1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
3 Copyright 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
30 #include "elf/microblaze.h"
33 #define USE_RELA /* Only USE_REL is actually significant, but this is
34 here are a reminder... */
35 #define INST_WORD_SIZE 4
37 static int ro_small_data_pointer
= 0;
38 static int rw_small_data_pointer
= 0;
40 static reloc_howto_type
* microblaze_elf_howto_table
[(int) R_MICROBLAZE_max
];
42 static reloc_howto_type microblaze_elf_howto_raw
[] =
44 /* This reloc does nothing. */
45 HOWTO (R_MICROBLAZE_NONE
, /* Type. */
47 2, /* Size (0 = byte, 1 = short, 2 = long). */
49 FALSE
, /* PC_relative. */
51 complain_overflow_bitfield
, /* Complain on overflow. */
52 NULL
, /* Special Function. */
53 "R_MICROBLAZE_NONE", /* Name. */
54 FALSE
, /* Partial Inplace. */
57 FALSE
), /* PC relative offset? */
59 /* A standard 32 bit relocation. */
60 HOWTO (R_MICROBLAZE_32
, /* Type. */
62 2, /* Size (0 = byte, 1 = short, 2 = long). */
64 FALSE
, /* PC_relative. */
66 complain_overflow_bitfield
, /* Complain on overflow. */
67 bfd_elf_generic_reloc
,/* Special Function. */
68 "R_MICROBLAZE_32", /* Name. */
69 FALSE
, /* Partial Inplace. */
71 0xffffffff, /* Dest Mask. */
72 FALSE
), /* PC relative offset? */
74 /* A standard PCREL 32 bit relocation. */
75 HOWTO (R_MICROBLAZE_32_PCREL
,/* Type. */
77 2, /* Size (0 = byte, 1 = short, 2 = long). */
79 TRUE
, /* PC_relative. */
81 complain_overflow_bitfield
, /* Complain on overflow. */
82 bfd_elf_generic_reloc
,/* Special Function. */
83 "R_MICROBLAZE_32_PCREL", /* Name. */
84 TRUE
, /* Partial Inplace. */
86 0xffffffff, /* Dest Mask. */
87 TRUE
), /* PC relative offset? */
89 /* A 64 bit PCREL relocation. Table-entry not really used. */
90 HOWTO (R_MICROBLAZE_64_PCREL
,/* Type. */
92 2, /* Size (0 = byte, 1 = short, 2 = long). */
94 TRUE
, /* PC_relative. */
96 complain_overflow_dont
, /* Complain on overflow. */
97 bfd_elf_generic_reloc
,/* Special Function. */
98 "R_MICROBLAZE_64_PCREL", /* Name. */
99 FALSE
, /* Partial Inplace. */
100 0, /* Source Mask. */
101 0x0000ffff, /* Dest Mask. */
102 TRUE
), /* PC relative offset? */
104 /* The low half of a PCREL 32 bit relocation. */
105 HOWTO (R_MICROBLAZE_32_PCREL_LO
, /* Type. */
107 2, /* Size (0 = byte, 1 = short, 2 = long). */
109 TRUE
, /* PC_relative. */
111 complain_overflow_signed
, /* Complain on overflow. */
112 bfd_elf_generic_reloc
, /* Special Function. */
113 "R_MICROBLAZE_32_PCREL_LO", /* Name. */
114 FALSE
, /* Partial Inplace. */
115 0, /* Source Mask. */
116 0x0000ffff, /* Dest Mask. */
117 TRUE
), /* PC relative offset? */
119 /* A 64 bit relocation. Table entry not really used. */
120 HOWTO (R_MICROBLAZE_64
, /* Type. */
122 2, /* Size (0 = byte, 1 = short, 2 = long). */
124 FALSE
, /* PC_relative. */
126 complain_overflow_dont
, /* Complain on overflow. */
127 bfd_elf_generic_reloc
,/* Special Function. */
128 "R_MICROBLAZE_64", /* Name. */
129 FALSE
, /* Partial Inplace. */
130 0, /* Source Mask. */
131 0x0000ffff, /* Dest Mask. */
132 FALSE
), /* PC relative offset? */
134 /* The low half of a 32 bit relocation. */
135 HOWTO (R_MICROBLAZE_32_LO
, /* Type. */
137 2, /* Size (0 = byte, 1 = short, 2 = long). */
139 FALSE
, /* PC_relative. */
141 complain_overflow_signed
, /* Complain on overflow. */
142 bfd_elf_generic_reloc
,/* Special Function. */
143 "R_MICROBLAZE_32_LO", /* Name. */
144 FALSE
, /* Partial Inplace. */
145 0, /* Source Mask. */
146 0x0000ffff, /* Dest Mask. */
147 FALSE
), /* PC relative offset? */
149 /* Read-only small data section relocation. */
150 HOWTO (R_MICROBLAZE_SRO32
, /* Type. */
152 2, /* Size (0 = byte, 1 = short, 2 = long). */
154 FALSE
, /* PC_relative. */
156 complain_overflow_bitfield
, /* Complain on overflow. */
157 bfd_elf_generic_reloc
,/* Special Function. */
158 "R_MICROBLAZE_SRO32", /* Name. */
159 FALSE
, /* Partial Inplace. */
160 0, /* Source Mask. */
161 0x0000ffff, /* Dest Mask. */
162 FALSE
), /* PC relative offset? */
164 /* Read-write small data area relocation. */
165 HOWTO (R_MICROBLAZE_SRW32
, /* Type. */
167 2, /* Size (0 = byte, 1 = short, 2 = long). */
169 FALSE
, /* PC_relative. */
171 complain_overflow_bitfield
, /* Complain on overflow. */
172 bfd_elf_generic_reloc
,/* Special Function. */
173 "R_MICROBLAZE_SRW32", /* Name. */
174 FALSE
, /* Partial Inplace. */
175 0, /* Source Mask. */
176 0x0000ffff, /* Dest Mask. */
177 FALSE
), /* PC relative offset? */
179 /* This reloc does nothing. Used for relaxation. */
180 HOWTO (R_MICROBLAZE_64_NONE
, /* Type. */
182 2, /* Size (0 = byte, 1 = short, 2 = long). */
184 TRUE
, /* PC_relative. */
186 complain_overflow_bitfield
, /* Complain on overflow. */
187 NULL
, /* Special Function. */
188 "R_MICROBLAZE_64_NONE",/* Name. */
189 FALSE
, /* Partial Inplace. */
190 0, /* Source Mask. */
192 FALSE
), /* PC relative offset? */
194 /* Symbol Op Symbol relocation. */
195 HOWTO (R_MICROBLAZE_32_SYM_OP_SYM
, /* Type. */
197 2, /* Size (0 = byte, 1 = short, 2 = long). */
199 FALSE
, /* PC_relative. */
201 complain_overflow_bitfield
, /* Complain on overflow. */
202 bfd_elf_generic_reloc
,/* Special Function. */
203 "R_MICROBLAZE_32_SYM_OP_SYM", /* Name. */
204 FALSE
, /* Partial Inplace. */
205 0, /* Source Mask. */
206 0xffffffff, /* Dest Mask. */
207 FALSE
), /* PC relative offset? */
209 /* GNU extension to record C++ vtable hierarchy. */
210 HOWTO (R_MICROBLAZE_GNU_VTINHERIT
, /* Type. */
212 2, /* Size (0 = byte, 1 = short, 2 = long). */
214 FALSE
, /* PC_relative. */
216 complain_overflow_dont
,/* Complain on overflow. */
217 NULL
, /* Special Function. */
218 "R_MICROBLAZE_GNU_VTINHERIT", /* Name. */
219 FALSE
, /* Partial Inplace. */
220 0, /* Source Mask. */
222 FALSE
), /* PC relative offset? */
224 /* GNU extension to record C++ vtable member usage. */
225 HOWTO (R_MICROBLAZE_GNU_VTENTRY
, /* Type. */
227 2, /* Size (0 = byte, 1 = short, 2 = long). */
229 FALSE
, /* PC_relative. */
231 complain_overflow_dont
,/* Complain on overflow. */
232 _bfd_elf_rel_vtable_reloc_fn
, /* Special Function. */
233 "R_MICROBLAZE_GNU_VTENTRY", /* Name. */
234 FALSE
, /* Partial Inplace. */
235 0, /* Source Mask. */
237 FALSE
), /* PC relative offset? */
239 /* A 64 bit GOTPC relocation. Table-entry not really used. */
240 HOWTO (R_MICROBLAZE_GOTPC_64
, /* Type. */
242 2, /* Size (0 = byte, 1 = short, 2 = long). */
244 TRUE
, /* PC_relative. */
246 complain_overflow_dont
, /* Complain on overflow. */
247 bfd_elf_generic_reloc
, /* Special Function. */
248 "R_MICROBLAZE_GOTPC_64", /* Name. */
249 FALSE
, /* Partial Inplace. */
250 0, /* Source Mask. */
251 0x0000ffff, /* Dest Mask. */
252 TRUE
), /* PC relative offset? */
254 /* A 64 bit GOT relocation. Table-entry not really used. */
255 HOWTO (R_MICROBLAZE_GOT_64
, /* Type. */
257 2, /* Size (0 = byte, 1 = short, 2 = long). */
259 FALSE
, /* PC_relative. */
261 complain_overflow_dont
, /* Complain on overflow. */
262 bfd_elf_generic_reloc
,/* Special Function. */
263 "R_MICROBLAZE_GOT_64",/* Name. */
264 FALSE
, /* Partial Inplace. */
265 0, /* Source Mask. */
266 0x0000ffff, /* Dest Mask. */
267 FALSE
), /* PC relative offset? */
269 /* A 64 bit PLT relocation. Table-entry not really used. */
270 HOWTO (R_MICROBLAZE_PLT_64
, /* Type. */
272 2, /* Size (0 = byte, 1 = short, 2 = long). */
274 TRUE
, /* PC_relative. */
276 complain_overflow_dont
, /* Complain on overflow. */
277 bfd_elf_generic_reloc
,/* Special Function. */
278 "R_MICROBLAZE_PLT_64",/* Name. */
279 FALSE
, /* Partial Inplace. */
280 0, /* Source Mask. */
281 0x0000ffff, /* Dest Mask. */
282 TRUE
), /* PC relative offset? */
284 /* Table-entry not really used. */
285 HOWTO (R_MICROBLAZE_REL
, /* Type. */
