (sec)->this_hdr.contents != NULL)
1728 contents = elf_section_data (sec)->this_hdr.contents;
1731 contents = (bfd_byte *) bfd_malloc (sec->size);
1732 if (contents == NULL)
1734 free_contents = contents;
1736 if (!bfd_get_section_contents (abfd, sec, contents,
1737 (file_ptr) 0, sec->size))
1739 elf_section_data (sec)->this_hdr.contents = contents;
1743 /* Get the value of the symbol referred to by the reloc. */
1744 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1746 /* A local symbol. */
1749 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1750 if (isym->st_shndx == SHN_UNDEF)
1751 sym_sec = bfd_und_section_ptr;
1752 else if (isym->st_shndx == SHN_ABS)
1753 sym_sec = bfd_abs_section_ptr;
1754 else if (isym->st_shndx == SHN_COMMON)
1755 sym_sec = bfd_com_section_ptr;
1757 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1759 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
1764 struct elf_link_hash_entry *h;
1766 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1767 h = elf_sym_hashes (abfd)[indx];
1768 BFD_ASSERT (h != NULL);
1770 if (h->root.type != bfd_link_hash_defined
1771 && h->root.type != bfd_link_hash_defweak)
1772 /* This appears to be a reference to an undefined
1773 symbol. Just ignore it--it will be caught by the
1774 regular reloc processing. */
1777 symval = (h->root.u.def.value
1778 + h->root.u.def.section->output_section->vma
1779 + h->root.u.def.section->output_offset);
1782 /* If this is a PC-relative reloc, subtract the instr offset from
1783 the symbol value. */
1784 if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL)
1786 symval = symval + irel->r_addend
1788 + sec->output_section->vma
1789 + sec->output_offset);
1792 symval += irel->r_addend;
1794 if ((symval & 0xffff8000) == 0
1795 || (symval & 0xffff8000) == 0xffff8000)
1797 /* We can delete this instruction. */
1798 sec->relax[sec->relax_count].addr = irel->r_offset;
1799 sec->relax[sec->relax_count].size = INST_WORD_SIZE;
1802 /* Rewrite relocation type. */
1803 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1805 case R_MICROBLAZE_64_PCREL:
1806 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1807 (int) R_MICROBLAZE_32_PCREL_LO);
1809 case R_MICROBLAZE_64:
1810 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1811 (int) R_MICROBLAZE_32_LO);
1814 /* Cannot happen. */
1818 } /* Loop through all relocations. */
1820 /* Loop through the relocs again, and see if anything needs to change. */
1821 if (sec->relax_count > 0)
1823 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1825 sec->relax[sec->relax_count].addr = sec->size;
1827 for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
1831 /* Get the new reloc address. */
1832 nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec);
1833 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
1837 case R_MICROBLAZE_64_PCREL:
1839 case R_MICROBLAZE_64:
1840 case R_MICROBLAZE_32_LO:
1841 /* If this reloc is against a symbol defined in this
1842 section, we must check the addend to see it will put the value in
1843 range to be adjusted, and hence must be changed. */
1844 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1846 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1847 /* Only handle relocs against .text. */
1848 if (isym->st_shndx == shndx
1849 && ELF32_ST_TYPE (isym->st_info) == STT_SECTION)
1850 irel->r_addend -= calc_fixup (irel->r_addend, 0, sec);
1853 case R_MICROBLAZE_NONE:
1855 /* This was a PC-relative instruction that was
1856 completely resolved. */
1858 bfd_vma target_address;
1859 target_address = irel->r_addend + irel->r_offset;
1860 sfix = calc_fixup (irel->r_offset, 0, sec);
1861 efix = calc_fixup (target_address, 0, sec);
1862 irel->r_addend -= (efix - sfix);
1863 /* Should use HOWTO. */
1864 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset,
1868 case R_MICROBLAZE_64_NONE:
1870 /* This was a PC-relative 64-bit instruction that was
1871 completely resolved. */
1873 bfd_vma target_address;
1874 target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE;
1875 sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec);
1876 efix = calc_fixup (target_address, 0, sec);
1877 irel->r_addend -= (efix - sfix);
1878 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset
1879 + INST_WORD_SIZE, irel->r_addend);
1883 irel->r_offset = nraddr;
1884 } /* Change all relocs in this section. */
1886 /* Look through all other sections. */
1887 for (o = abfd->sections; o != NULL; o = o->next)
1889 Elf_Internal_Rela *irelocs;
1890 Elf_Internal_Rela *irelscan, *irelscanend;
1891 bfd_byte *ocontents;
1894 || (o->flags & SEC_RELOC) == 0
1895 || o->reloc_count == 0)
1898 /* We always cache the relocs. Perhaps, if info->keep_memory is
1899 FALSE, we should free them, if we are permitted to. */
1901 irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE);
1902 if (irelocs == NULL)
1906 irelscanend = irelocs + o->reloc_count;
1907 for (irelscan = irelocs; irelscan < irelscanend; irelscan++)
1909 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32)
1911 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1913 /* Look at the reloc only if the value has been resolved. */
1914 if (isym->st_shndx == shndx
1915 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1917 if (ocontents == NULL)
1919 if (elf_section_data (o)->this_hdr.contents != NULL)
1920 ocontents = elf_section_data (o)->this_hdr.contents;
1923 /* We always cache the section contents.
