1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2019 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
,
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
];
1060 /* xgettext:c-format */
1061 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1063 bfd_set_error (bfd_error_bad_value
);
1070 /* Given a BFD reloc type, return the howto. */
1071 static reloc_howto_type
*
1072 bfin_bfd_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1073 bfd_reloc_code_real_type code
)
1076 unsigned int r_type
= (unsigned int) -1;
1078 for (i
= sizeof (bfin_reloc_map
) / sizeof (bfin_reloc_map
[0]); i
--;)
1079 if (bfin_reloc_map
[i
].bfd_reloc_val
== code
)
1080 r_type
= bfin_reloc_map
[i
].bfin_reloc_val
;
1082 if (r_type
<= BFIN_RELOC_MAX
)
1083 return &bfin_howto_table
[r_type
];
1085 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1086 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1088 return (reloc_howto_type
*) NULL
;
1091 static reloc_howto_type
*
1092 bfin_bfd_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1098 i
< (sizeof (bfin_howto_table
)
1099 / sizeof (bfin_howto_table
[0]));
1101 if (bfin_howto_table
[i
].name
!= NULL
1102 && strcasecmp (bfin_howto_table
[i
].name
, r_name
) == 0)
1103 return &bfin_howto_table
[i
];
1106 i
< (sizeof (bfin_gnuext_howto_table
)
1107 / sizeof (bfin_gnuext_howto_table
[0]));
1109 if (bfin_gnuext_howto_table
[i
].name
!= NULL
1110 && strcasecmp (bfin_gnuext_howto_table
[i
].name
, r_name
) == 0)
1111 return &bfin_gnuext_howto_table
[i
];
1116 /* Given a bfin relocation type, return the howto. */
1117 static reloc_howto_type
*
1118 bfin_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1119 unsigned int r_type
)
1121 if (r_type
<= BFIN_RELOC_MAX
)
1122 return &bfin_howto_table
[r_type
];
1124 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1125 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1127 return (reloc_howto_type
*) NULL
;
1130 /* Set by ld emulation if --code-in-l1. */
1131 bfd_boolean elf32_bfin_code_in_l1
= 0;
1133 /* Set by ld emulation if --data-in-l1. */
1134 bfd_boolean elf32_bfin_data_in_l1
= 0;
1137 elf32_bfin_final_write_processing (bfd
*abfd
,
1138 bfd_boolean linker ATTRIBUTE_UNUSED
)
1140 if (elf32_bfin_code_in_l1
)
1141 elf_elfheader (abfd
)->e_flags
|= EF_BFIN_CODE_IN_L1
;
1142 if (elf32_bfin_data_in_l1
)
1143 elf_elfheader (abfd
)->e_flags
|= EF_BFIN_DATA_IN_L1
;
1146 /* Return TRUE if the name is a local label.
1147 bfin local labels begin with L$. */
1149 bfin_is_local_label_name (bfd
*abfd
, const char *label
)
1151 if (label
[0] == 'L' && label
[1] == '$' )
1154 return _bfd_elf_is_local_label_name (abfd
, label
);
1157 /* Look through the relocs for a section during the first phase, and
1158 allocate space in the global offset table or procedure linkage
1162 bfin_check_relocs (bfd
* abfd
,
1163 struct bfd_link_info
*info
,
1165 const Elf_Internal_Rela
*relocs
)
1168 Elf_Internal_Shdr
*symtab_hdr
;
1169 struct elf_link_hash_entry
**sym_hashes
;
1170 bfd_signed_vma
*local_got_refcounts
;
1171 const Elf_Internal_Rela
*rel
;
1172 const Elf_Internal_Rela
*rel_end
;
1176 if (bfd_link_relocatable (info
))
1179 dynobj
= elf_hash_table (info
)->dynobj
;
1180 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1181 sym_hashes
= elf_sym_hashes (abfd
);
1182 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1187 rel_end
= relocs
+ sec
->reloc_count
;
1188 for (rel
= relocs
; rel
< rel_end
; rel
++)
1190 unsigned long r_symndx
;
1191 struct elf_link_hash_entry
*h
;
1193 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1194 if (r_symndx
< symtab_hdr
->sh_info
)
1198 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1201 switch (ELF32_R_TYPE (rel
->r_info
))
1203 /* This relocation describes the C++ object vtable hierarchy.
1204 Reconstruct it for later use during GC. */
1205 case R_BFIN_GNU_VTINHERIT
:
1206 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1210 /* This relocation describes which C++ vtable entries
1211 are actually used. Record for later use during GC. */
1212 case R_BFIN_GNU_VTENTRY
:
1213 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1219 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1225 /* Create the .got section. */
1226 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1227 if (!_bfd_elf_create_got_section (dynobj
, info
))
1231 sgot
= elf_hash_table (info
)->sgot
;
1232 srelgot
= elf_hash_table (info
)->srelgot
;
1233 BFD_ASSERT (sgot
!= NULL
);
1237 if (h
->got
.refcount
== 0)
1239 /* Make sure this symbol is output as a dynamic symbol. */
1240 if (h
->dynindx
== -1 && !h
->forced_local
)
1242 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
1246 /* Allocate space in the .got section. */
1248 /* Allocate relocation space. */
1249 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1255 /* This is a global offset table entry for a local symbol. */
1256 if (local_got_refcounts
== NULL
)
1260 size
= symtab_hdr
->sh_info
;
1261 size
*= sizeof (bfd_signed_vma
);
1262 local_got_refcounts
= ((bfd_signed_vma
*)
1263 bfd_zalloc (abfd
, size
));
1264 if (local_got_refcounts
== NULL
)
1266 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1268 if (local_got_refcounts
[r_symndx
] == 0)
1271 if (bfd_link_pic (info
))
1273 /* If we are generating a shared object, we need to
1274 output a R_68K_RELATIVE reloc so that the dynamic
1275 linker can adjust this GOT entry. */
1276 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1279 local_got_refcounts
[r_symndx
]++;
1291 static enum elf_reloc_type_class
1292 elf32_bfin_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1293 const asection
*rel_sec ATTRIBUTE_UNUSED
,
1294 const Elf_Internal_Rela
* rela
)
1296 switch ((int) ELF32_R_TYPE (rela
->r_info
))
1299 return reloc_class_normal
;
1303 static bfd_reloc_status_type
1304 bfin_final_link_relocate (Elf_Internal_Rela
*rel
, reloc_howto_type
*howto
,
1305 bfd
*input_bfd
, asection
*input_section
,
1306 bfd_byte
*contents
, bfd_vma address
,
1307 bfd_vma value
, bfd_vma addend
)
1309 int r_type
= ELF32_R_TYPE (rel
->r_info
);
1311 if (r_type
== R_BFIN_PCREL24
|| r_type
== R_BFIN_PCREL24_JUMP_L
)
1313 bfd_reloc_status_type r
= bfd_reloc_ok
;
1316 if (address
> bfd_get_section_limit (input_bfd
, input_section
))
1317 return bfd_reloc_outofrange
;
1321 /* Perform usual pc-relative correction. */
1322 value
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
1325 /* We are getting reloc_entry->address 2 byte off from
1326 the start of instruction. Assuming absolute postion
1327 of the reloc data. But, following code had been written assuming
1328 reloc address is starting at begining of instruction.
1329 To compensate that I have increased the value of
1330 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1335 if ((value
& 0xFF000000) != 0
1336 && (value
& 0xFF000000) != 0xFF000000)
1337 r
= bfd_reloc_overflow
;
1341 x
= bfd_get_16 (input_bfd
, contents
+ address
);
1342 x
= (x
& 0xff00) | ((value
>> 16) & 0xff);
1343 bfd_put_16 (input_bfd
, x
, contents
+ address
);
1345 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
1347 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
1351 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
, contents
,
1352 rel
->r_offset
, value
, addend
);
1357 bfin_relocate_section (bfd
* output_bfd
,
1358 struct bfd_link_info
*info
,
1360 asection
* input_section
,
1361 bfd_byte
* contents
,
1362 Elf_Internal_Rela
* relocs
,
1363 Elf_Internal_Sym
* local_syms
,
1364 asection
** local_sections
)
1367 Elf_Internal_Shdr
*symtab_hdr
;
1368 struct elf_link_hash_entry
**sym_hashes
;
1369 bfd_vma
*local_got_offsets
;
1371 Elf_Internal_Rela
*rel
;
1372 Elf_Internal_Rela
*relend
;
1375 dynobj
= elf_hash_table (info
)->dynobj
;
1376 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1377 sym_hashes
= elf_sym_hashes (input_bfd
);
1378 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1383 relend
= relocs
+ input_section
->reloc_count
;
1384 for (; rel
< relend
; rel
++, i
++)
1387 reloc_howto_type
*howto
;
1388 unsigned long r_symndx
;
1389 struct elf_link_hash_entry
*h
;
1390 Elf_Internal_Sym
*sym
;
1392 bfd_vma relocation
= 0;
1393 bfd_boolean unresolved_reloc
;
1394 bfd_reloc_status_type r
;
1397 r_type
= ELF32_R_TYPE (rel
->r_info
);
1398 if (r_type
< 0 || r_type
>= 243)
1400 bfd_set_error (bfd_error_bad_value
);
1404 if (r_type
== R_BFIN_GNU_VTENTRY
1405 || r_type
== R_BFIN_GNU_VTINHERIT
)
1408 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
1411 bfd_set_error (bfd_error_bad_value
);
1414 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1419 unresolved_reloc
= FALSE
;
1421 if (r_symndx
< symtab_hdr
->sh_info
)
1423 sym
= local_syms
+ r_symndx
;
1424 sec
= local_sections
[r_symndx
];
1425 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1429 bfd_boolean warned
, ignored
;
1431 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1432 r_symndx
, symtab_hdr
, sym_hashes
,
1434 unresolved_reloc
, warned
, ignored
);
1437 if (sec
!= NULL
&& discarded_section (sec
))
1438 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1439 rel
, 1, relend
, howto
, 0, contents
);
1441 if (bfd_link_relocatable (info
))
1444 address
= rel
->r_offset
;
1446 /* Then, process normally. */
1449 case R_BFIN_GNU_VTINHERIT
:
1450 case R_BFIN_GNU_VTENTRY
:
1451 return bfd_reloc_ok
;
1454 /* Relocation is to the address of the entry for this symbol
1455 in the global offset table. */
1457 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1460 /* Relocation is the offset of the entry for this symbol in
1461 the global offset table. */
1468 /* Create the .got section. */
1469 elf_hash_table (info
)->dynobj
= dynobj
= output_bfd
;
1470 if (!_bfd_elf_create_got_section (dynobj
, info
))
1474 sgot
= elf_hash_table (info
)->sgot
;
1475 BFD_ASSERT (sgot
!= NULL
);
1481 off
= h
->got
.offset
;
1482 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1483 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
1485 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1486 bfd_link_pic (info
),
1488 || (bfd_link_pic (info
)
1494 /* This is actually a static link, or it is a
1495 -Bsymbolic link and the symbol is defined
1496 locally, or the symbol was forced to be local
1497 because of a version file.. We must initialize
1498 this entry in the global offset table. Since
1499 the offset must always be a multiple of 4, we
1500 use the least significant bit to record whether
1501 we have initialized it already.
1503 When doing a dynamic link, we create a .rela.got
1504 relocation entry to initialize the value. This
1505 is done in the finish_dynamic_symbol routine. */
1510 bfd_put_32 (output_bfd
, relocation
,
1511 sgot
->contents
+ off
);
1516 unresolved_reloc
= FALSE
;
1520 BFD_ASSERT (local_got_offsets
!= NULL
);
1521 off
= local_got_offsets
[r_symndx
];
1522 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1524 /* The offset must always be a multiple of 4. We use
1525 the least significant bit to record whether we have
1526 already generated the necessary reloc. */
1531 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1533 if (bfd_link_pic (info
))
1536 Elf_Internal_Rela outrel
;
1539 s
= elf_hash_table (info
)->srelgot
;
1540 BFD_ASSERT (s
!= NULL
);
1542 outrel
.r_offset
= (sgot
->output_section
->vma
1543 + sgot
->output_offset
+ off
);
1545 ELF32_R_INFO (0, R_BFIN_PCREL24
);
1546 outrel
.r_addend
= relocation
;
1549 s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1550 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1553 local_got_offsets
[r_symndx
] |= 1;
1557 relocation
= sgot
->output_offset
+ off
;
1559 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1566 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
1568 relocation
, rel
->r_addend
);
1573 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1574 because such sections are not SEC_ALLOC and thus ld.so will
1575 not process them. */
1576 if (unresolved_reloc
1577 && !((input_section
->flags
& SEC_DEBUGGING
) != 0 && h
->def_dynamic
)
1578 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1579 rel
->r_offset
) != (bfd_vma
) -1)
1582 /* xgettext:c-format */
1583 (_("%pB(%pA+%#" PRIx64
"): "
1584 "unresolvable relocation against symbol `%s'"),
1585 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
1586 h
->root
.root
.string
);
1590 if (r
!= bfd_reloc_ok
)
1595 name
= h
->root
.root
.string
;
1598 name
= bfd_elf_string_from_elf_section (input_bfd
,
1599 symtab_hdr
->sh_link
,
1604 name
= bfd_section_name (input_bfd
, sec
);
1607 if (r
== bfd_reloc_overflow
)
1608 (*info
->callbacks
->reloc_overflow
)
1609 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1610 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1614 /* xgettext:c-format */
1615 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
1616 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
1627 bfin_gc_mark_hook (asection
* sec
,
1628 struct bfd_link_info
*info
,
1629 Elf_Internal_Rela
* rel
,
1630 struct elf_link_hash_entry
*h
,
1631 Elf_Internal_Sym
* sym
)
1634 switch (ELF32_R_TYPE (rel
->r_info
))
1636 case R_BFIN_GNU_VTINHERIT
:
1637 case R_BFIN_GNU_VTENTRY
:
1641 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1644 extern const bfd_target bfin_elf32_fdpic_vec
;
1645 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1647 /* An extension of the elf hash table data structure,
1648 containing some additional Blackfin-specific data. */
1649 struct bfinfdpic_elf_link_hash_table
1651 struct elf_link_hash_table elf
;
1653 /* A pointer to the .rofixup section. */
1654 asection
*sgotfixup
;
1655 /* GOT base offset. */
1657 /* Location of the first non-lazy PLT entry, i.e., the number of
1658 bytes taken by lazy PLT entries. */
1660 /* A hash table holding information about which symbols were
1661 referenced with which PIC-related relocations. */
1662 struct htab
*relocs_info
;
1663 /* Summary reloc information collected by
1664 _bfinfdpic_count_got_plt_entries. */
1665 struct _bfinfdpic_dynamic_got_info
*g
;
1668 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1670 #define bfinfdpic_hash_table(info) \
1671 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1672 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1674 #define bfinfdpic_got_section(info) \
1675 (bfinfdpic_hash_table (info)->elf.sgot)
1676 #define bfinfdpic_gotrel_section(info) \
1677 (bfinfdpic_hash_table (info)->elf.srelgot)
1678 #define bfinfdpic_gotfixup_section(info) \
1679 (bfinfdpic_hash_table (info)->sgotfixup)
1680 #define bfinfdpic_plt_section(info) \
1681 (bfinfdpic_hash_table (info)->elf.splt)
1682 #define bfinfdpic_pltrel_section(info) \
1683 (bfinfdpic_hash_table (info)->elf.srelplt)
1684 #define bfinfdpic_relocs_info(info) \
1685 (bfinfdpic_hash_table (info)->relocs_info)
1686 #define bfinfdpic_got_initial_offset(info) \
1687 (bfinfdpic_hash_table (info)->got0)
1688 #define bfinfdpic_plt_initial_offset(info) \
1689 (bfinfdpic_hash_table (info)->plt0)
1690 #define bfinfdpic_dynamic_got_plt_info(info) \
1691 (bfinfdpic_hash_table (info)->g)
1693 /* The name of the dynamic interpreter. This is put in the .interp
1696 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1698 #define DEFAULT_STACK_SIZE 0x20000
1700 /* This structure is used to collect the number of entries present in
1701 each addressable range of the got. */
1702 struct _bfinfdpic_dynamic_got_info
1704 /* Several bits of information about the current link. */
1705 struct bfd_link_info
*info
;
1706 /* Total size needed for GOT entries within the 18- or 32-bit
1708 bfd_vma got17m4
, gothilo
;
1709 /* Total size needed for function descriptor entries within the 18-
1710 or 32-bit ranges. */
1711 bfd_vma fd17m4
, fdhilo
;
1712 /* Total size needed function descriptor entries referenced in PLT
1713 entries, that would be profitable to place in offsets close to
1714 the PIC register. */
1716 /* Total size needed by lazy PLT entries. */
1718 /* Number of relocations carried over from input object files. */
1719 unsigned long relocs
;
1720 /* Number of fixups introduced by relocations in input object files. */
1721 unsigned long fixups
;
1724 /* Create a Blackfin ELF linker hash table. */
1726 static struct bfd_link_hash_table
*
1727 bfinfdpic_elf_link_hash_table_create (bfd
*abfd
)
1729 struct bfinfdpic_elf_link_hash_table
*ret
;
1730 bfd_size_type amt
= sizeof (struct bfinfdpic_elf_link_hash_table
);
1732 ret
= bfd_zmalloc (amt
);
1736 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1737 _bfd_elf_link_hash_newfunc
,
1738 sizeof (struct elf_link_hash_entry
),
1745 return &ret
->elf
.root
;
1748 /* Decide whether a reference to a symbol can be resolved locally or
1749 not. If the symbol is protected, we want the local address, but
1750 its function descriptor must be assigned by the dynamic linker. */
1751 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1752 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1753 || ! elf_hash_table (INFO)->dynamic_sections_created)
1754 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1755 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1757 /* This structure collects information on what kind of GOT, PLT or
1758 function descriptors are required by relocations that reference a
1760 struct bfinfdpic_relocs_info
1762 /* The index of the symbol, as stored in the relocation r_info, if
1763 we have a local symbol; -1 otherwise. */
1767 /* The input bfd in which the symbol is defined, if it's a local
1770 /* If symndx == -1, the hash table entry corresponding to a global
1771 symbol (even if it turns out to bind locally, in which case it
1772 should ideally be replaced with section's symndx + addend). */
1773 struct elf_link_hash_entry
*h
;
1775 /* The addend of the relocation that references the symbol. */
1778 /* The fields above are used to identify an entry. The fields below
1779 contain information on how an entry is used and, later on, which
1780 locations it was assigned. */
1781 /* The following 2 fields record whether the symbol+addend above was
1782 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1783 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1786 /* Whether a FUNCDESC relocation references symbol+addend. */
1788 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1791 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1792 unsigned fdgoff17m4
;
1793 unsigned fdgoffhilo
;
1794 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1795 GOTOFFHI relocations. The addend doesn't really matter, since we
1796 envision that this will only be used to check whether the symbol
1797 is mapped to the same segment as the got. */
1799 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1801 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1804 /* Whether we need a PLT entry for a symbol. Should be implied by
1806 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1808 /* Whether a function descriptor should be created in this link unit
1809 for symbol+addend. Should be implied by something like:
1810 (plt || fdgotoff17m4 || fdgotofflohi
1811 || ((fd || fdgot17m4 || fdgothilo)
1812 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1814 /* Whether a lazy PLT entry is needed for this symbol+addend.
