1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
3 Copyright (C) 2009-2018 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
,
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 (_("%pB: unsupported relocation type %#x"),
658 bfd_set_error (bfd_error_bad_value
);
662 cache_ptr
->howto
= microblaze_elf_howto_table
[r_type
];
666 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
669 microblaze_elf_is_local_label_name (bfd
*abfd
, const char *name
)
671 if (name
[0] == 'L' && name
[1] == '.')
674 if (name
[0] == '$' && name
[1] == 'L')
677 /* With gcc, the labels go back to starting with '.', so we accept
678 the generic ELF local label syntax as well. */
679 return _bfd_elf_is_local_label_name (abfd
, name
);
682 /* ELF linker hash entry. */
684 struct elf32_mb_link_hash_entry
686 struct elf_link_hash_entry elf
;
688 /* Track dynamic relocs copied for this symbol. */
689 struct elf_dyn_relocs
*dyn_relocs
;
691 /* TLS Reference Types for the symbol; Updated by check_relocs */
692 #define TLS_GD 1 /* GD reloc. */
693 #define TLS_LD 2 /* LD reloc. */
694 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
695 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
696 #define TLS_TLS 16 /* Any TLS reloc. */
697 unsigned char tls_mask
;
701 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD))
702 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD))
703 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL))
704 #define IS_TLS_NONE(x) (x == 0)
706 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
708 /* ELF linker hash table. */
710 struct elf32_mb_link_hash_table
712 struct elf_link_hash_table elf
;
714 /* Small local sym to section mapping cache. */
715 struct sym_cache sym_sec
;
717 /* TLS Local Dynamic GOT Entry */
719 bfd_signed_vma refcount
;
724 /* Nonzero if this section has TLS related relocations. */
725 #define has_tls_reloc sec_flg0
727 /* Get the ELF linker hash table from a link_info structure. */
729 #define elf32_mb_hash_table(p) \
730 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
731 == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL)
733 /* Create an entry in a microblaze ELF linker hash table. */
735 static struct bfd_hash_entry
*
736 link_hash_newfunc (struct bfd_hash_entry
*entry
,
737 struct bfd_hash_table
*table
,
740 /* Allocate the structure if it has not already been allocated by a
744 entry
= bfd_hash_allocate (table
,
745 sizeof (struct elf32_mb_link_hash_entry
));
750 /* Call the allocation method of the superclass. */
751 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
754 struct elf32_mb_link_hash_entry
*eh
;
756 eh
= (struct elf32_mb_link_hash_entry
*) entry
;
757 eh
->dyn_relocs
= NULL
;
764 /* Create a mb ELF linker hash table. */
766 static struct bfd_link_hash_table
*
767 microblaze_elf_link_hash_table_create (bfd
*abfd
)
769 struct elf32_mb_link_hash_table
*ret
;
770 bfd_size_type amt
= sizeof (struct elf32_mb_link_hash_table
);
772 ret
= (struct elf32_mb_link_hash_table
*) bfd_zmalloc (amt
);
776 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
777 sizeof (struct elf32_mb_link_hash_entry
),
778 MICROBLAZE_ELF_DATA
))
784 return &ret
->elf
.root
;
787 /* Set the values of the small data pointers. */
790 microblaze_elf_final_sdp (struct bfd_link_info
*info
)
792 struct bfd_link_hash_entry
*h
;
794 h
= bfd_link_hash_lookup (info
->hash
, RO_SDA_ANCHOR_NAME
, FALSE
, FALSE
, TRUE
);
795 if (h
!= (struct bfd_link_hash_entry
*) NULL
796 && h
->type
== bfd_link_hash_defined
)
797 ro_small_data_pointer
= (h
->u
.def
.value
798 + h
->u
.def
.section
->output_section
->vma
799 + h
->u
.def
.section
->output_offset
);
801 h
= bfd_link_hash_lookup (info
->hash
, RW_SDA_ANCHOR_NAME
, FALSE
, FALSE
, TRUE
);
802 if (h
!= (struct bfd_link_hash_entry
*) NULL
803 && h
->type
== bfd_link_hash_defined
)
804 rw_small_data_pointer
= (h
->u
.def
.value
805 + h
->u
.def
.section
->output_section
->vma
806 + h
->u
.def
.section
->output_offset
);
810 dtprel_base (struct bfd_link_info
*info
)
812 /* If tls_sec is NULL, we should have signalled an error already. */
813 if (elf_hash_table (info
)->tls_sec
== NULL
)
815 return elf_hash_table (info
)->tls_sec
->vma
;
818 /* The size of the thread control block. */
821 /* Output a simple dynamic relocation into SRELOC. */
824 microblaze_elf_output_dynamic_relocation (bfd
*output_bfd
,
826 unsigned long reloc_index
,
833 Elf_Internal_Rela rel
;
835 rel
.r_info
= ELF32_R_INFO (indx
, r_type
);
836 rel
.r_offset
= offset
;
837 rel
.r_addend
= addend
;
839 bfd_elf32_swap_reloca_out (output_bfd
, &rel
,
840 (sreloc
->contents
+ reloc_index
* sizeof (Elf32_External_Rela
)));
843 /* This code is taken from elf32-m32r.c
844 There is some attempt to make this function usable for many architectures,
845 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
846 if only to serve as a learning tool.
848 The RELOCATE_SECTION function is called by the new ELF backend linker
849 to handle the relocations for a section.
851 The relocs are always passed as Rela structures; if the section
852 actually uses Rel structures, the r_addend field will always be
855 This function is responsible for adjust the section contents as
856 necessary, and (if using Rela relocs and generating a
857 relocatable output file) adjusting the reloc addend as
860 This function does not have to worry about setting the reloc
861 address or the reloc symbol index.
863 LOCAL_SYMS is a pointer to the swapped in local symbols.
865 LOCAL_SECTIONS is an array giving the section in the input file
866 corresponding to the st_shndx field of each local symbol.
868 The global hash table entry for the global symbols can be found
869 via elf_sym_hashes (input_bfd).
871 When generating relocatable output, this function must handle
872 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
873 going to be the section symbol corresponding to the output
874 section, which means that the addend must be adjusted
878 microblaze_elf_relocate_section (bfd
*output_bfd
,
879 struct bfd_link_info
*info
,
881 asection
*input_section
,
883 Elf_Internal_Rela
*relocs
,
884 Elf_Internal_Sym
*local_syms
,
885 asection
**local_sections
)
887 struct elf32_mb_link_hash_table
*htab
;
888 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
889 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
890 Elf_Internal_Rela
*rel
, *relend
;
891 int endian
= (bfd_little_endian (output_bfd
)) ? 0 : 2;
892 /* Assume success. */
893 bfd_boolean ret
= TRUE
;
895 bfd_vma
*local_got_offsets
;
896 unsigned int tls_type
;
898 if (!microblaze_elf_howto_table
[R_MICROBLAZE_max
-1])
899 microblaze_elf_howto_init ();
901 htab
= elf32_mb_hash_table (info
);
905 local_got_offsets
= elf_local_got_offsets (input_bfd
);
907 sreloc
= elf_section_data (input_section
)->sreloc
;
910 relend
= relocs
+ input_section
->reloc_count
;
911 for (; rel
< relend
; rel
++)
914 reloc_howto_type
*howto
;
915 unsigned long r_symndx
;
916 bfd_vma addend
= rel
->r_addend
;
917 bfd_vma offset
= rel
->r_offset
;
918 struct elf_link_hash_entry
*h
;
919 Elf_Internal_Sym
*sym
;
921 const char *sym_name
;
922 bfd_reloc_status_type r
= bfd_reloc_ok
;
923 const char *errmsg
= NULL
;
924 bfd_boolean unresolved_reloc
= FALSE
;
927 r_type
= ELF32_R_TYPE (rel
->r_info
);
930 if (r_type
< 0 || r_type
>= (int) R_MICROBLAZE_max
)
932 /* xgettext:c-format */
933 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
934 input_bfd
, (int) r_type
);
935 bfd_set_error (bfd_error_bad_value
);
940 howto
= microblaze_elf_howto_table
[r_type
];
941 r_symndx
= ELF32_R_SYM (rel
->r_info
);
943 if (bfd_link_relocatable (info
))
945 /* This is a relocatable link. We don't have to change
946 anything, unless the reloc is against a section symbol,
947 in which case we have to adjust according to where the
948 section symbol winds up in the output section. */
950 if (r_symndx
>= symtab_hdr
->sh_info
)
951 /* External symbol. */
955 sym
= local_syms
+ r_symndx
;
956 sym_name
= "<local symbol>";
957 /* STT_SECTION: symbol is associated with a section. */
958 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
959 /* Symbol isn't associated with a section. Nothing to do. */
962 sec
= local_sections
[r_symndx
];
963 addend
+= sec
->output_offset
+ sym
->st_value
;
