1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
29 /* FUNCTION : bfin_pltpc_reloc
30 ABSTRACT : TODO : figure out how to handle pltpc relocs. */
31 static bfd_reloc_status_type
33 bfd
*abfd ATTRIBUTE_UNUSED
,
34 arelent
*reloc_entry ATTRIBUTE_UNUSED
,
35 asymbol
*symbol ATTRIBUTE_UNUSED
,
36 void * data ATTRIBUTE_UNUSED
,
37 asection
*input_section ATTRIBUTE_UNUSED
,
38 bfd
*output_bfd ATTRIBUTE_UNUSED
,
39 char **error_message ATTRIBUTE_UNUSED
)
41 bfd_reloc_status_type flag
= bfd_reloc_ok
;
46 static bfd_reloc_status_type
47 bfin_pcrel24_reloc (bfd
*abfd
,
51 asection
*input_section
,
53 char **error_message ATTRIBUTE_UNUSED
)
56 bfd_size_type addr
= reloc_entry
->address
;
57 bfd_vma output_base
= 0;
58 reloc_howto_type
*howto
= reloc_entry
->howto
;
59 asection
*output_section
;
60 bfd_boolean relocatable
= (output_bfd
!= NULL
);
62 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
63 return bfd_reloc_outofrange
;
65 if (bfd_is_und_section (symbol
->section
)
66 && (symbol
->flags
& BSF_WEAK
) == 0
68 return bfd_reloc_undefined
;
70 if (bfd_is_com_section (symbol
->section
))
73 relocation
= symbol
->value
;
75 output_section
= symbol
->section
->output_section
;
80 output_base
= output_section
->vma
;
82 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
83 relocation
+= output_base
+ symbol
->section
->output_offset
;
85 if (!relocatable
&& !strcmp (symbol
->name
, symbol
->section
->name
))
86 relocation
+= reloc_entry
->addend
;
88 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
89 relocation
-= reloc_entry
->address
;
91 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
93 bfd_reloc_status_type status
;
94 status
= bfd_check_overflow (howto
->complain_on_overflow
,
97 bfd_arch_bits_per_address(abfd
),
99 if (status
!= bfd_reloc_ok
)
103 /* if rightshift is 1 and the number odd, return error. */
104 if (howto
->rightshift
&& (relocation
& 0x01))
106 _bfd_error_handler (_("relocation should be even number"));
107 return bfd_reloc_overflow
;
110 relocation
>>= (bfd_vma
) howto
->rightshift
;
111 /* Shift everything up to where it's going to be used. */
113 relocation
<<= (bfd_vma
) howto
->bitpos
;
117 reloc_entry
->address
+= input_section
->output_offset
;
118 reloc_entry
->addend
+= symbol
->section
->output_offset
;
124 /* We are getting reloc_entry->address 2 byte off from
125 the start of instruction. Assuming absolute postion
126 of the reloc data. But, following code had been written assuming
127 reloc address is starting at begining of instruction.
128 To compensate that I have increased the value of
129 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
132 x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
- 2);
133 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
134 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
- 2);
136 x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
);
137 x
= relocation
& 0xFFFF;
138 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
);
143 static bfd_reloc_status_type
144 bfin_imm16_reloc (bfd
*abfd
,
145 arelent
*reloc_entry
,
148 asection
*input_section
,
150 char **error_message ATTRIBUTE_UNUSED
)
152 bfd_vma relocation
, x
;
153 bfd_size_type reloc_addr
= reloc_entry
->address
;
154 bfd_vma output_base
= 0;
155 reloc_howto_type
*howto
= reloc_entry
->howto
;
156 asection
*output_section
;
157 bfd_boolean relocatable
= (output_bfd
!= NULL
);
159 /* Is the address of the relocation really within the section? */
160 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
161 return bfd_reloc_outofrange
;
163 if (bfd_is_und_section (symbol
->section
)
164 && (symbol
->flags
& BSF_WEAK
) == 0
166 return bfd_reloc_undefined
;
168 output_section
= symbol
->section
->output_section
;
169 relocation
= symbol
->value
;
171 /* Convert input-section-relative symbol value to absolute. */
175 output_base
= output_section
->vma
;
177 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
178 relocation
+= output_base
+ symbol
->section
->output_offset
;
180 /* Add in supplied addend. */
181 relocation
+= reloc_entry
->addend
;
185 reloc_entry
->address
+= input_section
->output_offset
;
186 reloc_entry
->addend
+= symbol
->section
->output_offset
;
190 reloc_entry
->addend
= 0;
193 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
195 bfd_reloc_status_type flag
;
196 flag
= bfd_check_overflow (howto
->complain_on_overflow
,
199 bfd_arch_bits_per_address(abfd
),
201 if (flag
!= bfd_reloc_ok
)
205 /* Here the variable relocation holds the final address of the
206 symbol we are relocating against, plus any addend. */
208 relocation
>>= (bfd_vma
) howto
->rightshift
;
210 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ reloc_addr
);
215 static bfd_reloc_status_type
216 bfin_byte4_reloc (bfd
*abfd
,
217 arelent
*reloc_entry
,
220 asection
*input_section
,
222 char **error_message ATTRIBUTE_UNUSED
)
224 bfd_vma relocation
, x
;
225 bfd_size_type addr
= reloc_entry
->address
;
226 bfd_vma output_base
= 0;
227 asection
*output_section
;
228 bfd_boolean relocatable
= (output_bfd
!= NULL
);
230 /* Is the address of the relocation really within the section? */
231 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
232 return bfd_reloc_outofrange
;
234 if (bfd_is_und_section (symbol
->section
)
235 && (symbol
->flags
& BSF_WEAK
) == 0
237 return bfd_reloc_undefined
;
239 output_section
= symbol
->section
->output_section
;
240 relocation
= symbol
->value
;
241 /* Convert input-section-relative symbol value to absolute. */
245 output_base
= output_section
->vma
;
248 && symbol
->section
->name
249 && !strcmp (symbol
->name
, symbol
->section
->name
))
252 relocation
+= output_base
+ symbol
->section
->output_offset
;
255 relocation
+= reloc_entry
->addend
;
259 /* This output will be relocatable ... like ld -r. */
260 reloc_entry
->address
+= input_section
->output_offset
;
261 reloc_entry
->addend
+= symbol
->section
->output_offset
;
265 reloc_entry
->addend
= 0;
268 /* Here the variable relocation holds the final address of the
269 symbol we are relocating against, plus any addend. */
270 x
= relocation
& 0xFFFF0000;
272 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
+ 2);
274 x
= relocation
& 0x0000FFFF;
275 bfd_put_16 (abfd
, x
, (unsigned char *) data
+ addr
);
279 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
280 Use this instead of bfd_perform_relocation. */
281 static bfd_reloc_status_type
282 bfin_bfd_reloc (bfd
*abfd
,
283 arelent
*reloc_entry
,
286 asection
*input_section
,
288 char **error_message ATTRIBUTE_UNUSED
)
291 bfd_size_type addr
= reloc_entry
->address
;
292 bfd_vma output_base
= 0;
293 reloc_howto_type
*howto
= reloc_entry
->howto
;
294 asection
*output_section
;
295 bfd_boolean relocatable
= (output_bfd
!= NULL
);
297 /* Is the address of the relocation really within the section? */
298 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
299 return bfd_reloc_outofrange
;
301 if (bfd_is_und_section (symbol
->section
)
302 && (symbol
->flags
& BSF_WEAK
) == 0
304 return bfd_reloc_undefined
;
306 /* Get symbol value. (Common symbols are special.) */
307 if (bfd_is_com_section (symbol
->section
))
310 relocation
= symbol
->value
;
312 output_section
= symbol
->section
->output_section
;
314 /* Convert input-section-relative symbol value to absolute. */
318 output_base
= output_section
->vma
;
320 if (!relocatable
|| !strcmp (symbol
->name
, symbol
->section
->name
))
321 relocation
+= output_base
+ symbol
->section
->output_offset
;
323 if (!relocatable
&& !strcmp (symbol
->name
, symbol
->section
->name
))
325 /* Add in supplied addend. */
326 relocation
+= reloc_entry
->addend
;
329 /* Here the variable relocation holds the final address of the
330 symbol we are relocating against, plus any addend. */
332 if (howto
->pc_relative
)
334 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
336 if (howto
->pcrel_offset
)
337 relocation
-= reloc_entry
->address
;
342 reloc_entry
->address
+= input_section
->output_offset
;
343 reloc_entry
->addend
+= symbol
->section
->output_offset
;
346 if (howto
->complain_on_overflow
!= complain_overflow_dont
)
348 bfd_reloc_status_type status
;
350 status
= bfd_check_overflow (howto
->complain_on_overflow
,
353 bfd_arch_bits_per_address(abfd
),
355 if (status
!= bfd_reloc_ok
)
359 /* If rightshift is 1 and the number odd, return error. */
360 if (howto
->rightshift
&& (relocation
& 0x01))
362 _bfd_error_handler (_("relocation should be even number"));
363 return bfd_reloc_overflow
;
366 relocation
>>= (bfd_vma
) howto
->rightshift
;
368 /* Shift everything up to where it's going to be used. */
370 relocation
<<= (bfd_vma
) howto
->bitpos
;
373 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
375 /* handle 8 and 16 bit relocations here. */
380 char x
= bfd_get_8 (abfd
, (char *) data
+ addr
);
382 bfd_put_8 (abfd
, x
, (unsigned char *) data
+ addr
);
388 unsigned short x
= bfd_get_16 (abfd
, (bfd_byte
*) data
+ addr
);
390 bfd_put_16 (abfd
, (bfd_vma
) x
, (unsigned char *) data
+ addr
);
395 return bfd_reloc_other
;
401 /* HOWTO Table for blackfin.
402 Blackfin relocations are fairly complicated.
403 Some of the salient features are
404 a. Even numbered offsets. A number of (not all) relocations are
405 even numbered. This means that the rightmost bit is not stored.
406 Needs to right shift by 1 and check to see if value is not odd
407 b. A relocation can be an expression. An expression takes on
408 a variety of relocations arranged in a stack.
409 As a result, we cannot use the standard generic function as special
410 function. We will have our own, which is very similar to the standard
411 generic function except that it understands how to get the value from
412 the relocation stack. . */
414 #define BFIN_RELOC_MIN 0
415 #define BFIN_RELOC_MAX 0x21
416 #define BFIN_GNUEXT_RELOC_MIN 0x40
417 #define BFIN_GNUEXT_RELOC_MAX 0x43
418 #define BFIN_ARELOC_MIN 0xE0
419 #define BFIN_ARELOC_MAX 0xF3
421 static reloc_howto_type bfin_howto_table
[] =
423 /* This reloc does nothing. . */
424 HOWTO (R_BFIN_UNUSED0
, /* type. */
426 3, /* size (0 = byte, 1 = short, 2 = long). */
428 FALSE
, /* pc_relative. */
430 complain_overflow_dont
, /* complain_on_overflow. */
431 bfd_elf_generic_reloc
, /* special_function. */
432 "R_BFIN_UNUSED0", /* name. */
433 FALSE
, /* partial_inplace. */
436 FALSE
), /* pcrel_offset. */
438 HOWTO (R_BFIN_PCREL5M2
, /* type. */
440 1, /* size (0 = byte, 1 = short, 2 = long).. */
442 TRUE
, /* pc_relative. */
444 complain_overflow_unsigned
, /* complain_on_overflow. */
445 bfin_bfd_reloc
, /* special_function. */
446 "R_BFIN_PCREL5M2", /* name. */
447 FALSE
, /* partial_inplace. */
449 0x0000000F, /* dst_mask. */
450 FALSE
), /* pcrel_offset. */
452 HOWTO (R_BFIN_UNUSED1
, /* type. */
454 3, /* size (0 = byte, 1 = short, 2 = long). */
456 FALSE
, /* pc_relative. */
458 complain_overflow_dont
, /* complain_on_overflow. */
459 bfd_elf_generic_reloc
, /* special_function. */
460 "R_BFIN_UNUSED1", /* name. */
461 FALSE
, /* partial_inplace. */
464 FALSE
), /* pcrel_offset. */
466 HOWTO (R_BFIN_PCREL10
, /* type. */
468 1, /* size (0 = byte, 1 = short, 2 = long). */
470 TRUE
, /* pc_relative. */
472 complain_overflow_signed
, /* complain_on_overflow. */
473 bfin_bfd_reloc
, /* special_function. */
474 "R_BFIN_PCREL10", /* name. */
475 FALSE
, /* partial_inplace. */
477 0x000003FF, /* dst_mask. */
478 TRUE
), /* pcrel_offset. */
480 HOWTO (R_BFIN_PCREL12_JUMP
, /* type. */
482 /* the offset is actually 13 bit
483 aligned on a word boundary so
484 only 12 bits have to be used.
485 Right shift the rightmost bit.. */
486 1, /* size (0 = byte, 1 = short, 2 = long). */
488 TRUE
, /* pc_relative. */
490 complain_overflow_signed
, /* complain_on_overflow. */
491 bfin_bfd_reloc
, /* special_function. */
492 "R_BFIN_PCREL12_JUMP", /* name. */
493 FALSE
, /* partial_inplace. */
495 0x0FFF, /* dst_mask. */
496 TRUE
), /* pcrel_offset. */
498 HOWTO (R_BFIN_RIMM16
, /* type. */
500 1, /* size (0 = byte, 1 = short, 2 = long). */
502 FALSE
, /* pc_relative. */
504 complain_overflow_signed
, /* complain_on_overflow. */
505 bfin_imm16_reloc
, /* special_function. */
506 "R_BFIN_RIMM16", /* name. */
507 FALSE
, /* partial_inplace. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE
), /* pcrel_offset. */
512 HOWTO (R_BFIN_LUIMM16
, /* type. */
514 1, /* size (0 = byte, 1 = short, 2 = long). */
516 FALSE
, /* pc_relative. */
518 complain_overflow_dont
, /* complain_on_overflow. */
519 bfin_imm16_reloc
, /* special_function. */
520 "R_BFIN_LUIMM16", /* name. */
521 FALSE
, /* partial_inplace. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE
), /* pcrel_offset. */
526 HOWTO (R_BFIN_HUIMM16
, /* type. */
527 16, /* rightshift. */
528 1, /* size (0 = byte, 1 = short, 2 = long). */
530 FALSE
, /* pc_relative. */
532 complain_overflow_unsigned
, /* complain_on_overflow. */
533 bfin_imm16_reloc
, /* special_function. */
534 "R_BFIN_HUIMM16", /* name. */
535 FALSE
, /* partial_inplace. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE
), /* pcrel_offset. */
540 HOWTO (R_BFIN_PCREL12_JUMP_S
, /* type. */
542 1, /* size (0 = byte, 1 = short, 2 = long). */
544 TRUE
, /* pc_relative. */
546 complain_overflow_signed
, /* complain_on_overflow. */
547 bfin_bfd_reloc
, /* special_function. */
548 "R_BFIN_PCREL12_JUMP_S", /* name. */
549 FALSE
, /* partial_inplace. */
551 0x00000FFF, /* dst_mask. */
552 TRUE
), /* pcrel_offset. */
554 HOWTO (R_BFIN_PCREL24_JUMP_X
, /* type. */
556 2, /* size (0 = byte, 1 = short, 2 = long). */
558 TRUE
, /* pc_relative. */
560 complain_overflow_signed
, /* complain_on_overflow. */
561 bfin_pcrel24_reloc
, /* special_function. */
562 "R_BFIN_PCREL24_JUMP_X", /* name. */
563 FALSE
, /* partial_inplace. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE
), /* pcrel_offset. */
568 HOWTO (R_BFIN_PCREL24
, /* type. */
570 2, /* size (0 = byte, 1 = short, 2 = long). */
572 TRUE
, /* pc_relative. */
574 complain_overflow_signed
, /* complain_on_overflow. */
575 bfin_pcrel24_reloc
, /* special_function. */
576 "R_BFIN_PCREL24", /* name. */
577 FALSE
, /* partial_inplace. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE
), /* pcrel_offset. */
582 HOWTO (R_BFIN_UNUSEDB
, /* type. */
584 3, /* size (0 = byte, 1 = short, 2 = long). */
586 FALSE
, /* pc_relative. */
588 complain_overflow_dont
, /* complain_on_overflow. */
589 bfd_elf_generic_reloc
, /* special_function. */
590 "R_BFIN_UNUSEDB", /* name. */
591 FALSE
, /* partial_inplace. */
594 FALSE
), /* pcrel_offset. */
596 HOWTO (R_BFIN_UNUSEDC
, /* type. */
598 3, /* size (0 = byte, 1 = short, 2 = long). */
600 FALSE
, /* pc_relative. */
602 complain_overflow_dont
, /* complain_on_overflow. */
603 bfd_elf_generic_reloc
, /* special_function. */
604 "R_BFIN_UNUSEDC", /* name. */
605 FALSE
, /* partial_inplace. */
608 FALSE
), /* pcrel_offset. */
610 HOWTO (R_BFIN_PCREL24_JUMP_L
, /* type. */
612 2, /* size (0 = byte, 1 = short, 2 = long). */
614 TRUE
, /* pc_relative. */
616 complain_overflow_signed
, /* complain_on_overflow. */
617 bfin_pcrel24_reloc
, /* special_function. */
618 "R_BFIN_PCREL24_JUMP_L", /* name. */
619 FALSE
, /* partial_inplace. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE
), /* pcrel_offset. */
624 HOWTO (R_BFIN_PCREL24_CALL_X
, /* type. */
626 2, /* size (0 = byte, 1 = short, 2 = long). */
628 TRUE
, /* pc_relative. */
630 complain_overflow_signed
, /* complain_on_overflow. */
631 bfin_pcrel24_reloc
, /* special_function. */
632 "R_BFIN_PCREL24_CALL_X", /* name. */
633 FALSE
, /* partial_inplace. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE
), /* pcrel_offset. */
638 HOWTO (R_BFIN_VAR_EQ_SYMB
, /* type. */
640 2, /* size (0 = byte, 1 = short, 2 = long). */
642 FALSE
, /* pc_relative. */
644 complain_overflow_bitfield
, /* complain_on_overflow. */
645 bfin_bfd_reloc
, /* special_function. */
646 "R_BFIN_VAR_EQ_SYMB", /* name. */
647 FALSE
, /* partial_inplace. */
650 FALSE
), /* pcrel_offset. */
652 HOWTO (R_BFIN_BYTE_DATA
, /* type. */
654 0, /* size (0 = byte, 1 = short, 2 = long). */
656 FALSE
, /* pc_relative. */
658 complain_overflow_unsigned
, /* complain_on_overflow. */
659 bfin_bfd_reloc
, /* special_function. */
660 "R_BFIN_BYTE_DATA", /* name. */
661 FALSE
, /* partial_inplace. */
663 0xFF, /* dst_mask. */
664 TRUE
), /* pcrel_offset. */
666 HOWTO (R_BFIN_BYTE2_DATA
, /* type. */
668 1, /* size (0 = byte, 1 = short, 2 = long). */
670 FALSE
, /* pc_relative. */
672 complain_overflow_signed
, /* complain_on_overflow. */
673 bfin_bfd_reloc
, /* special_function. */
674 "R_BFIN_BYTE2_DATA", /* name. */
675 FALSE
, /* partial_inplace. */
677 0xFFFF, /* dst_mask. */
678 TRUE
), /* pcrel_offset. */
680 HOWTO (R_BFIN_BYTE4_DATA
, /* type. */
682 2, /* size (0 = byte, 1 = short, 2 = long). */
684 FALSE
, /* pc_relative. */
686 complain_overflow_unsigned
, /* complain_on_overflow. */
687 bfin_byte4_reloc
, /* special_function. */
688 "R_BFIN_BYTE4_DATA", /* name. */
689 FALSE
, /* partial_inplace. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE
), /* pcrel_offset. */
694 HOWTO (R_BFIN_PCREL11
, /* type. */
696 1, /* size (0 = byte, 1 = short, 2 = long). */
698 TRUE
, /* pc_relative. */
700 complain_overflow_unsigned
, /* complain_on_overflow. */
701 bfin_bfd_reloc
, /* special_function. */
702 "R_BFIN_PCREL11", /* name. */
703 FALSE
, /* partial_inplace. */
705 0x000003FF, /* dst_mask. */
706 FALSE
), /* pcrel_offset. */
709 /* A 18-bit signed operand with the GOT offset for the address of
