1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2018 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. */
29 /* FUNCTION : bfin_pltpc_reloc
30 ABSTRACT : TODO : figure out how to handle pltpc relocs. */
31 static bfd_reloc_status_type
33 bfd
*abfd ATTRIBUTE_UNUSED
,
34 arelent
*reloc_entry ATTRIBUTE_UNUSED
,
35 asymbol
*symbol ATTRIBUTE_UNUSED
,
36 void * data ATTRIBUTE_UNUSED
,
37 asection
*input_section ATTRIBUTE_UNUSED
,
38 bfd
*output_bfd ATTRIBUTE_UNUSED
,
39 char **error_message ATTRIBUTE_UNUSED
)
41 bfd_reloc_status_type flag
= bfd_reloc_ok
;
46 static bfd_reloc_status_type
47 bfin_pcrel24_reloc (bfd
*abfd
,
51 asection
*input_section
,
53 char **error_message ATTRIBUTE_UNUSED
)
56 bfd_size_type addr
= reloc_entry
->address
;
57 bfd_vma output_base
= 0;
58 reloc_howto_type
*howto
= reloc_entry
->howto
;
59 asection
*output_section
;
60 bfd_boolean relocatable
= (output_bfd
!= NULL
);
62 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
63 return bfd_reloc_outofrange
;
65 if (bfd_is_und_section (symbol
->section
)
66 && (symbol
->flags
& BSF_WEAK
) == 0
68 return bfd_reloc_undefined
;
70 if (bfd_is_com_section (symbol
->section
))
73 relocation
= symbol
->value
;
75 output_section
= symbol
->section
->output_section
;
80 output_base
= output_section
->vma
;
82 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
83 relocation
+= output_base
+ symbol
->section
->output_offset
;
85 if (!relocatable
&& !strcmp (symbol
->name
, symbol
->section
->name
))
86 relocation
+= reloc_entry
->addend
;
88 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
89 relocation
-= reloc_entry
->address
;
91 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
93 bfd_reloc_status_type status
;
94 status
= bfd_check_overflow (howto
->complain_on_overflow
,
97 bfd_arch_bits_per_address(abfd
),
99 if (status
!= bfd_reloc_ok
)
103 /* if rightshift is 1 and the number odd, return error. */
104 if (howto
->rightshift
&& (relocation
& 0x01))
106 _bfd_error_handler (_("relocation should be even number"));
107 return bfd_reloc_overflow
;
110 relocation
>>= (bfd_vma
) howto
->rightshift
;
111 /* Shift everything up to where it's going to be used. */
113 relocation
<<= (bfd_vma
) howto
->bitpos
;
117 reloc_entry
->address
+= input_section
->output_offset
;
118 reloc_entry
->addend
+= symbol
->section
->output_offset
;
124 /* We are getting reloc_entry->address 2 byte off from
125 the start of instruction. Assuming absolute postion
126 of the reloc data. But, following code had been written assuming
127 reloc address is starting at begining of instruction.
128 To compensate that I have increased the value of
129 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
132 x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
- 2);
133 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
134 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
- 2);
136 x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
);
137 x
= relocation
& 0xFFFF;
138 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
);
143 static bfd_reloc_status_type
144 bfin_imm16_reloc (bfd
*abfd
,
145 arelent
*reloc_entry
,
148 asection
*input_section
,
150 char **error_message ATTRIBUTE_UNUSED
)
152 bfd_vma relocation
, x
;
153 bfd_size_type reloc_addr
= reloc_entry
->address
;
154 bfd_vma output_base
= 0;
155 reloc_howto_type
*howto
= reloc_entry
->howto
;
156 asection
*output_section
;
157 bfd_boolean relocatable
= (output_bfd
!= NULL
);
159 /* Is the address of the relocation really within the section? */
160 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
161 return bfd_reloc_outofrange
;
163 if (bfd_is_und_section (symbol
->section
)
164 && (symbol
->flags
& BSF_WEAK
) == 0
166 return bfd_reloc_undefined
;
168 output_section
= symbol
->section
->output_section
;
169 relocation
= symbol
->value
;
171 /* Convert input-section-relative symbol value to absolute. */
175 output_base
= output_section
->vma
;
177 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
178 relocation
+= output_base
+ symbol
->section
->output_offset
;
180 /* Add in supplied addend. */
181 relocation
+= reloc_entry
->addend
;
185 reloc_entry
->address
+= input_section
->output_offset
;
186 reloc_entry
->addend
+= symbol
->section
->output_offset
;
190 reloc_entry
->addend
= 0;
193 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
195 bfd_reloc_status_type flag
;
196 flag
= bfd_check_overflow (howto
->complain_on_overflow
,
199 bfd_arch_bits_per_address(abfd
),
201 if (flag
!= bfd_reloc_ok
)
205 /* Here the variable relocation holds the final address of the
206 symbol we are relocating against, plus any addend. */
208 relocation
>>= (bfd_vma
) howto
->rightshift
;
210 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ reloc_addr
);
215 static bfd_reloc_status_type
216 bfin_byte4_reloc (bfd
*abfd
,
217 arelent
*reloc_entry
,
220 asection
*input_section
,
222 char **error_message ATTRIBUTE_UNUSED
)
224 bfd_vma relocation
, x
;
225 bfd_size_type addr
= reloc_entry
->address
;
226 bfd_vma output_base
= 0;
227 asection
*output_section
;
228 bfd_boolean relocatable
= (output_bfd
!= NULL
);
230 /* Is the address of the relocation really within the section? */
231 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
232 return bfd_reloc_outofrange
;
234 if (bfd_is_und_section (symbol
->section
)
235 && (symbol
->flags
& BSF_WEAK
) == 0
237 return bfd_reloc_undefined
;
239 output_section
= symbol
->section
->output_section
;
240 relocation
= symbol
->value
;
241 /* Convert input-section-relative symbol value to absolute. */
245 output_base
= output_section
->vma
;
248 && symbol
->section
->name
249 && !strcmp (symbol
->name
, symbol
->section
->name
))
252 relocation
+= output_base
+ symbol
->section
->output_offset
;
255 relocation
+= reloc_entry
->addend
;
259 /* This output will be relocatable ... like ld -r. */
260 reloc_entry
->address
+= input_section
->output_offset
;
261 reloc_entry
->addend
+= symbol
->section
->output_offset
;
265 reloc_entry
->addend
= 0;
268 /* Here the variable relocation holds the final address of the
269 symbol we are relocating against, plus any addend. */
270 x
= relocation
& 0xFFFF0000;
272 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
+ 2);
274 x
= relocation
& 0x0000FFFF;
275 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
);
279 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
280 Use this instead of bfd_perform_relocation. */
281 static bfd_reloc_status_type
282 bfin_bfd_reloc (bfd
*abfd
,
283 arelent
*reloc_entry
,
286 asection
*input_section
,
288 char **error_message ATTRIBUTE_UNUSED
)
291 bfd_size_type addr
= reloc_entry
->address
;
292 bfd_vma output_base
= 0;
293 reloc_howto_type
*howto
= reloc_entry
->howto
;
294 asection
*output_section
;
295 bfd_boolean relocatable
= (output_bfd
!= NULL
);
297 /* Is the address of the relocation really within the section? */
298 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
299 return bfd_reloc_outofrange
;
301 if (bfd_is_und_section (symbol
->section
)
302 && (symbol
->flags
& BSF_WEAK
) == 0
304 return bfd_reloc_undefined
;
306 /* Get symbol value. (Common symbols are special.) */
307 if (bfd_is_com_section (symbol
->section
))
310 relocation
= symbol
->value
;
312 output_section
= symbol
->section
->output_section
;
314 /* Convert input-section-relative symbol value to absolute. */
318 output_base
= output_section
->vma
;
320 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
321 relocation
+= output_base
+ symbol
->section
->output_offset
;
323 if (!relocatable
&& !strcmp (symbol
->name
, symbol
->section
->name
))
325 /* Add in supplied addend. */
326 relocation
+= reloc_entry
->addend
;
329 /* Here the variable relocation holds the final address of the
330 symbol we are relocating against, plus any addend. */
332 if (howto
->pc_relative
)
334 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
336 if (howto
->pcrel_offset
)
337 relocation
-= reloc_entry
->address
;
342 reloc_entry
->address
+= input_section
->output_offset
;
343 reloc_entry
->addend
+= symbol
->section
->output_offset
;
346 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
348 bfd_reloc_status_type status
;
350 status
= bfd_check_overflow (howto
->complain_on_overflow
,
353 bfd_arch_bits_per_address(abfd
),
355 if (status
!= bfd_reloc_ok
)
359 /* If rightshift is 1 and the number odd, return error. */
360 if (howto
->rightshift
&& (relocation
& 0x01))
362 _bfd_error_handler (_("relocation should be even number"));
363 return bfd_reloc_overflow
;
366 relocation
>>= (bfd_vma
) howto
->rightshift
;
368 /* Shift everything up to where it's going to be used. */
370 relocation
<<= (bfd_vma
) howto
->bitpos
;
373 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
375 /* handle 8 and 16 bit relocations here. */
380 char x
= bfd_get_8 (abfd
, (char *) data
+ addr
);
382 bfd_put_8 (abfd
, x
, (unsigned char *) data
+ addr
);
388 unsigned short x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
);
390 bfd_put_16 (abfd
, (bfd_vma
) x
, (unsigned char *) data
+ addr
);
395 return bfd_reloc_other
;
401 /* HOWTO Table for blackfin.
402 Blackfin relocations are fairly complicated.
403 Some of the salient features are
404 a. Even numbered offsets. A number of (not all) relocations are
405 even numbered. This means that the rightmost bit is not stored.
406 Needs to right shift by 1 and check to see if value is not odd
407 b. A relocation can be an expression. An expression takes on
408 a variety of relocations arranged in a stack.
409 As a result, we cannot use the standard generic function as special
410 function. We will have our own, which is very similar to the standard
411 generic function except that it understands how to get the value from
412 the relocation stack. . */
414 #define BFIN_RELOC_MIN 0
415 #define BFIN_RELOC_MAX 0x21
416 #define BFIN_GNUEXT_RELOC_MIN 0x40
417 #define BFIN_GNUEXT_RELOC_MAX 0x43
418 #define BFIN_ARELOC_MIN 0xE0
419 #define BFIN_ARELOC_MAX 0xF3
421 static reloc_howto_type bfin_howto_table
[] =
423 /* This reloc does nothing. . */
424 HOWTO (R_BFIN_UNUSED0
, /* type. */
426 3, /* size (0 = byte, 1 = short, 2 = long). */
428 FALSE
, /* pc_relative. */
430 complain_overflow_dont
, /* complain_on_overflow. */
431 bfd_elf_generic_reloc
, /* special_function. */
432 "R_BFIN_UNUSED0", /* name. */
433 FALSE
, /* partial_inplace. */
436 FALSE
), /* pcrel_offset. */
438 HOWTO (R_BFIN_PCREL5M2
, /* type. */
440 1, /* size (0 = byte, 1 = short, 2 = long).. */
442 TRUE
, /* pc_relative. */
444 complain_overflow_unsigned
, /* complain_on_overflow. */
445 bfin_bfd_reloc
, /* special_function. */
446 "R_BFIN_PCREL5M2", /* name. */
447 FALSE
, /* partial_inplace. */
449 0x0000000F, /* dst_mask. */
450 FALSE
), /* pcrel_offset. */
452 HOWTO (R_BFIN_UNUSED1
, /* type. */
454 3, /* size (0 = byte, 1 = short, 2 = long). */
456 FALSE
, /* pc_relative. */
458 complain_overflow_dont
, /* complain_on_overflow. */
459 bfd_elf_generic_reloc
, /* special_function. */
460 "R_BFIN_UNUSED1", /* name. */
461 FALSE
, /* partial_inplace. */
464 FALSE
), /* pcrel_offset. */
466 HOWTO (R_BFIN_PCREL10
, /* type. */
468 1, /* size (0 = byte, 1 = short, 2 = long). */
470 TRUE
, /* pc_relative. */
472 complain_overflow_signed
, /* complain_on_overflow. */
473 bfin_bfd_reloc
, /* special_function. */
474 "R_BFIN_PCREL10", /* name. */
475 FALSE
, /* partial_inplace. */
477 0x000003FF, /* dst_mask. */
478 TRUE
), /* pcrel_offset. */
480 HOWTO (R_BFIN_PCREL12_JUMP
, /* type. */
482 /* the offset is actually 13 bit
483 aligned on a word boundary so
484 only 12 bits have to be used.
485 Right shift the rightmost bit.. */
486 1, /* size (0 = byte, 1 = short, 2 = long). */
488 TRUE
, /* pc_relative. */
490 complain_overflow_signed
, /* complain_on_overflow. */
491 bfin_bfd_reloc
, /* special_function. */
492 "R_BFIN_PCREL12_JUMP", /* name. */
493 FALSE
, /* partial_inplace. */
495 0x0FFF, /* dst_mask. */
496 TRUE
), /* pcrel_offset. */
498 HOWTO (R_BFIN_RIMM16
, /* type. */
500 1, /* size (0 = byte, 1 = short, 2 = long). */
502 FALSE
, /* pc_relative. */
504 complain_overflow_signed
, /* complain_on_overflow. */
505 bfin_imm16_reloc
, /* special_function. */
506 "R_BFIN_RIMM16", /* name. */
507 FALSE
, /* partial_inplace. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE
), /* pcrel_offset. */
512 HOWTO (R_BFIN_LUIMM16
, /* type. */
514 1, /* size (0 = byte, 1 = short, 2 = long). */
516 FALSE
, /* pc_relative. */
518 complain_overflow_dont
, /* complain_on_overflow. */
519 bfin_imm16_reloc
, /* special_function. */
520 "R_BFIN_LUIMM16", /* name. */
521 FALSE
, /* partial_inplace. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE
), /* pcrel_offset. */
526 HOWTO (R_BFIN_HUIMM16
, /* type. */
527 16, /* rightshift. */
528 1, /* size (0 = byte, 1 = short, 2 = long). */
530 FALSE
, /* pc_relative. */
532 complain_overflow_unsigned
, /* complain_on_overflow. */
533 bfin_imm16_reloc
, /* special_function. */
534 "R_BFIN_HUIMM16", /* name. */
535 FALSE
, /* partial_inplace. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE
), /* pcrel_offset. */
540 HOWTO (R_BFIN_PCREL12_JUMP_S
, /* type. */
542 1, /* size (0 = byte, 1 = short, 2 = long). */
544 TRUE
, /* pc_relative. */
546 complain_overflow_signed
, /* complain_on_overflow. */
547 bfin_bfd_reloc
, /* special_function. */
548 "R_BFIN_PCREL12_JUMP_S", /* name. */
549 FALSE
, /* partial_inplace. */
551 0x00000FFF, /* dst_mask. */
552 TRUE
), /* pcrel_offset. */
554 HOWTO (R_BFIN_PCREL24_JUMP_X
, /* type. */
556 2, /* size (0 = byte, 1 = short, 2 = long). */
558 TRUE
, /* pc_relative. */
560 complain_overflow_signed
, /* complain_on_overflow. */
561 bfin_pcrel24_reloc
, /* special_function. */
562 "R_BFIN_PCREL24_JUMP_X", /* name. */
563 FALSE
, /* partial_inplace. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE
), /* pcrel_offset. */
568 HOWTO (R_BFIN_PCREL24
, /* type. */
570 2, /* size (0 = byte, 1 = short, 2 = long). */
572 TRUE
, /* pc_relative. */
574 complain_overflow_signed
, /* complain_on_overflow. */
575 bfin_pcrel24_reloc
, /* special_function. */
576 "R_BFIN_PCREL24", /* name. */
577 FALSE
, /* partial_inplace. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE
), /* pcrel_offset. */
582 HOWTO (R_BFIN_UNUSEDB
, /* type. */
584 3, /* size (0 = byte, 1 = short, 2 = long). */
586 FALSE
, /* pc_relative. */
588 complain_overflow_dont
, /* complain_on_overflow. */
589 bfd_elf_generic_reloc
, /* special_function. */
590 "R_BFIN_UNUSEDB", /* name. */
591 FALSE
, /* partial_inplace. */
594 FALSE
), /* pcrel_offset. */
596 HOWTO (R_BFIN_UNUSEDC
, /* type. */
598 3, /* size (0 = byte, 1 = short, 2 = long). */
600 FALSE
, /* pc_relative. */
602 complain_overflow_dont
, /* complain_on_overflow. */
603 bfd_elf_generic_reloc
, /* special_function. */
604 "R_BFIN_UNUSEDC", /* name. */
605 FALSE
, /* partial_inplace. */
608 FALSE
), /* pcrel_offset. */
610 HOWTO (R_BFIN_PCREL24_JUMP_L
, /* type. */
612 2, /* size (0 = byte, 1 = short, 2 = long). */
614 TRUE
, /* pc_relative. */
616 complain_overflow_signed
, /* complain_on_overflow. */
617 bfin_pcrel24_reloc
, /* special_function. */
618 "R_BFIN_PCREL24_JUMP_L", /* name. */
619 FALSE
, /* partial_inplace. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE
), /* pcrel_offset. */
624 HOWTO (R_BFIN_PCREL24_CALL_X
, /* type. */
626 2, /* size (0 = byte, 1 = short, 2 = long). */
628 TRUE
, /* pc_relative. */
630 complain_overflow_signed
, /* complain_on_overflow. */
631 bfin_pcrel24_reloc
, /* special_function. */
632 "R_BFIN_PCREL24_CALL_X", /* name. */
633 FALSE
, /* partial_inplace. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE
), /* pcrel_offset. */
638 HOWTO (R_BFIN_VAR_EQ_SYMB
, /* type. */
640 2, /* size (0 = byte, 1 = short, 2 = long). */
642 FALSE
, /* pc_relative. */
644 complain_overflow_bitfield
, /* complain_on_overflow. */
645 bfin_bfd_reloc
, /* special_function. */
646 "R_BFIN_VAR_EQ_SYMB", /* name. */
647 FALSE
, /* partial_inplace. */
650 FALSE
), /* pcrel_offset. */
652 HOWTO (R_BFIN_BYTE_DATA
, /* type. */
654 0, /* size (0 = byte, 1 = short, 2 = long). */
656 FALSE
, /* pc_relative. */
658 complain_overflow_unsigned
, /* complain_on_overflow. */
659 bfin_bfd_reloc
, /* special_function. */
660 "R_BFIN_BYTE_DATA", /* name. */
661 FALSE
, /* partial_inplace. */
663 0xFF, /* dst_mask. */
664 TRUE
), /* pcrel_offset. */
666 HOWTO (R_BFIN_BYTE2_DATA
, /* type. */
668 1, /* size (0 = byte, 1 = short, 2 = long). */
670 FALSE
, /* pc_relative. */
672 complain_overflow_signed
, /* complain_on_overflow. */
673 bfin_bfd_reloc
, /* special_function. */
674 "R_BFIN_BYTE2_DATA", /* name. */
675 FALSE
, /* partial_inplace. */
677 0xFFFF, /* dst_mask. */
678 TRUE
), /* pcrel_offset. */
680 HOWTO (R_BFIN_BYTE4_DATA
, /* type. */
682 2, /* size (0 = byte, 1 = short, 2 = long). */
684 FALSE
, /* pc_relative. */
686 complain_overflow_unsigned
, /* complain_on_overflow. */
687 bfin_byte4_reloc
, /* special_function. */
688 "R_BFIN_BYTE4_DATA", /* name. */
689 FALSE
, /* partial_inplace. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE
), /* pcrel_offset. */
694 HOWTO (R_BFIN_PCREL11
, /* type. */
696 1, /* size (0 = byte, 1 = short, 2 = long). */
698 TRUE
, /* pc_relative. */
700 complain_overflow_unsigned
, /* complain_on_overflow. */
701 bfin_bfd_reloc
, /* special_function. */
702 "R_BFIN_PCREL11", /* name. */
703 FALSE
, /* partial_inplace. */
705 0x000003FF, /* dst_mask. */
706 FALSE
), /* pcrel_offset. */