1815 Should be implied by something like:
1816 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1817 && ! (info->flags & DF_BIND_NOW)) */
1819 /* Whether we've already emitted GOT relocations and PLT entries as
1820 needed for this symbol. */
1823 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1824 relocations referencing the symbol. */
1825 unsigned relocs32
, relocsfd
, relocsfdv
;
1827 /* The number of .rofixups entries and dynamic relocations allocated
1828 for this symbol, minus any that might have already been used. */
1829 unsigned fixups
, dynrelocs
;
1831 /* The offsets of the GOT entries assigned to symbol+addend, to the
1832 function descriptor's address, and to a function descriptor,
1833 respectively. Should be zero if unassigned. The offsets are
1834 counted from the value that will be assigned to the PIC register,
1835 not from the beginning of the .got section. */
1836 bfd_signed_vma got_entry
, fdgot_entry
, fd_entry
;
1837 /* The offsets of the PLT entries assigned to symbol+addend,
1838 non-lazy and lazy, respectively. If unassigned, should be
1840 bfd_vma plt_entry
, lzplt_entry
;
1843 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1845 bfinfdpic_relocs_info_hash (const void *entry_
)
1847 const struct bfinfdpic_relocs_info
*entry
= entry_
;
1849 return (entry
->symndx
== -1
1850 ? (long) entry
->d
.h
->root
.root
.hash
1851 : entry
->symndx
+ (long) entry
->d
.abfd
->id
* 257) + entry
->addend
;
1854 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1857 bfinfdpic_relocs_info_eq (const void *entry1
, const void *entry2
)
1859 const struct bfinfdpic_relocs_info
*e1
= entry1
;
1860 const struct bfinfdpic_relocs_info
*e2
= entry2
;
1862 return e1
->symndx
== e2
->symndx
&& e1
->addend
== e2
->addend
1863 && (e1
->symndx
== -1 ? e1
->d
.h
== e2
->d
.h
: e1
->d
.abfd
== e2
->d
.abfd
);
1866 /* Find or create an entry in a hash table HT that matches the key
1867 fields of the given ENTRY. If it's not found, memory for a new
1868 entry is allocated in ABFD's obstack. */
1869 static struct bfinfdpic_relocs_info
*
1870 bfinfdpic_relocs_info_find (struct htab
*ht
,
1872 const struct bfinfdpic_relocs_info
*entry
,
1873 enum insert_option insert
)
1875 struct bfinfdpic_relocs_info
**loc
;
1880 loc
= (struct bfinfdpic_relocs_info
**) htab_find_slot (ht
, entry
, insert
);
1888 *loc
= bfd_zalloc (abfd
, sizeof (**loc
));
1893 (*loc
)->symndx
= entry
->symndx
;
1894 (*loc
)->d
= entry
->d
;
1895 (*loc
)->addend
= entry
->addend
;
1896 (*loc
)->plt_entry
= (bfd_vma
)-1;
1897 (*loc
)->lzplt_entry
= (bfd_vma
)-1;
1902 /* Obtain the address of the entry in HT associated with H's symbol +
1903 addend, creating a new entry if none existed. ABFD is only used
1904 for memory allocation purposes. */
1905 inline static struct bfinfdpic_relocs_info
*
1906 bfinfdpic_relocs_info_for_global (struct htab
*ht
,
1908 struct elf_link_hash_entry
*h
,
1910 enum insert_option insert
)
1912 struct bfinfdpic_relocs_info entry
;
1916 entry
.addend
= addend
;
1918 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1921 /* Obtain the address of the entry in HT associated with the SYMNDXth
1922 local symbol of the input bfd ABFD, plus the addend, creating a new
1923 entry if none existed. */
1924 inline static struct bfinfdpic_relocs_info
*
1925 bfinfdpic_relocs_info_for_local (struct htab
*ht
,
1929 enum insert_option insert
)
1931 struct bfinfdpic_relocs_info entry
;
1933 entry
.symndx
= symndx
;
1934 entry
.d
.abfd
= abfd
;
1935 entry
.addend
= addend
;
1937 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1940 /* Merge fields set by check_relocs() of two entries that end up being
1941 mapped to the same (presumably global) symbol. */
1944 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info
*e2
,
1945 struct bfinfdpic_relocs_info
const *e1
)
1947 e2
->got17m4
|= e1
->got17m4
;
1948 e2
->gothilo
|= e1
->gothilo
;
1950 e2
->fdgot17m4
|= e1
->fdgot17m4
;
1951 e2
->fdgothilo
|= e1
->fdgothilo
;
1952 e2
->fdgoff17m4
|= e1
->fdgoff17m4
;
1953 e2
->fdgoffhilo
|= e1
->fdgoffhilo
;
1954 e2
->gotoff
|= e1
->gotoff
;
1955 e2
->call
|= e1
->call
;
1959 /* Every block of 65535 lazy PLT entries shares a single call to the
1960 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1961 32767, counting from 0). All other lazy PLT entries branch to it
1962 in a single instruction. */
1964 #define LZPLT_RESOLVER_EXTRA 10
1965 #define LZPLT_NORMAL_SIZE 6
1966 #define LZPLT_ENTRIES 1362
1968 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1969 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1971 /* Add a dynamic relocation to the SRELOC section. */
1973 inline static bfd_vma
1974 _bfinfdpic_add_dyn_reloc (bfd
*output_bfd
, asection
*sreloc
, bfd_vma offset
,
1975 int reloc_type
, long dynindx
, bfd_vma addend
,
1976 struct bfinfdpic_relocs_info
*entry
)
1978 Elf_Internal_Rela outrel
;
1979 bfd_vma reloc_offset
;
1981 outrel
.r_offset
= offset
;
1982 outrel
.r_info
= ELF32_R_INFO (dynindx
, reloc_type
);
1983 outrel
.r_addend
= addend
;
1985 reloc_offset
= sreloc
->reloc_count
* sizeof (Elf32_External_Rel
);
1986 BFD_ASSERT (reloc_offset
< sreloc
->size
);
1987 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1988 sreloc
->contents
+ reloc_offset
);
1989 sreloc
->reloc_count
++;
1991 /* If the entry's index is zero, this relocation was probably to a
1992 linkonce section that got discarded. We reserved a dynamic
1993 relocation, but it was for another entry than the one we got at
1994 the time of emitting the relocation. Unfortunately there's no
1995 simple way for us to catch this situation, since the relocation
1996 is cleared right before calling relocate_section, at which point
1997 we no longer know what the relocation used to point to. */
2000 BFD_ASSERT (entry
->dynrelocs
> 0);
2004 return reloc_offset
;
2007 /* Add a fixup to the ROFIXUP section. */
2010 _bfinfdpic_add_rofixup (bfd
*output_bfd
, asection
*rofixup
, bfd_vma offset
,
2011 struct bfinfdpic_relocs_info
*entry
)
2013 bfd_vma fixup_offset
;
2015 if (rofixup
->flags
& SEC_EXCLUDE
)
2018 fixup_offset
= rofixup
->reloc_count
* 4;
2019 if (rofixup
->contents
)
2021 BFD_ASSERT (fixup_offset
< rofixup
->size
);
2022 bfd_put_32 (output_bfd
, offset
, rofixup
->contents
+ fixup_offset
);
2024 rofixup
->reloc_count
++;
2026 if (entry
&& entry
->symndx
)
2028 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2030 BFD_ASSERT (entry
->fixups
> 0);
2034 return fixup_offset
;
2037 /* Find the segment number in which OSEC, and output section, is
2041 _bfinfdpic_osec_to_segment (bfd
*output_bfd
, asection
*osec
)
2043 Elf_Internal_Phdr
*p
= _bfd_elf_find_segment_containing_section (output_bfd
, osec
);
2045 return (p
!= NULL
) ? p
- elf_tdata (output_bfd
)->phdr
: -1;
2048 inline static bfd_boolean
2049 _bfinfdpic_osec_readonly_p (bfd
*output_bfd
, asection
*osec
)
2051 unsigned seg
= _bfinfdpic_osec_to_segment (output_bfd
, osec
);
2053 return ! (elf_tdata (output_bfd
)->phdr
[seg
].p_flags
& PF_W
);
2056 /* Generate relocations for GOT entries, function descriptors, and
2057 code for PLT and lazy PLT entries. */
2059 inline static bfd_boolean
2060 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info
*entry
,
2062 struct bfd_link_info
*info
,
2064 Elf_Internal_Sym
*sym
,
2067 bfd_vma fd_lazy_rel_offset
= (bfd_vma
) -1;
2074 if (entry
->got_entry
|| entry
->fdgot_entry
|| entry
->fd_entry
)
2076 /* If the symbol is dynamic, consider it for dynamic
2077 relocations, otherwise decay to section + offset. */
2078 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1)
2079 dynindx
= entry
->d
.h
->dynindx
;
2083 && sec
->output_section
2084 && ! bfd_is_abs_section (sec
->output_section
)
2085 && ! bfd_is_und_section (sec
->output_section
))
2086 dynindx
= elf_section_data (sec
->output_section
)->dynindx
;
2092 /* Generate relocation for GOT entry pointing to the symbol. */
2093 if (entry
->got_entry
)
2096 bfd_vma ad
= addend
;
2098 /* If the symbol is dynamic but binds locally, use
2100 if (sec
&& (entry
->symndx
!= -1
2101 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2103 if (entry
->symndx
== -1)
2104 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2106 ad
+= sym
->st_value
;
2107 ad
+= sec
->output_offset
;
2108 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2109 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2114 /* If we're linking an executable at a fixed address, we can
2115 omit the dynamic relocation as long as the symbol is local to
2117 if (bfd_link_pde (info
)
2118 && (entry
->symndx
!= -1
2119 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2122 ad
+= sec
->output_section
->vma
;
2123 if (entry
->symndx
!= -1
2124 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2125 _bfinfdpic_add_rofixup (output_bfd
,
2126 bfinfdpic_gotfixup_section (info
),
2127 bfinfdpic_got_section (info
)->output_section
2129 + bfinfdpic_got_section (info
)->output_offset
2130 + bfinfdpic_got_initial_offset (info
)
2131 + entry
->got_entry
, entry
);
2134 _bfinfdpic_add_dyn_reloc (output_bfd
, bfinfdpic_gotrel_section (info
),
2135 _bfd_elf_section_offset
2137 bfinfdpic_got_section (info
),
2138 bfinfdpic_got_initial_offset (info
)
2140 + bfinfdpic_got_section (info
)
2141 ->output_section
->vma
2142 + bfinfdpic_got_section (info
)->output_offset
,
2143 R_BFIN_BYTE4_DATA
, idx
, ad
, entry
);
2145 bfd_put_32 (output_bfd
, ad
,
2146 bfinfdpic_got_section (info
)->contents
2147 + bfinfdpic_got_initial_offset (info
)
2148 + entry
->got_entry
);
2151 /* Generate relocation for GOT entry pointing to a canonical
2152 function descriptor. */
2153 if (entry
->fdgot_entry
)
2158 if (! (entry
->symndx
== -1
2159 && entry
->d
.h
->root
.type
== bfd_link_hash_undefweak
2160 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2162 /* If the symbol is dynamic and there may be dynamic symbol
2163 resolution because we are, or are linked with, a shared
2164 library, emit a FUNCDESC relocation such that the dynamic
2165 linker will allocate the function descriptor. If the
2166 symbol needs a non-local function descriptor but binds
2167 locally (e.g., its visibility is protected, emit a
2168 dynamic relocation decayed to section+offset. */
2169 if (entry
->symndx
== -1
2170 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)
2171 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)
2172 && !bfd_link_pde (info
))
2174 reloc
= R_BFIN_FUNCDESC
;
2175 idx
= elf_section_data (entry
->d
.h
->root
.u
.def
.section
2176 ->output_section
)->dynindx
;
2177 ad
= entry
->d
.h
->root
.u
.def
.section
->output_offset
2178 + entry
->d
.h
->root
.u
.def
.value
;
2180 else if (entry
->symndx
== -1
2181 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
))
2183 reloc
= R_BFIN_FUNCDESC
;
2191 /* Otherwise, we know we have a private function descriptor,
2192 so reference it directly. */
2193 if (elf_hash_table (info
)->dynamic_sections_created
)
2194 BFD_ASSERT (entry
->privfd
);
2195 reloc
= R_BFIN_BYTE4_DATA
;
2196 idx
= elf_section_data (bfinfdpic_got_section (info
)
2197 ->output_section
)->dynindx
;
2198 ad
= bfinfdpic_got_section (info
)->output_offset
2199 + bfinfdpic_got_initial_offset (info
) + entry
->fd_entry
;
2202 /* If there is room for dynamic symbol resolution, emit the
2203 dynamic relocation. However, if we're linking an
2204 executable at a fixed location, we won't have emitted a
2205 dynamic symbol entry for the got section, so idx will be
2206 zero, which means we can and should compute the address
2207 of the private descriptor ourselves. */
2208 if (bfd_link_pde (info
)
2209 && (entry
->symndx
!= -1
2210 || BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)))
2212 ad
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2213 _bfinfdpic_add_rofixup (output_bfd
,
2214 bfinfdpic_gotfixup_section (info
),
2215 bfinfdpic_got_section (info
)
2216 ->output_section
->vma
2217 + bfinfdpic_got_section (info
)
2219 + bfinfdpic_got_initial_offset (info
)
2220 + entry
->fdgot_entry
, entry
);
2223 _bfinfdpic_add_dyn_reloc (output_bfd
,
2224 bfinfdpic_gotrel_section (info
),
2225 _bfd_elf_section_offset
2227 bfinfdpic_got_section (info
),
2228 bfinfdpic_got_initial_offset (info
)
2229 + entry
->fdgot_entry
)
2230 + bfinfdpic_got_section (info
)
2231 ->output_section
->vma
2232 + bfinfdpic_got_section (info
)
2234 reloc
, idx
, ad
, entry
);
2237 bfd_put_32 (output_bfd
, ad
,
2238 bfinfdpic_got_section (info
)->contents
2239 + bfinfdpic_got_initial_offset (info
)
2240 + entry
->fdgot_entry
);
2243 /* Generate relocation to fill in a private function descriptor in
2245 if (entry
->fd_entry
)
2248 bfd_vma ad
= addend
;
2250 long lowword
, highword
;
2252 /* If the symbol is dynamic but binds locally, use
2254 if (sec
&& (entry
->symndx
!= -1
2255 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2257 if (entry
->symndx
== -1)
2258 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2260 ad
+= sym
->st_value
;
2261 ad
+= sec
->output_offset
;
2262 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2263 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2268 /* If we're linking an executable at a fixed address, we can
2269 omit the dynamic relocation as long as the symbol is local to
2271 if (bfd_link_pde (info
)
2272 && (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2275 ad
+= sec
->output_section
->vma
;
2277 if (entry
->symndx
!= -1
2278 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2280 _bfinfdpic_add_rofixup (output_bfd
,
2281 bfinfdpic_gotfixup_section (info
),
2282 bfinfdpic_got_section (info
)
2283 ->output_section
->vma
2284 + bfinfdpic_got_section (info
)
2286 + bfinfdpic_got_initial_offset (info
)
2287 + entry
->fd_entry
, entry
);
2288 _bfinfdpic_add_rofixup (output_bfd
,
2289 bfinfdpic_gotfixup_section (info
),
2290 bfinfdpic_got_section (info
)
2291 ->output_section
->vma
2292 + bfinfdpic_got_section (info
)
2294 + bfinfdpic_got_initial_offset (info
)
2295 + entry
->fd_entry
+ 4, entry
);
2301 = _bfinfdpic_add_dyn_reloc (output_bfd
,
2303 ? bfinfdpic_pltrel_section (info
)
2304 : bfinfdpic_gotrel_section (info
),
2305 _bfd_elf_section_offset
2307 bfinfdpic_got_section (info
