1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2020 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
28 #include "elf32-bfin.h"
30 /* FUNCTION : bfin_pltpc_reloc
31 ABSTRACT : TODO : figure out how to handle pltpc relocs. */
32 static bfd_reloc_status_type
34 bfd
*abfd ATTRIBUTE_UNUSED
,
35 arelent
*reloc_entry ATTRIBUTE_UNUSED
,
36 asymbol
*symbol ATTRIBUTE_UNUSED
,
37 void * data ATTRIBUTE_UNUSED
,
38 asection
*input_section ATTRIBUTE_UNUSED
,
39 bfd
*output_bfd ATTRIBUTE_UNUSED
,
40 char **error_message ATTRIBUTE_UNUSED
)
42 bfd_reloc_status_type flag
= bfd_reloc_ok
;
47 static bfd_reloc_status_type
48 bfin_pcrel24_reloc (bfd
*abfd
,
52 asection
*input_section
,
54 char **error_message ATTRIBUTE_UNUSED
)
57 bfd_size_type addr
= reloc_entry
->address
;
58 bfd_vma output_base
= 0;
59 reloc_howto_type
*howto
= reloc_entry
->howto
;
60 asection
*output_section
;
61 bfd_boolean relocatable
= (output_bfd
!= NULL
);
63 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
64 return bfd_reloc_outofrange
;
66 if (bfd_is_und_section (symbol
->section
)
67 && (symbol
->flags
& BSF_WEAK
) == 0
69 return bfd_reloc_undefined
;
71 if (bfd_is_com_section (symbol
->section
))
74 relocation
= symbol
->value
;
76 output_section
= symbol
->section
->output_section
;
81 output_base
= output_section
->vma
;
83 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
84 relocation
+= output_base
+ symbol
->section
->output_offset
;
86 if (!relocatable
&& !strcmp (symbol
->name
, symbol
->section
->name
))
87 relocation
+= reloc_entry
->addend
;
89 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
90 relocation
-= reloc_entry
->address
;
92 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
94 bfd_reloc_status_type status
;
95 status
= bfd_check_overflow (howto
->complain_on_overflow
,
98 bfd_arch_bits_per_address(abfd
),
100 if (status
!= bfd_reloc_ok
)
104 /* if rightshift is 1 and the number odd, return error. */
105 if (howto
->rightshift
&& (relocation
& 0x01))
107 _bfd_error_handler (_("relocation should be even number"));
108 return bfd_reloc_overflow
;
111 relocation
>>= (bfd_vma
) howto
->rightshift
;
112 /* Shift everything up to where it's going to be used. */
114 relocation
<<= (bfd_vma
) howto
->bitpos
;
118 reloc_entry
->address
+= input_section
->output_offset
;
119 reloc_entry
->addend
+= symbol
->section
->output_offset
;
125 /* We are getting reloc_entry->address 2 byte off from
126 the start of instruction. Assuming absolute postion
127 of the reloc data. But, following code had been written assuming
128 reloc address is starting at begining of instruction.
129 To compensate that I have increased the value of
130 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
133 x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
- 2);
134 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
135 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
- 2);
137 x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
);
138 x
= relocation
& 0xFFFF;
139 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
);
144 static bfd_reloc_status_type
145 bfin_imm16_reloc (bfd
*abfd
,
146 arelent
*reloc_entry
,
149 asection
*input_section
,
151 char **error_message ATTRIBUTE_UNUSED
)
153 bfd_vma relocation
, x
;
154 bfd_size_type reloc_addr
= reloc_entry
->address
;
155 bfd_vma output_base
= 0;
156 reloc_howto_type
*howto
= reloc_entry
->howto
;
157 asection
*output_section
;
158 bfd_boolean relocatable
= (output_bfd
!= NULL
);
160 /* Is the address of the relocation really within the section? */
161 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
162 return bfd_reloc_outofrange
;
164 if (bfd_is_und_section (symbol
->section
)
165 && (symbol
->flags
& BSF_WEAK
) == 0
167 return bfd_reloc_undefined
;
169 output_section
= symbol
->section
->output_section
;
170 relocation
= symbol
->value
;
172 /* Convert input-section-relative symbol value to absolute. */
176 output_base
= output_section
->vma
;
178 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
179 relocation
+= output_base
+ symbol
->section
->output_offset
;
181 /* Add in supplied addend. */
182 relocation
+= reloc_entry
->addend
;
186 reloc_entry
->address
+= input_section
->output_offset
;
187 reloc_entry
->addend
+= symbol
->section
->output_offset
;
191 reloc_entry
->addend
= 0;
194 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
196 bfd_reloc_status_type flag
;
197 flag
= bfd_check_overflow (howto
->complain_on_overflow
,
200 bfd_arch_bits_per_address(abfd
),
202 if (flag
!= bfd_reloc_ok
)
206 /* Here the variable relocation holds the final address of the
207 symbol we are relocating against, plus any addend. */
209 relocation
>>= (bfd_vma
) howto
->rightshift
;
211 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ reloc_addr
);
216 static bfd_reloc_status_type
217 bfin_byte4_reloc (bfd
*abfd
,
218 arelent
*reloc_entry
,
221 asection
*input_section
,
223 char **error_message ATTRIBUTE_UNUSED
)
225 bfd_vma relocation
, x
;
226 bfd_size_type addr
= reloc_entry
->address
;
227 bfd_vma output_base
= 0;
228 asection
*output_section
;
229 bfd_boolean relocatable
= (output_bfd
!= NULL
);
231 /* Is the address of the relocation really within the section? */
232 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
233 return bfd_reloc_outofrange
;
235 if (bfd_is_und_section (symbol
->section
)
236 && (symbol
->flags
& BSF_WEAK
) == 0
238 return bfd_reloc_undefined
;
240 output_section
= symbol
->section
->output_section
;
241 relocation
= symbol
->value
;
242 /* Convert input-section-relative symbol value to absolute. */
246 output_base
= output_section
->vma
;
249 && symbol
->section
->name
250 && !strcmp (symbol
->name
, symbol
->section
->name
))
253 relocation
+= output_base
+ symbol
->section
->output_offset
;
256 relocation
+= reloc_entry
->addend
;
260 /* This output will be relocatable ... like ld -r. */
261 reloc_entry
->address
+= input_section
->output_offset
;
262 reloc_entry
->addend
+= symbol
->section
->output_offset
;
266 reloc_entry
->addend
= 0;
269 /* Here the variable relocation holds the final address of the
270 symbol we are relocating against, plus any addend. */
271 x
= relocation
& 0xFFFF0000;
273 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
+ 2);
275 x
= relocation
& 0x0000FFFF;
276 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
);
280 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
281 Use this instead of bfd_perform_relocation. */
282 static bfd_reloc_status_type
283 bfin_bfd_reloc (bfd
*abfd
,
284 arelent
*reloc_entry
,
287 asection
*input_section
,
289 char **error_message ATTRIBUTE_UNUSED
)
292 bfd_size_type addr
= reloc_entry
->address
;
293 bfd_vma output_base
= 0;
294 reloc_howto_type
*howto
= reloc_entry
->howto
;
295 asection
*output_section
;
296 bfd_boolean relocatable
= (output_bfd
!= NULL
);
298 /* Is the address of the relocation really within the section? */
299 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
300 return bfd_reloc_outofrange
;
302 if (bfd_is_und_section (symbol
->section
)
303 && (symbol
->flags
& BSF_WEAK
) == 0
305 return bfd_reloc_undefined
;
307 /* Get symbol value. (Common symbols are special.) */
308 if (bfd_is_com_section (symbol
->section
))
311 relocation
= symbol
->value
;
313 output_section
= symbol
->section
->output_section
;
315 /* Convert input-section-relative symbol value to absolute. */
319 output_base
= output_section
->vma
;
321 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
322 relocation
+= output_base
+ symbol
->section
->output_offset
;
324 if (!relocatable
&& !strcmp (symbol
->name
, symbol
->section
->name
))
326 /* Add in supplied addend. */
327 relocation
+= reloc_entry
->addend
;
330 /* Here the variable relocation holds the final address of the
331 symbol we are relocating against, plus any addend. */
333 if (howto
->pc_relative
)
335 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
337 if (howto
->pcrel_offset
)
338 relocation
-= reloc_entry
->address
;
343 reloc_entry
->address
+= input_section
->output_offset
;
344 reloc_entry
->addend
+= symbol
->section
->output_offset
;
347 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
349 bfd_reloc_status_type status
;
351 status
= bfd_check_overflow (howto
->complain_on_overflow
,
354 bfd_arch_bits_per_address(abfd
),
356 if (status
!= bfd_reloc_ok
)
360 /* If rightshift is 1 and the number odd, return error. */
361 if (howto
->rightshift
&& (relocation
& 0x01))
363 _bfd_error_handler (_("relocation should be even number"));
364 return bfd_reloc_overflow
;
367 relocation
>>= (bfd_vma
) howto
->rightshift
;
369 /* Shift everything up to where it's going to be used. */
371 relocation
<<= (bfd_vma
) howto
->bitpos
;
374 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
376 /* handle 8 and 16 bit relocations here. */
381 char x
= bfd_get_8 (abfd
, (char *) data
+ addr
);
383 bfd_put_8 (abfd
, x
, (unsigned char *) data
+ addr
);
389 unsigned short x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
);
391 bfd_put_16 (abfd
, (bfd_vma
) x
, (unsigned char *) data
+ addr
);
396 return bfd_reloc_other
;
402 /* HOWTO Table for blackfin.
403 Blackfin relocations are fairly complicated.
404 Some of the salient features are
405 a. Even numbered offsets. A number of (not all) relocations are
406 even numbered. This means that the rightmost bit is not stored.
407 Needs to right shift by 1 and check to see if value is not odd
408 b. A relocation can be an expression. An expression takes on
409 a variety of relocations arranged in a stack.
410 As a result, we cannot use the standard generic function as special
411 function. We will have our own, which is very similar to the standard
412 generic function except that it understands how to get the value from
413 the relocation stack. . */
415 #define BFIN_RELOC_MIN 0
416 #define BFIN_RELOC_MAX 0x21
417 #define BFIN_GNUEXT_RELOC_MIN 0x40
418 #define BFIN_GNUEXT_RELOC_MAX 0x43
419 #define BFIN_ARELOC_MIN 0xE0
420 #define BFIN_ARELOC_MAX 0xF3
422 static reloc_howto_type bfin_howto_table
[] =
424 /* This reloc does nothing. . */
425 HOWTO (R_BFIN_UNUSED0
, /* type. */
427 3, /* size (0 = byte, 1 = short, 2 = long). */
429 FALSE
, /* pc_relative. */
431 complain_overflow_dont
, /* complain_on_overflow. */
432 bfd_elf_generic_reloc
, /* special_function. */
433 "R_BFIN_UNUSED0", /* name. */
434 FALSE
, /* partial_inplace. */
437 FALSE
), /* pcrel_offset. */
439 HOWTO (R_BFIN_PCREL5M2
, /* type. */
441 1, /* size (0 = byte, 1 = short, 2 = long).. */
443 TRUE
, /* pc_relative. */
445 complain_overflow_unsigned
, /* complain_on_overflow. */
446 bfin_bfd_reloc
, /* special_function. */
447 "R_BFIN_PCREL5M2", /* name. */
448 FALSE
, /* partial_inplace. */
450 0x0000000F, /* dst_mask. */
451 FALSE
), /* pcrel_offset. */
453 HOWTO (R_BFIN_UNUSED1
, /* type. */
455 3, /* 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_BFIN_UNUSED1", /* name. */
462 FALSE
, /* partial_inplace. */
465 FALSE
), /* pcrel_offset. */
467 HOWTO (R_BFIN_PCREL10
, /* type. */
469 1, /* size (0 = byte, 1 = short, 2 = long). */
471 TRUE
, /* pc_relative. */
473 complain_overflow_signed
, /* complain_on_overflow. */
474 bfin_bfd_reloc
, /* special_function. */
475 "R_BFIN_PCREL10", /* name. */
476 FALSE
, /* partial_inplace. */
478 0x000003FF, /* dst_mask. */
479 TRUE
), /* pcrel_offset. */
481 HOWTO (R_BFIN_PCREL12_JUMP
, /* type. */
483 /* the offset is actually 13 bit
484 aligned on a word boundary so
485 only 12 bits have to be used.
486 Right shift the rightmost bit.. */
487 1, /* size (0 = byte, 1 = short, 2 = long). */
489 TRUE
, /* pc_relative. */
491 complain_overflow_signed
, /* complain_on_overflow. */
492 bfin_bfd_reloc
, /* special_function. */
493 "R_BFIN_PCREL12_JUMP", /* name. */
494 FALSE
, /* partial_inplace. */
496 0x0FFF, /* dst_mask. */
497 TRUE
), /* pcrel_offset. */
499 HOWTO (R_BFIN_RIMM16
, /* type. */
501 1, /* size (0 = byte, 1 = short, 2 = long). */
503 FALSE
, /* pc_relative. */
505 complain_overflow_signed
, /* complain_on_overflow. */
506 bfin_imm16_reloc
, /* special_function. */
507 "R_BFIN_RIMM16", /* name. */
508 FALSE
, /* partial_inplace. */
510 0x0000FFFF, /* dst_mask. */
511 TRUE
), /* pcrel_offset. */
513 HOWTO (R_BFIN_LUIMM16
, /* type. */
515 1, /* size (0 = byte, 1 = short, 2 = long). */
517 FALSE
, /* pc_relative. */
519 complain_overflow_dont
, /* complain_on_overflow. */
520 bfin_imm16_reloc
, /* special_function. */
521 "R_BFIN_LUIMM16", /* name. */
522 FALSE
, /* partial_inplace. */
524 0x0000FFFF, /* dst_mask. */
525 TRUE
), /* pcrel_offset. */
527 HOWTO (R_BFIN_HUIMM16
, /* type. */
528 16, /* rightshift. */
529 1, /* size (0 = byte, 1 = short, 2 = long). */
531 FALSE
, /* pc_relative. */
533 complain_overflow_unsigned
, /* complain_on_overflow. */
534 bfin_imm16_reloc
, /* special_function. */
535 "R_BFIN_HUIMM16", /* name. */
536 FALSE
, /* partial_inplace. */
538 0x0000FFFF, /* dst_mask. */
539 TRUE
), /* pcrel_offset. */
541 HOWTO (R_BFIN_PCREL12_JUMP_S
, /* type. */
543 1, /* size (0 = byte, 1 = short, 2 = long). */
545 TRUE
, /* pc_relative. */
547 complain_overflow_signed
, /* complain_on_overflow. */
548 bfin_bfd_reloc
, /* special_function. */
549 "R_BFIN_PCREL12_JUMP_S", /* name. */
550 FALSE
, /* partial_inplace. */
552 0x00000FFF, /* dst_mask. */
553 TRUE
), /* pcrel_offset. */
555 HOWTO (R_BFIN_PCREL24_JUMP_X
, /* type. */
557 2, /* size (0 = byte, 1 = short, 2 = long). */
559 TRUE
, /* pc_relative. */
561 complain_overflow_signed
, /* complain_on_overflow. */
562 bfin_pcrel24_reloc
, /* special_function. */
563 "R_BFIN_PCREL24_JUMP_X", /* name. */
564 FALSE
, /* partial_inplace. */
566 0x00FFFFFF, /* dst_mask. */
567 TRUE
), /* pcrel_offset. */
569 HOWTO (R_BFIN_PCREL24
, /* type. */
571 2, /* size (0 = byte, 1 = short, 2 = long). */
573 TRUE
, /* pc_relative. */
575 complain_overflow_signed
, /* complain_on_overflow. */
576 bfin_pcrel24_reloc
, /* special_function. */
577 "R_BFIN_PCREL24", /* name. */
578 FALSE
, /* partial_inplace. */
580 0x00FFFFFF, /* dst_mask. */
581 TRUE
), /* pcrel_offset. */
583 HOWTO (R_BFIN_UNUSEDB
, /* type. */
585 3, /* size (0 = byte, 1 = short, 2 = long). */
587 FALSE
, /* pc_relative. */
589 complain_overflow_dont
, /* complain_on_overflow. */
590 bfd_elf_generic_reloc
, /* special_function. */
591 "R_BFIN_UNUSEDB", /* name. */
592 FALSE
, /* partial_inplace. */
595 FALSE
), /* pcrel_offset. */
597 HOWTO (R_BFIN_UNUSEDC
, /* type. */
599 3, /* size (0 = byte, 1 = short, 2 = long). */
601 FALSE
, /* pc_relative. */
603 complain_overflow_dont
, /* complain_on_overflow. */
604 bfd_elf_generic_reloc
, /* special_function. */
605 "R_BFIN_UNUSEDC", /* name. */
606 FALSE
, /* partial_inplace. */
609 FALSE
), /* pcrel_offset. */
611 HOWTO (R_BFIN_PCREL24_JUMP_L
, /* type. */
613 2, /* size (0 = byte, 1 = short, 2 = long). */
615 TRUE
, /* pc_relative. */
617 complain_overflow_signed
, /* complain_on_overflow. */
618 bfin_pcrel24_reloc
, /* special_function. */
619 "R_BFIN_PCREL24_JUMP_L", /* name. */
620 FALSE
, /* partial_inplace. */
622 0x00FFFFFF, /* dst_mask. */
623 TRUE
), /* pcrel_offset. */
625 HOWTO (R_BFIN_PCREL24_CALL_X
, /* type. */
627 2, /* size (0 = byte, 1 = short, 2 = long). */
629 TRUE
, /* pc_relative. */
631 complain_overflow_signed
, /* complain_on_overflow. */
632 bfin_pcrel24_reloc
, /* special_function. */
633 "R_BFIN_PCREL24_CALL_X", /* name. */
634 FALSE
, /* partial_inplace. */
636 0x00FFFFFF, /* dst_mask. */
637 TRUE
), /* pcrel_offset. */
639 HOWTO (R_BFIN_VAR_EQ_SYMB
, /* type. */
641 2, /* size (0 = byte, 1 = short, 2 = long). */
643 FALSE
, /* pc_relative. */
645 complain_overflow_bitfield
, /* complain_on_overflow. */
646 bfin_bfd_reloc
, /* special_function. */
647 "R_BFIN_VAR_EQ_SYMB", /* name. */
648 FALSE
, /* partial_inplace. */
651 FALSE
), /* pcrel_offset. */
653 HOWTO (R_BFIN_BYTE_DATA
, /* type. */
655 0, /* size (0 = byte, 1 = short, 2 = long). */
657 FALSE
, /* pc_relative. */
659 complain_overflow_unsigned
, /* complain_on_overflow. */
660 bfin_bfd_reloc
, /* special_function. */
661 "R_BFIN_BYTE_DATA", /* name. */
662 FALSE
, /* partial_inplace. */
664 0xFF, /* dst_mask. */
665 TRUE
), /* pcrel_offset. */
667 HOWTO (R_BFIN_BYTE2_DATA
, /* type. */
669 1, /* size (0 = byte, 1 = short, 2 = long). */
671 FALSE
, /* pc_relative. */
673 complain_overflow_signed
, /* complain_on_overflow. */
674 bfin_bfd_reloc
, /* special_function. */
675 "R_BFIN_BYTE2_DATA", /* name. */
676 FALSE
, /* partial_inplace. */
678 0xFFFF, /* dst_mask. */
679 TRUE
), /* pcrel_offset. */
681 HOWTO (R_BFIN_BYTE4_DATA
, /* type. */
683 2, /* size (0 = byte, 1 = short, 2 = long). */
685 FALSE
, /* pc_relative. */
687 complain_overflow_unsigned
, /* complain_on_overflow. */
688 bfin_byte4_reloc
, /* special_function. */
689 "R_BFIN_BYTE4_DATA", /* name. */
690 FALSE
, /* partial_inplace. */
692 0xFFFFFFFF, /* dst_mask. */
693 TRUE
), /* pcrel_offset. */
695 HOWTO (R_BFIN_PCREL11
, /* type. */
697 1, /* size (0 = byte, 1 = short, 2 = long). */
699 TRUE
, /* pc_relative. */
701 complain_overflow_unsigned
, /* complain_on_overflow. */
702 bfin_bfd_reloc
, /* special_function. */
703 "R_BFIN_PCREL11", /* name. */
704 FALSE
, /* partial_inplace. */
706 0x000003FF, /* dst_mask. */
707 FALSE
), /* pcrel_offset. */
710 /* A 18-bit signed operand with the GOT offset for the address of
712 HOWTO (R_BFIN_GOT17M4