965 /* This can't be done for USE_REL because it doesn't mean anything
966 and elf_link_input_bfd asserts this stays zero. */
967 /* rel->r_addend = addend; */
971 /* Addends are stored with relocs. We're done. */
974 /* If partial_inplace, we need to store any additional addend
975 back in the section. */
976 if (!howto
->partial_inplace
)
978 /* ??? Here is a nice place to call a special_function like handler. */
979 r
= _bfd_relocate_contents (howto
, input_bfd
, addend
,
986 bfd_boolean resolved_to_zero
;
988 /* This is a final link. */
991 unresolved_reloc
= FALSE
;
993 if (r_symndx
< symtab_hdr
->sh_info
)
996 sym
= local_syms
+ r_symndx
;
997 sec
= local_sections
[r_symndx
];
1000 sym_name
= "<local symbol>";
1001 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1002 /* r_addend may have changed if the reference section was
1004 addend
= rel
->r_addend
;
1008 /* External symbol. */
1009 bfd_boolean warned ATTRIBUTE_UNUSED
;
1010 bfd_boolean ignored ATTRIBUTE_UNUSED
;
1012 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1013 r_symndx
, symtab_hdr
, sym_hashes
,
1015 unresolved_reloc
, warned
, ignored
);
1016 sym_name
= h
->root
.root
.string
;
1019 /* Sanity check the address. */
1020 if (offset
> bfd_get_section_limit (input_bfd
, input_section
))
1022 r
= bfd_reloc_outofrange
;
1026 resolved_to_zero
= (h
!= NULL
1027 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
1029 switch ((int) r_type
)
1031 case (int) R_MICROBLAZE_SRO32
:
1035 /* Only relocate if the symbol is defined. */
1038 name
= bfd_get_section_name (sec
->owner
, sec
);
1040 if (strcmp (name
, ".sdata2") == 0
1041 || strcmp (name
, ".sbss2") == 0)
1043 if (ro_small_data_pointer
== 0)
1044 microblaze_elf_final_sdp (info
);
1045 if (ro_small_data_pointer
== 0)
1048 r
= bfd_reloc_undefined
;
1052 /* At this point `relocation' contains the object's
1054 relocation
-= ro_small_data_pointer
;
1055 /* Now it contains the offset from _SDA2_BASE_. */
1056 r
= _bfd_final_link_relocate (howto
, input_bfd
,
1059 relocation
, addend
);
1064 /* xgettext:c-format */
1065 (_("%pB: the target (%s) of an %s relocation"
1066 " is in the wrong section (%pA)"),
1069 microblaze_elf_howto_table
[(int) r_type
]->name
,
1071 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1079 case (int) R_MICROBLAZE_SRW32
:
1083 /* Only relocate if the symbol is defined. */
1086 name
= bfd_get_section_name (sec
->owner
, sec
);
1088 if (strcmp (name
, ".sdata") == 0
1089 || strcmp (name
, ".sbss") == 0)
1091 if (rw_small_data_pointer
== 0)
1092 microblaze_elf_final_sdp (info
);
1093 if (rw_small_data_pointer
== 0)
1096 r
= bfd_reloc_undefined
;
1100 /* At this point `relocation' contains the object's
1102 relocation
-= rw_small_data_pointer
;
1103 /* Now it contains the offset from _SDA_BASE_. */
1104 r
= _bfd_final_link_relocate (howto
, input_bfd
,
1107 relocation
, addend
);
1112 /* xgettext:c-format */
1113 (_("%pB: the target (%s) of an %s relocation"
1114 " is in the wrong section (%pA)"),
1117 microblaze_elf_howto_table
[(int) r_type
]->name
,
1119 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1127 case (int) R_MICROBLAZE_32_SYM_OP_SYM
:
1128 break; /* Do nothing. */
1130 case (int) R_MICROBLAZE_GOTPC_64
:
1131 relocation
= (htab
->elf
.sgotplt
->output_section
->vma
1132 + htab
->elf
.sgotplt
->output_offset
);
1133 relocation
-= (input_section
->output_section
->vma
1134 + input_section
->output_offset
1135 + offset
+ INST_WORD_SIZE
);
1136 relocation
+= addend
;
1137 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1138 contents
+ offset
+ endian
);
1139 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1140 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1143 case (int) R_MICROBLAZE_PLT_64
:
1146 if (htab
->elf
.splt
!= NULL
&& h
!= NULL
1147 && h
->plt
.offset
!= (bfd_vma
) -1)
1149 relocation
= (htab
->elf
.splt
->output_section
->vma
1150 + htab
->elf
.splt
->output_offset
1152 unresolved_reloc
= FALSE
;
1153 immediate
= relocation
- (input_section
->output_section
->vma
1154 + input_section
->output_offset
1155 + offset
+ INST_WORD_SIZE
);
1156 bfd_put_16 (input_bfd
, (immediate
>> 16) & 0xffff,
1157 contents
+ offset
+ endian
);
1158 bfd_put_16 (input_bfd
, immediate
& 0xffff,
1159 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1163 relocation
-= (input_section
->output_section
->vma
1164 + input_section
->output_offset
1165 + offset
+ INST_WORD_SIZE
);
1166 immediate
= relocation
;
1167 bfd_put_16 (input_bfd
, (immediate
>> 16) & 0xffff,
1168 contents
+ offset
+ endian
);
1169 bfd_put_16 (input_bfd
, immediate
& 0xffff,
1170 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1175 case (int) R_MICROBLAZE_TLSGD
:
1176 tls_type
= (TLS_TLS
| TLS_GD
);
1178 case (int) R_MICROBLAZE_TLSLD
:
1179 tls_type
= (TLS_TLS
| TLS_LD
);
1182 case (int) R_MICROBLAZE_GOT_64
:
1187 bfd_vma static_value
;
1189 bfd_boolean need_relocs
= FALSE
;
1190 if (htab
->elf
.sgot
== NULL
)
1196 /* 1. Identify GOT Offset;
1197 2. Compute Static Values
1198 3. Process Module Id, Process Offset
1199 4. Fixup Relocation with GOT offset value. */
1201 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1202 if (IS_TLS_LD (tls_type
))
1203 offp
= &htab
->tlsld_got
.offset
;
1206 if (htab
->elf
.sgotplt
!= NULL
1207 && h
->got
.offset
!= (bfd_vma
) -1)
1208 offp
= &h
->got
.offset
;
1214 if (local_got_offsets
== NULL
)
1216 offp
= &local_got_offsets
[r_symndx
];
1225 if (IS_TLS_LD(tls_type
) || IS_TLS_GD(tls_type
))
1228 /* Symbol index to use for relocs */
1232 elf_hash_table (info
)->dynamic_sections_created
;
1234 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1235 bfd_link_pic (info
),
1237 && (!bfd_link_pic (info
)
1238 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
1242 /* Need to generate relocs ? */
1243 if ((bfd_link_pic (info
) || indx
!= 0)
1245 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1246 && !resolved_to_zero
)
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
->elf
.sgot
->output_section
->vma
1259 + htab
->elf
.sgot
->output_offset
1262 /* Process module-id */
1263 if (IS_TLS_LD(tls_type
))
1265 if (! bfd_link_pic (info
))
1266 bfd_put_32 (output_bfd
, 1,
1267 htab
->elf
.sgot
->contents
+ off
);
1269 microblaze_elf_output_dynamic_relocation
1272 htab
->elf
.srelgot
->reloc_count
++,
1273 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32
,
1276 else if (IS_TLS_GD(tls_type
))
1279 bfd_put_32 (output_bfd
, 1,
1280 htab
->elf
.sgot
->contents
+ off
);
1282 microblaze_elf_output_dynamic_relocation
1285 htab
->elf
.srelgot
->reloc_count
++,
1286 /* symindex= */ indx
, R_MICROBLAZE_TLSDTPMOD32
,
1287 got_offset
, indx
? 0 : static_value
);
1290 /* Process Offset */
1291 if (htab
->elf
.srelgot
== NULL
)
1294 got_offset
= (htab
->elf
.sgot
->output_section
->vma
1295 + htab
->elf
.sgot
->output_offset
1297 if (IS_TLS_LD(tls_type
))
1299 /* For LD, offset should be 0 */
1301 bfd_put_32 (output_bfd
, 0,
1302 htab
->elf
.sgot
->contents
+ off2
);
1304 else if (IS_TLS_GD(tls_type
))
1307 static_value
-= dtprel_base(info
);
1309 microblaze_elf_output_dynamic_relocation
1312 htab
->elf
.srelgot
->reloc_count
++,
1313 /* symindex= */ indx
, R_MICROBLAZE_TLSDTPREL32
,
1314 got_offset
, indx
? 0 : static_value
);
1316 bfd_put_32 (output_bfd
, static_value
,
1317 htab
->elf
.sgot
->contents
+ off2
);
1321 bfd_put_32 (output_bfd
, static_value
,
1322 htab
->elf
.sgot
->contents
+ off2
);
1324 /* Relocs for dyn symbols generated by
1325 finish_dynamic_symbols */
1326 if (bfd_link_pic (info
) && h
== NULL
)
1329 microblaze_elf_output_dynamic_relocation
1332 htab
->elf
.srelgot
->reloc_count
++,
1333 /* symindex= */ indx
, R_MICROBLAZE_REL
,
1334 got_offset
, static_value
);
1339 /* 4. Fixup Relocation with GOT offset value
1340 Compute relative address of GOT entry for applying
1341 the current relocation */
1342 relocation
= htab
->elf
.sgot
->output_section
->vma
1343 + htab
->elf
.sgot
->output_offset
1345 - htab
->elf
.sgotplt
->output_section
->vma
1346 - htab
->elf
.sgotplt
->output_offset
;
1348 /* Apply Current Relocation */
1349 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1350 contents
+ offset
+ endian
);
1351 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1352 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1354 unresolved_reloc
