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 addr
, asection
*sec
)
1607 if (sec
== NULL
|| sec
->relax
== NULL
)
1610 /* Look for addr in relax table, total fixup value. */
1611 for (i
= 0; i
< sec
->relax_count
; i
++)
1613 if (addr
<= sec
->relax
[i
].addr
)
1615 fixup
+= sec
->relax
[i
].size
;
1621 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1622 a 32-bit instruction. */
1624 microblaze_bfd_write_imm_value_32 (bfd
*abfd
, bfd_byte
*bfd_addr
, bfd_vma val
)
1626 unsigned long instr
= bfd_get_32 (abfd
, bfd_addr
);
1627 instr
&= ~0x0000ffff;
1628 instr
|= (val
& 0x0000ffff);
1629 bfd_put_32 (abfd
, instr
, bfd_addr
);
1632 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1633 two consecutive 32-bit instructions. */
1635 microblaze_bfd_write_imm_value_64 (bfd
*abfd
, bfd_byte
*bfd_addr
, bfd_vma val
)
1637 unsigned long instr_hi
;
1638 unsigned long instr_lo
;
1640 instr_hi
= bfd_get_32 (abfd
, bfd_addr
);
1641 instr_hi
&= ~0x0000ffff;
1642 instr_hi
|= ((val
>> 16) & 0x0000ffff);
1643 bfd_put_32 (abfd
, instr_hi
, bfd_addr
);
1645 instr_lo
= bfd_get_32 (abfd
, bfd_addr
+ INST_WORD_SIZE
);
1646 instr_lo
&= ~0x0000ffff;
1647 instr_lo
|= (val
& 0x0000ffff);
1648 bfd_put_32 (abfd
, instr_lo
, bfd_addr
+ INST_WORD_SIZE
);
1652 microblaze_elf_relax_section (bfd
*abfd
,
1654 struct bfd_link_info
*link_info
,
1657 Elf_Internal_Shdr
*symtab_hdr
;
1658 Elf_Internal_Rela
*internal_relocs
;
1659 Elf_Internal_Rela
*free_relocs
= NULL
;
1660 Elf_Internal_Rela
*irel
, *irelend
;
1661 bfd_byte
*contents
= NULL
;
1662 bfd_byte
*free_contents
= NULL
;
1667 struct elf_link_hash_entry
*sym_hash
;
1668 Elf_Internal_Sym
*isymbuf
, *isymend
;
1669 Elf_Internal_Sym
*isym
;
1674 /* We only do this once per section. We may be able to delete some code
1675 by running multiple passes, but it is not worth it. */
1678 /* Only do this for a text section. */
1679 if (link_info
->relocatable
1680 || (sec
->flags
& SEC_RELOC
) == 0
1681 || (sec
->reloc_count
== 0)
1682 || (sec
->flags
& SEC_CODE
) == 0)
1685 BFD_ASSERT ((sec
->size
> 0) || (sec
->rawsize
> 0));
1687 /* If this is the first time we have been called for this section,
1688 initialize the cooked size. */
1690 sec
->size
= sec
->rawsize
;
1692 /* Get symbols for this section. */
1693 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1694 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1695 symcount
= symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
1696 if (isymbuf
== NULL
)
1697 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
, symcount
,
1698 0, NULL
, NULL
, NULL
);
1699 BFD_ASSERT (isymbuf
!= NULL
);
1701 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, link_info
->keep_memory
);
1702 if (internal_relocs
== NULL
)
1704 if (! link_info
->keep_memory
)
1705 free_relocs
= internal_relocs
;
1707 sec
->relax
= (struct relax_table
*) bfd_malloc ((sec
->reloc_count
+ 1)
1708 * sizeof (struct relax_table
));
1709 if (sec
->relax
== NULL
)
1711 sec
->relax_count
= 0;
1713 irelend
= internal_relocs
+ sec
->reloc_count
;
1715 for (irel
= internal_relocs
; irel
< irelend
; irel
++, rel_count
++)
1718 if ((ELF32_R_TYPE (irel
->r_info
) != (int) R_MICROBLAZE_64_PCREL
)
1719 && (ELF32_R_TYPE (irel
->r_info
) != (int) R_MICROBLAZE_64
))
1720 continue; /* Can't delete this reloc. */
1722 /* Get the section contents. */
1723 if (contents
== NULL
)
1725 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1726 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1729 contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
1730 if (contents
== NULL
)
1732 free_contents
= contents
;
1734 if (!bfd_get_section_contents (abfd
, sec
, contents
,
1735 (file_ptr
) 0, sec
->size
))
1737 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1741 /* Get the value of the symbol referred to by the reloc. */
1742 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
1744 /* A local symbol. */
1747 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
1748 if (isym
->st_shndx
== SHN_UNDEF
)
1749 sym_sec
= bfd_und_section_ptr
;
1750 else if (isym
->st_shndx
== SHN_ABS
)
1751 sym_sec
= bfd_abs_section_ptr
;
1752 else if (isym
->st_shndx
== SHN_COMMON
)
1753 sym_sec
= bfd_com_section_ptr
;
1755 sym_sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1757 symval
= _bfd_elf_rela_local_sym (abfd
, isym
, &sym_sec
, irel
);
1762 struct elf_link_hash_entry
*h
;
1764 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
1765 h
= elf_sym_hashes (abfd
)[indx
];
1766 BFD_ASSERT (h
!= NULL
);
1768 if (h
->root
.type
!= bfd_link_hash_defined
1769 && h
->root
.type
!= bfd_link_hash_defweak
)
1770 /* This appears to be a reference to an undefined
1771 symbol. Just ignore it--it will be caught by the
1772 regular reloc processing. */
1775 symval
= (h
->root
.u
.def
.value
1776 + h
->root
.u
.def
.section
->output_section
->vma
1777 + h
->root
.u
.def
.section
->output_offset
);
1780 /* If this is a PC-relative reloc, subtract the instr offset from
1781 the symbol value. */
1782 if (ELF32_R_TYPE (irel
->r_info
) == (int) R_MICROBLAZE_64_PCREL
)
1784 symval
= symval
+ irel
->r_addend
1786 + sec
->output_section
->vma
1787 + sec
->output_offset
);
1790 symval
+= irel
->r_addend
;
1792 if ((symval
& 0xffff8000) == 0
1793 || (symval
& 0xffff8000) == 0xffff8000)
1795 /* We can delete this instruction. */
1796 sec
->relax
[sec
->relax_count
].addr
= irel
->r_offset
;
1797 sec
->relax
[sec
->relax_count
].size
= INST_WORD_SIZE
;
1800 /* Rewrite relocation type. */
1801 switch ((enum elf_microblaze_reloc_type
) ELF32_R_TYPE (irel
->r_info
))
1803 case R_MICROBLAZE_64_PCREL
:
1804 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1805 (int) R_MICROBLAZE_32_PCREL_LO
);
1807 case R_MICROBLAZE_64
:
1808 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1809 (int) R_MICROBLAZE_32_LO
);
1812 /* Cannot happen. */
1816 } /* Loop through all relocations. */
1818 /* Loop through the relocs again, and see if anything needs to change. */
1819 if (sec
->relax_count
> 0)
1821 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
