1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
3 Copyright (C) 2009-2017 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
30 #include "elf/microblaze.h"
33 #define USE_RELA /* Only USE_REL is actually significant, but this is
34 here are a reminder... */
35 #define INST_WORD_SIZE 4
37 static int ro_small_data_pointer
= 0;
38 static int rw_small_data_pointer
= 0;
40 static reloc_howto_type
* microblaze_elf_howto_table
[(int) R_MICROBLAZE_max
];
42 static reloc_howto_type microblaze_elf_howto_raw
[] =
44 /* This reloc does nothing. */
45 HOWTO (R_MICROBLAZE_NONE
, /* Type. */
47 3, /* Size (0 = byte, 1 = short, 2 = long). */
49 FALSE
, /* PC_relative. */
51 complain_overflow_dont
, /* Complain on overflow. */
52 NULL
, /* Special Function. */
53 "R_MICROBLAZE_NONE", /* Name. */
54 FALSE
, /* Partial Inplace. */
57 FALSE
), /* PC relative offset? */
59 /* A standard 32 bit relocation. */
60 HOWTO (R_MICROBLAZE_32
, /* Type. */
62 2, /* Size (0 = byte, 1 = short, 2 = long). */
64 FALSE
, /* PC_relative. */
66 complain_overflow_bitfield
, /* Complain on overflow. */
67 bfd_elf_generic_reloc
,/* Special Function. */
68 "R_MICROBLAZE_32", /* Name. */
69 FALSE
, /* Partial Inplace. */
71 0xffffffff, /* Dest Mask. */
72 FALSE
), /* PC relative offset? */
74 /* A standard PCREL 32 bit relocation. */
75 HOWTO (R_MICROBLAZE_32_PCREL
,/* Type. */
77 2, /* Size (0 = byte, 1 = short, 2 = long). */
79 TRUE
, /* PC_relative. */
81 complain_overflow_bitfield
, /* Complain on overflow. */
82 bfd_elf_generic_reloc
,/* Special Function. */
83 "R_MICROBLAZE_32_PCREL", /* Name. */
84 TRUE
, /* Partial Inplace. */
86 0xffffffff, /* Dest Mask. */
87 TRUE
), /* PC relative offset? */
89 /* A 64 bit PCREL relocation. Table-entry not really used. */
90 HOWTO (R_MICROBLAZE_64_PCREL
,/* Type. */
92 2, /* Size (0 = byte, 1 = short, 2 = long). */
94 TRUE
, /* PC_relative. */
96 complain_overflow_dont
, /* Complain on overflow. */
97 bfd_elf_generic_reloc
,/* Special Function. */
98 "R_MICROBLAZE_64_PCREL", /* Name. */
99 FALSE
, /* Partial Inplace. */
100 0, /* Source Mask. */
101 0x0000ffff, /* Dest Mask. */
102 TRUE
), /* PC relative offset? */
104 /* The low half of a PCREL 32 bit relocation. */
105 HOWTO (R_MICROBLAZE_32_PCREL_LO
, /* Type. */
107 2, /* Size (0 = byte, 1 = short, 2 = long). */
109 TRUE
, /* PC_relative. */
111 complain_overflow_signed
, /* Complain on overflow. */
112 bfd_elf_generic_reloc
, /* Special Function. */
113 "R_MICROBLAZE_32_PCREL_LO", /* Name. */
114 FALSE
, /* Partial Inplace. */
115 0, /* Source Mask. */
116 0x0000ffff, /* Dest Mask. */
117 TRUE
), /* PC relative offset? */
119 /* A 64 bit relocation. Table entry not really used. */
120 HOWTO (R_MICROBLAZE_64
, /* Type. */
122 2, /* Size (0 = byte, 1 = short, 2 = long). */
124 FALSE
, /* PC_relative. */
126 complain_overflow_dont
, /* Complain on overflow. */
127 bfd_elf_generic_reloc
,/* Special Function. */
128 "R_MICROBLAZE_64", /* Name. */
129 FALSE
, /* Partial Inplace. */
130 0, /* Source Mask. */
131 0x0000ffff, /* Dest Mask. */
132 FALSE
), /* PC relative offset? */
134 /* The low half of a 32 bit relocation. */
135 HOWTO (R_MICROBLAZE_32_LO
, /* Type. */
137 2, /* Size (0 = byte, 1 = short, 2 = long). */
139 FALSE
, /* PC_relative. */
141 complain_overflow_signed
, /* Complain on overflow. */
142 bfd_elf_generic_reloc
,/* Special Function. */
143 "R_MICROBLAZE_32_LO", /* Name. */
144 FALSE
, /* Partial Inplace. */
145 0, /* Source Mask. */
146 0x0000ffff, /* Dest Mask. */
147 FALSE
), /* PC relative offset? */
149 /* Read-only small data section relocation. */
150 HOWTO (R_MICROBLAZE_SRO32
, /* Type. */
152 2, /* Size (0 = byte, 1 = short, 2 = long). */
154 FALSE
, /* PC_relative. */
156 complain_overflow_bitfield
, /* Complain on overflow. */
157 bfd_elf_generic_reloc
,/* Special Function. */
158 "R_MICROBLAZE_SRO32", /* Name. */
159 FALSE
, /* Partial Inplace. */
160 0, /* Source Mask. */
161 0x0000ffff, /* Dest Mask. */
162 FALSE
), /* PC relative offset? */
164 /* Read-write small data area relocation. */
165 HOWTO (R_MICROBLAZE_SRW32
, /* Type. */
167 2, /* Size (0 = byte, 1 = short, 2 = long). */
169 FALSE
, /* PC_relative. */
171 complain_overflow_bitfield
, /* Complain on overflow. */
172 bfd_elf_generic_reloc
,/* Special Function. */
173 "R_MICROBLAZE_SRW32", /* Name. */
174 FALSE
, /* Partial Inplace. */
175 0, /* Source Mask. */
176 0x0000ffff, /* Dest Mask. */
177 FALSE
), /* PC relative offset? */
179 /* This reloc does nothing. Used for relaxation. */
180 HOWTO (R_MICROBLAZE_64_NONE
, /* Type. */
182 3, /* Size (0 = byte, 1 = short, 2 = long). */
184 TRUE
, /* PC_relative. */
186 complain_overflow_dont
, /* Complain on overflow. */
187 NULL
, /* Special Function. */
188 "R_MICROBLAZE_64_NONE",/* Name. */
189 FALSE
, /* Partial Inplace. */
190 0, /* Source Mask. */
192 FALSE
), /* PC relative offset? */
194 /* Symbol Op Symbol relocation. */
195 HOWTO (R_MICROBLAZE_32_SYM_OP_SYM
, /* Type. */
197 2, /* Size (0 = byte, 1 = short, 2 = long). */
199 FALSE
, /* PC_relative. */
201 complain_overflow_bitfield
, /* Complain on overflow. */
202 bfd_elf_generic_reloc
,/* Special Function. */
203 "R_MICROBLAZE_32_SYM_OP_SYM", /* Name. */
204 FALSE
, /* Partial Inplace. */
205 0, /* Source Mask. */
206 0xffffffff, /* Dest Mask. */
207 FALSE
), /* PC relative offset? */
209 /* GNU extension to record C++ vtable hierarchy. */
210 HOWTO (R_MICROBLAZE_GNU_VTINHERIT
, /* Type. */
212 2, /* Size (0 = byte, 1 = short, 2 = long). */
214 FALSE
, /* PC_relative. */
216 complain_overflow_dont
,/* Complain on overflow. */
217 NULL
, /* Special Function. */
218 "R_MICROBLAZE_GNU_VTINHERIT", /* Name. */
219 FALSE
, /* Partial Inplace. */
220 0, /* Source Mask. */
222 FALSE
), /* PC relative offset? */
224 /* GNU extension to record C++ vtable member usage. */
225 HOWTO (R_MICROBLAZE_GNU_VTENTRY
, /* Type. */
227 2, /* Size (0 = byte, 1 = short, 2 = long). */
229 FALSE
, /* PC_relative. */
231 complain_overflow_dont
,/* Complain on overflow. */
232 _bfd_elf_rel_vtable_reloc_fn
, /* Special Function. */
233 "R_MICROBLAZE_GNU_VTENTRY", /* Name. */
234 FALSE
, /* Partial Inplace. */
235 0, /* Source Mask. */
237 FALSE
), /* PC relative offset? */
239 /* A 64 bit GOTPC relocation. Table-entry not really used. */
240 HOWTO (R_MICROBLAZE_GOTPC_64
, /* Type. */
242 2, /* Size (0 = byte, 1 = short, 2 = long). */
244 TRUE
, /* PC_relative. */
246 complain_overflow_dont
, /* Complain on overflow. */
247 bfd_elf_generic_reloc
, /* Special Function. */
248 "R_MICROBLAZE_GOTPC_64", /* Name. */
249 FALSE
, /* Partial Inplace. */
250 0, /* Source Mask. */
251 0x0000ffff, /* Dest Mask. */
252 TRUE
), /* PC relative offset? */
254 /* A 64 bit GOT relocation. Table-entry not really used. */
255 HOWTO (R_MICROBLAZE_GOT_64
, /* Type. */
257 2, /* Size (0 = byte, 1 = short, 2 = long). */
259 FALSE
, /* PC_relative. */
261 complain_overflow_dont
, /* Complain on overflow. */
262 bfd_elf_generic_reloc
,/* Special Function. */
263 "R_MICROBLAZE_GOT_64",/* Name. */
264 FALSE
, /* Partial Inplace. */
265 0, /* Source Mask. */
266 0x0000ffff, /* Dest Mask. */
267 FALSE
), /* PC relative offset? */
269 /* A 64 bit PLT relocation. Table-entry not really used. */
270 HOWTO (R_MICROBLAZE_PLT_64
, /* Type. */
272 2, /* Size (0 = byte, 1 = short, 2 = long). */
274 TRUE
, /* PC_relative. */
276 complain_overflow_dont
, /* Complain on overflow. */
277 bfd_elf_generic_reloc
,/* Special Function. */
278 "R_MICROBLAZE_PLT_64",/* Name. */
279 FALSE
, /* Partial Inplace. */
280 0, /* Source Mask. */
281 0x0000ffff, /* Dest Mask. */
282 TRUE
), /* PC relative offset? */
284 /* Table-entry not really used. */
285 HOWTO (R_MICROBLAZE_REL
, /* Type. */
287 2, /* Size (0 = byte, 1 = short, 2 = long). */
289 TRUE
, /* PC_relative. */
291 complain_overflow_dont
, /* Complain on overflow. */
292 bfd_elf_generic_reloc
,/* Special Function. */
293 "R_MICROBLAZE_REL", /* Name. */
294 FALSE
, /* Partial Inplace. */
295 0, /* Source Mask. */
296 0x0000ffff, /* Dest Mask. */
297 TRUE
), /* PC relative offset? */
299 /* Table-entry not really used. */
300 HOWTO (R_MICROBLAZE_JUMP_SLOT
,/* Type. */
302 2, /* Size (0 = byte, 1 = short, 2 = long). */
304 TRUE
, /* PC_relative. */
306 complain_overflow_dont
, /* Complain on overflow. */
307 bfd_elf_generic_reloc
,/* Special Function. */
308 "R_MICROBLAZE_JUMP_SLOT", /* Name. */
309 FALSE
, /* Partial Inplace. */
310 0, /* Source Mask. */
311 0x0000ffff, /* Dest Mask. */
312 TRUE
), /* PC relative offset? */
314 /* Table-entry not really used. */
315 HOWTO (R_MICROBLAZE_GLOB_DAT
,/* Type. */
317 2, /* Size (0 = byte, 1 = short, 2 = long). */
319 TRUE
, /* PC_relative. */
321 complain_overflow_dont
, /* Complain on overflow. */
322 bfd_elf_generic_reloc
,/* Special Function. */
323 "R_MICROBLAZE_GLOB_DAT", /* Name. */
324 FALSE
, /* Partial Inplace. */
325 0, /* Source Mask. */
326 0x0000ffff, /* Dest Mask. */
327 TRUE
), /* PC relative offset? */
329 /* A 64 bit GOT relative relocation. Table-entry not really used. */
330 HOWTO (R_MICROBLAZE_GOTOFF_64
, /* Type. */
332 2, /* Size (0 = byte, 1 = short, 2 = long). */
334 FALSE
