1 /* Xilinx MicroBlaze-specific support for 32-bit ELF
3 Copyright (C) 2009-2016 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
30 #include "elf/microblaze.h"
33 #define USE_RELA /* Only USE_REL is actually significant, but this is
34 here are a reminder... */
35 #define INST_WORD_SIZE 4
37 static int ro_small_data_pointer
= 0;
38 static int rw_small_data_pointer
= 0;
40 static reloc_howto_type
* microblaze_elf_howto_table
[(int) R_MICROBLAZE_max
];
42 static reloc_howto_type microblaze_elf_howto_raw
[] =
44 /* This reloc does nothing. */
45 HOWTO (R_MICROBLAZE_NONE
, /* Type. */
47 3, /* Size (0 = byte, 1 = short, 2 = long). */
49 FALSE
, /* PC_relative. */
51 complain_overflow_dont
, /* Complain on overflow. */
52 NULL
, /* Special Function. */
53 "R_MICROBLAZE_NONE", /* Name. */
54 FALSE
, /* Partial Inplace. */
57 FALSE
), /* PC relative offset? */
59 /* A standard 32 bit relocation. */
60 HOWTO (R_MICROBLAZE_32
, /* Type. */
62 2, /* Size (0 = byte, 1 = short, 2 = long). */
64 FALSE
, /* PC_relative. */
66 complain_overflow_bitfield
, /* Complain on overflow. */
67 bfd_elf_generic_reloc
,/* Special Function. */
68 "R_MICROBLAZE_32", /* Name. */
69 FALSE
, /* Partial Inplace. */
71 0xffffffff, /* Dest Mask. */
72 FALSE
), /* PC relative offset? */
74 /* A standard PCREL 32 bit relocation. */
75 HOWTO (R_MICROBLAZE_32_PCREL
,/* Type. */
77 2, /* Size (0 = byte, 1 = short, 2 = long). */
79 TRUE
, /* PC_relative. */
81 complain_overflow_bitfield
, /* Complain on overflow. */
82 bfd_elf_generic_reloc
,/* Special Function. */
83 "R_MICROBLAZE_32_PCREL", /* Name. */
84 TRUE
, /* Partial Inplace. */
86 0xffffffff, /* Dest Mask. */
87 TRUE
), /* PC relative offset? */
89 /* A 64 bit PCREL relocation. Table-entry not really used. */
90 HOWTO (R_MICROBLAZE_64_PCREL
,/* Type. */
92 2, /* Size (0 = byte, 1 = short, 2 = long). */
94 TRUE
, /* PC_relative. */
96 complain_overflow_dont
, /* Complain on overflow. */
97 bfd_elf_generic_reloc
,/* Special Function. */
98 "R_MICROBLAZE_64_PCREL", /* Name. */
99 FALSE
, /* Partial Inplace. */
100 0, /* Source Mask. */
101 0x0000ffff, /* Dest Mask. */
102 TRUE
), /* PC relative offset? */
104 /* The low half of a PCREL 32 bit relocation. */
105 HOWTO (R_MICROBLAZE_32_PCREL_LO
, /* Type. */
107 2, /* Size (0 = byte, 1 = short, 2 = long). */
109 TRUE
, /* PC_relative. */
111 complain_overflow_signed
, /* Complain on overflow. */
112 bfd_elf_generic_reloc
, /* Special Function. */
113 "R_MICROBLAZE_32_PCREL_LO", /* Name. */
114 FALSE
, /* Partial Inplace. */
115 0, /* Source Mask. */
116 0x0000ffff, /* Dest Mask. */
117 TRUE
), /* PC relative offset? */
119 /* A 64 bit relocation. Table entry not really used. */
120 HOWTO (R_MICROBLAZE_64
, /* Type. */
122 2, /* Size (0 = byte, 1 = short, 2 = long). */
124 FALSE
, /* PC_relative. */
126 complain_overflow_dont
, /* Complain on overflow. */
127 bfd_elf_generic_reloc
,/* Special Function. */
128 "R_MICROBLAZE_64", /* Name. */
129 FALSE
, /* Partial Inplace. */
130 0, /* Source Mask. */
131 0x0000ffff, /* Dest Mask. */
132 FALSE
), /* PC relative offset? */
134 /* The low half of a 32 bit relocation. */
135 HOWTO (R_MICROBLAZE_32_LO
, /* Type. */
137 2, /* Size (0 = byte, 1 = short, 2 = long). */
139 FALSE
, /* PC_relative. */
141 complain_overflow_signed
, /* Complain on overflow. */
142 bfd_elf_generic_reloc
,/* Special Function. */
143 "R_MICROBLAZE_32_LO", /* Name. */
144 FALSE
, /* Partial Inplace. */
145 0, /* Source Mask. */
146 0x0000ffff, /* Dest Mask. */
147 FALSE
), /* PC relative offset? */
149 /* Read-only small data section relocation. */
150 HOWTO (R_MICROBLAZE_SRO32
, /* Type. */
152 2, /* Size (0 = byte, 1 = short, 2 = long). */
154 FALSE
, /* PC_relative. */
156 complain_overflow_bitfield
, /* Complain on overflow. */
157 bfd_elf_generic_reloc
,/* Special Function. */
158 "R_MICROBLAZE_SRO32", /* Name. */
159 FALSE
, /* Partial Inplace. */
160 0, /* Source Mask. */
161 0x0000ffff, /* Dest Mask. */
162 FALSE
), /* PC relative offset? */
164 /* Read-write small data area relocation. */
165 HOWTO (R_MICROBLAZE_SRW32
, /* Type. */
167 2, /* Size (0 = byte, 1 = short, 2 = long). */
169 FALSE
, /* PC_relative. */
171 complain_overflow_bitfield
, /* Complain on overflow. */
172 bfd_elf_generic_reloc
,/* Special Function. */
173 "R_MICROBLAZE_SRW32", /* Name. */
174 FALSE
, /* Partial Inplace. */
175 0, /* Source Mask. */
176 0x0000ffff, /* Dest Mask. */
177 FALSE
), /* PC relative offset? */
179 /* This reloc does nothing. Used for relaxation. */
180 HOWTO (R_MICROBLAZE_64_NONE
, /* Type. */
182 3, /* Size (0 = byte, 1 = short, 2 = long). */
184 TRUE
, /* PC_relative. */
186 complain_overflow_dont
, /* Complain on overflow. */
187 NULL
, /* Special Function. */
188 "R_MICROBLAZE_64_NONE",/* Name. */
189 FALSE
, /* Partial Inplace. */
190 0, /* Source Mask. */
192 FALSE
), /* PC relative offset? */
194 /* Symbol Op Symbol relocation. */
195 HOWTO (R_MICROBLAZE_32_SYM_OP_SYM
, /* Type. */
197 2, /* Size (0 = byte, 1 = short, 2 = long). */
199 FALSE
, /* PC_relative. */
201 complain_overflow_bitfield
, /* Complain on overflow. */
202 bfd_elf_generic_reloc
,/* Special Function. */
203 "R_MICROBLAZE_32_SYM_OP_SYM", /* Name. */
204 FALSE
, /* Partial Inplace. */
205 0, /* Source Mask. */
206 0xffffffff, /* Dest Mask. */
207 FALSE
), /* PC relative offset? */
209 /* GNU extension to record C++ vtable hierarchy. */
210 HOWTO (R_MICROBLAZE_GNU_VTINHERIT
, /* Type. */
212 2, /* Size (0 = byte, 1 = short, 2 = long). */
214 FALSE
, /* PC_relative. */
216 complain_overflow_dont
,/* Complain on overflow. */
217 NULL
, /* Special Function. */
218 "R_MICROBLAZE_GNU_VTINHERIT", /* Name. */
219 FALSE
, /* Partial Inplace. */
220 0, /* Source Mask. */
222 FALSE
), /* PC relative offset? */
224 /* GNU extension to record C++ vtable member usage. */
225 HOWTO (R_MICROBLAZE_GNU_VTENTRY
, /* Type. */
227 2, /* Size (0 = byte, 1 = short, 2 = long). */
229 FALSE
, /* PC_relative. */
231 complain_overflow_dont
,/* Complain on overflow. */
232 _bfd_elf_rel_vtable_reloc_fn
, /* Special Function. */
233 "R_MICROBLAZE_GNU_VTENTRY", /* Name. */
234 FALSE
, /* Partial Inplace. */
235 0, /* Source Mask. */
237 FALSE
), /* PC relative offset? */
239 /* A 64 bit GOTPC relocation. Table-entry not really used. */
240 HOWTO (R_MICROBLAZE_GOTPC_64
, /* Type. */
242 2, /* Size (0 = byte, 1 = short, 2 = long). */
244 TRUE
, /* PC_relative. */
246 complain_overflow_dont
, /* Complain on overflow. */
247 bfd_elf_generic_reloc
, /* Special Function. */
248 "R_MICROBLAZE_GOTPC_64", /* Name. */
249 FALSE
, /* Partial Inplace. */
250 0, /* Source Mask. */
251 0x0000ffff, /* Dest Mask. */
252 TRUE
), /* PC relative offset? */
254 /* A 64 bit GOT relocation. Table-entry not really used. */
255 HOWTO (R_MICROBLAZE_GOT_64
, /* Type. */
257 2, /* Size (0 = byte, 1 = short, 2 = long). */
259 FALSE
, /* PC_relative. */
261 complain_overflow_dont
, /* Complain on overflow. */
262 bfd_elf_generic_reloc
,/* Special Function. */
263 "R_MICROBLAZE_GOT_64",/* Name. */
264 FALSE
, /* Partial Inplace. */
265 0, /* Source Mask. */
266 0x0000ffff, /* Dest Mask. */
267 FALSE
), /* PC relative offset? */
269 /* A 64 bit PLT relocation. Table-entry not really used. */
270 HOWTO (R_MICROBLAZE_PLT_64
, /* Type. */
272 2, /* Size (0 = byte, 1 = short, 2 = long). */
274 TRUE
, /* PC_relative. */
276 complain_overflow_dont
, /* Complain on overflow. */
277 bfd_elf_generic_reloc
,/* Special Function. */
278 "R_MICROBLAZE_PLT_64",/* Name. */
279 FALSE
, /* Partial Inplace. */
280 0, /* Source Mask. */
281 0x0000ffff, /* Dest Mask. */
282 TRUE
), /* PC relative offset? */
284 /* Table-entry not really used. */
285 HOWTO (R_MICROBLAZE_REL
, /* Type. */
287 2, /* Size (0 = byte, 1 = short, 2 = long). */
289 TRUE
, /* PC_relative. */
291 complain_overflow_dont
, /* Complain on overflow. */
292 bfd_elf_generic_reloc
,/* Special Function. */
293 "R_MICROBLAZE_REL", /* Name. */
294 FALSE
, /* Partial Inplace. */
295 0, /* Source Mask. */
296 0x0000ffff, /* Dest Mask. */
297 TRUE
), /* PC relative offset? */
299 /* Table-entry not really used. */
300 HOWTO (R_MICROBLAZE_JUMP_SLOT
,/* Type. */
302 2, /* Size (0 = byte, 1 = short, 2 = long). */
304 TRUE
, /* PC_relative. */
306 complain_overflow_dont
, /* Complain on overflow. */
307 bfd_elf_generic_reloc
,/* Special Function. */
308 "R_MICROBLAZE_JUMP_SLOT", /* Name. */
309 FALSE
, /* Partial Inplace. */
310 0, /* Source Mask. */
311 0x0000ffff, /* Dest Mask. */
312 TRUE
), /* PC relative offset? */
314 /* Table-entry not really used. */
315 HOWTO (R_MICROBLAZE_GLOB_DAT
,/* Type. */
317 2, /* Size (0 = byte, 1 = short, 2 = long). */
319 TRUE
, /* PC_relative. */
321 complain_overflow_dont
, /* Complain on overflow. */
322 bfd_elf_generic_reloc
,/* Special Function. */
323 "R_MICROBLAZE_GLOB_DAT", /* Name. */
324 FALSE
, /* Partial Inplace. */
325 0, /* Source Mask. */
326 0x0000ffff, /* Dest Mask. */
327 TRUE