1823 sec
->relax
[sec
->relax_count
].addr
= sec
->size
;
1825 for (irel
= internal_relocs
; irel
< irelend
; irel
++, rel_count
++)
1829 /* Get the new reloc address. */
1830 nraddr
= irel
->r_offset
- calc_fixup (irel
->r_offset
, sec
);
1831 switch ((enum elf_microblaze_reloc_type
) ELF32_R_TYPE (irel
->r_info
))
1835 case R_MICROBLAZE_64_PCREL
:
1837 case R_MICROBLAZE_64
:
1838 case R_MICROBLAZE_32_LO
:
1839 /* If this reloc is against a symbol defined in this
1840 section, we must check the addend to see it will put the value in
1841 range to be adjusted, and hence must be changed. */
1842 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
1844 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
1845 /* Only handle relocs against .text. */
1846 if (isym
->st_shndx
== shndx
1847 && ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
)
1848 irel
->r_addend
-= calc_fixup (irel
->r_addend
, sec
);
1851 case R_MICROBLAZE_NONE
:
1853 /* This was a PC-relative instruction that was
1854 completely resolved. */
1856 bfd_vma target_address
;
1857 target_address
= irel
->r_addend
+ irel
->r_offset
;
1858 sfix
= calc_fixup (irel
->r_offset
, sec
);
1859 efix
= calc_fixup (target_address
, sec
);
1860 irel
->r_addend
-= (efix
- sfix
);
1861 /* Should use HOWTO. */
1862 microblaze_bfd_write_imm_value_32 (abfd
, contents
+ irel
->r_offset
,
1866 case R_MICROBLAZE_64_NONE
:
1868 /* This was a PC-relative 64-bit instruction that was
1869 completely resolved. */
1871 bfd_vma target_address
;
1872 target_address
= irel
->r_addend
+ irel
->r_offset
+ INST_WORD_SIZE
;
1873 sfix
= calc_fixup (irel
->r_offset
+ INST_WORD_SIZE
, sec
);
1874 efix
= calc_fixup (target_address
, sec
);
1875 irel
->r_addend
-= (efix
- sfix
);
1876 microblaze_bfd_write_imm_value_32 (abfd
, contents
+ irel
->r_offset
1877 + INST_WORD_SIZE
, irel
->r_addend
);
1881 irel
->r_offset
= nraddr
;
1882 } /* Change all relocs in this section. */
1884 /* Look through all other sections. */
1885 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1887 Elf_Internal_Rela
*irelocs
;
1888 Elf_Internal_Rela
*irelscan
, *irelscanend
;
1889 bfd_byte
*ocontents
;
1892 || (o
->flags
& SEC_RELOC
) == 0
1893 || o
->reloc_count
== 0)
1896 /* We always cache the relocs. Perhaps, if info->keep_memory is
1897 FALSE, we should free them, if we are permitted to. */
1899 irelocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
, TRUE
);
1900 if (irelocs
== NULL
)
1904 irelscanend
= irelocs
+ o
->reloc_count
;
1905 for (irelscan
= irelocs
; irelscan
< irelscanend
; irelscan
++)
1907 if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32
)
1909 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1911 /* Look at the reloc only if the value has been resolved. */
1912 if (isym
->st_shndx
== shndx
1913 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
1915 if (ocontents
== NULL
)
1917 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1918 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1921 /* We always cache the section contents.
1922 Perhaps, if info->keep_memory is FALSE, we
1923 should free them, if we are permitted to. */
1924 if (o
->rawsize
== 0)
1925 o
->rawsize
= o
->size
;
1926 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1927 if (ocontents
== NULL
)
1929 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1933 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1937 irelscan
->r_addend
-= calc_fixup (irelscan
->r_addend
, sec
);
1939 else if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_SYM_OP_SYM
)
1941 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1943 /* Look at the reloc only if the value has been resolved. */
1944 if (ocontents
== NULL
)
1946 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1947 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1950 /* We always cache the section contents.
1951 Perhaps, if info->keep_memory is FALSE, we
1952 should free them, if we are permitted to. */
1954 if (o
->rawsize
== 0)
1955 o
->rawsize
= o
->size
;
1956 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1957 if (ocontents
== NULL
)
1959 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1963 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1966 irelscan
->r_addend
-= calc_fixup (irel
->r_addend
1971 else if ((ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_PCREL_LO
)
1972 || (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_LO
))
1974 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1976 /* Look at the reloc only if the value has been resolved. */
1977 if (isym
->st_shndx
== shndx
1978 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
1981 bfd_vma target_address
;
1983 if (ocontents
== NULL
)
1985 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1986 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1989 /* We always cache the section contents.
1990 Perhaps, if info->keep_memory is FALSE, we
1991 should free them, if we are permitted to. */
1992 if (o
->rawsize
== 0)
1993 o
->rawsize
= o
->size
;
1994 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1995 if (ocontents
== NULL
)
1997 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2001 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2005 unsigned long instr
= bfd_get_32 (abfd
, ocontents
+ irelscan
->r_offset
);
2006 immediate
= instr
& 0x0000ffff;
2007 target_address
= immediate
;
2008 offset
= calc_fixup (target_address
, sec
);
2009 immediate
-= offset
;
2010 irelscan
->r_addend
-= offset
;
2011 microblaze_bfd_write_imm_value_32 (abfd
, ocontents
+ irelscan
->r_offset
,
2012 irelscan
->r_addend
);
2016 if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_64
)
2018 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
2020 /* Look at the reloc only if the value has been resolved. */
2021 if (isym
->st_shndx
== shndx
2022 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
2026 if (ocontents
== NULL
)
2028 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
2029 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
2032 /* We always cache the section contents.
