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 ? entry
->d
.h
->root
.root
.hash
1288 : entry
->symndx
+ 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
))
2438 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2442 info
->callbacks
->warning
2444 _("cannot emit dynamic relocations in read-only section"),
2445 name
, input_bfd
, input_section
, rel
->r_offset
);
2448 _bfinfdpic_add_dyn_reloc (output_bfd
,
2449 bfinfdpic_gotrel_section (info
),
2450 _bfd_elf_section_offset
2452 input_section
, rel
->r_offset
)
2454 ->output_section
->vma
2455 + input_section
->output_offset
,
2456 r_type
, dynindx
, addend
, picrel
);
2459 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2462 /* We want the addend in-place because dynamic
2463 relocations are REL. Setting relocation to it should
2464 arrange for it to be installed. */
2465 relocation
= addend
- rel
->r_addend
;
2467 check_segment
[0] = check_segment
[1] = got_segment
;
2471 if (! IS_FDPIC (output_bfd
))
2473 check_segment
[0] = check_segment
[1] = -1;
2477 case R_BFIN_FUNCDESC_VALUE
:
2480 bfd_vma addend
= rel
->r_addend
;
2482 /* If the symbol is dynamic but binds locally, use
2484 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2486 if (addend
&& r_type
== R_BFIN_FUNCDESC_VALUE
)
2488 info
->callbacks
->warning
2489 (info
, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2490 name
, input_bfd
, input_section
, rel
->r_offset
);
2493 dynindx
= h
->dynindx
;
2498 addend
+= h
->root
.u
.def
.value
;
2500 addend
+= sym
->st_value
;
2502 addend
+= osec
->output_offset
;
2503 if (osec
&& osec
->output_section
2504 && ! bfd_is_abs_section (osec
->output_section
)
2505 && ! bfd_is_und_section (osec
->output_section
))
2506 dynindx
= elf_section_data (osec
->output_section
)->dynindx
;
2511 /* If we're linking an executable at a fixed address, we
2512 can omit the dynamic relocation as long as the symbol
2513 is defined in the current link unit (which is implied
2514 by its output section not being NULL). */
2515 if (info
->executable
&& !info
->pie
2516 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2519 addend
+= osec
->output_section
->vma
;
2520 if (IS_FDPIC (input_bfd
)
2521 && (bfd_get_section_flags (output_bfd
,
2522 input_section
->output_section
)
2523 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2525 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2529 info
->callbacks
->warning
2531 _("cannot emit fixups in read-only section"),
2532 name
, input_bfd
, input_section
, rel
->r_offset
);
2535 if (!h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2537 _bfinfdpic_add_rofixup (output_bfd
,
2538 bfinfdpic_gotfixup_section
2540 _bfd_elf_section_offset
2542 input_section
, rel
->r_offset
)
2544 ->output_section
->vma
2545 + input_section
->output_offset
,
2547 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2548 _bfinfdpic_add_rofixup
2550 bfinfdpic_gotfixup_section (info
),
2551 _bfd_elf_section_offset
2553 input_section
, rel
->r_offset
)
2554 + input_section
->output_section
->vma
2555 + input_section
->output_offset
+ 4, picrel
);
2561 if ((bfd_get_section_flags (output_bfd
,
2562 input_section
->output_section
)
2563 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2565 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2569 info
->callbacks
->warning
2571 _("cannot emit dynamic relocations in read-only section"),
2572 name
, input_bfd
, input_section
, rel
->r_offset
);
2575 _bfinfdpic_add_dyn_reloc (output_bfd
,
2576 bfinfdpic_gotrel_section (info
),
2577 _bfd_elf_section_offset
2579 input_section
, rel
->r_offset
)
2581 ->output_section
->vma
2582 + input_section
->output_offset
,
2583 r_type
, dynindx
, addend
, picrel
);
2586 addend
+= osec
->output_section
->vma
;
2587 /* We want the addend in-place because dynamic
2588 relocations are REL. Setting relocation to it
2589 should arrange for it to be installed. */
2590 relocation
= addend
- rel
->r_addend
;
2593 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2595 /* If we've omitted the dynamic relocation, just emit
2596 the fixed addresses of the symbol and of the local
2598 if (info
->executable
&& !info
->pie
2599 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2600 bfd_put_32 (output_bfd
,
2601 bfinfdpic_got_section (info
)->output_section
->vma
2602 + bfinfdpic_got_section (info
)->output_offset
2603 + bfinfdpic_got_initial_offset (info
),
2604 contents
+ rel
->r_offset
+ 4);
2606 /* A function descriptor used for lazy or local
2607 resolving is initialized such that its high word
2608 contains the output section index in which the
2609 PLT entries are located, and the low word
2610 contains the offset of the lazy PLT entry entry
2611 point into that section. */
2612 bfd_put_32 (output_bfd
,
2613 h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2615 : _bfinfdpic_osec_to_segment (output_bfd
,
2618 contents
+ rel
->r_offset
+ 4);
2621 check_segment
[0] = check_segment
[1] = got_segment
;
2625 check_segment
[0] = isec_segment
;
2626 check_segment
[1] = sec
2627 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2632 if (check_segment
[0] != check_segment
[1] && IS_FDPIC (output_bfd
))
2634 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
2635 in the ld testsuite. */
2636 /* This helps catch problems in GCC while we can't do more
2637 than static linking. The idea is to test whether the
2638 input file basename is crt0.o only once. */
2639 if (silence_segment_error
== 1)
2640 silence_segment_error
=
2641 (strlen (input_bfd
->filename
) == 6
2642 && strcmp (input_bfd
->filename
, "crt0.o") == 0)
2643 || (strlen (input_bfd
->filename
) > 6
2644 && strcmp (input_bfd
->filename
2645 + strlen (input_bfd
->filename
) - 7,
2649 if (!silence_segment_error
2650 /* We don't want duplicate errors for undefined
2652 && !(picrel
&& picrel
->symndx
== -1
2653 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefined
))
2654 info
->callbacks
->warning
2656 (info
->shared
|| info
->pie
)
2657 ? _("relocations between different segments are not supported")
2658 : _("warning: relocation references a different segment"),
2659 name
, input_bfd
, input_section
, rel
->r_offset
);
2660 if (!silence_segment_error
&& (info
->shared
|| info
->pie
))
2662 elf_elfheader (output_bfd
)->e_flags
|= EF_BFIN_PIC
;
2667 case R_BFIN_GOTOFFHI
:
2668 /* We need the addend to be applied before we shift the
2670 relocation
+= rel
->r_addend
;
2673 case R_BFIN_FUNCDESC_GOTHI
:
2674 case R_BFIN_FUNCDESC_GOTOFFHI
:
2679 case R_BFIN_FUNCDESC_GOTLO
:
2680 case R_BFIN_GOTOFFLO
:
2681 case R_BFIN_FUNCDESC_GOTOFFLO
:
2682 relocation
&= 0xffff;
2692 case R_pcrel24_jump_l
:
2693 if (! IS_FDPIC (output_bfd
) || ! picrel
->plt
)
2697 /* When referencing a GOT entry, a function descriptor or a
2698 PLT, we don't want the addend to apply to the reference,
2699 but rather to the referenced symbol. The actual entry
2700 will have already been created taking the addend into
2701 account, so cancel it out here. */
2702 case R_BFIN_GOT17M4
:
2705 case R_BFIN_FUNCDESC_GOT17M4
:
2706 case R_BFIN_FUNCDESC_GOTHI
:
2707 case R_BFIN_FUNCDESC_GOTLO
:
2708 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2709 case R_BFIN_FUNCDESC_GOTOFFHI
:
2710 case R_BFIN_FUNCDESC_GOTOFFLO
:
2711 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
2712 here, since we do want to apply the addend to the others.
2713 Note that we've applied the addend to GOTOFFHI before we
2714 shifted it right. */
2715 case R_BFIN_GOTOFFHI
:
2716 relocation
-= rel
->r_addend
;
2723 if (r_type
== R_pcrel24
2724 || r_type
== R_pcrel24_jump_l
)
2727 bfd_vma address
= rel
->r_offset
;
2729 relocation
+= rel
->r_addend
;
2731 /* Perform usual pc-relative correction. */
2732 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
2733 relocation
-= address
;
2735 /* We are getting reloc_entry->address 2 byte off from
2736 the start of instruction. Assuming absolute postion
2737 of the reloc data. But, following code had been written assuming
2738 reloc address is starting at begining of instruction.
2739 To compensate that I have increased the value of
2740 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
2747 x
= bfd_get_16 (input_bfd
, contents
+ address
);
2748 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
2749 bfd_put_16 (input_bfd
, x
, contents
+ address
);
2751 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
2752 x
= relocation
& 0xFFFF;
2753 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
2757 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2758 contents
, rel
->r_offset
,
2759 relocation
, rel
->r_addend
);
2761 if (r
!= bfd_reloc_ok
)
2763 const char * msg
= (const char *) NULL
;
2767 case bfd_reloc_overflow
:
2768 r
= info
->callbacks
->reloc_overflow
2769 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
2770 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
2773 case bfd_reloc_undefined
:
2774 r
= info
->callbacks
->undefined_symbol
2775 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
2778 case bfd_reloc_outofrange
:
2779 msg
= _("internal error: out of range error");
2782 case bfd_reloc_notsupported
:
2783 msg
= _("internal error: unsupported relocation error");
2786 case bfd_reloc_dangerous
:
2787 msg
= _("internal error: dangerous relocation");
2791 msg
= _("internal error: unknown error");
2796 r
= info
->callbacks
->warning
2797 (info
, msg
, name
, input_bfd
, input_section
, rel
->r_offset
);
2808 bfin_relocate_section (bfd
* output_bfd
,
2809 struct bfd_link_info
*info
,
2811 asection
* input_section
,
2812 bfd_byte
* contents
,
2813 Elf_Internal_Rela
* relocs
,
2814 Elf_Internal_Sym
* local_syms
,
2815 asection
** local_sections
)
2818 Elf_Internal_Shdr
*symtab_hdr
;
2819 struct elf_link_hash_entry
**sym_hashes
;
2820 bfd_vma
*local_got_offsets
;
2823 Elf_Internal_Rela
*rel
;
2824 Elf_Internal_Rela
*relend
;
2827 if (info
->relocatable
)
2830 dynobj
= elf_hash_table (info
)->dynobj
;
2831 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2832 sym_hashes
= elf_sym_hashes (input_bfd
);
2833 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2839 relend
= relocs
+ input_section
->reloc_count
;
2840 for (; rel
< relend
; rel
++, i
++)
2843 reloc_howto_type
*howto
;
2844 unsigned long r_symndx
;
2845 struct elf_link_hash_entry
*h
;
2846 Elf_Internal_Sym
*sym
;
2848 bfd_vma relocation
= 0;
2849 bfd_boolean unresolved_reloc
;
2850 bfd_reloc_status_type r
;
2853 r_type
= ELF32_R_TYPE (rel
->r_info
);
2854 if (r_type
< 0 || r_type
>= 243)
2856 bfd_set_error (bfd_error_bad_value
);
2860 if (r_type
== R_BFIN_GNU_VTENTRY
2861 || r_type
== R_BFIN_GNU_VTINHERIT
)
2864 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2867 bfd_set_error (bfd_error_bad_value
);
2870 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2875 unresolved_reloc
= FALSE
;
2877 if (r_symndx
< symtab_hdr
->sh_info
)
2879 sym
= local_syms
+ r_symndx
;
2880 sec
= local_sections
[r_symndx
];
2881 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2887 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2888 r_symndx
, symtab_hdr
, sym_hashes
,
2890 unresolved_reloc
, warned
);
2893 address
= rel
->r_offset
;
2895 /* Then, process normally. */
2898 case R_BFIN_GNU_VTINHERIT
:
2899 case R_BFIN_GNU_VTENTRY
:
2900 return bfd_reloc_ok
;
2903 /* Relocation is to the address of the entry for this symbol
2904 in the global offset table. */
2906 && strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
2909 /* Relocation is the offset of the entry for this symbol in
2910 the global offset table. */
2917 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2918 BFD_ASSERT (sgot
!= NULL
);
2925 off
= h
->got
.offset
;
2926 BFD_ASSERT (off
!= (bfd_vma
) - 1);
2927 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
2929 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2936 /* This is actually a static link, or it is a
2937 -Bsymbolic link and the symbol is defined
2938 locally, or the symbol was forced to be local
2939 because of a version file.. We must initialize
2940 this entry in the global offset table. Since
2941 the offset must always be a multiple of 4, we
2942 use the least significant bit to record whether
2943 we have initialized it already.