1924 Perhaps, if info->keep_memory is FALSE, we
1925 should free them, if we are permitted to. */
1926 if (o->rawsize == 0)
1927 o->rawsize = o->size;
1928 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1929 if (ocontents == NULL)
1931 if (!bfd_get_section_contents (abfd, o, ocontents,
1935 elf_section_data (o)->this_hdr.contents = ocontents;
1939 irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec);
1941 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM)
1943 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1945 /* Look at the reloc only if the value has been resolved. */
1946 if (ocontents == NULL)
1948 if (elf_section_data (o)->this_hdr.contents != NULL)
1949 ocontents = elf_section_data (o)->this_hdr.contents;
1952 /* We always cache the section contents.
1953 Perhaps, if info->keep_memory is FALSE, we
1954 should free them, if we are permitted to. */
1956 if (o->rawsize == 0)
1957 o->rawsize = o->size;
1958 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1959 if (ocontents == NULL)
1961 if (!bfd_get_section_contents (abfd, o, ocontents,
1965 elf_section_data (o)->this_hdr.contents = ocontents;
1968 irelscan->r_addend -= calc_fixup (irel->r_addend
1974 else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO)
1975 || (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_LO))
1977 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
1979 /* Look at the reloc only if the value has been resolved. */
1980 if (isym->st_shndx == shndx
1981 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
1984 bfd_vma target_address;
1986 if (ocontents == NULL)
1988 if (elf_section_data (o)->this_hdr.contents != NULL)
1989 ocontents = elf_section_data (o)->this_hdr.contents;
1992 /* We always cache the section contents.
1993 Perhaps, if info->keep_memory is FALSE, we
1994 should free them, if we are permitted to. */
1995 if (o->rawsize == 0)
1996 o->rawsize = o->size;
1997 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
1998 if (ocontents == NULL)
2000 if (!bfd_get_section_contents (abfd, o, ocontents,
2004 elf_section_data (o)->this_hdr.contents = ocontents;
2008 unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
2009 immediate = instr & 0x0000ffff;
2010 target_address = immediate;
2011 offset = calc_fixup (target_address, 0, sec);
2012 immediate -= offset;
2013 irelscan->r_addend -= offset;
2014 microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset,
2015 irelscan->r_addend);
2019 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64)
2021 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2023 /* Look at the reloc only if the value has been resolved. */
2024 if (isym->st_shndx == shndx
2025 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2029 if (ocontents == NULL)
2031 if (elf_section_data (o)->this_hdr.contents != NULL)
2032 ocontents = elf_section_data (o)->this_hdr.contents;
2035 /* We always cache the section contents.
2036 Perhaps, if info->keep_memory is FALSE, we
2037 should free them, if we are permitted to. */
2039 if (o->rawsize == 0)
2040 o->rawsize = o->size;
2041 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2042 if (ocontents == NULL)
2044 if (!bfd_get_section_contents (abfd, o, ocontents,
2048 elf_section_data (o)->this_hdr.contents = ocontents;
2051 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2052 + irelscan->r_offset);
2053 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2054 + irelscan->r_offset
2056 immediate = (instr_hi & 0x0000ffff) << 16;
2057 immediate |= (instr_lo & 0x0000ffff);
2058 offset = calc_fixup (irelscan->r_addend, 0, sec);
2059 immediate -= offset;
2060 irelscan->r_addend -= offset;
2063 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL)
2065 isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
2067 /* Look at the reloc only if the value has been resolved. */
2068 if (isym->st_shndx == shndx
2069 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
2072 bfd_vma target_address;
2074 if (ocontents == NULL)
2076 if (elf_section_data (o)->this_hdr.contents != NULL)
2077 ocontents = elf_section_data (o)->this_hdr.contents;
2080 /* We always cache the section contents.
2081 Perhaps, if info->keep_memory is FALSE, we
2082 should free them, if we are permitted to. */
2083 if (o->rawsize == 0)
2084 o->rawsize = o->size;
2085 ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
2086 if (ocontents == NULL)
2088 if (!bfd_get_section_contents (abfd, o, ocontents,
2092 elf_section_data (o)->this_hdr.contents = ocontents;
2095 unsigned long instr_hi = bfd_get_32 (abfd, ocontents
2096 + irelscan->r_offset);
2097 unsigned long instr_lo = bfd_get_32 (abfd, ocontents
2098 + irelscan->r_offset
2100 immediate = (instr_hi & 0x0000ffff) << 16;
2101 immediate |= (instr_lo & 0x0000ffff);
2102 target_address = immediate;
2103 offset = calc_fixup (target_address, 0, sec);
2104 immediate -= offset;
2105 irelscan->r_addend -= offset;
2106 microblaze_bfd_write_imm_value_64 (abfd, ocontents
2107 + irelscan->r_offset, immediate);
2113 /* Adjust the local symbols defined in this section. */
2114 isymend = isymbuf + symtab_hdr->sh_info;
2115 for (isym = isymbuf; isym < isymend; isym++)
2117 if (isym->st_shndx == shndx)
2119 isym->st_value -= calc_fixup (isym->st_value, 0, sec);
2121 isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec);
2125 /* Now adjust the global symbols defined in this section. */
