1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright 2005, 2006 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 2 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, MA 02110-1301,
26 #include "elf/dwarf2.h"
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 PTR 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 fprintf(stderr
, "relocation should be even number\n");
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
== TRUE
)
334 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
336 if (howto
->pcrel_offset
== TRUE
)
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 fprintf(stderr
, "relocation should be even number\n");
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_unused0
, /* type. */
426 2, /* size (0 = byte, 1 = short, 2 = long). */
428 FALSE
, /* pc_relative. */
430 complain_overflow_bitfield
, /* complain_on_overflow. */
431 bfd_elf_generic_reloc
, /* special_function. */
432 "R_unused0", /* name. */
433 FALSE
, /* partial_inplace. */
436 FALSE
), /* pcrel_offset. */
438 HOWTO (R_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_pcrel5m2", /* name. */
447 FALSE
, /* partial_inplace. */
449 0x0000000F, /* dst_mask. */
450 FALSE
), /* pcrel_offset. */
452 HOWTO (R_unused1
, /* type. */
454 2, /* size (0 = byte, 1 = short, 2 = long). */
456 FALSE
, /* pc_relative. */
458 complain_overflow_bitfield
, /* complain_on_overflow. */
459 bfd_elf_generic_reloc
, /* special_function. */
460 "R_unused1", /* name. */
461 FALSE
, /* partial_inplace. */
464 FALSE
), /* pcrel_offset. */
466 HOWTO (R_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_pcrel10", /* name. */
475 FALSE
, /* partial_inplace. */
477 0x000003FF, /* dst_mask. */
478 TRUE
), /* pcrel_offset. */
480 HOWTO (R_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_pcrel12_jump", /* name. */
493 FALSE
, /* partial_inplace. */
495 0x0FFF, /* dst_mask. */
496 TRUE
), /* pcrel_offset. */
498 HOWTO (R_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_rimm16", /* name. */
507 FALSE
, /* partial_inplace. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE
), /* pcrel_offset. */
512 HOWTO (R_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_luimm16", /* name. */
521 FALSE
, /* partial_inplace. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE
), /* pcrel_offset. */
526 HOWTO (R_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_huimm16", /* name. */
535 FALSE
, /* partial_inplace. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE
), /* pcrel_offset. */
540 HOWTO (R_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_pcrel12_jump_s", /* name. */
549 FALSE
, /* partial_inplace. */
551 0x00000FFF, /* dst_mask. */
552 TRUE
), /* pcrel_offset. */
554 HOWTO (R_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_pcrel24_jump_x", /* name. */
563 FALSE
, /* partial_inplace. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE
), /* pcrel_offset. */
568 HOWTO (R_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_pcrel24", /* name. */
577 FALSE
, /* partial_inplace. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE
), /* pcrel_offset. */
582 HOWTO (R_unusedb
, /* type. */
584 2, /* 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_unusedb", /* name. */
591 FALSE
, /* partial_inplace. */
594 FALSE
), /* pcrel_offset. */
596 HOWTO (R_unusedc
, /* type. */
598 2, /* 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_unusedc", /* name. */
605 FALSE
, /* partial_inplace. */
608 FALSE
), /* pcrel_offset. */
610 HOWTO (R_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_pcrel24_jump_l", /* name. */
619 FALSE
, /* partial_inplace. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE
), /* pcrel_offset. */
624 HOWTO (R_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_pcrel24_call_x", /* name. */
633 FALSE
, /* partial_inplace. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE
), /* pcrel_offset. */
638 HOWTO (R_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_var_eq_symb", /* name. */
647 FALSE
, /* partial_inplace. */
650 FALSE
), /* pcrel_offset. */
652 HOWTO (R_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_byte_data", /* name. */
661 FALSE
, /* partial_inplace. */
663 0xFF, /* dst_mask. */
664 TRUE
), /* pcrel_offset. */
666 HOWTO (R_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_byte2_data", /* name. */
675 FALSE
, /* partial_inplace. */
677 0xFFFF, /* dst_mask. */
678 TRUE
), /* pcrel_offset. */
680 HOWTO (R_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_byte4_data", /* name. */
689 FALSE
, /* partial_inplace. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE
), /* pcrel_offset. */
694 HOWTO (R_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_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_GOT12", /* 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_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_pltpc", /* name. */
943 FALSE
, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE
), /* pcrel_offset. */
948 HOWTO (R_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. */
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_unused0
},
1002 { BFD_RELOC_BFIN_5_PCREL
, R_pcrel5m2
},
1003 { BFD_RELOC_NONE
, R_unused1
},
1004 { BFD_RELOC_BFIN_10_PCREL
, R_pcrel10
},
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP
, R_pcrel12_jump
},
1006 { BFD_RELOC_BFIN_16_IMM
, R_rimm16
},
1007 { BFD_RELOC_BFIN_16_LOW
, R_luimm16
},
1008 { BFD_RELOC_BFIN_16_HIGH
, R_huimm16
},
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S
, R_pcrel12_jump_s
},
1010 { BFD_RELOC_24_PCREL
, R_pcrel24
},
1011 { BFD_RELOC_24_PCREL
, R_pcrel24
},
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L
, R_pcrel24_jump_l
},
1013 { BFD_RELOC_NONE
, R_unusedb
},
1014 { BFD_RELOC_NONE
, R_unusedc
},
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X
, R_pcrel24_call_x
},
1016 { BFD_RELOC_8
, R_byte_data
},
1017 { BFD_RELOC_16
, R_byte2_data
},
1018 { BFD_RELOC_32
, R_byte4_data
},
1019 { BFD_RELOC_BFIN_11_PCREL
, R_pcrel11
},
1020 { BFD_RELOC_BFIN_GOT
, R_got
},
1021 { BFD_RELOC_BFIN_PLTPC
, R_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
= BFIN_RELOC_MIN
;
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
&& r_type
> BFIN_RELOC_MIN
)
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 /* Given a bfin relocation type, return the howto. */
1084 static reloc_howto_type
*
1085 bfin_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1086 unsigned int r_type
)
1088 if (r_type
<= BFIN_RELOC_MAX
)
1089 return &bfin_howto_table
[r_type
];
1091 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1092 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1094 return (reloc_howto_type
*) NULL
;
1098 /* Return TRUE if the name is a local label.
1099 bfin local labels begin with L$. */
1101 bfin_is_local_label_name (
1102 bfd
*abfd ATTRIBUTE_UNUSED
,
1105 if (label
[0] == 'L' && label
[1] == '$' )
1108 return _bfd_elf_is_local_label_name (abfd
, label
);
1111 extern const bfd_target bfd_elf32_bfinfdpic_vec
;
1112 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
1114 /* An extension of the elf hash table data structure, containing some
1115 additional Blackfin-specific data. */
1116 struct bfinfdpic_elf_link_hash_table
1118 struct elf_link_hash_table elf
;
1120 /* A pointer to the .got section. */
1122 /* A pointer to the .rel.got section. */
1124 /* A pointer to the .rofixup section. */
1125 asection
*sgotfixup
;
1126 /* A pointer to the .plt section. */
1128 /* A pointer to the .rel.plt section. */
1130 /* GOT base offset. */
1132 /* Location of the first non-lazy PLT entry, i.e., the number of
1133 bytes taken by lazy PLT entries. */
1135 /* A hash table holding information about which symbols were
1136 referenced with which PIC-related relocations. */
1137 struct htab
*relocs_info
;
1140 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1142 #define bfinfdpic_hash_table(info) \
1143 ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash))
1145 #define bfinfdpic_got_section(info) \
1146 (bfinfdpic_hash_table (info)->sgot)
1147 #define bfinfdpic_gotrel_section(info) \
1148 (bfinfdpic_hash_table (info)->sgotrel)
1149 #define bfinfdpic_gotfixup_section(info) \
1150 (bfinfdpic_hash_table (info)->sgotfixup)
1151 #define bfinfdpic_plt_section(info) \
1152 (bfinfdpic_hash_table (info)->splt)
1153 #define bfinfdpic_pltrel_section(info) \
1154 (bfinfdpic_hash_table (info)->spltrel)
1155 #define bfinfdpic_relocs_info(info) \
1156 (bfinfdpic_hash_table (info)->relocs_info)
1157 #define bfinfdpic_got_initial_offset(info) \
1158 (bfinfdpic_hash_table (info)->got0)
1159 #define bfinfdpic_plt_initial_offset(info) \
1160 (bfinfdpic_hash_table (info)->plt0)
1162 /* Create a Blackfin ELF linker hash table. */
1164 static struct bfd_link_hash_table
*
1165 bfinfdpic_elf_link_hash_table_create (bfd
*abfd
)
1167 struct bfinfdpic_elf_link_hash_table
*ret
;
1168 bfd_size_type amt
= sizeof (struct bfinfdpic_elf_link_hash_table
);
1170 ret
= bfd_zalloc (abfd
, amt
);
1174 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1175 _bfd_elf_link_hash_newfunc
,
1176 sizeof (struct elf_link_hash_entry
)))
1182 return &ret
->elf
.root
;
1185 /* Decide whether a reference to a symbol can be resolved locally or
1186 not. If the symbol is protected, we want the local address, but
1187 its function descriptor must be assigned by the dynamic linker. */
1188 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1189 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1190 || ! elf_hash_table (INFO)->dynamic_sections_created)
1191 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1192 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1194 /* This structure collects information on what kind of GOT, PLT or
1195 function descriptors are required by relocations that reference a
1197 struct bfinfdpic_relocs_info
1199 /* The index of the symbol, as stored in the relocation r_info, if
1200 we have a local symbol; -1 otherwise. */
1204 /* The input bfd in which the symbol is defined, if it's a local
1207 /* If symndx == -1, the hash table entry corresponding to a global
1208 symbol (even if it turns out to bind locally, in which case it
1209 should ideally be replaced with section's symndx + addend). */
1210 struct elf_link_hash_entry
*h
;
1212 /* The addend of the relocation that references the symbol. */
1215 /* The fields above are used to identify an entry. The fields below
1216 contain information on how an entry is used and, later on, which
1217 locations it was assigned. */
1218 /* The following 2 fields record whether the symbol+addend above was
1219 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1220 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1223 /* Whether a FUNCDESC relocation references symbol+addend. */
1225 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1226 unsigned fdgot17m4
:1;
1227 unsigned fdgothilo
:1;
1228 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1229 unsigned fdgoff17m4
:1;
1230 unsigned fdgoffhilo
:1;
1231 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1232 GOTOFFHI relocations. The addend doesn't really matter, since we
1233 envision that this will only be used to check whether the symbol
1234 is mapped to the same segment as the got. */
1236 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1238 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1241 /* Whether we need a PLT entry for a symbol. Should be implied by
1243 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1245 /* Whether a function descriptor should be created in this link unit
1246 for symbol+addend. Should be implied by something like:
1247 (plt || fdgotoff17m4 || fdgotofflohi
1248 || ((fd || fdgot17m4 || fdgothilo)
1249 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1251 /* Whether a lazy PLT entry is needed for this symbol+addend.
1252 Should be implied by something like:
1253 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1254 && ! (info->flags & DF_BIND_NOW)) */
1256 /* Whether we've already emitted GOT relocations and PLT entries as
1257 needed for this symbol. */
1260 /* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1261 relocations referencing the symbol. */
1262 unsigned relocs32
, relocsfd
, relocsfdv
;
1264 /* The number of .rofixups entries and dynamic relocations allocated
1265 for this symbol, minus any that might have already been used. */
1266 unsigned fixups
, dynrelocs
;
1268 /* The offsets of the GOT entries assigned to symbol+addend, to the
1269 function descriptor's address, and to a function descriptor,
1270 respectively. Should be zero if unassigned. The offsets are
1271 counted from the value that will be assigned to the PIC register,
1272 not from the beginning of the .got section. */
1273 bfd_signed_vma got_entry
, fdgot_entry
, fd_entry
;
1274 /* The offsets of the PLT entries assigned to symbol+addend,
1275 non-lazy and lazy, respectively. If unassigned, should be
1277 bfd_vma plt_entry
, lzplt_entry
;
1280 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1282 bfinfdpic_relocs_info_hash (const void *entry_
)
1284 const struct bfinfdpic_relocs_info
*entry
= entry_
;
1286 return (entry
->symndx
== -1
1287 ? (long) entry
->d
.h
->root
.root
.hash
1288 : entry
->symndx
+ (long) entry
->d
.abfd
->id
* 257) + entry
->addend
;
1291 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1294 bfinfdpic_relocs_info_eq (const void *entry1
, const void *entry2
)
1296 const struct bfinfdpic_relocs_info
*e1
= entry1
;
1297 const struct bfinfdpic_relocs_info
*e2
= entry2
;
1299 return e1
->symndx
== e2
->symndx
&& e1
->addend
== e2
->addend
1300 && (e1
->symndx
== -1 ? e1
->d
.h
== e2
->d
.h
: e1
->d
.abfd
== e2
->d
.abfd
);
1303 /* Find or create an entry in a hash table HT that matches the key
1304 fields of the given ENTRY. If it's not found, memory for a new
1305 entry is allocated in ABFD's obstack. */
1306 static struct bfinfdpic_relocs_info
*
1307 bfinfdpic_relocs_info_find (struct htab
*ht
,
1309 const struct bfinfdpic_relocs_info
*entry
,
1310 enum insert_option insert
)
1312 struct bfinfdpic_relocs_info
**loc
=
1313 (struct bfinfdpic_relocs_info
**) htab_find_slot (ht
, entry
, insert
);
1321 *loc
= bfd_zalloc (abfd
, sizeof (**loc
));
1326 (*loc
)->symndx
= entry
->symndx
;
1327 (*loc
)->d
= entry
->d
;
1328 (*loc
)->addend
= entry
->addend
;
1329 (*loc
)->plt_entry
= (bfd_vma
)-1;
1330 (*loc
)->lzplt_entry
= (bfd_vma
)-1;
1335 /* Obtain the address of the entry in HT associated with H's symbol +
1336 addend, creating a new entry if none existed. ABFD is only used
1337 for memory allocation purposes. */
1338 inline static struct bfinfdpic_relocs_info
*
1339 bfinfdpic_relocs_info_for_global (struct htab
*ht
,
1341 struct elf_link_hash_entry
*h
,
1343 enum insert_option insert
)
1345 struct bfinfdpic_relocs_info entry
;
1349 entry
.addend
= addend
;
1351 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1354 /* Obtain the address of the entry in HT associated with the SYMNDXth
1355 local symbol of the input bfd ABFD, plus the addend, creating a new
1356 entry if none existed. */
1357 inline static struct bfinfdpic_relocs_info
*
1358 bfinfdpic_relocs_info_for_local (struct htab
*ht
,
1362 enum insert_option insert
)
1364 struct bfinfdpic_relocs_info entry
;
1366 entry
.symndx
= symndx
;
1367 entry
.d
.abfd
= abfd
;
1368 entry
.addend
= addend
;
1370 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1373 /* Merge fields set by check_relocs() of two entries that end up being
1374 mapped to the same (presumably global) symbol. */
1377 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info
