1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2015 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
29 /* FUNCTION : bfin_pltpc_reloc
30 ABSTRACT : TODO : figure out how to handle pltpc relocs. */
31 static bfd_reloc_status_type
33 bfd *abfd ATTRIBUTE_UNUSED,
34 arelent *reloc_entry ATTRIBUTE_UNUSED,
35 asymbol *symbol ATTRIBUTE_UNUSED,
36 void * data ATTRIBUTE_UNUSED,
37 asection *input_section ATTRIBUTE_UNUSED,
38 bfd *output_bfd ATTRIBUTE_UNUSED,
39 char **error_message ATTRIBUTE_UNUSED)
41 bfd_reloc_status_type flag = bfd_reloc_ok;
46 static bfd_reloc_status_type
47 bfin_pcrel24_reloc (bfd *abfd,
51 asection *input_section,
53 char **error_message ATTRIBUTE_UNUSED)
56 bfd_size_type addr = reloc_entry->address;
57 bfd_vma output_base = 0;
58 reloc_howto_type *howto = reloc_entry->howto;
59 asection *output_section;
60 bfd_boolean relocatable = (output_bfd != NULL);
62 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
63 return bfd_reloc_outofrange;
65 if (bfd_is_und_section (symbol->section)
66 && (symbol->flags & BSF_WEAK) == 0
68 return bfd_reloc_undefined;
70 if (bfd_is_com_section (symbol->section))
73 relocation = symbol->value;
75 output_section = symbol->section->output_section;
80 output_base = output_section->vma;
82 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
83 relocation += output_base + symbol->section->output_offset;
85 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
86 relocation += reloc_entry->addend;
88 relocation -= input_section->output_section->vma + input_section->output_offset;
89 relocation -= reloc_entry->address;
91 if (howto->complain_on_overflow != complain_overflow_dont)
93 bfd_reloc_status_type status;
94 status = bfd_check_overflow (howto->complain_on_overflow,
97 bfd_arch_bits_per_address(abfd),
99 if (status != bfd_reloc_ok)
103 /* if rightshift is 1 and the number odd, return error. */
104 if (howto->rightshift && (relocation & 0x01))
106 (*_bfd_error_handler) (_("relocation should be even number"));
107 return bfd_reloc_overflow;
110 relocation >>= (bfd_vma) howto->rightshift;
111 /* Shift everything up to where it's going to be used. */
113 relocation <<= (bfd_vma) howto->bitpos;
117 reloc_entry->address += input_section->output_offset;
118 reloc_entry->addend += symbol->section->output_offset;
124 /* We are getting reloc_entry->address 2 byte off from
125 the start of instruction. Assuming absolute postion
126 of the reloc data. But, following code had been written assuming
127 reloc address is starting at begining of instruction.
128 To compensate that I have increased the value of
129 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
132 x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2);
133 x = (x & 0xff00) | ((relocation >> 16) & 0xff);
134 bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2);
136 x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
137 x = relocation & 0xFFFF;
138 bfd_put_16 (abfd, x, (unsigned char *) data + addr );
143 static bfd_reloc_status_type
144 bfin_imm16_reloc (bfd *abfd,
145 arelent *reloc_entry,
148 asection *input_section,
150 char **error_message ATTRIBUTE_UNUSED)
152 bfd_vma relocation, x;
153 bfd_size_type reloc_addr = reloc_entry->address;
154 bfd_vma output_base = 0;
155 reloc_howto_type *howto = reloc_entry->howto;
156 asection *output_section;
157 bfd_boolean relocatable = (output_bfd != NULL);
159 /* Is the address of the relocation really within the section? */
160 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
161 return bfd_reloc_outofrange;
163 if (bfd_is_und_section (symbol->section)
164 && (symbol->flags & BSF_WEAK) == 0
166 return bfd_reloc_undefined;
168 output_section = symbol->section->output_section;
169 relocation = symbol->value;
171 /* Convert input-section-relative symbol value to absolute. */
175 output_base = output_section->vma;
177 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
178 relocation += output_base + symbol->section->output_offset;
180 /* Add in supplied addend. */
181 relocation += reloc_entry->addend;
185 reloc_entry->address += input_section->output_offset;
186 reloc_entry->addend += symbol->section->output_offset;
190 reloc_entry->addend = 0;
193 if (howto->complain_on_overflow != complain_overflow_dont)
195 bfd_reloc_status_type flag;
196 flag = bfd_check_overflow (howto->complain_on_overflow,
199 bfd_arch_bits_per_address(abfd),
201 if (flag != bfd_reloc_ok)
205 /* Here the variable relocation holds the final address of the
206 symbol we are relocating against, plus any addend. */
208 relocation >>= (bfd_vma) howto->rightshift;
210 bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr);
215 static bfd_reloc_status_type
216 bfin_byte4_reloc (bfd *abfd,
217 arelent *reloc_entry,
220 asection *input_section,
222 char **error_message ATTRIBUTE_UNUSED)
224 bfd_vma relocation, x;
225 bfd_size_type addr = reloc_entry->address;
226 bfd_vma output_base = 0;
227 asection *output_section;
228 bfd_boolean relocatable = (output_bfd != NULL);
230 /* Is the address of the relocation really within the section? */
231 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
232 return bfd_reloc_outofrange;
234 if (bfd_is_und_section (symbol->section)
235 && (symbol->flags & BSF_WEAK) == 0
237 return bfd_reloc_undefined;
239 output_section = symbol->section->output_section;
240 relocation = symbol->value;
241 /* Convert input-section-relative symbol value to absolute. */
245 output_base = output_section->vma;
248 && symbol->section->name
249 && !strcmp (symbol->name, symbol->section->name))
252 relocation += output_base + symbol->section->output_offset;
255 relocation += reloc_entry->addend;
259 /* This output will be relocatable ... like ld -r. */
260 reloc_entry->address += input_section->output_offset;
261 reloc_entry->addend += symbol->section->output_offset;
265 reloc_entry->addend = 0;
268 /* Here the variable relocation holds the final address of the
269 symbol we are relocating against, plus any addend. */
270 x = relocation & 0xFFFF0000;
272 bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2);
274 x = relocation & 0x0000FFFF;
275 bfd_put_16 (abfd, x, (unsigned char *) data + addr);
279 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
280 Use this instead of bfd_perform_relocation. */
281 static bfd_reloc_status_type
282 bfin_bfd_reloc (bfd *abfd,
283 arelent *reloc_entry,
286 asection *input_section,
288 char **error_message ATTRIBUTE_UNUSED)
291 bfd_size_type addr = reloc_entry->address;
292 bfd_vma output_base = 0;
293 reloc_howto_type *howto = reloc_entry->howto;
294 asection *output_section;
295 bfd_boolean relocatable = (output_bfd != NULL);
297 /* Is the address of the relocation really within the section? */
298 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
299 return bfd_reloc_outofrange;
301 if (bfd_is_und_section (symbol->section)
302 && (symbol->flags & BSF_WEAK) == 0
304 return bfd_reloc_undefined;
306 /* Get symbol value. (Common symbols are special.) */
307 if (bfd_is_com_section (symbol->section))
310 relocation = symbol->value;
312 output_section = symbol->section->output_section;
314 /* Convert input-section-relative symbol value to absolute. */
318 output_base = output_section->vma;
320 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
321 relocation += output_base + symbol->section->output_offset;
323 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
325 /* Add in supplied addend. */
326 relocation += reloc_entry->addend;
329 /* Here the variable relocation holds the final address of the
330 symbol we are relocating against, plus any addend. */
332 if (howto->pc_relative == 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 (*_bfd_error_handler) (_("relocation should be even number"));
363 return bfd_reloc_overflow;
366 relocation >>= (bfd_vma) howto->rightshift;
368 /* Shift everything up to where it's going to be used. */
370 relocation <<= (bfd_vma) howto->bitpos;
373 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
375 /* handle 8 and 16 bit relocations here. */
380 char x = bfd_get_8 (abfd, (char *) data + addr);
382 bfd_put_8 (abfd, x, (unsigned char *) data + addr);
388 unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
390 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr);
395 return bfd_reloc_other;
401 /* HOWTO Table for blackfin.
402 Blackfin relocations are fairly complicated.
403 Some of the salient features are
404 a. Even numbered offsets. A number of (not all) relocations are
405 even numbered. This means that the rightmost bit is not stored.
406 Needs to right shift by 1 and check to see if value is not odd
407 b. A relocation can be an expression. An expression takes on
408 a variety of relocations arranged in a stack.
409 As a result, we cannot use the standard generic function as special
410 function. We will have our own, which is very similar to the standard
411 generic function except that it understands how to get the value from
412 the relocation stack. . */
414 #define BFIN_RELOC_MIN 0
415 #define BFIN_RELOC_MAX 0x21
416 #define BFIN_GNUEXT_RELOC_MIN 0x40
417 #define BFIN_GNUEXT_RELOC_MAX 0x43
418 #define BFIN_ARELOC_MIN 0xE0
419 #define BFIN_ARELOC_MAX 0xF3
421 static reloc_howto_type bfin_howto_table [] =
423 /* This reloc does nothing. . */
424 HOWTO (R_BFIN_UNUSED0, /* type. */
426 3, /* size (0 = byte, 1 = short, 2 = long). */
428 FALSE, /* pc_relative. */
430 complain_overflow_dont, /* complain_on_overflow. */
431 bfd_elf_generic_reloc, /* special_function. */
432 "R_BFIN_UNUSED0", /* name. */
433 FALSE, /* partial_inplace. */
436 FALSE), /* pcrel_offset. */
438 HOWTO (R_BFIN_PCREL5M2, /* type. */
440 1, /* size (0 = byte, 1 = short, 2 = long).. */
442 TRUE, /* pc_relative. */
444 complain_overflow_unsigned, /* complain_on_overflow. */
445 bfin_bfd_reloc, /* special_function. */
446 "R_BFIN_PCREL5M2", /* name. */
447 FALSE, /* partial_inplace. */
449 0x0000000F, /* dst_mask. */
450 FALSE), /* pcrel_offset. */
452 HOWTO (R_BFIN_UNUSED1, /* type. */
454 3, /* size (0 = byte, 1 = short, 2 = long). */
456 FALSE, /* pc_relative. */
458 complain_overflow_dont, /* complain_on_overflow. */
459 bfd_elf_generic_reloc, /* special_function. */
460 "R_BFIN_UNUSED1", /* name. */
461 FALSE, /* partial_inplace. */
464 FALSE), /* pcrel_offset. */
466 HOWTO (R_BFIN_PCREL10, /* type. */
468 1, /* size (0 = byte, 1 = short, 2 = long). */
470 TRUE, /* pc_relative. */
472 complain_overflow_signed, /* complain_on_overflow. */
473 bfin_bfd_reloc, /* special_function. */
474 "R_BFIN_PCREL10", /* name. */
475 FALSE, /* partial_inplace. */
477 0x000003FF, /* dst_mask. */
478 TRUE), /* pcrel_offset. */
480 HOWTO (R_BFIN_PCREL12_JUMP, /* type. */
482 /* the offset is actually 13 bit
483 aligned on a word boundary so
484 only 12 bits have to be used.
485 Right shift the rightmost bit.. */
486 1, /* size (0 = byte, 1 = short, 2 = long). */
488 TRUE, /* pc_relative. */
490 complain_overflow_signed, /* complain_on_overflow. */
491 bfin_bfd_reloc, /* special_function. */
492 "R_BFIN_PCREL12_JUMP", /* name. */
493 FALSE, /* partial_inplace. */
495 0x0FFF, /* dst_mask. */
496 TRUE), /* pcrel_offset. */
498 HOWTO (R_BFIN_RIMM16, /* type. */
500 1, /* size (0 = byte, 1 = short, 2 = long). */
502 FALSE, /* pc_relative. */
504 complain_overflow_signed, /* complain_on_overflow. */
505 bfin_imm16_reloc, /* special_function. */
506 "R_BFIN_RIMM16", /* name. */
507 FALSE, /* partial_inplace. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE), /* pcrel_offset. */
512 HOWTO (R_BFIN_LUIMM16, /* type. */
514 1, /* size (0 = byte, 1 = short, 2 = long). */
516 FALSE, /* pc_relative. */
518 complain_overflow_dont, /* complain_on_overflow. */
519 bfin_imm16_reloc, /* special_function. */
520 "R_BFIN_LUIMM16", /* name. */
521 FALSE, /* partial_inplace. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE), /* pcrel_offset. */
526 HOWTO (R_BFIN_HUIMM16, /* type. */
527 16, /* rightshift. */
528 1, /* size (0 = byte, 1 = short, 2 = long). */
530 FALSE, /* pc_relative. */
532 complain_overflow_unsigned, /* complain_on_overflow. */
533 bfin_imm16_reloc, /* special_function. */
534 "R_BFIN_HUIMM16", /* name. */
535 FALSE, /* partial_inplace. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE), /* pcrel_offset. */
540 HOWTO (R_BFIN_PCREL12_JUMP_S, /* type. */
542 1, /* size (0 = byte, 1 = short, 2 = long). */
544 TRUE, /* pc_relative. */
546 complain_overflow_signed, /* complain_on_overflow. */
547 bfin_bfd_reloc, /* special_function. */
548 "R_BFIN_PCREL12_JUMP_S", /* name. */
549 FALSE, /* partial_inplace. */
551 0x00000FFF, /* dst_mask. */
552 TRUE), /* pcrel_offset. */
554 HOWTO (R_BFIN_PCREL24_JUMP_X, /* type. */
556 2, /* size (0 = byte, 1 = short, 2 = long). */
558 TRUE, /* pc_relative. */
560 complain_overflow_signed, /* complain_on_overflow. */
561 bfin_pcrel24_reloc, /* special_function. */
562 "R_BFIN_PCREL24_JUMP_X", /* name. */
563 FALSE, /* partial_inplace. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE), /* pcrel_offset. */
568 HOWTO (R_BFIN_PCREL24, /* type. */
570 2, /* size (0 = byte, 1 = short, 2 = long). */
572 TRUE, /* pc_relative. */
574 complain_overflow_signed, /* complain_on_overflow. */
575 bfin_pcrel24_reloc, /* special_function. */
576 "R_BFIN_PCREL24", /* name. */
577 FALSE, /* partial_inplace. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE), /* pcrel_offset. */
582 HOWTO (R_BFIN_UNUSEDB, /* type. */
584 3, /* size (0 = byte, 1 = short, 2 = long). */
586 FALSE, /* pc_relative. */
588 complain_overflow_dont, /* complain_on_overflow. */
589 bfd_elf_generic_reloc, /* special_function. */
590 "R_BFIN_UNUSEDB", /* name. */
591 FALSE, /* partial_inplace. */
594 FALSE), /* pcrel_offset. */
596 HOWTO (R_BFIN_UNUSEDC, /* type. */
598 3, /* size (0 = byte, 1 = short, 2 = long). */
600 FALSE, /* pc_relative. */
602 complain_overflow_dont, /* complain_on_overflow. */
603 bfd_elf_generic_reloc, /* special_function. */
604 "R_BFIN_UNUSEDC", /* name. */
605 FALSE, /* partial_inplace. */
608 FALSE), /* pcrel_offset. */
610 HOWTO (R_BFIN_PCREL24_JUMP_L, /* type. */
612 2, /* size (0 = byte, 1 = short, 2 = long). */
614 TRUE, /* pc_relative. */
616 complain_overflow_signed, /* complain_on_overflow. */
617 bfin_pcrel24_reloc, /* special_function. */
618 "R_BFIN_PCREL24_JUMP_L", /* name. */
619 FALSE, /* partial_inplace. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE), /* pcrel_offset. */
624 HOWTO (R_BFIN_PCREL24_CALL_X, /* type. */
626 2, /* size (0 = byte, 1 = short, 2 = long). */
628 TRUE, /* pc_relative. */
630 complain_overflow_signed, /* complain_on_overflow. */
631 bfin_pcrel24_reloc, /* special_function. */
632 "R_BFIN_PCREL24_CALL_X", /* name. */
633 FALSE, /* partial_inplace. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE), /* pcrel_offset. */
638 HOWTO (R_BFIN_VAR_EQ_SYMB, /* type. */
640 2, /* size (0 = byte, 1 = short, 2 = long). */
642 FALSE, /* pc_relative. */
644 complain_overflow_bitfield, /* complain_on_overflow. */
645 bfin_bfd_reloc, /* special_function. */
646 "R_BFIN_VAR_EQ_SYMB", /* name. */
647 FALSE, /* partial_inplace. */
650 FALSE), /* pcrel_offset. */
652 HOWTO (R_BFIN_BYTE_DATA, /* type. */
654 0, /* size (0 = byte, 1 = short, 2 = long). */
656 FALSE, /* pc_relative. */
658 complain_overflow_unsigned, /* complain_on_overflow. */
659 bfin_bfd_reloc, /* special_function. */
660 "R_BFIN_BYTE_DATA", /* name. */
661 FALSE, /* partial_inplace. */
663 0xFF, /* dst_mask. */
664 TRUE), /* pcrel_offset. */
666 HOWTO (R_BFIN_BYTE2_DATA, /* type. */
668 1, /* size (0 = byte, 1 = short, 2 = long). */
670 FALSE, /* pc_relative. */
672 complain_overflow_signed, /* complain_on_overflow. */
673 bfin_bfd_reloc, /* special_function. */
674 "R_BFIN_BYTE2_DATA", /* name. */
675 FALSE, /* partial_inplace. */
677 0xFFFF, /* dst_mask. */
678 TRUE), /* pcrel_offset. */
680 HOWTO (R_BFIN_BYTE4_DATA, /* type. */
682 2, /* size (0 = byte, 1 = short, 2 = long). */
684 FALSE, /* pc_relative. */
686 complain_overflow_unsigned, /* complain_on_overflow. */
687 bfin_byte4_reloc, /* special_function. */
688 "R_BFIN_BYTE4_DATA", /* name. */
689 FALSE, /* partial_inplace. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE), /* pcrel_offset. */
694 HOWTO (R_BFIN_PCREL11, /* type. */
696 1, /* size (0 = byte, 1 = short, 2 = long). */
698 TRUE, /* pc_relative. */
700 complain_overflow_unsigned, /* complain_on_overflow. */
701 bfin_bfd_reloc, /* special_function. */
702 "R_BFIN_PCREL11", /* name. */
703 FALSE, /* partial_inplace. */