2126 isym = isymbuf + symtab_hdr->sh_info;
2127 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info;
2128 for (sym_index = 0; sym_index < symcount; sym_index++)
2130 sym_hash = elf_sym_hashes (abfd)[sym_index];
2131 if ((sym_hash->root.type == bfd_link_hash_defined
2132 || sym_hash->root.type == bfd_link_hash_defweak)
2133 && sym_hash->root.u.def.section == sec)
2135 sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value,
2138 sym_hash->size -= calc_fixup (sym_hash->root.u.def.value,
2139 sym_hash->size, sec);
2143 /* Physically move the code and change the cooked size. */
2144 dest = sec->relax[0].addr;
2145 for (i = 0; i < sec->relax_count; i++)
2148 src = sec->relax[i].addr + sec->relax[i].size;
2149 len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size;
2151 memmove (contents + dest, contents + src, len);
2152 sec->size -= sec->relax[i].size;
2156 elf_section_data (sec)->relocs = internal_relocs;
2159 elf_section_data (sec)->this_hdr.contents = contents;
2160 free_contents = NULL;
2162 symtab_hdr->contents = (bfd_byte *) isymbuf;
2165 if (free_relocs != NULL)
2171 if (free_contents != NULL)
2173 if (!link_info->keep_memory)
2174 free (free_contents);
2176 /* Cache the section contents for elf_link_input_bfd. */
2177 elf_section_data (sec)->this_hdr.contents = contents;
2178 free_contents = NULL;
2181 if (sec->relax_count == 0)
2192 if (free_relocs != NULL)
2194 if (free_contents != NULL)
2195 free (free_contents);
2196 if (sec->relax != NULL)
2200 sec->relax_count = 0;
2205 /* Return the section that should be marked against GC for a given
2209 microblaze_elf_gc_mark_hook (asection *sec,
2210 struct bfd_link_info * info,
2211 Elf_Internal_Rela * rel,
2212 struct elf_link_hash_entry * h,
2213 Elf_Internal_Sym * sym)
2216 switch (ELF32_R_TYPE (rel->r_info))
2218 case R_MICROBLAZE_GNU_VTINHERIT:
2219 case R_MICROBLAZE_GNU_VTENTRY:
2223 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2226 /* Update the got entry reference counts for the section being removed. */
2229 microblaze_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
2230 struct bfd_link_info * info ATTRIBUTE_UNUSED,
2231 asection * sec ATTRIBUTE_UNUSED,
2232 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
2239 #define PLT_ENTRY_SIZE 16
2241 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2242 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2243 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2244 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2245 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2247 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
2248 shortcuts to them in our hash table. */
2251 create_got_section (bfd *dynobj, struct bfd_link_info *info)
2253 struct elf32_mb_link_hash_table *htab;
2255 if (! _bfd_elf_create_got_section (dynobj, info))
2257 htab = elf32_mb_hash_table (info);
2261 htab->sgot = bfd_get_linker_section (dynobj, ".got");
2262 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2263 if (!htab->sgot || !htab->sgotplt)
2266 if ((htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got")) == NULL)
2267 htab->srelgot = bfd_make_section_anyway (dynobj, ".rela.got");
2268 if (htab->srelgot == NULL
2269 || ! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC
2273 | SEC_LINKER_CREATED
2275 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
2281 update_local_sym_info (bfd *abfd,
2282 Elf_Internal_Shdr *symtab_hdr,
2283 unsigned long r_symndx,
2284 unsigned int tls_type)
2286 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2287 unsigned char *local_got_tls_masks;
2289 if (local_got_refcounts == NULL)
2291 bfd_size_type size = symtab_hdr->sh_info;
2293 size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks));
2294 local_got_refcounts = bfd_zalloc (abfd, size);
2295 if (local_got_refcounts == NULL)
2297 elf_local_got_refcounts (abfd) = local_got_refcounts;
2300 local_got_tls_masks =
2301 (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info);
2302 local_got_tls_masks[r_symndx] |= tls_type;
2303 local_got_refcounts[r_symndx] += 1;
2307 /* Look through the relocs for a section during the first phase. */
2310 microblaze_elf_check_relocs (bfd * abfd,
2311 struct bfd_link_info * info,
2313 const Elf_Internal_Rela * relocs)
2315 Elf_Internal_Shdr * symtab_hdr;
2316 struct elf_link_hash_entry ** sym_hashes;
2317 struct elf_link_hash_entry ** sym_hashes_end;
2318 const Elf_Internal_Rela * rel;
2319 const Elf_Internal_Rela * rel_end;
2320 struct elf32_mb_link_hash_table *htab;
2321 asection *sreloc = NULL;
2323 if (bfd_link_relocatable (info))
2326 htab = elf32_mb_hash_table (info);
2330 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
2331 sym_hashes = elf_sym_hashes (abfd);
2332 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
2333 if (!elf_bad_symtab (abfd))
2334 sym_hashes_end -= symtab_hdr->sh_info;
2336 rel_end = relocs + sec->reloc_count;
2338 for (rel = relocs; rel < rel_end; rel++)
2340 unsigned int r_type;
2341 struct elf_link_hash_entry * h;
2342 unsigned long r_symndx;
2343 unsigned char tls_type = 0;
2345 r_symndx = ELF32_R_SYM (rel->r_info);
2346 r_type = ELF32_R_TYPE (rel->r_info);
2348 if (r_symndx < symtab_hdr->sh_info)
2352 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
2354 /* PR15323, ref flags aren't set for references in the same
2356 h->root.non_ir_ref = 1;
2361 /* This relocation describes the C++ object vtable hierarchy.