),
2308 bfinfdpic_got_initial_offset (info
)
2310 + bfinfdpic_got_section (info
)
2311 ->output_section
->vma
2312 + bfinfdpic_got_section (info
)
2314 R_BFIN_FUNCDESC_VALUE
, idx
, ad
, entry
);
2317 /* If we've omitted the dynamic relocation, just emit the fixed
2318 addresses of the symbol and of the local GOT base offset. */
2319 if (bfd_link_pde (info
)
2321 && sec
->output_section
)
2324 highword
= bfinfdpic_got_section (info
)->output_section
->vma
2325 + bfinfdpic_got_section (info
)->output_offset
2326 + bfinfdpic_got_initial_offset (info
);
2328 else if (entry
->lazyplt
)
2333 fd_lazy_rel_offset
= ofst
;
2335 /* A function descriptor used for lazy or local resolving is
2336 initialized such that its high word contains the output
2337 section index in which the PLT entries are located, and
2338 the low word contains the address of the lazy PLT entry
2339 entry point, that must be within the memory region
2340 assigned to that section. */
2341 lowword
= entry
->lzplt_entry
+ 4
2342 + bfinfdpic_plt_section (info
)->output_offset
2343 + bfinfdpic_plt_section (info
)->output_section
->vma
;
2344 highword
= _bfinfdpic_osec_to_segment
2345 (output_bfd
, bfinfdpic_plt_section (info
)->output_section
);
2349 /* A function descriptor for a local function gets the index
2350 of the section. For a non-local function, it's
2354 || (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1
2355 && entry
->d
.h
->dynindx
== idx
))
2358 highword
= _bfinfdpic_osec_to_segment
2359 (output_bfd
, sec
->output_section
);
2362 bfd_put_32 (output_bfd
, lowword
,
2363 bfinfdpic_got_section (info
)->contents
2364 + bfinfdpic_got_initial_offset (info
)
2366 bfd_put_32 (output_bfd
, highword
,
2367 bfinfdpic_got_section (info
)->contents
2368 + bfinfdpic_got_initial_offset (info
)
2369 + entry
->fd_entry
+ 4);
2372 /* Generate code for the PLT entry. */
2373 if (entry
->plt_entry
!= (bfd_vma
) -1)
2375 bfd_byte
*plt_code
= bfinfdpic_plt_section (info
)->contents
2378 BFD_ASSERT (entry
->fd_entry
);
2380 /* Figure out what kind of PLT entry we need, depending on the
2381 location of the function descriptor within the GOT. */
2382 if (entry
->fd_entry
>= -(1 << (18 - 1))
2383 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
2385 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2386 bfd_put_32 (output_bfd
,
2387 0xe519 | ((entry
->fd_entry
<< 14) & 0xFFFF0000),
2389 bfd_put_32 (output_bfd
,
2390 0xe51b | (((entry
->fd_entry
+ 4) << 14) & 0xFFFF0000),
2396 /* P1.L = fd_entry; P1.H = fd_entry;
2400 bfd_put_32 (output_bfd
,
2401 0xe109 | (entry
->fd_entry
<< 16),
2403 bfd_put_32 (output_bfd
,
2404 0xe149 | (entry
->fd_entry
& 0xFFFF0000),
2406 bfd_put_16 (output_bfd
, 0x5ad9, plt_code
+ 8);
2407 bfd_put_16 (output_bfd
, 0x9159, plt_code
+ 10);
2408 bfd_put_16 (output_bfd
, 0xac5b, plt_code
+ 12);
2412 bfd_put_16 (output_bfd
, 0x0051, plt_code
);
2415 /* Generate code for the lazy PLT entry. */
2416 if (entry
->lzplt_entry
!= (bfd_vma
) -1)
2418 bfd_byte
*lzplt_code
= bfinfdpic_plt_section (info
)->contents
2419 + entry
->lzplt_entry
;
2420 bfd_vma resolverStub_addr
;
2422 bfd_put_32 (output_bfd
, fd_lazy_rel_offset
, lzplt_code
);
2425 resolverStub_addr
= entry
->lzplt_entry
/ BFINFDPIC_LZPLT_BLOCK_SIZE
2426 * BFINFDPIC_LZPLT_BLOCK_SIZE
+ BFINFDPIC_LZPLT_RESOLV_LOC
;
2427 if (resolverStub_addr
>= bfinfdpic_plt_initial_offset (info
))
2428 resolverStub_addr
= bfinfdpic_plt_initial_offset (info
) - LZPLT_NORMAL_SIZE
- LZPLT_RESOLVER_EXTRA
;
2430 if (entry
->lzplt_entry
== resolverStub_addr
)
2432 /* This is a lazy PLT entry that includes a resolver call.
2436 bfd_put_32 (output_bfd
,
2439 bfd_put_16 (output_bfd
, 0x0052, lzplt_code
+ 4);
2443 /* JUMP.S resolverStub */
2444 bfd_put_16 (output_bfd
,
2446 | (((resolverStub_addr
- entry
->lzplt_entry
)
2447 / 2) & (((bfd_vma
)1 << 12) - 1)),
2455 /* Relocate an Blackfin ELF section.
2457 The RELOCATE_SECTION function is called by the new ELF backend linker
2458 to handle the relocations for a section.
2460 The relocs are always passed as Rela structures; if the section
2461 actually uses Rel structures, the r_addend field will always be
2464 This function is responsible for adjusting the section contents as
2465 necessary, and (if using Rela relocs and generating a relocatable
2466 output file) adjusting the reloc addend as necessary.
2468 This function does not have to worry about setting the reloc
2469 address or the reloc symbol index.
2471 LOCAL_SYMS is a pointer to the swapped in local symbols.
2473 LOCAL_SECTIONS is an array giving the section in the input file
2474 corresponding to the st_shndx field of each local symbol.
2476 The global hash table entry for the global symbols can be found
2477 via elf_sym_hashes (input_bfd).
2479 When generating relocatable output, this function must handle
2480 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2481 going to be the section symbol corresponding to the output
2482 section, which means that the addend must be adjusted
2486 bfinfdpic_relocate_section (bfd
* output_bfd
,
2487 struct bfd_link_info
*info
,
2489 asection
* input_section
,
2490 bfd_byte
* contents
,
2491 Elf_Internal_Rela
* relocs
,
2492 Elf_Internal_Sym
* local_syms
,
2493 asection
** local_sections
)
2495 Elf_Internal_Shdr
*symtab_hdr
;
2496 struct elf_link_hash_entry
**sym_hashes
;
2497 Elf_Internal_Rela
*rel
;
2498 Elf_Internal_Rela
*relend
;
2499 unsigned isec_segment
, got_segment
, plt_segment
,
2501 int silence_segment_error
= !bfd_link_pic (info
);
2503 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
2504 sym_hashes
= elf_sym_hashes (input_bfd
);
2505 relend
= relocs
+ input_section
->reloc_count
;
2507 isec_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2508 input_section
->output_section
);
2509 if (IS_FDPIC (output_bfd
) && bfinfdpic_got_section (info
))
2510 got_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2511 bfinfdpic_got_section (info
)
2515 if (IS_FDPIC (output_bfd
) && elf_hash_table (info
)->dynamic_sections_created
)
2516 plt_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2517 bfinfdpic_plt_section (info
)
2522 for (rel
= relocs
; rel
< relend
; rel
++)
2524 reloc_howto_type
*howto
;
2525 unsigned long r_symndx
;
2526 Elf_Internal_Sym
*sym
;
2528 struct elf_link_hash_entry
*h
;
2530 bfd_reloc_status_type r
;
2531 const char * name
= NULL
;
2534 struct bfinfdpic_relocs_info
*picrel
;
2535 bfd_vma orig_addend
= rel
->r_addend
;
2537 r_type
= ELF32_R_TYPE (rel
->r_info
);
2539 if (r_type
== R_BFIN_GNU_VTINHERIT
2540 || r_type
== R_BFIN_GNU_VTENTRY
)
2543 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2544 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2547 bfd_set_error (bfd_error_bad_value
);
2555 if (r_symndx
< symtab_hdr
->sh_info
)
2557 sym
= local_syms
+ r_symndx
;
2558 osec
= sec
= local_sections
[r_symndx
];
2559 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2561 name
= bfd_elf_string_from_elf_section
2562 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
2563 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
2567 bfd_boolean warned
, ignored
;
2568 bfd_boolean unresolved_reloc
;
2570 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2571 r_symndx
, symtab_hdr
, sym_hashes
,
2573 unresolved_reloc
, warned
, ignored
);
2577 if (sec
!= NULL
&& discarded_section (sec
))
2578 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2579 rel
, 1, relend
, howto
, 0, contents
);
2581 if (bfd_link_relocatable (info
))
2585 && (h
->root
.type
== bfd_link_hash_defined
2586 || h
->root
.type
== bfd_link_hash_defweak
)
2587 && !BFINFDPIC_SYM_LOCAL (info
, h
))
2595 case R_BFIN_PCREL24
:
2596 case R_BFIN_PCREL24_JUMP_L
:
2597 case R_BFIN_BYTE4_DATA
:
2598 if (! IS_FDPIC (output_bfd
))
2602 case R_BFIN_GOT17M4
:
2605 case R_BFIN_FUNCDESC_GOT17M4
:
2606 case R_BFIN_FUNCDESC_GOTHI
:
2607 case R_BFIN_FUNCDESC_GOTLO
:
2608 case R_BFIN_GOTOFF17M4
:
2609 case R_BFIN_GOTOFFHI
:
2610 case R_BFIN_GOTOFFLO
:
2611 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2612 case R_BFIN_FUNCDESC_GOTOFFHI
:
2613 case R_BFIN_FUNCDESC_GOTOFFLO
:
2614 case R_BFIN_FUNCDESC
:
2615 case R_BFIN_FUNCDESC_VALUE
:
2617 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2618 (info
), input_bfd
, h
,
2619 orig_addend
, INSERT
);
2621 /* In order to find the entry we created before, we must
2622 use the original addend, not the one that may have been
2623 modified by _bfd_elf_rela_local_sym(). */
2624 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2625 (info
), input_bfd
, r_symndx
,
2626 orig_addend
, INSERT
);
2630 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel
, output_bfd
, info
,
2635 /* xgettext:c-format */
2636 (_("%pB: relocation at `%pA+%#" PRIx64
"' "
2637 "references symbol `%s' with nonzero addend"),
2638 input_bfd
, input_section
, (uint64_t) rel
->r_offset
, name
);
2648 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2649 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2650 rel
->r_offset
) != (bfd_vma
) -1)
2652 info
->callbacks
->warning
2653 (info
, _("relocation references symbol not defined in the module"),
2654 name
, input_bfd
, input_section
, rel
->r_offset
);
2662 case R_BFIN_PCREL24
:
2663 case R_BFIN_PCREL24_JUMP_L
:
2664 check_segment
[0] = isec_segment
;
2665 if (! IS_FDPIC (output_bfd
))
2666 check_segment
[1] = isec_segment
;
2667 else if (picrel
->plt
)
2669 relocation
= bfinfdpic_plt_section (info
)->output_section
->vma
2670 + bfinfdpic_plt_section (info
)->output_offset
2671 + picrel
->plt_entry
;
2672 check_segment
[1] = plt_segment
;
2674 /* We don't want to warn on calls to undefined weak symbols,
2675 as calls to them must be protected by non-NULL tests
2676 anyway, and unprotected calls would invoke undefined
2678 else if (picrel
->symndx
== -1
2679 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefweak
)
2680 check_segment
[1] = check_segment
[0];
2682 check_segment
[1] = sec
2683 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2687 case R_BFIN_GOT17M4
:
2690 relocation
= picrel
->got_entry
;
2691 check_segment
[0] = check_segment
[1] = got_segment
;
2694 case R_BFIN_FUNCDESC_GOT17M4
:
2695 case R_BFIN_FUNCDESC_GOTHI
:
2696 case R_BFIN_FUNCDESC_GOTLO
:
2697 relocation
= picrel
->fdgot_entry
;
2698 check_segment
[0] = check_segment
[1] = got_segment
;
2701 case R_BFIN_GOTOFFHI
:
2702 case R_BFIN_GOTOFF17M4
:
2703 case R_BFIN_GOTOFFLO
:
2704 relocation
-= bfinfdpic_got_section (info
)->output_section
->vma
2705 + bfinfdpic_got_section (info
)->output_offset
2706 + bfinfdpic_got_initial_offset (info
);
2707 check_segment
[0] = got_segment
;
2708 check_segment
[1] = sec
2709 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2713 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2714 case R_BFIN_FUNCDESC_GOTOFFHI
:
2715 case R_BFIN_FUNCDESC_GOTOFFLO
:
2716 relocation
= picrel
->fd_entry
;
2717 check_segment
[0] = check_segment
[1] = got_segment
;
2720 case R_BFIN_FUNCDESC
:
2723 bfd_vma addend
= rel
->r_addend
;
2725 if (! (h
&& h
->root
.type
== bfd_link_hash_undefweak
2726 && BFINFDPIC_SYM_LOCAL (info
, h
)))
2728 /* If the symbol is dynamic and there may be dynamic
2729 symbol resolution because we are or are linked with a
2730 shared library, emit a FUNCDESC relocation such that
2731 the dynamic linker will allocate the function
2732 descriptor. If the symbol needs a non-local function
2733 descriptor but binds locally (e.g., its visibility is
2734 protected, emit a dynamic relocation decayed to
2736 if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
)
2737 && BFINFDPIC_SYM_LOCAL (info
, h
)
2738 && !bfd_link_pde (info
))
2740 dynindx
= elf_section_data (h
->root
.u
.def
.section
2741 ->output_section
)->dynindx
;
2742 addend
+= h
->root
.u
.def
.section
->output_offset
2743 + h
->root
.u
.def
.value
;
2745 else if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
))
2749 info
->callbacks
->warning
2750 (info
, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2751 name
, input_bfd
, input_section
, rel
->r_offset
);
2754 dynindx
= h
->dynindx
;
2758 /* Otherwise, we know we have a private function
2759 descriptor, so reference it directly. */
2760 BFD_ASSERT (picrel
->privfd
);
2761 r_type
= R_BFIN_BYTE4_DATA
;
2762 dynindx
= elf_section_data (bfinfdpic_got_section (info
)
2763 ->output_section
)->dynindx
;
2764 addend
= bfinfdpic_got_section (info
)->output_offset
2765 + bfinfdpic_got_initial_offset (info
)
2769 /* If there is room for dynamic symbol resolution, emit
2770 the dynamic relocation. However, if we're linking an
2771 executable at a fixed location, we won't have emitted a
2772 dynamic symbol entry for the got section, so idx will
2773 be zero, which means we can and should compute the
2774 address of the private descriptor ourselves. */
2775 if (bfd_link_pde (info
)
2776 && (!h
|| BFINFDPIC_FUNCDESC_LOCAL (info
, h
)))
2780 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2781 if ((bfd_get_section_flags (output_bfd
,
2782 input_section
->output_section
)
2783 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2785 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2789 info
->callbacks
->warning
2791 _("cannot emit fixups in read-only section"),
2792 name
, input_bfd
, input_section
, rel
->r_offset
);
2796 offset
= _bfd_elf_section_offset
2798 input_section
, rel
->r_offset
);
2800 if (offset
!= (bfd_vma
)-1)
2801 _bfinfdpic_add_rofixup (output_bfd
,
2802 bfinfdpic_gotfixup_section
2804 offset
+ input_section
2805 ->output_section
->vma
2806 + input_section
->output_offset
,
2810 else if ((bfd_get_section_flags (output_bfd
,
2811 input_section
->output_section
)
2812 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2816 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2820 info
->callbacks
->warning
2822 _("cannot emit dynamic relocations in read-only section"),
2823 name
, input_bfd
, input_section
, rel
->r_offset
);
2826 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2827 input_section
, rel
->r_offset
);
2829 if (offset
!= (bfd_vma
)-1)
2830 _bfinfdpic_add_dyn_reloc (output_bfd
,
2831 bfinfdpic_gotrel_section (info
),
2832 offset
+ input_section