2033 Perhaps, if info->keep_memory is FALSE, we
2034 should free them, if we are permitted to. */
2036 if (o
->rawsize
== 0)
2037 o
->rawsize
= o
->size
;
2038 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
2039 if (ocontents
== NULL
)
2041 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2045 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2048 unsigned long instr_hi
= bfd_get_32 (abfd
, ocontents
2049 + irelscan
->r_offset
);
2050 unsigned long instr_lo
= bfd_get_32 (abfd
, ocontents
2051 + irelscan
->r_offset
2053 immediate
= (instr_hi
& 0x0000ffff) << 16;
2054 immediate
|= (instr_lo
& 0x0000ffff);
2055 offset
= calc_fixup (irelscan
->r_addend
, sec
);
2056 immediate
-= offset
;
2057 irelscan
->r_addend
-= offset
;
2060 else if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_64_PCREL
)
2062 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
2064 /* Look at the reloc only if the value has been resolved. */
2065 if (isym
->st_shndx
== shndx
2066 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
2069 bfd_vma target_address
;
2071 if (ocontents
== NULL
)
2073 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
2074 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
2077 /* We always cache the section contents.
2078 Perhaps, if info->keep_memory is FALSE, we
2079 should free them, if we are permitted to. */
2080 if (o
->rawsize
== 0)
2081 o
->rawsize
= o
->size
;
2082 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
2083 if (ocontents
== NULL
)
2085 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2089 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2092 unsigned long instr_hi
= bfd_get_32 (abfd
, ocontents
2093 + irelscan
->r_offset
);
2094 unsigned long instr_lo
= bfd_get_32 (abfd
, ocontents
2095 + irelscan
->r_offset
2097 immediate
= (instr_hi
& 0x0000ffff) << 16;
2098 immediate
|= (instr_lo
& 0x0000ffff);
2099 target_address
= immediate
;
2100 offset
= calc_fixup (target_address
, sec
);
2101 immediate
-= offset
;
2102 irelscan
->r_addend
-= offset
;
2103 microblaze_bfd_write_imm_value_64 (abfd
, ocontents
2104 + irelscan
->r_offset
, immediate
);
2110 /* Adjust the local symbols defined in this section. */
2111 isymend
= isymbuf
+ symtab_hdr
->sh_info
;
2112 for (isym
= isymbuf
; isym
< isymend
; isym
++)
2114 if (isym
->st_shndx
== shndx
)
2115 isym
->st_value
=- calc_fixup (isym
->st_value
, sec
);
2118 /* Now adjust the global symbols defined in this section. */
2119 isym
= isymbuf
+ symtab_hdr
->sh_info
;
2120 isymend
= isymbuf
+ (symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
));
2121 for (sym_index
= 0; isym
< isymend
; isym
++, sym_index
++)
2123 sym_hash
= elf_sym_hashes (abfd
)[sym_index
];
2124 if (isym
->st_shndx
== shndx
2125 && (sym_hash
->root
.type
== bfd_link_hash_defined
2126 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
2127 && sym_hash
->root
.u
.def
.section
== sec
)
2129 sym_hash
->root
.u
.def
.value
-= calc_fixup (sym_hash
->root
.u
.def
.value
,
2134 /* Physically move the code and change the cooked size. */
2135 dest
= sec
->relax
[0].addr
;
2136 for (i
= 0; i
< sec
->relax_count
; i
++)
2139 src
= sec
->relax
[i
].addr
+ sec
->relax
[i
].size
;
2140 len
= sec
->relax
[i
+1].addr
- sec
->relax
[i
].addr
- sec
->relax
[i
].size
;
2142 memmove (contents
+ dest
, contents
+ src
, len
);
2143 sec
->size
-= sec
->relax
[i
].size
;
2147 elf_section_data (sec
)->relocs
= internal_relocs
;
2150 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2151 free_contents
= NULL
;
2153 symtab_hdr
->contents
= (bfd_byte
*) isymbuf
;
2156 if (free_relocs
!= NULL
)
2162 if (free_contents
!= NULL
)
2164 if (!link_info
->keep_memory
)
2165 free (free_contents
);
2167 /* Cache the section contents for elf_link_input_bfd. */
2168 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2169 free_contents
= NULL
;
2172 if (sec
->relax_count
== 0)
2183 if (free_relocs
!= NULL
)
2185 if (free_contents
!= NULL
)
2186 free (free_contents
);
2187 if (sec
->relax
!= NULL
)
2191 sec
->relax_count
= 0;
2196 /* Return the section that should be marked against GC for a given
2200 microblaze_elf_gc_mark_hook (asection
*sec
,
2201 struct bfd_link_info
* info
,
2202 Elf_Internal_Rela
* rel
,
2203 struct elf_link_hash_entry
* h
,
2204 Elf_Internal_Sym
* sym
)
2207 switch (ELF32_R_TYPE (rel
->r_info
))
2209 case R_MICROBLAZE_GNU_VTINHERIT
:
2210 case R_MICROBLAZE_GNU_VTENTRY
:
2214 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2217 /* Update the got entry reference counts for the section being removed. */
2220 microblaze_elf_gc_sweep_hook (bfd
* abfd ATTRIBUTE_UNUSED
,
2221 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
2222 asection
* sec ATTRIBUTE_UNUSED
,
2223 const Elf_Internal_Rela
* relocs ATTRIBUTE_UNUSED
)
2230 #define PLT_ENTRY_SIZE 16
2232 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2233 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2234 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2235 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2236 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2238 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
2239 shortcuts to them in our hash table. */
2242 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
2244 struct elf32_mb_link_hash_table
*htab
;
2246 if (! _bfd_elf_create_got_section (dynobj
, info
))
2248 htab
= elf32_mb_hash_table (info
);
2252 htab
->sgot
= bfd_get_linker_section (dynobj
, ".got");
2253 htab
->sgotplt
= bfd_get_linker_section (dynobj
, ".got.plt");
2254 if (!htab
->sgot
|| !htab
->sgotplt
)
2257 if ((htab
->srelgot
= bfd_get_linker_section (dynobj
, ".rela.got")) == NULL
)
2258 htab
->srelgot
= bfd_make_section_anyway (dynobj