709 /* A 18-bit signed operand with the GOT offset for the address of
711 HOWTO (R_BFIN_GOT17M4
, /* type */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
715 FALSE
, /* pc_relative */
717 complain_overflow_signed
, /* complain_on_overflow */
718 bfd_elf_generic_reloc
, /* special_function */
719 "R_BFIN_GOT17M4", /* name */
720 FALSE
, /* partial_inplace */
721 0xffff, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE
), /* pcrel_offset */
725 /* The upper 16 bits of the GOT offset for the address of the
727 HOWTO (R_BFIN_GOTHI
, /* type */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
731 FALSE
, /* pc_relative */
733 complain_overflow_dont
, /* complain_on_overflow */
734 bfd_elf_generic_reloc
, /* special_function */
735 "R_BFIN_GOTHI", /* name */
736 FALSE
, /* partial_inplace */
737 0xffff, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE
), /* pcrel_offset */
741 /* The lower 16 bits of the GOT offset for the address of the
743 HOWTO (R_BFIN_GOTLO
, /* type */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
747 FALSE
, /* pc_relative */
749 complain_overflow_dont
, /* complain_on_overflow */
750 bfd_elf_generic_reloc
, /* special_function */
751 "R_BFIN_GOTLO", /* name */
752 FALSE
, /* partial_inplace */
753 0xffff, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE
), /* pcrel_offset */
757 /* The 32-bit address of the canonical descriptor of a function. */
758 HOWTO (R_BFIN_FUNCDESC
, /* type */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
762 FALSE
, /* pc_relative */
764 complain_overflow_bitfield
, /* complain_on_overflow */
765 bfd_elf_generic_reloc
, /* special_function */
766 "R_BFIN_FUNCDESC", /* name */
767 FALSE
, /* partial_inplace */
768 0xffffffff, /* src_mask */
769 0xffffffff, /* dst_mask */
770 FALSE
), /* pcrel_offset */
772 /* A 12-bit signed operand with the GOT offset for the address of
773 canonical descriptor of a function. */
774 HOWTO (R_BFIN_FUNCDESC_GOT17M4
, /* type */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
778 FALSE
, /* pc_relative */
780 complain_overflow_signed
, /* complain_on_overflow */
781 bfd_elf_generic_reloc
, /* special_function */
782 "R_BFIN_FUNCDESC_GOT17M4", /* name */
783 FALSE
, /* partial_inplace */
784 0xffff, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE
), /* pcrel_offset */
788 /* The upper 16 bits of the GOT offset for the address of the
789 canonical descriptor of a function. */
790 HOWTO (R_BFIN_FUNCDESC_GOTHI
, /* type */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
794 FALSE
, /* pc_relative */
796 complain_overflow_dont
, /* complain_on_overflow */
797 bfd_elf_generic_reloc
, /* special_function */
798 "R_BFIN_FUNCDESC_GOTHI", /* name */
799 FALSE
, /* partial_inplace */
800 0xffff, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE
), /* pcrel_offset */
804 /* The lower 16 bits of the GOT offset for the address of the
805 canonical descriptor of a function. */
806 HOWTO (R_BFIN_FUNCDESC_GOTLO
, /* type */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
810 FALSE
, /* pc_relative */
812 complain_overflow_dont
, /* complain_on_overflow */
813 bfd_elf_generic_reloc
, /* special_function */
814 "R_BFIN_FUNCDESC_GOTLO", /* name */
815 FALSE
, /* partial_inplace */
816 0xffff, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE
), /* pcrel_offset */
820 /* The 32-bit address of the canonical descriptor of a function. */
821 HOWTO (R_BFIN_FUNCDESC_VALUE
, /* type */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
825 FALSE
, /* pc_relative */
827 complain_overflow_bitfield
, /* complain_on_overflow */
828 bfd_elf_generic_reloc
, /* special_function */
829 "R_BFIN_FUNCDESC_VALUE", /* name */
830 FALSE
, /* partial_inplace */
831 0xffffffff, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE
), /* pcrel_offset */
835 /* A 12-bit signed operand with the GOT offset for the address of
836 canonical descriptor of a function. */
837 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4
, /* type */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
841 FALSE
, /* pc_relative */
843 complain_overflow_signed
, /* complain_on_overflow */
844 bfd_elf_generic_reloc
, /* special_function */
845 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
846 FALSE
, /* partial_inplace */
847 0xffff, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE
), /* pcrel_offset */
851 /* The upper 16 bits of the GOT offset for the address of the
852 canonical descriptor of a function. */
853 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI
, /* type */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
857 FALSE
, /* pc_relative */
859 complain_overflow_dont
, /* complain_on_overflow */
860 bfd_elf_generic_reloc
, /* special_function */
861 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
862 FALSE
, /* partial_inplace */
863 0xffff, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE
), /* pcrel_offset */
867 /* The lower 16 bits of the GOT offset for the address of the
868 canonical descriptor of a function. */
869 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO
, /* type */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
873 FALSE
, /* pc_relative */
875 complain_overflow_dont
, /* complain_on_overflow */
876 bfd_elf_generic_reloc
, /* special_function */
877 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
878 FALSE
, /* partial_inplace */
879 0xffff, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE
), /* pcrel_offset */
883 /* A 12-bit signed operand with the GOT offset for the address of
885 HOWTO (R_BFIN_GOTOFF17M4
, /* type */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
889 FALSE
, /* pc_relative */
891 complain_overflow_signed
, /* complain_on_overflow */
892 bfd_elf_generic_reloc
, /* special_function */
893 "R_BFIN_GOTOFF17M4", /* name */
894 FALSE
, /* partial_inplace */
895 0xffff, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE
), /* pcrel_offset */
899 /* The upper 16 bits of the GOT offset for the address of the
901 HOWTO (R_BFIN_GOTOFFHI
, /* type */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
905 FALSE
, /* pc_relative */
907 complain_overflow_dont
, /* complain_on_overflow */
908 bfd_elf_generic_reloc
, /* special_function */
909 "R_BFIN_GOTOFFHI", /* name */
910 FALSE
, /* partial_inplace */
911 0xffff, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE
), /* pcrel_offset */
915 /* The lower 16 bits of the GOT offset for the address of the
917 HOWTO (R_BFIN_GOTOFFLO
, /* type */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
921 FALSE
, /* pc_relative */
923 complain_overflow_dont
, /* complain_on_overflow */
924 bfd_elf_generic_reloc
, /* special_function */
925 "R_BFIN_GOTOFFLO", /* name */
926 FALSE
, /* partial_inplace */
927 0xffff, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE
), /* pcrel_offset */
932 static reloc_howto_type bfin_gnuext_howto_table
[] =
934 HOWTO (R_BFIN_PLTPC
, /* type. */
936 1, /* size (0 = byte, 1 = short, 2 = long). */
938 FALSE
, /* pc_relative. */
940 complain_overflow_bitfield
, /* complain_on_overflow. */
941 bfin_pltpc_reloc
, /* special_function. */
942 "R_BFIN_PLTPC", /* name. */
943 FALSE
, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE
), /* pcrel_offset. */
948 HOWTO (R_BFIN_GOT
, /* type. */
950 1, /* size (0 = byte, 1 = short, 2 = long). */
952 FALSE
, /* pc_relative. */
954 complain_overflow_bitfield
, /* complain_on_overflow. */
955 bfd_elf_generic_reloc
, /* special_function. */
956 "R_BFIN_GOT", /* name. */
957 FALSE
, /* partial_inplace. */
958 0x7fff, /* src_mask. */
959 0x7fff, /* dst_mask. */
960 FALSE
), /* pcrel_offset. */
962 /* GNU extension to record C++ vtable hierarchy. */
963 HOWTO (R_BFIN_GNU_VTINHERIT
, /* type. */
965 2, /* size (0 = byte, 1 = short, 2 = long). */
967 FALSE
, /* pc_relative. */
969 complain_overflow_dont
, /* complain_on_overflow. */
970 NULL
, /* special_function. */
971 "R_BFIN_GNU_VTINHERIT", /* name. */
972 FALSE
, /* partial_inplace. */
975 FALSE
), /* pcrel_offset. */
977 /* GNU extension to record C++ vtable member usage. */
978 HOWTO (R_BFIN_GNU_VTENTRY
, /* type. */
980 2, /* size (0 = byte, 1 = short, 2 = long). */
982 FALSE
, /* pc_relative. */
984 complain_overflow_dont
, /* complain_on_overflow. */
985 _bfd_elf_rel_vtable_reloc_fn
, /* special_function. */
986 "R_BFIN_GNU_VTENTRY", /* name. */
987 FALSE
, /* partial_inplace. */
990 FALSE
) /* pcrel_offset. */
993 struct bfin_reloc_map
995 bfd_reloc_code_real_type bfd_reloc_val
;
996 unsigned int bfin_reloc_val
;
999 static const struct bfin_reloc_map bfin_reloc_map
[] =
1001 { BFD_RELOC_NONE
, R_BFIN_UNUSED0
},
1002 { BFD_RELOC_BFIN_5_PCREL
, R_BFIN_PCREL5M2
},
1003 { BFD_RELOC_NONE
, R_BFIN_UNUSED1
},
1004 { BFD_RELOC_BFIN_10_PCREL
, R_BFIN_PCREL10
},
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP
, R_BFIN_PCREL12_JUMP
},
1006 { BFD_RELOC_BFIN_16_IMM
, R_BFIN_RIMM16
},
1007 { BFD_RELOC_BFIN_16_LOW
, R_BFIN_LUIMM16
},
1008 { BFD_RELOC_BFIN_16_HIGH
, R_BFIN_HUIMM16
},
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S
, R_BFIN_PCREL12_JUMP_S
},
1010 { BFD_RELOC_24_PCREL
, R_BFIN_PCREL24
},
1011 { BFD_RELOC_24_PCREL
, R_BFIN_PCREL24
},
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L
, R_BFIN_PCREL24_JUMP_L
},
1013 { BFD_RELOC_NONE
, R_BFIN_UNUSEDB
},
1014 { BFD_RELOC_NONE
, R_BFIN_UNUSEDC
},
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X
, R_BFIN_PCREL24_CALL_X
},
1016 { BFD_RELOC_8
, R_BFIN_BYTE_DATA
},
1017 { BFD_RELOC_16
, R_BFIN_BYTE2_DATA
},
1018 { BFD_RELOC_32
, R_BFIN_BYTE4_DATA
},
1019 { BFD_RELOC_BFIN_11_PCREL
, R_BFIN_PCREL11
},
1020 { BFD_RELOC_BFIN_GOT
, R_BFIN_GOT
},
1021 { BFD_RELOC_BFIN_PLTPC
, R_BFIN_PLTPC
},
1023 { BFD_RELOC_BFIN_GOT17M4
, R_BFIN_GOT17M4
},
1024 { BFD_RELOC_BFIN_GOTHI
, R_BFIN_GOTHI
},
1025 { BFD_RELOC_BFIN_GOTLO
, R_BFIN_GOTLO
},
1026 { BFD_RELOC_BFIN_FUNCDESC
, R_BFIN_FUNCDESC
},
1027 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4
, R_BFIN_FUNCDESC_GOT17M4
},
1028 { BFD_RELOC_BFIN_FUNCDESC_GOTHI
, R_BFIN_FUNCDESC_GOTHI
},
1029 { BFD_RELOC_BFIN_FUNCDESC_GOTLO
, R_BFIN_FUNCDESC_GOTLO
},
1030 { BFD_RELOC_BFIN_FUNCDESC_VALUE
, R_BFIN_FUNCDESC_VALUE
},
1031 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4
, R_BFIN_FUNCDESC_GOTOFF17M4
},
1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI
, R_BFIN_FUNCDESC_GOTOFFHI
},
1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO
, R_BFIN_FUNCDESC_GOTOFFLO
},
1034 { BFD_RELOC_BFIN_GOTOFF17M4
, R_BFIN_GOTOFF17M4
},
1035 { BFD_RELOC_BFIN_GOTOFFHI
, R_BFIN_GOTOFFHI
},
1036 { BFD_RELOC_BFIN_GOTOFFLO
, R_BFIN_GOTOFFLO
},
1038 { BFD_RELOC_VTABLE_INHERIT
, R_BFIN_GNU_VTINHERIT
},
1039 { BFD_RELOC_VTABLE_ENTRY
, R_BFIN_GNU_VTENTRY
},
1044 bfin_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
1046 Elf_Internal_Rela
*dst
)
1048 unsigned int r_type
;
1050 r_type
= ELF32_R_TYPE (dst
->r_info
);
1052 if (r_type
<= BFIN_RELOC_MAX
)
1053 cache_ptr
->howto
= &bfin_howto_table
[r_type
];
1055 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1056 cache_ptr
->howto
= &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1059 cache_ptr
->howto
= (reloc_howto_type
*) NULL
;
1062 /* Given a BFD reloc type, return the howto. */
1063 static reloc_howto_type
*
1064 bfin_bfd_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1065 bfd_reloc_code_real_type code
)
1068 unsigned int r_type
= (unsigned int) -1;
1070 for (i
= sizeof (bfin_reloc_map
) / sizeof (bfin_reloc_map
[0]); i
--;)
1071 if (bfin_reloc_map
[i
].bfd_reloc_val
== code
)
1072 r_type
= bfin_reloc_map
[i
].bfin_reloc_val
;
1074 if (r_type
<= BFIN_RELOC_MAX
)
1075 return &bfin_howto_table
[r_type
];
1077 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1078 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1080 return (reloc_howto_type
*) NULL
;
1083 static reloc_howto_type
*
1084 bfin_bfd_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1090 i
< (sizeof (bfin_howto_table
)
1091 / sizeof (bfin_howto_table
[0]));
1093 if (bfin_howto_table
[i
].name
!= NULL
1094 && strcasecmp (bfin_howto_table
[i
].name
, r_name
) == 0)
1095 return &bfin_howto_table
[i
];
1098 i
< (sizeof (bfin_gnuext_howto_table
)
1099 / sizeof (bfin_gnuext_howto_table
[0]));
1101 if (bfin_gnuext_howto_table
[i
].name
!= NULL
1102 && strcasecmp (bfin_gnuext_howto_table
[i
].name
, r_name
) == 0)
1103 return &bfin_gnuext_howto_table
[i
];
1108 /* Given a bfin relocation type, return the howto. */
1109 static reloc_howto_type
*
1110 bfin_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1111 unsigned int r_type
)
1113 if (r_type
<= BFIN_RELOC_MAX
)
1114 return &bfin_howto_table
[r_type
];
1116 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1117 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1119 return (reloc_howto_type
*) NULL
;
1122 /* Set by ld emulation if --code-in-l1. */
1123 bfd_boolean elf32_bfin_code_in_l1
= 0;
1125 /* Set by ld emulation if --data-in-l1. */
1126 bfd_boolean elf32_bfin_data_in_l1
= 0;
1129 elf32_bfin_final_write_processing (bfd
*abfd
,
1130 bfd_boolean linker ATTRIBUTE_UNUSED
)
1132 if (elf32_bfin_code_in_l1
)
1133 elf_elfheader (abfd
)->e_flags
|= EF_BFIN_CODE_IN_L1
;
1134 if (elf32_bfin_data_in_l1
)
1135 elf_elfheader (abfd
)->e_flags
|= EF_BFIN_DATA_IN_L1
;
1138 /* Return TRUE if the name is a local label.
1139 bfin local labels begin with L$. */
1141 bfin_is_local_label_name (bfd
*abfd
, const char *label
)
1143 if (label
[0] == 'L' && label
[1] == '$' )
1146 return _bfd_elf_is_local_label_name (abfd
, label
);
1149 /* Look through the relocs for a section during the first phase, and
1150 allocate space in the global offset table or procedure linkage
1154 bfin_check_relocs (bfd
* abfd
,
1155 struct bfd_link_info
*info
,
1157 const Elf_Internal_Rela
*relocs
)
1160 Elf_Internal_Shdr
*symtab_hdr
;
1161 struct elf_link_hash_entry
**sym_hashes
;
1162 bfd_signed_vma
*local_got_refcounts
;
1163 const Elf_Internal_Rela
*rel
;
1164 const Elf_Internal_Rela
*rel_end
;
1168 if (bfd_link_relocatable (info
))
1171 dynobj
= elf_hash_table (info
)->dynobj
;
1172 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1173 sym_hashes
= elf_sym_hashes (abfd
);
1174 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1179 rel_end
= relocs
+ sec
->reloc_count
;
1180 for (rel
= relocs
; rel
< rel_end
; rel
++)
1182 unsigned long r_symndx
;
1183 struct elf_link_hash_entry
*h
;
1185 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1186 if (r_symndx
< symtab_hdr
->sh_info
)
1190 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1193 switch (ELF32_R_TYPE (rel
->r_info
))
1195 /* This relocation describes the C++ object vtable hierarchy.
1196 Reconstruct it for later use during GC. */
1197 case R_BFIN_GNU_VTINHERIT
:
1198 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1202 /* This relocation describes which C++ vtable entries
1203 are actually used. Record for later use during GC. */
1204 case R_BFIN_GNU_VTENTRY
:
1205 BFD_ASSERT (h
!= NULL
);
1207 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1213 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1219 /* Create the .got section. */
1220 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1221 if (!_bfd_elf_create_got_section (dynobj
, info
))
1225 sgot
= elf_hash_table (info
)->sgot
;
1226 srelgot
= elf_hash_table (info
)->srelgot
;
1227 BFD_ASSERT (sgot
!= NULL
);
1231 if (h
->got
.refcount
== 0)
1233 /* Make sure this symbol is output as a dynamic symbol. */
1234 if (h
->dynindx
== -1 && !h
->forced_local
)
1236 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
1240 /* Allocate space in the .got section. */
1242 /* Allocate relocation space. */
1243 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1249 /* This is a global offset table entry for a local symbol. */
1250 if (local_got_refcounts
== NULL
)
1254 size
= symtab_hdr
->sh_info
;
1255 size
*= sizeof (bfd_signed_vma
);
1256 local_got_refcounts
= ((bfd_signed_vma
*)
1257 bfd_zalloc (abfd
, size
));
1258 if (local_got_refcounts
== NULL
)
1260 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1262 if (local_got_refcounts
[r_symndx
] == 0)
1265 if (bfd_link_pic (info
))
1267 /* If we are generating a shared object, we need to
1268 output a R_68K_RELATIVE reloc so that the dynamic
1269 linker can adjust this GOT entry. */
1270 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1273 local_got_refcounts
[r_symndx
]++;
1285 static enum elf_reloc_type_class
1286 elf32_bfin_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1287 const asection
*rel_sec ATTRIBUTE_UNUSED
,
1288 const Elf_Internal_Rela
* rela
)
1290 switch ((int) ELF32_R_TYPE (rela
->r_info
))
1293 return reloc_class_normal
;
1297 static bfd_reloc_status_type
1298 bfin_final_link_relocate (Elf_Internal_Rela
*rel
, reloc_howto_type
*howto
,
1299 bfd
*input_bfd
, asection
*input_section
,
1300 bfd_byte
*contents
, bfd_vma address
,
1301 bfd_vma value
, bfd_vma addend
)
1303 int r_type
= ELF32_R_TYPE (rel
->r_info
);
1305 if (r_type
== R_BFIN_PCREL24
|| r_type
== R_BFIN_PCREL24_JUMP_L
)
1307 bfd_reloc_status_type r
= bfd_reloc_ok
;
1310 if (address
> bfd_get_section_limit (input_bfd
, input_section
))
1311 return bfd_reloc_outofrange
;
1315 /* Perform usual pc-relative correction. */
1316 value
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
1319 /* We are getting reloc_entry->address 2 byte off from
1320 the start of instruction. Assuming absolute postion
1321 of the reloc data. But, following code had been written assuming
1322 reloc address is starting at begining of instruction.