287 2, /* Size (0 = byte, 1 = short, 2 = long). */
289 TRUE
, /* PC_relative. */
291 complain_overflow_dont
, /* Complain on overflow. */
292 bfd_elf_generic_reloc
,/* Special Function. */
293 "R_MICROBLAZE_REL", /* Name. */
294 FALSE
, /* Partial Inplace. */
295 0, /* Source Mask. */
296 0x0000ffff, /* Dest Mask. */
297 TRUE
), /* PC relative offset? */
299 /* Table-entry not really used. */
300 HOWTO (R_MICROBLAZE_JUMP_SLOT
,/* Type. */
302 2, /* Size (0 = byte, 1 = short, 2 = long). */
304 TRUE
, /* PC_relative. */
306 complain_overflow_dont
, /* Complain on overflow. */
307 bfd_elf_generic_reloc
,/* Special Function. */
308 "R_MICROBLAZE_JUMP_SLOT", /* Name. */
309 FALSE
, /* Partial Inplace. */
310 0, /* Source Mask. */
311 0x0000ffff, /* Dest Mask. */
312 TRUE
), /* PC relative offset? */
314 /* Table-entry not really used. */
315 HOWTO (R_MICROBLAZE_GLOB_DAT
,/* Type. */
317 2, /* Size (0 = byte, 1 = short, 2 = long). */
319 TRUE
, /* PC_relative. */
321 complain_overflow_dont
, /* Complain on overflow. */
322 bfd_elf_generic_reloc
,/* Special Function. */
323 "R_MICROBLAZE_GLOB_DAT", /* Name. */
324 FALSE
, /* Partial Inplace. */
325 0, /* Source Mask. */
326 0x0000ffff, /* Dest Mask. */
327 TRUE
), /* PC relative offset? */
329 /* A 64 bit GOT relative relocation. Table-entry not really used. */
330 HOWTO (R_MICROBLAZE_GOTOFF_64
, /* Type. */
332 2, /* Size (0 = byte, 1 = short, 2 = long). */
334 FALSE
, /* PC_relative. */
336 complain_overflow_dont
, /* Complain on overflow. */
337 bfd_elf_generic_reloc
,/* Special Function. */
338 "R_MICROBLAZE_GOTOFF_64", /* Name. */
339 FALSE
, /* Partial Inplace. */
340 0, /* Source Mask. */
341 0x0000ffff, /* Dest Mask. */
342 FALSE
), /* PC relative offset? */
344 /* A 32 bit GOT relative relocation. Table-entry not really used. */
345 HOWTO (R_MICROBLAZE_GOTOFF_32
, /* Type. */
347 2, /* Size (0 = byte, 1 = short, 2 = long). */
349 FALSE
, /* PC_relative. */
351 complain_overflow_dont
, /* Complain on overflow. */
352 bfd_elf_generic_reloc
, /* Special Function. */
353 "R_MICROBLAZE_GOTOFF_32", /* Name. */
354 FALSE
, /* Partial Inplace. */
355 0, /* Source Mask. */
356 0x0000ffff, /* Dest Mask. */
357 FALSE
), /* PC relative offset? */
359 /* COPY relocation. Table-entry not really used. */
360 HOWTO (R_MICROBLAZE_COPY
, /* Type. */
362 2, /* Size (0 = byte, 1 = short, 2 = long). */
364 FALSE
, /* PC_relative. */
366 complain_overflow_dont
, /* Complain on overflow. */
367 bfd_elf_generic_reloc
,/* Special Function. */
368 "R_MICROBLAZE_COPY", /* Name. */
369 FALSE
, /* Partial Inplace. */
370 0, /* Source Mask. */
371 0x0000ffff, /* Dest Mask. */
372 FALSE
), /* PC relative offset? */
374 /* Marker relocs for TLS. */
375 HOWTO (R_MICROBLAZE_TLS
,
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 FALSE
, /* pc_relative */
381 complain_overflow_dont
, /* complain_on_overflow */
382 bfd_elf_generic_reloc
, /* special_function */
383 "R_MICROBLAZE_TLS", /* name */
384 FALSE
, /* partial_inplace */
386 0x0000ffff, /* dst_mask */
387 FALSE
), /* pcrel_offset */
389 HOWTO (R_MICROBLAZE_TLSGD
,
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_dont
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 "R_MICROBLAZE_TLSGD", /* name */
398 FALSE
, /* partial_inplace */
400 0x0000ffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
403 HOWTO (R_MICROBLAZE_TLSLD
,
405 2, /* size (0 = byte, 1 = short, 2 = long) */
407 FALSE
, /* pc_relative */
409 complain_overflow_dont
, /* complain_on_overflow */
410 bfd_elf_generic_reloc
, /* special_function */
411 "R_MICROBLAZE_TLSLD", /* name */
412 FALSE
, /* partial_inplace */
414 0x0000ffff, /* dst_mask */
415 FALSE
), /* pcrel_offset */
417 /* Computes the load module index of the load module that contains the
418 definition of its TLS sym. */
419 HOWTO (R_MICROBLAZE_TLSDTPMOD32
,
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 FALSE
, /* pc_relative */
425 complain_overflow_dont
, /* complain_on_overflow */
426 bfd_elf_generic_reloc
, /* special_function */
427 "R_MICROBLAZE_TLSDTPMOD32", /* name */
428 FALSE
, /* partial_inplace */
430 0x0000ffff, /* dst_mask */
431 FALSE
), /* pcrel_offset */
433 /* Computes a dtv-relative displacement, the difference between the value
434 of sym+add and the base address of the thread-local storage block that
435 contains the definition of sym, minus 0x8000. Used for initializing GOT */
436 HOWTO (R_MICROBLAZE_TLSDTPREL32
,
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 FALSE
, /* pc_relative */
442 complain_overflow_dont
, /* complain_on_overflow */
443 bfd_elf_generic_reloc
, /* special_function */
444 "R_MICROBLAZE_TLSDTPREL32", /* name */
445 FALSE
, /* partial_inplace */
447 0x0000ffff, /* dst_mask */
448 FALSE
), /* pcrel_offset */
450 /* Computes a dtv-relative displacement, the difference between the value
451 of sym+add and the base address of the thread-local storage block that
452 contains the definition of sym, minus 0x8000. */
453 HOWTO (R_MICROBLAZE_TLSDTPREL64
,
455 2, /* size (0 = byte, 1 = short, 2 = long) */
457 FALSE
, /* pc_relative */
459 complain_overflow_dont
, /* complain_on_overflow */
460 bfd_elf_generic_reloc
, /* special_function */
461 "R_MICROBLAZE_TLSDTPREL64", /* name */
462 FALSE
, /* partial_inplace */
464 0x0000ffff, /* dst_mask */
465 FALSE
), /* pcrel_offset */
467 /* Computes a tp-relative displacement, the difference between the value of
468 sym+add and the value of the thread pointer (r13). */
469 HOWTO (R_MICROBLAZE_TLSGOTTPREL32
,
471 2, /* size (0 = byte, 1 = short, 2 = long) */
473 FALSE
, /* pc_relative */
475 complain_overflow_dont
, /* complain_on_overflow */
476 bfd_elf_generic_reloc
, /* special_function */
477 "R_MICROBLAZE_TLSGOTTPREL32", /* name */
478 FALSE
, /* partial_inplace */
480 0x0000ffff, /* dst_mask */
481 FALSE
), /* pcrel_offset */
483 /* Computes a tp-relative displacement, the difference between the value of
484 sym+add and the value of the thread pointer (r13). */
485 HOWTO (R_MICROBLAZE_TLSTPREL32
,
487 2, /* size (0 = byte, 1 = short, 2 = long) */
489 FALSE
, /* pc_relative */
491 complain_overflow_dont
, /* complain_on_overflow */
492 bfd_elf_generic_reloc
, /* special_function */
493 "R_MICROBLAZE_TLSTPREL32", /* name */
494 FALSE
, /* partial_inplace */
496 0x0000ffff, /* dst_mask */
497 FALSE
), /* pcrel_offset */
502 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
505 /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */
508 microblaze_elf_howto_init (void)
512 for (i
= NUM_ELEM (microblaze_elf_howto_raw
); i
--;)
516 type
= microblaze_elf_howto_raw
[i
].type
;
518 BFD_ASSERT (type
< NUM_ELEM (microblaze_elf_howto_table
));
520 microblaze_elf_howto_table
[type
] = & microblaze_elf_howto_raw
[i
];
524 static reloc_howto_type
*
525 microblaze_elf_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
526 bfd_reloc_code_real_type code
)
528 enum elf_microblaze_reloc_type microblaze_reloc
= R_MICROBLAZE_NONE
;
533 microblaze_reloc
= R_MICROBLAZE_NONE
;
535 case BFD_RELOC_MICROBLAZE_64_NONE
:
536 microblaze_reloc
= R_MICROBLAZE_64_NONE
;
539 microblaze_reloc
= R_MICROBLAZE_32
;
541 /* RVA is treated the same as 32 */
543 microblaze_reloc
= R_MICROBLAZE_32
;
545 case BFD_RELOC_32_PCREL
:
546 microblaze_reloc
= R_MICROBLAZE_32_PCREL
;
548 case BFD_RELOC_64_PCREL
:
549 microblaze_reloc
= R_MICROBLAZE_64_PCREL
;
551 case BFD_RELOC_MICROBLAZE_32_LO_PCREL
:
552 microblaze_reloc
= R_MICROBLAZE_32_PCREL_LO
;
555 microblaze_reloc
= R_MICROBLAZE_64
;
557 case BFD_RELOC_MICROBLAZE_32_LO
:
558 microblaze_reloc
= R_MICROBLAZE_32_LO
;
560 case BFD_RELOC_MICROBLAZE_32_ROSDA
:
561 microblaze_reloc
= R_MICROBLAZE_SRO32
;
563 case BFD_RELOC_MICROBLAZE_32_RWSDA
:
564 microblaze_reloc
= R_MICROBLAZE_SRW32
;
