1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright 2005, 2006, 2007 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
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_GOT17M4", /* name */
720 FALSE
, /* partial_inplace */
721 0xffff, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE
), /* pcrel_offset */
725 /* The upper 16 bits of the GOT offset for the address of the
727 HOWTO (R_BFIN_GOTHI
, /* type */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
731 FALSE
, /* pc_relative */
733 complain_overflow_dont
, /* complain_on_overflow */
734 bfd_elf_generic_reloc
, /* special_function */
735 "R_BFIN_GOTHI", /* name */
736 FALSE
, /* partial_inplace */
737 0xffff, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE
), /* pcrel_offset */
741 /* The lower 16 bits of the GOT offset for the address of the
743 HOWTO (R_BFIN_GOTLO
, /* type */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
747 FALSE
, /* pc_relative */
749 complain_overflow_dont
, /* complain_on_overflow */
750 bfd_elf_generic_reloc
, /* special_function */
751 "R_BFIN_GOTLO", /* name */
752 FALSE
, /* partial_inplace */
753 0xffff, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE
), /* pcrel_offset */
757 /* The 32-bit address of the canonical descriptor of a function. */
758 HOWTO (R_BFIN_FUNCDESC
, /* type */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
762 FALSE
, /* pc_relative */
764 complain_overflow_bitfield
, /* complain_on_overflow */
765 bfd_elf_generic_reloc
, /* special_function */
766 "R_BFIN_FUNCDESC", /* name */
767 FALSE
, /* partial_inplace */
768 0xffffffff, /* src_mask */
769 0xffffffff, /* dst_mask */
770 FALSE
), /* pcrel_offset */
772 /* A 12-bit signed operand with the GOT offset for the address of
773 canonical descriptor of a function. */
774 HOWTO (R_BFIN_FUNCDESC_GOT17M4
, /* type */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
778 FALSE
, /* pc_relative */
780 complain_overflow_signed
, /* complain_on_overflow */
781 bfd_elf_generic_reloc
, /* special_function */
782 "R_BFIN_FUNCDESC_GOT17M4", /* name */
783 FALSE
, /* partial_inplace */
784 0xffff, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE
), /* pcrel_offset */
788 /* The upper 16 bits of the GOT offset for the address of the
789 canonical descriptor of a function. */
790 HOWTO (R_BFIN_FUNCDESC_GOTHI
, /* type */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
794 FALSE
, /* pc_relative */
796 complain_overflow_dont
, /* complain_on_overflow */
797 bfd_elf_generic_reloc
, /* special_function */
798 "R_BFIN_FUNCDESC_GOTHI", /* name */
799 FALSE
, /* partial_inplace */
800 0xffff, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE
), /* pcrel_offset */
804 /* The lower 16 bits of the GOT offset for the address of the
805 canonical descriptor of a function. */
806 HOWTO (R_BFIN_FUNCDESC_GOTLO
, /* type */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
810 FALSE
, /* pc_relative */
812 complain_overflow_dont
, /* complain_on_overflow */
813 bfd_elf_generic_reloc
, /* special_function */
814 "R_BFIN_FUNCDESC_GOTLO", /* name */
815 FALSE
, /* partial_inplace */
816 0xffff, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE
), /* pcrel_offset */
820 /* The 32-bit address of the canonical descriptor of a function. */
821 HOWTO (R_BFIN_FUNCDESC_VALUE
, /* type */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
825 FALSE
, /* pc_relative */
827 complain_overflow_bitfield
, /* complain_on_overflow */
828 bfd_elf_generic_reloc
, /* special_function */
829 "R_BFIN_FUNCDESC_VALUE", /* name */
830 FALSE
, /* partial_inplace */
831 0xffffffff, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE
), /* pcrel_offset */
835 /* A 12-bit signed operand with the GOT offset for the address of
836 canonical descriptor of a function. */
837 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4
, /* type */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
841 FALSE
, /* pc_relative */
843 complain_overflow_signed
, /* complain_on_overflow */
844 bfd_elf_generic_reloc
, /* special_function */
845 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
846 FALSE
, /* partial_inplace */
847 0xffff, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE
), /* pcrel_offset */
851 /* The upper 16 bits of the GOT offset for the address of the
852 canonical descriptor of a function. */
853 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI
, /* type */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
857 FALSE
, /* pc_relative */
859 complain_overflow_dont
, /* complain_on_overflow */
860 bfd_elf_generic_reloc
, /* special_function */
861 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
862 FALSE
, /* partial_inplace */
863 0xffff, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE
), /* pcrel_offset */
867 /* The lower 16 bits of the GOT offset for the address of the
868 canonical descriptor of a function. */
869 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO
, /* type */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
873 FALSE
, /* pc_relative */
875 complain_overflow_dont
, /* complain_on_overflow */
876 bfd_elf_generic_reloc
, /* special_function */
877 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
878 FALSE
, /* partial_inplace */
879 0xffff, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE
), /* pcrel_offset */
883 /* A 12-bit signed operand with the GOT offset for the address of
885 HOWTO (R_BFIN_GOTOFF17M4
, /* type */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
889 FALSE
, /* pc_relative */
891 complain_overflow_signed
, /* complain_on_overflow */
892 bfd_elf_generic_reloc
, /* special_function */
893 "R_BFIN_GOTOFF17M4", /* name */
894 FALSE
, /* partial_inplace */
895 0xffff, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE
), /* pcrel_offset */
899 /* The upper 16 bits of the GOT offset for the address of the
901 HOWTO (R_BFIN_GOTOFFHI
, /* type */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
905 FALSE
, /* pc_relative */
907 complain_overflow_dont
, /* complain_on_overflow */
908 bfd_elf_generic_reloc
, /* special_function */
909 "R_BFIN_GOTOFFHI", /* name */
910 FALSE
, /* partial_inplace */
911 0xffff, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE
), /* pcrel_offset */
915 /* The lower 16 bits of the GOT offset for the address of the
917 HOWTO (R_BFIN_GOTOFFLO
, /* type */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
921 FALSE
, /* pc_relative */
923 complain_overflow_dont
, /* complain_on_overflow */
924 bfd_elf_generic_reloc
, /* special_function */
925 "R_BFIN_GOTOFFLO", /* name */
926 FALSE
, /* partial_inplace */
927 0xffff, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE
), /* pcrel_offset */
932 static reloc_howto_type bfin_gnuext_howto_table
[] =
934 HOWTO (R_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 static reloc_howto_type
*
1084 bfin_bfd_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
1090 i
< (sizeof (bfin_howto_table
)
1091 / sizeof (bfin_howto_table
[0]));
1093 if (bfin_howto_table
[i
].name
!= NULL
1094 && strcasecmp (bfin_howto_table
[i
].name
, r_name
) == 0)
1095 return &bfin_howto_table
[i
];
1098 i
< (sizeof (bfin_gnuext_howto_table
)
1099 / sizeof (bfin_gnuext_howto_table
[0]));
1101 if (bfin_gnuext_howto_table
[i
].name
!= NULL
1102 && strcasecmp (bfin_gnuext_howto_table
[i
].name
, r_name
) == 0)
1103 return &bfin_gnuext_howto_table
[i
];
1108 /* Given a bfin relocation type, return the howto. */
1109 static reloc_howto_type
*
1110 bfin_reloc_type_lookup (bfd
* abfd ATTRIBUTE_UNUSED
,
1111 unsigned int r_type
)
1113 if (r_type
<= BFIN_RELOC_MAX
)
1114 return &bfin_howto_table
[r_type
];
1116 else if (r_type
>= BFIN_GNUEXT_RELOC_MIN
&& r_type
<= BFIN_GNUEXT_RELOC_MAX
)
1117 return &bfin_gnuext_howto_table
[r_type
- BFIN_GNUEXT_RELOC_MIN
];
1119 return (reloc_howto_type
*) NULL
;
1122 /* Return TRUE if the name is a local label.
1123 bfin local labels begin with L$. */
1125 bfin_is_local_label_name (
1126 bfd
*abfd ATTRIBUTE_UNUSED
,
1129 if (label
[0] == 'L' && label
[1] == '$' )
1132 return _bfd_elf_is_local_label_name (abfd
, label
);
1135 extern const bfd_target bfd_elf32_bfinfdpic_vec
;
1136 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
1138 /* An extension of the elf hash table data structure, containing some
1139 additional Blackfin-specific data. */
1140 struct bfinfdpic_elf_link_hash_table
1142 struct elf_link_hash_table elf
;
1144 /* A pointer to the .got section. */
1146 /* A pointer to the .rel.got section. */
1148 /* A pointer to the .rofixup section. */
1149 asection
*sgotfixup
;
1150 /* A pointer to the .plt section. */
1152 /* A pointer to the .rel.plt section. */
1154 /* GOT base offset. */
1156 /* Location of the first non-lazy PLT entry, i.e., the number of
1157 bytes taken by lazy PLT entries. */
1159 /* A hash table holding information about which symbols were
1160 referenced with which PIC-related relocations. */
1161 struct htab
*relocs_info
;
1164 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1166 #define bfinfdpic_hash_table(info) \
1167 ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash))
1169 #define bfinfdpic_got_section(info) \
1170 (bfinfdpic_hash_table (info)->sgot)
1171 #define bfinfdpic_gotrel_section(info) \
1172 (bfinfdpic_hash_table (info)->sgotrel)
1173 #define bfinfdpic_gotfixup_section(info) \
1174 (bfinfdpic_hash_table (info)->sgotfixup)
1175 #define bfinfdpic_plt_section(info) \
1176 (bfinfdpic_hash_table (info)->splt)
1177 #define bfinfdpic_pltrel_section(info) \
1178 (bfinfdpic_hash_table (info)->spltrel)
1179 #define bfinfdpic_relocs_info(info) \
1180 (bfinfdpic_hash_table (info)->relocs_info)
1181 #define bfinfdpic_got_initial_offset(info) \
1182 (bfinfdpic_hash_table (info)->got0)
1183 #define bfinfdpic_plt_initial_offset(info) \
1184 (bfinfdpic_hash_table (info)->plt0)
1186 /* Create a Blackfin ELF linker hash table. */
1188 static struct bfd_link_hash_table
*
1189 bfinfdpic_elf_link_hash_table_create (bfd
*abfd
)
1191 struct bfinfdpic_elf_link_hash_table
*ret
;
1192 bfd_size_type amt
= sizeof (struct bfinfdpic_elf_link_hash_table
);
1194 ret
= bfd_zalloc (abfd
, amt
);
1198 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1199 _bfd_elf_link_hash_newfunc
,
1200 sizeof (struct elf_link_hash_entry
)))
1206 return &ret
->elf
.root
;
1209 /* Decide whether a reference to a symbol can be resolved locally or
1210 not. If the symbol is protected, we want the local address, but
1211 its function descriptor must be assigned by the dynamic linker. */
1212 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1213 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1214 || ! elf_hash_table (INFO)->dynamic_sections_created)
1215 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1216 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1218 /* This structure collects information on what kind of GOT, PLT or
1219 function descriptors are required by relocations that reference a
1221 struct bfinfdpic_relocs_info
1223 /* The index of the symbol, as stored in the relocation r_info, if
1224 we have a local symbol; -1 otherwise. */
1228 /* The input bfd in which the symbol is defined, if it's a local
1231 /* If symndx == -1, the hash table entry corresponding to a global
1232 symbol (even if it turns out to bind locally, in which case it
1233 should ideally be replaced with section's symndx + addend). */
1234 struct elf_link_hash_entry
*h
;
1236 /* The addend of the relocation that references the symbol. */
1239 /* The fields above are used to identify an entry. The fields below
1240 contain information on how an entry is used and, later on, which
1241 locations it was assigned. */
1242 /* The following 2 fields record whether the symbol+addend above was
1243 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1244 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1247 /* Whether a FUNCDESC relocation references symbol+addend. */
1249 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1250 unsigned fdgot17m4
:1;
1251 unsigned fdgothilo
:1;
1252 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1253 unsigned fdgoff17m4
:1;
1254 unsigned fdgoffhilo
:1;
1255 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1256 GOTOFFHI relocations. The addend doesn't really matter, since we
1257 envision that this will only be used to check whether the symbol
1258 is mapped to the same segment as the got. */
1260 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1262 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1265 /* Whether we need a PLT entry for a symbol. Should be implied by
1267 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1269 /* Whether a function descriptor should be created in this link unit
1270 for symbol+addend. Should be implied by something like:
1271 (plt || fdgotoff17m4 || fdgotofflohi
1272 || ((fd || fdgot17m4 || fdgothilo)
1273 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1275 /* Whether a lazy PLT entry is needed for this symbol+addend.