711 HOWTO (R_BFIN_GOT17M4
, /* type */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
715 FALSE
, /* pc_relative */
717 complain_overflow_signed
, /* complain_on_overflow */
718 bfd_elf_generic_reloc
, /* special_function */
719 "R_BFIN_GOT17M4", /* name */
720 FALSE
, /* partial_inplace */
721 0xffff, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE
), /* pcrel_offset */
725 /* The upper 16 bits of the GOT offset for the address of the
727 HOWTO (R_BFIN_GOTHI
, /* type */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
731 FALSE
, /* pc_relative */
733 complain_overflow_dont
, /* complain_on_overflow */
734 bfd_elf_generic_reloc
, /* special_function */
735 "R_BFIN_GOTHI", /* name */
736 FALSE
, /* partial_inplace */
737 0xffff, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE
), /* pcrel_offset */
741 /* The lower 16 bits of the GOT offset for the address of the
743 HOWTO (R_BFIN_GOTLO
, /* type */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
747 FALSE
, /* pc_relative */
749 complain_overflow_dont
, /* complain_on_overflow */
750 bfd_elf_generic_reloc
, /* special_function */
751 "R_BFIN_GOTLO", /* name */
752 FALSE
, /* partial_inplace */
753 0xffff, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE
), /* pcrel_offset */
757 /* The 32-bit address of the canonical descriptor of a function. */
758 HOWTO (R_BFIN_FUNCDESC
, /* type */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
762 FALSE
, /* pc_relative */
764 complain_overflow_bitfield
, /* complain_on_overflow */
765 bfd_elf_generic_reloc
, /* special_function */
766 "R_BFIN_FUNCDESC", /* name */
767 FALSE
, /* partial_inplace */
768 0xffffffff, /* src_mask */
769 0xffffffff, /* dst_mask */
770 FALSE
), /* pcrel_offset */
772 /* A 12-bit signed operand with the GOT offset for the address of
773 canonical descriptor of a function. */
774 HOWTO (R_BFIN_FUNCDESC_GOT17M4
, /* type */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
778 FALSE
, /* pc_relative */
780 complain_overflow_signed
, /* complain_on_overflow */
781 bfd_elf_generic_reloc
, /* special_function */
782 "R_BFIN_FUNCDESC_GOT17M4", /* name */
783 FALSE
, /* partial_inplace */
784 0xffff, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE
), /* pcrel_offset */
788 /* The upper 16 bits of the GOT offset for the address of the
789 canonical descriptor of a function. */
790 HOWTO (R_BFIN_FUNCDESC_GOTHI
, /* type */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
794 FALSE
, /* pc_relative */
796 complain_overflow_dont
, /* complain_on_overflow */
797 bfd_elf_generic_reloc
, /* special_function */
798 "R_BFIN_FUNCDESC_GOTHI", /* name */
799 FALSE
, /* partial_inplace */
800 0xffff, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE
), /* pcrel_offset */
804 /* The lower 16 bits of the GOT offset for the address of the
805 canonical descriptor of a function. */
806 HOWTO (R_BFIN_FUNCDESC_GOTLO
, /* type */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
810 FALSE
, /* pc_relative */
812 complain_overflow_dont
, /* complain_on_overflow */
813 bfd_elf_generic_reloc
, /* special_function */
814 "R_BFIN_FUNCDESC_GOTLO", /* name */
815 FALSE
, /* partial_inplace */
816 0xffff, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE
), /* pcrel_offset */
820 /* The 32-bit address of the canonical descriptor of a function. */
821 HOWTO (R_BFIN_FUNCDESC_VALUE
, /* type */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
825 FALSE
, /* pc_relative */
827 complain_overflow_bitfield
, /* complain_on_overflow */
828 bfd_elf_generic_reloc
, /* special_function */
829 "R_BFIN_FUNCDESC_VALUE", /* name */
830 FALSE
, /* partial_inplace */
831 0xffffffff, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE
), /* pcrel_offset */
835 /* A 12-bit signed operand with the GOT offset for the address of
836 canonical descriptor of a function. */
837 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4
, /* type */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
841 FALSE
, /* pc_relative */
843 complain_overflow_signed
, /* complain_on_overflow */
844 bfd_elf_generic_reloc
, /* special_function */
845 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
846 FALSE
, /* partial_inplace */
847 0xffff, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE
), /* pcrel_offset */
851 /* The upper 16 bits of the GOT offset for the address of the
852 canonical descriptor of a function. */
853 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI
, /* type */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
857 FALSE
, /* pc_relative */
859 complain_overflow_dont
, /* complain_on_overflow */
860 bfd_elf_generic_reloc
, /* special_function */
861 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
862 FALSE
, /* partial_inplace */
863 0xffff, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE
), /* pcrel_offset */
867 /* The lower 16 bits of the GOT offset for the address of the
868 canonical descriptor of a function. */
869 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO
, /* type */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
873 FALSE
, /* pc_relative */
875 complain_overflow_dont
, /* complain_on_overflow */
876 bfd_elf_generic_reloc
, /* special_function */
877 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
878 FALSE
, /* partial_inplace */
879 0xffff, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE
), /* pcrel_offset */
883 /* A 12-bit signed operand with the GOT offset for the address of
885 HOWTO (R_BFIN_GOTOFF17M4
, /* type */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
889 FALSE
, /* pc_relative */
891 complain_overflow_signed
, /* complain_on_overflow */
892 bfd_elf_generic_reloc
, /* special_function */
893 "R_BFIN_GOTOFF17M4", /* name */
894 FALSE
, /* partial_inplace */
895 0xffff, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE
), /* pcrel_offset */
899 /* The upper 16 bits of the GOT offset for the address of the
901 HOWTO (R_BFIN_GOTOFFHI
, /* type */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
905 FALSE
, /* pc_relative */
907 complain_overflow_dont
, /* complain_on_overflow */
908 bfd_elf_generic_reloc
, /* special_function */
909 "R_BFIN_GOTOFFHI", /* name */
910 FALSE
, /* partial_inplace */
911 0xffff, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE
), /* pcrel_offset */
915 /* The lower 16 bits of the GOT offset for the address of the
917 HOWTO (R_BFIN_GOTOFFLO
, /* type */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
921 FALSE
, /* pc_relative */
923 complain_overflow_dont
, /* complain_on_overflow */
924 bfd_elf_generic_reloc
, /* special_function */
925 "R_BFIN_GOTOFFLO", /* name */
926 FALSE
, /* partial_inplace */
927 0xffff, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE
), /* pcrel_offset */
932 static reloc_howto_type bfin_gnuext_howto_table
[] =
934 HOWTO (R_BFIN_PLTPC
, /* type. */
936 1, /* size (0 = byte, 1 = short, 2 = long). */
938 FALSE
, /* pc_relative. */
940 complain_overflow_bitfield
, /* complain_on_overflow. */
941 bfin_pltpc_reloc
, /* special_function. */
942 "R_BFIN_PLTPC", /* name. */
943 FALSE
, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE
), /* pcrel_offset. */
948 HOWTO (R_BFIN_GOT
, /* type. */
950 1, /* size (0 = byte, 1 = short, 2 = long). */
952 FALSE
, /* pc_relative. */
954 complain_overflow_bitfield
, /* complain_on_overflow. */
955 bfd_elf_generic_reloc
, /* special_function. */
956 "R_BFIN_GOT", /* name. */
957 FALSE
, /* partial_inplace. */
958 0x7fff, /* src_mask. */
959 0x7fff, /* dst_mask. */
960 FALSE
), /* pcrel_offset. */
962 /* GNU extension to record C++ vtable hierarchy. */
963 HOWTO (R_BFIN_GNU_VTINHERIT
, /* type. */
965 2, /* size (0 = byte, 1 = short, 2 = long). */
967 FALSE
, /* pc_relative. */
969 complain_overflow_dont
, /* complain_on_overflow. */
970 NULL
, /* special_function. */
971 "R_BFIN_GNU_VTINHERIT", /* name. */
972 FALSE
, /* partial_inplace. */
975 FALSE
), /* pcrel_offset. */
977 /* GNU extension to record C++ vtable member usage. */
978 HOWTO (R_BFIN_GNU_VTENTRY
, /* type. */
980 2, /* size (0 = byte, 1 = short, 2 = long). */
982 FALSE
, /* pc_relative. */
984 complain_overflow_dont
, /* complain_on_overflow. */
985 _bfd_elf_rel_vtable_reloc_fn
, /* special_function. */
986 "R_BFIN_GNU_VTENTRY", /* name. */
987 FALSE
, /* partial_inplace. */
990 FALSE
) /* pcrel_offset. */
993 struct bfin_reloc_map
995 bfd_reloc_code_real_type bfd_reloc_val
;
996 unsigned int bfin_reloc_val
;
999 static const struct bfin_reloc_map bfin_reloc_map
[] =
1001 { BFD_RELOC_NONE
, R_BFIN_UNUSED0
},
1002 { BFD_RELOC_BFIN_5_PCREL
, R_BFIN_PCREL5M2
},
1003 { BFD_RELOC_NONE
, R_BFIN_UNUSED1
},
1004 { BFD_RELOC_BFIN_10_PCREL
, R_BFIN_PCREL10
},
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP
, R_BFIN_PCREL12_JUMP
},
1006 { BFD_RELOC_BFIN_16_IMM
, R_BFIN_RIMM16
},
1007 { BFD_RELOC_BFIN_16_LOW
, R_BFIN_LUIMM16
},
1008 { BFD_RELOC_BFIN_16_HIGH
, R_BFIN_HUIMM16
},
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S
, R_BFIN_PCREL12_JUMP_S
},
1010 { BFD_RELOC_24_PCREL
, R_BFIN_PCREL24
},
1011 { BFD_RELOC_24_PCREL
, R_BFIN_PCREL24
},
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L
, R_BFIN_PCREL24_JUMP_L
},
1013 { BFD_RELOC_NONE
, R_BFIN_UNUSEDB
},
1014 { BFD_RELOC_NONE
, R_BFIN_UNUSEDC
},
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X
, R_BFIN_PCREL24_CALL_X
},
1016 { BFD_RELOC_8
, R_BFIN_BYTE_DATA
},
1017 { BFD_RELOC_16
, R_BFIN_BYTE2_DATA
},
1018 { BFD_RELOC_32
, R_BFIN_BYTE4_DATA
},
1019 { BFD_RELOC_BFIN_11_PCREL
, R_BFIN_PCREL11
},
1020 { BFD_RELOC_BFIN_GOT
, R_BFIN_GOT
},
1021 { BFD_RELOC_BFIN_PLTPC
, R_BFIN_PLTPC
},
1023 { BFD_RELOC_BFIN_GOT17M4
, R_BFIN_GOT17M4
},
1024 { BFD_RELOC_BFIN_GOTHI
, R_BFIN_GOTHI
},
1025 { BFD_RELOC_BFIN_GOTLO
, R_BFIN_GOTLO
},
1026 { BFD_RELOC_BFIN_FUNCDESC
, R_BFIN_FUNCDESC
},
1027 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4
, R_BFIN_FUNCDESC_GOT17M4
},
1028 { BFD_RELOC_BFIN_FUNCDESC_GOTHI
, R_BFIN_FUNCDESC_GOTHI
},
1029 { BFD_RELOC_BFIN_FUNCDESC_GOTLO
, R_BFIN_FUNCDESC_GOTLO
},
1030 { BFD_RELOC_BFIN_FUNCDESC_VALUE
, R_BFIN_FUNCDESC_VALUE
},
1031 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4
, R_BFIN_FUNCDESC_GOTOFF17M4
},
1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI
, R_BFIN_FUNCDESC_GOTOFFHI
},
1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO
, R_BFIN_FUNCDESC_GOTOFFLO
},
1034 { BFD_RELOC_BFIN_GOTOFF17M4
, R_BFIN_GOTOFF17M4
},
1035 { BFD_RELOC_BFIN_GOTOFFHI
, R_BFIN_GOTOFFHI
},
1036 { BFD_RELOC_BFIN_GOTOFFLO
, R_BFIN_GOTOFFLO
},
1038 { BFD_RELOC_VTABLE_INHERIT
, R_BFIN_GNU_VTINHERIT
},
1039 { BFD_RELOC_VTABLE_ENTRY
, R_BFIN_GNU_VTENTRY
},
1044 bfin_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
1046 Elf_Internal_Rela
*dst
)
1048 unsigned int r_type
;
1050 r_type
= ELF32_R_TYPE (dst
->r_info
);
1052 if (r_type
<= BFIN_RELOC_MAX
)
1053 cache_ptr
->howto
= &bfin_howto_table
[r_type
];
1055 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1056 cache_ptr
->howto
= &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1059 cache_ptr
->howto
= (reloc_howto_type
*) NULL
;
1062 /* Given a BFD reloc type, return the howto. */
1063 static reloc_howto_type
*
1064 bfin_bfd_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1065 bfd_reloc_code_real_type code
)
1068 unsigned int r_type
= (unsigned int) -1;
1070 for (i
= sizeof (bfin_reloc_map
) / sizeof (bfin_reloc_map
[0]); i
--;)
1071 if (bfin_reloc_map
[i
].bfd_reloc_val
== code
)
1072 r_type
= bfin_reloc_map
[i
].bfin_reloc_val
;
1074 if (r_type
<= BFIN_RELOC_MAX
)
1075 return &bfin_howto_table
[r_type
];
1077 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1078 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1080 return (reloc_howto_type
*) NULL
;
1083 static reloc_howto_type
*
1084 bfin_bfd_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1090 i
< (sizeof (bfin_howto_table
)
1091 / sizeof (bfin_howto_table
[0]));
1093 if (bfin_howto_table
[i
].name
!= NULL
1094 && strcasecmp (bfin_howto_table
[i
].name
, r_name
) == 0)
1095 return &bfin_howto_table
[i
];
1098 i
< (sizeof (bfin_gnuext_howto_table
)
1099 / sizeof (bfin_gnuext_howto_table
[0]));
1101 if (bfin_gnuext_howto_table
[i
].name
!= NULL
1102 && strcasecmp (bfin_gnuext_howto_table
[i
].name
, r_name
) == 0)
1103 return &bfin_gnuext_howto_table
[i
];
1108 /* Given a bfin relocation type, return the howto. */
1109 static reloc_howto_type
*
1110 bfin_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1111 unsigned int r_type
)
1113 if (r_type
<= BFIN_RELOC_MAX
)
1114 return &bfin_howto_table
[r_type
];
1116 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1117 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1119 return (reloc_howto_type
*) NULL
;
1122 /* Set by ld emulation if --code-in-l1. */
1123 bfd_boolean elf32_bfin_code_in_l1
= 0;
1125 /* Set by ld emulation if --data-in-l1. */
1126 bfd_boolean elf32_bfin_data_in_l1
= 0;
1129 elf32_bfin_final_write_processing (bfd
*abfd
,
1130 bfd_boolean linker ATTRIBUTE_UNUSED
)
1132 if (elf32_bfin_code_in_l1
)
1133 elf_elfheader (abfd
)->e_flags
|= EF_BFIN_CODE_IN_L1
;
1134 if (elf32_bfin_data_in_l1
)
1135 elf_elfheader (abfd
)->e_flags
|= EF_BFIN_DATA_IN_L1
;
1138 /* Return TRUE if the name is a local label.
1139 bfin local labels begin with L$. */
1141 bfin_is_local_label_name (bfd
*abfd
, const char *label
)
1143 if (label
[0] == 'L' && label
[1] == '$' )
1146 return _bfd_elf_is_local_label_name (abfd
, label
);
1149 /* Look through the relocs for a section during the first phase, and
1150 allocate space in the global offset table or procedure linkage
1154 bfin_check_relocs (bfd
* abfd
,
1155 struct bfd_link_info
*info
,
1157 const Elf_Internal_Rela
*relocs
)
1160 Elf_Internal_Shdr
*symtab_hdr
;
1161 struct elf_link_hash_entry
**sym_hashes
;
1162 bfd_signed_vma
*local_got_refcounts
;
1163 const Elf_Internal_Rela
*rel
;
1164 const Elf_Internal_Rela
*rel_end
;
1168 if (bfd_link_relocatable (info
))
1171 dynobj
= elf_hash_table (info
)->dynobj
;
1172 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1173 sym_hashes
= elf_sym_hashes (abfd
);
1174 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1179 rel_end
= relocs
+ sec
->reloc_count
;
1180 for (rel
= relocs
; rel
< rel_end
; rel
++)
1182 unsigned long r_symndx
;
1183 struct elf_link_hash_entry
*h
;
1185 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1186 if (r_symndx
< symtab_hdr
->sh_info
)
1190 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1193 switch (ELF32_R_TYPE (rel
->r_info
))
1195 /* This relocation describes the C++ object vtable hierarchy.
1196 Reconstruct it for later use during GC. */
1197 case R_BFIN_GNU_VTINHERIT
:
1198 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1202 /* This relocation describes which C++ vtable entries
1203 are actually used. Record for later use during GC. */
1204 case R_BFIN_GNU_VTENTRY
:
1205 BFD_ASSERT (h
!= NULL
);
1207 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1213 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1219 /* Create the .got section. */
1220 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1221 if (!_bfd_elf_create_got_section (dynobj
, info
))
1225 sgot
= elf_hash_table (info
)->sgot
;
1226 srelgot
= elf_hash_table (info
)->srelgot
;
1227 BFD_ASSERT (sgot
!= NULL
);
1231 if (h
->got
.refcount
== 0)
1233 /* Make sure this symbol is output as a dynamic symbol. */
1234 if (h
->dynindx
== -1 && !h
->forced_local
)
1236 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
1240 /* Allocate space in the .got section. */
1242 /* Allocate relocation space. */
1243 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1249 /* This is a global offset table entry for a local symbol. */
1250 if (local_got_refcounts
== NULL
)
1254 size
= symtab_hdr
->sh_info
;
1255 size
*= sizeof (bfd_signed_vma
);
1256 local_got_refcounts
= ((bfd_signed_vma
*)
1257 bfd_zalloc (abfd
, size
));
1258 if (local_got_refcounts
== NULL
)
1260 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1262 if (local_got_refcounts
[r_symndx
] == 0)
1265 if (bfd_link_pic (info
))
1267 /* If we are generating a shared object, we need to
1268 output a R_68K_RELATIVE reloc so that the dynamic
1269 linker can adjust this GOT entry. */
1270 srelgot
->size
+= sizeof (Elf32_External_Rela
);
1273 local_got_refcounts
[r_symndx
]++;
1285 static enum elf_reloc_type_class
1286 elf32_bfin_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1287 const asection
*rel_sec ATTRIBUTE_UNUSED
,
1288 const Elf_Internal_Rela
* rela
)
1290 switch ((int) ELF32_R_TYPE (rela
->r_info
))
1293 return reloc_class_normal
;
1297 static bfd_reloc_status_type
1298 bfin_final_link_relocate (Elf_Internal_Rela
*rel
, reloc_howto_type
*howto
,
1299 bfd
*input_bfd
, asection
*input_section
,
1300 bfd_byte
*contents
, bfd_vma address
,
1301 bfd_vma value
, bfd_vma addend
)
1303 int r_type
= ELF32_R_TYPE (rel
->r_info
);
1305 if (r_type
== R_BFIN_PCREL24
|| r_type
== R_BFIN_PCREL24_JUMP_L
)
1307 bfd_reloc_status_type r
= bfd_reloc_ok
;
1310 if (address
> bfd_get_section_limit (input_bfd
, input_section
))
1311 return bfd_reloc_outofrange
;
1315 /* Perform usual pc-relative correction. */
1316 value
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
1319 /* We are getting reloc_entry->address 2 byte off from
1320 the start of instruction. Assuming absolute postion
1321 of the reloc data. But, following code had been written assuming
1322 reloc address is starting at begining of instruction.
