1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2021 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
];
1200 while (h
->root
.type
== bfd_link_hash_indirect
1201 || h
->root
.type
== bfd_link_hash_warning
)
1202 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
1205 switch (ELF32_R_TYPE (rel
->r_info
))
1207 /* This relocation describes the C++ object vtable hierarchy.
1208 Reconstruct it for later use during GC. */
1209 case R_BFIN_GNU_VTINHERIT
:
1210 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1214 /* This relocation describes which C++ vtable entries
1215 are actually used. Record for later use during GC. */
1216 case R_BFIN_GNU_VTENTRY
:
1217 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1223 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1229 /* Create the .got section. */
1230 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1231 if (!_bfd_elf_create_got_section (dynobj
, info
))
1235 sgot
= elf_hash_table (info
)->sgot
;
1236 srelgot
= elf_hash_table (info
)->srelgot
;
1237 BFD_ASSERT (sgot
!= NULL
);
1241 if (h
->got
.refcount
== 0)
1243 /* Make sure this symbol is output as a dynamic symbol. */
1244 if (h
->dynindx
== -1 && !h
->forced_local
)
1246 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
1250 /* Allocate space in the .got section. */
1252 /* Allocate relocation space. */
1253 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1259 /* This is a global offset table entry for a local symbol. */
1260 if (local_got_refcounts
== NULL
)
1264 size
= symtab_hdr
->sh_info
;
1265 size
*= sizeof (bfd_signed_vma
);
1266 local_got_refcounts
= ((bfd_signed_vma
*)
1267 bfd_zalloc (abfd
, size
));
1268 if (local_got_refcounts
== NULL
)
1270 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1272 if (local_got_refcounts
[r_symndx
] == 0)
1275 if (bfd_link_pic (info
))
1277 /* If we are generating a shared object, we need to
1278 output a R_68K_RELATIVE reloc so that the dynamic
1279 linker can adjust this GOT entry. */
1280 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1283 local_got_refcounts
[r_symndx
]++;
1295 static enum elf_reloc_type_class
1296 elf32_bfin_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1297 const asection
*rel_sec ATTRIBUTE_UNUSED
,
1298 const Elf_Internal_Rela
* rela
)
1300 switch ((int) ELF32_R_TYPE (rela
->r_info
))
1303 return reloc_class_normal
;
1307 static bfd_reloc_status_type
1308 bfin_final_link_relocate (Elf_Internal_Rela
*rel
, reloc_howto_type
*howto
,
1309 bfd
*input_bfd
, asection
*input_section
,
1310 bfd_byte
*contents
, bfd_vma address
,
1311 bfd_vma value
, bfd_vma addend
)
1313 int r_type
= ELF32_R_TYPE (rel
->r_info
);
1315 if (r_type
== R_BFIN_PCREL24
|| r_type
== R_BFIN_PCREL24_JUMP_L
)
1317 bfd_reloc_status_type r
= bfd_reloc_ok
;
1320 if (address
> bfd_get_section_limit (input_bfd
, input_section
))
1321 return bfd_reloc_outofrange
;
1325 /* Perform usual pc-relative correction. */
1326 value
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
1329 /* We are getting reloc_entry->address 2 byte off from
1330 the start of instruction. Assuming absolute postion
1331 of the reloc data. But, following code had been written assuming
1332 reloc address is starting at begining of instruction.
1333 To compensate that I have increased the value of
1334 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1339 if ((value
& 0xFF000000) != 0
1340 && (value
& 0xFF000000) != 0xFF000000)
1341 r
= bfd_reloc_overflow
;
1345 x
= bfd_get_16 (input_bfd
, contents
+ address
);
1346 x
= (x
& 0xff00) | ((value
>> 16) & 0xff);
1347 bfd_put_16 (input_bfd
, x
, contents
+ address
);
1349 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
1351 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
1355 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
, contents
,
1356 rel
->r_offset
, value
, addend
);
1361 bfin_relocate_section (bfd
* output_bfd
,
1362 struct bfd_link_info
*info
,
1364 asection
* input_section
,
1365 bfd_byte
* contents
,
1366 Elf_Internal_Rela
* relocs
,
1367 Elf_Internal_Sym
* local_syms
,
1368 asection
** local_sections
)
1371 Elf_Internal_Shdr
*symtab_hdr
;
1372 struct elf_link_hash_entry
**sym_hashes
;
1373 bfd_vma
*local_got_offsets
;
1375 Elf_Internal_Rela
*rel
;
1376 Elf_Internal_Rela
*relend
;
1379 dynobj
= elf_hash_table (info
)->dynobj
;
1380 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1381 sym_hashes
= elf_sym_hashes (input_bfd
);
1382 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1387 relend
= relocs
+ input_section
->reloc_count
;
1388 for (; rel
< relend
; rel
++, i
++)
1391 reloc_howto_type
*howto
;
1392 unsigned long r_symndx
;
1393 struct elf_link_hash_entry
*h
;
1394 Elf_Internal_Sym
*sym
;
1396 bfd_vma relocation
= 0;
1397 bfd_boolean unresolved_reloc
;
1398 bfd_reloc_status_type r
;
1401 r_type
= ELF32_R_TYPE (rel
->r_info
);
1402 if (r_type
< 0 || r_type
>= 243)
1404 bfd_set_error (bfd_error_bad_value
);
1408 if (r_type
== R_BFIN_GNU_VTENTRY
1409 || r_type
== R_BFIN_GNU_VTINHERIT
)
1412 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
1415 bfd_set_error (bfd_error_bad_value
);
1418 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1423 unresolved_reloc
= FALSE
;
1425 if (r_symndx
< symtab_hdr
->sh_info
)
1427 sym
= local_syms
+ r_symndx
;
1428 sec
= local_sections
[r_symndx
];
1429 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1433 bfd_boolean warned
, ignored
;
1435 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1436 r_symndx
, symtab_hdr
, sym_hashes
,
1438 unresolved_reloc
, warned
, ignored
);
1441 if (sec
!= NULL
&& discarded_section (sec
))
1442 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1443 rel
, 1, relend
, howto
, 0, contents
);
1445 if (bfd_link_relocatable (info
))
1448 address
= rel
->r_offset
;
1450 /* Then, process normally. */
1453 case R_BFIN_GNU_VTINHERIT
:
1454 case R_BFIN_GNU_VTENTRY
:
1455 return bfd_reloc_ok
;
1458 /* Relocation is to the address of the entry for this symbol
1459 in the global offset table. */
1461 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1464 /* Relocation is the offset of the entry for this symbol in
1465 the global offset table. */
1472 /* Create the .got section. */
1473 elf_hash_table (info
)->dynobj
= dynobj
= output_bfd
;
1474 if (!_bfd_elf_create_got_section (dynobj
, info
))
1478 sgot
= elf_hash_table (info
)->sgot
;
1479 BFD_ASSERT (sgot
!= NULL
);
1485 off
= h
->got
.offset
;
1486 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1487 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
1489 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1490 bfd_link_pic (info
),
1492 || (bfd_link_pic (info
)
1498 /* This is actually a static link, or it is a
1499 -Bsymbolic link and the symbol is defined
1500 locally, or the symbol was forced to be local
1501 because of a version file.. We must initialize
1502 this entry in the global offset table. Since
1503 the offset must always be a multiple of 4, we
1504 use the least significant bit to record whether
1505 we have initialized it already.
1507 When doing a dynamic link, we create a .rela.got
1508 relocation entry to initialize the value. This
1509 is done in the finish_dynamic_symbol routine. */
1514 bfd_put_32 (output_bfd
, relocation
,
1515 sgot
->contents
+ off
);
1520 unresolved_reloc
= FALSE
;
1524 BFD_ASSERT (local_got_offsets
!= NULL
);
1525 off
= local_got_offsets
[r_symndx
];
1526 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1528 /* The offset must always be a multiple of 4. We use
1529 the least significant bit to record whether we have
1530 already generated the necessary reloc. */
1535 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1537 if (bfd_link_pic (info
))
1540 Elf_Internal_Rela outrel
;
1543 s
= elf_hash_table (info
)->srelgot
;
1544 BFD_ASSERT (s
!= NULL
);
1546 outrel
.r_offset
= (sgot
->output_section
->vma
1547 + sgot
->output_offset
+ off
);
1549 ELF32_R_INFO (0, R_BFIN_PCREL24
);
1550 outrel
.r_addend
= relocation
;
1553 s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1554 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1557 local_got_offsets
[r_symndx
] |= 1;
1561 relocation
= sgot
->output_offset
+ off
;
1563 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1570 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
1572 relocation
, rel
->r_addend
);
1577 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1578 because such sections are not SEC_ALLOC and thus ld.so will
1579 not process them. */
1580 if (unresolved_reloc
1581 && !((input_section
->flags
& SEC_DEBUGGING
) != 0 && h
->def_dynamic
)
1582 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1583 rel
->r_offset
) != (bfd_vma
) -1)
1586 /* xgettext:c-format */
1587 (_("%pB(%pA+%#" PRIx64
"): "
1588 "unresolvable relocation against symbol `%s'"),
1589 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
1590 h
->root
.root
.string
);
1594 if (r
!= bfd_reloc_ok
)
1599 name
= h
->root
.root
.string
;
1602 name
= bfd_elf_string_from_elf_section (input_bfd
,
1603 symtab_hdr
->sh_link
,
1608 name
= bfd_section_name (sec
);
1611 if (r
== bfd_reloc_overflow
)
1612 (*info
->callbacks
->reloc_overflow
)
1613 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1614 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1618 /* xgettext:c-format */
1619 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
1620 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
1631 bfin_gc_mark_hook (asection
* sec
,
1632 struct bfd_link_info
*info
,
1633 Elf_Internal_Rela
* rel
,
1634 struct elf_link_hash_entry
*h
,
1635 Elf_Internal_Sym
* sym
)
1638 switch (ELF32_R_TYPE (rel
->r_info
))
1640 case R_BFIN_GNU_VTINHERIT
:
1641 case R_BFIN_GNU_VTENTRY
:
1645 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1648 extern const bfd_target bfin_elf32_fdpic_vec
;
1649 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1651 /* An extension of the elf hash table data structure,
1652 containing some additional Blackfin-specific data. */
1653 struct bfinfdpic_elf_link_hash_table
1655 struct elf_link_hash_table elf
;
1657 /* A pointer to the .rofixup section. */
1658 asection
*sgotfixup
;
1659 /* GOT base offset. */
1661 /* Location of the first non-lazy PLT entry, i.e., the number of
1662 bytes taken by lazy PLT entries. */
1664 /* A hash table holding information about which symbols were
1665 referenced with which PIC-related relocations. */
1666 struct htab
*relocs_info
;
1667 /* Summary reloc information collected by
1668 _bfinfdpic_count_got_plt_entries. */
1669 struct _bfinfdpic_dynamic_got_info
*g
;
1672 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1674 #define bfinfdpic_hash_table(p) \
1675 ((is_elf_hash_table ((p)->hash) \
1676 && elf_hash_table_id (elf_hash_table (p)) == BFIN_ELF_DATA) \
1677 ? (struct bfinfdpic_elf_link_hash_table *) (p)->hash : NULL)
1679 #define bfinfdpic_got_section(info) \
1680 (bfinfdpic_hash_table (info)->elf.sgot)
1681 #define bfinfdpic_gotrel_section(info) \
1682 (bfinfdpic_hash_table (info)->elf.srelgot)
1683 #define bfinfdpic_gotfixup_section(info) \
1684 (bfinfdpic_hash_table (info)->sgotfixup)
1685 #define bfinfdpic_plt_section(info) \
1686 (bfinfdpic_hash_table (info)->elf.splt)
1687 #define bfinfdpic_pltrel_section(info) \
1688 (bfinfdpic_hash_table (info)->elf.srelplt)
1689 #define bfinfdpic_relocs_info(info) \
1690 (bfinfdpic_hash_table (info)->relocs_info)
1691 #define bfinfdpic_got_initial_offset(info) \
1692 (bfinfdpic_hash_table (info)->got0)
1693 #define bfinfdpic_plt_initial_offset(info) \
1694 (bfinfdpic_hash_table (info)->plt0)
1695 #define bfinfdpic_dynamic_got_plt_info(info) \
1696 (bfinfdpic_hash_table (info)->g)
1698 /* The name of the dynamic interpreter. This is put in the .interp
1701 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1703 #define DEFAULT_STACK_SIZE 0x20000
1705 /* This structure is used to collect the number of entries present in
1706 each addressable range of the got. */
1707 struct _bfinfdpic_dynamic_got_info
1709 /* Several bits of information about the current link. */
1710 struct bfd_link_info
*info
;
1711 /* Total size needed for GOT entries within the 18- or 32-bit
1713 bfd_vma got17m4
, gothilo
;
1714 /* Total size needed for function descriptor entries within the 18-
1715 or 32-bit ranges. */
1716 bfd_vma fd17m4
, fdhilo
;
1717 /* Total size needed function descriptor entries referenced in PLT
1718 entries, that would be profitable to place in offsets close to
1719 the PIC register. */
1721 /* Total size needed by lazy PLT entries. */
1723 /* Number of relocations carried over from input object files. */
1724 unsigned long relocs
;
1725 /* Number of fixups introduced by relocations in input object files. */
1726 unsigned long fixups
;
1729 /* Create a Blackfin ELF linker hash table. */
1731 static struct bfd_link_hash_table
*
1732 bfinfdpic_elf_link_hash_table_create (bfd
*abfd
)
1734 struct bfinfdpic_elf_link_hash_table
*ret
;
1735 size_t amt
= sizeof (struct bfinfdpic_elf_link_hash_table
);
1737 ret
= bfd_zmalloc (amt
);
1741 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1742 _bfd_elf_link_hash_newfunc
,
1743 sizeof (struct elf_link_hash_entry
),
1750 return &ret
->elf
.root
;
1753 /* Decide whether a reference to a symbol can be resolved locally or
1754 not. If the symbol is protected, we want the local address, but
1755 its function descriptor must be assigned by the dynamic linker. */
1756 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1757 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1758 || ! elf_hash_table (INFO)->dynamic_sections_created)
1759 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1760 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1762 /* This structure collects information on what kind of GOT, PLT or
1763 function descriptors are required by relocations that reference a
1765 struct bfinfdpic_relocs_info
1767 /* The index of the symbol, as stored in the relocation r_info, if
1768 we have a local symbol; -1 otherwise. */
1772 /* The input bfd in which the symbol is defined, if it's a local
1775 /* If symndx == -1, the hash table entry corresponding to a global
1776 symbol (even if it turns out to bind locally, in which case it
1777 should ideally be replaced with section's symndx + addend). */
1778 struct elf_link_hash_entry
*h
;
1780 /* The addend of the relocation that references the symbol. */
1783 /* The fields above are used to identify an entry. The fields below
1784 contain information on how an entry is used and, later on, which
1785 locations it was assigned. */
1786 /* The following 2 fields record whether the symbol+addend above was
1787 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1788 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1791 /* Whether a FUNCDESC relocation references symbol+addend. */
1793 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1796 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1797 unsigned fdgoff17m4
;
1798 unsigned fdgoffhilo
;
1799 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1800 GOTOFFHI relocations. The addend doesn't really matter, since we
1801 envision that this will only be used to check whether the symbol
1802 is mapped to the same segment as the got. */
1804 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1806 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1809 /* Whether we need a PLT entry for a symbol. Should be implied by
1811 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1813 /* Whether a function descriptor should be created in this link unit
1814 for symbol+addend. Should be implied by something like:
1815 (plt || fdgotoff17m4 || fdgotofflohi
1816 || ((fd || fdgot17m4 || fdgothilo)
1817 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1819 /* Whether a lazy PLT entry is needed for this symbol+addend.