, /* PC_relative. */
336 complain_overflow_dont
, /* Complain on overflow. */
337 bfd_elf_generic_reloc
,/* Special Function. */
338 "R_MICROBLAZE_GOTOFF_64", /* Name. */
339 FALSE
, /* Partial Inplace. */
340 0, /* Source Mask. */
341 0x0000ffff, /* Dest Mask. */
342 FALSE
), /* PC relative offset? */
344 /* A 32 bit GOT relative relocation. Table-entry not really used. */
345 HOWTO (R_MICROBLAZE_GOTOFF_32
, /* Type. */
347 2, /* Size (0 = byte, 1 = short, 2 = long). */
349 FALSE
, /* PC_relative. */
351 complain_overflow_dont
, /* Complain on overflow. */
352 bfd_elf_generic_reloc
, /* Special Function. */
353 "R_MICROBLAZE_GOTOFF_32", /* Name. */
354 FALSE
, /* Partial Inplace. */
355 0, /* Source Mask. */
356 0x0000ffff, /* Dest Mask. */
357 FALSE
), /* PC relative offset? */
359 /* COPY relocation. Table-entry not really used. */
360 HOWTO (R_MICROBLAZE_COPY
, /* Type. */
362 2, /* Size (0 = byte, 1 = short, 2 = long). */
364 FALSE
, /* PC_relative. */
366 complain_overflow_dont
, /* Complain on overflow. */
367 bfd_elf_generic_reloc
,/* Special Function. */
368 "R_MICROBLAZE_COPY", /* Name. */
369 FALSE
, /* Partial Inplace. */
370 0, /* Source Mask. */
371 0x0000ffff, /* Dest Mask. */
372 FALSE
), /* PC relative offset? */
374 /* Marker relocs for TLS. */
375 HOWTO (R_MICROBLAZE_TLS
,
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 FALSE
, /* pc_relative */
381 complain_overflow_dont
, /* complain_on_overflow */
382 bfd_elf_generic_reloc
, /* special_function */
383 "R_MICROBLAZE_TLS", /* name */
384 FALSE
, /* partial_inplace */
386 0x0000ffff, /* dst_mask */
387 FALSE
), /* pcrel_offset */
389 HOWTO (R_MICROBLAZE_TLSGD
,
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_dont
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 "R_MICROBLAZE_TLSGD", /* name */
398 FALSE
, /* partial_inplace */
400 0x0000ffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
403 HOWTO (R_MICROBLAZE_TLSLD
,
405 2, /* size (0 = byte, 1 = short, 2 = long) */
407 FALSE
, /* pc_relative */
409 complain_overflow_dont
, /* complain_on_overflow */
410 bfd_elf_generic_reloc
, /* special_function */
411 "R_MICROBLAZE_TLSLD", /* name */
412 FALSE
, /* partial_inplace */
414 0x0000ffff, /* dst_mask */
415 FALSE
), /* pcrel_offset */
417 /* Computes the load module index of the load module that contains the
418 definition of its TLS sym. */
419 HOWTO (R_MICROBLAZE_TLSDTPMOD32
,
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 FALSE
, /* pc_relative */
425 complain_overflow_dont
, /* complain_on_overflow */
426 bfd_elf_generic_reloc
, /* special_function */
427 "R_MICROBLAZE_TLSDTPMOD32", /* name */
428 FALSE
, /* partial_inplace */
430 0x0000ffff, /* dst_mask */
431 FALSE
), /* pcrel_offset */
433 /* Computes a dtv-relative displacement, the difference between the value
434 of sym+add and the base address of the thread-local storage block that
435 contains the definition of sym, minus 0x8000. Used for initializing GOT */
436 HOWTO (R_MICROBLAZE_TLSDTPREL32
,
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 FALSE
, /* pc_relative */
442 complain_overflow_dont
, /* complain_on_overflow */
443 bfd_elf_generic_reloc
, /* special_function */
444 "R_MICROBLAZE_TLSDTPREL32", /* name */
445 FALSE
, /* partial_inplace */
447 0x0000ffff, /* dst_mask */
448 FALSE
), /* pcrel_offset */
450 /* Computes a dtv-relative displacement, the difference between the value
451 of sym+add and the base address of the thread-local storage block that
452 contains the definition of sym, minus 0x8000. */
453 HOWTO (R_MICROBLAZE_TLSDTPREL64
,
455 2, /* size (0 = byte, 1 = short, 2 = long) */
457 FALSE
, /* pc_relative */
459 complain_overflow_dont
, /* complain_on_overflow */
460 bfd_elf_generic_reloc
, /* special_function */
461 "R_MICROBLAZE_TLSDTPREL64", /* name */
462 FALSE
, /* partial_inplace */
464 0x0000ffff, /* dst_mask */
465 FALSE
), /* pcrel_offset */
467 /* Computes a tp-relative displacement, the difference between the value of
468 sym+add and the value of the thread pointer (r13). */
469 HOWTO (R_MICROBLAZE_TLSGOTTPREL32
,
471 2, /* size (0 = byte, 1 = short, 2 = long) */
473 FALSE
, /* pc_relative */
475 complain_overflow_dont
, /* complain_on_overflow */
476 bfd_elf_generic_reloc
, /* special_function */
477 "R_MICROBLAZE_TLSGOTTPREL32", /* name */
478 FALSE
, /* partial_inplace */
480 0x0000ffff, /* dst_mask */
481 FALSE
), /* pcrel_offset */
483 /* Computes a tp-relative displacement, the difference between the value of
484 sym+add and the value of the thread pointer (r13). */
485 HOWTO (R_MICROBLAZE_TLSTPREL32
,
487 2, /* size (0 = byte, 1 = short, 2 = long) */
489 FALSE
, /* pc_relative */
491 complain_overflow_dont
, /* complain_on_overflow */
492 bfd_elf_generic_reloc
, /* special_function */
493 "R_MICROBLAZE_TLSTPREL32", /* name */
494 FALSE
, /* partial_inplace */
496 0x0000ffff, /* dst_mask */
497 FALSE
), /* pcrel_offset */
502 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
505 /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */
508 microblaze_elf_howto_init (void)
512 for (i
= NUM_ELEM (microblaze_elf_howto_raw
); i
--;)
516 type
= microblaze_elf_howto_raw
[i
].type
;
518 BFD_ASSERT (type
< NUM_ELEM (microblaze_elf_howto_table
));
520 microblaze_elf_howto_table
[type
] = & microblaze_elf_howto_raw
[i
];
524 static reloc_howto_type
*
525 microblaze_elf_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
526 bfd_reloc_code_real_type code
)
528 enum elf_microblaze_reloc_type microblaze_reloc
= R_MICROBLAZE_NONE
;
533 microblaze_reloc
= R_MICROBLAZE_NONE
;
535 case BFD_RELOC_MICROBLAZE_64_NONE
:
536 microblaze_reloc
= R_MICROBLAZE_64_NONE
;
539 microblaze_reloc
= R_MICROBLAZE_32
;
541 /* RVA is treated the same as 32 */
543 microblaze_reloc
= R_MICROBLAZE_32
;
545 case BFD_RELOC_32_PCREL
:
546 microblaze_reloc
= R_MICROBLAZE_32_PCREL
;
548 case BFD_RELOC_64_PCREL
:
549 microblaze_reloc
= R_MICROBLAZE_64_PCREL
;
551 case BFD_RELOC_MICROBLAZE_32_LO_PCREL
:
552 microblaze_reloc
= R_MICROBLAZE_32_PCREL_LO
;
555 microblaze_reloc
= R_MICROBLAZE_64
;
557 case BFD_RELOC_MICROBLAZE_32_LO
:
558 microblaze_reloc
= R_MICROBLAZE_32_LO
;
560 case BFD_RELOC_MICROBLAZE_32_ROSDA
:
561 microblaze_reloc
= R_MICROBLAZE_SRO32
;
563 case BFD_RELOC_MICROBLAZE_32_RWSDA
:
564 microblaze_reloc
= R_MICROBLAZE_SRW32
;
566 case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM
:
567 microblaze_reloc
= R_MICROBLAZE_32_SYM_OP_SYM
;
569 case BFD_RELOC_VTABLE_INHERIT
:
570 microblaze_reloc
= R_MICROBLAZE_GNU_VTINHERIT
;
572 case BFD_RELOC_VTABLE_ENTRY
:
573 microblaze_reloc
= R_MICROBLAZE_GNU_VTENTRY
;
575 case BFD_RELOC_MICROBLAZE_64_GOTPC
:
576 microblaze_reloc
= R_MICROBLAZE_GOTPC_64
;
578 case BFD_RELOC_MICROBLAZE_64_GOT
:
579 microblaze_reloc
= R_MICROBLAZE_GOT_64
;
581 case BFD_RELOC_MICROBLAZE_64_PLT
:
582 microblaze_reloc
= R_MICROBLAZE_PLT_64
;
584 case BFD_RELOC_MICROBLAZE_64_GOTOFF
:
585 microblaze_reloc
= R_MICROBLAZE_GOTOFF_64
;
587 case BFD_RELOC_MICROBLAZE_32_GOTOFF
:
588 microblaze_reloc
= R_MICROBLAZE_GOTOFF_32
;
590 case BFD_RELOC_MICROBLAZE_64_TLSGD
:
591 microblaze_reloc
= R_MICROBLAZE_TLSGD
;
593 case BFD_RELOC_MICROBLAZE_64_TLSLD
:
594 microblaze_reloc
= R_MICROBLAZE_TLSLD
;
596 case BFD_RELOC_MICROBLAZE_32_TLSDTPREL
:
597 microblaze_reloc
= R_MICROBLAZE_TLSDTPREL32
;
599 case BFD_RELOC_MICROBLAZE_64_TLSDTPREL
:
600 microblaze_reloc
= R_MICROBLAZE_TLSDTPREL64
;
602 case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD
:
603 microblaze_reloc
= R_MICROBLAZE_TLSDTPMOD32
;
605 case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL
:
606 microblaze_reloc
= R_MICROBLAZE_TLSGOTTPREL32
;
608 case BFD_RELOC_MICROBLAZE_64_TLSTPREL
:
609 microblaze_reloc
= R_MICROBLAZE_TLSTPREL32
;
611 case BFD_RELOC_MICROBLAZE_COPY
:
612 microblaze_reloc
= R_MICROBLAZE_COPY
;
615 return (reloc_howto_type
*) NULL
;
618 if (!microblaze_elf_howto_table
[R_MICROBLAZE_32
])
619 /* Initialize howto table if needed. */
620 microblaze_elf_howto_init ();
622 return microblaze_elf_howto_table
[(int) microblaze_reloc
];
625 static reloc_howto_type
*
626 microblaze_elf_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
631 for (i
= 0; i
< NUM_ELEM (microblaze_elf_howto_raw
); i
++)
632 if (microblaze_elf_howto_raw
[i
].name
!= NULL
633 && strcasecmp (microblaze_elf_howto_raw
[i
].name
, r_name
) == 0)
634 return µblaze_elf_howto_raw
[i
];
639 /* Set the howto pointer for a RCE ELF reloc. */
642 microblaze_elf_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
,
644 Elf_Internal_Rela
* dst
)
648 if (!microblaze_elf_howto_table
[R_MICROBLAZE_32
])
649 /* Initialize howto table if needed. */
650 microblaze_elf_howto_init ();
652 r_type
= ELF32_R_TYPE (dst
->r_info
);
653 if (r_type
>= R_MICROBLAZE_max
)
655 /* xgettext:c-format */
656 _bfd_error_handler (_("%B: unrecognised MicroBlaze reloc number: %d"),
658 bfd_set_error (bfd_error_bad_value
);
659 r_type
= R_MICROBLAZE_NONE
;
662 cache_ptr
->howto
= microblaze_elf_howto_table
[r_type
];
665 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
668 microblaze_elf_is_local_label_name (bfd
*abfd
, const char *name
)
670 if (name
[0] == 'L' && name
[1] == '.')