2833 ->output_section
->vma
2834 + input_section
->output_offset
,
2836 dynindx
, addend
, picrel
);
2839 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2842 /* We want the addend in-place because dynamic
2843 relocations are REL. Setting relocation to it should
2844 arrange for it to be installed. */
2845 relocation
= addend
- rel
->r_addend
;
2847 check_segment
[0] = check_segment
[1] = got_segment
;
2850 case R_BFIN_BYTE4_DATA
:
2851 if (! IS_FDPIC (output_bfd
))
2853 check_segment
[0] = check_segment
[1] = -1;
2857 case R_BFIN_FUNCDESC_VALUE
:
2860 bfd_vma addend
= rel
->r_addend
;
2862 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2863 input_section
, rel
->r_offset
);
2865 /* If the symbol is dynamic but binds locally, use
2867 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2869 if (addend
&& r_type
== R_BFIN_FUNCDESC_VALUE
)
2871 info
->callbacks
->warning
2872 (info
, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2873 name
, input_bfd
, input_section
, rel
->r_offset
);
2876 dynindx
= h
->dynindx
;
2881 addend
+= h
->root
.u
.def
.value
;
2883 addend
+= sym
->st_value
;
2885 addend
+= osec
->output_offset
;
2886 if (osec
&& osec
->output_section
2887 && ! bfd_is_abs_section (osec
->output_section
)
2888 && ! bfd_is_und_section (osec
->output_section
))
2889 dynindx
= elf_section_data (osec
->output_section
)->dynindx
;
2894 /* If we're linking an executable at a fixed address, we
2895 can omit the dynamic relocation as long as the symbol
2896 is defined in the current link unit (which is implied
2897 by its output section not being NULL). */
2898 if (bfd_link_pde (info
)
2899 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2902 addend
+= osec
->output_section
->vma
;
2903 if (IS_FDPIC (input_bfd
)
2904 && (bfd_get_section_flags (output_bfd
,
2905 input_section
->output_section
)
2906 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2908 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2912 info
->callbacks
->warning
2914 _("cannot emit fixups in read-only section"),
2915 name
, input_bfd
, input_section
, rel
->r_offset
);
2918 if (!h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2920 if (offset
!= (bfd_vma
)-1)
2922 _bfinfdpic_add_rofixup (output_bfd
,
2923 bfinfdpic_gotfixup_section
2925 offset
+ input_section
2926 ->output_section
->vma
2927 + input_section
->output_offset
,
2930 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2931 _bfinfdpic_add_rofixup
2933 bfinfdpic_gotfixup_section (info
),
2934 offset
+ input_section
->output_section
->vma
2935 + input_section
->output_offset
+ 4, picrel
);
2942 if ((bfd_get_section_flags (output_bfd
,
2943 input_section
->output_section
)
2944 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2946 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2950 info
->callbacks
->warning
2952 _("cannot emit dynamic relocations in read-only section"),
2953 name
, input_bfd
, input_section
, rel
->r_offset
);
2957 if (offset
!= (bfd_vma
)-1)
2958 _bfinfdpic_add_dyn_reloc (output_bfd
,
2959 bfinfdpic_gotrel_section (info
),
2961 + input_section
->output_section
->vma
2962 + input_section
->output_offset
,
2963 r_type
, dynindx
, addend
, picrel
);
2966 addend
+= osec
->output_section
->vma
;
2967 /* We want the addend in-place because dynamic
2968 relocations are REL. Setting relocation to it
2969 should arrange for it to be installed. */
2970 relocation
= addend
- rel
->r_addend
;
2973 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2975 /* If we've omitted the dynamic relocation, just emit
2976 the fixed addresses of the symbol and of the local
2978 if (bfd_link_pde (info
)
2979 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2980 bfd_put_32 (output_bfd
,
2981 bfinfdpic_got_section (info
)->output_section
->vma
2982 + bfinfdpic_got_section (info
)->output_offset
2983 + bfinfdpic_got_initial_offset (info
),
2984 contents
+ rel
->r_offset
+ 4);
2986 /* A function descriptor used for lazy or local
2987 resolving is initialized such that its high word
2988 contains the output section index in which the
2989 PLT entries are located, and the low word
2990 contains the offset of the lazy PLT entry entry
2991 point into that section. */
2992 bfd_put_32 (output_bfd
,
2993 h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2995 : _bfinfdpic_osec_to_segment (output_bfd
,
2998 contents
+ rel
->r_offset
+ 4);
3001 check_segment
[0] = check_segment
[1] = got_segment
;
3005 check_segment
[0] = isec_segment
;
3006 check_segment
[1] = sec
3007 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
3012 if (check_segment
[0] != check_segment
[1] && IS_FDPIC (output_bfd
))
3014 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3015 in the ld testsuite. */
3016 /* This helps catch problems in GCC while we can't do more
3017 than static linking. The idea is to test whether the
3018 input file basename is crt0.o only once. */
3019 if (silence_segment_error
== 1)
3020 silence_segment_error
=
3021 (strlen (input_bfd
->filename
) == 6
3022 && filename_cmp (input_bfd
->filename
, "crt0.o") == 0)
3023 || (strlen (input_bfd
->filename
) > 6
3024 && filename_cmp (input_bfd
->filename
3025 + strlen (input_bfd
->filename
) - 7,
3029 if (!silence_segment_error
3030 /* We don't want duplicate errors for undefined
3032 && !(picrel
&& picrel
->symndx
== -1
3033 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefined
))
3034 info
->callbacks
->warning
3037 ? _("relocations between different segments are not supported")
3038 : _("warning: relocation references a different segment"),
3039 name
, input_bfd
, input_section
, rel
->r_offset
);
3040 if (!silence_segment_error
&& bfd_link_pic (info
))
3042 elf_elfheader (output_bfd
)->e_flags
|= EF_BFIN_PIC
;
3047 case R_BFIN_GOTOFFHI
:
3048 /* We need the addend to be applied before we shift the
3050 relocation
+= rel
->r_addend
;
3053 case R_BFIN_FUNCDESC_GOTHI
:
3054 case R_BFIN_FUNCDESC_GOTOFFHI
:
3059 case R_BFIN_FUNCDESC_GOTLO
:
3060 case R_BFIN_GOTOFFLO
:
3061 case R_BFIN_FUNCDESC_GOTOFFLO
:
3062 relocation
&= 0xffff;
3071 case R_BFIN_PCREL24
:
3072 case R_BFIN_PCREL24_JUMP_L
:
3073 if (! IS_FDPIC (output_bfd
) || ! picrel
->plt
)
3077 /* When referencing a GOT entry, a function descriptor or a
3078 PLT, we don't want the addend to apply to the reference,
3079 but rather to the referenced symbol. The actual entry
3080 will have already been created taking the addend into
3081 account, so cancel it out here. */
3082 case R_BFIN_GOT17M4
:
3085 case R_BFIN_FUNCDESC_GOT17M4
:
3086 case R_BFIN_FUNCDESC_GOTHI
:
3087 case R_BFIN_FUNCDESC_GOTLO
:
3088 case R_BFIN_FUNCDESC_GOTOFF17M4
:
3089 case R_BFIN_FUNCDESC_GOTOFFHI
:
3090 case R_BFIN_FUNCDESC_GOTOFFLO
:
3091 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3092 here, since we do want to apply the addend to the others.
3093 Note that we've applied the addend to GOTOFFHI before we
3094 shifted it right. */
3095 case R_BFIN_GOTOFFHI
:
3096 relocation
-= rel
->r_addend
;
3103 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
3104 contents
, rel
->r_offset
,
3105 relocation
, rel
->r_addend
);
3107 if (r
!= bfd_reloc_ok
)
3109 const char * msg
= (const char *) NULL
;
3113 case bfd_reloc_overflow
:
3114 (*info
->callbacks
->reloc_overflow
)
3115 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3116 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3119 case bfd_reloc_undefined
:
3120 (*info
->callbacks
->undefined_symbol
)
3121 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
3124 case bfd_reloc_outofrange
:
3125 msg
= _("internal error: out of range error");
3128 case bfd_reloc_notsupported
:
3129 msg
= _("internal error: unsupported relocation error");
3132 case bfd_reloc_dangerous
:
3133 msg
= _("internal error: dangerous relocation");
3137 msg
= _("internal error: unknown error");
3142 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
3143 input_section
, rel
->r_offset
);
3150 /* We need dynamic symbols for every section, since segments can
3151 relocate independently. */
3153 _bfinfdpic_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3154 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3157 switch (elf_section_data (p
)->this_hdr
.sh_type
)
3161 /* If sh_type is yet undecided, assume it could be
3162 SHT_PROGBITS/SHT_NOBITS. */
3166 /* There shouldn't be section relative relocations
3167 against any other section. */
3173 /* Create a .got section, as well as its additional info field. This
3174 is almost entirely copied from
3175 elflink.c:_bfd_elf_create_got_section(). */
3178 _bfin_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
3180 flagword flags
, pltflags
;
3182 struct elf_link_hash_entry
*h
;
3183 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3186 /* This function may be called more than once. */
3187 s
= elf_hash_table (info
)->sgot
;
3191 /* Machine specific: although pointers are 32-bits wide, we want the
3192 GOT to be aligned to a 64-bit boundary, such that function
3193 descriptors in it can be accessed with 64-bit loads and
3197 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3198 | SEC_LINKER_CREATED
);
3201 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
3202 elf_hash_table (info
)->sgot
= s
;
3204 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3207 if (bed
->want_got_sym
)
3209 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3210 (or .got.plt) section. We don't do this in the linker script
3211 because we don't want to define the symbol if we are not creating
3212 a global offset table. */
3213 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "__GLOBAL_OFFSET_TABLE_");
3214 elf_hash_table (info
)->hgot
= h
;
3218 /* Machine-specific: we want the symbol for executables as
3220 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3224 /* The first bit of the global offset table is the header. */
3225 s
->size
+= bed
->got_header_size
;
3227 /* This is the machine-specific part. Create and initialize section
3228 data for the got. */
3229 if (IS_FDPIC (abfd
))
3231 bfinfdpic_relocs_info (info
) = htab_try_create (1,
3232 bfinfdpic_relocs_info_hash
,
3233 bfinfdpic_relocs_info_eq
,
3235 if (! bfinfdpic_relocs_info (info
))
3238 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.got",
3239 (flags
| SEC_READONLY
));
3241 || ! bfd_set_section_alignment (abfd
, s
, 2))
3244 bfinfdpic_gotrel_section (info
) = s
;
3246 /* Machine-specific. */
3247 s
= bfd_make_section_anyway_with_flags (abfd
, ".rofixup",
3248 (flags
| SEC_READONLY
));
3250 || ! bfd_set_section_alignment (abfd
, s
, 2))
3253 bfinfdpic_gotfixup_section (info
) = s
;
3256 pltflags
|= SEC_CODE
;
3257 if (bed
->plt_not_loaded
)
3258 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
3259 if (bed
->plt_readonly
)
3260 pltflags
|= SEC_READONLY
;
3262 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
3264 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
3266 /* Blackfin-specific: remember it. */
3267 bfinfdpic_plt_section (info
) = s
;
3269 if (bed
->want_plt_sym
)
3271 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3273 struct bfd_link_hash_entry
*bh
= NULL
;
3275 if (! (_bfd_generic_link_add_one_symbol
3276 (info
, abfd
, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
, 0, NULL
,
3277 FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
3279 h
= (struct elf_link_hash_entry
*) bh
;
3281 h
->type
= STT_OBJECT
;
3283 if (! bfd_link_executable (info
)
3284 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3288 /* Blackfin-specific: we want rel relocations for the plt. */
3289 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.plt",
3290 flags
| SEC_READONLY
);
3292 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3294 /* Blackfin-specific: remember it. */
3295 bfinfdpic_pltrel_section (info
) = s
;
3300 /* Make sure the got and plt sections exist, and that our pointers in
3301 the link hash table point to them. */
3304 elf32_bfinfdpic_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3306 /* This is mostly copied from
3307 elflink.c:_bfd_elf_create_dynamic_sections(). */
3310 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3312 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3313 | SEC_LINKER_CREATED
);
3315 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3316 .rel[a].bss sections. */
3318 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3319 if (! _bfin_create_got_section (abfd
, info
))
3322 /* Blackfin-specific: make sure we created everything we wanted. */
3323 BFD_ASSERT (bfinfdpic_got_section (info
) && bfinfdpic_gotrel_section (info
)
3324 /* && bfinfdpic_gotfixup_section (info) */
3325 && bfinfdpic_plt_section (info
)
3326 && bfinfdpic_pltrel_section (info
));
3328 if (bed
->want_dynbss
)
3330 /* The .dynbss section is a place to put symbols which are defined
3331 by dynamic objects, are referenced by regular objects, and are
3332 not functions. We must allocate space for them in the process
3333 image and use a R_*_COPY reloc to tell the dynamic linker to
3334 initialize them at run time. The linker script puts the .dynbss
3335 section into the .bss section of the final image. */
3336 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
3337 SEC_ALLOC
| SEC_LINKER_CREATED
);
3341 /* The .rel[a].bss section holds copy relocs. This section is not
3342 normally needed. We need to create it here, though, so that the
3343 linker will map it to an output section. We can't just create it
3344 only if we need it, because we will not know whether we need it
3345 until we have seen all the input files, and the first time the
3346 main linker code calls BFD after examining all the input files
3347 (size_dynamic_sections) the input sections have already been
3348 mapped to the output sections. If the section turns out not to
3349 be needed, we can discard it later. We will never need this
3350 section when generating a shared object, since they do not use
3352 if (! bfd_link_pic (info
))
3354 s
= bfd_make_section_anyway_with_flags (abfd
,
3356 flags
| SEC_READONLY
);
3358 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3366 /* Compute the total GOT size required by each symbol in each range.