705 0x000003FF, /* dst_mask. */
706 FALSE), /* pcrel_offset. */
709 /* A 18-bit signed operand with the GOT offset for the address of
711 HOWTO (R_BFIN_GOT17M4, /* type */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
715 FALSE, /* pc_relative */
717 complain_overflow_signed, /* complain_on_overflow */
718 bfd_elf_generic_reloc, /* special_function */
719 "R_BFIN_GOT17M4", /* name */
720 FALSE, /* partial_inplace */
721 0xffff, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
725 /* The upper 16 bits of the GOT offset for the address of the
727 HOWTO (R_BFIN_GOTHI, /* type */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
731 FALSE, /* pc_relative */
733 complain_overflow_dont, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_BFIN_GOTHI", /* name */
736 FALSE, /* partial_inplace */
737 0xffff, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
741 /* The lower 16 bits of the GOT offset for the address of the
743 HOWTO (R_BFIN_GOTLO, /* type */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
747 FALSE, /* pc_relative */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_BFIN_GOTLO", /* name */
752 FALSE, /* partial_inplace */
753 0xffff, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
757 /* The 32-bit address of the canonical descriptor of a function. */
758 HOWTO (R_BFIN_FUNCDESC, /* type */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
762 FALSE, /* pc_relative */
764 complain_overflow_bitfield, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_BFIN_FUNCDESC", /* name */
767 FALSE, /* partial_inplace */
768 0xffffffff, /* src_mask */
769 0xffffffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
772 /* A 12-bit signed operand with the GOT offset for the address of
773 canonical descriptor of a function. */
774 HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
778 FALSE, /* pc_relative */
780 complain_overflow_signed, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_BFIN_FUNCDESC_GOT17M4", /* name */
783 FALSE, /* partial_inplace */
784 0xffff, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE), /* pcrel_offset */
788 /* The upper 16 bits of the GOT offset for the address of the
789 canonical descriptor of a function. */
790 HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
794 FALSE, /* pc_relative */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_BFIN_FUNCDESC_GOTHI", /* name */
799 FALSE, /* partial_inplace */
800 0xffff, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
804 /* The lower 16 bits of the GOT offset for the address of the
805 canonical descriptor of a function. */
806 HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
810 FALSE, /* pc_relative */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_BFIN_FUNCDESC_GOTLO", /* name */
815 FALSE, /* partial_inplace */
816 0xffff, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
820 /* The 32-bit address of the canonical descriptor of a function. */
821 HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
825 FALSE, /* pc_relative */
827 complain_overflow_bitfield, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_BFIN_FUNCDESC_VALUE", /* name */
830 FALSE, /* partial_inplace */
831 0xffffffff, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
835 /* A 12-bit signed operand with the GOT offset for the address of
836 canonical descriptor of a function. */
837 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
841 FALSE, /* pc_relative */
843 complain_overflow_signed, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
846 FALSE, /* partial_inplace */
847 0xffff, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE), /* pcrel_offset */
851 /* The upper 16 bits of the GOT offset for the address of the
852 canonical descriptor of a function. */
853 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
857 FALSE, /* pc_relative */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
862 FALSE, /* partial_inplace */
863 0xffff, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE), /* pcrel_offset */
867 /* The lower 16 bits of the GOT offset for the address of the
868 canonical descriptor of a function. */
869 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
873 FALSE, /* pc_relative */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
878 FALSE, /* partial_inplace */
879 0xffff, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
883 /* A 12-bit signed operand with the GOT offset for the address of
885 HOWTO (R_BFIN_GOTOFF17M4, /* type */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
889 FALSE, /* pc_relative */
891 complain_overflow_signed, /* complain_on_overflow */
892 bfd_elf_generic_reloc, /* special_function */
893 "R_BFIN_GOTOFF17M4", /* name */
894 FALSE, /* partial_inplace */
895 0xffff, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
899 /* The upper 16 bits of the GOT offset for the address of the
901 HOWTO (R_BFIN_GOTOFFHI, /* type */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
905 FALSE, /* pc_relative */
907 complain_overflow_dont, /* complain_on_overflow */
908 bfd_elf_generic_reloc, /* special_function */
909 "R_BFIN_GOTOFFHI", /* name */
910 FALSE, /* partial_inplace */
911 0xffff, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
915 /* The lower 16 bits of the GOT offset for the address of the
917 HOWTO (R_BFIN_GOTOFFLO, /* type */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
921 FALSE, /* pc_relative */
923 complain_overflow_dont, /* complain_on_overflow */
924 bfd_elf_generic_reloc, /* special_function */
925 "R_BFIN_GOTOFFLO", /* name */
926 FALSE, /* partial_inplace */
927 0xffff, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
932 static reloc_howto_type bfin_gnuext_howto_table [] =
934 HOWTO (R_BFIN_PLTPC, /* type. */
936 1, /* size (0 = byte, 1 = short, 2 = long). */
938 FALSE, /* pc_relative. */
940 complain_overflow_bitfield, /* complain_on_overflow. */
941 bfin_pltpc_reloc, /* special_function. */
942 "R_BFIN_PLTPC", /* name. */
943 FALSE, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE), /* pcrel_offset. */
948 HOWTO (R_BFIN_GOT, /* type. */
950 1, /* size (0 = byte, 1 = short, 2 = long). */
952 FALSE, /* pc_relative. */
954 complain_overflow_bitfield, /* complain_on_overflow. */
955 bfd_elf_generic_reloc, /* special_function. */
956 "R_BFIN_GOT", /* name. */
957 FALSE, /* partial_inplace. */
958 0x7fff, /* src_mask. */
959 0x7fff, /* dst_mask. */
960 FALSE), /* pcrel_offset. */
962 /* GNU extension to record C++ vtable hierarchy. */
963 HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */
965 2, /* size (0 = byte, 1 = short, 2 = long). */
967 FALSE, /* pc_relative. */
969 complain_overflow_dont, /* complain_on_overflow. */
970 NULL, /* special_function. */
971 "R_BFIN_GNU_VTINHERIT", /* name. */
972 FALSE, /* partial_inplace. */
975 FALSE), /* pcrel_offset. */
977 /* GNU extension to record C++ vtable member usage. */
978 HOWTO (R_BFIN_GNU_VTENTRY, /* type. */
980 2, /* size (0 = byte, 1 = short, 2 = long). */
982 FALSE, /* pc_relative. */
984 complain_overflow_dont, /* complain_on_overflow. */
985 _bfd_elf_rel_vtable_reloc_fn, /* special_function. */
986 "R_BFIN_GNU_VTENTRY", /* name. */
987 FALSE, /* partial_inplace. */
990 FALSE) /* pcrel_offset. */
993 struct bfin_reloc_map
995 bfd_reloc_code_real_type bfd_reloc_val;
996 unsigned int bfin_reloc_val;
999 static const struct bfin_reloc_map bfin_reloc_map [] =
1001 { BFD_RELOC_NONE, R_BFIN_UNUSED0 },
1002 { BFD_RELOC_BFIN_5_PCREL, R_BFIN_PCREL5M2 },
1003 { BFD_RELOC_NONE, R_BFIN_UNUSED1 },
1004 { BFD_RELOC_BFIN_10_PCREL, R_BFIN_PCREL10 },
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP, R_BFIN_PCREL12_JUMP },
1006 { BFD_RELOC_BFIN_16_IMM, R_BFIN_RIMM16 },
1007 { BFD_RELOC_BFIN_16_LOW, R_BFIN_LUIMM16 },
1008 { BFD_RELOC_BFIN_16_HIGH, R_BFIN_HUIMM16 },
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_BFIN_PCREL12_JUMP_S },
1010 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1011 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_BFIN_PCREL24_JUMP_L },
1013 { BFD_RELOC_NONE, R_BFIN_UNUSEDB },
1014 { BFD_RELOC_NONE, R_BFIN_UNUSEDC },
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_BFIN_PCREL24_CALL_X },
1016 { BFD_RELOC_8, R_BFIN_BYTE_DATA },
1017 { BFD_RELOC_16, R_BFIN_BYTE2_DATA },
1018 { BFD_RELOC_32, R_BFIN_BYTE4_DATA },
1019 { BFD_RELOC_BFIN_11_PCREL, R_BFIN_PCREL11 },
1020 { BFD_RELOC_BFIN_GOT, R_BFIN_GOT },
1021 { BFD_RELOC_BFIN_PLTPC, R_BFIN_PLTPC },
1023 { BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 },
1024 { BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI },
1025 { BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO },
1026 { BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC },
1027 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 },
1028 { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI },
1029 { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO },
1030 { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE },
1031 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 },
1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI },
1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO },
1034 { BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 },
1035 { BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI },
1036 { BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO },
1038 { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT },
1039 { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY },
1044 bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1046 Elf_Internal_Rela *dst)
1048 unsigned int r_type;
1050 r_type = ELF32_R_TYPE (dst->r_info);
1052 if (r_type <= BFIN_RELOC_MAX)
1053 cache_ptr->howto = &bfin_howto_table [r_type];
1055 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1056 cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1059 cache_ptr->howto = (reloc_howto_type *) NULL;
1062 /* Given a BFD reloc type, return the howto. */
1063 static reloc_howto_type *
1064 bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1065 bfd_reloc_code_real_type code)
1068 unsigned int r_type = (unsigned int) -1;
1070 for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); i--;)
1071 if (bfin_reloc_map[i].bfd_reloc_val == code)
1072 r_type = bfin_reloc_map[i].bfin_reloc_val;
1074 if (r_type <= BFIN_RELOC_MAX)
1075 return &bfin_howto_table [r_type];
1077 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1078 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1080 return (reloc_howto_type *) NULL;
1083 static reloc_howto_type *
1084 bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1090 i < (sizeof (bfin_howto_table)
1091 / sizeof (bfin_howto_table[0]));
1093 if (bfin_howto_table[i].name != NULL
1094 && strcasecmp (bfin_howto_table[i].name, r_name) == 0)
1095 return &bfin_howto_table[i];
1098 i < (sizeof (bfin_gnuext_howto_table)
1099 / sizeof (bfin_gnuext_howto_table[0]));
1101 if (bfin_gnuext_howto_table[i].name != NULL
1102 && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0)
1103 return &bfin_gnuext_howto_table[i];
1108 /* Given a bfin relocation type, return the howto. */
1109 static reloc_howto_type *
1110 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1111 unsigned int r_type)
1113 if (r_type <= BFIN_RELOC_MAX)
1114 return &bfin_howto_table [r_type];
1116 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1117 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1119 return (reloc_howto_type *) NULL;
1122 /* Set by ld emulation if --code-in-l1. */
1123 bfd_boolean elf32_bfin_code_in_l1 = 0;
1125 /* Set by ld emulation if --data-in-l1. */
1126 bfd_boolean elf32_bfin_data_in_l1 = 0;
1129 elf32_bfin_final_write_processing (bfd *abfd,
1130 bfd_boolean linker ATTRIBUTE_UNUSED)
1132 if (elf32_bfin_code_in_l1)
1133 elf_elfheader (abfd)->e_flags |= EF_BFIN_CODE_IN_L1;
1134 if (elf32_bfin_data_in_l1)
1135 elf_elfheader (abfd)->e_flags |= EF_BFIN_DATA_IN_L1;
1138 /* Return TRUE if the name is a local label.
1139 bfin local labels begin with L$. */
1141 bfin_is_local_label_name (bfd *abfd, const char *label)
1143 if (label[0] == 'L' && label[1] == '$' )
1146 return _bfd_elf_is_local_label_name (abfd, label);
1149 /* Look through the relocs for a section during the first phase, and
1150 allocate space in the global offset table or procedure linkage
1154 bfin_check_relocs (bfd * abfd,
1155 struct bfd_link_info *info,
1157 const Elf_Internal_Rela *relocs)
1160 Elf_Internal_Shdr *symtab_hdr;
1161 struct elf_link_hash_entry **sym_hashes;
1162 bfd_signed_vma *local_got_refcounts;
1163 const Elf_Internal_Rela *rel;
1164 const Elf_Internal_Rela *rel_end;
1168 if (info->relocatable)
1171 dynobj = elf_hash_table (info)->dynobj;
1172 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1173 sym_hashes = elf_sym_hashes (abfd);
1174 local_got_refcounts = elf_local_got_refcounts (abfd);
1179 rel_end = relocs + sec->reloc_count;
1180 for (rel = relocs; rel < rel_end; rel++)
1182 unsigned long r_symndx;
1183 struct elf_link_hash_entry *h;
1185 r_symndx = ELF32_R_SYM (rel->r_info);
1186 if (r_symndx < symtab_hdr->sh_info)
1190 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1192 /* PR15323, ref flags aren't set for references in the same
1194 h->root.non_ir_ref = 1;
1197 switch (ELF32_R_TYPE (rel->r_info))
1199 /* This relocation describes the C++ object vtable hierarchy.
1200 Reconstruct it for later use during GC. */
1201 case R_BFIN_GNU_VTINHERIT:
1202 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1206 /* This relocation describes which C++ vtable entries
1207 are actually used. Record for later use during GC. */
1208 case R_BFIN_GNU_VTENTRY:
1209 BFD_ASSERT (h != NULL);
1211 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1217 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1223 /* Create the .got section. */
1224 elf_hash_table (info)->dynobj = dynobj = abfd;
1225 if (!_bfd_elf_create_got_section (dynobj, info))
1231 sgot = bfd_get_linker_section (dynobj, ".got");
1232 BFD_ASSERT (sgot != NULL);
1235 if (srelgot == NULL && (h != NULL || info->shared))
1237 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1238 if (srelgot == NULL)
1240 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1241 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1243 srelgot = bfd_make_section_anyway_with_flags (dynobj,
1247 || !bfd_set_section_alignment (dynobj, srelgot, 2))
1254 if (h->got.refcount == 0)
1256 /* Make sure this symbol is output as a dynamic symbol. */
1257 if (h->dynindx == -1 && !h->forced_local)
1259 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1263 /* Allocate space in the .got section. */
1265 /* Allocate relocation space. */
1266 srelgot->size += sizeof (Elf32_External_Rela);
1272 /* This is a global offset table entry for a local symbol. */
1273 if (local_got_refcounts == NULL)
1277 size = symtab_hdr->sh_info;
1278 size *= sizeof (bfd_signed_vma);
1279 local_got_refcounts = ((bfd_signed_vma *)
1280 bfd_zalloc (abfd, size));
1281 if (local_got_refcounts == NULL)
1283 elf_local_got_refcounts (abfd) = local_got_refcounts;
1285 if (local_got_refcounts[r_symndx] == 0)
1290 /* If we are generating a shared object, we need to
1291 output a R_68K_RELATIVE reloc so that the dynamic
1292 linker can adjust this GOT entry. */
1293 srelgot->size += sizeof (Elf32_External_Rela);
1296 local_got_refcounts[r_symndx]++;
1308 static enum elf_reloc_type_class
1309 elf32_bfin_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
1310 const asection *rel_sec ATTRIBUTE_UNUSED,
1311 const Elf_Internal_Rela * rela)
1313 switch ((int) ELF32_R_TYPE (rela->r_info))
1316 return reloc_class_normal;
1320 static bfd_reloc_status_type
1321 bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto,
1322 bfd *input_bfd, asection *input_section,
1323 bfd_byte *contents, bfd_vma address,
1324 bfd_vma value, bfd_vma addend)
1326 int r_type = ELF32_R_TYPE (rel->r_info);
1328 if (r_type == R_BFIN_PCREL24 || r_type == R_BFIN_PCREL24_JUMP_L)
1330 bfd_reloc_status_type r = bfd_reloc_ok;
1333 if (address > bfd_get_section_limit (input_bfd, input_section))
1334 return bfd_reloc_outofrange;
1338 /* Perform usual pc-relative correction. */
1339 value -= input_section->output_section->vma + input_section->output_offset;
1342 /* We are getting reloc_entry->address 2 byte off from
1343 the start of instruction. Assuming absolute postion
1344 of the reloc data. But, following code had been written assuming
1345 reloc address is starting at begining of instruction.