= FALSE
;
1358 case (int) R_MICROBLAZE_GOTOFF_64
:
1361 unsigned short lo
, high
;
1362 relocation
+= addend
;
1363 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
1364 + htab
->elf
.sgotplt
->output_offset
);
1365 /* Write this value into correct location. */
1366 immediate
= relocation
;
1367 lo
= immediate
& 0x0000ffff;
1368 high
= (immediate
>> 16) & 0x0000ffff;
1369 bfd_put_16 (input_bfd
, high
, contents
+ offset
+ endian
);
1370 bfd_put_16 (input_bfd
, lo
,
1371 contents
+ offset
+ INST_WORD_SIZE
+ endian
);
1375 case (int) R_MICROBLAZE_GOTOFF_32
:
1377 relocation
+= addend
;
1378 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
1379 + htab
->elf
.sgotplt
->output_offset
);
1380 /* Write this value into correct location. */
1381 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1385 case (int) R_MICROBLAZE_TLSDTPREL64
:
1386 relocation
+= addend
;
1387 relocation
-= dtprel_base(info
);
1388 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1389 contents
+ offset
+ 2);
1390 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1391 contents
+ offset
+ 2 + INST_WORD_SIZE
);
1393 case (int) R_MICROBLAZE_64_PCREL
:
1394 case (int) R_MICROBLAZE_64
:
1395 case (int) R_MICROBLAZE_32
:
1397 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1398 from removed linkonce sections, or sections discarded by
1400 if (r_symndx
== STN_UNDEF
|| (input_section
->flags
& SEC_ALLOC
) == 0)
1402 relocation
+= addend
;
1403 if (r_type
== R_MICROBLAZE_32
)
1404 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1407 if (r_type
== R_MICROBLAZE_64_PCREL
)
1408 relocation
-= (input_section
->output_section
->vma
1409 + input_section
->output_offset
1410 + offset
+ INST_WORD_SIZE
);
1411 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1412 contents
+ offset
+ endian
);
1413 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1414 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1419 if ((bfd_link_pic (info
)
1421 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1422 && !resolved_to_zero
)
1423 || h
->root
.type
!= bfd_link_hash_undefweak
)
1424 && (!howto
->pc_relative
1428 || !h
->def_regular
))))
1429 || (!bfd_link_pic (info
)
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
;
1483 (_("%pB: 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 (*info
->callbacks
->reloc_overflow
)
1547 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1548 (bfd_vma
) 0, input_bfd
, input_section
, offset
);
1551 case bfd_reloc_undefined
:
1552 (*info
->callbacks
->undefined_symbol
)
1553 (info
, name
, input_bfd
, input_section
, offset
, TRUE
);
1556 case bfd_reloc_outofrange
:
1557 errmsg
= _("internal error: out of range error");
1560 case bfd_reloc_notsupported
:
1561 errmsg
= _("internal error: unsupported relocation error");
1564 case bfd_reloc_dangerous
:
1565 errmsg
= _("internal error: dangerous error");
1569 errmsg
= _("internal error: unknown error");
1572 (*info
->callbacks
->warning
) (info
, errmsg
, name
, input_bfd
,
1573 input_section
, offset
);
1582 /* Calculate fixup value for reference. */
1585 calc_fixup (bfd_vma start
, bfd_vma size
, asection
*sec
)
1587 bfd_vma end
= start
+ size
;
1590 if (sec
== NULL
|| sec
->relax
== NULL
)
1593 /* Look for addr in relax table, total fixup value. */
1594 for (i
= 0; i
< sec
->relax_count
; i
++)
1596 if (end
<= sec
->relax
[i
].addr
)
1598 if ((end
!= start
) && (start
> sec
->relax
[i
].addr
))
1600 fixup
+= sec
->relax
[i
].size
;
1605 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1606 a 32-bit instruction. */
1608 microblaze_bfd_write_imm_value_32 (bfd
*abfd
, bfd_byte
*bfd_addr
, bfd_vma val
)
1610 unsigned long instr
= bfd_get_32 (abfd
, bfd_addr
);
1611 instr
&= ~0x0000ffff;
1612 instr
|= (val
& 0x0000ffff);
1613 bfd_put_32 (abfd
, instr
, bfd_addr
);
1616 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1617 two consecutive 32-bit instructions. */
1619 microblaze_bfd_write_imm_value_64 (bfd
*abfd
, bfd_byte
*bfd_addr
, bfd_vma val
)
1621 unsigned long instr_hi
;
1622 unsigned long instr_lo
;
1624 instr_hi
= bfd_get_32 (abfd
, bfd_addr
);
1625 instr_hi
&= ~0x0000ffff;
1626 instr_hi
|= ((val
>> 16) & 0x0000ffff);
1627 bfd_put_32 (abfd
, instr_hi
, bfd_addr
);
1629 instr_lo
= bfd_get_32 (abfd
, bfd_addr
+ INST_WORD_SIZE
);
1630 instr_lo
&= ~0x0000ffff;
1631 instr_lo
|= (val
& 0x0000ffff);
1632 bfd_put_32 (abfd
, instr_lo
, bfd_addr
+ INST_WORD_SIZE
);
1636 microblaze_elf_relax_section (bfd
*abfd
,
1638 struct bfd_link_info
*link_info
,
1641 Elf_Internal_Shdr
*symtab_hdr
;
1642 Elf_Internal_Rela
*internal_relocs
;
1643 Elf_Internal_Rela
*free_relocs
= NULL
;
1644 Elf_Internal_Rela
*irel
, *irelend
;
1645 bfd_byte
*contents
= NULL
;
1646 bfd_byte
*free_contents
= NULL
;
1651 struct elf_link_hash_entry
*sym_hash
;
1652 Elf_Internal_Sym
*isymbuf
, *isymend
;
1653 Elf_Internal_Sym
*isym
;
1658 /* We only do this once per section. We may be able to delete some code
1659 by running multiple passes, but it is not worth it. */
1662 /* Only do this for a text section. */
1663 if (bfd_link_relocatable (link_info
)
1664 || (sec
->flags
& SEC_RELOC
) == 0
1665 || (sec
->reloc_count
== 0)
1666 || (sec
->flags
& SEC_CODE
) == 0)
1669 BFD_ASSERT ((sec
->size
> 0) || (sec
->rawsize
> 0));
1671 /* If this is the first time we have been called for this section,
1672 initialize the cooked size. */
1674 sec
->size
= sec
->rawsize
;
1676 /* Get symbols for this section. */
1677 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1678 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1679 symcount
= symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
1680 if (isymbuf
== NULL
)
1681 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
, symcount
,
1682 0, NULL
, NULL
, NULL
);
1683 BFD_ASSERT (isymbuf
!= NULL
);
1685 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, link_info
->keep_memory
);
1686 if (internal_relocs
== NULL
)
1688 if (! link_info
->keep_memory
)
1689 free_relocs
= internal_relocs
;
1691 sec
->relax
= (struct relax_table
*) bfd_malloc ((sec
->reloc_count
+ 1)
1692 * sizeof (struct relax_table
));
1693 if (sec
->relax
== NULL
)
1695 sec
->relax_count
= 0;
1697 irelend
= internal_relocs
+ sec
->reloc_count
;
1699 for (irel
= internal_relocs
; irel
< irelend
; irel
++, rel_count
++)
1702 if ((ELF32_R_TYPE (irel
->r_info
) != (int) R_MICROBLAZE_64_PCREL
)
1703 && (ELF32_R_TYPE (irel
->r_info
) != (int) R_MICROBLAZE_64
))
1704 continue; /* Can't delete this reloc. */
1706 /* Get the section contents. */
1707 if (contents
== NULL
)
1709 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1710 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1713 contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
1714 if (contents
== NULL
)
1716 free_contents
= contents
;
1718 if (!bfd_get_section_contents (abfd
, sec
, contents
,
1719 (file_ptr
) 0, sec
->size
))
1721 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1725 /* Get the value of the symbol referred to by the reloc. */
1726 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
1728 /* A local symbol. */
1731 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
1732 if (isym
->st_shndx
== SHN_UNDEF
)
1733 sym_sec
= bfd_und_section_ptr
;
1734 else if (isym
->st_shndx
== SHN_ABS
)
1735 sym_sec
= bfd_abs_section_ptr
;
1736 else if (isym
->st_shndx
== SHN_COMMON
)
1737 sym_sec
= bfd_com_section_ptr
;
1739 sym_sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1741 symval
= _bfd_elf_rela_local_sym (abfd
, isym
, &sym_sec
, irel
);
1746 struct elf_link_hash_entry
*h
;
1748 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
1749 h
= elf_sym_hashes (abfd
)[indx
];
1750 BFD_ASSERT (h
!= NULL
);
1752 if (h
->root
.type
!= bfd_link_hash_defined
1753 && h
->root
.type
!= bfd_link_hash_defweak
)
1754 /* This appears to be a reference to an undefined
1755 symbol. Just ignore it--it will be caught by the
1756 regular reloc processing. */
1759 symval
= (h
->root
.u
.def
.value
1760 + h
->root
.u
.def
.section
->output_section
->vma
1761 + h
->root
.u
.def
.section
->output_offset
);
1764 /* If this is a PC-relative reloc, subtract the instr offset from
1765 the symbol value. */
1766 if (ELF32_R_TYPE (irel
->r_info
) == (int) R_MICROBLAZE_64_PCREL
)
1768 symval
= symval
+ irel
->r_addend
1770 + sec