, ".rela.got");
2259 if (htab
->srelgot
== NULL
2260 || ! bfd_set_section_flags (dynobj
, htab
->srelgot
, SEC_ALLOC
2264 | SEC_LINKER_CREATED
2266 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
2272 update_local_sym_info (bfd
*abfd
,
2273 Elf_Internal_Shdr
*symtab_hdr
,
2274 unsigned long r_symndx
,
2275 unsigned int tls_type
)
2277 bfd_signed_vma
*local_got_refcounts
= elf_local_got_refcounts (abfd
);
2278 unsigned char *local_got_tls_masks
;
2280 if (local_got_refcounts
== NULL
)
2282 bfd_size_type size
= symtab_hdr
->sh_info
;
2284 size
*= (sizeof (*local_got_refcounts
) + sizeof (*local_got_tls_masks
));
2285 local_got_refcounts
= bfd_zalloc (abfd
, size
);
2286 if (local_got_refcounts
== NULL
)
2288 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2291 local_got_tls_masks
=
2292 (unsigned char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2293 local_got_tls_masks
[r_symndx
] |= tls_type
;
2294 local_got_refcounts
[r_symndx
] += 1;
2298 /* Look through the relocs for a section during the first phase. */
2301 microblaze_elf_check_relocs (bfd
* abfd
,
2302 struct bfd_link_info
* info
,
2304 const Elf_Internal_Rela
* relocs
)
2306 Elf_Internal_Shdr
* symtab_hdr
;
2307 struct elf_link_hash_entry
** sym_hashes
;
2308 struct elf_link_hash_entry
** sym_hashes_end
;
2309 const Elf_Internal_Rela
* rel
;
2310 const Elf_Internal_Rela
* rel_end
;
2311 struct elf32_mb_link_hash_table
*htab
;
2312 asection
*sreloc
= NULL
;
2314 if (info
->relocatable
)
2317 htab
= elf32_mb_hash_table (info
);
2321 symtab_hdr
= & elf_tdata (abfd
)->symtab_hdr
;
2322 sym_hashes
= elf_sym_hashes (abfd
);
2323 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
2324 if (!elf_bad_symtab (abfd
))
2325 sym_hashes_end
-= symtab_hdr
->sh_info
;
2327 rel_end
= relocs
+ sec
->reloc_count
;
2329 for (rel
= relocs
; rel
< rel_end
; rel
++)
2331 unsigned int r_type
;
2332 struct elf_link_hash_entry
* h
;
2333 unsigned long r_symndx
;
2334 unsigned char tls_type
= 0;
2336 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2337 r_type
= ELF32_R_TYPE (rel
->r_info
);
2339 if (r_symndx
< symtab_hdr
->sh_info
)
2342 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2346 /* This relocation describes the C++ object vtable hierarchy.
2347 Reconstruct it for later use during GC. */
2348 case R_MICROBLAZE_GNU_VTINHERIT
:
2349 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2353 /* This relocation describes which C++ vtable entries are actually
2354 used. Record for later use during GC. */
2355 case R_MICROBLAZE_GNU_VTENTRY
:
2356 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2360 /* This relocation requires .plt entry. */
2361 case R_MICROBLAZE_PLT_64
:
2365 h
->plt
.refcount
+= 1;
2369 /* This relocation requires .got entry. */
2370 case R_MICROBLAZE_TLSGD
:
2371 tls_type
|= (TLS_TLS
| TLS_GD
);
2373 case R_MICROBLAZE_TLSLD
:
2374 tls_type
|= (TLS_TLS
| TLS_LD
);
2376 sec
->has_tls_reloc
= 1;
2377 case R_MICROBLAZE_GOT_64
:
2378 if (htab
->sgot
== NULL
)
2380 if (htab
->elf
.dynobj
== NULL
)
2381 htab
->elf
.dynobj
= abfd
;
2382 if (!create_got_section (htab
->elf
.dynobj
, info
))
2387 h
->got
.refcount
+= 1;
2388 elf32_mb_hash_entry (h
)->tls_mask
|= tls_type
;
2392 if (! update_local_sym_info(abfd
, symtab_hdr
, r_symndx
, tls_type
) )
2397 case R_MICROBLAZE_64
:
2398 case R_MICROBLAZE_64_PCREL
:
2399 case R_MICROBLAZE_32
:
2401 if (h
!= NULL
&& !info
->shared
)
2403 /* we may need a copy reloc. */
2406 /* we may also need a .plt entry. */
2407 h
->plt
.refcount
+= 1;
2408 if (ELF32_R_TYPE (rel
->r_info
) != R_MICROBLAZE_64_PCREL
)
2409 h
->pointer_equality_needed
= 1;
2413 /* If we are creating a shared library, and this is a reloc
2414 against a global symbol, or a non PC relative reloc
2415 against a local symbol, then we need to copy the reloc
2416 into the shared library. However, if we are linking with
2417 -Bsymbolic, we do not need to copy a reloc against a
2418 global symbol which is defined in an object we are
2419 including in the link (i.e., DEF_REGULAR is set). At
2420 this point we have not seen all the input files, so it is
2421 possible that DEF_REGULAR is not set now but will be set
2422 later (it is never cleared). In case of a weak definition,
2423 DEF_REGULAR may be cleared later by a strong definition in
2424 a shared library. We account for that possibility below by
2425 storing information in the relocs_copied field of the hash
2426 table entry. A similar situation occurs when creating
2427 shared libraries and symbol visibility changes render the
2430 If on the other hand, we are creating an executable, we
2431 may need to keep relocations for symbols satisfied by a
2432 dynamic library if we manage to avoid copy relocs for the
2436 && (sec
->flags
& SEC_ALLOC
) != 0
2437 && (r_type
!= R_MICROBLAZE_64_PCREL
2439 && (! info
->symbolic
2440 || h
->root
.type
== bfd_link_hash_defweak
2441 || !h
->def_regular
))))
2443 && (sec
->flags
& SEC_ALLOC
) != 0
2445 && (h
->root
.type
== bfd_link_hash_defweak
2446 || !h
->def_regular
)))
2448 struct elf32_mb_dyn_relocs
*p
;
2449 struct elf32_mb_dyn_relocs
**head
;
2451 /* When creating a shared object, we must copy these
2452 relocs into the output file. We create a reloc
2453 section in dynobj and make room for the reloc. */
2459 if (htab
->elf
.dynobj
== NULL
)
2460 htab
->elf
.dynobj
= abfd
;
2461 dynobj
= htab
->elf
.dynobj
;
2463 sreloc
= _bfd_elf_make_dynamic_reloc_section (sec
, dynobj
,
2469 /* If this is a global symbol, we count the number of
2470 relocations we need for this symbol. */
2472 head
= &((struct elf32_mb_link_hash_entry
*) h
)->dyn_relocs
;
2475 /* Track dynamic relocs needed for local syms too.