566 case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM
:
567 microblaze_reloc
= R_MICROBLAZE_32_SYM_OP_SYM
;
569 case BFD_RELOC_VTABLE_INHERIT
:
570 microblaze_reloc
= R_MICROBLAZE_GNU_VTINHERIT
;
572 case BFD_RELOC_VTABLE_ENTRY
:
573 microblaze_reloc
= R_MICROBLAZE_GNU_VTENTRY
;
575 case BFD_RELOC_MICROBLAZE_64_GOTPC
:
576 microblaze_reloc
= R_MICROBLAZE_GOTPC_64
;
578 case BFD_RELOC_MICROBLAZE_64_GOT
:
579 microblaze_reloc
= R_MICROBLAZE_GOT_64
;
581 case BFD_RELOC_MICROBLAZE_64_PLT
:
582 microblaze_reloc
= R_MICROBLAZE_PLT_64
;
584 case BFD_RELOC_MICROBLAZE_64_GOTOFF
:
585 microblaze_reloc
= R_MICROBLAZE_GOTOFF_64
;
587 case BFD_RELOC_MICROBLAZE_32_GOTOFF
:
588 microblaze_reloc
= R_MICROBLAZE_GOTOFF_32
;
590 case BFD_RELOC_MICROBLAZE_64_TLSGD
:
591 microblaze_reloc
= R_MICROBLAZE_TLSGD
;
593 case BFD_RELOC_MICROBLAZE_64_TLSLD
:
594 microblaze_reloc
= R_MICROBLAZE_TLSLD
;
596 case BFD_RELOC_MICROBLAZE_32_TLSDTPREL
:
597 microblaze_reloc
= R_MICROBLAZE_TLSDTPREL32
;
599 case BFD_RELOC_MICROBLAZE_64_TLSDTPREL
:
600 microblaze_reloc
= R_MICROBLAZE_TLSDTPREL64
;
602 case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD
:
603 microblaze_reloc
= R_MICROBLAZE_TLSDTPMOD32
;
605 case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL
:
606 microblaze_reloc
= R_MICROBLAZE_TLSGOTTPREL32
;
608 case BFD_RELOC_MICROBLAZE_64_TLSTPREL
:
609 microblaze_reloc
= R_MICROBLAZE_TLSTPREL32
;
611 case BFD_RELOC_MICROBLAZE_COPY
:
612 microblaze_reloc
= R_MICROBLAZE_COPY
;
615 return (reloc_howto_type
*) NULL
;
618 if (!microblaze_elf_howto_table
[R_MICROBLAZE_32
])
619 /* Initialize howto table if needed. */
620 microblaze_elf_howto_init ();
622 return microblaze_elf_howto_table
[(int) microblaze_reloc
];
625 static reloc_howto_type
*
626 microblaze_elf_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
631 for (i
= 0; i
< NUM_ELEM (microblaze_elf_howto_raw
); i
++)
632 if (microblaze_elf_howto_raw
[i
].name
!= NULL
633 && strcasecmp (microblaze_elf_howto_raw
[i
].name
, r_name
) == 0)
634 return µblaze_elf_howto_raw
[i
];
639 /* Set the howto pointer for a RCE ELF reloc. */
642 microblaze_elf_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
,
644 Elf_Internal_Rela
* dst
)
646 if (!microblaze_elf_howto_table
[R_MICROBLAZE_32
])
647 /* Initialize howto table if needed. */
648 microblaze_elf_howto_init ();
650 BFD_ASSERT (ELF32_R_TYPE (dst
->r_info
) < (unsigned int) R_MICROBLAZE_max
);
652 cache_ptr
->howto
= microblaze_elf_howto_table
[ELF32_R_TYPE (dst
->r_info
)];
655 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
658 microblaze_elf_is_local_label_name (bfd
*abfd
, const char *name
)
660 if (name
[0] == 'L' && name
[1] == '.')
663 if (name
[0] == '$' && name
[1] == 'L')
666 /* With gcc, the labels go back to starting with '.', so we accept
667 the generic ELF local label syntax as well. */
668 return _bfd_elf_is_local_label_name (abfd
, name
);
671 /* The microblaze linker (like many others) needs to keep track of
672 the number of relocs that it decides to copy as dynamic relocs in
673 check_relocs for each symbol. This is so that it can later discard
674 them if they are found to be unnecessary. We store the information
675 in a field extending the regular ELF linker hash table. */
677 struct elf32_mb_dyn_relocs
679 struct elf32_mb_dyn_relocs
*next
;
681 /* The input section of the reloc. */
684 /* Total number of relocs copied for the input section. */
687 /* Number of pc-relative relocs copied for the input section. */
688 bfd_size_type pc_count
;
691 /* ELF linker hash entry. */
693 struct elf32_mb_link_hash_entry
695 struct elf_link_hash_entry elf
;
697 /* Track dynamic relocs copied for this symbol. */
698 struct elf32_mb_dyn_relocs
*dyn_relocs
;
700 /* TLS Reference Types for the symbol; Updated by check_relocs */
701 #define TLS_GD 1 /* GD reloc. */
702 #define TLS_LD 2 /* LD reloc. */
703 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
704 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
705 #define TLS_TLS 16 /* Any TLS reloc. */
706 unsigned char tls_mask
;
710 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD))
711 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD))
712 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL))
713 #define IS_TLS_NONE(x) (x == 0)
715 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
717 /* ELF linker hash table. */
719 struct elf32_mb_link_hash_table
721 struct elf_link_hash_table elf
;
723 /* Short-cuts to get to dynamic linker sections. */
732 /* Small local sym to section mapping cache. */
733 struct sym_cache sym_sec
;
735 /* TLS Local Dynamic GOT Entry */
737 bfd_signed_vma refcount
;
742 /* Nonzero if this section has TLS related relocations. */
743 #define has_tls_reloc sec_flg0
745 /* Get the ELF linker hash table from a link_info structure. */
747 #define elf32_mb_hash_table(p) \
748 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
749 == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL)
751 /* Create an entry in a microblaze ELF linker hash table. */
753 static struct bfd_hash_entry
*
754 link_hash_newfunc (struct bfd_hash_entry
*entry
,
755 struct bfd_hash_table
*table
,
758 /* Allocate the structure if it has not already been allocated by a
762 entry
= bfd_hash_allocate (table
,
763 sizeof (struct elf32_mb_link_hash_entry
));
768 /* Call the allocation method of the superclass. */
769 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
772 struct elf32_mb_link_hash_entry
*eh
;
774 eh
= (struct elf32_mb_link_hash_entry
*) entry
;
775 eh
->dyn_relocs
= NULL
;
782 /* Create a mb ELF linker hash table. */
784 static struct bfd_link_hash_table
*
785 microblaze_elf_link_hash_table_create (bfd
*abfd
)
787 struct elf32_mb_link_hash_table
*ret
;
788 bfd_size_type amt
= sizeof (struct elf32_mb_link_hash_table
);
790 ret
= (struct elf32_mb_link_hash_table
*) bfd_zmalloc (amt
);
794 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
795 sizeof (struct elf32_mb_link_hash_entry
),
796 MICROBLAZE_ELF_DATA
))
802 return &ret
->elf
.root
;
805 /* Set the values of the small data pointers. */
808 microblaze_elf_final_sdp (struct bfd_link_info
*info
)
810 struct bfd_link_hash_entry
*h
;
812 h
= bfd_link_hash_lookup (info
->hash
, RO_SDA_ANCHOR_NAME
, FALSE
, FALSE
, TRUE
);
813 if (h
!= (struct bfd_link_hash_entry
*) NULL
814 && h
->type
== bfd_link_hash_defined
)
815 ro_small_data_pointer
= (h
->u
.def
.value
816 + h
->u
.def
.section
->output_section
->vma
817 + h
->u
.def
.section
->output_offset
);
819 h
= bfd_link_hash_lookup (info
->hash
, RW_SDA_ANCHOR_NAME
, FALSE
, FALSE
, TRUE
);
820 if (h
!= (struct bfd_link_hash_entry
*) NULL
821 && h
->type
== bfd_link_hash_defined
)
822 rw_small_data_pointer
= (h
->u
.def
.value
823 + h
->u
.def
.section
->output_section
->vma
824 + h
->u
.def
.section
->output_offset
);
828 dtprel_base (struct bfd_link_info
*info
)
830 /* If tls_sec is NULL, we should have signalled an error already. */
831 if (elf_hash_table (info
)->tls_sec
== NULL
)
833 return elf_hash_table (info
)->tls_sec
->vma
;
836 /* The size of the thread control block. */
839 /* Output a simple dynamic relocation into SRELOC. */
842 microblaze_elf_output_dynamic_relocation (bfd
*output_bfd
,
844 unsigned long reloc_index
,
851 Elf_Internal_Rela rel
;
853 rel
.r_info
= ELF32_R_INFO (indx
, r_type
);
854 rel
.r_offset
= offset
;
855 rel
.r_addend
= addend
;
857 bfd_elf32_swap_reloca_out (output_bfd
, &rel
,
858 (sreloc
->contents
+ reloc_index
* sizeof (Elf32_External_Rela
)));
861 /* This code is taken from elf32-m32r.c
862 There is some attempt to make this function usable for many architectures,
863 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
864 if only to serve as a learning tool.