2362 Reconstruct it for later use during GC. */
2363 case R_MICROBLAZE_GNU_VTINHERIT:
2364 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2368 /* This relocation describes which C++ vtable entries are actually
2369 used. Record for later use during GC. */
2370 case R_MICROBLAZE_GNU_VTENTRY:
2371 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2375 /* This relocation requires .plt entry. */
2376 case R_MICROBLAZE_PLT_64:
2380 h->plt.refcount += 1;
2384 /* This relocation requires .got entry. */
2385 case R_MICROBLAZE_TLSGD:
2386 tls_type |= (TLS_TLS | TLS_GD);
2388 case R_MICROBLAZE_TLSLD:
2389 tls_type |= (TLS_TLS | TLS_LD);
2392 sec->has_tls_reloc = 1;
2394 case R_MICROBLAZE_GOT_64:
2395 if (htab->sgot == NULL)
2397 if (htab->elf.dynobj == NULL)
2398 htab->elf.dynobj = abfd;
2399 if (!create_got_section (htab->elf.dynobj, info))
2404 h->got.refcount += 1;
2405 elf32_mb_hash_entry (h)->tls_mask |= tls_type;
2409 if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) )
2414 case R_MICROBLAZE_64:
2415 case R_MICROBLAZE_64_PCREL:
2416 case R_MICROBLAZE_32:
2418 if (h != NULL && !bfd_link_pic (info))
2420 /* we may need a copy reloc. */
2423 /* we may also need a .plt entry. */
2424 h->plt.refcount += 1;
2425 if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL)
2426 h->pointer_equality_needed = 1;
2430 /* If we are creating a shared library, and this is a reloc
2431 against a global symbol, or a non PC relative reloc
2432 against a local symbol, then we need to copy the reloc
2433 into the shared library. However, if we are linking with
2434 -Bsymbolic, we do not need to copy a reloc against a
2435 global symbol which is defined in an object we are
2436 including in the link (i.e., DEF_REGULAR is set). At
2437 this point we have not seen all the input files, so it is
2438 possible that DEF_REGULAR is not set now but will be set
2439 later (it is never cleared). In case of a weak definition,
2440 DEF_REGULAR may be cleared later by a strong definition in
2441 a shared library. We account for that possibility below by
2442 storing information in the relocs_copied field of the hash
2443 table entry. A similar situation occurs when creating
2444 shared libraries and symbol visibility changes render the
2447 If on the other hand, we are creating an executable, we
2448 may need to keep relocations for symbols satisfied by a
2449 dynamic library if we manage to avoid copy relocs for the
2452 if ((bfd_link_pic (info)
2453 && (sec->flags & SEC_ALLOC) != 0
2454 && (r_type != R_MICROBLAZE_64_PCREL
2456 && (! info->symbolic
2457 || h->root.type == bfd_link_hash_defweak
2458 || !h->def_regular))))
2459 || (!bfd_link_pic (info)
2460 && (sec->flags & SEC_ALLOC) != 0
2462 && (h->root.type == bfd_link_hash_defweak
2463 || !h->def_regular)))
2465 struct elf32_mb_dyn_relocs *p;
2466 struct elf32_mb_dyn_relocs **head;
2468 /* When creating a shared object, we must copy these
2469 relocs into the output file. We create a reloc
2470 section in dynobj and make room for the reloc. */
2476 if (htab->elf.dynobj == NULL)
2477 htab->elf.dynobj = abfd;
2478 dynobj = htab->elf.dynobj;
2480 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj,
2486 /* If this is a global symbol, we count the number of
2487 relocations we need for this symbol. */
2489 head = &((struct elf32_mb_link_hash_entry *) h)->dyn_relocs;
2492 /* Track dynamic relocs needed for local syms too.
2493 We really need local syms available to do this
2497 Elf_Internal_Sym *isym;
2500 isym = bfd_sym_from_r_symndx (&htab->sym_sec,
2505 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2509 vpp = &elf_section_data (s)->local_dynrel;
2510 head = (struct elf32_mb_dyn_relocs **) vpp;
2514 if (p == NULL || p->sec != sec)
2516 bfd_size_type amt = sizeof *p;
2517 p = ((struct elf32_mb_dyn_relocs *)
2518 bfd_alloc (htab->elf.dynobj, amt));
2529 if (r_type == R_MICROBLAZE_64_PCREL)
2541 microblaze_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
2543 struct elf32_mb_link_hash_table *htab;
2545 htab = elf32_mb_hash_table (info);
2549 if (!htab->sgot && !create_got_section (dynobj, info))
2552 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
2555 htab->splt = bfd_get_linker_section (dynobj, ".plt");
2556 htab->srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
2557 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
2558 if (!bfd_link_pic (info))
2559 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
2561 if (!htab->splt || !htab->srelplt || !htab->sdynbss
2562 || (!bfd_link_pic (info) && !htab->srelbss))
2568 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2571 microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info,
2572 struct elf_link_hash_entry *dir,
2573 struct elf_link_hash_entry *ind)
2575 struct elf32_mb_link_hash_entry *edir, *eind;
2577 edir = (struct elf32_mb_link_hash_entry *) dir;
2578 eind = (struct elf32_mb_link_hash_entry *) ind;
2580 if (eind->dyn_relocs != NULL)
2582 if (edir->dyn_relocs != NULL)
2584 struct elf32_mb_dyn_relocs **pp;
2585 struct elf32_mb_dyn_relocs *p;
2587 if (ind->root.type == bfd_link_hash_indirect)
2590 /* Add reloc counts against the weak sym to the strong sym
2591 list. Merge any entries against the same section. */
2592 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2594 struct elf32_mb_dyn_relocs *q;
2596 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2597 if (q->sec == p->sec)
2599 q->pc_count += p->pc_count;
2600 q->count += p->count;
2607 *pp = edir->dyn_relocs;
2610 edir->dyn_relocs = eind->dyn_relocs;
2611 eind->dyn_relocs = NULL;
2614 edir->tls_mask |= eind->tls_mask;
2616 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2620 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2621 struct elf_link_hash_entry *h)
2623 struct elf32_mb_link_hash_table *htab;
2624 struct elf32_mb_link_hash_entry * eh;
2625 struct elf32_mb_dyn_relocs *p;
2626 asection *sdynbss, *s;
2627 unsigned int power_of_two;
2630 htab = elf32_mb_hash_table (info);
2634 /* If this is a function, put it in the procedure linkage table. We