3367 Symbols may require up to 4 words in the GOT: an entry pointing to
3368 the symbol, an entry pointing to its function descriptor, and a
3369 private function descriptors taking two words. */
3372 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info
*entry
,
3373 struct _bfinfdpic_dynamic_got_info
*dinfo
)
3375 /* Allocate space for a GOT entry pointing to the symbol. */
3377 dinfo
->got17m4
+= 4;
3378 else if (entry
->gothilo
)
3379 dinfo
->gothilo
+= 4;
3384 /* Allocate space for a GOT entry pointing to the function
3386 if (entry
->fdgot17m4
)
3387 dinfo
->got17m4
+= 4;
3388 else if (entry
->fdgothilo
)
3389 dinfo
->gothilo
+= 4;
3394 /* Decide whether we need a PLT entry, a function descriptor in the
3395 GOT, and a lazy PLT entry for this symbol. */
3396 entry
->plt
= entry
->call
3397 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3398 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3399 entry
->privfd
= entry
->plt
3400 || entry
->fdgoff17m4
|| entry
->fdgoffhilo
3401 || ((entry
->fd
|| entry
->fdgot17m4
|| entry
->fdgothilo
)
3402 && (entry
->symndx
!= -1
3403 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
)));
3404 entry
->lazyplt
= entry
->privfd
3405 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3406 && ! (dinfo
->info
->flags
& DF_BIND_NOW
)
3407 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3409 /* Allocate space for a function descriptor. */
3410 if (entry
->fdgoff17m4
)
3412 else if (entry
->privfd
&& entry
->plt
)
3414 else if (entry
->privfd
)
3421 dinfo
->lzplt
+= LZPLT_NORMAL_SIZE
;
3424 /* Compute the number of dynamic relocations and fixups that a symbol
3425 requires, and add (or subtract) from the grand and per-symbol
3429 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info
*entry
,
3430 struct _bfinfdpic_dynamic_got_info
*dinfo
,
3431 bfd_boolean subtract
)
3433 bfd_vma relocs
= 0, fixups
= 0;
3435 if (!bfd_link_pde (dinfo
->info
))
3436 relocs
= entry
->relocs32
+ entry
->relocsfd
+ entry
->relocsfdv
;
3439 if (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
))
3441 if (entry
->symndx
!= -1
3442 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3443 fixups
+= entry
->relocs32
+ 2 * entry
->relocsfdv
;
3446 relocs
+= entry
->relocs32
+ entry
->relocsfdv
;
3448 if (entry
->symndx
!= -1
3449 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
))
3451 if (entry
->symndx
!= -1
3452 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3453 fixups
+= entry
->relocsfd
;
3456 relocs
+= entry
->relocsfd
;
3465 entry
->dynrelocs
+= relocs
;
3466 entry
->fixups
+= fixups
;
3467 dinfo
->relocs
+= relocs
;
3468 dinfo
->fixups
+= fixups
;
3471 /* Compute the total GOT and PLT size required by each symbol in each range. *
3472 Symbols may require up to 4 words in the GOT: an entry pointing to
3473 the symbol, an entry pointing to its function descriptor, and a
3474 private function descriptors taking two words. */
3477 _bfinfdpic_count_got_plt_entries (void **entryp
, void *dinfo_
)
3479 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3480 struct _bfinfdpic_dynamic_got_info
*dinfo
= dinfo_
;
3482 _bfinfdpic_count_nontls_entries (entry
, dinfo
);
3484 _bfinfdpic_count_relocs_fixups (entry
, dinfo
, FALSE
);
3489 /* This structure is used to assign offsets to got entries, function
3490 descriptors, plt entries and lazy plt entries. */
3492 struct _bfinfdpic_dynamic_got_plt_info
3494 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3495 struct _bfinfdpic_dynamic_got_info g
;
3497 /* For each addressable range, we record a MAX (positive) and MIN
3498 (negative) value. CUR is used to assign got entries, and it's
3499 incremented from an initial positive value to MAX, then from MIN
3500 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3501 assign function descriptors, and it's decreased from an initial
3502 non-positive value to MIN, then from MAX down to CUR (unless CUR
3503 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3504 to even words. ODD, if non-zero, indicates an odd word to be
3505 used for the next got entry, otherwise CUR is used and
3506 incremented by a pair of words, wrapping around when it reaches
3507 MAX. FDCUR is decremented (and wrapped) before the next function
3508 descriptor is chosen. FDPLT indicates the number of remaining
3509 slots that can be used for function descriptors used only by PLT
3511 struct _bfinfdpic_dynamic_got_alloc_data
3513 bfd_signed_vma max
, cur
, odd
, fdcur
, min
;
3518 /* Determine the positive and negative ranges to be used by each
3519 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3520 double-word boundary, are the minimum (negative) and maximum
3521 (positive) GOT offsets already used by previous ranges, except for
3522 an ODD entry that may have been left behind. GOT and FD indicate
3523 the size of GOT entries and function descriptors that must be
3524 placed within the range from -WRAP to WRAP. If there's room left,
3525 up to FDPLT bytes should be reserved for additional function
3528 inline static bfd_signed_vma
3529 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data
*gad
,
3530 bfd_signed_vma fdcur
,
3538 bfd_signed_vma wrapmin
= -wrap
;
3540 /* Start at the given initial points. */
3544 /* If we had an incoming odd word and we have any got entries that
3545 are going to use it, consume it, otherwise leave gad->odd at
3546 zero. We might force gad->odd to zero and return the incoming
3547 odd such that it is used by the next range, but then GOT entries
3548 might appear to be out of order and we wouldn't be able to
3549 shorten the GOT by one word if it turns out to end with an
3550 unpaired GOT entry. */
3560 /* If we're left with an unpaired GOT entry, compute its location
3561 such that we can return it. Otherwise, if got doesn't require an
3562 odd number of words here, either odd was already zero in the
3563 block above, or it was set to zero because got was non-zero, or
3564 got was already zero. In the latter case, we want the value of
3565 odd to carry over to the return statement, so we don't want to
3566 reset odd unless the condition below is true. */
3573 /* Compute the tentative boundaries of this range. */
3574 gad
->max
= cur
+ got
;
3575 gad
->min
= fdcur
- fd
;
3578 /* If function descriptors took too much space, wrap some of them
3580 if (gad
->min
< wrapmin
)
3582 gad
->max
+= wrapmin
- gad
->min
;
3585 /* If there is space left and we have function descriptors
3586 referenced in PLT entries that could take advantage of shorter
3587 offsets, place them here. */
3588 else if (fdplt
&& gad
->min
> wrapmin
)
3591 if ((bfd_vma
) (gad
->min
- wrapmin
) < fdplt
)
3592 fds
= gad
->min
- wrapmin
;
3601 /* If GOT entries took too much space, wrap some of them around.
3602 This may well cause gad->min to become lower than wrapmin. This
3603 will cause a relocation overflow later on, so we don't have to
3605 if ((bfd_vma
) gad
->max
> wrap
)
3607 gad
->min
-= gad
->max
- wrap
;
3610 /* If there is more space left, try to place some more function
3611 descriptors for PLT entries. */
3612 else if (fdplt
&& (bfd_vma
) gad
->max
< wrap
)
3615 if ((bfd_vma
) (wrap
- gad
->max
) < fdplt
)
3616 fds
= wrap
- gad
->max
;
3625 /* If odd was initially computed as an offset past the wrap point,
3628 odd
= gad
->min
+ odd
- gad
->max
;
3630 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3631 before returning, so do it here too. This guarantees that,
3632 should cur and fdcur meet at the wrap point, they'll both be
3634 if (gad
->cur
== gad
->max
)
3635 gad
->cur
= gad
->min
;
3640 /* Compute the location of the next GOT entry, given the allocation
3641 data for a range. */
3643 inline static bfd_signed_vma
3644 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3650 /* If there was an odd word left behind, use it. */
3656 /* Otherwise, use the word pointed to by cur, reserve the next
3657 as an odd word, and skip to the next pair of words, possibly
3660 gad
->odd
= gad
->cur
+ 4;
3662 if (gad
->cur
== gad
->max
)
3663 gad
->cur
= gad
->min
;
3669 /* Compute the location of the next function descriptor entry in the
3670 GOT, given the allocation data for a range. */
3672 inline static bfd_signed_vma
3673 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3675 /* If we're at the bottom, wrap around, and only then allocate the
3676 next pair of words. */
3677 if (gad
->fdcur
== gad
->min
)
3678 gad
->fdcur
= gad
->max
;
3679 return gad
->fdcur
-= 8;
3682 /* Assign GOT offsets for every GOT entry and function descriptor.
3683 Doing everything in a single pass is tricky. */
3686 _bfinfdpic_assign_got_entries (void **entryp
, void *info_
)
3688 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3689 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3692 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3693 else if (entry
->gothilo
)
3694 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3696 if (entry
->fdgot17m4
)
3697 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3698 else if (entry
->fdgothilo
)
3699 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3701 if (entry
->fdgoff17m4
)
3702 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3703 else if (entry
->plt
&& dinfo
->got17m4
.fdplt
)
3705 dinfo
->got17m4
.fdplt
-= 8;
3706 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3708 else if (entry
->plt
)
3710 dinfo
->gothilo
.fdplt
-= 8;
3711 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3713 else if (entry
->privfd
)
3714 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3719 /* Assign GOT offsets to private function descriptors used by PLT
3720 entries (or referenced by 32-bit offsets), as well as PLT entries
3721 and lazy PLT entries. */
3724 _bfinfdpic_assign_plt_entries (void **entryp
, void *info_
)
3726 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3727 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3729 /* If this symbol requires a local function descriptor, allocate
3731 if (entry
->privfd
&& entry
->fd_entry
== 0)
3733 if (dinfo
->got17m4
.fdplt
)
3735 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3736 dinfo
->got17m4
.fdplt
-= 8;
3740 BFD_ASSERT (dinfo
->gothilo
.fdplt
);
3741 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3742 dinfo
->gothilo
.fdplt
-= 8;
3750 /* We use the section's raw size to mark the location of the
3752 entry
->plt_entry
= bfinfdpic_plt_section (dinfo
->g
.info
)->size
;
3754 /* Figure out the length of this PLT entry based on the
3755 addressing mode we need to reach the function descriptor. */
3756 BFD_ASSERT (entry
->fd_entry
);
3757 if (entry
->fd_entry
>= -(1 << (18 - 1))
3758 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
3763 bfinfdpic_plt_section (dinfo
->g
.info
)->size
+= size
;
3768 entry
->lzplt_entry
= dinfo
->g
.lzplt
;
3769 dinfo
->g
.lzplt
+= LZPLT_NORMAL_SIZE
;
3770 /* If this entry is the one that gets the resolver stub, account
3771 for the additional instruction. */
3772 if (entry
->lzplt_entry
% BFINFDPIC_LZPLT_BLOCK_SIZE
3773 == BFINFDPIC_LZPLT_RESOLV_LOC
)
3774 dinfo
->g
.lzplt
+= LZPLT_RESOLVER_EXTRA
;
3780 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3781 _bfinfdpic_assign_plt_entries. */
3784 _bfinfdpic_reset_got_plt_entries (void **entryp
, void *ignore ATTRIBUTE_UNUSED
)
3786 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3788 entry
->got_entry
= 0;
3789 entry
->fdgot_entry
= 0;
3790 entry
->fd_entry
= 0;
3791 entry
->plt_entry
= (bfd_vma
)-1;
3792 entry
->lzplt_entry
= (bfd_vma
)-1;
3797 /* Follow indirect and warning hash entries so that each got entry
3798 points to the final symbol definition. P must point to a pointer
3799 to the hash table we're traversing. Since this traversal may
3800 modify the hash table, we set this pointer to NULL to indicate
3801 we've made a potentially-destructive change to the hash table, so
3802 the traversal must be restarted. */
3804 _bfinfdpic_resolve_final_relocs_info (void **entryp
, void *p
)
3806 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3809 if (entry
->symndx
== -1)
3811 struct elf_link_hash_entry
*h
= entry
->d
.h
;
3812 struct bfinfdpic_relocs_info
*oentry
;
3814 while (h
->root
.type
== bfd_link_hash_indirect
3815 || h
->root
.type
== bfd_link_hash_warning
)
3816 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
3818 if (entry
->d
.h
== h
)
3821 oentry
= bfinfdpic_relocs_info_for_global (*htab
, 0, h
, entry
->addend
,
3826 /* Merge the two entries. */
3827 bfinfdpic_pic_merge_early_relocs_info (oentry
, entry
);
3828 htab_clear_slot (*htab
, entryp
);
3834 /* If we can't find this entry with the new bfd hash, re-insert
3835 it, and get the traversal restarted. */
3836 if (! htab_find (*htab
, entry
))
3838 htab_clear_slot (*htab
, entryp
);
3839 entryp
= htab_find_slot (*htab
, entry
, INSERT
);
3842 /* Abort the traversal, since the whole table may have
3843 moved, and leave it up to the parent to restart the
3845 *(htab_t
*)p
= NULL
;
3853 /* Compute the total size of the GOT, the PLT, the dynamic relocations
3854 section and the rofixup section. Assign locations for GOT and PLT
3858 _bfinfdpic_size_got_plt (bfd
*output_bfd
,
3859 struct _bfinfdpic_dynamic_got_plt_info
*gpinfop
)
3863 struct bfd_link_info
*info
= gpinfop
->g
.info
;
3864 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
3866 memcpy (bfinfdpic_dynamic_got_plt_info (info
), &gpinfop
->g
,
3867 sizeof (gpinfop
->g
));
3870 /* Compute the total size taken by entries in the 18-bit range,
3871 to tell how many PLT function descriptors we can bring into it
3872 without causing it to overflow. */
3873 limit
= odd
+ gpinfop
->g
.got17m4
+ gpinfop
->g
.fd17m4
;
3874 if (limit
< (bfd_vma
)1 << 18)
3875 limit
= ((bfd_vma
)1 << 18) - limit
;
3878 if (gpinfop
->g
.fdplt
< limit
)
3879 limit
= gpinfop
->g
.fdplt
;
3881 /* Determine the ranges of GOT offsets that we can use for each
3882 range of addressing modes. */
3883 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->got17m4
,
3890 (bfd_vma
)1 << (18-1));
3891 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->gothilo
,
3892 gpinfop
->got17m4
.min
,
3894 gpinfop
->got17m4
.max
,
3897 gpinfop
->g
.fdplt
- gpinfop
->got17m4
.fdplt
,
3898 (bfd_vma
)1 << (32-1));
3900 /* Now assign (most) GOT offsets. */
3901 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_got_entries
,
3904 bfinfdpic_got_section (info
)->size
= gpinfop
->gothilo
.max
3905 - gpinfop
->gothilo
.min
3906 /* If an odd word is the last word of the GOT, we don't need this
3907 word to be part of the GOT. */
3908 - (odd
+ 4 == gpinfop
->gothilo
.max
? 4 : 0);
3909 if (bfinfdpic_got_section (info
)->size
== 0)