866 The RELOCATE_SECTION function is called by the new ELF backend linker
867 to handle the relocations for a section.
869 The relocs are always passed as Rela structures; if the section
870 actually uses Rel structures, the r_addend field will always be
873 This function is responsible for adjust the section contents as
874 necessary, and (if using Rela relocs and generating a
875 relocatable output file) adjusting the reloc addend as
878 This function does not have to worry about setting the reloc
879 address or the reloc symbol index.
881 LOCAL_SYMS is a pointer to the swapped in local symbols.
883 LOCAL_SECTIONS is an array giving the section in the input file
884 corresponding to the st_shndx field of each local symbol.
886 The global hash table entry for the global symbols can be found
887 via elf_sym_hashes (input_bfd).
889 When generating relocatable output, this function must handle
890 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
891 going to be the section symbol corresponding to the output
892 section, which means that the addend must be adjusted
896 microblaze_elf_relocate_section (bfd
*output_bfd
,
897 struct bfd_link_info
*info
,
899 asection
*input_section
,
901 Elf_Internal_Rela
*relocs
,
902 Elf_Internal_Sym
*local_syms
,
903 asection
**local_sections
)
905 struct elf32_mb_link_hash_table
*htab
;
906 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
907 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
908 Elf_Internal_Rela
*rel
, *relend
;
909 int endian
= (bfd_little_endian (output_bfd
)) ? 0 : 2;
910 /* Assume success. */
911 bfd_boolean ret
= TRUE
;
913 bfd_vma
*local_got_offsets
;
914 unsigned int tls_type
;
916 if (!microblaze_elf_howto_table
[R_MICROBLAZE_max
-1])
917 microblaze_elf_howto_init ();
919 htab
= elf32_mb_hash_table (info
);
923 local_got_offsets
= elf_local_got_offsets (input_bfd
);
925 sreloc
= elf_section_data (input_section
)->sreloc
;
928 relend
= relocs
+ input_section
->reloc_count
;
929 for (; rel
< relend
; rel
++)
932 reloc_howto_type
*howto
;
933 unsigned long r_symndx
;
934 bfd_vma addend
= rel
->r_addend
;
935 bfd_vma offset
= rel
->r_offset
;
936 struct elf_link_hash_entry
*h
;
937 Elf_Internal_Sym
*sym
;
939 const char *sym_name
;
940 bfd_reloc_status_type r
= bfd_reloc_ok
;
941 const char *errmsg
= NULL
;
942 bfd_boolean unresolved_reloc
= FALSE
;
945 r_type
= ELF32_R_TYPE (rel
->r_info
);
948 if (r_type
< 0 || r_type
>= (int) R_MICROBLAZE_max
)
950 (*_bfd_error_handler
) (_("%s: unknown relocation type %d"),
951 bfd_get_filename (input_bfd
), (int) r_type
);
952 bfd_set_error (bfd_error_bad_value
);
957 howto
= microblaze_elf_howto_table
[r_type
];
958 r_symndx
= ELF32_R_SYM (rel
->r_info
);
960 if (info
->relocatable
)
962 /* This is a relocatable link. We don't have to change
963 anything, unless the reloc is against a section symbol,
964 in which case we have to adjust according to where the
965 section symbol winds up in the output section. */
967 if (r_symndx
>= symtab_hdr
->sh_info
)
968 /* External symbol. */
972 sym
= local_syms
+ r_symndx
;
973 sym_name
= "<local symbol>";
974 /* STT_SECTION: symbol is associated with a section. */
975 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
976 /* Symbol isn't associated with a section. Nothing to do. */
979 sec
= local_sections
[r_symndx
];
980 addend
+= sec
->output_offset
+ sym
->st_value
;
982 /* This can't be done for USE_REL because it doesn't mean anything
983 and elf_link_input_bfd asserts this stays zero. */
984 /* rel->r_addend = addend; */
988 /* Addends are stored with relocs. We're done. */
991 /* If partial_inplace, we need to store any additional addend
992 back in the section. */
993 if (!howto
->partial_inplace
)
995 /* ??? Here is a nice place to call a special_function like handler. */
996 r
= _bfd_relocate_contents (howto
, input_bfd
, addend
,
1004 /* This is a final link. */
1007 unresolved_reloc
= FALSE
;
1009 if (r_symndx
< symtab_hdr
->sh_info
)
1012 sym
= local_syms
+ r_symndx
;
1013 sec
= local_sections
[r_symndx
];
1016 sym_name
= "<local symbol>";
1017 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1018 /* r_addend may have changed if the reference section was
1020 addend
= rel
->r_addend
;
1024 /* External symbol. */
1025 bfd_boolean warned ATTRIBUTE_UNUSED
;
1027 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1028 r_symndx
, symtab_hdr
, sym_hashes
,
1030 unresolved_reloc
, warned
);
1031 sym_name
= h
->root
.root
.string
;
1034 /* Sanity check the address. */
1035 if (offset
> bfd_get_section_limit (input_bfd
, input_section
))
1037 r
= bfd_reloc_outofrange
;
1041 switch ((int) r_type
)
1043 case (int) R_MICROBLAZE_SRO32
:
1047 /* Only relocate if the symbol is defined. */
1050 name
= bfd_get_section_name (sec
->owner
, sec
);
1052 if (strcmp (name
, ".sdata2") == 0
1053 || strcmp (name
, ".sbss2") == 0)
1055 if (ro_small_data_pointer
== 0)
1056 microblaze_elf_final_sdp (info
);
1057 if (ro_small_data_pointer
== 0)
1060 r
= bfd_reloc_undefined
;
1064 /* At this point `relocation' contains the object's
1066 relocation
-= ro_small_data_pointer
;
1067 /* Now it contains the offset from _SDA2_BASE_. */
1068 r
= _bfd_final_link_relocate (howto
, input_bfd
,
1071 relocation
, addend
);
1075 (*_bfd_error_handler
) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
1076 bfd_get_filename (input_bfd
),
1078 microblaze_elf_howto_table
[(int) r_type
]->name
,
1079 bfd_get_section_name (sec
->owner
, sec
));
1080 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1088 case (int) R_MICROBLAZE_SRW32
:
1092 /* Only relocate if the symbol is defined. */
1095 name
= bfd_get_section_name (sec
->owner
, sec
);
1097 if (strcmp (name
, ".sdata") == 0
1098 || strcmp (name
, ".sbss") == 0)
1100 if (rw_small_data_pointer
== 0)
1101 microblaze_elf_final_sdp (info
);
1102 if (rw_small_data_pointer
== 0)
1105 r
= bfd_reloc_undefined
;
1109 /* At this point `relocation' contains the object's
1111 relocation
-= rw_small_data_pointer
;
1112 /* Now it contains the offset from _SDA_BASE_. */
1113 r
= _bfd_final_link_relocate (howto
, input_bfd
,
1116 relocation
, addend
);
1120 (*_bfd_error_handler
) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
1121 bfd_get_filename (input_bfd
),
1123 microblaze_elf_howto_table
[(int) r_type
]->name
,
1124 bfd_get_section_name (sec
->owner
, sec
));
1125 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1133 case (int) R_MICROBLAZE_32_SYM_OP_SYM
:
1134 break; /* Do nothing. */
1136 case (int) R_MICROBLAZE_GOTPC_64
:
1137 relocation
= htab
->sgotplt
->output_section
->vma
1138 + htab
->sgotplt
->output_offset
;
1139 relocation
-= (input_section
->output_section
->vma
1140 + input_section
->output_offset
1141 + offset
+ INST_WORD_SIZE
);
1142 relocation
+= addend
;
1143 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1144 contents
+ offset
+ endian
);
1145 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1146 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1149 case (int) R_MICROBLAZE_PLT_64
:
1152 if (htab
->splt
!= NULL
&& h
!= NULL
1153 && h
->plt
.offset
!= (bfd_vma
) -1)
1155 relocation
= (htab
->splt
->output_section
->vma
1156 + htab
->splt
->output_offset
1158 unresolved_reloc
= FALSE
;
1159 immediate
= relocation
- (input_section
->output_section
->vma
1160 + input_section
->output_offset
1161 + offset
+ INST_WORD_SIZE
);
1162 bfd_put_16 (input_bfd
, (immediate
>> 16) & 0xffff,
1163 contents
+ offset
+ endian
);
1164 bfd_put_16 (input_bfd
, immediate
& 0xffff,
1165 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1169 relocation
-= (input_section
->output_section
->vma
1170 + input_section
->output_offset
1171 + offset
+ INST_WORD_SIZE
);
1172 immediate
= relocation
;
1173 bfd_put_16 (input_bfd
, (immediate
>> 16) & 0xffff,
1174 contents
+ offset
+ endian
);
1175 bfd_put_16 (input_bfd
, immediate
& 0xffff,
1176 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1181 case (int) R_MICROBLAZE_TLSGD
:
1182 tls_type
= (TLS_TLS
| TLS_GD
);
1184 case (int) R_MICROBLAZE_TLSLD
:
1185 tls_type
= (TLS_TLS
| TLS_LD
);
1187 case (int) R_MICROBLAZE_GOT_64
:
1192 bfd_vma static_value
;
1194 bfd_boolean need_relocs
= FALSE
;
1195 if (htab
->sgot
== NULL
)
1201 /* 1. Identify GOT Offset;
1202 2. Compute Static Values
1203 3. Process Module Id, Process Offset
1204 4. Fixup Relocation with GOT offset value. */