*e2
,
1378 struct bfinfdpic_relocs_info
const *e1
)
1380 e2
->got17m4
|= e1
->got17m4
;
1381 e2
->gothilo
|= e1
->gothilo
;
1383 e2
->fdgot17m4
|= e1
->fdgot17m4
;
1384 e2
->fdgothilo
|= e1
->fdgothilo
;
1385 e2
->fdgoff17m4
|= e1
->fdgoff17m4
;
1386 e2
->fdgoffhilo
|= e1
->fdgoffhilo
;
1387 e2
->gotoff
|= e1
->gotoff
;
1388 e2
->call
|= e1
->call
;
1392 /* Every block of 65535 lazy PLT entries shares a single call to the
1393 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1394 32767, counting from 0). All other lazy PLT entries branch to it
1395 in a single instruction. */
1397 #define LZPLT_RESOLVER_EXTRA 10
1398 #define LZPLT_NORMAL_SIZE 6
1399 #define LZPLT_ENTRIES 1362
1401 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1402 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1404 /* Add a dynamic relocation to the SRELOC section. */
1406 inline static bfd_vma
1407 _bfinfdpic_add_dyn_reloc (bfd
*output_bfd
, asection
*sreloc
, bfd_vma offset
,
1408 int reloc_type
, long dynindx
, bfd_vma addend
,
1409 struct bfinfdpic_relocs_info
*entry
)
1411 Elf_Internal_Rela outrel
;
1412 bfd_vma reloc_offset
;
1414 outrel
.r_offset
= offset
;
1415 outrel
.r_info
= ELF32_R_INFO (dynindx
, reloc_type
);
1416 outrel
.r_addend
= addend
;
1418 reloc_offset
= sreloc
->reloc_count
* sizeof (Elf32_External_Rel
);
1419 BFD_ASSERT (reloc_offset
< sreloc
->size
);
1420 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1421 sreloc
->contents
+ reloc_offset
);
1422 sreloc
->reloc_count
++;
1424 /* If the entry's index is zero, this relocation was probably to a
1425 linkonce section that got discarded. We reserved a dynamic
1426 relocation, but it was for another entry than the one we got at
1427 the time of emitting the relocation. Unfortunately there's no
1428 simple way for us to catch this situation, since the relocation
1429 is cleared right before calling relocate_section, at which point
1430 we no longer know what the relocation used to point to. */
1433 BFD_ASSERT (entry
->dynrelocs
> 0);
1437 return reloc_offset
;
1440 /* Add a fixup to the ROFIXUP section. */
1443 _bfinfdpic_add_rofixup (bfd
*output_bfd
, asection
*rofixup
, bfd_vma offset
,
1444 struct bfinfdpic_relocs_info
*entry
)
1446 bfd_vma fixup_offset
;
1448 if (rofixup
->flags
& SEC_EXCLUDE
)
1451 fixup_offset
= rofixup
->reloc_count
* 4;
1452 if (rofixup
->contents
)
1454 BFD_ASSERT (fixup_offset
< rofixup
->size
);
1455 bfd_put_32 (output_bfd
, offset
, rofixup
->contents
+ fixup_offset
);
1457 rofixup
->reloc_count
++;
1459 if (entry
&& entry
->symndx
)
1461 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
1463 BFD_ASSERT (entry
->fixups
> 0);
1467 return fixup_offset
;
1470 /* Find the segment number in which OSEC, and output section, is
1474 _bfinfdpic_osec_to_segment (bfd
*output_bfd
, asection
*osec
)
1476 struct elf_segment_map
*m
;
1477 Elf_Internal_Phdr
*p
;
1479 /* Find the segment that contains the output_section. */
1480 for (m
= elf_tdata (output_bfd
)->segment_map
,
1481 p
= elf_tdata (output_bfd
)->phdr
;
1487 for (i
= m
->count
- 1; i
>= 0; i
--)
1488 if (m
->sections
[i
] == osec
)
1495 return p
- elf_tdata (output_bfd
)->phdr
;
1498 inline static bfd_boolean
1499 _bfinfdpic_osec_readonly_p (bfd
*output_bfd
, asection
*osec
)
1501 unsigned seg
= _bfinfdpic_osec_to_segment (output_bfd
, osec
);
1503 return ! (elf_tdata (output_bfd
)->phdr
[seg
].p_flags
& PF_W
);
1506 /* Generate relocations for GOT entries, function descriptors, and
1507 code for PLT and lazy PLT entries. */
1509 inline static bfd_boolean
1510 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info
*entry
,
1512 struct bfd_link_info
*info
,
1514 Elf_Internal_Sym
*sym
,
1518 bfd_vma fd_lazy_rel_offset
= (bfd_vma
)-1;
1525 if (entry
->got_entry
|| entry
->fdgot_entry
|| entry
->fd_entry
)
1527 /* If the symbol is dynamic, consider it for dynamic
1528 relocations, otherwise decay to section + offset. */
1529 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1)
1530 dynindx
= entry
->d
.h
->dynindx
;
1533 if (sec
->output_section
1534 && ! bfd_is_abs_section (sec
->output_section
)
1535 && ! bfd_is_und_section (sec
->output_section
))
1536 dynindx
= elf_section_data (sec
->output_section
)->dynindx
;
1542 /* Generate relocation for GOT entry pointing to the symbol. */
1543 if (entry
->got_entry
)
1546 bfd_vma ad
= addend
;
1548 /* If the symbol is dynamic but binds locally, use
1550 if (sec
&& (entry
->symndx
!= -1
1551 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1553 if (entry
->symndx
== -1)
1554 ad
+= entry
->d
.h
->root
.u
.def
.value
;
1556 ad
+= sym
->st_value
;
1557 ad
+= sec
->output_offset
;
1558 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
1559 idx
= elf_section_data (sec
->output_section
)->dynindx
;
1564 /* If we're linking an executable at a fixed address, we can
1565 omit the dynamic relocation as long as the symbol is local to
1567 if (info
->executable
&& !info
->pie
1568 && (entry
->symndx
!= -1
1569 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1572 ad
+= sec
->output_section
->vma
;
1573 if (entry
->symndx
!= -1
1574 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
1575 _bfinfdpic_add_rofixup (output_bfd
,
1576 bfinfdpic_gotfixup_section (info
),
1577 bfinfdpic_got_section (info
)->output_section
1579 + bfinfdpic_got_section (info
)->output_offset
1580 + bfinfdpic_got_initial_offset (info
)
1581 + entry
->got_entry
, entry
);
1584 _bfinfdpic_add_dyn_reloc (output_bfd
, bfinfdpic_gotrel_section (info
),
1585 _bfd_elf_section_offset
1587 bfinfdpic_got_section (info
),
1588 bfinfdpic_got_initial_offset (info
)
1590 + bfinfdpic_got_section (info
)
1591 ->output_section
->vma
1592 + bfinfdpic_got_section (info
)->output_offset
,
1593 R_byte4_data
, idx
, ad
, entry
);
1595 bfd_put_32 (output_bfd
, ad
,
1596 bfinfdpic_got_section (info
)->contents
1597 + bfinfdpic_got_initial_offset (info
)
1598 + entry
->got_entry
);
1601 /* Generate relocation for GOT entry pointing to a canonical
1602 function descriptor. */
1603 if (entry
->fdgot_entry
)
1608 if (! (entry
->symndx
== -1
1609 && entry
->d
.h
->root
.type
== bfd_link_hash_undefweak
1610 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1612 /* If the symbol is dynamic and there may be dynamic symbol
1613 resolution because we are, or are linked with, a shared
1614 library, emit a FUNCDESC relocation such that the dynamic
1615 linker will allocate the function descriptor. If the
1616 symbol needs a non-local function descriptor but binds
1617 locally (e.g., its visibility is protected, emit a
1618 dynamic relocation decayed to section+offset. */
1619 if (entry
->symndx
== -1
1620 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)
1621 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)
1622 && !(info
->executable
&& !info
->pie
))
1624 reloc
= R_BFIN_FUNCDESC
;
1625 idx
= elf_section_data (entry
->d
.h
->root
.u
.def
.section
1626 ->output_section
)->dynindx
;
1627 ad
= entry
->d
.h
->root
.u
.def
.section
->output_offset
1628 + entry
->d
.h
->root
.u
.def
.value
;
1630 else if (entry
->symndx
== -1
1631 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
))
1633 reloc
= R_BFIN_FUNCDESC
;
1641 /* Otherwise, we know we have a private function descriptor,
1642 so reference it directly. */
1643 if (elf_hash_table (info
)->dynamic_sections_created
)
1644 BFD_ASSERT (entry
->privfd
);
1645 reloc
= R_byte4_data
;
1646 idx
= elf_section_data (bfinfdpic_got_section (info
)
1647 ->output_section
)->dynindx
;
1648 ad
= bfinfdpic_got_section (info
)->output_offset
1649 + bfinfdpic_got_initial_offset (info
) + entry
->fd_entry
;
1652 /* If there is room for dynamic symbol resolution, emit the
1653 dynamic relocation. However, if we're linking an
1654 executable at a fixed location, we won't have emitted a
1655 dynamic symbol entry for the got section, so idx will be
1656 zero, which means we can and should compute the address
1657 of the private descriptor ourselves. */
1658 if (info
->executable
&& !info
->pie
1659 && (entry
->symndx
!= -1
1660 || BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)))
1662 ad
+= bfinfdpic_got_section (info
)->output_section
->vma
;
1663 _bfinfdpic_add_rofixup (output_bfd
,
1664 bfinfdpic_gotfixup_section (info
),
1665 bfinfdpic_got_section (info
)
1666 ->output_section
->vma
1667 + bfinfdpic_got_section (info
)
1669 + bfinfdpic_got_initial_offset (info
)
1670 + entry
->fdgot_entry
, entry
);
1673 _bfinfdpic_add_dyn_reloc (output_bfd
,
1674 bfinfdpic_gotrel_section (info
),
1675 _bfd_elf_section_offset
1677 bfinfdpic_got_section (info
),
1678 bfinfdpic_got_initial_offset (info
)
1679 + entry
->fdgot_entry
)
1680 + bfinfdpic_got_section (info
)
1681 ->output_section
->vma
1682 + bfinfdpic_got_section (info
)
1684 reloc
, idx
, ad
, entry
);
1687 bfd_put_32 (output_bfd
, ad
,
1688 bfinfdpic_got_section (info
)->contents
1689 + bfinfdpic_got_initial_offset (info
)
1690 + entry
->fdgot_entry
);
1693 /* Generate relocation to fill in a private function descriptor in
1695 if (entry
->fd_entry
)
1698 bfd_vma ad
= addend
;
1700 long lowword
, highword
;
1702 /* If the symbol is dynamic but binds locally, use
1704 if (sec
&& (entry
->symndx
!= -1
1705 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1707 if (entry
->symndx
== -1)
1708 ad
+= entry
->d
.h
->root
.u
.def
.value
;
1710 ad
+= sym
->st_value
;
1711 ad
+= sec
->output_offset
;
1712 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
1713 idx
= elf_section_data (sec
->output_section
)->dynindx
;
1718 /* If we're linking an executable at a fixed address, we can
1719 omit the dynamic relocation as long as the symbol is local to
1721 if (info
->executable
&& !info
->pie
1722 && (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1725 ad
+= sec
->output_section
->vma
;
1727 if (entry
->symndx
!= -1
1728 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
1730 _bfinfdpic_add_rofixup (output_bfd
,
1731 bfinfdpic_gotfixup_section (info
),
1732 bfinfdpic_got_section (info
)
1733 ->output_section
->vma
1734 + bfinfdpic_got_section (info
)
1736 + bfinfdpic_got_initial_offset (info
)
1737 + entry
->fd_entry
, entry
);
1738 _bfinfdpic_add_rofixup (output_bfd
,
1739 bfinfdpic_gotfixup_section (info
),
1740 bfinfdpic_got_section (info
)
1741 ->output_section
->vma
1742 + bfinfdpic_got_section (info
)
1744 + bfinfdpic_got_initial_offset (info
)
1745 + entry
->fd_entry
+ 4, entry
);
1751 = _bfinfdpic_add_dyn_reloc (output_bfd
,
1753 ? bfinfdpic_pltrel_section (info
)
1754 : bfinfdpic_gotrel_section (info
),
1755 _bfd_elf_section_offset
1757 bfinfdpic_got_section (info
),
1758 bfinfdpic_got_initial_offset (info
)
1760 + bfinfdpic_got_section (info
)
1761 ->output_section
->vma
1762 + bfinfdpic_got_section (info
)
1764 R_BFIN_FUNCDESC_VALUE
, idx
, ad
, entry
);
1767 /* If we've omitted the dynamic relocation, just emit the fixed
1768 addresses of the symbol and of the local GOT base offset. */
1769 if (info
->executable
&& !info
->pie
&& sec
&& sec
->output_section
)
1772 highword
= bfinfdpic_got_section (info
)->output_section
->vma
1773 + bfinfdpic_got_section (info
)->output_offset
1774 + bfinfdpic_got_initial_offset (info
);
1776 else if (entry
->lazyplt
)
1781 fd_lazy_rel_offset
= ofst
;
1783 /* A function descriptor used for lazy or local resolving is
1784 initialized such that its high word contains the output
1785 section index in which the PLT entries are located, and
1786 the low word contains the address of the lazy PLT entry
1787 entry point, that must be within the memory region
1788 assigned to that section. */
1789 lowword
= entry
->lzplt_entry
+ 4
1790 + bfinfdpic_plt_section (info
)->output_offset
1791 + bfinfdpic_plt_section (info
)->output_section
->vma
;
1792 highword
= _bfinfdpic_osec_to_segment
1793 (output_bfd
, bfinfdpic_plt_section (info
)->output_section
);
1797 /* A function descriptor for a local function gets the index
1798 of the section. For a non-local function, it's
1801 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1
1802 && entry
->d
.h
->dynindx
== idx
)
1805 highword
= _bfinfdpic_osec_to_segment
1806 (output_bfd
, sec
->output_section
);
1809 bfd_put_32 (output_bfd
, lowword
,
1810 bfinfdpic_got_section (info
)->contents
1811 + bfinfdpic_got_initial_offset (info
)
1813 bfd_put_32 (output_bfd
, highword
,
1814 bfinfdpic_got_section (info
)->contents
1815 + bfinfdpic_got_initial_offset (info
)
1816 + entry
->fd_entry
+ 4);
1819 /* Generate code for the PLT entry. */
1820 if (entry
->plt_entry
!= (bfd_vma
) -1)
1822 bfd_byte
*plt_code
= bfinfdpic_plt_section (info
)->contents
1825 BFD_ASSERT (entry
->fd_entry
);
1827 /* Figure out what kind of PLT entry we need, depending on the
1828 location of the function descriptor within the GOT. */
1829 if (entry
->fd_entry
>= -(1 << (18 - 1))
1830 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
1832 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
1833 bfd_put_32 (output_bfd
,
1834 0xe519 | ((entry
->fd_entry
<< 14) & 0xFFFF0000),
1836 bfd_put_32 (output_bfd
,
1837 0xe51b | (((entry
->fd_entry
+ 4) << 14) & 0xFFFF0000),
1843 /* P1.L = fd_entry; P1.H = fd_entry;
1847 bfd_put_32 (output_bfd
,
1848 0xe109 | (entry
->fd_entry
<< 16),
1850 bfd_put_32 (output_bfd
,
1851 0xe149 | (entry
->fd_entry
& 0xFFFF0000),
1853 bfd_put_16 (output_bfd
, 0x5ad9, plt_code
+ 8);
1854 bfd_put_16 (output_bfd
, 0x9159, plt_code
+ 10);
1855 bfd_put_16 (output_bfd
, 0xac5b, plt_code
+ 12);
1859 bfd_put_16 (output_bfd
, 0x0051, plt_code
);
1862 /* Generate code for the lazy PLT entry. */
1863 if (entry
->lzplt_entry
!= (bfd_vma
) -1)
1865 bfd_byte
*lzplt_code
= bfinfdpic_plt_section (info
)->contents
1866 + entry
->lzplt_entry
;
1867 bfd_vma resolverStub_addr
;
1869 bfd_put_32 (output_bfd
, fd_lazy_rel_offset
, lzplt_code
);
1872 resolverStub_addr
= entry
->lzplt_entry
/ BFINFDPIC_LZPLT_BLOCK_SIZE
1873 * BFINFDPIC_LZPLT_BLOCK_SIZE
+ BFINFDPIC_LZPLT_RESOLV_LOC
;
1874 if (resolverStub_addr
>= bfinfdpic_plt_initial_offset (info
))
1875 resolverStub_addr
= bfinfdpic_plt_initial_offset (info
) - LZPLT_NORMAL_SIZE
- LZPLT_RESOLVER_EXTRA
;
1877 if (entry
->lzplt_entry
== resolverStub_addr
)
1879 /* This is a lazy PLT entry that includes a resolver call.
1883 bfd_put_32 (output_bfd
,
1886 bfd_put_16 (output_bfd
, 0x0052, lzplt_code
+ 4);
1890 /* JUMP.S resolverStub */
1891 bfd_put_16 (output_bfd
,
1893 | (((resolverStub_addr
- entry
->lzplt_entry
)
1894 / 2) & (((bfd_vma
)1 << 12) - 1)),
1903 /* Look through the relocs for a section during the first phase, and
1904 allocate space in the global offset table or procedure linkage
1908 bfin_check_relocs (bfd
* abfd
,
1909 struct bfd_link_info
*info
,
1911 const Elf_Internal_Rela
*relocs
)
1914 Elf_Internal_Shdr
*symtab_hdr
;
1915 struct elf_link_hash_entry
**sym_hashes
;
1916 bfd_signed_vma
*local_got_refcounts
;
1917 const Elf_Internal_Rela
*rel
;
1918 const Elf_Internal_Rela
*rel_end
;
1922 if (info
->relocatable
)
1925 dynobj
= elf_hash_table (info
)->dynobj
;
1926 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1927 sym_hashes
= elf_sym_hashes (abfd
);
1928 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1934 rel_end
= relocs
+ sec
->reloc_count
;
1935 for (rel
= relocs
; rel
< rel_end
; rel
++)
1937 unsigned long r_symndx
;
1938 struct elf_link_hash_entry
*h
;
1940 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1941 if (r_symndx
< symtab_hdr
->sh_info
)
1944 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1946 switch (ELF32_R_TYPE (rel
->r_info
))
1948 /* This relocation describes the C++ object vtable hierarchy.