1820 Should be implied by something like:
1821 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1822 && ! (info->flags & DF_BIND_NOW)) */
1824 /* Whether we've already emitted GOT relocations and PLT entries as
1825 needed for this symbol. */
1828 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1829 relocations referencing the symbol. */
1830 unsigned relocs32
, relocsfd
, relocsfdv
;
1832 /* The number of .rofixups entries and dynamic relocations allocated
1833 for this symbol, minus any that might have already been used. */
1834 unsigned fixups
, dynrelocs
;
1836 /* The offsets of the GOT entries assigned to symbol+addend, to the
1837 function descriptor's address, and to a function descriptor,
1838 respectively. Should be zero if unassigned. The offsets are
1839 counted from the value that will be assigned to the PIC register,
1840 not from the beginning of the .got section. */
1841 bfd_signed_vma got_entry
, fdgot_entry
, fd_entry
;
1842 /* The offsets of the PLT entries assigned to symbol+addend,
1843 non-lazy and lazy, respectively. If unassigned, should be
1845 bfd_vma plt_entry
, lzplt_entry
;
1848 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1850 bfinfdpic_relocs_info_hash (const void *entry_
)
1852 const struct bfinfdpic_relocs_info
*entry
= entry_
;
1854 return (entry
->symndx
== -1
1855 ? (long) entry
->d
.h
->root
.root
.hash
1856 : entry
->symndx
+ (long) entry
->d
.abfd
->id
* 257) + entry
->addend
;
1859 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1862 bfinfdpic_relocs_info_eq (const void *entry1
, const void *entry2
)
1864 const struct bfinfdpic_relocs_info
*e1
= entry1
;
1865 const struct bfinfdpic_relocs_info
*e2
= entry2
;
1867 return e1
->symndx
== e2
->symndx
&& e1
->addend
== e2
->addend
1868 && (e1
->symndx
== -1 ? e1
->d
.h
== e2
->d
.h
: e1
->d
.abfd
== e2
->d
.abfd
);
1871 /* Find or create an entry in a hash table HT that matches the key
1872 fields of the given ENTRY. If it's not found, memory for a new
1873 entry is allocated in ABFD's obstack. */
1874 static struct bfinfdpic_relocs_info
*
1875 bfinfdpic_relocs_info_find (struct htab
*ht
,
1877 const struct bfinfdpic_relocs_info
*entry
,
1878 enum insert_option insert
)
1880 struct bfinfdpic_relocs_info
**loc
;
1885 loc
= (struct bfinfdpic_relocs_info
**) htab_find_slot (ht
, entry
, insert
);
1893 *loc
= bfd_zalloc (abfd
, sizeof (**loc
));
1898 (*loc
)->symndx
= entry
->symndx
;
1899 (*loc
)->d
= entry
->d
;
1900 (*loc
)->addend
= entry
->addend
;
1901 (*loc
)->plt_entry
= (bfd_vma
)-1;
1902 (*loc
)->lzplt_entry
= (bfd_vma
)-1;
1907 /* Obtain the address of the entry in HT associated with H's symbol +
1908 addend, creating a new entry if none existed. ABFD is only used
1909 for memory allocation purposes. */
1910 inline static struct bfinfdpic_relocs_info
*
1911 bfinfdpic_relocs_info_for_global (struct htab
*ht
,
1913 struct elf_link_hash_entry
*h
,
1915 enum insert_option insert
)
1917 struct bfinfdpic_relocs_info entry
;
1921 entry
.addend
= addend
;
1923 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1926 /* Obtain the address of the entry in HT associated with the SYMNDXth
1927 local symbol of the input bfd ABFD, plus the addend, creating a new
1928 entry if none existed. */
1929 inline static struct bfinfdpic_relocs_info
*
1930 bfinfdpic_relocs_info_for_local (struct htab
*ht
,
1934 enum insert_option insert
)
1936 struct bfinfdpic_relocs_info entry
;
1938 entry
.symndx
= symndx
;
1939 entry
.d
.abfd
= abfd
;
1940 entry
.addend
= addend
;
1942 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1945 /* Merge fields set by check_relocs() of two entries that end up being
1946 mapped to the same (presumably global) symbol. */
1949 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info
*e2
,
1950 struct bfinfdpic_relocs_info
const *e1
)
1952 e2
->got17m4
|= e1
->got17m4
;
1953 e2
->gothilo
|= e1
->gothilo
;
1955 e2
->fdgot17m4
|= e1
->fdgot17m4
;
1956 e2
->fdgothilo
|= e1
->fdgothilo
;
1957 e2
->fdgoff17m4
|= e1
->fdgoff17m4
;
1958 e2
->fdgoffhilo
|= e1
->fdgoffhilo
;
1959 e2
->gotoff
|= e1
->gotoff
;
1960 e2
->call
|= e1
->call
;
1964 /* Every block of 65535 lazy PLT entries shares a single call to the
1965 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1966 32767, counting from 0). All other lazy PLT entries branch to it
1967 in a single instruction. */
1969 #define LZPLT_RESOLVER_EXTRA 10
1970 #define LZPLT_NORMAL_SIZE 6
1971 #define LZPLT_ENTRIES 1362
1973 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1974 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1976 /* Add a dynamic relocation to the SRELOC section. */
1978 inline static bfd_vma
1979 _bfinfdpic_add_dyn_reloc (bfd
*output_bfd
, asection
*sreloc
, bfd_vma offset
,
1980 int reloc_type
, long dynindx
, bfd_vma addend
,
1981 struct bfinfdpic_relocs_info
*entry
)
1983 Elf_Internal_Rela outrel
;
1984 bfd_vma reloc_offset
;
1986 outrel
.r_offset
= offset
;
1987 outrel
.r_info
= ELF32_R_INFO (dynindx
, reloc_type
);
1988 outrel
.r_addend
= addend
;
1990 reloc_offset
= sreloc
->reloc_count
* sizeof (Elf32_External_Rel
);
1991 BFD_ASSERT (reloc_offset
< sreloc
->size
);
1992 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1993 sreloc
->contents
+ reloc_offset
);
1994 sreloc
->reloc_count
++;
1996 /* If the entry's index is zero, this relocation was probably to a
1997 linkonce section that got discarded. We reserved a dynamic
1998 relocation, but it was for another entry than the one we got at
1999 the time of emitting the relocation. Unfortunately there's no
2000 simple way for us to catch this situation, since the relocation
2001 is cleared right before calling relocate_section, at which point
2002 we no longer know what the relocation used to point to. */
2005 BFD_ASSERT (entry
->dynrelocs
> 0);
2009 return reloc_offset
;
2012 /* Add a fixup to the ROFIXUP section. */
2015 _bfinfdpic_add_rofixup (bfd
*output_bfd
, asection
*rofixup
, bfd_vma offset
,
2016 struct bfinfdpic_relocs_info
*entry
)
2018 bfd_vma fixup_offset
;
2020 if (rofixup
->flags
& SEC_EXCLUDE
)
2023 fixup_offset
= rofixup
->reloc_count
* 4;
2024 if (rofixup
->contents
)
2026 BFD_ASSERT (fixup_offset
< rofixup
->size
);
2027 bfd_put_32 (output_bfd
, offset
, rofixup
->contents
+ fixup_offset
);
2029 rofixup
->reloc_count
++;
2031 if (entry
&& entry
->symndx
)
2033 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2035 BFD_ASSERT (entry
->fixups
> 0);
2039 return fixup_offset
;
2042 /* Find the segment number in which OSEC, and output section, is
2046 _bfinfdpic_osec_to_segment (bfd
*output_bfd
, asection
*osec
)
2048 Elf_Internal_Phdr
*p
= _bfd_elf_find_segment_containing_section (output_bfd
, osec
);
2050 return (p
!= NULL
) ? p
- elf_tdata (output_bfd
)->phdr
: -1;
2053 inline static bfd_boolean
2054 _bfinfdpic_osec_readonly_p (bfd
*output_bfd
, asection
*osec
)
2056 unsigned seg
= _bfinfdpic_osec_to_segment (output_bfd
, osec
);
2058 return ! (elf_tdata (output_bfd
)->phdr
[seg
].p_flags
& PF_W
);
2061 /* Generate relocations for GOT entries, function descriptors, and
2062 code for PLT and lazy PLT entries. */
2064 inline static bfd_boolean
2065 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info
*entry
,
2067 struct bfd_link_info
*info
,
2069 Elf_Internal_Sym
*sym
,
2072 bfd_vma fd_lazy_rel_offset
= (bfd_vma
) -1;
2079 if (entry
->got_entry
|| entry
->fdgot_entry
|| entry
->fd_entry
)
2081 /* If the symbol is dynamic, consider it for dynamic
2082 relocations, otherwise decay to section + offset. */
2083 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1)
2084 dynindx
= entry
->d
.h
->dynindx
;
2088 && sec
->output_section
2089 && ! bfd_is_abs_section (sec
->output_section
)
2090 && ! bfd_is_und_section (sec
->output_section
))
2091 dynindx
= elf_section_data (sec
->output_section
)->dynindx
;
2097 /* Generate relocation for GOT entry pointing to the symbol. */
2098 if (entry
->got_entry
)
2101 bfd_vma ad
= addend
;
2103 /* If the symbol is dynamic but binds locally, use
2105 if (sec
&& (entry
->symndx
!= -1
2106 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2108 if (entry
->symndx
== -1)
2109 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2111 ad
+= sym
->st_value
;
2112 ad
+= sec
->output_offset
;
2113 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2114 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2119 /* If we're linking an executable at a fixed address, we can
2120 omit the dynamic relocation as long as the symbol is local to
2122 if (bfd_link_pde (info
)
2123 && (entry
->symndx
!= -1
2124 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2127 ad
+= sec
->output_section
->vma
;
2128 if (entry
->symndx
!= -1
2129 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2130 _bfinfdpic_add_rofixup (output_bfd
,
2131 bfinfdpic_gotfixup_section (info
),
2132 bfinfdpic_got_section (info
)->output_section
2134 + bfinfdpic_got_section (info
)->output_offset
2135 + bfinfdpic_got_initial_offset (info
)
2136 + entry
->got_entry
, entry
);
2139 _bfinfdpic_add_dyn_reloc (output_bfd
, bfinfdpic_gotrel_section (info
),
2140 _bfd_elf_section_offset
2142 bfinfdpic_got_section (info
),
2143 bfinfdpic_got_initial_offset (info
)
2145 + bfinfdpic_got_section (info
)
2146 ->output_section
->vma
2147 + bfinfdpic_got_section (info
)->output_offset
,
2148 R_BFIN_BYTE4_DATA
, idx
, ad
, entry
);
2150 bfd_put_32 (output_bfd
, ad
,
2151 bfinfdpic_got_section (info
)->contents
2152 + bfinfdpic_got_initial_offset (info
)
2153 + entry
->got_entry
);
2156 /* Generate relocation for GOT entry pointing to a canonical
2157 function descriptor. */
2158 if (entry
->fdgot_entry
)
2163 if (! (entry
->symndx
== -1
2164 && entry
->d
.h
->root
.type
== bfd_link_hash_undefweak
2165 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2167 /* If the symbol is dynamic and there may be dynamic symbol
2168 resolution because we are, or are linked with, a shared
2169 library, emit a FUNCDESC relocation such that the dynamic
2170 linker will allocate the function descriptor. If the
2171 symbol needs a non-local function descriptor but binds
2172 locally (e.g., its visibility is protected, emit a
2173 dynamic relocation decayed to section+offset. */
2174 if (entry
->symndx
== -1
2175 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)
2176 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)
2177 && !bfd_link_pde (info
))
2179 reloc
= R_BFIN_FUNCDESC
;
2180 idx
= elf_section_data (entry
->d
.h
->root
.u
.def
.section
2181 ->output_section
)->dynindx
;
2182 ad
= entry
->d
.h
->root
.u
.def
.section
->output_offset
2183 + entry
->d
.h
->root
.u
.def
.value
;
2185 else if (entry
->symndx
== -1
2186 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
))
2188 reloc
= R_BFIN_FUNCDESC
;
2196 /* Otherwise, we know we have a private function descriptor,
2197 so reference it directly. */
2198 if (elf_hash_table (info
)->dynamic_sections_created
)
2199 BFD_ASSERT (entry
->privfd
);
2200 reloc
= R_BFIN_BYTE4_DATA
;
2201 idx
= elf_section_data (bfinfdpic_got_section (info
)
2202 ->output_section
)->dynindx
;
2203 ad
= bfinfdpic_got_section (info
)->output_offset
2204 + bfinfdpic_got_initial_offset (info
) + entry
->fd_entry
;
2207 /* If there is room for dynamic symbol resolution, emit the
2208 dynamic relocation. However, if we're linking an
2209 executable at a fixed location, we won't have emitted a
2210 dynamic symbol entry for the got section, so idx will be
2211 zero, which means we can and should compute the address
2212 of the private descriptor ourselves. */
2213 if (bfd_link_pde (info
)
2214 && (entry
->symndx
!= -1
2215 || BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)))
2217 ad
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2218 _bfinfdpic_add_rofixup (output_bfd
,
2219 bfinfdpic_gotfixup_section (info
),
2220 bfinfdpic_got_section (info
)
2221 ->output_section
->vma
2222 + bfinfdpic_got_section (info
)
2224 + bfinfdpic_got_initial_offset (info
)
2225 + entry
->fdgot_entry
, entry
);
2228 _bfinfdpic_add_dyn_reloc (output_bfd
,
2229 bfinfdpic_gotrel_section (info
),
2230 _bfd_elf_section_offset
2232 bfinfdpic_got_section (info
),
2233 bfinfdpic_got_initial_offset (info
)
2234 + entry
->fdgot_entry
)
2235 + bfinfdpic_got_section (info
)
2236 ->output_section
->vma
2237 + bfinfdpic_got_section (info
)
2239 reloc
, idx
, ad
, entry
);
2242 bfd_put_32 (output_bfd
, ad
,
2243 bfinfdpic_got_section (info
)->contents
2244 + bfinfdpic_got_initial_offset (info
)
2245 + entry
->fdgot_entry
);
2248 /* Generate relocation to fill in a private function descriptor in
2250 if (entry
->fd_entry
)
2253 bfd_vma ad
= addend
;
2255 long lowword
, highword
;
2257 /* If the symbol is dynamic but binds locally, use
2259 if (sec
&& (entry
->symndx
!= -1
2260 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2262 if (entry
->symndx
== -1)
2263 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2265 ad
+= sym
->st_value
;
2266 ad
+= sec
->output_offset
;
2267 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2268 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2273 /* If we're linking an executable at a fixed address, we can
2274 omit the dynamic relocation as long as the symbol is local to
2276 if (bfd_link_pde (info
)
2277 && (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2280 ad
+= sec
->output_section
->vma
;
2282 if (entry
->symndx
!= -1
2283 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2285 _bfinfdpic_add_rofixup (output_bfd
,
2286 bfinfdpic_gotfixup_section (info
),
2287 bfinfdpic_got_section (info
)
2288 ->output_section
->vma
2289 + bfinfdpic_got_section (info
)
2291 + bfinfdpic_got_initial_offset (info
)
2292 + entry
->fd_entry
, entry
);
2293 _bfinfdpic_add_rofixup (output_bfd
,
2294 bfinfdpic_gotfixup_section (info
),
2295 bfinfdpic_got_section (info
)
2296 ->output_section
->vma
2297 + bfinfdpic_got_section (info
)
2299 + bfinfdpic_got_initial_offset (info
)
2300 + entry
->fd_entry
+ 4, entry
);
2306 = _bfinfdpic_add_dyn_reloc (output_bfd
,
2308 ? bfinfdpic_pltrel_section (info
)
2309 : bfinfdpic_gotrel_section (info
),
2310 _bfd_elf_section_offset
2312 bfinfdpic_got_section (info