2945 When doing a dynamic link, we create a .rela.got
2946 relocation entry to initialize the value. This
2947 is done in the finish_dynamic_symbol routine. */
2952 bfd_put_32 (output_bfd
, relocation
,
2953 sgot
->contents
+ off
);
2958 unresolved_reloc
= FALSE
;
2962 BFD_ASSERT (local_got_offsets
!= NULL
);
2963 off
= local_got_offsets
[r_symndx
];
2964 BFD_ASSERT (off
!= (bfd_vma
) - 1);
2966 /* The offset must always be a multiple of 4. We use
2967 the least significant bit to record whether we have
2968 already generated the necessary reloc. */
2973 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
2978 Elf_Internal_Rela outrel
;
2981 s
= bfd_get_section_by_name (dynobj
, ".rela.got");
2982 BFD_ASSERT (s
!= NULL
);
2984 outrel
.r_offset
= (sgot
->output_section
->vma
2985 + sgot
->output_offset
+ off
);
2987 ELF32_R_INFO (0, R_pcrel24
);
2988 outrel
.r_addend
= relocation
;
2991 s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
2992 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
2995 local_got_offsets
[r_symndx
] |= 1;
2999 relocation
= sgot
->output_offset
+ off
;
3001 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
3007 case R_pcrel24_jump_l
:
3011 relocation
+= rel
->r_addend
;
3013 /* Perform usual pc-relative correction. */
3014 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
3015 relocation
-= address
;
3017 /* We are getting reloc_entry->address 2 byte off from
3018 the start of instruction. Assuming absolute postion
3019 of the reloc data. But, following code had been written assuming
3020 reloc address is starting at begining of instruction.
3021 To compensate that I have increased the value of
3022 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
3029 x
= bfd_get_16 (input_bfd
, contents
+ address
);
3030 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
3031 bfd_put_16 (input_bfd
, x
, contents
+ address
);
3033 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
3034 x
= relocation
& 0xFFFF;
3035 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
3042 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3044 relocation
, rel
->r_addend
);
3049 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3050 because such sections are not SEC_ALLOC and thus ld.so will
3051 not process them. */
3052 if (unresolved_reloc
3053 && !((input_section
->flags
& SEC_DEBUGGING
) != 0 && h
->def_dynamic
))
3055 (*_bfd_error_handler
)
3056 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3058 input_section
, (long) rel
->r_offset
, h
->root
.root
.string
);
3062 if (r
!= bfd_reloc_ok
)
3067 name
= h
->root
.root
.string
;
3070 name
= bfd_elf_string_from_elf_section (input_bfd
,
3071 symtab_hdr
->sh_link
,
3076 name
= bfd_section_name (input_bfd
, sec
);
3079 if (r
== bfd_reloc_overflow
)
3081 if (!(info
->callbacks
->reloc_overflow
3082 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3083 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
)))
3088 (*_bfd_error_handler
)
3089 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3090 input_bfd
, input_section
,
3091 (long) rel
->r_offset
, name
, (int) r
);
3101 bfin_gc_mark_hook (asection
* sec
,
3102 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3103 Elf_Internal_Rela
* rel
,
3104 struct elf_link_hash_entry
*h
,
3105 Elf_Internal_Sym
* sym
)
3109 switch (ELF32_R_TYPE (rel
->r_info
))
3112 case R_BFIN_GNU_VTINHERIT
:
3113 case R_BFIN_GNU_VTENTRY
:
3117 switch (h
->root
.type
)
3122 case bfd_link_hash_defined
:
3123 case bfd_link_hash_defweak
:
3124 return h
->root
.u
.def
.section
;
3126 case bfd_link_hash_common
:
3127 return h
->root
.u
.c
.p
->section
;
3132 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
3138 /* Update the got entry reference counts for the section being removed. */
3141 bfinfdpic_gc_sweep_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
3142 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3143 asection
*sec ATTRIBUTE_UNUSED
,
3144 const Elf_Internal_Rela
*relocs ATTRIBUTE_UNUSED
)
3149 /* Update the got entry reference counts for the section being removed. */
3152 bfin_gc_sweep_hook (bfd
* abfd
,
3153 struct bfd_link_info
*info
,
3155 const Elf_Internal_Rela
* relocs
)
3157 Elf_Internal_Shdr
*symtab_hdr
;
3158 struct elf_link_hash_entry
**sym_hashes
;
3159 bfd_signed_vma
*local_got_refcounts
;
3160 const Elf_Internal_Rela
*rel
, *relend
;
3165 dynobj
= elf_hash_table (info
)->dynobj
;
3169 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3170 sym_hashes
= elf_sym_hashes (abfd
);
3171 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3173 sgot
= bfd_get_section_by_name (dynobj
, ".got");
3174 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
3176 relend
= relocs
+ sec
->reloc_count
;
3177 for (rel
= relocs
; rel
< relend
; rel
++)
3179 unsigned long r_symndx
;
3180 struct elf_link_hash_entry
*h
;
3182 switch (ELF32_R_TYPE (rel
->r_info
))
3185 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3186 if (r_symndx
>= symtab_hdr
->sh_info
)
3188 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3189 if (h
->got
.refcount
> 0)
3192 if (h
->got
.refcount
== 0)
3194 /* We don't need the .got entry any more. */
3196 srelgot
->size
-= sizeof (Elf32_External_Rela
);
3200 else if (local_got_refcounts
!= NULL
)
3202 if (local_got_refcounts
[r_symndx
] > 0)
3204 --local_got_refcounts
[r_symndx
];
3205 if (local_got_refcounts
[r_symndx
] == 0)
3207 /* We don't need the .got entry any more. */
3210 srelgot
->size
-= sizeof (Elf32_External_Rela
);
3222 /* We need dynamic symbols for every section, since segments can
3223 relocate independently. */
3225 _bfinfdpic_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3226 struct bfd_link_info
*info
3228 asection
*p ATTRIBUTE_UNUSED
)
3230 switch (elf_section_data (p
)->this_hdr
.sh_type
)
3234 /* If sh_type is yet undecided, assume it could be
3235 SHT_PROGBITS/SHT_NOBITS. */
3239 /* There shouldn't be section relative relocations
3240 against any other section. */
3246 /* Create a .got section, as well as its additional info field. This
3247 is almost entirely copied from
3248 elflink.c:_bfd_elf_create_got_section(). */
3251 _bfin_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
3253 flagword flags
, pltflags
;
3255 struct elf_link_hash_entry
*h
;
3256 struct bfd_link_hash_entry
*bh
;
3257 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3261 /* This function may be called more than once. */
3262 s
= bfd_get_section_by_name (abfd
, ".got");
3263 if (s
!= NULL
&& (s
->flags
& SEC_LINKER_CREATED
) != 0)
3266 /* Machine specific: although pointers are 32-bits wide, we want the
3267 GOT to be aligned to a 64-bit boundary, such that function
3268 descriptors in it can be accessed with 64-bit loads and
3272 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3273 | SEC_LINKER_CREATED
);
3276 s
= bfd_make_section_with_flags (abfd
, ".got", flags
);
3278 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3281 if (bed
->want_got_plt
)
3283 s
= bfd_make_section_with_flags (abfd
, ".got.plt", flags
);
3285 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3289 if (bed
->want_got_sym
)
3291 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3292 (or .got.plt) section. We don't do this in the linker script
3293 because we don't want to define the symbol if we are not creating
3294 a global offset table. */
3295 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "_GLOBAL_OFFSET_TABLE_");
3296 elf_hash_table (info
)->hgot
= h
;
3300 /* Machine-specific: we want the symbol for executables as
3302 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3306 /* The first bit of the global offset table is the header. */
3307 s
->size
+= bed
->got_header_size
;
3309 /* This is the machine-specific part. Create and initialize section
3310 data for the got. */
3311 if (IS_FDPIC (abfd
))
3313 bfinfdpic_got_section (info
) = s
;
3314 bfinfdpic_relocs_info (info
) = htab_try_create (1,
3315 bfinfdpic_relocs_info_hash
,
3316 bfinfdpic_relocs_info_eq
,
3318 if (! bfinfdpic_relocs_info (info
))
3321 s
= bfd_make_section_with_flags (abfd
, ".rel.got",
3322 (flags
| SEC_READONLY
));
3324 || ! bfd_set_section_alignment (abfd
, s
, 2))
3327 bfinfdpic_gotrel_section (info
) = s
;
3329 /* Machine-specific. */
3330 s
= bfd_make_section_with_flags (abfd
, ".rofixup",
3331 (flags
| SEC_READONLY
));
3333 || ! bfd_set_section_alignment (abfd
, s
, 2))
3336 bfinfdpic_gotfixup_section (info
) = s
;
3343 flags
= BSF_GLOBAL
| BSF_WEAK
;
3346 /* Define _gp in .rofixup, for FDPIC, or .got otherwise. If it
3347 turns out that we're linking with a different linker script, the
3348 linker script will override it. */
3350 if (!(_bfd_generic_link_add_one_symbol
3351 (info
, abfd
, "_gp", flags
, s
, offset
, (const char *) NULL
, FALSE
,
3352 bed
->collect
, &bh
)))
3354 h
= (struct elf_link_hash_entry
*) bh
;
3356 h
->type
= STT_OBJECT
;
3357 /* h->other = STV_HIDDEN; */ /* Should we? */
3359 /* Machine-specific: we want the symbol for executables as well. */
3360 if (IS_FDPIC (abfd
) && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3366 /* Make sure the got and plt sections exist, and that our pointers in
3367 the link hash table point to them. */
3370 elf32_bfinfdpic_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3372 /* This is mostly copied from
3373 elflink.c:_bfd_elf_create_dynamic_sections(). */
3374 flagword flags
, pltflags
;
3376 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3378 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3379 .rel[a].bss sections. */
3381 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3382 | SEC_LINKER_CREATED
);
3385 pltflags
|= SEC_CODE
;
3386 if (bed
->plt_not_loaded
)
3387 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
3388 if (bed
->plt_readonly
)
3389 pltflags
|= SEC_READONLY
;
3391 s
= bfd_make_section (abfd
, ".plt");
3393 || ! bfd_set_section_flags (abfd
, s
, pltflags
)
3394 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
3396 /* Blackfin-specific: remember it. */
3397 bfinfdpic_plt_section (info
) = s
;
3399 if (bed
->want_plt_sym
)
3401 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3403 struct elf_link_hash_entry
*h
;
3404 struct bfd_link_hash_entry
*bh
= NULL
;
3406 if (! (_bfd_generic_link_add_one_symbol
3407 (info
, abfd
, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
, 0, NULL
,
3408 FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
3410 h
= (struct elf_link_hash_entry
*) bh
;
3412 h
->type
= STT_OBJECT
;
3414 if (! info
->executable
3415 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3419 /* Blackfin-specific: we want rel relocations for the plt. */
3420 s
= bfd_make_section (abfd
, ".rel.plt");
3422 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
3423 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3425 /* Blackfin-specific: remember it. */