, /* type */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
716 FALSE
, /* pc_relative */
718 complain_overflow_signed
, /* complain_on_overflow */
719 bfd_elf_generic_reloc
, /* special_function */
720 "R_BFIN_GOT17M4", /* name */
721 FALSE
, /* partial_inplace */
722 0xffff, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE
), /* pcrel_offset */
726 /* The upper 16 bits of the GOT offset for the address of the
728 HOWTO (R_BFIN_GOTHI
, /* type */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
732 FALSE
, /* pc_relative */
734 complain_overflow_dont
, /* complain_on_overflow */
735 bfd_elf_generic_reloc
, /* special_function */
736 "R_BFIN_GOTHI", /* name */
737 FALSE
, /* partial_inplace */
738 0xffff, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE
), /* pcrel_offset */
742 /* The lower 16 bits of the GOT offset for the address of the
744 HOWTO (R_BFIN_GOTLO
, /* type */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
748 FALSE
, /* pc_relative */
750 complain_overflow_dont
, /* complain_on_overflow */
751 bfd_elf_generic_reloc
, /* special_function */
752 "R_BFIN_GOTLO", /* name */
753 FALSE
, /* partial_inplace */
754 0xffff, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE
), /* pcrel_offset */
758 /* The 32-bit address of the canonical descriptor of a function. */
759 HOWTO (R_BFIN_FUNCDESC
, /* type */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
763 FALSE
, /* pc_relative */
765 complain_overflow_bitfield
, /* complain_on_overflow */
766 bfd_elf_generic_reloc
, /* special_function */
767 "R_BFIN_FUNCDESC", /* name */
768 FALSE
, /* partial_inplace */
769 0xffffffff, /* src_mask */
770 0xffffffff, /* dst_mask */
771 FALSE
), /* pcrel_offset */
773 /* A 12-bit signed operand with the GOT offset for the address of
774 canonical descriptor of a function. */
775 HOWTO (R_BFIN_FUNCDESC_GOT17M4
, /* type */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
779 FALSE
, /* pc_relative */
781 complain_overflow_signed
, /* complain_on_overflow */
782 bfd_elf_generic_reloc
, /* special_function */
783 "R_BFIN_FUNCDESC_GOT17M4", /* name */
784 FALSE
, /* partial_inplace */
785 0xffff, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE
), /* pcrel_offset */
789 /* The upper 16 bits of the GOT offset for the address of the
790 canonical descriptor of a function. */
791 HOWTO (R_BFIN_FUNCDESC_GOTHI
, /* type */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
795 FALSE
, /* pc_relative */
797 complain_overflow_dont
, /* complain_on_overflow */
798 bfd_elf_generic_reloc
, /* special_function */
799 "R_BFIN_FUNCDESC_GOTHI", /* name */
800 FALSE
, /* partial_inplace */
801 0xffff, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE
), /* pcrel_offset */
805 /* The lower 16 bits of the GOT offset for the address of the
806 canonical descriptor of a function. */
807 HOWTO (R_BFIN_FUNCDESC_GOTLO
, /* type */
809 1, /* size (0 = byte, 1 = short, 2 = long) */
811 FALSE
, /* pc_relative */
813 complain_overflow_dont
, /* complain_on_overflow */
814 bfd_elf_generic_reloc
, /* special_function */
815 "R_BFIN_FUNCDESC_GOTLO", /* name */
816 FALSE
, /* partial_inplace */
817 0xffff, /* src_mask */
818 0xffff, /* dst_mask */
819 FALSE
), /* pcrel_offset */
821 /* The 32-bit address of the canonical descriptor of a function. */
822 HOWTO (R_BFIN_FUNCDESC_VALUE
, /* type */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
826 FALSE
, /* pc_relative */
828 complain_overflow_bitfield
, /* complain_on_overflow */
829 bfd_elf_generic_reloc
, /* special_function */
830 "R_BFIN_FUNCDESC_VALUE", /* name */
831 FALSE
, /* partial_inplace */
832 0xffffffff, /* src_mask */
833 0xffffffff, /* dst_mask */
834 FALSE
), /* pcrel_offset */
836 /* A 12-bit signed operand with the GOT offset for the address of
837 canonical descriptor of a function. */
838 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4
, /* type */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
842 FALSE
, /* pc_relative */
844 complain_overflow_signed
, /* complain_on_overflow */
845 bfd_elf_generic_reloc
, /* special_function */
846 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
847 FALSE
, /* partial_inplace */
848 0xffff, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE
), /* pcrel_offset */
852 /* The upper 16 bits of the GOT offset for the address of the
853 canonical descriptor of a function. */
854 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI
, /* type */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
858 FALSE
, /* pc_relative */
860 complain_overflow_dont
, /* complain_on_overflow */
861 bfd_elf_generic_reloc
, /* special_function */
862 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
863 FALSE
, /* partial_inplace */
864 0xffff, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE
), /* pcrel_offset */
868 /* The lower 16 bits of the GOT offset for the address of the
869 canonical descriptor of a function. */
870 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO
, /* type */
872 1, /* size (0 = byte, 1 = short, 2 = long) */
874 FALSE
, /* pc_relative */
876 complain_overflow_dont
, /* complain_on_overflow */
877 bfd_elf_generic_reloc
, /* special_function */
878 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
879 FALSE
, /* partial_inplace */
880 0xffff, /* src_mask */
881 0xffff, /* dst_mask */
882 FALSE
), /* pcrel_offset */
884 /* A 12-bit signed operand with the GOT offset for the address of
886 HOWTO (R_BFIN_GOTOFF17M4
, /* type */
888 1, /* size (0 = byte, 1 = short, 2 = long) */
890 FALSE
, /* pc_relative */
892 complain_overflow_signed
, /* complain_on_overflow */
893 bfd_elf_generic_reloc
, /* special_function */
894 "R_BFIN_GOTOFF17M4", /* name */
895 FALSE
, /* partial_inplace */
896 0xffff, /* src_mask */
897 0xffff, /* dst_mask */
898 FALSE
), /* pcrel_offset */
900 /* The upper 16 bits of the GOT offset for the address of the
902 HOWTO (R_BFIN_GOTOFFHI
, /* type */
904 1, /* size (0 = byte, 1 = short, 2 = long) */
906 FALSE
, /* pc_relative */
908 complain_overflow_dont
, /* complain_on_overflow */
909 bfd_elf_generic_reloc
, /* special_function */
910 "R_BFIN_GOTOFFHI", /* name */
911 FALSE
, /* partial_inplace */
912 0xffff, /* src_mask */
913 0xffff, /* dst_mask */
914 FALSE
), /* pcrel_offset */
916 /* The lower 16 bits of the GOT offset for the address of the
918 HOWTO (R_BFIN_GOTOFFLO
, /* type */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
922 FALSE
, /* pc_relative */
924 complain_overflow_dont
, /* complain_on_overflow */
925 bfd_elf_generic_reloc
, /* special_function */
926 "R_BFIN_GOTOFFLO", /* name */
927 FALSE
, /* partial_inplace */
928 0xffff, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE
), /* pcrel_offset */
933 static reloc_howto_type bfin_gnuext_howto_table
[] =
935 HOWTO (R_BFIN_PLTPC
, /* type. */
937 1, /* size (0 = byte, 1 = short, 2 = long). */
939 FALSE
, /* pc_relative. */
941 complain_overflow_bitfield
, /* complain_on_overflow. */
942 bfin_pltpc_reloc
, /* special_function. */
943 "R_BFIN_PLTPC", /* name. */
944 FALSE
, /* partial_inplace. */
945 0xffff, /* src_mask. */
946 0xffff, /* dst_mask. */
947 FALSE
), /* pcrel_offset. */
949 HOWTO (R_BFIN_GOT
, /* type. */
951 1, /* size (0 = byte, 1 = short, 2 = long). */
953 FALSE
, /* pc_relative. */
955 complain_overflow_bitfield
, /* complain_on_overflow. */
956 bfd_elf_generic_reloc
, /* special_function. */
957 "R_BFIN_GOT", /* name. */
958 FALSE
, /* partial_inplace. */
959 0x7fff, /* src_mask. */
960 0x7fff, /* dst_mask. */
961 FALSE
), /* pcrel_offset. */
963 /* GNU extension to record C++ vtable hierarchy. */
964 HOWTO (R_BFIN_GNU_VTINHERIT
, /* type. */
966 2, /* size (0 = byte, 1 = short, 2 = long). */
968 FALSE
, /* pc_relative. */
970 complain_overflow_dont
, /* complain_on_overflow. */
971 NULL
, /* special_function. */
972 "R_BFIN_GNU_VTINHERIT", /* name. */
973 FALSE
, /* partial_inplace. */
976 FALSE
), /* pcrel_offset. */
978 /* GNU extension to record C++ vtable member usage. */
979 HOWTO (R_BFIN_GNU_VTENTRY
, /* type. */
981 2, /* size (0 = byte, 1 = short, 2 = long). */
983 FALSE
, /* pc_relative. */
985 complain_overflow_dont
, /* complain_on_overflow. */
986 _bfd_elf_rel_vtable_reloc_fn
, /* special_function. */
987 "R_BFIN_GNU_VTENTRY", /* name. */
988 FALSE
, /* partial_inplace. */
991 FALSE
) /* pcrel_offset. */
994 struct bfin_reloc_map
996 bfd_reloc_code_real_type bfd_reloc_val
;
997 unsigned int bfin_reloc_val
;
1000 static const struct bfin_reloc_map bfin_reloc_map
[] =
1002 { BFD_RELOC_NONE
, R_BFIN_UNUSED0
},
1003 { BFD_RELOC_BFIN_5_PCREL
, R_BFIN_PCREL5M2
},
1004 { BFD_RELOC_NONE
, R_BFIN_UNUSED1
},
1005 { BFD_RELOC_BFIN_10_PCREL
, R_BFIN_PCREL10
},
1006 { BFD_RELOC_BFIN_12_PCREL_JUMP
, R_BFIN_PCREL12_JUMP
},
1007 { BFD_RELOC_BFIN_16_IMM
, R_BFIN_RIMM16
},
1008 { BFD_RELOC_BFIN_16_LOW
, R_BFIN_LUIMM16
},
1009 { BFD_RELOC_BFIN_16_HIGH
, R_BFIN_HUIMM16
},
1010 { BFD_RELOC_BFIN_12_PCREL_JUMP_S
, R_BFIN_PCREL12_JUMP_S
},
1011 { BFD_RELOC_24_PCREL
, R_BFIN_PCREL24
},
1012 { BFD_RELOC_24_PCREL
, R_BFIN_PCREL24
},
1013 { BFD_RELOC_BFIN_24_PCREL_JUMP_L
, R_BFIN_PCREL24_JUMP_L
},
1014 { BFD_RELOC_NONE
, R_BFIN_UNUSEDB
},
1015 { BFD_RELOC_NONE
, R_BFIN_UNUSEDC
},
1016 { BFD_RELOC_BFIN_24_PCREL_CALL_X
, R_BFIN_PCREL24_CALL_X
},
1017 { BFD_RELOC_8
, R_BFIN_BYTE_DATA
},
1018 { BFD_RELOC_16
, R_BFIN_BYTE2_DATA
},
1019 { BFD_RELOC_32
, R_BFIN_BYTE4_DATA
},
1020 { BFD_RELOC_BFIN_11_PCREL
, R_BFIN_PCREL11
},
1021 { BFD_RELOC_BFIN_GOT
, R_BFIN_GOT
},
1022 { BFD_RELOC_BFIN_PLTPC
, R_BFIN_PLTPC
},
1024 { BFD_RELOC_BFIN_GOT17M4
, R_BFIN_GOT17M4
},
1025 { BFD_RELOC_BFIN_GOTHI
, R_BFIN_GOTHI
},
1026 { BFD_RELOC_BFIN_GOTLO
, R_BFIN_GOTLO
},
1027 { BFD_RELOC_BFIN_FUNCDESC
, R_BFIN_FUNCDESC
},
1028 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4
, R_BFIN_FUNCDESC_GOT17M4
},
1029 { BFD_RELOC_BFIN_FUNCDESC_GOTHI
, R_BFIN_FUNCDESC_GOTHI
},
1030 { BFD_RELOC_BFIN_FUNCDESC_GOTLO
, R_BFIN_FUNCDESC_GOTLO
},
1031 { BFD_RELOC_BFIN_FUNCDESC_VALUE
, R_BFIN_FUNCDESC_VALUE
},
1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4
, R_BFIN_FUNCDESC_GOTOFF17M4
},
1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI
, R_BFIN_FUNCDESC_GOTOFFHI
},
1034 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO
, R_BFIN_FUNCDESC_GOTOFFLO
},
1035 { BFD_RELOC_BFIN_GOTOFF17M4
, R_BFIN_GOTOFF17M4
},
1036 { BFD_RELOC_BFIN_GOTOFFHI
, R_BFIN_GOTOFFHI
},
1037 { BFD_RELOC_BFIN_GOTOFFLO
, R_BFIN_GOTOFFLO
},
1039 { BFD_RELOC_VTABLE_INHERIT
, R_BFIN_GNU_VTINHERIT
},
1040 { BFD_RELOC_VTABLE_ENTRY
, R_BFIN_GNU_VTENTRY
},
1045 bfin_info_to_howto (bfd
*abfd
,
1047 Elf_Internal_Rela
*dst
)
1049 unsigned int r_type
;
1051 r_type
= ELF32_R_TYPE (dst
->r_info
);
1053 if (r_type
<= BFIN_RELOC_MAX
)
1054 cache_ptr
->howto
= &bfin_howto_table
[r_type
];
1056 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1057 cache_ptr
->howto
= &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1061 /* xgettext:c-format */
1062 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1064 bfd_set_error (bfd_error_bad_value
);
1071 /* Given a BFD reloc type, return the howto. */
1072 static reloc_howto_type
*
1073 bfin_bfd_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1074 bfd_reloc_code_real_type code
)
1077 unsigned int r_type
= (unsigned int) -1;
1079 for (i
= sizeof (bfin_reloc_map
) / sizeof (bfin_reloc_map
[0]); i
--;)
1080 if (bfin_reloc_map
[i
].bfd_reloc_val
== code
)
1081 r_type
= bfin_reloc_map
[i
].bfin_reloc_val
;
1083 if (r_type
<= BFIN_RELOC_MAX
)
1084 return &bfin_howto_table
[r_type
];
1086 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1087 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1089 return (reloc_howto_type
*) NULL
;
1092 static reloc_howto_type
*
1093 bfin_bfd_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1099 i
< (sizeof (bfin_howto_table
)
1100 / sizeof (bfin_howto_table
[0]));
1102 if (bfin_howto_table
[i
].name
!= NULL
1103 && strcasecmp (bfin_howto_table
[i
].name
, r_name
) == 0)
1104 return &bfin_howto_table
[i
];
1107 i
< (sizeof (bfin_gnuext_howto_table
)
1108 / sizeof (bfin_gnuext_howto_table
[0]));
1110 if (bfin_gnuext_howto_table
[i
].name
!= NULL
1111 && strcasecmp (bfin_gnuext_howto_table
[i
].name
, r_name
) == 0)
1112 return &bfin_gnuext_howto_table
[i
];
1117 /* Given a bfin relocation type, return the howto. */
1118 static reloc_howto_type
*
1119 bfin_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1120 unsigned int r_type
)
1122 if (r_type
<= BFIN_RELOC_MAX
)
1123 return &bfin_howto_table
[r_type
];
1125 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1126 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1128 return (reloc_howto_type
*) NULL
;
1131 /* Set by ld emulation if --code-in-l1. */
1132 bfd_boolean elf32_bfin_code_in_l1
= 0;
1134 /* Set by ld emulation if --data-in-l1. */
1135 bfd_boolean elf32_bfin_data_in_l1
= 0;
1138 elf32_bfin_final_write_processing (bfd
*abfd
)
1140 if (elf32_bfin_code_in_l1
)
1141 elf_elfheader (abfd
)->e_flags
|= EF_BFIN_CODE_IN_L1
;
1142 if (elf32_bfin_data_in_l1
)
1143 elf_elfheader (abfd
)->e_flags
|= EF_BFIN_DATA_IN_L1
;
1144 return _bfd_elf_final_write_processing (abfd
);
1147 /* Return TRUE if the name is a local label.
1148 bfin local labels begin with L$. */
1150 bfin_is_local_label_name (bfd
*abfd
, const char *label
)
1152 if (label
[0] == 'L' && label
[1] == '$' )
1155 return _bfd_elf_is_local_label_name (abfd
, label
);
1158 /* Look through the relocs for a section during the first phase, and
1159 allocate space in the global offset table or procedure linkage
1163 bfin_check_relocs (bfd
* abfd
,
1164 struct bfd_link_info
*info
,
1166 const Elf_Internal_Rela
*relocs
)
1169 Elf_Internal_Shdr
*symtab_hdr
;
1170 struct elf_link_hash_entry
**sym_hashes
;
1171 bfd_signed_vma
*local_got_refcounts
;
1172 const Elf_Internal_Rela
*rel
;
1173 const Elf_Internal_Rela
*rel_end
;
1177 if (bfd_link_relocatable (info
))
1180 dynobj
= elf_hash_table (info
)->dynobj
;
1181 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1182 sym_hashes
= elf_sym_hashes (abfd
);
1183 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1188 rel_end
= relocs
+ sec
->reloc_count
;
1189 for (rel
= relocs
; rel
< rel_end
; rel
++)
1191 unsigned long r_symndx
;
1192 struct elf_link_hash_entry
*h
;
1194 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1195 if (r_symndx
< symtab_hdr
->sh_info
)
1199 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1202 switch (ELF32_R_TYPE (rel
->r_info
))
1204 /* This relocation describes the C++ object vtable hierarchy.
1205 Reconstruct it for later use during GC. */
1206 case R_BFIN_GNU_VTINHERIT
:
1207 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1211 /* This relocation describes which C++ vtable entries
1212 are actually used. Record for later use during GC. */
1213 case R_BFIN_GNU_VTENTRY
:
1214 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1220 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1226 /* Create the .got section. */
1227 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1228 if (!_bfd_elf_create_got_section (dynobj
, info
))
1232 sgot
= elf_hash_table (info
)->sgot
;
1233 srelgot
= elf_hash_table (info
)->srelgot
;
1234 BFD_ASSERT (sgot
!= NULL
);
1238 if (h
->got
.refcount
== 0)
1240 /* Make sure this symbol is output as a dynamic symbol. */
1241 if (h
->dynindx
== -1 && !h
->forced_local
)
1243 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
1247 /* Allocate space in the .got section. */
1249 /* Allocate relocation space. */
1250 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1256 /* This is a global offset table entry for a local symbol. */
1257 if (local_got_refcounts
== NULL
)
1261 size
= symtab_hdr
->sh_info
;
1262 size
*= sizeof (bfd_signed_vma
);
1263 local_got_refcounts
= ((bfd_signed_vma
*)
1264 bfd_zalloc (abfd
, size
));
1265 if (local_got_refcounts
== NULL
)
1267 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1269 if (local_got_refcounts
[r_symndx
] == 0)
1272 if (bfd_link_pic (info
))
1274 /* If we are generating a shared object, we need to
1275 output a R_68K_RELATIVE reloc so that the dynamic
1276 linker can adjust this GOT entry. */
1277 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1280 local_got_refcounts
[r_symndx
]++;
1292 static enum elf_reloc_type_class
1293 elf32_bfin_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1294 const asection
*rel_sec ATTRIBUTE_UNUSED
,
1295 const Elf_Internal_Rela
* rela
)
1297 switch ((int) ELF32_R_TYPE (rela
->r_info
))
1300 return reloc_class_normal
;
1304 static bfd_reloc_status_type
1305 bfin_final_link_relocate (Elf_Internal_Rela
*rel
, reloc_howto_type
*howto
,
1306 bfd
*input_bfd
, asection
*input_section
,
1307 bfd_byte
*contents
, bfd_vma address
,
1308 bfd_vma value
, bfd_vma addend
)
1310 int r_type
= ELF32_R_TYPE (rel
->r_info
);
1312 if (r_type
== R_BFIN_PCREL24
|| r_type
== R_BFIN_PCREL24_JUMP_L
)
1314 bfd_reloc_status_type r
= bfd_reloc_ok
;
1317 if (address
> bfd_get_section_limit (input_bfd
, input_section
))
1318 return bfd_reloc_outofrange
;
1322 /* Perform usual pc-relative correction. */
1323 value
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
1326 /* We are getting reloc_entry->address 2 byte off from
1327 the start of instruction. Assuming absolute postion
1328 of the reloc data. But, following code had been written assuming
1329 reloc address is starting at begining of instruction.