), /* PC relative offset? */
329 /* A 64 bit GOT relative relocation. Table-entry not really used. */
330 HOWTO (R_MICROBLAZE_GOTOFF_64
, /* Type. */
332 2, /* Size (0 = byte, 1 = short, 2 = long). */
334 FALSE
, /* PC_relative. */
336 complain_overflow_dont
, /* Complain on overflow. */
337 bfd_elf_generic_reloc
,/* Special Function. */
338 "R_MICROBLAZE_GOTOFF_64", /* Name. */
339 FALSE
, /* Partial Inplace. */
340 0, /* Source Mask. */
341 0x0000ffff, /* Dest Mask. */
342 FALSE
), /* PC relative offset? */
344 /* A 32 bit GOT relative relocation. Table-entry not really used. */
345 HOWTO (R_MICROBLAZE_GOTOFF_32
, /* Type. */
347 2, /* Size (0 = byte, 1 = short, 2 = long). */
349 FALSE
, /* PC_relative. */
351 complain_overflow_dont
, /* Complain on overflow. */
352 bfd_elf_generic_reloc
, /* Special Function. */
353 "R_MICROBLAZE_GOTOFF_32", /* Name. */
354 FALSE
, /* Partial Inplace. */
355 0, /* Source Mask. */
356 0x0000ffff, /* Dest Mask. */
357 FALSE
), /* PC relative offset? */
359 /* COPY relocation. Table-entry not really used. */
360 HOWTO (R_MICROBLAZE_COPY
, /* Type. */
362 2, /* Size (0 = byte, 1 = short, 2 = long). */
364 FALSE
, /* PC_relative. */
366 complain_overflow_dont
, /* Complain on overflow. */
367 bfd_elf_generic_reloc
,/* Special Function. */
368 "R_MICROBLAZE_COPY", /* Name. */
369 FALSE
, /* Partial Inplace. */
370 0, /* Source Mask. */
371 0x0000ffff, /* Dest Mask. */
372 FALSE
), /* PC relative offset? */
374 /* Marker relocs for TLS. */
375 HOWTO (R_MICROBLAZE_TLS
,
377 2, /* size (0 = byte, 1 = short, 2 = long) */
379 FALSE
, /* pc_relative */
381 complain_overflow_dont
, /* complain_on_overflow */
382 bfd_elf_generic_reloc
, /* special_function */
383 "R_MICROBLAZE_TLS", /* name */
384 FALSE
, /* partial_inplace */
386 0x0000ffff, /* dst_mask */
387 FALSE
), /* pcrel_offset */
389 HOWTO (R_MICROBLAZE_TLSGD
,
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_dont
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 "R_MICROBLAZE_TLSGD", /* name */
398 FALSE
, /* partial_inplace */
400 0x0000ffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
403 HOWTO (R_MICROBLAZE_TLSLD
,
405 2, /* size (0 = byte, 1 = short, 2 = long) */
407 FALSE
, /* pc_relative */
409 complain_overflow_dont
, /* complain_on_overflow */
410 bfd_elf_generic_reloc
, /* special_function */
411 "R_MICROBLAZE_TLSLD", /* name */
412 FALSE
, /* partial_inplace */
414 0x0000ffff, /* dst_mask */
415 FALSE
), /* pcrel_offset */
417 /* Computes the load module index of the load module that contains the
418 definition of its TLS sym. */
419 HOWTO (R_MICROBLAZE_TLSDTPMOD32
,
421 2, /* size (0 = byte, 1 = short, 2 = long) */
423 FALSE
, /* pc_relative */
425 complain_overflow_dont
, /* complain_on_overflow */
426 bfd_elf_generic_reloc
, /* special_function */
427 "R_MICROBLAZE_TLSDTPMOD32", /* name */
428 FALSE
, /* partial_inplace */
430 0x0000ffff, /* dst_mask */
431 FALSE
), /* pcrel_offset */
433 /* Computes a dtv-relative displacement, the difference between the value
434 of sym+add and the base address of the thread-local storage block that
435 contains the definition of sym, minus 0x8000. Used for initializing GOT */
436 HOWTO (R_MICROBLAZE_TLSDTPREL32
,
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 FALSE
, /* pc_relative */
442 complain_overflow_dont
, /* complain_on_overflow */
443 bfd_elf_generic_reloc
, /* special_function */
444 "R_MICROBLAZE_TLSDTPREL32", /* name */
445 FALSE
, /* partial_inplace */
447 0x0000ffff, /* dst_mask */
448 FALSE
), /* pcrel_offset */
450 /* Computes a dtv-relative displacement, the difference between the value
451 of sym+add and the base address of the thread-local storage block that
452 contains the definition of sym, minus 0x8000. */
453 HOWTO (R_MICROBLAZE_TLSDTPREL64
,
455 2, /* size (0 = byte, 1 = short, 2 = long) */
457 FALSE
, /* pc_relative */
459 complain_overflow_dont
, /* complain_on_overflow */
460 bfd_elf_generic_reloc
, /* special_function */
461 "R_MICROBLAZE_TLSDTPREL64", /* name */
462 FALSE
, /* partial_inplace */
464 0x0000ffff, /* dst_mask */
465 FALSE
), /* pcrel_offset */
467 /* Computes a tp-relative displacement, the difference between the value of
468 sym+add and the value of the thread pointer (r13). */
469 HOWTO (R_MICROBLAZE_TLSGOTTPREL32
,
471 2, /* size (0 = byte, 1 = short, 2 = long) */
473 FALSE
, /* pc_relative */
475 complain_overflow_dont
, /* complain_on_overflow */
476 bfd_elf_generic_reloc
, /* special_function */
477 "R_MICROBLAZE_TLSGOTTPREL32", /* name */
478 FALSE
, /* partial_inplace */
480 0x0000ffff, /* dst_mask */
481 FALSE
), /* pcrel_offset */
483 /* Computes a tp-relative displacement, the difference between the value of
484 sym+add and the value of the thread pointer (r13). */
485 HOWTO (R_MICROBLAZE_TLSTPREL32
,
487 2, /* size (0 = byte, 1 = short, 2 = long) */
489 FALSE
, /* pc_relative */
491 complain_overflow_dont
, /* complain_on_overflow */
492 bfd_elf_generic_reloc
, /* special_function */
493 "R_MICROBLAZE_TLSTPREL32", /* name */
494 FALSE
, /* partial_inplace */
496 0x0000ffff, /* dst_mask */
497 FALSE
), /* pcrel_offset */
502 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
505 /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */
508 microblaze_elf_howto_init (void)
512 for (i
= NUM_ELEM (microblaze_elf_howto_raw
); i
--;)
516 type
= microblaze_elf_howto_raw
[i
].type
;
518 BFD_ASSERT (type
< NUM_ELEM (microblaze_elf_howto_table
));
520 microblaze_elf_howto_table
[type
] = & microblaze_elf_howto_raw
[i
];
524 static reloc_howto_type
*
525 microblaze_elf_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
526 bfd_reloc_code_real_type code
)
528 enum elf_microblaze_reloc_type microblaze_reloc
= R_MICROBLAZE_NONE
;
533 microblaze_reloc
= R_MICROBLAZE_NONE
;
535 case BFD_RELOC_MICROBLAZE_64_NONE
:
536 microblaze_reloc
= R_MICROBLAZE_64_NONE
;
539 microblaze_reloc
= R_MICROBLAZE_32
;
541 /* RVA is treated the same as 32 */
543 microblaze_reloc
= R_MICROBLAZE_32
;
545 case BFD_RELOC_32_PCREL
:
546 microblaze_reloc
= R_MICROBLAZE_32_PCREL
;
548 case BFD_RELOC_64_PCREL
:
549 microblaze_reloc
= R_MICROBLAZE_64_PCREL
;
551 case BFD_RELOC_MICROBLAZE_32_LO_PCREL
:
552 microblaze_reloc
= R_MICROBLAZE_32_PCREL_LO
;
555 microblaze_reloc
= R_MICROBLAZE_64
;
557 case BFD_RELOC_MICROBLAZE_32_LO
:
558 microblaze_reloc
= R_MICROBLAZE_32_LO
;
560 case BFD_RELOC_MICROBLAZE_32_ROSDA
:
561 microblaze_reloc
= R_MICROBLAZE_SRO32
;
563 case BFD_RELOC_MICROBLAZE_32_RWSDA
:
564 microblaze_reloc
= R_MICROBLAZE_SRW32
;
566 case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM
:
567 microblaze_reloc
= R_MICROBLAZE_32_SYM_OP_SYM
;
569 case BFD_RELOC_VTABLE_INHERIT
:
570 microblaze_reloc
= R_MICROBLAZE_GNU_VTINHERIT
;
572 case BFD_RELOC_VTABLE_ENTRY
:
573 microblaze_reloc
= R_MICROBLAZE_GNU_VTENTRY
;
575 case BFD_RELOC_MICROBLAZE_64_GOTPC
:
576 microblaze_reloc
= R_MICROBLAZE_GOTPC_64
;
578 case BFD_RELOC_MICROBLAZE_64_GOT
:
579 microblaze_reloc
= R_MICROBLAZE_GOT_64
;
581 case BFD_RELOC_MICROBLAZE_64_PLT
:
582 microblaze_reloc
= R_MICROBLAZE_PLT_64
;
584 case BFD_RELOC_MICROBLAZE_64_GOTOFF
:
585 microblaze_reloc
= R_MICROBLAZE_GOTOFF_64
;
587 case BFD_RELOC_MICROBLAZE_32_GOTOFF
:
588 microblaze_reloc
= R_MICROBLAZE_GOTOFF_32
;
590 case BFD_RELOC_MICROBLAZE_64_TLSGD
:
591 microblaze_reloc
= R_MICROBLAZE_TLSGD
;
593 case BFD_RELOC_MICROBLAZE_64_TLSLD
:
594 microblaze_reloc
= R_MICROBLAZE_TLSLD
;
596 case BFD_RELOC_MICROBLAZE_32_TLSDTPREL
:
597 microblaze_reloc
= R_MICROBLAZE_TLSDTPREL32
;
599 case BFD_RELOC_MICROBLAZE_64_TLSDTPREL
:
600 microblaze_reloc
= R_MICROBLAZE_TLSDTPREL64
;
602 case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD
:
603 microblaze_reloc
= R_MICROBLAZE_TLSDTPMOD32
;
605 case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL
:
606 microblaze_reloc
= R_MICROBLAZE_TLSGOTTPREL32
;
608 case BFD_RELOC_MICROBLAZE_64_TLSTPREL
:
609 microblaze_reloc
= R_MICROBLAZE_TLSTPREL32
;
611 case BFD_RELOC_MICROBLAZE_COPY
:
612 microblaze_reloc
= R_MICROBLAZE_COPY
;
615 return (reloc_howto_type
*) NULL
;
618 if (!microblaze_elf_howto_table
[R_MICROBLAZE_32
])
619 /* Initialize howto table if needed. */
620 microblaze_elf_howto_init ();
622 return microblaze_elf_howto_table
[(int) microblaze_reloc
];
625 static reloc_howto_type
*
626 microblaze_elf_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
631 for (i
= 0; i
< NUM_ELEM (microblaze_elf_howto_raw
); i
++)
632 if (microblaze_elf_howto_raw
[i
].name
!= NULL
633 && strcasecmp (microblaze_elf_howto_raw
[i
].name
, r_name
) == 0)
634 return µblaze_elf_howto_raw
[i
];
639 /* Set the howto pointer for a RCE ELF reloc. */
642 microblaze_elf_info_to_howto (bfd
* abfd ATTRIBUTE_UNUSED
,
644 Elf_Internal_Rela
* dst
)
648 if (!microblaze_elf_howto_table
[R_MICROBLAZE_32
])
649 /* Initialize howto table if needed. */
650 microblaze_elf_howto_init ();
652 r_type
= ELF32_R_TYPE (dst
->r_info
);
653 if (r_type
>= R_MICROBLAZE_max
)