673 if (name
[0] == '$' && name
[1] == 'L')
676 /* With gcc, the labels go back to starting with '.', so we accept
677 the generic ELF local label syntax as well. */
678 return _bfd_elf_is_local_label_name (abfd
, name
);
681 /* The microblaze linker (like many others) needs to keep track of
682 the number of relocs that it decides to copy as dynamic relocs in
683 check_relocs for each symbol. This is so that it can later discard
684 them if they are found to be unnecessary. We store the information
685 in a field extending the regular ELF linker hash table. */
687 struct elf32_mb_dyn_relocs
689 struct elf32_mb_dyn_relocs
*next
;
691 /* The input section of the reloc. */
694 /* Total number of relocs copied for the input section. */
697 /* Number of pc-relative relocs copied for the input section. */
698 bfd_size_type pc_count
;
701 /* ELF linker hash entry. */
703 struct elf32_mb_link_hash_entry
705 struct elf_link_hash_entry elf
;
707 /* Track dynamic relocs copied for this symbol. */
708 struct elf32_mb_dyn_relocs
*dyn_relocs
;
710 /* TLS Reference Types for the symbol; Updated by check_relocs */
711 #define TLS_GD 1 /* GD reloc. */
712 #define TLS_LD 2 /* LD reloc. */
713 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
714 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
715 #define TLS_TLS 16 /* Any TLS reloc. */
716 unsigned char tls_mask
;
720 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD))
721 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD))
722 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL))
723 #define IS_TLS_NONE(x) (x == 0)
725 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
727 /* ELF linker hash table. */
729 struct elf32_mb_link_hash_table
731 struct elf_link_hash_table elf
;
733 /* Small local sym to section mapping cache. */
734 struct sym_cache sym_sec
;
736 /* TLS Local Dynamic GOT Entry */
738 bfd_signed_vma refcount
;
743 /* Nonzero if this section has TLS related relocations. */
744 #define has_tls_reloc sec_flg0
746 /* Get the ELF linker hash table from a link_info structure. */
748 #define elf32_mb_hash_table(p) \
749 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
750 == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL)
752 /* Create an entry in a microblaze ELF linker hash table. */
754 static struct bfd_hash_entry
*
755 link_hash_newfunc (struct bfd_hash_entry
*entry
,
756 struct bfd_hash_table
*table
,
759 /* Allocate the structure if it has not already been allocated by a
763 entry
= bfd_hash_allocate (table
,
764 sizeof (struct elf32_mb_link_hash_entry
));
769 /* Call the allocation method of the superclass. */
770 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
773 struct elf32_mb_link_hash_entry
*eh
;
775 eh
= (struct elf32_mb_link_hash_entry
*) entry
;
776 eh
->dyn_relocs
= NULL
;
783 /* Create a mb ELF linker hash table. */
785 static struct bfd_link_hash_table
*
786 microblaze_elf_link_hash_table_create (bfd
*abfd
)
788 struct elf32_mb_link_hash_table
*ret
;
789 bfd_size_type amt
= sizeof (struct elf32_mb_link_hash_table
);
791 ret
= (struct elf32_mb_link_hash_table
*) bfd_zmalloc (amt
);
795 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
796 sizeof (struct elf32_mb_link_hash_entry
),
797 MICROBLAZE_ELF_DATA
))
803 return &ret
->elf
.root
;
806 /* Set the values of the small data pointers. */
809 microblaze_elf_final_sdp (struct bfd_link_info
*info
)
811 struct bfd_link_hash_entry
*h
;
813 h
= bfd_link_hash_lookup (info
->hash
, RO_SDA_ANCHOR_NAME
, FALSE
, FALSE
, TRUE
);
814 if (h
!= (struct bfd_link_hash_entry
*) NULL
815 && h
->type
== bfd_link_hash_defined
)
816 ro_small_data_pointer
= (h
->u
.def
.value
817 + h
->u
.def
.section
->output_section
->vma
818 + h
->u
.def
.section
->output_offset
);
820 h
= bfd_link_hash_lookup (info
->hash
, RW_SDA_ANCHOR_NAME
, FALSE
, FALSE
, TRUE
);
821 if (h
!= (struct bfd_link_hash_entry
*) NULL
822 && h
->type
== bfd_link_hash_defined
)
823 rw_small_data_pointer
= (h
->u
.def
.value
824 + h
->u
.def
.section
->output_section
->vma
825 + h
->u
.def
.section
->output_offset
);
829 dtprel_base (struct bfd_link_info
*info
)
831 /* If tls_sec is NULL, we should have signalled an error already. */
832 if (elf_hash_table (info
)->tls_sec
== NULL
)
834 return elf_hash_table (info
)->tls_sec
->vma
;
837 /* The size of the thread control block. */
840 /* Output a simple dynamic relocation into SRELOC. */
843 microblaze_elf_output_dynamic_relocation (bfd
*output_bfd
,
845 unsigned long reloc_index
,
852 Elf_Internal_Rela rel
;
854 rel
.r_info
= ELF32_R_INFO (indx
, r_type
);
855 rel
.r_offset
= offset
;
856 rel
.r_addend
= addend
;
858 bfd_elf32_swap_reloca_out (output_bfd
, &rel
,
859 (sreloc
->contents
+ reloc_index
* sizeof (Elf32_External_Rela
)));
862 /* This code is taken from elf32-m32r.c
863 There is some attempt to make this function usable for many architectures,
864 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
865 if only to serve as a learning tool.
867 The RELOCATE_SECTION function is called by the new ELF backend linker
868 to handle the relocations for a section.
870 The relocs are always passed as Rela structures; if the section
871 actually uses Rel structures, the r_addend field will always be
874 This function is responsible for adjust the section contents as
875 necessary, and (if using Rela relocs and generating a
876 relocatable output file) adjusting the reloc addend as
879 This function does not have to worry about setting the reloc
880 address or the reloc symbol index.
882 LOCAL_SYMS is a pointer to the swapped in local symbols.
884 LOCAL_SECTIONS is an array giving the section in the input file
885 corresponding to the st_shndx field of each local symbol.
887 The global hash table entry for the global symbols can be found
888 via elf_sym_hashes (input_bfd).
890 When generating relocatable output, this function must handle
891 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
892 going to be the section symbol corresponding to the output
893 section, which means that the addend must be adjusted
897 microblaze_elf_relocate_section (bfd
*output_bfd
,
898 struct bfd_link_info
*info
,
900 asection
*input_section
,
902 Elf_Internal_Rela
*relocs
,
903 Elf_Internal_Sym
*local_syms
,
904 asection
**local_sections
)
906 struct elf32_mb_link_hash_table
*htab
;
907 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
908 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
909 Elf_Internal_Rela
*rel
, *relend
;
910 int endian
= (bfd_little_endian (output_bfd
)) ? 0 : 2;
911 /* Assume success. */
912 bfd_boolean ret
= TRUE
;
914 bfd_vma
*local_got_offsets
;
915 unsigned int tls_type
;
917 if (!microblaze_elf_howto_table
[R_MICROBLAZE_max
-1])
918 microblaze_elf_howto_init ();
920 htab
= elf32_mb_hash_table (info
);
924 local_got_offsets
= elf_local_got_offsets (input_bfd
);
926 sreloc
= elf_section_data (input_section
)->sreloc
;
929 relend
= relocs
+ input_section
->reloc_count
;
930 for (; rel
< relend
; rel
++)
933 reloc_howto_type
*howto
;
934 unsigned long r_symndx
;
935 bfd_vma addend
= rel
->r_addend
;
936 bfd_vma offset
= rel
->r_offset
;
937 struct elf_link_hash_entry
*h
;
938 Elf_Internal_Sym
*sym
;
940 const char *sym_name
;
941 bfd_reloc_status_type r
= bfd_reloc_ok
;
942 const char *errmsg
= NULL
;
943 bfd_boolean unresolved_reloc
= FALSE
;
946 r_type
= ELF32_R_TYPE (rel
->r_info
);
949 if (r_type
< 0 || r_type
>= (int) R_MICROBLAZE_max
)
951 /* xgettext:c-format */
952 _bfd_error_handler (_("%B: unknown relocation type %d"),
953 input_bfd
, (int) r_type
);
954 bfd_set_error (bfd_error_bad_value
);
959 howto
= microblaze_elf_howto_table
[r_type
];
960 r_symndx
= ELF32_R_SYM (rel
->r_info
);
962 if (bfd_link_relocatable (info
))
964 /* This is a relocatable link. We don't have to change
965 anything, unless the reloc is against a section symbol,
966 in which case we have to adjust according to where the
967 section symbol winds up in the output section. */
969 if (r_symndx
>= symtab_hdr
->sh_info
)
970 /* External symbol. */
974 sym
= local_syms
+ r_symndx
;
975 sym_name
= "<local symbol>";
976 /* STT_SECTION: symbol is associated with a section. */
977 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
978 /* Symbol isn't associated with a section. Nothing to do. */
981 sec
= local_sections
[r_symndx
];
982 addend
+= sec
->output_offset
+ sym
->st_value
;
984 /* This can't be done for USE_REL because it doesn't mean anything
985 and elf_link_input_bfd asserts this stays zero. */
986 /* rel->r_addend = addend; */
990 /* Addends are stored with relocs. We're done. */
993 /* If partial_inplace, we need to store any additional addend
994 back in the section. */
995 if (!howto
->partial_inplace
)
997 /* ??? Here is a nice place to call a special_function like handler. */
998 r
= _bfd_relocate_contents (howto
, input_bfd
, addend
,
1000 #endif /* USE_REL */
1005 bfd_boolean resolved_to_zero
;
1007 /* This is a final link. */
1010 unresolved_reloc
= FALSE
;
1012 if (r_symndx
< symtab_hdr
->sh_info
)
1015 sym
= local_syms
+ r_symndx
;
1016 sec
= local_sections
[r_symndx
];
1019 sym_name
= "<local symbol>";
1020 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1021 /* r_addend may have changed if the reference section was
1023 addend
= rel
->r_addend
;
1027 /* External symbol. */
1028 bfd_boolean warned ATTRIBUTE_UNUSED
;
1029 bfd_boolean ignored ATTRIBUTE_UNUSED
;
1031 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1032 r_symndx
, symtab_hdr
, sym_hashes
,
1034 unresolved_reloc
, warned
, ignored
);
1035 sym_name
= h
->root
.root
.string
;
1038 /* Sanity check the address. */
1039 if (offset
> bfd_get_section_limit (input_bfd
, input_section
))
1041 r
= bfd_reloc_outofrange
;
1045 resolved_to_zero
= (h
!= NULL
1046 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
1048 switch ((int) r_type
)
1050 case (int) R_MICROBLAZE_SRO32
:
1054 /* Only relocate if the symbol is defined. */
1057 name
= bfd_get_section_name (sec
->owner
, sec
);
1059 if (strcmp (name
, ".sdata2") == 0
1060 || strcmp (name
, ".sbss2") == 0)
1062 if (ro_small_data_pointer
== 0)
1063 microblaze_elf_final_sdp (info
);
1064 if (ro_small_data_pointer
== 0)
1067 r
= bfd_reloc_undefined
;
1071 /* At this point `relocation' contains the object's
1073 relocation
-= ro_small_data_pointer
;
1074 /* Now it contains the offset from _SDA2_BASE_. */
1075 r
= _bfd_final_link_relocate (howto
, input_bfd
,
1078 relocation
, addend
);
1083 /* xgettext:c-format */
1084 (_("%B: The target (%s) of an %s relocation"
1085 " is in the wrong section (%A)"),
1088 microblaze_elf_howto_table
[(int) r_type
]->name
,
1090 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1098 case (int) R_MICROBLAZE_SRW32
:
1102 /* Only relocate if the symbol is defined. */
1105 name
= bfd_get_section_name (sec
->owner
, sec
);
1107 if (strcmp (name
, ".sdata") == 0
1108 || strcmp (name
, ".sbss") == 0)
1110 if (rw_small_data_pointer
== 0)
1111 microblaze_elf_final_sdp (info
);
1112 if (rw_small_data_pointer
== 0)
1115 r
= bfd_reloc_undefined
;
1119 /* At this point `relocation' contains the object's
1121 relocation
-= rw_small_data_pointer
;
1122 /* Now it contains the offset from _SDA_BASE_. */
1123 r
= _bfd_final_link_relocate (howto
, input_bfd
,
1126 relocation
, addend
);
1131 /* xgettext:c-format */
1132 (_("%B: The target (%s) of an %s relocation"
1133 " is in the wrong section (%A)"),
1136 microblaze_elf_howto_table
[(int) r_type
]->name
,
1138 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1146 case (int) R_MICROBLAZE_32_SYM_OP_SYM
:
1147 break; /* Do nothing. */
1149 case (int) R_MICROBLAZE_GOTPC_64
:
1150 relocation
= (htab
->elf
.sgotplt
->output_section
->vma
1151 + htab
->elf
.sgotplt
->output_offset
);
1152 relocation
-= (input_section
->output_section
->vma
1153 + input_section
->output_offset