1323 To compensate that I have increased the value of
1324 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1329 if ((value
& 0xFF000000) != 0
1330 && (value
& 0xFF000000) != 0xFF000000)
1331 r
= bfd_reloc_overflow
;
1335 x
= bfd_get_16 (input_bfd
, contents
+ address
);
1336 x
= (x
& 0xff00) | ((value
>> 16) & 0xff);
1337 bfd_put_16 (input_bfd
, x
, contents
+ address
);
1339 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
1341 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
1345 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
, contents
,
1346 rel
->r_offset
, value
, addend
);
1351 bfin_relocate_section (bfd
* output_bfd
,
1352 struct bfd_link_info
*info
,
1354 asection
* input_section
,
1355 bfd_byte
* contents
,
1356 Elf_Internal_Rela
* relocs
,
1357 Elf_Internal_Sym
* local_syms
,
1358 asection
** local_sections
)
1361 Elf_Internal_Shdr
*symtab_hdr
;
1362 struct elf_link_hash_entry
**sym_hashes
;
1363 bfd_vma
*local_got_offsets
;
1365 Elf_Internal_Rela
*rel
;
1366 Elf_Internal_Rela
*relend
;
1369 dynobj
= elf_hash_table (info
)->dynobj
;
1370 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1371 sym_hashes
= elf_sym_hashes (input_bfd
);
1372 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1377 relend
= relocs
+ input_section
->reloc_count
;
1378 for (; rel
< relend
; rel
++, i
++)
1381 reloc_howto_type
*howto
;
1382 unsigned long r_symndx
;
1383 struct elf_link_hash_entry
*h
;
1384 Elf_Internal_Sym
*sym
;
1386 bfd_vma relocation
= 0;
1387 bfd_boolean unresolved_reloc
;
1388 bfd_reloc_status_type r
;
1391 r_type
= ELF32_R_TYPE (rel
->r_info
);
1392 if (r_type
< 0 || r_type
>= 243)
1394 bfd_set_error (bfd_error_bad_value
);
1398 if (r_type
== R_BFIN_GNU_VTENTRY
1399 || r_type
== R_BFIN_GNU_VTINHERIT
)
1402 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
1405 bfd_set_error (bfd_error_bad_value
);
1408 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1413 unresolved_reloc
= FALSE
;
1415 if (r_symndx
< symtab_hdr
->sh_info
)
1417 sym
= local_syms
+ r_symndx
;
1418 sec
= local_sections
[r_symndx
];
1419 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1423 bfd_boolean warned
, ignored
;
1425 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1426 r_symndx
, symtab_hdr
, sym_hashes
,
1428 unresolved_reloc
, warned
, ignored
);
1431 if (sec
!= NULL
&& discarded_section (sec
))
1432 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1433 rel
, 1, relend
, howto
, 0, contents
);
1435 if (bfd_link_relocatable (info
))
1438 address
= rel
->r_offset
;
1440 /* Then, process normally. */
1443 case R_BFIN_GNU_VTINHERIT
:
1444 case R_BFIN_GNU_VTENTRY
:
1445 return bfd_reloc_ok
;
1448 /* Relocation is to the address of the entry for this symbol
1449 in the global offset table. */
1451 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1454 /* Relocation is the offset of the entry for this symbol in
1455 the global offset table. */
1462 /* Create the .got section. */
1463 elf_hash_table (info
)->dynobj
= dynobj
= output_bfd
;
1464 if (!_bfd_elf_create_got_section (dynobj
, info
))
1468 sgot
= elf_hash_table (info
)->sgot
;
1469 BFD_ASSERT (sgot
!= NULL
);
1475 off
= h
->got
.offset
;
1476 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1477 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
1479 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1480 bfd_link_pic (info
),
1482 || (bfd_link_pic (info
)
1488 /* This is actually a static link, or it is a
1489 -Bsymbolic link and the symbol is defined
1490 locally, or the symbol was forced to be local
1491 because of a version file.. We must initialize
1492 this entry in the global offset table. Since
1493 the offset must always be a multiple of 4, we
1494 use the least significant bit to record whether
1495 we have initialized it already.
1497 When doing a dynamic link, we create a .rela.got
1498 relocation entry to initialize the value. This
1499 is done in the finish_dynamic_symbol routine. */
1504 bfd_put_32 (output_bfd
, relocation
,
1505 sgot
->contents
+ off
);
1510 unresolved_reloc
= FALSE
;
1514 BFD_ASSERT (local_got_offsets
!= NULL
);
1515 off
= local_got_offsets
[r_symndx
];
1516 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1518 /* The offset must always be a multiple of 4. We use
1519 the least significant bit to record whether we have
1520 already generated the necessary reloc. */
1525 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1527 if (bfd_link_pic (info
))
1530 Elf_Internal_Rela outrel
;
1533 s
= elf_hash_table (info
)->srelgot
;
1534 BFD_ASSERT (s
!= NULL
);
1536 outrel
.r_offset
= (sgot
->output_section
->vma
1537 + sgot
->output_offset
+ off
);
1539 ELF32_R_INFO (0, R_BFIN_PCREL24
);
1540 outrel
.r_addend
= relocation
;
1543 s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1544 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1547 local_got_offsets
[r_symndx
] |= 1;
1551 relocation
= sgot
->output_offset
+ off
;
1553 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1560 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
1562 relocation
, rel
->r_addend
);
1567 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1568 because such sections are not SEC_ALLOC and thus ld.so will
1569 not process them. */
1570 if (unresolved_reloc
1571 && !((input_section
->flags
& SEC_DEBUGGING
) != 0 && h
->def_dynamic
)
1572 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1573 rel
->r_offset
) != (bfd_vma
) -1)
1576 /* xgettext:c-format */
1577 (_("%pB(%pA+%#" PRIx64
"): "
1578 "unresolvable relocation against symbol `%s'"),
1579 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
1580 h
->root
.root
.string
);
1584 if (r
!= bfd_reloc_ok
)
1589 name
= h
->root
.root
.string
;
1592 name
= bfd_elf_string_from_elf_section (input_bfd
,
1593 symtab_hdr
->sh_link
,
1598 name
= bfd_section_name (input_bfd
, sec
);
1601 if (r
== bfd_reloc_overflow
)
1602 (*info
->callbacks
->reloc_overflow
)
1603 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1604 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1608 /* xgettext:c-format */
1609 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
1610 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
1621 bfin_gc_mark_hook (asection
* sec
,
1622 struct bfd_link_info
*info
,
1623 Elf_Internal_Rela
* rel
,
1624 struct elf_link_hash_entry
*h
,
1625 Elf_Internal_Sym
* sym
)
1628 switch (ELF32_R_TYPE (rel
->r_info
))
1630 case R_BFIN_GNU_VTINHERIT
:
1631 case R_BFIN_GNU_VTENTRY
:
1635 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1638 extern const bfd_target bfin_elf32_fdpic_vec
;
1639 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1641 /* An extension of the elf hash table data structure,
1642 containing some additional Blackfin-specific data. */
1643 struct bfinfdpic_elf_link_hash_table
1645 struct elf_link_hash_table elf
;
1647 /* A pointer to the .rofixup section. */
1648 asection
*sgotfixup
;
1649 /* GOT base offset. */
1651 /* Location of the first non-lazy PLT entry, i.e., the number of
1652 bytes taken by lazy PLT entries. */
1654 /* A hash table holding information about which symbols were
1655 referenced with which PIC-related relocations. */
1656 struct htab
*relocs_info
;
1657 /* Summary reloc information collected by
1658 _bfinfdpic_count_got_plt_entries. */
1659 struct _bfinfdpic_dynamic_got_info
*g
;
1662 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1664 #define bfinfdpic_hash_table(info) \
1665 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1666 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1668 #define bfinfdpic_got_section(info) \
1669 (bfinfdpic_hash_table (info)->elf.sgot)
1670 #define bfinfdpic_gotrel_section(info) \
1671 (bfinfdpic_hash_table (info)->elf.srelgot)
1672 #define bfinfdpic_gotfixup_section(info) \
1673 (bfinfdpic_hash_table (info)->sgotfixup)
1674 #define bfinfdpic_plt_section(info) \
1675 (bfinfdpic_hash_table (info)->elf.splt)
1676 #define bfinfdpic_pltrel_section(info) \
1677 (bfinfdpic_hash_table (info)->elf.srelplt)
1678 #define bfinfdpic_relocs_info(info) \
1679 (bfinfdpic_hash_table (info)->relocs_info)
1680 #define bfinfdpic_got_initial_offset(info) \
1681 (bfinfdpic_hash_table (info)->got0)
1682 #define bfinfdpic_plt_initial_offset(info) \
1683 (bfinfdpic_hash_table (info)->plt0)
1684 #define bfinfdpic_dynamic_got_plt_info(info) \
1685 (bfinfdpic_hash_table (info)->g)
1687 /* The name of the dynamic interpreter. This is put in the .interp
1690 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1692 #define DEFAULT_STACK_SIZE 0x20000
1694 /* This structure is used to collect the number of entries present in
1695 each addressable range of the got. */
1696 struct _bfinfdpic_dynamic_got_info
1698 /* Several bits of information about the current link. */
1699 struct bfd_link_info
*info
;
1700 /* Total size needed for GOT entries within the 18- or 32-bit
1702 bfd_vma got17m4
, gothilo
;
1703 /* Total size needed for function descriptor entries within the 18-
1704 or 32-bit ranges. */
1705 bfd_vma fd17m4
, fdhilo
;
1706 /* Total size needed function descriptor entries referenced in PLT
1707 entries, that would be profitable to place in offsets close to
1708 the PIC register. */
1710 /* Total size needed by lazy PLT entries. */
1712 /* Number of relocations carried over from input object files. */
1713 unsigned long relocs
;
1714 /* Number of fixups introduced by relocations in input object files. */
1715 unsigned long fixups
;
1718 /* Create a Blackfin ELF linker hash table. */
1720 static struct bfd_link_hash_table
*
1721 bfinfdpic_elf_link_hash_table_create (bfd
*abfd
)
1723 struct bfinfdpic_elf_link_hash_table
*ret
;
1724 bfd_size_type amt
= sizeof (struct bfinfdpic_elf_link_hash_table
);
1726 ret
= bfd_zmalloc (amt
);
1730 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1731 _bfd_elf_link_hash_newfunc
,
1732 sizeof (struct elf_link_hash_entry
),
1739 return &ret
->elf
.root
;
1742 /* Decide whether a reference to a symbol can be resolved locally or
1743 not. If the symbol is protected, we want the local address, but
1744 its function descriptor must be assigned by the dynamic linker. */
1745 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1746 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1747 || ! elf_hash_table (INFO)->dynamic_sections_created)
1748 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1749 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1751 /* This structure collects information on what kind of GOT, PLT or
1752 function descriptors are required by relocations that reference a
1754 struct bfinfdpic_relocs_info
1756 /* The index of the symbol, as stored in the relocation r_info, if
1757 we have a local symbol; -1 otherwise. */
1761 /* The input bfd in which the symbol is defined, if it's a local
1764 /* If symndx == -1, the hash table entry corresponding to a global
1765 symbol (even if it turns out to bind locally, in which case it
1766 should ideally be replaced with section's symndx + addend). */
1767 struct elf_link_hash_entry
*h
;
1769 /* The addend of the relocation that references the symbol. */
1772 /* The fields above are used to identify an entry. The fields below
1773 contain information on how an entry is used and, later on, which
1774 locations it was assigned. */
1775 /* The following 2 fields record whether the symbol+addend above was
1776 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1777 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1780 /* Whether a FUNCDESC relocation references symbol+addend. */
1782 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1785 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1786 unsigned fdgoff17m4
;
1787 unsigned fdgoffhilo
;
1788 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1789 GOTOFFHI relocations. The addend doesn't really matter, since we
1790 envision that this will only be used to check whether the symbol
1791 is mapped to the same segment as the got. */
1793 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1795 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1798 /* Whether we need a PLT entry for a symbol. Should be implied by
1800 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1802 /* Whether a function descriptor should be created in this link unit
1803 for symbol+addend. Should be implied by something like:
1804 (plt || fdgotoff17m4 || fdgotofflohi
1805 || ((fd || fdgot17m4 || fdgothilo)
1806 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1808 /* Whether a lazy PLT entry is needed for this symbol+addend.
1809 Should be implied by something like:
1810 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1811 && ! (info->flags & DF_BIND_NOW)) */
1813 /* Whether we've already emitted GOT relocations and PLT entries as
1814 needed for this symbol. */
1817 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1818 relocations referencing the symbol. */
1819 unsigned relocs32
, relocsfd
, relocsfdv
;
1821 /* The number of .rofixups entries and dynamic relocations allocated
1822 for this symbol, minus any that might have already been used. */
1823 unsigned fixups
, dynrelocs
;
1825 /* The offsets of the GOT entries assigned to symbol+addend, to the
1826 function descriptor's address, and to a function descriptor,
1827 respectively. Should be zero if unassigned. The offsets are
1828 counted from the value that will be assigned to the PIC register,
1829 not from the beginning of the .got section. */
1830 bfd_signed_vma got_entry
, fdgot_entry
, fd_entry
;
1831 /* The offsets of the PLT entries assigned to symbol+addend,
1832 non-lazy and lazy, respectively. If unassigned, should be
1834 bfd_vma plt_entry
, lzplt_entry
;
1837 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1839 bfinfdpic_relocs_info_hash (const void *entry_
)
1841 const struct bfinfdpic_relocs_info
*entry
= entry_
;
1843 return (entry
->symndx
== -1
1844 ? (long) entry
->d
.h
->root
.root
.hash
1845 : entry
->symndx
+ (long) entry
->d
.abfd
->id
* 257) + entry
->addend
;
1848 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1851 bfinfdpic_relocs_info_eq (const void *entry1
, const void *entry2
)
1853 const struct bfinfdpic_relocs_info
*e1
= entry1
;
1854 const struct bfinfdpic_relocs_info
*e2
= entry2
;
1856 return e1
->symndx
== e2
->symndx
&& e1
->addend
== e2
->addend
1857 && (e1
->symndx
== -1 ? e1
->d
.h
== e2
->d
.h
: e1
->d
.abfd
== e2
->d
.abfd
);
1860 /* Find or create an entry in a hash table HT that matches the key
1861 fields of the given ENTRY. If it's not found, memory for a new
1862 entry is allocated in ABFD's obstack. */
1863 static struct bfinfdpic_relocs_info
*
1864 bfinfdpic_relocs_info_find (struct htab
*ht
,
1866 const struct bfinfdpic_relocs_info
*entry
,
1867 enum insert_option insert
)
1869 struct bfinfdpic_relocs_info
**loc
;
1874 loc
= (struct bfinfdpic_relocs_info
**) htab_find_slot (ht
, entry
, insert
);
1882 *loc
= bfd_zalloc (abfd
, sizeof (**loc
));
1887 (*loc
)->symndx
= entry
->symndx
;
1888 (*loc
)->d
= entry
->d
;
1889 (*loc
)->addend
= entry
->addend
;
1890 (*loc
)->plt_entry
= (bfd_vma
)-1;
1891 (*loc
)->lzplt_entry
= (bfd_vma
)-1;
1896 /* Obtain the address of the entry in HT associated with H's symbol +
1897 addend, creating a new entry if none existed. ABFD is only used
1898 for memory allocation purposes. */
1899 inline static struct bfinfdpic_relocs_info
*
1900 bfinfdpic_relocs_info_for_global (struct htab
*ht
,
1902 struct elf_link_hash_entry
*h
,
1904 enum insert_option insert
)
1906 struct bfinfdpic_relocs_info entry
;
1910 entry
.addend
= addend
;
1912 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1915 /* Obtain the address of the entry in HT associated with the SYMNDXth
1916 local symbol of the input bfd ABFD, plus the addend, creating a new
1917 entry if none existed. */
1918 inline static struct bfinfdpic_relocs_info
*
1919 bfinfdpic_relocs_info_for_local (struct htab
*ht
,
1923 enum insert_option insert
)
1925 struct bfinfdpic_relocs_info entry
;
1927 entry
.symndx
= symndx
;
1928 entry
.d
.abfd
= abfd
;
1929 entry
.addend
= addend
;
1931 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1934 /* Merge fields set by check_relocs() of two entries that end up being
1935 mapped to the same (presumably global) symbol. */
1938 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info
*e2
,
1939 struct bfinfdpic_relocs_info
const *e1
)
1941 e2
->got17m4
|= e1
->got17m4
;
1942 e2
->gothilo
|= e1
->gothilo
;
1944 e2
->fdgot17m4
|= e1
->fdgot17m4
;
1945 e2
->fdgothilo
|= e1
->fdgothilo
;
1946 e2
->fdgoff17m4
|= e1
->fdgoff17m4
;
1947 e2
->fdgoffhilo
|= e1
->fdgoffhilo
;
1948 e2
->gotoff
|= e1
->gotoff
;
1949 e2
->call
|= e1
->call
;
1953 /* Every block of 65535 lazy PLT entries shares a single call to the
1954 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1955 32767, counting from 0). All other lazy PLT entries branch to it
1956 in a single instruction. */
1958 #define LZPLT_RESOLVER_EXTRA 10
1959 #define LZPLT_NORMAL_SIZE 6
1960 #define LZPLT_ENTRIES 1362
1962 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1963 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1965 /* Add a dynamic relocation to the SRELOC section. */
1967 inline static bfd_vma
1968 _bfinfdpic_add_dyn_reloc (bfd
*output_bfd
, asection
*sreloc
, bfd_vma offset
,
1969 int reloc_type
, long dynindx
, bfd_vma addend
,
1970 struct bfinfdpic_relocs_info
*entry
)
1972 Elf_Internal_Rela outrel
;
1973 bfd_vma reloc_offset
;
1975 outrel
.r_offset
= offset
;
1976 outrel
.r_info
= ELF32_R_INFO (dynindx
, reloc_type
);
1977 outrel
.r_addend
= addend
;
1979 reloc_offset
= sreloc
->reloc_count
* sizeof (Elf32_External_Rel
);
1980 BFD_ASSERT (reloc_offset
< sreloc
->size
);
1981 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1982 sreloc
->contents
+ reloc_offset
);
1983 sreloc
->reloc_count
++;
1985 /* If the entry's index is zero, this relocation was probably to a
1986 linkonce section that got discarded. We reserved a dynamic
1987 relocation, but it was for another entry than the one we got at
1988 the time of emitting the relocation. Unfortunately there's no
1989 simple way for us to catch this situation, since the relocation
1990 is cleared right before calling relocate_section, at which point
1991 we no longer know what the relocation used to point to. */
1994 BFD_ASSERT (entry