1323 To compensate that I have increased the value of
1324 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1329 if ((value
& 0xFF000000) != 0
1330 && (value
& 0xFF000000) != 0xFF000000)
1331 r
= bfd_reloc_overflow
;
1335 x
= bfd_get_16 (input_bfd
, contents
+ address
);
1336 x
= (x
& 0xff00) | ((value
>> 16) & 0xff);
1337 bfd_put_16 (input_bfd
, x
, contents
+ address
);
1339 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
1341 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
1345 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
, contents
,
1346 rel
->r_offset
, value
, addend
);
1351 bfin_relocate_section (bfd
* output_bfd
,
1352 struct bfd_link_info
*info
,
1354 asection
* input_section
,
1355 bfd_byte
* contents
,
1356 Elf_Internal_Rela
* relocs
,
1357 Elf_Internal_Sym
* local_syms
,
1358 asection
** local_sections
)
1361 Elf_Internal_Shdr
*symtab_hdr
;
1362 struct elf_link_hash_entry
**sym_hashes
;
1363 bfd_vma
*local_got_offsets
;
1365 Elf_Internal_Rela
*rel
;
1366 Elf_Internal_Rela
*relend
;
1369 dynobj
= elf_hash_table (info
)->dynobj
;
1370 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
1371 sym_hashes
= elf_sym_hashes (input_bfd
);
1372 local_got_offsets
= elf_local_got_offsets (input_bfd
);
1377 relend
= relocs
+ input_section
->reloc_count
;
1378 for (; rel
< relend
; rel
++, i
++)
1381 reloc_howto_type
*howto
;
1382 unsigned long r_symndx
;
1383 struct elf_link_hash_entry
*h
;
1384 Elf_Internal_Sym
*sym
;
1386 bfd_vma relocation
= 0;
1387 bfd_boolean unresolved_reloc
;
1388 bfd_reloc_status_type r
;
1391 r_type
= ELF32_R_TYPE (rel
->r_info
);
1392 if (r_type
< 0 || r_type
>= 243)
1394 bfd_set_error (bfd_error_bad_value
);
1398 if (r_type
== R_BFIN_GNU_VTENTRY
1399 || r_type
== R_BFIN_GNU_VTINHERIT
)
1402 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
1405 bfd_set_error (bfd_error_bad_value
);
1408 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1413 unresolved_reloc
= FALSE
;
1415 if (r_symndx
< symtab_hdr
->sh_info
)
1417 sym
= local_syms
+ r_symndx
;
1418 sec
= local_sections
[r_symndx
];
1419 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1423 bfd_boolean warned
, ignored
;
1425 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
1426 r_symndx
, symtab_hdr
, sym_hashes
,
1428 unresolved_reloc
, warned
, ignored
);
1431 if (sec
!= NULL
&& discarded_section (sec
))
1432 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
1433 rel
, 1, relend
, howto
, 0, contents
);
1435 if (bfd_link_relocatable (info
))
1438 address
= rel
->r_offset
;
1440 /* Then, process normally. */
1443 case R_BFIN_GNU_VTINHERIT
:
1444 case R_BFIN_GNU_VTENTRY
:
1445 return bfd_reloc_ok
;
1448 /* Relocation is to the address of the entry for this symbol
1449 in the global offset table. */
1451 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1454 /* Relocation is the offset of the entry for this symbol in
1455 the global offset table. */
1462 /* Create the .got section. */
1463 elf_hash_table (info
)->dynobj
= dynobj
= output_bfd
;
1464 if (!_bfd_elf_create_got_section (dynobj
, info
))
1468 sgot
= elf_hash_table (info
)->sgot
;
1469 BFD_ASSERT (sgot
!= NULL
);
1475 off
= h
->got
.offset
;
1476 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1477 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
1479 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
1480 bfd_link_pic (info
),
1482 || (bfd_link_pic (info
)
1488 /* This is actually a static link, or it is a
1489 -Bsymbolic link and the symbol is defined
1490 locally, or the symbol was forced to be local
1491 because of a version file.. We must initialize
1492 this entry in the global offset table. Since
1493 the offset must always be a multiple of 4, we
1494 use the least significant bit to record whether
1495 we have initialized it already.
1497 When doing a dynamic link, we create a .rela.got
1498 relocation entry to initialize the value. This
1499 is done in the finish_dynamic_symbol routine. */
1504 bfd_put_32 (output_bfd
, relocation
,
1505 sgot
->contents
+ off
);
1510 unresolved_reloc
= FALSE
;
1514 BFD_ASSERT (local_got_offsets
!= NULL
);
1515 off
= local_got_offsets
[r_symndx
];
1516 BFD_ASSERT (off
!= (bfd_vma
) - 1);
1518 /* The offset must always be a multiple of 4. We use
1519 the least significant bit to record whether we have
1520 already generated the necessary reloc. */
1525 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
1527 if (bfd_link_pic (info
))
1530 Elf_Internal_Rela outrel
;
1533 s
= elf_hash_table (info
)->srelgot
;
1534 BFD_ASSERT (s
!= NULL
);
1536 outrel
.r_offset
= (sgot
->output_section
->vma
1537 + sgot
->output_offset
+ off
);
1539 ELF32_R_INFO (0, R_BFIN_PCREL24
);
1540 outrel
.r_addend
= relocation
;
1543 s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
1544 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
1547 local_got_offsets
[r_symndx
] |= 1;
1551 relocation
= sgot
->output_offset
+ off
;
1553 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1560 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
1562 relocation
, rel
->r_addend
);
1567 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1568 because such sections are not SEC_ALLOC and thus ld.so will
1569 not process them. */
1570 if (unresolved_reloc
1571 && !((input_section
->flags
& SEC_DEBUGGING
) != 0 && h
->def_dynamic
)
1572 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
1573 rel
->r_offset
) != (bfd_vma
) -1)
1576 /* xgettext:c-format */
1577 (_("%B(%A+%#Lx): unresolvable relocation against symbol `%s'"),
1579 input_section
, rel
->r_offset
, h
->root
.root
.string
);
1583 if (r
!= bfd_reloc_ok
)
1588 name
= h
->root
.root
.string
;
1591 name
= bfd_elf_string_from_elf_section (input_bfd
,
1592 symtab_hdr
->sh_link
,
1597 name
= bfd_section_name (input_bfd
, sec
);
1600 if (r
== bfd_reloc_overflow
)
1601 (*info
->callbacks
->reloc_overflow
)
1602 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
1603 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
1607 /* xgettext:c-format */
1608 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
1609 input_bfd
, input_section
, rel
->r_offset
, name
, (int) r
);
1619 bfin_gc_mark_hook (asection
* sec
,
1620 struct bfd_link_info
*info
,
1621 Elf_Internal_Rela
* rel
,
1622 struct elf_link_hash_entry
*h
,
1623 Elf_Internal_Sym
* sym
)
1626 switch (ELF32_R_TYPE (rel
->r_info
))
1628 case R_BFIN_GNU_VTINHERIT
:
1629 case R_BFIN_GNU_VTENTRY
:
1633 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1636 extern const bfd_target bfin_elf32_fdpic_vec
;
1637 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1639 /* An extension of the elf hash table data structure,
1640 containing some additional Blackfin-specific data. */
1641 struct bfinfdpic_elf_link_hash_table
1643 struct elf_link_hash_table elf
;
1645 /* A pointer to the .rofixup section. */
1646 asection
*sgotfixup
;
1647 /* GOT base offset. */
1649 /* Location of the first non-lazy PLT entry, i.e., the number of
1650 bytes taken by lazy PLT entries. */
1652 /* A hash table holding information about which symbols were
1653 referenced with which PIC-related relocations. */
1654 struct htab
*relocs_info
;
1655 /* Summary reloc information collected by
1656 _bfinfdpic_count_got_plt_entries. */
1657 struct _bfinfdpic_dynamic_got_info
*g
;
1660 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1662 #define bfinfdpic_hash_table(info) \
1663 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1664 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1666 #define bfinfdpic_got_section(info) \
1667 (bfinfdpic_hash_table (info)->elf.sgot)
1668 #define bfinfdpic_gotrel_section(info) \
1669 (bfinfdpic_hash_table (info)->elf.srelgot)
1670 #define bfinfdpic_gotfixup_section(info) \
1671 (bfinfdpic_hash_table (info)->sgotfixup)
1672 #define bfinfdpic_plt_section(info) \
1673 (bfinfdpic_hash_table (info)->elf.splt)
1674 #define bfinfdpic_pltrel_section(info) \
1675 (bfinfdpic_hash_table (info)->elf.srelplt)
1676 #define bfinfdpic_relocs_info(info) \
1677 (bfinfdpic_hash_table (info)->relocs_info)
1678 #define bfinfdpic_got_initial_offset(info) \
1679 (bfinfdpic_hash_table (info)->got0)
1680 #define bfinfdpic_plt_initial_offset(info) \
1681 (bfinfdpic_hash_table (info)->plt0)
1682 #define bfinfdpic_dynamic_got_plt_info(info) \
1683 (bfinfdpic_hash_table (info)->g)
1685 /* The name of the dynamic interpreter. This is put in the .interp
1688 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1690 #define DEFAULT_STACK_SIZE 0x20000
1692 /* This structure is used to collect the number of entries present in
1693 each addressable range of the got. */
1694 struct _bfinfdpic_dynamic_got_info
1696 /* Several bits of information about the current link. */
1697 struct bfd_link_info
*info
;
1698 /* Total size needed for GOT entries within the 18- or 32-bit
1700 bfd_vma got17m4
, gothilo
;
1701 /* Total size needed for function descriptor entries within the 18-
1702 or 32-bit ranges. */
1703 bfd_vma fd17m4
, fdhilo
;
1704 /* Total size needed function descriptor entries referenced in PLT
1705 entries, that would be profitable to place in offsets close to
1706 the PIC register. */
1708 /* Total size needed by lazy PLT entries. */
1710 /* Number of relocations carried over from input object files. */
1711 unsigned long relocs
;
1712 /* Number of fixups introduced by relocations in input object files. */
1713 unsigned long fixups
;
1716 /* Create a Blackfin ELF linker hash table. */
1718 static struct bfd_link_hash_table
*
1719 bfinfdpic_elf_link_hash_table_create (bfd
*abfd
)
1721 struct bfinfdpic_elf_link_hash_table
*ret
;
1722 bfd_size_type amt
= sizeof (struct bfinfdpic_elf_link_hash_table
);
1724 ret
= bfd_zmalloc (amt
);
1728 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1729 _bfd_elf_link_hash_newfunc
,
1730 sizeof (struct elf_link_hash_entry
),
1737 return &ret
->elf
.root
;
1740 /* Decide whether a reference to a symbol can be resolved locally or
1741 not. If the symbol is protected, we want the local address, but
1742 its function descriptor must be assigned by the dynamic linker. */
1743 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1744 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1745 || ! elf_hash_table (INFO)->dynamic_sections_created)
1746 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1747 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1749 /* This structure collects information on what kind of GOT, PLT or
1750 function descriptors are required by relocations that reference a
1752 struct bfinfdpic_relocs_info
1754 /* The index of the symbol, as stored in the relocation r_info, if
1755 we have a local symbol; -1 otherwise. */
1759 /* The input bfd in which the symbol is defined, if it's a local
1762 /* If symndx == -1, the hash table entry corresponding to a global
1763 symbol (even if it turns out to bind locally, in which case it
1764 should ideally be replaced with section's symndx + addend). */
1765 struct elf_link_hash_entry
*h
;
1767 /* The addend of the relocation that references the symbol. */
1770 /* The fields above are used to identify an entry. The fields below
1771 contain information on how an entry is used and, later on, which
1772 locations it was assigned. */
1773 /* The following 2 fields record whether the symbol+addend above was
1774 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1775 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1778 /* Whether a FUNCDESC relocation references symbol+addend. */
1780 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1783 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1784 unsigned fdgoff17m4
;
1785 unsigned fdgoffhilo
;
1786 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1787 GOTOFFHI relocations. The addend doesn't really matter, since we
1788 envision that this will only be used to check whether the symbol
1789 is mapped to the same segment as the got. */
1791 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1793 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1796 /* Whether we need a PLT entry for a symbol. Should be implied by
1798 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1800 /* Whether a function descriptor should be created in this link unit
1801 for symbol+addend. Should be implied by something like:
1802 (plt || fdgotoff17m4 || fdgotofflohi
1803 || ((fd || fdgot17m4 || fdgothilo)
1804 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1806 /* Whether a lazy PLT entry is needed for this symbol+addend.
1807 Should be implied by something like:
1808 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1809 && ! (info->flags & DF_BIND_NOW)) */
1811 /* Whether we've already emitted GOT relocations and PLT entries as
1812 needed for this symbol. */
1815 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1816 relocations referencing the symbol. */
1817 unsigned relocs32
, relocsfd
, relocsfdv
;
1819 /* The number of .rofixups entries and dynamic relocations allocated
1820 for this symbol, minus any that might have already been used. */
1821 unsigned fixups
, dynrelocs
;
1823 /* The offsets of the GOT entries assigned to symbol+addend, to the
1824 function descriptor's address, and to a function descriptor,
1825 respectively. Should be zero if unassigned. The offsets are
1826 counted from the value that will be assigned to the PIC register,
1827 not from the beginning of the .got section. */
1828 bfd_signed_vma got_entry
, fdgot_entry
, fd_entry
;
1829 /* The offsets of the PLT entries assigned to symbol+addend,
1830 non-lazy and lazy, respectively. If unassigned, should be
1832 bfd_vma plt_entry
, lzplt_entry
;
1835 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1837 bfinfdpic_relocs_info_hash (const void *entry_
)
1839 const struct bfinfdpic_relocs_info
*entry
= entry_
;
1841 return (entry
->symndx
== -1
1842 ? (long) entry
->d
.h
->root
.root
.hash
1843 : entry
->symndx
+ (long) entry
->d
.abfd
->id
* 257) + entry
->addend
;
1846 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1849 bfinfdpic_relocs_info_eq (const void *entry1
, const void *entry2
)
1851 const struct bfinfdpic_relocs_info
*e1
= entry1
;
1852 const struct bfinfdpic_relocs_info
*e2
= entry2
;
1854 return e1
->symndx
== e2
->symndx
&& e1
->addend
== e2
->addend
1855 && (e1
->symndx
== -1 ? e1
->d
.h
== e2
->d
.h
: e1
->d
.abfd
== e2
->d
.abfd
);
1858 /* Find or create an entry in a hash table HT that matches the key
1859 fields of the given ENTRY. If it's not found, memory for a new
1860 entry is allocated in ABFD's obstack. */
1861 static struct bfinfdpic_relocs_info
*
1862 bfinfdpic_relocs_info_find (struct htab
*ht
,
1864 const struct bfinfdpic_relocs_info
*entry
,
1865 enum insert_option insert
)
1867 struct bfinfdpic_relocs_info
**loc
;
1872 loc
= (struct bfinfdpic_relocs_info
**) htab_find_slot (ht
, entry
, insert
);
1880 *loc
= bfd_zalloc (abfd
, sizeof (**loc
));
1885 (*loc
)->symndx
= entry
->symndx
;
1886 (*loc
)->d
= entry
->d
;
1887 (*loc
)->addend
= entry
->addend
;
1888 (*loc
)->plt_entry
= (bfd_vma
)-1;
1889 (*loc
)->lzplt_entry
= (bfd_vma
)-1;
1894 /* Obtain the address of the entry in HT associated with H's symbol +
1895 addend, creating a new entry if none existed. ABFD is only used
1896 for memory allocation purposes. */
1897 inline static struct bfinfdpic_relocs_info
*
1898 bfinfdpic_relocs_info_for_global (struct htab
*ht
,
1900 struct elf_link_hash_entry
*h
,
1902 enum insert_option insert
)
1904 struct bfinfdpic_relocs_info entry
;
1908 entry
.addend
= addend
;
1910 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1913 /* Obtain the address of the entry in HT associated with the SYMNDXth
1914 local symbol of the input bfd ABFD, plus the addend, creating a new
1915 entry if none existed. */
1916 inline static struct bfinfdpic_relocs_info
*
1917 bfinfdpic_relocs_info_for_local (struct htab
*ht
,
1921 enum insert_option insert
)
1923 struct bfinfdpic_relocs_info entry
;
1925 entry
.symndx
= symndx
;
1926 entry
.d
.abfd
= abfd
;
1927 entry
.addend
= addend
;
1929 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1932 /* Merge fields set by check_relocs() of two entries that end up being
1933 mapped to the same (presumably global) symbol. */
1936 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info
*e2
,
1937 struct bfinfdpic_relocs_info
const *e1
)
1939 e2
->got17m4
|= e1
->got17m4
;
1940 e2
->gothilo
|= e1
->gothilo
;
1942 e2
->fdgot17m4
|= e1
->fdgot17m4
;
1943 e2
->fdgothilo
|= e1
->fdgothilo
;
1944 e2
->fdgoff17m4
|= e1
->fdgoff17m4
;
1945 e2
->fdgoffhilo
|= e1
->fdgoffhilo
;
1946 e2
->gotoff
|= e1
->gotoff
;
1947 e2
->call
|= e1
->call
;
1951 /* Every block of 65535 lazy PLT entries shares a single call to the
1952 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1953 32767, counting from 0). All other lazy PLT entries branch to it
1954 in a single instruction. */
1956 #define LZPLT_RESOLVER_EXTRA 10
1957 #define LZPLT_NORMAL_SIZE 6
1958 #define LZPLT_ENTRIES 1362
1960 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1961 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1963 /* Add a dynamic relocation to the SRELOC section. */
1965 inline static bfd_vma
1966 _bfinfdpic_add_dyn_reloc (bfd
*output_bfd
, asection
*sreloc
, bfd_vma offset
,
1967 int reloc_type
, long dynindx
, bfd_vma addend
,
1968 struct bfinfdpic_relocs_info
*entry
)
1970 Elf_Internal_Rela outrel
;
1971 bfd_vma reloc_offset
;
1973 outrel
.r_offset
= offset
;
1974 outrel
.r_info
= ELF32_R_INFO (dynindx
, reloc_type
);
1975 outrel
.r_addend
= addend
;
1977 reloc_offset
= sreloc
->reloc_count
* sizeof (Elf32_External_Rel
);
1978 BFD_ASSERT (reloc_offset
< sreloc
->size
);
1979 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1980 sreloc
->contents
+ reloc_offset
);
1981 sreloc
->reloc_count
++;
1983 /* If the entry's index is zero, this relocation was probably to a
1984 linkonce section that got discarded. We reserved a dynamic
1985 relocation, but it was for another entry than the one we got at
1986 the time of emitting the relocation. Unfortunately there's no
1987 simple way for us to catch this situation, since the relocation
1988 is cleared right before calling relocate_section, at which point
1989 we no longer know what the relocation used to point to. */