),
2313 bfinfdpic_got_initial_offset (info
)
2315 + bfinfdpic_got_section (info
)
2316 ->output_section
->vma
2317 + bfinfdpic_got_section (info
)
2319 R_BFIN_FUNCDESC_VALUE
, idx
, ad
, entry
);
2322 /* If we've omitted the dynamic relocation, just emit the fixed
2323 addresses of the symbol and of the local GOT base offset. */
2324 if (bfd_link_pde (info
)
2326 && sec
->output_section
)
2329 highword
= bfinfdpic_got_section (info
)->output_section
->vma
2330 + bfinfdpic_got_section (info
)->output_offset
2331 + bfinfdpic_got_initial_offset (info
);
2333 else if (entry
->lazyplt
)
2338 fd_lazy_rel_offset
= ofst
;
2340 /* A function descriptor used for lazy or local resolving is
2341 initialized such that its high word contains the output
2342 section index in which the PLT entries are located, and
2343 the low word contains the address of the lazy PLT entry
2344 entry point, that must be within the memory region
2345 assigned to that section. */
2346 lowword
= entry
->lzplt_entry
+ 4
2347 + bfinfdpic_plt_section (info
)->output_offset
2348 + bfinfdpic_plt_section (info
)->output_section
->vma
;
2349 highword
= _bfinfdpic_osec_to_segment
2350 (output_bfd
, bfinfdpic_plt_section (info
)->output_section
);
2354 /* A function descriptor for a local function gets the index
2355 of the section. For a non-local function, it's
2359 || (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1
2360 && entry
->d
.h
->dynindx
== idx
))
2363 highword
= _bfinfdpic_osec_to_segment
2364 (output_bfd
, sec
->output_section
);
2367 bfd_put_32 (output_bfd
, lowword
,
2368 bfinfdpic_got_section (info
)->contents
2369 + bfinfdpic_got_initial_offset (info
)
2371 bfd_put_32 (output_bfd
, highword
,
2372 bfinfdpic_got_section (info
)->contents
2373 + bfinfdpic_got_initial_offset (info
)
2374 + entry
->fd_entry
+ 4);
2377 /* Generate code for the PLT entry. */
2378 if (entry
->plt_entry
!= (bfd_vma
) -1)
2380 bfd_byte
*plt_code
= bfinfdpic_plt_section (info
)->contents
2383 BFD_ASSERT (entry
->fd_entry
);
2385 /* Figure out what kind of PLT entry we need, depending on the
2386 location of the function descriptor within the GOT. */
2387 if (entry
->fd_entry
>= -(1 << (18 - 1))
2388 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
2390 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2391 bfd_put_32 (output_bfd
,
2392 0xe519 | ((entry
->fd_entry
<< 14) & 0xFFFF0000),
2394 bfd_put_32 (output_bfd
,
2395 0xe51b | (((entry
->fd_entry
+ 4) << 14) & 0xFFFF0000),
2401 /* P1.L = fd_entry; P1.H = fd_entry;
2405 bfd_put_32 (output_bfd
,
2406 0xe109 | (entry
->fd_entry
<< 16),
2408 bfd_put_32 (output_bfd
,
2409 0xe149 | (entry
->fd_entry
& 0xFFFF0000),
2411 bfd_put_16 (output_bfd
, 0x5ad9, plt_code
+ 8);
2412 bfd_put_16 (output_bfd
, 0x9159, plt_code
+ 10);
2413 bfd_put_16 (output_bfd
, 0xac5b, plt_code
+ 12);
2417 bfd_put_16 (output_bfd
, 0x0051, plt_code
);
2420 /* Generate code for the lazy PLT entry. */
2421 if (entry
->lzplt_entry
!= (bfd_vma
) -1)
2423 bfd_byte
*lzplt_code
= bfinfdpic_plt_section (info
)->contents
2424 + entry
->lzplt_entry
;
2425 bfd_vma resolverStub_addr
;
2427 bfd_put_32 (output_bfd
, fd_lazy_rel_offset
, lzplt_code
);
2430 resolverStub_addr
= entry
->lzplt_entry
/ BFINFDPIC_LZPLT_BLOCK_SIZE
2431 * BFINFDPIC_LZPLT_BLOCK_SIZE
+ BFINFDPIC_LZPLT_RESOLV_LOC
;
2432 if (resolverStub_addr
>= bfinfdpic_plt_initial_offset (info
))
2433 resolverStub_addr
= bfinfdpic_plt_initial_offset (info
) - LZPLT_NORMAL_SIZE
- LZPLT_RESOLVER_EXTRA
;
2435 if (entry
->lzplt_entry
== resolverStub_addr
)
2437 /* This is a lazy PLT entry that includes a resolver call.
2441 bfd_put_32 (output_bfd
,
2444 bfd_put_16 (output_bfd
, 0x0052, lzplt_code
+ 4);
2448 /* JUMP.S resolverStub */
2449 bfd_put_16 (output_bfd
,
2451 | (((resolverStub_addr
- entry
->lzplt_entry
)
2452 / 2) & (((bfd_vma
)1 << 12) - 1)),
2460 /* Relocate an Blackfin ELF section.
2462 The RELOCATE_SECTION function is called by the new ELF backend linker
2463 to handle the relocations for a section.
2465 The relocs are always passed as Rela structures; if the section
2466 actually uses Rel structures, the r_addend field will always be
2469 This function is responsible for adjusting the section contents as
2470 necessary, and (if using Rela relocs and generating a relocatable
2471 output file) adjusting the reloc addend as necessary.
2473 This function does not have to worry about setting the reloc
2474 address or the reloc symbol index.
2476 LOCAL_SYMS is a pointer to the swapped in local symbols.
2478 LOCAL_SECTIONS is an array giving the section in the input file
2479 corresponding to the st_shndx field of each local symbol.
2481 The global hash table entry for the global symbols can be found
2482 via elf_sym_hashes (input_bfd).
2484 When generating relocatable output, this function must handle
2485 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2486 going to be the section symbol corresponding to the output
2487 section, which means that the addend must be adjusted
2491 bfinfdpic_relocate_section (bfd
* output_bfd
,
2492 struct bfd_link_info
*info
,
2494 asection
* input_section
,
2495 bfd_byte
* contents
,
2496 Elf_Internal_Rela
* relocs
,
2497 Elf_Internal_Sym
* local_syms
,
2498 asection
** local_sections
)
2500 Elf_Internal_Shdr
*symtab_hdr
;
2501 struct elf_link_hash_entry
**sym_hashes
;
2502 Elf_Internal_Rela
*rel
;
2503 Elf_Internal_Rela
*relend
;
2504 unsigned isec_segment
, got_segment
, plt_segment
,
2506 int silence_segment_error
= !bfd_link_pic (info
);
2508 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
2509 sym_hashes
= elf_sym_hashes (input_bfd
);
2510 relend
= relocs
+ input_section
->reloc_count
;
2512 isec_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2513 input_section
->output_section
);
2514 if (IS_FDPIC (output_bfd
) && bfinfdpic_got_section (info
))
2515 got_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2516 bfinfdpic_got_section (info
)
2520 if (IS_FDPIC (output_bfd
) && elf_hash_table (info
)->dynamic_sections_created
)
2521 plt_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2522 bfinfdpic_plt_section (info
)
2527 for (rel
= relocs
; rel
< relend
; rel
++)
2529 reloc_howto_type
*howto
;
2530 unsigned long r_symndx
;
2531 Elf_Internal_Sym
*sym
;
2533 struct elf_link_hash_entry
*h
;
2535 bfd_reloc_status_type r
;
2536 const char * name
= NULL
;
2539 struct bfinfdpic_relocs_info
*picrel
;
2540 bfd_vma orig_addend
= rel
->r_addend
;
2542 r_type
= ELF32_R_TYPE (rel
->r_info
);
2544 if (r_type
== R_BFIN_GNU_VTINHERIT
2545 || r_type
== R_BFIN_GNU_VTENTRY
)
2548 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2549 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2552 bfd_set_error (bfd_error_bad_value
);
2561 if (r_symndx
< symtab_hdr
->sh_info
)
2563 sym
= local_syms
+ r_symndx
;
2564 osec
= sec
= local_sections
[r_symndx
];
2565 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2567 name
= bfd_elf_string_from_elf_section
2568 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
2569 name
= name
== NULL
? bfd_section_name (sec
) : name
;
2573 bfd_boolean warned
, ignored
;
2574 bfd_boolean unresolved_reloc
;
2576 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2577 r_symndx
, symtab_hdr
, sym_hashes
,
2579 unresolved_reloc
, warned
, ignored
);
2583 if (sec
!= NULL
&& discarded_section (sec
))
2584 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2585 rel
, 1, relend
, howto
, 0, contents
);
2587 if (bfd_link_relocatable (info
))
2591 && (h
->root
.type
== bfd_link_hash_defined
2592 || h
->root
.type
== bfd_link_hash_defweak
)
2593 && !BFINFDPIC_SYM_LOCAL (info
, h
))
2601 case R_BFIN_PCREL24
:
2602 case R_BFIN_PCREL24_JUMP_L
:
2603 case R_BFIN_BYTE4_DATA
:
2604 if (! IS_FDPIC (output_bfd
))
2608 case R_BFIN_GOT17M4
:
2611 case R_BFIN_FUNCDESC_GOT17M4
:
2612 case R_BFIN_FUNCDESC_GOTHI
:
2613 case R_BFIN_FUNCDESC_GOTLO
:
2614 case R_BFIN_GOTOFF17M4
:
2615 case R_BFIN_GOTOFFHI
:
2616 case R_BFIN_GOTOFFLO
:
2617 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2618 case R_BFIN_FUNCDESC_GOTOFFHI
:
2619 case R_BFIN_FUNCDESC_GOTOFFLO
:
2620 case R_BFIN_FUNCDESC
:
2621 case R_BFIN_FUNCDESC_VALUE
:
2622 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2626 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2627 (info
), input_bfd
, h
,
2628 orig_addend
, INSERT
);
2630 /* In order to find the entry we created before, we must
2631 use the original addend, not the one that may have been
2632 modified by _bfd_elf_rela_local_sym(). */
2633 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2634 (info
), input_bfd
, r_symndx
,
2635 orig_addend
, INSERT
);
2639 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel
, output_bfd
, info
,
2644 /* xgettext:c-format */
2645 (_("%pB: relocation at `%pA+%#" PRIx64
"' "
2646 "references symbol `%s' with nonzero addend"),
2647 input_bfd
, input_section
, (uint64_t) rel
->r_offset
, name
);
2657 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2658 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2659 rel
->r_offset
) != (bfd_vma
) -1)
2661 info
->callbacks
->warning
2662 (info
, _("relocation references symbol not defined in the module"),
2663 name
, input_bfd
, input_section
, rel
->r_offset
);
2671 case R_BFIN_PCREL24
:
2672 case R_BFIN_PCREL24_JUMP_L
:
2673 check_segment
[0] = isec_segment
;
2674 if (! IS_FDPIC (output_bfd
))
2675 check_segment
[1] = isec_segment
;
2676 else if (picrel
->plt
)
2678 relocation
= bfinfdpic_plt_section (info
)->output_section
->vma
2679 + bfinfdpic_plt_section (info
)->output_offset
2680 + picrel
->plt_entry
;
2681 check_segment
[1] = plt_segment
;
2683 /* We don't want to warn on calls to undefined weak symbols,
2684 as calls to them must be protected by non-NULL tests
2685 anyway, and unprotected calls would invoke undefined
2687 else if (picrel
->symndx
== -1
2688 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefweak
)
2689 check_segment
[1] = check_segment
[0];
2691 check_segment
[1] = sec
2692 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2696 case R_BFIN_GOT17M4
:
2699 relocation
= picrel
->got_entry
;
2700 check_segment
[0] = check_segment
[1] = got_segment
;
2703 case R_BFIN_FUNCDESC_GOT17M4
:
2704 case R_BFIN_FUNCDESC_GOTHI
:
2705 case R_BFIN_FUNCDESC_GOTLO
:
2706 relocation
= picrel
->fdgot_entry
;
2707 check_segment
[0] = check_segment
[1] = got_segment
;
2710 case R_BFIN_GOTOFFHI
:
2711 case R_BFIN_GOTOFF17M4
:
2712 case R_BFIN_GOTOFFLO
:
2713 relocation
-= bfinfdpic_got_section (info
)->output_section
->vma
2714 + bfinfdpic_got_section (info
)->output_offset
2715 + bfinfdpic_got_initial_offset (info
);
2716 check_segment
[0] = got_segment
;
2717 check_segment
[1] = sec
2718 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2722 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2723 case R_BFIN_FUNCDESC_GOTOFFHI
:
2724 case R_BFIN_FUNCDESC_GOTOFFLO
:
2725 relocation
= picrel
->fd_entry
;
2726 check_segment
[0] = check_segment
[1] = got_segment
;
2729 case R_BFIN_FUNCDESC
:
2732 bfd_vma addend
= rel
->r_addend
;
2734 if (! (h
&& h
->root
.type
== bfd_link_hash_undefweak
2735 && BFINFDPIC_SYM_LOCAL (info
, h
)))
2737 /* If the symbol is dynamic and there may be dynamic
2738 symbol resolution because we are or are linked with a
2739 shared library, emit a FUNCDESC relocation such that
2740 the dynamic linker will allocate the function
2741 descriptor. If the symbol needs a non-local function
2742 descriptor but binds locally (e.g., its visibility is
2743 protected, emit a dynamic relocation decayed to
2745 if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
)
2746 && BFINFDPIC_SYM_LOCAL (info
, h
)
2747 && !bfd_link_pde (info
))
2749 dynindx
= elf_section_data (h
->root
.u
.def
.section
2750 ->output_section
)->dynindx
;
2751 addend
+= h
->root
.u
.def
.section
->output_offset
2752 + h
->root
.u
.def
.value
;
2754 else if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
))
2758 info
->callbacks
->warning
2759 (info
, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2760 name
, input_bfd
, input_section
, rel
->r_offset
);
2763 dynindx
= h
->dynindx
;
2767 /* Otherwise, we know we have a private function
2768 descriptor, so reference it directly. */
2769 BFD_ASSERT (picrel
->privfd
);
2770 r_type
= R_BFIN_BYTE4_DATA
;
2771 dynindx
= elf_section_data (bfinfdpic_got_section (info
)
2772 ->output_section
)->dynindx
;
2773 addend
= bfinfdpic_got_section (info
)->output_offset
2774 + bfinfdpic_got_initial_offset (info
)
2778 /* If there is room for dynamic symbol resolution, emit
2779 the dynamic relocation. However, if we're linking an
2780 executable at a fixed location, we won't have emitted a
2781 dynamic symbol entry for the got section, so idx will
2782 be zero, which means we can and should compute the
2783 address of the private descriptor ourselves. */
2784 if (bfd_link_pde (info
)
2785 && (!h
|| BFINFDPIC_FUNCDESC_LOCAL (info
, h
)))
2789 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2790 if ((bfd_section_flags (input_section
->output_section
)
2791 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2793 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2797 info
->callbacks
->warning
2799 _("cannot emit fixups in read-only section"),
2800 name
, input_bfd
, input_section
, rel
->r_offset
);
2804 offset
= _bfd_elf_section_offset
2806 input_section
, rel
->r_offset
);
2808 if (offset
!= (bfd_vma
)-1)
2809 _bfinfdpic_add_rofixup (output_bfd
,
2810 bfinfdpic_gotfixup_section
2812 offset
+ input_section
2813 ->output_section
->vma
2814 + input_section
->output_offset
,
2818 else if ((bfd_section_flags (input_section
->output_section
)
2819 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2823 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2827 info
->callbacks
->warning
2829 _("cannot emit dynamic relocations in read-only section"),
2830 name
, input_bfd
, input_section
, rel
->r_offset
);
2833 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2834 input_section
, rel
->r_offset
);
2836 if (offset
!= (bfd_vma
)-1)
2837 _bfinfdpic_add_dyn_reloc (output_bfd
,
2838 bfinfdpic_gotrel_section (info
),
2839 offset