2476 We really need local syms available to do this
2480 Elf_Internal_Sym
*isym
;
2483 isym
= bfd_sym_from_r_symndx (&htab
->sym_sec
,
2488 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2492 vpp
= &elf_section_data (s
)->local_dynrel
;
2493 head
= (struct elf32_mb_dyn_relocs
**) vpp
;
2497 if (p
== NULL
|| p
->sec
!= sec
)
2499 bfd_size_type amt
= sizeof *p
;
2500 p
= ((struct elf32_mb_dyn_relocs
*)
2501 bfd_alloc (htab
->elf
.dynobj
, amt
));
2512 if (r_type
== R_MICROBLAZE_64_PCREL
)
2524 microblaze_elf_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
2526 struct elf32_mb_link_hash_table
*htab
;
2528 htab
= elf32_mb_hash_table (info
);
2532 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
2535 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
2538 htab
->splt
= bfd_get_linker_section (dynobj
, ".plt");
2539 htab
->srelplt
= bfd_get_linker_section (dynobj
, ".rela.plt");
2540 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
2542 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
2544 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
2545 || (!info
->shared
&& !htab
->srelbss
))
2551 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2554 microblaze_elf_copy_indirect_symbol (struct bfd_link_info
*info
,
2555 struct elf_link_hash_entry
*dir
,
2556 struct elf_link_hash_entry
*ind
)
2558 struct elf32_mb_link_hash_entry
*edir
, *eind
;
2560 edir
= (struct elf32_mb_link_hash_entry
*) dir
;
2561 eind
= (struct elf32_mb_link_hash_entry
*) ind
;
2563 if (eind
->dyn_relocs
!= NULL
)
2565 if (edir
->dyn_relocs
!= NULL
)
2567 struct elf32_mb_dyn_relocs
**pp
;
2568 struct elf32_mb_dyn_relocs
*p
;
2570 if (ind
->root
.type
== bfd_link_hash_indirect
)
2573 /* Add reloc counts against the weak sym to the strong sym
2574 list. Merge any entries against the same section. */
2575 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
2577 struct elf32_mb_dyn_relocs
*q
;
2579 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2580 if (q
->sec
== p
->sec
)
2582 q
->pc_count
+= p
->pc_count
;
2583 q
->count
+= p
->count
;
2590 *pp
= edir
->dyn_relocs
;
2593 edir
->dyn_relocs
= eind
->dyn_relocs
;
2594 eind
->dyn_relocs
= NULL
;
2597 edir
->tls_mask
|= eind
->tls_mask
;
2599 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2603 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2604 struct elf_link_hash_entry
*h
)
2606 struct elf32_mb_link_hash_table
*htab
;
2607 struct elf32_mb_link_hash_entry
* eh
;
2608 struct elf32_mb_dyn_relocs
*p
;
2609 asection
*sdynbss
, *s
;
2610 unsigned int power_of_two
;
2613 htab
= elf32_mb_hash_table (info
);
2617 /* If this is a function, put it in the procedure linkage table. We
2618 will fill in the contents of the procedure linkage table later,
2619 when we know the address of the .got section. */
2620 if (h
->type
== STT_FUNC
2623 if (h
->plt
.refcount
<= 0
2624 || SYMBOL_CALLS_LOCAL (info
, h
)
2625 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2626 && h
->root
.type
== bfd_link_hash_undefweak
))
2628 /* This case can occur if we saw a PLT reloc in an input
2629 file, but the symbol was never referred to by a dynamic
2630 object, or if all references were garbage collected. In
2631 such a case, we don't actually need to build a procedure
2632 linkage table, and we can just do a PC32 reloc instead. */
2633 h
->plt
.offset
= (bfd_vma
) -1;
2640 /* It's possible that we incorrectly decided a .plt reloc was
2641 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2642 check_relocs. We can't decide accurately between function and
2643 non-function syms in check-relocs; Objects loaded later in
2644 the link may change h->type. So fix it now. */
2645 h
->plt
.offset
= (bfd_vma
) -1;
2647 /* If this is a weak symbol, and there is a real definition, the
2648 processor independent code will have arranged for us to see the
2649 real definition first, and we can just use the same value. */
2650 if (h
->u
.weakdef
!= NULL
)
2652 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2653 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2654 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2655 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2659 /* This is a reference to a symbol defined by a dynamic object which
2660 is not a function. */
2662 /* If we are creating a shared library, we must presume that the
2663 only references to the symbol are via the global offset table.
2664 For such cases we need not do anything here; the relocations will
2665 be handled correctly by relocate_section. */
2669 /* If there are no references to this symbol that do not use the
2670 GOT, we don't need to generate a copy reloc. */
2671 if (!h
->non_got_ref
)
2674 /* If -z nocopyreloc was given, we won't generate them either. */
2675 if (info
->nocopyreloc
)
2681 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2682 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2684 s
= p
->sec
->output_section
;
2685 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2689 /* If we didn't find any dynamic relocs in read-only sections, then
2690 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2697 /* We must allocate the symbol in our .dynbss section, which will
2698 become part of the .bss section of the executable. There will be
2699 an entry for this symbol in the .dynsym section. The dynamic
2700 object will contain position independent code, so all references
2701 from the dynamic object to this symbol will go through the global
2702 offset table. The dynamic linker will use the .dynsym entry to
2703 determine the address it must put in the global offset table, so
2704 both the dynamic object and the regular object will refer to the
2705 same memory location for the variable. */
2707 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2708 to copy the initial value out of the dynamic object and into the
2709 runtime process image. */
2710 dynobj
= elf_hash_table (info
)->dynobj
;
2711 BFD_ASSERT (dynobj
!= NULL
);
2712 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2714 htab
->srelbss
->size
+= sizeof (Elf32_External_Rela
);
2718 /* We need to figure out the alignment required for this symbol. I
2719 have no idea how ELF linkers handle this. */
2720 power_of_two
= bfd_log2 (h
->size
);
2721 if (power_of_two
> 3)
2724 sdynbss
= htab
->sdynbss
;
2725 /* Apply the required alignment. */
2726 sdynbss
->size
= BFD_ALIGN (sdynbss
->size
, (bfd_size_type
) (1 << power_of_two
));
2727 if (power_of_two
> bfd_get_section_alignment (dynobj
, sdynbss
))
2729 if (! bfd_set_section_alignment (dynobj
, sdynbss
, power_of_two
))
2733 /* Define the symbol as being at this point in the section. */
2734 h
->root
.u
.def
.section
= sdynbss
;
2735 h
->root
.u
.def
.value
= sdynbss
->size
;
2737 /* Increment the section size to make room for the symbol. */
2738 sdynbss
->size
+= h
->size
;
2742 /* Allocate space in .plt, .got and associated reloc sections for
2746 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * dat
)
2748 struct bfd_link_info
*info
;
2749 struct elf32_mb_link_hash_table
*htab
;
2750 struct elf32_mb_link_hash_entry
*eh
;
2751 struct elf32_mb_dyn_relocs
*p
;
2753 if (h
->root
.type
== bfd_link_hash_indirect
)
2756 info
= (struct bfd_link_info
*) dat
;
2757 htab
= elf32_mb_hash_table (info
);
2761 if (htab
->elf
.dynamic_sections_created
2762 && h
->plt
.refcount
> 0)
2764 /* Make sure this symbol is output as a dynamic symbol.