1206 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1207 if (IS_TLS_LD (tls_type
))
1208 offp
= &htab
->tlsld_got
.offset
;
1211 if (htab
->sgotplt
!= NULL
&& h
->got
.offset
!= (bfd_vma
) -1)
1212 offp
= &h
->got
.offset
;
1218 if (local_got_offsets
== NULL
)
1220 offp
= &local_got_offsets
[r_symndx
];
1229 if (IS_TLS_LD(tls_type
) || IS_TLS_GD(tls_type
))
1232 /* Symbol index to use for relocs */
1236 elf_hash_table (info
)->dynamic_sections_created
;
1238 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
1239 && (!info
->shared
|| !SYMBOL_REFERENCES_LOCAL (info
, h
)))
1243 /* Need to generate relocs ? */
1244 if ((info
->shared
|| indx
!= 0)
1246 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1247 || h
->root
.type
!= bfd_link_hash_undefweak
))
1250 /* 2. Compute/Emit Static value of r-expression */
1251 static_value
= relocation
+ addend
;
1253 /* 3. Process module-id and offset */
1254 if (! ((*offp
) & 1) )
1258 got_offset
= (htab
->sgot
->output_section
->vma
1259 + htab
->sgot
->output_offset
1262 /* Process module-id */
1263 if (IS_TLS_LD(tls_type
))
1267 bfd_put_32 (output_bfd
, 1, htab
->sgot
->contents
+ off
);
1271 microblaze_elf_output_dynamic_relocation (output_bfd
,
1272 htab
->srelgot
, htab
->srelgot
->reloc_count
++,
1273 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32
,
1277 else if (IS_TLS_GD(tls_type
))
1281 bfd_put_32 (output_bfd
, 1, htab
->sgot
->contents
+ off
);
1285 microblaze_elf_output_dynamic_relocation (output_bfd
,
1287 htab
->srelgot
->reloc_count
++,
1288 /* symindex= */ indx
, R_MICROBLAZE_TLSDTPMOD32
,
1289 got_offset
, indx
? 0 : static_value
);
1293 /* Process Offset */
1294 if (htab
->srelgot
== NULL
)
1297 got_offset
= (htab
->sgot
->output_section
->vma
1298 + htab
->sgot
->output_offset
1300 if (IS_TLS_LD(tls_type
))
1302 /* For LD, offset should be 0 */
1304 bfd_put_32 (output_bfd
, 0, htab
->sgot
->contents
+ off2
);
1306 else if (IS_TLS_GD(tls_type
))
1309 static_value
-= dtprel_base(info
);
1312 microblaze_elf_output_dynamic_relocation (output_bfd
,
1313 htab
->srelgot
, htab
->srelgot
->reloc_count
++,
1314 /* symindex= */ indx
, R_MICROBLAZE_TLSDTPREL32
,
1315 got_offset
, indx
? 0 : static_value
);
1319 bfd_put_32 (output_bfd
, static_value
,
1320 htab
->sgot
->contents
+ off2
);
1325 bfd_put_32 (output_bfd
, static_value
,
1326 htab
->sgot
->contents
+ off2
);
1328 /* Relocs for dyn symbols generated by
1329 finish_dynamic_symbols */
1330 if (info
->shared
&& h
== NULL
)
1333 microblaze_elf_output_dynamic_relocation (output_bfd
,
1334 htab
->srelgot
, htab
->srelgot
->reloc_count
++,
1335 /* symindex= */ indx
, R_MICROBLAZE_REL
,
1336 got_offset
, static_value
);
1341 /* 4. Fixup Relocation with GOT offset value
1342 Compute relative address of GOT entry for applying
1343 the current relocation */
1344 relocation
= htab
->sgot
->output_section
->vma
1345 + htab
->sgot
->output_offset
1347 - htab
->sgotplt
->output_section
->vma
1348 - htab
->sgotplt
->output_offset
;
1350 /* Apply Current Relocation */
1351 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1352 contents
+ offset
+ endian
);
1353 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1354 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1356 unresolved_reloc
= FALSE
;
1360 case (int) R_MICROBLAZE_GOTOFF_64
:
1363 unsigned short lo
, high
;
1364 relocation
+= addend
;
1365 relocation
-= htab
->sgotplt
->output_section
->vma
1366 + htab
->sgotplt
->output_offset
;
1367 /* Write this value into correct location. */
1368 immediate
= relocation
;
1369 lo
= immediate
& 0x0000ffff;
1370 high
= (immediate
>> 16) & 0x0000ffff;
1371 bfd_put_16 (input_bfd
, high
, contents
+ offset
+ endian
);
1372 bfd_put_16 (input_bfd
, lo
, contents
+ offset
+ INST_WORD_SIZE
+ endian
);
1376 case (int) R_MICROBLAZE_GOTOFF_32
:
1378 relocation
+= addend
;
1379 relocation
-= htab
->sgotplt
->output_section
->vma
1380 + htab
->sgotplt
->output_offset
;
1381 /* Write this value into correct location. */
1382 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1386 case (int) R_MICROBLAZE_TLSDTPREL64
:
1387 relocation
+= addend
;
1388 relocation
-= dtprel_base(info
);
1389 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1390 contents
+ offset
+ 2);
1391 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1392 contents
+ offset
+ 2 + INST_WORD_SIZE
);
1394 case (int) R_MICROBLAZE_64_PCREL
:
1395 case (int) R_MICROBLAZE_64
:
1396 case (int) R_MICROBLAZE_32
:
1398 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1399 from removed linkonce sections, or sections discarded by
1401 if (r_symndx
== STN_UNDEF
|| (input_section
->flags
& SEC_ALLOC
) == 0)
1403 relocation
+= addend
;
1404 if (r_type
== R_MICROBLAZE_32
)
1405 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1408 if (r_type
== R_MICROBLAZE_64_PCREL
)
1409 relocation
-= (input_section
->output_section
->vma
1410 + input_section
->output_offset
1411 + offset
+ INST_WORD_SIZE
);
1412 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1413 contents
+ offset
+ endian
);
1414 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1415 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1422 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1423 || h
->root
.type
!= bfd_link_hash_undefweak
)
1424 && (!howto
->pc_relative
1428 || !h
->def_regular
))))
1435 || h
->root
.type
== bfd_link_hash_undefweak
1436 || h
->root
.type
== bfd_link_hash_undefined
)))
1438 Elf_Internal_Rela outrel
;
1442 /* When generating a shared object, these relocations
1443 are copied into the output file to be resolved at run
1446 BFD_ASSERT (sreloc
!= NULL
);
1451 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1453 if (outrel
.r_offset
== (bfd_vma
) -1)
1455 else if (outrel
.r_offset
== (bfd_vma
) -2)
1457 outrel
.r_offset
+= (input_section
->output_section
->vma
1458 + input_section
->output_offset
);
1461 memset (&outrel
, 0, sizeof outrel
);
1462 /* h->dynindx may be -1 if the symbol was marked to
1465 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1466 || !h
->def_regular
))
1468 BFD_ASSERT (h
->dynindx
!= -1);
1469 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
1470 outrel
.r_addend
= addend
;
1474 if (r_type
== R_MICROBLAZE_32
)
1476 outrel
.r_info
= ELF32_R_INFO (0, R_MICROBLAZE_REL
);
1477 outrel
.r_addend
= relocation
+ addend
;
1482 (*_bfd_error_handler
)
1483 (_("%B: probably compiled without -fPIC?"),
1485 bfd_set_error (bfd_error_bad_value
);
1490 loc
= sreloc
->contents
;
1491 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1492 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1497 relocation
+= addend
;
1498 if (r_type
== R_MICROBLAZE_32
)
1499 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1502 if (r_type
== R_MICROBLAZE_64_PCREL
)
1503 relocation
-= (input_section
->output_section
->vma
1504 + input_section
->output_offset
1505 + offset
+ INST_WORD_SIZE
);
1506 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1507 contents
+ offset
+ endian
);
1508 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1509 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1516 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1518 relocation
, addend
);
1525 if (r
!= bfd_reloc_ok
)
1527 /* FIXME: This should be generic enough to go in a utility. */
1531 name
= h
->root
.root
.string
;
1534 name
= (bfd_elf_string_from_elf_section
1535 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
1536 if (name
== NULL
|| *name
== '\0')
1537 name
= bfd_section_name (input_bfd
, sec
);
1545 case bfd_reloc_overflow
:
1546 if (!((*info
->callbacks
->reloc_overflow
)
1547 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1548 (bfd_vma
) 0, input_bfd
, input_section
, offset
)))
1552 case bfd_reloc_undefined
:
1553 if (!((*info
->callbacks
->undefined_symbol
)
1554 (info
, name
, input_bfd
, input_section
, offset
, TRUE
)))
1558 case bfd_reloc_outofrange
:
1559 errmsg
= _("internal error: out of range error");
1562 case bfd_reloc_notsupported
:
1563 errmsg
= _("internal error: unsupported relocation error");
1566 case bfd_reloc_dangerous
:
1567 errmsg
= _("internal error: dangerous error");
1571 errmsg
= _("internal error: unknown error");
1574 if (!((*info
->callbacks
->warning
)
1575 (info
, errmsg
, name
, input_bfd
, input_section
, offset
)))
1585 /* Merge backend specific data from an object file to the output
1586 object file when linking.