->dynrelocs
> 0);
1998 return reloc_offset
;
2001 /* Add a fixup to the ROFIXUP section. */
2004 _bfinfdpic_add_rofixup (bfd
*output_bfd
, asection
*rofixup
, bfd_vma offset
,
2005 struct bfinfdpic_relocs_info
*entry
)
2007 bfd_vma fixup_offset
;
2009 if (rofixup
->flags
& SEC_EXCLUDE
)
2012 fixup_offset
= rofixup
->reloc_count
* 4;
2013 if (rofixup
->contents
)
2015 BFD_ASSERT (fixup_offset
< rofixup
->size
);
2016 bfd_put_32 (output_bfd
, offset
, rofixup
->contents
+ fixup_offset
);
2018 rofixup
->reloc_count
++;
2020 if (entry
&& entry
->symndx
)
2022 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2024 BFD_ASSERT (entry
->fixups
> 0);
2028 return fixup_offset
;
2031 /* Find the segment number in which OSEC, and output section, is
2035 _bfinfdpic_osec_to_segment (bfd
*output_bfd
, asection
*osec
)
2037 Elf_Internal_Phdr
*p
= _bfd_elf_find_segment_containing_section (output_bfd
, osec
);
2039 return (p
!= NULL
) ? p
- elf_tdata (output_bfd
)->phdr
: -1;
2042 inline static bfd_boolean
2043 _bfinfdpic_osec_readonly_p (bfd
*output_bfd
, asection
*osec
)
2045 unsigned seg
= _bfinfdpic_osec_to_segment (output_bfd
, osec
);
2047 return ! (elf_tdata (output_bfd
)->phdr
[seg
].p_flags
& PF_W
);
2050 /* Generate relocations for GOT entries, function descriptors, and
2051 code for PLT and lazy PLT entries. */
2053 inline static bfd_boolean
2054 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info
*entry
,
2056 struct bfd_link_info
*info
,
2058 Elf_Internal_Sym
*sym
,
2061 bfd_vma fd_lazy_rel_offset
= (bfd_vma
) -1;
2068 if (entry
->got_entry
|| entry
->fdgot_entry
|| entry
->fd_entry
)
2070 /* If the symbol is dynamic, consider it for dynamic
2071 relocations, otherwise decay to section + offset. */
2072 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1)
2073 dynindx
= entry
->d
.h
->dynindx
;
2077 && sec
->output_section
2078 && ! bfd_is_abs_section (sec
->output_section
)
2079 && ! bfd_is_und_section (sec
->output_section
))
2080 dynindx
= elf_section_data (sec
->output_section
)->dynindx
;
2086 /* Generate relocation for GOT entry pointing to the symbol. */
2087 if (entry
->got_entry
)
2090 bfd_vma ad
= addend
;
2092 /* If the symbol is dynamic but binds locally, use
2094 if (sec
&& (entry
->symndx
!= -1
2095 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2097 if (entry
->symndx
== -1)
2098 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2100 ad
+= sym
->st_value
;
2101 ad
+= sec
->output_offset
;
2102 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2103 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2108 /* If we're linking an executable at a fixed address, we can
2109 omit the dynamic relocation as long as the symbol is local to
2111 if (bfd_link_pde (info
)
2112 && (entry
->symndx
!= -1
2113 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2116 ad
+= sec
->output_section
->vma
;
2117 if (entry
->symndx
!= -1
2118 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2119 _bfinfdpic_add_rofixup (output_bfd
,
2120 bfinfdpic_gotfixup_section (info
),
2121 bfinfdpic_got_section (info
)->output_section
2123 + bfinfdpic_got_section (info
)->output_offset
2124 + bfinfdpic_got_initial_offset (info
)
2125 + entry
->got_entry
, entry
);
2128 _bfinfdpic_add_dyn_reloc (output_bfd
, bfinfdpic_gotrel_section (info
),
2129 _bfd_elf_section_offset
2131 bfinfdpic_got_section (info
),
2132 bfinfdpic_got_initial_offset (info
)
2134 + bfinfdpic_got_section (info
)
2135 ->output_section
->vma
2136 + bfinfdpic_got_section (info
)->output_offset
,
2137 R_BFIN_BYTE4_DATA
, idx
, ad
, entry
);
2139 bfd_put_32 (output_bfd
, ad
,
2140 bfinfdpic_got_section (info
)->contents
2141 + bfinfdpic_got_initial_offset (info
)
2142 + entry
->got_entry
);
2145 /* Generate relocation for GOT entry pointing to a canonical
2146 function descriptor. */
2147 if (entry
->fdgot_entry
)
2152 if (! (entry
->symndx
== -1
2153 && entry
->d
.h
->root
.type
== bfd_link_hash_undefweak
2154 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2156 /* If the symbol is dynamic and there may be dynamic symbol
2157 resolution because we are, or are linked with, a shared
2158 library, emit a FUNCDESC relocation such that the dynamic
2159 linker will allocate the function descriptor. If the
2160 symbol needs a non-local function descriptor but binds
2161 locally (e.g., its visibility is protected, emit a
2162 dynamic relocation decayed to section+offset. */
2163 if (entry
->symndx
== -1
2164 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)
2165 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)
2166 && !bfd_link_pde (info
))
2168 reloc
= R_BFIN_FUNCDESC
;
2169 idx
= elf_section_data (entry
->d
.h
->root
.u
.def
.section
2170 ->output_section
)->dynindx
;
2171 ad
= entry
->d
.h
->root
.u
.def
.section
->output_offset
2172 + entry
->d
.h
->root
.u
.def
.value
;
2174 else if (entry
->symndx
== -1
2175 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
))
2177 reloc
= R_BFIN_FUNCDESC
;
2185 /* Otherwise, we know we have a private function descriptor,
2186 so reference it directly. */
2187 if (elf_hash_table (info
)->dynamic_sections_created
)
2188 BFD_ASSERT (entry
->privfd
);
2189 reloc
= R_BFIN_BYTE4_DATA
;
2190 idx
= elf_section_data (bfinfdpic_got_section (info
)
2191 ->output_section
)->dynindx
;
2192 ad
= bfinfdpic_got_section (info
)->output_offset
2193 + bfinfdpic_got_initial_offset (info
) + entry
->fd_entry
;
2196 /* If there is room for dynamic symbol resolution, emit the
2197 dynamic relocation. However, if we're linking an
2198 executable at a fixed location, we won't have emitted a
2199 dynamic symbol entry for the got section, so idx will be
2200 zero, which means we can and should compute the address
2201 of the private descriptor ourselves. */
2202 if (bfd_link_pde (info
)
2203 && (entry
->symndx
!= -1
2204 || BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)))
2206 ad
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2207 _bfinfdpic_add_rofixup (output_bfd
,
2208 bfinfdpic_gotfixup_section (info
),
2209 bfinfdpic_got_section (info
)
2210 ->output_section
->vma
2211 + bfinfdpic_got_section (info
)
2213 + bfinfdpic_got_initial_offset (info
)
2214 + entry
->fdgot_entry
, entry
);
2217 _bfinfdpic_add_dyn_reloc (output_bfd
,
2218 bfinfdpic_gotrel_section (info
),
2219 _bfd_elf_section_offset
2221 bfinfdpic_got_section (info
),
2222 bfinfdpic_got_initial_offset (info
)
2223 + entry
->fdgot_entry
)
2224 + bfinfdpic_got_section (info
)
2225 ->output_section
->vma
2226 + bfinfdpic_got_section (info
)
2228 reloc
, idx
, ad
, entry
);
2231 bfd_put_32 (output_bfd
, ad
,
2232 bfinfdpic_got_section (info
)->contents
2233 + bfinfdpic_got_initial_offset (info
)
2234 + entry
->fdgot_entry
);
2237 /* Generate relocation to fill in a private function descriptor in
2239 if (entry
->fd_entry
)
2242 bfd_vma ad
= addend
;
2244 long lowword
, highword
;
2246 /* If the symbol is dynamic but binds locally, use
2248 if (sec
&& (entry
->symndx
!= -1
2249 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2251 if (entry
->symndx
== -1)
2252 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2254 ad
+= sym
->st_value
;
2255 ad
+= sec
->output_offset
;
2256 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2257 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2262 /* If we're linking an executable at a fixed address, we can
2263 omit the dynamic relocation as long as the symbol is local to
2265 if (bfd_link_pde (info
)
2266 && (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2269 ad
+= sec
->output_section
->vma
;
2271 if (entry
->symndx
!= -1
2272 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2274 _bfinfdpic_add_rofixup (output_bfd
,
2275 bfinfdpic_gotfixup_section (info
),
2276 bfinfdpic_got_section (info
)
2277 ->output_section
->vma
2278 + bfinfdpic_got_section (info
)
2280 + bfinfdpic_got_initial_offset (info
)
2281 + entry
->fd_entry
, entry
);
2282 _bfinfdpic_add_rofixup (output_bfd
,
2283 bfinfdpic_gotfixup_section (info
),
2284 bfinfdpic_got_section (info
)
2285 ->output_section
->vma
2286 + bfinfdpic_got_section (info
)
2288 + bfinfdpic_got_initial_offset (info
)
2289 + entry
->fd_entry
+ 4, entry
);
2295 = _bfinfdpic_add_dyn_reloc (output_bfd
,
2297 ? bfinfdpic_pltrel_section (info
)
2298 : bfinfdpic_gotrel_section (info
),
2299 _bfd_elf_section_offset
2301 bfinfdpic_got_section (info
),
2302 bfinfdpic_got_initial_offset (info
)
2304 + bfinfdpic_got_section (info
)
2305 ->output_section
->vma
2306 + bfinfdpic_got_section (info
)
2308 R_BFIN_FUNCDESC_VALUE
, idx
, ad
, entry
);
2311 /* If we've omitted the dynamic relocation, just emit the fixed
2312 addresses of the symbol and of the local GOT base offset. */
2313 if (bfd_link_pde (info
)
2315 && sec
->output_section
)
2318 highword
= bfinfdpic_got_section (info
)->output_section
->vma
2319 + bfinfdpic_got_section (info
)->output_offset
2320 + bfinfdpic_got_initial_offset (info
);
2322 else if (entry
->lazyplt
)
2327 fd_lazy_rel_offset
= ofst
;
2329 /* A function descriptor used for lazy or local resolving is
2330 initialized such that its high word contains the output
2331 section index in which the PLT entries are located, and
2332 the low word contains the address of the lazy PLT entry
2333 entry point, that must be within the memory region
2334 assigned to that section. */
2335 lowword
= entry
->lzplt_entry
+ 4
2336 + bfinfdpic_plt_section (info
)->output_offset
2337 + bfinfdpic_plt_section (info
)->output_section
->vma
;
2338 highword
= _bfinfdpic_osec_to_segment
2339 (output_bfd
, bfinfdpic_plt_section (info
)->output_section
);
2343 /* A function descriptor for a local function gets the index
2344 of the section. For a non-local function, it's
2348 || (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1
2349 && entry
->d
.h
->dynindx
== idx
))
2352 highword
= _bfinfdpic_osec_to_segment
2353 (output_bfd
, sec
->output_section
);
2356 bfd_put_32 (output_bfd
, lowword
,
2357 bfinfdpic_got_section (info
)->contents
2358 + bfinfdpic_got_initial_offset (info
)
2360 bfd_put_32 (output_bfd
, highword
,
2361 bfinfdpic_got_section (info
)->contents
2362 + bfinfdpic_got_initial_offset (info
)
2363 + entry
->fd_entry
+ 4);
2366 /* Generate code for the PLT entry. */
2367 if (entry
->plt_entry
!= (bfd_vma
) -1)
2369 bfd_byte
*plt_code
= bfinfdpic_plt_section (info
)->contents
2372 BFD_ASSERT (entry
->fd_entry
);
2374 /* Figure out what kind of PLT entry we need, depending on the
2375 location of the function descriptor within the GOT. */
2376 if (entry
->fd_entry
>= -(1 << (18 - 1))
2377 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
2379 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2380 bfd_put_32 (output_bfd
,
2381 0xe519 | ((entry
->fd_entry
<< 14) & 0xFFFF0000),
2383 bfd_put_32 (output_bfd
,
2384 0xe51b | (((entry
->fd_entry
+ 4) << 14) & 0xFFFF0000),
2390 /* P1.L = fd_entry; P1.H = fd_entry;
2394 bfd_put_32 (output_bfd
,
2395 0xe109 | (entry
->fd_entry
<< 16),
2397 bfd_put_32 (output_bfd
,
2398 0xe149 | (entry
->fd_entry
& 0xFFFF0000),
2400 bfd_put_16 (output_bfd
, 0x5ad9, plt_code
+ 8);
2401 bfd_put_16 (output_bfd
, 0x9159, plt_code
+ 10);
2402 bfd_put_16 (output_bfd
, 0xac5b, plt_code
+ 12);
2406 bfd_put_16 (output_bfd
, 0x0051, plt_code
);
2409 /* Generate code for the lazy PLT entry. */
2410 if (entry
->lzplt_entry
!= (bfd_vma
) -1)
2412 bfd_byte
*lzplt_code
= bfinfdpic_plt_section (info
)->contents
2413 + entry
->lzplt_entry
;
2414 bfd_vma resolverStub_addr
;
2416 bfd_put_32 (output_bfd
, fd_lazy_rel_offset
, lzplt_code
);
2419 resolverStub_addr
= entry
->lzplt_entry
/ BFINFDPIC_LZPLT_BLOCK_SIZE
2420 * BFINFDPIC_LZPLT_BLOCK_SIZE
+ BFINFDPIC_LZPLT_RESOLV_LOC
;
2421 if (resolverStub_addr
>= bfinfdpic_plt_initial_offset (info
))
2422 resolverStub_addr
= bfinfdpic_plt_initial_offset (info
) - LZPLT_NORMAL_SIZE
- LZPLT_RESOLVER_EXTRA
;
2424 if (entry
->lzplt_entry
== resolverStub_addr
)
2426 /* This is a lazy PLT entry that includes a resolver call.
2430 bfd_put_32 (output_bfd
,
2433 bfd_put_16 (output_bfd
, 0x0052, lzplt_code
+ 4);
2437 /* JUMP.S resolverStub */
2438 bfd_put_16 (output_bfd
,
2440 | (((resolverStub_addr
- entry
->lzplt_entry
)
2441 / 2) & (((bfd_vma
)1 << 12) - 1)),
2449 /* Relocate an Blackfin ELF section.
2451 The RELOCATE_SECTION function is called by the new ELF backend linker
2452 to handle the relocations for a section.
2454 The relocs are always passed as Rela structures; if the section
2455 actually uses Rel structures, the r_addend field will always be
2458 This function is responsible for adjusting the section contents as
2459 necessary, and (if using Rela relocs and generating a relocatable
2460 output file) adjusting the reloc addend as necessary.
2462 This function does not have to worry about setting the reloc
2463 address or the reloc symbol index.
2465 LOCAL_SYMS is a pointer to the swapped in local symbols.
2467 LOCAL_SECTIONS is an array giving the section in the input file
2468 corresponding to the st_shndx field of each local symbol.
2470 The global hash table entry for the global symbols can be found
2471 via elf_sym_hashes (input_bfd).
2473 When generating relocatable output, this function must handle
2474 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2475 going to be the section symbol corresponding to the output
2476 section, which means that the addend must be adjusted
2480 bfinfdpic_relocate_section (bfd
* output_bfd
,
2481 struct bfd_link_info
*info
,
2483 asection
* input_section
,
2484 bfd_byte
* contents
,
2485 Elf_Internal_Rela
* relocs
,
2486 Elf_Internal_Sym
* local_syms
,
2487 asection
** local_sections
)
2489 Elf_Internal_Shdr
*symtab_hdr
;
2490 struct elf_link_hash_entry
**sym_hashes
;
2491 Elf_Internal_Rela
*rel
;
2492 Elf_Internal_Rela
*relend
;
2493 unsigned isec_segment
, got_segment
, plt_segment
,
2495 int silence_segment_error
= !bfd_link_pic (info
);
2497 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
2498 sym_hashes
= elf_sym_hashes (input_bfd
);
2499 relend
= relocs
+ input_section
->reloc_count
;
2501 isec_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2502 input_section
->output_section
);
2503 if (IS_FDPIC (output_bfd
) && bfinfdpic_got_section (info
))
2504 got_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2505 bfinfdpic_got_section (info
)
2509 if (IS_FDPIC (output_bfd
) && elf_hash_table (info
)->dynamic_sections_created
)
2510 plt_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2511 bfinfdpic_plt_section (info
)
2516 for (rel
= relocs
; rel
< relend
; rel
++)
2518 reloc_howto_type
*howto
;
2519 unsigned long r_symndx
;
2520 Elf_Internal_Sym
*sym
;
2522 struct elf_link_hash_entry
*h
;
2524 bfd_reloc_status_type r
;
2525 const char * name
= NULL
;
2528 struct bfinfdpic_relocs_info
*picrel
;
2529 bfd_vma orig_addend
= rel
->r_addend
;
2531 r_type
= ELF32_R_TYPE (rel
->r_info
);
2533 if (r_type
== R_BFIN_GNU_VTINHERIT
2534 || r_type
== R_BFIN_GNU_VTENTRY
)
2537 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2538 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2541 bfd_set_error (bfd_error_bad_value
);
2549 if (r_symndx
< symtab_hdr
->sh_info
)
2551 sym
= local_syms
+ r_symndx
;
2552 osec
= sec
= local_sections
[r_symndx
];
2553 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2555 name
= bfd_elf_string_from_elf_section
2556 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
2557 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
2561 bfd_boolean warned
, ignored
;
2562 bfd_boolean unresolved_reloc
;
2564 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2565 r_symndx
, symtab_hdr
, sym_hashes
,
2567 unresolved_reloc
, warned
, ignored
);
2571 if (sec
!= NULL
&& discarded_section (sec
))
2572 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2573 rel
, 1, relend
, howto
, 0, contents
);
2575 if (bfd_link_relocatable (info
))
2579 && (h
->root
.type
== bfd_link_hash_defined
2580 || h
->root
.type
== bfd_link_hash_defweak
)
2581 && !BFINFDPIC_SYM_LOCAL (info
, h
))
2589 case R_BFIN_PCREL24
:
2590 case R_BFIN_PCREL24_JUMP_L
:
2591 case R_BFIN_BYTE4_DATA
:
2592 if (! IS_FDPIC (output_bfd
))
2596 case R_BFIN_GOT17M4
:
2599 case R_BFIN_FUNCDESC_GOT17M4
:
2600 case R_BFIN_FUNCDESC_GOTHI
:
2601 case R_BFIN_FUNCDESC_GOTLO
:
2602 case R_BFIN_GOTOFF17M4
:
2603 case R_BFIN_GOTOFFHI
:
2604 case R_BFIN_GOTOFFLO
:
2605 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2606 case R_BFIN_FUNCDESC_GOTOFFHI
:
2607 case R_BFIN_FUNCDESC_GOTOFFLO
:
2608 case R_BFIN_FUNCDESC
:
2609 case R_BFIN_FUNCDESC_VALUE
:
2611 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2612 (info
), input_bfd
, h
,
2613 orig_addend
, INSERT
);
2615 /* In order to find the entry we created before, we must
2616 use the original addend, not the one that may have been
2617 modified by _bfd_elf_rela_local_sym(). */
2618 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2619 (info
), input_bfd
, r_symndx
,
2620 orig_addend
, INSERT
);
2624 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel
, output_bfd
, info
,
2629 /* xgettext:c-format */
2630 (_("%pB: relocation at `%pA+%#" PRIx64
"' "
2631 "references symbol `%s' with nonzero addend"),
2632 input_bfd
, input_section
, (uint64_t) rel
->r_offset
, name
);
2642 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2643 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2644 rel
->r_offset
) != (bfd_vma
) -1)
2646 info
->callbacks
->warning
2647 (info
, _("relocation references symbol not defined in the module"),
2648 name
, input_bfd
, input_section
, rel
->r_offset
);
2656 case R_BFIN_PCREL24
:
2657 case R_BFIN_PCREL24_JUMP_L
:
2658 check_segment
[0] = isec_segment
;
2659 if (! IS_FDPIC (output_bfd
))
2660 check_segment
[1] = isec_segment
;
2661 else if (picrel
->plt
)
2663 relocation
= bfinfdpic_plt_section (info
)->output_section
->vma
2664 + bfinfdpic_plt_section (info
)->output_offset
2665 + picrel
->plt_entry
;
2666 check_segment
[1] = plt_segment
;
2668 /* We don't want to warn on calls to undefined weak symbols,
2669 as calls to them must be protected by non-NULL tests
2670 anyway, and unprotected calls would invoke undefined
2672 else if (picrel
->symndx
== -1
2673 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefweak
)
2674 check_segment
[1] = check_segment
[0];
2676 check_segment
[1] = sec