2765 Undefined weak syms won't yet be marked as dynamic. */
2766 if (h
->dynindx
== -1
2767 && !h
->forced_local
)
2769 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2773 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info
->shared
, h
))
2775 asection
*s
= htab
->splt
;
2777 /* The first entry in .plt is reserved. */
2779 s
->size
= PLT_ENTRY_SIZE
;
2781 h
->plt
.offset
= s
->size
;
2783 /* If this symbol is not defined in a regular file, and we are
2784 not generating a shared library, then set the symbol to this
2785 location in the .plt. This is required to make function
2786 pointers compare as equal between the normal executable and
2787 the shared library. */
2791 h
->root
.u
.def
.section
= s
;
2792 h
->root
.u
.def
.value
= h
->plt
.offset
;
2795 /* Make room for this entry. */
2796 s
->size
+= PLT_ENTRY_SIZE
;
2798 /* We also need to make an entry in the .got.plt section, which
2799 will be placed in the .got section by the linker script. */
2800 htab
->sgotplt
->size
+= 4;
2802 /* We also need to make an entry in the .rel.plt section. */
2803 htab
->srelplt
->size
+= sizeof (Elf32_External_Rela
);
2807 h
->plt
.offset
= (bfd_vma
) -1;
2813 h
->plt
.offset
= (bfd_vma
) -1;
2817 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2818 if (h
->got
.refcount
> 0)
2823 /* Make sure this symbol is output as a dynamic symbol.
2824 Undefined weak syms won't yet be marked as dynamic. */
2825 if (h
->dynindx
== -1
2826 && !h
->forced_local
)
2828 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2833 if ((eh
->tls_mask
& TLS_TLS
) != 0)
2835 /* Handle TLS Symbol */
2836 if ((eh
->tls_mask
& TLS_LD
) != 0)
2838 if (!eh
->elf
.def_dynamic
)
2839 /* We'll just use htab->tlsld_got.offset. This should
2840 always be the case. It's a little odd if we have
2841 a local dynamic reloc against a non-local symbol. */
2842 htab
->tlsld_got
.refcount
+= 1;
2846 if ((eh
->tls_mask
& TLS_GD
) != 0)
2851 /* Regular (non-TLS) symbol */
2856 h
->got
.offset
= (bfd_vma
) -1;
2861 h
->got
.offset
= s
->size
;
2863 htab
->srelgot
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
2867 h
->got
.offset
= (bfd_vma
) -1;
2869 if (eh
->dyn_relocs
== NULL
)
2872 /* In the shared -Bsymbolic case, discard space allocated for
2873 dynamic pc-relative relocs against symbols which turn out to be
2874 defined in regular objects. For the normal shared case, discard
2875 space for pc-relative relocs that have become local due to symbol
2876 visibility changes. */
2884 struct elf32_mb_dyn_relocs
**pp
;
2886 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2888 p
->count
-= p
->pc_count
;
2899 /* For the non-shared case, discard space for relocs against
2900 symbols which turn out to need copy relocs or are not
2906 || (htab
->elf
.dynamic_sections_created
2907 && (h
->root
.type
== bfd_link_hash_undefweak
2908 || h
->root
.type
== bfd_link_hash_undefined
))))
2910 /* Make sure this symbol is output as a dynamic symbol.
2911 Undefined weak syms won't yet be marked as dynamic. */
2912 if (h
->dynindx
== -1
2913 && !h
->forced_local
)
2915 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2919 /* If that succeeded, we know we'll be keeping all the
2921 if (h
->dynindx
!= -1)
2925 eh
->dyn_relocs
= NULL
;
2930 /* Finally, allocate space. */
2931 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2933 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
2934 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2940 /* Set the sizes of the dynamic sections. */
2943 microblaze_elf_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2944 struct bfd_link_info
*info
)
2946 struct elf32_mb_link_hash_table
*htab
;
2951 htab
= elf32_mb_hash_table (info
);
2955 dynobj
= htab
->elf
.dynobj
;
2956 BFD_ASSERT (dynobj
!= NULL
);
2958 /* Set up .got offsets for local syms, and space for local dynamic
2960 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2962 bfd_signed_vma
*local_got
;
2963 bfd_signed_vma
*end_local_got
;
2964 bfd_size_type locsymcount
;
2965 Elf_Internal_Shdr
*symtab_hdr
;
2966 unsigned char *lgot_masks
;
2969 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2972 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2974 struct elf32_mb_dyn_relocs
*p
;
2976 for (p
= ((struct elf32_mb_dyn_relocs
*)
2977 elf_section_data (s
)->local_dynrel
);
2981 if (!bfd_is_abs_section (p
->sec
)
2982 && bfd_is_abs_section (p
->sec
->output_section
))
2984 /* Input section has been discarded, either because
2985 it is a copy of a linkonce section or due to
2986 linker script /DISCARD/, so we'll be discarding
2989 else if (p
->count
!= 0)
2991 srel
= elf_section_data (p
->sec
)->sreloc
;
2992 srel
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2993 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2994 info
->flags
|= DF_TEXTREL
;
2999 local_got
= elf_local_got_refcounts (ibfd
);
3003 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
3004 locsymcount
= symtab_hdr
->sh_info
;
3005 end_local_got
= local_got
+ locsymcount
;
3006 lgot_masks
= (unsigned char *) end_local_got
;
3008 srel
= htab
->srelgot
;
3010 for (; local_got
< end_local_got
; ++local_got
, ++lgot_masks
)
3014 unsigned int need
= 0;
3015 if ((*lgot_masks
& TLS_TLS
) != 0)
3017 if ((*lgot_masks
& TLS_GD
) != 0)
3019 if ((*lgot_masks
& TLS_LD
) != 0)
3020 htab
->tlsld_got
.refcount
+= 1;
3027 *local_got
= (bfd_vma
) -1;
3031 *local_got
= s
->size
;
3034 srel
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
3038 *local_got
= (bfd_vma
) -1;
3042 /* Allocate global sym .plt and .got entries, and space for global
3043 sym dynamic relocs. */
3044 elf_link_hash_traverse (elf_hash_table (info
), allocate_dynrelocs
, info
);
3046 if (htab
->tlsld_got
.refcount
> 0)
3048 htab
->tlsld_got
.offset
= htab
->sgot
->size
;
3049 htab
->sgot
->size
+= 8;
3051 htab
->srelgot
->size
+= sizeof (Elf32_External_Rela
);
3054 htab
->tlsld_got
.offset
= (bfd_vma
) -1;
3056 if (elf_hash_table (info
)->dynamic_sections_created
)