->output_section
->vma
1771 + sec
->output_offset
);
1774 symval
+= irel
->r_addend
;
1776 if ((symval
& 0xffff8000) == 0
1777 || (symval
& 0xffff8000) == 0xffff8000)
1779 /* We can delete this instruction. */
1780 sec
->relax
[sec
->relax_count
].addr
= irel
->r_offset
;
1781 sec
->relax
[sec
->relax_count
].size
= INST_WORD_SIZE
;
1784 /* Rewrite relocation type. */
1785 switch ((enum elf_microblaze_reloc_type
) ELF32_R_TYPE (irel
->r_info
))
1787 case R_MICROBLAZE_64_PCREL
:
1788 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1789 (int) R_MICROBLAZE_32_PCREL_LO
);
1791 case R_MICROBLAZE_64
:
1792 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1793 (int) R_MICROBLAZE_32_LO
);
1796 /* Cannot happen. */
1800 } /* Loop through all relocations. */
1802 /* Loop through the relocs again, and see if anything needs to change. */
1803 if (sec
->relax_count
> 0)
1805 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
1807 sec
->relax
[sec
->relax_count
].addr
= sec
->size
;
1809 for (irel
= internal_relocs
; irel
< irelend
; irel
++, rel_count
++)
1813 /* Get the new reloc address. */
1814 nraddr
= irel
->r_offset
- calc_fixup (irel
->r_offset
, 0, sec
);
1815 switch ((enum elf_microblaze_reloc_type
) ELF32_R_TYPE (irel
->r_info
))
1819 case R_MICROBLAZE_64_PCREL
:
1821 case R_MICROBLAZE_64
:
1822 case R_MICROBLAZE_32_LO
:
1823 /* If this reloc is against a symbol defined in this
1824 section, we must check the addend to see it will put the value in
1825 range to be adjusted, and hence must be changed. */
1826 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
1828 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
1829 /* Only handle relocs against .text. */
1830 if (isym
->st_shndx
== shndx
1831 && ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
)
1832 irel
->r_addend
-= calc_fixup (irel
->r_addend
, 0, sec
);
1835 case R_MICROBLAZE_NONE
:
1837 /* This was a PC-relative instruction that was
1838 completely resolved. */
1840 bfd_vma target_address
;
1841 target_address
= irel
->r_addend
+ irel
->r_offset
;
1842 sfix
= calc_fixup (irel
->r_offset
, 0, sec
);
1843 efix
= calc_fixup (target_address
, 0, sec
);
1844 irel
->r_addend
-= (efix
- sfix
);
1845 /* Should use HOWTO. */
1846 microblaze_bfd_write_imm_value_32 (abfd
, contents
+ irel
->r_offset
,
1850 case R_MICROBLAZE_64_NONE
:
1852 /* This was a PC-relative 64-bit instruction that was
1853 completely resolved. */
1855 bfd_vma target_address
;
1856 target_address
= irel
->r_addend
+ irel
->r_offset
+ INST_WORD_SIZE
;
1857 sfix
= calc_fixup (irel
->r_offset
+ INST_WORD_SIZE
, 0, sec
);
1858 efix
= calc_fixup (target_address
, 0, sec
);
1859 irel
->r_addend
-= (efix
- sfix
);
1860 microblaze_bfd_write_imm_value_32 (abfd
, contents
+ irel
->r_offset
1861 + INST_WORD_SIZE
, irel
->r_addend
);
1865 irel
->r_offset
= nraddr
;
1866 } /* Change all relocs in this section. */
1868 /* Look through all other sections. */
1869 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1871 Elf_Internal_Rela
*irelocs
;
1872 Elf_Internal_Rela
*irelscan
, *irelscanend
;
1873 bfd_byte
*ocontents
;
1876 || (o
->flags
& SEC_RELOC
) == 0
1877 || o
->reloc_count
== 0)
1880 /* We always cache the relocs. Perhaps, if info->keep_memory is
1881 FALSE, we should free them, if we are permitted to. */
1883 irelocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
, TRUE
);
1884 if (irelocs
== NULL
)
1888 irelscanend
= irelocs
+ o
->reloc_count
;
1889 for (irelscan
= irelocs
; irelscan
< irelscanend
; irelscan
++)
1891 if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32
)
1893 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1895 /* Look at the reloc only if the value has been resolved. */
1896 if (isym
->st_shndx
== shndx
1897 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
1899 if (ocontents
== NULL
)
1901 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1902 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1905 /* We always cache the section contents.
1906 Perhaps, if info->keep_memory is FALSE, we
1907 should free them, if we are permitted to. */
1908 if (o
->rawsize
== 0)
1909 o
->rawsize
= o
->size
;
1910 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1911 if (ocontents
== NULL
)
1913 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1917 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1921 irelscan
->r_addend
-= calc_fixup (irelscan
->r_addend
, 0, sec
);
1923 else if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_SYM_OP_SYM
)
1925 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1927 /* Look at the reloc only if the value has been resolved. */
1928 if (ocontents
== NULL
)
1930 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1931 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1934 /* We always cache the section contents.
1935 Perhaps, if info->keep_memory is FALSE, we
1936 should free them, if we are permitted to. */
1938 if (o
->rawsize
== 0)
1939 o
->rawsize
= o
->size
;
1940 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1941 if (ocontents
== NULL
)
1943 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1947 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1950 irelscan
->r_addend
-= calc_fixup (irel
->r_addend
1956 else if ((ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_PCREL_LO
)
1957 || (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_LO
))
1959 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1961 /* Look at the reloc only if the value has been resolved. */
1962 if (isym
->st_shndx
== shndx
1963 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
1966 bfd_vma target_address
;
1968 if (ocontents
== NULL
)
1970 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1971 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1974 /* We always cache the section contents.
1975 Perhaps, if info->keep_memory is FALSE, we
1976 should free them, if we are permitted to. */
1977 if (o
->rawsize
== 0)
1978 o
->rawsize
= o
->size
;
1979 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1980 if (ocontents
== NULL
)
1982 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1986 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1990 unsigned long instr
= bfd_get_32 (abfd
, ocontents
+ irelscan
->r_offset
);
1991 immediate
= instr
& 0x0000ffff;
1992 target_address
= immediate
;
1993 offset
= calc_fixup (target_address
, 0, sec
);
1994 immediate
-= offset
;
1995 irelscan
->r_addend
-= offset
;
1996 microblaze_bfd_write_imm_value_32 (abfd
, ocontents
+ irelscan
->r_offset
,
1997 irelscan
->r_addend
);
2001 if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_64
)
2003 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
2005 /* Look at the reloc only if the value has been resolved. */
2006 if (isym
->st_shndx
== shndx
2007 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
2011 if (ocontents
== NULL
)
2013 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
2014 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
2017 /* We always cache the section contents.
2018 Perhaps, if info->keep_memory is FALSE, we
2019 should free them, if we are permitted to. */
2021 if (o
->rawsize
== 0)
2022 o
->rawsize
= o
->size
;
2023 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
2024 if (ocontents
== NULL
)
2026 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2030 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2033 unsigned long instr_hi
= bfd_get_32 (abfd
, ocontents
2034 + irelscan
->r_offset
);
2035 unsigned long instr_lo
= bfd_get_32 (abfd
, ocontents
2036 + irelscan
->r_offset
2038 immediate
= (instr_hi
& 0x0000ffff) << 16;
2039 immediate
|= (instr_lo
& 0x0000ffff);
2040 offset
= calc_fixup (irelscan
->r_addend
, 0, sec
);
2041 immediate
-= offset
;
2042 irelscan
->r_addend
-= offset
;
2045 else if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_64_PCREL
)
2047 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
2049 /* Look at the reloc only if the value has been resolved. */
2050 if (isym
->st_shndx
== shndx
2051 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
2054 bfd_vma target_address
;
2056 if (ocontents
== NULL
)
2058 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
2059 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
2062 /* We always cache the section contents.