2635 will fill in the contents of the procedure linkage table later,
2636 when we know the address of the .got section. */
2637 if (h->type == STT_FUNC
2640 if (h->plt.refcount <= 0
2641 || SYMBOL_CALLS_LOCAL (info, h)
2642 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2643 && h->root.type == bfd_link_hash_undefweak))
2645 /* This case can occur if we saw a PLT reloc in an input
2646 file, but the symbol was never referred to by a dynamic
2647 object, or if all references were garbage collected. In
2648 such a case, we don't actually need to build a procedure
2649 linkage table, and we can just do a PC32 reloc instead. */
2650 h->plt.offset = (bfd_vma) -1;
2657 /* It's possible that we incorrectly decided a .plt reloc was
2658 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2659 check_relocs. We can't decide accurately between function and
2660 non-function syms in check-relocs; Objects loaded later in
2661 the link may change h->type. So fix it now. */
2662 h->plt.offset = (bfd_vma) -1;
2664 /* If this is a weak symbol, and there is a real definition, the
2665 processor independent code will have arranged for us to see the
2666 real definition first, and we can just use the same value. */
2667 if (h->u.weakdef != NULL)
2669 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2670 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2671 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2672 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2676 /* This is a reference to a symbol defined by a dynamic object which
2677 is not a function. */
2679 /* If we are creating a shared library, we must presume that the
2680 only references to the symbol are via the global offset table.
2681 For such cases we need not do anything here; the relocations will
2682 be handled correctly by relocate_section. */
2683 if (bfd_link_pic (info))
2686 /* If there are no references to this symbol that do not use the
2687 GOT, we don't need to generate a copy reloc. */
2688 if (!h->non_got_ref)
2691 /* If -z nocopyreloc was given, we won't generate them either. */
2692 if (info->nocopyreloc)
2698 eh = (struct elf32_mb_link_hash_entry *) h;
2699 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2701 s = p->sec->output_section;
2702 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2706 /* If we didn't find any dynamic relocs in read-only sections, then
2707 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2714 /* We must allocate the symbol in our .dynbss section, which will
2715 become part of the .bss section of the executable. There will be
2716 an entry for this symbol in the .dynsym section. The dynamic
2717 object will contain position independent code, so all references
2718 from the dynamic object to this symbol will go through the global
2719 offset table. The dynamic linker will use the .dynsym entry to
2720 determine the address it must put in the global offset table, so
2721 both the dynamic object and the regular object will refer to the
2722 same memory location for the variable. */
2724 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2725 to copy the initial value out of the dynamic object and into the
2726 runtime process image. */
2727 dynobj = elf_hash_table (info)->dynobj;
2728 BFD_ASSERT (dynobj != NULL);
2729 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2731 htab->srelbss->size += sizeof (Elf32_External_Rela);
2735 /* We need to figure out the alignment required for this symbol. I
2736 have no idea how ELF linkers handle this. */
2737 power_of_two = bfd_log2 (h->size);
2738 if (power_of_two > 3)
2741 sdynbss = htab->sdynbss;
2742 /* Apply the required alignment. */
2743 sdynbss->size = BFD_ALIGN (sdynbss->size, (bfd_size_type) (1 << power_of_two));
2744 if (power_of_two > bfd_get_section_alignment (dynobj, sdynbss))
2746 if (! bfd_set_section_alignment (dynobj, sdynbss, power_of_two))
2750 /* Define the symbol as being at this point in the section. */
2751 h->root.u.def.section = sdynbss;
2752 h->root.u.def.value = sdynbss->size;
2754 /* Increment the section size to make room for the symbol. */
2755 sdynbss->size += h->size;
2759 /* Allocate space in .plt, .got and associated reloc sections for
2763 allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat)
2765 struct bfd_link_info *info;
2766 struct elf32_mb_link_hash_table *htab;
2767 struct elf32_mb_link_hash_entry *eh;
2768 struct elf32_mb_dyn_relocs *p;
2770 if (h->root.type == bfd_link_hash_indirect)
2773 info = (struct bfd_link_info *) dat;
2774 htab = elf32_mb_hash_table (info);
2778 if (htab->elf.dynamic_sections_created
2779 && h->plt.refcount > 0)
2781 /* Make sure this symbol is output as a dynamic symbol.
2782 Undefined weak syms won't yet be marked as dynamic. */
2783 if (h->dynindx == -1
2784 && !h->forced_local)
2786 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2790 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
2792 asection *s = htab->splt;
2794 /* The first entry in .plt is reserved. */
2796 s->size = PLT_ENTRY_SIZE;
2798 h->plt.offset = s->size;
2800 /* If this symbol is not defined in a regular file, and we are
2801 not generating a shared library, then set the symbol to this
2802 location in the .plt. This is required to make function
2803 pointers compare as equal between the normal executable and
2804 the shared library. */
2805 if (! bfd_link_pic (info)
2808 h->root.u.def.section = s;
2809 h->root.u.def.value = h->plt.offset;
2812 /* Make room for this entry. */
2813 s->size += PLT_ENTRY_SIZE;
2815 /* We also need to make an entry in the .got.plt section, which
2816 will be placed in the .got section by the linker script. */
2817 htab->sgotplt->size += 4;
2819 /* We also need to make an entry in the .rel.plt section. */
2820 htab->srelplt->size += sizeof (Elf32_External_Rela);
2824 h->plt.offset = (bfd_vma) -1;
2830 h->plt.offset = (bfd_vma) -1;
2834 eh = (struct elf32_mb_link_hash_entry *) h;
2835 if (h->got.refcount > 0)
2840 /* Make sure this symbol is output as a dynamic symbol.