1276 Should be implied by something like:
1277 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1278 && ! (info->flags & DF_BIND_NOW)) */
1280 /* Whether we've already emitted GOT relocations and PLT entries as
1281 needed for this symbol. */
1284 /* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1285 relocations referencing the symbol. */
1286 unsigned relocs32
, relocsfd
, relocsfdv
;
1288 /* The number of .rofixups entries and dynamic relocations allocated
1289 for this symbol, minus any that might have already been used. */
1290 unsigned fixups
, dynrelocs
;
1292 /* The offsets of the GOT entries assigned to symbol+addend, to the
1293 function descriptor's address, and to a function descriptor,
1294 respectively. Should be zero if unassigned. The offsets are
1295 counted from the value that will be assigned to the PIC register,
1296 not from the beginning of the .got section. */
1297 bfd_signed_vma got_entry
, fdgot_entry
, fd_entry
;
1298 /* The offsets of the PLT entries assigned to symbol+addend,
1299 non-lazy and lazy, respectively. If unassigned, should be
1301 bfd_vma plt_entry
, lzplt_entry
;
1304 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1306 bfinfdpic_relocs_info_hash (const void *entry_
)
1308 const struct bfinfdpic_relocs_info
*entry
= entry_
;
1310 return (entry
->symndx
== -1
1311 ? (long) entry
->d
.h
->root
.root
.hash
1312 : entry
->symndx
+ (long) entry
->d
.abfd
->id
* 257) + entry
->addend
;
1315 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1318 bfinfdpic_relocs_info_eq (const void *entry1
, const void *entry2
)
1320 const struct bfinfdpic_relocs_info
*e1
= entry1
;
1321 const struct bfinfdpic_relocs_info
*e2
= entry2
;
1323 return e1
->symndx
== e2
->symndx
&& e1
->addend
== e2
->addend
1324 && (e1
->symndx
== -1 ? e1
->d
.h
== e2
->d
.h
: e1
->d
.abfd
== e2
->d
.abfd
);
1327 /* Find or create an entry in a hash table HT that matches the key
1328 fields of the given ENTRY. If it's not found, memory for a new
1329 entry is allocated in ABFD's obstack. */
1330 static struct bfinfdpic_relocs_info
*
1331 bfinfdpic_relocs_info_find (struct htab
*ht
,
1333 const struct bfinfdpic_relocs_info
*entry
,
1334 enum insert_option insert
)
1336 struct bfinfdpic_relocs_info
**loc
=
1337 (struct bfinfdpic_relocs_info
**) htab_find_slot (ht
, entry
, insert
);
1345 *loc
= bfd_zalloc (abfd
, sizeof (**loc
));
1350 (*loc
)->symndx
= entry
->symndx
;
1351 (*loc
)->d
= entry
->d
;
1352 (*loc
)->addend
= entry
->addend
;
1353 (*loc
)->plt_entry
= (bfd_vma
)-1;
1354 (*loc
)->lzplt_entry
= (bfd_vma
)-1;
1359 /* Obtain the address of the entry in HT associated with H's symbol +
1360 addend, creating a new entry if none existed. ABFD is only used
1361 for memory allocation purposes. */
1362 inline static struct bfinfdpic_relocs_info
*
1363 bfinfdpic_relocs_info_for_global (struct htab
*ht
,
1365 struct elf_link_hash_entry
*h
,
1367 enum insert_option insert
)
1369 struct bfinfdpic_relocs_info entry
;
1373 entry
.addend
= addend
;
1375 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1378 /* Obtain the address of the entry in HT associated with the SYMNDXth
1379 local symbol of the input bfd ABFD, plus the addend, creating a new
1380 entry if none existed. */
1381 inline static struct bfinfdpic_relocs_info
*
1382 bfinfdpic_relocs_info_for_local (struct htab
*ht
,
1386 enum insert_option insert
)
1388 struct bfinfdpic_relocs_info entry
;
1390 entry
.symndx
= symndx
;
1391 entry
.d
.abfd
= abfd
;
1392 entry
.addend
= addend
;
1394 return bfinfdpic_relocs_info_find (ht
, abfd
, &entry
, insert
);
1397 /* Merge fields set by check_relocs() of two entries that end up being
1398 mapped to the same (presumably global) symbol. */
1401 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info
*e2
,
1402 struct bfinfdpic_relocs_info
const *e1
)
1404 e2
->got17m4
|= e1
->got17m4
;
1405 e2
->gothilo
|= e1
->gothilo
;
1407 e2
->fdgot17m4
|= e1
->fdgot17m4
;
1408 e2
->fdgothilo
|= e1
->fdgothilo
;
1409 e2
->fdgoff17m4
|= e1
->fdgoff17m4
;
1410 e2
->fdgoffhilo
|= e1
->fdgoffhilo
;
1411 e2
->gotoff
|= e1
->gotoff
;
1412 e2
->call
|= e1
->call
;
1416 /* Every block of 65535 lazy PLT entries shares a single call to the
1417 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1418 32767, counting from 0). All other lazy PLT entries branch to it
1419 in a single instruction. */
1421 #define LZPLT_RESOLVER_EXTRA 10
1422 #define LZPLT_NORMAL_SIZE 6
1423 #define LZPLT_ENTRIES 1362
1425 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1426 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1428 /* Add a dynamic relocation to the SRELOC section. */
1430 inline static bfd_vma
1431 _bfinfdpic_add_dyn_reloc (bfd
*output_bfd
, asection
*sreloc
, bfd_vma offset
,
1432 int reloc_type
, long dynindx
, bfd_vma addend
,
1433 struct bfinfdpic_relocs_info
*entry
)
1435 Elf_Internal_Rela outrel
;
1436 bfd_vma reloc_offset
;
1438 outrel
.r_offset
= offset
;
1439 outrel
.r_info
= ELF32_R_INFO (dynindx
, reloc_type
);
1440 outrel
.r_addend
= addend
;
1442 reloc_offset
= sreloc
->reloc_count
* sizeof (Elf32_External_Rel
);
1443 BFD_ASSERT (reloc_offset
< sreloc
->size
);
1444 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
,
1445 sreloc
->contents
+ reloc_offset
);
1446 sreloc
->reloc_count
++;
1448 /* If the entry's index is zero, this relocation was probably to a
1449 linkonce section that got discarded. We reserved a dynamic
1450 relocation, but it was for another entry than the one we got at
1451 the time of emitting the relocation. Unfortunately there's no
1452 simple way for us to catch this situation, since the relocation
1453 is cleared right before calling relocate_section, at which point
1454 we no longer know what the relocation used to point to. */
1457 BFD_ASSERT (entry
->dynrelocs
> 0);
1461 return reloc_offset
;
1464 /* Add a fixup to the ROFIXUP section. */
1467 _bfinfdpic_add_rofixup (bfd
*output_bfd
, asection
*rofixup
, bfd_vma offset
,
1468 struct bfinfdpic_relocs_info
*entry
)
1470 bfd_vma fixup_offset
;
1472 if (rofixup
->flags
& SEC_EXCLUDE
)
1475 fixup_offset
= rofixup
->reloc_count
* 4;
1476 if (rofixup
->contents
)
1478 BFD_ASSERT (fixup_offset
< rofixup
->size
);
1479 bfd_put_32 (output_bfd
, offset
, rofixup
->contents
+ fixup_offset
);
1481 rofixup
->reloc_count
++;
1483 if (entry
&& entry
->symndx
)
1485 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
1487 BFD_ASSERT (entry
->fixups
> 0);
1491 return fixup_offset
;
1494 /* Find the segment number in which OSEC, and output section, is
1498 _bfinfdpic_osec_to_segment (bfd
*output_bfd
, asection
*osec
)
1500 Elf_Internal_Phdr
*p
= _bfd_elf_find_segment_containing_section (output_bfd
, osec
);
1502 return (p
!= NULL
) ? p
- elf_tdata (output_bfd
)->phdr
: -1;
1505 inline static bfd_boolean
1506 _bfinfdpic_osec_readonly_p (bfd
*output_bfd
, asection
*osec
)
1508 unsigned seg
= _bfinfdpic_osec_to_segment (output_bfd
, osec
);
1510 return ! (elf_tdata (output_bfd
)->phdr
[seg
].p_flags
& PF_W
);
1513 /* Generate relocations for GOT entries, function descriptors, and
1514 code for PLT and lazy PLT entries. */
1516 inline static bfd_boolean
1517 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info
*entry
,
1519 struct bfd_link_info
*info
,
1521 Elf_Internal_Sym
*sym
,
1525 bfd_vma fd_lazy_rel_offset
= (bfd_vma
)-1;
1532 if (entry
->got_entry
|| entry
->fdgot_entry
|| entry
->fd_entry
)
1534 /* If the symbol is dynamic, consider it for dynamic
1535 relocations, otherwise decay to section + offset. */
1536 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1)
1537 dynindx
= entry
->d
.h
->dynindx
;
1540 if (sec
->output_section
1541 && ! bfd_is_abs_section (sec
->output_section
)
1542 && ! bfd_is_und_section (sec
->output_section
))
1543 dynindx
= elf_section_data (sec
->output_section
)->dynindx
;
1549 /* Generate relocation for GOT entry pointing to the symbol. */
1550 if (entry
->got_entry
)
1553 bfd_vma ad
= addend
;
1555 /* If the symbol is dynamic but binds locally, use
1557 if (sec
&& (entry
->symndx
!= -1
1558 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1560 if (entry
->symndx
== -1)
1561 ad
+= entry
->d
.h
->root
.u
.def
.value
;
1563 ad
+= sym
->st_value
;
1564 ad
+= sec
->output_offset
;
1565 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
1566 idx
= elf_section_data (sec
->output_section
)->dynindx
;
1571 /* If we're linking an executable at a fixed address, we can
1572 omit the dynamic relocation as long as the symbol is local to
1574 if (info
->executable
&& !info
->pie
1575 && (entry
->symndx
!= -1
1576 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1579 ad
+= sec
->output_section
->vma
;
1580 if (entry
->symndx
!= -1
1581 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
1582 _bfinfdpic_add_rofixup (output_bfd
,
1583 bfinfdpic_gotfixup_section (info
),
1584 bfinfdpic_got_section (info
)->output_section
1586 + bfinfdpic_got_section (info
)->output_offset
1587 + bfinfdpic_got_initial_offset (info
)
1588 + entry
->got_entry
, entry
);
1591 _bfinfdpic_add_dyn_reloc (output_bfd
, bfinfdpic_gotrel_section (info
),
1592 _bfd_elf_section_offset
1594 bfinfdpic_got_section (info
),
1595 bfinfdpic_got_initial_offset (info
)
1597 + bfinfdpic_got_section (info
)
1598 ->output_section
->vma
1599 + bfinfdpic_got_section (info
)->output_offset
,
1600 R_byte4_data
, idx
, ad
, entry
);
1602 bfd_put_32 (output_bfd
, ad
,
1603 bfinfdpic_got_section (info
)->contents
1604 + bfinfdpic_got_initial_offset (info
)
1605 + entry
->got_entry
);
1608 /* Generate relocation for GOT entry pointing to a canonical
1609 function descriptor. */
1610 if (entry
->fdgot_entry
)
1615 if (! (entry
->symndx
== -1
1616 && entry
->d
.h
->root
.type
== bfd_link_hash_undefweak
1617 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1619 /* If the symbol is dynamic and there may be dynamic symbol
1620 resolution because we are, or are linked with, a shared
1621 library, emit a FUNCDESC relocation such that the dynamic
1622 linker will allocate the function descriptor. If the
1623 symbol needs a non-local function descriptor but binds
1624 locally (e.g., its visibility is protected, emit a
1625 dynamic relocation decayed to section+offset. */
1626 if (entry
->symndx
== -1
1627 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)
1628 && BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)
1629 && !(info
->executable
&& !info
->pie
))
1631 reloc
= R_BFIN_FUNCDESC
;
1632 idx
= elf_section_data (entry
->d
.h
->root
.u
.def
.section
1633 ->output_section
)->dynindx
;
1634 ad
= entry
->d
.h
->root
.u
.def
.section
->output_offset
1635 + entry
->d
.h
->root
.u
.def
.value
;
1637 else if (entry
->symndx
== -1
1638 && ! BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
))
1640 reloc
= R_BFIN_FUNCDESC
;
1648 /* Otherwise, we know we have a private function descriptor,
1649 so reference it directly. */
1650 if (elf_hash_table (info
)->dynamic_sections_created
)
1651 BFD_ASSERT (entry
->privfd
);
1652 reloc
= R_byte4_data
;
1653 idx
= elf_section_data (bfinfdpic_got_section (info
)
1654 ->output_section
)->dynindx
;
1655 ad
= bfinfdpic_got_section (info
)->output_offset
1656 + bfinfdpic_got_initial_offset (info
) + entry
->fd_entry
;
1659 /* If there is room for dynamic symbol resolution, emit the
1660 dynamic relocation. However, if we're linking an
1661 executable at a fixed location, we won't have emitted a
1662 dynamic symbol entry for the got section, so idx will be
1663 zero, which means we can and should compute the address
1664 of the private descriptor ourselves. */
1665 if (info
->executable
&& !info
->pie
1666 && (entry
->symndx
!= -1
1667 || BFINFDPIC_FUNCDESC_LOCAL (info
, entry
->d
.h
)))
1669 ad
+= bfinfdpic_got_section (info
)->output_section
->vma
;
1670 _bfinfdpic_add_rofixup (output_bfd
,
1671 bfinfdpic_gotfixup_section (info
),
1672 bfinfdpic_got_section (info
)
1673 ->output_section
->vma
1674 + bfinfdpic_got_section (info
)
1676 + bfinfdpic_got_initial_offset (info
)
1677 + entry
->fdgot_entry
, entry
);
1680 _bfinfdpic_add_dyn_reloc (output_bfd
,
1681 bfinfdpic_gotrel_section (info
),
1682 _bfd_elf_section_offset
1684 bfinfdpic_got_section (info
),
1685 bfinfdpic_got_initial_offset (info
)
1686 + entry
->fdgot_entry
)
1687 + bfinfdpic_got_section (info
)
1688 ->output_section
->vma
1689 + bfinfdpic_got_section (info
)
1691 reloc
, idx
, ad
, entry
);
1694 bfd_put_32 (output_bfd
, ad
,
1695 bfinfdpic_got_section (info
)->contents
1696 + bfinfdpic_got_initial_offset (info
)
1697 + entry
->fdgot_entry
);
1700 /* Generate relocation to fill in a private function descriptor in
1702 if (entry
->fd_entry
)
1705 bfd_vma ad
= addend
;
1707 long lowword
, highword
;
1709 /* If the symbol is dynamic but binds locally, use
1711 if (sec
&& (entry
->symndx
!= -1
1712 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1714 if (entry
->symndx
== -1)
1715 ad
+= entry
->d
.h
->root
.u
.def
.value
;
1717 ad
+= sym
->st_value
;
1718 ad
+= sec
->output_offset
;
1719 if (sec
->output_section
&& elf_section_data (sec
->output_section
))
1720 idx
= elf_section_data (sec
->output_section
)->dynindx
;
1725 /* If we're linking an executable at a fixed address, we can
1726 omit the dynamic relocation as long as the symbol is local to
1728 if (info
->executable
&& !info
->pie
1729 && (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (info
, entry
->d
.h
)))
1732 ad
+= sec
->output_section
->vma
;
1734 if (entry
->symndx
!= -1
1735 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
1737 _bfinfdpic_add_rofixup (output_bfd
,
1738 bfinfdpic_gotfixup_section (info
),
1739 bfinfdpic_got_section (info
)
1740 ->output_section
->vma
1741 + bfinfdpic_got_section (info
)
1743 + bfinfdpic_got_initial_offset (info
)
1744 + entry
->fd_entry
, entry
);
1745 _bfinfdpic_add_rofixup (output_bfd
,
1746 bfinfdpic_gotfixup_section (info
),
1747 bfinfdpic_got_section (info
)
1748 ->output_section
->vma
1749 + bfinfdpic_got_section (info
)
1751 + bfinfdpic_got_initial_offset (info
)
1752 + entry
->fd_entry
+ 4, entry
);
1758 = _bfinfdpic_add_dyn_reloc (output_bfd
,
1760 ? bfinfdpic_pltrel_section (info
)
1761 : bfinfdpic_gotrel_section (info
),
1762 _bfd_elf_section_offset
1764 bfinfdpic_got_section (info
),
1765 bfinfdpic_got_initial_offset (info
)
1767 + bfinfdpic_got_section (info
)
1768 ->output_section
->vma
1769 + bfinfdpic_got_section (info
)
1771 R_BFIN_FUNCDESC_VALUE
, idx
, ad
, entry
);
1774 /* If we've omitted the dynamic relocation, just emit the fixed
1775 addresses of the symbol and of the local GOT base offset. */
1776 if (info
->executable
&& !info
->pie
&& sec
&& sec
->output_section
)
1779 highword
= bfinfdpic_got_section (info
)->output_section
->vma
1780 + bfinfdpic_got_section (info
)->output_offset
1781 + bfinfdpic_got_initial_offset (info
);
1783 else if (entry
->lazyplt
)
1788 fd_lazy_rel_offset
= ofst
;
1790 /* A function descriptor used for lazy or local resolving is
1791 initialized such that its high word contains the output
1792 section index in which the PLT entries are located, and
1793 the low word contains the address of the lazy PLT entry
1794 entry point, that must be within the memory region
1795 assigned to that section. */
1796 lowword
= entry
->lzplt_entry
+ 4
1797 + bfinfdpic_plt_section (info
)->output_offset
1798 + bfinfdpic_plt_section (info
)->output_section
->vma
;
1799 highword
= _bfinfdpic_osec_to_segment
1800 (output_bfd
, bfinfdpic_plt_section (info
)->output_section
);
1804 /* A function descriptor for a local function gets the index
1805 of the section. For a non-local function, it's
1808 if (entry
->symndx
== -1 && entry
->d
.h
->dynindx
!= -1
1809 && entry
->d
.h
->dynindx
== idx
)
1812 highword
= _bfinfdpic_osec_to_segment
1813 (output_bfd
, sec
->output_section
);
1816 bfd_put_32 (output_bfd
, lowword
,
1817 bfinfdpic_got_section (info
)->contents
1818 + bfinfdpic_got_initial_offset (info
)
1820 bfd_put_32 (output_bfd
, highword
,
1821 bfinfdpic_got_section (info
)->contents
1822 + bfinfdpic_got_initial_offset (info
)
1823 + entry
->fd_entry
+ 4);
1826 /* Generate code for the PLT entry. */
1827 if (entry
->plt_entry
!= (bfd_vma
) -1)
1829 bfd_byte
*plt_code
= bfinfdpic_plt_section (info
)->contents
1832 BFD_ASSERT (entry
->fd_entry
);
1834 /* Figure out what kind of PLT entry we need, depending on the
1835 location of the function descriptor within the GOT. */
1836 if (entry
->fd_entry
>= -(1 << (18 - 1))
1837 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
1839 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
1840 bfd_put_32 (output_bfd
,
1841 0xe519 | ((entry
->fd_entry
<< 14) & 0xFFFF0000),
1843 bfd_put_32 (output_bfd
,
1844 0xe51b | (((entry
->fd_entry
+ 4) << 14) & 0xFFFF0000),
1850 /* P1.L = fd_entry; P1.H = fd_entry;
1854 bfd_put_32 (output_bfd
,
1855 0xe109 | (entry
->fd_entry
<< 16),
1857 bfd_put_32 (output_bfd
,
1858 0xe149 | (entry
->fd_entry
& 0xFFFF0000),
1860 bfd_put_16 (output_bfd
, 0x5ad9, plt_code
+ 8);
1861 bfd_put_16 (output_bfd
, 0x9159, plt_code
+ 10);
1862 bfd_put_16 (output_bfd
, 0xac5b, plt_code
+ 12);
1866 bfd_put_16 (output_bfd
, 0x0051, plt_code
);
1869 /* Generate code for the lazy PLT entry. */
1870 if (entry
->lzplt_entry
!= (bfd_vma
) -1)
1872 bfd_byte
*lzplt_code
= bfinfdpic_plt_section (info
)->contents
1873 + entry
->lzplt_entry
;
1874 bfd_vma resolverStub_addr
;
1876 bfd_put_32 (output_bfd
, fd_lazy_rel_offset
, lzplt_code
);
1879 resolverStub_addr
= entry
->lzplt_entry
/ BFINFDPIC_LZPLT_BLOCK_SIZE
1880 * BFINFDPIC_LZPLT_BLOCK_SIZE
+ BFINFDPIC_LZPLT_RESOLV_LOC
;
1881 if (resolverStub_addr
>= bfinfdpic_plt_initial_offset (info
))
1882 resolverStub_addr
= bfinfdpic_plt_initial_offset (info
) - LZPLT_NORMAL_SIZE
- LZPLT_RESOLVER_EXTRA
;
1884 if (entry
->lzplt_entry
== resolverStub_addr
)
1886 /* This is a lazy PLT entry that includes a resolver call.
1890 bfd_put_32 (output_bfd
,
1893 bfd_put_16 (output_bfd
, 0x0052, lzplt_code
+ 4);
1897 /* JUMP.S resolverStub */
1898 bfd_put_16 (output_bfd
,
1900 | (((resolverStub_addr
- entry
->lzplt_entry
)
1901 / 2) & (((bfd_vma
)1 << 12) - 1)),
1910 /* Look through the relocs for a section during the first phase, and
1911 allocate space in the global offset table or procedure linkage
1915 bfin_check_relocs (bfd
* abfd
,
1916 struct bfd_link_info
*info
,
1918 const Elf_Internal_Rela
*relocs
)
1921 Elf_Internal_Shdr
*symtab_hdr
;
1922 struct elf_link_hash_entry
**sym_hashes
;
1923 bfd_signed_vma
*local_got_refcounts
;
1924 const Elf_Internal_Rela
*rel
;
1925 const Elf_Internal_Rela
*rel_end
;
1929 if (info
->relocatable
)
1932 dynobj
= elf_hash_table (info
)->dynobj
;
1933 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1934 sym_hashes
= elf_sym_hashes (abfd
);
1935 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1941 rel_end
= relocs
+ sec
->reloc_count
;
1942 for (rel
= relocs
; rel
< rel_end
; rel
++)
1944 unsigned long r_symndx
;
1945 struct elf_link_hash_entry
*h
;
1947 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1948 if (r_symndx
< symtab_hdr
->sh_info
)
1951 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1953 switch (ELF32_R_TYPE (rel
->r_info
))
1955 /* This relocation describes the C++ object vtable hierarchy.