655 /* 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 (_("%s: unknown relocation type %d"),
953 bfd_get_filename (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 */
1006 /* This is a final link. */
1009 unresolved_reloc
= FALSE
;
1011 if (r_symndx
< symtab_hdr
->sh_info
)
1014 sym
= local_syms
+ r_symndx
;
1015 sec
= local_sections
[r_symndx
];
1018 sym_name
= "<local symbol>";
1019 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1020 /* r_addend may have changed if the reference section was
1022 addend
= rel
->r_addend
;
1026 /* External symbol. */
1027 bfd_boolean warned ATTRIBUTE_UNUSED
;
1028 bfd_boolean ignored ATTRIBUTE_UNUSED
;
1030 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1031 r_symndx
, symtab_hdr
, sym_hashes
,
1033 unresolved_reloc
, warned
, ignored
);
1034 sym_name
= h
->root
.root
.string
;
1037 /* Sanity check the address. */
1038 if (offset
> bfd_get_section_limit (input_bfd
, input_section
))
1040 r
= bfd_reloc_outofrange
;
1044 switch ((int) r_type
)
1046 case (int) R_MICROBLAZE_SRO32
:
1050 /* Only relocate if the symbol is defined. */
1053 name
= bfd_get_section_name (sec
->owner
, sec
);
1055 if (strcmp (name
, ".sdata2") == 0
1056 || strcmp (name
, ".sbss2") == 0)
1058 if (ro_small_data_pointer
== 0)
1059 microblaze_elf_final_sdp (info
);
1060 if (ro_small_data_pointer
== 0)
1063 r
= bfd_reloc_undefined
;
1067 /* At this point `relocation' contains the object's
1069 relocation
-= ro_small_data_pointer
;
1070 /* Now it contains the offset from _SDA2_BASE_. */
1071 r
= _bfd_final_link_relocate (howto
, input_bfd
,
1074 relocation
, addend
);
1079 /* xgettext:c-format */
1080 (_("%s: The target (%s) of an %s relocation "
1081 "is in the wrong section (%s)"),
1082 bfd_get_filename (input_bfd
),
1084 microblaze_elf_howto_table
[(int) r_type
]->name
,
1085 bfd_get_section_name (sec
->owner
, sec
));
1086 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1094 case (int) R_MICROBLAZE_SRW32
:
1098 /* Only relocate if the symbol is defined. */
1101 name
= bfd_get_section_name (sec
->owner
, sec
);
1103 if (strcmp (name
, ".sdata") == 0
1104 || strcmp (name
, ".sbss") == 0)
1106 if (rw_small_data_pointer
== 0)
1107 microblaze_elf_final_sdp (info
);
1108 if (rw_small_data_pointer
== 0)
1111 r
= bfd_reloc_undefined
;
1115 /* At this point `relocation' contains the object's
1117 relocation
-= rw_small_data_pointer
;
1118 /* Now it contains the offset from _SDA_BASE_. */
1119 r
= _bfd_final_link_relocate (howto
, input_bfd
,
1122 relocation
, addend
);
1127 /* xgettext:c-format */
1128 (_("%s: The target (%s) of an %s relocation "
1129 "is in the wrong section (%s)"),
1130 bfd_get_filename (input_bfd
),
1132 microblaze_elf_howto_table
[(int) r_type
]->name
,
1133 bfd_get_section_name (sec
->owner
, sec
));
1134 /*bfd_set_error (bfd_error_bad_value); ??? why? */
1142 case (int) R_MICROBLAZE_32_SYM_OP_SYM
:
1143 break; /* Do nothing. */
1145 case (int) R_MICROBLAZE_GOTPC_64
:
1146 relocation
= (htab
->elf
.sgotplt
->output_section
->vma
1147 + htab
->elf
.sgotplt
->output_offset
);
1148 relocation
-= (input_section
->output_section
->vma
1149 + input_section
->output_offset
1150 + offset
+ INST_WORD_SIZE
);
1151 relocation
+= addend
;
1152 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1153 contents
+ offset
+ endian
);
1154 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1155 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1158 case (int) R_MICROBLAZE_PLT_64
:
1161 if (htab
->elf
.splt
!= NULL
&& h
!= NULL
1162 && h
->plt
.offset
!= (bfd_vma
) -1)
1164 relocation
= (htab
->elf
.splt
->output_section
->vma
1165 + htab
->elf
.splt
->output_offset
1167 unresolved_reloc
= FALSE
;
1168 immediate
= relocation
- (input_section
->output_section
->vma
1169 + input_section
->output_offset
1170 + offset
+ INST_WORD_SIZE
);
1171 bfd_put_16 (input_bfd
, (immediate
>> 16) & 0xffff,
1172 contents
+ offset
+ endian
);
1173 bfd_put_16 (input_bfd
, immediate
& 0xffff,
1174 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1178 relocation
-= (input_section
->output_section
->vma
1179 + input_section
->output_offset
1180 + offset
+ INST_WORD_SIZE
);
1181 immediate
= relocation
;
1182 bfd_put_16 (input_bfd
, (immediate
>> 16) & 0xffff,
1183 contents
+ offset
+ endian
);
1184 bfd_put_16 (input_bfd
, immediate
& 0xffff,
1185 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1190 case (int) R_MICROBLAZE_TLSGD
:
1191 tls_type
= (TLS_TLS
| TLS_GD
);
1193 case (int) R_MICROBLAZE_TLSLD
:
1194 tls_type
= (TLS_TLS
| TLS_LD
);
1197 case (int) R_MICROBLAZE_GOT_64
:
1202 bfd_vma static_value
;
1204 bfd_boolean need_relocs
= FALSE
;
1205 if (htab
->elf
.sgot
== NULL
)
1211 /* 1. Identify GOT Offset;
1212 2. Compute Static Values
1213 3. Process Module Id, Process Offset
1214 4. Fixup Relocation with GOT offset value. */
1216 /* 1. Determine GOT Offset to use : TLS_LD, global, local */
1217 if (IS_TLS_LD (tls_type
))
1218 offp
= &htab
->tlsld_got
.offset
;
1221 if (htab
->elf
.sgotplt
!= NULL
1222 && h
->got
.offset
!= (bfd_vma
) -1)
1223 offp
= &h
->got
.offset
;
1229 if (local_got_offsets
== NULL
)
1231 offp
= &local_got_offsets
[r_symndx
];
1240 if (IS_TLS_LD(tls_type
) || IS_TLS_GD(tls_type
))
1243 /* Symbol index to use for relocs */
1247 elf_hash_table (info
)->dynamic_sections_created
;
1249 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1250 bfd_link_pic (info
),
1252 && (!bfd_link_pic (info
)
1253 || !SYMBOL_REFERENCES_LOCAL (info
, h
)))
1257 /* Need to generate relocs ? */
1258 if ((bfd_link_pic (info
) || indx
!= 0)
1260 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1261 || h
->root
.type
!= bfd_link_hash_undefweak
))
1264 /* 2. Compute/Emit Static value of r-expression */
1265 static_value
= relocation
+ addend
;
1267 /* 3. Process module-id and offset */
1268 if (! ((*offp
) & 1) )
1272 got_offset
= (htab
->elf
.sgot
->output_section
->vma
1273 + htab
->elf
.sgot
->output_offset
1276 /* Process module-id */
1277 if (IS_TLS_LD(tls_type
))
1279 if (! bfd_link_pic (info
))
1280 bfd_put_32 (output_bfd
, 1,
1281 htab
->elf
.sgot
->contents
+ off
);
1283 microblaze_elf_output_dynamic_relocation
1286 htab
->elf
.srelgot
->reloc_count
++,
1287 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32
,
1290 else if (IS_TLS_GD(tls_type
))
1293 bfd_put_32 (output_bfd
, 1,
1294 htab
->elf
.sgot
->contents
+ off
);
1296 microblaze_elf_output_dynamic_relocation
1299 htab
->elf
.srelgot
->reloc_count
++,
1300 /* symindex= */ indx
, R_MICROBLAZE_TLSDTPMOD32
,
1301 got_offset
, indx
? 0 : static_value
);
1304 /* Process Offset */
1305 if (htab
->elf
.srelgot
== NULL
)
1308 got_offset
= (htab
->elf
.sgot
->output_section
->vma
1309 + htab
->elf
.sgot
->output_offset
1311 if (IS_TLS_LD(tls_type
))
1313 /* For LD, offset should be 0 */
1315 bfd_put_32 (output_bfd
, 0,
1316 htab
->elf
.sgot
->contents
+ off2
);
1318 else if (IS_TLS_GD(tls_type
))
1321 static_value
-= dtprel_base(info
);
1323 microblaze_elf_output_dynamic_relocation
1326 htab
->elf
.srelgot
->reloc_count
++,
1327 /* symindex= */ indx
, R_MICROBLAZE_TLSDTPREL32
,
1328 got_offset
, indx
? 0 : static_value
);
1330 bfd_put_32 (output_bfd
, static_value
,
1331 htab
->elf
.sgot
->contents
+ off2
);
1335 bfd_put_32 (output_bfd
, static_value
,
1336 htab
->elf
.sgot
->contents
+ off2
);
1338 /* Relocs for dyn symbols generated by
1339 finish_dynamic_symbols */
1340 if (bfd_link_pic (info
) && h
== NULL
)
1343 microblaze_elf_output_dynamic_relocation
1346 htab
->elf
.srelgot
->reloc_count
++,
1347 /* symindex= */ indx
, R_MICROBLAZE_REL
,
1348 got_offset
, static_value
);
1353 /* 4. Fixup Relocation with GOT offset value
1354 Compute relative address of GOT entry for applying
1355 the current relocation */
1356 relocation
= htab
->elf
.sgot
->output_section
->vma
1357 + htab
->elf
.sgot
->output_offset
1359 - htab
->elf
.sgotplt
->output_section
->vma
1360 - htab
->elf
.sgotplt
->output_offset
;
1362 /* Apply Current Relocation */
1363 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1364 contents
+ offset
+ endian
);
1365 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1366 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1368 unresolved_reloc
= FALSE
;
1372 case (int) R_MICROBLAZE_GOTOFF_64
:
1375 unsigned short lo
, high
;
1376 relocation
+= addend
;
1377 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
1378 + htab
->elf
.sgotplt
->output_offset
);
1379 /* Write this value into correct location. */
1380 immediate
= relocation
;
1381 lo
= immediate
& 0x0000ffff;
1382 high
= (immediate
>> 16) & 0x0000ffff;
1383 bfd_put_16 (input_bfd
, high
, contents
+ offset
+ endian
);
1384 bfd_put_16 (input_bfd
, lo
,
1385 contents
+ offset
+ INST_WORD_SIZE
+ endian
);
1389 case (int) R_MICROBLAZE_GOTOFF_32
:
1391 relocation
+= addend
;
1392 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
1393 + htab
->elf
.sgotplt
->output_offset
);
1394 /* Write this value into correct location. */