2063 Perhaps, if info->keep_memory is FALSE, we
2064 should free them, if we are permitted to. */
2065 if (o
->rawsize
== 0)
2066 o
->rawsize
= o
->size
;
2067 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
2068 if (ocontents
== NULL
)
2070 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2074 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2077 unsigned long instr_hi
= bfd_get_32 (abfd
, ocontents
2078 + irelscan
->r_offset
);
2079 unsigned long instr_lo
= bfd_get_32 (abfd
, ocontents
2080 + irelscan
->r_offset
2082 immediate
= (instr_hi
& 0x0000ffff) << 16;
2083 immediate
|= (instr_lo
& 0x0000ffff);
2084 target_address
= immediate
;
2085 offset
= calc_fixup (target_address
, 0, sec
);
2086 immediate
-= offset
;
2087 irelscan
->r_addend
-= offset
;
2088 microblaze_bfd_write_imm_value_64 (abfd
, ocontents
2089 + irelscan
->r_offset
, immediate
);
2095 /* Adjust the local symbols defined in this section. */
2096 isymend
= isymbuf
+ symtab_hdr
->sh_info
;
2097 for (isym
= isymbuf
; isym
< isymend
; isym
++)
2099 if (isym
->st_shndx
== shndx
)
2101 isym
->st_value
-= calc_fixup (isym
->st_value
, 0, sec
);
2103 isym
->st_size
-= calc_fixup (isym
->st_value
, isym
->st_size
, sec
);
2107 /* Now adjust the global symbols defined in this section. */
2108 isym
= isymbuf
+ symtab_hdr
->sh_info
;
2109 symcount
= (symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
)) - symtab_hdr
->sh_info
;
2110 for (sym_index
= 0; sym_index
< symcount
; sym_index
++)
2112 sym_hash
= elf_sym_hashes (abfd
)[sym_index
];
2113 if ((sym_hash
->root
.type
== bfd_link_hash_defined
2114 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
2115 && sym_hash
->root
.u
.def
.section
== sec
)
2117 sym_hash
->root
.u
.def
.value
-= calc_fixup (sym_hash
->root
.u
.def
.value
,
2120 sym_hash
->size
-= calc_fixup (sym_hash
->root
.u
.def
.value
,
2121 sym_hash
->size
, sec
);
2125 /* Physically move the code and change the cooked size. */
2126 dest
= sec
->relax
[0].addr
;
2127 for (i
= 0; i
< sec
->relax_count
; i
++)
2130 src
= sec
->relax
[i
].addr
+ sec
->relax
[i
].size
;
2131 len
= sec
->relax
[i
+1].addr
- sec
->relax
[i
].addr
- sec
->relax
[i
].size
;
2133 memmove (contents
+ dest
, contents
+ src
, len
);
2134 sec
->size
-= sec
->relax
[i
].size
;
2138 elf_section_data (sec
)->relocs
= internal_relocs
;
2141 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2142 free_contents
= NULL
;
2144 symtab_hdr
->contents
= (bfd_byte
*) isymbuf
;
2147 if (free_relocs
!= NULL
)
2153 if (free_contents
!= NULL
)
2155 if (!link_info
->keep_memory
)
2156 free (free_contents
);
2158 /* Cache the section contents for elf_link_input_bfd. */
2159 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2160 free_contents
= NULL
;
2163 if (sec
->relax_count
== 0)
2174 if (free_relocs
!= NULL
)
2176 if (free_contents
!= NULL
)
2177 free (free_contents
);
2178 if (sec
->relax
!= NULL
)
2182 sec
->relax_count
= 0;
2187 /* Return the section that should be marked against GC for a given
2191 microblaze_elf_gc_mark_hook (asection
*sec
,
2192 struct bfd_link_info
* info
,
2193 Elf_Internal_Rela
* rel
,
2194 struct elf_link_hash_entry
* h
,
2195 Elf_Internal_Sym
* sym
)
2198 switch (ELF32_R_TYPE (rel
->r_info
))
2200 case R_MICROBLAZE_GNU_VTINHERIT
:
2201 case R_MICROBLAZE_GNU_VTENTRY
:
2205 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2210 #define PLT_ENTRY_SIZE 16
2212 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2213 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2214 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2215 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2216 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2219 update_local_sym_info (bfd
*abfd
,
2220 Elf_Internal_Shdr
*symtab_hdr
,
2221 unsigned long r_symndx
,
2222 unsigned int tls_type
)
2224 bfd_signed_vma
*local_got_refcounts
= elf_local_got_refcounts (abfd
);
2225 unsigned char *local_got_tls_masks
;
2227 if (local_got_refcounts
== NULL
)
2229 bfd_size_type size
= symtab_hdr
->sh_info
;
2231 size
*= (sizeof (*local_got_refcounts
) + sizeof (*local_got_tls_masks
));
2232 local_got_refcounts
= bfd_zalloc (abfd
, size
);
2233 if (local_got_refcounts
== NULL
)
2235 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2238 local_got_tls_masks
=
2239 (unsigned char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2240 local_got_tls_masks
[r_symndx
] |= tls_type
;
2241 local_got_refcounts
[r_symndx
] += 1;
2245 /* Look through the relocs for a section during the first phase. */
2248 microblaze_elf_check_relocs (bfd
* abfd
,
2249 struct bfd_link_info
* info
,
2251 const Elf_Internal_Rela
* relocs
)
2253 Elf_Internal_Shdr
* symtab_hdr
;
2254 struct elf_link_hash_entry
** sym_hashes
;
2255 struct elf_link_hash_entry
** sym_hashes_end
;
2256 const Elf_Internal_Rela
* rel
;
2257 const Elf_Internal_Rela
* rel_end
;
2258 struct elf32_mb_link_hash_table
*htab
;
2259 asection
*sreloc
= NULL
;
2261 if (bfd_link_relocatable (info
))
2264 htab
= elf32_mb_hash_table (info
);
2268 symtab_hdr
= & elf_tdata (abfd
)->symtab_hdr
;
2269 sym_hashes
= elf_sym_hashes (abfd
);
2270 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
2271 if (!elf_bad_symtab (abfd
))
2272 sym_hashes_end
-= symtab_hdr
->sh_info
;
2274 rel_end
= relocs
+ sec
->reloc_count
;
2276 for (rel
= relocs
; rel
< rel_end
; rel
++)
2278 unsigned int r_type
;
2279 struct elf_link_hash_entry
* h
;
2280 unsigned long r_symndx
;
2281 unsigned char tls_type
= 0;
2283 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2284 r_type
= ELF32_R_TYPE (rel
->r_info
);
2286 if (r_symndx
< symtab_hdr
->sh_info
)
2290 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2291 while (h
->root
.type
== bfd_link_hash_indirect
2292 || h
->root
.type
== bfd_link_hash_warning
)
2293 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2298 /* This relocation describes the C++ object vtable hierarchy.
2299 Reconstruct it for later use during GC. */
2300 case R_MICROBLAZE_GNU_VTINHERIT
:
2301 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2305 /* This relocation describes which C++ vtable entries are actually
2306 used. Record for later use during GC. */
2307 case R_MICROBLAZE_GNU_VTENTRY
:
2308 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2312 /* This relocation requires .plt entry. */
2313 case R_MICROBLAZE_PLT_64
:
2317 h
->plt
.refcount
+= 1;
2321 /* This relocation requires .got entry. */
2322 case R_MICROBLAZE_TLSGD
:
2323 tls_type
|= (TLS_TLS
| TLS_GD
);
2325 case R_MICROBLAZE_TLSLD
:
2326 tls_type
|= (TLS_TLS
| TLS_LD
);
2329 sec
->has_tls_reloc
= 1;
2331 case R_MICROBLAZE_GOT_64
:
2332 if (htab
->elf
.sgot
== NULL
)
2334 if (htab
->elf
.dynobj
== NULL
)
2335 htab
->elf
.dynobj
= abfd
;
2336 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
2341 h
->got
.refcount
+= 1;
2342 elf32_mb_hash_entry (h
)->tls_mask
|= tls_type
;
2346 if (! update_local_sym_info(abfd
, symtab_hdr
, r_symndx
, tls_type
) )
2351 case R_MICROBLAZE_GOTOFF_64
:
2352 case R_MICROBLAZE_GOTOFF_32
:
2353 if (htab
->elf
.sgot
== NULL
)
2355 if (htab
->elf
.dynobj
== NULL
)
2356 htab
->elf
.dynobj
= abfd
;
2357 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
2362 case R_MICROBLAZE_64
:
2363 case R_MICROBLAZE_64_PCREL
:
2364 case R_MICROBLAZE_32
:
2366 if (h
!= NULL
&& !bfd_link_pic (info
))
2368 /* we may need a copy reloc. */
2371 /* we may also need a .plt entry. */
2372 h
->plt
.refcount
+= 1;
2373 if (ELF32_R_TYPE (rel
->r_info
) != R_MICROBLAZE_64_PCREL
)
2374 h
->pointer_equality_needed
= 1;
2378 /* If we are creating a shared library, and this is a reloc
2379 against a global symbol, or a non PC relative reloc
2380 against a local symbol, then we need to copy the reloc
2381 into the shared library. However, if we are linking with
2382 -Bsymbolic, we do not need to copy a reloc against a
2383 global symbol which is defined in an object we are
2384 including in the link (i.e., DEF_REGULAR is set). At
2385 this point we have not seen all the input files, so it is
2386 possible that DEF_REGULAR is not set now but will be set
2387 later (it is never cleared). In case of a weak definition,
2388 DEF_REGULAR may be cleared later by a strong definition in
2389 a shared library. We account for that possibility below by
2390 storing information in the relocs_copied field of the hash
2391 table entry. A similar situation occurs when creating
2392 shared libraries and symbol visibility changes render the
2395 If on the other hand, we are creating an executable, we
2396 may need to keep relocations for symbols satisfied by a
2397 dynamic library if we manage to avoid copy relocs for the
2400 if ((bfd_link_pic (info
)
2401 && (sec
->flags
& SEC_ALLOC
) != 0
2402 && (r_type
!= R_MICROBLAZE_64_PCREL
2404 && (! info
->symbolic
2405 || h
->root
.type
== bfd_link_hash_defweak
2406 || !h
->def_regular
))))
2407 || (!bfd_link_pic (info
)
2408 && (sec
->flags
& SEC_ALLOC
) != 0
2410 && (h
->root
.type
== bfd_link_hash_defweak
2411 || !h
->def_regular
)))
2413 struct elf_dyn_relocs
*p
;
2414 struct elf_dyn_relocs
**head
;
2416 /* When creating a shared object, we must copy these
2417 relocs into the output file. We create a reloc
2418 section in dynobj and make room for the reloc. */
2424 if (htab
->elf
.dynobj
== NULL
)
2425 htab
->elf
.dynobj
= abfd
;
2426 dynobj
= htab
->elf
.dynobj
;
2428 sreloc
= _bfd_elf_make_dynamic_reloc_section (sec
, dynobj
,
2434 /* If this is a global symbol, we count the number of
2435 relocations we need for this symbol. */
2437 head
= &((struct elf32_mb_link_hash_entry
*) h
)->dyn_relocs
;
2440 /* Track dynamic relocs needed for local syms too.