1956 Reconstruct it for later use during GC. */
1957 case R_BFIN_GNU_VTINHERIT
:
1958 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1962 /* This relocation describes which C++ vtable entries
1963 are actually used. Record for later use during GC. */
1964 case R_BFIN_GNU_VTENTRY
:
1965 BFD_ASSERT (h
!= NULL
);
1967 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1973 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
1979 /* Create the .got section. */
1980 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
1981 if (!_bfd_elf_create_got_section (dynobj
, info
))
1987 sgot
= bfd_get_section_by_name (dynobj
, ".got");
1988 BFD_ASSERT (sgot
!= NULL
);
1991 if (srelgot
== NULL
&& (h
!= NULL
|| info
->shared
))
1993 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
1994 if (srelgot
== NULL
)
1996 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1997 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
1999 srelgot
= bfd_make_section_with_flags (dynobj
, ".rela.got",
2002 || !bfd_set_section_alignment (dynobj
, srelgot
, 2))
2009 if (h
->got
.refcount
== 0)
2011 /* Make sure this symbol is output as a dynamic symbol. */
2012 if (h
->dynindx
== -1 && !h
->forced_local
)
2014 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
2018 /* Allocate space in the .got section. */
2020 /* Allocate relocation space. */
2021 srelgot
->size
+= sizeof (Elf32_External_Rela
);
2027 /* This is a global offset table entry for a local symbol. */
2028 if (local_got_refcounts
== NULL
)
2032 size
= symtab_hdr
->sh_info
;
2033 size
*= sizeof (bfd_signed_vma
);
2034 local_got_refcounts
= ((bfd_signed_vma
*)
2035 bfd_zalloc (abfd
, size
));
2036 if (local_got_refcounts
== NULL
)
2038 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2040 if (local_got_refcounts
[r_symndx
] == 0)
2045 /* If we are generating a shared object, we need to
2046 output a R_68K_RELATIVE reloc so that the dynamic
2047 linker can adjust this GOT entry. */
2048 srelgot
->size
+= sizeof (Elf32_External_Rela
);
2051 local_got_refcounts
[r_symndx
]++;
2063 static enum elf_reloc_type_class
2064 elf32_bfin_reloc_type_class (const Elf_Internal_Rela
* rela
)
2066 switch ((int) ELF32_R_TYPE (rela
->r_info
))
2069 return reloc_class_normal
;
2073 /* Relocate an Blackfin ELF section.
2075 The RELOCATE_SECTION function is called by the new ELF backend linker
2076 to handle the relocations for a section.
2078 The relocs are always passed as Rela structures; if the section
2079 actually uses Rel structures, the r_addend field will always be
2082 This function is responsible for adjusting the section contents as
2083 necessary, and (if using Rela relocs and generating a relocatable
2084 output file) adjusting the reloc addend as necessary.
2086 This function does not have to worry about setting the reloc
2087 address or the reloc symbol index.
2089 LOCAL_SYMS is a pointer to the swapped in local symbols.
2091 LOCAL_SECTIONS is an array giving the section in the input file
2092 corresponding to the st_shndx field of each local symbol.
2094 The global hash table entry for the global symbols can be found
2095 via elf_sym_hashes (input_bfd).
2097 When generating relocatable output, this function must handle
2098 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2099 going to be the section symbol corresponding to the output
2100 section, which means that the addend must be adjusted
2104 bfinfdpic_relocate_section (bfd
* output_bfd
,
2105 struct bfd_link_info
*info
,
2107 asection
* input_section
,
2108 bfd_byte
* contents
,
2109 Elf_Internal_Rela
* relocs
,
2110 Elf_Internal_Sym
* local_syms
,
2111 asection
** local_sections
)
2113 Elf_Internal_Shdr
*symtab_hdr
;
2114 struct elf_link_hash_entry
**sym_hashes
;
2115 Elf_Internal_Rela
*rel
;
2116 Elf_Internal_Rela
*relend
;
2117 unsigned isec_segment
, got_segment
, plt_segment
,
2119 int silence_segment_error
= !(info
->shared
|| info
->pie
);
2121 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
2122 sym_hashes
= elf_sym_hashes (input_bfd
);
2123 relend
= relocs
+ input_section
->reloc_count
;
2125 isec_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2126 input_section
->output_section
);
2127 if (IS_FDPIC (output_bfd
) && bfinfdpic_got_section (info
))
2128 got_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2129 bfinfdpic_got_section (info
)
2133 if (IS_FDPIC (output_bfd
) && elf_hash_table (info
)->dynamic_sections_created
)
2134 plt_segment
= _bfinfdpic_osec_to_segment (output_bfd
,
2135 bfinfdpic_plt_section (info
)
2140 for (rel
= relocs
; rel
< relend
; rel
++)
2142 reloc_howto_type
*howto
;
2143 unsigned long r_symndx
;
2144 Elf_Internal_Sym
*sym
;
2146 struct elf_link_hash_entry
*h
;
2148 bfd_reloc_status_type r
;
2149 const char * name
= NULL
;
2152 struct bfinfdpic_relocs_info
*picrel
;
2153 bfd_vma orig_addend
= rel
->r_addend
;
2155 r_type
= ELF32_R_TYPE (rel
->r_info
);
2157 if (r_type
== R_BFIN_GNU_VTINHERIT
2158 || r_type
== R_BFIN_GNU_VTENTRY
)
2161 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2162 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2165 bfd_set_error (bfd_error_bad_value
);
2173 if (r_symndx
< symtab_hdr
->sh_info
)
2175 sym
= local_syms
+ r_symndx
;
2176 osec
= sec
= local_sections
[r_symndx
];
2177 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2179 name
= bfd_elf_string_from_elf_section
2180 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
);
2181 name
= (name
== NULL
) ? bfd_section_name (input_bfd
, sec
) : name
;
2186 bfd_boolean unresolved_reloc
;
2188 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2189 r_symndx
, symtab_hdr
, sym_hashes
,
2191 unresolved_reloc
, warned
);
2195 if (sec
!= NULL
&& elf_discarded_section (sec
))
2197 /* For relocs against symbols from removed linkonce sections,
2198 or sections discarded by a linker script, we just want the
2199 section contents zeroed. Avoid any special processing. */
2200 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
2206 if (info
->relocatable
)
2210 && (h
->root
.type
== bfd_link_hash_defined
2211 || h
->root
.type
== bfd_link_hash_defweak
)
2212 && !BFINFDPIC_SYM_LOCAL (info
, h
))
2221 case R_pcrel24_jump_l
:
2223 if (! IS_FDPIC (output_bfd
))
2226 case R_BFIN_GOT17M4
:
2229 case R_BFIN_FUNCDESC_GOT17M4
:
2230 case R_BFIN_FUNCDESC_GOTHI
:
2231 case R_BFIN_FUNCDESC_GOTLO
:
2232 case R_BFIN_GOTOFF17M4
:
2233 case R_BFIN_GOTOFFHI
:
2234 case R_BFIN_GOTOFFLO
:
2235 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2236 case R_BFIN_FUNCDESC_GOTOFFHI
:
2237 case R_BFIN_FUNCDESC_GOTOFFLO
:
2238 case R_BFIN_FUNCDESC
:
2239 case R_BFIN_FUNCDESC_VALUE
:
2241 picrel
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2242 (info
), input_bfd
, h
,
2243 orig_addend
, INSERT
);
2245 /* In order to find the entry we created before, we must
2246 use the original addend, not the one that may have been
2247 modified by _bfd_elf_rela_local_sym(). */
2248 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2249 (info
), input_bfd
, r_symndx
,
2250 orig_addend
, INSERT
);
2254 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel
, output_bfd
, info
,
2258 (*_bfd_error_handler
)
2259 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2260 input_bfd
, input_section
, rel
->r_offset
, name
);
2270 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2272 info
->callbacks
->warning
2273 (info
, _("relocation references symbol not defined in the module"),
2274 name
, input_bfd
, input_section
, rel
->r_offset
);
2283 case R_pcrel24_jump_l
:
2284 check_segment
[0] = isec_segment
;
2285 if (! IS_FDPIC (output_bfd
))
2286 check_segment
[1] = isec_segment
;
2287 else if (picrel
->plt
)
2289 relocation
= bfinfdpic_plt_section (info
)->output_section
->vma
2290 + bfinfdpic_plt_section (info
)->output_offset
2291 + picrel
->plt_entry
;
2292 check_segment
[1] = plt_segment
;
2294 /* We don't want to warn on calls to undefined weak symbols,
2295 as calls to them must be protected by non-NULL tests
2296 anyway, and unprotected calls would invoke undefined
2298 else if (picrel
->symndx
== -1
2299 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefweak
)
2300 check_segment
[1] = check_segment
[0];
2302 check_segment
[1] = sec
2303 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2307 case R_BFIN_GOT17M4
:
2310 relocation
= picrel
->got_entry
;
2311 check_segment
[0] = check_segment
[1] = got_segment
;
2314 case R_BFIN_FUNCDESC_GOT17M4
:
2315 case R_BFIN_FUNCDESC_GOTHI
:
2316 case R_BFIN_FUNCDESC_GOTLO
:
2317 relocation
= picrel
->fdgot_entry
;
2318 check_segment
[0] = check_segment
[1] = got_segment
;
2321 case R_BFIN_GOTOFFHI
:
2322 case R_BFIN_GOTOFF17M4
:
2323 case R_BFIN_GOTOFFLO
:
2324 relocation
-= bfinfdpic_got_section (info
)->output_section
->vma
2325 + bfinfdpic_got_section (info
)->output_offset
2326 + bfinfdpic_got_initial_offset (info
);
2327 check_segment
[0] = got_segment
;
2328 check_segment
[1] = sec
2329 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2333 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2334 case R_BFIN_FUNCDESC_GOTOFFHI
:
2335 case R_BFIN_FUNCDESC_GOTOFFLO
:
2336 relocation
= picrel
->fd_entry
;
2337 check_segment
[0] = check_segment
[1] = got_segment
;
2340 case R_BFIN_FUNCDESC
:
2343 bfd_vma addend
= rel
->r_addend
;
2345 if (! (h
&& h
->root
.type
== bfd_link_hash_undefweak
2346 && BFINFDPIC_SYM_LOCAL (info
, h
)))
2348 /* If the symbol is dynamic and there may be dynamic
2349 symbol resolution because we are or are linked with a
2350 shared library, emit a FUNCDESC relocation such that
2351 the dynamic linker will allocate the function
2352 descriptor. If the symbol needs a non-local function
2353 descriptor but binds locally (e.g., its visibility is
2354 protected, emit a dynamic relocation decayed to
2356 if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
)
2357 && BFINFDPIC_SYM_LOCAL (info
, h
)
2358 && !(info
->executable
&& !info
->pie
))
2360 dynindx
= elf_section_data (h
->root
.u
.def
.section
2361 ->output_section
)->dynindx
;
2362 addend
+= h
->root
.u
.def
.section
->output_offset
2363 + h
->root
.u
.def
.value
;
2365 else if (h
&& ! BFINFDPIC_FUNCDESC_LOCAL (info
, h
))
2369 info
->callbacks
->warning
2370 (info
, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2371 name
, input_bfd
, input_section
, rel
->r_offset
);
2374 dynindx
= h
->dynindx
;
2378 /* Otherwise, we know we have a private function
2379 descriptor, so reference it directly. */
2380 BFD_ASSERT (picrel
->privfd
);
2381 r_type
= R_byte4_data
;
2382 dynindx
= elf_section_data (bfinfdpic_got_section (info
)
2383 ->output_section
)->dynindx
;
2384 addend
= bfinfdpic_got_section (info
)->output_offset
2385 + bfinfdpic_got_initial_offset (info
)
2389 /* If there is room for dynamic symbol resolution, emit
2390 the dynamic relocation. However, if we're linking an
2391 executable at a fixed location, we won't have emitted a
2392 dynamic symbol entry for the got section, so idx will
2393 be zero, which means we can and should compute the
2394 address of the private descriptor ourselves. */
2395 if (info
->executable
&& !info
->pie
2396 && (!h
|| BFINFDPIC_FUNCDESC_LOCAL (info
, h
)))
2398 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2399 if ((bfd_get_section_flags (output_bfd
,
2400 input_section
->output_section
)
2401 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2403 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2407 info
->callbacks
->warning
2409 _("cannot emit fixups in read-only section"),
2410 name
, input_bfd
, input_section
, rel
->r_offset
);
2413 _bfinfdpic_add_rofixup (output_bfd
,
2414 bfinfdpic_gotfixup_section
2416 _bfd_elf_section_offset
2418 input_section
, rel
->r_offset
)
2420 ->output_section
->vma
2421 + input_section
->output_offset
,
2425 else if ((bfd_get_section_flags (output_bfd
,
2426 input_section
->output_section
)
2427 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2431 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2435 info
->callbacks
->warning
2437 _("cannot emit dynamic relocations in read-only section"),
2438 name
, input_bfd
, input_section
, rel
->r_offset
);
2441 offset
= _bfd_elf_section_offset (output_bfd
, info
,
2442 input_section
, rel
->r_offset
);
2443 /* Only output a reloc for a not deleted entry. */
2444 if (offset
>= (bfd_vma
) -2)
2445 _bfinfdpic_add_dyn_reloc (output_bfd
,
2446 bfinfdpic_gotrel_section (info
),
2449 dynindx
, addend
, picrel
);
2451 _bfinfdpic_add_dyn_reloc (output_bfd
,
2452 bfinfdpic_gotrel_section (info
),
2453 offset
+ input_section
2454 ->output_section
->vma
2455 + input_section
->output_offset
,
2457 dynindx
, addend
, picrel
);
2460 addend
+= bfinfdpic_got_section (info
)->output_section
->vma
;
2463 /* We want the addend in-place because dynamic
2464 relocations are REL. Setting relocation to it should
2465 arrange for it to be installed. */
2466 relocation
= addend
- rel
->r_addend
;
2468 check_segment
[0] = check_segment
[1] = got_segment
;
2472 if (! IS_FDPIC (output_bfd
))
2474 check_segment
[0] = check_segment
[1] = -1;
2478 case R_BFIN_FUNCDESC_VALUE
:
2481 bfd_vma addend
= rel
->r_addend
;
2483 /* If the symbol is dynamic but binds locally, use
2485 if (h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
))
2487 if (addend
&& r_type
== R_BFIN_FUNCDESC_VALUE
)
2489 info
->callbacks
->warning
2490 (info
, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2491 name
, input_bfd
, input_section
, rel
->r_offset
);
2494 dynindx
= h
->dynindx
;
2499 addend
+= h
->root
.u
.def
.value
;
2501 addend
+= sym
->st_value
;
2503 addend
+= osec
->output_offset
;
2504 if (osec
&& osec
->output_section
2505 && ! bfd_is_abs_section (osec
->output_section
)
2506 && ! bfd_is_und_section (osec
->output_section
))
2507 dynindx
= elf_section_data (osec
->output_section
)->dynindx
;
2512 /* If we're linking an executable at a fixed address, we
2513 can omit the dynamic relocation as long as the symbol
2514 is defined in the current link unit (which is implied
2515 by its output section not being NULL). */
2516 if (info
->executable
&& !info
->pie
2517 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2520 addend
+= osec
->output_section
->vma
;
2521 if (IS_FDPIC (input_bfd
)
2522 && (bfd_get_section_flags (output_bfd
,
2523 input_section
->output_section
)
2524 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2526 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2530 info
->callbacks
->warning
2532 _("cannot emit fixups in read-only section"),
2533 name
, input_bfd
, input_section
, rel
->r_offset
);
2536 if (!h
|| h
->root
.type
!= bfd_link_hash_undefweak
)
2538 _bfinfdpic_add_rofixup (output_bfd
,
2539 bfinfdpic_gotfixup_section
2541 _bfd_elf_section_offset
2543 input_section
, rel
->r_offset
)
2545 ->output_section
->vma
2546 + input_section
->output_offset
,
2548 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2549 _bfinfdpic_add_rofixup
2551 bfinfdpic_gotfixup_section (info
),
2552 _bfd_elf_section_offset
2554 input_section
, rel
->r_offset
)
2555 + input_section
->output_section
->vma
2556 + input_section
->output_offset
+ 4, picrel
);
2562 if ((bfd_get_section_flags (output_bfd
,
2563 input_section
->output_section
)
2564 & (SEC_ALLOC
| SEC_LOAD
)) == (SEC_ALLOC
| SEC_LOAD
))
2566 if (_bfinfdpic_osec_readonly_p (output_bfd
,
2570 info
->callbacks
->warning
2572 _("cannot emit dynamic relocations in read-only section"),
2573 name
, input_bfd
, input_section
, rel
->r_offset
);
2576 _bfinfdpic_add_dyn_reloc (output_bfd
,
2577 bfinfdpic_gotrel_section (info
),
2578 _bfd_elf_section_offset
2580 input_section
, rel
->r_offset
)
2582 ->output_section
->vma
2583 + input_section
->output_offset
,
2584 r_type
, dynindx
, addend
, picrel
);
2587 addend
+= osec
->output_section
->vma
;
2588 /* We want the addend in-place because dynamic
2589 relocations are REL. Setting relocation to it
2590 should arrange for it to be installed. */
2591 relocation
= addend
- rel
->r_addend
;
2594 if (r_type
== R_BFIN_FUNCDESC_VALUE
)
2596 /* If we've omitted the dynamic relocation, just emit
2597 the fixed addresses of the symbol and of the local
2599 if (info
->executable
&& !info
->pie
2600 && (!h
|| BFINFDPIC_SYM_LOCAL (info
, h
)))
2601 bfd_put_32 (output_bfd
,
2602 bfinfdpic_got_section (info
)->output_section
->vma
2603 + bfinfdpic_got_section (info
)->output_offset
2604 + bfinfdpic_got_initial_offset (info
),
2605 contents
+ rel
->r_offset
+ 4);
2607 /* A function descriptor used for lazy or local
2608 resolving is initialized such that its high word
2609 contains the output section index in which the
2610 PLT entries are located, and the low word
2611 contains the offset of the lazy PLT entry entry
2612 point into that section. */
2613 bfd_put_32 (output_bfd
,
2614 h
&& ! BFINFDPIC_SYM_LOCAL (info
, h
)
2616 : _bfinfdpic_osec_to_segment (output_bfd
,
2619 contents
+ rel
->r_offset
+ 4);
2622 check_segment
[0] = check_segment
[1] = got_segment
;
2626 check_segment
[0] = isec_segment
;
2627 check_segment
[1] = sec
2628 ? _bfinfdpic_osec_to_segment (output_bfd
, sec
->output_section
)
2633 if (check_segment
[0] != check_segment
[1] && IS_FDPIC (output_bfd
))
2635 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
2636 in the ld testsuite. */
2637 /* This helps catch problems in GCC while we can't do more
2638 than static linking. The idea is to test whether the
2639 input file basename is crt0.o only once. */
2640 if (silence_segment_error
== 1)
2641 silence_segment_error
=
2642 (strlen (input_bfd
->filename
) == 6
2643 && strcmp (input_bfd
->filename
, "crt0.o") == 0)
2644 || (strlen (input_bfd
->filename
) > 6
2645 && strcmp (input_bfd
->filename
2646 + strlen (input_bfd
->filename
) - 7,
2650 if (!silence_segment_error
2651 /* We don't want duplicate errors for undefined
2653 && !(picrel
&& picrel
->symndx
== -1
2654 && picrel
->d
.h
->root
.type
== bfd_link_hash_undefined
))
2655 info
->callbacks
->warning
2657 (info
->shared
|| info
->pie
)
2658 ? _("relocations between different segments are not supported")
2659 : _("warning: relocation references a different segment"),
2660 name
, input_bfd
, input_section
, rel
->r_offset
);
2661 if (!silence_segment_error
&& (info
->shared
|| info
->pie
))
2663 elf_elfheader (output_bfd
)->e_flags
|= EF_BFIN_PIC
;
2668 case R_BFIN_GOTOFFHI
:
2669 /* We need the addend to be applied before we shift the
2671 relocation
+= rel
->r_addend
;
2674 case R_BFIN_FUNCDESC_GOTHI
:
2675 case R_BFIN_FUNCDESC_GOTOFFHI
:
2680 case R_BFIN_FUNCDESC_GOTLO
:
2681 case R_BFIN_GOTOFFLO
:
2682 case R_BFIN_FUNCDESC_GOTOFFLO
:
2683 relocation
&= 0xffff;
2693 case R_pcrel24_jump_l
:
2694 if (! IS_FDPIC (output_bfd
) || ! picrel
->plt
)
2698 /* When referencing a GOT entry, a function descriptor or a
2699 PLT, we don't want the addend to apply to the reference,
2700 but rather to the referenced symbol. The actual entry
2701 will have already been created taking the addend into
2702 account, so cancel it out here. */
2703 case R_BFIN_GOT17M4
:
2706 case R_BFIN_FUNCDESC_GOT17M4
:
2707 case R_BFIN_FUNCDESC_GOTHI
:
2708 case R_BFIN_FUNCDESC_GOTLO
:
2709 case R_BFIN_FUNCDESC_GOTOFF17M4
:
2710 case R_BFIN_FUNCDESC_GOTOFFHI
:
2711 case R_BFIN_FUNCDESC_GOTOFFLO
:
2712 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
2713 here, since we do want to apply the addend to the others.