3426 bfinfdpic_pltrel_section (info
) = s
;
3428 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3429 if (! _bfin_create_got_section (abfd
, info
))
3432 /* Blackfin-specific: make sure we created everything we wanted. */
3433 BFD_ASSERT (bfinfdpic_got_section (info
) && bfinfdpic_gotrel_section (info
)
3434 /* && bfinfdpic_gotfixup_section (info) */
3435 && bfinfdpic_plt_section (info
)
3436 && bfinfdpic_pltrel_section (info
));
3438 if (bed
->want_dynbss
)
3440 /* The .dynbss section is a place to put symbols which are defined
3441 by dynamic objects, are referenced by regular objects, and are
3442 not functions. We must allocate space for them in the process
3443 image and use a R_*_COPY reloc to tell the dynamic linker to
3444 initialize them at run time. The linker script puts the .dynbss
3445 section into the .bss section of the final image. */
3446 s
= bfd_make_section (abfd
, ".dynbss");
3448 || ! bfd_set_section_flags (abfd
, s
, SEC_ALLOC
| SEC_LINKER_CREATED
))
3451 /* The .rel[a].bss section holds copy relocs. This section is not
3452 normally needed. We need to create it here, though, so that the
3453 linker will map it to an output section. We can't just create it
3454 only if we need it, because we will not know whether we need it
3455 until we have seen all the input files, and the first time the
3456 main linker code calls BFD after examining all the input files
3457 (size_dynamic_sections) the input sections have already been
3458 mapped to the output sections. If the section turns out not to
3459 be needed, we can discard it later. We will never need this
3460 section when generating a shared object, since they do not use
3464 s
= bfd_make_section (abfd
,
3465 (bed
->default_use_rela_p
3466 ? ".rela.bss" : ".rel.bss"));
3468 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
3469 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3477 /* The name of the dynamic interpreter. This is put in the .interp
3480 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3482 #define DEFAULT_STACK_SIZE 0x20000
3484 /* This structure is used to collect the number of entries present in
3485 each addressable range of the got. */
3486 struct _bfinfdpic_dynamic_got_info
3488 /* Several bits of information about the current link. */
3489 struct bfd_link_info
*info
;
3490 /* Total size needed for GOT entries within the 18- or 32-bit
3492 bfd_vma got17m4
, gothilo
;
3493 /* Total size needed for function descriptor entries within the 18-
3494 or 32-bit ranges. */
3495 bfd_vma fd17m4
, fdhilo
;
3496 /* Total size needed function descriptor entries referenced in PLT
3497 entries, that would be profitable to place in offsets close to
3498 the PIC register. */
3500 /* Total size needed by lazy PLT entries. */
3502 /* Number of relocations carried over from input object files. */
3503 unsigned long relocs
;
3504 /* Number of fixups introduced by relocations in input object files. */
3505 unsigned long fixups
;
3508 /* Compute the total GOT size required by each symbol in each range.
3509 Symbols may require up to 4 words in the GOT: an entry pointing to
3510 the symbol, an entry pointing to its function descriptor, and a
3511 private function descriptors taking two words. */
3514 _bfinfdpic_count_got_plt_entries (void **entryp
, void *dinfo_
)
3516 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3517 struct _bfinfdpic_dynamic_got_info
*dinfo
= dinfo_
;
3518 unsigned relocs
= 0, fixups
= 0;
3520 /* Allocate space for a GOT entry pointing to the symbol. */
3522 dinfo
->got17m4
+= 4;
3523 else if (entry
->gothilo
)
3524 dinfo
->gothilo
+= 4;
3529 /* Allocate space for a GOT entry pointing to the function
3531 if (entry
->fdgot17m4
)
3532 dinfo
->got17m4
+= 4;
3533 else if (entry
->fdgothilo
)
3534 dinfo
->gothilo
+= 4;
3539 /* Decide whether we need a PLT entry, a function descriptor in the
3540 GOT, and a lazy PLT entry for this symbol. */
3541 entry
->plt
= entry
->call
3542 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3543 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3544 entry
->privfd
= entry
->plt
3545 || entry
->fdgoff17m4
|| entry
->fdgoffhilo
3546 || ((entry
->fd
|| entry
->fdgot17m4
|| entry
->fdgothilo
)
3547 && (entry
->symndx
!= -1
3548 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
)));
3549 entry
->lazyplt
= entry
->privfd
3550 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3551 && ! (dinfo
->info
->flags
& DF_BIND_NOW
)
3552 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3554 /* Allocate space for a function descriptor. */
3555 if (entry
->fdgoff17m4
)
3557 else if (entry
->privfd
&& entry
->plt
)
3559 else if (entry
->privfd
)
3566 dinfo
->lzplt
+= LZPLT_NORMAL_SIZE
;
3568 if (!dinfo
->info
->executable
|| dinfo
->info
->pie
)
3569 relocs
= entry
->relocs32
+ entry
->relocsfd
+ entry
->relocsfdv
;
3572 if (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
))
3574 if (entry
->symndx
!= -1
3575 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3576 fixups
+= entry
->relocs32
+ 2 * entry
->relocsfdv
;
3579 relocs
+= entry
->relocs32
+ entry
->relocsfdv
;
3581 if (entry
->symndx
!= -1
3582 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
))
3584 if (entry
->symndx
!= -1
3585 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3586 fixups
+= entry
->relocsfd
;
3589 relocs
+= entry
->relocsfd
;
3592 entry
->dynrelocs
+= relocs
;
3593 entry
->fixups
+= fixups
;
3594 dinfo
->relocs
+= relocs
;
3595 dinfo
->fixups
+= fixups
;
3600 /* This structure is used to assign offsets to got entries, function
3601 descriptors, plt entries and lazy plt entries. */
3603 struct _bfinfdpic_dynamic_got_plt_info
3605 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3606 struct _bfinfdpic_dynamic_got_info g
;
3608 /* For each addressable range, we record a MAX (positive) and MIN
3609 (negative) value. CUR is used to assign got entries, and it's
3610 incremented from an initial positive value to MAX, then from MIN
3611 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3612 assign function descriptors, and it's decreased from an initial
3613 non-positive value to MIN, then from MAX down to CUR (unless CUR
3614 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3615 to even words. ODD, if non-zero, indicates an odd word to be
3616 used for the next got entry, otherwise CUR is used and
3617 incremented by a pair of words, wrapping around when it reaches
3618 MAX. FDCUR is decremented (and wrapped) before the next function
3619 descriptor is chosen. FDPLT indicates the number of remaining
3620 slots that can be used for function descriptors used only by PLT
3622 struct _bfinfdpic_dynamic_got_alloc_data
3624 bfd_signed_vma max
, cur
, odd
, fdcur
, min
;
3629 /* Determine the positive and negative ranges to be used by each
3630 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3631 double-word boundary, are the minimum (negative) and maximum
3632 (positive) GOT offsets already used by previous ranges, except for
3633 an ODD entry that may have been left behind. GOT and FD indicate
3634 the size of GOT entries and function descriptors that must be
3635 placed within the range from -WRAP to WRAP. If there's room left,
3636 up to FDPLT bytes should be reserved for additional function
3639 inline static bfd_signed_vma
3640 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data
*gad
,
3641 bfd_signed_vma fdcur
,
3649 bfd_signed_vma wrapmin
= -wrap
;
3651 /* Start at the given initial points. */
3655 /* If we had an incoming odd word and we have any got entries that
3656 are going to use it, consume it, otherwise leave gad->odd at
3657 zero. We might force gad->odd to zero and return the incoming
3658 odd such that it is used by the next range, but then GOT entries
3659 might appear to be out of order and we wouldn't be able to
3660 shorten the GOT by one word if it turns out to end with an
3661 unpaired GOT entry. */
3671 /* If we're left with an unpaired GOT entry, compute its location
3672 such that we can return it. Otherwise, if got doesn't require an
3673 odd number of words here, either odd was already zero in the
3674 block above, or it was set to zero because got was non-zero, or
3675 got was already zero. In the latter case, we want the value of
3676 odd to carry over to the return statement, so we don't want to
3677 reset odd unless the condition below is true. */
3684 /* Compute the tentative boundaries of this range. */
3685 gad
->max
= cur
+ got
;
3686 gad
->min
= fdcur
- fd
;
3689 /* If function descriptors took too much space, wrap some of them
3691 if (gad
->min
< wrapmin
)
3693 gad
->max
+= wrapmin
- gad
->min
;
3696 /* If there is space left and we have function descriptors
3697 referenced in PLT entries that could take advantage of shorter
3698 offsets, place them here. */
3699 else if (fdplt
&& gad
->min
> wrapmin
)
3702 if ((bfd_vma
) (gad
->min
- wrapmin
) < fdplt
)
3703 fds
= gad
->min
- wrapmin
;
3712 /* If GOT entries took too much space, wrap some of them around.
3713 This may well cause gad->min to become lower than wrapmin. This
3714 will cause a relocation overflow later on, so we don't have to
3716 if ((bfd_vma
) gad
->max
> wrap
)
3718 gad
->min
-= gad
->max
- wrap
;
3721 /* If there is more space left, try to place some more function
3722 descriptors for PLT entries. */
3723 else if (fdplt
&& (bfd_vma
) gad
->max
< wrap
)
3726 if ((bfd_vma
) (wrap
- gad
->max
) < fdplt
)
3727 fds
= wrap
- gad
->max
;
3736 /* If odd was initially computed as an offset past the wrap point,
3739 odd
= gad
->min
+ odd
- gad
->max
;
3741 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3742 before returning, so do it here too. This guarantees that,
3743 should cur and fdcur meet at the wrap point, they'll both be
3745 if (gad
->cur
== gad
->max
)
3746 gad
->cur
= gad
->min
;
3751 /* Compute the location of the next GOT entry, given the allocation
3752 data for a range. */
3754 inline static bfd_signed_vma
3755 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3761 /* If there was an odd word left behind, use it. */
3767 /* Otherwise, use the word pointed to by cur, reserve the next
3768 as an odd word, and skip to the next pair of words, possibly
3771 gad
->odd
= gad
->cur
+ 4;
3773 if (gad
->cur
== gad
->max
)
3774 gad
->cur
= gad
->min
;
3780 /* Compute the location of the next function descriptor entry in the
3781 GOT, given the allocation data for a range. */
3783 inline static bfd_signed_vma
3784 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3786 /* If we're at the bottom, wrap around, and only then allocate the
3787 next pair of words. */
3788 if (gad
->fdcur
== gad
->min
)
3789 gad
->fdcur
= gad
->max
;
3790 return gad
->fdcur
-= 8;
3793 /* Assign GOT offsets for every GOT entry and function descriptor.