2677 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2681 case R_BFIN_GOT17M4
:
2684 relocation
= picrel
->got_entry
;
2685 check_segment
[0] = check_segment
[1] = got_segment
;
2688 case R_BFIN_FUNCDESC_GOT17M4
:
2689 case R_BFIN_FUNCDESC_GOTHI
:
2690 case R_BFIN_FUNCDESC_GOTLO
:
2691 relocation
= picrel
->fdgot_entry
;
2692 check_segment
[0] = check_segment
[1] = got_segment
;
2695 case R_BFIN_GOTOFFHI
:
2696 case R_BFIN_GOTOFF17M4
:
2697 case R_BFIN_GOTOFFLO
:
2698 relocation
-= bfinfdpic_got_section (info
)->output_section
->vma
2699 + bfinfdpic_got_section (info
)->output_offset
2700 + bfinfdpic_got_initial_offset (info
);
2701 check_segment
[0] = got_segment
;
2702 check_segment
[1] = sec
2703 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2707 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2708 case R_BFIN_FUNCDESC_GOTOFFHI
:
2709 case R_BFIN_FUNCDESC_GOTOFFLO
:
2710 relocation
= picrel
->fd_entry
;
2711 check_segment
[0] = check_segment
[1] = got_segment
;
2714 case R_BFIN_FUNCDESC
:
2717 bfd_vma addend
= rel
->r_addend
;
2719 if (! (h
&& h
->root
.type
== bfd_link_hash_undefweak
2720 && BFINFDPIC_SYM_LOCAL (info
, h
)))
2722 /* If the symbol is dynamic and there may be dynamic
2723 symbol resolution because we are or are linked with a
2724 shared library, emit a FUNCDESC relocation such that
2725 the dynamic linker will allocate the function
2726 descriptor. If the symbol needs a non-local function
2727 descriptor but binds locally (e.g., its visibility is
2728 protected, emit a dynamic relocation decayed to
2730 if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
)
2731 && BFINFDPIC_SYM_LOCAL (info
, h
)
2732 && !bfd_link_pde (info
))
2734 dynindx
= elf_section_data (h
->root
.u
.def
.section
2735 ->output_section
)->dynindx
;
2736 addend
+= h
->root
.u
.def
.section
->output_offset
2737 + h
->root
.u
.def
.value
;
2739 else if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
))
2743 info
->callbacks
->warning
2744 (info
, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2745 name
, input_bfd
, input_section
, rel
->r_offset
);
2748 dynindx
= h
->dynindx
;
2752 /* Otherwise, we know we have a private function
2753 descriptor, so reference it directly. */
2754 BFD_ASSERT (picrel
->privfd
);
2755 r_type
= R_BFIN_BYTE4_DATA
;
2756 dynindx
= elf_section_data (bfinfdpic_got_section (info
)
2757 ->output_section
)->dynindx
;
2758 addend
= bfinfdpic_got_section (info
)->output_offset
2759 + bfinfdpic_got_initial_offset (info
)
2763 /* If there is room for dynamic symbol resolution, emit
2764 the dynamic relocation. However, if we're linking an
2765 executable at a fixed location, we won't have emitted a
2766 dynamic symbol entry for the got section, so idx will
2767 be zero, which means we can and should compute the
2768 address of the private descriptor ourselves. */
2769 if (bfd_link_pde (info
)
2770 && (!h
|| BFINFDPIC_FUNCDESC_LOCAL (info
, h
)))
2774 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2775 if ((bfd_get_section_flags (output_bfd
,
2776 input_section
->output_section
)
2777 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2779 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2783 info
->callbacks
->warning
2785 _("cannot emit fixups in read-only section"),
2786 name
, input_bfd
, input_section
, rel
->r_offset
);
2790 offset
= _bfd_elf_section_offset
2792 input_section
, rel
->r_offset
);
2794 if (offset
!= (bfd_vma
)-1)
2795 _bfinfdpic_add_rofixup (output_bfd
,
2796 bfinfdpic_gotfixup_section
2798 offset
+ input_section
2799 ->output_section
->vma
2800 + input_section
->output_offset
,
2804 else if ((bfd_get_section_flags (output_bfd
,
2805 input_section
->output_section
)
2806 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2810 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2814 info
->callbacks
->warning
2816 _("cannot emit dynamic relocations in read-only section"),
2817 name
, input_bfd
, input_section
, rel
->r_offset
);
2820 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2821 input_section
, rel
->r_offset
);
2823 if (offset
!= (bfd_vma
)-1)
2824 _bfinfdpic_add_dyn_reloc (output_bfd
,
2825 bfinfdpic_gotrel_section (info
),
2826 offset
+ input_section
2827 ->output_section
->vma
2828 + input_section
->output_offset
,
2830 dynindx
, addend
, picrel
);
2833 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2836 /* We want the addend in-place because dynamic
2837 relocations are REL. Setting relocation to it should
2838 arrange for it to be installed. */
2839 relocation
= addend
- rel
->r_addend
;
2841 check_segment
[0] = check_segment
[1] = got_segment
;
2844 case R_BFIN_BYTE4_DATA
:
2845 if (! IS_FDPIC (output_bfd
))
2847 check_segment
[0] = check_segment
[1] = -1;
2851 case R_BFIN_FUNCDESC_VALUE
:
2854 bfd_vma addend
= rel
->r_addend
;
2856 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2857 input_section
, rel
->r_offset
);
2859 /* If the symbol is dynamic but binds locally, use
2861 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2863 if (addend
&& r_type
== R_BFIN_FUNCDESC_VALUE
)
2865 info
->callbacks
->warning
2866 (info
, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2867 name
, input_bfd
, input_section
, rel
->r_offset
);
2870 dynindx
= h
->dynindx
;
2875 addend
+= h
->root
.u
.def
.value
;
2877 addend
+= sym
->st_value
;
2879 addend
+= osec
->output_offset
;
2880 if (osec
&& osec
->output_section
2881 && ! bfd_is_abs_section (osec
->output_section
)
2882 && ! bfd_is_und_section (osec
->output_section
))
2883 dynindx
= elf_section_data (osec
->output_section
)->dynindx
;
2888 /* If we're linking an executable at a fixed address, we
2889 can omit the dynamic relocation as long as the symbol
2890 is defined in the current link unit (which is implied
2891 by its output section not being NULL). */
2892 if (bfd_link_pde (info
)
2893 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2896 addend
+= osec
->output_section
->vma
;
2897 if (IS_FDPIC (input_bfd
)
2898 && (bfd_get_section_flags (output_bfd
,
2899 input_section
->output_section
)
2900 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2902 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2906 info
->callbacks
->warning
2908 _("cannot emit fixups in read-only section"),
2909 name
, input_bfd
, input_section
, rel
->r_offset
);
2912 if (!h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2914 if (offset
!= (bfd_vma
)-1)
2916 _bfinfdpic_add_rofixup (output_bfd
,
2917 bfinfdpic_gotfixup_section
2919 offset
+ input_section
2920 ->output_section
->vma
2921 + input_section
->output_offset
,
2924 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2925 _bfinfdpic_add_rofixup
2927 bfinfdpic_gotfixup_section (info
),
2928 offset
+ input_section
->output_section
->vma
2929 + input_section
->output_offset
+ 4, picrel
);
2936 if ((bfd_get_section_flags (output_bfd
,
2937 input_section
->output_section
)
2938 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2940 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2944 info
->callbacks
->warning
2946 _("cannot emit dynamic relocations in read-only section"),
2947 name
, input_bfd
, input_section
, rel
->r_offset
);
2951 if (offset
!= (bfd_vma
)-1)
2952 _bfinfdpic_add_dyn_reloc (output_bfd
,
2953 bfinfdpic_gotrel_section (info
),
2955 + input_section
->output_section
->vma
2956 + input_section
->output_offset
,
2957 r_type
, dynindx
, addend
, picrel
);
2960 addend
+= osec
->output_section
->vma
;
2961 /* We want the addend in-place because dynamic
2962 relocations are REL. Setting relocation to it
2963 should arrange for it to be installed. */
2964 relocation
= addend
- rel
->r_addend
;
2967 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2969 /* If we've omitted the dynamic relocation, just emit
2970 the fixed addresses of the symbol and of the local
2972 if (bfd_link_pde (info
)
2973 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2974 bfd_put_32 (output_bfd
,
2975 bfinfdpic_got_section (info
)->output_section
->vma
2976 + bfinfdpic_got_section (info
)->output_offset
2977 + bfinfdpic_got_initial_offset (info
),
2978 contents
+ rel
->r_offset
+ 4);
2980 /* A function descriptor used for lazy or local
2981 resolving is initialized such that its high word
2982 contains the output section index in which the
2983 PLT entries are located, and the low word
2984 contains the offset of the lazy PLT entry entry
2985 point into that section. */
2986 bfd_put_32 (output_bfd
,
2987 h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2989 : _bfinfdpic_osec_to_segment (output_bfd
,
2992 contents
+ rel
->r_offset
+ 4);
2995 check_segment
[0] = check_segment
[1] = got_segment
;
2999 check_segment
[0] = isec_segment
;
3000 check_segment
[1] = sec
3001 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
3006 if (check_segment
[0] != check_segment
[1] && IS_FDPIC (output_bfd
))
3008 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3009 in the ld testsuite. */
3010 /* This helps catch problems in GCC while we can't do more
3011 than static linking. The idea is to test whether the
3012 input file basename is crt0.o only once. */
3013 if (silence_segment_error
== 1)
3014 silence_segment_error
=
3015 (strlen (input_bfd
->filename
) == 6
3016 && filename_cmp (input_bfd
->filename
, "crt0.o") == 0)
3017 || (strlen (input_bfd
->filename
) > 6
3018 && filename_cmp (input_bfd
->filename
3019 + strlen (input_bfd
->filename
) - 7,
3023 if (!silence_segment_error
3024 /* We don't want duplicate errors for undefined
3026 && !(picrel
&& picrel
->symndx
== -1
3027 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefined
))
3028 info
->callbacks
->warning
3031 ? _("relocations between different segments are not supported")
3032 : _("warning: relocation references a different segment"),
3033 name
, input_bfd
, input_section
, rel
->r_offset
);
3034 if (!silence_segment_error
&& bfd_link_pic (info
))
3036 elf_elfheader (output_bfd
)->e_flags
|= EF_BFIN_PIC
;
3041 case R_BFIN_GOTOFFHI
:
3042 /* We need the addend to be applied before we shift the
3044 relocation
+= rel
->r_addend
;
3047 case R_BFIN_FUNCDESC_GOTHI
:
3048 case R_BFIN_FUNCDESC_GOTOFFHI
:
3053 case R_BFIN_FUNCDESC_GOTLO
:
3054 case R_BFIN_GOTOFFLO
:
3055 case R_BFIN_FUNCDESC_GOTOFFLO
:
3056 relocation
&= 0xffff;
3065 case R_BFIN_PCREL24
:
3066 case R_BFIN_PCREL24_JUMP_L
:
3067 if (! IS_FDPIC (output_bfd
) || ! picrel
->plt
)
3071 /* When referencing a GOT entry, a function descriptor or a
3072 PLT, we don't want the addend to apply to the reference,
3073 but rather to the referenced symbol. The actual entry
3074 will have already been created taking the addend into
3075 account, so cancel it out here. */
3076 case R_BFIN_GOT17M4
:
3079 case R_BFIN_FUNCDESC_GOT17M4
:
3080 case R_BFIN_FUNCDESC_GOTHI
:
3081 case R_BFIN_FUNCDESC_GOTLO
:
3082 case R_BFIN_FUNCDESC_GOTOFF17M4
:
3083 case R_BFIN_FUNCDESC_GOTOFFHI
:
3084 case R_BFIN_FUNCDESC_GOTOFFLO
:
3085 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3086 here, since we do want to apply the addend to the others.
3087 Note that we've applied the addend to GOTOFFHI before we
3088 shifted it right. */
3089 case R_BFIN_GOTOFFHI
:
3090 relocation
-= rel
->r_addend
;
3097 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
3098 contents
, rel
->r_offset
,
3099 relocation
, rel
->r_addend
);
3101 if (r
!= bfd_reloc_ok
)
3103 const char * msg
= (const char *) NULL
;
3107 case bfd_reloc_overflow
:
3108 (*info
->callbacks
->reloc_overflow
)
3109 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3110 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3113 case bfd_reloc_undefined
:
3114 (*info
->callbacks
->undefined_symbol
)
3115 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
3118 case bfd_reloc_outofrange
:
3119 msg
= _("internal error: out of range error");
3122 case bfd_reloc_notsupported
:
3123 msg
= _("internal error: unsupported relocation error");
3126 case bfd_reloc_dangerous
:
3127 msg
= _("internal error: dangerous relocation");
3131 msg
= _("internal error: unknown error");
3136 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
3137 input_section
, rel
->r_offset
);
3144 /* We need dynamic symbols for every section, since segments can
3145 relocate independently. */
3147 _bfinfdpic_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3148 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3151 switch (elf_section_data (p
)->this_hdr
.sh_type
)
3155 /* If sh_type is yet undecided, assume it could be
3156 SHT_PROGBITS/SHT_NOBITS. */
3160 /* There shouldn't be section relative relocations
3161 against any other section. */
3167 /* Create a .got section, as well as its additional info field. This
3168 is almost entirely copied from
3169 elflink.c:_bfd_elf_create_got_section(). */
3172 _bfin_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
3174 flagword flags
, pltflags
;
3176 struct elf_link_hash_entry
*h
;
3177 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3180 /* This function may be called more than once. */
3181 s
= elf_hash_table (info
)->sgot
;
3185 /* Machine specific: although pointers are 32-bits wide, we want the
3186 GOT to be aligned to a 64-bit boundary, such that function
3187 descriptors in it can be accessed with 64-bit loads and
3191 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3192 | SEC_LINKER_CREATED
);
3195 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
3196 elf_hash_table (info
)->sgot
= s
;
3198 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3201 if (bed
->want_got_sym
)
3203 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3204 (or .got.plt) section. We don't do this in the linker script
3205 because we don't want to define the symbol if we are not creating
3206 a global offset table. */
3207 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "__GLOBAL_OFFSET_TABLE_");
3208 elf_hash_table (info
)->hgot
= h
;
3212 /* Machine-specific: we want the symbol for executables as
3214 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3218 /* The first bit of the global offset table is the header. */
3219 s
->size
+= bed
->got_header_size
;
3221 /* This is the machine-specific part. Create and initialize section
3222 data for the got. */
3223 if (IS_FDPIC (abfd
))
3225 bfinfdpic_relocs_info (info
) = htab_try_create (1,
3226 bfinfdpic_relocs_info_hash
,
3227 bfinfdpic_relocs_info_eq
,
3229 if (! bfinfdpic_relocs_info (info
))
3232 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.got",
3233 (flags
| SEC_READONLY
));
3235 || ! bfd_set_section_alignment (abfd
, s
, 2))
3238 bfinfdpic_gotrel_section (info
) = s
;
3240 /* Machine-specific. */
3241 s
= bfd_make_section_anyway_with_flags (abfd
, ".rofixup",
3242 (flags
| SEC_READONLY
));
3244 || ! bfd_set_section_alignment (abfd
, s
, 2))
3247 bfinfdpic_gotfixup_section (info
) = s
;
3250 pltflags
|= SEC_CODE
;
3251 if (bed
->plt_not_loaded
)
3252 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
3253 if (bed
->plt_readonly
)
3254 pltflags
|= SEC_READONLY
;
3256 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
3258 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
3260 /* Blackfin-specific: remember it. */
3261 bfinfdpic_plt_section (info
) = s
;
3263 if (bed
->want_plt_sym
)
3265 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3267 struct bfd_link_hash_entry
*bh
= NULL
;
3269 if (! (_bfd_generic_link_add_one_symbol
3270 (info
, abfd
, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
, 0, NULL
,
3271 FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
3273 h
= (struct elf_link_hash_entry
*) bh
;
3275 h
->type
= STT_OBJECT
;
3277 if (! bfd_link_executable (info
)
3278 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3282 /* Blackfin-specific: we want rel relocations for the plt. */
3283 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.plt",
3284 flags
| SEC_READONLY
);
3286 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3288 /* Blackfin-specific: remember it. */
3289 bfinfdpic_pltrel_section (info
) = s
;
3294 /* Make sure the got and plt sections exist, and that our pointers in
3295 the link hash table point to them. */
3298 elf32_bfinfdpic_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3300 /* This is mostly copied from
3301 elflink.c:_bfd_elf_create_dynamic_sections(). */
3304 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3306 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3307 | SEC_LINKER_CREATED
);
3309 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3310 .rel[a].bss sections. */
3312 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3313 if (! _bfin_create_got_section (abfd
, info
))
3316 /* Blackfin-specific: make sure we created everything we wanted. */
3317 BFD_ASSERT (bfinfdpic_got_section (info
) && bfinfdpic_gotrel_section (info
)
3318 /* && bfinfdpic_gotfixup_section (info) */
3319 && bfinfdpic_plt_section (info
)
3320 && bfinfdpic_pltrel_section (info
));
3322 if (bed
->want_dynbss
)
3324 /* The .dynbss section is a place to put symbols which are defined
3325 by dynamic objects, are referenced by regular objects, and are
3326 not functions. We must allocate space for them in the process
3327 image and use a R_*_COPY reloc to tell the dynamic linker to
3328 initialize them at run time. The linker script puts the .dynbss
3329 section into the .bss section of the final image. */
3330 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
3331 SEC_ALLOC
| SEC_LINKER_CREATED
);
3335 /* The .rel[a].bss section holds copy relocs. This section is not
3336 normally needed. We need to create it here, though, so that the
3337 linker will map it to an output section. We can't just create it
3338 only if we need it, because we will not know whether we need it
3339 until we have seen all the input files, and the first time the
3340 main linker code calls BFD after examining all the input files
3341 (size_dynamic_sections) the input sections have already been
3342 mapped to the output sections. If the section turns out not to
3343 be needed, we can discard it later. We will never need this
3344 section when generating a shared object, since they do not use
3346 if (! bfd_link_pic (info
))
3348 s
= bfd_make_section_anyway_with_flags (abfd
,
3350 flags
| SEC_READONLY
);
3352 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3360 /* Compute the total GOT size required by each symbol in each range.