2714 Note that we've applied the addend to GOTOFFHI before we
2715 shifted it right. */
2716 case R_BFIN_GOTOFFHI
:
2717 relocation
-= rel
->r_addend
;
2724 if (r_type
== R_pcrel24
2725 || r_type
== R_pcrel24_jump_l
)
2728 bfd_vma address
= rel
->r_offset
;
2730 relocation
+= rel
->r_addend
;
2732 /* Perform usual pc-relative correction. */
2733 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
2734 relocation
-= address
;
2736 /* We are getting reloc_entry->address 2 byte off from
2737 the start of instruction. Assuming absolute postion
2738 of the reloc data. But, following code had been written assuming
2739 reloc address is starting at begining of instruction.
2740 To compensate that I have increased the value of
2741 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
2748 x
= bfd_get_16 (input_bfd
, contents
+ address
);
2749 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
2750 bfd_put_16 (input_bfd
, x
, contents
+ address
);
2752 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
2753 x
= relocation
& 0xFFFF;
2754 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
2758 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
2759 contents
, rel
->r_offset
,
2760 relocation
, rel
->r_addend
);
2762 if (r
!= bfd_reloc_ok
)
2764 const char * msg
= (const char *) NULL
;
2768 case bfd_reloc_overflow
:
2769 r
= info
->callbacks
->reloc_overflow
2770 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
2771 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
2774 case bfd_reloc_undefined
:
2775 r
= info
->callbacks
->undefined_symbol
2776 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
2779 case bfd_reloc_outofrange
:
2780 msg
= _("internal error: out of range error");
2783 case bfd_reloc_notsupported
:
2784 msg
= _("internal error: unsupported relocation error");
2787 case bfd_reloc_dangerous
:
2788 msg
= _("internal error: dangerous relocation");
2792 msg
= _("internal error: unknown error");
2797 r
= info
->callbacks
->warning
2798 (info
, msg
, name
, input_bfd
, input_section
, rel
->r_offset
);
2809 bfin_relocate_section (bfd
* output_bfd
,
2810 struct bfd_link_info
*info
,
2812 asection
* input_section
,
2813 bfd_byte
* contents
,
2814 Elf_Internal_Rela
* relocs
,
2815 Elf_Internal_Sym
* local_syms
,
2816 asection
** local_sections
)
2819 Elf_Internal_Shdr
*symtab_hdr
;
2820 struct elf_link_hash_entry
**sym_hashes
;
2821 bfd_vma
*local_got_offsets
;
2824 Elf_Internal_Rela
*rel
;
2825 Elf_Internal_Rela
*relend
;
2828 dynobj
= elf_hash_table (info
)->dynobj
;
2829 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2830 sym_hashes
= elf_sym_hashes (input_bfd
);
2831 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2837 relend
= relocs
+ input_section
->reloc_count
;
2838 for (; rel
< relend
; rel
++, i
++)
2841 reloc_howto_type
*howto
;
2842 unsigned long r_symndx
;
2843 struct elf_link_hash_entry
*h
;
2844 Elf_Internal_Sym
*sym
;
2846 bfd_vma relocation
= 0;
2847 bfd_boolean unresolved_reloc
;
2848 bfd_reloc_status_type r
;
2851 r_type
= ELF32_R_TYPE (rel
->r_info
);
2852 if (r_type
< 0 || r_type
>= 243)
2854 bfd_set_error (bfd_error_bad_value
);
2858 if (r_type
== R_BFIN_GNU_VTENTRY
2859 || r_type
== R_BFIN_GNU_VTINHERIT
)
2862 howto
= bfin_reloc_type_lookup (input_bfd
, r_type
);
2865 bfd_set_error (bfd_error_bad_value
);
2868 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2873 unresolved_reloc
= FALSE
;
2875 if (r_symndx
< symtab_hdr
->sh_info
)
2877 sym
= local_syms
+ r_symndx
;
2878 sec
= local_sections
[r_symndx
];
2879 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2885 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2886 r_symndx
, symtab_hdr
, sym_hashes
,
2888 unresolved_reloc
, warned
);
2891 if (sec
!= NULL
&& elf_discarded_section (sec
))
2893 /* For relocs against symbols from removed linkonce sections,
2894 or sections discarded by a linker script, we just want the
2895 section contents zeroed. Avoid any special processing. */
2896 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
2902 if (info
->relocatable
)
2905 address
= rel
->r_offset
;
2907 /* Then, process normally. */
2910 case R_BFIN_GNU_VTINHERIT
:
2911 case R_BFIN_GNU_VTENTRY
:
2912 return bfd_reloc_ok
;
2915 /* Relocation is to the address of the entry for this symbol
2916 in the global offset table. */
2918 && strcmp (h
->root
.root
.string
, "__GLOBAL_OFFSET_TABLE_") == 0)
2921 /* Relocation is the offset of the entry for this symbol in
2922 the global offset table. */
2929 /* Create the .got section. */
2930 elf_hash_table (info
)->dynobj
= dynobj
= output_bfd
;
2931 if (!_bfd_elf_create_got_section (dynobj
, info
))
2937 sgot
= bfd_get_section_by_name (dynobj
, ".got");
2938 BFD_ASSERT (sgot
!= NULL
);
2945 off
= h
->got
.offset
;
2946 BFD_ASSERT (off
!= (bfd_vma
) - 1);
2947 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
2949 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2956 /* This is actually a static link, or it is a
2957 -Bsymbolic link and the symbol is defined
2958 locally, or the symbol was forced to be local
2959 because of a version file.. We must initialize
2960 this entry in the global offset table. Since
2961 the offset must always be a multiple of 4, we
2962 use the least significant bit to record whether
2963 we have initialized it already.
2965 When doing a dynamic link, we create a .rela.got
2966 relocation entry to initialize the value. This
2967 is done in the finish_dynamic_symbol routine. */
2972 bfd_put_32 (output_bfd
, relocation
,
2973 sgot
->contents
+ off
);
2978 unresolved_reloc
= FALSE
;
2982 BFD_ASSERT (local_got_offsets
!= NULL
);
2983 off
= local_got_offsets
[r_symndx
];
2984 BFD_ASSERT (off
!= (bfd_vma
) - 1);
2986 /* The offset must always be a multiple of 4. We use
2987 the least significant bit to record whether we have
2988 already generated the necessary reloc. */
2993 bfd_put_32 (output_bfd
, relocation
, sgot
->contents
+ off
);
2998 Elf_Internal_Rela outrel
;
3001 s
= bfd_get_section_by_name (dynobj
, ".rela.got");
3002 BFD_ASSERT (s
!= NULL
);
3004 outrel
.r_offset
= (sgot
->output_section
->vma
3005 + sgot
->output_offset
+ off
);
3007 ELF32_R_INFO (0, R_pcrel24
);
3008 outrel
.r_addend
= relocation
;
3011 s
->reloc_count
++ * sizeof (Elf32_External_Rela
);
3012 bfd_elf32_swap_reloca_out (output_bfd
, &outrel
, loc
);
3015 local_got_offsets
[r_symndx
] |= 1;
3019 relocation
= sgot
->output_offset
+ off
;
3021 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
3027 case R_pcrel24_jump_l
:
3031 relocation
+= rel
->r_addend
;
3033 /* Perform usual pc-relative correction. */
3034 relocation
-= input_section
->output_section
->vma
+ input_section
->output_offset
;
3035 relocation
-= address
;
3037 /* We are getting reloc_entry->address 2 byte off from
3038 the start of instruction. Assuming absolute postion
3039 of the reloc data. But, following code had been written assuming
3040 reloc address is starting at begining of instruction.
3041 To compensate that I have increased the value of
3042 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
3049 x
= bfd_get_16 (input_bfd
, contents
+ address
);
3050 x
= (x
& 0xff00) | ((relocation
>> 16) & 0xff);
3051 bfd_put_16 (input_bfd
, x
, contents
+ address
);
3053 x
= bfd_get_16 (input_bfd
, contents
+ address
+ 2);
3054 x
= relocation
& 0xFFFF;
3055 bfd_put_16 (input_bfd
, x
, contents
+ address
+ 2);
3062 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3064 relocation
, rel
->r_addend
);
3069 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3070 because such sections are not SEC_ALLOC and thus ld.so will
3071 not process them. */
3072 if (unresolved_reloc
3073 && !((input_section
->flags
& SEC_DEBUGGING
) != 0 && h
->def_dynamic
))
3075 (*_bfd_error_handler
)
3076 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3078 input_section
, (long) rel
->r_offset
, h
->root
.root
.string
);
3082 if (r
!= bfd_reloc_ok
)
3087 name
= h
->root
.root
.string
;
3090 name
= bfd_elf_string_from_elf_section (input_bfd
,
3091 symtab_hdr
->sh_link
,
3096 name
= bfd_section_name (input_bfd
, sec
);
3099 if (r
== bfd_reloc_overflow
)
3101 if (!(info
->callbacks
->reloc_overflow
3102 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3103 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
)))
3108 (*_bfd_error_handler
)
3109 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3110 input_bfd
, input_section
,
3111 (long) rel
->r_offset
, name
, (int) r
);
3121 bfin_gc_mark_hook (asection
* sec
,
3122 struct bfd_link_info
*info
,
3123 Elf_Internal_Rela
* rel
,
3124 struct elf_link_hash_entry
*h
,
3125 Elf_Internal_Sym
* sym
)
3128 switch (ELF32_R_TYPE (rel
->r_info
))
3130 case R_BFIN_GNU_VTINHERIT
:
3131 case R_BFIN_GNU_VTENTRY
:
3135 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
3138 /* Update the got entry reference counts for the section being removed. */
3141 bfin_gc_sweep_hook (bfd
* abfd
,
3142 struct bfd_link_info
*info
,
3144 const Elf_Internal_Rela
* relocs
)
3146 Elf_Internal_Shdr
*symtab_hdr
;
3147 struct elf_link_hash_entry
**sym_hashes
;
3148 bfd_signed_vma
*local_got_refcounts
;
3149 const Elf_Internal_Rela
*rel
, *relend
;
3154 dynobj
= elf_hash_table (info
)->dynobj
;
3158 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3159 sym_hashes
= elf_sym_hashes (abfd
);
3160 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3162 sgot
= bfd_get_section_by_name (dynobj
, ".got");
3163 srelgot
= bfd_get_section_by_name (dynobj
, ".rela.got");
3165 relend
= relocs
+ sec
->reloc_count
;
3166 for (rel
= relocs
; rel
< relend
; rel
++)
3168 unsigned long r_symndx
;
3169 struct elf_link_hash_entry
*h
;
3171 switch (ELF32_R_TYPE (rel
->r_info
))
3174 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3175 if (r_symndx
>= symtab_hdr
->sh_info
)
3177 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
3178 if (h
->got
.refcount
> 0)
3181 if (h
->got
.refcount
== 0)
3183 /* We don't need the .got entry any more. */
3185 srelgot
->size
-= sizeof (Elf32_External_Rela
);
3189 else if (local_got_refcounts
!= NULL
)
3191 if (local_got_refcounts
[r_symndx
] > 0)
3193 --local_got_refcounts
[r_symndx
];
3194 if (local_got_refcounts
[r_symndx
] == 0)
3196 /* We don't need the .got entry any more. */
3199 srelgot
->size
-= sizeof (Elf32_External_Rela
);
3211 /* We need dynamic symbols for every section, since segments can
3212 relocate independently. */
3214 _bfinfdpic_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
3215 struct bfd_link_info
*info
3217 asection
*p ATTRIBUTE_UNUSED
)
3219 switch (elf_section_data (p
)->this_hdr
.sh_type
)
3223 /* If sh_type is yet undecided, assume it could be
3224 SHT_PROGBITS/SHT_NOBITS. */
3228 /* There shouldn't be section relative relocations
3229 against any other section. */
3235 /* Create a .got section, as well as its additional info field. This
3236 is almost entirely copied from
3237 elflink.c:_bfd_elf_create_got_section(). */
3240 _bfin_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
3242 flagword flags
, pltflags
;
3244 struct elf_link_hash_entry
*h
;
3245 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3249 /* This function may be called more than once. */
3250 s
= bfd_get_section_by_name (abfd
, ".got");
3251 if (s
!= NULL
&& (s
->flags
& SEC_LINKER_CREATED
) != 0)
3254 /* Machine specific: although pointers are 32-bits wide, we want the
3255 GOT to be aligned to a 64-bit boundary, such that function
3256 descriptors in it can be accessed with 64-bit loads and
3260 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3261 | SEC_LINKER_CREATED
);
3264 s
= bfd_make_section_with_flags (abfd
, ".got", flags
);
3266 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3269 if (bed
->want_got_plt
)
3271 s
= bfd_make_section_with_flags (abfd
, ".got.plt", flags
);
3273 || !bfd_set_section_alignment (abfd
, s
, ptralign
))
3277 if (bed
->want_got_sym
)
3279 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3280 (or .got.plt) section. We don't do this in the linker script
3281 because we don't want to define the symbol if we are not creating
3282 a global offset table. */
3283 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "__GLOBAL_OFFSET_TABLE_");
3284 elf_hash_table (info
)->hgot
= h
;
3288 /* Machine-specific: we want the symbol for executables as
3290 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3294 /* The first bit of the global offset table is the header. */
3295 s
->size
+= bed
->got_header_size
;
3297 /* This is the machine-specific part. Create and initialize section
3298 data for the got. */
3299 if (IS_FDPIC (abfd
))
3301 bfinfdpic_got_section (info
) = s
;
3302 bfinfdpic_relocs_info (info
) = htab_try_create (1,
3303 bfinfdpic_relocs_info_hash
,
3304 bfinfdpic_relocs_info_eq
,
3306 if (! bfinfdpic_relocs_info (info
))
3309 s
= bfd_make_section_with_flags (abfd
, ".rel.got",
3310 (flags
| SEC_READONLY
));