1588 Note: We only use this hook to catch endian mismatches. */
1590 microblaze_elf_merge_private_bfd_data (bfd
* ibfd
, bfd
* obfd
)
1592 /* Check if we have the same endianess. */
1593 if (! _bfd_generic_verify_endian_match (ibfd
, obfd
))
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 (link_info
->relocatable
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 (info
->relocatable
)
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
);
2391 sec
->has_tls_reloc
= 1;
2392 case R_MICROBLAZE_GOT_64
:
2393 if (htab
->sgot
== NULL
)
2395 if (htab
->elf
.dynobj
== NULL
)
2396 htab
->elf
.dynobj
= abfd
;
2397 if (!create_got_section (htab
->elf
.dynobj
, info
))
2402 h
->got
.refcount
+= 1;
2403 elf32_mb_hash_entry (h
)->tls_mask
|= tls_type
;
2407 if (! update_local_sym_info(abfd
, symtab_hdr
, r_symndx
, tls_type
) )
2412 case R_MICROBLAZE_64
:
2413 case R_MICROBLAZE_64_PCREL
:
2414 case R_MICROBLAZE_32
:
2416 if (h
!= NULL
&& !info
->shared
)
2418 /* we may need a copy reloc. */
2421 /* we may also need a .plt entry. */
2422 h
->plt
.refcount
+= 1;
2423 if (ELF32_R_TYPE (rel
->r_info
) != R_MICROBLAZE_64_PCREL
)
2424 h
->pointer_equality_needed
= 1;
2428 /* If we are creating a shared library, and this is a reloc
2429 against a global symbol, or a non PC relative reloc
2430 against a local symbol, then we need to copy the reloc
2431 into the shared library. However, if we are linking with
2432 -Bsymbolic, we do not need to copy a reloc against a
2433 global symbol which is defined in an object we are
2434 including in the link (i.e., DEF_REGULAR is set). At
2435 this point we have not seen all the input files, so it is
2436 possible that DEF_REGULAR is not set now but will be set
2437 later (it is never cleared). In case of a weak definition,
2438 DEF_REGULAR may be cleared later by a strong definition in
2439 a shared library. We account for that possibility below by
2440 storing information in the relocs_copied field of the hash
2441 table entry. A similar situation occurs when creating
2442 shared libraries and symbol visibility changes render the
2445 If on the other hand, we are creating an executable, we
2446 may need to keep relocations for symbols satisfied by a
2447 dynamic library if we manage to avoid copy relocs for the
2451 && (sec
->flags
& SEC_ALLOC
) != 0
2452 && (r_type
!= R_MICROBLAZE_64_PCREL
2454 && (! info
->symbolic
2455 || h
->root
.type
== bfd_link_hash_defweak
2456 || !h
->def_regular
))))
2458 && (sec
->flags
& SEC_ALLOC
) != 0
2460 && (h
->root
.type
== bfd_link_hash_defweak
2461 || !h
->def_regular
)))
2463 struct elf32_mb_dyn_relocs
*p
;
2464 struct elf32_mb_dyn_relocs
**head
;
2466 /* When creating a shared object, we must copy these
2467 relocs into the output file. We create a reloc
2468 section in dynobj and make room for the reloc. */
2474 if (htab
->elf
.dynobj
== NULL
)
2475 htab
->elf
.dynobj
= abfd
;
2476 dynobj
= htab
->elf
.dynobj
;
2478 sreloc
= _bfd_elf_make_dynamic_reloc_section (sec
, dynobj
,
2484 /* If this is a global symbol, we count the number of
2485 relocations we need for this symbol. */
2487 head
= &((struct elf32_mb_link_hash_entry
*) h
)->dyn_relocs
;
2490 /* Track dynamic relocs needed for local syms too.
2491 We really need local syms available to do this
2495 Elf_Internal_Sym
*isym
;
2498 isym
= bfd_sym_from_r_symndx (&htab
->sym_sec
,
2503 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2507 vpp
= &elf_section_data (s
)->local_dynrel
;
2508 head
= (struct elf32_mb_dyn_relocs
**) vpp
;
2512 if (p
== NULL
|| p
->sec
!= sec
)
2514 bfd_size_type amt
= sizeof *p
;
2515 p
= ((struct elf32_mb_dyn_relocs
*)
2516 bfd_alloc (htab
->elf
.dynobj
, amt
));
2527 if (r_type
== R_MICROBLAZE_64_PCREL
)
2539 microblaze_elf_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
2541 struct elf32_mb_link_hash_table
*htab
;
2543 htab
= elf32_mb_hash_table (info
);
2547 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
2550 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
2553 htab
->splt
= bfd_get_linker_section (dynobj
, ".plt");
2554 htab
->srelplt
= bfd_get_linker_section (dynobj
, ".rela.plt");
2555 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
2557 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
2559 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
2560 || (!info
->shared
&& !htab
->srelbss
))
2566 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2569 microblaze_elf_copy_indirect_symbol (struct bfd_link_info
*info
,
2570 struct elf_link_hash_entry
*dir
,
2571 struct elf_link_hash_entry
*ind
)
2573 struct elf32_mb_link_hash_entry
*edir
, *eind
;
2575 edir
= (struct elf32_mb_link_hash_entry
*) dir
;
2576 eind
= (struct elf32_mb_link_hash_entry
*) ind
;
2578 if (eind
->dyn_relocs
!= NULL
)
2580 if (edir
->dyn_relocs
!= NULL
)
2582 struct elf32_mb_dyn_relocs
**pp
;
2583 struct elf32_mb_dyn_relocs
*p
;
2585 if (ind
->root
.type
== bfd_link_hash_indirect
)
2588 /* Add reloc counts against the weak sym to the strong sym
2589 list. Merge any entries against the same section. */
2590 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
2592 struct elf32_mb_dyn_relocs
*q
;
2594 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2595 if (q
->sec
== p
->sec
)
2597 q
->pc_count
+= p
->pc_count
;
2598 q
->count
+= p
->count
;
2605 *pp
= edir
->dyn_relocs
;
2608 edir
->dyn_relocs
= eind
->dyn_relocs
;
2609 eind
->dyn_relocs
= NULL
;
2612 edir
->tls_mask
|= eind
->tls_mask
;
2614 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2618 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2619 struct elf_link_hash_entry
*h
)
2621 struct elf32_mb_link_hash_table
*htab
;
2622 struct elf32_mb_link_hash_entry
* eh
;
2623 struct elf32_mb_dyn_relocs
*p
;
2624 asection
*sdynbss
, *s
;
2625 unsigned int power_of_two
;
2628 htab
= elf32_mb_hash_table (info
);
2632 /* If this is a function, put it in the procedure linkage table. We
2633 will fill in the contents of the procedure linkage table later,
2634 when we know the address of the .got section. */
2635 if (h
->type
== STT_FUNC
2638 if (h
->plt
.refcount
<= 0
2639 || SYMBOL_CALLS_LOCAL (info
, h
)
2640 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2641 && h
->root
.type
== bfd_link_hash_undefweak
))
2643 /* This case can occur if we saw a PLT reloc in an input
2644 file, but the symbol was never referred to by a dynamic
2645 object, or if all references were garbage collected. In
2646 such a case, we don't actually need to build a procedure
2647 linkage table, and we can just do a PC32 reloc instead. */
2648 h
->plt
.offset
= (bfd_vma
) -1;
2655 /* It's possible that we incorrectly decided a .plt reloc was
2656 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2657 check_relocs. We can't decide accurately between function and
2658 non-function syms in check-relocs; Objects loaded later in
2659 the link may change h->type. So fix it now. */
2660 h
->plt
.offset
= (bfd_vma
) -1;
2662 /* If this is a weak symbol, and there is a real definition, the
2663 processor independent code will have arranged for us to see the
2664 real definition first, and we can just use the same value. */
2665 if (h
->u
.weakdef
!= NULL
)
2667 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2668 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2669 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2670 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2674 /* This is a reference to a symbol defined by a dynamic object which
2675 is not a function. */
2677 /* If we are creating a shared library, we must presume that the
2678 only references to the symbol are via the global offset table.
2679 For such cases we need not do anything here; the relocations will
2680 be handled correctly by relocate_section. */
2684 /* If there are no references to this symbol that do not use the
2685 GOT, we don't need to generate a copy reloc. */
2686 if (!h
->non_got_ref
)
2689 /* If -z nocopyreloc was given, we won't generate them either. */
2690 if (info
->nocopyreloc
)
2696 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2697 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2699 s
= p
->sec
->output_section
;
2700 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2704 /* If we didn't find any dynamic relocs in read-only sections, then
2705 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2712 /* We must allocate the symbol in our .dynbss section, which will
2713 become part of the .bss section of the executable. There will be
2714 an entry for this symbol in the .dynsym section. The dynamic
2715 object will contain position independent code, so all references
2716 from the dynamic object to this symbol will go through the global
2717 offset table. The dynamic linker will use the .dynsym entry to
2718 determine the address it must put in the global offset table, so
2719 both the dynamic object and the regular object will refer to the
2720 same memory location for the variable. */
2722 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2723 to copy the initial value out of the dynamic object and into the
2724 runtime process image. */
2725 dynobj
= elf_hash_table (info
)->dynobj
;
2726 BFD_ASSERT (dynobj
!= NULL
);
2727 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2729 htab
->srelbss
->size
+= sizeof (Elf32_External_Rela
);
2733 /* We need to figure out the alignment required for this symbol. I
2734 have no idea how ELF linkers handle this. */
2735 power_of_two
= bfd_log2 (h
->size
);
2736 if (power_of_two
> 3)
2739 sdynbss
= htab
->sdynbss
;
2740 /* Apply the required alignment. */
2741 sdynbss
->size
= BFD_ALIGN (sdynbss
->size
, (bfd_size_type
) (1 << power_of_two
));
2742 if (power_of_two
> bfd_get_section_alignment (dynobj
, sdynbss
))
2744 if (! bfd_set_section_alignment (dynobj
, sdynbss
, power_of_two
))
2748 /* Define the symbol as being at this point in the section. */
2749 h
->root
.u
.def
.section
= sdynbss
;
2750 h
->root
.u
.def
.value
= sdynbss
->size
;
2752 /* Increment the section size to make room for the symbol. */
2753 sdynbss
->size
+= h
->size
;
2757 /* Allocate space in .plt, .got and associated reloc sections for
2761 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * dat
)
2763 struct bfd_link_info
*info
;
2764 struct elf32_mb_link_hash_table
*htab
;
2765 struct elf32_mb_link_hash_entry
*eh
;
2766 struct elf32_mb_dyn_relocs
*p
;
2768 if (h
->root
.type
== bfd_link_hash_indirect
)
2771 info
= (struct bfd_link_info
*) dat
;
2772 htab
= elf32_mb_hash_table (info
);
2776 if (htab
->elf
.dynamic_sections_created
2777 && h
->plt
.refcount
> 0)
2779 /* Make sure this symbol is output as a dynamic symbol.