1154 + offset
+ INST_WORD_SIZE
);
1155 relocation
+= addend
;
1156 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1157 contents
+ offset
+ endian
);
1158 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1159 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1162 case (int) R_MICROBLAZE_PLT_64
:
1165 if (htab
->elf
.splt
!= NULL
&& h
!= NULL
1166 && h
->plt
.offset
!= (bfd_vma
) -1)
1168 relocation
= (htab
->elf
.splt
->output_section
->vma
1169 + htab
->elf
.splt
->output_offset
1171 unresolved_reloc
= FALSE
;
1172 immediate
= relocation
- (input_section
->output_section
->vma
1173 + input_section
->output_offset
1174 + offset
+ INST_WORD_SIZE
);
1175 bfd_put_16 (input_bfd
, (immediate
>> 16) & 0xffff,
1176 contents
+ offset
+ endian
);
1177 bfd_put_16 (input_bfd
, immediate
& 0xffff,
1178 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1182 relocation
-= (input_section
->output_section
->vma
1183 + input_section
->output_offset
1184 + offset
+ INST_WORD_SIZE
);
1185 immediate
= relocation
;
1186 bfd_put_16 (input_bfd
, (immediate
>> 16) & 0xffff,
1187 contents
+ offset
+ endian
);
1188 bfd_put_16 (input_bfd
, immediate
& 0xffff,
1189 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1194 case (int) R_MICROBLAZE_TLSGD
:
1195 tls_type
= (TLS_TLS
| TLS_GD
);
1197 case (int) R_MICROBLAZE_TLSLD
:
1198 tls_type
= (TLS_TLS
| TLS_LD
);
1201 case (int) R_MICROBLAZE_GOT_64
:
1206 bfd_vma static_value
;
1208 bfd_boolean need_relocs
= FALSE
;
1209 if (htab
->elf
.sgot
== NULL
)
1215 /* 1. Identify GOT Offset;
1216 2. Compute Static Values
1217 3. Process Module Id, Process Offset
1218 4. Fixup Relocation with GOT offset value. */
1220 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1221 if (IS_TLS_LD (tls_type
))
1222 offp
= &htab
->tlsld_got
.offset
;
1225 if (htab
->elf
.sgotplt
!= NULL
1226 && h
->got
.offset
!= (bfd_vma
) -1)
1227 offp
= &h
->got
.offset
;
1233 if (local_got_offsets
== NULL
)
1235 offp
= &local_got_offsets
[r_symndx
];
1244 if (IS_TLS_LD(tls_type
) || IS_TLS_GD(tls_type
))
1247 /* Symbol index to use for relocs */
1251 elf_hash_table (info
)->dynamic_sections_created
;
1253 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1254 bfd_link_pic (info
),
1256 && (!bfd_link_pic (info
)
1257 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
1261 /* Need to generate relocs ? */
1262 if ((bfd_link_pic (info
) || indx
!= 0)
1264 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1265 && !resolved_to_zero
)
1266 || h
->root
.type
!= bfd_link_hash_undefweak
))
1269 /* 2. Compute/Emit Static value of r-expression */
1270 static_value
= relocation
+ addend
;
1272 /* 3. Process module-id and offset */
1273 if (! ((*offp
) & 1) )
1277 got_offset
= (htab
->elf
.sgot
->output_section
->vma
1278 + htab
->elf
.sgot
->output_offset
1281 /* Process module-id */
1282 if (IS_TLS_LD(tls_type
))
1284 if (! bfd_link_pic (info
))
1285 bfd_put_32 (output_bfd
, 1,
1286 htab
->elf
.sgot
->contents
+ off
);
1288 microblaze_elf_output_dynamic_relocation
1291 htab
->elf
.srelgot
->reloc_count
++,
1292 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32
,
1295 else if (IS_TLS_GD(tls_type
))
1298 bfd_put_32 (output_bfd
, 1,
1299 htab
->elf
.sgot
->contents
+ off
);
1301 microblaze_elf_output_dynamic_relocation
1304 htab
->elf
.srelgot
->reloc_count
++,
1305 /* symindex= */ indx
, R_MICROBLAZE_TLSDTPMOD32
,
1306 got_offset
, indx
? 0 : static_value
);
1309 /* Process Offset */
1310 if (htab
->elf
.srelgot
== NULL
)
1313 got_offset
= (htab
->elf
.sgot
->output_section
->vma
1314 + htab
->elf
.sgot
->output_offset
1316 if (IS_TLS_LD(tls_type
))
1318 /* For LD, offset should be 0 */
1320 bfd_put_32 (output_bfd
, 0,
1321 htab
->elf
.sgot
->contents
+ off2
);
1323 else if (IS_TLS_GD(tls_type
))
1326 static_value
-= dtprel_base(info
);
1328 microblaze_elf_output_dynamic_relocation
1331 htab
->elf
.srelgot
->reloc_count
++,
1332 /* symindex= */ indx
, R_MICROBLAZE_TLSDTPREL32
,
1333 got_offset
, indx
? 0 : static_value
);
1335 bfd_put_32 (output_bfd
, static_value
,
1336 htab
->elf
.sgot
->contents
+ off2
);
1340 bfd_put_32 (output_bfd
, static_value
,
1341 htab
->elf
.sgot
->contents
+ off2
);
1343 /* Relocs for dyn symbols generated by
1344 finish_dynamic_symbols */
1345 if (bfd_link_pic (info
) && h
== NULL
)
1348 microblaze_elf_output_dynamic_relocation
1351 htab
->elf
.srelgot
->reloc_count
++,
1352 /* symindex= */ indx
, R_MICROBLAZE_REL
,
1353 got_offset
, static_value
);
1358 /* 4. Fixup Relocation with GOT offset value
1359 Compute relative address of GOT entry for applying
1360 the current relocation */
1361 relocation
= htab
->elf
.sgot
->output_section
->vma
1362 + htab
->elf
.sgot
->output_offset
1364 - htab
->elf
.sgotplt
->output_section
->vma
1365 - htab
->elf
.sgotplt
->output_offset
;
1367 /* Apply Current Relocation */
1368 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1369 contents
+ offset
+ endian
);
1370 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1371 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1373 unresolved_reloc
= FALSE
;
1377 case (int) R_MICROBLAZE_GOTOFF_64
:
1380 unsigned short lo
, high
;
1381 relocation
+= addend
;
1382 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
1383 + htab
->elf
.sgotplt
->output_offset
);
1384 /* Write this value into correct location. */
1385 immediate
= relocation
;
1386 lo
= immediate
& 0x0000ffff;
1387 high
= (immediate
>> 16) & 0x0000ffff;
1388 bfd_put_16 (input_bfd
, high
, contents
+ offset
+ endian
);
1389 bfd_put_16 (input_bfd
, lo
,
1390 contents
+ offset
+ INST_WORD_SIZE
+ endian
);
1394 case (int) R_MICROBLAZE_GOTOFF_32
:
1396 relocation
+= addend
;
1397 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
1398 + htab
->elf
.sgotplt
->output_offset
);
1399 /* Write this value into correct location. */
1400 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1404 case (int) R_MICROBLAZE_TLSDTPREL64
:
1405 relocation
+= addend
;
1406 relocation
-= dtprel_base(info
);
1407 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1408 contents
+ offset
+ 2);
1409 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1410 contents
+ offset
+ 2 + INST_WORD_SIZE
);
1412 case (int) R_MICROBLAZE_64_PCREL
:
1413 case (int) R_MICROBLAZE_64
:
1414 case (int) R_MICROBLAZE_32
:
1416 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1417 from removed linkonce sections, or sections discarded by
1419 if (r_symndx
== STN_UNDEF
|| (input_section
->flags
& SEC_ALLOC
) == 0)
1421 relocation
+= addend
;
1422 if (r_type
== R_MICROBLAZE_32
)
1423 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1426 if (r_type
== R_MICROBLAZE_64_PCREL
)
1427 relocation
-= (input_section
->output_section
->vma
1428 + input_section
->output_offset
1429 + offset
+ INST_WORD_SIZE
);
1430 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1431 contents
+ offset
+ endian
);
1432 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1433 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1438 if ((bfd_link_pic (info
)
1440 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1441 && !resolved_to_zero
)
1442 || h
->root
.type
!= bfd_link_hash_undefweak
)
1443 && (!howto
->pc_relative
1447 || !h
->def_regular
))))
1448 || (!bfd_link_pic (info
)
1454 || h
->root
.type
== bfd_link_hash_undefweak
1455 || h
->root
.type
== bfd_link_hash_undefined
)))
1457 Elf_Internal_Rela outrel
;
1461 /* When generating a shared object, these relocations
1462 are copied into the output file to be resolved at run
1465 BFD_ASSERT (sreloc
!= NULL
);
1470 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1472 if (outrel
.r_offset
== (bfd_vma
) -1)
1474 else if (outrel
.r_offset
== (bfd_vma
) -2)
1476 outrel
.r_offset
+= (input_section
->output_section
->vma
1477 + input_section
->output_offset
);
1480 memset (&outrel
, 0, sizeof outrel
);
1481 /* h->dynindx may be -1 if the symbol was marked to
1484 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1485 || !h
->def_regular
))
1487 BFD_ASSERT (h
->dynindx
!= -1);
1488 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
1489 outrel
.r_addend
= addend
;
1493 if (r_type
== R_MICROBLAZE_32
)
1495 outrel
.r_info
= ELF32_R_INFO (0, R_MICROBLAZE_REL
);
1496 outrel
.r_addend
= relocation
+ addend
;
1502 (_("%B: probably compiled without -fPIC?"),
1504 bfd_set_error (bfd_error_bad_value
);
1509 loc
= sreloc
->contents
;
1510 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1511 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1516 relocation
+= addend
;
1517 if (r_type
== R_MICROBLAZE_32
)
1518 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1521 if (r_type
== R_MICROBLAZE_64_PCREL
)
1522 relocation
-= (input_section
->output_section
->vma
1523 + input_section
->output_offset
1524 + offset
+ INST_WORD_SIZE
);
1525 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1526 contents
+ offset
+ endian
);
1527 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1528 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1535 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1537 relocation
, addend
);
1544 if (r
!= bfd_reloc_ok
)
1546 /* FIXME: This should be generic enough to go in a utility. */
1550 name
= h
->root
.root
.string
;
1553 name
= (bfd_elf_string_from_elf_section
1554 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
1555 if (name
== NULL
|| *name
== '\0')
1556 name
= bfd_section_name (input_bfd
, sec
);
1564 case bfd_reloc_overflow
:
1565 (*info
->callbacks
->reloc_overflow
)
1566 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1567 (bfd_vma
) 0, input_bfd
, input_section
, offset
);
1570 case bfd_reloc_undefined
:
1571 (*info
->callbacks
->undefined_symbol
)
1572 (info
, name
, input_bfd
, input_section
, offset
, TRUE
);
1575 case bfd_reloc_outofrange
:
1576 errmsg
= _("internal error: out of range error");
1579 case bfd_reloc_notsupported
:
1580 errmsg
= _("internal error: unsupported relocation error");
1583 case bfd_reloc_dangerous
:
1584 errmsg
= _("internal error: dangerous error");
1588 errmsg
= _("internal error: unknown error");
1591 (*info
->callbacks
->warning
) (info
, errmsg
, name
, input_bfd
,
1592 input_section
, offset
);
1601 /* Calculate fixup value for reference. */
1604 calc_fixup (bfd_vma start
, bfd_vma size
, asection
*sec
)
1606 bfd_vma end
= start
+ size
;
1609 if (sec
== NULL
|| sec
->relax
== NULL
)
1612 /* Look for addr in relax table, total fixup value. */
1613 for (i
= 0; i
< sec
->relax_count
; i
++)
1615 if (end
<= sec
->relax
[i
].addr
)
1617 if ((end
!= start
) && (start
> sec
->relax
[i
].addr
))
1619 fixup
+= sec
->relax
[i
].size
;
1624 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1625 a 32-bit instruction. */
1627 microblaze_bfd_write_imm_value_32 (bfd
*abfd
, bfd_byte
*bfd_addr
, bfd_vma val
)
1629 unsigned long instr
= bfd_get_32 (abfd
, bfd_addr
);
1630 instr
&= ~0x0000ffff;
1631 instr
|= (val
& 0x0000ffff);
1632 bfd_put_32 (abfd
, instr
, bfd_addr
);
1635 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1636 two consecutive 32-bit instructions. */
1638 microblaze_bfd_write_imm_value_64 (bfd
*abfd
, bfd_byte
*bfd_addr
, bfd_vma val
)
1640 unsigned long instr_hi
;
1641 unsigned long instr_lo
;
1643 instr_hi
= bfd_get_32 (abfd
, bfd_addr
);
1644 instr_hi
&= ~0x0000ffff;
1645 instr_hi
|= ((val
>> 16) & 0x0000ffff);
1646 bfd_put_32 (abfd
, instr_hi
, bfd_addr
);
1648 instr_lo
= bfd_get_32 (abfd
, bfd_addr
+ INST_WORD_SIZE
);
1649 instr_lo
&= ~0x0000ffff;
1650 instr_lo
|= (val
& 0x0000ffff);
1651 bfd_put_32 (abfd
, instr_lo
, bfd_addr
+ INST_WORD_SIZE
);
1655 microblaze_elf_relax_section (bfd
*abfd
,
1657 struct bfd_link_info
*link_info
,
1660 Elf_Internal_Shdr
*symtab_hdr
;
1661 Elf_Internal_Rela
*internal_relocs
;
1662 Elf_Internal_Rela
*free_relocs
= NULL
;
1663 Elf_Internal_Rela
*irel
, *irelend
;
1664 bfd_byte
*contents
= NULL
;
1665 bfd_byte
*free_contents