2841 Undefined weak syms won't yet be marked as dynamic. */
2842 if (h->dynindx == -1
2843 && !h->forced_local)
2845 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2850 if ((eh->tls_mask & TLS_TLS) != 0)
2852 /* Handle TLS Symbol */
2853 if ((eh->tls_mask & TLS_LD) != 0)
2855 if (!eh->elf.def_dynamic)
2856 /* We'll just use htab->tlsld_got.offset. This should
2857 always be the case. It's a little odd if we have
2858 a local dynamic reloc against a non-local symbol. */
2859 htab->tlsld_got.refcount += 1;
2863 if ((eh->tls_mask & TLS_GD) != 0)
2868 /* Regular (non-TLS) symbol */
2873 h->got.offset = (bfd_vma) -1;
2878 h->got.offset = s->size;
2880 htab->srelgot->size += need * (sizeof (Elf32_External_Rela) / 4);
2884 h->got.offset = (bfd_vma) -1;
2886 if (eh->dyn_relocs == NULL)
2889 /* In the shared -Bsymbolic case, discard space allocated for
2890 dynamic pc-relative relocs against symbols which turn out to be
2891 defined in regular objects. For the normal shared case, discard
2892 space for pc-relative relocs that have become local due to symbol
2893 visibility changes. */
2895 if (bfd_link_pic (info))
2901 struct elf32_mb_dyn_relocs **pp;
2903 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2905 p->count -= p->pc_count;
2916 /* For the non-shared case, discard space for relocs against
2917 symbols which turn out to need copy relocs or are not
2923 || (htab->elf.dynamic_sections_created
2924 && (h->root.type == bfd_link_hash_undefweak
2925 || h->root.type == bfd_link_hash_undefined))))
2927 /* Make sure this symbol is output as a dynamic symbol.
2928 Undefined weak syms won't yet be marked as dynamic. */
2929 if (h->dynindx == -1
2930 && !h->forced_local)
2932 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2936 /* If that succeeded, we know we'll be keeping all the
2938 if (h->dynindx != -1)
2942 eh->dyn_relocs = NULL;
2947 /* Finally, allocate space. */
2948 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2950 asection *sreloc = elf_section_data (p->sec)->sreloc;
2951 sreloc->size += p->count * sizeof (Elf32_External_Rela);
2957 /* Set the sizes of the dynamic sections. */
2960 microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2961 struct bfd_link_info *info)
2963 struct elf32_mb_link_hash_table *htab;
2968 htab = elf32_mb_hash_table (info);
2972 dynobj = htab->elf.dynobj;
2973 BFD_ASSERT (dynobj != NULL);
2975 /* Set up .got offsets for local syms, and space for local dynamic
2977 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2979 bfd_signed_vma *local_got;
2980 bfd_signed_vma *end_local_got;
2981 bfd_size_type locsymcount;
2982 Elf_Internal_Shdr *symtab_hdr;
2983 unsigned char *lgot_masks;
2986 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2989 for (s = ibfd->sections; s != NULL; s = s->next)
2991 struct elf32_mb_dyn_relocs *p;
2993 for (p = ((struct elf32_mb_dyn_relocs *)
2994 elf_section_data (s)->local_dynrel);
2998 if (!bfd_is_abs_section (p->sec)
2999 && bfd_is_abs_section (p->sec->output_section))
3001 /* Input section has been discarded, either because
3002 it is a copy of a linkonce section or due to
3003 linker script /DISCARD/, so we'll be discarding
3006 else if (p->count != 0)
3008 srel = elf_section_data (p->sec)->sreloc;
3009 srel->size += p->count * sizeof (Elf32_External_Rela);
3010 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
3011 info->flags |= DF_TEXTREL;
3016 local_got = elf_local_got_refcounts (ibfd);
3020 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3021 locsymcount = symtab_hdr->sh_info;
3022 end_local_got = local_got + locsymcount;
3023 lgot_masks = (unsigned char *) end_local_got;
3025 srel = htab->srelgot;
3027 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3031 unsigned int need = 0;
3032 if ((*lgot_masks & TLS_TLS) != 0)
3034 if ((*lgot_masks & TLS_GD) != 0)
3036 if ((*lgot_masks & TLS_LD) != 0)
3037 htab->tlsld_got.refcount += 1;
3044 *local_got = (bfd_vma) -1;
3048 *local_got = s->size;
3050 if (bfd_link_pic (info))
3051 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
3055 *local_got = (bfd_vma) -1;
3059 /* Allocate global sym .plt and .got entries, and space for global
3060 sym dynamic relocs. */
3061 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
3063 if (htab->tlsld_got.refcount > 0)
3065 htab->tlsld_got.offset = htab->sgot->size;
3066 htab->sgot->size += 8;
3067 if (bfd_link_pic (info))
3068 htab->srelgot->size += sizeof (Elf32_External_Rela);
3071 htab->tlsld_got.offset = (bfd_vma) -1;
3073 if (elf_hash_table (info)->dynamic_sections_created)
3075 /* Make space for the trailing nop in .plt. */
3076 if (htab->splt->size > 0)
3077 htab->splt->size += 4;
3080 /* The check_relocs and adjust_dynamic_symbol entry points have
3081 determined the sizes of the various dynamic sections. Allocate
3083 for (s = dynobj->sections; s != NULL; s = s->next)
3086 bfd_boolean strip = FALSE;
3088 if ((s->flags & SEC_LINKER_CREATED) == 0)
3091 /* It's OK to base decisions on the section name, because none
3092 of the dynobj section names depend upon the input files. */
3093 name = bfd_get_section_name (dynobj, s);
3095 if (strncmp (name, ".rela", 5) == 0)