1992 BFD_ASSERT (entry
->dynrelocs
> 0);
1996 return reloc_offset
;
1999 /* Add a fixup to the ROFIXUP section. */
2002 _bfinfdpic_add_rofixup (bfd
*output_bfd
, asection
*rofixup
, bfd_vma offset
,
2003 struct bfinfdpic_relocs_info
*entry
)
2005 bfd_vma fixup_offset
;
2007 if (rofixup
->flags
& SEC_EXCLUDE
)
2010 fixup_offset
= rofixup
->reloc_count
* 4;
2011 if (rofixup
->contents
)
2013 BFD_ASSERT (fixup_offset
< rofixup
->size
);
2014 bfd_put_32 (output_bfd
, offset
, rofixup
->contents
+ fixup_offset
);
2016 rofixup
->reloc_count
++;
2018 if (entry
&& entry
->symndx
)
2020 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2022 BFD_ASSERT (entry
->fixups
> 0);
2026 return fixup_offset
;
2029 /* Find the segment number in which OSEC, and output section, is
2033 _bfinfdpic_osec_to_segment (bfd
*output_bfd
, asection
*osec
)
2035 Elf_Internal_Phdr
*p
= _bfd_elf_find_segment_containing_section (output_bfd
, osec
);
2037 return (p
!= NULL
) ? p
- elf_tdata (output_bfd
)->phdr
: -1;
2040 inline static bfd_boolean
2041 _bfinfdpic_osec_readonly_p (bfd
*output_bfd
, asection
*osec
)
2043 unsigned seg
= _bfinfdpic_osec_to_segment (output_bfd
, osec
);
2045 return ! (elf_tdata (output_bfd
)->phdr
[seg
].p_flags
& PF_W
);
2048 /* Generate relocations for GOT entries, function descriptors, and
2049 code for PLT and lazy PLT entries. */
2051 inline static bfd_boolean
2052 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info
*entry
,
2054 struct bfd_link_info
*info
,
2056 Elf_Internal_Sym
*sym
,
2059 bfd_vma fd_lazy_rel_offset
= (bfd_vma
) -1;
2066 if (entry
->got_entry
|| entry
->fdgot_entry
|| entry
->fd_entry
)
2068 /* If the symbol is dynamic, consider it for dynamic
2069 relocations, otherwise decay to section + offset. */
2070 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1)
2071 dynindx
= entry
->d
.h
->dynindx
;
2075 && sec
->output_section
2076 && ! bfd_is_abs_section (sec
->output_section
)
2077 && ! bfd_is_und_section (sec
->output_section
))
2078 dynindx
= elf_section_data (sec
->output_section
)->dynindx
;
2084 /* Generate relocation for GOT entry pointing to the symbol. */
2085 if (entry
->got_entry
)
2088 bfd_vma ad
= addend
;
2090 /* If the symbol is dynamic but binds locally, use
2092 if (sec
&& (entry
->symndx
!= -1
2093 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2095 if (entry
->symndx
== -1)
2096 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2098 ad
+= sym
->st_value
;
2099 ad
+= sec
->output_offset
;
2100 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2101 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2106 /* If we're linking an executable at a fixed address, we can
2107 omit the dynamic relocation as long as the symbol is local to
2109 if (bfd_link_pde (info
)
2110 && (entry
->symndx
!= -1
2111 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2114 ad
+= sec
->output_section
->vma
;
2115 if (entry
->symndx
!= -1
2116 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2117 _bfinfdpic_add_rofixup (output_bfd
,
2118 bfinfdpic_gotfixup_section (info
),
2119 bfinfdpic_got_section (info
)->output_section
2121 + bfinfdpic_got_section (info
)->output_offset
2122 + bfinfdpic_got_initial_offset (info
)
2123 + entry
->got_entry
, entry
);
2126 _bfinfdpic_add_dyn_reloc (output_bfd
, bfinfdpic_gotrel_section (info
),
2127 _bfd_elf_section_offset
2129 bfinfdpic_got_section (info
),
2130 bfinfdpic_got_initial_offset (info
)
2132 + bfinfdpic_got_section (info
)
2133 ->output_section
->vma
2134 + bfinfdpic_got_section (info
)->output_offset
,
2135 R_BFIN_BYTE4_DATA
, idx
, ad
, entry
);
2137 bfd_put_32 (output_bfd
, ad
,
2138 bfinfdpic_got_section (info
)->contents
2139 + bfinfdpic_got_initial_offset (info
)
2140 + entry
->got_entry
);
2143 /* Generate relocation for GOT entry pointing to a canonical
2144 function descriptor. */
2145 if (entry
->fdgot_entry
)
2150 if (! (entry
->symndx
== -1
2151 && entry
->d
.h
->root
.type
== bfd_link_hash_undefweak
2152 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2154 /* If the symbol is dynamic and there may be dynamic symbol
2155 resolution because we are, or are linked with, a shared
2156 library, emit a FUNCDESC relocation such that the dynamic
2157 linker will allocate the function descriptor. If the
2158 symbol needs a non-local function descriptor but binds
2159 locally (e.g., its visibility is protected, emit a
2160 dynamic relocation decayed to section+offset. */
2161 if (entry
->symndx
== -1
2162 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)
2163 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)
2164 && !bfd_link_pde (info
))
2166 reloc
= R_BFIN_FUNCDESC
;
2167 idx
= elf_section_data (entry
->d
.h
->root
.u
.def
.section
2168 ->output_section
)->dynindx
;
2169 ad
= entry
->d
.h
->root
.u
.def
.section
->output_offset
2170 + entry
->d
.h
->root
.u
.def
.value
;
2172 else if (entry
->symndx
== -1
2173 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
))
2175 reloc
= R_BFIN_FUNCDESC
;
2183 /* Otherwise, we know we have a private function descriptor,
2184 so reference it directly. */
2185 if (elf_hash_table (info
)->dynamic_sections_created
)
2186 BFD_ASSERT (entry
->privfd
);
2187 reloc
= R_BFIN_BYTE4_DATA
;
2188 idx
= elf_section_data (bfinfdpic_got_section (info
)
2189 ->output_section
)->dynindx
;
2190 ad
= bfinfdpic_got_section (info
)->output_offset
2191 + bfinfdpic_got_initial_offset (info
) + entry
->fd_entry
;
2194 /* If there is room for dynamic symbol resolution, emit the
2195 dynamic relocation. However, if we're linking an
2196 executable at a fixed location, we won't have emitted a
2197 dynamic symbol entry for the got section, so idx will be
2198 zero, which means we can and should compute the address
2199 of the private descriptor ourselves. */
2200 if (bfd_link_pde (info
)
2201 && (entry
->symndx
!= -1
2202 || BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)))
2204 ad
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2205 _bfinfdpic_add_rofixup (output_bfd
,
2206 bfinfdpic_gotfixup_section (info
),
2207 bfinfdpic_got_section (info
)
2208 ->output_section
->vma
2209 + bfinfdpic_got_section (info
)
2211 + bfinfdpic_got_initial_offset (info
)
2212 + entry
->fdgot_entry
, entry
);
2215 _bfinfdpic_add_dyn_reloc (output_bfd
,
2216 bfinfdpic_gotrel_section (info
),
2217 _bfd_elf_section_offset
2219 bfinfdpic_got_section (info
),
2220 bfinfdpic_got_initial_offset (info
)
2221 + entry
->fdgot_entry
)
2222 + bfinfdpic_got_section (info
)
2223 ->output_section
->vma
2224 + bfinfdpic_got_section (info
)
2226 reloc
, idx
, ad
, entry
);
2229 bfd_put_32 (output_bfd
, ad
,
2230 bfinfdpic_got_section (info
)->contents
2231 + bfinfdpic_got_initial_offset (info
)
2232 + entry
->fdgot_entry
);
2235 /* Generate relocation to fill in a private function descriptor in
2237 if (entry
->fd_entry
)
2240 bfd_vma ad
= addend
;
2242 long lowword
, highword
;
2244 /* If the symbol is dynamic but binds locally, use
2246 if (sec
&& (entry
->symndx
!= -1
2247 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2249 if (entry
->symndx
== -1)
2250 ad
+= entry
->d
.h
->root
.u
.def
.value
;
2252 ad
+= sym
->st_value
;
2253 ad
+= sec
->output_offset
;
2254 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
2255 idx
= elf_section_data (sec
->output_section
)->dynindx
;
2260 /* If we're linking an executable at a fixed address, we can
2261 omit the dynamic relocation as long as the symbol is local to
2263 if (bfd_link_pde (info
)
2264 && (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
2267 ad
+= sec
->output_section
->vma
;
2269 if (entry
->symndx
!= -1
2270 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
2272 _bfinfdpic_add_rofixup (output_bfd
,
2273 bfinfdpic_gotfixup_section (info
),
2274 bfinfdpic_got_section (info
)
2275 ->output_section
->vma
2276 + bfinfdpic_got_section (info
)
2278 + bfinfdpic_got_initial_offset (info
)
2279 + entry
->fd_entry
, entry
);
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
+ 4, entry
);
2293 = _bfinfdpic_add_dyn_reloc (output_bfd
,
2295 ? bfinfdpic_pltrel_section (info
)
2296 : bfinfdpic_gotrel_section (info
),
2297 _bfd_elf_section_offset
2299 bfinfdpic_got_section (info
),
2300 bfinfdpic_got_initial_offset (info
)
2302 + bfinfdpic_got_section (info
)
2303 ->output_section
->vma
2304 + bfinfdpic_got_section (info
)
2306 R_BFIN_FUNCDESC_VALUE
, idx
, ad
, entry
);
2309 /* If we've omitted the dynamic relocation, just emit the fixed
2310 addresses of the symbol and of the local GOT base offset. */
2311 if (bfd_link_pde (info
)
2313 && sec
->output_section
)
2316 highword
= bfinfdpic_got_section (info
)->output_section
->vma
2317 + bfinfdpic_got_section (info
)->output_offset
2318 + bfinfdpic_got_initial_offset (info
);
2320 else if (entry
->lazyplt
)
2325 fd_lazy_rel_offset
= ofst
;
2327 /* A function descriptor used for lazy or local resolving is
2328 initialized such that its high word contains the output
2329 section index in which the PLT entries are located, and
2330 the low word contains the address of the lazy PLT entry
2331 entry point, that must be within the memory region
2332 assigned to that section. */
2333 lowword
= entry
->lzplt_entry
+ 4
2334 + bfinfdpic_plt_section (info
)->output_offset
2335 + bfinfdpic_plt_section (info
)->output_section
->vma
;
2336 highword
= _bfinfdpic_osec_to_segment
2337 (output_bfd
, bfinfdpic_plt_section (info
)->output_section
);
2341 /* A function descriptor for a local function gets the index
2342 of the section. For a non-local function, it's
2346 || (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1
2347 && entry
->d
.h
->dynindx
== idx
))
2350 highword
= _bfinfdpic_osec_to_segment
2351 (output_bfd
, sec
->output_section
);
2354 bfd_put_32 (output_bfd
, lowword
,
2355 bfinfdpic_got_section (info
)->contents
2356 + bfinfdpic_got_initial_offset (info
)
2358 bfd_put_32 (output_bfd
, highword
,
2359 bfinfdpic_got_section (info
)->contents
2360 + bfinfdpic_got_initial_offset (info
)
2361 + entry
->fd_entry
+ 4);
2364 /* Generate code for the PLT entry. */
2365 if (entry
->plt_entry
!= (bfd_vma
) -1)
2367 bfd_byte
*plt_code
= bfinfdpic_plt_section (info
)->contents
2370 BFD_ASSERT (entry
->fd_entry
);
2372 /* Figure out what kind of PLT entry we need, depending on the
2373 location of the function descriptor within the GOT. */
2374 if (entry
->fd_entry
>= -(1 << (18 - 1))
2375 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
2377 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2378 bfd_put_32 (output_bfd
,
2379 0xe519 | ((entry
->fd_entry
<< 14) & 0xFFFF0000),
2381 bfd_put_32 (output_bfd
,
2382 0xe51b | (((entry
->fd_entry
+ 4) << 14) & 0xFFFF0000),
2388 /* P1.L = fd_entry; P1.H = fd_entry;
2392 bfd_put_32 (output_bfd
,
2393 0xe109 | (entry
->fd_entry
<< 16),
2395 bfd_put_32 (output_bfd
,
2396 0xe149 | (entry
->fd_entry
& 0xFFFF0000),
2398 bfd_put_16 (output_bfd
, 0x5ad9, plt_code
+ 8);
2399 bfd_put_16 (output_bfd
, 0x9159, plt_code
+ 10);
2400 bfd_put_16 (output_bfd
, 0xac5b, plt_code
+ 12);
2404 bfd_put_16 (output_bfd
, 0x0051, plt_code
);
2407 /* Generate code for the lazy PLT entry. */
2408 if (entry
->lzplt_entry
!= (bfd_vma
) -1)
2410 bfd_byte
*lzplt_code
= bfinfdpic_plt_section (info
)->contents
2411 + entry
->lzplt_entry
;
2412 bfd_vma resolverStub_addr
;
2414 bfd_put_32 (output_bfd
, fd_lazy_rel_offset
, lzplt_code
);
2417 resolverStub_addr
= entry
->lzplt_entry
/ BFINFDPIC_LZPLT_BLOCK_SIZE
2418 * BFINFDPIC_LZPLT_BLOCK_SIZE
+ BFINFDPIC_LZPLT_RESOLV_LOC
;
2419 if (resolverStub_addr
>= bfinfdpic_plt_initial_offset (info
))
2420 resolverStub_addr
= bfinfdpic_plt_initial_offset (info
) - LZPLT_NORMAL_SIZE
- LZPLT_RESOLVER_EXTRA
;
2422 if (entry
->lzplt_entry
== resolverStub_addr
)
2424 /* This is a lazy PLT entry that includes a resolver call.
2428 bfd_put_32 (output_bfd
,
2431 bfd_put_16 (output_bfd
, 0x0052, lzplt_code
+ 4);
2435 /* JUMP.S resolverStub */
2436 bfd_put_16 (output_bfd
,
2438 | (((resolverStub_addr
- entry
->lzplt_entry
)
2439 / 2) & (((bfd_vma
)1 << 12) - 1)),
2447 /* Relocate an Blackfin ELF section.
2449 The RELOCATE_SECTION function is called by the new ELF backend linker
2450 to handle the relocations for a section.
2452 The relocs are always passed as Rela structures; if the section
2453 actually uses Rel structures, the r_addend field will always be
2456 This function is responsible for adjusting the section contents as
2457 necessary, and (if using Rela relocs and generating a relocatable
2458 output file) adjusting the reloc addend as necessary.
2460 This function does not have to worry about setting the reloc
2461 address or the reloc symbol index.
2463 LOCAL_SYMS is a pointer to the swapped in local symbols.
2465 LOCAL_SECTIONS is an array giving the section in the input file
2466 corresponding to the st_shndx field of each local symbol.
2468 The global hash table entry for the global symbols can be found
2469 via elf_sym_hashes (input_bfd).
2471 When generating relocatable output, this function must handle
2472 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2473 going to be the section symbol corresponding to the output
2474 section, which means that the addend must be adjusted
2478 bfinfdpic_relocate_section (bfd
* output_bfd
,
2479 struct bfd_link_info
*info
,
2481 asection
* input_section
,
2482 bfd_byte
* contents
,
2483 Elf_Internal_Rela
* relocs
,
2484 Elf_Internal_Sym
* local_syms
,
2485 asection
** local_sections
)
2487 Elf_Internal_Shdr
*symtab_hdr
;
2488 struct elf_link_hash_entry
**sym_hashes
;
2489 Elf_Internal_Rela
*rel
;
2490 Elf_Internal_Rela
*relend
;
2491 unsigned isec_segment
, got_segment
, plt_segment
,
2493 int silence_segment_error
= !bfd_link_pic (info
);
2495 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
2496 sym_hashes
= elf_sym_hashes (input_bfd
);
2497 relend
= relocs
+ input_section
->reloc_count
;
2499 isec_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2500 input_section
->output_section
);
2501 if (IS_FDPIC (output_bfd
) && bfinfdpic_got_section (info
))
2502 got_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2503 bfinfdpic_got_section (info
)
2507 if (IS_FDPIC (output_bfd
) && elf_hash_table (info
)->dynamic_sections_created
)
2508 plt_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2509 bfinfdpic_plt_section (info
)
2514 for (rel
= relocs
; rel
< relend
; rel
++)
2516 reloc_howto_type
*howto
;
2517 unsigned long r_symndx
;
2518 Elf_Internal_Sym
*sym
;
2520 struct elf_link_hash_entry
*h
;
2522 bfd_reloc_status_type r
;
2523 const char * name
= NULL
;
2526 struct bfinfdpic_relocs_info
*picrel
;
2527 bfd_vma orig_addend
= rel
->r_addend
;
2529 r_type
= ELF32_R_TYPE (rel
->r_info
);
2531 if (r_type
== R_BFIN_GNU_VTINHERIT
2532 || r_type
== R_BFIN_GNU_VTENTRY
)
2535 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2536 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2539 bfd_set_error (bfd_error_bad_value
);
2547 if (r_symndx
< symtab_hdr
->sh_info
)
2549 sym
= local_syms
+ r_symndx
;
2550 osec
= sec
= local_sections
[r_symndx
];
2551 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2553 name
= bfd_elf_string_from_elf_section
2554 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
2555 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
2559 bfd_boolean warned
, ignored
;
2560 bfd_boolean unresolved_reloc
;
2562 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2563 r_symndx
, symtab_hdr
, sym_hashes
,
2565 unresolved_reloc
, warned
, ignored
);
2569 if (sec
!= NULL
&& discarded_section (sec
))
2570 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2571 rel
, 1, relend
, howto
, 0, contents
);
2573 if (bfd_link_relocatable (info
))
2577 && (h
->root
.type
== bfd_link_hash_defined
2578 || h
->root
.type
== bfd_link_hash_defweak
)
2579 && !BFINFDPIC_SYM_LOCAL (info
, h
))
2587 case R_BFIN_PCREL24
:
2588 case R_BFIN_PCREL24_JUMP_L
:
2589 case R_BFIN_BYTE4_DATA
:
2590 if (! IS_FDPIC (output_bfd
))
2594 case R_BFIN_GOT17M4
:
2597 case R_BFIN_FUNCDESC_GOT17M4
:
2598 case R_BFIN_FUNCDESC_GOTHI
:
2599 case R_BFIN_FUNCDESC_GOTLO
:
2600 case R_BFIN_GOTOFF17M4
:
2601 case R_BFIN_GOTOFFHI
:
2602 case R_BFIN_GOTOFFLO
:
2603 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2604 case R_BFIN_FUNCDESC_GOTOFFHI
:
2605 case R_BFIN_FUNCDESC_GOTOFFLO
:
2606 case R_BFIN_FUNCDESC
:
2607 case R_BFIN_FUNCDESC_VALUE
:
2609 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2610 (info
), input_bfd
, h
,
2611 orig_addend
, INSERT
);
2613 /* In order to find the entry we created before, we must
2614 use the original addend, not the one that may have been
2615 modified by _bfd_elf_rela_local_sym(). */
2616 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2617 (info
), input_bfd
, r_symndx
,
2618 orig_addend
, INSERT
);
2622 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel
, output_bfd
, info
,
2627 /* xgettext:c-format */
2628 (_("%B: relocation at `%A+%#Lx' references symbol `%s' with nonzero addend"),
2629 input_bfd
, input_section
, rel
->r_offset
, name
);
2639 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2640 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2641 rel
->r_offset
) != (bfd_vma
) -1)
2643 info
->callbacks
->warning
2644 (info
, _("relocation references symbol not defined in the module"),
2645 name
, input_bfd
, input_section
, rel
->r_offset
);
2653 case R_BFIN_PCREL24
:
2654 case R_BFIN_PCREL24_JUMP_L
:
2655 check_segment
[0] = isec_segment
;
2656 if (! IS_FDPIC (output_bfd
))
2657 check_segment
[1] = isec_segment
;
2658 else if (picrel
->plt
)
2660 relocation
= bfinfdpic_plt_section (info
)->output_section
->vma
2661 + bfinfdpic_plt_section (info
)->output_offset
2662 + picrel
->plt_entry
;
2663 check_segment
[1] = plt_segment
;
2665 /* We don't want to warn on calls to undefined weak symbols,
2666 as calls to them must be protected by non-NULL tests
2667 anyway, and unprotected calls would invoke undefined
2669 else if (picrel
->symndx
== -1
2670 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefweak
)
2671 check_segment
[1] = check_segment
[0];
2673 check_segment
[1] = sec
2674 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2678 case R_BFIN_GOT17M4
:
2681 relocation
= picrel
->got_entry
;
2682 check_segment