+ input_section
2840 ->output_section
->vma
2841 + input_section
->output_offset
,
2843 dynindx
, addend
, picrel
);
2846 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2849 /* We want the addend in-place because dynamic
2850 relocations are REL. Setting relocation to it should
2851 arrange for it to be installed. */
2852 relocation
= addend
- rel
->r_addend
;
2854 check_segment
[0] = check_segment
[1] = got_segment
;
2857 case R_BFIN_BYTE4_DATA
:
2858 if (! IS_FDPIC (output_bfd
))
2860 check_segment
[0] = check_segment
[1] = -1;
2864 case R_BFIN_FUNCDESC_VALUE
:
2867 bfd_vma addend
= rel
->r_addend
;
2869 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2870 input_section
, rel
->r_offset
);
2872 /* If the symbol is dynamic but binds locally, use
2874 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2876 if (addend
&& r_type
== R_BFIN_FUNCDESC_VALUE
)
2878 info
->callbacks
->warning
2879 (info
, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2880 name
, input_bfd
, input_section
, rel
->r_offset
);
2883 dynindx
= h
->dynindx
;
2888 addend
+= h
->root
.u
.def
.value
;
2890 addend
+= sym
->st_value
;
2892 addend
+= osec
->output_offset
;
2893 if (osec
&& osec
->output_section
2894 && ! bfd_is_abs_section (osec
->output_section
)
2895 && ! bfd_is_und_section (osec
->output_section
))
2896 dynindx
= elf_section_data (osec
->output_section
)->dynindx
;
2901 /* If we're linking an executable at a fixed address, we
2902 can omit the dynamic relocation as long as the symbol
2903 is defined in the current link unit (which is implied
2904 by its output section not being NULL). */
2905 if (bfd_link_pde (info
)
2906 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2909 addend
+= osec
->output_section
->vma
;
2910 if (IS_FDPIC (input_bfd
)
2911 && (bfd_section_flags (input_section
->output_section
)
2912 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2914 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2918 info
->callbacks
->warning
2920 _("cannot emit fixups in read-only section"),
2921 name
, input_bfd
, input_section
, rel
->r_offset
);
2924 if (!h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2926 if (offset
!= (bfd_vma
)-1)
2928 _bfinfdpic_add_rofixup (output_bfd
,
2929 bfinfdpic_gotfixup_section
2931 offset
+ input_section
2932 ->output_section
->vma
2933 + input_section
->output_offset
,
2936 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2937 _bfinfdpic_add_rofixup
2939 bfinfdpic_gotfixup_section (info
),
2940 offset
+ input_section
->output_section
->vma
2941 + input_section
->output_offset
+ 4, picrel
);
2948 if ((bfd_section_flags (input_section
->output_section
)
2949 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2951 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2955 info
->callbacks
->warning
2957 _("cannot emit dynamic relocations in read-only section"),
2958 name
, input_bfd
, input_section
, rel
->r_offset
);
2962 if (offset
!= (bfd_vma
)-1)
2963 _bfinfdpic_add_dyn_reloc (output_bfd
,
2964 bfinfdpic_gotrel_section (info
),
2966 + input_section
->output_section
->vma
2967 + input_section
->output_offset
,
2968 r_type
, dynindx
, addend
, picrel
);
2971 addend
+= osec
->output_section
->vma
;
2972 /* We want the addend in-place because dynamic
2973 relocations are REL. Setting relocation to it
2974 should arrange for it to be installed. */
2975 relocation
= addend
- rel
->r_addend
;
2978 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2980 /* If we've omitted the dynamic relocation, just emit
2981 the fixed addresses of the symbol and of the local
2983 if (bfd_link_pde (info
)
2984 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2985 bfd_put_32 (output_bfd
,
2986 bfinfdpic_got_section (info
)->output_section
->vma
2987 + bfinfdpic_got_section (info
)->output_offset
2988 + bfinfdpic_got_initial_offset (info
),
2989 contents
+ rel
->r_offset
+ 4);
2991 /* A function descriptor used for lazy or local
2992 resolving is initialized such that its high word
2993 contains the output section index in which the
2994 PLT entries are located, and the low word
2995 contains the offset of the lazy PLT entry entry
2996 point into that section. */
2997 bfd_put_32 (output_bfd
,
2998 h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
3000 : _bfinfdpic_osec_to_segment (output_bfd
,
3003 contents
+ rel
->r_offset
+ 4);
3006 check_segment
[0] = check_segment
[1] = got_segment
;
3010 check_segment
[0] = isec_segment
;
3011 check_segment
[1] = sec
3012 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
3017 if (check_segment
[0] != check_segment
[1] && IS_FDPIC (output_bfd
))
3019 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3020 in the ld testsuite. */
3021 /* This helps catch problems in GCC while we can't do more
3022 than static linking. The idea is to test whether the
3023 input file basename is crt0.o only once. */
3024 if (silence_segment_error
== 1)
3025 silence_segment_error
=
3026 (strlen (bfd_get_filename (input_bfd
)) == 6
3027 && filename_cmp (bfd_get_filename (input_bfd
), "crt0.o") == 0)
3028 || (strlen (bfd_get_filename (input_bfd
)) > 6
3029 && filename_cmp (bfd_get_filename (input_bfd
)
3030 + strlen (bfd_get_filename (input_bfd
)) - 7,
3034 if (!silence_segment_error
3035 /* We don't want duplicate errors for undefined
3037 && !(picrel
&& picrel
->symndx
== -1
3038 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefined
))
3039 info
->callbacks
->warning
3042 ? _("relocations between different segments are not supported")
3043 : _("warning: relocation references a different segment"),
3044 name
, input_bfd
, input_section
, rel
->r_offset
);
3045 if (!silence_segment_error
&& bfd_link_pic (info
))
3047 elf_elfheader (output_bfd
)->e_flags
|= EF_BFIN_PIC
;
3052 case R_BFIN_GOTOFFHI
:
3053 /* We need the addend to be applied before we shift the
3055 relocation
+= rel
->r_addend
;
3058 case R_BFIN_FUNCDESC_GOTHI
:
3059 case R_BFIN_FUNCDESC_GOTOFFHI
:
3064 case R_BFIN_FUNCDESC_GOTLO
:
3065 case R_BFIN_GOTOFFLO
:
3066 case R_BFIN_FUNCDESC_GOTOFFLO
:
3067 relocation
&= 0xffff;
3076 case R_BFIN_PCREL24
:
3077 case R_BFIN_PCREL24_JUMP_L
:
3078 if (! IS_FDPIC (output_bfd
) || ! picrel
->plt
)
3082 /* When referencing a GOT entry, a function descriptor or a
3083 PLT, we don't want the addend to apply to the reference,
3084 but rather to the referenced symbol. The actual entry
3085 will have already been created taking the addend into
3086 account, so cancel it out here. */
3087 case R_BFIN_GOT17M4
:
3090 case R_BFIN_FUNCDESC_GOT17M4
:
3091 case R_BFIN_FUNCDESC_GOTHI
:
3092 case R_BFIN_FUNCDESC_GOTLO
:
3093 case R_BFIN_FUNCDESC_GOTOFF17M4
:
3094 case R_BFIN_FUNCDESC_GOTOFFHI
:
3095 case R_BFIN_FUNCDESC_GOTOFFLO
:
3096 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3097 here, since we do want to apply the addend to the others.
3098 Note that we've applied the addend to GOTOFFHI before we
3099 shifted it right. */
3100 case R_BFIN_GOTOFFHI
:
3101 relocation
-= rel
->r_addend
;
3108 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
3109 contents
, rel
->r_offset
,
3110 relocation
, rel
->r_addend
);
3112 if (r
!= bfd_reloc_ok
)
3114 const char * msg
= (const char *) NULL
;
3118 case bfd_reloc_overflow
:
3119 (*info
->callbacks
->reloc_overflow
)
3120 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3121 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3124 case bfd_reloc_undefined
:
3125 (*info
->callbacks
->undefined_symbol
)
3126 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
3129 case bfd_reloc_outofrange
:
3130 msg
= _("internal error: out of range error");
3133 case bfd_reloc_notsupported
:
3134 msg
= _("internal error: unsupported relocation error");
3137 case bfd_reloc_dangerous
:
3138 msg
= _("internal error: dangerous relocation");
3142 msg
= _("internal error: unknown error");
3147 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
3148 input_section
, rel
->r_offset
);
3155 /* We need dynamic symbols for every section, since segments can
3156 relocate independently. */
3158 _bfinfdpic_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3159 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3162 switch (elf_section_data (p
)->this_hdr
.sh_type
)
3166 /* If sh_type is yet undecided, assume it could be
3167 SHT_PROGBITS/SHT_NOBITS. */
3171 /* There shouldn't be section relative relocations
3172 against any other section. */
3178 /* Create a .got section, as well as its additional info field. This
3179 is almost entirely copied from
3180 elflink.c:_bfd_elf_create_got_section(). */
3183 _bfin_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
3185 flagword flags
, pltflags
;
3187 struct elf_link_hash_entry
*h
;
3188 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3191 /* This function may be called more than once. */
3192 s
= elf_hash_table (info
)->sgot
;
3196 /* Machine specific: although pointers are 32-bits wide, we want the
3197 GOT to be aligned to a 64-bit boundary, such that function
3198 descriptors in it can be accessed with 64-bit loads and
3202 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3203 | SEC_LINKER_CREATED
);
3206 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
3207 elf_hash_table (info
)->sgot
= s
;
3209 || !bfd_set_section_alignment (s
, ptralign
))
3212 if (bed
->want_got_sym
)
3214 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3215 (or .got.plt) section. We don't do this in the linker script
3216 because we don't want to define the symbol if we are not creating
3217 a global offset table. */
3218 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "__GLOBAL_OFFSET_TABLE_");
3219 elf_hash_table (info
)->hgot
= h
;
3223 /* Machine-specific: we want the symbol for executables as
3225 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3229 /* The first bit of the global offset table is the header. */
3230 s
->size
+= bed
->got_header_size
;
3232 /* This is the machine-specific part. Create and initialize section
3233 data for the got. */
3234 if (IS_FDPIC (abfd
))
3236 bfinfdpic_relocs_info (info
) = htab_try_create (1,
3237 bfinfdpic_relocs_info_hash
,
3238 bfinfdpic_relocs_info_eq
,
3240 if (! bfinfdpic_relocs_info (info
))
3243 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.got",
3244 (flags
| SEC_READONLY
));
3246 || !bfd_set_section_alignment (s
, 2))
3249 bfinfdpic_gotrel_section (info
) = s
;
3251 /* Machine-specific. */
3252 s
= bfd_make_section_anyway_with_flags (abfd
, ".rofixup",
3253 (flags
| SEC_READONLY
));
3255 || !bfd_set_section_alignment (s
, 2))
3258 bfinfdpic_gotfixup_section (info
) = s
;
3261 pltflags
|= SEC_CODE
;
3262 if (bed
->plt_not_loaded
)
3263 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
3264 if (bed
->plt_readonly
)
3265 pltflags
|= SEC_READONLY
;
3267 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
3269 || !bfd_set_section_alignment (s
, bed
->plt_alignment
))
3271 /* Blackfin-specific: remember it. */
3272 bfinfdpic_plt_section (info
) = s
;
3274 if (bed
->want_plt_sym
)
3276 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3278 struct bfd_link_hash_entry
*bh
= NULL
;
3280 if (! (_bfd_generic_link_add_one_symbol
3281 (info
, abfd
, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
, 0, NULL
,
3282 FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
3284 h
= (struct elf_link_hash_entry
*) bh
;
3286 h
->type
= STT_OBJECT
;
3288 if (! bfd_link_executable (info
)
3289 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3293 /* Blackfin-specific: we want rel relocations for the plt. */
3294 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.plt",
3295 flags
| SEC_READONLY
);
3297 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
3299 /* Blackfin-specific: remember it. */
3300 bfinfdpic_pltrel_section (info
) = s
;
3305 /* Make sure the got and plt sections exist, and that our pointers in
3306 the link hash table point to them. */
3309 elf32_bfinfdpic_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3311 /* This is mostly copied from
3312 elflink.c:_bfd_elf_create_dynamic_sections(). */
3315 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3317 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3318 | SEC_LINKER_CREATED
);
3320 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3321 .rel[a].bss sections. */
3323 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3324 if (! _bfin_create_got_section (abfd
, info
))
3327 /* Blackfin-specific: make sure we created everything we wanted. */
3328 BFD_ASSERT (bfinfdpic_got_section (info
) && bfinfdpic_gotrel_section (info
)
3329 /* && bfinfdpic_gotfixup_section (info) */
3330 && bfinfdpic_plt_section (info
)
3331 && bfinfdpic_pltrel_section (info
));
3333 if (bed
->want_dynbss
)
3335 /* The .dynbss section is a place to put symbols which are defined
3336 by dynamic objects, are referenced by regular objects, and are
3337 not functions. We must allocate space for them in the process
3338 image and use a R_*_COPY reloc to tell the dynamic linker to
3339 initialize them at run time. The linker script puts the .dynbss
3340 section into the .bss section of the final image. */
3341 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
3342 SEC_ALLOC
| SEC_LINKER_CREATED
);
3346 /* The .rel[a].bss section holds copy relocs. This section is not
3347 normally needed. We need to create it here, though, so that the
3348 linker will map it to an output section. We can't just create it
3349 only if we need it, because we will not know whether we need it
3350 until we have seen all the input files, and the first time the
3351 main linker code calls BFD after examining all the input files
3352 (size_dynamic_sections) the input sections have already been
3353 mapped to the output sections. If the section turns out not to
3354 be needed, we can discard it later. We will never need this
3355 section when generating a shared object, since they do not use
3357 if (! bfd_link_pic (info
))
3359 s
= bfd_make_section_anyway_with_flags (abfd
,
3361 flags
| SEC_READONLY
);
3363 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
3371 /* Compute the total GOT size required by each symbol in each range.