3361 Symbols may require up to 4 words in the GOT: an entry pointing to
3362 the symbol, an entry pointing to its function descriptor, and a
3363 private function descriptors taking two words. */
3366 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info
*entry
,
3367 struct _bfinfdpic_dynamic_got_info
*dinfo
)
3369 /* Allocate space for a GOT entry pointing to the symbol. */
3371 dinfo
->got17m4
+= 4;
3372 else if (entry
->gothilo
)
3373 dinfo
->gothilo
+= 4;
3378 /* Allocate space for a GOT entry pointing to the function
3380 if (entry
->fdgot17m4
)
3381 dinfo
->got17m4
+= 4;
3382 else if (entry
->fdgothilo
)
3383 dinfo
->gothilo
+= 4;
3388 /* Decide whether we need a PLT entry, a function descriptor in the
3389 GOT, and a lazy PLT entry for this symbol. */
3390 entry
->plt
= entry
->call
3391 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3392 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3393 entry
->privfd
= entry
->plt
3394 || entry
->fdgoff17m4
|| entry
->fdgoffhilo
3395 || ((entry
->fd
|| entry
->fdgot17m4
|| entry
->fdgothilo
)
3396 && (entry
->symndx
!= -1
3397 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
)));
3398 entry
->lazyplt
= entry
->privfd
3399 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3400 && ! (dinfo
->info
->flags
& DF_BIND_NOW
)
3401 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3403 /* Allocate space for a function descriptor. */
3404 if (entry
->fdgoff17m4
)
3406 else if (entry
->privfd
&& entry
->plt
)
3408 else if (entry
->privfd
)
3415 dinfo
->lzplt
+= LZPLT_NORMAL_SIZE
;
3418 /* Compute the number of dynamic relocations and fixups that a symbol
3419 requires, and add (or subtract) from the grand and per-symbol
3423 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info
*entry
,
3424 struct _bfinfdpic_dynamic_got_info
*dinfo
,
3425 bfd_boolean subtract
)
3427 bfd_vma relocs
= 0, fixups
= 0;
3429 if (!bfd_link_pde (dinfo
->info
))
3430 relocs
= entry
->relocs32
+ entry
->relocsfd
+ entry
->relocsfdv
;
3433 if (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
))
3435 if (entry
->symndx
!= -1
3436 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3437 fixups
+= entry
->relocs32
+ 2 * entry
->relocsfdv
;
3440 relocs
+= entry
->relocs32
+ entry
->relocsfdv
;
3442 if (entry
->symndx
!= -1
3443 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
))
3445 if (entry
->symndx
!= -1
3446 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3447 fixups
+= entry
->relocsfd
;
3450 relocs
+= entry
->relocsfd
;
3459 entry
->dynrelocs
+= relocs
;
3460 entry
->fixups
+= fixups
;
3461 dinfo
->relocs
+= relocs
;
3462 dinfo
->fixups
+= fixups
;
3465 /* Compute the total GOT and PLT size required by each symbol in each range. *
3466 Symbols may require up to 4 words in the GOT: an entry pointing to
3467 the symbol, an entry pointing to its function descriptor, and a
3468 private function descriptors taking two words. */
3471 _bfinfdpic_count_got_plt_entries (void **entryp
, void *dinfo_
)
3473 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3474 struct _bfinfdpic_dynamic_got_info
*dinfo
= dinfo_
;
3476 _bfinfdpic_count_nontls_entries (entry
, dinfo
);
3478 _bfinfdpic_count_relocs_fixups (entry
, dinfo
, FALSE
);
3483 /* This structure is used to assign offsets to got entries, function
3484 descriptors, plt entries and lazy plt entries. */
3486 struct _bfinfdpic_dynamic_got_plt_info
3488 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3489 struct _bfinfdpic_dynamic_got_info g
;
3491 /* For each addressable range, we record a MAX (positive) and MIN
3492 (negative) value. CUR is used to assign got entries, and it's
3493 incremented from an initial positive value to MAX, then from MIN
3494 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3495 assign function descriptors, and it's decreased from an initial
3496 non-positive value to MIN, then from MAX down to CUR (unless CUR
3497 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3498 to even words. ODD, if non-zero, indicates an odd word to be
3499 used for the next got entry, otherwise CUR is used and
3500 incremented by a pair of words, wrapping around when it reaches
3501 MAX. FDCUR is decremented (and wrapped) before the next function
3502 descriptor is chosen. FDPLT indicates the number of remaining
3503 slots that can be used for function descriptors used only by PLT
3505 struct _bfinfdpic_dynamic_got_alloc_data
3507 bfd_signed_vma max
, cur
, odd
, fdcur
, min
;
3512 /* Determine the positive and negative ranges to be used by each
3513 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3514 double-word boundary, are the minimum (negative) and maximum
3515 (positive) GOT offsets already used by previous ranges, except for
3516 an ODD entry that may have been left behind. GOT and FD indicate
3517 the size of GOT entries and function descriptors that must be
3518 placed within the range from -WRAP to WRAP. If there's room left,
3519 up to FDPLT bytes should be reserved for additional function
3522 inline static bfd_signed_vma
3523 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data
*gad
,
3524 bfd_signed_vma fdcur
,
3532 bfd_signed_vma wrapmin
= -wrap
;
3534 /* Start at the given initial points. */
3538 /* If we had an incoming odd word and we have any got entries that
3539 are going to use it, consume it, otherwise leave gad->odd at
3540 zero. We might force gad->odd to zero and return the incoming
3541 odd such that it is used by the next range, but then GOT entries
3542 might appear to be out of order and we wouldn't be able to
3543 shorten the GOT by one word if it turns out to end with an
3544 unpaired GOT entry. */
3554 /* If we're left with an unpaired GOT entry, compute its location
3555 such that we can return it. Otherwise, if got doesn't require an
3556 odd number of words here, either odd was already zero in the
3557 block above, or it was set to zero because got was non-zero, or
3558 got was already zero. In the latter case, we want the value of
3559 odd to carry over to the return statement, so we don't want to
3560 reset odd unless the condition below is true. */
3567 /* Compute the tentative boundaries of this range. */
3568 gad
->max
= cur
+ got
;
3569 gad
->min
= fdcur
- fd
;
3572 /* If function descriptors took too much space, wrap some of them
3574 if (gad
->min
< wrapmin
)
3576 gad
->max
+= wrapmin
- gad
->min
;
3579 /* If there is space left and we have function descriptors
3580 referenced in PLT entries that could take advantage of shorter
3581 offsets, place them here. */
3582 else if (fdplt
&& gad
->min
> wrapmin
)
3585 if ((bfd_vma
) (gad
->min
- wrapmin
) < fdplt
)
3586 fds
= gad
->min
- wrapmin
;
3595 /* If GOT entries took too much space, wrap some of them around.
3596 This may well cause gad->min to become lower than wrapmin. This
3597 will cause a relocation overflow later on, so we don't have to
3599 if ((bfd_vma
) gad
->max
> wrap
)
3601 gad
->min
-= gad
->max
- wrap
;
3604 /* If there is more space left, try to place some more function
3605 descriptors for PLT entries. */
3606 else if (fdplt
&& (bfd_vma
) gad
->max
< wrap
)
3609 if ((bfd_vma
) (wrap
- gad
->max
) < fdplt
)
3610 fds
= wrap
- gad
->max
;
3619 /* If odd was initially computed as an offset past the wrap point,
3622 odd
= gad
->min
+ odd
- gad
->max
;
3624 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3625 before returning, so do it here too. This guarantees that,
3626 should cur and fdcur meet at the wrap point, they'll both be
3628 if (gad
->cur
== gad
->max
)
3629 gad
->cur
= gad
->min
;
3634 /* Compute the location of the next GOT entry, given the allocation
3635 data for a range. */
3637 inline static bfd_signed_vma
3638 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3644 /* If there was an odd word left behind, use it. */
3650 /* Otherwise, use the word pointed to by cur, reserve the next
3651 as an odd word, and skip to the next pair of words, possibly
3654 gad
->odd
= gad
->cur
+ 4;
3656 if (gad
->cur
== gad
->max
)
3657 gad
->cur
= gad
->min
;
3663 /* Compute the location of the next function descriptor entry in the
3664 GOT, given the allocation data for a range. */
3666 inline static bfd_signed_vma
3667 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3669 /* If we're at the bottom, wrap around, and only then allocate the
3670 next pair of words. */
3671 if (gad
->fdcur
== gad
->min
)
3672 gad
->fdcur
= gad
->max
;
3673 return gad
->fdcur
-= 8;
3676 /* Assign GOT offsets for every GOT entry and function descriptor.
3677 Doing everything in a single pass is tricky. */
3680 _bfinfdpic_assign_got_entries (void **entryp
, void *info_
)
3682 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3683 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3686 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3687 else if (entry
->gothilo
)
3688 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3690 if (entry
->fdgot17m4
)
3691 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3692 else if (entry
->fdgothilo
)
3693 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3695 if (entry
->fdgoff17m4
)
3696 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3697 else if (entry
->plt
&& dinfo
->got17m4
.fdplt
)
3699 dinfo
->got17m4
.fdplt
-= 8;
3700 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3702 else if (entry
->plt
)
3704 dinfo
->gothilo
.fdplt
-= 8;
3705 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3707 else if (entry
->privfd
)
3708 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3713 /* Assign GOT offsets to private function descriptors used by PLT
3714 entries (or referenced by 32-bit offsets), as well as PLT entries
3715 and lazy PLT entries. */
3718 _bfinfdpic_assign_plt_entries (void **entryp
, void *info_
)
3720 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3721 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3723 /* If this symbol requires a local function descriptor, allocate
3725 if (entry
->privfd
&& entry
->fd_entry
== 0)
3727 if (dinfo
->got17m4
.fdplt
)
3729 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3730 dinfo
->got17m4
.fdplt
-= 8;
3734 BFD_ASSERT (dinfo
->gothilo
.fdplt
);
3735 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3736 dinfo
->gothilo
.fdplt
-= 8;
3744 /* We use the section's raw size to mark the location of the
3746 entry
->plt_entry
= bfinfdpic_plt_section (dinfo
->g
.info
)->size
;
3748 /* Figure out the length of this PLT entry based on the
3749 addressing mode we need to reach the function descriptor. */
3750 BFD_ASSERT (entry
->fd_entry
);
3751 if (entry
->fd_entry
>= -(1 << (18 - 1))
3752 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
3757 bfinfdpic_plt_section (dinfo
->g
.info
)->size
+= size
;
3762 entry
->lzplt_entry
= dinfo
->g
.lzplt
;
3763 dinfo
->g
.lzplt
+= LZPLT_NORMAL_SIZE
;
3764 /* If this entry is the one that gets the resolver stub, account
3765 for the additional instruction. */
3766 if (entry
->lzplt_entry
% BFINFDPIC_LZPLT_BLOCK_SIZE
3767 == BFINFDPIC_LZPLT_RESOLV_LOC
)
3768 dinfo
->g
.lzplt
+= LZPLT_RESOLVER_EXTRA
;
3774 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3775 _bfinfdpic_assign_plt_entries. */
3778 _bfinfdpic_reset_got_plt_entries (void **entryp
, void *ignore ATTRIBUTE_UNUSED
)
3780 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3782 entry
->got_entry
= 0;
3783 entry
->fdgot_entry
= 0;
3784 entry
->fd_entry
= 0;
3785 entry
->plt_entry
= (bfd_vma
)-1;
3786 entry
->lzplt_entry
= (bfd_vma
)-1;
3791 /* Follow indirect and warning hash entries so that each got entry
3792 points to the final symbol definition. P must point to a pointer
3793 to the hash table we're traversing. Since this traversal may
3794 modify the hash table, we set this pointer to NULL to indicate
3795 we've made a potentially-destructive change to the hash table, so
3796 the traversal must be restarted. */
3798 _bfinfdpic_resolve_final_relocs_info (void **entryp
, void *p
)
3800 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3803 if (entry
->symndx
== -1)
3805 struct elf_link_hash_entry
*h
= entry
->d
.h
;
3806 struct bfinfdpic_relocs_info
*oentry
;
3808 while (h
->root
.type
== bfd_link_hash_indirect
3809 || h
->root
.type
== bfd_link_hash_warning
)
3810 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
3812 if (entry
->d
.h
== h
)
3815 oentry
= bfinfdpic_relocs_info_for_global (*htab
, 0, h
, entry
->addend
,
3820 /* Merge the two entries. */
3821 bfinfdpic_pic_merge_early_relocs_info (oentry
, entry
);
3822 htab_clear_slot (*htab
, entryp
);
3828 /* If we can't find this entry with the new bfd hash, re-insert
3829 it, and get the traversal restarted. */
3830 if (! htab_find (*htab
, entry
))
3832 htab_clear_slot (*htab
, entryp
);
3833 entryp
= htab_find_slot (*htab
, entry
, INSERT
);
3836 /* Abort the traversal, since the whole table may have
3837 moved, and leave it up to the parent to restart the
3839 *(htab_t
*)p
= NULL
;
3847 /* Compute the total size of the GOT, the PLT, the dynamic relocations
3848 section and the rofixup section. Assign locations for GOT and PLT
3852 _bfinfdpic_size_got_plt (bfd
*output_bfd
,
3853 struct _bfinfdpic_dynamic_got_plt_info
*gpinfop
)
3857 struct bfd_link_info
*info
= gpinfop
->g
.info
;
3858 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
3860 memcpy (bfinfdpic_dynamic_got_plt_info (info
), &gpinfop
->g
,
3861 sizeof (gpinfop
->g
));
3864 /* Compute the total size taken by entries in the 18-bit range,
3865 to tell how many PLT function descriptors we can bring into it
3866 without causing it to overflow. */
3867 limit
= odd
+ gpinfop
->g
.got17m4
+ gpinfop
->g
.fd17m4
;
3868 if (limit
< (bfd_vma
)1 << 18)
3869 limit
= ((bfd_vma
)1 << 18) - limit
;
3872 if (gpinfop
->g
.fdplt
< limit
)
3873 limit
= gpinfop
->g
.fdplt
;
3875 /* Determine the ranges of GOT offsets that we can use for each
3876 range of addressing modes. */
3877 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->got17m4
,
3884 (bfd_vma
)1 << (18-1));
3885 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->gothilo
,
3886 gpinfop
->got17m4
.min
,
3888 gpinfop
->got17m4
.max
,
3891 gpinfop
->g
.fdplt
- gpinfop
->got17m4
.fdplt
,
3892 (bfd_vma
)1 << (32-1));
3894 /* Now assign (most) GOT offsets. */
3895 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_got_entries
,
3898 bfinfdpic_got_section (info
)->size
= gpinfop
->gothilo
.max
3899 - gpinfop
->gothilo
.min
3900 /* If an odd word is the last word of the GOT, we don't need this
3901 word to be part of the GOT. */
3902 - (odd
+ 4 == gpinfop
->gothilo
.max
? 4 : 0);
3903 if (bfinfdpic_got_section (info
)->size
== 0)
3904 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3905 else if (bfinfdpic_got_section (info
)->size
== 12
3906 && ! elf_hash_table (info
)->dynamic_sections_created
)
3908 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3909 bfinfdpic_got_section (info
)->size
= 0;
3913 bfinfdpic_got_section (info
)->contents
=
3914 (bfd_byte
*) bfd_zalloc (dynobj
,
3915 bfinfdpic_got_section (info
)->size
);
3916 if (bfinfdpic_got_section (info
)->contents
== NULL
)
3920 if (elf_hash_table (info
)->dynamic_sections_created
)
3921 /* Subtract the number of lzplt entries, since those will generate
3922 relocations in the pltrel section. */
3923 bfinfdpic_gotrel_section (info
)->size
=
3924 (gpinfop
->g
.relocs
- gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
)
3925 * get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3927 BFD_ASSERT (gpinfop
->g
.relocs
== 0);
3928 if (bfinfdpic_gotrel_section (info
)->size
== 0)
3929 bfinfdpic_gotrel_section (info
)->flags
|= SEC_EXCLUDE
;
3932 bfinfdpic_gotrel_section (info
)->contents
=
3933 (bfd_byte
*) bfd_zalloc (dynobj
,
3934 bfinfdpic_gotrel_section (info
)->size
);
3935 if (bfinfdpic_gotrel_section (info
)->contents
== NULL
)
3939 bfinfdpic_gotfixup_section (info
)->size
= (gpinfop
->g
.fixups
+ 1) * 4;
3940 if (bfinfdpic_gotfixup_section (info
)->size
== 0)
3941 bfinfdpic_gotfixup_section (info
)->flags
|= SEC_EXCLUDE
;
3944 bfinfdpic_gotfixup_section (info
)->contents
=
3945 (bfd_byte
*) bfd_zalloc (dynobj
,
3946 bfinfdpic_gotfixup_section (info
)->size
);
3947 if (bfinfdpic_gotfixup_section (info
)->contents
== NULL
)
3951 if (elf_hash_table (info
)->dynamic_sections_created
)
3952 bfinfdpic_pltrel_section (info
)->size
=
3953 gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
* get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3954 if (bfinfdpic_pltrel_section (info
)->size
== 0)
3955 bfinfdpic_pltrel_section (info
)->flags
|= SEC_EXCLUDE
;
3958 bfinfdpic_pltrel_section (info
)->contents
=
3959 (bfd_byte
*) bfd_zalloc (dynobj
,
3960 bfinfdpic_pltrel_section (info
)->size
);
3961 if (bfinfdpic_pltrel_section (info
)->contents
== NULL
)
3965 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
3966 such that there's room for the additional instruction needed to
3967 call the resolver. Since _bfinfdpic_assign_got_entries didn't
3968 account for them, our block size is 4 bytes smaller than the real
3970 if (elf_hash_table (info
)->dynamic_sections_created
)
3972 bfinfdpic_plt_section (info
)->size
= gpinfop
->g
.lzplt
3973 + ((gpinfop
->g
.lzplt
+ (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) - LZPLT_NORMAL_SIZE
)
3974 / (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) * LZPLT_RESOLVER_EXTRA
);
3977 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
3978 actually assign lazy PLT entries addresses. */
3979 gpinfop
->g
.lzplt
= 0;
3981 /* Save information that we're going to need to generate GOT and PLT
3983 bfinfdpic_got_initial_offset (info
) = -gpinfop
->gothilo
.min
;
3985 if (get_elf_backend_data (output_bfd
)->want_got_sym
)
3986 elf_hash_table (info
)->hgot
->root
.u
.def
.value
3987 = bfinfdpic_got_initial_offset (info
);
3989 if (elf_hash_table (info
)->dynamic_sections_created
)
3990 bfinfdpic_plt_initial_offset (info
) =
3991 bfinfdpic_plt_section (info
)->size
;
3993 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_plt_entries
,
3996 /* Allocate the PLT section contents only after
3997 _bfinfdpic_assign_plt_entries has a chance to add the size of the
3998 non-lazy PLT entries. */
3999 if (bfinfdpic_plt_section (info
)->size
== 0)
4000 bfinfdpic_plt_section (info
)->flags
|= SEC_EXCLUDE
;
4003 bfinfdpic_plt_section (info
)->contents
=
4004 (bfd_byte
*) bfd_zalloc (dynobj
,
4005 bfinfdpic_plt_section (info
)->size
);
4006 if (bfinfdpic_plt_section (info
)->contents
== NULL
)
4013 /* Set the sizes of the dynamic sections. */
4016 elf32_bfinfdpic_size_dynamic_sections (bfd
*output_bfd
,
4017 struct bfd_link_info
*info
)
4019 struct elf_link_hash_table
*htab
;
4022 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4024 htab
= elf_hash_table (info
);
4025 dynobj
= htab
->dynobj
;
4026 BFD_ASSERT (dynobj
!= NULL
);
4028 if (htab
->dynamic_sections_created
)
4030 /* Set the contents of the .interp section to the interpreter. */
4031 if (bfd_link_executable (info
) && !info
->nointerp
)
4033 s
= bfd_get_linker_section (dynobj
, ".interp");
4034 BFD_ASSERT (s
!= NULL
);
4035 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
4036 s
->contents
= (bfd_byte
*) ELF_DYNAMIC_INTERPRETER
;
4040 memset (&gpinfo
, 0, sizeof (gpinfo
));
4041 gpinfo
.g
.info
= info
;
4045 htab_t relocs
= bfinfdpic_relocs_info (info
);
4047 htab_traverse (relocs
, _bfinfdpic_resolve_final_relocs_info
, &relocs
);
4049 if (relocs
== bfinfdpic_relocs_info (info
))
4053 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_count_got_plt_entries
,
4056 /* Allocate space to save the summary information, we're going to
4057 use it if we're doing relaxations. */
4058 bfinfdpic_dynamic_got_plt_info (info
) = bfd_alloc (dynobj
, sizeof (gpinfo
.g
));
4060 if (!_bfinfdpic_size_got_plt (output_bfd
, &gpinfo
))
4063 if (elf_hash_table (info
)->dynamic_sections_created
)
4065 if (bfinfdpic_got_section (info
)->size
)
4066 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTGOT
, 0))
4069 if (bfinfdpic_pltrel_section (info
)->size
)
4070 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
4071 || !_bfd_elf_add_dynamic_entry (info
, DT_PLTREL
, DT_REL
)
4072 || !_bfd_elf_add_dynamic_entry (info
, DT_JMPREL
, 0))
4075 if (bfinfdpic_gotrel_section (info
)->size
)
4076 if (!_bfd_elf_add_dynamic_entry (info
, DT_REL
, 0)
4077 || !_bfd_elf_add_dynamic_entry (info
, DT_RELSZ
, 0)
4078 || !_bfd_elf_add_dynamic_entry (info
, DT_RELENT
,
4079 sizeof (Elf32_External_Rel
)))
4083 s
= bfd_get_linker_section (dynobj
, ".dynbss");
4084 if (s
&& s
->size
== 0)
4085 s
->flags
|= SEC_EXCLUDE
;