3058 /* Make space for the trailing nop in .plt. */
3059 if (htab
->splt
->size
> 0)
3060 htab
->splt
->size
+= 4;
3063 /* The check_relocs and adjust_dynamic_symbol entry points have
3064 determined the sizes of the various dynamic sections. Allocate
3066 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3069 bfd_boolean strip
= FALSE
;
3071 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3074 /* It's OK to base decisions on the section name, because none
3075 of the dynobj section names depend upon the input files. */
3076 name
= bfd_get_section_name (dynobj
, s
);
3078 if (strncmp (name
, ".rela", 5) == 0)
3082 /* If we don't need this section, strip it from the
3083 output file. This is to handle .rela.bss and
3084 .rela.plt. We must create it in
3085 create_dynamic_sections, because it must be created
3086 before the linker maps input sections to output
3087 sections. The linker does that before
3088 adjust_dynamic_symbol is called, and it is that
3089 function which decides whether anything needs to go
3090 into these sections. */
3095 /* We use the reloc_count field as a counter if we need
3096 to copy relocs into the output file. */
3100 else if (s
!= htab
->splt
&& s
!= htab
->sgot
&& s
!= htab
->sgotplt
)
3102 /* It's not one of our sections, so don't allocate space. */
3108 s
->flags
|= SEC_EXCLUDE
;
3112 /* Allocate memory for the section contents. */
3113 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3114 Unused entries should be reclaimed before the section's contents
3115 are written out, but at the moment this does not happen. Thus in
3116 order to prevent writing out garbage, we initialise the section's
3117 contents to zero. */
3118 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3119 if (s
->contents
== NULL
&& s
->size
!= 0)
3123 if (elf_hash_table (info
)->dynamic_sections_created
)
3125 /* Add some entries to the .dynamic section. We fill in the
3126 values later, in microblaze_elf_finish_dynamic_sections, but we
3127 must add the entries now so that we get the correct size for
3128 the .dynamic section. The DT_DEBUG entry is filled in by the
3129 dynamic linker and used by the debugger. */
3130 #define add_dynamic_entry(TAG, VAL) \
3131 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3133 if (info
->executable
)
3135 if (!add_dynamic_entry (DT_DEBUG
, 0))
3139 if (!add_dynamic_entry (DT_RELA
, 0)
3140 || !add_dynamic_entry (DT_RELASZ
, 0)
3141 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3144 if (htab
->splt
->size
!= 0)
3146 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3147 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3148 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3149 || !add_dynamic_entry (DT_JMPREL
, 0)
3150 || !add_dynamic_entry (DT_BIND_NOW
, 1))
3154 if (info
->flags
& DF_TEXTREL
)
3156 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3160 #undef add_dynamic_entry
3164 /* Finish up dynamic symbol handling. We set the contents of various
3165 dynamic sections here. */
3168 microblaze_elf_finish_dynamic_symbol (bfd
*output_bfd
,
3169 struct bfd_link_info
*info
,
3170 struct elf_link_hash_entry
*h
,
3171 Elf_Internal_Sym
*sym
)
3173 struct elf32_mb_link_hash_table
*htab
;
3174 struct elf32_mb_link_hash_entry
*eh
= elf32_mb_hash_entry(h
);
3176 htab
= elf32_mb_hash_table (info
);
3180 if (h
->plt
.offset
!= (bfd_vma
) -1)
3185 Elf_Internal_Rela rela
;
3191 /* This symbol has an entry in the procedure linkage table. Set
3193 BFD_ASSERT (h
->dynindx
!= -1);
3196 srela
= htab
->srelplt
;
3197 sgotplt
= htab
->sgotplt
;
3198 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
&& sgotplt
!= NULL
);
3200 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1; /* first entry reserved. */
3201 got_offset
= (plt_index
+ 3) * 4; /* 3 reserved ??? */
3202 got_addr
= got_offset
;
3204 /* For non-PIC objects we need absolute address of the GOT entry. */
3206 got_addr
+= htab
->sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
3208 /* Fill in the entry in the procedure linkage table. */
3209 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_0
+ ((got_addr
>> 16) & 0xffff),
3210 splt
->contents
+ h
->plt
.offset
);
3212 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1
+ (got_addr
& 0xffff),
3213 splt
->contents
+ h
->plt
.offset
+ 4);
3215 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1_NOPIC
+ (got_addr
& 0xffff),
3216 splt
->contents
+ h
->plt
.offset
+ 4);
3217 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_2
,
3218 splt
->contents
+ h
->plt
.offset
+ 8);
3219 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_3
,
3220 splt
->contents
+ h
->plt
.offset
+ 12);
3222 /* Any additions to the .got section??? */
3223 /* bfd_put_32 (output_bfd,
3224 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3225 sgotplt->contents + got_offset); */
3227 /* Fill in the entry in the .rela.plt section. */
3228 rela
.r_offset
= (sgotplt
->output_section
->vma
3229 + sgotplt
->output_offset
3231 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_JUMP_SLOT
);
3233 loc
= srela
->contents
;
3234 loc
+= plt_index
* sizeof (Elf32_External_Rela
);
3235 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3237 if (!h
->def_regular
)
3239 /* Mark the symbol as undefined, rather than as defined in
3240 the .plt section. Zero the value. */
3241 sym
->st_shndx
= SHN_UNDEF
;
3246 /* h->got.refcount to be checked ? */
3247 if (h
->got
.offset
!= (bfd_vma
) -1 &&
3248 ! ((h
->got
.offset
& 1) ||
3249 IS_TLS_LD(eh
->tls_mask
) || IS_TLS_GD(eh
->tls_mask
)))
3255 /* This symbol has an entry in the global offset table. Set it
3259 srela
= htab
->srelgot
;
3260 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
3262 offset
= (sgot
->output_section
->vma
+ sgot
->output_offset
3263 + (h
->got
.offset
&~ (bfd_vma
) 1));
3265 /* If this is a -Bsymbolic link, and the symbol is defined
3266 locally, we just want to emit a RELATIVE reloc. Likewise if
3267 the symbol was forced to be local because of a version file.