1395 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1399 case (int) R_MICROBLAZE_TLSDTPREL64
:
1400 relocation
+= addend
;
1401 relocation
-= dtprel_base(info
);
1402 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1403 contents
+ offset
+ 2);
1404 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1405 contents
+ offset
+ 2 + INST_WORD_SIZE
);
1407 case (int) R_MICROBLAZE_64_PCREL
:
1408 case (int) R_MICROBLAZE_64
:
1409 case (int) R_MICROBLAZE_32
:
1411 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
1412 from removed linkonce sections, or sections discarded by
1414 if (r_symndx
== STN_UNDEF
|| (input_section
->flags
& SEC_ALLOC
) == 0)
1416 relocation
+= addend
;
1417 if (r_type
== R_MICROBLAZE_32
)
1418 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1421 if (r_type
== R_MICROBLAZE_64_PCREL
)
1422 relocation
-= (input_section
->output_section
->vma
1423 + input_section
->output_offset
1424 + offset
+ INST_WORD_SIZE
);
1425 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1426 contents
+ offset
+ endian
);
1427 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1428 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1433 if ((bfd_link_pic (info
)
1435 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1436 || h
->root
.type
!= bfd_link_hash_undefweak
)
1437 && (!howto
->pc_relative
1441 || !h
->def_regular
))))
1442 || (!bfd_link_pic (info
)
1448 || h
->root
.type
== bfd_link_hash_undefweak
1449 || h
->root
.type
== bfd_link_hash_undefined
)))
1451 Elf_Internal_Rela outrel
;
1455 /* When generating a shared object, these relocations
1456 are copied into the output file to be resolved at run
1459 BFD_ASSERT (sreloc
!= NULL
);
1464 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1466 if (outrel
.r_offset
== (bfd_vma
) -1)
1468 else if (outrel
.r_offset
== (bfd_vma
) -2)
1470 outrel
.r_offset
+= (input_section
->output_section
->vma
1471 + input_section
->output_offset
);
1474 memset (&outrel
, 0, sizeof outrel
);
1475 /* h->dynindx may be -1 if the symbol was marked to
1478 && ((! info
->symbolic
&& h
->dynindx
!= -1)
1479 || !h
->def_regular
))
1481 BFD_ASSERT (h
->dynindx
!= -1);
1482 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
1483 outrel
.r_addend
= addend
;
1487 if (r_type
== R_MICROBLAZE_32
)
1489 outrel
.r_info
= ELF32_R_INFO (0, R_MICROBLAZE_REL
);
1490 outrel
.r_addend
= relocation
+ addend
;
1496 (_("%B: probably compiled without -fPIC?"),
1498 bfd_set_error (bfd_error_bad_value
);
1503 loc
= sreloc
->contents
;
1504 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1505 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1510 relocation
+= addend
;
1511 if (r_type
== R_MICROBLAZE_32
)
1512 bfd_put_32 (input_bfd
, relocation
, contents
+ offset
);
1515 if (r_type
== R_MICROBLAZE_64_PCREL
)
1516 relocation
-= (input_section
->output_section
->vma
1517 + input_section
->output_offset
1518 + offset
+ INST_WORD_SIZE
);
1519 bfd_put_16 (input_bfd
, (relocation
>> 16) & 0xffff,
1520 contents
+ offset
+ endian
);
1521 bfd_put_16 (input_bfd
, relocation
& 0xffff,
1522 contents
+ offset
+ endian
+ INST_WORD_SIZE
);
1529 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
1531 relocation
, addend
);
1538 if (r
!= bfd_reloc_ok
)
1540 /* FIXME: This should be generic enough to go in a utility. */
1544 name
= h
->root
.root
.string
;
1547 name
= (bfd_elf_string_from_elf_section
1548 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
1549 if (name
== NULL
|| *name
== '\0')
1550 name
= bfd_section_name (input_bfd
, sec
);
1558 case bfd_reloc_overflow
:
1559 (*info
->callbacks
->reloc_overflow
)
1560 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1561 (bfd_vma
) 0, input_bfd
, input_section
, offset
);
1564 case bfd_reloc_undefined
:
1565 (*info
->callbacks
->undefined_symbol
)
1566 (info
, name
, input_bfd
, input_section
, offset
, TRUE
);
1569 case bfd_reloc_outofrange
:
1570 errmsg
= _("internal error: out of range error");
1573 case bfd_reloc_notsupported
:
1574 errmsg
= _("internal error: unsupported relocation error");
1577 case bfd_reloc_dangerous
:
1578 errmsg
= _("internal error: dangerous error");
1582 errmsg
= _("internal error: unknown error");
1585 (*info
->callbacks
->warning
) (info
, errmsg
, name
, input_bfd
,
1586 input_section
, offset
);
1595 /* Calculate fixup value for reference. */
1598 calc_fixup (bfd_vma start
, bfd_vma size
, asection
*sec
)
1600 bfd_vma end
= start
+ size
;
1603 if (sec
== NULL
|| sec
->relax
== NULL
)
1606 /* Look for addr in relax table, total fixup value. */
1607 for (i
= 0; i
< sec
->relax_count
; i
++)
1609 if (end
<= sec
->relax
[i
].addr
)
1611 if ((end
!= start
) && (start
> sec
->relax
[i
].addr
))
1613 fixup
+= sec
->relax
[i
].size
;
1618 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1619 a 32-bit instruction. */
1621 microblaze_bfd_write_imm_value_32 (bfd
*abfd
, bfd_byte
*bfd_addr
, bfd_vma val
)
1623 unsigned long instr
= bfd_get_32 (abfd
, bfd_addr
);
1624 instr
&= ~0x0000ffff;
1625 instr
|= (val
& 0x0000ffff);
1626 bfd_put_32 (abfd
, instr
, bfd_addr
);
1629 /* Read-modify-write into the bfd, an immediate value into appropriate fields of
1630 two consecutive 32-bit instructions. */
1632 microblaze_bfd_write_imm_value_64 (bfd
*abfd
, bfd_byte
*bfd_addr
, bfd_vma val
)
1634 unsigned long instr_hi
;
1635 unsigned long instr_lo
;
1637 instr_hi
= bfd_get_32 (abfd
, bfd_addr
);
1638 instr_hi
&= ~0x0000ffff;
1639 instr_hi
|= ((val
>> 16) & 0x0000ffff);
1640 bfd_put_32 (abfd
, instr_hi
, bfd_addr
);
1642 instr_lo
= bfd_get_32 (abfd
, bfd_addr
+ INST_WORD_SIZE
);
1643 instr_lo
&= ~0x0000ffff;
1644 instr_lo
|= (val
& 0x0000ffff);
1645 bfd_put_32 (abfd
, instr_lo
, bfd_addr
+ INST_WORD_SIZE
);
1649 microblaze_elf_relax_section (bfd
*abfd
,
1651 struct bfd_link_info
*link_info
,
1654 Elf_Internal_Shdr
*symtab_hdr
;
1655 Elf_Internal_Rela
*internal_relocs
;
1656 Elf_Internal_Rela
*free_relocs
= NULL
;
1657 Elf_Internal_Rela
*irel
, *irelend
;
1658 bfd_byte
*contents
= NULL
;
1659 bfd_byte
*free_contents
= NULL
;
1664 struct elf_link_hash_entry
*sym_hash
;
1665 Elf_Internal_Sym
*isymbuf
, *isymend
;
1666 Elf_Internal_Sym
*isym
;
1671 /* We only do this once per section. We may be able to delete some code
1672 by running multiple passes, but it is not worth it. */
1675 /* Only do this for a text section. */
1676 if (bfd_link_relocatable (link_info
)
1677 || (sec
->flags
& SEC_RELOC
) == 0
1678 || (sec
->reloc_count
== 0)
1679 || (sec
->flags
& SEC_CODE
) == 0)
1682 BFD_ASSERT ((sec
->size
> 0) || (sec
->rawsize
> 0));
1684 /* If this is the first time we have been called for this section,
1685 initialize the cooked size. */
1687 sec
->size
= sec
->rawsize
;
1689 /* Get symbols for this section. */
1690 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1691 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1692 symcount
= symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
1693 if (isymbuf
== NULL
)
1694 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
, symcount
,
1695 0, NULL
, NULL
, NULL
);
1696 BFD_ASSERT (isymbuf
!= NULL
);
1698 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
, link_info
->keep_memory
);
1699 if (internal_relocs
== NULL
)
1701 if (! link_info
->keep_memory
)
1702 free_relocs
= internal_relocs
;
1704 sec
->relax
= (struct relax_table
*) bfd_malloc ((sec
->reloc_count
+ 1)
1705 * sizeof (struct relax_table
));
1706 if (sec
->relax
== NULL
)
1708 sec
->relax_count
= 0;
1710 irelend
= internal_relocs
+ sec
->reloc_count
;
1712 for (irel
= internal_relocs
; irel
< irelend
; irel
++, rel_count
++)
1715 if ((ELF32_R_TYPE (irel
->r_info
) != (int) R_MICROBLAZE_64_PCREL
)
1716 && (ELF32_R_TYPE (irel
->r_info
) != (int) R_MICROBLAZE_64
))
1717 continue; /* Can't delete this reloc. */
1719 /* Get the section contents. */
1720 if (contents
== NULL
)
1722 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1723 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1726 contents
= (bfd_byte
*) bfd_malloc (sec
->size
);
1727 if (contents
== NULL
)
1729 free_contents
= contents
;
1731 if (!bfd_get_section_contents (abfd
, sec
, contents
,
1732 (file_ptr
) 0, sec
->size
))
1734 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1738 /* Get the value of the symbol referred to by the reloc. */
1739 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
1741 /* A local symbol. */
1744 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
1745 if (isym
->st_shndx
== SHN_UNDEF
)
1746 sym_sec
= bfd_und_section_ptr
;
1747 else if (isym
->st_shndx
== SHN_ABS
)
1748 sym_sec
= bfd_abs_section_ptr
;
1749 else if (isym
->st_shndx
== SHN_COMMON
)
1750 sym_sec
= bfd_com_section_ptr
;
1752 sym_sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1754 symval
= _bfd_elf_rela_local_sym (abfd
, isym
, &sym_sec
, irel
);
1759 struct elf_link_hash_entry
*h
;
1761 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
1762 h
= elf_sym_hashes (abfd
)[indx
];