3312 || ! bfd_set_section_alignment (abfd
, s
, 2))
3315 bfinfdpic_gotrel_section (info
) = s
;
3317 /* Machine-specific. */
3318 s
= bfd_make_section_with_flags (abfd
, ".rofixup",
3319 (flags
| SEC_READONLY
));
3321 || ! bfd_set_section_alignment (abfd
, s
, 2))
3324 bfinfdpic_gotfixup_section (info
) = s
;
3331 flags
= BSF_GLOBAL
| BSF_WEAK
;
3337 /* Make sure the got and plt sections exist, and that our pointers in
3338 the link hash table point to them. */
3341 elf32_bfinfdpic_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3343 /* This is mostly copied from
3344 elflink.c:_bfd_elf_create_dynamic_sections(). */
3345 flagword flags
, pltflags
;
3347 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3349 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3350 .rel[a].bss sections. */
3352 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
3353 | SEC_LINKER_CREATED
);
3356 pltflags
|= SEC_CODE
;
3357 if (bed
->plt_not_loaded
)
3358 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
3359 if (bed
->plt_readonly
)
3360 pltflags
|= SEC_READONLY
;
3362 s
= bfd_make_section_with_flags (abfd
, ".plt", pltflags
);
3364 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
3366 /* Blackfin-specific: remember it. */
3367 bfinfdpic_plt_section (info
) = s
;
3369 if (bed
->want_plt_sym
)
3371 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3373 struct elf_link_hash_entry
*h
;
3374 struct bfd_link_hash_entry
*bh
= NULL
;
3376 if (! (_bfd_generic_link_add_one_symbol
3377 (info
, abfd
, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL
, s
, 0, NULL
,
3378 FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
3380 h
= (struct elf_link_hash_entry
*) bh
;
3382 h
->type
= STT_OBJECT
;
3384 if (! info
->executable
3385 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
3389 /* Blackfin-specific: we want rel relocations for the plt. */
3390 s
= bfd_make_section_with_flags (abfd
, ".rel.plt", flags
| SEC_READONLY
);
3392 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3394 /* Blackfin-specific: remember it. */
3395 bfinfdpic_pltrel_section (info
) = s
;
3397 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3398 if (! _bfin_create_got_section (abfd
, info
))
3401 /* Blackfin-specific: make sure we created everything we wanted. */
3402 BFD_ASSERT (bfinfdpic_got_section (info
) && bfinfdpic_gotrel_section (info
)
3403 /* && bfinfdpic_gotfixup_section (info) */
3404 && bfinfdpic_plt_section (info
)
3405 && bfinfdpic_pltrel_section (info
));
3407 if (bed
->want_dynbss
)
3409 /* The .dynbss section is a place to put symbols which are defined
3410 by dynamic objects, are referenced by regular objects, and are
3411 not functions. We must allocate space for them in the process
3412 image and use a R_*_COPY reloc to tell the dynamic linker to
3413 initialize them at run time. The linker script puts the .dynbss
3414 section into the .bss section of the final image. */
3415 s
= bfd_make_section_with_flags (abfd
, ".dynbss",
3416 SEC_ALLOC
| SEC_LINKER_CREATED
);
3420 /* The .rel[a].bss section holds copy relocs. This section is not
3421 normally needed. We need to create it here, though, so that the
3422 linker will map it to an output section. We can't just create it
3423 only if we need it, because we will not know whether we need it
3424 until we have seen all the input files, and the first time the
3425 main linker code calls BFD after examining all the input files
3426 (size_dynamic_sections) the input sections have already been
3427 mapped to the output sections. If the section turns out not to
3428 be needed, we can discard it later. We will never need this
3429 section when generating a shared object, since they do not use
3433 s
= bfd_make_section_with_flags (abfd
,
3434 (bed
->default_use_rela_p
3435 ? ".rela.bss" : ".rel.bss"),
3436 flags
| SEC_READONLY
);
3438 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
3446 /* The name of the dynamic interpreter. This is put in the .interp
3449 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3451 #define DEFAULT_STACK_SIZE 0x20000
3453 /* This structure is used to collect the number of entries present in
3454 each addressable range of the got. */
3455 struct _bfinfdpic_dynamic_got_info
3457 /* Several bits of information about the current link. */
3458 struct bfd_link_info
*info
;
3459 /* Total size needed for GOT entries within the 18- or 32-bit
3461 bfd_vma got17m4
, gothilo
;
3462 /* Total size needed for function descriptor entries within the 18-
3463 or 32-bit ranges. */
3464 bfd_vma fd17m4
, fdhilo
;
3465 /* Total size needed function descriptor entries referenced in PLT
3466 entries, that would be profitable to place in offsets close to
3467 the PIC register. */
3469 /* Total size needed by lazy PLT entries. */
3471 /* Number of relocations carried over from input object files. */
3472 unsigned long relocs
;
3473 /* Number of fixups introduced by relocations in input object files. */
3474 unsigned long fixups
;
3477 /* Compute the total GOT size required by each symbol in each range.
3478 Symbols may require up to 4 words in the GOT: an entry pointing to
3479 the symbol, an entry pointing to its function descriptor, and a
3480 private function descriptors taking two words. */
3483 _bfinfdpic_count_got_plt_entries (void **entryp
, void *dinfo_
)
3485 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3486 struct _bfinfdpic_dynamic_got_info
*dinfo
= dinfo_
;
3487 unsigned relocs
= 0, fixups
= 0;
3489 /* Allocate space for a GOT entry pointing to the symbol. */
3491 dinfo
->got17m4
+= 4;
3492 else if (entry
->gothilo
)
3493 dinfo
->gothilo
+= 4;
3498 /* Allocate space for a GOT entry pointing to the function
3500 if (entry
->fdgot17m4
)
3501 dinfo
->got17m4
+= 4;
3502 else if (entry
->fdgothilo
)
3503 dinfo
->gothilo
+= 4;
3508 /* Decide whether we need a PLT entry, a function descriptor in the
3509 GOT, and a lazy PLT entry for this symbol. */
3510 entry
->plt
= entry
->call
3511 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3512 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3513 entry
->privfd
= entry
->plt
3514 || entry
->fdgoff17m4
|| entry
->fdgoffhilo
3515 || ((entry
->fd
|| entry
->fdgot17m4
|| entry
->fdgothilo
)
3516 && (entry
->symndx
!= -1
3517 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
)));
3518 entry
->lazyplt
= entry
->privfd
3519 && entry
->symndx
== -1 && ! BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
)
3520 && ! (dinfo
->info
->flags
& DF_BIND_NOW
)
3521 && elf_hash_table (dinfo
->info
)->dynamic_sections_created
;
3523 /* Allocate space for a function descriptor. */
3524 if (entry
->fdgoff17m4
)
3526 else if (entry
->privfd
&& entry
->plt
)
3528 else if (entry
->privfd
)
3535 dinfo
->lzplt
+= LZPLT_NORMAL_SIZE
;
3537 if (!dinfo
->info
->executable
|| dinfo
->info
->pie
)
3538 relocs
= entry
->relocs32
+ entry
->relocsfd
+ entry
->relocsfdv
;
3541 if (entry
->symndx
!= -1 || BFINFDPIC_SYM_LOCAL (dinfo
->info
, entry
->d
.h
))
3543 if (entry
->symndx
!= -1
3544 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3545 fixups
+= entry
->relocs32
+ 2 * entry
->relocsfdv
;
3548 relocs
+= entry
->relocs32
+ entry
->relocsfdv
;
3550 if (entry
->symndx
!= -1
3551 || BFINFDPIC_FUNCDESC_LOCAL (dinfo
->info
, entry
->d
.h
))
3553 if (entry
->symndx
!= -1
3554 || entry
->d
.h
->root
.type
!= bfd_link_hash_undefweak
)
3555 fixups
+= entry
->relocsfd
;
3558 relocs
+= entry
->relocsfd
;
3561 entry
->dynrelocs
+= relocs
;
3562 entry
->fixups
+= fixups
;
3563 dinfo
->relocs
+= relocs
;
3564 dinfo
->fixups
+= fixups
;
3569 /* This structure is used to assign offsets to got entries, function
3570 descriptors, plt entries and lazy plt entries. */
3572 struct _bfinfdpic_dynamic_got_plt_info
3574 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3575 struct _bfinfdpic_dynamic_got_info g
;
3577 /* For each addressable range, we record a MAX (positive) and MIN
3578 (negative) value. CUR is used to assign got entries, and it's
3579 incremented from an initial positive value to MAX, then from MIN
3580 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3581 assign function descriptors, and it's decreased from an initial
3582 non-positive value to MIN, then from MAX down to CUR (unless CUR
3583 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3584 to even words. ODD, if non-zero, indicates an odd word to be
3585 used for the next got entry, otherwise CUR is used and
3586 incremented by a pair of words, wrapping around when it reaches
3587 MAX. FDCUR is decremented (and wrapped) before the next function
3588 descriptor is chosen. FDPLT indicates the number of remaining
3589 slots that can be used for function descriptors used only by PLT
3591 struct _bfinfdpic_dynamic_got_alloc_data
3593 bfd_signed_vma max
, cur
, odd
, fdcur
, min
;
3598 /* Determine the positive and negative ranges to be used by each
3599 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3600 double-word boundary, are the minimum (negative) and maximum
3601 (positive) GOT offsets already used by previous ranges, except for
3602 an ODD entry that may have been left behind. GOT and FD indicate
3603 the size of GOT entries and function descriptors that must be
3604 placed within the range from -WRAP to WRAP. If there's room left,
3605 up to FDPLT bytes should be reserved for additional function
3608 inline static bfd_signed_vma
3609 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data
*gad
,
3610 bfd_signed_vma fdcur
,
3618 bfd_signed_vma wrapmin
= -wrap
;
3620 /* Start at the given initial points. */
3624 /* If we had an incoming odd word and we have any got entries that
3625 are going to use it, consume it, otherwise leave gad->odd at
3626 zero. We might force gad->odd to zero and return the incoming
3627 odd such that it is used by the next range, but then GOT entries
3628 might appear to be out of order and we wouldn't be able to
3629 shorten the GOT by one word if it turns out to end with an
3630 unpaired GOT entry. */
3640 /* If we're left with an unpaired GOT entry, compute its location
3641 such that we can return it. Otherwise, if got doesn't require an
3642 odd number of words here, either odd was already zero in the
3643 block above, or it was set to zero because got was non-zero, or
3644 got was already zero. In the latter case, we want the value of
3645 odd to carry over to the return statement, so we don't want to
3646 reset odd unless the condition below is true. */
3653 /* Compute the tentative boundaries of this range. */
3654 gad
->max
= cur
+ got
;
3655 gad
->min
= fdcur
- fd
;
3658 /* If function descriptors took too much space, wrap some of them
3660 if (gad
->min
< wrapmin
)
3662 gad
->max
+= wrapmin
- gad
->min
;
3665 /* If there is space left and we have function descriptors
3666 referenced in PLT entries that could take advantage of shorter
3667 offsets, place them here. */
3668 else if (fdplt
&& gad
->min
> wrapmin
)
3671 if ((bfd_vma
) (gad
->min
- wrapmin
) < fdplt
)
3672 fds
= gad
->min
- wrapmin
;
3681 /* If GOT entries took too much space, wrap some of them around.
3682 This may well cause gad->min to become lower than wrapmin. This
3683 will cause a relocation overflow later on, so we don't have to
3685 if ((bfd_vma
) gad
->max
> wrap
)
3687 gad
->min
-= gad
->max
- wrap
;
3690 /* If there is more space left, try to place some more function
3691 descriptors for PLT entries. */
3692 else if (fdplt
&& (bfd_vma
) gad
->max
< wrap
)
3695 if ((bfd_vma
) (wrap
- gad
->max
) < fdplt
)
3696 fds
= wrap
- gad
->max
;
3705 /* If odd was initially computed as an offset past the wrap point,
3708 odd
= gad
->min
+ odd
- gad
->max
;
3710 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3711 before returning, so do it here too. This guarantees that,
3712 should cur and fdcur meet at the wrap point, they'll both be
3714 if (gad
->cur
== gad
->max
)
3715 gad
->cur
= gad
->min
;
3720 /* Compute the location of the next GOT entry, given the allocation
3721 data for a range. */
3723 inline static bfd_signed_vma
3724 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3730 /* If there was an odd word left behind, use it. */
3736 /* Otherwise, use the word pointed to by cur, reserve the next
3737 as an odd word, and skip to the next pair of words, possibly
3740 gad
->odd
= gad
->cur
+ 4;
3742 if (gad
->cur
== gad
->max
)
3743 gad
->cur
= gad
->min
;
3749 /* Compute the location of the next function descriptor entry in the
3750 GOT, given the allocation data for a range. */
3752 inline static bfd_signed_vma
3753 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data
*gad
)
3755 /* If we're at the bottom, wrap around, and only then allocate the
3756 next pair of words. */
3757 if (gad
->fdcur
== gad
->min
)
3758 gad
->fdcur
= gad
->max
;
3759 return gad
->fdcur
-= 8;
3762 /* Assign GOT offsets for every GOT entry and function descriptor.