1346 To compensate that I have increased the value of
1347 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1352 if ((value & 0xFF000000) != 0
1353 && (value & 0xFF000000) != 0xFF000000)
1354 r = bfd_reloc_overflow;
1358 x = bfd_get_16 (input_bfd, contents + address);
1359 x = (x & 0xff00) | ((value >> 16) & 0xff);
1360 bfd_put_16 (input_bfd, x, contents + address);
1362 x = bfd_get_16 (input_bfd, contents + address + 2);
1364 bfd_put_16 (input_bfd, x, contents + address + 2);
1368 return _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1369 rel->r_offset, value, addend);
1374 bfin_relocate_section (bfd * output_bfd,
1375 struct bfd_link_info *info,
1377 asection * input_section,
1378 bfd_byte * contents,
1379 Elf_Internal_Rela * relocs,
1380 Elf_Internal_Sym * local_syms,
1381 asection ** local_sections)
1384 Elf_Internal_Shdr *symtab_hdr;
1385 struct elf_link_hash_entry **sym_hashes;
1386 bfd_vma *local_got_offsets;
1388 Elf_Internal_Rela *rel;
1389 Elf_Internal_Rela *relend;
1392 dynobj = elf_hash_table (info)->dynobj;
1393 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1394 sym_hashes = elf_sym_hashes (input_bfd);
1395 local_got_offsets = elf_local_got_offsets (input_bfd);
1400 relend = relocs + input_section->reloc_count;
1401 for (; rel < relend; rel++, i++)
1404 reloc_howto_type *howto;
1405 unsigned long r_symndx;
1406 struct elf_link_hash_entry *h;
1407 Elf_Internal_Sym *sym;
1409 bfd_vma relocation = 0;
1410 bfd_boolean unresolved_reloc;
1411 bfd_reloc_status_type r;
1414 r_type = ELF32_R_TYPE (rel->r_info);
1415 if (r_type < 0 || r_type >= 243)
1417 bfd_set_error (bfd_error_bad_value);
1421 if (r_type == R_BFIN_GNU_VTENTRY
1422 || r_type == R_BFIN_GNU_VTINHERIT)
1425 howto = bfin_reloc_type_lookup (input_bfd, r_type);
1428 bfd_set_error (bfd_error_bad_value);
1431 r_symndx = ELF32_R_SYM (rel->r_info);
1436 unresolved_reloc = FALSE;
1438 if (r_symndx < symtab_hdr->sh_info)
1440 sym = local_syms + r_symndx;
1441 sec = local_sections[r_symndx];
1442 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1446 bfd_boolean warned, ignored;
1448 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1449 r_symndx, symtab_hdr, sym_hashes,
1451 unresolved_reloc, warned, ignored);
1454 if (sec != NULL && discarded_section (sec))
1455 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1456 rel, 1, relend, howto, 0, contents);
1458 if (info->relocatable)
1461 address = rel->r_offset;
1463 /* Then, process normally. */
1466 case R_BFIN_GNU_VTINHERIT:
1467 case R_BFIN_GNU_VTENTRY:
1468 return bfd_reloc_ok;
1471 /* Relocation is to the address of the entry for this symbol
1472 in the global offset table. */
1474 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1477 /* Relocation is the offset of the entry for this symbol in
1478 the global offset table. */
1485 /* Create the .got section. */
1486 elf_hash_table (info)->dynobj = dynobj = output_bfd;
1487 if (!_bfd_elf_create_got_section (dynobj, info))
1493 sgot = bfd_get_linker_section (dynobj, ".got");
1494 BFD_ASSERT (sgot != NULL);
1501 off = h->got.offset;
1502 BFD_ASSERT (off != (bfd_vma) - 1);
1503 dyn = elf_hash_table (info)->dynamic_sections_created;
1505 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1512 /* This is actually a static link, or it is a
1513 -Bsymbolic link and the symbol is defined
1514 locally, or the symbol was forced to be local
1515 because of a version file.. We must initialize
1516 this entry in the global offset table. Since
1517 the offset must always be a multiple of 4, we
1518 use the least significant bit to record whether
1519 we have initialized it already.
1521 When doing a dynamic link, we create a .rela.got
1522 relocation entry to initialize the value. This
1523 is done in the finish_dynamic_symbol routine. */
1528 bfd_put_32 (output_bfd, relocation,
1529 sgot->contents + off);
1534 unresolved_reloc = FALSE;
1538 BFD_ASSERT (local_got_offsets != NULL);
1539 off = local_got_offsets[r_symndx];
1540 BFD_ASSERT (off != (bfd_vma) - 1);
1542 /* The offset must always be a multiple of 4. We use
1543 the least significant bit to record whether we have
1544 already generated the necessary reloc. */
1549 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1554 Elf_Internal_Rela outrel;
1557 s = bfd_get_linker_section (dynobj, ".rela.got");
1558 BFD_ASSERT (s != NULL);
1560 outrel.r_offset = (sgot->output_section->vma
1561 + sgot->output_offset + off);
1563 ELF32_R_INFO (0, R_BFIN_PCREL24);
1564 outrel.r_addend = relocation;
1567 s->reloc_count++ * sizeof (Elf32_External_Rela);
1568 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1571 local_got_offsets[r_symndx] |= 1;
1575 relocation = sgot->output_offset + off;
1577 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1584 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
1586 relocation, rel->r_addend);
1591 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1592 because such sections are not SEC_ALLOC and thus ld.so will
1593 not process them. */
1594 if (unresolved_reloc
1595 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)
1596 && _bfd_elf_section_offset (output_bfd, info, input_section,
1597 rel->r_offset) != (bfd_vma) -1)
1599 (*_bfd_error_handler)
1600 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
1602 input_section, (long) rel->r_offset, h->root.root.string);
1606 if (r != bfd_reloc_ok)
1611 name = h->root.root.string;
1614 name = bfd_elf_string_from_elf_section (input_bfd,
1615 symtab_hdr->sh_link,
1620 name = bfd_section_name (input_bfd, sec);
1623 if (r == bfd_reloc_overflow)
1625 if (!(info->callbacks->reloc_overflow
1626 (info, (h ? &h->root : NULL), name, howto->name,
1627 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1632 (*_bfd_error_handler)
1633 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
1634 input_bfd, input_section,
1635 (long) rel->r_offset, name, (int) r);
1645 bfin_gc_mark_hook (asection * sec,
1646 struct bfd_link_info *info,
1647 Elf_Internal_Rela * rel,
1648 struct elf_link_hash_entry *h,
1649 Elf_Internal_Sym * sym)
1652 switch (ELF32_R_TYPE (rel->r_info))
1654 case R_BFIN_GNU_VTINHERIT:
1655 case R_BFIN_GNU_VTENTRY:
1659 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1662 /* Update the got entry reference counts for the section being removed. */
1665 bfin_gc_sweep_hook (bfd * abfd,
1666 struct bfd_link_info *info,
1668 const Elf_Internal_Rela * relocs)
1670 Elf_Internal_Shdr *symtab_hdr;
1671 struct elf_link_hash_entry **sym_hashes;
1672 bfd_signed_vma *local_got_refcounts;
1673 const Elf_Internal_Rela *rel, *relend;
1678 dynobj = elf_hash_table (info)->dynobj;
1682 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1683 sym_hashes = elf_sym_hashes (abfd);
1684 local_got_refcounts = elf_local_got_refcounts (abfd);
1686 sgot = bfd_get_linker_section (dynobj, ".got");
1687 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1689 relend = relocs + sec->reloc_count;
1690 for (rel = relocs; rel < relend; rel++)
1692 unsigned long r_symndx;
1693 struct elf_link_hash_entry *h;
1695 switch (ELF32_R_TYPE (rel->r_info))
1698 r_symndx = ELF32_R_SYM (rel->r_info);
1699 if (r_symndx >= symtab_hdr->sh_info)
1701 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1702 if (h->got.refcount > 0)
1705 if (h->got.refcount == 0)
1707 /* We don't need the .got entry any more. */
1709 srelgot->size -= sizeof (Elf32_External_Rela);
1713 else if (local_got_refcounts != NULL)
1715 if (local_got_refcounts[r_symndx] > 0)
1717 --local_got_refcounts[r_symndx];
1718 if (local_got_refcounts[r_symndx] == 0)
1720 /* We don't need the .got entry any more. */
1723 srelgot->size -= sizeof (Elf32_External_Rela);
1735 extern const bfd_target bfin_elf32_fdpic_vec;
1736 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1738 /* An extension of the elf hash table data structure,
1739 containing some additional Blackfin-specific data. */
1740 struct bfinfdpic_elf_link_hash_table
1742 struct elf_link_hash_table elf;
1744 /* A pointer to the .got section. */
1746 /* A pointer to the .rel.got section. */
1748 /* A pointer to the .rofixup section. */
1749 asection *sgotfixup;
1750 /* A pointer to the .plt section. */
1752 /* A pointer to the .rel.plt section. */
1754 /* GOT base offset. */
1756 /* Location of the first non-lazy PLT entry, i.e., the number of
1757 bytes taken by lazy PLT entries. */
1759 /* A hash table holding information about which symbols were
1760 referenced with which PIC-related relocations. */
1761 struct htab *relocs_info;
1762 /* Summary reloc information collected by
1763 _bfinfdpic_count_got_plt_entries. */
1764 struct _bfinfdpic_dynamic_got_info *g;
1767 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1769 #define bfinfdpic_hash_table(info) \
1770 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1771 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1773 #define bfinfdpic_got_section(info) \
1774 (bfinfdpic_hash_table (info)->sgot)
1775 #define bfinfdpic_gotrel_section(info) \
1776 (bfinfdpic_hash_table (info)->sgotrel)
1777 #define bfinfdpic_gotfixup_section(info) \
1778 (bfinfdpic_hash_table (info)->sgotfixup)
1779 #define bfinfdpic_plt_section(info) \
1780 (bfinfdpic_hash_table (info)->splt)
1781 #define bfinfdpic_pltrel_section(info) \
1782 (bfinfdpic_hash_table (info)->spltrel)
1783 #define bfinfdpic_relocs_info(info) \
1784 (bfinfdpic_hash_table (info)->relocs_info)
1785 #define bfinfdpic_got_initial_offset(info) \
1786 (bfinfdpic_hash_table (info)->got0)
1787 #define bfinfdpic_plt_initial_offset(info) \
1788 (bfinfdpic_hash_table (info)->plt0)
1789 #define bfinfdpic_dynamic_got_plt_info(info) \
1790 (bfinfdpic_hash_table (info)->g)
1792 /* The name of the dynamic interpreter. This is put in the .interp
1795 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1797 #define DEFAULT_STACK_SIZE 0x20000
1799 /* This structure is used to collect the number of entries present in
1800 each addressable range of the got. */
1801 struct _bfinfdpic_dynamic_got_info
1803 /* Several bits of information about the current link. */
1804 struct bfd_link_info *info;
1805 /* Total size needed for GOT entries within the 18- or 32-bit
1807 bfd_vma got17m4, gothilo;
1808 /* Total size needed for function descriptor entries within the 18-
1809 or 32-bit ranges. */
1810 bfd_vma fd17m4, fdhilo;
1811 /* Total size needed function descriptor entries referenced in PLT
1812 entries, that would be profitable to place in offsets close to
1813 the PIC register. */
1815 /* Total size needed by lazy PLT entries. */
1817 /* Number of relocations carried over from input object files. */
1818 unsigned long relocs;
1819 /* Number of fixups introduced by relocations in input object files. */
1820 unsigned long fixups;
1823 /* Create a Blackfin ELF linker hash table. */
1825 static struct bfd_link_hash_table *
1826 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1828 struct bfinfdpic_elf_link_hash_table *ret;
1829 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1831 ret = bfd_zmalloc (amt);
1835 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1836 _bfd_elf_link_hash_newfunc,
1837 sizeof (struct elf_link_hash_entry),
1844 return &ret->elf.root;
1847 /* Decide whether a reference to a symbol can be resolved locally or
1848 not. If the symbol is protected, we want the local address, but
1849 its function descriptor must be assigned by the dynamic linker. */
1850 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1851 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1852 || ! elf_hash_table (INFO)->dynamic_sections_created)
1853 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1854 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1856 /* This structure collects information on what kind of GOT, PLT or
1857 function descriptors are required by relocations that reference a
1859 struct bfinfdpic_relocs_info
1861 /* The index of the symbol, as stored in the relocation r_info, if
1862 we have a local symbol; -1 otherwise. */
1866 /* The input bfd in which the symbol is defined, if it's a local
1869 /* If symndx == -1, the hash table entry corresponding to a global
1870 symbol (even if it turns out to bind locally, in which case it
1871 should ideally be replaced with section's symndx + addend). */
1872 struct elf_link_hash_entry *h;
1874 /* The addend of the relocation that references the symbol. */
1877 /* The fields above are used to identify an entry. The fields below
1878 contain information on how an entry is used and, later on, which
1879 locations it was assigned. */
1880 /* The following 2 fields record whether the symbol+addend above was
1881 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1882 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1885 /* Whether a FUNCDESC relocation references symbol+addend. */
1887 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1890 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1891 unsigned fdgoff17m4;
1892 unsigned fdgoffhilo;
1893 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1894 GOTOFFHI relocations. The addend doesn't really matter, since we
1895 envision that this will only be used to check whether the symbol
1896 is mapped to the same segment as the got. */
1898 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1900 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1903 /* Whether we need a PLT entry for a symbol. Should be implied by
1905 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1907 /* Whether a function descriptor should be created in this link unit
1908 for symbol+addend. Should be implied by something like:
1909 (plt || fdgotoff17m4 || fdgotofflohi
1910 || ((fd || fdgot17m4 || fdgothilo)
1911 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1913 /* Whether a lazy PLT entry is needed for this symbol+addend.
1914 Should be implied by something like:
1915 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1916 && ! (info->flags & DF_BIND_NOW)) */
1918 /* Whether we've already emitted GOT relocations and PLT entries as
1919 needed for this symbol. */
1922 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1923 relocations referencing the symbol. */
1924 unsigned relocs32, relocsfd, relocsfdv;
1926 /* The number of .rofixups entries and dynamic relocations allocated
1927 for this symbol, minus any that might have already been used. */
1928 unsigned fixups, dynrelocs;
1930 /* The offsets of the GOT entries assigned to symbol+addend, to the
1931 function descriptor's address, and to a function descriptor,
1932 respectively. Should be zero if unassigned. The offsets are
1933 counted from the value that will be assigned to the PIC register,
1934 not from the beginning of the .got section. */
1935 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1936 /* The offsets of the PLT entries assigned to symbol+addend,
1937 non-lazy and lazy, respectively. If unassigned, should be
1939 bfd_vma plt_entry, lzplt_entry;
1942 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1944 bfinfdpic_relocs_info_hash (const void *entry_)
1946 const struct bfinfdpic_relocs_info *entry = entry_;
1948 return (entry->symndx == -1
1949 ? (long) entry->d.h->root.root.hash
1950 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1953 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1956 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1958 const struct bfinfdpic_relocs_info *e1 = entry1;
1959 const struct bfinfdpic_relocs_info *e2 = entry2;
1961 return e1->symndx == e2->symndx && e1->addend == e2->addend
1962 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1965 /* Find or create an entry in a hash table HT that matches the key
1966 fields of the given ENTRY. If it's not found, memory for a new
1967 entry is allocated in ABFD's obstack. */
1968 static struct bfinfdpic_relocs_info *
1969 bfinfdpic_relocs_info_find (struct htab *ht,
1971 const struct bfinfdpic_relocs_info *entry,
1972 enum insert_option insert)
1974 struct bfinfdpic_relocs_info **loc;
1979 loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1987 *loc = bfd_zalloc (abfd, sizeof (**loc));
1992 (*loc)->symndx = entry->symndx;
1993 (*loc)->d = entry->d;
1994 (*loc)->addend = entry->addend;
1995 (*loc)->plt_entry = (bfd_vma)-1;
1996 (*loc)->lzplt_entry = (bfd_vma)-1;
2001 /* Obtain the address of the entry in HT associated with H's symbol +
2002 addend, creating a new entry if none existed. ABFD is only used
2003 for memory allocation purposes. */
2004 inline static struct bfinfdpic_relocs_info *
2005 bfinfdpic_relocs_info_for_global (struct htab *ht,
2007 struct elf_link_hash_entry *h,
2009 enum insert_option insert)
2011 struct bfinfdpic_relocs_info entry;
2015 entry.addend = addend;
2017 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2020 /* Obtain the address of the entry in HT associated with the SYMNDXth
2021 local symbol of the input bfd ABFD, plus the addend, creating a new
2022 entry if none existed. */
2023 inline static struct bfinfdpic_relocs_info *
2024 bfinfdpic_relocs_info_for_local (struct htab *ht,
2028 enum insert_option insert)
2030 struct bfinfdpic_relocs_info entry;
2032 entry.symndx = symndx;
2033 entry.d.abfd = abfd;
2034 entry.addend = addend;
2036 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2039 /* Merge fields set by check_relocs() of two entries that end up being
2040 mapped to the same (presumably global) symbol. */
2043 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
2044 struct bfinfdpic_relocs_info const *e1)
2046 e2->got17m4 |= e1->got17m4;
2047 e2->gothilo |= e1->gothilo;
2049 e2->fdgot17m4 |= e1->fdgot17m4;
2050 e2->fdgothilo |= e1->fdgothilo;
2051 e2->fdgoff17m4 |= e1->fdgoff17m4;
2052 e2->fdgoffhilo |= e1->fdgoffhilo;
2053 e2->gotoff |= e1->gotoff;
2054 e2->call |= e1->call;
2058 /* Every block of 65535 lazy PLT entries shares a single call to the
2059 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
2060 32767, counting from 0). All other lazy PLT entries branch to it
2061 in a single instruction. */
2063 #define LZPLT_RESOLVER_EXTRA 10
2064 #define LZPLT_NORMAL_SIZE 6
2065 #define LZPLT_ENTRIES 1362
2067 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
2068 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
2070 /* Add a dynamic relocation to the SRELOC section. */
2072 inline static bfd_vma
2073 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
2074 int reloc_type, long dynindx, bfd_vma addend,
2075 struct bfinfdpic_relocs_info *entry)
2077 Elf_Internal_Rela outrel;
2078 bfd_vma reloc_offset;
2080 outrel.r_offset = offset;
2081 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
2082 outrel.r_addend = addend;
2084 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
2085 BFD_ASSERT (reloc_offset < sreloc->size);
2086 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
2087 sreloc->contents + reloc_offset);
2088 sreloc->reloc_count++;
2090 /* If the entry's index is zero, this relocation was probably to a