2441 We really need local syms available to do this
2445 Elf_Internal_Sym
*isym
;
2448 isym
= bfd_sym_from_r_symndx (&htab
->sym_sec
,
2453 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2457 vpp
= &elf_section_data (s
)->local_dynrel
;
2458 head
= (struct elf_dyn_relocs
**) vpp
;
2462 if (p
== NULL
|| p
->sec
!= sec
)
2464 bfd_size_type amt
= sizeof *p
;
2465 p
= ((struct elf_dyn_relocs
*)
2466 bfd_alloc (htab
->elf
.dynobj
, amt
));
2477 if (r_type
== R_MICROBLAZE_64_PCREL
)
2488 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2491 microblaze_elf_copy_indirect_symbol (struct bfd_link_info
*info
,
2492 struct elf_link_hash_entry
*dir
,
2493 struct elf_link_hash_entry
*ind
)
2495 struct elf32_mb_link_hash_entry
*edir
, *eind
;
2497 edir
= (struct elf32_mb_link_hash_entry
*) dir
;
2498 eind
= (struct elf32_mb_link_hash_entry
*) ind
;
2500 if (eind
->dyn_relocs
!= NULL
)
2502 if (edir
->dyn_relocs
!= NULL
)
2504 struct elf_dyn_relocs
**pp
;
2505 struct elf_dyn_relocs
*p
;
2507 if (ind
->root
.type
== bfd_link_hash_indirect
)
2510 /* Add reloc counts against the weak sym to the strong sym
2511 list. Merge any entries against the same section. */
2512 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
2514 struct elf_dyn_relocs
*q
;
2516 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2517 if (q
->sec
== p
->sec
)
2519 q
->pc_count
+= p
->pc_count
;
2520 q
->count
+= p
->count
;
2527 *pp
= edir
->dyn_relocs
;
2530 edir
->dyn_relocs
= eind
->dyn_relocs
;
2531 eind
->dyn_relocs
= NULL
;
2534 edir
->tls_mask
|= eind
->tls_mask
;
2536 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2539 /* Find dynamic relocs for H that apply to read-only sections. */
2542 readonly_dynrelocs (struct elf_link_hash_entry
*h
)
2544 struct elf_dyn_relocs
*p
;
2546 for (p
= elf32_mb_hash_entry (h
)->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2548 asection
*s
= p
->sec
->output_section
;
2550 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2557 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2558 struct elf_link_hash_entry
*h
)
2560 struct elf32_mb_link_hash_table
*htab
;
2562 unsigned int power_of_two
;
2564 htab
= elf32_mb_hash_table (info
);
2568 /* If this is a function, put it in the procedure linkage table. We
2569 will fill in the contents of the procedure linkage table later,
2570 when we know the address of the .got section. */
2571 if (h
->type
== STT_FUNC
2574 if (h
->plt
.refcount
<= 0
2575 || SYMBOL_CALLS_LOCAL (info
, h
)
2576 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2577 && h
->root
.type
== bfd_link_hash_undefweak
))
2579 /* This case can occur if we saw a PLT reloc in an input
2580 file, but the symbol was never referred to by a dynamic
2581 object, or if all references were garbage collected. In
2582 such a case, we don't actually need to build a procedure
2583 linkage table, and we can just do a PC32 reloc instead. */
2584 h
->plt
.offset
= (bfd_vma
) -1;
2591 /* It's possible that we incorrectly decided a .plt reloc was
2592 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2593 check_relocs. We can't decide accurately between function and
2594 non-function syms in check-relocs; Objects loaded later in
2595 the link may change h->type. So fix it now. */
2596 h
->plt
.offset
= (bfd_vma
) -1;
2598 /* If this is a weak symbol, and there is a real definition, the
2599 processor independent code will have arranged for us to see the
2600 real definition first, and we can just use the same value. */
2601 if (h
->is_weakalias
)
2603 struct elf_link_hash_entry
*def
= weakdef (h
);
2604 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
2605 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
2606 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
2610 /* This is a reference to a symbol defined by a dynamic object which
2611 is not a function. */
2613 /* If we are creating a shared library, we must presume that the
2614 only references to the symbol are via the global offset table.
2615 For such cases we need not do anything here; the relocations will
2616 be handled correctly by relocate_section. */
2617 if (bfd_link_pic (info
))
2620 /* If there are no references to this symbol that do not use the
2621 GOT, we don't need to generate a copy reloc. */
2622 if (!h
->non_got_ref
)
2625 /* If -z nocopyreloc was given, we won't generate them either. */
2626 if (info
->nocopyreloc
)
2632 /* If we don't find any dynamic relocs in read-only sections, then
2633 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2634 if (!readonly_dynrelocs (h
))
2640 /* We must allocate the symbol in our .dynbss section, which will
2641 become part of the .bss section of the executable. There will be
2642 an entry for this symbol in the .dynsym section. The dynamic
2643 object will contain position independent code, so all references
2644 from the dynamic object to this symbol will go through the global
2645 offset table. The dynamic linker will use the .dynsym entry to
2646 determine the address it must put in the global offset table, so
2647 both the dynamic object and the regular object will refer to the
2648 same memory location for the variable. */
2650 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2651 to copy the initial value out of the dynamic object and into the
2652 runtime process image. */
2653 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2655 s
= htab
->elf
.sdynrelro
;
2656 srel
= htab
->elf
.sreldynrelro
;
2660 s
= htab
->elf
.sdynbss
;
2661 srel
= htab
->elf
.srelbss
;
2663 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2665 srel
->size
+= sizeof (Elf32_External_Rela
);
2669 /* We need to figure out the alignment required for this symbol. I
2670 have no idea how ELF linkers handle this. */
2671 power_of_two
= bfd_log2 (h
->size
);
2672 if (power_of_two
> 3)
2675 /* Apply the required alignment. */
2676 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
2677 if (power_of_two
> s
->alignment_power
)
2679 if (!bfd_set_section_alignment (s
->owner
, s
, power_of_two
))
2683 /* Define the symbol as being at this point in the section. */
2684 h
->root
.u
.def
.section
= s
;
2685 h
->root
.u
.def
.value
= s
->size
;
2687 /* Increment the section size to make room for the symbol. */
2692 /* Allocate space in .plt, .got and associated reloc sections for
2696 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * dat
)
2698 struct bfd_link_info
*info
;
2699 struct elf32_mb_link_hash_table
*htab
;
2700 struct elf32_mb_link_hash_entry
*eh
;
2701 struct elf_dyn_relocs
*p
;
2703 if (h
->root
.type
== bfd_link_hash_indirect
)
2706 info
= (struct bfd_link_info
*) dat
;
2707 htab
= elf32_mb_hash_table (info
);
2711 if (htab
->elf
.dynamic_sections_created
2712 && h
->plt
.refcount
> 0)
2714 /* Make sure this symbol is output as a dynamic symbol.