4087 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
4088 if (s
&& s
->size
== 0)
4089 s
->flags
|= SEC_EXCLUDE
;
4095 elf32_bfinfdpic_always_size_sections (bfd
*output_bfd
,
4096 struct bfd_link_info
*info
)
4098 if (!bfd_link_relocatable (info
)
4099 && !bfd_elf_stack_segment_size (output_bfd
, info
,
4100 "__stacksize", DEFAULT_STACK_SIZE
))
4106 /* Check whether any of the relocations was optimized away, and
4107 subtract it from the relocation or fixup count. */
4109 _bfinfdpic_check_discarded_relocs (bfd
*abfd
, asection
*sec
,
4110 struct bfd_link_info
*info
,
4111 bfd_boolean
*changed
)
4113 Elf_Internal_Shdr
*symtab_hdr
;
4114 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
4115 Elf_Internal_Rela
*rel
, *erel
;
4117 if ((sec
->flags
& SEC_RELOC
) == 0
4118 || sec
->reloc_count
== 0)
4121 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4122 sym_hashes
= elf_sym_hashes (abfd
);
4123 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
4124 if (!elf_bad_symtab (abfd
))
4125 sym_hashes_end
-= symtab_hdr
->sh_info
;
4127 rel
= elf_section_data (sec
)->relocs
;
4129 /* Now examine each relocation. */
4130 for (erel
= rel
+ sec
->reloc_count
; rel
< erel
; rel
++)
4132 struct elf_link_hash_entry
*h
;
4133 unsigned long r_symndx
;
4134 struct bfinfdpic_relocs_info
*picrel
;
4135 struct _bfinfdpic_dynamic_got_info
*dinfo
;
4137 if (ELF32_R_TYPE (rel
->r_info
) != R_BFIN_BYTE4_DATA
4138 && ELF32_R_TYPE (rel
->r_info
) != R_BFIN_FUNCDESC
)
4141 if (_bfd_elf_section_offset (sec
->output_section
->owner
,
4142 info
, sec
, rel
->r_offset
)
4146 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4147 if (r_symndx
< symtab_hdr
->sh_info
)
4151 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4152 while (h
->root
.type
== bfd_link_hash_indirect
4153 || h
->root
.type
== bfd_link_hash_warning
)
4154 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
4158 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4160 rel
->r_addend
, NO_INSERT
);
4162 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info
),
4164 rel
->r_addend
, NO_INSERT
);
4170 dinfo
= bfinfdpic_dynamic_got_plt_info (info
);
4172 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, TRUE
);
4173 if (ELF32_R_TYPE (rel
->r_info
) == R_BFIN_BYTE4_DATA
)
4175 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4177 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, FALSE
);
4184 bfinfdpic_elf_discard_info (bfd
*ibfd
,
4185 struct elf_reloc_cookie
*cookie ATTRIBUTE_UNUSED
,
4186 struct bfd_link_info
*info
)
4188 bfd_boolean changed
= FALSE
;
4192 /* Account for relaxation of .eh_frame section. */
4193 for (s
= ibfd
->sections
; s
; s
= s
->next
)
4194 if (s
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4196 if (!_bfinfdpic_check_discarded_relocs (ibfd
, s
, info
, &changed
))
4198 obfd
= s
->output_section
->owner
;
4203 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4205 memset (&gpinfo
, 0, sizeof (gpinfo
));
4206 memcpy (&gpinfo
.g
, bfinfdpic_dynamic_got_plt_info (info
),
4209 /* Clear GOT and PLT assignments. */
4210 htab_traverse (bfinfdpic_relocs_info (info
),
4211 _bfinfdpic_reset_got_plt_entries
,
4214 if (!_bfinfdpic_size_got_plt (obfd
, &gpinfo
))
4222 elf32_bfinfdpic_finish_dynamic_sections (bfd
*output_bfd
,
4223 struct bfd_link_info
*info
)
4228 dynobj
= elf_hash_table (info
)->dynobj
;
4230 if (bfinfdpic_got_section (info
))
4232 BFD_ASSERT (bfinfdpic_gotrel_section (info
)->size
4233 /* PR 17334: It appears that the GOT section can end up
4234 being bigger than the number of relocs. Presumably
4235 because some relocs have been deleted. A test case has
4236 yet to be generated for verify this, but in the meantime
4237 the test below has been changed from == to >= so that
4238 applications can continue to be built. */
4239 >= (bfinfdpic_gotrel_section (info
)->reloc_count
4240 * sizeof (Elf32_External_Rel
)));
4242 if (bfinfdpic_gotfixup_section (info
))
4244 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
4245 bfd_vma got_value
= hgot
->root
.u
.def
.value
4246 + hgot
->root
.u
.def
.section
->output_section
->vma
4247 + hgot
->root
.u
.def
.section
->output_offset
;
4249 _bfinfdpic_add_rofixup (output_bfd
, bfinfdpic_gotfixup_section (info
),
4252 if (bfinfdpic_gotfixup_section (info
)->size
4253 != (bfinfdpic_gotfixup_section (info
)->reloc_count
* 4))
4256 ("LINKER BUG: .rofixup section size mismatch");
4261 if (elf_hash_table (info
)->dynamic_sections_created
)
4263 BFD_ASSERT (bfinfdpic_pltrel_section (info
)->size
4264 == (bfinfdpic_pltrel_section (info
)->reloc_count
4265 * sizeof (Elf32_External_Rel
)));
4268 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4270 if (elf_hash_table (info
)->dynamic_sections_created
)
4272 Elf32_External_Dyn
* dyncon
;
4273 Elf32_External_Dyn
* dynconend
;
4275 BFD_ASSERT (sdyn
!= NULL
);
4277 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4278 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4280 for (; dyncon
< dynconend
; dyncon
++)
4282 Elf_Internal_Dyn dyn
;
4284 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4292 dyn
.d_un
.d_ptr
= bfinfdpic_got_section (info
)->output_section
->vma
4293 + bfinfdpic_got_section (info
)->output_offset
4294 + bfinfdpic_got_initial_offset (info
);
4295 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4299 dyn
.d_un
.d_ptr
= bfinfdpic_pltrel_section (info
)
4300 ->output_section
->vma
4301 + bfinfdpic_pltrel_section (info
)->output_offset
;
4302 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4306 dyn
.d_un
.d_val
= bfinfdpic_pltrel_section (info
)->size
;
4307 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4316 /* Adjust a symbol defined by a dynamic object and referenced by a
4320 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4321 struct elf_link_hash_entry
*h
)
4325 dynobj
= elf_hash_table (info
)->dynobj
;
4327 /* Make sure we know what is going on here. */
4328 BFD_ASSERT (dynobj
!= NULL
4332 && !h
->def_regular
)));
4334 /* If this is a weak symbol, and there is a real definition, the
4335 processor independent code will have arranged for us to see the
4336 real definition first, and we can just use the same value. */
4337 if (h
->is_weakalias
)
4339 struct elf_link_hash_entry
*def
= weakdef (h
);
4340 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
4341 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
4342 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
4348 /* Perform any actions needed for dynamic symbols. */
4351 elf32_bfinfdpic_finish_dynamic_symbol
4352 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4353 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4354 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
4355 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4360 /* Decide whether to attempt to turn absptr or lsda encodings in
4361 shared libraries into pcrel within the given input section. */
4364 bfinfdpic_elf_use_relative_eh_frame
4365 (bfd
*input_bfd ATTRIBUTE_UNUSED
,
4366 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4367 asection
*eh_frame_section ATTRIBUTE_UNUSED
)
4369 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4373 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4376 bfinfdpic_elf_encode_eh_address (bfd
*abfd
,
4377 struct bfd_link_info
*info
,
4378 asection
*osec
, bfd_vma offset
,
4379 asection
*loc_sec
, bfd_vma loc_offset
,
4382 struct elf_link_hash_entry
*h
;
4384 h
= elf_hash_table (info
)->hgot
;
4385 BFD_ASSERT (h
&& h
->root
.type
== bfd_link_hash_defined
);
4387 if (! h
|| (_bfinfdpic_osec_to_segment (abfd
, osec
)
4388 == _bfinfdpic_osec_to_segment (abfd
, loc_sec
->output_section
)))
4389 return _bfd_elf_encode_eh_address (abfd
, info
, osec
, offset
,
4390 loc_sec
, loc_offset
, encoded
);
4392 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd
, osec
)
4393 == (_bfinfdpic_osec_to_segment
4394 (abfd
, h
->root
.u
.def
.section
->output_section
)));
4396 *encoded
= osec
->vma
+ offset
4397 - (h
->root
.u
.def
.value
4398 + h
->root
.u
.def
.section
->output_section
->vma
4399 + h
->root
.u
.def
.section
->output_offset
);
4401 return DW_EH_PE_datarel
| DW_EH_PE_sdata4
;
4406 /* Look through the relocs for a section during the first phase.
4408 Besides handling virtual table relocs for gc, we have to deal with
4409 all sorts of PIC-related relocations. We describe below the
4410 general plan on how to handle such relocations, even though we only
4411 collect information at this point, storing them in hash tables for
4412 perusal of later passes.
4414 32 relocations are propagated to the linker output when creating
4415 position-independent output. LO16 and HI16 relocations are not
4416 supposed to be encountered in this case.
4418 LABEL16 should always be resolvable by the linker, since it's only
4421 LABEL24, on the other hand, is used by calls. If it turns out that
4422 the target of a call is a dynamic symbol, a PLT entry must be
4423 created for it, which triggers the creation of a private function
4424 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4426 GPREL relocations require the referenced symbol to be in the same
4427 segment as _gp, but this can only be checked later.
4429 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4430 exist. LABEL24 might as well, since it may require a PLT entry,
4431 that will require a got.
4433 Non-FUNCDESC GOT relocations require a GOT entry to be created
4434 regardless of whether the symbol is dynamic. However, since a
4435 global symbol that turns out to not be exported may have the same
4436 address of a non-dynamic symbol, we don't assign GOT entries at
4437 this point, such that we can share them in this case. A relocation
4438 for the GOT entry always has to be created, be it to offset a
4439 private symbol by the section load address, be it to get the symbol
4440 resolved dynamically.
4442 FUNCDESC GOT relocations require a GOT entry to be created, and
4443 handled as if a FUNCDESC relocation was applied to the GOT entry in
4446 FUNCDESC relocations referencing a symbol that turns out to NOT be
4447 dynamic cause a private function descriptor to be created. The
4448 FUNCDESC relocation then decays to a 32 relocation that points at
4449 the private descriptor. If the symbol is dynamic, the FUNCDESC
4450 relocation is propagated to the linker output, such that the
4451 dynamic linker creates the canonical descriptor, pointing to the
4452 dynamically-resolved definition of the function.
4454 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4455 symbols that are assigned to the same segment as the GOT, but we
4456 can only check this later, after we know the complete set of
4457 symbols defined and/or exported.
4459 FUNCDESC GOTOFF relocations require a function descriptor to be
4460 created and, unless lazy binding is disabled or the symbol is not
4461 dynamic, a lazy PLT entry. Since we can't tell at this point
4462 whether a symbol is going to be dynamic, we have to decide later
4463 whether to create a lazy PLT entry or bind the descriptor directly
4464 to the private function.
4466 FUNCDESC_VALUE relocations are not supposed to be present in object
4467 files, but they may very well be simply propagated to the linker
4468 output, since they have no side effect.
4471 A function descriptor always requires a FUNCDESC_VALUE relocation.
4472 Whether it's in .plt.rel or not depends on whether lazy binding is
4473 enabled and on whether the referenced symbol is dynamic.
4475 The existence of a lazy PLT requires the resolverStub lazy PLT
4476 entry to be present.
4479 As for assignment of GOT, PLT and lazy PLT entries, and private
4480 descriptors, we might do them all sequentially, but we can do
4481 better than that. For example, we can place GOT entries and
4482 private function descriptors referenced using 12-bit operands
4483 closer to the PIC register value, such that these relocations don't
4484 overflow. Those that are only referenced with LO16 relocations
4485 could come next, but we may as well place PLT-required function
4486 descriptors in the 12-bit range to make them shorter. Symbols
4487 referenced with LO16/HI16 may come next, but we may place
4488 additional function descriptors in the 16-bit range if we can
4489 reliably tell that we've already placed entries that are ever
4490 referenced with only LO16. PLT entries are therefore generated as
4491 small as possible, while not introducing relocation overflows in
4492 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4493 generated before or after PLT entries, but not intermingled with
4494 them, such that we can have more lazy PLT entries in range for a
4495 branch to the resolverStub. The resolverStub should be emitted at
4496 the most distant location from the first lazy PLT entry such that
4497 it's still in range for a branch, or closer, if there isn't a need
4498 for so many lazy PLT entries. Additional lazy PLT entries may be
4499 emitted after the resolverStub, as long as branches are still in
4500 range. If the branch goes out of range, longer lazy PLT entries
4503 We could further optimize PLT and lazy PLT entries by giving them
4504 priority in assignment to closer-to-gr17 locations depending on the
4505 number of occurrences of references to them (assuming a function
4506 that's called more often is more important for performance, so its
4507 PLT entry should be faster), or taking hints from the compiler.
4508 Given infinite time and money... :-) */
4511 bfinfdpic_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4512 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4514 Elf_Internal_Shdr
*symtab_hdr
;
4515 struct elf_link_hash_entry
**sym_hashes
;
4516 const Elf_Internal_Rela
*rel
;
4517 const Elf_Internal_Rela
*rel_end
;
4519 struct bfinfdpic_relocs_info
*picrel
;
4521 if (bfd_link_relocatable (info
))
4524 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4525 sym_hashes
= elf_sym_hashes (abfd
);
4527 dynobj
= elf_hash_table (info
)->dynobj
;
4528 rel_end
= relocs
+ sec
->reloc_count
;
4529 for (rel
= relocs
; rel
< rel_end
; rel
++)
4531 struct elf_link_hash_entry
*h
;
4532 unsigned long r_symndx
;
4534 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4535 if (r_symndx
< symtab_hdr
->sh_info
)
4538 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4540 switch (ELF32_R_TYPE (rel
->r_info
))
4542 case R_BFIN_GOT17M4
:
4545 case R_BFIN_FUNCDESC_GOT17M4
:
4546 case R_BFIN_FUNCDESC_GOTHI
:
4547 case R_BFIN_FUNCDESC_GOTLO
:
4548 case R_BFIN_GOTOFF17M4
:
4549 case R_BFIN_GOTOFFHI
:
4550 case R_BFIN_GOTOFFLO
:
4551 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4552 case R_BFIN_FUNCDESC_GOTOFFHI
:
4553 case R_BFIN_FUNCDESC_GOTOFFLO
:
4554 case R_BFIN_FUNCDESC
:
4555 case R_BFIN_FUNCDESC_VALUE
:
4556 if (! IS_FDPIC (abfd
))
4559 case R_BFIN_PCREL24
:
4560 case R_BFIN_PCREL24_JUMP_L
:
4561 case R_BFIN_BYTE4_DATA
:
4562 if (IS_FDPIC (abfd
) && ! dynobj
)
4564 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4565 if (! _bfin_create_got_section (abfd
, info
))
4568 if (! IS_FDPIC (abfd
))
4575 if (h
->dynindx
== -1)
4576 switch (ELF_ST_VISIBILITY (h
->other
))
4582 bfd_elf_link_record_dynamic_symbol (info
, h
);
4586 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4588 rel
->r_addend
, INSERT
);
4591 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4592 (info
), abfd
, r_symndx
,
4593 rel
->r_addend
, INSERT
);
4603 switch (ELF32_R_TYPE (rel
->r_info
))
4605 case R_BFIN_PCREL24
:
4606 case R_BFIN_PCREL24_JUMP_L
:
4607 if (IS_FDPIC (abfd
))
4611 case R_BFIN_FUNCDESC_VALUE
:
4612 picrel
->relocsfdv
++;
4613 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4617 case R_BFIN_BYTE4_DATA
:
4618 if (! IS_FDPIC (abfd
))
4622 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4626 case R_BFIN_GOT17M4
:
4635 case R_BFIN_FUNCDESC_GOT17M4
:
4636 picrel
->fdgot17m4
++;
4639 case R_BFIN_FUNCDESC_GOTHI
:
4640 case R_BFIN_FUNCDESC_GOTLO
:
4641 picrel
->fdgothilo
++;
4644 case R_BFIN_GOTOFF17M4
:
4645 case R_BFIN_GOTOFFHI
:
4646 case R_BFIN_GOTOFFLO
:
4650 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4651 picrel
->fdgoff17m4
++;
4654 case R_BFIN_FUNCDESC_GOTOFFHI
:
4655 case R_BFIN_FUNCDESC_GOTOFFLO
:
4656 picrel
->fdgoffhilo
++;
4659 case R_BFIN_FUNCDESC
:
4664 /* This relocation describes the C++ object vtable hierarchy.
4665 Reconstruct it for later use during GC. */
4666 case R_BFIN_GNU_VTINHERIT
:
4667 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4671 /* This relocation describes which C++ vtable entries are actually
4672 used. Record for later use during GC. */
4673 case R_BFIN_GNU_VTENTRY
:
4674 BFD_ASSERT (h
!= NULL
);
4676 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4680 case R_BFIN_HUIMM16
:
4681 case R_BFIN_LUIMM16
:
4682 case R_BFIN_PCREL12_JUMP_S
:
4683 case R_BFIN_PCREL10
:
4689 /* xgettext:c-format */
4690 (_("%pB: unsupported relocation type %d"),
4691 abfd
, (int) ELF32_R_TYPE (rel
->r_info
));
4699 /* Set the right machine number for a Blackfin ELF file. */
4702 elf32_bfin_object_p (bfd
*abfd
)
4704 bfd_default_set_arch_mach (abfd
, bfd_arch_bfin
, 0);
4705 return (((elf_elfheader (abfd
)->e_flags
& EF_BFIN_FDPIC
) != 0)
4706 == (IS_FDPIC (abfd
)));
4710 elf32_bfin_set_private_flags (bfd
* abfd
, flagword flags
)
4712 elf_elfheader (abfd
)->e_flags
= flags
;
4713 elf_flags_init (abfd
) = TRUE
;
4717 /* Display the flags field. */
4719 elf32_bfin_print_private_bfd_data (bfd
* abfd
, void * ptr
)
4721 FILE *file
= (FILE *) ptr
;
4724 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
4726 /* Print normal ELF private data. */
4727 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
4729 flags
= elf_elfheader (abfd
)->e_flags
;
4731 /* xgettext:c-format */
4732 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
4734 if (flags
& EF_BFIN_PIC
)
4735 fprintf (file
, " -fpic");
4737 if (flags
& EF_BFIN_FDPIC
)
4738 fprintf (file
, " -mfdpic");
4745 /* Merge backend specific data from an object file to the output
4746 object file when linking. */
4749 elf32_bfin_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
4751 bfd
*obfd
= info
->output_bfd
;
4752 flagword old_flags
, new_flags
;
4753 bfd_boolean error
= FALSE
;
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 /* bfin ELF linker hash table. */
4805 struct bfin_link_hash_table
4807 struct elf_link_hash_table root
;
4809 /* Small local sym cache. */
4810 struct sym_cache sym_cache
;
4813 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4815 static struct bfd_hash_entry
*
4816 bfin_link_hash_newfunc (struct bfd_hash_entry
*entry
,
4817 struct bfd_hash_table
*table
, const char *string
)
4819 struct bfd_hash_entry
*ret
= entry
;
4821 /* Allocate the structure if it has not already been allocated by a
4824 ret
= bfd_hash_allocate (table
, sizeof (struct bfin_link_hash_entry
));
4828 /* Call the allocation method of the superclass. */
4829 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
4831 bfin_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
4836 /* Create an bfin ELF linker hash table. */
4838 static struct bfd_link_hash_table
*
4839 bfin_link_hash_table_create (bfd
* abfd
)
4841 struct bfin_link_hash_table
*ret
;
4842 bfd_size_type amt
= sizeof (struct bfin_link_hash_table
);
4844 ret
= bfd_zmalloc (amt
);
4848 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
4849 bfin_link_hash_newfunc
,
4850 sizeof (struct elf_link_hash_entry
),
4857 ret
->sym_cache
.abfd
= NULL
;
4859 return &ret
->root
.root
;
4862 /* The size in bytes of an entry in the procedure linkage table. */
4864 /* Finish up the dynamic sections. */
4867 bfin_finish_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4868 struct bfd_link_info
*info
)
4873 dynobj
= elf_hash_table (info
)->dynobj
;
4875 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4877 if (elf_hash_table (info
)->dynamic_sections_created
)
4879 Elf32_External_Dyn
*dyncon
, *dynconend
;
4881 BFD_ASSERT (sdyn
!= NULL
);
4883 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4884 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4885 for (; dyncon
< dynconend
; dyncon
++)
4887 Elf_Internal_Dyn dyn
;
4889 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4897 /* Finish up dynamic symbol handling. We set the contents of various
4898 dynamic sections here. */
4901 bfin_finish_dynamic_symbol (bfd
* output_bfd
,
4902 struct bfd_link_info
*info
,
4903 struct elf_link_hash_entry
*h
,
4904 Elf_Internal_Sym
* sym
)
4906 if (h
->got
.offset
!= (bfd_vma
) - 1)
4910 Elf_Internal_Rela rela
;
4913 /* This symbol has an entry in the global offset table.