1949 Reconstruct it for later use during GC. */
1950 case R_BFIN_GNU_VTINHERIT
:
1951 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1955 /* This relocation describes which C++ vtable entries
1956 are actually used. Record for later use during GC. */
1957 case R_BFIN_GNU_VTENTRY
:
1958 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1964 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1970 /* Create the .got section. */
1971 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1972 if (!_bfd_elf_create_got_section (dynobj
, info
))
1978 sgot
= bfd_get_section_by_name (dynobj
, ".got");
1979 BFD_ASSERT (sgot
!= NULL
);
1982 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
1984 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
1985 if (srelgot
== NULL
)
1987 srelgot
= bfd_make_section (dynobj
, ".rela.got");
1989 || !bfd_set_section_flags (dynobj
, srelgot
,
1994 | SEC_LINKER_CREATED
1996 || !bfd_set_section_alignment (dynobj
, srelgot
, 2))
2003 if (h
->got
.refcount
== 0)
2005 /* Make sure this symbol is output as a dynamic symbol. */
2006 if (h
->dynindx
== -1 && !h
->forced_local
)
2008 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
2012 /* Allocate space in the .got section. */
2014 /* Allocate relocation space. */
2015 srelgot
->size
+= sizeof (Elf32_External_Rela
);
2021 /* This is a global offset table entry for a local symbol. */
2022 if (local_got_refcounts
== NULL
)
2026 size
= symtab_hdr
->sh_info
;
2027 size
*= sizeof (bfd_signed_vma
);
2028 local_got_refcounts
= ((bfd_signed_vma
*)
2029 bfd_zalloc (abfd
, size
));
2030 if (local_got_refcounts
== NULL
)
2032 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2034 if (local_got_refcounts
[r_symndx
] == 0)
2039 /* If we are generating a shared object, we need to
2040 output a R_68K_RELATIVE reloc so that the dynamic
2041 linker can adjust this GOT entry. */
2042 srelgot
->size
+= sizeof (Elf32_External_Rela
);
2045 local_got_refcounts
[r_symndx
]++;
2057 static enum elf_reloc_type_class
2058 elf32_bfin_reloc_type_class (const Elf_Internal_Rela
* rela
)
2060 switch ((int) ELF32_R_TYPE (rela
->r_info
))
2063 return reloc_class_normal
;
2067 /* Relocate an Blackfin ELF section.
2069 The RELOCATE_SECTION function is called by the new ELF backend linker
2070 to handle the relocations for a section.
2072 The relocs are always passed as Rela structures; if the section
2073 actually uses Rel structures, the r_addend field will always be
2076 This function is responsible for adjusting the section contents as
2077 necessary, and (if using Rela relocs and generating a relocatable
2078 output file) adjusting the reloc addend as necessary.
2080 This function does not have to worry about setting the reloc
2081 address or the reloc symbol index.
2083 LOCAL_SYMS is a pointer to the swapped in local symbols.
2085 LOCAL_SECTIONS is an array giving the section in the input file
2086 corresponding to the st_shndx field of each local symbol.
2088 The global hash table entry for the global symbols can be found
2089 via elf_sym_hashes (input_bfd).
2091 When generating relocatable output, this function must handle
2092 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2093 going to be the section symbol corresponding to the output
2094 section, which means that the addend must be adjusted
2098 bfinfdpic_relocate_section (bfd
* output_bfd
,
2099 struct bfd_link_info
*info
,
2101 asection
* input_section
,
2102 bfd_byte
* contents
,
2103 Elf_Internal_Rela
* relocs
,
2104 Elf_Internal_Sym
* local_syms
,
2105 asection
** local_sections
)
2107 Elf_Internal_Shdr
*symtab_hdr
;
2108 struct elf_link_hash_entry
**sym_hashes
;
2109 Elf_Internal_Rela
*rel
;
2110 Elf_Internal_Rela
*relend
;
2111 unsigned isec_segment
, got_segment
, plt_segment
,
2113 int silence_segment_error
= !(info
->shared
|| info
->pie
);
2115 if (info
->relocatable
)
2118 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
2119 sym_hashes
= elf_sym_hashes (input_bfd
);
2120 relend
= relocs
+ input_section
->reloc_count
;
2122 isec_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2123 input_section
->output_section
);
2124 if (IS_FDPIC (output_bfd
) && bfinfdpic_got_section (info
))
2125 got_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2126 bfinfdpic_got_section (info
)
2130 if (IS_FDPIC (output_bfd
) && elf_hash_table (info
)->dynamic_sections_created
)
2131 plt_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2132 bfinfdpic_plt_section (info
)
2137 for (rel
= relocs
; rel
< relend
; rel
++)
2139 reloc_howto_type
*howto
;
2140 unsigned long r_symndx
;
2141 Elf_Internal_Sym
*sym
;
2143 struct elf_link_hash_entry
*h
;
2145 bfd_reloc_status_type r
;
2146 const char * name
= NULL
;
2149 struct bfinfdpic_relocs_info
*picrel
;
2150 bfd_vma orig_addend
= rel
->r_addend
;
2152 r_type
= ELF32_R_TYPE (rel
->r_info
);
2154 if (r_type
== R_BFIN_GNU_VTINHERIT
2155 || r_type
== R_BFIN_GNU_VTENTRY
)
2158 /* This is a final link. */
2159 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2160 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2163 bfd_set_error (bfd_error_bad_value
);
2171 if (r_symndx
< symtab_hdr
->sh_info
)
2173 sym
= local_syms
+ r_symndx
;
2174 osec
= sec
= local_sections
[r_symndx
];
2175 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2177 name
= bfd_elf_string_from_elf_section
2178 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
2179 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
2183 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2185 while (h
->root
.type
== bfd_link_hash_indirect
2186 || h
->root
.type
== bfd_link_hash_warning
)
2187 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2189 name
= h
->root
.root
.string
;
2191 if ((h
->root
.type
== bfd_link_hash_defined
2192 || h
->root
.type
== bfd_link_hash_defweak
)
2193 && ! BFINFDPIC_SYM_LOCAL (info
, h
))
2199 if (h
->root
.type
== bfd_link_hash_defined
2200 || h
->root
.type
== bfd_link_hash_defweak
)
2202 sec
= h
->root
.u
.def
.section
;
2203 relocation
= (h
->root
.u
.def
.value
2204 + sec
->output_section
->vma
2205 + sec
->output_offset
);
2207 else if (h
->root
.type
== bfd_link_hash_undefweak
)
2211 else if (info
->unresolved_syms_in_objects
== RM_IGNORE
2212 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
2216 if (! ((*info
->callbacks
->undefined_symbol
)
2217 (info
, h
->root
.root
.string
, input_bfd
,
2218 input_section
, rel
->r_offset
,
2219 (info
->unresolved_syms_in_objects
== RM_GENERATE_ERROR
2220 || ELF_ST_VISIBILITY (h
->other
)))))
2230 case R_pcrel24_jump_l
:
2232 if (! IS_FDPIC (output_bfd
))
2235 case R_BFIN_GOT17M4
:
2238 case R_BFIN_FUNCDESC_GOT17M4
:
2239 case R_BFIN_FUNCDESC_GOTHI
:
2240 case R_BFIN_FUNCDESC_GOTLO
:
2241 case R_BFIN_GOTOFF17M4
:
2242 case R_BFIN_GOTOFFHI
:
2243 case R_BFIN_GOTOFFLO
:
2244 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2245 case R_BFIN_FUNCDESC_GOTOFFHI
:
2246 case R_BFIN_FUNCDESC_GOTOFFLO
:
2247 case R_BFIN_FUNCDESC
:
2248 case R_BFIN_FUNCDESC_VALUE
:
2250 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2251 (info
), input_bfd
, h
,
2252 orig_addend
, INSERT
);
2254 /* In order to find the entry we created before, we must
2255 use the original addend, not the one that may have been
2256 modified by _bfd_elf_rela_local_sym(). */
2257 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2258 (info
), input_bfd
, r_symndx
,
2259 orig_addend
, INSERT
);
2263 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel
, output_bfd
, info
,
2267 (*_bfd_error_handler
)
2268 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2269 input_bfd
, input_section
, rel
->r_offset
, name
);
2279 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2281 info
->callbacks
->warning
2282 (info
, _("relocation references symbol not defined in the module"),
2283 name
, input_bfd
, input_section
, rel
->r_offset
);
2292 case R_pcrel24_jump_l
:
2293 check_segment
[0] = isec_segment
;
2294 if (! IS_FDPIC (output_bfd
))
2295 check_segment
[1] = isec_segment
;
2296 else if (picrel
->plt
)
2298 relocation
= bfinfdpic_plt_section (info
)->output_section
->vma
2299 + bfinfdpic_plt_section (info
)->output_offset
2300 + picrel
->plt_entry
;
2301 check_segment
[1] = plt_segment
;
2303 /* We don't want to warn on calls to undefined weak symbols,
2304 as calls to them must be protected by non-NULL tests
2305 anyway, and unprotected calls would invoke undefined
2307 else if (picrel
->symndx
== -1
2308 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefweak
)
2309 check_segment
[1] = check_segment
[0];
2311 check_segment
[1] = sec
2312 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2316 case R_BFIN_GOT17M4
:
2319 relocation
= picrel
->got_entry
;
2320 check_segment
[0] = check_segment
[1] = got_segment
;
2323 case R_BFIN_FUNCDESC_GOT17M4
:
2324 case R_BFIN_FUNCDESC_GOTHI
:
2325 case R_BFIN_FUNCDESC_GOTLO
:
2326 relocation
= picrel
->fdgot_entry
;
2327 check_segment
[0] = check_segment
[1] = got_segment
;
2330 case R_BFIN_GOTOFFHI
:
2331 case R_BFIN_GOTOFF17M4
:
2332 case R_BFIN_GOTOFFLO
:
2333 relocation
-= bfinfdpic_got_section (info
)->output_section
->vma
2334 + bfinfdpic_got_section (info
)->output_offset
2335 + bfinfdpic_got_initial_offset (info
);
2336 check_segment
[0] = got_segment
;
2337 check_segment
[1] = sec
2338 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2342 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2343 case R_BFIN_FUNCDESC_GOTOFFHI
:
2344 case R_BFIN_FUNCDESC_GOTOFFLO
:
2345 relocation
= picrel
->fd_entry
;
2346 check_segment
[0] = check_segment
[1] = got_segment
;
2349 case R_BFIN_FUNCDESC
:
2352 bfd_vma addend
= rel
->r_addend
;
2354 if (! (h
&& h
->root
.type
== bfd_link_hash_undefweak
2355 && BFINFDPIC_SYM_LOCAL (info
, h
)))
2357 /* If the symbol is dynamic and there may be dynamic
2358 symbol resolution because we are or are linked with a
2359 shared library, emit a FUNCDESC relocation such that
2360 the dynamic linker will allocate the function
2361 descriptor. If the symbol needs a non-local function
2362 descriptor but binds locally (e.g., its visibility is
2363 protected, emit a dynamic relocation decayed to
2365 if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
)
2366 && BFINFDPIC_SYM_LOCAL (info
, h
)
2367 && !(info
->executable
&& !info
->pie
))
2369 dynindx
= elf_section_data (h
->root
.u
.def
.section
2370 ->output_section
)->dynindx
;
2371 addend
+= h
->root
.u
.def
.section
->output_offset
2372 + h
->root
.u
.def
.value
;
2374 else if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
))
2378 info
->callbacks
->warning
2379 (info
, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2380 name
, input_bfd
, input_section
, rel
->r_offset
);
2383 dynindx
= h
->dynindx
;
2387 /* Otherwise, we know we have a private function
2388 descriptor, so reference it directly. */
2389 BFD_ASSERT (picrel
->privfd
);
2390 r_type
= R_byte4_data
;
2391 dynindx
= elf_section_data (bfinfdpic_got_section (info
)
2392 ->output_section
)->dynindx
;
2393 addend
= bfinfdpic_got_section (info
)->output_offset
2394 + bfinfdpic_got_initial_offset (info
)
2398 /* If there is room for dynamic symbol resolution, emit
2399 the dynamic relocation. However, if we're linking an
2400 executable at a fixed location, we won't have emitted a
2401 dynamic symbol entry for the got section, so idx will
2402 be zero, which means we can and should compute the
2403 address of the private descriptor ourselves. */
2404 if (info
->executable
&& !info
->pie
2405 && (!h
|| BFINFDPIC_FUNCDESC_LOCAL (info
, h
)))
2407 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2408 if ((bfd_get_section_flags (output_bfd
,
2409 input_section
->output_section
)
2410 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2412 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2416 info
->callbacks
->warning
2418 _("cannot emit fixups in read-only section"),
2419 name
, input_bfd
, input_section
, rel
->r_offset
);
2422 _bfinfdpic_add_rofixup (output_bfd
,
2423 bfinfdpic_gotfixup_section
2425 _bfd_elf_section_offset
2427 input_section
, rel
->r_offset
)
2429 ->output_section
->vma
2430 + input_section
->output_offset
,
2434 else if ((bfd_get_section_flags (output_bfd
,
2435 input_section
->output_section
)
2436 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2440 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2444 info
->callbacks
->warning
2446 _("cannot emit dynamic relocations in read-only section"),
2447 name
, input_bfd
, input_section
, rel
->r_offset
);
2450 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2451 input_section
, rel
->r_offset
);
2452 /* Only output a reloc for a not deleted entry. */
2453 if (offset
>= (bfd_vma
) -2)
2454 _bfinfdpic_add_dyn_reloc (output_bfd
,
2455 bfinfdpic_gotrel_section (info
),
2458 dynindx
, addend
, picrel
);
2460 _bfinfdpic_add_dyn_reloc (output_bfd
,
2461 bfinfdpic_gotrel_section (info
),
2462 offset
+ input_section
2463 ->output_section
->vma
2464 + input_section
->output_offset
,
2466 dynindx
, addend
, picrel
);
2469 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2472 /* We want the addend in-place because dynamic
2473 relocations are REL. Setting relocation to it should
2474 arrange for it to be installed. */
2475 relocation
= addend
- rel
->r_addend
;
2477 check_segment
[0] = check_segment
[1] = got_segment
;
2481 if (! IS_FDPIC (output_bfd
))
2483 check_segment
[0] = check_segment
[1] = -1;
2487 case R_BFIN_FUNCDESC_VALUE
:
2490 bfd_vma addend
= rel
->r_addend
;
2492 /* If the symbol is dynamic but binds locally, use
2494 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2496 if (addend
&& r_type
== R_BFIN_FUNCDESC_VALUE
)
2498 info
->callbacks
->warning
2499 (info
, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2500 name
, input_bfd
, input_section
, rel
->r_offset
);
2503 dynindx
= h
->dynindx
;
2508 addend
+= h
->root
.u
.def
.value
;
2510 addend
+= sym
->st_value
;
2512 addend
+= osec
->output_offset
;
2513 if (osec
&& osec
->output_section
2514 && ! bfd_is_abs_section (osec
->output_section
)
2515 && ! bfd_is_und_section (osec
->output_section
))
2516 dynindx
= elf_section_data (osec
->output_section
)->dynindx
;
2521 /* If we're linking an executable at a fixed address, we
2522 can omit the dynamic relocation as long as the symbol
2523 is defined in the current link unit (which is implied
2524 by its output section not being NULL). */
2525 if (info
->executable
&& !info
->pie
2526 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2529 addend
+= osec
->output_section
->vma
;
2530 if (IS_FDPIC (input_bfd
)
2531 && (bfd_get_section_flags (output_bfd
,
2532 input_section
->output_section
)
2533 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2535 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2539 info
->callbacks
->warning
2541 _("cannot emit fixups in read-only section"),
2542 name
, input_bfd
, input_section
, rel
->r_offset
);
2545 if (!h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2547 _bfinfdpic_add_rofixup (output_bfd
,
2548 bfinfdpic_gotfixup_section
2550 _bfd_elf_section_offset
2552 input_section
, rel
->r_offset
)
2554 ->output_section
->vma
2555 + input_section
->output_offset
,
2557 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2558 _bfinfdpic_add_rofixup
2560 bfinfdpic_gotfixup_section (info
),
2561 _bfd_elf_section_offset
2563 input_section
, rel
->r_offset
)
2564 + input_section
->output_section
->vma
2565 + input_section
->output_offset
+ 4, picrel
);
2571 if ((bfd_get_section_flags (output_bfd
,
2572 input_section
->output_section
)
2573 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2575 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2579 info
->callbacks
->warning
2581 _("cannot emit dynamic relocations in read-only section"),
2582 name
, input_bfd
, input_section
, rel
->r_offset
);
2585 _bfinfdpic_add_dyn_reloc (output_bfd
,
2586 bfinfdpic_gotrel_section (info
),
2587 _bfd_elf_section_offset
2589 input_section
, rel
->r_offset
)
2591 ->output_section
->vma
2592 + input_section
->output_offset
,
2593 r_type
, dynindx
, addend
, picrel
);
2596 addend
+= osec
->output_section
->vma
;
2597 /* We want the addend in-place because dynamic
2598 relocations are REL. Setting relocation to it
2599 should arrange for it to be installed. */
2600 relocation
= addend
- rel
->r_addend
;
2603 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2605 /* If we've omitted the dynamic relocation, just emit
2606 the fixed addresses of the symbol and of the local
2608 if (info
->executable
&& !info
->pie
2609 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2610 bfd_put_32 (output_bfd
,
2611 bfinfdpic_got_section (info
)->output_section
->vma
2612 + bfinfdpic_got_section (info
)->output_offset
2613 + bfinfdpic_got_initial_offset (info
),
2614 contents
+ rel
->r_offset
+ 4);
2616 /* A function descriptor used for lazy or local
2617 resolving is initialized such that its high word
2618 contains the output section index in which the
2619 PLT entries are located, and the low word
2620 contains the offset of the lazy PLT entry entry
2621 point into that section. */
2622 bfd_put_32 (output_bfd
,
2623 h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2625 : _bfinfdpic_osec_to_segment (output_bfd
,
2628 contents
+ rel
->r_offset
+ 4);
2631 check_segment
[0] = check_segment
[1] = got_segment
;
2635 check_segment
[0] = isec_segment
;
2636 check_segment
[1] = sec
2637 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2642 if (check_segment
[0] != check_segment
[1] && IS_FDPIC (output_bfd
))
2644 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
2645 in the ld testsuite. */
2646 /* This helps catch problems in GCC while we can't do more
2647 than static linking. The idea is to test whether the
2648 input file basename is crt0.o only once. */
2649 if (silence_segment_error
== 1)
2650 silence_segment_error
=
2651 (strlen (input_bfd
->filename
) == 6
2652 && strcmp (input_bfd
->filename
, "crt0.o") == 0)
2653 || (strlen (input_bfd
->filename
) > 6
2654 && strcmp (input_bfd
->filename
2655 + strlen (input_bfd
->filename
) - 7,
2659 if (!silence_segment_error
2660 /* We don't want duplicate errors for undefined
2662 && !(picrel
&& picrel
->symndx
== -1
2663 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefined
))
2664 info
->callbacks
->warning
2666 (info
->shared
|| info
->pie
)
2667 ? _("relocations between different segments are not supported")
2668 : _("warning: relocation references a different segment"),
2669 name
, input_bfd
, input_section
, rel
->r_offset
);
2670 if (!silence_segment_error
&& (info
->shared
|| info
->pie
))
2672 elf_elfheader (output_bfd
)->e_flags
|= EF_BFIN_PIC
;
2677 case R_BFIN_GOTOFFHI
:
2678 /* We need the addend to be applied before we shift the
2680 relocation
+= rel
->r_addend
;
2683 case R_BFIN_FUNCDESC_GOTHI
:
2684 case R_BFIN_FUNCDESC_GOTOFFHI
:
2689 case R_BFIN_FUNCDESC_GOTLO
:
2690 case R_BFIN_GOTOFFLO
:
2691 case R_BFIN_FUNCDESC_GOTOFFLO
:
2692 relocation
&= 0xffff;
2702 case R_pcrel24_jump_l
:
2703 if (! IS_FDPIC (output_bfd
) || ! picrel
->plt
)
2707 /* When referencing a GOT entry, a function descriptor or a
2708 PLT, we don't want the addend to apply to the reference,
2709 but rather to the referenced symbol. The actual entry
2710 will have already been created taking the addend into
2711 account, so cancel it out here. */
2712 case R_BFIN_GOT17M4
:
2715 case R_BFIN_FUNCDESC_GOT17M4
:
2716 case R_BFIN_FUNCDESC_GOTHI
:
2717 case R_BFIN_FUNCDESC_GOTLO
:
2718 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2719 case R_BFIN_FUNCDESC_GOTOFFHI
:
2720 case R_BFIN_FUNCDESC_GOTOFFLO
:
2721 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
2722 here, since we do want to apply the addend to the others.