1330 To compensate that I have increased the value of
1331 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1336 if ((value
& 0xFF000000) != 0
1337 && (value
& 0xFF000000) != 0xFF000000)
1338 r
= bfd_reloc_overflow
;
1342 x
= bfd_get_16 (input_bfd
, contents
+ address
);
1343 x
= (x
& 0xff00) | ((value
>> 16) & 0xff);
1344 bfd_put_16 (input_bfd
, x
, contents
+ address
);
1346 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
1348 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
1352 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
, contents
,
1353 rel
->r_offset
, value
, addend
);
1358 bfin_relocate_section (bfd
* output_bfd
,
1359 struct bfd_link_info
*info
,
1361 asection
* input_section
,
1362 bfd_byte
* contents
,
1363 Elf_Internal_Rela
* relocs
,
1364 Elf_Internal_Sym
* local_syms
,
1365 asection
** local_sections
)
1368 Elf_Internal_Shdr
*symtab_hdr
;
1369 struct elf_link_hash_entry
**sym_hashes
;
1370 bfd_vma
*local_got_offsets
;
1372 Elf_Internal_Rela
*rel
;
1373 Elf_Internal_Rela
*relend
;
1376 dynobj
= elf_hash_table (info
)->dynobj
;
1377 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1378 sym_hashes
= elf_sym_hashes (input_bfd
);
1379 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1384 relend
= relocs
+ input_section
->reloc_count
;
1385 for (; rel
< relend
; rel
++, i
++)
1388 reloc_howto_type
*howto
;
1389 unsigned long r_symndx
;
1390 struct elf_link_hash_entry
*h
;
1391 Elf_Internal_Sym
*sym
;
1393 bfd_vma relocation
= 0;
1394 bfd_boolean unresolved_reloc
;
1395 bfd_reloc_status_type r
;
1398 r_type
= ELF32_R_TYPE (rel
->r_info
);
1399 if (r_type
< 0 || r_type
>= 243)
1401 bfd_set_error (bfd_error_bad_value
);
1405 if (r_type
== R_BFIN_GNU_VTENTRY
1406 || r_type
== R_BFIN_GNU_VTINHERIT
)
1409 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
1412 bfd_set_error (bfd_error_bad_value
);
1415 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1420 unresolved_reloc
= FALSE
;
1422 if (r_symndx
< symtab_hdr
->sh_info
)
1424 sym
= local_syms
+ r_symndx
;
1425 sec
= local_sections
[r_symndx
];
1426 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1430 bfd_boolean warned
, ignored
;
1432 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1433 r_symndx
, symtab_hdr
, sym_hashes
,
1435 unresolved_reloc
, warned
, ignored
);
1438 if (sec
!= NULL
&& discarded_section (sec
))
1439 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1440 rel
, 1, relend
, howto
, 0, contents
);
1442 if (bfd_link_relocatable (info
))
1445 address
= rel
->r_offset
;
1447 /* Then, process normally. */
1450 case R_BFIN_GNU_VTINHERIT
:
1451 case R_BFIN_GNU_VTENTRY
:
1452 return bfd_reloc_ok
;
1455 /* Relocation is to the address of the entry for this symbol
1456 in the global offset table. */
1458 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1461 /* Relocation is the offset of the entry for this symbol in
1462 the global offset table. */
1469 /* Create the .got section. */
1470 elf_hash_table (info
)->dynobj
= dynobj
= output_bfd
;
1471 if (!_bfd_elf_create_got_section (dynobj
, info
))
1475 sgot
= elf_hash_table (info
)->sgot
;
1476 BFD_ASSERT (sgot
!= NULL
);
1482 off
= h
->got
.offset
;
1483 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1484 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
1486 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1487 bfd_link_pic (info
),
1489 || (bfd_link_pic (info
)
1495 /* This is actually a static link, or it is a
1496 -Bsymbolic link and the symbol is defined
1497 locally, or the symbol was forced to be local
1498 because of a version file.. We must initialize
1499 this entry in the global offset table. Since
1500 the offset must always be a multiple of 4, we
1501 use the least significant bit to record whether
1502 we have initialized it already.
1504 When doing a dynamic link, we create a .rela.got
1505 relocation entry to initialize the value. This
1506 is done in the finish_dynamic_symbol routine. */
1511 bfd_put_32 (output_bfd
, relocation
,
1512 sgot
->contents
+ off
);
1517 unresolved_reloc
= FALSE
;
1521 BFD_ASSERT (local_got_offsets
!= NULL
);
1522 off
= local_got_offsets
[r_symndx
];
1523 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1525 /* The offset must always be a multiple of 4. We use
1526 the least significant bit to record whether we have
1527 already generated the necessary reloc. */
1532 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1534 if (bfd_link_pic (info
))
1537 Elf_Internal_Rela outrel
;
1540 s
= elf_hash_table (info
)->srelgot
;
1541 BFD_ASSERT (s
!= NULL
);
1543 outrel
.r_offset
= (sgot
->output_section
->vma
1544 + sgot
->output_offset
+ off
);
1546 ELF32_R_INFO (0, R_BFIN_PCREL24
);
1547 outrel
.r_addend
= relocation
;
1550 s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1551 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1554 local_got_offsets
[r_symndx
] |= 1;
1558 relocation
= sgot
->output_offset
+ off
;
1560 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1567 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
1569 relocation
, rel
->r_addend
);
1574 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1575 because such sections are not SEC_ALLOC and thus ld.so will
1576 not process them. */
1577 if (unresolved_reloc
1578 && !((input_section
->flags
& SEC_DEBUGGING
) != 0 && h
->def_dynamic
)
1579 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1580 rel
->r_offset
) != (bfd_vma
) -1)
1583 /* xgettext:c-format */
1584 (_("%pB(%pA+%#" PRIx64
"): "
1585 "unresolvable relocation against symbol `%s'"),
1586 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
1587 h
->root
.root
.string
);
1591 if (r
!= bfd_reloc_ok
)
1596 name
= h
->root
.root
.string
;
1599 name
= bfd_elf_string_from_elf_section (input_bfd
,
1600 symtab_hdr
->sh_link
,
1605 name
= bfd_section_name (sec
);
1608 if (r
== bfd_reloc_overflow
)
1609 (*info
->callbacks
->reloc_overflow
)
1610 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1611 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1615 /* xgettext:c-format */
1616 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
1617 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
1628 bfin_gc_mark_hook (asection
* sec
,
1629 struct bfd_link_info
*info
,
1630 Elf_Internal_Rela
* rel
,
1631 struct elf_link_hash_entry
*h
,
1632 Elf_Internal_Sym
* sym
)
1635 switch (ELF32_R_TYPE (rel
->r_info
))
1637 case R_BFIN_GNU_VTINHERIT
:
1638 case R_BFIN_GNU_VTENTRY
:
1642 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1645 extern const bfd_target bfin_elf32_fdpic_vec
;
1646 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1648 /* An extension of the elf hash table data structure,
1649 containing some additional Blackfin-specific data. */
1650 struct bfinfdpic_elf_link_hash_table
1652 struct elf_link_hash_table elf
;
1654 /* A pointer to the .rofixup section. */
1655 asection
*sgotfixup
;
1656 /* GOT base offset. */
1658 /* Location of the first non-lazy PLT entry, i.e., the number of
1659 bytes taken by lazy PLT entries. */
1661 /* A hash table holding information about which symbols were
1662 referenced with which PIC-related relocations. */
1663 struct htab
*relocs_info
;
1664 /* Summary reloc information collected by
1665 _bfinfdpic_count_got_plt_entries. */
1666 struct _bfinfdpic_dynamic_got_info
*g
;
1669 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1671 #define bfinfdpic_hash_table(p) \
1672 ((is_elf_hash_table ((p)->hash) \
1673 && elf_hash_table_id (elf_hash_table (p)) == BFIN_ELF_DATA) \
1674 ? (struct bfinfdpic_elf_link_hash_table *) (p)->hash : NULL)
1676 #define bfinfdpic_got_section(info) \
1677 (bfinfdpic_hash_table (info)->elf.sgot)
1678 #define bfinfdpic_gotrel_section(info) \
1679 (bfinfdpic_hash_table (info)->elf.srelgot)
1680 #define bfinfdpic_gotfixup_section(info) \
1681 (bfinfdpic_hash_table (info)->sgotfixup)
1682 #define bfinfdpic_plt_section(info) \
1683 (bfinfdpic_hash_table (info)->elf.splt)
1684 #define bfinfdpic_pltrel_section(info) \
1685 (bfinfdpic_hash_table (info)->elf.srelplt)
1686 #define bfinfdpic_relocs_info(info) \
1687 (bfinfdpic_hash_table (info)->relocs_info)
1688 #define bfinfdpic_got_initial_offset(info) \
1689 (bfinfdpic_hash_table (info)->got0)
1690 #define bfinfdpic_plt_initial_offset(info) \
1691 (bfinfdpic_hash_table (info)->plt0)
1692 #define bfinfdpic_dynamic_got_plt_info(info) \
1693 (bfinfdpic_hash_table (info)->g)
1695 /* The name of the dynamic interpreter. This is put in the .interp
1698 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1700 #define DEFAULT_STACK_SIZE 0x20000
1702 /* This structure is used to collect the number of entries present in
1703 each addressable range of the got. */
1704 struct _bfinfdpic_dynamic_got_info
1706 /* Several bits of information about the current link. */
1707 struct bfd_link_info
*info
;
1708 /* Total size needed for GOT entries within the 18- or 32-bit
1710 bfd_vma got17m4
, gothilo
;
1711 /* Total size needed for function descriptor entries within the 18-
1712 or 32-bit ranges. */
1713 bfd_vma fd17m4
, fdhilo
;
1714 /* Total size needed function descriptor entries referenced in PLT
1715 entries, that would be profitable to place in offsets close to
1716 the PIC register. */
1718 /* Total size needed by lazy PLT entries. */
1720 /* Number of relocations carried over from input object files. */
1721 unsigned long relocs
;
1722 /* Number of fixups introduced by relocations in input object files. */
1723 unsigned long fixups
;
1726 /* Create a Blackfin ELF linker hash table. */
1728 static struct bfd_link_hash_table
*
1729 bfinfdpic_elf_link_hash_table_create (bfd
*abfd
)
1731 struct bfinfdpic_elf_link_hash_table
*ret
;
1732 size_t amt
= sizeof (struct bfinfdpic_elf_link_hash_table
);
1734 ret
= bfd_zmalloc (amt
);
1738 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1739 _bfd_elf_link_hash_newfunc
,
1740 sizeof (struct elf_link_hash_entry
),
1747 return &ret
->elf
.root
;
1750 /* Decide whether a reference to a symbol can be resolved locally or
1751 not. If the symbol is protected, we want the local address, but
1752 its function descriptor must be assigned by the dynamic linker. */
1753 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1754 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1755 || ! elf_hash_table (INFO)->dynamic_sections_created)
1756 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1757 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1759 /* This structure collects information on what kind of GOT, PLT or
1760 function descriptors are required by relocations that reference a
1762 struct bfinfdpic_relocs_info
1764 /* The index of the symbol, as stored in the relocation r_info, if
1765 we have a local symbol; -1 otherwise. */
1769 /* The input bfd in which the symbol is defined, if it's a local
1772 /* If symndx == -1, the hash table entry corresponding to a global
1773 symbol (even if it turns out to bind locally, in which case it
1774 should ideally be replaced with section's symndx + addend). */
1775 struct elf_link_hash_entry
*h
;
1777 /* The addend of the relocation that references the symbol. */
1780 /* The fields above are used to identify an entry. The fields below
1781 contain information on how an entry is used and, later on, which
1782 locations it was assigned. */
1783 /* The following 2 fields record whether the symbol+addend above was
1784 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1785 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1788 /* Whether a FUNCDESC relocation references symbol+addend. */
1790 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1793 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1794 unsigned fdgoff17m4
;
1795 unsigned fdgoffhilo
;
1796 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1797 GOTOFFHI relocations. The addend doesn't really matter, since we
1798 envision that this will only be used to check whether the symbol
1799 is mapped to the same segment as the got. */
1801 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1803 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1806 /* Whether we need a PLT entry for a symbol. Should be implied by
1808 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1810 /* Whether a function descriptor should be created in this link unit
1811 for symbol+addend. Should be implied by something like:
1812 (plt || fdgotoff17m4 || fdgotofflohi
1813 || ((fd || fdgot17m4 || fdgothilo)
1814 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1816 /* Whether a lazy PLT entry is needed for this symbol+addend.
1817 Should be implied by something like:
1818 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1819 && ! (info->flags & DF_BIND_NOW)) */
1821 /* Whether we've already emitted GOT relocations and PLT entries as
1822 needed for this symbol. */
1825 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1826 relocations referencing the symbol. */
1827 unsigned relocs32
, relocsfd
, relocsfdv
;
1829 /* The number of .rofixups entries and dynamic relocations allocated
1830 for this symbol, minus any that might have already been used. */
1831 unsigned fixups
, dynrelocs
;
1833 /* The offsets of the GOT entries assigned to symbol+addend, to the
1834 function descriptor's address, and to a function descriptor,
1835 respectively. Should be zero if unassigned. The offsets are
1836 counted from the value that will be assigned to the PIC register,
1837 not from the beginning of the .got section. */
1838 bfd_signed_vma got_entry
, fdgot_entry
, fd_entry
;
1839 /* The offsets of the PLT entries assigned to symbol+addend,
1840 non-lazy and lazy, respectively. If unassigned, should be
1842 bfd_vma plt_entry
, lzplt_entry
;
1845 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1847 bfinfdpic_relocs_info_hash (const void *entry_
)
1849 const struct bfinfdpic_relocs_info
*entry
= entry_
;
1851 return (entry
->symndx
== -1
1852 ? (long) entry
->d
.h
->root
.root
.hash
1853 : entry
->symndx
+ (long) entry
->d
.abfd
->id
* 257) + entry
->addend
;
1856 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1859 bfinfdpic_relocs_info_eq (const void *entry1
, const void *entry2
)
1861 const struct bfinfdpic_relocs_info
*e1
= entry1
;
1862 const struct bfinfdpic_relocs_info
*e2
= entry2
;
1864 return e1
->symndx
== e2
->symndx
&& e1
->addend
== e2
->addend
1865 && (e1
->symndx
== -1 ? e1
->d
.h
== e2
->d
.h
: e1
->d
.abfd
== e2
->d
.abfd
);
1868 /* Find or create an entry in a hash table HT that matches the key
1869 fields of the given ENTRY. If it's not found, memory for a new
1870 entry is allocated in ABFD's obstack. */
1871 static struct bfinfdpic_relocs_info
*
1872 bfinfdpic_relocs_info_find (struct htab
*ht
,
1874 const struct bfinfdpic_relocs_info
*entry
,
1875 enum insert_option insert
)
1877 struct bfinfdpic_relocs_info
**loc
;
1882 loc
= (struct bfinfdpic_relocs_info
**) htab_find_slot (ht
, entry
, insert
);
1890 *loc
= bfd_zalloc (abfd
, sizeof (**loc
));
1895 (*loc
)->symndx
= entry
->symndx
;
1896 (*loc
)->d
= entry
->d
;
1897 (*loc
)->addend
= entry
->addend
;
1898 (*loc
)->plt_entry
= (bfd_vma
)-1;
1899 (*loc
)->lzplt_entry
= (bfd_vma
)-1;
1904 /* Obtain the address of the entry in HT associated with H's symbol +
1905 addend, creating a new entry if none existed. ABFD is only used
1906 for memory allocation purposes. */
1907 inline static struct bfinfdpic_relocs_info
*
1908 bfinfdpic_relocs_info_for_global (struct htab
*ht
,
1910 struct elf_link_hash_entry
*h
,
1912 enum insert_option insert
)
1914 struct bfinfdpic_relocs_info entry
;
1918 entry
.addend
= addend
;
1920 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1923 /* Obtain the address of the entry in HT associated with the SYMNDXth