3763 Doing everything in a single pass is tricky. */
3766 _bfinfdpic_assign_got_entries (void **entryp
, void *info_
)
3768 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3769 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3772 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3773 else if (entry
->gothilo
)
3774 entry
->got_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3776 if (entry
->fdgot17m4
)
3777 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->got17m4
);
3778 else if (entry
->fdgothilo
)
3779 entry
->fdgot_entry
= _bfinfdpic_get_got_entry (&dinfo
->gothilo
);
3781 if (entry
->fdgoff17m4
)
3782 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3783 else if (entry
->plt
&& dinfo
->got17m4
.fdplt
)
3785 dinfo
->got17m4
.fdplt
-= 8;
3786 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3788 else if (entry
->plt
)
3790 dinfo
->gothilo
.fdplt
-= 8;
3791 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3793 else if (entry
->privfd
)
3794 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3799 /* Assign GOT offsets to private function descriptors used by PLT
3800 entries (or referenced by 32-bit offsets), as well as PLT entries
3801 and lazy PLT entries. */
3804 _bfinfdpic_assign_plt_entries (void **entryp
, void *info_
)
3806 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3807 struct _bfinfdpic_dynamic_got_plt_info
*dinfo
= info_
;
3809 /* If this symbol requires a local function descriptor, allocate
3811 if (entry
->privfd
&& entry
->fd_entry
== 0)
3813 if (dinfo
->got17m4
.fdplt
)
3815 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->got17m4
);
3816 dinfo
->got17m4
.fdplt
-= 8;
3820 BFD_ASSERT (dinfo
->gothilo
.fdplt
);
3821 entry
->fd_entry
= _bfinfdpic_get_fd_entry (&dinfo
->gothilo
);
3822 dinfo
->gothilo
.fdplt
-= 8;
3830 /* We use the section's raw size to mark the location of the
3832 entry
->plt_entry
= bfinfdpic_plt_section (dinfo
->g
.info
)->size
;
3834 /* Figure out the length of this PLT entry based on the
3835 addressing mode we need to reach the function descriptor. */
3836 BFD_ASSERT (entry
->fd_entry
);
3837 if (entry
->fd_entry
>= -(1 << (18 - 1))
3838 && entry
->fd_entry
+ 4 < (1 << (18 - 1)))
3843 bfinfdpic_plt_section (dinfo
->g
.info
)->size
+= size
;
3848 entry
->lzplt_entry
= dinfo
->g
.lzplt
;
3849 dinfo
->g
.lzplt
+= LZPLT_NORMAL_SIZE
;
3850 /* If this entry is the one that gets the resolver stub, account
3851 for the additional instruction. */
3852 if (entry
->lzplt_entry
% BFINFDPIC_LZPLT_BLOCK_SIZE
3853 == BFINFDPIC_LZPLT_RESOLV_LOC
)
3854 dinfo
->g
.lzplt
+= LZPLT_RESOLVER_EXTRA
;
3860 /* Follow indirect and warning hash entries so that each got entry
3861 points to the final symbol definition. P must point to a pointer
3862 to the hash table we're traversing. Since this traversal may
3863 modify the hash table, we set this pointer to NULL to indicate
3864 we've made a potentially-destructive change to the hash table, so
3865 the traversal must be restarted. */
3867 _bfinfdpic_resolve_final_relocs_info (void **entryp
, void *p
)
3869 struct bfinfdpic_relocs_info
*entry
= *entryp
;
3872 if (entry
->symndx
== -1)
3874 struct elf_link_hash_entry
*h
= entry
->d
.h
;
3875 struct bfinfdpic_relocs_info
*oentry
;
3877 while (h
->root
.type
== bfd_link_hash_indirect
3878 || h
->root
.type
== bfd_link_hash_warning
)
3879 h
= (struct elf_link_hash_entry
*)h
->root
.u
.i
.link
;
3881 if (entry
->d
.h
== h
)
3884 oentry
= bfinfdpic_relocs_info_for_global (*htab
, 0, h
, entry
->addend
,
3889 /* Merge the two entries. */
3890 bfinfdpic_pic_merge_early_relocs_info (oentry
, entry
);
3891 htab_clear_slot (*htab
, entryp
);
3897 /* If we can't find this entry with the new bfd hash, re-insert
3898 it, and get the traversal restarted. */
3899 if (! htab_find (*htab
, entry
))
3901 htab_clear_slot (*htab
, entryp
);
3902 entryp
= htab_find_slot (*htab
, entry
, INSERT
);
3905 /* Abort the traversal, since the whole table may have
3906 moved, and leave it up to the parent to restart the
3908 *(htab_t
*)p
= NULL
;
3916 /* Set the sizes of the dynamic sections. */
3919 elf32_bfinfdpic_size_dynamic_sections (bfd
*output_bfd
,
3920 struct bfd_link_info
*info
)
3924 struct _bfinfdpic_dynamic_got_plt_info gpinfo
;
3928 dynobj
= elf_hash_table (info
)->dynobj
;
3929 BFD_ASSERT (dynobj
!= NULL
);
3931 if (elf_hash_table (info
)->dynamic_sections_created
)
3933 /* Set the contents of the .interp section to the interpreter. */
3934 if (info
->executable
)
3936 s
= bfd_get_section_by_name (dynobj
, ".interp");
3937 BFD_ASSERT (s
!= NULL
);
3938 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
3939 s
->contents
= (bfd_byte
*) ELF_DYNAMIC_INTERPRETER
;
3943 memset (&gpinfo
, 0, sizeof (gpinfo
));
3944 gpinfo
.g
.info
= info
;
3948 htab_t relocs
= bfinfdpic_relocs_info (info
);
3950 htab_traverse (relocs
, _bfinfdpic_resolve_final_relocs_info
, &relocs
);
3952 if (relocs
== bfinfdpic_relocs_info (info
))
3956 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_count_got_plt_entries
,
3960 /* Compute the total size taken by entries in the 18-bit range,
3961 to tell how many PLT function descriptors we can bring into it
3962 without causing it to overflow. */
3963 limit
= odd
+ gpinfo
.g
.got17m4
+ gpinfo
.g
.fd17m4
;
3964 if (limit
< (bfd_vma
)1 << 18)
3965 limit
= ((bfd_vma
)1 << 18) - limit
;
3968 if (gpinfo
.g
.fdplt
< limit
)
3969 limit
= gpinfo
.g
.fdplt
;
3971 /* Determine the ranges of GOT offsets that we can use for each
3972 range of addressing modes. */
3973 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfo
.got17m4
,
3980 (bfd_vma
)1 << (18-1));
3981 odd
= _bfinfdpic_compute_got_alloc_data (&gpinfo
.gothilo
,
3987 gpinfo
.g
.fdplt
- gpinfo
.got17m4
.fdplt
,
3988 (bfd_vma
)1 << (32-1));
3990 /* Now assign (most) GOT offsets. */
3991 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_got_entries
,
3994 bfinfdpic_got_section (info
)->size
= gpinfo
.gothilo
.max
3995 - gpinfo
.gothilo
.min
3996 /* If an odd word is the last word of the GOT, we don't need this
3997 word to be part of the GOT. */
3998 - (odd
+ 4 == gpinfo
.gothilo
.max
? 4 : 0);
3999 if (bfinfdpic_got_section (info
)->size
== 0)
4000 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
4001 else if (bfinfdpic_got_section (info
)->size
== 12
4002 && ! elf_hash_table (info
)->dynamic_sections_created
)
4004 bfinfdpic_got_section (info
)->flags
|= SEC_EXCLUDE
;
4005 bfinfdpic_got_section (info
)->size
= 0;
4009 bfinfdpic_got_section (info
)->contents
=
4010 (bfd_byte
*) bfd_zalloc (dynobj
,
4011 bfinfdpic_got_section (info
)->size
);
4012 if (bfinfdpic_got_section (info
)->contents
== NULL
)
4016 if (elf_hash_table (info
)->dynamic_sections_created
)
4017 /* Subtract the number of lzplt entries, since those will generate
4018 relocations in the pltrel section. */
4019 bfinfdpic_gotrel_section (info
)->size
=
4020 (gpinfo
.g
.relocs
- gpinfo
.g
.lzplt
/ LZPLT_NORMAL_SIZE
)
4021 * get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
4023 BFD_ASSERT (gpinfo
.g
.relocs
== 0);
4024 if (bfinfdpic_gotrel_section (info
)->size
== 0)
4025 bfinfdpic_gotrel_section (info
)->flags
|= SEC_EXCLUDE
;
4028 bfinfdpic_gotrel_section (info
)->contents
=
4029 (bfd_byte
*) bfd_zalloc (dynobj
,
4030 bfinfdpic_gotrel_section (info
)->size
);
4031 if (bfinfdpic_gotrel_section (info
)->contents
== NULL
)
4035 bfinfdpic_gotfixup_section (info
)->size
= (gpinfo
.g
.fixups
+ 1) * 4;
4036 if (bfinfdpic_gotfixup_section (info
)->size
== 0)
4037 bfinfdpic_gotfixup_section (info
)->flags
|= SEC_EXCLUDE
;
4040 bfinfdpic_gotfixup_section (info
)->contents
=
4041 (bfd_byte
*) bfd_zalloc (dynobj
,
4042 bfinfdpic_gotfixup_section (info
)->size
);
4043 if (bfinfdpic_gotfixup_section (info
)->contents
== NULL
)
4047 if (elf_hash_table (info
)->dynamic_sections_created
)
4049 bfinfdpic_pltrel_section (info
)->size
=
4050 gpinfo
.g
.lzplt
/ LZPLT_NORMAL_SIZE
* get_elf_backend_data (output_bfd
)->s
->sizeof_rel
;
4051 if (bfinfdpic_pltrel_section (info
)->size
== 0)
4052 bfinfdpic_pltrel_section (info
)->flags
|= SEC_EXCLUDE
;
4055 bfinfdpic_pltrel_section (info
)->contents
=
4056 (bfd_byte
*) bfd_zalloc (dynobj
,
4057 bfinfdpic_pltrel_section (info
)->size
);
4058 if (bfinfdpic_pltrel_section (info
)->contents
== NULL
)
4063 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4064 such that there's room for the additional instruction needed to
4065 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4066 account for them, our block size is 4 bytes smaller than the real
4068 if (elf_hash_table (info
)->dynamic_sections_created
)
4070 bfinfdpic_plt_section (info
)->size
= gpinfo
.g
.lzplt
4071 + ((gpinfo
.g
.lzplt
+ (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) - LZPLT_NORMAL_SIZE
)
4072 / (BFINFDPIC_LZPLT_BLOCK_SIZE
- 4) * LZPLT_RESOLVER_EXTRA
);
4075 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4076 actually assign lazy PLT entries addresses. */
4079 /* Save information that we're going to need to generate GOT and PLT
4081 bfinfdpic_got_initial_offset (info
) = -gpinfo
.gothilo
.min
;
4083 if (get_elf_backend_data (output_bfd
)->want_got_sym
)
4084 elf_hash_table (info
)->hgot
->root
.u
.def
.value
4085 += bfinfdpic_got_initial_offset (info
);
4087 if (elf_hash_table (info
)->dynamic_sections_created
)
4088 bfinfdpic_plt_initial_offset (info
) =
4089 bfinfdpic_plt_section (info
)->size
;
4091 htab_traverse (bfinfdpic_relocs_info (info
), _bfinfdpic_assign_plt_entries
,
4094 /* Allocate the PLT section contents only after
4095 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4096 non-lazy PLT entries. */
4097 if (elf_hash_table (info
)->dynamic_sections_created
)
4099 if (bfinfdpic_plt_section (info
)->size
== 0)
4100 bfinfdpic_plt_section (info
)->flags
|= SEC_EXCLUDE
;
4103 bfinfdpic_plt_section (info
)->contents
=
4104 (bfd_byte
*) bfd_zalloc (dynobj
,
4105 bfinfdpic_plt_section (info
)->size
);
4106 if (bfinfdpic_plt_section (info
)->contents
== NULL
)
4111 if (elf_hash_table (info
)->dynamic_sections_created
)
4113 if (bfinfdpic_got_section (info
)->size
)
4114 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTGOT
, 0))
4117 if (bfinfdpic_pltrel_section (info
)->size
)
4118 if (!_bfd_elf_add_dynamic_entry (info
, DT_PLTRELSZ
, 0)
4119 || !_bfd_elf_add_dynamic_entry (info
, DT_PLTREL
, DT_REL
)
4120 || !_bfd_elf_add_dynamic_entry (info
, DT_JMPREL
, 0))
4123 if (bfinfdpic_gotrel_section (info
)->size
)
4124 if (!_bfd_elf_add_dynamic_entry (info
, DT_REL
, 0)
4125 || !_bfd_elf_add_dynamic_entry (info
, DT_RELSZ
, 0)
4126 || !_bfd_elf_add_dynamic_entry (info
, DT_RELENT
,
4127 sizeof (Elf32_External_Rel
)))
4135 elf32_bfinfdpic_always_size_sections (bfd
*output_bfd
,
4136 struct bfd_link_info
*info
)
4138 if (!info
->relocatable
)
4140 struct elf_link_hash_entry
*h
;
4142 /* Force a PT_GNU_STACK segment to be created. */
4143 if (! elf_tdata (output_bfd
)->stack_flags
)
4144 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
| PF_X
;
4146 /* Define __stacksize if it's not defined yet. */
4147 h
= elf_link_hash_lookup (elf_hash_table (info
), "__stacksize",
4148 FALSE
, FALSE
, FALSE
);
4149 if (! h
|| h
->root
.type
!= bfd_link_hash_defined
4150 || h
->type
!= STT_OBJECT
4153 struct bfd_link_hash_entry
*bh
= NULL
;
4155 if (!(_bfd_generic_link_add_one_symbol
4156 (info
, output_bfd
, "__stacksize",
4157 BSF_GLOBAL
, bfd_abs_section_ptr
, DEFAULT_STACK_SIZE
,
4158 (const char *) NULL
, FALSE
,
4159 get_elf_backend_data (output_bfd
)->collect
, &bh
)))
4162 h
= (struct elf_link_hash_entry
*) bh
;
4164 h
->type
= STT_OBJECT
;
4172 elf32_bfinfdpic_modify_program_headers (bfd
*output_bfd
,
4173 struct bfd_link_info
*info
)
4175 struct elf_obj_tdata
*tdata
= elf_tdata (output_bfd
);
4176 struct elf_segment_map
*m
;
4177 Elf_Internal_Phdr
*p
;
4179 /* objcopy and strip preserve what's already there using
4180 elf32_bfinfdpic_copy_private_bfd_data (). */
4184 for (p
= tdata
->phdr
, m
= tdata
->segment_map
; m
!= NULL
; m
= m
->next
, p
++)
4185 if (m
->p_type
== PT_GNU_STACK
)
4190 struct elf_link_hash_entry
*h
;
4192 /* Obtain the pointer to the __stacksize symbol. */
4193 h
= elf_link_hash_lookup (elf_hash_table (info
), "__stacksize",
4194 FALSE
, FALSE
, FALSE
);
4197 while (h
->root
.type
== bfd_link_hash_indirect
4198 || h
->root
.type
== bfd_link_hash_warning
)
4199 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4200 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
);
4203 /* Set the header p_memsz from the symbol value. We
4204 intentionally ignore the symbol section. */
4205 if (h
&& h
->root
.type
== bfd_link_hash_defined
)
4206 p
->p_memsz
= h
->root
.u
.def
.value
;
4208 p
->p_memsz
= DEFAULT_STACK_SIZE
;
4217 elf32_bfinfdpic_finish_dynamic_sections (bfd
*output_bfd
,
4218 struct bfd_link_info
*info
)
4223 dynobj
= elf_hash_table (info
)->dynobj
;
4225 if (bfinfdpic_got_section (info
))
4227 BFD_ASSERT (bfinfdpic_gotrel_section (info
)->size
4228 == (bfinfdpic_gotrel_section (info
)->reloc_count
4229 * sizeof (Elf32_External_Rel
)));
4231 if (bfinfdpic_gotfixup_section (info
))
4233 struct elf_link_hash_entry
*hgot
= elf_hash_table (info
)->hgot
;
4234 bfd_vma got_value
= hgot
->root
.u
.def
.value
4235 + hgot
->root
.u
.def
.section
->output_section
->vma
4236 + hgot
->root
.u
.def
.section
->output_offset
;
4238 _bfinfdpic_add_rofixup (output_bfd
, bfinfdpic_gotfixup_section (info
),
4241 if (bfinfdpic_gotfixup_section (info
)->size
4242 != (bfinfdpic_gotfixup_section (info
)->reloc_count
* 4))
4244 (*_bfd_error_handler
)
4245 ("LINKER BUG: .rofixup section size mismatch");
4250 if (elf_hash_table (info
)->dynamic_sections_created
)
4252 BFD_ASSERT (bfinfdpic_pltrel_section (info
)->size
4253 == (bfinfdpic_pltrel_section (info
)->reloc_count
4254 * sizeof (Elf32_External_Rel
)));
4257 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4259 if (elf_hash_table (info
)->dynamic_sections_created
)
4261 Elf32_External_Dyn
* dyncon
;
4262 Elf32_External_Dyn
* dynconend
;
4264 BFD_ASSERT (sdyn
!= NULL
);
4266 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4267 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4269 for (; dyncon
< dynconend
; dyncon
++)
4271 Elf_Internal_Dyn dyn
;
4273 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4281 dyn
.d_un
.d_ptr
= bfinfdpic_got_section (info
)->output_section
->vma
4282 + bfinfdpic_got_section (info
)->output_offset
4283 + bfinfdpic_got_initial_offset (info
);
4284 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4288 dyn
.d_un
.d_ptr
= bfinfdpic_pltrel_section (info
)
4289 ->output_section
->vma
4290 + bfinfdpic_pltrel_section (info
)->output_offset
;
4291 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4295 dyn
.d_un
.d_val
= bfinfdpic_pltrel_section (info
)->size
;
4296 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4305 /* Adjust a symbol defined by a dynamic object and referenced by a
4309 elf32_bfinfdpic_adjust_dynamic_symbol
4310 (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4311 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
)
4315 dynobj
= elf_hash_table (info
)->dynobj
;
4317 /* Make sure we know what is going on here. */
4318 BFD_ASSERT (dynobj
!= NULL
4319 && (h
->u
.weakdef
!= NULL
4322 && !h
->def_regular
)));
4324 /* If this is a weak symbol, and there is a real definition, the
4325 processor independent code will have arranged for us to see the
4326 real definition first, and we can just use the same value. */
4327 if (h
->u
.weakdef
!= NULL
)
4329 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
4330 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
4331 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
4332 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
4338 /* Perform any actions needed for dynamic symbols. */
4341 elf32_bfinfdpic_finish_dynamic_symbol
4342 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4343 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4344 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
4345 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4350 /* Decide whether to attempt to turn absptr or lsda encodings in
4351 shared libraries into pcrel within the given input section. */
4354 bfinfdpic_elf_use_relative_eh_frame
4355 (bfd
*input_bfd ATTRIBUTE_UNUSED
,
4356 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4357 asection
*eh_frame_section ATTRIBUTE_UNUSED
)
4359 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4363 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4366 bfinfdpic_elf_encode_eh_address (bfd
*abfd
,
4367 struct bfd_link_info
*info
,
4368 asection
*osec
, bfd_vma offset
,
4369 asection
*loc_sec
, bfd_vma loc_offset
,
4372 struct elf_link_hash_entry
*h
;
4374 h
= elf_hash_table (info
)->hgot
;
4375 BFD_ASSERT (h
&& h
->root
.type
== bfd_link_hash_defined
);
4377 if (! h
|| (_bfinfdpic_osec_to_segment (abfd
, osec
)
4378 == _bfinfdpic_osec_to_segment (abfd
, loc_sec
->output_section
)))
4379 return _bfd_elf_encode_eh_address (abfd
, info
, osec
, offset
,
4380 loc_sec
, loc_offset
, encoded
);
4382 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd
, osec
)
4383 == (_bfinfdpic_osec_to_segment
4384 (abfd
, h
->root
.u
.def
.section
->output_section
)));
4386 *encoded
= osec
->vma
+ offset
4387 - (h
->root
.u
.def
.value
4388 + h
->root
.u
.def
.section
->output_section
->vma
4389 + h
->root
.u
.def
.section
->output_offset
);
4391 return DW_EH_PE_datarel
| DW_EH_PE_sdata4
;
4396 /* Look through the relocs for a section during the first phase.
4398 Besides handling virtual table relocs for gc, we have to deal with
4399 all sorts of PIC-related relocations. We describe below the
4400 general plan on how to handle such relocations, even though we only
4401 collect information at this point, storing them in hash tables for
4402 perusal of later passes.
4404 32 relocations are propagated to the linker output when creating
4405 position-independent output. LO16 and HI16 relocations are not
4406 supposed to be encountered in this case.
4408 LABEL16 should always be resolvable by the linker, since it's only
4411 LABEL24, on the other hand, is used by calls. If it turns out that
4412 the target of a call is a dynamic symbol, a PLT entry must be
4413 created for it, which triggers the creation of a private function
4414 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4416 GPREL relocations require the referenced symbol to be in the same
4417 segment as _gp, but this can only be checked later.
4419 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4420 exist. LABEL24 might as well, since it may require a PLT entry,
4421 that will require a got.