2780 Undefined weak syms won't yet be marked as dynamic. */
2781 if (h
->dynindx
== -1
2782 && !h
->forced_local
)
2784 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2788 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
->shared
, h
))
2790 asection
*s
= htab
->splt
;
2792 /* The first entry in .plt is reserved. */
2794 s
->size
= PLT_ENTRY_SIZE
;
2796 h
->plt
.offset
= s
->size
;
2798 /* If this symbol is not defined in a regular file, and we are
2799 not generating a shared library, then set the symbol to this
2800 location in the .plt. This is required to make function
2801 pointers compare as equal between the normal executable and
2802 the shared library. */
2806 h
->root
.u
.def
.section
= s
;
2807 h
->root
.u
.def
.value
= h
->plt
.offset
;
2810 /* Make room for this entry. */
2811 s
->size
+= PLT_ENTRY_SIZE
;
2813 /* We also need to make an entry in the .got.plt section, which
2814 will be placed in the .got section by the linker script. */
2815 htab
->sgotplt
->size
+= 4;
2817 /* We also need to make an entry in the .rel.plt section. */
2818 htab
->srelplt
->size
+= sizeof (Elf32_External_Rela
);
2822 h
->plt
.offset
= (bfd_vma
) -1;
2828 h
->plt
.offset
= (bfd_vma
) -1;
2832 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2833 if (h
->got
.refcount
> 0)
2838 /* Make sure this symbol is output as a dynamic symbol.
2839 Undefined weak syms won't yet be marked as dynamic. */
2840 if (h
->dynindx
== -1
2841 && !h
->forced_local
)
2843 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2848 if ((eh
->tls_mask
& TLS_TLS
) != 0)
2850 /* Handle TLS Symbol */
2851 if ((eh
->tls_mask
& TLS_LD
) != 0)
2853 if (!eh
->elf
.def_dynamic
)
2854 /* We'll just use htab->tlsld_got.offset. This should
2855 always be the case. It's a little odd if we have
2856 a local dynamic reloc against a non-local symbol. */
2857 htab
->tlsld_got
.refcount
+= 1;
2861 if ((eh
->tls_mask
& TLS_GD
) != 0)
2866 /* Regular (non-TLS) symbol */
2871 h
->got
.offset
= (bfd_vma
) -1;
2876 h
->got
.offset
= s
->size
;
2878 htab
->srelgot
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
2882 h
->got
.offset
= (bfd_vma
) -1;
2884 if (eh
->dyn_relocs
== NULL
)
2887 /* In the shared -Bsymbolic case, discard space allocated for
2888 dynamic pc-relative relocs against symbols which turn out to be
2889 defined in regular objects. For the normal shared case, discard
2890 space for pc-relative relocs that have become local due to symbol
2891 visibility changes. */
2899 struct elf32_mb_dyn_relocs
**pp
;
2901 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2903 p
->count
-= p
->pc_count
;
2914 /* For the non-shared case, discard space for relocs against
2915 symbols which turn out to need copy relocs or are not
2921 || (htab
->elf
.dynamic_sections_created
2922 && (h
->root
.type
== bfd_link_hash_undefweak
2923 || h
->root
.type
== bfd_link_hash_undefined
))))
2925 /* Make sure this symbol is output as a dynamic symbol.
2926 Undefined weak syms won't yet be marked as dynamic. */
2927 if (h
->dynindx
== -1
2928 && !h
->forced_local
)
2930 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2934 /* If that succeeded, we know we'll be keeping all the
2936 if (h
->dynindx
!= -1)
2940 eh
->dyn_relocs
= NULL
;
2945 /* Finally, allocate space. */
2946 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2948 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
2949 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2955 /* Set the sizes of the dynamic sections. */
2958 microblaze_elf_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2959 struct bfd_link_info
*info
)
2961 struct elf32_mb_link_hash_table
*htab
;
2966 htab
= elf32_mb_hash_table (info
);
2970 dynobj
= htab
->elf
.dynobj
;
2971 BFD_ASSERT (dynobj
!= NULL
);
2973 /* Set up .got offsets for local syms, and space for local dynamic
2975 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2977 bfd_signed_vma
*local_got
;
2978 bfd_signed_vma
*end_local_got
;
2979 bfd_size_type locsymcount
;
2980 Elf_Internal_Shdr
*symtab_hdr
;
2981 unsigned char *lgot_masks
;
2984 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2987 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2989 struct elf32_mb_dyn_relocs
*p
;
2991 for (p
= ((struct elf32_mb_dyn_relocs
*)
2992 elf_section_data (s
)->local_dynrel
);
2996 if (!bfd_is_abs_section (p
->sec
)
2997 && bfd_is_abs_section (p
->sec
->output_section
))
2999 /* Input section has been discarded, either because
3000 it is a copy of a linkonce section or due to
3001 linker script /DISCARD/, so we'll be discarding
3004 else if (p
->count
!= 0)
3006 srel
= elf_section_data (p
->sec
)->sreloc
;
3007 srel
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
3008 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
3009 info
->flags
|= DF_TEXTREL
;
3014 local_got
= elf_local_got_refcounts (ibfd
);
3018 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
3019 locsymcount
= symtab_hdr
->sh_info
;
3020 end_local_got
= local_got
+ locsymcount
;
3021 lgot_masks
= (unsigned char *) end_local_got
;
3023 srel
= htab
->srelgot
;
3025 for (; local_got
< end_local_got
; ++local_got
, ++lgot_masks
)
3029 unsigned int need
= 0;
3030 if ((*lgot_masks
& TLS_TLS
) != 0)
3032 if ((*lgot_masks
& TLS_GD
) != 0)
3034 if ((*lgot_masks
& TLS_LD
) != 0)
3035 htab
->tlsld_got
.refcount
+= 1;
3042 *local_got
= (bfd_vma
) -1;
3046 *local_got
= s
->size
;
3049 srel
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
3053 *local_got
= (bfd_vma
) -1;
3057 /* Allocate global sym .plt and .got entries, and space for global
3058 sym dynamic relocs. */
3059 elf_link_hash_traverse (elf_hash_table (info
), allocate_dynrelocs
, info
);
3061 if (htab
->tlsld_got
.refcount
> 0)
3063 htab
->tlsld_got
.offset
= htab
->sgot
->size
;
3064 htab
->sgot
->size
+= 8;
3066 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
3069 htab
->tlsld_got
.offset
= (bfd_vma
) -1;
3071 if (elf_hash_table (info
)->dynamic_sections_created
)
3073 /* Make space for the trailing nop in .plt. */
3074 if (htab
->splt
->size
> 0)
3075 htab
->splt
->size
+= 4;
3078 /* The check_relocs and adjust_dynamic_symbol entry points have
3079 determined the sizes of the various dynamic sections. Allocate
3081 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3084 bfd_boolean strip
= FALSE
;
3086 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3089 /* It's OK to base decisions on the section name, because none
3090 of the dynobj section names depend upon the input files. */
3091 name
= bfd_get_section_name (dynobj
, s
);
3093 if (strncmp (name
, ".rela", 5) == 0)
3097 /* If we don't need this section, strip it from the
3098 output file. This is to handle .rela.bss and
3099 .rela.plt. We must create it in
3100 create_dynamic_sections, because it must be created
3101 before the linker maps input sections to output
3102 sections. The linker does that before
3103 adjust_dynamic_symbol is called, and it is that
3104 function which decides whether anything needs to go
3105 into these sections. */
3110 /* We use the reloc_count field as a counter if we need
3111 to copy relocs into the output file. */
3115 else if (s
!= htab
->splt
&& s
!= htab
->sgot
&& s
!= htab
->sgotplt
)
3117 /* It's not one of our sections, so don't allocate space. */
3123 s
->flags
|= SEC_EXCLUDE
;
3127 /* Allocate memory for the section contents. */
3128 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3129 Unused entries should be reclaimed before the section's contents
3130 are written out, but at the moment this does not happen. Thus in
3131 order to prevent writing out garbage, we initialise the section's
3132 contents to zero. */
3133 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3134 if (s
->contents
== NULL
&& s
->size
!= 0)
3138 if (elf_hash_table (info
)->dynamic_sections_created
)
3140 /* Add some entries to the .dynamic section. We fill in the
3141 values later, in microblaze_elf_finish_dynamic_sections, but we
3142 must add the entries now so that we get the correct size for
3143 the .dynamic section. The DT_DEBUG entry is filled in by the
3144 dynamic linker and used by the debugger. */
3145 #define add_dynamic_entry(TAG, VAL) \
3146 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3148 if (info
->executable
)
3150 if (!add_dynamic_entry (DT_DEBUG
, 0))
3154 if (!add_dynamic_entry (DT_RELA
, 0)
3155 || !add_dynamic_entry (DT_RELASZ
, 0)
3156 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3159 if (htab
->splt
->size
!= 0)
3161 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3162 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3163 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3164 || !add_dynamic_entry (DT_JMPREL
, 0)
3165 || !add_dynamic_entry (DT_BIND_NOW
, 1))
3169 if (info
->flags
& DF_TEXTREL
)
3171 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3175 #undef add_dynamic_entry
3179 /* Finish up dynamic symbol handling. We set the contents of various
3180 dynamic sections here. */
3183 microblaze_elf_finish_dynamic_symbol (bfd
*output_bfd
,