2723 Note that we've applied the addend to GOTOFFHI before we
2724 shifted it right. */
2725 case R_BFIN_GOTOFFHI
:
2726 relocation
-= rel
->r_addend
;
2733 if (r_type
== R_pcrel24
2734 || r_type
== R_pcrel24_jump_l
)
2737 bfd_vma address
= rel
->r_offset
;
2739 relocation
+= rel
->r_addend
;
2741 /* Perform usual pc-relative correction. */
2742 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
2743 relocation
-= address
;
2745 /* We are getting reloc_entry->address 2 byte off from
2746 the start of instruction. Assuming absolute postion
2747 of the reloc data. But, following code had been written assuming
2748 reloc address is starting at begining of instruction.
2749 To compensate that I have increased the value of
2750 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
2757 x
= bfd_get_16 (input_bfd
, contents
+ address
);
2758 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
2759 bfd_put_16 (input_bfd
, x
, contents
+ address
);
2761 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
2762 x
= relocation
& 0xFFFF;
2763 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
2767 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2768 contents
, rel
->r_offset
,
2769 relocation
, rel
->r_addend
);
2771 if (r
!= bfd_reloc_ok
)
2773 const char * msg
= (const char *) NULL
;
2777 case bfd_reloc_overflow
:
2778 r
= info
->callbacks
->reloc_overflow
2779 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
2780 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
2783 case bfd_reloc_undefined
:
2784 r
= info
->callbacks
->undefined_symbol
2785 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
2788 case bfd_reloc_outofrange
:
2789 msg
= _("internal error: out of range error");
2792 case bfd_reloc_notsupported
:
2793 msg
= _("internal error: unsupported relocation error");
2796 case bfd_reloc_dangerous
:
2797 msg
= _("internal error: dangerous relocation");
2801 msg
= _("internal error: unknown error");
2806 r
= info
->callbacks
->warning
2807 (info
, msg
, name
, input_bfd
, input_section
, rel
->r_offset
);
2818 bfin_relocate_section (bfd
* output_bfd
,
2819 struct bfd_link_info
*info
,
2821 asection
* input_section
,
2822 bfd_byte
* contents
,
2823 Elf_Internal_Rela
* relocs
,
2824 Elf_Internal_Sym
* local_syms
,
2825 asection
** local_sections
)
2828 Elf_Internal_Shdr
*symtab_hdr
;
2829 struct elf_link_hash_entry
**sym_hashes
;
2830 bfd_vma
*local_got_offsets
;
2833 Elf_Internal_Rela
*rel
;
2834 Elf_Internal_Rela
*relend
;
2837 if (info
->relocatable
)
2840 dynobj
= elf_hash_table (info
)->dynobj
;
2841 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2842 sym_hashes
= elf_sym_hashes (input_bfd
);
2843 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2849 relend
= relocs
+ input_section
->reloc_count
;
2850 for (; rel
< relend
; rel
++, i
++)
2853 reloc_howto_type
*howto
;
2854 unsigned long r_symndx
;
2855 struct elf_link_hash_entry
*h
;
2856 Elf_Internal_Sym
*sym
;
2858 bfd_vma relocation
= 0;
2859 bfd_boolean unresolved_reloc
;
2860 bfd_reloc_status_type r
;
2863 r_type
= ELF32_R_TYPE (rel
->r_info
);
2864 if (r_type
< 0 || r_type
>= 243)
2866 bfd_set_error (bfd_error_bad_value
);
2870 if (r_type
== R_BFIN_GNU_VTENTRY
2871 || r_type
== R_BFIN_GNU_VTINHERIT
)
2874 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2877 bfd_set_error (bfd_error_bad_value
);
2880 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2885 unresolved_reloc
= FALSE
;
2887 if (r_symndx
< symtab_hdr
->sh_info
)
2889 sym
= local_syms
+ r_symndx
;
2890 sec
= local_sections
[r_symndx
];
2891 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2897 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2898 r_symndx
, symtab_hdr
, sym_hashes
,
2900 unresolved_reloc
, warned
);
2903 address
= rel
->r_offset
;
2905 /* Then, process normally. */
2908 case R_BFIN_GNU_VTINHERIT
:
2909 case R_BFIN_GNU_VTENTRY
:
2910 return bfd_reloc_ok
;
2913 /* Relocation is to the address of the entry for this symbol
2914 in the global offset table. */
2916 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
2919 /* Relocation is the offset of the entry for this symbol in
2920 the global offset table. */
2927 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2928 BFD_ASSERT (sgot
!= NULL
);
2935 off
= h
->got
.offset
;
2936 BFD_ASSERT (off
!= (bfd_vma
) - 1);
2937 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
2939 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2946 /* This is actually a static link, or it is a
2947 -Bsymbolic link and the symbol is defined
2948 locally, or the symbol was forced to be local
2949 because of a version file.. We must initialize
2950 this entry in the global offset table. Since
2951 the offset must always be a multiple of 4, we
2952 use the least significant bit to record whether
2953 we have initialized it already.
2955 When doing a dynamic link, we create a .rela.got
2956 relocation entry to initialize the value. This
2957 is done in the finish_dynamic_symbol routine. */
2962 bfd_put_32 (output_bfd
, relocation
,
2963 sgot
->contents
+ off
);
2968 unresolved_reloc
= FALSE
;
2972 BFD_ASSERT (local_got_offsets
!= NULL
);
2973 off
= local_got_offsets
[r_symndx
];
2974 BFD_ASSERT (off
!= (bfd_vma
) - 1);
2976 /* The offset must always be a multiple of 4. We use
2977 the least significant bit to record whether we have
2978 already generated the necessary reloc. */
2983 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
2988 Elf_Internal_Rela outrel
;
2991 s
= bfd_get_section_by_name (dynobj
, ".rela.got");
2992 BFD_ASSERT (s
!= NULL
);
2994 outrel
.r_offset
= (sgot
->output_section
->vma
2995 + sgot
->output_offset
+ off
);
2997 ELF32_R_INFO (0, R_pcrel24
);
2998 outrel
.r_addend
= relocation
;
3001 s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3002 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
3005 local_got_offsets
[r_symndx
] |= 1;
3009 relocation
= sgot
->output_offset
+ off
;
3011 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
3017 case R_pcrel24_jump_l
:
3021 relocation
+= rel
->r_addend
;
3023 /* Perform usual pc-relative correction. */
3024 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
3025 relocation
-= address
;
3027 /* We are getting reloc_entry->address 2 byte off from
3028 the start of instruction. Assuming absolute postion
3029 of the reloc data. But, following code had been written assuming
3030 reloc address is starting at begining of instruction.
3031 To compensate that I have increased the value of
3032 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
3039 x
= bfd_get_16 (input_bfd
, contents
+ address
);
3040 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
3041 bfd_put_16 (input_bfd
, x
, contents
+ address
);
3043 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
3044 x
= relocation
& 0xFFFF;
3045 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
3052 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3054 relocation
, rel
->r_addend
);
3059 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3060 because such sections are not SEC_ALLOC and thus ld.so will
3061 not process them. */
3062 if (unresolved_reloc
3063 && !((input_section
->flags
& SEC_DEBUGGING
) != 0 && h
->def_dynamic
))
3065 (*_bfd_error_handler
)
3066 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3068 input_section
, (long) rel
->r_offset
, h
->root
.root
.string
);
3072 if (r
!= bfd_reloc_ok
)
3077 name
= h
->root
.root
.string
;
3080 name
= bfd_elf_string_from_elf_section (input_bfd
,
3081 symtab_hdr
->sh_link
,
3086 name
= bfd_section_name (input_bfd
, sec
);
3089 if (r
== bfd_reloc_overflow
)
3091 if (!(info
->callbacks
->reloc_overflow
3092 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3093 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
)))
3098 (*_bfd_error_handler
)
3099 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3100 input_bfd
, input_section
,
3101 (long) rel
->r_offset
, name
, (int) r
);
3111 bfin_gc_mark_hook (asection
* sec
,
3112 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3113 Elf_Internal_Rela
* rel
,
3114 struct elf_link_hash_entry
*h
,
3115 Elf_Internal_Sym
* sym
)
3119 switch (ELF32_R_TYPE (rel
->r_info
))
3122 case R_BFIN_GNU_VTINHERIT
:
3123 case R_BFIN_GNU_VTENTRY
:
3127 switch (h
->root
.type
)
3132 case bfd_link_hash_defined
:
3133 case bfd_link_hash_defweak
:
3134 return h
->root
.u
.def
.section
;
3136 case bfd_link_hash_common
:
3137 return h
->root
.u
.c
.p
->section
;
3142 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
3148 /* Update the got entry reference counts for the section being removed. */
3151 bfinfdpic_gc_sweep_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
3152 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3153 asection
*sec ATTRIBUTE_UNUSED
,
3154 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
3159 /* Update the got entry reference counts for the section being removed. */
3162 bfin_gc_sweep_hook (bfd
* abfd
,
3163 struct bfd_link_info
*info
,
3165 const Elf_Internal_Rela
* relocs
)
3167 Elf_Internal_Shdr
*symtab_hdr
;
3168 struct elf_link_hash_entry
**sym_hashes
;
3169 bfd_signed_vma
*local_got_refcounts
;
3170 const Elf_Internal_Rela
*rel
, *relend
;
3175 dynobj
= elf_hash_table (info
)->dynobj
;
3179 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3180 sym_hashes
= elf_sym_hashes (abfd
);
3181 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3183 sgot
= bfd_get_section_by_name (dynobj
, ".got");
3184 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
3186 relend
= relocs
+ sec
->reloc_count
;
3187 for (rel
= relocs
; rel
< relend
; rel
++)
3189 unsigned long r_symndx
;
3190 struct elf_link_hash_entry
*h
;
3192 switch (ELF32_R_TYPE (rel
->r_info
))
3195 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3196 if (r_symndx
>= symtab_hdr
->sh_info
)
3198 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3199 if (h
->got
.refcount
> 0)
3202 if (h
->got
.refcount
== 0)
3204 /* We don't need the .got entry any more. */
3206 srelgot
->size
-= sizeof (Elf32_External_Rela
);
3210 else if (local_got_refcounts
!= NULL
)
3212 if (local_got_refcounts
[r_symndx
] > 0)
3214 --local_got_refcounts
[r_symndx
];
3215 if (local_got_refcounts
[r_symndx
] == 0)
3217 /* We don't need the .got entry any more. */
3220 srelgot
->size
-= sizeof (Elf32_External_Rela
);
3232 /* We need dynamic symbols for every section, since segments can
3233 relocate independently. */
3235 _bfinfdpic_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3236 struct bfd_link_info
*info
3238 asection
*p ATTRIBUTE_UNUSED
)
3240 switch (elf_section_data (p
)->this_hdr
.sh_type
)
3244 /* If sh_type is yet undecided, assume it could be
3245 SHT_PROGBITS/SHT_NOBITS. */
3249 /* There shouldn't be section relative relocations
3250 against any other section. */
3256 /* Create a .got section, as well as its additional info field. This
3257 is almost entirely copied from
3258 elflink.c:_bfd_elf_create_got_section(). */
3261 _bfin_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
3263 flagword flags
, pltflags
;
3265 struct elf_link_hash_entry
*h
;
3266 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3270 /* This function may be called more than once. */
3271 s
= bfd_get_section_by_name (abfd
, ".got");
3272 if (s
!= NULL
&& (s
->flags
& SEC_LINKER_CREATED
) != 0)
3275 /* Machine specific: although pointers are 32-bits wide, we want the
3276 GOT to be aligned to a 64-bit boundary, such that function
3277 descriptors in it can be accessed with 64-bit loads and
3281 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3282 | SEC_LINKER_CREATED
);
3285 s
= bfd_make_section_with_flags (abfd
, ".got", flags
);
3287 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3290 if (bed
->want_got_plt
)
3292 s
= bfd_make_section_with_flags (abfd
, ".got.plt", flags
);
3294 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3298 if (bed
->want_got_sym
)
3300 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3301 (or .got.plt) section. We don't do this in the linker script
3302 because we don't want to define the symbol if we are not creating
3303 a global offset table. */
3304 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "__GLOBAL_OFFSET_TABLE_");
3305 elf_hash_table (info
)->hgot
= h
;
3309 /* Machine-specific: we want the symbol for executables as
3311 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3315 /* The first bit of the global offset table is the header. */
3316 s
->size
+= bed
->got_header_size
;
3318 /* This is the machine-specific part. Create and initialize section
3319 data for the got. */
3320 if (IS_FDPIC (abfd
))
3322 bfinfdpic_got_section (info
) = s
;
3323 bfinfdpic_relocs_info (info
) = htab_try_create (1,
3324 bfinfdpic_relocs_info_hash
,
3325 bfinfdpic_relocs_info_eq
,
3327 if (! bfinfdpic_relocs_info (info
))
3330 s
= bfd_make_section_with_flags (abfd
, ".rel.got",
3331 (flags
| SEC_READONLY