1763 BFD_ASSERT (h
!= NULL
);
1765 if (h
->root
.type
!= bfd_link_hash_defined
1766 && h
->root
.type
!= bfd_link_hash_defweak
)
1767 /* This appears to be a reference to an undefined
1768 symbol. Just ignore it--it will be caught by the
1769 regular reloc processing. */
1772 symval
= (h
->root
.u
.def
.value
1773 + h
->root
.u
.def
.section
->output_section
->vma
1774 + h
->root
.u
.def
.section
->output_offset
);
1777 /* If this is a PC-relative reloc, subtract the instr offset from
1778 the symbol value. */
1779 if (ELF32_R_TYPE (irel
->r_info
) == (int) R_MICROBLAZE_64_PCREL
)
1781 symval
= symval
+ irel
->r_addend
1783 + sec
->output_section
->vma
1784 + sec
->output_offset
);
1787 symval
+= irel
->r_addend
;
1789 if ((symval
& 0xffff8000) == 0
1790 || (symval
& 0xffff8000) == 0xffff8000)
1792 /* We can delete this instruction. */
1793 sec
->relax
[sec
->relax_count
].addr
= irel
->r_offset
;
1794 sec
->relax
[sec
->relax_count
].size
= INST_WORD_SIZE
;
1797 /* Rewrite relocation type. */
1798 switch ((enum elf_microblaze_reloc_type
) ELF32_R_TYPE (irel
->r_info
))
1800 case R_MICROBLAZE_64_PCREL
:
1801 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1802 (int) R_MICROBLAZE_32_PCREL_LO
);
1804 case R_MICROBLAZE_64
:
1805 irel
->r_info
= ELF32_R_INFO (ELF32_R_SYM (irel
->r_info
),
1806 (int) R_MICROBLAZE_32_LO
);
1809 /* Cannot happen. */
1813 } /* Loop through all relocations. */
1815 /* Loop through the relocs again, and see if anything needs to change. */
1816 if (sec
->relax_count
> 0)
1818 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
1820 sec
->relax
[sec
->relax_count
].addr
= sec
->size
;
1822 for (irel
= internal_relocs
; irel
< irelend
; irel
++, rel_count
++)
1826 /* Get the new reloc address. */
1827 nraddr
= irel
->r_offset
- calc_fixup (irel
->r_offset
, 0, sec
);
1828 switch ((enum elf_microblaze_reloc_type
) ELF32_R_TYPE (irel
->r_info
))
1832 case R_MICROBLAZE_64_PCREL
:
1834 case R_MICROBLAZE_64
:
1835 case R_MICROBLAZE_32_LO
:
1836 /* If this reloc is against a symbol defined in this
1837 section, we must check the addend to see it will put the value in
1838 range to be adjusted, and hence must be changed. */
1839 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
1841 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
1842 /* Only handle relocs against .text. */
1843 if (isym
->st_shndx
== shndx
1844 && ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
)
1845 irel
->r_addend
-= calc_fixup (irel
->r_addend
, 0, sec
);
1848 case R_MICROBLAZE_NONE
:
1850 /* This was a PC-relative instruction that was
1851 completely resolved. */
1853 bfd_vma target_address
;
1854 target_address
= irel
->r_addend
+ irel
->r_offset
;
1855 sfix
= calc_fixup (irel
->r_offset
, 0, sec
);
1856 efix
= calc_fixup (target_address
, 0, sec
);
1857 irel
->r_addend
-= (efix
- sfix
);
1858 /* Should use HOWTO. */
1859 microblaze_bfd_write_imm_value_32 (abfd
, contents
+ irel
->r_offset
,
1863 case R_MICROBLAZE_64_NONE
:
1865 /* This was a PC-relative 64-bit instruction that was
1866 completely resolved. */
1868 bfd_vma target_address
;
1869 target_address
= irel
->r_addend
+ irel
->r_offset
+ INST_WORD_SIZE
;
1870 sfix
= calc_fixup (irel
->r_offset
+ INST_WORD_SIZE
, 0, sec
);
1871 efix
= calc_fixup (target_address
, 0, sec
);
1872 irel
->r_addend
-= (efix
- sfix
);
1873 microblaze_bfd_write_imm_value_32 (abfd
, contents
+ irel
->r_offset
1874 + INST_WORD_SIZE
, irel
->r_addend
);
1878 irel
->r_offset
= nraddr
;
1879 } /* Change all relocs in this section. */
1881 /* Look through all other sections. */
1882 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1884 Elf_Internal_Rela
*irelocs
;
1885 Elf_Internal_Rela
*irelscan
, *irelscanend
;
1886 bfd_byte
*ocontents
;
1889 || (o
->flags
& SEC_RELOC
) == 0
1890 || o
->reloc_count
== 0)
1893 /* We always cache the relocs. Perhaps, if info->keep_memory is
1894 FALSE, we should free them, if we are permitted to. */
1896 irelocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
, TRUE
);
1897 if (irelocs
== NULL
)
1901 irelscanend
= irelocs
+ o
->reloc_count
;
1902 for (irelscan
= irelocs
; irelscan
< irelscanend
; irelscan
++)
1904 if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32
)
1906 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1908 /* Look at the reloc only if the value has been resolved. */
1909 if (isym
->st_shndx
== shndx
1910 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
1912 if (ocontents
== NULL
)
1914 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1915 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1918 /* We always cache the section contents.
1919 Perhaps, if info->keep_memory is FALSE, we
1920 should free them, if we are permitted to. */
1921 if (o
->rawsize
== 0)
1922 o
->rawsize
= o
->size
;
1923 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1924 if (ocontents
== NULL
)
1926 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1930 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1934 irelscan
->r_addend
-= calc_fixup (irelscan
->r_addend
, 0, sec
);
1936 else if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_SYM_OP_SYM
)
1938 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1940 /* Look at the reloc only if the value has been resolved. */
1941 if (ocontents
== NULL
)
1943 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1944 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1947 /* We always cache the section contents.
1948 Perhaps, if info->keep_memory is FALSE, we
1949 should free them, if we are permitted to. */
1951 if (o
->rawsize
== 0)
1952 o
->rawsize
= o
->size
;
1953 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1954 if (ocontents
== NULL
)
1956 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1960 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
1963 irelscan
->r_addend
-= calc_fixup (irel
->r_addend
1969 else if ((ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_PCREL_LO
)
1970 || (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_32_LO
))
1972 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
1974 /* Look at the reloc only if the value has been resolved. */
1975 if (isym
->st_shndx
== shndx
1976 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
1979 bfd_vma target_address
;
1981 if (ocontents
== NULL
)
1983 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
1984 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
1987 /* We always cache the section contents.
1988 Perhaps, if info->keep_memory is FALSE, we
1989 should free them, if we are permitted to. */
1990 if (o
->rawsize
== 0)
1991 o
->rawsize
= o
->size
;
1992 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
1993 if (ocontents
== NULL
)
1995 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
1999 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2003 unsigned long instr
= bfd_get_32 (abfd
, ocontents
+ irelscan
->r_offset
);
2004 immediate
= instr
& 0x0000ffff;
2005 target_address
= immediate
;
2006 offset
= calc_fixup (target_address
, 0, sec
);
2007 immediate
-= offset
;
2008 irelscan
->r_addend
-= offset
;
2009 microblaze_bfd_write_imm_value_32 (abfd
, ocontents
+ irelscan
->r_offset
,
2010 irelscan
->r_addend
);
2014 if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_64
)
2016 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
2018 /* Look at the reloc only if the value has been resolved. */
2019 if (isym
->st_shndx
== shndx
2020 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
2024 if (ocontents
== NULL
)
2026 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
2027 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
2030 /* We always cache the section contents.
2031 Perhaps, if info->keep_memory is FALSE, we
2032 should free them, if we are permitted to. */
2034 if (o
->rawsize
== 0)
2035 o
->rawsize
= o
->size
;
2036 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
2037 if (ocontents
== NULL
)
2039 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2043 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2046 unsigned long instr_hi
= bfd_get_32 (abfd
, ocontents
2047 + irelscan
->r_offset
);
2048 unsigned long instr_lo
= bfd_get_32 (abfd
, ocontents
2049 + irelscan
->r_offset
2051 immediate
= (instr_hi
& 0x0000ffff) << 16;
2052 immediate
|= (instr_lo
& 0x0000ffff);
2053 offset
= calc_fixup (irelscan
->r_addend
, 0, sec
);
2054 immediate
-= offset
;
2055 irelscan
->r_addend
-= offset
;
2058 else if (ELF32_R_TYPE (irelscan
->r_info
) == (int) R_MICROBLAZE_64_PCREL
)
2060 isym
= isymbuf
+ ELF32_R_SYM (irelscan
->r_info
);
2062 /* Look at the reloc only if the value has been resolved. */
2063 if (isym
->st_shndx
== shndx
2064 && (ELF32_ST_TYPE (isym
->st_info
) == STT_SECTION
))
2067 bfd_vma target_address
;
2069 if (ocontents
== NULL
)
2071 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
2072 ocontents
= elf_section_data (o
)->this_hdr
.contents
;
2075 /* We always cache the section contents.