3794 Doing everything in a single pass is tricky. */
3797 _bfinfdpic_assign_got_entries (void **entryp
, void *info_
)
3799 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3800 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3803 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3804 else if (entry
->gothilo
)
3805 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3807 if (entry
->fdgot17m4
)
3808 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3809 else if (entry
->fdgothilo
)
3810 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3812 if (entry
->fdgoff17m4
)
3813 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3814 else if (entry
->plt
&& dinfo
->got17m4
.fdplt
)
3816 dinfo
->got17m4
.fdplt
-= 8;
3817 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3819 else if (entry
->plt
)
3821 dinfo
->gothilo
.fdplt
-= 8;
3822 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3824 else if (entry
->privfd
)
3825 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3830 /* Assign GOT offsets to private function descriptors used by PLT
3831 entries (or referenced by 32-bit offsets), as well as PLT entries
3832 and lazy PLT entries. */
3835 _bfinfdpic_assign_plt_entries (void **entryp
, void *info_
)
3837 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3838 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3840 /* If this symbol requires a local function descriptor, allocate
3842 if (entry
->privfd
&& entry
->fd_entry
== 0)
3844 if (dinfo
->got17m4
.fdplt
)
3846 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3847 dinfo
->got17m4
.fdplt
-= 8;
3851 BFD_ASSERT (dinfo
->gothilo
.fdplt
);
3852 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3853 dinfo
->gothilo
.fdplt
-= 8;
3861 /* We use the section's raw size to mark the location of the
3863 entry
->plt_entry
= bfinfdpic_plt_section (dinfo
->g
.info
)->size
;
3865 /* Figure out the length of this PLT entry based on the
3866 addressing mode we need to reach the function descriptor. */
3867 BFD_ASSERT (entry
->fd_entry
);
3868 if (entry
->fd_entry
>= -(1 << (18 - 1))
3869 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
3874 bfinfdpic_plt_section (dinfo
->g
.info
)->size
+= size
;
3879 entry
->lzplt_entry
= dinfo
->g
.lzplt
;
3880 dinfo
->g
.lzplt
+= LZPLT_NORMAL_SIZE
;
3881 /* If this entry is the one that gets the resolver stub, account
3882 for the additional instruction. */
3883 if (entry
->lzplt_entry
% BFINFDPIC_LZPLT_BLOCK_SIZE
3884 == BFINFDPIC_LZPLT_RESOLV_LOC
)
3885 dinfo
->g
.lzplt
+= LZPLT_RESOLVER_EXTRA
;
3891 /* Follow indirect and warning hash entries so that each got entry
3892 points to the final symbol definition. P must point to a pointer
3893 to the hash table we're traversing. Since this traversal may
3894 modify the hash table, we set this pointer to NULL to indicate
3895 we've made a potentially-destructive change to the hash table, so
3896 the traversal must be restarted. */
3898 _bfinfdpic_resolve_final_relocs_info (void **entryp
, void *p
)
3900 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3903 if (entry
->symndx
== -1)
3905 struct elf_link_hash_entry
*h
= entry
->d
.h
;
3906 struct bfinfdpic_relocs_info
*oentry
;
3908 while (h
->root
.type
== bfd_link_hash_indirect
3909 || h
->root
.type
== bfd_link_hash_warning
)
3910 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
3912 if (entry
->d
.h
== h
)
3915 oentry
= bfinfdpic_relocs_info_for_global (*htab
, 0, h
, entry
->addend
,
3920 /* Merge the two entries. */
3921 bfinfdpic_pic_merge_early_relocs_info (oentry
, entry
);
3922 htab_clear_slot (*htab
, entryp
);
3928 /* If we can't find this entry with the new bfd hash, re-insert
3929 it, and get the traversal restarted. */
3930 if (! htab_find (*htab
, entry
))
3932 htab_clear_slot (*htab
, entryp
);
3933 entryp
= htab_find_slot (*htab
, entry
, INSERT
);
3936 /* Abort the traversal, since the whole table may have
3937 moved, and leave it up to the parent to restart the
3939 *(htab_t
*)p
= NULL
;
3947 /* Set the sizes of the dynamic sections. */
3950 elf32_bfinfdpic_size_dynamic_sections (bfd
*output_bfd
,
3951 struct bfd_link_info
*info
)
3955 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
3959 dynobj
= elf_hash_table (info
)->dynobj
;
3960 BFD_ASSERT (dynobj
!= NULL
);
3962 if (elf_hash_table (info
)->dynamic_sections_created
)
3964 /* Set the contents of the .interp section to the interpreter. */
3965 if (info
->executable
)
3967 s
= bfd_get_section_by_name (dynobj
, ".interp");
3968 BFD_ASSERT (s
!= NULL
);
3969 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
3970 s
->contents
= (bfd_byte
*) ELF_DYNAMIC_INTERPRETER
;
3974 memset (&gpinfo
, 0, sizeof (gpinfo
));
3975 gpinfo
.g
.info
= info
;
3979 htab_t relocs
= bfinfdpic_relocs_info (info
);
3981 htab_traverse (relocs
, _bfinfdpic_resolve_final_relocs_info
, &relocs
);
3983 if (relocs
== bfinfdpic_relocs_info (info
))
3987 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_count_got_plt_entries
,
3991 /* Compute the total size taken by entries in the 18-bit range,
3992 to tell how many PLT function descriptors we can bring into it
3993 without causing it to overflow. */
3994 limit
= odd
+ gpinfo
.g
.got17m4
+ gpinfo
.g
.fd17m4
;
3995 if (limit
< (bfd_vma
)1 << 18)
3996 limit
= ((bfd_vma
)1 << 18) - limit
;
3999 if (gpinfo
.g
.fdplt
< limit
)
4000 limit
= gpinfo
.g
.fdplt
;
4002 /* Determine the ranges of GOT offsets that we can use for each
4003 range of addressing modes. */
4004 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfo
.got17m4
,
4011 (bfd_vma
)1 << (18-1));
4012 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfo
.gothilo
,
4018 gpinfo
.g
.fdplt
- gpinfo
.got17m4
.fdplt
,
4019 (bfd_vma
)1 << (32-1));
4021 /* Now assign (most) GOT offsets. */
4022 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_got_entries
,
4025 bfinfdpic_got_section (info
)->size
= gpinfo
.gothilo
.max
4026 - gpinfo
.gothilo
.min
4027 /* If an odd word is the last word of the GOT, we don't need this
4028 word to be part of the GOT. */
4029 - (odd
+ 4 == gpinfo
.gothilo
.max
? 4 : 0);
4030 if (bfinfdpic_got_section (info
)->size
== 0)
4031 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
4032 else if (bfinfdpic_got_section (info
)->size
== 12
4033 && ! elf_hash_table (info
)->dynamic_sections_created
)
4035 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
4036 bfinfdpic_got_section (info
)->size
= 0;
4040 bfinfdpic_got_section (info
)->contents
=
4041 (bfd_byte
*) bfd_zalloc (dynobj
,
4042 bfinfdpic_got_section (info
)->size
);
4043 if (bfinfdpic_got_section (info
)->contents
== NULL
)
4047 if (elf_hash_table (info
)->dynamic_sections_created
)
4048 /* Subtract the number of lzplt entries, since those will generate
4049 relocations in the pltrel section. */
4050 bfinfdpic_gotrel_section (info
)->size
=
4051 (gpinfo
.g
.relocs
- gpinfo
.g
.lzplt
/ LZPLT_NORMAL_SIZE
)
4052 * get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
4054 BFD_ASSERT (gpinfo
.g
.relocs
== 0);
4055 if (bfinfdpic_gotrel_section (info
)->size
== 0)
4056 bfinfdpic_gotrel_section (info
)->flags
|= SEC_EXCLUDE
;
4059 bfinfdpic_gotrel_section (info
)->contents
=
4060 (bfd_byte
*) bfd_zalloc (dynobj
,
4061 bfinfdpic_gotrel_section (info
)->size
);
4062 if (bfinfdpic_gotrel_section (info
)->contents
== NULL
)
4066 bfinfdpic_gotfixup_section (info
)->size
= (gpinfo
.g
.fixups
+ 1) * 4;
4067 if (bfinfdpic_gotfixup_section (info
)->size
== 0)
4068 bfinfdpic_gotfixup_section (info
)->flags
|= SEC_EXCLUDE
;
4071 bfinfdpic_gotfixup_section (info
)->contents
=
4072 (bfd_byte
*) bfd_zalloc (dynobj
,
4073 bfinfdpic_gotfixup_section (info
)->size
);
4074 if (bfinfdpic_gotfixup_section (info
)->contents
== NULL
)
4078 if (elf_hash_table (info
)->dynamic_sections_created
)
4080 bfinfdpic_pltrel_section (info
)->size
=
4081 gpinfo
.g
.lzplt
/ LZPLT_NORMAL_SIZE
* get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
4082 if (bfinfdpic_pltrel_section (info
)->size
== 0)
4083 bfinfdpic_pltrel_section (info
)->flags
|= SEC_EXCLUDE
;
4086 bfinfdpic_pltrel_section (info
)->contents
=
4087 (bfd_byte
*) bfd_zalloc (dynobj
,
4088 bfinfdpic_pltrel_section (info
)->size
);
4089 if (bfinfdpic_pltrel_section (info
)->contents
== NULL
)
4094 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4095 such that there's room for the additional instruction needed to
4096 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4097 account for them, our block size is 4 bytes smaller than the real
4099 if (elf_hash_table (info
)->dynamic_sections_created
)
4101 bfinfdpic_plt_section (info
)->size
= gpinfo
.g
.lzplt
4102 + ((gpinfo
.g
.lzplt
+ (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) - LZPLT_NORMAL_SIZE
)
4103 / (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) * LZPLT_RESOLVER_EXTRA
);
4106 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4107 actually assign lazy PLT entries addresses. */
4110 /* Save information that we're going to need to generate GOT and PLT
4112 bfinfdpic_got_initial_offset (info
) = -gpinfo
.gothilo
.min
;
4114 if (get_elf_backend_data (output_bfd
)->want_got_sym
)
4115 elf_hash_table (info
)->hgot
->root
.u
.def
.value
4116 += bfinfdpic_got_initial_offset (info
);
4118 if (elf_hash_table (info
)->dynamic_sections_created
)
4119 bfinfdpic_plt_initial_offset (info
) =
4120 bfinfdpic_plt_section (info
)->size
;
4122 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_plt_entries
,
4125 /* Allocate the PLT section contents only after
4126 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4127 non-lazy PLT entries. */
4128 if (elf_hash_table (info
)->dynamic_sections_created
)
4130 if (bfinfdpic_plt_section (info
)->size
== 0)