4423 Non-FUNCDESC GOT relocations require a GOT entry to be created
4424 regardless of whether the symbol is dynamic. However, since a
4425 global symbol that turns out to not be exported may have the same
4426 address of a non-dynamic symbol, we don't assign GOT entries at
4427 this point, such that we can share them in this case. A relocation
4428 for the GOT entry always has to be created, be it to offset a
4429 private symbol by the section load address, be it to get the symbol
4430 resolved dynamically.
4432 FUNCDESC GOT relocations require a GOT entry to be created, and
4433 handled as if a FUNCDESC relocation was applied to the GOT entry in
4436 FUNCDESC relocations referencing a symbol that turns out to NOT be
4437 dynamic cause a private function descriptor to be created. The
4438 FUNCDESC relocation then decays to a 32 relocation that points at
4439 the private descriptor. If the symbol is dynamic, the FUNCDESC
4440 relocation is propagated to the linker output, such that the
4441 dynamic linker creates the canonical descriptor, pointing to the
4442 dynamically-resolved definition of the function.
4444 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4445 symbols that are assigned to the same segment as the GOT, but we
4446 can only check this later, after we know the complete set of
4447 symbols defined and/or exported.
4449 FUNCDESC GOTOFF relocations require a function descriptor to be
4450 created and, unless lazy binding is disabled or the symbol is not
4451 dynamic, a lazy PLT entry. Since we can't tell at this point
4452 whether a symbol is going to be dynamic, we have to decide later
4453 whether to create a lazy PLT entry or bind the descriptor directly
4454 to the private function.
4456 FUNCDESC_VALUE relocations are not supposed to be present in object
4457 files, but they may very well be simply propagated to the linker
4458 output, since they have no side effect.
4461 A function descriptor always requires a FUNCDESC_VALUE relocation.
4462 Whether it's in .plt.rel or not depends on whether lazy binding is
4463 enabled and on whether the referenced symbol is dynamic.
4465 The existence of a lazy PLT requires the resolverStub lazy PLT
4466 entry to be present.
4469 As for assignment of GOT, PLT and lazy PLT entries, and private
4470 descriptors, we might do them all sequentially, but we can do
4471 better than that. For example, we can place GOT entries and
4472 private function descriptors referenced using 12-bit operands
4473 closer to the PIC register value, such that these relocations don't
4474 overflow. Those that are only referenced with LO16 relocations
4475 could come next, but we may as well place PLT-required function
4476 descriptors in the 12-bit range to make them shorter. Symbols
4477 referenced with LO16/HI16 may come next, but we may place
4478 additional function descriptors in the 16-bit range if we can
4479 reliably tell that we've already placed entries that are ever
4480 referenced with only LO16. PLT entries are therefore generated as
4481 small as possible, while not introducing relocation overflows in
4482 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4483 generated before or after PLT entries, but not intermingled with
4484 them, such that we can have more lazy PLT entries in range for a
4485 branch to the resolverStub. The resolverStub should be emitted at
4486 the most distant location from the first lazy PLT entry such that
4487 it's still in range for a branch, or closer, if there isn't a need
4488 for so many lazy PLT entries. Additional lazy PLT entries may be
4489 emitted after the resolverStub, as long as branches are still in
4490 range. If the branch goes out of range, longer lazy PLT entries
4493 We could further optimize PLT and lazy PLT entries by giving them
4494 priority in assignment to closer-to-gr17 locations depending on the
4495 number of occurrences of references to them (assuming a function
4496 that's called more often is more important for performance, so its
4497 PLT entry should be faster), or taking hints from the compiler.
4498 Given infinite time and money... :-) */
4501 bfinfdpic_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
4502 asection
*sec
, const Elf_Internal_Rela
*relocs
)
4504 Elf_Internal_Shdr
*symtab_hdr
;
4505 struct elf_link_hash_entry
**sym_hashes
;
4506 const Elf_Internal_Rela
*rel
;
4507 const Elf_Internal_Rela
*rel_end
;
4509 struct bfinfdpic_relocs_info
*picrel
;
4511 if (info
->relocatable
)
4514 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4515 sym_hashes
= elf_sym_hashes (abfd
);
4517 dynobj
= elf_hash_table (info
)->dynobj
;
4518 rel_end
= relocs
+ sec
->reloc_count
;
4519 for (rel
= relocs
; rel
< rel_end
; rel
++)
4521 struct elf_link_hash_entry
*h
;
4522 unsigned long r_symndx
;
4524 r_symndx
= ELF32_R_SYM (rel
->r_info
);
4525 if (r_symndx
< symtab_hdr
->sh_info
)
4528 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
4530 switch (ELF32_R_TYPE (rel
->r_info
))
4532 case R_BFIN_GOT17M4
:
4535 case R_BFIN_FUNCDESC_GOT17M4
:
4536 case R_BFIN_FUNCDESC_GOTHI
:
4537 case R_BFIN_FUNCDESC_GOTLO
:
4538 case R_BFIN_GOTOFF17M4
:
4539 case R_BFIN_GOTOFFHI
:
4540 case R_BFIN_GOTOFFLO
:
4541 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4542 case R_BFIN_FUNCDESC_GOTOFFHI
:
4543 case R_BFIN_FUNCDESC_GOTOFFLO
:
4544 case R_BFIN_FUNCDESC
:
4545 case R_BFIN_FUNCDESC_VALUE
:
4546 if (! IS_FDPIC (abfd
))
4550 case R_pcrel24_jump_l
:
4552 if (IS_FDPIC (abfd
) && ! dynobj
)
4554 elf_hash_table (info
)->dynobj
= dynobj
= abfd
;
4555 if (! _bfin_create_got_section (abfd
, info
))
4558 if (! IS_FDPIC (abfd
))
4565 if (h
->dynindx
== -1)
4566 switch (ELF_ST_VISIBILITY (h
->other
))
4572 bfd_elf_link_record_dynamic_symbol (info
, h
);
4576 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info
),
4578 rel
->r_addend
, INSERT
);
4581 picrel
= bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4582 (info
), abfd
, r_symndx
,
4583 rel
->r_addend
, INSERT
);
4593 switch (ELF32_R_TYPE (rel
->r_info
))
4596 case R_pcrel24_jump_l
:
4597 if (IS_FDPIC (abfd
))
4601 case R_BFIN_FUNCDESC_VALUE
:
4602 picrel
->relocsfdv
++;
4603 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4608 if (! IS_FDPIC (abfd
))
4612 if (bfd_get_section_flags (abfd
, sec
) & SEC_ALLOC
)
4616 case R_BFIN_GOT17M4
:
4617 picrel
->got17m4
= 1;
4622 picrel
->gothilo
= 1;
4625 case R_BFIN_FUNCDESC_GOT17M4
:
4626 picrel
->fdgot17m4
= 1;
4629 case R_BFIN_FUNCDESC_GOTHI
:
4630 case R_BFIN_FUNCDESC_GOTLO
:
4631 picrel
->fdgothilo
= 1;
4634 case R_BFIN_GOTOFF17M4
:
4635 case R_BFIN_GOTOFFHI
:
4636 case R_BFIN_GOTOFFLO
:
4640 case R_BFIN_FUNCDESC_GOTOFF17M4
:
4641 picrel
->fdgoff17m4
= 1;
4644 case R_BFIN_FUNCDESC_GOTOFFHI
:
4645 case R_BFIN_FUNCDESC_GOTOFFLO
:
4646 picrel
->fdgoffhilo
= 1;
4649 case R_BFIN_FUNCDESC
:
4654 /* This relocation describes the C++ object vtable hierarchy.
4655 Reconstruct it for later use during GC. */
4656 case R_BFIN_GNU_VTINHERIT
:
4657 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
4661 /* This relocation describes which C++ vtable entries are actually
4662 used. Record for later use during GC. */
4663 case R_BFIN_GNU_VTENTRY
:
4664 BFD_ASSERT (h
!= NULL
);
4666 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
4672 case R_pcrel12_jump_s
:
4678 (*_bfd_error_handler
)
4679 (_("%B: unsupported relocation type %i"),
4680 abfd
, ELF32_R_TYPE (rel
->r_info
));
4688 /* Set the right machine number for a Blackfin ELF file. */
4691 elf32_bfin_object_p (bfd
*abfd
)
4693 bfd_default_set_arch_mach (abfd
, bfd_arch_bfin
, 0);
4694 return (((elf_elfheader (abfd
)->e_flags
& EF_BFIN_FDPIC
) != 0)
4695 == (IS_FDPIC (abfd
)));
4699 elf32_bfin_set_private_flags (bfd
* abfd
, flagword flags
)
4701 elf_elfheader (abfd
)->e_flags
= flags
;
4702 elf_flags_init (abfd
) = TRUE
;
4706 /* Copy backend specific data from one object module to another. */
4709 bfin_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4711 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4712 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4715 BFD_ASSERT (!elf_flags_init (obfd
)
4716 || elf_elfheader (obfd
)->e_flags
== elf_elfheader (ibfd
)->e_flags
);
4718 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
4719 elf_flags_init (obfd
) = TRUE
;
4721 /* Copy object attributes. */
4722 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
4728 elf32_bfinfdpic_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4732 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
4733 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
4736 if (! bfin_elf_copy_private_bfd_data (ibfd
, obfd
))
4739 if (! elf_tdata (ibfd
) || ! elf_tdata (ibfd
)->phdr
4740 || ! elf_tdata (obfd
) || ! elf_tdata (obfd
)->phdr
)
4743 /* Copy the stack size. */
4744 for (i
= 0; i
< elf_elfheader (ibfd
)->e_phnum
; i
++)
4745 if (elf_tdata (ibfd
)->phdr
[i
].p_type
== PT_GNU_STACK
)
4747 Elf_Internal_Phdr
*iphdr
= &elf_tdata (ibfd
)->phdr
[i
];
4749 for (i
= 0; i
< elf_elfheader (obfd
)->e_phnum
; i
++)
4750 if (elf_tdata (obfd
)->phdr
[i
].p_type
== PT_GNU_STACK
)
4752 memcpy (&elf_tdata (obfd
)->phdr
[i
], iphdr
, sizeof (*iphdr
));
4754 /* Rewrite the phdrs, since we're only called after they
4755 were first written. */
4756 if (bfd_seek (obfd
, (bfd_signed_vma
) get_elf_backend_data (obfd
)
4757 ->s
->sizeof_ehdr
, SEEK_SET
) != 0
4758 || get_elf_backend_data (obfd
)->s
4759 ->write_out_phdrs (obfd
, elf_tdata (obfd
)->phdr
,
4760 elf_elfheader (obfd
)->e_phnum
) != 0)
4772 /* Display the flags field. */
4774 elf32_bfin_print_private_bfd_data (bfd
* abfd
, PTR ptr
)
4776 FILE *file
= (FILE *) ptr
;
4779 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
4781 /* Print normal ELF private data. */
4782 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
4784 flags
= elf_elfheader (abfd
)->e_flags
;
4786 /* xgettext:c-format */
4787 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
4789 if (flags
& EF_BFIN_PIC
)
4790 fprintf (file
, " -fpic");
4792 if (flags
& EF_BFIN_FDPIC
)
4793 fprintf (file
, " -mfdpic");
4800 /* Merge backend specific data from an object file to the output
4801 object file when linking. */
4804 elf32_bfin_merge_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
4806 flagword old_flags
, new_flags
;
4807 bfd_boolean error
= FALSE
;
4809 new_flags
= elf_elfheader (ibfd
)->e_flags
;
4810 old_flags
= elf_elfheader (obfd
)->e_flags
;
4812 if (new_flags
& EF_BFIN_FDPIC
)
4813 new_flags
&= ~EF_BFIN_PIC
;
4816 (*_bfd_error_handler
) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4817 old_flags
, new_flags
, elf_flags_init (obfd
) ? "yes" : "no",
4818 bfd_get_filename (ibfd
));
4821 if (!elf_flags_init (obfd
)) /* First call, no flags set. */
4823 elf_flags_init (obfd
) = TRUE
;
4824 elf_elfheader (obfd
)->e_flags
= new_flags
;
4827 if (((new_flags
& EF_BFIN_FDPIC
) == 0) != (! IS_FDPIC (obfd
)))
4830 if (IS_FDPIC (obfd
))
4831 (*_bfd_error_handler
)
4832 (_("%s: cannot link non-fdpic object file into fdpic executable"),
4833 bfd_get_filename (ibfd
));
4835 (*_bfd_error_handler
)
4836 (_("%s: cannot link fdpic object file into non-fdpic executable"),
4837 bfd_get_filename (ibfd
));
4841 bfd_set_error (bfd_error_bad_value
);
4846 /* bfin ELF linker hash entry. */
4848 struct bfin_link_hash_entry
4850 struct elf_link_hash_entry root
;
4852 /* Number of PC relative relocs copied for this symbol. */
4853 struct bfin_pcrel_relocs_copied
*pcrel_relocs_copied
;
4856 /* bfin ELF linker hash table. */
4858 struct bfin_link_hash_table
4860 struct elf_link_hash_table root
;
4862 /* Small local sym to section mapping cache. */
4863 struct sym_sec_cache sym_sec
;
4866 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4868 static struct bfd_hash_entry
*
4869 bfin_link_hash_newfunc (struct bfd_hash_entry
*entry
,
4870 struct bfd_hash_table
*table
, const char *string
)
4872 struct bfd_hash_entry
*ret
= entry
;
4874 /* Allocate the structure if it has not already been allocated by a
4877 ret
= bfd_hash_allocate (table
, sizeof (struct bfin_link_hash_entry
));
4881 /* Call the allocation method of the superclass. */
4882 ret
= _bfd_elf_link_hash_newfunc (ret
, table
, string
);
4884 bfin_hash_entry (ret
)->pcrel_relocs_copied
= NULL
;
4889 /* Create an bfin ELF linker hash table. */
4891 static struct bfd_link_hash_table
*
4892 bfin_link_hash_table_create (bfd
* abfd
)
4894 struct bfin_link_hash_table
*ret
;
4895 bfd_size_type amt
= sizeof (struct bfin_link_hash_table
);
4897 ret
= bfd_zalloc (abfd
, amt
);
4901 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
4902 bfin_link_hash_newfunc
,
4903 sizeof (struct elf_link_hash_entry
)))
4909 ret
->sym_sec
.abfd
= NULL
;
4911 return &ret
->root
.root
;
4914 /* The size in bytes of an entry in the procedure linkage table. */
4916 /* Finish up the dynamic sections. */
4919 bfin_finish_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
4920 struct bfd_link_info
*info
)
4925 dynobj
= elf_hash_table (info
)->dynobj
;
4927 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4929 if (elf_hash_table (info
)->dynamic_sections_created
)
4931 Elf32_External_Dyn
*dyncon
, *dynconend
;
4933 BFD_ASSERT (sdyn
!= NULL
);
4935 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4936 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4937 for (; dyncon
< dynconend
; dyncon
++)
4939 Elf_Internal_Dyn dyn
;
4941 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4949 /* Finish up dynamic symbol handling. We set the contents of various
4950 dynamic sections here. */
4953 bfin_finish_dynamic_symbol (bfd
* output_bfd
,
4954 struct bfd_link_info
*info
,
4955 struct elf_link_hash_entry
*h
,
4956 Elf_Internal_Sym
* sym
)
4960 dynobj
= elf_hash_table (info
)->dynobj
;
4962 if (h
->got
.offset
!= (bfd_vma
) - 1)
4966 Elf_Internal_Rela rela
;
4969 /* This symbol has an entry in the global offset table.
4972 sgot
= bfd_get_section_by_name (dynobj
, ".got");
4973 srela
= bfd_get_section_by_name (dynobj
, ".rela.got");
4974 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
4976 rela
.r_offset
= (sgot
->output_section
->vma
4977 + sgot
->output_offset
4978 + (h
->got
.offset
& ~(bfd_vma
) 1));
4980 /* If this is a -Bsymbolic link, and the symbol is defined
4981 locally, we just want to emit a RELATIVE reloc. Likewise if
4982 the symbol was forced to be local because of a version file.
4983 The entry in the global offset table will already have been
4984 initialized in the relocate_section function. */
4987 || h
->dynindx
== -1 || h
->forced_local
) && h
->def_regular
)
4989 fprintf(stderr
, "*** check this relocation %s\n", __FUNCTION__
);
4990 rela
.r_info
= ELF32_R_INFO (0, R_pcrel24
);
4991 rela
.r_addend
= bfd_get_signed_32 (output_bfd
,
4995 offset
& ~(bfd_vma
) 1)));
4999 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5000 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
5001 rela
.r_info
= ELF32_R_INFO (h
->dynindx
, R_got
);
5005 loc
= srela
->contents
;
5006 loc
+= srela
->reloc_count
++ * sizeof (Elf32_External_Rela
);
5007 bfd_elf32_swap_reloca_out (output_bfd
, &rela
, loc
);
5014 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5015 if (strcmp (h
->root
.root
.string
, "__DYNAMIC") == 0
5016 || h
== elf_hash_table (info
)->hgot
)
5017 sym
->st_shndx
= SHN_ABS
;
5022 /* Adjust a symbol defined by a dynamic object and referenced by a
5023 regular object. The current definition is in some section of the
5024 dynamic object, but we're not including those sections. We have to
5025 change the definition to something the rest of the link can
5029 bfin_adjust_dynamic_symbol (struct bfd_link_info
*info
,
5030 struct elf_link_hash_entry
*h
)
5034 unsigned int power_of_two
;
5036 dynobj
= elf_hash_table (info
)->dynobj
;
5038 /* Make sure we know what is going on here. */
5039 BFD_ASSERT (dynobj
!= NULL
5041 || h
->u
.weakdef
!= NULL
5042 || (h
->def_dynamic
&& h
->ref_regular
&& !h
->def_regular
)));
5044 /* If this is a function, put it in the procedure linkage table. We
5045 will fill in the contents of the procedure linkage table later,
5046 when we know the address of the .got section. */
5047 if (h
->type
== STT_FUNC
|| h
->needs_plt
)
5052 /* If this is a weak symbol, and there is a real definition, the
5053 processor independent code will have arranged for us to see the
5054 real definition first, and we can just use the same value. */
5055 if (h
->u
.weakdef
!= NULL
)
5057 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
5058 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
5059 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
5060 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
5064 /* This is a reference to a symbol defined by a dynamic object which
5065 is not a function. */
5067 /* If we are creating a shared library, we must presume that the
5068 only references to the symbol are via the global offset table.