));
3333 || ! bfd_set_section_alignment (abfd
, s
, 2))
3336 bfinfdpic_gotrel_section (info
) = s
;
3338 /* Machine-specific. */
3339 s
= bfd_make_section_with_flags (abfd
, ".rofixup",
3340 (flags
| SEC_READONLY
));
3342 || ! bfd_set_section_alignment (abfd
, s
, 2))
3345 bfinfdpic_gotfixup_section (info
) = s
;
3352 flags
= BSF_GLOBAL
| BSF_WEAK
;
3358 /* Make sure the got and plt sections exist, and that our pointers in
3359 the link hash table point to them. */
3362 elf32_bfinfdpic_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3364 /* This is mostly copied from
3365 elflink.c:_bfd_elf_create_dynamic_sections(). */
3366 flagword flags
, pltflags
;
3368 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3370 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3371 .rel[a].bss sections. */
3373 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3374 | SEC_LINKER_CREATED
);
3377 pltflags
|= SEC_CODE
;
3378 if (bed
->plt_not_loaded
)
3379 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
3380 if (bed
->plt_readonly
)
3381 pltflags
|= SEC_READONLY
;
3383 s
= bfd_make_section (abfd
, ".plt");
3385 || ! bfd_set_section_flags (abfd
, s
, pltflags
)
3386 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
3388 /* Blackfin-specific: remember it. */
3389 bfinfdpic_plt_section (info
) = s
;
3391 if (bed
->want_plt_sym
)
3393 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3395 struct elf_link_hash_entry
*h
;
3396 struct bfd_link_hash_entry
*bh
= NULL
;
3398 if (! (_bfd_generic_link_add_one_symbol
3399 (info
, abfd
, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
, 0, NULL
,
3400 FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
3402 h
= (struct elf_link_hash_entry
*) bh
;
3404 h
->type
= STT_OBJECT
;
3406 if (! info
->executable
3407 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3411 /* Blackfin-specific: we want rel relocations for the plt. */
3412 s
= bfd_make_section (abfd
, ".rel.plt");
3414 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
3415 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3417 /* Blackfin-specific: remember it. */
3418 bfinfdpic_pltrel_section (info
) = s
;
3420 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3421 if (! _bfin_create_got_section (abfd
, info
))
3424 /* Blackfin-specific: make sure we created everything we wanted. */
3425 BFD_ASSERT (bfinfdpic_got_section (info
) && bfinfdpic_gotrel_section (info
)
3426 /* && bfinfdpic_gotfixup_section (info) */
3427 && bfinfdpic_plt_section (info
)
3428 && bfinfdpic_pltrel_section (info
));
3430 if (bed
->want_dynbss
)
3432 /* The .dynbss section is a place to put symbols which are defined
3433 by dynamic objects, are referenced by regular objects, and are
3434 not functions. We must allocate space for them in the process
3435 image and use a R_*_COPY reloc to tell the dynamic linker to
3436 initialize them at run time. The linker script puts the .dynbss
3437 section into the .bss section of the final image. */
3438 s
= bfd_make_section (abfd
, ".dynbss");
3440 || ! bfd_set_section_flags (abfd
, s
, SEC_ALLOC
| SEC_LINKER_CREATED
))
3443 /* The .rel[a].bss section holds copy relocs. This section is not
3444 normally needed. We need to create it here, though, so that the
3445 linker will map it to an output section. We can't just create it
3446 only if we need it, because we will not know whether we need it
3447 until we have seen all the input files, and the first time the
3448 main linker code calls BFD after examining all the input files
3449 (size_dynamic_sections) the input sections have already been
3450 mapped to the output sections. If the section turns out not to
3451 be needed, we can discard it later. We will never need this
3452 section when generating a shared object, since they do not use
3456 s
= bfd_make_section (abfd
,
3457 (bed
->default_use_rela_p
3458 ? ".rela.bss" : ".rel.bss"));
3460 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
3461 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3469 /* The name of the dynamic interpreter. This is put in the .interp
3472 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3474 #define DEFAULT_STACK_SIZE 0x20000
3476 /* This structure is used to collect the number of entries present in
3477 each addressable range of the got. */
3478 struct _bfinfdpic_dynamic_got_info
3480 /* Several bits of information about the current link. */
3481 struct bfd_link_info
*info
;
3482 /* Total size needed for GOT entries within the 18- or 32-bit
3484 bfd_vma got17m4
, gothilo
;
3485 /* Total size needed for function descriptor entries within the 18-
3486 or 32-bit ranges. */
3487 bfd_vma fd17m4
, fdhilo
;
3488 /* Total size needed function descriptor entries referenced in PLT
3489 entries, that would be profitable to place in offsets close to
3490 the PIC register. */
3492 /* Total size needed by lazy PLT entries. */
3494 /* Number of relocations carried over from input object files. */
3495 unsigned long relocs
;
3496 /* Number of fixups introduced by relocations in input object files. */
3497 unsigned long fixups
;
3500 /* Compute the total GOT size required by each symbol in each range.
3501 Symbols may require up to 4 words in the GOT: an entry pointing to
3502 the symbol, an entry pointing to its function descriptor, and a
3503 private function descriptors taking two words. */
3506 _bfinfdpic_count_got_plt_entries (void **entryp
, void *dinfo_
)
3508 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3509 struct _bfinfdpic_dynamic_got_info
*dinfo
= dinfo_
;
3510 unsigned relocs
= 0, fixups
= 0;
3512 /* Allocate space for a GOT entry pointing to the symbol. */
3514 dinfo
->got17m4
+= 4;
3515 else if (entry
->gothilo
)
3516 dinfo
->gothilo
+= 4;
3521 /* Allocate space for a GOT entry pointing to the function
3523 if (entry
->fdgot17m4
)
3524 dinfo
->got17m4
+= 4;
3525 else if (entry
->fdgothilo
)
3526 dinfo
->gothilo
+= 4;
3531 /* Decide whether we need a PLT entry, a function descriptor in the
3532 GOT, and a lazy PLT entry for this symbol. */
3533 entry
->plt
= entry
->call
3534 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3535 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3536 entry
->privfd
= entry
->plt
3537 || entry
->fdgoff17m4
|| entry
->fdgoffhilo
3538 || ((entry
->fd
|| entry
->fdgot17m4
|| entry
->fdgothilo
)
3539 && (entry
->symndx
!= -1
3540 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
)));
3541 entry
->lazyplt
= entry
->privfd
3542 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3543 && ! (dinfo
->info
->flags
& DF_BIND_NOW
)
3544 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3546 /* Allocate space for a function descriptor. */
3547 if (entry
->fdgoff17m4
)
3549 else if (entry
->privfd
&& entry
->plt
)
3551 else if (entry
->privfd
)
3558 dinfo
->lzplt
+= LZPLT_NORMAL_SIZE
;
3560 if (!dinfo
->info
->executable
|| dinfo
->info
->pie
)
3561 relocs
= entry
->relocs32
+ entry
->relocsfd
+ entry
->relocsfdv
;
3564 if (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
))
3566 if (entry
->symndx
!= -1
3567 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3568 fixups
+= entry
->relocs32
+ 2 * entry
->relocsfdv
;
3571 relocs
+= entry
->relocs32
+ entry
->relocsfdv
;
3573 if (entry
->symndx
!= -1
3574 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
))
3576 if (entry
->symndx
!= -1
3577 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3578 fixups
+= entry
->relocsfd
;
3581 relocs
+= entry
->relocsfd
;
3584 entry
->dynrelocs
+= relocs
;
3585 entry
->fixups
+= fixups
;
3586 dinfo
->relocs
+= relocs
;
3587 dinfo
->fixups
+= fixups
;
3592 /* This structure is used to assign offsets to got entries, function
3593 descriptors, plt entries and lazy plt entries. */
3595 struct _bfinfdpic_dynamic_got_plt_info
3597 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3598 struct _bfinfdpic_dynamic_got_info g
;
3600 /* For each addressable range, we record a MAX (positive) and MIN
3601 (negative) value. CUR is used to assign got entries, and it's
3602 incremented from an initial positive value to MAX, then from MIN
3603 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3604 assign function descriptors, and it's decreased from an initial
3605 non-positive value to MIN, then from MAX down to CUR (unless CUR
3606 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3607 to even words. ODD, if non-zero, indicates an odd word to be
3608 used for the next got entry, otherwise CUR is used and
3609 incremented by a pair of words, wrapping around when it reaches
3610 MAX. FDCUR is decremented (and wrapped) before the next function
3611 descriptor is chosen. FDPLT indicates the number of remaining
3612 slots that can be used for function descriptors used only by PLT
3614 struct _bfinfdpic_dynamic_got_alloc_data
3616 bfd_signed_vma max
, cur
, odd
, fdcur
, min
;
3621 /* Determine the positive and negative ranges to be used by each
3622 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3623 double-word boundary, are the minimum (negative) and maximum
3624 (positive) GOT offsets already used by previous ranges, except for
3625 an ODD entry that may have been left behind. GOT and FD indicate
3626 the size of GOT entries and function descriptors that must be
3627 placed within the range from -WRAP to WRAP. If there's room left,
3628 up to FDPLT bytes should be reserved for additional function
3631 inline static bfd_signed_vma
3632 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data
*gad
,
3633 bfd_signed_vma fdcur
,
3641 bfd_signed_vma wrapmin
= -wrap
;
3643 /* Start at the given initial points. */
3647 /* If we had an incoming odd word and we have any got entries that
3648 are going to use it, consume it, otherwise leave gad->odd at
3649 zero. We might force gad->odd to zero and return the incoming
3650 odd such that it is used by the next range, but then GOT entries
3651 might appear to be out of order and we wouldn't be able to
3652 shorten the GOT by one word if it turns out to end with an
3653 unpaired GOT entry. */
3663 /* If we're left with an unpaired GOT entry, compute its location
3664 such that we can return it. Otherwise, if got doesn't require an
3665 odd number of words here, either odd was already zero in the
3666 block above, or it was set to zero because got was non-zero, or
3667 got was already zero. In the latter case, we want the value of
3668 odd to carry over to the return statement, so we don't want to
3669 reset odd unless the condition below is true. */
3676 /* Compute the tentative boundaries of this range. */
3677 gad
->max
= cur
+ got
;
3678 gad
->min
= fdcur
- fd
;
3681 /* If function descriptors took too much space, wrap some of them
3683 if (gad
->min
< wrapmin
)
3685 gad
->max
+= wrapmin
- gad
->min
;
3688 /* If there is space left and we have function descriptors
3689 referenced in PLT entries that could take advantage of shorter
3690 offsets, place them here. */
3691 else if (fdplt
&& gad
->min
> wrapmin
)
3694 if ((bfd_vma
) (gad
->min
- wrapmin
) < fdplt
)
3695 fds
= gad
->min
- wrapmin
;
3704 /* If GOT entries took too much space, wrap some of them around.
3705 This may well cause gad->min to become lower than wrapmin. This
3706 will cause a relocation overflow later on, so we don't have to
3708 if ((bfd_vma
) gad
->max
> wrap
)
3710 gad
->min
-= gad
->max
- wrap
;
3713 /* If there is more space left, try to place some more function
3714 descriptors for PLT entries. */
3715 else if (fdplt
&& (bfd_vma
) gad
->max
< wrap
)
3718 if ((bfd_vma
) (wrap
- gad
->max
) < fdplt
)
3719 fds
= wrap
- gad
->max
;
3728 /* If odd was initially computed as an offset past the wrap point,
3731 odd
= gad
->min
+ odd
- gad
->max
;
3733 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3734 before returning, so do it here too. This guarantees that,
3735 should cur and fdcur meet at the wrap point, they'll both be
3737 if (gad
->cur
== gad
->max
)
3738 gad
->cur
= gad
->min
;
3743 /* Compute the location of the next GOT entry, given the allocation
3744 data for a range. */
3746 inline static bfd_signed_vma
3747 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3753 /* If there was an odd word left behind, use it. */
3759 /* Otherwise, use the word pointed to by cur, reserve the next
3760 as an odd word, and skip to the next pair of words, possibly
3763 gad
->odd
= gad
->cur
+ 4;
3765 if (gad
->cur
== gad
->max
)
3766 gad
->cur
= gad
->min
;
3772 /* Compute the location of the next function descriptor entry in the
3773 GOT, given the allocation data for a range. */
3775 inline static bfd_signed_vma
3776 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3778 /* If we're at the bottom, wrap around, and only then allocate the
3779 next pair of words. */
3780 if (gad
->fdcur
== gad
->min
)
3781 gad
->fdcur
= gad
->max
;
3782 return gad
->fdcur
-= 8;
3785 /* Assign GOT offsets for every GOT entry and function descriptor.