2076 Perhaps, if info->keep_memory is FALSE, we
2077 should free them, if we are permitted to. */
2078 if (o
->rawsize
== 0)
2079 o
->rawsize
= o
->size
;
2080 ocontents
= (bfd_byte
*) bfd_malloc (o
->rawsize
);
2081 if (ocontents
== NULL
)
2083 if (!bfd_get_section_contents (abfd
, o
, ocontents
,
2087 elf_section_data (o
)->this_hdr
.contents
= ocontents
;
2090 unsigned long instr_hi
= bfd_get_32 (abfd
, ocontents
2091 + irelscan
->r_offset
);
2092 unsigned long instr_lo
= bfd_get_32 (abfd
, ocontents
2093 + irelscan
->r_offset
2095 immediate
= (instr_hi
& 0x0000ffff) << 16;
2096 immediate
|= (instr_lo
& 0x0000ffff);
2097 target_address
= immediate
;
2098 offset
= calc_fixup (target_address
, 0, sec
);
2099 immediate
-= offset
;
2100 irelscan
->r_addend
-= offset
;
2101 microblaze_bfd_write_imm_value_64 (abfd
, ocontents
2102 + irelscan
->r_offset
, immediate
);
2108 /* Adjust the local symbols defined in this section. */
2109 isymend
= isymbuf
+ symtab_hdr
->sh_info
;
2110 for (isym
= isymbuf
; isym
< isymend
; isym
++)
2112 if (isym
->st_shndx
== shndx
)
2114 isym
->st_value
-= calc_fixup (isym
->st_value
, 0, sec
);
2116 isym
->st_size
-= calc_fixup (isym
->st_value
, isym
->st_size
, sec
);
2120 /* Now adjust the global symbols defined in this section. */
2121 isym
= isymbuf
+ symtab_hdr
->sh_info
;
2122 symcount
= (symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
)) - symtab_hdr
->sh_info
;
2123 for (sym_index
= 0; sym_index
< symcount
; sym_index
++)
2125 sym_hash
= elf_sym_hashes (abfd
)[sym_index
];
2126 if ((sym_hash
->root
.type
== bfd_link_hash_defined
2127 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
2128 && sym_hash
->root
.u
.def
.section
== sec
)
2130 sym_hash
->root
.u
.def
.value
-= calc_fixup (sym_hash
->root
.u
.def
.value
,
2133 sym_hash
->size
-= calc_fixup (sym_hash
->root
.u
.def
.value
,
2134 sym_hash
->size
, sec
);
2138 /* Physically move the code and change the cooked size. */
2139 dest
= sec
->relax
[0].addr
;
2140 for (i
= 0; i
< sec
->relax_count
; i
++)
2143 src
= sec
->relax
[i
].addr
+ sec
->relax
[i
].size
;
2144 len
= sec
->relax
[i
+1].addr
- sec
->relax
[i
].addr
- sec
->relax
[i
].size
;
2146 memmove (contents
+ dest
, contents
+ src
, len
);
2147 sec
->size
-= sec
->relax
[i
].size
;
2151 elf_section_data (sec
)->relocs
= internal_relocs
;
2154 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2155 free_contents
= NULL
;
2157 symtab_hdr
->contents
= (bfd_byte
*) isymbuf
;
2160 if (free_relocs
!= NULL
)
2166 if (free_contents
!= NULL
)
2168 if (!link_info
->keep_memory
)
2169 free (free_contents
);
2171 /* Cache the section contents for elf_link_input_bfd. */
2172 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2173 free_contents
= NULL
;
2176 if (sec
->relax_count
== 0)
2187 if (free_relocs
!= NULL
)
2189 if (free_contents
!= NULL
)
2190 free (free_contents
);
2191 if (sec
->relax
!= NULL
)
2195 sec
->relax_count
= 0;
2200 /* Return the section that should be marked against GC for a given
2204 microblaze_elf_gc_mark_hook (asection
*sec
,
2205 struct bfd_link_info
* info
,
2206 Elf_Internal_Rela
* rel
,
2207 struct elf_link_hash_entry
* h
,
2208 Elf_Internal_Sym
* sym
)
2211 switch (ELF32_R_TYPE (rel
->r_info
))
2213 case R_MICROBLAZE_GNU_VTINHERIT
:
2214 case R_MICROBLAZE_GNU_VTENTRY
:
2218 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2221 /* Update the got entry reference counts for the section being removed. */
2224 microblaze_elf_gc_sweep_hook (bfd
* abfd ATTRIBUTE_UNUSED
,
2225 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
2226 asection
* sec ATTRIBUTE_UNUSED
,
2227 const Elf_Internal_Rela
* relocs ATTRIBUTE_UNUSED
)
2234 #define PLT_ENTRY_SIZE 16
2236 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
2237 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
2238 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
2239 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
2240 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
2243 update_local_sym_info (bfd
*abfd
,
2244 Elf_Internal_Shdr
*symtab_hdr
,
2245 unsigned long r_symndx
,
2246 unsigned int tls_type
)
2248 bfd_signed_vma
*local_got_refcounts
= elf_local_got_refcounts (abfd
);
2249 unsigned char *local_got_tls_masks
;
2251 if (local_got_refcounts
== NULL
)
2253 bfd_size_type size
= symtab_hdr
->sh_info
;
2255 size
*= (sizeof (*local_got_refcounts
) + sizeof (*local_got_tls_masks
));
2256 local_got_refcounts
= bfd_zalloc (abfd
, size
);
2257 if (local_got_refcounts
== NULL
)
2259 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2262 local_got_tls_masks
=
2263 (unsigned char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2264 local_got_tls_masks
[r_symndx
] |= tls_type
;
2265 local_got_refcounts
[r_symndx
] += 1;
2269 /* Look through the relocs for a section during the first phase. */
2272 microblaze_elf_check_relocs (bfd
* abfd
,
2273 struct bfd_link_info
* info
,
2275 const Elf_Internal_Rela
* relocs
)
2277 Elf_Internal_Shdr
* symtab_hdr
;
2278 struct elf_link_hash_entry
** sym_hashes
;
2279 struct elf_link_hash_entry
** sym_hashes_end
;
2280 const Elf_Internal_Rela
* rel
;
2281 const Elf_Internal_Rela
* rel_end
;
2282 struct elf32_mb_link_hash_table
*htab
;
2283 asection
*sreloc
= NULL
;
2285 if (bfd_link_relocatable (info
))
2288 htab
= elf32_mb_hash_table (info
);
2292 symtab_hdr
= & elf_tdata (abfd
)->symtab_hdr
;
2293 sym_hashes
= elf_sym_hashes (abfd
);
2294 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/ sizeof (Elf32_External_Sym
);
2295 if (!elf_bad_symtab (abfd
))
2296 sym_hashes_end
-= symtab_hdr
->sh_info
;
2298 rel_end
= relocs
+ sec
->reloc_count
;
2300 for (rel
= relocs
; rel
< rel_end
; rel
++)
2302 unsigned int r_type
;
2303 struct elf_link_hash_entry
* h
;
2304 unsigned long r_symndx
;
2305 unsigned char tls_type
= 0;
2307 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2308 r_type
= ELF32_R_TYPE (rel
->r_info
);
2310 if (r_symndx
< symtab_hdr
->sh_info
)
2314 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2316 /* PR15323, ref flags aren't set for references in the same
2318 h
->root
.non_ir_ref
= 1;
2323 /* This relocation describes the C++ object vtable hierarchy.
2324 Reconstruct it for later use during GC. */
2325 case R_MICROBLAZE_GNU_VTINHERIT
:
2326 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2330 /* This relocation describes which C++ vtable entries are actually
2331 used. Record for later use during GC. */
2332 case R_MICROBLAZE_GNU_VTENTRY
:
2333 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2337 /* This relocation requires .plt entry. */
2338 case R_MICROBLAZE_PLT_64
:
2342 h
->plt
.refcount
+= 1;
2346 /* This relocation requires .got entry. */
2347 case R_MICROBLAZE_TLSGD
:
2348 tls_type
|= (TLS_TLS
| TLS_GD
);
2350 case R_MICROBLAZE_TLSLD
:
2351 tls_type
|= (TLS_TLS
| TLS_LD
);
2354 sec
->has_tls_reloc
= 1;
2356 case R_MICROBLAZE_GOT_64
:
2357 if (htab
->elf
.sgot
== NULL
)
2359 if (htab
->elf
.dynobj
== NULL
)
2360 htab
->elf
.dynobj
= abfd
;
2361 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
2366 h
->got
.refcount
+= 1;
2367 elf32_mb_hash_entry (h
)->tls_mask
|= tls_type
;
2371 if (! update_local_sym_info(abfd
, symtab_hdr
, r_symndx
, tls_type
) )
2376 case R_MICROBLAZE_64
:
2377 case R_MICROBLAZE_64_PCREL
:
2378 case R_MICROBLAZE_32
:
2380 if (h
!= NULL
&& !bfd_link_pic (info
))
2382 /* we may need a copy reloc. */
2385 /* we may also need a .plt entry. */
2386 h
->plt
.refcount
+= 1;
2387 if (ELF32_R_TYPE (rel
->r_info
) != R_MICROBLAZE_64_PCREL
)
2388 h
->pointer_equality_needed
= 1;
2392 /* If we are creating a shared library, and this is a reloc
2393 against a global symbol, or a non PC relative reloc
2394 against a local symbol, then we need to copy the reloc
2395 into the shared library. However, if we are linking with
2396 -Bsymbolic, we do not need to copy a reloc against a
2397 global symbol which is defined in an object we are
2398 including in the link (i.e., DEF_REGULAR is set). At
2399 this point we have not seen all the input files, so it is
2400 possible that DEF_REGULAR is not set now but will be set
2401 later (it is never cleared). In case of a weak definition,
2402 DEF_REGULAR may be cleared later by a strong definition in
2403 a shared library. We account for that possibility below by
2404 storing information in the relocs_copied field of the hash
2405 table entry. A similar situation occurs when creating
2406 shared libraries and symbol visibility changes render the
2409 If on the other hand, we are creating an executable, we
2410 may need to keep relocations for symbols satisfied by a
2411 dynamic library if we manage to avoid copy relocs for the
2414 if ((bfd_link_pic (info
)
2415 && (sec
->flags
& SEC_ALLOC
) != 0
2416 && (r_type
!= R_MICROBLAZE_64_PCREL
2418 && (! info
->symbolic
2419 || h
->root
.type
== bfd_link_hash_defweak
2420 || !h
->def_regular
))))
2421 || (!bfd_link_pic (info
)
2422 && (sec
->flags
& SEC_ALLOC
) != 0
2424 && (h
->root
.type
== bfd_link_hash_defweak
2425 || !h
->def_regular
)))
2427 struct elf32_mb_dyn_relocs
*p
;
2428 struct elf32_mb_dyn_relocs
**head
;
2430 /* When creating a shared object, we must copy these
2431 relocs into the output file. We create a reloc
2432 section in dynobj and make room for the reloc. */
2438 if (htab
->elf
.dynobj
== NULL
)
2439 htab
->elf
.dynobj
= abfd
;
2440 dynobj
= htab
->elf
.dynobj
;
2442 sreloc
= _bfd_elf_make_dynamic_reloc_section (sec
, dynobj
,
2448 /* If this is a global symbol, we count the number of
2449 relocations we need for this symbol. */
2451 head
= &((struct elf32_mb_link_hash_entry
*) h
)->dyn_relocs
;
2454 /* Track dynamic relocs needed for local syms too.
2455 We really need local syms available to do this
2459 Elf_Internal_Sym
*isym
;
2462 isym
= bfd_sym_from_r_symndx (&htab
->sym_sec
,
2467 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2471 vpp
= &elf_section_data (s
)->local_dynrel
;
2472 head
= (struct elf32_mb_dyn_relocs
**) vpp
;
2476 if (p
== NULL
|| p
->sec
!= sec
)
2478 bfd_size_type amt
= sizeof *p
;
2479 p
= ((struct elf32_mb_dyn_relocs
*)
2480 bfd_alloc (htab
->elf
.dynobj
, amt
));
2491 if (r_type
== R_MICROBLAZE_64_PCREL
)
2502 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2505 microblaze_elf_copy_indirect_symbol (struct bfd_link_info
*info
,
2506 struct elf_link_hash_entry
*dir
,
2507 struct elf_link_hash_entry
*ind
)
2509 struct elf32_mb_link_hash_entry
*edir
, *eind
;
2511 edir
= (struct elf32_mb_link_hash_entry
*) dir
;
2512 eind
= (struct elf32_mb_link_hash_entry
*) ind
;
2514 if (eind
->dyn_relocs
!= NULL
)
2516 if (edir
->dyn_relocs
!= NULL
)
2518 struct elf32_mb_dyn_relocs
**pp
;
2519 struct elf32_mb_dyn_relocs
*p
;
2521 if (ind
->root
.type
== bfd_link_hash_indirect
)
2524 /* Add reloc counts against the weak sym to the strong sym
2525 list. Merge any entries against the same section. */
2526 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
2528 struct elf32_mb_dyn_relocs
*q
;
2530 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2531 if (q
->sec
== p
->sec
)
2533 q
->pc_count
+= p
->pc_count
;
2534 q
->count
+= p
->count
;
2541 *pp
= edir
->dyn_relocs
;
2544 edir
->dyn_relocs
= eind
->dyn_relocs
;
2545 eind
->dyn_relocs
= NULL
;
2548 edir
->tls_mask
|= eind
->tls_mask
;
2550 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2554 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2555 struct elf_link_hash_entry
*h
)
2557 struct elf32_mb_link_hash_table
*htab
;
2558 struct elf32_mb_link_hash_entry
* eh
;
2559 struct elf32_mb_dyn_relocs
*p
;
2561 unsigned int power_of_two
;
2563 htab
= elf32_mb_hash_table (info
);
2567 /* If this is a function, put it in the procedure linkage table. We
2568 will fill in the contents of the procedure linkage table later,
2569 when we know the address of the .got section. */
2570 if (h
->type
== STT_FUNC
2573 if (h
->plt
.refcount
<= 0
2574 || SYMBOL_CALLS_LOCAL (info
, h
)
2575 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2576 && h
->root
.type
== bfd_link_hash_undefweak
))
2578 /* This case can occur if we saw a PLT reloc in an input
2579 file, but the symbol was never referred to by a dynamic
2580 object, or if all references were garbage collected. In
2581 such a case, we don't actually need to build a procedure
2582 linkage table, and we can just do a PC32 reloc instead. */
2583 h
->plt
.offset
= (bfd_vma
) -1;
2590 /* It's possible that we incorrectly decided a .plt reloc was
2591 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
2592 check_relocs. We can't decide accurately between function and
2593 non-function syms in check-relocs; Objects loaded later in
2594 the link may change h->type. So fix it now. */
2595 h
->plt
.offset
= (bfd_vma
) -1;
2597 /* If this is a weak symbol, and there is a real definition, the
2598 processor independent code will have arranged for us to see the
2599 real definition first, and we can just use the same value. */
2600 if (h
->u
.weakdef
!= NULL
)
2602 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2603 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2604 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2605 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2609 /* This is a reference to a symbol defined by a dynamic object which
2610 is not a function. */
2612 /* If we are creating a shared library, we must presume that the
2613 only references to the symbol are via the global offset table.