[0] = check_segment
[1] = got_segment
;
2685 case R_BFIN_FUNCDESC_GOT17M4
:
2686 case R_BFIN_FUNCDESC_GOTHI
:
2687 case R_BFIN_FUNCDESC_GOTLO
:
2688 relocation
= picrel
->fdgot_entry
;
2689 check_segment
[0] = check_segment
[1] = got_segment
;
2692 case R_BFIN_GOTOFFHI
:
2693 case R_BFIN_GOTOFF17M4
:
2694 case R_BFIN_GOTOFFLO
:
2695 relocation
-= bfinfdpic_got_section (info
)->output_section
->vma
2696 + bfinfdpic_got_section (info
)->output_offset
2697 + bfinfdpic_got_initial_offset (info
);
2698 check_segment
[0] = got_segment
;
2699 check_segment
[1] = sec
2700 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2704 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2705 case R_BFIN_FUNCDESC_GOTOFFHI
:
2706 case R_BFIN_FUNCDESC_GOTOFFLO
:
2707 relocation
= picrel
->fd_entry
;
2708 check_segment
[0] = check_segment
[1] = got_segment
;
2711 case R_BFIN_FUNCDESC
:
2714 bfd_vma addend
= rel
->r_addend
;
2716 if (! (h
&& h
->root
.type
== bfd_link_hash_undefweak
2717 && BFINFDPIC_SYM_LOCAL (info
, h
)))
2719 /* If the symbol is dynamic and there may be dynamic
2720 symbol resolution because we are or are linked with a
2721 shared library, emit a FUNCDESC relocation such that
2722 the dynamic linker will allocate the function
2723 descriptor. If the symbol needs a non-local function
2724 descriptor but binds locally (e.g., its visibility is
2725 protected, emit a dynamic relocation decayed to
2727 if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
)
2728 && BFINFDPIC_SYM_LOCAL (info
, h
)
2729 && !bfd_link_pde (info
))
2731 dynindx
= elf_section_data (h
->root
.u
.def
.section
2732 ->output_section
)->dynindx
;
2733 addend
+= h
->root
.u
.def
.section
->output_offset
2734 + h
->root
.u
.def
.value
;
2736 else if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
))
2740 info
->callbacks
->warning
2741 (info
, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2742 name
, input_bfd
, input_section
, rel
->r_offset
);
2745 dynindx
= h
->dynindx
;
2749 /* Otherwise, we know we have a private function
2750 descriptor, so reference it directly. */
2751 BFD_ASSERT (picrel
->privfd
);
2752 r_type
= R_BFIN_BYTE4_DATA
;
2753 dynindx
= elf_section_data (bfinfdpic_got_section (info
)
2754 ->output_section
)->dynindx
;
2755 addend
= bfinfdpic_got_section (info
)->output_offset
2756 + bfinfdpic_got_initial_offset (info
)
2760 /* If there is room for dynamic symbol resolution, emit
2761 the dynamic relocation. However, if we're linking an
2762 executable at a fixed location, we won't have emitted a
2763 dynamic symbol entry for the got section, so idx will
2764 be zero, which means we can and should compute the
2765 address of the private descriptor ourselves. */
2766 if (bfd_link_pde (info
)
2767 && (!h
|| BFINFDPIC_FUNCDESC_LOCAL (info
, h
)))
2771 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2772 if ((bfd_get_section_flags (output_bfd
,
2773 input_section
->output_section
)
2774 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2776 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2780 info
->callbacks
->warning
2782 _("cannot emit fixups in read-only section"),
2783 name
, input_bfd
, input_section
, rel
->r_offset
);
2787 offset
= _bfd_elf_section_offset
2789 input_section
, rel
->r_offset
);
2791 if (offset
!= (bfd_vma
)-1)
2792 _bfinfdpic_add_rofixup (output_bfd
,
2793 bfinfdpic_gotfixup_section
2795 offset
+ input_section
2796 ->output_section
->vma
2797 + input_section
->output_offset
,
2801 else if ((bfd_get_section_flags (output_bfd
,
2802 input_section
->output_section
)
2803 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2807 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2811 info
->callbacks
->warning
2813 _("cannot emit dynamic relocations in read-only section"),
2814 name
, input_bfd
, input_section
, rel
->r_offset
);
2817 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2818 input_section
, rel
->r_offset
);
2820 if (offset
!= (bfd_vma
)-1)
2821 _bfinfdpic_add_dyn_reloc (output_bfd
,
2822 bfinfdpic_gotrel_section (info
),
2823 offset
+ input_section
2824 ->output_section
->vma
2825 + input_section
->output_offset
,
2827 dynindx
, addend
, picrel
);
2830 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2833 /* We want the addend in-place because dynamic
2834 relocations are REL. Setting relocation to it should
2835 arrange for it to be installed. */
2836 relocation
= addend
- rel
->r_addend
;
2838 check_segment
[0] = check_segment
[1] = got_segment
;
2841 case R_BFIN_BYTE4_DATA
:
2842 if (! IS_FDPIC (output_bfd
))
2844 check_segment
[0] = check_segment
[1] = -1;
2848 case R_BFIN_FUNCDESC_VALUE
:
2851 bfd_vma addend
= rel
->r_addend
;
2853 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2854 input_section
, rel
->r_offset
);
2856 /* If the symbol is dynamic but binds locally, use
2858 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2860 if (addend
&& r_type
== R_BFIN_FUNCDESC_VALUE
)
2862 info
->callbacks
->warning
2863 (info
, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2864 name
, input_bfd
, input_section
, rel
->r_offset
);
2867 dynindx
= h
->dynindx
;
2872 addend
+= h
->root
.u
.def
.value
;
2874 addend
+= sym
->st_value
;
2876 addend
+= osec
->output_offset
;
2877 if (osec
&& osec
->output_section
2878 && ! bfd_is_abs_section (osec
->output_section
)
2879 && ! bfd_is_und_section (osec
->output_section
))
2880 dynindx
= elf_section_data (osec
->output_section
)->dynindx
;
2885 /* If we're linking an executable at a fixed address, we
2886 can omit the dynamic relocation as long as the symbol
2887 is defined in the current link unit (which is implied
2888 by its output section not being NULL). */
2889 if (bfd_link_pde (info
)
2890 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2893 addend
+= osec
->output_section
->vma
;
2894 if (IS_FDPIC (input_bfd
)
2895 && (bfd_get_section_flags (output_bfd
,
2896 input_section
->output_section
)
2897 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2899 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2903 info
->callbacks
->warning
2905 _("cannot emit fixups in read-only section"),
2906 name
, input_bfd
, input_section
, rel
->r_offset
);
2909 if (!h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2911 if (offset
!= (bfd_vma
)-1)
2913 _bfinfdpic_add_rofixup (output_bfd
,
2914 bfinfdpic_gotfixup_section
2916 offset
+ input_section
2917 ->output_section
->vma
2918 + input_section
->output_offset
,
2921 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2922 _bfinfdpic_add_rofixup
2924 bfinfdpic_gotfixup_section (info
),
2925 offset
+ input_section
->output_section
->vma
2926 + input_section
->output_offset
+ 4, picrel
);
2933 if ((bfd_get_section_flags (output_bfd
,
2934 input_section
->output_section
)
2935 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2937 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2941 info
->callbacks
->warning
2943 _("cannot emit dynamic relocations in read-only section"),
2944 name
, input_bfd
, input_section
, rel
->r_offset
);
2948 if (offset
!= (bfd_vma
)-1)
2949 _bfinfdpic_add_dyn_reloc (output_bfd
,
2950 bfinfdpic_gotrel_section (info
),
2952 + input_section
->output_section
->vma
2953 + input_section
->output_offset
,
2954 r_type
, dynindx
, addend
, picrel
);
2957 addend
+= osec
->output_section
->vma
;
2958 /* We want the addend in-place because dynamic
2959 relocations are REL. Setting relocation to it
2960 should arrange for it to be installed. */
2961 relocation
= addend
- rel
->r_addend
;
2964 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2966 /* If we've omitted the dynamic relocation, just emit
2967 the fixed addresses of the symbol and of the local
2969 if (bfd_link_pde (info
)
2970 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2971 bfd_put_32 (output_bfd
,
2972 bfinfdpic_got_section (info
)->output_section
->vma
2973 + bfinfdpic_got_section (info
)->output_offset
2974 + bfinfdpic_got_initial_offset (info
),
2975 contents
+ rel
->r_offset
+ 4);
2977 /* A function descriptor used for lazy or local
2978 resolving is initialized such that its high word
2979 contains the output section index in which the
2980 PLT entries are located, and the low word
2981 contains the offset of the lazy PLT entry entry
2982 point into that section. */
2983 bfd_put_32 (output_bfd
,
2984 h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2986 : _bfinfdpic_osec_to_segment (output_bfd
,
2989 contents
+ rel
->r_offset
+ 4);
2992 check_segment
[0] = check_segment
[1] = got_segment
;
2996 check_segment
[0] = isec_segment
;
2997 check_segment
[1] = sec
2998 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
3003 if (check_segment
[0] != check_segment
[1] && IS_FDPIC (output_bfd
))
3005 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3006 in the ld testsuite. */
3007 /* This helps catch problems in GCC while we can't do more
3008 than static linking. The idea is to test whether the
3009 input file basename is crt0.o only once. */
3010 if (silence_segment_error
== 1)
3011 silence_segment_error
=
3012 (strlen (input_bfd
->filename
) == 6
3013 && filename_cmp (input_bfd
->filename
, "crt0.o") == 0)
3014 || (strlen (input_bfd
->filename
) > 6
3015 && filename_cmp (input_bfd
->filename
3016 + strlen (input_bfd
->filename
) - 7,
3020 if (!silence_segment_error
3021 /* We don't want duplicate errors for undefined
3023 && !(picrel
&& picrel
->symndx
== -1
3024 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefined
))
3025 info
->callbacks
->warning
3028 ? _("relocations between different segments are not supported")
3029 : _("warning: relocation references a different segment"),
3030 name
, input_bfd
, input_section
, rel
->r_offset
);
3031 if (!silence_segment_error
&& bfd_link_pic (info
))
3033 elf_elfheader (output_bfd
)->e_flags
|= EF_BFIN_PIC
;
3038 case R_BFIN_GOTOFFHI
:
3039 /* We need the addend to be applied before we shift the
3041 relocation
+= rel
->r_addend
;
3044 case R_BFIN_FUNCDESC_GOTHI
:
3045 case R_BFIN_FUNCDESC_GOTOFFHI
:
3050 case R_BFIN_FUNCDESC_GOTLO
:
3051 case R_BFIN_GOTOFFLO
:
3052 case R_BFIN_FUNCDESC_GOTOFFLO
:
3053 relocation
&= 0xffff;
3062 case R_BFIN_PCREL24
:
3063 case R_BFIN_PCREL24_JUMP_L
:
3064 if (! IS_FDPIC (output_bfd
) || ! picrel
->plt
)
3068 /* When referencing a GOT entry, a function descriptor or a
3069 PLT, we don't want the addend to apply to the reference,
3070 but rather to the referenced symbol. The actual entry
3071 will have already been created taking the addend into
3072 account, so cancel it out here. */
3073 case R_BFIN_GOT17M4
:
3076 case R_BFIN_FUNCDESC_GOT17M4
:
3077 case R_BFIN_FUNCDESC_GOTHI
:
3078 case R_BFIN_FUNCDESC_GOTLO
:
3079 case R_BFIN_FUNCDESC_GOTOFF17M4
:
3080 case R_BFIN_FUNCDESC_GOTOFFHI
:
3081 case R_BFIN_FUNCDESC_GOTOFFLO
:
3082 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3083 here, since we do want to apply the addend to the others.
3084 Note that we've applied the addend to GOTOFFHI before we
3085 shifted it right. */
3086 case R_BFIN_GOTOFFHI
:
3087 relocation
-= rel
->r_addend
;
3094 r
= bfin_final_link_relocate (rel
, howto
, input_bfd
, input_section
,
3095 contents
, rel
->r_offset
,
3096 relocation
, rel
->r_addend
);
3098 if (r
!= bfd_reloc_ok
)
3100 const char * msg
= (const char *) NULL
;
3104 case bfd_reloc_overflow
:
3105 (*info
->callbacks
->reloc_overflow
)
3106 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3107 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3110 case bfd_reloc_undefined
:
3111 (*info
->callbacks
->undefined_symbol
)
3112 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
3115 case bfd_reloc_outofrange
:
3116 msg
= _("internal error: out of range error");
3119 case bfd_reloc_notsupported
:
3120 msg
= _("internal error: unsupported relocation error");
3123 case bfd_reloc_dangerous
:
3124 msg
= _("internal error: dangerous relocation");
3128 msg
= _("internal error: unknown error");
3133 (*info
->callbacks
->warning
) (info
, msg
, name
, input_bfd
,
3134 input_section
, rel
->r_offset
);
3141 /* We need dynamic symbols for every section, since segments can
3142 relocate independently. */
3144 _bfinfdpic_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3145 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3148 switch (elf_section_data (p
)->this_hdr
.sh_type
)
3152 /* If sh_type is yet undecided, assume it could be
3153 SHT_PROGBITS/SHT_NOBITS. */
3157 /* There shouldn't be section relative relocations
3158 against any other section. */
3164 /* Create a .got section, as well as its additional info field. This
3165 is almost entirely copied from
3166 elflink.c:_bfd_elf_create_got_section(). */
3169 _bfin_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
3171 flagword flags
, pltflags
;
3173 struct elf_link_hash_entry
*h
;
3174 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3177 /* This function may be called more than once. */
3178 s
= elf_hash_table (info
)->sgot
;
3182 /* Machine specific: although pointers are 32-bits wide, we want the
3183 GOT to be aligned to a 64-bit boundary, such that function
3184 descriptors in it can be accessed with 64-bit loads and
3188 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3189 | SEC_LINKER_CREATED
);
3192 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
3193 elf_hash_table (info
)->sgot
= s
;
3195 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3198 if (bed
->want_got_sym
)
3200 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3201 (or .got.plt) section. We don't do this in the linker script
3202 because we don't want to define the symbol if we are not creating
3203 a global offset table. */
3204 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "__GLOBAL_OFFSET_TABLE_");
3205 elf_hash_table (info
)->hgot
= h
;
3209 /* Machine-specific: we want the symbol for executables as
3211 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3215 /* The first bit of the global offset table is the header. */
3216 s
->size
+= bed
->got_header_size
;
3218 /* This is the machine-specific part. Create and initialize section
3219 data for the got. */
3220 if (IS_FDPIC (abfd
))
3222 bfinfdpic_relocs_info (info
) = htab_try_create (1,
3223 bfinfdpic_relocs_info_hash
,
3224 bfinfdpic_relocs_info_eq
,
3226 if (! bfinfdpic_relocs_info (info
))
3229 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.got",
3230 (flags
| SEC_READONLY
));
3232 || ! bfd_set_section_alignment (abfd
, s
, 2))
3235 bfinfdpic_gotrel_section (info
) = s
;
3237 /* Machine-specific. */
3238 s
= bfd_make_section_anyway_with_flags (abfd
, ".rofixup",
3239 (flags
| SEC_READONLY
));
3241 || ! bfd_set_section_alignment (abfd
, s
, 2))
3244 bfinfdpic_gotfixup_section (info
) = s
;
3247 pltflags
|= SEC_CODE
;
3248 if (bed
->plt_not_loaded
)
3249 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
3250 if (bed
->plt_readonly
)
3251 pltflags
|= SEC_READONLY
;
3253 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
3255 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
3257 /* Blackfin-specific: remember it. */
3258 bfinfdpic_plt_section (info
) = s
;
3260 if (bed
->want_plt_sym
)
3262 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3264 struct bfd_link_hash_entry
*bh
= NULL
;
3266 if (! (_bfd_generic_link_add_one_symbol
3267 (info
, abfd
, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
, 0, NULL
,
3268 FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
3270 h
= (struct elf_link_hash_entry
*) bh
;
3272 h
->type
= STT_OBJECT
;
3274 if (! bfd_link_executable (info
)
3275 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3279 /* Blackfin-specific: we want rel relocations for the plt. */
3280 s
= bfd_make_section_anyway_with_flags (abfd
, ".rel.plt",
3281 flags
| SEC_READONLY
);
3283 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3285 /* Blackfin-specific: remember it. */
3286 bfinfdpic_pltrel_section (info
) = s
;
3291 /* Make sure the got and plt sections exist, and that our pointers in
3292 the link hash table point to them. */
3295 elf32_bfinfdpic_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3297 /* This is mostly copied from
3298 elflink.c:_bfd_elf_create_dynamic_sections(). */
3301 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3303 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3304 | SEC_LINKER_CREATED
);
3306 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3307 .rel[a].bss sections. */
3309 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3310 if (! _bfin_create_got_section (abfd
, info
))
3313 /* Blackfin-specific: make sure we created everything we wanted. */
3314 BFD_ASSERT (bfinfdpic_got_section (info
) && bfinfdpic_gotrel_section (info
)
3315 /* && bfinfdpic_gotfixup_section (info) */
3316 && bfinfdpic_plt_section (info
)
3317 && bfinfdpic_pltrel_section (info
));
3319 if (bed
->want_dynbss
)
3321 /* The .dynbss section is a place to put symbols which are defined
3322 by dynamic objects, are referenced by regular objects, and are
3323 not functions. We must allocate space for them in the process
3324 image and use a R_*_COPY reloc to tell the dynamic linker to
3325 initialize them at run time. The linker script puts the .dynbss
3326 section into the .bss section of the final image. */
3327 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
3328 SEC_ALLOC
| SEC_LINKER_CREATED
);
3332 /* The .rel[a].bss section holds copy relocs. This section is not
3333 normally needed. We need to create it here, though, so that the
3334 linker will map it to an output section. We can't just create it
3335 only if we need it, because we will not know whether we need it
3336 until we have seen all the input files, and the first time the
3337 main linker code calls BFD after examining all the input files
3338 (size_dynamic_sections) the input sections have already been
3339 mapped to the output sections. If the section turns out not to
3340 be needed, we can discard it later. We will never need this
3341 section when generating a shared object, since they do not use
3343 if (! bfd_link_pic (info
))
3345 s
= bfd_make_section_anyway_with_flags (abfd
,
3347 flags
| SEC_READONLY
);
3349 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3357 /* Compute the total GOT size required by each symbol in each range.