= NULL
;
1670 struct elf_link_hash_entry
*sym_hash
;
1671 Elf_Internal_Sym
*isymbuf
, *isymend
;
1672 Elf_Internal_Sym
*isym
;
1677 /* We only do this once per section. We may be able to delete some code
1678 by running multiple passes, but it is not worth it. */
1681 /* Only do this for a text section. */
1682 if (bfd_link_relocatable (link_info
)
1683 || (sec
->flags
& SEC_RELOC
) == 0
1684 || (sec
->reloc_count
== 0)
1685 || (sec
->flags
& SEC_CODE
) == 0)
1688 BFD_ASSERT ((sec
->size
> 0) || (sec
->rawsize
> 0));
1690 /* If this is the first time we have been called for this section,
1691 initialize the cooked size. */
1693 sec
->size
= sec
->rawsize
;
1695 /* Get symbols for this section. */
1696 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1697 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1698 symcount
= symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
1699 if (isymbuf
== NULL
)
1700 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
, symcount
,
1701 0, NULL
, NULL
, NULL
);
1702 BFD_ASSERT (isymbuf
!= NULL
);
1704 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, link_info
->keep_memory
);
1705 if (internal_relocs
== NULL
)
1707 if (! link_info
->keep_memory
)
1708 free_relocs
= internal_relocs
;
1710 sec
->relax
= (struct relax_table
*) bfd_malloc ((sec
->reloc_count
+ 1)
1711 * sizeof (struct relax_table
));
1712 if (sec
->relax
== NULL
)
1714 sec
->relax_count
= 0;
1716 irelend
= internal_relocs
+ sec
->reloc_count
;
1718 for (irel
= internal_relocs
; irel
< irelend
; irel
++, rel_count
++)
1721 if ((ELF32_R_TYPE (irel
->r_info
) != (int) R_MICROBLAZE_64_PCREL
)
1722 && (ELF32_R_TYPE (irel
->r_info
) != (int) R_MICROBLAZE_64
))
1723 continue; /* Can't delete this reloc. */
1725 /* Get the section contents. */
1726 if (contents
== NULL
)
1728 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1729 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1732 contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
1733 if (contents
== NULL
)
1735 free_contents
= contents
;
1737 if (!bfd_get_section_contents (abfd
, sec
, contents
,
1738 (file_ptr
) 0, sec
->size
))
1740 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1744 /* Get the value of the symbol referred to by the reloc. */
1745 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
1747 /* A local symbol. */
1750 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
1751 if (isym
->st_shndx
== SHN_UNDEF
)
1752 sym_sec
= bfd_und_section_ptr
;
1753 else if (isym
->st_shndx
== SHN_ABS
)
1754 sym_sec
= bfd_abs_section_ptr
;
1755 else if (isym
->st_shndx
== SHN_COMMON
)
1756 sym_sec
= bfd_com_section_ptr
;
1758 sym_sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1760 symval
= _bfd_elf_rela_local_sym (abfd
, isym
, &sym_sec
, irel
);
1765 struct elf_link_hash_entry
*h
;
1767 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
1768 h
= elf_sym_hashes (abfd
)[indx
];
1769 BFD_ASSERT (h
!= NULL
);
1771 if (h
->root
.type
!= bfd_link_hash_defined
1772 && h
->root
.type
!= bfd_link_hash_defweak
)
1773 /* This appears to be a reference to an undefined
1774 symbol. Just ignore it--it will be caught by the
1775 regular reloc processing. */
1778 symval
= (h
->root
.u
.def
.value
1779 + h
->root
.u
.def
.section
->output_section
->vma
1780 + h
->root
.u
.def
.section
->output_offset
);
1783 /* If this is a PC-relative reloc, subtract the instr offset from
1784 the symbol value. */
1785 if (ELF32_R_TYPE (irel
->r_info
) == (int) R_MICROBLAZE_64_PCREL
)
1787 symval
= symval
+ irel
->r_addend
1789 + sec
->output_section
->vma
1790 + sec
->output_offset
);
1793 symval
+= irel
->r_addend
;
1795 if ((symval
& 0xffff8000) == 0
1796 || (symval
& 0xffff8000) == 0xffff8000)
1798 /* We can delete this instruction. */
1799 sec
->relax
[sec
->relax_count
].addr
= irel
->r_offset
;
1800 sec
->relax
[sec
->relax_count
].size
= INST_WORD_SIZE
;
1803 /* Rewrite relocation type. */
1804 switch ((enum elf_microblaze_reloc_type
) ELF32_R_TYPE (irel
->r_info
))
1806 case R_MICROBLAZE_64_PCREL
:
1807 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1808 (int) R_MICROBLAZE_32_PCREL_LO
);
1810 case R_MICROBLAZE_64
:
1811 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1812 (int) R_MICROBLAZE_32_LO
);
1815 /* Cannot happen. */
1819 } /* Loop through all relocations. */
1821 /* Loop through the relocs again, and see if anything needs to change. */
1822 if (sec
->relax_count
> 0)
1824 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
1826 sec
->relax
[sec
->relax_count
].addr
= sec
->size
;
1828 for (irel
= internal_relocs
; irel
< irelend
; irel
++, rel_count
++)
1832 /* Get the new reloc address. */
1833 nraddr
= irel
->r_offset
- calc_fixup (irel
->r_offset
, 0, sec
);
1834 switch ((enum elf_microblaze_reloc_type
) ELF32_R_TYPE (irel
->r_info
))
1838 case R_MICROBLAZE_64_PCREL
:
1840 case R_MICROBLAZE_64
:
1841 case R_MICROBLAZE_32_LO
:
1842 /* If this reloc is against a symbol defined in this
1843 section, we must check the addend to see it will put the value in
1844 range to be adjusted, and hence must be changed. */
1845 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
1847 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
1848 /* Only handle relocs against .text. */
1849 if (isym
->st_shndx
== shndx
1850 && ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
)
1851 irel
->r_addend
-= calc_fixup (irel
->r_addend
, 0, sec
);
1854 case R_MICROBLAZE_NONE
:
1856 /* This was a PC-relative instruction that was
1857 completely resolved. */
1859 bfd_vma target_address
;
1860 target_address
= irel
->r_addend
+ irel
->r_offset
;
1861 sfix
= calc_fixup (irel
->r_offset
, 0, sec
);
1862 efix
= calc_fixup (target_address
, 0, sec
);
1863 irel
->r_addend
-= (efix
- sfix
);
1864 /* Should use HOWTO. */
1865 microblaze_bfd_write_imm_value_32 (abfd
, contents
+ irel
->r_offset
,
1869 case R_MICROBLAZE_64_NONE
:
1871 /* This was a PC-relative 64-bit instruction that was
1872 completely resolved. */
1874 bfd_vma target_address
;
1875 target_address
= irel
->r_addend
+ irel
->r_offset
+ INST_WORD_SIZE
;
1876 sfix
= calc_fixup (irel
->r_offset
+ INST_WORD_SIZE
, 0, sec
);
1877 efix
= calc_fixup (target_address
, 0, sec
);
1878 irel
->r_addend
-= (efix
- sfix
);
1879 microblaze_bfd_write_imm_value_32 (abfd
, contents
+ irel
->r_offset
1880 + INST_WORD_SIZE
, irel
->r_addend
);
1884 irel
->r_offset
= nraddr
;
1885 } /* Change all relocs in this section. */
1887 /* Look through all other sections. */
1888 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1890 Elf_Internal_Rela
*irelocs
;
1891 Elf_Internal_Rela
*irelscan
, *irelscanend
;
1892 bfd_byte
*ocontents
;
1895 || (o
->flags
& SEC_RELOC
) == 0
1896 || o
->reloc_count
== 0)
1899 /* We always cache the relocs. Perhaps, if info->keep_memory is
1900 FALSE, we should free them, if we are permitted to. */
1902 irelocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
, TRUE
);
1903 if (irelocs
== NULL
)
1907 irelscanend
= irelocs
+ o
->reloc_count
;
1908 for (irelscan
= irelocs
; irelscan
< irelscanend
; irelscan
++)
1910 if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32
)
1912 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1914 /* Look at the reloc only if the value has been resolved. */
1915 if (isym
->st_shndx
== shndx
1916 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
1918 if (ocontents
== NULL
)
1920 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1921 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1924 /* We always cache the section contents.
1925 Perhaps, if info->keep_memory is FALSE, we
1926 should free them, if we are permitted to. */
1927 if (o
->rawsize
== 0)
1928 o
->rawsize
= o
->size
;
1929 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1930 if (ocontents
== NULL
)
1932 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1936 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1940 irelscan
->r_addend
-= calc_fixup (irelscan
->r_addend
, 0, sec
);
1942 else if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_SYM_OP_SYM
)
1944 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1946 /* Look at the reloc only if the value has been resolved. */
1947 if (ocontents
== NULL
)
1949 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1950 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1953 /* We always cache the section contents.
1954 Perhaps, if info->keep_memory is FALSE, we
1955 should free them, if we are permitted to. */
1957 if (o
->rawsize
== 0)
1958 o
->rawsize
= o
->size
;
1959 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1960 if (ocontents
== NULL
)
1962 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1966 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1969 irelscan
->r_addend
-= calc_fixup (irel
->r_addend
1975 else if ((ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_PCREL_LO
)
1976 || (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_LO
))
1978 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1980 /* Look at the reloc only if the value has been resolved. */
1981 if (isym
->st_shndx
== shndx
1982 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
1985 bfd_vma target_address
;
1987 if (ocontents
== NULL
)
1989 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1990 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1993 /* We always cache the section contents.
1994 Perhaps, if info->keep_memory is FALSE, we
1995 should free them, if we are permitted to. */
1996 if (o
->rawsize
== 0)
1997 o
->rawsize
= o
->size
;
1998 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1999 if (ocontents
== NULL
)
2001 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2005 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2009 unsigned long instr
= bfd_get_32 (abfd
, ocontents
+ irelscan
->r_offset
);
2010 immediate
= instr
& 0x0000ffff;
2011 target_address
= immediate
;
2012 offset
= calc_fixup (target_address
, 0, sec
);
2013 immediate
-= offset
;
2014 irelscan
->r_addend
-= offset
;
2015 microblaze_bfd_write_imm_value_32 (abfd
, ocontents
+ irelscan
->r_offset
,
2016 irelscan
->r_addend
);
2020 if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_64
)
2022 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
2024 /* Look at the reloc only if the value has been resolved. */
2025 if (isym
->st_shndx
== shndx
2026 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
2030 if (ocontents
== NULL
)
2032 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
2033 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
2036 /* We always cache the section contents.
2037 Perhaps, if info->keep_memory is FALSE, we
2038 should free them, if we are permitted to. */
2040 if (o
->rawsize
== 0)
2041 o
->rawsize
= o
->size
;
2042 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
2043 if (ocontents
== NULL
)
2045 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2049 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2052 unsigned long instr_hi
= bfd_get_32 (abfd
, ocontents
2053 + irelscan
->r_offset
);
2054 unsigned long instr_lo
= bfd_get_32 (abfd
, ocontents
2055 + irelscan
->r_offset
2057 immediate
= (instr_hi
& 0x0000ffff) << 16;
2058 immediate
|= (instr_lo
& 0x0000ffff);
2059 offset
= calc_fixup (irelscan
->r_addend
, 0, sec
);
2060 immediate
-= offset
;
2061 irelscan
->r_addend
-= offset
;
2064 else if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_64_PCREL
)
2066 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
2068 /* Look at the reloc only if the value has been resolved. */
2069 if (isym
->st_shndx
== shndx
2070 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
2073 bfd_vma target_address
;
2075 if (ocontents
== NULL
)
2077 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
2078 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
2081 /* We always cache the section contents.