3910 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3911 else if (bfinfdpic_got_section (info
)->size
== 12
3912 && ! elf_hash_table (info
)->dynamic_sections_created
)
3914 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3915 bfinfdpic_got_section (info
)->size
= 0;
3919 bfinfdpic_got_section (info
)->contents
=
3920 (bfd_byte
*) bfd_zalloc (dynobj
,
3921 bfinfdpic_got_section (info
)->size
);
3922 if (bfinfdpic_got_section (info
)->contents
== NULL
)
3926 if (elf_hash_table (info
)->dynamic_sections_created
)
3927 /* Subtract the number of lzplt entries, since those will generate
3928 relocations in the pltrel section. */
3929 bfinfdpic_gotrel_section (info
)->size
=
3930 (gpinfop
->g
.relocs
- gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
)
3931 * get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3933 BFD_ASSERT (gpinfop
->g
.relocs
== 0);
3934 if (bfinfdpic_gotrel_section (info
)->size
== 0)
3935 bfinfdpic_gotrel_section (info
)->flags
|= SEC_EXCLUDE
;
3938 bfinfdpic_gotrel_section (info
)->contents
=
3939 (bfd_byte
*) bfd_zalloc (dynobj
,
3940 bfinfdpic_gotrel_section (info
)->size
);
3941 if (bfinfdpic_gotrel_section (info
)->contents
== NULL
)
3945 bfinfdpic_gotfixup_section (info
)->size
= (gpinfop
->g
.fixups
+ 1) * 4;
3946 if (bfinfdpic_gotfixup_section (info
)->size
== 0)
3947 bfinfdpic_gotfixup_section (info
)->flags
|= SEC_EXCLUDE
;
3950 bfinfdpic_gotfixup_section (info
)->contents
=
3951 (bfd_byte
*) bfd_zalloc (dynobj
,
3952 bfinfdpic_gotfixup_section (info
)->size
);
3953 if (bfinfdpic_gotfixup_section (info
)->contents
== NULL
)
3957 if (elf_hash_table (info
)->dynamic_sections_created
)
3958 bfinfdpic_pltrel_section (info
)->size
=
3959 gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
* get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3960 if (bfinfdpic_pltrel_section (info
)->size
== 0)
3961 bfinfdpic_pltrel_section (info
)->flags
|= SEC_EXCLUDE
;
3964 bfinfdpic_pltrel_section (info
)->contents
=
3965 (bfd_byte
*) bfd_zalloc (dynobj
,
3966 bfinfdpic_pltrel_section (info
)->size
);
3967 if (bfinfdpic_pltrel_section (info
)->contents
== NULL
)
3971 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
3972 such that there's room for the additional instruction needed to
3973 call the resolver. Since _bfinfdpic_assign_got_entries didn't
3974 account for them, our block size is 4 bytes smaller than the real
3976 if (elf_hash_table (info
)->dynamic_sections_created
)
3978 bfinfdpic_plt_section (info
)->size
= gpinfop
->g
.lzplt
3979 + ((gpinfop
->g
.lzplt
+ (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) - LZPLT_NORMAL_SIZE
)
3980 / (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) * LZPLT_RESOLVER_EXTRA
);
3983 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
3984 actually assign lazy PLT entries addresses. */
3985 gpinfop
->g
.lzplt
= 0;
3987 /* Save information that we're going to need to generate GOT and PLT
3989 bfinfdpic_got_initial_offset (info
) = -gpinfop
->gothilo
.min
;
3991 if (get_elf_backend_data (output_bfd
)->want_got_sym
)
3992 elf_hash_table (info
)->hgot
->root
.u
.def
.value
3993 = bfinfdpic_got_initial_offset (info
);
3995 if (elf_hash_table (info
)->dynamic_sections_created
)
3996 bfinfdpic_plt_initial_offset (info
) =
3997 bfinfdpic_plt_section (info
)->size
;
3999 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_plt_entries
,
4002 /* Allocate the PLT section contents only after
4003 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4004 non-lazy PLT entries. */
4005 if (bfinfdpic_plt_section (info
)->size
== 0)
4006 bfinfdpic_plt_section (info
)->flags
|= SEC_EXCLUDE
;
4009 bfinfdpic_plt_section (info
)->contents
=
4010 (bfd_byte
*) bfd_zalloc (dynobj
,
4011 bfinfdpic_plt_section (info
)->size
);
4012 if (bfinfdpic_plt_section (info
)->contents
== NULL
)
4019 /* Set the sizes of the dynamic sections. */
4022 elf32_bfinfdpic_size_dynamic_sections (bfd
*output_bfd
,
4023 struct bfd_link_info
*info
)
4025 struct elf_link_hash_table
*htab
;
4028 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4030 htab
= elf_hash_table (info
);
4031 dynobj
= htab
->dynobj
;
4032 BFD_ASSERT (dynobj
!= NULL
);
4034 if (htab
->dynamic_sections_created
)
4036 /* Set the contents of the .interp section to the interpreter. */
4037 if (bfd_link_executable (info
) && !info
->nointerp
)
4039 s
= bfd_get_linker_section (dynobj
, ".interp");
4040 BFD_ASSERT (s
!= NULL
);
4041 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
4042 s
->contents
= (bfd_byte
*) ELF_DYNAMIC_INTERPRETER
;
4046 memset (&gpinfo
, 0, sizeof (gpinfo
));
4047 gpinfo
.g
.info
= info
;
4051 htab_t relocs
= bfinfdpic_relocs_info (info
);
4053 htab_traverse (relocs
, _bfinfdpic_resolve_final_relocs_info
, &relocs
);
4055 if (relocs
== bfinfdpic_relocs_info (info
))
4059 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_count_got_plt_entries
,
4062 /* Allocate space to save the summary information, we're going to
4063 use it if we're doing relaxations. */
4064 bfinfdpic_dynamic_got_plt_info (info
) = bfd_alloc (dynobj
, sizeof (gpinfo
.g
));
4066 if (!_bfinfdpic_size_got_plt (output_bfd
, &gpinfo
))
4069 if (elf_hash_table (info
)->dynamic_sections_created
)
4071 if (bfinfdpic_got_section (info
)->size
)
4072 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTGOT
, 0))
4075 if (bfinfdpic_pltrel_section (info
)->size
)
4076 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
4077 || !_bfd_elf_add_dynamic_entry (info
, DT_PLTREL
, DT_REL
)
4078 || !_bfd_elf_add_dynamic_entry (info
, DT_JMPREL
, 0))
4081 if (bfinfdpic_gotrel_section (info
)->size
)
4082 if (!_bfd_elf_add_dynamic_entry (info
, DT_REL
, 0)
4083 || !_bfd_elf_add_dynamic_entry (info
, DT_RELSZ
, 0)
4084 || !_bfd_elf_add_dynamic_entry (info
, DT_RELENT
,
4085 sizeof (Elf32_External_Rel
)))
4089 s
= bfd_get_linker_section (dynobj
, ".dynbss");
4090 if (s
&& s
->size
== 0)
4091 s
->flags
|= SEC_EXCLUDE
;
4093 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
4094 if (s
&& s
->size
== 0)
4095 s
->flags
|= SEC_EXCLUDE
;
4101 elf32_bfinfdpic_always_size_sections (bfd
*output_bfd
,
4102 struct bfd_link_info
*info
)
4104 if (!bfd_link_relocatable (info
)
4105 && !bfd_elf_stack_segment_size (output_bfd
, info
,
4106 "__stacksize", DEFAULT_STACK_SIZE
))
4112 /* Check whether any of the relocations was optimized away, and
4113 subtract it from the relocation or fixup count. */
4115 _bfinfdpic_check_discarded_relocs (bfd
*abfd
, asection
*sec
,
4116 struct bfd_link_info
*info
,
4117 bfd_boolean
*changed
)
4119 Elf_Internal_Shdr
*symtab_hdr
;
4120 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
4121 Elf_Internal_Rela
*rel
, *erel
;
4123 if ((sec
->flags
& SEC_RELOC
) == 0
4124 || sec
->reloc_count
== 0)
4127 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4128 sym_hashes
= elf_sym_hashes (abfd
);
4129 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
4130 if (!elf_bad_symtab (abfd
))
4131 sym_hashes_end
-= symtab_hdr
->sh_info
;
4133 rel
= elf_section_data (sec
)->relocs
;
4135 /* Now examine each relocation. */
4136 for (erel
= rel
+ sec
->reloc_count
; rel
< erel
; rel
++)
4138 struct elf_link_hash_entry
*h
;
4139 unsigned long r_symndx
;
4140 struct bfinfdpic_relocs_info
*picrel
;
4141 struct _bfinfdpic_dynamic_got_info
*dinfo
;
4143 if (ELF32_R_TYPE (rel
->r_info
) != R_BFIN_BYTE4_DATA
4144 && ELF32_R_TYPE (rel
->r_info
) != R_BFIN_FUNCDESC
)
4147 if (_bfd_elf_section_offset (sec
->output_section
->owner
,
4148 info
, sec
, rel
->r_offset
)
4152 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4153 if (r_symndx
< symtab_hdr
->sh_info
)
4157 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4158 while (h
->root
.type
== bfd_link_hash_indirect
4159 || h
->root
.type
== bfd_link_hash_warning
)
4160 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
4164 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4166 rel
->r_addend
, NO_INSERT
);
4168 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info
),
4170 rel
->r_addend
, NO_INSERT
);
4176 dinfo
= bfinfdpic_dynamic_got_plt_info (info
);
4178 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, TRUE
);
4179 if (ELF32_R_TYPE (rel
->r_info
) == R_BFIN_BYTE4_DATA
)
4181 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4183 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, FALSE
);
4190 bfinfdpic_elf_discard_info (bfd
*ibfd
,
4191 struct elf_reloc_cookie
*cookie ATTRIBUTE_UNUSED
,
4192 struct bfd_link_info
*info
)
4194 bfd_boolean changed
= FALSE
;
4198 /* Account for relaxation of .eh_frame section. */
4199 for (s
= ibfd
->sections
; s
; s
= s
->next
)
4200 if (s
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4202 if (!_bfinfdpic_check_discarded_relocs (ibfd
, s
, info
, &changed
))
4204 obfd
= s
->output_section
->owner
;
4209 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4211 memset (&gpinfo
, 0, sizeof (gpinfo
));
4212 memcpy (&gpinfo
.g
, bfinfdpic_dynamic_got_plt_info (info
),
4215 /* Clear GOT and PLT assignments. */
4216 htab_traverse (bfinfdpic_relocs_info (info
),
4217 _bfinfdpic_reset_got_plt_entries
,
4220 if (!_bfinfdpic_size_got_plt (obfd
, &gpinfo
))
4228 elf32_bfinfdpic_finish_dynamic_sections (bfd
*output_bfd
,
4229 struct bfd_link_info
*info
)
4234 dynobj
= elf_hash_table (info
)->dynobj
;
4236 if (bfinfdpic_got_section (info
))
4238 BFD_ASSERT (bfinfdpic_gotrel_section (info
)->size
4239 /* PR 17334: It appears that the GOT section can end up
4240 being bigger than the number of relocs. Presumably
4241 because some relocs have been deleted. A test case has
4242 yet to be generated for verify this, but in the meantime
4243 the test below has been changed from == to >= so that
4244 applications can continue to be built. */
4245 >= (bfinfdpic_gotrel_section (info
)->reloc_count
4246 * sizeof (Elf32_External_Rel
)));
4248 if (bfinfdpic_gotfixup_section (info
))
4250 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
4251 bfd_vma got_value
= hgot
->root
.u
.def
.value
4252 + hgot
->root
.u
.def
.section
->output_section
->vma
4253 + hgot
->root
.u
.def
.section
->output_offset
;
4255 _bfinfdpic_add_rofixup (output_bfd
, bfinfdpic_gotfixup_section (info
),
4258 if (bfinfdpic_gotfixup_section (info
)->size
4259 != (bfinfdpic_gotfixup_section (info
)->reloc_count
* 4))
4262 ("LINKER BUG: .rofixup section size mismatch");
4267 if (elf_hash_table (info
)->dynamic_sections_created
)
4269 BFD_ASSERT (bfinfdpic_pltrel_section (info
)->size
4270 == (bfinfdpic_pltrel_section (info
)->reloc_count
4271 * sizeof (Elf32_External_Rel
)));
4274 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4276 if (elf_hash_table (info
)->dynamic_sections_created
)
4278 Elf32_External_Dyn
* dyncon
;
4279 Elf32_External_Dyn
* dynconend
;
4281 BFD_ASSERT (sdyn
!= NULL
);
4283 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4284 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4286 for (; dyncon
< dynconend
; dyncon
++)
4288 Elf_Internal_Dyn dyn
;
4290 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4298 dyn
.d_un
.d_ptr
= bfinfdpic_got_section (info
)->output_section
->vma
4299 + bfinfdpic_got_section (info
)->output_offset
4300 + bfinfdpic_got_initial_offset (info
);
4301 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4305 dyn
.d_un
.d_ptr
= bfinfdpic_pltrel_section (info
)
4306 ->output_section
->vma
4307 + bfinfdpic_pltrel_section (info
)->output_offset
;
4308 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4312 dyn
.d_un
.d_val
= bfinfdpic_pltrel_section (info
)->size
;
4313 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4322 /* Adjust a symbol defined by a dynamic object and referenced by a
4326 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4327 struct elf_link_hash_entry
*h
)
4331 dynobj
= elf_hash_table (info
)->dynobj
;
4333 /* Make sure we know what is going on here. */
4334 BFD_ASSERT (dynobj
!= NULL
4338 && !h
->def_regular
)));
4340 /* If this is a weak symbol, and there is a real definition, the
4341 processor independent code will have arranged for us to see the
4342 real definition first, and we can just use the same value. */
4343 if (h
->is_weakalias
)
4345 struct elf_link_hash_entry
*def
= weakdef (h
);
4346 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
4347 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
4348 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
4354 /* Perform any actions needed for dynamic symbols. */
4357 elf32_bfinfdpic_finish_dynamic_symbol
4358 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4359 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4360 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
4361 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4366 /* Decide whether to attempt to turn absptr or lsda encodings in
4367 shared libraries into pcrel within the given input section. */
4370 bfinfdpic_elf_use_relative_eh_frame
4371 (bfd
*input_bfd ATTRIBUTE_UNUSED
,
4372 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4373 asection
*eh_frame_section ATTRIBUTE_UNUSED
)
4375 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4379 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4382 bfinfdpic_elf_encode_eh_address (bfd
*abfd
,
4383 struct bfd_link_info
*info
,
4384 asection
*osec
, bfd_vma offset
,
4385 asection
*loc_sec
, bfd_vma loc_offset
,
4388 struct elf_link_hash_entry
*h
;
4390 h
= elf_hash_table (info
)->hgot
;
4391 BFD_ASSERT (h
&& h
->root
.type
== bfd_link_hash_defined
);
4393 if (! h
|| (_bfinfdpic_osec_to_segment (abfd
, osec
)
4394 == _bfinfdpic_osec_to_segment (abfd
, loc_sec
->output_section
)))
4395 return _bfd_elf_encode_eh_address (abfd
, info
, osec
, offset
,
4396 loc_sec
, loc_offset
, encoded
);
4398 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd
, osec
)
4399 == (_bfinfdpic_osec_to_segment
4400 (abfd
, h
->root
.u
.def
.section
->output_section
)));
4402 *encoded
= osec
->vma
+ offset
4403 - (h
->root
.u
.def
.value
4404 + h
->root
.u
.def
.section
->output_section
->vma
4405 + h
->root
.u
.def
.section
->output_offset
);
4407 return DW_EH_PE_datarel
| DW_EH_PE_sdata4
;
4412 /* Look through the relocs for a section during the first phase.
4414 Besides handling virtual table relocs for gc, we have to deal with
4415 all sorts of PIC-related relocations. We describe below the
4416 general plan on how to handle such relocations, even though we only
4417 collect information at this point, storing them in hash tables for
4418 perusal of later passes.
4420 32 relocations are propagated to the linker output when creating
4421 position-independent output. LO16 and HI16 relocations are not
4422 supposed to be encountered in this case.