3358 Symbols may require up to 4 words in the GOT: an entry pointing to
3359 the symbol, an entry pointing to its function descriptor, and a
3360 private function descriptors taking two words. */
3363 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info
*entry
,
3364 struct _bfinfdpic_dynamic_got_info
*dinfo
)
3366 /* Allocate space for a GOT entry pointing to the symbol. */
3368 dinfo
->got17m4
+= 4;
3369 else if (entry
->gothilo
)
3370 dinfo
->gothilo
+= 4;
3375 /* Allocate space for a GOT entry pointing to the function
3377 if (entry
->fdgot17m4
)
3378 dinfo
->got17m4
+= 4;
3379 else if (entry
->fdgothilo
)
3380 dinfo
->gothilo
+= 4;
3385 /* Decide whether we need a PLT entry, a function descriptor in the
3386 GOT, and a lazy PLT entry for this symbol. */
3387 entry
->plt
= entry
->call
3388 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3389 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3390 entry
->privfd
= entry
->plt
3391 || entry
->fdgoff17m4
|| entry
->fdgoffhilo
3392 || ((entry
->fd
|| entry
->fdgot17m4
|| entry
->fdgothilo
)
3393 && (entry
->symndx
!= -1
3394 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
)));
3395 entry
->lazyplt
= entry
->privfd
3396 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3397 && ! (dinfo
->info
->flags
& DF_BIND_NOW
)
3398 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3400 /* Allocate space for a function descriptor. */
3401 if (entry
->fdgoff17m4
)
3403 else if (entry
->privfd
&& entry
->plt
)
3405 else if (entry
->privfd
)
3412 dinfo
->lzplt
+= LZPLT_NORMAL_SIZE
;
3415 /* Compute the number of dynamic relocations and fixups that a symbol
3416 requires, and add (or subtract) from the grand and per-symbol
3420 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info
*entry
,
3421 struct _bfinfdpic_dynamic_got_info
*dinfo
,
3422 bfd_boolean subtract
)
3424 bfd_vma relocs
= 0, fixups
= 0;
3426 if (!bfd_link_pde (dinfo
->info
))
3427 relocs
= entry
->relocs32
+ entry
->relocsfd
+ entry
->relocsfdv
;
3430 if (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
))
3432 if (entry
->symndx
!= -1
3433 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3434 fixups
+= entry
->relocs32
+ 2 * entry
->relocsfdv
;
3437 relocs
+= entry
->relocs32
+ entry
->relocsfdv
;
3439 if (entry
->symndx
!= -1
3440 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
))
3442 if (entry
->symndx
!= -1
3443 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3444 fixups
+= entry
->relocsfd
;
3447 relocs
+= entry
->relocsfd
;
3456 entry
->dynrelocs
+= relocs
;
3457 entry
->fixups
+= fixups
;
3458 dinfo
->relocs
+= relocs
;
3459 dinfo
->fixups
+= fixups
;
3462 /* Compute the total GOT and PLT size required by each symbol in each range. *
3463 Symbols may require up to 4 words in the GOT: an entry pointing to
3464 the symbol, an entry pointing to its function descriptor, and a
3465 private function descriptors taking two words. */
3468 _bfinfdpic_count_got_plt_entries (void **entryp
, void *dinfo_
)
3470 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3471 struct _bfinfdpic_dynamic_got_info
*dinfo
= dinfo_
;
3473 _bfinfdpic_count_nontls_entries (entry
, dinfo
);
3475 _bfinfdpic_count_relocs_fixups (entry
, dinfo
, FALSE
);
3480 /* This structure is used to assign offsets to got entries, function
3481 descriptors, plt entries and lazy plt entries. */
3483 struct _bfinfdpic_dynamic_got_plt_info
3485 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3486 struct _bfinfdpic_dynamic_got_info g
;
3488 /* For each addressable range, we record a MAX (positive) and MIN
3489 (negative) value. CUR is used to assign got entries, and it's
3490 incremented from an initial positive value to MAX, then from MIN
3491 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3492 assign function descriptors, and it's decreased from an initial
3493 non-positive value to MIN, then from MAX down to CUR (unless CUR
3494 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3495 to even words. ODD, if non-zero, indicates an odd word to be
3496 used for the next got entry, otherwise CUR is used and
3497 incremented by a pair of words, wrapping around when it reaches
3498 MAX. FDCUR is decremented (and wrapped) before the next function
3499 descriptor is chosen. FDPLT indicates the number of remaining
3500 slots that can be used for function descriptors used only by PLT
3502 struct _bfinfdpic_dynamic_got_alloc_data
3504 bfd_signed_vma max
, cur
, odd
, fdcur
, min
;
3509 /* Determine the positive and negative ranges to be used by each
3510 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3511 double-word boundary, are the minimum (negative) and maximum
3512 (positive) GOT offsets already used by previous ranges, except for
3513 an ODD entry that may have been left behind. GOT and FD indicate
3514 the size of GOT entries and function descriptors that must be
3515 placed within the range from -WRAP to WRAP. If there's room left,
3516 up to FDPLT bytes should be reserved for additional function
3519 inline static bfd_signed_vma
3520 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data
*gad
,
3521 bfd_signed_vma fdcur
,
3529 bfd_signed_vma wrapmin
= -wrap
;
3531 /* Start at the given initial points. */
3535 /* If we had an incoming odd word and we have any got entries that
3536 are going to use it, consume it, otherwise leave gad->odd at
3537 zero. We might force gad->odd to zero and return the incoming
3538 odd such that it is used by the next range, but then GOT entries
3539 might appear to be out of order and we wouldn't be able to
3540 shorten the GOT by one word if it turns out to end with an
3541 unpaired GOT entry. */
3551 /* If we're left with an unpaired GOT entry, compute its location
3552 such that we can return it. Otherwise, if got doesn't require an
3553 odd number of words here, either odd was already zero in the
3554 block above, or it was set to zero because got was non-zero, or
3555 got was already zero. In the latter case, we want the value of
3556 odd to carry over to the return statement, so we don't want to
3557 reset odd unless the condition below is true. */
3564 /* Compute the tentative boundaries of this range. */
3565 gad
->max
= cur
+ got
;
3566 gad
->min
= fdcur
- fd
;
3569 /* If function descriptors took too much space, wrap some of them
3571 if (gad
->min
< wrapmin
)
3573 gad
->max
+= wrapmin
- gad
->min
;
3576 /* If there is space left and we have function descriptors
3577 referenced in PLT entries that could take advantage of shorter
3578 offsets, place them here. */
3579 else if (fdplt
&& gad
->min
> wrapmin
)
3582 if ((bfd_vma
) (gad
->min
- wrapmin
) < fdplt
)
3583 fds
= gad
->min
- wrapmin
;
3592 /* If GOT entries took too much space, wrap some of them around.
3593 This may well cause gad->min to become lower than wrapmin. This
3594 will cause a relocation overflow later on, so we don't have to
3596 if ((bfd_vma
) gad
->max
> wrap
)
3598 gad
->min
-= gad
->max
- wrap
;
3601 /* If there is more space left, try to place some more function
3602 descriptors for PLT entries. */
3603 else if (fdplt
&& (bfd_vma
) gad
->max
< wrap
)
3606 if ((bfd_vma
) (wrap
- gad
->max
) < fdplt
)
3607 fds
= wrap
- gad
->max
;
3616 /* If odd was initially computed as an offset past the wrap point,
3619 odd
= gad
->min
+ odd
- gad
->max
;
3621 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3622 before returning, so do it here too. This guarantees that,
3623 should cur and fdcur meet at the wrap point, they'll both be
3625 if (gad
->cur
== gad
->max
)
3626 gad
->cur
= gad
->min
;
3631 /* Compute the location of the next GOT entry, given the allocation
3632 data for a range. */
3634 inline static bfd_signed_vma
3635 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3641 /* If there was an odd word left behind, use it. */
3647 /* Otherwise, use the word pointed to by cur, reserve the next
3648 as an odd word, and skip to the next pair of words, possibly
3651 gad
->odd
= gad
->cur
+ 4;
3653 if (gad
->cur
== gad
->max
)
3654 gad
->cur
= gad
->min
;
3660 /* Compute the location of the next function descriptor entry in the
3661 GOT, given the allocation data for a range. */
3663 inline static bfd_signed_vma
3664 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3666 /* If we're at the bottom, wrap around, and only then allocate the
3667 next pair of words. */
3668 if (gad
->fdcur
== gad
->min
)
3669 gad
->fdcur
= gad
->max
;
3670 return gad
->fdcur
-= 8;
3673 /* Assign GOT offsets for every GOT entry and function descriptor.
3674 Doing everything in a single pass is tricky. */
3677 _bfinfdpic_assign_got_entries (void **entryp
, void *info_
)
3679 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3680 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3683 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3684 else if (entry
->gothilo
)
3685 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3687 if (entry
->fdgot17m4
)
3688 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3689 else if (entry
->fdgothilo
)
3690 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3692 if (entry
->fdgoff17m4
)
3693 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3694 else if (entry
->plt
&& dinfo
->got17m4
.fdplt
)
3696 dinfo
->got17m4
.fdplt
-= 8;
3697 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3699 else if (entry
->plt
)
3701 dinfo
->gothilo
.fdplt
-= 8;
3702 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3704 else if (entry
->privfd
)
3705 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3710 /* Assign GOT offsets to private function descriptors used by PLT
3711 entries (or referenced by 32-bit offsets), as well as PLT entries
3712 and lazy PLT entries. */
3715 _bfinfdpic_assign_plt_entries (void **entryp
, void *info_
)
3717 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3718 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3720 /* If this symbol requires a local function descriptor, allocate
3722 if (entry
->privfd
&& entry
->fd_entry
== 0)
3724 if (dinfo
->got17m4
.fdplt
)
3726 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3727 dinfo
->got17m4
.fdplt
-= 8;
3731 BFD_ASSERT (dinfo
->gothilo
.fdplt
);
3732 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3733 dinfo
->gothilo
.fdplt
-= 8;
3741 /* We use the section's raw size to mark the location of the
3743 entry
->plt_entry
= bfinfdpic_plt_section (dinfo
->g
.info
)->size
;
3745 /* Figure out the length of this PLT entry based on the
3746 addressing mode we need to reach the function descriptor. */
3747 BFD_ASSERT (entry
->fd_entry
);
3748 if (entry
->fd_entry
>= -(1 << (18 - 1))
3749 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
3754 bfinfdpic_plt_section (dinfo
->g
.info
)->size
+= size
;
3759 entry
->lzplt_entry
= dinfo
->g
.lzplt
;
3760 dinfo
->g
.lzplt
+= LZPLT_NORMAL_SIZE
;
3761 /* If this entry is the one that gets the resolver stub, account
3762 for the additional instruction. */
3763 if (entry
->lzplt_entry
% BFINFDPIC_LZPLT_BLOCK_SIZE
3764 == BFINFDPIC_LZPLT_RESOLV_LOC
)
3765 dinfo
->g
.lzplt
+= LZPLT_RESOLVER_EXTRA
;
3771 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3772 _bfinfdpic_assign_plt_entries. */
3775 _bfinfdpic_reset_got_plt_entries (void **entryp
, void *ignore ATTRIBUTE_UNUSED
)
3777 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3779 entry
->got_entry
= 0;
3780 entry
->fdgot_entry
= 0;
3781 entry
->fd_entry
= 0;
3782 entry
->plt_entry
= (bfd_vma
)-1;
3783 entry
->lzplt_entry
= (bfd_vma
)-1;
3788 /* Follow indirect and warning hash entries so that each got entry
3789 points to the final symbol definition. P must point to a pointer
3790 to the hash table we're traversing. Since this traversal may
3791 modify the hash table, we set this pointer to NULL to indicate
3792 we've made a potentially-destructive change to the hash table, so
3793 the traversal must be restarted. */
3795 _bfinfdpic_resolve_final_relocs_info (void **entryp
, void *p
)
3797 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3800 if (entry
->symndx
== -1)
3802 struct elf_link_hash_entry
*h
= entry
->d
.h
;
3803 struct bfinfdpic_relocs_info
*oentry
;
3805 while (h
->root
.type
== bfd_link_hash_indirect
3806 || h
->root
.type
== bfd_link_hash_warning
)
3807 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
3809 if (entry
->d
.h
== h
)
3812 oentry
= bfinfdpic_relocs_info_for_global (*htab
, 0, h
, entry
->addend
,
3817 /* Merge the two entries. */
3818 bfinfdpic_pic_merge_early_relocs_info (oentry
, entry
);
3819 htab_clear_slot (*htab
, entryp
);
3825 /* If we can't find this entry with the new bfd hash, re-insert
3826 it, and get the traversal restarted. */
3827 if (! htab_find (*htab
, entry
))
3829 htab_clear_slot (*htab
, entryp
);
3830 entryp
= htab_find_slot (*htab
, entry
, INSERT
);
3833 /* Abort the traversal, since the whole table may have
3834 moved, and leave it up to the parent to restart the
3836 *(htab_t
*)p
= NULL
;
3844 /* Compute the total size of the GOT, the PLT, the dynamic relocations
3845 section and the rofixup section. Assign locations for GOT and PLT
3849 _bfinfdpic_size_got_plt (bfd
*output_bfd
,
3850 struct _bfinfdpic_dynamic_got_plt_info
*gpinfop
)
3854 struct bfd_link_info
*info
= gpinfop
->g
.info
;
3855 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
3857 memcpy (bfinfdpic_dynamic_got_plt_info (info
), &gpinfop
->g
,
3858 sizeof (gpinfop
->g
));
3861 /* Compute the total size taken by entries in the 18-bit range,
3862 to tell how many PLT function descriptors we can bring into it
3863 without causing it to overflow. */
3864 limit
= odd
+ gpinfop
->g
.got17m4
+ gpinfop
->g
.fd17m4
;
3865 if (limit
< (bfd_vma
)1 << 18)
3866 limit
= ((bfd_vma
)1 << 18) - limit
;
3869 if (gpinfop
->g
.fdplt
< limit
)
3870 limit
= gpinfop
->g
.fdplt
;
3872 /* Determine the ranges of GOT offsets that we can use for each
3873 range of addressing modes. */
3874 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->got17m4
,
3881 (bfd_vma
)1 << (18-1));
3882 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfop
->gothilo
,
3883 gpinfop
->got17m4
.min
,
3885 gpinfop
->got17m4
.max
,
3888 gpinfop
->g
.fdplt
- gpinfop
->got17m4
.fdplt
,
3889 (bfd_vma
)1 << (32-1));
3891 /* Now assign (most) GOT offsets. */
3892 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_got_entries
,
3895 bfinfdpic_got_section (info
)->size
= gpinfop
->gothilo
.max
3896 - gpinfop
->gothilo
.min
3897 /* If an odd word is the last word of the GOT, we don't need this
3898 word to be part of the GOT. */
3899 - (odd
+ 4 == gpinfop
->gothilo
.max
? 4 : 0);
3900 if (bfinfdpic_got_section (info
)->size
== 0)
3901 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3902 else if (bfinfdpic_got_section (info
)->size
== 12
3903 && ! elf_hash_table (info
)->dynamic_sections_created
)
3905 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
3906 bfinfdpic_got_section (info
)->size
= 0;
3910 bfinfdpic_got_section (info
)->contents
=
3911 (bfd_byte
*) bfd_zalloc (dynobj
,
3912 bfinfdpic_got_section (info
)->size
);
3913 if (bfinfdpic_got_section (info
)->contents
== NULL
)
3917 if (elf_hash_table (info
)->dynamic_sections_created
)
3918 /* Subtract the number of lzplt entries, since those will generate
3919 relocations in the pltrel section. */
3920 bfinfdpic_gotrel_section (info
)->size
=
3921 (gpinfop
->g
.relocs
- gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
)
3922 * get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3924 BFD_ASSERT (gpinfop
->g
.relocs
== 0);
3925 if (bfinfdpic_gotrel_section (info
)->size
== 0)
3926 bfinfdpic_gotrel_section (info
)->flags
|= SEC_EXCLUDE
;
3929 bfinfdpic_gotrel_section (info
)->contents
=
3930 (bfd_byte
*) bfd_zalloc (dynobj
,
3931 bfinfdpic_gotrel_section (info
)->size
);
3932 if (bfinfdpic_gotrel_section (info
)->contents
== NULL
)
3936 bfinfdpic_gotfixup_section (info
)->size
= (gpinfop
->g
.fixups
+ 1) * 4;
3937 if (bfinfdpic_gotfixup_section (info
)->size
== 0)
3938 bfinfdpic_gotfixup_section (info
)->flags
|= SEC_EXCLUDE
;
3941 bfinfdpic_gotfixup_section (info
)->contents
=
3942 (bfd_byte
*) bfd_zalloc (dynobj
,
3943 bfinfdpic_gotfixup_section (info
)->size
);
3944 if (bfinfdpic_gotfixup_section (info
)->contents
== NULL
)
3948 if (elf_hash_table (info
)->dynamic_sections_created
)
3949 bfinfdpic_pltrel_section (info
)->size
=
3950 gpinfop
->g
.lzplt
/ LZPLT_NORMAL_SIZE
* get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
3951 if (bfinfdpic_pltrel_section (info
)->size
== 0)
3952 bfinfdpic_pltrel_section (info
)->flags
|= SEC_EXCLUDE
;
3955 bfinfdpic_pltrel_section (info
)->contents
=
3956 (bfd_byte
*) bfd_zalloc (dynobj
,
3957 bfinfdpic_pltrel_section (info
)->size
);
3958 if (bfinfdpic_pltrel_section (info
)->contents
== NULL
)
3962 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
3963 such that there's room for the additional instruction needed to
3964 call the resolver. Since _bfinfdpic_assign_got_entries didn't
3965 account for them, our block size is 4 bytes smaller than the real
3967 if (elf_hash_table (info
)->dynamic_sections_created
)
3969 bfinfdpic_plt_section (info
)->size
= gpinfop
->g
.lzplt
3970 + ((gpinfop
->g
.lzplt
+ (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) - LZPLT_NORMAL_SIZE
)
3971 / (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) * LZPLT_RESOLVER_EXTRA
);
3974 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
3975 actually assign lazy PLT entries addresses. */
3976 gpinfop
->g
.lzplt
= 0;
3978 /* Save information that we're going to need to generate GOT and PLT
3980 bfinfdpic_got_initial_offset (info
) = -gpinfop
->gothilo
.min
;
3982 if (get_elf_backend_data (output_bfd
)->want_got_sym
)
3983 elf_hash_table (info
)->hgot
->root
.u
.def
.value
3984 = bfinfdpic_got_initial_offset (info
);
3986 if (elf_hash_table (info
)->dynamic_sections_created
)
3987 bfinfdpic_plt_initial_offset (info
) =
3988 bfinfdpic_plt_section (info
)->size
;
3990 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_plt_entries
,
3993 /* Allocate the PLT section contents only after
3994 _bfinfdpic_assign_plt_entries has a chance to add the size of the
3995 non-lazy PLT entries. */
3996 if (bfinfdpic_plt_section (info
)->size
== 0)
3997 bfinfdpic_plt_section (info
)->flags
|= SEC_EXCLUDE
;
4000 bfinfdpic_plt_section (info
)->contents
=
4001 (bfd_byte
*) bfd_zalloc (dynobj
,
4002 bfinfdpic_plt_section (info
)->size
);
4003 if (bfinfdpic_plt_section (info
)->contents
== NULL
)
4010 /* Set the sizes of the dynamic sections. */
4013 elf32_bfinfdpic_size_dynamic_sections (bfd
*output_bfd
,
4014 struct bfd_link_info
*info
)
4016 struct elf_link_hash_table
*htab
;
4019 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4021 htab
= elf_hash_table (info
);
4022 dynobj
= htab
->dynobj
;
4023 BFD_ASSERT (dynobj
!= NULL
);
4025 if (htab
->dynamic_sections_created
)
4027 /* Set the contents of the .interp section to the interpreter. */
4028 if (bfd_link_executable (info
) && !info
->nointerp
)
4030 s
= bfd_get_linker_section (dynobj
, ".interp");
4031 BFD_ASSERT (s
!= NULL
);
4032 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
4033 s
->contents
= (bfd_byte
*) ELF_DYNAMIC_INTERPRETER
;
4037 memset (&gpinfo
, 0, sizeof (gpinfo
));
4038 gpinfo
.g
.info
= info
;
4042 htab_t relocs
= bfinfdpic_relocs_info (info
);
4044 htab_traverse (relocs
, _bfinfdpic_resolve_final_relocs_info
, &relocs
);
4046 if (relocs
== bfinfdpic_relocs_info (info
))
4050 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_count_got_plt_entries
,
4053 /* Allocate space to save the summary information, we're going to
4054 use it if we're doing relaxations. */
4055 bfinfdpic_dynamic_got_plt_info (info
) = bfd_alloc (dynobj
, sizeof (gpinfo
.g
));
4057 if (!_bfinfdpic_size_got_plt (output_bfd
, &gpinfo
))
4060 if (elf_hash_table (info
)->dynamic_sections_created
)
4062 if (bfinfdpic_got_section (info
)->size
)
4063 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTGOT
, 0))
4066 if (bfinfdpic_pltrel_section (info
)->size
)
4067 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
4068 || !_bfd_elf_add_dynamic_entry (info
, DT_PLTREL
, DT_REL
)
4069 || !_bfd_elf_add_dynamic_entry (info
, DT_JMPREL
, 0))
4072 if (bfinfdpic_gotrel_section (info
)->size
)
4073 if (!_bfd_elf_add_dynamic_entry (info
, DT_REL
, 0)
4074 || !_bfd_elf_add_dynamic_entry (info
, DT_RELSZ
, 0)
4075 || !_bfd_elf_add_dynamic_entry (info
, DT_RELENT
,
4076 sizeof (Elf32_External_Rel
)))
4080 s
= bfd_get_linker_section (dynobj
, ".dynbss");
4081 if (s
&& s
->size
== 0)
4082 s
->flags
|= SEC_EXCLUDE
;
4084 s
= bfd_get_linker_section (dynobj
, ".rela.bss");
4085 if (s
&& s
->size
== 0)
4086 s
->flags
|= SEC_EXCLUDE
;
4092 elf32_bfinfdpic_always_size_sections (bfd
*output_bfd
,
4093 struct bfd_link_info
*info
)
4095 if (!bfd_link_relocatable (info
)
4096 && !bfd_elf_stack_segment_size (output_bfd
, info
,
4097 "__stacksize", DEFAULT_STACK_SIZE
))
4103 /* Check whether any of the relocations was optimized away, and
4104 subtract it from the relocation or fixup count. */