3372 Symbols may require up to 4 words in the GOT: an entry pointing to
3373 the symbol, an entry pointing to its function descriptor, and a
3374 private function descriptors taking two words. */
3377 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info
*entry
,
3378 struct _bfinfdpic_dynamic_got_info
*dinfo
)
3380 /* Allocate space for a GOT entry pointing to the symbol. */
3382 dinfo
->got17m4
+= 4;
3383 else if (entry
->gothilo
)
3384 dinfo
->gothilo
+= 4;
3389 /* Allocate space for a GOT entry pointing to the function
3391 if (entry
->fdgot17m4
)
3392 dinfo
->got17m4
+= 4;
3393 else if (entry
->fdgothilo
)
3394 dinfo
->gothilo
+= 4;
3399 /* Decide whether we need a PLT entry, a function descriptor in the
3400 GOT, and a lazy PLT entry for this symbol. */
3401 entry
->plt
= entry
->call
3402 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3403 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3404 entry
->privfd
= entry
->plt
3405 || entry
->fdgoff17m4
|| entry
->fdgoffhilo
3406 || ((entry
->fd
|| entry
->fdgot17m4
|| entry
->fdgothilo
)
3407 && (entry
->symndx
!= -1
3408 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
)));
3409 entry
->lazyplt
= entry
->privfd
3410 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3411 && ! (dinfo
->info
->flags
& DF_BIND_NOW
)
3412 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3414 /* Allocate space for a function descriptor. */
3415 if (entry
->fdgoff17m4
)
3417 else if (entry
->privfd
&& entry
->plt
)
3419 else if (entry
->privfd
)
3426 dinfo
->lzplt
+= LZPLT_NORMAL_SIZE
;
3429 /* Compute the number of dynamic relocations and fixups that a symbol
3430 requires, and add (or subtract) from the grand and per-symbol
3434 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info
*entry
,
3435 struct _bfinfdpic_dynamic_got_info
*dinfo
,
3436 bfd_boolean subtract
)
3438 bfd_vma relocs
= 0, fixups
= 0;
3440 if (!bfd_link_pde (dinfo
->info
))
3441 relocs
= entry
->relocs32
+ entry
->relocsfd
+ entry
->relocsfdv
;
3444 if (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
))
3446 if (entry
->symndx
!= -1
3447 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3448 fixups
+= entry
->relocs32
+ 2 * entry
->relocsfdv
;
3451 relocs
+= entry
->relocs32
+ entry
->relocsfdv
;
3453 if (entry
->symndx
!= -1
3454 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
))
3456 if (entry
->symndx
!= -1
3457 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3458 fixups
+= entry
->relocsfd
;
3461 relocs
+= entry
->relocsfd
;
3470 entry
->dynrelocs
+= relocs
;
3471 entry
->fixups
+= fixups
;
3472 dinfo
->relocs
+= relocs
;
3473 dinfo
->fixups
+= fixups
;
3476 /* Compute the total GOT and PLT size required by each symbol in each range. *
3477 Symbols may require up to 4 words in the GOT: an entry pointing to
3478 the symbol, an entry pointing to its function descriptor, and a
3479 private function descriptors taking two words. */
3482 _bfinfdpic_count_got_plt_entries (void **entryp
, void *dinfo_
)
3484 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3485 struct _bfinfdpic_dynamic_got_info
*dinfo
= dinfo_
;
3487 _bfinfdpic_count_nontls_entries (entry
, dinfo
);
3489 _bfinfdpic_count_relocs_fixups (entry
, dinfo
, FALSE
);
3494 /* This structure is used to assign offsets to got entries, function
3495 descriptors, plt entries and lazy plt entries. */
3497 struct _bfinfdpic_dynamic_got_plt_info
3499 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3500 struct _bfinfdpic_dynamic_got_info g
;
3502 /* For each addressable range, we record a MAX (positive) and MIN
3503 (negative) value. CUR is used to assign got entries, and it's
3504 incremented from an initial positive value to MAX, then from MIN
3505 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3506 assign function descriptors, and it's decreased from an initial
3507 non-positive value to MIN, then from MAX down to CUR (unless CUR
3508 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3509 to even words. ODD, if non-zero, indicates an odd word to be
3510 used for the next got entry, otherwise CUR is used and
3511 incremented by a pair of words, wrapping around when it reaches
3512 MAX. FDCUR is decremented (and wrapped) before the next function
3513 descriptor is chosen. FDPLT indicates the number of remaining
3514 slots that can be used for function descriptors used only by PLT
3516 struct _bfinfdpic_dynamic_got_alloc_data
3518 bfd_signed_vma max
, cur
, odd
, fdcur
, min
;
3523 /* Determine the positive and negative ranges to be used by each
3524 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3525 double-word boundary, are the minimum (negative) and maximum
3526 (positive) GOT offsets already used by previous ranges, except for
3527 an ODD entry that may have been left behind. GOT and FD indicate
3528 the size of GOT entries and function descriptors that must be
3529 placed within the range from -WRAP to WRAP. If there's room left,
3530 up to FDPLT bytes should be reserved for additional function
3533 inline static bfd_signed_vma
3534 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data
*gad
,
3535 bfd_signed_vma fdcur
,
3543 bfd_signed_vma wrapmin
= -wrap
;
3545 /* Start at the given initial points. */
3549 /* If we had an incoming odd word and we have any got entries that
3550 are going to use it, consume it, otherwise leave gad->odd at
3551 zero. We might force gad->odd to zero and return the incoming
3552 odd such that it is used by the next range, but then GOT entries
3553 might appear to be out of order and we wouldn't be able to
3554 shorten the GOT by one word if it turns out to end with an
3555 unpaired GOT entry. */
3565 /* If we're left with an unpaired GOT entry, compute its location
3566 such that we can return it. Otherwise, if got doesn't require an
3567 odd number of words here, either odd was already zero in the
3568 block above, or it was set to zero because got was non-zero, or
3569 got was already zero. In the latter case, we want the value of
3570 odd to carry over to the return statement, so we don't want to
3571 reset odd unless the condition below is true. */
3578 /* Compute the tentative boundaries of this range. */
3579 gad
->max
= cur
+ got
;
3580 gad
->min
= fdcur
- fd
;
3583 /* If function descriptors took too much space, wrap some of them
3585 if (gad
->min
< wrapmin
)
3587 gad
->max
+= wrapmin
- gad
->min
;
3590 /* If there is space left and we have function descriptors
3591 referenced in PLT entries that could take advantage of shorter
3592 offsets, place them here. */
3593 else if (fdplt
&& gad
->min
> wrapmin
)
3596 if ((bfd_vma
) (gad
->min
- wrapmin
) < fdplt
)
3597 fds
= gad
->min
- wrapmin
;
3606 /* If GOT entries took too much space, wrap some of them around.
3607 This may well cause gad->min to become lower than wrapmin. This
3608 will cause a relocation overflow later on, so we don't have to
3610 if ((bfd_vma
) gad
->max
> wrap
)
3612 gad
->min
-= gad
->max
- wrap
;
3615 /* If there is more space left, try to place some more function
3616 descriptors for PLT entries. */
3617 else if (fdplt
&& (bfd_vma
) gad
->max
< wrap
)
3620 if ((bfd_vma
) (wrap
- gad
->max
) < fdplt
)
3621 fds
= wrap
- gad
->max
;
3630 /* If odd was initially computed as an offset past the wrap point,
3633 odd
= gad
->min
+ odd
- gad
->max
;
3635 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3636 before returning, so do it here too. This guarantees that,
3637 should cur and fdcur meet at the wrap point, they'll both be
3639 if (gad
->cur
== gad
->max
)
3640 gad
->cur
= gad
->min
;
3645 /* Compute the location of the next GOT entry, given the allocation
3646 data for a range. */
3648 inline static bfd_signed_vma
3649 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3655 /* If there was an odd word left behind, use it. */
3661 /* Otherwise, use the word pointed to by cur, reserve the next
3662 as an odd word, and skip to the next pair of words, possibly
3665 gad
->odd
= gad
->cur
+ 4;
3667 if (gad
->cur
== gad
->max
)
3668 gad
->cur
= gad
->min
;
3674 /* Compute the location of the next function descriptor entry in the
3675 GOT, given the allocation data for a range. */
3677 inline static bfd_signed_vma
3678 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3680 /* If we're at the bottom, wrap around, and only then allocate the
3681 next pair of words. */
3682 if (gad
->fdcur
== gad
->min
)
3683 gad
->fdcur
= gad
->max
;
3684 return gad
->fdcur
-= 8;
3687 /* Assign GOT offsets for every GOT entry and function descriptor.
3688 Doing everything in a single pass is tricky. */
3691 _bfinfdpic_assign_got_entries (void **entryp
, void *info_
)
3693 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3694 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3697 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3698 else if (entry
->gothilo
)
3699 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3701 if (entry
->fdgot17m4
)
3702 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3703 else if (entry
->fdgothilo
)
3704 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3706 if (entry
->fdgoff17m4
)
3707 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3708 else if (entry
->plt
&& dinfo
->got17m4
.fdplt
)
3710 dinfo
->got17m4
.fdplt
-= 8;
3711 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3713 else if (entry
->plt
)
3715 dinfo
->gothilo
.fdplt
-= 8;
3716 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3718 else if (entry
->privfd
)
3719 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3724 /* Assign GOT offsets to private function descriptors used by PLT
3725 entries (or referenced by 32-bit offsets), as well as PLT entries
3726 and lazy PLT entries. */
3729 _bfinfdpic_assign_plt_entries (void **entryp
, void *info_
)
3731 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3732 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3734 /* If this symbol requires a local function descriptor, allocate
3736 if (entry
->privfd
&& entry
->fd_entry
== 0)
3738 if (dinfo
->got17m4
.fdplt
)
3740 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3741 dinfo
->got17m4
.fdplt
-= 8;
3745 BFD_ASSERT (dinfo
->gothilo
.fdplt
);
3746 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3747 dinfo
->gothilo
.fdplt
-= 8;
3755 /* We use the section's raw size to mark the location of the
3757 entry
->plt_entry
= bfinfdpic_plt_section (dinfo
->g
.info
)->size
;
3759 /* Figure out the length of this PLT entry based on the
3760 addressing mode we need to reach the function descriptor. */
3761 BFD_ASSERT (entry
->fd_entry
);
3762 if (entry
->fd_entry
>= -(1 << (18 - 1))
3763 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
3768 bfinfdpic_plt_section (dinfo
->g
.info
)->size
+= size
;
3773 entry
->lzplt_entry
= dinfo
->g
.lzplt
;
3774 dinfo
->g
.lzplt
+= LZPLT_NORMAL_SIZE
;
3775 /* If this entry is the one that gets the resolver stub, account
3776 for the additional instruction. */
3777 if (entry
->lzplt_entry
% BFINFDPIC_LZPLT_BLOCK_SIZE
3778 == BFINFDPIC_LZPLT_RESOLV_LOC
)
3779 dinfo
->g
.lzplt
+= LZPLT_RESOLVER_EXTRA
;
3785 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3786 _bfinfdpic_assign_plt_entries. */
3789 _bfinfdpic_reset_got_plt_entries (void **entryp
, void *ignore ATTRIBUTE_UNUSED
)
3791 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3793 entry
->got_entry
= 0;
3794 entry
->fdgot_entry
= 0;
3795 entry
->fd_entry
= 0;
3796 entry
->plt_entry
= (bfd_vma
)-1;
3797 entry
->lzplt_entry
= (bfd_vma
)-1;
3802 /* Follow indirect and warning hash entries so that each got entry
3803 points to the final symbol definition. P must point to a pointer
3804 to the hash table we're traversing. Since this traversal may
3805 modify the hash table, we set this pointer to NULL to indicate
3806 we've made a potentially-destructive change to the hash table, so
3807 the traversal must be restarted. */
3809 _bfinfdpic_resolve_final_relocs_info (void **entryp
, void *p
)
3811 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3814 if (entry
->symndx
== -1)
3816 struct elf_link_hash_entry
*h
= entry
->d
.h
;
3817 struct bfinfdpic_relocs_info
*oentry
;
3819 while (h
->root
.type
== bfd_link_hash_indirect
3820 || h
->root
.type
== bfd_link_hash_warning
)
3821 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
3823 if (entry
->d
.h
== h
)
3826 oentry
= bfinfdpic_relocs_info_for_global (*htab
, 0, h
, entry
->addend
,
3831 /* Merge the two entries. */
3832 bfinfdpic_pic_merge_early_relocs_info (oentry
, entry
);
3833 htab_clear_slot (*htab
, entryp
);
3839 /* If we can't find this entry with the new bfd hash, re-insert
3840 it, and get the traversal restarted. */
3841 if (! htab_find (*htab
, entry
))
3843 htab_clear_slot (*htab
, entryp
);
3844 entryp
= htab_find_slot (*htab
, entry
, INSERT
);
3847 /* Abort the traversal, since the whole table may have
3848 moved, and leave it up to the parent to restart the
3850 *(htab_t
*)p
= NULL
;
3858 /* Compute the total size of the GOT, the PLT, the dynamic relocations
3859 section and the rofixup section. Assign locations for GOT and PLT
3863 _bfinfdpic_size_got_plt (bfd
*output_bfd
,
3864 struct _bfinfdpic_dynamic_got_plt_info
*gpinfop
)
3868 struct bfd_link_info
*info
= gpinfop
->g
.info
;
3869 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
3871 memcpy (bfinfdpic_dynamic_got_plt_info (info
), &gpinfop
->g
,
3872 sizeof (gpinfop
->g
));
3875 /* Compute the total size taken by entries in the 18-bit range,
3876 to tell how many PLT function descriptors we can bring into it
3877 without causing it to overflow. */
3878 limit
= odd
+ gpinfop
->g
.got17m4
+ gpinfop
->g
.fd17m4
;
3879 if (limit
< (bfd_vma
)1 << 18)
3880 limit
= ((bfd_vma
)1 << 18) - limit
;
3883 if (gpinfop
->g
.fdplt
< limit
)
3884 limit
= gpinfop
->g
.fdplt
;
3886 /* Determine the ranges of GOT offsets that we can use for each
3887 range of addressing modes. */
3888 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->got17m4
,
3895 (bfd_vma
)1 << (18-1));
3896 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->gothilo
,
3897 gpinfop
->got17m4
.min
,
3899 gpinfop
->got17m4
.max
,
3902 gpinfop
->g
.fdplt
- gpinfop
->got17m4
.fdplt
,
3903 (bfd_vma
)1 << (32-1));
3905 /* Now assign (most) GOT offsets. */
3906 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_got_entries
,
3909 bfinfdpic_got_section (info
)->size
= gpinfop
->gothilo
.max
3910 - gpinfop
->gothilo
.min
3911 /* If an odd word is the last word of the GOT, we don't need this
3912 word to be part of the GOT. */
3913 - (odd
+ 4 == gpinfop
->gothilo
.max
? 4 : 0);
3914 if (bfinfdpic_got_section (info
)->size
== 0)
3915 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3916 else if (bfinfdpic_got_section (info
)->size
== 12
3917 && ! elf_hash_table (info
)->dynamic_sections_created
)
3919 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3920 bfinfdpic_got_section (info
)->size
= 0;
3924 bfinfdpic_got_section (info
)->contents
=
3925 (bfd_byte
*) bfd_zalloc (dynobj
,
3926 bfinfdpic_got_section (info
)->size
);
3927 if (bfinfdpic_got_section (info
)->contents
== NULL
)
3931 if (elf_hash_table (info
)->dynamic_sections_created
)
3932 /* Subtract the number of lzplt entries, since those will generate