4131 bfinfdpic_plt_section (info
)->flags
|= SEC_EXCLUDE
;
4134 bfinfdpic_plt_section (info
)->contents
=
4135 (bfd_byte
*) bfd_zalloc (dynobj
,
4136 bfinfdpic_plt_section (info
)->size
);
4137 if (bfinfdpic_plt_section (info
)->contents
== NULL
)
4142 if (elf_hash_table (info
)->dynamic_sections_created
)
4144 if (bfinfdpic_got_section (info
)->size
)
4145 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTGOT
, 0))
4148 if (bfinfdpic_pltrel_section (info
)->size
)
4149 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
4150 || !_bfd_elf_add_dynamic_entry (info
, DT_PLTREL
, DT_REL
)
4151 || !_bfd_elf_add_dynamic_entry (info
, DT_JMPREL
, 0))
4154 if (bfinfdpic_gotrel_section (info
)->size
)
4155 if (!_bfd_elf_add_dynamic_entry (info
, DT_REL
, 0)
4156 || !_bfd_elf_add_dynamic_entry (info
, DT_RELSZ
, 0)
4157 || !_bfd_elf_add_dynamic_entry (info
, DT_RELENT
,
4158 sizeof (Elf32_External_Rel
)))
4166 elf32_bfinfdpic_always_size_sections (bfd
*output_bfd
,
4167 struct bfd_link_info
*info
)
4169 if (!info
->relocatable
)
4171 struct elf_link_hash_entry
*h
;
4174 /* Force a PT_GNU_STACK segment to be created. */
4175 if (! elf_tdata (output_bfd
)->stack_flags
)
4176 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
| PF_X
;
4178 /* Define __stacksize if it's not defined yet. */
4179 h
= elf_link_hash_lookup (elf_hash_table (info
), "__stacksize",
4180 FALSE
, FALSE
, FALSE
);
4181 if (! h
|| h
->root
.type
!= bfd_link_hash_defined
4182 || h
->type
!= STT_OBJECT
4185 struct bfd_link_hash_entry
*bh
= NULL
;
4187 if (!(_bfd_generic_link_add_one_symbol
4188 (info
, output_bfd
, "__stacksize",
4189 BSF_GLOBAL
, bfd_abs_section_ptr
, DEFAULT_STACK_SIZE
,
4190 (const char *) NULL
, FALSE
,
4191 get_elf_backend_data (output_bfd
)->collect
, &bh
)))
4194 h
= (struct elf_link_hash_entry
*) bh
;
4196 h
->type
= STT_OBJECT
;
4199 /* Create a stack section, and set its alignment. */
4200 sec
= bfd_make_section (output_bfd
, ".stack");
4203 || ! bfd_set_section_alignment (output_bfd
, sec
, 3))
4211 elf32_bfinfdpic_modify_segment_map (bfd
*output_bfd
,
4212 struct bfd_link_info
*info
)
4214 struct elf_segment_map
*m
;
4216 /* objcopy and strip preserve what's already there using
4217 elf32_bfinfdpic_copy_private_bfd_data (). */
4221 for (m
= elf_tdata (output_bfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4222 if (m
->p_type
== PT_GNU_STACK
)
4227 asection
*sec
= bfd_get_section_by_name (output_bfd
, ".stack");
4228 struct elf_link_hash_entry
*h
;
4232 /* Obtain the pointer to the __stacksize symbol. */
4233 h
= elf_link_hash_lookup (elf_hash_table (info
), "__stacksize",
4234 FALSE
, FALSE
, FALSE
);
4235 while (h
->root
.type
== bfd_link_hash_indirect
4236 || h
->root
.type
== bfd_link_hash_warning
)
4237 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
4238 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
);
4240 /* Set the section size from the symbol value. We
4241 intentionally ignore the symbol section. */
4242 if (h
->root
.type
== bfd_link_hash_defined
)
4243 sec
->size
= h
->root
.u
.def
.value
;
4245 sec
->size
= DEFAULT_STACK_SIZE
;
4247 /* Add the stack section to the PT_GNU_STACK segment,
4248 such that its size and alignment requirements make it
4250 m
->sections
[m
->count
] = sec
;
4259 elf32_bfinfdpic_finish_dynamic_sections (bfd
*output_bfd
,
4260 struct bfd_link_info
*info
)
4265 dynobj
= elf_hash_table (info
)->dynobj
;
4267 if (bfinfdpic_got_section (info
))
4269 BFD_ASSERT (bfinfdpic_gotrel_section (info
)->size
4270 == (bfinfdpic_gotrel_section (info
)->reloc_count
4271 * sizeof (Elf32_External_Rel
)));
4273 if (bfinfdpic_gotfixup_section (info
))
4275 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
4276 bfd_vma got_value
= hgot
->root
.u
.def
.value
4277 + hgot
->root
.u
.def
.section
->output_section
->vma
4278 + hgot
->root
.u
.def
.section
->output_offset
;
4280 _bfinfdpic_add_rofixup (output_bfd
, bfinfdpic_gotfixup_section (info
),
4283 if (bfinfdpic_gotfixup_section (info
)->size
4284 != (bfinfdpic_gotfixup_section (info
)->reloc_count
* 4))
4286 (*_bfd_error_handler
)
4287 ("LINKER BUG: .rofixup section size mismatch");
4292 if (elf_hash_table (info
)->dynamic_sections_created
)
4294 BFD_ASSERT (bfinfdpic_pltrel_section (info
)->size
4295 == (bfinfdpic_pltrel_section (info
)->reloc_count
4296 * sizeof (Elf32_External_Rel
)));
4299 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4301 if (elf_hash_table (info
)->dynamic_sections_created
)
4303 Elf32_External_Dyn
* dyncon
;
4304 Elf32_External_Dyn
* dynconend
;
4306 BFD_ASSERT (sdyn
!= NULL
);
4308 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4309 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4311 for (; dyncon
< dynconend
; dyncon
++)
4313 Elf_Internal_Dyn dyn
;
4315 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4323 dyn
.d_un
.d_ptr
= bfinfdpic_got_section (info
)->output_section
->vma
4324 + bfinfdpic_got_section (info
)->output_offset
4325 + bfinfdpic_got_initial_offset (info
);
4326 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4330 dyn
.d_un
.d_ptr
= bfinfdpic_pltrel_section (info
)
4331 ->output_section
->vma
4332 + bfinfdpic_pltrel_section (info
)->output_offset
;
4333 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4337 dyn
.d_un
.d_val
= bfinfdpic_pltrel_section (info
)->size
;
4338 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4347 /* Adjust a symbol defined by a dynamic object and referenced by a
4351 elf32_bfinfdpic_adjust_dynamic_symbol
4352 (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4353 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
)
4357 dynobj
= elf_hash_table (info
)->dynobj
;
4359 /* Make sure we know what is going on here. */
4360 BFD_ASSERT (dynobj
!= NULL
4361 && (h
->u
.weakdef
!= NULL
4364 && !h
->def_regular
)));
4366 /* If this is a weak symbol, and there is a real definition, the
4367 processor independent code will have arranged for us to see the
4368 real definition first, and we can just use the same value. */
4369 if (h
->u
.weakdef
!= NULL
)
4371 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
4372 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
4373 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
4374 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
4380 /* Perform any actions needed for dynamic symbols. */
4383 elf32_bfinfdpic_finish_dynamic_symbol
4384 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4385 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4386 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
4387 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4392 /* Decide whether to attempt to turn absptr or lsda encodings in
4393 shared libraries into pcrel within the given input section. */
4396 bfinfdpic_elf_use_relative_eh_frame
4397 (bfd
*input_bfd ATTRIBUTE_UNUSED
,
4398 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4399 asection
*eh_frame_section ATTRIBUTE_UNUSED
)
4401 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4405 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4408 bfinfdpic_elf_encode_eh_address (bfd
*abfd
,
4409 struct bfd_link_info
*info
,
4410 asection
*osec
, bfd_vma offset
,
4411 asection
*loc_sec
, bfd_vma loc_offset
,
4414 struct elf_link_hash_entry
*h
;
4416 h
= elf_hash_table (info
)->hgot
;
4417 BFD_ASSERT (h
&& h
->root
.type
== bfd_link_hash_defined
);
4419 if (! h
|| (_bfinfdpic_osec_to_segment (abfd
, osec
)
4420 == _bfinfdpic_osec_to_segment (abfd
, loc_sec
->output_section
)))
4421 return _bfd_elf_encode_eh_address (abfd
, info
, osec
, offset
,
4422 loc_sec
, loc_offset
, encoded
);
4424 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd
, osec
)
4425 == (_bfinfdpic_osec_to_segment
4426 (abfd
, h
->root
.u
.def
.section
->output_section
)));
4428 *encoded
= osec
->vma
+ offset
4429 - (h
->root
.u
.def
.value
4430 + h
->root
.u
.def
.section
->output_section
->vma
4431 + h
->root
.u
.def
.section
->output_offset
);
4433 return DW_EH_PE_datarel
| DW_EH_PE_sdata4
;
4438 /* Look through the relocs for a section during the first phase.
4440 Besides handling virtual table relocs for gc, we have to deal with
4441 all sorts of PIC-related relocations. We describe below the
4442 general plan on how to handle such relocations, even though we only
4443 collect information at this point, storing them in hash tables for
4444 perusal of later passes.
4446 32 relocations are propagated to the linker output when creating
4447 position-independent output. LO16 and HI16 relocations are not
4448 supposed to be encountered in this case.
4450 LABEL16 should always be resolvable by the linker, since it's only
4453 LABEL24, on the other hand, is used by calls. If it turns out that
4454 the target of a call is a dynamic symbol, a PLT entry must be
4455 created for it, which triggers the creation of a private function
4456 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4458 GPREL relocations require the referenced symbol to be in the same
4459 segment as _gp, but this can only be checked later.
4461 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4462 exist. LABEL24 might as well, since it may require a PLT entry,
4463 that will require a got.
4465 Non-FUNCDESC GOT relocations require a GOT entry to be created
4466 regardless of whether the symbol is dynamic. However, since a
4467 global symbol that turns out to not be exported may have the same
4468 address of a non-dynamic symbol, we don't assign GOT entries at
4469 this point, such that we can share them in this case. A relocation
4470 for the GOT entry always has to be created, be it to offset a
4471 private symbol by the section load address, be it to get the symbol
4472 resolved dynamically.