5069 For such cases we need not do anything here; the relocations will
5070 be handled correctly by relocate_section. */
5074 /* We must allocate the symbol in our .dynbss section, which will
5075 become part of the .bss section of the executable. There will be
5076 an entry for this symbol in the .dynsym section. The dynamic
5077 object will contain position independent code, so all references
5078 from the dynamic object to this symbol will go through the global
5079 offset table. The dynamic linker will use the .dynsym entry to
5080 determine the address it must put in the global offset table, so
5081 both the dynamic object and the regular object will refer to the
5082 same memory location for the variable. */
5084 s
= bfd_get_section_by_name (dynobj
, ".dynbss");
5085 BFD_ASSERT (s
!= NULL
);
5087 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5088 copy the initial value out of the dynamic object and into the
5089 runtime process image. We need to remember the offset into the
5090 .rela.bss section we are going to use. */
5091 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
5095 srel
= bfd_get_section_by_name (dynobj
, ".rela.bss");
5096 BFD_ASSERT (srel
!= NULL
);
5097 srel
->size
+= sizeof (Elf32_External_Rela
);
5101 /* We need to figure out the alignment required for this symbol. I
5102 have no idea how ELF linkers handle this. */
5103 power_of_two
= bfd_log2 (h
->size
);
5104 if (power_of_two
> 3)
5107 /* Apply the required alignment. */
5108 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
5109 if (power_of_two
> bfd_get_section_alignment (dynobj
, s
))
5111 if (!bfd_set_section_alignment (dynobj
, s
, power_of_two
))
5115 /* Define the symbol as being at this point in the section. */
5116 h
->root
.u
.def
.section
= s
;
5117 h
->root
.u
.def
.value
= s
->size
;
5119 /* Increment the section size to make room for the symbol. */
5125 /* The bfin linker needs to keep track of the number of relocs that it
5126 decides to copy in check_relocs for each symbol. This is so that it
5127 can discard PC relative relocs if it doesn't need them when linking
5128 with -Bsymbolic. We store the information in a field extending the
5129 regular ELF linker hash table. */
5131 /* This structure keeps track of the number of PC relative relocs we have
5132 copied for a given symbol. */
5134 struct bfin_pcrel_relocs_copied
5137 struct bfin_pcrel_relocs_copied
*next
;
5138 /* A section in dynobj. */
5140 /* Number of relocs copied in this section. */
5141 bfd_size_type count
;
5144 /* This function is called via elf_link_hash_traverse if we are
5145 creating a shared object. In the -Bsymbolic case it discards the
5146 space allocated to copy PC relative relocs against symbols which
5147 are defined in regular objects. For the normal shared case, it
5148 discards space for pc-relative relocs that have become local due to
5149 symbol visibility changes. We allocated space for them in the
5150 check_relocs routine, but we won't fill them in in the
5151 relocate_section routine.
5153 We also check whether any of the remaining relocations apply
5154 against a readonly section, and set the DF_TEXTREL flag in this
5158 bfin_discard_copies (struct elf_link_hash_entry
*h
, PTR inf
)
5160 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5161 struct bfin_pcrel_relocs_copied
*s
;
5163 if (h
->root
.type
== bfd_link_hash_warning
)
5164 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5166 if (!h
->def_regular
|| (!info
->symbolic
&& !h
->forced_local
))
5168 if ((info
->flags
& DF_TEXTREL
) == 0)
5170 /* Look for relocations against read-only sections. */
5171 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5172 s
!= NULL
; s
= s
->next
)
5173 if ((s
->section
->flags
& SEC_READONLY
) != 0)
5175 info
->flags
|= DF_TEXTREL
;
5183 for (s
= bfin_hash_entry (h
)->pcrel_relocs_copied
;
5184 s
!= NULL
; s
= s
->next
)
5185 s
->section
->size
-= s
->count
* sizeof (Elf32_External_Rela
);
5191 bfin_size_dynamic_sections (bfd
* output_bfd ATTRIBUTE_UNUSED
,
5192 struct bfd_link_info
*info
)
5198 dynobj
= elf_hash_table (info
)->dynobj
;
5199 BFD_ASSERT (dynobj
!= NULL
);
5201 if (elf_hash_table (info
)->dynamic_sections_created
)
5203 /* Set the contents of the .interp section to the interpreter. */
5204 if (info
->executable
)
5206 s
= bfd_get_section_by_name (dynobj
, ".interp");
5207 BFD_ASSERT (s
!= NULL
);
5208 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
5209 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
5214 /* We may have created entries in the .rela.got section.
5215 However, if we are not creating the dynamic sections, we will
5216 not actually use these entries. Reset the size of .rela.got,
5217 which will cause it to get stripped from the output file
5219 s
= bfd_get_section_by_name (dynobj
, ".rela.got");
5224 /* If this is a -Bsymbolic shared link, then we need to discard all
5225 PC relative relocs against symbols defined in a regular object.
5226 For the normal shared case we discard the PC relative relocs
5227 against symbols that have become local due to visibility changes.
5228 We allocated space for them in the check_relocs routine, but we
5229 will not fill them in in the relocate_section routine. */
5231 elf_link_hash_traverse (elf_hash_table (info
),
5232 bfin_discard_copies
, (PTR
) info
);
5234 /* The check_relocs and adjust_dynamic_symbol entry points have
5235 determined the sizes of the various dynamic sections. Allocate
5238 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
5243 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
5246 /* It's OK to base decisions on the section name, because none
5247 of the dynobj section names depend upon the input files. */
5248 name
= bfd_get_section_name (dynobj
, s
);
5252 if (CONST_STRNEQ (name
, ".rela"))
5256 /* If we don't need this section, strip it from the
5257 output file. This is mostly to handle .rela.bss and
5258 .rela.plt. We must create both sections in
5259 create_dynamic_sections, because they must be created
5260 before the linker maps input sections to output
5261 sections. The linker does that before
5262 adjust_dynamic_symbol is called, and it is that
5263 function which decides whether anything needs to go
5264 into these sections. */
5271 /* We use the reloc_count field as a counter if we need
5272 to copy relocs into the output file. */
5276 else if (! CONST_STRNEQ (name
, ".got"))
5278 /* It's not one of our sections, so don't allocate space. */
5284 s
->flags
|= SEC_EXCLUDE
;
5288 /* Allocate memory for the section contents. */
5289 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5290 Unused entries should be reclaimed before the section's contents
5291 are written out, but at the moment this does not happen. Thus in
5292 order to prevent writing out garbage, we initialise the section's
5293 contents to zero. */
5294 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
5295 if (s
->contents
== NULL
&& s
->size
!= 0)
5299 if (elf_hash_table (info
)->dynamic_sections_created
)
5301 /* Add some entries to the .dynamic section. We fill in the
5302 values later, in bfin_finish_dynamic_sections, but we
5303 must add the entries now so that we get the correct size for
5304 the .dynamic section. The DT_DEBUG entry is filled in by the
5305 dynamic linker and used by the debugger. */
5306 #define add_dynamic_entry(TAG, VAL) \
5307 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5311 if (!add_dynamic_entry (DT_DEBUG
, 0))
5318 if (!add_dynamic_entry (DT_RELA
, 0)
5319 || !add_dynamic_entry (DT_RELASZ
, 0)
5320 || !add_dynamic_entry (DT_RELAENT
,
5321 sizeof (Elf32_External_Rela
)))
5325 if ((info
->flags
& DF_TEXTREL
) != 0)
5327 if (!add_dynamic_entry (DT_TEXTREL
, 0))
5331 #undef add_dynamic_entry
5336 /* Given a .data section and a .emreloc in-memory section, store
5337 relocation information into the .emreloc section which can be
5338 used at runtime to relocate the section. This is called by the
5339 linker when the --embedded-relocs switch is used. This is called
5340 after the add_symbols entry point has been called for all the
5341 objects, and before the final_link entry point is called. */
5343 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5344 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*, asection
*, char **));
5347 bfd_bfin_elf32_create_embedded_relocs (
5349 struct bfd_link_info
*info
,
5354 Elf_Internal_Shdr
*symtab_hdr
;
5355 Elf_Internal_Sym
*isymbuf
= NULL
;
5356 Elf_Internal_Rela
*internal_relocs
= NULL
;
5357 Elf_Internal_Rela
*irel
, *irelend
;
5361 BFD_ASSERT (! info
->relocatable
);
5365 if (datasec
->reloc_count
== 0)
5368 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5370 /* Get a copy of the native relocations. */
5371 internal_relocs
= (_bfd_elf_link_read_relocs
5372 (abfd
, datasec
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
5373 info
->keep_memory
));
5374 if (internal_relocs
== NULL
)
5377 amt
= (bfd_size_type
) datasec
->reloc_count
* 12;
5378 relsec
->contents
= (bfd_byte
*) bfd_alloc (abfd
, amt
);
5379 if (relsec
->contents
== NULL
)
5382 p
= relsec
->contents
;
5384 irelend
= internal_relocs
+ datasec
->reloc_count
;
5385 for (irel
= internal_relocs
; irel
< irelend
; irel
++, p
+= 12)
5387 asection
*targetsec
;
5389 /* We are going to write a four byte longword into the runtime
5390 reloc section. The longword will be the address in the data
5391 section which must be relocated. It is followed by the name
5392 of the target section NUL-padded or truncated to 8
5395 /* We can only relocate absolute longword relocs at run time. */
5396 if (ELF32_R_TYPE (irel
->r_info
) != (int) R_byte4_data
)
5398 *errmsg
= _("unsupported reloc type");
5399 bfd_set_error (bfd_error_bad_value
);
5403 /* Get the target section referred to by the reloc. */
5404 if (ELF32_R_SYM (irel
->r_info
) < symtab_hdr
->sh_info
)
5406 /* A local symbol. */
5407 Elf_Internal_Sym
*isym
;
5409 /* Read this BFD's local symbols if we haven't done so already. */
5410 if (isymbuf
== NULL
)
5412 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5413 if (isymbuf
== NULL
)
5414 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
5415 symtab_hdr
->sh_info
, 0,
5417 if (isymbuf
== NULL
)
5421 isym
= isymbuf
+ ELF32_R_SYM (irel
->r_info
);
5422 targetsec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
5427 struct elf_link_hash_entry
*h
;
5429 /* An external symbol. */
5430 indx
= ELF32_R_SYM (irel
->r_info
) - symtab_hdr
->sh_info
;
5431 h
= elf_sym_hashes (abfd
)[indx
];
5432 BFD_ASSERT (h
!= NULL
);
5433 if (h
->root
.type
== bfd_link_hash_defined
5434 || h
->root
.type
== bfd_link_hash_defweak
)
5435 targetsec
= h
->root
.u
.def
.section
;
5440 bfd_put_32 (abfd
, irel
->r_offset
+ datasec
->output_offset
, p
);
5441 memset (p
+ 4, 0, 8);
5442 if (targetsec
!= NULL
)
5443 strncpy ((char *) p
+ 4, targetsec
->output_section
->name
, 8);
5446 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5448 if (internal_relocs
!= NULL
5449 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5450 free (internal_relocs
);
5454 if (isymbuf
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isymbuf
)
5456 if (internal_relocs
!= NULL
5457 && elf_section_data (datasec
)->relocs
!= internal_relocs
)
5458 free (internal_relocs
);
5462 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5463 #define TARGET_LITTLE_NAME "elf32-bfin"
5464 #define ELF_ARCH bfd_arch_bfin
5465 #define ELF_MACHINE_CODE EM_BLACKFIN
5466 #define ELF_MAXPAGESIZE 0x1000
5467 #define elf_symbol_leading_char '_'
5469 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5470 #define bfd_elf32_bfd_reloc_name_lookup \
5471 bfin_bfd_reloc_name_lookup
5472 #define elf_info_to_howto bfin_info_to_howto
5473 #define elf_info_to_howto_rel 0
5474 #define elf_backend_object_p elf32_bfin_object_p
5476 #define bfd_elf32_bfd_is_local_label_name \
5477 bfin_is_local_label_name
5478 #define bfin_hash_table(p) \
5479 ((struct bfin_link_hash_table *) (p)->hash)
5483 #define elf_backend_create_dynamic_sections \
5484 _bfd_elf_create_dynamic_sections
5485 #define bfd_elf32_bfd_link_hash_table_create \
5486 bfin_link_hash_table_create
5487 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5489 #define elf_backend_check_relocs bfin_check_relocs
5490 #define elf_backend_adjust_dynamic_symbol \
5491 bfin_adjust_dynamic_symbol
5492 #define elf_backend_size_dynamic_sections \
5493 bfin_size_dynamic_sections
5494 #define elf_backend_relocate_section bfin_relocate_section
5495 #define elf_backend_finish_dynamic_symbol \
5496 bfin_finish_dynamic_symbol
5497 #define elf_backend_finish_dynamic_sections \
5498 bfin_finish_dynamic_sections
5499 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5500 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5501 #define bfd_elf32_bfd_merge_private_bfd_data \
5502 elf32_bfin_merge_private_bfd_data
5503 #define bfd_elf32_bfd_set_private_flags \
5504 elf32_bfin_set_private_flags
5505 #define bfd_elf32_bfd_print_private_bfd_data \
5506 elf32_bfin_print_private_bfd_data
5507 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5508 #define elf_backend_can_gc_sections 1
5509 #define elf_backend_can_refcount 1
5510 #define elf_backend_want_got_plt 0
5511 #define elf_backend_plt_readonly 1
5512 #define elf_backend_want_plt_sym 0
5513 #define elf_backend_got_header_size 12
5514 #define elf_backend_rela_normal 1
5516 #include "elf32-target.h"
5518 #undef TARGET_LITTLE_SYM
5519 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5520 #undef TARGET_LITTLE_NAME
5521 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5523 #define elf32_bed elf32_bfinfdpic_bed
5525 #undef elf_backend_gc_sweep_hook
5527 #undef elf_backend_got_header_size
5528 #define elf_backend_got_header_size 0
5530 #undef elf_backend_relocate_section
5531 #define elf_backend_relocate_section bfinfdpic_relocate_section
5532 #undef elf_backend_check_relocs
5533 #define elf_backend_check_relocs bfinfdpic_check_relocs
5535 #undef bfd_elf32_bfd_link_hash_table_create
5536 #define bfd_elf32_bfd_link_hash_table_create \
5537 bfinfdpic_elf_link_hash_table_create
5538 #undef elf_backend_always_size_sections
5539 #define elf_backend_always_size_sections \
5540 elf32_bfinfdpic_always_size_sections
5541 #undef elf_backend_modify_program_headers
5542 #define elf_backend_modify_program_headers \
5543 elf32_bfinfdpic_modify_program_headers
5544 #undef bfd_elf32_bfd_copy_private_bfd_data
5545 #define bfd_elf32_bfd_copy_private_bfd_data \
5546 elf32_bfinfdpic_copy_private_bfd_data
5548 #undef elf_backend_create_dynamic_sections
5549 #define elf_backend_create_dynamic_sections \
5550 elf32_bfinfdpic_create_dynamic_sections
5551 #undef elf_backend_adjust_dynamic_symbol
5552 #define elf_backend_adjust_dynamic_symbol \
5553 elf32_bfinfdpic_adjust_dynamic_symbol
5554 #undef elf_backend_size_dynamic_sections
5555 #define elf_backend_size_dynamic_sections \
5556 elf32_bfinfdpic_size_dynamic_sections
5557 #undef elf_backend_finish_dynamic_symbol
5558 #define elf_backend_finish_dynamic_symbol \
5559 elf32_bfinfdpic_finish_dynamic_symbol
5560 #undef elf_backend_finish_dynamic_sections
5561 #define elf_backend_finish_dynamic_sections \
5562 elf32_bfinfdpic_finish_dynamic_sections
5564 #undef elf_backend_can_make_relative_eh_frame
5565 #define elf_backend_can_make_relative_eh_frame \
5566 bfinfdpic_elf_use_relative_eh_frame
5567 #undef elf_backend_can_make_lsda_relative_eh_frame
5568 #define elf_backend_can_make_lsda_relative_eh_frame \
5569 bfinfdpic_elf_use_relative_eh_frame
5570 #undef elf_backend_encode_eh_address
5571 #define elf_backend_encode_eh_address \
5572 bfinfdpic_elf_encode_eh_address
5574 #undef elf_backend_may_use_rel_p
5575 #define elf_backend_may_use_rel_p 1
5576 #undef elf_backend_may_use_rela_p
5577 #define elf_backend_may_use_rela_p 1
5578 /* We use REL for dynamic relocations only. */
5579 #undef elf_backend_default_use_rela_p
5580 #define elf_backend_default_use_rela_p 1
5582 #undef elf_backend_omit_section_dynsym
5583 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5585 #include "elf32-target.h"