3933 relocations in the pltrel section. */
3934 bfinfdpic_gotrel_section (info
)->size
=
3935 (gpinfop
->g
.relocs
- gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
)
3936 * get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3938 BFD_ASSERT (gpinfop
->g
.relocs
== 0);
3939 if (bfinfdpic_gotrel_section (info
)->size
== 0)
3940 bfinfdpic_gotrel_section (info
)->flags
|= SEC_EXCLUDE
;
3943 bfinfdpic_gotrel_section (info
)->contents
=
3944 (bfd_byte
*) bfd_zalloc (dynobj
,
3945 bfinfdpic_gotrel_section (info
)->size
);
3946 if (bfinfdpic_gotrel_section (info
)->contents
== NULL
)
3950 bfinfdpic_gotfixup_section (info
)->size
= (gpinfop
->g
.fixups
+ 1) * 4;
3951 if (bfinfdpic_gotfixup_section (info
)->size
== 0)
3952 bfinfdpic_gotfixup_section (info
)->flags
|= SEC_EXCLUDE
;
3955 bfinfdpic_gotfixup_section (info
)->contents
=
3956 (bfd_byte
*) bfd_zalloc (dynobj
,
3957 bfinfdpic_gotfixup_section (info
)->size
);
3958 if (bfinfdpic_gotfixup_section (info
)->contents
== NULL
)
3962 if (elf_hash_table (info
)->dynamic_sections_created
)
3963 bfinfdpic_pltrel_section (info
)->size
=
3964 gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
* get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3965 if (bfinfdpic_pltrel_section (info
)->size
== 0)
3966 bfinfdpic_pltrel_section (info
)->flags
|= SEC_EXCLUDE
;
3969 bfinfdpic_pltrel_section (info
)->contents
=
3970 (bfd_byte
*) bfd_zalloc (dynobj
,
3971 bfinfdpic_pltrel_section (info
)->size
);
3972 if (bfinfdpic_pltrel_section (info
)->contents
== NULL
)
3976 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
3977 such that there's room for the additional instruction needed to
3978 call the resolver. Since _bfinfdpic_assign_got_entries didn't
3979 account for them, our block size is 4 bytes smaller than the real
3981 if (elf_hash_table (info
)->dynamic_sections_created
)
3983 bfinfdpic_plt_section (info
)->size
= gpinfop
->g
.lzplt
3984 + ((gpinfop
->g
.lzplt
+ (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) - LZPLT_NORMAL_SIZE
)
3985 / (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) * LZPLT_RESOLVER_EXTRA
);
3988 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
3989 actually assign lazy PLT entries addresses. */
3990 gpinfop
->g
.lzplt
= 0;
3992 /* Save information that we're going to need to generate GOT and PLT
3994 bfinfdpic_got_initial_offset (info
) = -gpinfop
->gothilo
.min
;
3996 if (get_elf_backend_data (output_bfd
)->want_got_sym
)
3997 elf_hash_table (info
)->hgot
->root
.u
.def
.value
3998 = bfinfdpic_got_initial_offset (info
);
4000 if (elf_hash_table (info
)->dynamic_sections_created
)
4001 bfinfdpic_plt_initial_offset (info
) =
4002 bfinfdpic_plt_section (info
)->size
;
4004 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_plt_entries
,
4007 /* Allocate the PLT section contents only after
4008 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4009 non-lazy PLT entries. */
4010 if (bfinfdpic_plt_section (info
)->size
== 0)
4011 bfinfdpic_plt_section (info
)->flags
|= SEC_EXCLUDE
;
4014 bfinfdpic_plt_section (info
)->contents
=
4015 (bfd_byte
*) bfd_zalloc (dynobj
,
4016 bfinfdpic_plt_section (info
)->size
);
4017 if (bfinfdpic_plt_section (info
)->contents
== NULL
)
4024 /* Set the sizes of the dynamic sections. */
4027 elf32_bfinfdpic_size_dynamic_sections (bfd
*output_bfd
,
4028 struct bfd_link_info
*info
)
4030 struct elf_link_hash_table
*htab
;
4033 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4035 htab
= elf_hash_table (info
);
4036 dynobj
= htab
->dynobj
;
4037 BFD_ASSERT (dynobj
!= NULL
);
4039 if (htab
->dynamic_sections_created
)
4041 /* Set the contents of the .interp section to the interpreter. */
4042 if (bfd_link_executable (info
) && !info
->nointerp
)
4044 s
= bfd_get_linker_section (dynobj
, ".interp");
4045 BFD_ASSERT (s
!= NULL
);
4046 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
4047 s
->contents
= (bfd_byte
*) ELF_DYNAMIC_INTERPRETER
;
4051 memset (&gpinfo
, 0, sizeof (gpinfo
));
4052 gpinfo
.g
.info
= info
;
4056 htab_t relocs
= bfinfdpic_relocs_info (info
);
4058 htab_traverse (relocs
, _bfinfdpic_resolve_final_relocs_info
, &relocs
);
4060 if (relocs
== bfinfdpic_relocs_info (info
))
4064 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_count_got_plt_entries
,
4067 /* Allocate space to save the summary information, we're going to
4068 use it if we're doing relaxations. */
4069 bfinfdpic_dynamic_got_plt_info (info
) = bfd_alloc (dynobj
, sizeof (gpinfo
.g
));
4071 if (!_bfinfdpic_size_got_plt (output_bfd
, &gpinfo
))
4074 s
= bfd_get_linker_section (dynobj
, ".dynbss");
4075 if (s
&& s
->size
== 0)
4076 s
->flags
|= SEC_EXCLUDE
;
4078 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
4079 if (s
&& s
->size
== 0)
4080 s
->flags
|= SEC_EXCLUDE
;
4082 return _bfd_elf_add_dynamic_tags (output_bfd
, info
, TRUE
);
4086 elf32_bfinfdpic_always_size_sections (bfd
*output_bfd
,
4087 struct bfd_link_info
*info
)
4089 if (!bfd_link_relocatable (info
)
4090 && !bfd_elf_stack_segment_size (output_bfd
, info
,
4091 "__stacksize", DEFAULT_STACK_SIZE
))
4097 /* Check whether any of the relocations was optimized away, and
4098 subtract it from the relocation or fixup count. */
4100 _bfinfdpic_check_discarded_relocs (bfd
*abfd
, asection
*sec
,
4101 struct bfd_link_info
*info
,
4102 bfd_boolean
*changed
)
4104 Elf_Internal_Shdr
*symtab_hdr
;
4105 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
4106 Elf_Internal_Rela
*rel
, *erel
;
4108 if ((sec
->flags
& SEC_RELOC
) == 0
4109 || sec
->reloc_count
== 0)
4112 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4113 sym_hashes
= elf_sym_hashes (abfd
);
4114 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
4115 if (!elf_bad_symtab (abfd
))
4116 sym_hashes_end
-= symtab_hdr
->sh_info
;
4118 rel
= elf_section_data (sec
)->relocs
;
4120 /* Now examine each relocation. */
4121 for (erel
= rel
+ sec
->reloc_count
; rel
< erel
; rel
++)
4123 struct elf_link_hash_entry
*h
;
4124 unsigned long r_symndx
;
4125 struct bfinfdpic_relocs_info
*picrel
;
4126 struct _bfinfdpic_dynamic_got_info
*dinfo
;
4128 if (ELF32_R_TYPE (rel
->r_info
) != R_BFIN_BYTE4_DATA
4129 && ELF32_R_TYPE (rel
->r_info
) != R_BFIN_FUNCDESC
)
4132 if (_bfd_elf_section_offset (sec
->output_section
->owner
,
4133 info
, sec
, rel
->r_offset
)
4137 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4138 if (r_symndx
< symtab_hdr
->sh_info
)
4142 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4143 while (h
->root
.type
== bfd_link_hash_indirect
4144 || h
->root
.type
== bfd_link_hash_warning
)
4145 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
4149 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4151 rel
->r_addend
, NO_INSERT
);
4153 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info
),
4155 rel
->r_addend
, NO_INSERT
);
4161 dinfo
= bfinfdpic_dynamic_got_plt_info (info
);
4163 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, TRUE
);
4164 if (ELF32_R_TYPE (rel
->r_info
) == R_BFIN_BYTE4_DATA
)
4166 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4168 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, FALSE
);
4175 bfinfdpic_elf_discard_info (bfd
*ibfd
,
4176 struct elf_reloc_cookie
*cookie ATTRIBUTE_UNUSED
,
4177 struct bfd_link_info
*info
)
4179 bfd_boolean changed
= FALSE
;
4183 /* Account for relaxation of .eh_frame section. */
4184 for (s
= ibfd
->sections
; s
; s
= s
->next
)
4185 if (s
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4187 if (!_bfinfdpic_check_discarded_relocs (ibfd
, s
, info
, &changed
))
4189 obfd
= s
->output_section
->owner
;
4194 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4196 memset (&gpinfo
, 0, sizeof (gpinfo
));
4197 memcpy (&gpinfo
.g
, bfinfdpic_dynamic_got_plt_info (info
),
4200 /* Clear GOT and PLT assignments. */
4201 htab_traverse (bfinfdpic_relocs_info (info
),
4202 _bfinfdpic_reset_got_plt_entries
,
4205 if (!_bfinfdpic_size_got_plt (obfd
, &gpinfo
))
4213 elf32_bfinfdpic_finish_dynamic_sections (bfd
*output_bfd
,
4214 struct bfd_link_info
*info
)
4219 dynobj
= elf_hash_table (info
)->dynobj
;
4221 if (bfinfdpic_got_section (info
))
4223 BFD_ASSERT (bfinfdpic_gotrel_section (info
)->size
4224 /* PR 17334: It appears that the GOT section can end up
4225 being bigger than the number of relocs. Presumably
4226 because some relocs have been deleted. A test case has
4227 yet to be generated for verify this, but in the meantime
4228 the test below has been changed from == to >= so that
4229 applications can continue to be built. */
4230 >= (bfinfdpic_gotrel_section (info
)->reloc_count
4231 * sizeof (Elf32_External_Rel
)));
4233 if (bfinfdpic_gotfixup_section (info
))
4235 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
4236 bfd_vma got_value
= hgot
->root
.u
.def
.value
4237 + hgot
->root
.u
.def
.section
->output_section
->vma
4238 + hgot
->root
.u
.def
.section
->output_offset
;
4240 _bfinfdpic_add_rofixup (output_bfd
, bfinfdpic_gotfixup_section (info
),
4243 if (bfinfdpic_gotfixup_section (info
)->size
4244 != (bfinfdpic_gotfixup_section (info
)->reloc_count
* 4))
4247 ("LINKER BUG: .rofixup section size mismatch");
4252 if (elf_hash_table (info
)->dynamic_sections_created
)
4254 BFD_ASSERT (bfinfdpic_pltrel_section (info
)->size
4255 == (bfinfdpic_pltrel_section (info
)->reloc_count
4256 * sizeof (Elf32_External_Rel
)));
4259 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4261 if (elf_hash_table (info
)->dynamic_sections_created
)
4263 Elf32_External_Dyn
* dyncon
;
4264 Elf32_External_Dyn
* dynconend
;
4266 BFD_ASSERT (sdyn
!= NULL
);
4268 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4269 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4271 for (; dyncon
< dynconend
; dyncon
++)
4273 Elf_Internal_Dyn dyn
;
4275 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4283 dyn
.d_un
.d_ptr
= bfinfdpic_got_section (info
)->output_section
->vma
4284 + bfinfdpic_got_section (info
)->output_offset
4285 + bfinfdpic_got_initial_offset (info
);
4286 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4290 dyn
.d_un
.d_ptr
= bfinfdpic_pltrel_section (info
)
4291 ->output_section
->vma
4292 + bfinfdpic_pltrel_section (info
)->output_offset
;
4293 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4297 dyn
.d_un
.d_val
= bfinfdpic_pltrel_section (info
)->size
;
4298 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4307 /* Adjust a symbol defined by a dynamic object and referenced by a
4311 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4312 struct elf_link_hash_entry
*h
)
4316 dynobj
= elf_hash_table (info
)->dynobj
;
4318 /* Make sure we know what is going on here. */
4319 BFD_ASSERT (dynobj
!= NULL
4323 && !h
->def_regular
)));
4325 /* If this is a weak symbol, and there is a real definition, the
4326 processor independent code will have arranged for us to see the
4327 real definition first, and we can just use the same value. */
4328 if (h
->is_weakalias
)
4330 struct elf_link_hash_entry
*def
= weakdef (h
);
4331 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
4332 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
4333 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
4339 /* Perform any actions needed for dynamic symbols. */
4342 elf32_bfinfdpic_finish_dynamic_symbol
4343 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4344 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4345 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
4346 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4351 /* Decide whether to attempt to turn absptr or lsda encodings in
4352 shared libraries into pcrel within the given input section. */
4355 bfinfdpic_elf_use_relative_eh_frame
4356 (bfd
*input_bfd ATTRIBUTE_UNUSED
,
4357 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4358 asection
*eh_frame_section ATTRIBUTE_UNUSED
)
4360 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4364 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4367 bfinfdpic_elf_encode_eh_address (bfd
*abfd
,
4368 struct bfd_link_info
*info
,
4369 asection
*osec
, bfd_vma offset
,
4370 asection
*loc_sec
, bfd_vma loc_offset
,
4373 struct elf_link_hash_entry
*h
;
4375 h
= elf_hash_table (info
)->hgot
;
4376 BFD_ASSERT (h
&& h
->root
.type
== bfd_link_hash_defined
);
4378 if (! h
|| (_bfinfdpic_osec_to_segment (abfd
, osec
)
4379 == _bfinfdpic_osec_to_segment (abfd
, loc_sec
->output_section
)))
4380 return _bfd_elf_encode_eh_address (abfd
, info
, osec
, offset
,
4381 loc_sec
, loc_offset
, encoded
);
4383 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd
, osec
)
4384 == (_bfinfdpic_osec_to_segment
4385 (abfd
, h
->root
.u
.def
.section
->output_section
)));
4387 *encoded
= osec
->vma
+ offset
4388 - (h
->root
.u
.def
.value
4389 + h
->root
.u
.def
.section
->output_section
->vma
4390 + h
->root
.u
.def
.section
->output_offset
);
4392 return DW_EH_PE_datarel
| DW_EH_PE_sdata4
;
4397 /* Look through the relocs for a section during the first phase.
4399 Besides handling virtual table relocs for gc, we have to deal with
4400 all sorts of PIC-related relocations. We describe below the
4401 general plan on how to handle such relocations, even though we only
4402 collect information at this point, storing them in hash tables for
4403 perusal of later passes.
4405 32 relocations are propagated to the linker output when creating
4406 position-independent output. LO16 and HI16 relocations are not
4407 supposed to be encountered in this case.
4409 LABEL16 should always be resolvable by the linker, since it's only
4412 LABEL24, on the other hand, is used by calls. If it turns out that
4413 the target of a call is a dynamic symbol, a PLT entry must be
4414 created for it, which triggers the creation of a private function
4415 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4417 GPREL relocations require the referenced symbol to be in the same
4418 segment as _gp, but this can only be checked later.
4420 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4421 exist. LABEL24 might as well, since it may require a PLT entry,
4422 that will require a got.
4424 Non-FUNCDESC GOT relocations require a GOT entry to be created
4425 regardless of whether the symbol is dynamic. However, since a
4426 global symbol that turns out to not be exported may have the same
4427 address of a non-dynamic symbol, we don't assign GOT entries at
4428 this point, such that we can share them in this case. A relocation
4429 for the GOT entry always has to be created, be it to offset a
4430 private symbol by the section load address, be it to get the symbol
4431 resolved dynamically.
4433 FUNCDESC GOT relocations require a GOT entry to be created, and
4434 handled as if a FUNCDESC relocation was applied to the GOT entry in
4437 FUNCDESC relocations referencing a symbol that turns out to NOT be
4438 dynamic cause a private function descriptor to be created. The
4439 FUNCDESC relocation then decays to a 32 relocation that points at
4440 the private descriptor. If the symbol is dynamic, the FUNCDESC
4441 relocation is propagated to the linker output, such that the
4442 dynamic linker creates the canonical descriptor, pointing to the
4443 dynamically-resolved definition of the function.