2614 For such cases we need not do anything here; the relocations will
2615 be handled correctly by relocate_section. */
2616 if (bfd_link_pic (info
))
2619 /* If there are no references to this symbol that do not use the
2620 GOT, we don't need to generate a copy reloc. */
2621 if (!h
->non_got_ref
)
2624 /* If -z nocopyreloc was given, we won't generate them either. */
2625 if (info
->nocopyreloc
)
2631 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2632 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2634 s
= p
->sec
->output_section
;
2635 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2639 /* If we didn't find any dynamic relocs in read-only sections, then
2640 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2647 /* We must allocate the symbol in our .dynbss section, which will
2648 become part of the .bss section of the executable. There will be
2649 an entry for this symbol in the .dynsym section. The dynamic
2650 object will contain position independent code, so all references
2651 from the dynamic object to this symbol will go through the global
2652 offset table. The dynamic linker will use the .dynsym entry to
2653 determine the address it must put in the global offset table, so
2654 both the dynamic object and the regular object will refer to the
2655 same memory location for the variable. */
2657 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
2658 to copy the initial value out of the dynamic object and into the
2659 runtime process image. */
2660 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2662 s
= htab
->elf
.sdynrelro
;
2663 srel
= htab
->elf
.sreldynrelro
;
2667 s
= htab
->elf
.sdynbss
;
2668 srel
= htab
->elf
.srelbss
;
2670 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2672 srel
->size
+= sizeof (Elf32_External_Rela
);
2676 /* We need to figure out the alignment required for this symbol. I
2677 have no idea how ELF linkers handle this. */
2678 power_of_two
= bfd_log2 (h
->size
);
2679 if (power_of_two
> 3)
2682 /* Apply the required alignment. */
2683 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
2684 if (power_of_two
> s
->alignment_power
)
2686 if (!bfd_set_section_alignment (s
->owner
, s
, power_of_two
))
2690 /* Define the symbol as being at this point in the section. */
2691 h
->root
.u
.def
.section
= s
;
2692 h
->root
.u
.def
.value
= s
->size
;
2694 /* Increment the section size to make room for the symbol. */
2699 /* Allocate space in .plt, .got and associated reloc sections for
2703 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * dat
)
2705 struct bfd_link_info
*info
;
2706 struct elf32_mb_link_hash_table
*htab
;
2707 struct elf32_mb_link_hash_entry
*eh
;
2708 struct elf32_mb_dyn_relocs
*p
;
2710 if (h
->root
.type
== bfd_link_hash_indirect
)
2713 info
= (struct bfd_link_info
*) dat
;
2714 htab
= elf32_mb_hash_table (info
);
2718 if (htab
->elf
.dynamic_sections_created
2719 && h
->plt
.refcount
> 0)
2721 /* Make sure this symbol is output as a dynamic symbol.
2722 Undefined weak syms won't yet be marked as dynamic. */
2723 if (h
->dynindx
== -1
2724 && !h
->forced_local
)
2726 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2730 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), h
))
2732 asection
*s
= htab
->elf
.splt
;
2734 /* The first entry in .plt is reserved. */
2736 s
->size
= PLT_ENTRY_SIZE
;
2738 h
->plt
.offset
= s
->size
;
2740 /* If this symbol is not defined in a regular file, and we are
2741 not generating a shared library, then set the symbol to this
2742 location in the .plt. This is required to make function
2743 pointers compare as equal between the normal executable and
2744 the shared library. */
2745 if (! bfd_link_pic (info
)
2748 h
->root
.u
.def
.section
= s
;
2749 h
->root
.u
.def
.value
= h
->plt
.offset
;
2752 /* Make room for this entry. */
2753 s
->size
+= PLT_ENTRY_SIZE
;
2755 /* We also need to make an entry in the .got.plt section, which
2756 will be placed in the .got section by the linker script. */
2757 htab
->elf
.sgotplt
->size
+= 4;
2759 /* We also need to make an entry in the .rel.plt section. */
2760 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rela
);
2764 h
->plt
.offset
= (bfd_vma
) -1;
2770 h
->plt
.offset
= (bfd_vma
) -1;
2774 eh
= (struct elf32_mb_link_hash_entry
*) h
;
2775 if (h
->got
.refcount
> 0)
2780 /* Make sure this symbol is output as a dynamic symbol.
2781 Undefined weak syms won't yet be marked as dynamic. */
2782 if (h
->dynindx
== -1
2783 && !h
->forced_local
)
2785 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2790 if ((eh
->tls_mask
& TLS_TLS
) != 0)
2792 /* Handle TLS Symbol */
2793 if ((eh
->tls_mask
& TLS_LD
) != 0)
2795 if (!eh
->elf
.def_dynamic
)
2796 /* We'll just use htab->tlsld_got.offset. This should
2797 always be the case. It's a little odd if we have
2798 a local dynamic reloc against a non-local symbol. */
2799 htab
->tlsld_got
.refcount
+= 1;
2803 if ((eh
->tls_mask
& TLS_GD
) != 0)
2808 /* Regular (non-TLS) symbol */
2813 h
->got
.offset
= (bfd_vma
) -1;
2818 h
->got
.offset
= s
->size
;
2820 htab
->elf
.srelgot
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
2824 h
->got
.offset
= (bfd_vma
) -1;
2826 if (eh
->dyn_relocs
== NULL
)
2829 /* In the shared -Bsymbolic case, discard space allocated for
2830 dynamic pc-relative relocs against symbols which turn out to be
2831 defined in regular objects. For the normal shared case, discard
2832 space for pc-relative relocs that have become local due to symbol
2833 visibility changes. */
2835 if (bfd_link_pic (info
))
2841 struct elf32_mb_dyn_relocs
**pp
;
2843 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2845 p
->count
-= p
->pc_count
;
2856 /* For the non-shared case, discard space for relocs against
2857 symbols which turn out to need copy relocs or are not
2863 || (htab
->elf
.dynamic_sections_created
2864 && (h
->root
.type
== bfd_link_hash_undefweak
2865 || h
->root
.type
== bfd_link_hash_undefined
))))
2867 /* Make sure this symbol is output as a dynamic symbol.
2868 Undefined weak syms won't yet be marked as dynamic. */
2869 if (h
->dynindx
== -1
2870 && !h
->forced_local
)
2872 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2876 /* If that succeeded, we know we'll be keeping all the
2878 if (h
->dynindx
!= -1)
2882 eh
->dyn_relocs
= NULL
;
2887 /* Finally, allocate space. */
2888 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2890 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
2891 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2897 /* Set the sizes of the dynamic sections. */
2900 microblaze_elf_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2901 struct bfd_link_info
*info
)
2903 struct elf32_mb_link_hash_table
*htab
;
2908 htab
= elf32_mb_hash_table (info
);
2912 dynobj
= htab
->elf
.dynobj
;
2913 BFD_ASSERT (dynobj
!= NULL
);
2915 /* Set up .got offsets for local syms, and space for local dynamic
2917 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2919 bfd_signed_vma
*local_got
;
2920 bfd_signed_vma
*end_local_got
;
2921 bfd_size_type locsymcount
;
2922 Elf_Internal_Shdr
*symtab_hdr
;
2923 unsigned char *lgot_masks
;
2926 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
2929 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2931 struct elf32_mb_dyn_relocs
*p
;
2933 for (p
= ((struct elf32_mb_dyn_relocs
*)
2934 elf_section_data (s
)->local_dynrel
);
2938 if (!bfd_is_abs_section (p
->sec
)
2939 && bfd_is_abs_section (p
->sec
->output_section
))
2941 /* Input section has been discarded, either because
2942 it is a copy of a linkonce section or due to
2943 linker script /DISCARD/, so we'll be discarding
2946 else if (p
->count
!= 0)
2948 srel
= elf_section_data (p
->sec
)->sreloc
;
2949 srel
->size
+= p
->count
* sizeof (Elf32_External_Rela
);
2950 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2951 info
->flags
|= DF_TEXTREL
;
2956 local_got
= elf_local_got_refcounts (ibfd
);
2960 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2961 locsymcount
= symtab_hdr
->sh_info
;
2962 end_local_got
= local_got
+ locsymcount
;
2963 lgot_masks
= (unsigned char *) end_local_got
;
2965 srel
= htab
->elf
.srelgot
;
2967 for (; local_got
< end_local_got
; ++local_got
, ++lgot_masks
)
2971 unsigned int need
= 0;
2972 if ((*lgot_masks
& TLS_TLS
) != 0)
2974 if ((*lgot_masks
& TLS_GD
) != 0)
2976 if ((*lgot_masks
& TLS_LD
) != 0)
2977 htab
->tlsld_got
.refcount
+= 1;
2984 *local_got
= (bfd_vma
) -1;
2988 *local_got
= s
->size
;
2990 if (bfd_link_pic (info
))
2991 srel
->size
+= need
* (sizeof (Elf32_External_Rela
) / 4);
2995 *local_got
= (bfd_vma
) -1;
2999 /* Allocate global sym .plt and .got entries, and space for global
3000 sym dynamic relocs. */
3001 elf_link_hash_traverse (elf_hash_table (info
), allocate_dynrelocs
, info
);
3003 if (htab
->tlsld_got
.refcount
> 0)
3005 htab
->tlsld_got
.offset
= htab
->elf
.sgot
->size
;
3006 htab
->elf
.sgot
->size
+= 8;
3007 if (bfd_link_pic (info
))
3008 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rela
);
3011 htab
->tlsld_got
.offset
= (bfd_vma
) -1;
3013 if (elf_hash_table (info
)->dynamic_sections_created
)
3015 /* Make space for the trailing nop in .plt. */
3016 if (htab
->elf
.splt
->size
> 0)
3017 htab
->elf
.splt
->size
+= 4;
3020 /* The check_relocs and adjust_dynamic_symbol entry points have
3021 determined the sizes of the various dynamic sections. Allocate
3023 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3026 bfd_boolean strip
= FALSE
;
3028 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3031 /* It's OK to base decisions on the section name, because none
3032 of the dynobj section names depend upon the input files. */
3033 name
= bfd_get_section_name (dynobj
, s
);
3035 if (strncmp (name
, ".rela", 5) == 0)
3039 /* If we don't need this section, strip it from the
3040 output file. This is to handle .rela.bss and
3041 .rela.plt. We must create it in
3042 create_dynamic_sections, because it must be created
3043 before the linker maps input sections to output
3044 sections. The linker does that before
3045 adjust_dynamic_symbol is called, and it is that
3046 function which decides whether anything needs to go
3047 into these sections. */
3052 /* We use the reloc_count field as a counter if we need
3053 to copy relocs into the output file. */
3057 else if (s
!= htab
->elf
.splt
3058 && s
!= htab
->elf
.sgot
3059 && s
!= htab
->elf
.sgotplt
3060 && s
!= htab
->elf
.sdynbss
3061 && s
!= htab
->elf
.sdynrelro
)
3063 /* It's not one of our sections, so don't allocate space. */
3069 s
->flags
|= SEC_EXCLUDE
;
3073 /* Allocate memory for the section contents. */
3074 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