3268 The entry in the global offset table will already have been
3269 initialized in the relocate_section function. */
3271 && (info
->symbolic
|| h
->dynindx
== -1)
3274 asection
*sec
= h
->root
.u
.def
.section
;
3275 microblaze_elf_output_dynamic_relocation (output_bfd
,
3276 srela
, srela
->reloc_count
++,
3278 R_MICROBLAZE_REL
, offset
,
3280 + sec
->output_section
->vma
3281 + sec
->output_offset
);
3285 microblaze_elf_output_dynamic_relocation (output_bfd
,
3286 srela
, srela
->reloc_count
++,
3288 R_MICROBLAZE_GLOB_DAT
,
3292 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3293 sgot
->contents
+ (h
->got
.offset
&~ (bfd_vma
) 1));
3299 Elf_Internal_Rela rela
;
3302 /* This symbols needs a copy reloc. Set it up. */
3304 BFD_ASSERT (h
->dynindx
!= -1);
3306 s
= bfd_get_linker_section (htab
->elf
.dynobj
, ".rela.bss");
3307 BFD_ASSERT (s
!= NULL
);
3309 rela
.r_offset
= (h
->root
.u
.def
.value
3310 + h
->root
.u
.def
.section
->output_section
->vma
3311 + h
->root
.u
.def
.section
->output_offset
);
3312 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_COPY
);
3314 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3315 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3318 /* Mark some specially defined symbols as absolute. */
3319 if (h
== htab
->elf
.hdynamic
3320 || h
== htab
->elf
.hgot
3321 || h
== htab
->elf
.hplt
)
3322 sym
->st_shndx
= SHN_ABS
;
3328 /* Finish up the dynamic sections. */
3331 microblaze_elf_finish_dynamic_sections (bfd
*output_bfd
,
3332 struct bfd_link_info
*info
)
3335 asection
*sdyn
, *sgot
;
3336 struct elf32_mb_link_hash_table
*htab
;
3338 htab
= elf32_mb_hash_table (info
);
3342 dynobj
= htab
->elf
.dynobj
;
3344 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3346 if (htab
->elf
.dynamic_sections_created
)
3349 Elf32_External_Dyn
*dyncon
, *dynconend
;
3351 splt
= bfd_get_linker_section (dynobj
, ".plt");
3352 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
3354 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3355 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3356 for (; dyncon
< dynconend
; dyncon
++)
3358 Elf_Internal_Dyn dyn
;
3362 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3366 case DT_PLTGOT
: name
= ".got.plt"; size
= FALSE
; break;
3367 case DT_PLTRELSZ
: name
= ".rela.plt"; size
= TRUE
; break;
3368 case DT_JMPREL
: name
= ".rela.plt"; size
= FALSE
; break;
3369 case DT_RELA
: name
= ".rela.dyn"; size
= FALSE
; break;
3370 case DT_RELASZ
: name
= ".rela.dyn"; size
= TRUE
; break;
3371 default: name
= NULL
; size
= FALSE
; break;
3378 s
= bfd_get_section_by_name (output_bfd
, name
);
3384 dyn
.d_un
.d_ptr
= s
->vma
;
3386 dyn
.d_un
.d_val
= s
->size
;
3388 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3392 /* Clear the first entry in the procedure linkage table,
3393 and put a nop in the last four bytes. */
3396 memset (splt
->contents
, 0, PLT_ENTRY_SIZE
);
3397 bfd_put_32 (output_bfd
, (bfd_vma
) 0x80000000 /* nop. */,
3398 splt
->contents
+ splt
->size
- 4);
3401 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
3404 /* Set the first entry in the global offset table to the address of
3405 the dynamic section. */
3406 sgot
= bfd_get_linker_section (dynobj
, ".got.plt");
3407 if (sgot
&& sgot
->size
> 0)
3410 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
3412 bfd_put_32 (output_bfd
,
3413 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
3415 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3418 if (htab
->sgot
&& htab
->sgot
->size
> 0)
3419 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3424 /* Hook called by the linker routine which adds symbols from an object
3425 file. We use it to put .comm items in .sbss, and not .bss. */
3428 microblaze_elf_add_symbol_hook (bfd
*abfd
,
3429 struct bfd_link_info
*info
,
3430 Elf_Internal_Sym
*sym
,
3431 const char **namep ATTRIBUTE_UNUSED
,
3432 flagword
*flagsp ATTRIBUTE_UNUSED
,
3436 if (sym
->st_shndx
== SHN_COMMON
3437 && !info
->relocatable
3438 && sym
->st_size
<= elf_gp_size (abfd
))
3440 /* Common symbols less than or equal to -G nn bytes are automatically
3442 *secp
= bfd_make_section_old_way (abfd
, ".sbss");
3444 || ! bfd_set_section_flags (abfd
, *secp
, SEC_IS_COMMON
))
3447 *valp
= sym
->st_size
;
3453 #define TARGET_LITTLE_SYM bfd_elf32_microblazeel_vec
3454 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3456 #define TARGET_BIG_SYM bfd_elf32_microblaze_vec
3457 #define TARGET_BIG_NAME "elf32-microblaze"
3459 #define ELF_ARCH bfd_arch_microblaze
3460 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3461 #define ELF_MACHINE_CODE EM_MICROBLAZE
3462 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3463 #define ELF_MAXPAGESIZE 0x1000
3464 #define elf_info_to_howto microblaze_elf_info_to_howto
3465 #define elf_info_to_howto_rel NULL
3467 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3468 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3469 #define elf_backend_relocate_section microblaze_elf_relocate_section
3470 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3471 #define bfd_elf32_bfd_merge_private_bfd_data microblaze_elf_merge_private_bfd_data
3472 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3474 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3475 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3476 #define elf_backend_check_relocs microblaze_elf_check_relocs
3477 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3478 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3479 #define elf_backend_can_gc_sections 1
3480 #define elf_backend_can_refcount 1
3481 #define elf_backend_want_got_plt 1
3482 #define elf_backend_plt_readonly 1
3483 #define elf_backend_got_header_size 12
3484 #define elf_backend_rela_normal 1
3486 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3487 #define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections
3488 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3489 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3490 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3491 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3493 #include "elf32-target.h"