4474 FUNCDESC GOT relocations require a GOT entry to be created, and
4475 handled as if a FUNCDESC relocation was applied to the GOT entry in
4478 FUNCDESC relocations referencing a symbol that turns out to NOT be
4479 dynamic cause a private function descriptor to be created. The
4480 FUNCDESC relocation then decays to a 32 relocation that points at
4481 the private descriptor. If the symbol is dynamic, the FUNCDESC
4482 relocation is propagated to the linker output, such that the
4483 dynamic linker creates the canonical descriptor, pointing to the
4484 dynamically-resolved definition of the function.
4486 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4487 symbols that are assigned to the same segment as the GOT, but we
4488 can only check this later, after we know the complete set of
4489 symbols defined and/or exported.
4491 FUNCDESC GOTOFF relocations require a function descriptor to be
4492 created and, unless lazy binding is disabled or the symbol is not
4493 dynamic, a lazy PLT entry. Since we can't tell at this point
4494 whether a symbol is going to be dynamic, we have to decide later
4495 whether to create a lazy PLT entry or bind the descriptor directly
4496 to the private function.
4498 FUNCDESC_VALUE relocations are not supposed to be present in object
4499 files, but they may very well be simply propagated to the linker
4500 output, since they have no side effect.
4503 A function descriptor always requires a FUNCDESC_VALUE relocation.
4504 Whether it's in .plt.rel or not depends on whether lazy binding is
4505 enabled and on whether the referenced symbol is dynamic.
4507 The existence of a lazy PLT requires the resolverStub lazy PLT
4508 entry to be present.
4511 As for assignment of GOT, PLT and lazy PLT entries, and private
4512 descriptors, we might do them all sequentially, but we can do
4513 better than that. For example, we can place GOT entries and
4514 private function descriptors referenced using 12-bit operands
4515 closer to the PIC register value, such that these relocations don't
4516 overflow. Those that are only referenced with LO16 relocations
4517 could come next, but we may as well place PLT-required function
4518 descriptors in the 12-bit range to make them shorter. Symbols
4519 referenced with LO16/HI16 may come next, but we may place
4520 additional function descriptors in the 16-bit range if we can
4521 reliably tell that we've already placed entries that are ever
4522 referenced with only LO16. PLT entries are therefore generated as
4523 small as possible, while not introducing relocation overflows in
4524 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4525 generated before or after PLT entries, but not intermingled with
4526 them, such that we can have more lazy PLT entries in range for a
4527 branch to the resolverStub. The resolverStub should be emitted at
4528 the most distant location from the first lazy PLT entry such that
4529 it's still in range for a branch, or closer, if there isn't a need
4530 for so many lazy PLT entries. Additional lazy PLT entries may be
4531 emitted after the resolverStub, as long as branches are still in
4532 range. If the branch goes out of range, longer lazy PLT entries
4535 We could further optimize PLT and lazy PLT entries by giving them
4536 priority in assignment to closer-to-gr17 locations depending on the
4537 number of occurrences of references to them (assuming a function
4538 that's called more often is more important for performance, so its
4539 PLT entry should be faster), or taking hints from the compiler.
4540 Given infinite time and money... :-) */
4543 bfinfdpic_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4544 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4546 Elf_Internal_Shdr
*symtab_hdr
;
4547 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
4548 const Elf_Internal_Rela
*rel
;
4549 const Elf_Internal_Rela
*rel_end
;
4551 struct bfinfdpic_relocs_info
*picrel
;
4553 if (info
->relocatable
)
4556 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4557 sym_hashes
= elf_sym_hashes (abfd
);
4558 sym_hashes_end
= sym_hashes
+ symtab_hdr
->sh_size
/sizeof(Elf32_External_Sym
);
4559 if (!elf_bad_symtab (abfd
))
4560 sym_hashes_end
-= symtab_hdr
->sh_info
;
4562 dynobj
= elf_hash_table (info
)->dynobj
;
4563 rel_end
= relocs
+ sec
->reloc_count
;
4564 for (rel
= relocs
; rel
< rel_end
; rel
++)
4566 struct elf_link_hash_entry
*h
;
4567 unsigned long r_symndx
;
4569 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4570 if (r_symndx
< symtab_hdr
->sh_info
)
4573 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4575 switch (ELF32_R_TYPE (rel
->r_info
))
4577 case R_BFIN_GOT17M4
:
4580 case R_BFIN_FUNCDESC_GOT17M4
:
4581 case R_BFIN_FUNCDESC_GOTHI
:
4582 case R_BFIN_FUNCDESC_GOTLO
:
4583 case R_BFIN_GOTOFF17M4
:
4584 case R_BFIN_GOTOFFHI
:
4585 case R_BFIN_GOTOFFLO
:
4586 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4587 case R_BFIN_FUNCDESC_GOTOFFHI
:
4588 case R_BFIN_FUNCDESC_GOTOFFLO
:
4589 case R_BFIN_FUNCDESC
:
4590 case R_BFIN_FUNCDESC_VALUE
:
4591 if (! IS_FDPIC (abfd
))
4595 case R_pcrel24_jump_l
:
4597 if (IS_FDPIC (abfd
) && ! dynobj
)
4599 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4600 if (! _bfin_create_got_section (abfd
, info
))
4603 if (! IS_FDPIC (abfd
))
4610 if (h
->dynindx
== -1)
4611 switch (ELF_ST_VISIBILITY (h
->other
))
4617 bfd_elf_link_record_dynamic_symbol (info
, h
);
4621 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4623 rel
->r_addend
, INSERT
);
4626 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4627 (info
), abfd
, r_symndx
,
4628 rel
->r_addend
, INSERT
);
4638 switch (ELF32_R_TYPE (rel
->r_info
))
4641 case R_pcrel24_jump_l
:
4642 if (IS_FDPIC (abfd
))
4646 case R_BFIN_FUNCDESC_VALUE
:
4647 picrel
->relocsfdv
++;
4648 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4653 if (! IS_FDPIC (abfd
))
4657 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4661 case R_BFIN_GOT17M4
:
4662 picrel
->got17m4
= 1;
4667 picrel
->gothilo
= 1;
4670 case R_BFIN_FUNCDESC_GOT17M4
:
4671 picrel
->fdgot17m4
= 1;
4674 case R_BFIN_FUNCDESC_GOTHI
:
4675 case R_BFIN_FUNCDESC_GOTLO
:
4676 picrel
->fdgothilo
= 1;
4679 case R_BFIN_GOTOFF17M4
:
4680 case R_BFIN_GOTOFFHI
:
4681 case R_BFIN_GOTOFFLO
:
4685 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4686 picrel
->fdgoff17m4
= 1;
4689 case R_BFIN_FUNCDESC_GOTOFFHI
:
4690 case R_BFIN_FUNCDESC_GOTOFFLO
:
4691 picrel
->fdgoffhilo
= 1;
4694 case R_BFIN_FUNCDESC
:
4699 /* This relocation describes the C++ object vtable hierarchy.
4700 Reconstruct it for later use during GC. */
4701 case R_BFIN_GNU_VTINHERIT
:
4702 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4706 /* This relocation describes which C++ vtable entries are actually
4707 used. Record for later use during GC. */
4708 case R_BFIN_GNU_VTENTRY
:
4709 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4715 case R_pcrel12_jump_s
:
4721 (*_bfd_error_handler
)
4722 (_("%B: unsupported relocation type %i"),
4723 abfd
, ELF32_R_TYPE (rel
->r_info
));
4731 /* Set the right machine number for a Blackfin ELF file. */
4734 elf32_bfin_object_p (bfd
*abfd
)
4736 bfd_default_set_arch_mach (abfd
, bfd_arch_bfin
, 0);
4737 return (((elf_elfheader (abfd
)->e_flags
& EF_BFIN_FDPIC
) != 0)
4738 == (IS_FDPIC (abfd
)));
4742 elf32_bfin_set_private_flags (bfd
* abfd
, flagword flags
)
4744 elf_elfheader (abfd
)->e_flags
= flags
;
4745 elf_flags_init (abfd
) = TRUE
;
4749 /* Copy backend specific data from one object module to another. */
4752 bfin_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4754 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4755 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4758 BFD_ASSERT (!elf_flags_init (obfd
)
4759 || elf_elfheader (obfd
)->e_flags
== elf_elfheader (ibfd
)->e_flags
);
4761 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
4762 elf_flags_init (obfd
) = TRUE
;
4767 elf32_bfinfdpic_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4771 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4772 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4775 if (! bfin_elf_copy_private_bfd_data (ibfd
, obfd
))
4778 if (! elf_tdata (ibfd
) || ! elf_tdata (ibfd
)->phdr
4779 || ! elf_tdata (obfd
) || ! elf_tdata (obfd
)->phdr
)
4782 /* Copy the stack size. */
4783 for (i
= 0; i
< elf_elfheader (ibfd
)->e_phnum
; i
++)
4784 if (elf_tdata (ibfd
)->phdr
[i
].p_type
== PT_GNU_STACK
)
4786 Elf_Internal_Phdr
*iphdr
= &elf_tdata (ibfd
)->phdr
[i
];
4788 for (i
= 0; i
< elf_elfheader (obfd
)->e_phnum
; i
++)
4789 if (elf_tdata (obfd
)->phdr
[i
].p_type
== PT_GNU_STACK
)
4791 memcpy (&elf_tdata (obfd
)->phdr
[i
], iphdr
, sizeof (*iphdr
));
4793 /* Rewrite the phdrs, since we're only called after they
4794 were first written. */
4795 if (bfd_seek (obfd
, (bfd_signed_vma
) get_elf_backend_data (obfd
)
4796 ->s
->sizeof_ehdr
, SEEK_SET
) != 0
4797 || get_elf_backend_data (obfd
)->s
4798 ->write_out_phdrs (obfd
, elf_tdata (obfd
)->phdr
,
4799 elf_elfheader (obfd
)->e_phnum
) != 0)
4811 /* Display the flags field. */
4813 elf32_bfin_print_private_bfd_data (bfd
* abfd
, PTR ptr
)
4815 FILE *file
= (FILE *) ptr
;
4818 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
4820 /* Print normal ELF private data. */
4821 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
4823 flags
= elf_elfheader (abfd
)->e_flags
;
4825 /* xgettext:c-format */
4826 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
4828 if (flags
& EF_BFIN_PIC
)
4829 fprintf (file
, " -fpic");
4831 if (flags
& EF_BFIN_FDPIC
)
4832 fprintf (file
, " -mfdpic");
4839 /* Merge backend specific data from an object file to the output
4840 object file when linking. */
4843 elf32_bfin_merge_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4845 flagword old_flags
, old_partial
;
4846 flagword new_flags
, new_partial
;
4847 bfd_boolean error
= FALSE
;
4849 new_flags
= elf_elfheader (ibfd
)->e_flags
;
4850 old_flags
= elf_elfheader (obfd
)->e_flags
;
4852 if (new_flags
& EF_BFIN_FDPIC
)
4853 new_flags
&= ~EF_BFIN_PIC
;
4856 (*_bfd_error_handler
) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4857 old_flags
, new_flags
, elf_flags_init (obfd
) ? "yes" : "no",
4858 bfd_get_filename (ibfd
));
4861 if (!elf_flags_init (obfd
)) /* First call, no flags set. */
4863 elf_flags_init (obfd
) = TRUE
;
4864 old_flags
= new_flags
;
4867 else if (new_flags
== old_flags
) /* Compatible flags are ok. */
4870 else /* Possibly incompatible flags. */
4872 /* We don't have to do anything if the pic flags are the same, or the new
4873 module(s) were compiled with -mlibrary-pic. */
4874 new_partial
= (new_flags
& EF_BFIN_PIC_FLAGS
);
4875 old_partial
= (old_flags
& EF_BFIN_PIC_FLAGS
);
4876 if (new_partial
== old_partial
)
4879 /* If we have mixtures of -fpic and -fPIC, or in both bits. */
4880 else if (new_partial
!= 0 && old_partial
!= 0)
4881 old_flags