3075 Unused entries should be reclaimed before the section's contents
3076 are written out, but at the moment this does not happen. Thus in
3077 order to prevent writing out garbage, we initialise the section's
3078 contents to zero. */
3079 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3080 if (s
->contents
== NULL
&& s
->size
!= 0)
3084 if (elf_hash_table (info
)->dynamic_sections_created
)
3086 /* Add some entries to the .dynamic section. We fill in the
3087 values later, in microblaze_elf_finish_dynamic_sections, but we
3088 must add the entries now so that we get the correct size for
3089 the .dynamic section. The DT_DEBUG entry is filled in by the
3090 dynamic linker and used by the debugger. */
3091 #define add_dynamic_entry(TAG, VAL) \
3092 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3094 if (bfd_link_executable (info
))
3096 if (!add_dynamic_entry (DT_DEBUG
, 0))
3100 if (!add_dynamic_entry (DT_RELA
, 0)
3101 || !add_dynamic_entry (DT_RELASZ
, 0)
3102 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf32_External_Rela
)))
3105 if (htab
->elf
.splt
->size
!= 0)
3107 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3108 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3109 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3110 || !add_dynamic_entry (DT_JMPREL
, 0)
3111 || !add_dynamic_entry (DT_BIND_NOW
, 1))
3115 if (info
->flags
& DF_TEXTREL
)
3117 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3121 #undef add_dynamic_entry
3125 /* Finish up dynamic symbol handling. We set the contents of various
3126 dynamic sections here. */
3129 microblaze_elf_finish_dynamic_symbol (bfd
*output_bfd
,
3130 struct bfd_link_info
*info
,
3131 struct elf_link_hash_entry
*h
,
3132 Elf_Internal_Sym
*sym
)
3134 struct elf32_mb_link_hash_table
*htab
;
3135 struct elf32_mb_link_hash_entry
*eh
= elf32_mb_hash_entry(h
);
3137 htab
= elf32_mb_hash_table (info
);
3141 if (h
->plt
.offset
!= (bfd_vma
) -1)
3146 Elf_Internal_Rela rela
;
3152 /* This symbol has an entry in the procedure linkage table. Set
3154 BFD_ASSERT (h
->dynindx
!= -1);
3156 splt
= htab
->elf
.splt
;
3157 srela
= htab
->elf
.srelplt
;
3158 sgotplt
= htab
->elf
.sgotplt
;
3159 BFD_ASSERT (splt
!= NULL
&& srela
!= NULL
&& sgotplt
!= NULL
);
3161 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1; /* first entry reserved. */
3162 got_offset
= (plt_index
+ 3) * 4; /* 3 reserved ??? */
3163 got_addr
= got_offset
;
3165 /* For non-PIC objects we need absolute address of the GOT entry. */
3166 if (!bfd_link_pic (info
))
3167 got_addr
+= sgotplt
->output_section
->vma
+ sgotplt
->output_offset
;
3169 /* Fill in the entry in the procedure linkage table. */
3170 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_0
+ ((got_addr
>> 16) & 0xffff),
3171 splt
->contents
+ h
->plt
.offset
);
3172 if (bfd_link_pic (info
))
3173 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1
+ (got_addr
& 0xffff),
3174 splt
->contents
+ h
->plt
.offset
+ 4);
3176 bfd_put_32 (output_bfd
, PLT_ENTRY_WORD_1_NOPIC
+ (got_addr
& 0xffff),
3177 splt
->contents
+ h
->plt
.offset
+ 4);
3178 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_2
,
3179 splt
->contents
+ h
->plt
.offset
+ 8);
3180 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD_3
,
3181 splt
->contents
+ h
->plt
.offset
+ 12);
3183 /* Any additions to the .got section??? */
3184 /* bfd_put_32 (output_bfd,
3185 splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
3186 sgotplt->contents + got_offset); */
3188 /* Fill in the entry in the .rela.plt section. */
3189 rela
.r_offset
= (sgotplt
->output_section
->vma
3190 + sgotplt
->output_offset
3192 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_JUMP_SLOT
);
3194 loc
= srela
->contents
;
3195 loc
+= plt_index
* sizeof (Elf32_External_Rela
);
3196 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3198 if (!h
->def_regular
)
3200 /* Mark the symbol as undefined, rather than as defined in
3201 the .plt section. Zero the value. */
3202 sym
->st_shndx
= SHN_UNDEF
;
3207 /* h->got.refcount to be checked ? */
3208 if (h
->got
.offset
!= (bfd_vma
) -1 &&
3209 ! ((h
->got
.offset
& 1) ||
3210 IS_TLS_LD(eh
->tls_mask
) || IS_TLS_GD(eh
->tls_mask
)))
3216 /* This symbol has an entry in the global offset table. Set it
3219 sgot
= htab
->elf
.sgot
;
3220 srela
= htab
->elf
.srelgot
;
3221 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
3223 offset
= (sgot
->output_section
->vma
+ sgot
->output_offset
3224 + (h
->got
.offset
&~ (bfd_vma
) 1));
3226 /* If this is a -Bsymbolic link, and the symbol is defined
3227 locally, we just want to emit a RELATIVE reloc. Likewise if
3228 the symbol was forced to be local because of a version file.
3229 The entry in the global offset table will already have been
3230 initialized in the relocate_section function. */
3231 if (bfd_link_pic (info
)
3232 && ((info
->symbolic
&& h
->def_regular
)
3233 || h
->dynindx
== -1))
3235 asection
*sec
= h
->root
.u
.def
.section
;
3236 microblaze_elf_output_dynamic_relocation (output_bfd
,
3237 srela
, srela
->reloc_count
++,
3239 R_MICROBLAZE_REL
, offset
,
3241 + sec
->output_section
->vma
3242 + sec
->output_offset
);
3246 microblaze_elf_output_dynamic_relocation (output_bfd
,
3247 srela
, srela
->reloc_count
++,
3249 R_MICROBLAZE_GLOB_DAT
,
3253 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3254 sgot
->contents
+ (h
->got
.offset
&~ (bfd_vma
) 1));
3260 Elf_Internal_Rela rela
;
3263 /* This symbols needs a copy reloc. Set it up. */
3265 BFD_ASSERT (h
->dynindx
!= -1);
3267 rela
.r_offset
= (h
->root
.u
.def
.value
3268 + h
->root
.u
.def
.section
->output_section
->vma
3269 + h
->root
.u
.def
.section
->output_offset
);
3270 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_MICROBLAZE_COPY
);
3272 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
3273 s
= htab
->elf
.sreldynrelro
;
3275 s
= htab
->elf
.srelbss
;
3276 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3277 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
3280 /* Mark some specially defined symbols as absolute. */
3281 if (h
== htab
->elf
.hdynamic
3282 || h
== htab
->elf
.hgot
3283 || h
== htab
->elf
.hplt
)
3284 sym
->st_shndx
= SHN_ABS
;
3290 /* Finish up the dynamic sections. */
3293 microblaze_elf_finish_dynamic_sections (bfd
*output_bfd
,
3294 struct bfd_link_info
*info
)
3297 asection
*sdyn
, *sgot
;
3298 struct elf32_mb_link_hash_table
*htab
;
3300 htab
= elf32_mb_hash_table (info
);
3304 dynobj
= htab
->elf
.dynobj
;
3306 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3308 if (htab
->elf
.dynamic_sections_created
)
3311 Elf32_External_Dyn
*dyncon
, *dynconend
;
3313 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3314 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3315 for (; dyncon
< dynconend
; dyncon
++)
3317 Elf_Internal_Dyn dyn
;
3321 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3326 s
= htab
->elf
.sgotplt
;
3331 s
= htab
->elf
.srelplt
;
3336 s
= htab
->elf
.srelplt
;
3349 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3351 dyn
.d_un
.d_val
= s
->size
;
3353 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3356 splt
= htab
->elf
.splt
;
3357 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
3359 /* Clear the first entry in the procedure linkage table,
3360 and put a nop in the last four bytes. */
3363 memset (splt
->contents
, 0, PLT_ENTRY_SIZE
);
3364 bfd_put_32 (output_bfd
, (bfd_vma
) 0x80000000 /* nop. */,
3365 splt
->contents
+ splt
->size
- 4);
3368 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
= 4;
3371 /* Set the first entry in the global offset table to the address of
3372 the dynamic section. */
3373 sgot
= htab
->elf
.sgotplt
;
3374 if (sgot
&& sgot
->size
> 0)
3377 bfd_put_32 (output_bfd
, (bfd_vma
) 0, sgot
->contents
);
3379 bfd_put_32 (output_bfd
,
3380 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
3382 elf_section_data (sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3385 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
3386 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3391 /* Hook called by the linker routine which adds symbols from an object
3392 file. We use it to put .comm items in .sbss, and not .bss. */
3395 microblaze_elf_add_symbol_hook (bfd
*abfd
,
3396 struct bfd_link_info
*info
,
3397 Elf_Internal_Sym
*sym
,
3398 const char **namep ATTRIBUTE_UNUSED
,
3399 flagword
*flagsp ATTRIBUTE_UNUSED
,
3403 if (sym
->st_shndx
== SHN_COMMON
3404 && !bfd_link_relocatable (info
)
3405 && sym
->st_size
<= elf_gp_size (abfd
))
3407 /* Common symbols less than or equal to -G nn bytes are automatically
3409 *secp
= bfd_make_section_old_way (abfd
, ".sbss");
3411 || ! bfd_set_section_flags (abfd
, *secp
, SEC_IS_COMMON
))
3414 *valp
= sym
->st_size
;
3420 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec
3421 #define TARGET_LITTLE_NAME "elf32-microblazeel"
3423 #define TARGET_BIG_SYM microblaze_elf32_vec
3424 #define TARGET_BIG_NAME "elf32-microblaze"
3426 #define ELF_ARCH bfd_arch_microblaze
3427 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA
3428 #define ELF_MACHINE_CODE EM_MICROBLAZE
3429 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
3430 #define ELF_MAXPAGESIZE 0x1000
3431 #define elf_info_to_howto microblaze_elf_info_to_howto
3432 #define elf_info_to_howto_rel NULL
3434 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
3435 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
3436 #define elf_backend_relocate_section microblaze_elf_relocate_section
3437 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
3438 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
3439 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
3441 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
3442 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
3443 #define elf_backend_check_relocs microblaze_elf_check_relocs
3444 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
3445 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
3446 #define elf_backend_can_gc_sections 1
3447 #define elf_backend_can_refcount 1
3448 #define elf_backend_want_got_plt 1
3449 #define elf_backend_plt_readonly 1
3450 #define elf_backend_got_header_size 12
3451 #define elf_backend_want_dynrelro 1
3452 #define elf_backend_rela_normal 1
3453 #define elf_backend_dtrel_excludes_plt 1
3455 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
3456 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3457 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
3458 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
3459 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
3460 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
3462 #include "elf32-target.h"