3786 Doing everything in a single pass is tricky. */
3789 _bfinfdpic_assign_got_entries (void **entryp
, void *info_
)
3791 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3792 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3795 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3796 else if (entry
->gothilo
)
3797 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3799 if (entry
->fdgot17m4
)
3800 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3801 else if (entry
->fdgothilo
)
3802 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3804 if (entry
->fdgoff17m4
)
3805 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3806 else if (entry
->plt
&& dinfo
->got17m4
.fdplt
)
3808 dinfo
->got17m4
.fdplt
-= 8;
3809 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3811 else if (entry
->plt
)
3813 dinfo
->gothilo
.fdplt
-= 8;
3814 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3816 else if (entry
->privfd
)
3817 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3822 /* Assign GOT offsets to private function descriptors used by PLT
3823 entries (or referenced by 32-bit offsets), as well as PLT entries
3824 and lazy PLT entries. */
3827 _bfinfdpic_assign_plt_entries (void **entryp
, void *info_
)
3829 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3830 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3832 /* If this symbol requires a local function descriptor, allocate
3834 if (entry
->privfd
&& entry
->fd_entry
== 0)
3836 if (dinfo
->got17m4
.fdplt
)
3838 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3839 dinfo
->got17m4
.fdplt
-= 8;
3843 BFD_ASSERT (dinfo
->gothilo
.fdplt
);
3844 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3845 dinfo
->gothilo
.fdplt
-= 8;
3853 /* We use the section's raw size to mark the location of the
3855 entry
->plt_entry
= bfinfdpic_plt_section (dinfo
->g
.info
)->size
;
3857 /* Figure out the length of this PLT entry based on the
3858 addressing mode we need to reach the function descriptor. */
3859 BFD_ASSERT (entry
->fd_entry
);
3860 if (entry
->fd_entry
>= -(1 << (18 - 1))
3861 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
3866 bfinfdpic_plt_section (dinfo
->g
.info
)->size
+= size
;
3871 entry
->lzplt_entry
= dinfo
->g
.lzplt
;
3872 dinfo
->g
.lzplt
+= LZPLT_NORMAL_SIZE
;
3873 /* If this entry is the one that gets the resolver stub, account
3874 for the additional instruction. */
3875 if (entry
->lzplt_entry
% BFINFDPIC_LZPLT_BLOCK_SIZE
3876 == BFINFDPIC_LZPLT_RESOLV_LOC
)
3877 dinfo
->g
.lzplt
+= LZPLT_RESOLVER_EXTRA
;
3883 /* Follow indirect and warning hash entries so that each got entry
3884 points to the final symbol definition. P must point to a pointer
3885 to the hash table we're traversing. Since this traversal may
3886 modify the hash table, we set this pointer to NULL to indicate
3887 we've made a potentially-destructive change to the hash table, so
3888 the traversal must be restarted. */
3890 _bfinfdpic_resolve_final_relocs_info (void **entryp
, void *p
)
3892 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3895 if (entry
->symndx
== -1)
3897 struct elf_link_hash_entry
*h
= entry
->d
.h
;
3898 struct bfinfdpic_relocs_info
*oentry
;
3900 while (h
->root
.type
== bfd_link_hash_indirect
3901 || h
->root
.type
== bfd_link_hash_warning
)
3902 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
3904 if (entry
->d
.h
== h
)
3907 oentry
= bfinfdpic_relocs_info_for_global (*htab
, 0, h
, entry
->addend
,
3912 /* Merge the two entries. */
3913 bfinfdpic_pic_merge_early_relocs_info (oentry
, entry
);
3914 htab_clear_slot (*htab
, entryp
);
3920 /* If we can't find this entry with the new bfd hash, re-insert
3921 it, and get the traversal restarted. */
3922 if (! htab_find (*htab
, entry
))
3924 htab_clear_slot (*htab
, entryp
);
3925 entryp
= htab_find_slot (*htab
, entry
, INSERT
);
3928 /* Abort the traversal, since the whole table may have
3929 moved, and leave it up to the parent to restart the
3931 *(htab_t
*)p
= NULL
;
3939 /* Set the sizes of the dynamic sections. */
3942 elf32_bfinfdpic_size_dynamic_sections (bfd
*output_bfd
,
3943 struct bfd_link_info
*info
)
3947 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
3951 dynobj
= elf_hash_table (info
)->dynobj
;
3952 BFD_ASSERT (dynobj
!= NULL
);
3954 if (elf_hash_table (info
)->dynamic_sections_created
)
3956 /* Set the contents of the .interp section to the interpreter. */
3957 if (info
->executable
)
3959 s
= bfd_get_section_by_name (dynobj
, ".interp");
3960 BFD_ASSERT (s
!= NULL
);
3961 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
3962 s
->contents
= (bfd_byte
*) ELF_DYNAMIC_INTERPRETER
;
3966 memset (&gpinfo
, 0, sizeof (gpinfo
));
3967 gpinfo
.g
.info
= info
;
3971 htab_t relocs
= bfinfdpic_relocs_info (info
);
3973 htab_traverse (relocs
, _bfinfdpic_resolve_final_relocs_info
, &relocs
);
3975 if (relocs
== bfinfdpic_relocs_info (info
))
3979 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_count_got_plt_entries
,
3983 /* Compute the total size taken by entries in the 18-bit range,
3984 to tell how many PLT function descriptors we can bring into it
3985 without causing it to overflow. */
3986 limit
= odd
+ gpinfo
.g
.got17m4
+ gpinfo
.g
.fd17m4
;
3987 if (limit
< (bfd_vma
)1 << 18)
3988 limit
= ((bfd_vma
)1 << 18) - limit
;
3991 if (gpinfo
.g
.fdplt
< limit
)
3992 limit
= gpinfo
.g
.fdplt
;
3994 /* Determine the ranges of GOT offsets that we can use for each
3995 range of addressing modes. */
3996 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfo
.got17m4
,
4003 (bfd_vma
)1 << (18-1));
4004 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfo
.gothilo
,
4010 gpinfo
.g
.fdplt
- gpinfo
.got17m4
.fdplt
,
4011 (bfd_vma
)1 << (32-1));
4013 /* Now assign (most) GOT offsets. */
4014 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_got_entries
,
4017 bfinfdpic_got_section (info
)->size
= gpinfo
.gothilo
.max
4018 - gpinfo
.gothilo
.min
4019 /* If an odd word is the last word of the GOT, we don't need this
4020 word to be part of the GOT. */
4021 - (odd
+ 4 == gpinfo
.gothilo
.max
? 4 : 0);
4022 if (bfinfdpic_got_section (info
)->size
== 0)
4023 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
4024 else if (bfinfdpic_got_section (info
)->size
== 12
4025 && ! elf_hash_table (info
)->dynamic_sections_created
)
4027 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
4028 bfinfdpic_got_section (info
)->size
= 0;
4032 bfinfdpic_got_section (info
)->contents
=
4033 (bfd_byte
*) bfd_zalloc (dynobj
,
4034 bfinfdpic_got_section (info
)->size
);
4035 if (bfinfdpic_got_section (info
)->contents
== NULL
)
4039 if (elf_hash_table (info
)->dynamic_sections_created
)
4040 /* Subtract the number of lzplt entries, since those will generate
4041 relocations in the pltrel section. */
4042 bfinfdpic_gotrel_section (info
)->size
=
4043 (gpinfo
.g
.relocs
- gpinfo
.g
.lzplt
/ LZPLT_NORMAL_SIZE
)
4044 * get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
4046 BFD_ASSERT (gpinfo
.g
.relocs
== 0);
4047 if (bfinfdpic_gotrel_section (info
)->size
== 0)
4048 bfinfdpic_gotrel_section (info
)->flags
|= SEC_EXCLUDE
;
4051 bfinfdpic_gotrel_section (info
)->contents
=
4052 (bfd_byte
*) bfd_zalloc (dynobj
,
4053 bfinfdpic_gotrel_section (info
)->size
);
4054 if (bfinfdpic_gotrel_section (info
)->contents
== NULL
)
4058 bfinfdpic_gotfixup_section (info
)->size
= (gpinfo
.g
.fixups
+ 1) * 4;
4059 if (bfinfdpic_gotfixup_section (info
)->size
== 0)
4060 bfinfdpic_gotfixup_section (info
)->flags
|= SEC_EXCLUDE
;
4063 bfinfdpic_gotfixup_section (info
)->contents
=
4064 (bfd_byte
*) bfd_zalloc (dynobj
,
4065 bfinfdpic_gotfixup_section (info
)->size
);
4066 if (bfinfdpic_gotfixup_section (info
)->contents
== NULL
)
4070 if (elf_hash_table (info
)->dynamic_sections_created
)
4072 bfinfdpic_pltrel_section (info
)->size
=
4073 gpinfo
.g
.lzplt
/ LZPLT_NORMAL_SIZE
* get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
4074 if (bfinfdpic_pltrel_section (info
)->size
== 0)
4075 bfinfdpic_pltrel_section (info
)->flags
|= SEC_EXCLUDE
;
4078 bfinfdpic_pltrel_section (info
)->contents
=
4079 (bfd_byte
*) bfd_zalloc (dynobj
,
4080 bfinfdpic_pltrel_section (info
)->size
);
4081 if (bfinfdpic_pltrel_section (info
)->contents
== NULL
)
4086 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4087 such that there's room for the additional instruction needed to
4088 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4089 account for them, our block size is 4 bytes smaller than the real
4091 if (elf_hash_table (info
)->dynamic_sections_created
)
4093 bfinfdpic_plt_section (info
)->size
= gpinfo
.g
.lzplt
4094 + ((gpinfo
.g
.lzplt
+ (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) - LZPLT_NORMAL_SIZE
)
4095 / (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) * LZPLT_RESOLVER_EXTRA
);
4098 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4099 actually assign lazy PLT entries addresses. */
4102 /* Save information that we're going to need to generate GOT and PLT
4104 bfinfdpic_got_initial_offset (info
) = -gpinfo
.gothilo
.min
;
4106 if (get_elf_backend_data (output_bfd
)->want_got_sym
)
4107 elf_hash_table (info
)->hgot
->root
.u
.def
.value
4108 += bfinfdpic_got_initial_offset (info
);
4110 if (elf_hash_table (info
)->dynamic_sections_created
)
4111 bfinfdpic_plt_initial_offset (info
) =
4112 bfinfdpic_plt_section (info
)->size
;
4114 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_plt_entries
,
4117 /* Allocate the PLT section contents only after
4118 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4119 non-lazy PLT entries. */
4120 if (elf_hash_table (info
)->dynamic_sections_created
)
4122 if (bfinfdpic_plt_section (info
)->size
== 0)
4123 bfinfdpic_plt_section (info
)->flags
|= SEC_EXCLUDE
;
4126 bfinfdpic_plt_section (info
)->contents
=
4127 (bfd_byte
*) bfd_zalloc (dynobj
,
4128 bfinfdpic_plt_section (info
)->size
);
4129 if (bfinfdpic_plt_section (info
)->contents
== NULL
)
4134 if (elf_hash_table (info
)->dynamic_sections_created
)
4136 if (bfinfdpic_got_section (info
)->size
)
4137 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTGOT
, 0))
4140 if (bfinfdpic_pltrel_section (info
)->size
)
4141 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
4142 || !_bfd_elf_add_dynamic_entry (info
, DT_PLTREL
, DT_REL
)
4143 || !_bfd_elf_add_dynamic_entry (info
, DT_JMPREL
, 0))
4146 if (bfinfdpic_gotrel_section (info
)->size
)
4147 if (!_bfd_elf_add_dynamic_entry (info
, DT_REL
, 0)
4148 || !_bfd_elf_add_dynamic_entry (info
, DT_RELSZ
, 0)
4149 || !_bfd_elf_add_dynamic_entry (info
, DT_RELENT
,
4150 sizeof (Elf32_External_Rel
)))
4158 elf32_bfinfdpic_always_size_sections (bfd
*output_bfd
,
4159 struct bfd_link_info
*info
)
4161 if (!info
->relocatable
)
4163 struct elf_link_hash_entry
*h
;
4166 /* Force a PT_GNU_STACK segment to be created. */
4167 if (! elf_tdata (output_bfd
)->stack_flags
)
4168 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
| PF_X
;
4170 /* Define __stacksize if it's not defined yet. */
4171 h
= elf_link_hash_lookup (elf_hash_table (info
), "__stacksize",
4172 FALSE
, FALSE
, FALSE
);
4173 if (! h
|| h
->root
.type
!= bfd_link_hash_defined
4174 || h
->type
!= STT_OBJECT
4177 struct bfd_link_hash_entry
*bh
= NULL
;
4179 if (!(_bfd_generic_link_add_one_symbol
4180 (info
, output_bfd
, "__stacksize",
4181 BSF_GLOBAL
, bfd_abs_section_ptr
, DEFAULT_STACK_SIZE
,
4182 (const char *) NULL
, FALSE
,
4183 get_elf_backend_data (output_bfd
)->collect
, &bh
)))
4186 h
= (struct elf_link_hash_entry
*) bh
;
4188 h
->type
= STT_OBJECT
;
4191 /* Create a stack section, and set its alignment. */
4192 sec
= bfd_make_section (output_bfd
, ".stack");
4195 || ! bfd_set_section_alignment (output_bfd
, sec
, 3))
4203 elf32_bfinfdpic_modify_segment_map (bfd
*output_bfd
,
4204 struct bfd_link_info
*info
)
4206 struct elf_segment_map
*m
;
4208 /* objcopy and strip preserve what's already there using
4209 elf32_bfinfdpic_copy_private_bfd_data (). */
4213 for (m
= elf_tdata (output_bfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4214 if (m
->p_type
== PT_GNU_STACK
)
4219 asection
*sec
= bfd_get_section_by_name (output_bfd
, ".stack");
4220 struct elf_link_hash_entry
*h
;
4224 /* Obtain the pointer to the __stacksize symbol. */
4225 h
= elf_link_hash_lookup (elf_hash_table (info
), "__stacksize",
4226 FALSE
, FALSE
, FALSE
);
4227 while (h
->root
.type
== bfd_link_hash_indirect
4228 || h
->root
.type
== bfd_link_hash_warning
)
4229 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
4230 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
);
4232 /* Set the section size from the symbol value. We
4233 intentionally ignore the symbol section. */
4234 if (h
->root
.type
== bfd_link_hash_defined
)
4235 sec
->size
= h
->root
.u
.def
.value
;
4237 sec
->size
= DEFAULT_STACK_SIZE
;
4239 /* Add the stack section to the PT_GNU_STACK segment,
4240 such that its size and alignment requirements make it
4242 m
->sections
[m
->count
] = sec
;
4251 elf32_bfinfdpic_finish_dynamic_sections (bfd
*output_bfd
,
4252 struct bfd_link_info
*info
)
4257 dynobj
= elf_hash_table (info
)->dynobj
;
4259 if (bfinfdpic_got_section (info
))
4261 BFD_ASSERT (bfinfdpic_gotrel_section (info
)->size
4262 == (bfinfdpic_gotrel_section (info
)->reloc_count
4263 * sizeof (Elf32_External_Rel
)));
4265 if (bfinfdpic_gotfixup_section (info
))
4267 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
4268 bfd_vma got_value
= hgot
->root
.u
.def
.value
4269 + hgot
->root
.u
.def
.section
->output_section
->vma
4270 + hgot
->root
.u
.def
.section
->output_offset
;
4272 _bfinfdpic_add_rofixup (output_bfd
, bfinfdpic_gotfixup_section (info
),
4275 if (bfinfdpic_gotfixup_section (info
)->size
4276 != (bfinfdpic_gotfixup_section (info
)->reloc_count
* 4))
4278 (*_bfd_error_handler
)
4279 ("LINKER BUG: .rofixup section size mismatch");
4284 if (elf_hash_table (info
)->dynamic_sections_created
)
4286 BFD_ASSERT (bfinfdpic_pltrel_section (info
)->size
4287 == (bfinfdpic_pltrel_section (info
)->reloc_count
4288 * sizeof (Elf32_External_Rel
)));
4291 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4293 if (elf_hash_table (info
)->dynamic_sections_created
)
4295 Elf32_External_Dyn
* dyncon
;
4296 Elf32_External_Dyn
* dynconend
;
4298 BFD_ASSERT (sdyn
!= NULL
);
4300 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4301 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4303 for (; dyncon
< dynconend
; dyncon
++)
4305 Elf_Internal_Dyn dyn
;
4307 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4315 dyn
.d_un
.d_ptr
= bfinfdpic_got_section (info
)->output_section
->vma
4316 + bfinfdpic_got_section (info
)->output_offset
4317 + bfinfdpic_got_initial_offset (info
);
4318 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4322 dyn
.d_un
.d_ptr
= bfinfdpic_pltrel_section (info
)
4323 ->output_section
->vma
4324 + bfinfdpic_pltrel_section (info
)->output_offset
;
4325 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4329 dyn
.d_un
.d_val
= bfinfdpic_pltrel_section (info
)->size
;
4330 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4339 /* Adjust a symbol defined by a dynamic object and referenced by a
4343 elf32_bfinfdpic_adjust_dynamic_symbol
4344 (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4345 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
)
4349 dynobj
= elf_hash_table (info
)->dynobj
;
4351 /* Make sure we know what is going on here. */
4352 BFD_ASSERT (dynobj
!= NULL
4353 && (h
->u
.weakdef
!= NULL
4356 && !h
->def_regular
)));
4358 /* If this is a weak symbol, and there is a real definition, the
4359 processor independent code will have arranged for us to see the
4360 real definition first, and we can just use the same value. */
4361 if (h
->u
.weakdef
!= NULL
)
4363 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
4364 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
4365 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
4366 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
4372 /* Perform any actions needed for dynamic symbols. */
4375 elf32_bfinfdpic_finish_dynamic_symbol
4376 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4377 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4378 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
4379 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4384 /* Decide whether to attempt to turn absptr or lsda encodings in
4385 shared libraries into pcrel within the given input section. */
4388 bfinfdpic_elf_use_relative_eh_frame
4389 (bfd
*input_bfd ATTRIBUTE_UNUSED
,
4390 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4391 asection
*eh_frame_section ATTRIBUTE_UNUSED
)
4393 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4397 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4400 bfinfdpic_elf_encode_eh_address (bfd
*abfd
,
4401 struct bfd_link_info
*info
,
4402 asection
*osec
, bfd_vma offset
,
4403 asection
*loc_sec
, bfd_vma loc_offset
,
4406 struct elf_link_hash_entry
*h
;
4408 h
= elf_hash_table (info
)->hgot
;
4409 BFD_ASSERT (h
&& h
->root
.type
== bfd_link_hash_defined
);
4411 if (! h
|| (_bfinfdpic_osec_to_segment (abfd
, osec
)
4412 == _bfinfdpic_osec_to_segment (abfd
, loc_sec
->output_section
)))
4413 return _bfd_elf_encode_eh_address (abfd
, info
, osec
, offset
,
4414 loc_sec
, loc_offset
, encoded
);
4416 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd
, osec
)
4417 == (_bfinfdpic_osec_to_segment
4418 (abfd
, h
->root
.u
.def
.section
->output_section
)));
4420 *encoded
= osec
->vma
+ offset
4421 - (h
->root
.u
.def
.value
4422 + h
->root
.u
.def
.section
->output_section
->vma
4423 + h
->root
.u
.def
.section
->output_offset
);
4425 return DW_EH_PE_datarel
| DW_EH_PE_sdata4
;
4430 /* Look through the relocs for a section during the first phase.
4432 Besides handling virtual table relocs for gc, we have to deal with
4433 all sorts of PIC-related relocations. We describe below the
4434 general plan on how to handle such relocations, even though we only
4435 collect information at this point, storing them in hash tables for
4436 perusal of later passes.
4438 32 relocations are propagated to the linker output when creating
4439 position-independent output. LO16 and HI16 relocations are not
4440 supposed to be encountered in this case.
4442 LABEL16 should always be resolvable by the linker, since it's only
4445 LABEL24, on the other hand, is used by calls. If it turns out that
4446 the target of a call is a dynamic symbol, a PLT entry must be
4447 created for it, which triggers the creation of a private function
4448 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4450 GPREL relocations require the referenced symbol to be in the same
4451 segment as _gp, but this can only be checked later.
4453 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4454 exist. LABEL24 might as well, since it may require a PLT entry,
4455 that will require a got.
4457 Non-FUNCDESC GOT relocations require a GOT entry to be created
4458 regardless of whether the symbol is dynamic. However, since a
4459 global symbol that turns out to not be exported may have the same
4460 address of a non-dynamic symbol, we don't assign GOT entries at
4461 this point, such that we can share them in this case. A relocation
4462 for the GOT entry always has to be created, be it to offset a
4463 private symbol by the section load address, be it to get the symbol
4464 resolved dynamically.