3099 /* If we don't need this section, strip it from the
3100 output file. This is to handle .rela.bss and
3101 .rela.plt. We must create it in
3102 create_dynamic_sections, because it must be created
3103 before the linker maps input sections to output
3104 sections. The linker does that before
3105 adjust_dynamic_symbol is called, and it is that
3106 function which decides whether anything needs to go
3107 into these sections. */
3112 /* We use the reloc_count field as a counter if we need
3113 to copy relocs into the output file. */
3117 else if (s != htab->splt && s != htab->sgot && s != htab->sgotplt)
3119 /* It's not one of our sections, so don't allocate space. */
3125 s->flags |= SEC_EXCLUDE;
3129 /* Allocate memory for the section contents. */
3130 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3131 Unused entries should be reclaimed before the section's contents
3132 are written out, but at the moment this does not happen. Thus in
3133 order to prevent writing out garbage, we initialise the section's
3134 contents to zero. */
3135 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3136 if (s->contents == NULL && s->size != 0)
3140 if (elf_hash_table (info)->dynamic_sections_created)
3142 /* Add some entries to the .dynamic section. We fill in the
3143 values later, in microblaze_elf_finish_dynamic_sections, but we
3144 must add the entries now so that we get the correct size for
3145 the .dynamic section. The DT_DEBUG entry is filled in by the
3146 dynamic linker and used by the debugger. */
3147 #define add_dynamic_entry(TAG, VAL) \
3148 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3150 if (bfd_link_executable (info))
3152 if (!add_dynamic_entry (DT_DEBUG, 0))
3156 if (!add_dynamic_entry (DT_RELA, 0)
3157 || !add_dynamic_entry (DT_RELASZ, 0)
3158 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3161 if (htab->splt->size != 0)
3163 if (!add_dynamic_entry (DT_PLTGOT, 0)
3164 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3165 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3166 || !add_dynamic_entry (DT_JMPREL, 0)
3167 || !add_dynamic_entry (DT_BIND_NOW, 1))
3171 if (info->flags & DF_TEXTREL)
3173 if (!add_dynamic_entry (DT_TEXTREL, 0))
3177 #undef add_dynamic_entry
3181 /* Finish up dynamic symbol handling. We set the contents of various
3182 dynamic sections here. */
3185 microblaze_elf_finish_dynamic_symbol (bfd *output_bfd,
3186 struct bfd_link_info *info,
3187 struct elf_link_hash_entry *h,
3188 Elf_Internal_Sym *sym)
3190 struct elf32_mb_link_hash_table *htab;
3191 struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h);
3193 htab = elf32_mb_hash_table (info);
3197 if (h->plt.offset != (bfd_vma) -1)
3202 Elf_Internal_Rela rela;
3208 /* This symbol has an entry in the procedure linkage table. Set
3210 BFD_ASSERT (h->dynindx != -1);
3213 srela = htab->srelplt;
3214 sgotplt = htab->sgotplt;
3215 BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL);
3217 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */
3218 got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */
3219 got_addr = got_offset;
3221 /* For non-PIC objects we need absolute address of the GOT entry. */
3222 if (!bfd_link_pic (info))
3223 got_addr += htab->sgotplt->output_section->vma + sgotplt->output_offset;
3225 /* Fill in the entry in the procedure linkage table. */
3226 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff),
3227 splt->contents + h->plt.offset);
3228 if (bfd_link_pic (info))
3229 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff),
3230 splt->contents + h->plt.offset + 4);
3232 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff),
3233 splt->contents + h->plt.offset + 4);
3234 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2,
3235 splt->contents + h->plt.offset + 8);
3236 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3,
3237 splt->contents + h->plt.offset + 12);
3239 /* Any additions to the .got section??? */
3240 /* bfd_put_32 (output_bfd,
3241 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3242 sgotplt->contents + got_offset); */
3244 /* Fill in the entry in the .rela.plt section. */
3245 rela.r_offset = (sgotplt->output_section->vma
3246 + sgotplt->output_offset
3248 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT);
3250 loc = srela->contents;
3251 loc += plt_index * sizeof (Elf32_External_Rela);
3252 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3254 if (!h->def_regular)
3256 /* Mark the symbol as undefined, rather than as defined in
3257 the .plt section. Zero the value. */
3258 sym->st_shndx = SHN_UNDEF;
3263 /* h->got.refcount to be checked ? */
3264 if (h->got.offset != (bfd_vma) -1 &&
3265 ! ((h->got.offset & 1) ||
3266 IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask)))
3272 /* This symbol has an entry in the global offset table. Set it
3276 srela = htab->srelgot;
3277 BFD_ASSERT (sgot != NULL && srela != NULL);
3279 offset = (sgot->output_section->vma + sgot->output_offset
3280 + (h->got.offset &~ (bfd_vma) 1));
3282 /* If this is a -Bsymbolic link, and the symbol is defined
3283 locally, we just want to emit a RELATIVE reloc. Likewise if
3284 the symbol was forced to be local because of a version file.