2715 Undefined weak syms won't yet be marked as dynamic. */
2716 if (h
->dynindx
== -1
2717 && !h
->forced_local
)
2719 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2723 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), h
))
2725 asection
*s
= htab
->elf
.splt
;
2727 /* The first entry in .plt is reserved. */
2729 s
->size
= PLT_ENTRY_SIZE
;
2731 h
->plt
.offset
= s
->size
;
2733 /* If this symbol is not defined in a regular file, and we are
2734 not generating a shared library, then set the symbol to this
2735 location in the .plt. This is required to make function
2736 pointers compare as equal between the normal executable and
2737 the shared library. */
2738 if (! bfd_link_pic (info
)
2741 h
->root
.u
.def
.section
= s
;
2742 h
->root
.u
.def
.value
= h
->plt
.offset
;
2745 /* Make room for this entry. */
2746 s
->size
+= PLT_ENTRY_SIZE
;
2748 /* We also need to make an entry in the .got.plt section, which
2749 will be placed in the .got section by the linker script. */
2750 htab
->elf
.sgotplt
->size
+= 4;
2752 /* We also need to make an entry in the .rel.plt section. */
2753 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rela
);
2757 h
->plt
.offset
= (bfd_vma
) -1;
2763 h
->plt
.offset
= (bfd_vma
) -1;
2767 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2768 if (h
->got
.refcount
> 0)
2773 /* Make sure this symbol is output as a dynamic symbol.
2774 Undefined weak syms won't yet be marked as dynamic. */
2775 if (h
->dynindx
== -1
2776 && !h
->forced_local
)
2778 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2783 if ((eh
->tls_mask
& TLS_TLS
) != 0)
2785 /* Handle TLS Symbol */
2786 if ((eh
->tls_mask
& TLS_LD
) != 0)
2788 if (!eh
->elf
.def_dynamic
)
2789 /* We'll just use htab->tlsld_got.offset. This should
2790 always be the case. It's a little odd if we have
2791 a local dynamic reloc against a non-local symbol. */
2792 htab
->tlsld_got
.refcount
+= 1;
2796 if ((eh
->tls_mask
& TLS_GD
) != 0)
2801 /* Regular (non-TLS) symbol */
2806 h
->got
.offset
= (bfd_vma
) -1;
2811 h
->got
.offset
= s
->size
;
2813 htab
->elf
.srelgot
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
2817 h
->got
.offset
= (bfd_vma
) -1;
2819 if (eh
->dyn_relocs
== NULL
)
2822 /* In the shared -Bsymbolic case, discard space allocated for
2823 dynamic pc-relative relocs against symbols which turn out to be
2824 defined in regular objects. For the normal shared case, discard
2825 space for pc-relative relocs that have become local due to symbol
2826 visibility changes. */
2828 if (bfd_link_pic (info
))
2834 struct elf_dyn_relocs
**pp
;
2836 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2838 p
->count
-= p
->pc_count
;
2846 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
2847 eh
->dyn_relocs
= NULL
;
2851 /* For the non-shared case, discard space for relocs against
2852 symbols which turn out to need copy relocs or are not
2858 || (htab
->elf
.dynamic_sections_created
2859 && (h
->root
.type
== bfd_link_hash_undefweak
2860 || h
->root
.type
== bfd_link_hash_undefined
))))
2862 /* Make sure this symbol is output as a dynamic symbol.
2863 Undefined weak syms won't yet be marked as dynamic. */
2864 if (h
->dynindx
== -1
2865 && !h
->forced_local
)
2867 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2871 /* If that succeeded, we know we'll be keeping all the
2873 if (h
->dynindx
!= -1)
2877 eh
->dyn_relocs
= NULL
;
2882 /* Finally, allocate space. */
2883 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2885 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
2886 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2892 /* Set the sizes of the dynamic sections. */
2895 microblaze_elf_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2896 struct bfd_link_info
*info
)
2898 struct elf32_mb_link_hash_table
*htab
;
2903 htab
= elf32_mb_hash_table (info
);
2907 dynobj
= htab
->elf
.dynobj
;
2908 BFD_ASSERT (dynobj
!= NULL
);
2910 /* Set up .got offsets for local syms, and space for local dynamic
2912 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2914 bfd_signed_vma
*local_got
;
2915 bfd_signed_vma
*end_local_got
;
2916 bfd_size_type locsymcount
;
2917 Elf_Internal_Shdr
*symtab_hdr
;
2918 unsigned char *lgot_masks
;
2921 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2924 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2926 struct elf_dyn_relocs
*p
;
2928 for (p
= ((struct elf_dyn_relocs
*)
2929 elf_section_data (s
)->local_dynrel
);
2933 if (!bfd_is_abs_section (p
->sec
)
2934 && bfd_is_abs_section (p
->sec
->output_section
))
2936 /* Input section has been discarded, either because
2937 it is a copy of a linkonce section or due to
2938 linker script /DISCARD/, so we'll be discarding
2941 else if (p
->count
!= 0)
2943 srel
= elf_section_data (p
->sec
)->sreloc
;
2944 srel
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2945 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2946 info
->flags
|= DF_TEXTREL
;
2951 local_got
= elf_local_got_refcounts (ibfd
);
2955 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2956 locsymcount
= symtab_hdr
->sh_info
;
2957 end_local_got
= local_got
+ locsymcount
;
2958 lgot_masks
= (unsigned char *) end_local_got
;
2960 srel
= htab
->elf
.srelgot
;
2962 for (; local_got
< end_local_got
; ++local_got
, ++lgot_masks
)
2966 unsigned int need
= 0;
2967 if ((*lgot_masks
& TLS_TLS
) != 0)
2969 if ((*lgot_masks
& TLS_GD
) != 0)
2971 if ((*lgot_masks
& TLS_LD
) != 0)
2972 htab
->tlsld_got
.refcount
+= 1;
2979 *local_got
= (bfd_vma
) -1;
2983 *local_got
= s
->size
;
2985 if (bfd_link_pic (info
))
2986 srel
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
2990 *local_got
= (bfd_vma
) -1;
2994 /* Allocate global sym .plt and .got entries, and space for global
2995 sym dynamic relocs. */
2996 elf_link_hash_traverse (elf_hash_table (info
), allocate_dynrelocs
, info
);
2998 if (htab
->tlsld_got
.refcount
> 0)
3000 htab
->tlsld_got
.offset
= htab
->elf
.sgot
->size
;
3001 htab
->elf
.sgot
->size
+= 8;
3002 if (bfd_link_pic (info
))
3003 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
3006 htab
->tlsld_got
.offset
= (bfd_vma
) -1;
3008 if (elf_hash_table (info
)->dynamic_sections_created
)
3010 /* Make space for the trailing nop in .plt. */
3011 if (htab
->elf
.splt
->size
> 0)
3012 htab
->elf
.splt
->size
+= 4;
3015 /* The check_relocs and adjust_dynamic_symbol entry points have
3016 determined the sizes of the various dynamic sections. Allocate
3018 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3021 bfd_boolean strip
= FALSE
;
3023 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3026 /* It's OK to base decisions on the section name, because none
3027 of the dynobj section names depend upon the input files. */
3028 name
= bfd_get_section_name (dynobj
, s
);
3030 if (strncmp (name
, ".rela", 5) == 0)
3034 /* If we don't need this section, strip it from the
3035 output file. This is to handle .rela.bss and
3036 .rela.plt. We must create it in
3037 create_dynamic_sections, because it must be created
3038 before the linker maps input sections to output
3039 sections. The linker does that before
3040 adjust_dynamic_symbol is called, and it is that
3041 function which decides whether anything needs to go
3042 into these sections. */
3047 /* We use the reloc_count field as a counter if we need
3048 to copy relocs into the output file. */
3052 else if (s
!= htab
->elf
.splt
3053 && s
!= htab
->elf
.sgot
3054 && s
!= htab
->elf
.sgotplt
3055 && s
!= htab
->elf
.sdynbss
3056 && s
!= htab
->elf
.sdynrelro
)
3058 /* It's not one of our sections, so don't allocate space. */
3064 s
->flags
|= SEC_EXCLUDE
;
3068 /* Allocate memory for the section contents. */
3069 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3070 Unused entries should be reclaimed before the section's contents
3071 are written out, but at the moment this does not happen. Thus in
3072 order to prevent writing out garbage, we initialise the section's
3073 contents to zero. */
3074 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3075 if (s
->contents
== NULL
&& s
->size
!= 0)
3079 if (elf_hash_table (info
)->dynamic_sections_created
)
3081 /* Add some entries to the .dynamic section. We fill in the
3082 values later, in microblaze_elf_finish_dynamic_sections, but we
3083 must add the entries now so that we get the correct size for
3084 the .dynamic section. The DT_DEBUG entry is filled in by the
3085 dynamic linker and used by the debugger. */
3086 #define add_dynamic_entry(TAG, VAL) \
3087 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3089 if (bfd_link_executable (info
))
3091 if (!add_dynamic_entry (DT_DEBUG
, 0))
3095 if (!add_dynamic_entry (DT_RELA
, 0)
3096 || !add_dynamic_entry (DT_RELASZ
, 0)
3097 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3100 if (htab
->elf
.splt
->size
!= 0)
3102 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3103 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3104 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3105 || !add_dynamic_entry (DT_JMPREL
, 0)
3106 || !add_dynamic_entry (DT_BIND_NOW
, 1))
3110 if (info
->flags
& DF_TEXTREL
)
3112 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3116 #undef add_dynamic_entry
3120 /* Finish up dynamic symbol handling. We set the contents of various