1924 local symbol of the input bfd ABFD, plus the addend, creating a new
1925 entry if none existed. */
1926 inline static struct bfinfdpic_relocs_info
*
1927 bfinfdpic_relocs_info_for_local (struct htab
*ht
,
1931 enum insert_option insert
)
1933 struct bfinfdpic_relocs_info entry
;
1935 entry
.symndx
= symndx
;
1936 entry
.d
.abfd
= abfd
;
1937 entry
.addend
= addend
;
1939 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1942 /* Merge fields set by check_relocs() of two entries that end up being
1943 mapped to the same (presumably global) symbol. */
1946 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info
*e2
,
1947 struct bfinfdpic_relocs_info
const *e1
)
1949 e2
->got17m4
|= e1
->got17m4
;
1950 e2
->gothilo
|= e1
->gothilo
;
1952 e2
->fdgot17m4
|= e1
->fdgot17m4
;
1953 e2
->fdgothilo
|= e1
->fdgothilo
;
1954 e2
->fdgoff17m4
|= e1
->fdgoff17m4
;
1955 e2
->fdgoffhilo
|= e1
->fdgoffhilo
;
1956 e2
->gotoff
|= e1
->gotoff
;
1957 e2
->call
|= e1
->call
;
1961 /* Every block of 65535 lazy PLT entries shares a single call to the
1962 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1963 32767, counting from 0). All other lazy PLT entries branch to it
1964 in a single instruction. */
1966 #define LZPLT_RESOLVER_EXTRA 10
1967 #define LZPLT_NORMAL_SIZE 6
1968 #define LZPLT_ENTRIES 1362
1970 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1971 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1973 /* Add a dynamic relocation to the SRELOC section. */
1975 inline static bfd_vma
1976 _bfinfdpic_add_dyn_reloc (bfd
*output_bfd
, asection
*sreloc
, bfd_vma offset
,
1977 int reloc_type
, long dynindx
, bfd_vma addend
,
1978 struct bfinfdpic_relocs_info
*entry
)
1980 Elf_Internal_Rela outrel
;
1981 bfd_vma reloc_offset
;
1983 outrel
.r_offset
= offset
;
1984 outrel
.r_info
= ELF32_R_INFO (dynindx
, reloc_type
);
1985 outrel
.r_addend
= addend
;
1987 reloc_offset
= sreloc
->reloc_count
* sizeof (Elf32_External_Rel
);
1988 BFD_ASSERT (reloc_offset
< sreloc
->size
);
1989 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1990 sreloc
->contents
+ reloc_offset
);
1991 sreloc
->reloc_count
++;
1993 /* If the entry's index is zero, this relocation was probably to a
1994 linkonce section that got discarded. We reserved a dynamic
1995 relocation, but it was for another entry than the one we got at
1996 the time of emitting the relocation. Unfortunately there's no
1997 simple way for us to catch this situation, since the relocation
1998 is cleared right before calling relocate_section, at which point
1999 we no longer know what the relocation used to point to. */
2002 BFD_ASSERT (entry
->dynrelocs
> 0);
2006 return reloc_offset
;
2009 /* Add a fixup to the ROFIXUP section. */
2012 _bfinfdpic_add_rofixup (bfd
*output_bfd
, asection
*rofixup
, bfd_vma offset
,
2013 struct bfinfdpic_relocs_info
*entry
)
2015 bfd_vma fixup_offset
;
2017 if (rofixup
->flags
& SEC_EXCLUDE
)
2020 fixup_offset
= rofixup
->reloc_count
* 4;
2021 if (rofixup
->contents
)
2023 BFD_ASSERT (fixup_offset
< rofixup
->size
);
2024 bfd_put_32 (output_bfd
, offset
, rofixup
->contents
+ fixup_offset
);
2026 rofixup
->reloc_count
++;
2028 if (entry
&& entry
->symndx
)
2030 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2032 BFD_ASSERT (entry
->fixups
> 0);
2036 return fixup_offset
;
2039 /* Find the segment number in which OSEC, and output section, is
2043 _bfinfdpic_osec_to_segment (bfd
*output_bfd
, asection
*osec
)
2045 Elf_Internal_Phdr
*p
= _bfd_elf_find_segment_containing_section (output_bfd
, osec
);
2047 return (p
!= NULL
) ? p
- elf_tdata (output_bfd
)->phdr
: -1;
2050 inline static bfd_boolean
2051 _bfinfdpic_osec_readonly_p (bfd
*output_bfd
, asection
*osec
)
2053 unsigned seg
= _bfinfdpic_osec_to_segment (output_bfd
, osec
);
2055 return ! (elf_tdata (output_bfd
)->phdr
[seg
].p_flags
& PF_W
);
2058 /* Generate relocations for GOT entries, function descriptors, and
2059 code for PLT and lazy PLT entries. */
2061 inline static bfd_boolean
2062 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info
*entry
,
2064 struct bfd_link_info
*info
,
2066 Elf_Internal_Sym
*sym
,
2069 bfd_vma fd_lazy_rel_offset
= (bfd_vma
) -1;
2076 if (entry
->got_entry
|| entry
->fdgot_entry
|| entry
->fd_entry
)
2078 /* If the symbol is dynamic, consider it for dynamic
2079 relocations, otherwise decay to section + offset. */
2080 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1)
2081 dynindx
= entry
->d
.h
->dynindx
;
2085 && sec
->output_section
2086 && ! bfd_is_abs_section (sec
->output_section
)
2087 && ! bfd_is_und_section (sec
->output_section
))
2088 dynindx
= elf_section_data (sec
->output_section
)->dynindx
;
2094 /* Generate relocation for GOT entry pointing to the symbol. */
2095 if (entry
->got_entry
)
2098 bfd_vma ad
= addend
;
2100 /* If the symbol is dynamic but binds locally, use
2102 if (sec
&& (entry
->symndx
!= -1
2103 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2105 if (entry
->symndx
== -1)
2106 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2108 ad
+= sym
->st_value
;
2109 ad
+= sec
->output_offset
;
2110 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2111 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2116 /* If we're linking an executable at a fixed address, we can
2117 omit the dynamic relocation as long as the symbol is local to
2119 if (bfd_link_pde (info
)
2120 && (entry
->symndx
!= -1
2121 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2124 ad
+= sec
->output_section
->vma
;
2125 if (entry
->symndx
!= -1
2126 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2127 _bfinfdpic_add_rofixup (output_bfd
,
2128 bfinfdpic_gotfixup_section (info
),
2129 bfinfdpic_got_section (info
)->output_section
2131 + bfinfdpic_got_section (info
)->output_offset
2132 + bfinfdpic_got_initial_offset (info
)
2133 + entry
->got_entry
, entry
);
2136 _bfinfdpic_add_dyn_reloc (output_bfd
, bfinfdpic_gotrel_section (info
),
2137 _bfd_elf_section_offset
2139 bfinfdpic_got_section (info
),
2140 bfinfdpic_got_initial_offset (info
)
2142 + bfinfdpic_got_section (info
)
2143 ->output_section
->vma
2144 + bfinfdpic_got_section (info
)->output_offset
,
2145 R_BFIN_BYTE4_DATA
, idx
, ad
, entry
);
2147 bfd_put_32 (output_bfd
, ad
,
2148 bfinfdpic_got_section (info
)->contents
2149 + bfinfdpic_got_initial_offset (info
)
2150 + entry
->got_entry
);
2153 /* Generate relocation for GOT entry pointing to a canonical
2154 function descriptor. */
2155 if (entry
->fdgot_entry
)
2160 if (! (entry
->symndx
== -1
2161 && entry
->d
.h
->root
.type
== bfd_link_hash_undefweak
2162 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2164 /* If the symbol is dynamic and there may be dynamic symbol
2165 resolution because we are, or are linked with, a shared
2166 library, emit a FUNCDESC relocation such that the dynamic
2167 linker will allocate the function descriptor. If the
2168 symbol needs a non-local function descriptor but binds
2169 locally (e.g., its visibility is protected, emit a
2170 dynamic relocation decayed to section+offset. */
2171 if (entry
->symndx
== -1
2172 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)
2173 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)
2174 && !bfd_link_pde (info
))
2176 reloc
= R_BFIN_FUNCDESC
;
2177 idx
= elf_section_data (entry
->d
.h
->root
.u
.def
.section
2178 ->output_section
)->dynindx
;
2179 ad
= entry
->d
.h
->root
.u
.def
.section
->output_offset
2180 + entry
->d
.h
->root
.u
.def
.value
;
2182 else if (entry
->symndx
== -1
2183 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
))
2185 reloc
= R_BFIN_FUNCDESC
;
2193 /* Otherwise, we know we have a private function descriptor,
2194 so reference it directly. */
2195 if (elf_hash_table (info
)->dynamic_sections_created
)
2196 BFD_ASSERT (entry
->privfd
);
2197 reloc
= R_BFIN_BYTE4_DATA
;
2198 idx
= elf_section_data (bfinfdpic_got_section (info
)
2199 ->output_section
)->dynindx
;
2200 ad
= bfinfdpic_got_section (info
)->output_offset
2201 + bfinfdpic_got_initial_offset (info
) + entry
->fd_entry
;
2204 /* If there is room for dynamic symbol resolution, emit the
2205 dynamic relocation. However, if we're linking an
2206 executable at a fixed location, we won't have emitted a
2207 dynamic symbol entry for the got section, so idx will be
2208 zero, which means we can and should compute the address
2209 of the private descriptor ourselves. */
2210 if (bfd_link_pde (info
)
2211 && (entry
->symndx
!= -1
2212 || BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)))
2214 ad
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2215 _bfinfdpic_add_rofixup (output_bfd
,
2216 bfinfdpic_gotfixup_section (info
),
2217 bfinfdpic_got_section (info
)
2218 ->output_section
->vma
2219 + bfinfdpic_got_section (info
)
2221 + bfinfdpic_got_initial_offset (info
)
2222 + entry
->fdgot_entry
, entry
);
2225 _bfinfdpic_add_dyn_reloc (output_bfd
,
2226 bfinfdpic_gotrel_section (info
),
2227 _bfd_elf_section_offset
2229 bfinfdpic_got_section (info
),
2230 bfinfdpic_got_initial_offset (info
)
2231 + entry
->fdgot_entry
)
2232 + bfinfdpic_got_section (info
)
2233 ->output_section
->vma
2234 + bfinfdpic_got_section (info
)
2236 reloc
, idx
, ad
, entry
);
2239 bfd_put_32 (output_bfd
, ad
,
2240 bfinfdpic_got_section (info
)->contents
2241 + bfinfdpic_got_initial_offset (info
)
2242 + entry
->fdgot_entry
);
2245 /* Generate relocation to fill in a private function descriptor in
2247 if (entry
->fd_entry
)
2250 bfd_vma ad
= addend
;
2252 long lowword
, highword
;
2254 /* If the symbol is dynamic but binds locally, use
2256 if (sec
&& (entry
->symndx
!= -1
2257 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2259 if (entry
->symndx
== -1)
2260 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2262 ad
+= sym
->st_value
;
2263 ad
+= sec
->output_offset
;
2264 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2265 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2270 /* If we're linking an executable at a fixed address, we can
2271 omit the dynamic relocation as long as the symbol is local to
2273 if (bfd_link_pde (info
)
2274 && (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2277 ad
+= sec
->output_section
->vma
;
2279 if (entry
->symndx
!= -1
2280 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2282 _bfinfdpic_add_rofixup (output_bfd
,
2283 bfinfdpic_gotfixup_section (info
),
2284 bfinfdpic_got_section (info
)
2285 ->output_section
->vma
2286 + bfinfdpic_got_section (info
)
2288 + bfinfdpic_got_initial_offset (info
)
2289 + entry
->fd_entry
, entry
);
2290 _bfinfdpic_add_rofixup (output_bfd
,
2291 bfinfdpic_gotfixup_section (info
),
2292 bfinfdpic_got_section (info
)
2293 ->output_section
->vma
2294 + bfinfdpic_got_section (info
)
2296 + bfinfdpic_got_initial_offset (info
)
2297 + entry
->fd_entry
+ 4, entry
);
2303 = _bfinfdpic_add_dyn_reloc (output_bfd
,
2305 ? bfinfdpic_pltrel_section (info
)
2306 : bfinfdpic_gotrel_section (info
),
2307 _bfd_elf_section_offset
2309 bfinfdpic_got_section (info
),
2310 bfinfdpic_got_initial_offset (info
)
2312 + bfinfdpic_got_section (info
)
2313 ->output_section
->vma
2314 + bfinfdpic_got_section (info
)
2316 R_BFIN_FUNCDESC_VALUE
, idx
, ad
, entry
);
2319 /* If we've omitted the dynamic relocation, just emit the fixed
2320 addresses of the symbol and of the local GOT base offset. */
2321 if (bfd_link_pde (info
)
2323 && sec
->output_section
)
2326 highword
= bfinfdpic_got_section (info
)->output_section
->vma
2327 + bfinfdpic_got_section (info
)->output_offset
2328 + bfinfdpic_got_initial_offset (info
);
2330 else if (entry
->lazyplt
)
2335 fd_lazy_rel_offset
= ofst
;
2337 /* A function descriptor used for lazy or local resolving is
2338 initialized such that its high word contains the output
2339 section index in which the PLT entries are located, and
2340 the low word contains the address of the lazy PLT entry
2341 entry point, that must be within the memory region
2342 assigned to that section. */
2343 lowword
= entry
->lzplt_entry
+ 4
2344 + bfinfdpic_plt_section (info
)->output_offset
2345 + bfinfdpic_plt_section (info
)->output_section
->vma
;
2346 highword
= _bfinfdpic_osec_to_segment
2347 (output_bfd
, bfinfdpic_plt_section (info
)->output_section
);
2351 /* A function descriptor for a local function gets the index
2352 of the section. For a non-local function, it's
2356 || (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1
2357 && entry
->d
.h
->dynindx
== idx
))
2360 highword
= _bfinfdpic_osec_to_segment
2361 (output_bfd
, sec
->output_section
);
2364 bfd_put_32 (output_bfd
, lowword
,
2365 bfinfdpic_got_section (info
)->contents
2366 + bfinfdpic_got_initial_offset (info
)
2368 bfd_put_32 (output_bfd
, highword
,
2369 bfinfdpic_got_section (info
)->contents
2370 + bfinfdpic_got_initial_offset (info
)
2371 + entry
->fd_entry
+ 4);
2374 /* Generate code for the PLT entry. */
2375 if (entry
->plt_entry
!= (bfd_vma
) -1)
2377 bfd_byte
*plt_code
= bfinfdpic_plt_section (info
)->contents
2380 BFD_ASSERT (entry
->fd_entry
);
2382 /* Figure out what kind of PLT entry we need, depending on the
2383 location of the function descriptor within the GOT. */
2384 if (entry
->fd_entry
>= -(1 << (18 - 1))
2385 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
2387 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2388 bfd_put_32 (output_bfd
,
2389 0xe519 | ((entry
->fd_entry
<< 14) & 0xFFFF0000),
2391 bfd_put_32 (output_bfd
,
2392 0xe51b | (((entry
->fd_entry
+ 4) << 14) & 0xFFFF0000),
2398 /* P1.L = fd_entry; P1.H = fd_entry;
2402 bfd_put_32 (output_bfd
,
2403 0xe109 | (entry
->fd_entry
<< 16),
2405 bfd_put_32 (output_bfd
,
2406 0xe149 | (entry
->fd_entry
& 0xFFFF0000),
2408 bfd_put_16 (output_bfd
, 0x5ad9, plt_code
+ 8);
2409 bfd_put_16 (output_bfd
, 0x9159, plt_code
+ 10);
2410 bfd_put_16 (output_bfd
, 0xac5b, plt_code
+ 12);
2414 bfd_put_16 (output_bfd
, 0x0051, plt_code
);
2417 /* Generate code for the lazy PLT entry. */
2418 if (entry
->lzplt_entry
!= (bfd_vma
) -1)
2420 bfd_byte
*lzplt_code
= bfinfdpic_plt_section (info
)->contents
2421 + entry
->lzplt_entry
;
2422 bfd_vma resolverStub_addr
;
2424 bfd_put_32 (output_bfd
, fd_lazy_rel_offset
, lzplt_code
);
2427 resolverStub_addr
= entry
->lzplt_entry
/ BFINFDPIC_LZPLT_BLOCK_SIZE
2428 * BFINFDPIC_LZPLT_BLOCK_SIZE
+ BFINFDPIC_LZPLT_RESOLV_LOC
;
2429 if (resolverStub_addr
>= bfinfdpic_plt_initial_offset (info
))
2430 resolverStub_addr
= bfinfdpic_plt_initial_offset (info
) - LZPLT_NORMAL_SIZE
- LZPLT_RESOLVER_EXTRA
;
2432 if (entry
->lzplt_entry
== resolverStub_addr
)
2434 /* This is a lazy PLT entry that includes a resolver call.
2438 bfd_put_32 (output_bfd
,
2441 bfd_put_16 (output_bfd
, 0x0052, lzplt_code
+ 4);
2445 /* JUMP.S resolverStub */
2446 bfd_put_16 (output_bfd
,
2448 | (((resolverStub_addr
- entry
->lzplt_entry
)
2449 / 2) & (((bfd_vma
)1 << 12) - 1)),
2457 /* Relocate an Blackfin ELF section.
2459 The RELOCATE_SECTION function is called by the new ELF backend linker
2460 to handle the relocations for a section.
2462 The relocs are always passed as Rela structures; if the section
2463 actually uses Rel structures, the r_addend field will always be
2466 This function is responsible for adjusting the section contents as
2467 necessary, and (if using Rela relocs and generating a relocatable
2468 output file) adjusting the reloc addend as necessary.
2470 This function does not have to worry about setting the reloc
2471 address or the reloc symbol index.
2473 LOCAL_SYMS is a pointer to the swapped in local symbols.
2475 LOCAL_SECTIONS is an array giving the section in the input file
2476 corresponding to the st_shndx field of each local symbol.
2478 The global hash table entry for the global symbols can be found
2479 via elf_sym_hashes (input_bfd).