2091 linkonce section that got discarded. We reserved a dynamic
2092 relocation, but it was for another entry than the one we got at
2093 the time of emitting the relocation. Unfortunately there's no
2094 simple way for us to catch this situation, since the relocation
2095 is cleared right before calling relocate_section, at which point
2096 we no longer know what the relocation used to point to. */
2099 BFD_ASSERT (entry->dynrelocs > 0);
2103 return reloc_offset;
2106 /* Add a fixup to the ROFIXUP section. */
2109 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2110 struct bfinfdpic_relocs_info *entry)
2112 bfd_vma fixup_offset;
2114 if (rofixup->flags & SEC_EXCLUDE)
2117 fixup_offset = rofixup->reloc_count * 4;
2118 if (rofixup->contents)
2120 BFD_ASSERT (fixup_offset < rofixup->size);
2121 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2123 rofixup->reloc_count++;
2125 if (entry && entry->symndx)
2127 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2129 BFD_ASSERT (entry->fixups > 0);
2133 return fixup_offset;
2136 /* Find the segment number in which OSEC, and output section, is
2140 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2142 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2144 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2147 inline static bfd_boolean
2148 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2150 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2152 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2155 /* Generate relocations for GOT entries, function descriptors, and
2156 code for PLT and lazy PLT entries. */
2158 inline static bfd_boolean
2159 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2161 struct bfd_link_info *info,
2163 Elf_Internal_Sym *sym,
2166 bfd_vma fd_lazy_rel_offset = (bfd_vma) -1;
2173 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2175 /* If the symbol is dynamic, consider it for dynamic
2176 relocations, otherwise decay to section + offset. */
2177 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2178 dynindx = entry->d.h->dynindx;
2182 && sec->output_section
2183 && ! bfd_is_abs_section (sec->output_section)
2184 && ! bfd_is_und_section (sec->output_section))
2185 dynindx = elf_section_data (sec->output_section)->dynindx;
2191 /* Generate relocation for GOT entry pointing to the symbol. */
2192 if (entry->got_entry)
2195 bfd_vma ad = addend;
2197 /* If the symbol is dynamic but binds locally, use
2199 if (sec && (entry->symndx != -1
2200 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2202 if (entry->symndx == -1)
2203 ad += entry->d.h->root.u.def.value;
2205 ad += sym->st_value;
2206 ad += sec->output_offset;
2207 if (sec->output_section && elf_section_data (sec->output_section))
2208 idx = elf_section_data (sec->output_section)->dynindx;
2213 /* If we're linking an executable at a fixed address, we can
2214 omit the dynamic relocation as long as the symbol is local to
2216 if (info->executable && !info->pie
2217 && (entry->symndx != -1
2218 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2221 ad += sec->output_section->vma;
2222 if (entry->symndx != -1
2223 || entry->d.h->root.type != bfd_link_hash_undefweak)
2224 _bfinfdpic_add_rofixup (output_bfd,
2225 bfinfdpic_gotfixup_section (info),
2226 bfinfdpic_got_section (info)->output_section
2228 + bfinfdpic_got_section (info)->output_offset
2229 + bfinfdpic_got_initial_offset (info)
2230 + entry->got_entry, entry);
2233 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2234 _bfd_elf_section_offset
2236 bfinfdpic_got_section (info),
2237 bfinfdpic_got_initial_offset (info)
2239 + bfinfdpic_got_section (info)
2240 ->output_section->vma
2241 + bfinfdpic_got_section (info)->output_offset,
2242 R_BFIN_BYTE4_DATA, idx, ad, entry);
2244 bfd_put_32 (output_bfd, ad,
2245 bfinfdpic_got_section (info)->contents
2246 + bfinfdpic_got_initial_offset (info)
2247 + entry->got_entry);
2250 /* Generate relocation for GOT entry pointing to a canonical
2251 function descriptor. */
2252 if (entry->fdgot_entry)
2257 if (! (entry->symndx == -1
2258 && entry->d.h->root.type == bfd_link_hash_undefweak
2259 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2261 /* If the symbol is dynamic and there may be dynamic symbol
2262 resolution because we are, or are linked with, a shared
2263 library, emit a FUNCDESC relocation such that the dynamic
2264 linker will allocate the function descriptor. If the
2265 symbol needs a non-local function descriptor but binds
2266 locally (e.g., its visibility is protected, emit a
2267 dynamic relocation decayed to section+offset. */
2268 if (entry->symndx == -1
2269 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2270 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2271 && !(info->executable && !info->pie))
2273 reloc = R_BFIN_FUNCDESC;
2274 idx = elf_section_data (entry->d.h->root.u.def.section
2275 ->output_section)->dynindx;
2276 ad = entry->d.h->root.u.def.section->output_offset
2277 + entry->d.h->root.u.def.value;
2279 else if (entry->symndx == -1
2280 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2282 reloc = R_BFIN_FUNCDESC;
2290 /* Otherwise, we know we have a private function descriptor,
2291 so reference it directly. */
2292 if (elf_hash_table (info)->dynamic_sections_created)
2293 BFD_ASSERT (entry->privfd);
2294 reloc = R_BFIN_BYTE4_DATA;
2295 idx = elf_section_data (bfinfdpic_got_section (info)
2296 ->output_section)->dynindx;
2297 ad = bfinfdpic_got_section (info)->output_offset
2298 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2301 /* If there is room for dynamic symbol resolution, emit the
2302 dynamic relocation. However, if we're linking an
2303 executable at a fixed location, we won't have emitted a
2304 dynamic symbol entry for the got section, so idx will be
2305 zero, which means we can and should compute the address
2306 of the private descriptor ourselves. */
2307 if (info->executable && !info->pie
2308 && (entry->symndx != -1
2309 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2311 ad += bfinfdpic_got_section (info)->output_section->vma;
2312 _bfinfdpic_add_rofixup (output_bfd,
2313 bfinfdpic_gotfixup_section (info),
2314 bfinfdpic_got_section (info)
2315 ->output_section->vma
2316 + bfinfdpic_got_section (info)
2318 + bfinfdpic_got_initial_offset (info)
2319 + entry->fdgot_entry, entry);
2322 _bfinfdpic_add_dyn_reloc (output_bfd,
2323 bfinfdpic_gotrel_section (info),
2324 _bfd_elf_section_offset
2326 bfinfdpic_got_section (info),
2327 bfinfdpic_got_initial_offset (info)
2328 + entry->fdgot_entry)
2329 + bfinfdpic_got_section (info)
2330 ->output_section->vma
2331 + bfinfdpic_got_section (info)
2333 reloc, idx, ad, entry);
2336 bfd_put_32 (output_bfd, ad,
2337 bfinfdpic_got_section (info)->contents
2338 + bfinfdpic_got_initial_offset (info)
2339 + entry->fdgot_entry);
2342 /* Generate relocation to fill in a private function descriptor in
2344 if (entry->fd_entry)
2347 bfd_vma ad = addend;
2349 long lowword, highword;
2351 /* If the symbol is dynamic but binds locally, use
2353 if (sec && (entry->symndx != -1
2354 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2356 if (entry->symndx == -1)
2357 ad += entry->d.h->root.u.def.value;
2359 ad += sym->st_value;
2360 ad += sec->output_offset;
2361 if (sec->output_section && elf_section_data (sec->output_section))
2362 idx = elf_section_data (sec->output_section)->dynindx;
2367 /* If we're linking an executable at a fixed address, we can
2368 omit the dynamic relocation as long as the symbol is local to
2370 if (info->executable && !info->pie
2371 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2374 ad += sec->output_section->vma;
2376 if (entry->symndx != -1
2377 || entry->d.h->root.type != bfd_link_hash_undefweak)
2379 _bfinfdpic_add_rofixup (output_bfd,
2380 bfinfdpic_gotfixup_section (info),
2381 bfinfdpic_got_section (info)
2382 ->output_section->vma
2383 + bfinfdpic_got_section (info)
2385 + bfinfdpic_got_initial_offset (info)
2386 + entry->fd_entry, entry);
2387 _bfinfdpic_add_rofixup (output_bfd,
2388 bfinfdpic_gotfixup_section (info),
2389 bfinfdpic_got_section (info)
2390 ->output_section->vma
2391 + bfinfdpic_got_section (info)
2393 + bfinfdpic_got_initial_offset (info)
2394 + entry->fd_entry + 4, entry);
2400 = _bfinfdpic_add_dyn_reloc (output_bfd,
2402 ? bfinfdpic_pltrel_section (info)
2403 : bfinfdpic_gotrel_section (info),
2404 _bfd_elf_section_offset
2406 bfinfdpic_got_section (info),
2407 bfinfdpic_got_initial_offset (info)
2409 + bfinfdpic_got_section (info)
2410 ->output_section->vma
2411 + bfinfdpic_got_section (info)
2413 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2416 /* If we've omitted the dynamic relocation, just emit the fixed
2417 addresses of the symbol and of the local GOT base offset. */
2418 if (info->executable && !info->pie && sec && sec->output_section)
2421 highword = bfinfdpic_got_section (info)->output_section->vma
2422 + bfinfdpic_got_section (info)->output_offset
2423 + bfinfdpic_got_initial_offset (info);
2425 else if (entry->lazyplt)
2430 fd_lazy_rel_offset = ofst;
2432 /* A function descriptor used for lazy or local resolving is
2433 initialized such that its high word contains the output
2434 section index in which the PLT entries are located, and
2435 the low word contains the address of the lazy PLT entry
2436 entry point, that must be within the memory region
2437 assigned to that section. */
2438 lowword = entry->lzplt_entry + 4
2439 + bfinfdpic_plt_section (info)->output_offset
2440 + bfinfdpic_plt_section (info)->output_section->vma;
2441 highword = _bfinfdpic_osec_to_segment
2442 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2446 /* A function descriptor for a local function gets the index
2447 of the section. For a non-local function, it's
2451 || (entry->symndx == -1 && entry->d.h->dynindx != -1
2452 && entry->d.h->dynindx == idx))
2455 highword = _bfinfdpic_osec_to_segment
2456 (output_bfd, sec->output_section);
2459 bfd_put_32 (output_bfd, lowword,
2460 bfinfdpic_got_section (info)->contents
2461 + bfinfdpic_got_initial_offset (info)
2463 bfd_put_32 (output_bfd, highword,
2464 bfinfdpic_got_section (info)->contents
2465 + bfinfdpic_got_initial_offset (info)
2466 + entry->fd_entry + 4);
2469 /* Generate code for the PLT entry. */
2470 if (entry->plt_entry != (bfd_vma) -1)
2472 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2475 BFD_ASSERT (entry->fd_entry);
2477 /* Figure out what kind of PLT entry we need, depending on the
2478 location of the function descriptor within the GOT. */
2479 if (entry->fd_entry >= -(1 << (18 - 1))
2480 && entry->fd_entry + 4 < (1 << (18 - 1)))
2482 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2483 bfd_put_32 (output_bfd,
2484 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2486 bfd_put_32 (output_bfd,
2487 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2493 /* P1.L = fd_entry; P1.H = fd_entry;
2497 bfd_put_32 (output_bfd,
2498 0xe109 | (entry->fd_entry << 16),
2500 bfd_put_32 (output_bfd,
2501 0xe149 | (entry->fd_entry & 0xFFFF0000),
2503 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2504 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2505 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2509 bfd_put_16 (output_bfd, 0x0051, plt_code);
2512 /* Generate code for the lazy PLT entry. */
2513 if (entry->lzplt_entry != (bfd_vma) -1)
2515 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2516 + entry->lzplt_entry;
2517 bfd_vma resolverStub_addr;
2519 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2522 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2523 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2524 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2525 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2527 if (entry->lzplt_entry == resolverStub_addr)
2529 /* This is a lazy PLT entry that includes a resolver call.
2533 bfd_put_32 (output_bfd,
2536 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2540 /* JUMP.S resolverStub */
2541 bfd_put_16 (output_bfd,
2543 | (((resolverStub_addr - entry->lzplt_entry)
2544 / 2) & (((bfd_vma)1 << 12) - 1)),
2552 /* Relocate an Blackfin ELF section.
2554 The RELOCATE_SECTION function is called by the new ELF backend linker
2555 to handle the relocations for a section.
2557 The relocs are always passed as Rela structures; if the section
2558 actually uses Rel structures, the r_addend field will always be
2561 This function is responsible for adjusting the section contents as
2562 necessary, and (if using Rela relocs and generating a relocatable
2563 output file) adjusting the reloc addend as necessary.
2565 This function does not have to worry about setting the reloc
2566 address or the reloc symbol index.
2568 LOCAL_SYMS is a pointer to the swapped in local symbols.
2570 LOCAL_SECTIONS is an array giving the section in the input file
2571 corresponding to the st_shndx field of each local symbol.
2573 The global hash table entry for the global symbols can be found
2574 via elf_sym_hashes (input_bfd).
2576 When generating relocatable output, this function must handle
2577 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2578 going to be the section symbol corresponding to the output
2579 section, which means that the addend must be adjusted
2583 bfinfdpic_relocate_section (bfd * output_bfd,
2584 struct bfd_link_info *info,
2586 asection * input_section,
2587 bfd_byte * contents,
2588 Elf_Internal_Rela * relocs,
2589 Elf_Internal_Sym * local_syms,
2590 asection ** local_sections)
2592 Elf_Internal_Shdr *symtab_hdr;
2593 struct elf_link_hash_entry **sym_hashes;
2594 Elf_Internal_Rela *rel;
2595 Elf_Internal_Rela *relend;
2596 unsigned isec_segment, got_segment, plt_segment,
2598 int silence_segment_error = !(info->shared || info->pie);
2600 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2601 sym_hashes = elf_sym_hashes (input_bfd);
2602 relend = relocs + input_section->reloc_count;
2604 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2605 input_section->output_section);
2606 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2607 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2608 bfinfdpic_got_section (info)
2612 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2613 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2614 bfinfdpic_plt_section (info)
2619 for (rel = relocs; rel < relend; rel ++)
2621 reloc_howto_type *howto;
2622 unsigned long r_symndx;
2623 Elf_Internal_Sym *sym;
2625 struct elf_link_hash_entry *h;
2627 bfd_reloc_status_type r;
2628 const char * name = NULL;
2631 struct bfinfdpic_relocs_info *picrel;
2632 bfd_vma orig_addend = rel->r_addend;
2634 r_type = ELF32_R_TYPE (rel->r_info);
2636 if (r_type == R_BFIN_GNU_VTINHERIT
2637 || r_type == R_BFIN_GNU_VTENTRY)
2640 r_symndx = ELF32_R_SYM (rel->r_info);
2641 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2644 bfd_set_error (bfd_error_bad_value);
2652 if (r_symndx < symtab_hdr->sh_info)
2654 sym = local_syms + r_symndx;
2655 osec = sec = local_sections [r_symndx];
2656 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2658 name = bfd_elf_string_from_elf_section
2659 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2660 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2664 bfd_boolean warned, ignored;
2665 bfd_boolean unresolved_reloc;
2667 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2668 r_symndx, symtab_hdr, sym_hashes,
2670 unresolved_reloc, warned, ignored);
2674 if (sec != NULL && discarded_section (sec))
2675 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2676 rel, 1, relend, howto, 0, contents);
2678 if (info->relocatable)
2682 && (h->root.type == bfd_link_hash_defined
2683 || h->root.type == bfd_link_hash_defweak)
2684 && !BFINFDPIC_SYM_LOCAL (info, h))
2692 case R_BFIN_PCREL24:
2693 case R_BFIN_PCREL24_JUMP_L:
2694 case R_BFIN_BYTE4_DATA:
2695 if (! IS_FDPIC (output_bfd))
2698 case R_BFIN_GOT17M4:
2701 case R_BFIN_FUNCDESC_GOT17M4:
2702 case R_BFIN_FUNCDESC_GOTHI:
2703 case R_BFIN_FUNCDESC_GOTLO:
2704 case R_BFIN_GOTOFF17M4:
2705 case R_BFIN_GOTOFFHI:
2706 case R_BFIN_GOTOFFLO:
2707 case R_BFIN_FUNCDESC_GOTOFF17M4:
2708 case R_BFIN_FUNCDESC_GOTOFFHI:
2709 case R_BFIN_FUNCDESC_GOTOFFLO:
2710 case R_BFIN_FUNCDESC:
2711 case R_BFIN_FUNCDESC_VALUE:
2713 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2714 (info), input_bfd, h,
2715 orig_addend, INSERT);
2717 /* In order to find the entry we created before, we must
2718 use the original addend, not the one that may have been
2719 modified by _bfd_elf_rela_local_sym(). */
2720 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2721 (info), input_bfd, r_symndx,
2722 orig_addend, INSERT);
2726 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2730 (*_bfd_error_handler)
2731 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2732 input_bfd, input_section, rel->r_offset, name);
2742 if (h && ! BFINFDPIC_SYM_LOCAL (info, h)
2743 && _bfd_elf_section_offset (output_bfd, info, input_section,
2744 rel->r_offset) != (bfd_vma) -1)
2746 info->callbacks->warning
2747 (info, _("relocation references symbol not defined in the module"),
2748 name, input_bfd, input_section, rel->r_offset);
2756 case R_BFIN_PCREL24:
2757 case R_BFIN_PCREL24_JUMP_L:
2758 check_segment[0] = isec_segment;
2759 if (! IS_FDPIC (output_bfd))
2760 check_segment[1] = isec_segment;
2761 else if (picrel->plt)
2763 relocation = bfinfdpic_plt_section (info)->output_section->vma
2764 + bfinfdpic_plt_section (info)->output_offset
2765 + picrel->plt_entry;
2766 check_segment[1] = plt_segment;
2768 /* We don't want to warn on calls to undefined weak symbols,
2769 as calls to them must be protected by non-NULL tests
2770 anyway, and unprotected calls would invoke undefined
2772 else if (picrel->symndx == -1
2773 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2774 check_segment[1] = check_segment[0];
2776 check_segment[1] = sec
2777 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2781 case R_BFIN_GOT17M4:
2784 relocation = picrel->got_entry;
2785 check_segment[0] = check_segment[1] = got_segment;
2788 case R_BFIN_FUNCDESC_GOT17M4:
2789 case R_BFIN_FUNCDESC_GOTHI:
2790 case R_BFIN_FUNCDESC_GOTLO:
2791 relocation = picrel->fdgot_entry;
2792 check_segment[0] = check_segment[1] = got_segment;
2795 case R_BFIN_GOTOFFHI:
2796 case R_BFIN_GOTOFF17M4:
2797 case R_BFIN_GOTOFFLO:
2798 relocation -= bfinfdpic_got_section (info)->output_section->vma
2799 + bfinfdpic_got_section (info)->output_offset
2800 + bfinfdpic_got_initial_offset (info);
2801 check_segment[0] = got_segment;
2802 check_segment[1] = sec
2803 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2807 case R_BFIN_FUNCDESC_GOTOFF17M4:
2808 case R_BFIN_FUNCDESC_GOTOFFHI:
2809 case R_BFIN_FUNCDESC_GOTOFFLO:
2810 relocation = picrel->fd_entry;
2811 check_segment[0] = check_segment[1] = got_segment;
2814 case R_BFIN_FUNCDESC:
2817 bfd_vma addend = rel->r_addend;
2819 if (! (h && h->root.type == bfd_link_hash_undefweak
2820 && BFINFDPIC_SYM_LOCAL (info, h)))
2822 /* If the symbol is dynamic and there may be dynamic
2823 symbol resolution because we are or are linked with a
2824 shared library, emit a FUNCDESC relocation such that
2825 the dynamic linker will allocate the function
2826 descriptor. If the symbol needs a non-local function
2827 descriptor but binds locally (e.g., its visibility is
2828 protected, emit a dynamic relocation decayed to
2830 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2831 && BFINFDPIC_SYM_LOCAL (info, h)
2832 && !(info->executable && !info->pie))
2834 dynindx = elf_section_data (h->root.u.def.section
2835 ->output_section)->dynindx;
2836 addend += h->root.u.def.section->output_offset
2837 + h->root.u.def.value;
2839 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2843 info->callbacks->warning
2844 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2845 name, input_bfd, input_section, rel->r_offset);
2848 dynindx = h->dynindx;
2852 /* Otherwise, we know we have a private function
2853 descriptor, so reference it directly. */
2854 BFD_ASSERT (picrel->privfd);
2855 r_type = R_BFIN_BYTE4_DATA;
2856 dynindx = elf_section_data (bfinfdpic_got_section (info)
2857 ->output_section)->dynindx;
2858 addend = bfinfdpic_got_section (info)->output_offset
2859 + bfinfdpic_got_initial_offset (info)
2863 /* If there is room for dynamic symbol resolution, emit
2864 the dynamic relocation. However, if we're linking an
2865 executable at a fixed location, we won't have emitted a
2866 dynamic symbol entry for the got section, so idx will
2867 be zero, which means we can and should compute the
2868 address of the private descriptor ourselves. */
2869 if (info->executable && !info->pie
2870 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2874 addend += bfinfdpic_got_section (info)->output_section->vma;
2875 if ((bfd_get_section_flags (output_bfd,
2876 input_section->output_section)
2877 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2879 if (_bfinfdpic_osec_readonly_p (output_bfd,
2883 info->callbacks->warning
2885 _("cannot emit fixups in read-only section"),
2886 name, input_bfd, input_section, rel->r_offset);
2890 offset = _bfd_elf_section_offset
2892 input_section, rel->r_offset);
2894 if (offset != (bfd_vma)-1)
2895 _bfinfdpic_add_rofixup (output_bfd,
2896 bfinfdpic_gotfixup_section
2898 offset + input_section
2899 ->output_section->vma
2900 + input_section->output_offset,
2904 else if ((bfd_get_section_flags (output_bfd,
2905 input_section->output_section)
2906 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2910 if (_bfinfdpic_osec_readonly_p (output_bfd,
2914 info->callbacks->warning
2916 _("cannot emit dynamic relocations in read-only section"),
2917 name, input_bfd, input_section, rel->r_offset);
2920 offset = _bfd_elf_section_offset (output_bfd, info,
2921 input_section, rel->r_offset);
2923 if (offset != (bfd_vma)-1)
2924 _bfinfdpic_add_dyn_reloc (output_bfd,
2925 bfinfdpic_gotrel_section (info),
2926 offset + input_section
2927 ->output_section->vma
2928 + input_section->output_offset,
2930 dynindx, addend, picrel);
2933 addend += bfinfdpic_got_section (info)->output_section->vma;
2936 /* We want the addend in-place because dynamic
2937 relocations are REL. Setting relocation to it should
2938 arrange for it to be installed. */
2939 relocation = addend - rel->r_addend;
2941 check_segment[0] = check_segment[1] = got_segment;
2944 case R_BFIN_BYTE4_DATA:
2945 if (! IS_FDPIC (output_bfd))
2947 check_segment[0] = check_segment[1] = -1;
2951 case R_BFIN_FUNCDESC_VALUE:
2954 bfd_vma addend = rel->r_addend;
2956 offset = _bfd_elf_section_offset (output_bfd, info,
2957 input_section, rel->r_offset);
2959 /* If the symbol is dynamic but binds locally, use
2961 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2963 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2965 info->callbacks->warning
2966 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2967 name, input_bfd, input_section, rel->r_offset);
2970 dynindx = h->dynindx;
2975 addend += h->root.u.def.value;
2977 addend += sym->st_value;
2979 addend += osec->output_offset;
2980 if (osec && osec->output_section
2981 && ! bfd_is_abs_section (osec->output_section)
2982 && ! bfd_is_und_section (osec->output_section))
2983 dynindx = elf_section_data (osec->output_section)->dynindx;
2988 /* If we're linking an executable at a fixed address, we
2989 can omit the dynamic relocation as long as the symbol
2990 is defined in the current link unit (which is implied
2991 by its output section not being NULL). */
2992 if (info->executable && !info->pie
2993 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2996 addend += osec->output_section->vma;
2997 if (IS_FDPIC (input_bfd)
2998 && (bfd_get_section_flags (output_bfd,
2999 input_section->output_section)
3000 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3002 if (_bfinfdpic_osec_readonly_p (output_bfd,
3006 info->callbacks->warning
3008 _("cannot emit fixups in read-only section"),
3009 name, input_bfd, input_section, rel->r_offset);
3012 if (!h || h->root.type != bfd_link_hash_undefweak)
3014 if (offset != (bfd_vma)-1)
3016 _bfinfdpic_add_rofixup (output_bfd,
3017 bfinfdpic_gotfixup_section
3019 offset + input_section
3020 ->output_section->vma
3021 + input_section->output_offset,
3024 if (r_type == R_BFIN_FUNCDESC_VALUE)
3025 _bfinfdpic_add_rofixup
3027 bfinfdpic_gotfixup_section (info),
3028 offset + input_section->output_section->vma
3029 + input_section->output_offset + 4, picrel);
3036 if ((bfd_get_section_flags (output_bfd,
3037 input_section->output_section)
3038 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3040 if (_bfinfdpic_osec_readonly_p (output_bfd,
3044 info->callbacks->warning
3046 _("cannot emit dynamic relocations in read-only section"),
3047 name, input_bfd, input_section, rel->r_offset);
3051 if (offset != (bfd_vma)-1)
3052 _bfinfdpic_add_dyn_reloc (output_bfd,
3053 bfinfdpic_gotrel_section (info),
3055 + input_section->output_section->vma
3056 + input_section->output_offset,
3057 r_type, dynindx, addend, picrel);
3060 addend += osec->output_section->vma;
3061 /* We want the addend in-place because dynamic
3062 relocations are REL. Setting relocation to it
3063 should arrange for it to be installed. */
3064 relocation = addend - rel->r_addend;
3067 if (r_type == R_BFIN_FUNCDESC_VALUE)
3069 /* If we've omitted the dynamic relocation, just emit
3070 the fixed addresses of the symbol and of the local
3072 if (info->executable && !info->pie
3073 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3074 bfd_put_32 (output_bfd,
3075 bfinfdpic_got_section (info)->output_section->vma
3076 + bfinfdpic_got_section (info)->output_offset
3077 + bfinfdpic_got_initial_offset (info),
3078 contents + rel->r_offset + 4);
3080 /* A function descriptor used for lazy or local
3081 resolving is initialized such that its high word
3082 contains the output section index in which the
3083 PLT entries are located, and the low word
3084 contains the offset of the lazy PLT entry entry
3085 point into that section. */
3086 bfd_put_32 (output_bfd,
3087 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3089 : _bfinfdpic_osec_to_segment (output_bfd,
3092 contents + rel->r_offset + 4);
3095 check_segment[0] = check_segment[1] = got_segment;
3099 check_segment[0] = isec_segment;
3100 check_segment[1] = sec
3101 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3106 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3108 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3109 in the ld testsuite. */
3110 /* This helps catch problems in GCC while we can't do more
3111 than static linking. The idea is to test whether the
3112 input file basename is crt0.o only once. */
3113 if (silence_segment_error == 1)
3114 silence_segment_error =
3115 (strlen (input_bfd->filename) == 6
3116 && filename_cmp (input_bfd->filename, "crt0.o") == 0)
3117 || (strlen (input_bfd->filename) > 6
3118 && filename_cmp (input_bfd->filename
3119 + strlen (input_bfd->filename) - 7,
3123 if (!silence_segment_error
3124 /* We don't want duplicate errors for undefined
3126 && !(picrel && picrel->symndx == -1
3127 && picrel->d.h->root.type == bfd_link_hash_undefined))
3128 info->callbacks->warning
3130 (info->shared || info->pie)
3131 ? _("relocations between different segments are not supported")
3132 : _("warning: relocation references a different segment"),
3133 name, input_bfd, input_section, rel->r_offset);
3134 if (!silence_segment_error && (info->shared || info->pie))
3136 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3141 case R_BFIN_GOTOFFHI:
3142 /* We need the addend to be applied before we shift the
3144 relocation += rel->r_addend;
3147 case R_BFIN_FUNCDESC_GOTHI:
3148 case R_BFIN_FUNCDESC_GOTOFFHI:
3153 case R_BFIN_FUNCDESC_GOTLO:
3154 case R_BFIN_GOTOFFLO:
3155 case R_BFIN_FUNCDESC_GOTOFFLO:
3156 relocation &= 0xffff;
3165 case R_BFIN_PCREL24:
3166 case R_BFIN_PCREL24_JUMP_L:
3167 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3171 /* When referencing a GOT entry, a function descriptor or a
3172 PLT, we don't want the addend to apply to the reference,
3173 but rather to the referenced symbol. The actual entry
3174 will have already been created taking the addend into
3175 account, so cancel it out here. */
3176 case R_BFIN_GOT17M4:
3179 case R_BFIN_FUNCDESC_GOT17M4:
3180 case R_BFIN_FUNCDESC_GOTHI:
3181 case R_BFIN_FUNCDESC_GOTLO:
3182 case R_BFIN_FUNCDESC_GOTOFF17M4:
3183 case R_BFIN_FUNCDESC_GOTOFFHI:
3184 case R_BFIN_FUNCDESC_GOTOFFLO:
3185 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3186 here, since we do want to apply the addend to the others.
3187 Note that we've applied the addend to GOTOFFHI before we
3188 shifted it right. */
3189 case R_BFIN_GOTOFFHI:
3190 relocation -= rel->r_addend;
3197 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3198 contents, rel->r_offset,
3199 relocation, rel->r_addend);
3201 if (r != bfd_reloc_ok)
3203 const char * msg = (const char *) NULL;
3207 case bfd_reloc_overflow:
3208 r = info->callbacks->reloc_overflow
3209 (info, (h ? &h->root : NULL), name, howto->name,
3210 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3213 case bfd_reloc_undefined:
3214 r = info->callbacks->undefined_symbol
3215 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3218 case bfd_reloc_outofrange:
3219 msg = _("internal error: out of range error");
3222 case bfd_reloc_notsupported:
3223 msg = _("internal error: unsupported relocation error");
3226 case bfd_reloc_dangerous:
3227 msg = _("internal error: dangerous relocation");
3231 msg = _("internal error: unknown error");
3236 r = info->callbacks->warning
3237 (info, msg, name, input_bfd, input_section, rel->r_offset);
3247 /* Update the relocation information for the relocations of the section
3251 bfinfdpic_gc_sweep_hook (bfd *abfd,
3252 struct bfd_link_info *info,
3254 const Elf_Internal_Rela *relocs)
3256 Elf_Internal_Shdr *symtab_hdr;
3257 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3258 const Elf_Internal_Rela *rel;
3259 const Elf_Internal_Rela *rel_end;
3260 struct bfinfdpic_relocs_info *picrel;
3262 BFD_ASSERT (IS_FDPIC (abfd));
3264 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3265 sym_hashes = elf_sym_hashes (abfd);
3266 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3267 if (!elf_bad_symtab (abfd))
3268 sym_hashes_end -= symtab_hdr->sh_info;
3270 rel_end = relocs + sec->reloc_count;
3271 for (rel = relocs; rel < rel_end; rel++)
3273 struct elf_link_hash_entry *h;
3274 unsigned long r_symndx;
3276 r_symndx = ELF32_R_SYM (rel->r_info);
3277 if (r_symndx < symtab_hdr->sh_info)
3280 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3283 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3285 rel->r_addend, NO_INSERT);
3287 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3288 (info), abfd, r_symndx,
3289 rel->r_addend, NO_INSERT);
3294 switch (ELF32_R_TYPE (rel->r_info))
3296 case R_BFIN_PCREL24:
3297 case R_BFIN_PCREL24_JUMP_L:
3301 case R_BFIN_FUNCDESC_VALUE:
3302 picrel->relocsfdv--;
3303 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3307 case R_BFIN_BYTE4_DATA:
3309 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3313 case R_BFIN_GOT17M4:
3322 case R_BFIN_FUNCDESC_GOT17M4:
3323 picrel->fdgot17m4--;
3326 case R_BFIN_FUNCDESC_GOTHI:
3327 case R_BFIN_FUNCDESC_GOTLO:
3328 picrel->fdgothilo--;
3331 case R_BFIN_GOTOFF17M4:
3332 case R_BFIN_GOTOFFHI:
3333 case R_BFIN_GOTOFFLO:
3337 case R_BFIN_FUNCDESC_GOTOFF17M4:
3338 picrel->fdgoff17m4--;
3341 case R_BFIN_FUNCDESC_GOTOFFHI:
3342 case R_BFIN_FUNCDESC_GOTOFFLO:
3343 picrel->fdgoffhilo--;
3346 case R_BFIN_FUNCDESC:
3359 /* We need dynamic symbols for every section, since segments can
3360 relocate independently. */
3362 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3363 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3366 switch (elf_section_data (p)->this_hdr.sh_type)
3370 /* If sh_type is yet undecided, assume it could be
3371 SHT_PROGBITS/SHT_NOBITS. */
3375 /* There shouldn't be section relative relocations
3376 against any other section. */
3382 /* Create a .got section, as well as its additional info field. This
3383 is almost entirely copied from
3384 elflink.c:_bfd_elf_create_got_section(). */
3387 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3389 flagword flags, pltflags;
3391 struct elf_link_hash_entry *h;
3392 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3395 /* This function may be called more than once. */
3396 s = bfd_get_linker_section (abfd, ".got");
3400 /* Machine specific: although pointers are 32-bits wide, we want the
3401 GOT to be aligned to a 64-bit boundary, such that function
3402 descriptors in it can be accessed with 64-bit loads and
3406 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3407 | SEC_LINKER_CREATED);
3410 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3412 || !bfd_set_section_alignment (abfd, s, ptralign))
3415 if (bed->want_got_plt)
3417 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
3419 || !bfd_set_section_alignment (abfd, s, ptralign))
3423 if (bed->want_got_sym)
3425 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3426 (or .got.plt) section. We don't do this in the linker script
3427 because we don't want to define the symbol if we are not creating
3428 a global offset table. */
3429 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3430 elf_hash_table (info)->hgot = h;
3434 /* Machine-specific: we want the symbol for executables as
3436 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3440 /* The first bit of the global offset table is the header. */
3441 s->size += bed->got_header_size;
3443 /* This is the machine-specific part. Create and initialize section
3444 data for the got. */
3445 if (IS_FDPIC (abfd))
3447 bfinfdpic_got_section (info) = s;
3448 bfinfdpic_relocs_info (info) = htab_try_create (1,
3449 bfinfdpic_relocs_info_hash,
3450 bfinfdpic_relocs_info_eq,
3452 if (! bfinfdpic_relocs_info (info))
3455 s = bfd_make_section_anyway_with_flags (abfd, ".rel.got",
3456 (flags | SEC_READONLY));
3458 || ! bfd_set_section_alignment (abfd, s, 2))
3461 bfinfdpic_gotrel_section (info) = s;
3463 /* Machine-specific. */
3464 s = bfd_make_section_anyway_with_flags (abfd, ".rofixup",
3465 (flags | SEC_READONLY));
3467 || ! bfd_set_section_alignment (abfd, s, 2))
3470 bfinfdpic_gotfixup_section (info) = s;
3473 pltflags |= SEC_CODE;
3474 if (bed->plt_not_loaded)
3475 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3476 if (bed->plt_readonly)
3477 pltflags |= SEC_READONLY;
3479 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
3481 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3483 /* Blackfin-specific: remember it. */
3484 bfinfdpic_plt_section (info) = s;
3486 if (bed->want_plt_sym)
3488 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3490 struct bfd_link_hash_entry *bh = NULL;
3492 if (! (_bfd_generic_link_add_one_symbol
3493 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3494 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3496 h = (struct elf_link_hash_entry *) bh;
3498 h->type = STT_OBJECT;
3500 if (! info->executable
3501 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3505 /* Blackfin-specific: we want rel relocations for the plt. */
3506 s = bfd_make_section_anyway_with_flags (abfd, ".rel.plt",
3507 flags | SEC_READONLY);
3509 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3511 /* Blackfin-specific: remember it. */
3512 bfinfdpic_pltrel_section (info) = s;
3517 /* Make sure the got and plt sections exist, and that our pointers in
3518 the link hash table point to them. */
3521 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3523 /* This is mostly copied from
3524 elflink.c:_bfd_elf_create_dynamic_sections(). */
3527 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3529 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3530 | SEC_LINKER_CREATED);
3532 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3533 .rel[a].bss sections. */
3535 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3536 if (! _bfin_create_got_section (abfd, info))
3539 /* Blackfin-specific: make sure we created everything we wanted. */
3540 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3541 /* && bfinfdpic_gotfixup_section (info) */
3542 && bfinfdpic_plt_section (info)
3543 && bfinfdpic_pltrel_section (info));
3545 if (bed->want_dynbss)
3547 /* The .dynbss section is a place to put symbols which are defined
3548 by dynamic objects, are referenced by regular objects, and are
3549 not functions. We must allocate space for them in the process
3550 image and use a R_*_COPY reloc to tell the dynamic linker to
3551 initialize them at run time. The linker script puts the .dynbss
3552 section into the .bss section of the final image. */
3553 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
3554 SEC_ALLOC | SEC_LINKER_CREATED);
3558 /* The .rel[a].bss section holds copy relocs. This section is not
3559 normally needed. We need to create it here, though, so that the
3560 linker will map it to an output section. We can't just create it
3561 only if we need it, because we will not know whether we need it
3562 until we have seen all the input files, and the first time the
3563 main linker code calls BFD after examining all the input files
3564 (size_dynamic_sections) the input sections have already been
3565 mapped to the output sections. If the section turns out not to
3566 be needed, we can discard it later. We will never need this
3567 section when generating a shared object, since they do not use
3571 s = bfd_make_section_anyway_with_flags (abfd,
3573 flags | SEC_READONLY);
3575 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3583 /* Compute the total GOT size required by each symbol in each range.