4424 LABEL16 should always be resolvable by the linker, since it's only
4427 LABEL24, on the other hand, is used by calls. If it turns out that
4428 the target of a call is a dynamic symbol, a PLT entry must be
4429 created for it, which triggers the creation of a private function
4430 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4432 GPREL relocations require the referenced symbol to be in the same
4433 segment as _gp, but this can only be checked later.
4435 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4436 exist. LABEL24 might as well, since it may require a PLT entry,
4437 that will require a got.
4439 Non-FUNCDESC GOT relocations require a GOT entry to be created
4440 regardless of whether the symbol is dynamic. However, since a
4441 global symbol that turns out to not be exported may have the same
4442 address of a non-dynamic symbol, we don't assign GOT entries at
4443 this point, such that we can share them in this case. A relocation
4444 for the GOT entry always has to be created, be it to offset a
4445 private symbol by the section load address, be it to get the symbol
4446 resolved dynamically.
4448 FUNCDESC GOT relocations require a GOT entry to be created, and
4449 handled as if a FUNCDESC relocation was applied to the GOT entry in
4452 FUNCDESC relocations referencing a symbol that turns out to NOT be
4453 dynamic cause a private function descriptor to be created. The
4454 FUNCDESC relocation then decays to a 32 relocation that points at
4455 the private descriptor. If the symbol is dynamic, the FUNCDESC
4456 relocation is propagated to the linker output, such that the
4457 dynamic linker creates the canonical descriptor, pointing to the
4458 dynamically-resolved definition of the function.
4460 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4461 symbols that are assigned to the same segment as the GOT, but we
4462 can only check this later, after we know the complete set of
4463 symbols defined and/or exported.
4465 FUNCDESC GOTOFF relocations require a function descriptor to be
4466 created and, unless lazy binding is disabled or the symbol is not
4467 dynamic, a lazy PLT entry. Since we can't tell at this point
4468 whether a symbol is going to be dynamic, we have to decide later
4469 whether to create a lazy PLT entry or bind the descriptor directly
4470 to the private function.
4472 FUNCDESC_VALUE relocations are not supposed to be present in object
4473 files, but they may very well be simply propagated to the linker
4474 output, since they have no side effect.
4477 A function descriptor always requires a FUNCDESC_VALUE relocation.
4478 Whether it's in .plt.rel or not depends on whether lazy binding is
4479 enabled and on whether the referenced symbol is dynamic.
4481 The existence of a lazy PLT requires the resolverStub lazy PLT
4482 entry to be present.
4485 As for assignment of GOT, PLT and lazy PLT entries, and private
4486 descriptors, we might do them all sequentially, but we can do
4487 better than that. For example, we can place GOT entries and
4488 private function descriptors referenced using 12-bit operands
4489 closer to the PIC register value, such that these relocations don't
4490 overflow. Those that are only referenced with LO16 relocations
4491 could come next, but we may as well place PLT-required function
4492 descriptors in the 12-bit range to make them shorter. Symbols
4493 referenced with LO16/HI16 may come next, but we may place
4494 additional function descriptors in the 16-bit range if we can
4495 reliably tell that we've already placed entries that are ever
4496 referenced with only LO16. PLT entries are therefore generated as
4497 small as possible, while not introducing relocation overflows in
4498 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4499 generated before or after PLT entries, but not intermingled with
4500 them, such that we can have more lazy PLT entries in range for a
4501 branch to the resolverStub. The resolverStub should be emitted at
4502 the most distant location from the first lazy PLT entry such that
4503 it's still in range for a branch, or closer, if there isn't a need
4504 for so many lazy PLT entries. Additional lazy PLT entries may be
4505 emitted after the resolverStub, as long as branches are still in
4506 range. If the branch goes out of range, longer lazy PLT entries
4509 We could further optimize PLT and lazy PLT entries by giving them
4510 priority in assignment to closer-to-gr17 locations depending on the
4511 number of occurrences of references to them (assuming a function
4512 that's called more often is more important for performance, so its
4513 PLT entry should be faster), or taking hints from the compiler.
4514 Given infinite time and money... :-) */
4517 bfinfdpic_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4518 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4520 Elf_Internal_Shdr
*symtab_hdr
;
4521 struct elf_link_hash_entry
**sym_hashes
;
4522 const Elf_Internal_Rela
*rel
;
4523 const Elf_Internal_Rela
*rel_end
;
4525 struct bfinfdpic_relocs_info
*picrel
;
4527 if (bfd_link_relocatable (info
))
4530 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4531 sym_hashes
= elf_sym_hashes (abfd
);
4533 dynobj
= elf_hash_table (info
)->dynobj
;
4534 rel_end
= relocs
+ sec
->reloc_count
;
4535 for (rel
= relocs
; rel
< rel_end
; rel
++)
4537 struct elf_link_hash_entry
*h
;
4538 unsigned long r_symndx
;
4540 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4541 if (r_symndx
< symtab_hdr
->sh_info
)
4544 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4546 switch (ELF32_R_TYPE (rel
->r_info
))
4548 case R_BFIN_GOT17M4
:
4551 case R_BFIN_FUNCDESC_GOT17M4
:
4552 case R_BFIN_FUNCDESC_GOTHI
:
4553 case R_BFIN_FUNCDESC_GOTLO
:
4554 case R_BFIN_GOTOFF17M4
:
4555 case R_BFIN_GOTOFFHI
:
4556 case R_BFIN_GOTOFFLO
:
4557 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4558 case R_BFIN_FUNCDESC_GOTOFFHI
:
4559 case R_BFIN_FUNCDESC_GOTOFFLO
:
4560 case R_BFIN_FUNCDESC
:
4561 case R_BFIN_FUNCDESC_VALUE
:
4562 if (! IS_FDPIC (abfd
))
4565 case R_BFIN_PCREL24
:
4566 case R_BFIN_PCREL24_JUMP_L
:
4567 case R_BFIN_BYTE4_DATA
:
4568 if (IS_FDPIC (abfd
) && ! dynobj
)
4570 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4571 if (! _bfin_create_got_section (abfd
, info
))
4574 if (! IS_FDPIC (abfd
))
4581 if (h
->dynindx
== -1)
4582 switch (ELF_ST_VISIBILITY (h
->other
))
4588 bfd_elf_link_record_dynamic_symbol (info
, h
);
4592 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4594 rel
->r_addend
, INSERT
);
4597 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4598 (info
), abfd
, r_symndx
,
4599 rel
->r_addend
, INSERT
);
4609 switch (ELF32_R_TYPE (rel
->r_info
))
4611 case R_BFIN_PCREL24
:
4612 case R_BFIN_PCREL24_JUMP_L
:
4613 if (IS_FDPIC (abfd
))
4617 case R_BFIN_FUNCDESC_VALUE
:
4618 picrel
->relocsfdv
++;
4619 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4623 case R_BFIN_BYTE4_DATA
:
4624 if (! IS_FDPIC (abfd
))
4628 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4632 case R_BFIN_GOT17M4
:
4641 case R_BFIN_FUNCDESC_GOT17M4
:
4642 picrel
->fdgot17m4
++;
4645 case R_BFIN_FUNCDESC_GOTHI
:
4646 case R_BFIN_FUNCDESC_GOTLO
:
4647 picrel
->fdgothilo
++;
4650 case R_BFIN_GOTOFF17M4
:
4651 case R_BFIN_GOTOFFHI
:
4652 case R_BFIN_GOTOFFLO
:
4656 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4657 picrel
->fdgoff17m4
++;
4660 case R_BFIN_FUNCDESC_GOTOFFHI
:
4661 case R_BFIN_FUNCDESC_GOTOFFLO
:
4662 picrel
->fdgoffhilo
++;
4665 case R_BFIN_FUNCDESC
:
4670 /* This relocation describes the C++ object vtable hierarchy.
4671 Reconstruct it for later use during GC. */
4672 case R_BFIN_GNU_VTINHERIT
:
4673 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4677 /* This relocation describes which C++ vtable entries are actually
4678 used. Record for later use during GC. */
4679 case R_BFIN_GNU_VTENTRY
:
4680 BFD_ASSERT (h
!= NULL
);
4682 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4686 case R_BFIN_HUIMM16
:
4687 case R_BFIN_LUIMM16
:
4688 case R_BFIN_PCREL12_JUMP_S
:
4689 case R_BFIN_PCREL10
:
4695 /* xgettext:c-format */
4696 (_("%pB: unsupported relocation type %#x"),
4697 abfd
, (int) ELF32_R_TYPE (rel
->r_info
));
4705 /* Set the right machine number for a Blackfin ELF file. */
4708 elf32_bfin_object_p (bfd
*abfd
)
4710 bfd_default_set_arch_mach (abfd
, bfd_arch_bfin
, 0);
4711 return (((elf_elfheader (abfd
)->e_flags
& EF_BFIN_FDPIC
) != 0)
4712 == (IS_FDPIC (abfd
)));
4716 elf32_bfin_set_private_flags (bfd
* abfd
, flagword flags
)
4718 elf_elfheader (abfd
)->e_flags
= flags
;
4719 elf_flags_init (abfd
) = TRUE
;
4723 /* Display the flags field. */
4725 elf32_bfin_print_private_bfd_data (bfd
* abfd
, void * ptr
)
4727 FILE *file
= (FILE *) ptr
;
4730 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
4732 /* Print normal ELF private data. */
4733 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
4735 flags
= elf_elfheader (abfd
)->e_flags
;
4737 /* xgettext:c-format */
4738 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
4740 if (flags
& EF_BFIN_PIC
)
4741 fprintf (file
, " -fpic");
4743 if (flags
& EF_BFIN_FDPIC
)
4744 fprintf (file
, " -mfdpic");
4751 /* Merge backend specific data from an object file to the output
4752 object file when linking. */
4755 elf32_bfin_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
4757 bfd
*obfd
= info
->output_bfd
;
4758 flagword old_flags
, new_flags
;
4759 bfd_boolean error
= FALSE
;
4761 new_flags
= elf_elfheader (ibfd
)->e_flags
;
4762 old_flags
= elf_elfheader (obfd
)->e_flags
;
4764 if (new_flags
& EF_BFIN_FDPIC
)
4765 new_flags
&= ~EF_BFIN_PIC
;
4771 ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %pB",
4772 old_flags
, new_flags
, elf_flags_init (obfd
) ? "yes" : "no", ibfd
);
4774 if (!elf_flags_init (obfd
)) /* First call, no flags set. */
4776 elf_flags_init (obfd
) = TRUE
;
4777 elf_elfheader (obfd
)->e_flags
= new_flags
;
4780 if (((new_flags
& EF_BFIN_FDPIC
) == 0) != (! IS_FDPIC (obfd
)))
4783 if (IS_FDPIC (obfd
))
4785 (_("%pB: cannot link non-fdpic object file into fdpic executable"),
4789 (_("%pB: cannot link fdpic object file into non-fdpic executable"),
4794 bfd_set_error (bfd_error_bad_value
);
4799 /* bfin ELF linker hash entry. */
4801 struct bfin_link_hash_entry
4803 struct elf_link_hash_entry root
;
4805 /* Number of PC relative relocs copied for this symbol. */
4806 struct bfin_pcrel_relocs_copied
*pcrel_relocs_copied
;
4809 /* bfin ELF linker hash table. */
4811 struct bfin_link_hash_table
4813 struct elf_link_hash_table root
;
4815 /* Small local sym cache. */
4816 struct sym_cache sym_cache
;
4819 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4821 static struct bfd_hash_entry
*
4822 bfin_link_hash_newfunc (struct bfd_hash_entry
*entry
,
4823 struct bfd_hash_table
*table
, const char *string
)
4825 struct bfd_hash_entry
*ret
= entry
;
4827 /* Allocate the structure if it has not already been allocated by a
4830 ret
= bfd_hash_allocate (table
, sizeof (struct bfin_link_hash_entry
));
4834 /* Call the allocation method of the superclass. */
4835 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
4837 bfin_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
4842 /* Create an bfin ELF linker hash table. */
4844 static struct bfd_link_hash_table
*
4845 bfin_link_hash_table_create (bfd
* abfd
)
4847 struct bfin_link_hash_table
*ret
;
4848 bfd_size_type amt
= sizeof (struct bfin_link_hash_table
);
4850 ret
= bfd_zmalloc (amt
);
4854 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
4855 bfin_link_hash_newfunc
,
4856 sizeof (struct elf_link_hash_entry
),
4863 ret
->sym_cache
.abfd
= NULL
;
4865 return &ret
->root
.root
;
4868 /* The size in bytes of an entry in the procedure linkage table. */
4870 /* Finish up the dynamic sections. */
4873 bfin_finish_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4874 struct bfd_link_info
*info
)
4879 dynobj
= elf_hash_table (info
)->dynobj
;
4881 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4883 if (elf_hash_table (info
)->dynamic_sections_created
)
4885 Elf32_External_Dyn
*dyncon
, *dynconend
;
4887 BFD_ASSERT (sdyn
!= NULL
);
4889 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4890 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4891 for (; dyncon
< dynconend
; dyncon
++)
4893 Elf_Internal_Dyn dyn
;
4895 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4903 /* Finish up dynamic symbol handling. We set the contents of various
4904 dynamic sections here. */
4907 bfin_finish_dynamic_symbol (bfd
* output_bfd
,
4908 struct bfd_link_info
*info
,
4909 struct elf_link_hash_entry
*h
,
4910 Elf_Internal_Sym
* sym
)
4912 if (h
->got
.offset
!= (bfd_vma
) - 1)
4916 Elf_Internal_Rela rela
;
4919 /* This symbol has an entry in the global offset table.
4922 sgot
= elf_hash_table (info
)->sgot
;
4923 srela
= elf_hash_table (info
)->srelgot
;
4924 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
4926 rela
.r_offset
= (sgot
->output_section
->vma
4927 + sgot
->output_offset
4928 + (h
->got
.offset
& ~(bfd_vma
) 1));
4930 /* If this is a -Bsymbolic link, and the symbol is defined
4931 locally, we just want to emit a RELATIVE reloc. Likewise if
4932 the symbol was forced to be local because of a version file.
4933 The entry in the global offset table will already have been
4934 initialized in the relocate_section function. */
4935 if (bfd_link_pic (info
)
4937 || h
->dynindx
== -1 || h
->forced_local
) && h
->def_regular
)
4939 _bfd_error_handler (_("*** check this relocation %s"),
4941 rela
.r_info
= ELF32_R_INFO (0, R_BFIN_PCREL24
);
4942 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
4946 offset
& ~(bfd_vma
) 1)));
4950 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4951 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
4952 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_BFIN_GOT
);
4956 loc
= srela
->contents
;
4957 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
4958 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
4965 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4966 if (strcmp (h
->root
.root
.string
, "__DYNAMIC") == 0
4967 || h
== elf_hash_table (info
)->hgot
)
4968 sym
->st_shndx
= SHN_ABS
;
4973 /* Adjust a symbol defined by a dynamic object and referenced by a
4974 regular object. The current definition is in some section of the
4975 dynamic object, but we're not including those sections. We have to
4976 change the definition to something the rest of the link can
4980 bfin_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4981 struct elf_link_hash_entry
*h
)
4985 unsigned int power_of_two
;
4987 dynobj
= elf_hash_table (info
)->dynobj
;
4989 /* Make sure we know what is going on here. */
4990 BFD_ASSERT (dynobj
!= NULL
4993 || (h
->def_dynamic
&& h
->ref_regular
&& !h
->def_regular
)));
4995 /* If this is a function, put it in the procedure linkage table. We
4996 will fill in the contents of the procedure linkage table later,
4997 when we know the address of the .got section. */
4998 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
5003 /* If this is a weak symbol, and there is a real definition, the
5004 processor independent code will have arranged for us to see the
5005 real definition first, and we can just use the same value. */
5006 if (h
->is_weakalias
)
5008 struct elf_link_hash_entry
*def
= weakdef (h
);
5009 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
5010 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
5011 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
5015 /* This is a reference to a symbol defined by a dynamic object which
5016 is not a function. */
5018 /* If we are creating a shared library, we must presume that the
5019 only references to the symbol are via the global offset table.