2481 When generating relocatable output, this function must handle
2482 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2483 going to be the section symbol corresponding to the output
2484 section, which means that the addend must be adjusted
2488 bfinfdpic_relocate_section (bfd
* output_bfd
,
2489 struct bfd_link_info
*info
,
2491 asection
* input_section
,
2492 bfd_byte
* contents
,
2493 Elf_Internal_Rela
* relocs
,
2494 Elf_Internal_Sym
* local_syms
,
2495 asection
** local_sections
)
2497 Elf_Internal_Shdr
*symtab_hdr
;
2498 struct elf_link_hash_entry
**sym_hashes
;
2499 Elf_Internal_Rela
*rel
;
2500 Elf_Internal_Rela
*relend
;
2501 unsigned isec_segment
, got_segment
, plt_segment
,
2503 int silence_segment_error
= !bfd_link_pic (info
);
2505 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
2506 sym_hashes
= elf_sym_hashes (input_bfd
);
2507 relend
= relocs
+ input_section
->reloc_count
;
2509 isec_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2510 input_section
->output_section
);
2511 if (IS_FDPIC (output_bfd
) && bfinfdpic_got_section (info
))
2512 got_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2513 bfinfdpic_got_section (info
)
2517 if (IS_FDPIC (output_bfd
) && elf_hash_table (info
)->dynamic_sections_created
)
2518 plt_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2519 bfinfdpic_plt_section (info
)
2524 for (rel
= relocs
; rel
< relend
; rel
++)
2526 reloc_howto_type
*howto
;
2527 unsigned long r_symndx
;
2528 Elf_Internal_Sym
*sym
;
2530 struct elf_link_hash_entry
*h
;
2532 bfd_reloc_status_type r
;
2533 const char * name
= NULL
;
2536 struct bfinfdpic_relocs_info
*picrel
;
2537 bfd_vma orig_addend
= rel
->r_addend
;
2539 r_type
= ELF32_R_TYPE (rel
->r_info
);
2541 if (r_type
== R_BFIN_GNU_VTINHERIT
2542 || r_type
== R_BFIN_GNU_VTENTRY
)
2545 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2546 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2549 bfd_set_error (bfd_error_bad_value
);
2558 if (r_symndx
< symtab_hdr
->sh_info
)
2560 sym
= local_syms
+ r_symndx
;
2561 osec
= sec
= local_sections
[r_symndx
];
2562 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2564 name
= bfd_elf_string_from_elf_section
2565 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
2566 name
= name
== NULL
? bfd_section_name (sec
) : name
;
2570 bfd_boolean warned
, ignored
;
2571 bfd_boolean unresolved_reloc
;
2573 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2574 r_symndx
, symtab_hdr
, sym_hashes
,
2576 unresolved_reloc
, warned
, ignored
);
2580 if (sec
!= NULL
&& discarded_section (sec
))
2581 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2582 rel
, 1, relend
, howto
, 0, contents
);
2584 if (bfd_link_relocatable (info
))
2588 && (h
->root
.type
== bfd_link_hash_defined
2589 || h
->root
.type
== bfd_link_hash_defweak
)
2590 && !BFINFDPIC_SYM_LOCAL (info
, h
))
2598 case R_BFIN_PCREL24
:
2599 case R_BFIN_PCREL24_JUMP_L
:
2600 case R_BFIN_BYTE4_DATA
:
2601 if (! IS_FDPIC (output_bfd
))
2605 case R_BFIN_GOT17M4
:
2608 case R_BFIN_FUNCDESC_GOT17M4
:
2609 case R_BFIN_FUNCDESC_GOTHI
:
2610 case R_BFIN_FUNCDESC_GOTLO
:
2611 case R_BFIN_GOTOFF17M4
:
2612 case R_BFIN_GOTOFFHI
:
2613 case R_BFIN_GOTOFFLO
:
2614 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2615 case R_BFIN_FUNCDESC_GOTOFFHI
:
2616 case R_BFIN_FUNCDESC_GOTOFFLO
:
2617 case R_BFIN_FUNCDESC
:
2618 case R_BFIN_FUNCDESC_VALUE
:
2619 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2623 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2624 (info
), input_bfd
, h
,
2625 orig_addend
, INSERT
);
2627 /* In order to find the entry we created before, we must
2628 use the original addend, not the one that may have been
2629 modified by _bfd_elf_rela_local_sym(). */
2630 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2631 (info
), input_bfd
, r_symndx
,
2632 orig_addend
, INSERT
);
2636 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel
, output_bfd
, info
,
2641 /* xgettext:c-format */
2642 (_("%pB: relocation at `%pA+%#" PRIx64
"' "
2643 "references symbol `%s' with nonzero addend"),
2644 input_bfd
, input_section
, (uint64_t) rel
->r_offset
, name
);
2654 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2655 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2656 rel
->r_offset
) != (bfd_vma
) -1)
2658 info
->callbacks
->warning
2659 (info
, _("relocation references symbol not defined in the module"),
2660 name
, input_bfd
, input_section
, rel
->r_offset
);
2668 case R_BFIN_PCREL24
:
2669 case R_BFIN_PCREL24_JUMP_L
:
2670 check_segment
[0] = isec_segment
;
2671 if (! IS_FDPIC (output_bfd
))
2672 check_segment
[1] = isec_segment
;
2673 else if (picrel
->plt
)
2675 relocation
= bfinfdpic_plt_section (info
)->output_section
->vma
2676 + bfinfdpic_plt_section (info
)->output_offset
2677 + picrel
->plt_entry
;
2678 check_segment
[1] = plt_segment
;
2680 /* We don't want to warn on calls to undefined weak symbols,
2681 as calls to them must be protected by non-NULL tests
2682 anyway, and unprotected calls would invoke undefined
2684 else if (picrel
->symndx
== -1
2685 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefweak
)
2686 check_segment
[1] = check_segment
[0];
2688 check_segment
[1] = sec
2689 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2693 case R_BFIN_GOT17M4
:
2696 relocation
= picrel
->got_entry
;
2697 check_segment
[0] = check_segment
[1] = got_segment
;
2700 case R_BFIN_FUNCDESC_GOT17M4
:
2701 case R_BFIN_FUNCDESC_GOTHI
:
2702 case R_BFIN_FUNCDESC_GOTLO
:
2703 relocation
= picrel
->fdgot_entry
;
2704 check_segment
[0] = check_segment
[1] = got_segment
;
2707 case R_BFIN_GOTOFFHI
:
2708 case R_BFIN_GOTOFF17M4
:
2709 case R_BFIN_GOTOFFLO
:
2710 relocation
-= bfinfdpic_got_section (info
)->output_section
->vma
2711 + bfinfdpic_got_section (info
)->output_offset
2712 + bfinfdpic_got_initial_offset (info
);
2713 check_segment
[0] = got_segment
;
2714 check_segment
[1] = sec
2715 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2719 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2720 case R_BFIN_FUNCDESC_GOTOFFHI
:
2721 case R_BFIN_FUNCDESC_GOTOFFLO
:
2722 relocation
= picrel
->fd_entry
;
2723 check_segment
[0] = check_segment
[1] = got_segment
;
2726 case R_BFIN_FUNCDESC
:
2729 bfd_vma addend
= rel
->r_addend
;
2731 if (! (h
&& h
->root
.type
== bfd_link_hash_undefweak
2732 && BFINFDPIC_SYM_LOCAL (info
, h
)))
2734 /* If the symbol is dynamic and there may be dynamic
2735 symbol resolution because we are or are linked with a
2736 shared library, emit a FUNCDESC relocation such that
2737 the dynamic linker will allocate the function
2738 descriptor. If the symbol needs a non-local function
2739 descriptor but binds locally (e.g., its visibility is
2740 protected, emit a dynamic relocation decayed to
2742 if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
)
2743 && BFINFDPIC_SYM_LOCAL (info
, h
)
2744 && !bfd_link_pde (info
))
2746 dynindx
= elf_section_data (h
->root
.u
.def
.section
2747 ->output_section
)->dynindx
;
2748 addend
+= h
->root
.u
.def
.section
->output_offset
2749 + h
->root
.u
.def
.value
;
2751 else if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
))
2755 info
->callbacks
->warning
2756 (info
, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2757 name
, input_bfd
, input_section
, rel
->r_offset
);
2760 dynindx
= h
->dynindx
;
2764 /* Otherwise, we know we have a private function
2765 descriptor, so reference it directly. */
2766 BFD_ASSERT (picrel
->privfd
);
2767 r_type
= R_BFIN_BYTE4_DATA
;
2768 dynindx
= elf_section_data (bfinfdpic_got_section (info
)
2769 ->output_section
)->dynindx
;
2770 addend
= bfinfdpic_got_section (info
)->output_offset
2771 + bfinfdpic_got_initial_offset (info
)
2775 /* If there is room for dynamic symbol resolution, emit
2776 the dynamic relocation. However, if we're linking an
2777 executable at a fixed location, we won't have emitted a
2778 dynamic symbol entry for the got section, so idx will
2779 be zero, which means we can and should compute the
2780 address of the private descriptor ourselves. */
2781 if (bfd_link_pde (info
)
2782 && (!h
|| BFINFDPIC_FUNCDESC_LOCAL (info
, h
)))
2786 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2787 if ((bfd_section_flags (input_section
->output_section
)
2788 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2790 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2794 info
->callbacks
->warning
2796 _("cannot emit fixups in read-only section"),
2797 name
, input_bfd
, input_section
, rel
->r_offset
);
2801 offset
= _bfd_elf_section_offset
2803 input_section
, rel
->r_offset
);
2805 if (offset
!= (bfd_vma
)-1)
2806 _bfinfdpic_add_rofixup (output_bfd
,
2807 bfinfdpic_gotfixup_section
2809 offset
+ input_section
2810 ->output_section
->vma
2811 + input_section
->output_offset
,
2815 else if ((bfd_section_flags (input_section
->output_section
)
2816 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2820 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2824 info
->callbacks
->warning
2826 _("cannot emit dynamic relocations in read-only section"),
2827 name
, input_bfd
, input_section
, rel
->r_offset
);
2830 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2831 input_section
, rel
->r_offset
);
2833 if (offset
!= (bfd_vma
)-1)
2834 _bfinfdpic_add_dyn_reloc (output_bfd
,
2835 bfinfdpic_gotrel_section (info
),
2836 offset
+ input_section
2837 ->output_section
->vma
2838 + input_section
->output_offset
,
2840 dynindx
, addend
, picrel
);
2843 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2846 /* We want the addend in-place because dynamic
2847 relocations are REL. Setting relocation to it should
2848 arrange for it to be installed. */
2849 relocation
= addend
- rel
->r_addend
;
2851 check_segment
[0] = check_segment
[1] = got_segment
;
2854 case R_BFIN_BYTE4_DATA
:
2855 if (! IS_FDPIC (output_bfd
))
2857 check_segment
[0] = check_segment
[1] = -1;
2861 case R_BFIN_FUNCDESC_VALUE
:
2864 bfd_vma addend
= rel
->r_addend
;
2866 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2867 input_section
, rel
->r_offset
);
2869 /* If the symbol is dynamic but binds locally, use
2871 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2873 if (addend
&& r_type
== R_BFIN_FUNCDESC_VALUE
)
2875 info
->callbacks
->warning
2876 (info
, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2877 name
, input_bfd
, input_section
, rel
->r_offset
);
2880 dynindx
= h
->dynindx
;
2885 addend
+= h
->root
.u
.def
.value
;
2887 addend
+= sym
->st_value
;
2889 addend
+= osec
->output_offset
;
2890 if (osec
&& osec
->output_section
2891 && ! bfd_is_abs_section (osec
->output_section
)
2892 && ! bfd_is_und_section (osec
->output_section
))
2893 dynindx
= elf_section_data (osec
->output_section
)->dynindx
;
2898 /* If we're linking an executable at a fixed address, we
2899 can omit the dynamic relocation as long as the symbol
2900 is defined in the current link unit (which is implied
2901 by its output section not being NULL). */
2902 if (bfd_link_pde (info
)
2903 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2906 addend
+= osec
->output_section
->vma
;
2907 if (IS_FDPIC (input_bfd
)
2908 && (bfd_section_flags (input_section
->output_section
)
2909 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2911 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2915 info
->callbacks
->warning
2917 _("cannot emit fixups in read-only section"),
2918 name
, input_bfd
, input_section
, rel
->r_offset
);
2921 if (!h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2923 if (offset
!= (bfd_vma
)-1)
2925 _bfinfdpic_add_rofixup (output_bfd
,
2926 bfinfdpic_gotfixup_section
2928 offset
+ input_section
2929 ->output_section
->vma
2930 + input_section
->output_offset
,
2933 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2934 _bfinfdpic_add_rofixup
2936 bfinfdpic_gotfixup_section (info
),
2937 offset
+ input_section
->output_section
->vma
2938 + input_section
->output_offset
+ 4, picrel
);
2945 if ((bfd_section_flags (input_section
->output_section
)
2946 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2948 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2952 info
->callbacks
->warning
2954 _("cannot emit dynamic relocations in read-only section"),
2955 name
, input_bfd
, input_section
, rel
->r_offset
);
2959 if (offset
!= (bfd_vma
)-1)
2960 _bfinfdpic_add_dyn_reloc (output_bfd
,
2961 bfinfdpic_gotrel_section (info
),
2963 + input_section
->output_section
->vma
2964 + input_section
->output_offset
,
2965 r_type
, dynindx
, addend
, picrel
);
2968 addend
+= osec
->output_section
->vma
;
2969 /* We want the addend in-place because dynamic
2970 relocations are REL. Setting relocation to it
2971 should arrange for it to be installed. */
2972 relocation
= addend
- rel
->r_addend
;
2975 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2977 /* If we've omitted the dynamic relocation, just emit
2978 the fixed addresses of the symbol and of the local
2980 if (bfd_link_pde (info
)
2981 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2982 bfd_put_32 (output_bfd
,
2983 bfinfdpic_got_section (info
)->output_section
->vma
2984 + bfinfdpic_got_section (info
)->output_offset
2985 + bfinfdpic_got_initial_offset (info
),
2986 contents
+ rel
->r_offset
+ 4);
2988 /* A function descriptor used for lazy or local
2989 resolving is initialized such that its high word
2990 contains the output section index in which the
2991 PLT entries are located, and the low word
2992 contains the offset of the lazy PLT entry entry
2993 point into that section. */
2994 bfd_put_32 (output_bfd
,
2995 h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2997 : _bfinfdpic_osec_to_segment (output_bfd
,
3000 contents
+ rel
->r_offset
+ 4);
3003 check_segment
[0] = check_segment
[1] = got_segment
;
3007 check_segment
[0] = isec_segment
;
3008 check_segment
[1] = sec
3009 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
3014 if (check_segment
[0] != check_segment
[1] && IS_FDPIC (output_bfd
))
3016 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3017 in the ld testsuite. */
3018 /* This helps catch problems in GCC while we can't do more
3019 than static linking. The idea is to test whether the
3020 input file basename is crt0.o only once. */
3021 if (silence_segment_error
== 1)
3022 silence_segment_error
=
3023 (strlen (bfd_get_filename (input_bfd
)) == 6
3024 && filename_cmp (bfd_get_filename (input_bfd
), "crt0.o") == 0)
3025 || (strlen (bfd_get_filename (input_bfd
)) > 6
3026 && filename_cmp (bfd_get_filename (input_bfd
)
3027 + strlen (bfd_get_filename (input_bfd
)) - 7,
3031 if (!silence_segment_error
3032 /* We don't want duplicate errors for undefined
3034 && !(picrel
&& picrel
->symndx
== -1
3035 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefined
))
3036 info
->callbacks
->warning
3039 ? _("relocations between different segments are not supported")
3040 : _("warning: relocation references a different segment"),
3041 name
, input_bfd
, input_section
, rel
->r_offset
);
3042 if (!silence_segment_error
&& bfd_link_pic (info
))
3044 elf_elfheader (output_bfd
)->e_flags
|= EF_BFIN_PIC
;
3049 case R_BFIN_GOTOFFHI
:
3050 /* We need the addend to be applied before we shift the
3052 relocation
+= rel
->r_addend
;
3055 case R_BFIN_FUNCDESC_GOTHI
:
3056 case R_BFIN_FUNCDESC_GOTOFFHI
:
3061 case R_BFIN_FUNCDESC_GOTLO
:
3062 case R_BFIN_GOTOFFLO
:
3063 case R_BFIN_FUNCDESC_GOTOFFLO
:
3064 relocation
&= 0xffff;
3073 case R_BFIN_PCREL24
:
3074 case R_BFIN_PCREL24_JUMP_L
:
3075 if (! IS_FDPIC (output_bfd
) || ! picrel
->plt
)
3079 /* When referencing a GOT entry, a function descriptor or a
3080 PLT, we don't want the addend to apply to the reference,
3081 but rather to the referenced symbol. The actual entry
3082 will have already been created taking the addend into
3083 account, so cancel it out here. */
3084 case R_BFIN_GOT17M4
:
3087 case R_BFIN_FUNCDESC_GOT17M4
:
3088 case R_BFIN_FUNCDESC_GOTHI
:
3089 case R_BFIN_FUNCDESC_GOTLO
:
3090 case R_BFIN_FUNCDESC_GOTOFF17M4
:
3091 case R_BFIN_FUNCDESC_GOTOFFHI
:
3092 case R_BFIN_FUNCDESC_GOTOFFLO
:
3093 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3094 here, since we do want to apply the addend to the others.
3095 Note that we've applied the addend to GOTOFFHI before we
3096 shifted it right. */
3097 case R_BFIN_GOTOFFHI
:
3098 relocation
-= rel
->r_addend
;
3105 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
3106 contents
, rel
->r_offset
,
3107 relocation
, rel
->r_addend
);
3109 if (r
!= bfd_reloc_ok
)
3111 const char * msg
= (const char *) NULL
;
3115 case bfd_reloc_overflow
:
3116 (*info
->callbacks
->reloc_overflow
)
3117 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3118 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3121 case bfd_reloc_undefined
:
3122 (*info
->callbacks
->undefined_symbol
)
3123 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
3126 case bfd_reloc_outofrange
:
3127 msg
= _("internal error: out of range error");
3130 case bfd_reloc_notsupported
:
3131 msg
= _("internal error: unsupported relocation error");
3134 case bfd_reloc_dangerous
:
3135 msg
= _("internal error: dangerous relocation");
3139 msg
= _("internal error: unknown error");
3144 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
3145 input_section
, rel
->r_offset
);
3152 /* We need dynamic symbols for every section, since segments can
3153 relocate independently. */
3155 _bfinfdpic_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3156 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3159 switch (elf_section_data (p
)->this_hdr
.sh_type
)
3163 /* If sh_type is yet undecided, assume it could be
3164 SHT_PROGBITS/SHT_NOBITS. */
3168 /* There shouldn't be section relative relocations
3169 against any other section. */
3175 /* Create a .got section, as well as its additional info field. This
3176 is almost entirely copied from
3177 elflink.c:_bfd_elf_create_got_section(). */
3180 _bfin_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
3182 flagword flags
, pltflags
;
3184 struct elf_link_hash_entry
*h
;
3185 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3188 /* This function may be called more than once. */
3189 s
= elf_hash_table (info
)->sgot
;
3193 /* Machine specific: although pointers are 32-bits wide, we want the
3194 GOT to be aligned to a 64-bit boundary, such that function
3195 descriptors in it can be accessed with 64-bit loads and
3199 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3200 | SEC_LINKER_CREATED
);
3203 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
3204 elf_hash_table (info
)->sgot
= s
;
3206 || !bfd_set_section_alignment (s
, ptralign
))
3209 if (bed
->want_got_sym
)
3211 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3212 (or .got.plt) section. We don't do this in the linker script
3213 because we don't want to define the symbol if we are not creating
3214 a global offset table. */
3215 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "__GLOBAL_OFFSET_TABLE_");
3216 elf_hash_table (info
)->hgot
= h
;
3220 /* Machine-specific: we want the symbol for executables as
3222 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3226 /* The first bit of the global offset table is the header. */
3227 s
->size
+= bed
->got_header_size
;
3229 /* This is the machine-specific part. Create and initialize section
3230 data for the got. */
3231 if (IS_FDPIC (abfd
))
3233 bfinfdpic_relocs_info (info
) = htab_try_create (1,
3234 bfinfdpic_relocs_info_hash
,
3235 bfinfdpic_relocs_info_eq
,
3237 if (! bfinfdpic_relocs_info (info
))
3240 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.got",
3241 (flags
| SEC_READONLY
));
3243 || !bfd_set_section_alignment (s
, 2))
3246 bfinfdpic_gotrel_section (info
) = s
;
3248 /* Machine-specific. */
3249 s
= bfd_make_section_anyway_with_flags (abfd
, ".rofixup",
3250 (flags
| SEC_READONLY
));
3252 || !bfd_set_section_alignment (s
, 2))
3255 bfinfdpic_gotfixup_section (info
) = s
;
3258 pltflags
|= SEC_CODE
;
3259 if (bed
->plt_not_loaded
)
3260 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
3261 if (bed
->plt_readonly
)
3262 pltflags
|= SEC_READONLY
;
3264 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
3266 || !bfd_set_section_alignment (s
, bed
->plt_alignment
))
3268 /* Blackfin-specific: remember it. */
3269 bfinfdpic_plt_section (info
) = s
;
3271 if (bed
->want_plt_sym
)
3273 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3275 struct bfd_link_hash_entry
*bh
= NULL
;
3277 if (! (_bfd_generic_link_add_one_symbol
3278 (info
, abfd
, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
, 0, NULL
,
3279 FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
3281 h
= (struct elf_link_hash_entry
*) bh
;
3283 h
->type
= STT_OBJECT
;
3285 if (! bfd_link_executable (info
)
3286 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3290 /* Blackfin-specific: we want rel relocations for the plt. */
3291 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.plt",
3292 flags
| SEC_READONLY
);
3294 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
3296 /* Blackfin-specific: remember it. */
3297 bfinfdpic_pltrel_section (info
) = s
;
3302 /* Make sure the got and plt sections exist, and that our pointers in
3303 the link hash table point to them. */
3306 elf32_bfinfdpic_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3308 /* This is mostly copied from
3309 elflink.c:_bfd_elf_create_dynamic_sections(). */
3312 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3314 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3315 | SEC_LINKER_CREATED
);
3317 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3318 .rel[a].bss sections. */
3320 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3321 if (! _bfin_create_got_section (abfd
, info
))
3324 /* Blackfin-specific: make sure we created everything we wanted. */
3325 BFD_ASSERT (bfinfdpic_got_section (info
) && bfinfdpic_gotrel_section (info
)
3326 /* && bfinfdpic_gotfixup_section (info) */
3327 && bfinfdpic_plt_section (info
)
3328 && bfinfdpic_pltrel_section (info
));
3330 if (bed
->want_dynbss
)
3332 /* The .dynbss section is a place to put symbols which are defined
3333 by dynamic objects, are referenced by regular objects, and are
3334 not functions. We must allocate space for them in the process
3335 image and use a R_*_COPY reloc to tell the dynamic linker to
3336 initialize them at run time. The linker script puts the .dynbss
3337 section into the .bss section of the final image. */
3338 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
3339 SEC_ALLOC
| SEC_LINKER_CREATED
);
3343 /* The .rel[a].bss section holds copy relocs. This section is not
3344 normally needed. We need to create it here, though, so that the
3345 linker will map it to an output section. We can't just create it
3346 only if we need it, because we will not know whether we need it
3347 until we have seen all the input files, and the first time the
3348 main linker code calls BFD after examining all the input files
3349 (size_dynamic_sections) the input sections have already been
3350 mapped to the output sections. If the section turns out not to
3351 be needed, we can discard it later. We will never need this
3352 section when generating a shared object, since they do not use
3354 if (! bfd_link_pic (info
))
3356 s
= bfd_make_section_anyway_with_flags (abfd
,
3358 flags
| SEC_READONLY
);
3360 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
3368 /* Compute the total GOT size required by each symbol in each range.