4916 sgot
= elf_hash_table (info
)->sgot
;
4917 srela
= elf_hash_table (info
)->srelgot
;
4918 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
4920 rela
.r_offset
= (sgot
->output_section
->vma
4921 + sgot
->output_offset
4922 + (h
->got
.offset
& ~(bfd_vma
) 1));
4924 /* If this is a -Bsymbolic link, and the symbol is defined
4925 locally, we just want to emit a RELATIVE reloc. Likewise if
4926 the symbol was forced to be local because of a version file.
4927 The entry in the global offset table will already have been
4928 initialized in the relocate_section function. */
4929 if (bfd_link_pic (info
)
4931 || h
->dynindx
== -1 || h
->forced_local
) && h
->def_regular
)
4933 _bfd_error_handler (_("*** check this relocation %s"),
4935 rela
.r_info
= ELF32_R_INFO (0, R_BFIN_PCREL24
);
4936 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
4940 offset
& ~(bfd_vma
) 1)));
4944 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4945 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
4946 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_BFIN_GOT
);
4950 loc
= srela
->contents
;
4951 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
4952 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
4959 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4960 if (strcmp (h
->root
.root
.string
, "__DYNAMIC") == 0
4961 || h
== elf_hash_table (info
)->hgot
)
4962 sym
->st_shndx
= SHN_ABS
;
4967 /* Adjust a symbol defined by a dynamic object and referenced by a
4968 regular object. The current definition is in some section of the
4969 dynamic object, but we're not including those sections. We have to
4970 change the definition to something the rest of the link can
4974 bfin_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4975 struct elf_link_hash_entry
*h
)
4979 unsigned int power_of_two
;
4981 dynobj
= elf_hash_table (info
)->dynobj
;
4983 /* Make sure we know what is going on here. */
4984 BFD_ASSERT (dynobj
!= NULL
4987 || (h
->def_dynamic
&& h
->ref_regular
&& !h
->def_regular
)));
4989 /* If this is a function, put it in the procedure linkage table. We
4990 will fill in the contents of the procedure linkage table later,
4991 when we know the address of the .got section. */
4992 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
4997 /* If this is a weak symbol, and there is a real definition, the
4998 processor independent code will have arranged for us to see the
4999 real definition first, and we can just use the same value. */
5000 if (h
->is_weakalias
)
5002 struct elf_link_hash_entry
*def
= weakdef (h
);
5003 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
5004 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
5005 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
5009 /* This is a reference to a symbol defined by a dynamic object which
5010 is not a function. */
5012 /* If we are creating a shared library, we must presume that the
5013 only references to the symbol are via the global offset table.
5014 For such cases we need not do anything here; the relocations will
5015 be handled correctly by relocate_section. */
5016 if (bfd_link_pic (info
))
5019 /* We must allocate the symbol in our .dynbss section, which will
5020 become part of the .bss section of the executable. There will be
5021 an entry for this symbol in the .dynsym section. The dynamic
5022 object will contain position independent code, so all references
5023 from the dynamic object to this symbol will go through the global
5024 offset table. The dynamic linker will use the .dynsym entry to
5025 determine the address it must put in the global offset table, so
5026 both the dynamic object and the regular object will refer to the
5027 same memory location for the variable. */
5029 s
= bfd_get_linker_section (dynobj
, ".dynbss");
5030 BFD_ASSERT (s
!= NULL
);
5032 #if 0 /* Bfin does not currently have a COPY reloc. */
5033 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to
5034 copy the initial value out of the dynamic object and into the
5035 runtime process image. We need to remember the offset into the
5036 .rela.bss section we are going to use. */
5037 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5041 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
5042 BFD_ASSERT (srel
!= NULL
);
5043 srel
->size
+= sizeof (Elf32_External_Rela
);
5047 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5049 _bfd_error_handler (_("the bfin target does not currently support the generation of copy relocations"));
5053 /* We need to figure out the alignment required for this symbol. I
5054 have no idea how ELF linkers handle this. */
5055 power_of_two
= bfd_log2 (h
->size
);
5056 if (power_of_two
> 3)
5059 /* Apply the required alignment. */
5060 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
5061 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
5063 if (!bfd_set_section_alignment (dynobj
, s
, power_of_two
))
5067 /* Define the symbol as being at this point in the section. */
5068 h
->root
.u
.def
.section
= s
;
5069 h
->root
.u
.def
.value
= s
->size
;
5071 /* Increment the section size to make room for the symbol. */
5077 /* The bfin linker needs to keep track of the number of relocs that it
5078 decides to copy in check_relocs for each symbol. This is so that it
5079 can discard PC relative relocs if it doesn't need them when linking
5080 with -Bsymbolic. We store the information in a field extending the
5081 regular ELF linker hash table. */
5083 /* This structure keeps track of the number of PC relative relocs we have
5084 copied for a given symbol. */
5086 struct bfin_pcrel_relocs_copied
5089 struct bfin_pcrel_relocs_copied
*next
;
5090 /* A section in dynobj. */
5092 /* Number of relocs copied in this section. */
5093 bfd_size_type count
;
5096 /* This function is called via elf_link_hash_traverse if we are
5097 creating a shared object. In the -Bsymbolic case it discards the
5098 space allocated to copy PC relative relocs against symbols which
5099 are defined in regular objects. For the normal shared case, it
5100 discards space for pc-relative relocs that have become local due to
5101 symbol visibility changes. We allocated space for them in the
5102 check_relocs routine, but we won't fill them in in the
5103 relocate_section routine.
5105 We also check whether any of the remaining relocations apply
5106 against a readonly section, and set the DF_TEXTREL flag in this
5110 bfin_discard_copies (struct elf_link_hash_entry
*h
, void * inf
)
5112 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5113 struct bfin_pcrel_relocs_copied
*s
;
5115 if (!h
->def_regular
|| (!info
->symbolic
&& !h
->forced_local
))
5117 if ((info
->flags
& DF_TEXTREL
) == 0)
5119 /* Look for relocations against read-only sections. */
5120 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5121 s
!= NULL
; s
= s
->next
)
5122 if ((s
->section
->flags
& SEC_READONLY
) != 0)
5124 info
->flags
|= DF_TEXTREL
;
5132 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5133 s
!= NULL
; s
= s
->next
)
5134 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
5140 bfin_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
5141 struct bfd_link_info
*info
)
5147 dynobj
= elf_hash_table (info
)->dynobj
;
5148 BFD_ASSERT (dynobj
!= NULL
);
5150 if (elf_hash_table (info
)->dynamic_sections_created
)
5152 /* Set the contents of the .interp section to the interpreter. */
5153 if (bfd_link_executable (info
) && !info
->nointerp
)
5155 s
= bfd_get_linker_section (dynobj
, ".interp");
5156 BFD_ASSERT (s
!= NULL
);
5157 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5158 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5163 /* We may have created entries in the .rela.got section.
5164 However, if we are not creating the dynamic sections, we will
5165 not actually use these entries. Reset the size of .rela.got,
5166 which will cause it to get stripped from the output file
5168 s
= elf_hash_table (info
)->srelgot
;
5173 /* If this is a -Bsymbolic shared link, then we need to discard all
5174 PC relative relocs against symbols defined in a regular object.
5175 For the normal shared case we discard the PC relative relocs
5176 against symbols that have become local due to visibility changes.
5177 We allocated space for them in the check_relocs routine, but we
5178 will not fill them in in the relocate_section routine. */
5179 if (bfd_link_pic (info
))
5180 elf_link_hash_traverse (elf_hash_table (info
),
5181 bfin_discard_copies
, info
);
5183 /* The check_relocs and adjust_dynamic_symbol entry points have
5184 determined the sizes of the various dynamic sections. Allocate
5187 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5192 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5195 /* It's OK to base decisions on the section name, because none
5196 of the dynobj section names depend upon the input files. */
5197 name
= bfd_get_section_name (dynobj
, s
);
5201 if (CONST_STRNEQ (name
, ".rela"))
5205 /* If we don't need this section, strip it from the
5206 output file. This is mostly to handle .rela.bss and
5207 .rela.plt. We must create both sections in
5208 create_dynamic_sections, because they must be created
5209 before the linker maps input sections to output
5210 sections. The linker does that before
5211 adjust_dynamic_symbol is called, and it is that
5212 function which decides whether anything needs to go
5213 into these sections. */
5220 /* We use the reloc_count field as a counter if we need
5221 to copy relocs into the output file. */
5225 else if (! CONST_STRNEQ (name
, ".got"))
5227 /* It's not one of our sections, so don't allocate space. */
5233 s
->flags
|= SEC_EXCLUDE
;
5237 /* Allocate memory for the section contents. */
5238 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5239 Unused entries should be reclaimed before the section's contents
5240 are written out, but at the moment this does not happen. Thus in
5241 order to prevent writing out garbage, we initialise the section's
5242 contents to zero. */
5243 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
5244 if (s
->contents
== NULL
&& s
->size
!= 0)
5248 if (elf_hash_table (info
)->dynamic_sections_created
)
5250 /* Add some entries to the .dynamic section. We fill in the
5251 values later, in bfin_finish_dynamic_sections, but we
5252 must add the entries now so that we get the correct size for
5253 the .dynamic section. The DT_DEBUG entry is filled in by the
5254 dynamic linker and used by the debugger. */
5255 #define add_dynamic_entry(TAG, VAL) \
5256 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5258 if (!bfd_link_pic (info
))
5260 if (!add_dynamic_entry (DT_DEBUG
, 0))
5267 if (!add_dynamic_entry (DT_RELA
, 0)
5268 || !add_dynamic_entry (DT_RELASZ
, 0)
5269 || !add_dynamic_entry (DT_RELAENT
,
5270 sizeof (Elf32_External_Rela
)))
5274 if ((info
->flags
& DF_TEXTREL
) != 0)
5276 if (!add_dynamic_entry (DT_TEXTREL
, 0))
5280 #undef add_dynamic_entry
5285 /* Given a .data section and a .emreloc in-memory section, store
5286 relocation information into the .emreloc section which can be
5287 used at runtime to relocate the section. This is called by the
5288 linker when the --embedded-relocs switch is used. This is called
5289 after the add_symbols entry point has been called for all the
5290 objects, and before the final_link entry point is called. */
5293 bfd_bfin_elf32_create_embedded_relocs (bfd
*abfd
,
5294 struct bfd_link_info
*info
,
5299 Elf_Internal_Shdr
*symtab_hdr
;
5300 Elf_Internal_Sym
*isymbuf
= NULL
;
5301 Elf_Internal_Rela
*internal_relocs
= NULL
;
5302 Elf_Internal_Rela
*irel
, *irelend
;
5306 BFD_ASSERT (! bfd_link_relocatable (info
));
5310 if (datasec
->reloc_count
== 0)
5313 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5315 /* Get a copy of the native relocations. */
5316 internal_relocs
= (_bfd_elf_link_read_relocs
5317 (abfd
, datasec
, NULL
, (Elf_Internal_Rela
*) NULL
,
5318 info
->keep_memory
));
5319 if (internal_relocs
== NULL
)
5322 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
5323 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
5324 if (relsec
->contents
== NULL
)
5327 p
= relsec
->contents
;
5329 irelend
= internal_relocs
+ datasec
->reloc_count
;
5330 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
5332 asection
*targetsec
;
5334 /* We are going to write a four byte longword into the runtime
5335 reloc section. The longword will be the address in the data
5336 section which must be relocated. It is followed by the name
5337 of the target section NUL-padded or truncated to 8
5340 /* We can only relocate absolute longword relocs at run time. */
5341 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_BFIN_BYTE4_DATA
)
5343 *errmsg
= _("unsupported reloc type");
5344 bfd_set_error (bfd_error_bad_value
);
5348 /* Get the target section referred to by the reloc. */
5349 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
5351 /* A local symbol. */
5352 Elf_Internal_Sym
*isym
;
5354 /* Read this BFD's local symbols if we haven't done so already. */
5355 if (isymbuf
== NULL
)
5357 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5358 if (isymbuf
== NULL
)
5359 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
5360 symtab_hdr
->sh_info
, 0,
5362 if (isymbuf
== NULL
)
5366 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
5367 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5372 struct elf_link_hash_entry
*h
;
5374 /* An external symbol. */
5375 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
5376 h
= elf_sym_hashes (abfd
)[indx
];
5377 BFD_ASSERT (h
!= NULL
);
5378 if (h
->root
.type
== bfd_link_hash_defined
5379 || h
->root
.type
== bfd_link_hash_defweak
)
5380 targetsec
= h
->root
.u
.def
.section
;
5385 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
5386 memset (p
+ 4, 0, 8);
5387 if (targetsec
!= NULL
)
5388 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
5391 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5393 if (internal_relocs
!= NULL
5394 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5395 free (internal_relocs
);
5399 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5401 if (internal_relocs
!= NULL
5402 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5403 free (internal_relocs
);
5407 struct bfd_elf_special_section
const elf32_bfin_special_sections
[] =
5409 { ".l1.text", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
5410 { ".l1.data", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
5411 { NULL
, 0, 0, 0, 0 }
5415 #define TARGET_LITTLE_SYM bfin_elf32_vec
5416 #define TARGET_LITTLE_NAME "elf32-bfin"
5417 #define ELF_ARCH bfd_arch_bfin
5418 #define ELF_TARGET_ID BFIN_ELF_DATA
5419 #define ELF_MACHINE_CODE EM_BLACKFIN
5420 #define ELF_MAXPAGESIZE 0x1000
5421 #define elf_symbol_leading_char '_'
5423 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5424 #define bfd_elf32_bfd_reloc_name_lookup \
5425 bfin_bfd_reloc_name_lookup
5426 #define elf_info_to_howto bfin_info_to_howto
5427 #define elf_info_to_howto_rel 0
5428 #define elf_backend_object_p elf32_bfin_object_p
5430 #define bfd_elf32_bfd_is_local_label_name \
5431 bfin_is_local_label_name
5432 #define bfin_hash_table(p) \
5433 ((struct bfin_link_hash_table *) (p)->hash)
5437 #define elf_backend_create_dynamic_sections \
5438 _bfd_elf_create_dynamic_sections
5439 #define bfd_elf32_bfd_link_hash_table_create \
5440 bfin_link_hash_table_create
5441 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5443 #define elf_backend_check_relocs bfin_check_relocs
5444 #define elf_backend_adjust_dynamic_symbol \
5445 bfin_adjust_dynamic_symbol
5446 #define elf_backend_size_dynamic_sections \
5447 bfin_size_dynamic_sections
5448 #define elf_backend_relocate_section bfin_relocate_section
5449 #define elf_backend_finish_dynamic_symbol \
5450 bfin_finish_dynamic_symbol
5451 #define elf_backend_finish_dynamic_sections \
5452 bfin_finish_dynamic_sections
5453 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5454 #define bfd_elf32_bfd_merge_private_bfd_data \
5455 elf32_bfin_merge_private_bfd_data
5456 #define bfd_elf32_bfd_set_private_flags \
5457 elf32_bfin_set_private_flags
5458 #define bfd_elf32_bfd_print_private_bfd_data \
5459 elf32_bfin_print_private_bfd_data
5460 #define elf_backend_final_write_processing \
5461 elf32_bfin_final_write_processing
5462 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5463 #define elf_backend_stack_align 8
5464 #define elf_backend_can_gc_sections 1
5465 #define elf_backend_special_sections elf32_bfin_special_sections
5466 #define elf_backend_can_refcount 1
5467 #define elf_backend_want_got_plt 0
5468 #define elf_backend_plt_readonly 1
5469 #define elf_backend_want_plt_sym 0
5470 #define elf_backend_got_header_size 12
5471 #define elf_backend_rela_normal 1
5473 #include "elf32-target.h"
5475 #undef TARGET_LITTLE_SYM
5476 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5477 #undef TARGET_LITTLE_NAME
5478 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5480 #define elf32_bed elf32_bfinfdpic_bed
5482 #undef elf_backend_got_header_size
5483 #define elf_backend_got_header_size 0
5485 #undef elf_backend_relocate_section
5486 #define elf_backend_relocate_section bfinfdpic_relocate_section
5487 #undef elf_backend_check_relocs
5488 #define elf_backend_check_relocs bfinfdpic_check_relocs
5490 #undef bfd_elf32_bfd_link_hash_table_create
5491 #define bfd_elf32_bfd_link_hash_table_create \
5492 bfinfdpic_elf_link_hash_table_create
5493 #undef elf_backend_always_size_sections
5494 #define elf_backend_always_size_sections \
5495 elf32_bfinfdpic_always_size_sections
5497 #undef elf_backend_create_dynamic_sections
5498 #define elf_backend_create_dynamic_sections \
5499 elf32_bfinfdpic_create_dynamic_sections
5500 #undef elf_backend_adjust_dynamic_symbol
5501 #define elf_backend_adjust_dynamic_symbol \
5502 elf32_bfinfdpic_adjust_dynamic_symbol
5503 #undef elf_backend_size_dynamic_sections
5504 #define elf_backend_size_dynamic_sections \
5505 elf32_bfinfdpic_size_dynamic_sections
5506 #undef elf_backend_finish_dynamic_symbol
5507 #define elf_backend_finish_dynamic_symbol \
5508 elf32_bfinfdpic_finish_dynamic_symbol
5509 #undef elf_backend_finish_dynamic_sections
5510 #define elf_backend_finish_dynamic_sections \
5511 elf32_bfinfdpic_finish_dynamic_sections
5513 #undef elf_backend_discard_info
5514 #define elf_backend_discard_info \
5515 bfinfdpic_elf_discard_info
5516 #undef elf_backend_can_make_relative_eh_frame
5517 #define elf_backend_can_make_relative_eh_frame \
5518 bfinfdpic_elf_use_relative_eh_frame
5519 #undef elf_backend_can_make_lsda_relative_eh_frame
5520 #define elf_backend_can_make_lsda_relative_eh_frame \
5521 bfinfdpic_elf_use_relative_eh_frame
5522 #undef elf_backend_encode_eh_address
5523 #define elf_backend_encode_eh_address \
5524 bfinfdpic_elf_encode_eh_address
5526 #undef elf_backend_may_use_rel_p
5527 #define elf_backend_may_use_rel_p 1
5528 #undef elf_backend_may_use_rela_p
5529 #define elf_backend_may_use_rela_p 1
5530 /* We use REL for dynamic relocations only. */
5531 #undef elf_backend_default_use_rela_p
5532 #define elf_backend_default_use_rela_p 1
5534 #undef elf_backend_omit_section_dynsym
5535 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5537 #include "elf32-target.h"