2082 Perhaps, if info->keep_memory is FALSE, we
2083 should free them, if we are permitted to. */
2084 if (o
->rawsize
== 0)
2085 o
->rawsize
= o
->size
;
2086 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
2087 if (ocontents
== NULL
)
2089 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2093 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2096 unsigned long instr_hi
= bfd_get_32 (abfd
, ocontents
2097 + irelscan
->r_offset
);
2098 unsigned long instr_lo
= bfd_get_32 (abfd
, ocontents
2099 + irelscan
->r_offset
2101 immediate
= (instr_hi
& 0x0000ffff) << 16;
2102 immediate
|= (instr_lo
& 0x0000ffff);
2103 target_address
= immediate
;
2104 offset
= calc_fixup (target_address
, 0, sec
);
2105 immediate
-= offset
;
2106 irelscan
->r_addend
-= offset
;
2107 microblaze_bfd_write_imm_value_64 (abfd
, ocontents
2108 + irelscan
->r_offset
, immediate
);
2114 /* Adjust the local symbols defined in this section. */
2115 isymend
= isymbuf
+ symtab_hdr
->sh_info
;
2116 for (isym
= isymbuf
; isym
< isymend
; isym
++)
2118 if (isym
->st_shndx
== shndx
)
2120 isym
->st_value
-= calc_fixup (isym
->st_value
, 0, sec
);
2122 isym
->st_size
-= calc_fixup (isym
->st_value
, isym
->st_size
, sec
);
2126 /* Now adjust the global symbols defined in this section. */
2127 isym
= isymbuf
+ symtab_hdr
->sh_info
;
2128 symcount
= (symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
)) - symtab_hdr
->sh_info
;
2129 for (sym_index
= 0; sym_index
< symcount
; sym_index
++)
2131 sym_hash
= elf_sym_hashes (abfd
)[sym_index
];
2132 if ((sym_hash
->root
.type
== bfd_link_hash_defined
2133 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
2134 && sym_hash
->root
.u
.def
.section
== sec
)
2136 sym_hash
->root
.u
.def
.value
-= calc_fixup (sym_hash
->root
.u
.def
.value
,
2139 sym_hash
->size
-= calc_fixup (sym_hash
->root
.u
.def
.value
,
2140 sym_hash
->size
, sec
);
2144 /* Physically move the code and change the cooked size. */
2145 dest
= sec
->relax
[0].addr
;
2146 for (i
= 0; i
< sec
->relax_count
; i
++)
2149 src
= sec
->relax
[i
].addr
+ sec
->relax
[i
].size
;
2150 len
= sec
->relax
[i
+1].addr
- sec
->relax
[i
].addr
- sec
->relax
[i
].size
;
2152 memmove (contents
+ dest
, contents
+ src
, len
);
2153 sec
->size
-= sec
->relax
[i
].size
;
2157 elf_section_data (sec
)->relocs
= internal_relocs
;
2160 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2161 free_contents
= NULL
;
2163 symtab_hdr
->contents
= (bfd_byte
*) isymbuf
;
2166 if (free_relocs
!= NULL
)
2172 if (free_contents
!= NULL
)
2174 if (!link_info
->keep_memory
)
2175 free (free_contents
);
2177 /* Cache the section contents for elf_link_input_bfd. */
2178 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2179 free_contents
= NULL
;
2182 if (sec
->relax_count
== 0)
2193 if (free_relocs
!= NULL
)
2195 if (free_contents
!= NULL
)
2196 free (free_contents
);
2197 if (sec
->relax
!= NULL
)
2201 sec
->relax_count
= 0;
2206 /* Return the section that should be marked against GC for a given
2210 microblaze_elf_gc_mark_hook (asection
*sec
,
2211 struct bfd_link_info
* info
,
2212 Elf_Internal_Rela
* rel
,
2213 struct elf_link_hash_entry
* h
,
2214 Elf_Internal_Sym
* sym
)
2217 switch (ELF32_R_TYPE (rel
->r_info
))
2219 case R_MICROBLAZE_GNU_VTINHERIT
:
2220 case R_MICROBLAZE_GNU_VTENTRY
:
2224 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2227 /* Update the got entry reference counts for the section being removed. */
2230 microblaze_elf_gc_sweep_hook (bfd
* abfd ATTRIBUTE_UNUSED
,
2231 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
2232 asection
* sec ATTRIBUTE_UNUSED
,
2233 const Elf_Internal_Rela
* relocs ATTRIBUTE_UNUSED
)
2240 #define PLT_ENTRY_SIZE 16
2242 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2243 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2244 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2245 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2246 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2249 update_local_sym_info (bfd
*abfd
,
2250 Elf_Internal_Shdr
*symtab_hdr
,
2251 unsigned long r_symndx
,
2252 unsigned int tls_type
)
2254 bfd_signed_vma
*local_got_refcounts
= elf_local_got_refcounts (abfd
);
2255 unsigned char *local_got_tls_masks
;
2257 if (local_got_refcounts
== NULL
)
2259 bfd_size_type size
= symtab_hdr
->sh_info
;
2261 size
*= (sizeof (*local_got_refcounts
) + sizeof (*local_got_tls_masks
));
2262 local_got_refcounts
= bfd_zalloc (abfd
, size
);
2263 if (local_got_refcounts
== NULL
)
2265 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2268 local_got_tls_masks
=
2269 (unsigned char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2270 local_got_tls_masks
[r_symndx
] |= tls_type
;
2271 local_got_refcounts
[r_symndx
] += 1;
2275 /* Look through the relocs for a section during the first phase. */
2278 microblaze_elf_check_relocs (bfd
* abfd
,
2279 struct bfd_link_info
* info
,
2281 const Elf_Internal_Rela
* relocs
)
2283 Elf_Internal_Shdr
* symtab_hdr
;
2284 struct elf_link_hash_entry
** sym_hashes
;
2285 struct elf_link_hash_entry
** sym_hashes_end
;
2286 const Elf_Internal_Rela
* rel
;
2287 const Elf_Internal_Rela
* rel_end
;
2288 struct elf32_mb_link_hash_table
*htab
;
2289 asection
*sreloc
= NULL
;
2291 if (bfd_link_relocatable (info
))
2294 htab
= elf32_mb_hash_table (info
);
2298 symtab_hdr
= & elf_tdata (abfd
)->symtab_hdr
;
2299 sym_hashes
= elf_sym_hashes (abfd
);
2300 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
2301 if (!elf_bad_symtab (abfd
))
2302 sym_hashes_end
-= symtab_hdr
->sh_info
;
2304 rel_end
= relocs
+ sec
->reloc_count
;
2306 for (rel
= relocs
; rel
< rel_end
; rel
++)
2308 unsigned int r_type
;
2309 struct elf_link_hash_entry
* h
;
2310 unsigned long r_symndx
;
2311 unsigned char tls_type
= 0;
2313 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2314 r_type
= ELF32_R_TYPE (rel
->r_info
);
2316 if (r_symndx
< symtab_hdr
->sh_info
)
2320 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2322 /* PR15323, ref flags aren't set for references in the same
2324 h
->root
.non_ir_ref_regular
= 1;
2329 /* This relocation describes the C++ object vtable hierarchy.
2330 Reconstruct it for later use during GC. */
2331 case R_MICROBLAZE_GNU_VTINHERIT
:
2332 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2336 /* This relocation describes which C++ vtable entries are actually
2337 used. Record for later use during GC. */
2338 case R_MICROBLAZE_GNU_VTENTRY
:
2339 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2343 /* This relocation requires .plt entry. */
2344 case R_MICROBLAZE_PLT_64
:
2348 h
->plt
.refcount
+= 1;
2352 /* This relocation requires .got entry. */
2353 case R_MICROBLAZE_TLSGD
:
2354 tls_type
|= (TLS_TLS
| TLS_GD
);
2356 case R_MICROBLAZE_TLSLD
:
2357 tls_type
|= (TLS_TLS
| TLS_LD
);
2360 sec
->has_tls_reloc
= 1;
2362 case R_MICROBLAZE_GOT_64
:
2363 if (htab
->elf
.sgot
== NULL
)
2365 if (htab
->elf
.dynobj
== NULL
)
2366 htab
->elf
.dynobj
= abfd
;
2367 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
2372 h
->got
.refcount
+= 1;
2373 elf32_mb_hash_entry (h
)->tls_mask
|= tls_type
;
2377 if (! update_local_sym_info(abfd
, symtab_hdr
, r_symndx
, tls_type
) )
2382 case R_MICROBLAZE_GOTOFF_64
:
2383 case R_MICROBLAZE_GOTOFF_32
:
2384 if (htab
->elf
.sgot
== NULL
)
2386 if (htab
->elf
.dynobj
== NULL
)
2387 htab
->elf
.dynobj
= abfd
;
2388 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
2393 case R_MICROBLAZE_64
:
2394 case R_MICROBLAZE_64_PCREL
:
2395 case R_MICROBLAZE_32
:
2397 if (h
!= NULL
&& !bfd_link_pic (info
))
2399 /* we may need a copy reloc. */
2402 /* we may also need a .plt entry. */
2403 h
->plt
.refcount
+= 1;
2404 if (ELF32_R_TYPE (rel
->r_info
) != R_MICROBLAZE_64_PCREL
)
2405 h
->pointer_equality_needed
= 1;
2409 /* If we are creating a shared library, and this is a reloc
2410 against a global symbol, or a non PC relative reloc
2411 against a local symbol, then we need to copy the reloc
2412 into the shared library. However, if we are linking with
2413 -Bsymbolic, we do not need to copy a reloc against a
2414 global symbol which is defined in an object we are
2415 including in the link (i.e., DEF_REGULAR is set). At
2416 this point we have not seen all the input files, so it is
2417 possible that DEF_REGULAR is not set now but will be set
2418 later (it is never cleared). In case of a weak definition,
2419 DEF_REGULAR may be cleared later by a strong definition in
2420 a shared library. We account for that possibility below by
2421 storing information in the relocs_copied field of the hash
2422 table entry. A similar situation occurs when creating
2423 shared libraries and symbol visibility changes render the
2426 If on the other hand, we are creating an executable, we
2427 may need to keep relocations for symbols satisfied by a
2428 dynamic library if we manage to avoid copy relocs for the
2431 if ((bfd_link_pic (info
)
2432 && (sec
->flags
& SEC_ALLOC
) != 0
2433 && (r_type
!= R_MICROBLAZE_64_PCREL
2435 && (! info
->symbolic
2436 || h
->root
.type
== bfd_link_hash_defweak
2437 || !h
->def_regular
))))
2438 || (!bfd_link_pic (info
)
2439 && (sec
->flags
& SEC_ALLOC
) != 0
2441 && (h
->root
.type
== bfd_link_hash_defweak
2442 || !h
->def_regular
)))
2444 struct elf32_mb_dyn_relocs
*p
;
2445 struct elf32_mb_dyn_relocs
**head
;
2447 /* When creating a shared object, we must copy these
2448 relocs into the output file. We create a reloc
2449 section in dynobj and make room for the reloc. */
2455 if (htab
->elf
.dynobj
== NULL
)
2456 htab
->elf
.dynobj
= abfd
;
2457 dynobj
= htab
->elf
.dynobj
;
2459 sreloc
= _bfd_elf_make_dynamic_reloc_section (sec
, dynobj
,
2465 /* If this is a global symbol, we count the number of
2466 relocations we need for this symbol. */
2468 head
= &((struct elf32_mb_link_hash_entry
*) h
)->dyn_relocs
;
2471 /* Track dynamic relocs needed for local syms too.