3369 Symbols may require up to 4 words in the GOT: an entry pointing to
3370 the symbol, an entry pointing to its function descriptor, and a
3371 private function descriptors taking two words. */
3374 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info
*entry
,
3375 struct _bfinfdpic_dynamic_got_info
*dinfo
)
3377 /* Allocate space for a GOT entry pointing to the symbol. */
3379 dinfo
->got17m4
+= 4;
3380 else if (entry
->gothilo
)
3381 dinfo
->gothilo
+= 4;
3386 /* Allocate space for a GOT entry pointing to the function
3388 if (entry
->fdgot17m4
)
3389 dinfo
->got17m4
+= 4;
3390 else if (entry
->fdgothilo
)
3391 dinfo
->gothilo
+= 4;
3396 /* Decide whether we need a PLT entry, a function descriptor in the
3397 GOT, and a lazy PLT entry for this symbol. */
3398 entry
->plt
= entry
->call
3399 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3400 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3401 entry
->privfd
= entry
->plt
3402 || entry
->fdgoff17m4
|| entry
->fdgoffhilo
3403 || ((entry
->fd
|| entry
->fdgot17m4
|| entry
->fdgothilo
)
3404 && (entry
->symndx
!= -1
3405 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
)));
3406 entry
->lazyplt
= entry
->privfd
3407 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3408 && ! (dinfo
->info
->flags
& DF_BIND_NOW
)
3409 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3411 /* Allocate space for a function descriptor. */
3412 if (entry
->fdgoff17m4
)
3414 else if (entry
->privfd
&& entry
->plt
)
3416 else if (entry
->privfd
)
3423 dinfo
->lzplt
+= LZPLT_NORMAL_SIZE
;
3426 /* Compute the number of dynamic relocations and fixups that a symbol
3427 requires, and add (or subtract) from the grand and per-symbol
3431 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info
*entry
,
3432 struct _bfinfdpic_dynamic_got_info
*dinfo
,
3433 bfd_boolean subtract
)
3435 bfd_vma relocs
= 0, fixups
= 0;
3437 if (!bfd_link_pde (dinfo
->info
))
3438 relocs
= entry
->relocs32
+ entry
->relocsfd
+ entry
->relocsfdv
;
3441 if (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
))
3443 if (entry
->symndx
!= -1
3444 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3445 fixups
+= entry
->relocs32
+ 2 * entry
->relocsfdv
;
3448 relocs
+= entry
->relocs32
+ entry
->relocsfdv
;
3450 if (entry
->symndx
!= -1
3451 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
))
3453 if (entry
->symndx
!= -1
3454 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3455 fixups
+= entry
->relocsfd
;
3458 relocs
+= entry
->relocsfd
;
3467 entry
->dynrelocs
+= relocs
;
3468 entry
->fixups
+= fixups
;
3469 dinfo
->relocs
+= relocs
;
3470 dinfo
->fixups
+= fixups
;
3473 /* Compute the total GOT and PLT size required by each symbol in each range. *
3474 Symbols may require up to 4 words in the GOT: an entry pointing to
3475 the symbol, an entry pointing to its function descriptor, and a
3476 private function descriptors taking two words. */
3479 _bfinfdpic_count_got_plt_entries (void **entryp
, void *dinfo_
)
3481 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3482 struct _bfinfdpic_dynamic_got_info
*dinfo
= dinfo_
;
3484 _bfinfdpic_count_nontls_entries (entry
, dinfo
);
3486 _bfinfdpic_count_relocs_fixups (entry
, dinfo
, FALSE
);
3491 /* This structure is used to assign offsets to got entries, function
3492 descriptors, plt entries and lazy plt entries. */
3494 struct _bfinfdpic_dynamic_got_plt_info
3496 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3497 struct _bfinfdpic_dynamic_got_info g
;
3499 /* For each addressable range, we record a MAX (positive) and MIN
3500 (negative) value. CUR is used to assign got entries, and it's
3501 incremented from an initial positive value to MAX, then from MIN
3502 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3503 assign function descriptors, and it's decreased from an initial
3504 non-positive value to MIN, then from MAX down to CUR (unless CUR
3505 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3506 to even words. ODD, if non-zero, indicates an odd word to be
3507 used for the next got entry, otherwise CUR is used and
3508 incremented by a pair of words, wrapping around when it reaches
3509 MAX. FDCUR is decremented (and wrapped) before the next function
3510 descriptor is chosen. FDPLT indicates the number of remaining
3511 slots that can be used for function descriptors used only by PLT
3513 struct _bfinfdpic_dynamic_got_alloc_data
3515 bfd_signed_vma max
, cur
, odd
, fdcur
, min
;
3520 /* Determine the positive and negative ranges to be used by each
3521 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3522 double-word boundary, are the minimum (negative) and maximum
3523 (positive) GOT offsets already used by previous ranges, except for
3524 an ODD entry that may have been left behind. GOT and FD indicate
3525 the size of GOT entries and function descriptors that must be
3526 placed within the range from -WRAP to WRAP. If there's room left,
3527 up to FDPLT bytes should be reserved for additional function
3530 inline static bfd_signed_vma
3531 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data
*gad
,
3532 bfd_signed_vma fdcur
,
3540 bfd_signed_vma wrapmin
= -wrap
;
3542 /* Start at the given initial points. */
3546 /* If we had an incoming odd word and we have any got entries that
3547 are going to use it, consume it, otherwise leave gad->odd at
3548 zero. We might force gad->odd to zero and return the incoming
3549 odd such that it is used by the next range, but then GOT entries
3550 might appear to be out of order and we wouldn't be able to
3551 shorten the GOT by one word if it turns out to end with an
3552 unpaired GOT entry. */
3562 /* If we're left with an unpaired GOT entry, compute its location
3563 such that we can return it. Otherwise, if got doesn't require an
3564 odd number of words here, either odd was already zero in the
3565 block above, or it was set to zero because got was non-zero, or
3566 got was already zero. In the latter case, we want the value of
3567 odd to carry over to the return statement, so we don't want to
3568 reset odd unless the condition below is true. */
3575 /* Compute the tentative boundaries of this range. */
3576 gad
->max
= cur
+ got
;
3577 gad
->min
= fdcur
- fd
;
3580 /* If function descriptors took too much space, wrap some of them
3582 if (gad
->min
< wrapmin
)
3584 gad
->max
+= wrapmin
- gad
->min
;
3587 /* If there is space left and we have function descriptors
3588 referenced in PLT entries that could take advantage of shorter
3589 offsets, place them here. */
3590 else if (fdplt
&& gad
->min
> wrapmin
)
3593 if ((bfd_vma
) (gad
->min
- wrapmin
) < fdplt
)
3594 fds
= gad
->min
- wrapmin
;
3603 /* If GOT entries took too much space, wrap some of them around.
3604 This may well cause gad->min to become lower than wrapmin. This
3605 will cause a relocation overflow later on, so we don't have to
3607 if ((bfd_vma
) gad
->max
> wrap
)
3609 gad
->min
-= gad
->max
- wrap
;
3612 /* If there is more space left, try to place some more function
3613 descriptors for PLT entries. */
3614 else if (fdplt
&& (bfd_vma
) gad
->max
< wrap
)
3617 if ((bfd_vma
) (wrap
- gad
->max
) < fdplt
)
3618 fds
= wrap
- gad
->max
;
3627 /* If odd was initially computed as an offset past the wrap point,
3630 odd
= gad
->min
+ odd
- gad
->max
;
3632 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3633 before returning, so do it here too. This guarantees that,
3634 should cur and fdcur meet at the wrap point, they'll both be
3636 if (gad
->cur
== gad
->max
)
3637 gad
->cur
= gad
->min
;
3642 /* Compute the location of the next GOT entry, given the allocation
3643 data for a range. */
3645 inline static bfd_signed_vma
3646 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3652 /* If there was an odd word left behind, use it. */
3658 /* Otherwise, use the word pointed to by cur, reserve the next
3659 as an odd word, and skip to the next pair of words, possibly
3662 gad
->odd
= gad
->cur
+ 4;
3664 if (gad
->cur
== gad
->max
)
3665 gad
->cur
= gad
->min
;
3671 /* Compute the location of the next function descriptor entry in the
3672 GOT, given the allocation data for a range. */
3674 inline static bfd_signed_vma
3675 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3677 /* If we're at the bottom, wrap around, and only then allocate the
3678 next pair of words. */
3679 if (gad
->fdcur
== gad
->min
)
3680 gad
->fdcur
= gad
->max
;
3681 return gad
->fdcur
-= 8;
3684 /* Assign GOT offsets for every GOT entry and function descriptor.
3685 Doing everything in a single pass is tricky. */
3688 _bfinfdpic_assign_got_entries (void **entryp
, void *info_
)
3690 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3691 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3694 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3695 else if (entry
->gothilo
)
3696 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3698 if (entry
->fdgot17m4
)
3699 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3700 else if (entry
->fdgothilo
)
3701 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3703 if (entry
->fdgoff17m4
)
3704 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3705 else if (entry
->plt
&& dinfo
->got17m4
.fdplt
)
3707 dinfo
->got17m4
.fdplt
-= 8;
3708 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3710 else if (entry
->plt
)
3712 dinfo
->gothilo
.fdplt
-= 8;
3713 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3715 else if (entry
->privfd
)
3716 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3721 /* Assign GOT offsets to private function descriptors used by PLT
3722 entries (or referenced by 32-bit offsets), as well as PLT entries
3723 and lazy PLT entries. */
3726 _bfinfdpic_assign_plt_entries (void **entryp
, void *info_
)
3728 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3729 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3731 /* If this symbol requires a local function descriptor, allocate
3733 if (entry
->privfd
&& entry
->fd_entry
== 0)
3735 if (dinfo
->got17m4
.fdplt
)
3737 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3738 dinfo
->got17m4
.fdplt
-= 8;
3742 BFD_ASSERT (dinfo
->gothilo
.fdplt
);
3743 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3744 dinfo
->gothilo
.fdplt
-= 8;
3752 /* We use the section's raw size to mark the location of the
3754 entry
->plt_entry
= bfinfdpic_plt_section (dinfo
->g
.info
)->size
;
3756 /* Figure out the length of this PLT entry based on the
3757 addressing mode we need to reach the function descriptor. */
3758 BFD_ASSERT (entry
->fd_entry
);
3759 if (entry
->fd_entry
>= -(1 << (18 - 1))
3760 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
3765 bfinfdpic_plt_section (dinfo
->g
.info
)->size
+= size
;
3770 entry
->lzplt_entry
= dinfo
->g
.lzplt
;
3771 dinfo
->g
.lzplt
+= LZPLT_NORMAL_SIZE
;
3772 /* If this entry is the one that gets the resolver stub, account
3773 for the additional instruction. */
3774 if (entry
->lzplt_entry
% BFINFDPIC_LZPLT_BLOCK_SIZE
3775 == BFINFDPIC_LZPLT_RESOLV_LOC
)
3776 dinfo
->g
.lzplt
+= LZPLT_RESOLVER_EXTRA
;
3782 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3783 _bfinfdpic_assign_plt_entries. */
3786 _bfinfdpic_reset_got_plt_entries (void **entryp
, void *ignore ATTRIBUTE_UNUSED
)
3788 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3790 entry
->got_entry
= 0;
3791 entry
->fdgot_entry
= 0;
3792 entry
->fd_entry
= 0;
3793 entry
->plt_entry
= (bfd_vma
)-1;
3794 entry
->lzplt_entry
= (bfd_vma
)-1;
3799 /* Follow indirect and warning hash entries so that each got entry
3800 points to the final symbol definition. P must point to a pointer
3801 to the hash table we're traversing. Since this traversal may
3802 modify the hash table, we set this pointer to NULL to indicate
3803 we've made a potentially-destructive change to the hash table, so
3804 the traversal must be restarted. */
3806 _bfinfdpic_resolve_final_relocs_info (void **entryp
, void *p
)
3808 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3811 if (entry
->symndx
== -1)
3813 struct elf_link_hash_entry
*h
= entry
->d
.h
;
3814 struct bfinfdpic_relocs_info
*oentry
;
3816 while (h
->root
.type
== bfd_link_hash_indirect
3817 || h
->root
.type
== bfd_link_hash_warning
)
3818 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
3820 if (entry
->d
.h
== h
)
3823 oentry
= bfinfdpic_relocs_info_for_global (*htab
, 0, h
, entry
->addend
,
3828 /* Merge the two entries. */
3829 bfinfdpic_pic_merge_early_relocs_info (oentry
, entry
);
3830 htab_clear_slot (*htab
, entryp
);
3836 /* If we can't find this entry with the new bfd hash, re-insert
3837 it, and get the traversal restarted. */
3838 if (! htab_find (*htab
, entry
))
3840 htab_clear_slot (*htab
, entryp
);
3841 entryp
= htab_find_slot (*htab
, entry
, INSERT
);
3844 /* Abort the traversal, since the whole table may have
3845 moved, and leave it up to the parent to restart the
3847 *(htab_t
*)p
= NULL
;
3855 /* Compute the total size of the GOT, the PLT, the dynamic relocations
3856 section and the rofixup section. Assign locations for GOT and PLT
3860 _bfinfdpic_size_got_plt (bfd
*output_bfd
,
3861 struct _bfinfdpic_dynamic_got_plt_info
*gpinfop
)
3865 struct bfd_link_info
*info
= gpinfop
->g
.info
;
3866 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
3868 memcpy (bfinfdpic_dynamic_got_plt_info (info
), &gpinfop
->g
,
3869 sizeof (gpinfop
->g
));
3872 /* Compute the total size taken by entries in the 18-bit range,
3873 to tell how many PLT function descriptors we can bring into it
3874 without causing it to overflow. */
3875 limit
= odd
+ gpinfop
->g
.got17m4
+ gpinfop
->g
.fd17m4
;
3876 if (limit
< (bfd_vma
)1 << 18)
3877 limit
= ((bfd_vma
)1 << 18) - limit
;
3880 if (gpinfop
->g
.fdplt
< limit
)
3881 limit
= gpinfop
->g
.fdplt
;
3883 /* Determine the ranges of GOT offsets that we can use for each
3884 range of addressing modes. */
3885 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->got17m4
,
3892 (bfd_vma
)1 << (18-1));
3893 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->gothilo
,
3894 gpinfop
->got17m4
.min
,
3896 gpinfop
->got17m4
.max
,
3899 gpinfop
->g
.fdplt
- gpinfop
->got17m4
.fdplt
,
3900 (bfd_vma
)1 << (32-1));
3902 /* Now assign (most) GOT offsets. */
3903 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_got_entries
,
3906 bfinfdpic_got_section (info
)->size
= gpinfop
->gothilo
.max
3907 - gpinfop
->gothilo
.min
3908 /* If an odd word is the last word of the GOT, we don't need this
3909 word to be part of the GOT. */
3910 - (odd
+ 4 == gpinfop
->gothilo
.max
? 4 : 0);
3911 if (bfinfdpic_got_section (info
)->size
== 0)
3912 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3913 else if (bfinfdpic_got_section (info
)->size
== 12
3914 && ! elf_hash_table (info
)->dynamic_sections_created
)
3916 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3917 bfinfdpic_got_section (info
)->size
= 0;
3921 bfinfdpic_got_section (info
)->contents
=
3922 (bfd_byte
*) bfd_zalloc (dynobj
,
3923 bfinfdpic_got_section (info
)->size
);
3924 if (bfinfdpic_got_section (info
)->contents
== NULL
)
3928 if (elf_hash_table (info
)->dynamic_sections_created
)
3929 /* Subtract the number of lzplt entries, since those will generate
3930 relocations in the pltrel section. */
3931 bfinfdpic_gotrel_section (info
)->size
=
3932 (gpinfop
->g
.relocs
- gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
)
3933 * get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3935 BFD_ASSERT (gpinfop
->g
.relocs
== 0);
3936 if (bfinfdpic_gotrel_section (info
)->size
== 0)
3937 bfinfdpic_gotrel_section (info
)->flags
|= SEC_EXCLUDE
;
3940 bfinfdpic_gotrel_section (info
)->contents
=
3941 (bfd_byte
*) bfd_zalloc (dynobj
,
3942 bfinfdpic_gotrel_section (info
)->size
);
3943 if (bfinfdpic_gotrel_section (info
)->contents
== NULL
)
3947 bfinfdpic_gotfixup_section (info
)->size
= (gpinfop
->g
.fixups
+ 1) * 4;
3948 if (bfinfdpic_gotfixup_section (info
)->size
== 0)
3949 bfinfdpic_gotfixup_section (info
)->flags
|= SEC_EXCLUDE
;
3952 bfinfdpic_gotfixup_section (info
)->contents
=
3953 (bfd_byte
*) bfd_zalloc (dynobj
,
3954 bfinfdpic_gotfixup_section (info
)->size
);
3955 if (bfinfdpic_gotfixup_section (info
)->contents
== NULL
)
3959 if (elf_hash_table (info
)->dynamic_sections_created
)
3960 bfinfdpic_pltrel_section (info
)->size
=
3961 gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
* get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3962 if (bfinfdpic_pltrel_section (info
)->size
== 0)
3963 bfinfdpic_pltrel_section (info
)->flags
|= SEC_EXCLUDE
;
3966 bfinfdpic_pltrel_section (info
)->contents
=
3967 (bfd_byte
*) bfd_zalloc (dynobj
,
3968 bfinfdpic_pltrel_section (info
)->size
);
3969 if (bfinfdpic_pltrel_section (info
)->contents
== NULL
)
3973 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
3974 such that there's room for the additional instruction needed to
3975 call the resolver. Since _bfinfdpic_assign_got_entries didn't
3976 account for them, our block size is 4 bytes smaller than the real
3978 if (elf_hash_table (info
)->dynamic_sections_created
)
3980 bfinfdpic_plt_section (info
)->size
= gpinfop
->g
.lzplt
3981 + ((gpinfop
->g
.lzplt
+ (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) - LZPLT_NORMAL_SIZE
)
3982 / (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) * LZPLT_RESOLVER_EXTRA
);
3985 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
3986 actually assign lazy PLT entries addresses. */
3987 gpinfop
->g
.lzplt
= 0;
3989 /* Save information that we're going to need to generate GOT and PLT
3991 bfinfdpic_got_initial_offset (info
) = -gpinfop
->gothilo
.min
;
3993 if (get_elf_backend_data (output_bfd
)->want_got_sym
)
3994 elf_hash_table (info
)->hgot
->root
.u
.def
.value
3995 = bfinfdpic_got_initial_offset (info
);
3997 if (elf_hash_table (info
)->dynamic_sections_created
)
3998 bfinfdpic_plt_initial_offset (info
) =
3999 bfinfdpic_plt_section (info
)->size
;
4001 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_plt_entries
,
4004 /* Allocate the PLT section contents only after
4005 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4006 non-lazy PLT entries. */
4007 if (bfinfdpic_plt_section (info
)->size
== 0)
4008 bfinfdpic_plt_section (info
)->flags
|= SEC_EXCLUDE
;
4011 bfinfdpic_plt_section (info
)->contents
=
4012 (bfd_byte
*) bfd_zalloc (dynobj
,
4013 bfinfdpic_plt_section (info
)->size
);
4014 if (bfinfdpic_plt_section (info
)->contents
== NULL
)
4021 /* Set the sizes of the dynamic sections. */
4024 elf32_bfinfdpic_size_dynamic_sections (bfd
*output_bfd
,
4025 struct bfd_link_info
*info
)
4027 struct elf_link_hash_table
*htab
;
4030 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4032 htab
= elf_hash_table (info
);
4033 dynobj
= htab
->dynobj
;
4034 BFD_ASSERT (dynobj
!= NULL
);
4036 if (htab
->dynamic_sections_created
)
4038 /* Set the contents of the .interp section to the interpreter. */
4039 if (bfd_link_executable (info
) && !info
->nointerp
)
4041 s
= bfd_get_linker_section (dynobj
, ".interp");
4042 BFD_ASSERT (s
!= NULL
);
4043 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
4044 s
->contents
= (bfd_byte
*) ELF_DYNAMIC_INTERPRETER
;
4048 memset (&gpinfo
, 0, sizeof (gpinfo
));
4049 gpinfo
.g
.info
= info
;
4053 htab_t relocs
= bfinfdpic_relocs_info (info
);
4055 htab_traverse (relocs
, _bfinfdpic_resolve_final_relocs_info
, &relocs
);
4057 if (relocs
== bfinfdpic_relocs_info (info
))
4061 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_count_got_plt_entries
,
4064 /* Allocate space to save the summary information, we're going to
4065 use it if we're doing relaxations. */
4066 bfinfdpic_dynamic_got_plt_info (info
) = bfd_alloc (dynobj
, sizeof (gpinfo
.g
));
4068 if (!_bfinfdpic_size_got_plt (output_bfd
, &gpinfo
))
4071 s
= bfd_get_linker_section (dynobj
, ".dynbss");
4072 if (s
&& s
->size
== 0)
4073 s
->flags
|= SEC_EXCLUDE
;
4075 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
4076 if (s
&& s
->size
== 0)
4077 s
->flags
|= SEC_EXCLUDE
;
4079 return _bfd_elf_add_dynamic_tags (output_bfd
, info
, TRUE
);
4083 elf32_bfinfdpic_always_size_sections (bfd
*output_bfd
,
4084 struct bfd_link_info
*info
)
4086 if (!bfd_link_relocatable (info
)
4087 && !bfd_elf_stack_segment_size (output_bfd
, info
,
4088 "__stacksize", DEFAULT_STACK_SIZE
))
4094 /* Check whether any of the relocations was optimized away, and
4095 subtract it from the relocation or fixup count. */
4097 _bfinfdpic_check_discarded_relocs (bfd
*abfd
, asection
*sec
,
4098 struct bfd_link_info
*info
,
4099 bfd_boolean
*changed
)
4101 Elf_Internal_Shdr
*symtab_hdr
;
4102 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