|= new_partial
;
4883 /* One module was compiled for pic and the other was not, see if we have
4884 had any relocations that are not pic-safe. */
4886 old_flags
|= new_partial
;
4890 /* Update the old flags now with changes made above. */
4891 elf_elfheader (obfd
)->e_flags
= old_flags
;
4893 if (((new_flags
& EF_BFIN_FDPIC
) == 0)
4894 != (! IS_FDPIC (ibfd
)))
4897 if (IS_FDPIC (obfd
))
4898 (*_bfd_error_handler
)
4899 (_("%s: cannot link non-fdpic object file into fdpic executable"),
4900 bfd_get_filename (ibfd
));
4902 (*_bfd_error_handler
)
4903 (_("%s: cannot link fdpic object file into non-fdpic executable"),
4904 bfd_get_filename (ibfd
));
4908 bfd_set_error (bfd_error_bad_value
);
4913 /* bfin ELF linker hash entry. */
4915 struct bfin_link_hash_entry
4917 struct elf_link_hash_entry root
;
4919 /* Number of PC relative relocs copied for this symbol. */
4920 struct bfin_pcrel_relocs_copied
*pcrel_relocs_copied
;
4923 /* bfin ELF linker hash table. */
4925 struct bfin_link_hash_table
4927 struct elf_link_hash_table root
;
4929 /* Small local sym to section mapping cache. */
4930 struct sym_sec_cache sym_sec
;
4933 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4935 static struct bfd_hash_entry
*
4936 bfin_link_hash_newfunc (struct bfd_hash_entry
*entry
,
4937 struct bfd_hash_table
*table
, const char *string
)
4939 struct bfd_hash_entry
*ret
= entry
;
4941 /* Allocate the structure if it has not already been allocated by a
4944 ret
= bfd_hash_allocate (table
, sizeof (struct bfin_link_hash_entry
));
4948 /* Call the allocation method of the superclass. */
4949 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
4951 bfin_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
4956 /* Create an bfin ELF linker hash table. */
4958 static struct bfd_link_hash_table
*
4959 bfin_link_hash_table_create (bfd
* abfd
)
4961 struct bfin_link_hash_table
*ret
;
4962 bfd_size_type amt
= sizeof (struct bfin_link_hash_table
);
4964 ret
= bfd_zalloc (abfd
, amt
);
4968 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
4969 bfin_link_hash_newfunc
,
4970 sizeof (struct elf_link_hash_entry
)))
4976 ret
->sym_sec
.abfd
= NULL
;
4978 return &ret
->root
.root
;
4981 /* The size in bytes of an entry in the procedure linkage table. */
4983 /* Finish up the dynamic sections. */
4986 bfin_finish_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4987 struct bfd_link_info
*info
)
4992 dynobj
= elf_hash_table (info
)->dynobj
;
4994 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4996 if (elf_hash_table (info
)->dynamic_sections_created
)
4998 Elf32_External_Dyn
*dyncon
, *dynconend
;
5000 BFD_ASSERT (sdyn
!= NULL
);
5002 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5003 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5004 for (; dyncon
< dynconend
; dyncon
++)
5006 Elf_Internal_Dyn dyn
;
5008 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5016 /* Finish up dynamic symbol handling. We set the contents of various
5017 dynamic sections here. */
5020 bfin_finish_dynamic_symbol (bfd
* output_bfd
,
5021 struct bfd_link_info
*info
,
5022 struct elf_link_hash_entry
*h
,
5023 Elf_Internal_Sym
* sym
)
5027 dynobj
= elf_hash_table (info
)->dynobj
;
5029 if (h
->got
.offset
!= (bfd_vma
) - 1)
5033 Elf_Internal_Rela rela
;
5036 /* This symbol has an entry in the global offset table.
5039 sgot
= bfd_get_section_by_name (dynobj
, ".got");
5040 srela
= bfd_get_section_by_name (dynobj
, ".rela.got");
5041 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
5043 rela
.r_offset
= (sgot
->output_section
->vma
5044 + sgot
->output_offset
5045 + (h
->got
.offset
& ~(bfd_vma
) 1));
5047 /* If this is a -Bsymbolic link, and the symbol is defined
5048 locally, we just want to emit a RELATIVE reloc. Likewise if
5049 the symbol was forced to be local because of a version file.
5050 The entry in the global offset table will already have been
5051 initialized in the relocate_section function. */
5054 || h
->dynindx
== -1 || h
->forced_local
) && h
->def_regular
)
5056 fprintf(stderr
, "*** check this relocation %s\n", __FUNCTION__
);
5057 rela
.r_info
= ELF32_R_INFO (0, R_pcrel24
);
5058 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
5062 offset
& ~(bfd_vma
) 1)));
5066 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5067 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
5068 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_got
);
5072 loc
= srela
->contents
;
5073 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
5074 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
5081 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5082 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
5083 || h
== elf_hash_table (info
)->hgot
)
5084 sym
->st_shndx
= SHN_ABS
;
5089 /* Adjust a symbol defined by a dynamic object and referenced by a
5090 regular object. The current definition is in some section of the
5091 dynamic object, but we're not including those sections. We have to
5092 change the definition to something the rest of the link can
5096 bfin_adjust_dynamic_symbol (struct bfd_link_info
*info
,
5097 struct elf_link_hash_entry
*h
)
5101 unsigned int power_of_two
;
5103 dynobj
= elf_hash_table (info
)->dynobj
;
5105 /* Make sure we know what is going on here. */
5106 BFD_ASSERT (dynobj
!= NULL
5108 || h
->u
.weakdef
!= NULL
5109 || (h
->def_dynamic
&& h
->ref_regular
&& !h
->def_regular
)));
5111 /* If this is a function, put it in the procedure linkage table. We
5112 will fill in the contents of the procedure linkage table later,
5113 when we know the address of the .got section. */
5114 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
5119 /* If this is a weak symbol, and there is a real definition, the
5120 processor independent code will have arranged for us to see the
5121 real definition first, and we can just use the same value. */
5122 if (h
->u
.weakdef
!= NULL
)
5124 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
5125 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
5126 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
5127 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
5131 /* This is a reference to a symbol defined by a dynamic object which
5132 is not a function. */
5134 /* If we are creating a shared library, we must presume that the
5135 only references to the symbol are via the global offset table.
5136 For such cases we need not do anything here; the relocations will
5137 be handled correctly by relocate_section. */
5141 /* We must allocate the symbol in our .dynbss section, which will
5142 become part of the .bss section of the executable. There will be
5143 an entry for this symbol in the .dynsym section. The dynamic
5144 object will contain position independent code, so all references
5145 from the dynamic object to this symbol will go through the global
5146 offset table. The dynamic linker will use the .dynsym entry to
5147 determine the address it must put in the global offset table, so
5148 both the dynamic object and the regular object will refer to the
5149 same memory location for the variable. */
5151 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
5152 BFD_ASSERT (s
!= NULL
);
5154 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5155 copy the initial value out of the dynamic object and into the
5156 runtime process image. We need to remember the offset into the
5157 .rela.bss section we are going to use. */
5158 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5162 srel
= bfd_get_section_by_name (dynobj
, ".rela.bss");
5163 BFD_ASSERT (srel
!= NULL
);
5164 srel
->size
+= sizeof (Elf32_External_Rela
);
5168 /* We need to figure out the alignment required for this symbol. I
5169 have no idea how ELF linkers handle this. */
5170 power_of_two
= bfd_log2 (h
->size
);
5171 if (power_of_two
> 3)
5174 /* Apply the required alignment. */
5175 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
5176 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
5178 if (!bfd_set_section_alignment (dynobj
, s
, power_of_two
))
5182 /* Define the symbol as being at this point in the section. */
5183 h
->root
.u
.def
.section
= s
;
5184 h
->root
.u
.def
.value
= s
->size
;
5186 /* Increment the section size to make room for the symbol. */
5192 /* The bfin linker needs to keep track of the number of relocs that it
5193 decides to copy in check_relocs for each symbol. This is so that it
5194 can discard PC relative relocs if it doesn't need them when linking
5195 with -Bsymbolic. We store the information in a field extending the
5196 regular ELF linker hash table. */
5198 /* This structure keeps track of the number of PC relative relocs we have
5199 copied for a given symbol. */
5201 struct bfin_pcrel_relocs_copied
5204 struct bfin_pcrel_relocs_copied
*next
;
5205 /* A section in dynobj. */
5207 /* Number of relocs copied in this section. */
5208 bfd_size_type count
;
5211 /* This function is called via elf_link_hash_traverse if we are
5212 creating a shared object. In the -Bsymbolic case it discards the
5213 space allocated to copy PC relative relocs against symbols which
5214 are defined in regular objects. For the normal shared case, it
5215 discards space for pc-relative relocs that have become local due to
5216 symbol visibility changes. We allocated space for them in the
5217 check_relocs routine, but we won't fill them in in the
5218 relocate_section routine.
5220 We also check whether any of the remaining relocations apply
5221 against a readonly section, and set the DF_TEXTREL flag in this
5225 bfin_discard_copies (struct elf_link_hash_entry
*h
, PTR inf
)
5227 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5228 struct bfin_pcrel_relocs_copied
*s
;
5230 if (h
->root
.type
== bfd_link_hash_warning
)
5231 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5233 if (!h
->def_regular
|| (!info
->symbolic
&& !h
->forced_local
))
5235 if ((info
->flags
& DF_TEXTREL
) == 0)
5237 /* Look for relocations against read-only sections. */
5238 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5239 s
!= NULL
; s
= s
->next
)
5240 if ((s
->section
->flags
& SEC_READONLY
) != 0)
5242 info
->flags
|= DF_TEXTREL
;
5250 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5251 s
!= NULL
; s
= s
->next
)
5252 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
5258 bfin_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
5259 struct bfd_link_info
*info
)
5265 dynobj
= elf_hash_table (info
)->dynobj
;
5266 BFD_ASSERT (dynobj
!= NULL
);
5268 if (elf_hash_table (info
)->dynamic_sections_created
)
5270 /* Set the contents of the .interp section to the interpreter. */
5271 if (info
->executable
)
5273 s
= bfd_get_section_by_name (dynobj
, ".interp");
5274 BFD_ASSERT (s
!= NULL
);
5275 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5276 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5281 /* We may have created entries in the .rela.got section.