5020 For such cases we need not do anything here; the relocations will
5021 be handled correctly by relocate_section. */
5022 if (bfd_link_pic (info
))
5025 /* We must allocate the symbol in our .dynbss section, which will
5026 become part of the .bss section of the executable. There will be
5027 an entry for this symbol in the .dynsym section. The dynamic
5028 object will contain position independent code, so all references
5029 from the dynamic object to this symbol will go through the global
5030 offset table. The dynamic linker will use the .dynsym entry to
5031 determine the address it must put in the global offset table, so
5032 both the dynamic object and the regular object will refer to the
5033 same memory location for the variable. */
5035 s
= bfd_get_linker_section (dynobj
, ".dynbss");
5036 BFD_ASSERT (s
!= NULL
);
5038 #if 0 /* Bfin does not currently have a COPY reloc. */
5039 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to
5040 copy the initial value out of the dynamic object and into the
5041 runtime process image. We need to remember the offset into the
5042 .rela.bss section we are going to use. */
5043 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5047 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
5048 BFD_ASSERT (srel
!= NULL
);
5049 srel
->size
+= sizeof (Elf32_External_Rela
);
5053 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5055 _bfd_error_handler (_("the bfin target does not currently support the generation of copy relocations"));
5059 /* We need to figure out the alignment required for this symbol. I
5060 have no idea how ELF linkers handle this. */
5061 power_of_two
= bfd_log2 (h
->size
);
5062 if (power_of_two
> 3)
5065 /* Apply the required alignment. */
5066 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
5067 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
5069 if (!bfd_set_section_alignment (dynobj
, s
, power_of_two
))
5073 /* Define the symbol as being at this point in the section. */
5074 h
->root
.u
.def
.section
= s
;
5075 h
->root
.u
.def
.value
= s
->size
;
5077 /* Increment the section size to make room for the symbol. */
5083 /* The bfin linker needs to keep track of the number of relocs that it
5084 decides to copy in check_relocs for each symbol. This is so that it
5085 can discard PC relative relocs if it doesn't need them when linking
5086 with -Bsymbolic. We store the information in a field extending the
5087 regular ELF linker hash table. */
5089 /* This structure keeps track of the number of PC relative relocs we have
5090 copied for a given symbol. */
5092 struct bfin_pcrel_relocs_copied
5095 struct bfin_pcrel_relocs_copied
*next
;
5096 /* A section in dynobj. */
5098 /* Number of relocs copied in this section. */
5099 bfd_size_type count
;
5102 /* This function is called via elf_link_hash_traverse if we are
5103 creating a shared object. In the -Bsymbolic case it discards the
5104 space allocated to copy PC relative relocs against symbols which
5105 are defined in regular objects. For the normal shared case, it
5106 discards space for pc-relative relocs that have become local due to
5107 symbol visibility changes. We allocated space for them in the
5108 check_relocs routine, but we won't fill them in in the
5109 relocate_section routine.
5111 We also check whether any of the remaining relocations apply
5112 against a readonly section, and set the DF_TEXTREL flag in this
5116 bfin_discard_copies (struct elf_link_hash_entry
*h
, void * inf
)
5118 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5119 struct bfin_pcrel_relocs_copied
*s
;
5121 if (!h
->def_regular
|| (!info
->symbolic
&& !h
->forced_local
))
5123 if ((info
->flags
& DF_TEXTREL
) == 0)
5125 /* Look for relocations against read-only sections. */
5126 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5127 s
!= NULL
; s
= s
->next
)
5128 if ((s
->section
->flags
& SEC_READONLY
) != 0)
5130 info
->flags
|= DF_TEXTREL
;
5138 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5139 s
!= NULL
; s
= s
->next
)
5140 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
5146 bfin_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
5147 struct bfd_link_info
*info
)
5153 dynobj
= elf_hash_table (info
)->dynobj
;
5154 BFD_ASSERT (dynobj
!= NULL
);
5156 if (elf_hash_table (info
)->dynamic_sections_created
)
5158 /* Set the contents of the .interp section to the interpreter. */
5159 if (bfd_link_executable (info
) && !info
->nointerp
)
5161 s
= bfd_get_linker_section (dynobj
, ".interp");
5162 BFD_ASSERT (s
!= NULL
);
5163 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5164 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5169 /* We may have created entries in the .rela.got section.
5170 However, if we are not creating the dynamic sections, we will
5171 not actually use these entries. Reset the size of .rela.got,
5172 which will cause it to get stripped from the output file
5174 s
= elf_hash_table (info
)->srelgot
;
5179 /* If this is a -Bsymbolic shared link, then we need to discard all
5180 PC relative relocs against symbols defined in a regular object.
5181 For the normal shared case we discard the PC relative relocs
5182 against symbols that have become local due to visibility changes.
5183 We allocated space for them in the check_relocs routine, but we
5184 will not fill them in in the relocate_section routine. */
5185 if (bfd_link_pic (info
))
5186 elf_link_hash_traverse (elf_hash_table (info
),
5187 bfin_discard_copies
, info
);
5189 /* The check_relocs and adjust_dynamic_symbol entry points have
5190 determined the sizes of the various dynamic sections. Allocate
5193 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5198 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5201 /* It's OK to base decisions on the section name, because none
5202 of the dynobj section names depend upon the input files. */
5203 name
= bfd_get_section_name (dynobj
, s
);
5207 if (CONST_STRNEQ (name
, ".rela"))
5211 /* If we don't need this section, strip it from the
5212 output file. This is mostly to handle .rela.bss and
5213 .rela.plt. We must create both sections in
5214 create_dynamic_sections, because they must be created
5215 before the linker maps input sections to output
5216 sections. The linker does that before
5217 adjust_dynamic_symbol is called, and it is that
5218 function which decides whether anything needs to go
5219 into these sections. */
5226 /* We use the reloc_count field as a counter if we need
5227 to copy relocs into the output file. */
5231 else if (! CONST_STRNEQ (name
, ".got"))
5233 /* It's not one of our sections, so don't allocate space. */
5239 s
->flags
|= SEC_EXCLUDE
;
5243 /* Allocate memory for the section contents. */
5244 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5245 Unused entries should be reclaimed before the section's contents
5246 are written out, but at the moment this does not happen. Thus in
5247 order to prevent writing out garbage, we initialise the section's
5248 contents to zero. */
5249 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
5250 if (s
->contents
== NULL
&& s
->size
!= 0)
5254 if (elf_hash_table (info
)->dynamic_sections_created
)
5256 /* Add some entries to the .dynamic section. We fill in the
5257 values later, in bfin_finish_dynamic_sections, but we
5258 must add the entries now so that we get the correct size for
5259 the .dynamic section. The DT_DEBUG entry is filled in by the
5260 dynamic linker and used by the debugger. */
5261 #define add_dynamic_entry(TAG, VAL) \
5262 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5264 if (!bfd_link_pic (info
))
5266 if (!add_dynamic_entry (DT_DEBUG
, 0))
5273 if (!add_dynamic_entry (DT_RELA
, 0)
5274 || !add_dynamic_entry (DT_RELASZ
, 0)
5275 || !add_dynamic_entry (DT_RELAENT
,
5276 sizeof (Elf32_External_Rela
)))
5280 if ((info
->flags
& DF_TEXTREL
) != 0)
5282 if (!add_dynamic_entry (DT_TEXTREL
, 0))
5286 #undef add_dynamic_entry
5291 /* Given a .data section and a .emreloc in-memory section, store
5292 relocation information into the .emreloc section which can be
5293 used at runtime to relocate the section. This is called by the
5294 linker when the --embedded-relocs switch is used. This is called
5295 after the add_symbols entry point has been called for all the
5296 objects, and before the final_link entry point is called. */
5299 bfd_bfin_elf32_create_embedded_relocs (bfd
*abfd
,
5300 struct bfd_link_info
*info
,
5305 Elf_Internal_Shdr
*symtab_hdr
;
5306 Elf_Internal_Sym
*isymbuf
= NULL
;
5307 Elf_Internal_Rela
*internal_relocs
= NULL
;
5308 Elf_Internal_Rela
*irel
, *irelend
;
5312 BFD_ASSERT (! bfd_link_relocatable (info
));
5316 if (datasec
->reloc_count
== 0)
5319 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5321 /* Get a copy of the native relocations. */
5322 internal_relocs
= (_bfd_elf_link_read_relocs
5323 (abfd
, datasec
, NULL
, (Elf_Internal_Rela
*) NULL
,
5324 info
->keep_memory
));
5325 if (internal_relocs
== NULL
)
5328 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
5329 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
5330 if (relsec
->contents
== NULL
)
5333 p
= relsec
->contents
;
5335 irelend
= internal_relocs
+ datasec
->reloc_count
;
5336 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
5338 asection
*targetsec
;
5340 /* We are going to write a four byte longword into the runtime
5341 reloc section. The longword will be the address in the data
5342 section which must be relocated. It is followed by the name
5343 of the target section NUL-padded or truncated to 8
5346 /* We can only relocate absolute longword relocs at run time. */
5347 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_BFIN_BYTE4_DATA
)
5349 *errmsg
= _("unsupported relocation type");
5350 bfd_set_error (bfd_error_bad_value
);
5354 /* Get the target section referred to by the reloc. */
5355 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
5357 /* A local symbol. */
5358 Elf_Internal_Sym
*isym
;
5360 /* Read this BFD's local symbols if we haven't done so already. */
5361 if (isymbuf
== NULL
)
5363 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5364 if (isymbuf
== NULL
)
5365 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
5366 symtab_hdr
->sh_info
, 0,
5368 if (isymbuf
== NULL
)
5372 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
5373 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5378 struct elf_link_hash_entry
*h
;
5380 /* An external symbol. */
5381 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
5382 h
= elf_sym_hashes (abfd
)[indx
];
5383 BFD_ASSERT (h
!= NULL
);
5384 if (h
->root
.type
== bfd_link_hash_defined
5385 || h
->root
.type
== bfd_link_hash_defweak
)
5386 targetsec
= h
->root
.u
.def
.section
;
5391 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
5392 memset (p
+ 4, 0, 8);
5393 if (targetsec
!= NULL
)
5394 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
5397 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5399 if (internal_relocs
!= NULL
5400 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5401 free (internal_relocs
);
5405 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5407 if (internal_relocs
!= NULL
5408 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5409 free (internal_relocs
);
5413 struct bfd_elf_special_section
const elf32_bfin_special_sections
[] =
5415 { ".l1.text", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
5416 { ".l1.data", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
5417 { NULL
, 0, 0, 0, 0 }
5421 #define TARGET_LITTLE_SYM bfin_elf32_vec
5422 #define TARGET_LITTLE_NAME "elf32-bfin"
5423 #define ELF_ARCH bfd_arch_bfin
5424 #define ELF_TARGET_ID BFIN_ELF_DATA
5425 #define ELF_MACHINE_CODE EM_BLACKFIN
5426 #define ELF_MAXPAGESIZE 0x1000
5427 #define elf_symbol_leading_char '_'
5429 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5430 #define bfd_elf32_bfd_reloc_name_lookup \
5431 bfin_bfd_reloc_name_lookup
5432 #define elf_info_to_howto bfin_info_to_howto
5433 #define elf_info_to_howto_rel NULL
5434 #define elf_backend_object_p elf32_bfin_object_p
5436 #define bfd_elf32_bfd_is_local_label_name \
5437 bfin_is_local_label_name
5438 #define bfin_hash_table(p) \
5439 ((struct bfin_link_hash_table *) (p)->hash)
5443 #define elf_backend_create_dynamic_sections \
5444 _bfd_elf_create_dynamic_sections
5445 #define bfd_elf32_bfd_link_hash_table_create \
5446 bfin_link_hash_table_create
5447 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5449 #define elf_backend_check_relocs bfin_check_relocs
5450 #define elf_backend_adjust_dynamic_symbol \
5451 bfin_adjust_dynamic_symbol
5452 #define elf_backend_size_dynamic_sections \
5453 bfin_size_dynamic_sections
5454 #define elf_backend_relocate_section bfin_relocate_section
5455 #define elf_backend_finish_dynamic_symbol \
5456 bfin_finish_dynamic_symbol
5457 #define elf_backend_finish_dynamic_sections \
5458 bfin_finish_dynamic_sections
5459 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5460 #define bfd_elf32_bfd_merge_private_bfd_data \
5461 elf32_bfin_merge_private_bfd_data
5462 #define bfd_elf32_bfd_set_private_flags \
5463 elf32_bfin_set_private_flags
5464 #define bfd_elf32_bfd_print_private_bfd_data \
5465 elf32_bfin_print_private_bfd_data
5466 #define elf_backend_final_write_processing \
5467 elf32_bfin_final_write_processing
5468 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5469 #define elf_backend_stack_align 8
5470 #define elf_backend_can_gc_sections 1
5471 #define elf_backend_special_sections elf32_bfin_special_sections
5472 #define elf_backend_can_refcount 1
5473 #define elf_backend_want_got_plt 0
5474 #define elf_backend_plt_readonly 1
5475 #define elf_backend_want_plt_sym 0
5476 #define elf_backend_got_header_size 12
5477 #define elf_backend_rela_normal 1
5479 #include "elf32-target.h"
5481 #undef TARGET_LITTLE_SYM
5482 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5483 #undef TARGET_LITTLE_NAME
5484 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5486 #define elf32_bed elf32_bfinfdpic_bed
5488 #undef elf_backend_got_header_size
5489 #define elf_backend_got_header_size 0
5491 #undef elf_backend_relocate_section
5492 #define elf_backend_relocate_section bfinfdpic_relocate_section
5493 #undef elf_backend_check_relocs
5494 #define elf_backend_check_relocs bfinfdpic_check_relocs
5496 #undef bfd_elf32_bfd_link_hash_table_create
5497 #define bfd_elf32_bfd_link_hash_table_create \
5498 bfinfdpic_elf_link_hash_table_create
5499 #undef elf_backend_always_size_sections
5500 #define elf_backend_always_size_sections \
5501 elf32_bfinfdpic_always_size_sections
5503 #undef elf_backend_create_dynamic_sections
5504 #define elf_backend_create_dynamic_sections \
5505 elf32_bfinfdpic_create_dynamic_sections
5506 #undef elf_backend_adjust_dynamic_symbol
5507 #define elf_backend_adjust_dynamic_symbol \
5508 elf32_bfinfdpic_adjust_dynamic_symbol
5509 #undef elf_backend_size_dynamic_sections
5510 #define elf_backend_size_dynamic_sections \
5511 elf32_bfinfdpic_size_dynamic_sections
5512 #undef elf_backend_finish_dynamic_symbol
5513 #define elf_backend_finish_dynamic_symbol \
5514 elf32_bfinfdpic_finish_dynamic_symbol
5515 #undef elf_backend_finish_dynamic_sections
5516 #define elf_backend_finish_dynamic_sections \
5517 elf32_bfinfdpic_finish_dynamic_sections
5519 #undef elf_backend_discard_info
5520 #define elf_backend_discard_info \
5521 bfinfdpic_elf_discard_info
5522 #undef elf_backend_can_make_relative_eh_frame
5523 #define elf_backend_can_make_relative_eh_frame \
5524 bfinfdpic_elf_use_relative_eh_frame
5525 #undef elf_backend_can_make_lsda_relative_eh_frame
5526 #define elf_backend_can_make_lsda_relative_eh_frame \
5527 bfinfdpic_elf_use_relative_eh_frame
5528 #undef elf_backend_encode_eh_address
5529 #define elf_backend_encode_eh_address \
5530 bfinfdpic_elf_encode_eh_address
5532 #undef elf_backend_may_use_rel_p
5533 #define elf_backend_may_use_rel_p 1
5534 #undef elf_backend_may_use_rela_p
5535 #define elf_backend_may_use_rela_p 1
5536 /* We use REL for dynamic relocations only. */
5537 #undef elf_backend_default_use_rela_p
5538 #define elf_backend_default_use_rela_p 1
5540 #undef elf_backend_omit_section_dynsym
5541 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5543 #include "elf32-target.h"