4103 Elf_Internal_Rela
*rel
, *erel
;
4105 if ((sec
->flags
& SEC_RELOC
) == 0
4106 || sec
->reloc_count
== 0)
4109 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4110 sym_hashes
= elf_sym_hashes (abfd
);
4111 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
4112 if (!elf_bad_symtab (abfd
))
4113 sym_hashes_end
-= symtab_hdr
->sh_info
;
4115 rel
= elf_section_data (sec
)->relocs
;
4117 /* Now examine each relocation. */
4118 for (erel
= rel
+ sec
->reloc_count
; rel
< erel
; rel
++)
4120 struct elf_link_hash_entry
*h
;
4121 unsigned long r_symndx
;
4122 struct bfinfdpic_relocs_info
*picrel
;
4123 struct _bfinfdpic_dynamic_got_info
*dinfo
;
4125 if (ELF32_R_TYPE (rel
->r_info
) != R_BFIN_BYTE4_DATA
4126 && ELF32_R_TYPE (rel
->r_info
) != R_BFIN_FUNCDESC
)
4129 if (_bfd_elf_section_offset (sec
->output_section
->owner
,
4130 info
, sec
, rel
->r_offset
)
4134 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4135 if (r_symndx
< symtab_hdr
->sh_info
)
4139 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4140 while (h
->root
.type
== bfd_link_hash_indirect
4141 || h
->root
.type
== bfd_link_hash_warning
)
4142 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
4146 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4148 rel
->r_addend
, NO_INSERT
);
4150 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info
),
4152 rel
->r_addend
, NO_INSERT
);
4158 dinfo
= bfinfdpic_dynamic_got_plt_info (info
);
4160 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, TRUE
);
4161 if (ELF32_R_TYPE (rel
->r_info
) == R_BFIN_BYTE4_DATA
)
4163 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4165 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, FALSE
);
4172 bfinfdpic_elf_discard_info (bfd
*ibfd
,
4173 struct elf_reloc_cookie
*cookie ATTRIBUTE_UNUSED
,
4174 struct bfd_link_info
*info
)
4176 bfd_boolean changed
= FALSE
;
4180 /* Account for relaxation of .eh_frame section. */
4181 for (s
= ibfd
->sections
; s
; s
= s
->next
)
4182 if (s
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4184 if (!_bfinfdpic_check_discarded_relocs (ibfd
, s
, info
, &changed
))
4186 obfd
= s
->output_section
->owner
;
4191 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4193 memset (&gpinfo
, 0, sizeof (gpinfo
));
4194 memcpy (&gpinfo
.g
, bfinfdpic_dynamic_got_plt_info (info
),
4197 /* Clear GOT and PLT assignments. */
4198 htab_traverse (bfinfdpic_relocs_info (info
),
4199 _bfinfdpic_reset_got_plt_entries
,
4202 if (!_bfinfdpic_size_got_plt (obfd
, &gpinfo
))
4210 elf32_bfinfdpic_finish_dynamic_sections (bfd
*output_bfd
,
4211 struct bfd_link_info
*info
)
4216 dynobj
= elf_hash_table (info
)->dynobj
;
4218 if (bfinfdpic_got_section (info
))
4220 BFD_ASSERT (bfinfdpic_gotrel_section (info
)->size
4221 /* PR 17334: It appears that the GOT section can end up
4222 being bigger than the number of relocs. Presumably
4223 because some relocs have been deleted. A test case has
4224 yet to be generated for verify this, but in the meantime
4225 the test below has been changed from == to >= so that
4226 applications can continue to be built. */
4227 >= (bfinfdpic_gotrel_section (info
)->reloc_count
4228 * sizeof (Elf32_External_Rel
)));
4230 if (bfinfdpic_gotfixup_section (info
))
4232 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
4233 bfd_vma got_value
= hgot
->root
.u
.def
.value
4234 + hgot
->root
.u
.def
.section
->output_section
->vma
4235 + hgot
->root
.u
.def
.section
->output_offset
;
4237 _bfinfdpic_add_rofixup (output_bfd
, bfinfdpic_gotfixup_section (info
),
4240 if (bfinfdpic_gotfixup_section (info
)->size
4241 != (bfinfdpic_gotfixup_section (info
)->reloc_count
* 4))
4244 ("LINKER BUG: .rofixup section size mismatch");
4249 if (elf_hash_table (info
)->dynamic_sections_created
)
4251 BFD_ASSERT (bfinfdpic_pltrel_section (info
)->size
4252 == (bfinfdpic_pltrel_section (info
)->reloc_count
4253 * sizeof (Elf32_External_Rel
)));
4256 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4258 if (elf_hash_table (info
)->dynamic_sections_created
)
4260 Elf32_External_Dyn
* dyncon
;
4261 Elf32_External_Dyn
* dynconend
;
4263 BFD_ASSERT (sdyn
!= NULL
);
4265 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4266 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4268 for (; dyncon
< dynconend
; dyncon
++)
4270 Elf_Internal_Dyn dyn
;
4272 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4280 dyn
.d_un
.d_ptr
= bfinfdpic_got_section (info
)->output_section
->vma
4281 + bfinfdpic_got_section (info
)->output_offset
4282 + bfinfdpic_got_initial_offset (info
);
4283 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4287 dyn
.d_un
.d_ptr
= bfinfdpic_pltrel_section (info
)
4288 ->output_section
->vma
4289 + bfinfdpic_pltrel_section (info
)->output_offset
;
4290 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4294 dyn
.d_un
.d_val
= bfinfdpic_pltrel_section (info
)->size
;
4295 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4304 /* Adjust a symbol defined by a dynamic object and referenced by a
4308 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4309 struct elf_link_hash_entry
*h
)
4313 dynobj
= elf_hash_table (info
)->dynobj
;
4315 /* Make sure we know what is going on here. */
4316 BFD_ASSERT (dynobj
!= NULL
4320 && !h
->def_regular
)));
4322 /* If this is a weak symbol, and there is a real definition, the
4323 processor independent code will have arranged for us to see the
4324 real definition first, and we can just use the same value. */
4325 if (h
->is_weakalias
)
4327 struct elf_link_hash_entry
*def
= weakdef (h
);
4328 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
4329 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
4330 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
4336 /* Perform any actions needed for dynamic symbols. */
4339 elf32_bfinfdpic_finish_dynamic_symbol
4340 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4341 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4342 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
4343 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4348 /* Decide whether to attempt to turn absptr or lsda encodings in
4349 shared libraries into pcrel within the given input section. */
4352 bfinfdpic_elf_use_relative_eh_frame
4353 (bfd
*input_bfd ATTRIBUTE_UNUSED
,
4354 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4355 asection
*eh_frame_section ATTRIBUTE_UNUSED
)
4357 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4361 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4364 bfinfdpic_elf_encode_eh_address (bfd
*abfd
,
4365 struct bfd_link_info
*info
,
4366 asection
*osec
, bfd_vma offset
,
4367 asection
*loc_sec
, bfd_vma loc_offset
,
4370 struct elf_link_hash_entry
*h
;
4372 h
= elf_hash_table (info
)->hgot
;
4373 BFD_ASSERT (h
&& h
->root
.type
== bfd_link_hash_defined
);
4375 if (! h
|| (_bfinfdpic_osec_to_segment (abfd
, osec
)
4376 == _bfinfdpic_osec_to_segment (abfd
, loc_sec
->output_section
)))
4377 return _bfd_elf_encode_eh_address (abfd
, info
, osec
, offset
,
4378 loc_sec
, loc_offset
, encoded
);
4380 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd
, osec
)
4381 == (_bfinfdpic_osec_to_segment
4382 (abfd
, h
->root
.u
.def
.section
->output_section
)));
4384 *encoded
= osec
->vma
+ offset
4385 - (h
->root
.u
.def
.value
4386 + h
->root
.u
.def
.section
->output_section
->vma
4387 + h
->root
.u
.def
.section
->output_offset
);
4389 return DW_EH_PE_datarel
| DW_EH_PE_sdata4
;
4394 /* Look through the relocs for a section during the first phase.
4396 Besides handling virtual table relocs for gc, we have to deal with
4397 all sorts of PIC-related relocations. We describe below the
4398 general plan on how to handle such relocations, even though we only
4399 collect information at this point, storing them in hash tables for
4400 perusal of later passes.
4402 32 relocations are propagated to the linker output when creating
4403 position-independent output. LO16 and HI16 relocations are not
4404 supposed to be encountered in this case.
4406 LABEL16 should always be resolvable by the linker, since it's only
4409 LABEL24, on the other hand, is used by calls. If it turns out that
4410 the target of a call is a dynamic symbol, a PLT entry must be
4411 created for it, which triggers the creation of a private function
4412 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4414 GPREL relocations require the referenced symbol to be in the same
4415 segment as _gp, but this can only be checked later.
4417 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4418 exist. LABEL24 might as well, since it may require a PLT entry,
4419 that will require a got.
4421 Non-FUNCDESC GOT relocations require a GOT entry to be created
4422 regardless of whether the symbol is dynamic. However, since a
4423 global symbol that turns out to not be exported may have the same
4424 address of a non-dynamic symbol, we don't assign GOT entries at
4425 this point, such that we can share them in this case. A relocation
4426 for the GOT entry always has to be created, be it to offset a
4427 private symbol by the section load address, be it to get the symbol
4428 resolved dynamically.
4430 FUNCDESC GOT relocations require a GOT entry to be created, and
4431 handled as if a FUNCDESC relocation was applied to the GOT entry in
4434 FUNCDESC relocations referencing a symbol that turns out to NOT be
4435 dynamic cause a private function descriptor to be created. The
4436 FUNCDESC relocation then decays to a 32 relocation that points at
4437 the private descriptor. If the symbol is dynamic, the FUNCDESC
4438 relocation is propagated to the linker output, such that the
4439 dynamic linker creates the canonical descriptor, pointing to the
4440 dynamically-resolved definition of the function.
4442 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4443 symbols that are assigned to the same segment as the GOT, but we
4444 can only check this later, after we know the complete set of
4445 symbols defined and/or exported.
4447 FUNCDESC GOTOFF relocations require a function descriptor to be
4448 created and, unless lazy binding is disabled or the symbol is not
4449 dynamic, a lazy PLT entry. Since we can't tell at this point
4450 whether a symbol is going to be dynamic, we have to decide later
4451 whether to create a lazy PLT entry or bind the descriptor directly
4452 to the private function.
4454 FUNCDESC_VALUE relocations are not supposed to be present in object
4455 files, but they may very well be simply propagated to the linker
4456 output, since they have no side effect.
4459 A function descriptor always requires a FUNCDESC_VALUE relocation.
4460 Whether it's in .plt.rel or not depends on whether lazy binding is
4461 enabled and on whether the referenced symbol is dynamic.
4463 The existence of a lazy PLT requires the resolverStub lazy PLT
4464 entry to be present.
4467 As for assignment of GOT, PLT and lazy PLT entries, and private
4468 descriptors, we might do them all sequentially, but we can do
4469 better than that. For example, we can place GOT entries and
4470 private function descriptors referenced using 12-bit operands
4471 closer to the PIC register value, such that these relocations don't
4472 overflow. Those that are only referenced with LO16 relocations
4473 could come next, but we may as well place PLT-required function
4474 descriptors in the 12-bit range to make them shorter. Symbols
4475 referenced with LO16/HI16 may come next, but we may place
4476 additional function descriptors in the 16-bit range if we can
4477 reliably tell that we've already placed entries that are ever
4478 referenced with only LO16. PLT entries are therefore generated as
4479 small as possible, while not introducing relocation overflows in
4480 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4481 generated before or after PLT entries, but not intermingled with
4482 them, such that we can have more lazy PLT entries in range for a
4483 branch to the resolverStub. The resolverStub should be emitted at
4484 the most distant location from the first lazy PLT entry such that
4485 it's still in range for a branch, or closer, if there isn't a need
4486 for so many lazy PLT entries. Additional lazy PLT entries may be
4487 emitted after the resolverStub, as long as branches are still in
4488 range. If the branch goes out of range, longer lazy PLT entries
4491 We could further optimize PLT and lazy PLT entries by giving them
4492 priority in assignment to closer-to-gr17 locations depending on the
4493 number of occurrences of references to them (assuming a function
4494 that's called more often is more important for performance, so its
4495 PLT entry should be faster), or taking hints from the compiler.
4496 Given infinite time and money... :-) */
4499 bfinfdpic_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4500 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4502 Elf_Internal_Shdr
*symtab_hdr
;
4503 struct elf_link_hash_entry
**sym_hashes
;
4504 const Elf_Internal_Rela
*rel
;
4505 const Elf_Internal_Rela
*rel_end
;
4507 struct bfinfdpic_relocs_info
*picrel
;
4509 if (bfd_link_relocatable (info
))
4512 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4513 sym_hashes
= elf_sym_hashes (abfd
);
4515 dynobj
= elf_hash_table (info
)->dynobj
;
4516 rel_end
= relocs
+ sec
->reloc_count
;
4517 for (rel
= relocs
; rel
< rel_end
; rel
++)
4519 struct elf_link_hash_entry
*h
;
4520 unsigned long r_symndx
;
4522 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4523 if (r_symndx
< symtab_hdr
->sh_info
)
4526 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4528 switch (ELF32_R_TYPE (rel
->r_info
))
4530 case R_BFIN_GOT17M4
:
4533 case R_BFIN_FUNCDESC_GOT17M4
:
4534 case R_BFIN_FUNCDESC_GOTHI
:
4535 case R_BFIN_FUNCDESC_GOTLO
:
4536 case R_BFIN_GOTOFF17M4
:
4537 case R_BFIN_GOTOFFHI
:
4538 case R_BFIN_GOTOFFLO
:
4539 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4540 case R_BFIN_FUNCDESC_GOTOFFHI
:
4541 case R_BFIN_FUNCDESC_GOTOFFLO
:
4542 case R_BFIN_FUNCDESC
:
4543 case R_BFIN_FUNCDESC_VALUE
:
4544 if (! IS_FDPIC (abfd
))
4547 case R_BFIN_PCREL24
:
4548 case R_BFIN_PCREL24_JUMP_L
:
4549 case R_BFIN_BYTE4_DATA
:
4550 if (IS_FDPIC (abfd
) && ! dynobj
)
4552 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4553 if (! _bfin_create_got_section (abfd
, info
))
4556 if (! IS_FDPIC (abfd
))
4563 if (h
->dynindx
== -1)
4564 switch (ELF_ST_VISIBILITY (h
->other
))
4570 bfd_elf_link_record_dynamic_symbol (info
, h
);
4574 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4576 rel
->r_addend
, INSERT
);
4579 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4580 (info
), abfd
, r_symndx
,
4581 rel
->r_addend
, INSERT
);
4591 switch (ELF32_R_TYPE (rel
->r_info
))
4593 case R_BFIN_PCREL24
:
4594 case R_BFIN_PCREL24_JUMP_L
:
4595 if (IS_FDPIC (abfd
))
4599 case R_BFIN_FUNCDESC_VALUE
:
4600 picrel
->relocsfdv
++;
4601 if (bfd_section_flags (sec
) & SEC_ALLOC
)
4605 case R_BFIN_BYTE4_DATA
:
4606 if (! IS_FDPIC (abfd
))
4610 if (bfd_section_flags (sec
) & SEC_ALLOC
)
4614 case R_BFIN_GOT17M4
:
4623 case R_BFIN_FUNCDESC_GOT17M4
:
4624 picrel
->fdgot17m4
++;
4627 case R_BFIN_FUNCDESC_GOTHI
:
4628 case R_BFIN_FUNCDESC_GOTLO
:
4629 picrel
->fdgothilo
++;
4632 case R_BFIN_GOTOFF17M4
:
4633 case R_BFIN_GOTOFFHI
:
4634 case R_BFIN_GOTOFFLO
:
4638 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4639 picrel
->fdgoff17m4
++;
4642 case R_BFIN_FUNCDESC_GOTOFFHI
:
4643 case R_BFIN_FUNCDESC_GOTOFFLO
:
4644 picrel
->fdgoffhilo
++;
4647 case R_BFIN_FUNCDESC
:
4652 /* This relocation describes the C++ object vtable hierarchy.
4653 Reconstruct it for later use during GC. */
4654 case R_BFIN_GNU_VTINHERIT
:
4655 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4659 /* This relocation describes which C++ vtable entries are actually
4660 used. Record for later use during GC. */
4661 case R_BFIN_GNU_VTENTRY
:
4662 BFD_ASSERT (h
!= NULL
);
4664 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4668 case R_BFIN_HUIMM16
:
4669 case R_BFIN_LUIMM16
:
4670 case R_BFIN_PCREL12_JUMP_S
:
4671 case R_BFIN_PCREL10
:
4677 /* xgettext:c-format */
4678 (_("%pB: unsupported relocation type %#x"),
4679 abfd
, (int) ELF32_R_TYPE (rel
->r_info
));
4687 /* Set the right machine number for a Blackfin ELF file. */
4690 elf32_bfin_object_p (bfd
*abfd
)
4692 bfd_default_set_arch_mach (abfd
, bfd_arch_bfin
, 0);
4693 return (((elf_elfheader (abfd
)->e_flags
& EF_BFIN_FDPIC
) != 0)
4694 == (IS_FDPIC (abfd
)));
4698 elf32_bfin_set_private_flags (bfd
* abfd
, flagword flags
)
4700 elf_elfheader (abfd
)->e_flags
= flags
;
4701 elf_flags_init (abfd
) = TRUE
;
4705 /* Display the flags field. */
4707 elf32_bfin_print_private_bfd_data (bfd
* abfd
, void * ptr
)
4709 FILE *file
= (FILE *) ptr
;
4712 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
4714 /* Print normal ELF private data. */
4715 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
4717 flags
= elf_elfheader (abfd
)->e_flags
;
4719 /* xgettext:c-format */
4720 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
4722 if (flags
& EF_BFIN_PIC
)
4723 fprintf (file
, " -fpic");
4725 if (flags
& EF_BFIN_FDPIC
)
4726 fprintf (file
, " -mfdpic");
4733 /* Merge backend specific data from an object file to the output
4734 object file when linking. */
4737 elf32_bfin_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
4739 bfd
*obfd
= info
->output_bfd
;
4740 flagword old_flags
, new_flags
;
4741 bfd_boolean error
= FALSE
;
4743 /* FIXME: What should be checked when linking shared libraries? */
4744 if ((ibfd
->flags
& DYNAMIC
) != 0)
4747 new_flags
= elf_elfheader (ibfd
)->e_flags
;
4748 old_flags
= elf_elfheader (obfd
)->e_flags
;
4750 if (new_flags
& EF_BFIN_FDPIC
)
4751 new_flags
&= ~EF_BFIN_PIC
;
4757 ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %pB",
4758 old_flags
, new_flags
, elf_flags_init (obfd
) ? "yes" : "no", ibfd
);
4760 if (!elf_flags_init (obfd
)) /* First call, no flags set. */
4762 elf_flags_init (obfd
) = TRUE
;
4763 elf_elfheader (obfd
)->e_flags
= new_flags
;
4766 if (((new_flags
& EF_BFIN_FDPIC
) == 0) != (! IS_FDPIC (obfd
)))
4769 if (IS_FDPIC (obfd
))
4771 (_("%pB: cannot link non-fdpic object file into fdpic executable"),
4775 (_("%pB: cannot link fdpic object file into non-fdpic executable"),
4780 bfd_set_error (bfd_error_bad_value
);
4785 /* bfin ELF linker hash entry. */
4787 struct bfin_link_hash_entry
4789 struct elf_link_hash_entry root
;
4791 /* Number of PC relative relocs copied for this symbol. */
4792 struct bfin_pcrel_relocs_copied
*pcrel_relocs_copied
;
4795 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4797 static struct bfd_hash_entry
*
4798 bfin_link_hash_newfunc (struct bfd_hash_entry
*entry
,
4799 struct bfd_hash_table
*table
, const char *string
)
4801 struct bfd_hash_entry
*ret
= entry
;
4803 /* Allocate the structure if it has not already been allocated by a
4806 ret
= bfd_hash_allocate (table
, sizeof (struct bfin_link_hash_entry
));
4810 /* Call the allocation method of the superclass. */
4811 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
4813 bfin_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
4818 /* Create an bfin ELF linker hash table. */
4820 static struct bfd_link_hash_table
*
4821 bfin_link_hash_table_create (bfd
* abfd
)
4823 struct elf_link_hash_table
*ret
;
4824 size_t amt
= sizeof (struct elf_link_hash_table
);
4826 ret
= bfd_zmalloc (amt
);
4830 if (!_bfd_elf_link_hash_table_init (ret
, abfd
, bfin_link_hash_newfunc
,
4831 sizeof (struct elf_link_hash_entry
),
4841 /* The size in bytes of an entry in the procedure linkage table. */
4843 /* Finish up the dynamic sections. */
4846 bfin_finish_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4847 struct bfd_link_info
*info
)
4852 dynobj
= elf_hash_table (info
)->dynobj
;
4854 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4856 if (elf_hash_table (info
)->dynamic_sections_created
)
4858 Elf32_External_Dyn
*dyncon
, *dynconend
;
4860 BFD_ASSERT (sdyn
!= NULL
);
4862 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4863 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4864 for (; dyncon
< dynconend
; dyncon
++)
4866 Elf_Internal_Dyn dyn
;
4868 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4876 /* Finish up dynamic symbol handling. We set the contents of various
4877 dynamic sections here. */
4880 bfin_finish_dynamic_symbol (bfd
* output_bfd
,
4881 struct bfd_link_info
*info
,
4882 struct elf_link_hash_entry
*h
,
4883 Elf_Internal_Sym
* sym
)
4885 if (h
->got
.offset
!= (bfd_vma
) - 1)
4889 Elf_Internal_Rela rela
;
4892 /* This symbol has an entry in the global offset table.