2472 We really need local syms available to do this
2476 Elf_Internal_Sym
*isym
;
2479 isym
= bfd_sym_from_r_symndx (&htab
->sym_sec
,
2484 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2488 vpp
= &elf_section_data (s
)->local_dynrel
;
2489 head
= (struct elf32_mb_dyn_relocs
**) vpp
;
2493 if (p
== NULL
|| p
->sec
!= sec
)
2495 bfd_size_type amt
= sizeof *p
;
2496 p
= ((struct elf32_mb_dyn_relocs
*)
2497 bfd_alloc (htab
->elf
.dynobj
, amt
));
2508 if (r_type
== R_MICROBLAZE_64_PCREL
)
2519 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2522 microblaze_elf_copy_indirect_symbol (struct bfd_link_info
*info
,
2523 struct elf_link_hash_entry
*dir
,
2524 struct elf_link_hash_entry
*ind
)
2526 struct elf32_mb_link_hash_entry
*edir
, *eind
;
2528 edir
= (struct elf32_mb_link_hash_entry
*) dir
;
2529 eind
= (struct elf32_mb_link_hash_entry
*) ind
;
2531 if (eind
->dyn_relocs
!= NULL
)
2533 if (edir
->dyn_relocs
!= NULL
)
2535 struct elf32_mb_dyn_relocs
**pp
;
2536 struct elf32_mb_dyn_relocs
*p
;
2538 if (ind
->root
.type
== bfd_link_hash_indirect
)
2541 /* Add reloc counts against the weak sym to the strong sym
2542 list. Merge any entries against the same section. */
2543 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
2545 struct elf32_mb_dyn_relocs
*q
;
2547 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2548 if (q
->sec
== p
->sec
)
2550 q
->pc_count
+= p
->pc_count
;
2551 q
->count
+= p
->count
;
2558 *pp
= edir
->dyn_relocs
;
2561 edir
->dyn_relocs
= eind
->dyn_relocs
;
2562 eind
->dyn_relocs
= NULL
;
2565 edir
->tls_mask
|= eind
->tls_mask
;
2567 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2571 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2572 struct elf_link_hash_entry
*h
)
2574 struct elf32_mb_link_hash_table
*htab
;
2575 struct elf32_mb_link_hash_entry
* eh
;
2576 struct elf32_mb_dyn_relocs
*p
;
2578 unsigned int power_of_two
;
2580 htab
= elf32_mb_hash_table (info
);
2584 /* If this is a function, put it in the procedure linkage table. We
2585 will fill in the contents of the procedure linkage table later,
2586 when we know the address of the .got section. */
2587 if (h
->type
== STT_FUNC
2590 if (h
->plt
.refcount
<= 0
2591 || SYMBOL_CALLS_LOCAL (info
, h
)
2592 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2593 && h
->root
.type
== bfd_link_hash_undefweak
))
2595 /* This case can occur if we saw a PLT reloc in an input
2596 file, but the symbol was never referred to by a dynamic
2597 object, or if all references were garbage collected. In
2598 such a case, we don't actually need to build a procedure
2599 linkage table, and we can just do a PC32 reloc instead. */
2600 h
->plt
.offset
= (bfd_vma
) -1;
2607 /* It's possible that we incorrectly decided a .plt reloc was
2608 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2609 check_relocs. We can't decide accurately between function and
2610 non-function syms in check-relocs; Objects loaded later in
2611 the link may change h->type. So fix it now. */
2612 h
->plt
.offset
= (bfd_vma
) -1;
2614 /* If this is a weak symbol, and there is a real definition, the
2615 processor independent code will have arranged for us to see the
2616 real definition first, and we can just use the same value. */
2617 if (h
->u
.weakdef
!= NULL
)
2619 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2620 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2621 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2622 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2626 /* This is a reference to a symbol defined by a dynamic object which
2627 is not a function. */
2629 /* If we are creating a shared library, we must presume that the
2630 only references to the symbol are via the global offset table.
2631 For such cases we need not do anything here; the relocations will
2632 be handled correctly by relocate_section. */
2633 if (bfd_link_pic (info
))
2636 /* If there are no references to this symbol that do not use the
2637 GOT, we don't need to generate a copy reloc. */
2638 if (!h
->non_got_ref
)
2641 /* If -z nocopyreloc was given, we won't generate them either. */
2642 if (info
->nocopyreloc
)
2648 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2649 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2651 s
= p
->sec
->output_section
;
2652 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2656 /* If we didn't find any dynamic relocs in read-only sections, then
2657 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2664 /* We must allocate the symbol in our .dynbss section, which will
2665 become part of the .bss section of the executable. There will be
2666 an entry for this symbol in the .dynsym section. The dynamic
2667 object will contain position independent code, so all references
2668 from the dynamic object to this symbol will go through the global
2669 offset table. The dynamic linker will use the .dynsym entry to
2670 determine the address it must put in the global offset table, so
2671 both the dynamic object and the regular object will refer to the
2672 same memory location for the variable. */
2674 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2675 to copy the initial value out of the dynamic object and into the
2676 runtime process image. */
2677 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2679 s
= htab
->elf
.sdynrelro
;
2680 srel
= htab
->elf
.sreldynrelro
;
2684 s
= htab
->elf
.sdynbss
;
2685 srel
= htab
->elf
.srelbss
;
2687 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2689 srel
->size
+= sizeof (Elf32_External_Rela
);
2693 /* We need to figure out the alignment required for this symbol. I
2694 have no idea how ELF linkers handle this. */
2695 power_of_two
= bfd_log2 (h
->size
);
2696 if (power_of_two
> 3)
2699 /* Apply the required alignment. */
2700 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
2701 if (power_of_two
> s
->alignment_power
)
2703 if (!bfd_set_section_alignment (s
->owner
, s
, power_of_two
))
2707 /* Define the symbol as being at this point in the section. */
2708 h
->root
.u
.def
.section
= s
;
2709 h
->root
.u
.def
.value
= s
->size
;
2711 /* Increment the section size to make room for the symbol. */
2716 /* Allocate space in .plt, .got and associated reloc sections for
2720 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * dat
)
2722 struct bfd_link_info
*info
;
2723 struct elf32_mb_link_hash_table
*htab
;
2724 struct elf32_mb_link_hash_entry
*eh
;
2725 struct elf32_mb_dyn_relocs
*p
;
2727 if (h
->root
.type
== bfd_link_hash_indirect
)
2730 info
= (struct bfd_link_info
*) dat
;
2731 htab
= elf32_mb_hash_table (info
);
2735 if (htab
->elf
.dynamic_sections_created
2736 && h
->plt
.refcount
> 0)
2738 /* Make sure this symbol is output as a dynamic symbol.
2739 Undefined weak syms won't yet be marked as dynamic. */
2740 if (h
->dynindx
== -1
2741 && !h
->forced_local
)
2743 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2747 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), h
))
2749 asection
*s
= htab
->elf
.splt
;
2751 /* The first entry in .plt is reserved. */
2753 s
->size
= PLT_ENTRY_SIZE
;
2755 h
->plt
.offset
= s
->size
;
2757 /* If this symbol is not defined in a regular file, and we are
2758 not generating a shared library, then set the symbol to this
2759 location in the .plt. This is required to make function
2760 pointers compare as equal between the normal executable and
2761 the shared library. */
2762 if (! bfd_link_pic (info
)
2765 h
->root
.u
.def
.section
= s
;
2766 h
->root
.u
.def
.value
= h
->plt
.offset
;
2769 /* Make room for this entry. */
2770 s
->size
+= PLT_ENTRY_SIZE
;
2772 /* We also need to make an entry in the .got.plt section, which
2773 will be placed in the .got section by the linker script. */
2774 htab
->elf
.sgotplt
->size
+= 4;
2776 /* We also need to make an entry in the .rel.plt section. */
2777 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rela
);
2781 h
->plt
.offset
= (bfd_vma
) -1;
2787 h
->plt
.offset
= (bfd_vma
) -1;
2791 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2792 if (h
->got
.refcount
> 0)
2797 /* Make sure this symbol is output as a dynamic symbol.
2798 Undefined weak syms won't yet be marked as dynamic. */
2799 if (h
->dynindx
== -1
2800 && !h
->forced_local
)
2802 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2807 if ((eh
->tls_mask
& TLS_TLS
) != 0)
2809 /* Handle TLS Symbol */
2810 if ((eh
->tls_mask
& TLS_LD
) != 0)
2812 if (!eh
->elf
.def_dynamic
)
2813 /* We'll just use htab->tlsld_got.offset. This should
2814 always be the case. It's a little odd if we have
2815 a local dynamic reloc against a non-local symbol. */
2816 htab
->tlsld_got
.refcount
+= 1;
2820 if ((eh
->tls_mask
& TLS_GD
) != 0)
2825 /* Regular (non-TLS) symbol */
2830 h
->got
.offset
= (bfd_vma
) -1;
2835 h
->got
.offset
= s
->size
;
2837 htab
->elf
.srelgot
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
2841 h
->got
.offset
= (bfd_vma
) -1;
2843 if (eh
->dyn_relocs
== NULL
)
2846 /* In the shared -Bsymbolic case, discard space allocated for
2847 dynamic pc-relative relocs against symbols which turn out to be
2848 defined in regular objects. For the normal shared case, discard
2849 space for pc-relative relocs that have become local due to symbol
2850 visibility changes. */
2852 if (bfd_link_pic (info
))
2858 struct elf32_mb_dyn_relocs
**pp
;
2860 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2862 p
->count
-= p
->pc_count
;
2870 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
2871 eh
->dyn_relocs
= NULL
;
2875 /* For the non-shared case, discard space for relocs against
2876 symbols which turn out to need copy relocs or are not
2882 || (htab
->elf
.dynamic_sections_created
2883 && (h
->root
.type
== bfd_link_hash_undefweak
2884 || h
->root
.type
== bfd_link_hash_undefined
))))
2886 /* Make sure this symbol is output as a dynamic symbol.