4466 FUNCDESC GOT relocations require a GOT entry to be created, and
4467 handled as if a FUNCDESC relocation was applied to the GOT entry in
4470 FUNCDESC relocations referencing a symbol that turns out to NOT be
4471 dynamic cause a private function descriptor to be created. The
4472 FUNCDESC relocation then decays to a 32 relocation that points at
4473 the private descriptor. If the symbol is dynamic, the FUNCDESC
4474 relocation is propagated to the linker output, such that the
4475 dynamic linker creates the canonical descriptor, pointing to the
4476 dynamically-resolved definition of the function.
4478 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4479 symbols that are assigned to the same segment as the GOT, but we
4480 can only check this later, after we know the complete set of
4481 symbols defined and/or exported.
4483 FUNCDESC GOTOFF relocations require a function descriptor to be
4484 created and, unless lazy binding is disabled or the symbol is not
4485 dynamic, a lazy PLT entry. Since we can't tell at this point
4486 whether a symbol is going to be dynamic, we have to decide later
4487 whether to create a lazy PLT entry or bind the descriptor directly
4488 to the private function.
4490 FUNCDESC_VALUE relocations are not supposed to be present in object
4491 files, but they may very well be simply propagated to the linker
4492 output, since they have no side effect.
4495 A function descriptor always requires a FUNCDESC_VALUE relocation.
4496 Whether it's in .plt.rel or not depends on whether lazy binding is
4497 enabled and on whether the referenced symbol is dynamic.
4499 The existence of a lazy PLT requires the resolverStub lazy PLT
4500 entry to be present.
4503 As for assignment of GOT, PLT and lazy PLT entries, and private
4504 descriptors, we might do them all sequentially, but we can do
4505 better than that. For example, we can place GOT entries and
4506 private function descriptors referenced using 12-bit operands
4507 closer to the PIC register value, such that these relocations don't
4508 overflow. Those that are only referenced with LO16 relocations
4509 could come next, but we may as well place PLT-required function
4510 descriptors in the 12-bit range to make them shorter. Symbols
4511 referenced with LO16/HI16 may come next, but we may place
4512 additional function descriptors in the 16-bit range if we can
4513 reliably tell that we've already placed entries that are ever
4514 referenced with only LO16. PLT entries are therefore generated as
4515 small as possible, while not introducing relocation overflows in
4516 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4517 generated before or after PLT entries, but not intermingled with
4518 them, such that we can have more lazy PLT entries in range for a
4519 branch to the resolverStub. The resolverStub should be emitted at
4520 the most distant location from the first lazy PLT entry such that
4521 it's still in range for a branch, or closer, if there isn't a need
4522 for so many lazy PLT entries. Additional lazy PLT entries may be
4523 emitted after the resolverStub, as long as branches are still in
4524 range. If the branch goes out of range, longer lazy PLT entries
4527 We could further optimize PLT and lazy PLT entries by giving them
4528 priority in assignment to closer-to-gr17 locations depending on the
4529 number of occurrences of references to them (assuming a function
4530 that's called more often is more important for performance, so its
4531 PLT entry should be faster), or taking hints from the compiler.
4532 Given infinite time and money... :-) */
4535 bfinfdpic_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4536 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4538 Elf_Internal_Shdr
*symtab_hdr
;
4539 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
4540 const Elf_Internal_Rela
*rel
;
4541 const Elf_Internal_Rela
*rel_end
;
4543 struct bfinfdpic_relocs_info
*picrel
;
4545 if (info
->relocatable
)
4548 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4549 sym_hashes
= elf_sym_hashes (abfd
);
4550 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
4551 if (!elf_bad_symtab (abfd
))
4552 sym_hashes_end
-= symtab_hdr
->sh_info
;
4554 dynobj
= elf_hash_table (info
)->dynobj
;
4555 rel_end
= relocs
+ sec
->reloc_count
;
4556 for (rel
= relocs
; rel
< rel_end
; rel
++)
4558 struct elf_link_hash_entry
*h
;
4559 unsigned long r_symndx
;
4561 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4562 if (r_symndx
< symtab_hdr
->sh_info
)
4565 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4567 switch (ELF32_R_TYPE (rel
->r_info
))
4569 case R_BFIN_GOT17M4
:
4572 case R_BFIN_FUNCDESC_GOT17M4
:
4573 case R_BFIN_FUNCDESC_GOTHI
:
4574 case R_BFIN_FUNCDESC_GOTLO
:
4575 case R_BFIN_GOTOFF17M4
:
4576 case R_BFIN_GOTOFFHI
:
4577 case R_BFIN_GOTOFFLO
:
4578 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4579 case R_BFIN_FUNCDESC_GOTOFFHI
:
4580 case R_BFIN_FUNCDESC_GOTOFFLO
:
4581 case R_BFIN_FUNCDESC
:
4582 case R_BFIN_FUNCDESC_VALUE
:
4583 if (! IS_FDPIC (abfd
))
4587 case R_pcrel24_jump_l
:
4589 if (IS_FDPIC (abfd
) && ! dynobj
)
4591 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4592 if (! _bfin_create_got_section (abfd
, info
))
4595 if (! IS_FDPIC (abfd
))
4602 if (h
->dynindx
== -1)
4603 switch (ELF_ST_VISIBILITY (h
->other
))
4609 bfd_elf_link_record_dynamic_symbol (info
, h
);
4613 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4615 rel
->r_addend
, INSERT
);
4618 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4619 (info
), abfd
, r_symndx
,
4620 rel
->r_addend
, INSERT
);
4630 switch (ELF32_R_TYPE (rel
->r_info
))
4633 case R_pcrel24_jump_l
:
4634 if (IS_FDPIC (abfd
))
4638 case R_BFIN_FUNCDESC_VALUE
:
4639 picrel
->relocsfdv
++;
4640 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4645 if (! IS_FDPIC (abfd
))
4649 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4653 case R_BFIN_GOT17M4
:
4654 picrel
->got17m4
= 1;
4659 picrel
->gothilo
= 1;
4662 case R_BFIN_FUNCDESC_GOT17M4
:
4663 picrel
->fdgot17m4
= 1;
4666 case R_BFIN_FUNCDESC_GOTHI
:
4667 case R_BFIN_FUNCDESC_GOTLO
:
4668 picrel
->fdgothilo
= 1;
4671 case R_BFIN_GOTOFF17M4
:
4672 case R_BFIN_GOTOFFHI
:
4673 case R_BFIN_GOTOFFLO
:
4677 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4678 picrel
->fdgoff17m4
= 1;
4681 case R_BFIN_FUNCDESC_GOTOFFHI
:
4682 case R_BFIN_FUNCDESC_GOTOFFLO
:
4683 picrel
->fdgoffhilo
= 1;
4686 case R_BFIN_FUNCDESC
:
4691 /* This relocation describes the C++ object vtable hierarchy.
4692 Reconstruct it for later use during GC. */
4693 case R_BFIN_GNU_VTINHERIT
:
4694 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4698 /* This relocation describes which C++ vtable entries are actually
4699 used. Record for later use during GC. */
4700 case R_BFIN_GNU_VTENTRY
:
4701 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4707 case R_pcrel12_jump_s
:
4713 (*_bfd_error_handler
)
4714 (_("%B: unsupported relocation type %i"),
4715 abfd
, ELF32_R_TYPE (rel
->r_info
));
4723 /* Set the right machine number for a Blackfin ELF file. */
4726 elf32_bfin_object_p (bfd
*abfd
)
4728 bfd_default_set_arch_mach (abfd
, bfd_arch_bfin
, 0);
4729 return (((elf_elfheader (abfd
)->e_flags
& EF_BFIN_FDPIC
) != 0)
4730 == (IS_FDPIC (abfd
)));
4734 elf32_bfin_set_private_flags (bfd
* abfd
, flagword flags
)
4736 elf_elfheader (abfd
)->e_flags
= flags
;
4737 elf_flags_init (abfd
) = TRUE
;
4741 /* Copy backend specific data from one object module to another. */
4744 bfin_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4746 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4747 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4750 BFD_ASSERT (!elf_flags_init (obfd
)
4751 || elf_elfheader (obfd
)->e_flags
== elf_elfheader (ibfd
)->e_flags
);
4753 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
4754 elf_flags_init (obfd
) = TRUE
;
4759 elf32_bfinfdpic_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4763 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4764 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4767 if (! bfin_elf_copy_private_bfd_data (ibfd
, obfd
))
4770 if (! elf_tdata (ibfd
) || ! elf_tdata (ibfd
)->phdr
4771 || ! elf_tdata (obfd
) || ! elf_tdata (obfd
)->phdr
)
4774 /* Copy the stack size. */
4775 for (i
= 0; i
< elf_elfheader (ibfd
)->e_phnum
; i
++)
4776 if (elf_tdata (ibfd
)->phdr
[i
].p_type
== PT_GNU_STACK
)
4778 Elf_Internal_Phdr
*iphdr
= &elf_tdata (ibfd
)->phdr
[i
];
4780 for (i
= 0; i
< elf_elfheader (obfd
)->e_phnum
; i
++)
4781 if (elf_tdata (obfd
)->phdr
[i
].p_type
== PT_GNU_STACK
)
4783 memcpy (&elf_tdata (obfd
)->phdr
[i
], iphdr
, sizeof (*iphdr
));
4785 /* Rewrite the phdrs, since we're only called after they
4786 were first written. */
4787 if (bfd_seek (obfd
, (bfd_signed_vma
) get_elf_backend_data (obfd
)
4788 ->s
->sizeof_ehdr
, SEEK_SET
) != 0
4789 || get_elf_backend_data (obfd
)->s
4790 ->write_out_phdrs (obfd
, elf_tdata (obfd
)->phdr
,
4791 elf_elfheader (obfd
)->e_phnum
) != 0)
4803 /* Display the flags field. */
4805 elf32_bfin_print_private_bfd_data (bfd
* abfd
, PTR ptr
)
4807 FILE *file
= (FILE *) ptr
;
4810 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
4812 /* Print normal ELF private data. */
4813 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
4815 flags
= elf_elfheader (abfd
)->e_flags
;
4817 /* xgettext:c-format */
4818 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
4820 if (flags
& EF_BFIN_PIC
)
4821 fprintf (file
, " -fpic");
4823 if (flags
& EF_BFIN_FDPIC
)
4824 fprintf (file
, " -mfdpic");
4831 /* Merge backend specific data from an object file to the output
4832 object file when linking. */
4835 elf32_bfin_merge_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4837 flagword old_flags
, old_partial
;
4838 flagword new_flags
, new_partial
;
4839 bfd_boolean error
= FALSE
;
4841 new_flags
= elf_elfheader (ibfd
)->e_flags
;
4842 old_flags
= elf_elfheader (obfd
)->e_flags
;
4844 if (new_flags
& EF_BFIN_FDPIC
)
4845 new_flags
&= ~EF_BFIN_PIC
;
4848 (*_bfd_error_handler
) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4849 old_flags
, new_flags
, elf_flags_init (obfd
) ? "yes" : "no",
4850 bfd_get_filename (ibfd
));
4853 if (!elf_flags_init (obfd
)) /* First call, no flags set. */
4855 elf_flags_init (obfd
) = TRUE
;
4856 old_flags
= new_flags
;
4859 else if (new_flags
== old_flags
) /* Compatible flags are ok. */
4862 else /* Possibly incompatible flags. */
4864 /* We don't have to do anything if the pic flags are the same, or the new
4865 module(s) were compiled with -mlibrary-pic. */
4866 new_partial
= (new_flags
& EF_BFIN_PIC_FLAGS
);
4867 old_partial
= (old_flags
& EF_BFIN_PIC_FLAGS
);
4868 if (new_partial
== old_partial
)
4871 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
4872 else if (new_partial
!= 0 && old_partial
!= 0)
4873 old_flags
|= new_partial
;
4875 /* One module was compiled for pic and the other was not, see if we have
4876 had any relocations that are not pic-safe. */
4878 old_flags
|= new_partial
;
4882 /* Update the old flags now with changes made above. */
4883 elf_elfheader (obfd
)->e_flags
= old_flags
;
4885 if (((new_flags
& EF_BFIN_FDPIC
) == 0)
4886 != (! IS_FDPIC (ibfd
)))
4889 if (IS_FDPIC (obfd
))
4890 (*_bfd_error_handler
)
4891 (_("%s: cannot link non-fdpic object file into fdpic executable"),
4892 bfd_get_filename (ibfd
));
4894 (*_bfd_error_handler
)
4895 (_("%s: cannot link fdpic object file into non-fdpic executable"),
4896 bfd_get_filename (ibfd
));
4900 bfd_set_error (bfd_error_bad_value
);
4905 /* bfin ELF linker hash entry. */
4907 struct bfin_link_hash_entry
4909 struct elf_link_hash_entry root
;
4911 /* Number of PC relative relocs copied for this symbol. */
4912 struct bfin_pcrel_relocs_copied
*pcrel_relocs_copied
;
4915 /* bfin ELF linker hash table. */
4917 struct bfin_link_hash_table
4919 struct elf_link_hash_table root
;
4921 /* Small local sym to section mapping cache. */
4922 struct sym_sec_cache sym_sec
;
4925 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4927 static struct bfd_hash_entry
*
4928 bfin_link_hash_newfunc (struct bfd_hash_entry
*entry
,
4929 struct bfd_hash_table
*table
, const char *string
)
4931 struct bfd_hash_entry
*ret
= entry
;
4933 /* Allocate the structure if it has not already been allocated by a
4936 ret
= bfd_hash_allocate (table
, sizeof (struct bfin_link_hash_entry
));
4940 /* Call the allocation method of the superclass. */
4941 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
4943 bfin_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
4948 /* Create an bfin ELF linker hash table. */
4950 static struct bfd_link_hash_table
*
4951 bfin_link_hash_table_create (bfd
* abfd
)
4953 struct bfin_link_hash_table
*ret
;
4954 bfd_size_type amt
= sizeof (struct bfin_link_hash_table
);
4956 ret
= bfd_zalloc (abfd
, amt
);
4960 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
4961 bfin_link_hash_newfunc
,
4962 sizeof (struct elf_link_hash_entry
)))
4968 ret
->sym_sec
.abfd
= NULL
;
4970 return &ret
->root
.root
;
4973 /* The size in bytes of an entry in the procedure linkage table. */
4975 /* Finish up the dynamic sections. */
4978 bfin_finish_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4979 struct bfd_link_info
*info
)
4984 dynobj
= elf_hash_table (info
)->dynobj
;
4986 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4988 if (elf_hash_table (info
)->dynamic_sections_created
)
4990 Elf32_External_Dyn
*dyncon
, *dynconend
;
4992 BFD_ASSERT (sdyn
!= NULL
);
4994 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4995 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4996 for (; dyncon
< dynconend
; dyncon
++)
4998 Elf_Internal_Dyn dyn
;
5000 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5008 /* Finish up dynamic symbol handling. We set the contents of various
5009 dynamic sections here. */
5012 bfin_finish_dynamic_symbol (bfd
* output_bfd
,
5013 struct bfd_link_info
*info
,
5014 struct elf_link_hash_entry
*h
,
5015 Elf_Internal_Sym
* sym
)
5019 dynobj
= elf_hash_table (info
)->dynobj
;
5021 if (h
->got
.offset
!= (bfd_vma
) - 1)
5025 Elf_Internal_Rela rela
;
5028 /* This symbol has an entry in the global offset table.
5031 sgot
= bfd_get_section_by_name (dynobj
, ".got");
5032 srela
= bfd_get_section_by_name (dynobj
, ".rela.got");
5033 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
5035 rela
.r_offset
= (sgot
->output_section
->vma
5036 + sgot
->output_offset
5037 + (h
->got
.offset
& ~(bfd_vma
) 1));
5039 /* If this is a -Bsymbolic link, and the symbol is defined
5040 locally, we just want to emit a RELATIVE reloc. Likewise if
5041 the symbol was forced to be local because of a version file.