4445 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4446 symbols that are assigned to the same segment as the GOT, but we
4447 can only check this later, after we know the complete set of
4448 symbols defined and/or exported.
4450 FUNCDESC GOTOFF relocations require a function descriptor to be
4451 created and, unless lazy binding is disabled or the symbol is not
4452 dynamic, a lazy PLT entry. Since we can't tell at this point
4453 whether a symbol is going to be dynamic, we have to decide later
4454 whether to create a lazy PLT entry or bind the descriptor directly
4455 to the private function.
4457 FUNCDESC_VALUE relocations are not supposed to be present in object
4458 files, but they may very well be simply propagated to the linker
4459 output, since they have no side effect.
4462 A function descriptor always requires a FUNCDESC_VALUE relocation.
4463 Whether it's in .plt.rel or not depends on whether lazy binding is
4464 enabled and on whether the referenced symbol is dynamic.
4466 The existence of a lazy PLT requires the resolverStub lazy PLT
4467 entry to be present.
4470 As for assignment of GOT, PLT and lazy PLT entries, and private
4471 descriptors, we might do them all sequentially, but we can do
4472 better than that. For example, we can place GOT entries and
4473 private function descriptors referenced using 12-bit operands
4474 closer to the PIC register value, such that these relocations don't
4475 overflow. Those that are only referenced with LO16 relocations
4476 could come next, but we may as well place PLT-required function
4477 descriptors in the 12-bit range to make them shorter. Symbols
4478 referenced with LO16/HI16 may come next, but we may place
4479 additional function descriptors in the 16-bit range if we can
4480 reliably tell that we've already placed entries that are ever
4481 referenced with only LO16. PLT entries are therefore generated as
4482 small as possible, while not introducing relocation overflows in
4483 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4484 generated before or after PLT entries, but not intermingled with
4485 them, such that we can have more lazy PLT entries in range for a
4486 branch to the resolverStub. The resolverStub should be emitted at
4487 the most distant location from the first lazy PLT entry such that
4488 it's still in range for a branch, or closer, if there isn't a need
4489 for so many lazy PLT entries. Additional lazy PLT entries may be
4490 emitted after the resolverStub, as long as branches are still in
4491 range. If the branch goes out of range, longer lazy PLT entries
4494 We could further optimize PLT and lazy PLT entries by giving them
4495 priority in assignment to closer-to-gr17 locations depending on the
4496 number of occurrences of references to them (assuming a function
4497 that's called more often is more important for performance, so its
4498 PLT entry should be faster), or taking hints from the compiler.
4499 Given infinite time and money... :-) */
4502 bfinfdpic_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4503 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4505 Elf_Internal_Shdr
*symtab_hdr
;
4506 struct elf_link_hash_entry
**sym_hashes
;
4507 const Elf_Internal_Rela
*rel
;
4508 const Elf_Internal_Rela
*rel_end
;
4510 struct bfinfdpic_relocs_info
*picrel
;
4512 if (bfd_link_relocatable (info
))
4515 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4516 sym_hashes
= elf_sym_hashes (abfd
);
4518 dynobj
= elf_hash_table (info
)->dynobj
;
4519 rel_end
= relocs
+ sec
->reloc_count
;
4520 for (rel
= relocs
; rel
< rel_end
; rel
++)
4522 struct elf_link_hash_entry
*h
;
4523 unsigned long r_symndx
;
4525 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4526 if (r_symndx
< symtab_hdr
->sh_info
)
4530 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4531 while (h
->root
.type
== bfd_link_hash_indirect
4532 || h
->root
.type
== bfd_link_hash_warning
)
4533 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4536 switch (ELF32_R_TYPE (rel
->r_info
))
4538 case R_BFIN_GOT17M4
:
4541 case R_BFIN_FUNCDESC_GOT17M4
:
4542 case R_BFIN_FUNCDESC_GOTHI
:
4543 case R_BFIN_FUNCDESC_GOTLO
:
4544 case R_BFIN_GOTOFF17M4
:
4545 case R_BFIN_GOTOFFHI
:
4546 case R_BFIN_GOTOFFLO
:
4547 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4548 case R_BFIN_FUNCDESC_GOTOFFHI
:
4549 case R_BFIN_FUNCDESC_GOTOFFLO
:
4550 case R_BFIN_FUNCDESC
:
4551 case R_BFIN_FUNCDESC_VALUE
:
4552 if (! IS_FDPIC (abfd
))
4555 case R_BFIN_PCREL24
:
4556 case R_BFIN_PCREL24_JUMP_L
:
4557 case R_BFIN_BYTE4_DATA
:
4558 if (IS_FDPIC (abfd
) && ! dynobj
)
4560 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4561 if (! _bfin_create_got_section (abfd
, info
))
4564 if (! IS_FDPIC (abfd
))
4571 if (h
->dynindx
== -1)
4572 switch (ELF_ST_VISIBILITY (h
->other
))
4578 bfd_elf_link_record_dynamic_symbol (info
, h
);
4582 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4584 rel
->r_addend
, INSERT
);
4587 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4588 (info
), abfd
, r_symndx
,
4589 rel
->r_addend
, INSERT
);
4599 switch (ELF32_R_TYPE (rel
->r_info
))
4601 case R_BFIN_PCREL24
:
4602 case R_BFIN_PCREL24_JUMP_L
:
4603 if (IS_FDPIC (abfd
))
4607 case R_BFIN_FUNCDESC_VALUE
:
4608 picrel
->relocsfdv
++;
4609 if (bfd_section_flags (sec
) & SEC_ALLOC
)
4613 case R_BFIN_BYTE4_DATA
:
4614 if (! IS_FDPIC (abfd
))
4618 if (bfd_section_flags (sec
) & SEC_ALLOC
)
4622 case R_BFIN_GOT17M4
:
4631 case R_BFIN_FUNCDESC_GOT17M4
:
4632 picrel
->fdgot17m4
++;
4635 case R_BFIN_FUNCDESC_GOTHI
:
4636 case R_BFIN_FUNCDESC_GOTLO
:
4637 picrel
->fdgothilo
++;
4640 case R_BFIN_GOTOFF17M4
:
4641 case R_BFIN_GOTOFFHI
:
4642 case R_BFIN_GOTOFFLO
:
4646 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4647 picrel
->fdgoff17m4
++;
4650 case R_BFIN_FUNCDESC_GOTOFFHI
:
4651 case R_BFIN_FUNCDESC_GOTOFFLO
:
4652 picrel
->fdgoffhilo
++;
4655 case R_BFIN_FUNCDESC
:
4660 /* This relocation describes the C++ object vtable hierarchy.
4661 Reconstruct it for later use during GC. */
4662 case R_BFIN_GNU_VTINHERIT
:
4663 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4667 /* This relocation describes which C++ vtable entries are actually
4668 used. Record for later use during GC. */
4669 case R_BFIN_GNU_VTENTRY
:
4670 BFD_ASSERT (h
!= NULL
);
4672 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4676 case R_BFIN_HUIMM16
:
4677 case R_BFIN_LUIMM16
:
4678 case R_BFIN_PCREL12_JUMP_S
:
4679 case R_BFIN_PCREL10
:
4685 /* xgettext:c-format */
4686 (_("%pB: unsupported relocation type %#x"),
4687 abfd
, (int) ELF32_R_TYPE (rel
->r_info
));
4695 /* Set the right machine number for a Blackfin ELF file. */
4698 elf32_bfin_object_p (bfd
*abfd
)
4700 bfd_default_set_arch_mach (abfd
, bfd_arch_bfin
, 0);
4701 return (((elf_elfheader (abfd
)->e_flags
& EF_BFIN_FDPIC
) != 0)
4702 == (IS_FDPIC (abfd
)));
4706 elf32_bfin_set_private_flags (bfd
* abfd
, flagword flags
)
4708 elf_elfheader (abfd
)->e_flags
= flags
;
4709 elf_flags_init (abfd
) = TRUE
;
4713 /* Display the flags field. */
4715 elf32_bfin_print_private_bfd_data (bfd
* abfd
, void * ptr
)
4717 FILE *file
= (FILE *) ptr
;
4720 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
4722 /* Print normal ELF private data. */
4723 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
4725 flags
= elf_elfheader (abfd
)->e_flags
;
4727 /* xgettext:c-format */
4728 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
4730 if (flags
& EF_BFIN_PIC
)
4731 fprintf (file
, " -fpic");
4733 if (flags
& EF_BFIN_FDPIC
)
4734 fprintf (file
, " -mfdpic");
4741 /* Merge backend specific data from an object file to the output
4742 object file when linking. */
4745 elf32_bfin_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
4747 bfd
*obfd
= info
->output_bfd
;
4748 flagword old_flags
, new_flags
;
4749 bfd_boolean error
= FALSE
;
4751 /* FIXME: What should be checked when linking shared libraries? */
4752 if ((ibfd
->flags
& DYNAMIC
) != 0)
4755 new_flags
= elf_elfheader (ibfd
)->e_flags
;
4756 old_flags
= elf_elfheader (obfd
)->e_flags
;
4758 if (new_flags
& EF_BFIN_FDPIC
)
4759 new_flags
&= ~EF_BFIN_PIC
;
4765 ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %pB",
4766 old_flags
, new_flags
, elf_flags_init (obfd
) ? "yes" : "no", ibfd
);
4768 if (!elf_flags_init (obfd
)) /* First call, no flags set. */
4770 elf_flags_init (obfd
) = TRUE
;
4771 elf_elfheader (obfd
)->e_flags
= new_flags
;
4774 if (((new_flags
& EF_BFIN_FDPIC
) == 0) != (! IS_FDPIC (obfd
)))
4777 if (IS_FDPIC (obfd
))
4779 (_("%pB: cannot link non-fdpic object file into fdpic executable"),
4783 (_("%pB: cannot link fdpic object file into non-fdpic executable"),
4788 bfd_set_error (bfd_error_bad_value
);
4793 /* bfin ELF linker hash entry. */
4795 struct bfin_link_hash_entry
4797 struct elf_link_hash_entry root
;
4799 /* Number of PC relative relocs copied for this symbol. */
4800 struct bfin_pcrel_relocs_copied
*pcrel_relocs_copied
;
4803 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4805 static struct bfd_hash_entry
*
4806 bfin_link_hash_newfunc (struct bfd_hash_entry
*entry
,
4807 struct bfd_hash_table
*table
, const char *string
)
4809 struct bfd_hash_entry
*ret
= entry
;
4811 /* Allocate the structure if it has not already been allocated by a
4814 ret
= bfd_hash_allocate (table
, sizeof (struct bfin_link_hash_entry
));
4818 /* Call the allocation method of the superclass. */
4819 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
4821 bfin_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
4826 /* Create an bfin ELF linker hash table. */
4828 static struct bfd_link_hash_table
*
4829 bfin_link_hash_table_create (bfd
* abfd
)
4831 struct elf_link_hash_table
*ret
;
4832 size_t amt
= sizeof (struct elf_link_hash_table
);
4834 ret
= bfd_zmalloc (amt
);
4838 if (!_bfd_elf_link_hash_table_init (ret
, abfd
, bfin_link_hash_newfunc
,
4839 sizeof (struct elf_link_hash_entry
),
4849 /* The size in bytes of an entry in the procedure linkage table. */
4851 /* Finish up the dynamic sections. */
4854 bfin_finish_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4855 struct bfd_link_info
*info
)
4860 dynobj
= elf_hash_table (info
)->dynobj
;
4862 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4864 if (elf_hash_table (info
)->dynamic_sections_created
)
4866 Elf32_External_Dyn
*dyncon
, *dynconend
;
4868 BFD_ASSERT (sdyn
!= NULL
);
4870 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4871 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4872 for (; dyncon
< dynconend
; dyncon
++)
4874 Elf_Internal_Dyn dyn
;
4876 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4884 /* Finish up dynamic symbol handling. We set the contents of various
4885 dynamic sections here. */
4888 bfin_finish_dynamic_symbol (bfd
* output_bfd
,
4889 struct bfd_link_info
*info
,
4890 struct elf_link_hash_entry
*h
,
4891 Elf_Internal_Sym
* sym
)
4893 if (h
->got
.offset
!= (bfd_vma
) - 1)
4897 Elf_Internal_Rela rela
;
4900 /* This symbol has an entry in the global offset table.
4903 sgot
= elf_hash_table (info
)->sgot
;
4904 srela
= elf_hash_table (info
)->srelgot
;
4905 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
4907 rela
.r_offset
= (sgot
->output_section
->vma
4908 + sgot
->output_offset
4909 + (h
->got
.offset
& ~(bfd_vma
) 1));
4911 /* If this is a -Bsymbolic link, and the symbol is defined
4912 locally, we just want to emit a RELATIVE reloc. Likewise if
4913 the symbol was forced to be local because of a version file.
4914 The entry in the global offset table will already have been
4915 initialized in the relocate_section function. */
4916 if (bfd_link_pic (info
)
4918 || h
->dynindx
== -1 || h
->forced_local
) && h
->def_regular
)
4920 _bfd_error_handler (_("*** check this relocation %s"),
4922 rela
.r_info
= ELF32_R_INFO (0, R_BFIN_PCREL24
);
4923 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
4927 offset
& ~(bfd_vma
) 1)));
4931 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4932 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
4933 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_BFIN_GOT
);
4937 loc
= srela
->contents
;
4938 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
4939 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
4946 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4947 if (strcmp (h
->root
.root
.string
, "__DYNAMIC") == 0
4948 || h
== elf_hash_table (info
)->hgot
)
4949 sym
->st_shndx
= SHN_ABS
;
4954 /* Adjust a symbol defined by a dynamic object and referenced by a
4955 regular object. The current definition is in some section of the
4956 dynamic object, but we're not including those sections. We have to
4957 change the definition to something the rest of the link can
4961 bfin_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4962 struct elf_link_hash_entry
*h
)
4966 unsigned int power_of_two
;
4968 dynobj
= elf_hash_table (info
)->dynobj
;
4970 /* Make sure we know what is going on here. */
4971 BFD_ASSERT (dynobj
!= NULL
4974 || (h
->def_dynamic
&& h
->ref_regular
&& !h
->def_regular
)));
4976 /* If this is a function, put it in the procedure linkage table. We
4977 will fill in the contents of the procedure linkage table later,
4978 when we know the address of the .got section. */
4979 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
4984 /* If this is a weak symbol, and there is a real definition, the
4985 processor independent code will have arranged for us to see the
4986 real definition first, and we can just use the same value. */
4987 if (h
->is_weakalias
)
4989 struct elf_link_hash_entry
*def
= weakdef (h
);
4990 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
4991 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
4992 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
4996 /* This is a reference to a symbol defined by a dynamic object which
4997 is not a function. */
4999 /* If we are creating a shared library, we must presume that the
5000 only references to the symbol are via the global offset table.