3285 The entry in the global offset table will already have been
3286 initialized in the relocate_section function. */
3287 if (bfd_link_pic (info)
3288 && ((info->symbolic && h->def_regular)
3289 || h->dynindx == -1))
3291 asection *sec = h->root.u.def.section;
3292 microblaze_elf_output_dynamic_relocation (output_bfd,
3293 srela, srela->reloc_count++,
3295 R_MICROBLAZE_REL, offset,
3297 + sec->output_section->vma
3298 + sec->output_offset);
3302 microblaze_elf_output_dynamic_relocation (output_bfd,
3303 srela, srela->reloc_count++,
3305 R_MICROBLAZE_GLOB_DAT,
3309 bfd_put_32 (output_bfd, (bfd_vma) 0,
3310 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
3316 Elf_Internal_Rela rela;
3319 /* This symbols needs a copy reloc. Set it up. */
3321 BFD_ASSERT (h->dynindx != -1);
3323 s = bfd_get_linker_section (htab->elf.dynobj, ".rela.bss");
3324 BFD_ASSERT (s != NULL);
3326 rela.r_offset = (h->root.u.def.value
3327 + h->root.u.def.section->output_section->vma
3328 + h->root.u.def.section->output_offset);
3329 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY);
3331 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
3332 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3335 /* Mark some specially defined symbols as absolute. */
3336 if (h == htab->elf.hdynamic
3337 || h == htab->elf.hgot
3338 || h == htab->elf.hplt)
3339 sym->st_shndx = SHN_ABS;
3345 /* Finish up the dynamic sections. */
3348 microblaze_elf_finish_dynamic_sections (bfd *output_bfd,
3349 struct bfd_link_info *info)
3352 asection *sdyn, *sgot;
3353 struct elf32_mb_link_hash_table *htab;
3355 htab = elf32_mb_hash_table (info);
3359 dynobj = htab->elf.dynobj;
3361 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3363 if (htab->elf.dynamic_sections_created)
3366 Elf32_External_Dyn *dyncon, *dynconend;
3368 splt = bfd_get_linker_section (dynobj, ".plt");
3369 BFD_ASSERT (splt != NULL && sdyn != NULL);
3371 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3372 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3373 for (; dyncon < dynconend; dyncon++)
3375 Elf_Internal_Dyn dyn;
3379 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3383 case DT_PLTGOT: name = ".got.plt"; size = FALSE; break;
3384 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
3385 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
3386 case DT_RELA: name = ".rela.dyn"; size = FALSE; break;
3387 case DT_RELASZ: name = ".rela.dyn"; size = TRUE; break;
3388 default: name = NULL; size = FALSE; break;
3395 s = bfd_get_linker_section (dynobj, name);
3401 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3403 dyn.d_un.d_val = s->size;
3405 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3409 /* Clear the first entry in the procedure linkage table,
3410 and put a nop in the last four bytes. */
3413 memset (splt->contents, 0, PLT_ENTRY_SIZE);
3414 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */,
3415 splt->contents + splt->size - 4);
3418 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
3421 /* Set the first entry in the global offset table to the address of
3422 the dynamic section. */
3423 sgot = bfd_get_linker_section (dynobj, ".got.plt");
3424 if (sgot && sgot->size > 0)
3427 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
3429 bfd_put_32 (output_bfd,
3430 sdyn->output_section->vma + sdyn->output_offset,
3432 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
3435 if (htab->sgot && htab->sgot->size > 0)
3436 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3441 /* Hook called by the linker routine which adds symbols from an object
3442 file. We use it to put .comm items in .sbss, and not .bss. */
3445 microblaze_elf_add_symbol_hook (bfd *abfd,
3446 struct bfd_link_info *info,
3447 Elf_Internal_Sym *sym,
3448 const char **namep ATTRIBUTE_UNUSED,
3449 flagword *flagsp ATTRIBUTE_UNUSED,
3453 if (sym->st_shndx == SHN_COMMON
3454 && !bfd_link_relocatable (info)
3455 && sym->st_size <= elf_gp_size (abfd))
3457 /* Common symbols less than or equal to -G nn bytes are automatically
3459 *secp = bfd_make_section_old_way (abfd, ".sbss");
3461 || ! bfd_set_section_flags (abfd, *secp, SEC_IS_COMMON))
3464 *valp = sym->st_size;
3470 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec
3471 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3473 #define TARGET_BIG_SYM microblaze_elf32_vec
3474 #define TARGET_BIG_NAME "elf32-microblaze"
3476 #define ELF_ARCH bfd_arch_microblaze
3477 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3478 #define ELF_MACHINE_CODE EM_MICROBLAZE
3479 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3480 #define ELF_MAXPAGESIZE 0x1000
3481 #define elf_info_to_howto microblaze_elf_info_to_howto
3482 #define elf_info_to_howto_rel NULL
3484 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3485 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3486 #define elf_backend_relocate_section microblaze_elf_relocate_section
3487 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3488 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
3489 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3491 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3492 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3493 #define elf_backend_check_relocs microblaze_elf_check_relocs
3494 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3495 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3496 #define elf_backend_can_gc_sections 1
3497 #define elf_backend_can_refcount 1
3498 #define elf_backend_want_got_plt 1
3499 #define elf_backend_plt_readonly 1
3500 #define elf_backend_got_header_size 12
3501 #define elf_backend_rela_normal 1
3503 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3504 #define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections
3505 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3506 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3507 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3508 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3510 #include "elf32-target.h"