5282 However, if we are not creating the dynamic sections, we will
5283 not actually use these entries. Reset the size of .rela.got,
5284 which will cause it to get stripped from the output file
5286 s
= bfd_get_section_by_name (dynobj
, ".rela.got");
5291 /* If this is a -Bsymbolic shared link, then we need to discard all
5292 PC relative relocs against symbols defined in a regular object.
5293 For the normal shared case we discard the PC relative relocs
5294 against symbols that have become local due to visibility changes.
5295 We allocated space for them in the check_relocs routine, but we
5296 will not fill them in in the relocate_section routine. */
5298 elf_link_hash_traverse (elf_hash_table (info
),
5299 bfin_discard_copies
, (PTR
) info
);
5301 /* The check_relocs and adjust_dynamic_symbol entry points have
5302 determined the sizes of the various dynamic sections. Allocate
5305 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5310 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5313 /* It's OK to base decisions on the section name, because none
5314 of the dynobj section names depend upon the input files. */
5315 name
= bfd_get_section_name (dynobj
, s
);
5319 if (strncmp (name
, ".rela", 5) == 0)
5323 /* If we don't need this section, strip it from the
5324 output file. This is mostly to handle .rela.bss and
5325 .rela.plt. We must create both sections in
5326 create_dynamic_sections, because they must be created
5327 before the linker maps input sections to output
5328 sections. The linker does that before
5329 adjust_dynamic_symbol is called, and it is that
5330 function which decides whether anything needs to go
5331 into these sections. */
5338 /* We use the reloc_count field as a counter if we need
5339 to copy relocs into the output file. */
5343 else if (strncmp (name
, ".got", 4) != 0)
5345 /* It's not one of our sections, so don't allocate space. */
5351 s
->flags
|= SEC_EXCLUDE
;
5355 /* Allocate memory for the section contents. */
5356 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5357 Unused entries should be reclaimed before the section's contents
5358 are written out, but at the moment this does not happen. Thus in
5359 order to prevent writing out garbage, we initialise the section's
5360 contents to zero. */
5361 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
5362 if (s
->contents
== NULL
&& s
->size
!= 0)
5366 if (elf_hash_table (info
)->dynamic_sections_created
)
5368 /* Add some entries to the .dynamic section. We fill in the
5369 values later, in bfin_finish_dynamic_sections, but we
5370 must add the entries now so that we get the correct size for
5371 the .dynamic section. The DT_DEBUG entry is filled in by the
5372 dynamic linker and used by the debugger. */
5373 #define add_dynamic_entry(TAG, VAL) \
5374 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5378 if (!add_dynamic_entry (DT_DEBUG
, 0))
5385 if (!add_dynamic_entry (DT_RELA
, 0)
5386 || !add_dynamic_entry (DT_RELASZ
, 0)
5387 || !add_dynamic_entry (DT_RELAENT
,
5388 sizeof (Elf32_External_Rela
)))
5392 if ((info
->flags
& DF_TEXTREL
) != 0)
5394 if (!add_dynamic_entry (DT_TEXTREL
, 0))
5398 #undef add_dynamic_entry
5403 /* Given a .data section and a .emreloc in-memory section, store
5404 relocation information into the .emreloc section which can be
5405 used at runtime to relocate the section. This is called by the
5406 linker when the --embedded-relocs switch is used. This is called
5407 after the add_symbols entry point has been called for all the
5408 objects, and before the final_link entry point is called. */
5410 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5411 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*, asection
*, char **));
5414 bfd_bfin_elf32_create_embedded_relocs (
5416 struct bfd_link_info
*info
,
5421 Elf_Internal_Shdr
*symtab_hdr
;
5422 Elf_Internal_Sym
*isymbuf
= NULL
;
5423 Elf_Internal_Rela
*internal_relocs
= NULL
;
5424 Elf_Internal_Rela
*irel
, *irelend
;
5428 BFD_ASSERT (! info
->relocatable
);
5432 if (datasec
->reloc_count
== 0)
5435 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5437 /* Get a copy of the native relocations. */
5438 internal_relocs
= (_bfd_elf_link_read_relocs
5439 (abfd
, datasec
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
5440 info
->keep_memory
));
5441 if (internal_relocs
== NULL
)
5444 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
5445 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
5446 if (relsec
->contents
== NULL
)
5449 p
= relsec
->contents
;
5451 irelend
= internal_relocs
+ datasec
->reloc_count
;
5452 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
5454 asection
*targetsec
;
5456 /* We are going to write a four byte longword into the runtime
5457 reloc section. The longword will be the address in the data
5458 section which must be relocated. It is followed by the name
5459 of the target section NUL-padded or truncated to 8
5462 /* We can only relocate absolute longword relocs at run time. */
5463 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_byte4_data
)
5465 *errmsg
= _("unsupported reloc type");
5466 bfd_set_error (bfd_error_bad_value
);
5470 /* Get the target section referred to by the reloc. */
5471 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
5473 /* A local symbol. */
5474 Elf_Internal_Sym
*isym
;
5476 /* Read this BFD's local symbols if we haven't done so already. */
5477 if (isymbuf
== NULL
)
5479 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5480 if (isymbuf
== NULL
)
5481 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
5482 symtab_hdr
->sh_info
, 0,
5484 if (isymbuf
== NULL
)
5488 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
5489 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5494 struct elf_link_hash_entry
*h
;
5496 /* An external symbol. */
5497 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
5498 h
= elf_sym_hashes (abfd
)[indx
];
5499 BFD_ASSERT (h
!= NULL
);
5500 if (h
->root
.type
== bfd_link_hash_defined
5501 || h
->root
.type
== bfd_link_hash_defweak
)
5502 targetsec
= h
->root
.u
.def
.section
;
5507 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
5508 memset (p
+ 4, 0, 8);
5509 if (targetsec
!= NULL
)
5510 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
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 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5523 if (internal_relocs
!= NULL
5524 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5525 free (internal_relocs
);
5529 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5530 #define TARGET_LITTLE_NAME "elf32-bfin"
5531 #define ELF_ARCH bfd_arch_bfin
5532 #define ELF_MACHINE_CODE EM_BLACKFIN
5533 #define ELF_MAXPAGESIZE 0x1000
5534 #define elf_symbol_leading_char '_'
5536 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5537 #define elf_info_to_howto bfin_info_to_howto
5538 #define elf_info_to_howto_rel 0
5539 #define elf_backend_object_p elf32_bfin_object_p
5541 #define bfd_elf32_bfd_is_local_label_name \
5542 bfin_is_local_label_name
5543 #define bfin_hash_table(p) \
5544 ((struct bfin_link_hash_table *) (p)->hash)
5548 #define elf_backend_create_dynamic_sections \
5549 _bfd_elf_create_dynamic_sections
5550 #define bfd_elf32_bfd_link_hash_table_create \
5551 bfin_link_hash_table_create
5552 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5554 #define elf_backend_check_relocs bfin_check_relocs
5555 #define elf_backend_adjust_dynamic_symbol \
5556 bfin_adjust_dynamic_symbol
5557 #define elf_backend_size_dynamic_sections \
5558 bfin_size_dynamic_sections
5559 #define elf_backend_relocate_section bfin_relocate_section
5560 #define elf_backend_finish_dynamic_symbol \
5561 bfin_finish_dynamic_symbol
5562 #define elf_backend_finish_dynamic_sections \
5563 bfin_finish_dynamic_sections
5564 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5565 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5566 #define bfd_elf32_bfd_merge_private_bfd_data \
5567 elf32_bfin_merge_private_bfd_data
5568 #define bfd_elf32_bfd_set_private_flags \
5569 elf32_bfin_set_private_flags
5570 #define bfd_elf32_bfd_print_private_bfd_data \
5571 elf32_bfin_print_private_bfd_data
5572 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5573 #define elf_backend_can_gc_sections 1
5574 #define elf_backend_can_refcount 1
5575 #define elf_backend_want_got_plt 0
5576 #define elf_backend_plt_readonly 1
5577 #define elf_backend_want_plt_sym 0
5578 #define elf_backend_got_header_size 12
5579 #define elf_backend_rela_normal 1
5581 #include "elf32-target.h"
5583 #undef TARGET_LITTLE_SYM
5584 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5585 #undef TARGET_LITTLE_NAME
5586 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5588 #define elf32_bed elf32_bfinfdpic_bed
5590 #undef elf_backend_gc_sweep_hook
5591 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5593 #undef elf_backend_got_header_size
5594 #define elf_backend_got_header_size 0
5596 #undef elf_backend_relocate_section
5597 #define elf_backend_relocate_section bfinfdpic_relocate_section
5598 #undef elf_backend_check_relocs
5599 #define elf_backend_check_relocs bfinfdpic_check_relocs
5601 #undef bfd_elf32_bfd_link_hash_table_create
5602 #define bfd_elf32_bfd_link_hash_table_create \
5603 bfinfdpic_elf_link_hash_table_create
5604 #undef elf_backend_always_size_sections
5605 #define elf_backend_always_size_sections \
5606 elf32_bfinfdpic_always_size_sections
5607 #undef elf_backend_modify_segment_map
5608 #define elf_backend_modify_segment_map \
5609 elf32_bfinfdpic_modify_segment_map
5610 #undef bfd_elf32_bfd_copy_private_bfd_data
5611 #define bfd_elf32_bfd_copy_private_bfd_data \
5612 elf32_bfinfdpic_copy_private_bfd_data
5614 #undef elf_backend_create_dynamic_sections
5615 #define elf_backend_create_dynamic_sections \
5616 elf32_bfinfdpic_create_dynamic_sections
5617 #undef elf_backend_adjust_dynamic_symbol
5618 #define elf_backend_adjust_dynamic_symbol \
5619 elf32_bfinfdpic_adjust_dynamic_symbol
5620 #undef elf_backend_size_dynamic_sections
5621 #define elf_backend_size_dynamic_sections \
5622 elf32_bfinfdpic_size_dynamic_sections
5623 #undef elf_backend_finish_dynamic_symbol
5624 #define elf_backend_finish_dynamic_symbol \
5625 elf32_bfinfdpic_finish_dynamic_symbol
5626 #undef elf_backend_finish_dynamic_sections
5627 #define elf_backend_finish_dynamic_sections \
5628 elf32_bfinfdpic_finish_dynamic_sections
5630 #undef elf_backend_can_make_relative_eh_frame
5631 #define elf_backend_can_make_relative_eh_frame \
5632 bfinfdpic_elf_use_relative_eh_frame
5633 #undef elf_backend_can_make_lsda_relative_eh_frame
5634 #define elf_backend_can_make_lsda_relative_eh_frame \
5635 bfinfdpic_elf_use_relative_eh_frame
5636 #undef elf_backend_encode_eh_address
5637 #define elf_backend_encode_eh_address \
5638 bfinfdpic_elf_encode_eh_address
5640 #undef elf_backend_may_use_rel_p
5641 #define elf_backend_may_use_rel_p 1
5642 #undef elf_backend_may_use_rela_p
5643 #define elf_backend_may_use_rela_p 1
5644 /* We use REL for dynamic relocations only. */
5645 #undef elf_backend_default_use_rela_p
5646 #define elf_backend_default_use_rela_p 1
5648 #undef elf_backend_omit_section_dynsym
5649 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5651 #include "elf32-target.h"