2887 Undefined weak syms won't yet be marked as dynamic. */
2888 if (h
->dynindx
== -1
2889 && !h
->forced_local
)
2891 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2895 /* If that succeeded, we know we'll be keeping all the
2897 if (h
->dynindx
!= -1)
2901 eh
->dyn_relocs
= NULL
;
2906 /* Finally, allocate space. */
2907 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2909 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
2910 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2916 /* Set the sizes of the dynamic sections. */
2919 microblaze_elf_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2920 struct bfd_link_info
*info
)
2922 struct elf32_mb_link_hash_table
*htab
;
2927 htab
= elf32_mb_hash_table (info
);
2931 dynobj
= htab
->elf
.dynobj
;
2932 BFD_ASSERT (dynobj
!= NULL
);
2934 /* Set up .got offsets for local syms, and space for local dynamic
2936 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2938 bfd_signed_vma
*local_got
;
2939 bfd_signed_vma
*end_local_got
;
2940 bfd_size_type locsymcount
;
2941 Elf_Internal_Shdr
*symtab_hdr
;
2942 unsigned char *lgot_masks
;
2945 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2948 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2950 struct elf32_mb_dyn_relocs
*p
;
2952 for (p
= ((struct elf32_mb_dyn_relocs
*)
2953 elf_section_data (s
)->local_dynrel
);
2957 if (!bfd_is_abs_section (p
->sec
)
2958 && bfd_is_abs_section (p
->sec
->output_section
))
2960 /* Input section has been discarded, either because
2961 it is a copy of a linkonce section or due to
2962 linker script /DISCARD/, so we'll be discarding
2965 else if (p
->count
!= 0)
2967 srel
= elf_section_data (p
->sec
)->sreloc
;
2968 srel
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2969 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2970 info
->flags
|= DF_TEXTREL
;
2975 local_got
= elf_local_got_refcounts (ibfd
);
2979 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2980 locsymcount
= symtab_hdr
->sh_info
;
2981 end_local_got
= local_got
+ locsymcount
;
2982 lgot_masks
= (unsigned char *) end_local_got
;
2984 srel
= htab
->elf
.srelgot
;
2986 for (; local_got
< end_local_got
; ++local_got
, ++lgot_masks
)
2990 unsigned int need
= 0;
2991 if ((*lgot_masks
& TLS_TLS
) != 0)
2993 if ((*lgot_masks
& TLS_GD
) != 0)
2995 if ((*lgot_masks
& TLS_LD
) != 0)
2996 htab
->tlsld_got
.refcount
+= 1;
3003 *local_got
= (bfd_vma
) -1;
3007 *local_got
= s
->size
;
3009 if (bfd_link_pic (info
))
3010 srel
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
3014 *local_got
= (bfd_vma
) -1;
3018 /* Allocate global sym .plt and .got entries, and space for global
3019 sym dynamic relocs. */
3020 elf_link_hash_traverse (elf_hash_table (info
), allocate_dynrelocs
, info
);
3022 if (htab
->tlsld_got
.refcount
> 0)
3024 htab
->tlsld_got
.offset
= htab
->elf
.sgot
->size
;
3025 htab
->elf
.sgot
->size
+= 8;
3026 if (bfd_link_pic (info
))
3027 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
3030 htab
->tlsld_got
.offset
= (bfd_vma
) -1;
3032 if (elf_hash_table (info
)->dynamic_sections_created
)
3034 /* Make space for the trailing nop in .plt. */
3035 if (htab
->elf
.splt
->size
> 0)
3036 htab
->elf
.splt
->size
+= 4;
3039 /* The check_relocs and adjust_dynamic_symbol entry points have
3040 determined the sizes of the various dynamic sections. Allocate
3042 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3045 bfd_boolean strip
= FALSE
;
3047 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3050 /* It's OK to base decisions on the section name, because none
3051 of the dynobj section names depend upon the input files. */
3052 name
= bfd_get_section_name (dynobj
, s
);
3054 if (strncmp (name
, ".rela", 5) == 0)
3058 /* If we don't need this section, strip it from the
3059 output file. This is to handle .rela.bss and
3060 .rela.plt. We must create it in
3061 create_dynamic_sections, because it must be created
3062 before the linker maps input sections to output
3063 sections. The linker does that before
3064 adjust_dynamic_symbol is called, and it is that
3065 function which decides whether anything needs to go
3066 into these sections. */
3071 /* We use the reloc_count field as a counter if we need
3072 to copy relocs into the output file. */
3076 else if (s
!= htab
->elf
.splt
3077 && s
!= htab
->elf
.sgot
3078 && s
!= htab
->elf
.sgotplt
3079 && s
!= htab
->elf
.sdynbss
3080 && s
!= htab
->elf
.sdynrelro
)
3082 /* It's not one of our sections, so don't allocate space. */
3088 s
->flags
|= SEC_EXCLUDE
;
3092 /* Allocate memory for the section contents. */
3093 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3094 Unused entries should be reclaimed before the section's contents
3095 are written out, but at the moment this does not happen. Thus in
3096 order to prevent writing out garbage, we initialise the section's
3097 contents to zero. */
3098 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3099 if (s
->contents
== NULL
&& s
->size
!= 0)
3103 if (elf_hash_table (info
)->dynamic_sections_created
)
3105 /* Add some entries to the .dynamic section. We fill in the
3106 values later, in microblaze_elf_finish_dynamic_sections, but we
3107 must add the entries now so that we get the correct size for
3108 the .dynamic section. The DT_DEBUG entry is filled in by the
3109 dynamic linker and used by the debugger. */
3110 #define add_dynamic_entry(TAG, VAL) \
3111 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3113 if (bfd_link_executable (info
))
3115 if (!add_dynamic_entry (DT_DEBUG
, 0))
3119 if (!add_dynamic_entry (DT_RELA
, 0)
3120 || !add_dynamic_entry (DT_RELASZ
, 0)
3121 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3124 if (htab
->elf
.splt
->size
!= 0)
3126 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3127 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3128 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3129 || !add_dynamic_entry (DT_JMPREL
, 0)
3130 || !add_dynamic_entry (DT_BIND_NOW
, 1))
3134 if (info
->flags
& DF_TEXTREL
)
3136 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3140 #undef add_dynamic_entry
3144 /* Finish up dynamic symbol handling. We set the contents of various
3145 dynamic sections here. */
3148 microblaze_elf_finish_dynamic_symbol (bfd
*output_bfd
,
3149 struct bfd_link_info
*info
,
3150 struct elf_link_hash_entry
*h
,
3151 Elf_Internal_Sym
*sym
)
3153 struct elf32_mb_link_hash_table
*htab
;
3154 struct elf32_mb_link_hash_entry
*eh
= elf32_mb_hash_entry(h
);
3156 htab
= elf32_mb_hash_table (info
);
3160 if (h
->plt
.offset
!= (bfd_vma
) -1)
3165 Elf_Internal_Rela rela
;
3171 /* This symbol has an entry in the procedure linkage table. Set
3173 BFD_ASSERT (h
->dynindx
!= -1);
3175 splt
= htab
->elf
.splt
;
3176 srela
= htab
->elf
.srelplt
;
3177 sgotplt
= htab
->elf
.sgotplt
;
3178 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
&& sgotplt
!= NULL
);
3180 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1; /* first entry reserved. */
3181 got_offset
= (plt_index
+ 3) * 4; /* 3 reserved ??? */
3182 got_addr
= got_offset
;
3184 /* For non-PIC objects we need absolute address of the GOT entry. */
3185 if (!bfd_link_pic (info
))
3186 got_addr
+= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
3188 /* Fill in the entry in the procedure linkage table. */
3189 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_0
+ ((got_addr
>> 16) & 0xffff),
3190 splt
->contents
+ h
->plt
.offset
);
3191 if (bfd_link_pic (info
))
3192 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1
+ (got_addr
& 0xffff),
3193 splt
->contents
+ h
->plt
.offset
+ 4);
3195 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1_NOPIC
+ (got_addr
& 0xffff),
3196 splt
->contents
+ h
->plt
.offset
+ 4);
3197 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_2
,
3198 splt
->contents
+ h
->plt
.offset
+ 8);
3199 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_3
,
3200 splt
->contents
+ h
->plt
.offset
+ 12);
3202 /* Any additions to the .got section??? */
3203 /* bfd_put_32 (output_bfd,
3204 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3205 sgotplt->contents + got_offset); */
3207 /* Fill in the entry in the .rela.plt section. */
3208 rela
.r_offset
= (sgotplt
->output_section
->vma
3209 + sgotplt
->output_offset
3211 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_JUMP_SLOT
);
3213 loc
= srela
->contents
;
3214 loc
+= plt_index
* sizeof (Elf32_External_Rela
);
3215 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3217 if (!h
->def_regular
)
3219 /* Mark the symbol as undefined, rather than as defined in
3220 the .plt section. Zero the value. */
3221 sym
->st_shndx
= SHN_UNDEF
;
3226 /* h->got.refcount to be checked ? */
3227 if (h
->got
.offset
!= (bfd_vma
) -1 &&
3228 ! ((h
->got
.offset
& 1) ||
3229 IS_TLS_LD(eh
->tls_mask
) || IS_TLS_GD(eh
->tls_mask
)))
3235 /* This symbol has an entry in the global offset table. Set it
3238 sgot
= htab
->elf
.sgot
;
3239 srela
= htab
->elf
.srelgot
;
3240 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
3242 offset
= (sgot
->output_section
->vma
+ sgot
->output_offset
3243 + (h
->got
.offset
&~ (bfd_vma
) 1));
3245 /* If this is a -Bsymbolic link, and the symbol is defined
3246 locally, we just want to emit a RELATIVE reloc. Likewise if
3247 the symbol was forced to be local because of a version file.
3248 The entry in the global offset table will already have been
3249 initialized in the relocate_section function. */
3250 if (bfd_link_pic (info
)
3251 && ((info
->symbolic
&& h
->def_regular
)
3252 || h
->dynindx
== -1))
3254 asection
*sec
= h
->root
.u
.def
.section
;
3257 value
= h
->root
.u
.def
.value
;
3258 if (sec
->output_section
!= NULL
)
3259 /* PR 21180: If the output section is NULL, then the symbol is no
3260 longer needed, and in theory the GOT entry is redundant. But
3261 it is too late to change our minds now... */
3262 value
+= sec
->output_section
->vma
+ sec
->output_offset
;
3264 microblaze_elf_output_dynamic_relocation (output_bfd
,
3265 srela
, srela
->reloc_count
++,
3267 R_MICROBLAZE_REL
, offset
,
3272 microblaze_elf_output_dynamic_relocation (output_bfd
,
3273 srela
, srela
->reloc_count
++,
3275 R_MICROBLAZE_GLOB_DAT
,
3279 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3280 sgot
->contents
+ (h
->got
.offset
&~ (bfd_vma
) 1));
3286 Elf_Internal_Rela rela
;
3289 /* This symbols needs a copy reloc. Set it up. */
3291 BFD_ASSERT (h
->dynindx
!= -1);
3293 rela
.r_offset
= (h
->root
.u
.def
.value
3294 + h
->root
.u
.def
.section
->output_section
->vma
3295 + h
->root
.u
.def
.section
->output_offset
);
3296 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_COPY
);
3298 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
3299 s
= htab
->elf
.sreldynrelro
;
3301 s
= htab
->elf
.srelbss
;
3302 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3303 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3306 /* Mark some specially defined symbols as absolute. */
3307 if (h
== htab
->elf
.hdynamic
3308 || h
== htab
->elf
.hgot
3309 || h
== htab
->elf
.hplt
)
3310 sym
->st_shndx
= SHN_ABS
;
3316 /* Finish up the dynamic sections. */
3319 microblaze_elf_finish_dynamic_sections (bfd
*output_bfd
,
3320 struct bfd_link_info
*info
)
3323 asection
*sdyn
, *sgot
;
3324 struct elf32_mb_link_hash_table
*htab
;
3326 htab
= elf32_mb_hash_table (info
);
3330 dynobj
= htab
->elf
.dynobj
;
3332 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3334 if (htab
->elf
.dynamic_sections_created
)
3337 Elf32_External_Dyn
*dyncon
, *dynconend
;
3339 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3340 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3341 for (; dyncon
< dynconend
; dyncon
++)
3343 Elf_Internal_Dyn dyn
;
3347 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3352 s
= htab
->elf
.sgotplt
;
3357 s
= htab
->elf
.srelplt
;
3362 s
= htab
->elf
.srelplt
;
3375 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3377 dyn
.d_un
.d_val
= s
->size
;
3379 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3382 splt
= htab
->elf
.splt
;
3383 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
3385 /* Clear the first entry in the procedure linkage table,
3386 and put a nop in the last four bytes. */
3389 memset (splt
->contents
, 0, PLT_ENTRY_SIZE
);
3390 bfd_put_32 (output_bfd
, (bfd_vma
) 0x80000000 /* nop. */,
3391 splt
->contents
+ splt
->size
- 4);
3394 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
3397 /* Set the first entry in the global offset table to the address of
3398 the dynamic section. */
3399 sgot
= htab
->elf
.sgotplt
;
3400 if (sgot
&& sgot
->size
> 0)
3403 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
3405 bfd_put_32 (output_bfd
,
3406 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
3408 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3411 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
3412 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3417 /* Hook called by the linker routine which adds symbols from an object
3418 file. We use it to put .comm items in .sbss, and not .bss. */
3421 microblaze_elf_add_symbol_hook (bfd
*abfd
,
3422 struct bfd_link_info
*info
,
3423 Elf_Internal_Sym
*sym
,
3424 const char **namep ATTRIBUTE_UNUSED
,
3425 flagword
*flagsp ATTRIBUTE_UNUSED
,
3429 if (sym
->st_shndx
== SHN_COMMON
3430 && !bfd_link_relocatable (info
)
3431 && sym
->st_size
<= elf_gp_size (abfd
))
3433 /* Common symbols less than or equal to -G nn bytes are automatically
3435 *secp
= bfd_make_section_old_way (abfd
, ".sbss");
3437 || ! bfd_set_section_flags (abfd
, *secp
, SEC_IS_COMMON
))
3440 *valp
= sym
->st_size
;
3446 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec
3447 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3449 #define TARGET_BIG_SYM microblaze_elf32_vec
3450 #define TARGET_BIG_NAME "elf32-microblaze"
3452 #define ELF_ARCH bfd_arch_microblaze
3453 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3454 #define ELF_MACHINE_CODE EM_MICROBLAZE
3455 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3456 #define ELF_MAXPAGESIZE 0x1000
3457 #define elf_info_to_howto microblaze_elf_info_to_howto
3458 #define elf_info_to_howto_rel NULL
3460 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3461 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3462 #define elf_backend_relocate_section microblaze_elf_relocate_section
3463 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3464 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
3465 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3467 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3468 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3469 #define elf_backend_check_relocs microblaze_elf_check_relocs
3470 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3471 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3472 #define elf_backend_can_gc_sections 1
3473 #define elf_backend_can_refcount 1
3474 #define elf_backend_want_got_plt 1
3475 #define elf_backend_plt_readonly 1
3476 #define elf_backend_got_header_size 12
3477 #define elf_backend_want_dynrelro 1
3478 #define elf_backend_rela_normal 1
3479 #define elf_backend_dtrel_excludes_plt 1
3481 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3482 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3483 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3484 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3485 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3486 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3488 #include "elf32-target.h"