4106 _bfinfdpic_check_discarded_relocs (bfd
*abfd
, asection
*sec
,
4107 struct bfd_link_info
*info
,
4108 bfd_boolean
*changed
)
4110 Elf_Internal_Shdr
*symtab_hdr
;
4111 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
4112 Elf_Internal_Rela
*rel
, *erel
;
4114 if ((sec
->flags
& SEC_RELOC
) == 0
4115 || sec
->reloc_count
== 0)
4118 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4119 sym_hashes
= elf_sym_hashes (abfd
);
4120 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
4121 if (!elf_bad_symtab (abfd
))
4122 sym_hashes_end
-= symtab_hdr
->sh_info
;
4124 rel
= elf_section_data (sec
)->relocs
;
4126 /* Now examine each relocation. */
4127 for (erel
= rel
+ sec
->reloc_count
; rel
< erel
; rel
++)
4129 struct elf_link_hash_entry
*h
;
4130 unsigned long r_symndx
;
4131 struct bfinfdpic_relocs_info
*picrel
;
4132 struct _bfinfdpic_dynamic_got_info
*dinfo
;
4134 if (ELF32_R_TYPE (rel
->r_info
) != R_BFIN_BYTE4_DATA
4135 && ELF32_R_TYPE (rel
->r_info
) != R_BFIN_FUNCDESC
)
4138 if (_bfd_elf_section_offset (sec
->output_section
->owner
,
4139 info
, sec
, rel
->r_offset
)
4143 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4144 if (r_symndx
< symtab_hdr
->sh_info
)
4148 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4149 while (h
->root
.type
== bfd_link_hash_indirect
4150 || h
->root
.type
== bfd_link_hash_warning
)
4151 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
4155 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4157 rel
->r_addend
, NO_INSERT
);
4159 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info
),
4161 rel
->r_addend
, NO_INSERT
);
4167 dinfo
= bfinfdpic_dynamic_got_plt_info (info
);
4169 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, TRUE
);
4170 if (ELF32_R_TYPE (rel
->r_info
) == R_BFIN_BYTE4_DATA
)
4172 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4174 _bfinfdpic_count_relocs_fixups (picrel
, dinfo
, FALSE
);
4181 bfinfdpic_elf_discard_info (bfd
*ibfd
,
4182 struct elf_reloc_cookie
*cookie ATTRIBUTE_UNUSED
,
4183 struct bfd_link_info
*info
)
4185 bfd_boolean changed
= FALSE
;
4189 /* Account for relaxation of .eh_frame section. */
4190 for (s
= ibfd
->sections
; s
; s
= s
->next
)
4191 if (s
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
4193 if (!_bfinfdpic_check_discarded_relocs (ibfd
, s
, info
, &changed
))
4195 obfd
= s
->output_section
->owner
;
4200 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
4202 memset (&gpinfo
, 0, sizeof (gpinfo
));
4203 memcpy (&gpinfo
.g
, bfinfdpic_dynamic_got_plt_info (info
),
4206 /* Clear GOT and PLT assignments. */
4207 htab_traverse (bfinfdpic_relocs_info (info
),
4208 _bfinfdpic_reset_got_plt_entries
,
4211 if (!_bfinfdpic_size_got_plt (obfd
, &gpinfo
))
4219 elf32_bfinfdpic_finish_dynamic_sections (bfd
*output_bfd
,
4220 struct bfd_link_info
*info
)
4225 dynobj
= elf_hash_table (info
)->dynobj
;
4227 if (bfinfdpic_got_section (info
))
4229 BFD_ASSERT (bfinfdpic_gotrel_section (info
)->size
4230 /* PR 17334: It appears that the GOT section can end up
4231 being bigger than the number of relocs. Presumably
4232 because some relocs have been deleted. A test case has
4233 yet to be generated for verify this, but in the meantime
4234 the test below has been changed from == to >= so that
4235 applications can continue to be built. */
4236 >= (bfinfdpic_gotrel_section (info
)->reloc_count
4237 * sizeof (Elf32_External_Rel
)));
4239 if (bfinfdpic_gotfixup_section (info
))
4241 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
4242 bfd_vma got_value
= hgot
->root
.u
.def
.value
4243 + hgot
->root
.u
.def
.section
->output_section
->vma
4244 + hgot
->root
.u
.def
.section
->output_offset
;
4246 _bfinfdpic_add_rofixup (output_bfd
, bfinfdpic_gotfixup_section (info
),
4249 if (bfinfdpic_gotfixup_section (info
)->size
4250 != (bfinfdpic_gotfixup_section (info
)->reloc_count
* 4))
4253 ("LINKER BUG: .rofixup section size mismatch");
4258 if (elf_hash_table (info
)->dynamic_sections_created
)
4260 BFD_ASSERT (bfinfdpic_pltrel_section (info
)->size
4261 == (bfinfdpic_pltrel_section (info
)->reloc_count
4262 * sizeof (Elf32_External_Rel
)));
4265 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4267 if (elf_hash_table (info
)->dynamic_sections_created
)
4269 Elf32_External_Dyn
* dyncon
;
4270 Elf32_External_Dyn
* dynconend
;
4272 BFD_ASSERT (sdyn
!= NULL
);
4274 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4275 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4277 for (; dyncon
< dynconend
; dyncon
++)
4279 Elf_Internal_Dyn dyn
;
4281 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4289 dyn
.d_un
.d_ptr
= bfinfdpic_got_section (info
)->output_section
->vma
4290 + bfinfdpic_got_section (info
)->output_offset
4291 + bfinfdpic_got_initial_offset (info
);
4292 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4296 dyn
.d_un
.d_ptr
= bfinfdpic_pltrel_section (info
)
4297 ->output_section
->vma
4298 + bfinfdpic_pltrel_section (info
)->output_offset
;
4299 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4303 dyn
.d_un
.d_val
= bfinfdpic_pltrel_section (info
)->size
;
4304 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4313 /* Adjust a symbol defined by a dynamic object and referenced by a
4317 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4318 struct elf_link_hash_entry
*h
)
4322 dynobj
= elf_hash_table (info
)->dynobj
;
4324 /* Make sure we know what is going on here. */
4325 BFD_ASSERT (dynobj
!= NULL
4329 && !h
->def_regular
)));
4331 /* If this is a weak symbol, and there is a real definition, the
4332 processor independent code will have arranged for us to see the
4333 real definition first, and we can just use the same value. */
4334 if (h
->is_weakalias
)
4336 struct elf_link_hash_entry
*def
= weakdef (h
);
4337 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
4338 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
4339 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
4345 /* Perform any actions needed for dynamic symbols. */
4348 elf32_bfinfdpic_finish_dynamic_symbol
4349 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4350 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4351 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
4352 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4357 /* Decide whether to attempt to turn absptr or lsda encodings in
4358 shared libraries into pcrel within the given input section. */
4361 bfinfdpic_elf_use_relative_eh_frame
4362 (bfd
*input_bfd ATTRIBUTE_UNUSED
,
4363 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4364 asection
*eh_frame_section ATTRIBUTE_UNUSED
)
4366 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4370 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4373 bfinfdpic_elf_encode_eh_address (bfd
*abfd
,
4374 struct bfd_link_info
*info
,
4375 asection
*osec
, bfd_vma offset
,
4376 asection
*loc_sec
, bfd_vma loc_offset
,
4379 struct elf_link_hash_entry
*h
;
4381 h
= elf_hash_table (info
)->hgot
;
4382 BFD_ASSERT (h
&& h
->root
.type
== bfd_link_hash_defined
);
4384 if (! h
|| (_bfinfdpic_osec_to_segment (abfd
, osec
)
4385 == _bfinfdpic_osec_to_segment (abfd
, loc_sec
->output_section
)))
4386 return _bfd_elf_encode_eh_address (abfd
, info
, osec
, offset
,
4387 loc_sec
, loc_offset
, encoded
);
4389 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd
, osec
)
4390 == (_bfinfdpic_osec_to_segment
4391 (abfd
, h
->root
.u
.def
.section
->output_section
)));
4393 *encoded
= osec
->vma
+ offset
4394 - (h
->root
.u
.def
.value
4395 + h
->root
.u
.def
.section
->output_section
->vma
4396 + h
->root
.u
.def
.section
->output_offset
);
4398 return DW_EH_PE_datarel
| DW_EH_PE_sdata4
;
4403 /* Look through the relocs for a section during the first phase.
4405 Besides handling virtual table relocs for gc, we have to deal with
4406 all sorts of PIC-related relocations. We describe below the
4407 general plan on how to handle such relocations, even though we only
4408 collect information at this point, storing them in hash tables for
4409 perusal of later passes.
4411 32 relocations are propagated to the linker output when creating
4412 position-independent output. LO16 and HI16 relocations are not
4413 supposed to be encountered in this case.
4415 LABEL16 should always be resolvable by the linker, since it's only
4418 LABEL24, on the other hand, is used by calls. If it turns out that
4419 the target of a call is a dynamic symbol, a PLT entry must be
4420 created for it, which triggers the creation of a private function
4421 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4423 GPREL relocations require the referenced symbol to be in the same
4424 segment as _gp, but this can only be checked later.
4426 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4427 exist. LABEL24 might as well, since it may require a PLT entry,
4428 that will require a got.
4430 Non-FUNCDESC GOT relocations require a GOT entry to be created
4431 regardless of whether the symbol is dynamic. However, since a
4432 global symbol that turns out to not be exported may have the same
4433 address of a non-dynamic symbol, we don't assign GOT entries at
4434 this point, such that we can share them in this case. A relocation
4435 for the GOT entry always has to be created, be it to offset a
4436 private symbol by the section load address, be it to get the symbol
4437 resolved dynamically.
4439 FUNCDESC GOT relocations require a GOT entry to be created, and
4440 handled as if a FUNCDESC relocation was applied to the GOT entry in
4443 FUNCDESC relocations referencing a symbol that turns out to NOT be
4444 dynamic cause a private function descriptor to be created. The
4445 FUNCDESC relocation then decays to a 32 relocation that points at
4446 the private descriptor. If the symbol is dynamic, the FUNCDESC
4447 relocation is propagated to the linker output, such that the
4448 dynamic linker creates the canonical descriptor, pointing to the
4449 dynamically-resolved definition of the function.
4451 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4452 symbols that are assigned to the same segment as the GOT, but we
4453 can only check this later, after we know the complete set of
4454 symbols defined and/or exported.
4456 FUNCDESC GOTOFF relocations require a function descriptor to be
4457 created and, unless lazy binding is disabled or the symbol is not
4458 dynamic, a lazy PLT entry. Since we can't tell at this point
4459 whether a symbol is going to be dynamic, we have to decide later
4460 whether to create a lazy PLT entry or bind the descriptor directly
4461 to the private function.
4463 FUNCDESC_VALUE relocations are not supposed to be present in object
4464 files, but they may very well be simply propagated to the linker
4465 output, since they have no side effect.
4468 A function descriptor always requires a FUNCDESC_VALUE relocation.
4469 Whether it's in .plt.rel or not depends on whether lazy binding is
4470 enabled and on whether the referenced symbol is dynamic.
4472 The existence of a lazy PLT requires the resolverStub lazy PLT
4473 entry to be present.
4476 As for assignment of GOT, PLT and lazy PLT entries, and private
4477 descriptors, we might do them all sequentially, but we can do
4478 better than that. For example, we can place GOT entries and
4479 private function descriptors referenced using 12-bit operands
4480 closer to the PIC register value, such that these relocations don't
4481 overflow. Those that are only referenced with LO16 relocations
4482 could come next, but we may as well place PLT-required function
4483 descriptors in the 12-bit range to make them shorter. Symbols
4484 referenced with LO16/HI16 may come next, but we may place
4485 additional function descriptors in the 16-bit range if we can
4486 reliably tell that we've already placed entries that are ever
4487 referenced with only LO16. PLT entries are therefore generated as
4488 small as possible, while not introducing relocation overflows in
4489 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4490 generated before or after PLT entries, but not intermingled with
4491 them, such that we can have more lazy PLT entries in range for a
4492 branch to the resolverStub. The resolverStub should be emitted at
4493 the most distant location from the first lazy PLT entry such that
4494 it's still in range for a branch, or closer, if there isn't a need
4495 for so many lazy PLT entries. Additional lazy PLT entries may be
4496 emitted after the resolverStub, as long as branches are still in
4497 range. If the branch goes out of range, longer lazy PLT entries
4500 We could further optimize PLT and lazy PLT entries by giving them
4501 priority in assignment to closer-to-gr17 locations depending on the
4502 number of occurrences of references to them (assuming a function
4503 that's called more often is more important for performance, so its
4504 PLT entry should be faster), or taking hints from the compiler.
4505 Given infinite time and money... :-) */
4508 bfinfdpic_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4509 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4511 Elf_Internal_Shdr
*symtab_hdr
;
4512 struct elf_link_hash_entry
**sym_hashes
;
4513 const Elf_Internal_Rela
*rel
;
4514 const Elf_Internal_Rela
*rel_end
;
4516 struct bfinfdpic_relocs_info
*picrel
;
4518 if (bfd_link_relocatable (info
))
4521 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4522 sym_hashes
= elf_sym_hashes (abfd
);
4524 dynobj
= elf_hash_table (info
)->dynobj
;
4525 rel_end
= relocs
+ sec
->reloc_count
;
4526 for (rel
= relocs
; rel
< rel_end
; rel
++)
4528 struct elf_link_hash_entry
*h
;
4529 unsigned long r_symndx
;
4531 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4532 if (r_symndx
< symtab_hdr
->sh_info
)
4535 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4537 switch (ELF32_R_TYPE (rel
->r_info
))
4539 case R_BFIN_GOT17M4
:
4542 case R_BFIN_FUNCDESC_GOT17M4
:
4543 case R_BFIN_FUNCDESC_GOTHI
:
4544 case R_BFIN_FUNCDESC_GOTLO
:
4545 case R_BFIN_GOTOFF17M4
:
4546 case R_BFIN_GOTOFFHI
:
4547 case R_BFIN_GOTOFFLO
:
4548 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4549 case R_BFIN_FUNCDESC_GOTOFFHI
:
4550 case R_BFIN_FUNCDESC_GOTOFFLO
:
4551 case R_BFIN_FUNCDESC
:
4552 case R_BFIN_FUNCDESC_VALUE
:
4553 if (! IS_FDPIC (abfd
))
4556 case R_BFIN_PCREL24
:
4557 case R_BFIN_PCREL24_JUMP_L
:
4558 case R_BFIN_BYTE4_DATA
:
4559 if (IS_FDPIC (abfd
) && ! dynobj
)
4561 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4562 if (! _bfin_create_got_section (abfd
, info
))
4565 if (! IS_FDPIC (abfd
))
4572 if (h
->dynindx
== -1)
4573 switch (ELF_ST_VISIBILITY (h
->other
))
4579 bfd_elf_link_record_dynamic_symbol (info
, h
);
4583 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4585 rel
->r_addend
, INSERT
);
4588 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4589 (info
), abfd
, r_symndx
,
4590 rel
->r_addend
, INSERT
);
4600 switch (ELF32_R_TYPE (rel
->r_info
))
4602 case R_BFIN_PCREL24
:
4603 case R_BFIN_PCREL24_JUMP_L
:
4604 if (IS_FDPIC (abfd
))
4608 case R_BFIN_FUNCDESC_VALUE
:
4609 picrel
->relocsfdv
++;
4610 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4614 case R_BFIN_BYTE4_DATA
:
4615 if (! IS_FDPIC (abfd
))
4619 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4623 case R_BFIN_GOT17M4
:
4632 case R_BFIN_FUNCDESC_GOT17M4
:
4633 picrel
->fdgot17m4
++;
4636 case R_BFIN_FUNCDESC_GOTHI
:
4637 case R_BFIN_FUNCDESC_GOTLO
:
4638 picrel
->fdgothilo
++;
4641 case R_BFIN_GOTOFF17M4
:
4642 case R_BFIN_GOTOFFHI
:
4643 case R_BFIN_GOTOFFLO
:
4647 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4648 picrel
->fdgoff17m4
++;
4651 case R_BFIN_FUNCDESC_GOTOFFHI
:
4652 case R_BFIN_FUNCDESC_GOTOFFLO
:
4653 picrel
->fdgoffhilo
++;
4656 case R_BFIN_FUNCDESC
:
4661 /* This relocation describes the C++ object vtable hierarchy.
4662 Reconstruct it for later use during GC. */
4663 case R_BFIN_GNU_VTINHERIT
:
4664 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4668 /* This relocation describes which C++ vtable entries are actually
4669 used. Record for later use during GC. */
4670 case R_BFIN_GNU_VTENTRY
:
4671 BFD_ASSERT (h
!= NULL
);
4673 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4677 case R_BFIN_HUIMM16
:
4678 case R_BFIN_LUIMM16
:
4679 case R_BFIN_PCREL12_JUMP_S
:
4680 case R_BFIN_PCREL10
:
4686 /* xgettext:c-format */
4687 (_("%B: unsupported relocation type %d"),
4688 abfd
, (int) ELF32_R_TYPE (rel
->r_info
));
4696 /* Set the right machine number for a Blackfin ELF file. */
4699 elf32_bfin_object_p (bfd
*abfd
)
4701 bfd_default_set_arch_mach (abfd
, bfd_arch_bfin
, 0);
4702 return (((elf_elfheader (abfd
)->e_flags
& EF_BFIN_FDPIC
) != 0)
4703 == (IS_FDPIC (abfd
)));
4707 elf32_bfin_set_private_flags (bfd
* abfd
, flagword flags
)
4709 elf_elfheader (abfd
)->e_flags
= flags
;
4710 elf_flags_init (abfd
) = TRUE
;
4714 /* Display the flags field. */
4716 elf32_bfin_print_private_bfd_data (bfd
* abfd
, void * ptr
)
4718 FILE *file
= (FILE *) ptr
;
4721 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
4723 /* Print normal ELF private data. */
4724 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
4726 flags
= elf_elfheader (abfd
)->e_flags
;
4728 /* xgettext:c-format */
4729 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
4731 if (flags
& EF_BFIN_PIC
)
4732 fprintf (file
, " -fpic");
4734 if (flags
& EF_BFIN_FDPIC
)
4735 fprintf (file
, " -mfdpic");
4742 /* Merge backend specific data from an object file to the output
4743 object file when linking. */
4746 elf32_bfin_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
4748 bfd
*obfd
= info
->output_bfd
;
4749 flagword old_flags
, new_flags
;
4750 bfd_boolean error
= FALSE
;
4752 new_flags
= elf_elfheader (ibfd
)->e_flags
;
4753 old_flags
= elf_elfheader (obfd
)->e_flags
;
4755 if (new_flags
& EF_BFIN_FDPIC
)
4756 new_flags
&= ~EF_BFIN_PIC
;
4762 ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %B",
4763 old_flags
, new_flags
, elf_flags_init (obfd
) ? "yes" : "no", ibfd
);
4765 if (!elf_flags_init (obfd
)) /* First call, no flags set. */
4767 elf_flags_init (obfd
) = TRUE
;
4768 elf_elfheader (obfd
)->e_flags
= new_flags
;
4771 if (((new_flags
& EF_BFIN_FDPIC
) == 0) != (! IS_FDPIC (obfd
)))
4774 if (IS_FDPIC (obfd
))
4776 (_("%B: cannot link non-fdpic object file into fdpic executable"),
4780 (_("%B: cannot link fdpic object file into non-fdpic executable"),
4785 bfd_set_error (bfd_error_bad_value
);
4790 /* bfin ELF linker hash entry. */
4792 struct bfin_link_hash_entry
4794 struct elf_link_hash_entry root
;
4796 /* Number of PC relative relocs copied for this symbol. */
4797 struct bfin_pcrel_relocs_copied
*pcrel_relocs_copied
;
4800 /* bfin ELF linker hash table. */
4802 struct bfin_link_hash_table
4804 struct elf_link_hash_table root
;
4806 /* Small local sym cache. */
4807 struct sym_cache sym_cache
;
4810 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4812 static struct bfd_hash_entry
*
4813 bfin_link_hash_newfunc (struct bfd_hash_entry
*entry
,
4814 struct bfd_hash_table
*table
, const char *string
)
4816 struct bfd_hash_entry
*ret
= entry
;
4818 /* Allocate the structure if it has not already been allocated by a
4821 ret
= bfd_hash_allocate (table
, sizeof (struct bfin_link_hash_entry
));
4825 /* Call the allocation method of the superclass. */
4826 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
4828 bfin_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
4833 /* Create an bfin ELF linker hash table. */
4835 static struct bfd_link_hash_table
*
4836 bfin_link_hash_table_create (bfd
* abfd
)
4838 struct bfin_link_hash_table
*ret
;
4839 bfd_size_type amt
= sizeof (struct bfin_link_hash_table
);
4841 ret
= bfd_zmalloc (amt
);
4845 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
4846 bfin_link_hash_newfunc
,
4847 sizeof (struct elf_link_hash_entry
),
4854 ret
->sym_cache
.abfd
= NULL
;
4856 return &ret
->root
.root
;
4859 /* The size in bytes of an entry in the procedure linkage table. */
4861 /* Finish up the dynamic sections. */
4864 bfin_finish_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4865 struct bfd_link_info
*info
)
4870 dynobj
= elf_hash_table (info
)->dynobj
;
4872 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4874 if (elf_hash_table (info
)->dynamic_sections_created
)
4876 Elf32_External_Dyn
*dyncon
, *dynconend
;
4878 BFD_ASSERT (sdyn
!= NULL
);
4880 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4881 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4882 for (; dyncon
< dynconend
; dyncon
++)
4884 Elf_Internal_Dyn dyn
;
4886 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4894 /* Finish up dynamic symbol handling. We set the contents of various
4895 dynamic sections here. */
4898 bfin_finish_dynamic_symbol (bfd
* output_bfd
,
4899 struct bfd_link_info
*info
,
4900 struct elf_link_hash_entry
*h
,
4901 Elf_Internal_Sym
* sym
)
4903 if (h
->got
.offset
!= (bfd_vma
) - 1)
4907 Elf_Internal_Rela rela
;
4910 /* This symbol has an entry in the global offset table.