5001 For such cases we need not do anything here; the relocations will
5002 be handled correctly by relocate_section. */
5003 if (bfd_link_pic (info
))
5006 /* We must allocate the symbol in our .dynbss section, which will
5007 become part of the .bss section of the executable. There will be
5008 an entry for this symbol in the .dynsym section. The dynamic
5009 object will contain position independent code, so all references
5010 from the dynamic object to this symbol will go through the global
5011 offset table. The dynamic linker will use the .dynsym entry to
5012 determine the address it must put in the global offset table, so
5013 both the dynamic object and the regular object will refer to the
5014 same memory location for the variable. */
5016 s
= bfd_get_linker_section (dynobj
, ".dynbss");
5017 BFD_ASSERT (s
!= NULL
);
5019 #if 0 /* Bfin does not currently have a COPY reloc. */
5020 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to
5021 copy the initial value out of the dynamic object and into the
5022 runtime process image. We need to remember the offset into the
5023 .rela.bss section we are going to use. */
5024 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5028 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
5029 BFD_ASSERT (srel
!= NULL
);
5030 srel
->size
+= sizeof (Elf32_External_Rela
);
5034 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5036 _bfd_error_handler (_("the bfin target does not currently support the generation of copy relocations"));
5040 /* We need to figure out the alignment required for this symbol. I
5041 have no idea how ELF linkers handle this. */
5042 power_of_two
= bfd_log2 (h
->size
);
5043 if (power_of_two
> 3)
5046 /* Apply the required alignment. */
5047 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
5048 if (power_of_two
> bfd_section_alignment (s
))
5050 if (!bfd_set_section_alignment (s
, power_of_two
))
5054 /* Define the symbol as being at this point in the section. */
5055 h
->root
.u
.def
.section
= s
;
5056 h
->root
.u
.def
.value
= s
->size
;
5058 /* Increment the section size to make room for the symbol. */
5064 /* The bfin linker needs to keep track of the number of relocs that it
5065 decides to copy in check_relocs for each symbol. This is so that it
5066 can discard PC relative relocs if it doesn't need them when linking
5067 with -Bsymbolic. We store the information in a field extending the
5068 regular ELF linker hash table. */
5070 /* This structure keeps track of the number of PC relative relocs we have
5071 copied for a given symbol. */
5073 struct bfin_pcrel_relocs_copied
5076 struct bfin_pcrel_relocs_copied
*next
;
5077 /* A section in dynobj. */
5079 /* Number of relocs copied in this section. */
5080 bfd_size_type count
;
5083 /* This function is called via elf_link_hash_traverse if we are
5084 creating a shared object. In the -Bsymbolic case it discards the
5085 space allocated to copy PC relative relocs against symbols which
5086 are defined in regular objects. For the normal shared case, it
5087 discards space for pc-relative relocs that have become local due to
5088 symbol visibility changes. We allocated space for them in the
5089 check_relocs routine, but we won't fill them in in the
5090 relocate_section routine.
5092 We also check whether any of the remaining relocations apply
5093 against a readonly section, and set the DF_TEXTREL flag in this
5097 bfin_discard_copies (struct elf_link_hash_entry
*h
, void * inf
)
5099 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5100 struct bfin_pcrel_relocs_copied
*s
;
5102 if (!h
->def_regular
|| (!info
->symbolic
&& !h
->forced_local
))
5104 if ((info
->flags
& DF_TEXTREL
) == 0)
5106 /* Look for relocations against read-only sections. */
5107 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5108 s
!= NULL
; s
= s
->next
)
5109 if ((s
->section
->flags
& SEC_READONLY
) != 0)
5111 info
->flags
|= DF_TEXTREL
;
5119 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5120 s
!= NULL
; s
= s
->next
)
5121 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
5127 bfin_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
5128 struct bfd_link_info
*info
)
5134 dynobj
= elf_hash_table (info
)->dynobj
;
5135 BFD_ASSERT (dynobj
!= NULL
);
5137 if (elf_hash_table (info
)->dynamic_sections_created
)
5139 /* Set the contents of the .interp section to the interpreter. */
5140 if (bfd_link_executable (info
) && !info
->nointerp
)
5142 s
= bfd_get_linker_section (dynobj
, ".interp");
5143 BFD_ASSERT (s
!= NULL
);
5144 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5145 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5150 /* We may have created entries in the .rela.got section.
5151 However, if we are not creating the dynamic sections, we will
5152 not actually use these entries. Reset the size of .rela.got,
5153 which will cause it to get stripped from the output file
5155 s
= elf_hash_table (info
)->srelgot
;
5160 /* If this is a -Bsymbolic shared link, then we need to discard all
5161 PC relative relocs against symbols defined in a regular object.
5162 For the normal shared case we discard the PC relative relocs
5163 against symbols that have become local due to visibility changes.
5164 We allocated space for them in the check_relocs routine, but we
5165 will not fill them in in the relocate_section routine. */
5166 if (bfd_link_pic (info
))
5167 elf_link_hash_traverse (elf_hash_table (info
),
5168 bfin_discard_copies
, info
);
5170 /* The check_relocs and adjust_dynamic_symbol entry points have
5171 determined the sizes of the various dynamic sections. Allocate
5174 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5179 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5182 /* It's OK to base decisions on the section name, because none
5183 of the dynobj section names depend upon the input files. */
5184 name
= bfd_section_name (s
);
5188 if (CONST_STRNEQ (name
, ".rela"))
5192 /* If we don't need this section, strip it from the
5193 output file. This is mostly to handle .rela.bss and
5194 .rela.plt. We must create both sections in
5195 create_dynamic_sections, because they must be created
5196 before the linker maps input sections to output
5197 sections. The linker does that before
5198 adjust_dynamic_symbol is called, and it is that
5199 function which decides whether anything needs to go
5200 into these sections. */
5207 /* We use the reloc_count field as a counter if we need
5208 to copy relocs into the output file. */
5212 else if (! CONST_STRNEQ (name
, ".got"))
5214 /* It's not one of our sections, so don't allocate space. */
5220 s
->flags
|= SEC_EXCLUDE
;
5224 /* Allocate memory for the section contents. */
5225 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5226 Unused entries should be reclaimed before the section's contents
5227 are written out, but at the moment this does not happen. Thus in
5228 order to prevent writing out garbage, we initialise the section's
5229 contents to zero. */
5230 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
5231 if (s
->contents
== NULL
&& s
->size
!= 0)
5235 if (elf_hash_table (info
)->dynamic_sections_created
)
5237 /* Add some entries to the .dynamic section. We fill in the
5238 values later, in bfin_finish_dynamic_sections, but we
5239 must add the entries now so that we get the correct size for
5240 the .dynamic section. The DT_DEBUG entry is filled in by the
5241 dynamic linker and used by the debugger. */
5242 #define add_dynamic_entry(TAG, VAL) \
5243 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5245 if (!bfd_link_pic (info
))
5247 if (!add_dynamic_entry (DT_DEBUG
, 0))
5254 if (!add_dynamic_entry (DT_RELA
, 0)
5255 || !add_dynamic_entry (DT_RELASZ
, 0)
5256 || !add_dynamic_entry (DT_RELAENT
,
5257 sizeof (Elf32_External_Rela
)))
5261 if ((info
->flags
& DF_TEXTREL
) != 0)
5263 if (!add_dynamic_entry (DT_TEXTREL
, 0))
5267 #undef add_dynamic_entry
5272 /* Given a .data section and a .emreloc in-memory section, store
5273 relocation information into the .emreloc section which can be
5274 used at runtime to relocate the section. This is called by the
5275 linker when the --embedded-relocs switch is used. This is called
5276 after the add_symbols entry point has been called for all the
5277 objects, and before the final_link entry point is called. */
5280 bfd_bfin_elf32_create_embedded_relocs (bfd
*abfd
,
5281 struct bfd_link_info
*info
,
5286 Elf_Internal_Shdr
*symtab_hdr
;
5287 Elf_Internal_Sym
*isymbuf
= NULL
;
5288 Elf_Internal_Rela
*internal_relocs
= NULL
;
5289 Elf_Internal_Rela
*irel
, *irelend
;
5293 BFD_ASSERT (! bfd_link_relocatable (info
));
5297 if (datasec
->reloc_count
== 0)
5300 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5302 /* Get a copy of the native relocations. */
5303 internal_relocs
= (_bfd_elf_link_read_relocs
5304 (abfd
, datasec
, NULL
, (Elf_Internal_Rela
*) NULL
,
5305 info
->keep_memory
));
5306 if (internal_relocs
== NULL
)
5309 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
5310 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
5311 if (relsec
->contents
== NULL
)
5314 p
= relsec
->contents
;
5316 irelend
= internal_relocs
+ datasec
->reloc_count
;
5317 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
5319 asection
*targetsec
;
5321 /* We are going to write a four byte longword into the runtime
5322 reloc section. The longword will be the address in the data
5323 section which must be relocated. It is followed by the name
5324 of the target section NUL-padded or truncated to 8
5327 /* We can only relocate absolute longword relocs at run time. */
5328 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_BFIN_BYTE4_DATA
)
5330 *errmsg
= _("unsupported relocation type");
5331 bfd_set_error (bfd_error_bad_value
);
5335 /* Get the target section referred to by the reloc. */
5336 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
5338 /* A local symbol. */
5339 Elf_Internal_Sym
*isym
;
5341 /* Read this BFD's local symbols if we haven't done so already. */
5342 if (isymbuf
== NULL
)
5344 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5345 if (isymbuf
== NULL
)
5346 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
5347 symtab_hdr
->sh_info
, 0,
5349 if (isymbuf
== NULL
)
5353 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
5354 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5359 struct elf_link_hash_entry
*h
;
5361 /* An external symbol. */
5362 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
5363 h
= elf_sym_hashes (abfd
)[indx
];
5364 BFD_ASSERT (h
!= NULL
);
5365 if (h
->root
.type
== bfd_link_hash_defined
5366 || h
->root
.type
== bfd_link_hash_defweak
)
5367 targetsec
= h
->root
.u
.def
.section
;
5372 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
5373 memset (p
+ 4, 0, 8);
5374 if (targetsec
!= NULL
)
5375 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
5378 if (symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5380 if (elf_section_data (datasec
)->relocs
!= internal_relocs
)
5381 free (internal_relocs
);
5385 if (symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5387 if (elf_section_data (datasec
)->relocs
!= internal_relocs
)
5388 free (internal_relocs
);
5392 struct bfd_elf_special_section
const elf32_bfin_special_sections
[] =
5394 { ".l1.text", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
5395 { ".l1.data", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
5396 { NULL
, 0, 0, 0, 0 }
5400 #define TARGET_LITTLE_SYM bfin_elf32_vec
5401 #define TARGET_LITTLE_NAME "elf32-bfin"
5402 #define ELF_ARCH bfd_arch_bfin
5403 #define ELF_TARGET_ID BFIN_ELF_DATA
5404 #define ELF_MACHINE_CODE EM_BLACKFIN
5405 #define ELF_MAXPAGESIZE 0x1000
5406 #define elf_symbol_leading_char '_'
5408 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5409 #define bfd_elf32_bfd_reloc_name_lookup \
5410 bfin_bfd_reloc_name_lookup
5411 #define elf_info_to_howto bfin_info_to_howto
5412 #define elf_info_to_howto_rel NULL
5413 #define elf_backend_object_p elf32_bfin_object_p
5415 #define bfd_elf32_bfd_is_local_label_name \
5416 bfin_is_local_label_name
5418 #define elf_backend_create_dynamic_sections \
5419 _bfd_elf_create_dynamic_sections
5420 #define bfd_elf32_bfd_link_hash_table_create \
5421 bfin_link_hash_table_create
5422 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5424 #define elf_backend_check_relocs bfin_check_relocs
5425 #define elf_backend_adjust_dynamic_symbol \
5426 bfin_adjust_dynamic_symbol
5427 #define elf_backend_size_dynamic_sections \
5428 bfin_size_dynamic_sections
5429 #define elf_backend_relocate_section bfin_relocate_section
5430 #define elf_backend_finish_dynamic_symbol \
5431 bfin_finish_dynamic_symbol
5432 #define elf_backend_finish_dynamic_sections \
5433 bfin_finish_dynamic_sections
5434 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5435 #define bfd_elf32_bfd_merge_private_bfd_data \
5436 elf32_bfin_merge_private_bfd_data
5437 #define bfd_elf32_bfd_set_private_flags \
5438 elf32_bfin_set_private_flags
5439 #define bfd_elf32_bfd_print_private_bfd_data \
5440 elf32_bfin_print_private_bfd_data
5441 #define elf_backend_final_write_processing \
5442 elf32_bfin_final_write_processing
5443 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5444 #define elf_backend_stack_align 8
5445 #define elf_backend_can_gc_sections 1
5446 #define elf_backend_special_sections elf32_bfin_special_sections
5447 #define elf_backend_can_refcount 1
5448 #define elf_backend_want_got_plt 0
5449 #define elf_backend_plt_readonly 1
5450 #define elf_backend_want_plt_sym 0
5451 #define elf_backend_got_header_size 12
5452 #define elf_backend_rela_normal 1
5454 #include "elf32-target.h"
5456 #undef TARGET_LITTLE_SYM
5457 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5458 #undef TARGET_LITTLE_NAME
5459 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5461 #define elf32_bed elf32_bfinfdpic_bed
5463 #undef elf_backend_got_header_size
5464 #define elf_backend_got_header_size 0
5466 #undef elf_backend_relocate_section
5467 #define elf_backend_relocate_section bfinfdpic_relocate_section
5468 #undef elf_backend_check_relocs
5469 #define elf_backend_check_relocs bfinfdpic_check_relocs
5471 #undef bfd_elf32_bfd_link_hash_table_create
5472 #define bfd_elf32_bfd_link_hash_table_create \
5473 bfinfdpic_elf_link_hash_table_create
5474 #undef elf_backend_always_size_sections
5475 #define elf_backend_always_size_sections \
5476 elf32_bfinfdpic_always_size_sections
5478 #undef elf_backend_create_dynamic_sections
5479 #define elf_backend_create_dynamic_sections \
5480 elf32_bfinfdpic_create_dynamic_sections
5481 #undef elf_backend_adjust_dynamic_symbol
5482 #define elf_backend_adjust_dynamic_symbol \
5483 elf32_bfinfdpic_adjust_dynamic_symbol
5484 #undef elf_backend_size_dynamic_sections
5485 #define elf_backend_size_dynamic_sections \
5486 elf32_bfinfdpic_size_dynamic_sections
5487 #undef elf_backend_finish_dynamic_symbol
5488 #define elf_backend_finish_dynamic_symbol \
5489 elf32_bfinfdpic_finish_dynamic_symbol
5490 #undef elf_backend_finish_dynamic_sections
5491 #define elf_backend_finish_dynamic_sections \
5492 elf32_bfinfdpic_finish_dynamic_sections
5494 #undef elf_backend_discard_info
5495 #define elf_backend_discard_info \
5496 bfinfdpic_elf_discard_info
5497 #undef elf_backend_can_make_relative_eh_frame
5498 #define elf_backend_can_make_relative_eh_frame \
5499 bfinfdpic_elf_use_relative_eh_frame
5500 #undef elf_backend_can_make_lsda_relative_eh_frame
5501 #define elf_backend_can_make_lsda_relative_eh_frame \
5502 bfinfdpic_elf_use_relative_eh_frame
5503 #undef elf_backend_encode_eh_address
5504 #define elf_backend_encode_eh_address \
5505 bfinfdpic_elf_encode_eh_address
5507 #undef elf_backend_may_use_rel_p
5508 #define elf_backend_may_use_rel_p 1
5509 #undef elf_backend_may_use_rela_p
5510 #define elf_backend_may_use_rela_p 1
5511 /* We use REL for dynamic relocations only. */
5512 #undef elf_backend_default_use_rela_p
5513 #define elf_backend_default_use_rela_p 1
5515 #undef elf_backend_omit_section_dynsym
5516 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5518 #include "elf32-target.h"