3584 Symbols may require up to 4 words in the GOT: an entry pointing to
3585 the symbol, an entry pointing to its function descriptor, and a
3586 private function descriptors taking two words. */
3589 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3590 struct _bfinfdpic_dynamic_got_info *dinfo)
3592 /* Allocate space for a GOT entry pointing to the symbol. */
3594 dinfo->got17m4 += 4;
3595 else if (entry->gothilo)
3596 dinfo->gothilo += 4;
3601 /* Allocate space for a GOT entry pointing to the function
3603 if (entry->fdgot17m4)
3604 dinfo->got17m4 += 4;
3605 else if (entry->fdgothilo)
3606 dinfo->gothilo += 4;
3611 /* Decide whether we need a PLT entry, a function descriptor in the
3612 GOT, and a lazy PLT entry for this symbol. */
3613 entry->plt = entry->call
3614 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3615 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3616 entry->privfd = entry->plt
3617 || entry->fdgoff17m4 || entry->fdgoffhilo
3618 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3619 && (entry->symndx != -1
3620 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3621 entry->lazyplt = entry->privfd
3622 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3623 && ! (dinfo->info->flags & DF_BIND_NOW)
3624 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3626 /* Allocate space for a function descriptor. */
3627 if (entry->fdgoff17m4)
3629 else if (entry->privfd && entry->plt)
3631 else if (entry->privfd)
3638 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3641 /* Compute the number of dynamic relocations and fixups that a symbol
3642 requires, and add (or subtract) from the grand and per-symbol
3646 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3647 struct _bfinfdpic_dynamic_got_info *dinfo,
3648 bfd_boolean subtract)
3650 bfd_vma relocs = 0, fixups = 0;
3652 if (!dinfo->info->executable || dinfo->info->pie)
3653 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3656 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3658 if (entry->symndx != -1
3659 || entry->d.h->root.type != bfd_link_hash_undefweak)
3660 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3663 relocs += entry->relocs32 + entry->relocsfdv;
3665 if (entry->symndx != -1
3666 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3668 if (entry->symndx != -1
3669 || entry->d.h->root.type != bfd_link_hash_undefweak)
3670 fixups += entry->relocsfd;
3673 relocs += entry->relocsfd;
3682 entry->dynrelocs += relocs;
3683 entry->fixups += fixups;
3684 dinfo->relocs += relocs;
3685 dinfo->fixups += fixups;
3688 /* Compute the total GOT and PLT size required by each symbol in each range. *
3689 Symbols may require up to 4 words in the GOT: an entry pointing to
3690 the symbol, an entry pointing to its function descriptor, and a
3691 private function descriptors taking two words. */
3694 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3696 struct bfinfdpic_relocs_info *entry = *entryp;
3697 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3699 _bfinfdpic_count_nontls_entries (entry, dinfo);
3701 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3706 /* This structure is used to assign offsets to got entries, function
3707 descriptors, plt entries and lazy plt entries. */
3709 struct _bfinfdpic_dynamic_got_plt_info
3711 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3712 struct _bfinfdpic_dynamic_got_info g;
3714 /* For each addressable range, we record a MAX (positive) and MIN
3715 (negative) value. CUR is used to assign got entries, and it's
3716 incremented from an initial positive value to MAX, then from MIN
3717 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3718 assign function descriptors, and it's decreased from an initial
3719 non-positive value to MIN, then from MAX down to CUR (unless CUR
3720 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3721 to even words. ODD, if non-zero, indicates an odd word to be
3722 used for the next got entry, otherwise CUR is used and
3723 incremented by a pair of words, wrapping around when it reaches
3724 MAX. FDCUR is decremented (and wrapped) before the next function
3725 descriptor is chosen. FDPLT indicates the number of remaining
3726 slots that can be used for function descriptors used only by PLT
3728 struct _bfinfdpic_dynamic_got_alloc_data
3730 bfd_signed_vma max, cur, odd, fdcur, min;
3735 /* Determine the positive and negative ranges to be used by each
3736 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3737 double-word boundary, are the minimum (negative) and maximum
3738 (positive) GOT offsets already used by previous ranges, except for
3739 an ODD entry that may have been left behind. GOT and FD indicate
3740 the size of GOT entries and function descriptors that must be
3741 placed within the range from -WRAP to WRAP. If there's room left,
3742 up to FDPLT bytes should be reserved for additional function
3745 inline static bfd_signed_vma
3746 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3747 bfd_signed_vma fdcur,
3755 bfd_signed_vma wrapmin = -wrap;
3757 /* Start at the given initial points. */
3761 /* If we had an incoming odd word and we have any got entries that
3762 are going to use it, consume it, otherwise leave gad->odd at
3763 zero. We might force gad->odd to zero and return the incoming
3764 odd such that it is used by the next range, but then GOT entries
3765 might appear to be out of order and we wouldn't be able to
3766 shorten the GOT by one word if it turns out to end with an
3767 unpaired GOT entry. */
3777 /* If we're left with an unpaired GOT entry, compute its location
3778 such that we can return it. Otherwise, if got doesn't require an
3779 odd number of words here, either odd was already zero in the
3780 block above, or it was set to zero because got was non-zero, or
3781 got was already zero. In the latter case, we want the value of
3782 odd to carry over to the return statement, so we don't want to
3783 reset odd unless the condition below is true. */
3790 /* Compute the tentative boundaries of this range. */
3791 gad->max = cur + got;
3792 gad->min = fdcur - fd;
3795 /* If function descriptors took too much space, wrap some of them
3797 if (gad->min < wrapmin)
3799 gad->max += wrapmin - gad->min;
3802 /* If there is space left and we have function descriptors
3803 referenced in PLT entries that could take advantage of shorter
3804 offsets, place them here. */
3805 else if (fdplt && gad->min > wrapmin)
3808 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3809 fds = gad->min - wrapmin;
3818 /* If GOT entries took too much space, wrap some of them around.
3819 This may well cause gad->min to become lower than wrapmin. This
3820 will cause a relocation overflow later on, so we don't have to
3822 if ((bfd_vma) gad->max > wrap)
3824 gad->min -= gad->max - wrap;
3827 /* If there is more space left, try to place some more function
3828 descriptors for PLT entries. */
3829 else if (fdplt && (bfd_vma) gad->max < wrap)
3832 if ((bfd_vma) (wrap - gad->max) < fdplt)
3833 fds = wrap - gad->max;
3842 /* If odd was initially computed as an offset past the wrap point,
3845 odd = gad->min + odd - gad->max;
3847 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3848 before returning, so do it here too. This guarantees that,
3849 should cur and fdcur meet at the wrap point, they'll both be
3851 if (gad->cur == gad->max)
3852 gad->cur = gad->min;
3857 /* Compute the location of the next GOT entry, given the allocation
3858 data for a range. */
3860 inline static bfd_signed_vma
3861 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3867 /* If there was an odd word left behind, use it. */
3873 /* Otherwise, use the word pointed to by cur, reserve the next
3874 as an odd word, and skip to the next pair of words, possibly
3877 gad->odd = gad->cur + 4;
3879 if (gad->cur == gad->max)
3880 gad->cur = gad->min;
3886 /* Compute the location of the next function descriptor entry in the
3887 GOT, given the allocation data for a range. */
3889 inline static bfd_signed_vma
3890 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3892 /* If we're at the bottom, wrap around, and only then allocate the
3893 next pair of words. */
3894 if (gad->fdcur == gad->min)
3895 gad->fdcur = gad->max;
3896 return gad->fdcur -= 8;
3899 /* Assign GOT offsets for every GOT entry and function descriptor.
3900 Doing everything in a single pass is tricky. */
3903 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3905 struct bfinfdpic_relocs_info *entry = *entryp;
3906 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3909 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3910 else if (entry->gothilo)
3911 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3913 if (entry->fdgot17m4)
3914 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3915 else if (entry->fdgothilo)
3916 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3918 if (entry->fdgoff17m4)
3919 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3920 else if (entry->plt && dinfo->got17m4.fdplt)
3922 dinfo->got17m4.fdplt -= 8;
3923 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3925 else if (entry->plt)
3927 dinfo->gothilo.fdplt -= 8;
3928 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3930 else if (entry->privfd)
3931 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3936 /* Assign GOT offsets to private function descriptors used by PLT
3937 entries (or referenced by 32-bit offsets), as well as PLT entries
3938 and lazy PLT entries. */
3941 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3943 struct bfinfdpic_relocs_info *entry = *entryp;
3944 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3946 /* If this symbol requires a local function descriptor, allocate
3948 if (entry->privfd && entry->fd_entry == 0)
3950 if (dinfo->got17m4.fdplt)
3952 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3953 dinfo->got17m4.fdplt -= 8;
3957 BFD_ASSERT (dinfo->gothilo.fdplt);
3958 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3959 dinfo->gothilo.fdplt -= 8;
3967 /* We use the section's raw size to mark the location of the
3969 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3971 /* Figure out the length of this PLT entry based on the
3972 addressing mode we need to reach the function descriptor. */
3973 BFD_ASSERT (entry->fd_entry);
3974 if (entry->fd_entry >= -(1 << (18 - 1))
3975 && entry->fd_entry + 4 < (1 << (18 - 1)))
3980 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3985 entry->lzplt_entry = dinfo->g.lzplt;
3986 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3987 /* If this entry is the one that gets the resolver stub, account
3988 for the additional instruction. */
3989 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3990 == BFINFDPIC_LZPLT_RESOLV_LOC)
3991 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3997 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3998 _bfinfdpic_assign_plt_entries. */
4001 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
4003 struct bfinfdpic_relocs_info *entry = *entryp;
4005 entry->got_entry = 0;
4006 entry->fdgot_entry = 0;
4007 entry->fd_entry = 0;
4008 entry->plt_entry = (bfd_vma)-1;
4009 entry->lzplt_entry = (bfd_vma)-1;
4014 /* Follow indirect and warning hash entries so that each got entry
4015 points to the final symbol definition. P must point to a pointer
4016 to the hash table we're traversing. Since this traversal may
4017 modify the hash table, we set this pointer to NULL to indicate
4018 we've made a potentially-destructive change to the hash table, so
4019 the traversal must be restarted. */
4021 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
4023 struct bfinfdpic_relocs_info *entry = *entryp;
4026 if (entry->symndx == -1)
4028 struct elf_link_hash_entry *h = entry->d.h;
4029 struct bfinfdpic_relocs_info *oentry;
4031 while (h->root.type == bfd_link_hash_indirect
4032 || h->root.type == bfd_link_hash_warning)
4033 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4035 if (entry->d.h == h)
4038 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
4043 /* Merge the two entries. */
4044 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
4045 htab_clear_slot (*htab, entryp);
4051 /* If we can't find this entry with the new bfd hash, re-insert
4052 it, and get the traversal restarted. */
4053 if (! htab_find (*htab, entry))
4055 htab_clear_slot (*htab, entryp);
4056 entryp = htab_find_slot (*htab, entry, INSERT);
4059 /* Abort the traversal, since the whole table may have
4060 moved, and leave it up to the parent to restart the
4062 *(htab_t *)p = NULL;
4070 /* Compute the total size of the GOT, the PLT, the dynamic relocations
4071 section and the rofixup section. Assign locations for GOT and PLT
4075 _bfinfdpic_size_got_plt (bfd *output_bfd,
4076 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
4080 struct bfd_link_info *info = gpinfop->g.info;
4081 bfd *dynobj = elf_hash_table (info)->dynobj;
4083 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
4084 sizeof (gpinfop->g));
4087 /* Compute the total size taken by entries in the 18-bit range,
4088 to tell how many PLT function descriptors we can bring into it
4089 without causing it to overflow. */
4090 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
4091 if (limit < (bfd_vma)1 << 18)
4092 limit = ((bfd_vma)1 << 18) - limit;
4095 if (gpinfop->g.fdplt < limit)
4096 limit = gpinfop->g.fdplt;
4098 /* Determine the ranges of GOT offsets that we can use for each
4099 range of addressing modes. */
4100 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
4107 (bfd_vma)1 << (18-1));
4108 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
4109 gpinfop->got17m4.min,
4111 gpinfop->got17m4.max,
4114 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
4115 (bfd_vma)1 << (32-1));
4117 /* Now assign (most) GOT offsets. */
4118 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4121 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
4122 - gpinfop->gothilo.min
4123 /* If an odd word is the last word of the GOT, we don't need this
4124 word to be part of the GOT. */
4125 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
4126 if (bfinfdpic_got_section (info)->size == 0)
4127 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4128 else if (bfinfdpic_got_section (info)->size == 12
4129 && ! elf_hash_table (info)->dynamic_sections_created)
4131 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4132 bfinfdpic_got_section (info)->size = 0;
4136 bfinfdpic_got_section (info)->contents =
4137 (bfd_byte *) bfd_zalloc (dynobj,
4138 bfinfdpic_got_section (info)->size);
4139 if (bfinfdpic_got_section (info)->contents == NULL)
4143 if (elf_hash_table (info)->dynamic_sections_created)
4144 /* Subtract the number of lzplt entries, since those will generate
4145 relocations in the pltrel section. */
4146 bfinfdpic_gotrel_section (info)->size =
4147 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
4148 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4150 BFD_ASSERT (gpinfop->g.relocs == 0);
4151 if (bfinfdpic_gotrel_section (info)->size == 0)
4152 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4155 bfinfdpic_gotrel_section (info)->contents =
4156 (bfd_byte *) bfd_zalloc (dynobj,
4157 bfinfdpic_gotrel_section (info)->size);
4158 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4162 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
4163 if (bfinfdpic_gotfixup_section (info)->size == 0)
4164 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4167 bfinfdpic_gotfixup_section (info)->contents =
4168 (bfd_byte *) bfd_zalloc (dynobj,
4169 bfinfdpic_gotfixup_section (info)->size);
4170 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4174 if (elf_hash_table (info)->dynamic_sections_created)
4175 bfinfdpic_pltrel_section (info)->size =
4176 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4177 if (bfinfdpic_pltrel_section (info)->size == 0)
4178 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4181 bfinfdpic_pltrel_section (info)->contents =
4182 (bfd_byte *) bfd_zalloc (dynobj,
4183 bfinfdpic_pltrel_section (info)->size);
4184 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4188 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4189 such that there's room for the additional instruction needed to
4190 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4191 account for them, our block size is 4 bytes smaller than the real
4193 if (elf_hash_table (info)->dynamic_sections_created)
4195 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
4196 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4197 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4200 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4201 actually assign lazy PLT entries addresses. */
4202 gpinfop->g.lzplt = 0;
4204 /* Save information that we're going to need to generate GOT and PLT
4206 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
4208 if (get_elf_backend_data (output_bfd)->want_got_sym)
4209 elf_hash_table (info)->hgot->root.u.def.value
4210 = bfinfdpic_got_initial_offset (info);
4212 if (elf_hash_table (info)->dynamic_sections_created)
4213 bfinfdpic_plt_initial_offset (info) =
4214 bfinfdpic_plt_section (info)->size;
4216 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4219 /* Allocate the PLT section contents only after
4220 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4221 non-lazy PLT entries. */
4222 if (bfinfdpic_plt_section (info)->size == 0)
4223 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4226 bfinfdpic_plt_section (info)->contents =
4227 (bfd_byte *) bfd_zalloc (dynobj,
4228 bfinfdpic_plt_section (info)->size);
4229 if (bfinfdpic_plt_section (info)->contents == NULL)
4236 /* Set the sizes of the dynamic sections. */
4239 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4240 struct bfd_link_info *info)
4242 struct elf_link_hash_table *htab;
4245 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4247 htab = elf_hash_table (info);
4248 dynobj = htab->dynobj;
4249 BFD_ASSERT (dynobj != NULL);
4251 if (htab->dynamic_sections_created)
4253 /* Set the contents of the .interp section to the interpreter. */
4254 if (info->executable)
4256 s = bfd_get_linker_section (dynobj, ".interp");
4257 BFD_ASSERT (s != NULL);
4258 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4259 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4263 memset (&gpinfo, 0, sizeof (gpinfo));
4264 gpinfo.g.info = info;
4268 htab_t relocs = bfinfdpic_relocs_info (info);
4270 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4272 if (relocs == bfinfdpic_relocs_info (info))
4276 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4279 /* Allocate space to save the summary information, we're going to
4280 use it if we're doing relaxations. */
4281 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4283 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4286 if (elf_hash_table (info)->dynamic_sections_created)
4288 if (bfinfdpic_got_section (info)->size)
4289 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4292 if (bfinfdpic_pltrel_section (info)->size)
4293 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4294 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4295 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4298 if (bfinfdpic_gotrel_section (info)->size)
4299 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4300 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4301 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4302 sizeof (Elf32_External_Rel)))
4306 s = bfd_get_linker_section (dynobj, ".dynbss");
4307 if (s && s->size == 0)
4308 s->flags |= SEC_EXCLUDE;
4310 s = bfd_get_linker_section (dynobj, ".rela.bss");
4311 if (s && s->size == 0)
4312 s->flags |= SEC_EXCLUDE;
4318 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4319 struct bfd_link_info *info)
4321 if (!info->relocatable
4322 && !bfd_elf_stack_segment_size (output_bfd, info,
4323 "__stacksize", DEFAULT_STACK_SIZE))
4329 /* Check whether any of the relocations was optimized away, and
4330 subtract it from the relocation or fixup count. */
4332 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4333 struct bfd_link_info *info,