4895 sgot
= elf_hash_table (info
)->sgot
;
4896 srela
= elf_hash_table (info
)->srelgot
;
4897 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
4899 rela
.r_offset
= (sgot
->output_section
->vma
4900 + sgot
->output_offset
4901 + (h
->got
.offset
& ~(bfd_vma
) 1));
4903 /* If this is a -Bsymbolic link, and the symbol is defined
4904 locally, we just want to emit a RELATIVE reloc. Likewise if
4905 the symbol was forced to be local because of a version file.
4906 The entry in the global offset table will already have been
4907 initialized in the relocate_section function. */
4908 if (bfd_link_pic (info
)
4910 || h
->dynindx
== -1 || h
->forced_local
) && h
->def_regular
)
4912 _bfd_error_handler (_("*** check this relocation %s"),
4914 rela
.r_info
= ELF32_R_INFO (0, R_BFIN_PCREL24
);
4915 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
4919 offset
& ~(bfd_vma
) 1)));
4923 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4924 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
4925 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_BFIN_GOT
);
4929 loc
= srela
->contents
;
4930 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
4931 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
4938 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4939 if (strcmp (h
->root
.root
.string
, "__DYNAMIC") == 0
4940 || h
== elf_hash_table (info
)->hgot
)
4941 sym
->st_shndx
= SHN_ABS
;
4946 /* Adjust a symbol defined by a dynamic object and referenced by a
4947 regular object. The current definition is in some section of the
4948 dynamic object, but we're not including those sections. We have to
4949 change the definition to something the rest of the link can
4953 bfin_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4954 struct elf_link_hash_entry
*h
)
4958 unsigned int power_of_two
;
4960 dynobj
= elf_hash_table (info
)->dynobj
;
4962 /* Make sure we know what is going on here. */
4963 BFD_ASSERT (dynobj
!= NULL
4966 || (h
->def_dynamic
&& h
->ref_regular
&& !h
->def_regular
)));
4968 /* If this is a function, put it in the procedure linkage table. We
4969 will fill in the contents of the procedure linkage table later,
4970 when we know the address of the .got section. */
4971 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
4976 /* If this is a weak symbol, and there is a real definition, the
4977 processor independent code will have arranged for us to see the
4978 real definition first, and we can just use the same value. */
4979 if (h
->is_weakalias
)
4981 struct elf_link_hash_entry
*def
= weakdef (h
);
4982 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
4983 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
4984 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
4988 /* This is a reference to a symbol defined by a dynamic object which
4989 is not a function. */
4991 /* If we are creating a shared library, we must presume that the
4992 only references to the symbol are via the global offset table.
4993 For such cases we need not do anything here; the relocations will
4994 be handled correctly by relocate_section. */
4995 if (bfd_link_pic (info
))
4998 /* We must allocate the symbol in our .dynbss section, which will
4999 become part of the .bss section of the executable. There will be
5000 an entry for this symbol in the .dynsym section. The dynamic
5001 object will contain position independent code, so all references
5002 from the dynamic object to this symbol will go through the global
5003 offset table. The dynamic linker will use the .dynsym entry to
5004 determine the address it must put in the global offset table, so
5005 both the dynamic object and the regular object will refer to the
5006 same memory location for the variable. */
5008 s
= bfd_get_linker_section (dynobj
, ".dynbss");
5009 BFD_ASSERT (s
!= NULL
);
5011 #if 0 /* Bfin does not currently have a COPY reloc. */
5012 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to
5013 copy the initial value out of the dynamic object and into the
5014 runtime process image. We need to remember the offset into the
5015 .rela.bss section we are going to use. */
5016 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5020 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
5021 BFD_ASSERT (srel
!= NULL
);
5022 srel
->size
+= sizeof (Elf32_External_Rela
);
5026 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5028 _bfd_error_handler (_("the bfin target does not currently support the generation of copy relocations"));
5032 /* We need to figure out the alignment required for this symbol. I
5033 have no idea how ELF linkers handle this. */
5034 power_of_two
= bfd_log2 (h
->size
);
5035 if (power_of_two
> 3)
5038 /* Apply the required alignment. */
5039 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
5040 if (power_of_two
> bfd_section_alignment (s
))
5042 if (!bfd_set_section_alignment (s
, power_of_two
))
5046 /* Define the symbol as being at this point in the section. */
5047 h
->root
.u
.def
.section
= s
;
5048 h
->root
.u
.def
.value
= s
->size
;
5050 /* Increment the section size to make room for the symbol. */
5056 /* The bfin linker needs to keep track of the number of relocs that it
5057 decides to copy in check_relocs for each symbol. This is so that it
5058 can discard PC relative relocs if it doesn't need them when linking
5059 with -Bsymbolic. We store the information in a field extending the
5060 regular ELF linker hash table. */
5062 /* This structure keeps track of the number of PC relative relocs we have
5063 copied for a given symbol. */
5065 struct bfin_pcrel_relocs_copied
5068 struct bfin_pcrel_relocs_copied
*next
;
5069 /* A section in dynobj. */
5071 /* Number of relocs copied in this section. */
5072 bfd_size_type count
;
5075 /* This function is called via elf_link_hash_traverse if we are
5076 creating a shared object. In the -Bsymbolic case it discards the
5077 space allocated to copy PC relative relocs against symbols which
5078 are defined in regular objects. For the normal shared case, it
5079 discards space for pc-relative relocs that have become local due to
5080 symbol visibility changes. We allocated space for them in the
5081 check_relocs routine, but we won't fill them in in the
5082 relocate_section routine.
5084 We also check whether any of the remaining relocations apply
5085 against a readonly section, and set the DF_TEXTREL flag in this
5089 bfin_discard_copies (struct elf_link_hash_entry
*h
, void * inf
)
5091 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5092 struct bfin_pcrel_relocs_copied
*s
;
5094 if (!h
->def_regular
|| (!info
->symbolic
&& !h
->forced_local
))
5096 if ((info
->flags
& DF_TEXTREL
) == 0)
5098 /* Look for relocations against read-only sections. */
5099 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5100 s
!= NULL
; s
= s
->next
)
5101 if ((s
->section
->flags
& SEC_READONLY
) != 0)
5103 info
->flags
|= DF_TEXTREL
;
5111 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5112 s
!= NULL
; s
= s
->next
)
5113 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
5119 bfin_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
5120 struct bfd_link_info
*info
)
5126 dynobj
= elf_hash_table (info
)->dynobj
;
5127 BFD_ASSERT (dynobj
!= NULL
);
5129 if (elf_hash_table (info
)->dynamic_sections_created
)
5131 /* Set the contents of the .interp section to the interpreter. */
5132 if (bfd_link_executable (info
) && !info
->nointerp
)
5134 s
= bfd_get_linker_section (dynobj
, ".interp");
5135 BFD_ASSERT (s
!= NULL
);
5136 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5137 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5142 /* We may have created entries in the .rela.got section.
5143 However, if we are not creating the dynamic sections, we will
5144 not actually use these entries. Reset the size of .rela.got,
5145 which will cause it to get stripped from the output file
5147 s
= elf_hash_table (info
)->srelgot
;
5152 /* If this is a -Bsymbolic shared link, then we need to discard all
5153 PC relative relocs against symbols defined in a regular object.
5154 For the normal shared case we discard the PC relative relocs
5155 against symbols that have become local due to visibility changes.
5156 We allocated space for them in the check_relocs routine, but we
5157 will not fill them in in the relocate_section routine. */
5158 if (bfd_link_pic (info
))
5159 elf_link_hash_traverse (elf_hash_table (info
),
5160 bfin_discard_copies
, info
);
5162 /* The check_relocs and adjust_dynamic_symbol entry points have
5163 determined the sizes of the various dynamic sections. Allocate
5166 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5171 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5174 /* It's OK to base decisions on the section name, because none
5175 of the dynobj section names depend upon the input files. */
5176 name
= bfd_section_name (s
);
5180 if (CONST_STRNEQ (name
, ".rela"))
5184 /* If we don't need this section, strip it from the
5185 output file. This is mostly to handle .rela.bss and
5186 .rela.plt. We must create both sections in
5187 create_dynamic_sections, because they must be created
5188 before the linker maps input sections to output
5189 sections. The linker does that before
5190 adjust_dynamic_symbol is called, and it is that
5191 function which decides whether anything needs to go
5192 into these sections. */
5199 /* We use the reloc_count field as a counter if we need
5200 to copy relocs into the output file. */
5204 else if (! CONST_STRNEQ (name
, ".got"))
5206 /* It's not one of our sections, so don't allocate space. */
5212 s
->flags
|= SEC_EXCLUDE
;
5216 /* Allocate memory for the section contents. */
5217 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5218 Unused entries should be reclaimed before the section's contents
5219 are written out, but at the moment this does not happen. Thus in
5220 order to prevent writing out garbage, we initialise the section's
5221 contents to zero. */
5222 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
5223 if (s
->contents
== NULL
&& s
->size
!= 0)
5227 if (elf_hash_table (info
)->dynamic_sections_created
)
5229 /* Add some entries to the .dynamic section. We fill in the
5230 values later, in bfin_finish_dynamic_sections, but we
5231 must add the entries now so that we get the correct size for
5232 the .dynamic section. The DT_DEBUG entry is filled in by the
5233 dynamic linker and used by the debugger. */
5234 #define add_dynamic_entry(TAG, VAL) \
5235 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5237 if (!bfd_link_pic (info
))
5239 if (!add_dynamic_entry (DT_DEBUG
, 0))
5246 if (!add_dynamic_entry (DT_RELA
, 0)
5247 || !add_dynamic_entry (DT_RELASZ
, 0)
5248 || !add_dynamic_entry (DT_RELAENT
,
5249 sizeof (Elf32_External_Rela
)))
5253 if ((info
->flags
& DF_TEXTREL
) != 0)
5255 if (!add_dynamic_entry (DT_TEXTREL
, 0))
5259 #undef add_dynamic_entry
5264 /* Given a .data section and a .emreloc in-memory section, store
5265 relocation information into the .emreloc section which can be
5266 used at runtime to relocate the section. This is called by the
5267 linker when the --embedded-relocs switch is used. This is called
5268 after the add_symbols entry point has been called for all the
5269 objects, and before the final_link entry point is called. */
5272 bfd_bfin_elf32_create_embedded_relocs (bfd
*abfd
,
5273 struct bfd_link_info
*info
,
5278 Elf_Internal_Shdr
*symtab_hdr
;
5279 Elf_Internal_Sym
*isymbuf
= NULL
;
5280 Elf_Internal_Rela
*internal_relocs
= NULL
;
5281 Elf_Internal_Rela
*irel
, *irelend
;
5285 BFD_ASSERT (! bfd_link_relocatable (info
));
5289 if (datasec
->reloc_count
== 0)
5292 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5294 /* Get a copy of the native relocations. */
5295 internal_relocs
= (_bfd_elf_link_read_relocs
5296 (abfd
, datasec
, NULL
, (Elf_Internal_Rela
*) NULL
,
5297 info
->keep_memory
));
5298 if (internal_relocs
== NULL
)
5301 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
5302 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
5303 if (relsec
->contents
== NULL
)
5306 p
= relsec
->contents
;
5308 irelend
= internal_relocs
+ datasec
->reloc_count
;
5309 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
5311 asection
*targetsec
;
5313 /* We are going to write a four byte longword into the runtime
5314 reloc section. The longword will be the address in the data
5315 section which must be relocated. It is followed by the name
5316 of the target section NUL-padded or truncated to 8
5319 /* We can only relocate absolute longword relocs at run time. */
5320 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_BFIN_BYTE4_DATA
)
5322 *errmsg
= _("unsupported relocation type");
5323 bfd_set_error (bfd_error_bad_value
);
5327 /* Get the target section referred to by the reloc. */
5328 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
5330 /* A local symbol. */
5331 Elf_Internal_Sym
*isym
;
5333 /* Read this BFD's local symbols if we haven't done so already. */
5334 if (isymbuf
== NULL
)
5336 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5337 if (isymbuf
== NULL
)
5338 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
5339 symtab_hdr
->sh_info
, 0,
5341 if (isymbuf
== NULL
)
5345 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
5346 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5351 struct elf_link_hash_entry
*h
;
5353 /* An external symbol. */
5354 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
5355 h
= elf_sym_hashes (abfd
)[indx
];
5356 BFD_ASSERT (h
!= NULL
);
5357 if (h
->root
.type
== bfd_link_hash_defined
5358 || h
->root
.type
== bfd_link_hash_defweak
)
5359 targetsec
= h
->root
.u
.def
.section
;
5364 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
5365 memset (p
+ 4, 0, 8);
5366 if (targetsec
!= NULL
)
5367 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
5370 if (symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5372 if (elf_section_data (datasec
)->relocs
!= internal_relocs
)
5373 free (internal_relocs
);
5377 if (symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5379 if (elf_section_data (datasec
)->relocs
!= internal_relocs
)
5380 free (internal_relocs
);
5384 struct bfd_elf_special_section
const elf32_bfin_special_sections
[] =
5386 { ".l1.text", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
5387 { ".l1.data", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
5388 { NULL
, 0, 0, 0, 0 }
5392 #define TARGET_LITTLE_SYM bfin_elf32_vec
5393 #define TARGET_LITTLE_NAME "elf32-bfin"
5394 #define ELF_ARCH bfd_arch_bfin
5395 #define ELF_TARGET_ID BFIN_ELF_DATA
5396 #define ELF_MACHINE_CODE EM_BLACKFIN
5397 #define ELF_MAXPAGESIZE 0x1000
5398 #define elf_symbol_leading_char '_'
5400 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5401 #define bfd_elf32_bfd_reloc_name_lookup \
5402 bfin_bfd_reloc_name_lookup
5403 #define elf_info_to_howto bfin_info_to_howto
5404 #define elf_info_to_howto_rel NULL
5405 #define elf_backend_object_p elf32_bfin_object_p
5407 #define bfd_elf32_bfd_is_local_label_name \
5408 bfin_is_local_label_name
5410 #define elf_backend_create_dynamic_sections \
5411 _bfd_elf_create_dynamic_sections
5412 #define bfd_elf32_bfd_link_hash_table_create \
5413 bfin_link_hash_table_create
5414 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5416 #define elf_backend_check_relocs bfin_check_relocs
5417 #define elf_backend_adjust_dynamic_symbol \
5418 bfin_adjust_dynamic_symbol
5419 #define elf_backend_size_dynamic_sections \
5420 bfin_size_dynamic_sections
5421 #define elf_backend_relocate_section bfin_relocate_section
5422 #define elf_backend_finish_dynamic_symbol \
5423 bfin_finish_dynamic_symbol
5424 #define elf_backend_finish_dynamic_sections \
5425 bfin_finish_dynamic_sections
5426 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5427 #define bfd_elf32_bfd_merge_private_bfd_data \
5428 elf32_bfin_merge_private_bfd_data
5429 #define bfd_elf32_bfd_set_private_flags \
5430 elf32_bfin_set_private_flags
5431 #define bfd_elf32_bfd_print_private_bfd_data \
5432 elf32_bfin_print_private_bfd_data
5433 #define elf_backend_final_write_processing \
5434 elf32_bfin_final_write_processing
5435 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5436 #define elf_backend_stack_align 8
5437 #define elf_backend_can_gc_sections 1
5438 #define elf_backend_special_sections elf32_bfin_special_sections
5439 #define elf_backend_can_refcount 1
5440 #define elf_backend_want_got_plt 0
5441 #define elf_backend_plt_readonly 1
5442 #define elf_backend_want_plt_sym 0
5443 #define elf_backend_got_header_size 12
5444 #define elf_backend_rela_normal 1
5446 #include "elf32-target.h"
5448 #undef TARGET_LITTLE_SYM
5449 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5450 #undef TARGET_LITTLE_NAME
5451 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5453 #define elf32_bed elf32_bfinfdpic_bed
5455 #undef elf_backend_got_header_size
5456 #define elf_backend_got_header_size 0
5458 #undef elf_backend_relocate_section
5459 #define elf_backend_relocate_section bfinfdpic_relocate_section
5460 #undef elf_backend_check_relocs
5461 #define elf_backend_check_relocs bfinfdpic_check_relocs
5463 #undef bfd_elf32_bfd_link_hash_table_create
5464 #define bfd_elf32_bfd_link_hash_table_create \
5465 bfinfdpic_elf_link_hash_table_create
5466 #undef elf_backend_always_size_sections
5467 #define elf_backend_always_size_sections \
5468 elf32_bfinfdpic_always_size_sections
5470 #undef elf_backend_create_dynamic_sections
5471 #define elf_backend_create_dynamic_sections \
5472 elf32_bfinfdpic_create_dynamic_sections
5473 #undef elf_backend_adjust_dynamic_symbol
5474 #define elf_backend_adjust_dynamic_symbol \
5475 elf32_bfinfdpic_adjust_dynamic_symbol
5476 #undef elf_backend_size_dynamic_sections
5477 #define elf_backend_size_dynamic_sections \
5478 elf32_bfinfdpic_size_dynamic_sections
5479 #undef elf_backend_finish_dynamic_symbol
5480 #define elf_backend_finish_dynamic_symbol \
5481 elf32_bfinfdpic_finish_dynamic_symbol
5482 #undef elf_backend_finish_dynamic_sections
5483 #define elf_backend_finish_dynamic_sections \
5484 elf32_bfinfdpic_finish_dynamic_sections
5486 #undef elf_backend_discard_info
5487 #define elf_backend_discard_info \
5488 bfinfdpic_elf_discard_info
5489 #undef elf_backend_can_make_relative_eh_frame
5490 #define elf_backend_can_make_relative_eh_frame \
5491 bfinfdpic_elf_use_relative_eh_frame
5492 #undef elf_backend_can_make_lsda_relative_eh_frame
5493 #define elf_backend_can_make_lsda_relative_eh_frame \
5494 bfinfdpic_elf_use_relative_eh_frame
5495 #undef elf_backend_encode_eh_address
5496 #define elf_backend_encode_eh_address \
5497 bfinfdpic_elf_encode_eh_address
5499 #undef elf_backend_may_use_rel_p
5500 #define elf_backend_may_use_rel_p 1
5501 #undef elf_backend_may_use_rela_p
5502 #define elf_backend_may_use_rela_p 1
5503 /* We use REL for dynamic relocations only. */
5504 #undef elf_backend_default_use_rela_p
5505 #define elf_backend_default_use_rela_p 1
5507 #undef elf_backend_omit_section_dynsym
5508 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5510 #include "elf32-target.h"