3184 struct bfd_link_info
*info
,
3185 struct elf_link_hash_entry
*h
,
3186 Elf_Internal_Sym
*sym
)
3188 struct elf32_mb_link_hash_table
*htab
;
3189 struct elf32_mb_link_hash_entry
*eh
= elf32_mb_hash_entry(h
);
3191 htab
= elf32_mb_hash_table (info
);
3195 if (h
->plt
.offset
!= (bfd_vma
) -1)
3200 Elf_Internal_Rela rela
;
3206 /* This symbol has an entry in the procedure linkage table. Set
3208 BFD_ASSERT (h
->dynindx
!= -1);
3211 srela
= htab
->srelplt
;
3212 sgotplt
= htab
->sgotplt
;
3213 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
&& sgotplt
!= NULL
);
3215 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1; /* first entry reserved. */
3216 got_offset
= (plt_index
+ 3) * 4; /* 3 reserved ??? */
3217 got_addr
= got_offset
;
3219 /* For non-PIC objects we need absolute address of the GOT entry. */
3221 got_addr
+= htab
->sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
3223 /* Fill in the entry in the procedure linkage table. */
3224 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_0
+ ((got_addr
>> 16) & 0xffff),
3225 splt
->contents
+ h
->plt
.offset
);
3227 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1
+ (got_addr
& 0xffff),
3228 splt
->contents
+ h
->plt
.offset
+ 4);
3230 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1_NOPIC
+ (got_addr
& 0xffff),
3231 splt
->contents
+ h
->plt
.offset
+ 4);
3232 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_2
,
3233 splt
->contents
+ h
->plt
.offset
+ 8);
3234 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_3
,
3235 splt
->contents
+ h
->plt
.offset
+ 12);
3237 /* Any additions to the .got section??? */
3238 /* bfd_put_32 (output_bfd,
3239 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3240 sgotplt->contents + got_offset); */
3242 /* Fill in the entry in the .rela.plt section. */
3243 rela
.r_offset
= (sgotplt
->output_section
->vma
3244 + sgotplt
->output_offset
3246 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_JUMP_SLOT
);
3248 loc
= srela
->contents
;
3249 loc
+= plt_index
* sizeof (Elf32_External_Rela
);
3250 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3252 if (!h
->def_regular
)
3254 /* Mark the symbol as undefined, rather than as defined in
3255 the .plt section. Zero the value. */
3256 sym
->st_shndx
= SHN_UNDEF
;
3261 /* h->got.refcount to be checked ? */
3262 if (h
->got
.offset
!= (bfd_vma
) -1 &&
3263 ! ((h
->got
.offset
& 1) ||
3264 IS_TLS_LD(eh
->tls_mask
) || IS_TLS_GD(eh
->tls_mask
)))
3270 /* This symbol has an entry in the global offset table. Set it
3274 srela
= htab
->srelgot
;
3275 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
3277 offset
= (sgot
->output_section
->vma
+ sgot
->output_offset
3278 + (h
->got
.offset
&~ (bfd_vma
) 1));
3280 /* If this is a -Bsymbolic link, and the symbol is defined
3281 locally, we just want to emit a RELATIVE reloc. Likewise if
3282 the symbol was forced to be local because of a version file.
3283 The entry in the global offset table will already have been
3284 initialized in the relocate_section function. */
3286 && (info
->symbolic
|| h
->dynindx
== -1)
3289 asection
*sec
= h
->root
.u
.def
.section
;
3290 microblaze_elf_output_dynamic_relocation (output_bfd
,
3291 srela
, srela
->reloc_count
++,
3293 R_MICROBLAZE_REL
, offset
,
3295 + sec
->output_section
->vma
3296 + sec
->output_offset
);
3300 microblaze_elf_output_dynamic_relocation (output_bfd
,
3301 srela
, srela
->reloc_count
++,
3303 R_MICROBLAZE_GLOB_DAT
,
3307 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3308 sgot
->contents
+ (h
->got
.offset
&~ (bfd_vma
) 1));
3314 Elf_Internal_Rela rela
;
3317 /* This symbols needs a copy reloc. Set it up. */
3319 BFD_ASSERT (h
->dynindx
!= -1);
3321 s
= bfd_get_linker_section (htab
->elf
.dynobj
, ".rela.bss");
3322 BFD_ASSERT (s
!= NULL
);
3324 rela
.r_offset
= (h
->root
.u
.def
.value
3325 + h
->root
.u
.def
.section
->output_section
->vma
3326 + h
->root
.u
.def
.section
->output_offset
);
3327 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_COPY
);
3329 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3330 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3333 /* Mark some specially defined symbols as absolute. */
3334 if (h
== htab
->elf
.hdynamic
3335 || h
== htab
->elf
.hgot
3336 || h
== htab
->elf
.hplt
)
3337 sym
->st_shndx
= SHN_ABS
;
3343 /* Finish up the dynamic sections. */
3346 microblaze_elf_finish_dynamic_sections (bfd
*output_bfd
,
3347 struct bfd_link_info
*info
)
3350 asection
*sdyn
, *sgot
;
3351 struct elf32_mb_link_hash_table
*htab
;
3353 htab
= elf32_mb_hash_table (info
);
3357 dynobj
= htab
->elf
.dynobj
;
3359 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3361 if (htab
->elf
.dynamic_sections_created
)
3364 Elf32_External_Dyn
*dyncon
, *dynconend
;
3366 splt
= bfd_get_linker_section (dynobj
, ".plt");
3367 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
3369 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3370 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3371 for (; dyncon
< dynconend
; dyncon
++)
3373 Elf_Internal_Dyn dyn
;
3377 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3381 case DT_PLTGOT
: name
= ".got.plt"; size
= FALSE
; break;
3382 case DT_PLTRELSZ
: name
= ".rela.plt"; size
= TRUE
; break;
3383 case DT_JMPREL
: name
= ".rela.plt"; size
= FALSE
; break;
3384 case DT_RELA
: name
= ".rela.dyn"; size
= FALSE
; break;
3385 case DT_RELASZ
: name
= ".rela.dyn"; size
= TRUE
; break;
3386 default: name
= NULL
; size
= FALSE
; break;
3393 s
= bfd_get_section_by_name (output_bfd
, name
);
3399 dyn
.d_un
.d_ptr
= s
->vma
;
3401 dyn
.d_un
.d_val
= s
->size
;
3403 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3407 /* Clear the first entry in the procedure linkage table,
3408 and put a nop in the last four bytes. */
3411 memset (splt
->contents
, 0, PLT_ENTRY_SIZE
);
3412 bfd_put_32 (output_bfd
, (bfd_vma
) 0x80000000 /* nop. */,
3413 splt
->contents
+ splt
->size
- 4);
3416 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
3419 /* Set the first entry in the global offset table to the address of
3420 the dynamic section. */
3421 sgot
= bfd_get_linker_section (dynobj
, ".got.plt");
3422 if (sgot
&& sgot
->size
> 0)
3425 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
3427 bfd_put_32 (output_bfd
,
3428 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
3430 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3433 if (htab
->sgot
&& htab
->sgot
->size
> 0)
3434 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3439 /* Hook called by the linker routine which adds symbols from an object
3440 file. We use it to put .comm items in .sbss, and not .bss. */
3443 microblaze_elf_add_symbol_hook (bfd
*abfd
,
3444 struct bfd_link_info
*info
,
3445 Elf_Internal_Sym
*sym
,
3446 const char **namep ATTRIBUTE_UNUSED
,
3447 flagword
*flagsp ATTRIBUTE_UNUSED
,
3451 if (sym
->st_shndx
== SHN_COMMON
3452 && !info
->relocatable
3453 && sym
->st_size
<= elf_gp_size (abfd
))
3455 /* Common symbols less than or equal to -G nn bytes are automatically
3457 *secp
= bfd_make_section_old_way (abfd
, ".sbss");
3459 || ! bfd_set_section_flags (abfd
, *secp
, SEC_IS_COMMON
))
3462 *valp
= sym
->st_size
;
3468 #define TARGET_LITTLE_SYM bfd_elf32_microblazeel_vec
3469 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3471 #define TARGET_BIG_SYM bfd_elf32_microblaze_vec
3472 #define TARGET_BIG_NAME "elf32-microblaze"
3474 #define ELF_ARCH bfd_arch_microblaze
3475 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3476 #define ELF_MACHINE_CODE EM_MICROBLAZE
3477 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3478 #define ELF_MAXPAGESIZE 0x1000
3479 #define elf_info_to_howto microblaze_elf_info_to_howto
3480 #define elf_info_to_howto_rel NULL
3482 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3483 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3484 #define elf_backend_relocate_section microblaze_elf_relocate_section
3485 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3486 #define bfd_elf32_bfd_merge_private_bfd_data microblaze_elf_merge_private_bfd_data
3487 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3489 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3490 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3491 #define elf_backend_check_relocs microblaze_elf_check_relocs
3492 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3493 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3494 #define elf_backend_can_gc_sections 1
3495 #define elf_backend_can_refcount 1
3496 #define elf_backend_want_got_plt 1
3497 #define elf_backend_plt_readonly 1
3498 #define elf_backend_got_header_size 12
3499 #define elf_backend_rela_normal 1
3501 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3502 #define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections
3503 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3504 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3505 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3506 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3508 #include "elf32-target.h"