4334 bfd_boolean *changed)
4336 Elf_Internal_Shdr *symtab_hdr;
4337 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4338 Elf_Internal_Rela *rel, *erel;
4340 if ((sec->flags & SEC_RELOC) == 0
4341 || sec->reloc_count == 0)
4344 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4345 sym_hashes = elf_sym_hashes (abfd);
4346 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4347 if (!elf_bad_symtab (abfd))
4348 sym_hashes_end -= symtab_hdr->sh_info;
4350 rel = elf_section_data (sec)->relocs;
4352 /* Now examine each relocation. */
4353 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4355 struct elf_link_hash_entry *h;
4356 unsigned long r_symndx;
4357 struct bfinfdpic_relocs_info *picrel;
4358 struct _bfinfdpic_dynamic_got_info *dinfo;
4360 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4361 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4364 if (_bfd_elf_section_offset (sec->output_section->owner,
4365 info, sec, rel->r_offset)
4369 r_symndx = ELF32_R_SYM (rel->r_info);
4370 if (r_symndx < symtab_hdr->sh_info)
4374 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4375 while (h->root.type == bfd_link_hash_indirect
4376 || h->root.type == bfd_link_hash_warning)
4377 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4381 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4383 rel->r_addend, NO_INSERT);
4385 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4387 rel->r_addend, NO_INSERT);
4393 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4395 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4396 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4398 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4400 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4407 bfinfdpic_elf_discard_info (bfd *ibfd,
4408 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4409 struct bfd_link_info *info)
4411 bfd_boolean changed = FALSE;
4415 /* Account for relaxation of .eh_frame section. */
4416 for (s = ibfd->sections; s; s = s->next)
4417 if (s->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4419 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4421 obfd = s->output_section->owner;
4426 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4428 memset (&gpinfo, 0, sizeof (gpinfo));
4429 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4432 /* Clear GOT and PLT assignments. */
4433 htab_traverse (bfinfdpic_relocs_info (info),
4434 _bfinfdpic_reset_got_plt_entries,
4437 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4445 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4446 struct bfd_link_info *info)
4451 dynobj = elf_hash_table (info)->dynobj;
4453 if (bfinfdpic_got_section (info))
4455 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4456 == (bfinfdpic_gotrel_section (info)->reloc_count
4457 * sizeof (Elf32_External_Rel)));
4459 if (bfinfdpic_gotfixup_section (info))
4461 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4462 bfd_vma got_value = hgot->root.u.def.value
4463 + hgot->root.u.def.section->output_section->vma
4464 + hgot->root.u.def.section->output_offset;
4466 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4469 if (bfinfdpic_gotfixup_section (info)->size
4470 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4472 (*_bfd_error_handler)
4473 ("LINKER BUG: .rofixup section size mismatch");
4478 if (elf_hash_table (info)->dynamic_sections_created)
4480 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4481 == (bfinfdpic_pltrel_section (info)->reloc_count
4482 * sizeof (Elf32_External_Rel)));
4485 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4487 if (elf_hash_table (info)->dynamic_sections_created)
4489 Elf32_External_Dyn * dyncon;
4490 Elf32_External_Dyn * dynconend;
4492 BFD_ASSERT (sdyn != NULL);
4494 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4495 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4497 for (; dyncon < dynconend; dyncon++)
4499 Elf_Internal_Dyn dyn;
4501 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4509 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4510 + bfinfdpic_got_section (info)->output_offset
4511 + bfinfdpic_got_initial_offset (info);
4512 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4516 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4517 ->output_section->vma
4518 + bfinfdpic_pltrel_section (info)->output_offset;
4519 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4523 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4524 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4533 /* Adjust a symbol defined by a dynamic object and referenced by a
4537 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info *info,
4538 struct elf_link_hash_entry *h)
4542 dynobj = elf_hash_table (info)->dynobj;
4544 /* Make sure we know what is going on here. */
4545 BFD_ASSERT (dynobj != NULL
4546 && (h->u.weakdef != NULL
4549 && !h->def_regular)));
4551 /* If this is a weak symbol, and there is a real definition, the
4552 processor independent code will have arranged for us to see the
4553 real definition first, and we can just use the same value. */
4554 if (h->u.weakdef != NULL)
4556 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4557 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4558 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4559 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4565 /* Perform any actions needed for dynamic symbols. */
4568 elf32_bfinfdpic_finish_dynamic_symbol
4569 (bfd *output_bfd ATTRIBUTE_UNUSED,
4570 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4571 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4572 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4577 /* Decide whether to attempt to turn absptr or lsda encodings in
4578 shared libraries into pcrel within the given input section. */
4581 bfinfdpic_elf_use_relative_eh_frame
4582 (bfd *input_bfd ATTRIBUTE_UNUSED,
4583 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4584 asection *eh_frame_section ATTRIBUTE_UNUSED)
4586 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4590 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4593 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4594 struct bfd_link_info *info,
4595 asection *osec, bfd_vma offset,
4596 asection *loc_sec, bfd_vma loc_offset,
4599 struct elf_link_hash_entry *h;
4601 h = elf_hash_table (info)->hgot;
4602 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4604 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4605 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4606 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4607 loc_sec, loc_offset, encoded);
4609 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4610 == (_bfinfdpic_osec_to_segment
4611 (abfd, h->root.u.def.section->output_section)));
4613 *encoded = osec->vma + offset
4614 - (h->root.u.def.value
4615 + h->root.u.def.section->output_section->vma
4616 + h->root.u.def.section->output_offset);
4618 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4623 /* Look through the relocs for a section during the first phase.
4625 Besides handling virtual table relocs for gc, we have to deal with
4626 all sorts of PIC-related relocations. We describe below the
4627 general plan on how to handle such relocations, even though we only
4628 collect information at this point, storing them in hash tables for
4629 perusal of later passes.
4631 32 relocations are propagated to the linker output when creating
4632 position-independent output. LO16 and HI16 relocations are not
4633 supposed to be encountered in this case.
4635 LABEL16 should always be resolvable by the linker, since it's only
4638 LABEL24, on the other hand, is used by calls. If it turns out that
4639 the target of a call is a dynamic symbol, a PLT entry must be
4640 created for it, which triggers the creation of a private function
4641 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4643 GPREL relocations require the referenced symbol to be in the same
4644 segment as _gp, but this can only be checked later.
4646 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4647 exist. LABEL24 might as well, since it may require a PLT entry,
4648 that will require a got.
4650 Non-FUNCDESC GOT relocations require a GOT entry to be created
4651 regardless of whether the symbol is dynamic. However, since a
4652 global symbol that turns out to not be exported may have the same
4653 address of a non-dynamic symbol, we don't assign GOT entries at
4654 this point, such that we can share them in this case. A relocation
4655 for the GOT entry always has to be created, be it to offset a
4656 private symbol by the section load address, be it to get the symbol
4657 resolved dynamically.
4659 FUNCDESC GOT relocations require a GOT entry to be created, and
4660 handled as if a FUNCDESC relocation was applied to the GOT entry in
4663 FUNCDESC relocations referencing a symbol that turns out to NOT be
4664 dynamic cause a private function descriptor to be created. The
4665 FUNCDESC relocation then decays to a 32 relocation that points at
4666 the private descriptor. If the symbol is dynamic, the FUNCDESC
4667 relocation is propagated to the linker output, such that the
4668 dynamic linker creates the canonical descriptor, pointing to the
4669 dynamically-resolved definition of the function.
4671 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4672 symbols that are assigned to the same segment as the GOT, but we
4673 can only check this later, after we know the complete set of
4674 symbols defined and/or exported.
4676 FUNCDESC GOTOFF relocations require a function descriptor to be
4677 created and, unless lazy binding is disabled or the symbol is not
4678 dynamic, a lazy PLT entry. Since we can't tell at this point
4679 whether a symbol is going to be dynamic, we have to decide later
4680 whether to create a lazy PLT entry or bind the descriptor directly
4681 to the private function.
4683 FUNCDESC_VALUE relocations are not supposed to be present in object
4684 files, but they may very well be simply propagated to the linker
4685 output, since they have no side effect.
4688 A function descriptor always requires a FUNCDESC_VALUE relocation.
4689 Whether it's in .plt.rel or not depends on whether lazy binding is
4690 enabled and on whether the referenced symbol is dynamic.
4692 The existence of a lazy PLT requires the resolverStub lazy PLT
4693 entry to be present.
4696 As for assignment of GOT, PLT and lazy PLT entries, and private
4697 descriptors, we might do them all sequentially, but we can do
4698 better than that. For example, we can place GOT entries and
4699 private function descriptors referenced using 12-bit operands
4700 closer to the PIC register value, such that these relocations don't
4701 overflow. Those that are only referenced with LO16 relocations
4702 could come next, but we may as well place PLT-required function
4703 descriptors in the 12-bit range to make them shorter. Symbols
4704 referenced with LO16/HI16 may come next, but we may place
4705 additional function descriptors in the 16-bit range if we can
4706 reliably tell that we've already placed entries that are ever
4707 referenced with only LO16. PLT entries are therefore generated as
4708 small as possible, while not introducing relocation overflows in
4709 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4710 generated before or after PLT entries, but not intermingled with
4711 them, such that we can have more lazy PLT entries in range for a
4712 branch to the resolverStub. The resolverStub should be emitted at
4713 the most distant location from the first lazy PLT entry such that
4714 it's still in range for a branch, or closer, if there isn't a need
4715 for so many lazy PLT entries. Additional lazy PLT entries may be
4716 emitted after the resolverStub, as long as branches are still in
4717 range. If the branch goes out of range, longer lazy PLT entries
4720 We could further optimize PLT and lazy PLT entries by giving them
4721 priority in assignment to closer-to-gr17 locations depending on the
4722 number of occurrences of references to them (assuming a function
4723 that's called more often is more important for performance, so its
4724 PLT entry should be faster), or taking hints from the compiler.
4725 Given infinite time and money... :-) */
4728 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4729 asection *sec, const Elf_Internal_Rela *relocs)
4731 Elf_Internal_Shdr *symtab_hdr;
4732 struct elf_link_hash_entry **sym_hashes;
4733 const Elf_Internal_Rela *rel;
4734 const Elf_Internal_Rela *rel_end;
4736 struct bfinfdpic_relocs_info *picrel;
4738 if (info->relocatable)
4741 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4742 sym_hashes = elf_sym_hashes (abfd);
4744 dynobj = elf_hash_table (info)->dynobj;
4745 rel_end = relocs + sec->reloc_count;
4746 for (rel = relocs; rel < rel_end; rel++)
4748 struct elf_link_hash_entry *h;
4749 unsigned long r_symndx;
4751 r_symndx = ELF32_R_SYM (rel->r_info);
4752 if (r_symndx < symtab_hdr->sh_info)
4755 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4757 switch (ELF32_R_TYPE (rel->r_info))
4759 case R_BFIN_GOT17M4:
4762 case R_BFIN_FUNCDESC_GOT17M4:
4763 case R_BFIN_FUNCDESC_GOTHI:
4764 case R_BFIN_FUNCDESC_GOTLO:
4765 case R_BFIN_GOTOFF17M4:
4766 case R_BFIN_GOTOFFHI:
4767 case R_BFIN_GOTOFFLO:
4768 case R_BFIN_FUNCDESC_GOTOFF17M4:
4769 case R_BFIN_FUNCDESC_GOTOFFHI:
4770 case R_BFIN_FUNCDESC_GOTOFFLO:
4771 case R_BFIN_FUNCDESC:
4772 case R_BFIN_FUNCDESC_VALUE:
4773 if (! IS_FDPIC (abfd))
4776 case R_BFIN_PCREL24:
4777 case R_BFIN_PCREL24_JUMP_L:
4778 case R_BFIN_BYTE4_DATA:
4779 if (IS_FDPIC (abfd) && ! dynobj)
4781 elf_hash_table (info)->dynobj = dynobj = abfd;
4782 if (! _bfin_create_got_section (abfd, info))
4785 if (! IS_FDPIC (abfd))
4792 if (h->dynindx == -1)
4793 switch (ELF_ST_VISIBILITY (h->other))
4799 bfd_elf_link_record_dynamic_symbol (info, h);
4803 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4805 rel->r_addend, INSERT);
4808 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4809 (info), abfd, r_symndx,
4810 rel->r_addend, INSERT);
4820 switch (ELF32_R_TYPE (rel->r_info))
4822 case R_BFIN_PCREL24:
4823 case R_BFIN_PCREL24_JUMP_L:
4824 if (IS_FDPIC (abfd))
4828 case R_BFIN_FUNCDESC_VALUE:
4829 picrel->relocsfdv++;
4830 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4834 case R_BFIN_BYTE4_DATA:
4835 if (! IS_FDPIC (abfd))
4839 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4843 case R_BFIN_GOT17M4:
4852 case R_BFIN_FUNCDESC_GOT17M4:
4853 picrel->fdgot17m4++;
4856 case R_BFIN_FUNCDESC_GOTHI:
4857 case R_BFIN_FUNCDESC_GOTLO:
4858 picrel->fdgothilo++;
4861 case R_BFIN_GOTOFF17M4:
4862 case R_BFIN_GOTOFFHI:
4863 case R_BFIN_GOTOFFLO:
4867 case R_BFIN_FUNCDESC_GOTOFF17M4:
4868 picrel->fdgoff17m4++;
4871 case R_BFIN_FUNCDESC_GOTOFFHI:
4872 case R_BFIN_FUNCDESC_GOTOFFLO:
4873 picrel->fdgoffhilo++;
4876 case R_BFIN_FUNCDESC:
4881 /* This relocation describes the C++ object vtable hierarchy.
4882 Reconstruct it for later use during GC. */
4883 case R_BFIN_GNU_VTINHERIT:
4884 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4888 /* This relocation describes which C++ vtable entries are actually
4889 used. Record for later use during GC. */
4890 case R_BFIN_GNU_VTENTRY:
4891 BFD_ASSERT (h != NULL);
4893 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4897 case R_BFIN_HUIMM16:
4898 case R_BFIN_LUIMM16:
4899 case R_BFIN_PCREL12_JUMP_S:
4900 case R_BFIN_PCREL10:
4905 (*_bfd_error_handler)
4906 (_("%B: unsupported relocation type %i"),
4907 abfd, ELF32_R_TYPE (rel->r_info));
4915 /* Set the right machine number for a Blackfin ELF file. */
4918 elf32_bfin_object_p (bfd *abfd)
4920 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4921 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4922 == (IS_FDPIC (abfd)));
4926 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4928 elf_elfheader (abfd)->e_flags = flags;
4929 elf_flags_init (abfd) = TRUE;
4933 /* Display the flags field. */
4935 elf32_bfin_print_private_bfd_data (bfd * abfd, void * ptr)
4937 FILE *file = (FILE *) ptr;
4940 BFD_ASSERT (abfd != NULL && ptr != NULL);
4942 /* Print normal ELF private data. */
4943 _bfd_elf_print_private_bfd_data (abfd, ptr);
4945 flags = elf_elfheader (abfd)->e_flags;
4947 /* xgettext:c-format */
4948 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4950 if (flags & EF_BFIN_PIC)
4951 fprintf (file, " -fpic");
4953 if (flags & EF_BFIN_FDPIC)
4954 fprintf (file, " -mfdpic");
4961 /* Merge backend specific data from an object file to the output
4962 object file when linking. */
4965 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4967 flagword old_flags, new_flags;
4968 bfd_boolean error = FALSE;
4970 new_flags = elf_elfheader (ibfd)->e_flags;
4971 old_flags = elf_elfheader (obfd)->e_flags;
4973 if (new_flags & EF_BFIN_FDPIC)
4974 new_flags &= ~EF_BFIN_PIC;
4979 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4980 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
4981 bfd_get_filename (ibfd));
4983 if (!elf_flags_init (obfd)) /* First call, no flags set. */
4985 elf_flags_init (obfd) = TRUE;
4986 elf_elfheader (obfd)->e_flags = new_flags;
4989 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
4992 if (IS_FDPIC (obfd))
4993 (*_bfd_error_handler)
4994 (_("%s: cannot link non-fdpic object file into fdpic executable"),
4995 bfd_get_filename (ibfd));
4997 (*_bfd_error_handler)
4998 (_("%s: cannot link fdpic object file into non-fdpic executable"),
4999 bfd_get_filename (ibfd));
5003 bfd_set_error (bfd_error_bad_value);
5008 /* bfin ELF linker hash entry. */
5010 struct bfin_link_hash_entry
5012 struct elf_link_hash_entry root;
5014 /* Number of PC relative relocs copied for this symbol. */
5015 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
5018 /* bfin ELF linker hash table. */
5020 struct bfin_link_hash_table
5022 struct elf_link_hash_table root;
5024 /* Small local sym cache. */
5025 struct sym_cache sym_cache;
5028 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
5030 static struct bfd_hash_entry *
5031 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
5032 struct bfd_hash_table *table, const char *string)
5034 struct bfd_hash_entry *ret = entry;
5036 /* Allocate the structure if it has not already been allocated by a
5039 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
5043 /* Call the allocation method of the superclass. */
5044 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
5046 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
5051 /* Create an bfin ELF linker hash table. */
5053 static struct bfd_link_hash_table *
5054 bfin_link_hash_table_create (bfd * abfd)
5056 struct bfin_link_hash_table *ret;
5057 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
5059 ret = bfd_zmalloc (amt);
5063 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5064 bfin_link_hash_newfunc,
5065 sizeof (struct elf_link_hash_entry),
5072 ret->sym_cache.abfd = NULL;
5074 return &ret->root.root;
5077 /* The size in bytes of an entry in the procedure linkage table. */
5079 /* Finish up the dynamic sections. */
5082 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5083 struct bfd_link_info *info)
5088 dynobj = elf_hash_table (info)->dynobj;
5090 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5092 if (elf_hash_table (info)->dynamic_sections_created)
5094 Elf32_External_Dyn *dyncon, *dynconend;
5096 BFD_ASSERT (sdyn != NULL);
5098 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5099 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5100 for (; dyncon < dynconend; dyncon++)
5102 Elf_Internal_Dyn dyn;
5104 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5112 /* Finish up dynamic symbol handling. We set the contents of various
5113 dynamic sections here. */
5116 bfin_finish_dynamic_symbol (bfd * output_bfd,
5117 struct bfd_link_info *info,
5118 struct elf_link_hash_entry *h,
5119 Elf_Internal_Sym * sym)
5123 dynobj = elf_hash_table (info)->dynobj;
5125 if (h->got.offset != (bfd_vma) - 1)
5129 Elf_Internal_Rela rela;
5132 /* This symbol has an entry in the global offset table.