4913 sgot
= elf_hash_table (info
)->sgot
;
4914 srela
= elf_hash_table (info
)->srelgot
;
4915 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
4917 rela
.r_offset
= (sgot
->output_section
->vma
4918 + sgot
->output_offset
4919 + (h
->got
.offset
& ~(bfd_vma
) 1));
4921 /* If this is a -Bsymbolic link, and the symbol is defined
4922 locally, we just want to emit a RELATIVE reloc. Likewise if
4923 the symbol was forced to be local because of a version file.
4924 The entry in the global offset table will already have been
4925 initialized in the relocate_section function. */
4926 if (bfd_link_pic (info
)
4928 || h
->dynindx
== -1 || h
->forced_local
) && h
->def_regular
)
4930 _bfd_error_handler (_("*** check this relocation %s"),
4932 rela
.r_info
= ELF32_R_INFO (0, R_BFIN_PCREL24
);
4933 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
4937 offset
& ~(bfd_vma
) 1)));
4941 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4942 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
4943 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_BFIN_GOT
);
4947 loc
= srela
->contents
;
4948 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
4949 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
4956 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4957 if (strcmp (h
->root
.root
.string
, "__DYNAMIC") == 0
4958 || h
== elf_hash_table (info
)->hgot
)
4959 sym
->st_shndx
= SHN_ABS
;
4964 /* Adjust a symbol defined by a dynamic object and referenced by a
4965 regular object. The current definition is in some section of the
4966 dynamic object, but we're not including those sections. We have to
4967 change the definition to something the rest of the link can
4971 bfin_adjust_dynamic_symbol (struct bfd_link_info
*info
,
4972 struct elf_link_hash_entry
*h
)
4976 unsigned int power_of_two
;
4978 dynobj
= elf_hash_table (info
)->dynobj
;
4980 /* Make sure we know what is going on here. */
4981 BFD_ASSERT (dynobj
!= NULL
4984 || (h
->def_dynamic
&& h
->ref_regular
&& !h
->def_regular
)));
4986 /* If this is a function, put it in the procedure linkage table. We
4987 will fill in the contents of the procedure linkage table later,
4988 when we know the address of the .got section. */
4989 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
4994 /* If this is a weak symbol, and there is a real definition, the
4995 processor independent code will have arranged for us to see the
4996 real definition first, and we can just use the same value. */
4997 if (h
->is_weakalias
)
4999 struct elf_link_hash_entry
*def
= weakdef (h
);
5000 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
5001 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
5002 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
5006 /* This is a reference to a symbol defined by a dynamic object which
5007 is not a function. */
5009 /* If we are creating a shared library, we must presume that the
5010 only references to the symbol are via the global offset table.
5011 For such cases we need not do anything here; the relocations will
5012 be handled correctly by relocate_section. */
5013 if (bfd_link_pic (info
))
5016 /* We must allocate the symbol in our .dynbss section, which will
5017 become part of the .bss section of the executable. There will be
5018 an entry for this symbol in the .dynsym section. The dynamic
5019 object will contain position independent code, so all references
5020 from the dynamic object to this symbol will go through the global
5021 offset table. The dynamic linker will use the .dynsym entry to
5022 determine the address it must put in the global offset table, so
5023 both the dynamic object and the regular object will refer to the
5024 same memory location for the variable. */
5026 s
= bfd_get_linker_section (dynobj
, ".dynbss");
5027 BFD_ASSERT (s
!= NULL
);
5029 #if 0 /* Bfin does not currently have a COPY reloc. */
5030 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to
5031 copy the initial value out of the dynamic object and into the
5032 runtime process image. We need to remember the offset into the
5033 .rela.bss section we are going to use. */
5034 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5038 srel
= bfd_get_linker_section (dynobj
, ".rela.bss");
5039 BFD_ASSERT (srel
!= NULL
);
5040 srel
->size
+= sizeof (Elf32_External_Rela
);
5044 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5046 _bfd_error_handler (_("the bfin target does not currently support the generation of copy relocations"));
5050 /* We need to figure out the alignment required for this symbol. I
5051 have no idea how ELF linkers handle this. */
5052 power_of_two
= bfd_log2 (h
->size
);
5053 if (power_of_two
> 3)
5056 /* Apply the required alignment. */
5057 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
5058 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
5060 if (!bfd_set_section_alignment (dynobj
, s
, power_of_two
))
5064 /* Define the symbol as being at this point in the section. */
5065 h
->root
.u
.def
.section
= s
;
5066 h
->root
.u
.def
.value
= s
->size
;
5068 /* Increment the section size to make room for the symbol. */
5074 /* The bfin linker needs to keep track of the number of relocs that it
5075 decides to copy in check_relocs for each symbol. This is so that it
5076 can discard PC relative relocs if it doesn't need them when linking
5077 with -Bsymbolic. We store the information in a field extending the
5078 regular ELF linker hash table. */
5080 /* This structure keeps track of the number of PC relative relocs we have
5081 copied for a given symbol. */
5083 struct bfin_pcrel_relocs_copied
5086 struct bfin_pcrel_relocs_copied
*next
;
5087 /* A section in dynobj. */
5089 /* Number of relocs copied in this section. */
5090 bfd_size_type count
;
5093 /* This function is called via elf_link_hash_traverse if we are
5094 creating a shared object. In the -Bsymbolic case it discards the
5095 space allocated to copy PC relative relocs against symbols which
5096 are defined in regular objects. For the normal shared case, it
5097 discards space for pc-relative relocs that have become local due to
5098 symbol visibility changes. We allocated space for them in the
5099 check_relocs routine, but we won't fill them in in the
5100 relocate_section routine.
5102 We also check whether any of the remaining relocations apply
5103 against a readonly section, and set the DF_TEXTREL flag in this
5107 bfin_discard_copies (struct elf_link_hash_entry
*h
, void * inf
)
5109 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5110 struct bfin_pcrel_relocs_copied
*s
;
5112 if (!h
->def_regular
|| (!info
->symbolic
&& !h
->forced_local
))
5114 if ((info
->flags
& DF_TEXTREL
) == 0)
5116 /* Look for relocations against read-only sections. */
5117 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5118 s
!= NULL
; s
= s
->next
)
5119 if ((s
->section
->flags
& SEC_READONLY
) != 0)
5121 info
->flags
|= DF_TEXTREL
;
5129 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5130 s
!= NULL
; s
= s
->next
)
5131 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
5137 bfin_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
5138 struct bfd_link_info
*info
)
5144 dynobj
= elf_hash_table (info
)->dynobj
;
5145 BFD_ASSERT (dynobj
!= NULL
);
5147 if (elf_hash_table (info
)->dynamic_sections_created
)
5149 /* Set the contents of the .interp section to the interpreter. */
5150 if (bfd_link_executable (info
) && !info
->nointerp
)
5152 s
= bfd_get_linker_section (dynobj
, ".interp");
5153 BFD_ASSERT (s
!= NULL
);
5154 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5155 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5160 /* We may have created entries in the .rela.got section.
5161 However, if we are not creating the dynamic sections, we will
5162 not actually use these entries. Reset the size of .rela.got,
5163 which will cause it to get stripped from the output file
5165 s
= elf_hash_table (info
)->srelgot
;
5170 /* If this is a -Bsymbolic shared link, then we need to discard all
5171 PC relative relocs against symbols defined in a regular object.
5172 For the normal shared case we discard the PC relative relocs
5173 against symbols that have become local due to visibility changes.
5174 We allocated space for them in the check_relocs routine, but we
5175 will not fill them in in the relocate_section routine. */
5176 if (bfd_link_pic (info
))
5177 elf_link_hash_traverse (elf_hash_table (info
),
5178 bfin_discard_copies
, info
);
5180 /* The check_relocs and adjust_dynamic_symbol entry points have
5181 determined the sizes of the various dynamic sections. Allocate
5184 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5189 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5192 /* It's OK to base decisions on the section name, because none
5193 of the dynobj section names depend upon the input files. */
5194 name
= bfd_get_section_name (dynobj
, s
);
5198 if (CONST_STRNEQ (name
, ".rela"))
5202 /* If we don't need this section, strip it from the
5203 output file. This is mostly to handle .rela.bss and
5204 .rela.plt. We must create both sections in
5205 create_dynamic_sections, because they must be created
5206 before the linker maps input sections to output
5207 sections. The linker does that before
5208 adjust_dynamic_symbol is called, and it is that
5209 function which decides whether anything needs to go
5210 into these sections. */
5217 /* We use the reloc_count field as a counter if we need
5218 to copy relocs into the output file. */
5222 else if (! CONST_STRNEQ (name
, ".got"))
5224 /* It's not one of our sections, so don't allocate space. */
5230 s
->flags
|= SEC_EXCLUDE
;
5234 /* Allocate memory for the section contents. */
5235 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5236 Unused entries should be reclaimed before the section's contents
5237 are written out, but at the moment this does not happen. Thus in
5238 order to prevent writing out garbage, we initialise the section's
5239 contents to zero. */
5240 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
5241 if (s
->contents
== NULL
&& s
->size
!= 0)
5245 if (elf_hash_table (info
)->dynamic_sections_created
)
5247 /* Add some entries to the .dynamic section. We fill in the
5248 values later, in bfin_finish_dynamic_sections, but we
5249 must add the entries now so that we get the correct size for
5250 the .dynamic section. The DT_DEBUG entry is filled in by the
5251 dynamic linker and used by the debugger. */
5252 #define add_dynamic_entry(TAG, VAL) \
5253 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5255 if (!bfd_link_pic (info
))
5257 if (!add_dynamic_entry (DT_DEBUG
, 0))
5264 if (!add_dynamic_entry (DT_RELA
, 0)
5265 || !add_dynamic_entry (DT_RELASZ
, 0)
5266 || !add_dynamic_entry (DT_RELAENT
,
5267 sizeof (Elf32_External_Rela
)))
5271 if ((info
->flags
& DF_TEXTREL
) != 0)
5273 if (!add_dynamic_entry (DT_TEXTREL
, 0))
5277 #undef add_dynamic_entry
5282 /* Given a .data section and a .emreloc in-memory section, store
5283 relocation information into the .emreloc section which can be
5284 used at runtime to relocate the section. This is called by the
5285 linker when the --embedded-relocs switch is used. This is called
5286 after the add_symbols entry point has been called for all the
5287 objects, and before the final_link entry point is called. */
5290 bfd_bfin_elf32_create_embedded_relocs (bfd
*abfd
,
5291 struct bfd_link_info
*info
,
5296 Elf_Internal_Shdr
*symtab_hdr
;
5297 Elf_Internal_Sym
*isymbuf
= NULL
;
5298 Elf_Internal_Rela
*internal_relocs
= NULL
;
5299 Elf_Internal_Rela
*irel
, *irelend
;
5303 BFD_ASSERT (! bfd_link_relocatable (info
));
5307 if (datasec
->reloc_count
== 0)
5310 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5312 /* Get a copy of the native relocations. */
5313 internal_relocs
= (_bfd_elf_link_read_relocs
5314 (abfd
, datasec
, NULL
, (Elf_Internal_Rela
*) NULL
,
5315 info
->keep_memory
));
5316 if (internal_relocs
== NULL
)
5319 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
5320 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
5321 if (relsec
->contents
== NULL
)
5324 p
= relsec
->contents
;
5326 irelend
= internal_relocs
+ datasec
->reloc_count
;
5327 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
5329 asection
*targetsec
;
5331 /* We are going to write a four byte longword into the runtime
5332 reloc section. The longword will be the address in the data
5333 section which must be relocated. It is followed by the name
5334 of the target section NUL-padded or truncated to 8
5337 /* We can only relocate absolute longword relocs at run time. */
5338 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_BFIN_BYTE4_DATA
)
5340 *errmsg
= _("unsupported reloc type");
5341 bfd_set_error (bfd_error_bad_value
);
5345 /* Get the target section referred to by the reloc. */
5346 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
5348 /* A local symbol. */
5349 Elf_Internal_Sym
*isym
;
5351 /* Read this BFD's local symbols if we haven't done so already. */
5352 if (isymbuf
== NULL
)
5354 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5355 if (isymbuf
== NULL
)
5356 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
5357 symtab_hdr
->sh_info
, 0,
5359 if (isymbuf
== NULL
)
5363 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
5364 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5369 struct elf_link_hash_entry
*h
;
5371 /* An external symbol. */
5372 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
5373 h
= elf_sym_hashes (abfd
)[indx
];
5374 BFD_ASSERT (h
!= NULL
);
5375 if (h
->root
.type
== bfd_link_hash_defined
5376 || h
->root
.type
== bfd_link_hash_defweak
)
5377 targetsec
= h
->root
.u
.def
.section
;
5382 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
5383 memset (p
+ 4, 0, 8);
5384 if (targetsec
!= NULL
)
5385 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
5388 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5390 if (internal_relocs
!= NULL
5391 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5392 free (internal_relocs
);
5396 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5398 if (internal_relocs
!= NULL
5399 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5400 free (internal_relocs
);
5404 struct bfd_elf_special_section
const elf32_bfin_special_sections
[] =
5406 { ".l1.text", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
5407 { ".l1.data", 8, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
5408 { NULL
, 0, 0, 0, 0 }
5412 #define TARGET_LITTLE_SYM bfin_elf32_vec
5413 #define TARGET_LITTLE_NAME "elf32-bfin"
5414 #define ELF_ARCH bfd_arch_bfin
5415 #define ELF_TARGET_ID BFIN_ELF_DATA
5416 #define ELF_MACHINE_CODE EM_BLACKFIN
5417 #define ELF_MAXPAGESIZE 0x1000
5418 #define elf_symbol_leading_char '_'
5420 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5421 #define bfd_elf32_bfd_reloc_name_lookup \
5422 bfin_bfd_reloc_name_lookup
5423 #define elf_info_to_howto bfin_info_to_howto
5424 #define elf_info_to_howto_rel 0
5425 #define elf_backend_object_p elf32_bfin_object_p
5427 #define bfd_elf32_bfd_is_local_label_name \
5428 bfin_is_local_label_name
5429 #define bfin_hash_table(p) \
5430 ((struct bfin_link_hash_table *) (p)->hash)
5434 #define elf_backend_create_dynamic_sections \
5435 _bfd_elf_create_dynamic_sections
5436 #define bfd_elf32_bfd_link_hash_table_create \
5437 bfin_link_hash_table_create
5438 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5440 #define elf_backend_check_relocs bfin_check_relocs
5441 #define elf_backend_adjust_dynamic_symbol \
5442 bfin_adjust_dynamic_symbol
5443 #define elf_backend_size_dynamic_sections \
5444 bfin_size_dynamic_sections
5445 #define elf_backend_relocate_section bfin_relocate_section
5446 #define elf_backend_finish_dynamic_symbol \
5447 bfin_finish_dynamic_symbol
5448 #define elf_backend_finish_dynamic_sections \
5449 bfin_finish_dynamic_sections
5450 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5451 #define bfd_elf32_bfd_merge_private_bfd_data \
5452 elf32_bfin_merge_private_bfd_data
5453 #define bfd_elf32_bfd_set_private_flags \
5454 elf32_bfin_set_private_flags
5455 #define bfd_elf32_bfd_print_private_bfd_data \
5456 elf32_bfin_print_private_bfd_data
5457 #define elf_backend_final_write_processing \
5458 elf32_bfin_final_write_processing
5459 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5460 #define elf_backend_stack_align 8
5461 #define elf_backend_can_gc_sections 1
5462 #define elf_backend_special_sections elf32_bfin_special_sections
5463 #define elf_backend_can_refcount 1
5464 #define elf_backend_want_got_plt 0
5465 #define elf_backend_plt_readonly 1
5466 #define elf_backend_want_plt_sym 0
5467 #define elf_backend_got_header_size 12
5468 #define elf_backend_rela_normal 1
5470 #include "elf32-target.h"
5472 #undef TARGET_LITTLE_SYM
5473 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5474 #undef TARGET_LITTLE_NAME
5475 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5477 #define elf32_bed elf32_bfinfdpic_bed
5479 #undef elf_backend_got_header_size
5480 #define elf_backend_got_header_size 0
5482 #undef elf_backend_relocate_section
5483 #define elf_backend_relocate_section bfinfdpic_relocate_section
5484 #undef elf_backend_check_relocs
5485 #define elf_backend_check_relocs bfinfdpic_check_relocs
5487 #undef bfd_elf32_bfd_link_hash_table_create
5488 #define bfd_elf32_bfd_link_hash_table_create \
5489 bfinfdpic_elf_link_hash_table_create
5490 #undef elf_backend_always_size_sections
5491 #define elf_backend_always_size_sections \
5492 elf32_bfinfdpic_always_size_sections
5494 #undef elf_backend_create_dynamic_sections
5495 #define elf_backend_create_dynamic_sections \
5496 elf32_bfinfdpic_create_dynamic_sections
5497 #undef elf_backend_adjust_dynamic_symbol
5498 #define elf_backend_adjust_dynamic_symbol \
5499 elf32_bfinfdpic_adjust_dynamic_symbol
5500 #undef elf_backend_size_dynamic_sections
5501 #define elf_backend_size_dynamic_sections \
5502 elf32_bfinfdpic_size_dynamic_sections
5503 #undef elf_backend_finish_dynamic_symbol
5504 #define elf_backend_finish_dynamic_symbol \
5505 elf32_bfinfdpic_finish_dynamic_symbol
5506 #undef elf_backend_finish_dynamic_sections
5507 #define elf_backend_finish_dynamic_sections \
5508 elf32_bfinfdpic_finish_dynamic_sections
5510 #undef elf_backend_discard_info
5511 #define elf_backend_discard_info \
5512 bfinfdpic_elf_discard_info
5513 #undef elf_backend_can_make_relative_eh_frame
5514 #define elf_backend_can_make_relative_eh_frame \
5515 bfinfdpic_elf_use_relative_eh_frame
5516 #undef elf_backend_can_make_lsda_relative_eh_frame
5517 #define elf_backend_can_make_lsda_relative_eh_frame \
5518 bfinfdpic_elf_use_relative_eh_frame
5519 #undef elf_backend_encode_eh_address
5520 #define elf_backend_encode_eh_address \
5521 bfinfdpic_elf_encode_eh_address
5523 #undef elf_backend_may_use_rel_p
5524 #define elf_backend_may_use_rel_p 1
5525 #undef elf_backend_may_use_rela_p
5526 #define elf_backend_may_use_rela_p 1
5527 /* We use REL for dynamic relocations only. */
5528 #undef elf_backend_default_use_rela_p
5529 #define elf_backend_default_use_rela_p 1
5531 #undef elf_backend_omit_section_dynsym
5532 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5534 #include "elf32-target.h"