3121 dynamic sections here. */
3124 microblaze_elf_finish_dynamic_symbol (bfd
*output_bfd
,
3125 struct bfd_link_info
*info
,
3126 struct elf_link_hash_entry
*h
,
3127 Elf_Internal_Sym
*sym
)
3129 struct elf32_mb_link_hash_table
*htab
;
3130 struct elf32_mb_link_hash_entry
*eh
= elf32_mb_hash_entry(h
);
3132 htab
= elf32_mb_hash_table (info
);
3136 if (h
->plt
.offset
!= (bfd_vma
) -1)
3141 Elf_Internal_Rela rela
;
3147 /* This symbol has an entry in the procedure linkage table. Set
3149 BFD_ASSERT (h
->dynindx
!= -1);
3151 splt
= htab
->elf
.splt
;
3152 srela
= htab
->elf
.srelplt
;
3153 sgotplt
= htab
->elf
.sgotplt
;
3154 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
&& sgotplt
!= NULL
);
3156 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1; /* first entry reserved. */
3157 got_offset
= (plt_index
+ 3) * 4; /* 3 reserved ??? */
3158 got_addr
= got_offset
;
3160 /* For non-PIC objects we need absolute address of the GOT entry. */
3161 if (!bfd_link_pic (info
))
3162 got_addr
+= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
3164 /* Fill in the entry in the procedure linkage table. */
3165 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_0
+ ((got_addr
>> 16) & 0xffff),
3166 splt
->contents
+ h
->plt
.offset
);
3167 if (bfd_link_pic (info
))
3168 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1
+ (got_addr
& 0xffff),
3169 splt
->contents
+ h
->plt
.offset
+ 4);
3171 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1_NOPIC
+ (got_addr
& 0xffff),
3172 splt
->contents
+ h
->plt
.offset
+ 4);
3173 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_2
,
3174 splt
->contents
+ h
->plt
.offset
+ 8);
3175 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_3
,
3176 splt
->contents
+ h
->plt
.offset
+ 12);
3178 /* Any additions to the .got section??? */
3179 /* bfd_put_32 (output_bfd,
3180 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3181 sgotplt->contents + got_offset); */
3183 /* Fill in the entry in the .rela.plt section. */
3184 rela
.r_offset
= (sgotplt
->output_section
->vma
3185 + sgotplt
->output_offset
3187 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_JUMP_SLOT
);
3189 loc
= srela
->contents
;
3190 loc
+= plt_index
* sizeof (Elf32_External_Rela
);
3191 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3193 if (!h
->def_regular
)
3195 /* Mark the symbol as undefined, rather than as defined in
3196 the .plt section. Zero the value. */
3197 sym
->st_shndx
= SHN_UNDEF
;
3202 /* h->got.refcount to be checked ? */
3203 if (h
->got
.offset
!= (bfd_vma
) -1 &&
3204 ! ((h
->got
.offset
& 1) ||
3205 IS_TLS_LD(eh
->tls_mask
) || IS_TLS_GD(eh
->tls_mask
)))
3211 /* This symbol has an entry in the global offset table. Set it
3214 sgot
= htab
->elf
.sgot
;
3215 srela
= htab
->elf
.srelgot
;
3216 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
3218 offset
= (sgot
->output_section
->vma
+ sgot
->output_offset
3219 + (h
->got
.offset
&~ (bfd_vma
) 1));
3221 /* If this is a -Bsymbolic link, and the symbol is defined
3222 locally, we just want to emit a RELATIVE reloc. Likewise if
3223 the symbol was forced to be local because of a version file.
3224 The entry in the global offset table will already have been
3225 initialized in the relocate_section function. */
3226 if (bfd_link_pic (info
)
3227 && ((info
->symbolic
&& h
->def_regular
)
3228 || h
->dynindx
== -1))
3230 asection
*sec
= h
->root
.u
.def
.section
;
3233 value
= h
->root
.u
.def
.value
;
3234 if (sec
->output_section
!= NULL
)
3235 /* PR 21180: If the output section is NULL, then the symbol is no
3236 longer needed, and in theory the GOT entry is redundant. But
3237 it is too late to change our minds now... */
3238 value
+= sec
->output_section
->vma
+ sec
->output_offset
;
3240 microblaze_elf_output_dynamic_relocation (output_bfd
,
3241 srela
, srela
->reloc_count
++,
3243 R_MICROBLAZE_REL
, offset
,
3248 microblaze_elf_output_dynamic_relocation (output_bfd
,
3249 srela
, srela
->reloc_count
++,
3251 R_MICROBLAZE_GLOB_DAT
,
3255 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3256 sgot
->contents
+ (h
->got
.offset
&~ (bfd_vma
) 1));
3262 Elf_Internal_Rela rela
;
3265 /* This symbols needs a copy reloc. Set it up. */
3267 BFD_ASSERT (h
->dynindx
!= -1);
3269 rela
.r_offset
= (h
->root
.u
.def
.value
3270 + h
->root
.u
.def
.section
->output_section
->vma
3271 + h
->root
.u
.def
.section
->output_offset
);
3272 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_COPY
);
3274 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
3275 s
= htab
->elf
.sreldynrelro
;
3277 s
= htab
->elf
.srelbss
;
3278 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3279 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3282 /* Mark some specially defined symbols as absolute. */
3283 if (h
== htab
->elf
.hdynamic
3284 || h
== htab
->elf
.hgot
3285 || h
== htab
->elf
.hplt
)
3286 sym
->st_shndx
= SHN_ABS
;
3292 /* Finish up the dynamic sections. */
3295 microblaze_elf_finish_dynamic_sections (bfd
*output_bfd
,
3296 struct bfd_link_info
*info
)
3299 asection
*sdyn
, *sgot
;
3300 struct elf32_mb_link_hash_table
*htab
;
3302 htab
= elf32_mb_hash_table (info
);
3306 dynobj
= htab
->elf
.dynobj
;
3308 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3310 if (htab
->elf
.dynamic_sections_created
)
3313 Elf32_External_Dyn
*dyncon
, *dynconend
;
3315 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3316 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3317 for (; dyncon
< dynconend
; dyncon
++)
3319 Elf_Internal_Dyn dyn
;
3323 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3328 s
= htab
->elf
.sgotplt
;
3333 s
= htab
->elf
.srelplt
;
3338 s
= htab
->elf
.srelplt
;
3351 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3353 dyn
.d_un
.d_val
= s
->size
;
3355 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3358 splt
= htab
->elf
.splt
;
3359 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
3361 /* Clear the first entry in the procedure linkage table,
3362 and put a nop in the last four bytes. */
3365 memset (splt
->contents
, 0, PLT_ENTRY_SIZE
);
3366 bfd_put_32 (output_bfd
, (bfd_vma
) 0x80000000 /* nop. */,
3367 splt
->contents
+ splt
->size
- 4);
3370 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
3373 /* Set the first entry in the global offset table to the address of
3374 the dynamic section. */
3375 sgot
= htab
->elf
.sgotplt
;
3376 if (sgot
&& sgot
->size
> 0)
3379 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
3381 bfd_put_32 (output_bfd
,
3382 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
3384 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3387 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
3388 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3393 /* Hook called by the linker routine which adds symbols from an object
3394 file. We use it to put .comm items in .sbss, and not .bss. */
3397 microblaze_elf_add_symbol_hook (bfd
*abfd
,
3398 struct bfd_link_info
*info
,
3399 Elf_Internal_Sym
*sym
,
3400 const char **namep ATTRIBUTE_UNUSED
,
3401 flagword
*flagsp ATTRIBUTE_UNUSED
,
3405 if (sym
->st_shndx
== SHN_COMMON
3406 && !bfd_link_relocatable (info
)
3407 && sym
->st_size
<= elf_gp_size (abfd
))
3409 /* Common symbols less than or equal to -G nn bytes are automatically
3411 *secp
= bfd_make_section_old_way (abfd
, ".sbss");
3413 || ! bfd_set_section_flags (abfd
, *secp
, SEC_IS_COMMON
))
3416 *valp
= sym
->st_size
;
3422 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec
3423 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3425 #define TARGET_BIG_SYM microblaze_elf32_vec
3426 #define TARGET_BIG_NAME "elf32-microblaze"
3428 #define ELF_ARCH bfd_arch_microblaze
3429 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3430 #define ELF_MACHINE_CODE EM_MICROBLAZE
3431 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3432 #define ELF_MAXPAGESIZE 0x1000
3433 #define elf_info_to_howto microblaze_elf_info_to_howto
3434 #define elf_info_to_howto_rel NULL
3436 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3437 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3438 #define elf_backend_relocate_section microblaze_elf_relocate_section
3439 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3440 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
3441 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3443 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3444 #define elf_backend_check_relocs microblaze_elf_check_relocs
3445 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3446 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3447 #define elf_backend_can_gc_sections 1
3448 #define elf_backend_can_refcount 1
3449 #define elf_backend_want_got_plt 1
3450 #define elf_backend_plt_readonly 1
3451 #define elf_backend_got_header_size 12
3452 #define elf_backend_want_dynrelro 1
3453 #define elf_backend_rela_normal 1
3454 #define elf_backend_dtrel_excludes_plt 1
3456 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3457 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3458 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3459 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3460 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3461 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3463 #include "elf32-target.h"