5135 sgot = bfd_get_linker_section (dynobj, ".got");
5136 srela = bfd_get_linker_section (dynobj, ".rela.got");
5137 BFD_ASSERT (sgot != NULL && srela != NULL);
5139 rela.r_offset = (sgot->output_section->vma
5140 + sgot->output_offset
5141 + (h->got.offset & ~(bfd_vma) 1));
5143 /* If this is a -Bsymbolic link, and the symbol is defined
5144 locally, we just want to emit a RELATIVE reloc. Likewise if
5145 the symbol was forced to be local because of a version file.
5146 The entry in the global offset table will already have been
5147 initialized in the relocate_section function. */
5150 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5152 (*_bfd_error_handler) (_("*** check this relocation %s"),
5154 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24);
5155 rela.r_addend = bfd_get_signed_32 (output_bfd,
5159 offset & ~(bfd_vma) 1)));
5163 bfd_put_32 (output_bfd, (bfd_vma) 0,
5164 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5165 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT);
5169 loc = srela->contents;
5170 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5171 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5178 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5179 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
5180 || h == elf_hash_table (info)->hgot)
5181 sym->st_shndx = SHN_ABS;
5186 /* Adjust a symbol defined by a dynamic object and referenced by a
5187 regular object. The current definition is in some section of the
5188 dynamic object, but we're not including those sections. We have to
5189 change the definition to something the rest of the link can
5193 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5194 struct elf_link_hash_entry *h)
5198 unsigned int power_of_two;
5200 dynobj = elf_hash_table (info)->dynobj;
5202 /* Make sure we know what is going on here. */
5203 BFD_ASSERT (dynobj != NULL
5205 || h->u.weakdef != NULL
5206 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5208 /* If this is a function, put it in the procedure linkage table. We
5209 will fill in the contents of the procedure linkage table later,
5210 when we know the address of the .got section. */
5211 if (h->type == STT_FUNC || h->needs_plt)
5216 /* If this is a weak symbol, and there is a real definition, the
5217 processor independent code will have arranged for us to see the
5218 real definition first, and we can just use the same value. */
5219 if (h->u.weakdef != NULL)
5221 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5222 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5223 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5224 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5228 /* This is a reference to a symbol defined by a dynamic object which
5229 is not a function. */
5231 /* If we are creating a shared library, we must presume that the
5232 only references to the symbol are via the global offset table.
5233 For such cases we need not do anything here; the relocations will
5234 be handled correctly by relocate_section. */
5238 /* We must allocate the symbol in our .dynbss section, which will
5239 become part of the .bss section of the executable. There will be
5240 an entry for this symbol in the .dynsym section. The dynamic
5241 object will contain position independent code, so all references
5242 from the dynamic object to this symbol will go through the global
5243 offset table. The dynamic linker will use the .dynsym entry to
5244 determine the address it must put in the global offset table, so
5245 both the dynamic object and the regular object will refer to the
5246 same memory location for the variable. */
5248 s = bfd_get_linker_section (dynobj, ".dynbss");
5249 BFD_ASSERT (s != NULL);
5251 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5252 copy the initial value out of the dynamic object and into the
5253 runtime process image. We need to remember the offset into the
5254 .rela.bss section we are going to use. */
5255 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5259 srel = bfd_get_linker_section (dynobj, ".rela.bss");
5260 BFD_ASSERT (srel != NULL);
5261 srel->size += sizeof (Elf32_External_Rela);
5265 /* We need to figure out the alignment required for this symbol. I
5266 have no idea how ELF linkers handle this. */
5267 power_of_two = bfd_log2 (h->size);
5268 if (power_of_two > 3)
5271 /* Apply the required alignment. */
5272 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5273 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5275 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5279 /* Define the symbol as being at this point in the section. */
5280 h->root.u.def.section = s;
5281 h->root.u.def.value = s->size;
5283 /* Increment the section size to make room for the symbol. */
5289 /* The bfin linker needs to keep track of the number of relocs that it
5290 decides to copy in check_relocs for each symbol. This is so that it
5291 can discard PC relative relocs if it doesn't need them when linking
5292 with -Bsymbolic. We store the information in a field extending the
5293 regular ELF linker hash table. */
5295 /* This structure keeps track of the number of PC relative relocs we have
5296 copied for a given symbol. */
5298 struct bfin_pcrel_relocs_copied
5301 struct bfin_pcrel_relocs_copied *next;
5302 /* A section in dynobj. */
5304 /* Number of relocs copied in this section. */
5305 bfd_size_type count;
5308 /* This function is called via elf_link_hash_traverse if we are
5309 creating a shared object. In the -Bsymbolic case it discards the
5310 space allocated to copy PC relative relocs against symbols which
5311 are defined in regular objects. For the normal shared case, it
5312 discards space for pc-relative relocs that have become local due to
5313 symbol visibility changes. We allocated space for them in the
5314 check_relocs routine, but we won't fill them in in the
5315 relocate_section routine.
5317 We also check whether any of the remaining relocations apply
5318 against a readonly section, and set the DF_TEXTREL flag in this
5322 bfin_discard_copies (struct elf_link_hash_entry *h, void * inf)
5324 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5325 struct bfin_pcrel_relocs_copied *s;
5327 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5329 if ((info->flags & DF_TEXTREL) == 0)
5331 /* Look for relocations against read-only sections. */
5332 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5333 s != NULL; s = s->next)
5334 if ((s->section->flags & SEC_READONLY) != 0)
5336 info->flags |= DF_TEXTREL;
5344 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5345 s != NULL; s = s->next)
5346 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5352 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5353 struct bfd_link_info *info)
5359 dynobj = elf_hash_table (info)->dynobj;
5360 BFD_ASSERT (dynobj != NULL);
5362 if (elf_hash_table (info)->dynamic_sections_created)
5364 /* Set the contents of the .interp section to the interpreter. */
5365 if (info->executable)
5367 s = bfd_get_linker_section (dynobj, ".interp");
5368 BFD_ASSERT (s != NULL);
5369 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5370 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5375 /* We may have created entries in the .rela.got section.
5376 However, if we are not creating the dynamic sections, we will
5377 not actually use these entries. Reset the size of .rela.got,
5378 which will cause it to get stripped from the output file
5380 s = bfd_get_linker_section (dynobj, ".rela.got");
5385 /* If this is a -Bsymbolic shared link, then we need to discard all
5386 PC relative relocs against symbols defined in a regular object.
5387 For the normal shared case we discard the PC relative relocs
5388 against symbols that have become local due to visibility changes.
5389 We allocated space for them in the check_relocs routine, but we
5390 will not fill them in in the relocate_section routine. */
5392 elf_link_hash_traverse (elf_hash_table (info),
5393 bfin_discard_copies, info);
5395 /* The check_relocs and adjust_dynamic_symbol entry points have
5396 determined the sizes of the various dynamic sections. Allocate
5399 for (s = dynobj->sections; s != NULL; s = s->next)
5404 if ((s->flags & SEC_LINKER_CREATED) == 0)
5407 /* It's OK to base decisions on the section name, because none
5408 of the dynobj section names depend upon the input files. */
5409 name = bfd_get_section_name (dynobj, s);
5413 if (CONST_STRNEQ (name, ".rela"))
5417 /* If we don't need this section, strip it from the
5418 output file. This is mostly to handle .rela.bss and
5419 .rela.plt. We must create both sections in
5420 create_dynamic_sections, because they must be created
5421 before the linker maps input sections to output
5422 sections. The linker does that before
5423 adjust_dynamic_symbol is called, and it is that
5424 function which decides whether anything needs to go
5425 into these sections. */
5432 /* We use the reloc_count field as a counter if we need
5433 to copy relocs into the output file. */
5437 else if (! CONST_STRNEQ (name, ".got"))
5439 /* It's not one of our sections, so don't allocate space. */
5445 s->flags |= SEC_EXCLUDE;
5449 /* Allocate memory for the section contents. */
5450 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5451 Unused entries should be reclaimed before the section's contents
5452 are written out, but at the moment this does not happen. Thus in
5453 order to prevent writing out garbage, we initialise the section's
5454 contents to zero. */
5455 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5456 if (s->contents == NULL && s->size != 0)
5460 if (elf_hash_table (info)->dynamic_sections_created)
5462 /* Add some entries to the .dynamic section. We fill in the
5463 values later, in bfin_finish_dynamic_sections, but we
5464 must add the entries now so that we get the correct size for
5465 the .dynamic section. The DT_DEBUG entry is filled in by the
5466 dynamic linker and used by the debugger. */
5467 #define add_dynamic_entry(TAG, VAL) \
5468 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5472 if (!add_dynamic_entry (DT_DEBUG, 0))
5479 if (!add_dynamic_entry (DT_RELA, 0)
5480 || !add_dynamic_entry (DT_RELASZ, 0)
5481 || !add_dynamic_entry (DT_RELAENT,
5482 sizeof (Elf32_External_Rela)))
5486 if ((info->flags & DF_TEXTREL) != 0)
5488 if (!add_dynamic_entry (DT_TEXTREL, 0))
5492 #undef add_dynamic_entry
5497 /* Given a .data section and a .emreloc in-memory section, store
5498 relocation information into the .emreloc section which can be
5499 used at runtime to relocate the section. This is called by the
5500 linker when the --embedded-relocs switch is used. This is called
5501 after the add_symbols entry point has been called for all the
5502 objects, and before the final_link entry point is called. */
5505 bfd_bfin_elf32_create_embedded_relocs (bfd *abfd,
5506 struct bfd_link_info *info,
5511 Elf_Internal_Shdr *symtab_hdr;
5512 Elf_Internal_Sym *isymbuf = NULL;
5513 Elf_Internal_Rela *internal_relocs = NULL;
5514 Elf_Internal_Rela *irel, *irelend;
5518 BFD_ASSERT (! info->relocatable);
5522 if (datasec->reloc_count == 0)
5525 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5527 /* Get a copy of the native relocations. */
5528 internal_relocs = (_bfd_elf_link_read_relocs
5529 (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL,
5530 info->keep_memory));
5531 if (internal_relocs == NULL)
5534 amt = (bfd_size_type) datasec->reloc_count * 12;
5535 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5536 if (relsec->contents == NULL)
5539 p = relsec->contents;
5541 irelend = internal_relocs + datasec->reloc_count;
5542 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5544 asection *targetsec;
5546 /* We are going to write a four byte longword into the runtime
5547 reloc section. The longword will be the address in the data
5548 section which must be relocated. It is followed by the name
5549 of the target section NUL-padded or truncated to 8
5552 /* We can only relocate absolute longword relocs at run time. */
5553 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5555 *errmsg = _("unsupported reloc type");
5556 bfd_set_error (bfd_error_bad_value);
5560 /* Get the target section referred to by the reloc. */
5561 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5563 /* A local symbol. */
5564 Elf_Internal_Sym *isym;
5566 /* Read this BFD's local symbols if we haven't done so already. */
5567 if (isymbuf == NULL)
5569 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5570 if (isymbuf == NULL)
5571 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5572 symtab_hdr->sh_info, 0,
5574 if (isymbuf == NULL)
5578 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5579 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5584 struct elf_link_hash_entry *h;
5586 /* An external symbol. */
5587 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5588 h = elf_sym_hashes (abfd)[indx];
5589 BFD_ASSERT (h != NULL);
5590 if (h->root.type == bfd_link_hash_defined
5591 || h->root.type == bfd_link_hash_defweak)
5592 targetsec = h->root.u.def.section;
5597 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5598 memset (p + 4, 0, 8);
5599 if (targetsec != NULL)
5600 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5603 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5605 if (internal_relocs != NULL
5606 && elf_section_data (datasec)->relocs != internal_relocs)
5607 free (internal_relocs);
5611 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5613 if (internal_relocs != NULL
5614 && elf_section_data (datasec)->relocs != internal_relocs)
5615 free (internal_relocs);
5619 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5621 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5622 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5623 { NULL, 0, 0, 0, 0 }
5627 #define TARGET_LITTLE_SYM bfin_elf32_vec
5628 #define TARGET_LITTLE_NAME "elf32-bfin"
5629 #define ELF_ARCH bfd_arch_bfin
5630 #define ELF_TARGET_ID BFIN_ELF_DATA
5631 #define ELF_MACHINE_CODE EM_BLACKFIN
5632 #define ELF_MAXPAGESIZE 0x1000
5633 #define elf_symbol_leading_char '_'
5635 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5636 #define bfd_elf32_bfd_reloc_name_lookup \
5637 bfin_bfd_reloc_name_lookup
5638 #define elf_info_to_howto bfin_info_to_howto
5639 #define elf_info_to_howto_rel 0
5640 #define elf_backend_object_p elf32_bfin_object_p
5642 #define bfd_elf32_bfd_is_local_label_name \
5643 bfin_is_local_label_name
5644 #define bfin_hash_table(p) \
5645 ((struct bfin_link_hash_table *) (p)->hash)
5649 #define elf_backend_create_dynamic_sections \
5650 _bfd_elf_create_dynamic_sections
5651 #define bfd_elf32_bfd_link_hash_table_create \
5652 bfin_link_hash_table_create
5653 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5655 #define elf_backend_check_relocs bfin_check_relocs
5656 #define elf_backend_adjust_dynamic_symbol \
5657 bfin_adjust_dynamic_symbol
5658 #define elf_backend_size_dynamic_sections \
5659 bfin_size_dynamic_sections
5660 #define elf_backend_relocate_section bfin_relocate_section
5661 #define elf_backend_finish_dynamic_symbol \
5662 bfin_finish_dynamic_symbol
5663 #define elf_backend_finish_dynamic_sections \
5664 bfin_finish_dynamic_sections
5665 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5666 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5667 #define bfd_elf32_bfd_merge_private_bfd_data \
5668 elf32_bfin_merge_private_bfd_data
5669 #define bfd_elf32_bfd_set_private_flags \
5670 elf32_bfin_set_private_flags
5671 #define bfd_elf32_bfd_print_private_bfd_data \
5672 elf32_bfin_print_private_bfd_data
5673 #define elf_backend_final_write_processing \
5674 elf32_bfin_final_write_processing
5675 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5676 #define elf_backend_stack_align 8
5677 #define elf_backend_can_gc_sections 1
5678 #define elf_backend_special_sections elf32_bfin_special_sections
5679 #define elf_backend_can_refcount 1
5680 #define elf_backend_want_got_plt 0
5681 #define elf_backend_plt_readonly 1
5682 #define elf_backend_want_plt_sym 0
5683 #define elf_backend_got_header_size 12
5684 #define elf_backend_rela_normal 1
5686 #include "elf32-target.h"
5688 #undef TARGET_LITTLE_SYM
5689 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5690 #undef TARGET_LITTLE_NAME
5691 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5693 #define elf32_bed elf32_bfinfdpic_bed
5695 #undef elf_backend_gc_sweep_hook
5696 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5698 #undef elf_backend_got_header_size
5699 #define elf_backend_got_header_size 0
5701 #undef elf_backend_relocate_section
5702 #define elf_backend_relocate_section bfinfdpic_relocate_section
5703 #undef elf_backend_check_relocs
5704 #define elf_backend_check_relocs bfinfdpic_check_relocs
5706 #undef bfd_elf32_bfd_link_hash_table_create
5707 #define bfd_elf32_bfd_link_hash_table_create \
5708 bfinfdpic_elf_link_hash_table_create
5709 #undef elf_backend_always_size_sections
5710 #define elf_backend_always_size_sections \
5711 elf32_bfinfdpic_always_size_sections
5713 #undef elf_backend_create_dynamic_sections
5714 #define elf_backend_create_dynamic_sections \
5715 elf32_bfinfdpic_create_dynamic_sections
5716 #undef elf_backend_adjust_dynamic_symbol
5717 #define elf_backend_adjust_dynamic_symbol \
5718 elf32_bfinfdpic_adjust_dynamic_symbol
5719 #undef elf_backend_size_dynamic_sections
5720 #define elf_backend_size_dynamic_sections \
5721 elf32_bfinfdpic_size_dynamic_sections
5722 #undef elf_backend_finish_dynamic_symbol
5723 #define elf_backend_finish_dynamic_symbol \
5724 elf32_bfinfdpic_finish_dynamic_symbol
5725 #undef elf_backend_finish_dynamic_sections
5726 #define elf_backend_finish_dynamic_sections \
5727 elf32_bfinfdpic_finish_dynamic_sections
5729 #undef elf_backend_discard_info
5730 #define elf_backend_discard_info \
5731 bfinfdpic_elf_discard_info
5732 #undef elf_backend_can_make_relative_eh_frame
5733 #define elf_backend_can_make_relative_eh_frame \
5734 bfinfdpic_elf_use_relative_eh_frame
5735 #undef elf_backend_can_make_lsda_relative_eh_frame
5736 #define elf_backend_can_make_lsda_relative_eh_frame \
5737 bfinfdpic_elf_use_relative_eh_frame
5738 #undef elf_backend_encode_eh_address
5739 #define elf_backend_encode_eh_address \
5740 bfinfdpic_elf_encode_eh_address
5742 #undef elf_backend_may_use_rel_p
5743 #define elf_backend_may_use_rel_p 1
5744 #undef elf_backend_may_use_rela_p
5745 #define elf_backend_may_use_rela_p 1
5746 /* We use REL for dynamic relocations only. */
5747 #undef elf_backend_default_use_rela_p
5748 #define elf_backend_default_use_rela_p 1
5750 #undef elf_backend_omit_section_dynsym
5751 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5753 #include "elf32-target.h"