5042 The entry in the global offset table will already have been
5043 initialized in the relocate_section function. */
5046 || h
->dynindx
== -1 || h
->forced_local
) && h
->def_regular
)
5048 fprintf(stderr
, "*** check this relocation %s\n", __FUNCTION__
);
5049 rela
.r_info
= ELF32_R_INFO (0, R_pcrel24
);
5050 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
5054 offset
& ~(bfd_vma
) 1)));
5058 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5059 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
5060 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_got
);
5064 loc
= srela
->contents
;
5065 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
5066 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
5073 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5074 if (strcmp (h
->root
.root
.string
, "__DYNAMIC") == 0
5075 || h
== elf_hash_table (info
)->hgot
)
5076 sym
->st_shndx
= SHN_ABS
;
5081 /* Adjust a symbol defined by a dynamic object and referenced by a
5082 regular object. The current definition is in some section of the
5083 dynamic object, but we're not including those sections. We have to
5084 change the definition to something the rest of the link can
5088 bfin_adjust_dynamic_symbol (struct bfd_link_info
*info
,
5089 struct elf_link_hash_entry
*h
)
5093 unsigned int power_of_two
;
5095 dynobj
= elf_hash_table (info
)->dynobj
;
5097 /* Make sure we know what is going on here. */
5098 BFD_ASSERT (dynobj
!= NULL
5100 || h
->u
.weakdef
!= NULL
5101 || (h
->def_dynamic
&& h
->ref_regular
&& !h
->def_regular
)));
5103 /* If this is a function, put it in the procedure linkage table. We
5104 will fill in the contents of the procedure linkage table later,
5105 when we know the address of the .got section. */
5106 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
5111 /* If this is a weak symbol, and there is a real definition, the
5112 processor independent code will have arranged for us to see the
5113 real definition first, and we can just use the same value. */
5114 if (h
->u
.weakdef
!= NULL
)
5116 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
5117 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
5118 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
5119 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
5123 /* This is a reference to a symbol defined by a dynamic object which
5124 is not a function. */
5126 /* If we are creating a shared library, we must presume that the
5127 only references to the symbol are via the global offset table.
5128 For such cases we need not do anything here; the relocations will
5129 be handled correctly by relocate_section. */
5133 /* We must allocate the symbol in our .dynbss section, which will
5134 become part of the .bss section of the executable. There will be
5135 an entry for this symbol in the .dynsym section. The dynamic
5136 object will contain position independent code, so all references
5137 from the dynamic object to this symbol will go through the global
5138 offset table. The dynamic linker will use the .dynsym entry to
5139 determine the address it must put in the global offset table, so
5140 both the dynamic object and the regular object will refer to the
5141 same memory location for the variable. */
5143 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
5144 BFD_ASSERT (s
!= NULL
);
5146 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5147 copy the initial value out of the dynamic object and into the
5148 runtime process image. We need to remember the offset into the
5149 .rela.bss section we are going to use. */
5150 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5154 srel
= bfd_get_section_by_name (dynobj
, ".rela.bss");
5155 BFD_ASSERT (srel
!= NULL
);
5156 srel
->size
+= sizeof (Elf32_External_Rela
);
5160 /* We need to figure out the alignment required for this symbol. I
5161 have no idea how ELF linkers handle this. */
5162 power_of_two
= bfd_log2 (h
->size
);
5163 if (power_of_two
> 3)
5166 /* Apply the required alignment. */
5167 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
5168 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
5170 if (!bfd_set_section_alignment (dynobj
, s
, power_of_two
))
5174 /* Define the symbol as being at this point in the section. */
5175 h
->root
.u
.def
.section
= s
;
5176 h
->root
.u
.def
.value
= s
->size
;
5178 /* Increment the section size to make room for the symbol. */
5184 /* The bfin linker needs to keep track of the number of relocs that it
5185 decides to copy in check_relocs for each symbol. This is so that it
5186 can discard PC relative relocs if it doesn't need them when linking
5187 with -Bsymbolic. We store the information in a field extending the
5188 regular ELF linker hash table. */
5190 /* This structure keeps track of the number of PC relative relocs we have
5191 copied for a given symbol. */
5193 struct bfin_pcrel_relocs_copied
5196 struct bfin_pcrel_relocs_copied
*next
;
5197 /* A section in dynobj. */
5199 /* Number of relocs copied in this section. */
5200 bfd_size_type count
;
5203 /* This function is called via elf_link_hash_traverse if we are
5204 creating a shared object. In the -Bsymbolic case it discards the
5205 space allocated to copy PC relative relocs against symbols which
5206 are defined in regular objects. For the normal shared case, it
5207 discards space for pc-relative relocs that have become local due to
5208 symbol visibility changes. We allocated space for them in the
5209 check_relocs routine, but we won't fill them in in the
5210 relocate_section routine.
5212 We also check whether any of the remaining relocations apply
5213 against a readonly section, and set the DF_TEXTREL flag in this
5217 bfin_discard_copies (struct elf_link_hash_entry
*h
, PTR inf
)
5219 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5220 struct bfin_pcrel_relocs_copied
*s
;
5222 if (h
->root
.type
== bfd_link_hash_warning
)
5223 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5225 if (!h
->def_regular
|| (!info
->symbolic
&& !h
->forced_local
))
5227 if ((info
->flags
& DF_TEXTREL
) == 0)
5229 /* Look for relocations against read-only sections. */
5230 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5231 s
!= NULL
; s
= s
->next
)
5232 if ((s
->section
->flags
& SEC_READONLY
) != 0)
5234 info
->flags
|= DF_TEXTREL
;
5242 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5243 s
!= NULL
; s
= s
->next
)
5244 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
5250 bfin_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
5251 struct bfd_link_info
*info
)
5257 dynobj
= elf_hash_table (info
)->dynobj
;
5258 BFD_ASSERT (dynobj
!= NULL
);
5260 if (elf_hash_table (info
)->dynamic_sections_created
)
5262 /* Set the contents of the .interp section to the interpreter. */
5263 if (info
->executable
)
5265 s
= bfd_get_section_by_name (dynobj
, ".interp");
5266 BFD_ASSERT (s
!= NULL
);
5267 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5268 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5273 /* We may have created entries in the .rela.got section.
5274 However, if we are not creating the dynamic sections, we will
5275 not actually use these entries. Reset the size of .rela.got,
5276 which will cause it to get stripped from the output file
5278 s
= bfd_get_section_by_name (dynobj
, ".rela.got");
5283 /* If this is a -Bsymbolic shared link, then we need to discard all
5284 PC relative relocs against symbols defined in a regular object.
5285 For the normal shared case we discard the PC relative relocs
5286 against symbols that have become local due to visibility changes.
5287 We allocated space for them in the check_relocs routine, but we
5288 will not fill them in in the relocate_section routine. */
5290 elf_link_hash_traverse (elf_hash_table (info
),
5291 bfin_discard_copies
, (PTR
) info
);
5293 /* The check_relocs and adjust_dynamic_symbol entry points have
5294 determined the sizes of the various dynamic sections. Allocate
5297 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5302 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5305 /* It's OK to base decisions on the section name, because none
5306 of the dynobj section names depend upon the input files. */
5307 name
= bfd_get_section_name (dynobj
, s
);
5311 if (strncmp (name
, ".rela", 5) == 0)
5315 /* If we don't need this section, strip it from the
5316 output file. This is mostly to handle .rela.bss and
5317 .rela.plt. We must create both sections in
5318 create_dynamic_sections, because they must be created
5319 before the linker maps input sections to output
5320 sections. The linker does that before
5321 adjust_dynamic_symbol is called, and it is that
5322 function which decides whether anything needs to go
5323 into these sections. */
5330 /* We use the reloc_count field as a counter if we need
5331 to copy relocs into the output file. */
5335 else if (strncmp (name
, ".got", 4) != 0)
5337 /* It's not one of our sections, so don't allocate space. */
5343 s
->flags
|= SEC_EXCLUDE
;
5347 /* Allocate memory for the section contents. */
5348 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5349 Unused entries should be reclaimed before the section's contents
5350 are written out, but at the moment this does not happen. Thus in
5351 order to prevent writing out garbage, we initialise the section's
5352 contents to zero. */
5353 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
5354 if (s
->contents
== NULL
&& s
->size
!= 0)
5358 if (elf_hash_table (info
)->dynamic_sections_created
)
5360 /* Add some entries to the .dynamic section. We fill in the
5361 values later, in bfin_finish_dynamic_sections, but we
5362 must add the entries now so that we get the correct size for
5363 the .dynamic section. The DT_DEBUG entry is filled in by the
5364 dynamic linker and used by the debugger. */
5365 #define add_dynamic_entry(TAG, VAL) \
5366 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5370 if (!add_dynamic_entry (DT_DEBUG
, 0))
5377 if (!add_dynamic_entry (DT_RELA
, 0)
5378 || !add_dynamic_entry (DT_RELASZ
, 0)
5379 || !add_dynamic_entry (DT_RELAENT
,
5380 sizeof (Elf32_External_Rela
)))
5384 if ((info
->flags
& DF_TEXTREL
) != 0)
5386 if (!add_dynamic_entry (DT_TEXTREL
, 0))
5390 #undef add_dynamic_entry
5395 /* Given a .data section and a .emreloc in-memory section, store
5396 relocation information into the .emreloc section which can be
5397 used at runtime to relocate the section. This is called by the
5398 linker when the --embedded-relocs switch is used. This is called
5399 after the add_symbols entry point has been called for all the
5400 objects, and before the final_link entry point is called. */
5402 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5403 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*, asection
*, char **));
5406 bfd_bfin_elf32_create_embedded_relocs (
5408 struct bfd_link_info
*info
,
5413 Elf_Internal_Shdr
*symtab_hdr
;
5414 Elf_Internal_Sym
*isymbuf
= NULL
;
5415 Elf_Internal_Rela
*internal_relocs
= NULL
;
5416 Elf_Internal_Rela
*irel
, *irelend
;
5420 BFD_ASSERT (! info
->relocatable
);
5424 if (datasec
->reloc_count
== 0)
5427 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5429 /* Get a copy of the native relocations. */
5430 internal_relocs
= (_bfd_elf_link_read_relocs
5431 (abfd
, datasec
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
5432 info
->keep_memory
));
5433 if (internal_relocs
== NULL
)
5436 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
5437 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
5438 if (relsec
->contents
== NULL
)
5441 p
= relsec
->contents
;
5443 irelend
= internal_relocs
+ datasec
->reloc_count
;
5444 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
5446 asection
*targetsec
;
5448 /* We are going to write a four byte longword into the runtime
5449 reloc section. The longword will be the address in the data
5450 section which must be relocated. It is followed by the name
5451 of the target section NUL-padded or truncated to 8
5454 /* We can only relocate absolute longword relocs at run time. */
5455 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_byte4_data
)
5457 *errmsg
= _("unsupported reloc type");
5458 bfd_set_error (bfd_error_bad_value
);
5462 /* Get the target section referred to by the reloc. */
5463 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
5465 /* A local symbol. */
5466 Elf_Internal_Sym
*isym
;
5468 /* Read this BFD's local symbols if we haven't done so already. */
5469 if (isymbuf
== NULL
)
5471 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5472 if (isymbuf
== NULL
)
5473 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
5474 symtab_hdr
->sh_info
, 0,
5476 if (isymbuf
== NULL
)
5480 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
5481 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5486 struct elf_link_hash_entry
*h
;
5488 /* An external symbol. */
5489 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
5490 h
= elf_sym_hashes (abfd
)[indx
];
5491 BFD_ASSERT (h
!= NULL
);
5492 if (h
->root
.type
== bfd_link_hash_defined
5493 || h
->root
.type
== bfd_link_hash_defweak
)
5494 targetsec
= h
->root
.u
.def
.section
;
5499 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
5500 memset (p
+ 4, 0, 8);
5501 if (targetsec
!= NULL
)
5502 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
5505 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5507 if (internal_relocs
!= NULL
5508 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5509 free (internal_relocs
);
5513 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5515 if (internal_relocs
!= NULL
5516 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5517 free (internal_relocs
);
5521 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5522 #define TARGET_LITTLE_NAME "elf32-bfin"
5523 #define ELF_ARCH bfd_arch_bfin
5524 #define ELF_MACHINE_CODE EM_BLACKFIN
5525 #define ELF_MAXPAGESIZE 0x1000
5526 #define elf_symbol_leading_char '_'
5528 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5529 #define elf_info_to_howto bfin_info_to_howto
5530 #define elf_info_to_howto_rel 0
5531 #define elf_backend_object_p elf32_bfin_object_p
5533 #define bfd_elf32_bfd_is_local_label_name \
5534 bfin_is_local_label_name
5535 #define bfin_hash_table(p) \
5536 ((struct bfin_link_hash_table *) (p)->hash)
5540 #define elf_backend_create_dynamic_sections \
5541 _bfd_elf_create_dynamic_sections
5542 #define bfd_elf32_bfd_link_hash_table_create \
5543 bfin_link_hash_table_create
5544 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5546 #define elf_backend_check_relocs bfin_check_relocs
5547 #define elf_backend_adjust_dynamic_symbol \
5548 bfin_adjust_dynamic_symbol
5549 #define elf_backend_size_dynamic_sections \
5550 bfin_size_dynamic_sections
5551 #define elf_backend_relocate_section bfin_relocate_section
5552 #define elf_backend_finish_dynamic_symbol \
5553 bfin_finish_dynamic_symbol
5554 #define elf_backend_finish_dynamic_sections \
5555 bfin_finish_dynamic_sections
5556 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5557 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5558 #define bfd_elf32_bfd_merge_private_bfd_data \
5559 elf32_bfin_merge_private_bfd_data
5560 #define bfd_elf32_bfd_set_private_flags \
5561 elf32_bfin_set_private_flags
5562 #define bfd_elf32_bfd_print_private_bfd_data \
5563 elf32_bfin_print_private_bfd_data
5564 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5565 #define elf_backend_can_gc_sections 1
5566 #define elf_backend_can_refcount 1
5567 #define elf_backend_want_got_plt 0
5568 #define elf_backend_plt_readonly 1
5569 #define elf_backend_want_plt_sym 0
5570 #define elf_backend_got_header_size 12
5571 #define elf_backend_rela_normal 1
5573 #include "elf32-target.h"
5575 #undef TARGET_LITTLE_SYM
5576 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5577 #undef TARGET_LITTLE_NAME
5578 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5580 #define elf32_bed elf32_bfinfdpic_bed
5582 #undef elf_backend_gc_sweep_hook
5583 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5585 #undef elf_backend_got_header_size
5586 #define elf_backend_got_header_size 0
5588 #undef elf_backend_relocate_section
5589 #define elf_backend_relocate_section bfinfdpic_relocate_section
5590 #undef elf_backend_check_relocs
5591 #define elf_backend_check_relocs bfinfdpic_check_relocs
5593 #undef bfd_elf32_bfd_link_hash_table_create
5594 #define bfd_elf32_bfd_link_hash_table_create \
5595 bfinfdpic_elf_link_hash_table_create
5596 #undef elf_backend_always_size_sections
5597 #define elf_backend_always_size_sections \
5598 elf32_bfinfdpic_always_size_sections
5599 #undef elf_backend_modify_segment_map
5600 #define elf_backend_modify_segment_map \
5601 elf32_bfinfdpic_modify_segment_map
5602 #undef bfd_elf32_bfd_copy_private_bfd_data
5603 #define bfd_elf32_bfd_copy_private_bfd_data \
5604 elf32_bfinfdpic_copy_private_bfd_data
5606 #undef elf_backend_create_dynamic_sections
5607 #define elf_backend_create_dynamic_sections \
5608 elf32_bfinfdpic_create_dynamic_sections
5609 #undef elf_backend_adjust_dynamic_symbol
5610 #define elf_backend_adjust_dynamic_symbol \
5611 elf32_bfinfdpic_adjust_dynamic_symbol
5612 #undef elf_backend_size_dynamic_sections
5613 #define elf_backend_size_dynamic_sections \
5614 elf32_bfinfdpic_size_dynamic_sections
5615 #undef elf_backend_finish_dynamic_symbol
5616 #define elf_backend_finish_dynamic_symbol \
5617 elf32_bfinfdpic_finish_dynamic_symbol
5618 #undef elf_backend_finish_dynamic_sections
5619 #define elf_backend_finish_dynamic_sections \
5620 elf32_bfinfdpic_finish_dynamic_sections
5622 #undef elf_backend_can_make_relative_eh_frame
5623 #define elf_backend_can_make_relative_eh_frame \
5624 bfinfdpic_elf_use_relative_eh_frame
5625 #undef elf_backend_can_make_lsda_relative_eh_frame
5626 #define elf_backend_can_make_lsda_relative_eh_frame \
5627 bfinfdpic_elf_use_relative_eh_frame
5628 #undef elf_backend_encode_eh_address
5629 #define elf_backend_encode_eh_address \
5630 bfinfdpic_elf_encode_eh_address
5632 #undef elf_backend_may_use_rel_p
5633 #define elf_backend_may_use_rel_p 1
5634 #undef elf_backend_may_use_rela_p
5635 #define elf_backend_may_use_rela_p 1
5636 /* We use REL for dynamic relocations only. */
5637 #undef elf_backend_default_use_rela_p
5638 #define elf_backend_default_use_rela_p 1
5640 #undef elf_backend_omit_section_dynsym
5641 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5643 #include "elf32-target.h"